Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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SPECIFICATION
.
This invention improves the post driving maahine of
my Canadian patent application Serial No. 250,522 filed
April 20, 1976, by providing a stanchion type tower supporting
and guiding a down-crowded carriage for the hydraulic hammer
which is easily mounted on and removed from a boom structure
carried from a truck. The boom structure preferably includes
a pedestal mounted upright on the frame of a one-ton open-top
box body truck near the center of the box. A telescoped ex-
tensible boom assembly is carried at the top of the pedestal
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and is rotatable through a full 360 degrees. The stanchion
is detachably mounted on the free end of the boom by easily
accessible fasteners. The pedestal also mounts a control
station with an operator's seat that rotates with the boom.
`i Hydraulic jacks or motors, raise, lower and swing the boom
and tilt the stanchion in all directions relative to the boom. -
The truck has an upstanding frame mounted behind the cab sup- ~
porting the boom and stanchion at a low level travel position -`-
and the truck frame rotatably supports a rigid transverse tube
or bar with arms shackled to the rear axle springs of the ,
truck to maintain the frame level with the ground under load
from the boom thereby avoiding the necessity for outriggers.
The operator's station is equipped with a sighting device
showing the deviation of the stanchion from a vertical upright - -~
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position. The stanchion carries a hammer guide or carriage
suspending a spring-supporting anvil and the carriage is hy- ~i
draulically raised and lowered along the length of the stan- `
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chion to position the anvil for resting on top of the work
piece and to compress the anvil spring to maintain the ;
anvil continuously in contact with the work piece. The
hammer is propelled by a tension spring and an upright hy-
draulic jack raises the hammer and stretches the spring to
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control the length of the hammer stroke. Fluid from the - -
hydraulic jack is dumped by a rotating valve, the speed of
which is accurately controlled from the operator's station to
regulate the length and rate of the stroke of the hammer. On
its hammer-lifting and spring-stretching cycle the hydraulic
jack compresses air in the` jack cylinder above the piston to
flow out of the top of the jack into the conduit returning
hydraulic fluid dumped from the rotating valve to the tank so
that upon dumping of the fluid from the valve the air will
cushion the surge of fluid and minimize shock loads on the
return conduit. A safety hydraulic circuit is also provided
to prevent operation of the lifting jack until the anvil
spring is compressed.
It is then an o~ject of this invention to improve
the post driving machine of my aforesaid Canadian patent
application Serial No. 250,522 filed April 20, 1976, by pro-
viding a stanchion post on a derrick rig with means on the
rig pressing the post against the work site to be acted upon
by the hammer tool.
The invention provides a slidable carriage on the
stanchion post which is pressed against the work site, and
this carriage mounts a hammer tool with a spring loaded sus- ~;-
pended anvil struck by the hammer of the tool. The hammer
tool is down crowded to compress the spring of the spring-
loaded anvil causing the anvil to follow the work piece and
minimize recoil of the hammer tool. Hydraulic means are pro-
vided for raising and lowering the carriage on the stanchion,
hydraulic means are provided for powering the hammer to impact
against the work piece and hydraulic mechanism is provided to
manipulate the derrick or rig assembly to position the driving
tool at a selected work site.
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A speed sensitive dump valve controls the stroke
and rate of the hammer blows, and this valve is manually
controlled or adjusted to vary the stroke and rate.
The hydraulic mechanism for driving the hammer ;;
stretches tension springs which will propel the hammer against
the anvil. This hydraulic mechanism compresses air on the
hammer lifting stroke which is vented to the discharge side
of the speed sensitive dump valve to cushion the discharge.
The stanchion post is hollow and has an extension
foot replacably and adjustably mounted on the lower end of the
post for engaging the surface of the work site.
A work piece guide can be removably mounted on the
lower end of the stanchion post to slidably guide the work
piece.
The end of the derrick assembly suspending the
driving tool has a cap with means to rotate and tilt the
driving tool relative to the derrick assembly.
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The following detailed descriptions of the
embodiments of the invention shown on the annexed sheets of
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drawings will make readily apparent to those skilled in the -
art other and further objects and features of the invention.
ON THE DRAWINGS
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Fig. 1 is a side elevational view of a truck-mounted
post driving machine according to this invention showing the
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opcrating posi~-ion in solid lines and the low level travcl position
in ~otted lines.
Fig. 2 is a fragmentary transverse elevational view of
the control station of ~he machine taken generally along the line
II-II of Fig. 1.
Fig. 3 is a fragmentary longitudinal view of the control
s~ation taken generally along the line III-III of Fig. 2.
Fig. 4 is a transverse sectional view, with parts and
elevation, taken along the line IV-IV of Fig. 1.
Fig. S is a fragmentary side elevational view of the
free end of the boom of the machine of Pig. 1 and the post
driving tool detachably mounted thereon.
Figure S-A is a fragmentary cross-sectional view
generally along the line VA-VA of Fig. S but displaced from this ~-;
line to extend through the roller axes.
Pig. 5-B is a fragmentary horizontal cross-sectional ~ -
view along the line VB-VB of Fig. S.
Fig. 6 is a transverse sectional view along the line
VI-VI of Fig. 5.
Fig. 7 is a fragmentary rear elevational view of the
post driving tool attachment of Pig. 5.
Pig. 8 is a top plan view with parts in horizontal
section taken generally along the line VIII-VIII of Pig. 5.
Pig. 9 is a fragmentary longitudinal sectional view with ~ -
parts in elevation taken along the line IX-IX of Pig. 7,
Pig. 10 is a horizontal section.ll view taken generally
alon~ the line X-X of Fig. 1 witll parts broken away ~o show
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underlying structure.
Fig. 11 is a vertical sectional view takcn generally
along the line XI-XI of Fig. 10.
Fig. 12 is a vertical sectional view, with parts in
elevation, of a tilt switch attached to the stanchion and taken
generally along the lines XII-XII of Fig. 1.
Fig. 13 is a top plan view of the tilt switch of Pig. 12
with parts in transverse section and a wiring diagram illustrating
the manner in which the switch is connected to a sighting device
at the operator's station. : -
Fig. 14 is a fragmentary side elevational view of the
lower end of the stanchion carrying a removable foot plate and
post guide
Fig. 15 is a horizontal sectional view, with parts in
top plan, taken along the lines of XV-XV of Fig. 14.
Fig. 16 is a fragmentary elevational view of the lower
end of the stanchion on which a foot plate with an elongated leg
portion is mounted to increase the height of the stanchion when
resting on the ground.
Pig. 17 is a transverse cross-sectional view taken
along the lines XVII-XVII of Fig. 8.
Fig. 18 is a top plan view of the stanchion showing the
motor drive for down-crowding.
~ig, 19 i9 a side elevation along the line XIX-XIX of
Pig. 18.
Pig. 20 is a diagrammatic view of the hydraulic control
~ystem for the machine.
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As ~hown in I;ig, 1, the driving machinc ]0 includcs a
standard au~omotive vehicle, such as an open box trucl~ 11, a
hydraulic derrick asscmbly 12 mounted on the truck 11, and a
driving tool assembly 1~ detachably mounted on the free end of an
S extensible boom of the derrick assembly 12.
The tool assembly 13 includes a stanchion type tower
14, a carxiage 15 slidably mounted on the stancllion 14, a hamrner
housing and anvil support 16 mounted on the carriage 15 rearwardly
of the stanchion 14, a hydraulic hammer lift mechanism 17,
carried by the housing 16, and a hydraulic control system 18
operated from a station that rotates with the derrick assembly 12.
As illustrated in Fig. 1, the vehicle 11 is a convention-
al three-quarter or one-ton open-box truck with a driver's cab 19
at the front thereof and an open-top box body 20 at the rear thereof
over the rear wheels 21. An upright inverted U-shaped frame 22
is mounted on the truck 11 behind the cab 19 and as shown in Fig.
4 has an open-top support 23 for the boom of the derrick assembly
12 and a depending strap receptacle 24 for the stanchion 14 of the
tool assembly 13. The support 23 and strap 24 are mounted on
the top bight portion of the U-shaped frame 22 midway between the
side legs of the frame and as shown in Fig. 1, the frame 22 pro-
jects above the ca~ 19 just far enough so that the tool 13 will
leave the windshield of the cab 19 unobstructed when the derrick 12
and tool 13 are in their stored travel position shown in dotted
line~ in Fi~ 1 with the stanchion suspended in the strap 24,
As shown in Figs. 1, 10, and 11, the truclc 11 has a
frame 25 frorn which a rear a~le 26 for the rear wheels 21 is
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suspendcd by lcaf spring.s 27. A cross framc brace 2.~a mounts
sleeve bea~ings 28 adjacent the longitudinal frame beams 25b and
a stiiY torque resisting tube 29 is rotatably n ounted adjacent its
ends in thesc bearings 28. If desired a single tubular bearing 28
S could span the length of the cross frame 25a to rotatably mount
the tube 29 along its own entire length to prevent buckling of the
tube under torsion loads. The ends of the tube 29 have rearward-
ly extending stabilizer arms 30 fixedly secured thereto and the
rear ends of these arms 30 are connected thl^ough pivoted links 31
with spring shackle bolts 32 embracing the axle 26 and straddling
the springs 27 at their mid points.
This arrangement of the tube 29, stabilizer arms 30
and links 31 accommodates flexing of the springs 27 to provide
the spring suspension for the vehicle frame 25, but prevents the
springs on one side of the trucl~ from being flattened under load
more than the springs on the other side of the truck, thereby
stabilizing the truck frame against transverse tilting under load.
This stabilizer arrangement avoids the necessity for outriggers on
the truck 11 since the frame of the truck 25 cannot tilt laterally
under the load of the derrick 12 and tool 13 and a stable platform
for the derrick 12 is insured,
As shown in Fig. 1, the derrick 12 has a pedes~al
mounting 33 supported from the truck frame 25 on a base plate
34, A hole is cut through the box body 20 so that the base plate
34 may be boltcd directly to the frame 25 and the pedestal 33
permitted to projcct into thc body 20 at about the mid point
thereof over the rear wheels 21. An upright inner mast or
Spilldle 35 plOj~CtS from th~ pedestal base 33 and rotatably mount:3
an outer mast or sleeve 36 which is rotated by hyc~aulic motor 37
tbrough a worm and ring gear drive 38.
The operator's station 18 is mounted on one side of the
outer mast or sleeve 36 and the upper end of the mast supports
the inner end of a lower boom 39 on a horizontal pivot 40. This
lower boom 39 is raised and lowered cabout the pivot 40 by a
hydraulic jack 41 supported from the base of the mast 36. The
lower boom 39 is hollow and telescopically mounts an upper boom -
42 which is propelled into and out of the boom 39 by a hydraulic
jack 43.
The mast sleeve 36 mounts the derrick booms 39 and
42 for a full 360 degree rotation around the mast 3~ of the pede-
stal mounting 33 and the operator's station 18 rotates therewith so -
that the operator is always facing the tool 13 mounted on the free
end of the boom 42. The lower boom 39 is swingable on its
pivot base 40 from a substantially vertical high~ position to a
lower than horizontal position as shown in Fig. 1 and the hydraulic
jack 41 is effective to load the boom assembly downwardly for
pressing the stanchion 14 of the tool 13 tightly against the ground.
To swing the tool 13 from its ground supported
upright position rearwardly o~ the truck shown in Fig. 1 to any
other operating position, the boom 39 is merely lifted to raise the
stanchion 14 of~ the ground and rotated to the desired work site
which could be on either side of the truck or even above the truck.
To move the derrick 12 and the tool 13 to the low-lcvel storage
po~ition for travel, ~8 shown in dotted lines in l-~'ig. l";he tool is
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tiltcd back unde~ the boom 39 and m~nipulated to move thc
stanchion 14 in~o the strap 24 whereupon the boom 39 may then be
lowered in~o the support 23.
As sbown in Fig. S, the tool 13 is detachably mounted
on the end of the upper boom 42 by a cap unit 44 fitting over the.
free end of the upper boom 42 and secured thereto by bolts 45.
This cap 44 as also shown in Figs. 6 and 8, has a fixed ring .
gear 46 around which is meshed a sprocket chain 47 which is also
trained around the driven gear 48 of a hydraulic motor 49 which
is mounted on a head SO that is rotatable around a spindle 51
extending from the cap 44 as shown in ~ig. 6. The arrangement
is such that the chain 47 is held stationary by the cap 44 and ~ .
when the gear 48 is driven, the motor pulls the head SO around ..
the spindle 51.
The rear end of the head 50 is pivoted by a pin 52 to
a rearwardly projecting rib 53 of the stanchion 14. Four bolts 45
positioned in diametrically opposite pairs are sufficient to secure
the cap 44 to the boom 42 and are easily accessible for removal
to detach the tool 13 from the boom 42.
A hydraulic jack 54 is pivotally mounted on the head 50
and as shown in Fig. 1, has its piston rod ~5 pivoted to a bracket
56 pqojecting from the front side of the stanchion 14 adjacent the `
upper end of the stanchion. This jack 54 is effective to tilt the
stanchion forwardly and rearwardly while the hydraulic motor 49 ~ ;~
is effective to rotate the stanchion on l:he end of the boom 42.
In this manner the attitude of the stancl~ion 14 relative to the
ground or other ~urface to be impacted is accurately con~roll~d. :-
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~s shown in Figs. 6, 8 and 17, the head 50 support~
a second hydraulic inotor 57 driving reducing gears (not shown) in
a gear box 58 having an output shaft 59 which, as shown in Fig.
17, is coupled tO a shaft 60 of a ball valve 61. The ball valve 61
S has a housin~ with an inlet 62 and an outlet 63 together with a ball
chamber between the inlet and outlet forming a socket for a ball
64 rotated by the shaft 60. The ball 64 has a bore 64a there-
through joining the inlet 62 with the outlet 63. When the ball
valve 64 is rotated 90 degrees from the position shown in Fig. 17,
it closes communication between the inlet and outlet. The
arrangement is such that when the ball 64 is rotated a full revolu-
tion, the valve 61 will perform two opening and two closing cycles.
The speed of xotation of the ball 64 thus controls the rate of the
opening and closing cycles.
As shown in Figs. 8, 9, 14 and lS, the stanchion 14
is a hollow square post 65 with a rear corner facing lhe carriage
15 and a front corner facing the head SQ
As shown in Figs. 1, 18, 19 and 20 the top end of
this post 65 rotatably supports a sprocket 66 driven by a chain 67
from a hydraulic motor 68 mounted on the bracket 56 which ~ -
projects from the rear corner of the post 6S.
As æhown in Figs. 1, 5, 9 and 20, the stanchion post
65 also rotatably mounts a sprocket 69 near the bottom end -
thereof on bearing blocks 70 that are vertically adjustable by a
screw adjustment 71. The sp~ocket 69 is aligned with the ~:op
sprocket 66 and extends through a wlndow cut through the rear
corner of the stanchion post 65.
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~ sprocket chain 72 is trained around the sprock~ts 66
and 69 and has an inner run 72a extending through the hollow
stanchion post 65 (Fig. 18) and an outer run 72b outside of the
stanchion post over the rear corner thereof.
The bot~om of the post 65, as shown in Figs. 9, 14
and 15 has an enlarged foot plate 73 mounted thereon to rest on
the grouncl G. This foot plate 73 has an upstanding square tube
74 centered thereon and slidably ~ltting the post 65.
A removable pin 75 extends through aligned holes in
the post 65 and tube 74 to secure the foot plate to the bottom of
the post.
As shown in Fig. 16, the effective length of the post 65
is increased by removing the foot plate tube 74 from the bottom
end of the post 65 and replacing it with an extension tube 76 that
fits over the bottom end of the post 6S and is secured thereto by
the same pin 75 used for the tube 74. This extension post 76 has
a foot plate 77 on the bottom end thereof adapted to rest on the
ground G so that when the tool 13 is to be used for driving long
posts or other work piece~ into the ground, it can be extended to
any desired height by use of variable lengths of extension of tubes
76. '~
The carriage 15, as shown in Figs. 5, 8 and 9 has a ~ -
square hollow tube 78 slidably mounted on the post 65 with a slot
or cleft gap 78a (~ig. 8) in its front corner accommodating free
passage of the rib 53 therethrough. This tubular base 78 is only
a fraction of the length of the post 65 BO as to have an extended
travel length from the bottom to the top of the post 65.
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A~ shown in Figs. 5 and 9, ~-he outer run 72b of the
chain 72 is anchorcd to brackets 79 at the top and bottom cnds of
the carxiage tube 78, The chain thus drives the tubular basc 78
of the carriage along the length of the tubular post 65.
An upstanding sleeve 80 is carried by the carriage base
tube 78 from a rib 81 secured on the rear corner of the base 78
and from welded-on bracket plates 8~ at the top and bottom ends
of this rib 81, as shown in Figs. 5 and 9. The sleeve 80 is
formed in two longitudinal halves bolted together by bolts 83
extending through mating flanges provided on these halves. The
arrangement is such that the outer half can be removed from the
inner half of the sleeve 80 to permit installation of the hammer -
housing as hereinafter describea
As shown in Figs. 5 and 7 to 9, the hammer housing
and anvil support 16 include a tubular barrel 84 extending through
the tubular bracket sleeve 80 and fixedly clamped therein so as to ~-
parallel the stanchion post 65 and travel with the carriage base 78.
As shown in Figs. 5, S-A and 9 to further lock the barrel 84 to
the base 78 and prevent sliding of the barrel in the sleeve 80, the
bracket 79 at the bottom end of the carriage tube 78 extends
between two lugs 84b welded on the barrel 84 and a removable pin
P extends through mating holes in the lugs and bracket. The pin ~ -
P is removed when the outer half of the bracket sleeve 80 is
removed so that the barrel may be removed from the carriage.
The top end of the barrel 84 projects above the tubular ~ ~ -
bracket 80 and has four angle iron legs 85 extending upwardly --
therefrorn to a cap 86 with a rubber bumper 87 on its lower face, -~
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The bottom of the barrel 84 projects below the tubular
mounting slceve 80 and has an out-turned flnnge 88 spaced from
its open bottom end. A sleeve 89 is slidably mounted in this open
bottom end of the barrel 84 and has an anvil head 90 (Fig. 9)
secured in its upper end thereof. The bottom of the sleeve has an
out-turned flange 91 and rods or straps 92 suspended from the
flange 88 of the barrel fft freely through lloles in the flange 91.
Pins or nuts 93 on the bottom ends of these straps or rods receive
the flange 91 thereagainst to maintain the sleeve 89 in the barrel
84. A compression coil spring 94 surrounds the bottom end of
the barrel 84 and has its ends abutting the flanges 88 and 91.
Three or fou~ rods or straps 92 spaced equally around the barrel
84 are sufficient to slidably suspend the sleeve 89 from the barrel.
As shown in Fig. 9, a work piece W. P. extends into
the sleeve 89 with the anvil head 90 resting on the top thereof~
When, as hereinafter described, the carriage 15 is down-powered -
to move the barrel 84 for pressing the anvil head 90 against the
work piece W. P., the spring 94 will be compressed and will be
effective to maintain the anvil head 90 constantly against the work
piece, -
The barrel 84 as shown in ~igs. 5, 5-A, 7 and 8
rotatably supports two sets of four rollers 9S arranged symmetri- -
cally around the barrel with the first set being at a level adjacent
the top of the barrel and the second set being at a lower level but
above the bottom of the baxrel. Each roller 95 is rotatable about
an axis tran~versely of the barrel and projects through a slot 96
(Pig. 5-~) in the barrel 84 so that it will pqesent a rolling face
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interiorly of the b~rrel. Thc rollers 95 are supportcd on axlcs
carried by ears 97 projecting from the barrel on each side of each
xoller.
A heavy hammer 98 of circular cross section and
substantial length fits freely in the barrel 84 and rides on the
rollers 95 as best shown in Figs. 5-A and 9. The hammer 98
preferably has a reduced diameter hardened leading end 99 for
impacting against the anvil 90. The stroke of the hammer in the
barrel 84 is between this anvil 90 and the top bumper 87 depending
from the cap 86 supported in spaced relation from the top of the
barrel 84 by the angle iron legs 85. The relative lengths of the
barrel 84 and hammer 98 are such that the top end of the hammer
98 will always pro3ect above the top of the barrel 84.
The hammer lift assembly 17 as shown in Pigs. 5, 7
and 9 includes an upright hydraulic jack 100 having the lower end
of its cylinder supp~rted on a bracket 101 mounted on the barrel
84 and having its piston rod 102 extended through a pin 103 pro- -
jecting xearwardly from the top end of ~he hammer 98. The '
piston rod 102 has rubber grommets 104 therearound on opposlte
sides of the pin 103 and nuts 105 threaded on the rod 102 clamp -
these grommets relative to the top and bottom sides of the pin 103.
- A second pin 106 extends laterally through the top end ~ ;
of the hammer 98 and tension springs 107 are suspended from the
ends of this pin 106, straddling the support sleeve 80 and barrel
84 and pinned at their lower ends to links 108 which in turn are
pivotally mounted on laterally exl:ending supports 109 welded to
the barrel flange 88.
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To provide a rest position for thc hammer causing it
to follow the carriage as it is raised and lowcred, bumpers 110 of
resilient material are mounted on support:s 111 carried on a top
flange 84a OI the barrel 84 to receive the pin 106 the~eagaint.
S The springs 107 hold the pin 106 against the bumpers 110 in the
idle position of the hammer but in the operating position the
carriage down-crowds the anvil head 90 against the work piece to
compress the spring 94 so that the hammer 98 will strike the
anvil head before the pin 106 reaches the bumpers 110. The pin
106, of course, extends fxeely between the legs 85 carried by tlle
barrel 84.
As shown in ~ig. 7, the lift jack 100 has the piston
rod 102 extending into the jack cylinder to a piston head 112 and -
pressured fluid from a feed pipe 113 is fed into the cylinder under
the piston 112 and is relieved from the cylinder through a dis- ~ -
charge pipe 114. In addition an air conduit 115 is provided at the
upper end of the cylinder 100 to receive air from the cylinder
above the piston 112 as the piston is raised in the cylinder.
Thus, when fluid is forced into the cylinder below the pisl:on 112,
air will be forced into the air line 115. Conversely, when fluid
is dumped from the cylinder under the piston 112, the stretched
springs 107 will impel the hammer to deliver its blow against the
anvil head 90 and at the same time air will be sucked from the
air line 115 into the cylinder above the piston 112.
If desired, the hammer housing and anvil support 16
and the h~draulic mechanism 17 can be replaced with a self~con-
tain~d driv~ tool ~uch as a standard air, hydraulic, elec~ric or
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gas-driven hammcr or breaker tool. To this end, thc sleeve 80
is opened up hy removal of the bolts 83 and the pin P is removed
permitting l-emoval of the barrel 84 and the barrel carried com-
ponents. Then, for example, the barrel or housing of a standard
S air hammer or breaker tool can be clamped in the sleeve 80 and
pinned to the carriage base 78. The barrel or housing oP the
standard air hammer ~ool suspends the spring-loaded anvil sleeve
89 so that the anvil 90 will be impacted by the hammer or other
driven impact members in the driver tool. The power for driving
this type of tool can be supplied from any suitable source such as
an air compressor which may be mounted on the vehicle 11. The
carriage 15 can be down-crowded to lower the anvil head against
the work piece or against a tool such as a breaker chisel to be --~
driven by the hammer.
The compressing of the spring 94 by the weight OI the
driver tool and the down-crowding load applied thereto fr~m the
carriage 15 will, as explained above, not only maintain the anvil
head against the work piece or breaker, but will continue to load
the work piece or tool and avoid the "pogo stick" recoil encountered
with hand manipulated air hammers or jacks. The stanchion post ~ -
65 will, of course, rest on the surface being impacted by the
~:ork piece or breaker tool and will be positioned at a controlled
attitude relative to this surface for guiding the direction of the
driving of the work piece or tool.
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As shown in Fig. 20, a supply tank 116 feeds hydraulic
fluid to a main pump 117 driven by an auxiliary engine E. This
engine and the tank 116 are supported on the outer mast 36 of the
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pedestal mountin~ for tl~e derrick a~sembly 12 as shown in I~ig. 1.
A second hydraulic pump 118 is also clriven by the engine E. The
pump 117 has a large capacity of about 26 gallons per minu~e and
is used exclusively for the hydraullc lift mechanism 17. The pump
118 may have a smaller capacity of about 7 gallons per minute and
serves the hydraulic derrick assembly 12, the tilting and rotating
hydraulic controls for the stanchion 14 and the carxiage mechanism
15. :
A supply conduit 119 from the pump 118 feeds the
manifold of a valve bank 120 containing six valves 120a through
120f, each con~rolled by a separate hand lever 121 from the
operator's station 18 which as described above in connection with - '
the derrick system 12, is mounted on the outer mast or sleeve 36.
This operator station 18 includes an operator's seat 122 shown in
Fig. 1 and a console 123 shown in ~igs. 2 and 3 in front of the
seat 122. As shown, two of the hand levers 121 have depending
arms 124 connected by links 125 to cranks 126 independently
rotatable on a console carried cross shaft 127. Each crank 126
is connected through two links 128 to two foot pedals 129 and 130.
One pedal is depressed to lift a link 128 while the other pedal is
depressed to lower a link 128 thereby rocking each crank 126 in
opposite directions to pull and push the valve levers 121. The
arrangement is such that the levers 121 having these foot pedal ,f;
connections can be manipulated by the feet of the operator leaving
his hands free to manipulate the other control levers 121.
As shown in Fig. 20 the valve 120a supplies
prc~suri~ed fluid through a conduit 131 to the hydraulic motor 68
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which drivcs the sprocket 66 and cl-ain 72 for controlling thc down-
loading of thc c~rriage ~ssembly 15. Fluid from the motor 68 is
discharged back to the valve through the conduit 132 on this down-
load cycle. The valve 120a car. be reversed to feed fluid through
the conduit 132 for reversing the motor 68 to raise the carriage
assembly. A bleeder valve 133 at the operator's station 18 is
manually controlled to bleed pressurized ~luid from the conduit 131
back to the tank 116 for accurately controlling the downward load-
ing of the carriage assembly 15.
The valve 120b controls flow of fluid through conduits
134 and 135 to the hydraulic motor 49 for controlling the direction
of rotation of the motor drive sprocket 48 thereby controlling the
direction of rotation of the head 50 on the end of the boom 42.
The valve 120c controls flow of fluid through conduits --
136 and 137 to the hydraùlic jack 43 for driving the boom ~2 in
both directions into and out of the boom 39 thereby co~trolling
the effective length of the derrick assembly 12.
The valve 120d controls fluid through conduits 138 and - ~ -
139 to drive the motor 37 in opposite directions ther~y controlling - -
the direction of rotation of the outer sleeve or mast 36 and thus - ~ --
controlling the direction of the derrick booms 39 and 42 relative
to the vehicle 11. ~ -
The valve 120e controls fluid flow through the conduits
140 and 141 to control the jack 54 for tilting the stanchion ~ower
14 about the pivot 52.
The Yalve 120f controls t-ydraulic flow through conduits
142 and 143 to actuate the boom li~ing jack 41 in both dircction~
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including a down-loading of the boom.
~rom the above descriptions, it will be understood that
the pump 118 supplies the hydraulic fluid through the valve bank
120 for supplying hydraulic power to all of the hydraulic compon-
S ents with the exception of the hammer lift mechanism ]7. This
pump 118 is driven whenever the auxiliary engine E is operated
in order that hydraulic power will be available to manipulate the
derrick 12, and the devices for positioning the tool assembly 13
relative to the derrick assembly. On the other hand, the high-
flow capacity pump 117 is only driven when the hammer is in
operation and therefore a clutch 144 is provided between the
engine 1~ and the pump 117. This clutch can take the form of a
loose belt pulley drive where the belt is tightened whenever it is
desired to drive the pump 117.
The pump 117 supplies hydraulic fluid under pressure
through the conduit 113 feeding the bottom end of the hydraulic
lift jack 100 as explained hereinabove. This fluid is then returned
through the discharge conduit 114 under the controi of the dump ~,
valve 61 described above.
A by-pass valve 145 is provided in the conduit 113
ahead of the lift jack 100 to by-pass fluid back tO the tank 116
through a return conduit 146. The valve 145 is controlled by the
spring loaded anvil 89 by a link 147 attached to the flange 91 of
the anvil sleeve 89 so that fluid is by-passed from the feed conduit
2S 113 to the return conduit 146 until the anvil is loaded againsl: a
work piece W. P, by down-crowding the carriage assembly 15 to
compress the anvil spring 94 and thus hold the anvil head
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.
10449~5
constanEly against the work piece as described hereinal)ove, ~y-
passed fluid in ~he return conduit 146 flows through a check valve
147 into the return conduit 114 back to the tank 116. The check
valve 147 is downstream from the dump valve 61.
S Air flow into and ou~ of the top end of the lift jack 100
above the piston, as explained above, is accommodated through the
air line 115 which, as shown in Fig. 17, communicates with the
return conduit 146 which extends to a check valve 148 on the top
of the tank 116. The check valve 148 opens to admit air from
the tank into the top of the jack 100 on the downstroke of the jack
but locks air in:the conduit 146 on the upstroke of the jack,
thereby forcing this air through the check valve 147 into the return
conduit 114. The tank 116 is thus maintained under an elevated
pressure and the conduit 114 will be loaded with air downstream -
1~ from the dump valve 61 so that when this valve is open, the ~ -
dumped fluid from the bottom of the lift jack 100 will discharge
~, ,.,...~ ..
against an air cushion to lessen surging and shock loads on the -~`
fluid conduits. The air cushioning effect is obtained without any
added component since it is developed by the same hydraulic jack
100 that is used to lift the hammer 98 and stretch the springs 107.
In order to facilitate accurate control of the attitude of
the stanchion tower 14 from the operator's station at the console
123, as shown in ~igs. 2 and 17, a sighting device 149 is mounted
on the console of the operator's station and this device cooperates
with a tilt switch 150 mounted on the front end edge of the
stanchion post 65. ~ -
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1~4~4~S
As sl~own in Figs. 12 and 13, this til~ switch 150 has
a plastic casing lSl with a domed top from which is suspended a
heavy metal ball 152 by means of a metal fle~ le wire or cable
153.
The side wall of the casing 151 carries four electrical
contacts 154 surrounding the ball 1$2 with each contact being
connected through a wire 155 with a light bulb 156 in the sighting
device 149. Electrical energy from a suitable source such as a
battery B supplies current to the ball 152 through a wire 157 and
the cable 153. When the ball 152 swings to engage a contact 154,
current flows through the wire 155 of this contact to the filament
in the corresponding bulb 156 and then flows from the filament
back through a wire 158 to the battery B.
One pair of contacts 154 is aligned transversely of the
lS stanchion post 65 to be engaged by the ball when the post is tilted
laterally. The direction of tilt is that indicated by one of the
laterally arranged light bulbs 156. The other set of contacts 154
is aligned so as to be engaged by the ball 152 when the stanchion
post 65 is tilted forwardl~- or rearwardly and these contacts in
turn energize the top and bottom light bulbs 156 in the sighting
device 149. Thus, the operator has an immediate reading of the
lateral or longitudinal tilt of the stanchion and can easily manipu- ~
late the valve 120b to actuate the hydraulic motor 49 for correct- -
ing lateral tilt or the valve 120e to actuate the jack 54 for ~ ~
controlling front and rear tilt of the stanchion post. ~ -
As shown in Figs. 14 and 15, the stanchion post 65
carrie~ a removable collar 159 beyond the rear edge ~hereof to
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S
rcceive the work piece W, P. This collar is sl~pported from a
rearwardly projecting cye socket 160 projccting rearwardly from
the rear corner of the post 65 and similar eye sockets 161 on the
side walls of the post laterally of the socket 160 but at a lower
level. The work piece post guide collar 159 has a cylindrical
bore of sufficiently large diameter to accept removable bushings
162 witll variably sized internal diameters and shapes for slidably
receiving work pieces of different sizes and shapes. The collar
has a top leg 163 adapted to overlie the socket 160 and side legs
164 adapted to overlie the sockets 161. The ends of these legs
163 and 164 are apertured to accept connector pins 165 which
extend through the sockets and mount the guide collar 159 in a
horizontal plane rearwardly from the lower end of the staltchion
post 65.
The guide collar 159 is thus easily mounted on and
removed i~om the stanchion post 65 and can accept bushings of
different internal diameters and sizes to slidably guide work pieces
adjacent the ground level. With the upper end of the work piece
also mounted in the anvil sleeve 89, the work piece is thus held
parallel with the stanchion post 65. -
Fxom the above descriptions it will be understood that
the driving machine 10 of this invention, being mounted on a mobile
vehicle 11 can be driven to the work site with the derrick 12 and
driving tool 13 at a low-level carry position shown in dotted lines ; -
in Fig. 1. In this low-lcvel position, the boom 42 is firmly
seated in the support 23 of the frame 22 and the iree end of the
stancl]ion 14 i~ Ruspended in the s~rap 24. At the work site the
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derrick boom 42 is cxtendcd from the boom 43 to retract the
stanchion 1~ from thc strap 24 and the dcrrick is ~hen raised and
swung to position thc stanchion 14 at the exact spot where thc work
piece is to be driven.
It is pre~erred to down-load the derrick to hold the foot
plate 73 of the stanchion post 65 tightly against the ground, wall or
other surface to receive the work piece. The attitude of the
stanchion relative to the ground is then carefully adjusted so that
the work piece will be driven in the exact desired direction. Next,
the carriage assembly 15 is raised on the stanchion post 65 so
that the upper end of the work piece can be inserted in the anvil
sleeve 89 with the anvil head 90 resting on top of the work piece.
The carxiage is then powered downwardly on the stanchion post 65
to compress the coil spring 94 of the anvil thereby closingthe by-
pass valve 145. Hydraulic fluid then flows into the lower end of
the lifting jack 100 to raise the hammer 98 on its guide barrel 84.
The dump valve 61 is driven by the electric motor 57 at
an exact speed controlled by the operator from a rheostat R or
the like current regulator mounted on the console 123. The motor
57 could also be hydraulically driven with a bleeder control such
as the control 133 for the motor 68. When the valve is closed,
fluid will flow under the piston in the lifting jack 100 to raise the
hammer and this lifting action will continue until the valve is
opened to dump the hydraulic fluid. The speed of rotation of the - -
dump valve thus controis the height to which the hammer is lifted
and cooperates with the speed of the pump 117 to create a desired i ~
impact rate for the h~mmer. ~ -
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l~J~7S
On thc li~ing strokc, the hammer stre~:ches the springs
107 and then when the dump valve 61 is op~ned thc liting forcc OIl
the hydraulic lifting cylinder 100 is released permitting the springs
and gravity to propel the hammer against the anvil Iléad 90 to
deliver its clriving blow to the work piece W. P.
During the lifting c~rcle, air above the piston in the lifr- .
ing cylinder 100 is compressed into the hycll-aulic fluid return con- .....
duit downstream from the dump valve 61 so that on the next
succeeding dumping of the fluid, an air cushion will be provided to
minim shock loads in the conduit.
After the hammer delivers its impact blow against the
anvil to drive the work piece into the ground, the hydraulic load
on the carriage 15 is maintained at a sufficient level so that the
carriage will be down-crowded to follow the work piece and cause :
the anvil head 90 to remain in contact therewith Any lag in this
down-crowding follow-up will be accommodated by the compression
spring 94 which can elongate from its compressed condition to
maintain the anvil head aga.inst the work piece during the follow-up
movement of the carriage. The down-crowding load is controlled .
by the bleeder valve 133. ~; -.
The vehi~le 11 stabilized against a lateral tilt as when
the derrick operates the driving tool laterally of the vehicle body
without resortmg to the use of outriggers, by the stabilizer arms
30 secured to the ends of the rigid rotating tube 29 carried by the
vehicle frame. These stabilizer arms prevent flattening of the
vehicle springs 27 on one side of the vehi.cle more tharI on the
other side but operate in unison to accommodate spring suspen~ion
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'75
of the rear wheels of ~:hc vehicle.
While the driving tool 13 is especially adapted for
driving posts into the ground, it is also useful ~o pull work pieces
from the ground as shown in Fig. 16 by anchoring a cable C
S around the work piece W.P. and attaching the cable to tbe flange 88
of the barrel 84 whereupon the carriage assembly 15 can be
powered to lift the barrel 84 to pull the work piece W~ P.. out of
the ground.
Instead of driving work pieces into the ground or pulling
work pieces from the ground, the tool 13 is also useful to drive
demolition tools into pavements, walls, abutments and the like.
Thus the derrick can be manipulated to carry the tool 13 to an
overhead position and press the stanchion foot 73 against a wall,
abutment, or the like. A demolition tool such as a chisel can be
fitted in tbe anvil sleeve 89 in place of the work piece W. P. to be - - -
impacted by the hammer 98 for driving, causing the wall or the like
to collapse away from the vehicle. Likewise, the stanchion 14 can
be manipulated to extend at an angle relative to the surface to
receive the work piece, th~reby driving the work piece in any
desired direction.
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