Note: Descriptions are shown in the official language in which they were submitted.
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BACKGROUND OF THE INVENTION
The invention concerns a device for inserting and
centering associated screw-in pipes, as defined in the pre-
amble of Claim 1.
Such known devices are provided with handles near
the open end of the jaws. When the jaws are closed, the
handles subtend an acute angle and point to the operator.
The closure means is separately made in the form of a drop
latch. This design suEers from the drawback that when open-
ing the closure means, the engagement must be loosened
around one of the handles, which, in view of the devices most
of the time being rather heavy, can become problematical.
Another drawback is that, after the jaws are opened, the
device can only be removed toward the rear as seen by the
operator, whcreby one hand mu~t be left Eree and only the
1~ other hand 1~ available to hold the heavy dev:Lce. Where
~pace perm-Lt~, th~ opcrator also may stand on the side
opposite the closure mean~, in which case, however, the
hand:Les can only be se:L~ed wLth dlfEiculty becau~e they are
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on the opposite side and pointing away from the operator.
Furthermore, operating the closure means is also rendered
more difficult.
OBJECTS AND SUMMARY OF THE INVENTION
It is the object of the present invention to so
improve the device defined in the preamble of the Claim 1
that handling is made easier thereby.
This problem is solved by the characteristics
of the design as stated in the Claim 1,
The especial advantage of the solution oE the
invention is that one of the handles is simultaneously
designed to be a part of the closure means, As a result,
the required change of hands in the known device is
eliminated and accordingly the device can always be fully
held with both hands, Moreover, the design of the inven-
tion permits operation of the device from the hinge sidein such a manner that the device can always be applied
from the front and can always be removed toward the front.
~lereby, handling is ~substantially facil.itated, This de-
vice is e~pecLally suLted for pipes of lesser diameters`
whercby 9ing:1.e~man operatLon is wholly feasLble, Pipes of
larger diameters requlre correspondingly larger devices
demandlng more than one-man operatlon,
A clevice Eor handling such pLpes oE larger c'ia-
meters Ls stated in Claim 8. This device is designed in
such a manner that two operntors can handLe it, also being
assured to pLpes of very lar~e diam~ers. The especial
advantage oEEered thereby i9 that one oE the handles is
designed to be part of the closure means, Consequently,
the operation oE the quite heavy device is made appreciably
easier,
Ad~antageous and appropriate furt,her development.s
of the embodiments of the Claims 1 and 8 are stated in the
~urther claims, If, furthermore, the handle of the other
jaw, which is close to the closure means, is also designed
to be an opening means Eor the closure, as stated in Claims
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12 through 14, then an additional advantage is that the
device of the invention can be opened from each side.
This advantage is especially significant when the heavy
device of the invention hangs from a cable, as it often
does in practice, so tha~ the device can be opened from
the side nearest the operator who no longer has to change
sides.
The invention is discussed below in further
detail in relation to the enclosed drawings showing
illustrative embodiments.
DESCRIPTION OF THE DRAWINGS
FIGURE 1 is a perspective of a first embodiment
of the device of the invention when in the open state,
together with two pipe ends to be joined;
FIGURE 2 is a topview of the device of the in-
vention o~ Figure 1 when in the closed state;
FLGURE 3 is a sideview of the device oE F:igure1 looking onto the closure means; FIGURE 4 is a sideview oE a second embodiment
of the device of the inventiGn, looking onto the closure
means;
FIG~RF, S is a topview oE the device oE Flgure 4;
FIGUR~ 6 is a third embodiment oE the device of
the invent:Lon, seen ln topvlew; and,
FIGIIRE 7 :Ls a ~ourth ~rnbod~ment of the device of
the invention, seen in topvLew.
The drawlng of Figures 1 through 3 sho~7s an
:Lnsertion and centering device Eor as~ociated screw-in
pipes 30, 32, in particular for sinking pipes. The
device comprises two semi-cylindrical jaws 4, 20 jointly
articulating by means of a hinge or joint 36. Annular
projections 42 and 44, each with a dow~lward annular shoulder
46 and 48, respectively, are provided on the cylindrical
inner surfaces 38, 40 of these jaws. The device rests by
means of this shoulder on the edge o~ the socket 34 of
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the pipe 32 while being assembled The jaws are provided
at their upper ends with conically flaring parts 50 and
52, respectively, which join the projections. Handles 2
and 24, respectively, are mounted on the outside of the jaws
and approximately centrally.
The handle 2 of the jaw 4 is designed as part
of the closure means 6. For that purpose, the handle 2
pivots about an axis 54 and about the jaw. A rotatably
supported connecting rod 8 connects the handle 2 with the
one free end 14 o~ a double lever 12 which pivots about
an axis 56 and which is also mounted on the jaw 4. The
other free end 16 of the double lever includes a hook 18
which, :Eor the closed jaw position, overlaps a tooth 22
mo~mted on the other jaw 20, as best shown in Figure 2.
Preferably, the locking system 10 is designed to be of
the self-latching snap-in type.
When the two jaws are closed, the handles 2,
2~, are diarnetrically opposite each other.
In an alternative embodiment to the design sho~n
in the drawings, the handle 2 also can be made to be ro~
tati.onal about its horiæontal axl~ 26. In that case, it
ls not the pivot-lng but the rotatlonal motlon which is
transmitt~d to the locking system 10, :Lmplemente~ Eor
in~tance also by a bowden cable (omitted) in lieu o~ the
2S collnection rod 8.
The drawings show the components of the closure
mea~s 6 of the locking system 10 in the ~orm oE elements
mounted on the ~aws. The cLosure-means components (excep-
tion, of course, being made oE ~he handle 2), however, can
be designecl to be sunk in part or in whole into the jaws
(omitted).
The inserting and centering device for associated
screw in pipes shown in the drawings takes into account
optimal biotechnical factors. Obviously, the handles 2 and
24 can be mounted centrally, that is, diametrically when
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the closed position is achieved. Furthermore, they may also
be closer to the hinge 36. The design shown and described,
in any event, assures that the device can be applied from
~he front and can also be removed toward the front, whereby
its operation is substantially made easier.
The drawings of Figures 4 through 7 show an
insertion and centering device 1' for (omitted) associated
screw-in pipes, in particular ~or the sinking of pipes.
This device includes two semi-cylindrical jaws
2' and 4' connected together in articulating manner by a
hinge or a joint 6'. The cylindrical inside surfaces 8',
10' of these jaws are provided with annular projections
12', 14', each with a downward annular shoulder 16' and
18', respectively. By means o this shoulder, the device
rests on the edge oE the socket oE the pipe when in the
assembled state. The jaws are provided at their upper ends
with a conical flaring 20' and 22', respectively, joinlng
the said projections. Two handles 24', 26' and 28', 30',
re~pectively, are mounted next ~o each other in the cir-
cumerential direction on the outside o~ the jaws 2' and
4', and assume the shape oE balls. The bail 30' o~ the
jaw 4' Ls designed to be part oE a closure means 32'. To
that end, the baLl 30' ls mo~mted to be pivotable at :Lts
one end 34' about an axl.s 36'. A hook 40' is forrned at
2S the other end 38' oE the bail 30' and overlaps a tooth 42'
mounted on the other Jaw 2' when these jaws are closed, as
best shown Ln FLgures 5 through 7. PreEerably, the
clasure means 32' is designed to be selE-latchLng. The
end 38' of the bail 30' is made to pass through a U-shaped
or rec~angu:Lar eye 44' which acts as a guide means and as
a stop for the plvoting motion. A compression spring 46'
is mounted within the eye to load the pivoting bail 30'
towards the closed position.
In the embodiment shown in Figure 5, the bail 26'
of the other jaw 2' i8 adjacent the closure means 32' and
also is pivotable, providing a closure-means opener. To
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that end, the bail 26', just as bail 30l, is mounted in
pivotable manner by its one end 48' about a fulcrum 50'
on the jaw 2'. The other free end 52 ' of the bail 26'
passes underneath the outer end, i.e. the hook 40' of the
bail 30' in such a manner that bail 30' is moved by the
outward pivoting motion of the bail 26' from the closed
position into the open position. The end 52 ' of the
bail 26' also is made to pass through a U-shaped or
rectangular eye which acts as a guide. A compression
spring may be mounted also in this eye 54' to load the
bail 26' toward the closed position of the closure means
32'. ~lowever, such a spring is not mandatory.
Furthermore, the loading of the bail 30' and/or
26' can be implemented by using torsion springs mounted in
the vicinity of the fulcra 36' or 50'.
F'igure 6 shows a simplified design of the in-
serting and centering device. In this embodiment, the
bail 26' of Figure 5 is again designed to be a fixed bail
56', as are the bails 24' and 28'. Otherwise, the device
of Figure 6 is identical with that of Figure 5. The salhe
components Eor the two devices therefore are denoted by the
same references cmd the descr:Lption relating to Figure 5
should be considered for :Eurther accounts.
Flgure 7 shows a third embodiment oE the lnsert-
~.ng and centering dev:Lcc. The bail 30' of the devices oEFi~ures S and 6 i8 designed to be a spring-~teel bail 58'.
This spring-s~eel bail 58' ig rlgldly mo~mted at i~s end
60' to the jaw ~' and is loaded by its own stres.s in the
directlon o~ closing of the closure means 32'. In the
device of Fj.gure 7, the bail near the closure means 32'
also is deslgned to be a Eixed bail 56'. This bail 56',
however, may be de~signed also to be an elastic bail 62'
and may, like the bail 26' of Figure S, serve as a closure-
means opener. Otherwise, the embodiment of Figure 7
corresponds to ~he devices of Figures 5 and 6. Accord~
ingly, the components identical with those of the devices
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of Figures 5 and 6 are denoted by the same references
and to prevent unnecessary repetitions the descriptions
relating to Figures 5 and 6 should be considered.
The inserting and centering device of Figures
~ through 7 is intended especially for pipes of sub-
stantial diameters. As these devices are correspondingly
heavy, they require operation by two men and they must be
knocked around the pipe socket. In the embodimen~ of
Figure 6, the device can be opened only by means of the
one bail 30'. On the other hand, in the embodiment of
Figure 5, the device can be opened by either of the two
handles 30' or 26'. Due to the large weight of the device,
it will frequently be suspended ~om a cable and the
opening then can be implemented every time by one man from
the side closest to him.
