Note: Descriptions are shown in the official language in which they were submitted.
CA 022628~7 1999-01-12
Apparatus for the application of rivets, buttons or the
like
The invention relates to an apparatus for the
application of rivets, buttons or the like, having a
top tool and a bottom tool, the top tool being
preferably push-rod actuatable, and one tool executing
a yielding movement during the riveting operation.
An apparatus of the type in question is known, for
example, from DE 44 31 948 Al. The contents of this
patent application are hereby also included in full in
the disclosure of the present invention, also for the
purpose of including features of this patent
application in claims of the present invention. In this
patent application, there is described an apparatus in
which a top end of a push rod, which can actuate the
top tool, is spring-loaded against a circumferential
surface of a cam plate mounted axially on a drive shaft
of a motor. The rivets, buttons or the like which are
to be applied each comprise a top article part and a
bottom article part. These top parts and bottom parts
are stored in separate magazines and pass out of the
magazines, by way of feed rails, into the region of a
loading slide. The latter can be displaced horizontally
and is provided with a top push-in strip and a bottom
push-in strip. The top push-in strip brings in each
case one top article part into a retaining gripper
associated with the top tool, while the bottom push-in
strip moves the bottom article parts into the region of
the bottom tool, into alignment with respect to the top
part. The bottom tool is mounted such that it can be
pivoted on a pin, mounted in a mounting plate, sucn
that, for the purpose of riveting the top part and the
bottom part to a textile, the bottom tool engages
against the underside of the textile by way of the
bottom article part, which is disposed in the bottom
tool. The bottom article part is provided with teeth,
which act on the underside of the textile and pass
~0 through the latter. Depending on the thickness of the
CA 022628~7 1999-01-12
textile, the bottom tool can execute a yielding
movement to a greater or lesser extent against a
compression spring during the riveting operation, in
that it pivots out about the bearing pin.
As regards the abovedescribed state of the art, a
technical problem of the invention is to provide an
apparatus of the type in question which, while
maintaining the tried-and-tested basic form, is
distinguished by improved control possibilities,
correct riveting and high functional reliability.
This problem is solved first and foremost by the
subject matter of Claim 1, this being based on the fact
that the extent of the yielding movement is used for
the purpose of monitoring the riveting operation. As a
result of this configuration, there is provided an
apparatus for the application of rivets, buttons or the
like, of particularly straightforward construction and
high reliability. The riveting quality depends, inter
alia, on the depth by which the teeth of the bottom
article part penetrate into the flanged edge of the top
article part, which may be a spherical or resilient
part. In this case, predetermined dimensions, so-called
pinch-setting dimensions, are not to be exceeded. Upon
riveting of a top article part and bottom article part
into textiles with one or more layers, one tool yields
back to a greater or lesser extent in a spring-force
actuated pressure-compensation arrangement. The length
of the yielding-movement path may be used as a measure
of the strength of the riveting. Preferred in this case
is an arrangement in which the extent of the yielding
movement of the bottom tool is used for monitoring
purposes. By sensing the extent of the yielding
movement, there is provided monitoring which, for
example, by way of a display, informs the user as to
whether the depth by which the teeth of the bottom
article part penetrate into the flanged edge of the top
article part is sufficient. It may thus be provided
CA 022628~7 1999-01-12
that when a predetermined dimension is exceeded, a
fault signal is emitted. A configuration in which the
applying machine is stopped is preferred. Thus the user
is given a signal to check the riveting which has been
carried out and, if appropriate, to repeat it. In a
development of the subject matter of the invention, it
is further provided that the path of movement of the
bottom tool is sensor-monitored. In this case, it is
possible, for example, for a measuring sensor to be
provided on a pressure-compensation means of the bottom
tool, provided in the form of a spring assembly, which
measuring sensor is capable, in conjunction with an
evaluation circuit, of reliably indicating whether the
depth by which the teeth of the bottom article part
penetrate into the flanged edge of the top article part
is sufficient. This allows conclusions to be drawn as
to the pinch-setting dimension which is to be observed,
this pinch-setting dimension corresponding to the
spacing between top side and underside of the rivet or
the like, once riveting has taken place. It may
alternatively be provided that upon exceeding a
predetermined dimension, the bottom tool actuates a
switch. This switch may be formed as a contact switch
or a proximity switch. If the predetermined maximum
dimension is observed, then a switch which acts in the
path of movement of the bottom tool is not actuated.
The riveting is correct in relation to the permissible
pinch-setting dimension. If, on the other hand, for
example a multi-layered material whose thickness causes
the predetermined dimension to be exceeded is
processed, then the switch, which is directed into the
path of movement, is actuated by the bottom tool, for
example a contact switch is actuated by the bottom
tool. This switch actuation preferably causes the
applying apparatus to stop. The reliability of the
measuring equipment depends to a great extent on the
calibration following a tool/die change, following an
article change with the bottom article part having a
different tooth length, or following a flanging
CA 022628~7 1999-01-12
pressure adjustment. It is thus necessary to allow as
straightforward as possible a calibration, for example
by way of visual displays and with the aid of digital
setpoint generators. It is thus possible to provide,
for example, on the apparatus a scale or the like, with
reference to which the switch which monitors the bottom
tool may be aligned in accordance with the permissible
pinch-setting dimension. The invention also relates to
an apparatus of the type in question, the apparatus
having feed rails on which rivet or button parts are
conveyed. In order to achieve a reliable functioning
sequence, it is provided in this case that a sensing
device for the purpose of monitoring the movement of a
rivet or button part is associated with at least one
feed rail. This device senses the movement of the
articles sliding down after the article preceding them,
it being possible for sensing to take place, for
example, by means of a switch or the like which is
integrated in the feed rail. However, a configuration
in which each feed rail is provided with a light
barrier for the top article part and the bottom article
part is preferred. The article which slides down after
the article preceding it during an application cycle
produces a voltage pulse as it passes through the
light-barrier region, and this can be used, if there is
no pulse, to generate a fault signal. This fault can be
caused either by a part blocking or if the rivet supply
in the magazine and/or in the feed rail has been used
up. Accordingly, this device monitors not just the
presence of articles in the feed rails, but also the
movement of the articles in the feed rails. The
lastmentioned point in particular allows conclusions to
be drawn as to whether an article part has been removed
from the monitored feed rail in previous application
cycles. If this is not the case, then it is not
possible either for the following parts to slide down
after the part preceding them. There is no monitoring
pulse, which preferably causes the applying machine to
stop. For this purpose, there is further provided
CA 022628~7 1999-01-12
according to the invention that in the case of an
apparatus of the type in question in which the rivet or
button part is conveyed from the feed rail into the
path of a loading slide, the sensing device is disposed
in the feed rail such that it is spaced apart from the
loading slide by the extent of a plurality of rivets or
button parts. By virtue of this configuration, emptying
of the respective feed rail is counteracted. If a light
barrier is provided as the sensing device, then the
light beam is preferably aligned perpendicularly with
respect to the direction of movement of the article, a
light-passage opening being provided at a suitable
location in the preferably hardened feed rail.
Furthermore, the arrangement may be selected such that
feed rails are arranged to extend in parallel for the
various top article parts (spherical or resilient
parts), said feed rails being separate from the
magazines which store said parts. In order to ensure
reliable monitoring in this case, the two rails have to
be provided with a sensing device, preferably formed as
a light barrier. However, since it is only one top
article part or the other which can be processed in an
application cycle, then, accordingly, it is also only
the light barrier which is associated with the article
to be applied which is activated. One advantageous
development provides that, during each riveting
operation, the reaching of an end position of the
loading slide is monitored. Preferred in this case is a
configuration in which the front end position of the
loading slide is monitored. As a result, the path
between the feed rails and the riveting region, i.e.
the region between the top and bottom tools, is also
monitored. Should, for example, an article skew as it
is conveyed from the feed rails into the riveting
region by means of the loading slide, then the latter
does not reach its front end position. This end
position is monitored, for example, by a sensor or
switch which, if malfunctioning takes place, supplies a
signal, preferably for the purpose of switching off the
CA 022628~7 1999-01-12
apparatus. This configuration counteracts push-rod
actuation of the top tool if there are no articles in
the riveting region. Such no-rivet riveting could
result, for example, in damage to the textile. In the
case of an apparatus of the type in question in which
the riveting takes place by means of a push rod, it is
provided according to the invention that the push-rod
movement is monitored. It has proven advantageous in
this case, in particular, for the monitoring of the
push-rod movement to be effected by means of the
movement of a push-rod cam plate which actuates the
push rod. For this purpose, it is possible, for
example, for a sensor to "feel" the push-rod cam plate.
The monitoring of the push-rod movement is
advantageous, in particular, in relation to the feed-
rail monitoring, since it is only in a specific,
predetermined part of an application cycle that an
article is removed from the feed rail, and, going hand
in hand with this, the following articles slide down
after it. If the sensor or the like for the push-rod
monitoring senses that region of the push-rod cam plate
which is predefined for the feed rails, then an
evaluation unit expects the signal from the feed-rail
sensing device. If there is no signal from the latter
device in this region, then this results in the
apparatus shutting down. When the predefined region of
the push-rod cam plate moves away from the sensor for
the push-rod monitoring, then the feed-rail sensing
devices are deactivated. The time dependence between
the feed-rail signal and the control signal at the
push-rod cam plate is established by the position of
the light barrier with respect to the article in the
feed rail, a minimum distance of 30~ of angle being
prescribed in this case. In a preferred embodiment, it
is provided that a control switch is disposed on the
push-rod cam plate. Said control switch may be provided
in the form of a control clock-pulse switch which feels
the push-rod cam plate, for example, over its
circumference, the cycle-appropriate signal from the
CA 022628~7 1999-01-12
feed-rail monitoring device being monitored in relation
to the push-rod movement. The abovedescribed control
and monitoring devices may be used both individually
and in combination in an apparatus of the type in
question.
Hereinbelow, the invention is explained further with
reference to the attached drawing, although the latter
illustrates just two exemplary embodiments. In the
drawing:
Fig. 1 shows the apparatus in a side view, partly
broken away, in a top dead centre position of
the push rodi
Fig. 2 shows a detail of the apparatus according to
Fig. 1 in the region of the bottom tool and of
the top tool, likewise in the top dead centre
position of the push rod;
Fig. 3 shows a front view of Fig. 1, magazines for
storing article parts being illustrated;
Fig. 4 shows an illustration corresponding to Fig. 1,
but with tools assuming the riveting position;
Fig. 5 shows a detail of the apparatus according to
Fig. 2, but relating to the position according
to Fig. 4;
Fig. 6 shows a greatly enlarged illustration of a
rivet applied to a textile;
Fig. 7 shows a further detail enlargement from Fig. 5,
illustrating correct riveting, an extension arm
which controls the bottom tool releasing a
control switch;
. ~ ~ .. . ..
CA 022628~7 1999-01-12
Fig. 8 shows an illustration corresponding to Fig. 7,
but with riveting which, as a result of an
excessively thick textile, has not been carried
out correctly, the extension arm of the bottom
tool actuating the control switch;
Fig. 9 shows in perspective, partly sectioned
illustration, an enlargement of the detail of
the region of the feed rails leading from the
magazines to the apparatus;
Fig. 10 shows an illustration corresponding to Fig. 2,
but relating to a second embodiment for
monitoring the bottom tool;
Fig. 11 shows an illustration corresponding to Fig. 5,
but relating to the exemplary embodiment
according to Fig. 10; and
Fig. 12 shows an illustration corresponding to Fig. 11,
but with riveting which, as a result of an
excessively large textile thickness, is
incorrect.
The apparatus, which is provided in the form of a
machine, has a vertically aligned stand 2 carried by a
foot plate 1. Said stand is the carrier for a mounting
plate 3, which is in the form of a U which has been
tilted through 90~ in the anticlockwise direction and
of which the bottom U-leg constitutes an extension arm
4.
At its free ends, the extension arm 4 holds a bottom
tool 5. The latter has a cross-sectionally circular
anvil 6, the top end of which receives a bottom article
part 7.
The bottom article parts 7 are stored in a magazine 8,
which is arranged to the side of the mounting plate 3
.
CA 022628~7 1999-01-12
,
and from which a feed rail 9 extends obliquely
downwards in the direction of the extension arm 4. The
bottom article parts 7 are retaining parts which are
provided with teeth and may be connected to two
different top article parts. A top article part 10 is
shown in the illustrations. This serves as a functional
part in the form of a spherical part and can be applied
with the bottom article part 7 to a textile 11. The two
differently configured top article parts (spherical
part and resilient part) pass out of magazines 12 and
13, which are located opposite the magazine 8, and
travel, by way of the feed rails 14 and 15, which are
associated with the respective magazines 12 and 13,
into the region of the loading slide 16.
The loading slide 16 can be displaced horizontally and
is provided with a top push-in strip 17 and a bottom
push-in strip 18. The top push-in strip 17 brings in
each case one top article part 10 into a retaining
gripper 19, while the bottom push-in strip 18 moves the
bottom article part 7 into alignment with respect to
the anvil 6 of the bottom tool 5. An electromagnetic
control means (not depicted) can be used to bring
either the one or the other top article part out of the
magazine 12 or 13, by way of the respective feed rail
14 or 15, into the movement region of the top push-in
strip 17.
In the initial position of the apparatus, the retaining
gripper l9 is aligned opposite the anvil 6 and is
carried by a sliding element, which is guided at the
bottom end of a push rod 20 which extends opposite the
bottom tool 5.
At its bottom end, the push rod 20 carries a top tool
21 which, in the top dead centre position of the push
rod 20 according to ~igures 1 to 3, terminates above a
receiving means for the top article 10, which receiving
CA 022628~7 1999-01-12
,
- 10 - '
means is disposed in the region of the retaining
gripper ~9.
At the top end, the push rod 20 carries a roller 22.
Under the action of a compression spring 23, the roller
22 engages against the circumferential running surface
of a cam plate 24. The latter is wedged on the drive
shaft 25 of an electromotive drive 26. Accordingly, as
the cam plate 24 rotates through 360~, the push rod 20
is displaced in the downward direction and in the
upward direction again to the top dead centre position.
Also secured on the push rod 20 is an extension arm 27,
which carries a control roller 28. An arm 29 of a lever
31, which is mounted on the mounting plate 3 about a
pivot pin 30, engages against the underside of said
control roller 28. In obtuse-angled alignment with
respect to the arm 29, the lever 31 forms an obliquely
downwardly directed lever arm 32, the end of which,
according to the position in Figures 1 to 3, runs
vertically and is there provided with a guide slot 33
in which a sliding block 34 engages. The latter is
connected to the carriage-like loading slide 16 which,
for its part, can be displaced in a machine-framework-
mounted carriage guide 35 during pivoting of the lever
31.
The bottom end of the lever arm 32 forms a control edge
36, on which a contact roller 37 is supported. The
latter is located at the free end of a control lever
38. This is mounted about a bolt 39 on the machine
framework. A tension spring 41 acts on a transverse arm
40 of the control lever 38 and loads the control lever
38 in the direction of an abutment position relative to
the lever 31. This goes hand in hand with the lever 31
being forced, by way of its arm 29, into an abutment
position relative to the control roller 28 of the push
rod 20.
.. . . .
CA 022628~7 1999-01-12
- 1,1 - .
Opposite the contact roller 37, the control lever 38
forms a control cam 42 which is disposed in the
vicinity of the bolt 39 and, for its part, cooperates
with a rotationally secured contact bolt 43, which is
guided in a laterally extending transverse arm 44 of
the transmission lever 45. The contact bolt 43 is
supported, by means of a transmission compression
spring 46, on an adjustable-thread counter-bolt 47 at
the bottom end of the transmission lever 45, which is
more or less of angled configuration. At the angle
point, the transmission lever 45 is mounted about an
extension-arm-mounted transverse pin 48. The free end
of the transmission lever 45 extends to beneath the
bottom tool 5. The transmission lever 45 engages in a
positively locking manner, by way of an angled element
49, in an annular groove 50 at the bottom end of the
anvil-like bottom tool 5. A restoring spring 51, which
acts in the vicinity of the counter-bolt 47, loads the
transmission lever 45 such that the contact bolt 43
thereof is supported on the control lever 38, to be
precise, and according to Figures 1 to 3, in the region
in front of the control cam 42.
A projection lamp 52 is used for precise application of
the article parts to the textile 11. Said lamp is
secured on the machine framework and produces a
reticule, for example on the top side of the textile
11 .
According to Figures 1 to 3, the push rod 20 assumes
the top dead centre position as a result of the
correspondingly rotated cam plate 24. A top article
part 10 has been transferred from the top push-in strip
17 to the retaining gripper 19, while the bottom push-
in strip 18 has introduced the bottom article part 7into the bottom tool 5.
Actuation of a foot switch 53 provided on the foot
plate 1 initiates the drive operation, in conjunction
.
CA 022628~7 1999-01-12
with a rotation of the cam plate 24 in the arrow
direction according to Figure 3, as a result of which
the push rod 20 is displaced in the downward direction.
Hand in hand with this, the retaining gripper 19 has
been displaced in the downward direction and,
accordingly, is located at a spacing from the bottom
tool 5.
Hand in hand with the downward movement of the push rod
20, the control roller 28 acts on the arm 29 of the
lever 31 and pivots the latter in the anticlockwise
direction, this taking place in conjunction with the
loading slide 16, and the push-in strips 17 and 18
positioned thereon, being carried along. During this
operation, the lever arm 32 of the lever 31 acts on the
contact roller 37 of the control lever 38 and pivots
the latter in the clockwise direction. In this case,
the contact bolt 43 butts against the control cam 42,
as a result of which the transmission lever 45 is
pivoted by the transmission spring 46, so that the
bottom tool 5 moves upwards more or less at the same
time as the retaining grippers 19 and the push rod 20
come to a standstill. Later on in the application
cycle, a second lowering movement of the push rod 20
and of the retaining gripper 19 causes the retaining
gripper 19 to be positioned on the top side of the
textile 11. The push rod 20, in contrast, moves further
downwards for the purpose of riveting the bottom
article part 7 to the top article part 10. In this
case, the teeth of the bottom article part 7 pass
through the textile 11 and penetrate into a flanged
edge of the top article part 10.
During this riveting operation, the bottom tool 5 can
execute a yielding movement, the extent of this
yielding movement depending on the textile thickness in
the riveting region. This yielding movement is made
possible by the non-rigid displacement of the
transmission lever 45. In this case, the transmission
CA 022628~7 1999-01-12
compression spring 46 acts as a pressure-compensation
means and is compressed in accordance with the extent
of the yielding movement.
Said yielding extent is used for the purpose of
monitoring the riveting operation. For this purpose, a
contact switch 54 is provided in the first exemplary
embodiment, which is shown in Figures 1 to 9.
The riveting quality essentially depends on the depth
by which the teeth of the bottom article part 7
penetrate into the flanged edge of the top article
part, which is formed as a spherical part or resilient
part. This penetration depth depends directly on the
textile thickness and the tooth length of the bottom
article part 7. Upon riveting, a predetermined
dimension, the so-called pinch-setting dimension, must
not be exceeded. This dimension encompasses the spacing
a between the top side and underside of the rivet 55
once riveting has taken place (see Figure 6 in this
respect). ~pon riveting the bottom article part 7 and
top article part 10 in textiles with one or more
layers, the bottom tool 5, and the transmission lever
45 connected to it, yield back to a greater or lesser
extent. The extent of this yielding-movement path may
be used as a measure of the strength of the riveting.
The abovementioned contact switch 54 is provided on the
mounting plate 3 in an adjustable manner. This makes it
possible for the contact switch 54 to be adjusted in
accordance with the maximum pinch-setting dimension,
for which purpose a scale or the like may be provided,
for example in the region of the mounting plate 3.
Figures 7 and 8 show in schematic illustrations,
riveting operations for two textiles of different
thicknesses. In Figure 7, a rivet 55 is applied to a
textile 11, the thickness of which is dimensioned such
that the predetermined pinch-setting dimension, which
CA 022628~7 1999-01-12
- ~4 - ,
is selected in dependence on the tooth length of the
bottom article part 7, is observed. In this case, the
bottom tool 5 and the transmission lever 45 yield back
only to a very small extent, if at all, with the result
that the monitoring contact switch 54 provided is not
actuated by the transmission lever 4 5. There is no
signal.
In contrast, the textile 11 which has been selected in
Figure 8 has a thickness which, if the same bottom
article part 7 as in Figure 7 is used, causes the
predetermined dimension to be exceeded. The bottom tool
5 and the transmission lever 45 yield to such an extent
that the contact switch 54 is actuated. This actuation
causes a signal which may be used for example by an
evaluation circuit, in order, by means of a visual
display, to indicate to the user that incorrect
riveting has taken place. Preferred in this case is a
configuration in which the signal causes the apparatus
to shut down, so that the riveting which has been
carried out may be checked and, if appropriate,
repeated.
As an alternative to the contact switch 54, it is also
possible to use measuring sensors, proximity switches
or the like. This makes it possible to allow as
straightforward as possible a calibration by means of
visual displays and with the aid of digital setpoint
generators. This is important, in particular, since the
reliability of the measuring equipment depends to a
great extent on the calibration following a die change,
an article change with a different tooth length, or
following a flanging pressure adjustment.
In the riveting position, furthermore, the loading
slide 16 has been displaced back to such an extent that
the push-in strips 17 and 18 are located in front of
the article parts fed in. In this position, the article
parts in the feed rails automatically slide down after
. .
CA 022628~7 1999-01-12
.
- 15 -
the article part preceding them, in each case one top
article part and one bottom article part being located
in front of the respective push-in strip. The operation
in which the article parts slide down after the article
part preceding them is prevented during the rest of the
cycle, since in this case the push-in strips and the
loading slide 16 are located in front of the feed-rail
openings and close off the same.
The movement of the articles in the feed rails sliding
down after the article preceding them is monitored
according to the invention by a sensing device 56. The
latter is in the form of a light barrier 57, a sensing
device 56 being associated with each feed rail 9, 14
and 15.
These sensing devices 56 sense the movement of the
articles sliding down after the preceding article as
soon as a application cycle has been initiated. In this
case, each application cycle produces a voltage pulse
by way of the articles sliding down after the article
preceding them within the region of the sensing device
56. This fact can be used, if there is no pulse, to
generate a fault signal. Such a fault can be caused
either by an article part blocking or if the article
supply in the feed rail and/or in the magazine has been
used up. Thus, there is monitored according to the
invention not just the presence of articles in the feed
rails, but also the necessary movement when, in a
drawn-back position of the loading slide 16, the
articles slide down after the article preceding them.
The light barriers 57, which form the sensing device
56, act more or less perpendicularly with respect to
the movement direction of the articles or with respect
to the alignment of the feed rails, the latter being
provided with passage openings 58 at the bottom for the
passage of the light beam through the feed rails 9, 14
or 15.
CA 022628~7 1999-01-12
- 16 -
As has already been mentioned, an electromagnetic
control means is used to activate and deactivate one or
the other magazine 12, 13, and thus the associated feed
rail 14 or 15. Hand in hand with this, the sensing
device 56 of the feed rail in operation at any one time
is also activated, so that it is possible to avoid
fault signals from the region of the deactivated feed
rall .
This -feed control also operates in dependence on the
push-rod movement. Provided in this case is monitoring
which is achieved by means of the movement of the cam
plate 24, which actuates the push rod 20. A control
clock-pulse switch 59 (merely schematically illustrated
in the drawings) is provided on the cam plate 24 in
order to render the signal from the sensing device 56
of the feed rails time-dependent and/or angle-dependent
in relation to the application cycle. The control
clock-pulse switch 59 transmits a signal, for example
to an evaluation unit, as soon as the drawn-back
position of the loading slide 16 is detected by way of
the cam plate 24. At this point in time, signals from
the activated sensing devices 56, caused by the
movement of the articles, are likewise transmitted to
the evaluation unit. The evaluation unit checks the
incoming signals and, in the case of fault signals,
preferably causes the entire applying apparatus to
stop.
As an alternative, it is also possible to use proximity
switches or sensors for the purpose of sensing the cam-
plate position.
The sensing devices 56 in the region of the feed rails
are positioned such that a measure of a plurality of
article parts is observed between the sensing devices
56 and the loading slide 16. This ensures that the feed
rails do not empty completely. There is always a
CA 022628~7 1999-01-12
residual quantity in the region between the sensing
devices 56 and the loading slide 16.
The operation of feeding bottom article part 7 and top
article part 10 into the region of the bottom tool 5
and top tool 21 is also monitored. For this purpose a
sensor 60, for example, is provided on the mounting
plate, and this sensor 60 detects the front end
position of the loading slide 16 and the associated
front end position of the lever arm 32. Should an
article part, for example, skew during the forward
displacement of the loading slide 16, then this results
in the loading slide 16 and lever arm 32 coming to a
standstill. Said lever arm thus does not reach the
region of the monitoring sensor 60, which, if
malfunctioning takes place, supplies a signal. This
signal preferably results in the applying apparatus
shutting down.
The abovedescribed monitoring devices may be used both
individually and in combination in the apparatus.
Furthermore, it is possible to monitor, in a cycle-
appropriate manner, the signals for the pinch-setting-
dimension monitoring and the loading-slide monitoring
in relation to the cam-plate position by means of the
control clock-pulse switch 59.
Figures 10 to 12 schematically illustrate a further
embodiment of an alternative configuration for the
pinch-setting-dimension monitoring. In this case, a
linear displacement of a disengagement part 61 is
brought about for the purpose of displacing the bottom
tool 5 into the riveting position by means of a control
cam 42. Arranged upstream of said disengagement part is
a transmission compression spring 62 which is oriented
in the direction of a transmission lever 63 and, at the
end located opposite the disengagement part, is
supported against a plate 69 on the transmission lever.
CA 022628~7 l999-0l-l2
- 18 -
Coaxially with respect to said plate 64, the latter has
integrally formed on it a signal finger 65, which
passes through the compression spring 62 and the
disengagement part 61. The free end region of said
signal finger 65 penetrates into the sensing region of
a sensor 66 provided on the machine framework.
Figure 11 shows a riveting position, in which, as a
result of the permissible textile thickness, the
predetermined pinch-setting dimension is observed. The
free end of the signal finger 65, which is connected to
the transmission lever 63 directly by way of the plate
64, has moved away from the sensing region of the
sensor 66. There is thus no signal.
The intention in Figure 12 is to apply a rivet to a
textile whose thickness causes the predetermined pinch-
setting dimension to be exceeded. The bottom tool 5,
and thus also the transmission lever 63, yield during
the riveting operation as a result of the excessive
textile thickness. The compression spring 62 is
compressed between the non-yielding disengagement part
61 and the plate 64 on the transmission lever. In
contrast, the signal finger 65, which is integrally
formed on the plate 64, is displaced in the direction
of the sensing region of the sensor 66, which in this
arrangement transmits a signal for switching-off of the
apparatus, or at least for indicating this to the user.
All the features disclosed are pertinent to the
invention. The disclosure contents of the
associated/attached priority document (copy of the
prior application) are hereby also included in full in
the disclosure of the application, also for the purpose
of adopting features of these documents in claims of
the present application.
