CZ999A3 - Rivet, knob or the like - Google Patents

Abstract

A device for setting rivets, buttons or the like has an upper tool (21) and a lower tool (5). The upper tool (21) can preferably be actuated by a tappet and one of the tools carries out an evading movement during riveting. In order to provide a device of this type characterised by an improved manoeuvrability, a correct riveting and a highly reliable operation, without altering the proven basic design, the extent of the evading movement is used to monitor the riveting operation.

Description

Technical field

The invention relates to a device for setting rivets, buttons or the like, which consists of an upper tool and a lower tool, the upper tool being preferably controlled by a slide and one of the tools performing a retraction movement during the riveting process.

State of the art

A device of this type is known, for example, from DE 44 31 948 A1. The content of this patent application is fully incorporated into the content of the present application, also for the purpose of incorporating the features of this application into the claims of the present application. This patent application describes a device in which the upper end of a slide acting on the upper tool is pressed by a spring against the peripheral surface of a cam disc which is axially arranged on the drive shaft of the motor. The rivets, buttons or the like to be inserted always consist of an upper part and a lower part. These upper parts and lower parts are stored in separate containers and are fed from these containers into the region of the loading slide by means of feed rails. The loading slide is displaceable in the horizontal direction and is provided with an upper insertion bar and a lower insertion bar. The upper insertion bar always moves one upper part of the insert into the holding pliers assigned to the upper tool, while the lower insertion bar brings the lower parts of the insert into alignment with the upper part in the area of the lower tool. The lower tool is pivoted on the mounting plate by means of a pin so that this lower tool rests on the underside of the fabric with the lower part of the insert, which is located in the lower tool, in order to rivet the upper part to the lower part. The lower part of the insert is provided with teeth which, when pressed against the underside of the fabric, penetrate through this • 9 ·

-2• 9 9 9 • 9 · · · 9

9 ··

9 99 textile. Depending on the thickness of the textile, the lower tool may perform a greater or lesser retreating movement during the riveting process against the action of the compression spring, which will be reflected by swinging around the bearing pin of this lower tool.

The task of the invention is, taking into account the described state of the art, to improve the design of the described device while maintaining the proven basic principles so as to improve the possibilities of checking correct riveting and increase the operational reliability of this device.

The essence of the invention

The above-mentioned task is solved and the shortcomings of known devices of this type are largely eliminated by a device for setting rivets, buttons or the like, which consists of an upper tool and a lower tool, the upper tool being preferably controlled by a slide and one of the tools performing a retreating movement during the riveting process, according to the invention, the essence of which lies in the fact that the magnitude of the retreating movement is used to monitor the riveting process. Thanks to this embodiment, a device for setting rivets, buttons or the like with an exceptionally simple construction and high reliability is achieved. The quality of riveting depends, among other things, on the depth of insertion of the teeth of the lower part of the inserted object under the peripheral rim of the upper part of the inserted object, which can be designed as a ball or spring element. The required dimensions, the so-called “pinch setting”, which is the mutual distance between the lower and upper sides of the rivet, should not be exceeded. When riveting the upper part to the lower part of an attached object, i.e. a rivet, button or the like, to a single or multi-layered fabric, the tool will retreat more or less against the force of the compensating spring. The path of the retreating movement can be considered as a measure of the strength of the riveting.

It is advantageous to design the device in which monitoring is performed using • ·

-3-step movement of the lower tool, practically so that the sensor monitors the path of movement of the lower tool. By determining the degree of step-back, a control is achieved, which, for example, gives the operator a signal via an indicator whether the depth of immersion of the teeth of the lower part into the peripheral rim of the upper part of the inserted object is sufficient.

A solution can be used in which the lower tool activates a contact switch when it exceeds a predetermined path, which issues a fault message. An embodiment in which the device stops in this case is advantageous. The operator of the device is thus instructed to check the riveting operation performed, or to repeat the riveting operation. The movement path of the lower tool is preferably monitored by means of a sensor. This measuring sensor can be arranged, for example, on the compensating spring of the lower tool. The measuring sensor is then able to reliably indicate, in cooperation with the evaluation circuit, whether the depth of insertion of the teeth of the lower part into the peripheral rim of the upper part of the inserted object is sufficient. This also allows a judgment to be made about compliance with the “pinch setting”, which corresponds to the mutual distance between the upper and lower sides of the rivet or the like after the riveting operation has been performed. Alternatively, a solution can be used in which the lower tool activates a switch after exceeding a predetermined retreating movement path. This switch can be designed as a contact switch or a proximity sensor. If the preset maximum distance is maintained, then the switch arranged in the path of movement of the lower tool is not activated. The riveting is correct in terms of the permissible mutual distance of the lower and upper sides of the resulting rivet. However, if objects, such as rivets, buttons or the like, are applied to a multilayer material whose thickness causes the preset retreating distance of the lower tool to be exceeded, a switch, such as a contact switch, arranged in the path of the lower tool is activated by this lower tool. As a result of the activation of this switch, the application device is preferably stopped. The reliability of the measuring apparatus depends to a large extent on the calibration after changing the tool or punch, after changing the applied object with a different length of the teeth of its lower part or after changing the pressure of the peripheral rim on the upper part • · • · • · ♦

-4 of the object being set. It is therefore necessary to enable calibration to be as simple as possible, for example by means of an optical display and digital adjustment elements. For example, a scale or the like can be provided on the device, with which a switch can then be set, which monitors the movement of the lower tool, according to the desired mutual distance between the lower and upper sides of the rivet being formed.

The invention also relates to the device already described, wherein this device comprises feed rails, through which rivet or button parts are conveyed. In order to achieve a reliable course of the riveting process, a solution is used here, consisting in at least one feed rail being provided with a sensing device for monitoring the movement of the rivet or button part. This sensing device senses the movement of the moving objects being inserted, whereby the actual sensing can be ensured, for example, by a switch built into the feed rail or the like. However, an embodiment is advantageous in which each feed rail for the upper parts and lower parts of the inserted objects is provided with a light barrier. During the insertion cycle, the moving objects generate voltage pulses when passing through the area of the light barrier, which can be used in such a way that a fault message is sent in the absence of a pulse. The said fault can be caused either by a part blocking in the feed rail or by the exhaustion of the rivet supply in the magazine and/or in the feed rail. This sensing device therefore monitors not only the presence of parts of the inserted objects in the feed rails, but also the movement of these parts in the feed rails. The latter fact in particular makes it possible to draw conclusions about whether a part of the inserted object was removed from the monitored feed rail in the previous insertion cycle. If this is not the case, the following parts cannot be fed in either. The monitoring pulse is omitted, which is advantageously used to stop the device.

The invention also relates to the device already described, in which a part of a rivet or button is introduced into the path of movement of the loading slide by a feed rail. Sensing • · • ·

-5·» · ·· · the device is arranged in the feed rail from the loading slide preferably at a distance corresponding to a plurality of rivet or button parts. This embodiment prevents the respective feed rail from running idle. If a light barrier is used as the sensing device, the light beam is preferably oriented transversely to the direction of movement of the parts of the inserted objects. A through-hole for the light beam is formed at a suitable location in the preferably hardened feed rail for this purpose. The device according to the invention can also be advantageously designed in such a way that the feed rails, which are separated from each other from the respective magazines, where the various upper parts of the inserted objects are arranged, for example the aforementioned ball or spring elements, are arranged parallel to each other. However, since only one or the other upper part of the inserted object can be processed in one insertion cycle, only the light barrier belonging to the upper part currently being inserted is activated.

Another advantageous embodiment of the device according to the invention consists in monitoring the reaching of the end position of the charging slide (16) during each riveting process.

A preferred embodiment is one in which the front end position of the loading slide is monitored. In this way, the path between the feed rail and the riveting area, i.e. the area of the upper and lower tools, is also monitored. If, for example, a part of the inserted object were to jam during the movement of the part from the feed rail to the riveting area using the loading slide, the loading slide would not reach its front end position. Reaching this end position is monitored, for example, by a sensor or switch, which in the event of a fault generates a signal, preferably to disconnect the entire device. This embodiment prevents the slide from pressing on the upper tool when the part of the inserted object is not in the riveting area. Such empty riveting could, for example, lead to damage to the fabric.

The invention also relates to a device of the type already described, in which riveting is carried out using a slide and the movement of this slide is monitored.

• ·

-6 It is particularly advantageous if the monitoring of the movement of the slide is carried out by monitoring the movement of the cam disc which controls the movement of the slide.

In practice, this can be done by arranging a control switch on the cam disc or by using a sensor to monitor the cam path. Monitoring the movement of the slide is particularly advantageous in connection with monitoring the feed rails, since the removal of parts of the inserted objects from the feed rails and thus the movement of the following parts only occurs in a certain, previously known interval of the insertion cycle. If a sensor or the like in the slide sensor detects a cam path area that is predefined for the feed rails, then the evaluation unit also expects a signal from the sensor devices of the feed rails. If no corresponding signals are received from the sensor devices of the feed rails in this interval, this leads to a stop of the entire system. As soon as the predefined area of the cam disc leaves the sensor for monitoring the movement of the slide, the sensor devices on the feed rails are deactivated. The time dependence between the signal from the supply rails and the control signal from the cam disc is determined by the position of the light barrier in relation to the parts of the objects being inserted in the supply rail. A minimum angular distance of 30° is used.

The signal from the sensing device on the supply rails is therefore monitored depending on the movement cycle of the slide. The above-mentioned control and monitoring devices can be used in the described device both individually and in combination.

Overview of images in drawings

The essence of the invention is further explained by non-limiting examples of its embodiments, which are described on the basis of the attached drawings, which show:

- in Fig. 1 in a side, partially interrupted view of the rivet setting device · 44 4 ·· 44 «44 ««44 4444

4444 44 4 4444

4 4444 4 4 4 4 « 444 444 • 44 444 4 4 • 4 4 44 444 44 44

buttons or the like according to the invention, with the slide in the top dead position; in Fig. 2 detailed view of the device of Fig. 1 in the area of the lower tool and the upper tool, with the slide also in the top dead position; in Fig. 3 a front view of the device of Fig. 1, showing the containers for storing parts of the inserted objects; in Fig. 4 a representation corresponding to Fig. 1, but with the tools in the riveting position; in Fig. 5 detailed polhed corresponding to Fig. 2, but showing the position according to Fig. 4; in Fig. 6 significantly enlarged detail of a rivet set on a textile; in Fig. 7 another detailed view enlarged from FIG. 5, showing correct riveting, with the boom operating the lower tool having released the control switch; in Fig. 8 detailed view corresponding to Fig. 7, but in the case where the riveting is not correct due to too thick fabric, with the boom of the lower tool resting on the control switch; in Fig. 9 enlarged section showing in perspective partial view the area of the feed rails leading from the containers to the device;

Fig. 10 shows a representation corresponding to Fig. 2, but showing the second

BB • ·

B B

B· BB

BB B·

-8 execution of lower tool tracking;

- Fig. 11 shows a representation corresponding to Fig. 5, but for the exemplary embodiment according to Fig. 10;

and

- in Fig. 12, an illustration corresponding to Fig. 11, but with incorrect riveting due to too great a thickness of the fabric.

Examples of embodiments of the invention

The device or machine for setting rivets, buttons or the like according to the invention consists of a vertically oriented stand 2, which is supported by a base plate T. On the stand 2, a mounting plate 3 is arranged, which has the shape of the letter U, rotated 90° counterclockwise. The lower arm of this mounting plate 3 forms a boom 4.

At the free end of the boom 4, a lower tool 5 is arranged, which contains a circular anvil 6 in cross-section, into the upper end of which the lower part 7 of the object to be inserted is inserted.

The lower parts_7 of the attached objects are previously stored in a magazine 8, which is arranged on the side of the mounting plate 3 and from which a supply rail 9 leads diagonally downwards towards the boom _4. The lower parts 7 of the attached objects are formed by holding elements which are provided with teeth and can be connected to two different upper parts of the attached objects. The drawings show the upper part W of the attached object. It serves as a functional part in the form of a spherical element and can be attached to the textile |1 together with the lower part 7. The two differently shaped upper parts IQ of the attached object, i.e. the spherical part and the spring part, are fed from magazines 12 and 13, arranged opposite to the magazine 8 and provided with supply rails 14 and 15, ·« · ·· · ♦ 9 *

9 9 9 · · • ·····♦· · • 9 9 9 9

9 . 99

99 99 • · · * ♦ « • 9 9 9 9

9,999,999

9 9

999 99 99

-9which lead to the area of the loading slide 16. The loading slide 1_6 is displaceable in the horizontal direction and is provided with an upper insertion bar 17 and a lower insertion bar 18. The upper insertion bar 17 moves the upper part 1_0 of the inserted object into the holding pliers 19, while the lower insertion bar 18 moves the lower part 7 of the inserted object into alignment with the anvil 6 of the lower tool 5. One or both upper parts W of the inserted object can be fed into the movement area of the upper insertion bar 17 from the magazine 12 or the magazine |3 by means of feed rails 14 or 15, their feed being controlled by control electromagnets (not shown),

In the initial position of the device, the holding pliers 1_9 are located in alignment with the lower tool 5 and are supported by a sliding stone, which is guided at the lower end of the slide 20, which is arranged opposite the lower tool 5.

The slide 20 carries at its lower end an upper tool 21 which, in the upper dead position of the slide 20 according to Figs. 1 to 3, ends above a seat for the upper part 10 of the inserted object, which is arranged in the area of the holding pliers 19.

The slide 20 is provided with a pulley 22 at its upper end. This pulley 22 is pressed by a compression spring 23 against the circumferential normal path of the cam disc 24, which is mounted on the drive shaft 25 of the electromotive drive 26. During the rotation of the cam disc 24 by 360°, the slide 20 is therefore moved downwards and again upwards to the top dead center position. A boom 27 is further attached to the slide 20, which carries the control roller 28. Against the lower side of the control roller 28, the arm 29 of the lever 31 projects, which is pivotably mounted on a pin 30 on the mounting plate 3. At an obtuse angle, the lever arm 32 of the lever 31, oriented obliquely downwards, continues to the arm 29, the end of which in the position according to Fig. 1 extends vertically and is provided at this point with a link 33, into which a link stone 34 engages. This link stone 34 is connected to the charging slide 16, which has the form of a sled and is displaceable when the lever 31 is swung • · · ·♦ • · ♦ · · · • 9 · · · · • ····#· · ♦ · · · · · · *♦ • · · · · ·« · ·♦· • · · ·« ··

- 10 in the slide rail 35 on the T stand side

At the lower end of the lever arm 32, a control track 36 is formed, on which a sensing roller 37, which is arranged at the free end of the control lever, rests.

38. This control lever 38 is mounted on a pin 39 on the mounting plate 3. A tension spring 41 engages with the transverse arm 40 of the control lever 38, which presses this control lever 38 against the lever 31, which is consequently pressed by its arm 29 against the control roller 28 of the slide.20.

Opposite the sensing roller 37, a cam track 42 is formed on the control lever 28 near the pin 39, which cooperates with a sensing pin 43, which is secured against rotation and is guided in a laterally projecting transverse arm 44 of the transfer lever 45. The sensing pin 43 rests on the lower end of the transfer lever 45, which is essentially designed as an angle, via a transfer compression spring 46 and in the thread of an adjustable counter pin 47. The transmission lever 45 is mounted at the top of its bend on a transverse pin 48 on the boom 4. The free end of the transmission lever 45 extends under the lower tool 5. The transmission lever 45, with its angle 49, engages in a shape with the annular groove 50 at the lower end of the lower tool 5, which is formed by the anvil 6. The return spring 51, which is attached near the counter pin 47, acts on the transmission lever 45 in such a way that its sensing pin 43 abuts on the control lever 38, according to Figs. 1 to 3 in the area in front of the cam track 42.

A projection lamp 52 is used to precisely position the parts 7, 10 of the object to be placed on the textile 11. This is attached to a stand and creates, for example, a crosshair on the upper side of the textile 11.

According to Fig. 1 to 3, the slide 20 assumes the upper dead position in connection with the respective rotation of the cam disc 24. The upper part 10 of the inserted object was transferred to the holding tongs 19 by the upper insertion bar 17, while the lower insertion bar 19 • 9 · • «4

4 4 4 · ····

4 4

9

99

9 9 9

4 4 4 « ·· 4 444

4

4«

-11 the bar 18 moved the lower part_7 of the inserted object into the lower tool_5.

By pressing the foot switch 53, which is arranged on the base plate, the drive is switched on, which is associated with the rotation of the cam disc 24 in the direction of the arrow according to Fig. 3, as a result of which the slide 20 moves downwards. As a result, the holding pliers 19 also move downwards and stop at a certain distance from the lower tool 5.

As a result of the downward movement of the slide 20, the control roller 28 rests on the arm 29 of the lever 31 and deflects this lever 31 counterclockwise, which is associated with the entrainment of the charging slide 16 with its insertion strips 17 and 18. The lever arm 32 of the lever 31 acts during this process on the sensing roller 37 of the control lever 38 and deflects this control lever 38 in the clockwise direction. The sensing pin 43 then rests on the cam track 42, as a result of which the transfer lever 45 is swung out by the transfer pressure spring 46, so that the movement of the lower tool 5 occurs approximately simultaneously with the stopping of the holding tongs 19 and the slide 20. During the further process within the application cycle, the repeated movement of the slide 20 and the holding tongs 19 downwards causes the holding tongs 19 to rest on the upper side of the fabric 11. The slide 20, on the other hand, moves further downwards in order to achieve riveting of the lower part 7 with the upper part 10 of the article being applied. The teeth of the lower part Ί of the article being applied pierce the fabric 11 and slide under the peripheral rim of the upper part 10 of the article being applied.

The lower tool J5 can perform an evasive movement during this riveting process, the size of this evasive movement depending on the thickness of the fabric 11 in the riveting area. This evasive movement is made possible by a non-rigid displacement of the transmission lever

45. Pressure compensation is provided by the transfer compression spring 46, which is compressed to an extent corresponding to the evasive movement.

-12• φφφφφ φφφ φφ φ

φφ φφ φ φ φ φ φ φ φ φ φφφ φφφ • φ φφ ··

The said certain evasive movement is used to control the riveting process. For this purpose, in the first embodiment shown in Figs. 1 to 3, a contact switch 54 is used.

The quality of riveting depends primarily on the depth of insertion of the teeth of the lower part J of the inserted object under the peripheral rim of the upper part 10 of the inserted object, which is designed as a ball or spring element. This insertion depth is directly dependent on the thickness of the fabric 11 and the length of the teeth on the lower part 7 of the inserted object. When riveting, a certain amount must not be exceeded, which is given by the distance a between the upper and lower sides of the rivet 55 after riveting - see Fig. 6. When riveting the lower part 7 and the upper part 10 of the inserted object in single- or multi-layer fabrics 11, the lower tool .5 and the transmission lever 45 connected to it will retreat more or less. The amount of this retreat can be considered a measure of the strength of the riveting.

The aforementioned contact switch 54 is arranged in an adjustable manner on the mounting plate 3. This makes it possible to adjust this contact switch 54 according to the maximum distance between the upper and lower sides of the rivet 55; for this purpose, for example, a scale or the like can be provided on the mounting plate 3.

Fig. 7 and 8 schematically show the riveting of two fabrics H of different thicknesses. According to Fig. 7, a rivet 55 is applied to a fabric 11, the thickness of which is such that a predetermined distance is maintained between the upper and lower sides of the rivet 55, which is selected depending on the length of the teeth on the lower part of the object to be applied. The lower tool 5 and the transfer lever 45 do not move back or move back only slightly, so that the control contact switch 54 used is not activated by the transfer lever. No signal is output.

According to Fig. 8, on the other hand, textile_1_1 is selected, the thickness of which, when using the same

-13• · · • · · • · · · • « · * · · • · ·

*« · ·· · of the lower part J of the inserted object as in Fig. 1 causes the aforementioned predetermined distance to be exceeded. The lower tool 5 and the transfer lever 45 retreat so much that the contact switch 54 is activated. This activation generates a signal which can be used, for example, by means of an evaluation circuit to provide the operator with a signal of incorrect riveting by means of an optical indicator. An embodiment in which the aforementioned signal causes the device to stop in order to enable inspection and possible repetition of the riveting already performed.

As an alternative to the contact switch 54, measuring sensors, proximity sensors or the like can also be used. This makes it possible to achieve the simplest possible calibration using optical displays and digital input elements. This is particularly important because the reliability of the measuring apparatus depends to a large extent on calibration after changing the punch, changing the inserted objects with different tooth lengths or after changing the pressure of the peripheral rim of the upper part.

In the riveting position, the loading slide 16 is also moved back so far that the insertion rails 17 and 18 are in front of the supplied parts 7 and 10 of the inserted objects. In this position, the parts 7, 10 of the inserted objects are automatically picked up in the feed rails 9, 14 and 15, whereby the respective part 10, 7 of the inserted object is always positioned in front of the respective insertion rail 17, 18. This movement of the parts 7, 10 of the inserted objects is blocked during the remaining part of the cycle, because the insertion rails 17, 18 or the loading slide 13 are in front of the openings of the feed rails 9, 14, 15 at this time and close these openings.

The movement of the moving parts _7, 10 of the inserted objects in the supply rails _9, 14, 15 is monitored according to the invention by a sensing device 56, which is formed by a light barrier 57, whereby each supply rail _9, 14 and 15 is provided with its own sensing device 56.

-14• · · • 4 4 4

4 * · · · 4

4

44 44 • 4 4 «« 4

4 4 4 4 « 44« »44 • 4 4

444 «4 44

These sensor devices §6 detect the movement of the moving parts_7,10 of the inserted objects as soon as the insertion process is started. Each insertion cycle causes an impulse in the sensor device 56 as a result of the displacement of the parts_7,10. This fact can be used to generate a fault message in the absence of an impulse. Such a fault can be caused either by a blocking of the part 2, IP or also if the supply of parts_7,10 in the supply rail 2,14,15 or in the magazine_8,12,13 is exhausted. In this way, according to the invention, not only the presence of parts 2,10 in the supply rails^,14,15, but also the desired movement when moving the parts_7,10 in the retracted position of the loading slide 16.

The light barriers 57, which form the sensing device 56, act approximately transversely to the direction of movement of the parts 7, 10, or transversely to the supply rails 9, 14, 15, which are provided with through-openings 58 in their bottoms for the purpose of passing the light beam through these supply rails 9, 14, 15.

As already mentioned, one of the containers 12, 12 for the upper parts 10 of the inserted objects and thus also the respective supply rail 14 or 15 is activated or deactivated by means of the control solenoids. This also activates the sensing device 56 of the currently active supply rail 14 or 15, so that a fault message from the area of the deactivated supply rail 15 or 14 is thus prevented.

This control of the feed of the parts_7, 10 of the inserted objects also operates in dependence on the movement of the slide 20. Here, a monitoring is used which is derived from the movement of the cam disc 24, by which the slide 20 is controlled. A timing control switch 59, which is only schematically indicated in the drawings, is arranged on the cam disc 24 in order to make the signal from the sensor device 56 on the feed rail_9, 14, 15 time- or angle-dependent on the insertion cycle. The timing control switch 59 sends a signal to the evaluation unit, for example, if the retracted position of the loading slide 16 is detected based on the position of the cam disc 24. In this

-1544 · e

· 4 4 · 4444

4 4 «4 λ

4

4

4 4

4 *4 4· • 4 * 4 4 4

4 4 4 4

4 44« 444

At this moment, signals must also be sent to the evaluation unit from the activated sensing devices 56, triggered by the movement of the parts _7, JO of the inserted objects. The evaluation unit checks the received signals and, in the event of a fault message, preferably causes the entire insertion device to stop.

The sensing devices 56 are arranged in the area of the feed rails 9, 14, 15 in such a way that it is ensured that there are always more parts 7, 10 of the inserted objects between the sensing devices 56 and the loading slide 16. This ensures that the feed rails 9, 14, 15 do not run completely empty. In the area between the sensing devices 56 and the loading slide 16 there is always a certain reserve of parts 7, 10 of the inserted objects.

Furthermore, the feed of the lower parts_7 and the upper parts 10 of the inserted objects in the area of the lower tool_5 and the upper tool 21 is also monitored. For this purpose, for example, a sensor 60 is arranged on the mounting plate_3, which detects the front end position of the loading slide 16 or the associated front end position of the lever arm 32. If the part _7, 10 of the inserted object becomes jammed during the forward movement of the loading slide J6, for example, this leads to the loading slide J6 and the lever arm 32 being stopped. This lever arm 32 thus does not come into the area of the sensor 60, which sends a signal in the event of a fault. This signal is advantageously used to stop the insertion device.

The above-described sensing and monitoring devices can be used in the device according to the invention both individually and in combination.

In addition, signals from the sensing of the mutual distance between the lower and upper sides of the rivet 55 and signals about the position of the charging slide J6, derived by means of the timing control sensor 59 from the position of the cam disc 24, can also be monitored in the correct dependence on the cycle progress.

* ·

-16 In Fig. 10 to 12, an alternative embodiment of monitoring the mutual distance between the lower and upper sides of the rivet 55 is schematically shown in another exemplary embodiment. In order to move the lower tool 5 into the riveting position by means of the cam disc 24, the linear displacement of the ejector element 61 is used here. This ejector element 61 is preceded by a transfer pressure spring 62 towards the transfer lever 63, which at the end opposite to the ejector element 61 rests on the side of the transfer lever 63 against a plate 64. A signal finger 65 is formed on this plate 64 coaxially with this plate 64, which passes through the pressure spring 62 and the ejector element 61. The free end of this signal finger 65 extends into the sensing area of the sensor 66, which is arranged on the stand_2.

Fig. 11 shows a riveting position in which, due to the permissible fabric thickness JJ, a predetermined distance between the lower and upper sides of the rivet 55 is maintained. The signal finger 65, which is connected directly to the plate 64 and the transfer lever 63, has left the sensing area of the sensor 66 with its free end. As a result, no signal is transmitted.

In Fig. 12, a rivet 55 is to be applied to a fabric 1_1 whose thickness causes a predetermined mutual distance between the lower and upper sides of the rivet 55 to be exceeded. The lower tool 5 and, in connection with this, the transfer lever 63 retreat during riveting due to the excessive thickness of the fabric 1_1. The compression spring 62 is compressed between the ejector element 61, which has not retreated, and the plate 64 on the side of the transfer lever 63. On the other hand, the signal finger 65, which is formed on the plate 64, moves towards the sensing area of the sensor gg, which in this situation sends a signal to switch off the device or at least to an indicator to inform the operator.

The features of the invention described in the preceding description and claims and illustrated in the drawings may be significant for carrying out the invention either individually or in any combination. All of the features described are important from the point of view of the invention. Scope

4 4 ·« 4 ·· · * • 44 · · · · · · ·

4 4 4 44 4 4444 ♦ 4444444 4 4 4 4 444 444

444 44» 4 4 • 4 4 44 444 44 4 4

-17 of the invention is also determined by the content of the relevant priority application, the full content of which is hereby claimed.

Represents:

Ing.J.Chlustina

Claims (61)

PATENT CLAIMS A device for attaching rivets, buttons or the like, comprising an upper tool (21) and a lower tool (5), wherein the upper tool (21) is preferably operated by a slide (20) and one of the tools (21,5) performs during the riveting process a backward movement, characterized in that the amount of backward movement is used to monitor the riveting process. Apparatus according to claim 1 or particularly according to this claim, characterized in that the downward movement of the lower tool (5) is used for monitoring. Device according to one or more of the preceding claims or in particular according to these claims, characterized in that the sensor tracks the path of movement of the lower tool (5). Device according to one or more of the preceding claims or in particular according to these claims, characterized in that the lower tool (5) activates the contact switch (54) when the predetermined path is exceeded. Apparatus according to one or more of the preceding claims, or in particular according to these claims, wherein the apparatus comprises supply rails (9,14,15) through which rivet or button parts (7, 10) are conveyed, characterized in that at least one supply rail (9,14,15) is provided with a sensing device (56) for monitoring the movement of the rivet or knob part (7, 10). • · · · · · · · · · · · · · · - Device according to one or more of the preceding claims or in particular according to these claims, wherein the rivet or knob part (7, 10) is guided through the supply rail (9, 14, 15) into the movement path of the charging slide (16). The sensor device (56) is disposed in the supply rail (9, 14, 15) from the charging slide (16) at a distance corresponding to a plurality of rivet or button parts (7, 10). Apparatus according to one or more of the preceding claims or in particular according to these claims, characterized in that the end position of the charging slide (16) is monitored in each riveting process. Device according to one or more of the preceding claims or in particular according to these claims, characterized in that the front end position of the charging slide (16) is monitored. Apparatus according to one or more of the preceding claims or in particular according to these claims, wherein riveting is carried out by means of a slide (20), characterized in that the movement of the slide (20) is monitored. Apparatus according to one or more of the preceding claims or in particular according to these claims, characterized in that the movement of the ram (20) is monitored by monitoring the movement of the cam disc (24) which controls the movement of the ram (20). Device according to one or more of the preceding claims, or in particular according to these claims, characterized in that a control switch (59) is arranged on the cam disc (24). -2012. Device according to one or more of the preceding claims or in particular according to these claims, characterized in that the signal from the sensing device (56) on the guide rails (9, 14, 15) is monitored in dependence on the slide movement cycle (20). Represented by: Ing. Jiří Chlustina 04.01.99 9 0 • · -21 From 03294/98-GB List of reference marks 1 base plate 2 stand 3 assembly plate 4 boom 5 bottom tool 6 anvil 7 lower part (item to be mounted) 8 magazine (for bottom parts 7) 9 supply rail 10 upper part (item to be mounted) 11 textiles 12 magazine (for upper parts 10) 13 magazine (for upper parts 10) 14 supply rail 15 supply rail 16 charging slider 17 upper sliding bar 18 bottom sliding bar 19 holding pliers 20 ram 21 upper tool 22 pulley 23 compression spring 24 cam disc 25 drive shaft Electromotive drive 27 boom «· -2228 control pulley 29 arm 30 pin 31 lever 32 lever arm 33 backdrop 34 backdrop stone 35 slide guide 36 Control path 37 pulley 38 control lever 39 pin 40 control arm (control levers 38) 41 tension spring 42 cam track 43 sensor pin 44 Transverse arm (transmission levers 45) 45 transmission lever 46 Transmission compression spring 47 counter 48 transverse pin 49 angle 50 annular groove 51 return spring 52 projection lamp 53 foot switch 54 contact switch 55 rivet 56 pickups • 9 • · -2357 light barrier 58 through hole 59 clock switch 60 sensor 61 an ejector element 62 compression spring 63 transmission lever 64 plate 65 signal thumb 66 sensor