WO2014061140A1

WO2014061140A1 - Support die, staking determination method, and button attachment tool

Info

Publication number: WO2014061140A1
Application number: PCT/JP2012/076984
Authority: WO
Inventors: 建二長谷川; 栄二隅内; 良二難波
Original assignee: Ykk株式会社
Priority date: 2012-10-18
Filing date: 2012-10-18
Publication date: 2014-04-24
Also published as: JPWO2014061140A1; CN104703494A; JP5969043B2; CN104703494B

Abstract

The purpose of the present invention is to provide a support die, a staking determination method, and a button attachment tool in which the acceptability of the attachment of buttons to fabric can be easily determined. The present invention relates to a support die (30) for supporting a button attachment tool (10) for attaching a button (20) to a fabric (1) when a plurality of protrusions (12) of the button attachment tool (10) are caused to penetrate the fabric (1) and are then staked to attach the button (20) to the fabric (1). The support die (30) is provided with a support body (40) on which the button attachment tool (10) is placed, and a sensor (32) for detecting, through the support body (40), the load applied to the button attachment tool (10) when the protrusions (12) are staked. The staking quality is determined on the basis of the result of the detection by the sensor (32). The support body (40) is divided in the circumferential direction into a plurality of support body segments (41), and the sensor (32) comprises a plurality of sensor elements (32a) arranged in the circumferential direction so as to correspond one-to-one with each of the support body segments (41).

Description

Support die, caulking determination method, and button fixture

The present invention relates to a support die, a caulking determination method, and a button fixture, and more specifically, a support die that supports a button fixture or the like when a button, eyelet, or hook eye is attached to the fabric, and a button or the like to the fabric. The present invention relates to a method for determining whether or not a protrusion such as a button fixture is fastened at the time of attachment, and a button fixture used when attaching a button to a cloth.

When attaching a button such as a metal female snap button to a cloth such as clothing or moss, a button fitting having five protrusions (see FIGS. 2 and 3) is generally used. In attaching the button to the fabric, the button is usually held by the upper button side die and the button attachment is placed on the lower attachment side die. Next, after the fabric is arranged between the button and the button fixture, when the button-side die is lowered, the projection of the button fixture penetrates the fabric upward and is then crimped inside the button (see FIG. 11). This secures the button to the fabric. At this time, if even one of the five protrusions of the button fixture cannot be caulked successfully, the button will be attached poorly. Conventionally, an operator visually determines whether or not the attachment is good, but it takes time and effort. The quality of attaching eyelets and hook eyes is also visually checked.

An object of the present invention is to provide a support die, a caulking determination method, and a button attachment that can easily determine whether or not buttons are attached to the fabric.

According to the present invention, when attaching the buttons to the cloth, the support die for supporting the buttons or the button attachments, the support on which the buttons or the button attachments are placed, and the buttons And a sensor for detecting a load applied to the buttons or button fixtures via the support while crimping a part of the buttons or a part of the button fixtures, and based on the detection result of the sensors A support die for determining whether the caulking is good or bad is provided.

In the present invention, the buttons include buttons, eyelets, hook eyes and the like attached to clothes, bags and the like. Examples of the button include a female snap button, a male snap button, a button of a type that passes through a button hole, and a decorative button. The button attachment is a button attachment having one or a plurality of protrusions, for example. The fabric includes woven fabric, fabric, non-woven fabric, felt, leather, resin sheet and the like.

In the present invention, when the buttons are attached to the cloth, the buttons or the buttons attaching member are set on the support die, and after a part of the projection of the buttons or the buttons attaching member penetrates the cloth, the part is It is crimped. Thereby, buttons are attached to cloth. The caulking can be performed with a button or the like supported by the support die or a punch that moves relatively toward the button attachment member. The load applied to the buttons or button attachments during caulking is transmitted to the support on which the buttons or button attachments are placed. Therefore, a load is applied to the support while caulking is performed, and slight distortion occurs. By detecting such a change in the load or distortion of the support with a sensor, it is possible to grasp how the load is applied to the buttons or the button fittings during caulking. When the caulking is performed normally and when it is performed abnormally, the change curve of the load applied to the buttons or the button attachments is different. Therefore, for example, a range of a load or distortion change curve in which caulking is normal is set from a load or distortion change curve obtained by performing a number of tests in advance. Then, it is determined whether or not the detected value detected by the sensor when the button is actually attached to the cloth is within the normal range. If it is within the range, it is determined that the caulking has been performed normally. Determines that the caulking is abnormal.

In one embodiment of the present invention, the support includes a plurality of support segments divided in the circumferential direction, and the sensor includes a plurality of sensor elements in the circumferential direction that correspond one-to-one to each support segment. . By dividing the support into a plurality of parts, for example, the load applied during caulking for each protrusion of the button attachment having a plurality of protrusions (a part of the button attachment) in the circumferential direction can be obtained. It can be grasped based on the detected value of each set of segment and sensor element. If the caulking is poor even with one protrusion, it is determined that the attachment of the button or the like is also poor. Further, if the load change curves between the support segments are different from each other by a certain amount or more when the eyelets are caulked, it can be determined that the caulking is defective. The number of divisions of the support into the support segments is preferably at least twice the number of protrusions in the circumferential direction of the button fixture. This is to ensure that two or more protrusions do not correspond at least partially to one support segment.

In one embodiment of the present invention, a normal range based on the load applied during caulking is set, and this range is compared with the detection result of the sensor to determine whether the caulking is good or bad. The determination of whether the caulking is good or not can be made based on whether the change curve of the load applied to the buttons or the button fittings during caulking is within the normal range as described above, and there are also the following modes. . For example, the quality of the caulking can be determined based on how much the center position of the load is deviated from the normal position or how much the maximum value of the load is different from the normal value. For example, in the case of attaching the eyelet to the cloth, if the center of the load is deviated from the center axis of the eyelet, this load is called an uneven load. Therefore, the normal range of the center position of the load or the eccentric load and the normal range of the maximum value of the load are set by a prior test, etc., and the quality of the caulking can be determined by comparing with the detection result of the sensor. it can.

In one embodiment of the present invention, the button attachment has a base portion and a plurality of protrusions protruding from the base portion as a part of the button attachment, and when the protrusion is crimped, The protrusion is deformed by contacting the buttons, and the sensor detects a load applied to the protrusion at the time of the deformation, and determines whether the caulking is good or not based on the detection result. In this case, the plurality of protrusions of the button fixture are penetrated through the fabric and then deformed while being in contact with the buttons to be crimped. During this deformation, the protrusion receives a load, the sensor detects a change in the load, and the quality of the caulking is determined from the detection result.

In one embodiment of the present invention, the button attachment has an annular base portion, and a plurality of protrusions protruding from the base portion as a part of the button attachment, the plurality of sensor elements being The load applied to each of the plurality of protrusions can be detected through the support segment divided into a plurality in the circumferential direction. In this case, the load applied to each of the plurality of protrusions protruding from the annular base portion of the button fixture is detected by the sensor element via the support segment. Here, the load applied to one protrusion is detected by one set of the support segment and sensor element corresponding one-to-one or by a plurality of sets adjacent in the circumferential direction.

In one embodiment of the present invention, the button fixture has an annular base portion and five projections protruding from the base portion as a part of the button fixture. Such a button attachment is used for attaching a female snap button or the like. In addition, the number of divisions of the support on which the button fixture having five protrusions is divided into the support segments is determined in the circumferential direction in order to reliably detect the load applied during caulking for each protrusion. 10 or more is preferable. The button attachment may have a raised portion at a portion corresponding to each protrusion on the bottom surface of the base portion. In this case, the load applied to the circumferential portion corresponding to each protrusion is more clearly transmitted to the support segment through the raised portion than the load applied to the circumferential portion having no protrusion. Thereby, the precision of the quality determination of the caulking of each protrusion increases.

According to another aspect of the present invention, when a button is attached to a cloth, a load applied to the button or the button attachment is detected while the part of the button or the part of the button attachment is crimped. There is provided a caulking determination method for determining whether caulking is good or not based on the detection result. The load applied to buttons or button fixtures during caulking can be grasped by detecting the load applied to the support on which the buttons or button fixtures are mounted or the change in the distortion of the support with a sensor. it can.

In one embodiment of the present invention, a part of the buttons or a part of the button fixture is a plurality of projections of the buttons or the button fixture, and is applied to each projection of the buttons or the button fixture. Detect load. In this case, whether or not the caulking is good can be determined for each protrusion, and if the caulking is defective even with one protrusion, it is determined that the buttons are not properly attached.

According to still another aspect of the present invention, there is provided a button attachment for use in attaching a button to a cloth, comprising an annular base portion and a plurality of protrusions protruding from the base portion, the bottom surface of the base portion A button fixture having a recess in a portion corresponding to each projection is provided. In such a button fixture, when each projection is crimped when the button is attached, each recess is deformed so that the depression is reduced if it is normal. On the other hand, when the caulking of a certain protrusion is not normal, there is little or no reduction deformation of the recess in the recess. Therefore, for example, it is possible to acquire an image of the bottom surface of the base portion after the button fitting is crimped with a camera, and determine whether each projection is caulked from the deformed state of the recess. This button fixture may have a hemispherical convex portion at the center of the concave portion. In this case, when the button fixture is caulked, the concave portion is deformed so as to reduce the depression, and the convex portion is deformed so as to be crushed. Therefore, the quality determination of the caulking from the image acquired by the camera described above can be more easily performed based on the deformation of the concave portion and the convex portion.

In the support die and the caulking determination method of the present invention, the quality of caulking is determined from the change in the load applied when caulking the buttons or the buttons mounting tool, and whether the buttons are attached to the fabric based on this is determined. It can be easily determined. Moreover, in the button fixture of this invention, the quality of crimping can be judged from the form of the button fixture after crimping, and the quality of the attachment to the cloth of a button can be determined easily based on this.

FIG. 1 is an overall explanatory view schematically showing a button attaching machine. FIG. 2 is a top view of the button fixture. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. FIG. 4 is a longitudinal sectional explanatory view partially showing a button side die and a fixture side die. FIG. 5 is a top view of the fixture-side die. 6 is a cross-sectional view taken along line BB in FIG. FIG. 7 is a longitudinal cross-sectional explanatory view showing a state in which the button and the button fixture are set on the button side die (punch) and the fixture side die, respectively. FIG. 8 is a longitudinal cross-sectional explanatory view showing a point in time when the projection of the button and the button mounting tool is in contact with the cloth in the button mounting process. FIG. 9 is a longitudinal cross-sectional explanatory view showing a point in time when the protrusion of the button attachment tool enters the flange portion of the button after passing through the cloth in the button attachment process. FIG. 10 is a longitudinal cross-sectional explanatory view showing the middle of crimping the protrusion of the button attachment in the button attachment step. FIG. 11 is a longitudinal cross-sectional explanatory view showing a point in time when the crimping of the protrusion of the button fixture is completed in the button attachment step. FIG. 12 is a longitudinal cross-sectional explanatory view showing a case where a button is attached abnormally by a button fixture in which one protrusion is warped radially outward. FIG. 13 is a longitudinal cross-sectional explanatory view showing a state where the buttons are attached abnormally from the state of FIG. FIG. 14 is a longitudinal cross-sectional explanatory view showing a case where a button is attached abnormally by a button fixture in which one protrusion is warped radially inward. FIG. 15 is a longitudinal cross-sectional explanatory view showing a state where the buttons are attached abnormally from the state of FIG. FIG. 16 is a perspective view showing a modification of the button fixture. FIG. 17 is a longitudinal sectional view showing another embodiment of the fixture die. 18 is a top view of the fixture die of FIG. FIG. 19 is a longitudinal cross-sectional explanatory view showing an example in which the button side die is disposed below, the fixture side die is disposed above, and the load sensor is provided on the button side die. FIG. 20 is an explanatory view of a longitudinal section of the eyelet die. 21 is a cross-sectional view taken along the line CC of FIG. FIG. 22 is a perspective view showing a button fixture according to another aspect of the present invention. FIG. 23 is a longitudinal sectional view showing a state immediately before the button is attached to the cloth with the button attachment of FIG. 24 is a longitudinal sectional view showing a state in which the button is normally attached to the cloth with the button attachment of FIG. FIG. 25 is a partially enlarged view of FIG. FIG. 26 is a longitudinal sectional view showing a state where the button is abnormally attached to the fabric with the button attachment of FIG. FIG. 27 is a partially enlarged view of FIG. FIG. 28 is a perspective view showing a modified example of the button fixture of FIG. FIG. 29 is a perspective view showing a button fixture having one protrusion. FIG. 30 is a longitudinal sectional view showing a state in which the button is attached to the cloth with the button attachment of FIG. FIG. 31 is a perspective view showing a hook eye or the like as another example of buttons. FIG. 32 is a perspective explanatory view schematically showing the hook eye attached to the waist of the trousers. FIG. 33 is a graph showing changes in load applied to the upper body segment with respect to the punch stroke.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Preferred embodiments of the invention will be described below with reference to the drawings. However, the invention is not limited to the embodiments, and can be appropriately changed within the scope of the claims and the equivalent scope thereof. . FIG. 1 is an overall explanatory view schematically showing a button attachment machine 100 in which a button attachment device according to the present invention is incorporated. The button attachment machine 100 uses a female snap button (hereinafter also simply referred to as “button”) 20 (see FIG. 11 and the like) 20 as an example of buttons and the like using a button attachment (hereinafter also simply referred to as “attachment”) 10. 1 is provided with a button attachment portion 101 for attachment to the device 1. The button attachment portion 101 includes a button side die 50 that holds the button 20 when attached to the fabric 1 and an attachment side die (support die) 30 on which the attachment 10 is placed. The button side die 50 and the fixture side die 30 are an embodiment of the button attachment device according to the present invention. The button attaching machine 100 includes a button carrying unit 102 and a fitting carrying unit 103 that automatically carry and supply the button 20 and the fitting 10 one by one to the button side die 50 and the fitting side die 30 of the button attaching unit 101, respectively. A button hopper 104 and a fixture hopper 105 in which a large number of buttons 20 and fixtures 10 are accommodated, respectively, and the button 20 and the fixture 10 in the button hopper 104 and the fixture hopper 105 are transferred to the button carrier 102 and the fixture. A button chute 106 and a fixture chute 107 for supplying the unit 103 are further provided. A display unit 108 is connected to the button attachment machine 100 via a signal line 109. The display unit 108 displays a detection value of a load sensor 32 and the like described later and a result of pass / fail judgment of the button 20 attached to the fabric 1 via a control circuit (not shown). The control circuit can compare the detected value from the load sensor 32 or the like with a normal value set in advance through a test or the like, for example, determine whether the attachment is good or bad, and display the determination result on the display unit 108. In the present embodiment, the button attaching machine 100 automatically supplies the buttons 20 and the attachments 10 to the button side die 50 and the attachment side die 30 of the button attachment portion 101, but the button side die 50 and the attachment side die 30. The button 20 and the fixture 10 can be manually set.

2 is a top view of the button fixture 10, and FIG. 3 is a cross-sectional view taken along line AA in FIG. The fixture 10 is a metal part such as an aluminum alloy, a copper alloy, and the like. The base portion 11 has an annular shape and the upper side from the radially inner end of the base portion 11 (the vertical direction of the fixture 10 is the plane of FIG. And 5 plate-like protrusions 12 as an example. The protrusion 12 is a part of the button fixture in the claims. The protrusions 12 extend substantially parallel to the axis of the fixture 10, and are formed at equiangular (72 degrees) intervals in the circumferential direction of the base portion 11. Each protrusion 12 gradually reduces the width along the circumferential direction of the base portion 11 upward, and has a sharp upper end. The bottom surface 10a of the fixture 10 is slightly curved so as to protrude downward. Referring to FIG. 7, female snap button 20 fixed to fabric 1 by fixture 10 is a metal part such as an aluminum alloy or a copper alloy, and an engagement shaft portion of male snap button (not shown) is detachable. And a flange portion 22 extending radially outward from the lower end 21a of the engagement portion 21 (upper and lower are based on the paper surface of FIG. 7 and the like). The flange portion 22 extends upward and radially outward from the lower end 21a of the engaging portion 21, and then curves and terminates in a C shape downward and radially inward (termination 23). An annular opening 24 is formed between the end 23 and the engaging portion 21 side portion of the flange portion 22. The terminal end 23 and the opening 24 are above the lower end 21 a of the engaging portion 21. As will be described in detail later, when the female snap button 20 is attached to the fabric 1, the projection 12 of the button fixture 10 penetrates the fabric 1 and then enters the flange portion 22 from the opening 24 of the button 20 (see FIG. 9). Then, it is crimped so as to bend along the inner side surface 22a of the flange portion 22 (see FIGS. 10 and 11). As a result, the button 20 is fixed to the fabric 1.

FIG. 4 is a longitudinal cross-sectional explanatory view partially showing the upper button side die 50 and the lower mounting tool side die 30 in the button mounting portion 101 of the button mounting machine 100. In this example, the button-side die 50 is disposed above and the fixture-side die 30 is disposed below. However, the present invention is not limited thereto, the attachment-side die 30 is disposed above, and the button-side die 50 is disposed below. Or both the button side die | dye 50 and the fixture side die | dye 30 may be arrange | positioned not in the up-down direction but in the left-right (lateral) direction. The button-side die 50 includes a steel punch 51 that can hold the female snap button 20 at the bottom, and only the punch 51 is shown as the button-side die 50 in FIG. Referring also to FIG. 7 showing the punch 51 in a state where the button 20 is held, the punch 51 enters the engagement space of the engagement portion 21 of the button 20 at the bottom thereof (the vertical direction of the punch 51 is shown in FIG. 4). , 7, etc. The same applies to the fixture side die 30.) The central convex portion 52 that is convex to the convex portion and the upper portion of the engaging portion 21 of the button 20 is received. An annular groove 53 and an inclined surface 54 that inclines upward from the annular groove 53 radially outward. The inclined surface 54 plays a role of plastically deforming the protrusion 12 as required while supporting the flange portion 22 from above when the protrusion 12 of the fixture 10 is caulked in the flange portion 22 of the button 20.

4 and 7, the fixture-side die 30 includes an annular upper body (support body) 40 (see FIG. 7) on which the fixture 10 is placed on the upper end surface 40a, and the upper body 40 from below. A substantially cylindrical lower body 31 to be supported, and a load sensor 32 disposed between a bottom surface 40b of the upper body 40 and an upper surface 31a of the lower body 31 are provided. Although described in detail later, the load sensor 32 is for detecting a load that the upper body 40 receives when the protrusion 12 of the fixture 10 is crimped. The load sensor 32 can be composed of a piezo element or the like. 5 is a top view of the fixture-side die 30, and FIG. 6 is a cross-sectional view taken along the line BB of FIG. The upper body 40 includes an upper body segment (hereinafter also simply referred to as “segment”) 41 divided into 10 in the circumferential direction as an example. The load sensor 32 is also composed of a sensor element 32a divided into 10 in the circumferential direction. Each sensor element 32a is arranged under each segment 41 so as to correspond to each segment 41 on a one-to-one basis. Thereby, the load applied to one certain segment 41 can be detected by one sensor element 32a corresponding to this segment 41. The fixture-side die 30 includes an annular member 34 for collecting the ten segments 41 from the radially outer side. An annular upper end surface 40a of the upper body 40 is slightly recessed downward so as to receive the bottom surface 10a of the fixture 10 in a consistent manner. The bottom surface 40b of the upper body 40 is a horizontal plane perpendicular to the axis, and the radially outer end of the bottom surface 40b is radially inward from the radially outer end of the upper end surface 40a. The upper body 40 has, on its inner periphery, an upper inner peripheral surface 42a having a constant inner diameter, a lower inner peripheral surface 42b having a constant inner diameter and a smaller diameter than the upper inner peripheral surface 42a, and a lower end of the upper inner peripheral surface 42a. An inner peripheral inclined surface 42c that connects the upper end of the lower inner peripheral surface 42b and whose inner diameter gradually decreases downward is provided. The upper body 40 is connected to the outer periphery of the upper outer peripheral surface 43a having a constant outer diameter and the lower end of the upper outer peripheral surface 43a and the radially outer end of the bottom surface 40b, and the outer diameter gradually decreases downward. And an inclined surface 43b. The outer peripheral inclined surface 43b has a steeper inclination with respect to the horizontal plane than the inner peripheral inclined surface 42c. The lower end of the upper outer peripheral surface 43a is at the same vertical position as the lower end of the upper inner peripheral surface 42a. The radially outer end of the bottom surface 40b is slightly outward in the radial direction from the upper inner peripheral surface 42a.

The lower body 31 includes an upper portion 31A into which the annular member 34 is fitted on the outer periphery. The outer diameter of the upper portion 31A is constant and is the same as the outer diameter of the bottom surface 40b of the upper body 40. The upper surface 31a of the upper part 31A is parallel to the bottom surface 40b of the upper body 40 and has the same inner and outer diameter as the inner and outer diameters of the bottom surface 40b. The lower body 31 excluding the upper part 31A has a constant outer diameter and matches the upper outer peripheral surface 43a of the upper body 40, and has a constant inner diameter and matches the lower inner peripheral surface 42b of the upper body 40. In the center of the lower body 31, there is a cavity 35 with a constant diameter extending along the axis. The signal line 32b and the power supply line 32c of each sensor element 32a are connected to a control circuit and a power supply circuit (not shown) through the cavity 35. The annular member 34 includes an outer peripheral surface 34a that is flush with the lower outer peripheral surface 31b of the lower body 31 excluding the upper outer peripheral surface 43a and the upper portion 31A of the upper body 40, and an inclined surface 34b that contacts the outer peripheral inclined surface 43b of the upper body 31. including. The annular member 34 is a portion recessed inward in the radial direction with respect to the upper outer peripheral surface 43a of the upper body 40 and the lower outer peripheral surface 31b of the lower body 31 (a portion extending between the outer peripheral inclined surface 43b of the upper body 40 and the upper portion 31A of the lower body 31). ) In a consistent manner.

Next, the process of attaching the button 20 to the fabric 1 will be described with reference to FIGS. FIG. 7 shows that the button 20 and the fixture 10 are supplied from the button carrier 102 and the fixture carrier 103 to the button die 50 (punch 51) and the fixture die 30 of the button fixture 101 in the button attachment machine 100, respectively. The set state. From this state, the fabric 1 is disposed between the button 20 and the fixture 10, and the punch 51 is lowered with respect to the fixture-side die 30. Note that the fixture-side die 30 may be raised with respect to the punch 51. FIG. 8 shows a point in time when the lower end 21 a of the button 20 is in contact with the upper surface of the fabric 1 and the tip of the protrusion 12 of the fixture 10 is in contact with the lower surface of the fabric 1 during the lowering of the punch 51. When the punch 51 further descends from this point, as shown in FIG. 9, the protrusion 12 of the fixture 10 penetrates the cloth 1 upward, and then enters the flange portion 22 from the opening 24 of the button 20, and the flange portion 22. It hits the inner surface 22a. As shown in FIGS. 10 and 11, the protrusion 12 of the fixture 10 is then curved radially outward and then downward along the inner surface 22 a of the flange portion 22 supported by the inclined surface 54 of the punch 51. Clamped on. FIG. 11 shows a state in which the caulking of the protrusion 12 of the fixture 10 has been completed and the attachment of the button 20 to the fabric 1 has been completed. At this point, the lowering of the punch 51 stops. The above is a case where the attachment of the button 20 to the fabric 1 is normally completed.

In the mounting step, from the point in time when the projection 12 of the fixture 10 contacts the fabric 1, the upper body 40 of the fixture-side die 30 is directed downward in the axial direction from the punch 51 through the button 20, the fabric 1 and the fixture 10. The load begins. The load received by the upper body 40 increases rapidly from the start point to the end point of the caulking of the protrusion 12. On the upper body 40, a relatively large load is applied to the circumferential portion corresponding to each projection 12 of the fixture 10, whereas the portion without the projection 12 of the fixture 10 (two projections 12 adjacent in the circumferential direction). The load applied to the circumferential portion corresponding to the intermediate portion is relatively small. Most of the attachment failure of the button 20 is due to the fact that one or more protrusions 12 of the attachment 10 are not successfully crimped. Further, when a certain protrusion 12 is normally crimped and when it is not crimped, a change curve of the load applied to the protrusion 12 from the punch 51 with respect to the downward stroke (movement amount) of the punch 51 is obtained. I know it ’s different. Therefore, in this embodiment, the presence or absence of a caulking failure of each protrusion 12 is detected by detecting the change in load applied when each protrusion 12 is caulked through the upper body segment 41 divided into 10 in the circumferential direction. Based on the detection result, if there is a caulking defect with one or more protrusions 12, it is determined that the button 20 is not properly mounted. In the present embodiment, the upper body 40 is divided into ten segments 41 in the circumferential direction with respect to the five projections 12 in the circumferential direction of the fixture 10, so that two or more projections 12 correspond to one segment 41 at the same time. The two segments 41 adjacent to each other in the circumferential direction can be made to correspond to one protrusion 12. Thereby, the load change curve at the time of caulking for each protrusion 12 can be detected by the sensor element 32 a via the segment 41. Moreover, in this embodiment, it determines based on the data acquired beforehand so that it may determine later whether the caulking of one protrusion 12 with the fixture 10 was normally complete | finished. However, the present invention is not limited to this, and the load change curve between the five protrusions 12 of the same fixture 10 can also be determined by comparing each time of actual attachment.

When the button 20 is attached to the fabric 1, the load received by the fixture 10 is always detected by the sensor element 32a of the fixture 10 via the segment 41 of the fixture 10, and a detection signal is transmitted from each sensor element 32a to the signal line. It is sent in real time to the control circuit via 32b. The control circuit compares the detection value input from each sensor element 32a via the AD conversion unit with the range of a normal load change curve that is defined and stored in advance. And if all the detected values of the fixture 10 are within the normal range, it is determined to be normal, and if even one of the detection data of the segment 41 of the fixture 10 is outside the normal range, it is determined to be abnormal, and the determination result is It is displayed on the display unit 108. The graph of FIG. 33 is a graph showing a change in load applied to one upper body segment 41 with respect to the stroke of the punch 51. From this graph, it can be seen that the caulking starts when the stroke of the punch 51 is about 3.5 mm, and then the load applied to the upper body segment 41 increases rapidly. A large number of such load change curves of the segment 41 can be acquired in advance including not only normal cases but also abnormal cases, and the range of normal change curves (see hatched portions) can be set.

Referring to FIGS. 12 and 13, an example in which the button 20 is not properly attached to the fabric 1 will be described. In the fixture 10 shown in FIG. 12, only one protrusion 12a out of the five protrusions 12 is warped radially outward. In this case, the protrusion 12 a that penetrates the cloth 1 when the button 20 is attached to the cloth 1 does not enter the flange portion 22 from the opening 24 of the button 20 and falls on the cloth 1 outside in the radial direction outside the flange portion 22. (See FIG. 13). In this case, only the load change curve applied to one or two segments 41 corresponding to the protrusion 12a in the circumferential direction of the upper body 40 of the fixture side die 30 is out of the normal range. Thereby, it determines with attachment failure.

14 and 15, another example when the button 20 is not properly attached to the fabric 1 will be described. In the fixture 10 shown in FIG. 14, only one protrusion 12 b of the five protrusions 12 is warped inward in the radial direction. In this case, the protrusion 12b that penetrates the cloth 1 when the button 20 is attached to the cloth 1 does not enter the flange portion 22 from the opening 24 of the button 20 and falls on the cloth 1 on the radially inner side outside the flange portion 22. (See FIG. 15). In this case, only the load change curve applied to one or two segments 41 corresponding to the protrusion 12b in the circumferential direction of the upper body 40 of the fixture side die 30 is out of the normal range. Thereby, it determines with attachment failure.

FIG. 16 shows a button fixture 60 which is a modification of the button fixture 10. The fixture 60 includes an annular base portion 61 and five protrusions 62 protruding in the axial direction from the radially inner end of the base portion 61. In the fixture 60, the base end portion 62 a of each protrusion 62 is locked as a raised portion 62 a that protrudes from the bottom surface 61 a of the base portion 61. In the fixture 60, when the load applied to the fixture 60 from the punch 51 when the button 20 is attached to the fabric 1 is transmitted to the upper body 41 of the fixture-side die 30, the projections 62 are connected to the projections 62 via the raised portions 62 a. The load applied to the corresponding circumferential portion is transmitted to the segment 41 more clearly than the load applied to the circumferential portion without the protrusion 62. Thereby, the precision of the quality determination of the caulking of each protrusion 62 increases.

In the above embodiment, whether or not the button 20 is attached is determined based on the change in the load applied to the upper body 40 of the fixture-side die 30, but the present invention is not limited to this. As another example, a slight distortion in the axial direction of the upper body 71 when the fixture 10 (or fixture 60) is caulked using the fixture-side die (support die) 70 shown in FIGS. It is possible to detect whether or not the button 20 is attached based on the detection result. The fixture-side die 70 includes an annular upper body (support body) 71 on which the fixture 10 is placed on the upper end surface 70 a, a cylindrical lower body 72 that supports the upper body 71 from below, and an upper body 71. A strain sensor 73 disposed on the inner peripheral surface 71b. The strain sensor 73 can be composed of a strain gauge or the like. The upper body 71 and the lower body 72 have inner and outer peripheral surfaces with a constant diameter. The outer diameters of the upper body 71 and the lower body 72 are the same, and the inner diameter of the upper body 71 is larger than the inner diameter of the lower body 72. The upper body 71 is composed of an upper body segment 71a divided into 10 as an example in the circumferential direction. The strain sensor 73 is also composed of a sensor element 73a divided into ten in the circumferential direction. Each sensor element 73a has a one-to-one correspondence with each segment 71a. In the present embodiment, when the mounting tool 10 receives a load from the punch 51 when the button 20 is attached to the fabric 1, this load is transmitted to the upper body 71, and each segment 71a is compressed in the axial direction and slightly distorted. . When one of the protrusions 12 is normally crimped and when it is not crimped, the distortion change curve of one or two segments 71a corresponding to the protrusion 12 in the circumferential direction is different. Therefore, in this embodiment, a change in load applied when each projection 12 is caulked is detected by the sensor element 73a as a change in distortion of the segment 71a divided into 10 in the circumferential direction, and the caulking of each projection 12 is based on this. The presence or absence of a defect is detected, and whether or not the button 20 is attached is determined based on the detection result.

In the above embodiment, the button side die 50 is disposed on the upper side, the fixture side dies 30 and 70 are disposed on the lower side, and the load sensor 32 or the strain sensor 73 is provided on the fixture side die 30 and 70 side. However, the present invention is not limited to this. As another example, as shown in FIG. 19, a button side die (support die) 80 on which the button 20 is placed is disposed below, and a fixture side die 90 for holding the button fixture 110 is disposed above, A load sensor 84 can be provided on the button side die 80. The buttons 20 and the fabric 1 are substantially the same as those in FIG. The fixture 110 is obtained by adding a metal or resin cap 111 to the fixture 10 described above so as to cover the bottom surface 10a of the base portion 11. The button-side die 80 has substantially the same configuration as the fixture-side die 30, and has an annular upper body (support body) 81 on which the button 20 is placed on the upper part, and a substantially cylindrical shape that supports the upper body 81 from below. A lower body 82, a load sensor 83 disposed between the bottom surface of the upper body 81 and the upper surface of the lower body 82, and an annular member 84 fitted on the outer periphery of the upper portion of the lower body 82. The upper body 81 is divided into ten upper body segments 81a in the circumferential direction, and the load sensor 83 is also divided into ten sensor elements 83a in the circumferential direction corresponding to the segments 81a on a one-to-one basis. The annular member 84 brings together the ten segments 81a from the radially outer side. The upper part of the upper body 81 has a configuration in which the bottom part of the punch 51 described above is turned upside down. The central convex part 81b that protrudes upward, the lower part around the central convex part 81b, and the button 20 are engaged. An annular groove 81c that receives the upper portion of the portion 21 and an inclined surface 81d that inclines downward from the annular groove 81c radially outward. The fixture-side die 90 includes a steel punch 91 capable of holding the fixture 110 at the bottom, and FIG. 19 shows only the punch 91 as the fixture-side die 90 for convenience. At the bottom of the punch 91, a recess 92 is provided that is concave upward so that the cap 111 of the fixture 110 can be held. When the punch 91 is lowered from the state of FIG. 19, the protrusion 12 of the fixture 110 penetrates the cloth 1 downward, and then enters the flange portion 22 from the opening 24 of the button 20. The protrusion 12 is crimped by the punch 91 along the inner surface 22a of the flange portion 22 supported from below on the inclined surface 81d of the upper body 81. A change in load applied when each projection 12 is caulked is detected through each set of the segment 81a and the sensor element 83a. Based on this detection value, the presence or absence of a caulking failure of each protrusion 12 is determined, and whether or not the button 110 is attached is determined.

FIG. 20 is a longitudinal cross-sectional explanatory view of an eyelet die (support die) 120 on which an eyelet is placed when an annular metal eyelet (not shown) as a button is attached to the cloth. 21 is a cross-sectional view taken along the line CC of FIG. The eyelet die 120 has substantially the same configuration as the above-described fixture-side die 30 except that an upper body 121 and a load sensor 123 described later are divided into three in the circumferential direction. The eyelet die 120 includes an annular upper body (support body) 121 on which an eyelet is placed on the upper end surface, a substantially cylindrical lower body 122 that supports the upper body 121 from below, and a bottom surface and a lower side of the upper body 121. A load sensor 123 disposed between the upper surface of the body 122 and an annular member 124 fitted on the outer periphery of the upper portion of the lower body 122 are provided. The upper body 40 is divided into three upper body segments 121a in the circumferential direction, and the load sensor 123 is also divided into three sensor elements 123a in the circumferential direction corresponding to the segments 121a on a one-to-one basis. The annular member 124 gathers the three segments 121a from the outside in the radial direction. When attaching the ring-shaped eyelet to the cloth, the eyelet is caulked against the upper end surface that is recessed below the upper body 121 by an upper punch (not shown). At this time, when the eyelet is normally attached to the cloth, the load applied to the eyelet is substantially equal in the circumferential direction, so that the change in the load detected through each pair of the segment 121a and the sensor element 123a is Almost the same. On the other hand, when the attachment of the eyelet is not normal, the load applied to the eyelet becomes uneven in the circumferential direction, so that the change in the load from one or two segments 121a is constant with the change in the load from the other segment 121a. It is different. In this manner, the presence or absence of a caulking defect is determined based on the difference in the detected values between the segments 121a, and whether or not the eyelet is attached can be determined. Note that the number of divisions in the circumferential direction of the upper segment 121 and the load sensor 123 is not limited to three, and may be four or more. In addition, the quality of eyelet attachment can also be determined by calculating the offset load based on the loads applied to the three load sensors 123. Specifically, since the load is applied equally to the three load sensors 123 in normal mounting, the load is calculated on the central axis of the eyelet when calculated based on the loads applied to the three load sensors 123 at this time. It can be assumed that it is on the support die 120. Here, since a difference occurs in the loads of the three load sensors 123 in the case of an abnormal condition, when these are calculated, the center of the load is compared with the center axis of the eyelet compared to the case of the normal attachment. It will be shifted. The load applied to the center at this time is called an eccentric load. The quality of the attachment can be determined based on how much the center position in the uneven load is different from the normal position. That is, the range of the center position in the uneven load in the case of normal attachment is set in advance, and it is determined whether or not it is within the normal range. When the calculation result is within the normal range, it is determined that the caulking has been performed normally, and when it is out of the range, it is determined that the caulking is not normal. Thereby, it determines with attachment failure.

FIG. 22 is a perspective view of a button fixture 130 according to another aspect of the present invention. The fixture 130 includes an annular base portion 131 and five protrusions 132 protruding in the axial direction from the radially inner end of the base portion 131. In the fixture 130, the base end portion 132 a of each protrusion 132 is formed as a rectangular recess 132 a that is recessed from the bottom surface 131 a of the base portion 132. As shown in FIGS. 23 and 24, when attaching the button 20 to the fabric 1, the attachment 130 is crimped within the flange portion 22 of the button 20 in the same manner as the

attachments

10 and 60 described above. Further, when the button 20 is attached, the fixture 130 is placed on the upper end surface of a conventional fixture-side die that does not include the above-described upper body segment, load sensor, and the like. Note that the above-described fixture-side dies 30 and 70 can also be used. The fixture 130 receives a load from the punch during caulking, whereby the base portion 131 of the fixture 130 is pressed against the upper end surface of the fixture-side die. This pressing is greater in the circumferential portion corresponding to each protrusion 132 in the base portion 131 than in the circumferential portion without the protrusion 132. Therefore, the five concave portions 132a corresponding to the protrusions 132 on the bottom surface 131a of the base portion 131 are crushed so as to be free of depressions and become substantially flush with the bottom surface 131a, and the bottom surface 131a becomes flat. FIG. 24 shows a state in which the concave portion 132a of FIG. 23 is substantially flush with the bottom surface 131a after caulking, which is enlarged and shown in FIG. The shape of the recessed portion 132a after crimping differs depending on whether a certain projection 132 is normally crimped or not. When normal, as described above, it is substantially flush with the bottom surface 131a of the base portion 131 (see FIG. 25). On the other hand, FIGS. 26 and 27 show examples of abnormal cases. FIG. 26 shows a state in which the concave portion 132a of FIG. 23 remains substantially even after caulking, and this is shown enlarged in FIG. A protrusion corresponding to the recess 132a that has not been normally crimped on the button 20 is indicated by reference numeral 132b. Thus, in the case of an abnormal state, the recess 132a remains almost as it is or partially. Therefore, for example, an image of the bottom surface side of the fixture 130 after caulking is acquired by a camera (not shown), and the presence or absence of caulking failure of each protrusion 132 is detected from the form of each recess 132a. Based on this, it is possible to determine whether the button 20 is attached or not.

FIG. 28 shows a button fixture 140 which is a modification of the button fixture 130 of FIG. The fixture 140 includes an annular base portion 141 and five protrusions 142 protruding in the axial direction from the radially inner end of the base portion 141. In the fixture 140, the base end portion 142 a of each protrusion 142 is formed as a rectangular recess 142 a that is recessed from the bottom surface 131 a of the base portion 141. Further, a hemispherical convex portion 142b is provided at the center of each concave portion 142a. Similar to the fixture 130, the fixture 140 receives a load during caulking, and thereby the base portion 141 of the fixture 140 is pressed against the upper end surface of the fixture-side die. Thereby, when caulking of each protrusion 142 is normally performed, the spherical surface of the hemispherical convex portion 142b at the center of each concave portion 142a is crushed into a flat surface on the bottom surface 141a of the base portion 141. When the caulking of a certain protrusion 142 is not normal, the spherical surface of the convex 142b remains as it is or partly remains. Therefore, for example, an image of the bottom surface side of the fixture 140 after crimping is acquired by a camera (not shown), and the presence or absence of a crimping failure of each protrusion 142 is detected from the form of each projection 142b, and this detection result Whether or not the button 20 is attached can be determined based on the above.

FIG. 29 is another example of the button attachment. The button attachment 150 is a resin or metal part, and includes a disk-shaped base portion 151 and a single protrusion 152 that protrudes concentrically with the base portion 151 from the center of the base portion 151. . FIG. 30 is a longitudinal cross-sectional explanatory view showing a state in which the button 160 is attached to the fabric 1 using the attachment tool 150. The button 160 is of a type that is inserted into and removed from the button hole, and is divided into a body portion 160b and a head portion 160a that has a diameter larger than that of the body portion 160b. The button 160 includes an outer shell member 161 that forms the outer peripheral surface and bottom surface of the body portion 160b and the bottom surface of the head portion 160a, a cap 162 that forms the upper surface and peripheral surface of the head portion 160a, and a reinforcement housed in the head portion 160a. Plate 163. The outer shell member 161 includes a cylindrical portion 164 that enters from the bottom surface of the trunk portion 160b into the trunk portion 160b. When the button 160 is attached to the fabric 1, the protrusion 152 of the fixture 150 penetrating the fabric 1 passes through the cylindrical portion 164 of the button 160, and is then tipped by a reinforcing plate 163 supported from above by a punch (not shown). It is crimped in the trunk portion 160b so that the portion is crushed (see FIG. 30). Changes in the load applied to the fixture 150 at the time of caulking are detected from changes in the load and strain of the support die of the fixture-side die that supports the fixture 150, and whether or not the button 160 is attached is determined based on this change. be able to. For example, a large number of tests for attaching the button 160 using the fixture 150 are performed in advance, and a range of a change curve of a load applied to the protrusion 152 when the protrusion 152 is normally crimped is set. Then, it is determined whether or not the detection value detected by the sensor via the support body of the fixture-side die when the actual button 160 is attached to the fabric 1 is within a normal range. When the detected value is within the normal range, it is determined that the caulking of the protrusion 152 has been performed normally, and when it is outside the range, it is determined that the caulking is not normal. Alternatively, a range is set for the maximum value of the load applied to the protrusion 152 when crimped normally, and it is determined whether the range is within the normal range. When the detected value is within the normal range, it can be determined that the caulking of the protrusion 152 has been performed normally, and when it is outside the range, it can be determined that the caulking is not normal.

FIG. 31 is a perspective view showing a hook member 170 as another example of buttons and a plate-like member 173 used when the hook member 170 is attached to the cloth 1. FIG. 32 shows a state where the hook member 170 is attached to the upper part of the chuck 3 on the waist of the pants 2 made of the fabric 1. The hook member 170 includes a hook main body 171 to be hooked on the hook portion 175 (FIG. 32), and two protrusions 172 to be crimped when the hook member 170 is attached to the fabric 1. The hook body 171 includes a front plate portion 171a that is slightly separated from the fabric 1, a back plate portion 171b that is the base end of the protrusion 172, and a connecting portion 171c that connects the front plate portion 171a and the back plate portion 171b in a curved shape. Including. The plate-like member 173 has a hole 174 through which each protrusion 172 passes. A combination of the hook member 170 and the hook portion 175 is referred to as a hook eye. When attaching the hook member 170 to the cloth 1, the protrusion 172 of the hook member 170 is passed through the cloth 1, and then passed through the hole 174 of the plate-like member 173, and then crimped on a support (not shown). Whether the hook member 170 is attached or not can be determined based on the detection result of the change in the load applied to the fixture protrusion 172 during the caulking from the change in the load or strain of the support. In addition, the hook portion 175 may be provided with two protrusions. In this case, whether or not the hook portion 175 is attached to the fabric can be determined.

DESCRIPTION OF SYMBOLS 1

Material

10, 60, 150

Button attachment

11, 61, 151

Base part

12, 62, 152 Protrusion 20 Female snap button 22

Flange part

30, 70 Attachment side die (support die)
40, 71 Upper body (support)
41, 71a Upper body segment (support segment)
32, 83

Load sensor

32, 73a, 83a Sensor element 50 Button side die 51, 91 Punch 62a Raised portion 73 Strain sensor 80 Button side die (support die)
81 Upper body (support)
81a Upper body segment 100 Button mounting machine 101 Button mounting part 108 Display part 120 Eyelet die (supporting die)
121 Upper body 121a Upper body segment 123 Load sensor

123a Sensor element

130, 140 Button fitting 131, 141

Base portion

132, 142 Protrusion 132a, 142a Concavity 142b Convex portion 160 Button 170 Hook member 172 Protrusion

Claims

When attaching the buttons (20, 160, 170) to the fabric (1), the support dies (30, 70, 80) for supporting the buttons (20, 160, 170) or the button fixtures (10, 60, 150) 120), and
A support (40, 71, 81, 121) on which the buttons (20, 160, 170) or the button fixtures (10, 60, 150) are placed;
While crimping a part of the buttons (20, 160, 170) or a part of the buttons fixture (10, 60, 150), the buttons (20, 160, 170) or the buttons fixture (10, 60, 150) and a sensor (32, 83, 73, 123) for detecting the load applied through the support (40, 71, 81, 121),
A support die for determining whether the caulking is good or not based on the detection results of the sensors (32, 83, 73, 123).
The support (40, 71, 81, 121) includes a support segment (41, 71a, 81a, 121a) divided into a plurality in the circumferential direction, and the sensors (32, 83, 73, 123) The support die according to claim 1, comprising a plurality of sensor elements (32, 73a, 83a, 123a) in the circumferential direction corresponding one-to-one to each support segment (41, 71a, 81a, 121a).
The support die according to claim 1, wherein a normal range based on a load applied during caulking is set, and the caulking quality is determined by comparing the range with a detection result of the sensor.
The sensor (32, 83, 73, 123) detects a load applied to the support (40, 71, 81, 121) or a strain of the support (40, 71, 81, 121). The support die according to any one of the above.
The button fittings (10, 60, 150) protrude from the base portion (11, 61) as a part of the base portions (11, 61) and the button fittings (10, 60, 150). A plurality of protrusions (12, 62), and when the protrusions (12, 62) are caulked, the protrusions (12, 62) contact the buttons (20, 160, 170) and deform, The sensor (32, 83, 73, 123) detects a load applied to the protrusion (12, 62) during the deformation, and determines whether the caulking is good or not based on the detection result. The support die according to one.
The button attachments (10, 60) include an annular base part (11, 61) and a plurality of buttons protruding from the base part (11, 61) as a part of the button attachments (10, 60). A projection (12, 62),
The plurality of sensor elements (32, 73a, 83a) are loaded on each of the plurality of protrusions (12, 62) via the support segment (41, 71a, 81a) divided in the circumferential direction. The support die according to claim 2, which can be detected.
The button attachments (10, 60) include an annular base part (11, 61) and five protrusions (12, 61) protruding from the base part (11, 61) as a part of the button attachments. 62). The support die according to any one of claims 1 to 5, wherein:
The support die according to claim 6 or 7, wherein the button fitting (60) has a raised portion (62a) at a portion corresponding to each protrusion (62) of the bottom surface (61a) of the base portion (61).
When attaching the buttons (20, 160, 170) to the fabric (1),
While crimping a part of the buttons (20, 160, 170) or a part of the buttons fixture (10, 60, 150), the buttons (20, 160, 170) or the buttons fixture (10, 60, 150), and a caulking determination method for determining whether the caulking is good or not based on the detection result.
A part of the buttons (20, 160, 170) or a part of the button fixtures (10, 60) may be a plurality of buttons (20, 160, 170) or button fixtures (10, 60). The projections (12, 62, 172) of the buttons, and the load applied to the projections (12, 62, 172) of the buttons (20, 160, 170) or the button fixture (10, 60) are detected. The caulking determination method described in 1.
Button attachments (130, 140) used when attaching the button (20) to the fabric (1),
An annular base (131, 141);
A plurality of protrusions (132, 142) protruding from the base portion (131, 141),
A button fixture having a recess (132a, 142a) in a portion corresponding to each protrusion (132, 142) on the bottom surface of the base portion (131, 141).
The button fitting according to claim 11, wherein the button fitting has a hemispherical convex portion (142b) in the center of the concave portion (142a).