JP2007204872A - Snap fastener attaching machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a snap fastener attaching machine capable of precisely preventing a diameter-enlarged deformation part from being restored in the reverse direction of a pressurizing direction by a hitting-in tool by the elasticity of a synthetic resin when the tip of protrusion of a rivet member of a synthetic resin is hit by the hitting tool to transform the tip so as to enlarge the diameter (flange formation). <P>SOLUTION: The hitting tool 9 for hitting the protrusion (a) is constituted so as to stop for a prescribed time in a state of the tip part of the protrusion transformed so as to enlarge the diameter in the snap fastener attaching machine regulated so as to caulk the rivet member A and a fitting member B in a sandwiching state of a sheet-shaped member C by deforming the tip part of the protrusion (a) so as to enlarge the diameter by hitting the protrusion (a) of the rivet member A of the synthetic resin inserted into a through hole of the fitting member B of a synthetic resin by the hitting tool 9. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  According to the present invention, the protrusion of the synthetic resin rivet member inserted into the through hole of the synthetic resin fitting member is struck with a driving tool, and the protrusion tip is expanded and deformed (flanged), thereby fitting with the rivet member. The present invention relates to a snap fastener attaching machine in which a fitting member and a sheet-like member are clamped and clamped.

  As this type of snap fastener attaching machine, as described in Patent Document 1, a snap fastener attaching machine in which the driving tool is driven up and down by a crank mechanism that is rotationally driven by a motor output via a one-rotation clutch. Is the most common. This type of snap fastener attaching machine is capable of high-speed operation compared to the type of snap fastener attaching machine that uses a pneumatic cylinder device to drive the driving tool up and down, so the fitting member and rivet member can be supplied to the hopper and chute. It is suitable as a so-called automatic machine that is automatically performed by a pusher or the like.

  However, when the rivet member is, for example, an injection-molded product of a synthetic resin material such as polyacetal, polyethylene, or polyester, the conventional snap fastener mounting machine hits the tip of the projection of the synthetic resin rivet member with a driving tool. When the diameter is expanded (flanged), due to the elasticity of the synthetic resin, the diameter expansion deformed portion is slightly deformed in the direction opposite to the direction of pressure applied by the driving tool, and the caulking stop is unstable. There was a case. This tendency is particularly remarkable when the rivet member is made of polyester.

  In order to solve such a problem, the present inventor has developed a snap fastener attaching machine in which a protrusion of a synthetic resin rivet member is hit twice with a driving tool, and has proposed as Patent Document 2.

  This snap fastener attaching machine is a so-called semi-automatic machine that manually supplies a fitting member and a rivet member to a driving tool and a receiving tool as described in Patent Document 2, so that caulking is slowly performed. Although it is quite effective, even if the tip of the protrusion is momentarily hit twice, a certain amount of time is required to stabilize the expanded diameter deformed portion at the tip of the protrusion in a plastically deformed state. In some cases, even if the tip end of the protrusion is hit twice instantaneously, the restoration due to elasticity may not be prevented. This tendency is particularly noticeable in an automatic machine that performs a caulking stop operation efficiently by high-speed operation.

Utility Model Registration Gazette No. 2592699 JP 2004-73368 A

  The present invention has been made in consideration of the above points, and the purpose of the present invention is when the tip of the protrusion of the synthetic resin rivet member is struck with a driving tool and subjected to diameter expansion deformation (flanging). Another object of the present invention is to provide a snap fastener attaching machine that can reliably prevent the diameter-enlarged deformed portion from being restored in the direction opposite to the pressing direction by the driving tool due to the elasticity of the synthetic resin.

  In order to achieve the above object, technical measures taken by the present invention are as follows. That is, the invention according to claim 1 is the rivet by striking the projection of the synthetic resin rivet member inserted into the through hole of the synthetic resin fitting member with a driving tool and expanding the deformation of the tip of the projection. In a snap fastener attaching machine in which a member and a fitting member are crimped to a state sandwiching a sheet-like member, a driving tool for striking a protrusion is allowed to stand still for a certain period of time with the diameter of the tip of the protrusion being enlarged. It is characterized by being configured.

  The invention according to claim 2 is a receiving tool for supporting the rivet member made of synthetic resin so that the projections face upward, a driving tool that can be moved up and down disposed opposite to the receiving tool, A first hopper that accommodates a synthetic resin fitting member in which a through hole for inserting a protrusion of the rivet member is formed, a second hopper that accommodates the rivet member, and a fitting member that is fed from the first hopper A first chute for feeding down, a second chute for feeding down the rivet member fed from the second hopper, and a fitting member fed down to the lower end of the first chute, A pusher capable of reciprocating in the front-rear direction having a two-stage pressing plate portion for feeding the rivet member fed down to the lower end to the receiving device, and a driving device for driving the driving tool; The driving tool includes a driving means for the shear, and the driving tool includes a driving tool body that can be moved up and down driven by the driving means, and an upper and lower part that is slidable in the vertical direction to hold the fitting member. A chuck, a cylindrical shaft-shaped guide punch that is slidable in the vertical direction with respect to the driving tool main body and biased downward by the biasing means, and disposed inside the guide punch and fixed to the driving tool main body A cradle punch, and the receiver includes a pedestal on which the rivet member is placed, and an openable / closable lower chuck for positioning the rivet member, which is configured to be synchronized with the lowering of the driving tool at a predetermined timing; A fitting member with the guide punch by lowering the driving tool in a state in which a sheet-like member is interposed between the receiving tool and the driving tool. Push down, pierce the projection of the rivet member into the sheet-like member and insert it into the through hole of the fitting member, hit the tip of the projection with the caulking punch, and deform the diameter to expand the rivet member and the fitting member. In a snap fastener attaching machine adapted to be caulked and held in a state of sandwiching a member, a driving shaft for driving the driving tool is driven by a motor via a one-rotation clutch, a cam provided on the cam shaft, The cam follower and the interlocking mechanism that converts the cam follower operation into the raising / lowering operation of the driving tool, and by forming a predetermined angular range on the cam surface into a circular shape, the cam shaft is integrated. While rotating, the driving tool is characterized in that it is configured to stand still for a certain period of time with the diameter of the protrusion tip of the rivet member being expanded and deformed.

  According to the first aspect of the present invention, the driving tool for striking the protrusion of the rivet member is stationary for a certain period of time while the tip of the protrusion is expanded and deformed. It is possible to ensure the time until it is stabilized, and it is possible to reliably prevent the expanded diameter deformed portion from being restored in the direction opposite to the pressing direction by the driving tool by the elasticity of the synthetic resin.

  According to the second aspect of the present invention, by forming a predetermined angle range of the cam surface in a circular shape, the driving tool causes the protrusion tip portion of the rivet member to expand and deform while the cam shaft rotates once. In this state, the camshaft is configured to remain stationary for a certain period of time, so that it is possible to secure a time until the enlarged diameter deformed portion at the tip of the projection is stabilized in a plastically deformed state during one rotation of the camshaft. It is possible to reliably prevent the radially deformed portion from being restored in the direction opposite to the pressing direction by the driving tool.

  In particular, of the time that the camshaft makes one revolution, a small amount of time excluding the resting time of the driving tool is spent for both lowering and raising of the driving tool, that is, it is provided for the cam on the camshaft. Of the 360-degree cam surface, a cam surface portion that is less than half of the portion excluding a predetermined angular range formed in a circular shape (a cam surface portion for stopping the driving tool for a certain period of time) Since the lowering is governed, the protrusion of the rivet member can be penetrated into the sheet-like member at a high speed by pushing down the fitting member.

  Therefore, during the rotation of the camshaft, the rivet member penetrates the sheet-like member at as high a speed as possible in a short time to maintain the enlarged diameter deformed portion at the tip of the protrusion (the enlarged diameter deformed portion is plastically deformed) It is possible to take as long as possible the time until the state is stabilized. This is an extremely great advantage in an automatic machine that performs a caulking stop operation efficiently by high-speed operation.

  1 to 13 show an example of a snap fastener attaching machine according to the present invention. In these drawings, reference numeral 1 denotes a self-supporting main body frame. The main body frame 1 includes a base 2, a hollow support column 3 standing on the base 2, and a block shape connected to the upper part of the support column 3. The frame 4 and the upper frame 5 that also serves as a cover covering the block-like frame 4 are configured. A flywheel (not shown) linked to an output shaft of a motor (not shown) built in the support 3 via a transmission belt is installed on one side of the support 3.

  A cam shaft 6 is installed in the support column 3 so as to be concentric with the flywheel shaft. A one-rotation clutch (not shown) is provided between the flywheel shaft and the cam shaft 6, and the cam shaft 6 is configured to be rotationally driven by the motor via the one-rotation clutch. . The one-turn clutch is configured to be turned on by depressing a pedal 7 provided on the base 2 and to be automatically turned off by one turn.

  At the lower part on the front end side of the block-shaped frame 4, a support 8 is provided for supporting the rivet member A made of synthetic resin so that the projections face upward. An up / down driving tool 9 is provided above the receiving tool 8 so as to be opposed to the receiving tool 8.

  As shown in FIGS. 1 and 8, a pair of left and right vertical frames 11 fixed to both ends of a pair of front and rear horizontal frames 10 provided on the upper end of the upper frame 5 are provided on both left and right sides of the upper frame 5. The right vertical frame 11 includes a first hopper 12a for accommodating a synthetic resin fitting member B in which a through-hole for inserting a protrusion of the rivet member A is formed at the center, and a first hopper 12a. A first chute 13a is provided to flow down the drawn fitting member B. The left vertical frame 11 has a second hopper 12b for housing the rivet member A, and a rivet fed from the second hopper 12b. A second chute 13b for supplying the member A down is provided.

  The first chute 13a and the second chute 13b are attached to the vertical frame 11 in a detachable / replaceable state so that they can be exchanged with those having different cross-sectional shapes of the flow paths as necessary. Windows 14a and 14b along the chute longitudinal direction are formed on the front surface so that the fitting member B and the rivet member A remaining in the chute can be visually confirmed. Further, as shown in FIGS. 5 to 7, the second chute 13 b is disposed behind the first chute 13 a, whereby the sheet-like member C is interposed between the driving tool 9 and the receiving tool 8. A sufficient working space is formed to insert the.

  The first and second hoppers 12a and 12b are fixed to horizontal shafts 15a and 15b that are rotatably supported by the vertical frame 11 via bearings. Arms 16a and 16b are provided at inner end portions of the horizontal shafts 15a and 15b via ratchet mechanisms (not shown) that allow rotation in one direction, and the arms 16a and 16b are connected to the upper frame 5. Are connected to swing arms 17a, 17b provided on both left and right side surfaces of the same by coil springs 18a, 18b. In addition, return coil springs 19 a and 19 b are provided between the arms 16 a and 16 b and the left and right side surfaces of the upper frame 5. The first and second hoppers 12a and 12b rotate intermittently in one direction by the reciprocating swing of the swing arms 17a and 17b, and the intermittently rotates the fitting member B from the first hopper 12a in a fixed posture. The rivet member A is extended from the second hopper 12b in a fixed posture. 20a is a member supply port for fitting, and 20b is a rivet member supply port.

  Reference numeral 21 denotes a pusher having two upper and lower pressing plate portions 21a and 21b that can reciprocate in the front-rear direction. The pusher 21 is made of a metal plate having a predetermined thickness and is supplied to the lower end of the first chute 13a. The member B is sent to the driving tool 9 by the upper pressing plate portion 21a, and the rivet member A supplied to the lower end of the second chute 13b is sent to the receiving tool 8 by the lower pressing plate portion 21b. Has been.

  As shown in FIGS. 5 to 7, the driving tool 9 includes a driving tool body 22 that can be moved up and down driven by a lifting drive means, and a fitting member that is slidably mounted on the driving tool body 22 in a vertical direction. An openable / closable upper chuck 23 and a cylinder which is slidable in the vertical direction with respect to the driving tool main body 22 and is urged downward by a biasing means comprising a coil spring 24 interposed between the driving tool main body 22. A shaft-shaped guide punch 25 and a caulking punch 26 which is disposed inside the guide punch 26 and fixed to the driving tool main body 22 and moves up and down integrally with the driving tool main body 22 are provided. A spring 27 biases the upper chuck 23 in a closed state.

  The guide punch 25 and the caulking punch 26 are attached to the driving tool main body 22 so as to be detachable and replaceable. That is, the guide punch 25 and the caulking punch 26 have shapes suitable for the case where the fitting member B is male (for male snap) and the case where the fitting member B is female (for female snap). Are prepared in advance, and are exchanged depending on whether the fitting member B is male or female. Reference numeral 28 denotes a retaining ring for the guide punch 25, which is screwed and fixed to the lower end of the driving tool main body 22.

  As shown in FIGS. 9 and 11, the upper chuck 23 elastically holds the fitting member B fed by the upper pressing plate portion 21a of the pusher 21 so as not to fall by its own weight. The fitting member B pushed down by the guide punch 25 of the tool 9 is pushed left and right against the spring 27 to release the holding state of the fitting member B. 29 is a pressing spring for holding the upper chuck 23 against the driving tool body 22 by friction force by pressing the upper chuck 23 against the front surface of the driving tool body 22, 30 is a nut for adjusting the spring pressure, and 31 is a driving tool body. 22 is a stopper that defines the upper limit position of the upper chuck 23 relative to 22.

  The receiver 8 includes a cradle 32 on which the rivet member A is placed, and an openable / closable lower chuck 33 for positioning the rivet member, which is configured to be synchronized with the lowering of the driving tool 9 at a predetermined timing. It has. The lower chuck 33 is composed of a pair of left and right members biased in a closed state by a spring 34, and a rivet member A fed into the opposite side surfaces of the pair of left and right members by a lower pressing plate portion 21 b. And a circular hole located at the end of the guide groove (directly above the cradle 32), and the inner diameter of the circular hole is larger than the diameter of the head of the rivet member A. It has a slightly larger diameter. Reference numeral 35 denotes a guide plate for guiding the vertical movement of the lower chuck 33, which is positioned on the lower front surface of the block-shaped frame 4 by two pins 36 and fixed by bolts 37.

  The lower ends of the pair of left and right members of the lower chuck 33 are pivotally attached to the front end of a swing arm 39 pivotally supported by the block-shaped frame 4 by a horizontal shaft 38 with a pin 40 that can be inserted and removed. By swinging in the clockwise direction in FIGS. 2 to 4 about the horizontal axis 38, the lower chuck 33 is configured to descend while opening left and right against the spring 34.

  A plate 41 with a hole is fixed to the rear end of the swing arm 39 pivotally connected to the lower end of the lower chuck 33. A rod 42 is inserted into the hole of the plate 41, and a timing adjusting nut 43 is screwed to the lower end side of the rod 42. The upper end of the rod 42 is connected to the rear end of a swing link 45 pivotally supported by the upper frame 5 via a fulcrum shaft 44, and swings about the fulcrum shaft 47 around the front end of the swing link 45. The intermediate portion of the swing link 48 is pivotally connected by a link 49 whose length can be adjusted. The swing link 48 constitutes a part of a lifting / lowering driving means of the driving tool 9 described later, and is configured to swing up and down around the fulcrum shaft 47 as the driving tool 9 moves up and down.

  When the swing link 45 swings in the clockwise direction in FIGS. 2 to 4 due to the downward swing of the swing link 48 as the driving tool 9 descends, the rod 42 is lifted up. The nut 43 comes into contact with the lower surface of the plate 41 with the time lag and the nut 43 pulls up the plate 41, so that the swing arm 39 swings in the clockwise direction to lower the lower chuck 33. Reference numeral 50 denotes a coil spring that urges the swing arm 39 counterclockwise to hold the lower chuck 33 in an ascending posture, and is provided in a state of being fitted onto the rod 42. The fulcrum shaft 44 of the swing link 45 is pivotally supported by the upper frame 5 so as to rotate integrally with the swing link 45, and the first and second hoppers 12a, 12a, The swing arms 17a and 17b for driving 12b are fixed.

  According to said structure, as shown in FIG.5, FIG.6, FIG.11, in the state which interposed the sheet-like member C, such as the edge of clothes, between the said receiving tool 8 and the said driving tool 9, By lowering the driving tool 9, as shown in FIG. 12 (a), the upper chuck 23 is lowered while holding the fitting member B, and the upper chuck 23 is supported by the lower chuck 33. Even after coming into contact with C, the guide punch 24 pushes down the fitting member B as shown in FIG. The sheet-like member C is inserted and inserted into the through hole b of the fitting member B.

  In this state, the guide punch 24 and the caulking punch 25 continue to descend further, and the caulking punch 25 descends with respect to the guide punch 24 even after the lowering of the guide punch 24 is blocked by the cradle 32 as shown in FIG. Thus, the tip end portion of the protrusion a is struck by the caulking punch 25 to be expanded in diameter, and the rivet member A and the fitting member B are caulked and stopped with the sheet-like member C interposed therebetween.

  11 to 13, the male fitting member B is shown as the fitting member B. However, by replacing the guide punch 25 and the caulking punch 26 with those for female snapping, a female fitting can be obtained. The joint member B and the rivet member A can be caulked. That is, the snap fastener includes a rivet member A and a male fitting member B that form a male snap D, and a rivet member A and a female fitting member B that form a female snap E, as shown in FIG. It is made of four members, and either the male snap D or the female snap E can be produced by exchanging the guide punch 25 and the caulking punch 26.

  The raising / lowering drive means of the driving tool 9 includes the cam shaft 6, a first cam 51 provided on the cam shaft 6, a first cam follower 52 that follows the first cam 51, and a first cam follower 52. And an interlocking mechanism 53 that converts the movement of the driving tool 9 into the raising / lowering movement of the driving tool 9, and a predetermined angular range (approximately 150 degrees in the illustrated example) of the cam surface is a circular shape (an arc having a constant radius). Thus, while the camshaft 6 makes one rotation in the arrow direction X, the driving tool 9 is configured to stand still for a certain period of time while the tip end of the protrusion of the rivet member A is expanded and deformed.

  Then, a narrow angle range (cam surface portion eccentric at a steep angle) β preceding the circular cam surface portion (predetermined angle range α), that is, a predetermined angle range (driving tool) formed in a circular shape. The cam surface portion that is less than half of the portion excluding α) that is stationary for a certain period of time is the descent of the driving tool 9 (from the penetration of the rivet member A into the sheet-like member C to the tip of the protrusion a of the rivet member A) It is configured to administer up to the hit of the department.

  The interlocking mechanism 53 shown in the figure is a link 54 pivotally connected to the upper end of the driving tool main body 22, and is connected to the link 54 in a range of a pin 55 and a long hole 56 so as to be extendable and contracted by a compression spring 57 in the extending direction. The oscillating link 58, the oscillating link 48 pivotally supported on the upper frame 5 around the fulcrum shaft 47, the upper end pivotally attached to the vicinity of the tip of the oscillating link 48, and the first end at the lower end. The cam follower 52 is supported by a rod 59 and a return spring 60. A long hole 59 a through which the cam shaft 6 is inserted is formed in the vicinity of the lower end of the rod 59.

As shown in FIGS. 3 and 6, the pusher 21 has a rear end position where the lower pressing plate portion 21b is retracted from the rivet member A flowing down the second chute 13b, and as shown in FIGS. Then, the upper pressing plate portion 13a feeds the fitting member B, which has flowed down the first chute 13a, to the position held by the upper chuck 23 to the driving tool 9, and the lower pressing plate portion 13b is moved to the second chute. The rivet member B that has flowed down 13b reciprocates as a stroke length with respect to the advance position sent to the receiving tool 8, but the driving tool 9 stops at the upper end of the lifting stroke as shown in FIGS. When the pusher 21 moves forward to the front end of the reciprocating stroke, the fitting member B is fed into the driving tool 9 and the rivet member B is fed into the receiving tool 8, respectively. By stopping at a position short distance backward, a gap S ₁ is formed between the fitting member B fed into the implanted device 9 and the pressing plate part 13a of the upper pusher 21, and, the lower pusher 21 A gap S <b> ₂ is formed between the pressing plate portion 13 b and the rivet member B fed into the receiving member 8.

  In other words, the pusher 21 is based on a position retracted by a small distance from the front end of the reciprocating stroke (see FIG. 5), and reciprocates from the base point when the driving tool 9 is lowered in accordance with a single lifting operation of the driving tool 9. Retracted to the rear end of the troke (see FIG. 6), and when the driving tool 9 was raised, the rivet member A and the fitting member B were moved forward to the front end of the reciprocating troke to be fed into the receiving tool 8 and the driving tool 9 (see FIG. 7) After that, it is configured to return to the base point again (see FIG. 5) and stop.

  The drive means of the pusher 21 includes the cam shaft 6, a second cam 61 provided on the cam shaft 6, a second cam follower 62 that follows the second cam 61, and the operations of the second cam follower 62. Is constructed with an interlocking mechanism 63 that converts the pusher 21 into a reciprocating motion in the front-rear direction.

  The illustrated interlocking mechanism 63 is guided by the block-like frame 4 so as to be slidable in the front-rear direction, and has two rods 64 attached to the tip in a state where the pusher 21 can be attached and detached, and slidably bias both rods 64 forward. A spring 65, a roller 66 horizontally mounted on the rear end portion of the rod 64, and a pivot 3 that is pivotably supported by the support column 3 via a horizontal shaft 67; a second cam follower 62 is pivotally supported at the lower end portion; The swing arm 68 with its upper end abutted against the front portion of the roller 66 and the swing arm 68 are urged around the horizontal axis 67 in the direction in which the second cam follower 62 is in pressure contact with the second cam 61. A spring 69 is included.

  In other words, the pusher 21 performs forward movement (advance operation) to feed the rivet member A and the fitting member B to the receiving device 8 and the driving device 9 by the force of the spring 65, and the backward operation is shaken by the second cam 61. It is configured to be performed by a swing arm 68 that is dynamically driven. If the upper end of the swing arm 68 is not directly connected to the shaft of the roller 66 but is simply brought into contact with the front of the roller 66, an unexpected situation such as a clogging of the receiving tool 8 or the driving tool 9 may occur. In this case, it is considered that the pusher 21 does not forcibly move forward due to mechanical force and the receiving tool 8, the driving tool 9 and the like are not damaged.

Reference numeral 70 denotes a work table on which the sheet-like member C is placed, and is detachably attached to the main body frame 1. The work table 70 is mounted so that its position can be adjusted before and after the positioning rising piece 71 capable of abutting the rear end edge of the sheet-like member C. Reference numeral 72 denotes a marking projector disposed behind the driving tool 9. When the driving tool 9 is at the upper end of the lifting stroke, a predetermined position of the sheet-like member C (the rivet in the sheet-like member C is passed through the gap S _1. A cross-shaped spotlight M is irradiated onto the protrusion A of the member A). The marking projector 72 is pivotally supported by the block frame 4 via a fulcrum shaft 73 in the left-right direction so as to be swingable in the front-rear direction around the fulcrum shaft 73 and is a spring (in the illustrated example, a leaf spring) 74. Is biased in one direction. Then, by rotating the adjusting tool 75 formed of a screw shaft having a tapered tip with an appropriate tool, the marking projector 72 is swung around the fulcrum shaft 73 against the spring 74, and the light It is configured to adjust the shaft back and forth.

  According to the above configuration, the driving tool 9 can be moved to the rivet member A during one rotation of the cam shaft 6 by forming a predetermined angular range α of the cam surface formed on the first cam 51 in a circular shape. Since the tip end portion of the protrusion a is stationary for a predetermined time in a state where the diameter of the protrusion a is deformed, until the cam shaft 6 makes one rotation, the diameter expanding deformation portion c at the tip of the protrusion is stabilized in a plastically deformed state. It is possible to reliably prevent the diameter-enlarged deformation portion c from being restored in the direction opposite to the pressing direction by the driving tool 9 due to the elasticity of the synthetic resin.

  In particular, of the time for which the camshaft 6 rotates once, a small amount of time excluding the resting time of the driving tool 9 is spent for both lowering and raising of the driving tool 9, that is, on the camshaft 6. Of the 360-degree cam surface provided on the first cam 51, 1 / of a portion excluding a predetermined angular range (cam surface portion for allowing the driving tool 9 to stand still for a certain period) α formed in a circular shape. Since the cam surface portion of 2 or less (the narrow angle range β preceding the predetermined angle range α) governs the lowering of the driving tool 9, the sheet shape of the protrusion a of the rivet member A by pressing down of the fitting member B The penetration to the member C can be performed at high speed.

  Therefore, when the material resin of the rivet member A is polyacetal, even if it is polyethylene, polyester, or the like, the rivet member A can be surely penetrated into the sheet-like member C, and the rivet member (projection) The diameter expansion deformation due to the impact of the tip portion) can be performed without the restoration due to the elasticity of the material resin.

It is a perspective view of a snap fastener attaching machine showing an embodiment of the present invention. It is a vertical side view of the principal part. It is a vertical side view of the principal part. It is a vertical side view of the principal part. It is an expanded vertical side view of the principal part. It is an expanded vertical side view of the principal part. It is an expanded vertical side view of the principal part. It is a front view of the principal part. It is an enlarged front view of the principal part. It is an enlarged front view of the principal part. It is an enlarged front view of the principal part explaining a caulking stop effect | action. It is an enlarged front view of the principal part explaining a caulking stop effect | action. It is an enlarged front view of the principal part explaining a caulking stop effect | action. It is sectional drawing explaining the structure of a snap fastener.

Explanation of symbols

A Rivet member B Fitting member C Sheet-like member a Protrusion b Through-hole c Expanding deformation part 6 Cam shaft 8 Receiving tool 9 Driving tool 12a First hopper 12b Second hopper 13a First chute 13b Second chute 21 Pusher 21a, 21b Pressing plate portion 22 Driving tool main body 23 Upper chuck 25 Guide punch 26 Caulking punch 33 Lower chuck 51 First cam 52 First cam follower 53 Interlocking mechanism

Claims (2)

    The projection of the synthetic resin rivet member inserted into the through hole of the synthetic resin fitting member is struck with a driving tool, and the protrusion tip is enlarged and deformed, whereby the rivet member and the fitting member are replaced with a sheet-like member. A snap fastener mounting machine characterized in that, in a snap fastener mounting machine that is crimped to a pinched state, the driving tool for striking the projection is configured to be stationary for a certain period of time while the tip of the projection is expanded in diameter. Machine.     A support for supporting the rivet member made of synthetic resin so that the protrusions face upward, a driving tool that can be moved up and down disposed above the rivet member, and a protrusion for inserting the rivet member in the center. A first hopper that accommodates a fitting member made of synthetic resin in which a through hole is formed, a second hopper that accommodates a rivet member, a first chute that feeds down the fitting member fed out from the first hopper, A second chute that feeds down the rivet member fed out from the second hopper, and a fitting member that flows down to the lower end of the first chute, and a rivet member that flows down to the lower end of the second chute are used as the driving tool. A pusher capable of reciprocating in the front-rear direction having a two-stage upper and lower pressing plate portion to be fed to the receiving device, an elevating driving means for the driving tool, and a driving means for the pusher. The driving tool includes a driving tool body that can be moved up and down driven by a lifting drive means, an upper chuck that can be opened and closed on the driving tool body, and can be slidable in the vertical direction. A cylindrical shaft-shaped guide punch that is slidable in the vertical direction and urged downward by the urging means, and a crimping punch that is disposed inside the guide punch and is fixed to the driving tool body, The receiving device includes a receiving table on which the rivet member is placed, and an openable and closable lower chuck for positioning the rivet member which is configured to be synchronized with the lowering of the driving tool at a predetermined timing. In the state where the sheet-like member is interposed between the guide punch and the driving tool, the fitting member is pushed down by the guide punch to lower the rivet portion. Are inserted into the through hole of the fitting member, the tip end portion of the projection is struck and expanded in diameter, and the rivet member and the fitting member are sandwiched between the sheet-like member. In a snap fastener attaching machine adapted to be caulked to a state, a driving device for driving the driving tool is driven by a motor via a one-rotation clutch, a cam provided on the cam shaft, and the cam. Composed of a cam follower and an interlocking mechanism that converts the operation of the cam follower into the raising and lowering operation of the driving tool, and by forming a predetermined angle range on the cam surface into a circular shape, the cam shaft rotates once, A snap fastener attaching machine characterized in that the driving tool is configured to be stationary for a predetermined time in a state where the tip end portion of the protrusion of the rivet member is expanded and deformed.

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