CN110179216B

CN110179216B - Zipper teeth chain belt manufacturing device

Info

Publication number: CN110179216B
Application number: CN201810155263.8A
Authority: CN
Inventors: 长谷川元
Original assignee: YKK Corp
Current assignee: YKK Corp
Priority date: 2018-02-23
Filing date: 2018-02-23
Publication date: 2022-10-18
Anticipated expiration: 2038-02-23
Also published as: CN110179216A; TW201936288A; TWI674933B

Abstract

The invention provides a zipper teeth chain belt manufacturing device, which can improve the detection precision of the vertical direction position of a teeth pressing pad and maintain the forming precision of zipper teeth to be constant. The disclosed device is provided with: a cutting part for cutting the intermittently supplied wire; forming a head forming portion for engaging the head portion on the fastener element; and a caulking portion for attaching the fastener element to the fastener tape by caulking. The cutting part is provided with: a 1 st hammer disposed to be capable of reciprocating in the front-rear direction; a cutting die which is arranged at the front end part of the 1 st ram and is provided with a through hole; and a cutting punch that cooperates with the cutting die to cut the wire. The head forming section includes: a 2 nd hammer disposed to be capable of reciprocating in the up-down direction; a forming punch which is arranged at the lower end part of the 2 nd ram and forms a meshing head part on the zipper teeth; a forming die which is arranged at the front end part of the 1 st ram and receives the driving of a forming punch; a fastener element pressing pad for pressing a fastener element of the slide fastener; and at least one sensor for detecting the vertical position of the fastener element pressing pad.

Description

Zipper teeth chain belt manufacturing device

Technical Field

The present invention relates to a manufacturing apparatus of a fastener stringer of a slide fastener.

Background

As a conventional fastener stringer manufacturing apparatus, there is known an apparatus including: a cutting die (cutting die) having a wire insertion hole for a fastener element; a cutting punch which is arranged opposite to the upper surface of the cutting punch die and cuts the wire material for the zipper teeth; a forming die (forming die) for forming the coupling head on the fastener element; a forming punch which is arranged above the forming die and forms the engaging head on the zipper teeth; a fastener element pressing pad which presses the fastener element when the coupling head is formed by the forming punch; a plate spring for biasing the fastener pressing pad downward; and a proximity sensor provided above the leaf spring and detecting a position of the leaf spring in the vertical movement (see, for example, patent document 1).

Documents of the prior art

Patent document

Patent document 1: chinese patent No. 102319840

Disclosure of Invention

However, in the fastener stringer manufacturing apparatus described in patent document 1, the vertical position of the element pressing pad is detected by the proximity sensor through the leaf spring, but since the proximity sensor is disposed to be inclined with respect to the vertical direction in order to detect the tip end position of the leaf spring in the rotational movement, there is a possibility that the detection accuracy is low and the forming accuracy of the fastener element is lowered. In addition, the forming accuracy of the fastener element in this case is the accuracy of the thickness dimension of the fastener element.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a fastener stringer manufacturing apparatus capable of improving the detection accuracy of the vertical position of the element pressing pad and maintaining the forming accuracy of the fastener element at a constant level.

The above object of the present invention is achieved by the following structure.

(1) A fastener stringer manufacturing apparatus for manufacturing a fastener stringer by continuously attaching fastener elements along one side edge portion of a fastener tape, the fastener stringer manufacturing apparatus comprising: a cutting unit that cuts a wire material that is a material of the fastener element that is intermittently supplied; a head forming portion for forming an engaging head on the fastener element cut by the cutting portion; and a caulking portion that attaches the fastener element, in which the coupling head portion is formed by the head forming portion, to the fastener tape by caulking, the cutting portion including: a 1 st hammer which is provided so as to be capable of reciprocating in the front-rear direction; a cutting die which is arranged at the front end part of the No. 1 ram and is provided with a through insertion hole for inserting the wire; and a cutting punch provided opposite to the upper surface of the cutting die and cutting the wire rod in cooperation with the cutting die, wherein the head forming portion includes: a 2 nd hammer disposed to be freely reciprocated in the vertical direction; a forming punch provided at a lower end portion of the 2 nd striker for forming a coupling head on the fastener element; a forming die which is arranged at the front end part of the 1 st ram and is used for receiving the driving of the forming punch; a fastener element pressing pad which presses the fastener element when the coupling head is formed by the forming punch; and at least one sensor for detecting the vertical position of the fastener element pressing pad.

(2) The apparatus for manufacturing a fastener stringer according to (1), wherein the sensor is a sensor that detects a position in a vertical direction of the element pressing pad when the element pressing pad presses the fastener element.

(3) The apparatus for manufacturing a fastener stringer according to (2), wherein the head forming portion includes a detection member provided integrally with or separately from the element pressing pad, and the sensor detects a vertical position of the element pressing pad through the detection member.

(4) The apparatus for manufacturing a fastener stringer according to (1), wherein the sensor is a 1 st sensor for detecting a position in a vertical direction of the element pressing pad when the element pressing pad presses the fastener element, and a 2 nd sensor for detecting a position in a vertical direction of the element pressing pad when the element pressing pad does not press the fastener element.

(5) The fastener stringer manufacturing apparatus according to (4), wherein the head forming section includes a detection member provided integrally with or separately from the element pressing pad, and the 1 st sensor and the 2 nd sensor detect the vertical position of the element pressing pad via the detection member.

(6) The fastener stringer manufacturing apparatus according to any one of (1) to (5), wherein the element pressing pad presses the fastener element by an urging force of the compression coil spring.

Effects of the invention

According to the present invention, the head forming portion includes the 2 nd hammer provided to be movable reciprocally in the up-down direction, the forming punch provided at the lower end portion of the 2 nd hammer for forming the coupling head portion on the fastener element, the forming die provided at the front end portion of the 1 st hammer for receiving driving of the forming punch, the element pressing pad for pressing the fastener element when the coupling head portion is formed by the forming punch, and the at least one sensor for detecting the up-down direction position of the element pressing pad, so that the up-down direction position of the element pressing pad can be directly detected by the sensor. Therefore, the accuracy of detecting the vertical position of the element pressing pad can be improved, and the molding accuracy of the fastener element E can be maintained constant.

Drawings

Fig. 1 is a schematic perspective view illustrating an embodiment of a fastener stringer manufacturing apparatus according to the present invention.

Fig. 2 is a central longitudinal sectional side view of the fastener stringer manufacturing apparatus shown in fig. 1.

Fig. 3 is a perspective view of the cutting portion and the caulking portion shown in fig. 1.

Fig. 4 is a front view of the cutting portion and the caulking portion shown in fig. 3.

Fig. 5 is a plan view of the cutting portion and the caulking portion shown in fig. 3.

Fig. 6 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 4.

Fig. 7 is an enlarged cross-sectional view of the periphery of the cutting die of fig. 6.

Fig. 8 is an enlarged plan view of the periphery of the clinch portion of fig. 5.

Fig. 9 is an enlarged top view of the periphery of the cutting die of fig. 8.

Fig. 10 is a perspective view of the head forming section shown in fig. 1.

Fig. 11 is a front view of the head forming section shown in fig. 10.

Fig. 12 is a bottom view of the head forming section shown in fig. 10.

Fig. 13 is a sectional view taken along line B-B of fig. 11.

Fig. 14 is a schematic side view illustrating a state after the 1 st die advances.

Fig. 15 is a schematic side view illustrating a state where the 1 st die is retracted and the wire rod is cut.

Fig. 16 is a schematic side view illustrating a state where the 2 nd die moves downward to form the coupling head of the fastener element.

Fig. 17 is a schematic plan view of the state shown in fig. 16.

Fig. 18 is a schematic side view illustrating a state where the 1 st die advances and fastener elements are attached to the fastener tape.

Fig. 19 is a schematic plan view of the state shown in fig. 18.

Fig. 20 is a schematic front view illustrating a state in which fastener elements are chamfered by the left and right chamfering punches.

Fig. 21A is a side view illustrating an example of the fastener stringer.

Fig. 21B is a plan view of the fastener element of fig. 21A.

Description of the reference numerals

10. Zipper teeth chain belt manufacturing device

20. Cutting part

21. No. 1 ram

22. Cutting die

22a through hole

23. Cutting punch

24. Ram guide piece

30. No. 1 ram drive mechanism

31. Base part

31a support shaft

32. Rod

32A 1 st end

32B 2 nd end

32C 3 rd end

33. No. 1 driven roller

33a support shaft

34. No. 2 driven roller

34a support shaft

35. Connecting rod

35a rod side connecting shaft

35b ram side connecting shaft

40. Head forming part

41. No. 2 ram

42. Forming punch

43. Forming die

44. Zipper tooth pressing pad

45. Ram guide piece

46. Detected component

47. No. 1 displacement sensor

48. 2 nd displacement sensor (transducer)

50. No. 2 ram driving mechanism

51. Base part

51a support shaft

52. Rod

52A 1 st end

52B 2 nd end

52C 3 rd end

53. No. 1 driven roller

53a support shaft

54. No. 2 driven roller

54a support shaft

55. Connecting rod

55a rod side connecting shaft

55b ram side connecting shaft

56. Pad pushing mechanism

56a pressing pin

56b compression coil spring

56c spring receiver

60. Riveting part

61. Riveting punch

62. Chamfering punch

70. Punch driving part

72. Riveting punch guide

73. Chamfer punch guide

80. Drive shaft

81. Retreating cam

82. Advancing cam

83. Lower moving cam

84. Upper moving cam

FS zipper teeth chain belt

T zipper belt

E zipper tooth

E1 Engaging head

E2 Leg part

W wire rod

Detailed Description

Hereinafter, an embodiment of the fastener stringer manufacturing apparatus according to the present invention will be specifically described with reference to the drawings. In the following description, the upper side refers to the direction of arrow U in fig. 1, the lower side refers to the direction of arrow D in fig. 1, the front side refers to the direction of arrow Fr in fig. 1, the rear side refers to the direction of arrow Rr in fig. 1, the left side refers to the direction of arrow L in fig. 1, and the right side refers to the direction of arrow R in fig. 1. The left-right direction is also referred to as a width direction. The upstream side and the downstream side are based on the conveying direction of the fastener tape.

As shown in fig. 1 and 2, the fastener stringer manufacturing apparatus 10 of the present embodiment includes: a cutting section 20 for cutting the wire material W as a material of the fastener element E supplied intermittently; a head forming portion 40 for forming the coupling head E1 on the fastener element E cut by the cutting portion 20; and a caulking portion 60 for attaching the fastener element E, in which the coupling head E1 is formed by the head forming portion 40, to the fastener tape T by caulking. The fastener stringer manufacturing apparatus 10 is configured to continuously attach the fastener elements E along one side edge portion of the fastener tape T to manufacture the fastener stringer FS.

Here, the fastener stringer FS will be explained. As shown in fig. 21A and 21B, the fastener stringer FS includes a fastener tape T and a plurality of metal fastener elements E attached to one side edge portion of the fastener tape T. The fastener element E has an engagement head E1, and a pair of leg portions E2 extending from the engagement head E1. The engaging head E1 has an engaging convex portion E3 formed on one face and an engaging concave portion E4 formed on the other face.

As shown in fig. 2 to 6, the cutting unit 20 includes: a 1 st hammer 21 provided to be movable back and forth in a front-rear direction; a cutting die 22 provided at the tip end of the 1 st hammer 21 and having a insertion hole 22a through which the wire rod W is inserted; a cutting punch 23 provided opposite to the upper surface of the cutting die 22, and cutting the wire rod W in cooperation with the cutting die 22; and a hammer guide 24 that slidably supports the 1 st hammer 21 in the front-rear direction. The cutting punch 23 is attached to a ram guide 45 of the head forming portion 40 (see fig. 13). The hammer guide 24 is fixed to an apparatus frame, not shown.

As shown in fig. 2 and 10 to 13, the head forming section 40 includes: a 2 nd hammer 41 provided so as to be capable of reciprocating in the vertical direction; a forming punch 42 provided at a lower end portion of the 2 nd hammer 41, for forming a coupling head E1 on the fastener element E; a forming die 43 (see fig. 7) integrally provided in the cutting die 22 and receiving driving of the forming punch 42; a fastener element pressing pad 44 that presses the pair of leg portions E2 of the fastener element E when the coupling head is formed by the forming punch 42; and a hammer guide 45 that supports the 2 nd hammer 41 so as to be slidable in the vertical direction. The hammer guide 45 is fixed to an apparatus frame, not shown.

As shown in fig. 1 and 2, the fastener stringer manufacturing apparatus 10 includes: a drive shaft 80 for driving the 1 st hammer 21 of the cutting portion 20 and the 2 nd hammer 41 of the head forming portion 40; a 1 st hammer drive mechanism 30 that transmits the drive force of the drive shaft 80 to the 1 st hammer 21; a 2 nd hammer drive mechanism 50 that transmits the drive force of the drive shaft 80 to the 2 nd hammer 41; a wire material supply portion 100 that intermittently supplies the wire material W from below into the insertion hole 22a of the cutting die 22 by the thickness of the fastener element E; and a tape supplying portion 110 that intermittently supplies the fastener tape T from below to the front of the 1 st hammer 21.

The drive shaft 80 has: a pair of retreating cams 81 for retreating the 1 st hammer 21; an advancing cam 82 that advances the 1 st hammer 21; a pair of down cams 83 that move the 2 nd hammer 41 downward; a pair of up-moving cams 84 that move the 2 nd hammer 41 upward; a wire-feeding cam 85 for driving the wire-feeding unit 100; and a belt feeding cam 86 for driving the belt feeding unit 110.

As shown in fig. 1, the wire supply unit 100 includes: a feed roller 101 and a guide roller 102 for conveying the wire rod W; a driven roller 103 that contacts the wire feeding cam 85 of the drive shaft 80; a rod-shaped slider 104 supporting the driven roller 103 at one end; a pawl 105 mounted at the other end of the slider 104; a ratchet 106 intermittently rotated by a pawl 105 in only one direction by every predetermined angle; a transmission shaft 107 connecting the feed roller 101 with the ratchet 106; and a compression spring 108 for biasing the slider 104 toward the drive shaft 80.

As shown in fig. 1, the tape supply unit 110 includes: a feed roller 111 and a guide roller 112 for conveying the fastener tape T; a tape guide 113 for guiding the conveyed fastener tape T; a driven roller 114 that contacts the belt feeding cam 86 of the drive shaft 80; a swing arm 115 supporting the driven roller 114 at one end; a roller 116 supported at the other end of the rocker arm 115; a lever 117 which swings downward via the roller 116; a drive shaft 118 connecting the feed roller 111 with the lever 117; and a tension spring 119 for biasing the tip of the lever 117 upward. A one-way clutch, not shown, is provided between the lever 117 and the transmission shaft 118.

As shown in fig. 3 to 6, the 1 st hammer drive mechanism 30 includes: a base 31 fixed to an apparatus frame not shown; a lever 32 rotatably provided on the base 31 and having 1 st to 3 rd end portions 32A to 32C; a pair of 1 st driven rollers 33 rotatably provided at the 1 st end portion 32A of the lever 32; a 2 nd driven roller 34 rotatably provided at the 2 nd end 32B of the lever 32; and a link 35 having one end rotatably coupled to the 3 rd end portion 32C of the lever 32 and the other end rotatably coupled to the rear end portion of the 1 st hammer 21. Then, the pair of 1 st driven rollers 33 are respectively in contact with the pair of backward cams 81 of the drive shaft 80. In addition, a 2 nd driven roller 34 is in contact with an advancing cam 82 of the drive shaft 80.

The lever 32 is supported rotatably with respect to the base 31 by a support shaft 31 a. The pair of 1 st driven rollers 33 are supported rotatably with respect to the 1 st end portion 32A of the lever 32 by a support shaft 33 a. One 2 nd driven roller 34 is rotatably supported with respect to the 2 nd end portion 32B of the lever 32 by a support shaft 34 a. One end of the link 35 is rotatably coupled to the 3 rd end portion 32C of the lever 32 by a lever-side coupling shaft 35a, and the other end of the link 35 is rotatably coupled to the 1 st hammer 21 by a hammer-side coupling shaft 35 b.

The support shaft 33a supporting the 1 st driven roller 33 is formed as an eccentric shaft, and a portion supporting the 1 st driven roller 33 is eccentric with respect to a portion supported at the 1 st end 32A of the lever 32. Accordingly, the position of the 1 st driven roller 33 can be changed only by rotating the support shaft 33a with respect to the lever 32, and therefore, the contact state between the 1 st driven roller 33 and the reverse cam 81 of the drive shaft 80 can be easily adjusted.

A support shaft 34a supporting the 2 nd driven roller 34 is formed as an eccentric shaft, and a portion supporting the 2 nd driven roller 34 is eccentric with respect to a portion supported at the 2 nd end 32B of the lever 32. Accordingly, the position of the 2 nd driven roller 34 can be changed only by rotating the support shaft 34a with respect to the lever 32, and therefore, the contact state between the 2 nd driven roller 34 and the advancing cam 82 of the drive shaft 80 can be easily adjusted.

In the cutting unit 20 and the 1 st hammer drive mechanism 30 configured as described above, when the drive shaft 80 rotates and the cam top of the retraction cam 81 presses the 1 st driven roller 33 downward, the lever 32 rotates in the clockwise direction in fig. 6, and the 1 st hammer 21 retracts. Further, when the drive shaft 80 rotates, the cam top of the advance cam 82 presses the 2 nd driven roller 34 rearward, the lever 32 rotates in the counterclockwise direction in fig. 6, and the 1 st hammer 21 advances. Therefore, the 1 st hammer 21 reciprocates in the front-rear direction by the rotation of the drive shaft 80.

In the present embodiment, as shown in fig. 6, the rod-side coupling shaft 35a and the hammer-side coupling shaft 35b are arranged in parallel in a substantially straight line along the front-rear direction of the 1 st hammer 21. Therefore, the hammer side coupling shaft 35b, which is the input position of the driving force with respect to the 1 st hammer 21, can be brought close to the center of gravity of the 1 st hammer 21, whereby the movement of the 1 st hammer 21 in the front-rear direction can be stabilized.

In addition, in the present embodiment, since the reverse cam 81 for reversing the 1 st hammer 21 and the forward cam 82 for advancing the 1 st hammer 21 are separately provided on the drive shaft 80 and the 1 st driven roller 33 and the 2 nd driven roller 34 of the lever 32 are brought into contact with the reverse cam 81 and the forward cam 82, respectively, it is possible to improve the following property of the 1 st driven roller 33 and the 2 nd driven roller 34 with respect to the rotation of the drive shaft 80 at the time of high-speed driving, and thereby, it is possible to realize high-speed operation of the fastener stringer manufacturing apparatus 10.

As shown in fig. 10 to 13, the 2 nd hammer drive mechanism 50 includes: a base 51 fixed to an apparatus frame not shown; a lever 52 rotatably provided on the base 51 and having 1 st to 3 rd end portions 52A to 52C; a pair of 1 st driven rollers 53 rotatably provided at the 1 st end portion 52A of the lever 52; a pair of 2 nd driven rollers 54 rotatably provided at the 2 nd end portion 52B of the lever 52; and a link 55 having one end rotatably coupled to the 3 rd end portion 52C of the lever 52 and the other end rotatably coupled to the upper end portion of the 2 nd hammer 41. Then, the pair of 1 st driven rollers 53 are respectively in contact with the pair of down cams 83 of the drive shaft 80. In addition, the pair of 2 nd driven rollers 54 are respectively in contact with the pair of up-moving cams 84 of the drive shaft 80.

The lever 52 is supported rotatably with respect to the base 51 by a support shaft 51 a. The pair of 1 st driven rollers 53 are supported rotatably with respect to the 1 st end 52A of the lever 52 by a support shaft 53 a. The pair of 2 nd driven rollers 54 are supported rotatably with respect to the 2 nd end portion 52B of the lever 52 by a support shaft 54 a. An upper end of the link 55 is rotatably coupled to the 3 rd end portion 52C of the lever 52 by a lever-side coupling shaft 55a, and a lower end of the link 55 is rotatably coupled to the 2 nd hammer 41 by a hammer-side coupling shaft 55 b.

The support shaft 53a supporting the 1 st driven roller 53 is formed as an eccentric shaft, and a portion supporting the 1 st driven roller 53 is eccentric with respect to a portion supported at the 1 st end 52A of the lever 52. Therefore, by rotating the support shaft 53a serving as the eccentric shaft, the contact state between the 1 st driven roller 53 and the lower cam 83 of the drive shaft 80 can be adjusted.

A support shaft 54a supporting the 2 nd driven roller 54 is formed as an eccentric wheel, and a portion supporting the 2 nd driven roller 54 is eccentric with respect to a portion supported at the 2 nd end 52B of the lever 52. Therefore, by rotating the support shaft 54a as the eccentric shaft, the contact state between the 2 nd driven roller 54 and the upward cam 84 of the drive shaft 80 can be adjusted.

The rod-side connecting shaft 55a is formed as an eccentric shaft, and the portion supporting the upper end of the connecting rod 55 is eccentric with respect to the portion supported at the 3 rd end 52C of the rod 52. Therefore, by rotating the rod side connecting shaft 55a as the eccentric shaft, the vertical positions of the connecting rod 55, the 2 nd hammer 41, and the molding punch 42 can be changed, and the driving amount of the molding punch 42 with respect to the fastener element E can be adjusted.

In the head forming portion 40 and the 2 nd hammer driving mechanism 50 configured as described above, when the drive shaft 80 rotates and the cam top portion of the down cam 83 presses the 1 st driven roller 53 upward, the lever 52 rotates in the clockwise direction in fig. 13, and the 2 nd hammer 41 moves downward. Further, when the drive shaft 80 rotates, the cam top portion of the up cam 84 pushes the 2 nd driven roller 54 forward, and the lever 52 rotates in the counterclockwise direction in fig. 13, and the 2 nd hammer 41 moves upward. Therefore, the 2 nd hammer 41 reciprocates in the up-down direction by the rotation of the drive shaft 80.

In the present embodiment, as shown in fig. 13, the rod-side coupling shaft 55a and the hammer-side coupling shaft 55b are arranged in parallel along the vertical direction of the 2 nd hammer 41 in a substantially linear manner. Therefore, the lever-side coupling shaft 55a and the hammer-side coupling shaft 55b, which are input positions of the driving force with respect to the 2 nd hammer 41, can be brought close to the center of gravity of the 2 nd hammer 41, whereby the movement of the 2 nd hammer 41 in the vertical direction can be stabilized.

In addition, in the present embodiment, since the downward cam 83 for moving the 2 nd hammer 41 downward and the upward cam 84 for moving the 2 nd hammer 41 upward are provided separately on the driving shaft 80 and the 1 st driven roller 53 and the 2 nd driven roller 54 of the lever 52 are brought into contact with the downward cam 83 and the upward cam 84, respectively, the following property of the 1 st driven roller 53 and the 2 nd driven roller 54 with respect to the rotation of the driving shaft 80 at the time of high-speed driving can be improved, and thereby, high-speed operation of the fastener stringer manufacturing apparatus 10 can be realized.

As shown in fig. 3 to 7, the 1 st hammer 21 is attached at its leading end portion with a die holder 25 that holds the cutting die 22. In addition, the cutting die 22 is fixed to the front surface of the die holder 25 by a pair of holders 26.

As shown in fig. 7 and 9, the cutting die 22 includes a partition plate 27 attached to the die holder 25, and a die main body 28 attached to a front surface of the partition plate 27. A through groove 27a is formed in the front surface of the partition plate 27 along the vertical direction, and the through groove 27a constitutes a half of the through hole 22a through which the wire rod W is inserted. A cut groove 28a is formed in the rear surface of the die main body 28 in the vertical direction, and the cut groove 28a constitutes a half of the insertion hole 22a through which the wire rod W is inserted. The insertion hole 22a is formed by aligning the insertion groove 27a of the separator 27 and the slit groove 28a of the die main body 28 in the front-rear direction. The notch groove 28a is formed in the same shape as the outer peripheral surface of the fastener element E on the pair of leg portions E2 side.

As shown in fig. 13, the cutting punch 23 is mounted on the front surface of the lower end portion of the hammer guide 45 of the head forming portion 40. The cutting punch 23 is disposed such that the lower surface thereof is in sliding contact with the upper surface of the cutting die 22. Further, a cutting recess 23a having the same shape as the outer peripheral surface of the fastener element E on the coupling head E1 side is formed at the tip end portion of the cutting punch 23.

As shown in fig. 10, 11, and 13, a punch holder 41a holding a forming punch 42 is attached to a front surface of a lower end portion of the 2 nd hammer 41. A pad holder 41b to which the element pressing pad 44 is attached to the front surface of the punch holder 41a. The element pressing pad 44 is provided between the punch holder 41a and the pad holder 41b so as to be slidable in the vertical direction.

As shown in fig. 7 and 9, the forming die 43 is formed integrally with the die main body 28 of the cutting die 22, and a forming concave portion 43a into which the coupling head E1 of the fastener element E is fitted is formed at a distal end portion of the forming die 43.

As shown in fig. 13, the 2 nd hammer driving mechanism 50 is provided with a pad pressing mechanism 56 that presses the element pressing pad 44 downward. The pad pressing mechanism 56 includes: a pressing pin 56a provided on the link 55 so as to be slidable in the vertical direction and abutting against the upper end surface of the element pressing pad 44; a pair of compression coil springs 56b for pressing the pressing pin 56a downward; and a spring receiving portion 56c fixed to an upper surface of the link 55 and receiving upper end portions of the pair of compression coil springs 56 b. Therefore, the element pressing pad 44 is configured to press the fastener element E by the biasing force of the pair of compression coil springs 56 b. The pressing pin 56a is inserted into a guide hole 55c formed along the longitudinal direction (vertical direction) of the link 55 at the widthwise center of the link 55.

The pressing pin 56a operates to absorb the dimension of upward movement of the element pressing pad 44 when the 2 nd hammer 41 (forming punch 42) moves downward and the element pressing pad 44 presses the fastener element E (see fig. 16).

In the element pressing pad 44 and the pad pressing mechanism 56 configured as described above, since the element pressing pad 44 is always pressed downward by the pad pressing mechanism 56, the following property of the up-and-down movement of the element pressing pad 44 with respect to the 2 nd hammer 41 during high-speed driving can be improved, and thereby, high-speed operation of the fastener stringer manufacturing apparatus 10 can be realized. Further, since the fastener element E can be reliably pressed by the element pressing pad 44, the molding accuracy of the coupling head E1 of the fastener element E can be maintained constant. The spring receiving portion 56c fixed to the upper surface of the link 55 has rigidity. Therefore, even if the pressing pin 56a inserted into the insertion hole 55c moves upward toward the spring receiving portion 56c, the spring receiving portion 56c does not move upward away from the upper surface of the link 55 or deform.

As shown in fig. 10 and 11, the head forming section 40 of the present embodiment further includes: a detection member 46 attached to the right side surface of the element pressing pad 44; a 1 st displacement sensor 47 that detects a vertical position of the detection member 46 and detects a vertical position of the element pressing pad 44 when the 2 nd hammer 41 moves downward and the element pressing pad 44 presses the fastener element E; and a 2 nd displacement sensor 48 that detects a vertical position of the detection member 46 and detects a vertical position of the element pressing pad 44 when the 2 nd hammer 41 moves upward and the element pressing pad 44 does not press the fastener element E.

The 1 st displacement sensor 47 is a proximity sensor that detects a distance to the lower surface of the detection target member 46, and is disposed so as to face the lower surface of the detection target member 46. The 2 nd displacement sensor 48 is a proximity sensor that detects a distance to the upper surface of the detection target member 46, and is disposed so as to face the upper surface of the detection target member 46. The 1 st and 2

nd displacement sensors

47 and 48 are fixed to an apparatus frame, not shown, by

holders

47a and 48 a.

In the head forming portion 40 configured as described above, since the vertical position of the element pressing pad 44 when the element pressing pad 44 presses the fastener element E is detected by the 1 st displacement sensor 47, the plate thickness (vertical dimension) of each fastener element E attached to the fastener tape T can be measured. Therefore, it is possible to check whether or not the plate thickness of the fastener element E falls within a predetermined range, and it is possible to maintain the forming accuracy of the fastener element E constant. The 1 st displacement sensor 47 also detects the vertical position of the element pressing pad 44, thereby checking whether or not the fastener element E is present and whether or not a plurality of fastener elements E overlap. Thus, the 1 st displacement sensor 47 can detect the overload applied to the fastener element pressing pad 44, and stop the fastener stringer manufacturing apparatus 10.

Further, since the 2 nd displacement sensor 48 detects the vertical position of the element pressing pad 44 when the element pressing pad 44 does not press the fastener element E, the adjustment amount when the driving amount of the molding punch 42 to the fastener element E is adjusted can be digitized (digitalized). This is because the element pressing pad 44 moves integrally with the molding punch 42 when the element pressing pad 44 does not press the fastener element E. Therefore, the driving adjustment amount of the forming punch 42 can be digitized, and the driving amount of the forming punch 42 can be easily adjusted. In the conventional device described in patent document 1, it is necessary to experimentally drive the device a plurality of times, and to measure the actual driving amount for each driving to gradually adjust the driving amount.

As shown in fig. 3 to 5 and 8, the caulking portion 60 includes: a pair of caulking punches 61 provided on the upper surface of the die holder 25 of the 1 st hammer 21 for caulking the pair of leg portions E2 of the fastener element E; a pair of chamfering punches 62 provided on the upper surface of the die holder 25 of the 1 st hammer 21 and chamfering the fastener elements E; and a pair of punch driving portions 70 that drive the pair of caulking punches 61 and the pair of chamfering punches 62.

The pair of caulking punches 61 and the pair of chamfering punches 62 are provided slidably in the left-right direction by a punch guide base 65 and a punch guide case 66 (see fig. 6) attached to the upper surface of the die holder 25 of the 1 st hammer 21. The punch guide case 66 is formed so as to cover the upper portions of the swaging punch 61, the chamfering punch 62, and the punch guide base 65.

As shown in fig. 8 and 9, the caulking punch 61 includes: a recess 61a formed at an inner end thereof and into which a leg E2 of the fastener element E is fitted; and a guided surface 61b formed on the outer end thereof, which is in contact with a guide surface 72a of a swaging punch guide 72 described later, and which advances the swaging punch 61 inward in the width direction. The guided surface 61b is a surface inclined so as to face forward. The caulking punch 61 is always urged outward in the width direction by a compression spring 61c disposed inside thereof.

As shown in fig. 8 and 9, the chamfering punch 62 includes: a concave chamfered portion 62a formed at an inner end thereof and chamfering a corner of the fastener element E; and a guided surface 62b formed on the outer end portion thereof, which is in contact with a guide surface 73a of a chamfering punch guide 73 described later, and which advances the chamfering punch 62 inward in the width direction. The guided surface 62b is a surface inclined so as to face forward. The chamfering punch 62 is always urged outward in the width direction by a compression spring 62c disposed inside thereof.

As shown in fig. 8, the chamfering punch 62 is disposed so as to overlap the caulking punch 61. The chamfering punch 62 is disposed along a direction orthogonal to the sliding direction of the 1 st hammer 21, and the caulking punch 61 is disposed obliquely to the chamfering punch 62. Therefore, the caulking punch 61 and the chamfering punch 62 are disposed so as to intersect with each other in the sliding direction.

As shown in fig. 5 and 8, the punch driving section 70 is disposed outside the caulking punch 61 and the chamfering punch 62 in the width direction, and includes: a casing 71 fixed to a device frame not shown; a caulking punch guide 72 disposed in the housing 71 and driving the caulking punch 61; a chamfering punch guide 73 disposed in the housing 71 and driving the chamfering punch 62; and a cover 74 closing an upper opening of the housing 71.

The caulking punch guide 72 is provided to the housing 71 so as to be slidable in the left-right direction and fixable at an arbitrary position. Further, a guide surface 72a that comes into contact with the guided surface 61b of the clinching punch 61 when the 1 st hammer 21 advances is formed at the inner end portion of the clinching punch guide 72.

The chamfering punch guide 73 is disposed adjacent to the front side of the caulking punch guide 72, and is provided in the housing 71 so as to be slidable in the left-right direction and fixable at an arbitrary position. Further, at the inner end portion of the chamfering punch guide 73, a guide surface 73a is formed which comes into contact with the guided surface 62b of the chamfering punch 62 when the 1 st hammer 21 advances.

In the thus configured caulking portion 60, when the 1 st striker 21 advances, the guided surfaces 61b of the left and right caulking punches 61 come into contact with the guide surfaces 72a of the left and right caulking punch guides 72, the left and right caulking punches 61 advance inward in the width direction, and the pair of leg portions E2 of the fastener element E fitted in the recessed portions 61a of the left and right caulking punches 61 are caulked, whereby the fastener element E is attached to the fastener tape T (see fig. 19).

Further, when the 1 st hammer 21 advances, the guided surfaces 62b of the left and right chamfering punches 62 come into contact with the guide surfaces 73a of the left and right chamfering punch guides 73, the left and right chamfering punches 62 advance inward in the width direction, and the corner portion of the fastener element Eb attached to the fastener tape T immediately before the fastener element Ea attached to the fastener tape T is chamfered by the chamfering portion 62a of the chamfering punch 62 (see fig. 20).

Next, the operation of the fastener stringer manufacturing apparatus 10 will be described with reference to fig. 14 to 20.

First, fig. 14 is a state in which the fastener element E is attached to the fastener tape T in a state in which the 1 st hammer 21 has advanced. At this time, the wire W is supplied to the insertion hole 22a of the cutting die 22 by the wire supply portion 100 by the thickness of the fastener element E, and the wire W protrudes on the cutting die 22 by the thickness of the fastener element E.

Next, as shown in fig. 15, the 1 st hammer 21 is retracted, and the wire W sandwiched between the insertion hole 22a of the cutting die 22 and the cutting recess 23a of the cutting punch 23 is cut into the fastener element E having a predetermined thickness. Then, the 1 st hammer 21 is further retracted, so that the coupling head portion E1 of the fastener element E is fitted into the molding recess 43a of the molding die 43, and the pair of leg portions E2 of the fastener element E are fitted into the recess portions 61a of the left and right caulking punches 61 of the caulking portion 60, respectively. Thereby, the fastener element E is fitted into and held by the molding recess 43a of the molding die 43 and the recesses 61a of the right and left caulking punches 61. At this time, the fastener tape T having the same thickness as the two fastener elements E is conveyed upward by the tape supply section 110.

Next, as shown in fig. 16 and 17, the 2 nd hammer 41 moves downward, the element pressing pad 44 presses the pair of leg portions E2 of the fastener element E downward, and the forming punch 42 scores the coupling head E1 of the fastener element E, thereby forming the coupling convex portion E3 and the coupling concave portion E4 in the coupling head E1 of the fastener element E. The engaging convex portion E3 is formed by the forming concave portion 43a of the forming die 43, and the engaging concave portion E4 is formed by the front end portion of the forming punch 42. In addition, the 2 nd hammer 41 moves upward quickly after the engagement head E1 is formed.

At this time, the thickness of the fastener element E is measured by the 1 st displacement sensor 47 via the element pressing pad 44, and it is checked whether the thickness falls within a predetermined range. Further, the 1 st displacement sensor 47 also performs a check of the presence or absence of the fastener element E and a check of whether or not a plurality of fastener elements E overlap.

Next, as shown in fig. 18 and 19, the 1 st ram 21 is advanced to move the fastener element E toward one side edge portion of the fastener tape T, and the one side edge portion of the fastener tape T is inserted between the pair of leg portions E2, and the pair of leg portions E2 are respectively caulked to the fastener tape T side by the left and right caulking punches 61 of the caulking portion 60 advanced inward in the width direction, thereby attaching the fastener element E to the one side edge portion of the fastener tape T.

At this time, as shown in fig. 20, since the left and right chamfering punches 62 advance inward in the width direction together with the left and right caulking punches 61, the corner portion of the fastener element Eb attached to the fastener tape T immediately before the fastener element Ea attached to the fastener tape T is chamfered by the chamfering portion 62a of the chamfering punch 62. Thereafter, the above operation is repeated, whereby the fastener elements E are continuously attached to one side edge portion of the fastener tape T.

As described above, according to the fastener stringer manufacturing apparatus 10 of the present embodiment, the head forming unit 40 includes: a 2 nd hammer 41 provided so as to be movable in a reciprocating manner in the vertical direction; a forming punch 42 provided at a lower end portion of the 2 nd hammer 41 for forming the coupling head E1 on the fastener element E; a forming die 43 provided at the tip of the 1 st ram 21 and receiving the driving of the forming punch 42; an element pressing pad 44 that presses the fastener element E when the coupling head is formed by the forming punch 42; and a 1 st displacement sensor 47 that detects a vertical position of the element pressing pad 44 when the element pressing pad 44 presses the fastener element E, so that the vertical position of the element pressing pad 44 can be directly detected by the 1 st displacement sensor 47. Therefore, the detection accuracy of the vertical position of the element pressing pad 44 can be improved, and the molding accuracy of the fastener element E can be maintained constant.

Further, according to the fastener stringer manufacturing apparatus 10 of the present embodiment, since the 2 nd displacement sensor 48 is provided and the 2 nd displacement sensor 48 detects the vertical position of the element pressing pad 44 when the element pressing pad 44 does not press the fastener element E, the adjustment amount at the time of adjusting the driving amount of the molding punch 42 to the fastener element E can be digitalized (digitized). Therefore, the 2 nd displacement sensor 48 can detect the position of the forming punch 42 at the current time with respect to the appropriate reference position of the forming punch 42, and can know the adjustment amount required to move and adjust the position of the forming punch 42. The position of the forming punch 42 can be digitized (digitized) and displayed by a numerical display mechanism including a monitor, a screen, and the like, the position of the forming punch 42 is adjusted by moving the position by a not-shown position adjustment mechanism of the forming punch 42, and the adjustment amount is confirmed by the numerical display mechanism. That is, since the driving adjustment amount of the forming punch 42 can be digitized, the driving amount of the forming punch 42 can be easily adjusted.

In addition, according to the fastener stringer manufacturing apparatus 10 of the present embodiment, the element pressing pad 44 presses the fastener element E by the biasing force of the compression coil spring 56b, and therefore, even if the compression coil spring 56b is worn, the biasing force is not easily changed because the spring constant of the compression coil spring is small. Therefore, the pressing force of the element pressing pad 44 is less likely to change, and the molding accuracy of the fastener element E can be stabilized. In the conventional device described in patent document 1, the element pressing pad presses the fastener element by the biasing force of the leaf spring, and therefore, when the leaf spring is worn, the biasing force is likely to change because the spring constant of the leaf spring is large. Therefore, the pressing force of the element pressing pad is likely to change, and the molding accuracy of the fastener element E may become unstable. Further, in the structure using the conventional leaf spring, the leaf spring and the pressing pin always rub against each other, and therefore, the leaf spring and the pressing pin are easily worn.

Further, according to the fastener stringer manufacturing apparatus 10 of the present embodiment, the rod side coupling shaft 55a that couples the 3 rd end portion 52C of the rod 52 to the upper end of the link 55 is an eccentric shaft, and therefore, the vertical positions of the link 55, the 2 nd striker 41, and the forming punch 42 can be changed by simply rotating the rod side coupling shaft 55a, and thus, the driving amount of the forming punch 42 with respect to the fastener element E can be easily adjusted.

The present invention is not limited to the embodiments described above, and can be modified as appropriate without departing from the scope of the present invention.

For example, in the above embodiment, the detection member 46 is provided separately from the element pressing pad 44, but is not limited thereto, and may be formed integrally with the element pressing pad 44.

In the above embodiment, the 1 st displacement sensor 47 and the 2 nd displacement sensor 48 are provided, but the present invention is not limited thereto, and the 2 nd displacement sensor 48 may not be provided.

In the above embodiment, the 1 st displacement sensor 47 that detects the vertical position of the element pressing pad 44 when the element pressing pad 44 presses the fastener element E and the 2 nd displacement sensor 48 that detects the vertical position of the element pressing pad 44 when the element pressing pad 44 does not press the fastener element E are provided, but the present invention is not limited to this, and the vertical position of the element pressing pad 44 in both cases when the element pressing pad 44 presses the fastener element E and when the element pressing pad 44 does not press the fastener element E may be detected by one displacement sensor.

Claims

1. A fastener stringer manufacturing apparatus for manufacturing a Fastener Stringer (FS) by continuously attaching fastener elements (E) along one side edge portion of a fastener tape (T), the fastener stringer manufacturing apparatus (10) comprising:

a cutting unit (20) that cuts a wire (W) that is a material of the fastener element (E) that is intermittently supplied;

a head forming section (40) for forming an engaging head (E1) on the fastener element (E) cut by the cutting section (20); and

a caulking section (60) that attaches the fastener element (E) formed with the coupling head section (E1) by the head section forming section (40) to the fastener tape (T) by caulking,

the cutting unit (20) is provided with:

a 1 st hammer (21) which is provided in a manner of freely reciprocating along the front-back direction;

a cutting die (22) provided at the tip of the 1 st ram (21) and having a insertion hole (22 a) through which the wire (W) is inserted; and

a cutting punch (23) that is provided opposite to an upper surface of the cutting die (22) and cuts the wire rod (W) in cooperation with the cutting die (22),

the head forming section (40) includes:

a 2 nd hammer (41) which is provided in a manner of freely reciprocating in the vertical direction;

a forming punch (42) provided at a lower end portion of the 2 nd hammer (41) for forming an engaging head (E1) on the fastener element (E);

a forming die (43) which is provided at the tip of the 1 st ram (21) and receives driving of the forming punch (42);

a fastener element pressing pad (44) that presses the fastener element (E) when the coupling head is formed by the forming punch (42); and

at least one sensor (47, 48) that detects the vertical position of the fastener element pressing pad (44),

the sensor includes:

a 1 st sensor (47) that detects a vertical position of the element pressing pad (44) when the element pressing pad (44) presses the fastener element (E); and

and a 2 nd sensor (48) that detects a vertical position of the element pressing pad (44) when the 2 nd hammer (41) moves upward and the element pressing pad (44) does not press the fastener element (E).

2. The fastener stringer manufacturing apparatus (10) according to claim 1,

the sensor is a sensor (47) that detects a vertical position of the element pressing pad (44) when the element pressing pad (44) presses the fastener element (E).

3. The fastener stringer manufacturing apparatus (10) according to claim 2,

the head forming part (40) is provided with a detected member (46) which is integrally or separately provided with the fastener element pressing pad (44),

the sensor (47) detects the vertical position of the element pressing pad (44) via the detection member (46).

4. The fastener stringer manufacturing apparatus (10) according to claim 1,

the 1 st sensor (47) and the 2 nd sensor (48) detect the vertical position of the element pressing pad (44) via the detection member (46).

5. The fastener stringer manufacturing apparatus (10) according to any one of claims 1 to 4,

the element pressing pad (44) presses the fastener element (E) by the biasing force of a compression coil spring (56 b).