TWI609647B - Stamping device of line material for fastener element formation - Google Patents

Abstract

A press forming apparatus for a wire for forming a fastener element includes: a drive gear and a driven gear that mesh with each other; and a pair of press forming rolls and press forming rolls having a flat cross-sectional portion forming portion and a flat cross-sectional portion forming portion on the outer peripheral surface, and Each gear and gear rotates coaxially and integrally. A circular hole portion is formed in the drive gear, and a long hole portion is formed in the press forming roller, the first shaft of the eccentric pin is inserted into the round hole portion, and the second shaft of the eccentric pin is inserted into the long hole portion, by making the eccentric pin in the round hole The inside of the unit is rotated to adjust the phase of the pair of press forming rolls and the press forming rolls in the circumferential direction. Thereby, the circumferential direction shift or the inter-axis distance between the pair of press forming rolls can be easily adjusted, and an engaging head excellent in the meshing performance can be formed.

Description

Stamping forming device for wire for forming zipper element

The present invention relates to a press forming apparatus for a wire for forming a fastener element, and more particularly to a fastener element for forming a meshing head on a synthetic resin monofilament by a pair of press forming rolls. A press forming device for forming a wire.

In the past, various press forming apparatuses have been proposed in which a wire for fastener element molding is sandwiched between a pair of press forming rolls having a flat cross-sectional portion forming portion on the outer peripheral surface, and a meshing head is formed (for example, see Patent Document 1). And patent document 2). For example, Patent Document 1 discloses that a flat cross-sectional portion and an engaging portion are formed in an engaging head portion of a continuous sprocket row formed by press forming, and when the meshing sprocket row is engaged, the engaging portion is engaged to be formed adjacent to each other. The meshing head of the fastener element has a slight gap between the upper and lower leg portions, so that it can be surely engaged, and a fastener element excellent in durability can be manufactured.

[Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. Hei 11-342547

[Patent Document 2] Japanese Patent Laid-Open Publication No. 59-11804

In addition, when the zipper element forming wire is sandwiched between a pair of press forming rolls having a flat cross-sectional portion forming portion on the outer peripheral surface to form the meshing head, if there is a circumferential deviation between the pair of press forming rolls When the shift is made or the distance between the shafts is not set to a suitable distance, the engaging head of the desired shape cannot be formed. Previously, the adjustment of the circumferential direction or the distance between the axes between a pair of press forming rolls was to loosen the fixing bolts and fine-tune using a magnifying glass. However, there is a problem that the fine adjustment is difficult to perform and the positional offset occurs when the fixing bolt is tightened after the adjustment, and it is difficult to perform the adjustment accurately without a skilled person. The adjustment of the circumferential direction and the inter-axis distance between the pair of press forming rolls is not described in any of the patent documents.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a press forming apparatus for a wire for forming a fastener element, which can easily adjust a circumferential direction shift or an inter-axis distance between a pair of press forming rolls, and can form an engagement Excellent performance of the meshing head.

The object of the present invention is achieved by the following constitution.

(1) A press forming apparatus for a wire for forming a fastener element comprising: a drive gear and a driven gear that mesh with each other; and a pair of press forming rolls that are rotatable integrally with the respective gears and disposed coaxially with the respective gears, By the rotation of the drive gear and the driven gear, at least the meshing head of the fastener element is formed at a predetermined interval on the fastener element forming wire which is continuously supplied with the pair of press forming rolls, the fastener element The press forming apparatus for forming a wire is characterized in that a round hole portion is formed in one of a gear of the drive gear and the driven gear and a press forming roll that rotates integrally with the gear, in the gear The other of the press forming rolls has a long hole portion formed therein, and an eccentric pin having a first shaft inserted into the circular hole portion and inserted into the long hole portion and eccentrically coupled to the first shaft In the second axis, the eccentric pin is rotated in the circular hole portion, and the relative position of the gear and the press forming roller is finely adjusted, thereby adjusting the phase of the pair of press forming rolls in the circumferential direction.

(2) The press forming apparatus for a wire for forming a fastener element according to (1), wherein a driven shaft supporting the drive gear and a press forming roll, and a driven shaft supporting the driven gear are One of the press forming rolls is provided with an eccentric ring whose thickness varies across the circumferential direction, so that the eccentric ring rotates relative to the drive shaft or the driven shaft, and the center of rotation of the press forming roll is relative to the drive shaft or The axis of the driven shaft is moved, thereby adjusting the distance between the pair of press forming rolls.

(3) The press forming device for a wire for forming a fastener element according to the above aspect, wherein the driven gear has a first driven gear and a second driven gear, and the first driven The gear and the second driven gear are divided in the axial direction and rotatable relative to each other, and are fitted to the driven shaft via an eccentric ring, and the press forming device for the wire for forming the fastener element includes an elastic member, which The driven gear and the second driven gear are biased in opposite directions to each other in the circumferential direction.

(4) The press forming apparatus for a wire for forming a fastener element according to the above aspect, wherein the drive shaft and the driven shaft have a fixed distance between the cores at least one end of which is fixed to the support plate. axis.

A press forming apparatus for a wire for forming a fastener element according to the present invention includes: a drive gear and a driven gear that mesh with each other, and a pair of press forming rolls having a flat cross-sectional portion forming portion on the outer peripheral surface and integrally rotating coaxially with each of the gears a circular hole portion is formed on one of a gear of the drive gear and the driven gear, and a press forming roller that rotates integrally with the gear, and an elongated hole portion is formed on the other, and the eccentric pin The first shaft is inserted into the circular hole portion, and the second shaft is inserted into the long hole portion. Therefore, by rotating the eccentric pin in the circular hole portion, the phase adjustment of the pair of press forming rolls in the circumferential direction is performed, and a pair of punching can be performed. The phases of the flat section forming portions of the forming rolls are finely adjusted and aligned. Thereby, it is possible to form an engaging head of a correct shape having excellent meshing performance in the wire for fastener element molding.

1‧‧‧ zipper chain forming wire

2‧‧‧Meshing head

10‧‧‧Compression forming device for wire for zipper element forming

11‧‧‧Drive shaft

11a, 12a‧‧‧ end

11b, 12b‧‧‧ the other end

11c, 12c‧‧‧ Large Path Department

11d‧‧‧Medium Department

11e, 12d‧‧‧ Small Trails Department

12‧‧‧ driven shaft

13‧‧‧1st support plate (support plate)

14, 15, 17, 18‧‧‧ support holes

16‧‧‧2nd support plate (support plate)

22‧‧‧ push ring

31‧‧‧First stamping forming roll (press forming roll)

32‧‧‧Second press forming roll (press forming roll)

33‧‧‧Long hole department

34a‧‧‧ round hole

34b‧‧‧ Large diameter hole

35‧‧‧eccentric pin

35a‧‧‧1st axis

35b‧‧‧2nd axis

35c‧‧‧锷

35d‧‧‧ slot

36‧‧‧Eccentric ring

36a‧‧‧Inner diameter

36b‧‧‧OD

36c, 43c‧‧·wheel hub

41‧‧‧ drive gear

42‧‧‧ driven gear

43‧‧‧1st driven gear

44‧‧‧2nd driven gear

45, 46‧‧‧ card sales

45a, 46a‧‧ ‧ spring slot

47‧‧‧Elastic members (stretching coil springs)

48‧‧‧ ring members

51, 52‧‧‧ flat section forming part

60, 61‧‧‧ Guide members

C‧‧‧ gap

D1‧‧‧Axis of the driven shaft (shaft of the drive shaft or driven shaft)

D2‧‧‧The center of rotation of the stamping roll

L‧‧‧Distance between the first press forming roll and the second press forming roll

L1, L2‧‧‧ axis

Fig. 1 is a plan view showing a press forming apparatus for a wire for forming a fastener element of the present invention.

FIG. 2 is a perspective view of the press forming apparatus for the fastener element for forming a fastener element shown in FIG. 1 as seen from the front side.

FIG. 3 is a perspective view of the press forming apparatus for the fastener element for forming a fastener element shown in FIG. 1 as seen from the back side.

Fig. 4 (a) is a front view of a press forming apparatus for a wire for forming a fastener element shown in Fig. 1, and Fig. 4 (b) is a rear view of the press forming apparatus for the wire for forming a fastener element shown in Fig. 3.

5(a) is a cross-sectional view taken along line V-V of FIG. 1, FIG. 5(b) is a cross-sectional view taken along line V'-V' of FIG. 1, and FIG. 5(c) is an enlarged cross-sectional view of the eccentric pin.

Figure 6(a) is a cross-sectional view taken along line VI-VI of Figure 1, Figure 6(b) is an enlarged cross-sectional view of VI" of Figure 6(a), and Figure 6(c) is a line VI'-VI' of Figure 1 Fig. 6(d) is an enlarged cross-sectional view taken along line VI'' of Fig. 6(c).

Fig. 7 is a sectional view taken along line VII-VII of Fig. 1;

(a) and (b) of FIG. 8 are explanatory views showing a state in which the backlash is adjusted by the first driven gear and the second driven gear.

FIG. 9 is a front view showing a state in which the meshing head is formed on the fastener element forming wire at a predetermined interval by a pair of press forming rolls.

Hereinafter, an embodiment of a press forming apparatus for a wire for forming a fastener element of the present invention will be described in detail based on the drawings.

First, an outline of a press forming apparatus 10 for a wire for forming a fastener element will be described.

As shown in FIG. 1 to FIG. 3, the press forming apparatus 10 for the wire element for fastener element molding of the present embodiment includes an annular first press forming roll 31 that is rotatably supported by the drive shaft 11, and is rotatably supported. An annular second press forming roll 32 of the driven shaft 12. On the side surface of the first press forming roll 31, the drive gear 41 disposed around the drive shaft 11 is fixed coaxially with the first press forming roll 31, and is disposed around the driven shaft 12 on the side surface of the second press forming roll 32. The driven gear 42 and the second press forming roll 32 are fixed coaxially.

As shown in FIGS. 1 and 5(a), 5(b), and 5(c), the drive shaft 11 and the one end 11a and the one end 12a of the driven shaft 12 are fitted and screwed to the first support plate 13 The support hole 14 and the support hole 15 are fitted, and the other end 11b and the other end 12b of the drive shaft 11 and the driven shaft 12 are fitted and screwed to the support hole 17 and the support hole 18 provided in the second support plate 16. That is, the drive shaft 11 and the driven shaft 12 are fixed shafts whose distance between the shafts is constant and are arranged in parallel with each other.

Further, the drive shaft 11 has a large diameter portion 11c, a medium diameter portion 11d, and a small diameter portion 11e having different outer diameters from one end 11a to the other end 11b. On the other hand, the driven shaft 12 has between the one end 12a and the other end 12b. The large diameter portion 12c and the small diameter portion 12d having different outer diameters.

Further, as shown in FIGS. 5( a ) to 5 ( c ), the first press forming roll 31 is disposed around the intermediate diameter portion 11 d of the drive shaft 11 and is positioned in the axial direction on the large diameter portion of the drive shaft 11 . 11c is between the thrust ring 22. Further, the second press forming roll 32 is disposed on the periphery of the eccentric ring 36 which is externally fitted to the driven shaft 12, which will be described later. It is positioned between the large diameter portion 12c of the driven shaft 12 and the hub portion 36c of the eccentric ring 36 to be described later in the axial direction.

The first press forming roll 31 and the drive gear 41, and the second press forming roll 32 and the first driven gear 43 are respectively fastened by a fastening member (not shown) and integrally rotated.

In addition, when the phase adjustment of the first press forming roll 31 and the second press forming roll 32 to be described later or the distance between the cores of the first press forming roll 31 and the second press forming roll 32 is adjusted, the fastening members are respectively release.

The drive gear 41 and the driven gear 42 that mesh with each other drive the driven gear 42 by the rotation of the drive gear 41, and the first press forming roll 31 and the second press forming roll 32 rotate in opposite directions in synchronization with each other.

On the outer circumferential surfaces of the first press forming rolls 31 and the second press forming rolls 32, a plurality of flat cross-sectional portion forming portions 51 and flat cross-sectional portion forming portions 52 projecting at predetermined intervals are provided in a gear shape. The first press forming roll 31 and the second press forming roll 32 which are disposed to face each other with a predetermined gap therebetween are rotated in synchronization, and the fastener element forming wire 1 is inserted between the flat cross-sectional portion forming portion 51 and the flat cross-sectional portion forming portion 52. By the nip, the fastener element forming wire 1 is partially deformed into a flat state at a predetermined interval, thereby forming the meshing head 2 of the element (see FIG. 9).

Here, as shown in FIGS. 5( a ) to 5 ( c ) and FIGS. 6( a ) to 6 ( d ), the first press forming roll 31 has a length in the radial direction of the first press forming roll 31 . The long hole portion 33 of the shaft is formed to penetrate the axial direction. Further, the drive gear 41 is formed at a position corresponding to the long hole portion 33 so that the circular hole portion 34a penetrates the axial direction. eccentric The pin 35 is fitted to the long hole portion 33 and the circular hole portion 34a. The eccentric pin 35 has a cylindrical first shaft 35a and a second shaft 35b whose axis L1 and the axis L2 are eccentric to each other. A crotch portion 35c concentric with the first shaft 35a is provided between the first shaft 35a and the second shaft 35b, and is disposed to be rotatable in the large diameter hole portion 34b formed adjacent to the circular hole portion 34a. Further, a groove 35d for mounting a tool (not shown) such as a driver when the eccentric pin 35 is rotated is provided on the end surface of the first shaft 35a that is fitted to the circular hole portion 34a.

On the other hand, on the second press forming roll 32 side, the thickness gradually changes in the circumferential direction on the driven shaft 12, and the center of the inner diameter 36a is fitted to the eccentric ring 36 which is eccentric to the center of the outer diameter 36b. The eccentric ring 36 is provided with a hub portion 36c having the same thickness at one end in the axial direction, and an internal thread and a working hole (not shown) are formed in the boss portion 36c in the radial direction, and are not shown in the internal thread. The fixing screw fixes the eccentric ring 36 to the driven shaft 12. The fixing of the eccentric ring 36 and the driven shaft 12 by the fixing screw is released, whereby the eccentric ring 36 is relatively rotatable relative to the driven shaft 12. A tool (not shown) for rotating the eccentric ring 36 is inserted into the working hole.

The driven gear 42 includes a first driven gear 43 that is fixed to the second press forming roll 32, and a second driven gear 44 that is rotatably fitted to the hub portion 43c of the first driven gear 43 and is relatively The first driven gear 43 is disposed adjacent to each other in the axial direction. Further, the annular ring member 48 is fixed to the outer side in the axial direction of the hub portion 43c by another fastening member (not shown). Referring to Fig. 3, a pair of spring locking pins 45 and spring locking pins 46 are fixed to the outer circumferential surface of the ring member 48 and the side surface of the second driven gear 44, respectively. In the spring groove 45a formed in the locking pin 45 and the locking pin 46, the spring A tension coil spring 47 is mounted on the spring groove 46a. Thereby, when the drive gear 41 and the driven gear 42 are engaged, the first driven gear 43 and the second driven gear 44 are biased toward each other in different rotational directions.

In order to form the meshing head portion 2 having an appropriate shape in the fastener element forming wire 1 by the press forming apparatus 10 configured as described above, the flat cross-sectional portions of the pair of first press forming rolls 31 and the second press forming rolls 32 are required to be formed. The gap C between the portion 51 and the flat cross-sectional portion forming portion 52 is a predetermined gap, and the flat cross-sectional portion forming portion 51 and the flat cross-sectional portion forming portion 52 are opposed to each other. These conditions are achieved by the inter-core adjustment and the circumferential direction adjustment of the pair of first press forming rolls 31 and the second press forming rolls 32.

Hereinafter, the adjustment of the press forming apparatus 10 for the wire for fastener element molding will be described in detail. First, the inter-core adjustment of the first press forming roll 31 and the second press forming roll 32 is performed. Specifically, as shown in FIG. 5( b ), the fixing screw (not shown) of the eccentric ring 36 is loosened, and the fixing of the eccentric ring 36 with respect to the driven shaft 12 is released, and the tool is inserted into the working hole. Then, as shown in FIG. 6( a ), the eccentric ring 36 is rotated, and the rotation center d2 of the second press forming roll 32 is moved relative to the first press forming roll 31 to change the first press forming roll 31 and the second. The distance L between the press forming rolls 32 is finely adjusted to the gap C between the flat cross-sectional portion forming portion 51 and the flat cross-sectional portion forming portion 52, and then the eccentric ring 36 is fixed to the driven shaft 12 by a fixing screw. The gap C between the flat cross-sectional portion forming portion 51 and the flat cross-sectional portion forming portion 52 determines the amount of recess of the fastener element forming wire 1, that is, the shape of the engaging head portion 2, and is therefore an important factor that directly affects the meshing performance. .

The driven gear 42 is externally fitted to the second press forming roll 32 with the eccentric ring 36 The movement of the second press forming roll 32 is caused to approach or separate from the drive gear 41. Therefore, as shown in FIGS. 8(a) and 8(b), the distance between the cores of the drive gear 41 and the driven gear 42 changes, and the backlash of the gear also changes. In other words, when the gap C between the flat cross-sectional portion forming portion 51 and the flat cross-sectional portion forming portion 52 is increased, the distance between the cores of the drive gear 41 and the driven gear 42 is increased, and the backlash is increased (Fig. 8(b) status). Further, when the gap C between the flat cross-sectional portion forming portion 51 and the flat cross-sectional portion forming portion 52 is reduced, the distance between the cores of the drive gear 41 and the driven gear 42 is reduced, and the backlash is reduced (Fig. 8(a) status).

However, since the first driven gear 43 and the second driven gear 44 are biased in the opposite directions in the circumferential direction by the elastic member 47, as shown in FIG. 8(b), if the backlash is increased, the first The driven gear 43 and the second driven gear 44 are rotated in a direction away from each other by the elastic force of the elastic member 47, thereby reducing the backlash. Then, as shown in FIG. 8(a), when the backlash is reduced, the first driven gear 43 and the second driven gear 44 are rotated in the direction in which they approach each other against the elastic force of the elastic member 47. Thereby, the adjustment is automatically performed in such a manner that the backlash is always the smallest (zero backlash). Therefore, the circumferential direction of the flat cross-sectional portion forming portion 51 and the flat cross-sectional portion forming portion 52 caused by the backlash of the drive gear 41 and the driven gear 42 can be prevented.

When the eccentric ring 36 is rotated to change the distance L between the first press forming roll 31 and the second press forming roll 32, the second press forming roll 32 is slightly rotated by the eccentric direction component of the eccentric ring 36. Therefore, the phase is shifted from the circumferential direction of the first press forming roll 31. The shift in the circumferential direction phase is corrected by the phase adjustment of the eccentric pin 35 in the circumferential direction described below.

The adjustment of the circumferential direction of the first press forming roll 31 and the second press forming roll 32 in which the flat cross-sectional portion forming portion 51 and the flat cross-sectional portion forming portion 52 face each other is as shown in Fig. 2, first, the first press is released. The fastening member that is fastened by the forming roller 31 and the driving gear 41 allows the first press forming roller 31 to rotate relative to the driving gear 41.

Next, when the first shaft 35a of the eccentric pin 35 fitted to the circular hole portion 34a of the drive gear 41 is rotated as shown in Fig. 5(a), the second shaft 35b is as shown in Fig. 6(a). The first press forming roll 31 fitted to the long hole portion 33 is rotated about the drive shaft 11 with respect to the drive gear 41, and the phase of the first press forming roll 31 and the second press forming roll 32 in the circumferential direction is adjusted. Then, the first press forming roll 31 and the drive gear 41 are fastened by the fastening members. Thereby, the flat cross-sectional portion forming portion 51 and the flat cross-sectional portion forming portion 52 of the first press forming roll 31 and the second press forming roll 32 face each other.

As shown in FIG. 9, between the first press forming roll 31 and the second press forming roll 32, which are subjected to inter-core adjustment and phase adjustment, and the second press forming roll 32, between the flat cross-sectional portion forming portion 51 and the flat cross-sectional portion forming portion 52 The wire 1 for zipper element forming is inserted and clamped, whereby the wire element 1 for fastener element forming is partially deformed into a flat state at predetermined intervals, and the meshing head 2 of the element is formed. In addition, it is preferable that the wire member 1 for fastener element molding is provided with the guide member 60 and the guide member 61 in the front and back of the 1st press molding roll 31 and the 2nd press molding roll 32, and it guides.

As described above, the press forming apparatus 10 for the fastener element forming wire according to the present embodiment includes the drive gear 41 and the driven gear that mesh with each other. 42; and the first press forming roll 31 and the second press forming roll 32 that rotate integrally with each of the drive gear 41 and the driven gear 42 and have a circular hole portion 34a formed in the drive gear 41, and the first press forming roll 31, the long hole portion 33 is formed, the first shaft 35a of the eccentric pin 35 is inserted into the circular hole portion 34a, and the second shaft 35b is inserted into the long hole portion 33, thereby rotating the eccentric pin 35 in the circular hole portion 34a. The phase adjustment of the first press forming roll 31 and the second press forming roll 32 in the circumferential direction is performed, and the flat cross-sectional portion forming portion 51 and the flat cross-sectional portion forming portion 52 of the first press forming roll 31 and the second press forming roll 32 are possible. Fine-tune and align the phases of each other. Thereby, the meshing head 2 of the correct shape with excellent meshing performance can be formed in the fastener element wire 1 for fastener elements.

Further, an eccentric ring 36 whose thickness changes in the circumferential direction is disposed between the driven shaft 12 and the second press forming roll 32, and the rotation center d2 of the second press forming roll 32 is rotated by rotating the eccentric ring 36. By moving, the distance L between the first press forming roll 31 and the second press forming roll 32 is adjusted, so that the flat cross-sectional portion forming portion 51 and the flat cross-section portion of the first press forming roll 31 and the second press forming roll 32 are formed. The gap C between the molding portions 52 is finely adjusted, and the amount of depression of the fastener element forming wire 1 can be appropriately set. Thereby, the meshing head 2 of the correct shape with excellent meshing performance can be formed in the fastener element wire 1 for fastener elements.

Further, the driven gear 42 has a first driven gear 43 and a second driven gear 44 which are divided in the axial direction and are relatively rotatable, and are fitted to the driven shaft 12 via the eccentric ring 36. Since the first driven gear 43 and the second driven gear 44 are biased in the opposite directions in the circumferential direction by the elastic member 47, the eccentric ring 36 is automatically rotated to perform the first press forming roll 31 and the second Stamping forming roll 32 (drive The variation of the backlash caused by the adjustment of the distance L between the gear 41 and the driven gear 42) allows the drive gear 41 and the driven gear 42 to always mesh with the zero backlash. Thereby, it is possible to prevent the first press forming roll 31 and the second press forming roll 32 from moving relative to each other in the rotational direction (phase shift), and to form the meshing head 2 having an appropriate shape in the fastener element forming wire 1 .

Further, since the drive shaft 11 and the driven shaft 12 are fixed to the support shaft 13 and the support shaft 16 with a constant distance between the cores, the press forming apparatus 10 for the fastener element forming wire can be downsized and unitized. Thereby, only the press forming apparatus 10 can be removed from the fastener element manufacturing apparatus, and maintenance can be performed easily.

In addition, the present invention is not limited to the above-described embodiments, and can be appropriately modified without departing from the spirit and scope of the invention.

10‧‧‧Compression forming device for wire for zipper element forming

11‧‧‧Drive shaft

11a, 12a‧‧‧ end

11b, 12b‧‧‧ the other end

12‧‧‧ driven shaft

22‧‧‧ push ring

31‧‧‧First stamping forming roll (press forming roll)

32‧‧‧Second press forming roll (press forming roll)

35‧‧‧eccentric pin

35d‧‧‧ slot

41‧‧‧ drive gear

42‧‧‧ driven gear

43‧‧‧1st driven gear

44‧‧‧2nd driven gear

45, 46‧‧‧ card sales

45a, 46a‧‧ ‧ spring slot

47‧‧‧Stretched coil spring

48‧‧‧ ring members

51, 52‧‧‧ flat section forming part

Claims (4)

A press forming device (10) for a wire for forming a fastener element, comprising: a drive gear (41) and a driven gear (42) meshing with each other; and a pair of press forming rolls (31, 32) capable of being driven The gear (41) and the driven gear (42) are integrally rotated and disposed coaxially with the drive gear (41) and the driven gear (42), respectively, by the drive gear and the driven The rotation of the gear is formed on the fastener element forming wire (1) of the pair of press forming rolls continuously, and at least the engaging head (2) of the fastener element is formed at a predetermined interval, wherein A circular hole portion (34a) is formed in one of the drive gear and the driven gear, and one of the press forming rolls that rotate integrally with the one of the driven gears, and the gear and the seat of the one In any of the press forming rolls, an elongated hole portion (33) is formed, and an eccentric pin (35) having a first shaft (35a) inserted into the circular hole portion is provided And a second shaft (35b) inserted into the long hole portion and eccentrically coupled to the first shaft, and rotating the eccentric pin in the circular hole portion The relative position of the gear and the press forming roll is finely adjusted, thereby performing phase adjustment of the pair of press forming rolls in the circumferential direction. A press forming device (10) for a wire for forming a fastener element according to claim 1, wherein a drive shaft (11) for supporting the drive gear (41) and the punch Between the press forming rolls (31) and between the driven shaft (12) supporting the driven gear (42) and the press forming roll (32), a thickness span is disposed An eccentric ring (36) that varies in a circumferential direction, the eccentric ring is rotated relative to the drive shaft or the driven shaft, and the center of rotation (d2) of the press forming roll is relative to the drive shaft or The shaft core (d1) of the driven shaft is moved, thereby adjusting the distance (L) between the pair of press forming rolls. The press forming device (10) for a fastener element for forming a fastener element according to claim 2, wherein the driven gear (42) has a first driven gear and a second driven gear (43, 44). The first driven gear and the second driven gear (43, 44) are divided in the axial direction and are relatively rotatable, and are fitted to the driven shaft via the eccentric ring (36) ( 12) The press forming device (10) for the wire for forming a fastener element includes an elastic member (47) that surrounds the first driven gear and the second driven gear in a circumference Apply force to each other in the opposite direction. The press forming device (10) for a wire for forming a fastener element according to the second or third aspect of the invention, wherein the drive shaft (11) and the driven shaft (12) are at least one end fixed to The fixed distance between the cores of the support plates (13, 16) is fixed.