TWI785293B - Bottom stop forming device and bottom stop forming method of slide fastener - Google Patents

Abstract

A bottom stop forming device and a bottom stop forming method of a zipper capable of utilizing ultrasonic The wave welding efficiently forms the bottom stop, and the appearance performance of the back side of the slide fastener is good. The bottom stop forming device of the slide fastener is provided with: the welding head 33, which transmits the ultrasonic vibration from the vibrator 32, has a contact surface 35a in contact with the welded part 6a of the spiral element 3; the moving mechanism 40 supports the welding head 33 and the vibrator 32, and The horn 33 and the vibrator 32 can be moved so that the contact surface 35a of the horn 33 is pressed against the welded portion 6a of the spiral element 3; and the chain support stand 20 is arranged so that the welded portion 6a of the spiral element 3 The continuous chain 1 is supported below the welding head 33 . The horn 33 vibrates ultrasonically in a direction including the longitudinal component of the continuous chain 1 .

Description

Bottom stop forming device and bottom stop forming method of slide fastener

The invention relates to a bottom stop forming device and a bottom stop forming method of a zipper.

In Patent Document 1, as a method of forming a bottom stop having excellent fixing strength and high processing efficiency, a method of forming a bottom stop of a slide fastener is described in which a plurality of elements are pressed against each other at the end portions of the element row. In the state where the frictional resistance of the contact surface of the elements is increased, a plurality of elements are melted and fixed by ultrasonic waves.

[Prior art literature]

[Patent Document]

Patent Document 1: Japanese Patent Laid-Open No. Sho 56-028523

In addition, in the conventional method of bottom stop formation based on ultrasonic waves, the welding of the spiral elements is usually carried out by using a welding head vibrating in the vertical direction, but sometimes on the back side of the slide fastener (relative to the space between the fastener tape and the spiral elements) The edge portions of the opposite pair of fastener tapes are opened to each other, forming a gap between the edge portions of the fastener tapes, resulting in impaired appearance performance. In particular, in recent years, the use of spiral elements as the so-called back side of the inner surface side of the zipper adhesion product is also increasing. Bottom stop is formed in a state where the edges of the rims are in close contact with each other.

The bottom stop forming method of the slide fastener described in the above-mentioned Patent Document 1 is silent on the vibration direction of the ultrasonic waves.

In addition, as a method of forming a bottom stop excellent in such an appearance performance, a method of melting and fixing the spiral element using a heater to form a bottom stop is conceivable, but it takes a lot of time until welding, and there is a problem in work efficiency.

The present invention has been made in view of the foregoing circumstances, and an object of the present invention is to provide a bottom stop forming device and method for forming a slide fastener capable of efficiently forming a bottom stop by ultrasonic welding and having a good appearance on the back side of the slide fastener.

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

(1) A bottom stop forming device for a zipper, which is a bottom stop forming device that uses ultrasonic welding to form a bottom stop on helical chain teeth of a spiral chain, wherein the bottom stop forming device includes: a vibrator that outputs ultrasonic vibrations; a welding head , which transmits the vibration from the vibrator, has a contact surface in contact with the welded part of the spiral element; a moving mechanism, which supports the horn and the vibrator, and can move the horn and the vibrator so that the contact surface of the horn Pressing against the welded portion of the spiral element; and a chain support stand that supports the spiral chain in such a manner that the welded portion of the spiral element is disposed below the welding head, and the welding head proceeds in a direction including a longitudinal component of the spiral chain Ultrasonic vibration.

(2) A bottom stop forming method of a slide fastener, which uses the bottom stop forming device of the slide fastener described in (1), and uses ultrasonic welding to form a bottom stop of a spiral chain element. Wherein, the bottom stop forming method includes: the first step, in the first step, the spiral chain is placed on the chain supporting platform in such a way that the welded part of the spiral element is located below the welding head ; the second step, in the second step, after the welding head is pressed on the spiral chain element, the welding head is ultrasonically vibrated along the direction including the length direction component of the spiral chain to weld the spiral chain element; and the third step, In this third step, the horn is retracted from the spiral chain.

According to the bottom stop forming device and method for forming a slide fastener of the present invention, the bottom stop can be efficiently formed by ultrasonic welding, and good appearance can be imparted to the back side of the slide fastener.

1: Continuous chain (spiral chain)

1a: The lower surface (back) of the continuous chain (spiral chain)

2: Continuous zipper tape

2a: with side edge

3: Spiral chain teeth

4: core wire

5: suture

6: Bottom stop

6a: welded part (contact part)

10, 10A: Bottom stop forming device for zipper

11: base

11a: Through hole

12: Mechanism desk

13: Guide roller

14: Drive roller

15: driven roller

20: Chain support platform

21: Lower surface support part

22: Upper surface support part

23: Undertaking platform

24: anvil

24a: upper surface

25: Opening

25a: side wall

26: Inclined surface

27: Through hole

28: Roller support body

29: Sensing Roller

30: Ultrasonic welding machine

32: vibrator

33, 33A, 33B, 33C: welding head

34a: Root

34b: the top part

35: protrusion

35a: contact surface

35b: Gap

40: Mobile Mechanism

41: Linear guide rail

42: Movable table

43: Cylinder

44: piston rod

46: Supporting part

46a: Grooving

46b: lower surface

47: stopper

C: Clearance

WP: Bottom stop formation position

CL: central axis

θ: angle

Fig. 1 is a side view of a bottom stop forming device of a slide fastener according to a first embodiment of the present invention.

Fig. 2 is an enlarged perspective view of main parts of the bottom stop forming device of the slide fastener shown in Fig. 1 .

It is a plan view which looked at the slide fastener in which the bottom stop was formed from the surface side.

Fig. 4 is a sectional view taken along line IV-IV of Fig. 3 .

Fig. 5 is an enlarged perspective view of the tip end of the horn shown in Fig. 2 .

Fig. 6 is a VI-VI sectional view of Fig. 2 .

(a) of Fig. 7 is the back view of the slide fastener formed by the conventional ultrasonic bottom stop forming device, and (b) of Fig. 7 is the back view of the slide fastener formed by the bottom stop forming device of the slide fastener of the present invention. view.

It is a side view of the bottom stop formation apparatus of the slide fastener concerning 2nd Embodiment of this invention.

9( a ) is an enlarged perspective view of the tip end of the horn shown in FIG. 8 , FIG. 9( b ) is a side view, and FIG. 9( c ) is a front view.

10( a ) is an enlarged perspective view of a first modified example of the horn tip used in the second embodiment, FIG. 10( b ) is a side view, and FIG. 10( c ) is a front view.

11( a ) is an enlarged perspective view of a second modified example of the horn tip used in the second embodiment, FIG. 11( b ) is a side view, and FIG. 11( c ) is a front view.

Hereinafter, each embodiment of the bottom stop forming apparatus of the slide fastener suitably applied to the bottom stop forming method of the slide fastener of this invention is demonstrated in detail based on drawing.

In addition, in the following description, regarding the bottom stop forming device, the upper side in FIGS. 1 and 8 is referred to as the upper side, and the lower side is referred to as the lower side with respect to the vertical direction. In addition, regarding the left and right directions, when viewed from the upstream side of the conveying direction of the spiral chain, the right side (the front side of the paper in Fig. 1 and Fig. 8, the right side of Fig. The depth side of the paper surface, the left side of Figure 6) is set to the left, and for the front and rear directions, the upstream side of the conveying direction of the spiral chain (the left side of Figure 1 and Figure 8) is defined as the front side, and the downstream side of the conveying direction (Figure 1 and The right side of Fig. 8) is set as the rear side. Moreover, about a slide fastener, let the front side be the side to which the spiral element was attached with respect to the fastener tape, and let the back side be the side which does not have the spiral element.

(first embodiment)

As shown in Fig. 1 and Fig. 2, the bottom stop forming device 10 of the slide fastener of the present embodiment includes: a chain supporting platform 20, which is fixed on the base 11 to support the continuous chain 1; an ultrasonic welding machine 30; and a moving mechanism 40, It is arranged on the mechanism table 12 fixed on the base 11 to move the ultrasonic welding machine 30 in the vertical direction. The bottom stop forming device 10 forms the bottom stop 6 by welding the spiral elements 3 of the continuous chain 1 supported by the chain support stand 20 using ultrasonic waves.

Referring to FIG. 3 , FIG. 4 and FIG. 6 , the continuous chain 1 includes: a pair of continuous zipper tapes 2 ; The spiral element 3 is, for example, an element formed by winding polyamide or polyester monofilament in a helical shape, and a core thread 4 is inserted inside, and is fixed to the continuous slide fastener by sewing thread 5 along the side edge portion 2a of the tape. Surface with 2. The bottom stop 6 is formed by welding the welded portion 6 a of a pair of spiral elements 3 meshing with each other by an ultrasonic welding machine 30 .

Returning to Fig. 1 and Fig. 2, in the bottom stop forming device 10, a pair of guide rollers 13 are sequentially provided on the downstream side of the chain support platform 20, which make the bottom stop 6 formed thereon and output from the chain support platform 20 in the horizontal direction. The continuous chain 1 is passed through the through hole 11 a provided in the base 11 to guide the continuous chain 1 in the vertical direction; and the driving roller 14 and the driven roller 15 sandwich and convey the continuous chain 1 .

The chain support stand 20 includes a lower surface support portion 21 and an upper surface support portion 22 fixed to the lower surface support portion 21 . The lower surface support portion 21 is fixed to the base 11 via a receiving stand 23 . Referring to FIG. 6 , an anvil 24 for supporting the lower surface (back surface) 1 a of the continuous chain 1 is formed on the upper surface of the lower surface support portion 21 . The upper surface 24a of the anvil 24 is a horizontal plane, and an inclined portion (taper) for guiding the continuous fastener tape 2 is formed at the left and right corners, and between the inclined surface 26 of the upper surface supporting portion 22 described later, A predetermined gap C is formed. The anvil 24 cooperates with the horn 33 to clamp the continuous chain 1 .

In addition, in the present embodiment, the anvil 24 and the lower surface support portion 21 have been described as integrally formed, but the anvil 24 and the lower surface support portion 21 may be formed of different members and fixed with bolts or the like.

The upper surface support part 22 has the opening part 25 which exposes the spiral element 3 upward at least in the bottom stop formation position WP. Moreover, the lower surface of the upper surface support part 22 becomes the inclined surface 26 which inclines gradually downward toward the left-right direction. Further, in the upper surface support portion 22 , a through hole 27 is formed at a position upstream of the opening portion 25 in the conveyance direction of the continuous chain 1 . A sensing roller 29 rotatably supported by the roller support body 28 is inserted into the through hole 27 .

The sensing roller 29 comes into contact with the continuous chain 1 , and as the continuous chain 1 is conveyed, the sensing roller 29 enters a not-shown gap to sense the gap. When the sensing roller 29 senses the gap, the drive roller 14 drives the continuous chain 1 to convey it for a predetermined distance and then stops to stop the welded portion 6 a of the continuous chain 1 at the bottom stop forming position WP.

The ultrasonic welding machine 30 has: an external unshown oscillator, a vibrator 32 and a welding head 33, which converts electrical energy into mechanical energy to make the welding head 33 perform ultrasonic vibration, and at the same time, utilize the welding head 33 to apply pressure to the spiral element 3. Pressure, so that the spiral element 3 generates frictional heat, and the welded portion 6a is welded. The oscillator converts a low frequency (eg 50/60Hz) electrical signal into a high frequency (eg 20kHz) electrical signal. The high-frequency electrical signal amplified by the oscillator is transmitted to a vibrator 32 such as a piezoelectric element to be converted into mechanical vibration energy, and the vibrator 32 outputs ultrasonic vibration. This ultrasonic vibration is further transmitted to the spiral element 3 via the horn 33, and the spiral element 3 is welded by frictional heat. The ultrasonic welder 30 vibrates ultrasonically in a direction along the central axis CL of the vibrator 32 and the horn 33 .

The ultrasonic welder 30 is supported by the moving mechanism 40 parallel to the longitudinal direction of the continuous chain 1 horizontally supported by the chain support stand 20 (horizontally in this embodiment). That is, the horn 33 vibrates ultrasonically in a direction including at least the longitudinal component of the continuous chain 1 conveyed between the upper surface support portion 22 and the lower surface support portion 21 from the front side to the rear side. In the embodiment, ultrasonic vibration is performed in the horizontal direction.

The horn 33 is made of, for example, an aluminum alloy or a titanium alloy, and its cross-sectional shape changes smoothly from a root portion 34 a having a substantially circular cross section to a tip portion 34 b having a substantially rectangular cross section. As shown in FIG. 5 , substantially rectangular parallelepiped protrusions 35 are integrally formed on the upper and lower portions of the tip end portion 34 b so as to protrude in the radial direction, respectively. The upper and lower surfaces of the protruding portion 35 are planes formed parallel to the central axis CL of the vibrator 32 and the horn 33, and constitute a contact surface 35a that contacts the spiral element 3 when forming a bottom stop.

The surface of the contact surface 35a is formed in a concavo-convex shape by knurling or the like, for example. Thereby, the frictional force of the contact surface 35a and the spiral element 3 improves, and the welding of the spiral element 3 becomes easy. In addition, L-shaped cutouts 35 b with substantially quarter-circular corners are formed at both end portions in the front-rear direction of the protruding portion 35 . The function of the notch 35b will be described in detail later.

In addition, by providing a plurality of protrusions 35 on the horn 33 , for example, when one protrusion 35 is damaged, the life of the expensive horn 33 can be extended by using another protrusion 35 . In addition, by making the shapes of the respective protruding portions 35 different, it is possible to use one horn 33 to cope with a plurality of bottom stops 6 having different specifications.

The moving mechanism 40 supports the ultrasonic welding machine 30 so as to be movable up and down. Specifically, the moving mechanism 40 includes: a linear guide rail 41 vertically fixed to the mechanism table 12, and the movable table 42 is arranged to be guided by the linear guide rail 41 to move from the vertical direction to the vertical direction. Such as. The movable table 42 is connected to a piston rod 44 of an air cylinder 43 fixed to the upper portion of the mechanism table 12 . Accordingly, the movable table 42 guided by the linear guide rail 41 moves in the vertical direction by the operation of the air cylinder 43 .

A support portion 46 that horizontally supports the ultrasonic welder 30 is fixed to the movable table 42 . The support portion 46 has a circular hole (not shown) fitted with the vibrator 32 and a notch 46 a communicating with the circular hole. The vibrator 32 is fitted in the circular hole, and the interval between the notches 46 a is narrowed by bolts (not shown), and the vibrator 32 is fixed to the support portion 46 .

Thereby, the ultrasonic welder 30 can be fixed at an arbitrary position and phase with respect to the support part 46 . That is, the protrusion 35 of the horn 33 is positioned above the opening 25 as the bottom stop forming position WP, and the contact surface 35 a is fixed so that it is parallel to the continuous chain 1 supported by the chain support stand 20 . In other words, vibrator 32 and horn 33 are supported by moving mechanism 40 so as to be horizontally aligned along the longitudinal direction of continuous chain 1 . In addition, a height-adjustable stopper 47 is provided on the mechanism table 12 , and the stopper 47 abuts against the lower surface 46 b of the support portion 46 to determine the position of the movable table 42 at the time of bottom stop.

The bottom stop formation by the bottom stop forming apparatus 10 having such a structure is formed by the following steps.

First, the continuous chain 1 is inserted between the lower surface support portion 21 and the upper surface support portion 22 of the chain support platform 20 with the pair of spiral elements 3 engaged with each other facing upward, and then penetrates through the through hole 11 a of the base 11 . , and then guided downward by a pair of guide rollers 13, sandwiched by a driving roller 14 and a driven roller 15 to be placed.

Thereby, as shown in FIG. 6, the lower surface (back surface) 1a of the continuous chain 1 is supported by the anvil 24, and the spiral element 3 is exposed upward from the opening part 25 of the upper surface support part 22. And, the continuous chain 1 is opened with the left and right sides of the spiral element 3 The state that the side wall 25a of the portion 25 is guided is placed.

In addition, the left and right sides of the pair of fastener tapes 2 of the continuous chain 1 placed on the chain support platform 20 are bent downward along the inclined surface 26 of the upper surface support part 22, so that the sewing thread 5 for sewing the spiral element 3 can be connected with the The projections 35 of the horn 33 are separated.

Next, the driving roller 14 is driven to convey the continuous chain 1 . Soon, when the sensing roller 29 perceives the space where the plurality of spiral elements 3 are continuously cut off from the continuous chain 1, the driving roller 14 is driven to further convey the continuous chain 1 for a predetermined distance, and then the driving roller 14 stop. Thereby, in the continuous chain 1, the welded part 6a which is the upstream side of a space|interval part is located in the bottom stop formation position WP.

Here, the moving mechanism 40 operates the air cylinder 43 to move the movable table 42 guided by the linear guide rail 41 downward together with the ultrasonic welding machine 30, and is clamped at the bottom stop forming position by the anvil 24 and the contact surface 35a of the welding head 33. The welded part 6a of the spiral element 3 of WP. The distance between the anvil 24 and the contact surface 35 a , that is, the amount of pressing the screw element 3 is pressed by the horn 33 can be changed by adjusting the height of the stopper 47 .

After the spiral element 3 is pressed by the horn 33 , the vibrator 32 is oscillated to ultrasonically vibrate the horn 33 in a direction including the longitudinal component of the continuous chain 1 , that is, in the horizontal direction in this embodiment. Thereby, the to-be-welded part 6a of the spiral element 3 which contacts the contact surface 35a of the horn 33 melts by frictional heat. Since the contact surface 35a is formed in an uneven shape by knurling or the like, frictional heat generated is large, and the spiral element 3 can be melted efficiently.

The heating portion of the spiral element 3 obtained by ultrasonic vibration is mainly limited to the contact portion (welded portion 6a) with the contact surface 35a of the welding head 33, so in the vibration Immediately after the oscillation of the child 32 stops, the welded part 6a of the spiral element 3 is cooled and welded in a short time. In addition, since the contact surface 35a of the horn 33 vibrates in the longitudinal direction (horizontal direction) of the spiral element 3, the influence on the fastener tape 2 is small, and the pair of tape side edge portions 2a do not open from each other, but are Sealed state welding.

At this time, a part of the molten resin of the spiral element 3 melted by the frictional heat between the contact surface 35a sometimes overflows to the front and rear from both ends of the contact surface 35a in the front-rear direction and solidifies. The surface protrudes and becomes a burr. This burr is a factor that deteriorates the texture. However, in the horn 33 of this embodiment, the notches 35b are formed at both ends in the front-rear direction of the protruding portion 35, so a part of the molten resin overflowing from the both ends in the front-rear direction of the contact surface 35a, that is, the burrs are crushed by the notches 35b. The plastic surgery has improved the feel of the lower stop 6.

When the bottom stop 6 is formed on the continuous chain 1 , the air cylinder 43 is operated, and the ultrasonic welding machine 30 moves upward together with the movable table 42 to retreat from the continuous chain 1 . Then, the driving roller 14 starts to drive again to convey the continuous chain 1 until the next welded portion 6a is located at the bottom stop forming position WP (until the sensing roller 29 senses the next gap, and then conveys a predetermined distance). Thereafter, the same operation is repeated to continuously form the bottom stop 6 .

The back surface shape of the helical chain in which the bottom stop was formed by the conventional bottom stop forming apparatus and the bottom stop forming apparatus of this embodiment is shown in FIG. 7 by comparison. As shown in Fig. 7 (a), the back side of the spiral chain 1 formed by the conventional bottom stop forming device has the following situation: the tape side edge portions 2a of a pair of fastener tapes 2 are opened from each other, and the bottom stop 6 is opened. Partial exposure from the gap of the belt side edge portion 2a impairs the appearance performance. On the other hand, as shown in FIG. 7 (b), on the back of the continuous chain 1 on which the bottom stop 6 is formed by the bottom stop forming device 10 of this embodiment, the tape side edge portions of a pair of fastener tapes 2 2a are welded in a state of close contact with each other, so the bottom stop 6 cannot be seen, and the continuous chain 1 excellent in appearance performance can be obtained.

(second embodiment)

10 A of bottom stop forming apparatuses of 2nd Embodiment are arrange|positioned so that the ultrasonic welding machine 30 may incline with respect to the continuous chain 1 installed horizontally on the chain support stand 20 by angle θ. That is, the contact surface 35a of the horn 33A acts ultrasonic vibration on the spiral element 3 from the direction inclined by the angle θ with respect to the continuous chain 1 . Therefore, in the present embodiment, the horn 33A vibrates ultrasonically in an oblique direction that includes the length of the continuous chain 1 conveyed from the front side to the rear side between the upper surface support portion 22 and the lower surface support portion 21. A composite component of a direction component and an up-down direction component perpendicular to the length direction component. In addition, the continuous chain 1 delivered from the chain support stand 20 after forming the bottom stop is conveyed in the horizontal direction.

Other structures and functions are the same as those of the bottom stop forming device 10 of the first embodiment. Therefore, different parts will be mainly described below, and the same parts and corresponding parts will be given the same reference numerals, and detailed description will be simplified or omitted.

As shown in FIG. 8 , the support portion 46 supporting the ultrasonic welder 30 is fixed to the ultrasonic welding machine 30 so that the horn 33A is located below the vibrator 32 and is inclined at an angle θ in the counterclockwise direction in the figure relative to the vertical direction. Movable table 42. Thus, the central axis CL of the ultrasonic welder 30 is inclined by the angle θ from the horizontal.

Referring to FIG. 9 , the horn 33A of this embodiment has one protrusion 35 at the tip 34 b, and the contact surface 35 a of the protrusion 35 is formed to be inclined at an angle θ with respect to the central axis CL of the ultrasonic welder 30 . Therefore, when the ultrasonic welding machine 30 is installed on the bottom stop forming device 10A with an angle of inclination θ, the contact surface 35a faces the horizontal direction, and the entire surface of the contact surface 35a is placed horizontally on the chain support. The continuous chain 1 of stages 20 is in contact.

Since the ultrasonic welding machine 30 performs ultrasonic vibrations along the direction of the central axis CL, the ultrasonic vibrations act on the spiral element 3 in the horizontal direction and the vertical direction.

Thus, when forming the bottom stop 6, the ultrasonic vibration in the horizontal direction is applied to the spiral element 3 to improve the appearance performance, and the ultrasonic vibration in the vertical direction is applied to improve the welding strength of the bottom stop 6. Bottom stop 6 that balances appearance performance and welding strength.

In addition, the contact surface 35a of the continuous chain 1 output from the chain support platform 20 after the bottom stop is formed is in contact with the welded portion 6a of the continuous chain 1. The position below the welding head 33A and the vibrator 32 is from the position of the chain support platform 20. Convey directly in the horizontal direction. Therefore, compared with 1st Embodiment, the conveyance mechanism which conveys the continuous chain 1 can be comprised simply.

(1st modified example)

As shown in FIG. 10 , in the horn 33B of the first modified example, two protruding portions 35 are provided at the tip portion 34 b with a phase difference of 180°. The contact surfaces 35 a of the protrusions 35 are formed to be inclined at an angle θ with respect to the central axis CL of the ultrasonic welder 30 . Thus, if the two protruding portions 35 are formed in the same shape, the life of the horn 33B can be extended by using one protruding portion 35 as a backup in case of emergency. In addition, if the two protruding portions 35 are formed in different shapes, one horn 33B can correspond to bottom stops 6 having different specifications.

(Second modified example)

As shown in FIG. 11 , in the horn 33C of the second modified example, four protruding portions 35 are provided at intervals of 90° in the circumferential direction on the distal end portion 34 b. The contact surfaces 35 a of the protrusions 35 are formed to be inclined at an angle θ with respect to the central axis CL of the ultrasonic welder 30 . root According to the horn 33C of the second modification including the four protrusions 35 , the life of the horn 33C can be further extended, and the bottom stop 6 of a plurality of specifications can be more flexibly handled.

In addition, in the horns 33B and 33C, the attachment intervals in the circumferential direction of the protrusions 35 are not limited to equal intervals.

In addition, all the notches 35b of the first embodiment can be applied to the horns 33A to 33C of the second embodiment.

The present invention is not limited to the contents illustrated in the above-mentioned embodiments, and can be appropriately changed within a range not departing from the gist of the present invention. For example, the notch 35b formed in the protruding portion 35 is not limited to the bottom stop forming means for the horizontal vibration of the horn 33, and is also effective for the bottom stop forming means for vibrating the horn in the vertical direction.

As described above, the following matters are disclosed in this specification.

(1) A bottom stop forming device for a zipper, which is a bottom stop forming device that uses ultrasonic welding to form a bottom stop on helical chain teeth of a spiral chain, wherein the bottom stop forming device includes: a vibrator that outputs ultrasonic vibrations; a welding head , which transmits the vibration from the vibrator, has a contact surface in contact with the welded portion of the spiral element; a moving mechanism, which supports the horn and the vibrator, and can make the horn and the vibrator The vibrator moves so as to press the contact surface of the horn against the welded portion of the spiral element; and the chain support table arranges the welded portion of the spiral element below the horn. The helical chain is supported in a manner, and the welding head performs ultrasonic vibration in a direction including a longitudinal component of the helical chain.

According to this structure, the bottom stop can be formed efficiently by ultrasonic welding, and the favorable appearance performance of the back side of a slide fastener can be provided.

(2) The bottom stop forming device for a slide fastener according to (1), wherein the horn has a protruding portion at a front end, and a contact surface of the protruding portion that contacts the spiral element is formed in a concavo-convex shape.

According to this structure, frictional heat can be efficiently generated in a spiral element, and a spiral element can be fused in a short time.

(3) The bottom stop forming device of a slide fastener according to (1) or (2), wherein the welding head has a notch on at least one side in the longitudinal direction of the spiral chain with respect to the contact surface.

According to this structure, the burrs formed by overflowing of the molten resin from the front-back direction end of the contact surface are crushed and shaped by the notch, and the feel of the bottom end can be improved.

(4) The device for forming a bottom stop of a slide fastener according to any one of (1) to (3), wherein the welding head is provided with a plurality of protruding parts formed along the circumferential direction and each having a The contact surface that the helical element contacts.

According to this configuration, it is possible to easily exchange the protruding portion for welding, and it is possible to adapt to a plurality of bottom stop sizes and specifications. In addition, when there are protruding parts having the same shape, even if one protruding part is damaged, it is possible to immediately switch to another protruding part, and the life of an expensive horn can be extended.

(5) The bottom stop forming device of a slide fastener according to any one of (1) to (4), wherein the welding head and the vibrator are arranged horizontally along the length direction of the spiral chain Supported by the moving mechanism, the horn performs ultrasonic vibration along the longitudinal direction of the spiral element.

According to this configuration, the helical element can be fused by bringing the helical chain into contact with the horn that vibrates ultrasonically in parallel, and can form a bottom stop excellent in appearance performance.

(6) The slide fastener bottom stop forming device according to (5), wherein a guide roller for vertically conveying the spiral chain conveyed in the horizontal direction is provided on the downstream side of the chain support stand.

According to this structure, the spiral chain formed with the bottom stop can be guided downward from the chain support stand, and the spiral chain can be conveyed without interfering with other members.

(7) The bottom stop forming device of a slide fastener according to any one of (1) to (4), wherein the horn and the vibrator are inclined so that the horn is positioned below the vibrator. Supported by the moving mechanism, the horn vibrates ultrasonically in the inclined direction toward the welded portion of the spiral element.

According to this configuration, the helical chain is welded from an oblique direction by using the ultrasonically vibrating horn, and a bottom stop having excellent appearance and high welding strength can be formed.

(8) The bottom stop forming device for a slide fastener according to (7), wherein the helical chain delivered from the chain support table is in a state where the contact surface is in contact with the welded portion of the helical chain. The lower part of the welding head and the vibrator is conveyed along the horizontal direction.

According to this structure, the spiral chain formed with the bottom stop can be conveyed in the horizontal direction from the chain support stand without interfering with other members by the structure of a relatively simple conveyance mechanism.

(9) The bottom stop forming device of a slide fastener according to any one of (1) to (8), wherein the chain support platform includes: a lower surface supporting portion having an anvil supporting the lower surface of the spiral chain in cooperation with the horn to hold the spiral chain; and an upper surface supporting portion having an The opening portion exposed upward is fixed to the lower surface support portion with a predetermined gap therebetween, and the lower surface of the upper surface support portion has a shape that gradually moves outward in the width direction. The sloped slope below.

According to this structure, the sewing line which sews the spiral element can be separated from the protruding part of the horn, and bottom stop can be formed more reliably.

(10) A method for forming a bottom stop of a slide fastener, which uses the device for forming a bottom stop of a slide fastener according to any one of (1) to (9), and utilizes ultrasonic welding to form a bottom stop on the spiral elements of a spiral chain, wherein, The bottom stop forming method includes: a first step of placing the spiral chain on the chain support platform in such a manner that the welded portion of the spiral element is located below the horn. ; the second step, in the second step, after the welding head is pressed against the spiral element, the welding head is ultrasonically vibrated in a direction including the longitudinal direction component of the spiral chain to weld the the spiral element; and a third step of retreating the horn from the spiral chain in the third step.

According to this structure, the bottom stop can be formed efficiently by ultrasonic welding, and the favorable appearance performance of the back side of a slide fastener can be provided.

(11) The bottom stop forming method of a slide fastener according to (10), wherein the horn and the vibrator are supported by the moving mechanism so as to be horizontally aligned along the longitudinal direction of the spiral chain, The welding head performs ultrasonic vibration along the length direction of the spiral element.

According to this structure, the helical element can be welded by bringing the helical chain into contact with the horn that vibrates in parallel in parallel, and can form a bottom stop with good appearance performance.

(12) The bottom stop forming method of a slide fastener according to (10), wherein the horn and the vibrator are obliquely supported by the moving mechanism so that the horn is positioned below the vibrator, and The horn vibrates ultrasonically along the inclined direction toward the welded portion of the spiral element.

According to this configuration, the helical chain is welded from an oblique direction by the ultrasonically vibrating horn, and a bottom stop having excellent appearance and high welding strength can be formed.

1: Continuous chain (spiral chain)

1a: The lower surface of the continuous chain (spiral chain)

10: Bottom stop forming device for zipper

11: base

12: Mechanism desk

13: Guide roller

14: Drive roller

15: driven roller

20: Chain support platform

21: Lower surface support part

22: Upper surface support part

23: Undertaking platform

28: Roller support body

30: Ultrasonic welding machine

32: vibrator

33: welding head

34a: Root

34b: the top part

35: protrusion

40: Mobile Mechanism

41: Linear guide rail

42: Movable table

43: Cylinder

44: piston rod

46: Supporting part

46a: Grooving

46b: lower surface

47: stopper

WP: Bottom stop formation position

CL: central axis

Claims (11)

A bottom stop forming device for a slide fastener, which is a bottom stop forming device (10) for forming a bottom stop (6) on a spiral chain element (3) of a spiral chain (1) by ultrasonic welding, wherein the bottom stop of the slide fastener is formed The device includes: a vibrator (32), which outputs ultrasonic vibration; a welding head (33), which transmits the vibration from the vibrator, and has a contact surface (35a) in contact with the welded part (6a) of the spiral element; a mechanism (40) supporting the horn and the vibrator, and capable of moving the horn and the vibrator so as to press the contact surface of the horn against the welded portion of the spiral element and a chain support stand (20) that supports the spiral chain in such a manner that the welded portion of the spiral element is disposed below the welding head along the length direction including the spiral chain Ultrasonic vibration is performed in the direction of the component, and the welding head (33) and the vibrator (32) are supported by the moving mechanism (40) in a manner horizontally arranged along the length direction of the helical chain (1), so The welding head performs ultrasonic vibration along the length direction of the spiral chain element (3). The bottom stop forming device of the zipper according to claim 1, wherein, on the downstream side of the chain support platform (20), there is a device for feeding the spiral chain (1) in the horizontal direction along the vertical direction. Conveying guide rollers (13). A bottom stop forming device for a slide fastener, which is a bottom stop forming device (10) for forming a bottom stop (6) on a spiral chain element (3) of a spiral chain (1) by ultrasonic welding, wherein the bottom stop of the slide fastener is formed The device includes: a vibrator (32), which outputs ultrasonic vibrations; a welding head (33), which transmits vibration from the vibrator, having a contact surface (35a) in contact with the welded portion (6a) of the spiral element; a moving mechanism (40), which supports the welding head and the The vibrator, and the welding head and the vibrator can be moved so as to press the contact surface of the welding head against the welded part of the spiral fastener element; and the chain support table (20), which makes the The spiral chain is supported in such a manner that the welded portion of the spiral element is disposed below the horn, and the horn vibrates ultrasonically in a direction including a longitudinal component of the spiral chain. The horn (33 ) and the vibrator (32), are obliquely supported on the moving mechanism (40) in such a way that the welding head is at a lower position than the vibrator, and the welding head faces the spiral element (3) The welded portion (6a) performs ultrasonic vibration along the inclined direction. The bottom stop forming device of a zipper according to any one of claims 1 to 3, wherein the welding head (33) is provided with a protruding part (35) at the top end (34b), and the protruding part (35) is A contact surface (35a) that contacts the spiral element (3) is formed in a concave-convex shape. The bottom stop forming device of zipper according to one of claims 1 to 3, wherein, the welding head (33) is in the length direction of the spiral chain (1) relative to the contact surface (35a) At least one side of has a notch (35b). The bottom stop forming device of a zipper according to any one of claims 1 to 3, wherein, The welding head (33) is provided with a plurality of protrusions (35), and the plurality of protrusions are formed along the circumferential direction of the welding head (33) and each have a contact surface with the spiral fastener element (3) (35a). The bottom stop forming device of the zipper according to claim 3, wherein, the spiral chain (1) outputted from the chain support platform (20) is connected between the contact surface (35a) and the spiral chain The welding head (33) and the vibrator (32) are conveyed in the horizontal direction under the state where the welded portion (6a) is in contact with each other. The bottom stop forming device of a zipper according to one of claims 1 to 3, wherein, the chain support platform (20) includes: a lower surface support portion (21), which has a ) cooperate to clamp the helical chain (1) and support the anvil (24) of the lower surface (1a) of the helical chain; and the upper surface support portion (22), which has the helical chain (3) The opening part (25) exposed upward is fixed to the lower surface support part with a predetermined gap (C) therebetween, and the lower surface of the upper surface support part has : an inclined surface (26) that gradually inclines downward toward the outside in the width direction. A method for forming a bottom stop of a zipper, which uses the device (10) for forming a bottom stop of a zipper described in any one of claims 1 to 8, and utilizes ultrasonic welding to form a bottom stop of a spiral chain (1) under the formation of a spiral element (3) stop (6), wherein, the method for forming the bottom stop of the zipper includes: the first step, in the first step, the welded part (6a) of the spiral fastener element is positioned at the welding head (33 ), the spiral chain is placed on the chain support platform (20); In the second step, after the horn (33) is pressed against the spiral element, the horn is ultrasonically vibrated in a direction including a longitudinal component of the spiral chain and welding the spiral element; and a third step of retreating the horn from the spiral chain in the third step. The bottom stop forming method of the zipper as claimed in item 9, wherein, the welding head (33) and the vibrator (32) are supported on the horizontally arranged length direction of the spiral chain (1) In the moving mechanism (40), the welding head performs ultrasonic vibration along the length direction of the spiral chain element (3). The bottom stop forming method of a zipper according to claim 9, wherein the welding head (33) and the vibrator (32) are supported obliquely in such a way that the welding head is at a lower position than the vibrator In the moving mechanism (40), the welding head faces the welded portion (6a) of the spiral element (3) and performs ultrasonic vibration along the inclined direction.

Images