JPH03136603A - Molding method for slide fastener upper stopper and device therefor - Google Patents

Abstract

PURPOSE:To ensure the proper molding and supply of an upper stopper with simple construction by applying the constitution wherein the lengthwise intermediate part a stopper material of necessary length cut out from a wire material is pressed, inserted and passed through a fixed gap with a push rod for being bent to a U-shape, and the bent part is first supplied. CONSTITUTION:A strip-shaped wire material 2 is fed from below and cut out to a length necessary for molding an upper stopper 1. With a cutout wire material 3 erected, a push rod 4 is kept in contact with the lengthwise center thereof and pushed toward a gap between upper and lower molds fixed with a gap in a vertical direction. The upper stopper material 3 is thereby bent to a U-shape and the bent part 3a of the material 3 is fed first. According to the aforesaid construction, when a molded upper stopper is fed into a pocket 24 with the bent part 3a first, and retained in therein, the open end of the upper stopper is aligned with the opening of the pocket 24. It follows, therefore, that the stopper can be properly bent to a U-shape with simple constitution and, in addition, properly bent to a U-shape with simple constitution and, in addition, properly fitted to the end of a fastener tape, thereby ensuring easy molding and feeding operations.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention provides a top stop for slide fasteners that is formed from a wire material and supplied when a top stop bent in a 0-shape is attached to a continuous fastener chain. This article relates to a fastening molding method and its device.

[Conventional technology]

The conventional technique for attaching top stops for slide fasteners is to open the fastener chain slightly from the space where the interlocking teeth of the continuous fastener chain are missing, and attach top stops formed in a 0 shape to the left and right zipper tapes. be. As an example of this type of technology, for example,
- The one described in Publication No. 61409 is known,
The invention disclosed in this publication involves holding a zipper chain horizontally, cutting a rectangular wire above the chain to form a top stop that bends downward into a U-shape, and attaching the left and right legs that open downward. Support one of the leg ends and press it downward toward the zipper chain, and press the supported side 0.
After the leg end comes into contact with the zipper chain, by pressing it further downward, the upper stopper rotates so as to fall sideways around the supported leg end, and the edge of the zipper tape is inserted into the open opening. and then attached by crimping.

Moreover, in order to form the top stop by bending it into a U-shape, a stop guide having a blade, a punch, a venter, etc. are used.

[Problem to be solved by the invention]

According to the above-mentioned conventional technology, the U-shaped top stopper is lowered with its open opening facing downward, and is placed in the fastener tape by rotating sideways. There was no guarantee that the top stopper would be inserted securely into the edge of the tape, which sometimes resulted in poor installation.

Therefore, by keeping the space part of the zipper chain horizontal and in a tensioned state and lifting the chevron-shaped triangular member from below, the space part is successively expanded, and both sides of the lower part of the triangular member are If four parts are provided, both edges of the expanded space part will be accommodated in the recess, so the upper stop bent in a U-shape will be inserted into both the recesses, and the opening opening of the upper stop will be connected to the opening of the recess. By setting them to match, the top stop can be reliably attached to the edge of the fastener tape.

In that case, contrary to the top stop forming means in the above-mentioned publication, it is necessary to supply the curved part of the top stop bent in a U-shape into the recess in advance. The above-mentioned molding method has not yet been established in the art.

The present invention provides a method and apparatus for forming a top stop for a slide fastener, which aims to reliably supply a U-shaped top stop to the above-mentioned concave portion, with both openings aligned with each other, and with a simple W4 structure. Our goal is to provide the following.

[Means to solve the problem]

The solution according to the present invention is to push and feed a top stop material cut from a wire rod into a length necessary for forming the top stop so that its longitudinal middle part is inserted into a fixed interval using a push rod. , the method is characterized in that it is bent into a U-shape by passing through the space, and the curved portion is sent out first.

In addition, the upper and lower molds are fixed to the tip of the casing with a space between them, a slider having a cavity containing the upper and lower molds is provided in the casing so as to be able to reciprocate toward the upper and lower molds, and a plunger is installed in the slider. The slider is provided with a through hole through which a wire made of synthetic resin is inserted into the cavity orthogonally to the longitudinal direction thereof, and the end edge of one of the upper and lower molds is provided. According to an apparatus characterized in that a cutting edge is formed in the apparatus.

[For production]

Therefore, by inserting the wire into the slider through the through hole and moving the slider forward toward the upper and lower molds, the wire is cut and at the same time, the tip of one lange comes into contact with the cut top stopper material, whereupon the slider The forward movement is stopped, but by further advancing the plunger independently, the middle part of the top stopper material is pushed into the upper and lower molds, and the middle part is curved and formed into a U-shape, and by extruding it as it is, the curved This is to send out the first part in advance.

〔Example〕

To specifically explain the forming method according to the present invention with reference to FIG. 1, a band-shaped wire rod 2 made of metal or thermoplastic synthetic resin is vertically raised from below and fed, and a top stop 1 is fed from the upper end.
Cut the length necessary to form the top stopper material 3, and while the cut top stopper material 3 remains upright, press the push rod 4 against the longitudinal center of the top stopper material 3 to fix it at intervals vertically. By pushing the top stopper material 3 toward a certain gap between the upper and lower molds 5°6, the top stopper material 3 is bent into a U-shape, and the curved portion 3a is sent out first.

A device that automatically realizes the above-mentioned molding method is shown in FIGS. 2 to 4.
．． A molding groove 8 is formed between the upper and lower molds 5 and 6, and the slider 9 is fitted into the casing 7 so as to be slidable in the front and rear direction with a first cylinder 10. The slider 9 has a U-shaped cross section, has a cavity 11 into which the upper and lower molds 5.6 are inserted, and has a through hole 12 at the front end of the bottom wall through which the strip wire 2 is inserted.

Moreover, the lower corner of the rear end surface of the lower die 6 is formed into a cutting edge 13. Further, inside the slider 9 is a push rod 4, and a rod 1 of a second cylinder 14 fixed to the rear of the slider 9.
5 so as to be able to reciprocate in the front and back direction, and the push rod 4 is formed to have a thickness that allows it to be inserted into the molding groove 8 between the upper and lower molds 5 and 6.

A feeder 16 is provided below the casing 7 to supply the required amount of the strip-shaped wire 2, and the feeder 16 includes a hand 18 that inserts the wire 2 and presses and holds the wire 2 with fingers 17 to move up and down. The guide 21 is fixed below the hand 18 and has a claw 20 that presses the wire 2 with the urging force of a spring 19.

With the above structure, the tip of the strip-shaped wire 2 has a through hole 1.
2 into the cavity 11 of the slider 9, and then by driving the slider 9 forward, the tip of the band-shaped wire 2 inserted into the cavity 11 moves forward together with the slider 9, and the through hole in the wire 2 is moved forward. 12 is cut by the cutting blade 13 of the lower mold 6 at the entrance of the wire 2, and at this time the push rod 4 moves forward together with the slider 9, but at the same time as cutting the wire 2, the slider 9 is stopped, and at the same time only the push rod 4 is driven further forward. By doing so, the cut upper stopper material 3 is inserted into the molding groove 8 between the upper and lower molds 5.6 while being bent.
Finally, the 0-shaped curved portion 3a is bent into a 0-shape and is advanced while being supported by the push rod 4.

In addition, the above-mentioned top stop forming device is built into the top stop mounting device shown in FIG. An upper jaw 23 having a triangular head is provided on the anvil 22 so as to be able to fall sideways, and on both sides between the upper jaw 23 and the anvil 22, as shown in FIG. A pocket 24, 24 is formed to hold the upper stop l which is bent to the side. Therefore, when the top stop 1 molded by the top stop forming apparatus according to the present invention is supplied into the pocket 24 with its curved part first and held in the pocket 24, the opening of the top stop 1 opens the pocket 24. It corresponds to the mouth.

Thereafter, by raising the anvil 22, the upper jaw 23
The zipper chain f is expanded to the left and right from the center by the triangular head, and when facing the pocket 24, the opposite edge of the zipper chain fits into the upper stopper 1 held in the pocket 24, where the upper jaw 23 is By overturning and retracting from above the anvil 22, the upper part of the upper stop 1 is released, and the ultrasonic or high frequency horn 25 is lowered from above to weld the upper stop 1 to the fastener chain f. .

〔Effect of the invention〕

According to the method for forming a top stopper for a slide fastener according to the present invention, a top stopper material cut from a wire rod is pushed toward the upper and lower molds using a push rod, and is bent into a 0-shape by being pushed through the space between the upper and lower molds. In addition, the curved part is fed out in advance, making the forming operation easy.Also, since the top end of the push rod can be supported while being formed and fed out, the feeding operation is also easy. It is something.

Further, according to the top stop forming device for slide fasteners according to the present invention, the slider through which the wire has been inserted is moved forward to cut the wire with the upper and lower dies that maintain the gap, and the push rod provided inside the slider is moved forward to cut the top end of the slide fastener. The stopper material is bent into a 0-shape in the upper and lower molds and then extruded as it is.It has a simple structure and can be reliably bent into a 0-shape, and can be cut and bent by moving the slider forward and pushing the push rod forward. Since these steps are performed all at once, the molding speed becomes faster and efficiency is improved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the steps of a method for forming a top stop for a slide fastener according to the present invention, FIG. 2 is a front view showing a top stop forming apparatus for a slide fastener according to the present invention with main parts thereof cut away, and FIG. is also a plan view, Figure 4 is an exploded perspective view of the main parts, Figure 5 is a perspective view showing an overview of the device with the top stop installed, and Figure 6 is a perspective view of the device with the top stop installed. It is a front view which expands and shows the pocket part of. l...Top stop 2...Wire rod 3...Top stop material 4
...Push rod 5...Upper die 6...Lower die 7...Casing 8...Molding groove 9...Slider 11.
...Cavity 12...Through hole 13...Cutter tube diagram Figure 8 Forming groove 2 Wire rod

Claims (1)

[Claims] 1. A top stopper material (3) cut into the length necessary to form the top stopper (1) from the wire rod (2) is pressed at the middle part in the longitudinal direction with a push rod (4). Push this top stop material (3) toward the upper and lower molds (5, 6) while pressing with the
6) Method 2 for forming a top stop for a slide fastener, characterized by bending it into a U-shape by passing it through the gap between them, and sending out the curved part (3a) first, the tip of the casing (7) The upper and lower molds (5, 6) are fixed at intervals, and the upper and lower molds (5, 6) are fixed in the casing (7).
5, 6) with a cavity (11) containing a slider (
9) is provided so as to be able to reciprocate toward the upper and lower molds (5, 6),
Insert the push rod (4) into the slider (9).
The slider (9) is provided with a through hole (12) through which the wire rod is inserted into the cavity (11) perpendicularly to the longitudinal direction thereof, and the upper and lower molds (5) ，
6) A top stop forming device for a slide fastener, characterized in that a cutting edge (13) is formed on the edge of one of the molds.