JPH0536045B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Application Field] The present invention provides an upper stop for slide fasteners that is formed from a wire material and supplied when a top stop bent in a U-shape is attached to a continuous fastener chain. This invention relates to a stop forming 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 U-shaped top stops to the left and right fastener tapes. be. This type of technology is known, for example, as described in Japanese Patent Publication No. 57-61409, and the invention according to this publication involves holding a fastener chain horizontally, cutting a rectangular wire above the fastener chain, and then cutting a rectangular wire downward. The top end is bent into a U-shape facing toward the fastener chain, and one of the left and right legs opened downward is supported, and the end of the leg on the supported side is pressed downward toward the fastener chain. By pressing further downward after contacting the fastener chain,
The upper stopper is rotated so as to fall sideways around the supported leg end, and the edge of the fastener 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 bender, etc. are used.

[Problem to be solved by the invention]

According to the above-mentioned conventional technology, the top stopper bent into a U-shape is attached to the fastener tape by lowering the top stopper with its opening facing downward and rotating it sideways, but even if it is turned sideways, the fastener There was no guarantee that the top stopper would be inserted into the edge of the tape reliably, and there were cases where installation errors occurred.

Therefore, by keeping the space part of the fastener chain in a horizontal and tensioned state and raising the mountain-shaped triangular member from below, the space part is successively expanded, and the lower part of the triangular upper member If recesses are provided on both sides, the good edges of the expanded space will fit into the recesses, so the upper stop bent in a U-shape can be inserted into both recesses so that the opening opening of the recess will fit into the opening of the recess. By setting it so that it matches, the top stopper 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 top stop forming device for a slide fastener, which is capable of reliably supplying a U-shaped top stop to the above-mentioned concave portion, with both openings of the top stop aligned with each other, and having a simple structure. It's about doing.

[Means to solve the problem]

The solution according to the present invention is to fix upper and lower molds to the tip of a casing with a space between them, and provide a slider in the casing with a cavity that encloses the upper and lower molds so that it can reciprocate toward the upper and lower molds, and the slider A plunger is provided inside the cavity so that it can move together with the slider and can reciprocate independently, and the slider is provided with a through hole through which a synthetic resin wire is inserted into the cavity orthogonally to the longitudinal direction of the cavity, and either one of the upper and lower types is provided. According to an apparatus characterized in that a cutting edge is formed on the edge of the mold.

[Effect]

Therefore, insert the wire into the slider through the through hole,
By moving the slider forward toward the upper and lower molds, the wire rod is cut, and at the same time, the tip of the plunger comes into contact with the cut upper stop material, stopping the advance of the slider there. By moving forward, 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 part is sent out in advance. be.

〔Example〕

The outline of the means for forming the top stop using the forming apparatus according to the present invention is as shown in FIG. Cut the length necessary to form the top stop 1, and while the cut top stop material 3 remains upright, a push rod 4 is brought into contact with the longitudinal center of the top stop material 3, leaving an interval vertically. By pushing it forward between the fixed upper and lower molds 5 and 6, the upper stopper material 3 is bent into a U-shape,
The curved portion 3a is sent out in advance.

Therefore, the molding apparatus according to the present invention will be specifically explained with reference to FIGS. 2 to 4. Upper and lower molds 5 and 6 are fixed to the front end of the casing 7, and a hole is inserted between the upper and lower molds 5 and 6 in the front and rear directions. A molding groove 8 is formed, and a slider 9 is fitted into the casing 7 so as to be slidable in the front-rear direction with a first cylinder 10. A through hole 12 through which the strip wire 2 is inserted is provided at the front end of the bottom wall. Moreover, the lower corner of the rear end surface of the lower die 6 is the cutting edge 1.
It is formed in 3. Further, inside the slider 9 is a push rod 4, and a second push rod 4 is fixed to the rear of the slider 9.
The push rod 4 is connected to the rod 15 of the cylinder 14 so as to be able to reciprocate in the front and back direction.
is formed in such a thickness that it can 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. The feeder 16 has a hand 1 that moves up and down by inserting the wire 2 and pressing the wire 2 with fingers 17.
8 and a claw piece 2 fixed below the hand 18 and pressing the wire 2 with the force of the spring 19.
0.

With the above structure, by inserting the tip end of the band-shaped wire rod 2 into the cavity 11 of the slider 9 through the through hole 12 and then driving the slider 9 forward, the band-shaped wire rod 2 inserted into the cavity 11 can be inserted into the cavity 11 of the slider 9. The tip of the wire rod 2 moves forward together with the slider 9, and the cutting edge 13 of the lower mold 6 moves forward at the entrance of the through hole 12 in the wire rod 2.
At this time, the push rod 4 moves forward together with the slider 9, but the slider 9 is stopped at the same time as the wire 2 is cut, and at the same time only the push rod 4 is further driven forward, thereby cutting the cut top stop material. 3 is inserted while being bent into the molding groove 8 between the upper and lower molds 5 and 6, and is finally bent into a U-shape, and is supported by the push rod 4 to advance the U-shaped curved portion 3a in advance. It is.

The above-mentioned top stop forming device is incorporated into the top stop attaching device shown in Fig. 5, and the top stop attaching device is provided with an anvil 22 movable up and down below the running path that horizontally guides the fastener chain f. , an upper jaw 2 having a triangular head on an anvil 22;
3 is provided so as to be able to fall laterally, and on both sides between the upper jaw 23 and the anvil 22, as shown in FIG.
Pocket 2 that holds the U-shaped upper stopper 1
4 and 24 are formed. Therefore, when the top stop 1 molded by the top stop forming apparatus according to the present invention is fed into the pocket 24 with its curved part first and held in the pocket 24, the open opening of the top stop 1 will be inserted into the pocket 24. This corresponds to the open opening.
Thereafter, by raising the anvil 22, the fastener chain f is expanded to the left and right from the center by the triangular head of the upper jaw 23, and when facing the pocket 24, the opposing edges of the fastener chain are held in the pocket 24. It fits into the top stopper 1. Then, by overturning the upper jaw 23 from the anvil 22 and retracting it, the upper part of the upper stop 1 is released.
Lower the upper stopper 1 and attach it to the fastener chain f.
It is welded to.

〔Effect of the invention〕

According to the top stop forming device for a slide fastener according to the present invention, the slider through which the wire has been inserted is advanced and cut by the upper and lower dies that maintain the gap, and
The push rod installed inside the slider is moved forward to bend the cut top stopper material into a U-shape within the upper and lower molds, and the curved part is pushed out first.The structure is simple and the U-shape is reliably formed. Furthermore, the cutting and bending processes can be performed at the same time by the advance of the slider and the extension bar, and the tip of the push bar can be supported and sent out with the top stop still formed. As a result, the molding speed becomes faster and efficiency is improved.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the outline of the molding process using the top stop forming device for slide fasteners according to the present invention, and FIG. 2 is a front view showing the top stop forming device for slide fasteners according to the present invention with its main parts cut away. , Fig. 3 is a plan view, Fig. 4 is an exploded perspective view of the main parts, Fig. 5 is a perspective view showing an overview of the top stop attachment device incorporating this device, and Fig. 6 is a top stop. FIG. 3 is an enlarged front view of the pocket portion of the attachment device. 1...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 ... Cutting blade.

Claims (1)

[Claims] 1. A slider 9 having upper and lower molds 5 and 6 fixed to the tip of the casing 7 with a space between them, and a cavity 11 that encloses the upper and lower molds 5 and 6 within the casing 7.
A push rod 4 is provided in the slider 9 so that it can move back and forth toward the upper and lower molds 5 and 6, and a push rod 4 is provided in the slider 9 so that it can move together with the slider 9 and can move independently. A top stop forming device for a slide fastener, characterized in that it is provided with a through hole 12 inserted perpendicularly to the longitudinal direction, and a cutting edge 13 is formed on the edge of one of the upper and lower molds 5 and 6.