JPS6240796Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application This invention is based on the invention, after cutting the fastener elements of a slide fastener chain in an engaged state,
The present invention relates to a punch used in a device that forms a space by moving a cut fastener element while holding it there and extracting it from a fastener tape, and more specifically relates to a punch that presses a fastener element in a space forming part against a cutting blade of a fixed die.

Prior Art A device that creates a space by cutting the coiled fastener elements of a slide fastener chain in an engaged state and then moving the cut fastener elements while holding them and pulling them out from the fastener tape is a device that creates a space by cutting the coiled fastener elements of a slide fastener chain in an engaged state, and then moving the cut fastener elements while holding them and pulling them out from the fastener tape. The fastener element is held between the gripper and the lower gripper, and the engaged part of the fastener element to be cut is pressed with a punch toward the cutting blade of the lower fixed die, so that the fastener element is cut at the part on the engaging head side. (Special Publication No. 45-297).

However, in the conventional punches used in this type of device, the element pressing surface is flat or arcuate, so when the fastener element is pressed against the cutting blade of the fixed die, the fastener element moves in the longitudinal direction relative to the punch. Therefore, the positioning of the space forming part is unstable. In addition, when the cut fastener element is pulled out from the fastener tape by holding it together with the knockout and lifting it up or pushing it down, the cut fastener element moves in the longitudinal direction with respect to the punch or the knockout, and as a result, the fastener element at the end part Sometimes it came off the punch and knockout, and I failed to pull out the fastener element at the end.

Purpose of the Invention An object of the present invention is to provide a space-forming punch that allows easy positioning of the space-forming portion and prevents the cut fastener element from failing to be pulled out from the fastener tape.

According to the present invention, the above object is achieved by forming protruding teeth that protrude further than the element pressing part at least at one end in the longitudinal direction of the element pressing part of the punch, and preventing movement of the fastener element with respect to the punch by the protruding teeth. This is achieved by creating a configuration that allows

Embodiments Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

In Figures 1 to 3, 1 is frame 2.
A storage cavity 3 that opens upward and downward is formed in the center of the base. The storage cavity 3 extends in the front-rear direction of the base 1 (transfer direction of the fastener chain, that is, the normal direction in FIG. 2), and has a wide lower part 3a and a narrow upper part 3b.

A movable table 4 extending along the storage cavity 3 is provided at a lower portion 3a of the storage cavity 3 so as to be movable up and down. The movable table 4 has an inverted T-shaped cross section and is connected to a plunger 5 attached to the frame 2.

A plurality of compression coil springs 6 are provided between the base 1 and the movable table 4. The movable table 4 has the spring 6
The base 1 is constantly urged downward by the
When the plunger 5 is actuated, it is raised against the force of the spring 6.

A pair of lower grippers 7, 7 extending along the storage cavity 3 are provided on the upper part 3b of the storage cavity 3 so as to be movable up and down. Each lower gripper 7, 7 is made in a symmetrical formation with engagement steps 9, 9, 10, 10 projecting inwardly at the top and bottom of the grooves 8, 8 formed in the center of the sides. and grooves 8, 8,
The engaging step portions 9, 9, 10, and 10 are spaced apart from each other in the left-right direction (the width direction of the fastener chain, that is, the left-right direction in FIG. 2) while facing each other. Each concave groove 8, 8 and engaging step portion 9, 9, 10,
10 extends in the longitudinal direction (front-back direction) of the lower grippers 7, 7.

A head 13 of a protrusion 12 extending in the front-rear direction at the center of the upper surface of the movable table 4 in the width direction is fitted into the lower part of the space 11 formed by the grooves of the lower grippers 7, 7. A pair of left and right fixed dies 14, 14 extending in the front-rear direction, that is, in the same direction as the lower grippers 7, 7, are fitted into the upper portion of the grippers 11.

The lower grippers 7, 7 are constantly urged upward by a plurality of compression coil springs 15 provided between the lower grippers 7 and the movable table 4, so that the lower engagement steps 10, 10 are pressed against the head 13 of the protrusion 12. is engaged with. Further, the lower grippers 7, 7 are integrally fixed to each other at both ends in the front and back direction, and the upper surface is normally flush with the upper surface of the base 1, that is, the guide surface for the fastener chain, but the plunger 5 is activated. Then, it rises to face the base 1 via the movable base 4 and the compression coil spring 15.

The fixed dies 14, 14 extend in the front-rear direction, that is, in the same direction as the lower grippers 7, 7, and are fixed to the base 1 at both ends in the front-rear direction while being separated from each other in the left-right direction. The upper part of the fixed die 14, 14 is the engagement step part 9, which is the upper part of the lower gripper 7, 7.
Cutting blade portions 16, 16 extend between the engagement step portions 9, 9 along the engaging step portions 9, 9. The sharp blades at the upper ends of the cutting blades 16, 16 are normally located slightly below the upper surfaces of the lower grippers 7, 7.

Between the fixed dies 14, 14, the upper part of a plate-shaped knockout 17 is provided so as to be movable up and down. This knockout 17 has its lower part fixed to the head 13 of the protrusion 12 of the movable table 4, and is normally retracted between the fixed dies 14, 14, but when the plunger 5 is actuated, the knockout 17 4 protrudes upward from between the fixed dies 14, 14. A groove 18 having a V-shaped cross section is formed in the upper surface of the knockout 17 in the longitudinal direction.

The upper surfaces of the lower grippers 7, 7 serve as clamping surfaces that clamp the fastener tapes 50, 50 of the fastener chain against the lower surfaces of the upper grippers 30, 30, and a large number of small protrusions 19 are formed on each clamping surface.

A plate 21 is installed above one side of the base 1 in the left and right direction, and is attached to the base 1 with a space 20 in between. A stopper 22 is provided so as to be movable up and down.

The stopper 22 has a lower end bent laterally,
This bent portion 23 protrudes laterally from a downward opening notch 25 formed in the lower part of the plate 21, and is normally connected to the compression coil spring 2 provided between it and the base 1.
4, the bent portion 23 is forced upwardly from the notch 25.
It comes into contact with the upper surface of the base 1, and its upper part protrudes from the upper surface of the base 1.

The upper grippers 30, 30 are provided on the upper surface of the base 1 so as to be separated from each other in the left and right directions, and guide recesses 32, 32 cut out from the lower surface side are formed at the tip portions of opposing portions 31, 31 that face each other. , upper portions of the guide recesses 32, 32 form locking step portions 33, 33 that protrude toward the mating side.

The lower surfaces of the opposing portions 31, 31 face the upper surfaces of the lower grippers 7, 7 and are slightly separated from the upper surfaces of the lower grippers 7, 7. In addition, small protrusions 3 are provided on the lower surfaces of the opposing parts 31, 31.
4 are formed in large numbers.

Upper gripper 30 located on the stopper 22 side
is provided so as to be retractable relative to the upper gripper 30 on the other side, and is normally maintained in the correct position by the stopper 22 and spacer 26. Also,
The upper gripper 30 on the stopper 22 side is
A rod-shaped handle 27, which is provided on the opposite side of the stopper 22 and whose lower end surface is in contact with the bent part 23 of the stopper 22, is provided so as to be movable up and down. It can be retracted against the upper gripper 30 on the side.

The spaces between the lower surfaces of the opposing portions 31, 31 of the upper grippers 30, 30 and the upper surfaces of the lower grippers 7, 7 form guide spaces 28, 28 for the fastener tapes 50, 50 of the fastener chain.

A punch 40 of the present invention is provided above the upper grippers 30, 30. As shown in FIGS. 3 and 4, the punch 40 has a plate-shaped main portion 4.
1, and reinforcing parts 42 and 4 thicker than this main part 41.
2, and the lower end portion of the main portion 41 is formed into an arcuate surface and serves as an element pressing portion 43. The reinforcing parts 42, 42 are formed in the vertical direction of the side part of the main part 41, and have sharp protruding teeth 44 that protrude further than the element pressing part 43 at their lower ends.

This punch 40 is attached to a vertically movable base 46 via a support base 45 so that the element pressing portion 43 faces the groove 18 on the upper surface of the knockout 17 and extends in the transport direction of the fastener chain. It is moved up and down by a drive mechanism 47, such as a plunger or an air cylinder, which supports 46.

Next, the operation of the space forming device will be explained with reference to FIGS. 5A to 5E and FIGS. 6A and 6B.

First, in order to set the long fastener chain in the space forming device, the coiled fastener elements 51, 51 are moved together with the upper gripper 30 on the stopper 22 side retracted from the upper gripper 30 on the other side. After inserting the tip of one of the fastener tapes 50 of the engaged fastener chains into the one space 28 with the fastener elements 51, 51 on the upper side and entering the guide recess 32, the upper gripper that had been retreated was inserted. 30 may be advanced to a fixed position and its movement may be stopped by the stopper 22.

When installed in this way, the fastener chain is attached to the fastener tape 50, as shown in FIG. 5A.
50 is the lower gripper 7, 7 and the upper gripper 30,
Fastening elements 51, 51, which are located in the spaces 28, 28 between 30 and engage with each other, are located in the guide recesses 32, 32 of the upper grippers 30, 30.

When creating a space in the fastener chain installed in this way, first the plunger 5 is actuated by a predetermined amount to raise the lower grippers 7, 7, thereby lifting the lower grippers 7, 7 and the upper grippers 3.
Fastener tapes 50 and 50 are sandwiched between the tapes 0 and 30. In this state, the fastener tapes 50, 50 are lifted by the rise of the lower grippers 7, 7, so the cutting blades 16, 16 of the fixed dies 14, 14 are cut by the rise of the lower grippers 7, 7, that is, the space 28, It is located further below the fastener tapes 50, 50 by a height of 28. In addition, in this state, the protruding teeth 44, 4 of the punch 40
4 is apart from the fastener element 51, as shown in FIG. 6A.

Next, the drive mechanism 47 is activated to lower the punch 40. During this downward movement, the punch 40 first pushes down the engaging head of the fastener element 51 with its element pressing portion 43, as shown in FIG. 5B.
As shown in FIG. 5C, the engaging heads of the fastener elements 51, 51 to the fastener tapes 50, 50 are exposed to the cutting blades 16, 16 of the fixed dies 14, 14, and then, as shown in FIG. 5C, Cut the lower part of the fastener element 51 into the cutting blade part 1.
6, 16 to cut.

At this time of descent, the punch 40 presses the fastener element 51 with the element pressing part 43;
The element pressing portion 43 is the fastener element 5
1, the protrusions 44, 44 reach the fastener element 51 and enter between adjacent fastener elements as shown in FIG. The fastener element 51 does not move in the longitudinal direction of the element pressing portion 43, that is, in the left-right direction in FIG. 6B, and is naturally positioned. Further, even if the protruding teeth 44, 44 come into contact with the upper surface of the fastener element 51 when the punch 40 descends, since the fastener element 51 has a circular cross section, the protruding teeth 44, 44 will contact the fastener element as the punch 40 descends. By sliding, the protrusions 44, 44 naturally fit between adjacent fastener elements.

When the cutting of the fastener element 51 is completed, the plunger 5 is operated again and the drive mechanism 47 is operated in the opposite direction to raise the knockout 17 and the punch 40. As a result, as shown in FIG. 5D, the cut fastener element 51 is lifted up with the area near the engagement head being pressed by the knockout 17 and the punch 40.
As the knockout 17 and punch 40 rise above the upper grippers 30, 30 as shown in FIG. 5E, the fastener tapes 50, 50
be extracted from.

When the cut fastener elements 51, 51 are removed from the fastener tapes 50, 50, the protruding teeth 44, 44 of the punch 40 remain inserted between the adjacent elements, and therefore the cut fastener element is prevented from moving in the longitudinal direction of the element pressing part 43 and does not come out from between the protruding teeth 44, 44, so that the cut fastener element is not missed in being removed from the fastener tape.

When the cut fastener elements 51, 51 are removed from the fastener tapes 50, 50, the plunger 5 descends, and the knockouts 17 and lower grippers 7, 7 descend, returning to the state shown in FIG. 5A.

Thereafter, after conveying the fastener chain by a predetermined amount, the above-described operation is performed.

FIG. 7 shows the element pressing portion 43 of the punch 40.
This is an embodiment of a punch in which protruding teeth 44 are provided at one end in the longitudinal direction. The protruding tooth 44 is provided at one end (right side in FIG. 6) of the space forming portion of the slide fastener chain and on the side where the connection reversal portion 52 of the fastener element is inclined with respect to the fastener tape.

Effects of the invention As described above, the present invention is a punch in which protruding teeth are formed that protrude further than the element pressing portion, so when the fastener element is pressed, the protruding teeth enter between adjacent fastener elements, causing the fastener element to move. Therefore, the positioning of the space forming portion is performed naturally, and there is no possibility of failing to pull out the cut fastener element from the fastener tape.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of a space forming device using a punch according to the present invention, Fig. 2 is a sectional view taken along the line - - of Fig. 1, and Fig. 3 is an embodiment of a punch according to the present invention. 4 is a sectional view taken along the line -- in FIG. 3, FIGS. 5 and 6 are explanatory views of the operation, and FIG. 7 is a front view showing another embodiment of the punch. 40: Punch, 43: Element pressing part, 4
4: protrusion, 50: fastener tape, 51: fastener element.

Claims (1)

[Claims for Utility Model Registration] The coil-shaped fastener element 51 of the space forming part of the fastener chain is fixed to the fixing die 14.
In the punch 40 that presses against the cutting blade portion 16 of the punch 40, the punch 40 includes a plate-shaped main portion 41 having an element pressing portion 43 whose lower end portion is an arcuate surface;
A punch for forming a space for a slide fastener chain, characterized in that a sharp protruding tooth 44 that protrudes further than the lower end of the element pressing part 43 is provided at at least one end in the longitudinal direction of the element pressing part 43.