JPS6313207Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention moves the upper die and the lower die relatively to pierce the pillar part of the stud into the fabric, and swages the button body and the button together. The present invention relates to an upper mold for fastening a button used in a fastening button mounting device.

Prior Art A button attachment device for attaching swage-type buttons such as snap buttons or jeans buttons to fabric generally involves fitting the main body of the button into a storage recess formed in the center of the lower surface of an upper mold, and placing the studs on the lower mold. After that, with the dough placed between the upper mold and the lower mold, the upper mold is lowered toward the lower mold, thereby compressing the dough between the dough pressers of the upper mold and the lower mold, It is configured to pierce the pillar part of the stud into the fabric, deform the pillar part, and caulk and fix the button main body and the stud.

Conventionally, the upper die used in this type of button mounting device has a locking protrusion such as a protrusion or a protrusion formed on the side surface of the storage recess, and the locking projection prevents the button body stored in the storage recess from falling. Therefore, the storage recess has a complicated shape, and therefore, the processing of the storage recess is troublesome. Furthermore, due to machining errors in the locking protrusion, the storage recess, and/or the button main body, the button main body may fall from the storage recess, and if the locking protrusion wears out, the upper mold itself becomes unusable. There were some shortcomings such as folding.

Purpose of the invention The present invention can prevent the button parts from the locking protrusion from falling from the storage recess without forming the locking protrusion in the storage recess.
To provide an upper mold for caulking a button, which can hold button parts in a correct state even if there is a machining error in a storage recess or button parts, and can make the storage recess into a simple shape.

Structure of the Device According to the present invention, a pin insertion hole is formed in the upper mold, penetrating from the storage recess for storing the button parts to the outer periphery of the side part, and a lock pin is inserted into the pin insertion hole so that the tip of the lock pin is inserted into the storage recess. The lock pin is inserted so as to be retractable and retractable, and the lock pin is biased toward the storage recess by a spring provided on the upper mold, so that the tip of the lock pin protrudes into the storage recess, and the button part in the storage recess is pushed by the lock pin. This is achieved by having a configuration in which it is pressed and held.

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

First, the outline of the button mounting device will be explained.

The button attaching device shown in FIG. 1 includes a frame 1, an upper mold 2 and a lower mold 3 for caulking, and an air cylinder 4 that moves the upper mold 2 up and down with respect to the lower mold 3.

The frame 1 integrally includes an upper arm 10, a lower arm 11, and a mounting portion 12 mounted on a base (not shown). A receiving portion 13 is formed at the tip of the upper arm 10, and a supporting portion 14 facing the receiving portion 13 is formed at the tip of the lower arm 11.

A receiving hole 15 is formed in the receiving part 13 and passes through the receiving hole 15 in the vertical direction, and a bush 16 is inserted into the lower part of the receiving hole 15. The bush 16 is attached to the receiving portion 13 by a set screw 17, and a rod 18 is fitted into the bush 16 so as to be movable up and down. The rod 18 has a flange portion at its upper end, and is always urged upward by a tension coil spring 19 provided between the flange portion and the bush 17. The upper end of the rod 18 is connected to the piston rod 20 of the air cylinder 4, and the lower end is attached to the upper mold 2 by a screw 21.

A support hole 22 also extends through the support portion 14 in the vertical direction.
is formed, and a support shaft portion 54 of the lower mold 3 is inserted into this support hole 22 . The lower mold 3 is attached to the support part 14 with screws 23.

The air cylinder 4 is fixed to the upper end of the receiving part 13 by a screw (not shown), and when the piston rod 20 protrudes, the rod 18 is lowered against the force of the spring 19, and the upper mold 2 is moved to the lower mold. 3 and the piston rod 20 retreats, causing the rod 18 to rise by the force of the spring 19, causing the upper die 2 to retreat upward from the lower die 3.

Next, the upper mold and lower mold will be explained.

The upper mold 2 is composed of a punch 30 and a dough presser 31, as shown in FIGS. 2 and 3.
The lower part of the punch 30 is made to have a smaller diameter than the upper part and serves as an upper die part 46.
6 is a storage recess 32 with a downward opening that stores the button main body 5.
is formed. The upper part of the punch 30 has a fitting groove 33 with a downward opening into which the lower end of the rod 18 is fitted.
A female threaded hole (not shown) for a screw 18 for attaching the upper die 2 to the rod 18 is formed. The punch 30 has the storage recess 32
A pin insertion hole 34 is formed to penetrate from the side to the outer periphery.

The dough presser 31 is formed into an annular shape and is attached to the punch 30 with a screw 35 with the upper die portion 46 of the punch 30 fitted into a central hole. The lower surface of the dough presser 31, that is, the dough presser surface 36, is a conical concave surface that continues to the lower surface of the punch 30. The dough pressing surface 3 relative to the horizontal surface
The angle θ of No. 6 is about 45 degrees in the illustrated example, but it can be set to any value.

A pin insertion hole 37 is formed in the dough presser 31 and continues from the outer peripheral side of the side portion to the pin insertion hole 34 of the punch 30 . The pin insertion hole 37 has a small diameter portion 38 having the same diameter as the pin insertion hole 34 of the punch 30 in the center side, but
A locking stepped portion is formed at the boundary between the narrow diameter portion 38 and the large diameter portion 39.

A lock pin 40 is inserted into the pin insertion holes 34 and 37. The lock pin 40 has a shaft portion 41 with a small diameter and a head portion 42 that is thicker than the shaft portion 41.
1 is the narrow diameter part 38 of the pin insertion hole 37 and the pin insertion hole 3
4, the head 42 is inserted into the large diameter portion 39 of the pin insertion hole 37, and the tip is inserted into and retracted from the storage recess 32. This lock pin 40 has a shaft portion 41 whose tip is connected to the storage recess 32.
The button main body 5 stored in the storage recess 32 is thereby prevented from falling. The tip of the lock bin 40 is formed into a spherical shape.

In the illustrated example, the spring 43 is a tension coil spring with both ends connected to each other to form an annular shape.
It is provided in a groove 44 having an arcuate cross section formed on the outer periphery of the dough presser 31. The groove 44 is formed at a location corresponding to the pin insertion hole 37 of the fabric presser 31.

The lower mold 3 has a punch die 50 and a dough presser 51. The punch die 50 has a flange portion 52 formed at the center in the longitudinal direction, the upper side of this flange portion 52 becomes a rod-shaped lower die portion 53, and the lower side of the flange portion 52 fits into the support hole 22 of the support portion 14. The support shaft portion 54 is inserted.

The dough presser 51 is formed in a cylindrical shape with a flange portion 55 at the upper end, and the upper surface, that is, the dough presser surface 56, is a conical protrusion that is substantially the same as the dough presser surface 36 of the upper mold 2. A lower die portion 53 of the punch die 50 is inserted into the hollow portion of the dough presser 51 so as to be vertically movable. A pair of elongated holes 57, 57 extending in the vertical direction are formed facing each other in a portion below the flange portion 55 of the dough presser 51.
An end of a guide pin 58 provided through the lower die portion 53 of the punch die 50 is loosely inserted into the elongated holes 57 , 57 .

The dough presser 51 is constantly urged upward by a compression coil spring 59 provided between its flange portion 55 and the flange portion 52 of the punch die 50.
It protrudes above the upper surface of the punch die 50.

This button attachment device places the studs 6 on the punch die 50, fits the button main body 5 into the storage recess 32 of the punch 30, then places the fabric 7 on the fabric presser foot 51 of the lower mold 3, and then is lowered toward the lower mold 3, and then the upper mold 2 is raised.

In this way, as the upper mold 2 descends, the dough 7 is first compressed by the dough pressers 31 and 51, and then the dough presser 51 of the lower mold 3 resists the elastic force of the compression coil spring 59. is lowered relative to the punch die 50, the column part of the stud 6 pierces the fabric 7, and the tip end portion of the column part of the stud 6 is pressed against the pressing surface 45 of the punch 30, as shown in FIG. The button main body 5 and the stud 6 are crimped and fixed.

In the above-mentioned upper mold 2, when the button main body 5 is not stored in the storage recess 32, the head 42 of the lock pin 40 comes into contact with the step at the boundary between the narrow diameter part 38 and the large diameter part 39 of the pin insertion hole 37. A spherical portion at the tip of the lock pin 40 is projected into the storage recess 32 by a spring 43. Furthermore, when the button main body 5 is pushed into the storage recess 32, the spherical portion at the tip of the lock pin 40 retreats into the pin insertion hole 34, but since it is urged toward the storage recess 32 by the spring 43, The lock pin 40 presses the button main body 5 in the storage recess 43, thereby pushing the button main body 5 from the storage recess 43.
prevent it from falling. Furthermore, after crimping and fixing the button body 5 and the studs 6, simply pull down the fabric 7.
The button main body 5 can be removed from the upper mold 2.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can be applied to, for example, a crimping device for a button attachment device that moves the lower mold 3 up and down relative to the upper mold 2. Furthermore, in the above-described embodiment, an upper die used for a button mounting device for caulking and fixing a button body and a rivet has been described, but the present invention is an upper die for a device for fitting a decorative cap onto a button body or a rivet. It can also be applied to

Effects of the invention As described above, the present invention forms a pin insertion hole in the upper mold that penetrates from the storage recess for storing the button parts to the outer periphery of the side, and inserts the lock pin into the pin insertion hole so that the tip of the lock pin protrudes into the storage recess. The lock pin is urged toward the storage recess by a spring provided on the upper die, so that the tip of the lock pin protrudes into the storage recess, and the lock pin locks the button part in the storage recess. Since it is held by pressing, there is no need to form a locking protrusion in the storage recess, and the storage recess can have a simple shape. Further, since the lock pin is biased toward the storage recess by the spring, the button component can be held in the correct state even if there is a machining error in the storage recess or the button component. Additionally, when the lock pin becomes worn, only the lock pin needs to be replaced.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an embodiment of a button mounting device provided with an upper mold according to the present invention, Fig. 2 is a longitudinal sectional view showing an embodiment of the upper mold and the lower mold, and Fig. 3 is a diagram showing the upper mold and the button mounting device according to the present invention. It is an explanatory diagram of the operation of the lower die. 2: Upper mold, 2: Lower mold, 5: Button main body, 6: Stud,
7: Fabric, 32: Storage recess, 34, 37: Pin insertion hole, 40: Lock pin.

Claims (1)

[Scope of utility model registration request] A storage recess 32 for storing the button parts is formed at approximately the center of the lower surface, and pin insertion holes 34 and 37 are formed penetrating from the storage recess 32 to the outer periphery of the sides, and the lock pin 40 is inserted into the pin insertion holes 34 and 37. An upper mold for fastening a button, which is provided with a spring 43 whose tip end is movable into and out of the storage recess 32 and which biases the lock pin 40 toward the storage recess 32.