JPS6313208Y2 - - 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 a caulking device comprising the above-mentioned upper die and lower die used in a button attachment device to be fixed.

Prior Art A button attachment device for attaching crimping-type buttons such as snap buttons or jeans buttons to fabric generally involves fitting the main body of the button into an upper mold, placing studs on a lower mold, and then attaching the fabric to the upper mold and the lower mold. By lowering the upper mold toward the lower mold with the upper mold placed between the molds, the dough is pressed between the dough holding parts of the upper mold and the lower mold, and the pillars of the studs are pierced into the dough. The button main body and the stud are crimped and fixed by deforming the pillar portion.

However, in the conventional crimping device that consists of an upper mold and a lower mold used in this type of button attachment device, the part of the upper mold and the lower mold that pinches the fabric is a flat surface extending in the horizontal direction, so when crimping There was a drawback in that the pillars of the studs wrapped the fabric inside the main body of the button, resulting in the fabric around the button being pulled and wrinkled around the area where the button was attached.

In order to eliminate this drawback, conventional methods used to pull the fabric from side to side with both hands when crimping, but even with this method, it was possible to avoid wrinkles in the left and right parts of the fabric (in the direction of pulling). Wrinkles occur in the direction (perpendicular to the pulling direction).

Purpose of the invention This invention eliminates the need to apply manual tensile force to the fabric during crimping, without causing wrinkles in the fabric.
To provide a crimping device which allows a button to be easily and beautifully attached to fabric and does not damage the fabric.

Structure of the invention According to the invention, the upper mold is provided with an annular dough presser around the upper mold die part, the lower mold is provided with an annular dough presser around the lower mold die part, and both the dough Among the pressers, one of the dough pressers is divided into at least three parts, and the dough presser surface is made into a conical concave surface.
The other fabric presser has a fabric presser surface with a protruding surface having approximately the same shape as the concave surface, and an engaging protrusion that prevents the fabric presser divided into multiple pieces from spreading out is formed on the outer peripheral side of the fabric presser surface. Furthermore, the dough presser divided into multiple pieces is tightened by a spring provided on its outer periphery to maintain it in an annular state. This is achieved by stretching the fabric in the radial direction using both fabric pressing surfaces.

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 die 2 and a lower die 3 of the crimping device of the present invention, and an air cylinder 4 that moves the upper die 2 up and down with respect to the lower die 3. There is.

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.
A support shaft portion 54 of the lower die 3 is inserted into the 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 crimping device 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.
A downward-opening storage recess 32 is formed in which the button main body 5 is stored. A fitting groove 33 with a downward opening into which the lower end of the rod 18 fits is formed in the upper part of the punch 30, and a female screw hole (not shown) for a screw 18 for attaching the upper die 2 to the rod 18 is formed. ing. The punch 30 is formed with a pin insertion hole 34 that penetrates from the storage recess 32 to the outer periphery of the side portion.

The dough presser 31 is formed into an annular shape, and a protrusion 47 formed on the upper part of the inner surface is fitted into an annular groove 48 formed on the upper outer periphery of the upper die part 46. The lower surface of the dough presser foot 31, that is, the dough presser surface 3
6 is a conical concave surface that continues to the lower surface of the punch 30. The angle θ of the fabric pressing surface 36 with respect to the horizontal plane is about 45 degrees in the illustrated example, but it can be set to any value. The fabric presser 31 includes three members 311, 312, 313, as shown in FIG.
There is also a spring 4 installed on the outer periphery of the side.
3 tightens each member 311, 312, 313 to maintain an annular state, and maintain a state in which the protrusion 47 is fitted into an annular groove 48 formed on the outer periphery of the punch 30.

One of the members constituting the dough presser 31 includes:
The pin insertion hole 34 of the punch 30 is inserted from the side outer circumferential side.
A pin insertion hole 37 is formed following the . 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 at the center side, but a large diameter portion 39 having a larger diameter than the pin insertion hole 34 at the outer side. 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 pin 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 fabric presser 51 is formed into an annular shape having a flange portion 55 at the upper end, and the center side portion of the upper surface is a fabric presser surface 56, and the outer side of the fabric presser surface 56 is the engaging protrusion 60. It's summery. The dough pressing surface 56 is a conical protruding surface that is substantially the same as the dough pressing surface 36 of the upper die 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 that extend in the vertical direction are formed facing each other in a portion below the flange portion 55 of the dough presser 51, and the lower die portion 53 of the punch die 50 is inserted into the elongated holes 57, 57. An end portion of a guide pin 58 provided through the guide pin 58 is loosely inserted. The engaging protrusion 60 is formed in an annular shape concentric with the fabric pressing surface 56.

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 crimping 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 51 of the lower die 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.

According to this crimping device, the fabric pressing surface 36 of the fabric presser 31 is a conical concave surface, whereas the fabric pressing surface 56 of the fabric presser 51 is a conical protruding surface,
Moreover, since the fabric presser foot 31 is divided into three parts, when the fabric 7 is pinched by both fabric pressers 31 and 51, the fabric presser foot 31 expands outward against the force of the spring 43, and as a result, the fabric A diagonally downward force along the pressing surfaces 36, 56, that is, an outward force is applied to the portion of the fabric 7 that is being pressed. For this reason,
Of the dough 7, the inner part of the dough pressers 31 and 51, that is, the upper die part 46 and the lower die part 53
The part facing the stud 6 is pulled in the radial direction and is in a state where it can be easily cut by the pillar part of the stud 6.
The button main body 5 and the rivet 6 can be crimped and fixed without causing the fabric 7 to get caught up in the fabric 7, and the button main body 5 and the stud 6 can be crimped and fixed without causing any damage to the fabric 7, and wrinkles are not generated around the rivet attachment part of the fabric 7. Further, since the engaging protrusion 60 is formed on the dough presser 51 of the lower mold 3, when the dough presser 31 of the upper mold 3 expands against the force of the spring 43, the outer circumference of the lower end of the dough presser 31 It comes into contact with the engaging protrusion 60 and prevents the fabric presser 31 from spreading further.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and can be applied, for example, to a caulking device for a button attachment device that moves the lower mold 3 up and down relative to the upper mold 2, The dough pressing surface 36 may be a conical protruding surface, and the dough pressing surface 56 of the lower mold 3 may be a conical concave surface.

Effects of the invention As described above, the present invention provides ring-shaped dough pressers around the upper and lower die parts, and one of the dough pressers is divided into at least three parts. At the same time, since the dough presser has a conical protruding surface, and the dough presser of the other dough presser has a concave surface with almost the same shape as the protruding surface, when the dough is pinched between both dough pressers, multiple The split fabric presser foot spreads outward, so that the portion of the fabric inside the fabric presser is pulled radially, thus eliminating wrinkles in the fabric without applying manual tension to the fabric; The button can be easily and beautifully attached to the fabric without damaging the fabric. In addition, since a spring is provided around the outer periphery of the dough presser, which is divided into multiple pieces, to tighten the dough presser, even if the dough presser presses the dough and spreads outward, it will naturally release the pressure on the dough. to return to its original state.
Furthermore, when an engaging protrusion is formed on a dough presser that is not divided into multiple parts and the dough is pressed, the spread of the multiple division dough presser is restricted. The presser foot for multiple pieces of dough will not fall apart.

[Brief explanation of drawings]

Fig. 1 is a diagram showing an embodiment of a button mounting device equipped with a crimping device according to the present invention, Fig. 2 is a longitudinal cross-sectional view showing an embodiment of the crimping device according to the present invention, and Fig. FIG. 4, which is an explanatory diagram of the operation of the crimping device, is a sectional view showing an embodiment of the upper mold presser.

Claims (1)

[Scope of utility model registration request] Consisting of an upper mold 2 and a lower mold 3, the upper mold 2 is provided with an annular dough presser 31 around the upper die part 46, and the lower mold 3 is provided with a dough presser 51 around the lower die part 53. Of the two fabric pressers 31 and 51,
One dough presser 31 is divided into at least three parts and has a dough pressing surface 36 with a conical concave surface, and the other dough presser 51 has a dough pressing surface 56 with a convex surface having almost the same shape as the concave surface and is divided into multiple parts. An engaging protrusion 60 is formed on the outer peripheral side of the dough pressing surface 56 to prevent the dough presser 31 from spreading,
The crimping device further comprises a crimping device in which the fabric presser 31, which is divided into a plurality of pieces, is tightened by a spring 43 provided on its outer periphery to maintain it in an annular state.