JPH0513618U - Caulking device - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a crimping device which has almost the same shape of the crimped portion of the eyelet and can be made constant at any time. [Structure] In a caulking device 1 having a head 2 at one end of a substantially columnar portion 3, a protrusion 4 is provided on the surface of the columnar portion 3, and the protrusion 4 is a column of the columnar portion 3. Are formed along the circumference and at substantially equal intervals with respect to the circumference.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a caulking device for caulking an eyelet.

[0002]

[Prior Art]

 FIG. 4 is a perspective view of an eyelet crimped by the conventional method, and FIG. 5 is a perspective view of the eyelet crimped by the conventional method.

Conventionally, the substantially cylindrical portion 2 of the caulking device 1 is press-fitted into the tubular body portion 7 of the eyelet 5 having the flange-shaped expanded portion 6 at one end of the tubular body portion 7, A method of tearing a tubular body 7 and bending it with a head 2 of a caulking device 1 to form a caulked portion 8 and performing caulking processing has been performed.

However, according to this method, since the substantially cylindrical portion 3 of the caulking device 1 having a portion having a diameter slightly larger than the inner diameter of the tubular body portion 7 of the eyelet 5 is torn and forcibly formed, it is formed. There was a problem in that the shape of the caulking portion 8 varied in various shapes and was not constant.

[0005]

[Problems to be solved by the device]

 It is an object of the present invention to provide a crimping device which has almost the same shape of the crimped portion of the eyelet and can be made constant at any time.

[0006]

[Means for Solving the Problems]

 The present invention has been made in view of the above points, and is characterized by a caulking device having a head at one end of a substantially cylindrical portion and having a protrusion on the surface of the substantially cylindrical portion. In the caulking device, the protrusions are formed along the pillar of the cylinder and at substantially equal intervals with respect to the circumference.

[0007]

[Action]

 In a caulking device having a head at one end of a substantially cylindrical portion, protrusions formed along the cylinder are formed on the surface of the cylindrical portion at substantially equal intervals with respect to the circumference of the cylinder. When the cylindrical portion is press-fitted into the tubular body of the eyelet, the caulking portion is formed by sequentially tearing the eyelet at substantially equal intervals along the protrusion and bending the eyelet. Therefore, the crimped portions can be ensured to have substantially the same shape at any time.

Furthermore, if the height of the protruding portion of the protrusion on the surface of the substantially cylindrical portion becomes higher as it gets closer to the head, it is possible to more smoothly and sequentially tear the eyelets at even intervals. it can.

[0009]

【Example】

 Hereinafter, the present invention will be described with reference to the drawings of the embodiments. The present invention is not limited to these embodiments.

FIG. 1 is a sectional view of an embodiment just before caulking an eyelet by the caulking device of the present invention, and FIG. 2 is a plan view of an embodiment of the caulking device of the present invention. FIG. 3 is a perspective view of an eyelet that has been caulked by the caulking device of the present invention.

The caulking device 1 has a head 2 at one end of a columnar portion 3, and a protrusion 4 formed along the cylinder on the surface of the columnar portion 3. Six cylindrical portions 3 are provided at substantially equal intervals with respect to the circumference.

The shape of the head 2 of the caulking device 1 is not limited, and a circular shape, an elliptical shape, a square shape, or the like can be used. It is preferable that the substantially cylindrical portion 3 of the caulking device 1 be provided so as to stand substantially at the center of the head 2 so that the pressure is evenly applied, but it is not particularly limited, and it can be provided at any position. For example, when a plurality of substantially cylindrical portions 3 are provided, they can be erected on the head 2 so as to be opposed to other substantially cylindrical portions.

The shape of the substantially cylindrical portion 3 of the caulking device 1 includes a columnar shape, a conical shape, a truncated cone shape, and the like. When the substantially cylindrical portion 3 has a cylindrical shape, the height of the protruding portion of the protrusion 4 formed along the cylinder on the surface of the cylindrical portion 3 becomes gradually higher as it approaches the head 2. It is preferable that the cylindrical body portion 7 of the eyelet 5 can be torn smoothly by press-fitting the cylindrical portion 3 of the caulking device 1 in order. In the case where the substantially cylindrical portion 3 has a conical shape or a truncated cone shape, even if the height of the protrusion 4 is constant, the diameter of the substantially cylindrical portion 3 becomes larger as it approaches the head 2 in the truncated cone shape. As with the above, the tear of the eyelet 5 can be smoothly performed. It should be noted that the substantially cylindrical portion 3 may be provided in a shape obtained by combining these.

The protrusions 4 formed on the surface of the columnar portion 3 are not limited to the above-mentioned six protrusions as long as they are protrusions having substantially equal intervals with respect to the circumference of the cylinder. Any number can be provided.

As the material of the head 2, the substantially cylindrical portion 3, the protrusions 4 and the unevenness 5 of the caulking device 1, metal, particularly iron and its alloys, ceramics or the like, or a composite material thereof, or the like can be used.

In order to form the head 2 at one end of the substantially cylindrical portion 3, a method of drawing the head to provide a substantially cylindrical portion, and after forming a hole in the head, the substantially cylindrical shape in the hole is formed. It is possible to use a method of press-fitting the parts to integrate them, a method of forging a substantially cylindrical part to provide a head, and the like.

The caulking device of the present invention can be used not only as a normal caulking process, but also as a device useful for the eyelet method, which is a method of aligning wiring circuit patterns between inner layer materials when manufacturing a multilayer laminate. You can

[0018]

[Effects of the Invention] According to the present invention, it is possible to ensure that the shape of the crimped portion of the eyelet is almost the same and that it is constant at all times.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a caulking process according to an embodiment of a caulking device of the present invention.

FIG. 2 is a plan view showing an embodiment of the caulking device of the present invention.

FIG. 3 is a perspective view of an eyelet that has been caulked by the caulking device of the present invention.

FIG. 4 is a cross-sectional view showing caulking processing in an example of a conventional caulking device.

FIG. 5 is a perspective view of an eyelet that has been caulked by a caulking device of a conventional example.

[Explanation of symbols]

 1 Caulking device 2 Head 3 Substantially columnar part 4 Projection part 5 Eyelet 6 Flange-like expanded part 7 Cylindrical body part 8 Caulking part

Claims (2)

[Scope of utility model registration request] 1. A caulking device having a head at one end of a substantially columnar portion, wherein a protrusion is provided on the surface of the substantially columnar portion, the protrusion being along the column of the column and with respect to the circumference. A caulking device characterized by being formed at substantially equal intervals. 2. The caulking device according to claim 1, wherein the height of the protruding portion of the protrusion formed on the surface of the substantially columnar portion is gradually increased toward the head.