JPH06226376A - Method for fixing sheet material to screw material and fixing structure - Google Patents

Abstract

PURPOSE:To put a sheet material out of the way at the time of forming a male screw on a screw material and to make the fixing strength of the sheet material to the screw material large. CONSTITUTION:Male screw parts 13, 14 and a groove part 15 that is extended in the circumferential direction are provided on the outer circumference of the shaft-like part of a screw material 11 having the shaft-like part at least a part. After a sheet material 16 is deformed to form a conical surface 17, a hole 18 which is penetrated through the center part of this conical surface 17 is provided so that the circumferential surface 18a is parallel to the axial line of the conical surface 17. Then, the shaft part of the screw material 11 is inserted into the hole 18; the conical surface 17 is deformed into a planar shape with the circumferential part of the hole 18 positioned in the groove part 15; and by making the circumferential part of the hole 18 bite in the groove part 15, the screw material 11 is calked by the sheet material 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing method and a fixing structure for fixing a plate-shaped member to a screw member by fixing the plate-shaped member to the screw member by plastically deforming the plate-shaped member.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 1-145411 discloses a method shown in
Discloses a flanged bolt 1 and a method for manufacturing the bolt 1 as shown in FIG. FIG. 1 shows a bolt shaft 3a before a male screw is formed, and a convex ring 2 is integrally provided at an intermediate portion. The collar 4 to be fixed to the bolt shaft 3a is initially a flat disc shape having a small hole 5 in the center as shown in FIG. 2, but before being fixed to the bolt shaft 3a, It is plastically deformed to form a conical surface as shown in FIG. Next, as shown in FIG. 4, when the bolt shaft 3a is inserted into the small hole 5, the collar 4 is pressed to return to a flat state as shown by the dashed line in FIG. Bites into the outer peripheral surface of the bolt shaft 3a, and the collar 4 is fixed to the bolt shaft 3a. Thereafter, as shown in FIG. 5, a male screw 3b is formed on the bolt shaft 3a to complete the flanged bolt 1.

[0003]

In the conventional flanged bolt 1 and the method for manufacturing the bolt 1 described above, the male screw 3b is formed on the bolt shaft 3a after the collar 4 is fixed to the bolt shaft 3a. There was a problem that the collar 4 was an obstacle when forming the.

As shown in FIG. 3, when the small hole 5 is opened in a flat state of the collar 4 as shown in FIG. 2, the peripheral surface of the small hole 5 is parallel to the axis of the collar 4. When the collar 4 is conically curved, the peripheral surface of the small hole 5 is inclined with respect to the axis 4a of the collar 4 (the axis of the conical surface) as shown in the enlarged sectional view of FIG. As shown in FIGS. 4 and 5, when the collar 5 is returned to the flat state, the peripheral edge of the small hole 5 is less likely to bite into the bolt shaft 3a, so that the fixing strength of the collar 4 to the bolt shaft 3a is reduced. there were.

The present invention has been made in view of the above circumstances, and the plate-shaped member does not interfere with the formation of the male screw on the screw member, and the fixing strength of the plate-shaped member with respect to the screw member is improved. An object of the present invention is to provide a plate-like member fixing structure and a fixing method for a screw member that can be increased in size.

[0006]

A method of fixing a plate-shaped member to a screw member according to the present invention is provided with a shaft-shaped portion at least in part, and a male screw portion and a periphery of the shaft-shaped portion are provided on the outer periphery of the shaft-shaped portion. While preparing a screw material provided with a groove portion extending in the direction,
After deforming the plate material to form a conical surface on the plate material,
A hole penetrating the central portion of the conical surface is opened so that the peripheral surface of the hole is parallel to the axis of the conical surface, and then the shaft portion of the screw member is inserted into the hole. The screw member is caulked with the plate-shaped member by deforming the conical surface into a flat shape while the peripheral portion of the hole is aligned with the groove portion and causing the peripheral portion of the hole to bite into the groove portion. It is a thing.

Further, the fixing structure of the plate-like member to the screw member according to the present invention is provided with a shaft-like portion at least in part, and a male screw portion and a groove portion extending in the circumferential direction of the shaft-like portion are provided on the outer periphery of the shaft-like portion. A screw member provided with and a plate-shaped member,
After the plate material is deformed to form a conical surface,
A hole penetrating the central portion of the conical surface is opened so that the peripheral surface of the hole is parallel to the axis of the conical surface, and then the shaft portion of the screw member is inserted into the hole. By deforming the conical surface into a flat shape in a state where the peripheral portion of the hole is aligned with the groove portion, the peripheral portion of the hole bites into the groove portion and the screw member is caulked. is there.

[0008]

In the present invention, the male screw portion is formed in advance on the screw member before the plate member is fixed to the screw member, so that the plate member becomes an obstacle when forming the male screw on the screw member. Never.

Further, after the plate-shaped material is deformed to form a conical surface on the plate-shaped material, a hole is made in the plate-shaped material, so that the peripheral surface of the hole is easily aligned with the axis of the conical surface. They can be parallel to each other. When the peripheral surface of the hole is parallel to the axis of the conical surface in this manner, when the peripheral surface of the hole is bitten into the groove by deforming the conical surface into a flat surface, the peripheral edge of the hole with respect to the groove is formed. Since the biting of the portion becomes stronger, the fixing strength of the plate-shaped material with respect to the screw material can be increased.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings. 7 to 13 show an embodiment of the present invention. FIG. 7 shows the screw member 11 in the present embodiment, which has a shaft shape as a whole (note that the screw member in the present invention does not have a shaft shape as a whole as in the present embodiment. Only the part may have an axial shape). The screw member 11 is integrally provided with a collar-shaped portion 12 at its axially intermediate portion,
The brim 12 extends in a direction perpendicular to the axial direction of the screw material 11. A large-diameter male screw portion 13 is formed on the outer periphery of a portion of the screw member 11 on the one end side of the flange portion 12, while a large diameter male screw portion 13 is formed on the outer periphery of the portion of the screw member 11 on the other end side of the collar portion 12. A small diameter male screw portion 14 having a smaller diameter than the diameter male screw portion 13 is formed. A groove portion 15 is provided on the outer periphery of the portion of the screw member 11 between the flange portion 12 and the small diameter male screw portion 14 so as to extend around the circumference.

A plate-shaped material 1 to be fixed to the screw material 11.
8 is initially a flat disc shape as shown in FIG. 8, but is then drawn by a conventionally known press working method, so that a conical surface 17 is formed at the center thereof as shown in FIG.
Is formed. In the present specification, the “conical surface” includes not only a geometrically pure conical surface but also a shape such as, for example, a dome surface that has a functionally similar role. In addition, in this embodiment, the plate-shaped material 1
The plate-shaped material 1 so that only a part of 6 forms the conical surface 17.
Although 6 is deformed, the plate member 16 may be deformed so as to form the conical surface 17.

Next, as shown in FIG. 10, a hole 18 penetrating the central portion of the conical surface 17 in the axial direction of the conical surface 17 is opened by pressing or the like. Here, as shown in the enlarged cross-sectional view of FIG. 11, the peripheral surface 18a of the hole 18 is the conical surface 1
7 is parallel to the axis 17a.

FIG. 12 shows a press upper die 19 and a lower die 20 used for fixing the plate member 16 and the screw member 11. The press upper die 19 has a small-diameter male screw portion of the screw member 11. A mold cavity 21 for accommodating 14 is provided.
The lower surface 19a of the press upper die 19 is a horizontal surface. On the other hand, the lower press die 20 is provided with a die hole 22 for accommodating the large-diameter male screw portion 13 and the flange portion 12 of the screw material 11. The upper surface 20a of the lower press die 20 is a horizontal surface.

Next, as shown in FIG. 12, the screw member 11 is inserted into the hole 18 of the plate member 16, and the collar portion 12 is inserted into the plate member 16.
The lower part of the press 20 with the peripheral edge of the hole 18 aligned with the groove 15 by abutting against the hole 18 of
The large-diameter male screw portion 13 and the flange portion 12 of the screw member 11 are fitted into the mold hole 22 of so that the upper surface 20a of the lower press die 20 and the upper surface of the flange portion 12 are located on the same plane. After that, when the press upper die 19 is lowered, the plate-like material 16
Is sandwiched between the lower surface 19a of the upper press die 19 and the upper surface 20a of the lower press die 20, so that the conical surface 17 portion of the plate-shaped material 16 becomes flat as shown by the alternate long and short dash line in FIG. Will be returned. Then, at this time, the diameter of the hole 18 becomes smaller, and the peripheral edge portion of the hole 18 bites into the groove portion 15, so that the screw member 11 is caulked by the plate-shaped member 16 and the screw member 1
The plate-shaped member 16 is fixed with respect to 1.

According to such a fixing method and fixing structure, the screw member 1 is fixed before the plate member 16 is fixed to the screw member 11.
Since the male screw portions 13 and 14 are formed on the screw thread 1,
The plate-shaped member 16 does not become an obstacle when the male screw portions 13 and 14 are formed in 1.

Further, by deforming the plate-shaped material 16, the plate-shaped material 16
After the conical surface 17 is formed on the plate 18, a hole 18 is made in the plate member 16, so that the peripheral surface 18a of the hole 18 can be easily made parallel to the axis of the conical surface 17. When the peripheral surface 18a of the hole 18 is parallel to the axis 17a of the conical surface 17 as described above, when the conical surface 17 is returned to a flat shape and the peripheral edge portion of the hole 18 is cut into the groove portion 15,
Compared to the case where the peripheral surface 5a of the hole 5 is inclined as in the case of FIG. 6 of the related art, the biting of the peripheral portion of the hole 18 into the groove portion 15 becomes stronger, so that the plate-shaped material 16 with respect to the screw material 11
The fixing strength of can be increased.

[0017]

As described above, according to the present invention, the plate-shaped member does not interfere when forming the male screw on the screw member, and the fixing strength of the plate-shaped member with respect to the screw member can be increased. It is possible to obtain an excellent effect.

[Brief description of drawings]

FIG. 1 is a front view showing a bolt shaft in a conventional method for manufacturing a flanged bolt.

FIG. 2 is a cross-sectional view showing an initial state of a collar in the conventional method for manufacturing a collared bolt.

FIG. 3 is a cross-sectional view showing a state in which the flange is deformed to form a conical surface in the conventional method for manufacturing a flanged bolt.

FIG. 4 is a cross-sectional view showing a pressing operation for returning the collar to a flat state in the conventional method for manufacturing a flanged bolt.

FIG. 5 is a cross-sectional view showing a completed flanged bolt in the conventional method for manufacturing a collared bolt.

FIG. 6 is an enlarged cross-sectional view showing a peripheral portion of the small hole in FIG.

FIG. 7 is a front view showing a screw material according to an embodiment of a method and a structure for fixing a plate-shaped material to a screw material according to the present invention.

FIG. 8 is a front view showing the initial state of the plate-shaped material in the embodiment.

FIG. 9 is a cross-sectional view showing a state in which the plate member is deformed so as to form a conical surface.

FIG. 10 is a cross-sectional view showing a state in which holes are made in the plate-shaped member.

11 is an enlarged cross-sectional view showing a peripheral portion of a hole in FIG.

FIG. 12 is a cross-sectional view showing a pressing operation for returning the conical surface of the plate-shaped material to a flat shape.

FIG. 13 is a cross-sectional view showing a state in which the work of fixing the plate-shaped material to the screw material is completed in the embodiment.

[Explanation of symbols]

 11 screw material 13 large diameter male screw portion 14 small diameter male screw portion 15 groove portion 16 plate material 17 conical surface 17a axis of conical surface 18 hole 18a hole peripheral surface

Claims (2)

[Claims] 1. A screw material having a shaft-shaped portion at least in part, and provided with a male screw portion and a groove portion extending in the circumferential direction of the shaft-shaped portion on the outer periphery of the shaft-shaped portion, while a plate-shaped member is provided. After deforming the material to form a conical surface on the plate-shaped material,
A hole penetrating the central portion of the conical surface is opened so that the peripheral surface of the hole is parallel to the axis of the conical surface, and then the shaft portion of the screw member is inserted into the hole. The screw member is caulked with the plate-shaped member by deforming the conical surface into a flat shape while the peripheral portion of the hole is aligned with the groove portion and causing the peripheral portion of the hole to bite into the groove portion. A method for fixing a plate-shaped material to a screw material, which is characterized by the above. 2. A screw member having a shaft-shaped portion at least in part, and a male screw portion and a groove portion extending in the circumferential direction of the shaft-shaped portion provided on the outer periphery of the shaft-shaped portion, and a plate-shaped member. Comprising, after the plate-shaped material is deformed to form a conical surface,
A hole penetrating the central portion of the conical surface is opened so that the peripheral surface of the hole is parallel to the axis of the conical surface, and then the shaft portion of the screw member is inserted into the hole. By deforming the conical surface into a planar shape in a state where the peripheral portion of the hole is aligned with the groove portion, the peripheral portion of the hole is bited into the groove portion and the screw member is caulked. A plate-like material fixing structure for the characteristic screw material.