JPH06300029A - Washer - Google Patents

Abstract

PURPOSE:To prevent a rust prevention coating layer for coating the wall surface of a male screw inserting hole provided in a fastened member for inserting the male screw like a bolt, from breakage caused by rubbing of the male screw. CONSTITUTION:While a washer 1 is provided in the planar part 1a with a hole 1b, a rising-up 1c part rises from the planar part 1a on the peripheral edge of the hole 1b. By inserting the rising-up part 1c into a male screw inserting hole 3a of a fastened member 3, the rising-up part 1c is interposed between the male screw 2 and the male screw inserting hole 3a of the fastened member 3, so that a rust prevention coating layer such as painting, plating, etc., formed on the wall surface of the male screw inserting hole 3a can be prevented from breakage caused by the rubbing of the male screw 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washer inserted in a fastening portion.

[0002]

2. Description of the Related Art As shown in FIG. 1, a conventional ordinary washer 1 has a planar shape as a whole.

[0003]

Therefore, the anticorrosion coating layer (not shown) such as a coating film or plating provided on the wall surface of the male screw insertion hole 3a penetrating the member to be fastened 3 has a male screw 2 such as a bolt. There is a problem that the rust-preventive coating layer is destroyed by rubbing against the rust, and rust is generated from the destroyed portion of the rust-preventing coating layer, which corrodes the fastened member 3.

The present invention has been made in view of the above circumstances, and prevents the rust preventive coating layer covering the wall surface of the male screw insertion hole of the member to be fastened from being broken by being rubbed by the male screw. The purpose is to provide a washer that can.

[0005]

A washer according to the present invention comprises a flat portion, a hole provided in the flat portion, and a rising portion raised from the flat portion at the periphery of the hole. I have.

[0006]

When the rising portion is inserted into the male screw insertion hole of the member to be fastened, the rising portion is interposed between the male screw and the male screw insertion hole, so that it is provided on the wall surface of the male screw insertion hole. Further, it is possible to prevent the rust preventive coating layer such as a coating film or plating from being rubbed by the male screw and being destroyed.

If the hole of the washer has a non-circular shape, the rising portion also rises in a non-circular shape, so that the washer can be prevented from rotating with respect to the member to be fastened. It is possible to prevent the washer itself from breaking with respect to the fastening member and destroying the rust preventive coating layer provided on the surface of the fastened member.

Further, after the rising portion is inserted into the male screw insertion hole of the member to be fastened, the leading end side of the rising portion is plastically deformed so that the rising portion and the flat portion form the male screw insertion hole of the member to be fastened. By sandwiching the peripheral portion, the washer can be attached to the member to be fastened in advance before the fastening work, and the fastening work can be facilitated.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings. 2 to 4 show a first embodiment of a washer 1 according to the present invention. In the present embodiment, the washer 1 has a disk-shaped flat portion 1a, a square hole 1b provided at the center of the flat portion 1a, and flat surfaces raised on four sides of the hole 1b. It has four rising portions 1c integrated with the shape portion 1a.

5 to 8 show an example of a state in which the washer 1 is used. The fastened member 3 in this example is a pipe member 4
Is a metal fitting that is attached to the pipe member 4, and has an annular portion 3b that is bent into a substantially annular shape and a pair of arm portions 3c that linearly extend outward from both ends of the annular portion 3b. . When the external force is not applied, the pair of arms 3c are opened slightly outward from the parallel state as shown by the alternate long and short dash line in FIG. Each of the arm portions 3c is provided with a bolt insertion hole 3a which is a rectangular elongated hole extending parallel to the arm portion 3c.
The member 3 to be fastened is coated on the entire surface including the wall surface of the bolt insertion hole 3a for rust prevention and the like.

A bolt 2 is inserted through the bolt insertion hole 3a, and a nut 5 is screwed into the bolt 2. Between the head 2a of the bolt 2 and the outer surface of the one arm 3c, and between the nut 5 and the outer surface of the other arm 3c, a washer 1 was inserted through the bolt 2 into the hole 1b. It is installed in the state. Here, as shown in FIGS. 6 to 8, the rising portion 1c of each washer 1 is fitted into the bolt insertion hole 3a.

As a result, since the rising portion 1c is interposed between the bolt 2 and the wall surface of the bolt insertion hole 3a of the member 3 to be fastened, the coating film formed on the wall surface of the bolt insertion hole 3a is removed. It is possible to prevent the coating film from being broken by being rubbed by the bolt 2 and causing rust from the broken portion of the coating film.

In this embodiment, since the hole 1b of the washer 1 has a quadrangular shape and the rising portion 1c rises so as to form a quadrangular shape, the washer 1 with respect to the member 3 to be fastened. Is stopped. Therefore, when the nut 5 or the bolt 2 is rotated for fastening, the washer 1 also rotates with respect to the fastened member 3, and the washer 1 itself destroys the coating film formed on the surface of the fastened member 3. Can be prevented.

9 and 10 show a second embodiment of the present invention. In this embodiment, the rising portion 1c is made higher than in the first embodiment. The other construction of the washer 1 itself is the same as that of the first embodiment, but in this embodiment, the rising portion 1c is formed in the bolt insertion hole 3a of the member 3 to be fastened.
, The tip end side of the rising portion 1c is plastically deformed, and the portion of the member 3 to be fastened around the bolt insertion hole 3a is sandwiched between the tip end side of the rising portion 1c and the planar portion 1a. ing. Thus, the washer 1 can be attached to the member 3 to be fastened in advance before the fastening work to facilitate the fastening work. The washer 1 can be fixed to the fastened member 3 by strongly pinching the fastened member 3 at the rising portion 1c, and if it is weakly fastened, the washer 1 can be fitted along the bolt insertion hole 3a.
Can be movable.

11 and 12 show a third embodiment of the present invention. In this embodiment, the rising portion 1c is formed into a cylindrical shape by burring. Also in this embodiment, by using as in the first embodiment, the coating film formed on the wall surface of the bolt insertion hole 3a is rubbed by the bolt 2 and the coating film is destroyed. It is possible to prevent rust from being generated from the destroyed part of the. However, in this embodiment, the effect of preventing the washer 1 from rotating with respect to the member to be fastened 3 cannot be obtained.

[0016]

As described above, in the washer according to the present invention, the rust preventive coating layer covering the wall surface of the male screw insertion hole provided in the member to be fastened for inserting the male screw such as the bolt is rubbed against the male screw. It is possible to obtain an excellent effect that it can be prevented from being destroyed by.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a conventional washer in use.

FIG. 2 is a front view showing a first embodiment of a washer according to the present invention.

FIG. 3 is a side view showing the first embodiment.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a front view showing an example of a usage state of the first embodiment.

6 is a cross-sectional view taken along line VI-VI in FIG.

7 is a cross-sectional view taken along the line VII-VII of FIG.

FIG. 8 is a front view showing a state in which the rising portion of the washer is fitted in the bolt insertion hole of the member to be fastened in the first embodiment.

FIG. 9 is a sectional view showing a second embodiment of a washer according to the present invention.

FIG. 10 is a sectional view showing an example of a usage state of the second embodiment.

FIG. 11 is a front view showing a third embodiment of a washer according to the present invention.

12 is a sectional view taken along line XII-XII in FIG.

[Explanation of symbols]

 1 Washer 1a Planar part 1b Hole 1c Standing part

Claims (2)

[Claims] 1. A washer having a flat portion, a hole provided in the flat portion, and a rising portion raised from the flat portion at a peripheral edge of the hole. 2. The hole has a non-circular shape.
The washer described.