JP7002051B2 - Mounting tool with retaining washer - Google Patents

Description

The present invention relates to a fitting with a washer for preventing the insertion member from coming off.

Conventionally, washers for preventing a fastening member such as a screw from coming off are known. For example, in Patent Document 1, a first surface, a second surface on the opposite side of the first surface, a circular outer circumference, and a circular shaft hole inside the circular shaft hole penetrating from the first surface to the second surface. And a retaining washer having a plurality of slits radially extending from the shaft hole to the outer peripheral side are disclosed. The retaining washer is used when fastening the housing body and the panel via the fastening member.

Japanese Unexamined Patent Publication No. 2012-47240

The retaining washer disclosed in Patent Document 1 has a plurality of slits, so that it has excellent flexibility and enters the groove between the threads of the fastening member. Therefore, the head of the panel or the fastening member is grasped and moved upward. Even if it is pulled up, it is possible to prevent the fastening member from coming off and the fastening state from being released. However, since the retaining washer is thin and relatively thin, it is difficult for the operator to grasp it during the installation work, and especially when wearing thick gloves, the fingertips during the work. I sometimes slipped off.

An object of the present invention is to provide a fitting with a retaining washer that can quickly perform a fastening operation without holding the retaining washer during work.

In order to solve the above problems, the object of the present invention is to have a retaining washer having a circumferential direction and a vertical direction, including a mounting body in which a washer is arranged, and an insertion hole through which a fastening member is inserted. It is a fixture of.

The mounting tool with a retaining washer according to the present invention has a shaft hole that communicates with the insertion hole in the mounting body and a flexible region that can be deformed in the vertical direction, and is arranged in the mounting body. It is characterized in that it is arranged in a rotatable state together with a shaft portion of an insertion member penetrated through the shaft hole in a space.

In one of the embodiments of the mounting tool with a retaining washer according to the present invention, the mounting body is formed with a slit extending in the circumferential direction, and the washer is arranged from the slit in the placement space. be able to.

In one of the embodiments of the fitting with a retaining washer according to the present invention, the arrangement space is formed between the first inner wall and the second inner wall which face each other in the vertical direction and have an opening in the center. The retaining washer is arranged in contact with the inner surfaces of the first and second inner walls.

In one of the embodiments of the mounting tool with a retaining washer according to the present invention, the outer peripheral dimension of the slit is 40 to 60% of the outer peripheral dimension of the mounting body.

In one of the embodiments of the mounting tool with a retaining washer according to the present invention, the head of the fastening member and the first end surface of the mounting tool are on the same plane as each other in a state of being fastened by the fastening member. Located in.

According to the mounting tool with a retaining washer according to the present invention, since the retaining washer is arranged in the mounting body in a swivel state together with the shaft portion of the fastening member, the tightening of the fastening member is hindered. The omission is prevented without any problem. Further, since the retaining washer is stably arranged in the mounting main body, the retaining washer can be smoothly mounted without falling off from the operator's fingertip during the mounting work.

The drawings show a particular embodiment of a fitting with a retaining washer according to the invention, which includes not only the configurations essential to the invention, but also embodiments that can be selectively implemented and preferred embodiments.
The figure which shows the use state of the attachment with the retaining washer. Perspective view of the fixture. An exploded perspective view of the fixture. (A) Cross-sectional view taken along the line IV (a) -IV (a) of FIG. (B) A partially enlarged view of the region surrounded by the alternate long and short dash line IV (b) in FIG. (A) A perspective view of a retaining washer. (B) Side view of the retaining washer. (A) FIG. 2 is a cross-sectional view taken along the line VI (a) -VI (a) of FIG. (B) FIG. 2 is a cross-sectional view taken along the line VI (b) -VI (b) of FIG. (A) Partially broken perspective view of the mounting body showing how the fastening member is inserted into the mounting tool (b) Partially broken perspective view of the mounting tool in the fastened state.

The details of the fixture 10 with the retaining washer according to the present invention will be described with reference to the attached drawings.

Referring to FIGS. 1 to 4, the mounting tool 10 with a retaining washer (hereinafter referred to as a mounting tool) 10 is used for an object 1 such as a flat handle or a locking device, and in the illustrated example, the mounting tool 10 is used. The object 1 has a housing body 2 and a panel 3, and the housing body 2 and the panel 3 are fixed to each other by a screw 5 (fastening member) via a fixture 10. Specifically, a plurality of protrusions 2a having a screw groove 4 are located on the back surface of the housing body 2, and the mounting tool 10 is formed on the protrusion 2a with the protrusions 2a penetrating the mounting holes 3a of the panel 3. It is adhered, and the screw 5 enters the screw groove 4 via the fixture 10 and is screwed.

The fixture 10 has a circumferential direction R and a vertical direction (or vertical direction) Y that intersect each other, a hollow cylindrical mounting body 20, and a retaining washer 30 arranged in the mounting body 20.

The mounting body 20 is made of a hard material, for example, a hard plastic material such as metal, ABS resin, polyacetal resin, or polycarbonate resin, and is opposite to the first end surface 21 in the vertical direction Y. It has a second end surface 22 located on the side and a peripheral surface portion 23 extending in the circumferential direction between the first and second end surfaces 21 and 22.

The mounting body 20 has an insertion portion 25 extending in the vertical direction Y from the first end surface 21 to the second end surface 22 so as to be located at the center thereof and penetrate the inside. The insertion portion 25 has a bottomed first opening 25a located on the first end surface 21 side and a second opening 25b located on the second end surface 22 side. The peripheral surface portion 23 of the mounting body 20 is provided with a slit 40 extending in the circumferential direction R.

Referring to FIG. 4A, inside the mounting body 20, the second end surface 22 is opposed to the first inner wall 28a, which is the bottom of the first opening 25a, and the first inner wall 28a in the vertical direction Y. The second inner wall (support wall) 28b located on the side is located. The second inner wall 28b is located on the side of the first end surface 21 with respect to the horizontal center line Q that bisects the dimension of the mounting body 20 in the vertical direction Y. At the center of the first inner wall 28a and the second inner wall 28b, openings 25c and 25d of the same shape and size are formed, respectively, and the first opening 25a of the first end surface 21 and the opening 25c of the first inner wall 28a, respectively. The opening 25d of the second inner wall 28b and the second opening 25b of the second end surface 22 communicate with each other in the vertical direction Y to form an insertion portion 25 penetrating the mounting body 20. The diameter dimension of the second opening 25b is substantially the same as or slightly larger than the diameter dimension of the first opening 25a, and the diameter dimension of the opening 25c of the first inner wall 28a and the diameter dimension of the opening 25d of the second inner wall 28b are substantially the same. Therefore, their diameter dimensions are smaller than the diameter dimensions of the first and second openings 25a and 25b.

The slit 40 extends in the circumferential direction R between the first inner wall 28a and the second inner wall 28b of the peripheral surface portion 23, and the arrangement space S formed between the first inner wall 28a and the second inner wall 28b. A thin circular plate-shaped retaining washer 30 is arranged in the wall. The retaining washer 30 can be formed of a flexible soft material such as a thin metal plate, a plastic material such as a thermoplastic synthetic resin, urethane, rubber, sponge, felt or the like.

Referring to FIGS. 5A and 5B, the retaining washer 30 has a first surface 31, a second surface 32 located on the opposite side of the first surface 31, a circular outer peripheral surface 33, and an outer peripheral surface. It includes a circular shaft hole 34 that is inside the surface 33 in the radial direction and penetrates from the first surface 31 to the second surface 32, and a plurality of slits 35 that radially extend from the shaft hole 34 to the outer peripheral surface 33 side. .. A circular terminal hole 36 is located at the terminal 35a located on the outer peripheral surface 33 side of the slit 35.

A plurality of substantially fan-shaped regions extending in the radial direction from the shaft hole 34 toward the outer peripheral surface 33 and lining up in the circumferential direction, which are located between the slits 35 extending radially, are formed from the first surface 31 side to the second surface 32. It is a flexible region that can be deformed to the side, that is, can be deformed in the thickness direction (vertical direction Y of the fixture) of the retaining washer 30. Further, around the shaft hole 34, an inclined portion 37 that inclines so as to gradually reduce the diameter from the first surface 31 to the second surface 32 is located. By forming the terminal hole 36, the retaining washer 30 has a smaller circumferential separation dimension, which is the base end of deformation, as compared with the case where the terminal hole 36 is not formed, so that the flexible region is flexible (springy). ) Can be increased.

Referring to FIGS. 4 (b), 5 (a), (b) and 6 (a), (b), the diameter D1 of the shaft hole 34 is formed by the thread portion 6a of the shaft portion 6 of the screw 5. It is made smaller than at least the inner diameter D3 of the outer diameter D2 and the inner diameter D3 of the shaft portion 6 formed by the screw valley portion 6b. Since the retaining washer 30 and the screw 5 have a dimensional relationship with each other, when the shaft portion 6 of the screw 5 is inserted into the shaft hole 34 of the retaining washer 30, each flexible region of the retaining washer 30 becomes the second surface 32. It bends toward and deforms, and in particular, when it exceeds the screw thread portion 6a, the amount of change becomes large. Further, since the inclined portion 37 is formed around the shaft hole 34 so that its diameter becomes smaller along the insertion direction, the shaft portion 6 is inserted from the first surface 31 toward the second surface 32. At that time, the retaining washer 30 is easily bent and easily inserted. After the screw 5 is screwed into the screw groove 4 of the protrusion 2a to fasten the housing body 2 and the panel 3, the head portion 5a of the screw 5 is pulled in the retracting direction opposite to the insertion direction, or the panel 3 is pulled. When a force such as pulling is applied to the shaft portion 6 in the vertical direction Y so as to disengage from the retaining washer 30, the opening edge portion of the shaft hole 34 is caught by the screw thread portion 6a, making it difficult to pull out. ..

The retaining washer 30 can be made to enter from the slit 40 into the arrangement space S formed between the first inner wall 28a and the second inner wall 28b. Specifically, since the retaining washer 30 is made of a flexible material, a part of the retaining washer 30 is inserted into the slit 40, and the retaining washer 30 is deformed and accommodated in the arrangement space S. Can be made to. As described above, since the retaining washer 30 can be inserted into the arrangement space S by pushing it through the slit 40 without using a tool or the like, the assembling operation is easy.

Since the retaining washer 30 is interposed between the first inner wall 28a and the second inner wall 28b in the vertical direction Y and is arranged in contact with them, it is stable in the arrangement space S. It is arranged and does not shift significantly. Further, since a part of the retaining washer 30 is not fixed in the arrangement space S by an adhesive means, a welding means, or the like, the washer 30 can freely rotate together with the shaft portion 6 of the screw 5. Therefore, the retaining washer 30 does not prevent the shaft portion 6 of the screw 5 from moving while being screwed into the screw groove 4 of the protrusion 2a of the housing body 2 in the arrangement space S, and the screw 5 moves in the retracting direction. It can be said that it can be prevented from slipping out.

Referring to FIG. 6A, the outer peripheral dimension L2 of the slit 40 in the circumferential direction R is preferably 40 to 55% of the outer peripheral dimension L1 of the mounting body 20. When the outer peripheral dimension L2 is less than 40% of the outer peripheral dimension L1, the retaining washer 30 cannot be inserted into the arrangement space S by pushing it through the slit 40. On the other hand, when the outer peripheral dimension L2 exceeds 55% of the outer peripheral dimension L1, the strength of the mounting body 20 becomes relatively low, and a part of the mounting body 20 is damaged during the mounting work and / or when subjected to an external impact. There is a risk of doing so.

Referring to FIGS. 7A and 7B, when mounting the panel 3 on the housing body 2, first, the protrusion 2a of the housing body 2 is passed through the mounting hole 3a of the panel 3 and mounted on the protrusion 2a. Cover with the ingredient 10. The tip of the shaft portion 6 of the screw 5 is inserted into the first opening 25a from the first end surface 21 side of the fixture 10, and the screw 5 is rotated by a tool such as a screwdriver to move the screw 5 downward. By screwing the shaft portion 6 of the screw 5 into the screw groove 4 of the protrusion 2a, the housing body 2 and the panel 3 are stably fixed. Since the screw 5 is prevented from being pulled out in the retracting direction opposite to the insertion direction by the retaining washer 30, the screw 5 is displaced upward and the screw is released even if the housing body 2 receives an external impact or the like. There is no danger of being done.

In this way, when the panel 3 is attached to the housing body 2, the protrusion 2a penetrated through the mounting hole 3a of the panel 3 is simply covered with the mounting tool 10 to which the retaining washer 30 is attached in advance to prevent the panel 3 from coming off. Since the screw 5 can be passed through the shaft hole 34 in a state where the washer 30 is stably arranged, the thin plate piece-shaped retaining washer 30 is not directly handled at the work site, and the retaining washer 30 can be removed from the fingertip. It will not fall or be irritated by the operator because it cannot be picked up properly.

With reference to FIGS. 2 and 6B, the screw 5 is inserted into the insertion portion 25 of the fixture 10 and mounted with the head 5a of the screw 5 in a state where the housing body 2 and the panel 3 are fastened. The first end surface 21 of the main body 20 is in a substantially flush state so as to be located on the same plane as each other. Since the entire screw 5 is located in the mounting body 20 and the head 5a of the screw 5 does not protrude from the first end surface 21, it has a neat appearance and the head 5a is caught and pulled out in the retracting direction. Can be suppressed.

The fixture 10 can also be used to attach the flat handle or locking device to the door. In such a case, the worker standing in front of the door will perform the mounting work without directly visually recognizing it on the back side of the door, so that the fingertips cannot be directly visually recognized. Although it becomes more difficult to grip the washer 30 and the like, by using the mounting tool 10 in which the retaining washer 30 is preliminarily incorporated, the mounting work can be smoothly performed without dropping the retaining washer 30.

Although not shown, in addition to the present embodiment, the screw 5 is provided in the internal arrangement space S without providing the slit 40 in the peripheral surface portion 23 of the mounting body 20, that is, in a state where the peripheral surface portion 23 is completely closed. It is also possible to arrange the retaining washer 30 so as to be able to turn together with the shaft portion 6. In such a case, the mounting body 20 is formed of two members that are separate from the first portion having the first inner wall 28a and the second portion having the second inner wall 28b, and the second inner wall 28b of the second portion is formed. A retaining washer 30 is placed on the top, and the first portion is covered from above, and the outer peripheral wall of the first portion and the outer peripheral wall of the second portion are fixed to each other by various known means such as an adhesive means and a welding means. Can form the fixture 10.

5 Fastening member (screw)
6 Shaft of fastening member 10 Mounting tool with retaining washer (mounting tool)
28a 1st inner wall 28b 2nd inner wall 30 retaining washer 40 slit L1 outer peripheral dimension of slit L2 outer peripheral dimension of mounting body R circumferential direction S placement space Y vertical direction

Claims (5)

In a mounting tool with a retaining washer that has a circumferential direction and a vertical direction and includes a mounting body in which a washer is arranged and an insertion hole through which a fastening member is inserted.
The retaining washer has a shaft hole that communicates with the insertion hole in the mounting body and a flexible region that can be deformed in the vertical direction, and penetrates the shaft hole in the arrangement space in the mounting body. The mounting tool, characterized in that it is arranged in a rotatable state together with a shaft portion of the inserted insertion member. The mounting tool according to claim 1, wherein the mounting body is formed with a slit extending in the circumferential direction, and the washer can be arranged from the slit in the placement space. The arrangement space is formed between the first inner wall and the second inner wall which face each other in the vertical direction and have an opening in the center, and the retaining washer is provided on the inner surface of the first and second inner walls. The attachment according to claim 1 or 2, which is arranged in contact with each other. The mounting tool according to claim 2, wherein the outer peripheral dimension of the slit is 40 to 55% of the outer peripheral dimension of the mounting body. The mounting tool according to any one of claims 1 to 3, wherein the head of the fastening member and the first end surface of the mounting body are located on the same plane in a state of being fastened by the fastening member.

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