JPH10311323A - Washer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of parts and simplify a production process by providing a flat washer shape main part having the center hole for a bolt insertion and a spring washer part cuttingly raised its one part. SOLUTION: A washer 10 is constituted by a flat washer shape main part 11 having the center hole 6 for a bolt insertion and a spring washer 12 formed by raising this one part cuttingly and it is favorable that its material is a spring steel and it is hardened after being formed to a prescribed shape. The washer part 12 formes the main part 11 by pressing and also a concentric circle shape slit S is inserted to the periphery edge of the center hole 6 and raised up. When the washer 10 is interposed between a bolt 3 head inserted in a through column 1 and the column 1 and the bolt 3 is tightened between a plate 5 and the column 1, the bolt 3 head is directly contacted to the washer part 12. Therefore, even if the column 1 or beam 2 is shrunk by drying, the generation of a clearance between the column 1 and beam 2 and the loosening of the bolt 3 can be prevented by the elastic force of the washer part 12. Therefore, the washer can be formed integrally by one part and the number of parts can be reduced and the production process can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washer which prevents loosening of a fastening portion when a pillar or the like of a building dries and shrinks.

[0002]

2. Description of the Related Art Generally, pillars and the like of a building shrink by drying, loosening occurs at a portion connecting the pillars, and there is a possibility that the strength of the building body is reduced. For example, as shown in FIG. 4, bolts 3, etc. are provided at a portion where a through pillar 1 erected on a base and a girder 2, a joist hanging or the like abut against each other.
A washer 4 or a plate 5 is used.

As shown in FIG. 5, the washer 4 used here is a pawl extending from an inner peripheral edge of a central hole 6 for bolt insertion of the flat washer 4a and a spring washer 4b as shown in FIG. The flat washer 4a and the spring washer 4
The one obtained by caulking b with two parts into one part is used. This is because it is inconvenient to handle two parts at the time of working at a high place, and to simplify the work as one part.

[0004] When the bolt 3 inserted into the wood such as the base, the beam, the column, etc. is tightened through such a washer 4, the elastic force of the spring washer 4 b causes the wood to contract even if the wood shrinks due to drying over time. This contraction can be absorbed to prevent loosening of the bolt 3 and generation of a gap between the columns.

[0005]

However, even when the washer 4 has good workability, it is difficult to manufacture the washer 4 when manufacturing it.
Requires two parts, flat washer 4a and spring washer 4b,
In addition, a crimping operation is required, which is disadvantageous in manufacturing cost.

In addition, the pawl 7 extending from the flat washer 4a
However, since the spring washes into the spring washer 4b, the elastic force of the spring washer 2 is reduced. In particular, since the pawl 7 projects above the spring washer 4b, when the bolt 3 is tightened, the head of the bolt 3 hits the pawl 7,
There is a problem that the elastic force of the spring washer 4b cannot be fully utilized.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and aims to reduce the number of parts and simplify the manufacturing process to reduce the weight and the manufacturing cost, and to sufficiently increase the elastic force of the spring washer. It is to provide a washer that can be used.

[0008]

SUMMARY OF THE INVENTION To achieve the above object, the present invention according to claim 1 is a washer interposed when a connecting member and a connected member are fastened by bolts. It is characterized by having a flat washer-shaped main part having a central hole for passage, and a spring washer formed by cutting and raising a part of the flat washer-shaped main part.

In this way, the spring washer portion is raised from the flat washer-shaped main portion, the entire washer is made into one part, and the crimping work is not required. Therefore, it is possible to achieve a reduction in weight and a reduction in manufacturing cost. it can.

Further, when wood is tightened by bolts through the washer, the head of the bolt directly hits the spring washer, so that even if the wood shrinks due to drying over time or the like. In addition, the elastic force of the spring washer can be sufficiently exerted, and loosening of the bolt and generation of a gap between the columns can be prevented.

In the present invention according to claim 2, the spring washer is formed by cutting and raising a part of the periphery of the center hole of the flat washer-shaped main portion by forming a slit concentrically with the center hole. It is characterized in that it is formed and its tip is sharp.

In this way, when the washer is cut out and formed by a laser beam or the like, the center hole and the spring washer can be continuously and collectively formed, and the operation becomes extremely simple. If the tip is configured to be sharp, even if vibrations are transmitted to the bolt,
The tip bites into the bolt and exerts the function of preventing the bolt from loosening.

According to a third aspect of the present invention, the flat washer-shaped main portion has a detent means for engaging with the connecting member or the connected member at the time of tightening to prevent the washer from rotating. And

With this arrangement, even if vibrations or the like are transmitted when the bolt is tightened, the rotation preventing means prevents the washer from rotating, so that the bolt itself does not loosen.

According to a fourth aspect of the present invention, the spring washer is cut and raised in a 1/4 to 1/3 arc shape.

In this case, not only the formation of the spring washer portion is facilitated, but also the elastic force can be sufficiently exerted, and furthermore, it is possible to stack and convey at the time of conveyance.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A washer according to an embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view of a washer according to an embodiment of the present invention, and FIG.
FIG. 3 is a cross-sectional view taken along the line 2 and FIG. 3 is a cross-sectional view showing the used state of the washer. Members common to those shown in FIGS. 4 and 5 are denoted by the same reference numerals.

As shown in FIGS. 1 and 2, the washer 10 of the present embodiment is used for bolt-connecting a through column 1 as a connecting member and a spar 2 as a connected member connected to the through column 1. A flat washer-shaped main part 11 having a center hole 6 for bolt insertion, and a flat washer-shaped main part 11
And a spring washer 12 formed by cutting and raising a part of the spring washer.

As a material of the washer 10, it is preferable to use spring steel, but it is not limited to this, and a similar material can be appropriately selected and used according to the application. However, the spring steel used here needs to be quenched after forming into a predetermined shape.

The spring washer portion 12 can be formed by forming the flat washer-shaped main portion 11 by pressing and by inserting a slit S concentric with the center hole 6 at the periphery of the center hole 6. Although it is possible to form such a spring washer portion 12, not only a press but also various methods can be considered.

For example, there is a method of cutting out with a laser beam. In this case, first, a center hole 6 is opened at a predetermined position of the spring steel by a laser beam, and the center hole 6 is formed.
An arc-shaped slit S is also formed by the laser beam, continuing from the portion. Then, when the portion surrounded by the arc-shaped slit S is started up by pressurizing means (not shown, a hydraulic cylinder such as hydraulic or pneumatic is preferably used), the spring washer 12 Can be formed.

Alternatively, after the center hole 6 alone is stamped and formed by a press, the spring washer 12 may be formed by a laser beam, and the spring washer 12 may be raised by pressurizing means.

In any case, if these methods are used, the operation of forming the washer 10 for receiving the pillar can be performed extremely easily.

Further, when the spring washer 12 is formed by forming a slit S by a laser beam,
It is preferable that the tip 12a is formed so as to be a sharp end, that is, an edge is standing. With this configuration, even if vibration or the like is transmitted to the bolt 3 after the bolt 3 (see FIG. 3) is tightened, the tip 12a can prevent the bolt 3 from loosening. .

The washer 10 may be provided with a detent means 13 so that the washer 10 does not rotate even if vibrations or the like are transmitted to the bolt 3, so that the bolt 3 itself is not loosened.

As the detent means 13 (collectively 13a and 13b to be described later), one or a plurality of notches 13a may be formed on the outer peripheral end surface of the flat washer-shaped main part 11, as shown in FIG. , And as shown in FIGS.
One or a plurality of projections 13b may be provided on the side of the spring washer opposite to the spring washer, and this projection 13b may be engaged with the column 1 or the like at the time of tightening.

In the case of the notch 13a, when the bolt 3 is tightened, the column receiving washer 10 bites into the column 1 so that the column receiving washer 10 exerts a detent function, and the projection 13
In the case of b, when the bolt 3 is tightened, the bolt 3 directly bites into the column 1 and exerts an action of preventing the column receiving washer 10 from rotating.

The notch 13a and the projection 13b may be formed independently, but it is needless to say that both may be formed together in some cases.

It is preferable that the spring washer portion 12 is cut and raised in a １ ／ to ３ arc shape of the center hole 6 of the flat washer-shaped main portion 11. Flat washer-shaped main part 11 having a relatively large thickness t
When the portion surrounded by the arc-shaped slit S formed in the above is raised by the pressing means, if it is about 1/4 to 1/3 arc-shaped, the base end portion of the spring washer portion 12 is bent at the time of molding. The spring washer 12 does not break or break, and exhibits excellent bending elasticity after molding. Even if the wood or the like dries and shrinks with the lapse of time, the shrinkage can be sufficiently absorbed.

Next, the operation will be described. As shown in FIG. 3, the washer 10 according to the present embodiment is interposed between the column 3 and the head 3 a of the bolt 3 inserted into the through hole 1 a formed in the column 1. When the head 3a of the bolt 3 is rotated and fastened to the plate 5 (see FIG. 4), the contact between the through column 1 and the spar 2 is performed without any gap.

That is, since the head 3a of the bolt 3 directly contacts the spring washer 12, even if the column 1 or the spar 2 contracts due to drying or the like due to aging, the elastic force of the spring washer 12 acts. In addition, it is possible to prevent the occurrence of a gap between the column 1 and the spar 2 and the loosening of the bolt 3.

The tip 12a of the spring washer 12
Is a sharp end, so that even if vibrations or the like are transmitted to the bolt 3, the tip 12a bites into the head 3a of the bolt 3, so that the bolt 3 does not rotate, and the flat washer-shaped main portion 11 Is also provided with a detent means 13 which engages with the column 1 or the like.
0 does not rotate with respect to the pillar 1 and bites firmly, so that even if vibrations are transmitted, the washer 10 and the bolt 3
Of the bolt is prevented, and the bolt is not loosened.

However, when the amount of contraction of the column 1 or the like due to aging changes exceeds the range that the spring washer 12 can absorb, the bolts 3 may be retightened.

Further, since the washer 10 has a flat washer-shaped main portion 11 and a spring washer portion 12 integrally formed, for example, when working at a high place, the washer 10 is
It can be handled as one part, and its workability is very good.

In addition, the washer 10 constructed as described above
The flat washer-shaped main portion 11 is flat and the spring washer
Are cut and raised from here into a 1/4 to 1/3 arc shape of the center hole 6, so that the spring washer portion 12 and the void formed by forming the spring washer portion fit with each other, so that a large number of Since the stacking space can be reduced, it is convenient for transportation.

Further, at the time of manufacturing, the flat washer-shaped main portion 11, the spring washer portion 12, and the center hole 6 can be integrally formed by pressing at a time, so that the weight can be reduced and the manufacturing process can be simplified. And the manufacturing cost can be reduced.

The present invention is not limited to the above-described embodiment, but can be variously modified within the scope of the claims. For example, in the above-described embodiment, the spring washer 12 is formed by cutting and raising the periphery of the center hole 6 formed in the flat washer-shaped main portion 11 concentrically with the center hole 6. However, the present invention is not limited thereto, and the spring washer portion 12 may be formed at any portion between the inner peripheral edge and the outer peripheral edge of the center hole 6 of the flat washer-shaped main portion 11. Spring washers 12
Not only that, a plurality may be formed.
A / 3 arc shape is preferred, but it goes without saying that it may be more or less.

Further, in the above embodiment, the through column 1 is used as the connecting member, and the spar 2 is used as the connected member. However, the present invention is not limited to this, and various connecting members and the connected member may be used. It goes without saying that it can be used for:

[0039]

As described above, according to the first aspect of the present invention, since the spring washer is cut and raised on a part of the flat washer-shaped main portion, it can be integrally formed with one part. By reducing the number of parts and simplifying the manufacturing process, the weight and manufacturing cost can be reduced, and when the connecting member and the connected member column are tightened via the washer, the bolt head becomes the spring washer portion. Therefore, the elastic force of the spring washer can be sufficiently exerted, and the bolt can be prevented from loosening.

According to the second aspect of the present invention, when the washer is cut out and formed, the center hole and the spring washer can be formed at one time, so that the operation is extremely simple, and the tip of the spring washer is formed in a simple manner. If you configure it to be a sharp end,
Even if vibrations or the like are transmitted to the bolt, the tip bites into the bolt and exerts a function of preventing the bolt from loosening.

According to the third aspect of the present invention, since the flat washer-shaped main portion has the detent means, even if vibration or the like is transmitted after the bolt is tightened, rotation of the washer is prevented, and the bolt itself is tightened. There is no loosening.

According to the fourth aspect of the present invention, since the spring washer is cut and raised in a 1/4 to 1/3 arc shape, not only the formation is easy, but also the elastic force can be sufficiently exerted, and furthermore, the transfer is achieved. Sometimes stacking and transporting is also possible.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a sectional view showing a use state of the washer according to the embodiment.

FIG. 4 is a cross-sectional view illustrating an example of a connecting portion between a column and a beam.

FIG. 5 is a sectional view of a conventional washer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Column (connection member), 2 ... Beam (connected member), 3 ... Bolt, 6 ... Center hole, 10 ... Washer for column receiving, 11 ... Flat washer-shaped main part, 12 ... Spring washer part, 12a ... Spring Washer tip, S ... Slit.

Claims (4)

[Claims] A washer interposed when tightening a connecting member (1) and a connected member (2) with a bolt (3), wherein the flat washer having a center hole (6) for inserting a bolt. Department (11)
And a spring washer (12) formed by cutting and raising a part of the flat washer-shaped main part (11). 2. The spring washer portion (12) is configured to move a part of the periphery of a center hole (6) of the flat washer-shaped main portion (11) into the center hole.
2. The washer according to claim 1, wherein the washer is formed by cutting and raising a slit (S) concentrically with (6), and the tip (12a) has a sharp end. 3. The flat washer-shaped main part (11) has a detent means (13) which engages with the connecting member or the connected member at the time of tightening to prevent the washer from rotating. The washer according to claim 1. 4. The spring washer portion (12) has a width of 1/4 to
The washer according to any one of claims 1 to 3, wherein the washer is cut and raised in a 1/3 arc shape.