JP2000074035A - Washer with accompanying turn preventing function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washer with an accompanying turn preventing function capable of impeding rotation of the washer itself even in case of a tightened material of wood when a bolt or nut is tightened, or in addition, capable of tightening from one side in accordance with necessity of a head of the bolt and the nut, and capable of using the bolt on the market left as it is. SOLUTION: A pin-shaped metal fitting lock part 3 protruded from a peripheral one surface of an insertion hole 2 inserting a corresponding bolt 5 to have a distance from the center of the insertion hole 2 in a size abutting a side part to either peripheral plane part of a head 5a of the bolt 5 or a nut 6 screwed to the bolt 5, and a tightened material lock part 4 protruded from the other surface are provided. A surface protruding the tightened material lock part 4, in a direction into contact with structural members 8, 9 which are a tightened material, is placed in a condition interposed between itself and either of the head 5a of the corresponding bolt 5 or the nut 6 screwed to the bolt 5, and the bolt 5 is inserted in the insertion hole 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washer with a rotation preventing function, and more particularly to a bolt and a reinforcing member for reinforcing a joint between a building and a structural member such as a column and a beam or a beam and a girder in a wooden building or the like. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washer with a rotation prevention function for preventing rotation generated when a nut is tightened.

[0002]

2. Description of the Related Art Conventionally, there has been proposed a method for preventing a rotation which occurs at the time of tightening a bolt and a nut for reinforcing a connecting portion between building structural members in a wooden building, as shown in FIGS. A plurality of locking claws 5 from a corner
The flat washer 51 is formed by bending the two and 53 in opposite directions, and opening an oval bolt receiving port 54 in the center.
And a bolt having a neck whose cross section is elliptical in accordance with the bolt receiving port 54. FIG. 15 is a plan view showing a flat washer used in a device for preventing a screwed body for wood from being swiveled described in Japanese Utility Model Laid-Open No. 4-74714, and FIG. 16 is a cross-sectional view showing a cross section taken along line EE of FIG. is there.

According to the device for preventing a screwed body for wood from turning described in Japanese Utility Model Application Laid-Open No. 4-74714, the locking claw 5 is provided.
2 and 53 bite into the material to be tightened, and rotation of the flat washer 51 is prevented when the nut is tightened.
The oval bolt receiving port 54 and the oval neck of the bolt are connected to each other, so that the rotation of the bolt is prevented, and the tightening operation can be completed only by tightening the nut side. .

A washer that prevents only the washer itself from being swiveled has a bottom portion 62 as shown in FIGS.
There is a washer 61 with a co-rotation preventing protrusion formed with a plurality of protrusions 63. FIG. 17 is a rear view of a washer with co-rotation preventing protrusion described in Japanese Utility Model Laid-Open No. 4-80919, and FIG.
It is sectional drawing which shows the FF cross section of FIG.

The protrusion 63 is very small in comparison with the entire size of the washer 61 with the co-rotation preventing protrusion. However, according to the washer 61 with the co-rotation preventing protrusion, when the material to be tightened is a metal, Even if the small projections 63 bite into the material to be tightened, a sufficient frictional force can be obtained to prevent the washer itself from rotating, and the washer is locked to the material to be tightened.

[0006]

However, as described above, according to the apparatus for preventing a screwed body from being screwed for wood described in Japanese Utility Model Laid-Open No. 4-74714, it is necessary to prevent the bolt from being turned around. Bolt receiving port 54 of flat washer 51
The bolt had to be specially oval-shaped for the neck. Therefore, conventional bolts cannot be used, and the applicable range is narrow. Also, in wooden buildings, since structural members are made of wood and shrink by drying, bolting must be performed many times before the completion of construction work, but as the construction work progresses, the nut side, or In some cases, the bolt side was concealed by an outer wall or the like. In this case, according to the device for preventing the screwed body for wood screw from being twisted described in Japanese Utility Model Application Laid-Open No. 4-74714, only the bolt can be swung on the head side, so that the bolt can be tightened from one side only on the nut side. When the nut side is concealed, the bolt cannot be tightened.

According to the washer 61 with co-rotation preventing protrusion described in Japanese Utility Model Laid-Open No. 4-80919, when the material to be tightened is a tree, the small protrusion 63 only bites into the material to be tightened. In this case, it was not always possible to obtain a sufficient frictional force to prevent the washer itself from rotating.

Therefore, the present invention can prevent the washer itself from rotating even when the material to be tightened is a tree at the time of tightening the bolt or the nut. An object of the present invention is to provide a washer with a rotation preventing function that can be tightened from one side as required without being limited to the side and that can use a commercially available bolt as it is.

[0009]

According to a first aspect of the present invention, there is provided a washer with a rotation preventing function, wherein the washer projects from one surface around an insertion hole through which a corresponding bolt is inserted, and the distance from the center of the insertion hole is equal to that of the bolt. A pin-shaped metal fitting locking portion having a size such that a side portion is in contact with a peripheral flat surface portion of either a head or a nut to be screwed to the bolt, and a to-be-clamped material locking portion protruding from the other surface. Things.

[0010] Here, the metal fitting locking portion and the tightened material locking portion are:
It may be formed integrally with the washer, but may be attached to a normal washer. In addition, the shape of the metal fitting locking portion and the clamped material locking portion may be various shapes such as a cylindrical shape, a rod shape such as a polygonal column shape, a sharpened tip of these rod shapes, a conical shape, a polygonal pyramid shape, and the like. Shapes of various shapes are conceivable. Further, the numbers of the metal fitting locking portions and the tightened material locking portions provided on one washer are not particularly limited. In addition, various materials such as iron, stainless steel, brass, and aluminum can be considered as the material of the washer. Further, as the material to be tightened, building structural members such as columns and beams made of a material softer than metal such as wood can be considered. Further, the shape of the washer with the rotation preventing function is not particularly limited, such as a ring shape and the like, in addition to a flat plate shape made of a polygon such as a square.

Therefore, according to the washer with the anti-rotation function of the first aspect of the invention, the head of the bolt or the bolt corresponding to the surface on which the fastening portion of the fastening target material projects in contact with the fastening target material. If the bolt is inserted through the insertion hole while being interposed between any one of the nuts to be screwed to the bolt, the side of the metal fitting engaging portion comes into contact with the peripheral flat portion of either the head or the nut. In this way, the head or the nut whose side portion of the metal fitting is in contact with the surrounding flat portion cannot rotate with respect to the washer, and the material locking portion bites into the material to be tightened. The washer cannot rotate with respect to the material to be tightened. In particular, since the metal locking portion is pin-shaped, the head of the bolt or the nut screwed to the bolt is easily positioned until the side of the metal locking portion comes into contact with each peripheral flat surface portion.

According to a second aspect of the present invention, there is provided the washer with the anti-rotation function according to the first aspect of the present invention, wherein a plurality of metal locking portions are provided, and a positional relationship between the metal locking portions is the bolt. And the side portions of the metal fittings are simultaneously in contact with any one of a plurality of flat portions around the head or the nut screwed to the bolt.

Therefore, according to the washer with the anti-rotation function according to the second aspect of the present invention, in addition to the action of the washer with the anti-rotation function of the first aspect, the head or nut of the bolt prevents rotation with respect to the washer. Since the number of places to be performed increases in accordance with the number of metal fittings, the force with which the bolt head or the nut is prevented from rotating with respect to the washer is increased.

According to a third aspect of the present invention, there is provided the washer with the anti-rotation function according to any one of the first and second aspects, wherein the locking portion of the tightened member has a pin shape. The distance from the center of the insertion hole of the material to be fastened is such that the side of the material to be fastened comes into contact with a flat surface around either the head of the bolt or the nut screwed into the bolt. That is what it is.

Here, the positional relationship between the metal fitting locking portion and the tightened material locking portion may be such that it is continuous as it moves from one surface of the washer to the other surface, but it does not necessarily have to be continuous.

Therefore, according to the washer with the anti-rotation function according to the third aspect of the present invention, in addition to the action of the washer with the anti-rotation function according to any one of the first and second aspects, the metal fitting locking portion has a projection. If the bolt is inserted through the insertion hole in a state where the surface of the bolt is interposed between either the head of the corresponding bolt or the nut screwed to the bolt in the direction in contact with the material to be tightened, the head Alternatively, the head or the nut in which the side of the to-be-clamped material engaging portion is in contact with any peripheral flat portion of the nut and the side of the to-be-clamped material engaging portion is thus in contact with the peripheral flat portion Becomes incapable of rotating with respect to the washer, and the metal fitting locking portion cuts into the material to be tightened, so that the washer cannot rotate with respect to the material to be tightened.

According to a fourth aspect of the present invention, there is provided the washer with the anti-rotational function according to the third aspect of the present invention, wherein a plurality of locking portions are provided for the material to be tightened. Is such that the side portions of the fastening members are simultaneously in contact with any one of a plurality of planar portions around either the head of the bolt or the nut screwed to the bolt. It is.

Therefore, according to the washer with the anti-rotation function according to the invention of claim 4, in addition to the action of the washer with the anti-rotation function of claim 3, the surface on which the metal fitting locking portion projects is tightened. When the bolt is inserted into the insertion hole in a state of being interposed between the head of the corresponding bolt or the nut screwed to the bolt in a direction in contact with the attachment, the head of the bolt or the nut is positioned with respect to the washer. Since the number of locations where rotation is inhibited increases with the number of fastening members, the force with which the bolt head or nut is prevented from rotating with respect to the washer is increased.

According to a fifth aspect of the present invention, there is provided a washer with a rotation preventing function provided with a pin-shaped fastening portion for a material to be fastened protruding from one side.

Here, the to-be-clamped member locking portion may be formed integrally with the washer, but may be attached to a normal washer. In addition, the shape of the fastening member
Various shapes such as a rod shape such as a columnar shape and a polygonal column shape, a sharpened tip of the rod shape, a conical shape, a polygonal pyramid shape, and the like can be considered. Furthermore, the number of fastening members provided on one washer is not particularly limited. In addition, various materials such as iron, stainless steel, brass, and aluminum can be considered as the material of the washer. Also,
Examples of the material to be tightened include building structural members such as columns and beams made of a material softer than metal such as wood. Further, the shape of the washer with the rotation preventing function is not particularly limited, such as a ring shape and the like, in addition to a flat plate shape made of a polygon such as a square.

Therefore, according to the washer with a rotation preventing function according to the fifth aspect of the present invention, the head of the bolt or the bolt corresponding to the surface where the fastening portion of the fastening target material projects is in contact with the fastening target material. If the bolt is inserted through the insertion hole while being interposed between any of the nuts to be screwed to the bolt, the tightened portion of the tightened material bites into the tightened material and the washer with respect to the tightened material. Rotation becomes impossible.

[0022]

Embodiments of the present invention will be described below. FIG. 1 is a perspective view showing a washer with a rotation preventing function according to a first embodiment of the present invention, and FIG.
It is sectional drawing which shows A section.

As shown in FIGS. 1 and 2, the washer 1 with a rotation preventing function according to the present embodiment is a washer having a substantially square plate shape, and has an insertion hole 2 for inserting a bolt at the center. ing. On one surface around the insertion hole 2, two pin-shaped metal fitting locking portions 3 are vertically provided and protrude. The distance from the center of the insertion hole 2 of these metal fittings 3 to the head 5a of the bolt 5 described later or the nut 6 screwed to the bolt 5
The size is such that the side of each metal fitting locking portion 3 is in contact with any one of the peripheral flat portions.

The positional relationship between the two metal fittings 3 is such that they face each other with the insertion hole 2 interposed therebetween, and a plurality of bolts 5 are provided around the head 5a or the nut 6 of the bolt 5 described later. Of each of the opposing flat portions of the flat portions of
The relationship is such that the metal fittings 3 of the book come into contact with each other in order. In other words, the positional relationship between the metal fittings 3 is such that the metal fittings are fixed to any one of a plurality of flat portions around the head 5a of the bolt 5 or the nut 6 screwed to the bolt 5 described later. No. 3 is in contact at the same time.

On the other hand, a washer 1 with a rotation preventing function
On the other surface, two fastening members 4 are pin-shaped in the same positional relationship around the insertion hole 2 as in the case of the metal fitting locking portion 3, similarly to the metal fitting locking portion 3. Are protruding and protruding. Moreover, the metal fitting locking portion 3 and the tightened material locking portion 4
The position of the washer 1 with the rotation preventing function is continuous from one surface to the back surface. In other words, there is no distinction between the front and the back of the washer 1 with the anti-rotation function, and the fitting locking portion 3 and the to-be-clamped member locking portion 4 have target shapes on the front and the back of the washer 1 with the rotation prevention function. The metal fitting locking part 3 and the tightened material locking part 4
There is no distinction. In other words, washer 1 with anti-rotation function
If the two protruding pins on either side of the front and back are used as the metal fitting locking portions 3, the two protruding pins on the other surface will be the fastening members locking portions 4.

Next, a method of using the washer 1 with the rotation preventing function according to the present embodiment will be described. FIG. 3 is a perspective view showing a use state of the washer with a rotation preventing function according to the first embodiment of the present invention, and FIG. 4 is a cross-sectional view showing a BB section of FIG.

As shown in FIGS. 3 and 4, the washer 1 with the anti-rotational function according to the present embodiment includes a structural member 8 and a structural member, as in the case where a beam and a girder are joined in a wooden building structure. 9 are used for the bolt 5 and the nut 6 which reinforce the joint.

In this example, at the joint between the structural member 8 and the structural member 9, the nut 5 is screwed into the screw portion 5 c of the bolt 5 through which the stem 5 b is inserted from the structural member 8 toward the structural member 9. Is screwed.

The washer 1 with the anti-rotational function of this embodiment is used on the structural member 8 side, and the ordinary washer 7 is used on the structural member 9 side. That is, the washer 1 with the anti-rotation function is interposed between the head 5a of the bolt 5 and the structural member 8 to be tightened in a state where the stem 5b of the bolt 5 is inserted through the insertion hole 2. The washer 7 is
With the stem 5b of the bolt 5 inserted through the nut 6
And a structural member 9 to be tightened.

At this time, in the washer 1 with the anti-rotation function of the present embodiment, the surface on which the to-be-clamped material locking portion 4 protrudes comes into contact with the structural member 8 which is the to-be-clamped material, and the metal fitting locking portion. The surface on which 3 projects is in contact with the head 5a. In the washer 1 with the swiveling prevention function of the present embodiment, since there is no distinction between the metal fastener 3 and the fastening member 4, the pin provided on the surface in contact with the structural member 8 is tightened. The pin provided on the surface that is in contact with the head 5a is referred to as a metal engaging portion 3, and the metal engaging portion 3 is provided.

The fastening member 4 is fixed to the structural member 8.
And the washer 1 with the rotation preventing function is prevented from rotating with respect to the structural member 8. In addition, metal fittings 3
Is such that the side portion contacts the peripheral flat portion of the head 5a,
a is prevented from rotating with respect to the washer 1 with the rotation preventing function.

As a result, the head 5a of the bolt 5 can be locked non-rotatably with respect to the structural member 8 which is the material to be tightened, and is non-rotatably locked with respect to the structural member 9 which is the material to be tightened. The tightening operation can be completed only by tightening the nuts 6 that have not been tightened. Therefore, even when the head 5a of the bolt 5 cannot be tightened with a wrench, a spanner, or the like for some reason, such as being concealed by a wall, the washer 1 with the anti-rotational function according to the present embodiment must be mounted in advance. Thereby, the fastening operation can be performed any number of times. In particular, the head 5a of the bolt 5
It is easily positioned until the side of the metal fitting locking portion 3 comes into contact with the surrounding flat surface portion. For this reason, the washer 1 with the swiveling prevention function of the present embodiment has high work efficiency associated with the mounting, and can surely prevent the head 5a of the bolt 5 to be swung from being swung.

In the above description, the bolt 5 prevents rotation by the washer 1 with the anti-rotation function of the present embodiment, but the positions of the washer 1 with the anti-rotation function 1 and the washer 7 are switched. Alternatively, the nut that prevents rotation may be the nut 6. As described above, by changing the side on which rotation is prevented by the washer 1 with the rotation preventing function of the present embodiment to the nut 6, the tightening operation can be completed only by tightening the bolt 5 alone. In this case, when the nut 6 cannot be tightened with a wrench, a spanner, or the like for some reason, such as being hidden by a wall, the tightening operation can be performed many times by tightening only the head 5a of the bolt 5. .

In the above description, the number of the metal fittings 3 and the number of the material to be fastened 4 are two, but the number of the metal fittings 3 and the material to be fastened is not necessarily required. The number of 4 is not limited to two, but may be another number.

For example, in the washer 11 with the anti-rotation function shown in FIG. 5, the number of the metal stoppers 3 and the number of the fastening members 4 is three, and the washer 11 with the anti-rotation function shown in FIG. Washer 21
The number of the metal fittings 3 and the number of the fastening members 4 is six. FIG. 5 is a plan view or a rear view showing another example of the washer with a rotation preventing function according to the first embodiment of the present invention.
FIG. 6 is a plan view or a rear view showing still another example of the washer with a rotation preventing function according to the first embodiment of the present invention.

As described above, the washer 11 with the anti-rotational function, in which the number of the metal fitting locking portion 3 and the number of the fastening member locking portions 4 are different,
The washer 21 with the anti-rotation function also has substantially the same operation and effect as the washer 1 with the anti-rotation function 1 of the first embodiment.
In addition, any of the metal fittings 3 (or the material locking parts 4 to be tightened) provided on the washers 11 and 21 with the rotation preventing function has a positional relationship with the head 5 a of the bolt 5 or the bolt 5. In this relation, the side of each metal fitting locking portion 3 (or the material-to-be-clamped locking portion 4) simultaneously contacts any one of a plurality of planar portions around any of the nuts 6 to be screwed.

When the number of the metal latches 3 increases, the number of places where the head 5a of the bolt 5 or the nut 6 is prevented from rotating with respect to the washer increases in accordance with the number of the metal latches 3. The force by which the head 5a or the nut 6 of the bolt 5 is prevented from rotating with respect to the washer is increased. Therefore, the upper limit of the torque that can be tightened when only one of the head 5a and the nut 6 is tightened can be further increased.

Similarly, if the number of the fastening members 4 is increased,
Since the number of locations where the fastening members 4 bite into the fastening material increases according to the number of fastening members 4, the washer prevents rotation of the fastening material relative to the fastening material. The force applied is increased. Therefore, the upper limit of the torque that can be tightened when only one of the head 5a and the nut 6 is tightened can be further increased.

The number of the metal fittings 3 and the number of the fastening members 4 may be the same or different.

Furthermore, in the above description, the shapes of the tips of the metal fitting locking portion 3 and the fastening member locking portion 4 are not particularly limited, and various shapes can be assumed. For example, FIG.
As shown in FIG. 8, it may be flat, may be sharp as shown in FIG. 8, or may be curved as shown in FIG. FIG. 7 is an enlarged cross-sectional view showing a fitting locking portion and a tightened member locking portion of a washer with a rotation preventing function according to a first embodiment of the present invention, and FIG. FIG. 9 is an enlarged cross-sectional view showing another example of the fitting locking portion of the washer with the turning prevention function and the locking portion of the material to be tightened. FIG. 9 shows the first embodiment of the present invention. It is an expanded sectional view which shows another example of a part and a to-be-tightened material locking part. In addition, 1
Metal fittings 3 for two washers with anti-rotation function,
The shape of the fastening member 4 may be the same, but may be different. For example, the shapes of the distal ends of the metal fitting locking portion 3 and the material locking portion 4 are different as in the case where the metal fitting locking portion 3 in FIG. 7 is combined with the material locking portion 4 in FIG. It does not matter.

As a matter of course, combinations other than those shown in FIGS. 7 to 9 are also conceivable as the combination of the metal fitting locking portion 3 and the fastening member locking portion 4. That is, the shape of the metal fitting locking portion 3 and the tightened material locking portion 4 is not limited to a shape in which the tip is simply changed, but may be a columnar shape, a polygonal column shape, or the like if the overall shape is a pin shape. Various shapes such as a rod shape, a shape obtained by changing the shape of the tip of these rod shapes, a conical shape, a polygonal pyramid shape, and the like are possible, and are not particularly limited.

In the case where the shape of the tip end of the fastening member 4 is shown in FIG. 8 or when the whole fastening portion 4 is conical or polygonal pyramid, the fastening of the fastening member 4 is performed. The part 4 is easy to bite into the material to be tightened. Also, as shown in FIG. 9, when the shape of the tip of the fastening member 4 is a curved surface, it is felt that the fastening portion 4 of the fastening member 4 can easily bite into the fastening material. It is compatible with the software.

In addition, in the above description, the metal fitting locking portion 3,
The to-be-clamped member locking portion 4 is a washer 1, 1 with a rotation preventing function.
A body made separately from the main bodies 1 and 21 may be added later, or may be formed integrally with the whole washer 1 with the rotation preventing function.

Further, in the above description, various materials such as iron, stainless steel, brass, and aluminum can be considered as the material of the washers 1, 11, 21 with the anti-rotation function. It may be made of a material other than metal such as hard plastic.

Further, in the above description, the material to be tightened is not limited to the structural members 8 and 9, but may be a building structural member such as a column or a beam made of a material softer than a metal such as wood. Can be

In the above description, the shape of the washer 1, 11, 21 with the anti-rotational function is a polygon such as a square, but is not particularly limited to a flat shape, a ring shape or the like.

As described above, the washers 1, 11, 21 with the anti-rotation function according to the present embodiment project from one surface around the insertion hole 2 through which the corresponding bolt 5 is inserted, and the distance from the center of the insertion hole 2 is reduced. A pin-shaped fitting engaging portion 3 whose side portion is in contact with a flat surface around either the head 5a of the bolt 5 or the nut 6 screwed to the bolt 5, and a tightened portion protruding from the other surface. And a material locking portion 4.

Therefore, in the washer 1, 11, 21 with the anti-rotation function according to the present embodiment, the surface on which the locking member locking portion 4 protrudes comes into contact with the structural members 8, 9 which are the locking members. If the bolt 5 is inserted through the insertion hole 2 while being interposed between the head 5a of the bolt 5 corresponding to the direction and the nut 6 screwed to the bolt 5, the head 5
The head 5a or the nut 6 in which the side of the metal latch 3 is in contact with the peripheral flat portion of the nut 6 or the peripheral flat portion of the nut 6 in this manner. Become incapable of rotating with respect to the washer, and the to-be-fastened member locking portion 4 bites into the to-be-fastened structural members 8, 9 and the to-be-fastened structure member 8, 9 to be fastened. Since rotation is impossible, the head 5a of the bolt 5 or the bolt 5
Any one of the nuts 6 screwed to the head 5a can be non-rotatably locked to the structural members 8 and 9 which are members to be tightened.
Alternatively, the tightening operation can be completed only by tightening only the side of the nut 6 which is not locked non-rotatably with respect to the structural members 8 and 9 which are members to be tightened. Therefore, the head 5a of the bolt 5 is hidden for some reason, such as being concealed by a wall.
Alternatively, when any of the nuts 6 screwed to the bolt 5 cannot be tightened with a wrench, a wrench, or the like, the washer 1,11,21 with the anti-rotation function according to the present embodiment is provided on the concealed side. By mounting in advance, the tightening operation can be performed any number of times. In particular, since the bracket 3 is pin-shaped, the head 5a of the bolt 5 or the nut 6 screwed to the bolt 5 can be easily adjusted until the side of the bracket 3 comes into contact with each peripheral flat surface. , The work efficiency associated with the mounting is good, and the head 5a of the bolt 5 to be locked or the nut 6 screwed to the bolt 5 can be reliably prevented from rotating.

The washer 1, 11, 21 with the anti-rotation function of the present embodiment has a plurality of metal fittings 3, and the positional relationship between the metal fittings 3 is determined by the head 5a of the bolt 5 or the head 5a. The relationship is such that the side portions of the metal fitting locking portions 3 are simultaneously in contact with any one of a plurality of planar portions around any of the nuts 6 screwed to the bolts 5.

Therefore, in the washer 1, 11, 21 with the anti-rotation function of the present embodiment, the number of the metal locking portions 3 is such that the head 5 a of the bolt 5 or the nut 6 is prevented from rotating with respect to the washer. The head 5a of the bolt 5
Alternatively, since the force with which the nut 6 is prevented from rotating with respect to the washer is increased, the upper limit of the torque that can be tightened when only one of the head 5a and the nut 6 is tightened can be further increased.

Further, in the washer 1, 11, 21 with the anti-rotation function according to the present embodiment, the shape of the fastening member 4 is pin-like, and the insertion hole of the fastening member 4 is provided. (2) The distance from the center is such that the side of the to-be-tightened material locking portion 4 is in contact with the peripheral flat portion of either the head 5a of the bolt 5 or the nut 6 screwed to the bolt 5.

Accordingly, the washers 1, 11, 21 with the anti-rotation function of the present embodiment correspond to the direction in which the surface on which the metal fitting locking portion 3 protrudes comes into contact with the structural members 8, 9 which are members to be tightened. If the bolt 5 is inserted into the insertion hole in a state where the bolt 5 is interposed between the head 5a of the bolt 5 to be screwed and the nut 6 screwed to the bolt 5, either the head 5a or the nut 6 can be inserted. The head 5a or the nut 6 in which the side of the fastening member 4 is in contact with the surrounding flat portion and the side of the fastening member 4 is in contact with the surrounding flat portion as described above is the washer. On the other hand, it becomes impossible to rotate, and the metal fitting locking portion 3 bites into the structural members 8 and 9 which are members to be tightened, and the washer becomes impossible to rotate with respect to the structural members 8 and 9 which are members to be tightened. Surface on which any one of the metal fastener 3 and the fastening member 4 is formed The bolt 5 is inserted into the insertion hole in a state where the bolt 5 is interposed between the head 5a of the corresponding bolt 5 or the nut 6 screwed to the bolt 5 in a direction in contact with the structural members 8, 9 which are the members to be tightened. Even if it is inserted, the nut 5 screwed to the head 5a of the bolt 5 or the bolt 5
Can be non-rotatably locked to the structural members 8 and 9 which are the members to be tightened, and the head 5a or the nut 6 can be locked.
It is possible to complete the tightening work only by tightening only the side which is not locked non-rotatably with respect to the structural members 8 and 9 which are the members to be tightened. There is no convenience.

In addition, the washer 1, 11, 21 with the anti-rotation function according to the present embodiment has a plurality of locking members 4, and the positional relationship between the locking members 4 is as described above. The side surface of each of the fastening members 4 is simultaneously in contact with any one of the plurality of flat portions around the head 5a of the bolt 5 or the nut screwed to the bolt 5. is there.

Accordingly, the washer 1, 11, 21 with the anti-rotation function of the present embodiment corresponds to the direction in which the surface on which the metal fitting locking portion 3 protrudes comes into contact with the structural members 8, 9 which are members to be tightened. When the bolt 5 is inserted into the insertion hole in a state where the bolt 5 is inserted between the head 5a of the bolt 5 to be screwed and the nut 6 screwed to the bolt 5, the head 5a or the nut 6 of the bolt 5 The number of places where rotation is blocked by the bolts 5
The force with which the head 5a or the nut 6 is prevented from rotating with respect to the washer is increased, so that the upper limit of the torque that can be tightened when only one of the head 5a or the nut 6 is tightened can be further increased.

By the way, in the above description, the positional relationship between the metal fitting locking portion 3 and the to-be-clamped material locking portion 4 may be such that the positional relationship continues from one side of the washer to the other side.
They need not necessarily be continuous.

In the above description, the position of the to-be-tightened material locking portion 4 is, as in the case of the metal fitting locking portion 3, the distance from the center of the insertion hole 2 to the head 5 a of the bolt 5 or the bolt 5. The position of the fastening member 4 is such that the side of the fastening member 4 is in contact with one of the peripheral flat surfaces of the nut 6 screwed into the nut 5. However, the position is not necessarily limited to such a position.

Next, a second embodiment of the present invention will be described. FIG. 10 is a plan view showing a washer with a rotation preventing function according to a second embodiment of the present invention, and FIG.
It is sectional drawing which shows C cross section. In the figure, the same reference numerals and symbols as those in the first embodiment denote the same or corresponding parts as in the first embodiment.

As shown in FIGS. 10 and 11, the washer 31 with the anti-rotational function of the present embodiment is different from the washer 1 with the anti-rotational function 1 of the first embodiment in that the fastening member 4 has
Is changed to a position away from the insertion hole 2. Therefore, the metal fitting locking part 3 and the tightened material locking part 4 are
Instead of one continuous member, it is made individually.

As described above, when the position of the fastening member 4 is changed, the fastening member 4 will not be replaced by the metal fitting 3, but the other points will be described. The same effects as those of the washer 1, 11 and 21 with the anti-rotation function of the first embodiment can be obtained.

As a matter of course, also in the washer 31 with the anti-rotation function of the present embodiment, the metal fitting locking portion 3,
The number of the fastening members 4 is not particularly limited, and the shapes of the metal fittings 3 and the fastening members 4 are not particularly limited.

Next, a third embodiment of the present invention will be described. FIG. 12 is a perspective view showing a washer with a rotation preventing function according to a third embodiment of the present invention, and FIG.
It is sectional drawing which shows D cross section. In the figure, the same reference numerals and symbols as those in the above embodiments are the same as or equivalent to those in the first embodiment.

As shown in FIGS. 12 and 13, the washer 41 with the anti-rotation function of the present embodiment is the same as the washer 1 with the anti-rotation function of each of the above-described embodiments, except that the metal fitting locking portion 3 is removed. is there. In addition, the distance of the to-be-tightened material locking part 4 from the insertion hole 2 is not specifically limited.

That is, the washer 41 with a rotation preventing function according to the present embodiment is provided with the pin-shaped fastening member locking portion 4 protruding from one side.

The washer 41 with the function of preventing rotation according to the present embodiment.
According to this, as shown in FIG. 14, the surface on which the material-to-be-clamped locking portion 4 protrudes is interposed between the corresponding bolt head 5a in the direction in which the material comes into contact with the structural member 8 to be material-to-be-clamped. When the bolt is inserted through the insertion hole in the state of being tightened, the fastening member locking portion 4 bites into the fastening material and the washer cannot rotate with respect to the fastening material. FIG. 14 is a perspective view showing a use state of a washer with a rotation preventing function according to a third embodiment of the present invention.

The position where the washer 41 with the anti-rotation function according to the present embodiment is interposed is the structural member 8 which is a material to be tightened.
It is not limited between the bolt and the head 5a of the bolt, but may be interposed between the structural member 9 and the nut screwed to the bolt.

The washer 41 with the anti-rotational function according to the present embodiment is provided on one of the front and back surfaces with the fastening member locking portion 4.
However, since nothing is provided on the other surface as in the case of the normal washer, the appearance during use has no difference from the normal washer. That is, the washer 41 with the rotation preventing function of the present embodiment can be used as a decorative washer. Moreover, since it is possible to prevent entrainment at the time of tightening, there is no need to pay attention to the rotation angle of the washer,
Tightening work becomes extremely easy.

Therefore, according to the washer 41 with the anti-rotation function of the present embodiment, the surface on which the to-be-clamped member locking portion 4 protrudes is in a direction in which it comes into contact with the structural members 8 and 9 as the to-be-clamped material. If the bolt is inserted through the insertion hole 2 in a state where the bolt is inserted between the corresponding bolt head 5a and the nut that is screwed to the bolt, the tightened member locking portion 4 becomes When the washer bites into the structural members 8 and 9 and cannot be rotated with respect to the structural members 8 and 9 that are the members to be tightened, it is necessary to fix the washer as a decorative washer at a predetermined position in the same direction. Without having to pay attention to the angle of rotation of the washer,
The work of tightening the bolt head 5a or the nut screwed to the bolt can be easily completed.

In each of the above embodiments, both the metal fastener 3 and the fastening member 4 are pin-shaped, but the fastening material 4 is not necessarily limited to the pin shape. Not something. For example, for the fastening member 4 for fastening
Any shape may be used as long as the washer has a structure such as being formed by bending a corner portion of the washer so that the washer bites into the material to be tightened and is prevented from rotating.

Further, in each of the above embodiments, the shape of each periphery of the head 5a and the nut of the bolt to be applied may be hexagonal, but is not particularly limited as long as it is polygonal. That is, the head 5a of the bolt to be applied
The shape around each of the nut and the nut may be a polygon other than a hexagon, such as a pentagon or an octagon.

[0070]

As described above, the washer with the anti-rotation function according to the first aspect of the present invention is a bolt with a corresponding bolt in a direction in which the surface on which the member-to-be-clamped engaging portion projects is in contact with the member to be clamped. If the bolt is inserted into the insertion hole in a state where the bolt is inserted between the head and the nut that is screwed to the bolt, the side of the metal fitting locking portion to the peripheral flat portion of either the head or the nut. The head or the nut, in which the side of the metal fitting locking portion is in contact with the peripheral flat surface portion in this way, cannot rotate with respect to the washer, and the material locking portion is tightened. Since the washer bites into the material and becomes unrotatable with respect to the material to be tightened, either the head of the bolt or a nut screwed to the bolt can be non-rotatably locked with respect to the material to be tightened. Non-rotatable with respect to the tightened material of the head or the nut You can complete the work tightened with only tighten the only side that has not been sealed. Therefore, even if it becomes impossible to tighten any of the bolt head or the nut screwed to the bolt with a wrench, a spanner, or the like for some reason, such as being concealed by a wall, the concealed side is provided by the present invention. By mounting the washer with the rotation preventing function in advance, the tightening operation can be performed any number of times. In particular, since the bracket engaging portion is pin-shaped, the head of the bolt or the nut to be screwed to the bolt is easily positioned until the side of the bracket engaging portion comes into contact with each peripheral flat portion, The work efficiency accompanying the mounting is good, and the rotation of the head of the bolt to be locked or the nut screwed to the bolt can be reliably prevented.

The washer with the anti-rotational function according to the second aspect of the present invention has the effect that the head of the bolt or the nut is prevented from rotating with respect to the washer in addition to the effect of the washer with the anti-rotational function of the first aspect. It increases according to the number of metal fittings, and the force that prevents the head or nut of the bolt from rotating with respect to the washer is increased, so that tightening is possible when only one side of the head or the nut is tightened. The upper limit of the torque can be further increased.

According to a third aspect of the present invention, in addition to the effect of the first or second aspect of the washer with the anti-rotation function, the surface of the metal fitting locking portion protrudes. If the bolt is inserted through the insertion hole in a state of being interposed between the head of the corresponding bolt or the nut screwed to the bolt in a direction in contact with the material to be tightened, the head or the nut The head or the nut in which the side portion of the fastening member is in contact with one of the surrounding flat portions and the side portion of the fastening portion is in contact with the surrounding flat portion in this manner, with respect to the washer. And the washer cannot be rotated with respect to the material to be fastened, so that either the metal fastener or the material to be fastened The head of the corresponding bolt with the formed surface in contact with the material to be tightened Alternatively, even if the bolt is inserted through the insertion hole in a state of being interposed between any of the nuts to be screwed to the bolt, either the head of the bolt or the nut to be screwed to the bolt is to be tightened. Can be locked in a non-rotatable manner, and only by tightening only the side of the head or the nut that is not locked in a non-rotatable manner with respect to the material to be tightened. It is easy to use because it is not necessary to worry about the direction of the front and back.

According to the fourth aspect of the present invention, in addition to the effect of the third aspect of the washer with the anti-rotational function, the surface on which the metal locking portion projects is in contact with the material to be tightened. When the bolt is inserted into the insertion hole in a state of being interposed between the head of the bolt corresponding to the orientation or the nut screwed to the bolt, the bolt head or the nut is prevented from rotating with respect to the washer. Is increased in accordance with the number of the fastening members, and the force with which the bolt head or the nut is prevented from rotating with respect to the washer is increased. Therefore, only one side of the head or the nut is used. , The upper limit of the torque that can be tightened can be further increased.

According to a fifth aspect of the present invention, there is provided a washer with a rotation preventing function, wherein the surface on which the member to be fastened is projected is screwed to the head of the corresponding bolt or the bolt in a direction in contact with the material to be fastened. If the bolt is inserted through the insertion hole while being interposed between any of the nuts to be tightened, the fastening member of the tightened member bites into the tightened material and the washer cannot rotate with respect to the tightened material. Therefore, even when it is necessary to fix the washer as a decorative washer at a predetermined position, there is no need to pay attention to the rotation angle of the washer, and tighten the head of the bolt or the nut screwed to the bolt. Work can be completed easily.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a washer with a rotation preventing function according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing an AA section in FIG. 1;

FIG. 3 is a perspective view showing a use state of the washer with a rotation preventing function according to the first embodiment of the present invention.

FIG. 4 is a sectional view showing a BB section of FIG. 3;

FIG. 5 is a plan view or a rear view showing another example of the washer with a rotation preventing function according to the first embodiment of the present invention.

FIG. 6 is a plan view or a rear view showing still another example of the washer with a rotation preventing function according to the first embodiment of the present invention.

FIG. 7 is an enlarged cross-sectional view showing a metal fitting locking portion and a tightened material locking portion of the washer with the anti-rotation function according to the first embodiment of the present invention.

FIG. 8 is an enlarged cross-sectional view showing another example of the metal fitting locking portion and the tightened material locking portion of the washer with the rotation preventing function according to the first embodiment of the present invention.

FIG. 9 is an enlarged cross-sectional view showing still another example of the metal fitting locking portion and the tightened material locking portion of the washer with the rotation preventing function according to the first embodiment of the present invention.

FIG. 10 is a plan view showing a washer with a rotation preventing function according to a second embodiment of the present invention.

FIG. 11 is a sectional view showing a section taken along line CC of FIG. 10;

FIG. 12 is a perspective view showing a washer with a rotation preventing function according to a third embodiment of the present invention.

FIG. 13 is a sectional view showing a DD section of FIG. 12;

FIG. 14 is a perspective view showing a use state of a washer with a rotation preventing function according to a third embodiment of the present invention.

FIG. 15 is a plan view showing a flat washer used in the device for preventing the screwed body for wood from turning around described in Japanese Utility Model Laid-Open No. 4-74714.

FIG. 16 is a cross-sectional view showing an EE cross section of FIG. 15;

FIG. 17 is a rear view of a washer with co-rotation preventing protrusion described in Japanese Utility Model Laid-Open No. 4-80919.

18 is a cross-sectional view showing a cross section taken along line FF of FIG. 17;

[Explanation of symbols]

 1, 11, 21, 31, 41 Washer with anti-rotation function 2 Insertion hole 3 Metal fittings 4 Threaded material locking part 5 Bolt 5 a Head 5 b Stem 5 c Screw 6 Nut 7 Washer 8, 9 Structural member 51 Flat washer 52, 53 Locking claw 54 Bolt receiving port 61 Washer with co-rotation prevention protrusion 62 Bottom portion 63 Projection

Claims (5)

[Claims] 1. A side protruding part from a peripheral surface of an insertion hole through which a corresponding bolt is inserted and having a distance from the center of the insertion hole to a peripheral flat part of either a head of the bolt or a nut screwed into the bolt. A pin-shaped metal fitting locking portion having a size to contact with, and a to-be-clamped material locking portion protruding from the other surface. 2. The method according to claim 1, wherein a plurality of the metal locking portions are provided, and a positional relationship between the metal locking portions is any one of a plurality of planar portions around a head of the bolt or a nut screwed into the bolt. 2. The washer with a rotation preventing function according to claim 1, wherein the side portions of the crab locking portions are in contact with each other at the same time. 3. The fastening member locking portion has a pin-like shape, and a distance from the center of the insertion hole is set to a flat peripheral portion of either a head of the bolt or a nut screwed to the bolt. The washer with a rotation preventing function according to claim 1, wherein the washer has a size to be in contact with the side portion. 4. A plurality of the fastening members are provided, and a positional relationship between the fastening members is a plurality of portions around either a head of the bolt or a nut screwed to the bolt. The washer with a rotation-preventing function according to claim 3, wherein the side portions of the fastening members are in contact with any one of the flat portions at the same time. 5. A washer with a rotation preventing function, comprising a pin-shaped fastening member engaging portion protruding from one side.