JP5862806B2 - Bolt detent and bolt detent assembly method - Google Patents

Description

The present invention relates to a detent for a bolted bolt and a method for assembling the detent.

As a conventional anti-rotation of a screwed hexagon bolt, there is a double tongue washer provided with two tongue-shaped overhanging portions on the outer peripheral portion as described in Patent Document 1. One tongue is bent according to the object to be fastened so that the washer with both tongues does not rotate, and then the hexagon bolt is tightened. Then, the other tongue is bent so as to be along one of the six planes constituting the hexagonal section of the hexagonal bolt head. As a result, even if the hexagon bolt is loosened and rotates, the tongue along the plane does not rotate, so that the hexagon bolt can be prevented from rotating.

Japanese Utility Model Publication No. 61-128413 (Fig. 2)

However, the above-described detent of the screwed hexagon bolt has the tongue bent along the plane of the hexagon bolt. For this reason, a small gap is generated between the flat surface and the tongue due to the spring back of the bent portion, and the hexagon bolt may turn slightly.

The present invention has been made to solve such a problem, and an object of the present invention is to obtain a bolt detent and a method for assembling the bolt detent that can prevent the minute rotation of the bolt and can be easily assembled.

In the bolt detent according to the present invention, the bolt is provided with a head at the end of the shaft portion, and the outer peripheral surface of the head is provided with a plane parallel to the axial direction of the shaft portion. The washer sandwiched between the fastening member and the fastening member is screwed in a state where it protrudes in the radial direction of the shaft portion from between the head and the fastening member. The bolt detents fixed in step 1 are made of an elastic plate-like material having a first hole for inserting a screw, forming a second hole having a size that allows the head to be inserted, and abutting against a flat surface The first hole is provided at a position opposite to the edge with respect to the second hole at a predetermined distance from the edge , and the first hole and the second hole When the intermediate portion with the hole is brought into contact with the outer peripheral portion of the washer, and between the first hole and the intermediate portion is elastically deformed in a convex shape toward the fastening member In a state of being elastically deformed in a concave shape against washer between the monitor intermediate portion and the edge portion, in which the second hole is formed in a size to open a gap between the head and the intermediate portion .

In the bolt detent assembly method according to the present invention, the bolt is provided with a head at the end of the shaft portion, and the outer peripheral surface of the head is provided with a plane parallel to the axial direction of the shaft portion. Screwed in a state where the washer sandwiched between the head part and the fastened member protrudes in the radial direction of the shaft part from between the head and the fastened member, and then fastened after coming into contact with the flat surface A method for assembling a bolt detent made of an elastic plate material fixed to a member with a screw, the step of inserting the head into a second hole provided in the detent of the bolt, and forming a second hole A step of abutting a straight edge to the plane and a screw through a first hole provided at a predetermined distance from the edge at a position opposite the edge with respect to the second hole Then, it is fixed along the fastened member, and the intermediate part between the first hole and the second hole is brought into contact with the outer peripheral part of the washer, The step of elastically deforming between the hole of 1 and the intermediate portion in a convex shape toward the member to be fastened and elastically deforming between the intermediate portion and the edge portion in a concave shape with respect to the washer and pressing the edge portion against a flat surface And.

According to the present invention, a head is provided at the end of the shaft portion of the bolt, and a plane parallel to the axial direction of the shaft portion is provided on the outer peripheral surface of the head. Then, a washer is sandwiched between the head and the fastened member, and the bolt is screwed in a state where the washer protrudes from between the head and the fastened member in the radial direction of the shaft portion. A bolt detent is assembled to the bolt and the fastening member in this state. First, the head is inserted into the second hole of the bolt detent, and the linear edge forming the second hole is brought into contact with the plane. Next, a screw is inserted into the first hole of the bolt detent to fix the bolt detent to the fastening member.

Thereby, the intermediate part of the 1st hole and the 2nd hole is in contact with the perimeter part of a washer. That is, the bolt detent made of an elastic plate-like material moves away from the fastened member as it goes from the first hole portion toward the intermediate portion, and comes into contact with the outer peripheral portion of the washer at the intermediate portion. From the first hole portion to the intermediate portion, it is elastically deformed in a convex shape toward the fastened member. Further, from the intermediate portion to the edge portion, the edge portion is separated from the washer in a state where the edge portion is pressed against a flat surface. And from this intermediate part to the edge, it is elastically deformed in a concave shape with respect to the washer. The first hole is provided at a position opposite to the edge with respect to the second hole at a predetermined distance from the edge so that it can be assembled in this way.

In this way, since the straight edge of the bolt detent is pressed against the plane of the head of the bolt, the minute rotation of the bolt can be prevented. Further, the head is inserted into the second hole of the bolt detent, the edge is brought into contact with a flat surface, the screw is inserted into the first hole, and the bolt detent is fixed to the tightened member. The detent can be easily assembled.

According to the present invention, it is possible to obtain a bolt detent that can prevent a minute rotation of the bolt. Further, it is possible to easily assemble a bolt detent that can prevent a minute rotation of the bolt.

It is a whole block diagram of a bolt detent showing Embodiment 1 of the present invention. It is a figure which shows the cross section of a bolt detent | locking by arrow AA shown in FIG. It is a figure which shows the state in the middle of the assembly | attachment of the bolt detent | locking in Embodiment 1 of this invention. It is a whole block diagram of the bolt detent | locking which shows Embodiment 2 of this invention. It is a whole block diagram of the bolt detent | locking which shows Embodiment 3 of this invention.

Embodiment 1 FIG.
An embodiment of the present invention will be described with reference to FIGS. 1 is an overall configuration diagram of a bolt detent showing Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view of the bolt detent in the direction of arrow AA shown in FIG. 1, and FIG. 3 is an embodiment of the present invention. It is a figure which shows the state in the middle of the assembly | attachment of the bolt detent | locking in 1. FIG.

1 and 2, a flat block 1 as a member to be fastened is provided with a plane 1a, and a hole 1b penetrating the block 1 at a right angle to the plane 1a is formed. On the flat surface 1a, a washer 5 having a disc shape and having a circular through hole 5a at the center is overlaid. And the block 1 and the washer 5 are arrange | positioned so that these holes 1b and the holes 5a may penetrate. A flat block 2 is provided so as to overlap the opposite side of the flat surface 1 a of the block 1. The block 2 is provided with a screw hole 2a, and the block 2 and the block 1 are arranged so that the screw hole 2a penetrates the hole 1b and the hole 5a.

The bolt 3 is provided with a threaded portion 3b on a round bar-shaped shaft portion 3a. A head 3c is provided at the end of the shaft 3a, and six planes 3d as planes parallel to the axial direction of the shaft 3a are provided on the outer peripheral surface of the head 3c. Thus, the head 3c is formed in a hexagonal column shape. The shaft 3a of the bolt 3 is inserted through the hole 5a of the washer 5 and the hole 1b of the block 1 in this order. The head 3c presses the washer 5 against the flat surface 1a, and the screw 3b is screwed into the screw hole 2a. Has been.

The distance between the planes 3d facing each other in parallel and forming the head 3c in a hexagonal column shape is longer than the diameter of the shaft portion 3a and the diameter of the hole 5a of the washer 5. The diameter of the hexagonal circumscribed circle of the hexagonal columnar portion forming the head 3 c is smaller than the diameter of the outer peripheral portion of the washer 5. In this way, the washer 5 is sandwiched between the head 3c and the block 1 with the outer periphery of the washer 5 protruding in the radial direction of the shaft 3a from between the head 3c of the bolt 3 and the block 1. ing.

The bolt detent 10 is made of a strip-shaped plate material having elasticity. As the plate material having elasticity, for example, a steel plate including a spring steel plate, a stainless steel plate and the like is used. The bolt detent 10 is provided with a long hole 10e as a first hole and a hexagonal hole 10c as a second hole.

The hexagonal hole 10c has a size that allows the head 3c to be inserted, and is formed in a hexagonal shape by six straight edges. One of the edge portions 10d is provided at a position opposite to the long hole 10e with respect to the hexagonal hole 10c. The head 3c is inserted into the hexagonal hole 10c, and the edge 10d is pressed against one of the six planes 3d.

In a state where the bolt detent 10 is assembled to the bolt 3 and the block 1, the long hole 10 e is provided to be an arc-shaped long hole concentric with the hole 1 b of the block 1. And the screw hole 1c is provided in the position facing the long hole 10e of the block 1, and the screw 7 penetrated by the long hole 10e is screwed by the screw hole 1c. Thereby, the long hole 10 e side of the bolt detent 10 is pressed by the screw 7 along the plane 1 a and fixed to the block 1.

The bolt detent 10 is in contact with the outer peripheral portion of the washer 5 at an intermediate portion between the hexagonal hole 10c and the elongated hole 10e. Here, when the intermediate portion of the bolt detent 10 that is in contact with the outer peripheral portion of the washer 5 is defined as a contact portion 10g, the portion of the long hole 10e fixed to the block 1 moves toward the contact portion 10g. The bolt detent 10 moves away from the block 1 and is separated by the thickness of the washer 5 at the contact portion 10g. From the long hole 10e to the contact part 10g, it is elastically deformed in a convex shape toward the block 1. Further, from the contact portion 10g to the edge portion 10d, the edge portion 10d is separated from the washer 5 with the edge portion 10d pressed against the flat surface 3d. From the contact portion 10g to the edge portion 10d, it is elastically deformed in a concave shape with respect to the washer 5.

Regarding the arrangement and dimensions of each of the hexagonal hole 10c, the edge 10d, and the elongated hole 10e, the elongated hole 10e has a predetermined distance from the edge 10d to the position opposite to the edge 10d with respect to the hexagonal hole 10c. It is provided at a distance. In other words, the head 3c is inserted into the hexagonal hole 10c, the edge 10d is pressed against the flat surface 3d, and the screw 7 is inserted into the elongated hole 10e so as to be fixed to the block 1.

A method of attaching the bolt detent 10 configured as described above will be described with reference to FIGS. The block 1 is overlapped with the block 2 so that the plane 1a side where the screw hole 1c is provided is visible. At this time, the mutual arrangement is determined so that the hole 1b of the block 1 and the screw hole 2a of the block 2 penetrate. Next, after inserting the shaft portion 3a of the bolt 3 into the hole 5a of the washer 5, the shaft portion 3a of the bolt 3 is inserted into the hole 1b of the block 1, and the screw portion 3b of the shaft portion 3a is further inserted into the screw hole of the block 2. Screw in 2a and fasten.

Next, the head 3c of the bolt 3 is fitted into the hexagonal hole 10c of the bolt detent 10 so that the edge 10d is brought into contact with one plane 3d of the six planes 3d. When one plane 3d is selected from among the six planes 3d and the edge portion 10d is brought into contact, the screw 7 inserted through the slot 10e is screwed so that the slot 10e is aligned with the screw hole 1c of the block 1. The plane 3d at a position where the screw can be screwed into the hole 1c is selected and the edge portion 10d is brought into contact therewith. When the edge portion 10d is brought into contact with one flat surface 3d and the tip of the screw 7 inserted through the elongated hole 10e is screwed into the screw hole 1c slightly, the state shown in FIG. 3 is obtained. In this state, the surfaces of the bolt detent 10 and the washer 5 are in contact with each other and overlap, and the bolt detent 10 is separated in parallel with the flat surface 1 a of the block 1.

From this state, the screw 7 is screwed into the screw hole 1c, the long hole 10e side is brought close to the block 1, and the long hole 10e side is pressed along the plane 1a to be fixed to the block 1. At this time, the abutting portion 10g of the intermediate portion of the bolt detent 10 abuts on the outer peripheral portion of the washer 5 on the elongated hole 10e side, and from the elongated hole 10e side of the bolt detent 10 to the abutting portion 10g. The space is elastically deformed in a convex shape toward the block 1.

In this way, the elongated hole 10e side from the contact portion 10g is elastically deformed toward the block 1, so that the bolt detent 10 on the edge portion 10d side from the contact portion 10g has the contact portion 10g as a fulcrum. It floats away from the washer 5 so as to rotate. As a result, the edge portion 10d moves away from the washer 5 and further presses against the abutting flat surface 3d. The edge 10d moves while rubbing against the pressed flat surface 3d. However, if the gap with the flat surface 3d is clogged, the edge 10d cannot move further away from the washer 5. Thereby, the rotation with the contact portion 10g as a fulcrum stops from the contact portion 10g to the edge portion 10d side, and is elastically deformed in a concave shape with respect to the washer 5. In this way, with the edge 10d pressed against the flat surface 3d, the bolt detent 10 is held in a concavely deformed state with respect to the washer 5 between the contact portion 10g and the edge 10d.

Thus, between the contact part 10g and the edge part 10d of the bolt detent 10 is elastically deformed in a concave shape with respect to the washer 5, and the edge part 10d is pressed against the flat surface 3d by the restoring force. For this reason, a small gap does not occur between the edge portion 10d and the flat surface 3d, and a bolt detent that can prevent a minute rotation of the bolt 3 can be obtained. Further, the bolt detent 10 is easy because the head 3c is inserted into the hexagonal hole 10c, the edge 10d is brought into contact with the flat surface 3d, and is fixed to the block 1 with the screw 7 at the portion of the long hole 10e. Can be assembled.

Further, the bolt detent 10 is provided with a long hole 10e in an arc shape concentric with the hole 1b of the block 1. When the screw 7 is inserted into the long hole 10e and then screwed into the screw hole 1c, the direction of the bolt detent 10 fixed to the block 1 is changed by shifting the relative position of the long hole 10e and the screw hole 1c. be able to. As a result, even if the orientation of the flat surface 3d of the bolt 3 after screw tightening is in an arbitrary direction, the bolt detent 10 is oriented so that the edge portion 10d contacts the flat surface 3d and fixed to the block 1 can do.

Even when the position of the flat surface 3d in contact with the edge portion 10d is shifted due to external force applied to the block 1 or block 2, the elastically deformed portion between the contact portion 10g and the edge portion 10d remains. The state where the edge 10d is pressed against the flat surface 3d is maintained by expanding and contracting, so that there is no gap between the edge 10d and the flat surface 3d, and the minute rotation of the bolt 3 can be prevented.

Further, since the gap between the contact portion 10g and the edge portion 10d is elastically deformed to press the edge portion 10d against the flat surface 3d, the positional accuracy deviation of the edge portion 10d can be absorbed by changing the amount of elastic deformation. In other words, the bolt detent 10 can prevent minute rotation of the bolt 3 by making the edge portion 10d abut on the flat surface 3d and manufacturing with a dimensional accuracy that allows the screw 7 to be inserted into and fixed to the elongated hole 10e.

Further, since the bolt detent 10 is elastically deformed and does not need to be plastically deformed, it can be used repeatedly even when the bolt detent 10 needs to be removed during maintenance or the like.

Further, in the present embodiment, the case where one edge portion 10d is pressed against one plane 3d has been described. However, for example, an edge adjacent to the edge portion 10d is pressed against the plane 3d facing the edge portion. The two edges may be pressed against the two flat surfaces 3d.

Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIG. FIG. 4 is an overall configuration diagram of a bolt detent showing Embodiment 2 of the present invention. Although the hexagonal hole 10c is provided in the bolt detent 10 in the first embodiment, the dodecagonal hole 20c is provided in the bolt detent 20 in the present embodiment. Note that components having the same reference numerals as those in the other embodiments show the same parts in the present embodiment, and description thereof is omitted.

In FIG. 4, the bolt detent 20 is made of a strip-shaped plate material having elasticity. The bolt detent 20 is provided with a long hole 20e and a dodecagonal hole 20c. The dodecagonal hole 20c is formed by superposing one hexagonal hole and another hexagonal hole rotated 30 degrees around the center axis of the hexagonal hole. . The dodecagonal hole 20c is sized to allow the head 3c to be inserted.

Two linear edges are arranged in a straight line with a gap between each other to form a set of edges, and 12 sets of edges form a dodecagonal hole 20c. One set of the edge portions 20d is provided at a position opposite to the elongated hole 20e with respect to the dodecagonal hole 20c. The head 3c is inserted into the dodecagonal hole 20c, and the edge 20d is pressed against one plane 3d of the six planes 3d. A screw 7 is inserted into the long hole 20 e and pressed along the flat surface 1 a of the block 1, and the bolt detent 20 is fixed to the block 1. The bolt stopper 20 is in contact with the outer peripheral portion of the washer 5 at the contact portion 20g at the intermediate portion between the dodecagonal hole 20c and the elongated hole 20e.

In this way, the number of edges increases by making the hole through which the head 3c is inserted into the dodecagonal hole 20c, so that the edge 20d is aligned with the plane 3d while aligning the positions of the long holes 20e and the screws 7. The operation of adjusting the direction of the bolt detent 20 so as to abut is facilitated.

Embodiment 3 FIG.
A third embodiment of the present invention will be described with reference to FIG. FIG. 5 is an overall configuration diagram of a bolt detent showing Embodiment 3 of the present invention. In the first and second embodiments, the case where six flat surfaces 3d are provided on the head 3c of the bolt 3 has been described. In the present embodiment, four planes 4 d parallel to the axial direction of the shaft portion (not shown) are provided on the head 4 c of the bolt 4. Note that components having the same reference numerals as those in the other embodiments show the same parts in the present embodiment, and description thereof is omitted.

The bolt detent 30 is provided with a long hole 30e and a square hole 30c. The quadrangular hole 30c has a size that allows the head 4c to be inserted, and is formed into a quadrangular shape by four straight edges. One of the edge portions 30d is provided at a position opposite to the elongated hole 30e with respect to the rectangular hole 30c. The head 4c is inserted into the rectangular hole 30c, and the edge 30d is pressed against one of the four planes 4d.

In this way, if the edge portion 30d is pressed against the flat surface 4d of the bolt 4, it is possible to prevent the bolt 4 from being slightly turned regardless of the shape of the head 4c and the shape of the hole through which the head 4c is inserted. Bolt detents can be obtained.

1 block, 3, 4 bolt, 3a shaft, 3d, 4d plane, 3c, 4c head, 5 washer, 7 screw, 10, 20, 30 bolt detent, 10c hexagonal hole, 20c dodecagonal hole 30c square hole,
10d, 20d, 30d edge, 10e, 20e, 30e oblong hole

Claims (2)

The bolt is provided with a head at the end of the shaft portion, and an outer peripheral surface of the head is provided with a plane parallel to the axial direction of the shaft portion,
The bolt is screwed in a state where a washer sandwiched between the head and the member to be fastened protrudes in a radial direction of the shaft portion from between the head and the member to be fastened,
In the bolt detent that is in contact with the flat surface and fixed to the fastened member with a screw,
It is made of an elastic plate material having a first hole for inserting the screw,
Forming a second hole large enough to be inserted through the head and having a linear edge abutting against the plane;
The first hole is provided at a position opposite to the edge with respect to the second hole at a predetermined distance from the edge ,
An intermediate portion between the first hole and the second hole is brought into contact with the outer peripheral portion of the washer, and the space between the first hole and the intermediate portion is elastically convex toward the fastened member. The second hole is sized so that a gap is opened between the head and the intermediate portion while being deformed and elastically deformed in a concave shape with respect to the washer between the intermediate portion and the edge portion. A bolt detent characterized by being formed . The bolt is provided with a head at the end of the shaft portion, and an outer peripheral surface of the head is provided with a plane parallel to the axial direction of the shaft portion,
The bolt is screwed in a state where a washer sandwiched between the head and the member to be fastened protrudes in a radial direction of the shaft portion from between the head and the member to be fastened,
A method for assembling a bolt detent made of an elastic plate-like material fixed to the fastened member with a screw after being brought into contact with the plane,
Inserting the head into a second hole provided in the bolt detent;
Abutting a linear edge forming the second hole against the plane;
The screw is inserted into a first hole provided at a predetermined distance from the edge at a position opposite to the edge with respect to the second hole, and is along the member to be fastened. Fixed,
An intermediate portion between the first hole and the second hole is brought into contact with an outer peripheral portion of the washer;
The first hole and the intermediate portion are elastically deformed in a convex shape toward the fastened member and the intermediate portion and the edge portion are elastically deformed in a concave shape with respect to the washer. Pressing the edge against the plane;
Assembly method of bolt detents including

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