JPH0667915U - Washer - Google Patents

Abstract

(57) [Summary] [Purpose] When tightening a bolt and a nut, it is an object of the present invention to provide a washer that can be tightened only by tightening the bolt without fixing the nut. [Structure] Substrate 2 provided with through-hole 3 through which screw body 7 is inserted
And at least one or more protrusions 4 which are provided on the substrate 2 outside the through hole 3 and which are substantially vertically projected at a position where the outer surface of the nut 6 abuts to stop the rotation of the nut 6.
And a locking portion 5 protruding from the surface of the substrate 2 opposite to the protruding portion 4.
It consists of and.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to washers such as bolts, and more particularly to washers used for soft materials such as wood.

[0002]

[Prior art]

 Conventionally, so-called flat washers, spring washers, etc. have been known as washers, and it is common to dispose these washers under nuts etc. and fasten them with bolts etc.

[0003]

[Problems to be solved by the device]

 However, with conventional washers, when tightening a nut on a bolt, etc., the nut and washer rotate as the bolt rotates. Since it is necessary to rotate and fasten, it is troublesome to fix the nut with one hand and tighten the bolt with the other hand, and there is a problem of inefficiency.

Further, when the material to be fastened is thick, there is a problem that it is difficult to reach, or it is difficult to apply force because the arm is open even if the material is reached.

The present invention has been made in view of such problems of the conventional technology, and the purpose thereof is to fix the nut when the bolt and the nut are fastened. Also intends to provide a washer that can be fastened simply by tightening the bolts.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, a washer according to the present invention has a board provided with a through hole for inserting a screw body, and an outer surface of the nut outside the through hole on the board. It has at least one or more protrusions that are provided so as to protrude substantially vertically at positions where they come into contact with each other to stop rotation of the nut, and a locking portion that is provided so as to protrude on a surface opposite to the protrusion of the substrate.

[0007]

[Action]

 According to the washer according to the present invention, the washer is inserted from the tip of the bolt inserted into the through hole formed in the member to be fastened such as wood and the nut is screwed. Then, the nut is arranged so as to come into contact with the protruding portion provided on the substrate, and the nut is screwed in until the tip of the engaging portion provided on the surface opposite to the protruding portion comes into contact with the member to be fastened.

In this manner, the head of the bolt is spun with the nut protruding from the board contacting the nut and the tip of the engaging portion protruding from the board contacting a fastened member such as wood. When the screw is turned in the screw-in direction, the nut rotates with the rotation of the bolt and the washer also tries to rotate, but friction between the tip of the locking part and the surface of the fastened member such as wood. The force prevents rotation of the washer.

When the washer is prevented from rotating, the nut sandwiched between the protrusions provided on the washer is also prevented from rotating, so that the nut is screwed by the rotation of the bolt. When the nut is screwed in, the washer is pressed by the member to be fastened, the locking part protruding from the washer bites into the fastened member such as wood, and prevents the washer from rotating with a stronger force to fasten the washer. It works to firmly lock the member.

Therefore, the more the bolt is rotated in the screwing direction, the more the nut is screwed, the more the washer is pressed against the member to be fastened, and the locking portion protruding from the washer bites further into the member to be fastened. As a result, the washer is more firmly fixed to the member to be fastened, so that the member to be fastened is firmly fastened by the bolt and the nut.

[0011]

【Example】

 An embodiment of the present invention will be described with reference to the drawings.

The washer 1 according to the present invention has, as shown in FIG. 1, for example, a through hole 3 formed in a substantially central portion of a substrate 2 made of a square stainless steel plate having a thickness of about 1 to 3 mm. On a straight line passing through the center of the through hole 3, the opposing inner wall surfaces of the through hole 3 are cut and bent substantially perpendicular to the surface of the substrate 2 to provide a pair of protrusions 4, and further to form a square. The triangular engaging portions 5 are provided by bending the opposite corners of the substrate 2 in the direction opposite to the protrusions 4 and substantially perpendicular to the surface of the substrate 2. The shape of the substrate 2 is not limited to a square, but may be a trapezoid, a parallelogram, an ellipse, or the like.

The protrusion 4 is arranged at a position where the opposite outer surfaces 6 a of the nut 6 are fitted, and the stainless plate is cut out in accordance with the size and shape (hexagon or square) of the nut 6. Although it is bent at a substantially right angle, it is desirable to provide the protrusion 4 with a slight gap between the outer surface 6a of the nut 6 and the protrusion 4 for easy fitting. . The protrusions 4 may be welded by welding or the like, and the number of the protrusions 4 is not limited to one pair and may be only one. However, as shown in FIG. 3 and FIG. There may be two or three pairs according to 6a.

Also, the locking portion 5 is not limited to a pair of opposing corner portions, and may be provided at only one location, but as shown in FIG. 5, it may be provided by bending all four corners. Needless to say. The locking portion 5 provided in this way has a sharp triangular shape at the tip, and when the tip is brought into contact with wood or the like and pressed by the nut 6, it bites into the wood or the like and locks. It is like this. In addition, in order to make it easier for the tip to bite into wood or the like, it is desirable that the tip be ground to be sharp.

In the washer 1 having the above-described structure, as shown in FIG. 6, the tips of the bolts 7 inserted into the woods A and B are inserted into the through holes 3, and the nuts 6 are screwed into the through holes 3. . Then, when the outer surface 6a of the nut 6 comes into contact with the protruding portion 4 and the tip of the locking portion 5 comes into contact with the wood, the nut 6 and the washer 1 are opened, and the head 7a of the bolt 7 is turned with a spanner or the like. The washer 1 is prevented from rotating by the engaging portion 5 biting into wood or the like, and the nut 6 is abutted and pinched by the protruding portion 4 of the washer 1, so that the nut 6 is attached to the bolt 7. It is screwed in.

In this way, when the nut 6 is screwed into the bolt 7, the nut 6 abutting and sandwiched by the protrusion 4 presses the washer 1 against wood or the like, so that the locking portion 5 is released. It will cut into wood etc. Therefore, as long as the locking portion 5 of the washer 1 is in contact with wood or the like, the bolt 7 and the nut 6 can be firmly fixed only by turning the bolt 7.

[0017]

[Effect of device]

 In the washer according to the present invention, the protruding portion protruding from the washer holds the nut, and the locking portion provided on the surface opposite to the protruding portion bites into the wood or the like to lock the washer to the wooden material or the like. Since the rotation of the nut is prevented by rotating the nut, the bolt and nut can be fastened by simply rotating the bolt without the nut spinning, and the simple structure also reduces the manufacturing cost. , The practical effect is great.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a washer according to the present invention.

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

FIG. 3 is a plan view showing an embodiment of a washer according to the present invention.

FIG. 4 is a plan view showing an embodiment of a washer according to the present invention.

FIG. 5 is a plan view showing an embodiment of a washer according to the present invention.

FIG. 6 is a schematic side view showing a usage state of the above embodiment.

[Explanation of symbols]

 1 Washer 2 Board 3 Through Hole 4 Projection 5 Locking Part 6 Nut 7 Screw Body (Bolt)

Claims (1)

[Scope of utility model registration request] 1. A substrate provided with a through-hole for inserting a screw body, and a position on the substrate outside the through-hole and at a position where an outer surface of the nut abuts to stop rotation of the nut. A washer comprising: at least one or more protrusions that are vertically provided and a locking portion that is provided on a surface opposite to the protrusion of the substrate.