JPS6020814Y2 - fasteners - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tightening tool for fixing two objects, and particularly to a tightening tool for attaching a mounting member such as a component to a vibrating object.

As shown in FIGS. 1 and 2, a conventional tightening device of this kind has a flange 2 provided at one end of an elastic hollow cylindrical body 1 made of an elastic member such as a tubular rubber, and a flange 2 provided at one end of the elastic hollow cylindrical body 1 formed from a tubular elastic member such as rubber. A threaded part 3 made of a non-elastic material such as metal or plastic is integrally molded on the inner circumferential surface, and sometimes an elastic hollow cylinder is formed on the mounting part 4 of a main body such as a vibrating engine. Pass it through the mounting hole 5 and abut the mounting part 6 of the mounting part on the flange side. A tightening bolt 7 is inserted into the elastic hollow cylinder from the outside of the mounting part 6 of the mounting part, and is screwed into the threaded part 3 and tightened. There is one that fixes both attachment parts 4 and 6 by forming an enlarged part 8 with raised meat.

Although these types of fasteners are easy to install and have sufficient vibration absorption capacity, they are said to have insufficient tightening force when attached to large vibrating objects, and may loosen over a long period of time. There were drawbacks.

In view of this, an object of the present invention is to provide a tightening tool that has sufficient tightening force and does not loosen even when used on a large vibrating object.

Embodiments of the present invention will be described below with reference to FIGS. 3 and 4.

In Fig. 3, an elastic hollow cylinder body 1 made of a tubular elastic member
0 has a flange 11 at one end, and a threaded portion 12a of an inelastic member is integrally molded with the elastic hollow cylinder 10 on the inner peripheral surface of the elastic hollow cylinder 10 on the opposite side from the flange. A cylindrical unthreaded tightening force reinforcing portion 12b is pushed away from the portion 12a toward the flange side along the inner circumferential surface 10a of the elastic hollow cylinder while maintaining a small gap from the inner circumferential surface 10a. A predetermined distance is provided between the tightening force reinforcing portion 12b and the flange end surface.

When tightening, the elastic hollow cylindrical body 10 is inserted into the mounting hole 1 formed in the first tightened member 13 such as an engine body mounting part.
4, and the flange back surface 11a is brought into contact with it, and the second tightened member 15, such as a mounting part of a component to be attached to the engine, is brought into contact with the flange end surface 11b, and the tightening bolt 16 is inserted into the second tightened member. The tightening member 15 is tightened and fixed to the threaded portion 12a through a bolt through hole 17 formed in the tightening member 15.

Then, the length of the elastic hollow cylindrical body 10 is reduced, and the tip of the tightening force reinforcing portion 12b comes into contact with the surface of the second member to be tightened, and the inside of the cylinder at the end opposite to the flange 11 of the elastic hollow cylindrical body 10 is reduced. The enlarged portion 18 is raised and the first tightened member 13 is fixed between the enlarged portion 18 and the flange back surface 11a.

In addition, the head 16a of the tightening bolt 16 and the flange end surface 1
The second member to be tightened 15 is fixed between the head 16a and the head 16a.
A spring washer 19 is attached between the gap and the surface of the second member 15 to be tightened.

Since the threaded portion 12a and the tightening force reinforcing portion 12b are made of a relatively hard material such as plastic or metal, a strong pressing force acts between the tightening force reinforcing portion 12b and the coughing surface of the second member to be tightened. Even if the tightening tool is used for an object with strong vibrations such as an engine, the double-wave tightening members 13 and 15 will not loosen.

Furthermore, since the spring washer 19 is also used, the effect is significantly increased.

Although the tightening force reinforcing portion 12b in FIG. 3 has a cylindrical shape, it may be formed with a large number of annular contact pieces 20 as shown in FIG. 5.

In the present invention, a threaded portion 12a of a non-elastic member is integrally formed on the inner circumferential surface of the elastic hollow cylinder 10 on the opposite side from the flange, and the elastic hollow cylinder body 10 is provided with a flange at one end. The tightening force reinforcing part 12b is extended along the inner circumferential surface of the flange to the vicinity of the flange side end, and the members to be tightened to be fixed to each other are made to face each other with the flange in between, and the tightening bolt is connected to one of the tightened members in contact with the flange side end surface. The member 15 is screwed onto the threaded portion from the outside and tightened until the tip of the tightening force reinforcing portion abuts one of the members to be tightened, thereby forming an enlarged portion 18 in which the inside of the cylinder is raised on the threaded portion side of the elastic hollow cylindrical body. Since the two members to be tightened are tightened and fixed in this manner, the tightening force reinforcing portion 12
Even when a large pressing force acts between the tip of b and the surface of one of the members to be tightened, and the attachment parts are attached to objects that vibrate strongly, the attachment parts will be firmly fixed for a long period of time and will not come loose. However, since the tightening bolt rotates along the inner circumferential surface of the tightening force reinforcing portion that does not deform much during tightening, the effect is that the resistance received from the circumferential surface is relatively small.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view of a conventional elastic hollow cylinder, and Fig. 2 is a longitudinal sectional view of a conventional elastic hollow cylinder.
FIG. 3 is a longitudinal cross-sectional view of an elastic hollow cylinder according to the present invention, FIG. 4 is an explanatory diagram of the tightening state of the present invention, and FIG. FIG. 7 is a cutaway view of main parts showing another embodiment of the force reinforcing section. 10...Elastic hollow cylinder, 11...Flange, 12a...Threaded portion, 12b...
Tightening force reinforcement part, 13.15... Member to be tightened, 1
8... Enlarged section.

Claims (1)

[Scope of utility model registration request] It has an elastic hollow cylindrical body with a flange at one end, and a threaded portion that is stronger than the non-elastic member is integrally molded on the inner circumferential surface of the elastic hollow cylindrical body on the opposite side from the flange, and from this threaded portion, the elastic hollow cylindrical body is A tightening force reinforcing section is extended along the inner circumferential surface of the cylindrical body to near the end surface on the flange side, the members to be tightened to be fixed to each other are made to face each other with the flange in between, and the tightening bolt is attached to the end surface on the flange side. Screw it into the threaded part from the outside of one of the members to be tightened, and tighten until the end face of the tightening force reinforcing part abuts the one member to be tightened, and the inside of the elastic hollow cylinder body is formed on the opposite side of the flange of the elastic hollow cylinder. A tightening tool that tightens and fixes two members to be tightened so as to form a raised enlarged portion.