JPH026319Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a holding structure for a clamp fitting that tightens and fixes a fitting portion between two pipes or a fitting portion between a pipe and another component.

FIG. 1 is a plan view showing a conventional clamp fitting 1. This clamp fitting 1 includes a band 2 formed in a substantially annular shape, a screw 3 inserted between both ends 2a and 2b of the band 2, and a nut 4 that is screwed into this screw 3, and by tightening this nut 4 or screw 3, the inner diameter L is reduced, and a pipe (not shown) inserted into the inner diameter is tightened and fixed. It is.

FIGS. 2a and 2b show an inlet port 5a of an engine (not shown) and an outlet port 6 of a carburetor 6 (not shown) using the above-mentioned clamp fitting 1.
The same parts as in FIG. 1 are denoted by the same reference numerals in the main part partial sectional view showing the state in which the intake pipe 7 that connects the intake pipe 7 to the outlet port 6a of the carburetor 6 is tightened and fixed, and the AA sectional view thereof. In FIG. 2a, an intake pipe 7 made of an elastic material such as rubber has one end 7a fitted into an outlet port 6a of a carburetor 6 and supported there. The other end 7b of the intake pipe 7 is fastened and fixed to an inlet port 5a of the engine with a bolt 8.

Also, outlet port 6 of carburetor 6
A clamp fitting 1 is fitted to the outer periphery of a fitting portion 7c between the intake pipe 7a and one end 7a of the intake pipe 7,
As shown in FIG. 2b, the clamp fitting 1 is removed using a tool such as a screwdriver (not shown).
The intake pipe 7 is firmly fixed to the outlet port 6a of the carburetor 6 by tightening the screw 3 or nut 4. In FIG. 2b, reference numeral 9 denotes a splint, and this splint 9 is arranged between the intake pipe 7 and the clamp fitting 1 to prevent the clamp fitting 1 from hitting unevenly.

By the way, according to the conventional clamp fitting 1 described above, the clamp fitting 1 is attached to the intake pipe 7.
The clamp fitting 1 will rotate or move if you try to tighten the screw 3 or nut 4 of the clamp fitting 1 with a tool such as a screwdriver. Therefore, there is a drawback that the tightening workability of the clamp fitting 1 is extremely reduced, and when the intake pipe 7 is removed from the outlet port 6a of the carburetor 6, the clamp fitting 1 is removed from the intake pipe 7. There was also a risk that it would fall off.

In view of the above-mentioned circumstances, this invention prevents the clamp fitting from moving in the circumferential direction and axial direction of the pipe when the pipe is tightened and fixed by the clamp fitting, and also The purpose of this product is to provide a holding structure for a clamp fitting that prevents the clamp fitting from falling off from the pipe. A convex portion of the elastic body having a cylindrical neck portion having a diameter at least smaller than the head portion of the elastic body is formed at one location, and the hemispherical head portion is inserted into the clamp fitting on the opposite side from the tightening portion. A hole is formed at one location to fit into the neck of the protrusion and position and hold the clamp fitting so that it cannot escape from the neck of the protrusion.

Hereinafter, one embodiment of the clamp fitting holding structure according to the present invention will be described in detail.

Figures 3a, b, and c are sectional views of main parts showing the holding structure of the clamp fitting according to the present invention, respectively, and its BB
In the sectional view and bottom view of essential parts, the same parts as in FIG. 2 are designated by the same reference numerals.

In FIG. 3a, the fitting portion 7c of the intake pipe 7 fitted into the outlet port 6a of the carburetor 6, and the end 2 of the band 2 of the clamp fitting 1.
A convex portion 7d of an elastic body having a hemispherical head and a cylindrical neck having a diameter at least smaller than the head is formed integrally with the intake pipe 7 at a position opposite to a. .

On the other hand, approximately in the middle of the band 2 of the clamp fitting 1, on the opposite side of the tightening part consisting of the nut 4 and the screw 3, the hemispherical head is inserted into the neck of the convex part 7d. A hole 2c is formed into which the clamp fitting 1 is fitted and positioned and held so that it cannot escape from the neck of the convex portion 7d. Note that this hole 2
The diameter of c is smaller than at least the head of the convex portion 7d.

Therefore, according to the above-described configuration, the clamp fitting 1 is wound around the fitting portion 7c of the intake pipe 7, and then the clamp fitting 1 is inserted into the hole 2 of the clamp fitting 1.
c is a convex portion 7 formed on the intake pipe 7;
When the hemispherical head d is inserted into the hemispherical head while deforming the head and the hole 2c is fitted into the neck of the convex portion 7d, the clamp fitting 1 is inserted into the convex portion 7d.
The body will be held in position from the neck of the body, making it impossible to escape.

In the above embodiment, the present invention is applied to the intake pipe 7 that connects the outlet port 6a of the carburetor 6 and the inlet port 5a of the engine, and the clamp fitting 1 that tightens and fixes this. Of course, the present invention is not limited to the above-mentioned embodiment, and the present invention may be applied to a pipe that is connected to another article and a clamp fitting 1 that tightens and fixes the same.

As described above, in the present invention, the clamp fitting for tightening and fixing the fitting part of the pipe is positioned and held on the fitting part of the pipe so that it cannot fall off before the clamp fitting tightens and fixes the fitting part of the pipe. There is no risk of the clamp fitting falling off the pipe before it is connected, and the clamp fitting does not move in the circumferential direction of the pipe or in the axial direction of the pipe when tightening the clamp fitting. Improves workability.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a conventional clamp fitting, and FIGS. 2 a and b are sectional views of main parts showing the holding structure of the conventional clamp fitting, and its AA sectional view,
FIGS. 3a, b, and c are a sectional view of the main part, a BB sectional view thereof, and a bottom view of the main part of FIG. 3a, respectively, showing the holding structure of the clamp fitting according to the present invention. 1...Clamp fitting, 2c...hole, 2d...notch, 7...intake pipe, 7c...fitting part.

Claims (1)

[Scope of Claim for Utility Model Registration] In a holding structure for a clamp fitting having a tightening part consisting of a nut and a screw for tightening and fixing a fitting part of a pipe, the fitting part of the pipe is provided with a hemispherical head and the hemisphere. A convex portion of an elastic body having a cylindrical neck portion having a diameter at least smaller than the head portion of the elastic body is formed at one location, and a convex portion of the elastic body having a cylindrical neck portion having a diameter at least smaller than the head portion of the elastic body, and a convex portion of the elastic body having a cylindrical neck portion having a diameter smaller than the head portion of the elastic body, a hole having a diameter smaller than at least the head of the convex part, which is inserted into the neck of the convex part while deforming the head, and is positioned and held so that the clamp fitting cannot escape from the neck of the convex part; A holding structure for a clamp fitting, characterized in that it is formed in one place.