JPH0429186Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rubber hose in which the inner diameter of the rubber hose is inserted and connected to the outer diameter of a pipe made of metal or the like by a predetermined distance.

[Prior art]

Conventionally, when connecting a rubber hose to a metal pipe or the like, the inner diameter of the rubber hose is inserted into the outer diameter of the pipe by a predetermined insertion distance, and the connection is made.

[Problem that the invention attempts to solve]

By the way, as shown in FIG. 4, when the rubber hose 5 is bent greatly starting from the pipe tip 1a, the rubber hose inner surface 5a is bent at the pipe tip 1a.
The contact surface contacts the edge portion of the contact portion, and a crack K occurs on the inner surface of the contact portion. This crack K is rubber hose 5
There was a problem in that the pressure passing through the inside gradually led to cracks leading to the outside, eventually leading to breakage.

In addition, for the purpose of improving the sealing performance of the connection part between the hose and the pipe,
A hose such as that disclosed in Publication No. 96875 has been proposed.

However, when the hose of this invention is used with the connecting part between the pipe and the hose bent, the shape of the inner diameter of the hose at this connecting part is deformed due to the deformation caused by the bending, and this deformation causes the inner diameter to be cut. This has the disadvantage that the area becomes smaller, making it difficult for the fluid flowing inside to pass through.

In addition, the thickness of the hose becomes thinner by the amount that the circumferential groove is formed, and the pressure of the fluid flowing through the hose tends to concentrate at the closed end of the circumferential groove. There is also the problem that the strength of the hose is reduced.

In view of the above problems, the present invention can prevent cracks from occurring on the inner surface of the rubber hose when it is freely bent, and furthermore, it is possible to prevent cracks from occurring on the inner surface of the rubber hose when it is freely bent. An object of the present invention is to provide a rubber hose that can prevent deformation of the inner diameter shape of the bent portion, that is, a reduction in the cross-sectional area of the inner diameter, even when used with the connecting portion of the rubber hose bent.

[Means to solve the problem]

In order to achieve the above object, the rubber hose of the present invention has a rubber hose whose inner diameter is inserted a predetermined distance into the outer diameter of the pipe, and a rubber hose that extends from the front and back of the pipe tip position to the part facing the pipe tip. The pipe has a large-diameter portion that has an inner diameter larger than the outer diameter of the pipe and is expandable and retractable in a bellows shape so as to avoid contact with the pipe.

[Effect]

Therefore, the pipe tip 1a of the rubber hose 5
In the part facing the pipe, there is a large diameter part 6 whose inner diameter is larger than the outer diameter of the pipe 1 over the front and back of the pipe tip 1a position.
is provided, so that even when the rubber hose 5, whose inner diameter is inserted a predetermined distance into the outer diameter of the pipe 1, is bent at a predetermined angle starting from the pipe tip 1a, the inner surface 6a of the large diameter portion is inserted into the pipe tip 1a. Never come into contact with. Therefore, it is possible to reliably prevent cracks K from occurring due to the inner surface of the rubber hose 5 coming into contact with the pipe tip 1a.

〔Example〕

Hereinafter, the drawings showing the present invention as an embodiment will be explained.

In FIG. 1, a pipe 1 made of metal or the like is provided with a stopper 2 and a stopper 3 having a large diameter at a predetermined distance from its tip 1a. The inner diameter of a rubber hose 5, which will be described later, is inserted over a predetermined distance L in front of the stopper 3 on the back side.

A position where the rubber hose 5 is inserted into the pipe 1 by a predetermined distance L, that is, a pipe tip 1a inserted by a predetermined distance L from the end surface 5b of the rubber hose 5.
In the part facing the pipe, there is a large diameter part 6 whose inner diameter is larger than the outer diameter of the pipe 1 over the front and back of the pipe tip 1a position.
The large diameter portion 6 is formed to have a predetermined width B across the front and back of the pipe tip 1a, and the width B of the large diameter portion 6 can be increased or decreased depending on the bending angle of the rubber hose 5.

As shown in FIG. 2, the rubber hose 5 inserted into the outer diameter of the pipe 1 by a predetermined distance L is fixed with a clip 7 to prevent it from coming out. 6a does not come into contact with the edge portion of the pipe tip 1a even when the rubber hose 5 is bent over a predetermined angle starting from the pipe tip 1a as shown in FIG.

In addition, in order to allow the rubber hose 5 to bend freely at this large-diameter portion 6, the large-diameter portion 6 is formed into a bellows-like expandable and contractible shape as shown in the figure. , bending part extension side S
The large diameter portion inner surface 6a is deformed so as to move away from each other, and the bent portion contracting side T is deformed such that the large diameter portion inner surface 6a approaches each other.

Therefore, the deformation caused by bending is absorbed by the rubber hose 5 expanding and contracting in a bellows-like manner, and the inner diameter shape of the rubber hose 5 before and after the large diameter portion 6 is hardly deformed due to bending. It will be connected to the pipe 1 while maintaining its circular shape.

For example, when this rubber hose 5 has a structure in which the distance between the pipes 1 to be connected is short,
Or rubber hose 5 inserted into pipe 1
It can be used particularly effectively when the structure swings around.

[Effect of idea]

The rubber hose of the present invention has an inner diameter that is inserted into the outer diameter of the pipe by a predetermined distance, and the inner diameter of the rubber hose is extended to the front and back of the pipe tip position at a portion facing the pipe tip, and the inner diameter is inserted a predetermined distance into the outer diameter of the pipe. is larger than the outer diameter of the pipe, and
Since the large-diameter portion is provided that can be expanded and contracted in a bellows shape, the following effects can be achieved.

The large diameter part of the rubber hose, whose inner diameter is inserted a predetermined distance into the outer diameter of the pipe, is formed across the front and back of the tip of the pipe to avoid contact with the tip of the pipe. Even when this rubber hose is bent, the inner surface of the large diameter part almost never comes into contact with the tip of the pipe.
In addition, even if they do come into contact, they will not be pressed too hard, so it will definitely prevent the inner surface of the rubber hose from coming into contact with the tip of the pipe, causing a crack, which will grow and damage the rubber hose. It can be prevented.

In addition, since this large-diameter portion is formed into a bellows-like expandable shape, when this rubber hose is bent at the large-diameter portion, this large-diameter portion acts as a kind of buffer, causing deformation due to bending. is absorbed by the rubber hose expanding and contracting in a bellows-like manner, and the rubber hoses at the front and rear of the large diameter section have almost no deformation of the inner diameter due to bending, and are connected to the pipe while maintaining an almost circular shape. Therefore, no resistance is generated due to the narrowing of the inner diameter cross-sectional area of the rubber hose.

[Brief description of the drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a vertical sectional side view showing a pipe and a rubber hose individually;
FIG. 2 is a longitudinal side view showing a state in which the pipe is inserted into the rubber hose, and FIG. 3 is an explanatory view showing the action of the rubber hose in a bent state. FIG. 4 shows a conventional example, and is an explanatory diagram showing the bending state of the rubber hose. 1...Pipe, 1a...Pipe tip, 5...Rubber hose, 6...Large diameter part, 6a...Inner surface of large diameter part, K...Crack, L...Predetermined insertion distance.

Claims (1)

[Scope of utility model registration request] A rubber hose whose inner diameter is inserted a predetermined distance into the outer diameter of the pipe faces the tip of the pipe, and the inner diameter is larger than the outer diameter of the pipe so as to avoid contact with the tip of the pipe. A rubber hose that is large and has a large diameter part that can be expanded and contracted in a bellows shape.