JPS5851496Y2 - Fitting for resin hose - Google Patents

Description

[Detailed description of the invention] The present invention provides a wavy peripheral wall in which hard parts and soft parts are alternately located in the axial direction, and the outer peripheral surface of the soft part is located closer to the axial center than the outer peripheral surface of the hard part. A fitting for connecting and fixing a joint to the end of a resin hose, specifically, a fitting that is fitted inside the end of a resin hose and has stepped portions at multiple locations in the axial direction on its outer circumferential surface. Possible inner cylinder, and
An outer cylinder that is externally fitted onto the end of the hose, and the outer cylinder as a reaction force member, when the inner cylinder is deformed to expand its diameter, the shaft center is moved at a position closer to the shaft center than the outer circumferential surface of the hard part of the hose. It consists of a group of members that press against the soft portion at a plurality of locations in a direction, and is configured so that the inner tube and the group of press contact members are clamped and fixed to the hose in a manner that prevents it from coming off as the inner tube is deformed to expand its diameter. In other words, it is fixed to the resin hose by crimping the inner cylinder to expand the diameter of the inner cylinder, so it is fixed to the resin hose so that it does not come out, for example, by crimping the outer cylinder. When dealing with large-diameter resin hoses, it is advantageous both in terms of equipment and work, such as requiring a smaller crimping device. In addition to the inner cylinder, this outer cylinder also acts not only as a reaction force member, but also as a retaining member through the press contact member group, so that a strong retaining force can be obtained as a whole. The present invention relates to a fitting for a resin hose.

In such a conventional cap, the group of pressing abutting members is made of a rigid body such as a steel wire, but when this is used, the group of pressing abutting members and the outer cylinder are tightly connected in the crimped state. In order for the outer cylinder to fully exhibit its pull-out prevention effect as if it were an integral part, it is necessary to increase the caulking allowance of the inner cylinder and to increase the contact pressure between the outer cylinder and the pressing contact member group. However, when the contact pressure is increased by crimping in this way, the group of press contact members presses the soft part of the hose very strongly, causing a large stress concentration on the soft part of the hose, and as a result, When a pull-out force or the like is applied to the resin hose after crimping and joining, the soft portion of the stress-concentrating hose is susceptible to damage such as breakage or damage.

In view of this situation, the purpose of the present invention is to increase the crimping allowance to strongly and reliably prevent the outer cylinder from coming off as expected, while also minimizing the possibility of hose breakage or damage. has.

The fitting for a resin hose according to the present invention is configured such that the group of suppressing abutting members is made of an elastic body, and the outer cylinder is locked and connected to the inner cylinder in the direction of ejection. It is characterized by

That is, it has the following effects.

■ The outer circumferential surface of the inner cylinder has stepped portions at multiple locations in the axial direction, which provides sufficient blocking action to counter the action of pulling out the hose. By using the tightening method, the frictional force of the inner surface of the hose against the inner cylinder is increased uniformly over the entire hose fitting part in the axial direction by a cooperative action with the outer cylinder,
Even if the outer cylinder is not connected to the inner cylinder, the hose can be sufficiently prevented from being pulled out.

@ By configuring the press contact member group from an elastic body,
The frictional force with the outer cylinder can be increased by increasing the caulking margin, and the elastic deformation of the suppression abutment member group allows the pressing force of the suppression abutment member group against the soft part of the hose to be dispersed in the tube axis direction. Stress concentration is alleviated, and when external forces such as bending or tension are applied to the hose, the soft part of the hose can be sufficiently prevented from breaking or being damaged, and the contact area between the pressure contact member group and the soft part of the hose can be reduced. By making it wider, the frictional force between the two can be further increased.

O Even if the outer cylinder is not connected to the inner cylinder, the action of preventing the hose from being pulled out is sufficient, but the outer cylinder is further configured to lock and connect with the inner cylinder in the direction in which the hose is pulled out. When fitting the hose tip into the inner cylinder, by moving the outer cylinder in the opposite direction to the direction in which it is removed from the inner cylinder, the inner cylinder tip is exposed to the outside and the hose tip is inserted into the inner cylinder. In addition to making it easier to fit the hose into the outside, the inner and outer tubes, which have a large frictional force against the inner and outer surfaces of the hose, work together more securely from both the inside and outside of the hose when the hose is removed. The hose can be prevented from being pulled out.

Hereinafter, an embodiment of the present invention will be described based on the drawings. Hard parts 1 and soft parts 2 are alternately located in the axial direction of the hose, and the outer peripheral surface of the soft part 2 is connected to the hard part 1.
Synthesis having a peripheral wall 3 which has a wavy shape and is located closer to the axis than the outer peripheral surface, and is constructed by fixing a hard spiral body a to the outer peripheral surface of a soft tube b so that its inner peripheral surface becomes the inner peripheral surface of the cylinder. This is a cap B for connecting and fixing a joint C to an end of a resin hose A, and is constructed as follows.

In other words, the metal inner cylinder is fixedly connected to the joint C, is fitted into the end of the hose A, and has stepped portions 4a at multiple locations in the axial direction on its outer circumferential surface and is deformable to expand its diameter. 4, the inner cylinder 4 is locked and connected in the direction of ejection, and the metal outer cylinder 5 is externally fitted onto the end of the hose A, and the inner cylinder 4 is connected to the inner cylinder 4 on its inner periphery. In the state where the diameter is expanded and deformed so that the surface is flush with the inner circumferential surface of the hose, the outer cylinder 5 is used as a reaction force member, and the hose A is moved at a position closer to the hose axis than the outer circumferential surface of the hard part 1 of the hose A. A group of members 6 are provided which are in pressure contact with the soft portion 2 at a plurality of locations in the axial direction, so that the pressure abutment members 6 and・The group is crimped to the outer cylinder 5 and the hose soft part 2, and the inner cylinder 4 is crimped to the hose A, and the pressing contact member 6 is crimped to the hose axis center to the hard part 1. It is configured to be fixed to the hose A by being engaged with the hose A in the direction shown in FIG.

The group of press abutting members 6 is made of one piece that is elastically deformed so as to fill the cavity between the outer circumferential surface of the soft part 2 and the inner circumferential surface of the outer cylinder 5 when the hose is fixed to prevent it from coming off. It is constructed from spiral rubber.

In addition to rubber, resin can be used as the elastic body constituting the pressing contact member 6, and the hose A targeted by the present invention may be other than the hose A shown in the above-mentioned practical example. ,
Examples include those having a cylindrical outer circumferential surface, and those having a peripheral wall formed by embedding hard annular bodies at multiple locations in the hose axis direction of a soft tube.

In addition, the present invention provides a group of press abutting members 6 and 6 in order to facilitate attachment of the outer cylinder 5 and the group of press abutting members 6 to the end of the hose.
- The group may be adhered and held on the outer cylinder 5.

[Brief explanation of drawings]

The drawings show an embodiment of the fitting for a resin hose according to the present invention, and FIG. 1 is a partially cutaway front view showing the state before diameter expansion;
FIG. 2 is a partially cutaway front view showing the state after diameter expansion. 1... Hard part, 2... Soft part, 3...
... Peripheral wall, A ... Resin hose, 4 ...
...Inner cylinder, 5...Outer cylinder, 6...Press contact member.

Claims (1)

[Claims for Utility Model Registration] ■ The hard part 1 and the soft part 2 are arranged alternately in the axial direction, and the outer peripheral surface of the soft part 2 is located closer to the axial center than the outer peripheral surface of the hard part 1. is fitted into the end of a resin hose A having a peripheral wall 3, and has stepped portions 4a0. An inner cylinder 4 whose diameter can be expanded and deformed,
and an outer cylinder 5 that is fitted onto the end of the hose A, and
Using this outer cylinder 5 as a reaction force member, when the inner cylinder 4 is deformed to expand its diameter, the soft part 2 of the hose A is applied to the soft part 2 at a plurality of locations in the axial direction at positions closer to the axis than the outer peripheral surface of the hard part 1 of the hose A. This resin hose is composed of six groups of press-contacting members, and is configured such that the inner cylinder 4 and the six groups of press-contact members are clamped and fixed to the hose A in a manner that prevents them from coming off by expanding the diameter of the inner cylinder 4. The joint base is made of resin, wherein the 6 groups of pressing contact members are made of an elastic body, and the outer cylinder 5 is locked and connected to the inner cylinder 4 in the direction of ejection. Hose joint cap. (2) A utility model in which the above-mentioned 6 groups of press-contact elastic members are elastically deformed so as to fill the cavity between the outer peripheral surface of the soft part 2 and the inner surface of the outer cylinder 5 when the group is fixed to the hose A so as not to come off. A fitting cap for a resin hose according to registered claim 0.