JPH035752Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a metal flexible tube.

[Conventional technology]

Conventionally, metal flexible tubes are made by fitting the end of a metal corrugated tube into one end of a fitting, and welding the end of the corrugated tube and the fitting to form a sealed integral body. In order to prevent elongation, the wire braided tube is covered with a covering material as necessary, and the end of this wire braided tube is also welded to the fitting.

[The problem that the idea attempts to solve]

For this reason, welding of the corrugated pipe and the joint fittings takes time and effort, and the cost of the product is high. In addition, the heat generated during welding affects the material of the corrugated pipe, etc.

[Means to solve the problem]

The present invention was made to achieve the above object, and consists of a cylindrical gasket fitted onto a joint fitting with a ring groove formed on the outer periphery, and a corrugated tube end covered with a covering material. part is fitted onto the outer periphery of this packing, a fixing metal fitting is fitted onto this outer periphery, the holding cylinder part of this holding metal fitting is squeezed on the outer peripheral surface of the ring groove of the joint metal fitting to form an integral part, and the fixing cylinder part is The gist is that it is crimped directly onto the ring groove of the fitting.

〔Example〕

The present invention will be explained below based on the illustrated embodiments.

In the figure, reference numeral 1 denotes an annular corrugated tube made of metal such as stainless steel, copper, or aluminum.

Reference numeral 2 denotes a cylindrical covering material that is fitted onto the outer peripheral surface of the annular corrugated tube 1, and is made of a synthetic resin tube, wire braid, etc., and prevents the corrugated tube 1 from elongating in the axial direction, making it suitable for use as a flexible tube. It has a pressure resistance of

Reference numeral 3 denotes a fitting, which has a female type with a cap nut and a male type with a bolt shape as shown in the figure, and is used as appropriate. A plurality of ring grooves 31, 32, 33 are carved on the outer circumferential surface of the ring groove, and a required interval is provided between each ring groove. A locking piece 34 is used.

Reference numeral 4 denotes a fixing fitting, and the fixing fitting 4 is shaped like a metal pipe, and has a shape in which a small-diameter fixing cylinder part 41 is protruded from the tip of a large-diameter holding cylinder part 42. The inner diameter of the holding cylinder portion 42 is such that the covering material 2 is fitted therein.

5 is a packing made of synthetic resin, rubber, or other elastic material that is fitted around the outer periphery of the joint fitting 3;
It has a short tubular shape that is fitted inside the annular corrugated pipe 1.

Reference numeral 6 denotes a cap nut, which is normally used for joining flexible tubes, and is rotatably locked to the cap nut locking piece 34 of the joint fitting 3.

As mentioned above, the parts of the metal flexible tube of the present invention consist of the annular corrugated tube 1, the covering material 2, the joint fitting 3, the fixing fitting 4, the packing 5, and the cap nut 6. As shown in the figure.

Next, the order of assembling these parts into the configuration shown in FIG. 1 will be explained.

First, the packing 5 is fitted onto the pipe-shaped joint fitting 3, and then the annular corrugated tube 1 with the covering material 2 fitted on the outside is fitted onto the outer periphery of the packing 5. At this time, the end of the annular corrugated tube 1 has been stretched in advance into a straight tube shape, and is easily fitted onto the packing 5. Next, the fixing fitting 4 is fitted onto the joint fitting 3 so as to fit around the outer periphery of the annular corrugated pipe end, and the fixing fitting 4 is fitted onto the outer periphery of the holding cylinder part 42 and the fixing cylinder part 41 of the fixing fitting, and the ring groove 3 , 32, 33 are squeezed to form ring grooves 31, 33 as shown in FIG.
In addition, the annular corrugated tube end, the covering material, and the holding cylinder are bent and fixed so that a part of the packing is inserted into 32 and 33, so that they become integral.

Next, insert the cap nut 6 into the end of the joint, expand the end of the joint, and tighten the cap nut 6 as shown in FIG.
is attached to the joint fitting 3.

[Effect of idea]

According to the present invention, a cylindrical packing is fitted onto a joint fitting having a ring groove formed on the outer periphery, and the end of the corrugated pipe, which is a metal annular corrugated pipe covered with a covering material, is fitted into the outer periphery of the fitting. A fixing metal fitting is fitted onto the outer periphery, the holding cylinder part of the holding metal fitting is squeezed on the outer peripheral surface of the ring groove of the fitting fitting to form an integral part, and the fixing cylinder part is directly crimped onto the ring groove of the fitting fitting. As a result, corrugated pipes can be easily fixed watertight without welding, and costs can be reduced.
Furthermore, it has the advantage that it is possible to avoid the influence of heat on the material, and that it is possible to securely fix the corrugated pipe without damaging it, and to obtain a product with high precision.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional front view of the upper half, and FIG. 2 is an exploded front view. 1 is an annular corrugated pipe, 2 is a covering material, 3 is a fitting,
31, 32, 33 are ring grooves, 4 is a fixing metal fitting, 4
1 is a fixed cylinder part, 42 is a holding cylinder part, 5 is a packing,
6 is Fukuronatsu.

Claims (1)

[Scope of utility model registration request] A cylindrical packing is fitted onto a fitting with a ring groove formed on the outer periphery, and the end of the corrugated pipe, which is a metal annular corrugated pipe covered with a covering material, is fitted into the outer periphery of the fitting, and a fixing fitting is attached to the outer periphery. A metal flexible tube that is fitted onto the outside, the holding cylinder of the fixing fitting is squeezed onto the outer peripheral surface of the ring groove of the fitting, and the fixing cylinder is directly crimped onto the ring groove of the fitting. .