JPH0626794Y2 - High pressure hose fitting - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is an improvement of a high-pressure hose joint used for connecting a pressure-resistant hose through which pressurized oil of high pressure such as several hundred kg / cm ² flows. It is about.

[Prior Art] As a hose joint for such a flow path of pressurized oil of a considerably high pressure, a hose with an outer cylinder part that can be crimped to both ends of the joint pipe by drawing processing to the connection end of the pressure resistant hose A so-called outer cylinder drawing type having a connecting tool (base) is commonly used.

[Problems to be solved by the invention]

However, this outer-cylinder-drawing type high-pressure hose joint has a problem that it is difficult to use in a narrow place because a considerably large hydraulic drawing machine is required for drawing the outer cylinder.

Therefore, the main purpose of the present invention is to provide a high-pressure hose joint that is easy to use even in a narrow space.

[Means for solving problems]

According to this invention, the above-mentioned object is
It has a large diameter part that the connection end surface of the pressure hose can come into contact with, and on both sides of the large diameter part, a plurality of rubber-like curable sealant (sealant) annular recesses are axially spaced on the outer circumference. A joint tube having a tapered hose insertion part that is formed, and a pressure-resistant hose that is inserted into each hose insertion part of the joint tube that is axially spaced on the inner surface (locks out) ) A pair of tapered hose grippers having a large number of engageable protrusions (projections), and a tapered insertion hole that can be press-fitted to the outer periphery of the hose gripper and is inserted into one hose gripper. A screwless holder with an outward flange on the outer periphery of the large diameter side of the mounting hole, and a tapered insertion hole that can be press-fitted to the outer periphery of the hose gripper that is inserted into the other hose gripper, and the insertion hole Outer peripheral part of large diameter side , A threaded holder having a male thread portion of larger outer diameter than the outward flange-free screw holder,
High pressure consisting of an inward flange at one end that can abut the outward flange of the screwless holder, and a tightening sleeve at the other end that has a screw hole that engages with the external thread of the threaded holder Achieved by hose fittings.

Here, as the rubber-like curable sealing agent to be filled in the annular recess of the hose insertion portion of the joint pipe, a polyurethane adhesive is particularly suitable, and a rubber adhesive such as butyl rubber, polysulfide, silicone rubber is also used. It is possible.

[Action]

In the high-pressure hose joint according to the present invention, first, a tightening sleeve and a screwless holder are mounted in advance so that the former inward flange and the latter outward flange can come into contact with each other adjacent to the connecting end of one pressure hose. With a threaded holder inserted into the adjacent end of the connection end of the other pressure-resistant hose, the outer circumference including the rubber-like curable sealant filling annular recess of each hose insertion part of the joint pipe. Apply a large amount to almost the entire portion, and then insert the connecting end of each pressure-resistant hose into each hose insertion portion until each connecting end face contacts the opposite side faces of the large diameter part.

After that, with the split gripper in contact with the connection end of each pressure-resistant hose, guide the screwless holder and the screwed holder onto the split gripper, hold each split gripper, and then screw the screw hole of the tightening sleeve. By engaging the male thread of the holder with a screw and rotating the tightening sleeve around the shaft with an appropriate tool such as a wrench, the screwless holder and screw With the holders brought close to each other, each split gripper is pressed against the opposing pressure-resistant hoses, whereby the connecting end of each pressure-resistant hose is directly attached to the opposing hose insertion portion of the joint pipe, except substantially in the annular recess. The annular recess is used in the form of pressure contact with a rubber-like curable sealing agent.

〔Example〕

 The drawings show an embodiment of the present invention.

In this illustrated example, the large-diameter portion with which the connection end surface of the pressure-resistant hose 60 at the central portion in the longitudinal direction of the joint pipe 10 can come into contact is formed as an outward flange 12, and has a taper extending on both sides of the central portion. The annular recesses 16 formed at the outer peripheral portion of the hose insertion portion 14 at intervals in the axial direction have a shape in which the vertical cross section has a taper shape.

The pair of tapered split grippers 20 are divided into two equal parts around the axis, and each divided part extends from the large diameter side end part to the axially intermediate part at the central part in the axial direction. A slit 24 is formed. The ridge 22 on the inner surface of the split gripper 20 extends in a spiral shape in the axial direction in the shape of a screw thread so that the crest is directed toward the large diameter side at an angle of substantially a right angle or less at the portion excluding the tip. .

In addition, the mounting holes 32, 42 for the screwless holder 30 and the screwed holder 40
The taper of each is substantially the same as the taper of the outer peripheral portion of the split gripper 20, and the outer peripheral portion is formed in a step shape with the outward flange 34 and the male screw portion 44 having a slightly larger diameter than this as the maximum diameter portion. I am doing it.

Further, the hole portion including the screw hole 54 of the tightening sleeve 50 having the inward flange 52 at one end has a diameter slightly larger than that of the outward flange 34 of the screwless holder 30, and the screw hole 34 has the other end portion. To an intermediate portion in the axial direction.

The joint tube 10, the pair of split grippers 20, the screwless holder 30, the threaded holder 40, and the tightening sleeve 50 having the above-described configuration are provided on the entire hose insertion portion 14 including the annular recess 16 of the joint tube 10. After applying a large amount of the rubber-like curable sealing agent 18 made of polyurethane adhesive, connect the connecting end of the pressure-resistant hose 60 through which pressurized oil of several hundred kg / cm ² flows, and the connecting end face is an outward flange. Inserted into the hose insertion part 14 until it comes into contact with 12, sandwiching the work to make a state in which a small amount sticks out before and after the hose insertion part 14 at the same time when the sealing agent 18 is sealed in the annular recess 16 part, When assembled and used as shown, it was confirmed that there was no oil leakage.

[Advantage of the Invention] According to the high-pressure hose joint of the present invention, the pressure-resistant hose can be connected substantially only by using a tightening sleeve rotating tool such as a spanner having a small operation space. Therefore, this high pressure hose joint can be easily used even in a narrow space.

[Brief description of drawings]

The drawing is a longitudinal sectional view of an embodiment of the high-pressure hose joint according to the present invention in use. 10 …… fitting tube, 12 …… outward flange, 14 …… hose insertion part, 16 …… annular recess, 18 …… sealing agent, 20…
… Split gripper, 22 …… Projection, 30 …… Screwless holder, 32
...... Tapered insertion hole, 40 …… Screw holder, 42 ……
Tapered insertion hole, 44 …… Male thread, 50 …… Tightening sleeve, 52 …… Inward flange, 54 …… Screw hole, 60 ……
Pressure hose.

Claims (2)

[Scope of utility model registration request] 1. A large-diameter portion at a central portion in the axial direction with which a connecting end face of a pressure-resistant hose can come into contact, and a plurality of rubber-like members are provided on both sides of the large-diameter portion at axial intervals in the outer peripheral portion. A joint pipe having a tapered hose insertion part that forms an annular recess for filling the curable sealant, and a pressure resistance that is inserted into each hose insertion part of the joint pipe that is axially spaced on the inner surface part. A pair of tapered hose grippers having a large number of protrusions that can be locked and engaged with the outer peripheral portion of the hose, and a tapered insertion hole that is press-fitted to the outer peripheral portion of the hose gripper and is inserted into one of the hose grippers. , A screwless holder having an outward flange on the outer circumference on the large diameter side of the insertion hole, and a tapered insertion hole that can be press-fitted to the outer circumference of the hose gripper and is attached to the other hose gripper. On the outer periphery of the large diameter side of the hole, A holder with a screw having a male screw portion having an outer diameter larger than the outward flange of the screw holder, and an inward flange that can abut the outward flange of the screwless holder at one end, and the other end side, A high-pressure hose joint consisting of a tightening sleeve having a screw hole portion that engages with the male screw portion of a threaded holder. 2. A high-pressure hose joint according to claim (1), wherein the rubber-like curable sealing agent with which the annular recess of the hose insertion portion of the joint pipe is filled is a polyurethane adhesive.