JPH0637686U - Flexible pipe fittings - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a flexible pipe joint in which the sleeve mounted on the outer surface of the pipe does not fall off during the connection work. A pipe joint for connecting a flexible pipe whose outer surface is corrugated, wherein a sleeve made of a magnet having a tapered outer surface is engaged with the outer corrugated groove of the flexible pipe, and a rubber packing is provided in the corrugated groove at the tip of the flexible pipe. By inserting into a pipe mounting portion having an inner peripheral surface that compresses the packing on the inner surface of the end of the joint body, and screwing a push ring that engages with the end surface of the sleeve onto the joint body. A flexible pipe joint characterized in that the taper outer surface of the sleeve is engaged with the inner peripheral surface of the pipe mounting portion to fix the flexible pipe and seal by compression of the rubber packing. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a flexible pipe joint that can be easily connected to a flexible pipe used for a gas or water piping system at a piping site.

[0002]

[Prior art]

 Conventionally, a pipe joint of this type is disclosed in Japanese Utility Model Laid-Open No. 2-43590. As shown in FIG. 4, this pipe joint includes a sleeve 30 having a corrugated inner surface that engages with the outer surface of the flexible pipe 1 and slits in the axial direction, and a front end surface that abuts the rear end of the sleeve and is flexible. A nut 40 having an inner diameter capable of inserting the tube 1 and having a screw 49 on the front part, and a female screw 16 which is fitted into the sleeve 30 at the back side and is screwed into the thread 49 of the nut 40 at the inlet side. From the joint body 10 in which a large diameter hole is provided in the front part and a small diameter through hole 13 is provided in the back part and a stepped surface is formed between the large diameter hole and the tip of the flexible pipe. It is a flexible pipe joint.

[0003]

[Problems to be solved by the device]

 When joining the flexible pipes, the conventional flexible pipe joint described above splits the sleeve 30 having slits in the axial direction into two and opens the sleeve 30 larger than the outer diameter of the mountain portion of the flexible pipe 1 to engage with the outer surface of the pipe 1. I was wearing it. However, when the sleeve 30 is attached, the sleeve is completely separated into two pieces, and thus there is a problem that the sleeve is dropped and lost during connection.

The present invention solves the above problems that may occur when a flexible pipe is connected to a flexible pipe joint, and there is no fear that the sleeve mounted on the outer surface of the pipe will fall off during the connection work. The purpose is to provide.

[0005]

[Means for Solving the Problems]

 The gist of the present invention is a pipe joint for connecting a flexible pipe whose outer surface is corrugated, in which the outer corrugated groove of the flexible pipe is engaged with a sleeve made of a magnet having a tapered outer surface and the end of the flexible pipe is corrugated. Insert the rubber packing into the groove and insert it into the pipe mounting part that has an inner peripheral surface that compresses the packing on the inner surface of the end of the joint body, and screw the push ring that engages the end surface of the sleeve onto the joint body. By fitting, the taper outer surface of the sleeve is engaged with the inner peripheral surface of the tube mounting portion to fix the flexible tube, and the rubber packing is sealed by compression. It is a pipe joint.

[0006]

[Action]

 Since the present invention has the above configuration, when the sleeve is mounted, the sleeves are attracted by the action of the magnets and do not fall off the outer surface of the tube. Therefore, the pipe connection work becomes easy.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a joint for a flexible pipe according to an embodiment of the present invention, showing a state before the flexible pipe 1 is connected. First, the outer surface of the flexible tube 1 is coated with a suitable resin material, and the rubber packing such as the O-ring 5 is attached to the groove portion at the tip of the flexible tube 1 from which the resin coating of 3 to 4 peaks of the tip wave is removed. . The sleeve 6 is an Fe-Cr-Co type magnet that can be easily molded, has a corrugated inner surface that engages with the outer surface of the flexible tube 1, and is bisected in the axial direction as shown in FIG. Can be attached to the outer circumference of the flexible tube 1.

The outer peripheral surface of the sleeve 6 is a tapered outer surface 65, which is locked to the inner peripheral surface of the pipe mounting portion of the joint body 9 described later to fix the flexible pipe 1. The push ring 8 is made of brass, and has a locking surface 81 that contacts the rear end surface of the sleeve 6 and an internal thread 82 formed on the inner peripheral surface. The joint body 9 is made of bronze, and has a male thread 92 at one end that engages with the female thread 82 of the nut 8 and a taper male thread at the other end 93 for joining a device such as a faucet or another joint. Is provided. A pipe mounting portion 96 having an inner peripheral surface 94 having a diameter slightly smaller than the outer shape of the O-ring 5 is provided on the inner surface of the male screw 92 side, and a through passage 95 is provided on the taper male screw 93 side. . A step portion 97 is provided between the pipe mounting portion 96 and the through flow passage 95, and the O-ring 7 is fitted to the step portion 97.

The inlet side of the pipe mounting portion 96 is a taper inner surface 98, and this tapered inner surface 98 facilitates insertion of the O-ring 5 mounted in the outer peripheral groove of the end of the pipe, and the sleeve 6 causes the pressing ring 8 to move. When the taper is pressed against the main body 9 side with the taper inner surface 98, a proper surface pressure is generated on the outer surface of the flexible tube. Further, since the O-ring 5 mounted on the pipe is compressed to the smaller diameter side of the taper inner surface 98, the space between the pipe 1 and the pipe mounting portion 96 is surely sealed.

FIG. 3 is a diagram showing a state after connecting the flexible pipe 1 and the joint body 9 described above. That is, the internal thread of the push ring 8 and the external thread of the joint body 9 are tightened, the sleeve 6 and the flexible pipe 1 are advanced, and the end surface 83 of the push ring is screwed until it comes into contact with the end surface 99 of the joint body. . As shown in the figure, the tip of the flexible pipe 1 reaches the stepped portion 97 of the joint body and contacts the O-ring 7 mounted on the stepped portion 97. Therefore, the tip of the pipe 1 does not come into contact with the stepped portion 97 of the joint body, and is also sealed with the pipe 1 by the O-ring 7. Further, in the above embodiment, a female thread may be provided at the end of the joint body, and a screw may be provided on the push ring so as to be screwed.

[0011]

[Effect of device]

 In the flexible pipe joint of the present invention, the two sleeves mounted on the outer periphery of the pipe during connection work are attracted to each other by the action of the magnet and do not fall off the pipe. For this reason, it can be easily connected to a flexible pipe, and can reliably seal with the pipe to maintain a long-term sealing property.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a flexible pipe joint of the present invention before tightening.

FIG. 2 is a perspective view showing a sleeve according to an embodiment of the present invention.

FIG. 3 is a sectional view of the joint shown in FIG. 1 after tightening.

FIG. 4 is a cross-sectional view showing an example of a conventional flexible pipe joint.

[Explanation of symbols]

 1 Flexible tube 5 O-ring 6 Sleeve 7 O-ring 8 Push ring 9 Joint body

Claims (1)

[Scope of utility model registration request] 1. A pipe joint for connecting a flexible tube having an outer surface corrugated, wherein a sleeve made of a magnet having a tapered outer surface is engaged with the outer surface corrugated groove of the flexible tube and the distal corrugated groove of the flexible tube is engaged. Insert the rubber packing into the pipe mounting part that has an inner peripheral surface for compressing the packing on the inner surface of the end of the joint body, and screw the push ring that engages with the end surface of the sleeve into the joint body. Thus, the taper outer surface of the sleeve is engaged with the inner peripheral surface of the tube mounting portion to fix the flexible tube, and the flexible packing is sealed by the compression of the rubber packing. .