JP2004116649A - Flexible pipe joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe joint allowing a flexible pipe to be easily disconnected therefrom if required when the flexible pipe is fixedly inserted into the pipe joint. <P>SOLUTION: This flexible pipe joint comprises a lock cylinder 14 having a plurality of flexible pipe support pieces 16 formed in a funnel shape radially from an annular base plate to the center thereof, and a flexible pipe fixing means having a lock ring fixedly projected part 18 projectedly provided on the inner peripheral surface of the flexible pipe to position the lock ring 14 at a specified position in the flexible pipe insert space of a flexible pipe joint body 2 and a plug 4 screwed to the end of the body to fixedly press the annular base plate of the lock ring against the lock ring fixedly projected part 18. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible pipe joint for connecting a flexible pipe for guiding a fluid such as a gaseous liquid with one-touch operation, wherein the flexible pipe once connected can be easily removed.
[0002]
[Prior art]
The flexible pipe has a wavy vertical cross section, and a large diameter portion and a small diameter portion are repeated. The flexible pipe inserted into the pipe joint body has an inner periphery of a lock ring provided in the joint body. The engaging projection protruding from the surface is pushed open by the large-diameter portion, and the flexible-tube small-diameter portion is opposed to and abuts the engaging projection to prevent the flexible tube from being pulled out and fixed (for example, Patent Document 1). Therefore, means for contacting and fixing the engaging projection to the flexible pipe is required, and the structure is complicated, and it is also difficult to remove the flexible pipe from the pipe joint.
[0003]
[Patent Document 1]
Japanese Patent Application No. 2002-169679
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a pipe joint that can easily remove the flexible pipe from the pipe joint if necessary when a flexible pipe is inserted and fixed in the pipe joint.
[0005]
[Means for Solving the Problems]
The flexible pipe joint according to claim 1 has a lock ring having a plurality of flexible pipe support pieces provided radially and in a funnel shape from the annular substrate toward the center, and the lock ring is provided in a flexible pipe insertion space mainly composed of the flexible pipe joint. A lock ring locking projection protruding from the inner peripheral surface of the flexible pipe for positioning at the predetermined position of the flexible pipe, and the main body end for pressing and fixing the annular substrate of the lock ring against the lock ring locking projection. Flexible tube fixing means comprising a screwed plug is provided.
Further, the flexible pipe joint according to the second aspect is provided with a stepped portion which comes into contact with the tip of the inserted flexible pipe and an inner periphery which comes into contact with the outer peripheral surface of the flexible pipe at the innermost portion of the flexible pipe insertion space mainly composed of a tubular flexible pipe joint. A lock ring having a cylindrical seal packing having a surface, a plurality of radially and funnel-shaped flexible tube supporting pieces provided radially from the annular substrate toward the center near the entrance of the flexible tube insertion space; and A lock ring locking projection for positioning the ring at a predetermined position in the flexible pipe insertion space of the flexible fitting main body, and the main body end for pressing and fixing the lock ring base to the lock ring locking projection. And a flexible pipe fixing means comprising a plug screwed into the pipe.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a cross section of the flexible pipe joint 1 of the present invention. The main body 2 of the flexible pipe joint 1 has a cylindrical shape and is provided at one end with a screw portion 3 for screwing a conduit (not shown), and at the other end, a screw portion 5 for screwing a plug 4 described later. Have been. Inside the cylindrical main body 2, a packing receiver 6 in a direction perpendicular to the axis C is provided in a flange shape. The packing receiver 6 constitutes a cylindrical flow path 7 extending in the center in the direction of the axis CC. Reference numeral 8 denotes an annular packing for receiving an end of a conduit (not shown) screwed into the screw portion 3, reference numeral 9 denotes a seal packing provided to be fitted in the cylindrical flow path 7, which forms a substantially cylindrical body, and is mainly a pipe joint. 2 and provided internally. The inner circumference has a wavy bend 12 substantially corresponding to the wavy bend 11 of the flexible tube 10 so that the flexible tube 10 can be brought into close contact with the flexible tube 10 when it is inserted. The number of the wavy bends 12 may be small. The distal end of the flexible pipe 10 inserted into the seal packing 9 is in contact with a step 13 provided at the innermost part of the seal packing 9 in the wavy shape.
[0007]
Reference numeral 14 denotes a lock ring, which is formed in an annular thin plate shape in a side view as shown in FIG. 2, and has a number of flexible tube support pieces 16 protruding from the annular substrate 15 toward the axis C. Each support piece 16 has a small projection 17 at the top of the head, and has a slight space between adjacent support pieces 16. Each support piece 16 is bent by the insertion method of the flexible tube 10 as shown in FIG. It has a missing funnel shape.
[0008]
When the outer diameter of the annular substrate 15 is shorter than the inner diameter of the main body 2 of the flexible pipe joint 1, the lock ring 14 is inserted into the main body 2. The annular substrate 15 is brought into contact with the portion 18 so as to be positioned on an imaginary plane orthogonal to the axis CC.
[0009]
The interval between the small projections 17 on the opposing top of the annularly arranged support pieces 16 of the lock ring 14 is smaller than the diameter of the large diameter portion 19 of the flexible tube 10 and larger than the small diameter portion 20. The lock ring 14 positioned by the lock ring locking projection 18 is pressed and fixed by the plug 4 screwed to the main body 2 with the screw portion 5 of the main body 2. The plug 4 is formed of a cylindrical body, and a small projection 23 having a tapered surface 22 inclined in the direction of the axis CC is provided on the inner peripheral edge of the lock ring contact surface 21 at the tip of the cylindrical body. A screw portion 5 to be screwed with the screw portion 5 of the main body 2 is provided on the partial outer peripheral surface. 24 is a flange.
[0010]
When attaching the flexible pipe 10 to the flexible pipe joint 1 of the present invention, the flexible pipe 10 is inserted into the flexible pipe insertion space A from the plug 4 side of the flexible pipe joint 1 assembled as shown in FIG. The distal end of the flexible pipe 10 is cut at the small diameter portion 20, and the distal end first contacts the flexible pipe support piece 16 of the lock ring 14, and the support piece 16, which is opened in a funnel shape, is reduced in elasticity. Eject and push further. Then, the flexible tube 10 has the small diameter portion 20 and the large diameter portion 19 alternately passed through the support pieces of the lock ring 14, and the leading end is fitted into the seal packing 9. The seal packing 9 has a wavy bend 12 along the wavy bend of the flexible tube 10 at the inner peripheral portion thereof. Abut on the step 13. At this time, the movement of the seal packing 9 is prevented by the packing receiver 6 and the sealing property is enhanced.
[0011]
On the side shown in FIG. 1, the concave fitting portion 21 of the seal packing 9 is fitted at one place with the large diameter portion 19 of the flexible pipe 10. Since the length of the flexible pipe joint 1 can be reduced, the number and position of the concave portions of the seal packing 9 and the lock ring locking projection for fixing the lock ring 14 are determined based on the shape of the corrugated unevenness 11 of the flexible pipe 10. The position of the small pipe 18 should be determined in advance. As shown in FIG. 1, when the tip of the flexible pipe 10 comes into contact with the step 13 of the seal packing 9, the small projection 17 at the tip of the support piece 16 of the lock ring 14 is formed. Can come into contact with the vicinity of the small diameter portion of the flexible pipe 10.
[0012]
With the above configuration, the flexible tube 10 is in close contact with the step portion 13 and the wavy bend 12 of the seal packing 9 at the tip and the bent portion 11 thereof, and the flexible tube supporting piece 16 of the lock ring 14 is formed with a small projection at the tip. 17 is brought into contact with the vicinity of the small diameter portion 20 of the flexible tube 10 to sufficiently oppose a force in a direction in which the flexible tube 10 is to be pulled out.
[0013]
Even if the force in the pulling-out direction is applied to the flexible pipe supporting piece 16 and the flexible pipe supporting piece 16 having a cross-section of “C” is going to extend linearly, the tapered surface 22 of the small projection 23 of the plug 4 causes the supporting piece 16 to extend. Accordingly, the support piece 16 acts to prevent the extension of the support piece 16.
[0014]
To remove the flexible pipe joined to the flexible pipe joint 1 as follows. By appropriately applying a tool to the flange 24 of the plug 4, rotating around the axis C-C to loosen the screw portion 5 and removing the plug 4 from the main body 2 of the flexible pipe joint 1, the lock ring 14 becomes the main part of the lock ring 14. The second lock ring engaging projection 18 is released from the pressing force. Therefore, if the flexible tube 10 is pulled rightward in FIG. 1, the lock ring 14 is also pulled rightward through the support piece 16 in which the small projection 17 at the tip is in contact with the small diameter portion 20 of the flexible tube 10. He is taken out of the subject 2. The seal packing 9 fitted to the distal end of the flexible tube 10 also moves rightward as the flexible tube 10 moves, but stops at that position without further movement due to contact with the lock ring locking projection 18. Only the flexible tube 10 comes off the seal packing 9 and is removed from the main body 2.
[0015]
【The invention's effect】
The flexible pipe joint of the present invention, since the flexible pipe fixing means provided in the flexible pipe insertion space in the main body is fixed to the main body by a plug screwed to the main body end, when the flexible pipe is pulled out from the flexible pipe joint, By removing the plug, the flexible pipe fixing means can be released, and the flexible pipe can be easily removed from the flexible pipe joint, which has not been able to remove the flexible pipe conventionally.
[Brief description of the drawings]
FIG. 1 is an overall longitudinal sectional front view of the flexible pipe joint of the present invention.
FIG. 2 shows a lock ring, in which A is a side view, and B is a cross-sectional view of A taken along the line BB.
FIG. 3 shows a plug, wherein A is a partially cutaway front view, B is a right side view of A, and C is a left side view of A.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Flexible pipe joint 2 Flexible pipe joint main body 3,5 Screw part 4 Plug 6 Packing receiver 7 Flow path 8 Packing 9 Seal packing 10 Flexible pipe 11,12 Wavy bending 13 Step part 14 Lock ring 15 Ring substrate 16 Flexible pipe support piece 17 Small projection 18 Projecting part 19 Large diameter part 20 Small diameter part 21 Recessed fitting part 22 of seal packing 22 Tapered surface 23 Small projection 24 Flange A Flexible insertion space

Claims (2)

A lock ring having a plurality of flexible tube support pieces provided radially and in a funnel shape toward the center from the annular substrate, and a flexible ring for positioning the lock ring at a predetermined position in a flexible pipe insertion space mainly composed of a flexible pipe joint. A flexible structure comprising a lock ring locking projection protruding from the inner peripheral surface of the pipe, and a plug screwed to the main body end for pressing and fixing the annular substrate of the lock ring against the lock ring locking projection. Flexible pipe joint having pipe fixing means. A tubular seal packing having a stepped contact with the tip of the inserted flexible pipe and an inner peripheral surface in contact with the outer peripheral surface of the flexible pipe is provided at the innermost part of the flexible pipe insertion space mainly composed of a flexible pipe joint having a cylindrical shape. A lock ring having a plurality of flexible pipe support pieces radially and funnel-shaped from the annular substrate toward the center near the entrance of the flexible pipe insertion space; and a flexible pipe insertion space mainly comprising a flexible pipe joint. A flexible pipe comprising a lock ring engaging projection for positioning at a predetermined position in the inside, and a plug screwed to the main body end for pressing and fixing the lock ring base to the lock ring engaging projection. Flexible pipe joint provided with fixing means.

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