JP6360096B2 - Fastener for pipe connection - Google Patents

Description

  The present invention relates to a pipe connecting fastener that prevents pipes from coming out across both sides of a pipe connecting portion.

  Generally, a pipe connection fastener is attached to a pipe connection portion so as to straddle both sides of the pipe connection portion, thereby preventing the pipe from coming out of the connection portion (for example, Patent Document 1).

  The fastener for pipe connection (sub-cylindrical body) described in Patent Literature 1 is arranged with a plurality of stoppers arranged in the circumferential direction and urged in the central direction by a rubber elastic body as an urging member, Key portions that engage with pipes on both sides (the cylindrical main body of the second member, the first member) are formed on the distal end side and the distal end side of the stopper portion.

  By engaging the key part on the end side with one pipe (the cylindrical main body of the second member) and mounting the pipe connecting fastener so that it cannot be removed, the other pipe (first member) is inserted into these pipes. The distal end side of the stopper portion is elastically deformed outward in the radial direction, and the key portion on the distal end side engages with the other pipe (first member), thereby preventing the pipe from coming out and the pipe connecting fastener from falling off.

Japanese Utility Model Publication No. 3-121292 (from the bottom of page 12 to the first line to page 14, the second line, page 14, line 13 to page 15, the first line, FIGS. 1 to 3)

  However, although the pipe connecting fastener of Patent Document 1 has a key portion formed on the distal end side and the distal end side of the stopper portion, it is the stopper that is elastically deformed and engaged with the piping when the piping is inserted. It is only the front end side of the portion, and the end side of the stopper portion cannot be easily elastically deformed, and it is not easy to engage the pipe so as not to drop off.

  An object of this invention is to provide the fastener for pipe connection which can be easily and cannot be attached to the connection part of piping.

  In order to achieve the above object, the fastener for pipe connection according to the present invention prevents the pipe from coming out across both sides of the pipe connection portion, and a support ring arranged around the connection portion, A plurality of elastically deformable arms projecting from the support ring in the pipe line direction, the plurality of arms projecting from the support ring to both sides in the pipe line direction and engageable with pipes on both sides.

  According to the said structure, since the support ring distribute | arranged to the circumference | surroundings of a connection part is provided, drop-off | omission of the fastener for pipe connection from the connection part of piping can be prevented. In addition, since a plurality of arms project from the support ring on both sides in the pipeline direction and the arms on both sides can be elastically deformed, the arms can be elastically deformed and easily engaged with the pipes on both sides. The connecting fastener can be easily and non-detachably attached to the connecting portion of the pipe to prevent the pipe from coming out.

  Further, the support ring may be formed in a zigzag shape in which the arm is elongated by retreating the base end of the arm in the pipe line direction.

  According to this configuration, the arm is lengthened by forming the support ring in a zigzag shape and retracting the base end of the arm in the pipeline direction, so that the arm can be easily elastically deformed without reducing the strength of the arm. be able to.

  As described above, according to the present invention, the support ring is arranged around the connection portion, and a plurality of arms that can be elastically deformed on both sides in the pipeline direction are projected from the support ring so as to be engaged with the pipes on both sides. I have to.

  Accordingly, the plurality of arms can be elastically deformed and engaged with the pipes on both sides, and the pipe connecting fastener can be easily and non-detachably attached to the pipe connecting portion. In addition, since the pipe connection fasteners cannot be removed, the pipe connection fasteners can be installed incorrectly without attaching them again to the wrong part of the pipe after installing them in the proper position. Can be prevented.

The side view of the connection part of piping equipped with the fastener for pipe connection concerning the present invention AA sectional view of FIG. 1 is a longitudinal sectional view of FIG. Perspective view of fastener for pipe connection Side view of pipe connection disassembly FIG. 7 is a longitudinal sectional view.

  Hereinafter, the form for implementing the fastener for pipe connection concerning the present invention is explained using a drawing.

  As shown in FIGS. 1 to 4, the pipe connecting fastener 1 prevents the pipes 2 a and 2 b from coming out across both sides of the connection part 3 of the pipes 2 a and 2 b, and is arranged around the connection part 3. And a plurality of elastically deformable arms 5a and 5b projecting from the support ring 4 in the pipeline direction. The plurality of arms 5a and 5b are provided on both sides in the pipeline direction from the support ring 4. It protrudes and engages with the pipes 2a and 2b on both sides.

  As shown in FIGS. 1, 2, 5, and 6, pipe joints 6 a and 6 b are provided at the distal ends of the pipes 2 a and 2 b, and the distal end portion 8 of the pipe joint 6 a is connected via an O-ring 7. By inserting the pipe joint 6b, the pipes 2a and 2b are connected via the pipe joints 6a and 6b.

  Of the pipe joints 6a and 6b provided at the distal ends of the pipes 2a and 2b, the pipe joint 6a has an annular groove 9a formed on the outer peripheral surface of the proximal end side of the distal end portion 8, and the pipe joint 6b has its An annular groove 9b is formed on the outer peripheral surface of the tip. The step surface 10 between the distal end portion 8 and the proximal end side of the pipe joint 6a contacts the distal end surface 11 of the pipe joint 6b when the distal end portion 8 of the pipe joint 6a is inserted into the pipe joint 6b. The amount of insertion is limited, and the connecting portion 3 is formed at the contact portion between the step surface 10 and the tip surface 11.

  The support ring 4 is made of, for example, a synthetic resin, and has a cylindrical shape having an inner diameter slightly larger than the outer diameter of the connection portion 3 as a whole. Composed. The plate constituting the support ring 4 is set to have a plate width and a plate thickness sufficient to increase rigidity in comparison with the arms 5a and 5b.

  The arms 5a and 5b are made of, for example, a synthetic resin and are formed into a narrow rod shape having the same thickness as the plate constituting the support ring 4, and each of the arms 5a and 5b recedes in a zigzag pipe line direction on both sides of the support ring 4. It forms integrally with the support ring 4 so that it may be located in a site | part. The arms 5a and 5b are continuous with the support ring 4 at the base ends, and the front end surface is set to be flush with the portion of the support ring 4 that protrudes in the pipe line direction. Engaging claws 12 that protrude inward in the radial direction and engage with the annular grooves 9a and 9b of the pipe joints 6a and 6b are formed.

  By forming the base ends of the arms 5a and 5b by retreating in the pipeline direction, the arms 5a and 5b are set to a sufficient length without protruding the tip from the zigzag protruding portion. While 5b is set to a cross-sectional dimension necessary for obtaining sufficient strength, it is easily elastically deformed.

  When the pipe joints 6a and 6b are pushed into the inner side of the pipe connection fastener 1, the engagement claw 12 is formed with a tapered surface 13 that comes into contact with the end faces thereof, and the arms 5a and 5b are elastically deformed to form the pipe joint 6a. , 6b is allowed to be pushed. When the distal ends of the elastically deformed arms 5a and 5b reach the annular grooves 9a and 9b of the pipe joints 6a and 6b, the engaging claws 12 are engaged with the annular grooves 9a and 9b by the restoring force thereof, and the pipe joint 6a , 6b attached to the pipes 2a and 2b are prevented from coming out.

  According to the above configuration, since the cylindrical support ring 4 is arranged around the connection portion 3, it is possible to prevent the pipe connection fastener 1 from falling off, and the pipe joint while elastically deforming the arms 5 a and 5 b. By simply pushing in 6a and 6b, the pipe connecting fastener 1 can be easily mounted.

  Further, after engaging the engaging claws 12 of the arms 5a and 5b with the annular grooves 9a and 9b, the pipe connecting fastener 1 cannot be easily removed, so that the pipe joint 6a at the tip of the pipes 2a and 2b, The pipe connecting fastener 1 attached to the regular position 6b is not removed. Thereby, it is possible to prevent the pipe connection fastener 1 from being erroneously attached to an erroneous part during connection work of the pipe joints 6a and 6b.

In addition, this invention is not limited to said embodiment, A change can be suitably added within the scope of the present invention. For reference , the support ring 4 is not limited to a zigzag shape but may be a simple ring shape or a cylindrical shape.

DESCRIPTION OF SYMBOLS 1 Pipe connection fastener 2a, 2b Piping 3 Connection part 4 Support ring 5a, 5b Arm 6a, 6b Pipe joint 7 O-ring 8 Tip part 9a, 9b Annular groove 10 Step surface 11 Tip surface 12 Engagement claw 13 Tapered surface

Claims (1)

A fastener for pipe connection that prevents the pipe from coming out across both sides of the pipe connection part, and a support ring disposed around the connection part and elastically deformable protruding from the support ring in the pipe line direction A plurality of arms, the plurality of arms projecting from the support ring to both sides in the pipe line direction so as to be engageable with pipes on both sides, and the support ring is retracted from the base end of the arm in the pipe line direction A fastener for pipe connection, characterized in that it is formed in a zigzag shape to lengthen the arm .

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