JP2017187072A - Fastener for pipe connection - Google Patents

Abstract

Provided is a fastener for pipe connection that can more reliably prevent the pipe from coming off from a connection portion.
A C-shaped fastener body 4 is mounted from the side of a connecting portion 3. The fastener body 4 is engaged with the pipes 2a and 2b on both sides. The locking cover 6 covers the C-shaped opening 5 of the fastener body 4. The both ends of the fastener body 4 are locked by the locking cover 6. The locking cover 6 prevents the opening 5 of the C-shaped fastener body 4 from spreading. The locking cover 6 is engaged with the pipes 2 a and 2 b on both sides of the connection portion 3. The external force received by the locking cover 6 is received by the pipes 2a and 2b.
[Selection] Figure 2

Description

  The present invention relates to a pipe connecting fastener that is arranged around a connection part while straddling both sides of the connection part of the pipe to prevent the pipe from coming out.

  In general, a pipe connecting fastener used for connecting pipes has, for example, a structure in which a band-shaped metal member having elasticity is bent and formed in a substantially C shape. By engaging with the flange, it functions to prevent the pipe from coming off from the connecting portion.

  However, a pipe connecting fastener that is simply formed by bending a metal member into a substantially C shape is elastically deformed so that its C-shaped open portion expands when a force is applied from the outside, and from the connecting portion. There is a risk of falling off.

  On the other hand, Patent Document 1 is attached so as to straddle the opening end of the clip (fastener), and the expansion preventing walls at both ends are brought into contact with the opening end of the clip so as to prevent the clip from expanding. A protective cover is disclosed.

JP-A-8-028770 (paragraph numbers 0005 and 0014, FIGS. 1 to 6)

  However, the retaining cover of Patent Document 1 is simply mounted so as to straddle the opening of the fastener, and when the retaining cover receives a force from the outside, first, the retaining cover is detached from the fastener. By doing so, there is a possibility that the fastener may fall off from the connection portion of the pipe.

  An object of this invention is to provide the fastener for pipe connection which can prevent more reliably the fall from the connection part of piping.

  In order to achieve the above-mentioned object, the fastener for pipe connection according to the present invention is arranged around the connection part while straddling both sides of the connection part of the pipe to prevent the pipe from coming out and connected. A C-shaped fastener body that is mounted from the side of the part and engages the pipes on both sides, and a locking cover that covers the C-shaped opening of the fastener body and that locks both ends of the fastener body, The locking cover can be engaged with piping on both sides of the connecting portion.

  According to the above configuration, since both ends of the fastener body are locked by the locking cover, the opening portion of the C-shaped fastener body is prevented from spreading, and the pipe connection fastener is prevented from falling off from the pipe connection portion. can do.

  Further, since the locking cover is engaged with the pipes on both sides of the connecting portion, even if the locking cover receives a force from the outside, the force is applied to the pipe so that the locking cover is detached from the fastener body. Therefore, it is possible to more reliably prevent the pipe connecting fastener from falling off. Moreover, since the locking cover is directly engaged with the pipe, the force received by the locking cover can be transmitted to the pipe without going through the fastener body, and the fastener body is easily deformed and the locking cover easily falls off. Can be prevented.

  Furthermore, in addition to the C-shaped fastener main body, by engaging a locking cover that covers the open portion with the pipe, the pipe connecting fastener is engaged with the pipes on both sides over the entire circumference of the connecting part. It is possible to improve the function of preventing the pipe from coming out by the pipe connecting fastener. In addition, since the pipe connecting fastener is mounted so as to surround the entire circumference of the connecting portion, it is possible to prevent the pipe connecting fastener from being erroneously mounted to a portion of the pipe having a different diameter.

  Further, the locking cover may be engageable with the pipes on both sides of the connecting portion in the vicinity of both ends in the fastener circumferential direction.

  According to this configuration, since the vicinity of both ends of the locking cover is engaged with the pipe, the locking cover can be stably supported against the force received from the outside. It is possible to more reliably prevent the pipe connecting fastener from falling off due to dropping off.

  In addition, as a specific configuration for arranging pipe connection fasteners around the connection part of the pipe to prevent the pipe from coming out, the fastener body is provided with annular projections adjacent to each other at the connection part on the outer peripheral surface of the pipe. A configuration in which a pair of main body side engaging portions are provided so as to sandwich two adjacent annular projections, and a cover side engaging portion is provided on the locking cover so as to sandwich adjacent two annular projections. it can.

  As described above, according to the present invention, both ends of the C-shaped fastener body are locked by the locking covers, and the locking covers are engaged with the pipes on both sides of the connecting portion. As a result, it is possible to prevent the locking cover from falling off from the fastener body and prevent the pipe connecting fastener from falling off while enhancing the function of preventing the pipe from being pulled out by the pipe connecting fastener. Pull-out can be prevented more reliably.

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 It is the perspective view of a fastener main part, (a) is the figure seen from the outside, (b) is the figure seen from the inside Locking cover perspective view, (a) is a view from the outside, (b) is a view from the inside 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 6, the pipe connecting fastener 1 is arranged around the connecting part 3 while straddling both sides of the connecting part 3 of the pipes 2 a and 2 b to prevent the pipes 2 a and 2 b from coming out. There is a C-shaped fastener body 4 that is mounted from the side of the connecting portion 3 and engages the pipes 2a and 2b on both sides, and covers the C-shaped opening 5 of the fastener body 4 and engages both ends of the fastener body 4. The locking cover 6 is provided to be stopped, and the locking cover 6 is engaged with the pipes 2 a and 2 b on both sides of the connecting portion 3.

  As shown in FIGS. 1, 2, 7, and 8, pipe joints 7 a and 7 b are provided at the distal ends of the pipes 2 a and 2 b, and the distal end portion 9 of the pipe joint 7 a is connected with an O-ring 8 interposed therebetween. By inserting the pipe joint 7b, the pipes 2a and 2b are connected via the pipe joints 7a and 7b.

  Of the pipe joints 7a and 7b provided at the distal ends of the pipes 2a and 2b, the pipe joint 7a has an annular protrusion 10a formed on the outer peripheral surface of the proximal end side of the distal end portion 9, and the pipe joint 7b has its An annular protrusion 10b is formed on the outer peripheral surface of the tip. When the tip 9 of the pipe joint 7a is inserted into the pipe joint 7b, the annular protrusions 10a and 10b limit the amount of insertion of the pipe joint 7a adjacent to each other, and the connecting part 3 between the annular protrusions 10a and 10b. Configure.

  The fastener body 4 is made of, for example, a synthetic resin having elasticity, and is provided with two C-shaped main body side engaging portions 11 having a rectangular cross section, and an end connecting portion 12 and a central connecting portion at both ends and the center thereof. 13 is connected. By attaching the fastener body 4 to the connection portion 3, the two body side engaging portions 11 forming a pair are positioned so as to sandwich the adjacent two annular projections 10a and 10b, and the fastener body 4 is connected to the pipes on both sides. 2a and 2b are engaged.

  Locked claws 14 projecting outward are formed at both ends of the fastener body 4, and both ends of the fastener body 4 are locked by the locking cover 6, thereby expanding the opening 5 of the fastener body 4. By being regulated, the fastener main body 4 is prevented from falling off from the connecting portion 3 of the pipes 2a, 2b.

  The end connecting portion 12 and the central connecting portion 13 are formed thinner than the main body side engaging portion 11, and connect the portions of the main body side engaging portion 11 that are displaced to the outside, and the main body side engaging portion 11. When engaged with both sides of the annular protrusions 10a and 10b, the annular protrusions 10a and 10b are straddled. Of the thin end connecting portion 12 and the central connecting portion 13, the end connecting portion 12 is reinforced by a locked portion 14 that protrudes outward, and the central connecting portion 13 is a central reinforcing portion 15 formed outside thereof. It is reinforced by.

  The locking cover 6 is made of, for example, a synthetic resin having elasticity, and has a structure in which two bow-shaped strips 16 are juxtaposed and both ends thereof are connected by end connecting portions 17 having the same thickness as the strips 16. It is said. Locking claws 18 projecting inward from the end connecting portion 17 are formed at both ends of the locking cover 6. The locking claws 18 are locked to the locked claws 14 of the fastener body 4, and the fastener body Both ends of 4 are locked.

  A total of four cover-side engaging portions 19 are provided in the vicinity of both ends of the locking cover 6 in the fastener circumferential direction and in the center side of the end connecting portion 17. The two pairs of cover-side engaging portions 19 are positioned so as to sandwich the two adjacent annular protrusions 10a and 10b by attaching the locking cover 6 so as to lock both ends of the fastener body 4. 6 near both ends engages with pipes 2a and 2b on both sides.

  According to the above configuration, the fastener body 4 is engaged with the annular protrusions 10a and 10b, and both ends of the fastener body 4 are locked with the locking covers 6, and the locking cover 6 is also locked with the annular protrusions 10a and 10b. It is made to engage with. Thus, the C-shaped fastener body 4 can be prevented from being deformed so as to open and falling off, and the function of preventing the pipes 2a and 2b from coming out by the pipe connecting fastener 1 can be enhanced.

  Further, by engaging the locking cover 6 with the annular protrusions 10a and 10b, even if the locking cover 6 receives a force from the outside, the force can be transmitted directly to the annular protrusions 10a and 10b. The stop cover 6 can be prevented from falling off. Further, even when the pipe connecting fastener 1 is formed of a flexible synthetic resin, the pipe connecting fastener 1 is mounted so as to surround the entire circumference of the connecting portion 3, so that it can be prevented from being erroneously mounted to parts having different diameters. .

  In addition, this invention is not limited to said embodiment, A change can be suitably added within the scope of the present invention. For example, the cover side engaging portion 19 can be provided not only near both ends of the locking cover 6 but also near the center.

DESCRIPTION OF SYMBOLS 1 Pipe connection fastener 2a, 2b Piping 3 Connection part 4 Fastener main body 5 Opening part 6 Locking cover 7a, 7b Pipe joint 8 O-ring 9 Tip part 10a, 10b Annular protrusion 11 Main body side engaging part 12 End connection part 13 Center Connecting portion 14 Claw 15 to be locked 15 Central reinforcing portion 16 Strip plate 17 End connecting portion 18 Locking claw 19 Cover side engaging portion

Claims (3)

  A fastener for pipe connection that is arranged around the connection part while straddling both sides of the connection part of the pipe to prevent the pipe from coming out, and is attached from the side of the connection part and engages with the pipes on both sides. A C-shaped fastener body and a locking cover that covers the C-shaped opening of the fastener body and that locks both ends of the fastener body, and the locking cover can be engaged with pipes on both sides of the connecting portion. The fastener for pipe connection characterized by being made.   2. The pipe connection fastener according to claim 1, wherein the locking cover is engageable with pipes on both sides of the connection portion at both ends in the circumferential direction of the fastener.   An annular projection adjacent to each other at the connection portion is provided on the outer peripheral surface of the pipe, and a body-side engagement portion that forms a pair so as to sandwich the two adjacent annular projections is provided on the fastener body, and the locking cover The pipe-connecting fastener according to claim 1 or 2, further comprising a cover-side engagement portion that forms a pair so as to sandwich two adjacent annular protrusions.

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