JP5567902B2 - Quick fastener disengagement prevention structure - Google Patents

Description

  The present invention relates to a structure for preventing a quick fastener from coming off, and more particularly to a structure for preventing a quick fastener from being used to maintain the connection state when connecting pipes such as water pipes and hot water pipes. .

  Conventionally, a concave and convex connection portion is provided at the pipe end of a pipe such as a hot water supply hot water pipe, and a rib portion protrudes from the outer periphery of the base of the connection portion. In general, a structure in which the butted portion is fixed with a quick fastener is widely known.

  As disclosed in, for example, Patent Document 1, a conventional quick fastener is provided at a butt portion between a first flange of a branch pipe projecting from the outer periphery of a header body and a second flange of a valve body attached to the header body. It is composed of a quick fastener main body to be attached and a retaining member to be attached to the opening. The stopper is pushed inward from the radially outer side facing the opening of the quick fastener body. When the retainer is attached to the quick fastener body, the attachment part of the retainer enters the clamping hole of the quick fastener body, and the outer surface of the front wall of the attachment part adheres along the outer periphery of the first flange and the second flange. It has come to be.

  As another conventional example, as disclosed in, for example, Patent Document 2, in a pipe connection portion where a clip is attached to a flange provided on both the pipe end of a connection pipe and a counterpart member so as to prevent removal, A cover body that covers and protects the open ends of the clip, a portion that is joined to the outer periphery of the open ends of the clip so that the open ends of the clip do not open to the outside, and a center of the main body It is known that a retaining cover for a pipe connecting clip is constituted by a portion joined to the outer periphery of the flange at a position.

JP 2004-156755 A JP-A-8-28770

  However, since the stopper disclosed in Patent Document 1 only enters the clamping hole of the quick fastener body, the stopper may fall off the quick fastener body when a strong external force is applied. is there. Further, the retaining cover disclosed in Patent Document 2 is merely sandwiched from the outside so that the opening ends of the clips do not open to the outside, so that when a strong external force is applied, the retaining cover is clipped. There is a risk of falling off. For this reason, in each of the conventional examples, there is a problem that the connection state is damaged by an external force, and water leakage or the like occurs from the connection site.

  The present invention has been made in view of the above circumstances, and the purpose of the present invention is to provide a quick fastener that can prevent the pipe from dropping off from a connection site even when a strong external force is applied to the quick fastener. The object is to provide an anti-detachment structure.

In order to solve the above-mentioned problems, the present invention attaches an arcuate quick fastener main body having an opening between both ends to a connection part of two pipes and connects the flange parts protruding from both pipes. in the holding state, the quick fasteners by attaching the pair of insertion guide portions respectively from the openings at both ends gave collision towards the outside of the fastener body, widening of the opening ends of the quick fastener body The fastener is prevented from coming off by the fixture, and the fixture is formed in a bridge shape that is mounted across both ends of the opening of the quick fastener body, and at both ends of the fixture, wherein the tube axis direction parallel to the direction of the pipe and a pair of grooves which can be inserted is formed with respect to the pair of insertion guide portion, the pair of insertion guide Parts are shaped upward toward the inner edge 26b thereof projecting in a direction spreading extent toward the tip, the pair of grooves, as viewed from the tube axis direction parallel to the direction of the pipe, the projecting direction of the pair of insertion guide portion The pair of insertion guide portions are fitted in the pair of groove portions, and the movement in both the opening direction and the closing direction is restricted .

  Even if a strong external force is applied to the quick fastener, the present invention can prevent the quick fastener from falling off from the connection portion of the pipe.

An example of embodiment of this invention is shown, (a) is a front view of the state which attached the fixing tool to the quick fastener main body, (b) is a side view of (a), (c) is a connection of two piping It is side surface sectional drawing which shows a state. (A) is a front view of a quick fastener main body same as the above, (b) is a plan view, and (c) is a side view. (A) is a top view of a fixture same as the above, (b) is a rear view, (c) is a front view, and (d) is a side view.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIGS. 1A and 1B show an example of a state in which the quick fastener 1 of the present embodiment is attached to a connection portion of the pipes 10 and 11, and FIG. 1C is a pipe end portion 10a and 11a of the pipes 10 and 11. Shows a state in which the projections and recesses are connected. FIG. 2 shows the quick fastener body 2 of this embodiment, and FIG. 3 shows the fixture 6 of this embodiment.

  In the quick fastener 1 of the present embodiment, a quick fastener main body 2 attached to a connection portion of the pipes 10 and 11 and a fixture 6 that prevents the quick fastener main body 2 from opening are configured separately.

  As shown in FIG. 2, the quick fastener main body 2 is formed by bending a belt-like metal plate having a spring property into an arc shape, and an opening 4 is provided between both ends 2a and 2b in the circumferential direction A. It has been. A long coupling slit 3 is perforated along the circumferential direction A of the quick fastener body 2. The coupling slit 3 has an opening width that can be fitted into the abutting portions of the flange portions 13 and 14 protruding from the pipes 10 and 11, respectively. Is done.

  A part of the quick fastener main body 2 is formed with a knob part 20 that can be picked up with a finger.

  A pair of insertion guide portions 5a and 5b project from the opposite ends 2a and 2b of the opening 4 of the quick fastener body 2 toward the outer sides C and D, respectively. The pair of insertion guide portions 5a and 5b are inclined in a substantially C shape in a direction that gradually increases toward the tip. The inclination angle α (FIG. 2A) is, for example, about 90 °.

  On the other hand, the fixture 6 is for preventing the two ends 2a and 2b of the opening 4 of the quick fastener body 2 from expanding, and is formed of a single injection-molded product as shown in FIG. The fixture 6 of this example includes a bridge portion 6c that is mounted across the pair of insertion guide portions 5a and 5b. At both ends of the bridge portion 6c, a pair of insertion portions 6d and 6e are formed so as to be folded inward in a substantially square shape.

  Grooves 6a and 6b that can be inserted into the pair of insertion guides 5a and 5b are formed in the pair of insertion parts 6d and 6e, respectively. The groove 6a is open to the distal end surface 6g and the one side surface 6h (FIG. 3C) of the insertion portion 6d. The groove 6b is open to the distal end surface 6g and the one side surface 6h (FIG. 3C) of the insertion portion 6e. The groove portions 6a and 6b in this example are respectively closed on the other side surface 6i (FIG. 3B) of the insertion portion 6d (6e). The pair of groove portions 6a and 6b are inclined in the same direction and at the same angle as the pair of insertion guide portions 5a and 5b when viewed from the direction parallel to the tube axis direction B of the pipes 10 and 11. That is, as shown in FIGS. 3B and 3C, the pair of groove portions 6a and 6b are inclined in a reverse C shape in a direction that gradually decreases toward the tip, and the inclination angle β (FIG. 3). (B)) corresponds to the inclination angle α (FIG. 2 (a)) of the pair of insertion guide portions 5a, 5b.

  Thus, when the quick fastener 1 having the above-described configuration is used, the end portions 10a and 11a of the pipes 10 and 11 are connected to each other in a concavo-convex manner (the state shown in FIG. The quick fastener main body 2 is attached to the connection portion of the pipes 10 and 11 so that the coupling slit 3 is fitted into the portion. Thereafter, the pair of insertion portions 6 d and 6 e of the fixture 6 are inserted from a direction parallel to the tube axis direction B of the pipes 10 and 11 toward the pair of insertion guide portions 5 a and 5 b of the quick fastener 1. At this time, the insertion guide portions 5a and 5b and the groove portions 6a and 6b correspond to the same direction at the same angle when viewed from the direction parallel to the pipe axis direction B of the pipe. The insertion guide portions 5a and 5b are smoothly inserted (states shown in FIGS. 1A and 1B). As a result, the quick fastener 1 can be easily and reliably prevented from expanding with one touch using the plug-in type fixture 6.

  Moreover, the attachment accuracy at the time of inserting insertion guide part 5a, 5b can be improved by improving the inclination angle of insertion part 6d, 6e and the dimensional accuracy of groove part 6a, 6b. That is, while the pair of insertion guide portions 5a and 5b can be easily inserted into the groove portions 6a and 6b, the insertion guide portions 5a and 5b are restricted in movement both in the opening direction and in the closing direction. Even when an external force is applied, there is no risk of falling off the connection site easily, and leakage of fluid from the connection site can be prevented.

  Further, since the fixture 6 is inserted from a direction parallel to the pipe axis direction B of the pipes 10 and 11, it can be easily attached even in a place where the space around the pipes 10 and 11 is narrow. In addition, since one side of the grooves 6a and 6b is closed, the insertion guide portions 5a and 5b are not excessively inserted or insufficiently inserted. As a result, the spread prevention by the fixture 6 can be ensured with a single touch and the construction can be saved.

  Moreover, since the fixture 6 of this example is formed by one member of a resin molded product, it can contribute to cost reduction by reducing the number of parts.

  In the above embodiment, the groove portions 6a and 6b are opened on one side surface 6h of the insertion portion 6d (6e) and the other side surface 6i (FIG. 3B) is closed. In this case, the grooves 6a and 6b can be inserted from either the left or right side of the insertion guide portions 5a and 5b, which makes it easy to use.

DESCRIPTION OF SYMBOLS 1 Quick fastener 2 Quick fastener main body 2a, 2b Opening part both ends 3 Joint slit 4 Opening part 5a, 5b Insertion guide part 6 Fixing tool 6a, 6b Groove part 10, 11 Piping A Circumferential direction B Pipe axial direction C, D Outward

Claims (1)

An arcuate quick fastener body having an opening provided between the two ends, in a state where the flange portion coupling the held from both the pipe and attached to the connection site of the two pipes respectively protrude, the openings at both ends of the quick fastener body from the fixture by attaching the pair of insertion guide portion out collision outwards respectively, of the quick fastener and the expanding of the opening ends of the quick fastener body to prevent by the fixture A detachment prevention structure,
The fixture is formed in a bridge shape that is mounted across both ends of the opening of the quick fastener main body, and the pair of fixtures is connected to both ends of the fixture from a direction parallel to the pipe axis direction of the pipe. A pair of grooves that can be inserted into the insertion guide portion are formed,
The pair of insertion guide portions are substantially C-shaped projecting in a direction that widens toward the tip,
The pair of grooves are substantially in the shape of a letter C recessed in the same direction as the protruding direction of the pair of insertion guides when viewed from a direction parallel to the pipe axis direction of the pipe .
The quick fastener disengagement prevention structure characterized in that movement of the pair of insertion guide portions in both the opening direction and the closing direction is restricted by fitting in the pair of groove portions .

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