JP4438549B2 - Pipe connection structure - Google Patents

Description

  The present invention relates to a new pipe connection structure.

  Conventionally, it has been proposed to use, for example, a joint provided with a plurality of through-holes for connection between pipes such as scissors (Patent Document 1).

In the case where the heel is connected using the joint of Patent Document 1, the adhesive applied to the joint for fixing the heel (usually, an adhesive having a high viscosity is often used) The excess adhesive when the rod is inserted into the joint is pushed out to the inner peripheral surface (that is, the drainage channel) through the through-hole of the joint. It has a soot connection structure that can be removed by flowing along with it. And such a connection structure can prevent the deformation | transformation etc. of the collar connection part periphery by an excess adhesive agent.
JP 2001-164716 A

  However, in the connection structure using the joint of Patent Document 1, rainwater flows in the drainage flow path in order to remove excess adhesive when the pipe, which is a pipe, is inserted into the joint and attached. There is a problem that it depends on the weather, and there is a problem that the excess adhesive is not surely removed because the adhesive has a high viscosity adhesive applied to the inner peripheral surface of the joint. there were. For this reason, the remaining adhesive that has not been removed causes the deformation of the periphery of the hook connection portion including each member such as the hook. In addition, it is possible to consider removing the excess adhesive by artificially flowing water into the drainage channel instead of rainwater, but a high-viscosity adhesive is applied to the inner peripheral surface of the joint. However, it is difficult to remove the adhesive by simply removing it with running water, and there is still a problem that each member such as a ridge and the periphery of the heel connection portion are deformed by the remaining adhesive.

  Therefore, from the background as described above, the present invention eliminates the conventional problems and eliminates the need to remove excess adhesive generated when connecting pipes, and the surroundings of each member such as a pipe and the pipe connection portion It is an object of the present invention to provide a new pipe connection structure that can prevent deformation of the pipe.

In order to solve the above-mentioned problems, the present invention firstly has a central tube having pipe holding tube exterior portions at both ends, and is projected toward the outer periphery at one end on the exterior direction side to the central tube. An adhesive placement portion is formed along the entire inner peripheral surface together with the contact portion that is in contact with each other , and the adhesive placement portion is formed with a pipe holding pipe provided with a plurality of through holes. In the pipe connection structure, an adhesive is applied to the adhesive mounting portion of the pipe holding pipe, and the pipe holding pipe exterior parts at both ends of the central pipe are fitted inside the pipe holding pipe. And the pipe holding tube are bonded to each other, and an adhesive is pushed out from the through hole to the outer peripheral side. By this adhesive, the outer peripheral surface of the pipe holding tube and the inner peripheral surface of the pipe are brought into contact with the pipe holding tube. and wherein the tip of the pipe is bonded in a contact state to section That.

The invention of the present application is characterized in that, secondly, the central tube is provided with a locking claw and is engaged with an engagement hole provided in the pipe holding tube, and thirdly, The locking claw is characterized by being substantially flush with the outer peripheral surface of the pipe holding tube when the central tube and the pipe holding tube are connected. Further, fourthly, the adhesive placement portion has an inclined surface shape, and the distal end portion of the central tube has an inclined shape corresponding to the adhesive placement portion.

  According to the first invention of this application as described above, it is not necessary to remove excess adhesive generated when connecting pipes, and deformation of each member such as a pipe and its peripheral part can be prevented.

  Further, according to the second invention, in addition to the effect of the first invention, by engaging the engaging claw of the central tube with the engaging hole of the pipe holding tube, the central tube and the pipe holding tube are The pipes can be connected and transported without being separated, and the center pipe and the pipe holding pipe can be more securely fitted to each other at the time of construction so that the pipe can be smoothly inserted.

Furthermore, according to the third invention, in addition to the effect of the second invention, water leakage from the engaging claw of the central tube and the engaging hole of the pipe holding tube can be prevented more reliably. According to the fourth invention, in addition to the first to third effects, the adhesive can be scraped out more efficiently.

  The invention of the present application has the above-described features. Hereinafter, embodiments of the invention of the present application will be described in detail and specifically with reference to the accompanying drawings.

  FIG. 1 is an exploded perspective view illustrating an embodiment of a pipe connection structure of the present invention. 2A and 2B are cross-sectional views illustrating the connection process in the pipe connection structure of FIG. 1, in which FIG. 2A shows a state in which the pipe holding pipe is fitted to the central pipe together with the pipe, and FIG. The state in the middle of fitting the pipe with the pipe is shown in FIG. 3 is an enlarged cross-sectional view illustrating a main part of the connection process in the pipe connection structure of FIG. 1, in which (A) shows a state in which the pipe holding pipe is fitted with the pipe in the central pipe, and (B) shows (C) shows a state in which the pipe is connected to the central tube while the pipe holding tube is being fitted together with the pipe. FIG. 4 is an enlarged cross-sectional view further enlarging FIG.

  As illustrated in FIG. 1 to FIG. 4, the pipe connection structure of the present invention is such that a pipe 4 such as a water supply pipe and a drain pipe is fitted into the central pipe 1 via the pipe holding pipe 2. The pipes 4 facing each other are connected. The central pipe 1 is formed with stepped pipe holding pipe exterior parts 11 for fitting the pipe holding pipes 2 at both ends. Further, the pipe holding tube 2 has a contact portion 24 projecting in a bowl shape toward the outer periphery at a part or the entire periphery of the peripheral portion which is one end of the central tube 1 on the exterior direction side, The circumferential portion 21 is provided with a plurality of through holes 22 along the circumferential direction, and an adhesive placement portion for placing the adhesive 3 in the vicinity of the through hole 22 on the inner circumferential surface thereof. 23 is formed in the shape of an inclined surface, for example. That is, it can be said that the through-hole 22 is provided in the inclined surface over the entire inner peripheral surface.

  Two such pipe holding pipes are applied along the through hole 22 and the adhesive 3 is applied to the adhesive placement part 23 so that the contact parts 24 of the pipe holding pipes 2 face each other. Thus, the pipe holding tube exterior portion 11 of the central tube 1 is fitted. At this time, the adhesive 41 pushed out at the time of the fitting with the central tube 1 is caused by fitting the pipe holding tube 2 together with the pipe 4 by bringing the tip 41 of the pipe 4 into contact with the contact portion 24. Accordingly, it is possible to connect the pipes 4 facing each other by attaching the pipes 4 to the pipe holding pipes 2.

  That is, the adhesive 3 applied to the adhesive placement portion 23 along the through hole 22 is configured to fit the pipe holding pipe 2 to the central pipe 1, thereby causing the central pipe 1 and the pipe holding pipe 2 to Can be glued. At this time, a part of the adhesive 3 is scraped to the inner surface of the pipe holding tube 2 by the central tube tip 12, and the glued adhesive 31 is also fed from the central tube 1 and the pipe holding tube by the central tube tip 12. 2 contributes to adhesion. At the same time, when the pipe holding pipe 2 is fitted into the central pipe 1, the pipe holding pipe 2 is pressed by the adhesive 3 pushed out to the outer peripheral side of the pipe holding pipe 2, that is, the side in contact with the pipe 4 through the through hole 22. And the pipe 4 can be bonded. That is, the pipe holding tube 2 can be reliably bonded and fixed to the pipe 4 simultaneously with bonding and fixing to the central tube 1. And it is not necessary to remove the excessive adhesive agent produced when connecting the pipe 4, and the adhesive agent 3 can be utilized effectively. That is, the adhesive 3 pushed out when the pipe 4 is connected can be evenly applied over the entire circumference of the inner surface of the pipe 4, and the adhesive 31 squeezed out by the central tube tip 12 is also applied to the central tube 1 and the pipe holding tube. 2 and can prevent deformation of each member such as the pipe 4 and its peripheral portion.

  In addition, as a shape of the pipe holding pipe exterior part 11 of the center pipe 1, it is set as a step part as mentioned above, and the contact part 24 of the pipe holding pipe 2 contacts this step part, and positioning of the pipe holding pipe 2 is carried out. A stepped portion is preferable, but its shape is not particularly limited. For example, although not shown in the figure, it may be formed in a substantially flat shape, etc. In this case, the pipe holding tube is fitted to the central tube in a state where the contact portions of the pipe holding tubes directly abut each other. Is done. In the case of such a configuration, the shape of the central tube can be simplified. Moreover, as illustrated in FIG. 3 and FIG. 4 above, the center tube tip 12 has a shape substantially corresponding to the adhesive placement portion 23 formed in an inclined surface shape, so that the adhesive 3 is efficiently scraped out. This is preferable.

  FIG. 5 is a front view, a plan view, and a side view illustrating an embodiment of the central tube in the pipe connection structure of the present invention. FIG. 6 is a front view, a plan view, and a side view illustrating an embodiment of a pipe holding pipe in the pipe connection structure of the present invention.

  In the pipe connection structure of the present invention, as illustrated in FIG. 5, a locking claw 13 may be disposed on the central tube 1. Then, as illustrated in FIG. 6, the pipe holding tube 2 may be provided with an engagement hole 25 that engages with the locking claw 13 disposed in the central tube 1.

  By adopting a pipe connection structure using the central pipe 1 of FIG. 5 and the pipe holding pipe 2 of FIG. 6, the pipe holding pipe 2 is fitted into the central pipe 1 as in the examples of FIGS. At this time, the engaging claw 13 of the central tube 1 is detachably engaged with the engaging hole 25 of the pipe holding tube 2. Thus, in addition to the effects as described above, since the central tube 1 and the pipe holding tube 2 can be detachably attached in advance, the central tube 1 and the pipe holding tube 2 are not separated at the time of shipment. It can be transported in combination (that is, the central tube 1 and the pipe holding tube 2 can be integrated and transported at the time of shipment). Moreover, at the time of construction, the engagement between the central tube 1 and the pipe holding tube 2 becomes more reliable, and the pipe 4 can be inserted smoothly.

  FIG. 7 is a side view illustrating an example of a connection step in a pipe connection structure using the central tube of FIG. 5 and the pipe holding tube of FIG. 6. FIGS. 8A and 8B are side views illustrating the connection process in the pipe connection structure of FIG. 7, in which FIG. 8A shows a state in which the pipe holding pipe is fitted to the central pipe together with the pipe, and FIG. The state in the middle of fitting the pipe with the pipe is shown in FIG. FIG. 9 is an enlarged cross-sectional view of a main part taken along the circle in FIG.

  Further, as illustrated in FIG. 7 to FIG. 9, the locking claw 13 of the central tube 1 in the pipe connection structure of the present invention is formed when the central tube 1 and the pipe holding tube 2 are connected. It may be substantially flush with the outer peripheral surface. 8 and FIG. 9, the connection process of the pipe 4 illustrated in FIG. 8 and FIG. 9 is substantially the same as the example of FIG. 2 to FIG. The nail | claw 13 is arrange | positioned and the pipe holding tube 2 differs in the point provided with the engagement hole 25 engaged with the latching claw 13 in the position corresponding to the arrangement | positioning position of the latching claw 13. FIG.

  With such a configuration, when the connection between the pipes 4 is completed, the locking claw 13 of the central tube 1 is retracted, and this locking claw 13 also becomes a part of the outer peripheral surface of the pipe holding tube 2. That is, the locking claw 13 is substantially flush with the outer peripheral surface of the pipe holding tube 2, and the adhesive 3 can be pushed out by the locking claw 13. The locking claw 13 is also bonded to the pipe holding tube 2, and in addition to the above various effects, water leakage from the locking claw 13 of the central tube 1 and the engagement hole 25 of the pipe holding tube 2. Can be more reliably prevented.

  Of course, the pipe connection structure of the present invention is not limited to the above examples. For example, the material of the central tube 1, the pipe holding tube 2, the pipe 4 such as the eaves is not particularly limited, but resins such as plastics, metals or the like can be used.

It is the disassembled perspective view which illustrated one Embodiment of the connection structure of the pipe of this invention. It is sectional drawing which illustrated the connection process in the connection structure of the pipe of FIG. 1, (A) is a state which fits a pipe holding pipe with a pipe in a center pipe, (B) is a pipe holding pipe with a pipe in a center pipe. The state in the middle of fitting is shown in FIG. FIG. 2 is an enlarged cross-sectional view of a main part illustrating a connection process in the pipe connection structure of FIG. 1, (A) is a state in which a pipe holding pipe is fitted with a pipe in the central pipe, and (B) is a pipe holding pipe in the central pipe. (C) shows the pipe connection completed state. It is the expanded sectional view which expanded further FIG. 3 (C). It is the front view, top view, and side view which illustrated one Embodiment of the center pipe | tube in the pipe connection structure of this invention. It is the front view, top view, and side view which illustrated one Embodiment of the pipe holding pipe in the pipe connection structure of this invention. It is the side view which illustrated an example of the connection process in the connection structure of the pipe using the center pipe | tube of FIG. 5, and the pipe holding pipe of FIG. It is the side view which illustrated the connection process in the connection structure of the pipe of FIG. 7, (A) is a state which fits a pipe holding pipe with a pipe in a center pipe, (B) is a pipe holding pipe in a center pipe with a pipe. The state in the middle of fitting is shown in FIG. It is a principal part expanded sectional view in the round mark of FIG.8 (C).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Central pipe 11 Pipe holding pipe exterior part 12 Central pipe front-end | tip 13 Locking claw 2 Pipe holding pipe 21 Circumferential part 22 Through-hole 23 Adhesive mounting part 24 Contact part 25 Engagement hole 3 Adhesive 31 It was scraped out Adhesive 4 Pipe 41 Tip

Claims (4)

A center tube having pipe holding tube exterior portions at both ends, and an adhesive placement portion over the entire inner peripheral surface together with a contact portion protruding toward the outer periphery at one end of the exterior direction side of the center tube The adhesive mounting portion is formed of a pipe holding pipe provided with a plurality of through holes and is opposed to each other, and is an adhesive mounting portion of the pipe holding pipe. An adhesive is applied to the inside of the pipe holding pipe, and the pipe holding pipe exterior parts at both ends of the central pipe are fitted to bond the central pipe and the pipe holding pipe, and from the through hole to the outer peripheral side. Adhesive is pushed out, and the outer peripheral surface of the pipe holding tube and the inner peripheral surface of the pipe are bonded to the contact portion of the pipe holding tube with the tip of the pipe in contact with the adhesive. Pipe connection structure.   2. The pipe connection structure according to claim 1, wherein a latching claw is disposed on the central pipe and is engaged with an engagement hole provided in the pipe holding pipe.   3. The pipe connection structure according to claim 2, wherein the locking claw is substantially flush with the outer peripheral surface of the pipe holding pipe when the central pipe and the pipe holding pipe are connected. The pipe connection according to any one of claims 1 to 3, wherein the adhesive mounting portion has an inclined surface shape, and a tip portion of the central tube has an inclined shape corresponding to the adhesive mounting portion. Construction.

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