JP4579147B2 - Auxiliary equipment for pipe connection - Google Patents

Description

  The present invention relates to an auxiliary tool for pipe connection used when connecting a polyethylene pipe for water supply specified in JIS K 6762 by a joint.

  Conventionally, what is shown in FIG. 11 is known as a metal joint used for the connection of the polyethylene pipe for water supply prescribed | regulated to JISK6762. The joint 10 is referred to as a steel pipe socket with a male thread, and is used when joining a polyethylene pipe for water supply (hereinafter referred to as a pipe) P1 and another type pipe P2. The joint 10 forms a connection portion 11a at one end and a screw 11b at the other end, while a socket body 11 having an inner peripheral surface formed on a tapered surface 11c, and the socket body 11 A nut 12 having a female screw 12a that can be screwed into the male screw 11b, an incore 13 whose outer peripheral surface is formed into a tapered surface 13a, forcibly inserted into the inner surface of the end portion of the pipe P1, and whose diameter is enlarged; A ring 14 having an outer peripheral surface formed on a tapered surface 14a corresponding to the tapered surface 11c of the socket body 11 and a plurality of kerfs 14b (see FIG. 12) formed at intervals in the circumferential direction. (See Non-Patent Document 1).

When connecting the pipe P1 and the other-type pipe P2 using such a joint 10, first, after sequentially inserting the nut 12 and the ring 14 through the pipe P1 (see FIG. 12), the pipe P1 is connected to the inner surface of the end portion of the pipe P1. The in-core 13 is inserted, and the in-core 13 is knocked in and forcedly inserted until the end surface of the pipe P1 and the end surface of the in-core 13 are flush with each other (see FIGS. 13 and 14). At this time, the diameter of the end portion of the pipe P <b> 1 is increased by the tapered surface 13 a of the in-core 13. Next, when the socket body 11 in which the other-type pipe P2 is connected to the connection portion 11a is inserted into the outer peripheral surface of the pipe P1 into which the in-core 13 is inserted and the nut 12 is screwed into the male screw 11b of the socket body 11, the socket body 11 On the other hand, the nut 12 is attracted relatively. At this time, the taper surface 11c of the socket body 11 presses the taper surface 14a of the ring 14, the nut 12 presses the rear end surface of the ring 14, and the pipe P1 into which the incore 13 is inserted is connected between the incore 13 and the ring 14. The tube P1 is prevented from being pulled out. As a result, the pipe P1 and the other-type pipe P2 can be connected via the joint 10 (see FIG. 15).
“Japan Waterworks Standard Polyethylene Pipe Metal Fitting B 116 for Waterworks”, Japan Waterworks Association, March 22, 1995, P17 (Appendix 7)

  However, when connecting the pipe P1 and the other type pipe P2 using the joint 10 described above, the nut 14 or the ring 14 is forgotten to be inserted, the orientation of the nut 12 or the ring 14 is wrong, and the ring 14 is inserted into the pipe P1 when the in-core 13 is inserted. May cause human errors such as cracking of the ring 14 and insufficient insertion of the incore 13 into the pipe P1 due to the position where the diameter of the pipe P1 is increased.

  When such a mistake occurs, after the insertion of the in-core 13, the end portion of the pipe P1 is expanded, so that the nut 12 and the ring 14 cannot be added or reinserted. Further, it is not easy to extract the inserted in-core 13. As a result, it is necessary to cut and remove the end of the pipe P1 and start the operation again. At this time, if the connection allowance of the pipe P1 to the joint 10 cannot be secured after cutting, there is a problem that it is necessary to rework the piping work over a wide range, which takes time.

  The present invention has been made in view of such problems, and can prevent the occurrence of human error by an operator as much as possible in the connection work between a pipe by a joint and another type of pipe. An auxiliary tool for pipe connection is provided.

  The present invention consists of a nut, a ring, an incore and a socket body, and after inserting the incore into the inner surface of the end of the pipe through which the nut and the ring have been inserted in advance while expanding the pipe end, In the joint that fastens the connected socket body and nut, and connects the pipe and other types of pipes, etc., the substantially pipe-shaped main body part, the outer diameter corresponding to the inner diameter of the in-core, and the in-core An in-core holding portion of a length corresponding to the length of the nut, a nut mounting portion that is provided integrally with the main body portion and can be screwed with a female screw of the nut, and is formed on the inner peripheral surface of the nut mounting portion, A ring holding portion having a taper surface corresponding to the taper surface of the ring, with the in-core holding portion holding the in-core, the ring holding portion holding the ring, and the nut mounting portion being fastened with a nut Insert the end of the tube to Nkoa, it is characterized in that forcibly inserting the tube while expanded the tube end by striking the body portion to the in-core.

  According to the present invention, after the incore is fitted and held in the incore holding portion of the auxiliary tool, the ring is mounted and held in the ring holding portion, and the nut is screwed into the nut mounting portion and fastened. Next, the end portion of the tube is inserted into the incore held by the incore holding portion, the main body portion is struck with a hammer or the like, and the incore is forcibly inserted into the end portion of the tube. When the tube is inserted into the in-core, the auxiliary tool is rotated to release the fastening to the nut. After this, it is possible to connect the pipe and other types of pipes etc. via a joint by fitting the socket body to which the other type pipes are connected to the outer peripheral surface of the pipe into which the in-core is inserted and screwing the nut into the socket body. it can.

  Here, even if an attempt is made to insert the ring in the reverse direction into the ring holding part, the insertion is prevented by the taper surface of the ring holding part, and the tapered surface and the taper surface of the ring holding part are in constant contact with each other. Entering more than the length is prevented. Further, the nut cannot be fastened to the nut mounting portion with the direction reversed.

  As a result, the ring and nut are not inserted in opposite directions, and the ring is held at a position away from the in-core by a certain length, so that it does not break when the in-core is inserted.

  In the present invention, when a confirmation window is formed on the peripheral wall of the main body, the insertion state of the pipe with respect to the in-core can be confirmed through the confirmation window, and an insufficient amount of insertion of the in-core with respect to the pipe can be prevented.

  In the present invention, when the hitting portion is formed so as to protrude from the main body portion, the incore is not directly struck, so that the occurrence of deformation of the incore can be prevented.

  ADVANTAGE OF THE INVENTION According to this invention, generation | occurrence | production of the artificial mistake by operators, such as a mistake of direction of a nut and a ring, can be prevented as much as possible in the connection operation | work of the pipe | tube and other kind pipe | tubes by a coupling.

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

  In addition, about the coupling 10, it is as having demonstrated previously, the same code | symbol is attached | subjected to the same member, and detailed description is abbreviate | omitted.

  1 to 3 show an embodiment of the pipe connection auxiliary tool 1 of the present invention.

  The auxiliary tool 1 is integrally formed of plastic, is provided with a substantially pipe-shaped main body portion 2 closed at one end, and protrudes outward from the inner surface of the closed end portion of the main body portion 2, so that the in-core 13 can be inserted. Thus, the cylindrical in-core holding part 3 having a length corresponding to the outer diameter corresponding to the inner diameter and the length of the in-core 13, and the front end surface of the main body part 2 can be screwed with the female screw 12 a of the nut 12. A ring-shaped nut mounting portion 4 having a screw, a ring holding portion 5 formed on the inner peripheral surface of the nut mounting portion 4 and having a tapered surface corresponding to the tapered surface 14 a of the ring 14, and an outer surface of the main body portion 2. The peripheral wall of the main body 2 is cut out over a certain angular range, and two confirmation windows 2a are formed symmetrically with respect to the center.

  Next, a procedure for inserting the in-core 13 into the pipe P1 using the pipe connecting auxiliary tool 1 configured as described above will be described.

  First, after inserting and holding the incore 13 in the incore holding part 3 of the auxiliary tool 1 (see FIG. 4), the ring 14 is attached to the ring holding part 5 and held (see FIG. 5). Next, after the nut 12 is screwed into the nut mounting portion 4 and fastened (see FIG. 6), the tube P1 is gripped and the end of the tube P1 is inserted into the incore 13 held by the incore holding portion 3 (see FIG. 7). . Thereafter, the striking portion 6 is struck with a hammer or the like while grasping the pipe P1, and the in-core 13 is forcibly inserted into the end of the pipe P1.

  Here, the insertion state of the pipe P1 with respect to the in-core 13 can be confirmed through the confirmation window 2a.

  If the pipe P1 is securely inserted into the in-core 13, that is, if it is confirmed from the confirmation window 2a that the tip of the pipe P1 has reached the inner surface of the closed end of the main body 2 (see FIG. 8). If the auxiliary tool 1 is rotated and the screwing of the nut mounting portion 4 with respect to the nut 12 is loosened to release the fastening, the in-core 13 can be reliably inserted into the distal end portion of the pipe P1 as shown in FIG. .

  Here, if the ring 14 is inserted in the ring holding portion 5 in the opposite direction, the ring 14 cannot be inserted by the taper surface of the ring holding portion 5, and the taper surface 14 a and the taper of the ring holding portion 5 are not allowed. This prevents the surface from coming into surface contact and entering more than a certain length. Therefore, the direction of the ring 14 is not reversed, and the ring 14 is held at a position away from the tip of the in-core 13 by a certain length. For this reason, the ring 14 is not broken when the in-core 13 is forcibly inserted. In addition, since the incore 13 is not directly struck, deformation of the incore 13 does not occur.

  On the other hand, even if it is attempted to fasten the nut 12 to the nut mounting portion 4 in the reverse direction, the nut 12 cannot be fastened, so that the direction of the nut 12 is not mistaken.

  The ring 14 is reliably prevented from being detached by the nut 12 fastened to the nut mounting portion 4.

  In this way, when the nut 12 and the ring 14 are inserted into the end of the pipe P1, and the incore 13 is inserted into the inner surface of the end, as described above, the other-type pipe P2 is connected to the connecting portion 11a. The connected socket body 11 is fitted into the outer peripheral surface of the pipe P1 into which the in-core 13 is inserted, and the nut 12 is screwed into the male screw 11b of the socket body 11. Thereby, the nut 12 is pulled relatively with respect to the socket main body 11, and the pipe P <b> 1 and the other type pipe P <b> 2 can be connected via the joint 10.

  At this time, the taper surface 11c of the socket body 11 presses the taper surface 14a of the ring 14, the nut 12 presses the rear end surface of the ring 14, and the pipe P1 into which the incore 13 is inserted is connected between the incore 13 and the ring 14. The tube P1 is prevented from coming out because it is sandwiched between them.

  In the above-described embodiment, the joint 10 is exemplified as a steel pipe socket with a male pipe connecting the pipe P1 and the other type pipe P2, but the female pipe female screw is changed to a female screw. The joint may be a joint referred to as a socket and may be any joint that connects the pipe P1 and the other type pipe P2, and the shape of the joint is not limited.

  Moreover, although the joint 10 that connects the pipe P1 and the other-type pipe P2 has been described, a joint that connects the pipe P1 and a faucet device may be used.

  As described above, according to the present invention, in connection work between a pipe by a joint and other types of pipes, it is possible to prevent reworking of piping work due to human error by an operator and improve work efficiency. it can.

It is a perspective view which shows one Embodiment of the auxiliary tool for pipe connection of this invention. It is a perspective view from the other side of one embodiment of the auxiliary tool for pipe connection of the present invention. It is the front view of the auxiliary tool for pipe connection of FIG. 1, its half sectional view, and a rear view. It is process drawing explaining the connection procedure of the pipe | tube by the auxiliary tool for pipe | tube connection of FIG. It is process drawing explaining the connection procedure of the pipe | tube by the auxiliary tool for pipe | tube connection of FIG. It is process drawing explaining the connection procedure of the pipe | tube by the auxiliary tool for pipe | tube connection of FIG. It is process drawing explaining the connection procedure of the pipe | tube by the auxiliary tool for pipe | tube connection of FIG. It is process drawing explaining the connection procedure of the pipe | tube by the auxiliary tool for pipe | tube connection of FIG. It is process drawing explaining the connection procedure of the pipe | tube by the auxiliary tool for pipe | tube connection of FIG. It is a half section view of a pipe connected via a joint and a joint, other kind pipe. It is a half sectional view showing a joint. It is process drawing explaining the conventional procedure which connects a pipe | tube and another kind pipe | tube via a coupling. It is process drawing explaining the conventional procedure which connects a pipe | tube and another kind pipe | tube via a coupling. It is process drawing explaining the conventional procedure which connects a pipe | tube and another kind pipe | tube via a coupling. It is a half section view of a pipe connected via a joint and a joint, other kind pipe.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Auxiliary tool for pipe connection 2 Main body part 3 In-core holding part 4 Nut mounting part 5 Ring holding part 6 Hitting part 10 Joint 11 Socket main body 12 Nut 12a Female thread 13 In-core 13a Tapered surface 14 Ring 14a Tapered surface P1 Pipe P2 Other pipes

Claims (3)

  A socket consisting of a nut, ring, in-core, and socket body, in which the in-core is forcibly inserted into the inner surface of the end of the tube through which the nut and ring have been inserted in advance and the other end of the tube is connected. In joints that fasten the main body and nuts and connect pipes and other types of pipes, etc., a substantially pipe-shaped main body part and an outer diameter corresponding to the inner diameter of the in-core and the length of the in-core are provided integrally with the main body part. Corresponding length of the in-core holding part, a nut mounting part provided integrally with the main body and having a male screw that can be screwed into the nut, and an inner peripheral surface of the nut mounting part, and a tapered surface of the ring A ring holding portion having a tapered surface corresponding to the in-core holding portion, the in-core holding portion holding the in-core, the ring holding portion holding the ring, and the nut mounting portion with the nut fastened to the in-core. Merge the ends, the tube connecting aid, characterized by forcibly inserting the tube while expanded the tube end by striking the body portion to the in-core.   The auxiliary tool for pipe connection according to claim 1, wherein a confirmation window is formed on a peripheral wall of the main body.   The auxiliary tool for pipe connection according to claim 1, wherein a striking portion projects from the main body portion.

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