JP5643621B2 - Incore - Google Patents

Description

  The present invention relates to an incore used by being inserted into an end portion of a pipe in a joint for a pipe used for, for example, a water pipe, a hot water pipe or the like.

  In general, the in-core is configured by providing a flange portion at one end of a cylindrical portion, and the resin pipe is inserted into a cylindrical joint in a state where the cylindrical portion is inserted into an end portion of the resin pipe. This in-core reinforces the resin pipe when it is connected to the joint. The present applicant has already proposed this type of in-core (see Patent Document 1). That is, in this in-core, a plurality of protrusions that are in contact with the inner peripheral surface of the resin pipe are formed on the outer peripheral surface of the cylindrical portion so as to extend in the axial direction of the cylindrical portion. With such a protrusion, the in-core can be easily attached to the end of the resin pipe, and inadvertent dropping from the resin pipe can be prevented.

JP 2003-90486 A

  However, in the conventional configuration described in Patent Document 1, when the in-core is inserted into the end portion of the resin pipe and the resin pipe is inserted into the joint in that state, the end surface of the resin pipe is the inner end surface of the flange portion of the in-core. May be in a state where water accumulates in the gap between the outer peripheral surface of the cylindrical portion of the in-core and the inner peripheral surface of the resin pipe. In this case, the water that has entered the gap is retained and becomes dead water. This dead water has a problem in that the residual chlorine concentration decreases with time, and bacteria such as bacteria grow in the dead water and it is unsanitary.

  Therefore, an object of the present invention is to reduce the remaining water in the gap between the outer peripheral surface of the tube portion and the inner peripheral surface of the pipe during use, and to solve the sanitary problem. Is to provide.

In order to achieve the above object, an in-core according to claim 1 is provided with a cylindrical portion inserted into an end portion of a pipe, and a flange portion provided at one end thereof with which an end surface of the pipe abuts. An in-core configured to be inserted into a tubular joint inserted in a portion,
A protrusion extending in the axial direction of the cylindrical portion is provided on the outer peripheral surface of the cylindrical portion, and when the end surface of the pipe comes into contact with the inner end surface of the cylindrical portion, it is between the inner end surface of the cylindrical portion and the end surface of the pipe. A protrusion for forming a gap is provided , and the protrusion is provided on a plane including an extension line of the protrusion and an axis of the cylindrical portion .

請 Motomeko-core according to 2, in the invention according to claim 1, wherein the protrusion is characterized by being formed in an inclined shape which becomes higher flange portion.

The in-core according to claim 3 is the invention according to claim 1 or 2 , wherein the flange portion is provided with a through hole penetrating from the outer end side to the inner end side of the flange portion. Features.

The in-core according to claim 4 is the invention according to claim 3 , wherein when the in-core is inserted into the end portion of the pipe, the through-hole is a cylindrical portion on both sides in the circumferential direction of the cylindrical portion with the protrusion as a boundary. It is formed so that it may communicate with the space | gap part between the outer peripheral surface of this, and the inner peripheral surface of a pipe.

According to the present invention, the following effects can be exhibited.
In the in-core of the present invention, the outer peripheral surface of the cylindrical portion is provided with a protrusion extending in the axial direction of the cylindrical portion, and the inner end surface of the flange portion when the end portion of the pipe comes into contact with the inner end surface of the flange portion. And a projection for forming a gap between the pipe and the end face of the pipe. For this reason, when the in-core is inserted into the end portion of the pipe, a gap is formed between the end surface of the pipe and the inner end surface of the flange portion of the in-core. Accordingly, the gap between the outer peripheral surface of the in-core cylindrical portion and the inner peripheral surface of the pipe is communicated with the outside through this gap. As a result, the water that has entered the gap is prevented from staying there.
In addition, the projection of the flange portion of the in-core is provided on a plane including the extension line of the ridge of the tube portion and the axis of the tube portion. For this reason, a gap between the outer peripheral surface of the in-core cylindrical portion and the inner peripheral surface of the pipe is easily formed at the protruding portion, and a gap due to the protrusion can be provided so as to correspond to the gap portion. Formation can be effectively prevented.

  Therefore, according to the in-core of the present invention, it is possible to suppress water from remaining in the gap between the outer peripheral surface of the cylindrical portion and the inner peripheral surface of the pipe during use, and to solve the sanitary problem. Can do.

The perspective view which shows the in-core in embodiment of this invention. The half sectional view showing an in-core. The left view which shows an in-core. The right view which shows an in-core. The right view which expands and shows the principal part of an in-core. The perspective view which decomposes | disassembles and shows a coupling. The principal part expanded sectional view which shows the state which inserted the in-core in the resin pipe. The half sectional view which shows the state before inserting the resin pipe which inserted the in-core in the joint in a joint. FIG. 9 is a half cross-sectional view showing a state where a resin pipe into which an in-core is inserted from the state of FIG. FIG. 10 is a half cross-sectional view showing a state where a resin pipe having an in-core inserted from the state of FIG. 9 is inserted up to the contact surface of the joint.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments embodying the present invention will be described in detail with reference to FIGS.
First, in-core will be described. As shown in FIG. 1, the in-core 10 is provided with a collar portion 12 that extends in an annular shape toward the outer periphery so as to be orthogonal to the cylindrical portion 11 at one end (left end in FIG. 1) of the cylindrical cylindrical portion 11. It is configured. A tapered surface 13 whose diameter decreases toward the outer end side is formed on the outer periphery of the inner end portion (right end portion in FIG. 1) of the cylindrical portion 11, and can be smoothly inserted when the in-core 10 is inserted into the end portion of the resin pipe 14. It is like that. And the cylinder part 11 of the in-core 10 is inserted in the edge part of the resin pipe 14, and the end surface 14a of the resin pipe 14 contact | abuts to the inner end surface 12a of the collar part 12. As shown in FIG.

  The in-core 10 is made of a synthetic resin (engineering plastic) such as polyphenylene sulfide resin (PPS) or polyacetal resin (POM). In addition, the outer peripheral surface 11a and the inner peripheral surface of the cylindrical portion 11 of the in-core 10 are formed in a tapered shape so that the flange portion 12 side of the cylindrical portion 11 is thick, and the die core is easily formed when the in-core 10 is molded. Has been. The resin pipe 14 is formed of a synthetic resin such as polyolefin (crosslinked polyethylene, polybutene, etc.), and its end surface 14 a is cut so as to be orthogonal to the axis of the resin pipe 14.

  As shown in FIGS. 9 and 10, the in-core 10 is configured to be inserted into a cylindrical joint body 16 constituting the joint 15 in a state where the in-core 10 is inserted into the end of the resin pipe 14. The outer peripheral surface of the flange portion 12 is a tapered portion 12b that is reduced in diameter toward the outer end side, and is easily inserted when the resin pipe 14 to which the in-core 10 is attached is inserted into the joint 15.

  As shown in FIGS. 1 to 4, a protrusion 17 having an arcuate cross section is formed on the outer periphery of the cylindrical portion 11 of the in-core 10 so as to extend in the axial direction of the cylindrical portion 11. The protrusions 17 are formed in an inclined shape that becomes higher toward the flange portion 12 side, and are formed in a tapered shape so as to become wider toward the flange portion 12 side. Three ridges 17 are provided at intervals of 120 ° in the circumferential direction of the cylindrical portion 11. By providing the protrusion 17, it is possible to prevent the outer peripheral surface 11 a of the cylindrical portion 11 from coming into close contact with the inner peripheral surface 14 b of the resin pipe 14 and to easily insert the in-core 10 into the end portion of the resin pipe 14. The incore 10 can be prevented from dropping from the resin pipe 14 later.

  As shown in FIGS. 1 and 5, the inner end surface 12 a of the flange portion 12 is on a surface passing through the extension line of one protrusion 17 (the protrusion at the upper end portion in FIG. 1) and the axis of the cylinder portion 11. A protrusion 18 is provided to protrude toward the cylinder part 11 side. The protrusion 18 is formed to a height of about 0.1 mm by the numeral “1”. As shown in FIG. 7, when the end surface 14 a of the resin pipe 14 comes into contact with the inner end surface 12 a of the flange portion 12, a gap is formed between the inner end surface 12 a of the flange portion 12 and the end surface 14 a of the resin pipe 14. 19 is formed. The gap 19 is configured such that water remaining in the gap portion 20 between the outer peripheral surface 11a of the cylindrical portion 11 of the in-core 10 and the inner peripheral surface 14b of the resin pipe 14 communicates with the outside.

  A through-hole 21 penetrating from the outer end side to the inner end side of the flange portion 12 has a circular arc shape in the flange portion 12 so as to straddle the surface passing through the extension line of the protrusion 17 and the axis of the cylinder portion 11. Is formed. As shown in FIG. 5, when the in-core 10 is inserted into the end portion of the resin pipe 14, the through-hole 21 has an outer peripheral surface of the cylindrical portion 11 on both sides in the circumferential direction of the cylindrical portion 11 with the protrusion 17 as a boundary. 11a and the inner peripheral surface 14b of the resin pipe 14 are formed so as to communicate with the first gap portion 20a and the second gap portion 20b. Through this through hole 21, water existing in the first gap portion 20a and the second gap portion 20b can enter and exit outside.

  Next, the joint 15 will be described. As shown in FIGS. 6 and 8, the joint 15 has a substantially cylindrical shape made of a metal such as an alloy (brass, bronze, etc.) and a substantially cylindrical body made of a metal such as an alloy (brass, bronze, etc.). A cap 22 having a shape is screwed together. An insertion hole 23 for inserting the resin pipe 14 is opened in the cap 22. The resin pipe 14 is inserted into the joint body 16 through the insertion hole 23 of the cap 22 with the cap 22 screwed into the joint body 16. In the joint body 16, the contact surface 24 is formed in an annular shape so as to be orthogonal to the axis of the joint body 16, and when the resin pipe 14 is inserted into the joint body 16, the insertion of the resin pipe 14 is the contact surface. It stops at 24.

  A male thread portion 25 is threaded on the outer peripheral surface of the base end of the joint body 16 so that it can be screwed into a pipe body such as a water pipe (not shown). A first annular groove 26 and a second annular groove 27 are formed in the inner peripheral surface of the joint body 16 in order from the inner back. In the first annular groove 26 and the second annular groove 27, a first seal ring 28 and a second seal ring 29 having a circular cross section formed of rubber such as ethylene-propylene-diene copolymer rubber (EPDM) are respectively provided. It is inserted. When the resin pipe 14 is inserted into the joint body 16, the first seal ring 28 and the second seal ring 29 press the outer peripheral surface of the resin pipe 14, and the outer peripheral surface of the resin pipe 14 and the inner periphery of the joint main body 16. The gap between the surfaces is sealed.

  In the joint body 16, a pair of retaining rings 31 with spacers 30 interposed are arranged so as to be sandwiched between the joint body 16 and the cap 22. Then, the retaining ring 31 bites into and engages with the outer peripheral surface of the resin pipe 14 inserted into the joint body 16, so that the resin pipe 14 is retained and retained within the joint body 16. .

Next, the operation of the in-core 10 and the joint 15 configured as described above will be described.
Now, the cylindrical portion 11 of the in-core 10 is inserted into the end portion of the resin pipe 14 and inserted until the end surface 14a of the resin pipe 14 contacts the inner end surface 12a of the flange portion 12 of the in-core 10. At this time, since the three protrusions 17 are provided on the outer peripheral surface 11 a of the cylindrical portion 11 of the in-core 10 so as to extend in the axial direction, the inner peripheral surface 14 b of the resin pipe 14 is formed on the protrusion 17. The in-core 10 is smoothly inserted into the resin pipe 14 by being guided.

  As shown in FIG. 7, when the end surface 14 a of the resin pipe 14 is in contact with the inner end surface 12 a of the flange 12 of the in-core 10, a protrusion is formed between the inner end surface 12 a of the flange 12 and the end surface 14 a of the resin pipe 14. A gap 19 is formed by 18. The gap 19 communicates with a gap portion 20 between the outer peripheral surface 11 a of the cylindrical portion 11 of the in-core 10 and the inner peripheral surface 14 b of the resin pipe 14 and also communicates with the through hole 21. For this reason, the water accumulated in the gap portion 20 can flow out through the gap 19 or through the through hole 21 from the gap 19 to flow out, thereby preventing the formation of dead water.

  Subsequently, after inserting a pair of retaining rings 31 with spacers 30 interposed in the joint body 16, the cap 22 is fastened to the joint body 16. Next, as shown in FIG. 8, the end of the resin pipe 14 on the side where the in-core 10 is inserted is inserted into the joint body 16 from the insertion hole 23 of the cap 22.

  At this time, as shown in FIG. 9, the outer end surface of the flange portion 12 of the in-core 10 may not reach the contact surface 24 in the joint body 16 and may come into contact with the second seal ring 29 and stop. In this case, in the pressure inspection at the time of construction, the gap between the flange 12 of the incore 10 and the second seal ring 29 is sealed, but the liquid as the transport fluid is removed from the through hole 21 of the incore 10 by the pressure. 12 flows out through the gap 19 between the inner end face 12 a of the resin 12 and the end face 14 a of the resin pipe 14, and leaks from the tip of the joint body 16. Therefore, it can be confirmed whether or not the resin pipe 14 is sufficiently inserted into the joint body 16 by checking whether or not there is such a leak.

  Thereafter, the resin pipe 14 in which the in-core 10 is inserted is inserted until it comes into contact with the contact surface 24 in the joint body 16, thereby reaching the state shown in FIG. 10. In this state, the connection of the resin pipe 14 to the joint 15 is completed.

The effects exhibited by the above embodiment will be described collectively below.
(1) According to the in-core 10 of the present embodiment, a protrusion 17 extending in the axial direction of the cylindrical portion 11 is provided on the outer periphery of the cylindrical portion 11, and a resin pipe 14 is provided on the inner end surface 12 a of the flange portion 12. A protrusion 18 for forming a gap 19 is provided between the inner end surface 12a of the flange 12 and the end surface 14a of the resin pipe 14 when the end surface 14a contacts. For this reason, when the in-core 10 is inserted into the resin pipe 14, the cylindrical portion of the in-core 10 through the gap 19 formed between the end surface 14 a of the resin pipe 14 and the inner end surface 12 a of the flange 12 of the in-core 10. 11 and the inner peripheral surface 14b of the resin pipe 14 communicate with the outside. As a result, the water that has entered the gap 20 can enter and exit without staying there, and the formation of dead water is avoided.

Therefore, according to the in-core 10 of the present embodiment, it is possible to effectively suppress water remaining in the gap portion 20 between the outer peripheral surface 11a of the cylindrical portion 11 and the inner peripheral surface 14b of the resin pipe 14 during use. It is possible to solve the hygiene problem by suppressing the generation of various germs.
(2) The protrusion 18 of the flange portion 12 of the in-core 10 is provided on a surface passing through the extension line of the protrusion 17 of the cylindrical portion 11 and the axis line of the cylindrical portion 11. For this reason, the gap 20 between the outer peripheral surface 11 a of the cylindrical portion 11 of the in-core 10 and the inner peripheral surface 14 b of the resin pipe 14 is easily formed at the protrusion 17, and the protrusion 18 corresponds to the gap 20. Therefore, the formation of dead water can be effectively prevented.
(3) The protrusion 17 of the cylinder part 11 of the in-core 10 is formed in an inclined shape that becomes higher toward the flange 12 side. Therefore, the end portion of the resin pipe 14 is slightly lifted by the protrusions 17, the end surface 14 a of the resin pipe 14 is slightly inclined, and the gap 19 due to the projection 18 of the flange portion 12 can be easily formed, and the resin pipe The in-core 10 inserted into 14 can be further prevented from falling off.
(4) The through-hole 21 penetrating from the outer end side to the inner end side of the flange portion 12 is formed in the flange portion 12 of the in-core 10. Accordingly, the water flow between the gap 20 and the through hole 21 between the outer peripheral surface 11a of the cylindrical portion 11 of the in-core 10 and the inner peripheral surface 14b of the resin pipe 14 can be performed more easily. The dead water in 20 can be effectively prevented.
(5) When the in-core 10 is inserted into the end portion of the resin pipe 14, the through-hole 21 of the flange portion 12 of the in-core 10 It is formed so as to communicate with the first gap portion 20a and the second gap portion 20b between the outer circumferential surface 11a and the inner circumferential surface 14b of the resin pipe 14. For this reason, the one through hole 21 can communicate the through hole 21 with the first gap portion 20a and the second gap portion 20b on both sides in the circumferential direction of the cylindrical portion 11 with the protrusion 17 as a boundary. The dead water in the gap 20 can be effectively prevented with a simple configuration. Furthermore, since only one through hole 21 is formed without forming a plurality of through holes 21, it is possible to prevent the strength of the flange 12 from being reduced.

In addition, the said embodiment can also be changed and actualized as follows.
The ridges 17 can be formed to have the same height and the same width, or an inclined shape that becomes higher toward the flange 12 side, the same width, or the same height and the wider toward the flange 12 side.

  In addition, two ridges 17 are provided so as to be opposed to each other by 180 ° on a surface passing through the ridges 17 of the above-described embodiment and the axis of the cylindrical portion 11, or four or more are provided at appropriate positions. It is also possible. In this case, the in-core 10 can be stably inserted into the end portion of the resin pipe 14 by providing the protrusions 17 at equal intervals in the circumferential direction of the cylindrical portion 11.

The projection 18 can be formed in an arbitrary shape such as an alphabet in addition to numbers such as 2, 8. Furthermore, the number of protrusions 18 can be set to two or more, and in this case, the gap 19 can be widened.

  As the pipe, in addition to the resin pipe 14, a soft metal pipe such as a copper pipe can be used.

  DESCRIPTION OF SYMBOLS 10 ... Incore, 11 ... Cylindrical part, 11a ... Outer peripheral surface, 12 ... Gutter part, 12a ... Inner end surface, 14 ... Resin pipe, 14a ... End surface, 14b ... Inner peripheral surface, 15 ... Joint, 17 ... Projection, 18 ... Projection, 19 ... gap, 20 ... gap, 20a ... first gap, 20b ... second gap, 21 ... through hole.

Claims (4)

A cylindrical portion inserted into the end portion of the pipe and a flange portion provided at one end of which is in contact with the end surface of the pipe, and is inserted into a tubular joint inserted in the end portion of the pipe. In-core configured to
A protrusion extending in the axial direction of the cylindrical portion is provided on the outer peripheral surface of the cylindrical portion, and when the end surface of the pipe comes into contact with the inner end surface of the cylindrical portion, it is between the inner end surface of the cylindrical portion and the end surface of the pipe. An incore comprising a protrusion for forming a gap, and the protrusion is provided on a plane including an extension line of the ridge and an axis line of the cylindrical portion . The in-core according to claim 1, wherein the ridge is formed in an inclined shape that becomes higher toward a flange portion side. The in-core according to claim 1 or 2, wherein a through-hole penetrating from the outer end side to the inner end side of the flange portion is provided in the flange portion. When the in-core is inserted into the end of the pipe, the through-hole communicates with a gap between the outer peripheral surface of the cylindrical portion and the inner peripheral surface of the pipe on both sides in the circumferential direction of the cylindrical portion with the protrusion as a boundary. The in-core according to claim 3, wherein the in-core is formed.

Images