JP2019148335A - Resin tee joint - Google Patents

Abstract

To provide a resin tee joint having a new structure.SOLUTION: A resin tee joint 1 includes an integrally molded joint body 11 made of resin. The joint body 11 includes a first straight part 21 to a third straight part 23. The first straight part 21 to the third straight part 23 are respectively provided with a first lock mechanism 41 to a third lock mechanism 43 which prevent removal of a first pipe 101 to a third pipe 103 corresponding to the first lock mechanism 41 to the third lock mechanism 43. The first straight part 21 and the second straight part 22 are formed into cylindrical shapes which linearly extend in directions perpendicular to each other. The third straight part 23 is formed into a cylindrical shape which linearly extends in a direction which is 180 degrees opposite to the second straight part 22 around the first straight part 21. The third straight part 23 is located in a position which is not coaxial with the second straight part 22.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a resinous cheese joint.

  Non-Patent Document 1 discloses “WPT1 type cheese socket (hereinafter referred to as a resin cheese joint)” used for branching of a pipe for supplying hot water and hot water. As shown in FIG. 5, the resin cheese joint 200 includes a T-shaped joint body 201 made of resin. The joint body 201 includes a first straight part 211 to a third straight part 213 and a branching part 214. The branch part 214 connects the first straight part 211 to the third straight part 213 to each other.

Onda Manufacturing Co., Ltd. “General Catalog 2017-2018”, page 84

  The objective of this invention is providing the resin-made cheese joint of a novel structure.

  In order to achieve the above object, the invention of claim 1 comprises an integrally formed joint body made of resin, the joint body comprising a first straight portion, a second straight portion, and a third straight portion, the first straight portion. The straight portion is provided with a first locking mechanism for preventing the first pipe connected to the first straight portion from coming off, and the second straight portion is provided with a second pipe connected to the second straight portion. A second locking mechanism for stopping, and a third locking mechanism for preventing a third pipe connected to the third straight portion from being detached from the third straight portion. And the second straight part are formed in a cylindrical shape extending linearly in a direction perpendicular to each other, and the third straight part is formed around the first straight part. Is a resinous cheese joint formed in a cylindrical shape extending linearly in the opposite direction of 180 degrees, and the third straight portion is disposed at a position that is not coaxial with the second straight portion. .

  According to a second aspect of the present invention, in the first aspect, the third straight portion looks at the second straight portion in the axial direction of the third pipe and looks at the outermost line at a portion of the maximum outer diameter of the third lock mechanism. Is arranged so as to overlap with the outer shape line at the portion of the maximum outer diameter of the second lock mechanism.

The longitudinal section of a resin cheese joint. The principal part enlarged view of FIG. The longitudinal cross-sectional view of the resin-made cheese joint of another example. The longitudinal cross-sectional view of the resin-made cheese joint of another example. The longitudinal cross-sectional view of the conventional resin-made cheese joint.

Hereinafter, an embodiment of a resin cheese joint will be described with reference to the drawings.
As shown in FIG. 1, the resinous cheese joint 1 connects the upstream first pipe 101 and the downstream second pipe 102 and the third pipe 103 in a T-shape in the water and hot water supply piping. belongs to. In other words, the resin cheese joint 1 is used for branching of a water supply and hot water supply pipe, and is a branch joint suitable for a so-called “dragonfly pipe”. The first pipe 101 to the third pipe 103 are made of a synthetic resin such as polybutene or cross-linked polyethylene, for example.

  The resin cheese joint 1 includes a T-shaped joint body 11 made of resin. The joint body 11 includes a first straight part 21 to a third straight part 23 and a branch part 24. The branch portion 24 is integrally formed with the first straight portion 21 to the third straight portion 23 so as to connect the first straight portion 21 to the third straight portion 23 to each other. In addition, as resin which forms the coupling main body 11, what mixed glass fiber with polyphenylene sulfide resin is mention | raise | lifted, for example.

  In the joint body 11, the first straight portion 21 and the second straight portion 22 are formed in a cylindrical shape extending linearly in a direction perpendicular to each other. The corner 31 constituting the flow path of the branch portion 24 is formed in a cylindrical inner surface curved in an arc shape so as to connect the first straight portion 21 and the second straight portion 22.

  In the joint body 11, the third straight portion 23 is formed in a cylindrical shape that is coaxial with the second straight portion 22 and extends linearly in a direction perpendicular to the first straight portion 21. The straight 32 constituting the flow path of the branch portion 24 is formed in a cylindrical inner surface extending linearly so as to connect the outside of the corner 31 and the third straight portion 23.

  The first straight portion 21 is provided with a first lock mechanism 41 that prevents the first pipe 101 connected to the first straight portion 21 from coming off. The second straight portion 22 is provided with a second lock mechanism 42 that prevents the second pipe 102 connected to the second straight portion 22 from coming off. The third straight portion 23 is provided with a third lock mechanism 43 that prevents the third pipe 103 connected to the third straight portion 23 from coming off.

  The first pipe 101 and the second pipe 102 have the same size and the same inner diameter (for example, nominal diameter “16A”). The third pipe 103 is smaller than the first pipe 101 and the second pipe 102 and has a smaller inner diameter (for example, a nominal diameter “13A”).

  Therefore, in response to the size difference between the first pipe 101 and the second pipe 102 and the third pipe 103, the first straight portion 21, the second straight portion 22, and the third straight portion 23 are also locked. The mechanism 41, the second lock mechanism 42, and the third lock mechanism 43 have the same structure and different sizes. Therefore, for example, the third straight portion 23 has a smaller inner diameter than the first straight portion 21 and the second straight portion 22, and the third lock mechanism 43 has a component that is smaller than the first lock mechanism 41 and the second lock mechanism 42. Small inner diameter.

Next, the structure of the resin cheese joint 1 will be described in detail.
As shown in FIG. 2, a first communication port 24 a is provided at a boundary portion between the corner 31 of the branch portion 24 and the first straight portion 21. A second communication port 24 b is provided at a boundary portion between the corner 31 of the branch portion 24 and the second straight portion 22. A third communication port 24 c is provided at a boundary portion between the straight portion 32 of the branch portion 24 and the third straight portion 23. The first communication port 24a to the third communication port 24c have the same inner diameter.

  On the inner peripheral surfaces of the first straight portion 21 to the third straight portion 23, accommodating portions 25 for accommodating the corresponding end portions of the first pipe 101 to the third pipe 103 are provided on the portions near the branch portion 24. It has been. Step portions 26 are formed between the inner peripheral surface of each housing portion 25 and the corresponding inner peripheral surfaces of the first communication port 24 a to the third communication port 24 c in the branch portion 24. Each step part 26 and the inner peripheral surface of the corresponding first communication port 24a to third communication port 24c are substantially orthogonal to each other. The accommodating portion 25 of the third straight portion 23 has a smaller inner diameter than the accommodating portions 25 of the first straight portion 21 and the second straight portion 22.

  Cylindrical first in-core 111 to third in-core 113 made of metal are inserted into end portions of first pipe 101 to third pipe 103, respectively. The first incore 111 to the third incore 113 are immersed in the corresponding first pipe 101 to the third pipe 103 by flanges 111a to 113a formed at the end portions of the first incore 111 to the third incore 113. The contact is regulated. The first pipe 101 and the second pipe 102 are placed in the accommodating portion 25 of the corresponding first straight portion 21 or second straight portion 22 until the corresponding first incore 111 or second incore 112 abuts on the stepped portion 26. Has been inserted.

  The first incore 111 inserted into the first pipe 101 and the second incore 112 inserted into the second pipe 102 have the same inner diameter, and the inner diameters of the first communication port 24a to the third communication port 24c are the same. It is the same as the inner diameter. The third incore 113 inserted into the third pipe 103 is smaller in size than the first incore 111 inserted into the first pipe 101 and the second incore 112 inserted into the second pipe 102, and the inner diameter is the first. It is smaller than the inner diameter of the first communication port 24a to the third communication port 24c. That is, the inner diameter of the third communication port 24c (straight 32) is larger than the inner diameter of the third pipe 103 (the inner diameter of the third incore 113).

  A cylindrical guide 27 is disposed in the accommodating portion 25 of the third straight portion 23. The inner peripheral surface of the guide 27 has a tapered shape in which the inner diameter gradually decreases toward the third in-core 113 of the third pipe 103 (hereinafter referred to as a tapered surface 27a). The tapered surface 27a of the guide 27 has the same inner diameter as the third communication port 24c on the third communication port 24c side, and the same inner diameter as the third incore 113 on the third pipe 103 side. The third pipe 103 is inserted into the accommodating portion 25 of the third straight portion 23 until the third incore 113 is in contact with the step portion 26 via the guide 27.

  As shown in FIG. 1, on the inner peripheral surface of the first straight portion 21 to the third straight portion 23, between each accommodating portion 25 and the front end portion of the corresponding first straight portion 21 to third straight portion 23. Are provided with seal portions 28 each having a larger inner diameter than the accommodating portion 25. In each seal portion 28, the seal ring 51, the spacer 52, the seal ring 53, and the holding ring 54 are the same from the accommodating portion 25 side toward the distal end side of the corresponding first straight portion 21 to third straight portion 23. Arranged in order. The seal ring 51, the spacer 52, the seal ring 53, and the holding ring 54 have inner diameters of those arranged in the third straight part 23 rather than those of the first straight part 21 and the second straight part 22. Is smaller.

  When the end portions of the first pipe 101 to the third pipe 103 are inserted into the accommodating portions 25 of the corresponding first straight portion 21 to the third straight portion 23, the first pipe 101 to the third pipe 103 are sealed. 51, the spacer 52, the seal ring 53, and the holding ring 54. At this time, the seal rings 51 and 53 of each seal portion 28 are in contact with the outer peripheral surfaces of the corresponding first pipe 101 to the third pipe 103, and the water flowing in the joint body 11 is in the first pipe 101 to the third pipe. Leakage outside the resin cheese joint 1 from between the outer peripheral surface of the pipe 103 and the inner peripheral surface of the seal portion 28 is suppressed.

  The first lock mechanism 41 to the third lock mechanism 43 include a holding member 44 for holding the corresponding first pipe 101 to third pipe 103 on the corresponding first straight portion 21 to third straight portion 23, and holding A cap 45 for attaching the member 44 to the corresponding first straight portion 21 to third straight portion 23 is provided. The holding member 44 is provided with an annular lock ring 48 positioned between the fitting ring 46 and the split ring 47. Each holding member 44 is positioned adjacent to a holding ring 54 disposed on the corresponding seal portion 28.

  The cap 45 is formed in a cylindrical shape. By disposing the split ring 47 and the lock ring 48 inside the cap 45 and further fitting the fitting ring 46 inside the cap 45, the split ring 47 and the lock ring 48 do not fall out of the cap 45. In this state, the opening end of the cap 45 is engaged with the end of the corresponding first straight portion 21 to the end of the third straight portion 23 in the radial direction, thereby corresponding to the first straight portion. The first lock mechanism 41 to the third lock mechanism 43 including the holding member 44 and the cap 45 are easily assembled to the parts 21 to the third straight part 23, respectively.

  The first pipe 101 to the third pipe 103 with the first lock mechanism 41 to the third lock mechanism 43 (the holding member 44 and the cap 45) attached to the corresponding first straight part 21 to third straight part 23. When the end portion of the through hole penetrates the corresponding holding member 44 and the cap 45 and is inserted into the accommodating portion 25 from the distal end portion of the corresponding first straight portion 21 to third straight portion 23, the holding member 44 is locked. The ring 48 presses the outer peripheral surface of the corresponding first pipe 101 to third pipe 103. This prevents the first pipe 101 to the third pipe 103 from coming out of the corresponding first straight portion 21 to the third straight portion 23.

Next, the branch part 24 of the joint body 11 will be described in detail.
As shown in FIG. 2, at the corner 31 of the branch portion 24, a vertex portion 24 d is provided at an intermediate position between the first communication port 24 a and the second communication port 24 b. The inner peripheral surfaces of the first communication port 24a, the second communication port 24b, and the apex portion 24d each have a perfect circle shape. In the corner 31, the inner peripheral surface of the first communication port 24a and the inner peripheral surface of the vertex portion 24d are smoothly connected, and the inner peripheral surface of the second communication port 24b and the inner peripheral surface of the vertex portion 24d are connected. It is connected smoothly.

  In addition, the internal diameter of the 1st communicating port 24a and the 2nd communicating port 24b is larger than the internal diameter of the vertex part 24d. Therefore, the inner diameter of the corner 31 gradually increases as it goes from the apex portion 24d toward the first communication port 24a, and gradually increases as it goes from the apex portion 24d toward the second communication port 24b.

According to the present embodiment configured as described above, the following operational effects can be obtained.
(1) At the corner 31 of the branch portion 24, the inner peripheral surface is smoothly connected from the first communication port 24a to the second communication port 24b via the apex portion 24d. Therefore, pressure loss can be reduced particularly in the flow path from the first straight portion 21 to the second straight portion 22 used as the main pipe, and even if such a dragonfly pipe is frequently used as a water supply / hot water supply pipe, Insufficient flow rate.

  (2) The inner diameter of the third communication port 24c (straight 32) is larger than the inner diameter of the third pipe 103 (the inner diameter of the third incore 113). Therefore, the water flowing through the corner 31 can be guided to the third pipe 103 with a small pressure loss. That is, as shown by a two-dot chain line in FIG. 2, for example, if the inner diameter of the third communication port 24c (straight 32) is the same as the inner diameter of the third pipe 103 (the inner diameter of the third incore 113), the corner 31 and the straight 32 The angle of the corner portion X formed inside the connecting portion with the head becomes smaller.

  Therefore, when water flows from the first straight portion 21 to the third straight portion 23, vortices are easily generated around the corner portion X, and the pressure loss is increased. On the other hand, in the present embodiment, the corner portion X can be arranged close to the first communication port 24a and the angle of the corner portion X becomes large, so that the above-described vortex is hardly generated.

  (3) A guide 27 is disposed between the corner 31 of the branch portion 24 and the third pipe 103, and the guide 27 has a tapered surface 27 a that gradually reduces the inner diameter toward the third pipe 103. Yes. Therefore, the water flowing in the corner 31 can be guided more smoothly to the third pipe 103, which also contributes to reducing the pressure loss in the branch portion 24.

<Another example>
For example, the present invention can be implemented in the following modes.
The guide 27 is removed so that the third in-core 113 is in direct contact with the step portion 26, and the inner peripheral surface of the flange 113 a in the third in-core 113 is directed toward the inner side of the third pipe 103. To reduce the taper surface.

  The guide 27 is removed so that the third incore 113 is in direct contact with the stepped portion 26, and the inner peripheral surface of the straight 32 near the third communication port 24c is directed toward the third pipe 103 side. To reduce the taper surface.

  Instead of providing the first in-core 111 to the third in-core 113, the corresponding first straight portions 21 to 3 on the inner sides of the accommodating portions 25 and the seal portions 28 of the first straight portion 21 to the third straight portion 23, respectively. The inner cylinder part integrally formed with the straight part 23 is provided, and the edge part of the corresponding 1st pipe 101-3rd pipe 103 is inserted in the outer peripheral surface of the inner cylinder part.

  The inner diameters of the first communication port 24a, the second communication port 24b, and the apex 24d are the same.

  As shown in FIG. 3 or FIG. 4, the guide 27 is deleted, and the inner diameter of the third communication port 24c (straight 32) is made the same as the inner diameter of the third pipe 103 (the inner diameter of the third incore 113). .

  As shown in FIG. 3, in the branch portion 24, the straight 32 is connected at a position near the second straight portion 22, not at an intermediate position of the corner 31.

  As shown in FIG. 4, in the branch portion 24, the straight 32 is connected at a position closer to the first straight portion 21 instead of an intermediate position of the corner 31.

<Appendix>
A technical idea that can be grasped from the above embodiment will be described.
(1) A resin joint body having a branch portion integrally formed with respect to the first straight portion to the third straight portion so as to connect the first straight portion to the third straight portion, and the first Connected to the first lock mechanism that prevents the first pipe connected to the straight portion from coming off, the second lock mechanism that prevents the second pipe connected to the second straight portion from coming off, and the third straight portion And a third locking mechanism for preventing the third pipe from coming off, wherein the branch portion branches from the corner connecting the first straight portion and the second straight portion arranged at right angles, and the corner. And a straight connected to the third straight part, and at the corner, an inner peripheral surface of a first communication port with the first straight part, the first straight part and the second stress The inner peripheral surface of the apex portion between the second and the second portion and the inner peripheral surface of the second communication port with the second straight portion are each in a perfect circle shape, and the corner includes the inner periphery of the first communication port. A resin cheese joint in which a peripheral surface and an inner peripheral surface of the apex portion are smoothly connected, and an inner peripheral surface of the apex portion and an inner peripheral surface of the second communication port are smoothly connected.

(2) The first pipe and the second pipe have the same inner diameter, the third pipe has a smaller inner diameter than the first pipe and the second pipe, and the inner diameter of the straight at the branch portion is The resin-made cheese joint as described in the technical idea (1) larger than the internal diameter of a 3rd pipe.

(3) The resin cheese joint according to the technical idea (2), in which a tapered surface is formed between the corner and the third pipe to gradually reduce the inner diameter toward the third pipe.

  DESCRIPTION OF SYMBOLS 1 ... Resin cheese joint, 11 ... Joint main body, 21 ... 1st straight part, 22 ... 2nd straight part, 23 ... 3rd straight part, 24 ... Branch part, 24a ... 1st communication port, 24b ... 2nd communication Mouth, 24d ... vertex, 31 ... corner, 32 ... straight, 41 ... first locking mechanism, 42 ... second locking mechanism, 43 ... third locking mechanism, 101 ... first pipe, 102 ... second pipe, 103 ... Third pipe.

Claims (2)

An integrally formed joint body made of resin is provided. The joint body includes a first straight portion, a second straight portion, and a third straight portion, and the first straight portion is connected to the first straight portion. A first lock mechanism for preventing the removal of one pipe is provided, and the second straight portion is provided with a second lock mechanism for preventing the second pipe connected to the second straight portion, and the third straight portion is provided. The straight portion is provided with a third locking mechanism for preventing the third pipe connected to the third straight portion from coming off,
The first straight portion and the second straight portion are formed in a cylindrical shape extending linearly in a direction perpendicular to each other,
The third straight portion is a resin cheese joint formed in a cylindrical shape extending linearly in a direction 180 degrees opposite to the second straight portion around the first straight portion,
The third straight portion is a resin cheese joint disposed at a position that is not coaxial with the second straight portion.   When the third straight portion is viewed from the second straight portion in the axial direction of the third pipe, the outer shape line at the portion of the maximum outer diameter of the third lock mechanism is the maximum outer diameter of the second lock mechanism. The resin cheese joint of Claim 1 arrange | positioned so that it may overlap with the external shape line in a site | part.

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