JP6390640B2 - Piping system - Google Patents

Description

The present invention relates to a piping system comprising a pipe to be inserted into a through hole formed in the wall, and a joint that is connected to both ends of the pipe.

  For example, when piping through a building wall for renovation of a building, etc., construct a piping system that includes a pipe that is inserted through a through-hole formed in the wall and a joint that is connected to each end of the pipe. There are things to do. Examples of the joint include an elbow-shaped joint, a T-shaped joint, and a joint in which a seat is integrally formed at one end of a cylindrical main body.

  In general, the inner diameter of the through hole is set as small as possible so that the pipe and the end of the joint to which the pipe is connected can be inserted, and thus the entire joint cannot be inserted into the through hole. Therefore, conventionally, at the time of construction, first, a pipe having one joint connected to one end thereof is inserted into the through hole from one opening of the through hole to the other end of the pipe. Subsequently, the other joint end is inserted from the other opening of the through hole so as to connect the other joint to the other end of the pipe. In this case, for the purpose of assisting the connection work inside the narrow through hole, for example, a one-touch type joint described in Patent Document 1 may be used as the other joint. The connection port at the end of the joint described in Patent Document 1 is provided with a retaining ring, and when a pipe is inserted into the connection port, the outer peripheral surface of the pipe is locked by the ring. Thus, the joint is connected to the pipe.

JP 2009-180258 A

  By the way, in the conventional piping system and the construction method of the piping system, the connection work between the pipe and the joint is performed inside the through hole. Therefore, even when the one-touch type joint described in Patent Document 1 is used, the operator cannot visually confirm whether or not the pipe and the joint are properly connected. It is something that leaves room.

An object of the present invention is to provide a pipe system which can be confirmed whether or not the pipe and fitting are properly connected.

  A piping system for achieving the above object includes a pipe inserted through a through-hole formed in a wall, and a first joint that is connected to a first end of the pipe and projects outward from a first opening of the through-hole. And a second joint having a joint body to which the second end of the pipe is connected, and a seat member detachably provided to a portion projecting outside from the second opening of the through hole in the joint body. The first joint has a shape that cannot be entirely inserted into the through hole, and the portion of the second joint that protrudes outside from the second opening in the joint body is the through hole. The seat member has a shape that cannot be inserted entirely into the through hole.

  Moreover, the construction method of the piping system for achieving the above object is a method of constructing the piping system, wherein the first joint is connected to the first end of the pipe and the second end of the pipe. The joint body of the second joint is connected to form a partial connection body, and the partial connection body extends from the first opening of the through hole to the joint body of the second joint in front of the through hole. The seat member is attached to a portion of the joint body that protrudes to the outside from the second opening of the through hole.

  According to the above configuration or the above method, the second joint is separable into the joint main body and the seat member, and the portion projecting to the outside from the second opening in the joint main body can be inserted into the through hole. have. For this reason, the partial connection body formed by connecting the first joint to the first end of the pipe and connecting the joint body of the second joint to the second end of the pipe is connected to the second joint from the first opening of the through hole. It is possible to insert the seat member into a portion projecting from the second opening of the through hole in the joint body through the joint body. Therefore, the connection work between both ends of the pipe and both joints can be performed outside the through hole.

  As the first joint, for example, a joint having an outer diameter larger than the inner diameter of the through hole, such as a joint in which a seat portion is integrally formed, a T-shaped joint, or an elbow-shaped joint. What has the part which protruded in the radial direction rather than the through-hole is mentioned.

  According to the present invention, it is possible to confirm whether or not the pipe and the joint are properly connected.

Sectional drawing of the whole piping system of the constructed state about one Embodiment of a piping system. The disassembled perspective view of the joint main body, packing, seat member, lock nut, and screw of the second joint in the same embodiment. (A)-(c) is sectional drawing which shows the first half of the construction procedure of the piping system in the embodiment. (A)-(c) is sectional drawing which shows the second half of the construction procedure of the piping system in the embodiment. (A) is a front view centering on the 2nd joint in a modification, (b) is sectional drawing centering on the 2nd joint in a modification.

Hereinafter, an embodiment will be described with reference to FIGS.
As shown in FIG. 1, the wall of a building has a first wall 71 and a second wall 72 that are opposed to each other with a space therebetween. In the first wall 71 and the second wall 72, a first through hole 81 and a second through hole 82 having a circular cross section are formed on the same axis.

  In the piping system of the present embodiment, the pipe 30 inserted through the through holes 81 and 82 and the first end 31 of the pipe 30 are connected, and project from the first opening 91 of the first through hole 81 to the outside of the first wall 71. The elbow-shaped first joint 10 and the second end 32 of the pipe 30 are connected to each other, and the second joint 20 with a seat protruding from the second opening 92 of the second through hole 82 to the outside of the second wall 72 is provided. Yes.

Next, each configuration of the piping system will be described in detail.
<Pipe 30>
As shown in FIGS. 1 and 2, the pipe 30 has a cylindrical shape and is formed of a synthetic resin material such as cross-linked polyethylene or polybutene. The pipe 30 is cut to a predetermined length corresponding to the distance between the first wall 71 and the second wall 72.

<First joint 10>
As shown in FIG. 1, the first joint 10 has a cylindrical main body 11 bent at a right angle. An inner cylinder 121 and an outer cylinder 122 are formed at the first end 12 of the main body 11. Further, an inner cylinder part 131 and an outer cylinder part 132 are formed at the second end 13 of the main body 11.

  In the present embodiment, since the first end portion 12 and the second end portion 13 have the same shape, the first end portion 12 will be described below to explain the second end portion 13. A duplicate description is omitted.

  The inner cylinder part 121 and the outer cylinder part 122 which comprise the 1st end part 12 make a double-pipe structure, and are the base end sides of the axial direction (it is the right side of the figure, and are only hereafter called a base end side). Are connected to each other.

The outer cylinder part 122 protrudes from the inner cylinder part 121 to the front end side in the axial direction (the left side in the figure, hereinafter simply referred to as the front end side).
The inner peripheral surface of the inner cylinder portion 121 has a reduced diameter portion 123 located on the proximal end side and an enlarged diameter portion 124 adjacent to the distal end side of the reduced diameter portion 123 and having an inner diameter larger than the reduced diameter portion 123. A step 125 is formed between the reduced diameter portion 123 and the enlarged diameter portion 124.

  An O-ring 15 and a first restriction ring 16 that restricts the movement of the O-ring 15 toward the distal end side are fitted into the enlarged diameter portion 124. The movement of the O-ring 15 toward the base end side is restricted by the step portion 125.

A cylindrical cap 14 is fitted on the inner cylinder 121. On the inner peripheral surface of the cap 14, a tapered portion 141 having a diameter reduced toward the tip side is formed.
Between the front end surface of the inner cylinder part 121 and the inner peripheral surface of the cap 14 facing the front end surface, a second restriction that restricts movement of the lock ring 17, the proximal end side of the lock ring 17 and the radial direction A ring 18 and a split ring 19 that can expand and contract in the radial direction are provided.

A cylindrical cover 145 is fitted on the outer peripheral surface of the base end portion of the cap 14.
Between the outer peripheral surface of the outer cylindrical portion 122 and the inner peripheral surface of the reduced diameter portion 123 of the inner cylindrical portion 121, the cylindrical guide member 101 and the first end 31 of the pipe 30 are sequentially inserted from the proximal end side. ing.

  Here, when the pipe 30 is about to move to the front end side with respect to the first joint 10, the lock ring 17 digging into the outer peripheral surface of the pipe 30 tends to move together with the pipe 30 to the front end side. At this time, the split ring 19 is pushed by the lock ring 17 and moves to the tip side, but the split ring 19 is reduced in diameter by the tapered portion 141 on the inner peripheral surface of the cap 14 and bites into the pipe 30. This prevents the pipe 30 from coming off from the first joint 10.

  The guide member 101 is disposed between the lock ring 17 and the split ring 19 in the axial direction in a state where the pipe 30 is not connected to the first joint 10. For this reason, when the pipe 30 is inserted into the connection port of the first joint 10, the guide member 101 is pushed by the first end 31 of the pipe 30 and the lock ring 17 and the split ring 19 are moved to the outer peripheral side by the guide member 101. The insertion of the pipe 30 is guided by being spread out.

Further, the space between the outer peripheral surface of the pipe 30 and the enlarged diameter portion 124 of the inner cylinder portion 121 is sealed by the O-ring 15.
In this way, the first end 31 of the pipe 30 is connected to the first end 12.

  On the other hand, the second end 13 of the main body 11 is directed downward on the outside of the first wall 71. The upper end of a pipe 130 similar to the pipe 30 is connected to the second end portion 13. An annular guide member 101 similar to the first end portion 12 is inserted in front of the upper end of the pipe 130 in the insertion direction of the pipe 130 (upward in the figure).

The length of the first joint 10 in the vertical direction is larger than the inner diameters of the through holes 81 and 82. That is, the first joint 10 has a shape that cannot be entirely inserted into the through holes 81 and 82.
<Second joint 20>
As shown in FIG. 1, the second joint 20 includes a cylindrical joint body 21 having a linear axis, and a male screw 221 formed on the outer peripheral surface of the distal end portion (left end portion in the figure) of the joint body 21. And a disk-shaped seat member 28 screwed together.

The joint body 21 includes a cylindrical tube body 22 and a holding ring 23 screwed into a base end portion (right end portion in the figure) of the tube body 22.
A female screw 222 for screwing and attaching a male screw such as a water tap (not shown) is formed on the inner peripheral surface of the distal end portion of the cylindrical body 22. Further, on the inner peripheral surface of the cylindrical body 22, a protrusion 223 is formed over the entire circumference adjacent to the proximal end side of the female screw 222.

A pair of O-rings 24 are respectively fitted in the pair of concave grooves formed on the inner peripheral surface of the cylindrical body 22.
Between the front end surface of the holding ring 23 and the inner peripheral surface of the cylindrical body 22 facing the front end surface, a pair of lock rings 25 and a pair of lock rings 25 are provided between the lock rings 25. A spacer 26 is provided to maintain the interval.

  A cylindrical in-core 27 having a flange 271 at the tip is inserted into the joint main body 21 from an opening on the proximal end side of the joint main body 21. Movement of the in-core 27 toward the tip side is restricted by the protrusion 223 on the inner peripheral surface of the cylindrical body 22.

  A second end 32 of the pipe 30 is inserted between the outer peripheral surface of the in-core 27 and the inner peripheral surface of the cylindrical body 22. Here, the outer peripheral surface of the pipe 30 is locked by the pair of lock rings 25. Further, the space between the outer peripheral surface of the pipe 30 and the inner peripheral surface of the cylindrical body 22 is sealed by the O-ring 24. In this way, the second end 32 of the pipe 30 is connected to the joint body 21. At this time, the male screw 221 protrudes from the second opening 92 of the second through hole 82 to the outside.

  As shown in FIGS. 1 and 2, a female screw hole 281 that is screwed into the male screw 221 is formed at the center of the seat member 28. The seat member 28 is formed with a plurality (three in this embodiment) of screw holes 29 at equal intervals in the circumferential direction.

  As shown in FIG. 1, the maximum outer diameter of the joint body 21 of the second joint 20 is smaller than the inner diameters of the through holes 81 and 82. That is, the joint main body 21 has a shape that allows the whole to be inserted into the through holes 81 and 82.

Further, the outer diameter of the seat member 28 is larger than the inner diameters of the through holes 81 and 82. That is, the seat member 28 has a shape that cannot be entirely inserted into the through holes 81 and 82.
<Packing 40 and lock nut 50>
As shown in FIG. 1, a packing 40 formed of synthetic rubber or synthetic resin is interposed between the surface of the second wall 72 and the seat member 28.

  As shown in FIG.1 and FIG.2, the sheet | seat part 41 of the packing 40 has comprised the disk shape. The outer diameter of the seat portion 41 is slightly smaller than the outer diameter of the seat member 28. A central hole 42 having an inner diameter larger than the outer diameter of the male screw 221 is formed at the center of the seat portion 41. In addition, a plurality of screw holes 43 are formed in the seat portion 41 at equal intervals in the circumferential direction corresponding to a plurality (three in this embodiment) of screw holes 29 of the seat member 28.

  On the outer peripheral edge of the sheet portion 41, a removal planned portion 44 that protrudes to the outer peripheral side is formed integrally with a fragile portion 45. The to-be-removed portion 44 is formed at a position biased in the circumferential direction with respect to the screw hole 43 (in this embodiment, an intermediate position between two screw holes 43 adjacent in the circumferential direction). The fragile portion 45 has a smaller cross-sectional area than other portions.

  A plurality of screws 61 are inserted through the screw holes 29 and 43 of the seat member 28 and the packing 40, respectively. The seat member 28, that is, the second joint 20 is fixed to the second wall 72 by screwing the plurality of screws 61 into the second wall 72.

  A lock nut 50 is screwed onto the male screw 221 from the outside of the seat member 28. The lock member 50 restricts the seat member 28 from moving relative to the joint body 21 in the axial direction.

Next, with reference to FIG.3 and FIG.4, the construction procedure of the piping system of this embodiment is demonstrated.
As shown in FIG. 3A, the worker first connects the first joint 10 to the first end 31 of the pipe 30 and connects the joint body 21 of the second joint 20 to the second end 32 of the pipe 30. Thus, the partial connection body S is formed. At this time, prior to the connection between the pipe 30 and the first joint 10, marking is performed on the outer peripheral surface of the end portion of the pipe 30 at a position corresponding to the insertion depth inserted into the first joint 10. Then, after inserting the pipe 30 into the connection port of the first joint 10, the pipe 30 and the first joint 10 are visually confirmed that the marking is inserted to the position of the connection port of the first joint 10. Make sure that and are connected properly. The same applies to the connection confirmation between the pipe 30 and the joint body 21 of the second joint 20.

Moreover, the partial connection body S is extended toward the front end side by screwing the cylindrical guide plug 55 into the female thread 222 of the joint body 21.
Next, as shown in FIGS. 3 (b) and 3 (c), the partial connection body S is placed in front of the joint body 21 of the second joint 20 from the first opening 91 (strictly, the guide plug 55 is placed). Insert the through-holes 81 and 82 before). As a result, the guide plug 55 and the external thread 221 of the joint body 21 protrude from the second opening 92 to the outside of the second wall 72.

  Next, as shown in FIG. 4A, the packing 40 is externally inserted into the male screw 221 of the joint body 21 while being guided by the guide plug 55, and the seat member 28 is screwed. At this time, the seat portion 41 of the packing 40 is sandwiched between the second wall 72 and the seat member 28, while the removal planned portion 44 extends outward from between the second wall 72 and the seat member 28. .

  Therefore, the operator displaces the packing 40 in the circumferential direction or the radial direction while picking the portion to be removed 44 with a finger until the plurality of screw holes 43 coincide with the plurality of screw holes 29 of the seat member 28. 40 position adjustment is performed.

  Next, as shown in FIG. 4B, the plurality of screws 61 are inserted into the seat member 28 and the plurality of screw holes 29, 43 of the packing 40 and screwed into the second wall 72, respectively. Is fixed to the second wall 72. Next, although not shown, the lock nut 50 is screwed into the male screw 221 of the joint body 21 while being guided by the guide plug 55.

  Next, as shown in FIG. 4C, the guide plug 55 is removed from the joint body 21. In addition, the weakened portion 45 is broken and removed from the sheet portion 41 by picking the planned removal portion 44 of the packing 40 with a finger and pulling it strongly.

According to the piping system and the piping system construction method according to the present embodiment described above, the following effects can be obtained.
(1) In the piping system, the pipe 30 inserted through the through holes 81 and 82 formed in the walls 71 and 72 and the first end 31 of the pipe 30 are connected, and the first opening 91 of the first through hole 81 is connected. A first joint 10 protruding outward is provided. In addition, the piping system is detachably provided to the joint body 21 to which the second end 32 of the pipe 30 is connected and to a portion of the joint body 21 that protrudes outside from the second opening 92 of the second through hole 82. A second joint 20 having a seat member 28 is provided. The first joint 10 has a shape that cannot be entirely inserted into the through holes 81 and 82. The joint body 21 of the second joint 20 has a shape that can be entirely inserted into the through holes 81 and 82, and the seat member 28 has a shape that cannot be entirely inserted into the through holes 81 and 82. Yes.

  According to such a configuration, the second joint 20 can be separated into the joint main body 21 and the seat member 28, and the joint main body 21 has a shape that can be entirely inserted into the through holes 81 and 82. Yes. For this reason, the partial connection body S is inserted into the through holes 81 and 82 from the first opening 91 of the first through hole 81 in front of the joint body 21 of the second joint 20, and the second through hole 82 in the joint body 21 is inserted. The seat member 28 can be attached to a portion protruding from the second opening 92. Therefore, the connection work between both ends 31 and 32 of the pipe 30 and the joints 10 and 20 can be performed outside the through holes 81 and 82. Therefore, it is possible to confirm whether or not the both ends 31 and 32 of the pipe 30 and the joints 10 and 20 are properly connected.

  (2) The removal scheduled portion 44 is connected to the outer peripheral edge of the sheet portion 41 of the packing 40. For this reason, the operator can easily adjust the position of the packing 40 by displacing the packing 40 in the circumferential direction or the radial direction while picking the portion to be removed 44 with a finger. Further, after the second joint 20 is fixed to the second wall 72, the removal planned portion 44 is removed from the sheet portion 41, so that it is possible to suppress the appearance of the construction site from being damaged by the planned removal portion 44.

  (3) The scheduled removal portion 44 is connected to the sheet portion 41 via the fragile portion 45. For this reason, when the removal planned portion 44 is picked and pulled by a finger, the fragile portion 45 is preferentially broken. Therefore, it is possible to reliably remove the planned removal portion 44 from the sheet portion 41.

  (4) The construction method of the piping system is such that the first joint 10 is connected to the first end 31 of the pipe 30 and the joint body 21 of the second joint 20 is connected to the second end 32 of the pipe 30. Form. Further, the partial connection body S is inserted into the through holes 81 and 82 from the first openings 91 of the through holes 81 and 82 in front of the joint body 21 of the second joint 20, and the through holes 81 and 82 in the joint body 21 are inserted. The seat member 28 is attached to a portion protruding from the second opening 92 to the outside.

According to such a method, the same effect as the effect (1) can be obtained.
Moreover, according to the said method, since the presence or absence of the leak in the partial connection body S can be test | inspected before inserting the said partial connection body S through a wall, the reliability with respect to the leakage of a piping system can be improved. .

  (5) Prior to inserting the partial connection body S into the through holes 81 and 82, the cylindrical guide plug 55 is screwed into the female thread 222 of the joint body 21. Thereby, since the partial connection body S is extended toward the front end side, the front end of the partial connection body S can easily face the second through hole 82, and the partial connection body S can be easily inserted into the second through hole 82. can do.

  Further, when the packing 40 is extrapolated to the male screw 221 of the joint body 21 or when the seat member 28 and the lock nut 50 are screwed together, the packing 40, the seat member 28 and the lock nut 50 are guided by the guide plug 55, respectively. Is done. For this reason, construction of packing 40, seat member 28, and lock nut 50 can be performed easily.

<Modification>
In addition, the said embodiment can also be changed as follows, for example.
-In above-mentioned embodiment, it illustrated about the structure which the joint main body 21 of the 2nd joint 20 has a shape which can be penetrated in the inside of the through-holes 81 and 82. FIG. However, the shape of the joint body according to the present invention is not limited to this, and at least a portion of the joint body that protrudes outside from the second opening 92 has a shape that can be inserted into the through holes 81 and 82. It only has to be.

  In the above embodiment, the present invention is applied to the building wall constituted by the first wall 71 and the second wall 72. However, the present invention is similarly applied to one, or three or more walls. Can be applied.

  -You may extend the external thread 221 so that the external thread 221 of the coupling main body 21 may protrude in the front end side rather than the lock nut 50. FIG. In an actual construction site, the distance between the first wall 71 and the second wall 72 may be different from the design value. Further, as described above, the pipe 30 may be so-called precut that is cut into a predetermined length in advance. Even in such a case, if the male screw 221 is extended as described above, the axial direction of the joint body 21 and the seat member 28 according to the actual distance between the first wall 71 and the second wall 72. The relative position at can be adjusted.

The guide plug 55 can be omitted.
-The 1st coupling 10 is not limited to an elbow-shaped coupling. The first joint only needs to have a shape that cannot be entirely inserted into the through hole. For example, a T-shaped joint or a joint in which the seat is integrally formed, that is, the seat is separated. It is also possible to employ joints that cannot be used.

  -The engagement aspect of the seat member 28 and the coupling main body 21 is not limited to the screwing of the internal thread hole 281 and the external thread 221. For example, as shown in FIGS. 5A and 5B, the seat member 28A is extrapolated to the joint body 21, and a C-shaped snap is inserted into the annular groove 224 formed on the outer peripheral surface of the joint body 21. The ring 65 can be externally fitted and brought into contact with the seat member 28A. In this case, it is preferable that the shape of the central hole of the seat member 28A and the outer peripheral shape of the joint body 21 be non-circular in order to restrict the relative rotation between the joint body 21 and the seat member 28A. In addition, the non-circular shape may be a polygonal shape or an oval shape. In this case, the snap ring 65 can restrict the seat member 28A from moving relative to the joint body 21 in the axial direction.

  DESCRIPTION OF SYMBOLS 10 ... 1st coupling, 101 ... Guide member, 11 ... Main body, 12 ... 1st edge part, 121 ... Inner cylinder part, 122 ... Outer cylinder part, 123 ... Reduced diameter part, 124 ... Expanded diameter part, 125 ... Step part , 13 ... second end part, 131 ... inner cylinder part, 132 ... outer cylinder part, 14 ... cap, 141 ... taper part, 145 ... cover, 15 ... O-ring, 16 ... first regulating ring, 17 ... lock ring, DESCRIPTION OF SYMBOLS 18 ... 2nd restriction ring, 19 ... Split ring, 20 ... 2nd coupling, 21 ... Joint main body, 22 ... Cylindrical body, 221 ... Male screw, 222 ... Female screw, 223 ... Projection, 224 ... Annular groove, 23 ... Holding ring , 24 ... O-ring, 25 ... lock ring, 26 ... spacer, 27 ... in-core, 271 ... buttock, 28, 28A ... seat member, 281 ... female screw hole, 29 ... screw hole, 30, 130 ... pipe, 31 ... 1 end, 32 ... 2nd end, 40 ... packing, 41 Sheet part 42 ... Center hole 43 ... Screw hole 44 ... Planned removal part 45 ... Fragile part 50 ... Lock nut 55 ... Guide plug 61 ... Screw 65 ... Snap ring 71 71 First wall 72 ... 2nd wall, 81 ... 1st through-hole, 82 ... 2nd through-hole, 91 ... 1st opening, 92 ... 2nd opening, S ... Partially connected body.

Claims (1)

A synthetic resin pipe inserted through a through-hole formed in the wall;
A first joint connected to the first end of the pipe and projecting outward from the first opening of the through hole;
A second joint having a joint main body to which a second end of the pipe is connected, and a seat member provided detachably with respect to a portion projecting outside from the second opening of the through hole in the joint main body; Prepared,
The first joint has a shape that cannot be entirely inserted into the through hole,
The portion of the second joint that protrudes from the second opening to the outside of the joint body has a shape that can be inserted into the through hole, and the seat member cannot be entirely inserted into the through hole. shape have a,
A maximum outer diameter of the joint body of the second joint is smaller than a maximum outer diameter of a portion inserted and arranged in the through hole in the first joint;
Piping system.

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