JP6654982B2 - Joint fixing structure - Google Patents

Description

  The present invention relates to a joint fixing structure used for a siphon drainage system.

  In the siphon drainage system, a structure is disclosed in which a hanging part (vertical pipe) of a drainage pipe and a standing pipe are connected by a junction joint (see Patent Document 1). The standing pipe is provided with a collecting pipe joint, and a connecting portion is provided on a side portion of the collecting pipe joint. The drain side end of the junction is connected to this connection.

JP 2000-11262 A

  However, the connection between the junction and the connection is made by simply inserting the junction into the connection. In this case, when a positive pressure for testing is applied to the drainage pipe during the vacancy test, which is an inspection for confirming the connection state of the drainage system, there is a concern that the junction may come off from the connection part.

  An object of the present invention is to prevent a merged joint from coming out of a joint of a collecting pipe joint during a fullness test.

  The joint fixing structure according to the first aspect of the present invention connects a lower end of a vertical pipe from which drainage from a plumbing fixture falls to a vertical pipe disposed in a vertical direction of a building, and connects the vertical pipe to the vertical pipe. A joining joint having a main body connected to a connecting portion of the provided collecting pipe joint, and a fixture for fixing the joining joint to the collecting pipe joint, wherein the fixing tool includes the connecting part in the main body part. A joint holding portion extending to a position overlapping the outer periphery of the connection portion while holding the main body portion in contact with an end surface in a direction in which the connection portion is pulled out; fixing the joint holding portion to the outer periphery of the connection portion; And a tightening portion for locking the joint holding portion.

  In this joint fixing structure, the fixing tool for fixing the joining joint to the collecting pipe joint has a joint holding portion and a fastening portion. The joint holding portion contacts the end surface of the main body of the junction joint in a direction in which the main body comes off from the connecting portion, holds the main body, and extends to a position overlapping the outer periphery of the connecting portion. The fastening portion fixes the joint holding portion to the outer periphery of the connection portion and locks the joint holding portion in the direction in which the main body portion comes off. Thereby, at the time of a fullness test in which a positive pressure for testing is applied to the drain pipe, the joining joint is prevented from coming off from the connecting portion of the collecting pipe joint.

  A second aspect is the joint fixing structure according to the first aspect, wherein a flange portion is provided on the outer periphery of the connection portion, and a portion of the joint holding portion that overlaps the outer periphery of the connection portion is A locking portion is provided to be locked to the flange portion in the pull-out direction.

  In this joint fixing structure, the locking portion of the joint holding portion is locked to the flange portion of the connection portion in the direction in which the main body portion comes off from the connection portion. For this reason, coming off of the junction from the connection portion is further suppressed.

  According to a third aspect, in the joint fixing structure according to the second aspect, the fastening portion is locked to the flange portion in the pull-out direction.

  In this joint fixing structure, the fastening portion is locked to the flange portion in the direction in which the main body portion comes off from the connection portion. For this reason, coming off of the junction from the connection portion is further suppressed.

  A fourth aspect is the joint fixing structure according to the first aspect, wherein a portion of the joint holding portion that overlaps the outer periphery of the connection portion protrudes toward the outer periphery, and the joint holding portion protrudes toward the outer periphery. A projection is provided which is pressed against the outer periphery.

  In this joint fixing structure, the protrusion of the joint holding portion is pressed against the outer periphery of the connection portion by the tightening portion, so that even when the main body portion comes out of the connection portion at the time of the fullness test, the joint holding portion and the connection portion are not connected. A frictional force in the direction of pull-out occurs. For this reason, the joining joint is prevented from coming off from the connecting portion.

  ADVANTAGE OF THE INVENTION According to the joint fixing structure which concerns on this invention, in a full-vacancy test, it can suppress that a junction joint comes out of the connection part of a collecting pipe joint.

It is a sectional view showing the siphon drainage system provided with the joint fixing structure concerning a 1st embodiment. It is a perspective view showing the joint fixing structure concerning a 1st embodiment. It is an enlarged plan view showing an important section of the joint fixing structure according to the first embodiment. FIG. 2 is an exploded perspective view showing the joint fixing structure according to the first embodiment. It is an enlarged plan view showing an important section of a joint fixing structure according to a second embodiment. FIG. 6 is an enlarged side view of a contact state between a distal end of a protrusion and an outer periphery of a connection portion in the second embodiment, as viewed from the direction of arrow B in FIG. 5.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

[First Embodiment]
In FIG. 1, a joint fixing structure S <b> 1 according to the present embodiment is provided at a connection portion between a vertical pipe 12 and a vertical pipe 14 in a siphon drainage system 10.

(Siphon drainage system)
The siphon drainage system 10 is a drainage system that is provided in the building 11 and that discharges drainage from the water supply device 20 using siphon power. The building 11 is an apartment house, a detached house, a factory, or the like configured with a plurality of floors.

  The siphon drainage system 10 according to the present embodiment includes a standing pipe 12 that allows drainage to flow downward. The standpipe 12 extends in the vertical direction (longitudinal direction) of the apartment house, and penetrates the floor slab 22 on each floor of the apartment house. Each house on each floor of the apartment house is provided with a plurality of drainage devices 20 for drainage. The water basin 20 includes, for example, a kitchen sink, a sink, a washing machine, a unit bath, and the like.

  One end of a drainage introduction pipe 24 for flowing drainage discharged from the watering device 20 is connected to the watering device 20. The drainage introduction pipe 24 is provided at no gradient. The other end of the drain introduction pipe 24 is connected to a siphon drain pipe 26. In addition, a storage tank for temporarily storing drainage may be provided between the water supply device 20 and the siphon drainage pipe 26. In this case, the drainage introduction pipe 24 is disposed with a gradient such that the downstream side becomes lower.

  The siphon drainage pipe 26 includes a horizontal pulling pipe 28 provided along the floor slab 22 and the vertical pipe 14 communicating with the horizontal pulling pipe 28. The horizontal pulling pipe 28 communicates with the drainage introducing pipe 24 and is disposed on the floor slab 22 in a horizontal direction with no gradient. Not only the siphon drainage system 10 but also any non-gradient drainage system has been used to reliably install a specified gradient by a conventional drainage method in a portion provided with no gradient (gradient portion). A rigid tube need not be used, and a flexible tube can be used in consideration of workability and cost.

  The vertical pipe 14 is provided in the up-down direction (vertical direction) along the standing pipe 12. The vertical pipe 14 is connected to the merged joint 16 via a siphon drainage system joint 30, and the merged joint 16 is connected to a collecting pipe joint 32 provided on the standing pipe 12.

  Note that the horizontal drawing pipe 28 and the vertical pipe 14 are formed of drain pipes having the same diameter, and guide the drainage to the siphon drainage system joint 30 without merging with other drainage pipes on the way. The inner diameters of the horizontal drawing pipe 28 and the vertical pipe 14 are set so that drainage flows at full flow.

(Fitting fixed structure)
1 and 2, the joint fixing structure S1 according to the present embodiment includes a merging joint 16 and a fixture 18.

  The joining joint 16 connects the lower end of the vertical pipe 14 for dropping the drainage from the water circulating device 20 and the upright pipe 12 arranged in the vertical direction of the building 11. The main body part 36 (FIG. 4) of the junction joint 16 is connected to the connection part 34 of the collecting pipe joint 32 provided on the standing pipe 12.

  Specifically, the lower end of the vertical pipe 14 is connected to the vertical pipe connection part 38 of the junction joint 16 via the siphon drainage system joint 30. The main body portion 36 of the joining joint 16 is a tubular portion extending in the horizontal direction (horizontal direction), and the distal end of the main body portion 36 is open. The vertical pipe connecting portion 38 and the main body 36 communicate with each other inside the joining joint 16, and a flow path (not shown) communicating from the vertical pipe connecting portion 38 to the tip of the main body 36 is formed. The main body 36 of the merging joint 16 is inserted and connected to the connecting portion 34 of the collecting pipe joint 32. That is, the main body 36 is an insertion part for the connection part 34. The connecting portion 34 is provided with a sealing material (not shown) to ensure watertightness with the main body portion 36.

  1 to 4, the connection portion 34 is a tubular portion that protrudes from the collective pipe joint 32 in the horizontal direction. For example, a flange portion 40 is provided on the outer periphery of the distal end of the connection portion 34. The position where the flange portion 40 is provided may not be the tip of the connection portion 34.

  The fixture 18 is a member for fixing the joining joint 16 to the collective pipe joint 32, and has a U-shaped fitting 42 as an example of a joint holding portion and a fastening band 44 as an example of a fastening portion. The U-shaped fitting 42 is in contact with an end surface 46 of the main body 36 in the removal direction A from the connecting part 34 to hold the main body 36 and extend to a position overlapping the outer periphery of the connecting part 34. The U-shaped fitting 42 is made of, for example, a metal plate bent in a substantially U-shape. The U-shaped fitting 42 has a bottom portion 42A, a pair of side portions 42B, and an oblique portion 42C that connects the pair of side portions 42B and the bottom portion 42A, respectively.

  The end surface 46 of the main body 36 in the pullout direction A is formed, for example, in a planar shape and is recessed, and the bottom 42A of the U-shaped bracket 42 has a shape and a width dimension that comes into planar contact with the end surface 46. have. The bottom 42A of the U-shaped bracket 42 is engaged with an end surface 46 of the main body 36 in the pullout direction A. This makes it difficult for the U-shaped fitting 42 to come off the main body 36 even if the merged joint 16 vibrates due to, for example, the drainage falling in the vertical pipe 14 colliding with the merged joint 16. The pair of side portions 42B are formed at positions overlapping the outer periphery of the connection portion 34. As shown in FIG. 3, the length L1 of the pair of side portions 42B is longer than the sum of the width W1 of the flange portion 40, the width W2 of the fastening band 44, and the thickness W3 of the locking portion 48 described later. The length is set shorter than the length L2 (FIG. 4) of the connection portion 34.

  At the distal ends of the pair of side portions 42B, hook portions 42D protruding radially outward of the connection portion 34 are formed, respectively. The hook portion 42 </ b> D is a portion for allowing the U-shaped bracket 42 to be locked in the removal direction A by the fastening band 44.

  In the U-shaped fitting 42, a portion overlapping with the outer periphery of the connection portion 34, that is, a pair of side portions 42 </ b> B, is provided with a locking portion 48 which is locked to the flange portion 40 in the pullout direction A. The locking portion 48 is formed, for example, by forming a substantially U-shaped slit in the side portion 42B, and bending a portion surrounded by the slit at a substantially right angle radially inward of the main body portion 36. That is, the locking portion 48 is a so-called cut-and-raised portion and also a projection. Note that the locking portion 48 is not limited to being integrated with the U-shaped bracket 42, and may be a separate body.

  2 and 4, the fastening band 44 fixes the U-shaped bracket 42 to the outer periphery of the connecting portion 34 and locks the U-shaped bracket 42 in the pull-out direction A. The fastening band 44 is, for example, a hose band, and is tightened by rotating a screw 50. The fastening band 44 is locked to the flange portion 40 in the removal direction A. The fastening band 44 is tightened with the screw 50 until the diameter becomes smaller than the outer diameter of the flange portion 40.

(Action)
The present embodiment is configured as described above, and its operation will be described below. 1 to 3, in the joint fixing structure S1 according to the present embodiment, the fixing member 18 for fixing the joining joint 16 to the standing pipe 12 has a U-shaped fitting 42 and a fastening band 44. The U-shaped fitting 42 contacts the end surface 46 of the main body 36 of the joining joint 16 in the direction A in which the main body 36 is removed from the connection part 34 and holds the main body 36, and the outer periphery of the connection part 34. It extends to the overlapping position. The fastening band 44 fixes the U-shaped bracket 42 to the outer periphery of the connection portion 34 and locks the U-shaped bracket 42 in the removal direction A of the main body 36. Specifically, the hook portion 42D of the U-shaped bracket 42 is locked to the fastening band 44.

  Further, the locking portion 48 of the U-shaped fitting 42 is locked to the flange portion 40 of the connection portion 34. At this time, by restraining the opening of the U-shaped fitting 42 by the fastening band 44, the locking state of the locking portion 48 by the flange portion 40 can be maintained. Further, the fastening band 44 is locked to the flange portion 40 in the direction A in which the main body portion 36 comes off from the connection portion 34.

  Accordingly, even when a force in the disengagement direction A acts on the joining joint 16 connected to the connecting portion 34 of the collecting pipe joint 32 during the full-vacancy test in which a positive pressure for testing is applied to the drain pipe, It is possible to prevent the joining joint 16 from coming out of the connecting portion 34.

  The U-shaped fitting 42 and the fastening band 44 do not need to be removed after the completion of the vacancy test, and can be used as they are. For this reason, even at the time of normal use, at the time of cleaning the drain pipe, or the like, it is possible to prevent the joining joint 16 from coming out of the connecting portion 34.

(Modification)
The fastening band 44, which is an example of the fastening portion, is locked to the flange portion 40 in the pull-out direction A. However, if the locking portion 42 of the U-shaped bracket 42 is locked to the flange portion 40, The fastening band 44 does not have to be locked to the flange portion 40. In other words, the U-shaped fitting 42 may be fastened to the connection portion 32 by the fastening band 44 at a position away from the flange portion 40.

[Second embodiment]
5 and 6, in the joint fixing structure S2 according to the present embodiment, unlike the first embodiment, the connecting portion 34 of the collective pipe joint 32 is formed in a tubular shape having no flange portion. Therefore, there is no portion on the outer periphery of the connection portion 34 where the U-shaped bracket 42 and the fastening band 44 can be locked.

  In consideration of this, in the present embodiment, a protruding portion 52 that protrudes toward the outer periphery and is pressed against the outer periphery by the fastening band 44 is provided at a portion of the U-shaped bracket 42 that overlaps the outer periphery of the connection portion 34. ing.

  The projecting portion 52 forms a substantially U-shaped slit in the side portion 42B of the U-shaped bracket 42 in the same manner as the locking portion 48 in the first embodiment, and defines a portion surrounded by the slit as a diameter of the main body portion 36. It is formed by bending at a substantially right angle inward in the direction. That is, the protrusion 52 is a so-called cut-and-raised portion. As shown in FIG. 6, the tip of the projection 52 is formed, for example, in a saw-tooth shape, and is configured to easily generate a frictional force with the outer periphery of the connection portion 34.

  Other parts are the same as those of the first embodiment, and therefore, the same parts are denoted by the same reference numerals in the drawings, and description thereof will be omitted.

(Action)
The present embodiment is configured as described above, and its operation will be described below. 5 and 6, in the joint fixing structure S2 according to the present embodiment, the projection 52 of the U-shaped bracket 42 is pressed against the outer periphery of the connection portion 34 by the fastening band 44. Therefore, even if the main body 36 tries to come out of the connection portion 34 during the full-vacuum test, a friction force in the removal direction A is generated between the U-shaped bracket 42 and the connection portion 34. For this reason, even if the connecting portion 34 does not have a flange portion, it is possible to prevent the joining joint 16 from coming out of the connecting portion 34.

  In FIG. 5, the fastening band 44 is arranged at a position different from the projection 52, but the fastening band 44 may be arranged at a position overlapping the projection 52. This is because the protruding portion 52 can be more strongly pressed against the connecting portion 34.

  Further, the protrusion 52 is not limited to the cut-and-raised portion, and may be one in which a friction material such as rubber is attached to the side portion 42B of the U-shaped bracket 42. That is, the protrusion 52 is not limited to being integrated with the U-shaped bracket 42 and may be a separate body.

[Other embodiments]
As described above, an example of the embodiment of the present invention has been described. However, the embodiment of the present invention is not limited to the above, and other than the above, various modifications can be made without departing from the gist of the present invention. Of course there is.

  Although the U-shaped fitting 42 has been described as an example of the joint holding part, the joint holding part is not limited to this, and holds the main body 36 by contacting the end surface 46 of the main body 36 in the removal direction A from the connection part 34. , As long as it extends to a position overlapping the outer periphery of the connection portion 34.

  The fastening band 44 has been described as an example of the fastening portion, but the fastening portion is not limited to this, and any fastening member that can fix the joint holding portion to the outer periphery of the connection portion 34 and lock the U-shaped fitting 42 in the pullout direction A can be used. Good.

  In the first embodiment, the locking portion 48 is provided on the U-shaped fitting 42 (joint holding portion). However, if the fastening band 44 (fastening portion) is locked on the flange portion 40, It is not necessary to provide the locking part 48 in the metal fitting 42.

DESCRIPTION OF SYMBOLS 11 ... Building, 12 ... Stand pipe, 14 ... Vertical pipe, 16 ... Merging joint, 18 ... Fixture, 20 ... Water plumbing equipment, 32 ... Collective pipe joint, 34 ... Connection part, 36 ... Body part, 40 ... Flange Part, 42: U-shaped fitting (joint holding part), 44: fastening band (tightening part), 46: end face, 48: locking part, 52: protrusion, A: pull-out direction, S1: joint fixing structure, S2 ... Joint fixing structure

Claims (4)

The lower end of the vertical pipe for dropping the drainage from the water circulating device is connected to a vertical pipe arranged in the vertical direction of the building, and the main body is connected to a connecting portion of a collecting pipe joint provided on the vertical pipe. Joints that are
A fixture for fixing the merging joint to the collecting pipe joint,
The fixture includes a joint holding portion that extends to a position overlapping the outer periphery of the connection portion while holding the main body portion by contacting an end surface of the body portion in a direction in which the connection portion comes off from the connection portion. A joint fixing structure fixed to the outer periphery of the connecting portion and a fastening portion for locking the joint holding portion in the detaching direction. A flange portion is provided on the outer periphery of the connection portion,
The joint fixing structure according to claim 1, wherein a portion of the joint holding portion that overlaps the outer periphery of the connection portion is provided with a locking portion that is locked to the flange portion in the pull-out direction.   The joint fixing structure according to claim 2, wherein the fastening portion is locked to the flange portion in the removal direction.   2. The joint holding portion, wherein a portion overlapping the outer periphery of the connection portion is provided with a projection that projects toward the outer periphery and is pressed against the outer periphery by the fastening portion. 3. Joint fixing structure.

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