JP4515170B2 - Desorption joint for underfloor drain pipe - Google Patents

Description

  The present invention relates to a detachable joint for an underfloor drain pipe, and more particularly, to a detachable joint for an underfloor drain pipe capable of increasing the opening / closing torque by the lever principle and preventing the outer diameter of a union nut from becoming larger than necessary. It is.

Conventionally, the drainage basin installed in the residential land etc. is for each water pipe that is extended from each drainage facility of the building built in this residential land, such as bath, kitchen, toilet, washroom, laundry, etc. Are installed in each. For this reason, when a residential land is narrow and there is not enough piping place for installing the drainage basin in a residential land, installation of a drainage basin becomes difficult.
Furthermore, when installing these drainage basins in a place away from the building, piping work when installing these drainage basins becomes complicated.

In order to solve these problems, in recent years, an underfloor drain pipe structure in which drainage basins (drainage headers) are installed together under the floor of a building has been proposed (see Patent Document 1).
In this underfloor drain pipe structure, the drain pipe is piped in a state exposed under the floor of the building.

By the way, in an ordinary building, an opening is formed by cutting out a part of the fabric foundation so that an operator can dive under the floor and move to an arbitrary position under the floor for under-floor inspection or the like. However, the drain pipe crosses the opening, and the drain pipe at the position of the opening obstructs the movement of the operator when the underfloor inspection is performed.
JP 2002-276018 A

Therefore, the present applicant has proposed a method of securing a maintenance route by making a part of the drain pipe removable, but when using a union-type pipe joint for connecting pipes to each other, The screw may become hard and cannot be opened by hand force alone. In addition, the small work environment under the floor makes it difficult to apply force, increasing the need for tools.
However, tools such as spanners and adjustable wrench that can be used normally cannot be used under the floor because of the large screw size for drainage pipes. Therefore, it is necessary to be able to open and close with a small tool such as a screwdriver. It becomes.
Further, as shown in FIGS. 2C to 2D, when the insertion ring 61 of the driver shaft 7 is simply provided on the outer peripheral portion of the union nut 6, the outer diameter of the union nut 6 becomes large, and the drainage It is necessary to design the outer diameter as small as possible because it easily interferes with the surroundings of the pipe (foundation floor, joist, large draw, etc.).

  The present invention has been made in view of the above-described problems of the conventional desorption joint for underfloor drain pipes, and it is possible to increase the opening / closing torque by the lever principle and to prevent the union diameter of the union nut from becoming unnecessarily large. The object is to provide a detachable joint for pipes.

In order to achieve the above object, the desorption joint of the underfloor drain pipe of the present invention is a union-type pipe joint that removably connects a part of the drain pipe piped under the floor, and is provided with a union screw. A receiving port, another pipe receiving port joined to the pipe receiving port, and a union nut for fastening the pipe receiving port to the union screw side, from the end of the union nut to the periphery of the pipe receiving port, between the pipe socket, at intervals a plurality of projections in the axial direction so as to have a plurality of cuts and the axial air gap which is open via one end of the peripheral surface to extend in the gap A shaft such as a screwdriver is inserted through adjacent cuts .

  In this case, a groove portion that engages with the hook wrench claw can be formed on the outer peripheral portion of the union nut.

According to the desorption joint of the underfloor drain pipe of the present invention, it is a union type pipe joint that removably connects a part of the drain pipe piped under the floor, and a pipe receiving port provided with a union screw, Another pipe socket joined to the pipe socket, and a union nut that fastens the pipe socket to the union screw side, and from the end of the union nut around the pipe socket, during, at intervals a plurality of projections in the axial direction so as to have a plurality of cuts and the axial air gap which is open via one end of the peripheral surface is extended, the driver through cuts adjacent to the air gap Since the shaft such as a screwdriver is inserted into the inner space through the cut of the adjacent protrusion, the opening and closing torque can be increased by the lever principle. Because it extends in the axial direction, The outer diameter of N'natto can be prevented from becoming larger than necessary.

  In addition, the hook wrench can be used by forming a groove portion that engages the hook wrench claw on the outer periphery of the union nut.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a desorption joint for an underfloor drain pipe according to the present invention will be described with reference to the drawings.

  1 to 4 show an embodiment of an underfloor drain pipe structure to which a desorption joint for an underfloor drain pipe according to the present invention is applied.

  The underfloor drain pipe desorption joint 1 is a union-type pipe joint that removably connects a part 21 of the drain pipe 2 piped under the floor, and includes a pipe receiving port 4 provided with a union screw 3, A flanged pipe receiving port 5 joined to the pipe receiving port 4 and a union nut 6 for fastening the flange 51 of the flanged pipe receiving port 5 to the union screw 3 side are provided. A plurality of protrusions 8 are extended in the axial direction with a space for inserting a shaft 7 such as a driver between the flanged pipe receiving port 5 (or the pipe receiving port) and the flanged pipe receiving port 5. ing.

The protrusion 8 is composed of four pieces having a width slightly smaller than the diameter of the flanged pipe receiving port 5, and is arranged at a predetermined interval so that the shaft 7 such as a driver can be inserted in the tangential direction of the flanged pipe receiving port 5. The outer side is formed in a circular arc shape, and the inner side is formed in a plane parallel to the tangent line of the pipe receiving port.
When the detachable joint 1 is opened using the protrusions 8, as shown in FIG. 2 (a), when the driver shaft 7 is inserted and turned, the pipe receiving member whose intermediate portion of the driver shaft 7 serves as a fulcrum is used. While contacting with the opening | mouth 5, the base end side of the driver shaft 7 is contact | abutted to the width direction edge part of the protrusion 8 used as an action point.
Further, as shown in FIG. 2B, a plurality of groove portions 10 with which the hooks of the hook wrench 9 are engaged are formed at equal intervals in the outer circumferential portion of the union nut 6.

As shown in FIGS. 3 to 4, the desorption joint 1 for the underfloor drain pipe is formed so that an operator can move under the floor in the cloth foundation B built along the plane figure of the building. With respect to the drainage pipe 2 piped across the opening Bh, the drainage pipe 21 piped to the portion corresponding to the cloth base opening position can be removed, and the removable drainage pipe 21 can be simply It removes so that an operator can freely move under the floor through the cloth foundation opening Bh.
In addition, after the work is completed, the drainage pipe 21 that has been removed can be easily attached again via the detachable joint 1 so as to improve workability in a narrow space under the floor.

Thus, the desorption joint 1 for the underfloor drain pipe of the present embodiment is a union pipe joint in which a part 21 of the drain pipe 2 piped under the floor is detachably connected. 4, another pipe receiving port 5 joined to the pipe receiving port 4, and a union nut 6 that fastens the pipe receiving port 5 to the union screw 3 side. Since a plurality of protrusions 8 are extended in the axial direction around the port 4 or 5 with a space for inserting a shaft 7 such as a driver between the pipe receiving port 4 or 5, FIG. ) By inserting a shaft 7 such as a screwdriver into the inside of the protrusion 8 from the cut line, the opening / closing torque can be increased by the lever principle, and the protrusion 8 extends in the axial direction. Therefore, make sure that the outer diameter of the union nut 6 does not become larger than necessary. It is possible.
Further, by forming the groove portion 10 in which the hook of the hook wrench 9 engages on the outer periphery of the union nut 6, the hook wrench 9 can be used as shown in FIG.

  As mentioned above, although the desorption joint of the underfloor drainage pipe of the present invention was explained based on the example, the present invention is not limited to the composition described in the above-mentioned example, and suitably in the range which does not deviate from the meaning. The configuration can be changed.

  The desorption joint of the underfloor drain pipe of the present invention can increase the opening and closing torque by the lever principle and can prevent the outer diameter of the union nut from becoming unnecessarily large. It can be suitably applied to a drain pipe structure.

The desorption joint of the underfloor drain pipe of this invention is shown, (a) is the perspective view, (b) is the front view which shows the state which connected the drain pipe, (c) is the front view which shows the state which removed the drain pipe is there. The detachable joint of the Example and the comparative example are shown, (a) is a front view showing a state opened by a shaft of a detachable joint driver of the example, (b) is a front view showing a state opened by the hook wrench, ) Is a sectional view showing a desorption joint of a comparative example, and (d) is a front view of the same. It is a top view in the case of showing an underfloor drain pipe and piping along the opening part of a cloth foundation. It is the longitudinal section front view.

DESCRIPTION OF SYMBOLS 1 Detachable joint 2 Drain pipe 21 Removable drain pipe 3 Union screw 4 Piping receptacle 5 Flange receptacle 51 Flange 6 Union nut 7 Shaft of driver etc. 8 Protrusion 9 Hook wrench 10 Groove B Fabric foundation Bh For work or inspection Opening for

Claims (2)

A union-type pipe joint that removably connects a part of a drain pipe piped under the floor, and a pipe receptacle provided with a union screw, and another pipe receptacle joined to the pipe receptacle; , A union nut for fastening the pipe receiving port to the union screw side, a plurality of cuts in the circumferential surface and the axial direction from the end of the union nut to the periphery of the pipe receiving port and the pipe receiving port and wherein a plurality of projections in the axial direction so as to have a open voids through one end and extend at intervals, and to insert the shaft of the driver or the like through the cut adjacent to the gap Detachable joint for underfloor drain pipe.   2. A desorption joint for an underfloor drain pipe according to claim 1, wherein a groove portion for engaging a hook wrench claw is formed on an outer peripheral portion of the union nut.

Images