JP3065876B2 - Flange joint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flange joint which can easily and reliably connect a drain pipe to a side wall of a manhole or the like.

[0002]

2. Description of the Related Art As a flange joint of this kind, for example, Japanese Utility Model Publication No. 4-29190 proposes a cylindrical joint rubber applied to a joint portion between a concrete manhole and a concrete fume pipe.

When connecting a manhole and a fume tube using this joint rubber, a flange of the joint rubber is connected to a side wall of the manhole via an adhesive,
A fume tube is fitted and connected to the cylindrical portion of the joint rubber, and mortar is filled between the connection hole formed in the side wall of the manhole and the outer peripheral surface of the end of the fume tube for connection.

[0004]

However, in the case of pipe connection using this joint rubber, since the manhole and the fume pipe are firmly fixed with mortar, the thrust in the pipe axial direction is attached to the fume pipe after the pipe is constructed. When a load is applied, or a bending moment is applied due to earth pressure, wheel load, ground subsidence, or the like, there is a risk that the fume pipe may be damaged at the connection portion by a load directly acting on the fume pipe.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a drain pipe can be easily and securely connected to a side wall of a manhole or the like, and a drainage pipe which absorbs and relaxes a thrust load, a bending moment, etc. acting on the drain pipe is drained. An object of the present invention is to provide a flange joint that can prevent the breakage of a pipe.

The present invention is a flange joint made of an elastic member such as rubber used for connecting a drain pipe to a connection hole formed in a side wall of a manhole or the like. A flange is provided on the side through a bent portion having a semicircular cross section, and a cylindrical connecting portion having a smaller diameter is provided at the other end of the cylindrical portion, and the back surface of the flange is adhesively bonded to a side wall. While the other end of the sleeve short tube fitted in the cylindrical portion is inserted into the connection hole and fixed with a filler filled in the gap between the connection hole and the outer periphery of the other end of the sleeve short tube, Further, the end of the drain pipe inserted into the cylindrical connection part is inserted to the inside of the sleeve short pipe, and the drain pipe is fixed by a band wound around the cylindrical connection part on the outer periphery.

[0007]

With the above construction, the connection angle of the drainage pipe can be adjusted by the bent portion having a semicircular cross section at the time of piping construction. Further, since the drain pipe is inserted into the sleeve short pipe and supported so as to be movable in the pipe axis direction, external forces such as a thrust load and a bending moment acting on the drain pipe are absorbed and reduced.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view showing a construction state of a pipe using a flange joint of the present invention, in which 1 is a side wall such as a manhole, 2 is a drain pipe made of a synthetic resin such as a vinyl chloride resin,
3 is a flange joint. Reference numeral 4 denotes a sleeve short tube made of a synthetic resin such as a vinyl chloride resin.
Is slightly larger than the outer diameter of the drain pipe 2.

The flange joint 3 is made of an elastic material such as rubber or soft plastic, and has a semicircular cross section at one end outer peripheral side of a cylindrical portion 32 having an inner diameter substantially equal to the outer diameter of the short sleeve tube 4. The flange 33 is provided integrally via the bent portion 34. Also, the flange 33
An adhesive 35 such as butyl rubber is uniformly applied to the back surface of the, that is, the surface in contact with the side wall 1 such as a manhole, and the surface thereof is covered with release paper (not shown). This release paper is 1
It is cut in the radial direction at a plurality of places, and can be easily peeled off from the back surface of the flange 33 if necessary.

At the other end of the cylindrical portion 32, a small-diameter cylindrical connecting portion 31 having an inner diameter substantially equal to the outer diameter of the drain pipe 2 is provided. An adhesive 35 such as butyl rubber is uniformly applied to the inner peripheral surface of the cylindrical connecting portion 31 as described above, and the surface is covered with release paper (not shown).

When the drain pipe 2 is connected to the side wall 1 such as a manhole using the flange joint 3 and the sleeve short pipe 4,
A connection hole 11 slightly larger than the outer diameter of the short sleeve tube 4 is formed in a side wall 1 such as a manhole. Then, one end of the sleeve short pipe 4 is fitted into the cylindrical portion 32 of the flange joint 3, and the band 6 is wound around the outer periphery of the cylindrical portion 32 and fastened and fixed. Then, the other end of the sleeve short tube 4 is inserted into the connection hole 11 from outside the manhole or the like.

Next, the release paper covering the inner peripheral surface of the cylindrical connecting portion 31 of the flange joint 3 is peeled off, and the end of the drain pipe 2 is inserted into the cylindrical connecting portion 31 and the sleeve short tube 4 while being inserted. The positioning is performed while adjusting the connection angle of the drain pipe 2 at the bent portion 34 of the flange joint 3.

After the drain pipe 2 has been provisionally piped in this manner, the release paper covering the back surface of the flange 33 of the flange joint 3 is peeled off, and the back surface of the flange 33 is pressed against the side wall 1 such as a manhole so that the adhesive 35 To join the side wall 1. Also,
The band 7 is wound around the outer periphery of the cylindrical connection portion 31 of the flange joint 3 and fixed by tightening. Finally, the gap between the connection hole 11 and the outer peripheral surface of the sleeve short tube 4 is filled with the filler 8 such as mortar, butyl rubber, and the like, and the work is completed.

After the pipe is installed, the sleeve short pipe 4 is firmly fixed to the side wall 1 such as a manhole via the filling material 8, but the drain pipe 2 is inserted into the sleeve short pipe 4 and is movable in the pipe axis direction. Supported by Therefore, the thrust load acting on the drain pipe 2 is absorbed by the expansion and contraction of the cylindrical portion 31 of the flange joint 3 made of an elastic member. In addition, since the external force such as a bending moment acting on the drain pipe 2 is absorbed and moderated by the elastic deformation of the sleeve short pipe 4 protruding outward from the side wall 1 such as a manhole, the drain pipe 2 is not damaged. .

[0015]

As described above in detail, in the flange joint of the present invention, since the cylindrical portion and the flange are connected via the bent portion having a semicircular cross section, the angle of the drain pipe is adjusted on the side wall of the manhole or the like. It can be freely connected and piping work can be done very easily. In addition, since the end of the drain pipe is inserted to the inside of the sleeve short pipe and is fixed with a band wound around the outer circumference of the cylindrical connection part, the thrust load acting on the drain pipe after piping construction is Is absorbed by Furthermore, since the external force such as bending moment acting on the drainage pipe is absorbed and moderated by the elastic deformation of the sleeve short pipe projecting from the side wall of the manhole or the like, breakage of the drainage pipe at the connection portion is prevented. You.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a construction state of a pipe using a flange joint of the present invention.

[Description of Signs] 1 Side wall of manhole etc. 2 Drainage pipe 3 Flange joint 4 Sleeve short pipe 11 Connection hole 31 Cylindrical connection part 32 Cylindrical part 33 Flange 34 Bent part

Claims (1)

(57) [Claims] 1. A flange joint (3) made of an elastic member such as rubber used for connecting a drain pipe (2) to a connection hole (11) formed in a side wall (1) such as a manhole.
The flange joint (3) is on the outer peripheral side of one end of the cylindrical portion (32).
To the flange (3) via a bent portion (34) having a semicircular cross section.
3) is provided, and the other end of the cylindrical portion (32) is
A cylindrical connecting portion (31) having a smaller diameter than that is provided.
The back surface of the flange (33) is adhesively bonded to the side wall (1).
Sleeve short tube inserted into the cylindrical portion (32)
The other end of (4) is inserted into the connection hole (11) and
In the gap between (11) and the outer circumference of the other end of the short sleeve tube (4)
Fixed with filled filler (8) and connected to said cylinder
The end of the drain pipe (2) inserted into the part (31) is a sleeve
It is inserted all the way to the inside of the short pipe (4) and has a cylindrical connection.
Drain pipe (2) with band (7) wrapped around (31)
Is fixed .