JP3466571B2 - Connection structure between underground buried frame and pipe - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to sewer sewage,
Connection structure between underground skeletons such as manholes and cells used for connecting the inflow side and outflow side of drainage system for rainwater etc. and pipes for inflow and outflow of sewage, rainwater, etc., especially underground skeletons and pipes The present invention relates to a connection structure between an underground buried structure and a pipe, which can easily perform the connection work of the pipe because the tolerance of the connection angle with the body can be made large and can follow the ground movement after construction.

[0002]

2. Description of the Related Art Conventionally, as one means for connecting pipes such as sewage and rainwater, for example, JSWAS K-11.
The color specified in (Attachment of resin concrete pipe for sewer) is used.

As shown in FIG. 5, this pipe connecting collar 11 is used.
4 is a cylindrical color main body 115 and a color main body 11
5, a pair of rubber rings 117 fixed to the inner peripheral surface of the end portion of the collar 5 by a rubber ring retainer 116, and an insertion positioning annular stopper 118 projecting from the central portion of the inner peripheral surface of the collar body 115 in the axial direction. The pipe bodies 113 to be described later are connected to each other.

The underground buried skeleton means a vertical structure which allows people and various equipment to enter and exit from the ground for inspection of the inflow and outflow pipes of sewage, rainwater and the like.

A conventional connecting structure in which a pipe is connected to an underground buried structure using this collar will be described with reference to the drawings.

FIG. 6 is a perspective view showing a conventional connecting structure in the case where a pipe is connected to an underground buried structure using a collar, FIG.
[Fig. 6] is a cross-sectional view showing a conventional connection structure in the case where a pipe is connected to an underground buried structure using a collar.

In FIG. 6 and FIG. 7, 111 is a manhole as an underground structure, 112 is a manhole 1.
11 is a short pipe for pipe connection formed on the lower side surface of 11.
A pipe body connected to the short pipe 112 and having the same outer diameter and the same inner diameter as the short pipe 112, and 114 denotes the short pipe 112 and the pipe body 11.
The color is similar to that shown in FIG. 5 with an inner diameter slightly larger than the outer diameter of No. 3. That is, the collar 114 includes a cylindrical collar main body 115 and a pair of rubber rings 117 fixed to the inner peripheral surface of the end of the collar main body 115 by the rubber ring retainer 116.
And a ring-shaped stopper 118 for insertion positioning that is provided at the center of the inner peripheral surface of the collar body 115 in the axial direction, and connects the short pipe 112 and the pipe body 113.

The inner diameter of the rubber ring 117 is such that the short pipe 11 is secured in order to ensure watertightness of the connecting portion between the short pipe 112 and the pipe body 113.
2 and the outer diameter of the tube body 113 are slightly smaller than the outer diameter of the tube body 113, and the short tube 112 and the tube body 113 are butted and connected to each other via a stopper 118. At the corners of the stopper 118 and the collar body 115, the thickness of the collar body 115 is partially increased so that the guide 1 at the time of pipe connection is formed.
19 is formed.

According to the connecting structure in which the pipe body is connected to the underground burying body using the conventional collar, which is constructed as described above, the pipe body 113 is connected to the short pipe 112 of the manhole 111 as follows. Are connected.

The manhole 111 is provided in one end of the collar 114.
The short tube 112 is inserted and the collar 114 is attached to the short tube 112. Then, the end of the tubular body 113 is inserted into the other end of the collar 114. As a result, the short pipe 112 of the manhole 111 and the pipe body 113 are butted against each other via the stopper 118, and the short pipe 112 and the pipe body 113 are concentrically connected. The watertightness of the connection between the short pipe 112 and the pipe body 113 is ensured by the rubber ring 117.

[0011]

However, the above-mentioned connection structure has the following problems.

The short tube 112 of the manhole 111 is attached to the tubular body 11.
The tolerance of the connection angle in the case where 3 is inclined and connected is small. That is, as shown in FIG. 7, the short tube 112 and the tubular body 1
The distance (t1) between 13 and the collar 114 is very small. Actually, since the end portion of the tube body 113 is in contact with the guide 119 protruding from the inner peripheral surface of the collar 114,
There is almost no interval (t1).

The guide 119 is for easily connecting the pipes to each other in a straight line in the sewer line under natural flow, and the allowable bending angle is JSWAS K-11.
According to (Appendix of resin concrete pipe for sewer),
It is reported to be 2.5 °. For this reason, although there is no problem in normal times, if the allowable bending angle range is exceeded due to ground movement during an earthquake, etc., the pipe body 113 and the short pipe 112
The connection part with may be damaged.

Accordingly, an object of the present invention is to provide a manhole used for connecting the inflow side and the outflow side of a drainage system such as sewage sewage, rainwater, and the like, and an underground buried skeleton such as cells, and inflow and outflow of sewage, rainwater, etc. Since the tolerance of the connection angle with the pipe body can be taken large, the connection work of the pipe body can be done easily and the connection structure between the underground buried structure and the pipe body that can follow the ground fluctuation after construction To provide.

[0015]

The invention according to claim 1 is
An inflow pipe connecting portion, which is provided on the inflow side of the underground burying body and whose front surface is curved in an arc shape in the horizontal direction, a horizontally elongated hole formed in the inflow pipe connecting portion so as to communicate with the underground burying body, and the inflow It is composed of an inflow side short pipe attached to the front surface of the pipe connecting portion so as to be slidable in the horizontal direction, and an inflow pipe connected to the inflow side short pipe, and the inflow side short pipe matches the laterally elongated hole. Can be fixed to the inflow pipe connection portion at,
In the connection structure between the underground structure and the pipe,
Outflow side short pipe provided on the outflow side of the structure, and the outflow side
Outflow pipe that is connected by butting against a short pipe, and the outflow side
Consisting of a collar connecting the short pipe and the outflow pipe,
Make sure that the collar touches the collar body and the outer peripheral surface of the outflow side short pipe.
Contact the rubber ring for the short pipe on the outflow side and the outer peripheral surface of the outflow pipe.
The rubber ring for the outflow pipe that is in contact with the outflow side short pipe
Is formed thicker than the wall thickness of the outflow pipe,
The distance between the outer peripheral surface and the inner peripheral surface of the collar is equal to that of the outflow pipe.
Wider than the space between the outer surface and the inner surface of the collar
At the central portion in the axial direction of the inner peripheral surface of the collar body, a ring
-Shaped stopper is provided so as to project, and the outflow side short pipe and the outflow pipe
Is characterized by being abutted against each other via the stopper .

The invention according to claim 2 is the invention according to claim 1.
In Ming, the rubber ring for the outflow pipe depends on the outer diameter of the outflow pipe.
It is characterized in that it is replaceably attached to the collar body .

The invention according to claim 3 is the invention according to claim 1 or 2.
In the described invention, at least the outflow pipe side of the stopper
The corners are characterized by being formed at right angles .

[0018]

[0019]

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION One embodiment of a connection structure between an underground buried structure and a pipe according to the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing a connecting structure between an underground burying body and a pipe body according to the present invention, and FIG. 2 is a sectional view showing a mounting portion between an inflow side short pipe and an underground burying body body according to the present invention, FIG. 3 is an exploded perspective view showing a mounting portion of the inflow side short pipe and the underground buried structure in the present invention, and FIG. 4 is a sectional view showing a mounting portion of the outflow side short pipe and the underground buried structure in the present invention. .

In FIGS. 1 to 4, 1 is a manhole as an underground structure, and 2 is a front surface (S) provided on the inflow side of the lower side surface of the manhole 1, and the front surface (S) is curved in an outward horizontal arc shape. The inflow pipe connecting portion 3 is a horizontally elongated hole formed in the inflow pipe connecting portion 2 and communicating with the manhole 1. The dimension (H) on the short side of the horizontally long hole 3 is equal to the inner diameter of the inflow side short tube described later. Reference numeral 4 denotes an inflow side short pipe which is slidably attached to the front surface (S) of the inflow pipe connecting portion 2 in a horizontal direction.
Is an inflow pipe connected to the inflow side short pipe 4. The inflow side short pipe 4 can be fixed to the inflow pipe connecting portion 2 at an arbitrary position within a range matching the laterally long hole 3.

The manner of attaching the inflow side short pipe 4 to the inflow pipe connecting portion 2 will be described below with reference to FIGS. 2 and 3.

As shown in FIGS. 2 and 3, on the front surface (S) of the inflow pipe connecting portion 2, horizontally grooved rails 6 are vertically spaced from each other, and the inflow side short pipe 4 is The flange 4A is fixed to the rail 6 via a square nut 7, a screw rod 8 and a hexagon nut 9 which are inserted into the rail 6. Watertightness between the flange 4A of the inflow side short pipe 4 and the front surface (S) of the inflow pipe connecting portion 2 is ensured by the rubber ring 10 provided on the flange 4A, and the inflow side short pipe 4 and the inflow to be inserted therein. Watertightness with the pipe 5 is ensured by the rubber ring 12 fixed to the end of the inflow side short pipe 4 by the rubber ring retainer 11.

To change the mounting position of the inflow side short pipe 4, loosen the hexagon nut 9 and attach the inflow side short pipe 4 to the square nut 7.
At the same time, the hexagon nut 9 may be tightened in order to move it along the rail 6 and fix it to the inflow pipe connecting portion 2 at a predetermined position where the inflow side short pipe 4 and the inflow pipe 5 coincide with each other.

The adjusting range of the attachment angle of the inflow side short pipe 4 is the length of the difference between the long side dimension (L) of the laterally elongated hole 3 and the diameter size of the inflow side short pipe 4, and within this range. It is possible to freely select the horizontal mounting angle of the inflow pipe 5 with respect to the manhole 1.

Reference numeral 13 is an outflow pipe side short pipe provided on the outflow side of the lower side surface of the manhole 1, and 14 is an outflow pipe side short pipe 13.
Outlet pipe side short pipe 1 connected via a collar described later in
It is an outflow pipe having the same inner diameter as 3. The wall thickness of the outflow pipe side short pipe 13 is formed to be thicker than the wall thickness of the outflow pipe 14. Therefore, as shown in FIG. 4, the distance (t2) between the outer peripheral surface of the outflow pipe 14 and the inner peripheral surface of the collar is the distance (t3) between the outer peripheral surface of the outflow pipe side short pipe 13 and the inner peripheral surface of the collar. ) Wider formed.

Reference numeral 15 denotes the outflow pipe side short pipe 13 and the outflow pipe 1.
The collar has an inner diameter larger than the outer diameter of 4, and connects the outflow pipe side short pipe 13 and the outflow pipe 14. The collar 15 includes a cylindrical collar body 16, a short tube side rubber ring 17 that contacts the outer peripheral surface of the outflow tube side short tube 13, and an outflow tube side rubber ring 18 that contacts the outer peripheral surface of the outflow tube 14. ing. Both rubber rings 1
7 and 18 are fixed to the inner peripheral surface of the end of the collar body 16 by a rubber ring retainer 19. The inner diameter of the short pipe side rubber ring 17 is formed slightly smaller than the outer diameter of the outflow pipe side short pipe 13, and the inner diameter of the outflow pipe side rubber ring 18 is formed slightly smaller than the outer diameter of the outflow pipe 14. As a result, the watertightness of the connecting portion between the short pipe side rubber ring 17 and the outflow pipe side short pipe 13 is secured.

As for the collar 15, the existing collar, that is, the collar defined by the above-mentioned JSWAS K-11 is used as it is, only by changing the rubber ring 18 on the outlet pipe side according to the outer diameter of the outlet pipe 14. can do.

A ring-shaped stopper 20 for insertion positioning is projectingly provided at the center of the inner peripheral surface of the collar body 16 in the axial direction.
The outflow pipe side short pipe 13 and the outflow pipe 14 are annular stoppers 2
They are connected to each other through 0. Stopper 20
The corner between the collar body 16 and the collar body 16 is formed at a right angle to increase the tolerance of the connection angle of the outflow pipe 14.

To connect the outflow pipe 14 to the manhole 1, the outflow pipe side short pipe 13 of the manhole 1 is inserted into one end of the collar 15, and the collar 15 is attached to the outflow pipe side short pipe 13. Then, the end of the outflow pipe 14 is inserted into the other end of the collar 15. As a result, the outflow pipe side short pipe 13 and the outflow pipe 14 are abutted against each other via the stopper 20, and the outflow pipe side short pipe 13 and the outflow pipe 14 are concentrically connected.
The watertightness of the connection between the outflow pipe side short pipe 13 and the outflow pipe 14 is
Secured by the rubber rings 17 and 18.

When the outflow pipe 14 is connected to the outflow pipe side short pipe 13 while being inclined, as shown in FIG. 4, the distance (t2) between the outer peripheral surface of the outflow pipe 14 and the inner peripheral surface of the collar 15 is set. ) Is formed widely, the connection angle (θ) of the outflow pipe 14 is
Can be large. In this case, even if the outflow pipe 14 is inclined, the outflow pipe-side rubber ring 18 is deformed following the inclination, so that sufficient water tightness is ensured. In addition, the outflow pipe 14
The tolerance of the connection angle (θ) is further widened by forming the corners of the stopper 20 and the collar body 16 at right angles.

In the above description, the inflow pipe side is slidable horizontally along the rail, and the outflow pipe side is connected via the collar. The outflow pipe side is slid horizontally along the rail. Alternatively, the inlet pipe side may be connected via a collar.

[0034]

As described above, according to the present invention, it is possible to increase the tolerance of the connection angle between the underground buried structure and the inflow pipe and the outflow pipe, so that the pipe connection work can be easily performed. In addition, it has a useful effect of being able to follow ground changes after construction.

[Brief description of drawings]

FIG. 1 is a perspective view showing a connection structure between an underground buried structure and a pipe according to the present invention.

FIG. 2 is a cross-sectional view showing a mounting portion of an inflow side short pipe and an underground buried structure in the present invention.

FIG. 3 is an exploded perspective view showing a mounting portion of an inflow side short pipe and an underground burying body in the present invention.

FIG. 4 is a cross-sectional view showing a portion where the short pipe on the outflow side and the underground structure are attached in the present invention.

FIG. 5 is a cross-sectional view showing a conventional collar.

FIG. 6 is a perspective view showing a conventional connection structure in the case where a pipe is connected to an underground structure by using a collar.

FIG. 7 is a cross-sectional view showing a conventional connection structure in the case where a pipe is connected to an underground structure by using a collar.

[Explanation of symbols]

1: Manhole 2: Inflow pipe connection 3: Horizontal hole 4: Inflow side short pipe 4A: Flange 5: Inflow pipe 6: Rail 7: Square nut 8: Threaded rod 9: Hexagon nut 10: Rubber ring 11: Rubber ring retainer 12: Rubber ring 13: Outflow side short pipe 14: Outflow pipe 15: Color 16: Color body 17: Rubber ring on the short pipe side 18: Rubber ring on outflow pipe side 19: Rubber ring retainer 20: Stopper 111: Manhole 112: Short tube 113: tubular body 114: Color 115: Color body 116: Rubber ring retainer 117: Rubber ring 118: Stopper 119: Guide

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takashi Shimizu Inventor Takashi Shimizu 1-8-1 Kanda, Chiyoda-ku, Tokyo Inside Nippon Cast Iron Pipe Co., Ltd. (56) References JP-A-9-4038 (JP, A) SHO 61-68189 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) E03F 5/02 F16L 27/02 E02D 29/12

Claims (3)

(57) [Claims] 1. An inflow pipe connecting portion, which is provided on the inflow side of the underground burying body and has a front surface curved in an arc shape in the horizontal direction, and a laterally long shape formed in the inflow pipe connecting portion so as to communicate with the underground burying body. An inflow side short pipe horizontally slidably attached to the front surface of the inflow pipe connecting portion, and an inflow pipe connected to the inflow side short pipe. Can be fixed to the inflow pipe connection portion at any position that matches the hole, in the connection structure between the underground buried structure and the pipe body, an outflow side short pipe provided on the outflow side of the underground buried structure ,
An outflow pipe that is connected to the outflow side short pipe by being abutted to each other;
From the collar connecting the outflow side short pipe and the outflow pipe
The collar is composed of the collar body and the outflow side short pipe.
The rubber ring for the outflow side short pipe that contacts the outer peripheral surface, and the outflow pipe
A rubber ring for an outflow pipe that abuts an outer peripheral surface,
The wall thickness of the short pipe is thicker than the wall thickness of the outflow pipe.
The distance between the outer peripheral surface of the outflow pipe and the inner peripheral surface of the collar is
Wider than the space between the outer peripheral surface of the outflow pipe and the inner peripheral surface of the collar.
The central portion of the inner peripheral surface of the collar body in the axial direction
An annular stopper is projectingly provided on the front side of the outlet side short pipe and the front side.
The connection structure between the underground structure and the pipe body is characterized in that the outflow pipe is abutted through the stopper . 2. The rubber ring for the outflow pipe is provided outside the outflow pipe.
It is attached to the color body so that it can be replaced according to the diameter.
The structure for connecting an underground buried structure and a pipe body according to claim 1, wherein 3. The at least the outflow pipe of the stopper
The side corners are formed at right angles,
The connection structure between an underground buried skeleton and a pipe according to claim 1 or 2 .