JP4558605B2 - Inner / sub pipe fittings - Google Patents

Description

  The present invention relates to a pipe joint for an inner / sub pipe that can secure an internal space of a manhole as wide as possible and can smoothly perform operations such as cleaning in the manhole.

FIG. 4 shows a typical example of a conventional inner / sub pipe fitting used for a manhole.
The inner / sub pipe joint 21 is fixed to the side wall of the manhole 50 and has a receiving port 22 for the inflow pipe 30 at one end of a laterally extending tube body 23 located outside the manhole 50. It has a cleaning port 24 at the other end located,
A lid 20 is attached to the cleaning port 24, and a vertical tube body 25 is integrally connected between the receiving port 22 and the cleaning port 24, and an inner side of the manhole 50 is connected to the lower end portion of the tube body 25. The inspection port 27 is formed in the upper end part of the vertical pipe body 25 (see Patent Document 1).

JP 2001-173869 A

  When the conventional pipe joint for an inner / sub pipe is installed in the manhole 50, as seen in FIG. 4 and Patent Document 1, the end portion on the side of the cleaning port 24 of the horizontal pipe body 23 protrudes greatly inside the manhole 50. As a result, it has hindered work such as entering and exiting the manhole and cleaning in the manhole.

In particular, the hard small manholes contains the human, when the work such as cleaning of the conduits to be connected to the inner sub Pipe fittings, since the impact put out are part of the inner sub Pipe fitting is large, impede various work In addition, if the attachment structure of the lid 20 of the cleaning port 24 is a screw-in type, a required length is required for the screw portion to receive the stress applied to the lid, and the lid is A working space for fitting with the screw portion is required on the cleaning port side. In addition, in the case of an open / close type with a hinge as in Patent Document 1, when the lid is attached or detached, the diameter of the lid is reduced by a manhole. Since it protrudes inward, there was a problem that these reduced the internal space of the manhole and hindered various operations such as cleaning.

  Therefore, the object of the present invention is to minimize the protrusion to the inside of the manhole, to secure a working space inside the manhole, and to easily attach and detach the lid of the cleaning port. It is an object of the present invention to provide a pipe joint for an inner sub pipe that can be easily and firmly locked.

In order to solve the above-mentioned problems, the pipe joint for an inner sub pipe of the present invention has a receiving port for an inflow pipe at one end portion of a tubular body extending in the lateral direction and a cleaning port at the other end, and the receiving port and the cleaning port In the meantime, a connection port for the inner sub-pipe is formed at the end of the tube body extending downward, and a lid body inserted and fitted into the cleaning port at a position opposite to the peripheral edge of the enlarged opening of the cleaning port, the surface of the lid, straddling the lid, tip, characterized in that a through-hole to lock with the stopper plate rod formed by bending.

According to the pipe joint for an inner sub pipe of the present invention, the cleaning port provided in the horizontal pipe body of the pipe joint for the inner sub pipe, which is penetrated and fixed to the manhole side wall, is formed on the inner side of the man hole. not protrude significantly, further, since the space for attaching and detaching the lid fitted into the cleaning opening can Rukoto minimized, facilitating operations such as cleaning of the inner sub-tube for pipe fittings and manhole Thus, work efficiency can be improved.

  In view of the above problems, the present inventor paid attention to a mounting structure of a lid body that fits into a cleaning port of a conventional inner / sub pipe joint, and made the structure as small as possible and attached / detached the lid body. At that time, the present invention was completed by pursuing a structure in which the lid does not protrude as far as possible inside the manhole.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic partially cutaway sectional view showing an example of a pipe joint for an inner sub pipe of the present invention, and FIG. 2 is a schematic perspective view showing another example of the pipe joint for an inner sub pipe of the present invention. is there.
FIG. 3 is a schematic side view showing an example of a lid body related to the pipe joint for an inner sub pipe of the present invention. FIG. 4 shows a conventional typical pipe joint for an inner sub pipe installed on the inner wall of a manhole. It is the partial schematic diagram shown by the state.

The pipe joint for the inner sub pipe of the present invention is a pipe joint for connecting the sewage flowing from the lateral direction to the upper part of the manhole 50 to the inner sub pipe 40 leading to the lower part of the manhole 50 as shown by 21 in FIG. is there.
As shown in FIG. 1, a pipe joint 1 for an inner sub pipe of the present invention is fixed to the side wall of a manhole and has a receiving port 2 for an inflow pipe at one end of a pipe body 3 extending in the lateral direction. A connecting port 6 for an inner / sub-sub pipe is formed at the end of a tubular body 5 having a cleaning port 4 at an end and extending downward between the receiving port 2 and the cleaning port 4. An inspection port 17 is formed at the end of the.

This inner sub pipe joint 1 is provided with through holes 8, 8 at the cleaning port 4 at positions opposite to the enlarged diameter peripheral edge 7 of the pipe body 3. The rod 9 can be inserted from the outside of the tube body 3.
As shown in FIG. 2, the inner joint pipe fitting 1 of the present invention, after inserting and fitting the lid body 10 into the cleaning port 4, inserts the stopper rod 9 into the through holes 8 and 8 from above, The lid body 10 is structured to be locked and locked by a stop bar 9 on the surface thereof.
That is, even if the lid body 10 inserted and fitted into the cleaning port 4 is pushed toward the cleaning port 4 by the pressure (water pressure) of sewage flowing into the tube body 3 from the receiving port 2 for the inflow pipe, The surface of the lid body 10 comes into contact with the stopper rod 9 inserted into the 8 and is locked, and the lid body 10 does not jump out to the inside of the manhole.

Transmural hole 8 provided et the a position opposing the enlarged rim of the opening 7 of the cleaning port 4 may be a pair, or may be provided a plurality of pairs at an interval.
In the case where a pair of through holes 8 is provided, it is usually preferable that the line connecting the through holes 8 and 8 is provided in the enlarged-diameter opening peripheral portion 7 so as to pass through the center of the cleaning port 4. It may be V-shaped, and it is also preferable to form it symmetrically across a straight line passing through the center of the cleaning port 4. Further, depending on the case, it is possible to adopt a mode in which the through holes intersect each other.

The stopper rod 9 is preferably made of stainless steel, but any material such as metal or synthetic resin may be adopted as long as it is a rod made of a material having excellent rigidity and corrosion resistance.
Further, the stopper rod 9 preferably has a structure in which one end is bent in order to prevent the stopper rod 9 from falling out of the through hole 8 after being inserted into the through holes 8.
The tip bent portion may be formed in any shape such as a straight line, a circle, or a curve as long as the stopper rod 9 inserted into the through hole 8 does not easily fall off.
The diameter of the through hole 8 may be formed to a thickness that allows the stopper bar 9 to be inserted easily and does not easily fall out of the through hole 8 after being inserted, so that the stopper bar 9 is inserted into the through hole 8. It is preferable to form it slightly wider than the same diameter as the stop rod.
When the stopper rod 9 is provided with a SUS chain or wire connected to the tube body 3 or the lid body 10, the stopper rod 9 can be prevented from falling.

The lid body 10 is a cylindrical body, and as shown in FIG. 3, a ring-shaped water-stopping packing 13 is attached to a groove 12 formed in the circumferential direction of the trunk portion 11, and the lid body 10 is cleaned with a cleaning port. When inserted and fitted into the tube 4, the water stop packing 13 presses the inner peripheral surface of the tube body 3 inside the cleaning port to maintain the watertightness inside the tube body 3.
In addition, a handle 14 is provided on the outer surface of the lid body 10 so that the lid body 10 can be easily attached and detached. The handle may have a shape of a business trip as shown in FIG. 3 or a shape withdrawn inward.

  According to the pipe joint for an inner sub pipe of the present invention, the distal end portion of the body portion 11 of the lid body 10 is applied to the cleaning port 4 and is inserted and fitted into the tube body 3 from the cleaning port 4 as it is. The lid 10 can be easily and firmly locked to the cleaning port 4 by inserting the stopper rod 9 into the through holes 8 and 8 provided to face the peripheral edge 7 of the enlarged opening of the body 3. .

  The pipe joint for an inner sub pipe of the present invention is made of a synthetic resin, and in order to make mortar joining between the side wall of the manhole and the outer peripheral surface of the pipe joint for the inner sub pipe of the present invention more secure when penetrating and fixing to the side wall of the man hole. As shown in FIG. 1, a sanded surface 15 may be formed on the outer peripheral surface to which the horizontal tubular body is adapted. In addition, in the case of a straight pipe having no inlet 2 for the inflow pipe, an annular packing (between the inner peripheral surface of the mounting hole opened in the side wall surface of the manhole and the outer peripheral surface of the tubular body is provided in order to enhance earthquake resistance. (Not shown) may be arranged.

  As the synthetic resin that can be used for the pipe joint for the inner sub pipe according to the present invention, hard polyvinyl chloride, polyethylene, polypropylene, ABS, PET, etc., and those obtained by recycling these molded products can be used. Alternatively, a rubber-based material such as NBR, SBR, EPDM, CR, silicone rubber, and a synthetic resin having elasticity such as soft vinyl chloride resin and EVA can be used for the annular packing.

Since the pipe joint for inner sub pipes of the present invention has the above-described configuration, the following operational effects can be obtained as compared with conventional pipe joints for inner sub pipes.
1. The lid body 10 according to the pipe joint for an inner sub pipe of the present invention can be formed in a short body portion because it only needs a structure in which the water stop packing 13 is provided in the body portion 11.
2. In order to lock the lid body 10, the through holes 8 and 8 through which the stopper rod 9 is inserted are provided in the peripheral edge portion 7 of the overhanging opening of the tube body 3.
3. The lock structure of the lid body 10 is a simple structure in which the stopper rod 9 is inserted into the through holes 8 and 8 after the lid body 10 is inserted and fitted into the cleaning port 4, and the number of parts is small, so that there are few failures. .
As described above, the pipe joint for the inner sub pipe according to the present invention can reduce the protruding portion into the manhole at the end portion on the cleaning port side compared to the conventional pipe joint for the inner sub pipe, so that the manhole required for various operations such as cleaning is performed. The internal space is secured and work efficiency is improved. Furthermore, there are few failures and stable performance can be demonstrated over a long period of time.

  The sealing and locking structure of the lid according to the pipe joint for an inner sub pipe of the present invention can be used for other various pipe joints.

It is a typical partial notch sectional view showing an example of a pipe joint for inner sub pipes of the present invention. It is a typical perspective view which shows the other example of the pipe joint for inner subpipes of this invention. It is a typical side view which shows an example of the cover body which concerns on the pipe joint for inner subpipes of this invention. It is the partial schematic diagram shown in the state which installed the conventional typical pipe joint for inner subpipes on the inner wall of a manhole.

Explanation of symbols

1, 21 Pipe joint for inner sub pipe 2, 22 Receiving port for inflow pipe 3, 23 Horizontal pipe body 4, 24 Cleaning port 5, 25 Pipe body extending downward (vertically) 6, 26 Connection port for inner sub pipe 7 Peripheral edge of widening opening of cleaning port 8 Through hole 9 Stop rod 10, 20 Lid body 11 Body 12 of lid body 13 Groove 13 Water stop packing 14 Handle 15 Sand surface 17, 27 Inspection port 30 Inflow pipe 40 Inner sub pipe 50 manhole

Claims (1)

A receiving port for the inflow pipe is provided at one end portion of the tubular body extending in the lateral direction, and a cleaning port is provided at the other end portion, and the connection for the inner sub pipe is provided between the receiving port and the cleaning port at the end portion of the tubular body extending downward. a sub pipe fitting inner mouth is formed, the opposed position of the enlarged diameter opening edge of the cleaning opening, the lid was fitted into the said cleaning opening, on the surface of the lid, the lid the straddle sub pipe fitting inner wherein the tip portion is provided with a through-hole to lock with the stopper plate rod formed by bending.

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