JPH083813Y2 - Underwater box box waterproof joint - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a water-stop pipe for connecting pipes used when connecting pipes to an inflow hole or an outflow hole of a concrete box body for underground embedding such as a sewage mass or a manhole. Regarding fittings.

[0002]

2. Description of the Related Art Conventionally, when a drain pipe 13 is attached to an inflow hole 9 and an outflow hole 10 in a box body for underground burial, for example, a wastewater mass as shown in FIG.
After inserting one end side into the inflow hole 9 and the outflow hole 10 while providing a drainage gradient to the inside, seal the gap between the inflow hole 9 and the outflow hole 10 and the outer circumference of the drain pipe 13 with mortar or the like. In addition, invasion of underground water into the pipe and leakage of extraneous water such as sewage and miscellaneous drainage to the outside of the pipe were prevented. Further, there is also one in which a joint 14 as shown in FIG. 7 is attached to the inflow hole 9 or the outflow hole 10 in order to obtain a water blocking effect with the drain pipe.

[0003]

However, it is very difficult to completely seal the gap between them by filling the gap with mortar or the like and by the synergistic effect of the incompatibility between the pipe body and the mortar. there were. Especially during long-term use, groundwater and miscellaneous water intrude from the connection between the two due to the imperfection of the seal, which causes an unnecessary amount of wastewater to flow to the drain pipe side, increasing the amount of sewage treatment. That is a very serious problem.

Further, when the drainage pipe is inserted into the inflow hole and the outflow hole, since the wastewater mass is made of concrete and the drainage pipe is long, the mass body and the pipe body are separated due to the uneven settlement of the ground. Displacement will occur, and the drainage pipe will be inserted eccentrically, destroying the periphery of the inflow and outflow holes.
This further weakened the water blocking effect between the two. In addition, the joint system shown in FIG. 7 has poor adhesion between the joint 14 made of an elastic material and concrete, and
Since the joint 14 is made of an elastic material, the joint 14 is formed at the interface 15 with the concrete when the mold and the concrete are demolded at the time of molding, during transportation, or when the drain pipe is inserted.
However, it has the drawback of being inferior in water-stopping property due to peeling and displacement, resulting in a gap in the place, and concrete breaking.

In any case, the conventional connecting structure cannot obtain a good water blocking effect.

Therefore, the present invention has devised a water shut-off joint exclusively for a box body for underground burial such as this kind of sewage mass. It is easy to insert and install the pipe body, and the pipe body and the outflow hole or inflow after the installation. This is a water-stop joint that has an extremely excellent water-stopping effect that can reliably prevent water leakage between holes.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a joint body, a ring body having an inward flange portion at one end periphery, the entire inner peripheral surface of the ring body, and at least the other end outer periphery. It is configured by a cylindrical elastic body formed by partially covering the surface.

[0008]

Since the present invention has the above-mentioned structure, when the water shut-off joint body is fitted and mounted in the mold during the molding of the sewage mass, the concrete is poured into the sewage mass as shown in FIG. It will be molded so as to be integrally adhered to the inflow hole side and the outflow hole side of.

That is, since the ring body is exposed at the inward flange portion formed at the peripheral edge of one end of the water shut off joint and a part of the outer peripheral surface side at the other end, both of them are adhered to each other by the adhesive force between the ring body and concrete. Is tightly fitted, and no cracks or gaps are generated.Therefore, external groundwater, etc. does not enter between the water shutoff joint and the wastewater mass, and internal wastewater, etc. does not leak and is securely stopped. The water effect is exhibited.

Furthermore, when the tip end of the pipe is inserted into and attached to the water stop joint and tightened from the outer periphery of the joint with a tightening bum bar, the pipe and the water stop joint are securely connected, and both During that time, it will be fastened with the water stopped.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a half cutaway view of a water shutoff joint 1 showing an embodiment, in which 2 is a cylindrical ring body having an inverted T-shaped half cross section, a ring body main body 2a made of an iron plate, and a collar made of stainless steel. 3, and the flange 3 includes an inward flange 3a and an outward flange 3b.

Reference numeral 4 has a notch 4a into which the tip side of the ring body 2a is fitted, and the inner leg 4b is formed in a substantially L shape so as to be in close contact with the entire inner peripheral surface of the ring body 2.
Moreover, a rubber-made cylindrical elastic body having a body 4e formed by forming a protruding anchor portion 4b on the outer peripheral edge of the lower end of the outer leg portion 4c, and extending further upward. It is baked.

Reference numeral 5 denotes a concave portion formed on the outer peripheral surface of the body portion 4e of the cylindrical elastic body 4, and 6 denotes four protrusions provided on the inner peripheral surface side of the concave portion 5. 7 is the inner leg portion 4b
3 shows three protrusions provided on the inner peripheral surface side.

When the water shutoff joint 1 shown in the above embodiment is used, for example, the water shutoff joint 1 is arranged on the inflow hole 9 side and the outflow hole 10 side of the form at the time of molding the sewage mass 8. By pouring concrete into the mold, the wastewater mass 8 as shown in FIG. 2 is molded.

The water shutoff joint 1 is securely and closely attached to the inflow hole 9 side and the outflow hole 10 side of the wastewater mass 8 thus formed.

Moreover, since concrete is poured to the position shown in FIG. 1 (shown by the broken line) when the wastewater mass 8 is formed,
Due to the adhesive force between the main body 2a made of an iron plate and the concrete that barely appears on the outer periphery of the ring body 2, the water shutoff joint 1 is attached to the concrete in a very good state.

Further, since the outward flange portion 3b of the ring body 2 and the anchor portion 4d of the outer leg portion 4c are embedded in the concrete, the mounting state of the water shutoff joint 1 is further ensured.

Next, when the pipe body 11 is inserted into the water shut-off joint 1 in the state of FIG. 2, the pipe body 11 is inserted against the plurality of ridges 6 and 7, and the tip end portion of the inner leg portion 4b. Since the step portion 4f is brought into contact with the step portion 4f, and the step portion 4f is provided on the inward flange portion 3a of the ring body 2, the step portion 4f is prevented from being deformed and the tip of the tube body 11 is securely attached. Will be locked in. Further, due to the presence of the collar portion 3a, the adhesiveness to concrete is perfect and no cracks or gaps are generated at the interface.

Next, after inserting the tubular body 11, a commercially available ring-shaped tightening band 12 is externally fitted to the concave portion 5 of the elastic body 4 and tightened, and the elastic body 4 is inserted through the elastic body 4 as shown in FIG. The pipe body 11 is securely tightened and fixedly connected to the water shutoff joint.

When the sewage mass 8 is constructed in this manner, the inflow hole 9 and the outflow hole 10 of the sewage mass 8 and the water shutoff joint 1 are formed.
Since the connecting portion between the outer peripheral surfaces of the pipes and the connecting portion between the water shutoff joint 1 and the outer peripheral surface of the pipe body 11 are completely connected and connected in a water-stopped state, groundwater, miscellaneous water, etc. 8 does not invade into the pipe body 11 and the sewage does not leak from the sewage mass 8. Therefore, the problem due to the increase or decrease of sewage as in the conventional case is eliminated.

In the above embodiment, the ring body 2 is integrally formed in an inverted T-shape. However, the ring body 2 may have a substantially L-shaped cross section with at least the inwardly projecting collar portion 3a. Good. However, the inward flange portion 3a may be integrally formed with the ring body 2a or welded separately.

As shown in FIG. 4, the outward flange 3b is
The ring body 2 may be attached separately.

Further, the ring body 2 has a main body 2a made of iron and a collar portion 3 made of stainless steel. However, the ring body 2 may be entirely made of stainless steel, and any material may be used as long as it is made of metal.

In the above embodiment, the tubular elastic body 4 is made of rubber, but any elastic material may be used. Further, as the shape of the elastic body, other than the above-mentioned embodiment,
The shape may be as shown in FIG. 5, and the shape of the anchor portion 4d on the outer periphery and the protrusion on the inner peripheral surface does not matter.

In the above embodiment, the case where the water shutoff joint is used for the wastewater mass is explained.
If it is a box body for underground burial such as a manhole, its name and shape are irrelevant.

[0026]

[Effect] As described above, the present invention is a water-stop joint exclusively for a box body for underground embedding, so that the joint work of pipes can be easily performed by attaching the joint to the inflow hole or the outflow hole of the wastewater mass or the like. In addition to this, leakage of water between the pipe and joint after connection and intrusion of groundwater from the outside can be reliably prevented, and the water-stopping effect becomes extremely remarkable.

As a result, when the conventional concrete product is connected to the pipe body, it is possible to prevent destruction or damage of the pipe body connection portion such as the waste water mass, which is a concrete product, and to prevent the groundwater from invading. It was also possible to reliably prevent an increase in the amount of sewage treatment that occurred.

Further, as described in the embodiment, by fixing the outward anchor portion on the outer peripheral surface of the tubular elastic body or forming the outward flange portion on the ring body, the water-proof joint and the concrete product are fixed. The effect of becoming more certain was obtained.

Further, by forming a small ridge on the inner peripheral surface of the tubular elastic body and tightening the tightening band, there is an effect that the sealing property between the pipe body and the joint can be improved.

[Brief description of drawings]

FIG. 1 is a half-cut sectional view of a water shutoff joint.

FIG. 2 is a vertical cross-sectional view of a sewage mass with a water shutoff joint attached.

FIG. 3 is a vertical cross-sectional view of a sewage mass in a state where a pipe is connected to a water shutoff joint.

FIG. 4 is a partial cross-sectional view showing another embodiment of the ring body.

FIG. 5 is a partially half-sectioned sectional view showing another embodiment of the tubular elastic body.

FIG. 6 is a half cross-sectional view of a sewage mass showing a conventional example.

FIG. 7 is a sectional view of an essential part of a joint showing a conventional example. DESCRIPTION OF SYMBOLS 1 ... Water stop joint 2 ... Ring body 2a ... Ring body main body 3a ... Inward flange 4 ... Cylindrical elastic body 4a ... Notch 4b ... Inner leg 4c ... Outer leg part 4d ... Anchor part 8 ... Sewage mass 9 ... Inflow hole 10 ... Outflow hole 11 ... Tubular body 12 ... Tightening band

Claims (4)

[Scope of utility model registration request] 1. A water shutoff joint for connecting a pipe body connected to at least one of an inflow hole and an outflow hole of a box body for underground burial such as a sewage mass, wherein a joint body is inwardly directed toward a peripheral edge of one end. It comprises a ring body (2) having a collar portion (3a) and a cylindrical elastic body (4) which covers the entire inner peripheral surface of the ring body (2) and at least a part of the outer peripheral surface of the other end. A water stop joint for a box body for underground burying. 2. One end of the ring body (2) has a substantially inverted T half-section.
The waterproof joint for a box body for underground burying according to claim 1, which is a letter-shaped utility model registration claim. 3. A utility model in which a plurality of small ridges (6) and (7) are formed on the inner surface side of a tubular elastic body (4) and a tightening band (12) is mounted on the outer surface side. A waterproof joint for a box body for underground burying according to claim 1. 4. The box body for underground embedding according to claim 1 or 3, wherein an outward anchoring portion (4d) is provided so as to project from the outer peripheral surface of the tubular elastic body (4). Water stop fitting.