JP2012067896A - Square water stop plug for box pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a square water stop plug for a box pipe, which completely prevents leakage of water at an internal corner part.SOLUTION: The square water stop plug includes a pressing plate 2, a receiving plate 4, a hollow ring 3, a cylindrical part 5 and a piece 6 for an internal corner. The pressing plate 2 and the receiving plate 4 are formed in a square or rectangular configuration basically. The hollow ring 3 is formed by molding a tubular material into a ring shape, is filled with gas inside, and is formed so that an outer contour shape is a chamfered square or rectangle by alternately arranging four linear parts 3a and four curved parts 3b. The hollow ring 3 is held by a peripheral edge part of the pressing plate 2 and a peripheral edge part of the receiving plate 4, and the hollow ring 3 is compressed from both side by narrowing the distance between them to expand the hollow ring 3 circumferentially outward.

Description

  The present invention relates to a water stop plug that is a device for blocking and closing a pipe line such as a sewer pipe, and can maintain high water tightness for a long time, and in particular, a sewer having a square or rectangular cross section. The present invention relates to a rectangular water stop plug that can be applied to a pipe (box pipe).

  When refurbishing and repairing the inside of a sewer manhole, from the viewpoint of hygiene, safety, etc., it is necessary to take measures against the sewage (sewage) that is flowing down. Various measures are taken accordingly. For example, a method of bypassing a construction site by a bypass construction method as disclosed in JP-A-2005-180569 is practiced.

  Specifically, the outlet of the sewage pipe upstream of the manhole (upstream) using a water stop plug composed of a hollow O-ring filled with gas and a circular base plate and a pressing plate sandwiching the O-ring. By installing a seal plug at the inlet (downstream port) of the downstream sewer pipe and connecting them with a bypass pipe, the sewage is bypassed from the upstream side to the downstream side of the manhole. Flow down through the tube. If it does in this way, sewage will flow down to the downstream continuously, without passing the construction location of a manhole.

JP 2005-180569 A JP 2001-279803 A JP-A-9-242165 Japanese Utility Model Sho 62-117392 Japanese Utility Model Publication No. 61-180283 Japanese Utility Model Publication No. 60-79084

  By the way, the water stop plug and the seal plug used in the bypass construction method of Japanese Patent Application Laid-Open No. 2005-180569 are both circular in basic shape, and are intended for sewer pipes having a circular cross section. It cannot be used for water pipes (box pipes) that are square or rectangular.

  Therefore, it is conceivable to change the basic shape of the pressure plate or the hollow O-ring in the water stop plug or the like to a square or a rectangle so that it can be applied to a box pipe. There is a problem that water leaks out and cannot be completely stopped.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a rectangular water stop plug for a box pipe that can completely prevent water leakage at a corner.

  A rectangular water stop plug for a box tube according to the present invention is constituted by a first clamping member (pressing plate), a second clamping member (receiving plate), a hollow ring, a cylindrical portion, and a corner piece. The first clamping member and the second clamping member are formed so that the basic shape is a square or a rectangle, and the hollow ring is formed by forming a tubular material into a ring shape. Is filled with gas, and by alternately arranging four linear portions and four curved portions, the outer contour shape is formed to be a chamfered square or rectangle, and the first clamping member The cylindrical portion is sandwiched between the peripheral edge portion and the peripheral edge portion of the second holding member, and the cylindrical portion is connected to the peripheral edge of the large hole formed in the first holding member or the second holding member. , Curved surface recessed inward, rectangular or It has a square horizontal plane and a vertical plane, and by narrowing the distance between the first clamping member and the second clamping member, the hollow ring is compressed from both sides, and the hollow ring is expanded outward in the entire circumference. It is characterized by being configured to be able to.

  The radius of curvature of the curved surface of the corner piece is preferably set to 100 to 110% of the outermost radius of curvature of the curved portion of the hollow ring, and is the middle in the longitudinal direction of the cylindrical portion. In the position, a water stop box is provided in which the internal space communicates with the base end side portion of the cylindrical portion and the internal space of the tip end portion, and a water stop plate is disposed in the water stop box. It is preferable that the inner space of the water stop box and the inner space of the base end side portion of the cylindrical portion can be blocked from each other by adhering to the inner wall surface on the upstream side.

  In addition, an opening for taking out or inserting a water stop plate disposed therein is formed above the water stop box, and a flange for fixing and sealing the lid is formed in the opening. Preferably, a plurality of bolt holes are formed on one side surface of the water stop box, and a large number of bolts are inserted from the outside to the inside of the water stop box through the bolt holes. It is preferable that the bolt is tightened so that the water stop plate disposed inside the water stop box can be pressed against and closely adhered to the inner wall surface on the upstream side of the water stop box.

  The square water stop plug for a box pipe according to the present invention can be installed in a sewer pipe by only an extremely simple operation, and preferably prevents water leakage from the corner of the box pipe and completely stops the inside of the pipe. And the effect can be sustained for a long time. In addition, when the water stop box is disposed in the cylindrical portion and the internal space of the cylindrical portion can be appropriately blocked by the water stop plate, when connecting the bypass pipe to the cylindrical portion, or other This is extremely convenient when it is necessary to temporarily stop the flow of sewage for a reason.

FIG. 1 is a perspective view of a rectangular water stop plug 1 for a box pipe according to the present invention (first embodiment). FIG. 2 is an exploded perspective view of the rectangular water stop plug 1 for the box tube of FIG. FIG. 3 is a plan view of the rectangular water stop plug 1 for the box tube of FIG. FIG. 4 is a side sectional view of the rectangular water stop plug 1 for box tube of FIG. FIG. 5 is a perspective view of the corner piece 6. FIG. 6 is an explanatory view of a method for installing the rectangular water stop plug 1 for the box pipe of FIG.

  Hereinafter, an embodiment of the “square water plug for box pipe” of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view of a rectangular water plug 1 for a box tube (first embodiment) according to the present invention, FIG. 2 is an exploded perspective view, FIG. 3 is a plan view, and FIG. 4 is a side sectional view. This rectangular water stop plug 1 basically includes a pressing plate 2 (first holding member), two hollow rings 3, a receiving plate 4 (second holding member), and a cylindrical shape shown in FIGS. It is comprised by the part 5 and the piece 6 for corners shown in FIG.

  Among these, as shown in FIG. 2, the pressing plate 2 is composed of a square (or rectangular) plate main body 2a, a reinforcing peripheral wall portion 2b, and a rib 2c. The plate main body 2a has a peripheral portion. Many small holes 2d are formed. A large hole 2e is formed in the center of the plate body 2a as shown in FIG. And the cylindrical part 5 is connected to the periphery of this large hole 2e.

  Each of the hollow rings 3 is formed by forming a soft, stretchable tube-shaped material (rubber, silicon, or other material) into a ring shape, and each of the hollow interiors is filled with gas (air or , Other gases). In addition, as shown in FIG. 2, the hollow ring 3 arrange | positions four linear parts 3a (all are the same dimension, the same shape) and four curved parts 3b (all are the same dimension, the same shape) alternately. Thus, the outer contour shape is formed to be a chamfered square (or rectangle).

  As shown in FIG. 2, the receiving plate 4 projects in a vertical direction from a square (or rectangular) plate body 4a dimensioned to the same size as the plate body 2a of the pressing plate 2 and one surface thereof. And a large number of bolts 9 (28 in this embodiment). A large hole 4 b is also formed in the center of the plate body 4 a of the receiving plate 4 in the same manner as the pressing plate 2.

  The cylindrical part 5 protrudes perpendicularly with a predetermined length to one side of the plate body 2a, and as shown in FIGS. 3 and 4, the intermediate position in the length direction (the base end side of the cylindrical part 5) Between the part 5a and the tip side part 5b), a water stop box 7 is arranged. As shown in FIG. 4, the internal space of the water stop box 7 communicates with the internal space of the proximal end side portion 5 a and the distal end side portion 5 b of the cylindrical portion 5 disposed on both sides thereof. . Moreover, as shown in FIG.3 and FIG.4, the square water stop board 8 is arrange | positioned inside the water stop box 7, Furthermore, one side surface (the tip side part of the cylindrical part 5) of the water stop box 7 is arrange | positioned. On the side surface on the 5b side, a large number (16 in this embodiment) of bolts 10 are inserted from the outside to the inside of the water stop box 7 through the bolt holes.

  The water stop plate 8 is set to have a height dimension and a width dimension larger than the inner diameter dimension R (see FIG. 4) of the base end side portion 5 a of the cylindrical portion 5. The inner wall surface on the upstream side of the box 7 (the inner wall surface on the base end side portion 5a side of the cylindrical portion 5) is pressed against and closely contacts the inner space of the water stop box 7 and the base end side portion 5a of the cylindrical portion 5 It is possible to block between the interior space.

  An opening 7 a is formed above the water stop box 7, and the water stop plate 8 disposed inside can be taken out from the opening 7 a. Further, the opening 7a is formed with a flange 7b, and a cover (not shown) is covered, and the cover is fixed to the flange 7b by any means (bolts and nuts, clamps, etc.). The part 7a can be sealed.

  The corner piece 6 includes a curved surface 6a that is recessed inward, a rectangular (or square) horizontal surface 6b and a vertical surface 6c, and two deformed side surfaces 6d and 6e. Among these, the horizontal surface 6b and the vertical surface 6c intersect at right angles, and the two deformed side surfaces 6d and 6e are parallel to each other. The radius of curvature of the curved surface 6a coincides with the outermost radius of curvature of the curved portion 3b of the hollow ring 3, or is slightly larger (100 to 110%).

  As shown in FIG. 2, the rectangular water stop plug 1 passes the bolt 9 of the receiving plate 4 through the inside of the hollow ring 3 into the small hole 2d of the pressing plate 2, and as shown in FIG. The hollow ring 3 is assembled so as to be sandwiched between the peripheral edge of the pressing plate 2 and the peripheral edge of the receiving plate 4, and the bolt 9 is protruded from the small hole 2 d of the pressing plate 2 toward the cylindrical portion 5. Nuts (not shown) are respectively attached, and the nuts are tightened or loosened to adjust the distance between the pressing plate 2 and the receiving plate 4 for use.

  Here, the usage method (installation method with respect to a box pipe | tube) of the square water stop plug 1 of this embodiment is demonstrated. First, prior to installation, an operator enters the manhole to be constructed, confirms the interior, and opens the upstream outlet (the outlet of the sewer pipe upstream of the construction site) and the downstream outlet (the inlet of the downstream sewer pipe). Wash with high pressure water. Next, the rectangular water stop plug 1 shown in FIG. 1 is carried into the manhole and installed at the upstream port.

  When the square water plug 1 is attached to the upstream port, the square water plug 1 is fitted into the upstream port so that the pressing plate 2 faces the manhole. At this time, as shown in FIG. 6, one piece for each corner 6 shown in FIG. 5 is arranged in each of the four corners 11 a of the box tube 11. Alternatively, the corner piece 6 is affixed in advance to the outer surface of the curved portion 3b (see FIG. 2) of the hollow ring 3 by using a double-sided tape or glue, and the rectangular water-stop plug 1 Is inserted into the upstream port of the box tube 11.

  Next, a nut (not shown) attached to the bolt 9 (see FIG. 1) of the receiving plate 4 is tightened to narrow the gap between the pressing plate 2 and the receiving plate 4 and are sandwiched between them. The hollow ring 3 is compressed from both sides. Then, the gas sealed inside the hollow ring 3 is compressed, and the outer peripheral portion of the hollow ring 3 is expanded outward by the action of the compressed gas, and the linear portion 3a is The tube 11 is in close contact with the ceiling surface, both side wall surfaces, and the bottom surface.

  In the four corners 11a, the curved portion 3b of the hollow ring 3 is in close contact with the curved surface 6a (see FIG. 5) of the corner piece 6, and the corner piece 6 faces the corner 11a. The horizontal surface 6b and the vertical surface 6c of the corner piece 6 are in close contact with the corner portion 11a.

  Note that the force with which the outer peripheral portion of the hollow ring 3 is pressed against the wall surface of the box tube 11 increases in accordance with the amount of compressive force (tightening amount of the nut) by the pressing plate 2 and the receiving plate 4. Therefore, the square water stop plug 1 can be firmly fixed in the box pipe 11 by firmly tightening the nut.

  When the rectangular water stop plug 1 is attached to the upstream port of the box tube 11 in this manner, the hollow ring 3 and the corner piece 6 are in close contact with the ceiling surface, both side walls, the bottom surface, and the corner portion 11a of the box tube 11. By doing so, the sewage flow from upstream can be blocked without causing water leakage.

  In addition, the water level of the sewage upstream of the square water stop plug 1 gradually rises by being blocked. When the water level exceeds the height of the lower edge of the large hole 4 b (see FIG. 2) formed in the receiving plate 4, the upstream sewage flows from the large hole 4 b of the receiving plate 4 to the inside of the hollow ring 3. And then flows into the proximal end portion 5a of the cylindrical portion 5 from the large hole 2e formed in the pressing plate 2 (see FIG. 4).

  At this time, as shown in FIG. 4, the water stop plate 8 is disposed in the water stop box 7 and the bolt 10 is tightened so that the water stop plate 8 is placed on the inner wall surface on the upstream side of the water stop box 7. When the water stop box 7 and the base end side portion 5a of the cylindrical portion 5 are blocked by the water stop plate 8, the upstream sewage flows downstream from the water stop box 7. It does not flow down, and therefore does not flow into the manhole to be constructed.

  On the other hand, at the downstream port, a plug (not shown) having the same configuration as that of the rectangular water stop plug 1 of FIG. 1 or the rectangular water plug 1 to the water stop box 7 and the cylindrical portion 5 of FIG. A plug (not shown) from which the distal end portion 5b of the plug is removed is attached in the same manner, and the cylindrical portion 5 of the upstream water-stop square water stop plug 1 and the cylindrical portion of the downstream plug are connected to the bypass pipe. (Not shown).

  Finally, the bolt 10 is loosened, the water stop plate 8 is removed from the water stop box 7, and the flange 7b of the water stop box 7 is covered and fixed, and the opening 7a is sealed. Then, the sewage in the upstream box pipe can be allowed to flow down to the downstream box pipe via the bypass pipe without flowing into the manhole to be constructed, and in the upstream and downstream box pipes. It is possible to suitably avoid the bad odor and toxic gas flowing into the manhole.

  In the present embodiment, two hollow rings 3 are mounted between the pressing plate 2 and the receiving plate 4, but one may be omitted and only one may be mounted. The corner piece 6 is preferably made of rubber, but other materials can be used as long as they have the necessary elasticity and rigidity. Further, in the present embodiment, the cylindrical portion 5 is connected to the periphery of the large hole 2e of the pressing plate 2 (see FIG. 4), but on the periphery of the large hole 4b of the receiving plate 4 (see FIG. 2). It is good also as a structure to connect.

1: Square water stop plug for box pipe,
2: Press plate,
2a: plate body,
2b: peripheral wall,
2c: rib,
2d: small hole,
2e: Large hole,
3: Hollow ring,
3a: linear part,
3b: curved portion,
4: backing plate,
4a: plate body,
4b: large hole,
5: Cylindrical part,
5a: proximal end side part,
5b: tip side portion,
6: Corner piece,
6a: curved surface,
6b: horizontal plane,
6c: vertical plane,
6d, 6e: irregularly shaped side surfaces,
7: Water stop box,
7a: opening,
7b: flange,
8: Water stop plate,
9: Bolt,
10: Bolt,
11: Box tube,
11a: corner

Claims (5)

The first clamping member, the second clamping member, a hollow ring, a cylindrical portion, and a corner piece,
The first clamping member and the second clamping member are formed so that a basic shape is a square or a rectangle,
The hollow ring is formed by forming a tube-shaped material into a ring shape. Gas is sealed in the hollow, and four linear portions and four curved portions are alternately arranged to form an outer side. The contour shape is formed to be a chamfered square or rectangle, and is sandwiched between the peripheral edge of the first clamping member and the peripheral edge of the second clamping member,
The cylindrical portion is connected to a peripheral edge of a large hole formed in the first clamping member or the second clamping member,
The corner piece has a curved surface recessed inward, a rectangular or square horizontal surface and a vertical surface,
By narrowing the interval between the first clamping member and the second clamping member, the hollow ring can be compressed from both sides, and the hollow ring can be expanded outward in the entire circumference. A square water stop plug characterized by   The square water stop according to claim 1, wherein the curvature radius of the curved surface of the corner piece is set to 100 to 110% of the outermost curvature radius of the curved portion of the hollow ring. plug. A water stop box is disposed at an intermediate position in the length direction of the cylindrical portion,
In the water stop box, the internal space communicates with the proximal end portion of the cylindrical portion and the internal space of the distal end portion, respectively.
By placing a water stop plate in the water stop box and bringing it into close contact with the inner wall surface on the upstream side, the space between the internal space of the water stop box and the internal space of the proximal end portion of the cylindrical portion The rectangular water-stop plug according to claim 1 or 2, wherein the rectangular water-stop plug is configured to be capable of blocking the water.   An opening for taking out or inserting the water stop plate disposed inside is formed above the water stop box, and a lid is fixed to the opening for sealing. The square water stop plug according to claim 3, wherein a flange is formed.   A number of bolt holes are formed on one side of the water stop box, and a number of bolts are inserted from the outside to the inside of the water stop box through the bolt holes, By tightening the bolt, the water stop plate arranged inside the water stop box is pressed against the inner wall surface on the upstream side of the water stop box and can be brought into close contact with the water stop box. The rectangular water stop plug according to claim 3.

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