JPH1060992A - Fitting plate device for construction for repairing or providing side surface hole of existing manhole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the strength by filling a clearance between a curved cylindrical body of a fitting plate and a circular hole of a manhole side wall with the filling material, and pinching a rubber gasket in a straight cylindrical body of the fitting plate, and fitting a push-ring so as to enlarge the diameter. SOLUTION: A circular hole 3 for repair or the like is drilled in a curved cylindrical side wall 2 of an existing manhole 1 in a construction field. A curved cylindrical body 6a of the fitting plate 4 is inserted into the hole 3 so as to form a side surface hole 6, and while a flange part 5 is fitted to an outer surface of the side wall 2 by a bolt 10. A coil-shaped reinforcement 11 is pinched in a clearance 6b between the cylindrical body 6a and the hole 3, and this clearance 6b is filled with mortar for sealing. A rubber gasket 14 is fitted in a straight cylindrical body 9, and a push-ring 16 is fitted inside of a branched part 14a so as to enlarge the diameter, and the branched part 14a is made to pressure-contact with the inner surface of the cylindrical body 9. Furthermore, a flowing pipe 15 is fitted in the gasket 14, and fixed by a fastening bolt 21. With this structure, a clearance between the hole 3 and the cylindrical body 6a is strongly sealed, and the strength can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting plate device for repairing or expanding damaged side holes in an existing manhole.

[0002]

2. Description of the Related Art When a side hole for connecting a pipe in an existing manhole is damaged due to an earthquake, land subsidence, or the like, or when adding a side hole for connecting a pipe, a new side hole is drilled at the site. In other words, the drilling of the side hole at the site is different from the drilling by the drilling machine at the factory, and it becomes a rough rough surface, and the inner circumferential surface of the hole has to be repaired with cement mortar. .

[0003]

However, there is a problem that repair of side holes with cement mortar requires skill and the strength is insufficient. Also, as the size of the bottomed cylindrical manhole increases, the curvature of the side hole also increases, and the intermediate press ring for diameter expansion acts only on the short straight part in the middle of the side hole. There was a problem that a loose portion was generated.

[0004]

SUMMARY OF THE INVENTION The present invention provides a composite sheet for press molding in which glass fiber is mixed with a thermoplastic resin to enhance acid resistance and impact resistance. A flange portion attached to the outer surface surrounding the
A circular cylindrical body fitted into the circular hole inside the flange, and a short straight cylindrical body having an outer end surface having a straight end surface passing through the outer surface of the side wall of the manhole outside the circular cylindrical body. Pressing the mounting plate, and closing the gap between the circular cylindrical body and the circular hole formed on site by filling with a filler such as mortar,
It is an object of the present invention to solve such a problem by fitting a rubber gasket in a straight tubular body of the mounting plate with a middle-diameter ring for diameter expansion and expanding the diameter.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

A circular hole 3 is drilled on the curved side wall 2 of an existing manhole 1 having a bottom for repair or extension at the site. The peripheral surface of the circular hole 3 has a rough surface with irregularities. Reference numeral 4 denotes a mounting plate, which is press-formed using a composite sheet for press molding in which a suitable amount of chopped glass fiber is mixed with a thermoplastic resin to enhance strength, impact resistance and acid resistance. The mounting plate 4 has a flange 5 in contact with an outer surface surrounding the circular hole 3 of the existing manhole 1, and a circular cylindrical body which is fitted into the circular hole 3 from the outside and forms a side hole 6 inside the flange 5.
6a and a short and straight tube-shaped cylindrical body having outwardly extending portions 7a and 7b provided on both sides following the circularly-shaped cylindrical body 6 and having an outer end surface as a straight end surface 8 passing through the outer surface of the curved side wall 2 of the existing manhole 1. 9 is formed. The circular cylindrical body 6a is formed as a circular body whose both sides are bent inward along the circular shape of the side wall 2 of the existing manhole 1.

The following table is an analysis table showing an example of an embodiment of a composite sheet for press molding.

[Table 1]

The mounting plate 4 has a new side hole 6 formed by inserting a circular curved cylindrical body 6a into the circular hole 3 from the outside.
To the outer surface of the side wall 2 with bolts 10
Reinforcing coil wound around the gap 6b between
Mortar 12 with elasticity is sandwiched between 11 and closed.
Reference numeral 11a denotes a ridge provided on the outer periphery of the circular cylinder 6a for preventing the rebar 11 from being pulled out. A water-swellable rubber layer 13 is provided on the peripheral surface of the flange 5 on the side where the manhole 1 is mounted by coating or bonding or the like to prevent water leakage from between the flange 5 of the mounting plate 4 and the outer surface of the manhole 1. . Further, the bolt 10 may be fixed by driving the bolt receiving anchor member into the side wall 2 instead of penetrating the side wall 2 of the manhole 1. In addition, auxiliary washers 10 made of water-expandable rubber
Insert a to prevent water leakage.

Thus, the rubber gasket 14 is inserted into the straight tubular body 9 following the side hole 6, and the inside of the manhole 1 is inserted into the branch portion 14a of the rubber gasket 14 which is in contact with the straight tubular body 9. The branching portion 14a is pressed against the inner surface of the straight tubular body 9 by fitting and expanding the intermediate pressing ring 16 for diameter expansion. The center-pressing ring 16 for diameter expansion passes through the center of the thickness of the curved side wall 2 of the manhole 1. A water pipe 15 is attached to the other end of the rubber gasket 14 that is exposed outside the manhole 1.
And tightened and fixed with the tightening belt 21. Reference numeral 22 denotes a stopper wound or adhered near the end of the water pipe 15 to prevent the water pipe 15 from being pulled out.

A rib 18 having a vertical or lattice-like projection 17 is provided between the flange 5 of the mounting plate 4 and the straight tubular body 9 for reinforcement. The provision of the concave and convex strips 19 on the inner surface of 9 is advantageous in preventing the rubber gasket 14 from slipping.

Further, the inner gap 20 sandwiching the rubber gasket 14 in the side hole 6 is closed by filling the elastic mortar 12 described above.

[0012]

As described above, according to the present invention, even when a rough circular hole is opened on the side wall of an existing manhole, a circular cylinder provided on a mounting plate is fitted into the circular hole. Accordingly, since a gap is formed between the circular hole and the filler such as mortar so that a filler such as mortar can be filled, an effect is obtained that the space between the circular hole and the circular cylinder can be firmly closed.

[0013] Also, when the existing cylindrical manhole with a bottom is enlarged, a straight tube is provided outside the curved tube, so that the intermediate push ring for expanding the diameter is the full length of the straight tube. There is an effect that the inner diameter of the straight tubular body can be pressed against the entire length of the branch portion of the rubber gasket due to the effect of expanding the diameter in the middle.

Since the straight tubular body is formed short and short so that the center of the straight end face passes through the outer surface of the side wall of the manhole, the fitting and the expanding action of the intermediate push ring for increasing the diameter are close to the inside of the manhole to be worked. As a result, an effect can be obtained that it can be performed easily and reliably.

Since the mounting plate is press-formed with a composite sheet obtained by mixing a thermoplastic resin and glass fiber,
This produces an effect that acid resistance and impact resistance can be significantly enhanced.

Since the protrusion is provided on the outer periphery of the circular cylinder to prevent the rebar from being pulled out, it is possible to prevent the elastic mortar filling the gap between the circular cylinder and the circular hole from falling off. Produces an effect.

Since the water-expandable rubber layer is provided on the inner surface of the flange, an effect is obtained that water leakage can be reliably prevented from occurring between the mounting plate and the outer surface of the manhole.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state in which a mounting plate device is mounted on a manhole, and a water pipe is fitted through a rubber gasket.

FIG. 2 is a cross-sectional view showing a state where a mounting plate device is mounted in a circular hole of a large manhole.

[Explanation of symbols]

 1 is a manhole 2 is a circular side wall 3 is a circular hole 4 is a mounting plate 5 is a flange 6 is a side hole 6a is a circular cylinder 7a, 7b is an overhanging part 8 is a straight end face 9 is a straight pipe cylinder 10 is a bolt 11 is a reinforcing bar 12 is an elastic mortar 13 is a water-expandable rubber layer 14 is a rubber gasket 15 is a running water pipe 16 is a middle press ring 17 is a protruding strip 18 is a rib 19 is an uneven strip 20 is an inner gap 21 is a fastening belt 22 is a stopper

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shin Otsuga 3-7-20 Nakajima, Toyama City, Toyama Prefecture Satake Building 2F, Sanritsu Co., Ltd. (72) Inventor Soji Ishinada 3-7-20 Nakajima, Toyama City, Toyama Prefecture Satake Building 2F Sanritsu Co., Ltd.

Claims (5)

[Claims] 1. A composite sheet for press molding in which glass fiber is mixed with a thermoplastic resin to enhance acid resistance and impact resistance, and is attached to an outer surface surrounding a circular hole formed on the side wall of an existing manhole in contact with a surface. A short straight pipe having a flange portion to be formed, a circular cylindrical body fitted into the circular hole inside the flange portion, and an outer end surface on the outside following the circular cylindrical body having a straight end surface passing through the outer surface of the side wall of the manhole. A mounting plate having a cylindrical body is press-formed, and a gap between the circular curved cylindrical body and a circular hole formed in the field is closed by filling with a filler such as mortar, and a straight pipe-shaped cylindrical body of the mounting plate is formed. A mounting plate device for repairing or expanding side holes in an existing manhole, wherein an intermediate press ring for diameter expansion is fitted with a rubber gasket therebetween to expand the diameter. 2. The mounting plate device according to claim 1, wherein a protruding rib is provided between the flange portion and the straight tubular body. 3. The mounting plate device according to claim 1, wherein an uneven strip is provided on an inner surface of the straight tubular body. 4. The mounting plate device according to claim 1, further comprising a ridge for preventing the rebar inserted into the outer periphery of the circular cylinder from being pulled out. 5. The mounting plate device according to claim 1, wherein a water-expandable rubber layer is provided on the manhole mounting surface of the flange portion.