JP2525890Y2 - Masu for manhole formation - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manhole forming basin (handhole) which can form a manhole serving as a relay point of a power line or a communication line buried underground simply by embedding it.

[0002]

2. Description of the Related Art In recent years, instead of telephone poles on the ground, electricity is distributed to various places through power lines and communication lines in underground piping, and signals such as telephones are transmitted. However, when a power line or a communication line is passed through underground piping, inspection and replacement of the wiring cannot be easily performed as in the case of wiring on the ground using a conventional power pole.

Therefore, usually, a manhole is provided for each predetermined section, underground wiring is performed so as to relay the manhole, and inspection or replacement of the wiring is performed by entering a manhole or the like. This type of manhole is manufactured in advance by manufacturing a manhole-forming measure (hereinafter, simply referred to as “measures”) in the shape of a manhole and embedding this measure in the ground so that it can be formed quickly and easily. I have.

[0004] As shown in FIGS. 14 and 15, a hole 102 is formed in a side wall surface of a basin 101 buried at the site, and a corrugated tube 10 made of synthetic resin is put through an adhesive 103.
4 and the metal tube 105 are connected.

[0005]

[Problem to be solved by the invention] However, the conventional measure 10
In the case 1, since the entire pit is made of concrete and, of course, the perforated portion is also made of concrete, when the hole 102 is pierced on site using a drill or the like, cracks are likely to occur around the hole 102. If this crack is left as it is, groundwater or the like may flow from underground into the inside of the basin 101 from the ground, and the electric wire may be short-circuited or corroded. Therefore, the crack is usually repaired with an adhesive. However, repair work requires time and skill and is very troublesome.

On the other hand, a special device can be used so as not to cause cracks, but it is very large and costs too much. On the other hand, a manhole-forming pit for forming a manhole serving as a relay point for a power line or a communication line, a pit body is formed of concrete, and a sewage described in Japanese Patent Application Laid-Open No. 63-83336 is provided in advance in a pipe connection hole forming portion. It is also possible to adopt a method in which a synthetic resin tube is embedded like a basin.

However, in the case of a manhole serving as a relay station for a power line or a communication line, a large number of pipes are connected to each surface of the manhole instead of one pipe connected from one direction as in a sewage basin. You. Therefore, JP-A-63-
In a structure in which a synthetic resin pipe is inserted as in JP-A-63336, a large number of synthetic resin pipes must be inserted into one surface of a manhole in advance, and the productivity is extremely poor. Moreover, there is a problem that the cost is too high.

In the sewage basin disclosed in Japanese Patent Application Laid-Open No. 63-63336, a convex annular portion having a substantially T-shaped cross section is provided around the synthetic resin tube, and the synthetic resin tube is made to have a different thermal expansion coefficient from concrete. Although no gap or the like is formed between the main body of the basin and the like, there is a problem in that the structure is complicated and the cost of the mold is increased, and the production cost is increased such that the synthetic resin tube is bulky during transportation and storage. In view of such circumstances, the present invention
To provide a basin in which connection holes are easily drilled, and the drilling does not cause cracks or the like around the connection holes, is excellent in pipe connection workability, and has good manufacturing workability and low manufacturing cost. It is an object.

[0009]

In order to achieve such an object, a basin according to the present invention is a relay station for a pipe which is buried underground and through which a power line or a communication line crawled underground passes. In the manhole forming basin to be formed, a flat plate made of a flexible resin in which a number of small holes are perforated along the peripheral edge is embedded in a concrete material constituting the main body of the rim including the small holes, and In addition, a configuration is adopted in which a part of the concrete material is insert-molded into the box body so as to fill the inside of the small hole, and a wall surface of a portion serving as a connection portion of the pipe is formed.

In the above configuration, the flexible resin may be
Although not particularly limited, polyvinyl chloride resin, polyethylene resin and the like can be mentioned. In addition, it is preferable that the measure body is a unit type in which small divided bodies that are divided in the horizontal direction are stacked.

[0011]

According to the above construction, the ground is excavated and the basin is set in the ground in the same manner as the conventional basin, and the connection hole is formed in a desired portion. Since it is formed of a flat plate made of flexible resin, connection holes can be formed at any positions. Moreover, since the wall surface serving as the connection hole forming portion is formed of a flexible resin, the hole can be easily formed using a drill or the like without using a soft and large-sized device, and the connection hole can be formed around the connection hole. No cracking or the like occurs.

Further, since a part of the concrete material constituting the basin body enters the small holes, the expansion and contraction of the flat plate due to a change in the surrounding environment such as the outside air temperature is prevented. Further, since a flat plate having a small hole is used to provide the connection hole forming portion, the cost of the mold can be reduced, and since there is no projection projecting around the flat plate, it can be transported or stored before manufacturing. Sometimes not bulky.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof. FIG. 1 and FIG. 2 show an embodiment of the measure according to the present invention. As shown in the figure, this measure 1 is formed by stacking five concrete division units 11 to 15.

Of the five divided units 11 to 15, the upper two divided units 14 and 15 are entirely made of concrete, and the three lower divided units are those whose main body 1a is made of concrete. A connection hole forming portion 2 made of a flexible resin material is provided on four sides. Further, the dividing unit 1 of the present embodiment
As shown in FIG. 3, a number of small holes 2
A rectangular flat plate 22 made of a flexible resin provided with 1 is set in a mold, and concrete is poured into the mold to be molded. Therefore, as shown in FIG. 4, a part of the concrete forming the main body 1a enters the small hole 21 in a state of being filled, and the flexible resin plate 22 is surely integrated with the main body 1a by insert molding. .

Further, as shown in FIG. 5, each of the divided units 11 to 15 is provided with a screw hole 16 on the upper surface of the four corners, into which the screw portion 31 of the hanging metal fitting 3 is screwed. This screw hole 16
Is filled with grease. That is, the screw holes 16
Is formed by embedding a metal insert provided with a female screw into the divided units 11 to 15, so that when each of the divided units 11 to 15 is exposed to wind and rain for a long time at the construction site, the inside of the screw hole 16 is formed. Rusted, screw hole 16
Although the hanging bracket 3 cannot be attached due to accumulation of dirt and the like, since the basin 1 of this embodiment is filled with grease, rust generation and intrusion of dirt can be prevented at all times. The hanging fitting 3 can be attached smoothly.

Next, the steps of laying the basin 1 will be described in order. As shown in FIG. 6, after burying the burial hole 4 of the basin 1 at the position where the manhole is to be placed, the gravel 41 is placed at the bottom of the hole 4.
Spread.

The screw portions 31 of the hanging members 3 are screwed into the screw holes 16 provided at the four corners of the division unit 11, and the hanging members 3 are fixed to the four corners of the division unit 11. A hook (not shown) at the tip of the chain 33 hung from a crane (not shown) is hooked and suspended on the gravel 41 by a crane as shown in FIG. The hanging fitting 3 is removed, and as shown in FIG. 8, it is adjusted to be horizontal and installed at a predetermined position.

As shown in FIG. 9, the adhesive 17
Is applied. As shown in FIG. 10, the next divided unit 12 is similarly stacked on the divided unit 11. And
, The cell 1 of FIG. 1 can be laid in the hole 4.

On the other hand, in order to connect a conduit or the like to the basin 1 laid in this way, first, a hole is drilled in a desired connection hole forming portion 2 with a drilling tool such as a drill 4 as shown in FIG. However, since the connection hole forming portion 2 is formed of a flexible resin material, the hole can be formed very easily. Moreover, since no cracks or the like are generated around the hole, there is no need to perform any operation such as repairing the cracks. Then, as shown in FIG. 12 or FIG. 13, a synthetic resin short tube 5 with a flange having an inner surface shape along the outer surface shape of the corrugated tube or a synthetic resin short tube 6 with a flange internally provided with a female screw is used. By attaching via a waterproof adhesive 7 so as to protrude to the outside of the basin 1, the synthetic resin corrugated tube 8 or the metal tube 9 threaded at the end can be easily stopped at a desired position of the basin 1. It is designed to be easily attached to water.

In the above embodiment, the basin 1 is formed by stacking the five divided units 11 to 15. However, six or more divided units or four or less divided units are stacked. It may have a structure or may not be divided.

[0021]

[Effects of the Invention] The manhole forming measure according to the present invention is:
With the above configuration, no crack or the like is generated around the connection hole even when the connection hole is drilled. Moreover, the connection hole forming portion is softer than the conventional one. Therefore, the work of forming the connection hole can be easily performed on site, and the workability is greatly improved without repairing cracks.

In addition, since the flat plate is merely insert-molded into the concrete material constituting the pit body, the manufacturing cost can be reduced. In addition, since the concrete material enters the small holes and is connected to the inside of the small holes, the concrete and the concrete can be connected. Even if there is a difference in the coefficient of thermal expansion between the flexible resin and the flat resin, the flat plate is firmly held by the main body without any gap or the like between the flat plate and the main body. That is, it is excellent in watertightness and also excellent in strength.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a measure according to the present invention.

FIG. 2 is a vertical sectional view of the measure of FIG. 1;

FIG. 3 is a cross-sectional view illustrating an example of a flexible resin plate that forms a connection hole forming portion of the measure of FIG.

FIG. 4 is a cross-sectional view showing a structure of a connecting portion between a flexible resin plate of the basin of FIG. 1 and a main body of the basin.

FIG. 5 is a perspective view illustrating a mounting structure of a hanging bracket to a division unit.

FIG. 6 is a view for explaining a laying process of the present invention, showing a state in which a hole for burial is excavated and gravel is laid at the bottom of the hole.

FIG. 7 is a diagram for explaining a laying process of the present invention, and is a diagram in which a first divided unit is hung in a hole.

FIG. 8 is a diagram for explaining a laying process of the present invention, and is a diagram for explaining a horizontal unloading process of the divided unit.

FIG. 9 is a perspective view illustrating a laying process of the present invention, showing a state in which an adhesive is applied to an upper end surface of the divided unit.

FIG. 10 is a view for explaining a laying process of the present invention, showing a state in which a second divided unit is hung in a hole and is stacked on the first divided unit.

FIG. 11 is a diagram illustrating an example of a drill for drilling a hole in a connection hole forming portion.

FIG. 12 is a diagram illustrating a step of connecting a corrugated pipe made of synthetic resin to the measure of FIG. 1;

FIG. 13 is a diagram illustrating a process of connecting a metal tube to the tub of FIG. 1;

FIG. 14 is a sectional view showing a state in which a corrugated hard polyethylene pipe is connected to a conventional measure.

FIG. 15 is a cross-sectional view illustrating a state in which a conduit is connected to a conventional measure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Masu 2 Connection hole formation part (connection part) 8 Synthetic resin corrugated pipe (piping) 9 Metal pipe (piping) 21 Small hole

Claims (1)

(57) [Scope of request for utility model registration] 1. A manhole forming basin which is buried underground and serves as a relay point of a pipe through which a power line and a communication line are routed underground, and a large number of small holes are formed along the periphery. A flat plate made of a flexible resin is insert-molded in the box body in a state where the peripheral portion including the small hole is embedded in the concrete material constituting the box body, and a part of the concrete material is filled in the small hole. A manhole forming basin, wherein a wall surface of a portion serving as a connection portion of the pipe is formed.