JPH0426556Y2 - - Google Patents

Description

[Detailed explanation of the invention] <Industrial application field> Construction work in which a Huyum pipe, etc. is introduced from a vertical shaft into the underground part of a road, and the pipe is pushed and laid along a predetermined route.
As shown in FIG. 6, first, at night when there is no traffic, the lining plate 8 blocking the shaft 1 is removed by a truck crane 9, and the shaft opening 11 is opened. Next, the hump pipe 74 is introduced through the shaft opening 11 via the truck crane 9, etc., and the propulsion jack 7
5 etc. will be used to push the pipe and lay it. On the other hand, during the day, there was a lot of traffic, and traffic was stopped.
It was extremely inconvenient to carry out the laying work, so the lining board 8 was suspended by a truck crane 9, etc.
The shaft opening 11 is closed to form a normal road.

<Problems to be solved by the invention> As mentioned above, when pushing and laying Huyume pipes etc. underground on roads with heavy traffic, the construction work should be carried out only at night, and during the day the opening of the shaft should be closed using lining boards. is blocking the section. Therefore, it is necessary to move and install the lining boards at the beginning and end of the construction work. As a result, the construction period is lengthened and construction costs are also rising. Furthermore, the method of removing the lining plate requires equipment such as a truck crane, which presents many problems.

<Means for solving the problem> The present invention was devised in view of the above problem.
A telescopic column consisting of an inner column and an outer column is erected in the shaft,
A lining plate is attached to the top of this inner column and the inner column is extended by a lifting jack.The lining plate is raised to open the above-ground opening of the shaft, and by further reducing the inner column, the lining is expanded. The above-ground opening of the shaft is closed by lowering the plate.

<Function> In other words, when working at night, by extending the lifting jack and raising the lining plate, the above-ground opening of the shaft will be opened, soil will be removed from this above-ground opening, and the hump pipe etc. will be opened. Just put it in. Also, at the end of the daytime work, by retracting the lifting jack and lowering the lining plate, the above-ground opening of the shaft will be closed and the top surface of the normal road will be formed. Therefore, there is no need for a truck crane or the like to remove and install the lining plate itself, and furthermore, the length allows the telescopic column to be erected within the shaft, so it does not interfere with the work.

<Example> The opening/closing device for an above-ground shaft opening of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic side view illustrating a push pipe and installation work using the opening/closing device of the present invention, and FIG. 2 is a front view thereof. First, the opening/closing device for the above-ground shaft opening will be explained. This opening/closing device is installed at each corner of the shaft 1.
A total of four telescopic pillars 2 are erected, and beams 4 are constructed on the telescopic pillars 2 to form a so-called tower shape.
A lining plate 5 made of a steel plate or the like is attached to the beam 4. Further, a movable hoist beam 6 is provided approximately in the middle of the beam 4 via an electric trolley 61 in the direction in which the humid pipe is laid, and an electric hoist 62 is further attached to the movable hoist beam 6 so as to be movable. There is. FIG. 3 is a schematic diagram illustrating the telescoping mechanism of the telescoping column 2. FIG. That is, the telescopic column 2 includes a hollow outer column 21 and a hollow inner column 22 fitted into the outer column 21. The inner column 22 is expanded and contracted by this lifting jack 3. A base 23 is attached to the lower part of the outer column 21, and this base 2
A lifting jack 3 is attached on top of the lifting jack 3. That is, a chain 33 is stretched around a sprocket 32 provided on a telescopic tube 31 of the lifting jack 3, one end of the chain 33 is tied to a chain anchor 24 provided on a base 23, and the other end is attached to a lower end 22a of an inner column 22. This is what was attached to it. Therefore, when the lifting jack 3 is extended, approximately 2 of this extension stroke
The inner column 22 rises to double the stroke, and the telescopic column 2
It will extend the whole thing. On the other hand, by reducing the lifting jack 3 by 1/2 of the stroke, the inner column 22 is accommodated within the outer column 21, and as a result, the length of the telescopic column 2 is reduced by the length of the stroke. In this way, a telescoping mechanism whose main component is the elevating jack 3 is provided in each telescoping column 2, and to the elevating jack 3 itself, pneumatic pressure or oil pressure from a multi-pump (not shown) is branched and transmitted using a distribution valve. Therefore, the lifting jacks 3 can be driven synchronously.

Note that the telescopic mechanism does not need to be provided on all the telescopic columns, and if necessary, it may be provided, for example, on a pair of diagonally located telescopic columns, and the mechanism will be driven in the same way.

Next, we will explain how to push and lay a hump pipe using the above-mentioned opening/closing device for the above-mentioned shaft opening.

First, the above-mentioned lifting jack 3 is extended to extend the telescopic column 2, the lining plate 5 is raised as shown in FIG. 4, the shaft opening 11 is opened, and the truck 7
The movable hoist beam 6 is extended via the electric trolley 61 to the fume pipe 74 that has been transported to the vicinity by a conveyance means such as 6, and the hoist 63 is further hung on the fume pipe 74 by the electric hoist 62. Then lift it up and throw it into the shaft 1 through the shaft opening 11. On the other hand, the earth and sand hopper 73 provided on the movable pedestal 72 is retracted above the propulsion jack 75 and does not get in the way when the fume pipe 74 is introduced. In addition, prior to charging the hume pipe 74, the excavated earth and sand to be laid are put into the bucket 71 by the hume pipe 74 and discharged to the outside of the shaft 1 via the earth and sand hopper 73 by the electric hoist 62.

In this state, the fume pipe 74 is placed at a predetermined position, and the pipe is pushed to a predetermined position by the propulsion force of the propulsion jack 75 and laid.

After the above-mentioned work is completed, the lifting jack 3 is reduced again in the daytime, for example, and the lining plate 5 is lowered to cover the shaft opening 11. The shaft opening covered by this lining plate 5 forms a normal road surface.

In the above explanation, the excavation work of earth and sand, the work of introducing the humid pipe, the work of pushing the pipe, and the laying work are performed at night, and the work is stopped by closing the lining board during the day, but it is not necessarily limited to this procedure. During the daytime construction work, traffic is temporarily stopped and the lining board is lifted to carry out the earth and sand and the humid pipe is brought in, as described above, and then the lining board is lowered and the shaft opening 1 is opened.
1 and lift the traffic closure, it is also possible to continue pushing and laying pipes inside the shaft using propulsion jacks.

<Effects of the invention> As explained above, the opening/closing device for above-ground shaft openings of the present invention can raise and lower the lining plate without using a truck crane or the like at the start and end of construction. Therefore, the work of pushing and laying the hump pipe under the road is made extremely easy. In addition, by appropriately stopping traffic not only at night, but also during the day when there is heavy traffic, it is possible to continue the pipework construction, which is extremely effective, reducing construction costs and significantly shortening the construction period. It has great practical effects.

[Brief explanation of the drawing]

Fig. 1 is a side view illustrating a push pipe and laying work using the opening/closing device of the present invention, Fig. 2 is a front view of the same,
FIG. 3 is a schematic diagram illustrating the expansion and contraction mechanism of the expansion and contraction tube;
FIG. 4 is a schematic side view showing the shaft opening in an open state, FIG. 5 is a schematic front view thereof, and FIG. 6 is a schematic diagram illustrating a conventional push pipe and construction work. 1... Vertical shaft, 11... Shaft opening, 2... Expandable pipe, 21... Outer column, 22... Inner column, 3... Lifting jack, 5... Lining plate.

Claims (1)

[Scope of claim for utility model registration] A telescopic column consisting of an inner column and an outer column is erected in a shaft,
A lining plate is attached to the upper part of the inner column, and the inner column of the telescopic column is extended by an elevating jack to raise the lining plate, and at the same time, the above-ground opening of the shaft is opened, and the inner column is raised. An opening/closing device for an above-ground shaft opening, characterized in that the above-ground opening of the shaft is closed by reducing the lining plate and lowering the lining plate.