JPS6135360B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a prop device capable of supporting segments of a roadway portion during tunnel excavation, and at the same time, capable of holding an earth removal belt conveyor, a drainage pipe, a power supply cable, and the like.

The shaft is equipped with an earth removal belt conveyor to remove excavated soil and spring water that accumulates at the excavation face toward the shaft entrance, drainage pipes, and power distribution cables to send power to various machinery such as excavators. However, these belt conveyors, pipes, cables, etc. are held by hooks and holders formed on the shoring that supports the existing segments.

However, forming hooks and holders on the above-mentioned shoring and attaching cables, conveyors, etc. requires a considerable amount of time and effort, and there is a problem in that it is not easy to install, remove, or dismantle the shoring.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a prop device for tunnel excavation which has locking means such as pipes, cables, and conveyors, and which allows the installation and removal of the props to be carried out substantially automatically.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the strut 1 in the unfolded state.

The strut 1 has a body part 2 and a pair of leg parts 4 formed below the body part 2 with a gap 3 through which a truck (to be described later) can pass.
and a plurality of arm portions 5 protruding left and right from the body portion 2 and leg portions 4, and these have a skeleton made of steel.

The left and right members 6 and 7 of the support column 1 are connected by a hinge 8 at the center of the body 2, so that the support column 1 can be folded and unfolded. The legs 4,
The length is set so that the lines connecting the vertices of the arm portion 5 or the body portion 2 pass approximately on the same circumference.

9 connects the ends to the left and right members 6 and 7, respectively;
Support 1 is compressed by air from a compressor (not shown).
It is an air cylinder that folds and unfolds. however,
The arm part 5a located on the body part 2 is attached to the body part 2 so as to be freely rotatable, and is expanded by a unique air cylinder 9a prior to the deployment of the column 1, and folds the column removed from the truck. Tatami is designed to be able to temporarily support the standing position.

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The top of the trunk 2, the lower ends of the legs 4, and the tips 10 of the arms 5, 5a are each capable of expansion and contraction. That is, each end 10
Each of the piston rods 11 is provided with an air cylinder 11, and the piston rod 13 of this cylinder 11 is equipped with a stopper plate 12 at its tip, and when compressed air is supplied, it extends from the cylinder 11 and presses the inner surface of the existing segment 14 with the stopper plate 12. do.

15 in the figure is a hanging part formed in the shape of an abbreviation for hanging an earth removal pipe, cable, conveyor, etc.
It is fixed to the arm portions 5 that protrude left and right.

On the other hand, as shown in FIG.
Wheels 18 are provided on the bottom plate 19 so as to run on rails 17 laid inside.

Hinged left and right side plates 20 and 21 are attached to the left and right sides of the bottom plate 19, and both sides of the plates 20 and 21 can be opened from the bottom plate 19 via an air cylinder 22. And on both side plates 20 and 21,
A semicircular storage recess 23 is formed in which each folded column 1 is placed sideways, and a semicircular movable ring 25 is formed along the inner periphery of the storage recess 23.
is provided so as to be rotatable in the circumferential direction. The movable ring 25 has a gear portion 25A formed on the back surface of its outer periphery.

On the inner surface of the semicircular movable ring 25, a plurality of fixing fittings 26 for fastening the tip end 10 of the support column 1 are provided at appropriate intervals. The gear portion 25A of the movable ring 25 is interlocked with the drive motor 31 via a clutch and a reduction gear (not shown), so that it can rotate at least 90 degrees from the state shown in the figure.

Note that the drive motor 31 also functions as a power source for the wheels 18, and is therefore linked to an axle via a clutch and a transmission gear (not shown) to allow the trolley 16 to travel on its own.

Next, I will explain the effect.

The support column 1 is folded by contracting the air cylinders 11 at each end 10 and placed horizontally in the storage recess 23 of the trolley 16 as shown in FIG. and secure it to the left and right movable rings 25. In this state, the trolley 16 is made to travel within the roadway to a predetermined installation location.

Therefore, the drive motor 31 is connected to the gear section 25.
A, the left and right movable rings 25 are rotated approximately 90 degrees around the center 24 of the storage recess 23, and the support column 1 fixed to the movable ring 25 is rotated in the fourth direction.
Stand up vertically as shown in the figure.

In this state, first, the fixing metal fitting 26 of the rotating arm portion 5a
Loosen the arm 5a to release it, open the arm 5a by operating the air cylinder 9a, and when the left and right sides are fully opened in a straight line (orthogonal to the axis of the segment 14), the rod 13 at both ends 10 of the arm 5a is opened. is extended and the inner surface of the segment 14 is pressed by the contact plate 12, and the support column 1 is supported in an upright state by this pressing reaction force.

Next, the fixing fittings 26 of the remaining arms 5, legs 4, etc. are loosened to free the support 1 from the movable ring 25, and the movable ring 25 is returned to its original position. Next, the air cylinder 22 is operated to close the side plates 20, 2 of the truck 16.
1 is opened outward, the support column 1 is completely removed from the trolley 16. After moving the trolley 16, the air cylinder 9 is activated to further expand both members 6 and 7 of the support column 1, and when they are fully opened, the tips 11 of the body 2, legs 4, and remaining arms 5 are sequentially extended and the inner surfaces of the segments 14 are pressed by each contact plate 12, and in this way, the strut 1 is supported by the pressing reaction force and firmly installed on the dragway, as shown in FIG.

Therefore, the soil removal belt conveyor 27, the drainage pipe 28, the power distribution cable 2
By placing extensions such as 9, these are arranged in an orderly manner. In addition, if an inclined plate 30 is formed on the substantially U-shaped hooking part 15 to guide the engagement of the belt conveyor 27, pipe 28, cable 29, etc. from the outside, the support 1 When installing the support column 1, the pipe 28 and the like can be automatically engaged with the hook part 15 by the guide of the inclined plate 30 as the support column 1 is expanded.

When the installation of the support column 1 is completed, the cart 16 closes the side plates 20 and 21 and runs back to the original position with the storage recess 23 empty. Furthermore, when the excavation face advances further and the pillar 1 is erected at the back of the tunnel, the cart 16 carrying the pillar 1 as described above passes through the gap 3 and goes deeper into the tunnel without being deterred by the existing pillar 1. transported.

On the other hand, when removing the strut 1 from the segment 14, the empty truck 16 is driven to the position of the strut 1,
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In the opposite manner to the above, first fold up the support 1 leaving the rotating arm 5a, and then remove the fixing metal fitting 26 of the movable ring 25.
These tips 10 are then tightened. Next, arm part 5
When the movable ring 25 is moved after closing the column a and fixing the tip end 10 to the fixing fitting 26, the column 1 is folded and stored in the storage recess 23.

As explained above, according to the present invention, the installation and removal of support columns can be performed automatically and mechanically, and at the same time, cables, conveyors, pipes, etc. extending inside the dragway can be easily maintained, thereby streamlining tunnel construction. Labor saving can be promoted.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view of the column in an expanded state, FIG. 2 is a partially cutaway perspective view of the truck, and FIGS. It is a schematic diagram showing an installation process. 1...Strut, 2...Torso, 4...Leg, 5...
Arm part, 10...Tip part, 16...Dolly, 23...
Storage recess, 25...Movable ring.

Claims (1)

[Claims] 1 It has arms that project left and right with respect to the torso and a pair of legs that extend downward, and is configured to be foldable and unfoldable left and right around the torso, and the torso, arms, and legs A support column whose each end is extendable and a bottom plate with wheels are provided with side plates that can be expanded freely on both sides, and a semicircular storage recess that opens at the top of this side plate is formed. A movable ring that can be rotated by at least 90 degrees along the inner periphery of the container is provided, and this movable ring is provided with a means for removably fixing the folded column that is placed sideways in the storage recess. A prop device for tunnel excavation, characterized by comprising a combination with a truck.