JPH0415834Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a work vehicle for tunnel support steel, which is used when carrying arc-shaped support steel provided on the inner wall of a tunnel into the tunnel and installing it. It is.

[Conventional technology]

Conventionally, the shoring steel was transported by attaching the shoring steel to a frame welded to the loading platform of a 4-ton truck and transporting it to a cutting point in the tunnel, where a loader shovel was used and a scaffold or bucket truck attached to the lift arm was used to transport the shoring steel. A worker is sitting on top of the tunnel and is working on attaching support steel to the tunnel's inner wall.

[Problem that the invention attempts to solve]

However, with this conventional method, it is necessary to prepare the loader shovel, etc., which has scaffolding for the installation work separately from the tunnel support steel transport vehicle, and even then, there are labor safety problems such as insufficient scaffolding. Ta.

An object of the present invention is to provide a work vehicle that utilizes a crawler damper vehicle and is useful for transporting tunnel support steel to an installation site and for installation work at the site, as well as ensuring a safe footing during work.

[Means for solving problems]

In the present invention, a three-dimensional frame structure 12 is attached instead of a dump body to a crawler dumper vehicle 11 that is equipped with a crane 13, and this frame structure 12 is attached to an inner space 1 of a base frame 12a.
9 is provided with an elevating frame 12b that can be raised and lowered by an elevating mechanism 26, a tunnel supporting steel suspension section 25 is provided on this elevating frame 12b, and a scaffolding member 23 can be opened and closed using a hinge 22 as a fulcrum at the lower side of the base frame 12a. This is a working vehicle for tunnel support steel, in which a scaffolding 21 is provided on the upper surface of the frame structure 12.

[Effect]

In the present invention, for example, a support steel 31 is placed on the suspension part 25 of the frame structure 12 from a material storage area,
It is carried to the construction site in the tunnel, the scaffolding members 23 on both sides are opened, and the elevating frame 12b is raised by the elevating mechanism 26 to raise the supporting steel 31.
A worker on the scaffolds 21 and 23 fixes the supporting steel 31 lifted or pushed up by the crane 13 to the inner wall of the tunnel.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings.

As shown in Figure 1, the crawler damper (crawler track 1
A frame structure 12 is removably attached to a vehicle 11 of a dump truck moving at zero speed by a large number of bolts instead of the original dump body. This frame structure 12 is formed by fitting an elevating frame 12b shown in FIG. 3 into a rear inner space 19 of a base frame 12a shown in FIG. 2 so as to be slidable in the vertical direction. As for the sliding mechanism, although not shown, the frame 12b may be formed to be able to slide vertically on a rail member provided on the base frame 12a via a guide roller or the like provided on the elevating frame 12b. desirable.

The crawler damper vehicle 11 is equipped with a telescopic crane 13, and this crane 13 has a retractable boom 14 integrally provided with a concave protrusion 15 at its tip, and a hook 17 suspended via a wire 16. It becomes.

The base frame 12a has an inner space 19 on the rear side of the vehicle 11 in which the elevating frame 12b is installed, a vehicle inspection lid plate 20 on the lower part on the front side, and an upper surface on the front side. scaffolding 21
and lower hinges on the left and right sides.
A scaffolding member 23 is provided which can be opened to a horizontal state using 22 as a fulcrum. Further, the elevating frame 12b is provided with a scaffold 24 on the upper surface, a scaffold (tool storage) 24' on the lower surface, two sets of support steel suspension parts 25 on the left and right parts, and an elevating mechanism for the upper beam member. A pair of lifting cylinders 26 are provided. The lower end of this cylinder 26 is pivotally supported on a mounting base 27 provided on the base frame 12a, as shown in FIG. 1, through a space other than the scaffold 24'. Further, the hydraulic circuit for driving the cylinder 26 is provided with a sudden drop prevention device such as a pilot check valve (not shown) that closes when the hydraulic pressure supplied to the cylinder 26 is exhausted for safety.

In addition, shape support members 2 are attached to both ends of the scaffold member 23.
The lower end of the scaffolding member 23 is rotatably attached to the shaft, and the supporting member 28 is fitted into a hole formed in a locking plate 29 that is integrated with the base frame 12a. A locking portion 30 welded to the upper end of the support member 28 engages with the locking plate 29 to maintain the horizontal state of the scaffolding member 23. Note that the scaffolds 21, 24 and the scaffold member 23
A wire mesh expander plate is attached to the.

Then, as shown in FIG. 4, a pair of supporting steels 31 (one pair is required for each cross-sectional radius of the tunnel) is placed on the two sets of suspension parts 25 and transported to the construction site in the tunnel. At this time, the crawler damper vehicle 11 moves forward into the tunnel, changes direction almost at the fixed position by driving the tracks 10 on both sides in opposite directions at the cut point, and then installs the support steel 31. You just need to back up a little to do this.

When installing the supporting steel 31, the scaffolding members 23 on both sides are opened and fixed horizontally with the help of the crane 13, and the rear lifting frame 1 is
2b by about 60 cm, for example, using the cylinder 26, and a worker on the scaffolds 21, 23, and 24 lifts and pushes up the supporting steel 31 using the self-mounted crane 13 and places it on the inner wall of one side of the tunnel. Fix it. At this time, first, the lower end of the support steel 31 lifted by the crane 13 is fixed to the lower part of the inner wall, and then the upper end of the support steel 31 is fixed with the concave projection 15 provided on the tip of the boom 14 of the crane 13. Hook it up and push it up to fix the upper end of this support steel 31 to the upper part of the inner wall. The remaining supporting steel is fixed to the inner wall of the other side of the tunnel in the same way.

This type of construction will be repeated to advance the tunnel support steel line.

The frames 12a and 12b may be loaded with sheet piles.

In addition, in FIG. 4, 33 is a ladder provided on the front side of the base frame 12a.

[Effect of idea]

According to the present invention, a three-dimensional frame structure is provided in place of the dump body on a crawler dumper vehicle equipped with a crane, and a tunnel support steel suspension section is provided on this frame structure, so that tunnel support steel can be loaded. , transport and installation work
This can be carried out using a stand-alone working vehicle, and the transport within the tunnel can be easily carried out based on the excellent direction change characteristics of the crawler dumper vehicle. Further, the frame structure is provided with an elevating frame that can be raised and lowered by an elevating mechanism in the inner space of the base frame, and a scaffolding member is provided at the lower side of the base frame so that it can be opened and closed using a hinge as a fulcrum, and a scaffolding member is provided on the upper surface of the frame structure. Since the scaffolding is provided, work can be carried out safely by using the self-mounted crane and secured scaffolding in stages of different heights, and the scaffolding members etc. can be stored during transportation, so there are no obstacles to movement. No.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of a working vehicle for tunnel support steel of the present invention, Fig. 2 is a perspective view of its base frame, Fig. 3 is a perspective view of its elevating frame, and Fig. 4 is its operation. It is an explanatory diagram of a state. DESCRIPTION OF SYMBOLS 11... Crawler damper vehicle, 12... Frame structure, 12a... Base frame, 12b...
... Lifting frame, 13 ... Crane, 21 ... Scaffolding, 22 ... Hinge, 23 ... Scaffolding member, 25 ...
... Tunnel support steel suspension part, 26 ... Cylinder as a lifting mechanism, 31 ... Support steel.

Claims (1)

[Scope of utility model registration request] A three-dimensional frame structure is attached in place of the dump body to a crawler dumper vehicle equipped with a crane, and this frame structure has an elevating frame that can be raised and lowered by an elevating mechanism in the inner space of the base frame. The tunnel supporting steel is characterized in that the elevating frame is provided with a tunnel supporting steel suspension part, a scaffolding member is provided at the lower side of the base frame so as to be able to open and close using a hinge as a fulcrum, and the scaffolding is provided on the upper surface of the frame structure. work vehicle.