JPH0334522B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a bridge construction vehicle used when the main girder spacing increases or decreases during construction.

(Prior Art) The present applicant has already filed an application for this type of construction work vehicle. (Special Patent Application No. 56-98065 [Special Patent Application No. 58-49643
This construction vehicle has a main truss and a cross beam slidably attached via sliding plates, a lateral movement rail is laid on the concrete bridge surface, and lateral movement wheels are installed at the bottom of the main truss. It is configured to move laterally using a hydraulic cylinder.

In the case of such a configuration, the forward movement and the lateral movement of the main girder truss cannot be performed at the same time, which requires separate work and is time-consuming.

Therefore, there is a need for an erection work vehicle that can move quickly and can move more smoothly laterally.

(Object of the Invention) This invention was proposed in view of the above-mentioned circumstances, and its purpose is to provide an erection system that can simultaneously perform forward movement and lateral movement, and that can also perform smooth lateral movement. Our goal is to provide work vehicles.

(Structure of the Invention) An erection work vehicle according to the present invention has a main body truss which has wheels at the lower part and is movable in the length direction of the bridge and is arranged in plurality at intervals in the width direction of the bridge, and a bridge truss. The construction vehicle has a plurality of cross beams that extend along the width direction of the bridge, are mounted on top of the plurality of main trusses, and are arranged at intervals in the length direction of the bridge, the main truss being The fixed main truss is divided into a fixed main body truss and the moving main body truss, and the fixed main body truss and the cross beam are rigidly connected. It is made to be movable in the width direction, and can perform forward movement and lateral movement at the same time.

(Example) The present invention will be described below based on an illustrative example.

As shown in Fig. 1, the construction vehicle A has wheels 2, 3, and 4 on the lower part and is movable in the length direction of the bridge B, and a plurality of vehicles are arranged at intervals in the width direction of the bridge B. A main truss 1 arranged in a parallelogram shape, and a plurality of main truss 1 extending along the width direction of the bridge B.
The main structure consists of a plurality of cross beams 5 which are placed on the top of the bridge B and are arranged at intervals in the length direction of the bridge B, and a hanging column part 6 which is hung vertically on the tip side and supports the formwork and scaffolding. ing.

The front wheels 2 roll on running rails 8 attached to the bridge surface by rail anchor steel rods 7, and are rotationally driven by a running drive device 9 via a power transmission mechanism 10.

The front small wheel 3 and the rear small wheel 4 are adapted to engage with the inside of the running rail 8, and prevent the work vehicle A from floating up.

Furthermore, the work vehicle A during work is fixed by a wagen anchor steel rod 11.

The main truss 1 is arranged to be located above the main girder C of the cross beam B, and the fixed main truss 1
A and a moving main truss 1B.

The fixed main body truss 1A is integrated by a lower cross beam 12, and is rigidly connected to the cross beam 5 by fixing the lower cross beam 12 to the cross beam 5 via a spacer 13.

The movable main body truss 1B has a small beam 14 attached to its upper part, is attached to the cross beam 5 via a drive/guide device 15, and is movable in the width direction of the cross beam B.

As shown in FIGS. 7 to 9, the driving/guiding device 15 includes a rack 16 and a guide rail 17 attached to the lower surface of the cross beam 5, a gear 18 meshing with the rack 16, and a rolling motion of the guide rail 17. The guide wheel 19 rotates the gear 18 and the wheel 19, and the drive source 20 rotates the gear 18 and the wheel 19. The gear 18, the wheel 19, and the drive source 20 are provided on the side of the beam 14.

The drive source 20 includes an electric motor 21 and a speed reducer 22, and a chain 23 and a sprocket 24 drive a gear 18 and wheels 19 to rotate.

The gear 18 and the wheels 19 are provided as a pair in the direction of movement, and are attached to the support member 25 by a pin at the center so that the load is equally applied to both.

The support member 25 is removably attached to the small beam 14 with bolts and nuts, and can be adjusted to the inclination angle θ (see FIG. 4A) of the main girder of the widening section or the narrowing section.

In addition, spacers 26 for preventing falling are attached to the small beams on both sides of the driving/guiding device 15 in the direction of movement, and by tightening the spacers 26 with bolts and nuts after horizontal movement, the moving body truss 1B
and the cross beam 5 are fixed.

In the case of increasing the interval between the main girders C in the above configuration, the following steps are performed.

(i) As shown in Fig. 4, the running rail 8 placed directly above the main girder C is removed, and the drum 27 is rotated by the running drive device 9 so that one end is attached to the rear end of the rail 8. wire rope 2
8 is wound up and the traveling rail 8 is advanced.

(ii) As shown in FIG. 5, when the rail 8 advances to a predetermined position, the rail anchor steel rod 7 is set.

(iii) The wagen anchor steel rod 11 is released by hydraulic operation of the anchor jack 29.

(iv) The main jack 30 is lowered, the wheels 2 are placed on the running rail 8, and the main truss 1 is moved forward by the traveling drive device 9, while the moving main truss 1B is laterally moved by the drive source 20. Here, the amount of forward movement and the amount of lateral movement are set in advance so that they are proportional so that the moving main body truss 1B runs smoothly on the inclined running rail 8B.

(v) As shown in FIG. 6, when the work vehicle A moves forward to a predetermined position, set the wagon anchor steel rod 11.

(vi) Jack up the main jack 30 and use the anchor jack 29 to tighten the wagon anchor steel rod 1.
1 makes me nervous. Next, pouring work etc. is performed.

Even in the case of reduction, the process is similar except that the lateral movement direction is different.

In addition, although the case where the moving main body truss 1B is provided only on one side is shown above, it is also possible to provide it on both sides.

(Effect of the invention) As described above, according to the present invention, the main truss is divided into a fixed main truss and a movable main truss, the fixed main truss and the cross beam are rigidly connected, and the moving main truss is a rack gear type, a guide rail, a wheel, etc. The drive of
Since it is attached to the cross beam via a guide device and can be moved in the width direction of the bridge, it has the following effects.

Since the moving main truss can be moved forward and laterally at the same time, the moving operation can be carried out quickly.

Since the lateral movement guide device and drive device are integrated into one, the device configuration is simple.
Work becomes easier.

All parts other than the moving main truss were rigidly connected, so
Safe against lateral movement horizontal forces.

[Brief explanation of drawings]

1, 2, and 3 are a side view, a cross-sectional view, a front view, and a fourth
Figures 5 and 6 are schematic process diagrams showing the work steps in order, where A is a plan view, B is a side view, and
8 and 9 are a plan view, a side view, and a cross-sectional view showing the drive/guide device. 1... Main truss, 2, 3, 4... Wheels, 5...
...Horizontal beam, 6...Hanging column part, 7...Rail anchor steel bar, 8...Travel rail, 9...Traveling drive device,
10...Power transmission mechanism, 11...Wagen anchor steel rod, 12...Lower cross beam, 13...Spacer,
14...Small beam, 15...Drive/guide device, 16...
...Rack, 17...Guide rail, 18...Gear,
19... Guide wheel, 20... Drive source, 21... Electric motor, 22... Speed reducer, 23... Chain, 24
...Sprocket, 25...Support member, 26...
Spacer, 27...Drum, 28...Wire rope, 29...Anchor jack, 30...Main jack.

Claims (1)

[Claims] 1. A main truss that has wheels at its lower part and is movable in the length direction of the bridge and is arranged at intervals in the width direction of the bridge, and a main truss that extends along the width direction of the bridge. The construction vehicle has a plurality of cross beams mounted on top of the plurality of main trusses and arranged at intervals in the length direction of the bridge, the main truss being fixed to a fixed main truss and a movable main truss. The fixed main truss and the cross beam are rigidly connected, and the moving main truss is driven and
An erection work vehicle that is attached to a cross beam via a guide device and is movable in the width direction of the bridge. 2. The drive/guidance device is characterized by comprising a rack and a guide rail attached to the lower surface of the cross beam, a gear that meshes easily, a guide wheel that rolls on the guide rail, and a drive source that rotates the gear. An erection work vehicle according to claim 1.