JPS5849643B2 - Erection work vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bridge construction vehicle that is capable of changing the spacing between main girders when changing the width of a cross beam.

Conventionally, for example, changing the main girder spacing of construction vehicles in order to change the width of Davidark Bridge during construction has been complicated.

This was due to the structure of the construction vehicle itself, the replacement of reinforcing beams on the construction vehicle, etc.

According to this invention, the main girder and the cross beam of the construction work vehicle are movably attached, and a hydraulic drive device is fixed to the cross beam, and the width of the main girder is changed by pressing or pulling the main girder, It is an object of the present invention to solve the above-mentioned problems by providing an erection work vehicle that allows the front end of the lower surface of the main girder to follow the lateral movement of the main girder to facilitate changing the spacing between the main girders.

The present invention will be explained below with reference to an illustrated embodiment.

Erection work vehicle A consists of main girders 1 and 1' arranged parallel to each other and cross beams 2 and 2' which are slidably supported above the main girders 1 and 1' so as to be perpendicular to each other. Hydraulic cylinders 3, 3' and cross beams 2, 2 arranged at both ends of 2, 2', respectively.
The main structure consists of a hanging pillar part 4 which hangs down from '.

A rear locking mechanism 5 is arranged at the rear end of the main girders 1, 1' of the construction vehicle A to prevent the construction vehicle A from falling forward (see FIG. 1).

The sliding parts 6K of the main girders 1, 1' and the cross beams 2, 2' are connected to a sliding groove 7 formed in the extending direction of the cross beams on the upper surface of the main girders 1, 1'. A supported cross beam sliding surface 8 is formed (see FIG. 2 ayb).

A sliding plate 9 formed of a fluororesin plate is provided in the sliding groove 7.
is fixed, and a stainless steel plate 1 is attached to the sliding surface 8 of the cross beam.
0 is fixed at one end and tensioned at the other end with a tension screw.

For this reason, the cross beams 2, 2' and the main girders 1, 1' have an appropriate amount of play and are supported so as to be able to slide in the lateral direction. Insert, cross beam 2
, 2' are provided with a plurality of fixing bolts 11 for fixing the main girders 1, 1'.

The main girders 1, 1' and the cross beams 2, 2' are connected by the bolts 11.
is usually fixed.

Further, it is sufficient to arrange a material having low frictional resistance and sufficient resistance to the load in the sliding groove 7, and a ball bearing or the like may also be arranged.

The hydraulic cylinders 3, 3' consist of a hydraulic cylinder part and a rond part attached to its 5 drive shaft.

The hydraulic cylinders 3, 3' are fixed to both ends of the cross beams 2, 2', and the rond portions are connected and fixed to the sides of the main girders 1, 1' (see FIG. 3).

The main girders 1, 1' are pushed or pulled laterally by this hydraulic cylinder 3.3'c.

The lower surface of the main girder 1, 1' has a main girder 1 at the front and rear parts.
, 1' on the rail.
2 and a pair of rail clamping rollers 12' are provided, respectively, which are mounted on a mount mounted on a rotary shaft on a vertical axis.

Note that although FIG. 5 shows the middle rear mount 22 of the mount, the mount also has the same structure.

A lateral movement roller 13 is located in front of the front roller 12.
A lateral movement roller 13 is provided with a lateral movement rail 14 suspended from the main beams 1 and 1', on which a lateral movement rail 14 is placed during lateral movement (see FIG. 4).

An upper roller 15 is provided at the rear end of the upper surface of the main girder 1, 1' and projects upward so as to come into contact with the lower end of the cross beam of the rear gate structure 5. A rotatable mount 23K connected to the upper end of the jack 16.
It is provided.

This prevents the rear parts of the main girders 1, 1' from lifting up during the lateral movement of the main girders 1, 1', and also disperses twisting, etc. applied to the upper roller 15 by the mount.

A main jack 17 is provided near each of the rail rolling front rollers 12, and these jacks/jacks 17 can sufficiently lift the front portions of the main girders 1, 1' in the vertical direction.

Furthermore, anchor jacks 18 are provided near the pair of rail holding portion rollers 12' (see FIG. 6).

The hanging column portion 4 is designed to support a hanging frame 19 hanging from the cross beam 2, and is connected to the hanging frame 19 by a connecting member that can be removed while changing the spacing between the main girders 1 and 1'.

When the distance between the main girders 1 and 1' is to be increased during bridge construction using the construction vehicle A having such a configuration, the following procedure may be performed.

(4) Cases where a large amount of width expansion is required at the end of the Taibidark Bridge, which is in the process of being bridged.

■． When lowering the main jack 17 of the main girder 1 and removing the front roller 12 from the rail 20,
It is divided into units.

Further, a rear locking mechanism 5 is installed at the rear ends of the main girders 1 and 1', respectively, and the rear part of the main girder 1 can also be lifted up by lowering the anchor jack 18.

In this state, the seven-part roller 15 is brought into contact with the rear gate structure 5K.

2. A lateral movement rail 14 suspended from the main girder 1 is arranged on the lateral movement roller 13, and the lateral movement port 13 is placed on the lateral movement rail 14 by a main jack 17K.

Next, the rail 20 held by the pair of holding rollers 12' is pulled out, and the mount is rotated laterally and fixed.

At this time, a lateral movement rail 14' is arranged on the roller pair 12', and the roller pair 12' is placed on the lateral movement rail 14' by the anchor jack 18.

At this time, the upper roller 15 is adjusted by the hydraulic jack 16 so that appropriate contact can be obtained.

3. The main girder 1' is moved horizontally to the rail 1 in the same manner as the above operation.
4. Place it on the main girder 1' and fix it to the bridge surface with wired turnbuckles.

The fixing bolts 11 on the main girder 1 side are removed, the hydraulic cylinder 3 is driven in the cylinder/reverse direction, and the main girder 1 is laterally moved outward relative to the main girder 1'.

Next, the main girder 1 that has completed its lateral movement is fixed using the fixing bolts 11K, and then fixed to the bridge using wires and turnbuckles.

Furthermore, the fixing bolts 11 on the main girder 1' side are removed, the wires and turnbuckles are released, and the main girder 1' is laterally moved in the same manner as described above.

Erection vehicle A with the gap between main girders 1 and 1' expanded in this way
Then, it is placed on the newly installed rail 20' (see FIG. 7).

Furthermore, if a large amount of width reduction is required, the above operation may be reversed.

(B) In the case where it is necessary to gradually widen the upper surface of Davydark Bridge, which is in the process of being bridged.

■, Gradually expand and lay the rigid unit type rail 21, run on the rail 21, extend the hydraulic cylinders 3, 3' according to the expansion, and if ← move back the main girder 1,
1' to follow on the rail 21, the main girder spacing is changed.

In this case, since the front rollers 12 and the pair of clamping rollers 12' of the main girders 1, 1' are mounted on rotatable mounts, their tracking is simple.

Furthermore, since the pair of clamping rollers 12' clamps the rail 21, the rear gate structure 5 is not required.

Father, since the fixing bolts 11 were removed during the above-mentioned follow-up, the main girders 1, 1' and the cross beams 2, 2' can slide against each other, and there is some play in the sliding part 6. Therefore, the spacing between the main girders 1 and 1' can be easily changed on the construction vehicle A (No. 8
(see figure).

Further, when the width is to be gradually reduced, the unit rails 21 may be laid in the direction of the reduction.

[Brief Description of the Drawings] Fig. 1 is a plan view of the construction work vehicle according to the present invention, Fig. 2 a
is a side view showing the sliding part, FIG. 2b is a sectional view taken along the line A-A in FIG. 2a, FIG. Figure 5 is a rear view showing the rear gate structure and each roller, Figure 6 is a layout diagram showing the mounting position of the main jack and anchor jack, Figure 7 is a plan view showing the expansion of the main girder spacing of the erection work vehicle, FIG. 8 is a plan view showing a state in which the rail is followed. A... Erection work vehicle, 1, 1'... Main girder, 2, 2'... Cross beam, 3, 3'... Hydraulic cylinder, 4 ... Hanging pillar part, 5 ... Rear gate structure, 6 ... Sliding part, 7 ... Sliding groove,
8...Sliding surface, 9...Sliding plate, 10...
...Stainless steel plate, 11...Fixing bolt,
12... Front roller, 12'... Holding portion a-ra pair, 13... Lateral moving roller, 14, 14
'... Lateral movement rail, 15... Upper roller, 16... Hydraulic jack, 17...
Main jack, 18... Anchor jack,
19... hanging frame, 20, 2o; 21...
・Rail, 22.23...Mount.

Claims (1)

[Claims] 1. Main girders arranged parallel to each other at predetermined intervals and cross beams mounted perpendicularly above the main girders at predetermined intervals are attached to each other in a sliding manner. The transverse beam is provided with a hydraulic drive unit that suppresses or pulls the main girder in the extending direction of the cross beam, and the lower surface of the main girder is provided with a front roller, a rear roller, and a lateral movement roller disposed at the front end. 1. An erection work vehicle, characterized in that a roller is provided at the rear end of the upper surface of the main girder, the roller projecting upward. 2. A sliding plate made of a material with low frictional resistance is removably attached to the contact surface between the main girder and the cross beam that is slidably attached to the L side of the main girder. An erection work vehicle according to claim 1.