JPH0554551B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Applications] The present invention relates to a mobile scaffolding device, and more specifically, it is used for repairing and painting bridges, the underside of elevated roads, large buildings such as gymnasiums, etc. This invention relates to a mobile scaffolding device suitable for maintenance work.

[Conventional technology] Scaffolding is required for maintenance work on structures such as bridges, and in relatively low places on land, it is possible to use aerial work vehicles or pipe scaffolding assembled from the ground. Although this problem can be solved, for bridges with a height of several tens of meters above the ground, normal scaffolding equipment will not work and a scaffolding equipment attached to the bridge will be required.

In response to this need, various types of mobile scaffolding devices have been proposed for bridges that are extremely high above the ground.

However, in places where the width of the beam changes, such as the inflow point or outflow point of an expressway, the width dimensions of the beams also change, making it impossible to move the scaffolding equipment and requiring maintenance work to cover all of the long beams. The problem of not being able to do so remains.

Patent No. 1 is proposed to solve these problems.
No. 1222171 (Japanese Patent Publication No. 58-57564) can be cited as prior art.

According to this prior art, the scaffolding device can be moved along the length of the bridge, allowing continuous maintenance work and responding to changes in bridge width.

[Problems to be Solved by the Invention] As mentioned above, the mobile scaffolding device has a limit to the width changes that it can accommodate, and when used for general bridge work, it is difficult to use it for bridges where there are few objects and the width changes are small. It can only be used.

Furthermore, if the bridge is supported obliquely to the bridge, it may not be possible to perform actual work on the illustrated grid line area shown in FIG.

Furthermore, if there is a change in the height direction when the scaffolding device is bent on a bridge like a rampway, the scaffolding device cannot be moved smoothly.

[Means for solving the problem] Therefore, this invention solves the problem of changing the width of a bridge, etc.
Furthermore, the aim is to enable the mobile scaffolding device to function over the entire area, including curved bridges and bridges with diagonal intersections with piers.
A hanger rail installed along the structure,
A movable lifting machine equipped on this hanger rail,
In a mobile scaffolding device including a work scaffold suspended by this movable lifting machine, a second lifting machine is connected to the movable lifting machine so as to be able to rotate along a horizontal plane; A beam supported by a second hoist, and a scaffolding board having both ends secured to the beam, and the second hoist is configured to narrow a guide rail section provided on the beam. The beam member is longer than the widthwise interval between the movable hoisting machines, and is movable in a direction intersecting the hanger rail.
The scaffold board has a guide rail portion on its upper side that is held between the rolling wheels, and the length direction of the scaffold board is along the length direction of the structure, and the scaffold board has two parts perpendicular to each other in a plan view.
It is characterized by being configured to be able to move in both directions and in an intermediate direction between the two directions.

[Embodiments] Hereinafter, embodiments of the present invention will be explained with reference to FIGS. 1 to 6 attached hereto. First of all, Fig. 1 is a slope view seen from below of a bridge on which the mobile scaffolding device of the present invention has been erected, in which reference numeral 1 indicates the deck slab forming the road, and reference numeral 2 indicates the bridge material. It has ribs 2A extending in the left-right (width) direction.

A hanger rail that guides the movement of the mobile scaffolding device along the length direction of the bridge material 2 is attached to this rib 2A with a vise 12, and this hanger rail 11 has an inverted T-shaped cross section. A wavy hook-shaped tooth 11a is fixed to the lower surface along the length direction.

This hanger rail 11 has a plurality of lifting machines 20.
is mounted in a movable manner. This hoisting machine 20 has a box-shaped casing 21 with wheels 22 mounted on the hanger rail 11 attached through a shaft 22a in the space inside the box-shaped casing 21, and the flange of the wheel 22 is attached to the side edge of the hanger rail 11. It's along. The rack-shaped teeth 11a are provided in the space below the wheel 22.
A pinion wheel 23 that meshes with the hanger rail 1 is attached to the casing 21 by a shaft 23a.
At least one of the longitudinal lifting devices 20 has a crank handle 25 provided on the casing 21 with respect to a gear 24 provided on the shaft 23a of the pinion ring 23. The gears on the shaft 25a mesh with each other so that torque can be transmitted.

A window hole 26 is bored in the side surface of the casing 21 along the width direction of the rack-shaped tooth 11a, and when a lock pin 27 is inserted into this window hole 26, it can be held locked to the rack-shaped tooth 11a. It's summery.

A second lifting device 30 is suspended from the lower end of such a lifting device 20 by a lifting arm 32 via a thrust bearing 31.
suspends a box-shaped casing 33. This casing 33 has a pinion wheel 34 and a nipping roller 35 whose shafts 34a and 35a are connected to the shaft 22.
a, 23a, and 25a, the pinion wheel 34 meshes with the rack-shaped teeth of a guide rail provided on a truss beam as a beam material, which will be described later, and the clamping roller 35 is placed on the lower surface of the guide rail. This constitutes a second lifting machine 30.

This second hoisting machine 30 has its pinion wheel 34 meshing with the rack-shaped teeth 42 of a guide rail 41 with a T-shaped cross section formed on the upper side of the truss beam 40, and from the lower end of the portion of the guide rail 41 corresponding to the wafer 41a. The pinching roller 35 abuts on it and maintains the pinched state between it and the pinion wheel 34 .

The lower sap member 43 of this truss beam 40 is formed of a round pipe, and the end portion of the scaffold board 50 is locked to this lower sap member 43.

A window hole 36 is bored in the side surface of the casing 33, and when a lock pin 37 is inserted into the window hole 36, it can catch the rack-shaped teeth 42 and maintain the locked state.

The hoisting machine 20 and the second hoisting machine 30 as described above are
The lifting machines 20 are arranged at approximately equal intervals along the length direction of the bridge material 2, and the lengthwise lifting machines 20 are connected by tie rods 28. Second lifting machines 30, 30 on both sides
A truss beam 40 is supported between them. This truss beam 4
The length of 0 is longer than the widthwise interval between the hoisting machines 20, 20, so that an overhang part can be formed on the scaffolding deck, which will be described later.

A scaffolding board 51 is installed between the truss beams 40, and approximately semicircular locking hooks 52 provided at both ends are adapted to catch the lower sap material 43,
A flat scaffolding deck 50 is constructed by laying the scaffolding boards 51 together.

At this time, the total length of the truss beam 40 is longer than the interval between the hoisting machines 20, 20 in the left and right width directions, and the scaffolding deck 50 has a portion that protrudes from the width of the bridge material 2 in the width direction, in other words, Overhang part H
is formed. A pipe support 53 is built in the four corners corresponding to the periphery of the scaffolding deck and in the middle part in the length direction, and is used for a two-tiered scaffolding deck suitable for maintenance work on the sides of the bridge material 2.

The truss beam 40 has a structure that can be supplemented, and as shown in FIG.
4 is fixed, and both left and right end surfaces are symmetrical, and a notch 45 is formed on one side edge of the end plate 44 at one end, and a fixing bolt 4 is inserted opposite to this notch 45.
6 has been planted. Furthermore, a receiving plate 47 protruding from the end side surface is fixed to the end plate 44,
A bolt hole 47a is bored in this receiving plate 47, and a pipe-shaped joint 48 protrudes from the end face of the lower sap member 43 so that it can be fitted into the lower sap member 43 of another truss beam 40.

Further, a receiving plate 49 is fixed to the end plate 44 at the other end, the opening direction of which is opposite to that of the opposing notch 45, and which overlaps the receiving plate 47. It is now possible to connect through

Next, the moving operation of the mobile scaffolding device according to the present invention will be explained. First, the hanger rail 11 is suspended along the rib 2A of the bridge material 2 with a vise 12 at appropriate intervals. At this time, the interval in the width direction of the hanger rails 11, 11 does not need to be constant, and is arranged along the shape of the bridge material 2. A truss beam 40 is suspended from the hanger rails 11, 11 via a hoisting machine 20 and a second hoisting machine 30, and a scaffolding board 51 is constructed between the truss beams 40, so that the scaffolding deck 5
0 is configured.

Then, the scaffolding deck 50 is attached to the hanger rail 11.
When moving along the left and right lifting machines 20
By rotating the crank handle 25 provided on one of the pinion wheels 23, the pinion wheel 23 is driven via the gear 24, and the lifting machine 20 is engaged with the rack teeth 23.
By moving, the lifting machine 20 connected by the tie rod 28 moves together, and the scaffolding deck 50 is sent.

During this movement, when the bridge material 2 is drawing a curved line in plan view, or when the width dimension of the bridge material 2 is widening or contracting, the lifting machine 20 in the left and right width direction, Although the interval between the second hoisting machines 30 changes, the change is absorbed by the second hoisting machines 30 moving along the rack-shaped teeth 42 of the guide rail 41, and the scaffolding deck 50 can move.

In particular, when the pier P and the bridge B shown in FIG. 11a), the movement feed is applied only to the hoists 20 on the outside of the curve. The scaffolding deck 50 moves in a direction oblique to its length direction,
It can be brought close to other piers P.

In the illustrated embodiment, the scaffolding board 51 is attached to the intermediate part of the scaffolding deck 50 in the moving direction, but in this embodiment, it is possible to bend the scaffolding board 51 in the middle and change from a flat part to an inclined part. Convenient for movement (or vice versa).

Although one of the lifting machines 20 is shown as having a drive mechanism using a crank handle, it may be any lifting machine.

In the case of round beams, there are no ribs, so the hanger rail is suspended by a chain.

[Effects of the Invention] As is clear from the above description, the following effects can be expected from the mobile scaffolding device of the present invention.

(a) It is not only possible to move along the length of a structure such as a bridge, but also to follow changes in the width of the structure, and it is also possible to move in a curved line when viewed from above.

(b) Since it can also be moved in a direction oblique to the length direction of the structure, it can be moved to any part of the structure and maintenance can be performed.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view of the mobile scaffolding device of the present invention, Fig. 2 is an enlarged sectional view of the part in Fig. 1, Fig. 3 is a partially enlarged slope view of the truss beam, Fig. 4 is a schematic front view of the same, and Fig. 4 is a schematic front view of the same. FIG. 5 is a partially sloped view of the scaffolding deck, FIG. 6 is a sloped view illustrating a working mode, and FIG. 7 is an explanatory view showing a working state by a conventional mobile scaffolding device. 11...Hanger rail, 11a...Rack-shaped teeth,
20... Lifting machine, 21... Casing, 22... Wheels,
22a...shaft, 23...pinion wheel, 23a...shaft, 2
4... Gear, 25... Crank handle, 28... Lock pin, 30... Second lifting machine, 31... Thrust bearing, 32... Lifting arm, 33... Casing,
34...pinion wheel, 35...pinching roller, 34a,
35a... Axis, 40... Truss beam, 41... Guide rail, 42... Rack tooth, 43... Lower sapwood, 50... Scaffolding deck, 51... Scaffolding board, 52... Locking hook, 5
3... Prop.

Claims (1)

[Claims] 1. A mobile scaffolding device comprising a hanger rail attached along a structure, a movable lifting device equipped on the hanger rail, and a work scaffold suspended by the movable lifting device. , a second hoisting machine connected to the movable hoisting machine so as to be able to rotate along a horizontal plane, a beam supported by the second hoisting machine, and a beam with both ends attached to the beam. the second lifting machine has a rolling wheel that clamps a guide rail part provided on the beam material, and is movable in a direction intersecting the hanger rail; is longer than the interval in the width direction between the movable lifting machines, and has a guide rail part on its upper side that is held by the rolling wheels, and the length direction of the scaffold board is along the length direction of the structure,
A mobile scaffolding device characterized in that it is configured to be movable in two directions perpendicular to each other in a plan view and in an intermediate direction between the two directions.