JPH0868198A - Moving type suspended scaffold device - Google Patents

Abstract

PURPOSE: To previously prevent the generation of curve of a truss beam by stretching a wire member between the lower end of a mast member, which is projected from a central part of the lower edge of the truss beam, and both ends of the lower edge of the truss beam. CONSTITUTION: A guide rail 4a provided in each truss beam 4c is respectively suspended by each pair of suspending machines 2, 2, 3, 3 arranged with a space from each other, and a scaffold deck 4 is suspended with the guide rail 4a freely to be moved. At this stage, when the truss beam 4c is about to be curved downward by own weight of the scaffold deck 4 and the load mounted on the deck 4, the wire members 12, 12 stretched between the lower end of a mast member 11, which is projected from a central part of the lower edge of the truss beam 4c, and both ends of the lower edge of the truss beam 4c are tensed, and the curving of each truss member is thereby previously prevented by the tensile force of the wire member 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile suspension scaffolding device for performing maintenance work on elevated structures such as elevated roads and viaducts for railways, and more particularly to a stiffening structure for the scaffolding deck.

[0002]

2. Description of the Related Art A mobile suspension scaffolding device has been generally known as a scaffolding device for performing maintenance work for maintenance and inspection of elevated structures such as elevated roads and viaducts for railways (see Japanese Patent Publication No. 5-54551). ).

The mobile suspension scaffolding device includes a pair of left and right hanger rails fixed to the lower surface side along the longitudinal direction of an elevated structure such as an elevated road, and a plurality of movable hanger rails in the front-rear direction. Each of the suspension machines, a plurality of second suspension machines suspended by each suspension machine, and a guide rail suspended by the pair of left and right second suspension machines so as to be movable relative to each other are the upper edges. By having a plurality of truss beams, it is composed of a scaffolding deck that is movable in the left-right direction orthogonal to the hanger rail. With this mobile suspension scaffolding device, the scaffolding deck suspended below an elevated structure such as an elevated road can move forward, backward, leftward, and rightward so that maintenance work of the elevated structure can be performed in the longitudinal and width directions. ing.

[0004]

By the way, in the above-mentioned mobile suspension scaffolding apparatus according to the prior art, each truss beam of the scaffolding deck on which an operator or equipment for maintenance is placed has a pair of left and right second suspensions near both ends thereof. Since it is suspended by a holding machine, each truss beam may bend and bend downward due to its own weight of the scaffolding deck and the loading load when the entire length is increased,
In such a case, the flatness of the scaffold deck itself may be impaired, workability may be deteriorated, and work safety may be impaired.

However, if each truss beam having a high rigidity, that is, a high height or a thick material is used, the above-mentioned fear is eliminated, but a truss beam having a high rigidity also increases the unit weight. When the total length of each truss beam is extended to expand the working space of the scaffolding deck, the weight of the entire scaffolding deck is significantly increased, and a pair of left and right hanger rails for suspending the scaffolding deck, a lifting machine, a second lifting machine, Alternatively, a new problem occurs in that the strength of these connecting portions is insufficient.

In view of the above, the present invention can extend the total length of each truss beam without using a truss beam having a high rigidity and a large unit weight, and the working space of the scaffolding deck can be increased without a significant increase in weight. It is an object of the present invention to provide a mobile suspension scaffolding device that can be expanded in the longitudinal direction of the.

[0007]

To this end, the present invention has a plurality of truss beams provided with guide rails suspended relative to a pair of suspenders disposed apart from each other. Therefore, in a mobile suspension scaffolding device equipped with a scaffolding deck that is movably suspended together with a guide rail,
The scaffolding deck has a mast member protruding downward from the center of the lower edge of each truss beam, and a wire member stretched between the lower end of this mast member and the lower edge ends of each truss beam. That is the means.

[0008]

In the mobile suspension scaffolding device according to the present invention employing such means, the guide rails attached to the truss beams are respectively suspended by the pair of suspension machines arranged apart from each other. The scaffolding deck is movably suspended along with the guide rails. Here, when each truss beam bends downward and tries to bend due to the weight of the scaffolding deck and the loading load, the lower end of the mast member protruding downward from the center of the lower edge of the truss beam and both ends of the lower edge of the truss beam The tension of the wire member stretched between the truss beam and the portion prevents the bending of each truss beam, and thus the flatness of the scaffolding deck is maintained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the accompanying drawings. FIG. 2 shows the entire structure of a mobile suspension scaffolding device of an embodiment in which a general highway is subjected to maintenance work, and FIG. 3 shows its schematic structure in a skeleton diagram. In FIGS. 2 and 3, reference numeral 1 is a pair of left and right hanger rails suspended below the longitudinal road of an elevated road, which will be described later, and reference numeral 2 is freely movable along a pair of left and right hanger rails 1, 1. A total of three pairs of upper and lower lifting machines, one pair on the left and right and three steps on the front and rear, a reference numeral 3 is a lower lifting machine suspended by each upper lifting machine 2, and a reference numeral 4 is a suspension by these lower building lifting machines 3. The scaffolding decks carried are shown respectively.

As shown in the enlarged view of FIG. 4, the hanger rails 1, 1 have an inverted T-shaped cross-sectional shape in which the rail portions 1b, 1b project in the left-right direction from the lower end of a support portion 1a extending in the vertical direction. Having, the rail portion 1b, 1b
Rack teeth 1c, which are formed in a continuous waveform in a side view, are attached to the lower surface of the above along the longitudinal direction thereof. Brackets 1d for bolting the vise member 5 are welded and fixed to the upper portion of the support portion 1a at predetermined intervals along the longitudinal direction, and the vise members are bolted to the brackets 1d. 5 is a bridge B on the left and right of the elevated road A
The pair of left and right hanger rails 1 and 1 are suspended substantially horizontally along the longitudinal direction of the elevated road A by sandwiching the ribs C extending outwardly from the left and right.

Further, in the upper stage lifting machine 2, four front and rear left and right flanged wheels 2b rotatably supported in a box-shaped casing 2a include rail portions 1 of the hanger rail 1.
It can be moved along the hanger rail 1 by rolling on b and 1b, and the left and right flanged wheels 2
The flange portions 2c, 2c of b, 2b sandwich the rail portions 1b, 1b of the hanger rail 1 to prevent wheel removal. A connecting pin 2d is laterally installed under the casing 2a of the upper stage lifting machine 2, and the connecting pin 2d penetrates a coupling 7 which is rotatably engaged with the upper end of the hanging rod 6 about the vertical axis. Then, it is rotatably suspended around the horizontal axis.

Here, the pair of left and right upper three-stage lifting machines 2 in the front and rear are connected to each other through tie rods 8 and 8, and the left and right pair of front and rear stages are connected to each other via tie rods 9 and 9. Each of the upper-stage lifting machines 2 is configured to move integrally along the hanger rails 1, 1.

At least one of the upper-stage hoisting machines 2 is provided with the hanger rail 1
A pinion wheel 2e meshing with the rack tooth 1c is rotatably supported by a casing 2a via a central shaft 2f thereof, and a driven gear 2g is fixed to the central shaft 2f. Corresponding to this, the pinion gear 2 meshing with the driven gear 2g
A drive handle 2i having h is rotatably supported by the casing 2a. By manually rotating the drive handle 2i, the pinion wheel 2e is decelerated and rotated to roll on the rack teeth 1c. The lifting machine 2 travels along the hanger rail 1. Further, in order to lock such an upper stage lifting machine 2 on the hanger rail 1 and regulate the movement thereof, the casing 2a has a lock pin 1 which engages with rack teeth 1c of the hanger rail 1.
The insertion hole 2j of 0 is formed.

On the other hand, each of the lower stage suspension machines 3 has a structure similar to that of the upper stage suspension machine 2, and the casing 3a, the flanged wheel 2b, the casing 3a corresponding to the connecting pin 2d, and the flanged wheel 3b. , A connecting pin 3d, and the connecting pin 3d penetrates the lower end of the suspension rod 6 and is connected thereto, so that the lower stage suspension machine 3 is suspended in an upside-down direction opposite to the upper stage suspension machine 2. The rod 6 is rotatably suspended around the horizontal axis.

Here, at least one of the lower suspensions 3 of the lower suspensions 3 has at least one lower suspension 3 having the pinion wheel 2e, the central shaft 2f, the driven gear 2g, the pinion gear 2h, the drive handle 2i and the insertion hole 2j. 3 pinion wheels corresponding to
e, central shaft, driven gear, pinion gear, drive handle,
It has an insertion hole 3j (not shown).

On the other hand, the scaffold deck 4 has a guide rail 4a at its upper edge and a pipe member 4b at its lower edge, and a height 3 extending in a direction orthogonal to the hanger rails 1, 1.
Along the longitudinal direction of the truss beams 4c, 4c, 4c by being hooked between the three truss beams 4c, 4c, 4c of about 0 cm and the pipe members 4b, 4b via the hooks 4d, 4d at both ends. It has a large number of scaffolding plates 4e that can be spread (see FIG. 5). The scaffolding deck 4 is set to have a total width along the longitudinal direction of the truss beam 4c corresponding to the total width of the elevated road A, which is a target of the maintenance work, for example, about 12 m.

Here, the guide rails 4a, 4a, 4a constituting the upper edge of each truss beam 4c are the lower stage lifting machine 3 described above.
Corresponding to, the rail portions 4g, 4g have a T-shaped cross-sectional shape protruding in the left-right direction from the upper end of the support portion 4f extending in the vertical direction, and the rail portions 4g, 4g are continuous to the upper surface in a side view. The rack teeth 4h formed in a wave shape are attached along the longitudinal direction. Each of the guide rails 4a, 4a, 4a as described above has a rail portion 4
The lower surfaces of g and 4g ride on the respective flanged wheels 3b of the lower stage lifting machine 3 and are suspended by the left and right lower stage lifting machines 3 with the rack teeth 4h meshing with the pinion wheels 3e. Cage, drive handle for lower stage lifting machine 3 (not shown)
Is manually rotated, the pinion wheel 3e is decelerated and rotated to feed the rack teeth 4h, so that the guide rails 4a, 4a, 4a move together with the scaffolding deck 4 in the longitudinal direction (the hanger rails 1, 1 Relative to the width of the elevated road A, which is orthogonal to.

As shown in FIG. 1, the mast member 11 is fixed to the central portion in the longitudinal direction of the pipe member 4b forming the lower edge of each truss beam 4c, 4c, 4c by an appropriate means such as welding. And is projected downward, and a pulley 11a is attached to the lower end thereof. Also, the above pipe material 4b
One end of the wire member 12 is connected and fixed to one end of the pipe member 4 by an appropriate means, and the other end of the pipe member 4b is connected to the wire member 12
A worm-type winding reel 13 for winding up the other end of the is fixed. Then, the other end of the wire member 12 wound around the pulley 11a is wound and fixed by the winding reel 13, so that the wire member 12 is stretched between the lower end of the mast member 11 and both ends of the pipe member 4b. ing.

Next, the operation of the mobile suspension scaffolding device of this embodiment constructed as described above will be described. As shown in FIGS. 1 and 2, the mobile suspension scaffolding device of the present embodiment is
The hanger rails 1 and 1 are suspended along the longitudinal direction below the elevated road A which is the target of maintenance work, and are respectively suspended on the respective upper stage suspension machines 2 which are movable along the hanger rails 1 and 1. Each lower-stage lifting machine 3 is suspended via a rod 6, and the guide rails 4a constituting the upper edge of each truss beam 4c of the scaffolding deck 4 are connected to the lower hanger rails 1 and 1 on the lower-stage lifting machine 3 as described above. The scaffolding deck 4 is suspended in the directions orthogonal to each other so that the scaffolding deck 4 is suspended below the elevated road A in the longitudinal direction and the width direction thereof.

Here, on the scaffolding board 4e of the scaffolding deck 4, a plurality of workers for carrying out maintenance work on the elevated road A, working equipment and the like are placed. Since the beam 4c is suspended by the pair of left and right lower stage lifting machines 3 and 3 which are arranged so as to be largely separated from each other, the beam 4c tends to bend and bend downward due to its own weight and the weight of the operator and the working equipment. . However, at that time, the pulley 11a at the lower end portion of the mast member 11 protruding downward from the central portion of the lower edge of each truss beam 4c presses the wire member 12 downward and tensions it. As a result, the downward bending of each truss beam 4c is prevented. Therefore, the scaffolding deck 4 has a large number of scaffolding boards 4e spread over it.
Is maintained in a flat state, so that the maintenance work on the scaffolding plate 4e can be performed safely and efficiently.

As described above, in this embodiment, although the truss beam 4c having a unit weight and a height of about 30 cm is used, each truss beam 4c is prevented from being bent downward. Scaffolding deck 4 even if its full length is extended
Since the flatness is maintained, the working space of the scaffolding deck 4 can be expanded in the longitudinal direction of the truss beam 4c without a significant increase in weight.

Incidentally, the mast member 1 in the present embodiment.
The pulley 11a at the lower end of 1 is not necessarily required, and may be a ring member fixed to the lower end of the mast member 11 to insert the wire member 12, or an insertion hole formed at the lower end of the mast member 11. It can be replaced.

[0023]

As described above, in the present invention, the scaffolding deck is guided by the guide rails attached to the respective truss beams being suspended by the pair of suspending machines which are spaced apart from each other. Suspended together with it.
If each truss beam bends and bends downward due to the weight of the scaffolding deck and the load placed on it, the lower end of the mast member protruding downward from the center of the lower edge of the truss and both ends of the lower edge of the truss The wire stretched between the tension and the tension makes it possible to prevent the bending of each truss beam by the tension and maintain the flatness of the scaffolding deck.

Therefore, according to the present invention, the total length of each truss beam can be extended without using a truss beam having a large rigidity and a large unit weight, and the working space of the scaffolding deck can be provided without a significant increase in weight. It can be extended in the longitudinal direction of the truss beam.

[Brief description of drawings]

FIG. 1 is a front view showing a main part structure of an embodiment of a mobile suspension scaffolding device according to the present invention.

FIG. 2 is a lower perspective view showing the overall structure of one embodiment.

FIG. 3 is a skeleton perspective view showing an overall schematic structure of one embodiment.

FIG. 4 is a partially enlarged front view showing part IV of FIG. 2 as a partial cross section.

FIG. 5 is a partial perspective view of a scaffolding board according to an embodiment.

[Explanation of symbols]

 1 Hanger rail 1a Support part 1b Rail part 1c Rack tooth 1d Locking hole 2 Upper stage lifting machine 2a Casing 2b Wheel with flange 2c Flange part 2d Connecting pin 2e Pinion wheel 2f Center shaft 2g Driven gear 2h Pinion gear 2i Drive handle 2j insertion hole 3 Lower stage lifting machine 3a Casing 3b Wheel with flange 3d Connecting pin 3e Pinion wheel 3e 3j Insertion hole 4 Scaffolding deck 4a Guide rail 4b Pipe material 4c Truss beam 4d Hook 4e Scaffolding board 4f Support part 4g Rail part 4h Rack tooth force 50,000 Member 6 Suspending rod 7 Coupling 8 Tie rod 9 Tie rod 10 Lock pin 11 Mast member 11a Pulley 12 Wire member 13 Winding reel

Claims (1)

[Claims] 1. A plurality of truss beams provided with guide rails that are movably suspended relative to a pair of suspension machines that are spaced apart from each other, so that they are suspended movably together with the guide rails. In the mobile fishing scaffolding device provided with a scaffolding deck, the scaffolding deck comprises a mast member protruding downward from the central portion of the lower edge of each truss beam, a lower end portion of this mast member, and lower edge end portions of each truss beam. And a wire member stretched between the two.