JPH0988331A - Movable suspended scaffolding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the safety of work by pivotally supporting both front and rear end parts in a longitudinally inclined state to truss beams by supporting frames, horizontally laying scaffolding boards pivotally fixed to the supporting frames, and interlocking the scaffolding boards with link members so as to be tiltable at the same angle. SOLUTION: A hanger rail 1 with a lateral pair of rack teeth is laid being inclined upward along the longitudinal direction of a work object construction A so as to suspend a scaffolding deck 4 from the lower face of the work object construction A. Front and rear truss beams 11 of the scaffolding deck 4 are suspended almost vertically, with the front side in a high position and the rear side in a low position, and in proportion to this, a lateral pair of supporting frames 12 are inclined with the front side in a high state. When the tilting operating mechanism 16 is operated to screw in a screw shaft downward, a scaffolding board 13 at the front end is tilted in an almost horizontal state, and a scaffolding board 13 is also tilted in an almost horizontal state interlockingly. A stepped stable working space extended almost along the arch- like curved lower face of the work object construction A can thereby be secured on the scaffolding deck 4.

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 used for maintenance work on various structures such as elevated roads and viaducts, and more specifically, the structure to be worked is curved in an arch shape. The present invention relates to a movable suspension scaffolding device suitable for a case where it is inclined in a straight line.

[0002]

2. Description of the Related Art As a scaffolding device used for maintenance work such as maintenance and inspection of various structures such as elevated roads and viaducts, a mobile suspension scaffolding device as disclosed in Japanese Patent Publication No. 5-54551 has been generally known. There is.

The mobile suspension scaffolding device has a pair of right and left rack toothed hanger rails which are erected along the lower surface of the structure to be worked, and is integrally guided in the front-rear direction by being guided by the rack toothed hanger rails. A group of upper and lower lifting machines that are driven to move freely, a group of lower lifting machines that are suspended by these groups of upper lifting machines, and a group of lower lifting machines that are suspended by these groups of lower lifting machines. It has a pair of front and rear rack toothed guide rails that are integrally movable in the left-right direction intersecting with the rack toothed hanger rails and driven to stop freely, and a pair of front and rear truss beams to which each rack toothed guide rail is fixed. Therefore, the scaffolding deck is configured to be suspended in the front-rear direction along the rack toothed hanger rail and in the left-right direction along the rack toothed guide rail so as to be movable and stopped. And this mobile suspension scaffolding device suspends the scaffolding deck facing the lower surface of the work target structure, and moves it in the front-back direction along the rack toothed hanger rail and in the left-right direction along the rack toothed guide rail. Thus, various maintenance work can be performed on the scaffolding deck for the entire lower surface of the work target structure.

[0004]

By the way, the scaffolding deck has a flat floor structure in which a plurality of scaffolding plates are arranged side by side between a pair of front and rear truss beams. Therefore, when the pair of left and right hanger rails with rack teeth are installed obliquely in conformity with the arch-like shape of the structure to be worked, the floor surface of the scaffolding deck also inclines accordingly. This means that a stable work space cannot be secured on the scaffolding deck, and it is difficult to carry out safe work when the target structure is curved in an arch or inclined in a straight line. There was a problem.

Even with respect to a construction object which is curved in an arch shape or is inclined linearly, the floor surface of the scaffolding deck becomes substantially horizontal if a pair of left and right hanger rails with rack teeth are installed substantially horizontally. And stable work space is secured. However, in this case, as the scaffolding deck moves back and forth along the rack toothed hanger rails, the distance or distance between the floor surface of the scaffolding deck and the work target structure gradually changes, and the height is too low. It becomes too high or too high, and maintenance work for the entire area of the work target structure is practically impossible.

Therefore, the present invention secures a stable work space on the scaffolding deck even when the hanger rail is erected along the work target structure which is curved in an arch shape or is linearly inclined. It is an object of the present invention to provide a mobile suspension scaffolding device that can be used.

[0007]

As a means for achieving this object, the present invention uses at least two left and right hanger rails that are erected along a work target construction as a supporting member.
In a mobile suspension scaffolding device comprising a scaffolding deck movably suspended in the front-rear direction along the hanger rail while facing the work target structure, the scaffolding deck is
At least a pair of left and right support frames that can be tilted in the front-rear direction by pivotally supporting both front and rear ends with respect to the front and rear truss beams that are suspended by the hanger rails and extend in the left-right direction, and the horizontal axes of the support frames, respectively. A plurality of scaffolding plates pivotally attached to be tilted around and horizontally mounted between support frames, and interlockingly configured by link members and tiltable at the same angle, and installed between the truss beam and the scaffolding plate. It has a tilting operation mechanism for performing tilting operation in conjunction with each scaffold plate.

[0008]

The mobile suspension scaffolding device according to the present invention which employs such means has the following features:
The hanger rail is installed substantially horizontally along the work target structure, and for the work target structure that is curved in an arch shape or is inclined in a straight line, the hanger rail is arched along the lower surface of the work target structure or Install with a straight line.

Here, when the hanger rail is erected in an arch shape along the work target structure, the scaffolding deck, which is suspended facing the lower surface of the work target structure using the hanger rail as a support member, is a front and rear. The pair of left and right support frames incline due to the height difference of the truss beams. That is, the pair of left and right support frames inclines substantially along the hanger rail, thereby inclining substantially along the arch shape of the work target structure.

In the scaffolding deck suspended in this manner, the scaffolding boards are interlocked and tilted by the operation of the tilting operation mechanism, and the scaffolding boards are held in a substantially horizontal state. By doing so, a step-like stable work space is secured on the scaffolding deck along the arch shape of the work target structure.

As the scaffolding deck moves along the hanger rail, the tilt angles of the pair of left and right support frames also change. Therefore, each time the scaffolding deck is moved along the hanger rail by a predetermined amount, the tilting operation mechanism is changed. To hold each scaffolding plate in a substantially horizontal state.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be specifically described below with reference to the accompanying drawings. 1 and 2 showing the overall structure of the mobile suspension scaffolding device of one embodiment,
Reference numerals 1 and 1 denote a pair of left and right hanger rails with rack teeth installed along the longitudinal direction of the work target structure A inclined in an arch shape, and reference numerals 2, 2, ... 1, a pair of left and right movable upper and lower suspension units, two front and rear upper suspension units, reference numerals 3, 3, ..., were respectively tiltably connected to the respective upper stage suspension units 2, 2 ,. Each lower stage lifting machine, reference numeral 4 is each of these lower stage lifting machines 3,
3 shows scaffolding decks suspended by 3, ...

Each of the rack toothed hanger rails 1 is
As shown in an enlarged manner in FIG. 3, the support portion 1 extending in the vertical direction.
The rail portions 1b, 1b have a reverse T-shaped cross-sectional shape in which the rail portions 1b, 1b project in the left-right direction from the lower end of a. Rail part 1
Rack teeth 1c formed in a continuous waveform in a side view are provided on the lower surfaces of b and 1b along the longitudinal direction thereof. In such a rack toothed hanger rail 1, a plurality of brackets 5 fixed to the support portion 1a at a predetermined pitch along the longitudinal direction thereof are hung on the work target structure A via appropriate hanging members 6. As a result, the work target structure A is erected in a state of being inclined downward along the lower surface B of the work target structure A by a predetermined amount and substantially along the inclination.

In each of the upper stage lifting machines 2, four front and rear left and right flanged wheels 2b, 2b, which are rotatably supported in a box-shaped casing 2a, have rail portions 1b of the rack toothed hanger rail 1. By rolling on 1b, it is possible to move along the rack toothed hanger rail 1. In this upper stage lifting machine 2, the flange portions 2c, 2c of the left and right flanged wheels 2b, 2b are the rail portion 1 described above.
By facing the both side edges of b and 1b, wheel loss is prevented. In addition, each upper stage lifting machine 2 has a tie rod 7,
It is connected to the front and rear via 7 via a pivotal connection.

Further, at the lower part of the casing 2a of each upper stage lifting machine 2, a connecting pin 2d is provided as a connecting structure with the lower stage lifting machine 3.
Is suspended. A coupling 8 is suspended by the connecting pin 2d so as to be swingable in the front-rear direction, and an upper end portion of a suspension rod 9 is connected to the coupling 8 so as to be rotatable about its axis.

Of the above-mentioned upper stage lifting machines 2, 2, ...
A pinion wheel 2e that meshes with the rack teeth 1c of the rack toothed hanger rail 1 is rotatably supported by the casing 2a via the central shaft 2f of the at least one upper stage lifting machine 2. A driven gear 2g is attached to the central shaft 2f.
Is fixed, and a drive handle 2i having a pinion gear 2h meshing with it is rotatably supported by the casing 2a. Then, by manually rotating the drive handle 2i, the pinion wheels 2e are decelerated and rotated to roll on the rack teeth 1c, and thus the upper stage lifting machine 2 travels along the rack toothed hanger rails 1. It has become. Further, in order to lock such an upper stage lifting machine 2 on the rack toothed hanger rail 1 and regulate the movement thereof, the casing 2a has a lock pin 10 which engages with the rack tooth 1c of the rack toothed hanger rail 1. Through hole 2j is formed.

On the other hand, each of the lower stage lifting machines 3 has a structure similar to that of the upper stage lifting machine 2, and a casing 3 corresponding to the casing 2a, the flanged wheel 2b, and the connecting pin 2d.
a, a wheel with flange 3b, and a connecting pin 3d. The connecting pin 3d penetrates the lower end of the suspension rod 9 and is connected to the lower end of the suspension rod 9, so that the lower stage suspension machine 3 swings in the left-right direction with respect to the upper stage suspension machine 2 in the opposite direction. Suspended freely.

At least one lower lifting device 3 among the lower lifting devices 3, 3, ... Such has a pinion wheel 2e of the upper lifting device 2, a central shaft 2f, a driven gear 2g, and a pinion gear. 2h, a drive handle 2i, and a pinion wheel 3e respectively corresponding to the insertion hole 2j, a central shaft, a driven gear, a pinion gear, a drive handle, and an insertion hole 3j (partly not shown).

The scaffolding deck 4 is suspended by a pair of left and right lower suspensions 3 and 3, respectively, and a pair of front and rear truss beams 11, which are movable in the left and right direction substantially orthogonal to the rack toothed hanger rails 1 and 1, Have 11. Figure 3 for one of them
The truss beam 11 has a guide rail 11a with rack teeth at its upper edge and a pipe member 11b at its lower edge.
It is composed of

The rack toothed guide rail 11a has substantially the same structure as the rack toothed hanger rail 1,
The support portion 1a, the rail portions 1b and 1b, the support portion 11c corresponding to the rack tooth 1c, the rail portions 11d and 11d, and the rack tooth 11e are respectively provided. It is installed toward. This rack toothed guide rail 11a has a pair of left and right lower stage lifting machines 3, 3 with lower surfaces of the rail portions 11d, 11d.
Ride on each flanged wheel 3b and rack teeth 11e
Meshes with the pinion wheel 3e of the lower stage lifting machine 3. Therefore, when the drive handle (not shown) of the lower stage lifting machine 3 is manually rotated, the pinion wheels 3e are decelerated and rotated, and the rack teeth 1 are rotated.
By sending 1e to the left and right, front and rear truss beams 1
1, 11 move in the left-right direction (width direction of the work target structure A) substantially orthogonal to the rack toothed hanger rails 1, 1.

Here, the scaffolding deck 4 has a pair of left and right support frames 12, 12 which are bridged between the pipe members 11b, 11b of the front and rear truss beams 11, 11. Each of the support frames 12, 12 has a pipe member 11b, 1 via U-shaped brackets 12a, 12a fixed to the front and rear ends thereof.
It is pivotally attached to 1b and can tilt in the front-back direction.

A plurality of scaffolding plates 13, 13, ... Are horizontally provided between the support frames 12, 12. Each scaffolding board 1
The pivot pins 12b, 12b, ... Are arranged on both ends of the longitudinal direction along the axis passing through the middle portion of the width direction.
The support frames 12 and 12 are pivotally supported around the respective horizontal axes via, and can be tilted without interfering with each other.

Further, the scaffold plates 13, 13, ... Are interlocked via a pair of left and right link members 14, 14 and link members 15, 15 so as to interlock with each other and tilt at the same angle. . That is, each scaffolding board 13, 13, ...
A pair of left and right brackets 13a, 13a, ... Stand upright on the upper surface on the rear side in the width direction, and a pair of left and right brackets 13b, 13 on the lower surface on the front side in the width direction.
b, ... are erected, and a pair of left and right brackets 13
A pair of left and right link members 14, 13a, ...
14 are pivotally connected to each other, and similarly, a pair of left and right brackets 13b, 13b, ... Are also pivotally connected to a corresponding pair of left and right link members 15, 15.

Here, a tilting operation mechanism 16 as shown in FIG. 4 is installed between the scaffolding plate 13 located at the foremost end and the truss beam 11 on the front side. This tilting operation member 16
Is an operation screw shaft 16b that is screwed onto a nut 16a welded and fixed to the upper surface of the pipe material 11b of the truss beam 11 and vertically penetrates through the pipe material 11b, and a connection that is fixed to the lower surface of the scaffold plate 13 and projects forward The main components are a bracket 16c and a tubular joint 16d that connects the tip of the connecting bracket 16c to the lower end of the operating screw shaft 16b.

An operation handle 16e is fixed to the upper end of the operation screw shaft 16b, and a connecting ring groove 1 is provided at the lower end.
6f is formed. On the other hand, the tubular joint 1
A plurality of engaging pins 16g, which are evenly arranged on the circumference and project toward the inner peripheral side, are provided at the upper end of 6d, and a slit groove 16h is formed at the lower end. And this joint 16
d shows the plurality of engaging pins 16g and the ring groove 16f.
Is engaged with the lower end of the operation screw shaft 16b so as to be relatively rotatable, and the tip of the connecting bracket 16c facing the inner peripheral side through the slit groove 16h is vertically moved via the pivot pin 16i. Is swingably connected to.

Next, the operation of the mobile suspension scaffolding device of one embodiment configured as described above will be described. In the mobile suspension scaffolding device of one embodiment, a pair of left and right rack toothed hanger rails 1, 1 are erected along the longitudinal direction of a work target structure A that is inclined in an arch shape, so that the scaffolding deck 4 forms a group. It is suspended facing the lower surface B of the work target construction A via the upper stage suspension machines 2, 2, ... And the lower stage suspension machines 3, 3 ,. In this case, the rack toothed hanger rails 1 and 1 are installed so as to be inclined upward, so that the truss beams 11 and 11 in front of and behind the scaffolding deck 4 are substantially vertically suspended at a position where the front is high and the rear is low. In response to this, the pair of left and right support frames 12 and 12 are inclined so that the front is high. In addition, in order to lock the upper stage lifting machine 2 to the rack toothed hanger rail 1 and to lock the lower stage lifting machine 3 to the rack toothed guide rail 11a, the insertion hole 2 of the upper stage lifting machine 2
j and the insertion holes 3j of the lower stage lifting machine 3 are inserted with the lock pins 10 respectively.

In the scaffolding deck 4 suspended in the inclined posture as described above, the scaffold plates 13, 13, ... Are interlocked and held in a substantially horizontal state by the operation of the tilting operation mechanism 16. That is, the operation handle 16e of the tilting operation mechanism 16 is operated to screw the operation screw shaft 16b downward by a predetermined amount. Then, the scaffolding plate 13 at the front end is connected to the pair of left and right support frames 12 via the joint 16d and the connecting bracket 16c.
12 are tilted in a substantially horizontal state, and in conjunction with this, the scaffold plates 13, 13, ... Also tilt in a substantially horizontal state.

In this way, a stable step-like work space is secured on the scaffolding deck 4 substantially along the arch-shaped curved lower surface B of the work object structure A. Therefore, various maintenance work is performed on the arch-shaped curved lower surface B of the work target structure A from the stable step-like work space.

In such maintenance work, the scaffolding deck 4 is moved in the width direction of the work target structure A by manually rotating the drive handle (not shown) of the lower stage lifting machine 3, and the scaffolding deck 4 of the upper stage lifting machine 2 is moved. By manually rotating the drive handle 2i, the drive handle 2i moves along the longitudinal direction of the work target structure A, so that various maintenance work can be reliably performed over the entire lower surface B of the work target structure A.

When the scaffolding deck 4 advances along the rack toothed hanger rails 1, 1 in the longitudinal direction of the work target structure A, the inclination angles of the pair of left and right support frames 12, 12 also change, so the scaffolding deck 4 Is moved forward along the rack toothed hanger rails 1, 1 by a predetermined amount, the tilting operation mechanism 16 is operated each time the scaffold plates 13, 13,
... is held in a substantially horizontal state.

Incidentally, the tilting operation mechanism 1 in this embodiment.
6 is not limited to this, and a pantograph type jack device or the like can be used instead.

[0032]

As described above, according to the present invention, when the hanger rail is curved along the work target structure in an arch shape or is installed so as to be linearly inclined, the scaffolding deck is attached to the work target structure. It is suspended in a tilted posture along with it, and by operating the tilting operation member to hold each scaffold plate in a substantially horizontal state, it is possible to secure a step-like stable working space on the scaffold deck along the target construction. Therefore, safe and reliable work can be performed on the scaffolding deck.

[Brief description of drawings]

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

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

FIG. 3 is a partially enlarged front view showing a part III of FIG. 2 as a partial cross section.

FIG. 4 is an enlarged side sectional view showing a tilting operation mechanism according to an embodiment.

[Explanation of symbols]

 1 Rack Toothed Hanger Rail 2 Upper Lifting Machine 3 Lower Lifting Machine 4 Scaffolding Deck 5 Bracket 6 Suspending Member 7 Tie Rod 8 Coupling 9 Suspending Rod 10 Lock Pin 11 Truss Beam 12 Support Frame 13 Scaffolding Board 14 Link Member 15 Link member 16 Tilt operation mechanism

Claims (1)

[Claims] 1. A hanger rail having at least two left and right rails that are erected along a work target structure is used as a supporting member and is movably suspended in the front-rear direction along the hanger rail while facing the work target structure. In a mobile suspension scaffolding device equipped with a scaffolding deck, the scaffolding deck is tilted in the front-rear direction by pivotally supporting both front and rear ends with front and rear truss beams suspended in the hanger rail and extending in the left-right direction. At least a pair of left and right support frames that are possible, and a plurality of pivotally attached to the support frames so as to be tiltable about a horizontal axis, bridged between the support frames, and interlockingly constituted by link members and tiltable at the same angle. A mobile suspension comprising: a scaffolding board and a tilting operation mechanism installed between the truss beam and the scaffolding board to tilt and operate each scaffolding board in conjunction with each other. Scaffolding equipment.