JP3021192B2 - Mobile hanging scaffolding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rack rail type movable hanging scaffolding device used for temporary repair work such as exterior repair and painting in a building such as a building or a bridge girder. Related to assembly.

[0002]

2. Description of the Related Art In recent years, bridges over rivers and seas, elevated roads, railways, and the like have become widespread, and as a result, painting, repairing, and inspection work on the exterior of these structures have become very common. It is coming. In the case of these works, scaffolds for temporary construction are generally installed around the structure, especially when working on the bottom of the bridge girder, gondola type scaffolds cannot be used,
It is necessary to install a scaffold just under the bridge girder. Here, if the pier of the bridge girder is underwater, it is not possible to use the pier or build a scaffold from the ground.Therefore, the scaffold must be suspended below the bridge girder using the bottom of the bridge girder. Absent.

[0003] In the case of this suspended scaffold, the method of assembling materials such as pipe supports, joints, turnbuckles, and scaffold plates requires a huge amount of materials. In addition, when the pier or the ground of the bridge girder cannot be used as described above, the assembling of the scaffold itself and the work of clearing after the work become particularly complicated. In addition, since this type of work is greatly affected by wind, weather, and the like, it is required to work safely in a short period of time, but cannot meet the demand.

In order to construct such a suspended scaffold quickly and robustly with a small amount of material, the present applicant has proposed a rack rail type movable suspended scaffolding apparatus. Therefore, it is expected that a scaffold at a difficult work site can be easily configured by improving the movable hanging scaffolding apparatus so as to be adapted to various construction work situations.

Conventionally, with respect to the above-mentioned movable hanging scaffold device,
For example, there is a prior art disclosed in Japanese Patent Application Laid-Open No. 1-287364. Here, for example, a movable floor on which an operator rides is assembled on the ground and lifted below a bridge girder by a winch or lifted by a riff truck. Alternatively, a temporary scaffold for workers will be installed under the bridge girder at the pier. Then, workers on these moving floors and temporary scaffolds attach rack rails in the longitudinal direction of the lower part of the bridge girder, attach sliding hangers to the rack rails at predetermined intervals, and attach other hangers in the width direction of the lower part of this hanger. And truss beams are assembled via rack rails. In this way, the truss beams are suspended horizontally below the bridge girder and provided so as to be movable vertically and horizontally by operating two types of hangers. And the workbench is attached to the lower part of the truss beam so that it can move along the truss beam and move up and down,
It is shown to constitute a scaffold that can move three-dimensionally.

[0006]

In the above-mentioned prior art, it is assumed that a moving floor on which an operator rides is lifted from the ground to the lower part of the bridge girder, or that a temporary scaffold is provided using a pier. Therefore, in the case of a bridge over a river or the like, a bridge girder that cannot use a pier cannot be applied. Further, the prior art is directed to the construction of a large-scale bridge girder, and if it is similarly applied to the construction of a small-scale bridge girder, it is not preferable because it is wasteful.

[0007] The present invention has been made in view of the above point, and an object of the present invention is to quickly and easily construct a working scaffold under a bridge girder by utilizing a mechanism of a rack rail type movable hanging scaffold. .

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an elongated work floor which is constructed by attaching rack rails to truss frames on both right and left sides of a scaffold plate in parallel, and the rack rails. Drive and driven hangers that are mounted at the intermediate position of the moving floor, and a connecting rod that holds both hangers in an open state, and the ends of the wires are connected to the drive and driven hangers. A crane that is inserted from the side of the bridge girder in a suspended state with the moving floor suspended, and moves directly on the moving girder as necessary, and the crane below the bridge girder when the moving floor advances below the girder A hanging bracket of a predetermined length, which is sequentially attached at a predetermined interval from the front to the back, and connected to the hanging bracket by an upper vice, and a lower driven hanger is mounted on a rack rail of the moving floor and moved. Hanging the floor Movably supported in a state, in which and a moving suspension means constituting the scaffold and to lock the moving bed to a predetermined position below the bridge girder.

[0009]

According to the above structure, a connecting rod is interposed between a driving hanger and a hanger for driving a slender working floor, and a wire connected to these hangers is hung on a crane to stabilize the moving floor. By suspending the movable hanger horizontally and driving the driving hanger in this suspended state, the movable floor can be moved relative to the hanger on the fixed side. Therefore, the moving floor is suspended by a crane at a predetermined height on the side of the bridge girder at a substantially right angle, and in this state, a hanging bracket is sequentially attached from the front of the bridge girder to the back, below the bridge girder, and the hanger is attached. The moving hanging means is connected between the rack rails of the moving floor and the moving floor, and thereafter, the driving hanger is driven to advance the moving floor by a predetermined amount, which is repeated several times, so that the hanging bracket is provided over the entire area in the width direction below the bridge girder. And the moving floor is suspended and supported in parallel by the moving suspending means, so that the scaffold is rigidly constructed in a short time. In the case of clearing, by performing the operation in the reverse order of the assembling, the moving floor and the like can be removed from the bridge girder in a short time.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. Referring to FIG. 1, the overall configuration of a rack rail type movable hanging scaffolding device will be described. Reference numeral 1 denotes a bridge girder of a small bridge hanging over a river or the like, for example, a tow truck 6 having a crane 5 on the bridge girder 1 or the like. Is arranged. Reference numeral 10 denotes a moving floor that is assembled in advance.
Numeral 0 is hung horizontally by hanging a wire 8 on a hook 7 provided at the tip of the crane 5 of the tow truck 6 so as to be able to move up and down. Then, at the time of assembling the scaffold, the moving floor 10 is inserted from below the bridge girder 1 by operating the crane 5.

Referring to FIGS. 1 and 2, the movable floor 10 will be described. The movable floor 10 has truss frames 11 erected in parallel on the left and right sides at predetermined intervals for easy operation. A scaffold plate 12 is laid between the two truss frames 11, and a handrail frame 13 is erected at a predetermined height at the rear end of the truss frame 11, and is formed in an elongated rectangle slightly larger than the width of the bridge girder 1. A rack rail 14 is attached to the entire length of the upper surface of the left and right truss frames 11, and a driving hanger 20 and a driven hanger 30 are respectively mounted at two intermediate positions of the rack rail 14. Left and right hanger 2
0 and 30 are connected by a connecting rod 15 so as to move together. The ends of the wires 8 extending in four directions from the hooks 7 of the crane 5 are connected to the fittings 16 of the hangers 20, 30.
And the driving hanger 20 and the driven hanger 30
A connection rod 17 is provided between the hangers 20 and 30 so as to temporarily keep the space between the hangers 20 and 30 open.

In this manner, four hangers 20 and 30 are fixedly mounted in a pyramid shape by the wires 8 and the connecting rods 15 and 17 under the hooks 7.
Thereby, the movable floor 10 is stably suspended in a horizontal state. The four hangers 20, 30 fixed in the pyramid shape restrict the movement of the hangers 20, 30 when the driving hangers 20 are driven in the suspended state, so that the movable floor 10 can be moved horizontally. It is possible to move to.

On the other hand, since various beam members 2 are provided on the bottom surface 1a of the bridge girder 1, the beam girder 2 is placed below the bridge girder 2 at, for example, three places in the width direction of the bridge girder 1 according to the height of the worker. The hanging bracket 40 having a length is extended and connected by the clamp means 41. A vice 4 is provided on one of the support members 46.
7 has a moving suspension means 45 provided with a driven hanger 30 'on the other side. Then, while the worker A is on the moving floor 10, the moving hanging means 45 is vertically fixed to the hanging fitting 40 by means of a vice 47, and the driven hanger 30 'is further fixed.
Is mounted on the rack rail 14. In this case, the movable floor 10 is moved forward little by little while sequentially attaching the movable hanging means 45 to the rear hanging bracket 40 and the rack rail 14 from the near side, so that the movable floor 10 is horizontally moved below the bridge girder 1 horizontally. Insert and install. Finally, the wire 8 and the like are removed at a predetermined height below the bridge girder 1, and the movable floor 10 is horizontally suspended and supported by the suspension fittings 40 and the movable suspension means 45 so as to form the scaffold 50. Has become.

Referring to FIG. 3, the rack rail 14, the driving hanger 20, and the driven hanger 30 will be described.
The rack rail 14 is formed by forming a corrugated rack 14b on a T-shaped cross-section rail 14a, and the rack rail 14 is fixed to the truss frame 11 with the rack 14b facing upward. The driving hanger 20 has a case 21 formed to be openable and closable to the left and right. Inside the case 21, a pair of pinching wheels 22 for preventing derailing, and two pinion wheels 23 for driving and braking, 24 are provided. The holding wheel 22 is rotatably mounted on a cantilever shaft 22a on the case side, and is configured to prevent the case 21 from coming off by rolling under the left and right ribs 14c of the rail 14a. .

One of the pinion wheels 23 has a plurality of engaging pins 23b between the left and right disks 23a.
Are arranged in a circle at the same pitch as in the above and are formed in a cage shape, while the pinion wheels 24 are also configured in the same manner. The shaft 23c of one pinion wheel 23 is connected to the motor 25 via a clutch (not shown), and the shaft 24c of the other pinion wheel 24 is connected to the brake 26 via a clutch (not shown). Further, an operation unit 27 for operating the motor 25 and the brake 26 is provided so as to be electrically connected.

The driving hanger 20 contacts the holding wheel 22 under the rib 14c of the rail 14a with the case 21 opened to the left and right of the rack rail 14, and
Pin 23b, 24 of one pinion wheel 23, 24
b is engaged with the rack 14b, and thereafter, the cases 21 are integrally connected to each other so as to close each other, and are mounted on the rack rails 14. When the pinion wheel 23 is rotated to one side by the motor 25, the meshing pin 23b rotates while meshing with the rack 14b. For example, in the case of the case side fixed, the movable floor 10 together with the rack rail 14 always rotates the motor. Move safely in sync.

The driven hanger 30 includes the driving hanger 2
The case 31 has a case 31 which can be separated and opened in the same manner as the case 0, and two pairs of pinching wheels 32 and one pinion wheel 33 are provided inside the case 31. The holding wheel 32 is rotatably attached to a cantilever shaft 32a on the case side. The pinion wheel 33 has a disk 33a provided with a meshing pin 33b. The pinion wheel 33 is rotatably mounted on a shaft 33c on the case side and can be driven. Therefore, the hanger 30 is also mounted on the rack rail 14 in the same manner as for driving. For example, in the case of fixing on the case side, the rack 1 of the rack rail 14 moved by the driving hanger 20
The meshing pin 33b of the pinion wheel 33 rotates while synchronizing and meshing with the pinion 4b to guide and support the movement of the movable floor 10. On the other hand, the rack rail 1
For positioning and fixing to the rack 4, a lock pin 34 is provided so as to be inserted from the hole 31a on the case side and engaged with the rack 14b.

Referring to FIG. 4, the moving suspending means 45 will be described.
It has 0 '. The boss 46a at the lower part of the support member 46
Is the bracket 36 of the tightening screw 35 of the driven hanger 30 '.
Is rotatably connected to. A vice 47 is provided at the upper end of the support member 46 so as to be fixed by tightening a screw 47a with a rib 40a at the lower end of the hanging member 40 interposed therebetween.

Next, the operation of this embodiment will be described with reference to FIG. First, as shown in (a), the wires 8 from the driving hanger 20 and the driven hanger 30 of the moving floor 10 pre-assembled are hung on the hook 7 of the crane 5 of the tow truck 6 and hung horizontally. The worker A gets on the moving floor 10. Then, the elongated moving floor 10 is maintained at a predetermined height in a direction substantially orthogonal to the side of the bridge girder 1,
In addition, the front end of the movable floor 10 is inserted into the lower part of the bridge girder 1, and in this state, the row section 1 b of the bridge girder 1 and the movable floor 10 are supported by the rope 3 to stabilize the movable floor 10.

In this state, the worker A advances to the front end of the movable floor 10 and attaches the hanging bracket 40 to the beam member 2 at the lower part of the bridge girder 1.
To join. Further, the moving hanging means 45 is attached to the lower part of the hanging metal fitting 40, and the driven hanger 30 'is mounted on the tip of the rack rail 14 of the moving floor 10, whereby the moving floor 10 is supported at three points. Stabilize,
And it is guided so that it can move forward. Then, when the driving hanger 20 is driven by removing the rope 3, the hanger 20 on the fixed side is rotated by the meshing rotation of the hanger 20 and the rack rail 14.
Moving floor 10 with rack rails 14 for 0, 30
Moves forward while being guided by the driven hanger 30 ′, and enters the inside of the bridge girder 1 in the width direction.

When the front end of the movable floor 10 reaches the middle position of the bridge girder 1 as shown in FIG. 5B, the driving hanger 20 is stopped. Then, the worker A attaches the hanging bracket 40 to the lower part of the bridge girder 1 and attaches the moving suspending means 45 in the same manner as described above, and attaches the driven hanger 30 ′ to the tip of the rack rail 14. In this case, the moving floor 10
Since the driving and driven hangers 20 and 30 are moved to the rear end of the movable floor 10, the driven hanger 30 is locked to the rack rail 14 by the lock pin 34 to be fixed to the truss frame 11 side, and Disconnecting the connecting rod 17 allows the moving floor 10 to move forward further. In this case, the four hangers 20 and 3 are removed by removing the connecting rod 17.
The fixing of the pyramid shape of 0 is broken, and the driving hanger 20
, The hanger 20 itself moves rearward and cannot move forward on the movable floor 10. Therefore, in this case, the moving floor 10 is directly moved into the bridge girder 1 by the crane 5 via the wire 8 and the driven hanger 30.

When the front end of the movable floor 10 reaches the position behind the bridge girder 1 as shown in FIG. 5C, the movement by the crane 5 is stopped. Then, the worker A attaches the hanging bracket 40 to the lower part of the bridge girder 1 and attaches the moving suspending means 45 in the same manner as described above, and attaches the hanger 30 ′ to the rack rail 14. In this way, the elongated movable floor 10 is suspended and installed in parallel at approximately three points below the bridge girder 1 in the width direction, so that the crane 5, the wire 8, and the work are no longer required. In such a case, the hangers 20, 30 for driving and following the moving floor 10 are removed.

Finally, the movable floor 10 is further moved to an optimum position by human power, and the driven hangers 30 'of the three movable hanging means 45 are locked to the rack rails 14 by the lock pins 34 and positioned, thereby assembling the scaffold. Finish the work. As a result, as shown in FIG. 5D, the movable floor 10 is suspended and supported in parallel by the three hanging brackets 40 and the movable suspending means 45 in the entire width direction below the bridge girder 1, and the scaffold 50 is supported.
Is robustly constructed in a short time.

Then, the worker A can get on the scaffold and safely perform various operations on the bottom of the bridge girder 1.
In this case, the movable floor 10 can be moved back and forth by releasing the lock of the driven hanger 30 ′ as necessary, so that it is possible to always work efficiently at the optimal scaffold position. become.

On the other hand, in the case of clearing after completion of the work, the work is performed in a completely reverse order to that described above. That is, using the hangers 20, 30 for driving and following the crane 5 and the moving floor 10,
The moving floor 10 is pulled out from the back of the bridge girder 1 while sequentially removing the hanging fittings 40 and the moving hanging means 45. As a result, the moving floor 10 and the like are immediately removed from the bridge girder 1, and the scaffold 50 is dismantled in a short time.

Although the embodiment of the present invention has been described above, the driving hanger may be manually operated by a handle.
Although the embodiment in which the movable floor is suspended and supported at three places below the bridge girder has been described, the arrangement and the number of the hanger and the like can be arbitrarily set according to the size and shape of the bridge girder.

[0027]

As described above, according to the present invention,
In a rack rail type moving hanging scaffolding device, the moving floor is hung by a crane using hangers for driving and driving the moving floor, and in this state, the moving floor is connected to the lower part of the bridge girder by a hanging bracket and a moving hanging means. Since the scaffold is constructed while sequentially moving forward, the scaffold can be constructed rapidly under the bridge girder in a short time, especially when there is water under the bridge girder or when a pier or the like cannot be used. In addition, the scaffold can be dismantled by performing the work in the reverse order of assembling the scaffold, so that clearing can be performed in a short time. Therefore, materials and time for temporary construction work can be significantly reduced, and work can be performed quickly and safely.

The structure is simplified because the rack rail on the moving floor and the functions of the driving and driven hangers and the function of the driven hanging hanger and the rack rail of the moving suspension means attached below the bridge girder are used. In addition, the moving floor can be safely moved, and the safety is high. In the case of actual work, the mechanism of the rack rail can be used, and workability is also improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of a movable hanging scaffolding device according to the present invention.

FIG. 2 is a perspective view of a moving floor.

FIG. 3 is a sectional view of a rack rail, a driving hanger, and a driven hanger.

FIG. 4 is a side view showing a partially sectioned moving suspension means.

FIG. 5 is a schematic diagram showing a state of a scaffold assembling operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bridge girder 5 Crane 8 Wire 10 Moving floor 11 Truss frame 12 Scaffolding board 14 Rack rail 17 Connecting rod 20 Driving hanger 30, 30 'Follower hanger 40 Hanging fitting 45 Moving hanging means 50 Scaffold

Claims (3)

(57) [Claims] 1. An elongated work floor which is constructed by attaching rack rails in parallel to truss frames on both left and right sides of a scaffold plate, and a drive which is mounted at an intermediate position between the rack rails and moves the movable floor. A driven hanger, a connecting rod that keeps both hangers open, and a wire girder connected to the driving and driven hangers with the moving floor suspended from the side of the bridge girder. A crane that is inserted below and directly moves the movable floor as required, and a predetermined length that is attached at a predetermined interval from the near side to the lower side of the bridge girder when the movable floor advances below the bridge girder. And the lower hanger is attached to the rack rail of the moving floor, and the movable floor is movably supported in a suspended state and is moved. Floor below bridge girder A movable hanging scaffolding device that locks at a predetermined position to form a scaffold. 2. The moving floor is suspended by a crane, a hanging metal fitting is attached below the bridge girder, and the moving metal means is connected to the hanging metal fitting and a rack rail of the moving floor, and then the driving hanger is driven. 2. The method according to claim 1, further comprising a step of moving forward by a crane by repeatedly moving forward by a predetermined amount to enter a deep inside of the lower part of the bridge girder, fixing a driven hanger of a movable floor at a final position, removing a connecting rod, and removing a connecting rod. Moving hanging scaffolding equipment. 3. The mobile hanging scaffolding device according to claim 1, wherein the moving floor, the hanging metal fittings, and the moving hanging means are removed from the bridge girder in a process in which the scaffold is assembled in a reverse order.