JPS5841106A - Moving of platform for truss bridge inspecting work - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] This invention provides a storage area for materials, equipment, etc. when performing inspection, painting, or other work on a truss bridge. This relates to a method of relocating to another adjacent work section.

Work such as inspection and painting of the truss bridge in Daisnozen takes place from 5 to 10 days.
This work must be carried out every year, and a work walkway may be provided at the bottom of the truss bridge deck for this inspection and painting work. This can only be done in a limited area. In addition, since truss structure bridges have complex shapes, there is no suitable scaffolding for inspecting the inside of the truss, painting, etc., and if fixed scaffolding is assembled along the entire length of the truss bridge, it will be beautiful It is inefficient because it costs a lot of money and also takes a considerable amount of time to assemble and dismantle.

As a countermeasure for this, in the working section of the truss assembly of a truss bridge, the scaffold that is moved up and down in a hoisting manner is suspended from a moving device that is movably installed on the girder, and the scaffold is moved by the moving device into the working section. It is conceivable that the bridge may be moved in the longitudinal direction and width direction of the bridge to perform inspections, painting, and other work within the work section, and in this case, it is also used as a storage area for materials and equipment, etc. as a passageway within the work section. It is necessary to erect a frame that spans the vertical support frames before and after the work section.

It takes about 7 to 10 days to paint in one work area, and after finishing painting and other work in one work area, the frame etc. can be moved to another work area and used repeatedly. Otherwise, it would be uneconomical, but the question is how to relocate it.

An object of the present invention is to provide a method for relocating a frame for truss bridge inspection work that advantageously solves the above-mentioned problems.

Next, the present invention will be explained in detail using illustrated examples.

In the case of a general truss bridge, a plurality of cross-sectional steel girders extending in the longitudinal direction of the bridge, that is, in the longitudinal direction, are arranged at the bottom of the deck, and one and many longitudinal stiffening frames 5 are arranged in the longitudinal direction. They are arranged at intervals of 7.

In the embodiment of this invention, each of the vertical stiffening frames 5
At the top of the work section divided by
4 are arranged at intervals in the left and right direction, and the trolleys 14
The frame 15 of the trolley 14 is fixed to the movable rail 13, and the wheels 16 of the trolley 14 are placed on the lower 7 flange 17 of the girder 2, and the frame 15 includes a reducer and an electric motor with an electromagnetic brake for driving the wheels 16. A traveling drive device 18 is removably fixed.

Four wheels 20 are mounted on the upper part of the movable frame 19 at intervals in the longitudinal and lateral directions, and are mounted on the lower flange 21 of the movable rail 13. A lower guide roller 22 facing the lower surface of the movable frame 13 is attached, and the upper part of a vertical support shaft 26 is fitted into the center of the movable frame 19 and fixed by a key 24. The center portion of a support beam 25 extending in the lateral direction is fitted so as to be horizontally rotatable, and a worm gear 26 is fitted in a non-rotatable manner to the lower part of the support shaft 26, and the worm gear 26 is fitted to the lower end of the support shaft 23. It is fixed by a screwed nut 27.

A traverse drive device 28 consisting of a speed reducer and an electric motor with an electromagnetic brake is attached to one end of the movable rail 13; a drive sprocket 29 is detachably fixed and rotated by the drive device 28 and is attached to the other end of the movable rail 16. A moving chain 31 is wound around the driven sprocket 60 , and both ends of the chain 610 are connected to the movable frame 19 .

A shaft 34 of a worm 66 is rotatably supported via a bearing by a shaft 32 fixed to the lower center of the support beam 25, and the worm 33 is meshed with the worm gear 26, and a box 62 is attached to the shaft 64. A chain wheel 65 is fixed on the outside of the chain wheel 65, and an endless manual operation chain 66 is wound around the chain wheel 65. It is housed in the Tux 62. In addition, the movable rail 16 is moved by the traveling drive device 18 in the front and rear directions, and the traversing drive device 28
The movable frame 19 is moved laterally by the manual operation chain 36, and the support beams 25 and K are rotated by the chain wheel 35 and the worm gear mechanism.
, 3B are configured.

On the side plate 37 of the long side of the rectangular box-shaped scaffold 4, at a position slightly away from both ends of the side plate 67 toward the center,
Two hoisting units 38 are fixed, and each hoisting unit 68 has a base 39, a reducer 40 fixed to this, an electric motor 41, and a winding drum 56. The middle part of the rope f7 is wound a large number of times on each rope, and the upper end of each rope 7 is connected to both ends of the support beam 25,
Furthermore, a weight 42 is connected to the hanging end of each Roguea,
Further, the middle part of each row f7 is wound around a side pulley 45 detachably attached to the upper part of the base 39 and a central pulley 44 provided at the center of the scaffold 4 in the width direction. The pulley 44 is attached to the scaffold 4 via an inverted V-shaped connecting member 45.

When using a member with high bending rigidity as the connecting member 45 and fixing the lower end of the connecting member 45 to the scaffold 4 in a rigid state, the distance between the connecting points of the two ropes 7 to the support beam 25 is determined by the central pulley. 44, and if a connecting member 45 with low bending rigidity is used, the distance between the connecting points of the two rowers with respect to the support beam 25 is set to be larger than the distance between each side pulley 46. .

The running and stopping of the traveling drive device 18 and the traversing drive device 28 are controlled by a control device (not shown) provided on the scaffold 4 via a cable, or by wireless control on the scaffold 4. When the travel drive device 18 is operated, the movable rail 1
3 travels in the front-rear direction, and when the traverse drive device 28 is operated, the movable frame 19 travels in the left-right direction, and when the chain 36 is further pulled and the chain wheel 65 is rotated, the worm 33 meshing with the worm gear 26 is moved. Since it is rotated, the worm 76 turns horizontally around the worm gear 26, and the support beam 25 to which the box 62 supporting the worm 33 is fixed is also turned horizontally. Furthermore, when the hoisting machines 8 fixed to the scaffolding 4 are operated in the hoisting or hoisting direction in synchronization, the scaffolding 4 is moved upward or downward while maintaining a horizontal state.

It is composed of a relocation frame 6t/-1 constructed over adjacent vertical stiffening frames 5, a wide intermediate section 46, and a narrow front section 47 and a narrow rear section 48 connected to the front and rear ends thereof. At the same time, the outer spacing between adjacent vertical stiffening frames 5 is made longer by an appropriate length, for example, about 2 m, and stoppers 49 and 50 are fixed to the front and rear ends of the pedestal 6 to prevent them from coming off and projecting downward. Furthermore, a handrail 51 is fixed around the mount B, and a front hoist 11 is fixed on both left and right sides of the narrow front section 49, and the front hoist 11 is connected to a base 52 and to this. It has a fixed speed reducer 56, an electric motor 54, and a winding drum 12.

A rear hoisting machine 8 is fixed to both left and right sides of the narrow rear part 48 of the frame 6, and the rear hoisting machine 8 includes a base 57, a reducer 58 fixed to this, an electric motor 59, and a winding drum 9. Further, forward pulleys 5 are provided on both left and right sides of the front end side of the wide intermediate portion 46.
5 is attached, and the front strut horn J is installed as shown in Figure 8.
? 49 is in contact with or close to the front surface of the vertical stiffening frame 5.

If the distance between the front end surface of the wide intermediate portion 46 and the rear surface of the vertical stiffening frame 5 opposing thereto is S, then the distance between the winding drum 12 and the advance pulley 55 is set to be 2S.

When performing inspection or other work on one work section, a pedestal 6 is installed across the vertical stiffening frame 5 on both the front and rear sides of the working section, and a rear stopper 50 is installed on the rear surface of the vertical stiffening frame 5 opposite to this. A pedestal 6 is shifted forward so as to be in contact with or in close proximity to each other, and the pedestal 6 is also used as a storage area for materials and machinery and as a passageway within the work zone.

When inspecting the truss assembly, painting, and other work in one work zone and moving the scaffolding 4 and pedestal 6 forward to the adjacent work zone, first move the scaffolding 4 forward and backward as shown in Figure 9. The supporting beam 25 of the moving device 3B provided in the working section to be relocated, that is, the front working section 1B, is arranged so as to extend in the left-right direction. In the state, the mobile device 6
B is placed near the rear end position, and its moving device 3BK
A weight 4 hanging from both ends of the support beam 25
The middle part of the rope 10 with 2 is wound many times around the winding drum 12 of a hoist 11 fixed on both left and right sides of the front part of the gantry B.

In addition, as shown in FIG. 10, the ropes 7 hanging down from both ends of the support beam 25 of the moving device 3A in the rear work zone 1A, where inspection, painting, and other work have been completed, are hoisted up. After removing it from the winding drum 56 of the machine 68 and horizontally turning the support beam 25 of the moving device 3A by about 90 degrees to make it extend horizontally, move the moving device 6A in the rear working section 1A near the rear end position. The rope 7, which is moved backward until the end of the moving device 3A and is hanging down from both ends of the support beam 25 of the moving device 3A, is wrapped many times around the hoisting machine 80 and the winding drum 9 fixed to both left and right sides of the rear part of the gantry 6. .

Next, as shown in FIG. 11, each hoisting machine 8.11 is operated in the hoisting direction to lift the platform 6 together with the scaffolding 4, and then the moving devices 3A and 3B of each work section IA and IB are moved to the front end position. The hoisting machines 8 and 11 are moved forward to a nearby location, and then the hoisting machines 8 and 11 are operated in the lowering direction to lower the gantry 6 onto the vertical stiffening frames 5 on both front and rear sides of the front work section 1B.

Next, as shown in FIG. 12, the rope 1 of the front hoist 11 is
0 is loosened and wound around the forward pulley 55, and each hoisting machine 8, 11 is operated in the hoisting direction to lift the pedestal 6.
As shown in FIG. 13, the pedestal 6 automatically moves forward by the distance S, and the rear stopper 50 comes into contact with or approaches the rear end surface of the vertical stiffening frame 5 facing it.

Next, each hoisting machine 8, 11 is operated in the lowering direction to lower the gantry 6 onto the vertical stiffening frames 5 on both front and rear sides of the front working section 1B, as shown in FIG. Remove the lower gear in the rear working section 1A from the winding drum 9 of the hoisting machine 8 attached to both left and right sides of the rear, and move the moving device 6B in the front working section 1B backward to above the scaffolding 4. , the support beam 25 of the moving device 6B is about 9
00 The rope 10 is arranged to horizontally rotate and extend in the front-rear direction, and is suspended from both ends of the support beam 25.
After wrapping the middle part of the scaffold 4 many times around the barrel 56 of each hoist 38 fixed to the scaffold 4, each hoist 38 is operated in the hoisting direction to lift the scaffold 4 from the pedestal 6.

After completing the inspection, painting, and other work on the truss assembly in work zone 1B, the scaffolding 4 and trestle were moved to the adjacent work zone 1C.
If relocating to , work section IB.

Using the moving devices 3B and 3C provided in 1C,
Perform the relocation work in the same order of operation as in the previous case. Thereafter, in the same manner, inspection of the work zone, painting and other work, and movement of the scaffolding and pedestal are alternately repeated as many times as necessary.

In the embodiment described above, the manual operation chain 66 is used as a swing drive device for horizontally swinging the support beam 25.
Although a manual swing drive device is used in which the worm 63 is rotated via the chain wheel 65, the worm 63 may be rotated multiple times by an electric motor with a speed reducer. Further, as the moving device installed on the girder in each of the work sections, any structure other than that shown in the drawings may be used as long as it can move the support beam 25 in the front-rear and left-right directions. Furthermore, when using a planar circular or rectangular scaffold, the pivoting means for the support beam may be omitted and the support beam may be fixed to the movable frame.

As in the above embodiment, if the distance between the connecting points of the two row pulleys 10 to the support beam 25 is set larger than the distance between each central pulley 440 or the distance between each side pulley 43, the scaffolding The shaking of the scaffold 4 in the longitudinal direction can be reduced. In addition, if the hoisting machine 38 is installed at a position near the center by a distance corresponding to the distance from the end of the scaffolding, the end of the scaffolding 4 can be connected to the frame 6.
Since it can be positioned below, the lower part of the pedestal in the vertical stiffening frame 5 can be inspected, painted, and other operations can be easily performed.

Each hoisting machine 8.11.38 may have a rope holding roller, or a hoisting machine having two winding drums arranged in parallel may be used, with each winding drum having an intermediate portion of the rope. may be wound alternately. Alternatively, the weight 42 may be omitted and the end of the rope may be detachably fixed or locked to the winding drum.

The trolley 14 includes a lower flange of the girder 2, a side roller facing the side surface of the girder 17, and a lower 7 flange 1 of the trolley 14.
It is preferable to use one having a lower guide roller facing the lower surface of 7. Furthermore, side rollers may be attached to the movable frame 19 to face both sides of the lower flange 210 of the movable rail 16.

According to this invention, the moving device provided in each work section of the truss fat in a truss bridge is supported using the girder 2 of the truss bridge, and the girder 2 is used as a guide rail to move the moving device in the longitudinal direction of the bridge. A frame 6 that is movable and is constructed across the vertical stiffening frame 5 on both front and rear sides of the work section.
After completing inspection, painting, and other work in the work zone by using the storage area for materials and equipment as a passageway within the work zone, move the area provided in the work zone where the work was completed. Wrap the rope hanging from the device around the winding drum 9 of the rear winding machine 8 attached to the rear of the pedestal 6,
And when the work is completed, the rope hanging from the moving device installed in the work section adjacent to the front of the section is transferred to the winding drum 1 of the front hoist 11 attached to the front of the gantry B.
2, and then each hoisting machine 8, 11 lifts the pedestal 6, each moving device moves the pedestal 6 forward, and each hoisting machine 8.11 suspends the pedestal. can be sequentially moved to each work section by simple means and used repeatedly, and one frame 6 can be used for multiple work sections, resulting in economical effects.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a longitudinal sectional front view showing a state in which a movable scaffold and a frame are installed on a truss bridge, Fig. 2 is an enlarged longitudinal sectional front view of a part thereof, and Fig. 6
The figure is an enlarged longitudinal cross-sectional side view of the movable scaffold and pedestal installation part.
The figure is a partially longitudinal front view of the scaffold moving device, Fig. 5 is a partially longitudinal side view thereof, Fig. 6 is a perspective view showing the suspended part of the scaffold, and Fig. 7
The figure is a perspective view showing the pedestal to which the hoist is attached, FIG. 8 is a perspective view showing the rope winding state of the hoist at the front of the pedestal when the pedestal is automatically advanced by lifting, and FIGS. 9 to 14 The figure is a schematic side view showing the order in which the scaffolding and the pedestal are relocated. In the figure, 1A to 1C are work sections, 2 is a girder, and 6A to 6
C is a moving device, 4 is a scaffold, 5 is a vertical stiffening frame, 6 is a pedestal, 7 is a rope, 8 is a rear hoisting machine, 9 is a winding drum, 10 is a rope, 11 is a front hoisting machine, 12 is a A winding drum, 13 a steel movable rail, 14 a trolley, 18 a traveling drive device, 19 a movable frame, 20 a rolling stock, 22 a lower guide rail,
23 is a support shaft, 24 is a key, 25 is a support beam, 26 is a worm gear, 28 is a traverse drive device, 29 is a driving Sugerocket, 60 is a driven Sugerocket, 31 is a moving chain, 33 is a worm, 35 is a Chain wheel, 66 is a chain for manual operation, 68 is a hoist, 42 is a weight, 46 is a side pulley,
44 is a central pulley, 49 and 50 are stoppers for preventing removal, 55 is a forward pulley, and 56 is a winding drum.

Claims (1)

[Claims] In one working section 1A of the truss fat in a truss bridge, the rope 7 suspended from the moving device 6A installed on the girder 2 is extended across the longitudinal stiffening frame 5 on both front and rear sides of the working section 1A. A moving device is wound around the hoisting drum 9 of the rear hoisting machine 8 attached to the rear of the erected frame B, and is movably installed on the girder 2 in the working section 1B adjacent to the front of the working section 1A. The rope 10 suspended from 6B is wound around the winding drum 12 of the front hoist 11 attached to the front part of the gantry B, and then each hoist 8.11 is operated in the hoisting direction. After hoisting the gantry 6, each of the moving devices 3A and 3B is moved forward to move the gantry 6 forward, and then each hoisting machine 8, 11 is operated in the lowering direction to move the gantry 6 to the front work section. A method for relocating a frame for truss bridge inspection work, which is characterized in that it is mounted across vertical stiffening frames 5 on both the front and rear sides of 1B.