JPH09158470A - Prefabricated scaffolding for bridge pier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assemble a scaffolding on which a worker can get on to maintain, inspect and repair a wall surface of a bridge pier independently, slenderly and vertically erected so that it can elevate up and down and to hoist a heavy cargo by a winch. SOLUTION: It is constituted of fixed suspending parts 11, 12 fixed left and right on an upper part of a bridge pier P, pairs of wires 16, 17, 18, 19 suspended from each of the fixed suspending parts 11, 12, a scaffolding part 15 arranged in a square shape to surround the circumference of the bridge pier P and free to vertically move in the height direction of the bridge pier P and winches 61, 62, 63, 64 each pair of which is respectively arranged left and right on the scaffolding part 15 and respectively capable of winding up the wires 16, 17, 18, 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembly scaffold for piers on which an operator can ride in order to maintain, inspect, and repair the wall surface of an independent and vertically standing pier.

[0002]

2. Description of the Related Art An expressway has been constructed for the convenience of transportation, and in order to construct this expressway, the road is erected or elevated to prevent intersection with a conventional road. Also, in urban areas, elevated tracks are increasingly being constructed to promote the three-dimensionalization of railways, and the construction of monorails has also become common. In the construction of such elevated roads and railways, the roads and railways are supported by concrete piers and lifted from the ground and roads to a high position. Most of these piers are made of reinforced concrete with embedded reinforcing bars inside and fixed with concrete. Since highways and elevated railways are constructed avoiding roads and obstacles, the height of highways, railways, and monorail piers tends to increase year by year. For this reason, the height from the ground to the upper part of the pier becomes high, and it has come to be built to a height that cannot be imagined with conventional piers.

Since the durability of the bridge pier constructed in this way deteriorates due to aging, periodic maintenance,
It needs to be inspected and sometimes needs to be repaired. In addition, in recent years, in order to prevent collapse and buckling due to an earthquake, there is an increasing need for repair work to reinforce the piers and enhance the earthquake resistance. This pier reinforcement work encloses a concrete pier for a highway or an elevated railway that has already been built with a steel plate from the root to the top and injects concrete or reinforced resin between the pier and the steel plate to secure it. The construction method is generally used.
In this reinforcement work, iron plates are wrapped around the existing piers without any gaps, and the iron plates are welded together to integrate them, increasing the strength of the piers.

For this reinforcing work, it is necessary to lift an iron plate having a wall thickness of about 1 cm and bring it close to the side surface of the pier to be fixed. Since this reinforcing iron plate is often flat and heavy, it cannot be manually lifted. In addition, since flat iron plates are made close to each other on the side of a flat pier with a narrow gap, even if you try to hoist with a crane, the hooks of the crane are an obstacle and it is difficult to position and weld the iron plate. Met. In this way, the work behind the reinforcement of the piers is special, and it is difficult to work because there are restrictions that must be done at high places.

In the maintenance, inspection, repair and reinforcement work of such a tall bridge pier, the following method has been carried out in order to lift workers and materials to a high position due to its peculiarity. First, there is a method in which scaffolds are assembled from the ground, the scaffolds are sequentially piled up to a higher position, the scaffolds are assembled so as to cover the entire pier, and the scaffolds are used to perform construction work. Assembling a scaffold around a pier in this way is time-consuming and costly to install and remove. Further, in the work such as repair and reinforcement on the pier, the worker has to go up and down to a high place by following the scaffold, which is a burden on the worker and lacks the speed of the whole work.

Therefore, in recent years, aerial work vehicles have been actively used for maintenance, inspection, repair and reinforcement work of bridge piers. In this aerial work vehicle, workers and materials are placed on a platform that moves up and down, and workers and materials are lifted and lowered for each platform to facilitate inspection, maintenance, repair, and reinforcement work on the side of the pier. It is something that can be done.
By using such an aerial work vehicle, the work of assembling and disassembling the scaffold, such as preparation and removal, is eliminated, and the speed of the whole work can be increased. In addition, it is a heavy physical burden for workers to climb up and down the scaffold manually, but if a work platform for aerial work is used, the lifting platform is moved up and down by hydraulic pressure, etc. It does not put a burden on the staff, and has been actively used in various work on piers in recent years.

In conventional aerial work vehicles, it is popular that an X-shaped pantograph elevating mechanism (called a scissors type) is mounted on the upper part of the vehicle body, and a horizontal elevating platform is arranged on the upper surface of the elevating mechanism. Is used for. In an aerial work vehicle with such a structure, the lifting platform can be lifted vertically upward from the vehicle body, and the lifting platform is lifted to a high position along the side of the pier without using a scaffold. You can do it. Further, the lifting platform can be moved up and down along the wall surface of the pier that has been vertically raised, which facilitates the construction, painting, repair, etc. of the wall surface of the pier.

However, when performing work using such an aerial work vehicle, the aerial work vehicle is parked near the pier and the body of the aerial work vehicle is fixed to the ground with an outrigger or the like. There was a characteristic that the boom could not be expanded or contracted without it. Therefore, depending on the conditions under which the piers are installed,
In some cases, such a conventional aerial work vehicle cannot be used. For example, in a pier installed on the sea or in a river, the pier itself is raised from the sea surface or the water surface as it is, and it is not possible to place the work vehicle in close proximity to the pier. In addition, for highways constructed on conventional roads, piers are installed on the conventional roads and aerial work vehicles cannot be parked unless traffic on the conventional roads is blocked. Met. In places with such conditions, it was not possible to use an aerial work vehicle that was convenient for working in high places, and it was necessary to assemble scaffolding and perform inefficient work. .

[0009]

In maintenance, inspection, and repair of tall piers that stand upright independently as described above, their shapes are peculiar, and therefore scaffolding can be assembled like a normal building, In many cases, it was not possible to use an aerial work vehicle. However, due to the rapid demand for maintenance of bridge piers, especially for reinforcement work to reinforce its strength, even if the scaffolding cannot be assembled or the aerial work vehicle cannot be used, It was desired to develop an assembly scaffold that can be used to reinforce the strength of piers.

In recent years, in anticipation of a major earthquake in the city, in order to prevent the pier from falling or being damaged, in the reinforcement work for giving strength to the pier itself, an iron plate is wound around the conventional pier and fixed. Most of the work had to be done. This iron plate had a thickness of a few centimeters, and its weight was extremely heavy. In the work of lifting such an iron plate to the side surface of the pier, joining it with surrounding iron plates by welding etc. at the set position, and assembling so as to cover the entire pier, it is necessary to lift a heavy iron plate. . Even in such a case, it is difficult to pull up the iron plate itself in the assembled scaffolding or the place where the work platform for aerial work cannot be used. It is also possible to lift the iron plate with a crane, but in this case, due to the peculiarity of the crane, the iron plate must be lifted below the boom, and a highway or railway has already been installed. , In a place where the upper space is limited, the iron plate cannot be hoisted by a crane, and only the method of hoisting manually or using a winch can be used. It was a thing. For this reason, roads and railways have already been installed in the upper part such as piers, and even in a special installation place where there is no escape in the upper space, the scaffold can be moved up and down along the side of the pier, It was necessary to develop scaffolds for piers that would allow members to move smoothly to the desired location.

Even for a pier built in the sea or a river, the side wall of the pier can be maintained, inspected and repaired without using a scaffold or an aerial work vehicle, and the strength of the pier can be enhanced. There is a need for an assembly scaffold that facilitates construction work. Moreover, at the same time, a lifting mechanism that can freely move a heavy iron plate up and down, left and right at the place where reinforcement work is performed is required, and it is desired to improve work efficiency.

[0012]

In order to achieve the above-mentioned object, the invention of claim 1 has a fixed suspension part fixed to the left and right of the upper part of the pier and a pair suspended from each fixed suspension part. Wires and scaffolding parts that are arranged in a square shape surrounding the circumference of the pier and can move up and down in the height direction of the pier, and one pair each on the left and right of the scaffolding part,
Each is characterized by a winch capable of winding a wire.

Further, the invention according to claim 2 is such that the fixed suspension portions fixed to the left and right of the upper portion of the bridge pier, the pair of wires suspended from the respective fixed suspension portions, and the rod so as to surround the periphery of the pier. Scaffolding parts that are arranged in a letter shape and can move up and down in the height direction of the pier, and a pair of winches that can be wound on the left and right sides of the scaffolding part, and a pair of fixed suspensions It is characterized in that it is composed of an auxiliary suspending portion which is bridged to the left and right ends of the portion.

A third aspect of the present invention is the scaffold for scaffolding piers according to the first and second aspects, wherein the fixed suspending portion is provided with a winch for lifting a heavy object.

According to a fourth aspect of the present invention, in the pier assembly scaffolding according to the second aspect, a winch for lifting the auxiliary heavy weight portion is provided.

According to a fifth aspect of the present invention, in the scaffold for scaffolding according to the first and second aspects, the fixed suspension part has a horizontally extending rail body, and a pair of the rail bodies are movable in the longitudinal direction thereof. An upper slider is provided, each upper slider is connected to the upper end of the wire, and the scaffold has a horizontally extending rail body, and this rail body is provided with a pair of lower sliders that can move in the length direction. Is characterized by fixing the winch for winding each wire.

According to a sixth aspect of the present invention, in the scaffold for scaffolding for piers according to the first and second aspects, the pair of upper sliders provided on the fixed suspension portion are moved in the left-right direction, and the pair of lower portions provided on the scaffold portion. It is characterized in that the slider is operated in synchronism with the movement of the slider in the left-right direction, and the wire hung from the fixed suspension part is moved in the left-right direction while keeping the wire vertical.

According to a seventh aspect of the present invention, in the scaffold for scaffolding piers according to the first and second aspects, the fixed suspension part has a horizontally extending rail body, and the winch slider is movable on the rail body in the longitudinal direction thereof. And a winch for suspending a heavy object is suspended by a winch slider.

According to an eighth aspect of the present invention, in the scaffold for scaffolding as claimed in the second aspect, the auxiliary suspending portion has a horizontally extending rail body, and the rail body is provided with a winch slider capable of moving in a longitudinal direction thereof. A winch for suspending heavy objects is suspended by a winch slider.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a state in which an assembled scaffold for bridge piers of the present invention is suspended around a pier P already constructed, FIG. 2 is a front view of the same, and FIG. 3 is a side view of the same. is there. Further, FIG. 4 shows the pier P in FIG.
FIG. 3 is a perspective view in which the main components of the scaffold for scaffolding piers of the present invention are removed in a three-dimensional manner.

First, in FIGS. 1, 2 and 3, the pier assembly scaffold of the present invention is hung on the pier P, and maintenance is performed around the pier P.
Shows the status of work such as inspection and repair. In these figures, the bridge pier P is made of reinforced concrete, has a vertically raised columnar shape, and has a square cross section. It has a mounting part. The shape of the bridge pier P is a structure that supports highways, railways, etc. and is generally well constructed. Left and right of the upper part of this pier P (Fig. 1
In the right front side and the left back side, the surface is a right angle with the upper mounting portion spreading to the left and right. ), Fixed suspension parts 11 and 12 are fixed by anchor bolts, respectively. Although only the fixed suspension portion 11 is visible in FIG. 1, the fixed suspension portion 12 is fixed to the back side of the pier P at the same height position with anchor bolts as shown in FIG. The entire assembly scaffold for this pier is used for maintenance, inspection, and
It is removed except when repairing or the like, and is assembled only when repairing the pier P. Therefore, the pier assembly scaffold is suspended by anchor bolts fixed to the left and right wall surfaces of the upper part of the pier P and attached for temporary use. The state shown in FIGS. 1, 2, and 3 is as follows. It does not indicate the normal state of the pier P.

The fixed suspension parts 11 and 12 are provided with an H rail body 31 which horizontally extends laterally as will be described later, and the left and right ends of the H rail body 31 are side surfaces of the pier P, respectively. It is more prominent. Then, auxiliary hanging parts 13 and 14 are hooked and hung on the left and right ends of the fixed hanging parts 11 and 12, respectively. For this reason,
Around the upper part of the pier P, as shown in FIG. 4, a frame having a rectangular frame shape is formed by the fixed suspension parts 11, 12 and the auxiliary suspension parts 13, 14. Further, around the lower part of the pier P, a scaffolding portion 15 having a square insertion opening in the center thereof which is slightly larger than the outer shape of the pier P (this scaffolding portion 15 is assembled by connecting a plurality of members as described later). ) Is assembled and arranged so that it can be moved up and down. As shown in FIG. 4, the scaffold portion 15 includes the wire 1 suspended from the fixed suspension portion 11.
6, 17 and wires 18 and 19 suspended from the fixed suspension unit 12. That is, the entire scaffolding 15 assembled in the shape of a rectangular frame is suspended from the upper part of the pier P while being maintained horizontally by the four wires 16, 17, 18, and 19. By winding up the wires 16, 17, 18, and 19 with a winch to be described later, the entire scaffold portion 15 can be moved along the vertical length direction of the pier P.

Further, winches 36 and 45 are respectively combined with the fixed suspension parts 11 and 12 and the auxiliary suspension parts 13 and 14, and these winches 36 and 45 are fixed suspension parts 11 and 12 and auxiliary suspension parts, respectively. It can be moved horizontally along the length direction of the parts 13, 14. Each winch 3
Wires 37 and 46 are hung from the wires 6 and 45, and hanging hooks 38 and
47 are connected. With these hanging hooks 38 and 47, the upper end of a heavy and heavy iron plate can be grasped,
By winding the wires 37 and 46, the iron plates T-1 and T-2 can be pulled up above the ground. Due to this structure, the wires 16, 17, 1
8 and 19 can move the whole scaffolding 15 up and down along the pier P to set the height position at which the worker works, and by operating the wires 37 and 46, the iron plate T-1, The T-2 can be pulled up and moved to the repair position. These operations can be performed by an electrically operated motor, and it is not necessary for the worker to climb up and down to the height position of the pier P, and it is physically necessary to pull up the heavy iron plates T-1 and T-2. There is no burden (in FIG. 4, the winch 36 is illustrated as being combined with the fixed suspension part 11, but a winch having the same configuration is also combined with the fixed suspension part 12, Although 45 is illustrated as being combined with the auxiliary suspending portion 13, a winch having the same configuration is also combined with the auxiliary suspending portion 14. That is, the winch 45 is fixed in a frame shape around the upper portion of the pier P. Hanging parts 11, 12 and auxiliary hanging parts 13, 14 are arranged, and each fixed hanging part 1
Independent winches 36 and 45 are combined with the first and the second auxiliary suspension units 13 and 14, respectively. ).

Next, FIG. 4 is a skeleton diagram showing the arrangement of the pier-assembled scaffolds assembled around the pier P, and showing the positional relationship of the main members with the pier P in the center originally removed. In FIG. 4, the fixed suspension parts 11 and 12 have the same shape, and the auxiliary suspension parts 14 and 13 have the same shape. Therefore, the configurations of the fixed suspension unit 11 and the auxiliary suspension unit 13 will be described below, but the description of the fixed suspension unit 12 and the auxiliary suspension unit 14 will be omitted. However, since the configurations are exactly the same, the structure is symmetrical in the drawings.

The main member of the fixed suspension portion 11 is an H rail body 31 having an H shape in section and arranged horizontally. The H rail body 31 has an H shape in section 90.
It is positioned so that the upper and lower surfaces are flat by tilting down. For this reason, the upper and lower surfaces of the H-rail body 31 are flat, and the left and right side surfaces are arranged so as to have a cross section recessed inward in a "U" shape, and have a shape like a curtain rail. Mounting brackets 32 are fixed to the right and left two places on the upper surface of the H-rail body 31 by welding or the like, and the mounting brackets 32 can be fixed to the side surfaces of the pier P.
By fixing this mounting bracket 32 to the pier P, the entire fixed suspension part 11 can be attached to the pier P, and H
The rail body 31 can be held horizontally at a distance from the side surface of the pier P. The H rail body 31 serves as a guide rail, and a winch slider 33 is combined with the lower surface of the center of the H rail body 31.
The winch slider 33 can move along the length direction of the H rail body 31, and the winch slider 3
A winch 36 is attached to the lower part of 3. A wire 37 extending downward from the winch 36 is suspended, and the wire 37 is vertically moved by the winch 36. The lower end of the wire 37 is a suspension hook capable of grasping the upper end of an iron plate. 38 are connected.

Further, sliders 34 and 35 are combined on the left and right of the lower surface of the H rail body 31, and the sliders 34 and 35 are meshed with each other so that they can move along the length direction of the H rail body 31. There is. The lower end of the slider 34 is connected to the upper end of the wire 16, and the lower portion of the slider 35 is connected to the upper end of the wire 17. Similarly, sliders 39 and 40 are combined on the left and right of the lower surface of the H rail body 49 in the fixed suspension part 12, and the sliders 39 and 40 can move along the length direction of the H rail body 49. It is meshed like. The lower end of the slider 39 is connected to the upper end of the wire 19, and the lower portion of the slider 40 is connected to the upper end of the wire 19.

The main members of the auxiliary suspending portion 13 described above are
H rail body 4 having an H-shaped cross section and arranged horizontally
1, and the H-shaped cross section of the H rail body 41 is tilted by 90 degrees and positioned so that the upper and lower surfaces are flat. For this reason, the upper and lower surfaces of the H rail body 41 are flat, and the left and right side surfaces are arranged so as to have a cross section that is recessed inward in a "U" shape, and have a shape like a curtain rail. Then, at the left and right ends of the H rail body 41, one ends of L-shaped hooking metal fittings 42 and 43 are fixed so as to be perpendicular to the length direction of the H rail body 41, respectively.
It has a "U" shape with both ends bent inward by the three members of the H rail body 41 and the hooks 42, 43. By hooking the hook-shaped inwardly bent portions of both the hooking metal fittings 42 and 43 on the upper surface of the H rail body 31 of the fixed suspension portion 11 and the upper surface of the H rail body 49 of the fixed suspension portion 12, respectively. The entire auxiliary suspension unit 13 is suspended by the fixed suspension units 11 and 12.

The H-rail body 41 functions as a guide rail, and a winch slider 44 is combined with the lower surface of the center of the H-rail body 41. The winch slider 44 extends in the longitudinal direction of the H-rail body 41. A winch 45 is attached to the lower part of the winch slider 44. This winch 45
A wire 46 extending downward is suspended from the above, and this wire 46 is moved up and down by a winch 45. A suspension hook 47 capable of grasping the upper end of the iron plate is connected to the lower end of the wire 46. I am doing it.

Further, the auxiliary suspending portion 14 also has the same structure as the above-mentioned auxiliary suspending portion 13, and the lower surfaces of the auxiliary suspending portion 14 which are bent in a hook shape at both ends thereof have H rail bodies 31, 4 respectively.
It is hooked on the upper surface of the end portion of 9, and the auxiliary suspending portion 14 is suspended by the fixed suspending portions 11 and 12.
With this arrangement, the fixed suspension parts 11 and 12 and the auxiliary suspension parts 13 and 14 form a frame having a rectangular frame shape.

Next, the scaffold portion 15 located under the pier P
Is composed of four large members, a main scaffold plate 51, 52 and an auxiliary scaffold plate 53, 54 that can be disassembled, and can be separated into four members before being assembled as a scaffold. Winches 61 and 62 are provided on the left and right sides of the lower surface of the main scaffold plate 51, respectively.
Is capable of winding the wire 16, and the winch 62 is capable of winding the wire 17. Similarly, winches 63, 64 are provided on the left and right of the lower surface of the main scaffolding plate 52.
The winch 63 can take up the wire 18, and the winch 64 can take up the wire 19. These winches 61, 62,
By operating 63 and 64 at the same time, the wire 1
6, 17, 18, 19 can be rolled up or unwound at the same time, and wires 16, 17, 18, 19
The entire scaffold 15 can be moved up and down depending on the length. By this operation, the scaffolding 15 as a whole can be stopped at a position where work in the vertical direction of the pier P is required, and construction work such as repair, inspection, and maintenance can be performed.

A handrail 55 formed by combining pipes is vertically fixed around the main scaffold plate 51, and a handrail formed by combining pipes around the main scaffold plate 52 is also provided. 56 is fixed vertically. Both handrails 55 and 56 are main scaffolding plates 51 and 5, respectively.
It is arranged so as to form a "U" shape so as to surround the outer circumference of 2. A handrail 57 formed by combining pipes is vertically fixed to the outside of the auxiliary scaffolding plate 53, and a handrail 58 formed by combining pipes is also vertically formed on the outside of the auxiliary scaffolding plate 54. It is fixed to. Due to such a configuration, fences are arranged around the four sides of the scaffold portion 15 so that the handrails 55, 56, 57, and 58 can pass around, and the main scaffold plates 51, 5
2. It prevents the workers on the auxiliary scaffolding plates 53 and 54 from falling. The winches 61 and 62 can move horizontally along the length direction of the main scaffold plate 51,
The spacing between the wires 16 and 17 can be varied.
Further, the winches 63 and 64 can move horizontally along the length direction of the main scaffold plate 52, and the wires 18 and 19 can be moved.
The interval of can be changed.

Next, the structure of the above-mentioned fixed suspension part 11 will be described with reference to FIGS. 5 is an enlarged view of the front half of the fixed suspension part 11 in FIG. 4, and FIG. 6 is an enlarged view of the fixed suspension part 1 fixed to the pier P.
It is sectional drawing which shows the state which cut | disconnected 1 in the attachment metal fitting 32 up and down.

The H-rail body 31 is made of a drawn steel material having an H-shaped cross section. The H-rail body 31 is arranged such that the H-shape is inverted by 90 degrees so that the upper and lower surfaces are flat. A pair of holding plates 71 in the shape of a right triangle are fixed to the upper surface of 31 by welding or the like at intervals. A contact plate 72 made of a rectangular steel plate is fixed to the short side of the holding plate 71 (the side on the left rear side in FIG. 5) by welding or the like, and a bolt hole 73 is formed in the center of the contact plate 72 through a through hole. I am doing it. As described above, the mounting bracket 32 is composed of a pair of right-angled triangular holding plates 71, 71 and a rectangular contact plate 72.
The side surface of 2 is projected rearward (in the direction toward the left rear side in FIG. 5). Due to this configuration, when the back surface of the contact plate 72 is brought into close contact with the side wall of the pier P, the holding plate 71 acts as a hanger and the H rail body 31 is hung away from the side wall of the pier P as shown in FIG. Therefore, the side surface of the H-rail body 31 is located at a distance from the side surface of the pier P, and has a structure like a curtain rail. This holding plate 71
Is fixed to the side wall of the pier P by inserting the fixing bolt 74 into the bolt hole 73 of the contact plate 72 and screwing the fixing bolt 74 into the anchor 91 fixed to the pier P.

A winch slider 33 is fitted from the lower surface of the center of the H-rail body 31, and the winch slider 33 has a cross section formed by bending a thin steel plate into a "U" shape. The opening in the shape of “” is inserted upward from the lower surface of the H-rail body 31 to be combined. A pair of support shafts 77 are fixed to the inner sides of the opposite side surfaces of the winch slider 33, and rollers 78 are rotatably supported on the support shafts 77. These rollers 78 are H rail bodies 3
1, each roller 78 rolls on the upper surface projecting to the left and right below the H-rail body 31, and the winch slider 33 moves in the left-right direction (in FIG. 5). In FIG. 5, it can be freely moved from the front left to the rear right). An inverted trapezoidal hanging plate 79 made of a thin steel plate is vertically fixed to the plane on the lower surface of the winch slider 33, and a through hole 80 is formed at the center of the hanging plate 79. is there.
Further, a winch 36 is positioned close to the lower side of the suspension plate 79, and a band 81 fixed to the upper part of the winch 36 is inserted into a through hole 80 to winch the winch 3
6 is suspended by a suspension plate 79. The winch 36 accommodates a motor and the like inside, and the wire 37 can be wound or unwound by a drum, and the wire 37 can be lowered or raised.

A slider 34 is fitted from the lower left side of the H-rail body 31.
Has a cross-section formed by bending a thin steel plate into a "U" shape, and the opening having the "U" shape is inserted upward from the lower surface of the H rail body 31 to be combined. A pair of support shafts 86 are fixed to the inner surfaces on both sides of the slider 34, and rollers 87 are rotatably supported on the support shafts 86, respectively. These rollers 87 move in the hollowed-out space toward the center of both side surfaces of the H rail body 31, each roller 87 rolls on the upper surface protruding left and right under the H rail body 31, and the slider 34 moves. Left and right direction in FIG. 5 (from left front to right back in FIG. 5)
It has a structure that can be freely moved. A suspension plate 88, which is an inverted trapezoidal thin-walled steel plate, is vertically fixed to the plane of the lower surface of the slider 34, and a through hole 89 is formed at the center of the suspension plate 88.
The upper end of the wire 16 described above is inserted into and connected to the through hole 89.

Next, FIG. 6 is a cross section showing the construction of the H rail body 31 and the slider 34 in FIG. 5 described above. As described above, the H-rail body 31 has an H-shaped cross section, and is arranged so that H is inverted by 90 degrees so that the upper and lower sides are flat. For this reason, the left and right of the center of the H rail body 31 are constricted spaces, and the rollers 87, 87 are inserted into the spaces on the left and right, respectively.
87 are rotatably supported by supporting shafts 86, 86, respectively. Since each support shaft 86 is fixed to the inside of the bent side surface of the slider 34, it has the same shape as a top inserted through a so-called curtain rail, and the lower ends of the rollers 87, 87 are the H rail body 31. It is supported in contact with the upper surface of a flat surface that projects to the left and right at the bottom of the. With this configuration, the rollers 87, 87 roll in the spaces on the left and right of the H-rail body 31, and the slider 34 can be moved in the horizontal direction without falling in the vertical direction.

The upper part of FIG. 6 shows a structure in which the fixed suspension portion 11 is attached to the pier P.
The side wall of the pier P is drilled at a right angle with a drill or the like, and the anchor 91 is firmly fitted therein. A female screw is formed on the inner peripheral surface of the anchor 91. The bolt hole 73 is aligned with the position of the female screw of the anchor 91, and then the fixing bolt 74 is attached.
Is passed through the bolt hole 73 and screwed into the female screw of the anchor 91. Then, the fixing bolt 74 is screwed into the anchor 91, and the fixing bolt 74 is fixed to the pier P. By tightening the fixing bolt 74, the contact plate 72 is tightened.
Is fixed to the side wall of the pier P. Thus, as shown in FIG. 6, the entire fixed suspension part 11 is fixed to the bridge pier P, and a structure similar to that of the curtain rail is fixed to the wall surface, and the slider 34 does not contact the side wall of the pier P. The H rail body 31 is hung horizontally at a distance.

Next, FIG. 7 shows a state before disassembling the main scaffolding plates 51, 52 and the auxiliary scaffolding plates 53, 54 which are the main members of the scaffolding part 15 and assembling them as the scaffolding part 15. . As described above, the scaffolding portion 15 is the main scaffolding plate 5.
1 and 52 and auxiliary scaffold plates 53 and 54, thin connecting plates 95 and 96 are horizontally fixed to the left and right sides of the main scaffold plate 51 where the handrail 55 is not fixed. is there. Similarly, the main scaffolding plate 52 has thin connecting plates 97, 9 on the left and right sides of the side face to which the handrail 56 is not fixed.
8 is fixed horizontally. Further, the auxiliary scaffolding plate 53 has the shape of a flat scaffolding plate, and openings 99 and 100 are opened at the left and right ends thereof, respectively. Similarly, the auxiliary scaffolding plate 54 also has the shape of a flat plate scaffolding plate, and openings 101 and 102 are opened at the left and right ends thereof.

To assemble the main scaffold plates 51 and 52 and the auxiliary scaffold plates 53 and 54 to the scaffold portion 15, the connecting plate 9 is used.
The left and right lower surfaces of the auxiliary scaffolding plate 53 are brought into close contact with the upper surfaces of the auxiliary scaffolding plates 53 and 97, and the auxiliary scaffolding plate 54 is attached to the upper surfaces of the connecting plates 96 and 98.
Place the left and right undersides of each other in close contact with each other and place them in a square frame. After that, the bolt 103 is inserted into the opening 101 and screwed into the connecting plate 96, the bolt 104 is inserted into the opening 102 and screwed into the connecting plate 98, and the auxiliary scaffold plate 54 is fixed to the left and right main scaffold plates 51 and 52. . Similarly, bolts (not shown) are inserted into the openings 99 and 100, and the bolts are screwed into the connecting plates 95 and 97 to fix the auxiliary scaffolding plate 53 to the left and right main scaffolding plates 51 and 52. By assembling in this way, the scaffolding part 15 in the shape of the letter "B" in which the main scaffolding plates 51, 52 and the auxiliary scaffolding plates 53, 54 are arranged in four directions is assembled. In order to assemble the scaffold portion 15 in this manner, the main scaffold plates 51, 52 and the auxiliary scaffold plates 53, 54 are arranged on the ground surface of the pier P and assembled on the ground, or the main scaffold plates 51, 52 are wired. Auxiliary scaffolding plates 53, 5 are attached to the main scaffolding plates 51, 52 in a state of being suspended by 16, 17, 18, 19
Assemble by connecting 4. In this way, the scaffolding 1 having the shape of a "b" surrounding the pier P.
5 is assembled.

Next, FIG. 8 shows the wires 16 and 1 described above.
The mechanism for winding 7, 18, 19 is shown in a simplified manner. In FIG. 8, the configurations of the fixed suspension part 11 and the main scaffolding plate 51 are shown. However, the configurations of the fixed suspension part 12 and the main scaffolding plate 52 are the same as those in FIG. The description of the structures of the fixed suspension part 12 and the main scaffolding plate 52 is omitted.

Main scaffolding plate 51 constituting the above-mentioned scaffolding portion 15
An H-rail body 106 having an H-shaped cross section is horizontally arranged below, and the H-shaped cross section of the H-rail body 106 is tilted 90 degrees so that the upper and lower surfaces are flat. is there. For this reason, the upper and lower surfaces of the H-rail body 106 are flat, and the left and right side surfaces are arranged so as to have a cross section recessed inward in a "U" shape, and have a shape like a curtain rail. A pillar 107 is connected to one end of the H rail body 106 so as to form a right angle, and a pillar 108 is connected to the other end of the H rail body 106 so as to form a right angle. The left and right lower surfaces of the main scaffolding plate 51 are closely attached to the upper ends of both columns 107 and 108, respectively. Therefore, the main scaffolding plate 51 is supported from below by the H rail body 106 and the columns 107 and 108. In other words, the H-rail body 106 and the columns 107 and 108 form a "U" -shaped structure that opens upward, and the main scaffolding plate 51 is placed on the upper ends of both columns 107 and 108. . The H-rail body 106 is suspended from the H-rail body 31 by the wires 16 and 17 as will be described later.
Will be supported by.

From the upper surface on the left side of FIG. 8 of the H-rail body 106, the slider 1 having a structure similar to that of the slider 34 is formed.
10 are fitted, and the rollers 1 inserted into the space on the side surface of the H-rail body 106 on both sides of the lower portion of the slider 110.
12 is pivotally supported. This roller 112 is H rail body 1
The slider 110 can move horizontally in the left-right direction of the H-rail body 106 by rolling in the inner space of the side surface of 06. Similarly, from the upper surface on the right side in FIG. 8 of the H rail body 106, a slider 111 having a configuration similar to that of the slider 35 is fitted, and on both sides of the lower portion of the slider 111, in the space on the side surface of the H rail body 106. The inserted roller 113 is pivotally supported. By rolling this roller 113 in the internal space on the side surface of the H rail body 106,
The slider 111 can move horizontally in the left-right direction of the H-rail body 106.

On the upper surface of the slider 110, a drum support 114 formed by bending a thin steel plate into a slightly U-shape is placed with its opening facing upward. A winding drum 116 is supported between the plates on both sides with its axis horizontal, and a wire 16 is wound around the outer periphery of the winding drum 116. A gear 118 is coaxially fixed to one side of the winding drum 116 so that the winding drum 116 and the gear 118 rotate simultaneously. On the upper surface of the slider 111, a drum support 115 formed by bending a thin steel plate into a slightly U-shape.
Is placed with its opening facing upward, and a winding drum 117 is supported between the plates on both sides of the drum support 115 with its axis horizontal, and a wire is provided on the outer periphery of the winding drum 117. 17 is wrapped around.
A gear 119 is coaxially fixed to one side of the winding drum 117, and the winding drum 117 and the gear 11
9 is configured to rotate simultaneously.

Next, a drive shaft 125 having a spline groove (not shown in FIG. 8) formed in the lower portion of the drum support 114 is horizontally supported by the drive shaft 1.
A gear 128 that meshes with the gear 118 is inserted through the shaft 25. The gear 128 can slide in the longitudinal direction of the drive shaft 125, and the inner circumference of the gear 128 meshes with the spline groove of the drive shaft 125.
25 is configured to be rotated at the same time. Similarly, a drive shaft 12 having a spline groove (not shown in FIG. 8) formed in the lower portion of the drum support 115 in the longitudinal direction thereof.
6 is horizontally supported, and the drive shaft 126 has a gear 1
A gear 129 meshing with 19 is inserted. This gear 1
29 can slide along the length of the drive shaft 126,
Since the inner circumference of the gear 129 meshes with the spline groove of the drive shaft 126, the gear 129 and the drive shaft 126 are configured to rotate simultaneously.

Each of the drive shafts 125 and 126 is H
It extends horizontally to the center of the rail body 106, and the opposite end faces of both drive shafts 125 and 126 are coupled to each other.
It is flexibly connected by 27 and both drive shafts 125 and 126 are connected so as to rotate simultaneously. A gear 130 is fixed near the coupling 127 of the drive shaft 125, and a gear 131 is meshed with the gear 130.
It is configured to be rotated by 32. In addition,
As shown by the broken line in FIG. 8, a hydraulic cylinder 136 having its axis extended in the horizontal direction is fixed to the upper portion of the H-rail body 31. Further, as shown by a broken line in FIG. 8, a hydraulic cylinder 135 whose axis extends in the horizontal direction is fixed to the lower surface of the H-rail body 106.

Next, FIG. 9 shows the sliders 34 and 3 described above.
5 shows a mechanism capable of moving the slider 5 and the slider 5 simultaneously to the left and right and a mechanism capable of moving the sliders 110 and 111 simultaneously to the left and right.
Reference numeral 10 describes an interlocking synchronization mechanism capable of simultaneously moving in the same direction and simultaneously moving the slider 35 and the slider 111 in the same direction.

A cylinder rod 137 that horizontally expands and contracts by hydraulic pressure is projected at one end of the hydraulic cylinder 135, and an operating rod 139 is fixed to the cylinder rod 137 so as to be perpendicular to the lengthwise direction. I am doing it. Small pulleys 145 and 146 are rotatably supported on the left and right sides of the H-rail body 106, respectively. On the left and right sides of the small pulleys 145 and 146, a large pulley 1 having a slightly large diameter is provided.
47 and 148 are axially supported, and the small pulley 14 is provided on the left and right below the inside of the large pulleys 147 and 148.
9, 150 are respectively pivotally supported. This operating rod 139
Is connected to the tip of the wire 161.
61 is a small pulley 1 extending in the direction of the small pulley 145.
This wire 161 is wound around the outer circumference of 45 and inverted.
Is connected to the left side of the slider 111. The operating rod 139 is connected to the tip of a wire 162. The wire 162 extends in the direction of the small pulley 146 and is wound around the outer circumference of the small pulley 146 to be reversed. The end of the wire 162 is the slider 111. Is connected to the right side of.

Then, the wire 1 is attached to the operating rod 139.
The tip of 63 is connected, and the wire 163 extends in the direction of the small pulley 149 and is wound around the outer periphery of the small pulley 149 to be reversed, and then extends in the direction of the large pulley 148 and extends around the outer periphery of the large pulley 148. It is wound and inverted,
The end of the wire 163 is connected to the right side of the slider 110. Further, the operating rod 139 has a wire 16
4 is connected, and the wire 164 extends in the direction of the small pulley 150 and is wound around the outer periphery of the small pulley 150 to be reversed, and then extends in the direction of the large pulley 147 and extends around the outer periphery of the large pulley 147. The wire 164 is wound and inverted, and the end of the wire 164 is connected to the left side of the slider 110. In this way, the wires 161 and 1 are provided on the left and right sides of the slider 110 and the slider 111, respectively.
The ends of 62, 163, and 164 are connected to each other, and the sliders 110 and 111 always maintain a state of being pulled from the left and right.

Next, a cylinder rod 138, which expands and contracts in the horizontal direction, projects from the tip of the above-mentioned hydraulic cylinder 136, and at the tip of this cylinder rod 138, an operating rod 140 oriented in a direction perpendicular to the cylinder rod 138.
Is fixed. Small pulleys 151 and 152 are rotatably supported on the left and right sides of the H-rail body 31, respectively, and large pulleys 153 and 154 having slightly larger diameters are supported on the left and right sides of the small pulleys 151 and 152, respectively. The small pulleys 155 and 156 are axially supported on the left and right above the inside of the large pulleys 153 and 154, respectively. The tip of the wire 165 is connected to the operating rod 140,
The wire 165 extends in the direction of the small pulley 151, is wound around the outer circumference of the small pulley 151 and is inverted, and the end of the wire 165 is connected to the left side of the slider 35. The operating rod 140 is connected to the tip of a wire 166. The wire 166 extends in the direction of the small pulley 152 and is wound around the outer periphery of the small pulley 152 to be reversed. The end of the wire 166 is the slider 35. Is connected to the right side of.

The wire 1 is attached to the operating rod 140.
The tip of 67 is connected, and the wire 167 extends in the direction of the small pulley 155 and is wound around the outer periphery of the small pulley 155 to be reversed, and then extends in the direction of the large pulley 154 and extends around the outer periphery of the large pulley 154. It is wound and inverted,
The end of the wire 167 is connected to the right side of the slider 34. Further, the operating rod 140 has a wire 168.
The tip of the is connected, the wire 168 is a small pulley 1
The wire 168 extends in the direction of 56 and is wound around the outer periphery of the small pulley 156 to be inverted, and then extends in the direction of the large pulley 153 and is wound around the outer periphery of the large pulley 153 and is inverted. It is connected to the left side of 34. In this way, the wires 165, 166, and 1 are provided on the left and right sides of the slider 34 and the slider 35, respectively.
The ends of 67 and 168 are connected to each other, and the sliders 34 and 35 are always kept pulled from the left and right.

Next, a procedure for assembling the pier assembly scaffolding made of such members and installing it on the pier P which is vertically raised will be described.

Since the concrete support piers P are not usually provided with auxiliary suspenders for suspending the scaffolds, the anchors 91 for holding the scaffold assembly scaffolds must be fixed. For this reason, a worker drills a hole at each of the left and right four positions on the upper side surface of the pier P with a concrete hammer or the like, and drives the anchor 91 into the hole to fix it. In the case of this work, the worker descends to the work position while suspending it from the upper part of the pier P with a safety rope, or the worker mounts it on an aerial work vehicle having a bucket and approaches the work position, and in the air. Will be working.

If the anchor 91 can be fixed to the side wall of the pier P, then the fittings 32 provided on the fixed suspension parts 11 and 12 are brought into contact with the wall surface of the pier P, respectively, and the screw holes and bolts of the anchor 91 are attached. Align holes 73. If the positions of both are the same, as shown in FIG. 6, the fixing bolt 74 is inserted into the bolt hole 73, the fixing bolt 74 is screwed into the screw hole of the anchor 91, and the fixing bolt 74 is used to fix the mounting bracket 32 to the pier P. Fixed to. When the mounting bracket 32 is fixed to the pier P with the fixing bolts 74 in this manner, the fixed suspension parts 11 and 12 are fixed to the left and right of the pier P, as shown in FIGS. 1, 2 and 3. Thus, the H rail bodies 31 and 49 are held horizontally. The winch slider 33 and the sliders 34 and 35 are inserted from the left and right ends of the horizontal H rail body 31,
Winch slider 33, slider 3 in the length direction
Combine so that 4 and 35 can move. At the same time, H
The sliders 39 and 40 and the winch slider are also inserted into the rail body 49, and the sliders 39 and 40 and the winch slider are combined so as to be movable in the length direction of the H rail body 49.

As described above, the H rail body 31,
When 49 are fixed, the left and right ends thereof are projected horizontally from the left and right of the pier P. At the ends of these H rail bodies 31 and 49, the lower surfaces bent inwardly of the hook fittings 42 and 43 of the auxiliary suspending portion 13 are hooked to hook the auxiliary suspending portion 13 into the H rail body 31. Four
Suspend to 9. Therefore, the H rail body 41 of the auxiliary suspending portion 13 is held horizontally, and the winch slider 44, which is previously inserted into the H rail body 41, can freely move in the horizontal direction. Similarly, the auxiliary suspending unit 14 is also suspended horizontally on the other end of the H rail bodies 31 and 49. In these operations, a crane or the like is used to fix the fixed suspension parts 11 and 12, and the auxiliary suspension part 1.
3 and 14 are lifted from the ground or the body of the truck, and the pier P
It can be done by moving to the wall surface of.

Next, as shown in FIG. 7, the scaffold portion 15 is disassembled into the main members of the main scaffold plates 51 and 52 and the auxiliary scaffold plates 53 and 54. These members are arranged in four directions near the ground of the pier P, and the connecting plates 95 and 97 of the main scaffolding plates 51 and 52 are arranged.
Place both ends of the auxiliary scaffolding plate 53 on the base plate and insert bolts (not shown) into the openings 99 and 100 to connect the bolts to the connecting plate 9.
The main scaffolding plates 51, 52 and the auxiliary scaffolding plate 53 are fixed by screwing into 5 and 97. Similarly, both ends of the auxiliary scaffolding plate 54 are placed on the connecting plates 96 and 98 of the continuous main scaffolding plate 52, and the opening 10
1, the bolt 103 is inserted into the connecting plate 96 and screwed into the connecting plate 96, and the bolt 104 is inserted into the opening 102 and screwing into the connecting plate 98 to fix the auxiliary scaffolding plate 54 to the main scaffolding plates 51 and 52.
In this way, the scaffolding portion 15 is assembled into a "b" shape so as to surround the lower part of the pier P.
Then, the wire 16 is pulled out from the winch 61, the upper end of the wire 16 is connected to the lower part of the slider 34, the wire 17 is pulled out from the winch 62, and the upper end of the wire 17 is connected to the lower part of the slider 35.
Also, pull out the wire 18 from the winch 63, connect the upper end of the wire 18 to the lower part of the slider 39,
The wire 19 is pulled out from the winch 64, and the upper end of the wire 19 is connected to the lower portion of the slider 40.

The assembled state is shown in FIG. 4, and the skeleton of the fixed suspension parts 11, 12 and the auxiliary suspension parts 13, 14 in which the upper periphery of the pier P is surrounded by a "b" shape is formed. The wires 16, 17, 18, and 19 pulled down from the fixed suspension portions 11 and 12 suspend the scaffolding portion 15 having the shape of "b". With this configuration, when each winch 61, 62, 63, 64 is driven at the same time, and the wires 16, 17, 18, 19 are simultaneously wound by the respective winches 61, 62, 63, 64,
Since the total length of the wires 16, 17, 18, 19 is reduced, the scaffold portion 15 is pulled upward in the height direction of the pier P. In the operation of pulling up the scaffold portion 15, as shown in FIG. 8, the main scaffold plate 51 (the structure of the main scaffold plate 52 is the same as that of the main scaffold plate 51, the description of the function thereof is omitted here). Is provided with one motor 132, and by operating the motor 132, the wires 16 and 17 can be simultaneously wound and unwound by the same length. In this operation, the rotation of the motor 132 is transmitted to the drive shaft 125 via the gears 131 and 130, the rotation of the drive shaft 125 is transmitted to the drive shaft 126 via the coupling 127, and the drive shafts 125 and 126 rotate in the same direction. Rotated at speed. The rotation of the drive shaft 125 is transmitted to the gear 118 via the gear 128, and the gear 11
The winding drum 116, which is coaxially connected to the winding drum 8, is rotated. The rotation of the drive shaft 126 is caused by the rotation of the gear 129.
Is transmitted to the gear 119 via the shaft and rotates the winding drum 117 coaxially connected to the gear 119. In this way, the hoisting drums 116 and 11 provided on the left and right of the main scaffolding plate 51 by the single motor 132.
7 can be rotated in the same direction at the same speed, the winding amount and the rewinding amount of the wires 16 and 17 can be synchronized, and the main scaffolding plate 51 can be moved up and down while being kept horizontal. . Further, since the same interlocking mechanism is provided inside the main scaffolding plate 52, the main scaffolding plate 52 can also be moved up and down while maintaining the horizontal position.

By such an operation, the entire scaffold portion 15 moves up and down by winding and unwinding the wires 16, 17, 18, and 19, so that the scaffold portion 15 is the wall surface of the pier P and is used for maintenance, inspection, repair, and the like. It can be freely moved to the working position. By mounting the main scaffolding plates 51, 52 and the auxiliary scaffolding plates 53, 54 of the scaffolding part 15 on the upper surface of the worker, the worker can stand at the height position of the pier P to work, and work without assembling the scaffolding. The height can be changed freely.

In the work of arranging and fixing the iron plate around the wall surface of the pier P, the iron plate cannot be pulled up by the scaffold portion 15. A heavy iron plate can be lifted up to a working height position by winches 36 and 45. In this lifting of the iron plate, it is possible to use the hanging hooks 38 and 47 such as chucks to grasp and pull up the upper end of the iron plate. First, as shown in FIG. 2, the upper end of the iron plate T-1 is gripped by the hanging hook 38, and the winch 36 is operated to wind the wire 37, whereby the hanging hook 38 is pulled upward by the wire 37. Then, since the hanging hook 38 is gripping the iron plate T-1, the iron plate T-1 can be pulled upward from the ground by the hanging hook 38 and lifted to a position where welding or the like is performed. In the work of lifting the iron plate T-1 and fixing it by welding or the like, the iron plate T-1 may have to be set at the right and left corners of the pier P depending on the work place. In such a case,
Winch slider 33 with the iron plate T-1 suspended
Can be moved in the length direction of the H-rail body 31. Then, the rollers 78 pivotally supported inside the winch slider 33 roll in the hollow spaces formed on both sides of the H rail body 31, the winch slider 33 smoothly moves in the horizontal direction, and the hanging hook 38 causes the iron plate T to move. The -1 can be moved to a fixed position while it is suspended.

Similarly, as shown in FIG. 3, in order to lift the iron plate T-2 on the other side surface of the pier P, the upper end of the iron plate T-2 is grasped by the hanging hook 47 serving as a chuck, and the winch 45 is operated. By doing so, the wire 46 can be wound up, and the hanging hook 47 and the iron plate T-2 can be pulled up. Then, in order to move the iron plate T-2 left and right to the position where the wall surface of the pier P is fixed, the winch slider 44 is moved to move the winch 45, the wire 46, and the iron plate T-2 in the longitudinal direction of the H rail body 41. Can be moved horizontally along.

When the wall surface of the pier P is to be maintained, inspected, or repaired, the wires 16, 17, and 18 that suspend the scaffold 15 may interfere with the work. That is, when the iron plate T-1 is suspended at the central portion of the side surface of the pier P and a work such as welding is performed, it is preferable to move the wires 16 and 17 in the left-right direction to increase the distance. Also, at the corner of the pier P, the iron plate T-1
When performing work such as welding by suspending the wires, it is preferable to bring the wires 16 and 17 close to each other to narrow the distance. In this way, by changing the positions of the wires 16 and 17, the wire 1 is moved from the position of the pier P to be worked.
6 and 17 can be separated so that they can be adjusted so as not to disturb the work. As described above, in order to change the distance between the wires 16 and 17 so as not to disturb the work, the hydraulic cylinders 135 and 136 are operated and the left and right sliders 34, 35, 110 and 111 are simultaneously moved. The distance between the wires 16 and 17 can be increased or decreased.

In the operation of expanding the distance between the wires 16 and 17, the hydraulic pressure is simultaneously supplied to the hydraulic cylinders 135 and 136, and the cylinder rods 137 and 138 are pushed out simultaneously. Then, the operating rod 139 moves in the direction A in FIG. 9 by the cylinder rod 137, the wires 162 and 164 are pulled, and the wire 162 moves the slider 111 to the right in FIG. 9 while rotating the small pulley 146. The wire 164 moves the slider 110 leftward in FIG. 9 while rotating the small pulley 150 and the large pulley 147. In addition, the cylinder rod 138 causes the operating rod 140 to move to the position shown in FIG.
9, the wires 166 and 168 are pulled, the wire 166 moves the slider 35 to the right in FIG. 9 while rotating the small pulley 152, and the wire 168 moves the small pulley 156 and the large pulley 153. The slider 34 is moved leftward in FIG. 9 while rotating. With such interlocking, the wire 16 moves in the D direction in FIG. 9 by the movement of the sliders 34 and 110, and the wire 17 moves in the C direction in FIG. 9 by the movement of the sliders 35 and 111. Therefore, the distance between the wires 16 and 17 is increased, and the central portion of the pier P is opened.

In the operation of reducing the distance between the wires 16 and 17, the hydraulic pressure is simultaneously supplied to the hydraulic cylinders 135 and 136, and the cylinder rods 137 and 138 are simultaneously reduced. Then, the operating rod 139 is moved in the B direction in FIG. 9 by the cylinder rod 137, the wires 161 and 163 are pulled, and the wire 161 moves the slider 111 to the left in FIG. 9 while rotating the small pulley 145. The wire 163 moves the slider 110 to the right in FIG. 9 while rotating the small pulley 149 and the large pulley 148. In addition, the cylinder rod 138 causes the operating rod 140 to move to the position shown in FIG.
9, the wires 165 and 167 are pulled, the wire 165 moves the slider 35 to the left in FIG. 9 while rotating the small pulley 151, and the wire 167 moves the small pulley 155 and the large pulley 154. The slider 34 is moved to the right in FIG. 9 while rotating. With such interlocking, the wire 16 moves in the F direction in FIG. 9 by the movement of the sliders 34 and 110, and the wire 17 moves in the E direction in FIG. 9 by the movement of the sliders 35 and 111. For this reason, the distance between both wires 16 and 17 is reduced, and the pier P
Both corners are open.

In this way, the hydraulic cylinder 135,
By operating 136 at the same time, the wire 16,
Numeral 17 can be moved in the E direction or F direction in FIG. 9 while maintaining the vertical direction to increase or decrease the distance between the two. If the distance between the wires 16 and 17 increases,
A wire 1 is placed between the worker and the wall near the center of the pier P.
Since 6 and 17 are not located, they do not interfere with the work of fixing or welding the iron plate T-1. Further, if the distance between the wires 16 and 17 is narrowed, the wires 16 and 17 are not located between the worker and the wall surface at the left and right corners of the pier P, and the iron plate T
-It does not interfere with the work of fixing and welding 1.

[0064]

Since the present invention is configured as described above, the fixed suspension parts are fixed to the left and right of the upper part of the vertically raised bridge pier, and the wires are respectively suspended from the fixed suspension parts. The wire can be wound by the winch provided on the scaffolding part arranged around the lower part of the. Therefore, operate the winch, wind the wire,
By rewinding, the scaffolding part can be moved up and down in the height direction of the pier, and the worker on the scaffolding part can be freely moved to a working height position.
With this configuration, it is possible to arrange a scaffold that can move even on a pier provided in a place where an aerial work vehicle cannot enter, and since it is not necessary to assemble the scaffold from the ground, work efficiency can be improved.

Also, at the left and right ends of both fixed suspension parts,
Since the auxiliary suspending portion can be laid across so as to straddle both, the suspending portion can be arranged on each of the four upper surfaces around the pier. Therefore, when a winch or the like is arranged and various kinds of work are performed, tools and equipment can be suspended by these auxiliary suspending parts, and various kinds of work of the pier can be dealt with.

A winch is provided in this fixed suspension part, and a heavy object can be suspended from the ground by this winch. For this reason, in a reinforcing work for winding an iron plate around the pier to reinforce its strength, a heavy object such as an iron plate can be lifted without using a crane or the like, and work efficiency can be improved. When the iron plate is lifted, the iron plate can be pulled up in the space between the scaffolding portion and the pier, so that it does not interfere with the work.

A winch is also provided in the auxiliary suspending portion, and a heavy object can be suspended from the ground by this winch. Therefore, in the reinforcement work that wraps the iron plate around the pier and reinforces its strength, heavy objects such as iron plates can be lifted without using a crane.
Work efficiency can be improved. When the iron plate is lifted, the iron plate can be pulled up in the space between the scaffolding portion and the pier, so that it does not interfere with the work.

The fixed suspension part has a horizontally extending rail body, and a pair of upper sliders that can move in the length direction are provided on the rail body. Further, the scaffold portion has a horizontally extending rail body, and a pair of lower sliders that can move in the length direction are provided on the rail body. The upper slider is connected to the upper end of the wire, and the lower slider is fixed with a winch that winds each wire, and the scaffold is moved up and down along the pier by operating the winch. You can In this case, since the upper slider and the lower slider can be horizontally moved to the left and right respectively, the wire connecting them can be freely moved to the left and right along the wall surface of the pier. For this reason, depending on the work area of the pier, the wire may be an obstacle, and even in places where it is difficult to work, the wire can be moved from that position to the left and right, and an obstacle is placed between the pier surface and the scaffolding. Can be avoided.

Since the upper slider and the lower slider can be moved to the left and right at the same time in synchronization with each other,
It is possible to move left and right while maintaining the vertical direction of the suspended wire. Therefore, the wire can be moved while avoiding the wall surface that requires work on the pier, while maintaining the vertical posture for suspending the scaffold.

The fixed suspension part has a horizontally extending rail body, and a winch slider that can move in the length direction is provided on the rail body. Since a winch for lifting a heavy object is suspended on the winch slider, the heavy object can be moved horizontally while being suspended by the winch. Therefore, the heavy object can be horizontally moved in any of the left and right directions of the wall surface of the pier, and the material such as the iron plate can be arranged. For this reason, since it is not necessary to move heavy objects by human power, maintenance, inspection, and repair work can be performed quickly.

Further, the auxiliary suspending portion also has a horizontally extending rail body, and a winch slider capable of moving in the length direction is provided on the rail body. Since a winch for lifting a heavy object is suspended on the winch slider, the heavy object can be moved horizontally while being suspended by the winch. Therefore, the heavy object can be moved horizontally even on the other side surface on the wall surface of the pier where the fixed suspension part is not arranged, and materials such as iron plates can be arranged.

[Brief description of the drawings]

1 shows an embodiment of an assembled scaffold for piers of the present invention,
It is a perspective view showing a state where a scaffold is assembled and arranged on a pier.

FIG. 2 shows an embodiment of an assembled scaffold for piers of the present invention,
It is a front view showing the state where the scaffold was assembled and arranged on the pier.

FIG. 3 shows an embodiment of an assembled scaffold for piers of the present invention,
It is a front view showing the state where the scaffold was assembled and arranged on the pier.

FIG. 4 shows an embodiment of an assembled scaffold for piers of the present invention,
FIG. 3 is a perspective view showing a state in which scaffolds are assembled and arranged on a pier, and the pier is removed to show a combination of respective constituent members.

FIG. 5 shows an embodiment of an assembled scaffold for piers of the present invention,
It is a partially expanded view which shows a part of fixed suspension part.

FIG. 6 shows an embodiment of an assembled scaffold for piers of the present invention,
It is sectional drawing which shows the structure for fixing a fixed suspension part to a bridge pier.

FIG. 7 shows an embodiment of an assembled scaffold for piers of the present invention,
It is a perspective view showing a state before the main members of the scaffold portion are separated and assembled.

FIG. 8 shows an embodiment of an assembled scaffold for piers of the present invention,
It is the side view which abbreviate | omitted one part which shows the structure which hold | maintains the wire stretched between one fixed suspension part and the scaffold part.

FIG. 9 shows an embodiment of an assembled scaffold for piers of the present invention,
It is explanatory drawing which shows the mechanism for moving a wire to a right and left at the same time synchronously, and which shows the structure of the wiring of the wire for a synchronization. 11 Fixed Suspended Part 12 Fixed Suspended Part 13 Auxiliary Suspended Part 14 Auxiliary Suspended Part 15 Scaffold 16 Wire 17 Wire 18 Wire 19 Wire 33 Winch Slider 34 Slider 35 Slider 36 Winch 61 Winch 62 Winch 63 Winch 64 Winch

Claims (8)

[Claims] 1. A fixed suspension part fixed to the left and right of the upper part of the pier, a pair of wires suspended from each fixed suspension part, and a square-shaped arrangement so as to surround the periphery of the pier. A scaffold part that can move up and down in the height direction,
An assembled scaffold for piers, characterized in that a pair of scaffolds are arranged on each of the left and right sides, and each of the scaffolds comprises a winch capable of winding a wire. 2. A fixed suspension part fixed to the upper left and right of the pier, a pair of wires suspended from each fixed suspension part, and a square-shaped arrangement surrounding the periphery of the pier. A scaffold part that can move up and down in the height direction,
It is characterized by a pair of winches arranged on the left and right of the scaffolding part, each of which can wind a wire, and an auxiliary suspension part hung on the left and right ends of a pair of fixed suspension parts. Assembled scaffolding for piers. 3. The assembled scaffold for piers according to claim 1, wherein the fixed suspension part is provided with a winch for lifting a heavy object. 4. The scaffold for scaffolding according to claim 2, further comprising a winch for hoisting the heavy load of the auxiliary suspending portion. 5. The fixed suspension part has a horizontally extending rail body, and the rail body is provided with a pair of upper sliders that can move in the longitudinal direction. The upper sliders are respectively connected to upper ends of wires. The scaffolding part has a horizontally extending rail body, and the rail body is provided with a pair of lower sliders that can move in the lengthwise direction, and winches for winding the respective wires are fixed to the lower sliders. An assembly scaffold for piers according to items 1 and 2. 6. The fixed suspension is operated by synchronizing the horizontal movement of a pair of upper sliders provided in the fixed suspension portion with the horizontal movement of a pair of lower sliders provided in the scaffold portion. The assembly scaffold for piers according to claim 1 or 2, wherein the wire suspended from the hanging portion is moved in the left-right direction while maintaining the vertical. 7. The fixed suspension part has a horizontally extending rail body, and a winch slider movable in the length direction is provided on the rail body, and a winch for suspending a heavy object is suspended by the winch slider. An assembled scaffold for piers according to claims 1 and 2. 8. The auxiliary suspending portion has a horizontally extending rail body, and a winch slider capable of moving in the length direction is provided on the rail body, and a winch for suspending a heavy object is suspended by the winch slider. The assembled scaffold for piers according to claim 2.