JP4115472B2 - Assembly method for scaffolds in bridge structures - Google Patents

Description

The present invention relates to a method for assembling a scaffold used when painting the lower surface of a floor slab forming a vehicle traveling path in a bridge structure.

Conventionally, when painting the lower surface of a floor slab in a bridge structure such as a suspension bridge, or a horizontal structural member such as a main chord material or a middle chord material that supports this floor slab, the beams that support the floor slab and the inner surface inspection Scaffolding pipes were assembled by using the rails for the carriage and its receiving beams, and scaffolding plates were arranged on top of them to form a scaffold for painting. For example, as described in Patent Document 1, a scaffold for painting a truss structure under a floor slab is long on the upper surface of a horizontal structural member such as an upper chord member or a middle chord member that is a truss structure. The horizontal support frame is fixed at predetermined intervals in the vertical direction with both sides in the length direction protruding outward from the both side surfaces of the horizontal structural member, and the vertical support frame is fixed to both side ends of each support frame. A structure is known in which a scaffolding pipe is connected between the upper and lower ends of the vertical support frames on both sides and a scaffolding plate is installed between the scaffolding pipes adjacent in the length direction of the horizontal structural member.
JP 2002-61116 A

  However, according to such a scaffold, the fixing work of a large number of horizontal support frames to the horizontal structural member, the connection of the vertical support frame to the both ends of the horizontal support frame, the fixing work, the work of arranging the scaffolding pipe, There is a problem that many complicated operations such as the construction work of the scaffolding plate are required, and the assembling work takes a long time and is costly. Furthermore, since it is a dangerous work at a high place, there is a problem in ensuring safety and there is a problem that such a scaffold assembly work must be relied on by a specialized scaffold craftsman. Furthermore, such problems also occur in the work of dismantling and removing the scaffold.

  In addition, the above scaffold basically has a suspended scaffold structure, so it is difficult to take measures to prevent lifting and scattering in strong winds, and depending on the expected wind strength, remove some or all of the scaffold plates. The current situation is to reduce the wind pressure applied to the scaffold. Also, if an object is dropped during the work, it will fall further downward from the scaffolding, which is dangerous. Furthermore, such a scaffold structure is difficult to use as a scaffold for painting the entire bottom surface of the floor slab of the bridge structure.

The present invention has been made in view of the above problems, and its object is to enable efficient assembly and disassembly in a short time without requiring any skill under the floor slab of the bridge structure. In addition, it is an object of the present invention to provide a stable and strong scaffold assembling method capable of painting the lower surface of the floor board over the entire surface.

In order to achieve the above object, the scaffold assembling method in the bridge structure of the present invention, as described in claim 1, between the parallel horizontal structural members provided below the floor slab of the bridge structure, A beam material having a certain length from one end side in the length direction of these horizontal structural members is sent in a state in which the length direction is perpendicular to the length direction of the horizontal structural members, and the length of the beam material is After laying the lower surface of both ends in the direction between the rails laid along these horizontal structural members, the beam material is moved between these rails toward the other end side of the horizontal structural members, After the next beam material is installed between the rails in the same manner as described above, it is moved toward the other end of the horizontal structural member to be joined to the previously fed beam material, and this operation is repeated to repeat the horizontal structure. Many pieces between members In the assembly method of the scaffold in the bridge structure and arranged in spread form the over arm member to form a deck-like scaffold, the chain block is disposed above one side of the two horizontal structural members, these chain block After the beam material is sent to the lower side of the bridge structure through the passage on one side of the bridge structure, the upper surfaces of both ends of the beam material are lifted to the chain block and sent to between the one end portions of both horizontal structural members. The wheels attached to the lower surfaces of both ends of the beam material are placed between the end portions of the rails laid along the two horizontal structural members, and then the both end portions of the beam are horizontally structured by the sending means. It is characterized by moving a predetermined distance between the rails toward the other end side of the member.

Furthermore, the invention according to claim 2 is a beam material having a certain length from one end side in the length direction of the horizontal structural members between the parallel horizontal structural members provided below the floor slab of the bridge structure. Between the rails on which the bottom surfaces of both ends of the beam material are laid along these horizontal structural members with the length direction thereof being perpendicular to the length direction of the horizontal structural members. The beam material is moved between these rails toward the other end of the horizontal structural member, and then the next beam material is installed between the rails in the same manner as described above. It is joined to the beam material sent in earlier by moving it toward the other end of the frame, and this operation is repeated to arrange a large number of beam materials in parallel between the horizontal structural members in a deck-like scaffold. Bridge structures that form In the assembly process of kicking the scaffold, the several beams material fed between the two horizontal structural members as a set, after connected by the connecting member between the central upper surface of the length direction of each set of beam members, The connecting material is supported by a beam disposed under the floor slab of the bridge structure via a suspension support, and the beam and the connecting material are connected by a lifting prevention strut whose length can be adjusted. And

Moreover, the invention which concerns on Claim 3 is a beam material which has fixed length from the one end side of the length direction of these horizontal structural members between the mutually parallel horizontal structural members provided in the floor slab of a bridge structure. Between the rails on which the bottom surfaces of both ends of the beam material are laid along these horizontal structural members with the length direction thereof being perpendicular to the length direction of the horizontal structural members. The beam material is moved between these rails toward the other end of the horizontal structural member, and then the next beam material is installed between the rails in the same manner as described above. It is joined to the beam material sent in earlier by moving it toward the other end of the frame, and this operation is repeated to arrange a large number of beam materials in parallel between the horizontal structural members in a deck-like scaffold. In the bridge structure In the assembly method of that scaffold, fed out from the disposed a beam member tensioning device at one end of the two horizontal structural members, tension initially rests beam material these beams material across on between rail arrangement It is characterized by connecting the tip of the rope.

According to the scaffold assembling method according to claim 1 of the present invention , first, one end side in the length direction of these horizontal structural members is provided between the parallel horizontal structural members provided below the floor slab of the bridge structure. A beam material having a certain length is fed in such a manner that its length direction is perpendicular to the length direction of the horizontal structural member, and the bottom surfaces of both ends of the beam material along the horizontal structural member are aligned along these horizontal structural members. As the rail is installed between the rails, the existing rail for the inner surface inspection carriage such as the beam on the underside of the floor slab in the bridge structure is used as it is. By sequentially feeding the structural member in a state of being perpendicular to the length direction of the structural member, it can be easily placed between the rails.

  Furthermore, the beam material mounted between the rails can be accurately moved on the rail toward the other end of the horizontal structural member, and the work of joining the next beam material to the previously fed beam material is performed. Repeatedly arranging a large number of beam members in parallel between the horizontal structural members, so that the horizontal structure under the floor slab can be obtained in a short time without any complicated work and without any skill. In the space between the objects, a deck-like scaffold having a large area that can be reliably and easily painted from the bottom to the bottom of the floor slab can be assembled.

In addition, a chain block is disposed above one end of each of the horizontal structural members, and after the beam material is sent to the lower side of these chain blocks through a passage on one side of the bridge structure, Since the upper surfaces of both ends are lifted on the chain block and sent out between the ends of both horizontal structural members, the beam material is sequentially sent out accurately between the ends of both horizontal structural members with little manual labor. The wheels attached to the lower surfaces of both ends of the beam material can be mounted on the rails. After that, the both ends of the beam are sent to the other end side of the horizontal structural member by a feeding means and the rails are moved by a predetermined distance. Because it is moved, the beam material is placed on one end of both rails one after another without manual intervention, and the beam material following the preceding beam material is joined to the opposite surface. While it is efficiently laid it between both horizontal structural members.

Furthermore, according to the invention according to claim 2 , a set of several parallel beam members fed between the two horizontal structural members is used as a set, and each set of beam members is arranged between the upper surfaces of the central portions in the length direction. After connected by a connecting member, for preventing the connecting member bridges structure between the beams and the connecting member causes supported through a支具suspended in beam slab is arranged below the length-adjustable lifting Since it is connected by a support column, it is possible to constitute a scaffold with excellent stability and workability that prevents bending and lifting even though the span between the rails arranged between the horizontal structural members is long. it can.

According to a third aspect of the present invention, a beam material tensioning device is disposed on one end side of each of the horizontal structural members, and these beams are provided at both ends of the beam material first mounted between the rails. Since the tip of the rope that is fed out from the material tensioning device is connected, the other end of the scaffold is assembled with the opposing surfaces always joined to each other without separating the beam materials that are fed sequentially between the rails. When the scaffold is dismantled, the beam material is automatically pulled back to one end side between the two horizontal structural members automatically without the need for manpower by winding the rope and pulling it with its tensile force. At that position, collection and removal are sequentially performed by the chain block disposed above one end of both horizontal structural members, so that the dismantling operation can be performed smoothly and efficiently in a short time. Door can be.

The scaffold assembled by the method for assembling a scaffold in the bridge structure of the present invention has a large number of beam members arranged in parallel between parallel horizontal structural members provided below the floor slab of the bridge structure. Therefore, it is possible to construct a deck-like scaffold structure in which the space between the horizontal structures below the floor slab of a predetermined length portion is completely blocked. The truss structure can be easily painted, and of course, the rolling work that moves on the scaffold is used to ensure that the floor under the floor slab is painted over the entire bottom surface of the floor slab. Can be done. Furthermore, both ends of all the beam members are mounted so as to be movable in the length direction of the rails between the rails laid along the horizontal structural member, so that the orderly and stable between the rails. Thus, it is possible to construct a scaffold with a large work area that is reliably supported in the installed state.

  Next, a specific embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, A is made of a floor truss middle chord material in a truss structure B2 below a floor slab B1 of a bridge structure B. It is a scaffold stretched in a space between the horizontal structural members 1 and 1, and has a plurality of hollow rectangular tube-shaped aluminum beam members 2, 2. The vertical surfaces 2a and 2a are juxtaposed side by side in a joined state. Specifically, the horizontal structural member 1 made of a chord material in the floor truss of the truss structure B2 is provided at predetermined intervals (for example, every 12.3 m) in the bridge axis direction of the bridge structure B. The length of each horizontal structural member 1 directed in the direction perpendicular to the axis is larger than the above-described interval, and is formed to a length of 30 m, for example.

  Further, passages 3A and 3B having a predetermined width continuous in the bridge axis direction of the bridge structure B are provided on both side ends of the horizontal structural members 1, 1... The scaffold A composed of the multiple parallel beam members 2 is stretched so as to be assembled and dismantled in an arbitrary space in each space surrounded by the horizontal structural members 1 and 1 adjacent to each other and both side passages 3A and 3B. It is installed.

  That is, on the front and rear opposing surfaces of the horizontal structural members 1 and 1 adjacent to each other, a plurality of receiving pieces are provided at regular intervals in the length direction of the horizontal structural members 1 and 1 (the width direction of the bridge structure B). 4, 4... Project horizontally, and beam beams 5, 5 for inspection carriage rails are provided on the upper surfaces of the tip portions of the receiving beam pieces 4 along the length direction of the horizontal structural members 1, 1, respectively. In addition to being fixed in a supported state, rails 6 and 6 are laid on the beam members 5 and 5 in parallel with each other across the opposing surfaces of the side passages 3A and 3B. The distance between the front and rear rails 6 and 6 is 10.7 m when the distance between the front and rear horizontal structural members 1 and 1 is 12.3 m. Each beam member 2 has a width of 350 mm, The height is 175mm, the length is 11.5m, and the wall thickness is 3.5mm.

  Each beam member 2 is paired with a portion at the same distance as the front and rear rails 6 and 6 on the lower surfaces of both end portions in the length direction, with a small interval in the width direction as shown in FIG. The wheels 7 and 7 are rotatably supported, and a large number of these beam members 2 (60 in the figure) are moved, and the wheels 7 and 7 on the lower surfaces of both ends are moved onto the front and rear rails 6 and 6. By spanning in a state where it can be put on, and opposing surfaces 2a and 2a of the beam members 2 and 2 adjacent to each other in the front and back are closely joined and spread over the entire length of the front and rear rails 6 and 6, A 21m x 11.5m deck-shaped scaffolding A is formed.

  Furthermore, only the lengthwise ends of each beam member 2 are installed between the front and rear rails 6 and 6, and the length between the rails 6 and 6 is not supported at all. 6 will be bent downward with 6 as a fulcrum. In order to prevent this bending, the ceiling beam disposed in the bridge axis direction below the floor slab of the bridge structure B, as shown in FIGS. It is suspended from C via a suspension support 8.

  This suspension structure will be described in detail. All the beam members 2 have a pair of front and rear vertical protrusions 9a on the upper surface of the central portion in the length direction and at a small interval in the length direction of the beam member 2. , 9a 'are provided in a projecting manner, and pin insertion holes 9b, 9b' are provided in these projecting pieces 9a, 9a '. A set of several beam members 2 (six in the figure) arranged side by side is connected as a set, and the set of beam members 2 is integrally connected by a connecting member 10 in an aligned state.

  The connecting member 10 has a length equal to the width of the pair of beam members 2 and is formed in a small-diameter rectangular tube shape having a width that can be inserted between the pair of front and rear vertical protrusions 9a and 9a '. The front and rear vertical rectangular rectangular wall surfaces have pin insertion support holes 10a communicating on the same center line with the pin insertion holes 9b and 9b 'of the projecting pieces 9a and 9a' provided on each beam member 2. 10a 'and vertical connecting plate pieces 11a, 11a' each having a mounting hole for a shackle 11b bent in a gate shape at the center of the upper end at both ends in the longitudinal direction. A single connecting member 10 is inserted between the protruding pieces 9a and 9a 'of several beam members 2 arranged in parallel, and the protruding pieces 9a and 9a' of the beam member 2 are inserted between the pin insertion support holes 10a and 10a '. By inserting the pins 12 through the pin insertion holes 9b, 9b 'provided in the detachable manner, a set of several beam members 2 can be fixed integrally and It is formed in the shape of a wide scaffold plate.

  A plurality of sets (10 sets in the figure) of this set of beam members 2 are joined together by connecting the beam members 2 and 2 facing each other before and after the adjacent sets. The vertical connecting plate pieces 11a and 11a ′ fixed to the opposing end faces of the connecting members 10 and 10 are joined together in a butted manner and connected together by bolts and nuts 13. Then, the shackle 11b is attached to the shackle mounting hole provided at the center of the upper end of the connecting plate pieces 11a and 11a 'that are joined and fixed to each other by the bolts and nuts 13 by the support shaft 14, and is opposed to each shackle 11b. The shackle 11b is suspended by the suspension support 8 suspended from the ceiling beam C.

  Specifically, the suspension support 8 is connected to the mounting bracket 8a detachably attached to the ceiling beam C with the upper end of a rope 8b such as a wire rope or a chain having a certain length, and the rope. The upper end of the lever block 8c whose length can be adjusted is connected to the lower end of the article 8b, and a hook 8d is attached to the lower end of the lever block 8c, and the hook 8d is detachably hooked on the shackle 11b. The central part in the length direction of each set of beam members 2 is supported so as not to bend downward.

  Further, a lifting-adjustable prop 15 for adjusting the length is interposed between the upper surface of the central portion in the length direction of each connecting member 10 and the ceiling beam C above the central portion. By detachably connecting the beam C and the upper surface of the central portion of the connecting member 10, each set of a plurality of beam members 2 arranged side by side is prevented from floating in a strong wind.

  In addition, the upper surfaces of both end portions in the length direction of the beam member 2 as a set of several pieces are detachably connected by an angle member 16 having the same length as that of the connecting member 10 and an adjacent pair of angle members. The bolts with the connecting pieces 16a and 16a 'fixed integrally to the opposing end faces of 16 joined together. The nut 17 is detachably connected. Furthermore, in the multiple beam members 2 constituting the scaffold A, as shown in FIG. 7, the scaffold A is prevented from being lifted by strong winds along with the support columns 15 at both ends of the beam members 2 every few. The lift prevention device 18 is attached.

  The lifting prevention device 18 is provided with screw rods 18a penetrating between the upper and lower surfaces at both ends of the beam member 2 and a butterfly at the upper end of the screw rod 18a protruding from the upper surface of the beam member 2. While the nut 18b is screwed together, a locking hook 18c is integrally provided at the lower end of the screw rod 18a protruding from the lower surface of the beam member 2, and this locking hook 18c is laid on the rails 6 and 6. The fixed state in which the wheels 7 and 7 attached to the lower surfaces of both ends of the beam member 2 are positively pressed onto the rails 6 and 6 by being locked to the flange portion of the beam member 5 and tightening the wing nut 18b. It is what is maintained.

  Next, a method for assembling the scaffold A configured as described above and a device for carrying out this method will be described. As shown in FIGS. 1 and 8, one of the side passages 3A and 3B has one beam 3A in the center in the width direction, as shown in FIG. 1 and FIG. A traveling rail 20 of a carriage 19 which is placed in the state of facing toward and is carried between the extension of one end of adjacent front and rear horizontal structural members 1 and 1 which are parallel to each other is laid, and the beam 3 is passed through the passage 3A. The beam material 2 that is carried in is lifted above the carry-in passage 3A and arranged in parallel between the opposing surfaces of the adjacent front and rear horizontal structural members 1 and 1 above the carry-in passage 3A. A beam material lifting device comprising a chain block 21 suspended between one end portions of the rails 6 and 6 is disposed so as to be capable of reciprocating in the front-rear direction.

  Specifically, the beam material lifting device is installed on the outer end side of the carry-in passage 3A on the extension of one end portion of each of the front and rear rails 6, that is, on the passage portion on the outer side of the carriage traveling rail 20. A column material 22, 22 having a fixed height is erected with a slightly shorter front-rear interval than the interval between the front-rear rails 6, 6 facing in a direction orthogonal to the passage 3 A. Horizontal guide members 23, 23 project from the upper end of 22 to above one end of the front and rear rails 6, 6 so that the chain blocks 21, 21 can be reciprocated on these horizontal guide members 23, 23. And hooks 21a and 21a of the chain blocks 21 and 21 are releasably locked to ring-shaped locking fittings 2b and 2b fixed to the upper surfaces of both ends of the beam member 2 in the longitudinal direction. It is configured as follows.

  Further, on one end side of the front and rear rails 6 and 6, that is, on the receiving side of the beam member 2 from the carry-in passage 3A, one end portion of the beam members 5 and 5 on which the front and rear rails 6 and 6 are laid is supported. A horizontal work table 24 is fixed between the upper surfaces of the base end portions of the receiving beam pieces 4 and 4 as shown in FIGS. 9 to 11, and the beam material 2 is placed on the front and rear rails 6 and 6 on the horizontal work table 24. Delivery means for delivering from one end side toward the other end side is provided.

The beam material feeding means is provided with beam material feeding hydraulic cylinders 25 and 25 which extend and contract in a direction parallel to the front and rear rails 6 and 6 on the horizontal work table 24, and piston rods of these hydraulic cylinders 25 and 25. A vertical plate piece 25b supported by a horizontal guide protrusion 26a provided on a guide plate 26 standing on the horizontal work table 24 is slidably supported at the tip of the horizontal work table 24. The pin lifting hydraulic cylinder 27 that expands and contracts in the vertical direction is fixed to the rod, and the pin 27a at the upper end of the rod is freely detachable from the engagement hole 2c provided in the predetermined part of the lower surface of both ends in the length direction of the beam member 2. It is comprised so that it may be made to latch. Therefore, the space between the pins 27a and 27a of the front and rear pin lifting hydraulic cylinders 27 and 27 arranged in parallel with the front and rear rails 6 and 6 is an engagement hole provided on the lower surface of both ends of the beam member 2. It is configured to have the same interval as between 2c and 2c.

  Further, as shown in FIGS. 1 and 8, a construction deck 28 is laid in a longitudinally long space between one end of the front and rear beam members 5 and 5 and the carry-in passage 3A. Beam material tensioning devices 29 and 29 comprising winding drums are disposed at both front and rear ends. The rope 30 is fed from the beam tensioning devices 29 and 29 so that the ends of the rope 30 are connected to both end faces of the beam 2 that is first fed between the front and rear rails 6 and 6. Is always urged in the direction of winding with a constant pulling-back force, that is, in the direction of pulling back the beam member 2 toward the loading passage 3A. A handrail 31 is attached to the beam member 2 that is first fed between the front and rear rails 6 and 6. Further, instead of the erection deck 28, a safety net for fall prevention may be stretched.

Next, a description will be given of a method of stretching the scaffold A in the space between the front and rear horizontal structural members 1 and 1 using the scaffold assembly apparatus configured as described above. First, one end of the front and rear beam members 5 and 5 and the above After the installation deck 28 is provided on the space between the beam material 2 and the carry-in passage 3A, the length of one beam material 2 on the carriage 19 running on the rail 20 laid in the carry-in passage 3A. Mounted with the direction oriented in the length direction of the carry-in passage 3A, and travels between the column members 22 and 22 in which the chain blocks 21 and 21 are reciprocally moved on the horizontal guide members 23 and 23. Then stop at that position. Next, as shown in FIG. 8, the ring 21 attached to the upper surface of both ends of the beam member 2 by lowering the hooks 21 a of the chain blocks 21, 21 waiting above both ends of the beam member 2 on the carriage 19. After the hooks 21a and 21a are lifted, the beam member 2 is lifted up.

  After lifting the beam member 2, the chain blocks 21, 21 are extended along the horizontal guide members 23, 23 up to one end of the beam members 5, 5 arranged parallel to the front and rear horizontal structural members 1, 1. By moving, the beam member 2 is laterally fed, that is, the length direction of the beam member 2 is set to be perpendicular to the length direction of the front and rear horizontal structural members 1 and 1, and between the ends of the front and rear horizontal structural members 1 and 1 The wheels 7 and 7 mounted on the lower surfaces of both ends of the beam member 2 are placed on the front and rear rails 6 and 6 so that the beam member is interposed between the front and rear rails 6 and 6. 2 is put on the state.

  At this time, in order to place the wheels 7 and 7 of the beam member 2 on the rails 6 and 6 accurately and quickly, the beam member 2 is suspended by the chain blocks 21 and 21 on the horizontal work table 24. Is moved to the front, back, left and right to position the wheels 7, 7 above the rails 6, 6, and then the wheels 7, 7 are placed on the rails 6, 6 as shown in FIG. Thereafter, as shown in FIG. 10, the engagement is provided on the lower surfaces of both ends of the beam member 2 on the pin 27a of the pin lifting hydraulic cylinder 27 attached to the piston rod 25a of the beam material feeding hydraulic cylinder 25, 25. The hole 2c is locked. In this locking operation, first, the piston rod 25a of the beam material feeding hydraulic cylinders 25, 25 is extended to make the pin lifting / lowering hydraulic cylinder 27 stand by at the lowered position of the beam member 2, and at that position The hydraulic cylinder 27 is extended to raise the pin 27a to be inserted into the engagement hole 2c of the beam member 2 and locked.

  At this time, when the wheels 7, 7 of the beam member 2 are placed on the front and rear rails 6, 6, the engagement holes 2c, 2c provided on the lower surfaces of both end portions of the beam member 2 are connected to the pin lifting hydraulic cylinder 27. Therefore, the pin 27a can be easily and accurately moved to the engagement hole 2c only by moving the piston rod 25a of the beam material feed hydraulic cylinders 25 and 25. It can be positioned vertically downward.

  In this way, the engagement holes 2c, 2c provided on the lower surfaces of both ends of the beam member 2 are locked to the pins 27a, 2a of the pin lifting hydraulic cylinders 27, 27, and are first mounted between the front and rear rails 6, 6. The ropes 30 of the beam material tensioning devices 29 and 29 are connected to both end surfaces of the beam material 2 to be formed. After that, the piston rods 25a of the beam material feed hydraulic cylinders 25, 25 are contracted, and the pins 27a, 27a locked to the engagement holes 2c, 2c of the beam material 2 are connected to the other ends of the front and rear rails 6, 6. By moving forward by a certain length toward the side, the beam member 2 is moved by a distance (about 400 mm) larger than the width of the beam member 2 while rotating the wheels 7, 7 on the front and rear rails 6, 6. Thus, a space for receiving the next beam member 2 is formed between the one ends of the front and rear rails 6 and 6. At this time, the rope 30 connected to both end faces of the beam material 2 is pulled out from the beam material tensioning device 29 according to the movement amount by the movement of the beam material 2.

Next, after the second beam member 2 is carried to the lower part between the front and rear chain blocks 21 and 21 by the carriage 19 on the carry-in passage 3A side in the same manner as described above, the wheels 7 and 7 are lifted by the chain blocks 21 and 21. Is placed on the front and rear rails 6 and 6, and then the locking is released by lowering and releasing the pin 27 a of the hydraulic cylinders 27 for lifting and lowering the pin from the engaging hole 2 c of the beam member 2 that is first fed. The piston rod 25a of the material feed hydraulic cylinders 25, 25 is extended so that the pins 27a are positioned below the engagement holes 2c, 2c provided on the lower surfaces of both ends of the second beam member 2, and then the pins 27a Pins 27a, 27a by extending the lifting hydraulic cylinders 27, 27
Is inserted and locked in the engagement holes 2c and 2c.

  At this time, when the pin 27a is removed from the engaging holes 2c, 2c of the beam material 2 fed first, as described above, the beam material 2 is pulled by the pulling force of the beam material tensioning devices 29, 29 so that the second beam The rails 6 and 6 are slightly retracted toward the material 2 side, and one side surface perpendicular to the longitudinal direction is joined in close contact with the second opposing surface of the beam material 2, and these beam materials 2 and 2 are joined together and arranged side by side with the pulling back force of the beam material tensioning devices 29 and 29 so that one side surface of the second beam material 2 is brought into contact with the end surface of the construction deck 28; Accept. In this way, the beam member 2 fed between the ends of the rails 6 and 6 is brought into contact with and received by the end face of the construction deck 28, so that the positions of the engagement holes 2c and 2c are always fixed positions. Accordingly, the amount of movement of the pins 27a, 27a due to the extension of the beam material feeding hydraulic cylinders 25, 25 is constant, and without being aligned each time the beam material 2 is fed onto the rails 6, 6, The pin 27a can be inserted and locked into the engagement hole 2c easily and reliably.

  After inserting and locking the pins 27a, 27a into the engagement holes 2c, 2c of the second beam member 2, the piston rods 25a of the beam material feeding hydraulic cylinders 25, 25 are contracted again, so that these two The beam members 2 and 2 are integrally moved toward the other end side of the front and rear rails 6 and 6 by moving the beam members 2 and 2 by the same fixed length as described above, and formed by the movement. The third beam member 2 is fed into the space between the end portions of the front and rear rails 6 and 6 by the chain blocks 21 and 21 from the carry-in passage 3A side in the same manner as described above, and is engaged with the engagement hole 2c of the second beam member 2. The pin 27a which is stopped is detached from the engagement hole 2c, and the first and second beam members 2 are integrated with the third beam member 2 side by the tensile force of the beam member tensioning devices 29 and 29. And retract one side of the second beam material 2 to the third In close contact with the opposite side surface of the rubber member 2, these three beam members 2 are arranged side by side and are retracted integrally by the pulling force of the tensioning devices 29, 29 to bring the third beam member 2 into the installation deck. In this state, the pins 27a of the lifting / lowering hydraulic cylinders 27, 27 are engaged with the engagement holes 2c, 2c provided on the lower surfaces of both ends of the third beam member 2 in this state. After stopping, the beam material feed hydraulic cylinders 25 and 25 are contracted to move the three beam materials 2 integrally by a predetermined distance toward the other end side of the front and rear rails 6 and 6.

  Similarly, the beam material 2 is sequentially fed from the carry-in passage 3A side by the chain blocks 21 and 21, and several (six in the figure) are placed on one end of the front and rear rails 6 and 6 in a lined state. When mounted, as shown in FIG. 4, a pair of front and rear projecting pieces 9a, 9a ′ projecting on the upper surface of the central portion in the longitudinal direction of these beam members 2 and communicating with each other in the width direction of the beam member 2 In between, each of the beams is inserted between pin insertion support holes 10a and 10a 'in which the connecting member 10 having a length equal to the width of these several beam members 2 is inserted and the pin 12 is provided in the connecting member 10. By inserting them through the pin insertion holes 9b, 9b 'provided in the projecting pieces 9a, 9a' of the material 2, these several beam materials 2 are connected together, and the lengths of these beam materials 2 Large plate-like scaffolding plate A1 by connecting the upper surface of both ends in the direction together by the angle material 16 described above Formation to.

  Then, following the formation of the scaffold plate A1, a plurality of beam members 2 are successively fed onto the end portions of the rails 6 and 6 in the same manner as described above to form the next several scaffold plates A1. In addition to the front and rear rails 6 and 6, the scaffold plate A1 is formed and joined to the above-described scaffold plate A1 by the operation of the beam material feeding hydraulic cylinders 25 and 25 and the pin lifting and lowering hydraulic cylinders 27 and 27. The connecting plate pieces 11a and 11a ′ of the connecting members 10 and 10 fixed to the center and both ends of the scaffold plates A1 and A1 are moved toward the end side by a fixed distance, and the angle member 16 , 16 connecting pieces 16a and 16a ′ are connected to each other by bolts and nuts 13 and 17 in a state of abutting each other.

  In the following, the scaffolding plate A1 having a set of several beam members 2 is moved toward the other end side of the front and rear rails 6 and 6 while being formed one after another between the one end portions of the front and rear rails 6 and 6, and sequentially. As shown in FIG. 1, a deck-like scaffold A having a size of 21 m × 11.5 m spread over the entire length of the front and rear rails 6 and 6 with several (10 in the figure) scaffolding plates A1 by connecting them. Form. In this state, the ropes 30 and 30 connected to both ends of the beam member 2 disposed on the most other end side of the front and rear rails 6 and 6 are installed on one end side of the front and rear rails 6 and 6. While the beam material tensioning devices 29 and 29 are pulled in the pull-back direction with a constant tensile force, the beam material 2 disposed on the most end side of the front and rear rails 6 and 6 is in contact with the end face of the installation zeck 28. It has been received.

  After the assembly of the scaffold A, the shackle 11b is attached to the shackle mounting holes of the connecting plate pieces 11a and 11a 'of the connecting members 10 and 10 that connect the adjacent scaffold plates A1 and A1, and As shown in FIG. 3, after the hook 8c of the lever block 8c of the suspension support 8 suspended from the ceiling beam C is locked, the hook 8c is lifted by operating the lever block 8c. It corrects the downward deflection of the central portion of the beam member 2 constituting the scaffold plate A1, and prevents the occurrence of the deflection, thereby improving the flatness of the scaffold A.

  Further, an uplift prevention column 15 having an adjustable length is interposed between the upper surface of the central portion in the length direction of the connecting member 10 of each scaffolding plate A1 and the ceiling beam C above the center portion. By detachably connecting the end portion to the ceiling beam C and the upper surface of the central portion of the connecting member 10, the scaffold plate A1 is prevented from being lifted in a strong wind. Further, in the multiple beam members 2 constituting the scaffold plate A, the screw rods 18a of the anti-lifting device 18 attached to both ends of each of several beams are operated to lock the lower ends thereof. The hooks 18c are locked to the upper flange portion of the beam member 5 on which the rails 6 and 6 are laid, and the wing nuts 18b are tightened to fix the wheels 7 and 7 attached to the lower surfaces of both ends of the beam member 2 to the rail 6 , 6 is positively pressed on to prevent the lifting of both ends of the scaffold A.

  In this way, after assembling a scaffold A composed of a plurality of parallel beam members 2 over the entire length of the front and rear rails 6 and 6, a rolling tower D is disposed on the scaffold A as shown in FIG. A worker rides on the tower D and moves the rolling tower D on the scaffold A while performing the entire painting operation on the lower surface of the floor slab B1 of the bridge structure B on the scaffold A, and coating the truss structure B2. Do work. At this time, since only the suspension support 8 provided in the center part of the scaffold A and the lifting prevention column 15 prevent the rolling tower D from moving, the suspension support 8 and prevention of the lifting are prevented. By arranging the rolling towers D and D on the scaffolds A on both sides of the support column 15, the painting operation can be performed smoothly and efficiently while moving the rolling tower D freely. When the painting operation using the scaffold A is completed, the scaffold A is disassembled and collected and assembled in the same manner as described above between the front and rear rails 6 and 6 between the next adjacent horizontal structural members 1 and 1.

  The dismantling and removal work of the scaffold A is performed in the reverse order of the assembly work. That is, first, the wing nut 18b of the lifting prevention device 18 is loosened to release the locking hook 8c from the flange portion of the beam member 5, the lifting prevention column 15 is removed, and the lever block in the hanging support 8 is further removed. After the lower end hook 8d of 8c is removed from the shackle 11b attached to the connecting plate pieces 11a and 11a 'of the connecting members 10 and 10 connecting the adjacent scaffolding plates A1 and A1, the connecting members 10 and 10 are connected to each other. The joint member 10 is removed from the scaffold plate A1, and the angle members 16, 16 connecting the upper surfaces of both ends of the scaffold plate A1, are also uncoupled and the angle member 16 is removed from the scaffold plate 10. As a result, the connection between the several beam members 2 forming each scaffold plate A1 is released.

  In this way, after all the beam members 2 constituting the scaffold A are uncoupled, they are installed between the end portions of the front and rear rails 6 and 6, and the vertical side surface is brought into contact with the installation deck 28. The hooks 21a of the chain blocks 21 and 21 are hooked on the locking metal fittings 2b and 2b projecting from the both ends of the upper surface of the beam member 2 on the end side, and the chain blocks 21 and 21 are lifted up to the carry-in passage 3A. Is moved, and after that, by being suspended, it is placed on the carriage 19 waiting below it.

  On the other hand, as described above, the beam member 2 that is first sent between the front and rear rails 6 and 6 and is disposed at the outermost end on the other end side of the front and rear rails 6 and 6, as described above, The ropes 30 pulled out from the beam material tensioning devices 29 and 29 disposed on the front and rear ends of the erection deck 28 are connected, and all the beam materials connected to the beam material 2 are connected to one end of the front and rear rails 6 and 6. The beam material 2 at the extreme end at one end of the front and rear rails 6, 6 is lifted by the chain blocks 21, 21 and detached from the front and rear rails 6, 6. Then, the rope 30 of the beam material tensioning devices 29 and 29 is rewound by a length corresponding to the width of the beam material 2 and all the beam materials 2 existing between the front and rear rails 6 and 6 are joined to each other. Wheels 7 and 7 attached to the lower surfaces of both end portions While rolling on the front and rear rails 6, 6, it moved to the conveyance path 3 A side by a length corresponding to the width of one beam member 2, and the next beam member 2 abutted against the end face of the construction deck 28 and stopped. It becomes a state. In order to receive the beam member 2, a receiving member is protruded from the installation deck 28 or from the carry-in passage 3 </ b> A without using the installation deck 28, and is received by this receiving member. You may comprise as follows.

  Thus, when the beam material 2 is removed, all the beam material 2 is automatically drawn toward the transport path 3A side by the winding force of the rope 30 of the beam material tensioning device 29, 29, so that no manual operation is required. Further, the beam material 2 can be removed without operating the beam material feeding hydraulic cylinders 25, 25 and the pin lifting / lowering hydraulic cylinders 27, 27.

  The beam material 2 placed on the carriage 19 is carried to the next scaffold assembly place between the horizontal structural members 1 and 1 adjacent to each other on the carriage traveling rail 20 in the front-rear direction. Between the ends of the rails 6 and 6 on the beams 5 and 5 laid in parallel with each other along the horizontal structural members 1 and 1, and the horizontal guide members 23 of the column members 22 and 22 at this position. Beam material feed hydraulic cylinders 25 and 25 and beam material tensioning devices 29 and 29, which are provided with pin lifting hydraulic cylinders 27 and 27, are suspended by chain blocks 21 and 21 that are reciprocally movable. The scaffold A is assembled.

  In this way, the carriage traveling rail 20 is laid in the passage 3A continuously provided in the bridge axis direction (length direction) at one end of the bridge, and inside the passage 3A, the bridge Since the horizontal structural members 1 are sequentially arranged at regular intervals in the bridge axis direction with the length direction thereof being perpendicular to the length direction of the passage 3a, each adjacent horizontal structure is passed through the passage 3A. Assembling and disassembling of the scaffold A using the multiple beam members 2 between the members 1 and 1 can be performed smoothly in sequence. Note that one beam member 2 may be placed on the carriage 19 and carried to the assembly position of the scaffold, but several beam members 2 may be placed and carried to the assembly position.

  Further, a wide range of beam materials may be prepared by welding the two beam materials 2 in a preliminarily aligned state. In this case, the assembly time of the scaffold A can be further shortened. Can do. Further, wheels 7 and 7 are attached to the lower surfaces of both ends of the beam member 2, and the wheel member 7 is rolled on the front and rear rails 6 and 6, whereby the beam member 2 is moved in the longitudinal direction of the front and rear rails 6 and 6. The sliding plate slides on the rails 6 and 6 while engaging the front and rear rails 6 and 6 on the lower surfaces of both ends of the beam member 2 instead of the wheels 7 and 7. May be fixed.

The simplified top view of this invention scaffold. The simplified perspective view which abbreviate | omitted that part. The simplified front view of the attachment part of a suspension support and a support pillar for raising. The top view of the one part. The side view of a suspension support and the support pillar for raising. The simple vertical side view which shows the connection structure of a beam material and a connection material. The simplified vertical side view of the floating prevention device. The front view of a beam material lifting device part. The vertical side view of a beam material delivery means part. The front view. Plan view.

Explanation of symbols

A Scaffolding B Bridge structure
B1 Floor slab 1 Horizontal structural member 2 Beam material
3A Beam material carry-in passage 6 Rail
7 Wheel 8 Hanging support
10 Connecting material
15 Lifting prop
19 cart
20 Bogie rail
21 Chain block
29 Beam tensioner

Claims (3)

Between the horizontal structural members parallel to each other provided below the floor slab of the bridge structure, a beam material having a certain length from one end side in the length direction of these horizontal structural members, the horizontal direction of the length direction The beam material is fed in a state of being perpendicular to the length direction of the beam material, and the lower surfaces of both ends of the beam material are installed between the rails laid along these horizontal structural members, and then the beam material is horizontally Move between the rails toward the other end of the structural member, and then lay the next beam material between the rails in the same manner as above and then move toward the other end of the horizontal structural member. Assembling the scaffolding in the bridge structure, which is joined to the beam material previously fed in, and this operation is repeated to form a deck-like scaffolding by arranging a large number of beam materials in parallel in the horizontal structure member In the method After serial chain block is disposed above one side of the two horizontal structural members, it was fed a beam member through one side of the passage of the bridge structure to the lower of these chain blocks, both end portions the top surface of the beam member Is lifted onto the chain block and sent out between the ends of both horizontal structural members, and the wheels attached to the lower surfaces of both end portions of the beam member by hanging the rails are laid along the horizontal structural members. It is mounted between one end portions, and then both ends of the beam are moved by a predetermined distance on the rails toward the other end side of the horizontal structural member by the sending means. Assembly method. Between the horizontal structural members parallel to each other provided below the floor slab of the bridge structure, a beam material having a certain length from one end side in the length direction of these horizontal structural members, the horizontal direction of the length direction The beam material is fed in a state of being perpendicular to the length direction of the beam material, and the lower surfaces of both ends of the beam material are installed between the rails laid along these horizontal structural members, and then the beam material is horizontally Move between the rails toward the other end of the structural member, and then lay the next beam material between the rails in the same manner as above and then move toward the other end of the horizontal structural member. Assembling the scaffolding in the bridge structure, which is joined to the beam material previously fed in, and this operation is repeated to form a deck-like scaffolding by arranging a large number of beam materials in parallel in the horizontal structure member In the method Serial to parallel beam material several fed into between the horizontal structural members as a set, after connected by the connecting member between the central upper surface of the length direction of each set of beam material, bridges the coupling member A bridge structure characterized by supporting a beam arranged below a floor slab of a structure via a suspension support and connecting the beam and a connecting member by a lifting prevention column whose length can be adjusted . Assembly method for scaffolding. Between the horizontal structural members parallel to each other provided below the floor slab of the bridge structure, a beam material having a certain length from one end side in the length direction of these horizontal structural members, the horizontal direction of the length direction The beam material is fed in a state of being perpendicular to the length direction of the beam material, and the lower surfaces of both ends of the beam material are installed between the rails laid along these horizontal structural members, and then the beam material is horizontally Move between the rails toward the other end of the structural member, and then lay the next beam material between the rails in the same manner as above and then move toward the other end of the horizontal structural member. Assembling the scaffolding in the bridge structure, which is joined to the beam material previously fed in, and this operation is repeated to form a deck-like scaffolding by arranging a large number of beam materials in parallel in the horizontal structure member In the method Serial disposed beam member tensioning device at one end of the two horizontal structural members, both ends of the initially rests beam material on the inter-rail connecting the front end of the rope to be unwound from the beams material tensioning device A method for assembling a scaffold in a bridge structure , characterized by comprising :

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