JP2007051416A - Scaffold device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scaffold device capable of being continuously moved without using any exclusive rail. <P>SOLUTION: The scaffold device is equipped with a scaffold body 2 for working and a movement supporting device 3 mounted to the scaffold body 2 and moving by suspending and supporting the scaffold body 2 from a collar 103 of a bridge 101. Since the movement supporting device 3 is equipped with a plurality of follower wheels 6 and 6 moving on the collar 103, a driving wheel 7 attracted under the collar 103 by a magnetic force, a rotation driving mechanism moving the scaffold body 2 in a state of holding the collar 103 between the follower wheels 6 and the driving wheel 7 and a switching means 26 switching the follower wheels 6 to moving positions and non-moving positions on the collar 103, the collar 103 of the bridge 101 is held between the follower wheels 6 and the driving wheel 7 to suspend the scaffold body 2 to move. The movement is stopped at positions of a splice plate and a bolt or positions connecting a cross beam to a bridge girder, the follower wheels 6 are switched to the non-moving positions, and the follower wheels 6 are switched to the moving positions to be enable to move after the positions are made to pass through. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a scaffold device used for a bridge.

  Conventionally, as this kind of scaffolding device, a sliding means that can be slidably mounted in the longitudinal direction of the scaffolding body and a flange such as a bridge girder and a horizontal girder are installed vertically Suspension gripping means for suspending the entire sandwich from a bridge girder, a girder, etc., swiveling means for pivoting the scaffold main body with respect to the suspension gripping means, and lifting means for raising and lowering the suspension gripping means with respect to the scaffold main body There is a swing movement type bridge inspection scaffold (for example, Patent Document 1) to which a mounting swivel device is attached, and a scaffold main body on which a person can ride and work, and the scaffold main body is parallel to or parallel to a bridge beam. There is a bridge inspection scaffold (for example, Patent Document 2) that can travel on such dedicated rails and includes wheels that travel on the bridges or the dedicated rails.

In addition, as a method of suspending the scaffold device as described above at the lower part of the pier, a method of causing the inspection scaffold to sink under the bridge by a dedicated vehicle having a boom composed of a lifting arm, a vertical saddle, and a vertical beam (for example, Patent Document 3) There is a method of providing a dedicated balance weight that balances the weight of the work scaffold on the side opposite to the other end of the work scaffold and suspending it from above the bridge under the bridge (for example, Patent Document 4).
JP 59-145807 A JP 59-130904 A JP 62-185907 A JP-A-62-288258

  In the apparatus of Patent Document 1, when changing the work place, one of the mounting swiveling devices is removed from the bridge girder and the handle of the swiveling means of the mounting swiveling device still attached to the bridge girder is turned to swivel the scaffold body. Therefore, the moving work is troublesome and the scaffold body cannot be moved continuously in the length direction of the bridge.

  On the other hand, in the apparatus of Patent Document 2, when a dedicated rail is used, the scaffold body can be moved continuously in the length direction of the bridge. However, when a bridge girder flange or the like is used for the rail without providing a dedicated rail, for joining the bridge girder made of steel, attachment plates are provided so as to sandwich the flanges and webs on both sides, and the attachment plates Since the bolts are inserted and joined, there are attachment plates and bolts on the outer surface of the flange at the joints, etc., and the upper surface of the flange is not a continuous flat surface, and it is impossible to run at the joint where the attachment plate is provided. Therefore, a dedicated rail is required, and this dedicated rail has to be provided on both sides in the width direction along the entire length of the bridge, resulting in a problem that the equipment cost increases.

  In addition, in the method of suspending the above-described scaffold device in the lower part of the pier, since a dedicated vehicle is required in Patent Document 3, a general-purpose crane or the like cannot be used, and in Patent Document 4, for balance. A dedicated balance weight is separately required, and this balance weight is used for hanging, so it is not necessary for the scaffold work, and the weight of the scaffold must be increased by its weight.

  Then, this invention aims at providing the scaffold apparatus which can move continuously, without using an exclusive rail, and also provides the scaffold apparatus which can perform suspension work simply. Objective.

  The invention of claim 1 is a scaffold device comprising a working scaffold main body, and a moving support device that is provided on the scaffold main body and moves while supporting the scaffold main body on a buttock of a bridge. The movement support device includes a plurality of upper rotational movement means that move on the collar part, a lower rotational movement means that is pressed or adsorbed to the lower part of the collar part, and the upper rotational movement means that is not moved from the movement position on the collar part. Switching means for switching to a moving position is provided, and the scaffold main body is moved by the rotational force of the lower rotational moving means with the collar being sandwiched between the upper and lower rotational moving means.

  According to a second aspect of the present invention, the scaffold main body is a fixed scaffold main body, a movable scaffold main body that is slidable in the length direction of the fixed scaffold main body, and the movable scaffold main body is slidably driven with respect to the fixed scaffold main body. Drive means.

  According to the configuration of the first aspect, the scaffold main body is suspended with the brim portion of the bridge sandwiched between the upper and lower rotational movement means, and moved by the rotational force of the lower rotational movement means. And, in the place where the cross plate is connected to the attachment plate and bolt of the bridge girder joint, or the cross beam, after the movement is stopped, the upper rotation moving means is switched to the non-moving position, The upper rotational movement means can be switched to the movement position and moved. Further, since the lower rotation moving means is pressed against or adsorbed to the buttocks, the scaffold main body can be reliably moved by the rotational force of the lower rotation moving means.

  And in the brim part of the bridge, the upper side has a connecting part of the cross beam and the web's attachment plate in addition to the attachment plate, while the lower side has the attachment plate, but compared to the upper side, Since there are few places which obstruct | occlude driving | running | working and it rotates and moves the lower rotation moving means pressed or adsorb | sucking under the collar part, a scaffold main body can be moved smoothly. In addition, since it is not necessary to incorporate a rotation driving means or the like in the upper rotation moving means, the upper rotation moving means can be reduced in weight, and a switching means for changing the position of the upper rotation moving means can be simplified.

  Therefore, it is not necessary to provide a dedicated rail or the like on the bridge, and the scaffold main body can be moved using the brim of the bridge girder where there is a joint location or a cross girder connection location.

  According to the second aspect of the present invention, the center of gravity on the center side of the scaffold body is lifted while the scaffold body is extended by sliding the movable scaffold body outward. Then, the upper rotational movement means is aligned on the heel part, and the lower rotational movement means is aligned under the heel part, and the scaffold body is suspended from the bridge. Since the movable scaffold body projecting in this way acts as a balance weight, it is possible to obtain a scaffold device that is structurally useless.

  If the upper and lower rotational movement means are movably provided in the length direction of the scaffold body, the height of the suspended scaffold body is between the upper and lower rotational movement means. In this state, the upper and lower rotational movement means are moved in the length direction of the scaffold main body, and the scaffold main body is suspended from the bridge with the buttocks sandwiched therebetween.

  Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, an unprecedented scaffold device is obtained by adopting a scaffold device different from the conventional one, and each of the scaffold devices will be described.

  Hereinafter, Example 1 of the scaffold device of the present invention will be described with reference to FIGS. As shown in FIG. 1, the scaffold device 1 includes a working scaffold main body 2 and a moving support device 3 that moves the scaffold main body 2 while lifting and supporting the scaffold main body 2 on the flange 103 of the bridge girder 102 of the bridge 101. The movement support device 3 includes body frames 4 and 4 provided on the left and right sides of the scaffold body 2, frame drive mechanisms 5 and 5 provided to move the body frame 4 in the left and right direction of the scaffold body 2, and the body frame. 4, driven wheels 6, 6 as left and right upper rotational moving means provided on the front and rear of 4, and driven wheels 6, 6 as upper rotational moving means provided at the center of the main body frame 4 between these front and rear upper rotating means 6, 6. And left and right drive wheels 7, 7 provided on the main body frame 4 and serving as downward movement means. The bridge girder 102 is made of a magnetic material such as steel.

  The scaffold body 2 includes a lower frame portion 11 and four handrail frame portions 12. A main body frame 4 which is a main body of the movement support device 3 is connected to the upper rail 13 of the handrail frame portion 12 by the frame driving means 5 and 5. As shown in FIG. An upper mounting member 14 is provided on the main body frame 4, the upper mounting member 14 and the lower mounting member 15 are connected by a pin 16 such as a bolt, and a plurality of rollers 17, 17 are provided on the lower mounting member 15, These rollers 17 and 17 are inserted into the upper rail 13 so as to be able to roll, and a rack 19 that also serves to prevent the roller 17 from being detached is fixed to one side edge of the opening of the upper rail 13, and meshes with the rack 19 The lower mounting member 15 is provided with a motor 18 as a driving means for rotationally driving a gear (not shown). The upper rail 13 is made of a U-shaped steel material.

  Therefore, when the motor 18 of the frame driving mechanism 5 is driven, the gear meshing with the rack 19 rotates, and the main body frame 4 moves in the left-right direction (length direction) of the scaffold main body 2.

  The driven wheel 6 moves while rotating on the upper surface of the collar portion 103 at a movement position in contact with the collar portion 103, and supports the load of the scaffold body 2. As shown in FIGS. The main body frame 4 is provided with attachment portions 21 and 21, and the attachment portions 21 and 21 are provided with pivot shafts 22 so that the base ends of the rotation arms 23 can be pivoted. Thus, the driven wheel 6 is provided so as to be rotatable about the pivot shaft 22 with respect to the main body frame 4.

  Further, as shown in FIG. 4, short piece portions 23A and 23A are integrally projected on the base end side of the rotating arm 23 in a direction away from the main body frame 4, and pivots are provided at the distal ends of the short piece portions 23A and 23A. 24, one ends of the link pieces 25, 25 are rotatably connected, and the other ends of the substantially arcuate link pieces 25, 25 are rotatably connected to the operating portion 27 of the switching means 26 by the pivot 24A. . The mounting portions 21 and 21 are provided with a pivot 28 at a position closer to the main body frame 4 than the pivot 22, and one end of a substantially L-shaped link piece 29 and 29 is rotatably connected to the pivot 28. The other ends of the link pieces 29 are connected to the operating portion 27 so as to be rotatable by the pivot shaft 24A. Further, on the other side of the mounting portion 21, other side mounting portions 31, 31 are provided on the main body frame 4, and the switching means 26 is rotatably provided on the other side mounting portions 31, 31 by a pivot 32. As shown in FIG. 4, the pivot 32 is located below the pivots 22, 24, and 28.

  The switching means 26 includes a main body 33 rotatably provided by the pivot 32 and an operating rod 34 that moves forward and backward with respect to the main body 33, and the operating portion 27 is provided at the tip of the operating rod 34. ing. The operating rod 34 has a male screw portion 34A. A rotary handle 36 is connected to an operating shaft 37 projecting from the main body 33, and the operating shaft 37 is rotated to move the operating shaft 37 into the main body 33. The operating rod 34 is advanced and retracted by the provided screw type feeding mechanism. In the figure, reference numeral 38 denotes a cylindrical cover provided on the main body 33, and the proximal end side of the operating rod 34 is accommodated.

  Then, when the operating rod 34 moves backward from the moving position of the driven wheel 6 shown in FIG. 4 (a position along the upper surface of the flange portion 103), the operating portion 27 has an arc K centered on the pivot 28 of the link piece 29. Retreating along the trajectory, the movement of the operating portion 27 causes the rotation arm 23 to rotate through the link piece 25, and the driven wheel 6 moves in the non-moving position shown in FIG. In this non-moving position, the driven wheel 6 does not interfere with the collar portion 103 even when the scaffold body 2 is lowered. The left and right rotating arms 23 of the main body frame 4 are provided with one driven wheel 6, and the central rotating arm 23 of the main body frame 4 is provided with two driven wheels 6 and 6 arranged side by side. It has been.

  As shown in FIG. 7, the drive wheel 7 is attached to the main body frame 4 by an attachment frame 41. The mounting frame 41 is rotatably provided on the main body frame 4 by a pivot 43, and the drive wheel 7 is rotatably provided on the mounting frame 41 by a pivot 42. The pivot 42 is rotatably provided on the mounting frame 41. Further, on the other side of the driving wheel 7, urging means 44 for urging the driving wheel 7 upward is provided, and this urging means 44 is rotatable at one end by the pivot 45 to the mounting frame 41. The other end is rotatably connected to the main body frame 4 by a pivot 46, and a force in a direction to open the pivots 45, 46 is generated by a coil spring or the like.

  The driving wheel 7 is an attracting wheel provided with a magnet attracted to the flange portion 103, and as shown in FIGS. 8 to 9, a wheel flange 111, two side slopes 112, 112 provided integrally therewith, Magnets 114 and 114A and a magnet mounting arm 115 are provided, and the magnets 114 and 114A are fixed to the pivot 42 via the magnet mounting arm 115. The wheel flange 111 is made of a non-magnetic material and does not affect the magnetic field of the magnet. Further, the entire circumference of the wheel flange 111 is covered with a flexible material 116 such as rubber so as not to damage the flange 103 which is a moving surface when the drive wheel 7 moves.

  When the magnet mounting arm 115 is rotatably provided on the pivot 42, when the drive wheel 7 rotates along the flange 103, the magnet 114 suspended on the pivot 42 is a magnetic body. The direction in which the magnetic field is strongest is naturally directed to the portion 103, and the attractive force (absorbing force) acts as a pressing force for pressing the driving wheel 7 through the pivot shaft 42 in that direction.

  The attractive force of the drive wheel 7 is determined by the gap between the magnet and the magnetic body and the shape of the magnet 4. In this class of driving wheels 7, even if a rather thick flexible material 116 is wound around the wheel flange 111, a thickness of 10 mm is sufficient for the wheel flange 111, so the cap between the wheel flange 111 and the magnet 114 is 12 mm. If so, the adsorption power can be expected up to about 250 kgf. At this time, the weight of the magnet 114 and the other wheels is 8 kg, respectively, and the total weight is 16 kg. Therefore, the adsorption force per wheel unit mass is about 16 kgf / kg.

  On the other hand, paying attention to the width L of the magnet 114, the gap between the magnet 114 and the flange 103 increases from the center of contact to the outside. Therefore, even if the magnet 114 is enlarged in this direction, an increase in the attractive force can be expected. Therefore, it is not necessary to increase the width L of the magnet 114 to a certain extent.

  The base 41 of the expansion / contraction means 51 is rotatably provided on the mounting frame 41 by a pivot 51A, and the distal end 52A of the expansion / contraction bar 52 of the expansion / contraction means 51 is rotatably connected to the link piece 53. The link piece 53 is connected to the pivot shaft 42, and the telescopic rod 52 is advanced and retracted by a motor 54 as a driving means.

  Therefore, when the expansion / contraction means 51 is driven at a position where the magnet 114 faces the flange 103, the direction of the magnet 114 is changed, the attractive force is lowered, and the drive wheel 7 can be removed from the flange 103.

  Further, a motor-driven rotation drive mechanism 56 that is a movement drive means is provided inside the drive wheel 7, and this rotation drive mechanism 56 is fixed to the pivot 42, and is a rotation transmission wheel that is driven by the motor. The wheel flange 111 rotates when the wheel 57 contacts the inner periphery of the wheel flange 111 and the rotation transmission wheel 57 rotates.

  Next, the operation of the above configuration will be described. As shown in FIG. 1 and the like, the driven wheel 6 is disposed on the upper surface of the flange portion 103 and the drive wheel 7 is placed on the lower surface of the flange portion 103 by the urging means 44. The scaffold body 2 is suspended below the bridge girder 102 with the flange 103 interposed between the driven wheel 6 and the drive wheel 7. Since the main body frame 4 of the moving support device 3 can be moved along the upper rail 13 by the motor 18, the positions and intervals of the main body frames 4 on both sides can be adjusted according to the bridge 101.

  In the suspended state, the scaffold body 2 is supported by the magnet 114 of the driving wheel 7 being attracted to the flange 103 made of a magnetic material by a magnetic force, so that the driven wheel 6 can be reduced in size. Then, the driving wheel 7 is rotationally driven by the rotational driving mechanism 56, and is moved in the length direction of the bridge girder 102 by the rotational force thereby, and stopped at a predetermined position to perform maintenance on the lower portion of the bridge 101. This maintenance includes repair work by painting and various inspection work. Instead of using the rotation drive mechanism 56, the drive wheel 7 may be manually rotated to apply a rotational force. In this case, for example, a handle (not shown) is provided at the rotation center of the drive wheel 7. Or the like, and a drive wheel 7 may be rotated by manually operating a handle attached thereto.

  While moving by the moving support device 3, as shown in FIG. 10, the place where the bridge girder 102, 102 is connected by sandwiching the flange 103 between the attachment plates 105, 105 and the bolt nut 106 is shown in FIG. If it is on the right side, the right driven wheel 6 is brought into the non-moving position by the switching means 26 as shown in FIG. By doing so, the driven wheel 6 can move without interfering with the contact plate 105 or the like. Even if one driven wheel 6 is moved to the non-moving position, the scaffold main body 2 is stably suspended by the two driven wheels 6 at the center and the left and the two drive wheels 7. When the right driven wheel 6 is moved to the right side in FIG. 1 after being moved to the non-moving position, the driving wheel 7 is also moved by the magnet 114 in the attracting plate 105 portion, and the right driven wheel 6 is discontinuous. After passing through a certain contact plate 105, it is returned to the moving position again. Similarly, the driven wheels 6 and 6 on the center side are set to the non-moving position, passed through the discontinuous portion, and then returned to the moving position. The driven wheel 6 is set to the non-moving position, passes through the discontinuous portion, and then returned to the moving position. In this way, the scaffold main body 2 can be moved even if the hook portion 103 has the discontinuous portion.

  And the drive wheel 7 provided with the magnet 114 is driven by the rotational drive mechanism 56, and the brim 103 of the bridge girder 102 is used as a substitute rail, and a dedicated traveling rail is not required. Diversion is possible for bridges. In addition, by using the drive wheel 7 provided with the magnet 114, it is possible to travel while adsorbing the drive wheel 7 even in the discontinuous portion of the flange 103. Furthermore, since the scaffold body 2 has a simple and robust structure, the scaffold body 2 is excellent in maintainability. Moreover, although it is a temporary type, it has durability like a permanent scaffold, and can be moored and stored on the bridge 101 for a long period of time when it is suspended. Furthermore, since there is no assembly work at the site such as on the bridge 101, the installation can be performed quickly.

  Thus, in this embodiment, corresponding to claim 1, the working scaffold main body 2 and the scaffold main body 2 provided on the scaffold main body 2 are suspended and supported by the flange 103 of the bridge 101 and moved. It is a scaffold apparatus provided with the movement support apparatus 3, Comprising: The movement support apparatus 3 is pressed or adsorb | sucked under the collar 103 with the driven wheel 6.6 which is a some upper rotational movement means which moves on the collar 103. Driving wheel 7 as a lower rotational movement means, and switching means 26 for switching the driven wheel 6 between a moving position and a non-moving position on the collar 103, and sandwiching the collar 103 between the driven wheel 6 and the driving wheel 7 In this state, the scaffold body 2 is moved by the rotational force of the driving wheel 7. Therefore, the scaffold body 2 is suspended by sandwiching the flange 103 of the bridge 101 between the passive wheel 6 and the driving wheel 7. Move by. And in the place where the crossing plate 105 and the bolt 106 of the bridge girder joint or the cross beam is connected to the bridge girder, the movement is stopped, the driven wheel 6 is switched to the non-moving position, and after passing through the position, The driven wheel 6 can be moved by switching to the moving position. Further, since the drive wheel 7 is pressed against or adsorbed to the collar portion 102, the scaffold body 2 can be reliably moved by the drive wheel 7.

  In addition, in the flange 103 of the bridge 101, the upper side includes a connecting portion of a cross beam and a web attachment plate in addition to the attachment plate 105, while the lower side includes the attachment plate 105 but the upper side. Compared to the above, there are few places that obstruct travel, and the drive wheel 7 that is pressed or adsorbed under the collar 101 rotates and moves, so that the scaffold body 2 can be moved smoothly. Further, since the scaffold body 2 is configured to move by the rotational force of the drive wheel 7, it is not necessary to incorporate a rotation drive means or the like in the driven wheel 6, so that the driven wheel 6 can be reduced in weight. Therefore, the switching means 26 for changing the position of the driven wheel 6 is also simple.

  Therefore, it is not necessary to provide a dedicated rail or the like on the bridge, and the scaffold main body 2 can be continuously moved using the collar portion 103 of the bridge girder 102 where there is a joint location or a cross girder connection location.

  Further, as an effect of the embodiment, the movement support device 3 is provided with a plurality of main body frames 4 and 4, and the main body frame 4 is provided with driving wheels 6 and driven wheels 7, and the main body frames 4 and 4 are frame-driven. Since the mechanism 5 is configured to be movable in the left-right direction (length direction) of the scaffold body 2, the distance between the main body frames 4, 4 can be adjusted in accordance with the distance between the ribs 103, 103 on the bridge 101. Excellent in properties. Further, since the lower rotational movement means is the drive wheel 7 having the magnet 114 that is attracted to the flange 103, the drive wheel 7 is attracted to the flange 103 by the magnetic force of the magnet 114.

  FIG. 12 shows a second embodiment of the present invention. The same reference numerals are given to the same portions as those in the first embodiment, and detailed description thereof will be omitted. The bridge girder 102A is composed of a column made of a steel material in a square shape, and the flanges 103 are continuously provided in the length direction of the bridge girder 102A on the lower left and right sides thereof.

  FIGS. 13-20 shows Example 3 of this invention, attaches | subjects the same code | symbol to the same part as each said Example, and abbreviate | omits the detailed description, This example is the said scaffold main body 2 Is divided into a fixed scaffold body 2A and a movable scaffold body 2B. The fixed scaffold body 2A has the same structure as the scaffold body 2 of the first embodiment, and is provided with the movement support device 3, and the movable scaffold body 2B. In order to be able to be inserted into the fixed scaffold main body 2A, the front and rear widths of the fixed scaffold main body 2A are narrower and lower than the fixed scaffold main body 2A. ing.

  As shown in FIGS. 13 to 17, the movable scaffold body 2 </ b> B is slid and driven with respect to the fixed scaffold body 2 </ b> A by the slide drive means 61. The slide driving means 61 is rotatably provided with support rollers 62, 62 on both lower sides in the front-rear direction of the fixed scaffold main body 2A, and these support rollers 62, 62 support the bottom of the lower frame portion 11 of the movable scaffold main body 2B. In addition, restriction rollers 63, 63 are provided on both sides in the front-rear direction of the movable scaffold body 2B, and these restriction rollers 63, 63 move in the restriction grooves 64, 64 of the lower frame portion 11 of the fixed scaffold body 2A. Thus, the height position of the movable scaffold body 2B is restricted with respect to the fixed scaffold body 2A. Further, the slide driving means 61 is provided with a rack 65 on the lower surface of the lower frame portion 11 of the movable scaffold body 2B. The rack 65 is provided in the left-right direction at the center in the front-rear direction of the movable scaffold body 2B. Gears 66 and 66A that mesh with each other are provided on the fixed scaffold main body 2A, and a motor 67 that is a driving means for driving one of the gears 66 is provided on the fixed scaffold main body 2A. 68, and a sprocket 68A for transmitting the rotation of the sprocket 68 by the chain 69 is provided on the shaft 68G of the other gear 66A. In the figure, reference numeral 70 denotes an attachment member 70 for rotatably mounting the shaft 66G of the gear 66A and the sprocket 67A to the fixed scaffold body 2A. The chain 69 is fixed to a predetermined position by a position adjusting portion 70A composed of a screw rod and a nut. The shaft 68G can be fixed so as to be in tension.

  Accordingly, when the motor 67 is driven, the gears 66 and 66A rotate in the same direction, and the movable scaffold body 2B having the rack 65 meshing with the gears 66 and 66A slides relative to the fixed scaffold body 2A. .

  Further, on the one side in the left-right direction of the fixed scaffold main body 2A, there are provided overhangs 71, 71 around the bottom of the lower frame part 11, and the handrail frame part 12 has The lower frame part 11 is provided.

  Next, the operation of the above structure will be described. The scaffold body 2 is contracted, that is, the movable scaffold body 2B is housed in the fixed scaffold body 2A, and the scaffold body 2 is attached to a transport vehicle 81 such as a truck. It is mounted and transported to the site of the bridge 101, and the movable scaffold body 2B is slid and extended toward the overhanging rod 71. In this state, the movable and fixed scaffold bodies 2A and 2B are partially overlapped at the center in the left-right direction. Yes. Then, as shown in FIG. 19, the center side of the scaffold body 2 in the stretched state is lifted using a general-purpose machine such as a crane 72. In this case, the lifting rope 73 provided on the crane 72 is locked to the distal end side of the overhang bar 71 and the location of the fixed scaffold body 2A at the target position with the center of gravity of the scaffold body 2 interposed therebetween. Thus, the scaffold body 2 can be stably lifted. That is, the movable scaffold main body 2B side is supported by the overhang bar 71, and an excessive force is not applied to the overlapping part of the fixed scaffold main body 2A and the movable scaffold main body 2B when lifting.

  Then, when suspending, the scaffold body 2 is suspended below the bridge girder 102 with its length direction matched to the length direction of the bridge 101, and is turned approximately 90 degrees (FIG. 19). As shown in the figure, by extending the movable scaffold body 2B, the movable scaffold body 2B acts as a weight, the fixed scaffold body 2A is positioned below the bridge girder 102, and the movable support device 3 is attached to the collar portion 103. Can be set. In addition, as shown in FIG. 20, after the scaffold body 2 is suspended from the heel part 103 by the movement support device 3, the movable scaffold body 2 </ b> B is moved inward in the length direction and further moved to the outer side on the opposite side, The fixed scaffold body 2B is extended from the other side. By sliding the movable scaffold body 2B to the other side in this way, maintenance can be performed over a wide range below the bridge 101.

  As shown in FIG. 19, the distance between the left and right body frames 4, 4 of the movement support device 3 is made larger than the distance between the bridge piers 102, 102, and the scaffold body 2 from the height position in FIG. 19. The left and right main body frames 4 and 4 are moved to the center side by the frame drive mechanisms 5 and 5 in the state where the collar portion 103 is lifted up to a position where the flange 103 comes between the driven wheel 6 and the drive wheel 7. As shown in FIG. 20, the scaffold body 2 is suspended from the bridge 101 with the flange 103 sandwiched between the driven wheel 6 and the drive wheel 7.

  In addition, the driven wheel 6 and the driving wheel 7 that can move in the left-right direction (width direction) of the bridge 101 and the movable scaffold body 2B slide, so that it can be installed suspended from the bridge to the bottom of the bridge. The main body 2B is used as a counterweight, and a dedicated counterweight is unnecessary or small.

  Thus, in this embodiment, corresponding to claim 2, the scaffold body 2 includes a fixed scaffold body 2A, a movable scaffold body 2B that can slide in the length direction of the fixed scaffold body 2A, and the movable scaffold body. 2B is provided with a motor 67 which is a driving means for slidingly driving the 2B with respect to the fixed scaffold main body 2A. Therefore, the center of gravity of the scaffold main body 2 in the center side of the scaffold main body 2 can be extended with the movable scaffold main body 2B slid outward and the scaffold main body 2 extended. Lift the position. Since the movable scaffold body 2B protruding in this manner acts as a balance weight, a scaffold apparatus that is structurally useless can be obtained.

  In this case, the height of the suspended scaffold body 2 is lifted so that the collar 103 is between the driven wheel 6 and the drive wheel 7, and in this state, the left and right body frames 4, 4 are length of the scaffold body 2. The scaffold body 2 is suspended from the bridge 101 so as to sandwich the flange 103 between the driven wheel 6 and the drive wheel 7.

  In addition, with the driven wheel 6 positioned at the non-moving position, the driving wheel 7 is aligned under the flange 103, the driven wheel 6 is switched to the moving position, and the scaffold body 2 is suspended from the bridge 101. Good.

  In addition, since the movable scaffold body 2B can slide on both sides of the fixed scaffold body 2A, after being suspended on the bridge, the movable scaffold body 2B can be slid inward as shown in FIG. 20B. .

  As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to the said Example, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, various types of upper and lower rotational movement means can be used. For example, a rotating spherical type or a crawler type may be used. In addition, the moving drive means is not limited to that built in the drive wheel shown in the embodiment, and various means such as manual rotation using a handle for rotation operation or the like can be used. Furthermore, in the embodiment, one movable scaffold body is provided in the fixed scaffold body, but two or more movable scaffold bodies may be provided. In the embodiment, the main body frame is provided with a plurality of lower rotation moving means. However, the number of lower rotation moving means may be one or three or more. Furthermore, the lower rotation moving means only needs to be pressed under the collar so as not to slip with the collar during rotation. Furthermore, in the embodiment, the direction of the magnet is changed by the expansion / contraction means 51, but means for changing the direction of the magnet can also be appropriately selected.

It is a side view of the scaffold apparatus which shows Example 1 of this invention. It is a front view of a scaffold apparatus same as the above. It is sectional drawing of a scaffold main body upper part same as the above. FIG. 6 is a front view of the upper rotation moving means and the switching means in the moving position. FIG. 6 is a front view of the upper rotation moving means and the switching means in the non-moving position. It is a plane sectional view around the switching means. It is a side view around a lower rotational movement means same as the above. It is a side view of a downward rotation moving means same as the above. FIG. 6 is a cross-sectional view of the lower rotation moving means. It is an explanatory side view which shows the direction of the adsorption | suction force in the discontinuous part of a lower rotation moving means same as the above. It is an explanatory side view which shows the direction of the adsorption | suction force in the flat part of a lower rotation moving means same as the above. It is a front view of the scaffold apparatus which shows Example 2 of this invention. It is a side view of the scaffold apparatus which shows Example 3 of this invention. It is a side view of a scaffold apparatus same as the above. It is sectional drawing of the slide drive means which slide-drives a movable scaffold main body same as the above. It is a top view of the principal part of a slide drive means same as the above. It is a side view of the principal part of a slide drive means same as the above. It is a side view explaining on-site carrying of a scaffold apparatus same as the above. It is a side view explaining suspension work of a scaffold apparatus same as the above. It is a side view explaining the suspended state of a scaffold apparatus same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Scaffolding device 2 Scaffolding body 3 Movement support device 4 Body frame 5 Frame drive mechanism 6 Driven wheel (upper rotation moving means)
7 Drive wheel (lower rotational movement means)
26 Switching means 2A Fixed scaffold body 2B Movable scaffold body
61 Slide drive means
101 bridge
102 bridge girder
102A bridge girder
103

Claims (2)

A scaffold device comprising a working scaffold main body and a moving support device that is provided on the scaffold main body and moves while supporting the scaffold main body by suspending it on a brim part of a bridge. A plurality of upper rotational movement means that move on the part, a lower rotational movement means that is pressed or adsorbed under the collar part, and a switching means that switches the upper rotational movement means between a movement position on the collar part and a non-moving position. And the scaffold main body is moved by the rotational force of the lower rotational movement means with the buttocks sandwiched by the lower rotational movement means. The scaffold main body includes a fixed scaffold main body, a movable scaffold main body that is slidable in a length direction of the fixed scaffold main body, and a drive unit that slide-drives the movable scaffold main body with respect to the fixed scaffold main body. The scaffold device according to claim 1.

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