JP2020007786A - Mobile scaffold - Google Patents

Abstract

To provide a mobile scaffold allowing maintenance work to be performed easily as well as operation time to be reduced.SOLUTION: A mobile scaffold of the present invention is provided with: a carriage 1; a swing frame 2 swingably attached on the carriage 1; a guide supporting frame 5 attached on the swing frame 2, which can swing freely in a different direction from the swing frame 2; a pair of guide rails 3, 3 parallelly arranged on the guide supporting frame 5; securing devices J1, J2 securing each position of guide rails 3, 3; and a first lifting scaffold A1 and a second lifting scaffold A2 being movable along the guide rails 3, 3 and being liftable.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a movable scaffold which is suitable for use in construction, dismantling, and repair work of an inner wall of a railway or road tunnel, an inner wall of an oil tank or a dome-shaped construction section, and the like.

  In recent years, the inner walls of railway tunnels and highway tunnels have deteriorated over time during long-term use, and the inner walls have peeled off and metal fittings such as bolts have rusted. The maintenance work for the purpose is performed.

  Such maintenance work is performed using a movable scaffold mounted on a bogie that runs on a track in a railroad tunnel or on a road surface in a highway tunnel.

  As a movable scaffold that can be used for such maintenance work, a movable scaffold such as that disclosed in Patent Document 1 has been developed. This moving scaffold is equipped with a bogie that runs on a track, telescopic legs mounted on the bogie, and a work scaffold, and expands and contracts the telescopic legs according to the height of the maintenance location on the inner wall surface of the tunnel. Can be raised and lowered.

JP 2014-145160 A (Drawing, Abstract)

  In recent years, repairs have been made to cope with the deterioration of the inner wall of the tunnel by attaching a panel to the inner wall of the tunnel.

  When performing repair using such a panel, it is desired to further improve the following inconvenience with respect to the moving scaffold disclosed in Patent Document 1.

  Panels for repairing the inner wall of the tunnel are generally large and workers need to support both ends of the panels to attach the panels, but conventional moving scaffolds are mounted on trucks that run on tracks. Since only one workbench is mounted, if a panel is to be installed on the inner wall near the ceiling of the tunnel, it is necessary to install a temporary scaffold that enables work at a high place in addition to the movable scaffold.

  As described above, when the conventional mobile scaffold cannot perform maintenance work by itself, it requires troublesome assembling and disassembling of the temporary scaffolding, so that the maintenance work is troublesome and requires a large amount of time. Was.

  Therefore, an object of the present invention is to provide a moving scaffold capable of facilitating maintenance work and reducing time.

  In order to achieve the above object, the moving scaffold of the present invention comprises a truck, a swing frame swingably mounted on the truck, and a guide support frame swingably mounted on the swing frame in a direction different from the swing frame. A pair of guide rails mounted in parallel on a guide support frame, a fixing device for fixing the posture of each guide rail, a first lifting and lowering scaffold movable along the guide rail and capable of moving up and down. And a lifting platform.

  The swing frame is attached to the bogie so as to be swingable in the front-rear direction or the left-right direction. The guide support frame is attached to the swing frame so as to be swingable in either the front-rear direction or the left-right direction of the swing frame. In addition, the guide rail may be attached to the guide support frame along the left-right direction with respect to the traveling direction of the bogie.

  Further, the fixing device is interposed between the bogie and the swing frame, and a first jack capable of swinging and fixing the swing frame with respect to the bogie, and interposed between the swing frame and the guide support frame. A second jack capable of swinging and fixing the guide support frame with respect to the swing frame may be provided.

  In addition, the guide rail may include a channel-shaped outer rail connected to the bogie, and a pair of inner rails movably inserted into left and right inner sides of the outer rail.

  The first climbing scaffold and the second climbing scaffold may include a traveling frame that travels on a guide rail, a scaffold, and an elevator having a scissor link interposed between the traveling frame and the scaffold. Good.

  The traveling frame includes a rectangular main body frame, four wheels provided at four corners of the main body frame and capable of running on guide rails, and a pair of wheel drives for connecting front and rear left and right wheels to the guide rail. The vehicle may include a shaft, a speed reducer that transmits rotational power to each wheel drive shaft, and a handle connected to the speed reducer and that inputs external rotational power to the speed reducer.

  Furthermore, the elevator lifts the scissor link, the link mounting frame to be attached to the traveling frame, a bracket for pivotally supporting one of the proximal ends of the scissor link to the link mounting frame, and pivotally supporting the other of the proximal ends of the scissor link. A connection frame slidably attached to the link attachment frame, a screw rod rotatably screwed to the connection frame, and a motor capable of rotating the screw rod may be provided. Further, the moving scaffold may be provided with outriggers at both ends of the guide rail.

  ADVANTAGE OF THE INVENTION According to the moving scaffold of this invention, while a maintenance operation | work becomes easy, an operation time can also be shortened.

It is a front view which can be raised and lowered freely according to one embodiment of the present invention. It is a right view similarly. (A) is a front view of a base unit portion, (B) is a plan view, and (C) is a side view. It is a perspective view of a base unit part. (A) is a top view of a 1st jack part, (B) is a front view. FIG. 4 is a partially cutaway perspective view showing a state in which a traveling frame and a link mounting frame are mounted on a rail so as to overlap with each other. FIG. 3 is an exploded perspective view of a traveling frame and a link attachment frame. (A) is a plan view of the traveling frame, and (B) is a front view. (A) is a cross-sectional plan view of a wheel housing provided with a fall prevention flange, (B) is a side view, and (C) is a front view. FIG. 4 is a plan view of a link mounting frame incorporating a link drive mechanism.

  An embodiment of the present invention will be described below with reference to FIGS. Although the moving scaffold according to the present embodiment is described as being used for maintenance work such as inspection work and repair work of a tunnel inner wall in a railway, repair work in a tunnel on an expressway, inspection work, or a dome-shaped structure Needless to say, it can be used for interior wall construction.

  In the present embodiment, the wheels S of the bogie 1 travel on the track L because they are moving scaffolds used for maintenance work in a tunnel. The wheels of the truck 1 in the above may be those suitable for traveling on a road surface.

  Hereinafter, the moving scaffold will be described in detail. A movable scaffold P according to an embodiment of the present invention includes a truck 1 traveling on a track L, a swing frame 2 swingably mounted on the truck 1, and a guide support swingably mounted on the swing frame 2. Frame 5, two parallel rails 3, 3 mounted on the guide support frame 5, outriggers 4, 4 as fixing devices provided on both sides of each guide rail 3, 3, and guide rails 3, 3. A first ascending and descending scaffold A1 and a second ascending and descending scaffold A2 that can move along and can ascend and descend are provided.

  As shown in FIG. 3, the cart 1 includes a rectangular cart frame 6 and a pair of wheels S, S rotatably mounted on both left and right sides of the cart frame 6, and can run on the track L. The bogie frame 6 includes a rectangular main body frame 6a and a pair of beam members 6b spanning the main body frame 6a. The carriage 1 may include a drive source that can rotationally drive the wheels S, S so that the carriage 1 can run on its own.

  As shown in FIG. 3, a base unit BU including the swing frame 2, the guide support frame 5, the guide rails 3, 3, and the outriggers 4, 4 is mounted above the bogie frame 6.

  The swing frame 2 has a rectangular frame 2a, and is attached to the carriage 1 so as to be swingable in the left-right direction with respect to the traveling direction of the carriage 1, as shown in FIG. . More specifically, the swing frame 2 is hingedly connected to the beam 6b of the bogie frame 6 via first brackets B1 provided at the center of both front and rear sides, and is swingably mounted along the left-right direction of the bogie 1. I have. That is, the swing frame 2 is capable of swinging in the left-right direction of the bogie 1 around an axis along the traveling direction of the bogie 1 as a center.

  Also, first jacks J1 are interposed at four places between the front and rear, right and left of the frame 2a of the swing frame 2, and the main body frame 6a of the bogie 1, respectively. The first jack J1 has a screw shaft attached to the main body frame 6a so as to be swingable in the left-right direction of the bogie 1, a nut screwed to the screw shaft, and a nut rotatable and swingable around the shaft. And a bracket B4 for connecting the holding nut to the frame 2a of the swing frame 2. Therefore, as shown in FIG. 5B, when the nut is rotated with respect to the screw shaft, the distance between the swing fulcrum of the screw shaft and the nut changes due to the necessity of the feed screw mechanism, and the swing frame 2 is moved to the second position. The swing frame 2 can be swung in the left-right direction with respect to the carriage 1 about the hinge connection point of one bracket B1, and the posture of the swing frame 2 can be fixed at a desired position. The first jack J1 may be interposed between the bogie 1 and the swing frame 2 by attaching the screw shaft to the bogie 1 and the nut and the bracket B4 to the swing frame 2.

  Further, above the swing frame 2, a guide support frame 5 is attached to the swing frame 2 so as to be swingable in a direction orthogonal to the swing direction. The guide support frame 5 has a rectangular frame body 5a. As shown in FIG. 4, the guide support frame 5 is provided on the swing frame 2 so as to be swingable with respect to the swing frame 2 in the front-rear direction of the swing frame 2. Installed. More specifically, the guide support frame 5 is hingedly connected to the frame 2a of the swing frame 2 via a second bracket B2 provided at the center of both the front and rear sides, and is swingably mounted along the front and rear direction of the swing frame 2. Have been. That is, the guide support frame 5 is swingable in the front-rear direction of the swing frame 2 around an axis along a direction orthogonal to the swing direction of the swing frame 2. The guide support frame 5 may be attached to the swing frame 2 so as to be swingable in a direction different from the swing direction of the swing frame 2.

  In addition, second jacks J2 are interposed at four positions between the front and rear, right and left of the frame 5a of the guide support frame 5, and the frame 2a of the swing frame 2, respectively. These second jacks J2 include a screw shaft attached to the frame body 5a so as to be swingable in the front-rear direction of the guide support frame 5, a nut screwed to the screw shaft, and a nut rotatable and swingable around the shaft. And a bracket B3 for connecting a nut that can be held to the frame 2a of the swing frame 2. Therefore, when the nut is rotated with respect to the screw shaft, the distance between the swing fulcrum of the screw shaft and the nut changes due to the necessity of the feed screw mechanism, and the guide support frame 5 is centered on the hinge connection point of the second bracket B2. In addition, the guide frame 5 can be swung in the front-rear direction with respect to the swing frame 2, and the posture of the guide support frame 5 can be fixed at a desired position. Note that the screw shaft may be attached to the swing frame 2, the nut and the bracket B3 may be attached to the guide support frame 5, and the second jack J2 may be interposed between the swing frame 2 and the guide support frame 5.

  As shown in FIG. 4, a pair of guide rails 3, 3 are arranged on the frame 5 a of the guide support frame 5 parallel to each other on the guide support frame 5 along the left-right direction with respect to the traveling direction of the carriage 1. Attached. Each of the guide rails 3, 3 is composed of a channel-shaped outer rail 3A and inner rails 3B, 3B movably inserted into the inner circumferences on both the left and right sides of the outer rail 3A. In FIG. 4, for easy understanding of the structure of the other parts, the guide rail 3 described on the near side in the figure is omitted from the middle.

  As described above, the guide rail 3 is constituted by the outer rail 3A and the pair of inner rails 3B, 3B. If necessary, the inner rails 3B, 3B can be protruded from the outer rail 3A or can be inserted into the outer rail 3A. It can be stored. In the case of the present embodiment, the length of the outer rail 3A in the left-right direction does not interfere with the train running on the adjacent track, and when the moving scaffold is moved along the track L, the inner rail has an inner length. If the rails 3B, 3B are accommodated to the maximum extent in the outer rail 3A, they can travel freely even in a narrow tunnel, and do not hinder the steering of a train running on the adjacent track L.

  An outrigger 4 is provided at the tip of the inner rail 3B in each of the guide rails 3, 3. The outrigger 4 includes a bracket 4C attached to the end of the inner rail 3B, a column 4A having a hole that can be slidably attached to the bracket 4C in a vertical direction, and a swivel jack that is telescopically attached to the lower end of the column 4A. 4B. Therefore, the outrigger 4 can fix the support | pillar 4A to the bracket 4C in an arbitrary position, can adjust a full length step by step, and can fine-tune the full length with the swivel jack 4B.

  When the outrigger 4 is expanded and contracted and touches the ground on both sides of the track L, the weight balance in the left and right direction is biased depending on the arrangement of the first lifting scaffold A1 and the second lifting scaffold A2 moving on the guide rails 3, 3. However, the movable scaffold can be prevented from falling down, and the operator can safely perform maintenance work.

  When the truck 1 is stopped on the track L laid on a slope inclined in the front-rear direction, which is the traveling direction, or on the track L laid on a slope inclined in the left-right direction, the first jack J1 and the second jack J2 are used. By operating the jack J2 and adjusting the posture of the swing frame 2 and the guide support frame 5 according to the inclination, the guide rails 3, 3 can be maintained in a horizontal posture.

  For example, when stopping the bogie 1 on the track L laid on the slope declining to the left, the bracket B4 (see FIG. 5) of the two first jacks J1 on the left is raised while the two first jacks J1 on the right are raised. When the bracket B4 is lowered, the swing frame 2 swings around the first bracket B1 as a fulcrum, and the guide rail 3 can be fixed in a horizontal posture.

  Similarly, when the bogie 1 is to be stopped on the track L laid on a slope inclined forward in the traveling direction, the screw shafts of the two front jacks J2 are raised, and the two rear jacks J2 of the rear two jacks J2 are raised. When the screw shaft is lowered, the guide support frame 5 swings around the second bracket to fix the guide rail 3 in a horizontal posture.

  When the truck 1 is stopped on the track L laid on an inclined slope that is combined in the front, rear, left and right directions of travel, the swing frame 2 is operated by operating the first jack J1 and the second jack J2 according to the inclination. Then, the guide rails 3 and 3 may be fixed in a horizontal posture by swinging the guide support frame 5.

  As described above, the first jack J1 and the second jack J2 constitute a fixing device, and can swing and fix the swing frame 2 and the guide support frame 5, whereby the guide rails 3, 3 can be fixed. The posture can be adjusted and fixed.

  Each of the first climbing scaffold A1 and the second climbing scaffold A2 includes a traveling frame 7, a scaffold stand 24, and an elevator having a scissor link 9 interposed between the traveling frame 7 and the scaffold stand 24. I have. The first lifting and lowering scaffold A1 runs on the inner rail 3B disposed on the right side of the guide rails 3 and 3 in FIG. 1, and the second lifting and lowering scaffold A2 is disposed on the left side of the guide rails 3 and 3 in FIG. The vehicle runs on the inner rail 3B. Therefore, the first lifting scaffold A1 can move in the left-right direction in FIG. 1 by traveling on the right inner rail 3B in FIG. 1, and the second lifting scaffold A2 travels on the left inner rail 3B in FIG. By doing so, it is possible to move in the left-right direction in FIG. Furthermore, since the inner rail 3B can move in the left-right direction in FIG. 1 with respect to the outer rail 3A, even if the inner rail 3B is moved with respect to the outer rail 3A, the first elevating scaffold A1 and the second elevating scaffold A2 are It can move in the left-right direction in FIG.

  As shown in FIGS. 7 and 8, the traveling frame 7 includes a rectangular main body frame 7 a, four wheels 11 provided at four corners of the main body frame 7 a and running on the inner rail 3 </ b> B of the guide rails 3, 3. A wheel drive shaft 14 for connecting the front left and right wheels 11, 11 and a rear left and right wheel 11, 11 with respect to the traveling direction of the frame 7, a speed reducer 16 for transmitting rotational power to each wheel drive shaft 14, A handle H that is connected to the speed reducer 16 and inputs rotational power from the outside to the speed reducer 16;

  Although not shown, at the center of each wheel drive shaft 14, there is provided a gear box 18 having a bevel gear connected to the wheel drive shaft 14 and a drive-side bevel gear meshing with the bevel gear. ing. The drive-side bevel gears of the gearboxes 18 are connected to the output shaft of the speed reducer 16 via the main drive shaft 13.

  Although not shown in detail, the speed reducer 16 includes a worm connected to the input shaft and a worm wheel meshing with the worm and connected to the output shaft. The output shaft is connected to the main drive shaft 13. ing. The input shaft of the speed reducer 16 is connected to the handle shaft 12, and the tip of the handle shaft 12 projects to the side of the main body frame 7a, and the handle H is attached to the tip.

  Therefore, when the operator rotates the handle H, the rotational power is transmitted to the wheel drive shafts 14 via the speed reducer 16 and the wheels 11 are rotated. As a result, the traveling frame 7 can travel on the guide rails 3 and 3 and passes through the speed reducer 16, so that the operator moves the heavy lifting first and second lifting platforms A1 and A2 with a small force. The burden on the worker can be reduced. In addition, since all the wheels 11 can be driven by one handle operation, the first ascending and descending scaffold A1 and the second ascending and descending scaffold A2 can be reliably moved along the guide rails 3, 3.

  The specific structure for moving the first lifting and lowering scaffold A1 and the second lifting and lowering scaffold A2 is not limited to the above, and may be moved using an actuator such as a motor.

  The wheel 11 is housed in a housing 10 as shown in FIG. 9, and an end of the housing 10 is provided with a flange 15 for preventing overturning. As shown in FIGS. 7 and 9, the flange 15 is formed of a plate having an L-shaped cross section that protrudes on both sides of the rail 3, and the first ascending and descending scaffold A1 and the second ascending and descending scaffold A2 move on the guide rails 3 and 3. When moving, the wheels 11 are prevented from coming off the guide rails 3.

  Subsequently, the elevator includes a scissor link 9, a link mounting frame 8 to be attached to the traveling frame 7, a bracket 20A for pivotally supporting one of the base ends of the scissor link 9 and fixing to the link mounting frame 8, and a scissor link 9 A connection frame 19 that supports the other of the base ends and is slidably mounted on the link mounting frame 8; a screw rod 17 rotatably screwed to the connection frame 19; and a motor that can rotationally drive the screw rod 17 M.

  As shown in FIGS. 1 and 2, the scissor link 9 has a structure in which links 9A and 9b hinged to each other at the center are stacked in multiple stages by hinge connection, and the base ends of the lowermost links 9A and 9B. Are extended, and conversely, when the base ends of the lowermost links 9A, 9B are separated from each other, they contract.

  Next, as shown in FIGS. 7 and 10, the link attachment frame 8 is formed in a rectangular frame, and a bracket 20A that supports the base end of one link 9A is attached. The base end of the other link 9B is connected to the connection frame 19 via a connection member 20 having a flange-shaped bracket 21 and a shaft 22 attached to the bracket 21. The connecting frame 19 is slidably inserted in the link mounting frame 8 in the left-right direction in FIG. 10 and includes a nut (not shown) with which the screw rod 17 is screwed. At the end of the scissors link 9, a scaffold stand 24 composed of a scaffold plate 24A, a baseboard and a handrail 24B is attached.

  A beam member 23 that rotatably supports the pair of screw rods 17 is bridged in the link mounting frame 8, and each screw rod 17 is attached to the beam member 23 in the present embodiment. The motor M is connected to the motor M via a speed reducer 29, and is rotated and driven synchronously by the motor M.

  Therefore, when the motor M is driven to rotate forward, the pair of screw rods 17 and 17 rotate synchronously, and the connecting frame 19 is pulled to the position shown by the dotted line, for example, in the manner of a feed screw. As a result, the base ends of the links 9A and 9B are pulled horizontally, and the scissor link 9 extends from the dotted line position to the solid line position as shown in FIG. Conversely, when the motor M is driven in the reverse direction, the connecting frame 19 is separated from the beam member 23, so that the scissor link 9 can be contracted and the scaffold stand 24 can be lowered. Therefore, since the scaffolding base 24 can be moved up and down by driving the motor M, the burden on the operator is reduced. The screw rod 17 is protected by the bellows-shaped dust boot 25 because if exposed, the movement of the screw rod 17 may be reduced due to the adhesion of dust, or it may rust due to the adhesion of water. Further, since the screw rod 17 is covered with the dust boot 25, it is possible to prevent the worker from accidentally touching the screw rod 17 being driven, so that the safety of the worker is achieved. In the drawing, the dust boot 25 is omitted from one of the screw rods 17 for easy understanding.

  As described above, the moving scaffold of the present invention comprises a cart 1, a swing frame 2 swingably mounted on the cart 1, and a guide support frame 5 swingably mounted on the swing frame 2 in a direction different from that of the swing frame 2. A pair of guide rails 3, 3 mounted in parallel on the guide support frame 5, first and second jacks (fixing devices) J1, J2 for fixing the posture of each guide rail 3, 3, and a guide. It has a first ascending and descending scaffold A1 and a second ascending and descending scaffold A1 that can move along the rails 3 and 3 and that can move up and down.

  Since the mobile scaffold thus configured includes the first climbing and descending scaffold A1 and the second climbing and scaffolding A1 moving on the guide rails 3, 3, the repair work for attaching the panel to the inner wall surface near the ceiling of the tunnel is performed. When performing the above, the workers appearing on the two elevating and lowering scaffolds A1 and A2 can work while supporting the panels while keeping the level of the scaffolding, so that there is no need to install a temporary scaffolding other than the moving scaffolding. Therefore, according to the moving scaffold of the present invention, the maintenance work becomes easy and the work time can be shortened.

  In addition, according to the moving scaffold, since there are two lifting scaffolds, the first and second lifting scaffolds A1 and A2 are used to separate the inner wall of the tunnel in addition to the panel installation work on the inner wall. In addition, the construction, repair, reinforcement, and inspection work of the side wall can be performed at the same time, thereby speeding up the work. Further, the first lifting and lowering scaffold A1 and the second lifting and lowering scaffold A2 do not require a mechanism for independently maintaining the scaffold plate 24A, so that the entire apparatus is inexpensive.

  Furthermore, since the first climbing scaffold A1 and the second climbing scaffold A2 can move along the guide rails 3, 3, the first climbing scaffold A1 and the second climbing scaffold A2 are set to arbitrary heights. In this state, it can be approached to the construction site on the side wall.

  In the moving scaffold of the present embodiment, the guide support frame 5 can swing in a direction different from that of the swing frame 2, and the swing frame 2 can swing in the front-rear direction or the left-right direction with respect to the bogie 1. The guide support frame 5 is swingably attached to the swing frame 2 in one of the front-rear direction and the left-right direction of the swing frame 2, and the guide rails 3, 3 are attached to the traveling direction of the carriage 1. Are attached to the guide support frame 5 along the left-right direction. That is, the swing directions of the swing frame 2 and the guide support frame 5 are orthogonal to each other, and the guide rails 3 and 3 are attached along one swing direction of the swing frame 2 or the guide support frame 5. Therefore, there is an advantage that the guide rails 3 and 3 can be easily leveled when the carriage 1 is stopped on the slope, and the work load is reduced.

  In the present embodiment, the fixing device includes a first jack J1 interposed between the carriage 1 and the swing frame 2 to swing and fix the swing frame 2 with respect to the carriage 1; A second jack J2 interposed between the swing frame 2 and the guide support frame 5 for swinging and fixing the guide support frame 5 to the swing frame 2. In the moving scaffold configured as described above, the swing and fixation of the swing frame 2 can be performed at the same time, and the swing and fixation of the guide support frame 5 can be performed at the same time. In the above description, the fixing device is constituted by the first jack J1 and the second jack J2 each including a screw shaft and a nut. However, the fixing device is constituted by a hydraulic jack, a hydraulic cylinder, an electric cylinder, or the like. May be done.

  Further, in the present embodiment, the guide rails 3, 3 are a channel-shaped outer rail 3A connected to the carriage 1, and a pair of inner rails movably inserted into the left and right inner sides of the outer rail 3A. 3B, 3B. According to the moving scaffold configured as described above, when the moving scaffold is moved, the inner rails 3B, 3B are accommodated in the outer rail 3A to make the width in the left-right direction compact, so that the traveling vehicle in the narrow tunnel or the adjacent track L can be moved. It can be moved without disturbing, and can be used for maintenance work on the inner wall of a wide tunnel by increasing the width in the left-right direction during maintenance work.

  Further, the first lifting and lowering scaffold A1 and the second lifting and lowering scaffold A2 are provided with a traveling frame 7 traveling on the guide rails 3 and 3, a scaffold 24, and a scissor link interposed between the traveling frame 7 and the scaffold 24. Since the elevator having the lift 9 is provided, the total height can be made very low during contraction and the total height can be made very high during extension, so that not only work at a high place but also work at a low place is possible.

  Further, in the moving scaffold of the present embodiment, the traveling frame 7 includes a rectangular body frame 7a, four wheels 11 provided at four corners of the body frame 7a and capable of traveling on the guide rails 3 and 3, and the guide rail 3 , 3, a pair of wheel drive shafts 14 connecting front and rear left and right wheels, a speed reducer 16 transmitting rotational power to each wheel drive shaft 14, and an external rotation connected to the speed reducer 16. A handle H for inputting power to the speed reducer 16; According to the moving scaffold configured in this manner, the worker can move the first lifting and lowering scaffold A1 and the second lifting and lowering scaffold A2, which are heavy objects, with a small force. Since it can be driven by one handle operation, the first lifting and lowering platform A1 and the second lifting and lowering platform A2 can be reliably moved along the guide rails 3, 3.

  In the moving scaffold of the present embodiment, the elevator is fixed to the link mounting frame 8 by pivotally supporting one of the scissor link 9, the link mounting frame 8 to be mounted on the traveling frame 7, and the base end of the scissor link 9. A bracket 20A, a connecting frame 19 that pivotally supports the other end of the base end of the scissor link 9 and is slidably mounted on the link mounting frame 8, and a pair of screw rods 17 rotatably screwed to the connecting frame 19; 17 and a motor M capable of driving the screw rods 17 and 17 to rotate. According to the moving scaffold configured as described above, the connecting frame 19 that expands and contracts the scissor link 9 moves in parallel by the pair of screw rods 17, so that the scissor link 9 can smoothly expand and contract.

  In the moving scaffold of the present embodiment, the outriggers are provided at both ends of the guide rails, so that the right and left scaffolds A1 and A2 moving on the guide rails 3 and 3 may be left or right depending on the arrangement state. Even if there is a bias in the weight balance in the direction, the movable scaffold can be prevented from overturning, and the operator can safely perform maintenance work.

  In the present embodiment, the guide rails 3 and 3 are provided along the left and right directions with respect to the carriage 1 and cannot swing with respect to the carriage 1. Alternatively, a turning table may be provided between the guide support frame 5 and the guide rails 3 to allow the guide rails 3 to turn.

DESCRIPTION OF SYMBOLS 1 ... Dolly, 2 ... Swing frame, 3 ... Guide rail, 3A ... Outer rail, 3B ... Inner rail, 4 ... Outrigger, 5 ... Guide support frame, 7 ..Travel rail, 7a body frame, 8 link mounting frame, 9 scissor link, 11 wheels, 14 wheel drive shaft, 16 reducer, 17 ..Screw rod, 19 ... Connection frame, 20A ... Bracket, 24 ... Scaffold stand, A1 ... First elevating scaffold, A2 ... Second elevating scaffold, H ... Steering wheel, J1 ... First jack (fixing device), J2 ... Second jack (fixing device), M ... Motor

Claims (8)

A trolley,
A swing frame swingably mounted on the carriage,
A guide support frame mounted on the swing frame so as to swing freely in a direction different from the swing frame;
A pair of parallel guide rails mounted on the guide support frame,
A fixing device for fixing the posture of the guide rail,
An ascending / descending movable scaffold comprising a first ascending / descending scaffold and a second ascending / descending scaffold movable along the guide rail and capable of ascending and descending. The swing frame is attached to the carriage so as to be swingable in the front-rear direction or the left-right direction,
The guide support frame is attached to the swing frame so as to be swingable in either the front-rear direction or the left-right direction of the swing frame,
The movable scaffold according to claim 1, wherein the guide rail is attached to the guide support frame along a left-right direction with respect to a traveling direction of the bogie. The fixing device,
A first jack that is interposed between the bogie and the swing frame and that can swing and fix the swing frame with respect to the bogie,
3. A second jack interposed between the swing frame and the guide support frame, the second jack being capable of swinging and fixing the guide support frame with respect to the swing frame. 4. The moving scaffold described in. The above guide rail is
A channel-shaped outer rail connected to the cart,
The movable scaffold according to any one of claims 1 to 3, further comprising a pair of inner rails movably inserted into left and right inner sides of the outer rail, respectively. The first climbing scaffold and the second climbing scaffold are
A traveling frame that travels on the guide rail,
Scaffold stand,
The moving scaffold according to any one of claims 1 to 4, further comprising an elevator having a scissor link interposed between the traveling frame and the scaffold. The traveling frame is
A rectangular body frame,
Four wheels provided at four corners of the main body frame and capable of traveling on the guide rail,
A pair of wheel drive shafts for connecting the front and rear left and right wheels to the guide rail,
A speed reducer that transmits rotational power to each wheel drive shaft,
The movable scaffold according to claim 5, further comprising: a handle connected to the speed reducer and configured to input external rotational power to the speed reducer. The elevator,
With the above scissors link,
A link attachment frame attached to the traveling frame,
A bracket for pivotally supporting one of the base ends of the scissor link and fixing to the link mounting frame;
A connecting frame that supports the other of the base ends of the scissor links and that is slidably mounted on the link mounting frame;
A screw rod rotatably screwed to the connection frame;
The moving scaffold according to claim 5, further comprising: a motor capable of driving the screw rod to rotate. The movable scaffold according to any one of claims 1 to 7, wherein outriggers are provided at both ends of the guide rail.

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