Lifting device

Abstract

To provide a lifting apparatus capable of improving working efficiency and of saving manpower when performing various works using the lifting apparatus together with a moving body.SOLUTION: A base 12 of a lifting apparatus 10 is provided with two clamps 20 connected in a disengageable manner to a vehicle 1 for high lift work, and the lifting apparatus 10 can move following the vehicle 1 for high lift work while connected to the vehicle 1 for high lift work. The clamps 20 are respectively provided on the other ends 14B of a pair of first frame members 14 away from the points connected by a second frame member 18 and provided on the tip of the base 12. The moving direction of the vehicle 1 for high lift work and the extending direction of the second frame members 18 match while the lifting apparatus 10 is connected to the vehicle 1 for high lift work by the clamps 20.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a lifting device.

Background Art

[0002] Conventionally, a lifting device (lifter) has been known that includes a base supported by a plurality of swivel wheels for traveling and a lifting mechanism that is erected on the base and supports a load platform so as to be able to move up and down. The lifting device is moved to a desired work location by an operator pushing it by hand, and a load is placed on the load platform and lifted or lowered. For example, it is used to place loads such as capital equipment on the load platform and transport them at a construction site or a warehouse, or for lifting and lowering operations of loads (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Here, when using the above-described lifting device in combination with an aerial work platform to perform various operations, the lifting device is placed next to the aerial work platform, and by raising and lowering the load platform, workers on the aerial work platform can perform loading and unloading. And when moving the work location, the lifting device must also be moved along with the movement of the aerial work platform. In this case, after the operator operates the aerial work platform to move to the next work location, the operator has to get off the aerial work platform once, move the lifting device to the aerial work platform that has been moved by pushing it by hand, and then get on the aerial work platform again to perform the work. Therefore, it took time to move the lifting device, and the work efficiency was reduced. On the other hand, it is conceivable that a worker other than the worker riding on the aerial work vehicle moves to the aerial work vehicle with the lifting device moved, so that the worker does not have to get off the aerial work vehicle once, and the time required for moving the lifting device can be shortened. However, in this case, other workers are required every time it moves.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to provide a lifting device that improves work efficiency and achieves labor saving when performing various operations by using a lifting device in combination with a moving body.

Means for Solving the Problems

[0006] In order to achieve the above-described object, an embodiment of the present invention is a lifting device including a base supported by a plurality of swivel wheels and a lifting mechanism erected on the base for supporting a loading platform so as to be able to move up and down, which is detachably connected to a moving body, and a connecting member is provided on the base so that the lifting device can travel following the moving body in a state of being connected to the moving body. Moreover, an embodiment of the present invention is characterized in that a plurality of the connecting members are provided on the base. Moreover, an embodiment of the present invention is configured to include a pair of first frame members that face each other and linearly extend in the horizontal direction, and a second frame member that connects a location near one end of both ends in the longitudinal direction of the pair of first frame members, and the connecting members are respectively provided at the other ends of the pair of first frame members away from the location connected by the second frame member. Moreover, an embodiment of the present invention is characterized in that, in a state where the connecting member is connected to the moving body, the moving direction of the moving body coincides with the extending direction of the second frame member. In addition, in one embodiment of the present invention, the elevating mechanism is provided to stand up from the second frame member, the elevating mechanism has a front facing the longitudinal ends of a pair of first frame members provided with the connecting member, and the loading platform is elevated above the pair of first frame members at the front of the elevating mechanism. In addition, in one embodiment of the present invention, the loading platform includes a fork having a pair of arm portions that extend and are elevated along the extending direction of the pair of first frame members, and a slide member provided between the pair of arm portions, being slidable in the extending direction of the pair of arm portions and having an upper surface at the same height as the upper surfaces of the pair of arm portions. In addition, in one embodiment of the present invention, any one of an X-axis table slidable in a direction orthogonal to the extending direction of the pair of arm portions, an XY-axis table slidable in the extending direction of the pair of arm portions and in a direction orthogonal to the extending direction thereof, a swivel table rotatable about a vertical axis, a housing member having a depth capable of housing a load therein, and a leaning member capable of leaning and placing a plate-shaped load is selectively detachably provided on the slide member. In addition, in one embodiment of the present invention, the moving body is an aerial work vehicle having a frame, and the connecting member is a clamp detachably connected to the lower part of the frame. In addition, in one embodiment of the present invention, the moving body is a belt or a wire arranged to be able to travel on the floor, and the connecting member is a clamp detachably connected to the belt or the wire.

Effects of the Invention

[0007] According to an embodiment of the present invention, a connecting member detachably connected to a moving body is provided on a base of a lifting device, and the lifting device can travel following the moving body in a state where the lifting device is connected to the moving body. For this reason, in various operations using the moving body and the lifting device simultaneously, it is not necessary for an operator to move the lifting device, and another operator for moving the lifting device is also unnecessary. Therefore, it is advantageous in improving work efficiency by shortening the time required for the movement of the operator and in achieving labor saving. Moreover, when a plurality of connecting members are provided on the base, since the lifting device is connected to the moving body at a plurality of locations, it is advantageous in suppressing the inclination of the lifting device and stably moving the lifting device when moving the lifting device following the moving body. Further, when the connecting members are respectively provided at the other ends of a pair of first frame members away from the location where the connecting members are connected by the second frame member, it is advantageous in easily connecting the lifting device to the moving body. Also, when the moving direction of the moving body is made to coincide with the extending direction of the second frame member in a state where the connecting member is connected to the moving body, it is advantageous in moving the lifting device following the moving body in a stable state. Furthermore, when the lifting mechanism is provided standing up from the second frame member, has a front facing the longitudinal ends of the pair of first frame members provided with the connecting members, and the loading platform is lifted above the pair of first frame members in front of the lifting mechanism, the loading platform will move up and down along the moving body in a state where the lifting device is connected to the moving body. Therefore, the operator can easily transfer the load between the moving body and the loading platform of the lifting device, which is advantageous in increasing the work efficiency. In addition, when configured to include a fork having a pair of arm portions extending and lifted along the extending direction of the pair of first frame members, and a slide member provided between the pair of arm portions, slidable in the extending direction of the pair of arm portions, and having an upper surface at the same height as the upper surfaces of the pair of arm portions, the load placed on the loading platform can be slid in the extending direction of the pair of first frame members, and the load can be easily transferred between the load and the lifting device. Further, on the slide member, an X-axis table slidable in a direction orthogonal to the extending direction of the pair of arm portions, an XY-axis table slidable in the extending direction of the pair of arm portions and in a direction orthogonal to the extending direction thereof, a swivel table rotatable about a vertical axis, a storage member having a depth capable of accommodating a load therein, and a leaning member on which a plate-shaped load can be leaned and placed are selectively and detachably provided. This makes it possible to select a loading platform according to the load, which is advantageous for stabilizing the load when raising and lowering the loading platform. Also, in the case where the moving body is an aerial work platform having a frame, and the connecting member is constituted by a clamp detachably connected to the lower part of the frame, the connection work of the lifting device to the aerial work platform can be easily performed, which is advantageous for improving the work efficiency of various operations using the aerial work platform and the lifting device simultaneously. Also, in the case where the moving body is a belt or a wire arranged to be able to travel on the floor, and the connecting member is constituted by a clamp detachably connected to the belt or the wire, the lifting device can be easily moved to the work place, and the load can be lifted and lowered by the lifting device at the moving destination, which is advantageous for improving the work efficiency and achieving labor saving.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Mode for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The lifting device according to the present embodiment is used, for example, at a construction site or a warehouse to load and transport goods such as capital equipment and materials on a loading platform, or for lifting operations of goods. The lifting device (lifter) 10 of the present embodiment is configured to be usable in combination with an aerial work platform 1 as a moving body (see FIG. 11). As shown in FIG. 1, in the present embodiment, the symbol FR represents the front direction of the lifting device 10, the symbol RR represents the rear direction of the lifting device 10, the symbol L represents the left direction of the lifting device 10, and the symbol R represents the right direction of the lifting device 10.

[0010] As shown in FIG. 11, the aerial work platform 1 includes traveling wheels 2, a drive source such as a traveling motor or engine for driving the traveling wheels 2, a vehicle body 3 provided with a power battery, etc., a lifting mechanism 4 including a scissor link and a hydraulic mechanism for operating the scissor link on the vehicle body 3, and a work platform 5 lifted by the lifting mechanism 4. The workbench 5 is provided with a protective fence 6, which prevents workers, luggage, etc. on the workbench 5 from falling. Near the upper end of the protective fence 6, an operation panel (not shown) is provided, and by operating the operation member on this operation panel, it is configured to be able to command various operations such as the traveling, steering of the aerial work platform 1, and the raising and lowering of the workbench 5. The frame of the aerial work platform 1 is composed of a vehicle body 3 and a pipe material F provided below the vehicle body 3.

[0011] As shown in FIGS. 1 to 4, the lifting device 10 includes a base 12 and a lifting mechanism 30 erected on the base 12. The base 12 includes a pair of first frame members 14, a plurality of swivel wheels (swivel casters) 16, a second frame member 18, a clamp (connecting member) 20, and transport wheels 28.

[0012] The pair of first frame members 14 are metal rod-shaped members with a rectangular cross-section and are hollow, and extend linearly in the horizontal direction facing each other. In the present embodiment, the pair of first frame members 14 are provided so as to extend in the front-rear direction of the lifting device 10. The pair of first frame members 14 are provided with swivel wheels 16 at the lower parts of both ends thereof. That is, in the present embodiment, four swivel wheels 16 are provided. Since the swivel wheels 16 are supported rotatably about a vertical axis at the lower parts of the pair of first frame members 14, the lifting device 10 can move freely in the front-rear direction and the left-right direction.

[0013] The second frame member 18 is also a metal rod-shaped member with a rectangular cross-section and is hollow, and connects a location near one end 14A of both ends in the longitudinal direction of the pair of first frame members 14. In this embodiment, the second frame member 18 is provided so as to extend in the left - right direction of the lifting device 10. Therefore, in a state where the lifting device 10 is connected to the aerial work platform 1 by a clamp 20 described later, the moving direction of the aerial work platform 1 coincides with the extending direction of the second frame member 18.

[0014] Further, when transporting the lifting device 10, the pair of first frame members 14 are bent so that their front sides face the vertical direction as shown in FIGS. 5 and 6. Here, the configuration and folding method of the pair of first frame members 14 will be described. As shown in FIG. 7, the pair of first frame members 14 includes a front frame member 1402, a rear frame member 1404, a support shaft member 1406 connecting them, and a stopper 1408. The front end portion 1404A of the rear frame member 1404 is composed of a pair of side plates facing each other in the left - right direction, and the rear end portion 1402A of the front frame member 1402 is inserted between the pair of side plates of the front end portion 1404A of the rear frame member 1404. With the support shaft member 1406 extending in the left - right direction as an axis, the front frame member 1402 is rotatably supported with respect to the rear frame member 1404. The stopper 1408 is composed of a cover 1410 with a rectangular cross - section and being hollow and covering the pair of first frame members 14, and a pin 1412 inserted into an insertion hole 1410A provided on the upper surface of the cover 1410. The pin 1412 is provided with a knob portion 1412A having a diameter larger than that of the insertion hole 1410A at the upper part.

[0015] A hole 1404B into which a pin 1412 is inserted is provided on the upper surface plate on the front side of the rear frame member 1404. As shown in FIG. 7(A), when the front frame member 1402 and the rear frame member 1404 extend linearly and are connected, the rear end portion 1402A of the front frame member 1402 is inserted into the cover 1410, and the pin 1412 inserted through the insertion hole 1410A is inserted into the hole 1404B. As a result, the front frame member 1402 is in a non-rotatable horizontal stationary state, and the pair of first frame members 14 are held in a state of extending linearly in the horizontal direction.

[0016] When the front frame member 1402 is to be bent, the pin 1412 is withdrawn from the hole 1404B, and the cover 1410 is moved in the rearward direction RR, thereby releasing the horizontal stationary state of the front frame member 1402 and making it rotatable. At this time, as shown in FIG. 7(B), the front frame member 1402 is rotated about the pivot member 1406 to be bent from the horizontal direction to the vertical direction.

[0017] When the front frame member 1402 is rotated and directed vertically, as shown in FIG. 7(C), the cover 1410 is moved forward again in the forward direction FR, and the pin 1412 inserted through the insertion hole 1410A is inserted into the hole 1404B of the rear frame member 1404. As a result, the end portion of the cover 1410 abuts against the rear end portion 1402A of the front frame member 1402, and the front frame member 1402 bent in the vertical direction becomes a non-rotatable vertical stationary state, and the front frame member 1402 is held in a state of being bent so as to be orthogonal to the rear frame member 1404. To return the pair of first frame members 14 from the state in which the front frame member 1402 is bent to a state of extending linearly, the reverse operation procedure is performed.

[0018] The clamp 20 is a connecting member provided on the base 12 and detachably connected to the aerial work platform 1 (mobile body). When connected to the aerial work platform 1, the lifting device 10 can travel following the aerial work platform 1. The clamp 20 of this embodiment is detachably connected to the pipe member F that constitutes the frame of the aerial work vehicle 1, thereby connecting the lifting device 10 to the aerial work vehicle 1. Also, two clamps 20 (one for each end) are provided at the ends of the pair of first frame members 14. Specifically, the clamps 20 are provided at the other ends 14B of the pair of first frame members 14, which are separated from the location connected by the second frame member 18.

[0019] Here, the clamp 20 will be described. As shown in FIG. 8, the clamp 20 is composed of a bracket 22, a bolt 24, and a nut 26, and is connected to the pipe member F that constitutes the frame of the aerial work vehicle 1. The pipe member F is located at the lower part of the aerial work vehicle 1 and extends in the traveling direction of the aerial work vehicle 1. The bracket 22 is a plate-shaped member bent in an L-shape, and is attached to the other end (front end) 14B of the pair of first frame members 14 such that the end side is open. Then, the pipe member F of the aerial work vehicle 1 is inserted and arranged in the space surrounded by the upper surfaces of the pair of first frame members 14 and the L-shaped bracket 22 in the left-right direction. Also, a female thread 2204 into which the male thread 2402 of the bolt 24 is screwed is formed at the center of the upper surface of the bracket 22.

[0020] The bolt 24 is formed with a male thread 2402 that screws into the female thread 2204 of the bracket 22, and a pressing member 2404 is rotatably supported at the tip portion. The pressing member 2404 presses the pipe member F arranged in the space surrounded by the upper surfaces of the pair of first frame members 14 and the bracket 22 from above. The lower surface 2404A of the pressing member 2404 is formed in the same arc shape as the outer peripheral surface of the pipe member F. The nut 26 is screwed onto the male thread 2402 of the bolt 24 and is located on the upper surface of the bracket 22 to prevent the bolt 24 from loosening.

[0021] When connecting the lifting device 10 to the aerial work platform 1, as an example, the pressing member 2404 of the clamp 20 is brought into contact with the outer peripheral surface of the pipe material F, and then the bolt 24 is rotated clockwise to press the pipe material F via the pressing member 2404. Further, with the head 2406 of the bolt 24 made non-rotatable with a tool, the nut 26 is rotated clockwise to fix the bolt 24 to the bracket 22, and the pipe material F is pressed and fixed by the upper surfaces of the pair of first frame members 14 and the bracket 22. Thereby, the clamp 20 is connected to the frame F of the aerial work platform 1. Note that the bolt 24 and the nut 26 may be rotated counterclockwise.

[0022] Returning to FIGS. 1 to 4, the transport wheels 28 are wheels used when transporting the lifting device 10, and are composed of a shaft portion 2802 connecting one end portion 14A of the pair of first frame members 14 and two wheels 2804 provided on the shaft portion 2802. Since the transport wheels 28 are not used when the lifting device 10 is traveling, the wheels 2804 are provided at positions where they do not contact the floor surface. The lifting device 10 is transported in a laid-down state. That is, during transportation, the lifting device 10 is laid down such that one end portion 14A of the pair of first frame members 14 faces downward in the vertical direction and the erected lifting mechanism 30 becomes horizontal. The transport wheels 28 are provided at positions where the wheels 2804 contact the floor surface in this laid-down state. In this embodiment, two transport wheels 28 are provided, but one or three or more transport wheels 28 may be provided.

[0023] The lifting mechanism 30 supports the load platform 34 so as to be able to move up and down, and includes a mast 32, a load platform 34, an operation handle 36, a winch 38, a battery 40, transport auxiliary wheels 42, and a control device 44. The lifting mechanism 30 is provided standing up from the second frame member 18, and has a rear surface 30A on the side where one end portion 14A in the longitudinal direction of the pair of first frame members 14 is located, and a front surface 30B located opposite thereto. That is, the lifting mechanism has a front face 30B facing the longitudinal ends of a pair of first frame members provided with the clamp. The loading platform 34 is lifted above between a pair of first frame members 14 on the front face 30B of the lifting mechanism 30.

[0024] The mast 32 is made of metal and is composed of a plurality of plate members having a U-shaped cross section, and stands upright from the second frame member 18. The mast 32 of the present embodiment is composed of a first plate member 32A, a second plate member 32B, and a third plate member 32C that are arranged in order from the front to the back of the lifting mechanism 30 and are slidably coupled to each other in the vertical direction. The lower end of the third plate member 32C is attached to the second frame member 18, and the upper part of the third plate member 32C is supported by a pair of stays 3204. A pulley 3202 is provided on each of the first plate member 32A, the second plate member 32B, and the third plate member 32C, and a groove portion through which a wire W connected to the loading platform 34 passes is formed on the circumferential surface of the pulley 3202. One end of the wire W is connected to the winch 38, passes through the pulleys 3202 provided on the third plate member 32C, the second plate member 32B, and the first plate member 32A respectively, and the other end is connected to a lifting plate 3402 of the loading platform 34 described later.

[0025] The loading platform 34 is a place where goods are placed, and the loading platform 34 is lifted on the front face of the lifting mechanism 30. The loading platform 34 includes a metal lifting plate 3402, forks 3404, and slide members 3406. The lifting plate 3402 is slidably coupled up and down to slide rails at both left and right ends in the lateral direction of the first plate member 32A of the mast 32, and is supported by the first plate member 32A so as to be liftable. The lifting plate 3402 is detachably provided on the first plate member 32A, and can be removed by sliding it above the first plate member 32A. The fork 3404 is detachably provided on the lifting plate 3402, extends along the extending direction (front-rear direction) of the pair of first frame members 14, and has a pair of arm portions 3404A that are lifted and lowered as the lifting plate 3402 is lifted and lowered. The slide member 3406 is provided between the pair of arm portions 3404A, and as shown in FIG. 4, it is slidable in the extending direction (front-rear direction) of the pair of arm portions 3404A and has an upper surface at the same height as the upper surfaces of the pair of arm portions 3404A. In addition, since the position of the slide member 3406 is fixed by a locking mechanism (not shown) at the position where the slide member 3406 is slid, the slide member 3406 can be stabilized and the lifting and lowering operation of the luggage can be performed. Various conventionally known mechanisms can be applied to the locking mechanism.

[0026] Further, on the slide member 3406, for example, any one of an X-axis table, an XY-axis table, a swivel table, a storage member 50, and a leaning member 52 is selectively and detachably provided. The X-axis table is a plate-like member that is slidable in a direction (left-right direction) orthogonal to the extending direction of the pair of arm portions 3404A. The XY-axis table is a plate-like member that is slidable in the extending direction (front-rear direction) of the pair of arm portions 3404A and in a direction (left-right direction) orthogonal to the extending direction thereof. The swivel table is a plate-like member that is rotatable about a vertical axis. By using such various tables, for example, when attaching a luggage near the ceiling, it is not necessary to lift the luggage once for alignment, and fine adjustment can be performed by moving the table back and forth, left and right, and rotating it, and then attaching it to a predetermined position. Note that various conventionally known tables provided with a slide mechanism or a swivel mechanism can be applied to these various tables.

[0027] As shown in FIG. 9(A), the storage member 50 is, for example, a box-shaped member formed of a metal mesh and having an open upper surface. By attaching such a storage member 50 to the slide member 3406 of the loading platform 34, small luggage such as various parts can be stored, transported, lifted, and lowered. As shown in Fig. 9(B), the leaning member 52 is formed in an L shape, for example, by a metal frame member, and a stopper 5202 made of a bent metal plate is provided on the frame member 52A on the bottom surface side. By attaching such a leaning member 52 to the slide member 3406 of the loading platform 34, a plate-shaped member such as a panel can be leaned and conveyed and lifted and lowered.

[0028] The operation handle 36 is a rod-shaped member that an operator grips when operating the lifting device 10 to move it, etc., and is provided to extend outward in the left-right direction from the upper part of the third plate member 32C of the mast 42.

[0029] The winch 38 is provided on the back surface 30A of the lifting mechanism 30, that is, on the rear side of the third plate member 32C of the mast 32, and winds and pays out the wire W by being rotated by a rotation-driving motor 38A. Thereby, the vertical expansion and contraction of the mast 32 and the lifting and lowering of the loading platform 34 arranged on the mast 32 are performed. That is, in the present embodiment, when the winch 38 rotates in the first direction in the state shown in Fig. 1 to wind up the wire W, the loading platform 34 provided with the lifting plate 3403 connected to the wire W rises as shown in Fig. 10(A). When the wire W is further wound up, the first plate member 32A rises as shown in Fig. 10(B). When the wire W is further wound up, the second plate member 32B rises in order as shown in Fig. 10(C). Also, when the winch 38 rotates in the second direction opposite to the first direction in the state shown in Fig. 10(C) to pay out the wire W, the second plate member 32B connected to the wire W descends as shown in Fig. 10(B). When the wire W is further paid out, the first plate member 32A descends as shown in Fig. 10(A). When the wire W is further paid out, the loading platform 34 provided with the lifting plate 3403 descends as shown in Fig. 1. The winch 38 is configured such that a latch mechanism (not shown) operates in both winding and paying out of the wire W, and the loading platform 34, the first plate member 32A, and the second plate member 32B can be fixed at an arbitrary position by fixing the wire W at an arbitrary position. The battery 40 supplies power to the motor 38A. Note that various conventionally known configurations can be adopted for the mechanism that causes the mast 32 to expand and contract in the vertical direction and the mechanism that raises and lowers the loading platform 34, and the configuration is not limited to the structure of the embodiment.

[0030] As shown in FIGS. 2 and 4, the auxiliary transport wheels 42 are wheels used when transporting the lifting device 10, and are two casters attached to the back of the motor 38A provided below the winch 38. The lifting device 10 is transported in the laid-down state as described above. Therefore, the auxiliary transport wheels 42 are provided at positions where they contact the floor surface in this laid-down state. In this way, by providing the auxiliary transport wheels 42, when transporting the lifting device 10 in the laid-down state, the two transport wheels 28 and the two auxiliary transport wheels 42 can be used to stabilize and run the lifting device 10, so that the lifting device 10 can be easily transported. Also, for example, when transporting the lifting device 10 by a truck or the like, when placing it on the loading platform of the truck, first bring the lifting device 10 close to the loading platform, and while running the auxiliary transport wheels 42, push the lifting device 10 backward while laying it down. Then, the laid-down lifting device 10 on the loading platform is run by the transport wheels 28 and the auxiliary transport wheels 42 and arranged at a predetermined position. Thereby, the lifting device 10 can be easily placed on the loading platform by running it while laying it down without lifting it and placing it on the loading platform of the truck. In this embodiment, two auxiliary transport wheels 42 are provided, but one or three or more may be provided.

[0031] The control device 44 has a hardware configuration using a normal computer including a control device such as a CPU (Central Processing Unit), a storage device such as a ROM (Read Only Memory) for storing a control program and a RAM (Random Access Memory) as an operating area of the control program, an output device, an input device, and a communication I / F (interface) for communicating with an external device. Upon receiving an operation from an operator, the control device 44 causes the battery 40 to supply power to drive the motor 38A, rotating the winch 38 in the first direction or the second direction. The operation by the operator is received, for example, from a controller (not shown) provided in the lifting device 10 and connected to the control device 44 via a wire, or from a controller (not shown) provided in the aerial work platform 1 and connected to the control device 44 via a network, and is transmitted to the control device 44.

[0032] When the lifting device 10 configured as described above is used in combination with the aerial work platform 1, the operator grips and operates the operation handle 36 to move the lifting device 10 next to the aerial work platform 1. Then, the ends 14B of the pair of frame members 14 provided with the clamp 20 are brought close to the pipe material F of the frame of the aerial work platform 1, and as shown in FIG. 11, the clamp 20 of the lifting device 10 is connected to the pipe material F of the aerial work platform 1. Once the lifting device 10 is connected to the aerial work platform 1, the worker places the load on the loading platform 34 and gets on the aerial work platform 1. After the operator raises the work platform 5, by operating the controller, the loading platform 34 is raised as shown in FIG. 11(B), and the operator receives the load on the work platform 5 and attaches the load to an appropriate location, for example. Alternatively, the operator places the load on the loading platform 34 from the work platform 5 and lowers it as shown in FIG. 11(A) to collect the load. When finishing the work and moving to the next work location, after lowering the work platform 5 of the aerial work platform 1 and the loading platform 34 of the lifting device 10, the aerial work platform 1 is moved to the next work location. Since the lifting device 10 is connected to the aerial work platform 1 via the clamp 20, the lifting device 10 is moved to the next work location following the aerial work platform 1. Then, in the same manner as above, after the operator on the aerial work platform 1 raises the work platform 5, by operating the controller, the loading platform 34 is raised and lowered to lift the load and perform various operations.

[0033] Also, when moving to the next work location, the platform of the lifting device 10 has been lowered above. However, since the lifting device 10 is connected to the aerial work platform 1 via the clamp 20 and the lifting device 10 is provided with four swivel wheels and has stability, the aerial work platform 1 may be moved to the next work location while keeping the platform 34 of the lifting device 10, the first plate member 32A, and the second plate member 32B raised. Thereby, the operation of lowering the platform 34 etc. of the lifting device 10 before moving and raising the platform 34 etc. at the next work location can be omitted, which is advantageous for shortening the working time.

[0034] Thus, according to the lifting device 10 of the present embodiment, a clamp 20 that is detachably connected to the aerial work platform 1 is provided on the base 12 of the lifting device 10, and the lifting device 10 can move following the aerial work platform 1 while being connected to the aerial work platform 1. Therefore, in various operations where the aerial work platform 1 and the lifting device 10 are used simultaneously, it is no longer necessary for the operator to get off the aerial work platform 1 once and move the lifting device 10. Also, another operator for moving the lifting device 10 is not required. Therefore, in various operations where the aerial work platform 1 and the lifting device 10 are used simultaneously, it is advantageous for shortening the time required for the movement of the operator, improving the working efficiency, and achieving labor savings.

[0035] Also, a plurality of clamps 20 are provided on the base 12, and since the lifting device 10 is connected to the aerial work platform 1 at a plurality of locations, it is advantageous for suppressing the inclination of the lifting device 10 and stably moving the lifting device 10 when moving the lifting device 10 following the aerial work platform 1. Also, the clamps 20 are respectively provided at the other ends 14B of a pair of first frame members 14 that are separated from the location connected by the second frame member 18 and are provided at the tip of the base 12, which is advantageous for easily connecting the lifting device 10 to the aerial work platform 1. In addition, with the clamp 20 connected to the aerial work platform 1, the moving direction of the aerial work platform 1 coincides with the extending direction of the second frame member 18, which is advantageous for moving the lifting device 10 following the aerial work platform 1 in a stable state.

[0036] In addition, the lifting mechanism 30 is provided to stand up from the second frame member 18. The lifting mechanism 30 has a front surface 30B located at the longitudinal end 14B of a pair of first frame members 14 where the clamp 20 is provided. Since the loading platform 34 is lifted above the pair of first frame members 14 at the front surface 30B of the lifting mechanism 30, with the lifting device 10 connected to the aerial work platform 1, the loading platform 34 will move up and down along the aerial work platform 1. Therefore, the operator can easily transfer the goods from the workbench 5 of the aerial work platform 1 to the loading platform 34 of the lifting device 10, which is advantageous for improving the efficiency of the work on the workbench 5 of the aerial work platform 1.

[0037] In addition, the loading platform 34 is configured to include a fork 3404 having a pair of arm portions 3404A that extend along the extending direction of the pair of first frame members 14 and are lifted, and a slide member 3406 provided between the pair of arm portions 3404A and having an upper surface that is slidable in the extending direction of the pair of arm portions 3404A and is at the same height as the upper surfaces of the pair of arm portions 3404A. Therefore, the goods placed on the loading platform 34 can be slid in the extending direction of the pair of first frame members 14, and the goods can be transferred between the loading platform 34 and the lifting device 10 without the operator getting out of the aerial work platform 1.

[0038] In addition, on the slide member 3406, any one of an X-axis table that is slidable in a direction perpendicular to the extending direction of the pair of arm portions 3404A, an XY-axis table that is slidable in the extending direction of the pair of arm portions 3404A and in a direction perpendicular to the extending direction thereof, a swivel table that is rotatable about a vertical axis, a storage member 50 having a depth capable of accommodating goods inside, and a leaning member 52 on which a plate-shaped good can be leaned and placed is selectively detachably provided. Therefore, the loading platform 34 can be selected according to the goods, which is advantageous for stabilizing the goods when the loading platform 34 is lifted.

[0039] Further, if the connecting member is constituted by a clamp 20 that is detachably connected to the pipe material F that constitutes the frame of the aerial work vehicle 1, the connecting work of the lifting device 10 to the aerial work vehicle 1 can be easily performed, which is advantageous in enhancing the work efficiency of various operations in which the aerial work vehicle 1 and the lifting device 10 are used simultaneously.

[0040] In the present embodiment, clamps 20 are provided at the ends of a pair of first frame members 14, respectively, and a total of two clamps 20 are provided. However, only one clamp 20 may be provided. However, if a plurality of clamps 20, such as two or three or more, are provided as in the present embodiment, it is advantageous for stably moving the lifting device 10 following the aerial work vehicle 1. Further, the clamp 20 may be configured to be provided with one or a plurality on either one of the first frame members 14. Specifically, for example, the clamp 20 may be provided at one end (the rear end) 14A and the other end (the front end) 14B of either one of the first frame members 14, respectively. Thereby, in a state where the clamp 20 is connected to the aerial work vehicle 1, the moving direction of the aerial work vehicle 1 and the extending direction of the pair of first frame members 14 can be made to coincide.

[0041] In the above-described embodiment, the case where the lifting device 10 is used in combination with the aerial work vehicle 1 which is a moving body has been described. However, the use of the lifting device 10 of the present invention is arbitrary. For example, a belt or a wire which is a moving body capable of traveling on the floor is arranged, and the clamp 20 is detachably connected to the belt or the wire. In this case, the lower surface of the pressing member 2404 of the bolt 24 is made flat, and is configured to be able to sandwich the belt or the wire. Thereby, the lifting device 10 can be easily moved to the work place, and the load can be lifted or lowered by the lifting device 10 at the moving destination, which is advantageous in improving the work efficiency and achieving labor saving.

Explanation of reference numerals

[0042] 10 Lifting device 12 Base 14 Pair of first frame members 1402 Front frame member 1404 Rear frame member 1406 Connecting member 1408 Stopper 16 Swivel wheel 18 Second frame member 20 Clamp (connecting member) 22 Bracket 2204 Female thread 24 Bolt 2402 Male thread 2404 Pressing member 2406 Head 26 Nut 28 Transport wheel 30 Lifting mechanism 32 Mast 32A First plate member 32B Second plate member 32C Third plate member 3202 Pulley 3204 Stay 34 Loading platform 3402 Lifting plate 3404 Fork 3404A Pair of arm parts 3406 Slide member 36 Operating handle 38 Winch 38A Motor 40 Battery 42 Transport auxiliary wheel 44 Control device 46 Operating handle 50 Accommodating member 52 Member F Pipe material W Wire

Claims

1. A lifting device comprising a base supported by a plurality of swivel wheels, and a lifting mechanism erected on the base and supporting a loading platform so as to be able to move up and down, A connecting member detachably connected to a moving body and provided on the base, the lifting device being able to travel following the moving body in a state of being connected to the moving body, The moving body is a belt or a wire arranged to be able to travel on a floor, The connecting member is a clamp detachably connected to the belt or the wire, A lifting device characterized by the above.

2. A plurality of the connecting members are provided on the base, The lifting device according to claim 1, characterized by the above.

3. The base includes a pair of first frame members linearly extending horizontally facing each other, and a second frame member connecting a location near one end of both ends in the longitudinal direction of the pair of first frame members, The connecting members are respectively provided at the other ends of the pair of first frame members separated from the location connected by the second frame member, The lifting device according to claim 1 or 2, characterized by the above.

4. In a state where the connecting member is connected to the moving body, the moving direction of the moving body and the extending direction of the second frame member coincide, The lifting device according to claim 3, characterized by the above.

5. The lifting mechanism is provided standing up from the second frame member, The lifting mechanism has a front facing the longitudinal ends of the pair of first frame members where the connecting members are provided, The loading platform is lifted above the pair of first frame members in front of the lifting mechanism, The lifting device according to claim 3 or 4, characterized by the above.

6. The loading platform includes a fork having a pair of arm portions extending along the extending direction of the pair of first frame members and being lifted, and a slide member provided between the pair of arm portions, slidable in the extending direction of the pair of arm portions, and having an upper surface at the same height as the upper surfaces of the pair of arm portions, The lifting device according to any one of claims 3 to 5, characterized by the above.

7. On the slide member, an X-axis table slidable in a direction orthogonal to the extending direction of the pair of arm portions, an XY-axis table slidable in the extending direction of the pair of arm portions and in a direction orthogonal to the extending direction thereof, a swivel table rotatable about a vertical axis, a housing member having a depth capable of housing a load therein, and any one of a leaning member on which a plate-shaped load can be leaned and placed are selectively detachably provided. The lifting device according to claim 6, characterized in that.

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