Mobile workbench

Abstract

To improve efficiency of high place work.SOLUTION: A mobile work bench 10 of the present invention comprises a main body component 100Ua composed of one work bench body 100, and a moving portion 200 for moving the main body component 100Ua. The main body component 100Ua comprises a top panel component 110Ua that serves as a scaffold and a leg component 130Ua that supports the top panel component 110Ua and is grounded to the floor surface. The moving portion 200 is positioned so that it overlaps the top plate component 110Ua when viewed from the top, and the main body component 100Ua is moved in all directions along the floor surface in response to operator's instructions, which can improve efficiency of high place work.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a mobile workbench. [Background technology]

[0002] Conventionally, work platforms for working at heights have been known. Patent Document 1 discloses a work platform that includes a top plate on which a worker stands to work, and a pair of front and rear main landing gear bodies formed by connecting two main landing gears facing each other on the left and right at each end of the top plate with connecting members at their middle and lower parts. The main landing gears are arranged at the four corners of the underside of the top plate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-181343 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the work platform of Patent Document 1, when it is desired to perform high-altitude work over a wide area, the worker must first get off the platform and move it, which poses a problem that the efficiency of high-altitude work cannot be improved. On the other hand, although high-altitude work can be performed over a wide area by arranging multiple work platforms in a row, the need to line up multiple work platforms in advance poses a problem that the efficiency of high-altitude work cannot be improved. The present invention has been made in consideration of the above-mentioned problems, and aims to improve the efficiency of work at heights. [Means for solving the problem]

[0005] The mobile workbench of the present invention is a mobile workbench comprising a main body component consisting of one workbench main body or a plurality of workbench main bodies, and a moving unit for moving the main body component, wherein the main body component has a top board component that serves as a foothold, and leg components that support the top board component and are grounded on the floor surface, the top board component is disposed at the upper end of the leg components, and the moving unit is positioned so as to overlap the top board component when viewed from above, a wheel unit consisting of a plurality of wheels; and a control unit disposed within a housing and controlling the driving of the wheel unit, wherein the control unit drives the wheel unit based on an instruction signal including directional information according to an instruction from an operator, the instruction signal being transmitted from an operation unit; The main body component is movable in all directions along the floor surface. [Effects of the Invention]

[0006] According to the present invention, the efficiency of work at height can be improved. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a diagram illustrating an example of the configuration of a mobile workbench according to a first embodiment. [Figure 2] FIG. 2 is a plan view showing an example of the configuration of a mobile workbench. [Figure 3] FIG. 2 is a side view showing an example of the configuration of a mobile workbench. [Figure 4] FIG. 2 is a front view showing an example of the configuration of the mobile workbench. [Figure 5] FIG. 1 is a cross-sectional view showing an example of the configuration of a mobile workbench. [Figure 6] FIG. 2 is a diagram illustrating an example of an internal configuration of a moving unit. [Figure 7A] FIG. 10 is a diagram for explaining a movement method by a movement unit. [Figure 7B] FIG. 10 is a diagram for explaining a movement method by a movement unit. [Figure 8] FIG. 2 is a diagram for explaining a method of operating the operation unit. [Figure 9A] 10A and 10B are diagrams for explaining a method of assembling the workbench. [Figure 9B] 10A and 10B are diagrams for explaining a method of assembling the workbench. [Figure 10] FIG. 10 is a perspective view showing an example of the configuration of a moving unit according to a second embodiment. [Figure 11] 10A and 10B are diagrams illustrating states before and after the biasing by the biasing member is stopped. [Figure 12] FIG. 10 is a plan view showing an example of the configuration of a mobile workbench according to a third embodiment. [Figure 13] FIG. 2 is a side view showing an example of the configuration of a mobile workbench. [Figure 14] FIG. 2 is a front view showing an example of the configuration of the mobile workbench. [Figure 15] FIG. 1 is a cross-sectional view showing an example of the configuration of a mobile workbench. [Figure 16] FIG. 10 is a diagram illustrating an example of the configuration of a workbench according to a fourth embodiment. [Figure 17] 10 is a perspective view showing a state in which the support member is detachably attached to the top plate portion. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, the mobile workbench according to this embodiment will be described with reference to the drawings. (First embodiment) The mobile work platform 10 of the first embodiment is a work platform for a worker to work at height. The mobile work platform 10 (work platform 10) is a so-called self-propelled type that can move according to instructions from a worker (user). The mobile work platform 10 of this embodiment is assumed to have a height from the floor surface to a top plate portion 110 (described later) of, for example, approximately 700 mm to approximately 1950 mm.

[0009] FIG. 1 is a perspective view showing an example of the configuration of a workbench 10. As shown in FIG. The workbench 10 of this embodiment includes a workbench main body 100, a moving section 200, a ladder section 300, an auxiliary handrail section 400, and the like. The workbench main body 100 is the main part of the workbench 10 that is used when a worker works at height. The workbench main body 100 corresponds to an example of a main body constituent part 100Ua when the workbench 10 is made up of one workbench main body 100. The configuration of the workbench main body 100 will be described later with reference to Figs. 2 to 4. The moving section 200 is a section for moving the workbench main body 100 in accordance with instructions from the operator. The configuration of the moving section 200 will be described later with reference to FIGS.

[0010] The ladder unit 300 is detachable from the workbench main body 100. In FIG. 1 , the ladder unit 300 is attached to the short end of the top panel 110 of the workbench main body 100, but it may also be attached to the long end. Attaching the ladder unit 300 allows a worker to ascend and descend between the top panel 110 of the workbench main body 100 and the floor. The ladder unit 300 includes a ladder unit 310 and a handhold unit 320. The ladder unit 310 is the part on which a worker ascends and descends, and has two leg members and a number of step bars. The two leg members each have casters 311a and 311b at their lower ends, and are connected to the floor via the casters 311a and 311b. The handhold unit 320 is the part on which a worker places their hands when ascending or descending the ladder unit 310.

[0011] The auxiliary handrail section 400 is detachably attached to the workbench main body 100. The auxiliary handrail section 400 has an auxiliary handrail section 410a that is approximately the same length as the workbench main body 100 in the shorter direction, and an auxiliary handrail section 410b that is approximately the same length as the workbench main body 100 in the longer direction. In this example, the auxiliary handrail section 410a is attached to the shorter end of the tabletop section 110 to which the ladder section 300 is not attached, and the auxiliary handrail section 410b is attached to the longer end of the tabletop section 110. However, the auxiliary handrail section 410a may also be attached to the end to which the ladder section 300 is attached. By attaching the auxiliary handrail section 400, the working area of ​​the workbench main body 100 is surrounded by the auxiliary handrail section 400. When a worker is working in the working area, part of the worker's body comes into contact with the auxiliary handrail section 400, allowing the worker to recognize the end of the working area.

[0012] Next, the configuration of the workbench main body 100 and the moving section 200 will be described with reference to Figures 2 to 7A and 7B. Figures 2 to 5 show the workbench 10 with the ladder section 300 and the auxiliary handrail section 400 detached. Fig. 2 is a plan view showing an example of the configuration of workbench 10. Fig. 3 is a side view showing an example of the configuration of workbench 10. Fig. 4 is a front view showing an example of the configuration of workbench 10. For ease of explanation, in each drawing, the front side is indicated as Fr, the rear side as Rr, the right side as R, and the left side as L, as necessary.

[0013] First, the workbench main body 100 will be described. The workbench main body 100 has a top plate portion 110 , legs 130 , and an auxiliary grounding portion 190 .

[0014] The top plate portion 110 functions as a foothold for workers working at height. The top plate portion 110 corresponds to an example of a top plate component portion 110Ua when the workbench 10 is composed of a single workbench main body 100. The top plate portion 110 has a rectangular shape that is long in the front-to-rear direction when viewed from above. The top plate portion 110 has a length of, for example, approximately 1500 mm in the front-to-rear direction and a length of, for example, approximately 1000 mm in the left-to-right direction. The top plate portion 110 is composed of, for example, multiple long top plate members made of an aluminum alloy connected together. The top plate portion 110 also has multiple protrusions 112 on its upper surface, which serves as a work surface, to act as anti-slip surfaces.

[0015] The top panel 110 also has multiple connecting members 114 located near the four corners. The connecting members 114 are used to connect adjacent workbench bodies 100. As shown by the two-dot chain line in the enlarged perspective view of FIG. 2, the connecting member 114 is bar-shaped and bent into a roughly U-shape when viewed from the side. The connecting member 114 has a base shaft 115, a grip 116, and a connecting shaft 117. The base shaft 115 is a vertical shaft extending from one end of the grip 116 and is biased in a direction to be accommodated within the top panel 110. The grip 116 is bent into a roughly V-shape when viewed from above and is gripped by an operator when lifting the connecting member 114. The connecting shaft 117 is a vertical shaft extending from the other end of the grip 116 and connects the top panel 110 to other workbench bodies 100. As shown by the solid line in the enlarged perspective view of FIG. 2 , when there is no workbench 10 to connect, the base shaft 115 and the connecting shaft 117 of the connecting member 114 are housed inside the top plate 110. On the other hand, to connect the connecting member 114 to another workbench main body 100, the worker pulls up the grip portion 116 to expose the lower end of the connecting shaft 117. Next, as shown by the two-dot chain line in the enlarged perspective view of FIG. 2 , the worker rotates the connecting member 114 about the base shaft 115, thereby positioning the connecting shaft 117 outside the outer periphery of the top plate 110 when viewed from above. Next, the worker can connect another workbench main body 100 by inserting the connecting shaft 117 from above into a connecting hole 118 (described later) of the other workbench main body 100.

[0016] The top panel 110 also has a plurality of connecting holes 118 as connected parts in positions close to the outer periphery. The connecting holes 118 are holes for connecting to other workbenches 10. For example, six connecting holes 118 are formed at the long side end and four at the short side end. The top panel 110 also has a plurality of handrail holes in positions close to the outer periphery for attaching auxiliary handrail parts 400.

[0017] The legs 130 have the function of supporting the weight of the top panel 110 and the weight of a worker working on the top panel 110. The legs 130 correspond to an example of a leg component 130Ua when the workbench 10 is composed of one workbench body 100. The legs 130 are connected to the underside of the top panel 110. Specifically, leg unit 130 has four leg members 131a to 131d. Note that leg member 131d is not shown in FIG. 3 because it is hidden by leg member 131c, and in FIG. 4 because leg member 131d is hidden by leg member 131b. Leg members 131a and 131b are located on the rear side in the front-to-rear direction and extend from top panel 110 toward the floor. Leg members 131a and 131b are located apart from each other in the left-to-right direction. Leg members 131c and 131d are located on the front side in the front-to-rear direction and extend from top panel 110 toward the floor. Leg members 131c and 131d are located apart from each other in the left-to-right direction.

[0018] The leg members 131a to 131d each have a main leg 132, an extendable leg 133, and a running portion 180. The main leg 132 is a main component of the leg members 131a to 131d. The main leg 132 is made of, for example, an aluminum alloy and is formed by extrusion molding. The main leg 132 is, for example, a hollow component having a substantially rectangular cross section.

[0019] The telescopic legs 133 are members that extend and retract the leg members 131a to 131d along the longitudinal direction. The telescopic legs 133 fit inside the main legs 132 and are slidable along the longitudinal direction of the main legs 132. The telescopic legs 133 are made of, for example, an aluminum alloy and are formed by extrusion molding. The telescopic legs 133 extend and retract the lengths of the leg members 131a to 131d by changing the length by which they protrude from the bottom ends of the main legs 132. The height of the tabletop 110 can be adjusted by extending and retracting the leg members 131a to 131d using the extendable legs 133. The height of the legs 130 can be adjusted in steps, for example, between 0 mm and 400 mm, at intervals of approximately 50 mm or approximately 100 mm (in FIGS. 3 and 4, the most extended state is shown by a two-dot chain line, and the most retracted state is shown by a solid line).

[0020] Furthermore, main leg 132 has locking mechanism 135 (see FIG. 4). Locking mechanism 135 locks in stages the length that telescopic leg 133 projects from the bottom end of main leg 132. Locking mechanism 135 is attached to the side where leg member 131a and leg member 131b face each other and the side where leg member 131c and leg member 131d face each other.

[0021] Furthermore, horizontal bridge members 137a and 137b are provided between leg members 131a and 131b, and between leg members 131c and 131d. The horizontal bridge members 137a and 137b are members that improve the rigidity of leg members 131a to 131d. 4, a plurality of cross members 137a, 137b are spanned between leg member 131a and leg member 131b at intervals in the vertical direction. Specifically, a plurality of (three) cross members 137a are arranged between main leg 132 of leg member 131a and main leg 132 of leg member 131b, and one cross member 137b is arranged between telescopic leg 133 of leg member 131a and telescopic leg 133 of leg member 131b. Cross member 137a is fixed to main leg 132 via a bracket using bolts, rivets, etc. Meanwhile, cross member 137b is fixed to telescopic leg 133 via a bracket using bolts, rivets, etc.

[0022] The cross members 137a and 137b are made of, for example, an aluminum alloy and formed by extrusion molding. The cross members 137a and 137b are, for example, hollow or solid members with a substantially rectangular or polygonal cross section. Since the cross member 137b is fixed to the telescopic leg 133, the length by which the telescopic leg 133 protrudes from the main leg 132 can be changed by moving the cross member 137b in the vertical direction. Here, we have described the cross members 137a and 137b that are bridged between leg members 131a and 131b, but cross members 137a and 137b with a similar configuration and at a similar height are also bridged between leg members 131c and 131d.

[0023] In this way, by bridging the cross members 137a and 137b between the leg members 131a and 131b and between the leg members 131c and 131d, the leg members 131a and 131b are configured as one unit, i.e., the first leg body 140A, and the leg members 131c and 131d are configured as one unit, i.e., the second leg body 140B. The leg portion 130 is arranged so that the pair of leg bodies 140A and 140B face each other in the front-to-rear direction. Here, leg body 140A and leg body 140B can be folded so as to overlap with respect to top panel portion 110. That is, leg members 131a and 131b are rotatably connected to top panel portion 110, and leg members 131c and 131d are rotatably connected to top panel portion 110. By folding leg body 140A and leg body 140B, the transportability of workbench main body 100 can be improved.

[0024] The running section 180 has the function of smoothly moving the workbench main body 100 while supporting the top plate section 110 when the moving section 200 moves the workbench main body 100 . Specifically, the running unit 180 has four casters 181a to 181d. In FIG. 3, the caster 181d is hidden by the caster 181c, and in FIG. 4, the caster 181d is hidden by the caster 181b, and is therefore not shown. The casters 181a to 181d are connected to the lower ends of the telescopic legs 133 of the leg members 131a to 131d so as to be rotatable about vertical axes. The casters 181a to 181d may be casters with stoppers that can fix the rotation of the wheels in response to an operation by the operator, or may be casters without stoppers. Each of the casters 181a to 181d in this embodiment has two wheels 183 so that the workbench main body 100 can be easily moved.

[0025] The auxiliary grounding portion 190 functions as an outrigger that prevents the workbench main body 100 from tipping over when a force is applied from above to the outer periphery of the top plate portion 110. Here, the auxiliary grounding portion 190 is disposed so as to protrude from the outer periphery of the top plate portion 110 when viewed from above. Specifically, auxiliary ground contact portion 190 has four auxiliary leg members 191a to 191d. In Fig. 3, auxiliary leg member 191d is hidden by auxiliary leg member 191c, and in Fig. 4, auxiliary leg member 191d is hidden by auxiliary leg member 191b, so it is not shown. Auxiliary leg members 191a to 191d are attached to telescopic legs 133 of leg members 131a to 131d, respectively.

[0026] Furthermore, the auxiliary leg members 191a to 191d of this embodiment can transition between a first state in which they extend beyond the outer periphery of the tabletop 110 when viewed from above, and a second state in which they do not extend beyond the outer periphery of the tabletop 110. Specifically, the worker unlocks the auxiliary leg members 191a to 191d from a state in which they extend toward the floor and rotates them upward, thereby transitioning the auxiliary leg members 191a to 191d to a state in which they are aligned substantially vertically (see the two-dot chain line in FIG. 4).

[0027] In the first state, as shown in FIG. 4, the auxiliary leg members 191a to 191d extend beyond the vertical line E that passes through the outer periphery of the tabletop 110 in a front view. In addition, in the first state, the tips of the auxiliary leg members 191a to 191d are closer to the floor than in the second state. Here, the tips of the auxiliary leg members 191a to 191d are set to be slightly spaced apart from the floor. Therefore, even if a force is applied from above to any position on the long side end of the outer periphery of the tabletop 110, the auxiliary leg members 191b to 191d closest to the position where the force is applied will come into contact with the floor, thereby preventing the workbench main body 100 from tipping over. However, the tips of the auxiliary leg members 191a to 191d do not necessarily have to be spaced apart from the floor, and may be in contact with the floor. On the other hand, in the second state, as shown in FIG. 4, the auxiliary leg members 191a to 191d do not protrude from the vertical line E passing through the outer periphery of the tabletop 110 when viewed from the front. Furthermore, in the second state, the tips of the auxiliary leg members 191a to 191d are further away from the floor than in the first state. Therefore, there is no possibility that the tips of the auxiliary leg members 191a to 191d will come into contact with the floor when the workbench main body 100 is moved. Furthermore, by ensuring that the auxiliary leg members 191a to 191d do not protrude from the outer periphery of the tabletop 110 when viewed from above, as in the second state, the workbench main body 100 can be moved even in a narrow space without the auxiliary leg members 191a to 191d getting in the way. Furthermore, since the auxiliary leg members 191a to 191d are attached to the telescopic legs 133 of the leg members 131a to 131d, they are not affected even when the telescopic legs 133 are extended or retracted to adjust the height of the top plate portion 110, and the workbench main body 100 can be prevented from tipping over.

[0028] Next, the moving unit 200 will be described with reference to FIGS. Fig. 5 is a cross-sectional view taken along line II in Fig. 4 and seen from the direction of the arrow. Fig. 6 is a diagram showing the internal configuration of moving unit 200. Figs. 7A and 7B are diagrams for explaining a movement method by moving unit 200. Fig. 8 is a diagram for explaining a method of operating operating unit 240. The moving unit 200 moves the workbench main body 100 in response to instructions from the worker. Specifically, the moving unit 200 moves along the floor surface by itself, and the workbench main body 100 to which the moving unit 200 is fixed also moves in the same direction as the moving unit 200. The moving unit 200 can move the workbench main body 100 with the worker still resting on it.

[0029] The moving unit 200 has a main body unit 210 , a wheel unit 230 , an operating unit 240 , and an emergency stop unit 250 . The main body 210 functions as a drive unit for the moving unit 200. The main body 210 is located below the top plate 110 of the workbench main body 100. The components of the main body 210 are arranged inside a rectangular parallelepiped housing 211 that is long in the front-to-rear direction. The main body 210 is, for example, approximately 700 mm long in the front-to-rear direction, approximately 300 mm long in the left-to-right direction, and approximately 200 mm high.

[0030] As shown in FIG. 6, the main body 210 includes a control unit 212, a battery unit 213, a voltage measurement unit 215, switching regulators 216a and 216b, motor drivers 217a to 217d, motors 218a to 218d, and gearboxes 219a to 219d.

[0031] The control unit 212 controls the entire moving unit 200. The control unit 212 controls the moving unit 200 to move the workbench main body 100 in accordance with instructions from the operator. Specifically, the control unit 212 transmits control signals to the motor drivers 217a to 217d based on instruction signals transmitted from the operation unit 240, thereby rotating the motors 218a to 218d.

[0032] The battery unit 213 supplies power to the control unit 212, motor drivers 217a to 217d, etc. The battery unit 213 has a plurality of detachable batteries 214a and 214b. The batteries 214a and 214b may be, for example, lithium ion batteries. The voltage measurement unit 215 measures the voltage of the battery unit 213 and transmits information about the measured voltage to the control unit 212 .

[0033] The switching regulators 216a and 216b convert the input voltage from the battery unit 213 into a predetermined voltage and output it to the control unit 212 and the motor drivers 217a to 217d. The motor drivers 217a to 217d drive the motors 218a to 218d based on control signals from the control unit 212. Specifically, the motor drivers 217a to 217d receive signals indicating the rotation direction and rotation speed of the motors 218a to 218d from the control unit 212, and energize (U, V, W) the motor coils of the motors 218a to 218d so that the rotation direction and rotation speed correspond to the received signals. At this time, the motor drivers 217a to 217d control the energization based on hall signals (Hu, Hv, Hw) from hall sensors that detect the rotor positions of the motors 218a to 218d.

[0034] The motors 218a to 218d are energized by the motor drivers 217a to 217d, and rotate in a direction and at a speed corresponding to a signal from the control unit 212. The gear boxes 219a to 219d reduce the rotation speed of the motors 218a to 218d and transmit the reduced rotation speed to the wheel unit 230. Therefore, the main body 210 can drive the wheel unit 230 in response to an instruction from an operator.

[0035] The wheel unit 230 has, for example, multiple (four) wheels 231a to 231d. The wheels 231a to 231d are located on the right or left side of the main body unit 210. Specifically, the wheel 231a is located on the left front side, the wheel 231b is located on the right front side, the wheel 231c is located on the left rear side, and the wheel 231d is located on the right rear side. The axial directions of the axles of the wheels 231a to 231d all run along the left-right direction. The moving unit 200 of this embodiment is configured to be movable in all directions along the floor surface by the rotation of each of the wheels 231a to 231d of the wheel unit 230. Furthermore, the moving unit 200 of this embodiment is configured to be swivelable about a vertical axis by the rotation of each of the wheels 231a to 231d of the wheel unit 230.

[0036] Specifically, wheels 231a to 231d each have a plurality of barrel-shaped rollers 232 arranged around the axial direction of the axle (see FIG. 7A(a) described later). The rollers 232 are made of, for example, synthetic resin. Each of the plurality of rollers 232 is inclined at an angle of 45 degrees with respect to the axial direction of the axle. Here, rollers 232 of wheel 231a and rollers 232 of wheel 231d are inclined in the same direction, and rollers 232 of wheel 231b and rollers 232 of wheel 231c are inclined in the same direction. Rollers 232 of wheel 231a and rollers 232 of wheel 231b are inclined in different directions.

[0037] 7A and 7B are diagrams showing the relationship between the rotation direction of wheels 231a to 231d and the movement and turning directions of moving part 200. FIG. 7A(a) is a diagram showing the rotation directions of the wheels 231a to 231d when moving forward the moving part 200. To move the moving part 200 forward, the wheels 231a to 231d are each rotated forward (first direction). 7A(b) is a diagram showing the rotation directions of the wheels 231a to 231d when moving backward the moving part 200. To move the moving part 200 backward, the wheels 231a to 231d are each rotated backward (second direction).

[0038] 7A(c) is a diagram showing the rotation directions of the wheels 231a to 231d when moving the moving part 200 in a right translational movement (right lateral movement). To move the moving part 200 in a right translational movement, the wheels 231a and 231d are rotated forward (first direction), and the wheels 231b and 231c are rotated backward (second direction). 7A(d) is a diagram showing the rotation directions of the wheels 231a to 231d when moving the moving part 200 in a left translational movement (left lateral movement) direction. To move the moving part 200 in a left translational movement direction, the wheels 231a and 231d are rotated backward (second direction), and the wheels 231b and 231c are rotated forward (first direction).

[0039] 7B(a) is a diagram showing the rotation directions of the wheels 231a to 231d when moving the moving unit 200 diagonally forward to the right. To move the moving unit 200 diagonally forward to the right, the wheels 231a and 231d are rotated forward (first direction), and the wheels 231b and 231c are not rotated. 7B(b) is a diagram showing the rotation directions of the wheels 231a to 231d when moving the moving unit 200 diagonally forward and left. To move the moving unit 200 diagonally forward and left, the wheels 231b and 231c are rotated forward (first direction), and the wheels 231a and 231d are not rotated.

[0040] 7B(c) is a diagram showing the rotation directions of the wheels 231a to 231d when moving the moving unit 200 diagonally backward and left. To move the moving unit 200 diagonally backward and left, the wheels 231a and 231d are rotated backward (second direction), and the wheels 231b and 231c are not rotated. 7B(d) is a diagram showing the rotation directions of the wheels 231a to 231d when moving the moving unit 200 diagonally backward to the right. To move the moving unit 200 diagonally backward to the right, the wheels 231b and 231c are rotated backward (second direction), and the wheels 231a and 231d are not rotated.

[0041] Here, we have described eight directions of movement: forward, backward, right parallel movement, left parallel movement, right diagonal forward movement, left diagonal forward movement, left diagonal backward movement, and right diagonal backward movement. However, by controlling the rotational speed of each of the wheels 231a to 231d, the moving part 200 can move in any direction within 360°.

[0042] 7B(e) is a diagram showing the rotation directions of wheels 231a to 231d when turning right the moving unit 200. To turn right the moving unit 200, wheels 231a and 231c are rotated forward (first direction), and wheels 231b and 231d are rotated backward (second direction). 7B(f) is a diagram showing the rotation directions of the wheels 231a to 231d when turning left the moving unit 200. To turn left the moving unit 200, the wheels 231a and 231c are rotated backward (second direction), and the wheels 231b and 231d are rotated forward (first direction).

[0043] The operation unit 240 is a part that can be operated by an operator and is used to instruct the control unit 212 of the moving unit 200 to move. The operation unit 240 is connected to the main body 210 of the moving unit 200 via a cable 245. The cable 245 has a length that allows the operator to operate the operation unit 240 while standing on the top plate 110 of the workbench main body 100. However, the operation unit 240 and the main body 210 may be capable of communicating wirelessly.

[0044] The operation unit 240 is a so-called joystick type. The operation unit 240 has a stick 241 that stands upright in the vertical direction. The stick 241 can be tilted in any direction within 360° from the upright position. Furthermore, the stick 241 can be rotated right or left around an axis while remaining upright.

[0045] FIG. 8 is a diagram for explaining how to operate the operating unit 240, and is a diagram seen along the axial direction of the stick 241. When the operator tilts the stick 241 forward, an instruction signal to move the moving part 200 forward is sent to the main body 210, and when the operator tilts the stick 241 backward, an instruction signal to move the moving part 200 backward is sent to the main body 210. When the operator tilts the stick 241 to the right, an instruction signal is sent to the main body 210 to move the moving part 200 parallel to the right, and when the operator tilts the stick 241 to the left, an instruction signal is sent to the main body 210 to move the moving part 200 parallel to the left.

[0046] When the operator tilts the stick 241 diagonally forward to the right, an instruction signal is sent to the main body 210 to move the moving part 200 diagonally forward to the right, and when the operator tilts the stick 241 diagonally forward to the left, an instruction signal is sent to the main body 210 to move the moving part 200 diagonally forward to the left. When the operator tilts the stick 241 diagonally backward to the left, an instruction signal is sent to the main body 210 to move the moving part 200 diagonally backward to the left, and when the operator tilts the stick 241 diagonally backward to the right, an instruction signal is sent to the main body 210 to move the moving part 200 diagonally backward to the right.

[0047] Here, the case where the stick 241 is tilted in eight directions has been described, but it can be tilted in any direction through 360°. When the worker tilts the stick 241 in any direction, an instruction signal to move the moving unit 200 in that direction is transmitted.

[0048] In addition, when the worker rotates the stick 241 to the right around the axis while keeping the stick 241 upright, an instruction signal to rotate the moving part 200 to the right is sent to the main body 210, and when the worker rotates the stick 241 to the left, an instruction signal to rotate the moving part 200 to the left is sent to the main body 210.

[0049] The emergency stop unit 250 is a button that the operator uses to instruct the moving unit 200 to stop driving. For example, as shown in FIG. 1 , the emergency stop unit 250 is connected to the main body 210 of the moving unit 200 via a cable 255. The cable 255 has a length that allows the operator to operate it while standing on the top plate 110 of the workbench main body 100. However, the emergency stop unit 250 and the main body 210 may be capable of communicating wirelessly.

[0050] 3 to 5, the moving unit 200 is fixed to the workbench main body 100 via a detachable fixing unit 500. The fixing unit 500 fixes the moving unit 200 to the telescopic leg 133 side of the legs 130 of the workbench main body 100, rather than the main leg 132 side, so that the moving unit 200 always contacts the floor surface even when the height of the top panel 110 is adjusted. The fixing part 500 has a leg fixing part 501 , an intermediate part 503 , and a main body fixing part 504 .

[0051] The leg fixing part 501 is fixed to the telescopic leg 133 side of the leg 130, not to the main leg 132 side. The leg fixing part 501 is a rod-shaped member extending in the front-rear direction, and is spanned between a pair of horizontal members 137b positioned facing each other in the front-rear direction. The leg fixing part 501 is made of, for example, an aluminum alloy. Both ends of the leg fixing part 501 are fixed to the horizontal members 137b via clamp members 502. The leg fixing part 501 is also fixed to the lower end of the horizontal member 137b. Here, the two leg fixing parts 501 are positioned separately on the left and right so that the moving part 200 is sandwiched between them. Note that the leg fixing part 501 does not have to be fixed to the horizontal member 137b, and may also be fixed to the telescopic leg 133. The leg fixing part 501 may also be fixed to a member that moves in synchronization with the telescopic leg 133 when the telescopic leg 133 slides along the main leg 132. As shown in Figure 3, when viewed from the side, the leg fixing portion 501 is positioned so as not to extend beyond the vertical line E passing through the outer peripheral edge of the tabletop portion 110, thereby preventing the leg fixing portion 501 from coming into contact with surrounding objects or passersby from coming into contact with the leg fixing portion 501 when the workbench main body 100 is moved.

[0052] The intermediate section 503 connects the leg fixing section 501 and the main body fixing section 504. The intermediate section 503 is made of, for example, an aluminum alloy. Two intermediate sections 503 are fixed to each of the pair of leg fixing sections 501. The two intermediate sections 503 are fixed at positions spaced apart in front and behind the leg fixing section 501, and extend obliquely from the leg fixing section 501 upward and toward the center in the front-to-rear direction so as to approach each other. The two intermediate sections 503 extend obliquely in this way to avoid interference with the wheels 231a to 231d of the moving section 200. Note that the intermediate sections 503 may extend only upward from the leg fixing section 501 as long as they do not interfere with the moving section 200.

[0053] The main body fixing parts 504 are fixed to the housing 211 of the main body unit 210 of the moving unit 200. The main body fixing parts 504 are rod-shaped members extending in the left-right direction, and are bridged over a pair of intermediate parts 503 positioned opposite each other on the left and right. The main body fixing parts 504 are made of, for example, an aluminum alloy. For example, the center part of the main body fixing part 504 is fixed via a clamp member 505 coupled to the upper surface of the housing 211 of the main body unit of the moving unit 200. Here, the two main body fixing parts 504 are located directly above the housing 211 and extend out beyond the housing 211 in the left-right direction. The main body fixing parts 504 fix the housing 211 by pressing it down from above, thereby preventing the housing 211 from floating up. The moving part 200 fixed to the workbench main body 100 by the fixing part 500 overlaps the workbench main body 100 when viewed from above, and is positioned so as not to protrude from the outer peripheral edge of the top plate part 110. By positioning the moving part 200 so as not to protrude from the outer peripheral edge of the top plate part 110 when viewed from above, it is possible to prevent the moving part 200 from coming into contact with surrounding objects or passersby coming into contact with the moving part 200 when the workbench main body 100 moves. Although the case where the fixed unit 500 is fixed to the cross member 137b via the clamp member 502 and to the moving unit 200 via the clamp member 505 has been described, the present invention is not limited to this case and the fixed unit may be fixed by means of a member other than a clamp member. In other words, the fixed unit 500 is not limited to the above-described configuration as long as it is configured to be able to fix the moving unit 200 to the workbench main body 100.

[0054] Here, a method for assembling the workbench 10 by fixing the workbench main body 100 and the moving part 200 via the fixing part 500 will be described. FIG. 9A is a diagram for explaining the first assembly method. In the first assembly method, as shown in FIG. 9A , the fixed unit 500 is first fixed to the upper surface of the housing 211 of the movable unit 200 via the clamp members 505, and the movable unit 200 with the fixed unit 500 fixed thereto is placed on the floor. Next, the workbench main body 100 is lifted and positioned so that the clamp members 502 of the fixed unit 500 and the cross member 137b of the workbench main body 100 face each other vertically. Next, the workbench main body 100 is gradually lowered from above the movable unit 200, and the cross member 137b is brought into contact with the clamp members 502 of the fixed unit 500 and fixed to the cross member 137b with the clamp members 502, thereby assembling the workbench 10. In the workbench 10 assembled in this manner, part of the load of the workbench main body 100 is borne by the movable unit 200 from above via the cross member 137b and the fixed unit 500. Therefore, by pressing the movable part 200 downward from the workbench main body 100 via the fixed part 500, the frictional force between the wheels 231a to 231d of the movable part 200 and the floor surface can be increased, and the gripping force of the wheels 231a to 231d can be improved.

[0055] FIG. 9B is a diagram for explaining the second assembly method. In the second assembly method, as shown in FIG. 9B , the fixed part 500 is first fixed to the cross member 137b of the workbench main body 100 via the clamp member 502. Meanwhile, the movable part 200 is placed on the floor as a standalone unit. Next, the workbench main body 100 with the fixed part 500 fixed thereto is lifted up and positioned so that the main body fixing part 504 of the fixed part 500 and the clamp member 505 connected to the workbench main body 100 face each other vertically. Next, the workbench main body 100 is gradually lowered from above the movable part 200, and the main body fixing part 504 of the fixed part 500 abuts on the clamp member 505 of the movable part 200, thereby fixing the main body fixing part 504 with the clamp member 505, thereby assembling the workbench 10. In the workbench 10 assembled in this manner, part of the load of the workbench main body 100 is borne by the movable part 200 from above via the cross member 137b and the fixed part 500. Therefore, by pressing the movable part 200 downward from the workbench main body 100 via the fixed part 500, the frictional force between the wheels 231a to 231d of the movable part 200 and the floor surface can be increased, and the gripping force of the wheels 231a to 231d can be improved.

[0056] Since the moving part 200 is fixed to the workbench main body 100 via the fixing part 500 in this way, when the moving part 200 moves, the workbench main body 100 moves in sync with the moving direction of the moving part 200. In other words, the moving part 200 can move the workbench main body 100 along the floor surface in response to instructions from the worker. Specifically, when working at height, the worker adjusts the height of the tabletop 110 in advance by extending and retracting the leg members 131a to 131d using the extendable legs 133. The worker stands on the tabletop 110 of the workbench main body 100 to work at height, and then finishes the work at height at that work position. Next, while still standing on the tabletop 110, the worker operates the operating unit 240 to instruct movement to the next work position.

[0057] For example, if an operator wants to move the workbench main body 100 parallel to the right, the operator tilts the stick 241 of the operating unit 240 to the right, and an instruction signal to move the moving unit 200 parallel to the right is sent from the operating unit 240 to the main body 210 of the moving unit 200. In response to the instruction signal for rightward parallel movement, the control unit 212 of the main body 210 of the moving unit 200 sends control signals to the motor drivers 217a to 217d to rotate the wheels 231a and 231d forward and the wheels 231b and 231c backward, thereby causing the moving unit 200 to move rightward parallel. As the moving part 200 moves in parallel to the right, the workbench main body 100, to which the moving part 200 is fixed via the fixing part 500, also moves in parallel to the right in synchronization with the moving part 200. In this way, with the worker still resting on the workbench main body 100, the moving part 200 moves the workbench main body 100 along the floor surface in response to the worker's instructions.

[0058] According to the workbench 10 of this embodiment, the moving unit 200 moves the workbench main body 100 in accordance with the instructions of the worker, so the worker does not need to move the workbench main body 100 himself or line up the workbench main body 100 over a wide area in advance, thereby improving the efficiency of work at heights.

[0059] Furthermore, the workbench 10 of this embodiment includes legs 130 that support the top panel 110 and are in contact with the floor, reducing the burden on the moving part 200 of supporting the weight of the workbench main body 100 and the worker. Therefore, there is no need to make the moving part 200 excessively strong, and since a high driving force is not required, the manufacturing cost of the workbench 10 can be reduced.

[0060] Furthermore, the moving part 200 of this embodiment is fixed to the cross member 137b, which moves in synchronization with the extendable legs 133 when the leg members 131a to 131d are extended or retracted. Therefore, the height of the tabletop part 110 can be adjusted without affecting the movement of the workbench main body 100 by the moving part 200.

[0061] Furthermore, the moving part 200 of this embodiment is fixed to the workbench main body 100 via a detachable fixing part 500. Therefore, when transporting the workbench 10 to a work site, the workbench main body 100 and the moving part 200 are transported separately, and the moving part 200 is fixed to the workbench main body 100 via the fixing part 500, thereby enabling the workbench 10 to be assembled at the work site. At this time, by transporting the workbench 10 to the work site in a state in which the leg bodies 140A and 140B are folded relative to the top panel part 110, the transportability of the workbench 20 can be improved.

[0062] Furthermore, when the moving part 200 of this embodiment is stopped, the brake function of the moving part 200 itself prevents the workbench main body 100 from moving. Therefore, the worker does not need to apply stoppers (locks) to fix the rotation of the wheels of the four casters 181a to 181d, which improves the efficiency of working at heights.

[0063] In the first state, the auxiliary ground contact portion 190 of the workbench main body 100 is set so that the tips of the auxiliary leg members 191a to 191d are slightly separated from the floor surface, and therefore the auxiliary ground contact portion 190 does not come into contact with the floor surface when the moving portion 200 moves the workbench main body 100 along a horizontal floor surface. On the other hand, if the floor surface is uneven or not horizontal, or if the workbench main body 100 is to move in a narrow space, it is preferable that the worker put the auxiliary ground contact portion 190 in the second state and keep it away from the floor surface so that the auxiliary ground contact portion 190 does not come into contact with the floor surface or an obstacle.

[0064] (Second embodiment) The moving unit 260 of the second embodiment has a function of urging the wheels 231a to 231d toward the floor surface to reduce the impact that the wheels 231a to 231d receive from the floor surface. Furthermore, the moving unit 260 of the second embodiment can temporarily stop the function of urging the wheels 231a to 231d toward the floor surface.

[0065] Fig. 10 is a perspective view showing an example of the configuration of the moving unit 260. Fig. 11 is a front view showing an example of the configuration of the moving unit 260. Note that the following description will focus on configurations that are different from the first embodiment, and descriptions of configurations that are similar to the first embodiment will be omitted as appropriate. The main body 270 of the moving part 260 has a swinging member 271, a biasing member 274 (see FIG. 11), and a restricting member 275.

[0066] Swinging member 271 supports wheels 231a to 231d so that they can swing up and down around swing shaft 272. Swinging member 271 is located between wheels 231a to 231d and housing 211. Swinging member 271 has locked portion 273 for locking with restricting member 275. Swinging member 271 can be, for example, a plate-shaped member.

[0067] The biasing members 274 bias the wheels 231a to 231d so as to press them against the floor surface in order to reduce the impact that the wheels 231a to 231d receive from the floor surface. The biasing members 274 are disposed close to the wheels 231a to 231d, respectively, inside the housing 211. The biasing members 274 bias the swinging member 271 from above, thereby biasing the wheels 231a to 231d toward the floor surface via the swinging member 271. The biasing members 274 can be, for example, coil springs.

[0068] The regulating member 275 temporarily stops the urging force by the urging member 274. The regulating member 275 is attached to the housing 211, and is disposed close to each of the wheels 231a to 231d. When assembling the workbench 10, the worker uses the regulating member 275 to stop the urging force by the urging member 274, and after assembling the workbench 10, the worker operates the regulating member 275 to return to a state in which the urging force is applied by the urging member 274 again. The regulating member 275 can be, for example, a toggle clamp.

[0069] 11(a) and (b) are diagrams showing the states of the moving part 260 before and after the biasing force of the biasing member 274 is stopped using the restricting member 275. Specifically, Fig. 11(a) is a diagram showing the state of the moving part 260 alone before the biasing force of the biasing member 274 is stopped, and Fig. 11(b) is a diagram showing the state of the moving part 260 alone when the biasing force of the biasing member 274 is stopped.

[0070] The restricting member 275 has a restricting lever 276 that is operated by an operator, an attachment portion 277 for attaching the restricting member 275 to the housing 211 of the moving portion 260, and a locking portion 278 that hangs down from the restricting lever 276. The restricting lever 276 is rotatable about a rotation axis 279 relative to the attachment portion 277. As shown in FIG. 11(a), before the workbench 10 is assembled, the urging force of the urging member 274 is not stopped using the restricting member 275, so the housing 211 is positioned so as to be raised by the urging force of the urging member 274. When assembling the workbench 10, the worker hooks the locking portion 278 onto the locked portion 273 to lock them, and rotates the restricting lever 276 in a direction toward the housing 211. As the restricting lever 276 rotates, the swinging member 271 is pulled up against the biasing force of the biasing member 274.

[0071] 11(b), by rotating the restriction lever 276 onto the housing 211, the locking portion 278 moves beyond the rotation shaft 279 toward the housing 211, the position of the restriction lever 276 is maintained, and the biasing member 274 is maintained in a contracted state. Here, maintaining the biasing member 274 in a contracted state means that the biasing force of the biasing member 274 is stopped. Since the biasing force of the biasing member 274 is stopped by using the restricting member 275, the housing 211 is positioned lower than when the biasing force of the biasing member 274 is not stopped.

[0072] The worker assembles the moving part 260, which has had the biasing force of the biasing member 274 stopped using the regulating member 275, and the workbench main body 100 via the fixed part 500 using the first or second assembly method described above. After assembling the workbench 10, the worker rotates the restricting lever 276 of the restricting member 275 in a direction away from the housing 211, and then removes the locking portion 278, which has been locked to the locked portion 273 of the swinging member 271, from the locked portion 273, thereby returning the workbench 10 to the state in which it is biased by the biasing member 274. By returning the workbench 10 to the state in which it is biased by the biasing member 274, the biasing member 274 tries to extend as shown in Fig. 11(a), but because the moving unit 200 receives the load of the workbench main body 100 from above, the housing 211 of the moving unit 200 is prevented from floating up. Since the housing 211 of the moving unit 200 does not float up, the biasing member 274 biases the wheels 231a to 231d toward the floor surface. Therefore, the frictional force between the wheels 231a to 231d of the moving part 200 and the floor surface can be increased, and the gripping force of the wheels 231a to 231d can be improved.

[0073] According to the moving unit 260 of this embodiment, the urging force of the urging members 274 that urge the wheels 231a to 231d against the floor surface can be temporarily stopped by the regulating member 275. The worker assembles the moving unit 260 and the workbench main body 100 via the fixing part 500 in a state in which the urging force of the urging members 274 that urge the wheels 231a to 231d against the floor surface is stopped by using the regulating member 275. After assembling the workbench 10, the worker can improve the grip force of the wheels 231a to 231d by using the regulating member 275 to cancel the urging force of the urging members 274. In this embodiment, a toggle clamp is used as the regulating member 275, but this is not limited to this, and other mechanisms that can temporarily stop the biasing force of the biasing member 274 can be used.

[0074] (Third embodiment) The workbench 20 of the third embodiment is configured by connecting a pair of workbench bodies 100 adjacent to each other, and when viewed from above, the moving parts 200 overlap each of the pair of workbench bodies 100, and are positioned so that when viewed from above, the moving parts 200 do not extend beyond the outer peripheral edge of the pair of workbench bodies 100.

[0075] Fig. 12 is a plan view showing an example of the configuration of the workbench 20. Fig. 13 is a side view showing an example of the configuration of the workbench 20. Fig. 14 is a front view showing an example of the configuration of the workbench 20. Fig. 15 is a cross-sectional view taken along line II-II in Fig. 14 and viewed from the direction of the arrows. Note that the same components as those in the first embodiment are given the same reference numerals and descriptions thereof will be omitted as appropriate. The workbench 20 of this embodiment includes a pair of workbench bodies 100a and 100b, and one moving part 200. The workbench bodies 100a and 100b have the same configuration as the workbench body 100 of the first embodiment. The workbench main body 100a and the workbench main body 100b correspond to an example of a main body constituent part 100Ub when the workbench 20 is made up of a plurality of workbench main bodies 100a, 100b. Furthermore, the top plate part 110 of the workbench main body 100a and the top plate part 110 of the workbench main body 100b correspond to an example of a top plate constituent part 110Ub when the workbench 20 is made up of a plurality of workbench main bodies 100a, 100b. Furthermore, the leg part 130 of the workbench main body 100a and the leg part 130 of the workbench main body 100b correspond to an example of a leg constituent part 130Ub when the workbench 20 is made up of a plurality of workbench main bodies 100a, 100b.

[0076] To connect workbench main body 100a and workbench main body 100b, the worker pulls up and rotates the connecting member 114 of workbench main body 100a that is closest to workbench main body 100b, and inserts it into the connecting hole 118 of workbench main body 100b. Similarly, the worker pulls up and rotates the connecting member 114 of workbench main body 100b that is closest to workbench main body 100a, and inserts it into the connecting hole 118 of workbench main body 100a. Therefore, as shown in FIG. 9 , the connecting members 114 of workbench main body 100a and workbench main body 100b, respectively, are connected to different workbench main bodies 100b and 100a. By connecting workbench main bodies 100a and 100b in this way, workbench main bodies 100a and 100b move as a unit.

[0077] 14, of the auxiliary leg members 191a to 191d of the workbench main body 100a and the workbench main body 100b, those that are not facing each other are set to a first state in which they extend beyond the vertical line E that passes through the outer periphery of the top board portion 110. On the other hand, the auxiliary leg members 191a to 191d that are facing each other are set to a second state in which they do not extend beyond the vertical line E that passes through the outer periphery of the top board portion 110 so as not to interfere with each other.

[0078] The moving unit 200 is fixed to the workbench main bodies 100a and 100b via the fixing unit 600. The fixing unit 600 fixes the moving unit 200 to the telescopic leg 133 side of the leg units 130 of the workbench main bodies 100a and 100b, rather than the main leg 132 side, so that the moving unit 200 always contacts the floor surface even when the height of the top panel unit 110 is adjusted. The fixing part 600 has a leg fixing part 601 , an intermediate part 603 , and a main body fixing part 604 .

[0079] The leg fixing part 601 is fixed to the telescopic leg 133 side of the leg part 130, not to the main leg 132 side. The leg fixing part 601 is a rod-shaped member extending in the front-rear direction, and is hung between a pair of horizontal members 137b positioned opposite each other at the front and rear of the workbench main body 100a, and is also hung between a pair of horizontal members 137b positioned opposite each other at the front and rear of the workbench main body 100b. Both ends of the leg fixing part 601 are fixed to the horizontal members 137b via clamp members 602. The leg fixing part 601 is also fixed to the lower end of the horizontal member 137b. In this example, the two leg fixing parts 601 are positioned apart on the left and right so as to sandwich the moving part 200 therebetween. The leg fixing part 601 does not necessarily have to be fixed to the horizontal members 137b, but may also be fixed to the telescopic leg 133. Furthermore, the leg fixing portion 601 may be fixed to a member that moves in synchronization with the telescopic leg 133 when the telescopic leg 133 is slid along the main leg 132 .

[0080] The intermediate sections 603 connect the leg fixing sections 601 and the main body fixing section 604. Two intermediate sections 603 are fixed to each of the pair of leg fixing sections 601. The two intermediate sections 603 are fixed to positions spaced apart in front and behind the leg fixing section 601, and extend upward from the leg fixing section 601.

[0081] The main body fixing part 604 is fixed to the housing 211 of the main body part 210 of the moving part 200. The main body fixing part 604 is a rod-shaped member extending in the left-right direction, and is bridged over a pair of intermediate parts 603 positioned opposite each other on the left and right. A central part of the main body fixing part 604 is fixed to the upper surface of the housing 211 of the main body part of the moving part 200 via a clamp member 605. Here, the two main body fixing parts 604 are located directly above the housing 211, and extend so as to protrude beyond the housing 211 in the left-right direction.

[0082] The moving part 200 is fixed by the fixing part 600 at a position spanning the workbench main body 100a and the workbench main body 100b. When viewed from above, the moving part 200 overlaps each of the pair of workbench main bodies 100, and is positioned so as not to protrude from the combined outer periphery of the pair of workbench main bodies 100 when viewed from above. By positioning the moving part 200 so as not to protrude from the outer periphery of the top plate part 110 when viewed from above, it is possible to prevent the moving part 200 from coming into contact with surrounding objects or passersby coming into contact with the moving part 200 when the workbench main body 100a and the workbench main body 100b move.

[0083] Because the moving unit 200 is fixed to the workbench bodies 100a, 100b via the fixing unit 600 in this way, when the moving unit 200 moves, the workbench bodies 100a, 100b move integrally in sync with the moving direction of the moving unit 200. In other words, the moving unit 200 can move the workbench bodies 100a, 100b along the floor surface in response to instructions from the worker. Note that the fixing unit 600 is not limited to the above-mentioned configuration as long as it is configured to be able to fix the moving unit 200 to the workbench bodies 100a, 100b.

[0084] According to the workbench 20 of this embodiment, the moving unit 200 moves the workbench main bodies 100a, 100b in accordance with the instructions of the worker, so the worker does not need to move the workbench main bodies 100a, 100b himself or line up the workbench main bodies 100a, 100b over a wide area in advance, thereby improving the overall efficiency of work at height. Furthermore, the workbench 20 of this embodiment can ensure a wide working area because the workbench main body 100a and the workbench main body 100b are connected. Note that the workbench 20 of this embodiment does not include the ladder section 300 and the auxiliary handrail section 400, but the auxiliary handrail section 400 or the ladder section 300 may be attached so as to surround the working area formed by the combined workbench main bodies 100a and 100b. Also in this embodiment, the workbench 20 can be assembled in the same manner as the first and second assembly methods described in the first embodiment by gradually lowering the connected workbench bodies 100a, 100b from above the moving part 200.

[0085] (Fourth embodiment) The workbench 30 of the fourth embodiment is a pair of workbench bodies 100 connected adjacent to each other, and when the workbench body 100 is moved along the floor surface while the worker is resting on it, the worker does not wobble.

[0086] Figure 16 is a diagram showing the configuration of the workbench 30 of the fourth embodiment. Note that the same components as those of the third embodiment are given the same reference numerals and their explanations are omitted as appropriate. In addition, in Figure 16, the auxiliary handrail section 400 is indicated by a two-dot chain line. The workbench 30 has a support member 40 that can be grasped by the hand of a worker standing on the top panel portion 110. The support member 40 is erected approximately in the center of the working area formed by the pair of workbench bodies 100. In this embodiment, the support member 40 is located at or near the boundary between the workbench bodies 100a and 100b.

[0087] The support member 40 is a rod-shaped member that is long in the vertical direction, and its upper end is located above the height of the auxiliary handrail portion 400. The support member 40 has a height of, for example, 1000 mm to 1700 mm from the top plate portion 110. The support member 40 is, for example, a cylindrical member with a diameter of 40 mm to 70 mm, and a metal pipe can be used. The support member 40 is colored a different color from the surface of the top plate portion 110 so that it can be easily seen and grabbed when the worker becomes unsteady. If the surface color of the top plate portion 110 is silver, for example, the support member 40 is preferably colored a highly saturated warm color such as yellow, red, or orange to increase the visibility of the outer circumferential surface of the support member 40.

[0088] FIG. 17 is a perspective view showing a state in which the support member 40 is detachably attached to the top panel portion 110. As shown in FIG. The support member 40 has a flange portion 41 and a mounting shaft 42 . When the support member 40 is attached to the top plate 110, the lower surface of the flange 41 comes into contact with the upper surface of the top plate 110, increasing the contact area, thereby keeping the support member 40 in a stable state. The mounting shaft 42 is a male screw that extends downward from the lower end of the flange portion 41 (or the support member 40).

[0089] Meanwhile, the top plate portion 110 of the workbench main body 100a and the top plate portion 110 of the workbench main body 100b are formed with insertion holes 113, and female threads (not shown) are provided within the insertion holes 113. Therefore, an operator can insert the mounting shaft 42 of the support member 40 into the insertion hole 113 and rotate the support member 40 about its axis, thereby threading the male thread of the mounting shaft 42 and the female thread of the insertion hole 113 together, and attach the support member 40 to the top plate portion 110. Meanwhile, an operator can rotate the support member 40 in the opposite direction about its axis, thereby disengaging the male thread of the mounting shaft 42 from the female thread of the insertion hole 113, and remove the support member 40 from the top plate portion 110.

[0090] In this way, in the workbench 30, the support member 40, which is to be grasped by the hand of a worker standing on the top panel 110, is located approximately in the center of the working area of ​​the top panel 110. Therefore, when the workbench bodies 100a, 100b move synchronously as the moving part 200 moves, the worker can grasp the support member 40 by hand, thereby preventing or suppressing the worker from wobbling on the top panel 110. Furthermore, by positioning the support member 40 approximately in the center of the working area of ​​the top panel 110, when the operator operates the operation unit 240, the operator stands near the center rather than on the edge of the top panel 110, which can reduce the effect of centrifugal force that the operator receives when the moving unit 200 moves. Furthermore, by having the operator stand near the center, the operator's weight can be distributed approximately evenly to the wheels 231a to 231d of the moving unit 200, which can improve the operability of the moving unit 200. Furthermore, since the support member 40 is detachable, if it gets in the way when a worker is working at height, the worker can remove it, making it easier to work at height.

[0091] In this embodiment, the support member 40 is described as being attached and detached by screwing together a male screw and a female screw, but this is not limiting, and attachment and detachment methods using other mechanisms may also be used. In addition, in this embodiment, the support member 40 is described as being located at or close to the boundary between the workbench main body 100a and the workbench main body 100b, but if the workbench is composed of a single workbench main body 100, the support member 40 can be positioned approximately in the center of the top plate portion 110 of the workbench main body 100.

[0092] The present invention has been described above using the above-mentioned embodiments, but the present invention is not limited to only the above-mentioned embodiments, and modifications and the like are possible within the scope of the present invention, and the respective embodiments may be combined as appropriate.

[0093] In the above-described embodiment, the moving unit 200 is equipped with four wheels 231a-231d, each of which has a plurality of barrel-shaped rollers 232 centered in the axial direction of the axle, that is, a so-called Mecanum wheel. However, this is not limited to this. For example, the moving unit 200 may be equipped with four wheels, or may be equipped with a so-called omniwheel, that is, three wheels arranged at the vertices of a triangle when viewed from above. In addition, the configuration of the moving unit 200 is not limited as long as it is configured to be movable in any direction within 360°.

[0094] In the above embodiment, the casters 181a to 181d have two wheels 183, but the present invention is not limited to this and may have only one wheel 183. In the above-described embodiment, the leg members 131a to 131d have the telescopic legs 133, but this is not limiting and they may not have the telescopic legs 133. If the leg members 131a to 131d do not have the telescopic legs 133, the moving unit 200 can be fixed via the fixing unit 500 to the main leg 132 side, for example, to the cross member 137a.

[0095] In the above-described embodiment, the connecting member 114 is described as being roughly V-shaped or roughly V-shaped when viewed from above, but this is not limited to this case and any shape is acceptable as long as it is curved in a way that prevents interference between the connecting members 114 of adjacent workbench bodies 100. In the above-described embodiment, the auxiliary grounding portion is separated from the floor surface in the first state, but this is not limitative and the auxiliary grounding portion may be in contact with the floor surface.

[0096] In the above-described embodiment, the case where two workbench bodies 100a, 100b are connected has been described, but three, four, five, six or more workbench bodies 100a, 100b may be connected to form one moving part 200. In addition, the two workbench bodies 100a, 100b are not limited to being separate bodies, but may also be integrated.

[0097] In the above-described embodiment, the moving unit 200 includes the operating unit 240. However, the moving unit 200 may also move the workbench main body 100 along the floor surface in response to a voice command from the worker. In this case, the control unit 212 of the moving unit 200 receives a voice command from the worker, such as "move forward." In response to the command, the control unit 212 transmits a control signal to the motor drivers 217a to 217d to rotate the wheels 231a to 231d forward, thereby causing the workbench main body 100 to move forward. On the other hand, upon receiving a voice command from the worker, such as "stop," the control unit 212 stops the control signal sent to the motor drivers 217a to 217d that are rotating the wheels 231a to 231d forward, thereby stopping the forward movement.

[0098] In the above-described embodiment, the operation unit 240 is a joystick type, but the present invention is not limited to this and other types of controllers may be used. For example, the operation unit 240 may be a push-button type controller or a touch panel controller of a portable communication device such as a smartphone or tablet.

[0099] In this embodiment, a case has been described in which the workbench is equipped with a workbench main body 100 and a moving unit that moves the workbench main body 100 along the floor surface in accordance with the instructions of the worker while the worker is still seated on the workbench main body 100, but this is not limited to this case and can be modified as appropriate depending on the task, etc. [Explanation of symbols]

[0100] 10, 20: Mobile workbench 100, 100a, 100b: Workbench body 100Ua, 100Ub: Body component 110: Top plate 110Ua, 110Ub: Top plate component 130: Leg 130Ua, 130Ub: Leg component 131a to 131d: Leg member 132: Main leg 133: Telescopic leg 180: Running part 181a to 181d: Caster 200: Moving part 210: Main body 230: Wheel part 240: Operation part 500, 600: Fixed part 40: Support member

Claims

1. A mobile workbench comprising a main body component consisting of one workbench body or a plurality of workbench bodies, and a moving unit that moves the main body component, the main body component includes a top board component serving as a foothold and a leg component supporting the top board component and being grounded on a floor surface; The top plate constituent part is disposed at the upper end of the leg constituent part, the moving unit is positioned so as to overlap the top plate constituent unit when viewed from above, and includes a wheel unit including a plurality of wheels, and a control unit disposed within a housing and controlling the driving of the wheel unit; A mobile workbench characterized in that the control unit drives the wheel unit based on an instruction signal including directional information corresponding to an operator's instruction transmitted from the operation unit, thereby moving the main body component in all directions along the floor surface.

2. 2. The mobile workbench according to claim 1, wherein the leg components are positioned so as to overlap the top plate component when viewed from above and not to extend beyond the outer periphery of the top plate component.

3. The moving unit is 3. The mobile workbench according to claim 1, wherein the main body component is rotated about a vertical axis in response to an instruction from an operator.

4. the moving unit has the operation unit, The operation unit includes:

3. The mobile workbench according to claim 1, wherein the workbench can be operated with a worker still resting on the top plate component.

5. a support member that can be grasped by an operator standing on the top plate constituent part is provided at approximately the center of a working area of ​​the top plate constituent part; 5. The mobile workbench according to claim 4, wherein the support member is detachable from the top plate component.

6. The leg constituent part is a main landing gear and a telescopic leg that is slidable along the main landing gear; 3. The mobile workbench according to claim 1, wherein the moving part is fixed to the telescopic leg or to a member that moves in synchronization with the telescopic leg when the telescopic leg slides via a detachable fixing part.

7. The mobile workbench according to claim 6, wherein at least a portion of the fixed portion is located directly above the movable portion.

8. The mobile workbench according to claim 6, characterized in that the moving part is fixed to the telescopic leg or a member that moves in synchronization with the telescopic leg when the telescopic leg slides via the fixed part while bearing part of the load of the main body component.

9. The moving unit is Multiple wheels and a biasing member that biases the plurality of wheels against a floor surface; 3. The mobile workbench according to claim 1, further comprising a regulating member that temporarily stops the biasing force of the biasing member.

10. A mobile workbench as described in claim 1 or 2, characterized in that it is provided with a fixing part that fixes the moving part to the main body component part.

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