Movable workbench

Abstract

To provide a movable workbench which can be easily moved even in a narrow passage.SOLUTION: The present invention includes a top plate part 110, a leg part 120 disposed so as to overlap the top plate part 110 when viewed from above, and a wheel part 130 disposed so as to protrude from an outer peripheral edge of the top plate part 110 when viewed from above.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Mobile work platforms for working at height have been known for some time, and it is necessary to move the mobile work platform depending on the location where the work at height is to be performed. Patent Document 1 discloses a work platform that has legs and a running part, and can be moved by tilting it in a folded state and towing it. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-188000 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the workbench disclosed in Patent Document 1 is difficult to move through, for example, a narrow passageway.

[0005] The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to make it possible to easily move even in narrow passages. [Means for solving the problem]

[0006] The present invention is characterized by comprising a top plate portion, legs arranged to overlap the top plate portion when viewed from above, and wheel portions arranged to extend beyond the outer peripheral edge of the top plate portion when viewed from above. [Effects of the Invention]

[0007] According to the present invention, it is possible to easily move the device even in a narrow passage. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view showing 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 front view showing an example of the configuration of the mobile workbench. [Figure 4] FIG. 2 is a side view showing an example of the configuration of a mobile workbench. [Figure 5] FIG. 10 is a front view showing an example of the mobile workbench in a folded state. [Figure 6] FIG. 2 is a diagram illustrating an example of the configuration of a wheel assembly according to the first embodiment. [Figure 7] FIG. 10 is a plan view showing the mobile workbench in a connected state. [Figure 8] FIG. 10 is an enlarged view of the mobile workbench in a connected state. [Figure 9] FIG. 10 is a schematic diagram showing a state in which the mobile workbench is being moved. [Figure 10] FIG. 10 is a perspective view showing an example of the configuration of a mobile workbench according to a second embodiment. [Figure 11] FIG. 10 is a diagram showing an example of the configuration of a wheel assembly according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] The mobile workbench according to the embodiment will be described below with reference to the drawings. For ease of explanation, in each drawing, the upper side is indicated as Up, the lower side as Lo, the right side as R, the left side as L, the front side as Fr, and the rear side as Rr, as necessary.

[0010] (First embodiment) The mobile work platform 100 of the first embodiment is a work platform for a worker to perform work at height, and can be moved by wheels provided on the underside of the top plate.

[0011] Fig. 1 is a perspective view showing an example of the configuration of the mobile workbench 100. Fig. 2 is a plan view showing an example of the configuration of the mobile workbench 100. Fig. 3 is a front view showing an example of the configuration of the mobile workbench 100. Fig. 4 is a side view showing an example of the configuration of the mobile workbench 100. The mobile workbench 100 includes a top plate portion 110 , legs 120 , wheels 130 , a rotating portion 140 , a running portion 150 , and an auxiliary ground contact portion 160 .

[0012] First, the top panel 110 will be described. The top panel 110 functions as a foothold for workers working at height. The top panel 110 is a base to which the legs 120 and the wheel unit 130 are attached. The top panel 110 has a generally rectangular shape that is long in the front-to-rear direction in a plan view (viewed from above). In this embodiment, the ratio of the left-to-right length of the top panel 110 to the front-to-rear length is approximately 2:3 or 1:2. Specifically, the left-to-right length of the top panel 110 is approximately 1000 mm (e.g., 700 mm to 1050 mm), and the front-to-rear length is approximately 1500 mm (e.g., 1450 mm to 1550 mm). The top panel 110 is formed by connecting multiple elongated top panel members made of, for example, an aluminum alloy. The top panel 110 has a metallic color, for example, silver. Additionally, the top panel 110 has a plurality of protrusions 111 on its upper surface, which serves as a work surface, to prevent slipping. The protrusions 111 are formed at intervals across the entire surface of the top panel 110. The protrusions 111 protrude upward and have a hole in the center.

[0013] The top panel 110 also has multiple connecting members 114 located near its four corners. The connecting members 114 are used to connect adjacent mobile work platforms 100, etc. 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 gripping portion 116, and a connecting shaft 117. The base shaft 115 is a vertical shaft extending from one end of the gripping portion 116 and is biased in a direction to be accommodated within the top panel 110. The gripping portion 116 is bent into a roughly V-shape when viewed from above, and is grasped by the operator when lifting the connecting member 114. The connecting shaft 117 is a vertical shaft extending from the other end of the gripping portion 116 and connects the top panel 110 to other mobile work platforms 100, etc. As shown by the solid line in the enlarged perspective view of FIG. 2 , when there is no mobile work platform 100 to connect to, the base shaft 115 and 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 mobile work platform 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. Next, the worker can connect another mobile work platform 100 by inserting the connecting shaft 117 into a connecting hole 112 (described later) of the other mobile work platform 100 from above.

[0014] The top plate 110 also has a plurality of connecting holes 112 as connected parts at positions close to the outer periphery. The connecting holes 112 are holes for connecting to other adjacent mobile work platforms 100, etc. Six connecting holes 112, for example, are formed at the long side end and four connecting holes 112, for example, are formed at the short side end. The top plate 110 also has a plurality of handrail holes at positions close to the outer periphery for attaching auxiliary handrail parts 30.

[0015] Next, the leg section 120 will be described. The leg section 120 has the function of supporting the weight of the top panel section 110 and the weight of a worker working on the top panel section 110. The leg section 120 is connected to the underside of the top panel section 110 and is rotatable relative to the top panel section 110. By rotating the leg section 120, the leg section 120 is folded so that it overlaps the top panel section 110. Specifically, the leg section 120 has four leg members 120a to 120d. Note that the leg member 120d is not shown in Figures 3 and 4 because it is hidden by the leg members 120b and 120c. Leg members 120a and 120b are located on the rear side in the front-to-rear direction and extend from top plate portion 110 toward the floor. Leg members 120a and 120b are located apart from each other in the left-to-right direction. Leg members 120c and 120d are located on the front side in the front-to-rear direction and extend from top plate portion 110 toward the floor. Leg members 120c and 120d are located apart from each other in the left-to-right direction.

[0016] The leg members 120a to 120d each include a main leg 121, an extendable leg 122, cross members 125a and 125b, and a contact member 126. The main leg 121 is a member mainly composed of leg members 120a to 120d. The main leg 121 is made of, for example, an aluminum alloy and is formed by extrusion molding. The main leg 121 has a metallic color such as silver. The main leg 121 is, for example, a hollow member having a substantially rectangular cross section.

[0017] The telescopic legs 122 are members that extend or retract the leg members 120a to 120d along the longitudinal direction by changing the length that they protrude from the bottom end of the main leg 121. By extending or retracting the leg members 120a to 120d using the telescopic legs 122, the height of the tabletop 110 can be adjusted. The height of the legs 120 can be adjusted in steps, for example, from 0 mm to 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). The telescopic leg 122 fits inside the main leg 121 and is slidable along the longitudinal direction of the main leg 121. The telescopic leg 122 is made of, for example, an aluminum alloy and is formed by extrusion molding. The telescopic leg 122 has a metallic color such as silver. The telescopic leg 122 is, for example, a hollow member with a substantially rectangular cross section.

[0018] The telescopic leg 122 also has a stopper member 123 at its lower end (see FIG. 4). The stopper member 123 is a member that prevents the lower end of the telescopic leg 122 from entering the main leg 121. The stopper member 123 is made of, for example, an aluminum alloy, and is formed by extrusion molding. The stopper member 123 has a metallic color, for example, silver. The stopper member 123 is also, for example, a hollow member with a substantially rectangular cross section, and the same member as the main leg 121 can be used. The stopper member 123 is fitted onto the outer periphery of the lower end of the telescopic leg 122 and fixed in place using bolts, rivets, or the like.

[0019] Furthermore, main leg 121 has locking mechanisms 124 (see FIG. 4). Locking mechanisms 124 lock in stages the length that telescopic legs 122 protrude from the bottom end of main leg 121. Locking mechanisms 124 are attached to positions below the center of main leg 121, on the side where leg members 120a and 120b face each other and on the side where leg members 120c and 120d face each other.

[0020] The cross members 125a and 125b are members that are laid across in the horizontal direction between the leg members 120a and 120b and between the leg members 120c and 120d, and that improve the rigidity of the leg members 120a to 120d. A plurality of cross members 125a, 125b are spanned between leg member 120a and leg member 120b at intervals in the vertical direction. Specifically, three cross members 125a are arranged between the main leg 121 of leg member 120a and the main leg 121 of leg member 120b, and one cross member 125b is arranged between the telescopic leg 122 of leg member 120a and the telescopic leg 122 of leg member 120b. The cross member 125a is fixed to the main leg 121 via a bracket using bolts, rivets, etc. Meanwhile, the cross member 125b is fixed to the stopper member 123 of the telescopic leg 122 via a bracket using bolts, rivets, etc.

[0021] The cross members 125a and 125b are made of, for example, an aluminum alloy and formed by extrusion molding. The cross members 125a and 125b are, for example, hollow or solid members with a substantially rectangular or polygonal cross section. The cross members 125a and 125b are different colors. The cross member 125a is a metallic color such as silver, while the cross member 125b is gold. The cross member 125b is colored, for example, during an anodizing process. The cross member 125b is a different color from the cross member 125a to alert workers that the cross member 125b is movable. Since the cross member 125b is fixed to the telescopic leg 122, the length by which the telescopic leg 122 protrudes from the main leg 121 can be changed by vertically moving the cross member 125b. Here, the cross members 125a and 125b that are bridged between the leg members 120a and 120b have been described, but the same configuration applies to the cross members 125a and 125b that are bridged between the leg members 120c and 120d.

[0022] The abutment member 126 is fixed to the rear side of the leg member 120a and the leg member 120b, and when the leg portion 120 is folded, it comes into contact with the floor surface or the top plate portion 110 of other stacked mobile workbenches 100, thereby keeping the top plate portions 110 of the stacked mobile workbenches 100 horizontal.

[0023] In this way, by bridging the cross members 125a and 125b between the leg members 120a and 120b and between the leg members 120c and 120d, the leg members 120a and 120b are configured as a single unit, i.e., the first leg body 120A, and the leg members 120c and 120d are configured as a single unit, i.e., the second leg body 120B. The leg portion 120 is arranged so that the pair of leg bodies 120A and 120B face each other in the front-to-rear direction. Therefore, when the leg portion 120 rotates relative to the tabletop portion 110 as described below, the leg members 120a and 120b rotate together, and the leg members 120c and 120d rotate together.

[0024] Next, the rotating part 140 will be described. The pivoting unit 140 has a function of pivoting the leg unit 120 relative to the top panel 110. By pivoting the leg unit 120 relative to the top panel 110 via the pivoting unit 140, the leg unit 120 changes into an open-leg posture in which the leg unit 120 extends downward, and a closed-leg posture in which the leg unit 120 overlaps the top panel 110 and is folded. Specifically, the rotating unit 140 has four rotating bodies 140a to 140d. Note that in FIGS. 3 and 4, the rotating body 140d is not shown because it is hidden by the rotating bodies 140b and 140c. The rotating bodies 140a to 140d are disposed between the leg members 120a to 120d and the top panel 110, respectively. The rotation support points P1 of the rotating bodies 140a and 140b are positioned above the rotation support points P2 of the rotating bodies 140c and 140d, i.e., offset toward the top panel 110.

[0025] Next, the running unit 150 will be described. The running unit 150 has the function of moving the mobile work platform 100 to any position while supporting the top panel 110 and the legs 120. The running unit 150 is connected to the underside of the legs 120. Specifically, the running unit 150 has four casters 150a to 150d. Caster 150d is not shown in FIGS. 3 and 4 because it is hidden by casters 150b and 150c. Casters 150a to 150d are connected to the lower ends of leg members 120a to 120d, respectively, so as to be rotatable about vertical axes. Each of casters 150a to 150d may have a stopper that can stop the rotation of the wheel in response to an operation by an operator. Each of casters 150a to 150d in this embodiment has two wheels 151 so that the mobile work platform 100 can be easily moved.

[0026] FIG. 5 is a front view showing the closed state in which the legs 120 are rotated and folded relative to the top panel 110. FIG. When the mobile workbench 100 is folded, the top panel 110 is placed in contact with the floor, so that the top panel 110, leg members 120a, and leg members 120c are stacked on top of each other from the bottom up. When the mobile workbench 100 is folded, the height TH can be reduced. Note that, because abutment members 126 are provided on the leg members 120a and 120b, when other mobile workbenches 100 are stacked, the top panel 110 of the other mobile workbench 100 can be stacked stably on top of the abutment members 126.

[0027] In the mobile work platform 100 of this embodiment, the legs 120 do not extend completely vertically when in the open position, but are inclined relative to the vertical to improve stability. That is, when the mobile work platform 100 is viewed in the left-right direction as shown in Figure 3, the pair of legs 120A, 120B are inclined so as to move away from each other from the top to the bottom. Specifically, the inclination angle α on the acute side between the floor surface and the leg 120 is greater than 80 degrees and less than 90 degrees.

[0028] In this way, the leg members 120a to 120d are inclined in a direction away from the center of the tabletop 110 as they approach the lower ends, allowing the legs 120 of the mobile workbench 100 to stably support the tabletop 110. Meanwhile, the leg members 120a to 120d extend in a substantially vertical direction when viewed from the front-to-rear direction. Therefore, when viewed from the front-to-rear direction, the leg members 120a and 120b extend in a substantially vertical direction parallel to each other, and the leg members 120c and 120d extend in a substantially vertical direction parallel to each other.

[0029] If the leg section 120 is tilted too much, the lower ends of the leg members 120a to 120d will protrude in the front-to-rear direction, and therefore when the mobile work platform 100 is moved closer to a wall or another mobile work platform 100, the leg members 120a to 120d will interfere, making it impossible to move closer to the wall or another mobile work platform 100. Therefore, in this embodiment, when viewed from above the mobile work platform 100, the leg members 120a to 120d are arranged so that they do not extend beyond a straight line E that extends vertically from the outer periphery of the top panel section 110. In other words, when viewed from above the mobile work platform 100, the leg members 120a to 120d are arranged so that the upper to lower ends of the leg members 120a to 120d overlap the top panel section 110.

[0030] Casters 150a-150d that can rotate around vertical axes are connected to the lower ends of the leg members 120a-120d. Even when the casters 150a-150d rotate and are positioned at the outermost positions, none of the casters 150a-150d extend beyond the line E that extends vertically from the outer periphery of the top panel 110. In other words, the casters 150a-150d are arranged so that they overlap with the top panel 110 when viewed from above the mobile workbench 100.

[0031] Next, the auxiliary grounding portion 160 will be described. The auxiliary grounding portion 160 functions as an outrigger that prevents the mobile work platform 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 160 is positioned so as to protrude from the outer periphery of the top plate portion 110 when viewed from above. Specifically, the auxiliary ground contact portion 160 has four auxiliary leg members 160a to 160d. Note that the auxiliary leg member 160d is not shown in Figures 3 and 4 because it is hidden by the auxiliary leg members 160b and 160c. The auxiliary leg members 160a to 160d are attached to the leg members 120a to 120d, respectively.

[0032] Next, the wheel unit 130 will be described. The wheel section 130 has the function of moving the mobile work platform 100. Specifically, the wheel section 130 has four wheel assemblies 130a to 130d. Since the wheel assemblies 130a to 130d each have the same configuration, only the wheel assembly 130a will be described.

[0033] Fig. 6 is a diagram showing an example of the configuration of the wheel assembly 130a, Fig. 6(a) is a plan view showing the configuration around the wheel assembly 130a, and Fig. 6(b) is a front view showing the configuration around the wheel assembly 130a. The wheel assembly 130 a has an axle 131 and a wheel 132 . Axle 131 rotatably holds wheel 132. Axle 131 is axially oriented in the vertical direction and is attached to top plate 110 in a state where it protrudes downward from the underside of top plate 110. Axle 131 is made of metal such as stainless steel. When a worker uses the mobile work platform 100 to work at height, the wheels 132 are separated from the floor surface. However, when the worker folds the mobile work platform 100 and moves the mobile work platform 100 with the top panel 110 in an upright position, the wheels 132 contact the floor surface and rotate while in contact with the floor surface. Here, the state in which the top panel 110 is in an upright position refers to a state in which the work surface of the top panel 110 is approximately vertical to the floor surface. The wheels 132 rotate around a rotation axis La that is approximately perpendicular to the work surface of the top panel 110. Specifically, as shown in FIG. 6(a), the wheels 132 are circular in plan view. The wheels 132 have a through-hole in the center, and the axles 131 are inserted into the through-holes to be rotatably held by the axles 131. The wheels 132 are made of, for example, synthetic resin.

[0034] As shown in FIG. 6(b), the diameter D of the wheels 132 in this embodiment is approximately 80 mm. Taking into consideration travelling performance, the diameter D of the wheels 132 is preferably 40 mm or more, and more preferably 60 mm or more. On the other hand, the diameter D of the wheels 132 is preferably 120 mm or less, and more preferably 100 mm or less, to prevent the vehicle from becoming too large. Also, as shown in FIG. 6(b), the height H of the wheels 132 in this embodiment is approximately 40 mm. Taking into consideration travelling performance, the height H of the wheels 132 is preferably 10 mm or more. On the other hand, the height H of the wheels 132 is preferably smaller than the thickness t of the top panel 110 to prevent the vehicle from becoming too large. On the other hand, the thickness of the top panel 110 in this embodiment is approximately 55 mm.

[0035] Furthermore, the wheel assembly 130a is disposed so that a large portion thereof overlaps the top panel 110 in a plan view, with a portion thereof protruding beyond the outer periphery of the top panel 110. Specifically, in a plan view, a large portion of the wheel 132 overlaps the top panel 110, with a portion of the wheel 132 protruding beyond the top panel 110. As shown in FIG. 6(a), the wheel assembly 130a protrudes from each of the short-side end and the long-side end of the top panel 110. Here, as shown in FIG. 6(a), the protrusion amounts S1 and S2 of the wheel assembly 130a from the short-side end and the long-side end are defined as S1 and S2, respectively. The protrusion amounts S1 and S2 are approximately the same, and in this embodiment, are approximately 8.5 mm. Note that the protrusion amounts S1 and S2 are preferably greater than 0 mm so that the upright top panel 110 does not come into contact with the floor, and are preferably 5 mm or greater. On the other hand, if the protrusion amounts S1 and S2 are large, it becomes difficult to place the top panel 110 close to a wall or to connect it to another mobile work platform 100, so it is preferable that they are equal to or less than a predetermined distance.

[0036] The wheel assemblies 130b to 130d are configured similarly to the wheel assembly 130a. That is, for example, in each of the wheel assemblies 130b to 130d, the wheels 132 protrude from the short-side end and the long-side end of the top panel portion 110 in a plan view.

[0037] Here, a case where the mobile work platforms 100a and 100b are connected will be described. The mobile work platforms 100a and 100b have the same configuration as the mobile work platform 100 described above. Fig. 7 is a plan view of two mobile work tables 100a and 100b connected at their longitudinal ends, and Fig. 8 is an enlarged view of the connection portion of the two connected mobile work tables 100a and 100b. When connecting the mobile work platforms 100a and 100b, the worker lifts up and rotates the connecting member 114 of the mobile work platform 100a that is closest to the mobile work platform 100b, and inserts it into the connecting hole 112 of the mobile work platform 100b. Similarly, the worker lifts up and rotates the connecting member 114 of the mobile work platform 100b that is closest to the mobile work platform 100a, and inserts it into the connecting hole 112 of the mobile work platform 100a. Therefore, as shown in FIG. 8, the connecting members 114 of the mobile work platforms 100a and 100b, respectively, are connected to the different mobile work platforms 100b and 100a. In this way, by connecting the mobile work platforms 100a and 100b, the work plane on which the worker works can be expanded. Furthermore, since the connecting members 114 are bent in a generally V-shape or a generally V-shape when viewed from above, it is possible to prevent the connecting members 114 from interfering with each other when connected.

[0038] 8, when mobile work platforms 100a and 100b are connected, a gap of a maximum distance G is formed between top plate 110 of mobile work platform 100a and top plate 110 of mobile work platform 100b so that connecting member 114 can be inserted into connecting hole 112 with ease. When mobile work platforms 100a and 100b are connected, wheel assembly 130d of mobile work platform 100a and wheel assembly 130b of mobile work platform 100b face each other. If the amount of protrusion S2 of wheel assembly 130 from top plate 110 is large, wheel assemblies 130b and 130d will interfere with each other, and the gap between top plate 110 of mobile work platform 100b and top plate 110 of mobile work platform 100b will be larger than distance G, making it impossible for connecting member 114 to be inserted into connecting hole 112. Therefore, it is preferable that the amount of protrusion S2 of the wheel unit 130 from the top plate unit 110 be equal to or less than 1 / 2 of the distance G so that the gap does not become larger than the distance G. Note that although the case where the long side ends are connected to each other has been described in Figures 7 and 8, the same applies when the short side ends are connected to each other, so it is preferable that the amount of protrusion S1 of the wheel unit 130 from the top plate unit 110 be equal to or less than 1 / 2 of the distance G.

[0039] A method for folding the mobile workbench 100 configured as above and moving it with the top panel 110 in an upright position by an operator will now be described. FIG. 9 is a schematic diagram showing the mobile work platform 100 being moved by a worker. FIG. 9(a) shows the top panel 110 in an upright position with the shorter side of the top panel 110 aligned vertically, i.e., with the longer end facing the floor. In this position, the longer end of the top panel 110 is separated from the floor, and the wheel assemblies 130a and 130c come into contact with the floor. Therefore, when the worker pushes the mobile work platform 100 in the longitudinal direction of the top panel 110 with the top panel 110 in an upright position, the wheel assemblies 130a and 130c rotate while in contact with the floor, allowing the mobile work platform 100 to be easily moved. When the mobile work platform 100 is folded and the top panel 110 is in an upright position, the thickness of the mobile work platform 100 in the direction perpendicular to the direction of movement (height TH shown in FIG. 5) can be reduced, allowing the mobile work platform 100 to be easily moved even through narrow passageways.

[0040] 9(a) illustrates a case in which the top plate 110 is erected so that the wheel assemblies 130a and 130c are in contact with the floor surface, but this is not a limitation. For example, the top plate 110 may be erected so that the wheel assemblies 130a and 130b are in contact with the floor surface, the wheel assemblies 130b and 130d are in contact with the floor surface, or the wheel assemblies 130c and 130d are in contact with the floor surface. As in this embodiment, since all four wheel units 130 protrude from the short-side end and the long-side end, the worker can erect the top plate 110 and place the wheels 132 of two of the four wheel units 130 in contact with the floor surface without considering the orientation.

[0041] 9(b) shows the state in which the top panel 110 is erected so that the longitudinal direction of the top panel 110 is in the vertical direction, i.e., so that the short end faces the floor. In the state shown in FIG. 9(b), although the dimension L1 of the mobile work platform 100 in the vertical direction is large, the dimension L2 of the mobile work platform 100 along the direction of movement can be made small. Therefore, for example, the mobile work platform 100 can be placed even in a narrow, general passenger elevator.

[0042] As described above, the mobile workbench 100 of this embodiment includes the top panel 110, the legs 120 that are arranged so as to overlap the top panel 110 when viewed from above, and the wheels 130 that are arranged to extend beyond the outer periphery of the top panel 110 when viewed from above. By having the wheels 130 that extend beyond the outer periphery of the top panel 110, the wheel sections 130 can be placed in contact with the floor when a worker folds the mobile workbench 100 and moves it with the top panel 110 in an upright position. With the top panel 110 in an upright position, the thickness of the mobile workbench 100 can be reduced, and the wheels 130 rotate while in contact with the floor, allowing the mobile workbench 100 to be easily moved even through narrow passageways.

[0043] (Second embodiment) The mobile workbench 200 of the second embodiment can be moved by wheels provided inside the top plate. Note that the same components as those in the first embodiment are given the same reference numerals and the description thereof will be omitted as appropriate. FIG. 10 is a perspective view showing an example of the external configuration of the mobile workbench 200. As shown in FIG. The mobile work platform 200 includes a top plate portion 210, legs 120, wheels 230, a rotating portion 140, a running portion 150, and an auxiliary ground contact portion 160. The mobile work platform 200 of this embodiment differs from the first embodiment in the configuration of the top plate portion 210 and wheels 230, but the other configurations are the same.

[0044] First, the top panel portion 210 will be described. The top panel 210 is a generally octagonal shape with four corners of a rectangle cut out. Furthermore, the top panel 210 is hollow at least at the four corners where the wheel units 230 are located. For example, the hollow shape can be formed by combining two top and bottom plates and side plates that are top panel members that make up the top panel 210. However, the top panel 210 may also be hollowed by arranging and joining prismatic members and cutting the four corners where the wheel units 230 are located, or a combination of these methods may be used.

[0045] Next, the wheel unit 230 will be described. The wheel section 230 has the function of moving the mobile work platform 200. Specifically, the wheel section 230 has four wheel assemblies 230a to 230d. Since the wheel assemblies 230a to 230d each have the same configuration, only the wheel assembly 230a will be described.

[0046] Figure 11 is a diagram showing an example of the configuration of the wheel assembly 230a. Figure 11(a) is a plan view showing the configuration around the wheel assembly 230a, and Figure 11(b) is a front view showing the configuration around the wheel assembly 230a. As shown in Figure 11(a), the top plate 210 has a cutout portion 211a where a corner is cut out. Similar to the wheel assembly 130a of the first embodiment, the wheel assembly 230a is disposed so that most of it overlaps with the top plate portion 210 in a plan view, with a portion of it protruding from the outer periphery of the top plate portion 210. Specifically, as shown in Fig. 11(a), the wheel assembly 230a protrudes from the short-side end by a protrusion amount S1 and from the long-side end by a protrusion amount S2. Furthermore, the wheel assembly 230a of this embodiment also protrudes outward from the cutout portion 211a in a plan view.

[0047] The wheel assembly 230 a of this embodiment includes a bolt 231 , a wheel 232 , and a nut 233 . The bolt 231 functions as an axle. The bolt 231 is axially shaped and passes through the top plate 210 in the vertical direction. The head of the bolt 231 abuts against the upper surface of the top plate 210, and the tip of the bolt protrudes from the lower surface of the top plate 210.

[0048] When a worker uses the mobile work platform 200 to perform work at height, the wheels 232 are separated from the floor surface. However, when the worker folds the mobile work platform 200 and moves the mobile work platform 200 with the top panel 210 in an upright position, the wheels 232 contact the floor surface and rotate while in contact with the floor surface. The wheels 232 of this embodiment have the same configuration as the wheels 132 of the first embodiment, but the position of the wheels 232 is different. The wheels 232 of this embodiment are disposed inside the top panel 210. Specifically, as shown in FIG. 11(b), the height H of the wheels 232 is smaller than the thickness t of the top panel 210, and the wheels 232 are disposed at a position within the thickness t of the top panel 210, i.e., between the upper and lower surfaces of the top panel 210. The wheels 232 are made of, for example, a synthetic resin.

[0049] Nut 233 has the function of fixing the axle to top plate portion 210. Nut 233 abuts against the underside of top plate portion 210 by being screwed onto a threaded portion of bolt 231 that passes through top plate portion 210 and protrudes from the underside of top plate portion 210.

[0050] In this embodiment, the wheels 232 of the four wheel assemblies 230a to 230d are colored differently depending on the type of mobile work platform 200. For example, suppose that mobile work platforms include a mobile work platform 200a whose top plate 210 is adjustable in height within a range of 700 mm to 900 mm and a mobile work platform 200b whose top plate 210 is adjustable in height within a range of 1075 mm to 1475 mm. In this case, for example, the wheels 232 of the four wheel assemblies 230a to 230d of the mobile work platform 200a may be colored green, and the wheels 232 of the four wheel assemblies 230a to 230d of the mobile work platform 200b may be colored blue. In this way, by coloring each type of mobile work platform 200 with a different color, the worker can easily distinguish the type of mobile work platform. Note that the types of mobile work platforms are not limited to those whose top plate 210 has a different height, and may also have different sizes of top plate.

[0051] In the mobile workbench 200 configured as described above, the method by which the worker folds the mobile workbench 200 and moves it with the top panel portion 210 in an upright position is the same as in the first embodiment, and the mobile workbench 200 can be easily moved even in a narrow passage. According to the mobile workbench 200 of this embodiment, the wheel unit 230 is disposed inside the top plate unit 210, and therefore no space is required for disposing the wheel unit 230 on the underside of the top plate unit 210, thereby making it possible to reduce the size of the top plate unit 210. Furthermore, since the wheel unit 230 is disposed inside the top plate unit 210 and also disposed so as to protrude from the long side end and the short side end of the top plate unit 210 when viewed from above, damage to the corners of the top plate unit 210 or the object when the corners of the top plate unit 210 come into contact with another object can be prevented or suppressed.

[0052] The present invention has been described above using various embodiments, but the present invention is not limited to the above-described embodiments, and modifications and variations are possible within the scope of the present invention, and the various embodiments and variations may be combined as appropriate.

[0053] In the above-described embodiment, the wheel unit 130, 230 of the mobile work platform 100, 200 has been described as having four wheel assemblies 130a-130d, 230a-230d. However, this is not limited to this, and the wheel unit may have two or more or three or fewer wheel assemblies. For example, if the wheel unit 130 has only two wheel assemblies 130a, 130b, the wheel assemblies 130a, 130b may be configured so that the wheels 132 protrude only from the short ends and do not protrude from the long ends. Also, for example, if the wheel unit 130 has only two wheel assemblies 130a, 130c, the wheel 132 may protrude only from the long ends and do not protrude from the short ends. Also, for example, by providing an additional wheel assemblies between the wheel assemblies located at the same end, the load of the top plate 110, 210 may be supported by three or more wheel assemblies.

[0054] Furthermore, the configuration of applying color to the wheel 232 described in the second embodiment can also be applied to the wheel 132 of the first embodiment. Furthermore, in the above-described embodiment, the case where the legs 120 are arranged so as to overlap the top panel 110 when viewed from above has been described, but this is not limited to this case, and the legs 120 do not have to be arranged so as to overlap the top panel 110. Furthermore, in the second embodiment described above, the case where the wheels 232 are arranged between the upper and lower surfaces of the top panel 210 has been described, but a portion of the wheels 232 may protrude upward from the upper surface of the top panel 210. Also, a portion of the wheels 232 may protrude downward from the lower surface of the top panel 210. In the above-described embodiment, the amount of protrusion S1 by which the wheel assemblies 130a-130d, 230a-230d protrude from the shorter end of the top panel 110, 210 and the amount of protrusion S2 by which they protrude from the longer end have been described as being substantially the same, but this is not limited to this. The wheel assemblies 130a-130d, 230a-230d may have a protrusion amount S1 greater than the protrusion amount S2, or the protrusion amount S2 may be greater than the protrusion amount S1. [Explanation of symbols]

[0055] 100, 200: Mobile work platform 110, 210: Top plate 120: Legs 130, 230: Wheels 140: Rotating section 150: Running section 121: Main landing gear 122: Telescopic legs 160: Auxiliary ground contact section 132, 232: Wheels

Claims

1. The top plate and Legs arranged to overlap the top plate when viewed from above; A mobile workbench characterized by having a wheel portion that is arranged protruding from the outer peripheral edge of the top plate portion when viewed from above.

2. The wheel portion is The mobile workbench according to claim 1, characterized in that it is positioned away from the floor when working on the mobile workbench, and is placed in contact with the floor when folding and moving the mobile workbench.

3. A mobile workbench as described in claim 1 or 2, characterized in that the wheel portion is provided on the top plate portion and is positioned extending beyond the long side end and short side end of the top plate portion when viewed from above.

4. 4. The mobile workbench according to claim 1, wherein the wheel portion rotates about a rotation axis extending in a direction perpendicular to the work surface of the top plate portion.

5. The wheel portion is 5. The mobile workbench according to claim 1, wherein the workbench is disposed inside the top plate portion.

6. The wheel portion is 6. The mobile workbench according to claim 1, wherein the wheels have different colors depending on the type of the mobile workbench.

Images