Mobile Work Table

Abstract

To provide a mobile workbench that can prevent tilting.SOLUTION: A mobile workbench 100 includes a top plate portion 110, a leg portion 130 arranged so as to overlap the top plate portion 110 when viewed from above, and an auxiliary grounding portion 200 arranged so as to protrude from the outer peripheral edge of the top plate portion 110 when viewed from above. The auxiliary grounding portion 200 has a grounding portion 213 that touches the floor surface. The grounding portion 213 has a plurality of protruding portions 214 that protrude toward the floor surface.SELECTED DRAWING: Figure 7

Description

[Technical field]

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

[0002] Mobile work platforms for working at heights have been known for some time. Patent Document 1 discloses a work platform that includes a top plate, main legs, and extendable legs, and the main legs are arranged so as to overlap with the top plate when viewed from above. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-181343 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the workbench of Patent Document 1, there is a risk that the workbench may tilt when a force is applied from above to the outer periphery of the top plate. The present invention has been made in consideration of the above-mentioned problems, and has an object to provide a mobile workbench that can be prevented from tipping over. [Means for solving the problem]

[0005] The mobile workbench of the present invention comprises a top plate portion, a leg portion arranged so as to overlap the top plate portion when viewed from above, and an auxiliary grounding portion arranged to extend beyond the outer periphery of the top plate portion when viewed from above, and the auxiliary grounding portion is an auxiliary leg member that can transition between a first state in which the auxiliary leg protrudes from the outer circumferential edge when viewed from above and a second state in which the auxiliary leg protrudes from the outer circumferential edge when viewed from above and is aligned substantially vertically by rotating about a pivot pin of the holding member; having The auxiliary leg member is The device has a grounding portion that is grounded on a floor surface, the grounding portion comprising: When the auxiliary leg member is in the first state, A plurality of protruding portions protruding toward a floor surface, When the auxiliary leg member is in the first state, When viewed from below, the outline of the grounding portion is as follows: A shape in which the width of the ground contact portion decreases toward one side that is parallel to the outer periphery and is located on the outer periphery side. It is characterized in that: Effect of the Invention

[0006] According to the present invention, it is possible to provide a mobile workbench that can be prevented from tipping over. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram illustrating an example of a configuration of a workbench system. [Diagram 2] FIG. 1 is a plan view showing an example of the configuration of a mobile workbench according to a first embodiment. [Diagram 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 the mobile workbench. [Diagram 5] FIG. 2 is a front view showing an example of the mobile workbench in a folded state. [Figure 6] FIG. 4 is a front view showing an example of a configuration of an auxiliary leg member. [Figure 7] 10 is a side view showing an example of a configuration of an auxiliary leg member. FIG. [Figure 8] FIG. 4 is a diagram showing an example of a configuration of a seat portion. [Figure 9] 13A and 13B are diagrams illustrating an example of the configuration of another ground portion. [Figure 10] FIG. 1 is a plan view showing an example of a state in which two mobile work tables are connected. [Figure 11] FIG. 11 is a side view showing an example of a state in which two mobile work tables are connected. [Figure 12] FIG. 11 is a side view showing an example of the configuration of the mobile workbench of the second embodiment. [Figure 13] FIG. 11 is a side view showing an example of the configuration of the mobile workbench of the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, the mobile workbench according to this embodiment will be described with reference to the drawings. (First embodiment) The mobile work platform 100 is a work platform for a worker to work at height. The mobile work platform 100 (work platform 100) of this embodiment is assumed to have a height of, for example, about 1000 mm to about 1500 mm from the floor surface to a top plate portion 110 described later. The workbench 100 can be used by a worker alone, or a plurality of workbenches 100 can be connected together to be used as a workbench system 10. First, the configuration of the workbench system 10 will be described.

[0009] FIG. 1 is a diagram showing an example of the configuration of a workbench system 10. As shown in FIG. The workbench system 10 of this embodiment includes a workbench 100 (100a, 100b), a bridge 20 (20a to 20c), and an auxiliary handrail portion 30 (30a, 30b). The work platforms 100a and 100b are arranged in parallel, facing the same direction, at a distance from each other. The bridges 20 (20a to 20c) are arranged between the end of the long side of the work platform 100a and the end of the long side of the work platform 100b. The bridges 20 function as a so-called scaffolding. In other words, there is no member supporting the bridge 20 between the bridge 20 and the floor surface, and the work platforms 100a and 100b support the bridge 20. Here, the three bridges 20a to 20c are arranged in parallel with no gaps. The auxiliary handrail section 30 is attached to the work platform 100 or the bridge 20 as necessary to surround the work area. When a worker is working in the work area, a part of the worker's body comes into contact with the auxiliary handrail section 30, so that the worker can recognize that he or she is at the end of the work area. Here, an auxiliary handrail section 30a is arranged which approximately matches the short-side length of the work platform 100, and an auxiliary handrail section 30b which approximately matches the longitudinal length of the work platform 100 or the longitudinal length of the bridge 20.

[0010] In the workbench system 10, a wide work area can be secured by connecting multiple workbenches 100 or connecting them with a bridge 20. Therefore, a worker does not need to move the workbench 100 when working in a different position. Furthermore, multiple workers can work at the same time. In this way, working using the workbench system 10 can improve work efficiency. In addition, when configuring the workbench system 10, the number and positions of the workbenches 100 and the bridges 20 can be changed according to the work site, without being limited to the configuration of the workbench system 10 in FIG. 1. For example, the bridges 20 may be arranged between the short-side end of the workbench 100 and the short-side end of the workbench 100, or between the short-side end of the workbench 100 and the long-side end of the workbench 100. In addition, for example, the bridges 20 are available in types with longitudinal lengths of 500 mm, 1000 mm, 1500 mm, 2000 mm, 2500 mm, etc., and bridges 20 of any length may be used. Furthermore, for example, the workbench 100b may be installed adjacent to the workbench 100a without using the bridges 20.

[0011] Next, the stand-alone workbench 100 will be described. Fig. 2 is a plan view showing an example of the configuration of the workbench 100. Fig. 3 is a front view showing an example of the configuration of the workbench 100. Fig. 4 is a side view showing an example of the configuration of the workbench 100. 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. The workbench 100 has a top panel portion 110 , legs 130 , a rotating portion 150 , a running portion 180 , and an auxiliary ground contact portion 200 .

[0012] The top plate portion 110 functions as a foothold for workers performing high-altitude work. The top plate portion 110 has a rectangular shape that is long in the front-rear direction when viewed from above. The front-rear direction is, for example, about 1500 mm long, and the left-right direction is, for example, about 1000 mm long. The top plate portion 110 is formed by connecting multiple long top plate members made of, for example, an aluminum alloy. The top plate portion 110 is, for example, a metallic color such as silver. Additionally, the top panel 110 has a plurality of projections 113 as anti-slip mats on the upper surface that serves as the work surface. The projections 113 are formed at intervals across the entire surface of the top panel 110. The projections 113 protrude upward and have a hole in the center.

[0013] The top plate portion 110 also has a number of connecting members 114 at positions close to the four corners. The connecting members 114 are members that connect other adjacent work tables 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 is bent into a substantially 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 an axis extending vertically from one end of the gripping portion 116, and is biased in a direction to be accommodated in the top plate portion 110. The gripping portion 116 is bent into a substantially V-shape when viewed from above, and is held by the operator when lifting up the connecting member 114. The connecting shaft 117 is an axis extending vertically from the other end of the gripping portion 116, and connects the top plate portion 110 to other work tables 100. As shown by the solid line in the enlarged perspective view of FIG. 2, when there is no work table 100 to be connected, the base shaft 115 and the connecting shaft 117 of the connecting member 114 are housed inside the top plate portion 110. On the other hand, to connect the connecting member 114 to another work table 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 base shaft 115 around its axis to position the connecting shaft 117 outside the outer periphery of the top plate portion 110. Next, the worker can connect the other work table 100 by inserting the connecting shaft 117 into a connecting hole 118 (described later) of the other work table 100 from above.

[0014] Additionally, the tabletop portion 110 has a plurality of connecting holes 118 as connected portions in a position close to the outer periphery. The connecting holes 118 are holes for connecting to the bridge 20 or another adjacent workbench 100. For example, six connecting holes 118 are formed at the end on the long side, and for example, four connecting holes 118 are formed at the end on the short side. Additionally, the tabletop portion 110 has a plurality of handrail holes for attaching auxiliary handrail portions 30 in a position close to the outer periphery.

[0015] The legs 130 have a function of supporting the weight of the top plate 110 and the weight of a worker working on the top plate 110. The legs 130 are connected to the underside of the top plate 110 and are rotatable relative to the top plate 110. When the legs 130 rotate, the legs 130 are folded so as to overlap the top plate 110. Specifically, leg section 130 has four leg members 131a to 131d. Note that leg member 131d is not shown in Figs. 3 and 4 because it is hidden by leg members 131b, 131d. Leg members 131a, 131b are located on the rear side in the front-to-rear direction and extend from top plate section 110 toward the floor surface. 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 plate section 110 toward the floor surface. Leg members 131c and 131d are located apart from each other in the left-to-right direction.

[0016] The leg members 131 a to 131 d each have a main leg 132 and an extendable leg 133 . 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 metallic color such as silver. The main leg 132 is, for example, a hollow component having a substantially rectangular cross section.

[0017] The telescopic legs 133 are members that make the leg members 131a to 131d extend and retract along the longitudinal direction (see FIG. 7 described later). The telescopic legs 133 are fitted inside the main legs 132 and can slide 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 are a metallic color such as silver. The telescopic legs 133 extend and retract the length of the leg members 131a to 131d by changing the length that protrudes from the lower end of the main legs 132. The telescopic legs 133 also have a stopper member 134 at their lower ends. The stopper member 134 is a member that prevents the lower ends of the telescopic legs 133 from entering the main legs 132. The stopper member 134 is made of, for example, an aluminum alloy and is formed by extrusion molding. The stopper member 134 is a metallic color such as silver. The stopper member 134 is, for example, a hollow member having a substantially rectangular cross section, and can be made of the same material as the main leg 132. The stopper member 134 is fitted onto the outer periphery of the lower end of the telescopic leg 133 and fixed using bolts, rivets, or the like. 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 stepwise, for example, between 0 mm and 400 mm at intervals of about 50 mm or about 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).

[0018] 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 mechanisms 135 are attached to positions below the center of main leg 132, on the side where leg members 131a and 131b face each other and on the side where leg members 131c and 131d face each other.

[0019] Furthermore, horizontal members 137a and 137b are provided between leg members 131a and 131b, and between leg members 131c and 131d, in the horizontal direction. The horizontal members 137a and 137b are members that improve the rigidity of leg members 131a to 131d. As shown in Fig. 4, a plurality of cross members 137a, 137b are arranged between the leg members 131a and 131b at intervals in the vertical direction. Specifically, three cross members 137a are arranged between the main leg 132 of the leg member 131a and the main leg 132 of the leg member 131b, and one cross member 137b is arranged between the telescopic leg 133 of the leg member 131a and the telescopic leg 133 of the leg member 131b. The cross member 137a is fixed to the main leg 132 via a bracket using bolts, rivets, etc. On the other hand, the cross member 137b is fixed to the stopper member 134 of the telescopic leg 133 via a bracket using bolts, rivets, etc.

[0020] The horizontal members 137a and 137b are made of, for example, an aluminum alloy and are formed by extrusion molding. The horizontal members 137a and 137b are, for example, hollow or solid members having a substantially rectangular or polygonal cross section. The horizontal members 137a and 137b are different in color. The horizontal member 137a is, for example, a metallic color such as silver, and the horizontal member 137b is, for example, gold. The horizontal member 137b is colored, for example, in an anodizing process. The reason why the horizontal member 137b is colored differently from the horizontal member 137a is to make the worker aware that the horizontal member 137b is movable. That is, since the horizontal 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 horizontal member 137b in the vertical direction. Here, the cross members 137a, 137b that are bridged between leg members 131a and 131b have been described, but cross members 137a, 137b with a similar configuration and at a similar height are also bridged between leg members 131c and 131d.

[0021] Additionally, abutment members 138 are fixed to the rear side surfaces of leg members 131a and 131b. When leg portions 130 are folded, abutment members 138 come into contact with the floor surface or with top plate portions 110 of other stacked work tables 100, thereby keeping the top plate portions 110 of the stacked work tables 100 horizontal.

[0022] In this way, the cross members 137a and 137b are bridged between the leg members 131a and 131b and between the leg members 131c and 131d, so that 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-rear direction. Therefore, when the leg portion 130 rotates relative to the top plate portion 110 as described later, the leg members 131a and 131b rotate together, and the leg members 131c and 131d rotate together.

[0023] The rotating unit 150 has a function of rotating the leg unit 130 relative to the top plate unit 110. By rotating the leg unit 130 relative to the top plate unit 110 via the rotating unit 150, the leg unit 130 changes between an open-leg posture in which the leg unit 130 extends downward and a closed-leg posture in which the leg unit 130 overlaps the top plate unit 110 and is folded. Specifically, the rotating section 150 has four rotating bodies 151a to 151d. In addition, in Fig. 3 and Fig. 4, the rotating body 151d is not shown because it is hidden by the rotating bodies 151b and 151c. The rotating bodies 151a to 151d are disposed between the leg members 131a to 131d and the top plate section 110, respectively. The rotation fulcrum P1 of the rotating bodies 151a and 151b is positioned above the rotation fulcrum P2 of the rotating bodies 151c and 151d, i.e., offset toward the top plate section 110.

[0024] The running unit 180 has a function of moving the workbench 100 to an arbitrary position while supporting the top plate unit 110 and the legs 130. The running unit 180 is connected to the lower side of the legs 130. Specifically, the running unit 180 has four casters 181a to 181d. In addition, the caster 181d is not shown in FIG. 3 and FIG. 4 because it is hidden by the casters 181b and 181c. The casters 181a to 181d are connected to the lower ends of the leg members 131a to 131d so as to be rotatable around a vertical axis. In addition, the casters 181a to 181d are casters with stoppers that can fix the rotation of the wheels according to the operation of the worker. When working at a height, the worker can safely work at a height without moving the work platform 100 by stepping on the pedal parts 195 (see FIG. 7 described later) of the casters 181a to 181d of the running unit 180 to fix the rotation of the wheels 183. In addition, the casters 181a to 181d of this embodiment each have two wheels 183 so that the work platform 100 can be easily moved.

[0025] 5 is a front view showing a closed leg state in which the legs 130 are rotated relative to the top panel 110 and folded. When folding, the top panel 110 is folded so that it touches the floor surface, so that the top panel 110, leg member 131a, and leg member 131c are stacked from the bottom. Since abutment members 138 are arranged on the leg members 131a and 131b, when another workbench 100 is stacked, the top panel 110 of the other workbench 100 can be stacked stably on the abutment members 138.

[0026] Furthermore, in the workbench 100 of this embodiment, the legs 130 do not extend completely vertically when in the open position, but are inclined relative to the vertical in order to improve stability. That is, when the workbench 100 is viewed in the left-right direction as shown in Fig. 3, the pair of legs 140A, 140B are inclined so as to move away from each other from the upper end to the lower end. Specifically, the inclination angle α on the acute angle side between the floor surface and the leg 130 is smaller than 90 degrees and larger than 80 degrees.

[0027] In this way, the leg members 131a to 131d are inclined in a direction away from the center of the top plate portion 110 as they approach the lower end, so that the legs 130 of the workbench 100 can stably support the top plate portion 110. Meanwhile, the leg members 131a to 131d extend in a substantially vertical direction when viewed from the front-rear direction. Therefore, when viewed from the front-rear direction, the leg members 131a and 131b extend in a substantially vertical direction in parallel, and the leg members 131c and 131d extend in a substantially vertical direction in parallel.

[0028] If the leg portion 130 is inclined too much, the lower ends of the leg members 131a to 131d protrude in the front-rear direction, and therefore, when the workbench 100 is to be brought close to a wall or another workbench 100, the leg members 131a to 131d interfere with the workbench 100 and the workbench 100 cannot be brought close to the wall or the other workbench 100. Therefore, in this embodiment, the leg members 131a to 131d are arranged so that, when viewed from above the workbench 100, the leg members 131a to 131d do not extend beyond a straight line E extending vertically from the outer periphery of the top plate portion 110. In other words, when viewed from above the workbench 100, the leg members 131a to 131d are arranged so that the upper ends to the lower ends of the leg members 131a to 131d overlap the top plate portion 110.

[0029] Casters 181a-181d that can rotate around a vertical axis are connected to the lower ends of the leg members 131a-131d. Even when the casters 181a-181d rotate to be positioned at the outermost position, none of the casters 181a-181d including the pedal portion 195 extend beyond the straight line E that extends vertically from the outer periphery of the top plate portion 110. In other words, the casters 181a-181d are arranged so as to overlap the top plate portion 110 when viewed from above the workbench 100.

[0030] Next, the auxiliary ground portion 200 will be described. The auxiliary grounding portion 200 functions as an outrigger that prevents the workbench 100 from tilting when a force is applied from above to the outer periphery of the top plate portion 110. Here, the auxiliary grounding portion 200 is disposed so as to protrude from the outer periphery of the top plate portion 110 when viewed from above. Specifically, the auxiliary ground contact section 200 has four auxiliary leg members 201a to 201d. Note that the auxiliary leg member 201d is not shown in Figures 3 and 4 because it is hidden by the auxiliary leg members 201b and 201c. The auxiliary leg members 201a to 201d are attached to the leg members 131a to 131d, respectively. Since the auxiliary leg members 201a to 201d each have the same configuration, only the auxiliary leg member 201a will be described here.

[0031] Fig. 6 is a front view showing an example of the configuration of the auxiliary leg member 201a, and Fig. 7 is a side view showing an example of the configuration of the auxiliary leg member 201a. The auxiliary leg member 201a is attached to the left side surface of the extendable leg 133 of the leg member 131a via a holding member 202. The holding member 202 has a pair of side walls 203 spaced apart in the front-rear direction, and a first connecting portion 204 and a second connecting portion 205 that connect the side walls 203 spaced apart in the front-rear direction to each other.

[0032] The pair of side walls 203 are substantially fan-shaped or substantially arc-shaped when viewed from the front-rear direction, and have positioning portions 206a, 206b recessed in a concave shape at the upper and side portions of the outer circumferential surface. The pair of side walls 203 also support a pivot pin 207 whose axis is aligned in the front-rear direction. The first connecting portion 204 is plate-shaped along the vertical direction. The first connecting portion 204 is joined to the left side surface of the stopper member 134 using rivets, screws, or the like, so that the holding member 202 is attached to the telescopic leg 133. The second connecting portion 205 is plate-shaped and inclined with respect to the horizontal direction. The second connecting portion 205 restricts the movement of the auxiliary leg member 201a by abutting against it. The holding member 202 is formed, for example, by bending a steel plate. The holding member 202 is, for example, a metallic color such as silver. Moreover, the holding member 202 is disposed so as not to extend beyond a straight line E that is a vertical extension of the outer periphery of the top panel portion 110. In other words, the holding member 202 is disposed so as to overlap the top panel portion 110 when viewed from above the workbench 100.

[0033] The auxiliary leg member 201 a has a main body portion 208 and a seat portion 212 . The main body 208 is a hollow member that extends linearly and has a generally rectangular cross section. The main body 208 is made of, for example, an aluminum alloy, and is formed by extrusion molding. The main body 208 is a different color from the leg members 131a to 131d, and is colored in a gold color, a fluorescent color, or another color that stands out even in dark surroundings.

[0034] The main body 208 is pivotally supported around a pivot pin 207 of the holding member 202. The main body 208 has an insertion hole 209, through which the pivot pin 207 is inserted. Since the insertion hole 209 is a long hole along the longitudinal direction of the main body 208, the main body 208 has a play corresponding to the length of the long hole. A positioning pin 210 is inserted in the front-rear direction of the main body 208 as a positioned part. Ends of the positioning pin 210 protrude beyond both side surfaces of the main body 208. Here, the pivot pin 207 and the positioning pin 210 are connected by a spring 211. Therefore, the auxiliary leg member 201a is always biased by the spring 211 in a direction approaching the holding member 202.

[0035] The seat 212 is a member that comes into contact with the floor surface. The seat 212 is made of a flexible material such as synthetic rubber or synthetic resin, for example, soft vinyl chloride. The seat 212 is a different color from the leg members 131a to 131d, and is colored orange or fluorescent, so that it stands out even in dark surroundings.

[0036] The seat portion 212 has a ground portion 213 and an attachment portion 215 . The ground contact portion 213 has a plurality of protrusions 214 on its lower surface that comes into contact with the floor. The protrusions 214 are formed so that the force for moving the leg 130 to the right in the left-right direction in the horizontal direction when the leg 130 is in contact with the floor is smaller than the force for moving the leg 130 to the left.

[0037] Figure 8 is a diagram showing an example of the configuration of the seat portion 212. Figure 8(a) is a cross-sectional view of the seat portion 212, Figure 8(b) is a cross-sectional view of the protruding portion 214, and Figure 8(c) is a view of the seat portion 212 as seen from below. As shown in Fig. 8(b), the protrusion 214 is formed to protrude obliquely to the left from the reference plane 240 of the grounding portion 213 toward the floor surface. The reference plane 240 is an imaginary plane parallel to the bottom plane 241. The bottom plane 241 is a plane where the lower tips of adjacent protrusions 214 are joined together. Note that the protrusion 214 has the shape shown in Fig. 8(b) when cut vertically at any position in the front-rear direction. Moreover, the left surface 217a and the right surface 217b of the protrusion 214 are substantially parallel. Here, the angle between the left surface 217a of the protrusion 214 and the bottom surface 241 is angle A, and the angle between the right surface 217b of the protrusion 214 and the bottom surface 241 is angle B. At this time, the protrusion 214 is formed so that the angle A is larger than the angle B. By forming the protrusion 214 in this manner, in a state in which the grounding portion 213 is in contact with the floor surface, the force for moving the leg 130 to the right in the left-right direction in the horizontal direction is smaller than the force for moving it to the left. Note that the protrusion 214 may be formed so that the angle A is larger than the angle B, and the left surface 217a and the right surface 217b of the protrusion 214 are not parallel, but approach each other as they move downward.

[0038] As shown in FIG. 8(c), the ground contact portion 213 has a rectangular shape when viewed from below, with the left-right length being longer than the front-rear length, and the corners serving as vertices are curved. Moreover, the protruding parts 214 each extend along the front-rear direction when viewed from the underside of the grounding part 213. The protruding parts 214 do not extend in a straight line along the front-rear direction, but extend along the front-rear direction in a sawtooth or wavy manner that meanders from side to side. In this way, by making the protruding parts 214 meander left and right, a turning part 218 that turns from right to left or left to right is formed. The adjacent protruding parts 214 are each approximately parallel to each other, and a groove 219 is formed between the protruding parts 214. The grounding part 213 is formed with a drainage hole 224 that communicates with a bottomed hole 225 described later.

[0039] The mounting portion 215 is a portion for mounting the seat portion 212 to the main body portion 208. As shown in Fig. 8(a), the mounting portion 215 has a bottomed hole 225, and the tip of the main body portion 208 is inserted into the bottomed hole 225. The bottomed hole 225 is formed with an abutment surface 226 that abuts against the tip of the main body portion 208. The abutment surface 226 is not parallel to the bottom surface 241, but is inclined relative to the bottom surface 241. In addition, the abutment surface 226 is not parallel to a plane perpendicular to the longitudinal direction of the main body portion 208, but is inclined relative to the plane perpendicular to the longitudinal direction. 7, the mounting portion 215 has a plurality of expandable and contractible biasing portions 216 spaced apart from one another. The biasing portions 216 contract when the seat portion 212 touches the floor surface, and generate a biasing force that tends to expand from the contracted state.

[0040] The auxiliary leg member 201a extends diagonally downward to the left from the holding member 202 toward the floor surface. The inclination angle of the auxiliary leg member 201a (inclination angle β on the acute angle side between the floor surface and the auxiliary leg member 201a) is 25 degrees to 45 degrees. If the inclination angle is less than 25 degrees, the amount by which the auxiliary leg member 201a protrudes from the top plate portion 110 increases, which affects the installation space. On the other hand, if the inclination angle is greater than 45 degrees, it is not possible to prevent the auxiliary leg member 201a from tipping over or it may interfere with the caster 181a. Further, the auxiliary leg member 201a of this embodiment is disposed so as to extend outward from a straight line E that is a vertical extension of the outer periphery of the top plate portion 110. In other words, the auxiliary leg member 201a is disposed so as to extend beyond the outer periphery of the top plate portion 110 when viewed from above the workbench 100. The auxiliary leg member 201a is held in an inclined state by the positioning pin 210 engaging with the positioning portion 206b of the holding member 202 and the main body portion 208 abutting against the second connecting portion 205. The auxiliary leg member 201a of this embodiment is not in contact with the floor surface and is held in a state in which the seat portion 212 is separated from the floor surface so that the movable workbench 100 can be easily moved.

[0041] In this way, by positioning the auxiliary leg member 201a so that it extends beyond the outer peripheral edge of the tabletop portion 110, even if force is applied from above to the outer peripheral edge of the tabletop portion 110, the ground contact portion 213 of the auxiliary leg member 201a contacts the floor surface at a position extending beyond the outer peripheral edge of the tabletop portion 110, thereby preventing the workbench 100 from tipping over.

[0042] Furthermore, the ground contact portion 213 has a plurality of protruding portions 214 that protrude toward the floor surface. The protruding portions 214 can suppress slippage between the ground contact portion 213 and the floor surface by engaging with the unevenness of the floor surface. Furthermore, the protruding portions 214 each extend along the front-rear direction when viewed from below the ground contact portion 213. Since the front-rear direction is a direction perpendicular to the direction in which slippage occurs between the ground contact portion 213 and the floor surface, it is possible to further suppress slippage between the ground contact portion 213 and the floor surface.

[0043] When the auxiliary leg member 201a touches the floor surface, the biasing portion 216 contracts, generating a biasing force that tends to expand the member. The generated biasing force acts on the floor surface, and the auxiliary leg member 201a receives a reaction force from the floor surface. Therefore, the workbench 100 is pushed back by the floor surface in the opposite direction to the direction in which it is trying to tilt, thereby preventing the workbench 100 from tilting further.

[0044] In addition, the auxiliary leg member 201a of this embodiment can transition between a first state in which it protrudes from the outer periphery of the tabletop portion 110 when viewed from above, and a second state in which it does not protrude from the outer periphery of the tabletop portion 110. Specifically, the worker pulls the auxiliary leg member 201a from the state in which the auxiliary leg member 201a extends toward the floor surface against the bias of the spring 211, thereby disengaging the positioning pin 210 from the positioning portion 206b. Next, the worker rotates the auxiliary leg member 201a upward about the pivot pin 207 of the holding member 202, thereby transitioning the auxiliary leg member 201a to a state in which it is aligned approximately vertically (see the two-dot chain line shown in FIG. 7). At this time, the auxiliary leg member 201a is held in a state in which it is aligned approximately vertically by the positioning pin 210 biased by the spring 211 engaging with the positioning portion 206a of the holding member 202. When the auxiliary leg member 201a is aligned in a substantially vertical direction, the auxiliary leg member 201a is disposed so as to overlap the leg member 131a when viewed from the front.

[0045] In this way, by making the auxiliary leg member 201a not protrude from the outer periphery of the tabletop portion 110, the workbench 100 can be moved without the auxiliary leg member 201a getting in the way even in a small space, and can be stored compactly without being bulky. Note that the worker can transition the auxiliary leg member 201a from a state in which the auxiliary leg member 201a is aligned substantially vertically to a state in which the auxiliary leg member 201a protrudes from the outer periphery of the tabletop portion 110 again by pulling the auxiliary leg member 201a against the bias of the spring 211 and rotating it downward about the pivot pin 207 of the holding member 202. Furthermore, since the auxiliary leg member 201a is attached to the extendable leg 133 of the leg member 131a, the workbench 100 can be prevented from tipping over without being affected even when the extendable leg 133 is extended or retracted to adjust the height of the top plate portion 110.

[0046] Although the auxiliary leg member 201a has been described here, the auxiliary leg members 201b to 201d have the same configuration. Specifically, the auxiliary leg member 201b has the same configuration as the auxiliary leg member 201a, and the auxiliary leg members 201c and 201d have a configuration symmetrical to the auxiliary leg member 201a. The auxiliary leg members 201b to 201d are connected to the stopper members 134 of the telescopic legs 133b to 133d of the leg members 131a to 131d, respectively. As shown in FIG. 2, the auxiliary leg members 201b to 201d are disposed protruding from the end of the longitudinal side of the top plate portion 110 when viewed from above. Therefore, even if a force is applied from above to any position of the longitudinal end of the outer periphery of the top plate portion 110, the auxiliary leg members 201b to 201d closest to the position where the force is applied contact the floor surface, thereby preventing the workbench 100 from tilting.

[0047] Furthermore, the auxiliary leg members 201a to 201d can be independently transitioned between a first state and a second state. Therefore, the operator can select whether to put each of the auxiliary leg members 201a to 201d into the first state or the second state depending on the installation space of the workbench 100.

[0048] Here, the configuration of the other grounding parts will be described with reference to Figures 9(a) to (d). Note that the same components as those of the grounding part 213 shown in Figure 8 are given the same reference numerals and the description thereof will be omitted as appropriate. The ground contact portion 250 shown in Fig. 9(a) has two grooves 251 formed along the left-right direction. The two grooves 251 are separated from each other in the left-right direction. Therefore, the protrusion 214 is divided by the grooves 251. By forming the grooves 251 along the left-right direction in this manner, it is possible to suppress slippage in the front-rear direction between the ground contact portion 250 and the floor surface.

[0049] The ground contact portion 260 shown in FIG. 9(b) has an outer shape that is longer in the left-right direction than in the front-rear direction when viewed from below. The ground contact portion 260 has a circular shape, specifically an elliptical shape, with the length in the front-rear direction being longer. The length in the front-rear direction (width of the ground contact portion) of the ground contact portion 260 decreases from approximately the center toward the right side. Also, the length in the front-rear direction (width of the ground contact portion) of the ground contact portion 250 decreases from approximately the center toward the left side. In this way, by making the length in the front-rear direction (width of the ground contact portion) of the ground contact portion 260 smaller toward the right and left side, obstacles present at the work site can be avoided. In the above description, the ground contact portion 260 has a length (width) in the front-rear direction that decreases from approximately the center toward the right and left sides, but the present invention is not limited to this case, and the length (width) in the front-rear direction may be formed so as to decrease from approximately the center toward the right or left sides. The circular shape also includes an oval shape in which the opposing sides of a rectangle are curved in a convex shape.

[0050] The ground contact portion 270 shown in Fig. 9(c) has a rectangular outer shape, specifically a trapezoid, when viewed from below. The length of the ground contact portion 270 in the front-rear direction (the width of the ground contact portion) decreases from the right side to the left side. In this way, by decreasing the length of the ground contact portion 270 in the front-rear direction (the width of the ground contact portion) toward the left side, obstacles present at the work site can be avoided. In addition, the ground contact portion 270 has been described as having a front-to-rear length (width of the ground contact portion) that decreases from the right side to the left side, but this is not limited to this case, and the ground contact portion 270 may be formed so that the front-to-rear length (width of the ground contact portion) decreases from the right side to the left side.

[0051] The ground contact portion 280 shown in FIG. 9(d) has a quadrangular outer shape, specifically a substantially square shape, when viewed from below.

[0052] The grounding part is not limited to the shapes in Figures 8 and 9, and may be a combination of a part of the shape of the grounding part in Figures 8 and 9 with a part of the shape of another grounding part. The grounding part is not limited to a quadrangle, and may be another polygonal shape (e.g., a triangle, a pentagon, a hexagon, etc.). In this case, the corners that are the vertices of the polygon may be curved so as to be chamfered.

[0053] Next, an example of using the auxiliary leg members 201a-201d when two work tables 100 configured as described above are connected will be described with reference to Figures 10 and 11. Here, the work tables 100a, 100b are installed with their longitudinal ends parallel to each other. Fig. 10 is a plan view of the two linked work tables 100a and 100b, and Fig. 11 is a side view of the two linked work tables 100a and 100b.

[0054] When connecting the workbenches 100a and 100b, the worker lifts up the connecting member 114 of the workbench 100a that is close to the workbench 100b, rotates it, and inserts it into the connecting hole 118 of the workbench 100b. Similarly, the worker lifts up the connecting member 114 of the workbench 100b that is close to the workbench 100a, rotates it, and inserts it into the connecting hole 118 of the workbench 100a. Therefore, as shown in FIG. 10, the connecting members 114 of the workbenches 100a and 100b are connected to the different workbenches 100b and 100a. In this way, by connecting the workbenches 100a and 100b, the other workbench also moves in response to the movement of one workbench, so that the entire workbench system can be easily moved. Note that the connecting member 114 is bent in an approximately V-shape or an approximately V-shape when viewed from above, so that the connecting members 114 can be prevented from interfering with each other when connected.

[0055] 10 and 11, the worker sets the auxiliary leg members 201a-201d of the workbenches 100a and 100b that are not facing each other to a state in which they protrude from the outer periphery of the tabletop portion 110. On the other hand, as shown in Fig. 11, the worker sets the auxiliary leg members 201a-201d that are facing each other to a state in which they do not protrude from the outer periphery of the tabletop portion 110 so as not to interfere with each other. In this way, by selecting whether the auxiliary leg members 201a-201d are in the first state or the second state, it is possible to accommodate various installations of the workbenches 100a and 100b.

[0056] In the present embodiment, the auxiliary leg members 201a to 201d of the auxiliary grounding section 200 are arranged to protrude from the long side end of the top plate section 110 when viewed from above, but this is not limited to this case. The auxiliary grounding section 200 may have a separate auxiliary leg member arranged to protrude from the short side end of the top plate section 110. In addition, in the present embodiment, the auxiliary grounding section 200 has four auxiliary leg members 201a to 201d, but this is not limited to this case. For example, at least two auxiliary leg members may be arranged to protrude from opposing sides of the outer periphery of the top plate section 110 when viewed from above.

[0057] Second embodiment Next, a second embodiment will be described. The workbench 101 of this embodiment has an auxiliary grounding portion 220 that is adjustable in the amount of projection from the outer periphery of the top plate portion 110. 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. FIG. 12 is a side view showing an example of the configuration of the workbench 101. As shown in FIG. The auxiliary grounding section 220 has auxiliary leg members 221a to 221d. The auxiliary leg members 221a to 221d are attached to the extendable legs 133 of the leg members 131a to 131d, respectively. Note that in Fig. 12, the auxiliary leg members 221c and 221d are hidden by the auxiliary leg members 221a and 221b and are not shown. Since the auxiliary leg members 221a to 221d each have the same configuration, only the auxiliary leg member 221a will be described here.

[0058] The auxiliary leg member 221a is attached to the telescopic leg 133 of the leg member 131a via the telescopic member 222. The telescopic member 222 is a member that telescopically expands and contracts along an extension line of the horizontal member 137b. The telescopic member 222 fits inside the horizontal member 137b and can slide stepwise along the longitudinal direction of the horizontal member 137b. The telescopic member 222 is made of, for example, an aluminum alloy, and is formed by extrusion molding. The telescopic member 222 is a different color from the leg members 131a to 131d, and is given a color such as gold or fluorescent color that stands out even in dark surroundings. The auxiliary leg member 221a also has a seat portion 223. The seat portion 223 can be configured in the same manner as the seat portion 212 of the first embodiment.

[0059] The auxiliary leg member 221a in this embodiment is disposed so as to extend outward from a straight line E extending vertically from the outer periphery of the tabletop portion 110. In other words, the auxiliary leg member 221a is disposed so as to extend beyond the outer periphery of the tabletop portion 110 when viewed from above the workbench 100. In this way, by positioning the auxiliary leg member 221a so that it extends beyond the outer peripheral edge of the tabletop portion 110, even if force is applied from above to the outer peripheral edge of the tabletop portion 110, the auxiliary leg member 221a touches the floor surface at a position extending beyond the outer peripheral edge of the tabletop portion 110, thereby preventing the workbench 101 from tipping over.

[0060] In addition, the auxiliary leg member 221a of this embodiment can adjust the amount of protrusion from the outer periphery of the tabletop portion 110 by extending and retracting the extendable member 222 in stages along the cross member 137b. Therefore, by extending and retracting the extendable member 222, the worker can maximize the effect of preventing the workbench 101 from tipping over according to the installation space of the workbench 101. The auxiliary leg member 221a may be capable of transitioning to a second state in which it does not protrude from the outer periphery of the top panel portion 110 by contracting the expandable member 222.

[0061] Furthermore, the auxiliary grounding portion 220 is not limited to the auxiliary leg member 221a, but may be an auxiliary caster extending from the end of the expandable member 222 toward the floor surface. In this case, it is preferable that the auxiliary leg member is not in contact with the floor surface and is kept away from the floor surface in order to easily move the workbench 101.

[0062] (Third embodiment) Next, a third embodiment will be described. The workbench 102 of this embodiment has an auxiliary grounding portion 230 attached to the main leg 132 of the leg members 131a to 131d of the top board portion 110. 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. FIG. 13 is a side view showing an example of the configuration of the workbench 102. As shown in FIG. The auxiliary grounding section 230 has four auxiliary leg members 231a to 231d. The auxiliary leg members 231a to 231d are attached to positions closer to the upper ends than the lower ends of the main legs 132 of the leg members 131a to 131d, respectively. Note that the auxiliary leg members 231c and 231d are hidden by the auxiliary leg members 231a and 231b and are not shown in Fig. 13. Since the auxiliary leg members 231a to 231d each have the same configuration, only the auxiliary leg member 231a will be described here.

[0063] The auxiliary leg member 231a is attached to the main leg 132 of the leg member 131a via a holding member 232. The holding member 232 is disposed so as not to extend beyond a straight line E that extends vertically from the outer periphery of the top panel portion 110 to the outside. The auxiliary leg member 231a is made of, for example, an aluminum alloy, and is formed by extrusion molding. The auxiliary leg member 231a is a different color from the leg members 131a to 131d, and is given a color such as gold or fluorescent color that stands out even in dark surroundings. The auxiliary leg member 231a has a rockable seat 234 at its lower end. The bottom surface of the seat 234 can be configured similarly to the seat 212 of the first embodiment.

[0064] The auxiliary leg member 231a is pivotally supported by the holding member 232 so as to be rotatable in the left-right direction. The worker can position the auxiliary leg member 231a so as to protrude from the outer periphery of the tabletop 110 by rotating it via the holding member 232 so as to tilt it toward the floor surface. The worker can also position the auxiliary leg member 231a so as not to protrude from the outer periphery of the tabletop 110 by rotating it via the holding member 232 so as to be in a substantially vertical direction (see the two-dot chain line shown in FIG. 13).

[0065] Further, the auxiliary leg member 231a has an auxiliary telescopic leg 233. When the auxiliary leg member 231a is disposed so as to extend beyond the outer peripheral edge of the tabletop portion 110, the worker can extend the auxiliary telescopic leg 233 to bring the lower end of the auxiliary telescopic leg 233 into contact with or close to the floor surface. Furthermore, when the worker extends the leg member 131a using the telescopic leg 133 to adjust the tabletop portion 110 so as to be higher, the worker can extend the auxiliary telescopic leg 233 to bring the lower end of the auxiliary telescopic leg 233 into contact with or close to the floor surface.

[0066] The present invention has been described above using the above-mentioned embodiments, but the present invention is not limited to 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.

[0067] In the above-described embodiment, the auxiliary leg members 201a to 201d are held in their positions by the positioning pin 210 engaging with the positioning portions 206a, 206b. However, this is not limited to the above, and the auxiliary leg members 201a to 201d may be held using other mechanisms. In the above embodiment, the casters 181a to 181d each have two wheels 183. However, the present invention is not limited to this, and each caster may have only one wheel 183. In the above embodiment, the leg members 131a to 131d have the extendable legs 133. However, the present invention is not limited to this, and the leg members 131a to 131d do not necessarily have to have the extendable legs 133.

[0068] In the above embodiment, the leg portion 130 is inclined with respect to the vertical direction. However, the present invention is not limited to this case, and the leg portion 130 does not have to be inclined with respect to the vertical direction. In the above-described embodiment, the connecting member 114 is described as being roughly L-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 so as to prevent interference between the connecting members 114 of adjacent workbenches 100. In the above embodiment, the seat portion 212 is separated from the floor surface. However, the present invention is not limited to this, and the seat portion 212 may be in contact with the floor surface. In the above-described embodiment, the ground contact portion 213 has the protruding portion 214. However, the present invention is not limited to this case, and the ground contact portion 213 may not have the protruding portion 214 and may be a flat surface. In this embodiment, the auxiliary grounding portions 200, 220, 230 are disposed so as to protrude from the outer periphery of the top plate portion 110. However, this is not limited to this case, and can be modified as appropriate depending on the problem or the like. [Explanation of symbols]

[0069] 100: Mobile workbench 110: Top plate portion 114: Connection member 118: Connection hole 130: Leg portion 131a-131d: Leg member 134: Telescopic leg 180: Running portion 181a-181d: Caster 200: Auxiliary grounding portion 201a-201d: Auxiliary leg member 213: Grounding portion 214: Protruding portion 216: Pressing portion 220: Auxiliary grounding portion 221a-221d: Auxiliary caster 230: Auxiliary leg member 231a-231d: Auxiliary leg member

Claims

1. A top plate portion, A leg portion arranged so as to overlap the top plate portion when viewed from above; an auxiliary grounding portion disposed protruding from an outer circumferential edge of the top plate portion when viewed from above; the auxiliary grounding portion has an auxiliary leg member that can transition between a first state in which it protrudes from the outer circumferential edge when viewed from above and a second state in which it rotates about a pivot pin of a holding member and is aligned substantially vertically, the auxiliary leg member has a grounding portion that is in contact with a floor surface, the ground contact portion has a plurality of protrusions that protrude toward a floor surface when the auxiliary leg member is in the first state, A mobile workbench characterized in that when the auxiliary leg member is in the first state, the outline of the ground contact portion when viewed from below is parallel to the outer circumferential edge and has a shape in which the width of the ground contact portion becomes smaller toward one side located on the side of the outer circumferential edge.

2. A mobile workbench as described in claim 1, characterized in that when the auxiliary leg member is in the first state, the outline of the ground contact portion when viewed from below is trapezoidal.

3. The auxiliary grounding portion is disposed so as to protrude from a longitudinal end of an outer circumferential edge of the top plate portion, The plurality of protrusions include 3. The mobile workbench according to claim 1, wherein the top plate portion is formed to extend in a longitudinal direction.

4. When viewed from above, the side that does not extend beyond the outer periphery of the top plate portion is defined as one side, and the side that extends beyond the top plate portion is defined as the other side. In this state, the grounding portion is in contact with the floor surface. The plurality of protrusions include 4. The mobile workbench according to claim 1, wherein the force for moving the leg to one side is smaller than the force for moving the leg to the other side.

Images