Mobile workbench

Abstract

To provide a mobile workbench which can prevent tilting.SOLUTION: A mobile workbench 100 comprises a top plate portion 110, leg portions 130 arranged so as to overlap with the top plate portion 110 when viewed from above, and auxiliary ground portions 200 arranged so as to protrude from an outer peripheral edge of the top plate portion 110 when viewed from above. The auxiliary ground portion 200 is arranged apart from a floor surface, and grounds on the floor surface when the mobile workbench 100 is about to tilt.SELECTED DRAWING: Figure 4

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 landing gear, and extendable landing gear, with the main landing gear positioned so as to overlap the top plate when viewed from above. [Prior art documents] [Patent documents]

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

[0004] However, with the workbench of Patent Document 1, there is a risk that the workbench may tip over 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 as its 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 is a mobile workbench comprising a top plate portion, legs arranged to overlap the top plate portion when viewed from above, and an auxiliary ground contact member arranged to extend beyond the outer periphery of the top plate portion when viewed from above, wherein the auxiliary ground contact member has a main body portion extending linearly and a seat portion located at the tip of the main body portion, and is held by a holding member connected to the legs, and is rotatable between an inclined state in which the main body portion extends diagonally downward from the holding member toward the floor surface and the seat portion is located at the lower side, and a vertical state in which the main body portion extends from the holding member in a substantially vertical direction and the seat portion is located above the inclined state, and the seat portion isIn the tilted state, The mobile workbench is characterized in that it is arranged away from the floor surface and comes into contact with the floor surface when it tries to tilt. [Effects 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 explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram illustrating an example of the configuration of a workbench system. [Figure 2] 1 is a plan view showing an example of the configuration of a mobile workbench according to a first embodiment. [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. 10 is a front view showing an example of the configuration of the auxiliary leg member. [Figure 7] FIG. 10 is a side view showing an example of the configuration of the auxiliary leg member. [Figure 8] FIG. 10 is a plan view showing an example of two mobile work tables connected together. [Figure 9] FIG. 10 is a side view showing an example of two mobile work tables connected together. [Figure 10] FIG. 10 is a side view showing an example of the configuration of the mobile workbench of the second embodiment. [Figure 11] FIG. 10 is a side view showing an example of the configuration of the mobile workbench of the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, the mobile workbench according to this embodiment will be described with reference to the drawings. (First embodiment) The mobile work platform 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 from the floor surface to a top plate portion 110 (described later) of, for example, approximately 1000 mm to approximately 1500 mm. The workbench 100 can be used by a worker individually, or a plurality of workbenches 100 can be connected together to form 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 workbenches 100 (100a, 100b), bridges 20 (20a to 20c), auxiliary handrail sections 30 (30a, 30b), and the like. The work platforms 100a and 100b are installed in parallel, facing the same direction and at a distance from each other. The bridges 20 (20a to 20c) are arranged between the long side end of the work platform 100a and the long side end of the work platform 100b. The bridges 20 function as a so-called scaffold. In other words, there are no support members for the bridges 20 between the bridges 20 and the floor; the work platforms 100a and 100b support the bridges 20. Here, the three bridges 20a to 20c are arranged in parallel with no gaps. The auxiliary handrail units 30 are attached to the work platform 100 or the bridges 20 as needed to surround the work area. When a worker works in the work area, the worker can recognize the end of the work area by contacting part of the worker's body with the auxiliary handrail units 30. 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 is arranged which approximately matches the long-side length of the work platform 100 or the long-side 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 bridges 20. Therefore, workers do not need to move the workbench 100 when working in different locations. Furthermore, multiple workers can work simultaneously. In this way, working using the workbench system 10 can improve work efficiency. Note that the configuration of the workbench system 10 is not limited to the configuration of the workbench system 10 shown in FIG. 1 , and the number and positions of the workbenches 100 and bridges 20 can be changed depending on the work site. For example, the bridges 20 may be arranged between the short-side ends of the workbenches 100, or between the short-side ends of the workbenches 100 and the long-side ends of the workbenches 100. Furthermore, the bridges 20 are available in various lengths, such as 500 mm, 1000 mm, 1500 mm, 2000 mm, and 2500 mm, 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 workbench 100. Fig. 3 is a front view showing an example of the configuration of workbench 100. Fig. 4 is a side view showing an example of the configuration of 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 110 , legs 130 , a rotating section 150 , a running section 180 , and an auxiliary ground contact section 200 .

[0012] The top plate 110 functions as a foothold for workers working at height. When viewed from above, the top plate 110 has a rectangular shape that is long in the front-to-rear direction. The length in the front-to-rear direction is, for example, approximately 1500 mm, and the length in the left-to-right direction is, for example, approximately 1000 mm. The top plate 110 is formed by connecting multiple long top plate members made of, for example, an aluminum alloy. The top plate 110 is, for example, a metallic color such as silver. Additionally, the top panel 110 has a plurality of protrusions 113 on its upper surface, which serves as a work surface, to prevent slipping. The protrusions 113 are formed at intervals across the entire surface of the top panel 110. The protrusions 113 protrude upward and have a hole in the center.

[0013] The top panel 110 also has multiple connecting members 114 located near the four corners. The connecting members 114 are members that connect to 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 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 an axis extending vertically 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 gripped by an operator when lifting 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 panel 110 to other work tables 100. As shown by the solid line in the enlarged perspective view of FIG. 2 , when there is no workbench 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 workbench 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 workbench 100 by inserting the connecting shaft 117 from above into a connecting hole 118 (described later) of the other workbench 100.

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

[0015] The legs 130 have the function of supporting the weight of the top panel 110 and the weight of a worker working on the top panel 110. The legs 130 are connected to the underside of the top panel 110 and are rotatable relative to the top panel 110. When the legs 130 rotate, the legs 130 are folded so that they overlap the top panel 110. Specifically, leg unit 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 and 131d. Leg members 131a and 131b are located on the rear side in the front-to-rear direction and extend from top panel 110 toward the floor. Leg members 131a and 131b are located apart from each other in the left-to-right direction. Leg members 131c and 131d are located on the front side in the front-to-rear direction and extend from top panel 110 toward the floor. Leg members 131c and 131d are located apart from each other in the left-to-right direction.

[0016] The leg members 131a to 131d 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 has 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 extend and retract the leg members 131a to 131d along the longitudinal direction (see FIG. 7, which will be described later). The telescopic legs 133 fit inside the main legs 132 and are slidable along the longitudinal direction of the main legs 132. The telescopic legs 133 are made of, for example, an aluminum alloy and formed by extrusion molding. The telescopic legs 133 have a metallic color, for example, silver. The telescopic legs 133 extend and retract the length of the leg members 131a to 131d by changing the length by which they protrude from the bottom ends of the main legs 132. The telescopic legs 133 also have stopper members 134 at their bottom ends. The stopper member 134 is a member that prevents the bottom 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 formed by extrusion molding. The stopper member 134 has a metallic color, for example, 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 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).

[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 each main leg 132, on the side where leg member 131a and leg member 131b face each other and on the side where leg member 131c and leg member 131d face each other.

[0019] Furthermore, horizontal bridge members 137a and 137b are provided between leg members 131a and 131b, and between leg members 131c and 131d. The horizontal bridge members 137a and 137b are members that improve the rigidity of leg members 131a to 131d. 4, a plurality of cross members 137a, 137b are spanned between leg member 131a and leg member 131b at intervals in the vertical direction. Specifically, three cross members 137a are arranged between the main leg 132 of leg member 131a and the main leg 132 of leg member 131b, and one cross member 137b is arranged between the telescopic leg 133 of leg member 131a and the telescopic leg 133 of leg member 131b. The cross member 137a is fixed to the main leg 132 via a bracket using bolts, rivets, etc. Meanwhile, 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 cross members 137a and 137b are made of, for example, an aluminum alloy and formed by extrusion molding. The cross members 137a and 137b are, for example, hollow or solid members with a substantially rectangular or polygonal cross section. The cross members 137a and 137b are different colors. The cross member 137a is a metallic color such as silver, and the cross member 137b is a gold color. The cross member 137b is colored, for example, during an anodizing process. The cross member 137b is a different color from the cross member 137a to alert the operator that the cross member 137b is movable. In other words, because the cross member 137b is fixed to the telescopic leg 133, the length by which the telescopic leg 133 protrudes from the main leg 132 can be changed by vertically moving the cross member 137b. Here, we have described the cross members 137a and 137b that are bridged between leg members 131a and 131b, but cross members 137a and 137b with a similar configuration and at a similar height are also bridged between leg members 131c and 131d.

[0021] In addition, a contact member 138 is fixed to the rear side surface of the leg member 131a and the leg member 131b. When the legs 130 are folded, the abutment members 138 come into contact with the floor surface or the top panels 110 of other stacked workbenches 100, thereby keeping the top panels 110 of the stacked workbenches 100 horizontal.

[0022] In this way, by bridging the cross members 137a and 137b between the leg members 131a and 131b and between the leg members 131c and 131d, the leg members 131a and 131b are configured as a single unit, i.e., first leg body 140A, and the leg members 131c and 131d are configured as a single unit, i.e., second leg body 140B. The leg portion 130 is arranged so that the pair of leg bodies 140A and 140B face each other in the front-to-rear direction. Therefore, when the leg portion 130 rotates relative to the tabletop portion 110 as described below, the leg members 131a and 131b rotate together, and the leg members 131c and 131d rotate together.

[0023] The pivoting unit 150 has a function of pivoting the leg unit 130 relative to the top panel 110. By pivoting the leg unit 130 relative to the top panel 110 via the pivoting unit 150, the leg unit 130 changes into 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 panel 110 and is folded. Specifically, the rotating unit 150 has four rotating bodies 151a to 151d. Note that in FIGS. 3 and 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 panel 110, respectively. The rotation support points P1 of the rotating bodies 151a and 151b are positioned above the rotation support points P2 of the rotating bodies 151c and 151d, i.e., offset toward the top panel 110.

[0024] The running unit 180 has a function of moving the workbench 100 to any position while supporting the top panel unit 110 and the legs 130. The running unit 180 is connected to the underside of the legs 130. Specifically, the running unit 180 has four casters 181a to 181d. Note that the caster 181d is not shown in FIGS. 3 and 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, respectively, so as to be rotatable about a vertical axis. Each of the casters 181a to 181d is equipped with a stopper that can lock the rotation of the wheel in response to an operator's operation. When working at height, the operator can lock the rotation of the wheels 183 by stepping on the pedals 195 (see FIG. 7, which will be described later) of the casters 181a to 181d of the running unit 180, thereby preventing the work platform 100 from moving and allowing the work to be performed safely at height. Each of the casters 181a to 181d in this embodiment has two wheels 183 so that the work platform 100 can be easily moved.

[0025] 5 is a front view showing the 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, so that the top panel 110, leg member 131a, and leg member 131c are stacked on top of each other from the bottom. Since abutment members 138 are provided 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 top of 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 leg position, but are inclined relative to the vertical 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 top to the bottom. Specifically, the inclination angle α on the acute 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 tabletop 110 as they approach the lower ends, which allows the legs 130 of the workbench 100 to stably support the tabletop 110. Meanwhile, the leg members 131a to 131d 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 131a and 131b extend in a substantially vertical direction parallel to each other, and the leg members 131c and 131d extend in a substantially vertical direction parallel to each other.

[0028] If the legs 130 are tilted too much, the lower ends of the leg members 131a to 131d will protrude in the front-to-rear direction, and so when the workbench 100 is moved closer to a wall or another workbench 100, the leg members 131a to 131d will interfere, making it impossible to move the workbench 100 closer to the wall or another workbench 100. Therefore, in this embodiment, when viewed from above the workbench 100, the leg members 131a to 131d are arranged so that they do not extend beyond a straight line E that extends vertically from the outer periphery of the top panel 110. In other words, when viewed from above the workbench 100, the leg members 131a to 131d are arranged so that the upper to lower ends of the leg members 131a to 131d overlap the top panel 110.

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

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

[0032] The pair of side walls 203 are generally fan-shaped or arc-shaped when viewed from the front-to-rear direction, and have concave positioning portions 206a, 206b on the upper and side portions of their outer circumferential surfaces. The pair of side walls 203 also support a pivot pin 207 whose axis runs along the front-to-rear direction. The first connecting portion 204 is plate-shaped and extends vertically. The first connecting portion 204 is connected to the left side of the stopper member 134 using rivets, screws, or the like, thereby attaching the holding member 202 to the telescopic leg 133. The second connecting portion 205 is plate-shaped and inclined relative to the horizontal direction. The auxiliary leg member 201a abuts against the second connecting portion 205, thereby restricting the movement of the auxiliary leg member 201a. The holding member 202 is formed, for example, by bending a steel plate. The holding member 202 is a metallic color, for example, silver. The holding member 202 is also arranged such that a straight line E extending vertically from the outer periphery of the top plate portion 110 faces outward. In other words, the holding member 202 is arranged 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 or fluorescent 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 so as to be rotatable about the pivot pin 207. The main body 208 also has an insertion hole 209, through which the pivot pin 207 is inserted. The insertion hole 209 is a long, oblong hole that extends along the longitudinal direction of the main body 208, so the main body 208 has play equivalent to the length of the oblong hole. A positioning pin 210, which serves as a portion to be positioned, is inserted in the front-rear direction of the main body 208. Ends of the positioning pin 210 protrude beyond both side surfaces of the main body 208. Here, a spring 211 connects the pivot pin 207 and the positioning pin 210. Therefore, the auxiliary leg member 201a is always biased by the spring 211 in a direction approaching the holding member 202.

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

[0036] The seat portion 212 has a ground contact portion 213 and an attachment portion 215 . The ground contact portion 213 has a plurality of protrusions 214 on its underside, which comes into contact with the floor. The protrusions 214 are formed so that the force required to move the leg 130 to the right in the horizontal left-right direction when the leg 130 is in contact with the floor is smaller than the force required to move the leg 130 to the left. Specifically, the protrusions 214 are formed to protrude diagonally to the left as they approach the floor.

[0037] The mounting portion 215 is a portion where the seat portion 212 is mounted to the main body portion 208. The mounting portion 215 has a bottomed hole, and the tip of the main body portion 208 is inserted into the bottomed hole. 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 contacts the floor surface, and generate a biasing force that attempts to expand the seat portion 212 from the contracted state.

[0038] The auxiliary leg member 201a extends diagonally downward and to the left from the holding member 202 toward the floor surface. The tilt angle of the auxiliary leg member 201a (tilt angle β on the acute side between the floor surface and the auxiliary leg member 201a) is 25 to 45 degrees. If the tilt angle is less than 25 degrees, the amount of the auxiliary leg member 201a that protrudes from the top panel 110 increases, affecting the installation space. On the other hand, if the tilt angle is greater than 45 degrees, it may not be possible to prevent the unit from tipping over or it may interfere with the caster 181a. Furthermore, the auxiliary leg member 201a of this embodiment is arranged so as to extend outward from a straight line E that extends vertically from the outer periphery of the top plate portion 110. In other words, when viewed from above the workbench 100, the auxiliary leg member 201a is arranged so as to extend beyond the outer periphery of the top plate portion 110. The auxiliary leg member 201a is held in an inclined state when the positioning pin 210 engages with the positioning portion 206b of the holding member 202 and the main body portion 208 abuts against the second connecting portion 205. The auxiliary leg member 201a of this embodiment does not come into 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 mobile workbench 100 can be easily moved.

[0039] In this way, by arranging the auxiliary leg member 201a so that it protrudes from the outer periphery of the top panel portion 110, even if a force is applied to the outer periphery of the top panel portion 110 from above, the auxiliary leg member The seat portion 212 of 201a contacts the floor surface at a position that extends beyond the outer periphery of the top plate portion 110, thereby preventing the workbench 100 from tipping over. When the auxiliary leg member 201a contacts the floor surface, the biasing portion 216 contracts, generating a biasing force that tries to extend the auxiliary leg member 201a. 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 tip over, thereby further preventing the workbench 100 from tipping over.

[0040] Furthermore, 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 110 when viewed from above, and a second state in which it does not protrude from the outer periphery of the tabletop 110. Specifically, from a state in which the auxiliary leg member 201a extends toward the floor, the worker pulls the auxiliary leg member 201a 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 substantially vertically (see the two-dot chain line in FIG. 7 ). At this time, the positioning pin 210, biased by the spring 211, engages with the positioning portion 206a of the holding member 202, thereby holding the auxiliary leg member 201a in a state in which it is aligned substantially vertically. 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.

[0041] In this way, by preventing the auxiliary leg member 201a from protruding from the outer periphery of the tabletop 110, the workbench 100 can be moved even in a small space without the auxiliary leg member 201a getting in the way, 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 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 telescopic leg 133 of the leg member 131a, it is not affected even when the telescopic leg 133 is extended or retracted to adjust the height of the top plate portion 110, and the workbench 100 can be prevented from tipping over.

[0042] While the auxiliary leg member 201a has been described above, 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 that is bilaterally symmetrical to the auxiliary leg member 201a. The auxiliary leg members 201b to 201d are connected to the stopper members 134 of the extendable 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 arranged to extend beyond the longitudinal ends of the tabletop 110 when viewed from above. Therefore, even if a force is applied from above to any position on the longitudinal end of the outer periphery of the tabletop 110, the auxiliary leg members 201b to 201d closest to the position where the force is applied will come into contact with the floor, thereby preventing the workbench 100 from tipping over.

[0043] Furthermore, the auxiliary leg members 201a to 201d can each independently transition between the first state and the second state. Therefore, the worker 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.

[0044] Next, an example of using the auxiliary leg members 201a to 201d when two workbenches 100 configured as described above are connected will be described with reference to Figures 8 and 9. Here, the workbenches 100a and 100b are installed with their longitudinal ends parallel to each other. Figure 8 is a plan view of the two linked work tables 100a and 100b, and Figure 9 is a side view of the two linked work tables 100a and 100b.

[0045] To connect workbenches 100a and 100b, the worker lifts up and rotates the connecting member 114 of workbench 100a that is closest to workbench 100b, and inserts it into the connecting hole 118 of workbench 100b. Similarly, the worker lifts up and rotates the connecting member 114 of workbench 100b that is closest to workbench 100a, and inserts it into the connecting hole 118 of workbench 100a. Therefore, as shown in FIG. 8 , the connecting members 114 of workbenches 100a and 100b are connected to different workbenches 100b and 100a. By connecting workbenches 100a and 100b in this way, the movement of one workbench also moves the other, making it easy to move the entire workbench system. Note that the connecting member 114 is curved in a generally V-shape or V-shape when viewed from above, which prevents the connecting members 114 from interfering with each other when connected.

[0046] 8 and 9, the worker positions the auxiliary leg members 201a to 201d of the workbenches 100a and 100b that are not facing each other so that they extend beyond the outer periphery of the tabletop 110. On the other hand, as shown in Fig. 9, the worker positions the auxiliary leg members 201a to 201d that are facing each other so that they do not extend beyond the outer periphery of the tabletop 110 so that they do not interfere with each other. In this way, by selecting whether the auxiliary leg members 201a to 201d are in the first state or the second state, it is possible to accommodate various installations of the workbenches 100a and 100b.

[0047] 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 110 when viewed from above, but this is not limited to this. The auxiliary grounding section 200 may also have a separate auxiliary leg member that is arranged to protrude from the short-side end of the top plate 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. For example, at least two auxiliary leg members may be arranged to protrude from opposing sides of the outer periphery of the top plate 110 when viewed from above.

[0048] (Second embodiment) Next, a second embodiment will be described. The workbench 101 of this embodiment has an auxiliary grounding portion 220 that can adjust 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. 10 is a side view showing an example of the configuration of the workbench 101. As shown in FIG. Auxiliary ground contact part 220 has four auxiliary casters 221a to 221d. Auxiliary casters 221a to 221d are attached to telescopic legs 133 of leg members 131a to 131d, respectively. Note that auxiliary casters 221c and 221d are hidden by auxiliary casters 221a and 221b and are not shown in Figure 10. Because auxiliary casters 221a to 221d each have the same configuration, only auxiliary caster 221a will be described here.

[0049] The auxiliary caster 221a is attached to the telescopic leg 133 of the leg member 131a via a telescopic member 222. The telescopic member 222 is a member that telescopes along an extension of the cross member 137b. The telescopic member 222 fits inside the cross member 137b and can slide in stages along the longitudinal direction of the cross member 137b. The telescopic member 222 is made of, for example, an aluminum alloy and is formed by extrusion molding. In addition, 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 that stands out even in dark surroundings.

[0050] The auxiliary caster 221a is rotatably connected to an end of the expandable member 222. The auxiliary caster 221a may have the same configuration as the caster 181a, or may be a simpler caster without a stopper than the caster 181a. The auxiliary caster 221a in this embodiment is arranged so as to extend outward from a straight line E that extends vertically from the outer periphery of the top panel portion 110. In other words, when viewed from above the workbench 100, the auxiliary caster 221a is arranged so as to extend beyond the outer periphery of the top panel portion 110. In this way, by positioning the auxiliary caster 221a so that it extends beyond the outer peripheral edge of the top plate portion 110, even if force is applied to the outer peripheral edge of the top plate portion 110 from above, the auxiliary caster 221a is in contact with the floor surface at a position that extends beyond the outer peripheral edge of the top plate portion 110, thereby preventing the workbench 101 from tipping over.

[0051] Furthermore, the auxiliary caster 221a of this embodiment can adjust the amount of protrusion from the outer periphery of the tabletop 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 in accordance with the installation space of the workbench 101. The auxiliary caster 221a may be able to transition 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.

[0052] Furthermore, the auxiliary ground contact portion 220 is not limited to the auxiliary caster 221a, but may be an auxiliary leg member extending toward the floor surface from the end of the expandable member 222. In this case, it is preferable that the auxiliary leg member is not in contact with the floor surface but is kept separated from the floor surface in order to allow the workbench 101 to be easily moved.

[0053] (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 panel 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. 11 is a side view showing an example of the configuration of the workbench 102. 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 of the main legs 132 of the leg members 131a to 131d than to the lower ends thereof. In FIG. 11, the auxiliary leg members 231c and 231d are hidden by the auxiliary leg members 231a and 231b and are not shown. Since the auxiliary leg members 231a to 231d each have the same configuration, only the auxiliary leg member 231a will be described here.

[0054] 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 arranged so as not to extend beyond a straight line E that extends vertically from the outer periphery of the top panel portion 110. 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 that stands out even in dark surroundings.

[0055] Auxiliary leg member 231a is pivotally supported by holding member 232 so as to be rotatable in the left-right direction. The worker can position auxiliary leg member 231a so that it protrudes from the outer periphery of tabletop 110 by rotating it via holding member 232 so that it is inclined toward the floor. The worker can also position auxiliary leg member 231a so that it does not protrude from the outer periphery of tabletop 110 by rotating it via holding member 232 so that it is in a substantially vertical direction (see the two-dot chain line in FIG. 11).

[0056] The auxiliary leg member 231a also has an auxiliary telescopic leg 233. When the auxiliary leg member 231a is positioned so that it extends beyond the outer periphery of the tabletop 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. The worker can also extend the leg member 131a using the telescopic leg 133 to raise the tabletop 110. When the auxiliary telescopic legs 233 are adjusted as described above, the lower ends of the auxiliary telescopic legs 233 can be brought into contact with or close to the floor surface by extending the auxiliary telescopic legs 233.

[0057] The present invention has been described above using the above-mentioned embodiments, but the present invention is not limited to only the above-mentioned embodiments, and modifications and the like are possible within the scope of the present invention, and the respective embodiments may be combined as appropriate.

[0058] In the above-described embodiment, the auxiliary leg members 201a to 201d are maintained in their positions by the positioning pin 210 engaging with the positioning portions 206a and 206b, but this is not limited to this, and the auxiliary leg members 201a to 201d may be maintained using other mechanisms. In the above embodiment, the casters 181a to 181d have two wheels 183, but the present invention is not limited to this and may have only one wheel 183. In the above embodiment, the leg members 131a to 131d have the extendable legs 133, but this is not limitative and the extendable legs 133 may not be included.

[0059] In the above-described embodiment, the leg portion 130 is inclined relative to the vertical direction, but the present invention is not limited to this case, and the leg portion 130 does not have to be inclined relative to the vertical direction. In the above-described embodiment, the connecting member 114 is described as being roughly V-shaped or roughly V-shaped when viewed from above, but this is not limited to this case and any shape is acceptable as long as it is curved in a way that prevents interference between the connecting members 114 of adjacent workbenches 100. In this embodiment, the auxiliary grounding portions 200, 220, 230 are arranged so as to extend beyond the outer periphery of the top plate portion 110, but this is not limited to this case and can be modified as appropriate depending on the problem or the like. [Explanation of symbols]

[0060] 100: Mobile workbench 110: Top plate portion 114: Connecting member 118: Connecting hole 130: Leg portion 131a to 131d: Leg member 134: Telescopic leg 180: Running portion 181a to 181d: Caster 200: Auxiliary ground contact portion 201a to 201d: Auxiliary leg member 216: Pressurizing portion 220: Auxiliary ground contact portion 221a to 221d: Auxiliary caster 230: Auxiliary leg member 231a to 231d: Auxiliary leg member

Claims

1. The top plate and Legs arranged to overlap the top plate when viewed from above; A mobile workbench including an auxiliary grounding member that is disposed protruding from the outer peripheral edge of the top plate portion when viewed from above, The auxiliary grounding member is The seat has a main body extending linearly and a seat located at the tip of the main body, and is held by a holding member connected to the leg, an inclined state in which the main body portion extends obliquely downward from the holding member toward the floor surface and the seat portion is positioned at the lower side; the main body portion extends from the holding member in a substantially vertical direction, and the seat portion is rotatable to a vertical state in which it is positioned above the inclined state, The seat portion is A mobile workbench characterized in that, in the inclined state, the mobile workbench is positioned away from the floor surface and comes into contact with the floor surface when the mobile workbench is about to tilt.

2. The top plate and Legs arranged to overlap the top plate when viewed from above; A mobile workbench including an auxiliary grounding member that is disposed protruding from the outer peripheral edge of the top plate portion when viewed from above, The auxiliary grounding member is The seat has a main body extending linearly and a seat located at the tip of the main body, and is held by a holding member connected to the leg, an inclined state in which the main body portion extends obliquely downward from the holding member toward the floor surface and the seat portion is positioned at the lower side; the main body portion extends from the holding member in a substantially vertical direction, and the seat portion is rotatable to a vertical state in which it is positioned above the inclined state, In the tilted state, the top plate portion protrudes from the outer periphery of the top plate portion when viewed from above. A mobile workbench characterized in that, when in the vertical state, it does not extend beyond the outer periphery of the top plate portion when viewed from above.

3. The leg portion has four leg members, A cross member is bridged between adjacent leg members, In the tilted state, the seat portion is located below the lowest cross member, 3. The mobile workbench according to claim 1, wherein in the vertical position, the seat portion is positioned above the lowest cross member.

4. the leg member includes a main leg and an extendable leg that is slidable along a longitudinal direction of the main leg to change the height of the top panel portion, 4. The mobile workbench according to claim 3, wherein the lowermost cross member is bridged between adjacent telescopic legs.

5. 5. The mobile workbench according to claim 4, wherein the holding member is attached to the telescopic leg.

6. the auxiliary grounding member rotates around a pivot pin supported by a pair of side walls of the holding member, the holding member has a connecting portion that connects the pair of side walls to each other, 6. The mobile workbench according to claim 5, wherein the holding member is attached to the telescopic leg by connecting the connecting portion to a side surface of the telescopic leg.

7. 7. The mobile workbench according to claim 3, wherein the main body is colored differently from the leg members.

8. 8. The mobile workbench according to claim 3, wherein the seat portion is colored differently from the leg members.

9. 9. The mobile workbench according to claim 1, wherein the main body has an inclination angle of 25 degrees to 45 degrees on the acute side with respect to the floor surface when in the inclined state.

10. The seat portion is 10. A mobile workbench according to claim 1, further comprising a biasing portion that biases the mobile workbench in a direction returning it to the direction in which it tends to tilt when it touches the floor surface.

11. The seat has a plurality of protrusions on its underside that comes into contact with the floor, The plurality of protrusions are A mobile workbench as described in any one of claims 1 to 10, characterized in that it is formed so as to act in a direction that causes the mobile workbench to return to its original position relative to the direction in which the mobile workbench tends to tilt when it comes into contact with the floor surface.

12. four of the auxiliary grounding members; A mobile workbench described in any one of claims 1 to 11, characterized in that two of the four auxiliary grounding members are positioned to extend beyond a first long side of the outer periphery of the top plate portion when viewed from above, and the remaining two auxiliary grounding members are positioned to extend beyond a second long side of the outer periphery of the top plate portion when viewed from above.

13. The leg portion has a pair of legs facing each other, 13. The mobile workbench according to claim 1, wherein the pair of legs are inclined so as to move away from each other from the upper end to the lower end.

14. 14. The mobile workbench according to claim 13, wherein the leg has an inclination angle on the acute side relative to the floor surface that is smaller than 90 degrees and larger than 80 degrees.

15. Further, the vehicle has a running portion connected to the leg portion, The leg portion has four leg members, the running unit has casters that are connected to the four leg members, respectively, and are rotatable about vertical axes; A mobile workbench described in any one of claims 1 to 14, characterized in that the casters are arranged so as to overlap the top plate portion in any rotated position when viewed from above the mobile workbench.

16. The caster has a wheel and a pedal portion that is operated to prevent the wheel from rotating, The mobile workbench described in claim 15, characterized in that the pedal portion is arranged so as to overlap the top plate portion regardless of the position of the casters when viewed from above the mobile workbench.

17. The top plate portion has a connecting member for connecting to another mobile work platform and a connecting hole to which the connecting member of the other mobile work platform is connected, A mobile workbench described in any one of claims 1 to 16, characterized in that the connecting member is bar-shaped and, when viewed from above the mobile workbench, is curved so as not to interfere with the connecting members of the other mobile workbenches.

Images