Portable work table

Abstract

To provide a portable work table capable of improving stability.SOLUTION: A portable work table 100 comprises: a top plate portion 110; a first leg body 131A and a second leg body 131B rotatably connected to the top plate portion 110; a first rotation regulation body 181A and a second rotation regulation body 181B regulating the rotation of each of the first leg body 131A and the second leg body 131B. Each of the first leg body 131A and the second leg body 131B includes the same number of stages of laterally bridging members 138a to 138d. The first rotation regulation body 181A and the second rotation regulation body 181B are connected to laterally bridging members 138a to 138d at different stage.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] 2. Description of the Related Art Portable work platforms for working at heights have been known for some time. Patent Document 1 discloses a portable work platform that includes a top plate and a pair of legs. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-84944 A Summary of the Invention [Problem to be solved by the invention]

[0004] Portable work platforms are required to be more stable so that workers can work at height safely. The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide a portable workbench that can improve stability. [Means for solving the problem]

[0005] The portable workbench of the present invention is a portable workbench comprising a top plate portion, a first leg body and a second leg body rotatably connected to the top plate portion, and a first rotation control body and a second rotation control body which control the rotation of the first leg body and the second leg body, respectively, characterized in that the first leg body and the second leg body each have a cross member of the same number of stages, and the first rotation control body and the second rotation control body are connected to cross members of different stages. Effect of the Invention

[0006] According to the present invention, it is possible to improve stability. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a front view showing an example of a configuration of a workbench according to a first embodiment. [Diagram 2] FIG. 2 is a side view showing an example of a configuration of a workbench. [Diagram 3] FIG. 2 is a side view showing an example of a configuration of a workbench. [Figure 4] FIG. 2 is a plan view showing an example of a configuration of a workbench. [Diagram 5] FIG. 4 is a diagram showing an example of the configuration of a cross member. [Figure 6] 13 is a front view showing an example of a state in which the surrounding portion is deformed. FIG. [Figure 7] 13 is a front view showing an example of a state in which the surrounding portion is deformed. FIG. [Figure 8A] 13A and 13B are diagrams illustrating an example of a configuration of a rotating part in a spread-leg state. [Figure 8B] 13A and 13B are diagrams illustrating an example of a configuration of a rotation part in a closed leg state. [Figure 9A] 13A and 13B are diagrams illustrating an example of a configuration of a rotating part in a spread-leg state. [Figure 9B] 13A and 13B are diagrams illustrating an example of a configuration of a rotation part in a closed leg state. [Figure 10] FIG. 4 is a perspective view showing an example of a configuration of a stay portion. [Figure 11] 13 is a bottom view showing an example of the configuration around the top plate portion. FIG. [Figure 12] 4 is a cross-sectional view showing an example of a configuration around the top plate portion. FIG. [Figure 13] FIG. 13 is a front view showing an example of a state in which the legs are folded. [Figure 14] FIG. 13 is a bottom view showing an example of a state in which the legs are folded. [Figure 15] FIG. 11 is a side view showing an example of the configuration of a workbench according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, the portable workbench according to this embodiment will be described with reference to the drawings. (First embodiment) The portable work platform 100 is a work platform for a worker to work at height. The portable work platform 100 of this embodiment (hereinafter referred to as the work platform 100) is assumed to have a height of, for example, about 1000 mm to about 1900 mm from the floor surface to a top plate portion 110 described later. Fig. 1 is a front view showing an example of the configuration of the workbench 100. Fig. 2 is a right side view showing an example of the configuration of the workbench 100. Fig. 3 is a left side view showing an example of the configuration of the workbench 100. Fig. 4 is a plan 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 , an enclosure portion 140 , a rotating portion 150 , and a rotation restricting portion 180 .

[0009] The top plate 110 functions as a foothold for workers working at height. The top plate 110 is rectangular and long in the front-rear direction when viewed from above. The length in the front-rear direction is, for example, approximately 1500 mm, and the length in the left-right direction is, for example, approximately 500 mm. The top plate portion 110 is formed by connecting a plurality of long top plate members. Specifically, the top plate portion 110 is formed by connecting a plurality of (for example, three) long longitudinal members 111a to 111c that are long in the front-rear direction, lining them up from the left to right, and fixing them from the front and rear with short members 112a and 112b by using bolts or rivets (see FIG. 4). The rivets include blind rivets. The longitudinal members 111a to 111c and the short members 112a and 112b are made of, for example, an aluminum alloy, and are formed by extrusion molding. The longitudinal members 111a to 111c are, for example, a metallic color such as silver. On the other hand, the short members 112a and 112b are, for example, a metallic color such as gold, and are given a color different from that of the longitudinal members 111a to 111c. Therefore, the worker can easily visually recognize the short members 112a, 112b and can easily recognize the positions of the ends of the top plate portion 110. The extruded aluminum alloy is colored, for example, in the process of anodizing. The top plate 110 has a plurality of projections 113 on its upper surface, which serves as a work surface, to prevent slipping. The projections 113 are formed at intervals across the entire surface of the top plate 110. The projections 113 protrude upward and have a hole formed in the center.

[0010] Next, the legs 130 will be described. 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 front-rear end portions 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 as to overlap the top panel 110. Specifically, the leg section 130 has a pair of legs 131A and 131B. The leg 131A is located at the rear in the front-rear direction and extends from the top panel section 110 toward the floor surface. The leg 131B is located at the front of the top panel section 110 in the front-rear direction and extends from the top panel section 110 toward the floor surface. As shown in FIG. 1, the leg 131A and the leg 131B face each other at positions separated in the front-rear direction and are inclined so as to move away from each other toward the lower end. The leg 131A and the leg 131B are so-called ladder-shaped, and allow an operator to ascend and descend between the top panel section 110 and the floor surface.

[0011] First, the leg 131A will be described. Leg body 131A has leg members 132a and 132b and multiple cross members 138a to 138d (see FIG. 2). Leg members 132a and 132b are located at both ends in the left-right direction of tabletop portion 110. Leg members 132a and 132b face each other with a gap in between in the left-right direction, and incline so as to move away from each other toward the bottom end. Each of the leg members 132a, 132b has a main leg 133 and an extendable leg 134. The main leg 133 is a main component of the leg members 132a and 132d. The main leg 133 is made of, for example, an aluminum alloy and is formed by extrusion molding. The main leg 133 has a metallic color such as silver. The main leg 133 is, for example, a hollow or solid member having a substantially rectangular cross section. The main leg 133 has a rotating member 155a (described later) located near the upper end.

[0012] The telescopic leg 134 is a member that telescopically extends and retracts the leg members 132a and 132b along the longitudinal direction. The telescopic leg 134 fits inside the main leg 133 and can slide along the longitudinal direction of the main leg 133. The telescopic leg 134 is made of, for example, an aluminum alloy and is formed by extrusion molding. The telescopic leg 134 is a metallic color such as silver. The telescopic leg 134 is, for example, a hollow or solid member with a substantially rectangular cross section that is a reduced cross section of the main leg 133. The telescopic leg 134 extends and retracts the length of the leg members 132a and 132b by changing the length that protrudes from the lower end of the main leg 133. In FIG. 1, the shortened state of the leg member 132a is shown by a two-dot chain line. The telescopic leg 134 also has a leg seat 135 at the lower end. The leg seat 135 is a member that stably grounds the lower ends of the leg members 132a and 132b on the floor surface. The leg seat 135 is made of, for example, soft synthetic resin. The leg seat 135 is colored, for example, orange, blue, green, etc. The leg seat 135 is fitted onto the outer periphery of the lower end of the extendable leg 134 and fixed thereto using bolts, rivets, etc. The height of the tabletop 110 can be adjusted by extending and retracting the leg members 132a, 132b using the extendable legs 134. The height of the legs 130 can be adjusted stepwise, for example, at intervals of approximately 60 mm, between 0 mm and 400 mm. Furthermore, main leg 133 has a locking mechanism 136. Locking mechanism 136 locks in stages the length that telescopic leg 134 projects from the lower ends of leg members 132a, 132b. Locking mechanism 136 is attached to the opposing side surfaces of leg members 132a and 132b.

[0013] The cross members 138a to 138d are so-called step bars on which an operator places his / her feet when ascending or descending. The cross members 138a to 138d are horizontally laid across the main leg 133 of the leg member 132a and the main leg 133 of the leg member 132b. The cross members 138a to 138d can also improve the rigidity of the leg body 131A. Specifically, four horizontal members are arranged between the main leg 133 of leg member 132a and the main leg 133 of leg member 132b: a first horizontal member 138a, a second horizontal member 138b, a third horizontal member 138c, and a fourth horizontal member 138d. The horizontal members 138a to 138d are shorter in the left-right direction at the top and longer in the left-right direction at the bottom. The horizontal members 138a to 138d are fixed to the main leg 133 via brackets using bolts, rivets, etc. The cross members 138a to 138d are made of, for example, an aluminum alloy and are formed by extrusion molding. The cross members 138a to 138d are, for example, hollow or solid members. Here, the cross members 138a to 138db are given a color different from that of the leg members 132a and 132b. The cross members 138a to 138d are, for example, a metallic color such as gold. Therefore, the worker can easily visually recognize the cross members 138a to 138d, and can prevent the worker from stepping off the cross members 138a to 138d when ascending or descending. In this embodiment, the cross members 138a to 138d and the short members 112a and 112b are given the same color.

[0014] 5 is a diagram showing an example of the configuration of the cross member 138a. Here, the cross member 138a will be described, but it has the same shape as the cross members 138b to 138d but differs in length. Fig. 5(a) is a plan view of the horizontal member 138a. Fig. 5(b) is a side view of the horizontal member 138a. Fig. 5(c) is a front view (cross-sectional view) of the horizontal member 138a, in which the main legs 133 are indicated by two-dot chain lines. Fig. 5(d) is an enlarged cross-sectional view of the recess 126 of the horizontal member 138a. The cross member 138a has an upper part 121, mounting parts 122 and 123, and a lower part 124. The upper surface of the upper part 121 is a surface on which the legs of the worker are placed. The front part of the upper part 121 protrudes forward from the main legs 133, and the rear part of the upper part protrudes rearward from the main legs 133. Therefore, the area of ​​the upper surface of the upper part 121 can be increased, and the worker can easily place his / her feet on it. The upper part 121 also has a plurality of ridges 125 (or recesses) along the longitudinal direction of the cross member 138a. The ridges 125 can prevent the feet of the worker from slipping in the front-rear direction on the upper part 121. The ridges 125 can be formed during extrusion molding.

[0015] Furthermore, the upper portion 121 has a plurality of recesses 126 on the upper surface thereof along a direction intersecting the longitudinal direction of the cross member 138a, specifically along a direction substantially perpendicular thereto. The recesses 126 are formed from the front end to the rear end of the upper portion 121. Here, the dimension from the upper surface of the upper portion 121 to the deepest position of the recesses 126 is greater than the dimension from the upper surface of the upper portion 121 to the highest position of the protruding strip 125. As shown in FIG. 5(d), the recesses 126 become gradually narrower as they become deeper, and have flat bottoms. The recesses 126 can prevent the feet of the worker from slipping in the left-right direction on the upper portion 121. The recesses 126 are formed by pressing the upper portion 121 from above after extrusion molding. However, the recesses 126 may be formed by cutting the upper surface of the upper portion 121.

[0016] Here, the case where the upper part 121 has the recess 126 has been described, but this is not limited to the case, and at least one of the recess 126 and the protrusion may be provided. A plurality of protrusions are provided along a direction intersecting the longitudinal direction of the cross member 138a, specifically along a direction substantially perpendicular thereto. The protrusions may be substantially circular in plan view and disposed over the entire surface of the upper part 121 of the cross member 138a. If the protrusions are provided, they are preferably made of a different material from the cross member 138a. Here, the leg 131A has been described, but the leg 131B has the same configuration. The leg 131B has leg members 132c and 132d and a plurality of cross members 138a to 138d (see FIG. 3). That is, the leg 131B has a structure in which the leg member 132a is replaced with the leg member 132d and the leg member 132b is replaced with the leg member 132c, and has the same number of cross members 138a to 138d as the leg 131A. When viewed from the front-rear direction, the cross members 138a to 138d of the leg 131A and the cross members 138a to 138d of the leg 131B overlap each other and are located at approximately the same height.

[0017] Next, the surrounding portion 140 will be described. The enclosure 140 has a function of surrounding the working area of ​​the top plate 110. The enclosure 140 has pillars 141a to 141d, a pair of long side rail members 142, and a pair of short side rail members 143. The pillars 141a to 141d are arranged in a substantially vertical direction at the corners of the top plate 110. The pillars 141a to 141d are rotatably connected to the upper ends of the leg members 132a to 132d, respectively. The pair of long side rail members 142 are bridged between the pillars 141a and 141c and between the pillars 141b and 141d on the upper side of the end of the long side of the outer periphery of the top plate 110. The long side rail members 142 are divided at substantially the center in the longitudinal direction and are rotatably connected to the upper ends of the pillars 141a to 141d, respectively. The pair of short side rail members 143 are disposed above the short side ends of the outer periphery of the top plate portion 110 and bridge between the pair of long side rail members 142 .

[0018] Enclosure 140 can move short-side rail member 143 from a state in which it is bridged across one long-side rail member 142 to a first state in which it is aligned with the other long-side rail member 142. In the first state, an operator can move between table top 110 and leg 131A, or between table top 110 and leg 131B. As shown in FIG. 6, the enclosure 140 can be moved from a first state to a second state along the supports 141a to 141d by rotating each of the divided long side rail members 142. 7, the enclosure 140 can transition from the second state to a third state along the leg members 132a-132d by rotating the pillars 141a-141d. In the third state, the long side rail members 142 overlap the main leg 133 in the left-right direction. In this way, by transitioning to the third state, when the leg bodies 131A and 131B are rotated to fold them relative to the top panel 110, the pillars 141a-141d and other members constituting the enclosure 140 also rotate together with the leg bodies 131A and 131B.

[0019] Next, the rotating portion 150 will be described. The pivoting unit 150 has a function of pivoting the leg unit 130 relative to the top plate unit 110. By pivoting the leg unit 130 via the pivoting unit 150, the leg unit 130 changes between an open-leg posture in which the leg unit 130 supports the top plate unit 110 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 rotating bodies 151a to 151d. The rotating bodies 151a to 151d are disposed between the leg members 132a to 132d and the top panel section 110, respectively. That is, the rotating bodies 151a to 151d are positioned adjacent to the corners of the top panel section 110, respectively. First, the rotating body 151a will be described. The rotating body 151a and the rotating body 151b are configured substantially symmetrically with respect to each other.

[0020] Fig. 8A(a) is a cross-sectional view showing the configuration around the rotating body 151a when viewed from the front in the leg-spread state. Fig. 8A(b) is a diagram showing the configuration around the rotating body 151a when viewed from the left and right in the leg-spread state. Note that Fig. 8A does not show the surrounding part 140. The rotating body 151a includes a rotation support member 152a, a rotating member 155a, a rotating shaft 159, and a stopper mechanism 160a. The rotation support member 152a is a member that supports the rotation of the leg member 132a. The rotation support member 152a is made of, for example, iron or titanium, and is generally plate-shaped. The rotation support member 152a is a metallic color, for example, silver. The rotation support member 152a is fixed to the side of the top plate portion 110 using bolts, rivets, or the like. The rotation support member 152a has a support hole 153a in the lower part into which the rotation shaft 159 is inserted. In addition, the rotation support member 152a has a stopper hole 154 in the upper part into which a stopper member 165, which will be described later, is inserted. Note that the rotation support member 152a may be appropriately formed with ribs that are uneven in the plate thickness direction in order to improve rigidity.

[0021] The rotating member 155a is a member that engages with the stopper member 165 described later. The rotating member 155a is made of, for example, iron or titanium, and is substantially plate-shaped. The rotating member 155a is of a metallic color, for example, silver. The rotating member 155a is located close to the upper end of the main leg 133, and is fixed to the outer side surface of the leg member 132a using bolts, rivets, or the like. The rotating member 155a also has a communication hole 156a that communicates with the support hole 153a, a first engagement hole 157a, and a second engagement hole 158a. The first engagement hole 157a is located at the top of the rotating member 155a, and the second engagement hole 158a is located at the front of the rotating member 155a. The distance from the communication hole 156a to the first engagement hole 157a and the distance from the communication hole 156a to the second engagement hole 158a are the same. When the rotating member 155a is fixed to the side surface of the leg member 132a, the first engagement hole 157a and the second engagement hole 158a are positioned so as not to overlap the leg member 132a when viewed from the left-right direction. The first engagement hole 157a and the second engagement hole 158a are not limited to through holes, and may be bottomed holes. In addition, the rotating member 155a may be appropriately formed with ribs that are uneven in the plate thickness direction in order to improve rigidity. The rotating shaft 159 is a member that becomes the center of rotation when the leg member 132a rotates. The rotating shaft 159 is inserted through the support hole 153a of the rotation support member 152a and the communication hole 156a of the rotating member 155a. The rotating shaft 159 is, for example, a bolt, and is attached by screwing a nut so that it cannot come off. In this way, the rotating body 151a rotates the leg member 132a via the rotating member 155a around the rotating shaft 159 supported by the rotation support member 152a.

[0022] The stopper mechanism 160a is a mechanism for holding the leg members 132a in either the open leg state or the closed leg state. The stopper mechanism 160a is provided inside the top panel portion 110. The stopper mechanism 160 a includes a stopper member 165 , a biasing member 168 , and a lever portion 167 . The stopper member 165 is a member that engages with the first engagement hole 157a or the second engagement hole 158a of the rotating member 155a. The stopper member 165 is made of, for example, iron and is substantially bar-shaped. The stopper member 165 is a metallic color such as silver. The stopper member 165 is disposed along the left-right direction of the top plate portion 110. At this time, the stopper member 165 penetrates the rib 115 of the elongated member 111a and is slidable along the left-right direction through the rib 115. Specifically, the stopper member 165 has an engagement portion 166 and a lever portion 167. The engagement portion 166 is located at the tip of the stopper member 165 and is engaged with the rotating member 155a by being inserted into either the first engagement hole 157a or the second engagement hole 158a. The lever portion 167 is located on the opposite side of the engaging portion 166 and close to the approximate center of the top plate portion 110 in the left-right direction. The lever portion 167 extends in a direction approximately perpendicular to the left-right direction. The engaging portion 166 is constantly urged toward the rotating member 155a by a biasing member 168 disposed between the engaging portion 166 and the lever portion 167. The biasing member 168 is, for example, a coil spring, and is disposed between the intermediate position of the stopper member 165 and the rib 115 of the longitudinal member 111a. The lever portion 167 is a portion where an operator slides the stopper member 165 in the left-right direction against the biasing force of the biasing member 168 to release the engagement by the engaging portion 166. Here, the outer periphery of the lever portion 167 is covered by an operating lever 170. Therefore, in reality, the operator operates the operating lever 170 to release the engagement by the engaging portion 166.

[0023] The operating lever 170 is made of, for example, a synthetic resin. The operating lever 170 is also given a color different from that of the stopper member 165. The operating lever 170 is also given a color different from that of the top plate member of the top plate portion 110. Specifically, the operating lever 170 is, for example, blue. The operating lever 170 is colored, for example, by mixing a coloring agent into a resin material and subjecting it to injection molding. The operating lever 170 also has a plurality of anti-slip ribs 171 that protrude in an annular shape in the radial direction from the outer circumferential surface. In this way, by covering lever portion 167 with operating lever 170, the diameter of the portion to be gripped becomes larger, so that the operator can easily perform the operation to release the engagement. Also, by applying color to operating lever 170, the operator can easily recognize operating lever 170.

[0024] Here, with reference to Figs. 8A and 8B, a description will be given of the operation of leg member 132a when it rotates from the open leg state to the closed leg state. Fig. 8B(a) is a cross-sectional view showing the configuration around the rotating body 151a when viewed from the front in the closed-leg state. Fig. 8B(b) is a diagram showing the configuration around the rotating body 151a when viewed from the left and right in the closed-leg state. Note that Fig. 8B does not show the surrounding portion 140. First, the operator operates the operating lever 170 from the state shown in FIG. 8A against the biasing force of the biasing member 168 to slide the stopper member 165 in the left-right direction. When the stopper member 165 slides, the engagement portion 166 of the stopper member 165 disengages from the first engagement hole 157a of the rotating member 155a, and the engagement between the stopper member 165 and the rotating member 155a is released. In this state, the leg member 132a can be rotated relative to the top plate portion 110. The operator rotates the leg member 132a around the rotation shaft 159 of the rotating body 151a in a direction in which the leg member 132a overlaps with the top plate portion 110. While the leg member 132a is being rotated, the rotating member 155a also rotates in accordance with the rotation of the leg member 132a. While the leg member 132a is rotating, the operator releases the operating lever 170, whereby the engaging portion 166 of the stopper member 165 comes into contact with the surface of the rotating member 155a due to the biasing force of the biasing member 168. Therefore, the rotating member 155a rotates while being in contact with the engaging portion 166 of the stopper member 165.

[0025] As shown in FIG. 8B, when the leg member 132a rotates until it is approximately parallel to the top plate portion 110, the second engagement hole 158a of the rotating member 155a communicates with the stopper hole 154. Therefore, the engagement portion 166 of the stopper member 165 is inserted into the second engagement hole 158a by the biasing force of the biasing member 168, and the stopper member 165 engages with the rotating member 155a. In this manner, the leg member 132a is held in the closed-leg state. Note that, in order to shift the leg member 132a from the closed-leg state to the open-leg state, the engagement between the stopper member 165 and the rotating member 155a is released. Here, the leg member 132a has been described, but since the leg members 132a and 132b are integrally configured via the cross members 138a to 138d, the leg member 132b also rotates in the same manner. Note that the operation lever 170 for releasing the engagement between the rotation member 155a fixed to the leg member 132a and the stopper member 165, and the operation lever 170 for releasing the engagement between the rotation member 155a fixed to the leg member 132b and the stopper member 165 are located adjacent to each other in the center in the left-right direction of the tabletop 110. Therefore, the operator can release the engagement on either the leg member 132a side or the leg member 132b side by gripping the two operation levers 170 with one hand.

[0026] Next, the rotating body 151c will be described. Since the rotating body 151c and the rotating body 151d have a substantially symmetrical configuration, the following description will focus on the rotating body 151c. The rotating body 151c will be described mainly in terms of the differences from the rotating body 151a, and similar configurations will be denoted by the same reference numerals and descriptions thereof will be omitted as appropriate. Fig. 9A(a) is a diagram showing the configuration around the rotating body 151c when viewed from the left and right in the leg-spread state. Fig. 9A(b) is a cross-sectional view showing the configuration around the rotating body 151c when viewed from the rear in the leg-spread state. Note that Fig. 9A does not show the surrounding portion 140. The rotating body 151c includes a rotation support member 152c, a rotating member 155c, a rotating shaft 159, and a stopper mechanism 160c. The pivot support member 152c is a member that supports the pivot of the leg member 132c. The pivot support member 152c is made of, for example, iron or titanium, and is generally plate-shaped. The pivot support member 152c is a metallic color, for example, silver. The pivot support member 152c has a support hole 153c in the lower part into which the pivot shaft 159 is inserted. The support hole 153c is located lower than the support hole 153a of the pivot support member 152a described above. However, the stopper hole 154 is located at the same height as the stopper hole 154 of the pivot support member 152a described above. Note that the pivot support member 152c may be formed with ribs that are uneven in the plate thickness direction as appropriate to improve rigidity.

[0027] The rotating member 155c is a member that engages with the stopper member 165. The rotating member 155c is made of, for example, iron or titanium, and is generally plate-shaped. The rotating member 155c is of a metallic color, for example, silver. The rotating member 155c is located close to the upper end of the main leg 133, and is fixed to the outer side surface of the leg member 132c using bolts, rivets, or the like. The rotating member 155c also has a communication hole 156c that communicates with the support hole 153c, a first engagement hole 157c, and a second engagement hole 158c. The first engagement hole 157c is located at the top of the rotating member 155c, and the second engagement hole 158c is located at the rear of the rotating member 155c. The distance from the communication hole 156c to the first engagement hole 157c and the second engagement hole 158c are the same. When the rotating member 155c is fixed to the side surface of the leg member 132c, the first and second engagement holes 157c and 158c are positioned so as not to overlap with the leg member 132c when viewed from the left-right direction. The first and second engagement holes 157c and 158c are not limited to through holes, and may be bottomed holes. The rotating member 155c may be formed with ribs that are uneven in the plate thickness direction as appropriate to improve rigidity. The rotating body 151c rotates the leg member 132c via the rotating member 155c around a rotation shaft 159 supported by the rotation support member 152c. However, since the support hole 153c is located lower than the above-mentioned support hole 153a, the rotating body 151c supports the rotation of the leg member 132c at a position lower than the above-mentioned rotating body 151a. The reason why the position at which the leg member 132c is rotated is set to the lower side in this manner is that the leg member 132c does not directly overlap the top plate portion 110, but overlaps with the leg member 132a in the closed leg position. That is, in the closed leg position, the top plate portion 110, the leg member 132a, and the leg member 132c overlap in this order, and the position at which the leg member 132c is rotated is offset downward by approximately the thickness of the leg member 132a in the front-rear direction in order to make the leg member 132c in the closed leg position horizontal.

[0028] The stopper mechanism 160 c includes a stopper member 165 , a biasing member 168 , and a lever portion 167 . 9A and 9B, the operation of the leg member 132c when it rotates from the open leg state to the closed leg state will be described. Note that the explanation of the same operation as the operation of the leg member 132a when it rotates from the open leg state to the closed leg state will be omitted as appropriate. Fig. 9B(a) is a diagram showing the configuration around the rotating body 151c when viewed from the left and right in the closed-leg state. Fig. 9B(b) is a cross-sectional view showing the configuration around the rotating body 151c when viewed from the rear in the closed-leg state. Note that Fig. 9B does not show the surrounding portion 140. First, from the state shown in Fig. 9A, the operator operates the operating lever 170 against the bias of the biasing member 168 to slide the stopper member 165 in the left-right direction. When the stopper member 165 slides, the engagement portion 166 of the stopper member 165 disengages from the first engagement hole 157c of the rotating member 155c, and the engagement between the stopper member 165 and the rotating member 155c is released. The operator rotates the leg member 132c around the rotation shaft 159 of the rotating body 151c in a direction in which the leg member 132c overlaps with the leg member 132a.

[0029] As shown in FIG. 9B, the leg member 132c rotates until it is approximately parallel to the leg member 132a and the top plate portion 110, whereby the second engagement hole 158c of the rotating member 155c communicates with the stopper hole 154. Therefore, the engagement portion 166 of the stopper member 165 is inserted into the second engagement hole 158c by the biasing force of the biasing member 168, and the stopper member 165 engages with the rotating member 155c. In this manner, the leg member 132c is held in a closed-leg state. Note that the leg member 132c can be shifted from the closed-leg state to the open-leg state by releasing the engagement between the stopper member 165 and the rotating member 155c. Here, the leg member 132c has been described, but since the leg members 132c and 132d are integrally configured via the cross members 138a to 138d, the leg member 132d also rotates in the same manner. Note that the operation lever 170 for releasing the engagement between the rotation member 155c fixed to the leg member 132c and the stopper member 165, and the operation lever 170 for releasing the engagement between the rotation member 155c fixed to the leg member 132d and the stopper member 165 are located next to each other in the center in the left-right direction of the tabletop 110. Therefore, the operator can release the engagement on either the leg member 132c side or the leg member 132d side by gripping the two operation levers 170 with one hand.

[0030] Next, the rotation restricting portion 180 will be described. The rotation restricting portion 180 has a function of restricting the rotation of the legs 130 relative to the top plate portion 110 . Specifically, the rotation restricting portion 180 has rotation restricting bodies 181A and 181B (see FIG. 1). The rotation restricting body 181A is located at the rear in the front-rear direction and is connected to the top plate portion 110 and the leg body 131A. Therefore, the rotation restricting body 181A restricts the rotation of the leg body 131A. Moreover, the rotation restricting body 181B is located at the front in the front-rear direction and is connected to the top plate portion 110 and the leg body 131B. Therefore, the rotation restricting body 181B restricts the rotation of the leg body 131B.

[0031] The rotation restricting body 181A has a stay portion 182a and a stay portion 182b (see FIG. 2). The stay portion 182a and the stay portion 182b are configured substantially symmetrically, so here, only the stay portion 182a will be described. As shown in FIGS. 1 and 2, the stay portion 182a is disposed between the top panel portion 110 and the second upper cross member 138b. FIG. 10 is a perspective view showing an example of the configuration of the stay portion 182a as viewed obliquely from above. FIG. 10(a) shows a state in which the angle α of the stay portion 182a is smaller than 180 degrees, and FIG. 10(b) shows a state in which the angle α of the stay portion 182a is larger than 180 degrees. The stay portion 182a has a first stay member 183, a second stay member 185a, and a cover member 188. The first stay member 183 is rotatably connected to the lower surface of the top plate portion 110 via a bracket 184. The second stay member 185a is rotatably connected to the mounting portion 122 of the second-stage horizontal member 138b from above via a bracket 186. The first stay member 183 is a linear member, for example, having a U-shaped cross section. The second stay member 185a is a linear member, for example, having a U-shaped cross section or a C-shaped cross section. The first stay member 183 and the second stay member 185a are made of, for example, an aluminum alloy, and are formed by extrusion molding. The first stay member 183 and the second stay member 185a are, for example, a metallic color such as silver. A rotation shaft 187 is inserted through the position where the first stay member 183 and the second stay member 185a overlap. The first stay member 183 and the second stay member 185a are rotatable via the rotation shaft 187.

[0032] The cover member 188 is a member that prevents a hand from being pinched between the first stay member 183 and the second stay member 185a. The cover member 188 is substantially plate-shaped. The cover member 188 is made of, for example, synthetic resin. The cover member 188 is given a color different from the first stay member 183 and the second stay member 185a. Specifically, the cover member 188 is red, orange, yellow, or the like. The cover member 188 is colored, for example, by mixing a colorant into a resin material and subjecting it to injection molding. The cover member 188 is attached to the end of the first stay member 183 on the rotating shaft 187 side in the longitudinal direction. Furthermore, the cover member 188 is attached so as to protrude outward from the end.

[0033] Here, in order to make the workbench 100 usable, as shown in FIG. 1, the angle α between the first stay member 183 and the second stay member 185a is set to a predetermined angle (for example, 185 degrees) that exceeds 180 degrees and is greater than 180 degrees. In this state, the first stay member 183 and the second stay member 185a abut against each other, so that the angle α does not rotate in a direction greater than the predetermined angle. Furthermore, when the angle α exceeds 180 degrees, resistance is generated in the stay portion 182a, and it is necessary to rotate against the resistance. Therefore, once the angle α exceeds 180 degrees, it is difficult to rotate in a direction that is smaller than 180 degrees. In this way, the angle α of the stay portion 182a exceeds 180 degrees, so that the rotation is restricted, and the interval between the top plate portion 110 and the leg body 131A connected to the stay portion 182a is maintained, and the rotation of the leg body 131A relative to the top plate portion 110 can be restricted.

[0034] In order to rotate the stay portion 182a beyond 180 degrees against the resistance of the stay portion 182a, the operator presses the cover member 188 located at the overlapping portion of the first stay member 183 and the second stay member 185a in the direction of the arrow as shown in Fig. 10(a). As shown in Fig. 10(b), the angle α of the stay portion 182a exceeds 180 degrees and becomes a predetermined angle, restricting the rotation. At this time, the operator can prevent his / her hand from being pinched between the first stay member 183 and the second stay member 185a by pressing the cover member 188. On the other hand, by setting the angle α of the stay portion 182a to be smaller than 180 degrees, the leg body 131A can move closer to the top plate portion 110, and therefore the leg body 131A can rotate so as to be folded relative to the top plate portion 110.

[0035] Furthermore, the rotation restricting body 181B has a stay portion 182c and a stay portion 182d (see FIG. 3). The stay portion 182c and the stay portion 182d are configured substantially symmetrically, so here, only the stay portion 182c will be described. As shown in FIG. 1 and FIG. 3, the stay portion 182c is disposed between the top panel portion 110 and the first tier horizontal member 138a from above. The stay portion 182c has a first stay member 183, a second stay member 185c, and a cover member 188. The stay portion 182c has a configuration in which the above-mentioned second stay member 185a is replaced with a second stay member 185c having a shorter length. The second stay member 185c is rotatably connected to the mounting portion 122 of the first-stage cross member 138a from above via a bracket 186. The stay portion 182c can restrict the rotation of the leg body 131B relative to the top plate portion 110, similarly to the stay portion 182a. On the other hand, by setting the angle α of the stay portion 182c to an angle smaller than 180 degrees, the leg members 132c and 132d can move closer to the top plate portion 110, and therefore the leg members 132c and 132d can rotate in a folding manner relative to the top plate portion 110.

[0036] Next, a state in which the rotation restricting portion 180 and the top panel portion 110 are connected will be described. Fig. 11 is a bottom view of the top plate 110 and the rotation restricting portion 180. Fig. 12 is a cross-sectional view taken along line II in Fig. 11 in the vertical direction and seen from the direction of the arrow. Stay portions 182a, 182b and stay portions 182c, 182d are indirectly connected via reinforcing members 190a, 190b to the lower surface of top plate portion 110. Note that since reinforcing members 190a and 190b are configured symmetrically in the front-to-back direction, the following description will be centered on reinforcing member 190a. The reinforcing member 190a is a member that distributes the load from the top plate portion 110 and transmits it to the stay portion 182a and the stay portion 182b. The reinforcing member 190a is made of, for example, synthetic resin, iron, or titanium. The reinforcing member 190a is a metallic color such as silver. The reinforcing member 190a is formed by bending a strip-shaped plate, and is disposed along the left-right direction of the top plate portion 110. The reinforcing member 190a is fixed to the top plate portion 110 using bolts, rivets, or the like.

[0037] Specifically, reinforcing member 190a has a bulging portion 191 located in the center in the left-right direction, and connecting portions 192 located on both sides of bulging portion 191. Bulging portion 191 bulges downward and is fixed in a state of contact with rib 115 of top plate portion 110. Connecting portion 192 is fixed in a state in which top plate portion 110 contacts its upper surface and brackets 184 of stay portions 182a and 182b contact its lower surface. In addition, end portion 193 of reinforcing member 190a in the left-right direction is located lower than connecting portion 192 and is fixed to top plate portion 110. Here, the effect of the reinforcing member 190a will be described. Here, it is assumed that a load is received from the top plate portion 110 directly above the stay portion 182a. First, when the reinforcing member 190a is not present, most of the load from the top plate portion 110 is received by one stay portion 182a. On the other hand, when the reinforcing member 190a is present, the load from the top plate portion 110 is also transmitted to the stay portion 182b through the reinforcing member 190a, and can be received by the two stay portions 182a and 182b. Therefore, the strength of the workbench 100 can be improved by having the reinforcing member 190a. Note that, although the reinforcing member 190a and the reinforcing member 190b are described as being separate bodies, the reinforcing member 190a and the reinforcing member 190b may be connected to each other to form an integrated body.

[0038] Next, the closed state in which the legs 130 are folded relative to the top panel 110 will be described. Fig. 13 is a front view showing the workbench 100 in a closed leg state. Fig. 14 is a bottom view showing the workbench 100 in a closed leg state. When folding the legs 130, the lengths of the leg members 132a to 132d are shortened in advance. When folding the legs 130, the top plate 110 is folded so as to be in contact with the floor surface, so that the top plate 110, the leg member 132a, and the leg member 132c overlap from the bottom in this order. In this folded state, the cross members 138a to 138d of the leg 131A and the cross members 138a to 138d of the leg 131B overlap each other in the vertical direction. Specifically, the first tier cross member 138a of leg body 131A overlaps with the fourth tier cross member 138d of leg body 131B, the second tier cross member 138b of leg body 131A overlaps with the third tier cross member 138c of leg body 131B, the third tier cross member 138c of leg body 131A overlaps with the second tier cross member 138b of leg body 131B, and the fourth tier cross member 138d of leg body 131A overlaps with the first tier cross member 138a of leg body 131B. In this way, by overlapping the cross members 138a-138d in the vertical direction, when other workbenches 100 or the like are stacked, the load is received by both the cross members 138a-138d of the leg body 131B and the cross members 138a-138d of the leg body 131A, thereby preventing damage to the leg 130. Note that at least one of the cross members 138a-138d of the leg body 131A and the cross members 138a-138d of the leg body 131B may overlap each other, or they may be partially overlapped by being slightly shifted in the front-rear direction.

[0039] In the closed-leg position, stays 182a, 182b connected to leg 131A are positioned so as to overlap with top plate 110 in the left-right direction. Since there is nothing between leg 131A and top plate 110, second stay member 185a of stays 182a, 182b can be connected to second-stage cross member 138b of leg 131A. On the other hand, the stay parts 182c and 182d connected to the leg 131B are positioned such that the first stay member 183 overlaps with the top plate 110 in the left-right direction, and the second stay member 185c is positioned between the top plate 110 and the leg 131B. Here, since the leg 131A is interposed between the leg 131B and the top plate 110, there is a risk of interference with the second stay member 185c. Therefore, by connecting the second stay member 185c of the stay parts 182c and 182d to the first-stage cross member 138a of the leg 131B, interference with the leg 131A can be prevented. Therefore, the legs 130 can be rotated and folded relative to the top panel 110 so that the rotation restricting portion 180 and the legs 130 do not interfere with each other.

[0040] In the workbench 100 of this embodiment, the rotation restricting body 181A is connected to the second tier cross member 138b of the leg 131A. The lower tier of the cross members 138a to 138d is closer to the floor surface and therefore is more stable with less shaking. Therefore, by connecting the rotation restricting body 181A to the second tier cross member 138b instead of the first tier, the stability of the top plate portion 110 can be improved. Note that the rotation restricting body 181A is not limited to being connected to the second tier cross member 138b, but may be connected to the second or lower tier, i.e., the third tier cross member 138c or the fourth tier cross member 138d. On the other hand, the rotation restricting body 181B is connected to the first-stage horizontal member 138a of the leg 131B. In this way, by connecting the rotation restricting body 181B to the first-stage horizontal member 138a, the leg 131B can be rotated and folded without interfering with the leg 131A. Note that the rotation restricting body 181B is not limited to being connected to the first-stage horizontal member 138a, and can be connected to a horizontal member above the horizontal member to which the rotation restricting body 181A is connected. For example, when the rotation restricting body 181A is connected to the third-stage horizontal member 138c of the leg 131A, the rotation restricting body 181B can be connected to the first-stage horizontal member 138a or the second-stage horizontal member 138b of the leg 131B. Therefore, by connecting the rotation restricting body 181A and the rotation restricting body 181B to the cross members 138a to 138d of different tiers, the stability of the top panel portion 110 can be further improved by the rotation restricting body connected to the cross member of the lower tier.

[0041] Second embodiment In the first embodiment, the workbench 100 in which the legs 131A and 131B have four levels of cross members 138a to 138d has been described, but a workbench having cross members other than four levels may be prepared. In this case, a workbench can be selected according to the height at which the worker works at height. FIG. 15(a) is a diagram showing the configuration of a workbench 200 in which the leg body 131A is two-stage horizontal members 138a and 138b. Here, the first-stage horizontal member 138a of the workbench 200 and the first-stage horizontal member 138a of the workbench 100 of the first embodiment have the same configuration. In other words, the first-stage horizontal member 138a of the workbench 200 and the first-stage horizontal member 138a of the workbench 100 are common members that can be attached to each other even if they are interchanged. Similarly, the second-stage horizontal member 138b of the workbench 200 and the second-stage horizontal member 138b of the workbench 100 are common members that can be attached to each other even if they are interchanged. In this way, they can be interchanged because the main leg 133 of the leg member 132a and the main leg 133 of the leg member 132b are made the same members, but the lengths are different between the workbench 100 and the workbench 200. Furthermore, this is because the spacing and inclination between the main legs 133 of the leg members 132a and the main legs 133 of the leg members 132b are configured to be the same between the work platforms 100 and 200. In this way, by using the cross members 138a and 138b common to the different work platforms 100, 200, management costs and manufacturing costs can be reduced.

[0042] Fig. 15(b) is a diagram showing the configuration of a workbench 210 in which the leg 131A is made up of three tiers of cross members 138a, 138b, and 138c. Here, as in Fig. 15(c), the cross members 138a-138c of the workbench 210 and the cross members 138a-138c of the workbench 100 are common members that can be attached to each other even if they are interchangeable. In this way, by using the common cross members 138a-138c between the different workbenches 100 and 210, it is possible to reduce management costs and manufacturing costs. Such a configuration including the work tables 100, 200, 210, etc. will be referred to as a work table system.

[0043] Although the present invention has been described above with reference to the above-mentioned embodiment, the present invention is not limited to the above-mentioned embodiment, and modifications and the like are possible within the scope of the present invention. In the above embodiment, the leg members 132a to 132d have the extendable legs 134. However, the present invention is not limited to this, and the leg members 132a to 132d do not necessarily have to have the extendable legs 134.

[0044] In the above embodiment, the leg section 130 has four leg members 132a to 132d, but the present invention is not limited to this, and the leg section 130 may have five or more leg members. In this embodiment, the case where the rotation restriction body 181A and the rotation restriction body 181B are connected to the cross members 138a to 138d of different stages has been described, but this is not limited to this case and can be changed as appropriate depending on the issues, etc. [Explanation of symbols]

[0045] 100: Portable workbench 110: Top plate 130: Leg 131A: Leg body 131B: Leg body 132a-132d: Leg member 138a-138d: Cross member 150: Rotating part 180: Rotation restricting part 181A: Rotation restricting body 181B: Rotation restricting body 200: Portable workbench 210: Portable workbench

Claims

1. The top plate and a first leg connected to one end of the top panel in the front-rear direction, which is the longitudinal direction of the top panel; a second leg connected to the other end of the top plate in the front-rear direction, The first leg and the second leg are The fins are opposed to each other at positions spaced apart in the front-rear direction and are inclined so as to move away from each other toward the lower ends, The first leg and the second leg further include: a pair of leg members that face each other at an interval in a left-right direction perpendicular to the front-rear direction and that incline so as to move away from each other toward their lower ends; a plurality of horizontal members that are spanned horizontally between the pair of leg members and on which a worker places his or her feet when ascending or descending; The cross member is A portable workbench characterized in that, when viewed along the left-right direction, the inner end of the top surface that is between the first leg body and the second leg body and the outer end that is not between the first leg body and the second leg body extend inward and outward beyond the leg members.

2. The cross member is 2. The portable work platform according to claim 1, wherein the length of the inward projection is greater than the length of the outward projection.

3. The cross member is 3. A portable workbench according to claim 1, wherein the thickness of the portion extending inward becomes thinner as it extends inward when viewed in the left-right direction.

4. The cross member is A portable workbench as described in any one of claims 1 to 3, characterized in that when viewed along the left-right direction, the maximum thickness of the portion protruding inward is thicker than the maximum thickness of the portion protruding outward.

5. The cross member is 5. The portable workbench according to claim 1, wherein the top surface has a plurality of convex portions or a plurality of concave portions extending in a direction intersecting the longitudinal direction.

6. The cross member is 6. The portable workbench according to claim 5, wherein the upper surface has a plurality of protrusions or recesses along the longitudinal direction.

7. A portable workbench as described in Claim 6, characterized in that the multiple convex ribs or the multiple concave ribs are formed by being interrupted by the multiple convex portions or the multiple concave portions.

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