Portable workbench

Abstract

The object is to provide a portable workbench that can improve stability. [Solution] The portable workbench 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, and a first rotation restriction body 181A and a second rotation restriction body 181B that restrict the rotation of the first leg body 131A and the second leg body 131B, respectively, wherein the first leg body 131A and the second leg body 131B each have cross members 138a to 138d of the same number of stages, and the first rotation restriction body 181A and the second rotation restriction body 181B are connected to cross members 138a to 138d of different stages.

Description

Technical Field

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

Background Art

[0002] Conventionally, a portable workbench for performing work at heights has been known. Patent Document 1 discloses a portable workbench including a top plate and a pair of legs.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] This The invention is Make the cross-member easier to view for the purpose of.

Means for Solving the Problems

[0005] The present invention relates to a portable workbench including a top plate portion, a first leg member connected to one end in the front-rear direction, which is the longitudinal direction of the top plate portion, and a second leg member connected to the other end in the front-rear direction of the top plate portion. The first leg member and the second leg member 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 first leg member and the second leg member further include a pair of leg members that face each other with a space therebetween in the left-right direction orthogonal to the front-rear direction and are inclined so as to move away from each other toward the lower end, and a plurality of cross members that are spanned horizontally between the pair of leg members and on which an operator places his / her feet when ascending and descending. The pair of leg members are made of an aluminum alloy and are given a silver color as a first color. The plurality of cross members are made of an aluminum alloy and are given a gold color as a second color different from the first color. The leg member includes a main leg and a telescopic leg that extends and contracts the leg member along the longitudinal direction of the leg member. The telescopic leg has a leg base that grounds the leg member to the floor surface at the lower end. The leg base is given a third color different from the first color and the second color. When viewed along the left-right direction, the The inner end, which is on the side between the first leg and the second leg and The outside, which is not on the side between the first leg and the second leg ends of the upper surface protrude from the leg member more than the Inner and the Outer . The length protruding from the Inner is longer than the length protruding from the Outer . When viewed along the left-right direction, the thickness of the portion protruding from the Inner is thicker than the thickness of the portion protruding from the Outer . [Effect of the Invention]

[0006] According to the present invention, Make the cross-member easier to view can be achieved. [Brief Description of the Drawings]

[0007]

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Figure 8A

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Figure 9A

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Mode for Carrying Out the Invention

[0008] Hereinafter, the portable workbench according to the present embodiment will be described with reference to the drawings. (First Embodiment) The portable workbench 100 is a workbench for workers to perform work at heights. The portable workbench 100 (hereinafter referred to as the workbench 100) in this embodiment is assumed to have a height of, for example, approximately 1000 mm to approximately 1900 mm from the floor surface to the 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 figure, the front side is shown 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 plate portion 110, leg portions 130, an enclosure portion 140, a rotating portion 150, and a rotation restricting portion 180.

[0009] The top plate portion 110 has a function as a foothold for a worker performing work at heights. The top plate portion 110 is rectangular in shape and long in the front-rear direction when viewed from above. The front-rear direction is, for example, approximately 1500 mm in length, and the left-right direction is, for example, approximately 500 mm in length. The top plate portion 110 is configured by connecting a plurality of long top plate members. Specifically, the top plate portion 110 is configured by arranging a plurality (for example, three) of long hand members 111a to 111c that are long along the front-rear direction side by side in the left-right direction and sandwiching and fixing them with the short hand members 112a and 112b from the front and rear using bolts or rivets (see FIG. 4). Note that the rivets include blind rivets. The long hand members 111a to 111c and the short hand members 112a, 112b are, for example, made of an aluminum alloy and are formed by extrusion molding. Also, the long hand members 111a to 111c are, for example, a metallic color such as silver. On the other hand, the short hand members 112a, 112b are, for example, a metallic color such as gold and are colored differently from the long hand members 111a to 111c. Therefore, the worker can easily visually recognize the short hand members 112a, 112b and can easily recognize the position of the end portion of the top plate portion 110. The extruded aluminum alloy is colored, for example, in the anodizing process. The top plate portion 110 has a plurality of protrusions 113 as anti-slip features on the upper surface that serves as the working surface. The protrusions 113 are formed at intervals across the entire surface of the top plate portion 110. The protrusions 113 protrude upward, and a hole is formed in the center.

[0010] Next, the leg portion 130 will be described. The leg portion 130 has the function of supporting the load of the top plate portion 110 and the load of the operator working on the top plate portion 110. Further, the leg portion 130 is connected to the front and rear ends of the top plate portion 110 and is rotatable with respect to the top plate portion 110. By rotating the leg portion 130, the leg portion 130 is folded so as to overlap the top plate portion 110. Specifically, the leg portion 130 has a pair of leg bodies 131A and 131B. The leg body 131A is located at the rear part in the front-rear direction and extends from the top plate portion 110 toward the floor surface. Also, the leg body 131B is located at the front part in the front-rear direction of the top plate portion 110 and extends from the top plate portion 110 toward the floor surface. As shown in FIG. 1, the leg body 131A and the leg body 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 body 131A and the leg body 131B are in a so-called ladder shape, and an operator can move up and down between the top plate portion 110 and the floor surface.

[0011] First, the leg body 131A will be described. The leg body 131A has leg members 132a and 132b and a plurality of cross members 138a to 138d (see FIG. 2). The leg members 132a and 132b are located at both ends in the left-right direction of the top plate portion 110. Also, the leg members 132a and 132b face each other with a space therebetween in the left-right direction and are inclined so as to move away from each other toward the lower end. The leg members 132a and 132b each have a main leg 133 and a telescopic leg 134. The main leg 133 is the main member 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 is, for example, a metallic color such as silver. Also, the main leg 133 is, for example, a member having a substantially rectangular cross-section that is hollow or solid. The main leg 133 has a rotating member 155a, which will be described later, at a position close to the upper end.

[0012] The telescopic leg 134 is a member that expands and contracts the leg members 132a and 132b along the longitudinal direction. The telescopic leg 134 fits inside the main leg 133 and is slidable 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, for example, a metallic color such as silver. Also, the telescopic leg 134 is, for example, a member having a substantially rectangular cross-section that is hollow or solid and whose cross-sectional shape is reduced compared to the main leg 133. The telescopic leg 134 expands and contracts the lengths 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 state in which the leg member 132a is shortened is shown by a two-dot chain line. Also, the telescopic leg 134 has a footrest 135 at the lower end. The footrest 135 is a member that stably grounds the lower ends of the leg members 132a and 132b on the floor surface. The footrest 135 is made of, for example, a soft synthetic resin. The footrest 135 is colored, for example, in orange, blue, green, etc. Also, the footrest 135 is fixed using bolts, rivets, etc. in a state of being fitted onto the outer periphery of the lower end of the telescopic leg 134. By expanding and contracting the leg members 132a and 132b with the telescopic leg 134, the height of the top plate portion 110 can be adjusted. The leg 130 can be adjusted stepwise, for example, at intervals of approximately 60 mm between 0 mm and 400 mm in the height direction. Also, the main leg 133 has a locking mechanism 136. The locking mechanism 136 locks stepwise the length that the telescopic leg 134 protrudes from the lower ends of the leg members 132a and 132b. The locking mechanism 136 is attached to the side surfaces where the leg member 132a and the leg member 132b face each other.

[0013] The horizontal cross members 138a to 138d are so-called treads, which are members on which an operator places their feet when ascending and descending. The horizontal cross members 138a to 138d are spanned horizontally between the main legs 133 of the leg member 132a and the main legs 133 of the leg member 132b. Also, the horizontal cross members 138a to 138d can improve the rigidity of the leg body 131A. Specifically, between the main legs 133 of the leg member 132a and the main legs 133 of the leg member 132b, four horizontal cross members are arranged: the first-stage horizontal cross member 138a, the second-stage horizontal cross member 138b, the third-stage horizontal cross member 138c, and the fourth-stage horizontal cross member 138d. The horizontal cross members 138a to 138d are shorter in the left-right direction in the upper stage and longer in the left-right direction in the lower stage. The horizontal cross members 138a to 138d are fixed to the main legs 133 using bolts, rivets, etc. via brackets. The horizontal cross members 138a to 138d are made of, for example, an aluminum alloy and are formed by extrusion molding. Also, the horizontal cross members 138a to 138d are, for example, hollow or solid members. Here, the horizontal cross members 138a to 138d are colored differently from the leg members 132a and 132b. The horizontal cross members 138a to 138d are, for example, a metallic color such as gold. Therefore, the operator can easily visually recognize the horizontal cross members 138a to 138d and can prevent stepping over the horizontal cross members 138a to 138d when ascending and descending. In this embodiment, the horizontal cross members 138a to 138d and the short hand members 112a and 112b are colored the same.

[0014] FIG. 5 is a diagram showing an example of the configuration of the horizontal cross member 138a. Here, the horizontal cross member 138a will be described, but the horizontal cross members 138b to 138d have the same shape except for the different lengths. FIG. 5(a) is a plan view of the horizontal cross member 138a. FIG. 5(b) is a side view of the horizontal cross member 138a. FIG. 5(c) is a front view (cross-sectional view) of the horizontal cross member 138a, with the main leg 133 shown by a two-dot chain line. FIG. 5(d) is an enlarged cross-sectional view of the concave portion 126 of the horizontal cross member 138a. The transverse frame member 138a has an upper side portion 121, attachment portions 122 and 123, and a lower side portion 124. The upper side portion 121 has an upper surface which is a surface on which an operator's feet are placed. The front portion of the upper side portion 121 protrudes forward of the main leg 133, and the rear portion protrudes rearward of the main leg 133. Therefore, the area of the upper surface of the upper side portion 121 can be enlarged, and the operator can easily place their feet. Further, the upper side portion 121 has a plurality of ridges 125 (or grooves) along the longitudinal direction of the transverse frame member 138a. The ridges 125 can prevent the operator's feet from slipping in the front-rear direction on the upper side portion 121. The ridges 125 can be formed when extrusion molding.

[0015] Furthermore, the upper side portion 121 has a plurality of recesses 126 along a direction intersecting the longitudinal direction of the transverse frame member 138a, specifically, a direction substantially perpendicular thereto. The recesses 126 are formed from the front end to the rear end of the upper side portion 121. Here, the dimension from the upper surface of the upper side portion 121 to the deepest position of the recesses 126 is larger than the dimension from the upper surface of the upper side portion 121 to the highest position of the ridges 125. As shown in FIG. 5(d), the recesses 126 gradually decrease in width as they become deeper, and the bottom is flat. The recesses 126 can prevent the operator's feet from slipping in the left-right direction on the upper side portion 121. The recesses 126 are formed by pressing the upper side portion 121 from above so as to crush it after extrusion molding. However, the recesses 126 may be formed by cutting the upper surface of the upper side portion 121.

[0016] Here, the case where the upper side portion 121 has the recesses 126 has been described, but it is not limited to this case, and it may have at least one of the recesses 126 and the protrusions. The protrusions are provided in a plurality along a direction intersecting the longitudinal direction of the transverse frame member 138a, specifically, a direction substantially perpendicular thereto. Further, the protrusions may be substantially circular in plan view and arranged over the entire upper side portion 121 of the transverse frame member 138a. When forming protrusions, it is preferable that they are members different from the transverse frame member 138a. Here, the leg 131A has been described, but the leg 131B has the same configuration. The leg 131B has leg members 132c, 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 by the leg member 132d and the leg member 132b is replaced by 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 substantially the same height.

[0017] Next, the surrounding portion 140 will be described. The surrounding portion 140 has a function of surrounding the work area of the top plate portion 110. The surrounding portion 140 has support columns 141a to 141d, a pair of longitudinal rail members 142, and a pair of transverse rail members 143. The support columns 141a to 141d are respectively arranged along the substantially vertical direction at the corners of the top plate portion 110. The support columns 141a to 141d are respectively rotatably connected to the upper ends of the leg members 132a to 132d. The pair of longitudinal rail members 142 are spanned between the support column 141a and the support column 141c and between the support column 141b and the support column 141d above the longitudinal ends of the outer peripheral edge of the top plate portion 110. The longitudinal rail member 142 is configured to be divided at substantially the center in the longitudinal direction and is respectively rotatably connected to the upper ends of the support columns 141a to 141d. The pair of transverse rail members 143 are spanned between the pair of longitudinal rail members 142 above the transverse ends of the outer peripheral edge of the top plate portion 110.

[0018] The surrounding portion 140 can be shifted from a state where the transverse rail member 143 is spanned over one longitudinal rail member 142 to a first state along the other longitudinal rail member 142. In the first state, the operator can move back and forth between the top plate portion 110 and the leg 131A or between the top plate portion 110 and the leg 131B. Also, as shown in FIG. 6, the surrounding portion 140 can be shifted from the first state to a second state along the support columns 141a to 141d by rotating the divided longitudinal rail members 142 respectively. Furthermore, as shown in FIG. 7, the enclosure portion 140 can shift from the second state to a third state by rotating the support columns 141a to 141d along the leg members 132a to 132d, respectively. In the third state, the longitudinal side rail member 142 overlaps with the main leg 133 in the left-right direction. In this way, by shifting to the third state, when rotating the leg bodies 131A and 131B to fold them with respect to the top plate portion 110, members including the support columns 141a to 141d that constitute the enclosure portion 140 also rotate together with the leg bodies 131A and 131B.

[0019] Next, the rotating portion 150 will be described. The rotating portion 150 has a function of rotating the leg portion 130 with respect to the top plate portion 110. By rotating the leg portion 130 via the rotating portion 150, the leg portion 130 changes between an open-leg posture in which it supports the top plate portion 110 and a closed-leg posture in which the leg portion 130 overlaps with the top plate portion 110 and is folded. Specifically, the rotating portion 150 has rotating bodies 151a to 151d. The rotating bodies 151a to 151d are respectively disposed between the leg members 132a to 132d and the top plate portion 110. That is, the rotating bodies 151a to 151d are respectively positioned close to the corners of the top plate portion 110. First, the rotating body 151a will be described. Note that the rotating body 151a and the rotating body 151b have a substantially left-right symmetric configuration.

[0020] FIG. 8A(a) is a cross-sectional view showing the configuration around the rotating body 151a as viewed from the front side in the open-leg state. FIG. 8A(b) is a view showing the configuration around the rotating body 151a as viewed in the left-right direction in the open-leg state. Note that FIG. 8A is shown with the enclosure portion 140 omitted. The rotating body 151a has a rotation support member 152a, a rotating member 155a, a rotation 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 substantially plate-shaped. The rotation support member 152a is, for example, a metallic color such as silver. The rotation support member 152a is fixed to the side surface of the top plate portion 110 using bolts, rivets, etc. The rotation support member 152a has a support hole 153a into which a rotation shaft 159 is inserted at the lower part. Further, the rotation support member 152a has a stopper hole 154 into which a stopper member 165 described later is inserted at the upper part. 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 a 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 a metallic color such as silver, for example. The rotating member 155a is located at a position 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, etc. Further, the rotating member 155a 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 upper part of the rotating member 155a, and the second engagement hole 158a is located at the front part of the rotating member 155a. The distances from the communication hole 156a to the first engagement hole 157a and to the second engagement hole 158a are the same. In a state where 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 with the leg member 132a when viewed from the left-right direction. Note that the first engagement hole 157a and the second engagement hole 158a are not limited to through holes and may be bottomed holes. Further, the rotating member 155a may be appropriately formed with ribs that are uneven in the plate thickness direction in order to improve rigidity. The pivot shaft 159 is a member that serves as the center of rotation when the leg member 132a rotates. The pivot shaft 159 passes through the support hole 153a of the pivot support member 152a and the communication hole 156a of the pivot member 155a. The pivot shaft 159 is, for example, a bolt, and is attached so as not to come off by screwing a nut. In this way, the rotating body 151a rotates the leg member 132a via the pivot member 155a about the pivot shaft 159 supported by the pivot support member 152a.

[0022] The stopper mechanism 160a is a mechanism for holding the leg member 132a in either the open leg state or the closed leg state. The stopper mechanism 160a is provided inside the top plate portion 110. The stopper mechanism 160a 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, for example, made of iron and is substantially bar-shaped. The stopper member 165 is, for example, a metallic color such as silver color. The stopper member 165 is arranged along the left-right direction of the top plate portion 110. At this time, the stopper member 165 penetrates through the rib 115 of the long hand member 111a and is slidable along the left-right direction through the rib 115. Specifically, the stopper member 165 has an engaging portion 166 and a lever portion 167. The engaging portion 166 is located at the tip of the stopper member 165 and engages 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 on the opposite side of the engaging portion 166 and is located close to the approximate center in the left-right direction of the top plate portion 110. The lever portion 167 extends in a direction substantially orthogonal to the left-right direction. The engaging portion 166 is constantly biased 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 an intermediate position of the stopper member 165 and the rib 115 of the long hand member 111a. The lever portion 167 is a part where an operator performs an operation of sliding the stopper member 165 in the left-right direction against the biasing 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 operation lever 170. Therefore, actually, the operator operates the operation lever 170 to release the engagement by the engaging portion 166.

[0023] The operation lever 170 is made of, for example, synthetic resin. Also, the operation lever 170 is colored in a color different from that of the stopper member 165. Also, the operation lever 170 is colored in a color different from that of the top plate member of the top plate portion 110. Specifically, the operation lever 170 is, for example, blue. The operation lever 170 is colored, for example, by mixing a coloring agent into a resin material and performing injection molding. Also, the operation lever 170 has a plurality of anti-slip ribs 171 that project annularly in the radial direction from the outer peripheral surface. In this way, by covering the lever portion 167 with the operation lever 170, the diameter of the gripping portion becomes larger, so that the operator can easily perform the operation of releasing the engagement. Further, by coloring the operation lever 170, the operator can easily recognize the operation lever 170.

[0024] Here, with reference to FIGS. 8A and 8B, the operation when the leg member 132a rotates from the open-leg state to the closed-leg state will be described. FIG. 8B(a) is a cross-sectional view showing the configuration around the rotating body 151a as viewed from the front in the closed-leg state. FIG. 8B(b) is a view showing the configuration around the rotating body 151a as viewed from the left-right direction in the closed-leg state. Note that FIG. 8B shows the illustration with the surrounding portion 140 omitted. First, the operator operates the operation lever 170 against the biasing force of the biasing member 168 from the state shown in FIG. 8A to slide the stopper member 165 in the left-right direction. When the stopper member 165 slides, the engaging portion 166 of the stopper member 165 disengages from the first engaging 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 with respect to the top plate portion 110. The operator rotates the leg member 132a in a direction overlapping with the top plate portion 110 about the rotation axis 159 of the rotating body 151a. While the leg member 132a is rotating, the rotating member 155a also rotates as the leg member 132a rotates. While the leg member 132a is rotating, the operator releases the hand from the operation lever 170, so that the engaging portion 166 of the stopper member 165 abuts against the surface of the rotating member 155a by the biasing force of the biasing member 168. Therefore, the rotating member 155a rotates while abutting against the engaging portion 166 of the stopper member 165.

[0025] As shown in FIG. 8B, by rotating the leg member 132a until it becomes substantially parallel to the top plate portion 110, the second engagement hole 158a of the rotating member 155a communicates with the stopper hole 154. Accordingly, the engaging portion 166 of the stopper member 165 is inserted into the second engagement hole 158a by the biasing of the biasing member 168, and the stopper member 165 engages with the rotating member 155a. In this way, the leg member 132a is held in the closed leg state. Note that, 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. However, since the leg member 132a and the leg member 132b are integrally formed 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 rotating member 155a fixed to the leg member 132a and the stopper member 165, and the operation lever 170 for releasing the engagement between the rotating member 155a fixed to the leg member 132b and the stopper member 165 are located adjacent to each other at the center in the left-right direction of the top plate portion 110. Accordingly, an operator can release the engagement on either the leg member 132a side or the leg member 132b side by performing an operation of 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 left-right symmetric configuration, the rotating body 151c will be mainly described below. Also, the rotating body 151c will be described mainly focusing on the differences from the configuration of the rotating body 151a, and the same configurations will be denoted by the same reference numerals and the description will be omitted as appropriate. FIG. 9A(a) is a view showing the configuration around the rotating body 151c as viewed from the left-right direction in the open leg state. FIG. 9A(b) is a cross-sectional view showing the configuration around the rotating body 151c as viewed from the rear side in the open leg state. Note that FIG. 9A is shown with the surrounding portion 140 omitted. The rotating body 151c includes a rotation support member 152c, a rotating member 155c, a rotation shaft 159, and a stopper mechanism 160c. The rotation support member 152c is a member that supports the rotation of the leg member 132c. The rotation support member 152c is, for example, made of iron or titanium and is substantially plate-shaped. The rotation support member 152c is, for example, a metallic color such as silver. The rotation support member 152c has a support hole 153c into which a rotation shaft 159 is inserted at the lower part. The support hole 153c is located below the support hole 153a of the rotation support member 152a described above. However, the stopper hole 154 is located at the same height as the stopper hole 154 of the rotation support member 152a described above. Note that the rotation support member 152c may be appropriately formed with ribs that are uneven in the plate thickness direction in order to improve rigidity.

[0027] The rotation member 155c is a member that engages with the stopper member 165. The rotation member 155c is, for example, made of iron or titanium and is substantially plate-shaped. The rotation member 155c is a metallic color such as silver, for example. The rotation member 155c is located at a position 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 rotation 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 upper part of the rotation member 155c, and the second engagement hole 158c is located at the rear part of the rotation member 155c. The distances from the communication hole 156c to the first engagement hole 157c and to the second engagement hole 158c are the same. In a state where the rotation member 155c is fixed to the side surface of the leg member 132c, the first engagement hole 157c and the second engagement hole 158c are positioned so as not to overlap with the leg member 132c when viewed from the left-right direction. Note that the first engagement hole 157c and the second engagement hole 158c are not limited to through holes and may be bottomed holes. Also, the rotation member 155c may be appropriately formed with ribs that are uneven in the plate thickness direction in order to improve rigidity. The rotating body 151c rotates the leg member 132c via the rotating member 155c about the rotating shaft 159 supported by the rotation support member 152c. However, since the support hole 153c is located below the above-described support hole 153a, the rotating body 151c supports the rotation of the leg member 132c at a position lower than the above-described rotating body 151a. In this way, the position for rotating the leg member 132c is set lower because the leg member 132c does not directly overlap the top plate portion 110, but overlaps via the leg member 132a in the closed leg position. That is, in the closed leg position, in order to make the leg member 132c in the closed leg position horizontal by overlapping the top plate portion 110, the leg member 132a, and the leg member 132c in this order, the position to be rotated is offset downward by approximately the thickness in the front-rear direction of the leg member 132a.

[0028] The stopper mechanism 160c includes a stopper member 165, a biasing member 168, and a lever portion 167. Here, with reference to FIGS. 9A and 9B, the operation when the leg member 132c rotates from the open leg state to the closed leg state will be described. Note that the operations similar to the operation when the leg member 132a rotates from the open leg state to the closed leg state will be appropriately omitted. FIG. 9B(a) is a view showing the configuration around the rotating body 151c as viewed from the left-right direction in the closed leg state. FIG. 9B(b) is a cross-sectional view showing the configuration around the rotating body 151c as viewed from the rear side in the closed leg state. Note that FIG. 9B is shown with the enclosure portion 140 omitted. First, the operator operates the operation lever 170 against the biasing force of the biasing member 168 from the state shown in FIG. 9A to slide the stopper member 165 in the left-right direction. When the stopper member 165 slides, the engaging portion 166 of the stopper member 165 disengages from the first engaging 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 about the rotating shaft 159 of the rotating body 151c in a direction to overlap the leg member 132a.

[0029] As shown in FIG. 9B, by rotating the leg member 132c until it is substantially parallel to the leg member 132a and the top plate portion 110, the second engagement hole 158c of the rotating member 155c communicates with the stopper hole 154. Accordingly, the engaging portion 166 of the stopper member 165 is inserted into the second engagement hole 158c by the biasing of the biasing member 168, and the stopper member 165 engages with the rotating member 155c. In this way, the leg member 132c is held in the closed leg state. Note that, to shift the leg member 132c from the closed leg state to the open leg state, the engagement between the stopper member 165 and the rotating member 155c is released. Here, the leg member 132c has been described. However, since the leg member 132c and the leg member 132d are integrally formed 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 rotating member 155c fixed to the leg member 132c and the stopper member 165, and the operation lever 170 for releasing the engagement between the rotating member 155c fixed to the leg member 132d and the stopper member 165 are located adjacent to each other at the center in the left-right direction of the top plate portion 110. Accordingly, an operator can release the engagement on either the leg member 132c side or the leg member 132d side by performing an operation of 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 with respect to the top plate portion 110. Specifically, the rotation restricting portion 180 includes rotation restricting bodies 181A and 181B (see FIG. 1). The rotation restricting body 181A is located at the rear portion in the front-rear direction and is connected to the top plate portion 110 and the leg body 131A. Accordingly, the rotation restricting body 181A restricts the rotation of the leg body 131A. Further, the rotation restricting body 181B is located at the front portion in the front-rear direction and is connected to the top plate portion 110 and the leg body 131B. Accordingly, the rotation restricting body 181B restricts the rotation of the leg body 131B.

[0031] The rotation restricting body 181A has a stay part 182a and a stay part 182b (see Fig. 2). Since the stay part 182a and the stay part 182b have a substantially bilaterally symmetric configuration, the stay part 182a will be described here. As shown in Figs. 1 and 2, the stay part 182a is disposed across between the top plate part 110 and the second horizontal cross-member 138b from the top. Fig. 10 is a perspective view of an example of the configuration of the stay part 182a seen from an obliquely upper side. Fig. 10(a) shows a state where the angle α of the stay part 182a is smaller than 180 degrees, and Fig. 10(b) shows a state where the angle α of the stay part 182a is larger than 180 degrees. The stay part 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 part 110 via a bracket 184. The second stay member 185a is rotatably connected to the attachment part 122 of the second horizontal cross-member 138b from the top 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 or 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. Also, the first stay member 183 and the second stay member 185a are, for example, a metallic color such as silver color. A rotation shaft 187 is inserted through a 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. Also, the cover member 188 is colored differently from the first stay member 183 and the second stay member 185a. Specifically, the cover member 188 is red, orange, yellow, etc. The cover member 188 is colored, for example, by mixing a colorant into a resin material and performing injection molding. The cover member 188 is attached to an end portion of the first stay member 183 on the side of the rotation axis 187 in the longitudinal direction. Further, the cover member 188 is attached so as to protrude outward from the end portion.

[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 larger than 180 degrees. In this state, since the first stay member 183 and the second stay member 185a are in contact with each other, they do not rotate in a direction in which the angle α becomes larger than the predetermined angle. Also, when exceeding 180 degrees, resistance occurs in the stay portion 182a, and it is necessary to rotate against the resistance. Therefore, once the angle α has exceeded 180 degrees, it is difficult to rotate in a direction to an angle smaller than 180 degrees. In this way, since the rotation of the stay portion 182a is restricted by the angle α of the stay portion 182a exceeding 180 degrees, the distance between the top plate portion 110 and the leg 131A connected to the stay portion 182a is maintained, and the rotation of the leg 131A with respect to the top plate portion 110 can be restricted.

[0034] In addition, in order for the operator to rotate the stay portion 182a beyond 180 degrees against the resistance of the stay portion 182a, as shown in FIG. 10(a), the cover member 188 located at the overlapping portion of the first stay member 183 and the second stay member 185a is pressed in the direction of the arrow. As shown in FIG. 10(b), the rotation is restricted when the angle α of the stay portion 182a exceeds 180 degrees and reaches a predetermined angle. At this time, the operator can prevent pinching his hand 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 an angle smaller than 180 degrees, the leg body 131A can approach the top plate portion 110 side, so that the leg body 131A can be rotated so as to be folded with respect to the top plate portion 110.

[0035] Further, the rotation restricting body 181B has a stay portion 182c and a stay portion 182d (see FIG. 3). Since the stay portion 182c and the stay portion 182d have a substantially left-right symmetric configuration, the stay portion 182c will be described here. As shown in FIGS. 1 and 3, the stay portion 182c is disposed across between the top plate portion 110 and the first-stage horizontal cross 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-described 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 attachment portion 122 of the first-stage horizontal cross member 138a from above via a bracket 186. Similar to the stay portion 182a, the stay portion 182c can restrict the rotation of the leg body 131B with respect to the top plate portion 110. 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 approach the top plate portion 110 side, so that the leg members 132c and 132d can be rotated so as to be folded with respect to the top plate portion 110.

[0036] Next, a state where the rotation restricting portion 180 and the top plate portion 110 are connected will be described. FIG. 11 is a bottom view of the top plate portion 110 and the rotation restricting portion 180 as viewed from below. FIG. 12 is a cross-sectional view taken vertically along the line I-I of FIG. 11 and viewed from the arrow direction. The stay portions 182a, 182b and the stay portions 182c, 182d are indirectly connected to the lower surface of the top plate portion 110 via the reinforcing members 190a, 190b. Since the reinforcing member 190a and the reinforcing member 190b have a symmetric configuration in the front-rear direction, the description will be made centering on the reinforcing member 190a here. The reinforcing member 190a is a member that disperses the load from the top plate portion 110 and transmits it to the stay portions 182a and 182b. The reinforcing member 190a is made of, for example, synthetic resin, iron, or titanium. Also, the reinforcing member 190a is, for example, a metallic color such as silver color. The reinforcing member 190a is formed by bending a strip-shaped plate and is arranged 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, the reinforcing member 190a has a bulging portion 191 located at the center in the left-right direction and connecting portions 192 located on both sides of the bulging portion 191. The bulging portion 191 bulges downward and is fixed in contact with the rib 115 of the top plate portion 110. The connecting portion 192 is fixed in a state where the top plate portion 110 is in contact with the upper surface and the brackets 184 of the stay portions 182a and 182b are in contact with the lower surface. Also, the end portions 193 of the reinforcing member 190a in the left-right direction are located below the connecting portion 192 and are fixed to the 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 there is no reinforcing member 190a, most of the load from the top plate portion 110 is received by one stay portion 182a. On the other hand, when there is a reinforcing member 190a, 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, by having the reinforcing member 190a, the strength of the workbench 100 can be improved. Although the case where the reinforcing member 190a and the reinforcing member 190b are separate bodies has been described, they may be connected between the reinforcing member 190a and the reinforcing member 190b to form an integral structure.

[0038] Next, the closed leg state in which the leg portion 130 is folded with respect to the top plate portion 110 will be described. FIG. 13 is a front view showing the closed state of the workbench 100. FIG. 14 is a bottom view showing the closed state of the workbench 100. When folding the legs 130, the lengths of the leg members 132a to 132d are shortened in advance. Further, when folding the legs 130, since the top plate portion 110 is folded so as to be in contact with the floor surface, the top plate portion 110, the leg member 132a, and the leg member 132c overlap in this order from the lower side. In the folded state in this way, the horizontal members 138a to 138d of the leg body 131A and the horizontal members 138a to 138d of the leg body 131B overlap in the vertical direction. Specifically, the first-stage horizontal member 138a of the leg body 131A overlaps with the fourth-stage horizontal member 138d of the leg body 131B, the second-stage horizontal member 138b of the leg body 131A overlaps with the third-stage horizontal member 138c of the leg body 131B, the third-stage horizontal member 138c of the leg body 131A overlaps with the second-stage horizontal member 138b of the leg body 131B, and the fourth-stage horizontal member 138d of the leg body 131A overlaps with the first-stage horizontal member 138a of the leg body 131B. In this way, since the horizontal members 138a to 138d overlap in the vertical direction, when stacking other workbenches 100 or the like, both the horizontal members 138a to 138d of the leg body 131B and the horizontal members 138a to 138d of the leg body 131A receive the load, so that damage to the legs 130 can be prevented. Note that at least one of the horizontal members 138a to 138d of the leg body 131A and the horizontal members 138a to 138d of the leg body 131B may overlap with each other, and a part may overlap by being slightly displaced in the front-rear direction.

[0039] Further, in the closed state, the stay portions 182a and 182b connected to the leg body 131A are positioned so as to overlap with the top plate portion 110 in the left-right direction. Here, since there is nothing intervening between the leg body 131A and the top plate portion 110, the second stay member 185a of the stay portions 182a and 182b can be connected to the second-stage horizontal member 138b of the leg body 131A. On one hand, the stay parts 182c and 182d connected to the leg body 131B are positioned such that the first stay member 183 overlaps with the top plate part 110 in the left - right direction, and the second stay member 185c is positioned between the top plate part 110 and the leg body 131B. Here, since the leg body 131A is interposed between the leg body 131B and the top plate part 110, there is a risk of interference with the second stay member 185c. Therefore, the second stay member 185c of the stay parts 182c and 182d is connected to the first - stage horizontal cross - member 138a of the leg body 131B, thereby preventing interference with the leg body 131A. Therefore, the leg part 130 can be rotated with respect to the top plate part 110 and folded so that the rotation restricting part 180 and the leg part 130 do not interfere with each other.

[0040] In the workbench 100 of the present embodiment, the rotation restricting body 181A is connected to the second - stage horizontal cross - member 138b of the leg body 131A. Since the horizontal cross - members 138a - 138d are closer to the floor surface as they are in the lower stage, they have less sway and are stable. Therefore, by connecting the rotation restricting body 181A to the second - stage horizontal cross - member 138b instead of the first - stage one, the stability of the top plate part 110 can be improved. Note that the rotation restricting body 181A is not limited to being connected to the second - stage horizontal cross - member 138b, and it may be connected to a horizontal cross - member at or below the second - stage, that is, the third - stage horizontal cross - member 138c or the fourth - stage horizontal cross - member 138d. On the other hand, the rotation restricting body 181B is connected to the first - stage horizontal cross - member 138a of the leg body 131B. In this way, by connecting the rotation restricting body 181B to the first - stage horizontal cross - member 138a, the leg body 131B can be rotated and folded without interfering with the leg body 131A. Note that the rotation restricting body 181B is not limited to being connected to the first - stage horizontal cross - member 138a, and it can be connected to a horizontal cross - member above the horizontal cross - 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 cross - member 138c of the leg body 131A, the rotation restricting body 181B can be connected to the first - stage horizontal cross - member 138a or the second - stage horizontal cross - member 138b of the leg body 131B. Therefore, by connecting the rotation restrictors 181A and 181B to the horizontal members 138a to 138d at different levels, the stability of the top plate portion 110 can be further improved by the rotation restrictor connected to the lower horizontal member.

[0041] (Second Embodiment) In the first embodiment, the leg bodies 131A and 131B of the workbench 100 having four levels of horizontal members 138a to 138d have been described, but a workbench having horizontal members other than four levels may be prepared. In this case, the operator can select a workbench according to the height at which the operator performs high-altitude work. FIG. 15(a) is a diagram showing the configuration of a workbench 200 in which the leg body 131A is the two-level horizontal members 138a and 138b. Here, the first-level horizontal member 138a of the workbench 200 has the same configuration as the first-level horizontal member 138a of the workbench 100 in the first embodiment. In other words, the first-level horizontal member 138a of the workbench 200 and the first-level 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-level horizontal member 138b of the workbench 200 and the second-level horizontal member 138b of the workbench 100 are common members that can be attached to each other even if they are interchanged. Thus, they can be interchanged because the main legs 133 of the leg member 132a and the main legs 133 of the leg member 132b are the same members with only different lengths between the workbench 100 and the workbench 200. Furthermore, it is because the intervals and inclinations between the main legs 133 of the leg member 132a and the main legs 133 of the leg member 132b have the same configuration between the workbench 100 and the workbench 200. In this way, by using the common horizontal members 138a and 138b between different workbenches 100 and 200, the management cost and the manufacturing cost can be reduced.

[0042] FIG. 15(b) is a diagram showing the configuration of the workbench 210 in which the leg members 131A are three-stage horizontal members 138a, 138b, and 138c. Here too, similar to FIG. 15(c), the horizontal members 138a to 138c of the workbench 210 and the horizontal members 138a to 138c of the workbench 100 are common members that can be attached to each other even if they are interchanged. In this way, by using the common horizontal members 138a to 138c between different workbenches 100 and 210, the management cost and the manufacturing cost can be reduced. A configuration having such workbenches 100, 200, 210, etc. is referred to as a workbench system.

[0043] As described above, the present invention has been described with reference to the above-described embodiments. However, the present invention is not limited to the above-described embodiments only, and changes and the like are possible within the scope of the present invention. In the above-described embodiment, the leg members 132a to 132d having the telescopic legs 134 have been described. However, the present invention is not limited to this case, and the telescopic legs 134 may not be provided.

[0044] In the above-described embodiment, the legs 130 having the four leg members 132a to 132d have been described. However, the present invention is not limited to this case, and the legs 130 may have five or more leg members. In the present embodiment, the case where the rotation restricting bodies 181A and 181B are connected to the horizontal members 138a to 138d of different stages has been described. However, the present invention is not limited to this case, and it can be appropriately changed according to problems and the like.

Explanation of Reference Numerals

[0045] 100: Portable workbench 110: Top plate portion 130: Legs 131A: Leg body 131B: Leg body 132a to 132d: Leg members 138a to 138d: Horizontal members 150: Rotating portion 180: Rotation restricting portion 181A: Rotation restricting body 181B: Rotation restricting body 200: Portable workbench 210: Portable workbench

Claims

1. A top plate portion, a first leg member connected to one end in the front-rear direction, which is the longitudinal direction of the top plate portion, a second leg member connected to the other end in the front-rear direction of the top plate portion, and a portable workbench comprising: the first leg member and the second leg member 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 first leg member and the second leg member further a pair of leg members that face each other with a space therebetween in the left-right direction orthogonal to the front-rear direction and are inclined so as to move away from each other toward the lower end, a plurality of cross members that are spanned horizontally between the pair of leg members and on which an operator places his or her feet when ascending and descending, the pair of leg members are made of an aluminum alloy and are given a silver color as a first color, the plurality of cross members are made of an aluminum alloy and are given a gold color as a second color different from the first color, the leg member has a main leg and a telescopic leg that expands and contracts the leg member along the longitudinal direction of the leg member, the telescopic leg has a leg base at the lower end for grounding the leg member on the floor surface, the leg base is given a third color different from the first color and the second color, the cross member when viewed along the left-right direction, the inner end portion on the side between the first leg member and the second leg member and the outer end portion on the side not between the first leg member and the second leg member of the upper surface protrude inward and outward from the leg member, and the length protruding inward is longer than the length protruding outward, A portable workbench, characterized in that when viewed along the left-right direction, the thickness of the portion protruding inward is thicker than the thickness of the portion protruding outward.

2. The top plate portion is configured by arranging a plurality of long members that are long along the front-rear direction side by side in the left-right direction and sandwiching and fixing them with a pair of short members from both sides in the front-rear direction, The short member is made of an aluminum alloy and is given a gold color by anodizing as the second color, according to the portable workbench according to claim 1.

3. The cross member has at least one of a concave portion and a convex portion on the upper surface along a direction intersecting the longitudinal direction of the cross member, according to the portable workbench according to claim 1 or 2.

Images