Workbench

Abstract

To make it easier to check the treads of a main landing gear and the edge of a top plate when performing a series of actions such as ascending and descending to the top plate and standing on the top plate to work. [Solution] A portable work platform 1 has a top plate 3 with its shorter side spanning between a pair of ladder-shaped main legs 2. In this portable work platform 1, the color of the treads 2b of the main legs 2 and the color of the end 3a of the top plate 3 to which the main legs 2 are attached are yellow, which is different from the color (base color of aluminum alloy) of the other parts of the top plate 3 and main legs 2. This makes it easier to see the treads 2b of the main legs 2 and the end 3a of the top plate 3 when performing a series of actions such as climbing up and down the top plate 3 and standing on the top plate 3 to work.

Description

[Technical Field]

[0001] The present invention relates to a workbench suitable for use in work at construction sites and the like. [Background technology]

[0002] Work platforms are sometimes used for work at construction sites, etc. As an example of this type of work platform, Patent Document 1 discloses a portable work platform in which a top plate is spanned between a pair of ladder-shaped main legs, handrail posts are erected at the four corners of the top plate, and the top plate is surrounded above its peripheral edge by a pair of handrail rails and a pair of short-side handrail rails. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-255586 Summary of the Invention [Problem to be solved by the invention]

[0004] The worker uses the ladder-like main landing gear to climb up and down to the top plate and then stands on the top plate to work, but while performing this series of actions, the worker checks the treads of the main landing gear and the edge of the top plate.

[0005] The present invention has been made in consideration of the above points, and when performing a series of actions such as climbing up and down to the tabletop and standing on the tabletop to work, The main landing gear treads To make it easier to check the edge of a top plate. [Means for solving the problem]

[0006] The workbench of the present invention comprises a rectangular top plate, ladder-shaped main landing gears attached to the ends of the top plate and used for ascending and descending to the top plate, handhold bars erected at the four corners of the top plate, and a pair of rail members supported by the handhold bars and arranged parallel to the ends of the top plate perpendicular to the ends to which the main landing gears are attached, the outer surfaces of the rail members being colored in a warm color, and the treads of the main landing gears being colored in a warm color. colored The color and the upper surface of at least the end of the top plate to which the main landing gear is attached and the upper part of the tread to The color of the side surface on which the top plate is located is the same as that of the other portions of the top plate and the main legs, and is different from that of the other portions of the top plate and the main legs. [Effects of the Invention]

[0007] According to the present invention, when performing a series of actions such as climbing up and down to the tabletop and standing on the tabletop to work, The main landing gear treads This makes it easier to check the edges of the top plate. [Brief explanation of the drawings]

[0008] [Figure 1A] FIG. 1 is a front view showing a portable workbench according to an embodiment. [Figure 1B] FIG. 2 is a left side view showing the portable workbench according to the embodiment. [Figure 1C] FIG. 2 is a plan view showing a portion of the portable workbench according to the embodiment. [Figure 2] 10A, 10B, and 10C are diagrams showing a short-side rail member, in which FIG. 10A is a plan view, FIG. 10B is a front view, and FIG. 10C is a right side view. [Figure 3] 10 is a diagram showing a state in which the short-side rail members are stored along the long-side rail members. FIG. [Figure 4] FIG. 10 is a perspective view of the main part showing the state in which the short-side rail members are bridged. [Figure 5] FIG. 10 is an oblique view of the main parts of the portable workbench of the embodiment, showing the state in which it is in use, surrounded on three sides by one of a pair of long-side rail members and a pair of short-side rail members. [Figure 6] 10A and 10B are diagrams showing the relationship between the support posts and the long side rail members. [Figure 7]FIG. 2 is a diagram illustrating an example of the configuration of a top plate. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Fig. 1A is a front view of a portable workbench 1 according to an embodiment, Fig. 1B is a left side view, and Fig. 1C is a plan view showing a part of the portable workbench 1 according to an embodiment. In the portable work platform 1 according to this embodiment, the shorter side of the top plate 3 is spanned between a pair of ladder-shaped main legs 2. The ladder-shaped main legs 2 are configured by a pair of support posts 2a and multiple rungs 2b. Each main leg 2 is rotatably attached to the top plate 3 and can be folded and stored behind the top plate 3. A bendable stay 4 is interposed midway between the top plate 3 and the main legs 2.

[0010] The top plate 3 is a rectangular plate material, and handrails 5 made of tubular bodies with a rectangular cross section are erected at its four corners. The handrails 5 are used by workers to hold on to when ascending or descending using the main landing gear 2 or when working on the top plate 3. The handrails 5 are attached to the main landing gear 2 via mounting brackets 6, and can be folded and stored along the main landing gear 2. The main landing gear 2, top plate 3 and handrail 5 are made of, for example, an aluminum alloy, ensuring sufficient strength while reducing weight.

[0011] As shown by the dotted patterns in Figures 4 and 5, the step 2b of the main landing gear 2 and the end 3a of the top plate 3 on the short side to which the main landing gear 2 is attached are colored. Specifically, the step 2b of the main landing gear 2 and the end 3a of the top plate 3 are colored yellow by color anodizing or painting. At least the top surface 3b and the side surface 3c located above the step 2b of the end 3a of the top plate 3 are colored, and the top surface 3b is colored in a strip shape along the short side. The other parts of the top plate 3 and the main landing gear 2 are the base color of the aluminum alloy.

[0012] Next, a configuration in which the work space above the top board 3 is surrounded by a pair of long-side rail members 8, 8 and a pair of short-side rail members 9, 9 will be described. A support post 7 made of a sheath pipe is provided so as to cover the handrail rod 5. The support post 7 is made of, for example, a resin-made tube with a rectangular cross section, and has an inner peripheral surface that closely contacts the outer peripheral surface of the handrail rod 5. The handrail rod 5 and the support post 7 are fixed together, for example, by a bolt that passes through both. The resin support post 7 is colored yellow to match the color of the tread 2a of the main landing gear 2 and the color of the end 3a of the top plate 3. As described in detail below, the support pillars 7 are used to support a pair of longitudinal side rail members 8, 8 extending in the longitudinal direction of the tabletop 3 and a pair of narrow side rail members 9, 9 extending in the narrow direction of the tabletop 3 above the peripheral edge of the tabletop 3, using the handrails 5 at the four corners of the tabletop 3.

[0013] A pair of longitudinal rail members 8, 8 are attached to the upper part of the support post 7, in other words, above the handrail 5. The longitudinal side rail members 8 are made of, for example, resin pipes with a rectangular cross section, and both ends of the pipes are rotatably supported on the tops of the struts 7 via mounting brackets 10, and the pipes are divided in the middle. This allows the divided bodies 8a, 8b of the longitudinal side rail members 8 to be folded and stored along the struts 7 and the handrails 5. The resin longitudinal side rail members 8 are colored yellow to match the color of the treads 2b of the main landing gear 2 and the color of the end portions 3a of the top panel 3. Then, with the handrails 5 and the accompanying support posts 7 erected at the four corners of the top panel 3, the segments 8a, 8b of the longitudinal rail member 8 can be rotated to a horizontal position so that the end faces abut against each other, bridging the longitudinal rail member 8. The segments 8a, 8b of the longitudinal rail member 8 are detachably connected by, for example, connecting members 11 with a sliding structure.

[0014] A short-side rail member 9 is attached to each of the long-side rail members 8. The pair of short-side rail members 9 have point symmetry with respect to the center of the table top 3 in terms of their shapes and peripheral structures (attachment structure and locking structure to the long-side rail members 8). The base end portions 9a of the short-side rail members 9 are rotatably supported on the upper surfaces (hereinafter simply referred to as the upper surfaces) 8c of the long-side rail members 8 (divided bodies 8a) in the spanning state, at a position close to the support posts 7. The short-side rail members 9 are formed from metal rods made of, for example, aluminum alloy or stainless steel, and as shown in FIG. 2, the base end portions 9a are bent downward at 90 degrees to be used as a rotation support portion for the long-side rail members 8. In this way, the base ends 9a of the short-side rail members 9 are rotatably supported on the upper surfaces 8c of the long-side rail members 8, so that the short-side rail members 9 can be stored along the long-side rail members 8. Furthermore, when the long-side rail members 8 are in a spanning state, the short-side rail members 9 supported by the long-side rail members 8 can rotate about a vertical axis, and can be rotated horizontally toward the opposing long-side rail member 8.

[0015] 2, the tip of each of the short-side rail members 9 is also bent downward at an angle of 90 degrees to serve as a locking projection 9b for the long-side rail member 8. As shown in FIG. As shown in Figure 3, locking holes 12 are formed on the top surfaces 8c of the long-side rail members 8 (divided bodies 8a), into which the locking protrusions 9b of the short-side rail members 9 that support themselves can be inserted. This allows the short-side rail members 9 to be held in the stored state. 4, locking holes 13 are formed on the top surfaces 8c of the long-side rail members 8 (divided bodies 8b), into which the locking protrusions 9b of the short-side rail members 9 supported by the opposing long-side rail member 8 can be inserted. That is, by rotating the short-side rail member 9 by about 90 degrees horizontally toward the opposing long-side rail member 8, the locking protrusions 9b of the short-side rail member 9 can be inserted into the locking holes 13. This allows the short-side rail member 9 to be held in a spanning state.

[0016] 2, handles 9c may be formed by protruding a U-shape from appropriate locations on the short-side rail members 9. The protruding width of the handles 9c is set to a value that allows the user to easily insert their fingertips into the space formed by the protrusion, while at the same time not getting in the way when the entire workbench is folded up.

[0017] In the configuration described so far, a pair of short-side rail members 9, 9 can be spanned, assuming that a pair of long-side rail members 8, 8 are spanned with handrails 5 and the corresponding support posts 7 erected at the four corners of the tabletop 3. In the portable workbench of this embodiment, as shown in Figure 5, the pair of short-side rail members 9, 9 can be spanned even when only one of the pair of long-side rail members 8, 8 is spanned. Below, the pair of longitudinal side rail members 8, 8 will be described in detail, with the longitudinal side rail member in the spanning state referred to as one longitudinal side rail member 8A, and the longitudinal side rail member in the stored state along the support post 7 and handrail bar 5 referred to as the other longitudinal side rail member 8B.

[0018] As described above, the short-side rail member 9 supported by one of the long-side rail members 8A can be rotated horizontally toward the other long-side rail member 8B located opposite it. However, since the other long side rail member 8B is stored along the support 7 and the handrail 5, the position of the locking hole 13 is such that the locking protrusion 9b of the short side rail member 9 cannot be inserted.

[0019] Therefore, in this embodiment, a locking hole 14 into which the locking protrusion 9b of the short-side rail member 9 is inserted is formed in the top surface of the mounting bracket 10 (mounting bracket supporting the divided body 8b). The position of the locking hole 14 remains unchanged whether the long-side rail members 8 are in a spanning position or when the long-side rail members 8 are stored along the support posts 7 and the handrails 5, and corresponds to the locking portion for locking the short-side rail member in this invention. As a result, by rotating the short-side rail member 9 horizontally by approximately 90 degrees + α toward the other long-side rail member 8B in the opposing position, the locking protrusion 9b at its tip can be inserted into the locking hole 14. Note that α refers to the angle corresponding to the positional deviation between the locking holes 13 and 14 (see Figure 4).

[0020] In this case, as shown in Figure 6, depending on the mounting structure between the mounting bracket 10 and the long-side rail member 8, the lower part of the locking hole 14 on the top surface of the mounting bracket 10 may be blocked by the long-side rail member 8. Therefore, when the long-side rail member 8 is stored along the support 7 and the handrail 5, a recess 8d is formed at the end of the long-side rail member 8 so that the locking hole 14 is not blocked. In theory, the locking holes 13 and 14 must be positioned on the path of movement of the locking protrusion 9b, i.e., on the same circle centered on the base end 9a of the short-side rail member 9; however, they do not necessarily have to be on the same circle as long as the locking protrusion 9b can be inserted due to the play in each part.

[0021] On the other hand, the short-side rail member 9 supported by the other long-side rail member 8B is rotatable about a horizontal axis and can be rotated vertically toward one of the long-side rail members 8A located opposite it. In this case, the locking protrusion 9b of the short-side rail member 9 is positioned 90 degrees out of phase with the locking hole 13 formed in the upper surface 8c of the opposing long-side rail member 8A. 2, a second locking protrusion 9d is provided at the tip of the short-side rail member 9, out of phase with the locking protrusion 9b by 90 degrees. This allows the second locking protrusion 9d at the tip to be inserted into the locking hole 13 by rotating the short-side rail member 9 vertically toward one of the long-side rail members 8B that faces it. In this embodiment, the locking protrusion 9b corresponds to the first locking portion of the present invention, and the second locking protrusion 9d corresponds to the second locking portion of the present invention.

[0022] The portable workbench 1 of this embodiment can be selectively set up in either a usage state in which it is surrounded on all four sides by a pair of long side rail members 8, 8 and a pair of short side rail members 9, 9, or a usage state in which it is surrounded on three sides by one of the pair of long side rail members 8, 8 and a pair of short side rail members 9, 9. In normal use, by surrounding the tabletop 3 on all four sides, a worker standing on the tabletop 3 can sense that he is standing near the periphery of the tabletop 3 when his upper body approaches one of the crosspieces 8, 9. When the long sides of the tabletop 3 are placed close to a wall or the like, the long side crosspieces 8 on the wall side can be stored to improve workability. Even in this case, a worker standing on the tabletop 3 on the three sides other than the wall side can sense that he is approaching the periphery of the tabletop 3 when his upper body approaches one of the crosspieces 8, 9.

[0023] The portable workbench 1 according to this embodiment can also be used in a state where it is enclosed on two sides. For example, a pair of long-side rail members 8, 8 can be hung across, and a pair of short-side rail members 9, 9 can be stored. Alternatively, a pair of long-side rail members 8, 8 can be stored, and a pair of short-side rail members 9, 9 can be hung across. In other words, when a pair of long-side rail members 8 are stored, the short-side rail member 9 can be rotated vertically toward the opposing long-side rail member 8, and the locking protrusion 9b at its tip can be inserted into the locking hole 14 on the top surface of the mounting bracket 10. Furthermore, it is also possible to use the device with only one of the pair of long side rail members 8, 8 and the pair of short side rail members 9, 9 suspended across the device.

[0024] The shapes and structures of each part, including the long side railing members 8 and the short side railing members 9, are merely examples and are not limited to these. For example, although a configuration in which the support posts 7 are separately provided on the handrail 5 has been described, a configuration in which the handrail 5 directly supports a pair of long side railing members 8, 8 and a pair of short side railing members 9, 9 may also be used.

[0025] Furthermore, while the configuration has been described in which locking holes 13 and 14 are provided separately, this is not limiting and both may be provided as a common locking hole. For example, as shown by the dashed line in Fig. 6, hole 15 is formed in the upper surface 8c of long-side rail member 8 at a position directly below locking hole 14 on the top surface of mounting bracket 10. In this case, even when long-side rail members 8 are bridged as shown in Fig. 6, locking protrusion 9b and second locking protrusion 9d of short-side rail member 9 supported by the opposing long-side rail member 8 can be inserted from locking hole 14 into hole 15, making locking hole 13 in the above embodiment unnecessary.

[0026] As described above, in the portable work platform 1 according to this embodiment, the tread 2b of the main landing gear 2 and the end 3a of the top plate 3 to which the main landing gear 2 is attached are colored yellow, which is different from the color (base color of aluminum alloy) of the other parts of the top plate 3 and the main landing gear 2. This makes it easier to see the tread 2b of the main landing gear 2 and the end 3a of the top plate 3 when performing a series of actions such as climbing up and down the top plate 3 and standing on the top plate 3 to work. Specifically, when a worker ascends or descends onto the tabletop 3, the visibility of the treads 2b is improved, and the worker can reliably place his or her feet on the treads 2b one by one. Furthermore, by coloring not only the treads 2b but also the end 3a of the tabletop 3, the worker can visually identify the end 3a of the tabletop 3 before ascending onto the tabletop 3. In particular, by coloring the treads 2b and the end 3a located above the treads 2b in the same color, the worker can naturally place his or her foot from the treads 2b of the same color to the end 3a of the tabletop 3 of the same color without any confusion.

[0027] In addition, a worker working while standing on the tabletop 3 can visually confirm the position of the end 3a of the tabletop 3, and thus, in addition to being able to sense approach to the crosspiece members 8 and 9 as described above, can easily grasp the work area on the tabletop 3. In this embodiment, only the end 3a of the tabletop 3 on the short side to which the main legs 2 are attached, in other words, the end 3a which is the lifting position, is colored. While working on the tabletop 3, the worker may change direction many times, and it may become impossible to determine for an instant which side of the tabletop 3 is the lifting position. Even in this case, the lifting position can be easily determined by simply visually checking the colored end 3a of the tabletop 3.

[0028] Although the present invention has been described above with reference to the embodiments, the above embodiments are merely illustrative of specific examples of how the present invention can be implemented, and the technical scope of the present invention should not be construed as being limited by these embodiments. In other words, the present invention can be implemented in various forms without departing from its technical concept or main features. In the above embodiment, a workbench having a top plate 3 suspended between a pair of ladder-shaped main legs 2 is used as an example, but this is merely one example of a workbench to which the present invention can be applied. The present invention can be applied to any workbench that has a top plate and ladder-shaped main legs attached to the ends of the top plate and used to climb up and down to the top plate, and the specific shapes of each part are not limited. For example, the present invention can also be applied to a workbench such as a stepladder that has only one ladder-shaped main leg used to climb up and down to the top plate.

[0029] Furthermore, in the above embodiment, the top plate 3 is illustrated in a simplified schematic manner, but the top plate 3 may be composed of frames 31, 31 constituting one pair of four sides, frames 32, 32 constituting the other pair of sides, and a plate material 33 supported by these frames 31, 32, as shown in Fig. 7, for example. For example, when the main legs 2 are attached to the end portions 3a on the frame 31, 31 side, the frames 31, 31 colored yellow may be assembled to the frame 32 and the plate material 33.

[0030] In the above embodiment, only the end 3a of the top plate 3 on the short side to which the main legs 2 are attached is colored, but it is also possible to color the ends of all (four sides) of the top plate 3. In this case, a worker working on the top plate 3 can visually recognize the four sides of the top plate 3. In the above embodiment, the color of the tread 2b of the main landing gear 2 and the color of the end 3a of the top plate 3 are yellow, but they may be colors other than yellow. Construction sites where work platforms are used are environments where achromatic colors such as gray and metallic background colors are common, so to improve visibility, highly saturated warm colors such as yellow, red, and orange are preferred. In addition, in the above embodiment, the step 2b of the main landing gear 2 and the end 3a of the top plate 3 are directly colored by color anodizing or painting, but this is not limited to this. For example, it is also possible to attach a colored cover (which may be made of metal or resin) to the step 2b or the end 3a, or to attach a colored sticker. [Explanation of symbols]

[0031] 1: portable work platform, 2: main landing gear, 3: top plate, 5: handrail, 7: support, 8: long side crosspiece, 9: short side crosspiece, 9b: locking projection, 9d: second locking projection, 13, 14: locking hole

Claims

1. A rectangular top plate and A ladder-like main leg attached to an end of the tabletop and used for ascending and descending to the tabletop; Grab bars erected at the four corners of the top plate; a pair of crosspiece members supported by the handrails and arranged parallel to an end of the top plate perpendicular to the end to which the main landing gear is attached, The outer peripheral surface of the crosspiece is a warm color, A workbench characterized in that the color of the treads of the main landing gear is the same as the color of the upper surface of at least the end of the top plate to which the main landing gear is attached and the color of the side surface located above the treads, and is different from the color of other parts of the top plate and the main landing gear.

2. a support pillar made of a sheath pipe that supports the crosspiece member and is provided so as to cover the handrail; 2. The workbench according to claim 1, wherein the outer surface of the support column is a warm color.

3. The cross-section of the crosspiece is rectangular, 3. The workbench according to claim 1, wherein the four outer surfaces of the crosspiece are colored in a warm color.

4. The support pillar has a rectangular cross section; The workbench according to claim 2, wherein the four outer surfaces of the support column are colored in a warm color.

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