Work bench

Abstract

To make it easier to identify a tread bar of a main leg and an end of a top plate while movements such as stepping on / off the top plate and standing on the top plate in sequential working processes are performed.SOLUTION: A portable type work bench 1 is configured by putting on a short side of a top plate 3 between a pair of main legs 2 in a ladder shape. For the portable type work bench 1, a color of a tread bar 2b of the main leg 2 and a color of an end 3a of the end part of the top plate 3 to which the main leg 2 is attached are painted yellow to make the color different from colors (ground color of aluminum alloy) of the other parts of the top plate 3 and the main legs 2. Thus, it is achieved to make it easier to identify the tread bar 2b of the main legs 2 and the end 3a of the top plate 3 while movements such as stepping on / off the top plate 3 and standing on the top plate 3 in sequential working processes are performed.SELECTED DRAWING: Figure 4

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 the periphery by a pair of handrail rails and a pair of short-side handrail rails. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2008-255586 A 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 platform and then stands on the platform to perform work. While performing this series of actions, the worker checks the treads of the main landing gear and the edge of the platform.

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

[0006] The workbench of the present invention comprises a top plate and ladder-shaped main legs attached to the ends of the top plate and used for ascending and descending to the top plate, and is characterized in that the color of the treads of the main legs and the color of at least the ends of the top plate to which the main legs are attached are different from the colors of other parts of the top plate and the main legs. Effect of the Invention

[0007] According to the present invention, when performing a series of actions such as climbing up and down to the platform and standing on the platform to work, it is easy to check the treads of the main landing gear and the edge of the platform. [Brief description of the drawings]

[0008] [Figure 1A] FIG. 2 is a front view showing the portable workbench according to the 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. [Diagram 2] 5A, 5B, and 5C are diagrams showing a short-side rail member, in which (a) is a plan view, (b) is a front view, and (c) is a right side view. [Diagram 3] 13 is a diagram showing a state in which the short side rail members are stored along the long side rail members. FIG. [Figure 4] 13 is a perspective view of the main part showing the state in which the short side rail members are bridged. FIG. [Diagram 5] 1 is an oblique view of the main parts of a portable workbench according to an embodiment, illustrating a state in which the workbench is surrounded on three sides by one of a pair of long side rail members and a pair of short side rail members. FIG. [Figure 6] 11A and 11B are diagrams showing the relationship between the support posts and the long side rail members. [Figure 7] FIG. 2 is a diagram showing an example of the configuration of a top plate. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Fig. 1A is a front view showing 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 short 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 installing multiple rungs 2b between a pair of posts 2a. 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 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 up 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, which ensures sufficient strength while reducing weight.

[0011] As shown by the dot patterns in Fig. 4 and Fig. 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 pillar 7 made of a sheath pipe is provided so as to cover the handrail bar 5. The support pillar 7 is made of, for example, a resin tube with a rectangular cross section, and has an inner peripheral surface that closely contacts the outer peripheral surface of the handrail bar 5. The handrail bar 5 and the support pillar 7 are fixed together, for example, by a bolt that passes through both. The resin support pillar 7 is colored yellow to match the color of the tread 2a of the main landing gear 2 and the color of the end portion 3a of the top plate 3. As described in detail below, the support pillars 7 are used to support a pair of long side rail members 8, 8 extending in the longitudinal direction of the tabletop 3 and a pair of short side rail members 9, 9 extending in the transverse 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 portion of the support pillar 7, in other words, above the handrail 5. The long side rail member 8 is made of, for example, a resin tube with a rectangular cross section, both ends of which are rotatably supported on the upper part of the support pillar 7 via mounting brackets 10, and is divided in the middle. This allows the divided bodies 8a, 8b of the long side rail member 8 to be folded and stored along the support pillar 7 and the handrail 5. The resin long side rail member 8 is colored yellow to match the color of the tread 2b of the main landing gear 2 and the color of the end portion 3a of the top plate 3. Then, with the handrails 5 and the corresponding supports 7 erected at the four corners of the tabletop 3, the segments 8a, 8b of the long side rail member 8 can be rotated to a horizontal position so that the end faces collide with each other, bridging the long side rail member 8. The segments 8a, 8b of the long side rail member 8 are detachably connected by a connecting member 11 having a sliding structure, for example.

[0014] Short side rail members 9 are attached to the long side rail members 8, respectively. The pair of short side rail members 9 have a point-symmetric relationship with respect to the center of the table top 3 in terms of their shapes and peripheral structures (attachment structure to the long side rail members 8 and locking structure). The base end 9a of the short-side rail member 9 is rotatably supported on the upper surface (hereinafter simply referred to as the upper surface) 8c of the long-side rail member 8 (divided body 8a) in the spanning state, at a position close to the support post 7. The short-side rail member 9 is formed from a metal bar such as an aluminum alloy or stainless steel, and as shown in Figure 2, the base end 9a is bent downward at 90 degrees to be used as a rotation support part for the long-side rail member 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 bridging position, 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] As shown in FIG. 2, the tip of each of the short side rail members 9 is also bent downward at 90 degrees to serve as a locking projection 9b for the long side rail member 8. As shown in FIG. As shown in Fig. 3, a locking hole 12 is formed in the top surface 8c of the long-side rail member 8 (divided body 8a), into which the locking protrusion 9b of the short-side rail member 9 that supports itself can be inserted. This allows the short-side rail member 9 to be held in the stored state. 4, locking holes 13 are formed in 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 members 8 can be inserted. That is, by rotating the short-side rail members 9 by about 90 degrees in the horizontal direction toward the opposing long-side rail member 8, the locking protrusions 9b of the short-side rail members 9 can be inserted into the locking holes 13. This allows the short-side rail members 9 to be held in a spanning state.

[0016] 2, a handle 9c may be formed by protruding a U-shape from a suitable location of the short side rail member 9. The protruding width of the handle 9c is set to a value that allows the user to easily insert a fingertip into the space formed by the protrusion, and at the same time, does not get in the way when the entire workbench is folded up.

[0017] In the configuration described so far, with the handrails 5 and the associated supports 7 erected at the four corners of the tabletop 3, a pair of long side rail members 8, 8 can be spanned, and then a pair of short side rail members 9, 9 can be spanned. In the portable workbench of this embodiment, as shown in Figure 5, a 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 details of the pair of long side rail members 8, 8 will be explained by referring to the long side rail member in the spanning state as one long side rail member 8A, and the long side rail member in the stored state along the support pillar 7 and the handrail 5 as the other long 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 at the opposing position. However, since the other long side rail member 8B is stored along the support post 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] In this embodiment, therefore, a locking hole 14 into which the locking projection 9b of the short-side rail member 9 is inserted is formed on 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 member 8 is bridged or stored along the support 7 and the handrail 5, and corresponds to the locking portion for locking the short-side rail member in the present invention. This allows the locking projection 9b at the tip of the short-side rail member 9 to be inserted into the locking hole 14 by rotating the short-side rail member 9 horizontally by about 90 degrees + α toward the other long-side rail member 8B in the opposing position. Here, α means an angle equivalent to the positional deviation between the locking hole 13 and the locking hole 14 (see FIG. 4).

[0020] 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 closed by the long side rail member 8. Therefore, when the long side rail member 8 is stored along the support pillar 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 closed. In theory, locking holes 13 and 14 should be positioned on the path of movement of locking projection 9b, i.e., on the same circle centered on base end 9a of short side rail member 9; however, they do not necessarily have to be on the same circle as long as locking projection 9b can be inserted due to 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 the opposing long-side rail member 8A. In this case, the locking projection 9b of the short-side rail member 9 is positioned so as to be out of phase with the locking hole 13 formed in the upper surface 8c of the opposing long-side rail member 8A by 90 degrees. 2, a second locking projection 9d is provided at the tip of the short-side rail member 9, out of phase with the locking projection 9b by 90 degrees. This allows the second locking projection 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 at the opposing position. In this embodiment, the locking projection 9b corresponds to the first locking portion of the present invention, and the second locking projection 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 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 in 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 any of the rail members 8, 9. In use, where the long sides of the tabletop 3 are brought close to a wall or the like, the long side rail members 8 on the wall side can be stored to improve workability. Even in this case, on the three sides other than the wall side, a worker standing on the tabletop 3 can sense that he is approaching the periphery of the tabletop 3 when his upper body approaches any of the rail members 8, 9.

[0023] The portable workbench 1 according to this embodiment can also be used in a state surrounded 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 long side rail member 8 facing it, 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 in such a state that only one of the pair of long side rail members 8, 8 and the pair of short side rail members 9, 9 is hung across.

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

[0025] In addition, although the locking holes 13 and 14 are separately provided in the above embodiment, the present invention is not limited thereto and both may be provided as a common locking hole. For example, as shown by the dashed line in Fig. 6, a hole 15 is formed in the upper surface 8c of the long-side rail member 8 at a position directly below the locking hole 14 in the top surface of the mounting bracket 10. In this case, even when the long-side rail members 8 are bridged as shown in Fig. 6, the locking projection 9b and the second locking projection 9d of the short-side rail member 9 supported by the opposing long-side rail member 8 can be inserted into the hole 15 through the locking hole 14, making the 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 other parts of the top plate 3 and the main landing gear 2. This makes it easier to check 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 to the tabletop 3, the visibility of the tread 2b is improved, and the worker can surely place his or her feet on the treads 2b in order. Also, by coloring not only the tread 2b but also the end 3a of the tabletop 3, the worker can visually confirm the end 3a of the tabletop 3 before ascending to the tabletop 3. In particular, by coloring the tread 2b and the end 3a located above the tread 2b in the same color, the worker can naturally place his or her foot from the tread 2b of the same color to the end 3a of the tabletop 3 of the same color without hesitation.

[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 the approach to the crosspiece members 8, 9 as described above, can easily grasp the working area on the tabletop 3. In this embodiment, only the end 3a of the short side of the tabletop 3 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 may not be able to instantly determine 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 the specific examples of the present invention, and the technical scope of the present invention should not be interpreted as being limited by these embodiments. In other words, the present invention can be embodied in various forms without departing from its technical concept or main features. In the above embodiment, a workbench in which a top plate 3 is spanned 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 includes a top plate and ladder-shaped main legs that are attached to the ends of the top plate and are used to ascend and descend 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 includes only one ladder-shaped main leg that is used to ascend and descend to the top plate.

[0029] 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. 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 short side of the top plate 3 to which the main legs 2 are attached is colored, but all (four sides) of the end of the top plate 3 may be colored. 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. Since construction sites where work platforms are used are environments with many achromatic colors such as gray and metal background colors, it is preferable to use warm colors with high saturation such as yellow, red, and orange in order to improve visibility. In addition, in the above embodiment, the tread 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, a colored cover (which may be made of metal or resin) may be attached to the tread 2b or the end 3a, or a colored sticker may be attached. [Explanation of symbols]

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

Claims

1. The top plate and a ladder-like main leg attached to an end of the tabletop and used for ascending and descending to the tabletop; The main landing gear is configured by a pair of struts and a plurality of treads installed between the struts, The pair of support columns are colored with an aluminum alloy base color, The workbench is characterized in that the color of the entire upper surface of each of the plurality of treads is different from the color of the pair of supports.

2. A top plate, a ladder-like main leg attached to an end of the tabletop and used for ascending and descending to the tabletop; The main landing gear is configured by a pair of struts and a plurality of treads installed between the struts, The pair of support columns are colored with an aluminum alloy base color, A workbench characterized in that the color of the entire first side of the plurality of treads on the ascending / descending side is different from the color of the pair of supports.

3. A top plate, a ladder-like main leg attached to an end of the tabletop and used for ascending and descending to the tabletop; The main landing gear is configured by a pair of struts and a plurality of treads installed between the struts, The pair of support columns are colored with an aluminum alloy base color, The workbench is characterized in that the color of the entire second side of the plurality of treads opposite to the first side on the ascending / descending side is different from the color of the pair of supports.

4. The plurality of treads are: The workbench described in claim 1, characterized in that the entire top surface, the entire first side surface on the side that rises and falls, and the entire second side surface opposite the first side surface are the same color, different from the color of the pair of supports.

5. A workbench described in any one of claims 1 to 4, characterized in that the multiple treads are directly colored by color anodizing or painting.

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