Work device

Abstract

To provide a work device that enables passage through a narrow entrance / exit to a construction site and can be used without restrictions in construction work on the site.SOLUTION: Provided is a work device used in the installation of ceiling panels. It has a substantially rectangular frame-shaped perimeter wall 2 with two sets of left and right side walls 21, 22 and front and rear walls 23, 24 facing each other, four wheels FL, FR, RL, RR provided at the lower ends of the four corners of the perimeter wall 2, respectively, which can be rolled freely, and a work platform 7 that can be detachably attached to the perimeter wall 2 and allows two workers to ride on it. The left and right side walls 21, 22 are configured to be foldable around vertical axes 56, 62 of three first hinges 55 and two second hinges 61 between the front and rear walls 23, 24 with the work platform 7 detached. Electric motors 81 capable of braking and forward and reverse rotation are provided on the front left and right wheels FL, FR, and each electric motor 81 is individually remote-controlled by an operating switch.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a work device used when performing work on a work object such as a ceiling panel or a lighting fixture near a ceiling. [Background technology]

[0002] Generally, construction work for ceiling panels and other construction objects is carried out manually by multiple workers using scaffolding set up on the floor at a height that allows the workers to reach the ceiling. Furthermore, construction work for lighting fixtures, air conditioning equipment, and other construction objects is also carried out manually by workers using scaffolding set up on the floor of the construction site.

[0003] Furthermore, there has also been a conventional work device in which downwardly extending leg members are fixed to the four corners of a roughly rectangular, flat work platform on which a worker can stand, casters are provided at the bottom end of each leg member, and drive wheels are provided at the bottom end of a handle that passes vertically through the work platform, and the drive wheels are steered by rotating the handle around its axis to move along the floor surface (see Patent Document 1).In this case, a drive mechanism, including drive wheels, an electric motor, a reduction gear, and a battery as a power source, is attached to the handle. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 61-129059 Summary of the Invention [Problem to be solved by the invention]

[0005] In conventional work devices, the size of the work platform must be set to a certain extent to allow for multiple workers to ride on the work device in order to improve work efficiency.

[0006] In this case, since the workbench is a roughly rectangular flat plate and has four wheels (casters) attached to leg members fixed to each of the four corners of the workbench, if the size of the workbench is set large, there is a risk that it will be impossible to pass through a narrow entrance to the construction site. This means that construction work using the work equipment can only be carried out at construction sites where the entrance can be passed through, limiting the use of the work equipment.

[0007] The present invention has been made in consideration of the above points, and its purpose is to provide a work device that allows passage through narrow entrances to a construction site and can be used without restricting construction work at the construction site. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides a working device used when performing construction work on a work object near a ceiling, the working device comprising a substantially rectangular frame-shaped peripheral wall having two sets of opposing wall surfaces, four wheels provided at the lower ends of the four corners of the peripheral wall so as to be able to roll freely, and a work platform detachably attached to the peripheral wall and capable of carrying multiple workers. Furthermore, when the work platform is removed, one set of the wall surfaces is divided into multiple segments between the remaining other set of wall surfaces, and each of the segments is configured to be foldable around multiple axes extending in the vertical direction.

[0009] It is also preferable that at least two adjacent wheels among the wheels are provided with electric motors that can be braked and rotate forward and backward.

[0010] It is also preferable that each of the electric motors is individually remotely controlled by a portable remote control.

[0011] Furthermore, at least one of the first set of wall surfaces and the second set of wall surfaces may be provided with a height raising means for raising the height of each of the wall surfaces in accordance with the height of the work table.The height raising means may be provided with a plurality of upper wall surfaces that are detachably stacked from above on at least one of the first set of wall surfaces and the second set of wall surfaces.

[0012] The object to be worked on may be mounted on each of the upper wall surfaces. [Effects of the Invention]

[0013] In summary, when the workbench is removed from the peripheral walls, one set of walls can be folded around multiple axes extending vertically by the multiple divided pieces between the other set of walls, and the length between the other set of walls is shortened by folding the divided pieces of one set of walls together. This makes it possible to pass through narrow entrances to the construction site, and the work equipment can be used without restricting construction work at the construction site.

[0014] In addition, at least two adjacent wheels among the wheels are provided with electric motors that can be braked and rotate forward and backward. Therefore, when steering the working implement, by braking the electric motor of the wheel on the inside of the steering direction and driving the electric motor of the wheel on the outside of the steering direction, the working implement can be freely rotated around the wheel on the inside of the steering direction as a fulcrum, making steering easier than when steering by turning a steering wheel.

[0015] Furthermore, by remotely operating each electric motor individually using a remote control on a portable operating device, a worker on the workbench or on the floor can freely control each electric motor by remotely operating the remote control switch.

[0016] Furthermore, by raising the height of each wall surface by stacking the upper wall surfaces from above according to the height of the workbench, the safety of the worker is ensured even when the workbench is high, and workability can be improved.

[0017] In addition, by mounting the construction objects on each upper wall, there is no need to load the construction objects, such as ceiling panels and lighting fixtures, each time construction work is performed, thereby improving the efficiency of construction work. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view of a working device according to a first embodiment of the present invention in a state where the working device is unfolded and a work table is attached to an upper position. [Figure 2] 2 is a right side view of the working device of FIG. 1 as viewed from the right side. [Figure 3] 2 is a rear view of the working device of FIG. 1 as seen from the rear side. [Figure 4] 2 is a plan view of the working device of FIG. 1 as viewed from above. [Figure 5] 2 is a perspective view of the working apparatus of FIG. 1 in a working state with two workers on board. FIG. [Figure 6] FIG. 2 is a perspective view of the working device of FIG. 1 with a work table attached at the middle position. [Figure 7] 7 is a right side view of the working device of FIG. 6 as viewed from the right side. [Figure 8] 7 is a rear view of the working device of FIG. 6 as seen from the rear side. [Figure 9] 2 is a perspective view of the working device of FIG. 1 with a work table attached to a lower position thereof. FIG. [Figure 10] 10 is a right side view of the working device of FIG. 9 as viewed from the right side. [Figure 11] 10 is a rear view of the working device of FIG. 9 as seen from the rear side. [Figure 12] 2 is a perspective view schematically showing upper and lower horizontal frames of the working device of FIG. 1. FIG. [Figure 13] 13 is a plan view of each horizontal frame of FIG. 12 as viewed from above. [Figure 14]13 is a side view of each horizontal frame of FIG. 12 as viewed from the side. [Figure 15] 13 is a plan view of the state in which the horizontal frames of FIG. 12 have begun to be folded. [Figure 16] FIG. 2 is a perspective view of the working device of FIG. 1 in a folded state. [Figure 17] 17 is a right side view of the working device of FIG. 16 as viewed from the right side. [Figure 18] FIG. 17 is a rear view of the working device of FIG. 16 as seen from the rear side. [Figure 19] FIG. 17 is a plan view of the working device of FIG. 16 as viewed from above. [Figure 20] 13 is a plan view of the horizontal frames of FIG. 12 in a folded state. [Figure 21] FIG. 10 is a perspective view showing a working state in which two workers are riding on a work platform in which a working device according to a second embodiment of the present invention is unfolded and attached at an upper stage position. [Figure 22] 22 is a right side view of the working device of FIG. 21 as viewed from the right side. [Figure 23] FIG. 22 is a front view of the working device of FIG. 21 as seen from the front side. [Figure 24] 22 is a rear view of the working device of FIG. 21 as seen from the rear side. [Figure 25] 22 is a plan view of the working device of FIG. 21 as seen from above. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0020] Fig. 1 shows a perspective view of a working apparatus according to a first embodiment of the present invention in an unfolded state with a work table attached to the upper stage position. Fig. 2 shows a right side view of the working apparatus in Fig. 1 as seen from the right side, Fig. 3 shows a rear view of the working apparatus in Fig. 1 as seen from the rear side, and Fig. 4 shows a plan view of the working apparatus in Fig. 1 as seen from above.

[0021] As shown in Figures 1 to 4, reference numeral 1 denotes a work device used when performing work on a ceiling panel P, which is an object to be worked on, near a ceiling. This work device 1 has a peripheral wall 2 in the shape of a substantially rectangular frame, which has two sets of opposing wall surfaces 21 to 24. One set of wall surfaces 21, 22 of this peripheral wall 2 comprises left and right wall surfaces 21, 22 that face each other laterally. Meanwhile, the other set of wall surfaces 23, 24 of the peripheral wall 2 comprises front and rear wall surfaces 23, 24 that face each other longitudinally.

[0022] Front and rear angular frames 25, 25 extending in the left-right direction are provided at the lower ends of the four corners of the peripheral wall 2. Circular tubular supports 26-29 extending vertically upward are provided on the left and right ends of each of these angular frames 25. Furthermore, protrusions 30, 30 are provided on the left and right ends of each of the angular frames 25, respectively, which protrude horizontally diagonally outward (diagonally forward or diagonally backward) at an angle of approximately 135° with respect to the axis of each of the angular frames 25, and front, rear, left and right wheels FL, FR, RL, RR are respectively provided on the underside of each of these protrusions 30 so as to be able to roll freely.

[0023] The tip of each protrusion 30 and the lower end of each support pillar 26 to 29 are reinforced by diagonal members 36 that diagonally connect the two pillars 30, 26 to 29. In this case, the left and right front support pillars 26, 27 and rear support pillars 28, 29 that extend vertically from the four corners of the peripheral wall 2 are used as the pillars 26 to 29.

[0024] The rear wall surface 24 is provided, in order from top to bottom, with five cylindrical rear horizontal frames 31 to 35 that extend in the left-right direction to connect the left and right rear support columns 28, 29. The front wall surface 23 is provided, in order from top to bottom, with six cylindrical front horizontal frames 41 to 46 that extend in the left-right direction to connect the left and right front support columns 26, 27.

[0025] The left side wall 21 is provided with upper and lower horizontal frames 47, 48 that extend in the front-to-rear direction on both the upper and lower sides of the left side between the front and rear support columns 26, 28, and four cylindrical vertical frames 49, 49, ... that extend in the vertical direction between the left front and rear support columns 26, 28. Both upper and lower ends of each vertical frame 49 of the left side wall 21 are connected to the upper and lower horizontal frames 47, 48, respectively.

[0026] The right side wall 22 also includes upper and lower horizontal frames 47, 48 extending in the front-to-rear direction on both the upper and lower sides of the right front and rear support columns 27, 29, and four cylindrical vertical frames 49, 49, ... extending in the vertical direction on both the upper and lower sides of the right front and rear support columns 27, 29. Both upper and lower ends of each vertical frame 49 of the right side wall 22 are also connected to the upper and lower horizontal frames 47, 48, respectively.

[0027] Figure 5 shows a perspective view of the working apparatus 1 of Figure 1 in a working state with two workers on board. As shown in Figure 5, the working apparatus 1 is equipped with a work platform 7 on which two workers S, S can sit. The work platform 7 is equipped with two end corner frames 71, 71 that are shaped like a generally rectangular frame in cross section and extend in the front-to-rear direction on both left and right ends, and a flat panel board 72 whose left and right ends are fixed to each of the end corner frames 71. The panel board 72 is formed in a generally rectangular shape in a plan view so as to fit along the inside of the peripheral wall 2.

[0028] Furthermore, substantially U-shaped notches 73, 73 are provided at the front and rear ends of each end corner frame 71, which are detachably fitted from above to each of the rear horizontal frames 31 to 35 and each of the front horizontal frames 41 to 46. In this case, a large number of ceiling panels P, P, ... can be mounted on the workbench 7 with two workers S, S on board.

[0029] The components of the work equipment 1, namely, each corner frame 25, each support pillar 26-29, each rear horizontal frame 31-35, each front horizontal frame 41-46, upper and lower horizontal frames 47, 48, each vertical frame 49, and work platform 7 (corner frames 71 at both ends and panel board 72), are each formed from aluminum alloy, and the total weight is kept to approximately 93 kg.

[0030] Fig. 6 is a perspective view of the working apparatus 1 in Fig. 1 with the work table 7 attached in the middle position, Fig. 7 is a right side view of the working apparatus 1 in Fig. 6 as viewed from the right side, and Fig. 8 is a rear view of the working apparatus 1 in Fig. 6 as viewed from the rear side. Also, Fig. 9 is a perspective view of the working apparatus 1 in Fig. 1 with the work table 7 attached in the lower position, Fig. 10 is a right side view of the working apparatus 1 in Fig. 9 as viewed from the right side, and Fig. 11 is a rear view of the working apparatus 1 in Fig. 9 as viewed from the rear side.

[0031] As shown in Figures 6 to 11, the front and rear cutout holes 73, 73 of each end corner frame 71 are fitted into the first rear horizontal frame 31 from the top of the rear horizontal frames 31 to 35 and the third front horizontal frame 43 from the top of the front horizontal frames 41 to 46, thereby maintaining the workbench 7 in an approximately horizontal position at the highest upper level (the position shown in Figures 1 to 5).

[0032] The front and rear cutout holes 73, 73 of each of the end corner frames 71 are fitted into the third rear cross frame 33 from the top among the rear cross frames 31 to 35 and the fifth front cross frame 45 from the top among the front cross frames 41 to 46, thereby maintaining the workbench 7 in a substantially horizontal state at the central, lowest position (the position shown in FIGS. 9 to 11). Furthermore, the front and rear cutout holes 73, 73 of each of the end corner frames 71 are fitted into the second rear cross frame 32 from the top among the rear cross frames 31 to 35 and the fourth front cross frame 44 from the top among the front cross frames 41 to 46, thereby maintaining the workbench 7 in a substantially horizontal state at the central intermediate position (the position shown in FIGS. 6 to 8).

[0033] That is, the workbench 7 can be adjusted to three different heights in accordance with the height of work near the ceiling by adjusting the fitting positions of the front and rear cutout holes 73, 73 of each of the end corner frames 71 with respect to the first to third rear horizontal frames 31-33 from the top among the rear horizontal frames 31-35 and the third to fifth front horizontal frames 43-45 from the top among the front horizontal frames 41-46. In this case, the workbench 7 is set to a height of 120 cm from the floor surface U at the lowest of the three positions (position shown in FIGS. 9 to 11), a height of 150 cm from the floor surface U at the central position (position shown in FIGS. 6 to 8), and a height of 180 cm from the floor surface U at the highest position (position shown in FIGS. 1 to 5).

[0034] A pair of left and right doors 66, 66 that open rearward (toward the work platform 7) via upper and lower hinges 65, 65 are provided above each of the rear horizontal frames 31-35, i.e., at the upper end of the front wall 23. Each door 66 is made of an aluminum alloy and, when closed, abuts against the left and right front support columns 26, 27, respectively, to be held in the closed position (the position shown in FIGS. 1 to 13). The worker S boards the work platform 7 by climbing up and down the rear horizontal frames 31-35 of the front wall 23 in order from the bottom. A ladder may be leaned against the upper rear horizontal frame 31 (or 32) of the front wall 23, which allows the worker S to board the work platform 7 more smoothly.

[0035] Furthermore, each of the rear horizontal frames 31 located first from the top of the front wall surface 23 is connected to the left and right front support columns 26, 27 at only the left and right ends, with the majority of the remaining central portion removed, allowing the worker S to smoothly board the work platform 7 in the middle and lower positions. When the work platform 7 is held in the highest upper position, the front and rear cutout holes 73, 73 of each of the end corner frames 71 fit into the left and right ends of the uppermost rear horizontal frame 31. In this case, the working device 1 is set so that the length between the front and rear support columns 26, 28 (width) is 1500 mm, the length between the left and right front support columns 26, 27 (depth) is 1200 mm, and the length from the floor surface U to the tip of each support column 26-29 (height) is 2500 mm.

[0036] The left side wall 21 is divided into four first to fourth segments 51 to 54 in order from the front side between the left front and rear support columns 26, 28. Meanwhile, the right side wall 22 is also divided into four first to fourth segments 51 to 54 in order from the front side between the right front and rear support columns 27, 29. Furthermore, the horizontal frames 47, 48 on both the top and bottom sides of the left and right side wall surfaces 21, 22 are divided into four pieces according to the segments 51 to 54.

[0037] Fig. 12 is a perspective view showing the upper and lower horizontal frames 47, 48 of the working apparatus 1 in Fig. 1, Fig. 13 is a plan view of the horizontal frames 47, 48 in Fig. 12 as seen from above, and Fig. 14 is a side view of the horizontal frames 47, 48 in Fig. 12 as seen from the side. Furthermore, Fig. 15 is a plan view of the horizontal frames 47, 48 in Fig. 12 as they begin to fold.

[0038] 12 to 14, among the segments 51 to 54 that divide the upper and lower horizontal frames 47, 48, adjacent first and second segments 51, 52 (second and third segments 52, 53 or third and fourth segments 53, 54) are connected to each other via first hinges 55, and are connected to each other so as to be rotatable about vertical axes 56. For ease of explanation, the vertical axes 56 are not shown in FIGS. 1 to 11, but are shown in FIGS. 12 to 15.

[0039] Each first hinge 55 has a bottom that is integrally formed on one of the opposing end faces of adjacent segments of each horizontal frame 47, 48, and protrudes away from the upper and lower ends of the bottom toward the other, with the inner hinge pieces 57 having a generally U-shaped cross section and facing surfaces that face each other vertically at the upper and lower protruding portions. Also, each first hinge 55 has a bottom that is integrally formed on the other of the opposing end faces of adjacent segments of each horizontal frame 47, 48, and protrudes away from the upper and lower ends of the bottom toward the other, with the outer hinge pieces 58 having a generally U-shaped cross section and facing surfaces that face each other vertically at the upper and lower protruding portions.

[0040] The bottom of the inner hinge piece 57 is integrally formed on the dividing end surface (rear end surface) of the first segment 51 with the second segment 52 of the upper and lower horizontal frames 47, 48, the dividing end surface (rear end surface) of the second segment 52 with the third segment 53, and the dividing end surface (rear end surface) of the third segment 53 with the fourth segment 54.

[0041] On the other hand, the bottom of the outer hinge piece 58 is provided integrally with the division end face (front end face) of the second divided piece 52 with the first divided piece 51 of the upper and lower horizontal frames 47, 48, the division end face (front end face) of the third divided piece 53 with the second divided piece 52, and the division end face (front end face) of the fourth divided piece 54 with the third divided piece 53. The distance between the upper and lower opposing surfaces of the outer hinge piece 58 of each first hinge 55 is set wider than the distance between the upper and lower opposing surfaces of the inner hinge piece 57 of each first hinge 55 so that the inner hinge piece 57 of each first hinge 55 can slide around the vertical axis 56 between the upper and lower opposing surfaces inside the outer hinge piece 58 with a margin.

[0042] The first and fourth segments 51, 54 of the upper and lower horizontal frames 47, 48 are rotatably supported by the left front and rear support columns 26, 28 and the right front and rear support columns 27, 29 via second hinges 61, respectively. Each second hinge 61 has a hinge piece 63 with a generally U-shaped cross section and opposing surfaces that face each other vertically, with the bottom of the second hinge 61 fixed to the left and right front support columns 26, 27 and rear support columns 28, 29. The front ends (ends opposite the first hinge 55) of the first segments 51 of each horizontal frame 47, 48 and the rear ends (ends opposite the first hinge 55) of the fourth segments 54 of each horizontal frame 47, 48 are inserted between the opposing upper and lower surfaces of each hinge piece 63.

[0043] A vertical shaft 62 that passes through the front end of each first divided piece 51 of each horizontal frame 47, 48 and the rear end of each fourth divided piece 54 of each horizontal frame 47, 48 is inserted between the upper and lower opposing surfaces of the hinge piece 63 of each second hinge 61. Each first divided piece 51 of each horizontal frame 47, 48 is supported rotatably about the vertical shaft 62 relative to the left and right front support columns 26, 27, and each fourth divided piece 54 of each horizontal frame 47, 48 is supported rotatably about the vertical shaft 62 relative to the left and right rear support columns 28, 29.

[0044] Furthermore, upward-standing, torii-shaped wall members 64, 64, ... are integrally provided on the upper ends of the divided pieces 51 to 54 of the upper horizontal frame 47. In this case, each wall member 64 is also formed from an aluminum alloy, and the height of the upper end of each wall member 64 is approximately the same as the height of the upper ends of the pillars 26 to 29. For ease of explanation, each wall member 64 is not shown in Fig. 4, but is shown in Figs. 1 to 3 and 5 to 10.

[0045] 15, the vertical shaft 56 of each first hinge 55 is inserted into one of insertion holes 59, 59 that open at both inner and outer ends of the upper and lower opposing surfaces of the inner hinge piece 57 and the outer hinge piece 58. Specifically, the vertical shafts 56, 56 of the adjacent first and second divided pieces 51, 52 and the adjacent third and fourth divided pieces 53, 54 of each horizontal frame 47, 48 are inserted into the insertion holes 59 at the outer ends of the upper and lower opposing surfaces of the inner and outer hinge pieces 57, 58 of each first hinge 55, and rotate in a direction such that their outer surfaces approach each other.

[0046] In addition, the adjacent second and third segments 52, 53 of each horizontal frame 47, 48 have a vertical shaft 56 inserted through an insertion hole 59 at the inner end of each of the upper and lower opposing surfaces of the inner and outer hinge pieces 57, 58 of each first hinge 55, and rotate in a direction in which their inner surfaces approach each other. Reference numeral 60 denotes a restricting pin inserted through one of the insertion holes 59 at both inner and outer ends of the upper and lower opposing surfaces of the inner and outer hinge pieces 57, 58 of each first hinge 55, the other of which is inserted through the vertical shaft 56. This restricting pin 60 restricts the rotation of each segment 51-54 about the vertical shaft 59 when the working device 1 is in operation (deployed). When folding each segment 51-54, all of the restricting pins 60 must be removed from the insertion holes 59.

[0047] Fig. 16 is a perspective view of the working apparatus 1 in Fig. 1 in a folded state, and Fig. 17 is a right side view of the working apparatus 1 in Fig. 16 as viewed from the right side. Fig. 18 is a rear view of the working apparatus 1 in Fig. 16 as viewed from the rear side, and Fig. 19 is a plan view of the working apparatus 1 in Fig. 16 as viewed from above. For ease of explanation, door 66 is not shown and has been omitted in Figs. 16 to 19.

[0048] 16 to 19, adjacent first and second segments 51, 52 and third and fourth segments 53, 54 have a vertical shaft 56 inserted through the outer ends of the opposing surfaces of the hinge pieces 57 of each first hinge 55, and rotate in a direction in which their outer surfaces approach each other. Also, adjacent second and third segments 52, 53 have a vertical shaft 56 inserted through the inner ends of the opposing surfaces of the hinge pieces 57 of each first hinge 55, and rotate in a direction in which their inner surfaces approach each other. The left and right wall surfaces 21, 22 are folded as the first and second hinges 55, 61 of each segment 51-54 rotate about their respective vertical shafts 56, 62, and the lengths between the left front and rear support columns 26, 28 and the right front and rear support columns 27, 29 of the working device 1 are shortened to 250 mm.

[0049] The first to fourth segments 51 to 54 of the left and right side walls 21 and 22 are folded around the vertical axes 56 and 62 of the first and second hinges 55 and 61 and are bound and restrained by belts 67. Fig. 20 shows a plan view of the horizontal frames 47 and 48 in Fig. 12 in a folded state. As shown in Fig. 20, when the first to fourth segments 51 to 54 are folded, restriction pins 60 are inserted into insertion holes 59 at the outer ends of the upper and lower opposing surfaces of the inner and outer hinge segments 57 and 58 of the first hinges 55 between the front end of the second segment 52 and the rear end of the third segment 53, which overlap each other, in the upper and lower horizontal frames 47 and 48, thereby restricting the rotation of each segment 51 to 54 around the vertical axis 56.

[0050] Of the front, left, and right wheels FL, FR, RL, and RR, electric motors 81, 81 are provided on the front left and right wheels FL, FR to rotate the wheels FL, FR in both forward and reverse directions. Each electric motor 81 has a pinion gear fixed to its output shaft meshed with a reduction gear of a reducer 84, reducing the rotation of the output shaft and transmitting it to the front left and right wheels FL, FR. Each electric motor 81 can brake the front left and right wheels FL, FR individually by stopping the rotation of its respective output shaft.

[0051] Each electric motor 81 is remotely controlled for its individual forward / reverse rotation drive operation and braking operation by remote control switches 83 on a portable operating device 82. The operating range of each electric motor 81 using the operating device 82 is approximately 800 m, and operation is possible from the workbench 7 or the floor U. The operating device 82 is stored in a storage box 40 attached to the left end of the first front horizontal frame 41 from the top of the front wall 23.

[0052] Therefore, in this embodiment, when the workbench 7 is removed from the peripheral wall 2, the opposing left and right side wall surfaces 21, 22 are configured to be foldable around the vertical axes 56, 62 of the first and second hinges 55, 61, respectively, by the first to fourth divided pieces 51 to 54 that are divided into four between the front and rear wall surfaces 23, 24 of the other side.

[0053] Therefore, the distance between the front and rear wall surfaces 23, 24, i.e., the distance between the front and rear support columns 26, 28 (or 27, 29), is shortened from 1500 mm to 250 mm by folding the segments 51-54 of the left and right wall surfaces 21, 22. This makes it possible to pass through a narrow entrance (for example, about 700 mm wide) to the construction site, and the working device 1 can be used without any restrictions on construction work at the construction site.

[0054] Furthermore, the front left and right wheels FL, FR of the front, left, and right wheels FL, FR, RL, and RR are each provided with an electric motor 81 that can be braked and rotates forward and backward. Therefore, when steering the working implement 1, by braking the electric motor 81 of the wheel FL (or FR) on the inside of the steering direction and rotating the electric motor 81 of the wheel FR (or FL) on the outside of the steering direction forward and backward, the working implement 1 can be freely rotated with the wheel FL on the inside of the steering direction as a fulcrum, making steering easier than when steering by turning a steering wheel.

[0055] Furthermore, each electric motor 81 is remotely operated individually by each remote control switch 83 of the operating device 82, so that a worker S on the workbench 7 or a worker on the floor U can freely control the left and right electric motors 81, 81 by remotely operating each remote control switch 83.

[0056] In addition, since a large number of ceiling panels P, P, ... are mounted on the workbench 7, there is no need to load the ceiling panel P onto the workbench 7 each time construction work on the ceiling panel P is performed, thereby improving the efficiency of the construction work.

[0057] In addition, the first to fourth divided pieces 51 to 54 of the left and right wall surfaces 21, 22 are folded and tied down with belts 67, making it easier to pass through narrow entrances to the construction site.

[0058] Next, a second embodiment of the present invention will be described with reference to FIGS.

[0059] In this embodiment, the configuration of the peripheral wall is changed. Note that the configuration other than the peripheral wall is the same as in the first embodiment, and the same parts are denoted by the same reference numerals and detailed description thereof will be omitted.

[0060] Fig. 21 shows a perspective view of a working state in which a working apparatus according to a second embodiment of the present invention is unfolded and attached to the upper stage position with two workers riding on the work platform. Fig. 22 shows a right side view of the working apparatus in Fig. 21 as seen from the right side, and Fig. 23 shows a front view of the working apparatus in Fig. 21 as seen from the front side. Fig. 24 shows a rear view of the working apparatus in Fig. 21 as seen from the rear side, and Fig. 25 shows a plan view of the working apparatus in Fig. 21 as seen from above.

[0061] As shown in Figures 21 to 25, the left and right side wall surfaces 21, 22 and the front wall surface 23 of the peripheral wall 2 are provided with a height-raising means 9 that raises the height of the left and right side wall surfaces 21, 22 and the front wall surface 23 of the peripheral wall 2 depending on the height of the workbench 7, for example, when the workbench 7 is held in the highest upper position or the central middle position.

[0062] The raising means 9 is composed of three upper wall surfaces 91-93 that are detachably stacked from above on the left and right wall surfaces 21, 22 and the front wall surface 23 of the peripheral wall 2, respectively, and has a generally U-shape that opens rearward in plan view. That is, the raising means 9 includes a left upper wall surface 91, a right upper wall surface 92, and a front upper wall surface 93 that correspond to the left and right wall surfaces 21, 22 and the front wall surface 23, respectively. In this case, each of the upper wall surfaces 91-93 is formed in a generally U-shape that opens downward.

[0063] Support column caps 94, 94 are provided on both front and rear ends of the left upper wall surface 91. The support column caps 94, 94 are inserted from above onto the upper ends of the left front and rear support columns 26, 28. The right upper wall surface 92 is also provided on both front and rear ends of the right upper wall surface 92. The support column caps 94, 94 are inserted from above onto the upper ends of the right front and rear support columns 27, 29.

[0064] The left and right ends of the front upper wall 93 are fixed to support caps 94, 94 at the front ends of the left and right upper wall 91, 92. A vertical lattice 95 is attached to the top of each of the upper wall 91 to 93 to ensure the safety of the worker S standing on the work platform 7.

[0065] A basket 96 is detachably fastened from the outside to the upper ends of the left and right upper wall surfaces 91, 92 extending in the front-to-rear direction at the bottom via a pair of front and rear hooks 961, 961. This basket 96 stores a plurality of ceiling panels P at the front and rear, respectively, so that the worker S on the workbench 7 can easily take them out as needed.

[0066] The front wall 23 is provided with, in order from top to bottom, five cylindrical front horizontal frames 42 to 46 that extend in the left-right direction and connect the left and right front support columns 26, 27. In this case, the topmost front horizontal frame 41' is located below the front upper wall 93 and is connected between the lower ends of the front support column caps 94, 94 of the left and right upper wall surfaces 91, 92.

[0067] Furthermore, the front horizontal frame 46 at the lowest position on the front wall surface 23 and the rear horizontal frame 35 at the lowest position on the rear wall surface 24 are positioned at the same height from the floor surface U. An installation base 97 is suspended between the front horizontal frame 46 at the lowest position on the front wall surface 23 and the rear horizontal frame 35 at the lowest position on the rear wall surface 24, and a plurality of ceiling panels P, P, ... are stacked on this installation base 97 in four positions, front, back, left and right.

[0068] Therefore, in this embodiment, when the workbench 7 is held at the highest upper position or the central middle position, the left upper wall surface 91, the right upper wall surface 92, and the front upper wall surface 93 are stacked from above on the left and right side wall surfaces 21, 22 and the front wall surface 23 of the peripheral wall 2, thereby raising the heights of the left and right side wall surfaces 21, 22 and the front wall surface 23 of the peripheral wall 2. This ensures the safety of the worker S even when the workbench 7 is high, and improves workability.

[0069] In addition, since multiple ceiling panels P, P, ... are stored in baskets 96, 96 engaged with the upper wall surfaces 91, 92 on both the left and right sides, there is no need to load the ceiling panels P each time construction work on the ceiling panels P is performed, thereby improving the efficiency of the construction work.

[0070] The present invention is not limited to the above-described embodiments, but includes various other modified examples. For example, in the present embodiment, electric motors 81 are provided only on the front left and right wheels FL and FR among the front, rear, left and right wheels FL, FR, RL and RR, respectively. However, electric motors may be provided only on the rear left and right wheels, or electric motors may be provided on all of the front, rear, left and right wheels. Furthermore, electric motors may not be provided on any of the front, rear, left and right wheels.

[0071] Furthermore, in each of the above embodiments, the working device 1 is used when performing installation work on the ceiling panel P, but the working device may also be used when performing installation work near the ceiling of an object to be installed, such as a lighting fixture or an air conditioning device.

[0072] In the above-described embodiments, the left and right side wall surfaces 21, 22 are each divided into four first to fourth segments 51 to 54 in order from the front, but the front and rear wall surfaces may be divided into a plurality of segments. Furthermore, the number of segments into which each pair of wall surfaces is divided may be any number as long as the number of segments is the same.

[0073] In addition, in each of the above embodiments, the height of the work platform 7 can be changed to 120 cm, 150 cm, or 180 cm, but the height of the work platform is not limited to this, and it goes without saying that the present invention can also be applied to work platforms with heights of approximately 210 cm or 240 cm. In that case, the height may be changed to 210 cm or 240 cm by setting three or four or more steps.

[0074] In addition, in the second embodiment, the left upper wall surface 91, the right upper wall surface 92, and the front upper wall surface 93 are stacked from above to increase the height of the left and right wall surfaces 21, 22 and the front wall surface 23 of the peripheral wall 2, but the left upper wall surface, the right upper wall surface, the front upper wall surface, and the rear upper side wall may also be stacked from above to increase the height of all the wall surfaces of the peripheral wall 2. [Explanation of symbols]

[0075] 1 Work equipment 2 Wall 21 Left wall (one of the pair of walls) 22 Right wall (one pair of walls) 23 Front wall (the other pair of walls) 24 Rear wall (the other pair of walls) 51 1st division piece 52 Second division piece 53 Third division piece 54 4th division piece 56 Vertical axis (axis) of the first hinge 62 Vertical axis (axis) of the second hinge 7 Workbench 81 Electric motor 82 Control device 9 Raising means 91 Upper left wall (upper wall) 92 Right upper wall (upper wall) 93 Front upper wall (upper wall) FL,FR,RL,RR wheel P Patio パネル (construction object) S Operator

Claims

1. A work device used when performing construction work on a work object near a ceiling, A substantially rectangular frame-shaped peripheral wall having two pairs of wall surfaces facing each other; Four wheels are provided at the lower ends of the four corners of the peripheral wall so as to be able to roll freely, A work platform that is detachably attached to the peripheral wall and on which a plurality of workers can ride; Equipped with A working device characterized in that, when the work table is removed, one pair of the wall surfaces is divided into a plurality of segments between the remaining other pair of wall surfaces, and each of the segments is configured to be foldable around a plurality of axes extending in the vertical direction.

2. 2. The working device according to claim 1, wherein at least two adjacent wheels among said wheels are provided with electric motors which can be braked and can rotate forward and backward.

3. 3. The working device according to claim 2, wherein each of the electric motors is individually remotely controlled by a remote control of a portable operating device.

4. a height raising means is provided on at least one of the pair of wall surfaces and the remaining pair of wall surfaces, the height of each of the wall surfaces being raised in accordance with the height of the workbench; The working device according to any one of claims 1 to 3, wherein the raising means includes a plurality of upper wall surfaces that are stacked from above and detachably attached to at least one of the first set of wall surfaces and the remaining second set of wall surfaces.

5. The work device according to claim 4 , wherein the work target is mounted on each of the upper wall surfaces.

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