Lifting platform workbench

Abstract

To provide a height-variable work bench for a lifting platform apparatus without detaching a handrail.SOLUTION: A work bench 4 for a lifting platform apparatus 1 includes a plurality of handrails surrounding a periphery of a work floor 6. The plurality of handrails include a first handrail 9 and a second handrail 10 mutually rotatable between a storage state in which the handrails are folded on the work floor 6 and a use state in which the handrails are almost vertically raised with respect to the work floor 6 and the handrails are raised in the longitudinal direction of the work floor 6 in the use state, and a third handrail 8 in at least one of short side directions Y of the work floor 6. In the storage state, the first handrail 9 or the second handrail 10 is stored above the third handrail 8.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a work platform of a lift platform device. [Background technology]

[0002] Conventionally, handrails are provided on the periphery of the work platform of the lifting platform device (Patent Document 1). When loading the lifting platform device onto the bed of a truck, the handrails are removed from the work platform and stacked on the bottom plate to keep the height of the lifting platform device low and comply with height restrictions on roads, work areas, etc. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2008-56459 A Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, the handrail is fixed to the work floor with bolts and nuts, and in order to store the handrail, the bolts and nuts that secure the handrail must be released, which is a time-consuming task and there is also the risk of the bolts and nuts being lost.

[0005] SUMMARY OF THE PRESENT DISCLOSURE In order to solve the above-mentioned problems, an object of the present invention is to provide a work platform of a lifting platform device whose height can be adjusted without removing the handrails. [Means for solving the problem]

[0006] The present invention as described in claim 1 is a work platform of a lifting platform device having a plurality of handrails surrounding a periphery of a work platform, A door is provided for opening and closing the entrance to the workbench, The plurality of handrails are 、 A storage state in which the device is folded onto the work floor, and a usage state in which the device is erected substantially perpendicular to the work floor. 、and The plurality of handrails include A first handrail that is erected in the longitudinal direction of the work floor in the use state. and Second handrail and At least one of the short sides of the work floor To be erected A third handrail is provided, and in the stored state, the first handrail is provided above the third handrail. and Store the second handrail A girder-side baseboard is provided at the lower ends of the first handrail and the second handrail, and the door includes a door body and a door-side baseboard that can move up and down relative to the door body, the door-side baseboard is fixed at a position higher than the girder-side baseboard, and the door body and the door-side baseboard can be folded together with the second handrail. The present invention is characterized by the above.

[0007] The present invention according to claim 2 ,before The third handrail is characterized in that it is stored in a space formed between the opposing girder side baseboards.

[0008] The present invention described in claim 3 is characterized in that the multiple handrails include a fourth handrail in the short side direction of the work floor opposite the third handrail, and the fourth handrail is rotatably attached to either the first handrail or the second handrail, and can be folded up in a state overlapping either the first handrail or the second handrail in the stored state.

[0009] The present invention described in claim 4 is characterized in that the third handrail and the fourth handrail have end baseboards at their lower ends, and when in the stored state, part or all of the end baseboard is upright, and the first handrail and the second handrail are supported by the girder side baseboard when in the stored state. Effect of the Invention

[0010] According to the work platform of the lifting platform device of the present invention, the handrails can be folded onto the work platform without removing them from the work platform, making it easy to lower the height of the work platform. [Brief description of the drawings]

[0011] [Figure 1] 1 is a side view of a lift platform device in use with a handrail erected, showing a first embodiment of the present invention. [Diagram 2] FIG. 13 is a perspective view of the workbench in use with the handrails raised. [Diagram 3] FIG. 2 is a perspective view of the workbench in a stored state with the handrails folded up. [Figure 4] FIG. 2 is a front view of the workbench in a stored state with the handrails folded up. [Diagram 5] FIG. 11 is a rear view of the workbench in the stored state with the handrails folded up. [Figure 6] FIG. 2 is a left side view of the workbench in a stored state with the handrails folded up. [Figure 7] FIG. 3 is a perspective view of the workbench in a state in which the rear handrail is folded down from the state shown in FIG. 2. [Figure 8] FIG. 8 is a perspective view of the workbench in a state in which a part of the rear handrail is folded onto the left handrail from the state shown in FIG. 7. [Figure 9] FIG. 8 is a perspective view of the workbench in the state where the door-side baseboard is raised from the state shown in FIG. 7. [Figure 10] FIG. 10 is a perspective view of the workbench in the state shown in FIG. 9 with the door body and part of the rear handrail folded onto the left handrail. [Figure 11] FIG. 10 is a perspective view of the workbench in the state shown in FIG. 9 with the front handrail folded onto the right handrail. [Figure 12] FIG. 11 is a perspective view of the workbench with the left handrail folded down from the state shown in FIG. 10. [Figure 13] FIG. 11 is a side view showing the state in which the lift platform device is loaded onto a truck with the handrails folded and stored. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Preferred embodiments of the present invention will be described with reference to the accompanying drawings. Note that the embodiments described below do not limit the contents of the present invention described in the claims. Also, not all of the configurations described below are necessarily essential requirements of the present invention. EXAMPLES

[0013] In this embodiment, reference numeral 1 denotes a lifting platform device, which includes a cart body 2, wheels 3 for traveling, a work platform 4 on which a worker sits, a link mechanism 5 that supports the work platform 4, and a hydraulic cylinder (not shown) as a lifting device for raising and lowering the link mechanism 5. In Figs. 2, 3, and 7 to 12, the longitudinal direction of the work platform 4 is the X direction, and the lateral direction is the Y direction. The near side in the X direction is the front side of the work platform 4, and the far side in the X direction is the rear side of the work platform 4. The near side in the Y direction is the left side of the work platform 4, and the far side in the Y direction is the right side of the work platform 4.

[0014] The workbench 4 comprises a rectangular work floor 6 and a front handrail 7, a rear handrail 8, a left handrail 9, and a right handrail 10 which are erected so as to surround the periphery of the work floor 6.

[0015] A right front end column 11, a left front end column 12, a right rear end column 13, and a left rear end column 14 are erected at the four corners of the work floor 6. A front baseboard 15, a rear baseboard 16, a right baseboard 17, and a left baseboard 18 are erected at the front end 6A, the rear end 6B, the right end 6C, and the left end 6D of the work floor 6, respectively. Each baseboard 15-18 is firmly fixed to the work floor 6 by fixing with bolts and nuts, welding, or the like. The front baseboard 15 and the rear baseboard 16 are gable side baseboards provided on the gable side, which is the short direction Y of the work floor 6, and the right baseboard 17 and the left baseboard 18 are girder side baseboards provided on the girder side, which is the long direction X of the work floor 6.

[0016] The front baseboard 15 is erected so as to cover only the right side of the front end 6A of the work floor 6, and an opening formed on the left side of the front end 6A of the work floor 6 that is not covered by the front baseboard 15 serves as an entrance 19 to the work floor. The right end of the front baseboard 15 is supported by the right front end column 11, and the left end of the front baseboard 15 is supported by the front support column 20 that defines the aforementioned entrance 19 together with the left front end column 12. The left and right ends of the rear baseboard 16 are supported by the right rear end column 13 and the left rear end column 14. The front and rear ends of the right baseboard 17 are supported by the right front end column 11 and the right rear end column 13. The front and rear ends of the left baseboard 18 are supported by the left front end column 12 and the left rear end column 14.

[0017] The front end of the right baseboard 17 is provided with a right front extension 21 formed by extending upward from the upper end of the right front post 11. The rear end of the right baseboard 17 is provided with a right rear extension 22 formed by extending upward from the upper end of the right rear post 13. The front end of the left baseboard 18 is provided with a left front extension 23 formed by extending upward from the upper end of the left front post 12. The rear end of the left baseboard 18 is provided with a left rear extension 24 formed by extending upward from the upper end of the left rear post 14.

[0018] Here, the right front extension 21 and the left front extension 23 are made of pipe material with a U-shaped cross section arranged so that their opening directions face each other. Similarly, the right rear extension 22 and the left rear extension 24 are made of pipe material with a U-shaped cross section arranged so that their opening directions face each other.

[0019] The upper parts of the right front extension 21 and the right rear extension 22 are provided with a right front axle 25 and a right rear axle 26 that pivotally support the lower part of the right handrail 10 in the vertical direction toward the left. Similarly, the upper parts of the left front extension 23 and the left rear extension 24 are provided with a left front axle 27 and a left rear axle 28 that pivotally support the lower part of the left handrail 9 in the vertical direction toward the right. The right front extension 21 and the right rear extension 22 are formed to have the same length, and the left front extension 23 and the left rear extension 24 are also formed to have the same length. Since the right front extension 21 and the right rear extension 22 are formed to be longer than the left front extension 23 and the left rear extension 24, the right front axle 25 and the right rear axle 26 are positioned higher than the left front axle 27 and the left rear axle 28.

[0020] The right handrail 10 includes a pair of right front vertical members 29 and right rear vertical members 30, a right upper cross member 31 connecting the upper end of the right front vertical member 29 to the upper end of the right rear vertical member 30, a right lower cross member 32 connecting the middle section of the right front vertical member 29 to the middle section of the right rear vertical member 30, and a reinforcing member 33 installed between the right upper cross member 31 and the right lower cross member 32. Here, the right front axle 25 supports the lower part of the right front vertical member 29, and the right rear axle 26 supports the lower part of the right rear vertical member 30. Here, as shown in FIG. 2, the dimension d1 from the upper end portion of the right front vertical member 29 and the right rear vertical member 30 to the right front axle 25 and the right rear axle 26 is set to be smaller than the dimension W in the short direction Y of the work floor 6. This allows the folded right handrail 10 to be stored in the space S. Here, the space S is defined as the space between the mutually opposing right-side baseboard 17 and left-side baseboard 18, but also includes a space S' that is an extension of the space S in parallel directly above (see Figs. 3 to 6).

[0021] In addition, the right front vertical member 29 is provided so as to be fixed in an upright state relative to the right front extension portion 21 by a right front plunger 34 provided on the right front extension portion 21. Similarly, the right rear vertical member 30 is provided so as to be fixed in an upright state relative to the right rear extension portion 22 by a right rear plunger 35 provided on the right rear extension portion 22.

[0022] The left handrail 9 has the same shape as the right handrail 10, and includes a pair of left front vertical members 36 and left rear vertical members 37, a left upper horizontal member 38 connecting the upper end of the left front vertical member 36 to the upper end of the left rear vertical member 37, a left lower horizontal member 39 connecting the middle section of the left front vertical member 36 to the middle section of the left rear vertical member 37, and a reinforcing member 40 installed between the left upper horizontal member 38 and the left lower horizontal member 39. The left front vertical member 36 and the left rear vertical member 37 are formed shorter than the right front vertical member 29 and the right rear vertical member 30. Here, the aforementioned left front axle portion 27 supports the lower part of the left front vertical member 36, and the aforementioned left rear axle portion 28 supports the lower part of the left rear vertical member 37. 2, the dimension d2 from the upper end portions of the left front vertical member 36 and the left rear vertical member 37 to the left front axle portion 27 and the left rear axle portion 28 is set to be smaller than the dimension W in the short direction Y of the work floor 6. This makes it possible for the folded left handrail 9 to be stored in the space S.

[0023] In addition, the left front vertical member 36 is provided so as to be fixed in an upright state relative to the left front extension portion 23 by a left front plunger 41 provided on the left front extension portion 23. Similarly, the left rear vertical member 37 is provided so as to be fixed in an upright state relative to the left rear extension portion 24 by a left rear plunger 42 provided on the left rear extension portion 24.

[0024] The rear handrail 8 includes a folding rear handrail body 43 and a rotating rear handrail body 44. The folding rear handrail body 43 includes a pair of rear right vertical members 45 and rear left vertical members 46, a rear upper horizontal member 47 that connects the upper end of the rear right vertical member 45 to the upper end of the rear left vertical member 46, and a rear lower horizontal member 48 that connects the middle section of the rear right vertical member 45 to the middle section of the rear left vertical member 46. A pair of left and right rear right shaft portions 49 and rear left shaft portions 50 are provided at the upper portion of the rear baseboard 16. The aforementioned rear right shaft portion 49 supports the lower portion of the rear right vertical member 45 in the vertical direction toward the front, and the aforementioned rear left shaft portion 50 supports the lower portion of the rear left vertical member 46 in the vertical direction toward the front. 2, the dimension d3 from the upper end portion of the rear right vertical member 45 and the rear left vertical member 46 to the rear right shaft portion 49 and the rear left shaft portion 50 is set to be smaller than the dimension D in the longitudinal direction X of the working floor 6. As a result, the folded rear handrail body 43 can be stored in the space S.

[0025] The right end of the rear upper cross-member 47 is fixed by an upper right rear plunger 52 to an upper right rear support member 51, which is arranged on the left side of the rear end of the upper right cross-member 31 and is made of a metal fitting with a U-shaped cross section with an opening direction facing forward. The upper right rear plunger 52 is installed on the underside of the upper right rear support member 51. Similarly, the right end of the rear lower cross-member 47 is fixed by a lower right rear plunger 54 to a right lower rear support member 53, which is arranged on the left side of the rear end of the right lower cross-member 32 and is made of a metal fitting with a U-shaped cross section with an opening direction facing forward. The lower right rear plunger 54 is installed on the underside of the lower right rear support member 53.

[0026] The left end of the rear upper horizontal member 47 is provided to be fixed by an upper left rear plunger 56 to an upper left rear support member 55, which is arranged to the right of the upper end of a rear vertical member 59 for rotation (described later) and is made of a metal fitting having a U-shaped cross section with an opening direction facing forward. The upper left rear plunger 56 is installed on the underside of the upper left rear support member 55. Similarly, the left end of the rear lower horizontal member 47 is provided to be fixed by a lower left rear plunger 58 to a lower left rear support member 57, which is arranged to the right of the middle section of the rear vertical member 59 for rotation and is made of a metal fitting having a U-shaped cross section with an opening direction facing forward. The lower left rear plunger 58 is installed on the underside of the lower left rear support member 57.

[0027] The turning rear handrail body 44 includes a turning rear vertical member 59, a turning rear upper horizontal member 60, and a turning rear lower horizontal member 61. The turning rear upper horizontal member 60 is fixed at one end to the upper end of the turning rear vertical member 59, and is pivotally supported by a rear upper left shaft portion 62 provided at the upper end of the left rear vertical member 37 so as to be rotatable from a parallel state in which the turning rear upper horizontal member 60 faces the left upper horizontal member 38 to a state in which the turning rear upper horizontal member 60 is perpendicular to the left upper horizontal member 38. The turning rear lower horizontal member 61 is fixed at one end to the middle section of the turning rear vertical member 59, and is pivotally supported by a rear lower left shaft portion 63 provided at the middle section of the left rear vertical member 37 so as to be rotatable from a parallel state in which the turning rear lower horizontal member 61 faces the left lower horizontal member 39 to a state in which the turning rear lower horizontal member 61 is perpendicular to the left lower horizontal member 39. The lower portion of the pivotable rear vertical member 59 can be fixed to the rear baseboard 16 via a rear lock pin 64 .

[0028] The front handrail 7 includes a front vertical member 66, a front upper horizontal member 67, and a front lower horizontal member 68, and is configured in the same manner as the rotating rear handrail body 44 and is installed in a symmetrical position. The front upper horizontal member 67 is fixed to the upper end of the front vertical member 66 at one end, and is pivotally supported by a front upper right shaft portion 69 provided at the upper end of the right front vertical member 29 at the other end so that the front upper horizontal member 67 can rotate freely from a parallel state in which the front upper horizontal member 67 faces the upper right horizontal member 31 to a state in which the front upper horizontal member 67 is perpendicular to the upper right horizontal member 31. The front lower horizontal member 68 is fixed to the middle section of the front vertical member 66 at one end, and is pivotally supported by a front lower right shaft portion 70 provided at the middle section of the right front vertical member 29 at the other end so that the front lower horizontal member 68 can rotate freely from a parallel state in which the front lower horizontal member 68 faces the right lower horizontal member 32 to a state in which the front lower horizontal member 68 is perpendicular to the right lower horizontal member 32. The lower portion of the front vertical member 66 can be fixed to the front baseboard 15 via a front lock pin 71.

[0029] The door 73, which opens and closes the entrance 19 to the workbench 4, comprises a door body 74 and a door-side baseboard 75. The door body 74 comprises a fixed-side vertical member 76, an open-side vertical member 77, a door-side upper horizontal member 78 connecting the upper end of the fixed-side vertical member 76 to the upper end of the open-side vertical member 77, and a door-side lower horizontal member 79 connecting the middle section of the fixed-side vertical member 76 to the middle section of the open-side vertical member 77. The fixed-side vertical member 76 is connected to the left front vertical member 36 by a door-side upper shaft portion 80 and a door-side lower shaft portion 81 provided in a pair at the top and bottom.

[0030] The door body 74 is an inward-opening door, and the door-side upper horizontal member 78 and the door-side lower horizontal member 79 are pivotally supported by the left handrail so as to move from a parallel state in which they face the left upper horizontal member 38 and the left lower horizontal member 39 to a state in which they are perpendicular to the left upper horizontal member 38 and the left lower horizontal member 39. The open-side vertical member 77 is rotatably provided at its middle with a handle 82 that also serves as a locking means that can be engaged with the front vertical member 66. Meanwhile, the fixed-side vertical member 76 and the open-side vertical member 77 are hollow tubular members, and a pair of left-side sliding vertical members 83 and right-side sliding vertical members 84 can be inserted into the interiors of the respective members. A pair of left and right sliding vertical members 83 and 84 are provided so as to be movable up and down and fixed in a raised position by a left-door lock pin 85 and a right-door lock pin 86 provided at the lower part of the fixed-side vertical member 76 and the open-side vertical member 77, respectively. The sliding vertical members 83, 84 are fixed to the through holes 87, 88 formed at the left and right ends, respectively, of the door side baseboard 75 to integrate the door main body 74 and the door side baseboard 75, and the sliding vertical members 83, 84 are raised by the lock pins 85, 86 to fix the lower end of the door side baseboard 75 at a position sufficiently higher than the upper end of the left side baseboard 18 (see FIG. 9), and the door main body 74 is folded up together with the door side baseboard 75 and the left handrail 9 (see FIG. 10).

[0031] As shown in FIG. 2, a pair of mounting brackets A1 and A2 are attached to the rear upper horizontal member 47 of the rear handrail 8 as accessories of the workbench 4. The mounting brackets A1 and A2 have hook-shaped locking parts at the top that can be locked to the rear upper horizontal member 47. A shelf A3 on which tools and various items can be placed is attached to the mounting brackets A1 and A2. A control panel A4 for various controls is attached below the shelf A3 of one of the mounting brackets A2. Another mounting bracket A5 similar to the pair of mounting brackets A1 and A2 described above is attached to the rotating rear upper horizontal member 60 of the rear handrail 8, and a push button device A6 such as an emergency stop button is attached to this mounting bracket A5. In addition, each of the cylindrical bodies B1, B2, B3, and B4 for erecting supports (not shown) for maintaining a space above the workbench 4 to protect the head of the worker from the four corners of the workbench 4 is also arranged in a position that does not interfere with the folding operation of each of the handrails 7, 8, 9, and 10.

[0032] A method for folding the handrails provided on the work platform 4 of the lifting platform device 1 configured as above will be described. From the work platform 4 in the state of FIG. 2, the handrails are folded in order starting from the lowest position of the axle. First, a method for folding the rear handrail 8, which has the lowest axle position, will be described. The upper right rear plunger 52, the lower right rear plunger 54, the upper left rear plunger 56, and the lower left rear plunger 58 are released, and the folding rear handrail body 43 is folded from the rear right axle 49 and the rear left axle 50 toward the work floor 6 with the positioning and fixing between the right handrail 10 and the rotating rear handrail body 44 released (see FIG. 7). The rear handrail 8 in this folded and stored state is stored in the space S formed between the girder side baseboards 17 and 18.

[0033] Next, a method for folding the left handrail 9, which has the second lowest shaft position after the rear handrail 8, will be described. As a step before folding the left handrail 9, the rear lock pin 64 is released and the turning rear handrail body 44 is folded inward until the turning rear upper horizontal member 60 and the turning rear lower horizontal member 61 face and are parallel to the left upper horizontal member 38 and the left lower horizontal member 39, respectively (see FIG. 8), and the door body 74 with the handle 82 opened is folded inward until the door side upper horizontal member 78 and the door side lower horizontal member 79 face and are parallel to the left upper horizontal member 38 and the left lower horizontal member 39, respectively (see FIG. 10). Next, the left front plunger 41 and the left rear plunger 42 are released, and while holding the turning rear handrail body 44 and the door body 74 together, the left handrail 9 is folded from the left front shaft portion 27 and the left rear shaft portion 28 toward the work floor 6 (see FIG. 12). 3 to 5, in the left handrail 9 folded up and stored, the left front vertical member 36 and the left rear vertical member 37 are held parallel to and spaced apart from the upper surface of the end side baseboards 15, 16 by support members 15A, 16A erected on the upper surfaces of the end side baseboards 15, 16, with a gap provided between the left front vertical member 36 and the end side baseboard 15, and also between the left rear vertical member 37 and the end side baseboard 16. These gaps prevent the worker's fingers from being pinched when folding, and prevent the left front vertical member 36 and the left rear vertical member 37 from colliding with the end side baseboards 15, 16.

[0034] Finally, a method for folding the right handrail 10, which has the highest axle position, will be described. As a step before folding the right handrail 10, the front lock pin 71 is released and the front handrail 7 is folded inward until the front upper cross member 67 and the front lower cross member 68 face and are parallel to the right upper cross member 31 and the right lower cross member 32, respectively (see FIG. 12). Next, the right front plunger 34 and the right rear plunger 35 are released, and while still holding the front handrail 7, the right handrail 10 is folded from the right front axle 25 and the right rear axle 26 toward the work floor 6 (see FIG. 3).

[0035] As described above, when the rear handrail 8, the left handrail 9, and the right handrail 10 are folded in this order, the height of the work platform 4 is lowered to the height of the right front extension 21 and the right rear extension 22, so by loading the lifting platform device 1 in this state onto the bed of a truck, the height can be kept below 2.1 meters when loaded onto the vehicle, thereby complying with the height restrictions of work areas such as roads and underground parking lots (see FIG. 13). Also, the handrails 9, 10 are stored so as to fit between the girder side baseboards 17, 18. The handrails are assembled in the reverse order to the steps in the handrail folding method described above, and the above-mentioned work platform configuration is assembled, but a description of this will be omitted here.

[0036] In this embodiment, the work platform 4 of the lifting platform device 1 is provided with a plurality of handrails surrounding the periphery of the work platform 6, and the plurality of handrails are freely rotatable between a stored state in which they are folded onto the work platform 6 and a usage state in which they are erected almost perpendicular to the work platform 6. In the usage state, a first handrail 9 and a second handrail 10 are erected in the longitudinal direction X of the work platform 6, and a third handrail 8 is provided on at least one side of the lateral direction Y of the work platform 6. In the stored state, the first handrail 9 or the second handrail 10 is stored above the third handrail 8, making it possible to fold the plurality of handrails without making them bulky.

[0037] In addition, in this embodiment, girder side baseboards 17, 18 are provided at the lower ends of the first handrail 9 and the second handrail 10, and the third handrail 8 is stored in the space S formed between the girder side baseboards 17, 18 facing each other, thereby providing a work platform 4 of the lifting platform device 1 in which each handrail 9, 10 can be stored so that it fits between the girder side baseboards 17, 18.

[0038] In addition, in this embodiment, the multiple handrails include a fourth handrail 7 in the short direction Y of the work floor 6 opposite the third handrail 8, and the fourth handrail 7 is rotatably attached to either the first handrail 9 or the second handrail 10, and in the stored state, it is foldable while overlapping either the first handrail 9 or the second handrail 10, thereby providing a work platform 4 of the lifting platform device 1 in which all of the multiple handrails can be folded.

[0039] In addition, in this embodiment, the third handrail 8 and the fourth handrail 7 have end side baseboards 15, 16 provided at their lower ends, and when in the stored state, part or all of the end side baseboards 15, 16 are in an upright position, and when in the stored state, the first handrail 9 and the second handrail 10 are supported by the girder side baseboards 17, 18. Therefore, when each of the handrails 7, 8, 9, 10 is in the stored state, the baseboards 15, 16, 17, 18 are not folded and are upright on the work floor 6, which improves the connection strength between each of the handrails 7, 8, 9, 10 and the work floor 6, and each of the assembled handrails 7, 8, 9, 10 is stably upright from the work floor 6.

[0040] As an effect of the embodiment, the work platform 4 of the lifting platform device 1 is provided with a front handrail 7, a rear handrail 8, a left handrail 9, and a right handrail 10 as multiple handrails surrounding the periphery of the work platform 6, and at least the left handrail 9 and the right handrail 10 are provided with a right front shaft 25, a right rear shaft 26, a left front shaft 27, and a left rear shaft 28 as joints that enable folding onto the work platform 6, and the right front shaft 25, the right rear shaft 26, the left front shaft 27, and the left rear shaft 28 are at different heights, so that the multiple handrails can be folded onto the work platform 6 without being removed from the work platform 6, and it becomes easy to lower the height of the work platform 4. In addition, it becomes easy to overlap the multiple handrails when folded, and the folding work of the multiple handrails becomes easy.

[0041] In addition, the front handrail 7, rear handrail 8, left handrail 9, and right handrail 10 are provided above the front baseboard 15, rear baseboard 16, right baseboard 17, and left baseboard 18, which are multiple baseboards that are erected to surround the periphery of the work floor 6.This allows the front handrail 7, rear handrail 8, left handrail 9, and right handrail 10 to be folded up while the front baseboard 15, rear baseboard 16, right baseboard 17, and left baseboard 18 remain fixed to the work floor 6.This makes it possible to fold the front handrail 7, rear handrail 8, left handrail 9, and right handrail 10 without compromising the strength of the work platform 4.

[0042] In addition, the rear handrail 8 and right handrail 10 as part of the multiple handrails are integrally equipped with an upper right rear plunger 52 and a lower right rear plunger 54 as a lock pin mechanism that positions and fixes adjacent handrails to each other, thereby preventing loss of parts and simplifying the task of positioning and fixing adjacent handrails to each other.

[0043] In addition, the right handrail 10 and the left handrail 9 can be folded so that they overlap each other, making it possible to fold multiple handrails without making them bulky.

[0044] In addition, a door 73 is provided at the entrance 19 of the workbench 4, and the multiple handrails include a front handrail 7 as a third handrail, and the door 73 can be folded integrally with the left handrail 9 onto the work floor 6, and the front handrail 7 can be folded integrally with the right handrail 10 onto the work floor 6, making it possible to fold the multiple handrails and door 73 without them taking up too much space.

[0045] In addition, the multiple handrails include a rear handrail 8, which has a rear right axle portion 49 and a rear left axle portion 50 as joints that enable it to be folded onto the work floor 6, a folding rear handrail body 43 that can be folded onto the work floor 6, and a rotating rear handrail body 44 that can be folded onto the work floor 6 integrally with the left handrail 9, making it possible to fold the multiple handrails without them taking up too much space.

[0046] In addition, the third handrail 8 and the fourth handrail 7 are detachably attached to the gable side baseboards 15, 16, and the third handrail 8 and the fourth handrail 7 are foldable onto the first handrail 9 and the second handrail 10, respectively. This allows the third handrail 8 and the fourth handrail 7 to be folded and stored together with the first handrail 9 and the second handrail 10, simplifying the storage process.

[0047] The present invention is not limited to the above embodiment, and various modifications are possible within the scope of the present invention. Each plunger and each lock pin in this embodiment can be modified as appropriate. For example, the shape of the lock pin may be an L-shape that makes it easier to check the fastening state other than a straight shape. In addition, the front handrail 7 and the door 73 may be detachable from the work floor 6. In addition, the rear handrail 8 may be integrally provided with a folding rear handrail body 43 and a rotating rear handrail body 44, and may be foldable onto the work floor 6 via the rear right shaft portion 49 and the rear left shaft portion 50. In addition, with regard to the door side baseboard, the left side sliding vertical member 83 and the right side sliding vertical member 84 are inserted vertically slidably into through holes 87, 88 formed in the left and right ends of the door side baseboard 75, respectively, to integrate the door main body and the door side baseboard, and when each sliding vertical member is fixed in a raised position with each lock pin, the sliding vertical members come out completely from the through holes and the door main body and the door side baseboard are separated, and the door main body rotates relative to the left front vertical member via the door side upper axis portion and the door side lower axis portion, and the door side baseboard rotates relative to the left front end post via the door baseboard axis portion. [Explanation of symbols]

[0048] 1 Lifting device 4 Workbench 6 Working platform 7 Front handrail (fourth handrail) 8 Rear handrail (third handrail) 9 Left handrail (first handrail) 10 Right handrail (second handrail) 15 Front skirting board (gable side skirting board) 16 Rear baseboard (gable side baseboard) 17 Right side baseboard (beam side baseboard) 18 Left side baseboard (beam side baseboard) 73 Door 74 Door body 75 Door side skirting board S space X Longitudinal direction Y Short side

Claims

1. A work platform of a lifting platform device having a plurality of handrails surrounding a periphery of a work platform, A door is provided for opening and closing the entrance to the workbench, The handrails are rotatable between a stored state in which they are folded onto the work floor and a usage state in which they are erected substantially perpendicular to the work floor, The plurality of handrails include a first handrail and a second handrail erected in the longitudinal direction of the work floor in the use state, and a third handrail erected in at least one of the lateral directions of the work floor, In the stored state, the first handrail and the second handrail are stored above the third handrail, A girder side baseboard is provided at the lower ends of the first handrail and the second handrail, The door includes a door body and a door side baseboard that is vertically movable relative to the door body. A workbench for a lifting platform device, characterized in that the door side baseboard is fixed at a position higher than the girder side baseboard, and the door body is configured so that the door side baseboard and the second handrail can be folded together.

2. A workbench of a lifting platform device as described in Claim 1, characterized in that the third handrail is stored in the space formed between the opposing girder side baseboards.

3. The plurality of handrails include a fourth handrail in a short side direction of the work floor opposite the third handrail, The fourth handrail is pivotally attached to either the first handrail or the second handrail, 3. The work platform of the lifting platform device according to claim 1 or 2, characterized in that, in the stored state, the work platform can be folded up in a state where it overlaps with either the first handrail or the second handrail.

4. The third handrail and the fourth handrail are provided with a gable side baseboard at their lower ends, and a part or all of the gable side baseboard is erected in the stored state, 4. The work platform of the lifting platform device according to claim 3, wherein the first handrail and the second handrail are supported by the girder side baseboard in the stored state.

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