Indoor lifting device

Abstract

To make smooth pushing-out movement of an operation cage of a lifting device.SOLUTION: This lifting device comprises: a lifting frame body vertically extended to be movable indoors; a lifting body vertically moved along the lifting frame body; an operation cage provided in the lifting body; and a pushing-out mechanism unit that moves the operation cage in a cross direction with respect to the lifting body. The pushing-out mechanism unit is formed by stacking four tables, and the tables move by equal amounts.SELECTED DRAWING: Figure 12

Description

[Technical field]

[0001] The present invention relates to a lifting device that is installed in a room, such as a vehicle paint booth, to enable workers to work at height. [Background technology]

[0002] When painting high-rise parts of large automobiles, or when carrying out preparatory work such as degreasing and masking before painting, workers stand on a lifting device installed in the paint booth, and the lifting device lifts the worker to the desired height to perform the work.

[0003] Conventionally, the lifting device includes, for example, a support suspended downward from the upper end of a side wall inside a room, a lifting body for raising and lowering the support, a work cage (work platform) on which a worker sits, and a protruding mechanism for protruding the work cage forward so that the work cage can be attached to and detached from the vehicle side. The lifting body is configured to be raised and lowered by a wire drive or a chain drive, and the protruding mechanism is configured to connect the work cage via an X-shaped link mechanism provided on the lifting body, and to move the base of one of the X-shaped links in the vertical direction by a hydraulic cylinder or the like to move the X-shaped links in the vertical direction, thereby moving the work cage in the front-rear direction.

[0004] Furthermore, horizontally extending rails are provided on the upper portions of the side walls, and the posts are mounted on the rails so as to be movable left and right, allowing workers to work over a wide range.

[0005] When a worker is to work at a high spot on the vehicle, the support pillar is moved along the rail to the desired position, and the lifting body is lowered to the floor without the work basket protruding, and the worker then gets into the work basket, which is raised to the desired height, and the protruding mechanism causes the work basket to protrude toward the vehicle, allowing the worker to work at the high spot on the vehicle.

[0006] For example, a general lifting device is disclosed in Patent Document 1. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2010-247947 A Summary of the Invention [Problem to be solved by the invention]

[0008] However, in the conventional protrusion mechanism, the work cage moves back and forth depending on the amount of movement of the base of the link, so in order to increase the amount of protrusion of the work cage, it was necessary to make the cylinder length long.

[0009] In addition, the amount of vertical movement of the base of the link did not match the amount of projection of the work cage, making the ride uncomfortable.

[0010] The present invention is intended to solve these problems. [Means for solving the problem]

[0011] (Configuration with three tables)

[0012] In order to achieve the above object, the indoor lifting device of the present invention comprises a lifting frame body extending in a vertical direction and movable within a room, a lifting body that moves up and down along the lifting frame body, The lifting body includes a work cage provided thereon, and a protruding mechanism for moving the work cage in the forward and backward directions relative to the lifting body. The protruding mechanism is fixed to the lifting body. , horizontally installed a fixed table; and a movable member configured to move in a forward and backward direction with respect to the fixed table. Above, horizontal a first moving table provided so as to be superimposed on the first moving table, and a second moving table configured to move in a forward and backward direction with respect to the first moving table, Above, horizontalan outermost movable table provided so as to be superimposed on the a fixed side rack portion provided on an upper surface of the fixed table and extending in the front-rear direction, an outermost rack portion provided on an underside of the outermost moving table and extending in the front-rear direction, a fixed side pinion portion provided on the rear side of the underside of the first moving table and engaging with the fixed side rack portion, an outermost pinion portion provided on the front side of the upper surface of the first moving table and engaging with the outermost rack portion, a belt or chain provided between the fixed side pinion portion and the outermost pinion portion and transmitting rotation of the fixed side pinion portion to the outermost pinion portion, and a mechanism for rotating the first moving table relative to the fixed table, the fixed side pinion portion being provided on the fixed table and the outermost pinion portion being provided on the fixed table. The present invention is characterized by comprising a moving means for moving the device in the forward and backward directions.

[0013] (Configuration with four tables)

[0014] The indoor lifting device of the present invention comprises a lifting frame extending in the vertical direction and movable indoors, a lifting body that moves up and down along the lifting frame, a work basket provided on the lifting body, and a protruding mechanism for moving the work basket in the front-rear direction relative to the lifting body, the protruding mechanism comprising a fixed table fixed to the lifting body, a first moving table formed to move in the front-rear direction relative to the fixed table and overlapped adjacent to the fixed table, a second moving table formed to move in the front-rear direction relative to the first moving table and overlapped adjacent to the first moving table, an outermost moving table formed to move in the front-rear direction relative to the second moving table and overlapped adjacent to the second moving table, a fixed side rack portion extending in the front-rear direction provided on one of the fixed table and the first moving table, and a movable rack portion provided on the other of the fixed table and the first movable table, the movable rack portion engaging with the fixed side rack portion provided on the other of the fixed table and the first movable table. a fixed-side pinion portion engageable with the first rack portion provided on one of the first moving table and the second moving table, a first rack portion provided on the other of the tables and engageable with the first rack portion, a second rack portion provided on one of the first moving table and the second moving table, and a second pinion portion provided on the other of the tables and engageable with the second rack portion, an outermost rack portion extending in the front-to-rear direction provided on one of the second moving table and the outermost moving table, and an outermost pinion portion engageable with the outermost rack portion provided on the other of the tables, a rotation transmission means for transmitting rotation between the fixed-side pinion portion and the first pinion, a rotation transmission means for transmitting rotation between the second pinion and the outermost pinion, and a moving means for moving at least one of the first moving table, the second moving table, and the outermost moving table in the front-to-rear direction relative to the fixed table.

[0015] (Configuration for 5 or more tables)

[0016] The indoor lifting device of the present invention comprises a vertically extending lifting frame movable indoors, a lifting body that moves up and down along the lifting frame, a work cage provided on the lifting body, and a protruding mechanism that moves the work cage in the front-rear direction relative to the lifting body, the protruding mechanism comprising a fixed table fixed to the lifting body, three or more intermediate movable tables that are stacked on the fixed table, four or more of which are stacked on the fixed table, and each of which moves in the front-rear direction relative to each of the adjacent tables, and an outermost moving table located at the outermost position; a fixed side rack portion extending in the front-rear direction provided on one of the fixed table and an adjacent moving table, and a fixed side pinion portion provided on the other and capable of meshing with the fixed side rack portion; a first rack portion provided on one of a first moving table and a second moving table adjacent to each other among the intermediate moving tables, and a first pinion portion provided on the other and capable of meshing with the first rack portion; a second rack portion provided on one of the outermost moving tables and a second pinion portion provided on the other and capable of meshing with the second rack portion; an outermost rack portion extending in the front-rear direction provided on one of the outermost moving tables or the intermediate moving table adjacent thereto, and an outermost pinion portion provided on the other and capable of meshing with the outermost rack portion; a rotation transmission means for transmitting rotation between the fixed-side pinion portion and the first pinion adjacent thereto; a plurality of rotation transmission means for transmitting rotation between the second pinion portion and the first pinion portion adjacent thereto, which are provided so that the rotation of the pinion is transmitted to adjacent moving tables in sequence from the fixed table side to the outermost moving table side among the intermediate moving tables; a rotation transmission means for transmitting rotation between the outermost pinion portion and the second pinion adjacent thereto; and a moving means for moving at least one of the intermediate moving tables or the outermost moving table in the front-rear direction relative to the fixed table.

[0017] The lifting frame has a screw shaft extending in the vertical direction and having a screw formed on its outer peripheral surface, and the movable body has a nut portion that is screwed onto the screw shaft, and a rotational drive means is provided for rotating the nut portion relative to the screw shaft or for rotating the screw shaft relative to the nut portion, and the movable body is raised and lowered relative to the lifting frame by rotating the nut portion relative to the screw shaft or by rotating the screw shaft relative to the nut portion.

[0018] The rotation drive means may be a belt, a chain, or a drive shaft.

[0019] The rack and the pinion meshing therewith have the same pitch. Effect of the Invention

[0020] According to the present invention, since a plurality of moving tables are used to project the work basket, the piston length can be shortened. Also, by using a plurality of moving tables, the projection amount can be increased.

[0021] Furthermore, by making the pitches of the racks and the pinions meshing therewith the same, each table protrudes forward by the same amount, so that the movement of the work basket becomes stable.

[0022] Furthermore, by moving each table by means of a rack and pinion, when the pressing cylinder stops, all the tables stop and are fixed, ensuring safety. [Brief description of the drawings]

[0023] [Figure 1] FIG. 2 is a schematic plan view showing a state in which the lifting device of the present invention is used. [Diagram 2] FIG. 2 is a schematic side view showing a state in which the lifting device of the present invention is used. [Diagram 3]1 is a schematic front view showing a state in which the lifting device of the present invention is used; [Figure 4] FIG. 2 is an explanatory side view of the lifting device of the present invention. [Diagram 5] FIG. 2 is an explanatory front view of the lifting device of the present invention. [Figure 6] FIG. 2 is an explanatory side view of the lifting device of the present invention. [Figure 7] FIG. 2 is an explanatory front view of the lifting device of the present invention. [Figure 8] FIG. 2 is an explanatory side view of the lifting device of the present invention. [Figure 9] FIG. 2 is an explanatory front view of the lifting device of the present invention. [Figure 10] 4 is an explanatory plan view of a fixed table of a protruding mechanism of the lifting device of the present invention. FIG. [Figure 11] 4 is a side view for explaining the operation of a protruding mechanism of the lifting device of the present invention. FIG. [Figure 12] 4 is a side view for explaining the operation of a protruding mechanism of the lifting device of the present invention. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Examples of modes for carrying out the present invention are given below. EXAMPLES

[0025] A first embodiment of the present invention will be described with reference to FIGS.

[0026] (1. Description of the indoor lifting device of the present invention)

[0027] (1.1. Overview of indoor lifting device)

[0028] Figures 1 to 3 show schematic diagrams of the lifting device of the present invention in use, Figures 4 to 9 show explanatory diagrams of the lifting device of the present invention, Figure 10 shows an example of a fixed table of the protruding mechanism part of the lifting device of the present invention, and Figures 11 and 12 show explanatory diagrams of the operation of the protruding mechanism part of the lifting device of the present invention.

[0029] As shown in Figures 1 to 9, the indoor lifting device of the present invention is provided in a room 2, such as an enclosed painting booth where work such as painting and preparation of a vehicle 1, for example a large automobile, is carried out, and comprises a vertically extending lifting frame 3, a lifting body 4 provided on the lifting frame 3 and moving up and down along the lifting frame 3, a work cage 5 provided on the lifting body 4, and an extension mechanism 6 that causes the work cage 5 to extend in the fore-and-aft direction (in the direction towards and away from the vehicle) relative to the lifting body 4.

[0030] Moreover, the lifting frame 3, as shown in Figures 4 to 9, is composed of a rectangular frame 7 whose surface faces the wall surface 2a of the chamber 2, and a screw shaft (worm shaft) 8 which is vertically fixed to the center of the frame 7 and has a screw formed on the outer peripheral surface from top to bottom.

[0031] As shown in FIG. 4, the upper part of the frame body 7 has a rail wheel section 10 which engages with, for example, a U-shaped rail 9 which extends horizontally and is fixed to the upper part of the wall surface 2a, and which is movable horizontally. Also, a floor wheel section 11 which is movable on the floor surface 2b is provided at the lower end of the frame body 7, and the frame body 7 is formed so as to be movable in the left-right direction along the wall surface 2a, as shown in FIG.

[0032] The lifting body 4 comprises a lifting main body 12, a nut portion 13 provided on the lifting main body 12 which is screwed onto the screw shaft 8 and can rotate freely around the axis of the screw shaft 8, and a nut portion rotation drive portion 14 such as an air motor or hydraulic motor which rotates the nut portion 13. The protruding mechanism portion 5 is fixed to the lifting main body 12, and the protruding mechanism portion 6 rises and falls together with the lifting main body 12.

[0033] (1.2. Description of the protruding mechanism)

[0034] (1.2.1. Explanation of when the protruding mechanism consists of four tables)

[0035] In addition, when the protrusion mechanism unit 6 is composed of, for example, four tables, as shown in Figures 4 to 12, the protrusion mechanism unit 6 is composed of a horizontally arranged rectangular plate-shaped fixed table 15 whose base is fixed to the lifting body 12, a rectangular plate-shaped first moving table 16 which is horizontally stacked and placed on the fixed table 15 via rotating rollers 30 such as rollers, and is formed to move in the front-rear direction along the fixed table 15, a rectangular plate-shaped second moving table 17 which is horizontally stacked and placed on the first moving table 16 via rotating rollers 30, and is formed to move in the front-rear direction along the first moving table 16, a rectangular plate-shaped outermost moving table 18 which is horizontally stacked and placed on the second moving table 17 via rotating rollers 30, and is formed to move in the front-rear direction along the second moving table 17, and a front-rear moving means 19 such as a piston unit which is provided on the fixed table 15 and moves the first moving table 16 in the front-rear direction relative to the fixed table.

[0036] In FIG. 10, 19a denotes a cylinder portion, 19b denotes a piston rod portion which expands and contracts relative to the cylinder portion 19a by hydraulic pressure or air, and the first movable table 16 is fixed to the tip of the piston rod portion 19b so as to be moved back and forth by the piston portion.

[0037] In addition, a fixed side rack portion 20 extending in the front-to-rear direction is provided on the upper surface of the fixed table 15, a first rack portion 21 extending in the front-to-rear direction is provided on the upper surface of the first movable table 16, a second rack portion 22 extending in the front-to-rear direction is provided on the lower surface of the second movable table 17, and an outermost rack portion 23 extending in the front-to-rear direction is provided on the lower surface of the outermost movable table 18.

[0038] In addition, a rotatable fixed side pinion portion 24 that meshes with the fixed side rack portion 20 is provided on the rear side of the underside of the first moving table 16, a rotatable first pinion portion 25 that meshes with the second rack portion 22 is provided on the front side of the upper surface of the first moving table 16, a rotatable second pinion portion 26 that meshes with the first rack portion 21 is provided on the rear side of the underside of the second moving table 22, and a rotatable outermost pinion portion 27 that meshes with the outermost rack portion 23 is provided on the front side of the upper surface of the second moving table 22.

[0039] In addition, a rotation transmission means is provided to transmit rotation between the fixed side pinion portion 24 and the first pinion portion 25, such as a belt 28 that transmits the rotation of the fixed side pinion portion 24 to the first pinion portion 25 being hung between the fixed side pinion portion 24 and the first pinion portion 25.

[0040] In addition, a rotation transmission means is provided for transmitting rotation between the second pinion portion 26 and the outermost pinion portion 27, such as a belt 29 that transmits the rotation of the second pinion portion 26 to the outermost pinion portion 27 being hung between the second pinion portion 26 and the outermost pinion portion 27.

[0041] The pitch of the fixed side rack portion 20 and the fixed side pinion portion 24 meshing therewith, the pitch of the first rack portion 21 and the first pinion portion 25 meshing therewith, the pitch of the second rack portion 22 and the second pinion portion 26 meshing therewith, and the pits of the outermost rack portion 23 and the outermost pinion portion 27 meshing therewith are all formed to be the same; in other words, the rack portions and the pinion portions meshing therewith are formed so that the amount of protruding movement between adjacent tables is the same.

[0042] In addition, the first moving table 16 and the second moving table 17 are formed with holes for the belts 28, 29 to pass through, as necessary.

[0043] Moreover, the work basket 5 is fixed to the outermost moving table 23.

[0044] As shown in FIG. 11, the lengths in the front-to-rear direction of the fixed table 15, the first moving table 16, the second moving table 17 and the outermost moving table 18 are almost the same, and when the protruding mechanism 5 is fully retracted, the length is the length of one table.

[0045] In addition, in cases where electricity cannot be used, such as inside a paint booth, all of the drive actuators within the room are of a fluid drive type, such as air or hydraulic, and the electrical equipment is configured to be installed outside the room.

[0046] The work basket may be provided with a switching valve for each drive source (fluid actuator) so that the work basket can be moved up and down, forward and backward, and left and right to any position.

[0047] In addition, in the pair of rack portions and pinion portions meshing therewith provided on each table, the rack portions and pinion portions may be reversed and the pinion portions and rack portions may be provided at corresponding positions.

[0048] In such a case, the belt that is stretched between the two pinion portions is stretched in an O-shape or in a figure-eight shape, as necessary, so that the moving tables move in the same direction.

[0049] Further, the back-and-forth moving means 19 such as a piston portion may move another moving table instead of moving the first moving table back and forth.

[0050] In addition, instead of fixing the screw shaft 8 to the lifting frame 3 and rotating the nut portion 13 screwed thereto relative to the lifting body 4 to raise and lower the lifting body 4, the nut portion 13 may be fixed to the lifting body 4 and the screw shaft 8 may be rotated relative to the lifting frame 3 to raise and lower the lifting body 4.

[0051] (2. Description of the Operation of the Indoor Lifting Device of the Present Invention)

[0052] Next, the operation and effect of the indoor lift device of the present invention will be described.

[0053] In the present invention, first, the vehicle 1 is stored in the room 2, and the vehicle 1 is positioned so that the side surface of the vehicle 1 is parallel to the wall surface 2a of the room 2.

[0054] Then, the lifting device is moved along the wall surface to the position where the vehicle 1 is to be serviced, and in order to enable a worker to enter the work cage 5, the rotary drive unit 14 is driven to rotate the nut unit 13 and move the lifting body 4 to the lowest end.

[0055] Moreover, the protruding mechanism portion 6 is put in the most contracted state as shown in FIGS.

[0056] When no worker is on board, the protruding mechanism 6 may be kept in the most retracted state all the time.

[0057] In this state, a worker gets on the work basket 5 and rotates the nut portion 13 to vertically raise the work basket 5 to a desired position.

[0058] Furthermore, by using the screw shaft and nut portion to raise and lower the product, it is possible to prevent accidental falls, compared to lifting devices that use wires or chains to raise and lower the product.

[0059] Then, for example, when an operator operates an operating lever or the like to move the protruding mechanism portion 6 forward, the first moving table 16 is moved forward and backward by the forward and backward moving means 19.

[0060] When the first movable table 16 moves the desired amount relative to the fixed table 15, the fixed side pinion 24 meshed with the fixed side rack portion 20 rotates the desired amount, and this rotation is transmitted to the first pinion portion 25 by a belt, so that the first pinion portion 25 also rotates in the same direction by the desired amount, and the second movable table 17 meshed with the first pinion portion 25 moves forward in the same direction by the desired amount.

[0061] Furthermore, as the second movable table 17 moves forward by the desired amount, the second pinion portion 26 meshing with the second rack portion 22 rotates in the same direction by the desired amount, and this rotation is transmitted to the outermost pinion portion 27, which also rotates in the same direction by the desired amount, and the outermost movable table 18 meshing with the outermost pinion portion 27 moves forward in the same direction by the desired amount.

[0062] When the first moving table 16 is moved backward by the front-rear moving means 19, the movement is reversed from the above.

[0063] (1.2.2. Explanation of when the protruding mechanism consists of three tables)

[0064] The example of the protruding mechanism unit 5 is shown as consisting of four tables, namely, one fixed table 15, one outermost movable table 18, and two intermediate movable tables 16, 17 provided between the fixed table and the outermost movable table, but it may also be consisting of three tables, namely, one fixed table 15, one outermost movable table 18, and one intermediate movable table 16 provided between the fixed table and the outermost movable table.

[0065] (1.2.3. Explanation of when the protruding mechanism consists of five or more tables)

[0066] Alternatively, it may consist of five or more tables, i.e., one fixed table 15, one outermost movable table 18, and three or more intermediate movable tables 16 provided between the fixed table 15 and the outermost movable table 18.

[0067] In such a case, among the multiple tables, in the intermediate moving tables excluding the fixed table and the outermost moving table, the first rack portion, the first pinion portion, the second rack portion, and the second pinion portion are respectively provided on the first moving table and the second moving table constituting each adjacent moving table, and the second pinion portion and the first pinion portion are respectively connected by a rotation transmission means such as a belt so that the movement of each table is transmitted from the fixed table side to the outermost moving table side among the intermediate moving tables.

[0068] (3. Effects of the present invention)

[0069] According to the present invention, the work basket is extended using a plurality of moving tables, so that the piston length can be shortened.

[0070] Furthermore, by using a plurality of moving tables, the amount of protrusion can be made large.

[0071] Furthermore, by making the pitches of the racks and the pinions meshing therewith the same, each table protrudes forward by the same amount, so that the movement of the work basket becomes stable.

[0072] Furthermore, by moving each table by means of a rack and pinion, when the pressing cylinder stops, all the tables stop and are fixed, ensuring safety.

[0073] Furthermore, there is only one drive source for driving the moving table, which contributes to space saving.

[0074] It is also possible to move each table back and forth, for example, by rotating the fixed pinion 24 with a motor, without providing a cylinder portion.

[0075] The drive may be transmitted by a timing belt, a chain, a drive shaft, or the like. [Industrial Applicability]

[0076] The indoor lifting device of the present invention can be used not only for painting and preparation work, but also for wrapping and stickering for advertisements, etc., as well as for maintenance such as air conditioner maintenance, HV battery maintenance, high-altitude electrical equipment maintenance, and van / wing maintenance. [Explanation of symbols]

[0077] 1 vehicle 2 rooms 2a Wall 2b Floor surface 3 Lifting frame 4 Lifting body 5 Work basket 6. Protruding mechanism 7 Frame 8 Screw shaft 9. Rail 10 Rail wheel section 11 Floor wheels 12 Lifting unit 13 Nut 14 Rotation drive unit 15 Fixed Table 16 First moving table 17 Second moving table 18 Outermost moving table 19 Forward and backward movement means 19a Cylinder section 19b Piston rod part 20 Fixed side rack section 21 First rack section 22 Second rack section 23 Outermost rack section 24 Fixed side pinion part 25 First pinion part 26 Second pinion part 27 Outermost pinion part 28 Belt 29 Belt 30 Roller

Claims

[Claim 1] A lifting frame extending in the vertical direction and movable within a room; a lifting body that moves up and down along the lifting frame; A work cage provided on the lifting body; A protruding mechanism unit that moves the work basket in the forward and backward directions relative to the lifting body, The protruding mechanism includes: A fixed table fixed to the lifting body and provided horizontally; a first moving table that is configured to move in a front-rear direction relative to the fixed table and is horizontally superimposed on the fixed table; an outermost moving table that is configured to move in a front-rear direction with respect to the first moving table and is horizontally superimposed on the first moving table; a fixed-side rack portion provided on an upper surface of the fixed table and extending in a front-rear direction; an outermost rack portion provided on a lower surface of the outermost moving table and extending in a front-rear direction; a fixed-side pinion portion provided on a rear side of a lower surface of the first moving table and meshing with the fixed-side rack portion; an outermost pinion portion that is provided on the front side of an upper surface of the first moving table and that meshes with the outermost rack portion; a belt or chain that is stretched between the fixed pinion portion and the outermost pinion portion and transmits rotation of the fixed pinion portion to the outermost pinion portion; a moving means provided on the fixed table for moving the first moving table in a front-rear direction relative to the fixed table; An indoor lifting device comprising:

Images