KR200480884Y1 - Lifting device for working platform - Google Patents

Abstract

The work platform lift apparatus according to the present invention comprises: a fixed frame that is seated on the ground; Three or more slide columns vertically erected so that a lower end thereof is fixedly coupled to the fixed frame; A lifting and lowering frame coupled to the at least three slides so as to be able to move up and down along the longitudinal direction of the slide column, And an elevating unit mounted between the fixed frame and the elevating frame to apply an upward external force to the elevating frame. The work platform elevator according to the present invention can raise / lower the work platform in accordance with the height of the work space, thereby enhancing the work efficiency. The height of the work platform can be raised and lowered by one operation, There is an advantage that the possibility of injury can be significantly lowered.

Description

[0001] Lifting device for working platform [0002]

The present invention relates to an elevating apparatus for elevating and lowering a work table on which a worker steps up for work at a high point, and more particularly to a work table elevating apparatus capable of stably elevating and lowering a work table with a small force.

In general, the worktable is a mechanism that provides a stand space to enable work in a high place, and is widely used in a variety of places such as a home, an office, or an industrial field because it is stable, easy to use, and adjustable in height. For example, it is a device that can be used in a lot of places such as wall coverings, curtains, paint paintings, store displays, etc. in high places such as walls and ceilings, and various works such as car washing.

In general, a workbench is composed of a main frame constituted of a plurality of steel rods and mounted on a ground surface, and a base plate constituted of a steel plate structure and horizontally mounted on the end of the main frame. At this time, since the height of the scaffold is fixed to the conventional workbench, workers who work at various heights have to dispose of various kinds of workbenches according to the height of the work space.

In order to solve such a problem, a height controllable workbench has been proposed. However, since the conventional height control workbench has a complicated structure and can not utilize a conventional workbench (a workbench whose height can not be adjusted) There is a problem that it takes a lot of time. That is, when the height adjusting workbench is used, there is a problem that a conventional workbench is unnecessary, which causes waste of resources.

In addition, since the conventional height-adjusting workbench is generally configured to adjust the footboard height by increasing or decreasing the leg length of the workbench, the footboard height can not be raised and lowered by one operation. Of course, if the leg length of the work table is increased by using a separate driving motor, the height of the footrest can be easily adjusted. However, in such a case, the internal structure is complicated and the manufacturing cost is remarkably increased. There is a disadvantage that it can not.

KR 20-0429498 Y1

The present invention has been proposed in order to solve the above-mentioned problems. It is possible to work at various heights by raising and lowering the work table which can not be adjusted in height, and the height of the work table can be elevated as a whole by a single operation, And it is an object of the present invention to provide a pedestrian platform capable of providing high stability by significantly reducing the risk of breakage and falling.

According to an aspect of the present invention, there is provided a work platform lift device including: a fixed frame that is seated on a ground; Three or more slide columns vertically erected so that a lower end thereof is fixedly coupled to the fixed frame; A lifting and lowering frame coupled to the at least three slides so as to be able to move up and down along the longitudinal direction of the slide column, And an elevating unit mounted between the fixed frame and the elevating frame to apply an upward external force to the elevating frame.

The legs of the work table are formed in the shape of a hollow pipe parallel to the longitudinal direction of the slide pillars, and the upper side of the slide pillars is inserted into the legs of the work table.

The elevating unit includes a base block that is seated on the upper surface of the fixed frame, a support block that is seated on the bottom surface of the elevating frame, and a frame that is connected at one end to the base block in a rotatable manner, A pair of upper links each of which is connected to the support block so as to be rotatable in a rotatable manner and whose other ends are inclined downward in a direction of moving away from each other, A pair of fastening blocks connected to the pair of fastening blocks so as to penetrate through the pair of fastening blocks and adjusting the spacing distance between the pair of fastening blocks in the rotating direction, Respectively.

The fixed frame includes a fixed outer frame formed in a polygonal frame shape and coupled to a lower end of the slide column, a plurality of fixed connection frames extending from corners of the fixed outer frame toward a central portion of the fixed outer frame, And a fixed center block to which an end of the fixed connection frame is coupled,

The elevating frame includes a lift frame formed in a polygonal frame shape and passing through an upper end of the slide column, a plurality of lift connection frames extending from a corner of the lift frame toward the center of the lift frame, And a lift center block to which the end of the lift connection frame is coupled,

Wherein the base block and the support block are respectively coupled to the fixed center block and the elevation center block,

The fixed center block is located higher than the fixed outer frame, and the elevator center block is located at a lower position than the elevated outer frame.

On the lower outer circumferential surface of each slide column, a plate-shaped inclined piece having a wider width is provided.

The work platform elevator according to the present invention can raise / lower the work platform in accordance with the height of the work space, thereby enhancing the work efficiency. The height of the work platform can be raised and lowered by one operation, There is an advantage that the possibility of injury can be significantly lowered.

1 is an exploded perspective view of a work platform landing gear according to the present invention.
Fig. 2 is a perspective view of the work platform lift device according to the present invention in which the work platform is seated.
3 and 4 are side views showing a structure in which the workbench is seated on the workben lift apparatus according to the present invention.
5 and 6 are side views showing the use state of the work platform lift apparatus according to the present invention.
7 is a perspective view of a fixed frame and a lift frame included in the work platform elevating apparatus according to the present invention.
8 is a side view of a second embodiment of a work platform elevating apparatus according to the present invention.
9 and 10 are a partial perspective view and a use state view of the slide column included in the second embodiment of the work table elevating apparatus according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a work platform landing gear according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a perspective view of a work platform lift device according to the present invention on which a work platform is seated, and Figs. 3 and 4 are views showing a structure in which a work platform is seated on the work platform lift device according to the present invention Fig.

In the case where a construction such as an upper part of a wall, a ceiling or the like is to be constructed or repaired in a high area not reaching by the hand of a person standing on the ground, a structure (hereinafter referred to as " Is required. In general, the work table 10 includes a plurality of legs 12 vertically erected and an upper plate 14 coupled to the upper portion of the leg 12. The length of the leg 12 is not changed, The height of the upper plate 14 can not be adjusted.

The elevating device according to the present invention is a elevating device for elevating and lowering the work table 10 so that an operator can work even in a higher space. The elevating device includes a fixed frame 100 seated on the ground, (100), and four slide pillars (200) vertically installed to be fixedly coupled to the slide pillars (100). The slide pillars (200) A lifting frame 300 on which the leg 12 of the lifting frame 10 is seated and fixed and a lifting frame 300 mounted between the lifting frame 300 and the lifting frame 300, Unit 400 as shown in FIG.

When the lifting and lowering frame 300 is lifted and lowered by the operation of the lifting and lowering unit 400, the work station 10 mounted on the lifting frame 300 is lifted and lowered. The worker can work at various heights with one workbench 10, and the work efficiency is improved accordingly.

In this case, although a height adjustable work table 10 has been proposed in the related art, a conventional height adjustable work table 10 has a height adjustable nail (not shown) The conventional platform 10 is not required to be mounted on the worktable 10 by moving up and down the conventional worktable 10 instead of the worktable 10 itself, The most important feature is that the worker can work at various heights.

If the leg 12 of the work table 10 is simply placed on the lift frame 300, the work table may be separated from the lift frame 300, so that the work table 10 is placed on the lift frame 300 It should be fixed. For example, when the leg 12 of the work table 10 is formed in the shape of a hollow pipe parallel to the slide column 200 in the longitudinal direction, In a manner to be inserted in a fitting manner. When the upper part of the slide pillar 200 is inserted into the leg 12 of the work table 10 as long as the slide pillar 200 is not broken, So that the problem of the work table 10 falling from the lift frame 300 is not generated. When the upper part of the slide pillar 200 is coupled to be inserted into the leg 12 of the work table 10 as shown in this embodiment, the work table 10 can be lifted and lowered without a clamping unit such as a separate clamp, It can be fixed on the frame 300, which is advantageous in that it is very convenient to use.

The elevator unit 400 for elevating and lowering the elevator frame 300 is preferably constructed by an automobile jockey structure so that the elevator frame 300 can be easily raised and lowered only by manual operation of the operator without using any additional power.

That is, the elevating unit 400 includes a base block 410 that is seated on the upper surface of the fixed frame 100, a supporting block 420 that is seated on the bottom surface of the elevating frame 300, A pair of lower links 430 connected to the block 410 in a rotatable structure and extending upward in an inclined direction in a direction in which the other ends are mutually separated, A pair of coupling blocks 450 connected to the other end of the lower link 430 and the other end of the upper link 440 so as to be rotatable, A screw portion 460 coupled to the pair of fastening blocks 450 so as to penetrate through the pair of fastening blocks 450 and adjusting the spacing between the pair of fastening blocks 450 according to the rotation direction, 470). The threaded portion 460 is coupled to the fastening block 450 located at a remote position from the handle 470 so as to rotate only and to the fastening block 450 located near the handle 470 in a threaded engagement structure As the threaded portion 460 rotates, the distance between the pair of coupling blocks 450 is changed.

The lower link 430 and the upper link 440 are inclined so that the inclination of the lower link 430 and the upper link 440 is increased. When the screw block 460 is rotated to one side and the distance between the two engaging blocks 450 is narrowed, And the distance between the base block 410 and the support block 420 is increased, so that the lift frame 300 is raised. The lower link 430 and the upper link 440 are laid down so that the inclination of the lower link 430 and the upper link 440 is reduced so that the distance between the base block 410 and the support block 420 And the distance between the base block 410 and the support block 420 is reduced, so that the lifting frame 300 is lowered. Since the lift unit 400 is substantially the same as the lift lift joystick, detailed description thereof will be omitted.

Meanwhile, the wheel 101 can be provided on the bottom surface of the fixed frame 100 so that the operator can directly push and move the work platform 10 according to the present invention. In addition, when the worker moves on the work table 10, if the work platform 10 moves arbitrarily according to the present invention, the worker can lose his / her head and fall, and the wheel 101 is provided with a separate stopper 102 . As described above, the wheel 101, in which the clouds are blocked and released according to the user's selection, is commercialized in various fields such as a baby carriage and a walker, and thus detailed description of the wheel 101 will be omitted.

5 and 6 are side views showing the use state of the lift table of the work table 10 according to the present invention.

4, when the user grips the handle 470 of the screw portion 460 by hand and rotates to one side, the gap between the pair of coupling blocks 450 is distanced, and the base block 410 and the support block 420 The lift frame 300 coupled to the support block 420 is lowered due to its own weight as shown in FIG. 5, and a work table (not shown) mounted on the lift frame 300 10 also descend along the lifting frame 300. As shown in FIG. 5, when the worktable 10 is lowered in height, the worker climbing the worktable 10 can easily work in a relatively low work space.

At this time, the slide pillar 200 is inserted deeper into the leg 12 as the work table 10 is lowered. Since the slide pillar 200 is inserted into the leg 12 of the work table 10 during the descent of the lifting frame 300, the work table 10 does not sway or move sideways, .

4, the user grips the handle 470 of the threaded portion 460 by hand and rotates to the other side to narrow the gap between the pair of coupling blocks 450, The lift frame 300 coupled to the support block 420 is pushed up by the support block 420 as shown in FIG. 6, The worktable 10 mounted on the lifting frame 300 is also lifted along the lifting frame 300. As shown in FIG. 6, when the height of the work table 10 is increased, the worker climbing the work table 10 can easily work in a relatively high work space.

Although the slide pillar 200 is pulled out from the inside of the leg 12 as the work table 10 is raised, even if the lift unit 400 is operated to raise the lift frame 300 to the maximum, Is not completely drawn out of the leg 12 of the work table 10 and a part thereof is inserted into the leg 12 of the work table 10 as shown in Figure 6 so that the work table 10 is swayed sideways The phenomenon of moving does not occur.

7 is a perspective view of the fixed frame 100 and the lift frame 300 included in the elevating device of the work table 10 according to the present invention.

The fixed frame 100 and the lifting frame 300 may be spaced apart from each other by the lifting unit 400 and may be formed in any shape as long as they can stably support the work table 10. However, if the fixed frame 100 and the elevating frame 300 are formed in a single flat shape, their own weight becomes excessively large, and even if the operator uses the elevating unit 400, Can take. In addition, when the self-weight of the fixed frame 100 and the lifting frame 300 is increased, much force is also required to push the lifting and lowering device of the work platform 10 to the side by the present invention, 300) manufacturing cost is also increased.

Therefore, it is preferable that the fixed frame 100 and the lifting frame 300 are constructed in a structure in which a plurality of beams are coupled to each other to realize a high strength in weight.

That is, the fixed frame 100 includes a fixed outer frame 110 formed in a polygonal frame shape and coupled to a lower end of the slide column 200 and a fixed outer frame 110 extending from a corner of the fixed outer frame 110 A plurality of fixed connection frames 120 extending toward the center of the fixed connection frame 120 and a fixed center block 130 to which the ends of the plurality of fixed connection frames 120 are coupled. The lifting frame 300 also includes a lifting outer frame 310 formed in a polygonal frame shape and through which the upper ends of the slide pillars 200 pass and a lifting outer frame 310 extending from the corners of the lifting outer frame 310, And a lift center block 330 to which the ends of the plurality of lifting and connecting frames 320 are coupled. At this time, the base block 410 and the support block 420 are coupled to the fixed center block 130 and the elevation center block 330, respectively.

When vertical force is applied to the fixed center block 130 and the elevation center block 330 by the elevation unit 400 after the fixed frame 100 and the elevation frame 300 are manufactured as described above, The lifting and lowering of the lifting frame 300 can be smoothly performed because the lifting and lowering frame 300 is transmitted to the fixed outer frame 110 and the lifting and lowering outer frame 310 through the fixed connection frame 120 and the lifting connection frame 320.

8 is a side view of a second embodiment of the elevating device 10 according to the present invention. Figs. 9 and 10 are views showing a part of the slide column 200 included in the elevating device second embodiment of the work table 10 according to the present invention A perspective view and a use state diagram.

When the fixed frame 100 and the lifting frame 300 are constructed in a structure in which a plurality of beams are connected to each other to increase the strength of the fixed frame 100 and the lifting frame 300, The lifting connection frame 320 or the fixed connection frame 120 is stretched so that the lifting connection frame 320 and the four fixed connection frames 120 are pulled out of the lifting / The frame 310 may be sagged down or the base block 410 may be sagged down.

In this case, since the steel material forming the beam shape has a greater compressive strength than the tensile strength, the lift height of the work table 10 according to the present invention is determined by the weight of the work table 10 plus the weight of the worker, Or to the stationary connection frame 120 with a compressive stress.

8, the fixed center block 130 is positioned higher than the fixed outer frame 110, and the elevation center block 330 is positioned at a position lower than the elevated outer frame 310 . When the fixed center block 130 is positioned slightly higher and the elevation center block 330 is slightly lowered when the weight of the work platform 10 plus the weight of the worker is applied, The lifting and connecting frame 320 and the fixed connecting frame 120 are not easily deformed so that the lifting and lowering outer frame 310 can be deformed downward The effect that the phenomenon that the block 410 is sagged down does not occur can be obtained.

8, the weight of the fixed frame 100 and the lifting frame 300 can be increased as much as possible, so that the weight of the product can be reduced So that the manufacturing cost can be reduced.

When the elevator unit 400 can not support the elevator frame 300 due to malfunction or breakage of the elevator unit 400, the elevator frame 300 and the work table 10 may be lowered If a large impact force is applied to the lifting frame 300 at this time, the worker who has climbed up on the work table 10 is tucked up by the impact force, so that the worker can suffer a serious injury.

Therefore, it is preferable that the work platform 10 according to the present invention is structured to be able to stop slowly so that a large impact force is not applied even if the lift frame 300 is free to fall. Of course, if a plurality of compression cylinders are installed between the lifting frame 300 and the fixed frame 100, it is possible to prevent a large impact force from being applied to the lifting frame 300. However, Therefore, it is preferable to apply a very simple structure to the elevator frame 300 to allow the elevator frame 300 to be slowly stopped.

For example, as shown in FIG. 9, an inclined piece 210 having a plate shape (more specifically, a rectangular triangular plate shape) that widens in a downward direction is mounted on a lower outer circumferential surface of each slide post 200 .

The through hole is formed in the lift frame 300 so that the slide column 200 can pass smoothly but the slope piece 210 can not pass through the through hole. When the lifting frame 300 that has fallen freely falls into contact with the inclined piece 210, the inclined piece 210 is compressed and deformed by the applied load and passes through the through hole. However, even if the inclined piece 210 is compression-deformed, the narrow upper part can pass through the through hole, but the lower wide part can not pass through the through hole. Thus, When it comes down, it stops slowly.

When the slope piece 210 is formed on the slide column 200 as described above, the slope piece 210 is deformed and broken when the lift frame 300 is freely dropped, but a large impact force is not applied to the lift frame 300 Therefore, there is an advantage that the injury of the operator can be minimized.

While the present invention has been described in detail with reference to the preferred embodiments thereof, the scope of the present invention is not limited to the specific embodiments but should be construed according to the appended claims. Those skilled in the art will appreciate that many modifications and variations are possible without departing from the scope of the present invention.

10: worktable 12: leg
14: top plate 100: fixed frame
110: fixed outer frame 120: fixed connection frame
130: fixed center block 101: wheel
102: Stopper 200: Slide pillar
210: slope piece 300: lift frame
310: lift-and-lift outer frame 320: lift-
330: lift center block 400: lift unit
410: Base block 420: Support block
430: lower link 440: upper link
450: fastening block 460: threaded portion
470: Handle

Claims (5)

A stationary frame (100) which is seated on the ground;
Three or more slide columns 200 vertically erected so that the lower ends thereof are fixedly coupled to the fixed frame 100;
A lifting frame 300 coupled to the three or more slide columns 200 so as to be able to move up and down along the longitudinal direction of the slide column 200 and on which the legs 12 of the work table 10 are seated and fixed;
And an elevating unit (400) mounted between the fixed frame (100) and the elevating frame (300) to apply an upward external force to the elevating frame (300)
The fixed frame 100 includes a fixed outer frame 110 formed in a polygonal frame shape and coupled to a lower end of the slide column 200 and a fixed outer frame 110 extending from a corner of the fixed outer frame 110, A plurality of fixed connection frames 120 extending toward the central portion and a fixed center block 130 to which the ends of the plurality of fixed connection frames 120 are coupled,
The lifting frame 300 includes a lifting outer frame 310 formed in a polygonal frame shape and through which an upper end of the slide pillar 200 passes and a lifting outer frame 310 extending from an edge of the lifting outer frame 310 And a lifting center block 330 coupled to the ends of the plurality of lifting and lowering connecting frames 320,
The fixed center block 130 is positioned higher than the fixed outer frame 110 and the elevation center block 330 is positioned lower than the elevated outer frame 310,
The lower end of the slide pillar 200 is provided with a plate-like inclined piece (not shown) having a width gradually increasing downward so that the lifting frame 300 can be compressed and deformed by a load applied when the lifting frame 300 is freely dropped, (210) is provided on the work table (10).
The method according to claim 1,
The legs 12 of the work table 10 are formed in the shape of a hollow pipe parallel to the slide pillars 200 in the longitudinal direction,
And the upper side of the slide pillar (200) is inserted into the leg (12) of the work table (10).
The method according to claim 1,
The elevating unit (400)
A base block 410 mounted on the upper surface of the fixed frame 100, a support block 420 mounted on the bottom surface of the lift frame 300, A pair of lower links 430 each having one end connected to the support block 420 so as to be rotatable and the other ends of the lower links 430 extending downward in a direction in which the other ends are mutually moved away from each other, A pair of coupling blocks 450 connected to each other so that the other end of the lower link 430 and the other end of the upper link 440 are rotatable; And a handle 470 provided at one end of the threaded portion 460. The threaded portion 460 may be formed of a synthetic resin material, Work bench (10) Win Device.
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