KR20200076142A - Apparatus for elevating work table - Google Patents

Abstract

The present invention relates to a high-place work lifting device. The high-place work lifting device includes: a work stand on which a worker gets on for high-place work; a movable vehicle body for moving the work stand; a support part mounted above the vehicle body to support the work stand and including two pairs of posts in four places; and a driving part provided on the work stand to lift and lower the work stand from the posts. The driving part includes: two cylinders mounted in the lower part of the work stand; a towing part provided at a free end of a piston rod of each of the cylinders; and a pair of first and second wire ropes having one end fixed to each of the two opposite posts of each pair and having the other end fixed to the work stand via the towing part to be towed by the towing part, which is moved as the piston rod is moved backward, to enable the work stand to be guided and lifted from the posts. Therefore, since the work stand is lifted by towing wire ropes connected with posts on both sides at the same time through towing rollers mounted on a support plate fixed to a piston rod which moves forward or backward on one cylinder, the work stand can be quickly lifted and lowered, safety can be improved and control convenience can be improved. Two cylinders are installed in front of and behind the work stand and one single hydraulic motor is used to operate the two cylinders to simplify an operating means for lifting and lowering the work stand, thereby reducing costs for the manufacture and maintenance of the high-place work lifting device.

Description

Aerial platform lifting device{Apparatus for elevating work table}

The present invention relates to an aerial platform lifting device, and particularly to an aerial platform lifting device having an improved structure to quickly and safely lift the platform to a simplified structure, such as a tunnel ceiling, a building ceiling, a wall surface, or a bridge maintenance work. It is about.

In general, for maintenance work of a ceiling of a building, a ceiling of a tunnel, or a bridge, a work table carrying workers and necessary materials is moved up and down to a ceiling working height.

As an example of a device for raising and lowering such a work table, in Korean Patent Publication No. 10-2011-0043553 (published on April 27, 2011), pillars, handles, scaffolding, railings, slopes, and braces are used as main components. The ladder assembly and the two ladder assemblies facing each other in a pair, the scaffold, the railing is horizontally positioned, the brace is inclined, and the inclined column is inclined outwards, and a first stage work table in which a ladder worktable is built, The same as the method for constructing the ladder workbench of the first workbench, but the second work ladder assembly slides out of the first work ladder assembly, stops at the upper stator of the work work station, and assembles in the same way as the work tool 20, which is fastened to the work station. Disclosed is a work table having a structure using a three-stage ladder.

However, such a conventional work platform elevating structure has a problem that a lot of time is required to adjust the work table height as the ladder assembly needs to be assembled to increase the height to the first, second, and third steps.

As another example, in Korean Patent Registration No. 10-1632485 (registration date June 15, 2016), an elevator that is electrically controlled, and a work elevator comprising a deck unit installed to move up and down by the elevator means, The deck part is further provided with a plurality of pillar parts that are foldable or foldably provided, and a upper frame part supported by the pillar part, and a limit switch is built in the column part to allow the external pressure to be transmitted through the upper frame part. Disclosed is a working elevator configured to stop the lifting means due to the operation of the limit switch.

However, in the above-mentioned conventional patents, a pentagraph type work table is employed as a lifting means, and thus, there is a problem in that safety is not secured because the work height is restricted and several people work together and expand the work table to load materials.

Korean Patent Publication No. 10-2011-0043553 (published on April 27, 2011) Korean Registered Patent No. 10-1632485 (Registration Date June 15, 2016)

The object of the present invention is a traction guide roller mounted on a support plate fixed to a piston rod that is advanced or retracted from one cylinder in a state in which four posts are vertically fixed to the base frame to solve the problems of the conventional lifting platform described above. The worktable can be raised and lowered by simultaneously pulling wire ropes connected to both sides of the struts opposed by the field, and employing two cylinders back and forth on the base frame and driving two cylinders with one hydraulic motor to drive the worktable for lifting and lowering. It is to provide an aerial platform lift device of an improved structure to simplify the means.

The aerial platform work platform lifting device of the present invention for achieving the above object includes a work table to which the operator boards for the aerial work, a movable body to move the work table, and mounted on an upper side of the vehicle body to support the work table and support 2 In the aerial platform lifting device having a support having a pair of posts, and a driving unit provided on the work table to elevate the work table from the post, wherein the driving unit includes two cylinders mounted on the lower part of the work table, and each cylinder The traction unit provided at the free end of the piston rod, one end is fixed to each of the two opposed posts of each pair and the other end is fixed to the worktable via the traction unit to move together when the piston rod is retracted. And a pair of first and second wire ropes that are towed by and allow the workbench to be guided and raised on the posts.

The traction unit includes traction rollers rotatably mounted on the upper and lower sides of the support plate fixed to the free end of the piston rod, and when the piston rod is retracted, one end is fixed to the top of the post and the other end is fixed to the worktable. It is configured to pull one wire rope and a second wire rope, one end of which is fixed to the top of the post opposite the post and the other end of which is fixed to the workbench.

The first wire rope is fixed to one end at the top of the post and extends downward, then is horizontally shifted and extended relative to the worktable by a guide roller provided at the side end of the worktable, and then inverted through an upper traction roller. The other end is fixed to the side of the work table.

In addition, the second wire rope is fixed to one end at the upper end of the post facing the post and extended to the lower side, and then horizontally diverted from the lower side of the work surface by at least one guide roller provided at the side end of the work table to the opposite side of the work table. It extends to the side end, the direction is reversed by the guide roller, and horizontally extended again through the traction roller to fix the other end to the worktable.

The platform lifting platform for aerial work according to the present invention is one of two wire ropes guided by guide rollers in the deck frame, one end being fixed to the opposite props and the other end being guided by guide rollers in the deck frame, with four posts fixed vertically to the base frame The worktable can be raised and lowered by simultaneously pulling wire ropes connected to both supports by means of traction rollers mounted on a support plate fixed to a piston rod that is advanced or retracted from the cylinder of the worktable, so that the work can be quickly performed. In addition, the effect of improving the safety and the convenience of operation are improved, and by using two cylinders back and forth on the workbench and driving two cylinders with one hydraulic motor, the driving means for elevating the workbench is simplified to manufacture the hoisting device. This has the effect of reducing costs and maintenance costs.

In addition, due to the conventionally extended boom structure, the worktable can be raised and lowered with a wire rope as compared to the structure for raising and lowering the worktable, thereby simplifying the structure and reducing the cost.

1 is a front view of a work platform lifting device for aerial work according to the present invention shows a state in which the work table is lowered.
Figure 2 is a front view showing a schematic wire traction configuration showing a structure for pulling a wire fixed to each side and the other end is fixed to the workbench frame with one cylinder in the work platform lifting device of Figure 1;
FIG. 3 is a partially enlarged view showing a structure for pulling a wire, indicated by a circle on the left side of FIG. 1.
FIG. 4 is a partially enlarged view showing a structure in which a wire is connected to the upper end of the post, indicated by a circle on the right side of FIG.
5 is a front view showing a state in which the work table in the lowered state in FIG. 1;
Figure 6 is a schematic front view showing only the configuration for pulling the wire in Figure 5;

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings showing an embodiment of the present invention.

In Figures 1 to 4, the aerial platform lifting device according to the present invention is a worktable (1) that the operator boards for aerial work, a movable body (2) to move the worktable, mounted on the upper body worktable It includes a support (3) having two pairs of posts (4,4') at four locations, and a driving unit provided on the worktable to elevate the worktable from the post.

The worktable is guided by the corresponding posts 4 and 4'at each corner, and is moved up and down by a driving unit described later. In addition, it is preferable that the handrails 12 for the safety of the workers are installed on the support pillars 11 perpendicular to the work surface.

In addition, the vehicle body 2 is equipped with a wheel 21, it is preferable that it can be moved by an engine or a motor (22).

The driving part is provided with two cylinders 5 mounted on the lower part of the worktable 1, a traction part provided at the free end of the piston rod 51 of each cylinder, and two posts 4 of each pair of opposite ends 4 ,4'), and the other end is fixed to the worktable via the traction unit and is pulled by the traction unit moved together when the piston rod 51 is retracted, so that the worktable is placed at the posts 4,4'. It includes a pair of first and second wire ropes 63 and 64 to be guided and raised.

The traction unit includes traction rollers 61 and 65 respectively rotatably mounted on the upper and lower sides of the support plate 6 fixed to the free end of the piston rod 51, and the first wire rope 63 has one end portion. It is fixed to the upper end of the post 4 and the other end is fixed to the worktable via the traction roller 61, and the second wire rope 64 has an upper end of the post 4'whose one end is opposed to the post 4 It is fixed to the other end via the traction roller 65 is fixed to the workbench.

That is, the first wire rope 63 has one end fixed to the upper end of the post 4 and extended downward, and then a guide roller provided on the side end of the work table 1 as shown in an enlarged view of FIG. 3 ( 62) is extended horizontally with respect to the workbench, and then inverted through the upper traction roller 61, and the other end is fixed to the workbench 1 side.

The second wire rope 64 has one end fixed to the upper end of the opposite side post 4'and extended downward, and then a guide roller 67 provided at the side end of the worktable 1 as shown in FIG. , 68) is horizontally shifted from the lower side of the work table to extend to the opposite side end of the work table, the direction is reversed by the guide roller 66, and horizontally extended again through the towing roller 65 to get on the work table. The end is fixed.

The cylinder 5 and the piston rod 51, the traction rollers 61, 65, the guide rollers 62, 66, 67, 68 and the first and second wire ropes 63 shown in FIGS. 1 and 2 The arrangement configuration of ,64) is identically configured on the rear side shown in FIGS. 1 and 2, and a pair of cylinders 5 are operated at the same time, guided by each pair of posts 4,4', and Moves up and down.

The operation of the work table in the lowered state shown in FIG. 1 to the elevated state shown in FIG. 5 will be described.

When the piston rod 51 of the cylinder 5 is retracted in the advanced state, the traction rollers 61 and 65 mounted on the support plate 6 fixed to the free end of the piston rod 51 are shown in the left side in FIG. 1. It will move to the right.

At this time, the first wire rope 63 disposed inverted from the traction roller 61 is also towed to the right in FIG. 1 by the traction roller 61, and the other end of the first wire rope 63 is fixed to the worktable. Since the first wire rope 63 is fixed to one end at the top of the post (4) is towed. At the same time, when the second wire rope 64 inverted and disposed in the traction roller 65 is towed by the traction roller 65, the other end is fixed to the worktable and one end is fixed to the top of the post 4'. 2 The wire rope 64 is also towed. Thereby, as the first and second wire ropes 63 and 64 installed on the opposing posts 4 and 4'are simultaneously towed by the towing rollers 61 and 65, the worktable 1 has a post 4, 4'). Although not shown in the figure, the other cylinders and piston rods, traction rollers and guide rollers, and wire ropes are configured identically to those described above, so that the two cylinders are synchronized and operated simultaneously so that the worktable has two pairs of posts (4,4). It is guided and lifted by').

Since the two cylinders described above can be configured to operate simultaneously by one hydraulic motor, it is possible to reduce the manufacturing cost of the device, and the lifting and lowering operation of the worktable is quickly performed, and the two cylinders are operated by one hydraulic motor. By operating, the operator's operation convenience is improved, and the safety is improved.

The present invention can be used to elevate a platform for aerial work.

1: Workbench 2: Body
3: Support 4,4': Post
5: cylinder 6: support plate
21: wheel 22: motor
51: piston rod 61,65: traction roller
63,64: Wire rope 62,66,67,68: Guide roller

Claims (4)

For the aerial work, the work board on which the operator boards, the movable body to move the work table, the support part equipped with two pairs of posts at four places to support the work table mounted on the upper side of the vehicle body, and the work table to be lifted from the post In the aerial platform lifting device having a driving unit provided on the work table to descend,
The driving unit is provided with two cylinders mounted on the lower part of the worktable, a traction unit provided at a free end of the piston rod of each cylinder, and one end fixed to each of two pairs of opposing posts and the other end via the traction unit. It is fixed to the workbench is pulled by the traction unit that is moved together when the piston rod is retracted, the aerial platform lifting platform, characterized in that it comprises a pair of first and second wire ropes to be guided and lifted on the post Device.
According to claim 1,
The traction unit includes traction rollers rotatably mounted on the upper and lower sides of the support plate fixed to the free end of the piston rod, and when the piston rod is retracted, one end is fixed to the top of the post and the other end is fixed to the worktable. Aerial platform lifting device, characterized in that the one wire rope, one end is fixed to the top of the post facing the post and the other end is to be pulled to the second wire rope fixed to the workbench.
According to claim 2,
The first wire rope is fixed to one end at the top of the post and extends downward, then is horizontally shifted and extended relative to the worktable by a guide roller provided at the side end of the worktable, and then inverted through an upper traction roller. Aerial platform lifting device, characterized in that the other end is fixed to the side of the workbench.
According to claim 2,
The second wire rope is fixed to one end at the upper end of the post facing the post and extended to the lower side, and then horizontally diverted from the lower side of the work table by guide rollers provided at the side end of the work table to extend to the opposite side end of the work table. It is, and the direction is reversed by the guide roller, it is extended horizontally again through the traction roller, the aerial platform lifting device characterized in that the other end is fixed to the worktable.

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