JP6013697B1 - lift device - Google Patents

Abstract

An elevating apparatus that reduces the manufacturing cost by reducing the number of parts and simplifying the structure is provided. The lifting device of the present invention is a lifting device including a driving mechanism 10 that lifts and lowers four legs 7 of a table 2 in a vertical direction, and the driving mechanism has a sprocket 9 extending at the front and rear. A shaft 11, a motor 6 that rotates the shaft, a winding disc 1 that is arranged between two left and right legs and has a rotation axis parallel to the shaft, and a rotational driving force of the shaft by meshing with the sprocket Endless chain 8 that transmits to the winding disc, and one set of left and right two ends, one end is fixed to the leg and the other end is fixed to the peripheral edge of the winding disc via idler 4 The end chain 3 is provided, and the legs are simultaneously raised or lowered through the end chain by rotating the winding disc in one direction. Compared to a conventional lifting device, the number of parts of the drive mechanism is reduced and the structure can be simplified, so that the manufacturing cost can be reduced. [Selection] Figure 1

Description

  The present invention relates to a lifting device for stably vertically transporting a heavy object such as an automobile mounted on a turntable.

When a car or the like is parked on a higher floor or a basement, it is necessary to lift and lower a turntable on which the car or the like is placed with a lifting device.
For example, Patent Document 1 includes four columnar racks that stand on a base, a table that is supported so that it can be moved up and down by engaging with the rack, and a drive mechanism that transmits driving force to the table. A lifting device is disclosed.
Although a detailed description is omitted, the table moves up and down by the drive mechanism transmitting the rotational driving force of the reduction motor to the small gear meshed with the rack via the intermediate gear, the gear and the shaft.
Patent Document 2 discloses a lifting device that lifts and lowers four legs of a table via a plurality of gears, swing arms, and the like.
The lifting devices of Patent Documents 1 and 2 have the advantages of high positioning accuracy, robustness and long life because the drive mechanism is composed of a large number of gears.

Japanese Patent No. 2634135 JP 2006-21927 A

However, the above prior art has the following problems.
That is, the techniques of Patent Documents 1 and 2 have a problem in that the drive mechanism is composed of a large number of gears, so that the number of parts is large and the structure is complicated, resulting in an increase in manufacturing cost.

  In view of the above problems, an object of the present invention is to provide an elevating device that reduces the number of components and simplifies the structure to reduce the manufacturing cost.

The lifting device according to the present invention is a lifting device including a driving mechanism for vertically moving the four legs of the table, wherein the driving mechanism extends back and forth and has a shaft having a sprocket at the end, and the shaft rotates. And a rotating disk disposed between the two left and right leg portions and having a rotating shaft parallel to the shaft, and the rotational driving force of the shaft is transmitted to the winding disk by meshing with the sprocket. It has an endless chain and a pair of left and right end chains that have one end fixed to the leg and the other end fixed to the peripheral edge of the winding disc via an idler. The leg is simultaneously raised or lowered through the end chain by rotating the winding disc in one direction.
Further, the main body of the shaft and the motor are disposed below the table, and the sprocket, the winding disk, the endless chain, the idler and the end chain are disposed on the side of the table.

The lifting device of the present invention transmits the rotational driving force of the motor to the legs via an endless chain, a winding disk, an end chain, etc., and lifts and lowers the table. Therefore, the number of parts of the drive mechanism is reduced and the structure can be simplified as compared with the case where a large number of gears are used as in the conventional lifting device, so that the manufacturing cost can be suppressed.
Further, if the sprocket, winding disc, endless chain, idler and end chain are arranged on the side of the table, the table is lowered to the vicinity of the motor and the shaft body without contacting the winding disc. And the range of motion of the table can be expanded.

Schematic front view showing the state where the table is lowered (a) and Schematic front view showing the state where the table is raised (b) Top view of lifting device

Hereinafter, embodiments of the lifting device of the present invention will be described.
As shown in FIGS. 1 and 2, the lifting device includes a table 2 in which four legs 7 are attached to a top plate 12, and a drive mechanism 10 that raises and lowers the legs 7 in the vertical direction. In FIG. 2, the top plate 12 is not shown.
The shape of the top plate 12 is not particularly limited, but is a rectangle in the present embodiment, and includes leg portions 7 extending downward at the four corners thereof. The shape of the leg portion 7 is not particularly limited, but an angle member having an L-shaped cross section is used in the present embodiment.
The four legs 7 are supported by the frame 5 so as to be movable up and down in the vertical direction.

The drive mechanism 10 includes a shaft 11, a motor 6, a winding disc 1, an endless chain 8, an idler 4, and an end chain 3.
The shaft 11 is a cylindrical member extending in the front-rear direction, and sprockets 9 are fixed to both ends thereof.
The motor 6 is engaged with the shaft 11 via a plurality of gears (not shown), and the rotational driving force of the motor 6 is transmitted to the shaft 11. As the motor 6, it is preferable to use a reduction motor (gear motor) integrated with a reduction gear.
Two front and rear winding disks 1 are used. The front and rear winding discs 1 are each disposed between two left and right leg portions 7 and supported by the frame 5 so as to be rotatable around a rotation axis extending in the front-rear direction. As will be described in detail later, two end chains 3 are fixed to the peripheral edge of one wound disc 1. By changing the diameter of the winding disc 1, the range of motion of the table 2 (distance from the ascending position to the descending position) can be adjusted.

The endless chain 8 is wound around the sprocket 9 with the gears engaged, and the rotational driving force of the shaft 11 is transmitted to the hoisting disk 1. The type of endless chain 8 is not particularly limited as long as it can mesh with sprocket 9, and for example, a roller chain can be used.
The idler 4 has a rotating shaft extending in the front-rear direction, and is supported by the frame 5 so that a total of four, one set on the left and right on the front side, and one set on the left and right on the rear side can be rotated around the rotation axis. The

The end chain 3 is used in a total of four sets, one set on the left and two on the front side and one set on the left and right. One end of each of the two front end chains 3 is fixed to the peripheral edge of the front winding disc 1, and the other end is fixed to the front left and right legs 7 via an idler 4. Is done. Similarly, one end of each of the two end chains 3 on the rear side is fixed to the peripheral edge of the winding disc 1 on the rear side, and the other end is connected to the two left and right rear sides via the idler 4. Fixed to the leg 7. The type of the end chain 3 is not particularly limited as long as it has a tensile strength enough to move the table 2 up and down, and for example, a leaf chain can be used. By using a leaf chain, chain elongation and rusting due to long-term use can be suppressed.
The level of the table 2 can be adjusted by changing the lengths of the two end chains 3 on the left and right. Further, the two left and right end chain 3 are preferably fixed at positions facing each other across the center (rotating shaft) of the winding disc 1, that is, on or near a straight line passing through the center.

  In the present embodiment, the main body of the shaft 11 and the motor 6 are arranged below the table 2, and the sprocket 9, the winding disk 1, the endless chain 8, the idler 4 and the end chain 3 are arranged on the side of the table 2. ing. Thereby, the table 2 can be lowered to the vicinity of the main body of the motor 6 and the shaft 11 without bringing the table 2 into contact with the winding disk 1 or the like, and the movable range of the table 2 can be expanded.

Next, the operation of the lifting device will be described.
When the operator drives the motor 6 from the state shown in FIG. 1 (a), the shaft 11 starts to rotate in one direction (for example, counterclockwise). Along with this, the sprocket 9 rotates counterclockwise, and the winding disc 1 also rotates counterclockwise via the endless chain 8. As described above, the winding disc 1 is supported by the frame 5 and therefore does not move in the vertical direction.

As the winding disk 1 rotates, a pair of left and right end chain 3 is wound around the winding disk 1 as shown in FIG. As described above, since the leg portion 7 is supported by the frame 5 so as to be movable up and down in the vertical direction, the left and right leg portions 7 are lifted upward by the end chain 3. Although FIG. 1 shows the operation of the winding disc 1 and the end chain 3 arranged on the front side of the lifting device, the left and right leg portions 7 are similarly lifted upward on the rear side.
As a result, the table 2 itself moves upward while maintaining a horizontal state, and although not shown, the turntable, the automobile, etc. on the table 2 rise.
When the operator stops the motor 6 at a timing when it reaches a predetermined height or automatically stops the motor 6 according to the setting, the rotation of the winding disc 1 stops and the table 2 stops.
The operator drives the turntable as necessary to change the direction of the automobile or the like and move it from the turntable .
In order to lower the table 2, the motor 6 may be rotated in the reverse direction.

  The present invention relates to an elevating apparatus that reduces the manufacturing cost by reducing the number of parts and simplifying the structure, and has industrial applicability.

1 Rolled disc
2 tables
3 Ended chain
4 Idler
5 frames
6 Motor
7 legs
8 Endless chain
9 Sprocket
10 Drive mechanism
11 axes
12 Top plate

Claims (2)

In a lifting device equipped with a drive mechanism that lifts and lowers the four legs of the table in the vertical direction,
The drive mechanism extends between the front and rear, a shaft having a sprocket at the end, a motor that rotates the shaft, and a winding disk that is disposed between the left and right two leg portions and has a rotation axis parallel to the shaft And an endless chain that transmits the rotational driving force of the shaft to the hoisting disk by meshing with the sprocket, and one end is fixed to the leg, and the other end is raised through an idler. It has a pair of chained ends that are fixed to the peripheral edge of the disc.
An elevating device characterized in that the legs are simultaneously raised or lowered via the end chain by rotating the winding disc in one direction.
2. The shaft main body and the motor are disposed below the table, and the sprocket, the winding disc, an endless chain, an idler, and an end chain are disposed on the side of the table. lift device.

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