JPS6319409B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a lifting device.

For example, when it is necessary to change the conveyance direction of a conveyor for conveying goods, conveyors of different heights are arranged in directions that intersect with each other, and an elevating device is provided at the intersection of the conveyors, so that the conveyance direction of the conveyor can be changed. A method is used in which the articles are raised or lowered to the height of the other conveyor using the lifting device and then transferred to the other conveyor. Conveyors conventionally used for this purpose are configured so that an actuator drives a lifting platform that supports conveyor elements such as rollers while guiding it up and down with a guide. Since a guide is required for the platform, the structure is complicated and necessarily expensive, and there is a disadvantage that the guide obstructs inspection and maintenance of the lifting device.

The present invention was achieved by focusing on the above-mentioned drawbacks of conventional lifting devices, and provides an lifting device that does not require a guide for the lifting platform, has a simple structure, is inexpensive, and is easy to inspect and maintain. The purpose is to

That is, the elevating device of the present invention has a pair of rotating shafts that extend in mutually intersecting directions in horizontal planes with different levels, and a pair of rotating shafts extending to one side from each of the pair of rotating shafts so that the end portions are located in a vertical relationship with each other. an actuator arranged substantially perpendicularly between the drive levers of the pair of rotating shafts and simultaneously imparting rotation to the rotating shafts; an operating lever provided to extend from the other rotating shaft to a side opposite to the drive lever on that rotating shaft; and ends of the operating levers of both rotating shafts; and an elevating table connected to the elevating table via a link, and the operating levers of the two rotating shafts move simultaneously in the same direction by the operation of the actuator, thereby raising and lowering the elevating table. According to this configuration of the present invention, the lifting table can be raised and lowered while maintaining a horizontal posture due to the rigidity of the lifting table itself and the rigidity of the rotating shaft, drive lever, action lever, link, etc., and the guide member is provided. There will be no need. Therefore, there is no problem that the operating parts such as the actuator are in the shadow of the guide member, which hinders inspection and maintenance.The structure is simple, and the platform can be raised and lowered in parallel with one actuator. Become.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, in FIGS. 1 and 2, a conveyor 1 consists of a series of rollers 1a arranged in a row in one direction. A conveyor 2 is provided consisting of a series of rollers 2a arranged at right angles to each other. As shown in FIG. 2, the rollers 2a of the conveyor 2 are arranged in a horizontal plane at a higher level than the rollers 1a of the conveyor 1. At the intersection 3 of the conveyors 1 and 2, the rollers 19 are arranged at regular intervals, and a small roller 3a rotating in the same direction as the roller 2a is arranged between two sets of adjacent rollers 19. . Second
As shown in the figure, the small roller 3a is rotatably mounted on the lifting table 4, and as the lifting table 4 moves up and down, it moves between the retracted position shown by the solid line and the protruded position shown by the imaginary line in Fig. 2. be moved. In the extended position, the small roller 3a is at the same height as the roller 2a, and in the retracted position, it is lower than the roller 1a. Therefore, the article sent over the rollers 1a is stopped at the intersection 3 and then transferred to the lifting platform 4.
is lifted by raising the roller 3.
Roller 2 of conveyor 2 by rotating a
It is moved onto a.

FIG. 3 shows the elevating mechanism of the elevating table 4. This elevating mechanism consists of a horizontal rotating shaft 7a rotatably supported by a pair of brackets 6a provided on the base 5.
and a horizontal rotating shaft 7 extending in a direction perpendicular to the horizontal rotating shaft 7a at a higher position than the horizontal rotating shaft 7a and rotatably supported by a pair of brackets 6b.
It is composed of b. A drive lever 8a is fixed to the rotating shaft 7a so as to extend on one side thereof, and a driving lever 8b similarly extending on one side is fixed to the rotating shaft 7b.
is provided. The drive levers 8a, 8b are arranged such that their free ends are located one above the other, and the free ends of both levers 8a, 8b are respectively connected to opposite ends of a linear actuator 9, such as an air cylinder, for example. Further, the rotating shaft 7a is provided with a pair of operating levers 10a extending in the opposite direction to the drive lever 8a near both ends thereof, and this operating lever 10a is connected to a bracket 12a provided on the lower surface of the lifting platform 4 by a link 11a. ing. The rotating shaft 7b has drive levers 8b near both ends thereof.
A pair of operating levers 10b are provided that extend in the same direction as the lifting platform 4, and the operating levers 10b are connected to a bracket 12b provided on the lower surface of the lifting platform 4 by a link 11b.

In the above configuration, when the actuator 9 is extended, the drive lever 8a on the rotation shaft 7a is pushed downward, the drive lever 8b on the rotation shaft 7b is pushed upward, and the rotation shafts 7a and 7b are respectively pushed with arrows A and 8b. A rotation in the direction indicated by B is given. As a result, the operating levers 10a and 10b are both rotated upward, and the lifting platform 4 is pushed up. At this time, the pair of operating levers 10a of the rotating shaft 7a both rise by the same distance, and the pair of operating levers 10b of the rotating shaft 7b also rise by the same distance. Since they are connected to each other, the lifting distances of these operating levers are the same, and the lifting platform 4 is maintained in a horizontal position. Even when an unbalanced load is acting on the lifting table 4, the rigidity of the lifting table 4 itself and the rotating shafts 7a, 7
b. The horizontal posture of the lifting platform 4 is reliably maintained due to the rigidity of each lever and the like. The lifting platform 4 is lowered by contracting the actuator 9.

In addition, in the above-mentioned embodiment, the rotating shafts 7a, 7
b are arranged so as to be orthogonal to each other, but the intersection angle of these rotational axes does not necessarily have to be 90°.
Further, the driving lever and the operating lever on the same rotational shaft do not need to be in the same direction or in opposite directions forming an angle of 180 degrees, but may be arranged so that they extend on the same side or on opposite sides of the rotational shaft. That's fine. Although the lifting device of the present invention is conveniently used in combination with a conveyor as shown in the illustrated example, it is not limited to such use.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an example of a conveyor suitable for using the lifting device of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a perspective view of an embodiment of the lifting device of the present invention. 4... Lifting platform, 7a, 7b... Rotating shaft, 8a,
8b... Drive lever, 9... Actuator, 1
0a, 10b...Action lever.

Claims (1)

[Claims] 1. A pair of rotating shafts extending in mutually intersecting directions in horizontal planes with different levels, and a drive lever extending to one side from each of the pair of rotating shafts and disposed so that the end portions are positioned in a vertical relationship with each other; an actuator arranged substantially perpendicularly between the drive levers of the pair of rotating shafts and simultaneously imparting rotation to the rotating shafts; and an actuator extending from one of the rotating shafts to the same side of the rotating shaft as the driving lever. an action lever;
an operating lever provided to extend from the other rotating shaft to the opposite side of the driving lever on that rotating shaft; and a lifting platform coupled to the ends of the operating levers of both rotating shafts via links. The elevating device is characterized in that the actuating levers of both of the rotary shafts move simultaneously in the same direction due to the operation of the actuator, thereby raising and lowering the elevating platform.