JPS59108613A - Elevating device - Google Patents

Abstract

PURPOSE:To simplify the construction of an elevating device by connecting four sides of an elevating table one another with a link mechanism through rotary shafts. CONSTITUTION:Driving levers 8a, 8b are respectively extended to one side from a pair of rotary shafts 7a, 7b that intersect each other in upper and lower level surfaces and are disposed in such a manner that the end portions thereof are positioned above and below. An actuator 9 is mounted between the driving levers of the paired rotary shafts to drive the rotary shafts at the same time. An operation lever 10a is extended to the same side as the driving lever 8a on one rotary shaft 7a, and an operation lever 10b is extended from the other rotary shaft 7b to the opposite side to the driving lever 8b on the rotary shaft 7b. Thus, an elevating table 4 is connected to the end portions of the operation levers of both rotary shafts through links 11a, 11b. The thus constructed elevating table 4 is horizontally elevated without guide members to facilitate inspection and maintenance and simplify the construction of the device.

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 a lifting device is provided at the intersection of the conveyors, so that the conveyance direction of the conveyor is 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 to drive an actuator while guiding a lifting platform that supports conveyor elements such as rollers in the vertical direction using guides. 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 directions that intersect with each other in horizontal planes with different upper and lower levels, and a pair of rotating shafts that extend to one side from each of the pair of rotating shafts so that the ends thereof are located in earthwork 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 on the same side; an operating lever provided to extend from the other rotating shaft to the opposite side of the rotating shaft from the drive lever; and ends of the operating levers of both rotating shafts. and an elevating table connected to the part via a link, and the actuating levers of both rotating shafts are moved simultaneously in the same direction by the actuator to raise and lower 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 in that the WJ section of the workpiece (such as the 1°J) gets in the shadow of the guide member and interferes with inspections and preparations. It becomes possible to vertically move the planes parallel to each other.

Below, embodiments of the present invention will be explained with reference to the figures. First,
1 and 2, a conveyor 1 consists of a series of rollers 1a arranged in a row in one direction, and a series of rollers 2a arranged in a direction perpendicular to the conveyor 1. A conveyor 2 is provided. As shown in FIG.
The roller 1a is disposed in a horizontal plane at the same level as the roller 1a.

At the intersection 3 of =1 hair l1,2, the roller 19
are arranged at regular intervals, and between two sets of adjacent rollers 19 there is a small I'-- rotating in the same direction as the roller 2a.
La 3a is arranged. As shown in FIG. 2, the small roller 3a is rotatably mounted on the lifting table 4-)-, and as the lifting table 4 moves up and down, the small roller 3a moves to the retracted position shown by a solid line in FIG. Moved between protruding positions. 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 articles being fed on the rollers 1a are stopped at the intersection 3, lifted by raising the lifting platform 4, and transferred onto the rollers 2a of the conveyor 2 by rotating the rollers 3a. .

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 1-6a provided on the base 5, and the horizontal rotating shaft 7a. 7
The horizontal rotation shaft 7b extends in a direction perpendicular to the horizontal rotation shaft 7a at a higher position than the horizontal rotation shaft 7a, and is rotatably supported by a pair of brackets 6b. A drive lever 8a is fixed to the rotating shaft 7a so as to extend on one side thereof.
The rotating shaft 7b is similarly provided with a drive lever 8b extending to one side. The drive levers 8a, 8b are arranged such that their free ends are located above and below each other, and both levers 8a, 8b
The free ends of are respectively connected to the ends of a linear actuator 9, such as an air cylinder. Furthermore, a pair of operating levers 10a extending in the opposite direction to the drive lever 83 are provided near both ends of the rotating shaft 7a, and the operating levers 10a are connected to a bracket 12a installed on the lower surface of the lifting platform 4 by a link lla. ing.

A pair of operating levers 10b extending in the same direction as the drive lever 8b are provided near both ends of the rotating shaft 7b, and this operating lever 10b is connected to a bracket l-12b provided on the lower surface of the lifting platform 4 by a link llb. There is C.

In the above configuration, when the actuator 9 is extended, the driving lever 8a of the rotating shaft 7aJ is pushed downward, the driving lever 8b of the rotating shaft 7b is pushed in the -L direction, and the rotating shafts 7a and 7b are pushed downward. A rotation force H is applied as indicated by arrows Δ and B, respectively. As a result, the operating levers 10a, 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, but the operating levers
Since the levers 10a and 10b are connected to each other via the lifting platform 4, 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 horizontal posture of the lifting table 4 is reliably maintained due to the rigidity of the lifting table 4 itself, the rotating shafts 7a, 7b, each lever, etc. The elevator platform 4 is lowered by contracting the actuator 9.

In the above-described embodiment, the rotation axes 7a and 7b are arranged to be perpendicular to each other, but the angle of intersection of these rotation axes does not necessarily have to be 90 degrees. In addition, the drive lever and the action lever on the same rotation axis may be in the same direction or 180 degrees.
They do not need to be in opposite directions forming an angle of .degree., but may be arranged so as to extend on the same side or on opposite sides of the rotating shaft.

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 drawings]

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, 1Oa1
10b...Action lever.

Claims (1)

[Claims] a pair of rotating shafts extending in directions that intersect with each other in horizontal planes with different levels; a drive lever extending to one side from each of the pair of rotating shafts and disposed so that its end portions are positioned in a vertical relationship; an actuator arranged substantially perpendicularly between the drive levers of a pair of rotating shafts and simultaneously imparting rotation to the rotating shafts; and an actuator provided to extend from one rotating shaft to the same side of the rotating shaft as the driving lever. a lever, an operating lever provided to extend from the other rotating shaft to the side opposite to the drive lever on the rotating shaft, and a lifting lever coupled to the ends of the operating levers of both the rotating shafts via links. 1. An elevating device comprising a platform, wherein operating levers of both rotating shafts simultaneously move in the same direction by actuation of the actuator to raise and lower the elevating platform.