JPH0138152Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for synchronizing the lifting and lowering of a plurality of lifters, which can improve the synchronization accuracy of the lifting and lowering operations of a plurality of lifters, and can also raise and lower each lifter individually.

Generally, in a lifter device, it may be necessary to use a plurality of short object lifters to raise and lower a long object in synchronization while maintaining its levelness.

Conventionally, the means for synchronizing each lifter is as follows:
A device has been proposed in which the operation of each lifter drive cylinder is synchronized by flowing a predetermined amount of fluid into the lifter drive cylinder connected to each short object lifter, thereby synchronizing each lifter. However, this conventional device has the disadvantage that the operation of each lifter, that is, the lifting speed of each lifter, differs due to load fluctuations, and the horizontality is likely to go out of order.

The present invention was proposed in order to eliminate the above-mentioned drawbacks, and aims to provide a device that can improve the synchronization accuracy of the lifting and lowering operations of multiple lifters and also allows each lifter to be raised and lowered individually. purpose.

Hereinafter, the present invention will be described based on embodiments with reference to the drawings. FIG. 1 shows an embodiment of the present invention in use. Lifter 1 and lifter 2 of the lifter device place short objects on independent platforms 1c and 1c and raise and lower them, or lift long objects on independent platforms 1c and 1c.
This is an elevating and lowering device that is used to place the device over a distance of 100 m and raise and lower it at the same time.First, its known configuration and operation will be explained.

First, referring to the first lifter 1, the lifter drive cylinder 3 is a drive source that is controlled by a control device (not shown) and moves its moving portion 3c in the direction of the arrow 3a or 3b. Moving part 3 of this cylinder 3
c is connected to one end of the lever 4, and the other end is connected to the rotation shaft 1a. Support levers 4a, 4a are connected to both ends of this rotating shaft 1a. Support levers 4b, 4b are connected to both ends of the other rotating shaft 1b. Further, a first arm 5a is attached to the rotating shaft 1a, and a first arm 5b is attached to the other rotating shaft 1b, and both ends of a first connecting rod 5c are attached to the tips of the arms 5a and 5b. Installed. On the other hand, in the second lifter 2, a second arm 5a is attached to the rotation shaft 1a, and a second arm 5b is attached to the other rotation shaft 1b.
Both ends of the second connecting rod 5d are connected to the tip of the second connecting rod 5d.

As a result, the moving part 3 of the lifter drive cylinder 3
The base portion 1c of the lifter 1 is raised and lowered in conjunction with the movement in the direction of the arrow 3a or 3b. Second lifter 2
It also has the same configuration and performs the same operation.

Next, we will explain the first part about the lifting and lowering tuning device of the present invention.
This will be explained with reference to FIGS. 2 and 3. First, the first lifter 1 will be explained. The tip of one end of the connecting rod 5c closer to the lifter 2 is connected to the sliding rod 11 by a pin 9.

Next, the tip of one end of the connecting rod 5d of the second lifter 2 closer to the lifter 1 is connected to the rod receiver 12 by a pin 10. A rod receiver 12 is slidably fitted onto the sliding rod 11. cylinder 1
The sliding rod 11 and the rod receiver 12 are brought into a locked or unloaded state by means of a locking device 14 moving within the rod 5. As shown in FIG. 2, when the locking device 14 is located at the position 14a, the sliding rod 11 and the rod receiver 12 are locked together, and the sliding rod 11 cannot slide inside the rod receiver 12, thereby locking the locking device. 14 is the consolidation hole 1 of the rod receiver 12
2a and sliding rod 11 through the consolidation hole 11c, it is in an unconsolidated state, and the sliding rod 11
is slidable within the rod receiver 12.

As shown in FIG. 4, the sliding rod 11 and the rod receiver 12 have a rectangular cross section. The reason for this is that the sliding rod 11 and the rod receiver 12 are not misaligned, and therefore the locking device 14 can be easily connected to the consolidation hole 11c of the sliding rod 11 by the driving cylinder 15 of the locking device 14. This is because it is inserted into the consolidation hole 12a of the receiver 12.

Next, the operation will be explained.

In the case of raising and lowering a short object, the locking device 14 is pulled out from the connecting holes 12a and 11c by the driving cylinder 15 of the locking device 14, and the coupling between the sliding rod 11 and the rod receiver 12 is released. Therefore, the sliding rod 11 is located at the position 11 within the rod receiver 12.
a or 11b, and the base portions 1c, 1c of the lifters 1, 2 are individually raised and lowered.

Next, when lifting and lowering long objects, that is, lifters 1 and 2
When raising and lowering in synchronization with the lock device 14
is moved to position 14a by cylinder 15, and sliding rod 11 and rod receiver 12 are solidified. This solidification is at the lowering limit for both lifter 1 and lifter 2,
The horizontal level state, that is, the sliding rod 11
Consolidation hole 12a of rod receiver 12 with bushing
Preferably, this is done in a position where the locking device 14 can be easily inserted. By being solidified in this manner, the lifters 1 and 2 move up and down in exact synchronization.

As explained above, the present invention improves the precision of the lifting and lowering synchronization of each lifter by solidifying a plurality of lifters for short objects to each other, and prevents the horizontality from being distorted when lifting and lowering long objects. If the solidification of the lifters is released, each lifter can perform independent lifting and lowering operations.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram showing the usage state of one embodiment of the present invention, Fig. 2 is a plan view of the embodiment of Fig. 1, Fig. 3 is a front view, and Fig. 4 is an implementation of the embodiment of Fig. 1. FIG. 3 is an end view taken along line A-A of the example. 1, 2...lifter, 1a, 1b...rotation shaft, 1
c...Base part, 3...Lifter drive cylinder, 4a,
4b...Lever, 5a, 5b...Arm, 5c,
5d... Connection rod, 9, 10... Connection pin, 11...
...Sliding rod, 12...Rod receiver, 14...Lock device, 15...Cylinder.

Claims (1)

[Claims for Utility Model Registration] A rotating shaft rotated by a lifter drive cylinder, a lever disposed at both ends of the rotating shaft, and a platform that moves up and down in conjunction with the rotation of the lever are each independent. a sliding rod connected to a first arm attached to a rotating shaft of the first lifter in a plurality of lifters equipped with the lifter; and a sliding rod attached to a rotating shaft of the second lifter of the plurality of lifters; a rod receiver connected to a second arm attached to the rod and slidably fitted onto the sliding rod; a locking device for locking or unclamping the sliding rod and the rod receiver; and the locking device. and a cylinder for operating a plurality of lifters.