JPS6025473Y2 - Work platform lifting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lifting device for a workbench, and more particularly to a lifting device for a workbench in which a pantograph is driven by a hydraulic cylinder to move the workbench up and down.

Generally, in civil engineering works such as ship construction, repair, building construction, tunnels, roads, etc., when the work position is considerably higher than the ground surface, a scaffold is erected at this work position, and workers walk on this scaffold or operate working machines. I'm letting you do it.

In this case, the height of the working position may vary.1. When changing the position of a hanging platform, a pantograph is installed on the platform, and this pantograph is driven to expand and contract with a hydraulic cylinder to adjust the height of the platform appropriately.A device for lifting and lowering the platform called a lid has recently been developed. has been done.

However, 1. Conventionally, this lifting device has one or more hydraulic cylinders installed upright or tilted, which limits the compression stroke of the pantograph and makes it impossible to fold it compactly. , It is not possible to move through small gaps when welding inside the hull block or working in tunnels, making it extremely inconvenient to carry and store.

For this reason, in order to fold the pantograph compactly, the hydraulic cylinder attached to it can be set horizontally or at a small angle of inclination, but if the hydraulic cylinder is horizontal or at a small angle of inclination, it will actually push up the dripping platform. The force that presses the pantograph in the horizontal direction, rather than the vertical heel, can cause damage to the pantograph.

Furthermore, there is no problem if one pantograph is attached below the workbench and this pantograph is telescopically driven by a hydraulic cylinder, but depending on the usage condition, it may be necessary to attach multiple pantographs to the workbench, and each pantograph A hydraulic cylinder is linked to the

For this reason, when operating each pantograph, each pantograph does not necessarily operate in synchronization.
There is a risk that the lids may not expand and contract at the same time, and as a result, when the workbench moves up and down, the top surface may be tilted or operate in a completely stable state, and in some cases, it may not move up and down.

That is, when there are positions on the workbench where a load is applied and positions where no load is applied, the pantograph in the position where the load is not applied tries to extend first, which causes this problem.

Therefore, the purpose of this invention is to fold the workbench into a compact size.
To provide a device for lifting and lowering a workbench which allows the workbench to be raised and lowered smoothly and in which each pantograph operates synchronously.

□An embodiment of the present invention will be explained below regarding tooth surfaces.

゛The support stand 1 consists of a rectangular frame, and this support stand 1 is divided into two left and right chambers 3 and 4'' via a central partition frame 2. is the auxiliary cylinder 5.'6°7.8,
9.10 stands up and can be expanded and contracted up and down.

On one chamber 3 side, two main hydraulic cylinders 11.
12 cylinder tube base end is bracket 13.14'
It is rotatably supported on the inner wall of the support base 1 through the support base 1, and its tip extends in the horizontal direction.Similarly, on the other side of the chamber 4, the bases of the two main hydraulic cylinders 15 and 16 are The ends are rotatably attached to the inner wall of the partition frame 2 via brackets 17 and 18, and the tips extend horizontally.

The main cylinders 11.12 on the chamber 3 side are connected via brackets 21.22 to the connecting members 19 that move left and right within the chamber 3, and similarly, the main cylinders 15.16 on the chamber 4 side also move the chamber 4 laterally. It is connected to a movably sliding connecting member 20 via brackets 21, 22, and the two connecting members 19, 20 are connected to a connecting rod 23 and a bracket 24.
25, and the connecting rod 23 is connected to the partition frame 2.
It passes through the center of the screen and slides left and right.

On the other hand, on the side of the chamber 3, two pantographs 26 and 27 are arranged in front and rear of the main hydraulic cylinder 311°12 so as to be vertically telescopic. The lower end is rotatably attached to the inside of the support base 1 via the bracket 28, and the other lJ'
The lower end of 7 is pivotally connected to the connecting □ member 19 via a bracket 29.

Similarly, of the two links constituting the other panda graph 27, the lower end of one link is rotatably attached to the inside of the support base 1 via the bracket 30, and the lower end of the other link is connected to the connecting member. 19 via a bracket 31.

Also, on the side of the chamber 4, two 7 (dagger rollers 32, 3°3) are arranged in front and behind the main hydraulic cylinder 15°16 so as to be vertically telescopic, and the two The bottom end of one of the links is bracket 3.
4, and the lower end of the other link is rotatably connected to the connecting member '20 via a bracket 35.

The lower ends of the two links (similarly constituting the other panda link) 33 are pivotally connected to the partition frame 2 and the connecting member 20 via brackets 36 and 37', respectively.

Each panda graph 26.27. The upper end of each link connected to the connecting member 19 and 20 in the two links 3' and 33 is pivotally connected to the workbench 40 via the bracket 3B' and 39'. The upper end of the other glue which is pivotally attached to the support stand 1 or the partition frame 2 side is the bin 41.1.
It is slidably connected to the workbench 40 via 2.

・Next, we will discuss the operation.

Main hydraulic cylinder 11. '12, 15. When compressing 16, J these cylinders connect the connecting rod 23, the connecting member 1
9. 7 integral & 3 connected via 20 so that they operate synchronously with the same stroke and at the same speed.

At this time, four panda graphs 2 are attached to the connecting member 1'9.20.
Since the lower ends of the links 6.27, 32.33 are connected, these links physically move in the same direction as the connecting members 19, 20, and the two links of each pantograph move by the amount of the sliding movement. As the spacing between the links narrows, the workbench 40
move upward.

・At this time, main cylinder 11:12, 15, 16 and auxiliary cylinder 5.・6゜7.8, 9.10 also expanded,
The push-up force first acts when the workbench 40 starts to rise to raise it to a desired height, and then the push-up force is applied to the main cylinders 11, 12, 15, and 16.

That is, since the main cylinders 11, 12, 15, and 16 extend horizontally, if you try to lift up the workbench 40 with only these main cylinders, the vertical component force will be small and the lifting operation will not work properly. Auxiliary cylinders 5, 6, 7, 8, 9, 1 that act in the vertical direction at the start of the upward movement
0, the workbench can be raised smoothly and quickly without putting any strain on the main cylinder.

Also, since the main cylinders 11, 12, 15, 16 and the panda graphs 26, 27, 32, 33 move integrally via the connecting members 19, 20 and the connecting rod 23, there is a delay in the operation of one of the members and they cannot be synchronized. If the workbench is tilted:
It is possible to prevent this.

In addition, since the main cylinders 11, 12, 15, and 16 are held horizontally, the thickness between the support platform 1 and the work platform 40 is extremely thin and compact when the platform 40 is fully compressed, making it easy to store and carry. Very convenient.

In the embodiment described above, the connecting rod 23 is connected to the connecting member 19 to which the main cylinders 11, 12, etc. 15, 16 are connected.
．． 20, but this connection position does not necessarily have to be limited to this position, and multiple Pandagra,
They may be placed at the same height on the floor.

That is, it can also be used by connecting the panda graphs at the middle or between their upper ends so that the panda graphs expand and contract in synchronization via the connecting rod 23.

Further, although the hydraulic cylinders are disposed on both sides of the chambers 3 and 4, it is also possible to dispose them in only one chamber and transmit the movement of the hydraulic cylinders to a plurality of pantographs.

Furthermore, it goes without saying that the hydraulic cylinder is not necessarily horizontal and can be used even if it is tilted.

As mentioned above, according to the present invention, ■ A main cylinder is provided in each chamber, and since this main cylinder is horizontal,
The workbench can be folded compactly.

■When the workbench is raised, the auxiliary cylinder is extended to generate vertical force, so the workbench rises smoothly.

■Since the main cylinder and each Panda graph are linked via connecting members and connecting rods, the expansion and contraction operations are synchronized, preventing work delays and tilting of the workbench.

[Brief explanation of the drawing]

The attached drawings relate to an example of the implementation of the present invention, in which FIG. 1 is a partially cutaway plan view, FIG. 2 is a vertical front view, and FIG. 3 is a panda 1.
FIG. 3 is a longitudinal sectional front view of the graph in an extended state.・1...Support stand, 5.6.7.
8...Auxiliary cylinder, 11. 1'2. 15
．． ,・j "6... Main hydraulic cylinder, 19,
20...; Isthmus member, 23... Connection rod, 26, 27, 32, 33... Panda graph,
40... Workbench.

Claims (1)

[Scope of utility model registration request] It consists of a workbench, a support stand placed below the workbench, and a plurality of pantographs placed between this support stand and the workbench, and each pantograph is driven to expand and contract to move the workbench. In the lifting device formed to move up and down, the support base is attached in the middle and partitioned into a plurality of chambers in the longitudinal direction of the support base by a partition frame &= yaw,
Each chamber has a main cylinder whose base end is pivoted and whose tip expands and contracts in the longitudinal direction of the support base, and auxiliary cylinders that expand and contract in the vertical direction are erected at the four corners of each support base and on the partition frame. The plurality of pantographs are arranged in line in each chamber, and the lower end of one of the two links constituting each pantograph is pivoted to the inner wall of each chamber,
The lower end of the other link is connected to a connecting member provided in each chamber so as to be movable laterally, each connecting member is connected to each other by a connecting rod, and the tip of the main cylinder is pivotally connected to each connecting member. A device for lifting and lowering a workbench.