JPS5817030Y2 - Hanging beam steady rest device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a hanging beam steadying device for a crane that carries out cargo handling operations such as containers, and particularly relates to a hanging beam steadying device with an improved structure of a rope sheep holding section.

The applicant previously provided this type of suspension beam steady resting device, and the device was designed to support a trolley 1 as shown in Fig. 1.
The upper ends of a pair of left and right pendulum levers 2゜2 are pivotally supported on the sides of the
The hoisting sheaves 6.6 of the spreader 5 are passed through the hoisting ropes 4, 4 to the rope sheaves 3, 3 pivotally supported at their lower ends.
The pendulum levers 2, 2 are suspended from the hydraulic cylinder 7.7.
It is configured to expand and contract in the relative direction.

Load handling and transportation is carried out by moving the trolley 1 sideways with the suspended load 8 suspended by the spreader 5. In this case, when the rope sheep 3, 3 are close to each other and at a small distance from each other, Since load swing occurs, in order to prevent this, the pendulum levers 2, 2 are widened by extending the hydraulic cylinder 7.7, and the rope sheeps 3, 3 are separated from each other by a large distance.

However, since a large force is acting on the rope sheeps 3, 3 to draw them together due to the hanging load, a considerable amount of power is required to spread the rope sheeps 3, 3 together, and for this reason, the rope The hydraulic cylinders 7, 7 for mutually expanding and contracting the sheeps 3, 3 had to be of large capacity, and the control system required equipment, which was extremely uneconomical.

This idea was devised to solve the above problems, and its purpose was to bias a pair of rope sheeps provided on the trolley that can be expanded and contracted in relative directions, so that the suspended load could be A hanging vinyl steady rest device that balances the pulling force acting on each of the rope sheep due to the load, and thereby allows the rope sheep to spread smoothly at any time with a small power to prevent the load from swinging. The purpose is to provide a simple configuration.

An example of this invention will be explained below with reference to FIGS. 2 and 3.

In FIG. 2, a trolley body 11 is suspended from a crane track girder 10 via upper trolley wheels 12 and 13 so as to be able to move freely.

The trolley body 11 has link mechanisms 14 and 15 for holding sheaves provided on both sides thereof.

The link mechanisms 14 and 15 each include a pair of pendulum levers 16 and 17 whose upper ends are pivotally supported at laterally spaced positions on both sides of the trolley body 11, and shafts 18 and 19 with both ends attached to their lower ends. They are rotatably connected, with the connecting portion being the lower rotational shaft support 20 and 21 and the middle portion being the upper rotational shaft support 22.
It is composed of weight bars 23 and 24.

In such a link mechanism 14, 15, a rope sheep 25, 26 is attached to each of the lower rotation shaft supports 20, 21.
In addition, the rope sheep 25, 2 is attached to the upper rotation shaft support 22.
6. A weight 27 is attached as a means for urging each other in the direction of expanding each other.

The link mechanisms 14 and 15 expand and contract between the rope sheeps 25 and 26 by the expansion and contraction of cylinders 28 and 29 that span between the intermediate portions of the pendulum levers 16 and 17 on both sides and the side wall of the trolley body 11. It is designed to be driven in the direction.

Each rope sheep 25.26 has a hoisting device (not shown)
The hoisting sheaves 32 and 33 are each suspended on a spreader (hanging beam) 31 via a hoisting rope 30 which is hoisted and rewound by a hoisting rope 30.

Next, the operation of the above embodiment will be explained.

First, the cylinders 28 and 29 are contracted and the rope sheep 25
26 With the hoisting rope 30 reeled back by the hoisting device in the state shown by the solid line in FIG. 2 where they are drawn closest to each other, the spreader 31 is lowered to a predetermined position.

After the spreader 31 suspends the load W, when the load W is hoisted to a predetermined height by hoisting the hoisting rope 30, the load causes the rope sheep 25 to
, 26 are subjected to a strong attractive force F.

However, since the rope sheep 25 and 26 are biased by the weight 27 in the direction of expanding them,
The urging force P brings the attracting force F into a balanced state.

Therefore, when the rope sheeps 25, 26 are spread horizontally to prevent load swinging, only a small amount of power is required. , 15, and spread smoothly laterally.

In addition, in the above example, the rope sheep 25.26
The means for biasing in the expanding direction is not limited to the weight 27, but may be other means such as a spring, and the driving means for the link mechanisms 14 and 15 may also be other than the cylinders 28 and 29. good.

As explained above, this invention applies a force to a pair of rope sheeps, which receives a force in the direction of mutual attraction due to a suspended load attached to a trolley via a link mechanism, in the direction of lateral expansion. Since the pulling forces are balanced, the power needed to spread both rope sheep laterally to prevent load swinging is reduced, which makes it possible to reduce the output capacity of the link mechanism drive means. It has great practical effects, such as being more economical and contributing to improving crane performance.

[Brief explanation of drawings]

Fig. 1 is a side view of a hanging beam steady rest device for a conventional crane, Fig. 2 is a side view of a hanging beam steady rest device according to an embodiment of this invention, and Fig. 3 is a schematic perspective view of a trolley with the same device. It is a diagram. In the figure, 11 is the trolley body, 14 and 15 are link mechanisms, and 2
0 and 21 are lower rotation shaft supports, 22 are upper rotation shaft supports, 2
5 and 26 are rope sheaves, 27 is a weight as a link mechanism urging means, 28 and 29 are cylinders as link mechanism driving means, 30 is a hoisting rope, and 32 and 33 are hoisting sheaves.

Claims (1)

[Scope of utility model registration request] A trolley that travels on the girder of a crane, a link mechanism that is pivotally supported by the trolley, a pair of rope sheeps that are attached to the lower side of the trolley, and a pair of rope sheaves that are attached to the link mechanism and are constantly attached in the direction of spreading the ropes apart. 1. A suspension beam steadying device comprising: a biasing means for biasing the rope; and a driving means for operating the link mechanism in the direction of expanding and contracting between the side rope sheaves.