JPS623753B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for controlling the movement of a suspended support.

As the automation of cranes progresses, the steady rest function that prevents the swinging of hanging equipment is rapidly increasing as a required function, so it is used not only for yard cranes but also for overhead cranes and other general cranes with trolleys. widely needed. At the same time, if the small horizontal rotation angle of the hanging tool can be controlled, it will be very convenient for positioning the hanging tool, etc.

A conventional trolley with a steady rest and a rotating mechanism will be explained. What is shown in FIGS. 1, 2, and 3 is a hoisting rope 3 fed out from a hoisting drum 2 attached to a trolley frame 1, which is a trolley using a conventional sheave block moving system.
is a hanging fixture 5 attached to a hanging fixture 5 via a fixing vertical sheave 4 attached to the trolley frame 1.
It is fixed again at the rope end 7 on the lower surface of the trolley frame 1 via the upper sheave 6. The other hoisting rope 3 is passed from the hoisting drum 2 to the bottom surface of the trolley frame 1 via a horizontal sheave 8 fixed to the trolley frame 1, via a moving sheave block 9, and via a hanging sheave 6. Fixed. Therefore, by rotating the hoisting drum 2, the hanging tool 5 is hoisted up and lowered. On the other hand, the steady rest rope 11 that stops the swinging of the hanging equipment has one end fixed to the hanging equipment 5 and the other end fixed to the steady rest drum 12 using an oil motor direct system attached to the bottom surface of the trolley frame 1. It is wound up. At this time, the steady rest rope 11 is stretched so as to intersect between the hanging tool 5 and the steady rest drum 12. The steady rest drum 12 is directly connected to an oil motor 13, and when the steady rest drum 12 is stepped on with a constant force by the oil motor 13, the swinging of the hanging tool 5 is stopped. Therefore, in this conventional method, the swinging of the hanging tool 5 is stopped using only the rope 11 to prevent swinging. Next, a conventional turning mechanism will be explained. As shown in FIG. 1, in the conventional rotating mechanism, due to the fleet angle of the hoisting drum 2, the hoisting rope 3 that is let out from the hoisting drum 2 is
The trolley is passed under the hoisting drum 2 via the horizontal sheave 8 on the upper surface of the trolley, and then passed through the hoisting sheave 6 from the sheave block 9 incorporating a movable vertical sheave.
The hoisting rope 3 is then returned to the movable sheave block 9 and fixed there. Further, the two moving sheave blocks 9 are connected by a rod 14 and a pin 15, and a hydraulic cylinder 10 is connected to one of the moving sheave blocks 9. Therefore, when it is desired to rotate the hanging tool, by expanding and contracting the hydraulic cylinder 10, the sheave blocks 9 for moving each other perform fan-shaped movements around the horizontal sheave 8 on the top surface of the trolley frame 1, and the lifting tool 5 is rotated. It's becoming like that. However, with this method, the number of sheaves increases, the trolley frame 1 has to be machined into an arc shape, and the moving sheave block 9 is directly under load, so the moving sheave block 9 cannot be moved. The force required to do this has become larger, and the hydraulic cylinder 10 has also become larger. The above is a conventional trolley with a steady rest and a rotating mechanism.

All conventional swing systems are large-scale and require many parts. In addition, the weight of the trolley as a whole has become quite heavy, which has a large effect on the overall weight of the crane, and there has been a strong desire for an improvement.

SUMMARY OF THE INVENTION An object of the present invention is to provide a simple and lightweight device for controlling the angle of rotation of a suspended support.

The main points of the present invention are to stop the pendulum movement of the suspension support by cross-hanging the hoisting rope, and to connect the rope end of the hoisting rope to a link mechanism and push/pull the link to make the hoisting rope This device has a pivot mechanism that can change the tension balance and pivot the suspended support.

Embodiments of the present invention will be described below with reference to FIGS. 4 to 8.

A hoisting drum 2, which is rotationally driven by an electric motor (not shown), is installed on a trolley frame 1, as shown in FIGS. 4 and 5. The four hoisting ropes 3 wound around this hoisting drum 2 are connected to the seventh
As shown in the diagram, there are four routes. Two hoisting ropes 3 let out from the hoisting drum 2
passes through the swinging sheave 4 built into the trolley frame 1 from the inside of the sheave 6 on the suspension support 5 and returns to the trolley frame 1.
The bent corners of the trolley frame 1 are fixed, one end at a time, to the lower ends of two L-shaped arms 23 which are swingably attached to the trolley frame 1 with pins 22. At this time, the two hoisting ropes 3, which are folded back from the sheave 6 on the hanger 5 and fixed to the L-shaped arm 23, are crossed as shown in FIGS. 6 and 7. Further, the other two hoisting ropes 3 that are directly fed out from the hoisting drum 2 to the sheave 6 on the hoist 5 are crossed in the same way, and the rope ends are fixed to the trolley frame 1. That is, when looking at each end from a direction perpendicular to the running direction of the trolley 1, the two ropes 3, 3 between the end of the rope 3 fixed to the trolley 1 and the sheave 6 form an X shape. ing.

The upper ends of the two L-shaped arms 23 are
As shown in FIG. 7, they are connected by a rod 24 and a pin 25. Pin 25 of one L-shaped arm 23
A telescopic rod portion of a piston/cylinder device 26 is connected to the portion between the trolley frame 1 and the pin 22 by a pin 27, and the cylinder portion is attached to the trolley frame 1 via a pin 28.

Next, the steady rest device will be explained. The steady rest device is basically the same as the conventional structure. However, in the conventional method of hanging the rope to prevent the hanging from swinging, the effect of stopping the swinging of the hanging device is reduced, and there is a possibility that the hanging device 5 will sag. Therefore,
In this embodiment, the steady rest rope 11 is improved to have an inverted V-shape as shown in FIG. 6, compared to the conventional cross-hanging rope. Therefore, the swinging of the hanging tool 5 can be stopped without causing the hanging tool to sag.

In another embodiment shown in FIG. 8, the load 24 of the embodiment shown in FIG.
The other configurations are the same as in the previous embodiment.

Next, operation control of each embodiment will be explained.

In Fig. 6, when the hanging device 5 swings from side to side, the steady rest rope 11 and the hoisting rope 3 arranged in an X-shape resist the swinging motion, resulting in an extremely strong steady rest resistance force, which quickly stops the swing. . When using a steady rest, it is desirable to provide resistance to the flow of oil in the circuit of the hydraulic motor 13 directly connected to the steady rest drum 12, thereby providing resistance to swing of the steady rest rope 11.

In this embodiment, the hoisting rope 3 is also cross-hung in this way to resist the hanging device 5 that is about to swing, thereby achieving a strong steadying.

When the hanging tool 5 stops swinging, the hanging tool 5 stops directly below the trolley frame 1, and the tension difference between the hoisting ropes 3 connected to each arm 23 is eliminated and balanced. When the hanging tool 5 is to be rotated, the rod of the piston/cylinder device 26, which is locked during the steady rest, is expanded and contracted.
When the rod of the piston-cylinder device 26 is pushed out, each arm 23 moves as shown in FIG.
It rotates around the pin 22 as shown by the solid line to the chain line. Therefore, one of the hoisting ropes 3 connected to each arm 23 is pulled, and the other is loosened. Therefore, the hoisting rope 3 moves from the solid line in FIG. 7 as shown by the chain line, and the hoist 5 horizontally turns in the A direction. In addition, the piston/cylinder device 26
If you pull in the rod, the hanging tool 5 will return to its original position.
When it is further pulled in, the hanging tool 5 horizontally rotates in the B direction. When it is desired to turn the hanging tool 5, it is sufficient to pull the hoisting rope 3, which is stretched in the direction in which the hanging tool 5 is to be turned, with a force corresponding to the turning angle of the hanging tool 5. However, if it is pulled directly, the entire tension of the hoisting rope 3 is added, resulting in a considerably large force. Therefore, an L-shaped arm 7 is adopted, and a link mechanism is used to enable the hanging tool 5 to turn with a small force equal to the turning force. Furthermore, when the hanging device 5 is turned, the hoisting rope 3 on one side is pulled, but the hoisting rope 3 on the opposite side is connected by a link mechanism, so the hoisting rope 3 is paid out by the amount of tension. become. Therefore, there is almost no imbalance between the left and right heights of the hanging tool 5, and there is almost no difference in tension between the hoisting ropes 3, and the hanging tool 5 can be turned smoothly.

In this way, each rope is arranged in an X shape,
Moreover, since the end of the rope is connected to the rotating arm, the hanging tool can be rotated even if only one end is equipped with a turning device.

That is, as shown in the attached reference diagram, each sheave 6,
Since the ropes 3, 3 are arranged in an It slopes sharply towards the center. Now, when the cylinder device is operated,
Each rope 3, 3 connected to each arm 23, 23
Since each degree changes, the degree of change in the difference between the horizontal component of the force pulling the left sheave 6 and the horizontal component of the force pulling the right sheave 6 is large. Therefore, even if the swing device is provided only on one side, the hanging tool 5 can be turned greatly.

This embodiment is simpler and lighter than the conventional large-scale turning mechanism. The number of sheaves has been reduced by four, and the complicated shape and machining of the trolley frame 1 are also eliminated. Therefore,
Since it is cheaper and the manufacturing time can be considerably shortened than the conventional method, it is possible to sufficiently cope with low cost and short delivery times, and to obtain great effects.

The other embodiment shown in FIG. 8 can also obtain the same effects as those described above, and in addition, focusing on the fact that the member connecting each arm 23 is not subjected to compressive force, the rod adopted in the previous embodiment is used. 24 with a lighter rope 2
9, achieving the effect of further reducing the overall weight.

As described above, according to the present invention, it is possible to control the swinging motion of a suspended support simply by adding two sets of connected arms and a drive means for the arms.
The effect that the swing control device is simple and lightweight can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a top view of the trolley part of a conventional crane, FIG. 2 is a front view of FIG. 1, FIG. 3 is a side view of FIG. 2, and FIG. 4 is a top view of a trolley according to an embodiment of the present invention. 5 is a front view of FIG. 4, FIG. 6 is a side view of FIG. 5, and FIG. FIG. 8 is a perspective view showing the arrangement of a hoisting rope and a turning mechanism according to another embodiment of the present invention. 1... Trolley frame, 2... Hoisting drum,
3... Hoisting rope, 5... Hanging tool, 4, 6... Sheave, 22, 25, 27... Pin, 23... Arm, 24... Rod, 26... Piston/cylinder device, 29... rope.

Claims (1)

[Claims] 1. After four ropes let out from a hoisting drum on a trolley are hung from four corners of the trolley to sheaves at four corners of a suspended support, each end is fixed to the trolley. at each end in a direction perpendicular to the direction of travel of the trolley, each rope between a rope end fixed to the trolley and a sheave of the suspended support, viewed from the perpendicular direction, The trolley is provided with two arms that rotate in the vertical direction at one end in the perpendicular direction, and one of the arms is provided at the end of each arm below the center of rotation. The trolley is provided with a drive device that connects the ends of each rope, connects each arm above the center of rotation with a connecting member, and rotates one arm. A motion control device for a suspended support.