JPS6025360B2 - Crane hanging load resting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for stopping swinging of a load suspended by a crane.

This type of device is known to be used as a device to stop the swinging of a load suspended by a crane. It converts the swinging motion of the suspended load into vertical movement of a beam on the crane's trolley, and stops this vertical movement by providing resistance with a damper. Steady rest devices subject the beam to large bending forces when the beam moves up and down.

For this reason, the strength of the beam is increased so that it can withstand the bending force, but this has the disadvantage that the beam becomes large and heavy. An object of the present invention is to provide a lightweight steady rest device.

An embodiment of the present invention will be described below with reference to FIGS. 1, 2, and 3.

A container crane for loading and unloading a container 5 between a ship 1 and land with difficulty by pulling a container 5 onto a hoist 6 is equipped with a trolley 20 that is self-propelled on wheels 3 on a girder 2 of the container crane, as shown in FIG.

A plurality of hoisting lobes 10 let out from the hoisting device 4 hang down from the trolley 20, and the hoisting lobes 10 are suspended from the trolley 20. A hanging tool 6 is also suspended from the loop 10. The hoisting rope 10 is 4 as shown in Figure 2.
A route exists.

The hoisting rope on the first path is stretched between the sheaves 27a, 27b and the sheave 6a on the hanging tool 6. The hoisting rope on the second route is the sheaves 27c and 27d and the sheave 6b on the hoist 6.
It is passed on to. The hoisting rope on the third route is sheave 2
7e, 27f and the sheave 6c on the hanger 6. The hoisting rope of the fourth route is stretched between the sheaves 27g and 27h and the sheave 6d on the hanging shell 6. sheep 27a,
27b, 27c, and 27d are rotatably provided on the same shaft 28a.

The sheaves 27e, 27f, 27g, and 27h are rotatably provided on the same shaft 28b. One end of the shaft 28a is a link 25a
At one end, the other end of shaft 28a is attached to one end of link 25b. One end of the shaft 28b is connected to one end of the link 24a,
The other end of the shaft 28b is attached to one end of the link 24b. Therefore, the hoisting lobe 10 is connected to the links 24a, 2
4b, 25a, 25b and the hanging tool 6 via a sheave. Each link 24a, 2
Each pond end of 4b, 25a, 25b connects pin 2 to trolley 20.
3a, 23b', 23c, 23d, it can be attached freely up and down.

The two trolleys are provided with frames 21a and 21b extending downward in the center as a part thereof. The lower end of this frame 21a and one end of the link 24a are connected by a hydraulic piston-cylinder device 30a. The lower end of the frame 21b and one end of the link 24b are connected to the same machine by a hydraulic piston-cylinder device 30b. Also, frame 2
The lower end of 1a and one end of link 25a are a hydraulic piston.
They are connected by a cylinder device 31a, and the lower end of the frame 21b and one end of the link 25b are connected by a hydraulic piston-cylinder device 31b. Each hydraulic piston/cylinder device 30a, 30b, 31a, 31b is connected to each frame 2.
1a and 21b are pin-coupled so that they can freely rotate up and down, and are pin-coupled to each link 24a, 24b, 25a, and 25b so that they can freely rotate up and down.

Further, it may be connected to each link 24a, 24b, 25a, 25b via each shaft 28a, 28b. As shown in FIG. 3, between the lower cylinder chambers of each hydraulic piston/cylinder device 30a, 31a, there is a throttle valve 33 in the middle of the piping 35.
The pipe 3 is connected between the cylinder chambers above the valley.
4. The lotus is passed through the throttle valve 32 in the middle.

Each hydraulic piston-cylinder arrangement 30b, 31b is likewise provided with a throttle valve. According to this embodiment, when the hanging device 6 and the container 15 swing from the solid line display state to the chain line display state shown in FIG. It becomes a trend.

Therefore, each ring 24a, 24b is connected to the pin 23a, 23
The hydraulic piston and cylinder devices 30a and 30b are retracted by swinging downward around b. Therefore, the oil in the lower cylinder chambers of the hydraulic piston-cylinder devices 30a, 30b moves through the throttle valve 33 into the lower cylinder chambers of the hydraulic piston-cylinder devices 31a, 31b. Therefore, hydraulic piston-cylinder devices 31a, 31
b extends and transfers the oil in the upper cylinder chamber through the throttle valve 32 into the upper cylinder chambers of the hydraulic piston cylinders 30a, 30b. The swing energy is link 24
a, 24b, but this rocking motion is absorbed and canceled by the resistance force when the oil of the hydraulic piston-cylinder devices 30a, 30b passes through the throttle valves.

Therefore, swinging of the hanging tool 6 and the container 15 is suppressed.
The vibration in the direction of the arrow A shown in FIG.
Swing b upward. Therefore, when the deflection direction is reversed in the direction opposite to the arrow A, all of the deflection energy is quickly converted into the rocking motion of the rings 25a, 25b, and the deflection in the direction opposite to the arrow A shown in FIG. Suppress in the same way as the direction. At this time, each hydraulic piston. Cylinder devices 31a, 31b, throttle valves 32, 33, and piping 34, 3
The attenuator 5 has the effect of absorbing and canceling the deflection energy. Also, at this time, link 25
Since the swinging positions of the links 25a and 25b are changed upward, a long downward swinging stroke of the links 25a and 25b is obtained, and a good vibration energy absorbing and canceling effect is achieved. The above action is repeated depending on the magnitude of the swinging energy, but the swinging of the hanging tool 6 and the container 15 is stopped.

According to the steady rest structure of this embodiment, each link 24a, 2
4b, 25a, 25b receive vibration energy as a link rocking force due to hoisting rope tension, and the connection points of hydraulic piston/cylinder devices 30a, 30b, 31a, 31b to each link 24a, 24b, 25a, 25b are the same. Since it can be made into one point, each link 24a,
No bending force is applied to 24b, 25a, 25b or each hydraulic piston/cylinder device 30a, 30b, 31a, 31b.

For this reason, there is no need to consider how to withstand bending force, and each link 24a, 24b, 25a, 25b or each hydraulic piston/cylinder device 30a, 30b, 31a? 31
b can be prevented from becoming large and heavy. As above,
According to the present invention, it is possible to suppress the swinging device of a crane or the steadying of a suspended load without applying bending force to the steadying device.
The effect of making this steady rest device small and lightweight can be obtained.

[Brief explanation of drawings]

Fig. 1 is an overall view of a container crane, Fig. 2 is an overall perspective view of a steady rest device according to an embodiment of the present invention, and Fig. 3 is a conceptual diagram of the steady rest state of the steady rest device shown in Fig. 2. be. 5...Container 1, 6...Hanging tool, 10...
...Hoisting rope, 20...g. Lee, 23a, 23b, 23C, 23d...Pin, 24
a, 24b, 25a, 25b... link, 30a, 30
b, 31a, 31b...hydraulic piston/cylinder device, 32, 33...throttle valve. Sai'zuju and Zuzai 3 diagrams

Claims (1)

[Claims] 1. A first link and a second link are provided rotatably suspended from the trolley at one end and the other end in the running direction of the trolley, respectively, and each of the first link and the second link A sheave for suspending the hanging equipment was provided on the lower end side, and a first damping device and a second damping device were provided between the first link and the trolley and between the second link and the trolley, respectively. A hanging load resting device for a crane, which is characterized by: