JPS6240279B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a device for controlling the attitude of a crane spreader.

[Prior art]

The prior art closest to the present invention is
This is shown in Japanese Patent No. 15537. This prior art applies trim motion, wrist motion, and turning motion to the spreader of a container crane to control the hanging posture of the spreader as desired. Specifically, a pair of rope sheaves are attached to a frame that can be freely pushed and pulled by a cylinder device on the girder of a container crane. and,
The rope taken out from the winch was lowered via a trolley running on the girder, and the lowered rope was hooked to a rope sheave attached to one corner of the spretzer, passed through the trolley again, hooked to the rope sheave on the frame, and then folded back. Later, in the same way, the rope is hooked from the trolley to the rope sheave attached to the other corner of the spretzer, returned to the trolley, and then hooked to the winch. In the same way, the ropes hanging from the other two corners of the spreader are folded back and hung on other rope sheaves on the pedestal. Connect each control cylinder device from the mount for each rope.

In such prior art, one side of each control cylinder device is extended and the other is retracted to pull a rope hanging from one diagonal corner of the spreader, and a rope from the other diagonal corner is pulled. Since the spreader can be pivoted and each control cylinder device can be extended or retracted in a wrist motion, the entire cradle can be moved to perform a trim motion.

However, in this conventional technique, the rope sheave on the frame is folded back and moved, so the rope is easily strained and damaged. Furthermore, if the control cylinder device malfunctions, it becomes impossible to perform both turning and wrist movements at once.

[Purpose of the invention]

An object of the present invention is to eliminate damage to the rope and to minimize the number of operations lost due to failure in a device that allows multiple operations such as trim, wrist, and rotation to be performed on a spreader suspended from a rope.

[Summary of the invention]

In the present invention, a pedestal is provided so as to be linearly movable by a first drive device, and an auxiliary pedestal installed on the pedestal is moved to a second pedestal.
The center of rotation of the auxiliary pedestal is controlled by a third driving device in which the auxiliary pedestal is provided with a first lever and a second lever rotatable about the center of both ends. The first lever and the second lever are provided so as to rotate in opposite directions, and two ropes that suspend one longitudinal side of the spreader are connected from one end of the movement range of the mount. one of the two ropes is connected to one end of the first lever, the other is connected to the other end, and the other end of the spreader in the longitudinal direction two ropes for suspending the frame are arranged substantially parallel to the movement direction of the frame from the other end side to one end side of the movement range of the frame, and one of the two ropes is connected to one end of the second lever,
The other end is connected to the other end.

[Embodiments of the invention]

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

A container crane uses a trolley that runs on an elevated girder. Winch 1 installed outside the trolley
Four ropes 1, 2, 3, 4 let out from a
Of these, the rope 1 is the rope sheave 6 of each rope sheave 5, 6, 7, 8, 9, 10, 11, 12 attached to the trolley to the rope sheave 19, 20, 21, 22 of the rope sheave attached to the spreader 24. 21, further passes through the rope sheave 5, and the rope sheaves 13, 14, attached to the girder.
It passes through the rope sheave 14 of the rope sheaves 15 and 16 and is introduced into the attitude control device 25. Similarly, the rope 2 is transferred from the rope sheave 10 to the rope sheave 22.
is hung from the rope sheave 22 to the rope sheave 9 and passed through the rope sheave 13 to the attitude control device 2.
It will be introduced in 5. Similarly, the rope 3 is sequentially introduced into the attitude control device 25 through each rope sheave 11, 20, 12, 15. Similarly, the rope 4 is sequentially introduced into the attitude control device 25 through each rope sheave 7, 19, 8, 16.

The attitude control device 25 is configured as shown in FIGS. 2 and 3.
It has a frame 36 which is freely movable with rollers 34 on the girder of the container crane. This frame 3
A piston rod 50 of a cylinder device 49 is pivotally attached to the girder 6 as a first driving device. A horizontal guide roller 40 is attached to the pedestal 36, and this guide roller 40 is placed against the side surface of a guide rail 42 provided on the girder. This guide rail 42 is elongated in the longitudinal direction of the cylinder device 49.

A vertical shaft 48 is fixed on the pedestal 36. The auxiliary frame 37 is attached to this shaft 48 via a bearing so that it can rotate freely horizontally. A portion of this auxiliary pedestal 37 protrudes horizontally, and a piston rod 52 of a cylinder device 51 attached to the pedestal 36 as a second drive device is connected to this protruding end by a shaft 35.

The center of a lever 38 is attached to the middle stage of the shaft 48 via a bearing so that it can freely rotate horizontally, and the center of a lever 39 is attached to the upper stage of the shaft 48 so that it can freely rotate horizontally via a bearing. A tooth profile 45 is machined in the upper center of the lever 38, and a gear 46 is rotatably attached to the gear box 43 by meshing with the tooth profile 45. A bevel gear 46b is fixed within the gear box 43 coaxially with a rotating shaft 46a of a gear 46. The bevel gear 46c meshed with the bevel gear 46b is coupled 44 to the rotating shaft of a motor 41 installed as a third drive device on the auxiliary frame 37.
Attached via. The upper part of the gear 46 is processed as a chain sprocket 47a. In addition, the lower center of the lever 39 is processed as a chain sprocket 47b, and each chain sprocket 47a, 47b is provided with an endless chain sprocket 47b.
It is multiplied by 7.

An end 54 of the rope 3 is fixed to one end of the lever 39, and an end 56 of the rope 4 is fixed to the other end. Further, an end 53 of the rope 2 is fixed to one end of the lever 38, and an end 55 of the rope 1 is fixed to the other end.

In this embodiment, when the piston rod 50 of the cylinder device 49 is retracted, the pedestal 36 is pulled to the right in FIGS. 2 and 3 and moves linearly. For this purpose, ropes 1 and 2 are loosened and ropes 3 and 4 are pulled. Therefore, rope sheaves 19 and 20 are pulled up and rope sheaves 21 and 22 are lowered. The spreader 24 therefore rotates in the direction of the arrow 33, causing a tilting trim movement. Conversely, pushing out the piston rod 50 causes a trim movement in which the spreader 24 rotates in the direction of the arrow opposite to the arrow 33.

Also, the piston rod 5 of the cylinder device 51
2, the auxiliary frame 37 rotates clockwise around the shaft 48 in FIG. At this time, motor 4
1 and the auxiliary frame 37 side and each lever 38, 39
Let's integrate them. In this way, at the same time as the auxiliary frame 37 rotates clockwise, the levers 38 and 39 also rotate clockwise, pulling the ropes 1 and 3.
4 will be loosened. For this purpose, arrow 31
A left turn as shown by occurs in the spreader 24. When the piston rod 52 is retracted, the ropes 1 and 3 are loosened and the ropes 2 and 4 are pulled, causing the spreader 24 to horizontally turn to the right.

When the motor 41 drives the gear 46 in the counterclockwise rotation direction about the shaft 46a, the lever 38 rotates clockwise about the shaft 48 in FIG.
9 causes a left rotation. For this purpose, ropes 1, 4 are loosened and ropes 2, 3 are pulled. Accordingly, the spreader 24 rotates in the direction of the arrow 32 to create a tilting wrist motion. Further, if the motor 41 is reversely rotated, a wrist movement in the opposite direction of the arrow 32 is caused.

In this way, the inclination in two directions and the posture in the horizontal turning direction of the spreader 24 are controlled. With this compensation, the drive devices are independent for each motion of wrist, trim, and turning, so even if a failure occurs in one drive device, only one of each motion will be disabled, and the other motions will be disabled. These two actions can be achieved. Then,
Fewer operations are lost due to failure.

Furthermore, since each rope 1, 2, 3, 4 is not squeezed by a rope sheave or the like within the attitude control device 25, damage to the ropes 1, 2, 3, 4 is reduced even if attitude control is repeated frequently. .

Further, as described above, since the driving devices are independent for each of the three operations, it is easy to apply a combined operation state of each operation to the spreader 24.

〔Effect of the invention〕

As described above, according to the present invention, in a device that can perform the three operations of trim, wrist, and turning on a spretzer using one set of devices, the three operations are controlled by independent drive devices for each of the three operations, so that no malfunction occurs. In addition to reducing the number of motions lost, the rope does not need to be folded back within the attitude control device, so there is an effect that the rope is less likely to be damaged.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the rope route of a container crane according to an embodiment of the present invention, FIG. 2 is a plan view of the attitude control device shown in FIG. 1, and FIG. 3 is a front view of FIG. be. 1, 2, 3, 4...rope, 5, 6, 7, 8,
9, 10, 11, 12, 13, 14, 15, 1
9, 20, 21, 22...rope sheave, 24...
...Spreader, 36... Frame, 37... Auxiliary frame, 38, 39... Lever, 49, 51... Cylinder device, 41... Motor, 48... Shaft, 46
...Gear, 45...Tooth profile, 47...Chain, 47
a, 47b... Chain sprocket.

Claims (1)

[Claims] 1. A pedestal is provided so as to be linearly movable by a first drive device, and an auxiliary pedestal installed on the pedestal is provided to be rotatable by a second drive device, and the pedestal is rotatable about the center of both ends. a first lever and a second lever that are capable of being rotated about the rotation center of the auxiliary pedestal by a third drive device installed on the auxiliary pedestal; are arranged so as to rotate in opposite directions, and two ropes suspending one longitudinal side of the spreader are arranged substantially parallel to the movement direction of the stand from one end of the movement range of the stand to the other end. One of the two ropes is connected to one end of the first lever, the other is connected to the other end, and the two ropes that hang the other longitudinal end of the spreader are moved from the other end of the movement range of the mount to the one end. A crane hoist, characterized in that the two ropes are arranged substantially parallel to the moving direction of the frame, one of the two ropes is connected to one end of the second lever, and the other is connected to the other end. Attitude control device.