JPH11292461A - Sway preventing device for suspension - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the sway of a suspension such as a spreader, etc., in its turning direction. SOLUTION: The displacement of a left side sheave unit 11 at the time of winding a left side moving rope 24 on a drum 23 is transmitted to a right side sheave unit 11 by a balancing rope 27, and the displacement of a right side sheave unit 11 at the time of winding a right side moving rope 25 on the drum 23 is transmitted to the left side sheave unit 11 by the balance rope 27, to displace both the sheave units 11 and 11 in different directions with each other so as to equalize moving quantity, to suppress the sway of a suspension in its turning direction via a suspension elevating rope 17 wound on a sheave 18 for the elevating rope of the sheave unit 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hanging device for preventing a hanging member such as a spreader from swinging in a turning direction.

[0002]

2. Description of the Related Art FIG. 7 shows an example of a container crane. The container crane travels along a rail 2 laid on a quay 1 and has a substantially horizontal position above the traveling body 3. The girder 4 provided, a boom 5 pivotally supported by the girder 4 so as to be pivoted upward and rotatably, a trolley 6 traversing along the girder 4 and the boom 5, and a trolley 6 suspended from the trolley 6. The head block 7 can move up and down with respect to the trolley 6, and the spreader 9 is mounted on the head block 7 and can lock the container 8.

In the above-described container crane, each operation of moving the traveling body 3 with respect to the quay 1, traversing the trolley 6 with respect to the girder 4 and the boom 5, moving up and down the head block 7 with respect to the trolley 6, and locking the container 8 with the spreader 9 is performed. In combination, the unloading operation of the container 8 from the ship 10 to the quay 1 or the container 8 from the quay 1 to the ship 10
Loading work.

[0004]

However, in the conventional container crane, the head block may be damaged due to the influence of the wind, the deviation of the center of gravity of the container 8 due to the loading state of the cargo, the rapid acceleration / deceleration of the trolley 6, and the like. 7 and spreader 9
May swing in the turning direction, making it difficult to unload or load the container 8.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a hanging device for preventing a hanging member such as a spreader from swinging in a turning direction.

[0006]

In order to achieve the above-mentioned object, the present invention provides a suspension device for preventing the movement of a trolley, which is attached to each of the left and right side portions of the trolley so as to be able to reciprocate in a traverse direction of the trolley and lifts and lowers the trolley. A sheave unit for pivotally supporting a lifting rope sheave around which a rope is wound, and a moving rope sheave pivotally supported on the left and right sides of one end of the trolley and capable of turning the rope from both sides of the trolley to one end. A sheave for a balancing rope pivotally supported on the left and right sides of the other end of the trolley and capable of turning the rope from both sides of the trolley to the other end, and winding the right moving rope when feeding the left moving rope. A drum that takes up the left-hand moving rope when taking out the right-hand moving rope,
A drive source for rotating the drum in both forward and reverse directions, the drum being provided at the center of one end of the trolley, the extension end of the left moving rope being locked to one end of the left sheave unit, and Wrapping the middle part around the left moving rope sheave, engaging the paying end of the right moving rope at one end of the right sheave unit, and wrapping the middle part of the right moving rope around the right moving rope sheave, The other end of each sheave unit is connected via a balancing rope, and an intermediate portion of the balancing rope is wound around the balancing rope sheave.

In the hanging device of the present invention, when the left moving rope is wound on the drum and the right moving rope is unreeled from the drum, the sheave unit on the left is displaced toward one end of the trolley, The displacement of the left sheave unit is transmitted to the right sheave unit via the balancing rope, and the right sheave unit is displaced toward the portion near the other end of the trolley according to the amount of movement of the left sheave unit.

When the right-hand moving rope is wound on the drum and the left-hand moving rope is unreeled from the drum, the right sheave unit is displaced toward one end of the trolley, and the displacement of the right sheave unit is balanced. It is transmitted to the left sheave unit via the rope, and the left sheave unit is displaced toward the portion near the other end of the trolley according to the amount of movement of the right sheave unit.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 6 show an embodiment of the suspension device for preventing the movement of the hanging device according to the present invention. In the drawing, the same reference numerals as in FIG. 7 denote the same components.

Numeral 11 denotes a sheave unit. As shown in detail in FIGS. 4 to 6, the sheave unit 11 is provided on each of the left and right sides (C and D sides shown in FIG. 1) of the upper surface of the trolley 6. A pair of rails 1 laid in the transverse direction
Two movable frames 14, 15 provided at four corners of the trolley 6 so as to be able to move in the traversing direction and connected in the moving direction, with wheels 13 capable of rolling on Body 1
Each of 4 and 15 has two lifting rope sheaves 18 each of which is pivotally supported by a shaft 16 extending substantially horizontally in a direction perpendicular to the transverse direction of the trolley 6 and around which a lifting equipment lifting rope 17 is wound. .

Reference numeral 19 denotes a moving rope sheave. The moving rope sheave 19 is connected to one end of the trolley 6 (B in FIG. 1).
The upper and lower sides of the trolley 6 are pivotally supported by the shafts 20 extending at a required inclination angle with respect to the upper surface of the trolley 6 to turn the moving ropes 24 and 25 from both sides of the trolley 6 to one end. Is provided so as to be able to face the drum 23.

Numeral 21 denotes a sheave for a balancing rope. The sheave for a balancing rope 21 is the other end of the trolley 6 (A in FIG. 1).
The left and right sides of the balancing rope 2 are pivotally supported by shafts 22 extending in a direction substantially perpendicular to the upper surface of the trolley 6 on the left and right sides of the trolley 6.
The trolley 6 is provided so that it can be turned from both sides to the other end.

Reference numeral 23 denotes a drum. The drum 23 is disposed at a substantially central portion in the width direction of one end (the side B in FIG. 1) of the trolley 6, and is provided at both ends of a rope groove of the drum 23, respectively. The drum 23 is fixed at the base end and extends along the rope groove.
Motor 26 that has two moving ropes 24 and 25 wound around the motor and can rotate the drum 23 in both forward and reverse directions.
Is fixed to the output shaft.

The drum 23 is configured to take up the right-hand moving rope 25 when rotating in the direction in which the left-hand moving rope 24 is drawn out, and to wind up the left-hand moving rope 24 when rotating in the direction in which the right-hand moving rope 25 is drawn out. Have been.

The left moving rope 24 extending to the left side (C side in FIG. 1) of the moving ropes 24 and 25 is wound around the moving rope sheave 19 disposed on the left side of the trolley 6 and is positioned on the left side of the trolley 6. The sheave unit 1 which is turned so as to follow and the extension end thereof is arranged on the left side of the trolley 6.
One moving frame 15 is locked to one end (the B side in FIG. 1).

The right moving rope 25 extending to the right side of the trolley 6 is wound around the moving rope sheave 19 arranged on the right side of the trolley 6 and is turned along the right side of the trolley 6, and its extension end is at the right side of the trolley 6. One side of the moving frame 15 of the sheave unit 11 arranged at the side (B side in FIG. 1)
Locked to the end.

Further, the other ends of the movable frames 14, 14 at the other end of the trolley 6 of each sheave unit 11 are connected via a balancing rope 27, and an intermediate portion of the balancing rope 27 is provided. Is wound around each of the balancing rope sheaves 21 and 21 disposed on the left and right of the other end (A side in FIG. 1) of the trolley 6.

Hereinafter, the operation of the suspension device of the present embodiment shown in FIGS. 1 to 6 will be described.

For example, the left moving rope 24 is connected to the drum 23
When the gear motor 26 is operated in the rotation direction in which the right moving rope 25 is unwound from the drum 23, the sheave unit 1 on the left side of the trolley 6 (the C side in FIG. 1).
1 is displaced toward one end (the B side in FIG. 1) of the trolley 6, and the displacement of the sheave unit 11 on the left side of the trolley 6 is changed via the balancing rope 27 on the right side (the D side in FIG. 1). The sheave unit 11 is transmitted to the sheave unit 11, and the sheave unit 11 on the right side of the trolley 6 is displaced toward the portion near the other end (the A side in FIG. 1) of the trolley 6 according to the amount of movement of the sheave unit 11 on the left side.

Thus, each of the sheave units 11, 11
Since the upper part of the hanging portion of the lifting / lowering rope 17 wrapped around the lifting rope sheave 18 pivotally supported by the head block 7 can be pulled in the moving direction of the respective sheave units 11, 11, the head block 7 and the spreader 9
(See FIG. 7) The swing of the hanging tool in the clockwise turning direction can be easily suppressed.

When the right-hand moving rope 25 is wound around the drum 23 and the gear motor 26 is operated in the rotation direction in which the left-hand moving rope 24 is unreeled from the drum 23, the sheave unit on the right side of the trolley 6 (D side in FIG. 1). 11
Is displaced toward a portion closer to one end (the B side in FIG. 1) of the trolley 6, and the displacement of the sheave unit 11 on the right side of the trolley 6 is changed by the balance rope 27 to the sheave on the left side (the C side in FIG. 1). The sheave unit 11 on the left side of the trolley 6 is displaced in accordance with the amount of movement of the right sheave unit 11 toward a portion closer to the other end (the B side in FIG. 1) of the trolley 6.

As a result, each sheave unit 11, 11
Since the upper part of the hanging portion of the lifting / lowering rope 17 wrapped around the lifting rope sheave 18 pivotally supported by the head block 7 can be pulled in the moving direction of the respective sheave units 11, 11, the head block 7 and the spreader 9
(See FIG. 7) The swing of the hanging tool in the counterclockwise turning direction can be easily suppressed.

As described above, in the lifting device steadying device shown in FIGS. 1 to 6, the lifting rope sheave 1 which is disposed on the left and right of the trolley 6 and around which the lifting device lifting rope 17 is wound.
The sheave units 11 and 11 that pivotally support the shaft 8 are quickly displaced according to the swinging direction of the swing of the spreader 9 or the like so that the amount of movement is equal to the direction opposite to the swinging direction. Influence, deviation of the position of the center of gravity of the container 8 due to the loading state of the cargo, and swinging of the head block 7 and the spreader 9 in the turning direction due to rapid acceleration / deceleration of the trolley 6 are easily suppressed, and the container 8 is unloaded. The efficiency of work and loading work can be improved.

It should be noted that the suspension device of the present invention is not limited to the above-described embodiment, and it goes without saying that various changes can be made without departing from the spirit of the present invention.

[0026]

As described above, according to the hanging device of the present invention, the displacement of the left sheave unit when the left moving rope is wound on the drum is controlled by the right sheave unit by the balancing rope. The displacement of the right sheave unit when the right moving rope is wound on the drum is transmitted to the left sheave unit by the balancing rope so that the movement amounts of the two sheave units in different directions are equal. Therefore, an excellent effect that the swing in the turning direction of the hanger can be easily suppressed via the hanger elevating rope wound around the elevating rope sheave of the sheave unit can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view of a trolley illustrating an example of an embodiment of a hanging device of the present invention.

FIG. 2 is a side view of the trolley associated with FIG. 1;

FIG. 3 is a front view of the trolley related to FIG. 1;

FIG. 4 is a plan view of a sheave unit related to FIG. 1;

FIG. 5 is a side view of the sheave unit related to FIG. 1;

FIG. 6 is a view taken in the direction of arrows VI-VI in FIG. 5;

FIG. 7 is a side view of an example of a container crane.

[Explanation of symbols]

 Reference Signs List 6 Trolley 11 Sheave unit 17 Lifting rope elevating rope 18 Sheave for lifting rope 19 Sheave for moving rope 21 Sheave for balancing rope 23 Drum 24 Left moving rope 25 Right moving rope 26 Geared motor (drive source) 27 Balancing rope

Claims (1)

[Claims] 1. A sheave unit that is attached to each of the left and right sides of the trolley so as to reciprocate in the trolley traverse direction and pivotally supports a sheave for a lifting rope around which a lifting device lifting rope is wound, and one end of the trolley. A moving rope sheave pivotally supported on each side of the trolley and capable of turning the rope from both sides of the trolley to one end, and a rope supported on the left and right sides of the other end of the trolley and connecting the rope from both sides of the trolley, respectively. A balancing rope sheave that can be turned along the other end, a drum that winds up the right-hand moving rope when unwinding the left-hand moving rope, and a drum that winds the left-hand moving rope when unwinding the right-hand moving rope, A drive source for rotating in both forward and reverse directions, the drum is provided at the center of one end of the trolley, and the left moving rope is extended to one end of the left sheave unit. The right end of the right moving rope is locked at one end of the right sheave unit, and the middle part of the right moving rope is locked at one end of the left moving rope. Is wound around the right moving rope sheave, the other ends of the respective sheave units are connected via a balancing rope, and an intermediate portion of the balancing rope is wound around the balancing rope sheave. Hanging device steady rest device.