JP2001072378A - Cable storing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely store a cable in a cable basket or smoothly deliver the cable from the cable basket without replacing or changing the position of a guide ring even if the rising speed of a head block is increased. SOLUTION: In this cable storing device in which a cable 6 is stored in a cable basket 9 carried on a head block 4 capable of freely elevating, or the cable 6 is delivered from the cable basket 9, a sprocket 20 having a cable 6 fixed to an axis part is rotatably provided to apply torque in the direction of winding the cable 6 or in the direction of delivering the cable 6 when the head block 4 is elevated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable storage device.

[0002]

2. Description of the Related Art FIGS. 3 and 4 show an example of a container crane.
A trolley 2 traversing along the girder 1, a head block 4 suspended from the trolley 2 via a wire 3 for raising and lowering, and a spreader for locking a container attached to a lower portion of the head block 4. The head block 4 is provided with a spreader 5 by winding or unwinding the lifting wire 3 by a lifting drum (not shown).
It can be ascended and descended together.

[0003] From an electric room provided at a predetermined position of a container crane, a curtain cable 6 'for power supply extends to a trolley 2 along a girder 1a and an up-and-down boom 1b, and is connected to the cable 6 at the trolley 2. The cable 6 connected to the curtain cable 6 'is a trolley 2
Is fixed to the head block 4 below the trolley 2 and connected to various devices such as a pump driving motor of a hydraulic unit mounted on the head block 4. By energizing the cable 6 from the power supply on the electric room side via the curtain cable 6 ',
Power can be supplied to various devices installed in the head block 4.

The length of the cable 6 is set between the trolley 2 and the head block 4 in accordance with the maximum descending distance of the head block 4 with respect to the trolley 2. A cable storage device is provided for sequentially storing or unwinding the cables 6 from the head block 4 side with the rise and fall of the cable.

FIGS. 5 and 6 show an example of a conventional cable housing device. This cable housing device is provided on a head block 4 and has a bottomed cylindrical basket body 7 having an open upper end; And a cable basket 9 having a basket upper frame 8 provided at the upper part of the basket body. Further, a cone 10 formed in a tapered shape whose outer shape gradually decreases upward is provided at an inner lower part of the basket body 7. It is fixed concentrically with the basket body 7.

The basket upper frame 8 is attached to the outer periphery of the upper end opening of the basket main body 7 at substantially equal intervals in the circumferential direction, and gradually increases in the radial direction of the basket main body 7 as it goes upward from the basket main body 7. Four pillars 11 which are inclined toward the center side, are inclined at an intermediate portion in the height direction, and gradually extend outward in the radial direction of the basket main body 7 as going further upward, are juxtaposed in the circumferential direction. Ring-shaped members 12 and 1 for connecting and fixing the upper end portion, the inverted portion, and the predetermined portion of the lower portion of the column 11 in the circumferential direction and reinforcing the column 11.
3 and 14.

The axes of the ring-shaped members 12, 13, and 14 are located on the same axis as the axis of the cone 10, and the ring-shaped members 12, 13 provided at the upper end of the column 11 and the inverted portion are provided. Numeral 13 serves as a ring for guiding the cable 6 at the same time as reinforcing the basket upper frame 8.

At a position below the inner ring-shaped member 14 in the basket upper frame 8, a guide ring 15 whose axis is located on the same axis as the cone 10 and has a required inner diameter can guide the cable 6. Installed.

In the cable storage device shown in FIGS. 5 and 6, when the head block 4 is raised, the cable 6 is guided by the ring-shaped members 12 and 13 and the guide ring 15 due to the elastic force of the cable 6 itself and its own weight. When the head block 4 is lowered in the center of the cone 10 into the inside of the cable 9 and the head block 4 is lowered, the cables 6 stored in the cable basket 9 are gradually straightened from the hollow shape and are drawn out.

[0010]

In recent years, container cranes have been increased in size and the distance of elevating and lowering (head) the head block 4 has been increased. For this reason, the speed of elevating the head block 4 with respect to the trolley 2 has been increased to increase the load handling cycle. Attempts are being made to shorten it.

However, if the rising speed of the head block 4 exceeds about 150 m / min, the swing in the hanging portion of the cable 6 becomes excessive, and the like.
The cable 6 to be stored in the cable basket 9 is
The cable 6 is not satisfactorily guided by the ring-shaped members 12 and 13 and the guide ring 15, and the cable 6 is not stored well in the outer periphery of the cone 10 and bends. May cause damage such as cutting.

In recent years, in order for the cable 6 to be well accommodated in the outer periphery of the cone 10 of the cable basket 9, the cable 6 is guided by the ring-shaped members 12, 13 and the guide ring 15 and inclined toward the outer periphery of the cone 10. The angle (the deflection angle of the cable 6) is important, and it is effective to change the inclination angle of the cable 6 depending on the properties (e.g., bendability) of the cable 6 and the speed at which the cable 6 is stored. I understand.

For this reason, conventionally, as the size and speed of the container crane have increased, the guide ring 15 has to be replaced with one having a different diameter or the ring-shaped member 1 has been replaced.
Countermeasures are taken such as changing the vertical position of the guide rings 15, 13 and the guide ring 15, changing the number of installation steps of the ring-shaped members 12, 13 and the guide ring 15, and changing the shape of the cone 10. Like that.

However, as described above, the ring-shaped member 1
2 and 13 and the guide ring 15 are replaced with ones having different diameters, or the ring-shaped members 12 and 13 and the
It is very difficult to change the vertical position of the cable 5 and to change the number of steps for installing the ring-shaped members 12 and 13 and the guide ring 15.
If the cable is not properly accommodated in the cable basket 9, there is a problem that it is necessary to repeat the above-mentioned change operation and the like again.

The present invention has been made in view of the above-mentioned circumstances, and even when the ascending / descending distance of the head block is large and the ascending speed is higher than before, the diameter of the ring-shaped member or the guide ring and the vertical position are changed, or It is an object of the present invention to ensure that the cable can be stored in a cable basket without changing the number of steps of setting the shape member and the guide ring.

[0016]

According to a first aspect of the present invention, there is provided a cable storage device which is mounted on a head block which moves up and down with respect to a trolley of a crane and has a cylindrical basket having an open upper end. A cable basket consisting of a main body and a basket upper frame fixed to the upper part of the basket main body, a guide ring provided inside the basket upper frame, and a cone arranged at a lower part inside the basket main body; As the cable that extends to the block is housed in a cable-shaped manner around the cone as the head block rises, the cable that is housed inside the cable basket moves down the head block. Along with, in the cable storage device configured to be extended upward,
A means is provided for applying torque in the same direction as the direction in which the cable is wound on the cable wound and stored in the cable basket in a coiled shape in response to the elevation of the head block.

According to a second aspect of the present invention, there is provided a cable storage device which is mounted on a head block which moves up and down with respect to a trolley of a crane and has a cylindrical basket body having an open upper end and a basket fixed to an upper portion of the basket body. A cable basket consisting of an upper frame, a guide ring provided inside the basket upper frame, and a cone arranged in the lower part of the inside of the basket main body.The cable extending from the trolley to the head block raises the head block. Along with the cable basket, the cable is stored inside the cable basket around the cone, and the cable stored inside the cable basket is extended upward as the head block descends. In the cable storage device described above, the cable basket is accommodated corresponding to the elevation of the head block. Is provided with a means for imparting a direction and torque in the same direction fed out direction or the cable is wound on the cable fed from wound housed or cable basket coil-shape and.

According to the cable storage device of the present invention, the cable can be placed in the middle without changing the diameter or the vertical position of the ring-shaped member or the guide ring, or changing the number of stages of the ring-shaped member or the guide ring. Without being bent at the outer periphery of the cone in the cable basket, or being fed upward.

[0019]

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

FIG. 1 shows an embodiment of a cable storage device according to the present invention. The cable basket 9 itself may have the same structure as that shown in FIGS.

Thus, in the embodiment of the present invention,
When the head block 4 is moved up and down by an elevating winch (not shown), a linear portion of the cable 6 located between the trolley 2 and the head block 4 that is not wound in a coiled shape is connected to the trolley 2 and the head block. The cable 6 is rotated relative to the axis of the cable 6 so as to apply a torque to the cable 6 in accordance with the lift H between them, thereby preventing the cable 6 from being improperly twisted.

That is, the cylindrical frame 1 installed on the trolley 2
A radial bush 18 having an upper end integrally attached with a thrust bush 17 supported on the upper surface of the cylindrical frame 16 is fitted into the hollow portion of the cylindrical bush 6, and a hollow cylindrical body 19 is fitted in the radial bush 18. It is rotatably fitted.

The hollow cylindrical body 19 is provided with a flange 19a mounted on the upper surface of the cylindrical frame 16 at the upper end, and the lower surface of the flange 19a is slidably supported on the upper surface of the thrust bush 17. In the axis of the body 19,
The cable 6 accommodated in the cable basket 9 hangs down substantially linearly when the head block 4 goes up, or the cable 6 drawn out from the cable basket 9 hangs up and down so that it can go down almost vertically when the head block 4 goes down. A hollow hole 19b is formed.

A horizontally arranged sprocket 20 is fixedly mounted on the upper surface of the flange 19 a of the hollow cylindrical body 19, and a hollow hole 20 a communicating with the hollow hole 19 b of the hollow cylindrical body 19 is provided on the axis of the sprocket 20. Has been drilled.

The cable 6 which is accommodated in or out of the cable basket 9 when the head block 4 is moved up and down by the lower portion of the trolley 2 has a hollow hole 19b of the hollow cylindrical body 19 and a hollow hole of the sprocket 20. The cable 6 is fixed to the sprocket 20 by clamping means 21. The cable 6 is fixed to the sprocket 20 by a clamp ring 21.

The trolley 2 is provided with a speed reducer 23 which can be driven by the electric motor 22.
An endless chain 25 is stretched between the sprocket 24 and the sprocket 20 which are externally fitted to the third vertical shaft 23a.

An encoder 2 is mounted on a shaft 23a of the speed reducer 23.
6 is connected, and the rotational speed signal 27 of the shaft 23a detected by the encoder 26 can be given to the arithmetic and control unit 28. The arithmetic and control unit 28 gives the electric motor 22 a speed adjustment command 29. I am getting it. Although not shown, for example, the hoisting drive device is provided with a height position detector for the head block 4 with respect to the trolley 2, and the height position signal of the head block 4 detected by the height position detector is provided. Numeral 30 can be provided to the arithmetic and control unit 28.

Next, the operation of the cable storage device shown in FIG. 1 will be described.

When the head block 4 is moved up and down, the electric motor 22 is driven. Therefore, the sprocket 20 rotates with respect to the horizontal plane via the speed reducer 23, the sprocket 24, and the endless chain 25, and
Is applied in the counterclockwise direction or the clockwise direction.

For example, when the head block 4 is raised, a torque is applied to the cable 6 in the counterclockwise direction. Therefore, the cable 6 is guided by the ring-shaped members 12 and 13 and the guide ring 15 shown in FIG. It is wound and stored in the shape of a spine.

When the head block 4 is lowered, the cable 6 housed in the cable basket 9 is fed upward while applying a torque in the clockwise direction B to the cable 6.

As described above, when the torque is applied to the cable 6 when the head block 4 is moved up and down, the sprocket 2 is used.
Control is performed so that the number of rotations of 0, that is, the relationship between the amount of rise of the head block 4 and the number of turns of the cable 6 is as described below.

For example, when the diameter of the winding of the cable 6 housed in the cable basket 9 in the form of a coil when the head block 4 is raised is D, the length of one winding of the cable 6 is πD. Become. Therefore, the control is performed so that the cable 6 is wound once when the rising amount of the head block 4 is πD.

For this reason, during operation, the rotation speed of the sprocket 24 is detected by the encoder 26 and the rotation speed signal 2
7 is input to the arithmetic and control unit 28. At the same time, a height position signal 30 detected by a height position detector (not shown) is also input to the arithmetic and control unit 28.

Thus, for example, the arithmetic and control unit 28 calculates the amount of elevation of the head block 4 based on the height position signal 30 and determines the number of turns N1 of the cable 6 to be stored in the cable basket 9 from the calculated value. Calculated and the number of turns N1
If there is a deviation ± ΔN between the actual number of turns N2 of the cable 6 calculated based on the rotation speed signal 27 from the encoder 26, a speed adjustment command 29 at a level corresponding to the deviation ± ΔN is sent to the electric motor 22. The control is performed so that the deviation ± ΔN becomes zero, that is, the amount of rise of the head block 4 and the length of the cable 6 wound in the cable basket 9 become equal.

When the head block 4 is lowered, the control is performed in the same manner as when the head block 4 is raised. In this case, when the head block 4 is lowered by .pi. , So that it is rewound.

In the present embodiment, when the cable 6 is stored in the cable basket 9 by moving the head block 4 up or down, or when the cable 6 is fed out from the cable basket 9, the cable 6 is connected to the ring-shaped members 12, 13 and the guide ring. In addition to being guided by 15, a torque is applied to the cable 6 in the same direction as the winding direction or the rewinding direction. For this reason, the head block 4
Even when the ascending / descending distance is large and the ascending speed is high, the diameter or the vertical position of the ring-shaped members 12, 13 and the guide ring 15 is changed, and the number of stages of the ring-shaped members 12, 13 and the guide ring 15 is changed. Even if the cable 6 is not bent, the cable 6 is well accommodated in the outer peripheral portion of the cone 10 in the cable basket 9 without being bent in the middle, and is smoothly fed out of the cable basket 9.

FIG. 2 shows another embodiment of the cable storage device according to the present invention. In this embodiment, a cable using pinions and gears is used without using sprockets or chains as shown in FIG. 6 is to be torqued.

In the figure, 31 is a flange 1 of the hollow cylindrical body 19.
A gear 32 fixed to the upper surface of the gear 9a is a pinion externally fitted to an output shaft 23a from the speed reducer 23, and the pinion 32 and the gear 31 mesh with each other. The cable 6 extends from a hollow hole 31 a formed in the axis of the gear 31 through the hollow cylindrical body 1.
In the figure, the same components as those shown in FIG. 1 are denoted by the same reference numerals.

With this configuration, the same operation and effect as those of the above embodiment can be obtained.

In the cable storage device of the present invention, the basket upper frame of the cable basket is
The case where the diameter is increased from the middle to the upper end is described.However, it can be applied to the one where the upper end is the most narrowed, and the torque is applied to the cable only when the head block is raised. It is also possible to apply a torque to the cable, various means other than this embodiment can be used as a means for applying a torque to the cable, and the winding direction of the cable is as shown in FIGS. Although it is wound counterclockwise as viewed from above, it can be implemented by winding it clockwise as well as, of course, various changes can be made without departing from the scope of the present invention. is there.

[0042]

As described above, according to the cable storage device of the present invention, the vertical position of the guide ring is changed, the number of stages of the guide ring is changed, and the diameter of the guide ring is different from the ring body. The cable can be easily accommodated in the outer periphery of the cone in the cable basket, or can be smoothly fed out of the cable basket without changing the shape of the cone or changing the shape of the cone. Can be achieved.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an example of an embodiment of a cable storage device of the present invention.

FIG. 2 is a schematic diagram showing another example of the embodiment of the cable storage device of the present invention.

FIG. 3 is a side view showing an example of a container crane.

4 is a view in the direction of arrows IV-IV in FIG. 3;

FIG. 5 is a side view showing an example of a general cable basket.

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

[Explanation of symbols]

 Reference Signs List 2 trolley 4 head block 6 cable 7 basket body 8 basket upper frame 9 cable basket 10 cone 15 guide ring 22 electric motor (means for applying torque) 23 reducer (means for applying torque) 24 sprocket (means for applying torque) Means) 25 Chain (means for applying torque) 27 Sprocket (means for applying torque) 31 Gear (means for applying torque) 32 Pinion (means for applying torque)

Claims (2)

[Claims] 1. A cable basket comprising: a cylindrical basket main body having an upper end opened on a head block which moves up and down with respect to a trolley of a crane; and a basket upper frame fixed to an upper portion of the basket main body; A cable extending from the trolley to the head block is provided with a guide ring provided inside the body and a cone arranged at the lower part inside the basket body. In a cable storage device configured so that the cables stored inside the cable basket and the cables stored inside the cable basket are extended upward along with the lowering of the head block, when the head block is raised, Correspondingly wound and stored in the cable basket A cable storage device comprising: means for applying torque to a cable in the same direction as the direction in which the cable is wound. 2. A cable basket comprising a cylindrical basket main body having an open upper end and being mounted on a head block which moves up and down with respect to a trolley of a crane, a basket upper frame fixed to the upper portion of the basket main body, and a basket upper frame. A cable extending from the trolley to the head block is provided with a guide ring provided inside the body and a cone arranged at the lower part inside the basket body. In a cable storage device configured so that the cables stored inside the cable basket are pulled out upward along with the lowering of the head block, Correspondingly, the cable basket is wound into a coil shape and stored or stored. A cable storage device comprising: means for applying a torque to a cable fed from a cable basket in a direction in which the cable is wound or in a direction in which the cable is fed.