JP2007045560A - Rope trolley type crane gear - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rope trolley type crane gear for allowing easy maintenance of a traverse wire by reducing force on a trolley and a sub trolley in the direction of approaching each other. <P>SOLUTION: The crane gear comprises first and second wire ropes 29, 33, 31, 35 from which a bucket 7 is suspended, drums 23, 25 for winding or unwinding the first and second wire ropes 29, 33, 31, 35, and a main sheave 13 and a sub sheave 17 movably arranged. The first wire ropes 29, 33 are guided from the bucket 7 to the main sheave 13, the sub sheave 17 and drums 23, 25 in sequence. The second wire ropes 31, 35 from the bucket 7 are wound on the main sheave 13 and then guided to the opposite side to the sub sheave 17, and they are wound on the sub sheave 17 at the opposite side to the main sheave 13 or wound on the sub sheave 17 and then guided to the opposite side to the main sheave 13 and to the drums 23, 25. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rope trolley crane apparatus.

In a harbor, various crane devices are used to land a cargo transported by ship. Of these, ore, industrial raw materials, cement, and grains such as grains that are stored and transported in the ship's hold etc. are indeterminate, and such cargoes (bulk loads) are unloaded in batch mode. A rope trolley type crane device is known as an unloader device (see, for example, Patent Document 1).
JP 2003-267658 A (2nd page, FIG. 3 etc.)

  The above-mentioned Patent Document 1 discloses a configuration of a rope trolley type rope trolley type crane device in which a hoisting drum for hoisting and lowering a bucket is provided in a machine room. In the rope trolley type crane apparatus, a compensation trolley is provided to prevent the bucket from moving up and down as the main trolley traverses. Although not shown, a traversing wire for traversing the main trolley is usually provided.

In the rope trolley type crane apparatus configured as described above, when a bulk load is held on a bucket and suspended, tension acts on the winding wire that suspends the bucket. Due to the tension of the winding wire, a force in the direction toward the compensation trolley acts on the sheave wound with the winding wire in the main trolley, and a force in the direction toward the main trolley acts on the sheave wound with the winding wire in the compensation trolley. .
These forces are supported by a plurality of traversing wires fixed at one end to the main trolley and the compensation trolley. Therefore, the main trolley or the like is prevented from traversing by hanging the bulk load.

  However, in this configuration, since a large load is applied to the traversing wire, there is a problem that the traversing wire is damaged quickly and the frequency of exchanging the traversing wire must be increased.

  In addition, unlike a wound wire that can be easily replaced using a messenger wire, there is a problem that a transverse wire is difficult to replace. In particular, when the diameter of the traversing wire is increased in accordance with the load applied to the traversing wire, there is a problem that the replacement work becomes more difficult.

  The present invention was made to solve the above-described problem, and when the bulk load or the like is suspended, the main trolley and the auxiliary trolley act on the main trolley and the auxiliary trolley to reduce the force in the approaching direction, An object of the present invention is to provide a rope trolley type crane apparatus that can facilitate maintenance of a traversing wire.

In order to achieve the above object, the present invention provides the following means.
The rope trolley crane apparatus of the present invention winds the bucket that can be freely opened and closed, the first wire rope and the second wire rope that suspend the bucket, the first wire rope, and the second wire rope. An unwinding drum; a main sheave that moves in a direction intersecting the suspension direction of the bucket; and a supplementary sheave that moves in the same direction as the main sheave. The main sheave and the supplementary sheave are wound from the bucket in this order and then guided to the drum, and the second wire rope is wound on the main sheave from the bucket and then opposite to the supplementary sheave. And is wound around the auxiliary sheave from the opposite side to the main sheave, or after being wound around the auxiliary sheave and led to the opposite side with respect to the main sheave. Characterized in that it is guided in the ram.

  According to the present invention, by winding the second wire rope around the main sheave and then guiding it in the opposite direction with respect to the auxiliary sheave, the direction of the force acting on the main sheave by the first wire rope, The direction of the force acting on the main sheave can be reversed by the wire rope.

  Further, the second wire rope is wound around the auxiliary sheave from the opposite side to the main sheave, or the second wire rope is wound around the auxiliary sheave and then guided to the opposite side with respect to the main sheave, so that the first sheave is used as the complementary sheave. The direction of the force acting on the auxiliary sheave and the direction of the force acting on the complementary sheave can be made opposite to each other by the second wire rope.

  That is, the forces acting on the main sheave and the auxiliary sheave are balanced, and generation of a force that causes the main sheave and the auxiliary sheave to approach each other can be prevented. As a result, for example, when the traversing wire rope is used to move the main sheave and the auxiliary sheave, the load applied to the traversing wire rope can be reduced, and its life can be extended. Moreover, a wire rope with a small diameter can be used for the traversing wire rope, and the traversing wire rope can be easily replaced.

  In the above invention, the first sheave provided on the opposite side of the auxiliary sheave with respect to the main sheave, and the second sheave provided on the opposite side of the main sheave with respect to the complementary sheave. And the first wire rope is wound from the bucket to the main sheave and the complementary sheave in this order and then guided to the drum, and the second wire rope is guided from the bucket to the main sheave, It is desirable that the first sheave, the second sheave, the auxiliary sheave, and the second sheave are wound in this order before being guided to the drum.

According to the present invention, by winding the second wire rope around the main sheave and then winding it around the first sheave, the direction of the force acting on the main sheave by the first wire rope and the main force by the second wire rope. The direction of the force acting on the sheave can be reversed.
Further, by winding the second wire rope in the order of the first sheave, the second sheave, the supplementary sheave, and the second sheave, the direction of the force acting on the supplementary sheave by the first wire rope, and the second wire rope This makes it possible to reverse the direction of the force acting on the complementary sheave.

  In the above invention, the first wire rope is a first winding wire rope that suspends the bucket, and a first opening and closing wire rope that opens and closes the bucket, and the second wire rope is: It is desirable that they are a second winding wire rope that suspends the bucket and a second opening and closing wire rope that opens and closes the bucket.

  According to the present invention, the first wire rope and the second wire rope are respectively connected to the first winding wire rope and the second wire rope that suspend the bucket, and the first opening and closing wire rope and the first wire rope that open and close the bucket. By comprising the two open / close wire ropes, the bucket can be lifted and hung and the bucket can be reliably opened and closed.

  According to the rope trolley type crane apparatus of the present invention, the second wire rope is wound around the main sheave and then guided in the opposite direction to the auxiliary sheave, and the second wire rope is guided from the opposite side to the main sheave. Or by winding the auxiliary sheave and then guiding it to the opposite side of the main sheave, the forces acting on the main trolley and the auxiliary trolley in the approaching direction can be reduced. There is an effect that the maintenance can be facilitated.

A rope trolley type crane apparatus according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a diagram illustrating an overall configuration of an embodiment of a rope trolley crane apparatus according to the present invention.
A rope trolley type crane device (hereinafter referred to as a crane device) 1 described in the present embodiment is used as an unloader device that unloads bulk cargo such as ore from a ship anchored on the sea of a harbor to a land receiving facility. It is what.

As shown in FIG. 1, the crane device 1 includes a traverse beam 3 supported on the land side and projecting a tip portion toward the sea side, and a trolley 5 that reciprocates (transverses) horizontally along the traverse beam 3. And a bucket 7 that is suspended from the trolley 5 and moves up and down, and a machine room 9 in which devices for controlling the traversing of the trolley 5 and the vertical movement of the bucket 7 are housed.
Further, on the land side of the crane device 1, a hopper 11 into which the unloaded bulk load is input is provided.

FIG. 2 is a schematic diagram illustrating the arrangement of wire ropes and the like in the crane apparatus of FIG.
As shown in FIG. 1 or FIG. 2, the crane device 1 is arranged at the main sheave 13 arranged on the trolley 5, the auxiliary sheave 17 arranged on the auxiliary trolley 15, and the sea side end of the transverse beam 3. In addition, a first sheave 19, a second sheave 21 disposed at the land end, a winding drum (drum) 23, an open / close drum (drum) 25, and a traverse drum 27 disposed in the machine chamber 9 are provided. .

FIG. 3 is a diagram for explaining a specific example of the wire rope arrangement related to the raising and lowering of the bucket in FIG. 2.
As shown in FIGS. 2 and 3, a first winding wire rope (first wire rope) 29 and a second winding wire rope (second wire rope) 31 are wound around the winding drum 23. The winding wire ropes 29 and 31 are wound and unwound by the rotation of the winding drum 23.
A first open / close wire rope (first wire rope) 33 and a second open / close wire rope (second wire rope) 35 are wound around the open / close drum 25, and the open / close wire ropes 33 and 35 are wound around the open / close drum 25. It is configured to be wound and unwound by rotation of.

The first winding wire rope 29 and the first opening / closing wire rope 33 are wound around the guide sheaves 37 and 38 from the winding drum 23 and the opening / closing drum 25, respectively, and then wound in the order of the auxiliary sheave 17 and the main sheave 13. 7
The second winding wire rope 31 and the second opening / closing wire rope 35 are wound around the guide sheaves 37 and 38 from the winding drum 23 and the opening / closing drum 25, respectively, and then the second sheave 21, the supplementary sheave 17, and the second sheave 21. The first sheave 19 and the main sheave 13 are wound in this order and then guided to the bucket 7.

FIG. 4 is a diagram for explaining a specific example of the wire rope arrangement according to the traversing of the trolley in FIG. 2.
2 and 4, the first traversing wire rope 39 and the second traversing wire rope 41 are wound around the traversing drum 27, and the traversing wire ropes 39, 41 are rotated by the traverse drum 27. It is configured to be wound and unwound.
The first traversing wire rope 39 is wound around the first sheave from the traversing drum 27, and its end is fixed to the trolley 5. The second traversing wire rope 41 is wound from the traversing drum 27 in the order of the second sheave 21 and the supplementary sheave 17, and its end is fixed to the traversing beam 3.
In addition, a compensation wire rope 43 whose both ends are fixed to the transverse beam 3 and the trolley 5 is provided, and the compensation wire rope 43 is wound around the compensation sheave 45 of the auxiliary trolley 15.

FIG. 5 is a schematic diagram for explaining a configuration of a bucket in the crane apparatus of FIG. 1.
As shown in FIG. 5, the bucket 7 is generally configured by a pair of gripping portions 47 that grip a bulk load and a pair of opening and closing sheaves 49 and 50 that open and close the gripping portion 47.
The grip portion 47 is configured to be openable and closable around a rotation shaft, and one opening and closing sheave 49 is disposed on the rotation shaft so that the rotation shaft and the rotation shaft coincide with each other. Further, the end of each gripping portion 47 and the other opening / closing sheave 50 or the holding portion 51 that holds the other opening / closing sheave 50 are connected by a wire rope.

The ends of the first winding wire rope 29 and the second winding wire rope 31 are fixed to the other opening / closing sheave 50 or the holding portion 51 that holds the other opening / closing sheave 50.
The first opening / closing wire rope 33 and the second opening / closing wire rope 35 are wound around the pair of opening / closing sheaves 49 and 50.

Next, the effect | action in the crane apparatus 1 which consists of said structure is demonstrated.
First, the operation of the bucket 7 will be described.
As shown in FIGS. 2 and 3, the winding and lowering of the bucket 7 are performed by simultaneously rotating the winding drum 23 and the opening / closing drum 25, respectively, and the first and second winding wire ropes 29 and 31 and the first and first winding ropes, respectively. The two open / close wire ropes 33 and 35 are wound and unwound.
The bucket 7 is opened and closed by rotating the opening and closing drum 25 and winding up and unwinding the first and second opening and closing wire ropes 33 and 35.

  That is, by winding up the first and second open / close wire ropes 33, 35, the distance between the pair of open / close sheaves 49, 50 is reduced. The pair of gripping portions 47 are closed with their pivot shafts pulled upward. On the other hand, when the first and second opening and closing wire ropes 33 and 35 are unwound, the distance between the pair of opening and closing sheaves 49 and 50 increases. In addition, the gripping portion 47 may be acted on by a force that spreads the gripping portion 47 due to the load of the internal bulk load. By unwinding the first and second open / close wire ropes 33 and 35, the bucket 7 Opens.

Next, the traversing operation of the trolley 5 and the auxiliary trolley 15 will be described.
When the traverse drum 27 is rotated to wind the first traverse wire rope 39 and the second traverse wire rope 41 is unwound, the trolley 5 and the auxiliary trolley 15 are moved to the first sheave as shown in FIGS. It is rampant to 19 side.
Since the end of the first traversing wire rope 39 is fixed to the trolley 5 and the second traversing wire rope 41 is wound around the auxiliary sheave 17 of the auxiliary trolley 15, the auxiliary trolley 15 Approximately half the speed.
When the traverse drum 27 is rotated in the reverse direction, the first traverse wire rope 39 is wound and the second traverse wire rope 41 is unwound, and the trolley 5 and the auxiliary trolley 15 are traversed toward the second sheave 21 side. The

Next, the balance of force in the trolley 5 and the auxiliary trolley 15 that is a feature of the present embodiment will be described.
When a bulk load is held on the bucket 7 and the bucket 7 is lifted, tension is applied to the first and second wound wire ropes 29 and 31 and the first and second open / close wire ropes 33 and 35.
The first winding wire rope 29 and the first opening / closing wire rope 33 are wound around the main sheave 13 and extend toward the auxiliary sheave 17. On the other hand, the second winding wire rope 31 and the second opening / closing wire rope 35 are wound around the main sheave 13 and extend toward the first sheave 19.
Therefore, a force in the direction of the complementary sheave 17 is applied to the main sheave 13 by the first winding wire rope 29 and the first opening / closing wire rope 33, and the second winding wire rope 31 and the second opening / closing wire rope 35 The force in the direction of the first sheave 19 works. Since these forces are substantially the same magnitude and work in opposite directions, the forces acting on the main sheave 13 are substantially balanced.

The first sheave wire rope 29 and the first opening / closing wire rope 33 are wound around the auxiliary sheave 17 from the main sheave 13 and extend toward the guide sheave 38. Further, the second sheave wire rope 41 and the second opening / closing wire rope 35 are wound around the auxiliary sheave 17 from the second sheave 21 and extend toward the second sheave 21 again.
Therefore, the first sheave wire rope 29 and the first opening and closing wire rope 33 act on the auxiliary sheave 17 in the direction of the main sheave 13, and the second winding wire rope 31 and the second opening and closing wire rope 35 The force in the direction of the second sheave 21 works. Since these forces act in the opposite direction with substantially the same magnitude, the forces acting on the complementary sheave 17 are substantially balanced.

  According to said structure, the force which acts in the main sheave 13 and the auxiliary sheave 17 balances, and generation | occurrence | production of the force in which the main sheave 13 and the auxiliary sheave 17 approach mutually can be prevented. As a result, it is possible to reduce the load applied to the first and second traversing wire ropes 39 and 41 that traverse the trolley 5 in which the main sheave 13 is disposed and the auxiliary trolley 15 in which the complementary sheave 17 is disposed. Can be extended. Further, a wire rope having a small diameter can be used for the first and second traversing wire ropes 39 and 41, and the exchange of the first and second traversing wire ropes 39 and 41 can be facilitated.

  In particular, when the crane apparatus 1 is large (for example, a crane apparatus having a capacity of 3000 tons / hour), the life extension and diameter are reduced by reducing the load applied to the first and second traversing wire ropes 39 and 41. The effect of facilitating the replacement of the first and second traversing wire ropes 39 and 41 due to the use of the thin wire ropes for the first and second traversing wire ropes 39 and 41 becomes remarkable.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above-described embodiment, the description is applied to the configuration using two wound wire ropes and two open / close wire ropes, but the present invention is not limited to the configuration using two wound wire ropes and two open / close wire ropes. The present invention can be applied to a configuration in which more wire ropes are used as a wound wire rope and an open / close wire rope.

  Further, in the above embodiment, the trolley 5 and the auxiliary trolley 15 are described as being applied to a rope trolley type crane apparatus that is operated by the first and second transverse wire ropes 39 and 41. However, the present invention is not limited to the rope trolley type crane apparatus. Therefore, the present invention can be applied to a semi-rope trolley type crane apparatus in which the traversing wire rope is eliminated and the traversing apparatus is disposed on the trolley 5 and the auxiliary trolley 15.

It is a figure explaining the whole structure of one Embodiment in the rope trolley type crane apparatus of this invention. It is a schematic diagram explaining arrangement | positioning of a wire rope etc. in the crane apparatus of FIG. It is a figure explaining the specific example of the wire rope arrangement | positioning which concerns on the bucket raising / lowering of FIG. It is a figure explaining the specific example of the wire rope arrangement | positioning which concerns on the traversal of the trolley of FIG. It is a schematic diagram explaining the structure of the bucket in the crane apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Crane apparatus 7 Bucket 13 Main sheave 17 Supplementary sheave 19 First sheave 21 Second sheave 23 Winding drum (drum)
25 Opening and closing drum (drum)
29 First wire rope (first wire rope)
31 Second wire rope (second wire rope)
33 First open / close wire rope (first wire rope)
35 Second open / close wire rope (second wire rope)

Claims (3)

An openable and closable bucket,
A first wire rope and a second wire rope that suspend the bucket;
A drum for winding and unwinding the first wire rope and the second wire rope;
A main sheave that moves in a direction intersecting the suspension direction of the bucket;
A complementary sheave that moves in the same direction as the main sheave,
The first wire rope is wound from the bucket to the main sheave and the supplementary sheave in this order and then guided to the drum.
The second wire rope is wound from the bucket to the main sheave and then guided to the opposite side of the auxiliary sheave;
It is wound around the auxiliary sheave from the opposite side to the main sheave, or is wound around the complementary sheave and then guided to the opposite side with respect to the main sheave before being guided to the drum. Rope trolley type crane equipment. A first sheave provided on the opposite side of the auxiliary sheave with respect to the main sheave;
A second sheave provided on the opposite side of the main sheave with respect to the complementary sheave;
The first wire rope is wound from the bucket to the main sheave and the supplementary sheave in this order and then guided to the drum.
The second wire rope is led from the bucket to the drum after being wound in the order of the main sheave, the first sheave, the second sheave, the auxiliary sheave, and the second sheave. The rope trolley crane apparatus according to claim 1. The first wire rope is a first winding wire rope that suspends the bucket, and a first opening and closing wire rope that opens and closes the bucket,
The rope trolley according to claim 1 or 2, wherein the second wire rope is a second winding wire rope that suspends the bucket and a second opening and closing wire rope that opens and closes the bucket. Crane equipment.

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