JP2002087758A - Stabilizing device for unloading bucket of hold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stabilizing device for an unloading grab bucket in an unloading device for grabing a cargo out of a hold of a ship. SOLUTION: One or more fixed sheaves 14a, 14b are provided at an upper part left and right ends of a gate type bucket support frame straddling over a hold 1 and traveling in a front and rear direction, and one or more stabilizing wires 16a, 16b crossing in a vertical plane including wires 6, 7 opening and closing, rising and falling a bucket and stuck on a grab bucket at a part thereof are arranged in the surface. The stabilizing wires 16a, 16b are wound on the fixed sheaves 14a, 14b and hang more than one balance weights 15 to tense the stabilizing wires 16a, 16b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention is installed on a ship,
The grab bucket is raised and lowered and opened and closed by winding and unwinding the wire, and sand, gravel, coal,
The present invention relates to an anti-sway device for a bucket applied to a pallet unloading device for unloading or transferring bulk or powdered or granular material such as ore to a ship.

[0002]

2. Description of the Related Art There is known an unloading device for a hull in which a turning boom type grab bucket is installed at a position close to the hull, and an operator controls the turning boom type grab bucket to land the cargo in the hull. ing. It is necessary to perform complicated operations such as a boom turning operation and a grab bucket operation at the same time with this turning boom type grab bucket, and the operation requires skill. In addition, since the boom swivel range is limited, the workable area for landing is limited. In the case of a large hull, a plurality of swivel boom type grab buckets must be installed, leading to a rise in equipment costs. Furthermore, the grab bucket of the swiveling boom type moves the center of gravity of the ship largely because the boom, which is a heavy object, swivels, and the ship swings greatly, resulting in deterioration of the working environment and lowering of the working efficiency.

In order to solve such a problem, for example, Japanese Patent Application Laid-Open No. Hei 5-331875 and Japanese Patent Application Laid-Open No. 2000-21577
Japanese Unexamined Patent Publication (Kokai) No. H11-133, etc. discloses a ship tank unloading device shown in FIG. 8 and FIG. According to these unloading devices, the gate-shaped bucket support frame 2 that runs in the front-rear direction across the left and right sides of the hull 1 is provided. This support frame 2
An upper frame 9 is disposed horizontally inside the frame. One end of a bucket lifting wire 6 for raising and lowering the grab bucket 3 and one end of a bucket opening and closing wire 7 for opening and closing the bucket 3 in the longitudinal direction of the hull 1 are connected to the upper frame. 9. The other end of the bucket opening / closing wire 7 is connected to a lower frame 10 arranged in parallel below the upper frame 9.
Of the support frame 2 together with the bucket lifting wire 6 via a driven sheave (not shown) installed in the support frame 2.

Further, below the grab bucket 3,
A hopper 5 capable of traveling in the front-rear direction of the hull 1 is provided together with a feeder conveyor 4 arranged in the transverse direction of the hull 1, and the hopper 5 is moved to a first position P <b> 1 directly below the grab bucket 3, It is possible to move between the separated second position P2.

The hopper 5 is stopped when it is at the second position P2, and when there is a bulk load directly below the grab bucket 3 when unloading, the wire 6 for raising and lowering the bucket is paid out and the hopper 5 is opened. Lower it.
During this downward movement, the bucket opening / closing wire 7 is also paid out synchronously. When the grab bucket 3 rushes into a bulk load in the hull, the bucket opening / closing wire 7 is wound up to close the bucket 3, and the bulk load is grasped. Next, the bucket lifting wire 6 and the bucket opening / closing wire 7 are wound up in synchronization, and the bucket 3 is raised.

When the grab bucket 3 reaches the uppermost position, the lifting of the lifting wire 6 and the bucket opening / closing wire 7 is stopped, and at the same time, the hopper 5 is moved toward the first position P1. When the hopper 5 reaches the first position P1 and stops, the bucket opening / closing wire 7 is fed out to open the bucket 3. The bulk load in the grab bucket 3 is put into the hopper 5, dropped through the feeder conveyor 4 onto the conveyor belt conveyor 8 arranged along the deck on the pier side, and outboard by the conveyor belt conveyor 8. Is conveyed. These operations are performed continuously.

[0007]

According to this unloading device, the grab bucket 3 is suspended from the gate-shaped support frame 2 by the bucket lifting wire 6 and the bucket opening / closing wire 7 together with the upper frame 9 and the lower frame 10. Will be. Therefore, the grab bucket 3, which is a heavy object, easily swings back and forth and right and left around the support frame 2 together with the upper frame 9 and the lower frame 10, especially when the load is lifted by the influence of waves or when the load is grasped. Depending on the state of the bucket, the bucket 3 is likely to shake when being lifted. Due to this shaking, the grab bucket 3 which is heavy
If the ship collides with the wall of the hull 1 and damages the wall, or the shaking is severe, it is necessary to wait for the shaking to subside before restarting the work, resulting in a decrease in safety and workability. Have been.

The present invention has been made to solve such a problem, and a specific object of the present invention is to suppress the swing of the grab bucket even when the grab bucket suspended by such a wire is unloaded. Another object of the present invention is to provide an anti-swing device for an unloading bucket of a hull in which the safety of the unloading operation and the efficient operability are ensured.

[0009]

The object of the present invention, which is to prevent the grab bucket from swaying, is effectively achieved by the invention according to claim 1 having the basic structure of the sway preventing device. . The invention according to claim 1 is a gate-shaped support frame that is disposed so as to be able to travel in the front and rear of the hull over the left and right sides of the hull, and that the hull is extended inside the support frame and is provided with a bucket lifting wire. Applied to a marine vessel unloading device equipped with a grab bucket that can be moved up and down between inside and outside, and a tub is opened and closed in the front-rear direction by a wire for opening and closing, and installed at the upper left and right ends of the support frame One or more fixed sheaves and one or more swings which are disposed on substantially the same plane including the bucket lifting and lowering and opening / closing wires, intersect on the same plane, and are partially fixed to the grab bucket. And a wire for stopping, wherein the wire for preventing rocking is stretched by one or more balance weights via each of the fixed sheaves.

[0010] For example, as described in claim 2, a part of one swing-preventing wire is fixed to the center of the grab bucket at two places at a required interval in the longitudinal direction, and each of the fixings is fixed. Around each wire extending from the left and right to the fixed sheaves installed at both ends of the upper part of the portal-type support frame,
A balance weight is fixed to the free end of each wire. As the balance weight, an ordinary metal weight having a predetermined weight, a tension coil spring, or various accumulators including a cylinder capable of positively controlling tension and a pressure accumulator can be used.

Assuming that a tension coil spring is employed as the balance weight, if the hull is tilted left and right, the grab bucket is moved up and down by a gate-shaped bucket supporting frame and a wire for opening and closing the bucket. Trying to swing left and right through At this time, the tension in the swing direction wire of the left and right swing-prevention wires fixed to the upper central portion of the bucket with a space therebetween decreases, the tension spring attached to the tip of the wire shrinks, and the other side has a tension spring. The tension of the anti-sway wire is increased, and the tension coil spring attached to the tip of the anti-sway wire is extended.

As a result, the force for returning the left and right anti-sway wires to the normal position in order to maintain the balance between the extension coil springs fixed to the respective side surfaces of the left and right legs of the gate-shaped support frame is increased. In this way, even when the hull sways, the sway of the bucket is suppressed and the sway is attenuated at an early stage. Further, if a weight is used instead of the tension coil spring, a uniform tension force is always applied to the grab bucket from the left and right, so that even if the hull starts to roll, the left and right rocking stops. A tension difference is generated between the wires for use, and a force for always returning the grab bucket to its original state acts on the grab bucket, and the swing of the bucket can be effectively suppressed from the beginning. Such a function is similarly exerted by always turning the bucket in the direction of gravity even when the tank is shaken in the longitudinal direction.

According to the third aspect of the present invention, in addition to the configuration of the first aspect, the swing-preventing wire guided through the fixed sheave is crossed so that the part of the wire is provided at both upper end portions of the bucket. It is fixed. In the present invention, a counterclockwise rotating force acts on the right end of the bucket,
A clockwise rotational force acts on the left end of the bucket, and the same operation and effect as the invention according to claim 2 are exerted even if the hull swings in any direction.

According to a fourth aspect of the present invention, the balance weight is provided on one side surface of the support frame. In this case, each of the fixed sheaves arranged at the upper left and right ends of the support frame is wound around the two anti-sway wires extending from the bucket so as to be guided to one side surface of the support frame. Since the installation position of the balance weight is arranged on one side of the support frame, various types of maintenance are facilitated.

The invention according to claim 5 stipulates that the balance weight is arranged on both side surfaces of the support frame. Generally, it is not sufficient to simply install the fixed sheaves according to the present invention one by one at the upper left and right ends of the support frame, and it is often installed as a plurality of sets. Although detailed description is omitted, a number of attached devices are provided in addition to the fixed sheave. Therefore, if these installations are biased to one side, the difference between the left and right weights increases, which may affect the left-right balance of the ship. According to the present invention, their balance is ensured.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a typical embodiment of an anti-sway device for a ship unloading bucket according to the present invention. In these drawings, the same reference numerals are given to members and the like that are substantially the same as those of the conventional device shown in FIGS.

FIGS. 1 to 3 show a first embodiment of the present invention. FIG. 1 is a front view of an unloading device for a hull provided with a bucket anti-swing device of the present invention, and FIG. 2 is the anti-sway device. FIG. 3 is a side view of the anti-sway device as viewed from the balance way and from the side, and FIG.

The main body of the unloading device for a hull according to the present embodiment has the same structure as the conventional one shown in FIG. 8 and FIG. 9. The gate-shaped bucket support frame 2 provided in this manner travels in the front-rear direction perpendicular to the drawing. This support frame 2
The upper girder portion 2a is provided with four sets of two fixed sheaves 11 each. Each of these fixed sheaves 11 is provided with a bucket opening / closing wire 7 and a bucket lifting wire 6 for each set. Has been hung around.

The lower end of each bucket lifting wire 6 is
The lower end of the lower frame 1 is fixed to the upper frame 9 of the grab bucket device, and the hanging lower end of each bucket opening / closing wire 7 passes through the upper frame 9 and is arranged in parallel downward.
0, and is wound around the driven sheave (not shown) arranged on the lower frame 10 on the way. The grab bucket 3 is integrated by linking a lower end of the grab bucket 3 and the upper frame 9 by a rod 13. The other ends of the bucket lifting wire 6 and the bucket opening / closing wire 7 are connected to a winding source (not shown) provided on the support frame 2.

The hull 1 is provided below the support frame 2.
A hopper 5 is provided which can travel in the front-rear direction of the hull 1 together with the feeder conveyor 4 arranged in the transverse direction of the hull 1, and the conveyor for conveyance along the front-rear direction of the deck on the discharge side of the load of the feeder conveyor 4 is provided. 8 are arranged. The hopper 5 travels between a standby position at any one of the front and rear ends in the support frame 2 and a position directly below the grab bucket 3 which holds a bulk load and rises to an upper position and waits.

In this embodiment, two vertical guide members 12a as shown in FIG. 2 are formed along the side surface of the leg 2c on the right side of the gate-shaped bucket support frame 2 in the drawing. A guide frame 12 is attached. The vertical guide member 12a has two driven sheaves 15 on its upper end surface.
A part of the weight 15 having a and 15b is slidably fitted. At the upper ends of the left and right legs 2b, 2c of the gate-shaped support frame 2, one swing-preventing fixed sheave 14a, 14b is provided, respectively. Two guide fixing sheaves 17a and 17b are also provided in parallel with 12b.

On the other hand, one end of two anti-sway wires 16a, 16b is fixed to the upper surface of the upper portion of the upper frame 9 of the grab bucket device. As shown in FIGS. 1 to 3, the anti-sway wires 16 a and 16 b extend from the left peripheral surface of the anti-sway fixed sheaves 14 a and 14 b disposed on the left and right legs 2 b and 2 c of the support frame 2. It is wrapped around, guided substantially horizontally to the right end, and changes its direction upward along the guide frame 12 via a guide member. Next, it is wrapped around the upper peripheral surfaces of the two guide fixing sheaves 17a and 17b arranged on the upper end girder portion 12b of the guide frame 12 and is turned substantially 360 ° to be guided vertically downward, and the weight 15 The peripheral surfaces of the two driven sheaves 15a and 15b juxtaposed on the upper surface of the
The guide frame 12 is guided vertically upward by changing the direction of 0 °, and each end thereof is fixed to the lower surface of the upper end girder portion 12b of the guide frame 12.

Now, when the bucket device is lowered to grasp the bulk load in the hull, the grab bucket 3 is opened and the bucket lifting wire 6 and the bucket opening / closing wire 7 are fed out synchronously. , Bucket 3
Is lowered into the hold. When the grab bucket 3 rushes into a bulk load in the hull, the bucket opening / closing wire 7 is wound up to close the bucket 3, and the bulk load is grasped. Next, the bucket lifting wire 6 and the bucket opening / closing wire 7 are wound up in synchronization, and the bucket 3 is raised.

In this way, when the bucket 3 grasps the bulk load and winds up and lifts the bucket lifting wire 6, the ship swings under the influence of waves or the like. Usually, the bucket 3 moves with the swing of the ship. Although the roll and the pitch are caused, the swing of the bucket 3 is largely suppressed by the anti-sway device according to the present embodiment.

That is, for example, in FIG. 1, when the entire bucket device is to be swung rightward, a large tension is generated in the left anti-sway wire 16a, and
The tension of the right anti-sway wire 16b is greatly reduced. Thus, the left anti-sway wire 16a extends through the anti-sway fixed sheave 14a and the guide fixed sheave 17a, and the right anti-sway wire 16b extends through the anti-sway fixed sheave 14b and the fixed guide sheave 17b. Try to be shorter.

At this time, of the driven sheaves 15a, 15b on the upper surface of the weight 15 suspended on the wires 16a, 16b, the weight for the anti-sway wire 16a on the left, which is to be pulled and stretched, is instantaneously weighted. A total of 15 loads are applied. As a result, the movement of the left anti-sway wire 16a is prevented, and the large sway of the bucket 3 is suppressed.

FIGS. 4 and 5 show schematic structures of first and second modifications of the above embodiment. The first modification shown in FIG. 4 differs from the above embodiment in that the weight 15 as the balance weight is directly fixed to the tips of the left and right anti-sway wires 16a and 16b. In the second modified example shown in FIG. 5, both ends of one wire are fixed to the upper ends of the left and right legs 2b, 2c of the gate-shaped bucket support frame 2 through the anti-swaying fixed sheaves 14a, 14b. The weight 15 is suspended from the loop-shaped wire fixed to the center of the upper frame 9 via a single driven sheave 15a.

Although the function of the second modification is not fundamentally different from that of the above-described embodiment shown in FIGS. 1 to 3, only the single sheave formed by one wire is used for the driven sheave. Since the weight 15 is suspended via the wire 15a, the wire portions 16a 'and 16b' corresponding to the left and right anti-sway wires 16a and 16b are attached via the right and left anti-sway fixed sheaves 14a and 14b. 15 allows a relatively slight movement.

On the other hand, in the first modified example shown in FIG. 4, the weights 15 are directly cut and fixed to the tips of the left and right anti-sway wires 16a and 16b. Has an effect of further suppressing the swing of the grab bucket 3 since the behavior of the weight 15 is directly affected.

FIG. 6 shows a second embodiment of the present invention. According to this embodiment, the left and right anti-sway wires 16 are provided at the center of the upper frame 9 of the grab bucket device.
a and 16b are fixed, and weights 15-1 and 15-2 are fixed to their free ends, respectively. The left and right anti-sway wires 16a and 16b are distributed around the anti-sway fixed sheaves 14a and 14b attached to the upper ends of the left and right legs 2b and 2c of the gate-shaped bucket support frame 2, respectively. The weights 15-1 and 15-2 are vertically suspended on left and right guide frames (not shown) as in the first embodiment. Also in this embodiment, for example, when the grab bucket 3 swings rightward, the tension angle θa of the left anti-sway wire 16a becomes smaller than the tension angle θb of the right anti-sway wire 16b,
As a result, the horizontal force for pulling back the grab bucket 3 is larger on the wire 16a than on the wire 16b, so that the movement of the bucket 3 that tends to swing rightward is prevented, and the swing of the grab bucket 3 is suppressed.

In this embodiment, tension coil springs (not shown) can be used instead of the left and right weights 15-1 and 15-2. That is, one end of each tension coil spring is fixed to the left and right guide vertical frames (not shown), and the other end of the coil spring is fixed to the ends of the left and right anti-sway wires 16a and 16b. In this case, a tension change by the spring effect acts on the left and right anti-sway wires 16a and 16b,
Further, an anti-sway effect for the grab bucket 3 is exhibited.

FIG. 7 shows a third embodiment of the present invention. According to the drawing, left and right anti-sway wires 16a,
16b are crossed and crossed around fixed anti-sway sheaves 14a, 14b attached to the upper ends of the left and right legs 2b, 2c of the gate-shaped bucket support frame 2. Also in this embodiment, the same functions as in the second embodiment are exhibited.

The weights 15, 15-1, 15-2 and the equivalents move a fixed amount on the guide frame 12 as the grab bucket 3 moves up and down. Therefore, the guide frame 12 can cover a movement amount obtained by adding the movement amount of the weight caused by the swing to the movement amount of the weight caused by the elevation of the grab bucket 3.

As can be understood from the above description, the bucket anti-sway device of the present invention has a simple structure, but is extremely effective against the sway of a marine vessel or the like in all directions. Shaking can be prevented, and the safety and workability of the unloading work are significantly improved. Note that the present invention is not limited to the above-described embodiment and modified examples, and various changes can be made within the technical scope described in the claims.

[Brief description of the drawings]

FIG. 1 is a front view illustrating a configuration of a discharge device including a bucket rocking device according to a first embodiment of the present invention.

FIG. 2 is a front view of the bucket anti-swing device on the right side of the unloading device.

FIG. 3 is a front view schematically showing the bucket rocking device.

FIG. 4 is a front view schematically showing a first modification of the first embodiment.

FIG. 5 is a front view schematically showing an embodiment of the second modified example.

FIG. 6 is a front view schematically showing a bucket rocking device according to a second embodiment of the present invention.

FIG. 7 is a front view schematically showing a bucket swing prevention device according to a third embodiment of the present invention.

FIG. 8 is a side view of a conventional ship unloading device.

FIG. 9 is a front view of the same device.

[Explanation of symbols]

 Reference Signs List 1 hull 2 bucket support frame 2a upper girder 2b, 2c left and right legs 3 grab bucket 4 feeder conveyor 5 hopper 6 bucket lifting / lowering wire 7 bucket opening / closing wire 8 transport belt conveyor 9 upper frame 10 lower frame 11 rod 12 guide Frame 12a Vertical guide member 12b Upper girder 13 Rod 14a, 14b Fixed sheave for anti-sway 15, 15-1, 15-2 Weights 15a, 15b Followed sheave 16a, 16b Wire for anti-sway 16a ', 16b' For anti-sway Wire portions 17a, 17b Guide fixed sheave P1 First position P2 Second position θa Tension angle of anti-sway wire 16a θb Tension angle of anti-sway wire 16b

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshiyuki Sawano 2-3-6 Akasaka, Minato-ku, Tokyo F-term (reference) in Komatsu Manufacturing Co., Ltd. 3F204 AA07 BA09 CA03 DA04 DA10 EA15 EA17

Claims (5)

[Claims] 1. A gate-shaped support frame traversable on the left and right sides of the hull so as to be able to run in front and rear of the hull, and extending between the support frames and between the inside and outside of the hull by a bucket lifting wire. And a grab bucket that is opened and closed in the front-rear direction of the hull by a wire for opening and closing. The above fixed sheave and one or more rocking stoppers which are disposed on substantially the same vertical plane including the bucket lifting and lowering and opening / closing wires, intersect on the same plane, and are partially fixed to the grab bucket. And a wire, wherein the anti-sway wire is stretched by one or more balance weights via the fixed sheaves. 2. The part of the anti-sway wire,
2. The anti-sway device according to claim 1, wherein the anti-sway device is fixed to an upper central portion of the grab bucket. 3. The anti-sway device according to claim 1, wherein the anti-sway wires guided through the fixed sheave cross each other, and the ends of the wires are fixed to both upper ends of a bucket. 4. The anti-sway device according to claim 2, wherein the balance weight is disposed on one side surface of the support frame. 5. The anti-sway device according to claim 2, wherein the balance weight is disposed on both side surfaces of the support frame.