JP2000053369A - Cargo handling gear and cargo handling method using the same gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance cargo handling efficiency without using a magnet like a conventional way for loading work for loading cold pig iron in bulk from land on to a ship. SOLUTION: A load carrying platform 1 on which cold pig iron 45 in bulk is placed is lifted up by a crane via a spreader 11 on which a cargo handling gear 19 is mounted after the platform 1 is transported to a berth by a trailer. By temporarily placing the load carrying platform 1 within a hold, a rotating part of a chain sprocket 29 of the cargo handling gear 19 is away from a contact part and the chain sprocket 29 becomes freely rotatable. In this operation, the crane is slightly operated and a location of a device housing for a chain 21 is moved to an inclined location. Subsequently, if the load carrying platform 1 is lifted down by the crane, the load carrying platform 1 is inclined and thereby the bulk cargo 45 is lowered down into the hold. After the load carrying platform 1 becomes empty, a temporary placing is performed again, the location of the device housing for the chain 21 is moved to a balanced location, the load carrying platform 1 is lifted up again and the load carrying platform 1 is returned to the trailer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cargo handling device for use in loading and unloading cargo from land to a ship, for example, and a cargo handling method using the device.

[0002]

2. Description of the Related Art For example, various devices are used in a cargo handling operation of loading a bulk cargo from a land to a ship. If the bulk load is like a light powder, use a bucket device suspended by a crane, open and close the bottom of the bucket to capture the bulk load, open it in the hold, and drop the bulk load into the hold. .

If the bulk load is heavy, for example, cold iron, such a bucket device cannot support the weight because the bottom cannot support the weight. Instead, a magnet type device in which a magnet is mounted on a crane is used.

[0004] In this case, the cold iron, which is a bulk load, is loaded on a dump bed, transported to a berth (berth), and unloaded (dumped) to a storage area provided behind the berth. The unloaded pig iron was sucked by a magnet mounted on a crane, carried to the hold, and the magnetic force of the magnet was cut off to remove the pig iron. Alternatively, there has been a case where pig iron is directly sucked from a dump bed by a magnet without damping.

[0005]

However, in order to mount the magnet, it is necessary to use a crane equipped with a power supply for the magnet, and such a crane is limited, so that the cargo handling work is inconvenient. .

Further, the hinterland of the berth is narrow, and it is difficult to secure a place for storing cold iron. Or, even if the hinterland is widely present, the ground pressure may be low, and the height at which heavy cold iron is piled up is limited at the place, and as a result, it is temporarily placed in the hinterland The amount of cold iron, that is, the packing is poor.

Further, when cold iron is directly sucked by a magnet from the bed of the damb, the magnet is attracted to the steel bed by the magnetic force and collide, and the bed is shaken, and in extreme cases, the dump is damaged. There was a fear that it would.

In addition, the swing speed at which the magnet that sucks the pig iron is lifted and swung by the crane becomes slow because it is necessary to ensure the safety of maintaining the sucked state, thereby deteriorating the cargo handling efficiency. .

The above problem has been described by taking as an example the case where the bulk load is cold pig. However, similar to the cold pig, the bulk load is carried out using a crane equipped with a magnet.
Similar issues exist.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and there is no need to use a crane provided with a power supply device for magnets, and it is not necessary to secure a place behind the berth. It is an object of the present invention to provide a cargo handling device capable of increasing the cargo handling efficiency without causing damage and a cargo handling method using the device.

[0011]

According to a first aspect of the present invention, there is provided a chain in which both ends are attached to two places of a spreader for gripping a loading platform on which a bulk load is placed, and the chain is engaged with the chain from below to rotate. A free chain sprocket, and a contact portion that contacts a rotating portion of the chain sprocket from below,
A spring for supporting the chain sprocket and biasing it in a direction away from the contact portion, and a coupling mechanism for coupling the chain housing, the contact portion, and the device housing with the spring attached to the crane. It is a cargo handling device.

According to a second aspect of the present invention, the rotating portion of the chain sprocket is a gear provided at both ends of a rotating shaft, and the contact portion has a tooth row that meshes with the gear. It is a cargo handling device.

According to a third aspect of the present invention, there is provided a first step of placing a bulk load on a dedicated carrier placed on a transport means and transporting the bulk load to a predetermined place, and suspending a spreader to which a cargo handling device is attached with a crane. A second step of attaching to the loading platform, a third step of temporarily lifting the spreader and the loading platform with the crane in a state where the position of the device housing relative to the chain is in a balanced position, and temporarily placing the loading / unloading device by the temporary loading. A fourth step of moving the position of the apparatus housing with respect to the chain to the inclined position by the crane with the rotating portion of the chain sprocket separated from the contact portion; Fifth step of lowering to the target place, lifting the empty carrier with a crane, temporarily placing it, and craneing the chain sprocket with the rotating part away from the contact part. - a handling method characterized in that it comprises a sixth step of moving the position of the housing relative to emissions to balance position.

According to a fourth aspect of the present invention, the transportation means is a trailer, the bulk load is cold iron, the predetermined location is a berth, and the destination location is a hold. The sixth step is a cargo handling method, which is performed in a hold or a berth.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. The loading platform 1 shown in FIGS.
It has a box shape exclusively for carrying cold cargo as a bulk cargo and loading it from land to a ship. The upper surface 3 and one side 5 (front side, that is, the right side in FIG. 2) are open. ing. The bottom 7 near the open side 5 is the side 5
It is inclined toward and gradually becomes shallower in depth. Due to this inclination, when the carrier 1 is inclined, the carrier 1 and the hold 9
Contact with the bottom (FIG. 9 (C)) is avoided, and the inclination is performed smoothly.

A spreader 11 for gripping the carrier is attached to the carrier 1. This mounting is performed with the guides 13 provided on both sides of the spreader 11 sandwiching the upper edge 15 of the carrier 1, and the claws of the locking devices 17 provided on all sides of the spreader 11 engage with the concave portions of the carrier 1. It is done by that.

A pair of cargo handling devices 19 according to this embodiment are attached to the right and left of the spreader 11, respectively. Both ends of the chain 21 of each cargo handling device 19 are attached before and after the spreader 11. The chain sprocket 23 meshes from the lower side of the chain 21. A pair of guide plates 25 is provided so as to sandwich the rotating surface of the chain sprocket 23, and the chain 21 is guided between the guide plates 25 and meshes with the chain sprocket 23.

Gears 29 are provided at both ends of the rotating shaft 27 of the chain sprocket 23 outside the guide plate 25, respectively. A contact portion 31 is provided below the gear 29 so as to face the gear 29. The contact portion 31
It has a tooth row 33 that can mesh with the gear 29.

A bearing 35 for supporting the rotating shaft 27 is supported by a four-sided spring 37 with respect to an apparatus housing 39. The spring 37 moves the gear 29 upward, that is, the contact portion 31.
Energize in the direction away from. Then, the device housing 39
And the guide plate 25 are integrally fixed. Guide plate 2
Above 5, a U-shaped member 41 is provided as a connecting mechanism for attaching to a crane.

A warning light device 43 with a battery is provided outside the guide plate 25 to indicate whether or not the gear 29 and the chain sprocket 23 are locked by the contact portion 31.

Next, the procedure of the cargo handling work will be described with reference to FIGS. As shown in FIG. 8 (A), the cold pig 45, which is a bulk load, is put on the dedicated bed 1 and transported by the trailer 47 to the quay (berth) 49 near the crane 51. Then, the cargo handling device 1 suspended by the crane 51
The spreader 11 to which the components 9 are attached is attached to the carrier 1 (FIG. 8B). At this time, the device housing 39 (see FIG. 5) of the cargo handling device 19 is located at a substantially balanced position in the center of the chain 21.

Next, the spreader 11 and the carrier 1 are lifted by the crane 51 via the cargo handling device 19 (FIG. 8).
(C)), carried into the hold (FIG. 8 (D)), and temporarily placed (FIG. 9 (A)). Due to this temporary placement, the gear 2 provided on the rotating shaft 27 of the chain sprocket 23 shown in FIG.
9 moves away from the contact portion 31, so that the position of the device housing 39 can be moved to the inclined position, which is one side of the chain 21, by operating the crane 51 (FIG. 9B).

Thereafter, if the crane 51 is lifted by the chain, the carrier 1 can be inclined and the cold pig 45 can be lowered to the hold 9 (FIGS. 9C and 9D). Since the bottom surface 7 of a part of the cargo bed 1 is inclined, it is difficult to contact the bottom of the hold 9 and the inclination is easily performed. When the carrier 1 becomes empty (FIG. 10 (A)), it is suspended again by the crane 51 and temporarily placed (FIG. 10 (B)), whereby the gear 29 shown in FIG. The position of the device housing is moved to the balance position of the chain 21 by the crane 51.

Thereafter, when the pallet is lifted by the crane 51, the carrier is lifted in a substantially balanced and substantially horizontal state.
9 (FIG. 10C). Here, the movement to the correct balance position is performed. Thereafter, the carrier 1 is lifted again by the crane 51, and the carrier 1 is returned to the trailer 47.

(Effects of the embodiment) Instead of using a magnet to load loose cargo by using a magnet as in the prior art, it is supposed that the loading platform on which the loose cargo is loaded is lifted by a chain and tilted to unload the cargo. Even so, in that case, one of the platforms must be manually pulled through the wire and tilted in order to tilt.

Alternatively, the carrier must be tilted by lifting it with two cranes and causing both cranes to move in another way. However, both methods are very dangerous methods, and it is difficult to secure work safety. In contrast, the cargo handling device 19 of the present invention can be operated by one crane and is extremely safe. As described above, since the load 1 can be unloaded by tilting the carrier 1 with one crane, safety can be ensured even for loose loads other than those that can be attracted with a magnet such as cold pig iron. can get.

(Other Embodiments) In the above embodiment, the bulk load is the cold pig 45, but in the other embodiments, the bulk load is not limited to the cold pig but is difficult to handle by the bucket device. The present invention can be implemented.

In the above embodiment, the box-shaped carrier 1 is open on the upper surface and one side surface.
In other embodiments, only the upper surface can be open. In the above embodiment, the loading platform 1 has a box shape. However, in other embodiments, the loading platform 1 does not necessarily have to be a box shape.
Alternatively, it may have a substantially planar shape.

Further, in the above embodiment, both ends of the chain 21 are attached to the carrier 1 via the spreader 11, but in other embodiments, they are directly attached to the carrier without the intermediary of the spreader 11. It may be a thing. Further, in the above embodiment, the rotating portion for locking the chain sprocket 23 is the gear 29 provided at both ends of the rotating shaft 27, but in other embodiments, the gear 29 is provided by the main body of the chain sprocket 23. It does not matter.

In the above embodiment, the contact portion 31 that contacts the gear 29, which is the rotating portion of the chain sprocket 23, has the tooth row 33 that meshes with the gear 29. The lock member is not limited to this, and may be another lock member that meshes with the chain sprocket 23 main body or the gear 29.

Further, in the above embodiment, the cold iron 4
Although the transporting means for transporting 5 is the trailer 47, other transporting means, such as a train, may be used in other embodiments.

In the above embodiment, the berth 49 is the predetermined place to be carried by the carrying means, and the place to be unloaded is the hold 9. However, in other embodiments, the berth 49 is not necessarily provided. It is not necessary to be the hold 9. A place where the transportation means can be stopped is a predetermined place, and a place where the carrier 1 is lifted and moved by the crane from the predetermined place to be unloaded is a target place.

[0033]

As described above, the first, second, and third aspects of the present invention are described below.
According to the third or fourth aspect, the crane is operated to move the position of the device housing with respect to the chain so that the carrier can be tilted and the loose load can be unloaded. No crane with power supply is required. In addition, since the loading platform can be directly lifted and tilted for unloading, there is no need to secure a place for storing loose loads behind the berth.

Further, since no magnet is used, there is no danger that the dump rocks and is damaged by the magnetic force of the magnet. Further, since no magnet is used, the turning speed of the crane can be increased, and the cargo handling efficiency can be improved.

Further, since the load can be unloaded by tilting the carrier with one crane, the safety can be ensured even for loose loads other than those that can be sucked by a magnet such as cold iron. can get.

[Brief description of the drawings]

FIG. 1 is a side view showing an operation of a cargo handling device according to an embodiment of the present invention.

FIG. 2 is a side view showing a horizontal state in which the cargo handling device of FIG. 1 is lifted.

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is a front view of FIG. 2;

FIG. 5 is an enlarged view of the cargo handling device of FIG. 1;

FIG. 6 is a plan view of FIG. 5;

FIG. 7 is a front view of FIG. 5;

FIGS. 8 (A), (B), (C) and (D) are diagrams showing the procedure in the first half of the cargo handling method according to the present invention.

9 (A), 9 (B), 9 (C) and 9 (D) are views showing a middle stage procedure of the cargo handling method according to the present invention.

10 (A), (B), (C) and (D) are diagrams showing the latter steps of the cargo handling method according to the present invention.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 loading platform 11 spreader 21 chain 23 chain sprocket 27 rotating shaft 29 gear 31 contact portion 33 tooth row 37 spring 39 device housing 41 connecting mechanism 45 cold pig (bulk load) 47 trailer 51 crane

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Minoru Nagai 1-2-1 Marunouchi, Chiyoda-ku, Tokyo F-term in Nihon Kokan Co., Ltd. (reference) 3F004 AH01 EA35 LA06 LA10 LA10 LB03

Claims (4)

[Claims] 1. A chain having both ends attached to two positions of a spreader for holding a bulk carrier on which a bulk load is to be loaded, a chain sprocket that meshes with the chain from below and is rotatable, and a chain sprocket. A contact portion that contacts the rotating portion of the shaft from below, a spring that supports the chain sprocket and urges it in a direction away from the contact portion, and a device housing to which the chain sprocket, the contact portion, and the spring are attached. And a connecting mechanism for connecting to the cargo handling device. 2. A chain rotating device according to claim 1, wherein said rotating portion of said chain sprocket is a gear provided at both ends of a rotating shaft, and said contact portion has a tooth row meshing with said gear.
A cargo handling device according to item 1. 3. A first step of placing a bulk load on a dedicated carrier placed on a carrier means and transporting it to a predetermined place, and a second step of suspending a spreader to which a cargo handling device is attached with a crane and attaching the spreader to the carrier. And a third step of temporarily placing the spreader and the bed with a crane in a state where the position of the apparatus housing with respect to the chain is such that the bed is horizontally balanced, and temporarily placing the spreader and the bed at a target place. A fourth step of moving the position of the apparatus housing with respect to the chain to the inclined position by the crane with the rotating portion of the chain sprocket being away from the contact portion; Fifth step of lowering the cradle to the target location, and lifting the empty carrier with a crane and temporarily placing it on the crane with the rotating part of the chain sprocket separated from the contact part. Moving the position of the device housing with respect to the chain to the balance position. 4. The transportation means is a trailer, the bulk load is cold iron, the predetermined location is a bar, the destination is a hold, and the sixth step is a hold. 4. The cargo handling method according to claim 3, wherein the cargo handling is performed by a bar.