JP2000095478A - Crane with crab and operation thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crane and an operating method therefor capable of shortening loading time and improving work efficiency and productivity. SOLUTION: A plurality of sets of rails 3, 4 are installed on the same girder 2 of a crane 1, and a plurality of crabs 5, 6 are mounted on the rails 3, 4 independently so as to be traversable. One crab 5 is formed with a lifting tool for loading such as a lifting magnet 7 or a grab bucket, and the other crab 6 is formed with a bucket 8 for carrying loads in it. Using the crane, the bucket 8 is positioned near a vehicle loaded with loads to be unloaded, and steel scrap loaded on the vehicle is transferred into the bucket 8 with the lifting magnet 7. Concurrently with retreat of the vehicle, the bucket 8 is carried to an unloading position for titling or bottom opening for discharging.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crane with a club used for loading and unloading scraps and the like and a method of operating the same.

[0002]

2. Description of the Related Art Scrap yards for steelmaking equipment such as electric furnaces or converters are inexpensive in terms of scrap yards (hereinafter referred to as supply yards) for loading scraps into scrap baskets for supplying electric furnaces or converters. It can be broadly divided into scrap yards (hereinafter referred to as storage yards) which are purchased in large quantities at an appropriate time and temporarily stored for stockpiling or replenishment in a supply yard.

[0003] A supply yard is generally provided adjacent to a part of a steel making facility in order to reduce the moving time of the scrap basket, and a storage yard is generally provided in a place where a sufficient land space can be secured.

In the supply yard, Japanese Patent Laid-Open No. 8-209254
Japanese Patent Application Laid-Open No. 2-44884 discloses a method in which the operation of a scrap transporting crane is partially automated by arranging the truck loading lanes in a concentrated manner as disclosed in Japanese Patent Publication No. In some vehicles, a platform for directly supplying a scrap basket (loading chute bag) to a supply yard is provided by using a vehicle having a dump function.

On the other hand, in the storage yard, Japanese Patent Laid-Open No. 9-250
No. 85, a plurality of storage / storage lanes surrounded by a partition wall are arranged in parallel, and the respective storage / storage lanes are arranged in parallel.
There is a traveling route of a scrap transporting crane (portable traveling crane) that can travel across a vehicle path and any one storage / storage lane between the storage lanes.

[0006] In the supply yard, a temporary storage yard for storing scraps such as major brands of the expected amount to be paid out on the same day within the working range of the scrap transporting crane, and corresponding to replenishment or schedule change. A scrap yard for storing spare stocks is also provided to facilitate smooth delivery to scrap baskets and shorten the delivery time.

According to the technique described in Japanese Patent Application Laid-Open No. 8-209254, a truck loaded with scrap is regarded as one of the scrap temporary storage yards during the scrap dispensing process, and the scrap is directly supplied to a dispensing hopper. Therefore, depending on the required brand of scrap and the like, the first truck may be delayed, and as a result, the operation plan of the truck may be disturbed.

In order to increase the efficiency of unloading scrap loaded on a truck, two lifting magnets which can be operated independently are used. The operation procedure is as follows. (1) Scrap is adsorbed by the first lifting magnet. (2) The scrap is lifted (winded up) to a height at which the lower end of the sucked scrap does not contact the top side of the packing box of the truck and is stopped. (3) The scrap transporting crane is moved in the width direction of the truck such that the second lifting magnet comes over the cargo box of the truck. (4) Similarly, after the scrap is sucked by the second lifting magnet, it is raised and stopped. (5) Move the scrap conveying crane to the position for receiving the scrap, release the lifting magnet, and return to the position of the truck again. The above operations (1) to (5) are repeated until the loading scrap ends, and the operation time cannot be shortened by half as compared with one lifting magnet.

On the other hand, the technique described in Japanese Patent Publication No. 2-44884 mentioned above arranges an intermediate receiver in order to eliminate waiting time on a platform of a vehicle having a dump function. Many of the discrepancies are due to loading the vehicle into storage yards. This is due to irregularities in the operation plan of the storage yard, such as uneven loading time of the scrap by the loading machine such as a crawler crane equipped with a lifting magnet, or waiting time for the vehicle due to the operation status of the loading machine. Therefore, a smooth scrap loading operation in the storage yard is desired.

[0010] Japanese Unexamined Patent Publication No. Hei 9-2 discloses a method of loading (dispensing) scraps smoothly in a storage yard.
There is a system described in Japanese Patent No. 5085. In the loading operation with this system, a dispensing hopper is provided below both ends of the trolley that can traverse the scrap crane that is dedicated to dispensing, and the required scrap is temporarily stored using the lifting magnet provided on the trolley. If necessary, after weighing, the operation of dispensing to a waiting vehicle (lateral dump truck) below the dispensing hopper is repeated until a predetermined amount is reached. When the predetermined amount is relatively small, the loading operation can be completed with one payout.

[0011] By the way, scraps that arrive in the storage yard are processed steel such as mold steel (H steel, steel sheet pile, etc.), steel pipe, steel plate, reinforcing steel, wire rod, etc. generated as construction and building waste, and press waste generated at factories. Pressed products such as materials, scrap cars and lightweight scraps,
Slabs, steel plates, coil materials and other shapes and properties that do not become products due to shredder scraps, defects generated at steelworks, etc.

For this reason, many dispensing hoppers cannot be dispensed because they are entangled with each other, and it is more efficient to directly dispense large-capacity, heavy pressed products.
There are many things that cannot be handled by a scraper crane dedicated to payout equipped with payout hoppers on both sides.

Further, the storage yard is provided with one portal mobile crane in one storage / storage lane for receiving or paying out, and the single portal mobile crane includes a plurality of storage lanes.・ Because it is assigned to the storage lane, storage corresponding to the type of scrap loaded on the vehicle ・ Storage while the storage lane and the portal mobile crane are operating
If the storage lane does not match, the vehicle moves to the standby or planned storage / storage lane via the lane change area. Since it is determined by the interval, it is not necessary to increase the long side to increase the storage amount, so the next storage / storage
It takes time to move to the storage lane, and the receiving or paying out work cannot be performed during the movement, so that the working efficiency is deteriorated.

In general, the greater the traveling amount of the self-propelled cargo handling machine, the higher the maintenance and maintenance costs.

The passage between the storage / storage lanes is indispensable for the operation of the storage yard, but as the number of storage / storage lanes is increased, the space for the passage increases, and the storage / storage lanes are effectively used for storage / storage. Dead space that cannot be stored increases.

[0016]

As described above, the conventional scrap transport system has the following problems.

(1) Unloading and storage of iron scraps from transport vehicles,
The loading of iron scraps from the storage to the vehicle was repeatedly performed by lifting magnets, grab buckets, etc., and was repeatedly carried out by suction or grasping, and once transported to the storage location. Is inefficient.

(2) When the vehicle is transported by a dumping vehicle, the unloading operation is omitted. However, the crawl operation for transporting the vehicle to a predetermined storage location by a crane is required, so that the crane handling time is not reduced.

(3) Even when a container capable of tilting and opening and closing the bottom to discharge iron waste is transported by a vehicle such as a trailer, the characteristics of the container cannot be utilized.
It took time because the cargo was handled in the procedure as in (2).

(4) When loading stored iron scraps into a transport vehicle, it takes time to repeat the same operation as in (1) and load the scraps little by little.

The problem to be solved by the present invention is as follows.
An object of the present invention is to provide a crane and a method of operating the crane, which can shorten the cargo handling time and can increase the work efficiency and productivity.

[0022]

In order to solve the above-mentioned problems, a crane with a club according to the present invention has a plurality of rails attached on the same girder of the crane, and independently of each of the plurality of rails. One club is equipped with lifting equipment such as lifting magnets and grab buckets, and the other club is equipped with buckets for loading and carrying loads. is there.

The method of operating a crane with clubs according to the present invention is characterized in that a plurality of sets of rails are provided on the same girder of the crane, and a plurality of clubs can be independently traversed for each of the plurality of sets of rails. It is an operation method of a crane with a club equipped with a lifting magnet, a grab bucket, etc. for loading and unloading, and the other club is equipped with a bucket for loading and carrying, Position the bucket near the vehicle, transfer iron scraps loaded on the vehicle to the bucket with hanging equipment for cargo handling,
When the carton is empty, the car moves quickly for the next task. After the transfer is completed, the bucket is transported to the unloading place in the designated division, and the bucket is tilted or the bottom is opened and discharged.

In the case of a dump type vehicle, a bucket is located at a dumping unloading place, and a load is dumped therein.
After the dump, the vehicle moves quickly. After the transfer is completed, the bucket is transported to the unloading place in the designated section, and the bucket is tilted or the bottom is opened and discharged.

When a container such as a trailer is used to transport a container capable of tilting and opening and closing the bottom to discharge the iron swarf, a constantly suspended bucket is removed by remote control from a cab and the trailer is removed. Lift the container that has been loaded,
Carry to the designated unloading area, and tilt or open the bottom to discharge.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to embodiments shown in the drawings. FIG.
1 is a front view showing a first embodiment of the present invention, and FIG. 2 is a plan view thereof. In the first embodiment, two sets of rails 3 and 4 are provided on the girder 2 of the overhead traveling crane 1, and the first and second clubs 5 and 6 that can traverse independently are mounted on these rails 3 and 4. The first club 5 has a lifting magnet 7, and the second club 6 has a transporting bucket 8 suspended from a hanging wire rope extending from both outsides of the beam 2. In the figure, reference numeral 9 denotes a cab, and reference numeral 10 denotes a traveling rail of the girder 2.

In this embodiment, the bucket 8 is positioned near the transport vehicle, the iron scrap is transferred from the transport vehicle to the bucket 8 by the lifting magnet 7, and a large amount of iron scrap is moved to a predetermined unloading location at one time. Unload the bucket 8 by tilting or opening the bottom. The loading procedure is the same except that the transport vehicle and the unloading location are reversed.

Further, for a dump type vehicle, the unloading operation can be omitted by unloading the cargo directly to the suspended bucket 8 and transporting it at once.

Further, the debris that has been transported in a box-like container by a trailer or the like is constantly suspended in a bucket 8.
Can be separated by a remote operation, and the boxes on the trailer can be lifted and transported and unloaded at one time, so that the unloading can be performed efficiently.

FIG. 3 is a front view showing a second embodiment of the present invention.
FIG. 4 is a side view thereof. In the second embodiment, the crane 21 has the base end of the girder 22 rotatably installed by a swivel bearing 24 above the main column 23, and a swivel leg 25 at the other end of the girder 22 by a movable carriage 26. The swing driving is performed along the rail 33. A first club 27 and a second club 28 that can independently traverse the beam 22 without interference are mounted on the beam 22, and the first club 27 has a lifting magnet 29 and a second club 28.
, A transport bucket 30 is suspended. In the figure, 31 is a cab, and 32 is a transport vehicle.

In the second embodiment, the bucket 30 is located in the vicinity of the transport vehicle 32, and iron scraps are transferred from the transport vehicle 32 to the bucket 30 by the lifting magnet 29.
At the same time, a large amount of iron scrap is moved to a predetermined unloading place, and the bucket 30 is unloaded by tilting or opening the bottom.
In FIG. 3, 29a and 30a indicate positions where iron scraps are being transferred from the transport vehicle 32, 29b and 30b indicate raised positions, and 29c and 30c indicate positions of the lifting magnet 29 and the bucket 30 in a standby state. I have.
In addition, 30d in FIG. 4 shows the state of the bucket 30 during unloading due to tilting. The other operations are the same as those of the first embodiment, and the description is omitted.

[0032]

As described above, according to the present invention, the following effects can be obtained.

(1) Land transport of iron waste is mainly carried out by large vehicles and wagons. However, when the waste is lightweight waste such as city waste, the storage yard for unloading becomes large, and the waste is unloaded and transported by a crane. Since the distance is long, it is inefficient to carry the small number of times by the lifting magnet and the cargo handling hanger such as the bucket or the grab bucket. In the crane according to the present invention, the cargo is temporarily transferred to a large bucket suspended from the other club by a cargo lifting device suspended from one club, then transported to a predetermined place, and the bucket is tilted or the bottom is opened. By unloading, the productivity of unloading can be significantly increased. Loading is the same if the process is reversed.

(2) Conventionally, there is a club in which two types of hanging members such as a lifting magnet and a bucket or a grab bucket are attached to one club. However, the function of each hanging member cannot be moved independently. Although there is complementarity, there is no relevance, and the effect of improving productivity is not so large.
In the present invention, work can be performed by using two types of hanging tools in cooperation or alone, and each feature is easily utilized and efficiency is improved.

(3) In order to increase the efficiency of cargo handling by cranes, cargo handling and hanging equipment such as lifting magnets have been increased in size. However, since the width of the cargo box of the vehicle is restricted by law, the size of the cargo box is large. There is a limit to the conversion and it cannot be made too large, so it has to be transported many times. According to the present invention, the maximum unloading ability can be exhibited while using the hanger of the optimal size for the vehicle.

(4) For vehicles capable of dumping and unloading, according to the present invention, dumping and unloading can be carried out in a bucket suspended by a crane, and collective transportation and unloading can be performed. It is no longer necessary to carry the piled load over the pile, so that the operating time of the crane can be greatly reduced.

(5) In the present invention, for a vehicle carrying a cargo box which can be suspended, the bucket constantly suspended by remote control is detached, and then the cargo box carried by the vehicle is suspended and collectively transported / unloaded. Therefore, the unloading work (and the loading work if the process is reversed) is significantly more efficient.

(6) Cargo handling from the vehicle to a predetermined place is not required, and the cargo becomes a cargo handling between a temporarily placed bucket adjacent to the vehicle. Efficiency can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment of the present invention.

FIG. 2 is a plan view of the first embodiment.

FIG. 3 is a front view showing a second embodiment of the present invention.

FIG. 4 is a plan view of a second embodiment. 1 overhead traveling crane, 2 digits, 3, 4 rails, 5
1st club, 6 2nd club, 7 lifting magnet, 8 bucket, 9 cab, 10 running rail, 21 crane, 22 girder, 23 main pillar, 24 swivel bearing, 25 swivel leg, 26 moving trolley, 27 first Club, 28 Second Club, 29 Lifting Magnet, 30 Bucket, 31 Driver's Cab, 32 Transport Vehicle, 33 Swing Rail

[Procedure amendment]

[Submission date] September 28, 1998 (1998.9.2)
8)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazumasa Miura 3-2-24 Nakasone Higashi, Nakagane-ku, Kitakyushu-shi F-term (reference) 3F203 AA10 BA07 CA02 CC01 DA03 DA09 FA01

Claims (4)

[Claims] 1. A plurality of sets of rails are provided on the same girder of a crane, and a plurality of clubs are mounted on each of the plurality of sets of rails so as to be able to traverse independently of each other. Equipped with lifting equipment such as grab buckets, and the other club has
A crane with a club, which is equipped with a bucket for carrying a load. 2. A plurality of sets of rails are attached to the same girder of a crane, and a plurality of clubs are mounted on each of the plurality of sets of rails so as to be independently traversable. Equipped with lifting equipment such as grab buckets, and the other club has
A method of operating a crane with a club equipped with a bucket for loading and carrying a load, wherein the bucket is located near a vehicle loaded with a load to be unloaded, and iron loaded on the vehicle by a lifting device for cargo handling. A method of operating a crane with a club, comprising transferring refuse to a bucket and, when the bucket is full, transporting the bucket to an unloading place and tilting or opening the bottom to discharge. 3. A plurality of rails are provided on the same girder of a crane, and a plurality of clubs are mounted on each of the plurality of rails so as to be able to traverse independently of each other. Equipped with lifting equipment such as grab buckets, and the other club has
A method of operating a crane with a club equipped with a bucket for loading and carrying a load, wherein when a vehicle loaded with a load to be unloaded is a dump type vehicle, the bucket is located at a dumping unloading place, and Operating a crane with a club, wherein the cargo is dumped, the bucket is carried to an unloading place, and the bucket is tilted or opened to discharge. 4. A plurality of rails are provided on the same girder of the crane, and a plurality of clubs are mounted on each of the plurality of rails so as to be able to traverse independently of each other. Equipped with lifting equipment such as grab buckets, and the other club has
This is an operation method of a crane with a club equipped with a bucket for loading and transporting, where a container capable of tilting, opening and closing the bottom and discharging iron scraps has been transported by a vehicle such as a trailer. A crane equipped with a club, which removes a bucket that is always suspended by remote control from the cab, lifts a container loaded with a trailer, transports it to an unloading place, tilts or opens the bottom and discharges it. how to drive.