JPH0818698B2 - Automatic scrap loading and receiving method and equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for automatically and simultaneously loading scraps of a plurality of brands in a scrap yard, and more particularly to a method of optimally handling scraps of a plurality of brands. The present invention relates to a method and an apparatus for efficiently loading and receiving by combining.

[0002]

2. Description of the Related Art Conventionally, a scrap yard in a general electric furnace factory is provided next to or adjacent to an electric furnace ridge, and a plurality of brands of scrap are loaded into an electric furnace insertion basket in the same scrap yard. In addition to doing so, he frequently receives scraps in the yard.
In particular, there are many 6 to 8 or more types of scrap brands used for electric furnace steelmaking, and at present, these scraps are scattered and stored in piles on the roughly divided ground in the yard.

To accept this scrap, since it is unloaded from a box truck such as a long-body vehicle, a lifting magnet crane (hereinafter referred to as a riff mag crane) is generally used because it is easy to handle the scrap due to the limitation of the box width. I am doing it.

[0004] Riff mag cranes are generally easy to handle for loading scraps into baskets.
For scrap with a low bulk specific gravity, the lifting capacity of the riff mag crane is poor and it takes a long time to load the basket. Therefore, the grab bucket crane (hereinafter, referred to as grab crane) may be partially used for switching.

However, in any case, since the scraps have various shapes other than the piled state, the crane operator is currently loading the baskets by the skillful handling operation of the riff mag crane or the grab crane.

The scraps of a plurality of brands have a wide bulk specific gravity of about 0.6 to 3.0. However, in order to efficiently melt these scraps in an electric furnace, the bulk specific gravity of the scraps should be 0. It is said that the case of 74 is the best. Therefore, considering the product grade, in order to process a large amount of scrap efficiently in a shorter time, a plurality of bulk specific gravities should be 0.74. It is necessary to combine brand scraps and determine the order of arrangement.

That is, the brand to be used is first determined from the product grade, and scraps of a plurality of brands are combined so that the bulk specific gravity is 0.74, and as a general rule, scraps of brands that are difficult to melt are layered in order from the bottom of the electric furnace. It is important to put in.

[0008]

On the other hand, in the recent electric furnace operation, there is a tendency that the scrap is simply melted in the electric furnace and then the components are adjusted by refining outside the furnace. Therefore, the operation time (Tap to Tap) in the electric furnace is significantly shortened, and as a result, it is necessary to load a large amount of scrap in a short time and to receive it.

Further, in recent years, due to the improvement or efficiency of electric furnace operation, it is necessary to process a large amount of scrap in a short time and at the same time, to receive a large amount of a large amount of scrap efficiently and in a short time. A lot of time and labor are required for complicated loading and receiving of scraps.

On the other hand, since the working environment in the scrap yard is a complicated work in dust and noise,
Automation of the scrap yard is highly desired. But,
Since the shape of the scrap itself to be handled is indeterminate and the bulk specific gravity is large and small, it is necessary to properly use the handling equipment suitable for scrap, and the handling of scrap by those cranes is also required by the crane operator. The size of the work is increasing, making automation of the scrap yard even more difficult.

As a prior art of this kind, Japanese Patent Laid-Open No. 58-58
Although there is Japanese Patent Laid-Open No. 193888, the invention described in this publication relates to a yard for pressing scrap and does not enable automatic loading and acceptance of a scrap yard in the present invention.

In view of the above problems, the present invention adopts an optimal handling method for the bulk specific gravity of scraps, and by efficiently combining them, the automatic loading of scraps that enables the shortest and most efficient loading and receiving. The purpose of the present invention is to provide an embedding and receiving method and its device.

[0013]

In order to achieve the above object, the gist of the first invention of the present invention is to carry out light scraps directly by a grab crane in scrap loading work and to carry heavy scraps by manual riff mag. A crane is used to load the scrap box for exclusive use of batch loading in advance, and an automatic grab crane is used to load all at once, and the scraps of the specified brand are loaded in the specified order up to the specified weight.When receiving, the manual riff mag crane is used. The heavy scraps are directly received in the pits next to the receiving site, while the light weight scraps are once received via the scrap receiving hopper or directly in the scrap box, and then wait for pre-transportation to the side of the receiving pit for automatic loading grab crane scrap loading. Characterized by receiving in the pit at once during or after the work In the automatic loading and accepted method of that scrap.

Further, the gist of the second invention of the present invention is that, in the scrap loading operation, the lightweight scrap-based yard is performed by the grab crane, and the heavy scrap-based yard is performed by the riff mag crane, and these are combined. Automatically load the scraps of the specified brand in the specified order up to the specified weight.When receiving, the lightweight scraps are temporarily transferred to the scrap box by the manual riff mag crane or directly into the scrap box for batch transfer and delivery, and then rebuilt. The truck waits for transport to the automatic operation area, and the grab crane that is automatically loading or has completed loading accepts all at once to the specified pit. Heavy scraps are temporarily transferred to the automatic operation area by the manual riff mag crane and then transferred to the scrap box on the cart. receiving and conveying waiting to automatic operation zone, to complete the automatic loading or in loading In addition, there is an automatic loading and receiving method for scrap, which is characterized in that it is directly received in a predetermined pit by a riff mag crane.

Further, the gist of the third invention in the present invention is as follows.
A manual riff mag crane for receiving scraps into the yard, a scrap pit roughly divided into light weight scraps and heavy scraps, an automatic grab crane with a hanging hook that automatically loads scraps and discharges them in batches, and manual operation Area and a grab crane that runs between the automatic operation area and a scrap box for batch transfer and dispensing, and a receiving hopper for temporary scrap receiving are provided, and the automatic grab crane is provided on the lightweight scrap pit in the automatic operation area of the crane. The automatic loading and receiving device for scrap is characterized by loading a scrap into a weighing hopper and receiving it in a predetermined pit by providing a control device for automatically controlling.

Furthermore, the gist of the fourth invention in the present invention is a manual riff mag crane for receiving scraps into a yard, a scrap pit roughly divided into lightweight scraps and heavy scraps, automatic loading of scraps and scraps. Provided with an automatic grab and an automatic riff mag crane with a hanging hook that conveys and pays out, a building replacement cart that runs between a manual operation area and an automatic operation area of the grab crane, a scrap box for scrap transfer and delivery, and a receiving hopper for temporary scrap receiving, The automatic grab crane is provided on the lightweight scrap pit in the crane automatic operation area, the automatic riff mag crane is provided on the heavy scrap pit, and a control device for automatically controlling the grab crane and the riff mag crane is provided to the scrap hopper. Predetermined when loading In automatic loading and receiving apparatus scrap, characterized in that to accept the pit.

[0017]

According to the first aspect of the present invention, the scrap loading work is carried out directly by the grab crane for the light weight scrap, and the heavy scrap is loaded by the manual riff mag crane in advance in the dedicated scrap box for batch loading. Light-weight scrap is loaded together with pre-loaded heavy-weight scrap by an automatic grab crane, and by combining these, the specified brand of scrap is loaded in the specified order up to the specified weight. In addition, for scrap acceptance, heavy scrap is directly received by the manual riff mag crane into the pit next to the receiving place, and light scrap is temporarily received by the manual riff mag crane via the scrap receiving hopper or directly into the scrap box, and then advance to the side of each receiving pit. It will be transported to and put on standby, and will be received in batches by brand during the scrap loading work by the automatic grab crane or after completion.

Further, according to the second aspect of the present invention, in the scrap loading operation, the lightweight scrap-based yard is loaded by the automatic grab crane, the heavy scrap-based yard is loaded by the automatic riff mag crane, and they are combined. Automatically load the specified brand scraps in the specified order up to the specified weight. In addition, for the acceptance of scraps, light-weight scraps are once received by the manual riff mag crane via the scrap receiving hopper or directly in the batch transfer and discharging scrap box, and then transferred to the automatic operation area by the pallet transfer truck for standby, during automatic loading or A grab crane that has completed loading receives it all at once in a predetermined pit, and a manual riff mag crane once receives heavy scrap into the scrap box on the dolly transfer truck, transfers it to the automatic operation area, and waits for automatic loading, or a riff mag crane that has completed loading. Accept directly to the designated pit at.

Further, according to the third aspect of the present invention, in the scrap pit which receives scraps into the yard by the manual riff mag crane and is roughly divided into light weight scrap pits and heavy scrap pits, in the loading of scraps, the heavy scraps are The manual riff mag crane is used to load the scrap box in advance, and the lightweight scrap is loaded to the weighing hopper by the grab crane provided on the lightweight scrap pit, and the heavy scrap previously loaded to the scrap box is also loaded to the weighing hopper. Regarding scrap acceptance, heavy scrap is accepted directly into the pit by a manual riff mag crane.
Light-weight scrap is temporarily received by the manual riff mag crane via the temporary receiving hopper for scrap or directly in the scrap box for batch delivery and is then transferred from the manual operation area to the automatic operation area by the trolley, and during or after the scrap loading operation, the grab crane Will be accepted in the designated pit. This grab crane is automatically controlled by the controller.

Furthermore, according to the fourth aspect of the present invention, in the scrap pit, in which scrap is received by the manual riff mag crane into the yard and roughly divided into a light weight scrap pit and a heavy scrap pit, the light scrap is loaded in the scrap loading. The automatic grab crane installed on the lightweight scrap pit loads the weighing hopper, and the heavy scrap is loaded on the weighing hopper by the automatic riff mag crane installed on the heavy scrap pit. When accepting scraps, both lightweight scraps and heavy scraps are temporarily transferred by a manual riff mag crane to a temporary scrap receiving hopper or directly transferred to a scrap box for delivery, and then transferred from a manual operation area to an automatic operation area by a pallet truck. During scrap loading or after completion, heavy scraps are received by a riff mag crane and light scraps are received by a grab crane into a predetermined pit. The grab crane and the riff mag crane are automatically controlled by the control device.

As described above, the riff mag crane and the grab crane are selectively used depending on the bulk specific gravity of scrap, loading and receiving are carried out by an optimal handling method for scrap, and automatic operation and manual operation are combined, and these are totally combined. Sequentially combined to minimize scrap yard, automatic loading of scrap yard,
The yard scrap is received efficiently and efficiently.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a plan view showing an entire scrap yard according to a first embodiment of the present invention, FIG. 2 is a side view showing a receiving hopper and its peripheral equipment, and FIG. 3 is a front view showing a relationship between a scrap box and a hanging hook. FIG. 4 is a front view showing the weighing hopper and its peripheral equipment.

As the layout of the scrap yard Y in the first embodiment, the weighing hopper 6 is installed in the center of the yard Y, and the light-weight scrap pits LP having a small bulk density which occupy most of the loading time are arranged on both sides of the weighing hopper 6. On both sides, heavy scrap pit HP with large bulk density
And scrap receiving stations R are arranged on both sides of the scrap yard Y.
The bulk specific gravity of 1.0 or less) and heavy scrap (for example, bulk specific gravity of 1.1 or more) are received into the scrap yard Y and the received heavy scrap is loaded manually, and the received lightweight scrap is loaded and the received lightweight scrap is received. It is configured to automatically accept scraps in the pits by brand. The scrap yard Y has an A yard above the center and a B yard below the center.

As shown in the figure, the main equipment of the scrap yard Y in the first embodiment is, among the scraps of a plurality of brands, a lightweight scrap pit LP for storing a lightweight scrap and a heavy scrap for storing a heavy scrap. Grab handling automatic crane 1 (hereinafter referred to simply as automatic grab crane) with a grab bucket in which a pit HP and a hanging hook 1a for a scrap box for loading and receiving the lightweight scrap in the lightweight scrap pit LP are arranged in parallel, and scrap A scrap receiving manual riff mag crane 2 (hereinafter, simply referred to as a manual riff mag crane) for receiving the scrap carried into the yard Y and loading the heavy scrap in the heavy scrap pit HP, and a scraper by the manual riff mag crane 2. A receiving hopper 3 for receiving a flop once, a bottom closure scrap box 4 provided on the lower portion of the receiving hopper 3, the scrap box 4
And a weighing hopper 6 for weighing heavy scrap and light scrap loaded by the automatic grab crane 1. The weighing hopper 6 is a weight detector 6a. (Eg, load cell).
Further, a pre-loading scrap box 7 for pre-loading heavy scraps is provided beside the heavy scrap pit HP on the movable pallet truck that is movable on the ground, and the weighing hopper 6 and the electric furnace are provided. Between E and E, a carriage 9 that conveys the electric furnace charging basket 8 is movably provided. Reference numeral 10 is a long-body vehicle for carrying in scrap, and damping pits 12 for temporarily receiving the scrap carried in by the dump truck 11 are provided at both ends of the scrap yard Y.

As shown in FIG. 2, the relationship between the receiving hopper 3, the scrap box 4, and the carrier 5 is that the receiving hopper 3 is fixed below the receiving hopper 3 in a horizontal direction in FIG. A carrier truck 5 is movably provided on the upper side, and a scrap box 4 is placed on the carrier truck 5. Then, the scrap once received by the receiving hopper 3 is configured to be thrown in by opening the gate 3a when the scrap box 4 is located below the receiving hopper 3.

The scrap thus loaded into the scrap box 4 is lifted up by a hanging hook 1a provided in parallel with the automatic grab crane 1 as shown in FIG. By opening the box, scrap can be batch-loaded and accepted.

On the other hand, as shown in FIG. 4, the relationship between the weighing hopper 6, the electric furnace charging basket 8 and the carriage 9 is that the rail 9a laid vertically in FIG. A charging basket carrier 9 is movably provided.

Regarding the automatic loading work of scrap,
Light-weight scrap with a low bulk density has poor handling efficiency in the riff mag crane, so in order to efficiently and automatically load in a short time, the automatic grab crane 1 is used to automatically load the weighing hopper 6 from each brand pit, Since large heavy scraps cannot be gripped efficiently by the grab crane or are impossible, use the manual riff mag crane 2 for scrap reception and carry out bottom loading before the automatic grab crane 1 starts automatic loading on the weighing hopper. Retractable pre-loading scrap box 7
The specified amount should be loaded while weighing with the crane scale provided on the manual riff mag crane 2. Therefore, in the first embodiment, in principle, the automatic grab crane 1 automatically travels on the lightweight scrap pit LP by the control device (not shown) (left and right direction in the figure).
The manual riff mag crane 2 is configured to traverse (vertical direction in the drawing) and to traverse and traverse on the heavy scrap pit HP and the scrap receiving site R by a manual operation of a crane operator.

The above lightweight scrap pits LP
As shown in one pit, addresses N virtually divided at predetermined intervals are attached in advance, and are not shown in accordance with the running / traversing route pattern of the automatic grab crane 1 determined using this address N. The control device is configured to automatically control the grab crane 1 to always run and traverse in a plane.

The automatic loading and receiving of the first embodiment having the above configuration will be described in detail with reference to the flow chart showing the automatic loading command in the first embodiment shown in FIG. 5 and the plan view of FIG.

First, when the scrap yard management room issues a command for automatic loading of scrap, as shown in FIG.
Both in the yard and the B yard, the heavy scrap is pre-loaded into the pre-load scrap box 7 (Fig. 1) while being weighed by the operator using the crane scale provided on the manual riff mag crane 2, and the heavy scrap pit HP
Keep it next to me.

In the automatic loading in the scrap yard Y, first, the automatic loading of scraps of a plurality of brands into the weighing hopper 6 by the automatic grab crane 1 is started in accordance with the designated division loading sequence, and the weight detection provided in each weighing hopper 6 is started. Scrap is automatically loaded into the weighing hopper 6 from each brand pit while weighing with the vessel 6a.

Further, in this automatic loading, heavy scrap having a large bulk specific gravity is suspended by the automatic grab crane 1 provided with a bottom opening / closing type preloading scrap box 7 standing by beside the heavy scrap pit HP as described above. It is hoisted by the hook 1a and loaded into each weighing hopper 6 in a batch in the automatic loading sequence.

In each weighing hopper 6, the total loading weight is always integrated, and at the time of final loading of each brand, whether or not the last glove is fully loaded is rounded off to determine additional loading.

Further, in the final loading yard for the electric furnace insertion basket 8, the loading amount for the weighing hopper 6 in the other yard is added up and totaled, and the loading amount for one final automatic grab crane is compared with the designated loading amount for the basket. Adjustments shall be rounded off. Therefore, the loading accuracy of the electric furnace charging basket 8 is the capacity of the automatic grab crane 1 for ± 1/2 times the specified loading amount.

As described above, the scraps of the specified brand are discharged from the weighing hopper 6 in a predetermined order, and the scraps in the charging basket 8 are charged into the electric furnace by the scrap charging crane.

Next, regarding the acceptance of scrap into the scrap pit, the unloading from the long-body vehicle 10 (see FIG. 1) carried into the scrap yard Y is performed at the receiving stations R arranged on both sides of the scrap yard Y. In the above, all are carried out by the manual riff mag crane 2 by the crane operator's manual mass control (master control) operation, and heavy scrap having a large bulk specific gravity is directly received from the long body vehicle 10 by the manual riff mag crane 2 into each brand pit.

On the other hand, the lightweight scrap having a low bulk specific gravity is
Since each brand pit is in the automatic traveling area of the automatic grab crane 1, while weighing with the crane scale of the manual riff mag crane 2, the multiple receiving hoppers 3 are temporarily installed at the scrap receiving site R, or below the receiving hopper 3. Directly into the bottom openable scrap box 4 of
The scrap box 4 is conveyed to the side of the designated receiving pit and put on standby.

After the automatic loading of scraps by the automatic grab crane 1 or after the completion thereof, the pre-loading scrap box 7 is lifted by the hanging hooks 1a arranged in parallel on the automatic grab crane 1 to a predetermined address of the designated receiving pit. The scraps are collectively received in the lightweight scrap pit LP by opening the bottom.

The manual riff mag crane 2 completes the reception of a predetermined amount of scrap in the electric furnace operating cycle (Tap to Tap), and then loads the above-described heavy scrap for automatic loading into the scrap box 7 for pre-loading. Perform the pre-loading work again.

The scrap carried in by the dump truck 11 is once received in the dumping pit 12 provided in the receiving place R, and the manual riff mag crane 2 receives the scrap when necessary.

In the scrap automatic loading and receiving method according to the first embodiment, for example, the electric furnace operating cycle
An example of the time schedule when (Tap) is set at 40-minute intervals will be described in detail with reference to the time chart shown in FIG. 6 and the plan view of FIG.

As shown in the drawing, the work in the scrap yard Y is performed by receiving the scrap by the manual riff mag crane 2 and preloading the heavy scrap, transporting the light scrap by the scrap box carrier 5 and the light scrap pit by the automatic grab crane 1. It consists of receiving the LP, loading it into the weighing hopper 6, and discharging scrap from the weighing hopper 6 to the electric furnace insertion basket 8.

First, the manual riff mag crane 2 receives light scraps through the receiving hopper 3 or directly into the scrap box 4 (a) and also receives heavy scraps into each pit (b), and preloads heavy scraps at a predetermined time. Start pre-loading (c) to pre-load the loading scrap box 7. Then, when the pre-loading is completed, the pre-loading scrap box 7 is moved to the automatic operation area, and at the same time, the lightweight scraps are transferred to the receiving hopper 3 through the receiving hopper 3.
Alternatively, the scrap box 4 is directly received (a) and the heavy scrap is received in each pit (b). Further, the scrap thrown into the scrap box 4 is carried by the scrap box carrier 5 on which the scrap box 4 is mounted to the side of the predetermined lightweight scrap pit LP for each brand (d).

On the other hand, the automatic grab crane 1 loads the lightweight scrap from the lightweight scrap pit LP into the weighing hopper 6 in parallel with the scrap receiving work by the manual riff mag crane 2 (e), and at the same time, performs the advance operation by the manual riff mag crane 2. The loaded heavy scraps are loaded from the pre-loading scrap box 7 into the weighing hopper 6 according to the designated arrangement order. Then, at the time when the loading of the scrap into the weighing hopper 6 is completed, the scrap box transport cart 5 transported to the side of each lightweight scrap pit LP.
From there, the bottom openable scrap box 4 is lifted and transferred to the specified address in each pit and received (f). When receiving this lightweight scrap, the scrap loaded in the weighing hopper 6 is discharged to the electric furnace insertion basket 8.
(g). The above work is performed at the same time for both the A yard and the B yard.

In the electric furnace operation, scrap preheating is performed as long as possible. Therefore, when it is necessary to discharge the scrap into the electric furnace charging basket and insert it into the electric furnace in a short time, a large amount of scrap can be produced. In order to load the scrap in the shortest possible time, the total amount of the scrap inserted into the electric furnace may be divided first, and the preloading may be performed simultaneously in a plurality of yards.

As described above, according to the first embodiment,
Regarding automatic loading of scrap, first divide it into a manual riff mag crane 2 or an automatic grab crane 1 that can perform optimum handling depending on the size of the bulk density of scrap, and perform the shortest and most efficient scrap handling, and most of the loading time The grab crane handling, which occupies the light-weight scrap, is automatically loaded, which makes it possible to significantly reduce the loading and receiving time and labor. In addition, the number of cranes installed can be reduced and the facility cost can be reduced by replacing the accepted scrap with the manual riffmag crane transfer and the trolley transfer.

Further, according to the first embodiment, the heavy scrap to be handled by the manual riff mag crane 2 is prepared in advance and efficiently incorporated into the automatic loading sequence, and the scrap is accepted by the manual riff mag crane 2 and the automatic riff mag crane 2. The system is capable of efficiently loading the scrap yard Y as a whole by efficiently combining the grab cranes 1 and receiving scraps at the same time efficiently. It is possible to efficiently wrap a plurality of works in the scrap yard Y and to perform manual receiving work. The optimum maximum operating rate of the crane can be achieved by combining the and automatic loading work, and a large amount of scrap can be loaded and received in a short time.

In the first embodiment described above, loading and receiving of heavy scraps by the manual riff mag crane 2 is carried out manually, but loading can also be carried out automatically as in the second embodiment described later. And
It may be selected appropriately.

Next, a second embodiment of the present invention is a plan view showing the entire scrap yard shown in FIG. 7, a flow chart showing an automatic loading command in the scrap yard shown in FIG. 8, and the same time shown in FIG. Description will be given based on an example of a chart.

As the layout of the scrap yard Y in the second embodiment, a weighing hopper 6 is installed in the center of the yard Y, and a lightweight scrap pit LP having a small bulk specific gravity and a heavy scrap pit HP having a large bulk specific gravity are provided on both sides of the weighing hopper 6. Side-by-side installation of scraps on both sides of the lightweight scrap pit LP and heavy scrap pit HP
Is arranged so that the loading and receiving of the light weight scraps as well as the loading and receiving of the heavy scraps are automatically operated, and only the scrap carried into the scrap yard by the vehicle is manually operated. With this configuration, it is possible to reduce the lengthwise distance of the scrap yard Y and to automatically load and receive heavy scrap without any interference between the automatic crane and the manual crane.

In the scrap yard Y, the heavy-weight scrap pit HP located in the lower part of the drawing is A yard, the light-weight scrap pit LP in the central part is B yard, and the light-weight scrap pit LP is located in the upper part of the drawing. It is a C yard. The same components as those in the first embodiment described above are designated by the same reference numerals and detailed description thereof will be omitted. Furthermore, the arrangement of A, B, C yards is also B, A, C, etc.
Optimal alignment is possible depending on the formulation plan.

As shown in the figure, the main equipment of the scrap yard Y in the second embodiment is, among the scraps of a plurality of brands, a lightweight scrap pit LP for storing a lightweight scrap and a heavy scrap pit for storing a heavy scrap. HP, a grab handling automatic crane 1 with a grab bucket (hereinafter, simply referred to as an automatic grab crane) with a hanging hook 1a for a scrap box for loading and receiving the lightweight scrap in the lightweight scrap pit LP, and the above weight Riffmag handling automatic crane 13 for loading and receiving heavy scraps in the scrap pit HP (hereinafter, simply referred to as automatic riffmag crane) and a scraper for receiving heavy scraps and lightweight scraps carried into the scrap yard Y. Accepted for manual lifting magnet crane 2A,
2B (hereinafter, simply referred to as a manual riff mag crane), a scrap receiving hopper 3B for temporarily receiving scrap by the manual riff mag crane 2B, a bottom opening / closing scrap box 4B provided under the receiving hopper 3B, and an A yard. Box-shaped large scrap box 4A provided in
Scrap box building replacement carriages 5A, 5B for moving B from the manual operation area to the automatic operation area (not shown because it is the same as the scrap box carrier carriage 5 in the first embodiment)
And a weighing hopper 6 for weighing the light weight scrap and the heavy scrap loaded by the automatic grab crane 1 and the automatic riff mag crane 13 described above, and between the weighing hopper 6 and the electric furnace E, A carrier truck 9 for carrying the furnace charging basket 8 is provided so as to be freely movable. It should be noted that the relationship between the receiving hopper 3B, the scrap box 4B, and the pallet truck 5B, the relationship between the bottom opening / closing scrap box 4B and the hanging hook 1a arranged in parallel with the automatic grab crane 1, and the weighing hopper 6 and the electric furnace charging The relationship between the basket 8 and the carriage 9 is the above-mentioned first.
Since the configuration is the same as that of FIGS. 2 to 4 in the embodiment, the description thereof will be omitted.

In addition, in the second embodiment, in principle, the automatic grab crane 1 automatically runs and traverses on the lightweight scrap pit LP, and the automatic riff mag crane 13 automatically runs on the heavy scrap pit HP. The traverse and receiving manual riff mag cranes 2A and 2B are configured to traverse and traverse on the scrap receiving site R by a manual operation of a crane operator.

Further, similarly to the above-described first embodiment, a light weight scrap having a small bulk specific gravity is handled by using a grab crane, and a heavy scrap having a large bulk specific gravity is handled by using a riff mag crane. In the second embodiment, Automatic loading of the weighing hopper 6 by the automatic grab crane 1 and automatic loading of the weighing hopper 6 by the automatic riff mag crane 13 are performed. Then, the scrap loaded in the weighing hopper 6 provided in each yard is discharged to the charging basket 8 and is transferred to the electric furnace E by the charging basket transfer carriage 9.

The automatic loading and receiving of the second embodiment having the above configuration will be described in detail with reference to the flow chart showing the automatic loading command in the second embodiment shown in FIG. 8 and the plan view of FIG.

First, as shown in the figure, when the scrap yard management room issues a command for automatic loading of scrap, A
Automatic loading of scrap is started simultaneously in all of ~ C yards. First, scraps of a plurality of brands are sorted according to the specified division loading arrangement sequence, and in A yard, automatic riff mag crane 1
Heavy Rough Mag Crane 13 using 3
Is loaded into the weighing hopper 6 while being weighed by the crane scale provided in the above, and in the B yard and the C yard, the automatic scrap grab crane 1 is used to weigh the lightweight scrap into the weighing hopper 6 while weighing the scrap with the crane scale provided in the grab crane 1. Then, while the weighing hoppers 6 weigh, the scraps are automatically loaded into the weighing hoppers 6 from each brand pit sequentially.

The adjustment of the loading weight in each weighing hopper 6, the adjustment of the designated loading amount into the electric furnace insertion basket 8, and the method of charging scrap into the electric furnace E are the same as those in the first embodiment described above. Omit it.

Next, regarding the acceptance of scrap into the scrap pit, the unloading from the long-body vehicle 10 (see FIG. 7) carried into the scrap yard Y is performed at the receiving stations R arranged on both sides of the scrap yard Y. In the above, all are performed by the manual riff mag cranes 2A and 2B by the crane operator's manual mass control operation.

First, the heavy scrap having a large bulk specific gravity is A
In the yard, the large-scale scrap box 4A on the building-replacement truck 5A is directly loaded, and the building-replacement truck 5A conveys it to the automatic operation area for standby.

On the other hand, the lightweight scrap having a small bulk specific gravity is
In the B and C yard, a fixed amount is received at each receiving site R while weighing with the crane scale provided in the manual riff mag crane 2B.
Is temporarily received by a plurality of receiving hoppers 3B installed in, and is delivered to the bottom openable-closed scrap box 4B via the receiving hoppers 3B, or is directly received in the scrap box 4B, and then the scrap box 4B is transferred to the rebuilding cart. 5B conveys to the automatic operation area and makes it stand by.

When the automatic loading of the heavy scrap by the automatic riff mag crane 13 is completed, the heavy scrap received in the scrap box 4A is directly lifted by the riff mag of the automatic riff mag crane 13,
The heavy scrap is directly received at the designated address in the designated receiving pit. On the other hand, for lightweight scrap, the automatic grab crane 1
When the automatic loading of scraps by the above is completed, the scrap box 4B is lifted by the hanging hooks 1a arranged in parallel on the automatic grab crane 1, and the bottom is opened at the designated address of the designated receiving pit to collectively discharge the lightweight scraps. Accept in the pit LP.

If there is also lightweight scrap in the A yard of the automatic riff mag crane, a bottom openable scrap box is used for batch dispensing, so a lifting hook is also installed on the automatic riff mag crane, and the receiving r It has a hopper.

In the method for automatically loading and receiving scraps according to the second embodiment, similar to the above-described first embodiment, for example, a time schedule is shown when the electric furnace operating cycle (Tap) is set to 40 minutes. 9 and the plan view of FIG. 7.

As shown in the figure, the work of the scrap yard Y in the second embodiment is performed by the manual riff mag crane 2A,
Receipt of scrap by 2B, scrap boxes 4A, 4B by scrap box building replacement carts 5A, 5B
Transport of the heavy scraps into the pit HP by the automatic riff mag crane 13 and loading into the weighing hopper 6, receiving of the lightweight scraps into the pit LP and loading into the weighing hopper 6 by the automatic grab crane 1, electricity from the weighing hopper 6 It consists of discharging scraps into the furnace insertion basket 8.

First, the receiving manual riff mag crane 2
Light scrap (B, C yard) is received by A and 2B, via the receiving hopper 3B, or directly in the scrap box 4B.
The large scrap box 4A receives heavy scrap (A yard) together with (a) received in (a), and the scrap box pallet trucks 5A, 5B on which these scrap boxes 4A, 4B are mounted reach the automatic operation range. Transport 4A and 4B (c), (d).

In each scrap yard Y,
Even after transporting one scrap box 4A, 4B to the automatic operation area, the work of receiving scrap into the receiving hopper 3B or each scrap box 4A, 4B is continued (e), (f).

On the other hand, the automatic riff mag crane 13 loads the heavy scrap from the heavy scrap pit HP into the weighing hopper 6 (g) in parallel with the scrap receiving work by the manual riff mag crane 2A. And
When the loading of the heavy scraps into the weighing hopper 6 is completed, the scraps in the scrap box 4A transported to the side of the heavy scrap pit HP are directly lifted by the riff mag of the automatic riff mag crane 13 and received at the predetermined addresses in each pit ( h).

The automatic grab crane 1 also carries out the work (i) of loading the lightweight scraps from the lightweight scrap pit LP into the weighing hopper 6 in parallel with the scrap receiving work by the manual riff mag crane 2B. Then, when the loading of the scrap into the weighing hopper 6 is completed,
The scrap box 4B, which can be opened and closed at the bottom and is transported to the side of the lightweight scrap pit LP, is lifted up and the bottom is opened at a predetermined address of each pit to receive it in a box unit (j). This lightweight scrap can be received in its entirety in the scrap box at a time, so that the time required for receiving the heavy scrap by the automatic riff mag crane 13 can be reduced.

During the work of receiving the heavy scrap and the light scrap, the scrap loaded in the weighing hopper 6 is discharged to the electric furnace insertion basket 8 (k). The above work is carried out simultaneously in A, B, and C yards.

As described above, according to the second embodiment,
Both heavy scraps and light scraps are efficiently loaded into the weighing hopper 6 by the automatic loading sequence by the automatic riff mag crane 13 and the automatic grab crane 1, and the scrap is received by the manual riff mag cranes 2A and 2B for receiving and the automatic grab crane 1 The automatic riff mag crane 13 is efficiently combined to automatically load the entire scrap yard Y and receive the yard scrap efficiently.

Also in the second embodiment, regarding automatic loading of scraps, first, the automatic riff mag crane 13 or the automatic grab crane 1 is divided into the optimum handling depending on the bulk specific gravity of the scraps.
By performing the shortest and most efficient automatic scrap handling, it is possible to greatly reduce loading and receiving time and labor.

As described above, according to the present invention, the entire scrap yard Y is divided into an automatic operation area by the grab crane or the riff mag crane and a manual operation area, and a dedicated crane is run and traverse in each operation area. As in the conventional case, the cranes do not interfere with each other and scraps can be loaded and received.

Therefore, since the dedicated cranes perform their own work in each yard and each operating area without waiting time (play time) such as interference with each other, the operating rates of both cranes are higher than the optimum operating rate (about 70 to 75). %) Can be maintained.

By the way, in any of the above-mentioned embodiments, the address N previously attached to the lightweight scrap pit LP for each brand is given.
According to the above, the automatic grab crane 1 is controlled by a control device (not shown) so that scraps can be automatically loaded and collectively received in the pit.

That is, as shown in FIG. 1 or 7,
In the handling area by the automatic grab crane 1, a certain running / traversing route pattern is determined by using the address N attached to the pit LP, and the automatic grab crane 1 is always planarly running / traversing controlled according to this pattern. . Therefore, since loading and receiving by the automatic grab crane 1 are always performed in a flat manner, excessive peaks and valleys of scrap in the pit LP are further reduced, and more average grab crane handling is possible.
This reduces the impact of scrap peaks and valleys on the automatic loading time cycle.

Also in the second embodiment described above, the lightweight scrap pit L is added to the heavy scrap pit HP.
The same address as P is attached.

[0078]

According to the present invention, the entire scrap yard is divided into heavy scrap pits and lightweight scrap pits according to the bulk specific gravity, and the riff mag crane or grab suitable for handling is provided on each pit depending on the bulk specific gravity. A crane is installed, the scrap yard is divided into a manual operation area and an automatic operation area, and these are efficiently combined to maximize the operating rate of the crane. Therefore, the scrap yard as a whole can efficiently receive and load scrap. The scrap yard can be efficiently and efficiently automated.

Regarding the acceptance of scraps, the scraps are temporarily accepted via the acceptance hopper or directly into the scrap box and discharged from the scrap box to the pits. Space is no longer needed, and the minimum space required for a scrap yard can be achieved.

In addition, the scraps are received directly in the pits by the riff mag crane for heavy scraps with a large bulk specific gravity, and the light scraps with a small bulk specific gravity are received once via the receiving hopper or directly into the scrap box and are collectively received in each pit. In such a case, efficient scrap reception can be combined with automatic loading to enable the shortest and most efficient scrap reception for the entire yard.

Furthermore, by automatically receiving and loading heavy scraps by an automatic riff mag crane, it is possible to further accelerate the automatic loading and receiving work of scraps.

[Brief description of drawings]

FIG. 1 is a plan view showing an entire scrap yard according to a first embodiment of the present invention.

FIG. 2 is a side view showing a receiving hopper, a scrap box, and a carriage.

FIG. 3 is a front view showing a relationship between a scrap box and a hanging hook.

FIG. 4 is a front view showing a weighing hopper and an electric furnace charging basket.

FIG. 5 is a flowchart showing an automatic loading command in the scrap yard according to the first embodiment of the present invention.

FIG. 6 is a time chart showing an example of a time schedule according to the first embodiment of the present invention.

FIG. 7 is a plan view showing an entire scrap yard according to a second embodiment of the present invention.

FIG. 8 is a flowchart showing an automatic loading command in the scrap yard according to the second embodiment of the present invention.

FIG. 9 is a time chart showing an example of a time schedule according to the second embodiment of the present invention.

[Explanation of symbols]

 1 ... Automatic grab crane 1a ... Hanging hook 2 ... Manual riff mag crane 2A, 2B ... Manual riff mag crane 3 ... Receiving hopper 3A, 3B ... Receiving hopper 4 ... Scrap box 4A, 4B ... Scrap box 5 ... Scrap box carrier 5A, 5B … Building replacement cart 6… Weighing hopper 7… Scrap box 8… Charging basket 9… Charging basket Transport cart 13… Automatic riff mag crane Y… Scrap yard HP… Heavy scrap pit LP… Lightweight scrap pit R… Reception hall E… Electricity Furnace N ... Address

Claims (4)

[Claims] 1. In scrap loading work, light weight scraps are directly carried out by a grab crane, and heavy scraps are loaded in advance in a dedicated scrap box for batch loading using a manual riff mag crane and then loaded automatically by an automatic grab crane. By combining these, the scraps of the specified brand are loaded in the specified order up to the specified weight.When receiving, the heavy scrap is directly received by the manual riff mag crane directly into the pit next to the receiving place, while the light scrap is once received. Automatic loading of scrap, characterized by receiving in advance through the hopper or directly in the scrap box, waiting for pre-transportation to the side of the receiving pit, and receiving all at once during the scrap loading work of the automatic loading grab crane or after completion Acceptance method. 2. In scrap loading work, a lightweight scrap-based yard is performed by a grab crane, and a heavy-weight scrap-based yard is performed by a riff mag crane. By combining these, specified brand scraps are specified in a specified order. We automatically load up to the weight, and at the time of receiving, for lightweight scrap, once the scrap is received by the manual riff mag crane via the scrap receiving hopper or directly into the scrap box for batch transfer / delivery, wait for transfer to the automatic operation area with the building replacement truck, bulk to a predetermined pit accepted by grayed <br/> Love cranes completing automatic loading or in loading, by weight scrap to automatic operation zone receiving the scrap box on Tokawa carriage to automatic operation zone once manually lifting magnet crane conveying stand directly predetermined pitch at lifting magnet crane completing automatic loading or in loading Automatic loading and accepted method of scrap, wherein the accept to. 3. A manual riff mag crane for receiving scraps into a yard, a scrap pit roughly divided into light weight scraps and heavy scraps, and an automatic grab with a hanging hook for automatically loading scraps and delivering scraps collectively. A crane, a trolley that travels between the manual operation area and the grab crane automatic operation area, and a scrap box for batch transfer and delivery, and a receiving hopper for temporary scrap receiving are provided, and the above-mentioned automatic grab crane is placed on the lightweight scrap pit in the automatic crane operation area. An automatic loading and receiving device for scraps, characterized in that a control device for automatically controlling the grab crane is provided to load scraps into a weighing hopper and receive them into a predetermined pit. 4. A manual riff mag crane for receiving scraps into a yard, a scrap pit roughly divided into lightweight scraps and heavy scraps, an automatic grab with a hanging hook for automatically loading and delivering scraps, and An automatic riff mag crane, a pallet truck that moves between the manual operation area and the grab crane automatic operation area, and a scrap box for scrap transportation and delivery, and a receiving hopper for temporary scrap receiving are provided, and the above is placed on the lightweight scrap pit in the automatic operation area of the crane. An automatic grab crane is provided and the automatic riff mag crane is provided on a heavy scrap pit, and a control device for automatically controlling the grab crane and the riff mag crane is provided to load scrap into a weighing hopper and receive it at a predetermined pit. Skura Automatic loading and receiving equipment.