JP4279908B2 - Billet transport method using portal crane - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transfer method of the billet by portal cranes, in particular, in the stock yard, billet is transferred object (herein, sometimes simply referred to as "transferred object", "billet".) The present invention relates to a billet conveying method using a portal crane that can efficiently convey the billet .
[0002]
[Prior art]
Conventionally, for example, in rolling mills, wire drawing factories, etc., billets carried by trucks to the stockyard entrance are lifted by trolley lifting magnets installed on portal cranes installed in the stockyard. A portal crane is run to transport the billet to a predetermined position in the stockyard for storage.
[0003]
[Problems to be solved by the invention]
Billets are usually transported by a portal crane installed in this stockyard by lifting up the number or weight of billets that can be lifted at once with a lifting magnet of the trolley, and running the portal crane each time to stock the billet. It is transported to a predetermined position in the yard.
[0004]
By the way, according to the conventional billet transport method, there is a limit to the number or weight of billets that can be lifted at one time by the lifting magnet of the trolley. The number of times of reciprocating is increased, and coupled with the fact that other operations are hindered by the traveling of the portal crane, there is a problem that operations such as billet transportation cannot be performed efficiently. This tendency is particularly noticeable in portal cranes that cover a large area such as a billet stockyard because it takes time to reciprocate between the stockyard entrance and the billet storage position. It was appearing.
[0005]
In order to shorten the time required for this reciprocation, it is necessary to increase the traveling speed of the portal crane. However, the portal crane installed in the billet stockyard is large and has a very large billet load. In addition, it is difficult to increase the traveling speed of the portal crane in terms of safety and the like because it conveys unstable objects.
[0006]
The present invention reduces the number of times that a portal crane reciprocates between required positions in order to transport an object to be transported in view of the problems of the portal crane installed in the conventional billet stock yard. It is an object of the present invention to provide a billet transport method using a portal crane that can efficiently transport a transported object.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the billet transport method using the portal crane according to the present invention is to establish a support column on a carriage traveling on a crane traveling rail and hang a girder on the support column over the stock yard and its entrance. A trolley provided with a lifting magnet is disposed so as to be movable along the moving rail laid over the entire length of the upper surface of the girder , and at least along the moving rail laid at the lower portion along the girder. movable within the width of the stockyard transported object, a disposed billet conveying method according to portal crane temporary table car with a provisional table of the billet is transferred object, the stockyard receipts port The billet carried in the container is placed on the temporary table using the lifting magnet of the trolley, and the temporary storage cart on which the billet is placed and the separate billet are lifted. The trolley suspended by the magnet is moved along each moving rail, and the portal crane is moved along the crane traveling rail, and the temporary table and the trolley are moved to the required positions in the stock yard. The billet suspended on the lifting magnet of the trolley at that position and the billet placed on the temporary table are lowered to the stockyard using the lifting magnet of the trolley, and when the trolley moves, hanging billet to lifting magnet, characterized in that to allow passing through the upper position of the billet placed on the provisional table.
[0008]
As a result, in addition to suspending the object to be transported on the trolley of the portal crane, it is possible to place the object on a temporary table placed on the girder of the portal crane. The number and weight of possible objects to be conveyed can be increased several times, and the number of times the portal crane reciprocates between required positions for conveying objects to be conveyed can be reduced.
In addition, when the object to be transported is suspended from the trolley, the trolley is configured to be able to pass through the upper position of the temporary table on which the object to be transported is placed. The lowered transported object can be transported to a required position regardless of the transported object placed on the temporary table.
[0009]
Then, more the provisional table vehicle laying rails for moving so as to be movable in the width of the stockyard at least objects to be conveyed, a time and transported object required for stacking the transported object to provisional table The time required for transporting in the width direction of the stockyard can be shortened.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a billet conveying method using a portal crane according to the present invention will be described below with reference to the drawings.
[0011]
The portal crane is installed in the stock yard S of the billet Bi. The crane traveling rail 10 is laid so as to cover the entire stock yard S at a predetermined interval, and the crane traveling rail 10 is placed on the crane traveling rail 10. Supporting carriages 1 and 1 are respectively provided with support posts 2 and 2, brackets B and B are projected inside the support support 2 and 2, and girder 3 is interposed between the support posts 2 and 2 via the brackets B and B. 3 is configured.
[0012]
Brackets B1 and B1 project from the lower outside of the girders 3 and 3, and moving rails 4 and 4 having an I-shaped cross section are laid along the girders 3 and 3 via the brackets B1 and B1. On the rails 4 and 4, the temporary carriage 5 including the temporary rack 52 for the billet Bi is movably disposed.
In this case, the rails 4 and 4 are laid so that the temporary carriage 5 can move at least within the width L of the stock yard S of the billet Bi .
[0013]
In addition, on the upper surfaces of the girders 3 and 3, as in the conventional case, the moving rails R and R are laid along the girders 3 and 3 over the entire length, and the moving rails R and R are connected to the wires. A trolley 7 provided with a plurality of lifting magnets 6 is movably disposed via W and a suspension beam 8.
Thus, by arranging a plurality of lifting magnets 6 along the longitudinal direction of the suspension beam 8, the long billet Bi can be stably adsorbed and held.
[0014]
In this case, as shown in FIGS. 4 to 9, the temporary carriage 5 includes temporary carriage frames 51 and 51 that are movably supported by the moving rails 4 and 4 each having an I-shaped cross section, and the temporary carriage frames 51 and 51. A temporary mounting table 52 that is suspended and supported between the mounting frame frames 51 and 51 and on which a plurality of billets Bi can be mounted, and a travel drive device that moves the temporary mounting cart 5 along the moving rails 4 and 4. 53 and a traveling wheel 54 that is rotationally driven by the traveling drive unit 53 and disposed so as to sandwich the moving rail 4 having an I-shaped cross section from both sides.
[0015]
As shown in FIG. 7, the traveling wheel 54 is rotatably supported via a bearing 54 </ b> B on the tip side of each of the opposed shafts 54 </ b> S and 54 </ b> S provided in a cantilever manner on the temporary carriage frame 51. A gear 54G having a larger diameter than the wheel diameter is integrally disposed outside the wheel 54H that contacts the lower piece of the I-shaped moving rail 4 so that the wheel 54H and the gear 54G rotate integrally. .
[0016]
The travel drive unit 53 is disposed on the temporary carriage frame 51 and at a position away from the travel wheel 54, and includes a drive motor 53M and a speed reduction mechanism 53G driven by the drive motor 53M. A pinion 53P is formed integrally with the output shaft 53S of 53G, and this pinion 53P is meshed with a gear 54G of the traveling wheel 54 so that the traveling wheel 54 is rotationally driven.
Note that the travel drive device 53 does not have to be provided on all the travel wheels 54, and in this embodiment, the travel drive device 53 is driven in the travel direction of the temporary carriage frame 51 as shown in FIG. The driving side 54K and the driven side 54F are arranged so that the temporary carriage 5 can travel stably.
[0017]
The temporary carriage frame 51, 51, and the temporary placement stage 52 that is suspended and supported between the temporary carriage frame 51, 51 and on which a plurality of billets Bi can be placed are the lower part of the temporary carriage frame 51. The bracket 55 is provided in a projecting manner, and mounting brackets 52 </ b> B projecting from both sides of the upper portion of the temporary mounting table 52 are connected to the bracket 55 via pins 56 so as to be integrally disposed.
[0018]
By the way, in this case, the temporary carriage 5 and the trolley 7 are arranged such that the upper surface position of the billet Bi placed on the temporary placement table 52 is lower than the lower surface position of the billet Bi attracted to the lifting magnet 6 of the trolley 7. Set. As a result, the billet Bi attracted to the lifting magnet 6 and the billet Bi placed on the temporary placement table 52 are not in contact with each other while the billet Bi is suspended from the trolley 7. By moving the trolley 7, the billet Bi suspended from the trolley 7 can be transported to a required position regardless of the billet Bi placed on the temporary placement table 52.
[0019]
Next, the operation of the portal crane will be described.
The billet Bi carried to the stock yard entrance E by the truck is lifted by the lifting magnet 6 of the trolley 7 disposed on the portal crane installed in the stock yard S. In this state, the trolley 7 is placed above the temporary carriage 5. Move to position.
Thereafter, the lifting magnet 6 of the trolley 7 is lowered and the adsorption of the billet Bi is released so that the billet Bi is placed on the temporary placement table 52 of the temporary placement cart 5.
Normally, all billets Bi carried in by one truck can be placed on the temporary placement table 52 of the temporary placement cart 5 by one operation of the trolley 7.
By the way, since the billet Bi for two or three trucks or more can be placed on the temporary placement table 52 of the temporary placement carriage 5, the above operation is repeated two or three times or more, thereby temporarily placing the carriage. A large number of billets Bi are placed on the temporary placement table 52 of No. 5.
[0020]
Next, the trolley 7 is returned to the warehousing port, and then the billet Bi carried into the stock yard erection port E by the truck is lifted by the lifting magnet 6 and the portal crane is lifted in this state. Drive and move the portal crane to the required position in the stockyard S.
In this case, the temporary carriage 5 and the trolley 7 are moved along the girder 3 in accordance with the traveling of the portal crane, and when the portal crane stops at a required position, the temporary carriage 5 and the trolley 7 are moved to the stockyard. It stops at a required position in the width direction of S.
It is preferable that the stop positions of the portal crane, the temporary carriage 5 and the trolley 7 are automatically controlled so as to be in the vicinity of the empty space in the stockyard S.
When the portal crane stops at the required position in the stockyard S , first, the lifting magnet 6 of the trolley 7 is lowered, the adsorption of the billet Bi is released, and the billet Bi is lowered to the stockyard S. In addition, the lifting magnet 6 of the trolley 7 is operated in the reverse direction, and the billet Bi placed on the temporary placement table 52 of the temporary placement cart 5 is sequentially lowered to the stock yard S , and the billet Bi is stored in the stock yard S. To do.
[0021]
As mentioned above, although the billet conveyance method by the portal crane of this invention was demonstrated based on the Example installed in the stockyard S of billet Bi, this invention is the object to be conveyed especially a heavy article. It can be widely applied to cases and portal cranes covering a vast area.
[0022]
【The invention's effect】
According to the billet transport method using the portal crane of the present invention, in addition to suspending the object to be transported on the trolley of the portal crane, the object to be transported is placed on a temporary table placed on the girder of the portal crane. The number and weight of the transportable objects that the portal crane can transport at a time can be increased several times, and the number of times that the portal crane reciprocates between the required positions to transport the transported objects. Can be reduced. Thereby, the conveyance efficiency of a to-be-conveyed object can be improved safely, without raising the traveling speed of a portal crane.
In addition, when the object to be transported is suspended from the trolley, the trolley is configured to be able to pass through the upper position of the temporary table on which the object to be transported is placed. The lowered transported object can be transported to a required position regardless of the transported object placed on the temporary table.
[0023]
In addition, a moving rail is laid along the girder, and a temporary carriage provided with a temporary placement table for the object to be conveyed is movably disposed on the movement rail. The time required to load the object to be transported on the temporary table and the time required to transport the object to be transported in the width direction of the stockyard by laying the moving rail so that it can move within the width of the stockyard. Can be further shortened.
[Brief description of the drawings]
FIG. 1 is a front view showing an entire portal crane to which a billet conveying method using a portal crane according to the present invention is applied .
FIG. 2 is a side view of the same.
FIG. 3 is a plan view of the same.
FIG. 4 is a front view showing a temporary carriage.
FIG. 5 is a plan view of the same.
FIG. 6 is a side view of the same.
FIG. 7 is a partially broken front view showing a driving device for a temporary carriage.
FIG. 8 is a plan view showing a temporary carriage driving device.
FIG. 9 is a side view of the same.
FIG. 10 is a front view showing a hanging beam provided with a lifting magnet.
[Explanation of symbols]
1 Cart 2 Strut 3 Girder 4 Moving Rail 5 Temporary Carriage 6 Lifting Magnet 7 Trolley 8 Hanging Beam
S Stockyard
E Stockyard entry

Claims (1)

A strut (2) is established on a carriage (1) traveling on a crane traveling rail (10), and a girder (3) is placed on the strut (2) over a stock yard (S) and its entrance (E). over pass, disposed trolley (7) equipped capable of lifting magnet (6) moves along the movement rails were laid over the entire length of the upper surface (R) of the girder (3), said girder (3 ) Along the rail for movement (4) laid along the lower part thereof, at least within the width (L) of the stock yard of the object to be conveyed, the temporary placement table (52 ) of the billet (Bi) as the object to be conveyed ) a provisional table vehicle (5) an arrangement the transfer method of the billet by portal crane with a lifting magnet stockyard goods receipt opening (E) to the carrying billet (Bi) a trolley (7) (6) is used to place a temporary table (52 And a temporary trolley (5) on which the billet (Bi) is placed and a trolley (7) in which the billet (Bi) is separately suspended by a lifting magnet (6), 4), respectively, and the portal crane is moved along the crane traveling rail (10) to move the temporary table (52) and the trolley (7) in the stock yard (S). The billet (Bi) suspended on the lifting magnet (6) of the trolley (7) and the billet (Bi) placed on the temporary table (52) at the position are moved to the lifting magnet (7). thereby to lower the stockyard (S) using a 6), a suspended billet lifting magnet (6) of the trolley (7) when the trolley (7) moves Bi) is, billet conveying method according to portal cranes, characterized in that to allow passing through the upper position of the billet was placed on the provisional table (52) (Bi).

Images