JPH064966Y2 - Work roll loading / unloading device for rolling mill - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of the Invention [0007] This invention, when replacing a work roll in a foil rolling machine or the like, for example, carries the work roll out of the machine and
The present invention relates to a work roll loading / unloading device for a rolling mill, which is used to load a replaced work roll into the machine.

Conventional technology For example, in order to replace the work rolls in a foil rolling machine, etc., first, the work rolls are carried out together with the backup rolls underneath, and the work rolls are replaced outside the machine, and then these rolls are replaced. It is necessary to carry it into the aircraft again. Conventionally, such loading / unloading work has been performed as follows. That is, as shown in FIG. 8, a pit (P2) extends in the floor (F) on the side of the rolling mill in a direction orthogonal to the rolling direction, and a work roll (2) is formed in the pit (P2). Roll tow truck (6) for loading and unloading the backup roll (3) combined with the lower part
To be equipped to run freely. Then, one end of the pulling wire (W) is connected to the roll pulling carriage (6), and the wire (W) is fixed to the front side on the unloading side to fix the pulley (P).
The work roll (2) is carried out of the machine by being pulled over the a) and the other end of the wire (W) being pulled up by the crane (C) to pull the towing carriage (6).

On the other hand, in the carrying-in work from the carrying-out state, as shown in the figure, one end of the pulling wire (W) is connected to the carrying-in side end portion (3c) of the backup roll (3) and the wire (W ) Fixed on the opposite side of the foil rolling mill (1)
By pulling the other end of the wire (W) with the crane (C) by hanging it over (Pb), the towing carriage (6) is towed and the work roll (2) is carried into the machine.

By the way, the upper end opening of the pit (P2) is closed by the pit cover (A) except when carrying in / out work.
Roll trolley for work roll loading and unloading (6)
It is necessary to relocate the pit cover (A) because it will interfere with the running of the car.

SUMMARY OF THE INVENTION However, the roll towing carriage (6) in the roll-in carriage (6) in the carry-in / take-out stroke range (L1) over the predetermined length at the carry-out initial stage and the carry-in end stage of the work roll (2) with respect to the rolling mill (1). Since the frictional force is very large and a very large traction force is required to carry it in and out, a large crane (C) must be equipped.

Further, the above-mentioned relocation work of the pit lid (A) has conventionally been carried out by hoisting and moving it using a crane, but the work is a little troublesome, which hinders rapid roll replacement work. Not only that, but there was a problem that the space around the rolling mill could not be effectively utilized because it was necessary to secure a storage place for the lid.

This invention was made in view of the above problems,
Without having to equip a large crane or make major modifications to existing equipment, the work of replacing the work rolls may not be necessary, and work rolls can be replaced easily and quickly. It is an object of the present invention to provide a work roll loading / unloading device for a rolling mill.

Means for Solving the Problems Thus, the work roll loading / unloading device of the rolling mill according to the present invention is used as a pit lid for closing the upper end opening of the pit in which the roll towing cart is arranged. A trolley which is divided in the traveling direction of the trolley and which can be expanded and contracted in association with the traveling of the trolley is used, and the trolley for pulling the roll has a pneumatic cylinder and a hydraulic cylinder jack at the initial stage of unloading and the final stage of loading. It was designed to be used together.

That is, in this invention, a pit is provided on the floor on the side of the rolling mill in a direction orthogonal to the rolling direction, and a roll towing truck for loading and unloading work rolls into and out of the rolling mill is provided in the pit. A work roll loading / unloading device for a rolling mill, which is equipped so as to be freely movable and is provided with a pit lid for closing the upper end opening of the pit, wherein the pit lid is in the pit length direction. And the divided lids are sequentially arranged in the length direction of the pit and can be expanded and contracted between an extended state and a stored state in which the top and bottom sides of the pits are substantially vertically overlapped with each other. The roll towing carriage is operated in conjunction with the traveling of the towing carriage, and the roll towing carriage has a carry-in state in which a work roll is set in the rolling mill and a carry-out state in which the work roll is carried out of the machine. While it is towed by the traction cable connected to the pneumatic cylinder over the entire loading and unloading stroke between the loading and unloading strokes, it is automatically towed with the hydraulic cylinder jack in the loading and unloading stroke range over the specified length at the initial and final loading stages. A work roll loading / unloading device of a rolling mill is featured as described above.

Action When the work roll is not loaded and unloaded with the roll towing truck on the rolling mill side, the pit lid is in an extended state in which the adjacent split lids are sequentially arranged in the pit length direction. Block the pit. On the other hand, when the work rolls are carried in and out, the pit cover is expanded and contracted in association with the traveling of the roll towing carriage, and when the work rolls are completed, the split cover bodies are in a storage state in which they are stacked substantially vertically on the pit tip side.

The roll towing trolley is reliably towed by a large traction force in combination with a hydraulic cylinder jack automatically in the carry-in / carry-out stroke range over a predetermined length at the initial stage of carrying-out and the final stage of carrying-in of the work roll with respect to the rolling mill. On the other hand, in the other loading / unloading strokes, it is quickly towed by the tow cable connected to the pneumatic cylinder.

Embodiment Hereinafter, the invention will be described based on illustrated embodiments.

In FIG. 1, (1) is a foil rolling machine in which a pair of work rolls (2) and backup rolls (3) above and below the work rolls are combined, and a base portion (4) thereof is provided on a floor (F). It is installed in the pit (P1).

In the foil rolling machine (1), a pair of upper and lower work rolls (2) and a backup roll (3) combined with the lower part of the work rolls (3) are arranged along the axis line so that the work rolls (3) can be exchanged outside the machine. It is designed to be taken in and out along the direction. For such loading and unloading, a pit (P2) is extended on the floor (F) on the side of the foil rolling machine in a direction orthogonal to the rolling direction, and a pair of rails (5) (5) (provided in the pit (P2) ( 5) A roll towing trolley (6) is movably mounted on the top.

A pit cover (A) for closing the pit (P2) when the work roll is not carried in and out is arranged at the upper end opening of the pit (P2). As shown in FIGS. 1 to 3 and 6, the lid body (A) is 5 in the length direction of the pit (P2).
It consists of divided lids (30) (31) (32) (33) (34), and the heights of the rolling mills (1) are sequentially different from each other and the end portions are overlapped. It is placed in a closed state. The split lid (34) on the pit tip side is fixed to the floor (F),
The other split lids (30) (31) (32) (33) are mounted on the lid rails (36) provided on both sides of the truck rail (5) by the wheels (35) attached to the lower surface. It is designed to run. Among the movable split lid bodies (30), (31), (32) and (33), the split lid body (30) on the rolling mill (1) side is connected and fixed to the front end of the roll towing carriage (6). , So that it can move as the carriage (6) travels. In addition, each split lid (3
0), (31), (32), (33), and (34) are arranged to overlap each other, but when the end parts are overlapped, the locking parts (not shown) are locked. It is designed not to be separated from each other.

Thus, the pit lid (A) consisting of the divided lids (30) (31) (32) (33) (34) is used as the roll towing truck (6) travels in the roll pulling direction. When the work roll unloading is completed, the pits (P) are stacked one after another from the side of the divided lids (30) connected to (6), as shown by the dashed line in FIG.
2) The tip end side is in a stored state in which it is almost vertically overlapped. On the other hand, as the carriage (6) travels in the carrying-in direction from its stored state, it is sequentially pulled out from the divided lid bodies (30) connected to the carriage (6), and as shown by the solid line in FIG. The doughs are stretched to overlap each other. By adopting the pit lid (A) that can be expanded and contracted in conjunction with the traveling of the roll towing carriage (6) in this way, a crane is used as in the prior art before the work roll (2) replacement work. It is possible to omit the work of lifting and removing the lid body and refitting the lid body, so that the work roll replacement work can be performed quickly and safely.

The roll towing trolley (6) has an engaging protrusion (6
a), and the engaging protrusion (6a) is formed at the lower end of the discharge side end (3a) of the lower backup roll (3).
It is fitted to b). Then, the roll (3) and the work roll (2) are towed out of the machine while the unloading side end (3a) of the backup roll (3) is supported by the trolley (6). It is designed to be carried into the cabin.

A traveling roller is attached to the lower end of the loading side end (3c) of the backup roll (3), and the roll (3) is mounted on the rail (4) at the upper end of the base (4) of the rolling mill (1) at the time of loading and unloading. It is designed to be able to run along 4a). However, in the roll setting state, both lower end portions (3d) of the loading / unloading side end portions (3a) (3c) of the backup roll (3) are directly placed on the upper end portion (4b) of the base portion (4). Has been done. Therefore, the frictional force is very large in the loading / unloading stroke range (L1) of about 250 mm at the loading / unloading initial stage and the loading / unloading final stage where the two come into contact with each other, and a large traction force of about 3000 Kgf is required for loading / unloading. To do. On the other hand, in the other loading / unloading stroke range (L2), a relatively small traction force of about 50 to 150 Kgf is sufficient. Therefore, in this embodiment, the pulling in the loading / unloading stroke (L1) of about 250 mm at the beginning of loading and the end of loading is mainly performed by the hydraulic cylinder jack (7) having a pulling force of 5 tons, while other than that. Pneumatic cylinder (8) with relatively small traction force but high traction speed for traction in the loading / unloading stroke range (L2)
I'm trying to do it alone.

As shown in FIG. 4, the hydraulic cylinder jack (7) has rails (5) for traveling the roll towing carriage (6).
It is installed at the bottom of the pit (P2) between (5) and close to the foil rolling mill (1) side.

As shown in FIG. 2, the jack (7) is engaged with the inner surface of the pulling engagement piece (6b) provided on the tip of the roll pulling carriage (6) so as to project downward. A fixed engagement claw (7a) is provided, and the undulating engagement claw (7a) is provided on the carry-out side of the engagement claw (7a) with a space to allow the engagement piece (6b) to be fitted with a slight clearance. (7b) is provided.

Thus, in the stroke range (L1) at the initial stage of roll unloading, the undulating engagement claws (7b) are in the collapsed state, and the fixed engagement claws (7a) engage the roll traction carriage (6). The roll pulling carriage (6) is pulled in the carry-out direction by being engaged with the inner surface of the pawl (6b). On the other hand, similarly, in the stroke range (L1) at the end of roll loading, the undulating engagement claw (7b) is erected, and this engagement claw (7b) acts as the engagement piece (6b) of the roll towing carriage (6). By being engaged with the outer side surface, the roll towing carriage (6) is pulled in the loading direction.

As shown in FIG. 3 and FIG. 4, the pneumatic cylinder (8) is located between the rails (5) (5) for traveling of the roll towing carriage (6) and the hydraulic cylinder jack (7). It is installed in the lateral position of. This cylinder (8) is the running stroke length of the roll towing carriage (6).
80m in diameter with the same length of 3000mm as (L1 + L2)
Pulleys (9) of m size and provided at both ends
It is designed to drive the traction cable (10) that is hung on (9). As shown in FIGS. 1 and 3, the cable (10) is connected to a cable connecting member (6c) provided on the roll towing carriage (6) so as to project downward. Then, the traction cable (10) is driven along with the operation of the pneumatic cylinder (8), and the roll traction carriage (6)
Is towed over the entire loading / unloading stroke range (L1 + L2).

The operation of the hydraulic cylinder jack (7) and the pneumatic cylinder (8) will be described based on the circuit diagram shown in FIG.

When the work roll (2) is set in the rolling mill (1), the work roll (2) is attached to the roll towing carriage (6),
Alternatively, a striker (1
The switching valves (13) and (14) are turned on by 1) and (12). When the air pump (15) is operated in this state, the air reaches the air-oil conversion pump (16) and the pump (16) is operated. In this state, when the operation lever (18) of the switching valve (17) is tilted to the left, air is supplied from the air pump (15) to the pneumatic cylinder (8), the working cylinder (19) of the undulating engagement piece (7b), and the hydraulic jack. It is fed to each switching valve (20). As a result, air is supplied from the right end side of the cylinder (8), the pulling cable (10) of the cylinder (8) is operated in the carry-out direction, and the roll pulling carriage (6) connected to the cable (10) is connected. Is towed in the carry-out direction. At the same time, the undulating engagement piece (7b) of the jack (7) is laid down, and the hydraulic jack switching valve (20) is activated to feed oil from the left side of the hydraulic cylinder jack (7). When the jack (7) is operated in the carry-out direction and the fixed engagement claw (7a) is engaged with the pulling engagement piece (6b) of the roll pulling carriage (6), the carriage (6) Is towed in the carry-out direction. As described above, when the roll towing truck (6) is towed by the hydraulic jack (7) and the pneumatic cylinder (8) over the predetermined stroke range (L1), the strikers (11) and (12).
Is removed from the switching valves (13) and (14), the air supply to the air-oil conversion pump (16) is cut off, and the pump (16) stops. Therefore, in the subsequent carry-out stroke (L2), the carriage (6) is pulled only by the pneumatic cylinder (8).

Next, in order to perform the loading operation from the unloading state, the operation lever (18) is tilted to the right. Then, air from the air pump (15) is sent to the cylinder (8) from the left end side thereof to carry in the cylinder (8), and the traction cable (10) connected to the cylinder (8). The roll towing cart (6) is towed in the loading direction. When the carriage (6) is pulled to a predetermined position, the striker (1
1) (12) turns on the switching valve (13) for operating the hydraulic pump and the engaging claw switching valve (14) of the jack (7) to activate the air-oil conversion pump (16) and, at the same time, the jack. (7)
The undulating engagement claws (7b) are raised and engaged with the towing engagement pieces (6b) of the carriage (6). Further, by operating the jack switching valve (14), oil is fed to the right side of the jack (7) whose switching valve (20) is switched. In this way, the jack (7) is operated in the carrying-in direction, and the roll pulling carriage (6) is pulled in the carrying-in direction together with the pneumatic cylinder (8). In the figure, (21) is an air booster that is activated when the pulling force of only the cylinder is insufficient, and is activated by pressing the push button (22). (23) is a switching valve for emergency stop,
It is designed to be stopped by tilting the operating lever (24) to the left.

In the above embodiment, in order to expand and contract the pit cover (A) in association with the traveling of the roll towing truck (6), the split lid (30) on the rolling mill (1) side is moved to the roll towing truck. Although shown connected to (6), other than the above, for example, the above-mentioned split lid (30)
May be connected to the pulling wire (10) of the pneumatic cylinder (8).

Further, the present invention can be applied to rolling machines other than the foil rolling machine shown in the embodiment.

Effect of the Invention The work roll loading / unloading device of the rolling mill according to this invention is
As described above, as a pit cover that closes the upper end opening of the pit in which the roll tow truck is arranged, it is divided in the traveling direction of the roll tow truck and is expandable and contractible in conjunction with the traveling of the truck. Since the conventional one is used, the pit lid is lifted by a crane and removed to another location before the work roll replacement work as before, while the work roll is replaced and the lid is refitted into the pit. The troublesome work of returning the work roll can be omitted, and the work roll replacement work can be performed quickly and safely.
Further, since it is not necessary to move such a pit cover, it is not necessary to newly secure a moving place, and the space around the rolling mill can be efficiently used.

In addition, it is possible to complete the modification work in a short construction period without significantly modifying the existing pit.

Furthermore, the roll towing trolley automatically uses a hydraulic cylinder jack to ensure a large traction force in the loading and unloading stroke range that requires a large traction force over the specified length at the initial stage of unloading work rolls and the final stage of unloading work rolls to the rolling mill. On the other hand, in the other carrying-in / out stroke, it is quickly towed by the towing cable connected to the pneumatic cylinder. Therefore, it is not necessary to equip a large-sized crane as in the case where the work roll is carried in and out by pulling the other end of the pulling cable having one end connected to the roll pulling carriage with the crane as in the conventional case, and it is quick. In addition, the carry-in / out can be surely completed, and the workability can be improved.

[Brief description of drawings]

1 to 7 show an embodiment of the present invention, FIG. 1 is a side view showing a schematic structure of the device, FIG. 2 is a side view showing an operating state of a hydraulic cylinder jack, and FIG. Is a side view showing the operating state of the pneumatic cable cylinder, FIG.
The figure is a plan view of the pit showing a state in which the roll towing carriage and the pit cover are removed, FIG. 5 is a cross-sectional view taken along the line VV of FIG. 1, and FIG. 6 is a stack of the pit cover. FIG. 7 is a side view of the end portion showing the housed state, and FIG. 7 is a drive circuit diagram of the hydraulic cylinder jack and the pneumatic cylinder. FIG. 8 is a side view showing a conventional loading / unloading device. (1) ... Rolling machine, (2) ... Work roll, (3) ... Backup roll, (6) ... Roll towing carriage, (7) ...
Hydraulic jack cylinder, (8) ... Pneumatic cylinder, (10)
… Tow cable, (30) (31) (32) (33) (34)… Split lid,
(A) ... Pit cover, (P2) ... Pit.

Claims (1)

[Scope of utility model registration request] 1. A pit (P2) is provided on a floor (F) on the side of a rolling mill (1) in a direction orthogonal to the rolling direction, and the pit (P2) is formed.
A roll towing trolley (6) for loading and unloading the work roll (2) to and from the rolling mill (1) is movably equipped in (P2), and the upper end opening of the pit (P2) is also provided. In a work roll loading / unloading device for a rolling mill, which is provided with a pit lid (A) for closing the pit, the pit lid (A) is divided in the longitudinal direction of the pit (P2) and , These split lids (30) (31) (32) (33) (34)
Can be extended and retracted between a stretched state in which the pits are sequentially arranged in the length direction of the pit (P2) and a stored state in which the pit tip end side is substantially vertically overlapped, and the extension and contraction operation is performed by the roll towing truck (6) The roll towing trolley (6) is carried in and out of the rolling mill (1) with the work rolls (2) set therein. While being pulled by the traction cable (10) connected to the pneumatic cylinder (8) over the entire loading / unloading stroke (L1 + L2) between loading and unloading state, loading and unloading for a predetermined length at the initial stage of loading and unloading Stroke range (L
In 1), it is automatically pulled together with the hydraulic cylinder jack (7).
Work roll loading / unloading device for rolling mill.