JP4533231B2 - Steel strip production equipment and hot dipping equipment - Google Patents

Description

  The present invention relates to a steel strip production facility and a hot dipping facility for the steel strip.

  For example, in the steel sheet manufacturing process, the steel sheet is cold-rolled and annealed according to the form of the final product and the facility conditions of the factory, and then the packing process for carrying out is performed. There is a process in which a hot dipping process is performed after the rolling process and the annealing process, followed by a packing process.

  The former steel sheet manufacturing process is performed using, for example, a cold rolling / annealing line that continuously performs cold rolling and annealing, and a manufacturing line having a packaging line adjacent thereto.

  The latter steel sheet manufacturing process includes, for example, a cold rolling line for cold rolling, a continuous hot dipping line for continuous annealing and hot dipping, and a production line having a packaging line adjacent thereto, or a cold rolling / annealing line. , A hot dip plating line for performing only hot dip plating and a production line having a packaging line adjacent to the hot dip plating line are used (see, for example, Patent Document 1).

JP-A-56-122611

  However, as described above, with or without hot-dip plating after annealing, if two separate production lines are used, two production lines are required, and the entire steel sheet production facility is enlarged, resulting in a vast expanse. Installation space is required. In addition, the cost of manufacturing equipment increases. Furthermore, when there is only an order for one of the manufacturing processes, one of the manufacturing lines is not used at all during that period, so that the manufacturing efficiency is poor from the whole factory, and the space cannot be used effectively.

  The present invention has been made in view of the above points. It is possible to select the presence or absence of a hot dipping process after annealing of a steel strip such as a steel sheet, and to reduce the size and cost of the equipment, and to improve the production efficiency. The purpose is to provide equipment that can improve the quality of the product.

  According to the present invention for achieving the above object, an annealing line for annealing a steel strip, a packing line for packing a steel strip that has been annealed at the annealing line, and a steel that has been annealed at the annealing line. A steel strip manufacturing method comprising: a first transport line for transporting a strip to a hot dipping line; and a second transport line for transporting a steel strip that has undergone hot dipping in the hot dipping line to the packing line. Facilities are provided.

  According to the present invention, since the first transport line and the second transport line leading to the hot dipping line are provided, the steel strip after the annealing is transferred to the hot dipping line, subjected to hot dipping treatment, and then returned to the packing line. be able to. In this way, steel strips that are subjected to hot dip plating after annealing and steel strips that are not used can be processed using a common annealing line and packing line, so there is no need to provide two production lines as in the prior art. The entire equipment can be reduced in size and cost. In addition, since the annealing line and the packing line are always used, the operating rate of the manufacturing equipment can be increased and the manufacturing efficiency can be improved.

  The steel strip manufacturing facility further includes a storage portion for storing the steel strip after the annealing and before packing, and a transport passage for the steel strip is provided between the storage portion and the hot dipping line. The first transfer line and the second transfer line may be formed so as to pass through the storage portion and the transfer path.

  The first transport line transports the steel strip on the exit side of the annealing line to a relay line leading to the packing line, transports the steel strip on the relay line to the housing portion, The belt is formed so as to be transported to the entry side of the hot dipping line through the transport passage, and the second transport line transports the steel strip on the outlet side of the hot dipping line to the housing portion. The steel strip may be returned to the packing line.

  The hot dipping line has a steel strip carry-in device, a hot dipping device, and a steel strip carry-out device, the carry-in device and the carry-out device are arranged close to each other, and the first transport line is: The second conveyance line may communicate with the carry-in device, and the second transfer line may communicate with the carry-out device.

  Moreover, the said carrying-in apparatus and the said carrying-out apparatus may be arrange | positioned at the height comparable as the said annealing line and the said packaging line. The “same height” mentioned here includes, for example, floors of the same height that do not move up and down to different floors when transporting the steel strip.

  The hot dipping line has an input side looper on the carry-in device side and an output side looper on the carry-out device side, and the input side looper and the output side looper are horizontal loopers and are stacked one above the other. May be.

  The entrance side looper and the exit side looper may be stacked above the carry-in device and the carry-out device.

  The hot dipping line may have a heating device that heats the steel strip immediately before hot dipping, and the heating device may heat the steel strip by energizing it.

  The heating device and the hot dipping device on the hot dipping line may be provided at the same height as the carry-in device. The “same height” here includes, for example, those on the same floor.

  The hot dipping line may not have an annealing function.

  According to another aspect, the present invention provides a steel strip hot dipping apparatus, a steel strip carry-in device, an inlet-side looper on the carry-in device side, a hot dipping device, a steel strip carry-out device, and the carry-out device. The loading device and the unloading device are disposed close to each other, and the loading looper and the unloading looper are horizontal loopers, and may be stacked one above the other.

  The entry side looper and the exit side looper may be stacked above the carry-in device and the carry-out device.

  The hot dipping equipment may include a heating device that heats the steel strip immediately before hot dipping, and the heating device may heat the steel strip by energizing it.

  The heating device and the hot dipping device may be provided at the same height as the carry-in device.

  Further, the hot dip plating equipment may not have a steel strip annealing function.

  According to the present invention, it is possible to reduce the size and cost of a steel strip manufacturing facility and improve manufacturing efficiency.

  Hereinafter, preferred embodiments of the present invention will be described. Drawing 1 is a mimetic diagram showing composition of steel strip manufacturing equipment 1 concerning this embodiment.

  The steel strip manufacturing facility 1 includes, for example, a cold-rolling / annealing building 10, a first adjusting building 11, a second adjusting building 12, a warehouse 13, and a hot dipping building 14 as a hot dipping equipment. . The cold rolling / annealing ridge 10, the first rectifying ridge 11, the second rectifying ridge 12, and the warehouse 13 are installed in a straight line in order in the X direction positive direction (right direction in FIG. 1). The hot dipping ridge 14 is installed on the Y direction positive direction (downward direction in FIG. 1) side of the second finishing ridge 12. The second finishing building 12 and the hot dipping plating building 14 are connected by a transfer passage 15.

  A cold rolling / annealing line 20 for continuously performing the cold rolling and annealing of the steel strip H is formed in the cold rolling / annealing building 10. The cold rolling / annealing line 20 is formed so that the steel strip H is transferred from the X direction negative direction side (left direction side in FIG. 1) toward the first finishing building 11 side. The exit side of the cold rolling / annealing line 20 is installed, for example, in the first finishing building 11.

  For example, a relay line A for transferring the coiled steel strip H is formed from the first adjusting building 11 to the second adjusting building 12. The relay line A is constituted by, for example, a roller conveyor. The entrance side of the relay line A is arranged in parallel with the exit side of the cold rolling / annealing line 20 in the first finishing building 11. The relay line A can transfer the steel strip H on the exit side of the annealing line 20 to the inside of the second finishing building 12 with the X direction positive direction side directed.

  For example, a packing line 21 for conveying and packing the steel strip H from the second finishing building 12 to the warehouse 13 is formed. The entry side of the packing line 21 is installed in the second finishing building 12 and connected to the exit side of the relay line A. The packing line 21 is formed by, for example, a roller conveyor, can transfer the coiled steel strip H toward the positive side in the X direction, and can be transported by a packing machine (not shown) on the packing line 21 in the warehouse 13. Can be packed.

  A hot dipping line 22 described later is formed in the hot dipping ridge 14. The hot dipping line 22 is formed, for example, such that the longitudinal direction is in the X direction. That is, the hot dipping line 22 is formed in parallel with the cold rolling / annealing line 20 and the packing line 21.

  For example, the first finishing building 11 is provided with a crane 30 that is a transfer device that can move in the Y direction above the exit side of the cold rolling / annealing line 20 and the entrance side of the relay line A. With this crane 30, the coil of the steel strip H that has been cold-rolled and annealed in the cold-rolling / annealing line 20 can be conveyed to the entrance side of the relay line A.

  The second finishing building 12 is provided with an accommodation portion 31 that can primarily accommodate a large number of coiled steel strips H. The accommodating part 31 is arrange | positioned between the packing line 21 and the relay line A, and the conveyance path 15, for example. In the second finishing building 12, for example, a crane 32 that is a transport device that can move in the Y direction above the packing line 21, the relay line A, and the accommodating portion 31 is provided. With this crane 32, the steel strip H on the relay line A or the packing line 21 can be conveyed and accommodated in the accommodating portion 31. Further, the steel strip H of the accommodating portion 31 can be transported onto the packing line 21 by the crane 32. In addition, the transfer part which transfers the steel strip H between the relay line A and the crane 32, and between the packing line 21 and the crane 32 is provided in the connection part of the packing line 21 and the relay line A. It may be.

  For example, the transport path 15 is provided with a crane 33, which is a transport device that can move in the Y direction from above the accommodating portion 31 to within the transport path 15. In addition, a plurality of carriages 34 that are conveyance devices that convey the coiled steel strip H are provided in the conveyance passage 15. The steel strip H in the accommodating portion 31 of the second finishing building 12 is transported into the transport passage 15 by the crane 33, and the steel strip H in the transport passage 15 is input to the hot dipping line 22 of the hot dipping plating building 14 by the carriage 34. Can be conveyed. In addition, the steel strip H on the outlet side of the hot dipping line 22 can be transported into the transport passage 15 by the carriage 34, and the steel strip H can be transported to the accommodating portion 31 by the crane 33.

  In the present embodiment, for example, the first transport line for transporting the steel strip H from the outlet side of the cold rolling / annealing line 20 to the hot dipping line 22 by the crane 30, the relay line A, the cranes 32, 33, and the carriage 34. R1 is formed. Further, a second transport line R <b> 2 for transporting the steel strip H from the hot dipping line 22 to the packing line 21 is formed by the carriage 34 and the cranes 32 and 33.

  For example, a finishing line 36 that adjusts the length of the steel strip H in the width direction is formed from the second finishing tower 12 to the first finishing tower 11. The finishing line 36 is provided, for example, in the moving range of the crane 32 on the entry side, and is provided in the moving range of the crane 30 on the exit side. Therefore, for example, the steel strip H that has been subjected to the hot dipping process can be transported to the finishing line 36 by the crane 32, and the steel strip H adjusted by the finishing line 36 can be returned to the entrance side of the relay line A by the crane 30. . Note that the finishing line 36 may further have a function of removing a defective portion of the steel strip H and performing trimming.

  Next, the hot dipping line 22 will be described in detail. FIG. 2 is a schematic diagram showing an outline of the configuration of the hot dipping line 22.

  A rewinding machine 40 as a carry-in device of the hot dipping line 22 and a winder 41 as a carry-out device are provided close to each other at the same height. The unwinding machine 40 and the winding machine 41 are provided, for example, on the same level as the cold rolling / annealing line 20 and the packing line 21 described above.

  On the line from the unwinder 40 to the winder 41, a pretreatment for cleaning the steel strip H such as removing the inlet side equipment 42 such as a shear or a welding machine, the inlet side looper 43, and the rolling liquid is performed. An equipment 44, a pre-plating equipment 45 for plating nickel, a heating device 46 for heating the steel strip H immediately before hot dipping, a hot dipping device 47, and an alloying furnace equipment 48 for alloying the steel strip H , A skin pass mill 49 for adjusting the thickness of the steel strip H, a post-processing facility 50 for performing the surface treatment of the steel strip H, an exit side looper 51, and an exit side facility 52 such as a trimmer, Euler and shear from the upstream side. It is provided in order toward the downstream side. The hot dipping line 22 is formed in a substantially ring shape in the vertical plane.

  For example, the entry-side looper 43 is a horizontal looper that expands and contracts in the horizontal direction, and is disposed above the rewinding machine 40 and the winding machine 41. The exit side looper 51 is also a horizontal looper and is disposed above the entry side looper 43. In this way, the entrance side looper 43 and the exit side looper 51 are stacked and disposed above the rewinding machine 40 and the winding machine 41. In the present embodiment, the floor boundary is between the entry side looper 43 and the exit side looper 51, the entry side looper 43 side is the lower floor, and the exit side looper 51 side is the upper floor.

  The pretreatment equipment 44, the pre-plating equipment 45, the heating device 46, and the hot dipping device 47 on the exit side of the entrance side looper 43 are provided at the same level on the same lower floor as the rewinding machine 40. Further, the rewinding machine 40, the processing equipment 44, the pre-plating equipment 45, the heating device 46, and the hot dipping device 47 are arranged in a straight line when viewed from the plane. The hot dip plating apparatus 47 is disposed at a position farthest from the entry side looper 43 in the horizontal direction, and the unwinding machine 40 to the hot dip plating apparatus 47 is a forward path of the substantially annular hot dip plating line 22.

  The alloying furnace equipment 48 is disposed above the hot dipping apparatus 47. The skin pass mill 49 and the post-processing equipment 50 on the exit side of the alloying furnace equipment 48 are juxtaposed above the forward path to the hot dipping apparatus 47, for example, and communicate with the exit-side looper 51 having the same height. The exit side of the exit side looper 51 is provided on the opposite side of the post-processing facility 50 and communicates with the lower exit side facility 52. The delivery side equipment 52 is installed at the same height on the same upper floor as the winder 41.

  Next, the configuration of the heating device 46 that performs heating immediately before hot dipping will be described. FIG. 3 is an explanatory diagram showing an outline of the configuration of the heating device 46 and the hot dipping device 47.

  The heating device 46 employs a heating method of a transformer effect type electric heating method. The heating device 46 includes, for example, a conductive roll 70, a seal roll 71, and a turn roll 72 in order from the upstream side along the steel strip H. The exit side of the turn roll 72 communicates with the turn roll 74 in the plating tank 73 of the hot dipping apparatus 47.

  The periphery of the steel strip H from the seal roll 71 to the plating tank 73 is surrounded by an enclosure 75, for example. Thereby, the steel strip H can be maintained in a predetermined inert atmosphere from heating to plating.

  Between the seal roll 71 and the turn roll 72, for example, a ring-shaped iron core 76 surrounding the steel strip H and the surrounding body 75 is provided. A primary coil 77 is wound around the iron core 76, and an AC power supply 78 is connected to the primary coil 77.

  The tip of the enclosure 75 is in contact with the plating metal in the plating tank 73. A bus bar 79 that is electrically connected to the conductive roll 70 is connected to the tip of the enclosure 75. Thereby, the secondary coil 80 around which the iron core 76 is wound is formed by the conductive roll 70, the steel strip H, the plating metal in the plating tank 73, the tip of the enclosure 75 and the buspar 79. By applying a voltage to the primary coil 77 and causing a current to flow from the AC power source 78, power can be induced on the secondary coil 80 side and a high current can be passed through the steel strip H. With this current, the steel strip H can generate heat and the steel strip H can be heated.

  Next, the manufacturing process of the steel strip H in the steel strip H manufacturing equipment 1 configured as described above will be described.

  For the steel strip H that does not require hot dip coating, first, the steel strip H is cold-rolled and annealed in a cold-rolling / annealing line 20, for example, as shown in FIG. Thereafter, the coiled steel strip H on the exit side of the cold rolling / annealing line 20 is conveyed to the entrance side of the relay line A by the crane 30. The steel strip H placed on the relay line A is transferred from the first finishing building 11 to the second finishing building 12. Thereafter, the steel plate H is transferred to the packing line 21 in the second finishing building 12, and then transferred to the warehouse 13 and packed. Thus, the steel strip H is ready to be taken out from the factory.

  If necessary, the steel strip H that has been annealed may be transported from the relay line A to the finishing line 36 by the crane 32, and the width of the steel strip H may be adjusted in the finishing line 36. In this case, the adjusted steel strip H is returned to the relay line A by the crane 30 in the first rectifying building 11, and then transferred to the warehouse 13 side by the packing line 21 and packed.

  For the steel strip H that requires hot dip coating, first, the coiled steel strip H that has been cold-rolled and annealed is placed on the relay line A by the crane 30. Subsequently, the steel strip H is conveyed to the second finishing building 12 by the relay line A. The steel strip H transported to the second finishing building 12 is transported and stored in the storage unit 31 from the exit side of the relay line A by the crane 32, for example. Thereafter, the steel strip H is transported into the transport passage 15 by the crane 33 and transported into the hot dipping platter 14 by the carriage 34. Thus, the steel strip H is installed in the rewinding machine 40 of the hot dipping line 22 shown in FIG.

  The steel strip H installed in the rewinding machine 40 passes through the entry side equipment 42 and is sent to the upper entry side looper 43, and then sent to the pretreatment equipment 44 and the pre-plating equipment 45. Thereafter, the steel strip H is rapidly heated at a low temperature by energization in the heating device 46, and continuously plated with a plating metal in the hot dipping device 47. The plated steel strip H passes through the alloying furnace equipment 48, the skin pass mill 49, and the post-treatment equipment 50, and is sent to the exit side looper 51. Thereafter, the steel strip H passes through the delivery facility 52 and is taken up by the winder 41.

  For example, as shown in FIG. 1, the coiled steel strip H wound up by the winder 41 is transported into the transport passage 15 by a carriage 34 and stored in the storage portion 31 of the second finishing building 12 by a crane 33. Is done. Thereafter, the steel strip H is transported onto the packing line 21 by the crane 32. The steel strip H returned to the packing line 21 is conveyed to the warehouse 13 side by the packing line 21 and packed.

  If necessary, the steel strip H of the housing portion 31 may be transported to the finishing line 36 by the crane 32 and the width of the steel strip H may be adjusted in the finishing line 36. In this case, the adjusted steel strip H is returned to the relay line A by the crane 30 in the first rectifying building 11, and then transferred to the warehouse 13 side by the packing line 21 and packed.

  According to the above embodiment, the first transport line R1 for transporting the steel strip H from the outlet side of the cold rolling / annealing line 20 to the hot dipping line 22 and the steel strip H after the hot dipping are packed into the packing line 21. Since the second transport line R2 for transporting to the entrance side of the steel sheet is formed, the steel strip H that is subjected to the hot dipping treatment after the cold rolling and annealing and the steel strip H that is not subjected to the same cold rolling / annealing line 22 and the packing line 21 are connected. Can be used. As a result, it is possible to reduce the size and cost of the steel strip production facility 1 as compared to the conventional case where a separate production line is provided. In addition, the cold rolling / annealing line 20 and the packaging line 21 are always used regardless of the presence or absence of the hot dipping process, so that the operation rate of the production line is increased and the production efficiency is improved.

  Since the first transport line R1 and the second transport line R2 are formed so as to pass through the same transport path 15, it is not necessary to provide the transport path 15 for each transport line, and the equipment can be downsized accordingly. . In addition, since the unwinding machine 40 and the winder 41 in the hot dipping line 22 are disposed close to each other, the width of the transport passage 15 that communicates with the unwinder 40 and the winder 41 can be reduced.

  Since the steel strip H is transported from the relay line A to the hot dipping line 22, the steel strip H can be transported to the hot dipping line 22 using the existing line, and the equipment cost can be reduced correspondingly.

  Since the accommodating portion 32 is arranged in the middle of conveyance to the hot dipping line 22, the coiled steel strip H can be temporarily accumulated and the supply timing to the hot dipping line 22 can be adjusted. In this accommodating part 32, the difference of the required time of the cold rolling / annealing line 20 and the hot dipping line 22 can be absorbed.

  Since the rewinding machine 40 and the winding machine 41 are installed on the same level as the cold rolling / annealing line 20 and the packing line 21, the steel strip H from the cold rolling / annealing line 20 to the hot dipping line 22 The conveyance and the conveyance of the steel strip H from the hot dipping line 22 to the packing line 21 can be performed smoothly with little difference in height.

  In the hot dipping line 22, since two loopers 43 and 51 that take place in the horizontal direction are stacked, the hot dipping line 22 can be downsized and its installation space can be reduced. In addition, since the input side looper 43 and the output side looper 51 are stacked immediately above the rewinding machine 40 and the winding machine 41, for example, an administrator residing in the rewinding machine 40 and the winding machine 41 can enter the input side. Problems with the looper 43 and the exit looper 51 can also be found. In particular, since the entrance side looper 43 and the exit side looper 51 have a large number of rolls and are liable to malfunction, the effect is great.

  Since the heating device 46 of the hot dipping line 22 is heated by energizing the steel strip H, the length of the heating device 46 is much shorter than that using a furnace. Thereby, the hot dipping line 22 is shortened and reduced in size, and the installation space of the hot dipping line 22 can be reduced.

  In addition, since the upstream side of the annular hot dipping line 22 to the hot dipping machine 47 are provided on the same floor as the rewinding machine 40, an optimum apparatus arrangement for space saving of the hot dipping line 22 is provided. realizable. Since the hot dipping line 22 does not have an annealing function, the line can be shortened accordingly.

  In the above embodiment, the adjusting line 36 is formed so as to flow from the second adjusting building 12 to the first adjusting building 11, but as shown in FIG. An inter-building carriage 100 that conveys the steel strip H to and from the finishing building 12 is arranged, and a finishing line 36 is formed so as to flow from the first finishing building 11 side to the second finishing building 12 side. Also good. In such a case, the steel strip H that has been subjected to the hot dipping process is placed, for example, on the inter-building carriage 100 from the accommodating portion 31 and conveyed to the first finishing building 11, and the width of the steel strip H is adjusted by the finishing line 36. Done. Thereafter, the steel strip H on the exit side of the finishing line 36 is returned to the entry side of the packing line 21 by the crane 32. Further, the steel strip H that does not require the hot dipping process is conveyed to the finishing line 36 by the crane 30 after annealing, and the width of the steel strip H is adjusted in the finishing line 36. Then, the steel strip H is returned to the packing line 21 by the crane 32.

  The preferred embodiment of the present invention has been described above with reference to the accompanying drawings, but the present invention is not limited to such an example. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the spirit described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs. For example, the first transport line R1 and the second transport line R2 described in the above embodiment are realized by using the cranes 30, 32, 33 and the carriages 34. However, the number of cranes and the number of carriages are described. And the arrangement can be selected arbitrarily. Moreover, you may use conveyance apparatuses other than a crane and a trolley | bogie. In the above-described embodiment, the cold rolling and annealing line 20 is performed in which cold rolling and annealing are performed continuously, but cold rolling and annealing may be performed in separate lines. The rolling before annealing is not limited to cold rolling but may be hot rolling. The heating device 46 prior to hot dipping in the hot dipping line 22 uses a transformer effect type electric heating method, but uses other electric heating methods such as a direct current heating method and an induction heating method. There may be.

  The present invention is useful for reducing the size and cost of steel strip manufacturing equipment and improving manufacturing efficiency.

It is a schematic diagram which shows the outline of a structure of the manufacturing equipment of a steel strip. It is a schematic diagram which shows the outline of a structure of a hot dipping line. It is explanatory drawing which shows the outline of a structure of a heating apparatus and a hot dipping apparatus. It is a schematic diagram which shows the outline of a structure of the manufacturing equipment of the steel strip which has a bogie truck.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steel strip manufacturing equipment 12 Second finishing building 15 Transport passage 20 Cold rolling / annealing line 21 Packing line 22 Hot dipping line H Steel strip

Claims (15)

An annealing line for annealing the steel strip;
A packing line for packing the steel strip that has been annealed in the annealing line;
A first conveying line for conveying a steel strip that has been annealed in the annealing line to a hot dipping line;
A steel strip manufacturing facility comprising a second transport line for transporting a steel strip that has been hot-plated in the hot-dip plating line to the packing line. A storage section for storing the steel strip before the annealing is finished and packed;
A steel strip transport passage is provided between the housing portion and the hot dipping line,
2. The steel strip manufacturing facility according to claim 1, wherein the first transport line and the second transport line are formed so as to pass through the storage portion and the transport passage. 3. The first transport line transports the steel strip on the exit side of the annealing line to a relay line leading to the packing line, transports the steel strip on the relay line to the housing portion, A belt is formed to be conveyed to the entrance side of the hot dipping line through the conveyance path;
The second transport line is formed so as to transport a steel strip on the outlet side of the hot dipping line to the housing portion and transport the steel strip of the housing portion onto the packing line. The steel strip manufacturing facility according to claim 2. The hot dipping line has a steel strip carrying-in device, a hot dipping device, and a steel strip carrying-out device,
The carry-in device and the carry-out device are arranged close to each other,
The first transport line leads to the carry-in device;
The steel strip manufacturing facility according to any one of claims 1 to 3, wherein the second transport line communicates with the carry-out device. 5. The steel strip manufacturing facility according to claim 4, wherein the carry-in device and the carry-out device are arranged at the same height as the annealing line and the packing line. The hot dipping line has an inlet looper on the carry-in device side and an exit looper on the carry-out device side,
The steel strip manufacturing equipment according to any one of claims 3 to 5, wherein the entrance side looper and the exit side looper are horizontal loopers and are stacked one above the other. The steel strip manufacturing facility according to claim 6, wherein the entry side looper and the exit side looper are stacked above the carry-in device and the carry-out device. The hot dipping line has a heating device for heating the steel strip immediately before hot dipping,
The steel strip manufacturing facility according to any one of claims 3 to 7, wherein the heating device heats the steel strip by energizing it. 9. The steel strip manufacturing facility according to claim 8, wherein the heating device and the hot dipping device on the hot dipping line are provided at a height similar to that of the carry-in device. The steel strip manufacturing facility according to any one of claims 1 to 9, wherein the hot dipping line does not have an annealing function. A steel strip hot dipping facility,
A steel strip carry-in device, an entry-side looper on the carry-in device side, a hot dipping device, a steel strip carry-out device, and an exit-side looper on the carry-out device side,
The carry-in device and the carry-out device are arranged close to each other;
The hot-dip plating equipment according to claim 1, wherein the entrance-side looper and the exit-side looper are horizontal loopers and are stacked one above the other. 12. The hot dipping apparatus according to claim 11, wherein the entry side looper and the exit side looper are stacked above the carry-in device and the carry-out device. A heating device that heats the steel strip immediately before hot dipping,
13. The hot dipping apparatus according to claim 11, wherein the heating device heats the steel strip by energizing it. 14. The hot dipping apparatus according to claim 13, wherein the heating device and the hot dipping device are provided at a height similar to that of the carry-in device. The hot dip plating equipment according to any one of claims 11 to 14, wherein the steel strip is not provided with an annealing function.

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