JP2808409B2 - Inner core for continuous coil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner core for a coil for preventing torsion when removing a strip from a coil. The present invention relates to a continuous coil inner core for preventing twisting when a metal strip is taken out of a continuous coil capable of taking out a continuous strip having a length.

[0002]

2. Description of the Related Art In general, a metal strip is processed into a metal ingot having desired properties and thickness by repeatedly performing rolling and heat treatment. Further, some of them may be subjected to various surface treatments, but are finally cut to a desired width by a slitter. Then, a coil of a metal strip wound with the width direction of the strip parallel to the center axis of the coil and with the slit edges aligned is produced. The wound metal strip is then processed as a metal material by processing equipment such as surface treatment such as plating and painting and plastic working by press. In these subsequent processing steps, it is indispensable to continuously unwind and remove the metal strip.
Therefore, removal of this strip is an important step that affects productivity and quality in the processing step of the metal strip.

Conventionally, as an uncoiler method of a metal strip, a vertical decoiler method, a horizontal product decoiler method, a traverse method, and a continuous coil method have been practiced as typical methods. The above-mentioned vertical uncoiler system is a method in which coils are set vertically on an uncoiler like a reel of a projector, and coils are taken out by rotating the coils. In this method, after using one coil, the next coil must be set one by one, so that the operator normally changes the posture of the coils stacked side by side on a pallet (stand) one by one to a vertical type. It takes time to set them, and the operating rate of processing equipment such as press machines is extremely low. Also, the work of setting and setting a heavy coil from a horizontal position was dangerous. It is necessary to stop the work of the processing equipment for each coil and to set the starting end of the coil to the processing equipment by stopping the operation thereof, thereby lowering the operation rate of the processing equipment and further reducing the length of one coil. It could not be processed by the processing equipment, and the product length was limited.

In the horizontal stacking type uncoiler system, the coils stacked sideways on a pallet (stand) are placed together with the pallet on the turntable of the uncoiler, and the coil strips are rotated (turned in or out) while rotating the turntable. This is a method of taking out one coil at a time from top to bottom. Unlike the above-mentioned vertical type, this method greatly improves workability in that coils stacked horizontally on a pallet can be installed on the turntable of the uncoiler for each pallet as it is, However, the disadvantages of the vertical system still remain. That is, the processing equipment is stopped every time the unwinding of one coil is completed, and the starting end of the next coil is set in the apparatus, or when the unwinding of one coil approaches the end, the end is moved to the next lower part. It was necessary to weld to the beginning of the coil.

In the traverse method, a long strip is formed by welding slit strips, and the long strip is repeatedly wound on a reel, for example, repeatedly from the left end to the right end and from the right end to the left end, and continuously wound. 1 while rotating the reel
This is a method of unwinding reels. This method is advantageous in that it can handle continuous-length strips, but on the other hand, the work of winding the strips on the reel is troublesome and time-consuming. In addition, if the conditions for winding the strip around the reel are bad, the strip may be misaligned during transportation, the surface may be damaged, the strip may not be removed, or the edge of the strip wound on the strip may not be removed. There is a drawback that they cannot be used in applications where the required characteristics of the surface are strict because they overlap and cause minute scratches.

Further, the continuous coil system is such that a plurality of coils 1, 2, 3,... Having different winding directions for each coil are arranged side by side on a pallet 7 as shown in FIG. The inner end or outer end of the coil is sequentially joined and placed in a stacked state on a turntable 8 of an uncoiler. While the turntable 8 is rotated in one direction, the upper coil is joined to the lower coil. It is characterized in that the strip is continuously taken out via the inner end or the outer end of the adjacent coil sequentially. The method of removing the coil strip has the effect that the continuous coil strip can be smoothly removed without any damage or distortion without any step at the joint, and there is no need to interrupt the machining operation at all. In the continuous coil, the strip is taken out from the inside of the coil and 1 from the outside.
It is difficult to suppress the occurrence of abnormalities such as winding or loosening due to the spring property of the metal strip because it changes continuously for each coil, and it is difficult to twist and buckle with thin and soft materials. It was very difficult to remove. As described above, each of the methods has many disadvantages in terms of workability, productivity, metal strip quality, strip yield (effective utilization), and the like. It cannot be said that the required performance is satisfied.

[0007]

In the above conventional method,
Regardless of whether the axis of the coil is vertical or horizontal, when taking out the coil, the force or displacement applied to the strip is detected by the dancer roll, and the coil is rotated and sent out. However, in this conventional method, ON-OF of coil rotation by a signal from a sensor is performed.
Because of the F control, the unwinding of the coil suddenly causes a large change in the unwinding speed. For this reason, for example, in the horizontal uncoiler method, the strip is unwound from the outside of the horizontal coil, so it is loosened by the spring property of the metal strip, or conversely, when it is taken out from the inside, the strip is made of a thin and soft material. Abnormalities such as buckling may occur.

[0008] In addition, since the size and mechanical properties of the metal strip are various, it is necessary to adjust the decoiler according to the size and mechanical properties. In particular, if the rotational speed of the coil during operation is constant, the take-out radius changes as the strip is taken out, so that the speed at which the strip is unwound at the tip and the end of the coil changes. Thereby, abnormalities such as loose winding and buckling of the strip are more likely to occur. Therefore, development of a method of taking out a coil strip that does not cause abnormalities such as loose winding and buckling of the strip has recently been desired. In particular, when taking out a coil strip from a continuous coil, the metal strip is pulled by the feed roller, so when pulling out from the coil outer circumference, and also when pulling out from the coil inner circumference, the properties of the coil strip material, The strip is released from the inner circumference and pulled out faster than the rotation speed of the coil due to the influence of elasticity, fluctuation of the drawing tension, change of the friction situation of the coil lower face, etc., and the strip itself twists and the strip often buckles. There was a problem.

The present invention has been made in view of the above circumstances, and a feed roll is installed between a coil and a processing facility so that a feed speed of a strip is set to a constant speed on the processing facility side. An inner core for a coil for preventing torsion on the unwinding side is provided on a turntable located on the inner periphery of the coil to provide an inner core for a continuous coil that does not cause abnormalities such as loose winding and buckling of the strip. It is intended to be.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a coil having a plurality of metal strips having different winding directions for each coil placed horizontally on a turntable. The inner or outer ends of the
And in the inner core for continuous coil for preventing torsion when taking out the metal strip from the continuous coil in the form of being sequentially stacked with the rotation axis of the coil matched, the metal strip pulled out from the continuous coil by a feed roll is The coil inner core is wound around the inner core of the coil for one or less turns to prevent the strip from unusually unwinding from the coil, and the inner core is used as a guide to smoothly feed the metal strip and prevent the strip from being twisted. An inner core for a continuous coil characterized by being erected on a turntable on the inner periphery, and the inner core for the continuous coil is formed from a plurality of rotating rods erected such that each outer peripheral position is cylindrical. It is characterized in that the inner core for the continuous coil is formed from a plurality of arc-shaped bodies erected so that each outer peripheral surface becomes cylindrical. Further, the inner core for the continuous coil is formed of a cross-shaped body having a cylindrical outer peripheral surface, and the inner core for the continuous coil is formed into a Y-shaped body having a cylindrical outer peripheral surface. It is characterized by being formed from.

[0011]

Next, the operation of the present invention will be described. In the case of a method of taking out a coil strip from a metal strip coil placed horizontally on a turntable, or in a different winding direction for each horizontally placed coil. In the case of taking out a coil strip from a continuous coil in which a plurality of metal strip coils are joined one on the other with the inner end or the outer side of the adjacent coil and stacked in order with the rotation axis of the coil aligned, A feed roller is placed between the equipment and a contact-type dancer roll is placed between the feed roller and the coil, and the contact-type dancer roll is displaced by a change in tension applied to the strip. θ detects the tension fluctuation applied to the strip, and controls the rotation speed of the feed roll and the turntable so that the tension of the strip in the same section is within a certain range, thereby adjusting the strip P. And it sends it to the factory equipment.

When the coil strip is taken out from the continuous coil as described above, the metal strip is pulled by the feed roller, so that the strip is pulled out from the outer periphery of the coil and the inner strip is pulled out from the inner circumference of the coil. And the metal strip is smoothly fed out using the inner core as a guide. Therefore, the coil can be uniformly taken out by the feed roll by the inner core having an outer periphery having a cylindrical shape, so that abnormalities such as buckling due to loose winding and twisting of the coil do not occur, and the coil can be smoothly taken out. Is possible.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for taking out a coil strip using an inner core for a continuous coil according to the present invention will be described below with reference to the drawings. FIG. 1 shows the outer periphery B of the top coil 10 in the continuous coil using the inner core for the continuous coil according to the present embodiment.
FIG. 2 shows a method of taking out a strip from the inner circumference A side of the uppermost coil 10. In FIG. 1, the uppermost coil 10 is stacked on the turntable 8, and the strip P is taken out from the outer periphery B side of the coil 10 and sent to a press machine or the like in the direction of arrow X.
It is necessary that the strip P is supplied at a constant speed for processing by a press machine or the like, and when a coil strip is taken out from a continuous coil, a feed roll 11 is arranged between the coil 10 and the processing equipment. A contact-type dancer roll 12 is arranged between the feed roll 11 and the coil 10, and the contact-type dancer roll 12 is displaced by a change in tension applied to the strip P. Upon detection, the rotation speed of the feed roll 11 and the turntable is controlled so that the tension of the strip in the same section is within a certain range, and the strip P is sent to the processing equipment.

As described above, the uppermost coil 1 of the continuous coil
In order to take out the coil strip P from 0, since the metal strip P is pulled by the feed roller 11, when the coil strip P is pulled out from the coil outer circumference B shown in FIG. 1, it is also pulled out from the coil inner circumference A shown in FIG. In this case, the metal strip is released from the coil and pulled out faster than the rotation speed of the coil due to the characteristics of the coil material, elasticity, fluctuations in the pulling tension, and changes in the friction situation on the lower surface of the coil. Twisting and buckling of the strip often occur.

At this time, if the cylindrical inner core 13 for the continuous coil shown in these drawings is set up inside the coil inner circumference A on the turntable on which the continuous coil is mounted,
The metal strip P drawn out as shown in FIG.
And the metal strip P is sent out smoothly using the inner core 13 as a guide, so that the metal strip P is pulled out faster than the rotation speed of the coil, and the metal strip P is unnecessarily pulled out. It does not twist itself. At this time, the gap between the inner diameter of the coil and the outer diameter of the inner core 13 needs to be equal to or longer than the width of the strip to be taken out. Moreover, the height of the inner core 13 is 10 to 40 c higher than that of the uppermost coil.
If it is higher by about m, winding of the metal strip is further improved.

FIGS. 4 and 5 show other shapes of the inner core for the continuous coil, respectively. The inner core 14 for the continuous coil shown in FIG. A plurality of rotating rods 15 are formed upright so that the outer peripheral position is cylindrical. The inner core 16 for a continuous coil shown in FIG. Is formed from a plurality of arc-shaped bodies 17 erected so that the outer peripheral surface of the body is cylindrical.

FIGS. 6 and 7 show other shapes of the inner core for the continuous coil, respectively.
The inner core 19 for a continuous coil shown in FIG. 7 is formed from a cross-shaped body 18 having an outer peripheral surface having a cylindrical shape, and the inner core for a continuous coil 21 shown in FIG. It is formed from a Y-shaped body 20 having a shape. The shape, material, and the like of the inner core shown in the description of the specific examples are not particularly limited as long as they do not depart from the gist of the present invention.

In the case where various continuous coil inner cores are used as described above, the relationship between the continuous coil inner core and the spacer interposed between the plurality of stacked coils is as follows. , 17, 19, and 21 further extend the spacer about 10 to 30 mm inward than the gap between the outer diameter and the inner diameter and insert the spacer into the inner core, so that when the strip P is taken out, the strip P falls into or gets caught in the gap. Can be prevented, and the removal operation can be performed more smoothly.

[0019]

As described above, according to the present invention, since the inner core for the coil is erected on the turntable on the inner periphery of the coil, when the coil is taken out from the continuous coil, the metal is pulled by the feed roller. When the wire is pulled out from the outer circumference of the coil, or when the wire is pulled out from the inner circumference of the coil, the strip is wound around the inner core by one turn or less, and the metal strip is fed smoothly using the inner core as a guide, Thereby, the coil strip can be taken out uniformly, and no abnormalities such as buckling due to loose winding and twisting of the strip occur, and the coil strip can be taken out smoothly. Therefore, the metal strip can be taken out smoothly, and there is no limit to the length of the product, so there is no interruption of the working process, and therefore, the operation rate of the working equipment is improved, and the work in the working equipment can be performed safely.

Also, in the case of an inner core having a cylindrical outer periphery, a strip is also formed around the inner core when the outer coil is pulled out from the coil outer periphery from the continuous coil, or when the inner core is pulled out from the inner periphery of the coil. Wound below, the metal strip is smoothly fed out using the inner core as a guide, the coil roll can be taken out uniformly by the feed roll, and abnormalities such as buckling due to loosening or twisting of the strip do not occur. In addition, since the coil strip can be smoothly removed, the operability of the work for removing the coil from the coil can be remarkably improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of the present embodiment.

FIG. 2 is a perspective view of the present embodiment.

FIG. 3 is an explanatory diagram of a state in which a metal strip is taken out from an inner core according to the present embodiment.

FIG. 4 is a perspective view of an inner core of the present embodiment.

FIG. 5 is a perspective view of an inner core of another embodiment.

FIG. 6 is a perspective view of an inner core of another embodiment.

FIG. 7 is a perspective view of an inner core of another embodiment.

FIG. 8 is an explanatory diagram of a process of continuously taking out strips in the present embodiment.

[Explanation of symbols]

 1, 2, 10 Coil 7 Pallet 8 Turntable 11 Feed roll 9 12 Contact dancer roll 13, 14, 16, 19, 21 Inner core 15 Rotating rod 17 Arc-shaped body 18 Cross-shaped body 20 Y-shaped body

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Shinji Hasumi 3 Kurami-machi, Samukawa-cho, Koza-gun, Kanagawa Prefecture Nippon Mining & Metals Co., Ltd. Kurami Plant (56) References JP-A-53-58460 (JP, A) −18432 (JP, U) JP 55-16734 (JP, B2) (58) Fields investigated (Int. Cl. ⁶ , DB name) B21C 45/00-49/00 B65H 19/00-19/30 , 23 / 08,49 / 28

Claims (5)

(57) [Claims] 1. A method of joining a plurality of metal strip coils having different winding directions for each coil placed horizontally on a turntable by joining inner ends or outer ends of adjacent coils,
And in the continuous coil inner core for preventing twisting when taking out metal strips from a continuous coil in the form of being sequentially stacked with the rotation axis of the coil matched, the continuous coil
The metal strip drawn by the feed roll from the coil
Wraps around the inner core less than one lap and abnormally strips from the coil
The inner core as a guide and the metal strip
An inner core for a continuous coil, wherein an inner core for a coil capable of being smoothly fed and preventing twisting of a strip is erected on a turntable around the inner periphery of the coil. 2. The inner core for a continuous coil according to claim 1, wherein the inner core for the continuous coil is formed of a plurality of rotating rods which are erected so that each outer peripheral position is cylindrical. 3. The continuous coil inner core according to claim 1, wherein the inner core for the continuous coil is formed of a plurality of arc-shaped bodies erected so that each outer peripheral surface is cylindrical. 4. The inner core for a continuous coil according to claim 1, wherein the inner core for the continuous coil is formed of a cross-shaped body having a cylindrical outer peripheral surface. 5. The inner core for a continuous coil according to claim 1, wherein the inner core for the continuous coil is formed of a Y-shaped body having a cylindrical outer peripheral surface.