JPH10180353A - Coil car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the shape of a steel strip from becoming a telescopic shape at the time of extracting the steel strip and to obtain a coil car capable of easily extracting the steel strip having the thin coiled thickness and being easily flattened from a tension reel by arranging a permanent magnet or electric magnet attracting the steel strip in the skid part of the coil car. SOLUTION: When the diameter of the reel is reduced, the steel strip 5 is flattened, the upper part 7 of the inner periphery of the steel strip is brought into contact with the upper part 8 of the outer periphery of the reel, a frictional force is generated between them at the time of extracting the steel strip 5. However, since the steel strip 5 is attracted to the skid part 2 and respective coiled steel strips having the gap are together attracted due to the magnetic force of the permanent magnet or electric magnet, the frictional force between the coil car 1 and the steel strip 5 and the frictional force between the coiled steel strip group become larger than the frictional force between the upper part 7 of the inner periphery of the steel strip and the upper part 8 of the outer periphery of the reel, whereby the shape of the steel strip 5 is prevented to become the telescopic shape following the transfer of the coil car 1 and the steel strip 5 having the thin coiled thickness is easily extracted from the tension reel 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of manufacturing a thin plate, and more particularly to the technical field of a coil car for extracting a steel strip wound on a reel from the reel.

[0002]

2. Description of the Related Art When manufacturing a product from a steel strip, if a defective portion that does not become a product occurs for some reason, the portion is scrapped down. The processing method is to cut the defective part into an end plate shape with a shear and scrap it down, or wind it on a scrap dedicated reel without cutting it into an end plate shape, wind it up on a product tension reel,
Do you want to scrap down later?

[0003]

When the portion to be scrapped down is long, cutting into an end plate with a shear and scraping down takes a long time to cut, and the productivity is reduced. In such a case, the product is wound around a product tension reel and scrap-down processing is performed later. When the product is wound on a product tension reel, the steel band wound on the tension reel is placed on a coil car, and then the diameter of the tension reel is reduced, and a gap is formed between the inner peripheral surface of the steel band and the outer peripheral surface of the reel. , Remove the steel strip from the tension reel by moving the coil car. The steel strip extracted from the tension reel is separately scrapped down.

FIG. 5 is an explanatory view when the steel strip 5 wound up with a thick winding thickness is pulled out from the tension reel 6, and FIG.
(B) shows a state in which the coil car 1 is moved to remove the steel strip 5 from the tension reel 6, and (c) shows a side view of (a). I have.

FIGS. 6A and 6B are explanatory views when the steel strip 5 wound with a small winding thickness is pulled out from the tension reel 6, and FIG. 6A shows the shape of the steel strip 5 when the steel strip 5 is pulled out.
15B, (b) is a side view of (a). Even if the diameter of the reel is reduced, the steel strip 5 is flattened even when the reel diameter is reduced. It shows the state where it is.

As shown in FIG. 5 (c), in the case of a steel strip 5 wound with a large winding thickness, the steel strip 5 is not deformed by its own weight even if the diameter of the reel is reduced. 5 (b), the steel strip 5 can be removed from the tension reel 6 in the wound state as shown in FIG. 5 (b). However, when pulling out a thin steel strip with a thickness of 0.5 mm or less with a thin winding thickness from a tension reel, as shown in FIG. Since the steel strip 5 is flattened and the upper part 7 of the inner peripheral surface of the steel strip contacts the upper part 8 of the outer peripheral surface of the reel,
A frictional force is generated between the upper portion 7 of the inner peripheral surface of the steel strip and the upper portion 8 of the outer peripheral surface of the reel. Therefore, if the steel strip 5 is pulled out as it is, as shown in FIG. 6 (a), a slip occurs between the steel strip 5 and the coil car 1, and the steel strip 5 becomes a telescopic shape 15, and the coil car 1 is moved to move the tension reel. 6 to steel strip 5
Is difficult to extract.

[0007] In order to reduce the frictional force between the upper portion of the inner peripheral surface of the steel strip and the upper portion of the outer peripheral surface of the reel, there is a method of reversing the reel to loosen the winding of the steel strip to facilitate removal.
If this method is used with an ultrathin material of 0.2 mm or less, the inner peripheral portion of the steel strip may squeeze due to warping, and conversely, the steel strip may not be able to be pulled out from the tension reel.

For this reason, when winding a defective portion on a tension reel with a thin material, in order to prevent flattening at the time of removing the steel strip, the thin portion is wound up to a thick winding thickness including a non-defective portion and a non-defective portion. taking it. Therefore, the winding of the non-defective part lowers the yield, which also leads to a reduction in productivity.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a permanent magnet or an electromagnet for attracting a steel strip to a skid portion of a coil car, and / or a stopper capable of moving up and down is provided. Provided is a coil car capable of preventing the shape of a steel strip from being telescoped even when the steel strip is flattened at the time of removing the steel strip, and easily removing the steel strip having a thin winding thickness from a tension reel. The purpose is to:

[0010]

The gist of the present invention is characterized in that a permanent magnet or an electromagnet for adsorbing a steel strip is provided on a coil car skid portion.

[0011] Further, the coil car skid is provided with a stopper which can be moved up and down.

Further, the stopper and the permanent magnet or the electromagnet are arranged in the coil car skid portion in order from the reel extracting side.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A permanent magnet or an electromagnet is disposed on a coil car skid so that the surface of the permanent magnet or the electromagnet is at the same height as the skid surface. A steel strip wound on a tension reel is placed on a skid part provided with a permanent magnet or an electromagnet, and the steel strip is attracted to the coil car skid part by a permanent magnet or an electromagnet, and a steel strip between turns is provided. Adsorb the bands. As a result, the frictional force between the coil car and the steel strip and between the steel strips between the windings is smaller than the frictional force due to the contact between the upper part of the inner peripheral surface of the steel strip and the upper part of the outer peripheral surface of the reel due to the flattening of the steel strip when the steel strip is removed. Can be increased.

Therefore, at the time of removing the steel strip, the frictional force between the coil car and the steel strip and between the steel strips between the windings is increased, so that the upper part of the outer peripheral surface of the reel and the upper part of the inner peripheral surface of the steel strip as the coil car moves. The inner peripheral portion of the steel strip is prevented from being drawn out in a telescopic shape due to the frictional force generated between them, and the steel strip having a thin winding thickness can be easily pulled out from the tension reel in the wound shape.

In the case of an electromagnet, since the magnetic force can be adjusted by adjusting the current, the frictional force between the coil car and the steel strip and between the steel strips between the windings can be adjusted. Further, since a product passing through a coil car in which a permanent magnet or an electromagnet is provided in a coil car skid portion is magnetized, a product that does not like magnetization needs to be demagnetized before shipment. Furthermore, even after being pulled out from the reel, the flattened steel strip is unstable on the coil car, so if the electromagnet is excited even when moving the coil car, the coil car can be moved in a stable state, and Of the steel strip can be prevented. In addition, since permanent magnets or electromagnets are provided in the coil car skid, iron powder and small iron pieces in the factory are attracted to the magnet surface, which causes flaws on the outer peripheral surface of the steel strip. Cleaning is required.

The coil car skid is provided with a vertically movable stopper whose height can be adjusted according to the winding thickness of the steel strip. Lifting and lowering of the stopper is performed by a coil spring or a hydraulic cylinder. If a coil spring is used, the stopper should be set up from the beginning so that it is higher than the winding thickness of the steel strip, and when the steel strip wound on a tension reel is placed on the coil car skid, the stopper will move to the reel. And descends to the level of the lower surface of the outer periphery of the reel. Since the upper surface of the stopper is always in contact with the lower part of the outer peripheral surface of the reel, if the reel surface is covered with a sleeve such as rubber, adjust the lifting force of the stopper so that the stopper does not damage the coating when removing the steel strip It is necessary to keep.

When a fluid pressure cylinder is used,
At first, lower the stopper to the skid surface, place the steel strip wound on the tension reel on the coil car skid part, and then raise the stopper to the height of the winding thickness of the steel strip with the hydraulic cylinder. . When removing the steel strip, the reel diameter is reduced, so there is a gap between the lower part of the inner peripheral surface of the steel strip and the lower part of the outer peripheral surface of the reel. And the coating on the reel surface is not damaged.

When the steel strip is removed, since the stopper is raised to the winding thickness of the steel strip, the frictional force generated between the upper portion of the outer peripheral surface of the reel and the upper portion of the inner peripheral surface of the steel strip due to the movement of the coil car causes the steel strip to be removed. Prevents the inner peripheral part from being drawn out in a telescope shape, prevents the steel strip from becoming telescope-shaped, and easily pulls out the tension reel with the thin rolled steel strip in the wound shape Can be.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Example 1 FIG. 1 is an explanatory view when a steel strip 5 is pulled out from a tension reel 6 using a coil car 1 in which four permanent magnets or electromagnets 3 are arranged on a skid portion 2 of the coil car 1, and FIG.
Is a state where the steel strip 5 wound on the tension reel 6 is placed on the coil car skid portion 2 and the diameter of the reel is reduced. FIG. (C) shows the state where the belt 5 is removed.
(a) shows a side view.

As shown in FIG. 1 (c), when the diameter of the reel is reduced, the steel strip becomes flat, and the upper part 7 of the inner peripheral surface of the steel strip comes into contact with the upper part 8 of the outer peripheral surface of the reel. Generates a frictional force, but due to the magnetic force of the permanent magnet or the electromagnet 3,
Since the steel strip 5 is attached to the skid portion 2 and the steel strip between the windings is attracted to the steel strip, the friction between the upper part 7 of the inner peripheral surface of the steel strip and the upper part 8 of the outer peripheral surface of the reel is smaller than that of the coil car. The frictional force between the steel strips and between the steel strips increases, and the shape of the steel strip 5 is prevented from becoming telescopic following the movement of the coil car 1. 6 can be easily removed.

Embodiment 2 FIG. 2 is an explanatory view when a steel strip 5 is pulled out from a tension reel 6 using a coil car 1 in which a stopper 4 that moves up and down by an air cylinder 9 is arranged on a skid portion 2 of the coil car 1. a) put the steel strip 5 wound on the tension reel 6 on the coil car skid part 2, raise the stopper 4 with the air cylinder 9 to the height of the winding thickness of the steel strip, and then reduce the reel diameter. In the reduced state, (b) shows a state in which the steel strip 5 has been removed from the tension reel 6 by moving in the direction in which the coil car 1 is removed, and (c) shows a side view of (a).

As shown in FIG. 2C, when the diameter of the reel is reduced, the steel strip becomes flat, and the upper part 7 of the inner peripheral surface of the steel strip comes into contact with the upper part 8 of the outer peripheral surface of the reel. However, since the stopper 4 is raised to the winding thickness of the steel strip 5, the inner peripheral portion of the steel strip is prevented from being pulled out in a telescopic shape, and the shape of the steel strip 5 becomes a telescopic shape. And the steel strip 5 having a small winding thickness can be easily removed from the tension reel 6. Since the stopper 4 is raised only to the height of the winding thickness of the steel strip 5, there is a gap between the lower inner peripheral surface 10 of the steel strip and the lower outer peripheral surface 11 of the reel. Outer surface lower part 11
Does not come into contact with the reel and does not damage the coating on the reel surface.

Embodiment 3 FIG. 3 shows a coil car 1 in which a stopper 4 and an electromagnet 5 which are raised by a coil spring 12 are arranged on a skid portion 2 of the coil car 1.
FIG. 4A is an explanatory view when the steel strip 5 is pulled out from the tension reel 6 by using (a). The steel strip 5 wound on the tension reel 6 is placed on the coil car skid portion 2 and the electromagnet 3 is excited. After that, the state where the reel diameter is reduced,
(a ′) is a side view of (a), (b) is a state in which the coil car 1 is moved in a direction of extracting and the steel strip 5 is partially removed from the tension reel 6, and (c) is a state in which the steel strip 5 is removed from the tension reel 6. The state where the band 5 is completely removed is shown.

As shown in FIG. 3 (a '), since the stopper 4 is raised by the coil spring 12, even if the reel diameter is reduced,
The upper surface of the stopper 4 is in contact with the lower portion 11 of the outer peripheral surface of the reel. After removing the steel strip 5 from the tension reel 6,
As shown in FIG. 3 (c), since it is raised by the coil spring 12,
The stopper 4 is raised above the winding thickness of the steel strip 5.
When the diameter of the reel is reduced, the steel strip 5 is flattened, and the upper part 7 of the inner peripheral surface of the steel strip and the upper part 8 of the outer peripheral surface of the reel are in contact with each other.

When the steel strip 5 wound on the tension reel 6 is placed on the coil car skid portion 2 to excite the electromagnet 3, the reel diameter is reduced, and the coil car 1 is moved in a direction in which the coil car 1 is removed. The steel strip 5 can be removed from the tension reel 6 by preventing the shape of the strip 5 from becoming telescopic. At this time, the magnetic force of the electromagnet 3 is
However, when the winding thickness of the steel strip 5 increases, the magnetic force rapidly decreases, and when the magnetic force does not reach the inner circumferential surface of the steel strip, the inner circumferential portion of the steel strip tends to form a telescope. . However, at this time, since the stopper 4 has risen to the lower portion 11 of the outer peripheral surface of the reel, the shape of the steel strip 5 is prevented from becoming telescopic. As described above, by using the permanent magnet or the electromagnet 3 and the stopper 4 in combination, it is possible to prevent the shape of the steel strip from being telescoped when removing the steel strip,
The steel strip 5 having a small winding thickness can be easily removed from the tension reel 6.

The above is an example in which one stopper 4 is provided on the reel removing side. As shown in FIG. 4, by providing a plurality of stoppers 4, the steel strip 5 can be coiled when the steel strip is removed. The degree of freedom of the mounting position when mounting on the car skid portion is increased, and workability is improved. When removing the steel strip, the stopper prevents the inner peripheral part of the steel strip from being pulled out in a telescopic manner due to the frictional force between the upper part of the outer peripheral surface of the reel and the upper part of the inner peripheral surface of the steel strip as the coil car moves. In addition, the steel strip 5 is prevented from being telescope-shaped, and the steel strip 5 having a small winding thickness can be easily pulled out from the tension reel 6.

[0027]

As is apparent from the above description,
Since the coil car of the present invention can prevent the shape of the steel strip from being telescoped when removing the steel strip,
A steel strip having a small winding thickness and easy to flatten can be easily removed from the tension reel. Therefore, it is not necessary to increase the winding thickness of the steel strip including the non-defective part in addition to the defective part, and accordingly, the yield of the product is improved and the productivity is also improved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram when a steel strip is pulled out from a tension reel using a coil car in which a permanent magnet or an electromagnet is disposed on a skid portion of the coil car according to the present invention.

FIG. 2 is an explanatory diagram when a steel strip is pulled out from a tension reel using a coil car in which a stopper is provided in a skid portion of the coil car according to the present invention.

FIG. 3 is an explanatory view when a steel strip is pulled out from a tension reel by using a coil car in which a stopper that moves up and down by a coil spring and an electromagnet are arranged on a skid portion of the coil car according to the present invention.

FIG. 4 is a diagram showing an example of a coil car according to the present invention in which a plurality of stoppers are provided.

FIG. 5 is an explanatory diagram when a steel strip wound with a large winding thickness in the related art is extracted from a tension reel.

FIG. 6 is an explanatory diagram when a steel strip wound with a small winding thickness in the related art is pulled out from a tension reel.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Coil car, 2 ... Skid part, 3 ... Permanent magnet or electromagnet, 4 ... Stopper, 5 ... Steel band, 6 ... Tension reel, 7 ... Steel band inner peripheral surface upper part, 8 ... Reel outer peripheral surface upper part, 9
... air cylinder, 10 ... lower part of inner peripheral surface of steel strip, 11 ... lower part of outer peripheral surface of reel, 12 ... coil spring, 13 ... inner peripheral surface of steel strip, 14 ... outer peripheral surface of reel, 15 ... telescope shape.

Claims (3)

[Claims] 1. A coil car, wherein a permanent magnet or an electromagnet for adsorbing a steel strip is disposed on the coil car skid portion. 2. A coil car having a coil car skid part provided with a stopper which can be moved up and down. 3. The coil car according to claim 1, wherein the stopper and the permanent magnet or the electromagnet are arranged in the coil car skid portion in order from the reel extracting side.