JPH01205817A - Coil unwinder provided with coil end face holding plate - Google Patents

Abstract

PURPOSE:To prevent a coil impossible to unwind and a coil having a defective ear part from occurring by pulling pads in sequence from the outside in the radial direction whenever the diameter of the loose coil is reduced by unwinding it and it reaches the outer edge of the pad. CONSTITUTION:When the loose coil 1 set to a mandrel 10 is unwound, the loose coil 1 is unwound by a coil external diameter gauge 11 in the form of distance measurement while the diameter of the loose coil 1 is measured. Right before the outside pad of end face holding pads 5 which protrude along the end face of the loose coil 1 becomes equal to the diameter of the loose coil 1, the pad is drawn in to avoid interference with the strip unwound from the coil 1 and defective ear parts are prevented from occurring.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a coil end face presser for preventing telescopic protrusion of the loose coil when unwinding the loose coil set in a down-end shape on a mandrel in a strip processing line. This invention relates to a coil unwinding device equipped with a coil end face press plate that can prevent coil edge defects caused by contact between the coil edge and the coil edge.

<Prior Art> Strips, etc., which have been treated with an inorganic coating on their surface, are processed by winding the coil loosely instead of tightly winding it. When such a loose coil is set in a down-end shape on the mandrel of an unwinding device and unwound, the strip slips laterally within the loose coil and protrudes from the end face of the coil (retracts from the opposite side), resulting in a telescopic protrusion. occurs.

If this telescopic protrusion occurs beyond the stroke limit of the center position function of the unwinding device, the coil cannot be unwound any further. In order to prevent such protrusion, conventionally a coil end presser plate is inserted into a mandrel together with the loose coil, and the strip is rewound while the end presser plate prevents the telescopic protrusion.

FIG. 5 and FIG. 6 show a coil unwinding device using a conventional coil end pressing plate, and the coil unwinding device 4
Coil end face press plates 2 are attached along both end faces of a loose coil 1 set in a down-end shape on a mandrel 10. The diameters of the loose coil 1 and the coil end face pressing plate 2 are approximately equal at the beginning of unwinding.

As described above, as the strip 3 is unwound from the loose coil 1 while both end faces of the loose coil 1 are prevented from protruding in a telescopic shape with the coil end face press plate 2, the diameter of the loose coil 1 gradually increases as shown by the chain line. becomes smaller.

<Problem to be solved by the invention> When the diameter of the loose coil l unwound in this way is small (
Then, since the moving direction and speed of the strip 3 and the coil end presser plate 2 are different at the unwinding port, if the strip 3 and the coil end presser plate 2 compete with each other, the coil end presser plate 2 will move at the part corresponding to A. There is a problem in that troubles such as folding of the edges of the strip 3 cause defects in the edges of the strip.

The present invention solves the above-mentioned conventional problems and prevents coil edge defects caused by interference between the coil end presser plate and the loose coil ear. The purpose is to provide a device.

Means for Solving the Problems> In order to solve the above-mentioned problems, it would be sufficient to reduce the diameter of the coil end face press plate to follow the decrease in the coil diameter, but this is difficult in reality. Therefore, we focused on creating a double structure for the coil end holding plate, and arranging a coil end holding pad divided into several parts in the radial direction on the inner side facing the coil to avoid interference with the strip. As a result of various studies, we have completed the present invention.

To achieve the above object, a coil unwinding device equipped with a coil end pressing plate of the present invention will be described with reference to FIGS. 1 to 4 corresponding to embodiments.
In a coil unwinding device 4, a coil end face holding plate 2 for preventing telescopic extrusion is attached along both end faces of a loose coil 1 set in a down shape. A plurality of radially divided end face holding pads 5 which can be freely taken out and removed are disposed on the inner surface of the holding plate 2 in the circumferential direction, and the end face holding pads 5 are projected along the end face of the loose coil 1. Each time the diameter of the loose coil decreases by unwinding and reaches the outer edge of the end face presser pad 5, the loose coil is drawn in sequentially from the end face presser pad 5 located on the outer side in the radial direction.

According to the present invention, the diameter of the loose coil l is reduced by unwinding a plurality of radially divided end face holding pads 5 on the inner surface of the coil end holding plate 2, which can be freely taken in and out. Each time the outer edge of the presser plate 5 is reached, the end face presser plate 5 located on the outer side in the radial direction is sequentially pulled in.

For this reason, both end faces of the loose coil l are guarded by end face holding pads 5 until just before it is unwound, which not only prevents telescopic protrusion but also allows the strip 3 to be rewound to be held at the unwinding opening by the end face holding pads 5. There is no interference with the coil end face pressing plate 2 as well as with the coil end face pressing plate 2, and it is possible to prevent the strip 3 from being damaged.

<Example> Examples of the present invention will be described below based on the drawings. 1st
The figure and FIG. 2 show an embodiment of the present invention, which is divided into radial sections on the inner surface of an end presser plate 2 attached to both end surfaces of a loose coil 1 set on a mandrel 10 of an unwinding device 4. A plurality of end face pressing pads 5 that can be freely moved in and out are provided.

The shape of the end presser pad 5 divided in the radial direction is such that the surface facing the loose coil 1 is rectangular, and each division can be independently moved in and out from the inside of the end press plate 2. In this case, four rows are arranged in the circumferential direction of the end face holding plate 2. In addition, if the division size of the end face presser pad 5 is too large, there will be a large amount of free parts on the end face of the coil immediately after the pad 5 is pulled in, and the original purpose of the telescopic protrusion will not be fully fulfilled, so the division size should be 100.
Select an appropriate size less than m.

The rear end of each end face presser pad 5 is connected to a respective hydraulic cylinder 6.
It is connected to a piston 7 that expands and contracts inside, and the piston 7 is actuated by supplying pressure oil from oil pressure f19 to the hydraulic cylinder 6 via the rotary joint 8. The operating mechanism of the end face pressing pad 5 is not limited to a hydraulic cylinder type, but may be a solenoid type, a spring type, or other m-structure.

When unwinding the loose coil l set on the mandrel 10, the diameter of the loose coil l is measured by the distance measuring coil outer diameter measuring device 11, and the end face holder protrudes along the end face of the loose coil l. This is to avoid interference with the strip 3 which is pulled in just before the outer pad 5 becomes equal to the diameter of the loose coil 1 and is unwound from the coil 1, thereby avoiding ear defects.

In addition to the distance measurement method, the coil outer diameter can be measured by calculating the coil diameter from mandrel rotation and deflation crawl rotation speed, or by incorporating a touch sensor into the end holding plate. - Appropriate means can be used, such as setting up a hook mechanism so that when the outer diameter of the coil is reached, the hook is released and the end pressing pad is retracted by the force of the spring.

FIG. 3 shows another embodiment of the present invention, in which the dividing portions of a plurality of radially divided end-face holding pads 5 in the coil end-face holding plate 2 are stepped. This can prevent the end of the coil from entering the gap created in the divided portion of the end pressing pad and damaging the ear.

FIG. 4 shows still another embodiment of the present invention,
A plurality of end face presser plates 5 divided in the radial direction are stepped and the portion facing the end face of the coil extends over the entire circumference. This prevents the end of the coil from entering the gap that occurs and reduces the surface pressure that the end pressing pad 5 receives.

<Effects of the Invention> Since the present invention has the above-mentioned configuration, damage to the coil ears due to telescopic protrusion and interference with the coil end press plate when unwinding the loose coil set on the mandrel of the coil unwinding device can be avoided. Therefore, it is possible to avoid the inability to unwind during unwinding and the occurrence of a defective coil in the ear part, which has a great effect.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a front view taken along arrow A-A in FIG. 1, FIG. 3 is a front view showing another embodiment of the invention, and FIG. The figure is a front view showing still another embodiment of the present invention, and FIGS. 5 and 6 are side and front views showing a conventional example. DESCRIPTION OF SYMBOLS 1... Loose coil, 2... Coil end surface holding plate, 3... Strip, 4... Unwinding device, 5... End surface holding pad, 6... Hydraulic cylinder,
7...Piston, 8...Rotary joint, 9...m pressure B, 10...mandrel, 11...coil outer diameter measuring device. Patent applicant: Kawasaki Steel Corporation Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] In a coil unwinding device, a coil end presser plate is installed along both end faces of a loose coil set in a down-end shape on a mandrel to prevent coil extrusion in a telescopic shape, and the coil end presser plate faces oppositely to the end face of the loose coil. A plurality of radially divided end face holding pads that can be taken in and out are arranged in the circumferential direction on the inner surface of the coil, and the pads are protruded along the end face of the loose coil, and the diameter of the loose coil is reduced by unwinding. A coil unwinding device equipped with a coil end face press plate, characterized in that the coil is pulled in sequentially from the pad located on the outside in the radial direction each time the pad reaches the outer edge of the pad.