JP2665862B2 - Step detecting device for inner circumference of metal strip 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 apparatus for correcting the inner peripheral edge of a coil in advance and detecting a coil step when automatically wrapping the inner circumference of a metal strip coil such as a steel strip by an automatic wrapping apparatus. About.

[0002]

2. Description of the Related Art When packing a metal strip coil such as a steel strip, the inner and outer peripheries of the coil are covered with a wrapping paper. In the packing of the metal band coil, the inner circumference of the coil is wrapped by a dedicated coil inner circumference automatic wrapping apparatus. The apparatus includes an expanding / reducing drum having a plurality of divided segments and a mechanism for expanding / reducing each segment in a radial direction, and a wrapping paper supply for supplying wrapping paper of a predetermined size to the expanding / reducing drum and winding the wrapping paper around the drum. Machine, and a drum moving device that inserts the expansion / contraction drum into the inner periphery of the metal band coil.When wrapping the inner periphery of the coil with wrapping paper, the expansion / contraction drum temporarily wound with wrapping paper is used. The drum is inserted into the coil cylindrical hole, and the diameter of the drum is expanded to pack the inner circumference.

[0003] In the packaging operation of the inner periphery of the coil, it is necessary to detect a step caused by the inner peripheral end of the coil or a band in order to completely automate the packaging, and various coil step detecting devices have conventionally been used. . The step detecting device includes a contact-type step detecting a step by using a roller rotating in contact with a coil inner periphery at a rod end of a cylinder mounted at a right angle to an expanding / reducing drum shaft of the coil inner peripheral automatic packaging device. Detection sensors are known.

[0004]

Incidentally, the inner peripheral end of a metal band coil such as a steel band may hang down due to its own weight or curling. In particular, if the metal band becomes thinner, the inner peripheral end of the coil may hang down. It becomes considerably large. FIG. 5 illustrates a hanging mode of the inner peripheral end of the metal band coil.
FIG. 1A shows the case where the tip of the inner peripheral end 1-1 of the metal band coil 1 is hung down but is in contact with the inner peripheral wall of the metal band coil 1, and FIG. It is the case where it hangs down. When the step of the inner circumference of the metal band coil in which the inner peripheral end of the coil hangs down and a gap is formed between the coils is detected by the contact type sensor as described above, an excessive load is applied to the step detecting device, and the step Not only cannot be performed smoothly, but also causes local deformation of the coil, indentation, and erroneous detection.

The present invention solves the above-mentioned problem caused by the drooping of the inner peripheral end of the coil when detecting the step on the inner periphery of the metal band coil by the contact type step detecting device. It is an object of the present invention to provide a device capable of detecting a step on the inner periphery of a metal band coil so that no occurrence of a gap occurs.

[0006]

SUMMARY OF THE INVENTION The present invention, as a means for solving the above problems, provides a step detecting device provided with a jig for correcting the inner peripheral end of the coil. Adjacent to the contact-type step detecting device mounted on the expansion / contraction drum shaft of the automatic packaging device so as to be able to expand and contract in the radial direction, a coil inner circumference sagging correction jig provided with a mechanism for expanding and contracting a plurality of divided pressing members in the radial direction is provided. A step detecting device on the inner periphery of a metal strip coil, which is rotatably mounted on an expansion / contraction drum shaft via a bearing.

[0007]

The inner peripheral automatic wrapping apparatus for metal strip coils includes a plurality of divided segments, an expansion / contraction drum provided with a mechanism for enlarging / reducing each segment in a radial direction, and a wrapping paper of a predetermined size supplied to the expansion / contraction drum. It is composed of a wrapping paper feeder wound around the drum outer periphery, and a drum moving machine that inserts the expansion / contraction drum into the inner periphery of the metal band coil.
First, the enlarging / reducing drum is reduced in diameter, and a wrapping paper is temporarily wound around the outer periphery thereof. The enlarging / reducing drum is made to stand by near the inner peripheral entrance of the metal band coil, and a step of the inner periphery of the coil is detected by the apparatus of the present invention.

As the step detecting device for the inner circumference of the coil, there are the contact type sensor (vibration meter) and the gap type sensor. In the case of the gap type sensor, if the measuring distance (gap) is large, the measuring accuracy is poor. If the sensor is brought close to the inner peripheral surface of the coil so as to reduce the gap in order to increase the measurement accuracy, there is a possibility that the sensor may hit and hit the hanging steel strip and may be damaged, and the accuracy may be reduced. On the other hand, in the case of a contact-type sensor, the step is detected by guiding it with a roller, so it is resistant to run-out of the device body, and the measurement gap can be reduced by suppressing the inner periphery from sagging, enabling high-precision measurement. It has the characteristic that it is. For this reason, the present invention employs a contact-type sensor for the step detecting device on the inner periphery of the coil.

In the apparatus according to the present invention, a jig for correcting inner circumferential sag of the coil is rotatably attached to the shaft end of the expansion / contraction drum shaft, and a plurality of divided pressing members are provided at predetermined positions in the radial direction. As a result, the inner peripheral end of the coil is pushed up and fixed to the inner peripheral wall of the coil. A fluid pressure cylinder is used for the expansion and contraction mechanism of the divided holding member and the expansion and contraction mechanism of the step detecting sensor.

When the hanging of the inner peripheral end of the coil is corrected by the diameter expansion of the divided holding member, the step of rotating the expanding / reducing drum is detected by a step detecting device integrally attached to the expanding / reducing drum shaft. I do. At this time, since the coil inner circumference sagging correction jig is rotatably attached to the expansion / contraction drum shaft, it does not move with respect to the metal band coil even when the step detecting device rotates.

Since the divided holding members of the jig for correcting the inner circumferential sag of the coil have a mechanism for independently expanding and contracting, even if a deviation occurs between the metal band coil core and the axis of the expanding / contracting drum shaft, each of the divided pressing members can be displaced. Thus, the inner peripheral end of the coil can be pressed uniformly against the inner peripheral wall of the coil.

According to the apparatus of the present invention, since the inner peripheral end of the coil can be pressed against the inner peripheral wall of the coil and the step can be detected without any gap, the pressing force of the roller of the step detecting device can be reduced. Thus, there is no possibility that the metal strip coil is locally deformed or an impression remains, and the detection can be performed with high accuracy. Further, each of the divided pressing members of the coil inner peripheral sagging correction jig does not slide on the coil inner peripheral wall, and the selection of the material does not cause any damage on the coil inner peripheral surface.

[0013]

FIG. 1 is a schematic view showing the construction of a metal band coil inner periphery automatic packaging apparatus to which the present invention is applied. FIG. 2 is an example of a contact type step detecting device for the metal band coil inner periphery according to the present invention. FIG. 3 is a front view on the line AA in FIG. 2, and FIG. 4 is a longitudinal sectional front view on the line BB in FIG.

An automatic inner wrapping apparatus for a metal strip coil includes an expansion / contraction drum 20 having a mechanism for expanding / contracting a plurality of divided segments in the radial direction and a mechanism for selectively enlarging / contracting only predetermined segments in the radial direction. A wrapping paper transport unit 22 for feeding a wrapping paper 21 having a predetermined size to which an adhesive tape is adhered to the expansion / contraction drum 20, a magnet conveyance unit 24 for feeding a flexible plate magnet 23 having a predetermined size to the expansion / contraction drum 20, A drive unit 25 for moving the magnet transport unit to an arbitrary position along the axial direction of the enlargement / reduction drum 20, and a drive unit 26 for inserting the enlargement / reduction drum 20 into the inner periphery of the metal band coil 1.

First, a plate-like magnet 23 is held by vacuum on a predetermined segment of the expansion / contraction drum 20, and a wrapping paper 21 is temporarily wound thereon. In this manner, the wrapping paper 21 mounted on the outer circumference of the
And the plate-shaped magnet 23 are transferred to the inner periphery of the metal strip coil 1 to perform inner periphery packaging.

As shown in FIGS. 2, 3 and 4, the step detecting device for the inner circumference of the metal band coil according to the present invention is provided in a contact type with a jig 3 for correcting the inner circumference sag of the coil at the axial end of the expansion / contraction drum shaft 2. The step detecting jig 4 is attached, and the coil inner circumference sagging correction jig 3 is mounted on a disk 3-2 rotatably attached to the shaft end of the expansion / contraction drum shaft 2 via a bearing 3-1. Air cylinder 3-3 with multiple (here 6) guide rods
Are radially mounted, and an arc-shaped divided pressing member 3-4 is mounted at the rod end of each air cylinder. The split holding member may be made of a material that does not cause flaws or the like to adhere to the metal band, for example, any of hard rubber, resin, leather, and cotton cloth.

The contact type step detecting jig 4 includes an expansion / contraction drum shaft 2.
An air cylinder 4-2 with a guide rod that operates in the radial direction is mounted on a fixed arm 4-1 fixed by a key or the like, and a shaft pin 4-4 is mounted on a fixed base 4-3 attached to the rod end of the air cylinder. A bracket 4-5 that can be swung in the circumferential direction as a fulcrum is attached, a pair of rollers 4-6 are attached to the bracket, and a step detecting sensor (vibrometer) 4-7 is attached to one end of the bracket.
The roller 4-6 is pressed against the inner periphery of the metal band coil to hold the position of the level difference detection sensor 4-7. In the case of the contact type step detecting jig 4, the pair of rollers 4-6 are pressed against the inner surface of the metal band coil by the action of the air cylinder 4-2, and are always in contact with the inner peripheral surface of the metal band coil by the swing mechanism.

The expansion / contraction drum shaft 2 is supported by the drive unit 26 so as to be vertically movable, and is installed so as to be rotationally driven by a motor.

When detecting the step of the metal band coil 1 by the step detecting device having the above structure, the expansion / contraction drum 20 is made to stand by near the inner peripheral entrance of the metal band coil 1, and at this position, the shaft end of the expansion / contraction drum shaft 2 is first placed. By operating the air cylinder 3-3 of the jig 3 for correcting the inner circumferential sagging of the coil, the divided pressing member 3-4 is expanded in diameter, and the inner circumferential end of the coil is pressed and fixed to the inner circumferential wall of the coil. Subsequently, the air cylinder 4-2 of the contact step detecting jig 4 is operated to press the roller 4-6 against the inner peripheral surface of the coil, thereby rotating the expansion / contraction drum shaft 2. At this time, since the coil inner circumference sagging correction jig 3 is rotatably supported by the expansion / contraction drum shaft 2, only the contact type step difference detection jig 4 rotates integrally with the expansion / contraction drum shaft 2, and the coil inner circumference sagging correction jig. The tool 3 is kept stationary. Therefore, the step detection on the inner circumference of the metal band coil is performed without any gap in the coil, so that the metal band coil is not locally deformed by the pressing force of the roller and no indentation is left on the coil, and the step of the coil is not changed. Can be accurately detected.

Here, the step detecting device in which one set of the coil inner circumference sagging correction jig 3 is attached to the expansion / contraction drum shaft 2 is shown, but the coil inner circumference sagging correction jig 3 is adapted to the width of the metal band coil. Several sets may be provided continuously, or a configuration may be provided on both sides of the contact type step difference detecting jig 4.

[0021]

As described above, the device of the present invention is:
The coil inner circumference droop correction jig that corrects the inner peripheral edge of the metal band coil can detect the step on the inner peripheral end of the coil without any gap in the coil. The metal band coil is not locally deformed and no indentation remains on the coil, and the step of the coil can be detected with high accuracy. Further, since the coil inner circumference sagging correction jig is kept stationary with respect to the metal band coil, the inner peripheral surface of the metal band coil is not damaged. Further, the apparatus of the present invention has an advantage that it can cope with a change in the inner diameter of the metal strip coil by providing a margin in the stroke of the hydraulic cylinder of the jig for correcting the inner circumferential sag of the coil and the contact type step detecting jig. Therefore, according to the apparatus of the present invention, it is possible to achieve a great effect on complete automation of the inner peripheral packaging of the metal band coil and improvement of the efficiency of the packaging operation.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing the configuration of an automatic inner peripheral packaging apparatus for metal strip coils according to the present invention.

FIG. 2 is a partially cutaway side view showing one example of a contact-type step detecting device for the inner periphery of a metal band coil according to the present invention.

FIG. 3 is a front view on the line AA of FIG. 2;

FIG. 4 is a vertical sectional front view taken along line BB of FIG. 2;

5A and 5B are schematic diagrams showing examples of a manner in which the inner peripheral end of the metal band coil hangs down. FIG. 5A shows a case where the tip of the inner peripheral end of the metal band coil 1 hangs down but is in contact with the inner peripheral wall of the coil.
FIG. 2B shows a case where the inner peripheral end is hung down in a space around the inner periphery of the coil.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal band coil 2 Expansion / contraction drum shaft 3 Coil inner circumference sagging correction jig 3-3 Air cylinder with guide rod 3-4 Dividing holding member 4 Contact type step detecting jig 4-2 Air cylinder with guide rod 4-6 Roller 4 -7 Step detection sensor 20 Expansion / contraction drum 21 Wrapping paper 22 Wrapping paper transport unit 23 Plate magnet 24 Magnet transport unit 25, 26 Drive unit

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Noritoshi Akiyama, Inventor Sumitomo Metal Industries Co., Ltd. 4-5-33, Kitahama, Chuo-ku, Osaka-shi, Osaka (72) Inventor Reisuke Dodori 3 Oazai, Kashima-cho, Kashima-gun, Ibaraki No. Sumitomo Metal Industries Co., Ltd.Kashima Works (72) Inventor Isamu Ishii 342-3 Kanadacho, Kawanoe-shi, Ehime (72) Inventor Masamichi Sugi 4-7-16, Kaki, Niihama-shi, Ehime (56) References 1-167016 (JP, A)

Claims (1)

(57) [Claims] 1. An expanding / contracting drum having a plurality of divided segments and having a mechanism for enlarging / reducing each segment in a radial direction,
An inner periphery automatic of a metal band coil comprising a wrapping paper feeder for supplying a wrapping paper of a predetermined size to the expansion / contraction drum and winding the wrapper around the drum, and a drum moving device for inserting the expansion / contraction drum into the inner periphery of the metal band coil. A contact-type step detecting device for the inner circumference of a metal band coil in a packaging device, wherein a plurality of divided pressing members are provided adjacent to a contact-type step detecting device which is attached to a scaling drum shaft of the packaging device so as to be able to expand and contract in a radial direction. A step detecting device for the inner periphery of a metal strip coil, wherein a jig for correcting inner circumferential sag provided with a mechanism for expanding and contracting in a radial direction is rotatably mounted on a shaft of the expanding and contracting drum via a bearing.