JP2551409Y2 - 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 a device for detecting a step caused by an inner peripheral end of a coil or a band in advance when automatically wrapping an inner periphery of a metal band coil such as a steel band by an automatic wrapping device. .

[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 detects a step by using a roller rotating in contact with the inner periphery of the coil at the tip of a rod of a fluid pressure cylinder mounted at right angles to the expanding / reducing drum shaft of the coil inner peripheral automatic packaging device. It has been known.

FIG. 7 shows an example of a conventional step detecting device for the inner circumference of the coil. The supporter is provided at the tip of the rod of the air cylinder 1 with the guide rod which is mounted at right angles to the expanding / reducing drum shaft of the automatic inner circumference packaging device for the coil. 2 is mounted on the support base 2 so as to be rotatable about a shaft 3 as a fulcrum.
The roller 6 is attached to the tip of the arm 4 which is constantly biased toward the inner circumference of the coil, and the step detecting sensor 8 is mounted on a base plate 7 protruding from the arm tip. Note that the step detecting sensor is a kind of deviation sensor, and a change in the distance or angle between the sensor detecting surface and the inner surface of the coil changes into a voltage change, and the step is detected as a step when the voltage change is equal to or more than a set value. It has a mechanism.

That is, in the case of this kind of coil inner peripheral step detecting device, the expansion / contraction drum shaft is rotated while the roller 6 is pressed against the inner peripheral surface of the metal band coil 9 by the air cylinder 1 with the guide rod. When the change in the voltage of the step detecting sensor 8 exceeds the set value during the rotation, it is detected that there is a step at that position.

[0006]

However, in the step detecting device having the structure in which the step detecting sensor 8 is attached to the arm 4 guided by one roller 6 as described above,
When the center O ₂ of the metal strip coil core O ₁ and the detector is shifted, the distance A ₁ between step detecting sensor 8 and the metal strip coil inner circumferential surface by the rotational position of the detection _device, A ₂ and the angle θ
₂ may change, and the step detecting sensor 8 may operate in a place other than the place to be detected, which may cause erroneous detection. Furthermore, since the center of the fluid pressure cylinder and the center of the step detecting sensor are largely displaced, it is necessary to change the stroke of the air cylinder according to the inner diameter of the metal band coil, for example, when a two-stage cylinder or the like is required. For example, there is a disadvantage that the apparatus becomes complicated.

This invention is intended to solve the above-mentioned drawbacks of the conventional step detecting device, and to provide a step detecting device at the inner periphery of the metal band coil which can detect the step accurately even if the center of the step detecting device is displaced from the coil center. It is assumed that.

[0008]

According to the present invention, as a means for solving the above-mentioned problem, two rollers for guiding the step detecting device are provided.
An arm with a roller (object to be detected) that is provided with a pair of rollers and a swing mechanism is provided to the pair of rollers so that the rollers are always in contact with the inner periphery of the metal coil, and is further in contact with the inner periphery of the metal coil by a spring. Is provided integrally with the roller with the oscillating mechanism, and by detecting the movement of the arm with the roller, the step of the inner circumference of the coil is indirectly detected. A fluid pressure cylinder mounted at right angles to the expansion / contraction drum shaft is pivotally mounted with a bracket that can swing in the circumferential direction with the center as a fulcrum,
A pair of rollers that are rotatable in contact with the inner peripheral surface of the coil are provided at both ends of the bracket, and a rod-shaped detection object that has the roller at one end and is urged toward the inner peripheral side of the metal band coil by a spring. Pivotally pivotally coaxially with the bracket,
A step detecting sensor for detecting the amount of movement of the detected object is attached to one end of the oscillating bracket toward the center of the metal coil, and a pair of rollers is pressed against the inner peripheral surface of the coil by the fluid pressure cylinder. A step detecting device for detecting an amount of movement of an object to be detected in which a roller is pressed against an inner periphery of a metal coil by a spring by the step detecting sensor. is there.

[0009]

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 diameter of the expansion / contraction drum is reduced, and a wrapping paper is temporarily wound around the outer periphery thereof.

Two rollers mounted on a bracket which can be swung in the circumferential direction with the center as a fulcrum are pressed against the inner periphery of the metal strip coil by the action of a hydraulic cylinder to which the bracket is mounted. Even if the metal band coil core and the rotation center of the detecting device are displaced, the two rollers are always in contact with the inner peripheral surface of the metal band coil by the swing mechanism centering on the fulcrum of the bracket. A step detecting sensor is attached to one end of the bracket toward the center of the metal coil.

The object to be detected is rotatably attached to the same fulcrum as the bracket, and a roller attached to one end is pressed by a spring so as to come into contact with the inner periphery of the metal coil. The movement is increased by the detecting body, and the movement is detected by a step detecting sensor attached to one end of the bracket.

[0012]

FIG. 1 is a schematic diagram showing an example of the configuration of an automatic packaging apparatus for the inner periphery of a metal strip coil to which the present invention is applied. FIG. FIG. 3 is a side view, FIG. 3 is a front view of the above-described step detecting device, FIG. 4 is an enlarged plan view of the above-described step detecting device, and FIGS. 5 and 6 are explanatory views showing the principle of step measurement by the above-described step detecting device. is there.

An inner peripheral automatic packaging apparatus for a metal strip coil includes an expansion / contraction drum 10 provided with 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 12 for feeding a wrapping paper 11 having a predetermined size to which an adhesive tape is adhered to a scaling drum 10, a magnet transporting unit 14 for feeding a flexible plate magnet 13 having a predetermined size to the scaling drum 10, and A drive unit 15 for moving the magnet transport unit to an arbitrary position along the axial direction of the expansion / contraction drum 10, and a drive unit 16 for inserting the expansion / contraction drum 10 into the inner periphery of the metal band coil 9.

A plate-like magnet 13 is firstly held in a predetermined segment of the expansion / contraction drum 10 by vacuum, and a wrapping paper 11 is temporarily wound thereon. In this manner, the wrapping paper 11 and the plate-shaped magnet 13 mounted on the outer periphery of the metal band coil 9 are transferred to the inner periphery of the metal band coil 9 to perform inner wrapping.

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 has a guide rod at the shaft end of the expansion / contraction drum shaft 10-1 via the base plate 21. An air cylinder 22 is mounted at a right angle to the drum axis, and a coil 23 and a fixed base 23 mounted on the center line of the air cylinder at the rod end of the air cylinder 22.
The bracket 24 is attached so as to be rotatable in the circumferential direction. The bracket is pivotally mounted at its center by a shaft pin 25 and swings in the circumferential direction with the shaft pin 25 as a fulcrum. Two rollers 26-1 and 26- are provided at both ends of the bracket.
2 is rotatably mounted on the shaft. Then, a step detecting sensor 27 is attached to one end of the bracket toward the coil center on a base plate 28 protruding from the bracket 24.

Numeral 30 denotes an object to be detected.
The roller 26-3 has a step detecting roller 26-3 at a position substantially opposed to one of the rollers 26-2, and swings so that the multi-end is located at a position opposed to the step detecting sensor attached to the swing bracket 24. The step detecting roller 26-3 is always pivotally attached to the same rotating shaft pin 25 as the type bracket 24 and is hung between the bracket fixing stand 23 and the step detecting roller 26-3 so as to always contact the inner periphery of the metal coil. Being energized.

That is, the coil inner peripheral step detecting device comprises a pair of rollers 26 attached to a circumferentially swingable bracket 24 attached to a rod tip of an air cylinder 22 with a guide rod provided at right angles to the expansion / contraction drum shaft 2. -1, 2
6-2 and the step detecting sensor 27 are mounted, and a pair of rollers 26-1 and 26-2 are pressed against the inner periphery of the metal band coil to hold the position of the step detecting sensor 27. The step detecting sensor 27 detects the movement of the detection object 30 in which a step detecting roller 26-3 provided at one end having the same rotation fulcrum as the bracket 24 is provided by the spring 32 so as to be in contact with the inner periphery of the metal coil. This is a mechanism that performs

When detecting the level difference of the metal band coil 1 by the above-mentioned device, the expansion / reduction drum 10 is made to stand by near the inner peripheral entrance of the metal band coil 9, and the air cylinder 22 of the level difference detection device is operated at this position to operate the roller. 26-1 and 26-2 and the step detecting roller 26-3 are pressed against the inner peripheral surface of the coil to rotate the expansion / contraction drum shaft 2. At this time, the movement of the step detecting roller 26-3 is transmitted to the detection target 30 and increased, and the step detecting sensor 27 indirectly detects the step on the inner circumference of the metal coil.

That is, in the step detecting apparatus having the above structure, FIG. 5 shows a pair of rollers 26-1 and 26-2 attached to the oscillating bracket 24 and a step detecting roller 26- attached to the detection target 30. 3 shows a positional relationship between the step detecting sensor 27 and the detection target 30 in a state where the roller 26-1 has moved to the B-1 plane from a state where the roller 3 is present in the same B plane. Here, the center distance _{l 1} are a pair of rollers 26-1 which is mounted on the neck sustaining oscillating bracket 24 and 26-2, _{l 2}
Indicates the center distance (center shift amount) between the roller 26-2 and the step detecting roller 26-3, and is a very small dimension. l ₃
Indicates the center distance between the step detecting roller 26-3 and the step detecting sensor 27.

[0020] In FIG. 5, ignoring center distance _{l 2} of the roller 26-2 and the step detection roller 26-3 as negligible dimensions, theta ₁ and theta ₂ become approximately equal, _{A 1} and _{A 2} Are also substantially equal. That is, the positional relationship with the step detecting sensor 27 due to the movement of the roller 26-1 is constant without changing.

FIG. 6 shows the positional relationship between the step detecting sensor 27 and the object 30 when the step detecting roller 26-3 is further moved from the surface B to the surface B-1 from the state shown in FIG. FIG. Here, _{l 4} is the step for detection roller 2
Distance from center of 6-3 to fulcrum P (axial pin 25), l
Reference numeral ₅ denotes a distance from the step detecting sensor 27 to the fulcrum P. When the step detection roller 26-3 moves from B side to B-1 side, _{t 1} the amount of movement of the step detection rollers 26-3, when the amount of movement of the object to be detected 30 and _{t 2, t 1} : T
₂ = _l 4: a _{l 5.} Therefore, when l ₅ / l ₄ is large, t ₂ > t (step), and the step detecting sensor 2
7, the step t can be indirectly detected as a large movement amount.

Further, the step detecting sensor 27 has a coil core O because the two rollers are attached toward the center of the metal coil by a swing mechanism so that the two rollers are always in contact with the inner peripheral surface of the metal band coil. ₁ and be offset and the center O ₂ of the detection device can accurately detect by a step separately from the place other than the step.

[0023]

According to the present invention, as described above, two rollers for guiding the step detecting device are paired, and a swing mechanism is provided to the pair of rollers so that the rollers are always in contact with the inner periphery of the metal coil. The arm with the roller (object to be detected), which is in contact with the inner periphery of the metal coil with a spring, is provided integrally with the roller with the oscillating mechanism. Has an excellent effect that the step on the inner circumference of the metal coil can be reliably detected with high accuracy, especially the step of the metal coil having a small thickness. It exerts a great effect on detection.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a configuration example of an inner peripheral automatic wrapping device for a metal band coil to which the present invention is applied.

FIG. 2 is a side view showing an example of the step detecting device on the inner periphery of the metal band coil according to the present invention.

FIG. 3 is a front view of the step detecting device according to the first embodiment;

FIG. 4 is an enlarged plan view showing the same step difference detecting device.

FIG. 5 is an explanatory view showing the principle of measuring the level difference by the level difference detecting device according to the first embodiment; FIG. FIG. 4 is an explanatory diagram illustrating a positional relationship with a detection object.

FIG. 6 is an explanatory diagram showing a step measurement principle by the step detecting device according to the first embodiment, showing a positional relationship between a step detecting sensor and an object to be detected in a state where a step detecting roller has moved over the coil step at the coil step; FIG.

FIG. 7 is a front view showing an example of a conventional coil inner peripheral step detecting device.

[Explanation of symbols]

 9 Metal band coil 10-1 Expansion / contraction drum shaft 22 Air cylinder with guide rod 24 Bracket 25 Shaft pin 26-1, 26-2 Roller 26-3 Roller for detecting level difference 27 Level difference detection sensor 30 Object to be detected

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Noritoshi Akiyama 4-5-33, Kitahama, Chuo-ku, Osaka City, Osaka Prefecture Within Sumitomo Metal Industries, Ltd. (72) Innovator Reisuke Dodori 3 No. Sumitomo Metal Industries Co., Ltd.Kashima Works (72) Inventor Isamu Ishii 342-3 Kanadacho, Kawanoe-shi, Ehime (72) Inventor Masamichi Sugi 4-289068 (JP, A)

Claims (1)

(57) [Scope of request for utility model registration] 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 periphery of a metal band coil in a packaging device, wherein a bracket capable of swinging in a circumferential direction with a center as a fulcrum is mounted on a fluid pressure cylinder mounted at right angles to an expansion / contraction drum shaft of the packaging device. And a pair of rollers rotatably provided at both ends of the bracket in contact with the inner peripheral surface of the coil, and having the above-mentioned roller at one end and urged toward the inner peripheral side of the metal band coil by a spring. The object to be detected is rotatably pivoted coaxially with the bracket, and a step detecting sensor for detecting an amount of movement of the object to be detected is attached to one end of the swing type bracket toward the center of the metal coil, Said The body pressure cylinder presses a pair of rollers against the inner peripheral surface of the coil, and the spring detects that the amount of movement of the object to be detected that is pressed against the inner periphery of the metal coil is detected by a step detection sensor. An apparatus for detecting a step in the inner periphery of a metal strip coil.