JPH06166462A - Remainder of roll stock detecting device - Google Patents

Abstract

PURPOSE:To prevent failure of connection of roll stock and their needless loss by detecting proper connecting timing. CONSTITUTION:The remainder of roll stock detecting device is furnished with a metallic part 4 on a core 2 of a roll stock 1 or all over or on a part of the outer periphery of a support shaft part 3 to support the core 2, and simultaneously, it is furnished with a rotary roll 5 to press and make contact with the outer periphery of the roll stock 1. Additionally, on a bearing part 6 to support at least one end part of a rotary support shaft part 5a of the rotary roll 5, a metal detection proximity sensor 7 such as a high frequency oscillation type proximity sensor to detect of the metallic part 4 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention unwinds a roll-shaped paper sheet roll, a synthetic resin film roll or the like roll roll in a processing step such as printing, laminating, coating, slitting, or the like to be used as a processing machine. The present invention relates to a roll material unwinding residual amount detecting device in a roll material feeding part.

[0002]

2. Description of the Related Art In a roll raw material unwinding and feeding section for unwinding and feeding a raw material roll to a processing machine, it is possible to detect the unwound state of the raw material roll while the processing machine is in operation. As the device, photoelectric sensors each having a light projecting portion and a light receiving portion facing each other are provided on both sides in the vicinity of a support shaft portion supporting the center of rotation of the roll raw material, and the roll raw material supported by the support shaft portion is provided. The roll is unwound and supplied to the processing machine. As the roll diameter gradually becomes smaller, when it reaches the specified thin roll diameter, it receives the light rays from the light projecting part that was blocked by the roll roll. The unit detects the remaining amount of the unrolled roll material that is being fed in operation.

The detection signal is appropriately used as a start signal for the next replenishing operation of the new roll material, for example,
In response to the detection signal, the roll original sheet that is being fed and fed is attached to the unrolled sheet end of the next roll original that is prepared to be supported by the spare spindle in advance, and the sheets are joined together. Performing an operation to start feeding of the subsequent original fabric sheet joined to the previous original fabric sheet, and by appropriately cutting the previous original fabric sheet, the roll original fabric is cut before the roll original fabric is deficient. Sheets are joined together.

Further, as a device for detecting the unwinding remaining amount of the roll stock during the above-mentioned operation and feeding, a length slightly shorter than the known roll length of the roll stock is set as a preset value in advance, and the yard is set. When the unwinding length detected by the meter reaches its set value, the operation signal is issued to perform the next pre-prepared replenishment operation of the roll original fabric, or the roll radius is smaller than the known radius of the roll original core. By setting a large radius as the set value and calculating the radius of the roll material at that time from the unwinding rotation peripheral speed of the roll material, the next preparation is made when the calculated value reaches the set value. For example, there is a method of performing a replenishing operation of the original roll material.

[0005]

However, in the detection of the unwinding remaining amount by setting the winding length, the roll length actually used is insufficient or the winding length is excessive. In this case, the proper splicing replenishment timing (timing) may be lost, and the replenishment timing may be too late, resulting in splicing failure.Also, a known core diameter of the original roll may be set. In such a case, the diameter of the winding core varies and the joint replenishment time is likely to be too late or too early.

The present invention is intended to prevent splicing failure and unnecessary loss of raw material by detecting an appropriate splicing time.

[0007]

SUMMARY OF THE INVENTION The present invention is directed to a roll original 1
1. The metal core 4 is provided on the entire circumference or partial circumference of the outer circumference of the winding core 2 or the support shaft portion 3 that supports the winding core 2, and the rotating roll 5 that comes into pressure contact with the outer circumference of the roll material 1 is provided. Roll 5
Bearing part 6 for supporting at least one end of the support shaft part 5a
In the apparatus for detecting the remaining amount of unrolled roll material, a metal proximity sensor 7 such as a high frequency oscillation type proximity sensor for detecting the proximity of the metal part 4 is provided.

Further, according to the present invention, a metal supporting shaft portion 3 for supporting the winding core 2 of the roll raw fabric 1 is provided, and a rotary roll 5 for pressingly contacting the outer periphery of the roll raw fabric 1 is provided. The bearing portion 6 that supports at least one end of the spindle portion 5a of
A roll raw material unwinding residual amount detecting device is provided with a metal detection proximity sensor 7 such as a high-frequency oscillation type proximity sensor for detecting that the support shaft portion 3 is disposed near.

[0009]

EXAMPLES The present invention will be described in detail with reference to examples. As shown in the side view of FIG. 1, a roll material 1 is a long paper sheet 1a or a long synthetic resin sheet. The film 1a is wound around a cylindrical winding core 2.

A support shaft portion 3 is mounted in the winding core 2 from both side ends thereof, and the raw roll material 1 is rotatably supported.

The long sheet 1a wound as the roll material 1 is unwound by an in-feed roll 10 (a pair of drive rotating rolls 10a, 10b that press against each other), and a printing machine or a call coater is used. , Sheet laminating machine, etc.

A winding core 2 which is generally used for a roll material 1.
There are two types of the roll raw material 1. The roll raw material 1 has a projecting type in which both side ends 2a of the winding core 2 project from both side surfaces of the roll raw material 1.
There is a flush type with both side edges 2a, 2a of the same plane that do not project from both side surfaces.

In the present invention, the winding core 2 of the roll original fabric 1
Is a protruding type, the metal portion 4 formed by attaching a metal tape such as an aluminum tape to the whole or part of the outer circumference of either or both of the protruding side edges 2a, 2a, or the metal. The metal part 4 formed by applying ink or paint containing powder is applied.

Further, when the core 2 of the roll material 1 is of a flush type, the supporting shaft portion 3 supporting the core 2 is made of, for example, synthetic resin. Partly, the metal part 4 formed by adhering a metal tape such as an aluminum tape, or the metal part 4 formed by applying an ink or paint containing metal powder is used. Is made of metal, the main body of the support shaft portion 3 is used as the metal portion 4.

The rotating roll 5 is rotatable around the outer periphery of the roll material 1, and the bearing portion 6 (or the center of rotation of the support shaft portion 2) at the tip of the arm 8 which swings through a fulcrum 9 is rotated. A support shaft portion 5a parallel to the axial direction of the winding core 2 is provided on a bearing portion 6) which is linearly slidable along a guide (not shown) installed on a line passing therethrough or on a line parallel thereto. It is rotatably supported by the support shaft portion 5a.

One end of a spring 8a is attached to the arm 8 in the middle thereof, and the other end is appropriately attached to a mounting portion 8b of the apparatus main body frame F, and the rotating roll 5 pivotally supported by the arm 8 is , Is urged in the direction of pressing contact with the outer periphery of the roll material 1.

The metal detecting proximity sensor 7 is attached and fixed to the bearing portion 6 supporting the support shaft portion 5a of the rotating roll 5 with its detection direction directed toward the center of rotation of the winding core 2 or the support shaft portion 3. Has been done.

It is appropriate that the nearby sensor 7 has a detectable distance of 10 mm or less.
For example, a high frequency oscillation type near-field sensor for metal detection can be used.

The detectable distance of the high-frequency oscillation type near-field sensor for metal detection is generally within 8 mm to 10 mm, and the roll diameter decreases as the roll material 1 is unwound. If the distance between the rotating roll 5 that rotates around the outer periphery of the roll material 1 and the winding core 2 falls within the detectable distance, the near-field sensor 7 detects the metal portion 4. Based on the detection signal, an alarm or an automatic joining operation of the sheets 1a is started.

FIG. 2 is a front view of an embodiment of the apparatus of the present invention, in which the metal detecting near-field sensor 7 projects outside the bearing portion 6 of the rotating roll 5 and outside the side surface of the roll material 1. The metal portion 4 provided on the side end 2a of the projecting winding core 2 of the roll original fabric 1 can be directly detected.

FIG. 3 is a front view of another embodiment of the apparatus of the present invention, in which the metal detection proximity sensor 7 is located outside the bearing portion 6 of the rotary roll 5 and outside the side surface of the roll material 1. In order to directly detect the metal support shaft portion 3 (the metal support shaft portion such as a taper cone) mounted in the side end 2a of the cylindrical core 2 of the roll material 1 which is provided so as not to protrude. Has become.

The support shaft portion 3 for supporting the winding core 2 of the roll material 1 is supported and attached to the apparatus body frame F. For example, a support body is rotatably supported on the apparatus body frame F by a motor. A shaft 11 is provided, and each rotary two-way arm 12 (or three-way arm) for replenishment, which is attached to and supported by the support shaft 11, is provided at the tip thereof.

When the roll length 1 becomes small while the roll material 1 mounted and supported on the support shaft portion 3 of one arm 12a of the two-way arm 12 is unwound and supplied to the processing machine (the winding diameter is small). In this case), the rotating roll 5 that rotates circumferentially around the outer periphery of the original roll 1 approaches the winding core 2, and the proximity sensor 7 attached to the bearing 6 of the rotating roll 5 causes the winding core 2 to rotate.
The metal portion 4 applied to the is detected.

In response to this detection signal, a motor (not shown) for rotating the support shaft 11 is started, and the two-way arm 12
1 is rotated in the left direction in FIG. 1 through the support shaft 11, and the paster roller 13 is also moved, and finally the long sheet 1a being fed and the support shaft portion of the other arm 12b in advance. While the rotation of the two-way arm 12 is stopped when the outer peripheral surface of the new roll material 1 mounted and supported on the sheet 3 is brought into contact, the long sheet 1a being fed is pressed by the paster roller 13. The sheet is joined with an adhesive tape or the like to perform the sheet joining operation.

[0025]

The roll raw material unwinding residual amount detecting device of the present invention is provided with the rotating roll 5 which comes into pressure contact with the outer periphery of the raw material roll 1, and supports at least one end of the rotary support shaft portion 5a of the rotating roll 5. Since the bearing portion 6 is provided with a metal detection proximity sensor 7 such as a high frequency oscillation type proximity sensor that detects that the metal part 4 is disposed near, the remaining amount of the roll material decreases,
When the winding diameter becomes smaller, a near-side sensor 7 integrally attached to the rotating roll 5 is provided on the entire circumference or partial circumference of the outer circumference of the winding core 2 or the support shaft portion 3 supporting the winding core 2. Even if there is an excess or deficiency in the winding length of the roll stock or the diameter of the winding core is irregular by detecting the metal portion 4 or the metal supporting shaft portion 3, It is possible to stably detect the remaining amount of unrolled raw fabric regardless of the diameter.

[0026]

The unrolled roll unwinding residual amount detecting device of the present invention can properly splice the roll roll even if the roll length of the roll roll is excessive or insufficient or the diameter of the winding core is irregular. It is possible to grasp the timing (timing) of the combined replenishment, and it is possible to prevent the splicing failure and unnecessary loss of the raw material by detecting the proper splicing time.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of an unrolled roll unwinding remaining amount detecting device of the present invention.

FIG. 2 is a front view of an embodiment of the unrolled roll unwinding residual amount detection device of the present invention.

FIG. 3 is a front view of another embodiment of the original roll unwinding remaining amount detecting device of the present invention.

[Explanation of symbols]

1 ... Roll original fabric 1a ... Sheet 2 ... Winding core 2a ... Winding core side end 3 ... Spindle part 4 ... Metal part 5 ... Rotating roll 5a ... Spindle part 6 ... Bearing part 7 ... Proximity sensor 8 ... Arm 8a ... Spring 9 ... Support point 10 ... Infeed roll 11 ... Support shaft 12 ... Rotating two-way arm 13 ... Paster roll F ... Main body frame

Claims (2)

[Claims] 1. A metal part 4 is provided on all or part of the outer circumference of a winding core 2 of a roll raw material 1 or a support shaft portion 3 supporting the winding core 2, and the outer circumference of the roll raw material 1 is pressed and contacted. For detecting metal, such as a high-frequency oscillation type near-position sensor for detecting that the metal part 4 is close to the bearing 6 supporting at least one end of the support shaft 5a of the rotary roll 5. An unrolled roll unwinding remaining amount detecting device characterized in that a nearby sensor 7 is provided. 2. A metal support shaft portion 3 for supporting a winding core 2 of a roll raw material 1, and a rotary roll 5 for pressingly contacting the outer circumference of the roll raw material 1. The support shaft portion of the rotary roll 5 is provided. A roller raw material characterized in that a bearing portion 6 supporting at least one end portion of 5a is provided with a metal detection proximity sensor 7 such as a high-frequency oscillation type proximity sensor for detecting the proximity of the support shaft portion 3. Anti-unwinding remaining amount detection device.