JP2000016655A - Winding device carrier passage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent flutter in a prescribed position in a winding device by moving two rolls arranged in the front/rear in the direction for flowing a sheet, while holding its parallel state about a fulcrum. SOLUTION: Two rolls 101, 102 are arranged parallel in the front/rear in a flow direction and connected with each other by a bearing part. The connecting part is called an arm 104. A fulcrum 105 is provided in the central part of the arm 104. The two rolls 101, 102 can move about the fulcrum 105 so that, for example, when a force is applied on just one roll 101, the force is transmitted to the other roll 102 through the arm 104 so that the force is balanced by the both rolls 101, 102. The arm 104 is supported by a damping system such as a damper and a spring so as to suppress the reaction and quickly converge the swinging, when the balance of the force is lost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to plastics, paper,
The present invention relates to a conveying path of a device for winding a continuous sheet made of metal.

[0002]

2. Description of the Related Art Conventionally, photometry of surface light is sometimes performed for the purpose of inspecting the surface of a sheet in a winding device. in this case,
In many cases, an image is taken from a direction perpendicular to the roll contact surface using an optical element represented by a CCD camera or a line sensor camera.

[0003] At this time, a method of arranging two rolls at a short interval to prevent the sheet from fluttering due to the vibration of the sheet in the vertical direction with respect to the roll contact surface, or a sheet entering and leaving the winding and conveying system There is an angle method.

[0004]

However, CCDs
When an image is captured by an optical element typified by a camera or a line sensor camera, if the image flutters beyond the depth of focus, the image is blurred and the measurement becomes difficult.

[0005] Further, even if a method of suppressing the fluttering by reducing the slack of the sheet by shortening the roll interval, it is difficult to suppress the fluttering which is considered to be caused by the tension fluctuation of the winding system.

[0006] The present invention has been made in view of such a conventional problem, and has as its object to suppress fluttering at a predetermined position in a winding device. In particular, in the present invention, it is assumed that an optical element is arranged on a winding device, and an object of the present invention is to maintain a constant distance between the sheet and the optical element at that position.

[0007]

The cause of the fluttering of the sheet flowing on the winding device is that the movement of the sheet is caused by the fluctuation of the winding speed, the fluctuation of the resistance on the unwinding side, or the rotational moment of the roll rotated by the movement of the sheet. It can be out of sync with the quantity.

In the present invention, when two roll systems arranged in front and rear parallel to the flow direction are used, the two roll systems are used in consideration of the fluctuation of the winding speed and the fluctuation of the resistance on the unwinding side. A mechanism is provided to keep the force acting on the two rolls the same when the sheet existing between the rolls sags or pulls due to sagging or pulling. By keeping this force constant, fluttering between the two rolls can be suppressed. The two rolls are arranged in front of and behind the flow direction and parallel to each other, and are connected by a bearing or the like. This connecting portion is hereinafter referred to as an arm. A fulcrum is provided at the center of the arm. The two rolls can move around this fulcrum. If a force is applied to only one roll, the force is transmitted to the other roll through the arm, and the balance between the forces is achieved by both rolls. Take. The diameters of the two rolls may not be the same by adjusting the position of the fulcrum. Further, by supporting the arm with a damping system composed of a damper, a spring, etc., it is possible to suppress the recoil, and to quickly converge the swing when the balance of the force is lost.

When two rolls are connected, if the balance of the forces is lost, the sheet is tilted with respect to the optical axis of the optical element, and an angle is generated between the vertical direction of the sheet and the optical axis. It becomes impossible to image from the direction. Therefore, the optical axis is deflected by using a prism, and an image can always be taken from the vertical direction of the sheet while an image pickup device such as a CCD camera is fixed.

According to a first aspect of the present invention, in a sheet winding device made of plastic, paper, or metal, two rolls disposed in front and rear with respect to a direction in which the sheet flows are provided at one fulcrum. The winding device transport path is characterized in that the winding device is movable while maintaining a parallel state with respect to the center.

According to a second aspect of the present invention, there is provided the winding device transport path according to the first aspect, further comprising a damping system including a damper and a spring.

According to a third aspect of the present invention, there is provided an imaging optical system for inspection and measurement, and a variable prism having a function of deflecting an optical axis of the optical system. A winding device transport path according to claim 1 or claim 2.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the configuration of a transport path according to the first aspect of the present invention. Roll 101 and Roll 102
Are arranged in front and rear parallel to the flow direction, and are connected by an arm 104. The sheet 103 flows from 101 to 102. A fulcrum 105 is provided near the center of the arm 104, and 101, 102, and 104 are fixed at 105 to the device base.

FIG. 2 shows the configuration of a transport path according to a second aspect of the present invention. The roll 201 and the roll 202 are arranged in front and rear parallel to the flow direction.
Are connected by Sheet 203 flows from 201 to 202. The arm has dampers 206, 207 and springs 208, 209.
The damping system composed of 7 and 209 has rotational freedom,
It is fixed to the device base. Further, a fulcrum 205 is provided near the center of the arm 204, and the fulcrum 205
At 5 it is fixed to the device base.

FIG. 3 schematically shows a transport path according to a third aspect of the present invention. Reference numeral 301 denotes a sheet, and 302 denotes an image sensor. When the balance between the forces applied to the two rolls is lost, the sheet 301 is tilted, so that it becomes impossible to perform imaging from the sheet vertical direction. Therefore, a variable prism 303 is provided between the sheet and the image sensor to deflect the optical axis by refraction. Thereby, even when the 301 is tilted, imaging from the vertical direction can be performed.

The variable prism 303 includes glass plates 310 and 3
11, a wall 312 made of rubber or the like surrounding the glass plate, and alcohols 313 filled inside. The material to be filled and the outer glass plate are selected from materials having almost the same refractive index so that refraction at this interface does not occur. Sheet side glass plate 31
1 is fixed horizontally, and the glass plate 310 on the image sensor side is fixed.
Is tilted according to the tilt of the sheet to provide a deflection function. Since the tilt angle of the glass plate 610 for guiding light to the image sensor is uniquely determined by the tilt angle of the sheet, the roll connecting arm 604 is connected to the mechanical mechanism such as an arm and a cam, or the electrical mechanism such as a sensor and an actuator. The glass plate 610 is linked.

When light is deflected by this prism, the optical path length changes depending on the tilt angle. This can be solved by changing the ratio of the path through which the light passes through the air and the path through which the light passes through the prism by changing the inclination angle because the refractive index is different between the air and the prism. Actually, it can be realized by designing the position of the rotation center when the glass plate 310 on the prism upper surface is inclined and the position of the rotation center when the sheet is inclined in consideration of the ratio of the above-described distance.

According to the conveyance path of the present invention, the sheet flowing on the winding device can be prevented from fluttering at a predetermined position.
Optical measurement and image measurement at this position can be performed with high accuracy. In addition, not only measurement but also processing using light such as exposure can be performed.

FIG. 4 shows a first embodiment of the transport path according to the present invention. 400 shows a steady state. When a force is temporarily applied to the roll 401 from the sheet 403, this force is transmitted to the other roll 402 via the arm, and pushes the 403, as shown at 410. Thereafter, when the force applied to 401 is released, 403 presses 402 and 4
Return to state 00.

When an image is picked up by the CCD camera 404, the flapping of the 403 is suppressed by the mechanism according to the present invention, so that a good image can be obtained.

FIG. 5 shows a second embodiment of the transport path according to the present invention. In the first embodiment, since the point viewed by the CCD camera and the fulcrum that is the center of the movement are shifted, the distance is not strictly kept constant. If the magnification of the objective lens is increased, the depth of focus becomes shallower.
The configuration shown in FIG.

In the configuration of 500, the fulcrum 501 is
It is at the same height as 03. For this reason, the CCD camera 502
503 is equal to the distance between 502 and 501. As a result, an in-focus image can always be obtained even when a lens having a small depth of focus is used.

FIG. 6 shows the operation of the variable prism according to the third aspect of the present invention. 600 indicates a steady state. In the steady state, since the optical axis is perpendicular to the sheet 601, no refraction occurs in the prism portion, and the optical axis from the sheet to the image sensor is 1
It becomes a straight line of a book.

When the sheet is tilted to the right as in 610, the glass plate 603 is tilted to the right. Then, the optical axis perpendicular to the sheet is refracted by the glass plates 604 and 603, and coincides with the optical axis of the image sensor 602. Similarly, when the sheet is tilted to the lower right, the glass plate 603 is tilted to the lower right.

At this time, the distance from the sheet to the glass plate 604, the distance from the glass plate 604 to the glass plate 603,
The distance from the glass plate 603 to the image sensor changes. The distance from the sheet to the glass plate 604 can be adjusted by changing the position of the center of rotation when the sheet is inclined. The distance between the glass plate 604 and the glass plate 603 and the distance between the glass plate 603 and the image sensor can be adjusted by changing the position of the center of rotation when the glass plate 603 is tilted. Here, when light travels through a medium having a high refractive index, the optical path length is adjusted using the fact that the optical path length is longer than the actual distance.

For example, as shown in Embodiment 2, when the distance between the optical element and the sheet does not change, if the sheet is deflected using a variable prism, the more the sheet is inclined, the more the glass plate 60 is tilted.
The distance from 4 to the seat is reduced. Therefore, by bringing the center of rotation when tilting the glass plate 603 between the glass plates 603 and 604, the more the glass plate 603 is tilted, the longer the optical axis distance that passes through the prism. Accordingly, the optical path length in the prism section is increased, and the entire optical path length does not change.

[0027]

According to the conveying path of the present invention, the flutter of the sheet at a predetermined position in the winding device can be suppressed. In addition, it becomes possible to perform optical measurement and image measurement using a magnifying optical system, which has been difficult due to fluttering. As a result, in-line inspection and in-line processing of the winding system can be performed.

[Brief description of the drawings]

FIG. 1 is a schematic view of a transport path according to the first aspect of the present invention.

FIG. 2 is a schematic view of a transport path according to a second aspect of the present invention.

FIG. 3 is a schematic view of a transport path according to a third embodiment of the present invention.

FIG. 4 is a diagram illustrating a conveyance path, a sheet, and a sheet according to the first embodiment of the present invention.
FIG. 4 is a schematic diagram illustrating a positional relationship of a CCD camera and an operation when a force is applied to a sheet from a sheet on the conveyance path.

FIG. 5 illustrates a conveyance path, a sheet, and a sheet according to a second embodiment of the invention.
FIG. 3 is a schematic diagram illustrating a positional relationship of a CCD camera.

FIG. 6 is a schematic diagram illustrating an operation of a variable prism according to a third embodiment of the present invention.

[Explanation of symbols]

101: Roll 102: Roll 103: Sheet 1
04 ... arm 105 ... fulcrum 201 ... roll 202 ... roll 203 ... sheet 2
04 ... arm 205 ... fulcrum 206 ... damper 207 ... damper
208: Spring 209: Spring 301: Sheet 302: Image sensor 303: Variable prism 304: Arm 310: Glass plate 311: Glass plate 312: Rubber wall 313: Alcohol 400: Transport path, sheet, and camera in a steady state Positional relationship 401 ... Roll 402 ... Roll 403 ... Sheet 404 ... CCD camera 410 ... Position relationship between the conveyance path, sheet and camera when a force is applied to one of the rolls 501 ... Support point 502 ... CCD camera 503 ... Sheet 600 ... Steady state 601: Sheet 602: CCD camera 603: Variable prism upper glass plate 604: Variable prism lower glass plate 610: When the sheet is inclined

Claims (3)

[Claims] In a sheet winding device made of plastic, paper, and metal, two rolls arranged before and after with respect to a direction in which a sheet flows are movable while maintaining a parallel state about one fulcrum. A take-up device transport path, characterized in that: 2. The winding device conveying path according to claim 1, further comprising a damping system including a damper, a spring, and the like. 3. The winding device according to claim 1, further comprising an imaging optical system for inspection and measurement, and a variable prism having a function of deflecting an optical axis of the optical system. Conveyance path.