JPH05124758A - Web meandering correcting device - Google Patents

Abstract

PURPOSE:To correct meandering in a condition that curls generated on both edges of a web are removed. CONSTITUTION:Two rollers 34 and 35 to convey a support body 10 are arranged on a freely movable support stand 31 at an interval equal to or smaller than 300mm. Since a meandering quantity detector 17 to detect the width directional positional dislocation in the edge part of the support body 10 being coveyed in a predetermined reference position is provided between these rollers 34 and 35, a control section 20 can correct meandering of a web properly by moving the support stand 31 according to accurate information obtained from the meandering quantity detector 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a meandering correcting device for correcting meandering of a web.

[0002]

2. Description of the Related Art Generally, when a web is conveyed, meandering occurs regardless of the material of the web. For example, in the process of manufacturing a photosensitive material shown in FIG. 11, when a backing layer such as an antihalation layer or a photosensitive layer is meandered on the back surface or the front surface of the transported support body 10, when the support body 10 meanders, quality performance is improved. May decrease. Step 1 of applying the photosensitive layer in particular
In step 2, since it is necessary to correct the meandering of the support 10 accurately, the meandering correction step 14 is provided after the back layer coating and drying steps 11 and 13, and the support 1 in the photosensitive layer coating step 12 is provided.
Prevents 0 meandering.

The meandering correcting step 14 is provided with a meandering correcting device 16 as shown in FIG. Meandering correction device 1
Reference numeral 6 includes a meandering amount detector 17, a support 18, a drive unit (motor) 19, a control unit 20, and the like. In addition,
The drive unit 19 can use a mechanism such as electric, hydraulic, pneumatic, etc., in addition to the motor. The support base 18 is provided with two transport rollers 22 and 23 at right angles to the transport direction of the support body 10, and is rotatable about a shaft 25 provided on the center of the transport direction. .. The meandering amount detector 17 has a horseshoe-shaped detecting portion 17a, and is arranged so as to sandwich the edge portion of the support body 10 on the downstream side of the two conveying rollers 22 and 23. As shown in FIG. 13, the detection unit 17a
Includes a light emitting element 17b such as an LED and a photodiode array 17c on the opposite side thereof.
The photodiode array 17c receives the light emitted from the light emitting element 17b, and outputs the change in the amount of light. This change in the amount of light is detected by the meandering amount detection circuit 27 in the control unit 20.
And the meandering amount detection circuit 27 sends the information to the control circuit 28. Based on the obtained information, the control circuit 28 drives the operation unit 19 via the driver 19a to rotate the support base 18 by a predetermined amount, and corrects the meandering of the support body 10.

[0004]

However, when the support is coated, curls occur on both edges of the support.
FIG. 13 shows a state in which one end of the support 10 after applying the back layer passes through the meandering amount detector 17. In this state, curls are generated at both ends of the support 10, and the support 10 after applying the back layer is applied to one end position of the support 10 when conveyed in an uncoated state.
Curl is generated at one end of the
It is narrowed by the size of "1". If the meandering correction is performed in this state, the support 10 detected by the meandering amount detector 17 is detected.
There was a drawback that the meandering could not be corrected correctly because one end of the was curled up.

The curl becomes apparent between the transport rollers arranged at intervals of 500 mm or more. Although it depends on the tension condition, the curl amount increases as the roller span increases. If the position of one end of the support 10 at the position of the meandering detector 17 is curled, the dimension "e1" shown in FIG.
When the meandering correction of the support 10 is performed in a state where the width is narrowed by 30 mm, the support 10a when conveyed in an uncoated state on the coating roller 12a in the photosensitive layer coating step 12 shown in FIG.
The deviation “h” from the one end position of 30 becomes 30 mm.

The present invention has been made in consideration of the above-mentioned problems of the prior art, and it is an object of the present invention to provide a meandering correction device for a web in which the meandering correction is performed in a state where curls generated at both ends of the web are removed. To aim.

[0007]

In order to solve the above-mentioned problems, the web meandering correction device of the present invention comprises a detecting means for detecting the end position of the web being conveyed and a web conveying path. In a meandering correction device for a web having an end position correction means that moves in the web width direction, the detection means comprises:
Positioned between the two parallel transport rollers, the interval between the two parallel transport rollers is 300 mm or less along the web transport direction, and the two parallel transport rollers are parallel to the detection means. At least one of the application rollers is attached to a rotating or translating support table that constitutes the end position correcting means.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1 showing a meandering correction device 30 according to a first embodiment, the same members as those described in the prior art are designated by the same reference numerals. Reference numerals 33, 34 and 35 shown in FIG.
It is a conveyance roller that conveys the support 10. Conveyor roller 3
3, 34 and 35 are rotatably fixed to the support base 31. The meandering amount detector 17 is provided between the transport rollers 34 and 35. These transport rollers 34, 35 are
The supports 10 are arranged in parallel at intervals of 300 mm or less along the transport direction of the support 10. As a result, it is possible to suppress curl generated at both ends in the width direction of the support body 10 conveyed at the position of the meandering detector 17. The transport rollers 34, 3
The interval of 5 is preferably 200 mm or less, more preferably 150 mm or less.

When the support 10 having a thickness of 122 μm and a material of cellulose triacetate (TAC) is conveyed between the above-mentioned conveying rollers 34 and 35 under the condition of a tension of 10 kgf / m, FIG. The dimension "eh" shown is about 5 m
It was suppressed to m or less, and "e1" could be suppressed within about 0 to 1 mm. As a result, the meandering amount is accurately measured by the controller 28 via the meandering amount detector 17, and the meandering of the support 10 can be corrected accurately. As a result, on the coating roller 12a shown in FIG. 14, the deviation in the width direction with respect to the position of one end of the support 10a when transported in the uncoated state could be suppressed to about 1 mm or less.

Further, compared with the meandering correction device 14 described in the prior art, since the number of transport rollers is increased, a slip in the width direction that occurs between the support 10 and the transport roller when the meandering correction operation is performed. Can be reduced, and there is no fear of causing scratches or the like on the front and back surfaces of the support 10.

Further, the meandering correction device 30 described above has the first
The arrangement is not limited to that described in the embodiments, and may be arranged as needed in addition to the coating process described in the related art. Therefore, as the meandering correction device 30, for example, the number and arrangement of the conveyance rollers, the position of the shaft 25 serving as the rotation center of the support 31 and the conveyance of the web can be flexibly arranged in various processes. 2nd, 3rd, 4th, 5th, 6th, 7th and 8th embodiments which are adapted to directions and the like are shown in FIGS. FIGS. 1 to 7 show an example in which two parallel conveying rollers 34 and 35 are attached to the support base 31, and the meandering amount detector 17 is fixed independently of the support base 31, and FIG. Meandering amount detector 1
7 and the rollers 34 and 35 are both attached to the support base 31.

In a ninth embodiment shown in FIG. 9, the meandering correction device 30 described above is provided with a support feeding device.
The support feeding device is composed of a base 40, a supply reel 41 around which the support 10 is wound, and the above-mentioned support base 31. Two parallel conveying rollers 34 and 35 are attached to the base 40, and the meandering amount detector 17 is mounted on the base 4
It is fixed independently from 0. Further, the supply reel 41 and the support base 31 are fixed on the base 40.
The meandering correction of the support 10 is performed by the base 40 with respect to the ground 42.
It can be performed immediately after it is sent out by sliding and moving in the width direction of the support 10.

In the tenth embodiment shown in FIG. 10, the meandering correction device 30 described above is provided with a support winding device. The support take-up device includes a base 50, a take-up reel 51 for winding the support 10, and the support base 3 described above.
1 and 1. The meandering amount detector 17 is a base 5
The two rollers 34 and 35, which are attached to 0 and are arranged in front of and behind the meandering amount detector 17, are fixed independently of the base 50. Further, the take-up reel 51 and the support base 31 are fixed on the base 50. The meandering correction of the support 10 can be performed by sliding the base 50 in the width direction of the support 10 with respect to the ground 52. As a result, the support 10 is wound on the take-up reel 51 with both ends in the width direction aligned.

In the embodiment described above, the light emitting element 17b is used.
Although the photodiode array 17c receives the light emitted from the photodiode array 17 and outputs the change in the amount of light, the meandering amount detector 17 is provided. However, the present invention is not limited to this. Alternatively, a meandering amount detector using a mechanism such as a pneumatic type, an ultrasonic type, or a contact type may be used. Further, in each of the embodiments, the target web is used as the support for the photosensitive material, but the web according to the present invention is not limited to this, and may be formed of a material such as plastic, paper, and metal.

[0015]

As described above, according to the web meandering correction apparatus of the present invention, the distance between at least two rollers for conveying the web is set to 300 mm or less, and the web conveyed between these rollers is arranged. Since the detection means for detecting the positional deviation of the end portion in the width direction of the web is provided, it is possible to suppress the curl generated at both ends in the width direction of the web at the position of the detection means, and accurately correct the meandering of the web. It becomes possible to do it.

[Brief description of drawings]

FIG. 1 is a perspective view showing a web meandering correction device according to a first embodiment.

FIG. 2 is an explanatory view showing a web meandering correction device of a second embodiment.

FIG. 3 is an explanatory view showing a web meandering correction device of a third embodiment.

FIG. 4 is an explanatory view showing a meandering correction device for a web according to a fourth embodiment.

FIG. 5 is an explanatory view showing a meandering correction device for a web according to a fifth embodiment.

6A is an explanatory view of a web meandering correction device of a sixth embodiment as seen from a side surface, and FIG. 6B is an explanatory view as seen from a plane.

FIG. 7 is an explanatory view showing a web meandering correcting device of a seventh embodiment.

FIG. 8 is an explanatory view showing a meandering correction device for a web according to an eighth embodiment.

FIG. 9 is an explanatory view showing a meandering correction device for a web according to a ninth embodiment.

FIG. 10 is an explanatory diagram showing a meandering correction device for a web according to a tenth embodiment.

FIG. 11 is an explanatory diagram showing a main part of a process of manufacturing a photosensitive material described in the related art.

FIG. 12 is a perspective view showing a web meandering correction device described in the related art.

FIG. 13 is an explanatory diagram showing the meandering amount detector described in the related art.

FIG. 14 is an explanatory diagram showing a main part of a photosensitive layer coating step described in the related art.

[Explanation of symbols]

 10 Support 16,30 Meandering Correction Device 17 Meandering Detector 18,31 Support 22,23,34,35 Conveyor Roller 41 Supply Reel 51 Winding Reel

Claims (1)

[Claims] 1. A web meandering correcting device having a detecting means for detecting an end position of a web being conveyed and an end position correcting means for moving a web conveying path in a web width direction, wherein the detecting means is , Located between two parallel conveying rollers, and the distance between the two parallel conveying rollers is
The length is 300 mm or less along the web transport direction, and at least one of the two transport rollers parallel to the detection means is attached to a rotating or translating support base that constitutes the end position correcting means. A web meandering correction device characterized by being present.