JPS61124463A - Curling tendency correcting device - Google Patents

Abstract

PURPOSE:To prevent reverse curling due to overcured curling by properly using curling-curing rollers of different diameters depending on the degree of curling in a curling tendency curing device for a roll of paper, etc. CONSTITUTION:When curling tendency is low, a roll of paper 1 which is fed from an inlet side feed roller 2, undergoes curing for curling by a larger- diameter curing roller 5A, and then, is discharged through a conveying passage 7A. When the curing tendency is high, a solenoid 9 which is interlocked with a detector for the amount of curling, operates causing a changeover leaf spring 13 to rotate counterclockwise centering around a fulcrum 11. due to this changeover, the roll of paper 1 which is originally being curled in the downward direction, will advance straight and undergoes curing for curling by means of a small-diameter roller 5B, and then, is discharged through a conveying passage 7B.

Description

Detailed Description of the Invention ■Technical Field The present invention relates to a winding straightening device for roll paper, film, etc., and for example, a winding straightening device that can correct winding curls during conveyance of facsimile recording paper. It is related to.

■Prior Art Conventionally, this type of curl straightening device has been equipped with, for example, an endless belt that rotates from an inlet to an outlet, and a floater that presses against the endless belt. There is a device that corrects curls by passing the paper between an endless belt and a swinger to reverse the warp (see Japanese Patent Publication No. 39550/1983). but.

In the correction of curls with this configuration, the amount of curls is not detected. For this reason, there are problems in that when the roll paper diameter is large, the roll paper becomes curly, and when the roll paper diameter is small, the straightening is insufficient.

Another conventional example includes a means for detecting the presence or absence of curl in the paper and the direction of the curl, and a curl removing means located behind the detecting means and controlled by the detecting means. A device that automatically corrects the curl according to the direction has been proposed (see Japanese Unexamined Patent Publication No. 56-48343). Although it detects curls, it is a copying machine and does not have a curl correction mechanism. Since the rollers are of one type and are provided in both directions, there are problems in that the device is large and the cost is high.

■ Purpose The present invention improves the above-mentioned conventional problems. When correcting curls in roll paper, the method of removing curls is changed depending on whether the curls are large or small. The object of the present invention is to provide a curl correction device that performs fine curl removal to prevent curls or curls due to insufficient curl removal.

■Structure Figure 1 shows the structure of an embodiment of the curl correction device of the present invention, which is installed in the paper conveyance path on the receiving and recording side of a facsimile machine. is the entrance side feed roller, 3 is the exit side feed roller, 4A
, 4B is a guide, 5 is a straightening roller, 6 is a leaf spring,
7A and 7B are conveyance paths, 8 is a switching guide, 9 is a solenoid, 10 is a compression spring, and 11 is a fulcrum.

In this device, when the curl is small, the roll paper 1 is ejected from the entrance side feed roller 2 through the conveyance path 7A and then delivered to the exit side feed roller 3, but when the curl becomes larger than a certain amount, the solenoid 9 is activated. and move the switching guide 8 to the fulcrum 11.
Rotate counterclockwise around .

Since the roll paper 1 is originally curled downward, it passes through the conveyance path 7B, and after the curl is corrected by the curl removal roller 5 and the leaf spring 6, it is discharged. When the compression spring 10 attached to the solenoid 9 is small.

It is used to rotate the switching guide 8 clockwise to form the conveyance path 7A.

FIG. 2 shows an embodiment in which the straightening section of FIG. 1 is partially modified, and its structure and operation are the same as those in FIG. 1 except that an intermediate feed roller 12 is provided.

Figure 3 shows roll paper 1 with weak and strong curls.
An example is shown in which straightening rollers with different diameters are used.

This is because when the curl of the roll paper 1 is small, the curl of the roll paper 1 is removed by the curl removing roller 5A.

The paper is discharged through the conveyance path 7A. At this time, since the straightening roller 5A has a larger diameter than the straightening roller 5B,
You can only get rid of your curls weakly.

When the curl becomes larger than a certain amount, the solenoid 9 is activated to rotate the switching plate spring 13 to the left about the fulcrum 11. Since the roll paper is originally curled downward, it travels straight, is smoothed by a small diameter straightening roller 5B, and is discharged through a conveyance path 7B.

FIG. 4 is a diagram showing another embodiment of the present invention in which two stages of straightening sections are provided depending on the size of the curl of the roll paper 1.

In this device, when the curl of the roll paper 1 is small, the curl is removed by the curl removal roller 5A, and the paper is discharged through the conveyance path 7A.

When the curl of the roll paper becomes larger than a certain amount, the solenoid 9 is activated to rotate the switching guide 8 to the left about the fulcrum 11.

Since the curls of the rolled paper were not sufficiently removed by the curl removal roller 5A, the downward curl remained and the roll paper was moved straight ahead, and the curl was removed by the curl removal roller 5B.

The paper is discharged through the conveyance path 7B.

This two-stage straightening concept can also be applied to the method shown in FIG.

Further, it is also possible to combine FIG. 3 and FIG. 4, for example, by changing the diameters of the straightening rollers 5A and 5B.

In addition, in each of the above figures, the switching guide 8 and the switching leaf spring 1
3 indicated by a dashed line represents the case where 1 a normal conveyance path, that is, a conveyance path 7A is formed.

Further, in FIGS. 2 and 3, the switching guide or the leaf spring and the switching leaf spring may be formed in a comb-teeth shape in the conveyance direction.

(2) Effects As explained above, since the present invention detects the amount of curl in the roll paper and corrects the curl, it is possible to avoid over-straightening and achieve fine-grained straightening.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of an embodiment of the curl correction device of the present invention, FIG. 2 is a diagram showing an embodiment in which the curl removing part of FIG. FIG. 4 shows another embodiment of the present invention in which straightening rollers with different diameters are used depending on whether the roll paper 1 has a weak curl or a strong curl. FIG. It is a figure which shows an example. 1... Roll paper, 2... Inlet side feed roller, 3... Outlet side feed roller, 4A, 4B... Guide, 5, 5A, 5B... Straightening roller, 6, 6' ... Leaf spring, 7A, 7B... Conveyance path,
8...Switching guide. 9... Solenoid, 10... Compression spring, 11...
-Fully point, 1z...intermediate feed roller, 13...switching leaf spring. Figure 1

Claims (3)

[Claims] (1) A feed roller that feeds the roll paper, a plurality of different transmission paths that transmit the fed roll paper, a guide for configuring the plurality of transmission paths, and one or more straightening parts, A curling device comprising: a switching means for guiding a roll of paper to one of a plurality of transmission paths; and a curling section for removing the curl of the rolled paper guided by at least one transmission path. Orthodontic device. (2) The switching means switches to guide the roll paper to any one of the plurality of transport paths depending on the curling amount of the roll paper. The curl correction device described in (1). (3) A winding straightening section according to claim (1), wherein the straightening section to be used in the plurality of straightening sections can be changed by a switching means according to the winding curling amount. Orthodontic device.