JPS623730B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for supplying sheets of rolled electrostatic recording paper used in copying machines, facsimile machines, etc., and an apparatus for carrying out the method.

FIG. 1 is a schematic diagram of a conventional electrostatic recording method such as a copying machine and a facsimile machine, and an apparatus for implementing the same.
2 is a roll paper feed roller, 3 and 6 are roll paper feeding drive rollers, 4 is a rear roller, and 5 is a stylus. This stylus 5 forms a latent image on electrostatic recording paper. 7 is a cutter for cutting the roll paper into a predetermined size, 8 and 11 are recording paper feed drive rollers, 9 is a switch for switching between normal feeding of recording paper and removal of unnecessary recording paper pieces, and 10 is a cutter for cutting the roll paper into a predetermined size. Unnecessary recording receiving member, 12 is a developing device, 1
3 is a fan, 14 is a fixing device, and 15 is a tray.

Conventionally, there have been two methods for supplying recording paper in electrostatic recording methods and devices for implementing the same, such as copying machines and facsimile machines:
There is a method of feeding roll paper. The latter method of supplying roll paper and its implementation device include, for example, the first
The one shown in the figure is often used.

However, roll paper has curls (hereinafter referred to as "curls"), so especially when the roll diameter becomes small, jams occur more frequently in the device and the resulting copies become curled. It was hot.

Therefore, devices equipped with various curl removal means have been proposed, but all of them always use a fixed curl removal means regardless of the curl condition, and they still have problems such as curls remaining on the paper surface. Ta. In addition, it has been considered to provide a curl removing means depending on the curl state, but for example, devices such as detecting the curl state of the roll paper, detecting the diameter of the roll paper, and paper tensioning are required. There were problems such as overall complexity, larger size, and increased costs.

An object of the present invention is to solve the above-mentioned problem and provide a roll paper supply method and an apparatus for carrying out the same, which remove curls peculiar to roll paper (hereinafter referred to as "decurling") according to the curl state. There is a particular thing.

The present invention has been made to achieve the above object, and includes a step of unwinding a rolled sheet;
The present invention provides a method for supplying a rolled sheet, and an apparatus for carrying out the same, characterized in that the method comprises a step of feeding the rolled sheet while bringing the outer surface of the rolled sheet into contact with the outer surface of the sheet being fed out.

Hereinafter, the present invention will be explained in detail with reference to Examples.
In addition, in all the figures, parts having the same function are given the same symbols.

FIGS. 2 and 3 are explanatory diagrams of an embodiment of the method of the present invention and an apparatus for implementing the same, and the portions related to the roll paper supply section in the electrostatic recording method of a copying machine, facsimile machine, etc. shown in FIG. Only the following are listed.

FIG. 2 is a diagram showing the recording paper being fed out when the diameter of the roll paper 1 is still large, and FIG. 3 is a diagram showing the recording paper being fed out when the diameter of the roll paper 1 is becoming small.

In the figure, 16 is a curl removal roller;
The recording paper fed out from the roll paper 1 passes through the curl removing roller 16, passes through the feeding roller 2 while contacting the outer peripheral surface of the roll paper 1 again, and is supplied to a predetermined recording section. .

In this embodiment, as shown in FIGS. 2 and 3, the paper passing position changes, but in either case, the paper is fed out in contact with the outer peripheral surface of the roll paper. Further, by applying a braking action to the roll paper 1, the curl of the recording paper is removed.

FIGS. 4 and 5 are explanatory views of other embodiments of the method of the present invention and the apparatus for carrying out the method, and, like FIG. 2, only the part related to the roll paper supply unit is shown. It is. FIG. 4 is a diagram showing the recording paper feeding state when the diameter of the roll paper 1 is still large, and FIG. 5 is a diagram showing the recording paper feeding state when the diameter of the roll paper 1 is small.

As shown in FIGS. 4 and 5, this embodiment differs from the structure of the embodiment in FIG. 2 in that the curl removal roller 16 is mounted movably depending on the diameter of the roll paper 1. It's different.

In this embodiment, the curl removal roller 16 is arranged so that the recording paper is always in contact with the outer circumference of the roll paper 1 at a substantially constant ratio (for example, 1/2) of the outer diameter of the roll paper 1.
In order to move the roll paper 1, the paper passing position, that is,
No matter what state of curl the roll paper 1 is in, appropriate decurling can be performed depending on the state of the curl.

In the case of a normal roll paper 1, the curl removing roller 16 is moved linearly with respect to the moving distance L.

FIGS. 6 and 7 are explanatory views of other embodiments of the method and apparatus for carrying out the method of the present invention, and, like FIG. 2, only the portions relating to the roll paper supply section are shown.

FIG. 6 is a diagram showing the state of recording paper feeding out when the diameter of the roll paper 1 is large, and FIG. 7 is a diagram showing the state of feeding out the recording paper when the diameter of the roll paper 1 is small.

As shown in FIGS. 6 and 7, this embodiment is similar to the embodiment shown in FIGS. 2 and 4 in that a curl removing roller 16 is attached to the outer periphery of the roll paper so as to be movable in the direction of the arrow. The composition is different from that of

In this embodiment, the paper passing position can be changed according to the diameter of the roll paper 1, so it is possible to perform a more appropriate decal than in the embodiment shown in FIG. 4, and the structure is simpler. be.

In each of the embodiments described above, the control circuit for the entire system of the roll paper supply device may be a conventional one, so the configuration and explanation thereof are omitted here.

Furthermore, in each of the above embodiments, a method for supplying rolled paper such as a copying machine, a facsimile machine, etc., and an apparatus for implementing the same have been described, but any method for supplying rolled sheets in various fields may be used without changing the gist of the invention of the present application. Needless to say, the present invention can also be applied to devices for implementing the same.

As explained above, according to the invention of the present application,
It uses the curvature of the roll paper to perform decaling with a simple configuration, and since it performs decaling according to the curvature, it is inexpensive and suitable regardless of the state of the curvature of the roll paper. It is possible to perform decurling. Furthermore, there is no need for a brake mechanism for roll paper, which has conventionally been commonly used, and even if such a brake mechanism is required, it can be an extremely simple mechanism.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a conventional electrostatic recording method such as a copying machine or a facsimile machine and an apparatus for implementing the same, and FIGS. 2 to 7 are explanatory diagrams of embodiments of the invention of the present application. 1... Roll paper, 2... Roll paper feed roller, 3... Roll paper feed drive roller, 16... Curl removal roller.

Claims (1)

[Scope of Claims] 1. A rolled sheet comprising the steps of: unwinding the rolled sheet; and unwinding the rolled sheet while the outer surface of the rolled sheet is in contact with the outer surface of the sheet being fed out. Supply method. 2. A roll sheet unwinding drive mechanism and a curl removing roller, the curl removing roller being set at a position such that the outer surface of the rolled sheet is in contact with the outer surface of the fed sheet and the sheet is fed out. A rolled sheet feeding device characterized by being provided with. 3. A second method characterized in that the curl removing roller is movably disposed so that the sheet is brought into contact with an approximately constant percentage of the outer periphery of the rolled sheet.
Rolled sheet feeding device as described in 2. 4. A roll-wound sheet unwinding drive mechanism and a curl removing roller, which can be set so that the roll-wound sheet is unwound while the outer surface of the roll-wound sheet is in contact with the outer surface of the unwound sheet, and the roll-wound sheet is A rolled sheet supply device characterized in that the curl removing roller is disposed so as to be in constant contact with the outer peripheral surface of the sheet.