JPS6023057B2 - Continuous paper feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous paper feeding device used in printers and the like.

In particular, the present invention relates to a continuous paper folding device having a mechanism for forming creases on continuous paper. 2. Description of the Related Art Printers that use electrophotography on continuous paper such as roll paper or folded paper to convert line signals into visible images such as characters and figures are well known.

When using roll paper in such devices, conventional methods have been to wind it around a rotating roller, or to cut it into an appropriate size using a cutter or the like and store it. However, in the case of continuous long data, it is often more convenient to fold the data. Furthermore, when folding paper is used, it is well known that conventionally, the central part of the bottom of the storage box is left intact, and the continuous paper that is discharged is automatically folded from the crease by its own weight. However, for example, the folds of continuous paper that pass through pressure and heat rollers, such as those in the heat roller fixing device of electrophotographic printers, contract due to heat and stretch due to pressure, resulting in their own weight. It is extremely difficult to fold it. The present invention improves the above-mentioned drawbacks and provides an apparatus for folding and storing continuous paper by creating creases therein.

The present invention will be explained below according to examples.

FIG. 1 schematically explains an electrophotographic printer to which the present invention is applied, in which 1 is a photosensitive drum having a photoconductive insulating layer on its surface, 2 is a charger, 3 is, for example, a He-Ne laser, and 4 is a photosensitive drum having a photoconductive insulating layer on its surface. A modulator that turns on and off the laser beam according to an image signal, 5 a rotating mirror (scanner) that swings the laser beam from side to side and scans it, 6 a lens that adjusts the spot to a predetermined shape, and 7 for reflection. 8 is a developing device that develops the latent image expressed on the photosensitive drum with resin toner, etc. 9 is a transfer device that transfers the developed image onto paper, etc. 1 is a cleaning device for reusing the drum 11 is folded or rolled continuous paper; 12 is a heat roller that fuses the resin toner image to the paper; 13 is a continuous paper that discharges the continuous paper on which the toner image has been deposited and is a part of the folding device. This is the ejection roller.

Reference numeral 14 denotes a roller that holds the ejected continuous paper between it and the ejection roller 3 to create a crease.

15 is a paper length detection device that detects the leading edge of the continuous paper using a photoelectric detection element, detects a hole provided at the end of the continuous paper, sends the signal to the continuous paper gripping roller 3, and controls the timing of gripping the continuous paper. It is a means.

16 is a container for storing continuous paper.

Figure 2 explains the main parts of the present invention in detail.
is a continuous paper having an image fixed thereon, 14', 14
'' is a discharge roller as a first conveyance means rotating in the direction of the arrow with the continuous paper sandwiched between them, and 13', 13... are second and third discharge rollers that are in contact with and follow the discharge rollers 14', 14'', respectively.
Continuous paper gripping rollers serve as conveyance means, and gripping rollers 3' and 13 are connected to each other by connecting rods 17' and 17'' so that they can move around the center of the river as an axis.

Reference numerals 18' and 18'' are plungers for moving the gripping roller when the paper length detecting means receives this signal.

For example, the plunger 18 is
When ' is operated, the connecting rod 17' rotates, and the gripping roller 13' moves to the position of the gripping roller 13'', that is, to the position where it almost contacts the ejection roller 14'' while keeping the periphery of the ejection roller 4' in pressure contact. At this time, the continuous paper 11 is held between the ejection roller 4' and the gripping roller 3'' in a state where they are almost in contact with each other, but since the conveyance directions of the rollers are opposite to each other, the continuous paper 11 is not forwardly conveyed, so it is not ejected. At this time, the continuous paper conveyed by the rollers 14' and 14'' is held between the discharge roller 14' and the gripping roller 3'', and a crease is formed.Then, the force of the spring 19' pushes the continuous paper to the position of the gripping roller 3'. The layer is folded back.The manner in which folds appear in the continuous paper will be explained in more detail with reference to FIG.

14' and 14'' are discharge rollers, and 13'' is a gripping roller.

When the gripping roller 13'' comes to the position shown in the figure, that is, to the position where it almost touches the discharge roller 4'', the continuous paper initially advances along the circumference of the discharge roller 4'', but the paper does not reach the discharge roller 4''.
Frictional force at position b where the gripping rollers 13'' and 13'' almost contact each other (due to the weak pressure at which the ejection roller 14'' and the gripping roller 13'' almost contact each other in an attempt to transport them in opposite directions) Due to the conveyance force, the continuous paper is actually in a slip state where it is not forward conveyed (frictional resistance) and the conveyance force at the contact position a between the discharge roller 14' and the discharge roller 14'' causes the discharge rollers 14', 14'' and the gripping roller to 13
Discharge rollers 14', 14 at the gap C between the rollers of
The continuous paper that receives the forward conveying force only at `` creates a loop as shown by the broken line. This loop is formed. This loop gradually becomes larger and is in pressure contact with the pressing position d of the discharge roller 4' and the gripping roller 13''. Discharge roller 1 rotating in the forward direction
4' and the gripping roller 3'' to form a fold.Then, the gripping roller 13'' is moved back by the spring, and the continuous paper is separated from between the discharge roller 14' and the gripping roller 3''. Although the above explanation deals with only one direction, it goes without saying that the folds can be made alternately by alternately operating the plungers 18' and 18'' shown in FIG. 2 by the paper length detecting means 15.

The continuous paper feeding device according to the present invention has a configuration in which folds are formed simply by alternately moving the second and third transport means to a pair of first transport means for transporting the continuous paper, Since the holding of the loop portion and the gripping of the loop portion can be carried out by one conveying means, the structure can be extremely simplified.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view of an electrophotographic printer to which the present invention is applied, Fig. 2 is a detailed view showing the main parts of the present invention, and Fig. 3 is an explanatory diagram illustrating how folds appear in continuous paper. be. Turtles 3, 13', 13'' are gripping rollers, 14, 14
', 14'' is a discharge roller, 15 is a detection step, 17', 1
7" is connected. It is a box with two designs.

Claims (1)

[Claims] 1. In a continuous paper feeding device that creases and sends out the continuous paper being conveyed, the continuous paper is held down by a pair of first conveyance means that convey the continuous paper, and one of the first conveyance means. a second conveying means that can move to a fold forming position, which forms a loop part with the first conveying means, and the other of the first conveying means operates to hold the loop part in its mouth; a third conveying means that can be moved to a crease forming position where the loop portion is formed by the first and second conveying means, and the second conveying means and the third conveying means are alternately moved to the crease forming position. A continuous paper feeding device characterized by having a means for feeding the paper.