JPH0230865B2 - YOSHIHANSOSOCHI - Google Patents

Description

Detailed Description of the Invention (A) Technical Field of the Invention The present invention provides a paper transport device suitable for use in a device that automatically transports continuous folded paper from a paper supply unit to a paper storage unit via a printing unit. Regarding.

(B) Background of the Technology In recent years, as electronic computers have become faster, output devices such as line printers have been intensively researched and developed to increase speed and improve operability.

(c) Prior Art and Problems FIG. 1 is a diagram for explaining a conventional paper feeding device.

In the figure, first, a latent image is formed on the photosensitive drum 1 by the latent image forming means 2. Next, the developing means 3 supplies developer powder to visualize the latent image formed on the photosensitive drum 1. Next, the visible image on the photosensitive drum 1 is transferred onto the paper 5 by the transfer means 4. After the transfer, developer powder remaining on the photosensitive drum 1 is removed by a cleaning brush 6.

On the other hand, the paper 5 is sequentially pulled out from the hopper 12, passes over a paper guide 13 and a paper presser 14, and is conveyed to the transfer means 4 via the tractor 7 and paper guides 16 and 18. At this time, the transport speed of the paper 5 is preset to the same speed as the surface speed of the photosensitive drum 1. Then, the visible image formed on the photosensitive drum 1 is transferred onto the paper 5 by the transfer means 4. Next, the sheet passes through paper guides 17 and 19, is sent to a tractor 8 and a heat fixing device 9, and after being heated and fixed, is sent to a folding machine 11 and folded.

By performing the steps explained above,
Paper is printed and transported.

However, before such printing is performed, the paper 5 must be loaded into the paper transport path from the hopper 12 to the folding machine 11 via the transfer means 4.

The loading of the paper 5 onto the paper transport path will be described. Note that the paper presser stand 14 is rotatably provided around a shaft 15, and is pressed against the paper conveyance surface of the tractor 7 by a spring or the like (not shown).

The paper holding table 14 thus constructed is first supported horizontally, and the paper transport hole at the leading end of the paper is placed and fixed at a position corresponding to the transport protrusion of the tractor 7. Next, the paper presser table 14 is rotated about the shaft 15, and the paper 5 that has been fixed is released after the paper transport hole is engaged with the transport protrusion of the tractor 7.
By performing the operations described above, the paper 5 is loaded into the tractor 7.

Thereafter, the tractors 7 and 8 are driven by pressing a paper loading switch on an operator panel (not shown).

The paper 5 loaded on the tractor 7 is pushed between the transfer guide 18 and the outer guide 16 by driving the tractors 7 and 8, passes through the transfer means 4, and after passing through the transfer means 4, is transferred to the transfer guide 1.
9 and the outer guide 17, and reach the tractor 8.

Next, the paper 5 is engaged with a transporting protrusion of the tractor 8 and is transported to the heat fixing device 9.

After that, the paper 5 is sent to the drawing roller 10,
The folding machine 11 is reached. Although the paper 5 is loaded by performing the operations described above, it has the following disadvantages. In other words, the paper 5 is stored in the hopper 12 in an orderly folded state. For this reason, when the paper is folded during paper transport, the folded portion gets caught near the entrance of the heating fuser 9 and inside the heating fuser, resulting in frequent paper jams and poor operability. It was hot.

(D) Object of the Invention In view of the above-mentioned drawbacks, an object of the present invention is to provide a paper conveying device that can prevent the occurrence of paper jams near the entrance of a heating fuser and inside it, and that can improve the operability of paper loading. There is a particular thing.

(E) Structure of the Invention According to the present invention, it is an object of the present invention to provide an automatic paper loading means for automatically loading continuous folded paper from a paper supply section to a paper storage section via a printing section, and a method for transporting the continuous folded paper. a stepped roller provided in the path; a flat belt that extends over the stepped portion of the stepped roller and is driven at a speed faster than the paper conveyance speed of the automatic paper loading means; and a flat belt provided below the flat belt. , a suction means for suctioning the continuous folded paper in the direction of the flat belt; a conveyance means provided on the downstream side of the flat belt for transporting the continuous folded paper; and when automatically loading the continuous folded paper, the suction means operating the continuous folding paper to attract and convey the continuous folded paper to the flat belt;
When printing on the continuous folded paper, the control means stops the operation of the suction means and the flat belt, and transports the continuous folded paper using the convex portion of the stepped roller as a guide means. This is achieved by providing a paper transport device characterized by the following.

(F) Embodiments of the Invention FIG. 2 is a diagram for explaining a paper conveying device according to the present invention.

In the figure, the paper 5 is fed by the tractor 8 via the guide 22 to the stepped roller 20, and is further fed in the direction of arrow A by the rotation of the stepped roller 20.

The paper 5 sent between the stepped rollers 20 and 21 is conveyed while being attracted to the flat belt 24 by a suction force generated in the direction of arrow B by a suction means 23, such as a small fan. At this time, flat belt 2
Paper 5 is transported by tractor 8 at a circumferential speed of 4.
By setting the conveyance speed faster than , all wrinkles caused by folding the paper can be removed.

Next, the paper 5 with wrinkles removed is sent to the entrance guide 25 of the heat-fixing device 9, passes through the heat-fixing device 9, and is sent to the folding machine 11, thereby completing the paper loading.

Thereafter, when a print start switch is pressed on an operator panel (not shown), printing is started. At this time, the driving of the flat belt 24 and the suction means 23 is stopped.

Therefore, the paper 10 is moved between the guide 22 and the stepped roller 2.
It travels guided by the convex portions 0 and 21 and the entrance guide 25. In other words, when the paper 5 is transported at high speed after printing starts, an appropriate gap is created between the paper 5 and the flat belt 24, and the paper 5 and the flat belt 24 do not come into contact with each other. There is no need to worry about the destruction of the powder image or the wear of the flat belt 24, and the paper can be conveyed satisfactorily.

(G) Effects of the Invention As explained above, according to the present invention, it is possible to prevent the occurrence of wrinkles due to folding of paper, so that paper jams do not occur near the entrance or inside the heating fuser. , automatic paper loading can be carried out smoothly, and the operability is extremely good. Further, when printing and transporting paper, it is possible to carry out normal paper transport by simply stopping the drive of the suction means and the flat belt.

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining a conventional paper feeding device.
FIG. 2 is a diagram for explaining the paper conveying device according to the present invention. In the figure, 5 is paper, 9 is a heat fixing device, 2
0 and 21 are stepped rollers, 22 is a guide, 23 is a suction means, 24 is a flat belt, and 25 is an entrance guide.

Claims (1)

[Scope of Claims] 1. automatic paper loading means for automatically loading continuous folded paper from a paper supply unit to a paper storage unit via a printing unit; a stepped roller provided in a conveyance path for the continuous folded paper; a flat belt that extends over the stepped portion of the stepped roller and is driven at a speed faster than the paper conveyance speed of the automatic paper loading means; a suction means for sucking the continuous folded paper; a conveyance means provided on the downstream side of the flat belt for transporting the continuous folded paper; and when automatically loading the continuous folded paper, the suction means is operated to transport the continuous folded paper to the flat belt. A control means for transporting the continuous folded paper by suction by a belt, and when printing on the continuous folded paper, stops the operation of the suction means and the flat belt, and transports the continuous folded paper using the convex portion of the stepped roller as a guide means. A paper conveyance device comprising: