JPS6048861A - Paper carrier for copier - Google Patents

Abstract

PURPOSE:To prevent deterioration of suction efficiency by arranging a belt body only at the portion to be applied with suction while employing a guide member for promoting paper carriage at the other portion. CONSTITUTION:A suction fan 6a is provided while many holes are made to suck the paper mounted on two belt bodies 6b. Auxiliary paper feed guides 6c are provided at both sides of the belt bodies 6b. The carrier has the suction width (L) narrow with respect to the maximum copiable paper width. Here, the belt is replaced with a paper guide 6c at the portion other than sucking portion. Upon passage of paper having such size as longer than the suction width, the resistances at the left and right sides of paper guide 6c will be same to maintain linear advancing performance of paper. While the paper will cover the sucking portion completely to increase the sucking force and to prevent slip.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a device for conveying paper within a copying machine.

<Prior Art> Conventionally, in copying machines, there have been two types of paper conveyance devices using a belt that utilize the suction effect of a proafan.

(B) As shown in Figure 1, multiple bells F BI + B2
A large number of holes are drilled in each of the belts B1 and B8, and a suction fan applies physical suction force through the holes to suction and adhere the paper that spans the belts B1 and B2+B8, and as the belts B21 and B8 are interlocked, A method of transporting the paper in the forward direction (B) As shown in Figure 2, multiple narrow bells) B4゜B
5+ B6+ B7+ B8 A method of conveying paper by suctioning it from the interval between the belts (arrows indicate the suction effect).

In all of the paper conveyance devices of conventional copying machines mentioned above, the paper suction width is equal to the maximum paper width of the copying machine. Therefore, in the paper conveyance devices of conventional copying machines, the paper to be copied is There is no problem if the paper is the maximum paper width, but if the paper to be copied is smaller than the maximum paper width, uncovered portions of the paper may occur on both sides (or one side) of the paper. Therefore, there was a problem that the suction effect was reduced.

This problem of reduced suction effect is particularly noticeable in small-sized paper, such as postcards, library cards, and famous paper.

<Object of the Invention> In view of the above, the present invention provides a paper conveyance device for a copying machine in which a belt body is disposed only in a portion where a suction action is performed, and the other portions are simply used as guide bodies for promoting conveyance of paper. The purpose is to provide this and eliminate the decrease in suction efficiency.

<Example> The configuration of the present invention will be explained with emphasis on implementation.

FIG. 3 shows a perspective view of a paper conveyance device of a copying machine according to an embodiment of the present invention.

The paper conveyance device of this embodiment is only for conveying the transferred paper after the transfer process is completed, and in the figure, 1 drawn with a broken line represents the photosensitive drum. The paper is conveyed to the transfer section of the photosensitive drum 1 by being held by a pair of PS rollers 2 and 3, moved forward by rotation thereof, and sliding on a paper guide 4. 5 is the charger.

Now, the paper conveyance device of this embodiment is indicated by 6 in the figure, and is provided with a fan 6a for suction and a multi-hole, through which the paper is placed, through which the suction action of the fan 6a spreads. It is composed of two belt members 6b, and guide members 6c provided on both sides of the belt members 6b to assist in feeding the paper (both sides of the paper). In the figure, an arrow X indicates the direction of the suction action of the fan, that is, the direction of the wind. As shown in the figure, the belt body 6b is wound around a drive roller, and is driven by the rotation of the roller.

The paper conveyance device of this embodiment is characterized by the fact that the belt body 6b is arranged only in the area where the suction action is performed by the fan 6a. The paper always covers the entire belt body 6b even if it is the largest/J% size.

The belt body 6b and the guide body 6c are shown in a plan view as shown in FIG. and the sum of the widths of the guide body 6c), the suction width t is small. In the same figure, it was found that the number of holes (holes) h in each belt body 6b was 80, and that φ4 per belt body had the highest conveyance capacity. The material of the belt body 6b is spantex, and the surface of the belt body 6b is coated with neoprene rubber.

As in this embodiment, even if the belt other than the suction portion (belt body 6b portion) is eliminated and the paper guide 6c is used for the portion other than the suction portion, if a paper larger than the suction width passes through the paper guides on both the left and right sides. Since the resistance at 6c is the same, the straightness of the paper is not affected so much, and since the paper is completely covered by the suction portion, the suction force is strong and no slipping occurs.

Further, as a result of experiments, it was found that there is no problem in conveyance if the ratio of the maximum sheet width to the suction width t = t/L is as follows.

02≦≦065 Note that in the above embodiment, the belt body 6b is placed at the center of the paper conveyance part because it is assumed to be a center-based copying machine, but the place where the belt body 6b is placed may be changed as appropriate. is within the range that can be easily accomplished by a person skilled in the art.

Effects> As described above, according to the present invention, in a paper conveying device provided in a copying machine, there is no reduction in the suction effect, and at the same time, the number of sheets of the conveying carrier portion, that is, the belt, is reduced, and the size of the belt driving roller is reduced. Cost reduction can be achieved.

[Brief explanation of the drawing]

1 and 2 are plan views of a paper conveyance device of a conventional copying section, FIG. 3 is a perspective view of a paper conveyance device of a copying machine according to the present invention, and FIG. 4 is a paper conveyance device of a copying machine according to the present invention. FIG. 2 is a plan view of the device. ]・Photoreceptor drum, 6...Paper transport device, 6a fan,
6b belt body, 6c guide body, h/hole○

Claims (1)

[Scope of Claims] l A device for conveying paper provided in a copying machine, which has a suction section that performs a suction action, and a hole, through which the suction action of the suction section spreads. 1. A paper conveying device for a copying machine, comprising: a belt member on which is placed; and a guide portion provided on a side of the belt member to assist in feeding the paper.