JPS58188245A - Sheet guiding device - Google Patents

Abstract

PURPOSE:To permit a sheet to smoothly and properly pass in a sheet guiding device havig a pair of guiding plates, by providing an auxiliary member having elasticity to a conveying path for the guiding plate and conveying the sheet passing between the guiding plate and the auxiliary member. CONSTITUTION:A sheet S conveyed from a paper feed side is fed with a proper interval taken by resist rollers 2a, 2b. The sheet S advances along an upper sheet guiding plate 3 or a bottom sheet guiding plate 4 to pass through a gap between the plate 4 and an auxiliary sheet guiding member 5 and reach a copying part. A point end part 51 of the member 5 is contacted to the plate 4 while the member 5 is made of an elastic material in a level not influencing on the flexibility of the sheet S and on the conveying force of the rollers 2a, 2b, thus the sheet S is conveyed and guided through a fixed position without affected by a large resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION This relates to a sheet guiding device for a machine (hereinafter referred to as a copying machine, etc.) that is equipped with a mechanism for conveying sheets of paper through guides.

Conventionally, in this type of apparatus, when a sheet enters a photoreceptor drum in a copying machine, the entrance angle and position are determined by the angle of the sheet guide plate with respect to the sensor drum 5, the angle with the photoreceptor drum 5, etc. It is determined by the gap and the gap between the top and bottom of the sheet guide guide plate. If the gap at the tip of the sheet guide plate under -h is large, the sheet will be exposed to light when it is guided by the upper guide plate Kfhi and when it is guided by the lower guide plate 'rf3. The angle and position of approach to the body drum will change.

Therefore, in the conventional type, it is necessary to make the interval between the tips of the upper and lower guide plates narrow, but if the interval is too narrow, sheet jams are likely to occur. is extremely difficult to determine.

Therefore, the object of the present invention is to provide a novel sheet guiding device that improves these drawbacks.

Another object of the present invention is to provide a sheet guiding device that can easily adjust the gap between the guides that guide the sheet.

Another object of the present invention is to provide a sheet guiding device in which an elastic guide auxiliary plate is provided between the sheet guiding guides.

That is, the main structure of the present invention that can achieve the above object is a sheet guiding device that guides and conveys a sheet by passing through a gap between a pair of guide plates, and an auxiliary member having elasticity is provided in the conveyance path of the guide plate. This is a sheet guiding device that guides a sheet by passing between the guide plate and the auxiliary member.

Hereinafter, a specific embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of an embodiment of the present invention. In the figure, 1 is a photoreceptor drum, 21 and 2b are registration rollers, 6 is an upper sheet guide plate, 4 is a lower sheet guide plate, and 5 is a sheet guide auxiliary member made of a thin elastic resin (for example, mylar). Product name)) or made of leaf spring material, etc. 6 is II on the photosensitive drum 1
! This is a corona transfer device that transfers 116 onto a sheet.

The sheet 8 conveyed from the paper feed section side is moved by the registration roller 2a.
112bK, the sheet S is sent out at the appropriate timing, and the sheet S is advanced along the upper sheet guide guide plate 6 or the lower sheet guide guide plate 4, and the sheet S is advanced along the 1'-to lower guide plate 4 and the 1'-to guide auxiliary member. 5 and reaches the transfer section. Although the tip 51 of the sheet guiding auxiliary member 5 vibrates against the sheet guiding lower guide plate 4, it does so to the extent that it does not significantly affect the stiffness of the sheet S and the conveying force of the registration rollers 2a and 2b. Since it is made of a material having an appropriate elastic force, when the sheet passes through, it is pressed against the lower sheet guide plate 4 with a moderate pressing force. Therefore, the sheet 8 to be conveyed is conveyed and guided at a certain position at the tip end 51 of the sheet guiding auxiliary member 5 without being subjected to large resistance.

FIG. 2 shows the arrangement of the sheet guiding auxiliary member 5.

The sheet guide auxiliary member 5 is made of several Mylar sheets (product name) with a thickness of 200μ and a price of $20, each size W1 as shown in the figure.
・In combination with W2, etc., it is attached to the upper guide f4 of the sheet guide. Note that several sheets of the sheet guiding auxiliary member 5 may be attached to each other independently, or they may be integrally combed and thin, and the shape may be arbitrary.

As described above, according to the configuration of the present invention, even if the interval between the sheet guide plates is widened, the sheet conveyed between the sheets can properly pass through a predetermined position, so that the sheet can be moved to the photosensitive drum, etc. The approach angle, position, etc. with respect to the surface can be arbitrarily selected.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a plan view of its main parts. In the figure, 6 is an upper sheet guide plate, 4 is a lower sheet guide plate, and 5 is a sheet guide auxiliary member. Applicant Canon Co., Ltd. Lζtun

Claims (1)

[Scope of Claims] In a sheet guiding device that guides and conveys a sheet by passing the sheet through a gap between a pair of guide plates, an auxiliary member having elasticity is provided in the conveyance path of the guide plate, and a gap between the guide plate and the auxiliary member is provided. A sheet guiding device that guides the sheet by passing it through.