JPS6351235A - Paper feeder - Google Patents

Abstract

PURPOSE:To separate and take out sticky cutform by making a space between the lowest portion of a stopper crossing a guide-surface and the guide-surface as thick as a sheet of a cutform tiered on the guide-surface and providing a marshalling surface, resisting surface and glinding surface in order toward the outside. CONSTITUTION:A cutform (post-card) 21 tiered on a guide-surface is carried by a paper-feeding roller, at whose exit portion is provided a stopper 36 crossing the guide-face 22, and between it and the guide-surface 22 is provided a space 35 which has an equivalent thickness to that of a sheet of a cutform 21. A slope 37 inclining in a curved surface toward the sending-out direction of the post-card 21 gradually along from the uppermost-tier post-card 21 toward the guide-surface 22 on one side of the stopper 36 is formed. At this slope 37 are arranged in order a low-frictional-coefficient glinding-surface 38 contacting the lowest-tier sheet, a resisting surface 39 having a great resistance and a marshalling surface 40 having a small frictional coefficient. Accordingly, the sticky cutforms can be sent out surely one by one in a separated way.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a paper feeding device that separates a large number of stacked m-sheets one by one and sends them out by a paper feeding roller.

BACKGROUND OF THE INVENTION This type of paper feeding device, as seen in paper feeding cassettes, has a device in which claws are used to press both ends of the outermost sheet with which a paper feeding roller comes into contact. In addition, when a paper feed roller and a reversing roller, which is connected to a motor via a slip clutch and rotates in the opposite direction to the paper feeding direction of the paper feed roller, are arranged to face each other, and a single paper sheet passes between them. In this case, the slip clutch is slipped and the reversing roller is rotated in the sheet feeding direction due to the frictional force with the sheet, and when multiple sheets are being fed while overlapping, the rotation speed of the reversing roller is As the other slips slip, the slip clutch is maintained in the power transmission state, and the rotation of the reversing roller pushes back the slips other than the one to be sent, thereby separating the slips one by one. There is something I tried to do.

Furthermore, as shown in FIG. 5, the leading edge of the cut 102 is held down by a stopper 101, which has a number of steps determined by the steps of one cut, and the cut 102 is held in place by the steps of the stopper 101. Some paper sheets are separated one by one and fed by a paper feed roller 103.

Problems to be Solved by the Invention However, in the case where both ends of the cut sheet are held down by claws, the ends of the cut sheet warp when they are removed from the claws.
It is not suitable for stiff paper sheets such as postcards as they will have creases. Also.

Those that use reversing rollers require power and a slip clutch, making the structure complex and expensive. moreover,
In the case shown in FIG. 5, it is difficult to form the stopper 101 and it is difficult to determine the height of the step.

Means for Solving the Problems A guide surface that supports a large number of stacked sheets and a paper feed roller that contacts the outermost sheet on the side of this guide surface are provided, and a stopper that intersects with the guide surface is provided. A gap approximately equal to the thickness of one sheet is formed between the end of the stopper and the guide surface, and the single sheet is formed on one surface of the stopper gradually toward the guide surface. An inclined surface is formed that slopes in the direction of ticket feeding, and a sliding surface with a low coefficient of friction and a sliding surface with a high coefficient of friction is contacted by the leading edge of one of the tickets supported by the guide surface. A resistance surface and an alignment surface with a small coefficient of friction, which the leading edge of the cut sheet comes into contact with, are sequentially arranged in a direction away from the guide surface.

Function: Therefore, when the paper feed roller feeds a ticket along the guide surface, the alignment surface aligns the tips of the ticket, the resistance surface prevents the advance of the ticket, and the outermost sheet on the guide surface side is Slide only the vote in contact with the sliding surface.

Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 to 4. As shown in FIG. 4, inside the main body 1, there is a rotating photoreceptor 2, a charger 3 that forms a charged layer on the outer periphery of the photoreceptor 2, and a charger 3 that forms a charged layer on the outer periphery of the photoreceptor 2. An exposure section 4 scans a laser beam to form an electrostatic latent image, a developing device 5 develops the electrostatic latent image, and the developed image is transferred from a first cassette case 6 to a paper feed roller 7 and a feed roller 8. , 9.10 and ticket 1 sent by
Transfer charger 12 to transfer to 1 and cut sheet 11 after transfer
A fixing roller 13 for fixing the image is provided. The ticket 11 of the first cassette case 6 is curved into a U-shape by a guide plate 14 and supplied to the transfer charger 12.

Further, a second cassette case 15 is detachably attached to the front surface of the main body 1. As shown in FIG. 1, this second cassette case 15 has a curved surface 16 for conveying the ticket 11 between it and the guide plate 14. A locking protrusion 17 is formed that removably engages with locking holes (not shown) formed on both sides.

A plurality of openings 18 are arranged in the left-right direction on the curved surface 16,
A pinch roller 19 that contacts the feed roller 8 is provided inside these openings 18 and is rotatably biased in one direction by the plate spring 2o.

The second cassette case 15 has a bulging guide surface 22.23 that supports the postcard 21, which is a single sheet, and a guide surface 22.23 that contacts the outermost sheet 21 on the side of the guide surface 22.23. A paper roller 24 is rotatably provided. A pair of left and right eccentric cams 25 and a gear 26 are fixed to the shaft portion 24a of the paper feed roller 24, and a motor 28 that drives a gear 27 meshed with the gear 26 is connected to the second cassette case 1.
It is installed on 5. In addition, the second cassette case 15
a pair of left and right swing arms 3o that rotatably hold both ends of the push-up roller 29 and come into contact with the eccentric cam 25;
A cover 31 that covers the leaf s21 and a plate 33 having a weight 32 that presses the uppermost postcard 21 are provided.

Both sides of the cover 31 are rotatably held by pins 45 erected on the cassette case 15, and both ends of the plate 33 are rotatably held in holes 34 formed in the cover 31.

Further, as shown in an enlarged view in FIG. 2, a stopper 36 is fixed to the inner surface of the cover 31 with a gap 35 corresponding to the thickness of 21 postcards formed between the cover 31 and the guide surface 22. On one side of this stopper 36, the postcard 21 is gradually moved in the feeding direction (left) as it goes from the topmost postcard 21 toward the guide surface 22.
An inclined surface 37 is formed with a curved surface toward the
The inclined surface 37 includes a sliding surface 38 with a low coefficient of friction that contacts the leading edge of the postcard 21 on the bottom layer on the guide surface 22 side, a resistance surface 39 with a high coefficient of friction made of sponge or the like, and a resistance surface 39 with a high coefficient of friction such as a sponge. J where the tip edge touches! Alignment surfaces 40 having a small A friction coefficient are formed in a Q-order arrangement in a direction away from the guide surface 22.

Furthermore, a gate 42 having a gap slightly larger than the thickness of 21 postcards is formed at the lower end of the protrusion 41 that protrudes from both sides of the guide surface 22.

Further, as shown in FIG. 3, a support piece 43 rotatably supports the bin 30a protruding from the end of the swing arm 30, and a support piece 43 rotatably supports the shaft 24a of the paper feed roller 24. 44 is formed integrally with the second cassette case 15. Furthermore, a bin 45 that rotatably holds the cover 31 is erected on the outside of the protrusion 41 .

In such a configuration, the cut sheet 11 of the first cassette case 6 is pulled out by the feed roller luff,
9.10, the light is supplied to the photoreceptor 2 and printed. When printing on the postcard 21, the paper feed roller 24 is moved by the motor 28.
Paper is fed by rotating. That is, the postcard 21 in the lowermost layer is transferred to the paper feed roller 24 under the pressure of the weight 32.
is sent to the left by At this time, the tips of the postcards 21 in the upper layer gradually move downward while being aligned by the alignment surface 40. Even if the leading edge of the postcard 21 is bent on both sides, it will be straightened in the process of moving forward and downward little by little along the alignment surface 40. The postcard 21 that comes into contact with the resistance surface 39 is difficult to slip against this resistance surface 39 which has a large frictional resistance, so it stagnates and the separation effect on the lowest leaf s21 is reliably performed. In this way, the postcard 21 of the second cassette case 15 is sent to the main body 1. In addition, the paper feed roller 24 rotates once and stops in order to broadcast the postcard 21, but the cam 25 swings with a high vert during the second half of a rotation from the time when the leading edge of the postcard 21 reaches the feed roller 9 in the main body 1. moving arm 3
Push up o. As a result, the roller 29 pushes up the postcard 21 and separates it from the paper feed roller 24, so that subsequent postcards 21
The operation of feeding 1 is left to the feed rollers 9 and 10 on the main body 1 side.

Also, leaves in the second cassette case 15? 21, the cover 3i is opened upward using the pin 45 as a fulcrum. At this time, since the plate 33 follows the cover 31 and is suspended in the hole 34 beyond the vertical plane, the postcards 21 can be stacked on the guide surfaces 22 and 23 without being hindered by the weight 32.

Effects of the Invention Since the present invention is configured as described above, when the paper feed roller feeds the cut along the guide surface, the alignment surface aligns the leading edge of the cut and the resistance surface prevents the advance of the cut. Only the outermost sheet on the guide surface side can be slid by contacting the sliding surface. Therefore, even a stiff sheet can be reliably separated one sheet at a time. This has the effect of simplifying the RX structure that separates the.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional side view of the main parts, FIG. 2 is an enlarged longitudinal sectional side view showing the structure of the stopper, and FIG. Fig. 4 is an exploded perspective view showing the shape of the guide surface and the support structure of the paper feed roller, etc., Fig. 4 is a longitudinal sectional side view showing the overall structure on a reduced scale, and Fig. 5 is a longitudinal sectional side view showing a conventional sheet separating means. be. 21...Postcard (single sheet), 22.23...Information surface, 2
4... Paper feed roller, 35...: Gap, 36... Stopper, 37... Inclined surface, 38... Sliding surface, 39...
・Resistance surface, 40...alignment surface

Claims (1)

[Claims] A guide surface that supports a large number of stacked tickets and a feed roller that contacts the outermost ticket on the side of this guide surface are provided, a stopper that intersects with the guide surface is provided, and an end of this stopper is provided. A gap approximately equal to the thickness of one cut sheet is formed between the guide surface and the guide surface, and a gap is formed on one surface of the stopper so that the stopper is gradually inclined in the feeding direction of the cut sheet as it approaches the guide surface. a sliding surface with a low coefficient of friction that is in contact with the leading edge of one of the single sheets supported by the guide surface, a resistance surface with a large coefficient of friction, and a sloping surface with a high coefficient of friction; A sheet feeding device characterized in that alignment surfaces having a small coefficient of friction that the leading edge abuts are sequentially arranged in a direction away from the guide surface.