JPH02276737A - Paper separating mechanism of paper feeding device - Google Patents

Abstract

PURPOSE:To carry out separation-feeding of the tough paper and the paper whose edge part is rough because of the burrs in cutting, by installing a separating inclined surface positioned under the paper supporting surface of a separating hook. CONSTITUTION:When a printer body is operated, the revolution of a platen is transmitted to a paper feeding roller through a driving gear and a wheel train, and the force for shifting the paper in the uppermost layer downward acts. Though at this time, the lower edge both corner parts H1a of the paper is supported by the paper supporting surface 21a of a separating hook 21, and bent, the lower edge H1b of the paper does not contact a separating inclined surface 12 and is separated from the separating hook 21, and sent out in the paper feeding direction. Therefore, the contact resistance between the paper and the separating inclined surface 12 is not generated, and separation by a small starting force is permitted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a paper separation mechanism in a paper feeding device that sequentially feeds stacked papers one by one.

[Prior art 1] Conventionally, as shown in FIG. 6, a paper feed device includes a paper feed roller 5 that feeds the paper, and a separating claw that is flat in shape with respect to the paper surface and that can move forward and backward depending on the thickness of the paper. 121 and a separating slope 112 that is inclined downward from the tip of the receiving plate 11 to separate the cardboard is known.

[Problem to be solved by the invention 1. However, in such a paper separation mechanism, contact with the separating slope may occur when the paper is stiff or the edges of the paper are rough due to the edges when the paper is cut. There was a problem in that the resistance was large and a larger starting force was required to cause buckling by the separation claw.

The present invention is intended to solve these problems, and its purpose is to provide a paper separation mechanism that reliably separates and feeds sheets with a smaller starting force.

[Means for Solving the Problems 1] The paper separation mechanism in the paper feeder of the present invention is characterized by a side wall member that regulates the lateral direction of the stacked papers, a receiving plate that regulates the lower surface, and a back surface of the paper. A pair of hopper members consisting of a paper pressure plate that presses forward, a paper feed roller that contacts the top layer of the paper and pulls the paper downward, a separating slope that slopes downward in front of the receiving plate, and a lower end of the paper. In the paper separation mechanism of a paper feeder, which consists of separation claws that are placed in contact with both corners and are movable in a direction substantially perpendicular to the paper surface by external operation, they are located below the paper support surface. It is equipped with a separation slope.

[Example] Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a paper feeding device according to an embodiment of the present invention.

The paper feeding device is placed on the top of the blinker so that the drive gear 3 of the paper feeding device meshes with the platen gear G fixed to the shaft of the platen P.

The drive of the drive gear 3 is transmitted to a paper feed port 5 via a wheel train 4. The hopper member 6 is attached so as to be movable in the axial direction along a guide shaft 9 parallel to the platen P, and includes a paper separating means for holding the accumulated papers and separating them one by one.

FIG. 2 shows a sectional view of the hopper member described above.

The side wall plate 10 regulates the sides of the paper H. A receiving plate 11 that supports the lower end of the paper H is fixed to the lower part of the side wall plate 10. A paper pressure plate 19 is provided on the rear side of the space formed by the side wall plate 10 and the receiving plate 11. Paper pressure plate 1
9 is guided by a guide bin 15 and a groove 16, and presses the paper H against the paper feed roller 5 by a compression spring 17.

FIG. 3 is a side view showing the separation claw mechanism, and FIG. 4 is a perspective view showing the process of separating normal printing paper.

As shown in FIGS. 3 and 4, the separation claw 21 is rotatably attached to a shaft 32 parallel to the guide shaft 9, and contacts the lower corner of the paper H so that the paper support surface 21a is attached to the receiving plate 11. It is located below the surface of the Further, the separation claw 21 presses the paper H using the elastic member 22. The lever 33 is rotatably attached to the side wall plate lO via a shaft 34, and the zero separation claw 21, which has one end engaged with a part of the separation claw 21, can hold down the paper by operating the lever 33. The zero-separation slope 12 that rotates to the released position (dotted chain line in FIG. 3) is inclined forward from a position lower than the paper support surface 21a of the separation claw 21 by an arbitrary distance.

In addition, when the separation claw 21 is moved forward by operating the lever 33, the gap between the tip of the paper support surface 21a and the separation slope 12 is 1, so that when thick paper is fed, it will not get caught on the tip of the paper support surface. I'm keeping a distance like that.

When feeding a large number of sheets of paper, the position of the paper is adjusted so that the inner surface of the side wall plate 10 comes into contact with the side of the paper.
The separation claw 21 is placed in a position where it presses down the paper by operating the lever 33.

When the printer main body is operated after such preparations are completed, the rotation of the platen P is transmitted to the paper feed roller 5 via the drive gear train 4, and a force is generated to move the top layer of paper H, downward. works. At this time, as shown in FIG.
1M is supported and buckled, but the lower end H1b of the paper does not come into contact with the separation slope 12, and is separated from the separation claw and sent out in the paper feeding direction. Therefore, there is no contact resistance between the paper H1 and the separation slope 12, and the paper can be separated with a small starting force.

On the other hand, when printing on stiff paper H2 such as postcards and envelopes, as shown in FIG. The separation claw 21 is adjusted, and the separation claw 21 is moved forward by operating the lever 33 to retreat from the paper path.

When the blink is activated in this state, the paper feed roller 5 sends out the uppermost layer of paper H2 in the paper feeding direction. In this case, there is a gap between the tip of the paper support surface 21a of the separation claw 21 and the separation slope 12 that is large enough to prevent the paper H2 from being caught, so the paper H2 is separated by the separation slope 12 and the printer will be sent to.

[Effect of the invention 1 As explained above, the present invention provides a paper separation mechanism that uses both a separating claw and a separating slope, in which the lower end of the separating claw is shaped to support the paper, and the separating slope is shaped so that it can support the paper when the paper buckles. Conventionally, by setting the bottom edge of the paper at 1 so that it does not touch the paper,
It is now possible to separate and feed stiff paper that requires a large starting force, or paper with rough edges due to cutting during cutting, with a smaller starting force, and can also be used for printing media such as postcards and envelopes as before. Minute l1il feeding, can be done.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a paper feeding device according to the present invention. FIG. 2 is a side sectional view of the hopper member of the present invention. FIG. 3 is a side view showing the mechanism of the separating claw of the present invention. FIG. 4 is a diagram showing the process of separating ordinary printing paper according to the present invention. FIG. 5 is a side sectional view showing the process of separating cardboard according to the present invention. FIG. 6 is an explanatory diagram of a conventional separation mechanism. P... Lower end frame drive gear train paper feed roller hopper member guide shaft side wall plate receiving plate 15 ・ 16 ・ 17 ・ 19 ・ 1a 33 ・ 121 ・ Separation slope, guide bin, groove, compression spring, paper pressure plate, separation claw, paper support surface Elastic members, shafts, levers, shafts, separation slopes, separation claws Figure 1 and above Seiko Epson Corporation Orient Watch Co., Ltd.

Claims (1)

[Claims] (1) A pair of hopper members consisting of a side wall member that regulates the width direction of the stacked paper, a receiving plate that regulates the lower surface, and a paper pressure plate that presses the back surface of the paper forward, and a pair of hopper members that A paper feed roller that contacts and pulls the paper downward, a separating slope that slopes downward in front of the receiving plate, and a separating slope that is arranged in a position that contacts both corners of the bottom edge of the paper, and is moved in a direction approximately perpendicular to the paper surface by external operation. A paper separation mechanism of a paper feeding device consisting of a separation claw movably attached to a paper feeder includes a separation claw having a paper support surface for supporting paper, and a separation slope located below the paper support surface. Paper separation mechanism in a paper feeding device.