JPH0595936U - Paper feed mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] A paper feed mechanism that automatically feeds single-cut sheets. By providing a paper guide in the paper feed case, the paper feed mechanism can be installed vertically. [Structure] When the paper feed case 2 is placed vertically, the paper guide 4 and the tension spring 9 press the paper 3 against the paper 3 to bend downward by its own weight, and prevent the paper from bending.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sheet feeding mechanism for automatically feeding cut sheets.

[0002]

[Prior Art]

 In order to feed paper one by one, there is a paper feeding mechanism having a paper separating means such as a claw in a paper feeding case. This has a mechanism that pushes the paper forward such as a rubber roller and a paper separating means in the paper advancing direction, and presses the paper against the paper separating means to selectively separate only one sheet and feed it. Is.

A specific description will be given with reference to FIG. FIG. 4 (a) has a claw 1 as a paper separating means in the traveling direction of the paper 3, several sheets of paper 3 are placed on a hopper 6, and between the paper feeding case 2 and the hopper 6 which are open at the upper side. There is a hopper spring 7, and the paper 3 is pressed against the paper feed roller 5 by the hopper spring 7. At this time, the hopper 6 rotates about the hopper shaft 8 and changes the tilt angle according to the number of sheets. FIG. 4B illustrates the movement of the paper in this mechanism. When the paper feed roller 5 attached to the chassis (not shown) rotates in the direction of the arrow, the frictional force between the paper 3 and the paper feed roller 5 is larger than the frictional force between the papers, so only one sheet is sent forward, The paper 3 is bent by the claw 1 and the paper feed roller 5 as shown in the figure. After a certain amount of bending, the paper is released from the nail as shown by the dotted line and is fed forward. After that, the paper feeding roller 5 escapes upward by means not shown to prevent the paper from being continuously fed.

[0004]

[Problems to be solved by the device]

 As described above, the conventional paper feed mechanism does not have a mechanism for holding the special paper above the paper feed case as shown in the overall view of FIG. 5, and is held in the paper feed case only by its own weight. Was there. Therefore, when the paper feed case is installed vertically, the paper bends as shown by arrows b and c in FIG. 6, and the paper cannot be held in the case.

An object of the present invention is to provide a paper feeding mechanism that solves the problem that paper cannot be held in the case as described above.

[0006]

[Means for Solving the Problems]

 As a first idea, a paper guide for holding a plurality of paper sheets is provided on the upper surface of the paper feed case. And, as a second idea, the hopper of the paper feed case is integrated with the case, and the increase in the number of parts caused by mounting the paper guide is suppressed.

[0007]

[Action]

 The first means enables the paper to be held in the paper feed case even when the paper feed case is installed vertically.

The second means makes it possible to hold the paper and reduce the total number of parts.

[0009]

【Example】

 An embodiment of the present invention will be specifically described with reference to FIGS.

FIG. 1 is a cross-sectional view showing an example in which the present invention is applied to a cassette type paper feed case. The box-shaped paper feed case 2 has an opening at the top for inserting paper 3, and a claw 1 as a paper separating means is provided at the front of the opening side, a hopper shaft 8 is provided at the bottom rear of the paper feed case, and a hopper shaft 8 is provided. It shows a mechanism having a hopper 6 that moves up and down, a hopper spring 7 that lifts the hopper 6 upward, and a paper guide 4 that has a rotating shaft at the upper rear part of the paper feed case and has its tip pressed against the paper by a tension spring. A paper guide roller 10 is rotatably attached to the tip of the paper guide 4. The paper guide roller 10 is urged by the tension spring 9 in the direction of arrow a. When the paper is fed, the paper guide roller 10 is rotated by the movement of the paper 3 so that it does not become a resistance of the paper feeding. When the paper feed mechanism is set upright, the paper guide 4 receives the weight of the paper 3 and prevents the paper from being deformed and coming off the claw 1.

FIG. 2 shows an example in which, instead of the paper guide roller 10, a paper guide roller row 11 having a plurality of rollers is attached so that the weight of paper can be received in a wide range. Further, instead of the paper guide roller 10, a plate-shaped member having a small friction or a bar-shaped member may be used.

Further, FIG. 3 shows a plate upper member 12 integrally formed with the urging means 6, 7, 8 as a part of the paper feed case 2 in the second embodiment, and the required paper feed due to the spring property of the material. It shows how pressure is being applied.

[0013]

[Effect of the device]

 The present invention allows the paper feed mechanism to be installed vertically. In addition, this installation can be realized and the increase in the number of parts is prevented, thus improving the assemblability.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example in which the present invention is applied to a paper feed case cassette.

FIG. 2 is a cross-sectional view showing an example in which the present invention is implemented by using a paper guide roller array.

FIG. 3 is a cross-sectional view showing an example in which a paper feed case and a hopper are integrated.

FIG. 4 is a cross-sectional view showing a conventional paper feed mechanism using a pawl.

FIG. 5 is a perspective view of a paper feed case used in a conventional paper feed mechanism.

FIG. 6 is a transverse cross-sectional view showing a state of paper when a conventional paper feed case is installed vertically.

[Explanation of symbols]

 1 Claw (Paper Separation Means) 2 Paper Feed Case 3 Paper 4 Paper Guide 5 Paper Feed Roller 6 Hopper 7 Hopper Spring 8 Hopper Shaft 9 Tension Spring 10 Paper Guide Roller 11 Paper Guide Roller Row 12 Plate Member

Claims (2)

[Scope of utility model registration request] 1. A box-shaped paper feeding case 2 having a claw portion 1 formed toward the inside of the opening in a substantially rectangular opening surface portion, and rotatably provided on a bottom surface portion of the paper feeding case 2. A hopper 6 biased by a hopper spring 7 toward the opening surface; a paper feed roller 5 provided above the opening surface and rotatable in the paper feed case 2 toward the pawl portion 1; And a paper guide 4 which is rotatably mounted upward and is biased in the opening surface inward direction. 2. The paper feeding mechanism according to claim 1, wherein the hopper 6 is a plate-like member 12 integrally formed on a bottom surface thereof and having a spring property.