JPS6246823A - Sheet feeder - Google Patents

Abstract

PURPOSE:To make paper replenishing work into simplification and certainty, by pressing a hopper plate with opening motion of a front cover, and separating it from a pinch roller, while constituting a separator so as to be separated from this pinch roller. CONSTITUTION:When a front cover 1 is opened in an arrow A direction, an L-shaped lever 4 is driven by a cam surface 2, making a hopper plate 6 move in a lower direction by a shaft 7, whereby it is separated from a pinch roller 9. And, an L-shaped lever 8 is driven by a cam surface 3, weakening the supporting force of a separator 13 by a shaft 15, and this separator 13 moves in a lower direction by a spring 14, separated from the pinch roller 9. With this motion, the separator 13 presses paper on the hopper plate 6 and checks a curl in the paper. With this constitution, replenishing work comes simple and certain.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a sheet feeder.

[Prior Art] ' Conventionally, in this type of sheet feeder, paper is fed in conjunction with the opening operation of the front cover, etc. After moving the placed hopper plate downward, that is, in the direction away from the pinch roller, paper is supplied to the hopper plate, and then, in conjunction with the closing operation of the front cover, the hopper plate is moved in one direction, that is, pinched. It was forced to move closer to Laura.

[Problems to be solved] In the conventional example described above, there is a drawback that the paper curls due to the stopper when the hopper plate moves, and it is necessary to remove the curls of the remaining paper when replenishing the paper. There are disadvantages that cannot be avoided.

[Means for Solving Problems] ■- In order to solve the above-mentioned conventional problems, the present invention suppresses the paper remaining on the hopper plate -1- when replenishing paper, so that the remaining paper is removed by a stopper or the like. To provide a novel sheet feeder which prevents curling, etc., pm, `h, and simplifies and secures paper replenishment work.

To this end, the present invention provides a sheet feeder that sequentially feeds sheets of paper placed on a hopper plate using a separator and a pinch roller, and includes a front cover that can be opened and closed, and first and second inlets formed near a support portion of the front cover.
a cam surface; a first lever driven by the first cam surface to move the hopper plate away from the pinch roller when the front cover is opened and to approach the pinch roller when the front cover is closed; and a second lever driven by a cam surface of No. 2 to temporarily separate the separator from the pinch roller when opening and closing the front cover, respectively. It is something.

[＾Flow side j Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a sectional view of one embodiment of the sheet feeder of the present invention. FIGS. 2 and 3 are explanatory diagrams of the operation of the embodiment shown in FIG.

Reference numeral 1 denotes a front cover of the sheet feeder, which is pivotally supported to the housing 17 by a support portion IO so as to be openable and closable.

The front cover 1 has cam surfaces 2 and 3 on both inner and outer surfaces near the support portion 10, respectively. 4 has one end with cam surface 2
A pair of L-shaped levers that are in contact with the housing 17 at the center by a pivot shaft 16, and a shaft 7 inserted into the free hole of the hopper plate 6 between the other ends. It is located. Reference numeral 8 designates a pair of L-shaped levers having one end abutted against the cam surface 3, whose center portion is pivoted to the housing 17 by a pivot shaft 11, and a shaft 15 is disposed between the other ends. ing. 12 is a spring disposed between the housing 17 and the vicinity of the other end of the L-shaped lever 8;
The support for one side is increasing. 14 is housing 1
A spring placed between 7 and separator 13,
The separator 13 is being pulled downward. 9 is a pinch roller arranged near the lower end of the hopper plate 6;
The sheets placed on the hopper plate 6-L and stopped by the stopper 5 are separated one by one in cooperation with the separator 13 and delivered to the platen 19 and pressure rolls 20, 21 via the guide plate 18.

When replenishing paper, first open the front cover 1 in the direction of the arrow. The front cover 1 is rotated around the support part 10. When the front cover 1 is in the closed state shown in FIG.
During the period from to the half-open state shown in the second IA, the L-shaped lever 4 is driven by the cam surface 2 and the shaft 7 gradually moves the hopper plate 6 downward, that is, in the direction away from the pinch roller 9. Further, the L-shaped 8-8 is driven by the cam surface 3, and the supporting force of the separator 13 by the shaft 15 is weakened, so that the separator 13 is moved downward by the spring 14, that is, in a direction away from the pinch roller 9. As a result, the separator 13 presses the paper placed on the hopper plate 6 to prevent curling and the like from occurring. During the period when the front cover 1 changes from the half-open state shown in FIG. 2 to the fully open state shown in FIG. 3, the L-shaped lever 4 is further driven by the cam surface 2 and the shaft 7 moves the hopper plate 6 downward. urge Further, the L-shaped lever 8 is driven by the cam surface 3 and the separator 1 is driven by the shaft l5.
3 is strengthened, the separator 13 is moved in two directions, ie, in a direction approaching the pinch roller 9, while resisting the spring 14. As a result, the separator 13 returns to its original position and does not interfere with paper replenishment work.

After replenishing paper to hopper plate 6F.

-1 to the front force is closed in the direction of arrow B. The front cover 1 is rotated again around the support part 10. During the period when the front cover 1 changes from the fully open state jB shown in FIG. 3 to the half-open state shown in FIG. It is moved in the direction approaching the roller 9. Further, since the L-shaped lever 8 is driven by the cam surface 3 and the supporting force of the separator 13 by the shaft 15 is weakened, the separator 13 is driven by the spring 1.
4, it is moved downward, that is, in a direction away from the pinch roller 9. As a result, the separator 13 presses the paper placed on the hopper plate 6 to prevent curling and the like from occurring. During the period from the half-open state shown in FIG. 2 to the closed state shown in FIG. 1, the L-shaped lever 4 is further driven by the cam surface 2 and the shaft 7 moves the hopper plate 6 upward. Finally, the uppermost sheet placed on the hopper plate 6 is brought into contact with the pinch roller 9. Further, the L-shaped lever 8 is driven by the cam surface 3, and the supporting force of the separator 13 by the shaft 15 is strengthened, so that the separator 13 moves upward while resisting the spring 14, that is, the pinch roller 9
is forced to move in a direction approaching . As a result, the separator 13 returns to its original position and the paper replenishment operation is completed.

[Effects of the Invention] As is clear from the double series, the present invention transmits the opening and closing movements of the front cover to the lever by means of a cam surface formed near the supporting portion of the front cover, thereby causing the separator to move when the front cover is opened and closed, respectively. By temporarily moving in the direction away from the pinch roller, that is, in the direction toward the hopper plate, it has the effect of avoiding curling of the paper placed on the paper due to the movement of the hopper plate due to the stopper, etc. . Therefore, the present invention has the effect of simplifying and ensuring paper replenishment work.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the sheet feeder of the present invention;
2 and 3 are explanatory views of the same operation. ■=Front cover 2.3: Cam surface 4.8: Front cover 5: Stopper 6: Hopper plate 7: Shaft 9: Pinch roller 10: Support part 11: Pivot shaft 12.14 Spring 13: Separator 15: Shaft 17: Housing

Claims (1)

[Claims] In a sheet feeder that sequentially feeds paper placed on a hopper plate using a separator and pinch rollers,
a front cover that can be opened and closed; first and second cam surfaces formed near the support portion of the front cover;
is driven by a cam surface to separate the hopper plate from the pinch roller when the front cover is opened;
and a first lever that causes the pinch roller to approach when the front cover is closed, and a second lever that is driven by the second cam surface and causes the separator to be temporarily separated from the pinch roller when the front cover is opened and closed, respectively. A sheet feeder comprising a lever.