JPH08324816A - Paper sheet separating mechanism - Google Patents

Abstract

PURPOSE: To provide a paper sheet separating mechanism having a simple structure and capable of accurately adjusting the position of a friction pad according to a paper sheet. CONSTITUTION: A holding member 7 for holding a friction pad 9 so as to bring this into contact with and press the same against the outer peripheral surface of a feeding roller 1 is attached to a supporting arm 5 using the rotary shaft 3 of the feeding roller 1 as a swinging shaft. By swinging the supporting arm 5 around the rotary shaft 3 of the feeding roller 1, the position of the friction pad 9 against the feeding roller 1 is adjusted and the inserting angle of the paper sheet delivered from the stacked paper sheets against the friction pad 9 is adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet separating mechanism for separating cut sheets stacked in a sheet storing section one by one.

[0002]

2. Description of the Related Art As the above-mentioned paper separating mechanism, a friction pad (hereinafter referred to as a pad) is brought into contact with a paper feed roller, and the paper is pulled by a friction force between the outer peripheral surface of the paper feed roller and the friction pad. A method of separating the sheets one by one is known. In this method, two or three sheets of stacked sheets are fed by rotation of a sheet feeding roller and abutted on a pad at a predetermined angle to squeeze the uppermost sheet and separate one sheet. Normal,
Arrangement of the pad with respect to the paper feed roller is in a constant pressing state, and the abutting angle (entry angle θ) is constant regardless of whether the paper is stiff like a postcard or weakly used normally. ing.

In this case, it is known that a constant separating action can be obtained regardless of the type of paper by changing the penetration angle θ according to the strength of the paper.
-282131 has a strong entry angle of θ
1, a sheet separation mechanism capable of adjusting the state of the pad is disclosed so that θ1 <θ2, as shown in FIG.

This paper separating mechanism has a fixing member having a pad, and a tension bracket which holds the fixing member and is pivotally supported by a tension spring so as to be rotationally biased. The pad is brought into contact with the surface of the paper feed roller. A movement guide along the outer peripheral surface of the paper feed roller is formed on the tension bracket, and the fixed member provided with the pad meshes with a shaft extending perpendicular to the paper feed roller shaft below the movement guide. ing. Then, by rotating a knob provided at the end of the shaft, the fixed member is moved along the movement guide, thereby adjusting the state of the pad.

[0005]

However, in the above-mentioned prior art, although the angle at which the sheet enters can be adjusted, the bracket formed with the guide for guiding the fixing member along the sheet feeding roller and the fixing member are moved. The shaft and the like are required, and the structure of the adjusting mechanism becomes large and complicated.
Further, since the fixing member is guided by the guide formed along the outer peripheral surface of the sheet feeding roller, if the various members such as the bracket having the guide, the fixing member, and the like are not accurately aligned, depending on the place. The pressing force of the pad changes. It is an object of the present invention to provide a paper separating mechanism that has a simple structure and can accurately adjust the position of the pad according to the paper.

[0006]

In order to solve the above-mentioned problems, a sheet separating mechanism of the present invention comprises a sheet feeding roller with which stacked sheets are brought into contact, and a friction member which is brought into contact with and biased by the sheet feeding roller. , Adjust the position of this friction member with respect to the paper feed roller,
An adjusting mechanism for adjusting an intrusion angle of the laminated sheet with respect to the friction member, the adjusting mechanism being provided with a support arm having a rotation axis of the sheet feeding roller as a swing axis, A holding member that holds the friction member so as to abut and bias the outer peripheral surface of the sheet feeding roller, and a swinging unit that swings the support arm to adjust the position of the friction member with respect to the sheet feeding roller. It is characterized by that.

[0007]

[Function] The friction member is brought into contact with the outer peripheral surface of the paper feed roller,
The holding member that is held so as to be urged is attached to a support arm that uses the rotation axis of the sheet feeding roller as a swing axis, and by simply swinging the support arm around the rotation axis of the sheet feeding roller, The position of the friction member with respect to the feed roller can be adjusted. As a result, the penetration angle of the paper fed from the laminated paper with respect to the friction member is adjusted.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be specifically described below with reference to the accompanying drawings. FIG. 2 is a perspective view showing the overall structure of the paper separating mechanism, and FIG. 3 is a side view thereof.

A rotary shaft 3 to which a paper feed roller 1 is attached
Is rotatably supported by the main body of the paper feeding device, and is rotationally driven by a drive mechanism (not shown). Rotating shaft 3
An extension portion 5a extending along the extension portion 5a is formed on the support member 5, and a support arm 5 having the rotating shaft 3 as a swing shaft is arranged therein. A holding member 7 is provided on the extending portion 5 a so as to face the paper feeding roller 1. The holding member 7 includes a bracket 8 attached to the extending portion 5a of the support arm 5,
The pad 9 includes a pad base 10 which is held by the bracket 8 and to which a pad 9 which is a friction member is fixed, and an urging spring 12 which is arranged between the extending portion 5a and the pad base 10. As the base 10 moves up and down along the long hole 8a formed in the bracket 8, the paper feed roller 1
Is abutted and urged on the outer peripheral surface of the.

On the outer peripheral surface of the paper feed roller 1, the papers accommodated in the hopper 50 and stacked on the pressure plate 51 are in contact with each other in a pressed state. The support arm 5 is provided with a swinging means for adjusting the position of the pad 9 attached to the extending portion 5a with respect to the sheet feeding roller 1.
The entry angle of the stacked sheets with respect to the pad 9 can be adjusted as shown in FIG.

The structure of the swinging means will be specifically described below. As a means for swinging the support arm 5, a method of swinging stepwise and a method of continuously swinging steplessly can be considered. The configurations shown in FIGS. 2 and 3 are as follows.
An example of swinging the support arm 5 in stages is shown.

An elastic arm 15a is projectingly provided at an extending end portion of the support arm 5, and a positioning claw 15 is formed at a tip of the arm 15a so as to extend downward along the extending direction of the support arm. A positioning member 55 is arranged in the main body of the apparatus along the swinging direction of the support arm 5, and the positioning claws 15 can be engaged with a large number of positioning recesses 55a formed in the positioning member 55. In this configuration, the positioning claw 1
5 is pulled up against the elastic force of the elastic arm 15a, the support arm 5 is rotated, and the positioning claw 15 is moved to the positioning recess 55a.
By locking the pad 9 to the sheet feeding roller 1, the position of the pad 9 with respect to the sheet feeding roller 1 can be adjusted stepwise and fixed. in this way,
Since the swing position of the support arm 5 can be changed stepwise, the pad 9 can be set to an optimum entry angle according to the stacked sheets.

FIG. 4 is a view showing an embodiment of a swing means of a two-step adjusting system for a thick paper sheet position (solid line) and a thin paper sheet position (two-dot chain line). A pin 16 is projectingly provided on the extending end portion of the support arm 5, and the distribution tension spring 1 is provided between the pin 16 and the pin 17 provided on the apparatus main body.
8 are being pulled over. In this configuration, the support arm 5
Rotate the extended end of the pin clockwise and the pin 16 pulls the tension spring 1.
When the neutral line of 8 is crossed, the support arm 5 is urged to rotate clockwise by the pulling force of the tension spring 18 and the stopper 56 '.
The pad 9 is positioned at the thin paper position (two-dot chain line). When the support arm 5 is rotated counterclockwise from this position until the pin 16 crosses the neutral line of the tension spring 18, the support arm 5 is rotated counterclockwise by the rotation biasing force of the tension spring 18. And stops contacting the stopper 56, and the pad 9 is positioned at the cardboard position (solid line). In this way, since the swing position of the support arm 5 can be changed in two steps, the pad 9 can be used for thick or thin paper.
Can be set to an optimum penetration angle.

Next, with reference to FIG. 5, an example of a structure for continuously swinging the support arm 5 will be described. A long hole 20 is formed at the end of the support arm 5, and a nut 21 is arranged in this portion. The nut 21 has a threaded relationship with a screw 23 extending in a direction orthogonal to the nut 21, and can be moved in the arrow direction by operating a knob 25 provided at an end of the screw 23. Movement of this nut 21 and long hole 2
Since the support arm 5 is continuously swung by 0, the position of the pad 9 with respect to the paper feed roller 1 can be continuously adjusted and fixed.

As described above, the position of the support arm 5, that is, the position of the pad 9 with respect to the paper feed roller 1, is changed as shown in FIG. 1 depending on the strength of the paper used. In this case, the positioning member 55 or the knob 2 is provided so that an optimum separating action is given to the used paper.
It is preferable to add a scale or the like to 5.

As described above, by simply swinging the support arm 5 provided with the pad 9, it is possible to easily adjust the entry angle of the paper to the pad 9 and reduce the number of parts. . Further, since the pad 9 also swings integrally with the support arm 5, the pressing force on the sheet feeding roller 1 is always kept constant, and a stable separating action can be obtained.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made. The structure of the holding member that holds the pad provided on the support arm in a pressable manner and the swinging means for swinging the support arm 5 can be appropriately modified.

[0018]

As described above, since the friction member that abuts and urges the paper feed roller is supported by the support arm having the rotation axis of the paper feed roller as the swing axis, the support arm swings. The paper entry angle with respect to the friction member can be adjusted simply by adjusting the moving angle, and the configuration of the paper separating mechanism is small and simple. Further, since the friction member also integrally swings along the outer peripheral surface of the paper feed roller, the pressing force against the paper feed roller is kept constant, and a stable separating action is obtained.

[Brief description of drawings]

FIG. 1 is a diagram showing an intrusion angle of a sheet with respect to a pad, FIG. 1A is a diagram showing a pad position of a sheet having a strong stiffness, and FIG. 1B is a diagram showing a position of a pad of a sheet having a weak stiffness.

FIG. 2 is a perspective view showing the overall configuration of a sheet separating mechanism according to an embodiment of the present invention.

FIG. 3 is a side view of the sheet separating mechanism shown in FIG.

FIG. 4 is a diagram illustrating a configuration example in which a support arm is rocked in stages.

FIG. 5 is a diagram illustrating a configuration example in which a support arm is continuously swung.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Paper feeding roller, 3 ... Rotating shaft, 5 ... Support arm, 7 ... Holding member, 8 ... Bracket, 9 ... Friction pad, 1
0 ... Pad base, 12 ... Energizing spring, 55 ... Positioning recess, 25 ... Knob.

Claims (1)

[Claims] 1. A sheet feeding roller with which the laminated sheet abuts, a friction member that abuts and urges the sheet feeding roller, and a position of the friction member with respect to the sheet feeding roller is adjusted to adjust the laminated sheet friction member. In the paper separating mechanism having an adjusting mechanism for adjusting an intrusion angle with respect to the support arm, the adjusting mechanism is provided with a support arm having a rotation shaft of the paper feed roller as a swing shaft, and the support arm is provided with the support member for supplying the friction member. A holding member that holds the outer peripheral surface of the paper roller so as to abut and urge the outer peripheral surface of the paper roller; and a swinging unit that swings the support arm to adjust the position of the friction member with respect to the paper feeding roller. Paper separation mechanism.