JPH061547Y2 - Paper separation mechanism of automatic paper feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a sheet separating mechanism, which has a separating claw and separates and feeds sheets one by one, in an automatic sheet feeder.

[Conventional technology]

Generally, in a conventional automatic paper feeder that automatically feeds fixed-size paper, a paper separating mechanism is known in which the paper stacked in a storage case is separated and fed one by one by the frictional force of a separation roller. .

FIG. 9 is a perspective view showing a sheet separating mechanism according to a conventional example.

In FIG. 1, reference numeral 1 denotes a storage case for storing thin paper 2, and paper guides 3a and 3b for restricting side end positions of the paper 2 are provided on both sides of the storage case 1, respectively.

A roller shaft 4 is rotatably bridged between the paper guides 3a and 3b, and rubber separation rollers 5a and 5b are attached to the roller shaft 4 at a constant interval.

Arm 6 rotatably attached to paper guides 3a, 3b
Separation claws 7a and 7b are provided at the tips of a and 6b, and the separation claws 7a and 7b have horizontally extending triangular claws so as to lock the corners of the sheet 2.

Next, the operation of the paper separating mechanism will be described with reference to FIG.

FIG. 10 is a perspective view showing a separated state of thin paper.

When the thin paper 2 is automatically fed, when the roller shaft 4 is rotated in the direction of arrow A by a drive source (not shown), the separation rollers 5a and 5b rotate in the same direction, and the separation rollers 5a and 5b are rotated. The uppermost sheet 2 is separated from the lower sheet 2 by the frictional force and is fed in the direction of arrow B.

Then, the sheet 2 is sequentially separated by the separating rollers 5a and 5b while being pushed up by the pushing force from below,
It is paid out.

Here, the separating and feeding operation will be described in detail.
When the paper 2 is delivered by the frictional force of a and 5b, the paper 2
At both corners of the sheet, the liner is blocked by the separating claws 7a and 7b. However, when the repetitive output becomes large, as shown in FIG. Due to the nature, it is elastically deformed into a mountain shape, and the blocking of the row by the separating claws 7a and 7b is released, and only the uppermost sheet 2 is separated and fed out.

[Problems to be solved by the invention]

However, in the paper separating mechanism having the above-mentioned structure, when feeding thick paper such as a postcard with little flexibility, when attempting to separate the thick paper with the separating claw, both corners of the paper are folded in a chevron shape. However, there was a problem that the creases remained and wrinkled, and the quality of the paper deteriorates.

Therefore, this invention was made in view of the above-mentioned problems, and its purpose is to eliminate wrinkles that occur during automatic feeding of thick paper and to prevent deterioration of paper quality. It is to provide a sheet separating mechanism of a sheet feeding device.

[Means for solving problems]

In order to achieve the above object, the present invention provides a pair of sheet stacking plates slidably arranged in the width direction of a sheet, and sheet guides provided upright at outer ends of the sheet stacking sheets. A separating roller mounted on a roller shaft passed between both paper guides so as to be slidable in the width direction of the paper, a push-up plate rotatably provided on the front sides of the paper stacking plates, and both push-up plates. An elastic member arranged so as to push up the plates to bring the uppermost sheets on both the push-up plates and the sheet stacking plates into pressure contact with the separating rollers; and a separating claw for separating the uppermost sheets, In a paper separating mechanism of an automatic paper feeder that separates and feeds the paper one by one by rotation of a separation roller, the separation pawl is a first separation pawl for thin paper, which is provided at each front end of the both paper stacking plates. And the separate feeding of thick paper In addition, the front end of the second separating claw is a second separating claw for thick paper, the tip of which protrudes above the sheet at a position before the first separating claw, and the second separating claw is a rigid member only or a rigid member. The structure is made of a flexible member having a tip projecting upward from the rigid member, and has a mounting screw that is detachably mounted to each of the sheet stacking plates.
The screw holes provided in both the sheet stacking plates for tightening the mounting screws are the sheet guides in which the tips of the second separation claws are provided on the both sheet stacking plates when separating and feeding the thin sheets. It is provided at a position where it can be attached by the attaching screw so as to be located on the outside of the.

[Action]

According to the present invention having such a structure, when thin sheets are separately fed, both the second separating claws are attached by screws so that the tips of the second separating claws are located outside the sheet guides provided on the sheet stacking plate. When attached to the stacking plate, the uppermost sheet of thin paper placed on the push-up plate and the sheet stacking plate is pressed against the separating roller, and the separating roller is rotated, the uppermost sheet is fed out, Along with this, the tip corners of this uppermost sheet are elastically deformed into a chevron shape by the first separating claws,
The uppermost sheet is separated and fed over the first separating claw.

Further, in the case of separating and feeding thick paper, the mounting screws are loosened to remove the second separation claws from the sheet stacking plate, respectively, and the second separation claws are positioned so that their respective tips are in front of the first separation claws. The mounting screw is tightened in the screw hole so as to project above the sheet, and is mounted on the sheet stacking plate.

When the separating roller is rotated while the uppermost sheet of thick paper placed on the push-up plate and the sheet stacking plate is pressed against the separating roller, the uppermost sheet is fed out, and along with this, the uppermost sheet is fed. The leading edge of the sheet of paper is pushed up by the second separating claw, so that the leading edge of the sheet of paper passes over the second separating claw and the topmost sheet is separated and fed.

In this way, the thick separating sheet is separated by the second separating claw, but since the second separating claw can be detached from the sheet stacking plate by the mounting screw, the rigid member can be removed depending on the strength of the thick sheet. Only the structure having only the structure and the structure having the rigid member and the flexible member are selected and attached.

Therefore, according to this, since the thin paper and the thick paper are separated by the dedicated separation claws, respectively, the paper is not folded or wrinkled, and the quality of the paper does not deteriorate.

Further, the second separating claw can be selected from a structure having only a rigid member and a structure having a rigid member and a flexible member according to the stiffness of the thick paper, so that a plurality of types of thick paper can be selected. When it is possible to deal with it and the second separating claw is not used,
In other words, when separating and feeding thin paper, it can be attached to both paper stacking plates with mounting screws so that the leading edge is located outside the paper guide provided on the paper stacking plate, so that careless loss is prevented. You can

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing a paper separating mechanism of an automatic paper feeding device according to an embodiment, and FIG. 2 is a view shown in FIG. 1A- when thin paper is separated and fed.
FIG. 3A is a sectional view taken along line A, and FIG. 3A is FIG. 1A when separating and feeding thick paper.
FIG.

In FIGS. 1 to 3, 11a and 11b are a pair of left and right sheet stacking plates for stacking sheets 2, and a sheet guide 12a for regulating the side end position of the sheet 2 at the outer ends of these sheet stacking plates 11a and 11b. , 12b are integrally provided upright, and the front portions of the sheet stacking plates 11a and 11b are formed at a lower level than the rear portion.

Reference numerals 13a and 13b denote device bodies, and the device body 13a
And 13b, a guide plate 14 is bridged, and guide elements 15a and 15b slidably engaged with the guide plate 14 are provided at the front ends of the sheet stacking plates 11a and 11b. It is slidably supported on the shaft, so that the distance between the sheet stacking plates 11a and 11b can be adjusted.

Reference numeral 17 denotes a roller shaft passed between the apparatus main bodies 13a and 13b.
A and 18b are slidably provided so as to face the push-up plates 19a and 19b, and can be rotated by a drive source (not shown).

The push-up plates 19a and 19b are the paper stacking plates 11a and 11b.
Is mounted on a square shaft 16 which is rotatable so as to project to the front of the sheet through slidable holes, and the sheet stacking plates 11a, 11
The sheet 2 on the push-up plates 19a and 19b is pressed against the separating rollers 18a and 18b by being pushed up by the elastic members 20a and 20b provided between the sheet and the front part of the sheet b.

Reference numerals 21a and 21b denote first separation claws attached to the front ends of the paper guides 12a and 12b.
Reference numerals 1a and 21b are provided with horizontal triangular claws so that thin sheets can be separated.

22a and 22b are sheet stacking plates 1 for feeding thick sheets.
The second separating claws 22a and 22b for thick sheets are attached to the bottoms of the sheets 1a and 11b via the mounting screws 23, and these second separating claws 22a and 22b are opened on the sheet stacking plates 11a and 11b and the push-up plates 19a and 19b. Rectangular through hole 24a,
It vertically projects upward through 24b and 25a, 25b, and its tip is set at a position slightly higher than the lower surface of the separation rollers 18a, 18b.

The second separating claws 22a and 22b are respectively provided with a flexible member 26 such as a polyester film and a rigid member 27 such as a metal plate.
The flexible member 26 has a triangular tip and projects slightly longer than the rigid member 27.

Reference numeral 28 is a lever, and the angular shaft 1 on which the lever 28 is fixed
6, push-up plates 19a and 19b are slidably attached through the square holes, and the push-up plate 19 is operated by operating the lever 28.
By rotating a and 19b counterclockwise against the urging force of the elastic members 20a and 20b and locking them in a horizontal state via a lock portion (not shown), sheets 2 of various sizes and thicknesses can be replaced. There is.

Next, the operation of the sheet separating mechanism having the above configuration will be described.

When separating and feeding thin paper, first, the paper stacking plates 11a and 11b and the separation roller 18 are matched to the size of the paper 2.
Adjust the distance between a and 18b.

Next, as shown in FIG. 2, the mounting screws 23 are removed from the screw holes (not shown) provided at the bottoms of the sheet stacking plates 11a and 11b, respectively, and the second separating claws 22a and 22b are removed from the sheet stacking plates 11a and 11b. Remove.

Then, the tips of the removed second separating claws 22a and 22b respectively have the guide plates 12a and 1b as shown in FIG.
2b so as to be located outside the second separation claw 2 by refastening the mounting screw 23 in the screw hole.
2a and 22b are fixed to the sheet stacking plates 11a and 11b, and the sheet stacking plates 11a and 11b and the push-up plates 19a and 19b are fixed.
A thin sheet 2 is placed on the uppermost sheet 2 and the uppermost sheet 2 is pressed against the separation rollers 18a and 18b.

When the separation rollers 18a and 18b are rotated by a drive source (not shown) in this state, the uppermost sheet 2 is moved forward, and the first separation claws 21a and 21b elastically deform both corners of the sheet 2 into a chevron shape. The upper sheet 2 is reliably separated and fed into one sheet.

4 to 6 are explanatory views showing a separated state of thick paper.

When separating and feeding thick paper such as postcards, the second separation claws 22a and 22b are attached by the mounting screws 23 to the paper stacking plate 1
When fixed to 1a and 11b, the second separating claws 22a and 22b are inserted into the through holes 24a, 24b and 25 as shown in FIG.
a, 25b projecting vertically and the tip of the separating roller 1
It is set at a position slightly higher than the lower surfaces of 8a and 18b.

In this state, as shown in FIG. 4, the separating rollers 18a, 18
When b is rotated by a drive source (not shown), the uppermost sheet 2 is moved forward, and the leading edge of the sheet 2 is lifted by the second separating claws 22a and 22b as shown in FIG.
As shown in FIG. 6, the corner of the sheet 2 is the first separation claw 21.
Thick sheets are reliably separated and fed beyond a and 21b.

The invention is not limited to the above embodiment,
Of course, various modifications are possible.

For example, in this embodiment, the second separating claw has an integrated structure in which a flexible member and a rigid member are stacked, but the invention is not limited to this.
As shown in FIG. 7, the second separation claws 22c and 22d may be composed of only the rigid member 25.

[Effect of device]

As is apparent from the above description, according to the present invention, the separation claw is provided in front of the separation roller for the first thin paper.
And the second separation claw for thick paper, the tip of which protrudes to a position before the first separation claw when set when separating and feeding thick paper. In the case of thin paper, the thin separation paper is separated and fed by the first separation claw similar to the conventional one, and in the case of thick paper, the thick separation paper is separated and fed simply by setting the second separation claw. can do.

Therefore, according to this, since the thin paper and the thick paper are separated by the dedicated separating claws respectively, it is possible to obtain an effect that the paper quality does not deteriorate due to folding or wrinkling.

Further, the second separating claw can be selected from a structure having only a rigid member and a structure having a rigid member and a flexible member according to the stiffness of the thick paper, so that a plurality of types of thick paper can be selected. When the second separation claw is not used, that is, when the thin paper is separated and fed, the front end of the second paper is positioned outside the paper guide provided on the paper stacking plate, and both papers are stacked. Since it can be attached to the plate, it is possible to prevent loss due to carelessness.

Further, by adjusting the distance between the sheet stacking plate and the separation roller, it is possible to immediately deal with sheets of a desired size.

Further, since the second separating claw is set as needed, an effect that a simple mechanism can be obtained is also obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a sheet separating mechanism according to an embodiment, and FIG.
FIG. 1 is a sectional view taken along line AA of FIG. 1 when separating and feeding thin paper, and FIG. 3 is a sectional view taken along line AA of FIG. 1 when separating and feeding thick paper.
4 is a side view showing the separated state, FIG. 5 is a side view showing the separated state, FIG. 6 is a front view showing the separated state, FIG. 7 is a side view showing another embodiment, and FIG. FIG. 9 is a bottom view showing the fixing of the second separation claw at the time of separating and feeding the thin paper, FIG. 9 is a perspective view showing a conventional example, and FIG. 10 is a perspective view showing the separated state of the thin paper. 2 ... Paper 11a, 11b ... Paper stacking plate 12a, 12
b ... Paper guide 13a, 13b ... Device main body 14 ... Guide plate 15a, 15b ... Guide element 16 ... Square shaft 17
... Roller shafts 18a, 18b ... Separation roller 19
a, 19b ... push-up plate 20a, 20b ... elastic member 21
a, 21b ... First separation claws 22a, 22b, 22c,
22d ... Second separation claw 23 ... Mounting screws 24a, 24
b, 25a, 25b ... through hole 26 ... flexible member 27
... Rigid member 28 ... Lever

Claims (1)

[Scope of utility model registration request] 1. A pair of paper stacking plates arranged slidably in the width direction of the paper, paper guides provided upright at the outer ends of the paper stacking plates, and passed between the paper guides. Separation rollers attached to the roller shaft so as to be slidable in the width direction of the sheets, push-up plates rotatably provided on the front sides of the sheet stacking plates, and push-up plates to push up both push-up plates. A plate and an elastic member arranged to press the uppermost sheet on both sheet stacking plates against the separating roller, and a separating claw for separating the uppermost sheet, and the sheet is rotated by the separating roller. In the paper separating mechanism of the automatic paper feeding device for separating and feeding the sheets one by one, the separating claws are the first separating claws for thin sheets and the separating and feeding thick sheets, which are respectively provided at the front ends of the both sheet stacking plates. When sending, the first separation claw The second separation claw for thick paper, the tip of which protrudes above the sheet at a position closer to the front than the other side, and the second separation claw, which is a rigid member only or a rigid member, and the tip of which is higher than the rigid member. The structure is composed of a projecting flexible member, and each has a mounting screw that is detachably attached to both of the sheet stacking plates, and the screw holes provided in the both sheet stacking plates for tightening the mounting screws are the thin sheet. When the sheet is separated and fed, the second separating claw is provided at a position where the tip can be attached by the attaching screw so that the tip of the second separating claw is located outside the sheet guides provided on the sheet stacking plates. The paper separation mechanism of the automatic paper feeder.