JPH06345277A - Paper feed device - Google Patents

Abstract

PURPOSE:To provide a paper feed device which can dissolve deterioration of feeding and separating performance due to inappropriate relative positions between paper feed rollers and a paper sheet and between paper feed rollers and separating means, in the paper feed device provided with the paper feed rollers, the separating means, and side guides. CONSTITUTION:This paper feed device is provided with a paper feed roller interlocking means (racks 28a, 28b, a pinion 29) to interlock the movement of one paper feed roller 40 constituting a pair of paper feed rollers in the width direction of the paper sheet with the movement of the other paper feed roller 40 in the reverse direction, and a side guide interlocking means (racks 31, a pinion 32) to interlock the movement of one side guide 13 constituting a pair of side guides in the width direction of the paper sheet with the movement of the other side guide in the width direction of the paper sheet. In addition, it is provided with a supporting means (sliders 14) to movably support respective separating claws 15 in the width direction of the paper sheet, and the side guides and the separating claws, the side guides and the paper feed rollers are respectively connected together.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a stencil printing machine, a copying machine,
The present invention relates to a sheet feeding device applicable to an image forming apparatus such as a printer.

[0002]

[Prior art]

2. Description of the Related Art: A pair of paper feed rollers that feeds paper in the front-rear direction toward a printing unit, a pair of separation claws that abut both width portions of the front edge of the paper, and a position of the paper relative to the printing unit that contacts both widths of the paper There is a paper feeder having a pair of side guides that define it.

Prior art: A pair of paper feed rollers provided in the main body as an immovable member for feeding the paper in the front-back direction toward the printing section, and a paper feed tray detachably provided in the paper width direction with respect to the main body. The paper feed tray is provided with a paper feed table that is movable in the width direction of the paper and that stacks the paper, and a drive unit that drives the paper feed table in the paper width direction. There is a sheet feeding device having a separating claw that comes into contact with the front end and both width portions of the paper, and a pair of side guides that come into contact with both widths of the paper and position the paper with respect to the printing unit.

Prior art: One sheet feeding separation roller provided in the main body as an immovable member for feeding the sheet in the front-back direction toward the printing section, and sheet feeding detachably provided in the sheet width direction with respect to the main body. The paper feed tray has a tray, is provided with a paper feed table that is movable in the paper width direction and stacks the paper, and a drive unit that drives the paper feed board in the paper width direction. There is a paper feeder having a separation pad and a pair of side guides which contact both widths of the paper and determine the position of the paper with respect to the printing unit.

[0005]

[Problems to be Solved by the Invention]

2. Description of the Related Art: By moving a side guide, when a paper having a different paper width is accommodated, the positional relationship between the separation claw for the paper positioned by the side guide and the feed roller for the paper is also displaced. However, there is a problem in that the separation performance and the paper feeding performance deteriorate, and problems such as paper skew, wrinkles, and double feed occur.

Prior art: When the paper feed table is moved by the drive source in order to correct the positional deviation of the paper with respect to the printing section, the separation claw and side guide also move together with the paper feed table. The positional relationship of the separation claw with respect to the paper roller and the positional relationship of the paper with respect to the paper feeding roller are also displaced,
There is a problem in that the paper feeding performance and the separation performance deteriorate, and problems such as paper skew, wrinkles, and double feed occur.

Prior art: When the paper feed table is moved by the moving means to correct the positional deviation of the paper with respect to the printing unit in the paper width direction, the separation pad and the side guide also move together with the paper feed table. The positional relationship of the separation pad with respect to the paper separation roller and the positional relationship of the paper with respect to the paper feed separation roller are also misaligned, which deteriorates the paper feeding performance and the separation performance, and causes problems such as paper skew, wrinkles, and double feeding. There is.

It is an object of the present invention to provide a paper feeding device capable of eliminating the deterioration of the paper feeding and separating performance due to the positional mismatch between the paper feeding roller and the paper and the paper separating means.

[0009]

In order to achieve the above object, the present invention has the following constitution.

(1). A pair of paper feed rollers that forms a pair of paper feed rollers and a pair of paper feed roller interlocking means for interlocking movement of the other paper feed roller in a direction opposite to the direction in which the paper width direction moves. Side guide interlocking means that interlocks the movement of one side guide in the paper width direction with the movement of the other side guide in the paper width direction, and each separation claw is movable in the paper width direction. Supporting means for supporting the side guide and the separating claw, and the side guide and the paper feed roller are connected to each other (claim 1).

(2). Paper feed roller interlocking means for interlocking movement of the other paper feed roller in a direction opposite to the direction in which the one paper feed roller that constitutes a pair of paper feed rollers moves in the paper width direction, and a paper feed roller Along with this, the paper feed roller movable support means for movably supporting the paper feed roller interlocking means in the paper width direction and the movement of one side guide constituting the pair of side guides in the paper width direction of the other side guide. It has side guide interlocking means for interlocking with the movement in the paper width direction, and support means for movably supporting each separation claw in the paper width direction. The positional relationship between the side guides and the paper feed rollers and the paper feed roller position holding means that holds the positional relationship between the paper tray and the movable support means for the paper feed roller without hindering the operation of removing the paper feed tray from the main body Removal operation of the paper tray Provided a paper feed tray position holding means for holding without interfering (claim 2).

(3). The paper feed / separation roller moving means that supports the paper feed / separation roller movably in the width direction of the paper, and the movement of one side guide constituting the pair of side guides in the paper width direction of the other side guide. Side guide interlocking means that interlocks with movement in the paper width direction, and paper feed separation roller position holding that holds the positional relationship between the paper feed tray and paper feed separation rollers without hindering the operation of removing the paper feed tray from the main body And means are provided (Claim 3).

[0013]

Since the paper feed roller also moves as the side guide moves, the relative displacement of the paper feed roller with respect to the side guide does not occur.

[0014]

【Example】

1. Printing Apparatus Suitable for Implementing the Present Invention An example of a printing apparatus suitable for implementing the present invention will be described with reference to FIG. In FIG. 4, a paper feeding device 2 is provided below the printing device 1.
Are arranged. The paper feeding device 2 has a paper feeding tray 3 that can be pulled out by being guided by a tray slide guide 30 in the width direction of the paper which is a direction that penetrates the paper surface of the drawing, that is, in the left-right direction.

A paper feed tray 4 is arranged inside the paper feed tray 3. The paper feed table 4 can be moved in the width direction of the paper by a moving unit (not shown). The paper feed table 4 includes a paper feed bottom plate 6 for bringing the paper P into contact with the paper feed roller 40, and a lifting mechanism (not shown) such as a support bracket 7 for supporting the pivot shaft thereof.

On the front plate in the front-back direction of the paper feed table 4,
Separation claws 15 are arranged at positions corresponding to both leading ends of the sheet P.

The flow of the paper P during printing will be described.
First, when a paper feed command is input from the printing apparatus 1, the paper feed bottom plate 6 rises, both ends of the paper P are caught by the separation claw 15, and
The paper P is stopped at a position in the vertical direction so that the paper P can be sent out when the paper feed roller 40 rotates.

Next, the paper feed roller 40 rotates, the paper P is sent out, and the paper P is separated into one sheet by the separating claw 15 and is conveyed to the conveying roller 41. The sheet P travels along the transport path 42 by the transport roller 41 and is transported to the registration roller 43 of the printing apparatus 1.

The sheet P is temporarily stopped by the registration roller 43, is registered again, and is then re-conveyed.
The printing pressure roller 45 presses the outer peripheral surface of the drum 44 around which the plate-making base paper is wound. As a result, the image on the base paper is transferred to the paper P, and the suction unit 46 causes the drum 4 to move.
The sheets are separated from the sheet No. 4 and provided with a waist for improving the sheet discharge alignment, and the sheets are discharged onto the sheet discharge tray 47.

In one case, one paper feed roller 40 is provided so as to be aligned with the center of the drum 44 in the left-right direction, and in some cases, a pair (two) is provided so as to be distributed from the center.

Here, when the size of the paper P is changed, the side guides that open and close on the basis of the center are adjusted to match the width of the changed paper. In this case, if the position of the separation claw 15 or the position of the pair of paper feed rollers 40 is not changed in accordance with the change of the paper size, the positional relationship between the separation claw for the paper and the paper feed roller for the paper becomes incorrect, and the paper feeding or the separation is performed. The decrease in performance is as described in the problem of the prior art.

When printing as described above,
When it is desired to move the print image position in the paper width direction orthogonal to the front-rear direction which is the paper feed direction, the left and right movement keys or the left and right movement dials or the like (not shown) cause the movement means to function to move the paper feed table 4 to the guide shaft. Move to the left and right along 5. As a result, the image position on the paper P can be adjusted to the desired proper position.

In this alignment work, the separation claws and the side guides move together with the paper feed tray with respect to the paper feed roller whose installation position is immovable because it is provided on the main body side which is the immovable member. Due to the movement of the paper feed table, the relationship between the position of the separation claw with respect to the paper feed roller and the position of the paper with respect to the paper feed roller is deviated, and the paper feed separation performance is deteriorated. This was mentioned in the prior art issue.

As a paper separating method, there is a method other than the above-mentioned method relating to a combination of a paper feeding roller and a separating claw, for example, a paper feeding separating roller method.

In this paper feed separation roller system, a paper feed separation roller having not only a paper feed function but also a paper separation function is used by appropriately selecting the friction coefficient of the paper feed roller, and
The separation pad is provided on the paper feed table 4 in correspondence with the paper feed roller.

In this paper feed separation roller system, one sheet is separated and sent out by utilizing the difference in friction coefficient between the paper feed separation roller or the separation pad and the paper.

In this paper feed separation roller system, when the paper feed table 4 is moved in the left-right direction to move the print image position, the separation pawl is not used. However, the problem of positional deviation between the paper feed separation roller and the paper, and between the paper feed separation roller and the separation pad occurs. This was mentioned in the prior art issue.

2. Example corresponding to claim 1 and claim 2 (see FIGS. 1 and 2) FIG. 2 is a view of the sheet feeding tray 3 of the sheet feeding device 2 shown in FIG.
FIG. 1 is a view seen from the direction of arrow B in FIG. In FIG. 2, a paper feed tray 4 is provided inside the paper feed tray 3 and is structured to be movable in the left-right direction.

The structure of the moving means that enables this movement will be described. Two guide shafts 5, which have screws on the left side and which are supported by bearings on the front and rear side plates of the paper feed tray 3 and are long in the left-right direction, are arranged facing each other with a space in the front-rear direction.

A guide block 8 is screwed onto the threaded portions of these guide shafts 5, 5. A slide block 9 is inserted through the bearings on the right side in the left-right direction of the guide shafts 5, 5.

The guide block 8 and the slide block 9 are fixed to the bottom of the paper feed table 4, respectively.

On the other hand, pulleys are fixed to the two guide shafts 5 and 5, respectively. A worm wheel 11 is fixed to one guide shaft 5, and the driving force of the left-right drive motor 12 rotates one guide shaft 5 via the worm 11a and the worm wheel 11.

Transmission of the driving force to the other guide shaft 5 is carried out by a transmission belt 10 wound around pulleys fixed to both guide shafts as shown in FIG.

With this configuration, when the left and right drive motor 12 is driven, the two guide shafts 5 and 5 rotate, the guide block 8 moves, and the paper feed table 4 fixed to the guide block 8 moves in the left and right direction. Will be moved to.

Bending piece-shaped support brackets 7, 7 are fixed to the paper feed table 4 so as to face each other with a space therebetween. The I-shaped paper feed bottom plate 6 has pins 7a attached to these brackets 7,7.
Is pivoted through.

Thus, the sheet feeding bottom plate 6 can be moved up and down by an elevating mechanism (not shown) so as to bring the sheet on the sheet feeding bottom plate into contact with or release the sheet feeding roller or separation claw.

As shown in FIGS. 1 and 2, the paper feed base 4 is provided with a pair of side guides 13, 13 which are in contact with both widths of the paper and define the paper position with respect to the printing unit so as to be openable and closable.
These side guides 13 and 13 are integrated with slide pieces (not shown) fitted in the long holes 4n and 4n formed in the paper feed table 4, and can be moved in the left-right direction by being guided by the long holes.

On the back side of the paper feed table 4, racks 31, 31 are provided integrally with the slide piece. These racks 31, 31 are commonly meshed with a pinion 32 pivotally supported by the paper feed table 4, and can be moved in the left-right direction with respect to the paper feed table 4 by guide means (not shown).

Therefore, when one of the side guides 13 is moved in the left-right direction, the other side guide 13 is also interlocked with the other side guides 13 to move in opposite directions to perform the opening / closing operation. In this way, the movement of one side guide in the paper width direction can be interlocked with the movement of the other side guide in the paper width direction. Therefore, the racks 31, 31 and the pinion 32 are referred to as side guide interlocking means.

In FIG. 2, as shown by reference numerals 3a and 3a, the front plate of the paper feed tray 3 is formed with a long hole which is long in the left-right direction. Two guide pins 14a are slidably fitted in the elongated holes 3a, 3a, respectively. Sliders 14, 14 are fixed to these guide pins 14a.

Separation claws 15 are provided on the sliders 14 and 14 so as to be vertically movable. Each slider 14, 14
Is guided by the long holes 3a, 3a and the guide pins 14a, 14a and is slidable in the left-right direction. Therefore, the sliders 14 and 14 are supporting means for movably supporting the separation claws 15 and 15 in the paper width direction.

The racks 31, 31 and the sliders 14, 14 are connected by connecting brackets 16, 16. As a result, the side guides 13, 13 and the separation claw 1 are substantially formed.
The side guides 1 and 5 are now connected.
When moving 3,13, the separation claw 1 interlocks with the movement.
5,15 will also move.

Next, the sheet feeding side plate 20 and the sheet feeding side plate 21 are located at a distance from the main body as a stationary member. A paper feed shaft 34 extending in the left-right direction is fixed to the paper feed side plate 20 and the paper feed side plate 21.

Further, in parallel with the paper feed shaft 34, the front paper feed side plate 20 is provided.
A prismatic stay 22 is fixed to the paper feed side plate 21. A paper feed roller guide bracket 23 having a substantially U-shaped cross section is fitted to the stay 22. The paper feed roller guide bracket 23 is slidable in the left-right direction.

As shown in FIG. 2, the left end portion of the paper feed roller guide bracket 23 is bent downward. This bent portion is referred to as a stopper portion and is indicated by reference numeral 27. The stopper portion 27 is in a relationship of interfering with the side portion of the sheet feeding table 4.

A pin is planted at the other end of the paper feed roller guide bracket 23, and a elastic spring 35 is hung between the pin and the front paper feed side plate 20. Due to the elasticity of this spring, the paper feed roller guide bracket 23 is pulled rightward, and the paper feed roller guide bracket 2 is pulled by the pulling.
The movement of 3 is prevented by the stopper portion 27 coming into contact with the sheet feeding table 4.

Since the stopper portion 27 presses the paper feed tray 4 only from one direction by the spring 35, the paper feed tray 4 and the paper feed tray 3 are attached to and detached from the main body side. It does not hinder the operation.

A pair of paper feed rollers 40, 40 are slidably mounted on the paper feed shaft 34 via guide members 33, 33. For example, the paper feed shaft 3 having a hexagonal outer shape portion in the inner diameter portion of the hexagonal hole formed in the guide members 33, 33.
4 is slidably fitted.

When the paper feed shaft 34 is formed of a round bar, the same operation is realized by interposing a one-way clutch inside the guide member 33. Paper feed rollers 40, 40 are provided on the outer diameter portions of the guide members 33, 33.

One end of the left paper feed roller guide 24 is engaged with the left guide member 33, and the right guide member 33.
The right side paper feed roller guide 25 is engaged with one end thereof.

The other end of the left paper feed roller guide 24 intersects with the paper feed roller guide bracket 23. At this intersection, the protruding portion of the guide pin 24a planted in the paper feed roller guide 24 is slidably fitted in a long hole 23a formed in the paper feed roller guide bracket 23 and long in the left-right direction.

Similarly, the protruding portion of the guide pin 25a planted in the paper feed roller guide 25 is slidably fitted in a long hole 23b formed in the paper feed roller guide bracket 23 and extending in the left-right direction. .

A rack 28a is provided on the back side of the paper feed roller guide bracket 23 and at a position overlapping the guide pin 24a.
Is slidably supported in the left-right direction. Similarly, a rack 28b is provided slidably in the left-right direction at a position overlapping the guide pin 25a.

These racks 28a and 28b are commonly meshed with a pinion 29 axially mounted on the paper feed roller guide bracket 23.

As a result, when one paper feed roller 40 is moved, the other paper feed rollers 40 are also moved, and the movement direction thereof is opposite to the movement direction of one paper feed roller. That is, the movement of one sheet feeding roller 40 is in a relation with the movement of the other sheet feeding roller 40. Therefore, the racks 28a, 2
8b and the pinion 29 are referred to as a paper feed roller interlocking device.

Since the stay 22 and the paper feed roller guide bracket 23 movably support the paper feed rollers 40, 40 in the paper width direction, they are referred to as paper feed roller movable support means.

A connecting magnet 26 is attached to the left end of the left paper feed roller guide 24, and the connecting magnet 26 is in a positional relationship of interfering from the left side of the left side guide 13 made of a magnetic material.

As a result, under the condition that the paper feed tray 3 is attached to the main body, the left paper feed roller guide 24 is held in a state of being attracted to the left side guide 13 by the magnetic attraction force. ing. Therefore, the left paper feed roller guide 24 has a relationship of moving following the movement of the side guide 13.

Here, since the left paper feed roller guide 24 and the right paper feed roller guide 25 are in a relationship of interlocking with each other by the paper feed roller interlocking means, depending on the adjustment of the width between the side guides 13, 13. The size between the pair of paper feed rollers 40, 40 also changes.

In the above, the stopper portion 27 is attached to the spring 3
The paper feed tray 3 is configured so that the paper feed tray 4 is brought into contact with the paper feed tray 3.
And the paper feed roller guide bracket 23 as the paper feed roller movable supporting means, and by extension, the positional relationship between the paper feed rollers 40, 40,
Since the paper feed tray can be held without hindering the removal operation of the paper feed tray from the main body, such a component is referred to as a paper feed roller position holding means.

Further, the connecting magnet 26 provided on the left paper feed roller guide 24 so as to interfere with the one side guide 13 causes the positional relationship between the side guide 13 and the paper feed roller 40 to be fed from the main body to the tray. Since it can be held without hindering the pulling-out operation of No. 3, such a constituent portion is referred to as a paper feed tray position holding means.

The spring structure of the paper feed roller position holding means may be a magnet similar to the connecting magnet of the paper feed tray position holding means, or the structure of the connecting magnet of the paper feed tray position holding means may be changed. It is also possible to use a spring similar to the spring in the paper feed roller position holding means.

(1) Summary and Advantages of Structure According to Claim 1 It has a paper feed roller interlocking means, a side guide interlocking means, and a separation pawl moving support means, and the side guide, the separation pawl and the side guide Since the configuration is such that the paper roller is connected, even if the size of the paper is changed, the feed roller and separation claw move in conjunction with the paper size, and the positions of the paper feed roller and separation claw relative to the paper always change. Therefore, it is possible to prevent the paper feeding performance and the separation performance from deteriorating. In addition, it is inexpensive because it does not require detection of the paper size and electrical control, and it is easy because the operation is automatic.

(2) Summary and Advantages of Structure Corresponding to Claim 2 Paper feed roller interlocking means, paper feed roller movable support means, side guide interlocking means, separation claw movement support means, and paper feed roller position holding Since the side guide and the separating claw are connected to each other, the sheet feeding tray can be moved without changing the positions of the sheet feeding roller and the separating claw. The position of the paper with respect to the printing unit can be adjusted, and the positional relationship between the separation claw and the paper with respect to the paper feed roller does not shift even when the paper tray is detached from the main body.

3. Example corresponding to claim 3 This example will be described with reference to FIG. This example is similar to the example according to FIGS. 1 and 2 described in the example corresponding to claim 2, and the sheet feeding method is different.

That is, in the example according to FIGS. 1 and 2, the number of the paper feed rollers is two, but in the present example, one is provided at the center of the paper and has both the paper feeding function and the paper separating function. It is a thing. Therefore, it is referred to as a paper feed separation roller and is denoted by reference numeral 400.

In the paper separation method, a separation pad is provided on the paper feed table 4 so as to face the paper feed separation roller 400, and the difference in friction coefficient between the separation pad, the paper, and the paper feed separation roller is used to make the paper separation. The method of separating and sending each one is adopted.

Since only one paper feed separation roller 400 is provided, the paper feed roller interlocking means as in the above example is unnecessary and is not provided. Further, there is not provided a paper feed tray position holding means for holding the positional relationship between the side guide and the paper feed roller.

The other points are in accordance with the configuration described in FIGS. 1 and 2, and members having the same function are indicated by the same reference numerals as in FIGS. 1 and 2 in FIG. There is.

The moving means for moving the paper to the left and right in relation to the printing section is fed by the driving force of the left and right moving motor 12 through the worm 11a, the worm wheel 11, the guide shaft 5, the guide block (not shown) and the like. The paper table 4 is moved.

Although not shown, the separation pad is provided on the front plate of the paper feed tray 4 at a position corresponding to the center of the paper and is integral with the paper feed tray 4, so the paper feed tray 4 is not shown. Even if is moved, it will always be located in the center of the paper.

The paper feed separation roller 400 is inserted by a paper feed shaft 34 provided on the main body side, is slidable in the left-right direction, and is supported on one end side of the paper feed roller guide 24 '.

Here, a one-way clutch is provided in the inner diameter portion of the sheet feeding / separating roller 400, and when the sheet feeding shaft 34 rotates in the sheet feeding direction, the sheet feeding / separating roller 400 is kept in the same state. Rotate.

The other end of the paper feed roller guide 24 'is slidably fitted in a left-right long stay 22 provided on the main body side, and is guided to an elongated hole 22a formed in the left-right direction. It is supposed to be done.

A connecting magnet 260 is fixed to the left end of the paper feed roller guide 24 ′, and the connecting magnet 260 can be attracted to the left side portion of the paper feed table 4. Under the condition that the paper feed tray 3 is attached to the main body, the connecting magnet 260 is attracted to the paper feed table 4 by a magnetic attraction force to be integrated, and follows the movement of the paper feed table 4. Will move.

Further, when the paper feed tray 3 is pulled out from the main body, the attraction by the magnetic attraction force between the connecting magnet 260 and the paper feed table 4 is only released by an external force, and they are mechanically connected. It doesn't mean that it doesn't hinder the removal operation. Paper feed roller guide 2 instead of the connecting magnet 260
Alternatively, 4'may be pulled rightward by a spring.

Here, the elongated hole 22a constitutes a part of the sheet feeding / separating roller moving means, and supports the sheet feeding / separating roller 400 so as to be movable in the width direction of the sheet.

Therefore, even when the paper feed tray 4 is moved in the left-right direction using the moving means for position adjustment with the printing unit in order to adjust the image forming position on the paper, the paper feed tray 4
The positional relationship between the sheet feeding roller 400 and the sheet feeding roller 400 does not shift. In that case, since the separation pad is provided on the paper feed table 4, the positional relationship between the separation pad and the paper feed separation roller 400 does not shift.

The connecting magnet 260 constitutes a paper feed roller position holding means for holding the positional relationship between the paper feed tray 3 and the paper feed separation roller 400 without hindering the operation of removing the paper feed tray 3 from the main body. ing.

The pair of side guides 13, 13 is provided with side guide interlocking means for interlocking the movement of one side guide in the paper width direction with the movement of the other side guide in the paper width direction. There is.

The side guide interlocking means has the same structure as the rack 31 and the pinion 32 in FIG.
In order to avoid complexity, illustration is omitted in FIG.

In this example, since the paper feed separation roller and the separation pad are always positioned in the center of the paper even when the paper is moved left and right, it is not necessary to manually adjust the position of the paper feed separation roller. There is no deterioration in separation performance.

[0083]

As described above, according to the present invention, it is possible to eliminate the deterioration of the paper feeding / separating performance due to the positional mismatch between the paper feeding roller and the paper / paper separating means.

[Brief description of drawings]

FIG. 1 is a plan view of a paper feeding device illustrating an embodiment of the present invention.

FIG. 2 is a front view of the sheet feeding device according to the embodiment of the present invention.

FIG. 3 is a plan view of the sheet feeding device according to another embodiment of the present invention.

FIG. 4 is a diagram illustrating an outline of a printing apparatus suitable for implementing the present invention.

[Explanation of symbols]

3 Paper feed tray 4 Paper feed table 11 Worm wheel 11a (as a moving means) Worm 12 (Warm as a moving means) Left and right moving motor 13 Side guide 14 Slider 15 (as a supporting means) 15 Separation claw 22 stay 22a (as a paper feeding roller movable supporting means) 22a (as a paper feeding separation roller moving means) 23 hole (as a paper feeding roller movable supporting means) paper feeding roller guide bracket 24 '(as a paper feeding roller moving means) Paper feed roller guide 26 Connection magnet 27 (as paper feed tray position holding means) Stopper portion 28a (as paper feed roller position holding means) Rack 28b (paper feed roller interlocking means) Rack 29 (as a paper feed roller interlocking means) 31 pinion (as a side guide interlocking means) 3 (Side guide as interlocking means) pinion 35 (feeding of the roller position holding device) spring 260 (as paper separation roller position holding device) connected magnet 40 paper feed roller 400 paper separation roller

Claims (3)

[Claims] 1. A pair of paper feed rollers for feeding a sheet in a front-back direction toward a printing section, a pair of separating claws for abutting both width portions of a front end of the sheet, and a sheet position relative to the printing section in contact with both widths of the sheet. And a pair of side guides that define the other side guides that define the other side feed guides. A paper feed roller interlocking device that interlocks the movements of the paper rollers, and the movement of one side guide constituting the pair of side guides in the paper width direction is interlocked with the movement of the other side guide in the paper width direction. A side guide interlocking device for supporting the separation claws and a support device for movably supporting the separation claws in the paper width direction, and connecting the side guides and the separation claws, and the side guides and the paper feed rollers, respectively. Paper feeding device characterized by Place 2. A pair of paper feed rollers, which are provided in the main body as an immovable member and send out paper in the front-back direction toward the printing section, and a paper feed tray detachably provided in the paper width direction with respect to the main body. The paper feed tray is provided with a paper feed table that is movable in the width direction of the paper and that stacks the paper, and a moving unit that moves the paper feed table in the paper width direction. Separation claws that contact the front edge of the paper and both width parts,
In a paper feeding device provided with a pair of side guides for contacting both widths of the paper and determining the position of the paper with respect to the printing unit, one paper feeding roller forming the pair of paper feeding rollers moves in the paper width direction. Paper feed roller interlocking means for interlocking the movement of the other paper feed roller in the opposite direction to that of the paper feed roller, and a paper feed roller for movably supporting the paper feed roller interlocking means together with the paper feed roller in the paper width direction. Movable support means, side guide interlocking means for interlocking movement of one side guide constituting the pair of side guides in the paper width direction with movement of the other side guide in the paper width direction, Support means for movably supporting the separation claws in the width direction of the sheet, connecting the side guides and the separation claws with each other, and positioning the paper feed tray and the paper feed roller movable support means. Relationship to the body The paper feed roller position holding means for holding the paper feed tray without removing the paper feed tray, and the positional relationship between the side guides and the paper feed rollers prevent the paper feed tray from being removed from the main body. And a paper feed tray position holding means for holding the paper feed tray without holding the paper feed tray position holding means. 3. A sheet feeding / separating roller provided on the main body as an immovable member for feeding the sheet in the front-back direction toward the printing section, and a sheet feeding tray detachably provided on the main body in the sheet width direction. The paper feed tray is provided with a paper feed table that is movable in the width direction of the paper and that stacks the paper and a moving unit that moves the paper feed table in the paper width direction. In a paper feeding device provided with a separation pad and a pair of side guides that contact both widths of the paper and determine the position of the paper with respect to the printing section, the paper feeding and separating roller is movably supported in the width direction of the paper. A sheet feeding / separating roller moving means, and a side guide interlocking means for interlocking the movement of one side guide constituting the pair of side guides in the paper width direction with the movement of the other side guide in the paper width direction. , The paper tray and front Sheet feeding apparatus characterized by having a paper separation roller position holding means for holding without disturbing the positional relationship between the paper separation roller the pull-out operation of the sheet feed tray from the main body.