JPH0967024A - Image recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image recording device capable of carrying out sure separation and feeding even by a friction separating and feeding means which is an inexpensive and simple separating and feeding means irrespective of miniaturization of an image recording device body, and prevents defective separation or feeding even when the loaded amount of the sheets on a sheet loading table becomes small. SOLUTION: An angle of inclination of a sheet loading table 7 is provided in a variable manner, a first angle at the sheet loading table 7 in which the moving region of an original table 6 crosses the sheet loading table 7 and a second angle at the sheet loading table 7 in which the moving region of the original table 6 does not cross the sheet loading table 7 are provided, and oscillation can be realized at least step by step, or continuously between the first angle and the second angle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable document table type image recording apparatus which reads a document image by moving a document table on which a document is placed and records the document image on a sheet in an image forming section. is there.

[0002]

2. Description of the Related Art Conventionally, an electrophotographic apparatus as an image recording apparatus for reading an image of a document and recording it on plain paper as a sheet, a so-called copying machine, is roughly classified into two document reading systems.

One is a fixed platen type in which an original is fixed to the main body of a copying machine and an optical unit such as an illumination lamp or a reflection mirror is moved to perform slit exposure on a photosensitive medium.
The other is a movable platen type in which an optical system for exposure is fixed and a platen on which a document is placed is moved to perform slit exposure on a photosensitive medium.

The former fixed document table type copying machine can perform stable optical scanning regardless of the weight of the original, and can cope with the variable magnification optical system relatively easily. However, the structure is complicated and expensive, and the latter moving platen type is suitable for reducing the size and weight of the copying machine body.

FIG. 7 is a vertical sectional view of a conventional manuscript table moving type small copying machine as an image recording apparatus.

Reference numeral 101 is a photosensitive drum, 102 is a registration roller, 103 is a paper feed roller, 104 is a separation pad, 10
Reference numeral 5 is an intermediate plate, 106 is a document table, 107 is a sheet feeding tray as a sheet stacking table, and 108 is a recording sheet as a sheet.

When an unillustrated original is placed on the original table 106 and a recording sheet 108 is placed on the paper feed tray 107 and a copy start switch (not shown) is turned on, the original table 106 moves in the direction of 106 "shown by the dotted line. .

At this time, the intermediate plate 105 rotates clockwise in the drawing around the rotary shaft 105a to press the bundle of recording papers 108 against the paper feed roller 103. The paper feed roller 103 rotates clockwise in the drawing to send out the uppermost paper of the bundled recording papers 108, but not only the uppermost paper but the next recording paper 108.
In case of double feeding, the next paper is blocked due to the frictional resistance of the separation pad 104 provided in pair with the paper feed roller 103, and only the uppermost paper separated into one is fed. Become.

Such a separate feeding system is called a "friction separating feeding system" and is known as an inexpensive separating feeding means. The recording sheets 108 thus stacked on the sheet feeding tray 107 are fed into the main body of the copying machine.

Recording paper 10 separated and fed into one sheet
Reference numeral 8 strikes the registration roller 102, and the registration roller 102 rotates while timing with the original table 106 which is folded back from the position 106 ″ to the right in the drawing, and the image of the original is copied onto the recording paper 108 by a known electrophotographic process. , Transported.

[0011]

However, in this conventional example, as can be seen from FIG. 7, the paper feed tray 107 has a portion 107b where the inclination angle is substantially horizontal from the middle.
have. This is because the size of the copying machine in the height direction becomes smaller as the size of the copying machine becomes smaller. As a result, the movable original platen 106 and the paper feed tray 107 have a folded shape so that they do not intersect each other. is there.

Further, although it is difficult to judge only from FIG. 7, in the copying machine before this conventional example, the dimension in the height direction was large and the inclination angle of the paper feed tray was made steeper.

As described above, when the main body of the copying machine is downsized and the inclination angle of the paper feed tray 107 is shallow, it is difficult to separate the friction of the paper feed, and the probability that the recording paper 108 is double-fed increases.

Further, when the paper feed tray 107 is inclined in the middle of the paper feed tray 107 and is inclined at a near horizontal angle, the weight of the recording paper 108 loaded on the paper feed tray 107 becomes smaller and the weight of the paper feed tray 107 becomes smaller than that of the paper feed tray 107. There is a separation pad 1
Even if it does not go down to the root of No. 04 and is lifted by the intermediate plate 105, the leading edge of the recording paper does not reach the paper feed roller 103, or the pressure contact force is insufficient, leading to paper feed failure.

The present invention has been made to solve the above-mentioned problems of the prior art, and the purpose thereof is to:
Irrespective of the downsizing of the main body of the image recording apparatus, the friction separating / feeding means, which is an inexpensive and simple separating / feeding means, ensures reliable separation / feeding, and the separation / feeding is performed even when the stacking amount on the sheet stacking table is reduced. An object of the present invention is to provide an image recording device that does not cause a feeding failure.

[0016]

In order to achieve the above object, according to the present invention, an original image is read by moving an original table on which an original is placed, and the original image is read by a sheet in an image forming unit. An image recording apparatus for recording a sheet, comprising: a sheet stacking table for stacking sheets for recording a document image; and friction separating and feeding means for feeding the sheets one by one to the image forming section. The inclination angle of the table is variably provided, and the first angle in the sheet stacking table where the moving area of the document table intersects the sheet stacking table and the first angle in the sheet stacking table where the moving area of the document table and the sheet stacking table do not intersect. It is characterized in that it has two angles and can be rocked at least stepwise or continuously between the first angle and the second angle.

The first angle is an inclination angle of the sheet stacking table when the sheets stacked on the sheet stacking table are frictionally separated and fed to the image forming section, and the second angle is the document table. Is a slant angle of the sheet stacking table that does not intersect with the sheet stacking table even when is moved.

The sheet stacking table is constantly urged to the first angle by the urging means, and the document table crosses the sheet stacking table located at the first angle by the document reading operation. The sheet stacking base is tilted to the second angle when the sheet is moved to the area.

The position detecting means of the document table, the driving means for inclining the sheet stacking table to the second angle, and the information from the position detecting means are used to judge whether the document table and the sheet stacking table cross each other. In that case, control means for operating the drive means is provided.

Sliding members are respectively provided on the sheet stacking table side end of the document table and the sheet stacking table, and the sliding member of the document table slides on the sheet stacking table as the document table moves. It is characterized in that the sheet stacking base is tilted at the second angle by advancing while slidingly contacting the member.

An end of the document table on the sheet stacking table side;
It is characterized in that a cushioning member is provided between the sheet stacking table and the sliding member on the end side.

It is characterized in that the sheet stacking base is provided with a sheet turning-over preventing portion, and the turning-up preventing portion is provided with a sliding member which is in sliding contact with the sliding member of the original table.

The friction separating / feeding means has a rotary friction member, a driving means for rotationally driving the rotary friction member, and a power transmission for intermittently transmitting the driving force of the rotary friction member to the sheet stacking table. 1 cycle in which a member and a transmission means for transmitting power to the power transmission member at the time of starting rotation of the rotary friction member are provided, and the power transmission member is separately fed by the rotary friction member by the transmission means. Is transmitted to reciprocally rotate the sheet stacking base between the second angle and the first angle.

In the image recording apparatus having the above structure, since the sheet stacking table can be swung at the second angle at which the moving area of the document table and the sheet stacking table do not intersect with each other, regardless of downsizing of the apparatus main body. The sheets can be separated and fed by the friction separating and feeding means.

Further, the first angle is set to the inclination angle of the sheet stacking table when the sheets stacked on the sheet stacking table are frictionally separated and fed to the image forming section, so that the small image recording of the movable table can be performed. In the apparatus as well, the sheet stacking table can be secured at the first angle suitable for separation and feeding regardless of the distance between the document table and the sheet stacking table, so that the inexpensive friction separating and feeding means can surely separate and feed the sheet. Can be sent.

Further, since the sheet stacking base can always be secured at the first angle suitable for separation and feeding by the urging force of the urging means, double feeding can be eliminated even with inexpensive friction separation and feeding means, and Since the leading edge of the sheet is always positioned with respect to the separating / feeding means by the weight of the stacked sheets, the separating / feeding can be performed reliably without causing the non-feeding.

Then, according to the information of the position detecting means of the document table, the control means drives the sheet stacking table by the driving means so as not to intersect with the document table and swings to the second angle. Make sure you don't cross.

Further, since the sliding member on the document table side and the sliding member on the sheet stacking table side are slid in accordance with the movement of the document table to swing the sheet stacking table at the second angle, The impact when the sheet stacking table is swung can be reduced. Therefore, it is possible to reduce the positional deviation of the sheet.

Further, by providing a cushioning member between the end of the platen and the slide member on the platen side, when the slide member on the platen side and the slide member on the sheet stacking table slide, the stick Even if vibration such as slip occurs, the vibration can be absorbed, so that the vibration is not transmitted to the document table or the apparatus main body. As a result, good image formation can be obtained without causing image blur.

Further, a sheet turning-over preventing portion is provided on the sheet stacking table, and a sliding member which makes sliding contact with the sliding member of the original table is provided on the turning-up preventing section, so that the stacked sheets are swung by the sheet loading table. Disturbance can be prevented.

When the rotation friction member of the friction separating / feeding means starts to rotate, the power transmitting member is separated and fed by the rotating friction member by the transmitting means for transmitting power to the power transmitting member to the sheet stacking table. Transmit 1 cycle of power,
By reciprocally rotating the sheet stacking base between the second angle and the first angle, the sheet stacking base can be tilted to the first angle only during separation and feeding, so there is no problem of vibration. A separate feeding operation and good image formation can be obtained.

[0032]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1) FIG. 1 shows a basic structure of a small copying machine as an image recording apparatus according to an embodiment of the present invention.

This compact copying machine is an original table moving type image recording apparatus which reads an original image by moving an original table on which an original is placed and records the original image on a sheet in an image forming section.

In the figure, 1 is a photosensitive drum, 2 is a registration roller, 3 is a paper feed roller, 4 is a separation pad, 5 is an intermediate plate, 6 is a document table, 7 is a paper feed tray, and 8 is a recording sheet as a sheet. Represents

The paper feed tray 7 forms a sheet stacking base on which recording papers 8 are stacked.

A friction separating and feeding means for separating and feeding the plurality of recording sheets 8 on the sheet feeding tray 7 one by one from the sheet feeding roller 3, the separating pad 4 and the intermediate plate 5 to the photosensitive drum 1 side. Is made.

The paper feed roller 3 is a rotary friction member, and the separation pad 4 is a separation friction member which is pressed against the paper feed roller 3. The middle plate 5 is for pressing the recording paper 8 against the paper feed roller 3 by rotating to the paper feed roller 3 side.

A document is placed on the document table 6 and is movable in the left-right direction in the drawing.

Further, the paper feed tray 7 is provided in the main body of the copying machine.
The inclination angle is variable with respect to the friction separating and feeding means, and the friction separating and feeding means is swingably attached.

The paper feed tray 7 shown by the solid line in the figure is at the "first angle" intersecting the moved document table 6 ', and is in the inclined state most suitable for paper feeding. The platen 6'shown by the chain double-dashed line shows the end position in the document reading process, and the platen 6 "shown by the dotted line shows the reading start position.

Therefore, the paper feed tray 7 is at the first angle between the original position of the document table 6 (the position shown by the solid line in FIG. 1) and the document reading start position 6 ", and When passing through the home position and proceeding in the 6'direction, the paper feed tray is rotated to the "second angle" of 7'shown by the chain double-dashed line and the document table 6'and the paper feed tray 7'will not intersect. Absent.

As described above, since the paper feed tray 7 can be swung at the second angle at which the moving area of the document table 6 and the paper feed tray 7 do not intersect, the recording paper 8 is irrelevant regardless of the downsizing of the main body of the copying machine. Can be fed by friction separation.

The recording paper 8 separated and fed into one sheet hits the registration roller 2, and the registration roller 2 moves in time with the original table 6 which is folded back from the position of the original table 6 ″ in the right direction in the drawing. The image of the original is copied on the recording paper 8 by the well-known electrophotographic process, and is rotated and conveyed.

The positional relationship between the document table and the paper feed tray will be described with reference to FIGS.

First, (a) is the home position. In this state, the copy process is started by operating a copy start key (not shown).

(B): The document table 6 "moves backward toward the reading start position (moves to the left in the figure). At the same time, the intermediate plate 5 rotates clockwise in the figure to feed the stack of recording sheets 8 stacked. The paper feed roller 3 is pressed against the paper roller 3. The paper feed roller 3 rotates clockwise in the figure.
The separation pad 4 feeds paper by friction (pressure contact) separation method, and the uppermost paper of the stacked recording papers 8 is fed toward the registration roller 2.

(C): The document table 6 ″ retracted to the reading start position starts moving forward (moves to the right side in the figure) in synchronism with the registration roller 2 which is waiting with the leading edge of the recording paper 8 aligned. The plate 5 finishes the pressure contact with the sheet feeding roller 3, and the driving of the sheet feeding roller 3 is also released.
And the recording sheet 8 conveyed by the other drive rollers downstream thereof.

(D): When the document table 6'passes the home position and reaches the area intersecting with the paper feed tray 7, the paper feed tray 7 has a second angle 7'with the rotary hinge 7a as the center.
Turn toward.

(E): When the document table 6'has moved forward to the reading end position, it moves backward toward the home position or the reading start position for the next copy operation. When the document table 6 leaves the intersecting area, the paper feed tray 7 faces the first angle,
Prepare for the next paper feed.

As described above, even in the small copy machine of the original table moving type, regardless of the distance between the original table 6 and the paper feed tray 7,
Since the paper feed tray 7 can secure the first angle suitable for the separation / feeding, reliable separation / feeding can be performed even by an inexpensive friction separation / feeding unit.

FIG. 3 shows a small copying machine as an image recording apparatus according to the first embodiment of the present invention. The same components as those of the basic configuration described above are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 3A shows the paper feed tray 7 at the first angle, and FIG. 3B shows the paper feed tray 7'at the second angle.

In the figure, 1 is a photosensitive drum, 2 is a registration roller, 3 is a paper feed roller, 4 is a separation pad, 5 is an intermediate plate, 6 is a document stand, 7 is a paper feed tray, 8 is recording paper, and 9 is A slide member on the side of the paper feed tray, 10 is a slide member on the side of the document table 6, 11 is a buffer member, 12 is a torsion coil spring, and 13 is a protrusion (first angle positioning portion).

The paper feed tray 7 is attached to the main body of the copying machine along the intermediate plate 5, and is swingably provided via a rotary hinge 7a with a variable tilt angle. The rotary hinge portion 7b of the paper feed tray 7 has a substantially circular shape, and has a protruding portion 7c that abuts a protrusion 13 provided on the copying machine main body at a predetermined circumferential position on the outer peripheral portion thereof.

Further, in FIG. 3A in which the torsion coil spring 12 is attached to the rotary hinge 7a and the paper feed tray 7 is at the first angle, the paper feed tray 7 is moved by the reaction force of the torsion coil spring 12. The rotary hinge 7a is biased counterclockwise in the figure, and the protrusion 7c of the rotary hinge portion 7b of the paper feed tray 7 is positioned where it abuts the protrusion 13.

Thus, the torsion coil spring 12 is always
Since the paper feed tray 7 can be secured at the first angle suitable for separating and feeding by the urging force of, the double feed can be eliminated even with the inexpensive friction separating and feeding means, and the weight of the stacked recording sheets 8 can be reduced. Since the front end of the paper is always set near the paper feed roller 3 of the separating / feeding means, a sufficient pressure contact force can be secured and reliable separation and feeding can be performed without leaving the last paper.

A sliding member 10 such as polyacetal resin having a high self-lubricating property is provided at the foremost portion in the moving direction of the document table 6 including the document retainer, and the stacking surface of the recording sheet 8 of the sheet feeding tray 7 is provided. A similar sliding member 9 is also provided in a rib shape on the uppermost portion of the side wall 7d at the highest position.

Therefore, when the document table 6 advances and tries to intersect the paper feed tray 7, the document table 6 continues to advance while the sliding members 9 and 10 rub against each other, and the paper feed tray 7 is moved.
Is rotated about the rotary hinge 7a, and the protrusion 7c of the rotary hinge portion 7b is rotated away from the protrusion 13 in the clockwise direction in the drawing to be retracted.

FIG. 3B shows the state in which the document table 6'has advanced to the document reading end position.

As described above, according to the movement of the document table 6, the document table side sliding member 10 and the tray side sliding member 9 slide to swing the paper feed tray 7 to the second angle. Therefore, it is possible to reduce the impact when the paper feed tray 7 swings. Therefore, the positional deviation of the recording paper 8 can be reduced.

When the document table 6'begins to move backward, the sliding members 9 and 10 do not rub against each other according to the position of the document table 6 ', so that the sheet feeding tray 7'at the second angle has a torsion coil spring 12. Got up due to the reaction force of
Return to the state of (a).

The cushioning member 11 provided between the end of the original table 6 and the sliding member 10 has a function to prevent the original table 6 from vibrating even when vibration such as stick slip occurs when the sliding members 9 and 10 slide.
It is made of a material such as rubber or sponge to absorb vibration so that it is transmitted to the main body of the copying machine and does not cause image blurring.

(Second Embodiment) FIG. 4 shows the first embodiment.
FIG. 9 is a perspective view of a small copying machine as an image recording apparatus according to the second embodiment with a slight modification.

Reference numeral 17 denotes a width regulating plate, and 18 denotes a stacked sheet curl prevention section (sheet curl prevention section).

This drawing is a view of the paper feed tray 7 on which recording paper is not stacked, as seen from the front and diagonally above the main body of the copying machine. Usually, a recording sheet (not shown) is set in the sheet feeding tray 7 by being sandwiched by a width regulating plate 17 provided to prevent a certain skew.

In this embodiment, a tray side sliding member 9 is provided on the ridge which is the uppermost portion of the width regulating plate 17, and the width of the recording paper 8 is regulated by the paper-sheet turning-up preventing portion 18 so as to enclose the recording paper 8. As a result, the disturbance of the stacked recording sheets 8 due to the swing of the sheet feeding tray 7 is prevented.

Similarly, an openable / closable dust cover may be provided on the paper feed tray 7, and a tray side sliding member 9 may be provided in a rib shape on the uppermost portion of the dust cover.

Since the other structures and operations are the same as those of the first embodiment, the same components are designated by the same reference numerals and the description thereof will be omitted.

(Third Embodiment) FIG. 5 shows a small copying machine as an image recording apparatus according to the third embodiment.

Reference numeral 7a is a rotary hinge which is the rotary shaft of the paper feed tray 7, 14 is a rotary arm provided at a predetermined position in the circumferential direction on the outer peripheral portion of the rotary hinge portion 7b, 15 is a link, 16 is a solenoid, and 19 is a compression spring. , 20 represents the plunger of the solenoid 16.

From these, driving means for tilting the paper feed tray 7 from the first angle to the second angle is formed.

The paper feed tray 7 shown by the solid line in the figure shows that it is at the first angle, and the paper feed tray 7'shown by the two-dot chain line.
Is at the second angle.

The plunger 20 is provided so as to be reciprocally movable. The tip end of the plunger 20 and the rotating arm 14 are provided.
And are connected by a link 15. A compression spring 19 is provided on the outer peripheral portion of the plunger 20.

A compression spring 19 provided coaxially with the plunger 20 of the solenoid 16 urges the rotary arm 14 of the rotary hinge portion 7b of the paper feed tray 7 counterclockwise via a link 15 to supply The paper feed tray 7 is held at the first angle when the protruding portion 7c of the rotary hinge portion 7b of the paper tray 7 abuts the protrusion 13.

When the document reading is started, if the control means (not shown) judges that the paper feed tray 7 and the document table 6 intersect based on a signal from the document table position detecting means (not shown), the solenoid 16 is operated, By pulling the plunger 20, the rotating arm 14 is rotated clockwise in the drawing to provide the paper feed tray at the second angle 7 '. When the document table 6 finishes the reading operation and moves to a region that does not intersect the paper feed tray 7 at the first angle, the control means (not shown) causes the solenoid 1 to move.
6 is released, and the reaction force of the compression spring 19 causes the paper feed tray 7 to return to the first angle again.

As described above, based on the information of the position detecting means of the document table 6, the control means rotates the sheet feeding tray 7 to the second angle by driving the solenoid 16 so as not to intersect with the document table 6. As a result, it is possible to ensure that they do not intersect.

The rest of the structure and operation are the same as the basic structure described above, and therefore their explanations are omitted.

(Embodiment 4) In Embodiments 1, 2, and 3, the paper feed tray 7 is always at the first angle and is retracted only when it intersects with the document table 6.

Then, when the paper feed tray 7 rotates from the first angle to the second angle, the original is being read,
There is a possibility that the image being copied is disturbed by the vibration caused by the movement or drive of the paper feed tray 7. Therefore, in the third embodiment, the paper feed tray 7 is configured to have the first angle only during the paper feeding, and to have the second angle otherwise.

FIG. 6 shows a small copying machine as an image recording apparatus according to the third embodiment.

In order to make the rotation mechanism of the paper feed tray 7 easy to understand, the above-mentioned paper feed mechanism such as the intermediate plate 5 is omitted.

Reference numeral 21 is a cam, 22 is an intermittent gear, 23 is a drive gear, 24 is a boss, 25 is a trigger link, 26 is a cam follower arm, 27 is a sheet feeding solenoid, 28 is a trigger link rotating shaft, and 29 is a spring hooking portion. Represents

The cam follower arm 26 extends toward the paper feed roller 3 from a predetermined position on the outer peripheral portion of the rotary hinge portion 7b.

The sheet feeding solenoid 27 is a driving means for rotating the sheet feeding roller 3 and turns on a sheet feeding clutch (not shown) for transmitting power from a main motor (not shown) to the sheet feeding roller 3. It is conventionally provided to turn on / off.

The drive gear 23 is provided to branch from a gear train (not shown) connected to the paper feed roller 3 and to transmit power to the intermittent gear 22.

A cam 21 and a boss 24 are fixed to the intermittent gear 22.

The trigger link 25, which is rotatable about the trigger link rotating shaft 28, has a feed solenoid 27 at one end.
Is connected to the tip of a reciprocating plunger 27a and the other end is abutted against the boss 24 to stop the rotation of the intermittent gear 22.

The intermittent gear 22 is normally stopped with the cutout portion 22a facing the drive gear 23, and when the sheet feeding solenoid 27 is operated to rotate the sheet feeding roller 3 for the separation sheet feeding operation, the trigger link 25 is passed. As a result, the stopper of the boss 24 is released, and the boss 24 is rotated once through the drive gear 23 in the clockwise direction in the figure. At the same time, the cam 21 also makes one revolution, and when the cam follower arm 26 is rotated about 25 ° for the first time, the paper feed tray 7 is tilted to the first angle, and that angle is held for a while during the separation / feed operation, and then slowly. Returning to the second angle shown in FIG.

That is, the trigger link 25 and the boss 24, which are rotatable about the trigger link rotating shaft 28, are driven by the drive gear 23 and the intermittent gear 2 when the paper feed roller 3 starts rotating.
2, the feeding roller 7 via the cam 21 constitutes a transmission means for transmitting the power of one cycle during the separated feeding.

A spring hook 29 is provided at the tip of the cam follower arm 26, and the cam follower arm 26 is always moved along the contour of the cam 21 by a tension spring (not shown).

As described above, the existing sheet feeding solenoid 27 is used as a trigger, and the power is also received from the main motor through the gear train that moves the sheet feeding roller 3, thereby simplifying the configuration and setting the sheet feeding tray 7 to the first tray only during the separation sheet feeding. By tilting to one angle, a reliable separation / feed operation without vibration problem can be obtained.

The other structure and operation are the same as those of the basic structure described above, and the description thereof will be omitted.

[0093]

As described above, according to the present invention,
Since the sheet stacking table can be swung at the second angle at which the moving area of the document table and the sheet stacking table do not intersect with each other, the sheets can be separated and fed by the friction separating and feeding means regardless of the downsizing of the apparatus body. You can

Further, by setting the first angle to the inclination angle of the sheet stacking table when the sheets stacked on the sheet stacking table are frictionally separated and fed to the image forming section, a small image recording of the original table moving type is performed. In the apparatus as well, the sheet stacking table can be secured at the first angle suitable for separation and feeding regardless of the distance between the document table and the sheet stacking table, so that the inexpensive friction separating and feeding means can surely separate and feed the sheet. Can be sent.

Further, since the sheet stacking base can always be secured at the first angle suitable for separation and feeding by the urging force of the urging means, double feeding can be eliminated even with inexpensive friction separation and feeding means, and Since the leading edge of the sheet is always positioned with respect to the separating / feeding means by the weight of the stacked sheets, the separating / feeding can be surely performed without causing the feeding failure.

Then, according to the information of the position detecting means of the document table, the control means drives the sheet stacking table by the driving means so as not to intersect with the document table and swings to the second angle. Make sure you don't cross.

Further, since the sliding member on the platen side slides with the sliding member on the sheet stacking table in accordance with the movement of the document table to swing the sheet stacking table at the second angle, The impact when the sheet stacking table is swung can be reduced. Therefore, it is possible to reduce the positional deviation of the sheet.

Further, by providing a cushioning member between the end of the platen and the slide member on the platen side, when the slide member on the platen side and the slide member on the sheet stacking side slide, the stick Even if a vibration such as a slip occurs, the vibration can be absorbed, so that the vibration is not transmitted to the document table or the apparatus main body. As a result, image blurring does not occur and good image formation can be obtained.

Further, a sheet turning-over preventing portion is provided on the sheet stacking table, and a sliding member which makes sliding contact with the sliding member of the original table is provided in the turning-up preventing section, so that the stacked sheets are swung by the sheet loading table. Disturbance can be prevented.

Then, at the start of rotation of the rotary friction member of the friction separating / feeding means, the power transmitting member is separated and fed by the rotating friction member by the transmitting means for transmitting power to the power transmitting member to the sheet stacking table. Transmit 1 cycle of power,
By reciprocally rotating the sheet stacking base between the second angle and the first angle, the sheet stacking base can be tilted to the first angle only during the separation feeding, so there is no problem of vibration. It is possible to obtain a separate feeding operation and a good image formation.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a basic configuration of a small copying machine as an image recording apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a positional relationship between a document table and a paper feed tray in FIG.

FIG. 3 is a configuration diagram of a main part of a small copying machine as an image recording apparatus according to the first embodiment of the present invention.

FIG. 4 is a perspective view of a main part of a small copying machine as an image recording apparatus according to a second embodiment of the present invention.

FIG. 5 is a configuration diagram of essential parts of a small copying machine as an image recording apparatus according to a third embodiment of the present invention.

FIG. 6 is a main part configuration diagram of a small-sized copying machine as an image recording apparatus according to a fourth embodiment of the present invention.

FIG. 7 is a schematic configuration diagram of a compact copying machine as a conventional image recording apparatus.

[Explanation of symbols]

 1 Photosensitive Drum 2 Registration Roller 3 Paper Feed Roller (Friction Separation Feeding Means; Rotation Friction Member) 4 Separation Pad (Friction Separation Feeding Means; Separation Friction Member) 5 Middle Plate (Friction Separation Feeding Means) 6 Original Plate 7 Paper feed tray (sheet stacking table) 8 Recording paper (sheets) 9 Tray side sliding member 10 Original table side sliding member 11 Cushioning member 12 Torsional coil spring (biasing means) 13 First angle positioning section 14 Rotating arm 15 Link 16 Solenoid (driving means) 17 Width regulation plate 18 Stacked paper curl prevention part (sheet curl prevention part) 19 Compression spring 20 Plunger 21 Cam (power transmission member) 22 Intermittent gear (power transmission member) 23 Drive gear (power transmission) Member) 24 Boss (Transmission Means) 25 Trigger Link (Transmission Means) 26 Cam Follower Arm (Power Transmission Member) 27 Paper Feed Solenoid (Driving means) 28 Trigger link rotation axles (transmitting means) 29 spring hook portion

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kanji Yano 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Kazuaki Aoki 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Within the corporation

Claims (8)

[Claims] 1. An image recording apparatus for reading a document image by moving a document table on which a document is placed, and recording the document image on a sheet in an image forming unit, in which sheets for recording the document image are stacked. And a friction separating / feeding means for feeding sheets one by one to the image forming unit, the inclination angle of the sheet stacking table is variable, and the moving area of the document table is the sheet stacking section. A first angle on the sheet stacking table that intersects the table and a second angle on the sheet stacking table where the moving area of the document table and the sheet stacking table do not intersect, and at least stepwise or the first angle and the second angle. An image recording apparatus characterized in that it can be continuously swung between the angles. 2. The first angle is an inclination angle of the sheet stacking table when the sheets stacked on the sheet stacking table are frictionally separated and fed to the image forming unit, and the second angle is The image recording apparatus according to claim 1, wherein the inclination angle of the sheet stacking table does not intersect with the sheet stacking table even when the document table moves. 3. The sheet stacking table, which is always biased to the first angle by a biasing means, and the document table is positioned at the first angle by a document reading operation. The image recording apparatus according to claim 1 or 2, wherein the sheet stacking base is tilted to the second angle when the sheet stacking base is moved to the intersecting area. 4. A position detecting means for the document table, a driving means for inclining the sheet stacking table to the second angle, and information whether the document table intersects the sheet stacking table based on information from the position detecting means. 4. A control means for operating the drive means when intersecting is provided.
The image recording device described in 1. 5. A slide member is provided on each of the sheet stacking table side end of the document table and the sheet stacking table, and the slide member of the document table moves with the movement of the document table. The image recording apparatus according to claim 3, wherein the sheet stacking base is tilted to the second angle by advancing while slidingly contacting the sliding member. 6. The cushioning member according to claim 5, wherein a cushioning member is provided between the sheet stacking table side end of the document table and the sliding member on the sheet stacking table side end. Image recording device. 7. The sheet turning-over preventing portion is provided on the sheet stacking table, and the turning-up preventing portion is provided with a sliding member which is in sliding contact with a sliding member of the document table. Image recording device. 8. The friction separating / feeding means has a rotary friction member, and driving means for rotationally driving the rotary friction member and driving force of the rotary friction member are intermittently transmitted to the sheet stacking table. A power transmission member and a transmission unit for transmitting power to the power transmission member when the rotation of the rotary friction member is started, and the power transmission member is separately fed by the rotation friction member by the transmission unit. The image recording apparatus according to claim 1 or 2, wherein the sheet stacking base is reciprocally rotated to the second angle and the first angle by transmitting power for one cycle.