JPH06191650A - Automatic paper feeding device and recording device - Google Patents

Abstract

PURPOSE:To prevent each sheet from being obliquely fed by surely controlling the width direction of each sheet to be fed. CONSTITUTION:When paper sheets P piled up over a pressure plate 21 are fed by a feeding roller 5, small projections 19a are provided for side guides 19 restricting the right and left end sections of the width direction of each sheet P. The provision of the aforesaid projections 19a enables the right and left and sections of each sheet P to be restricted, so that each sheet P is prevented from being obliquely fed even if each sheet is subjected to any force promoting oblique feeding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic sheet feeder for automatically feeding sheet materials one by one and a recording apparatus using the same.

[0002]

2. Description of the Related Art Conventionally, a recording apparatus provided with an automatic paper feeding device such as a printer, a copying machine, a fax machine, etc., drives a recording head based on image information, thereby forming dots on a sheet material such as paper or a plastic thin plate. Is configured to form an image consisting of Inkjet type, wire dot type, thermal type, electrophotographic type and the like are known for the recording apparatus depending on the recording method.

As a method of feeding the sheet material used in the recording apparatus, the sheet material is manually fed one by one, or
Alternatively, a method of automatically and continuously feeding paper by an automatic paper feeder is known.

When the automatic sheet feeder automatically and continuously feeds the sheet materials one by one, as a separating method, a claw separating method or a sheet using a separating claw for pressing the tip corner portion of the sheet material is used. A friction separation method in which a material and a loading means are separated by a frictional force is widely used.

Further, in order to reduce the skew of the sheet material at the time of separation and feeding, side sheets are provided at both ends of the sheet material for regulation when the sheet material is stacked. In order to further improve the regulation of the side guides, a high-friction member such as rubber or sponge or an urging member is attached to the contact surface of the side guides with the sheet material, or the side guide is attached to the upper side of the stacked sheet material. Put the eaves above the guide from the guide. There are some such measures taken.

[0006]

However, the above-mentioned conventional example has the following drawbacks.

(1) In the case where the high friction member or the biasing member is attached to the side guide, the sliding resistance with respect to the side guide when the sheet material is fed and conveyed becomes large, and the image shrinks or skews. Etc. may occur.

(2) In the case where a U-shaped eave is provided from the side guide, pressure is applied to the sheet material from the eaves when a sheet material or the like which is warped in a U shape is loaded.
The sliding resistance between the eaves and the sheet material or between the sheet materials and the sheet materials is increased, and the image may be contracted or skewed as described above.

(3) When the last sheet of the sheet material is back-fed at the front end portion of the side guide in the sheet material feeding direction, the rear end may collide with the front end of the side guide and the rear end may be broken.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a side guide capable of reliably controlling the width direction of a sheet material at the time of feeding the sheet material. .

[0011]

According to the present invention, means for stacking sheet materials, means for separating and feeding sheet materials stacked on the stacking means one by one, and for separating and feeding An automatic feeding device having a side guide portion that regulates at least one left and right end portion of a sheet material is characterized in that a single or a plurality of convex portions are provided on a surface of the side guide that regulates the sheet material.

[0012] It is preferable that the cross-sectional shape of the convex portion perpendicular to the sheet material feeding direction is substantially the same triangle that is narrowed from the root toward the tip.

The length of the convex portion parallel to the sheet material feeding direction may be longer than the root length in the cross-sectional shape of the convex portion perpendicular to the sheet material feeding direction.

In the cross-sectional shape of the convex portion perpendicular to the sheet material feeding direction, the angle formed by the surface of the convex portion on the sheet material stacking surface side and the sheet material regulating surface of the side guide may be substantially right angle or obtuse angle. .

It is preferable that the front end and the rear end of the convex portion with respect to the direction parallel to the sheet material feeding direction are shaped to converge on the sheet material regulating surface of the side guide portion.

Further, the present invention is characterized in that the recording apparatus is equipped with the above-mentioned automatic paper feeding apparatus and records on the sheet material fed by the automatic paper feeding apparatus.

Further, it is characterized in that a taper is provided on the back side of the stacking surface at the front end of the side guide portion in the sheet material feeding direction, and a gap is provided between the side guide part and the stacking means.

[0018]

According to the present invention, by the above-mentioned means, it is possible to improve the regulation effect of the side guide which reduces the skew and the like without providing the sliding of the sheet material at the time of separating the sheet material and feeding the sheet material. it can. Therefore, it is possible to provide a good image with less skew and less image shrinkage.

Further, even if the last paper is back-fed at the tip of the side guide, it does not enter into the gap between the side guide and the sheet material stacking surface, and the rear end is not bent.

[0020]

1 to 9 show a first embodiment of the present invention. The present embodiment is a recording device integrated with an automatic paper feeding device, and comprises a paper feeding portion, a paper feeding portion, a paper discharging portion, a carriage portion, and a cleaning portion. First, the general configuration and operation of these will be described.

FIG. 1 is a perspective view of the whole structure, FIG. 2 is a sectional view of the whole structure, FIG. 3 is a front view of the paper feeding unit, and FIG. 4 is a side view of the paper feeding unit.

The paper feed section 11 is attached to the main body side at an angle of 30 ° to 60 °, and the set recording sheet (sheet material) P is discharged horizontally after printing. The sheet feeding unit 11 includes a sheet feeding roller 5, a separating claw 17,
The movable side guide 19, the base 20, the pressure plate 21, the pressure plate spring 22, the drive gears 25 to 30, the release cam 31, the claw spring 32, the operation lever 33, the release cam 35, and the like. Since the release cam 31 normally pushes down the pressure plate 21 to the position shown in FIG. 2, the recording sheet P is separated from the paper feed roller 5.

With the recording sheet P set, the drive of the conveying roller 36 is transmitted to the paper feeding roller 5 and the release cam 31 by the gears 25 to 30. Release cam 31
When is separated from the pressure plate 21, the pressure plate 21 rises to the position shown in FIG. 6, the sheet feeding roller 5 and the recording sheet P contact each other, are picked up as the sheet feeding roller 5 rotates, and are separated one by one by the separation claw 17. . The separated recording sheet P is sent to the paper feeding unit. The paper feed roller 5 and the release cam 31 rotate once until the recording sheet P is fed to the paper feed unit 11, and the drive from the paper feed roller 5 is cut off with the pressure plate 21 released to the paper feed roller 5 again. This initial state is retained.

The paper feeding section 12 comprises a conveying roller 36, a pinch roller 37, a pinch roller guide 39, a pinch roller spring 40, a PE sensor lever 41, a PE sensor 42, a PE sensor spring 43, an upper guide 45, a platen 46 and the like.

The recording sheet P sent to the paper feeding unit 12 is sent to a roller pair of a conveying roller 36 and a pinch roller 37 with the platen 46, the pinch roller guide 39 and the upper guide 45 as guides. A PE sensor lever 41 is provided in front of this roller pair, detects the leading edge of the recording sheet P, and obtains the print position on the recording sheet P. The pinch roller 37 is pressed against the conveying roller 36 by urging the pinch color guide 39 by the pinch roller spring 40, and generates the conveying force of the recording sheet P.

The recording sheet P sent by the roller pair 36, 37 is driven by an LF motor 47.
When the recording head 49 rotates, it advances along the platen 46, and the recording head 49 can perform recording based on predetermined image information. The recording head 49 is an ink jet recording head that is configured integrally with the ink tank and is easily replaceable. The recording head 49 is provided with an electric exchanger, and recording is performed by ejecting ink from the ejection port by utilizing pressure change caused by growth and contraction of bubbles due to film boiling caused by applied thermal energy.

The carriage unit 15 includes a carriage 50 to which the recording head 49 is attached, a carriage 50, and a recording sheet P.
A guide shaft 51 for reciprocating scanning in a direction perpendicular to the conveyance direction of the carriage and a guide 52 for holding the rear end of the carriage 50 and maintaining the space between the head and the paper, and a timing belt 55 for transmitting the drive of the carriage motor 53 to the carriage 50. The timing belt 55 is provided with an idle pulley 56, a flexible substrate 57 for transmitting a head drive signal from the electric substrate to the recording head 49, and the like. An image is formed on the recording sheet P conveyed on the platen 46 by scanning integrally with the recording head 49 and the carriage 50.

The paper discharge section includes a paper discharge roller 59 and a paper discharge roller 5.
9 is provided with a transmission roller 60 for transmitting the drive of the conveying roller 36, a spur 61 for assisting the discharge, and a paper discharge tray 62. The image on the recording sheet P is discharged onto the discharge tray 62 without being stained by the discharge rollers 59 and the spurs 61.

The cleaning unit 16 includes a pump 63 for cleaning the recording head 49, a cap 65 for suppressing the drying of the recording head 49, and a drive switching arm 66 for switching the drive from the conveying roller 36 to the paper feeding unit 11 and the pump 63. It consists of

The drive switching arm 66 is at the position shown in FIG.
Since the planetary gear (not shown) that rotates around the shaft center of 6 is fixed at a predetermined position, the drive of the conveying roller 36 is not transmitted to the pump 63 and the sheet feeding unit 11. When the drive switching arm 66 is moved in the direction of arrow A by moving the carriage 50, the planetary gears move in accordance with the forward and reverse rotations of the transport roller 36, and the paper feed unit is driven when the transport roller 36 rotates normally. The driving force is transmitted to the pump 63 during reverse rotation.

The LF motor 47 for driving the conveying rollers 36 and the carriage motor 53 for driving the carriage 50 are stepping motors which rotate by a predetermined angle in response to a signal sent from a driver (not shown). .

The paper feed roller 5 is provided with a sensor plate 69 having a radius smaller than the diameter of the paper feed roller rubber 67 attached to the paper feed roller 5. The sensor plate 69 is partially cut away, and the paper feed roller 5 and the release cam 3 are
Only when 1 is at the initial position for releasing the pressure plate 21 shown in FIG. 2, the roller sensor 72 formed of a photo interrupter or the like directly provided on the electric substrate 70 is configured to be in a light transmitting state without being shielded. . By detecting the state of the sensor plate 69, the angular position of the paper feed roller 5 and the release cam 3 that is interlocked with the paper feed roller 5 in phase
The angular position of 1 can be detected, and the control timing in the paper feeding sequence of the recording sheet P can be achieved.

Next, the paper feeding unit according to the present invention will be described in detail. The sheet feeding unit 11 is a unit in which each component of the sheet feeding unit is attached to the base 20. Paper feed unit 1 of this embodiment
1 is based on one side of the recording sheet P, and the inside of the right side plate of the base 20 is the paper reference. Base 2
In No. 0, the pressure plate 21 can be retracted as shown in FIG. 5, and the pressure plate spring 72 is located at a position substantially facing the roller portion 5c of the sheet feeding roller 5.
A concave portion for forming the is formed.

The pressure plate 21 is connected to the base 20 by pressure plate shafts 21b at the upper ends of both ends and is rotatable about the pressure plate shaft 21b. A separating pad 73 made of a material having a relatively large friction coefficient such as artificial leather is provided at the position of the sheet feeding roller of the pressure plate 21 to prevent double feeding when the number of sheets becomes small. Further, a movable side guide 19 that can slide left and right on the pressure plate 21 is attached,
Recording sheets P of different sizes can be set on the paper reference surface.

FIG. 7 shows a sectional view of the side guide 19 mounted on the pressure plate 21, FIG. 8 shows a front view of the side guide 19, and FIG. 9 shows a detailed sectional view of the convex portion 19a provided on the side guide 19.

As shown in FIG. 7, the side guide 19 is attached so that the clip 19c of the side guide 19 is pressed against the holder 21c of the pressure plate 21 by its spring property so as to sandwich it. The side guide 19 is provided with a knob 19b for the user to operate, and the sliding force for moving the pressure plate 21 left and right is set to about 250 to 1000 g.

The convex portion 19a is provided substantially parallel to the recording sheet P stacking surface 19g on the recording sheet P regulating surface 19h, for example, four convex portions 19a having the same shape in this embodiment. Convex part 1
9a has a substantially triangular shape as shown in FIG. 9, and the height 19j from the regulation surface 19h is about 0.2 to 1 mm.
The height 19f of the root is about 0.2 to 1 mm, and the angle 19 formed by the plane parallel to the loading surface 19g of the convex portion 19a and the regulation surface 19h.
f is constructed at a substantially right angle.

Even if the side guides 19 are pressed against the loaded recording sheets by the above-described shape and size, as shown in FIG. The clearance between the end portion of P and the regulation surface 19h can be small. Further, since the angle 19f is set to a right angle, even when the recording sheet P is skewed in the D direction shown in FIG. 8, the end portion can be reliably caught as shown in FIG. Can be improved.

Further, the end portion 19d of the stacking surface 19g of the recording sheets P has an oblique taper shape toward the end portion as shown in the CC sectional view in FIG. As a result, even if the side guide 19 is moved to the side where the recording sheets P are stacked, the end portions of the recording sheets P easily enter under the stacked recording sheets P, and the recording sheets P are easily stacked.

Further, the lower end portion of the restriction surface 19h has a shape in which a taper 19k which is open to the outside is provided. Even when the trailing edge of the recording sheet P is just at the end of the regulation surface 19h of the side guide 19 when the recording sheet P is back-fed during recording, the trailing edge of the recording sheet P is escaped by the taper 19k. Does not hit the side guide 19 and is not broken.

Further, as shown in FIG. 7, the leading end of the stacking surface 19g of the recording sheets P has a shape provided with a taper 19e. Even when the trailing edge of the recording sheet P is just at the end of the stacking surface 19g of the side guide 19 when the last stacked recording sheet P is fed back during recording, the taper 19e is formed.
Since the trailing edge of the recording sheet P hits the side guide 19 and is not folded because it slips into the inside.

Both ends of the paper feed roller 5 are held by the base 20 and are rotatable. The paper feed roller 5 has a shaft portion 5b.
The roller 5c is an integrally molded product made of plastic and the like, and a paper feed roller rubber 67 for carrying the recording sheet P is provided around the roller 5c.

The roller portion 5c is formed in a D shape (or a half-moon portion), and the radius of the paper feeding roller rubber 67 attached to the paper feeding roller 5 on each outside of the roller portion 5c is 0.
A roller roller 75 having a smaller radius of 5 to 3 mm is provided, and the recording sheet P contacts the roller rubber 67 of the paper feeding roller 5 when the paper is not being fed, thereby preventing the image from becoming dirty or the paper feeding roller 5 from being displaced. .

Further, two roller portions 5c are provided and fixed at positions of about 40 mm and about 170 mm, respectively, based on the paper standard. Therefore, the A4 size or the like is conveyed by the two roller portions 1c, and the postcard or the like is conveyed by the one roller on the paper reference side.

The drive switching arm 66 of the cleaning section 16 is moved by the carriage 50 in the direction of arrow A,
When the transport roller 36 is rotated in the normal direction, a planet gear (not shown) moves and meshes with the input gear 25, whereby the drive is transmitted to the paper feeding unit. The input gear 25 transmits drive to a paper feed roller gear 28 connected to the paper feed roller 5 via idler gears 26 and 27, and the recording sheet P can be conveyed by rotating the paper feed roller 5.

Further, the drive of the paper feed roller gear 28 is transmitted to the release cam 31 via the clutch gear 29 and the idler gear 30. At this time, the paper feed roller 5 and the release cam 31 are configured to be in phase for each rotation,
When the pressure plate 21 shown in FIG. 2 is released,
As shown in FIG. 2, the sheet feeding roller 5 is arranged so that the half-moon portion thereof faces the pressure plate 21.

The release cam 31 is shaped so as to release the pressure plate 21 only during the half-moon angle of the paper feed roller 5 of about 120 °, and the pressure plate 2 is provided except the half-moon part of the paper feed roller 5.
1 is always contacted with the recording sheet P or the pressure plate 21 at a pressure of 200 g to 500 g. Further, the release cam 31 releases the pressure plate 21 by pushing down the push-down portion 21c of the pressure plate 21 protruding from the hole opened in the right side plate of the base 20. At this time, the pressure plate cam 76 attached to the base 20 is pushed down by the cam 21d on the side closer to the push-down portion 21c of the pressure plate 21, and the pressure plate cam 76 rotates about the center 76b. Then, the pressure plate cam 76 pulls down the cam 5f on the outside of the left paper feed roller portion 5c. As described above, the push-down portion 2 at the end of the pressure plate 21
Even if 1c is lowered, the pressure plate 21 does not tilt with respect to the base 20 and is released substantially in parallel. A clutch spring 77 is provided in the middle of the clutch gear 29, and is indicated by an arrow B in FIG.
The direction is such that the spring is tightened so that it does not reverse. As a result, the paper feed roller 5 does not rotate due to the elasticity of the recording sheet P when performing registration or the like, so that good registration can be performed.

The separating claw 17 is rotatable about a center 17b, and is basically urged by the claw spring 32 against the recording sheet P or the pressure plate 21 at 20 g to 100 g. The separation claw 17 is for separating the so-called plain paper recording sheet P when it is fed, and is provided only on the paper reference side as shown in FIG. 3, and the corners of the recording sheet P are covered with a triangle. It has a unique shape.

The recording sheets P can be separated one by one by receiving resistance at the triangular portion. The operation lever 33 has two positions of a plain paper feed position and a thick paper feed position, and each position is provided at an angular position interval of about 20 ° to 50 °.

At the plain paper feed position, the release cam 31 is set to a position where it acts on the separation claw 17 by the cam 33b of the operation lever 33. Therefore, when the pressure plate 21 is released, the separation claw 17 can rotate upward as shown in FIG. 5 to set the recording sheet P, and when separating at the time of sheet feeding, it acts on the corner of the recording sheet P to perform separation. .

In the thick paper feed position, the separating claw 1
Since the release cam 31 does not work on 7,
The separation claw 17 urges the pressure plate 21 and does not act during separation.

The gear group (excluding the paper feed roller shaft 79), the separating claw 17, the operation lever 31 and the like are provided on a shaft installed on the right side plate of the base 20 and are rotatable about the shaft. Has been done. The feeding unit 12 includes the transport roller 3
6, pinch roller 37, pinch roller guide 39, pinch roller spring 40, PE sensor lever 41, PE sensor 42, PE sensor spring 43, upper guide 45, platen 4
It consists of 6 mag. Then, each unit or unit is attached to the chassis 3.

The recording sheet P fed from the sheet feeding portion 11 is a platen 46, a pinch roller guide 39, and an upper guide 45.
Is used as a guide to be sent to a roller pair of a conveyance roller 36 and a pinch roller 37. The PE sensor lever 41 is provided on the upper guide 45 in front of the roller pair.

The PE sensor lever 41 is rotatable about an axis attached to the upper guide 45, and when the recording sheet P is not present, it is biased by the PE sensor spring 43 to a position where the PE sensor 42 is shielded from light. The PE sensor 42 is an optical sensor such as a photo interrupter and is directly attached to the electric substrate 70. When the recording sheet P is fed, it comes into contact with the PE sensor lever 41 and rotates it, so that the PE sensor 42 changes from the light-shielded state to the light-transmitting state. By this operation, the leading edge of the recording sheet P can be detected.

The transport roller 36 positions the platen 46 and is attached to the chassis. A pinch roller 37 is rotatably attached to the pinch roller guide 39, and a rotary shaft 39b is rotatable about a bearing 45b of the upper guide 45. Then, the pinch roller spring 43 provided on the upper guide 45 presses the conveyance roller 36 to generate a conveyance force for the recording sheet P.
As shown in FIG. 11, the pinch roller 37 has a length of 30 to 50 m.
m, the diameter is φ2 to 5 mm, and a plurality of both ends are held by the pinch roller guide 39 and pressed.

By using the pinch roller 37 having a small diameter as described above, the recording sheet P is transferred to the roller pair 36, 37.
The printing position of the recording head 49 can be brought close to the position where the recording sheet P and the recording head 49 are pressed.
The gap can be made uniform and small, so that a good image can be obtained.

The recording sheet P sent by the roller pair 36, 37 is fed by the LF motor 47 to the roller pair 36, 37.
When the recording head 49 rotates, it advances along the platen 46, and the recording head 49 can perform recording based on predetermined image information.

[0058]

[Other Examples]

(Second Embodiment) In the above embodiment, the side guide 19
Although the front and rear ends of the convex portion 19a of the convex portion 19a with respect to the direction parallel to the feeding direction of the recording sheet P are perpendicular to the regulation surface of the side guide 19, as shown in FIGS. May be.

In this embodiment, the ridge line 1 at the tip of the convex portion 19a is used.
9l faces the regulating surface of the side guide 19 so as to draw an arc as shown in FIG. 12, and the convex portion 19a converges accordingly.

In this case, when the recording sheets P are stacked or when the recording sheets P are back-fed at the time of recording, the leading ends of the recording sheets P are not caught by the convex portions 19a, the possibility of corner bending is small, and the operation is possible. Sex is also improved.

The other structure is exactly the same as that of the above-mentioned embodiment.

(Third Embodiment) In the above embodiment, the angle 19f of the convex portion 19a is substantially right angle, but as shown in FIG. 13, the angle 19f 'may be further increased to make an obtuse angle.

In this case, since the recording sheet P is more reliably applied to the convex portion 19a, the regulation effect of the recording sheet P can be further improved.

The other structure is the same as that of the above embodiment.

(Fourth Embodiment) In the above embodiment, the convex portion 19a for improving the regulation effect of the recording sheet P is provided only on the side guide 19, but as shown in FIG. 14, it is symmetrical with the convex portion 19a. You may provide in the convex part 20c and base 20 of the same shape.

In this case, the same regulation can be performed regardless of whether the recording sheet P skews left or right.

The other structure is the same as that of the above embodiment.

[0068]

The present invention has the following effects.

1) It is possible to improve the regulation effect of the side guide without causing the sliding resistance of the sheet material at the time of separating the recording sheet and feeding the sheet. Therefore, it is possible to provide a good image with less skewing and image shrinkage.

2) Since the cross-sectional shape of the side guide convex portion perpendicular to the sheet material feeding direction is a thin triangle from the root to the tip, when the sheet material is loaded, the gap between the side guide regulating surface and the sheet material is reduced. The time is short, and the regulatory effect is not compromised.

3) Since the length of the convex portion parallel to the sheet material feeding direction is longer than the root length in the cross-sectional shape of the convex portion perpendicular to the sheet material feeding direction, the convex portion when the sheet material is skewed or the like is formed. The regulation effect of can be improved.

4) In the sectional shape of the convex portion perpendicular to the sheet material feeding direction, the angle formed by the surface of the convex portion on the sheet material stacking surface side and the regulating surface of the side guide is substantially the same right angle or obtuse angle, It is possible to improve the regulation effect at the convex portion when the sheet material is skewed.

5) The front end and the rear end of the convex portion with respect to the direction parallel to the sheet material feeding direction are converged on the regulation surface of the side guide, so that the sheet material can be stacked and back fed during recording. The possibility of breaking the corners of the sheet material is reduced.

6) By providing the taper on the back side of the leading end of the side guide sheet stacking surface in the sheet feeding direction, even if the last paper is just back-fed at the leading end of the side guide, it enters the tapered portion, so that the trailing end is It does not break.

[Brief description of drawings]

FIG. 1 is a perspective view of a recording device including a feeding device according to a first embodiment of the invention.

FIG. 2 is a side view of a recording apparatus including the feeding device according to the first embodiment of the present invention.

FIG. 3 is a front view of the feeding device according to the first embodiment of the present invention.

FIG. 4 is a side view of the feeding device according to the first embodiment of the present invention.

FIG. 5 is an explanatory side view of the feeding device according to the first embodiment of the present invention.

FIG. 6 is an explanatory side view of the feeding device according to the first embodiment of the present invention.

FIG. 7 is a side view of the side guide according to the first embodiment of the present invention.

FIG. 8 is a front view of a side guide according to the first embodiment of the present invention.

FIG. 9 is a detailed view of a side guide convex portion according to the first embodiment of the present invention.

FIG. 10 is a front view of a side guide according to a second embodiment of the present invention.

FIG. 11 is a side surface of a side guide according to the second embodiment of the present invention.

FIG. 12 is a detailed view of a side guide protrusion of the second embodiment of the present invention.

FIG. 13 is a detailed view of the side guide protrusion of the third embodiment of the present invention.

FIG. 14 is a side view of a base convex portion according to the fourth embodiment of the present invention.

[Explanation of symbols]

 5 Rotating Feeder 17 Separation Claw 19 Movable Side Guide 19a Side Guide Convex 19d Right End Tapered 19e Lower End Tapered 19f Convex Angle 19g Side Guide Recording Sheet Loading Surface 19h Side Guide Recording Sheet Restricting Surface 19i Convex Root Width 19j Convex Projection height 19k Control surface lower end taper portion 19l Convex ridge line 21 Pressure plate P Recording sheet (sheet material)

Front Page Continuation (72) Inventor Masahiro Yaniguro 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Takashi Nojima 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Hiroyuki Kinoshita 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Tetsuo Suzuki 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Satoshi Satagawa 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Hideaki Kawakami 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (9)

[Claims] 1. A means for stacking sheet materials, a means for separating and feeding the sheet materials stacked on the stacking means one by one, and at least one left and right end portion of the sheet materials at the time of separation and feeding. An automatic feeding device having a regulating side guide portion, wherein a single or a plurality of convex portions are provided on a surface of the side guide for regulating the sheet material. 2. The automatic sheet feeder according to claim 1, wherein a cross-sectional shape of the convex portion perpendicular to the sheet material feeding direction is tapered from the root to the tip. 3. The automatic paper feeder according to claim 2, wherein the convex portion has a substantially triangular cross-sectional shape. 4. The automatic sheet feeding according to claim 1, wherein the length of the convex portion parallel to the sheet material feeding direction is longer than the root length in the sectional shape of the convex portion perpendicular to the sheet material feeding direction. apparatus. 5. In the cross-sectional shape of the convex portion perpendicular to the sheet material feeding direction, the angle formed by the sheet material stacking surface side of the convex portion and the sheet material regulating surface of the side guide portion is substantially right angle or obtuse angle. The automatic paper feeder according to claim 1, wherein 6. The front end and the rear end of the convex portion with respect to the direction parallel to the sheet material feeding direction are shaped so as to converge on the sheet material regulating surface of the side guide portion.
Automatic paper feeder. 7. An automatic paper feeder according to claim 1, comprising:
A recording device, wherein recording information is recorded on a sheet material fed from the automatic paper feeding device. 8. A means for stacking sheet materials, a means for separating and feeding the sheet materials stacked on the stacking means one by one, and at least one left and right end portion of the sheet materials during separation and feeding. An automatic sheet feeding device having a side guide portion, wherein a gap is provided between a leading end of the side guide portion in the sheet material feeding direction and a sheet material stacking means. 9. The automatic paper feeder according to claim 8, wherein a taper is provided on the back side of the sheet material stacking surface at the front end of the side guide portion in the sheet material feeding direction.