JPH06156786A - Paper feeding device for copying machine - Google Patents

Abstract

PURPOSE:To simplify the structure and prevent double feed by guiding the lower edge part of a transfer paper sheet into the nipping part between rollers by a guide member and holding the paper sheet in an aslantly arranged state on the outer peripheral surface of a reverse roller. CONSTITUTION:When a guide roller 33 is revolved in the reverse revolutional direction from the state where the lower edge part of a transfer paper sheet 36 is placed on the upper surface of a guide plate 41, the guide plate 41 revolves around a supporting shaft 40. Accompanied with the revolution of the guide plate 41, the lower edge part of the copying paper sheet 36 is held in an aslantly arranged state on the outer peripheral surface of a reverse roller 34. When the feed roller 33 is revolution-driven in the paper feeding direction, the reverse roller 34 is followingly revolved, and the transfer paper sheet 36 in the foremost row intrudes into a nipping part 39. Further, when the second or the succeeding transfer paper sheet intrudes into the nipping part 39, the following revolution of the reverse roller 34 is suspended. Then, the transfer paper sheet 36 in the foremost rank is sent into a transfer part side by the feed roller 33, and the intrusion of the second or the succeeding paper sheet into the nipping part 39 is suppressed by the reverse roller 34.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a feed roller for feeding a transfer sheet toward a transfer section and a reverse roller below the image forming section, and sets the transfer sheet in a vertical shape. The present invention relates to a sheet feeding device of a copying machine which is designed to be smaller and thinner.

[0002]

2. Description of the Related Art Conventionally, there is a copying machine disclosed in Japanese Unexamined Patent Publication No. 56-27184, which is designed to be downsized and thinned by setting a transfer paper vertically. In the above method, a paper feed roller is pressed against one side of the upper end of the vertically set transfer paper, and the rotation of the paper feed roller feeds the transfer paper to a transfer unit provided above.

[0003]

In this copying machine, it is necessary to increase the pressure contact force of the sheet feeding roller in order to improve the transportability of the transfer sheet toward the sheet feeding section. When the pressure contact force is increased, the separability between the transfer sheets is lowered and double feeding is likely to occur. On the other hand, if the pressure contact force of the paper feed roller is reduced in order to improve the separability between transfer sheets and prevent double feeding, skew will occur and registration will be poor.

Therefore, in the above-mentioned copying machine, the range of the pressure contact force of the sheet feeding roller for favorably feeding the transfer sheet is narrowed, and the pressure contact force of the sheet feeding roller is adjusted so as to adjust the quality of the transfer sheet or work. It needs to be done frequently depending on the environment (humidity and temperature).

[0005]

The invention according to claim 1 is
A feed roller and a reverse roller pressed against the outer peripheral surface of the feed roller are arranged below the image forming section, and a transfer sheet to be fed toward the transfer section is set in a vertical shape. A copying machine in which the reverse roller is rotated together when the rotational force acting on the roller in the sheet feeding direction is equal to or larger than a set value and the rotation of the reverse roller is stopped when the rotational force is equal to or smaller than the set value. A guide for guiding the lower end of the transfer paper toward the nip between the feed roller and the reverse roller, and holding the lower end of the transfer paper in a slanted state on the outer peripheral surface of the reverse roller. The members are provided.

According to a second aspect of the present invention, in the transfer sheet according to the first aspect of the invention, the feed roller is disposed obliquely above the reverse roller, and a nip portion between the feed roller and the reverse roller is set. The lower end was made to face diagonally upward.

According to a third aspect of the invention, in the invention according to the first or second aspect, the transfer sheet set by the reverse roller being rotated by the feed roller in the sheet feeding direction is attached to the nip side. A moving mechanism for moving the guide member in the urging direction is provided.

[0008]

According to the first aspect of the present invention, when the feed roller rotates in the sheet feeding direction without the transfer sheet entering the nip portion, the reverse roller is rotated along with the rotation of the reverse roller in the sheet feeding direction. As a result, the transfer paper, the lower end of which is obliquely arranged on the outer peripheral surface of the reverse roller, is called toward the nip portion side, and the frontmost transfer paper sheet enters the nip portion. After the frontmost transfer paper has entered the nip portion, the rotation of the reverse roller is stopped because the rotational force that acts on the reverse roller from the feed roller becomes less than the set value.
The transfer paper is fed by rotating the feed roller and the transfer paper is separated by stopping the rotation of the reverse roller.

According to the second aspect of the invention, by disposing the feed roller and the reverse roller in this way,
The transfer paper is called to the nip portion by the accompanying rotation of the reverse roller described in the first aspect of the invention, and the transfer paper is separated and fed by the feed roller and the reverse roller.

According to the third aspect of the invention, the reverse roller is slightly rotated in the paper feeding direction by the feed roller immediately after the feeding of one transfer sheet is completed, and at this time, the guide member is moved by the moving mechanism. At the same time, the transfer member is urged toward the nip portion by the guide member, so that the transfer paper can be smoothly called to the nip portion by the reverse roller.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. First, FIG. 2 is an external perspective view showing the overall structure of the copying machine 1 according to the present invention. The front cover 3 is attached to the front part of the main body case 2 so as to be openable and closable in the front-rear direction. A document transport case 4 is attached to the upper part.

Next, FIG. 1 is a vertical cross-sectional side view of the copying machine 1, in which a drive roller 5 is provided at a substantially central portion of the main body case 2.
A photosensitive belt 8 wound around the transfer roller 6 and the cleaning roller 7 in a vertically long shape is provided. Around the photoconductor belt 8, a charger 9 for uniformly charging the surface of the photoconductor belt 8, a selfoclens array 10 for forming a latent image on the surface of the photoconductor belt 8, and this latent image. A developing unit 11 for making visible, a transfer unit 12 for transferring the made visible image to a transfer paper described later, a cleaning unit 13 for removing the toner remaining on the surface of the photoconductor belt 8, and a charge for removing the surface of the photoconductor belt 8. A static eliminating lamp 14 and the like are provided. The developing unit 11 is composed of a toner tank 11a, an agitator 11b, a blade 11c, a stirring roller 11d, and a developing roller 11e, and the cleaning unit 13 is provided on the photosensitive belt 8 at a position facing the cleaning roller 7. It is formed by a cleaning blade 13a pressed against the surface and a toner tank 13b containing the discharged toner. An image forming portion is formed by the photoconductor belt 8, various members 9 to 14 provided around the photoconductor belt 8 and an optical system member described later, and the transfer roller 6 and the transfer device 1 are formed.
And 2 form a transfer portion.

Guide plates 15, 16 for forming a transport path for a document (not shown) are provided in the document transport case 4.
, Two driven rollers 17 and 18 for conveying the original, a grip roller 19 formed of a sponge member for gripping the manually inserted original, and a mylar 20 for pressing the discharged original.
And are provided. Here, an inner cover 21 is provided inside the front cover 3, and side guides 22 are attached to both sides of an upper end side of the inner cover 21 to guide both sides of a document manually fed to the side guide 22. A manual feed guide portion 23 and a paper discharge guide portion 24 that guides both sides of the discharged document are formed.

At the upper part of the main body case 2, a lower guide plate 25 facing the guide plate 15 and forming a document conveying path, and drive rollers 26 and 27 pressed against the driven rollers 17 and 18, A sensor 28 for detecting the leading edge of the manually fed document is provided. A contact glass 29 is supported on the lower guide plate 25 between the driving rollers 26 and 27. Further, a lamp 30 for exposing the original on the contact glass 29, a reflector 31 for condensing the light from the lamp 30 onto the SELFOC lens array 10, and a lamp 30.
A light-shielding plate 32 is provided to prevent light from the light from directly going to the photoconductor belt 8 side.

Below the image forming portion in the main body case 2, a feed roller 33 and a reverse roller 34 are provided with their outer peripheral surfaces pressed against each other.
A transfer paper setting space 37 for vertically setting a transfer paper 36 is formed between the main body case 2 and a guide plate 35 provided inside the main body case 2 on the back side of the copying machine 1. Has been done. The main body case 2 is formed with a plurality of ribs 38 projecting toward the transfer paper setting space 37 side and long in the vertical direction. At the lower end of the transfer paper setting space 37 and at a position facing the nip 39 between the feed roller 33 and the reverse roller 34, a guide member that is vertically rotatable around a support shaft 40. A plate 41 is provided.

Here, the guide plate 41 is shown in FIG.
Alternatively, the substantially horizontal position shown by the solid line in FIG.
(D) or the transfer paper 36 is rotated on the substantially vertical position shown by the chain double-dashed line in FIG. 6 and placed on the guide plate 41 which is in a substantially horizontal state as shown in FIG. 5 (a). The transfer paper 36 is placed vertically, and the lower end side of the transfer paper 36 is bent toward the nip portion 39 side along the rib 38. The upper surface of the guide plate 41 on which the lower end of the transfer paper 36 is placed has a friction resistance determined by blasting. On the other hand, from the state shown in FIG. 5A, the guide plate 41 is moved around the support shaft 40 by the arrow a.
When the transfer paper 36 is rotated in the direction, the transfer paper 36 slides down on the guide plate 41 toward the nip portion 39 due to the rotating action of the guide plate 41, the self-weight of the transfer paper 36, and the bending force of the ribs 38. ) And (d), the lower end portion is obliquely arranged on the outer peripheral surface of the reverse roller 34, and is held by the guide plate 41 in this state. When the rotational force in the sheet feeding direction acting on the reverse roller 34 from the feed roller 33 is equal to or larger than a set value, the reverse roller 34 is rotated together and the rotational force is equal to or smaller than the set value. In this case, the torque limiter 42 for stopping the reverse rotation of the reverse roller 34
(Shown in FIGS. 7 and 8). In particular,
If there is no transfer paper 36 between the reverse roller 34 and the feed roller 33, or if there is only one transfer paper 36 between them, the reverse roller 34 will move to the feed roller 33.
And two or more transfer papers 36
If there is, the reverse rotation of the reverse roller 34 is stopped.

Next, a gear 44 is fixed to the rotary shaft 43 of the reverse roller 34, a gear 45 meshing with the gear 44 and a rack 46 meshing with the gear 45 are provided, and the rack 46 is a gear. It is arranged so as to slide in the vertical direction with the rotation of 45. Further, a boss 47 and a pin 48 are fixed to the rack 46, and a long groove 49 vertically long in which the boss 47 slidably engages, and a groove 50 in which the pin 48 slidably engages. Is formed on the body case 2. The groove 50 is
The guide plate 41 is formed in a substantially elliptical shape having two straight portions that are long in the vertical direction and two inclined portions, and the rear end portion of the guide plate 41 extends to a position where it is placed on the upper portion of the pin 48. Has been done. Then, by rotating the feed roller 33 in the reverse rotation direction (arrow b direction) from the state shown by the solid line in FIG. 6, the reverse roller 34 rotates in the reverse rotation direction (arrow b ₁ direction).
The gear 44 is integrally rotated in the direction of the arrow b _{1 as} it is rotated along with the gear 45, the gear 45 meshing with the gear 44 is rotated in the direction of the arrow b ₂ and the rack 46 meshing with the gear 45 is raised. . The guide plate 41 is lifted by the pins 48 as the rack 46 rises,
The guide plate 41 rotates around the support shaft 40 to the position shown by the chain double-dashed line, and the lower end of the transfer paper 36 is obliquely arranged on the outer peripheral surface of the reverse roller 34 as shown in FIG. 5C. It

Next, when the feed roller 33 is rotated in the paper feeding direction (direction of arrow c) for feeding paper, the reverse roller 34 is rotated by the feed roller 33 and is fed in the paper feeding direction (direction of arrow c ₁ ). The transfer paper 36 whose lower end portion is obliquely arranged on the outer peripheral surface of the reverse roller 34 moves to the nip portion 39 side in accordance with this rotation, and the frontmost transfer paper 36 enters the nip portion 39. When the frontmost transfer paper 36 enters the nip 39 and the leading ends of the second and subsequent transfer papers enter the nip 39, the rotational force transmitted from the feed roller 33 to the reverse roller 34 becomes less than or equal to the set value. Therefore, the reverse rotation of the reverse roller 34 is stopped, the frontmost transfer sheet 36 is conveyed by the feed roller 33 that is rotationally driven, and the second and subsequent transfer sheets 36 are transferred by the reverse roller 34 that has stopped rotating.
The occurrence of double feeding is prevented by preventing the conveyance of the. Therefore, the amount of rotation of the reverse roller 34 due to the rotation in the sheet feeding direction is small, and the reverse roller 34 is rotated.
At the same time, the gear 44 slightly rotates in the direction of arrow c ₁ so that the rack 46 meshed with the gear 45 slightly descends. With this descending, the guide plate 41 slightly rotates around the support shaft 40 in the direction of arrow a ′. The guide plate 41 is rotated, and the tip portion of the guide plate 41 urges the transfer paper 36 toward the nip portion 39 side with this rotation. Then, as the reverse roller 34 is rotated by the feed roller 33 in the sheet feeding direction, the guide plate 41 is rotated so as to urge the transfer sheet 36 set at the sheet feeding position toward the nip portion 39. Moving mechanism 51 to move
Is formed by the gears 44 and 45 and the rack 46.

Further, a sensor 52 for detecting the transfer paper 36 fed by the feed roller 33 and the reverse roller 34 on the front side of the transfer portion, and an image transferred on the transfer paper 36 at the transfer portion is fixed. Fixing roller 5
3 and a pressure roller 54, a separation claw 55 that separates the transfer paper 36 after fixing from the fixing roller 53, and a discharge guide plate 56 that guides the separated transfer paper 36 onto the opened front cover 3. Is provided below the image forming unit. Further, above the fixing roller 53, a cooling means 57 is provided for preventing deterioration of the photosensitive belt 8 due to heat from the fixing portion.

Next, the power transmission system in the copying machine 1 will be described with reference to FIGS. 7 and 8. First, the relay gear 60 meshes with the motor gear 59 fixed to the rotary shaft of the pulse motor 58, and the relay gear 60 includes the photoconductor drive roller gear 61 and the relay gear 62 fixed to the rotary shaft of the drive roller 5. It is in mesh. Relay gear 6
A document conveying clutch gear 64 fixed to the rotating shaft of the drive roller 27 is meshed with the relay gear 63 via the relay gear 63,
A document conveying gear 66 fixed to the rotary shaft of the drive roller 26 is meshed with the document conveying clutch gear 64 via an intermediate gear 65. A timing belt 69 is wound between the motor gear 59, the developing relay gear 67, and the paper feeding / fixing relay gear 68, and the outer periphery of the timing belt 69 has a tight toner 7 for preventing loosening.
0 is abutted. The developing relay gear 67 has a developing roller gear 7 fixed to the rotation shaft of the developing roller 11e.
1 meshes with the feed / fixing relay gear 68, relay gears 72 and 73 mesh with each other, one relay gear 72 meshes with a fixing gear 74 fixed to the rotating shaft of the fixing roller 53, and the other relay gear 72 meshes with the other relay gear. 73 is the feed roller 3
Feed roller clutch gear 7 fixed to the rotating shaft of 3
5 are in mesh. A one-way clutch (not shown) is provided on each of the photoconductor drive roller gear 61, the development relay gear 67, and the relay gear 72 to prevent reverse rotation.

In such a structure, first, the setting and feeding of a document will be described. Insert both sides of the document to be copied into the manual guide portion 23 of the side guide 22.
And insert it between the grip roller 19 and the lower guide plate 25 by manual insertion so that the leading edge of the document is the drive roller 2
6 is pushed to a position where it abuts the nip portion between the driven roller 17 and the driven roller 17. When this manual feed is performed, the driving rollers 26 and 27 are rotationally driven to start the conveyance of the document after a lapse of a certain time after the leading edge of the document is detected by the sensor 28, but the grip roller 19 is provided. As a result, even if the hand is released from the original before the driving rollers 26 and 27 are rotationally driven, the original is prevented from falling. Further, when the leading end of the original is brought into contact with the nip portion, the original can be bent in front of this nip portion, and even if the hand is released from the original before the driving roller 26 is rotationally driven, the grip roller 19 causes The bending is maintained, and the absence of feeding of the document is prevented by the bending.

The original conveyed while being held between the driving roller 26 and the driven roller 17 is the contact glass 2
An image is read on the driving roller 2 and
7 and the driven roller 18 are also gripped and conveyed, and after being reversed along the document conveyance path, the paper is ejected while being guided by the paper ejection guide portions 24 of the side guides 22 on both sides thereof, and the inner cover 21 is stacked on a document stacker 21a formed integrally with the document stacker 21a. It should be noted that since the original conveying path is designed to span so that the trailing edge of the original is positioned at the B section when the leading edge of the discharged original reaches the A section in FIG. In addition, the discharged document is prevented from being dropped and damaged.

When making a plurality of copies of the same original, the original conveying clutch gear is set immediately before the rear end of the original passes between the driving roller 27 and the driven roller 18 based on the detection signal from the sensor 28. The clutch of 64 is disengaged to temporarily stop the rotation of the drive rollers 26 and 27. Then, after discharging the transfer paper 36, the pulse motor 58 is rotated in the reverse direction and the clutch is engaged.
The document is retracted by reversing 27. After a lapse of a fixed time after the retracted document is detected by the sensor 28, the pulse motor 58 is again rotated in the normal direction and the driving rollers 26 and 27 are driven in the normal rotation direction to convey the document, thereby copying the same document again. To do.

Next, setting and carrying of the transfer paper 36 will be described. A predetermined number of transfer papers 36 are inserted through an opening 76 formed between the upper rear part of the main body case 2 and the document carrying case 4, and the transfer papers 36 are inserted as shown in FIG.
The lower end of the is placed on the upper surface of the guide plate 41. In this state, the lower end side of the transfer paper is the rib 3 of the main body case 2.
A state of being bent toward the nip portion 39 side along 8 is provided.

When the feed roller 33 is rotated in the reverse direction (the direction of arrow b shown in FIG. 6) from this state, the rack 46 ascends via the gears 44 and 45 as described above,
When the pin 48 fixed to the rack 46 abuts against the lower surface of the guide plate 41 and pushes it up, the guide plate 41 rotates around the support shaft 40 in the direction of arrow a as shown in FIG. 5B. With the rotation of the guide plate 41, the action of the rotation of the guide plate 41, the weight of the transfer paper 36, and the rib 3
When the transfer paper 36 slides down from the guide plate 41 due to the bending force of the transfer paper 36 by 8 and the guide plate 41 is rotated to a substantially vertical position, the lower end portion of the transfer paper 36 as shown in FIG. Are obliquely arranged on the outer peripheral surface of the reverse roller 34 and are held in the obliquely arranged state by the guide plate 41.

In this state, the transfer paper 36 has not yet entered the nip portion 39. Therefore, as shown in FIG. 5C, when the feed roller 33 is rotationally driven in the paper feeding direction, the reverse roller 34 is rotated and the transfer paper 36 obliquely arranged on the outer peripheral surface of the reverse roller 34 is nipped. The transfer paper 36 at the frontmost part is called into the part 39 side and enters the nip part 39. Further, after the leading end portions of the second and subsequent transfer sheets 36 have entered the nip portion 39,
As shown in FIG. 5D, the rotation of the reverse roller 34 along with it is stopped. Then, the foremost transfer paper 36 is fed toward the transfer unit side by the feed roller 33 which continues to rotate, and the second and subsequent transfer papers 36 are nipped by the reverse roller 34 which stops rotating.
The transfer paper 36 is prevented from entering and the double feeding of the transfer paper 36 is prevented.

When the sensor 52 detects the leading end of the transfer paper 36 fed by the feed roller 33, the rotation of the feed roller 33 is temporarily stopped and the timing is synchronized with the image written on the photosensitive belt 8. Then, the image is transferred to the transfer paper 36 in the transfer section again. The transfer paper 36 on which the image has been transferred is discharged onto the front cover 3 which is opened after being fixed in the fixing unit.

Next, when the transfer paper 36 is being fed by the feed roller 33 and the leading end of the second and subsequent transfer papers 36 is in the nip 39, the reverse rotation of the reverse roller 34 is stopped. However, immediately after the trailing end of the fed transfer paper 36 has passed through the nip 39, the feed roller 33 and the reverse roller 34 are pressed against each other, so that the reverse roller 34 is moved in the paper feeding direction. The next transfer paper 36 starts to be conveyed while being rotated. Further, the leading end of the next transfer paper 36 is the nip portion 3
When the reverse roller 34 is moved into the position 9, the reverse rotation of the reverse roller 34 is stopped again. Therefore, although the amount of rotation of the reverse roller 34 during this period is small, the gears 44 and 45 rotate with this rotation and the rack 46 slightly moves downward via the gears 44 and 45. Therefore, the pin 48 that is in contact with the lower surface of the guide plate 41 is not
1, the guide plate 41 is rotated around the support shaft 40 in the direction of returning to the horizontal position (direction of arrow a ′), and at this time, the tip end of the guide plate 41 causes the transfer paper 36 to move to the nip portion 39.
By pushing so as to move to the side, the transfer paper 36 to the nip portion 39 due to the accompanying rotation of the reverse roller 34.
Is called smoothly.

When the rack 46 descends, the pin 48 descends in the inclined portion of the groove 50, and the rack 46 gradually inclines in the direction in which the rack 46 releases the mesh with the gear 45. When the transfer paper 36 is exhausted, the guide plate 41 is largely rotated in the arrow a'direction by its own weight, and the rack 46 whose pin 48 is pushed by the guide plate 41 is disengaged from the gear 45. Then, the rack 46 and the guide plate 41 return to the initial position shown by the solid line in FIG.

[0030]

As described above, according to the first aspect of the present invention, the feed roller and the reverse roller pressed against the outer peripheral surface of the feed roller are arranged below the image forming section and are fed toward the transfer section. When the transfer paper to be paper is set vertically, and when the rotational force in the sheet feeding direction that acts on the reverse roller from the feed roller is equal to or greater than the set value, the reverse roller is rotated together and the rotational force is equal to or less than the set value. In the case of, in the copying machine in which the rotation of the reverse roller is stopped, the lower end portion of the transfer paper is guided toward the nip portion between the feed roller and the reverse roller, and the lower end portion of the transfer paper is moved. Since the guide member for holding the reverse roller in a slanted state on the outer peripheral surface is provided, the feed roller can be fed in a state where the transfer paper does not enter the nip portion. When it is rotated to, the transfer sheet skewed by the reverse roller that is rotated together can be called to the nip side, and the frontmost transfer sheet can be drawn into the nip section. Not only can it be used as a calling roller, but a dedicated calling roller is not required, and the structure can be simplified.In addition, the transfer paper at the forefront enters the nip area and the tip of the second and subsequent transfer papers is After entering the nip part, the rotation of the reverse roller can be stopped to prevent double feeding of the second and subsequent transfer sheets, and further, the paper is fed downward from the lower end of the transfer sheet. Even when the transfer paper quality and work environment are different, the transfer paper can be separated and fed stably.

As described above, the invention according to claim 2 is the invention according to claim 1, wherein the feed roller is disposed obliquely above the reverse roller and the nip portion between the feed roller and the reverse roller is set. The feed roller and the reverse roller are arranged in such a manner as to be opposed to the lower end portion of the transfer sheet in an obliquely upward direction. It is possible to call the transfer paper to the nip side and to achieve stable separation and feeding of the transfer paper by the feed roller and the reverse roller.

As described above, the third aspect of the present invention nips the transfer sheet set in accordance with the first or second aspect of the invention when the reverse roller is rotated by the feed roller in the sheet feeding direction. Since the moving mechanism for moving the guide member in the direction of urging the sheet is provided, the reverse roller is slightly rotated in the paper feeding direction by the feed roller immediately after the feeding of one transfer sheet is completed. At this time, the guide member can be moved by the moving mechanism and the transfer sheet can be urged toward the nip portion side by the guide member. Therefore, the transfer sheet can be more smoothly called to the nip portion side by the reverse roller. It has the effect of being able to do so.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing the overall structure of a copying machine.

FIG. 3 is a vertical cross-sectional side view showing a document transport path side in an enlarged manner.

FIG. 4 is a vertical cross-sectional side view showing a transfer path side of a transfer sheet in an enlarged manner.

FIG. 5 is a side view showing a process of feeding the set transfer paper to a nip portion.

FIG. 6 is a side view showing a further enlarged structure of the paper feeding unit.

FIG. 7 is a front view showing a power transmission system in the copying machine.

FIG. 8 is a development view showing a power transmission system in a copying machine.

[Explanation of symbols]

 1 Copying Machine 33 Feed Roller 34 Reverse Roller 36 Transfer Paper 39 Nip 41 Guide Member 51 Moving Mechanism

Claims (3)

[Claims] 1. A feed roller and a reverse roller pressed against the outer peripheral surface of the feed roller are arranged below the image forming section, and a transfer sheet to be fed toward the transfer section is set vertically, and When the rotational force in the sheet feeding direction that acts on the reverse roller from the feed roller is equal to or greater than the set value, the reverse roller is rotated together, and when the rotational force is equal to or less than the set value, the rotation of the reverse roller is stopped. In the copying machine, the lower end of the transfer paper is guided toward the nip portion between the feed roller and the reverse roller, and the lower end of the transfer paper is obliquely arranged on the outer peripheral surface of the reverse roller. A sheet feeding device for a copying machine, which is provided with a guide member for holding the state. 2. A feed roller is disposed diagonally above a reverse roller, and a nip portion between the feed roller and the reverse roller is diagonally upwardly opposed to a lower end portion of a set transfer paper. The sheet feeding device of the copying machine according to claim 1. 3. A moving mechanism is provided for moving the guide member in a direction for urging the transfer sheet set toward the nip side as the reverse roller is rotated in the sheet feeding direction by the feed roller. Claim 1 or 2 characterized
Paper feeder of the copying machine described.