JPH09240897A - Image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove a jammed paper sheet without any special rotational operation of a pinching roller by providing a guide member for guiding a medium on which an image is to be formed to be conveyed, and to be downward tilted toward a port side with the drawing operation of a paper feed cassette. SOLUTION: When a paper sheet is jammed in an automatic paper sheet reversing mechanism, a feed paper cassette 41 is drawn to this side. Therefore, guide rollers 88, 88 of a guide plate 65 are moved along horizontal surface parts 41b, 41b as guide surfaces of the upper surface parts of both side wall parts of the feed paper cassette 41 and inclined surface parts 41c, 41c while being rotated. The guide plate 65 is turned downward by taking supporting shafts 85, 85 as the center and tilted toward a port 2A side of the feed paper cassette 41, a lower roller 69b for refeeding is brought in contact with a stopper 89 and stopped when it is separated from a upper roller and lowered by the specified amount. An operator inserts his hand from the port 2A of the feed paper cassette 41, gripes the paper sheet on the guide plate 65, and takes out it to the outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus applied as, for example, an electrophotographic digital copying apparatus capable of double-sided copying.

[0002]

2. Description of the Related Art In this type of image forming apparatus, an image is formed on one side of a sheet by an image forming means, and then the sheet is conveyed to the image forming means again in a state of being inverted by an inversion conveying mechanism. An image is formed on the other side and both sides are copied.

At the time of this double-sided copy, the paper may be jammed in the reverse conveyance mechanism. In this case, the front cover of the apparatus body is opened, and the jammed paper is removed by inserting a hand through the opening formed in the front frame.

The reversing / conveying mechanism is provided with a pair of sandwiching rollers for sandwiching and conveying the paper. When the paper is jammed between the pair of sandwiching rollers, the handle attached to the sandwiching rollers is rotated by hand. The jammed paper is removed after sending the paper.

[0005]

However, in the prior art, since the front frame of the apparatus body is provided with a large window-shaped opening, there is a disadvantage that the strength of the apparatus body is lowered. Further, when the paper is jammed between the pair of holding rollers, the holding rollers are rotated to send out the paper, which takes time.

Therefore, the present invention provides an image forming apparatus capable of removing jammed paper without lowering the strength of the main body of the apparatus and without requiring special operation of rotating the gripping roller. To aim.

[0007]

In order to solve the above-mentioned problems, the present invention provides a device main body having an entrance / exit, and an image forming medium provided on the main body of the device. An image forming unit to be formed, a conveying unit to convey an image forming medium on which an image is formed by the image forming unit through the image forming unit, and an conveyer unit inserted so as to be freely inserted into and removed from an entrance of the apparatus main body. And a storage unit located below the storage unit for storing the image forming medium supplied to the image forming unit and the image forming medium conveyed by the conveying unit. And a guide member inclined downward toward the entrance / exit.

According to a second aspect of the present invention, an apparatus main body having an entrance / exit, an image forming unit provided in the apparatus main body for forming an image on one surface side of an image forming medium, and one surface formed by the image forming unit. And a conveying means for reversing the image forming medium on which the image is formed and then conveying it to the image forming means to form an image on the other surface side; Located in the lower part of the transport means,
An accommodating unit that accommodates the image forming medium supplied to the image forming unit and an image forming medium that is conveyed by the conveying unit are guided, and descends toward the entrance / exit side as the accommodating unit pulls out. And an inclined guide member.

According to a third aspect of the present invention, an apparatus main body having an entrance / exit, an image forming means for forming an image on an image forming medium, which is provided in the apparatus main body, and an image is formed by the image forming means. Conveying means for holding and conveying the image forming medium by a pair of holding rollers via the image forming means,
An accommodating unit that is inserted in and out of the entrance and exit of the apparatus main body, is located below the conveying unit, and accommodates an image forming medium supplied to the image forming unit, and an image conveyed by the conveying unit. While guiding the forming medium, one of the pair of holding rollers is held, and one of the pair of holding rollers is separated from the other by tilting downward toward the entrance / exit side in association with the withdrawing operation of the accommodating means. And a guide member.

According to a fourth aspect of the present invention, an apparatus main body having an entrance / exit, an image forming means for forming an image on an image forming medium provided in the apparatus main body, and an image is formed by the image forming means. A transporting means for transporting the image forming medium through the image forming means, and a member which is inserted into and out of the entrance and exit of the apparatus main body, is located below the transporting means, and is supplied to the image forming means. And a guide member for guiding the image forming medium conveyed by the conveying unit and descending and inclined toward the entrance / exit side by its own weight in association with the drawing operation of the accommodating unit. To do.

According to a fifth aspect of the present invention, an apparatus main body having an entrance / exit, an image forming unit provided in the apparatus main body for forming an image on an image forming medium, and an image is formed by the image forming unit. And a conveying means for conveying the image forming medium through the image forming means, and a member which is inserted into and out of the entrance of the apparatus main body, is located below the conveying means, and is supplied to the image forming means. An accommodating means for accommodating the image forming medium, and a guide surface which is formed in the accommodating means along the moving direction of the accommodating means and which is composed of a horizontal plane portion and an inclined surface portion,
A guide member for guiding the image forming medium conveyed by the conveying means, and a guide member provided on the guide member and supported by a guide surface of the accommodating means, and along the guide surface as the accommodating means pulls out. A guide roller that tilts the guide member toward the entrance / exit side by moving while rotating and moving the inclined surface portion of the guide surface.

According to a sixth aspect of the present invention, an apparatus main body having an entrance / exit, an image forming means for forming an image on an image forming medium provided in the apparatus main body, and an image is formed by the image forming means. A transporting means for transporting the image forming medium through the image forming means, and a member which is inserted into and out of the entrance of the apparatus main body and is located below the transporting means and is supplied to the image forming means. An accommodating means for accommodating the image forming medium, a guide member which guides the image forming medium conveyed by the conveying means, and is inclined downward toward the entrance / exit side as the accommodating means pulls out, and this guide member. And a stopper that limits the amount of downward movement of the container within a range that does not hinder the insertion of the housing means.

According to the present invention, a guide member for guiding the image forming medium conveyed by the conveying means is provided, and the guide member is inclined downward toward the entrance / exit side of the apparatus main body as the accommodating means is pulled out. As a result, the sheet jammed on the guide member is guided to the entrance / exit side of the apparatus body, and the jammed image forming medium can be removed from the entrance / exit side.

Further, one of the pair of gripping rollers of the conveying means is held by the guide member, and by the descending inclination of the guide member,
By separating one of the pair of holding rollers from the other, even when the image forming medium is jammed between the pair of holding rollers, the jammed image forming medium can be removed without special operation of the pair of holding rollers. To do so.

Further, a guide roller is provided on the guide member, and when the accommodating means is pulled out, the guide roller is moved along the guide surface of the accommodating means so that the accommodating means can be smoothly pulled out.

Further, by restricting the descending inclination amount of the guide member by the stopper within the range that does not hinder the insertion of the accommodating means, the accommodating means is surely inserted without colliding with the descending inclined guide member when the accommodating means is inserted. It can be so.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a sectional view showing the outline of an electrophotographic digital copying apparatus 1 as an image forming apparatus to which an automatic paper reversing mechanism is applied.

The electrophotographic digital copying apparatus 1 has an image reading unit 4 which functions as a reading unit and an image forming unit 6 which functions as an image forming unit. An upper portion of the image reading unit 4 is formed so as to be openable and closable with respect to a document table of the image reading unit 4, which will be described later.
The automatic document feeder (hereinafter, referred to as ADF) that feeds the documents one by one toward the document table and also functions as a document retainer for closely adhering the document D placed on the document table to the document table.
8 is set.

The image reading unit 4 has an upper part facing the closed ADF 8 and a platen 11 made of transparent glass on which a document D is set, and placed on one end of the platen 11. The table 11 has a size plate 12 indicating a reference position for setting the document D. A control panel (not shown) is arranged near the document table 11 surrounding the document table 11.

Below the document table 11, as an image reading section 4, an exposure lamp 13 for illuminating the document D placed on the document table 11, and light from the exposure lamp 13 is condensed on the document D. The auxiliary reflection plate 14 and the first mirror 15 that bends the reflected light from the document D to the left in the drawing are arranged. Exposure lamp 13, auxiliary reflector 14 and first
The mirror 15 is fixed to the first carriage 16,
The first carriage 16 is arranged so as to be movable in parallel with the document table 11 with the movement of the first carriage 16. The driving force of a pulse motor (not shown) is transmitted to the first carriage 16 via a toothed belt (not shown), and the first carriage 16 is moved in parallel along the document table 11.

The first mirror 15 on the left side of the document table 11 in the figure
In the direction in which the reflected light reflected by the guide is guided, a second carriage 20 is provided which is movable in parallel with the document table 11 via a drive mechanism (not shown) such as a toothed belt and a DC motor. There is.

The second carriage 20 has a first mirror 15
The second mirror 21 that bends the reflected light from the document D guided by the downward direction and the third mirror 2 that bends the reflected light to the right in the figure
2 are arranged at right angles to each other. Second carriage 20
Is driven by the first carriage 16 by a toothed belt or the like (not shown) that drives the first carriage 16, and is moved parallel to the document table 11 at a speed of 1/2 of the first carriage 16. It

The reflected light from the second carriage 20 is imaged at a predetermined magnification within the plane below the first carriage 16 and including the optical axis of the light reflected by the second carriage 20. An image forming lens 23 and a CCD image sensor 24 that converts the reflected light, which is focused by the image forming lens 23, into an electric signal, that is, image data, are arranged.

The image forming section 6 is a photosensitive drum 3 as an image bearing member rotatably positioned in the center of the copying apparatus 1.
It has 0. The photoconductor drum 30 is rotated at a predetermined rotation speed by a motor (not shown).

At a predetermined position around the photosensitive drum 30, a charger 31 for charging the surface of the drum to a predetermined electric charge is provided, and the surface of the photosensitive drum 30 is exposed to a laser beam corresponding to image data to expose the photosensitive drum. An optical scanning device that forms an electrostatic latent image on the surface of the drum 30, that is, a laser exposure device 32, serves as a developer on the electrostatic latent image formed on the surface of the photosensitive drum 30 by exposure by the laser exposure device 32. A developing device 33 having a developing roller 33a for supplying toner to develop at a desired image density, and a toner image formed on the photosensitive drum 30 on an image forming medium, that is, a copy sheet P fed from a sheet cassette described later. The paper P on which the toner image is transferred and the toner image is transferred to the photosensitive drum 3
A transfer / peeling charger 34 for separating from 0, a peeling claw 35 for peeling the copy sheet P from the surface of the photoconductor drum 30, a cleaning device 36 for cleaning the toner remaining on the surface of the photoconductor drum 30, and a photoconductor. Drum 30
The static eliminator 37, which eliminates the potential remaining on the surface of the
Are located.

At the bottom of the copying machine 1 located below the photosensitive drum 30, a multi-stage paper feeding device (hereinafter, referred to as a paper feeding means) is detachably mounted in a plurality of upper and lower stages from the front side of the copying machine 1. A PFP 40 is arranged integrally with the copying apparatus 1.

The PFP 40 includes an upper cassette 41, a middle cassette 42 and a lower cassette 43 for accommodating a plurality of types of copy sheets P of various sizes, and each of the cassettes 41, 42 and 43 is, for example, in the longitudinal direction. The A4 size copy sheet, the B4 size copy sheet and the A3 size copy sheet placed so as to be conveyed along are each formed to be able to store about 500 sheets.

Pickup rollers 44a, 44b and 44c are provided at predetermined positions of the upper cassette 41, the middle cassette 42 and the lower cassette 43 to take out the sheets P one by one from the cassettes 41, 42 and 43, respectively.

Each pickup roller 44a, 4
4b and 44c for each cassette 41, 42 and 4
A transport roller 45 for separating the sheets P one by one is provided at a position where the leading edge of the sheet P taken out from the sheet 3 is passed.
a, 45b and 45c, and separating rollers 46a, 46b and 46 integrally arranged with the respective conveying rollers.
c is arranged. The separation rollers 46a, 46b and 46c are arranged such that their axes are parallel to and in contact with and separated from each other by the transport rollers combined with each other, and are rotated in the direction opposite to the rotation direction of the transport rollers. By doing so, only the uppermost one sheet of the paper P taken out from each cassette is sent to the transport path described later.

On the right side of the PFP 40 in the figure, three sheets of frequently used paper P, for example, A4 size paper P, are placed.
A large-capacity feeder (hereinafter referred to as LCF) 47 that can store about 000 sheets is provided. LCF47
A pickup roller 48 that scatters the sheets P accommodated in the LCF 47 one by one is disposed at a predetermined position. A separating mechanism 49 including a pair of upper and lower conveying rollers 49a and a separating roller 49b is arranged between the pickup roller 48 and the photosensitive drum 30. The separation mechanism 49 connects the separation roller 49b to the transport roller 4
By rotating 9a in the opposite direction to the rotating direction, only the uppermost one sheet of the paper P taken out from the LCF 47 by the pickup roller 48 is sent to the transport path described later.

Above the LCF 47, each cassette 41,
Copy paper P independently of 42, 43 and LCF 47
A manual feed feeder 50 capable of feeding paper is formed. Between the manual feed feeder 50 and the photoconductor drum 30, a manual feed pickup roller 51 for taking in the paper P inserted in the manual feed feeder 50, a manual feed guide 52 for guiding the paper P taken in by the pickup roller 51,
Further, a conveyance roller 53 that conveys the sheet P guided toward the photosensitive drum 30 via the manual feed guide 52 is provided.

Between the respective cassettes 41, 42, 43 and LCF 47 and the photoconductor drum 30, there is a conveyance path 54 for the paper P for guiding the cassettes 41, 42, 43 and LCF 47 toward the photoconductor drum 30. Has been formed. The transport path 54 further extends to the outside of the copying apparatus 1 via a transfer area defined between the photosensitive drum 30 and the transfer / separation charger 34.
In addition, one of the cassettes or LC
A plurality of transport rollers 55 are provided for transporting the paper P fed from F or the manual feed guide toward the photoconductor drum 30.

In the vicinity of the photosensitive drum 30 on the conveying path 54 and on the upstream side, the copy sheet P guided along the conveying path 54.
Of the copy paper P at the same speed as the movement speed of the outer peripheral surface of the photoconductor drum 30, while correcting the inclination of the photoconductor drum 30 and aligning the front end of the toner image on the photoconductor drum 30 with the front end of the copy paper P.
An aligning roller 56 for feeding the sheet to the transfer area is provided. Further, on the front side of the aligning roller 56, that is, on the side of the transport roller 55, the aligning sensor 5 for detecting the arrival of the copy sheet P to the aligning roller 56.
6a is provided.

A conveyor belt 57 that conveys the paper P is incorporated in the direction in which the paper P that has passed through the transfer area advances. At the position where the paper P is conveyed by the conveyor belt 57 and the heat is less likely to be applied to the photoconductor drum 30, a pair of heat rollers whose roller surfaces are in pressure contact with each other is included and the toner image is transferred to the paper. A fixing device 58 for fixing the toner image on the paper P by heating the toner image and melting the toner image to press the toner image and the paper P is provided.

On the side wall of the copying machine 1 facing the fixing device 58, the paper P having the toner image fixed by the fixing device 58 is provided.
A discharge tray 59 for discharging is disposed. A discharge switching unit 60 is disposed between the fixing device 58 and the discharge tray 59 and guides the copy paper P, on which the toner image is fixed by the fixing device 58, to either the paper reversing portion or the discharge tray 59 described later. There is.

The discharge switching unit 60 is arranged between the first and first discharge rollers 61 and 62 for propelling the sheet P that has passed through the fixing device 58, and between the first and first discharge rollers 61 and 62. A distribution gate 63 that selectively distributes the copy paper P that has passed through the fixing device 58 to either the discharge tray 59 or the paper reversing mechanism 64 is provided.

The ADF 8 has a cover 71, and the cover 7
A rear edge of the copying machine 1 is attached to a rear edge of the upper surface of the copying apparatus 1 via a hinge device (not shown).
By rotating and displacing the entire DF 8, as described above, it is formed so as to be openable and closable with respect to the document table 11 of the image reading section 4.

A document feeding table 72 for holding a plurality of documents D is provided on the upper surface of the cover 71 slightly to the left. The documents D set on the document feed table 72 are sequentially taken out one by one on the left side of the document feed table 72 in the figure, that is, one end side of the ADF 8, and the document table 11 of the image reading unit 4 is read from the left end side in the figure. A pickup roller 73 for supplying to one end side of is arranged. An empty sensor 7 as a document detection sensor for detecting whether or not the document D is set on the document feed table 72 at a predetermined position of the document feed table 72.
2a is provided. A document width detection sensor (not shown) that functions similarly to the document position detection sensor 17 that detects the position where the document D is set on the document table 11 may be arranged on the document feed table 72.

In the original taking-out direction of the pickup roller 73, the paper feed roller 74 for feeding the original D taken out by the pickup roller 73 toward the original table 11 and the front end of the original D fed by the paper feed roller 74 are arranged. An aligning roller 75 for aligning is arranged. The document D is placed between the aligning roller 75 and the paper feeding roller 74.
An aligning sensor 75a for detecting the arrival of the aligning roller 75 on the aligning roller 75 is arranged.

Inside the cover 71, at a position facing the platen 11 of the image reading section 4 in a state where the ADF 8 is closed, a size that covers almost the entire platen 11 is given, and a pickup roller is provided. A conveyance belt 76 is arranged to convey the document D conveyed from the document feed table 72 through the document feed roller 74 and the aligning roller 75 to a predetermined position on the document table 11. The conveyor belt 76 is stretched over belt rollers 77 arranged in a pair on the left and right in the figure,
A belt driving mechanism (not shown) rotates the belt in the amount direction on the right side and the left side in the figure.

A conveyor belt 76 is provided on the right side of the ADF 8.
The reversing roller 78 that sends out the document D that is moved from the left side to the right side in the drawing toward the outside of the cover 71, and the document D that is conveyed by the pinch roller 79 that presses the document D against the reversing roller 78 again conveys the conveyance belt. A flapper 80 for switching between returning to 76 or discharging to a predetermined discharge position, that is, a cover 71, a discharge roller 81 for discharging the document D conveyed by the reversing roller 78 when the flapper 80 is switched to the discharge side, And the reversing roller 78
A jam sensor 82 for detecting a jam of the document is arranged.

On the other hand, the above-mentioned automatic paper reversing mechanism 64 is a reversing path 66 for reversing and guiding the front and back sides of the copy paper P which has passed through the transfer area and the fixing device 58, and a switchback system is used for copying without temporarily accumulating. A reversing conveyance path 68 that guides the sheet P to the aligning roller 56 again, and a pair of upper and lower re-feeding sheets that nips and conveys the sheet P guided to the reversing conveyance path 68 toward the aligning roller 56. It has an upper roller 69a and a lower roller 69b as holding rollers.

FIG. 1 is an enlarged view of the schematic structure around the automatic paper reversing mechanism 64 applied to the present invention. The upper sheet feeding cassette (sheet feeding means) 41 is inserted freely into and out of the entrance 2A at the lower front surface of the apparatus main body 2 and arranged directly below the automatic sheet reversing mechanism 64. The paper feed cassette 41 has guide rollers 41a, 41 on the outer surface of both side walls thereof,
By inserting the guide rollers 41a, 41 into the guide rails 83, 83 installed on both sides of the apparatus main body 2, the guide rollers 41a, 41 can be attached to and detached from the apparatus main body 2.

Paper feed cassette 4 inserted in the apparatus main body 2
A guide plate (guide member) 65 is provided in the upper part of the unit 1 for guiding the conveyance of the copy paper P while avoiding the copy paper P falling on the paper of the paper feed cassette 41 during the switchback. Brackets 8 are provided at both ends on the rear side of the guide plate 65.
Support shafts 85 and 85 are provided so as to project through the shafts 4 and 84, and the guide plate 65 is rotatably supported on both side wall portions of the apparatus main body 2 through the support shafts 85 and 85. A lower roller 69b for re-feeding is rotatably attached to one side of the upper surface of the guide plate 65 via brackets 86, 86. Guide rollers 88, 88 are attached to both ends on the front side of the guide plate 65 via attachments 87, 87. The guide plate 65 is supported by the upper surfaces of both side wall portions of the paper feed cassette 41 via the guide rollers 88, 88. The upper surfaces of both side wall portions of the paper feed cassette 41 are guide surfaces, and the guide surfaces have a horizontal surface portion 41b and a curved inclined surface portion 41c, and when the paper feed cassette 41 is pulled out, the guide plate 65 The guide rollers 88, 88 are horizontal plane portions 41b
And moves while rotating along the inclined surface portion 41c.
When the guide rollers 88, 88 move on the inclined surface portion 41c, the guide plate 65 pivots downward about the support shafts 85, 85 and inclines toward the entrance / exit 2A side of the sheet feeding cassette 41.

A stopper 89 is provided on the upper surface of the guide rails 83, 83 for stopping the descending guide plate 65 at a position where it does not descend from the sheet feeding cassette 41, and the stopper 89 is lowered when the sheet feeding cassette 41 is inserted. The sheet feeding cassette 41 is not brought into contact with the guide plate 65 in the above.

However, when the automatic sheet reversing mechanism 65 reverses and conveys the sheet, the sheet is jammed between the upper and lower rollers 69a and 69b for re-feeding, or the upper and lower rollers 69a completely. , 69b, and may be jammed in a state of falling on the guide plate 65.

Next, the operation of removing the jammed paper in the automatic paper reversing mechanism 65 will be described. First, as shown in FIGS. 3 and 5, from the state in which the paper feed cassette 41 is set in the apparatus main body 2, the paper feed cassette 41 is pulled out as shown in FIGS. 4 and 6. As a result, the guide rollers 88 of the guide plate 65 are moved to the paper feed cassette 41.
A horizontal surface portion 41b which is a guide surface of the upper surface portion of both side wall portions of
It moves while rotating along 41b and the inclined surface portions 41c, 41c. Guide rollers 88, 88 of the guide plate 65
Is moved along the inclined surface portions 41c, 41c, the guide plate 65 pivots downward about the support shafts 85, 85 to incline toward the inlet / outlet 2A side of the sheet feeding cassette 41 and re-feed the sheet. When the lower roller 69b for the vehicle is separated from the upper roller 69a and lowered by a predetermined amount, the stopper 89
Stopped in contact with. After that, the operator inserts his / her hand through the entrance / exit 2A of the paper feed cassette 41 to insert the guide plate 6
Grasp the paper P on the sheet 5 and take it out.

After the paper P is removed in this manner, the paper feed cassette 41 is reinserted. By this insertion, the guide rollers 88, 88 of the guide plate 65 are moved to the paper feed cassette 41.
The inclined surface portion 41c which is the guide surface of the upper surface portion of both side wall portions of the
41c Further, it moves while rotating along the horizontal plane portions 41b, 41b. The guide rollers 88, 88 have the inclined surface portion 41.
By moving along c and 41c, the guide plate 65
Rotates upward around the support shafts 85, 85 to return the lower roller 69b to a position where it is pressed against the upper roller 69a.

As described above, when the sheet feeding cassette 41 is pulled out, the guide plate 65 is rotated downward and inclined toward the doorway 2A side of the sheet feeding cassette 41. By inserting a hand, the jammed paper can be grasped and removed.

Therefore, unlike the prior art, it is not necessary to form an opening for removing jammed paper in the front frame of the apparatus body 2, and the strength of the apparatus body 2 is not reduced.
Further, since the lower re-feeding roller 69b is held on the guide plate 65, the lower re-feeding roller 69b is simultaneously separated from the upper roller 69a when the guide plate 65 is rotated downward.

Therefore, even if the paper is jammed between the lower roller 69b for re-feeding and the upper roller 69a, the lower roller 69b and the upper roller 69a need not be operated by another operation.
Jam paper can be removed and workability is excellent.

Further, on the guide plate 65, the paper feed cassette 4
Guide rollers 88, 8 that come into contact with the upper surface portions of both side wall portions of No. 1
8 is provided, the paper feed cassette 41 can be smoothly slid and moved in and out.

Further, the stopper 8 is provided on the guide rail 83.
9 is provided to prevent the guide plate 65 from rotating downward when the paper feed cassette 84 is completely removed so that the paper feed cassette 41 does not open. There is also no risk of contact with the guide plate 65 and damage.

[0054]

As described above, according to the present invention, the guide member for guiding the image forming medium conveyed by the conveying means is provided, and the guide member is connected to the entrance / exit side of the apparatus main body along with the drawing operation of the paper feeding means. The image forming medium jammed on the guide member can be guided to the entrance / exit side of the apparatus main body and removed from the entrance / exit by only pulling out the paper feeding means.

Therefore, the operation of removing the jammed image forming medium is facilitated, the opening of the jammed image forming medium is not required in the apparatus body, and the strength of the apparatus body is not reduced. .

Further, one of the pair of gripping rollers of the conveying means is held by the guide member, and by the descending inclination of the guide member,
Since one of the pair of holding rollers is separated from the other, even if the image forming medium is jammed between the pair of holding rollers, the jammed image forming medium can be removed without special operation of the pair of holding rollers. Removal work becomes easy.

Further, since the guide roller is provided on the guide member and the guide roller is moved along the guide surface of the sheet feeding means when the sheet feeding means is pulled out, the sheet feeding means can be smoothly pulled out.

Further, since the amount of downward inclination of the guide member is regulated by the stopper within a range that does not hinder the insertion of the sheet feeding means, the sheet feeding means may collide with the downwardly inclined guide member when inserting the sheet feeding means. It can be inserted without fail.

[Brief description of drawings]

FIG. 1 is a perspective view showing an automatic paper reversing mechanism and a paper feed cassette according to an embodiment of the present invention.

FIG. 2 is an internal configuration diagram showing an electrophotographic digital copying apparatus.

FIG. 3 is a perspective view showing a state in which a guide plate is horizontally supported on a paper feed cassette.

FIG. 4 is a perspective view showing a state where the paper feed cassette is pulled out and the guide plate is inclined downward.

FIG. 5 is a side view showing a state where a guide plate is horizontally supported on a paper feed cassette.

FIG. 6 is a side view showing a state where the paper feed cassette is pulled out and the guide plate is inclined downward.

[Explanation of symbols]

D ... manuscript, P ... copy paper (image forming medium), 1 ... copying device, 2 ... device body, 2A ... entrance / exit, 4 ... image reading part, 6 ... image forming part, 8 ... ADF, 11 ... manuscript table, 12
... size plate, 13 ... exposure lamp, 14 ... auxiliary reflector, 1
5 ... 1st mirror, 16 ... 1st carriage, 17 ... Document position detection sensor, 20 ... 2nd carriage, 21 ... 2nd mirror, 22 ... 3rd mirror, 23 ... Imaging lens, 24 ... CC
D image sensor, 30 ... Photosensitive drum, 31 ... Charging charger, 32 ... Laser exposure device, 33 ... Developing device, 3
3a ... Developing rollers 33a, 34 ... Transfer / peel charger, 35 ... Peel claws, 36 ... Cleaning device, 37 ... Static eliminator, 40 ... PFP, 41 ... Upper cassette, 41b ...
Horizontal plane portion (guide surface), 41c ... Inclined surface portion (guide surface), 42 ... Middle cassette, 43 ... Lower cassette, 44
a, 44b, 44c ... Pickup rollers, 45a, 4
5b, 45c ... Conveying rollers, 46a, 46b, 46c ...
Separation roller, 47 ... LCF, 48 ... Pickup roller, 49 ... Separation mechanism, 49a ... Conveyor roller, 49b ... Separation roller, 50 ... Manual feed feeder, 51 ... Pickup roller, 52 ... Manual feed guide, 53 ... Conveyor roller, 54
... transport path, 55 ... transport roller, 56 ... aligning roller, 56a ... aligning sensor, 57 ... transport belt,
58 ... Fixing device, 59 ... Ejection tray, 60 ... Ejection switching unit, 61 ... First ejection roller, 62 ... Second ejection roller, 63 ... Sorting gate, 64 ... Automatic paper reversing mechanism,
65 ... Guide plate (guide member), 66 ... Inversion path, 68 ...
Reverse conveyance path, 69a ... Re-feeding upper roller, 69b ... Re-feeding lower roller, 71 ... Cover, 72 ... Original document feeding table, 72a ...
Empty sensor, 73 ... Pickup roller 74 ... Paper feeding roller, 75 ... Aligning roller, 75a ... Aligning sensor, 76 ... Conveying belt, 77 ... Belt roller, 78 ... Reversing roller, 79 ... Pinch roller, 80 ... Flapper, 81 ... Paper ejection roller, 82 ... Jam sensor, 83
… Guides, 87… rollers, 87… stoppers.

Claims (6)

[Claims] 1. An apparatus main body having a doorway, an image forming unit provided in the apparatus main body for forming an image on an image forming medium, and an image forming medium on which an image is formed by the image forming unit. A conveying unit that conveys the image through the image forming unit, and an image forming medium that is inserted in and out of the entrance and exit of the apparatus main body, is located below the conveying unit, and is supplied to the image forming unit. An image, comprising: a storage unit; and a guide member that guides the image forming medium that is transported by the transport unit, and that is inclined downward toward the entrance / exit side when the storage unit is pulled out. Forming equipment. 2. An apparatus main body having a doorway, an image forming unit provided in the apparatus main body for forming an image on one side of an image forming medium, and an image is formed on the one side by the image forming unit. And a conveying means for reversing the image forming medium and conveying it again to the image forming means to form an image on the other surface side; and a conveying means which is inserted in and out of the entrance of the apparatus main body to a lower portion of the conveying means. An accommodating unit that is located and accommodates the image forming medium that is supplied to the image forming unit, and guides the image forming medium that is conveyed by the conveying unit, and moves to the entrance / exit side as the accommodating unit pulls out. An image forming apparatus comprising: a guide member that is inclined downwardly. 3. An apparatus main body having an entrance / exit, an image forming unit provided in the apparatus main body for forming an image on an image forming medium, and an image forming medium on which an image is formed by the image forming unit. Conveying means for sandwiching and conveying by means of a pair of clamping rollers via the image forming means, and a member which is inserted in and out of the entrance and exit of the apparatus main body, is located below the conveying means, and is supplied to the image forming means. An accommodating means for accommodating the image forming medium, and an image forming medium conveyed by the conveying means are guided, and one of the pair of sandwiching rollers is held, and is brought to the entrance / exit side with the withdrawing operation of the accommodating means. And a guide member that separates one of the pair of holding rollers from the other by inclining downwardly toward the image forming apparatus. 4. An apparatus main body having an entrance / exit, an image forming unit provided in the apparatus main body for forming an image on an image forming medium, and an image forming medium on which an image is formed by the image forming unit. Conveying means for conveying through the image forming means, and an image forming medium to be inserted into and removed from the entrance and exit of the apparatus main body, located below the conveying means, and supplied to the image forming means. And a guide member that guides the image forming medium conveyed by the conveying unit and that is inclined downward toward the entrance / exit side by its own weight in association with the drawing operation of the accommodating unit. Image forming apparatus. 5. An apparatus main body having an entrance / exit, an image forming unit provided in the apparatus main body for forming an image on an image forming medium, and an image forming medium on which an image is formed by the image forming unit. A conveying unit that conveys the image through the image forming unit, and an image forming medium that is inserted in and out of the entrance and exit of the apparatus main body, is located below the conveying unit, and is supplied to the image forming unit. An accommodating means, a guide surface formed in the accommodating means along a direction in which the accommodating means moves in and out, the guide surface including a horizontal plane portion and an inclined surface portion; It is provided on a guide member and supported by a guide surface of the accommodating means, and moves while rotating along the guide surface with the withdrawing operation of the accommodating means, and moves an inclined surface portion of the guide surface. It allows the image forming apparatus characterized by comprising a guide roller for tilting the guide member toward the entrance side. 6. An apparatus main body having a doorway, an image forming unit provided in the apparatus main body for forming an image on an image forming medium, and an image forming medium on which an image is formed by the image forming unit. A conveying unit that conveys the image through the image forming unit, and an image forming medium that is inserted in and out of the entrance and exit of the apparatus main body, is located below the conveying unit, and is supplied to the image forming unit. An accommodating unit, a guide member that guides the image-forming medium conveyed by the conveying unit, and is inclined downward toward the entrance / exit side when the accommodating unit pulls out, and a descending amount of the guide member is stored in the accommodating unit. An image forming apparatus comprising: a stopper that restricts the insertion of the means within a range that does not hinder the insertion of the means.