JPH0930679A - Paper transport device - Google Patents

Abstract

(57) An object of the present invention is to make it possible to quickly remove a sheet when a jam occurs in a side registration type sheet conveying device. A vertical guide plate 103 is attached to one side of a lower guide plate 102. Drive roll 10
5 and the pinch roll 107 are cantilevered by the vertical guide plate 103 so that the paper 38 can be conveyed along the vertical guide plate 103. The upper guide plate 71 has a hole 6 formed in the vertical guide plate 103 with one protruding portion 71A.
It is loosely fitted to the position 1 so that it can rotate about this point. At the time of removing the jam, the knob 77 is turned to release the fixation of the other protruding portion 71B of the upper guide plate 71, and the end side is lifted to generate a sufficient space in the conveyance path.
The paper 38 is pulled out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet transporting apparatus for transporting cut sheets such as a copying machine and a printer, and more particularly to a flat plate-shaped sheet which restricts the sheet from moving to the upper side of the transporting path. The present invention relates to a sheet conveying device having a chute.

[0002]

2. Description of the Related Art In an image forming apparatus such as a copying machine or a printer, an image is transferred to or transferred from a roll paper cut by a cutter in the apparatus or a paper cut into a predetermined size in advance. The image is fixed. In such an image forming process, the cut sheet is conveyed by a roller or a belt along a comparatively long conveying path in the apparatus, so that the conveying direction may be gradually deviated to cause skew feeding (skew).

If a skew occurs before the transfer of the image, for example, the ruled lines to be printed in parallel with the upper edge of the paper and the characters on each line are printed with an inclination, which deteriorates the appearance of the document. Also, if this conveyance is performed in a state in which it is inclined at a predetermined angle from the original conveyance direction of the paper, the corner of the paper may be caught in the conveyance path due to the oblique feed, and jam (paper jam) may occur. In this respect also, inconvenience occurs.

Therefore, conventionally, there has been proposed a paper transportation method called a side registration method.
In this method, a vertical guide plate is erected upright along the conveyance path, and the side edges of the sheet are conveyed along this side to prevent the occurrence of skew.

FIG. 12 shows an essential part of this side registration type sheet conveying device. The sheet conveying device includes a lower guide plate 10 having a predetermined width and formed with a plurality of streak-like protrusions along the sheet 101 conveying direction.
2 are arranged. On the left side of the lower guide plate 102 in the drawing, a vertical guide plate 103 is erected so as to be in contact with it. At a predetermined position of the vertical guide plate 103, a drive roll 105 having a gear 104 for transmitting a driving force attached to one end is cantilevered. That is, a blanket (not shown) pivotally supports both ends of the rotation shaft of the drive roll 105 and is fixed to a predetermined position of the vertical guide plate 103. The gear 104 is adapted to receive the transmission of a driving force from a motor for conveyance (not shown).

A pinch roll 107 is arranged on the drive roll 105 so as to be in rolling contact therewith. The pinch roll 107 is also cantilevered by the vertical guide plate 103, but its rotation axis is slightly inclined in the direction of the vertical guide plate 103. As a result, the rolls 105 and 107 are sandwiched by the rolls 105 and 107, and the conveyance direction 108 indicated by the arrow is indicated.
The sheet 101 conveyed to the sheet advances along the vertical guide plate 103 evenly from the front end to the rear end of the left end portion thereof, and skew is prevented.

An upper guide plate 111 is arranged in parallel with the lower guide plate 102 at a slight distance in the conveying path along which the sheet 101 is conveyed. This upper guide plate 11
One end of 1 is bent 90 degrees to form a vertical guide plate 103.
It is fixed with a screw 112. The other end is also fixed by a screw 113 to a convex portion 102A arranged in a bank shape on the side portion of the lower guide plate 102. Upper guide plate 111
Has a notch near the position where the pinch roll 107 is arranged.

[0008]

In such a side registration type sheet conveying apparatus, since it is not necessary to dispose the drive roll 105 and the pinch roll 107 over the entire width of the conveying path, it is possible to convey the sheet 101. There is an advantage that the mechanism can be configured easily.
However, when the sheet 101 becomes a jam under the upper guide plate 111 for some reason, it is difficult to remove it. That is, even if the user tries to pull out the sheet portion protruding from the upper guide plate 111 and pull it out in the conveying direction 108 or in the opposite direction, the sheet 101 is relatively strongly sandwiched between the drive roll 105 and the pinch roll 107, so that the sheet is pulled out. It was difficult, and if you tried to pull it out forcibly, it often broke on the way. Paper 101
If the paper is torn on the way, the broken pieces will be left between the upper guide plate 111 and the lower guide plate 102, which will cause a jam when the new paper 101 is conveyed next.

Therefore, in the conventional sheet conveying apparatus, the screws 112 and 113 at two places are removed to remove the upper guide plate 111, and the torn sheet portion is removed. However, since the screw 112 fastened to the vertical guide plate 103 exists in a recessed portion inside the apparatus such as the image forming apparatus, it may take time to remove and reattach the screw 112 from the occurrence of the jam to the restoration. There was a problem that it would take a considerable amount of time.

SUMMARY OF THE INVENTION An object of the present invention is to enable a side registration type sheet conveying device to quickly remove a sheet.

[0011]

According to a first aspect of the present invention, (a) a vertical guide plate which is erected along one end of a sheet conveying path, and (b) an entire one side portion of the vertical guide plate. A conveyance roller that conveys the paper so that
(C) A flat plate-like member that regulates the upward movement of the surface of the sheet conveyed by the conveying rollers, and the end located on the side opposite to the vertical guide plate is the end on the vertical guide plate side. A sheet guide device is provided with a horizontal guide plate that is rotatable upward as a fulcrum.

That is, according to the first aspect of the present invention, the horizontal guide plate arranged horizontally with respect to the vertical guide plate for side registration is rotatably arranged upward with the end portion on the vertical guide plate side as a fulcrum. By doing so, the jammed paper or the like can be pulled out toward the front side, thereby enabling quick processing.

According to the second aspect of the present invention, (a) a vertical guide plate that is erected along one end of the sheet conveyance path, and (b)
A conveying roller that conveys the paper along one side along the vertical guide plate, and (c) a flat plate-shaped member that regulates the upward movement of the surface of the paper conveyed by the conveying roller. A horizontal guide plate whose end located on the side opposite to the vertical guide plate is rotatable upward with the end on the vertical guide plate side as a fulcrum, and (d) this horizontal guide plate The sheet conveying device is provided with fixing means for fixing the opposite end portion in the state of being kept as needed.

That is, according to the second aspect of the invention, the horizontal guide plate arranged horizontally with respect to the vertical guide plate for performing the side registration is rotatable upward with the end portion on the vertical guide plate side as a fulcrum. In addition, the other end is always fixed by a mechanism such as a lever. When it is necessary to remove the paper on the conveyance path due to a jam or the like, you can release this fixing and lift the fixed side upward, put your hand in the space created by this and pull out the paper. .

According to the third aspect of the present invention, (a) a lower guide plate for moving the paper along the upper surface thereof, and (b) a vertical guide plate erected along one end of the lower guide plate,
(C) A conveyance roller that conveys the paper along one side along this vertical guide plate, and (d) Vertically at a predetermined position higher than the length corresponding to the thickness of the paper from the lower guide plate. A hole formed in the guide plate, and (e) a flat plate-shaped upper guide plate that is rotatably arranged within a predetermined angle range from a horizontal position with one end of this hole being loosely fitted and this loosely fitted portion being a fulcrum. And are provided in the paper transport device.

That is, according to the third aspect of the invention, the vertical movement of the paper is restricted by the upper guide plate and the lower guide plate, and the horizontal movement (skew) is made to follow the entire one side of the paper by the vertical guide plate. In the device that regulates so that a hole is made at a predetermined position of the vertical guide plate, one end of the upper guide plate is loosely fitted in the hole, and the upper guide plate is rotated about the loosely fitted portion as a fulcrum. By doing so, the paper on the transport path can be pulled out.
One end of the upper guide plate may be directly inserted into a hole formed in the vertical guide plate, or a predetermined tubular member may be fitted into this hole and the upper guide plate may be inserted into the hole. One end may be loosely fitted.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to Examples.

FIG. 1 shows an outline of the configuration of a printer using a sheet conveying device according to an embodiment of the present invention. The printer 10 is capable of feeding three systems. The first is a standard size sheet 13 sent from a cassette tray 12 that is detachably arranged on the bottom of the printer body 11. For the cassette tray 12, one can be selected from a plurality of cassette trays 12 according to the paper size. The second type is a sheet (not shown) that is manually inserted from the manual sheet feeding port 14. For example, thick paper or paper other than the standard size paper is manually fed from here. Thirdly, an envelope cassette (not shown) is inserted into the envelope cassette insertion port 15. In this case, the envelopes stacked in the envelope cassette are delivered one by one.

On the front upper side of the cassette tray 12, a half-moon feed roll 18 is arranged via a duplex conveying path 17. When the half-moon feed roll 18 rotates at a predetermined timing, the duplex conveying path 1
The half-moon-shaped portion passes through a notch portion (not shown) of FIG. 7 and comes into contact with the uppermost sheet 13 of the cassette tray 12 to start its delivery. A registration roll pair 19 is arranged on the upstream side of the photosensitive drum 19 in the printer body 11.

The paper 13 delivered from the cassette tray 12 is sequentially fed by the feed roll pairs 21 and 22 and conveyed to the position of the registration roll pair 19. Further, the sheet manually fed from the manual sheet feeding port 14 is sent out by the feed roll 24, then passes through the feed roll pair 22 and then the registration roll pair 19
It is designed to be transported to the location. Further, the envelope cassette sent out from the envelope cassette set in the envelope cassette insertion port 15 is conveyed to the position of the registration roll pair 19 via the feed roll pair 22.

FIG. 2 shows in principle the periphery of the photosensitive drum. A transfer roll 31 for setting a transfer potential is arranged below the photosensitive drum 19 in the figure. Further, a charging roll 32 for imparting electric charges is arranged on the upper left side of the photosensitive drum 19. The photoconductor drum 19 rotates at a constant speed in a clockwise direction 33 indicated by an arrow, and a laser beam 35 modulated by an image signal is applied to the drum surface on which the electric charge is uniformly applied by the charging roll 32. It will be irradiated. At this time, the electric charge of the portion irradiated with the laser beam 35 is discharged, the electric charge of the other portion is held, and an electrostatic latent image corresponding to the image is formed. This electrostatic latent image is developed by the magnetic roll 37 arranged near the drum surface on the downstream side of the charging roll 32, and a toner image is created. The transfer roll 31 is a recording sheet 3 fed from one of the sheet feeding means such as the cassette tray 12.
The toner image is transferred to the image forming device 8. In this specification, the term recording paper 38 refers to the cassette tray 1
Not only the sheet 13 sent from the sheet 2, various sheets such as the envelope described above are used as a generic name.

The recording paper 38 to which the toner image has been transferred by the transfer roll 31 reaches the fixing device 39, passes between the heat roll 41 and the pressure roll 42, and is fixed. Even after the transfer of the toner image, the photosensitive drum 19
The toner particles remaining on the top are scraped off by the cleaning blade 44 that comes into contact with the surface of the drum, and cleaning is performed. After the cleaning, the charging roller 32 uniformly applies the electric charge to the drum surface for the next electrostatic latent image formation.

On the other hand, the recording paper 38 reflected from the fixing device 39 shown in FIG. 1 is conveyed upward in the printer body 11 by the conveying roll pair 46 and the discharging roll pair 47, and is discharged onto the discharging tray 48. It has become.
In this apparatus, the duplex transport path 17 is connected to the exit-side transport path of the fixing device 39 and has an inverted Y shape. This is to pull back the recording paper 38 that has been partially discharged to the discharge tray 48 by the discharge roll pair 47, and to start the duplex unit 4 from the inverted Y-shaped portion.
This is for realizing double-sided printing by entering the duplex conveying path 17 via the line 9.

The duplex unit 49 is detachably attached to the printer body 11. The duplex unit 49 is provided with a drive mechanism for transporting the recording paper, and drives the built-in transport roll pair based on a drive control signal obtained from the printer body 11. The duplex unit 49 is an optional component installed according to the customer's request, and when it is mounted, double-sided printing is possible. Only the one-sided printing is possible when the duplex unit 49 is not attached.

A scanner unit 51 is arranged in the printer body 11 between the fixing device 39 and the discharge tray 48. The scanner unit 51 includes a polygon mirror 5 that deflects a laser beam emitted from a laser (not shown).
An optical component such as a polygon motor 53 for rotating the 2 at a high speed and mirrors 54, 55 for reflecting the deflected laser beam are incorporated. The laser beam 35 reflected by the mirror 55 at the subsequent stage repeatedly scans the photosensitive drum 35 in the axial direction thereof as described with reference to FIG. 2, thereby forming an electrostatic latent image. The photosensitive drum 19, the charging roll 32, and the magnetic roll 37 shown in FIG.
The developing device including the cleaning device and the cleaning device including the cleaning blade 44 are integrated in the print cartridge 57 and can be replaced as consumable parts.

FIG. 3 shows an essential part of a sheet conveying device used in a printer having such a structure.
The same parts as those in FIG. 12 are designated by the same reference numerals, and the description thereof will be appropriately omitted. Such a side-registration type sheet conveying device is arranged everywhere in front of the photosensitive drum 19 (FIG. 1) in this printer, and is used to correct the posture of the recording sheet 38.

In FIG. 3, a drive roll 105 and a pinch roll 107 are both supported by a cantilever on a vertical guide plate 103. In addition, at the same height as the position where the pinch roll 107 is attached on the vertical guide plate 103, and at a position slightly away from this attachment position in the conveyance direction 108, a rectangular shape having the conveyance direction 108 as a long side is formed. Hole 61
Is being worn. Into the hole 61, a tubular member 62 having a sectional shape that fits into the hole 61 is press-fitted. The depth of the tubular member 62 is longer than the thickness of the vertical guide plate 103 by a predetermined length, and this lengthened portion projects to the back surface side of the vertical guide plate 103, which cannot be seen in FIG.

FIG. 4 shows the appearance of this tubular member. The bottom plate portion 62A of the tubular member 62 has a shape shifted toward the front side (right side in the drawing) by a certain length, and has a shape protruding from the top plate portion 62B. A pin 63 is planted in the central portion of this protrusion. Although the tubular member 62 is made of metal in this embodiment, it may be made of plastic.

FIG. 5 shows the shape of the upper guide plate of this embodiment. The upper guide plate 71 is a flat metal plate having a rectangular shape as a whole, but has protrusions 71A on both sides.
71B, and the place 72 where the pinch roll 107 shown in FIG. 3 is arranged is cut out. In addition, an elongated hole 73 for inserting the pin 63 shown in FIG. 3 is formed in the vicinity of the one protruding portion 71A.

The upper guide plate 71 has one protruding portion 71.
Insert A into the hole 61 shown in FIG.
3 is placed horizontally while positioning so as to project.
At this time, the other protruding portion 71B is placed on the convex portion 102A arranged in a bank shape on the side portion of the lower guide plate 102.
A positioning plate 75 is erected at a predetermined position of the convex portion 102A, and a knob 77 rotatable in the direction of arrow 76 is arranged in the vicinity thereof. Projection 71B of upper guide plate 71
The upper guide plate 71 can be fixed by pressing one side of the plate against the positioning plate 75, rotating the knob 76, and letting the bottom part of the knob 76 ride on the protruding part 71B as shown in the figure.

FIG. 6 shows in principle the state in which the sheet conveying apparatus conveys the recording sheet. The recording paper 38 is conveyed in a state in which the lower guide plate 102 and the upper guide plate 71 regulate the vertical direction and one side of the recording paper 38 is pressed against the vertical guide plate 103 by the action of the pinch roll 107. At this time, the protruding portion 71B on the right side of the upper guide plate 71 in the drawing is fixed so as to be sandwiched between the knob 77 and the convex portion 102A. Since this drawing is an end view, the other protruding portion 71 is not shown, but penetrates the vertical guide plate 103.

FIG. 7 shows the front side of the upper guide plate (right side in the figure).
It shows the state of lifting. When a jam occurs under the upper guide plate 71 for some reason, the knob 77 is rotated to release the restraint on the protruding portion 71B. Then, the other protruding portion 71 not shown in this figure
Using A as a fulcrum, the protruding portion 71B side of the upper guide plate 71 is lifted up as indicated by arrow 79. As a result, a space sufficient for the operator's hand to enter is created between the lower guide plate 102 and the upper guide plate 71. Therefore, the worker can easily remove the recording paper 38 by pulling it toward the front side, that is, in the direction of the arrow 81. In this direction, even if a force is applied to the recording paper 38, the phenomenon that the drive roll 105 and the pinch roll 107 are hung up and rotate and resist the removal of the recording paper 38 over a long distance does not occur. These drive roll 105 and pinch roll 107
Holds the back side of the recording paper 38, and pulling it out to the front pulls these in the axial direction, so these restraints can be easily released.

FIG. 8 shows the function of the tubular member when the upper guide plate is not lifted.
When the upper guide plate 71 is not lifted, the top plate portion 62B of the tubular member regulates the upward movement of the protruding portion 71A, and the bottom plate portion 62A regulates the downward movement thereof.

FIG. 9 shows the function of the tubular member when the upper guide plate is lifted. The upper guide plate 71 is lifted by rotating around the elongated hole 73 into which the pin 63 is inserted. The rotatable angle θ at this time is related to the position of the rear end of the bottom plate portion 62A, the position of the front end of the top plate portion 62B, and the distance between these two plate-shaped members.

Modification

FIG. 10 shows the relationship between the tubular member and the upper guide plate in the first modification of the present invention. Although the vertical guide plate is not shown in this figure, the front surface of the device, that is, the end surface of the tubular member 92 on the side facing the upper guide plate 91 is flush with the front surface of the vertical guide plate. Is formed. In this modification, a pin 93 is planted on the inner surface of the tubular member 92, and the protruding portion 91A of the upper guide plate 91 is inserted into the elongated hole 9 for positioning.
4 are pierced.

In the sheet transporting device of the first modified example, the jam on the transport path can be removed by lifting the protruding portion 91B side of the upper guide plate 91 to the upper side shown by the arrow 79. Further, in this modified example, since the portion corresponding to the bottom plate portion 62A (see FIG. 4) in the embodiment does not project in the transport path, the recording paper 38 can be transported smoothly. Although the bottom plate portion 62A projects into the conveying path in the previous embodiment, the height of the nip portion between the drive roll 105 and the pinch roll 107 is the bottom plate portion 62A.
Since it is sufficiently lower than A, the recording sheet 38 does not collide with the bottom plate portion 62A.

FIG. 11 shows the relationship between the tubular member and the upper guide plate in the second modification of the present invention. The tubular member 95 is provided with a protruding portion 95A projecting to the front side of the apparatus similarly to the tubular member 62 of the previous embodiment shown in FIG. 4, and a positioning pin 96 is planted in this portion. There is. Although the illustration of the vertical guide plate is omitted in this figure,
The front end surface of the tubular member 95 excluding the protruding portion 95A is the same as the front surface of the vertical guide plate.

On the other hand, the upper guide plate 97 is bent so that the protruding portion 97A loosely fitted in the opening of the tubular member 95 is higher than the other portions, and the pin 9 is formed in this portion.
An elongated hole 98 for inserting 6 is made. This second
Also in the modified example, the jam on the transport path can be removed by lifting the protruding portion 97B side of the upper guide plate 97 to the upper side shown by the arrow 79. Further, in this modified example, the protruding portion 95A as in the embodiment is arranged in the transport path, but even if the protruding portion 97A is placed on this, the other portion of the upper guide plate 97 becomes the protruding portion 95A. They will be arranged at the same height or a height lower than this. Therefore, even if the protruding portion 95A is projected in the transport path, it does not hinder the transport of the recording sheet.

In the above-described embodiments and modified examples, one protruding portion of the upper guide plate is loosely fitted to the cylindrical member, and the upper guide plate is rotated around this portion as a fulcrum to remove the recording paper. Although it is possible, it goes without saying that a plurality of protrusions of the upper guide plate may be arranged on the vertical guide plate side. In the embodiment and the modified example, the tubular member is inserted into the hole formed in the vertical guide plate, but the protrusion is directly inserted into the hole provided in the vertical guide plate without using the tubular member. It may be configured as described above. Further, it is possible to apply a commonly used hinge structure to this portion.

Further, in the embodiment, the other projecting portion 71B of the upper guide plate 71 is fixed by rotating the knob 77, but a screw having a relatively large head portion which can be easily rotated and removed by a finger is used. It may be used and fixed. In addition, the protruding portion 71B of the upper guide plate 71 is moved downward by 90 degrees.
A groove having a depth capable of accommodating at least the protruding portion 71B is provided on the protruding portion 102A (see FIG. 3) facing the protruding portion 102A and fixed to the protruding portion 71B side by its own weight. You may do it. It goes without saying that there may be a plurality of protrusions 71B, and they may both be bent downward by 90 degrees.

Since the embodiment does not consider the relationship between the thickness of the upper guide plate 71 and the gap between the bottom plate portion 62A and the top plate portion 62B of the tubular member 62 shown in FIG. , I will add some consideration to this. The gap between the bottom plate portion 62A and the top plate portion 62B in the surface direction is A, and the thickness of the upper guide plate 71 is B. In order to reduce the possibility of swinging in the vertical direction when the protruding portion 71A of the upper guide plate 71 is inserted in the tubular member 62, it is desirable that the gap A be substantially equal to the thickness B. There is such a request when the insertion form as shown in FIG. 4 is adopted. However, when the protrusion 71A is inserted and attached, the bottom plate portion 62 in FIG.
The distance C between the opposing gaps between A and the top plate portion 62B must be larger than the thickness B.

As described above, when it is not necessary to adopt the insertion form in which the gap A has to have the thickness B substantially equal to each other, that is, the other protruding portion 71B is predetermined so that the upper guide plate 71 can maintain the horizontal state. When it can be fixed on a member having the height of, the form of FIG. 11 or 12 can be adopted.

[0044]

As described above, according to the first aspect of the invention, the horizontal guide plate of the sheet conveying device for side registration of the sheet is rotated upward with the end portion on the side of the vertical guide plate as the fulcrum. I made it possible. Therefore, the jammed paper or the like can be easily removed with one end of the horizontal guide plate being lifted. Moreover, since the paper can be pulled out along the axial direction of the transport roll, there is an advantage that the processing is simplified and speeded up.

According to the second aspect of the present invention, the horizontal guide plate is rotatably arranged upward with the end on the vertical guide plate side as a fulcrum, and the end on the opposite side is a mechanism such as a lever. I always fixed it. Therefore, even when a device having a paper transport device incorporated therein is transported, the position of the horizontal guide plate does not change, and the reliability of transporting the paper is not impaired. Further, when a jam occurs, an operator can easily access the transport path by releasing the fixing of the fixing means.

Further, according to the third aspect of the invention, the vertical movement of the paper is restricted by both the upper guide plate and the lower guide plate, and the horizontal movement (skew) of the paper is applied to the vertical guide plate. In a device that regulates the entire one side along a vertical guide plate, a hole is formed at a predetermined position in the vertical guide plate, and one end of the upper guide plate is loosely fitted in this hole, and the loosely fitted portion is used as a fulcrum. The guide plate was opened so that the paper on the transport path could be pulled out. Therefore, while satisfying the original guide function of the upper guide plate with a simple mechanism that uses the vertical guide plate itself to open and close the upper guide plate,
It is possible to meet the request of the worker's access to the transport path.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an outline of a configuration of a printer using a sheet conveying device according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing the periphery of a photosensitive drum of the printer shown in FIG.

FIG. 3 is a perspective view showing a main part of the sheet conveying apparatus according to the present exemplary embodiment.

FIG. 4 is a perspective view showing the appearance of a tubular member used in this embodiment.

FIG. 5 is a perspective view showing an appearance of an upper guide plate used in this embodiment.

FIG. 6 is an end view showing in principle a state in which a sheet conveying device is conveying a recording sheet.

FIG. 7 is an end view showing a state in which a front side of an upper guide plate is lifted to remove a recording sheet.

FIG. 8 is a cross-sectional view of an essential part showing the function of the tubular member when the upper guide plate is not lifted.

FIG. 9 is a cross-sectional view of an essential part showing the function of the tubular member in a state where the upper guide plate is lifted.

FIG. 10 is a perspective view showing a relationship between a tubular member and an upper guide plate according to a first modified example of the present invention.

FIG. 11 is a perspective view showing a relationship between a tubular member and an upper guide plate according to a second modified example of the present invention.

FIG. 12 is a perspective view showing a main part of a conventionally used side registration type sheet conveying device.

[Explanation of reference numerals] 11 ... Printer main body, 61 ... Hole, 62, 92, 95 ... Cylindrical member, 62A ... Bottom plate portion, 63, 93, 96 ... Pin,
71, 91, 97 ... Upper guide plate, 71A, 71B, 91
A, 91B, 95A, 97A, 97B ... Projection portion, 73,
94, 98 ... elongated holes, 75 ... positioning plate, 77 ... knob,
103 ... Vertical guide plate, 105 ... Drive roll, 10
7 ... Pinch roll

Claims (3)

[Claims] 1. A vertical guide plate erected along one end of a paper transport path, a transport roller for transporting the paper along one side of the vertical guide plate, and a transport roller for transporting the paper. A flat plate-like member that regulates upward movement of the surface of the sheet conveyed by the rollers, and an end located on the side opposite to the vertical guide plate is upward with the end on the vertical guide plate side as a fulcrum. And a horizontal guide plate that is freely rotatable. 2. A vertical guide plate standing upright along one end of a paper transport path, a transport roller for transporting the paper so that one side part is entirely along the vertical guide plate, and this transport A flat plate-like member that regulates upward movement of the surface of the sheet conveyed by the rollers, and an end located on the side opposite to the vertical guide plate is upward with the end on the vertical guide plate side as a fulcrum. A sheet conveying apparatus, comprising: a horizontal guide plate which is rotatable in a horizontal direction; and a fixing means for fixing an end portion located on the opposite side at any time in a state where the horizontal guide plate is kept horizontal. apparatus. 3. A lower guide plate for moving the paper along the upper surface thereof, a vertical guide plate erected along one end of the lower guide plate, and one side part entirely along the vertical guide plate. And a transport roller for transporting the sheet, a hole formed in the vertical guide plate at a predetermined position higher than the length corresponding to the thickness of the sheet from the lower guide plate, and one end of the hole is loosened. A sheet conveying device, comprising: a flat upper guide plate that is fitted and rotatably arranged within a predetermined angle range from a horizontal position with the loosely fitted portion as a fulcrum.