JPH0319142B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention (first invention, second invention) relates to an automatic paper feeder that is capable of inserting manual sheet feeding in the middle of automatic paper feeding. .

[Technical background of the invention]

Figures 1 and 2 show a known automatic paper feeding device shown in Japanese Utility Model Application Publication No. 58-53644.
is used by being attached to the printing device 2. That is, in FIG. 1, reference numeral 3 denotes a paper holding section that holds a plurality of sheets of paper 4a in a stack, and this holding section 3 is provided with a feed roller 5 that feeds out the sheets of paper 4a one by one from the top. The paper 4a sent out by the delivery roller 5 is supplied between the platen 6 on the printing device 2 side and the pinch rollers 7a, 7b, and is further wound around the platen 6 by the rotation of the platen 6 itself. Printed by the print head. Also, the printed paper 4b is placed on the platen 6.
and a bail roller 8 that presses against the bail roller 8, and is discharged by rotation of the platen 6. The ejected sheets 4b are held between a pair of ejecting rollers 10a and 10b provided in the stocker section 9, and as these rollers rotate, they are received in the stocker 11 and held in a stack.

In addition, when manually feeding single sheets during such automatic sheet feeding, the printed sheets 4b held in a stack in the stocker 11
The stocker section 9 is then largely rotated rearward about the shaft 12 of the delivery roller 5, and the locking mechanism 13 locks the stocker section 9 in the rotational position to bring it into the state shown in FIG. In this state, the cut sheet 14 can be manually inserted directly between the platen 6 and the pinch roller 7a from above, and then the platen 6 can be inserted directly between the platen 6 and the pinch roller 7a.
It is wound around the platen 6 by its own rotation, and printed by the printing head. The printed cut sheet 14 is then held between the platen 6 and the bail roller 8, and is discharged by rotation of the platen 6.

Next, FIG. 3 shows a known automatic paper feeding device shown in Japanese Utility Model Publication No. 58-32937, and this device 21 is also used by being attached to the printing device 2. That is, a plurality of sheets of paper 4a are held in a stack in the cassette 22, and the sheets of paper 4a fed out one by one by the feed roller 23 are guided to the back surface of a guide plate 24, and further guided to a silencer 25 which also serves as a guide section. It is then supplied between the platen 6 and pinch rollers 7a and 7b on the printing device 2 side, wrapped around the platen 6, and printed by the printing head. Further, the printed paper 4b is held between the platen 6 and the bail roller 8, and is discharged by rotation of the platen 6. The ejected paper 4b passes between the silencer 25 and the transparent cover 26, and then passes through the guide plate 24.
and another guide plate 27 located above it, and are held between the paper discharge rollers 28a and 28b, received in the stocker 29, and held in a stacked manner.

Next, when manually feeding a cut sheet, rotate the upper guide plate 27 significantly backwards and manually insert the cut sheet 14 from between the lower guide plate 24 and the silencer 25. do.

(Problems with the Background Art) When manually feeding paper in the automatic paper feeder shown in FIGS.
It was necessary to rotate it significantly backwards.

Accordingly, it has been desired to eliminate the need for the troublesome operation of largely rotating such relatively large components.

Further, when manually feeding paper, the insertion position of the paper 14 is not clear, so there is a risk of erroneous insertion. In other words, in the apparatus shown in FIGS. 1 and 2, the paper 14 must be inserted between the platen 6 and the pinch roller 7a, but since there is no guide when inserting the paper, the insertion operation is difficult. In the above device, there was a risk of erroneous insertion if it was inserted between the silencer 25 and the transparent cover 26.

On the other hand, automatic paper feeders are generally attached to office machines using locking mechanisms or screws.
When using a locking mechanism, the locking part provided on the automatic paper feeder side and the locked part provided on the office machine side are engaged with each other, so when installing or removing, the locking part is not locked. It is necessary to move it to a position away from the stop, making operation cumbersome. It goes without saying that the screw fastening method is even more troublesome to operate, and it feels like it is far from a so-called one-touch operation.

On the other hand, there are products that are easy to install and remove, simply by placing them on top of an office machine, but these are extremely unstable and may come off or shift position due to a slight external force. This is not desirable as there is a possibility that the

Furthermore, when placed on the top surface of an office machine, if there are four or more contact points with the office machine, there is a risk of wobbling, so it was also desired to obtain a stable mounting condition.

[Purpose of the invention]

The present invention (first invention, second invention) has been made based on such circumstances, and its purpose is to easily insert manual sheet feeding in the middle of automatic sheet feeding. To provide an automatic paper feeder which can be easily attached to and detached from an office machine without fear of erroneous insertion, and which can be installed in a stable and reliable state.

[Summary of the invention]

In order to achieve the above object, the first invention performs a predetermined process on the paper introduced from the paper passage port of the outer casing,
An automatic paper feeder installed in an office machine that discharges processed paper from the paper passage port includes a paper holder that holds multiple sheets of paper in a stack and feeds them out one by one, and a leading end that is introduced into the paper passage port. The paper sent out from the paper holder is guided by one surface that becomes the first supply guide surface and guided into the office machine from the paper passage port, and the processed paper is guided by the first paper discharge guide surface. An internally fixed guide that guides and ejects paper on the other surface thereof and a first paper ejecting guide surface that is provided opposite to the first paper ejecting guide surface of this internally fixed guide are communicated with the paper passing port. An external fixed guide is provided as a paper path, an inner surface is rotatably provided as a second paper ejection guide surface, and an outer surface is used as a second supply guide surface, and these surfaces can be selectively used as the first paper ejection guide surface. When the second supply guide surface is positioned so as to be continuous with the guide surface, and the second paper supply guide surface is made continuous with the first paper discharge guide surface, paper can be inserted from the paper path, and the second paper discharge guide surface is positioned so as to be continuous with the first paper discharge guide surface. a movable guide that closes the outer opening of the paper path when connected to the paper guide surface; a switching operation member for rotating the movable guide; The main body frame is tilted with respect to one of a plurality of mounting shafts provided in parallel to a stocker section that sequentially receives and holds ejected processed paper in a stack and to an office machine or a mounting base attached to the office machine. the first fitting recess formed in the main body frame and at least one of the remaining mounting shafts by rotating the main body frame about the one mounting shaft. As shown in FIG. It consists of

Further, in the second invention, the main body frame is attached to the office machine through a mounting base, and the mounting base has a plurality of parallel mounting shafts between the left and right side plates, so that both side plates have a degree of freedom in the torsional direction. It is configured by being connected so that it has.

[Embodiments of the invention]

FIG. 4 and subsequent figures show embodiments common to the first invention and the second invention.

The automatic paper feeding device 31 is used for automatic paper feeding by being attached to printing devices such as printers and typewriters, as well as copying machines and other office machines.
Here, an example will be shown where it is attached to the printer 32 and used.

Figure 4 shows the automatic paper feeder 3 on the top surface of the printer 32.
1 is installed, and automatic paper feeder 3 is installed.
The main body frame 33 of No. 1 is attached to the printer 32 via a mounting base 34. The mount 34 is detachably attached to the top surface of the printer 32, and the main body frame 33 is detachably attached to the mount 34.

5 and 7 are vertical sectional views showing the automatic paper feeding device 31 in relation to the upper part of the printer 32, with FIG. 5 showing the automatic paper feeding state and FIG. 7 showing the manual paper feeding state.

5 and 7, 35 is a cylindrical platen provided in the printer 32, 36 is an arc-shaped paper pan disposed to cover the lower half of the outer circumference of the platen 35, 37a, 37b is a pinch roller that penetrates the paper pan 36 and comes into pressure contact with the outer peripheral surface of the platen 35, and 38 is a bail roller that comes into pressure contact with or separates from the upper part of the outer peripheral surface of the platen 35. A paper passage port 40 is provided in the outer casing 39 of the printer 32.
A rear edge portion thereof is bent inward to form a paper feeding guide portion 41. Further, the front edge of the paper passage port 40 forms a part of the transparent cover 42 and is bent outward to form an external fixed guide 43. Furthermore, platen 35
A guide member 44 having a V-shaped cross section is disposed adjacent to the outer circumferential surface of the paper passage port 40 .

On the other hand, the configuration of the automatic paper feeder 31 is as follows. In the figure, reference numeral 45 denotes a paper holder, which includes a paper holder 47 that holds a plurality of sheets of paper 46a in a stack, a compression coil spring 48 that elastically pushes up this holder 47 from the bottom, and a compression coil spring 48 that resists this spring 48. A stopper member 49 that brings the corners of the uppermost sheet 46a into contact and aligns the sheets, and a stopper member 49 that aligns the uppermost sheet 46a with one
This configuration includes a feed roller 50 that feeds out sheets one by one.

Reference numeral 51 in the figure denotes an internally fixed guide, which is arranged with its lower end introduced obliquely into the paper passage port 40, and which guides the paper 46a sent out from the paper holder 47 on the lower surface (first supply Guide surface 51
a) to guide the paper into the printer 39 through the paper passage port 40. The external fixed guide 43 faces the upper surface (first paper discharge guide surface 51b) of this internal fixed guide 51, and the space between the external fixed guide 43 and the first paper discharge guide surface 51b is as follows.
A paper passage 52 communicates with the paper passage port 40 .

The upper half of the internal fixed guide 51 is covered by a movable guide 53. This movable guide 53
is rotatably supported at its upper end near the upper end of the internal fixed guide 51, and its lower end is connected to the paper path 5.
2, the lower surface is the second paper ejection guide surface 53a, and the upper surface is the second paper feed guide surface 53a.
53b, and is biased to rotate in a direction approaching the internal fixed guide 51 by a tension spring 54. Further, a switching operation member 55 is rotatably attached to one side edge of the movable guide 53. This switching operation member 55 is a small L-shaped piece as shown in FIG. 6, and is rotatable around a shaft 56 fixed to one side edge of the movable guide 53.
and the back surface of the movable guide 53 are regulated within a range of approximately 90°. Then, as shown in FIG. 5, the switching operation member 5
5 to be substantially orthogonal to the movable guide 53, the second paper discharge guide surface 53a becomes the first paper discharge guide surface 51b.
and the paper path 52
The upper end opening of the container is closed. Further, when the switching operation member 55 is brought into a state parallel to the movable guide 53 as shown in FIG. It comes to be continuous with the surface 51b. A stocker section 58 is provided above the movable guide plate 53. This stocker section 58 includes the first,
A pair of paper ejection rollers 59a, 59b that sandwich the printed paper 46b ejected along the second paper ejection guide surfaces 51b, 53b, and these rollers 59.
This configuration includes a stocker 60 that receives and stacks and holds the printed sheets 46b that have passed through the paper sheets 46a and 59b.

In addition, 61a and 61b in the figure are the mounting bases 34.
These are mounting shafts provided in parallel to each other and are for mounting the main body frame 33 on the mounting base 34.

As shown in FIG. 8, the mounting base 34 connects the left and right side plates 62, 62 by the mounting shafts 61a, 61b and a square shaft 61c disposed between them. 61a, 61b, 61
c and the side plates 62, 62, as shown in FIG.
2 and 62 are designed to have a degree of freedom in the torsional direction. In addition, 64 in FIG. 8 is a cover that covers the side plate 62, and 65 in FIG. 9 is a cover for each shaft 61a,
This is a stop ring that prevents the holes 61b and 61c from being pulled out from the holes 63a, 63b, and 63c. Moreover, the reason why the square shaft 61c is provided in the middle is not only for connecting the side plates 62, 62, but also when a pin feed tractor or the like is installed in the mounting base 34, by rotating this square shaft 61c. This is because it can also be used to drive the rotating wheels of a tractor.

Furthermore, rubber legs 66 for placing on the top surface of the printer 32 are attached to the rear part of the side plate 62 of the mounting base 34, as shown in FIG.
Attachment legs 67 are provided in the front portion and extend downward. The printer 32 is attached to the lower end of the mounting leg 67.
A recess 6 that fits into the inner platen shaft 35a from above.
8 and an engaging protrusion 69 provided inside the printer 32
A recess 0 is provided in which the recess 0 is fitted from above. Note that an existing shaft (any shaft may be used) within the printer 32 can be used as the engaging convex portion 69.
Further, a hook member 71 is rotatably attached to the mounting leg portion 67 and engages with the engaging protrusion portion 69 from below. This hook member 71 is attached to the side plate 62.
A release operation member 72 attached to the front part so that it can be raised and lowered
A tension spring 73 is stretched between the operating member 72 and the side plate 62 to bias the operating member 72 upward, and the hook member 71 is connected to the engaging protrusion 69. is held in the engaged position. Therefore, the hook member 71 is always
The mounting base 34 is firmly attached to the printer 32 by engagement with the engagement protrusion 69, but by pushing down the release operation member 72 against the spring 73, the hook member 71 is engaged. It comes off from the convex portion 69, and the mounting base 34 can be removed from the printer 32. In addition, the left and right side plates 62, 6 of the mounting base 34
2 has a degree of freedom in the torsional direction, so that the left and right rubber legs 66 and the recesses 68 and 70 are stably attached to the printer 32 without floating up.

On the other hand, the mounting structure of the automatic paper feeder 31 to the mounting base 34 is as follows. As shown in FIG. 10, first and second fitting recesses 74 and 75 are formed at the lower ends of the left and right side plates of the main body frame 33 to fit into the mounting shafts 61a and 61b from above. The first fitting recess 74 is provided at an angle so as to open obliquely toward the rear.
Only when the main body frame 33 is tilted backward as shown in FIG. 1 can it be fitted onto or removed from the mounting shaft 61a. Further, the second fitting recess 75
The first part in which the fitting recess 74 is fitted to the mounting shaft 61a
In the state shown in Figure 1, by rotating the main body frame 33 forward about this mounting shaft 61a, it will fit into the mounting shaft 61b, and by rotating it backwards, it will be pulled out from the mounting shaft 61b. be able to. Note that 76 in the figure is a recess formed in the left side plate of the main body frame 33 for allowing the square shaft 61c to escape.

Further, a locking mechanism 77 is provided on the left and right side plates of the main body frame 33. This is comprised of a locking lever 78 that is rotatably provided and a tension spring 79 that biases the lever 78 to rotate rearward. 12a to 12c show the locking mechanism 7 and the second
This shows the relationship between the fitting recess 75 and the mounting shaft 61b. In the state shown in FIG. is brought into contact with a stopper 80 provided at an appropriate position on the main body frame 33 by the elasticity of a spring 79, and a part of the hook portion 78b formed at the lower end of the locking lever 78 is made to wrap into the second fitting recess 75. There is. Therefore, when the main body frame 33 is rotated forward about the attachment shaft 61a, the curved end of the hook portion 78b will eventually come into sliding contact with the attachment shaft 61b, and the hook portion 78b will be attached to the second fitting recess 75. A certain elastic resistance is added to the fitting with the shaft 61b. When the front end of the main body frame 33 is pushed down, the locking lever 78 rotates slightly clockwise in the figure against the spring 79, and the second fitting recess 75 is attached as shown in b and c in the figure. Fits into the shaft 61b. On the other hand, when removing the main body frame 33 from the mounting base 34, first tilt the main body frame 33 backward to disengage the second fitting recess 75 from the mounting shaft 61b, and then move it upward in that tilted position. Then, the first fitting recess 74 is removed from the mounting shaft 61a. When the second fitting recess 75 is removed from the mounting shaft 61b, the hook portion 78b of the locking lever 78 is strongly pressed against the shaft 61b by the elasticity of the spring 79, and the second fitting recess 75 and the mounting shaft 61b are separated. A certain amount of elastic resistance is added to the

Next, the operation will be explained. First, in order to automatically feed paper to the printer 32, the switching operation member 55 is set up as shown in FIG. In this case, the tip of the movable guide 53 rises from the internal fixed guide 51, and the second paper discharge guide surface 53a of the movable guide 53 comes to be continuous with the first paper discharge guide surface 51b. Further, the paper passage 52 is connected to the paper passage 5 at the tip of the movable guide plate 53.
The outer opening of No. 2 is closed. The paper holder 47 holds a predetermined number of sheets 46a in a stack, and a spring 48 feeds the uppermost sheet 46 to the roller 5.
0 and rotates the feed roller 50 in the direction of the arrow in the figure, the uppermost sheet 46a is sent out from the sheet holder 47. After passing through the paper path 40, the paper is introduced between the paper pan 36 and the guide member 44, and then between the platen 35 and the pinch roller 37a. After that, this platen 35 is rotated by itself.
A printing head (not shown) performs predetermined printing. Then, the printed paper 46b passes between the platen 35 and the bail roller 38 (however, at this time, the bail roller 38 quickly moves away from the platen 35 to facilitate the passage of the paper 46b), and passes between the external fixed guide 43 and the internal fixed guide. 51 and is guided to a paper path 52 formed between the two paper sheets. Further, the internal fixed guide 51 moves upward along a second paper ejection guide surface 53a that is continuous with the first paper ejection guide surface 51b, and a pair of paper ejection rollers 59a, 59b
It is held in the stocker 60 by these rotations. Next, while automatic paper feeding is being performed in the state shown in FIG.
When it becomes necessary to print on the paper feed guide surface 53b of the movable guide plate 53, rotate the switching operation member 55 made of a small piece to the state shown in FIG.
Then, the cut sheet 62a may be inserted into the paper path 52 from above along the first paper discharge guide surface 51b. Then, the cut sheet 62a is transferred to the paper path 52.
After passing through the paper pan 36 and the guide member 4
4, and further between the platen 35 and the pinch roller 37a. Thereafter, the paper is wound around the platen 35 by rotation of the platen 35 itself, and predetermined printing is performed by the printing head. Then, the printed cut sheet 62b passes between the platen 35 and the bail roller 38, and is guided to the paper path 52. Furthermore, since it rises along the second paper discharge guide surface 53b that is continuous with the first paper discharge guide surface 51b of the internal fixed guide 51, the printed paper 62b can be easily taken out.

Therefore, with the above configuration, if manual cut sheet feeding is to be interrupted during automatic sheet feeding, cut sheet feeding is ready by simply rotating the switching operation member 55 by approximately 90 degrees. The paper 62a can be easily inserted without the need to move the large components. Moreover, in the case of single sheet feeding, the movable guide 53
Cut paper 62 along the second paper feeding guide surface 53b of
It is only necessary to insert a, and this operation can be easily performed without any clutter, and there is no risk of erroneous operation (erroneous insertion).

Furthermore, during automatic paper feeding, the outer opening of the paper path 52 is closed by the movable guide 53, so manual insertion of the cut sheet 62a is prohibited, preventing erroneous operation, and blocking of the paper path 52. A soundproofing effect can also be obtained. Moreover, since the second paper ejection guide surface 53a of the movable guide 53 guides the printed paper 46b rising up the paper path 52 and stably guides it between the pair of paper ejection rollers 59a and 59b, a special This makes it possible to eliminate the need for a guide member and reduce the number of parts.

Further, since the mounting base 34 is securely attached to the printer 32 by the hook member 71 and is lightweight, it can be easily removed from the printer 32 by pressing down the release operation member 72. In addition, the mounting base 34 is constructed by connecting the left and right side plates 62, 62 by parallel mounting shafts 61a, 61b and square shaft 61c so that the two sides have degrees of freedom in four torsional directions. It can be attached to the printer 32 in a stable state at all times.

Furthermore, unless the automatic paper feeder 31 disengages the second fitting recess 75 at the front from the mounting shaft 61b and tilts the main body frame 33 backward, the first fitting recess 74 at the rear disengages from the mounting shaft 61a. Moreover, since a certain elastic resistance is applied by the locking mechanism 77 to the separation of the second fitting recess 75 and the mounting shaft 61b, unless the second fitting recess 75 and the mounting shaft 61b are separated intentionally, There is no risk of it accidentally coming off due to some external force, and a secure installation can be achieved. Further, the disengagement operation does not involve any special unlocking operation or screw removal operation, and is extremely easy to perform as long as you follow the procedure of lifting the front part and then lifting the entire body frame 33 while tilting it backwards. be able to.

On the other hand, when attaching the main body frame 33 to the mounting base 34, first fit the first fitting recess 74 to the mounting shaft 61a with the main body frame 33 tilted backward, and then frame the main body frame 33 about the mounting shaft 61a. 34 to the front, the second fitting recess 75 is fitted to the mounting shaft 61b, and the mounting is completed. Therefore, by fitting the first fitting recess 74 to the mounting shaft 61a, the second fitting recess 75 and the mounting shaft 61b are positioned, so that positioning with respect to the mounting base 34 when attaching the main body frame is easy. It's easy.

Note that the present invention is not limited to the above-described embodiments, but can also be applied to, for example, an apparatus for feeding paper to a copying machine or other office machines.

〔Effect of the invention〕

As detailed above, according to the first invention, manual sheet feeding can be interrupted during automatic sheet feeding, there is no fear of incorrect insertion, and a soundproofing effect can be achieved during automatic sheet feeding. In addition, it is possible to eliminate the need for a dedicated guide member and reduce the number of components.

In addition, the main body frame can be easily positioned when it is attached to an office machine, and even if a certain amount of external force is applied after installation, there is no risk of it coming off, and a reliable attachment state can be obtained.

According to the second invention, in addition to the effects of the first invention, the mounting base can be stably attached to the office machine, and the automatic paper feeder can also be attached stably, which provides excellent effects. Obtainable.

[Brief explanation of the drawing]

Figures 1 and 2 are schematic side views showing a conventional example, Figure 3 is a schematic side view showing another conventional example, and Figures 4 to 12 are schematic side views showing a conventional example. Fig. 4 is a perspective view showing a state in which an automatic paper feeder is attached to a printer, Fig. 5 is a schematic sectional view showing an automatic paper feed state of the automatic paper feeder, and Fig. 6 is a diagram showing one embodiment. A perspective view showing how the switching operation member is attached to the movable guide, FIG. 7 is a schematic sectional view showing the manual sheet feeding state, FIG. 8 is a perspective view of the mounting base, and FIG. 9 is a part of the mounting base. FIG. 10 is an exploded perspective view of the printer; FIG. 10 is a schematic side view showing how the mounting base and automatic paper feeder are attached to the printer;
The figure is a schematic side view showing the procedure for installing the automatic paper feeder to the mounting base, Figure 12a is a side view showing the relationship between the locking mechanism and the second fitting recess, and Figure 12b is the locking mechanism and the mounting shaft. FIG. 3C is a side view showing the relationship between the locking mechanism and the mounting shaft, and FIG. 31...Automatic paper feeder, 32...Printer (office machine), 33...Main frame, 34...Mounting stand, 40
...paper passage port, 43...external fixed guide, 45...
Paper holding section, 46a, 62a...paper, 46b, 6
2b...processed paper, 51...internal fixed guide, 5
1a...First supply guide surface, 51b...First paper discharge guide surface, 52...Paper path, 53...Movable guide, 53
a...Second paper discharge guide surface, 53b...Second supply guide surface, 55...Switching operation member, 58...Stocker section, 6
1a, 61b... Attachment shaft, 62... Side plate, 74... First fitting recess, 75... Second fitting recess, 77... Locking mechanism.

Claims (1)

[Scope of Claims] 1. A main body frame 33 is installed in the office machine 32 that performs predetermined processing on the paper introduced through the paper passage port 40 of the outer casing and discharges the processed paper from the paper passage port.
The automatic paper feeder 31 to which a paper feeder 31 is removably attached includes a paper holder 45 that holds a plurality of sheets of paper in a stack and feeds them out one by one, and a paper holder 45 that is arranged with its leading end introduced into the paper passage opening and that is inserted from the paper holder 45 into the paper passage opening. The fed paper is guided by one surface which becomes the first supply guide surface 51a and guided into the office machine through the paper passage port, and the processed paper is guided by the other surface which becomes the first paper discharge guide surface 51b. and an external paper path 52 that communicates with the paper passage port between an internal fixed guide 51 for discharging the paper and a first paper discharging guide surface provided opposite to the first paper discharging guide surface of the internal fixed guide. The fixed guide 43 is rotatably provided with an inner surface as a second paper ejection guide surface 53a and an outer surface as a second supply guide surface 53b, and these surfaces can be alternatively used as the first paper ejection guide surface. When the second supply guide surface is continuous with the first paper ejection guide surface, it is possible to insert paper from the paper path, and the second paper ejection guide surface is positioned so as to be continuous with the first paper ejection guide surface. a movable guide 53 that closes the outer opening of the paper path when connected to the surface;
a switching operation member 55 for rotating this movable guide; a stocker section 58 that sequentially receives and holds processed sheets discharged along the first and second paper discharge guide surfaces in a stack; A plurality of mounting shafts 61a, 61b,
A first fitting recess 74 is formed in the main body frame so that it can be attached and detached only when the main frame is tilted with respect to one of the main body frames, and the main body frame is rotated around the one mounting shaft. A second fitting recess 75 is formed in the main body frame so as to fit into at least one of the remaining mounting shafts; An automatic paper feeder comprising: an elastic locking mechanism 77 that applies a certain elastic resistance; 2. A main body frame 33 is attached to the office machine 32 that performs predetermined processing on the paper introduced through the paper passage port 40 of the outer casing and discharges the processed paper from the paper passage port.
The automatic paper feeder 31 is removably attached, and includes a paper holder 45 that holds a plurality of sheets of paper in a stack and feeds them out one by one; The fed paper is guided on one surface that becomes the first supply guide surface 51a and guided into the office machine through the paper passage port, and the processed paper is guided on the other surface that becomes the first paper discharge guide surface 51b. Internal fixed guide 51 for ejecting
and an external fixed guide 43 that is provided opposite to the first paper ejection guide surface of the internal fixed guide and defines a paper path 52 that communicates with the first paper ejection guide surface to the paper passage port, and an inner surface. is rotatably provided as a second paper discharge guide surface 53a and an outer surface as a second supply guide surface 53b, and these surfaces are alternatively positioned so as to be continuous with the first paper discharge guide surface, When the second supply guide surface is continuous with the first paper ejection guide surface, paper can be inserted from the paper path, and when the second paper ejection guide surface is made continuous with the first paper ejection guide surface, the paper can be inserted into the paper path. A movable guide 53 that closes the outer opening of the paper path
a switching operation member 55 for rotating this movable guide; a stocker section 58 that sequentially receives and holds processed sheets discharged along the first and second paper discharge guide surfaces in a stack; A plurality of parallel mounting shafts 61 are connected between the side plates 62.
A, 61b, 61c connect the side plates so that they have a degree of freedom in the torsional direction, and the mounting base 34 is mounted on the top surface of the office machine; A first fitting recess 74 formed in the main body frame so that it can be attached and detached only when the main body frame is tilted relative to one.
and a second fitting recess 75 formed in the main body frame so as to fit into at least one of the remaining mounting shafts by rotating the main body frame around the one mounting shaft; 2. An automatic paper feeder comprising: an elastic locking mechanism 77 that applies a certain elastic resistance to fitting and disengaging between the fitting recess and the mounting shaft.