JP3373656B2 - Paper storage device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a discharged paper storage device of an image forming apparatus such as a copying machine or a printing machine, and more specifically, a recording paper to be discharged and a member on a discharge tray. The present invention relates to a discharged paper storage device capable of preventing the collision sound and the vibration sound from colliding with each other and the occurrence of misalignment of recording paper.

[0002]

2. Description of the Related Art In an image forming apparatus such as a copying machine or an office printing machine, a mechanism for automatically discharging recording paper as copying paper or printing cut paper to a paper discharge storage device having a paper discharge tray. There are many types provided with, and there are various types of discharged sheet storage devices. For example, a configuration in which a paper discharge front end press plate that stands upright on a paper discharge tray as a paper discharge storage member and collides with the front end of the recording paper and a pair of side press plates that contact both side edges of the recording paper are arranged. There is something that is taken. In this type of discharged sheet storage device, one sheet discharge leading end pressing plate and a pair of side pressing plates stand on a sheet discharging tray that is swingably supported with respect to the main body of a printing apparatus as an image forming apparatus. It is set up. An absorbent material that is a combination of a sponge and a resin film that collide with the recording paper that is continuously discharged from the discharge portion of the printing device in the direction perpendicular to the paper surface is attached to the tip pressing plate in two examples. Depending on the material, the speed of the discharged recording paper is reduced and the recording paper is dropped and stacked on the discharge tray. The paper discharge front end pressing plate is slidable in the recording paper discharge direction and is movable according to the length of the recording paper in this direction. The side pressing plate is slidable in a direction orthogonal to the recording paper discharge direction, and is movable according to the size of the recording paper in this direction. Further, the tip pressing plate and the side pressing plate are respectively supported by the paper discharge tray so that they can be tilted up and down so that they can be stored. When using the printing device, the paper ejection storage device is used by sliding the paper according to the size of the recording paper with the leading edge pressing plate and the side pressing plate standing up. The holding plate and the holding plate are respectively folded down so that the paper discharge tray is swung toward the main body cabinet to be stored. Further, in Japanese Utility Model Laid-Open No. 63-100456, a paper discharge front end pressing member provided at the front end of a paper discharge tray is composed of a fixed plate and a movable plate made of a magnetic material, and magnets provided above and below the fixed plate. There is described a paper discharge tray configured to change the angle of the movable plate to two positions.

[0003]

In the discharged paper accommodating apparatus having such a structure, when the discharged recording paper collides with the absorbent material, its speed is reduced to absorb the impact energy and reduce the collision noise. However, there is a problem that the collision noise and the vibration noise of the recording paper and the absorber due to the collision cannot be sufficiently absorbed and buffered, and the collision noise and the vibration noise are generated. If only the collision noise and the vibration noise are simply reduced, the effect is exhibited by thickening the entire absorbent material or by removing the resin film from the absorbent material and using only the sponge.
If the absorbent material is made thicker, the absorption power will be increased and the collision noise and vibration noise will be reduced, but on the other hand, the repulsion power will also be increased, and the recording paper that collides with the absorbent material will bounce off to the printing device side, which is the discharge side of the recording paper. Paper misalignment will occur. Also,
If you use only a sponge as the absorbent material, the sponge surface is uneven and has a rough surface, so the coefficient of friction is larger than that of the resin film, and the tip of the recording paper that is collided and dropped on the discharge tray is caught on the sponge. Then, the sheets are bent and stacked, which causes a new problem that a sheet misalignment occurs.

Further, in the paper discharge tray described in Japanese Utility Model Laid-Open No. 63-100456, the angle of the movable plate changes, and this change in angle is reflected in the lower magnet when the paper discharge tray is used. Since the lower end of the movable plate is attracted and the plate is inclined toward the discharge side of the recording paper, it is possible to collide the recording paper with the movable plate and reduce the discharge speed, and align it on the discharge tray. The recording sheets can be stacked, but the problem of the collision noise between the recording sheets and the movable plate still remains. As described above, it is difficult for the conventional discharged sheet storage device to simultaneously solve the problems of noises such as collision noise and vibration noise and the problem of misalignment of the discharged recording papers. DISCLOSURE OF THE INVENTION The present invention provides a discharged paper storage that can reduce the collision noise between the recording paper and the absorbing material and the vibration noise of the recording paper and the absorbing material due to the collision, and reliably stack the entire recording paper to be stacked in an aligned state. The purpose is to provide a device.

[0005]

According to another aspect of the present invention, there is provided a discharge tray including a discharge tray for receiving recording paper discharged from an image forming apparatus, wherein the recording paper is discharged onto the discharge tray. In the direction of discharge, and on the discharge tray near the discharge front pressing plate, on the discharge side of the recording paper from the discharge pressing plate, and on the discharge side of the recording paper. A thin plate elastic member that is provided so as to be inclined toward and is bent and positioned in the discharge range of the recording paper by its own weight. According to another aspect of the present invention, there is provided a paper ejection storage device including a paper ejection tray for receiving recording paper ejected from the image forming apparatus according to the second aspect of the present invention. It is extended toward the upper end side,
A second member flexibly positioned by its own weight in the discharge range of the recording paper
The thin plate elastic member is provided. According to a third aspect of the present invention, there is provided a paper discharge storage device including a paper discharge tray for receiving recording paper discharged from the image forming apparatus, wherein a space member is provided between the thin plate elastic member and the paper discharge front end pressing plate. And a space was formed between the above-mentioned paper discharge front end pressing plate. In a discharged paper storage device including a paper discharge tray for receiving recording paper discharged from the image forming apparatus according to claim 4, a flexible member protruding toward a recording paper discharge side is provided at an upper end portion of the paper discharge front end pressing plate. Was set up. According to another aspect of the present invention, there is provided a paper ejection storage device including a paper ejection tray for receiving recording paper ejected from the image forming apparatus, wherein a movable fixing member is provided on the paper ejection end pressing plate, and the movable fixing member is a thin plate elastic member. Supported. According to another aspect of the present invention, there is provided a paper ejection storage device including a paper ejection tray for receiving recording paper ejected from the image forming apparatus, wherein the thin elastic member is provided with a thin damping material .

[0006]

According to the first aspect of the present invention, recording is performed on the paper discharge tray near the paper discharge front end pressing plate provided in the paper discharge tray in the discharge direction of the recording paper and from the paper discharge front end pressing plate. Since the thin sheet elastic member is provided on the paper discharge side so as to be inclined toward the discharge side of the recording paper and is bent and positioned in the discharge range of the recording paper by its own weight, the recording paper is discharged from the apparatus main body. Then, the thin plate elastic member collides with the inclined thin plate elastic member, and the thin plate elastic member bends in the ejection direction of the recording paper, and kinetic energy (moving force) in the ejection direction of the recording paper is absorbed. According to the second aspect of the present invention, the thin plate elastic member is extended downward toward the upper end side of the thin plate elastic member below the collision portion with the recording paper, and is bent in its discharge range of the recording paper by its own weight. Since the second thin plate elastic member is provided, both the second thin plate elastic member and the thin plate elastic member are bent when the recording paper is ejected, and the kinetic energy (moving force) in the ejection direction of the recording paper is absorbed. It Even when the discharged recording sheets are stacked on the discharge tray and the thin plate elastic member is pushed toward the discharge tip pressing plate side and comes into contact with the discharged sheet, the second thin plate elastic member bends, so that the recording sheet is discharged. Kinetic energy (moving force) in the direction is absorbed even when recording sheets are stacked. According to the third aspect of the present invention, the space member is provided between the thin elastic member and the sheet discharge leading edge pressing plate, and the gap is formed between the thin plate elastic member and the sheet discharging leading edge pressing plate. Even if the recording paper discharged onto the tray is stacked and the thin plate elastic member is pushed toward the paper discharge tip pressing plate side, a distance is maintained between the thin plate elastic member and the paper discharge front pressing plate, and the recording paper is thin. Even if the thin plate elastic member collides with the elastic member, the thin plate elastic member can bend in the discharging direction. According to the invention described in claim 4, since the flexible member projecting toward the discharge side of the recording paper is provided at the upper end portion of the paper discharge front end pressing plate, the thin elastic member is formed by the recording paper stacked on the paper discharge tray. Even if is pushed to the side of the paper ejecting edge pressing plate, the upper end of the paper ejecting edge pressing plate and the upper end of the thin elastic member are not in contact with each other, and a new recording paper is loaded on the paper ejection tray on which the recording paper is loaded. Even if the thin plate elastic member is discharged and collides with the thin plate elastic member, the thin plate elastic member can be deformed. According to the fifth aspect of the present invention, since the movable fixing member is provided on the sheet discharge front pressing plate and the thin plate elastic member is supported by the movable fixing member, the thin plate elastic member can be displaced with respect to the sheet discharging front pressing plate. Becomes According to the invention of claim 6,
Since the thin elastic member is provided with the thin damping material, the vibration of the thin elastic member itself which occurs when the thin elastic member collides with the discharged recording paper is absorbed by the damping material .

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. First, the configuration and operation of a stencil printing apparatus of the plate making and printing type as an image forming apparatus to which the discharged sheet storage apparatus of the present invention is applied will be described. The stencil printing machine indicated by reference numeral 1 in FIG. 1 includes a main body cabinet 50, a paper feeding / discharging unit 60, and a stencil discharging unit 7.
0, a reading unit 80, a plate making / plate supplying unit 90, and a drum unit (image forming unit) 100. The stencil printing machine 1 includes a document tray 80a provided on the upper part of the main body cabinet 50.
When the manuscript 63 is set on and the plate-making start key (not shown) is turned on, the printing drum (plate cylinder) 1 of the drum unit 100 is
01 rotates in the direction opposite to the direction of the arrow in the figure, and the used master 61 ′ mounted on the outer peripheral surface of the printing drum 101.
The peeling rollers 71a, 71b, the belts 72a, 72b, and the rollers 73 of the plate discharge unit 70 arranged in the rotation direction.
In the plate discharging / peeling / conveying unit constituted by a and 73b, the used master 61 ′ is arranged above the paper discharging box 74 and is vertically movable by separating from the drum and delivering and discharging into the plate discharging box 74. The plate 75 performs compression processing inside the plate discharge box 74.

In the reading section 80, the separation roller 81, the pair of front original conveying rollers 82a and 82b, and the pair of rear original conveying rollers 83a and 83b are rotationally driven by a driving means (not shown) to set the original 63 set on the original receiving tray 80a. Are transported on the contact glass 85 for exposure reading. The exposure reading is performed by the pair of front original conveying rollers 82a,
82b and the rear original conveying roller pair 83a, 83b, while the original 63 is being conveyed on the contact glass 85, the surface of the original 63 exposed by the fluorescent lamp 86 provided below the contact glass 85 is exposed. The reflected light is transmitted through the mirror 87 and the lens 88 to the image sensor 8 such as a CCD.
It is incident on the image sensor 9 and is photoelectrically converted by the image sensor 89 to be inputted as an electric signal to an A / D conversion substrate (not shown) provided in the main body cabinet 50.

On the other hand, in the plate making / plate feeding section 90, a pair of feed rollers 93a and 93b driven by a driving motor (not shown) and the platen roller 9 are provided in parallel with the image reading operation.
2, the unperforated master 61 wound into a roll is unwound from the roll state and conveyed. Master 61
Has a laminated structure in which a thermoplastic resin film and a porous support member that supports the film are bonded together, and is sandwiched between a platen roller 92 and a thermal head 91 arranged opposite to the roller. And the A / D
With a plurality of heating elements arranged in a line on the thermal head 91, which are selectively heated according to the digital image signal sent after being subjected to various kinds of processing by the conversion board and other plate-making control board (not shown). Melt perforation and plate making.

After the completion of the plate discharging operation of the used master 61 ', the leading end of the plate-making master 61 is conveyed to the drum part 100 side through the plate feeding roller pair 94a, 94b.
A master clamper 1 provided on a part of the outer peripheral surface of a print drum 101 that is rotationally driven by a drive motor (not shown).
It is sent to 02. The master clamper 102 clamps the leading end of the master 61 at a fixed timing and is openable / closable with respect to the outer peripheral surface of the printing drum 101. When the clamper 102 is closed and the tip of the master 61 is clamped, the print drum 101 is rotationally driven in the direction of the arrow so that the master 61 is gradually wound around the outer peripheral surface of the drum 101. Feed roller pair 93
A cutter 95 is arranged between a and 93b and the platen roller 92. The master 61, which has completed plate making,
The cutter 95 cuts it into a certain length to form a single master 61, which is completely wound around the outer peripheral surface of the printing drum 101. With this operation, the plate supply is completed.

The paper feeding / discharging unit 60 feeds the recording paper 62 stacked on the paper feed tray 51 arranged to the right of the print drum 101 toward the print drum 101, and also feeds the paper feed tray 51.
The printed recording paper 62 is discharged to the discharged paper storage device 10 arranged on the left side of the printing drum 101 which is the opposite side. The paper feeding / discharging unit 60 includes a paper feeding roller 110 and a pair of separation rollers 111a and 111 arranged on the front end 62a side of the recording paper 62.
b, the uppermost one of the stacked recording papers 62 is delivered to the feed rollers 112a and 112b. The feed rollers 112 a and 112 b are driven to rotate at a predetermined timing in synchronization with the rotation of the print drum 101, and the recording paper 62 to be conveyed is arranged so as to face the print drum 101. The press roller 103 and the printing drum 1 which are supported so that they can come into contact with and separate from each other.
It will be delivered between 01 and 01. The press roller 103 is normally placed at a position separated from the print drum 101 indicated by a chain double-dashed line, and when the recording paper 62 reaches between the print drum 101 and the press roller 103, a solid line position by a drive mechanism (not shown). The recording paper 6 which has been lifted up to the outer peripheral surface of the printing drum 101 and is urged against the outer peripheral surface of the printing drum 101 to be conveyed.
2 is a master 61 mounted on the outer peripheral surface of the printing drum 101.
It is designed to be pressed against.

The printing drum 101 is provided with a large number of openings (not shown) for allowing ink to pass through the so-called image area excluding both side edges thereof, the clamper 102 and its peripheral portion. Inside the printing drum 101, the drum 10
The ink roller 104 that contacts the inner peripheral surface of the first roller 104 and rotates, the doctor roller 106 that is arranged at a slight distance from the ink roller 104, and that forms an ink reservoir 105 between the ink roller 104 and the ink roller 104. An ink supply pipe 107 for supplying printing ink is arranged,
An appropriate amount of printing ink is supplied to the inner peripheral surface of the drum. Therefore, when the recording paper 62 is pressed against the master 61 by the press roller 103, the printing ink oozes out from the perforated portion of the master 61 and is transferred onto the recording paper 62, and the ink image corresponding to the perforated image of the master 61 is printed. Is performed.

The recording paper 62 printed in this way is
When passing between the press roller 103 and the print drum 101, the print drum 1 is ejected by the paper discharge peeling claw 113 arranged on the left side of the drum, which is on the downstream side in the rotation direction of the print drum 101.
01, and the suction and discharge inlet roller 114 and the suction and discharge outlet roller 11 which are arranged below the paper discharge peeling claw 113.
On the paper discharge tray 52 which constitutes the paper discharge storage device 10, by the paper discharge conveyance section which is composed of the conveyor belt 116 that is stretched around the conveyor belt 5 and the suction fan 117 that is arranged below the conveyor belt 116. Is discharged. This first printing corresponds to printing, and after finishing printing, set the number of prints with a numeric keypad (not shown) and turn on the print start key (not shown). Is repeated for the set number of prints, and each recording paper 62 is discharged in the direction of arrow a and sequentially stacked on the paper discharge tray 52.

Next, an embodiment of the discharged sheet storage device 10 will be described. (First Embodiment) The discharged paper storage device 10 shown in the first embodiment is
The paper ejection tray 52, the paper ejection leading end pressing plate 11, the pair of side pressing plates 12 and 13, the thin elastic member 14, and the spacer 15 for mounting the thin elastic member 14 on the leading end pressing plate 11.
It has and. The sheet discharge front pressing plate 11 is shown in FIGS.
Is provided upright at one end 52a of the paper discharge tray 52 located in the discharge direction of the recording paper 62 indicated by the arrow a, and by the well-known slide mechanism S1, the discharge direction and the discharge side of the recording paper 62 indicated by the double-headed arrow AB are set. It is slidable, and its position can be moved according to the size of the recording paper 62. The side pressing plates 12 and 13 are respectively erected on both sides 52b and 52c of the paper discharge tray 52, and slide in a direction orthogonal to the discharge direction of the recording paper 62 indicated by a double-headed arrow CD by a well-known slide mechanism S2. It is freely movable and can be moved according to the size of the recording paper 62. The paper output tray 52 has a shaft 53 on the main body cabinet 50.
It is rotatably supported via and can be opened and closed with respect to the main body cabinet 50. Further, the paper discharge front end pressing plate 11 and the side press plates 12 and 13 are swingably supported by the paper discharging tray 52 about the one-dot chain lines X-X and Y-Y, respectively, and in the center of the paper discharging tray 52. Can be tilted to the side.

The thin plate elastic member 14 has a thickness of 0.1 to 0.
It is composed of a polyester film having a thickness of about 35 mm. The thin plate elastic member 14 has its lower end 14a attached to one inclined surface 15A of the spacer 15 as a space member which is formed in a triangular cross section and extends in the width direction of the paper discharge front pressing plate 11. The spacer 15 is a sheet discharge front end pressing plate 11.
Is fixed to the inner surface 11A from the lower end 11a side. That is, the thin elastic member 14 is provided so that the upper end 14 b side is a free end and is inclined toward the main body cabinet 50 side from which the recording paper 62 is discharged, and the thin elastic member 14 bends due to its own weight to be recorded on the paper discharge tray 52. It is located within the emission range of. The inclination of the thin elastic member 14 is shown in FIG.
As shown in (a), the inner surface 11 of the paper discharge front pressing plate 11
The distance L from the upper end 11b to the upper end 14b of A is 5 to 1
It is desirable to bend and set the member so that it is placed within a range of about 00 mm. If this condition can be satisfied without the spacer 15, the thin plate elastic member 14 is directly connected to the lower end 1 of the inner surface 11A of the paper discharge front pressing plate 11.
It may be attached to the 1a side.

According to the paper discharge accommodating apparatus 10 having such a structure, when the recording paper 62 is discharged from the stencil printing machine 1, the recording paper 62 is a thin plate made of a polyester film as shown in FIG. 4 (a). Flexible member 1 of elastic member 14
It collides with the 4b side. Then, the thin plate elastic member 14 is moved to the position shown in FIG.
The kinetic energy of the recording paper 62 is absorbed by bending from the collision position shown by the chain double-dashed line shown in FIG. As a result, almost no collision noise or vibration noise is generated, as compared with the case where the absorber 140 made of a polyester film and sponge collides with the recording paper 62 as shown in FIG. Further, the thin elastic member 14 with which the recording paper 62 collides is
In the initial state, the recording paper 62 is inclined toward the discharge side, and therefore returns to the discharge side when it is bent to some extent, and at the time of this return, the recording paper 62 slides down along the surface of the thin elastic member 14. Furthermore, since the thin elastic member 14 is a polyester film, the friction coefficient is smaller than that of the absorbent material 141 made of sponge shown in FIG. 22 as a conventional example,
The recording paper 62 is, as shown in FIG.
It slides down along the surface of 4. Therefore, unlike the conventional discharged paper storage device shown in FIG. 22, the recording paper 62 is not bent and stacked on the paper discharge tray 52, and the occurrence of paper misalignment can be reduced. On recording paper 6
2 are aligned and loaded.

Here, the discharged sheet storage device 1 having the configuration of this embodiment
FIG. 5 shows the result of the noise test of the paper discharge device No. 0 and the conventional paper discharge storage device. FIG. 5A shows the noise characteristics of the conventional paper ejection storage device shown in FIG. 21, and FIG. 5B shows the paper ejection storage device 1 of this embodiment.
A noise characteristic of 0 is shown. In both figures, the horizontal axis represents time and the vertical axis represents the output voltage of the sound level meter corresponding to the collision noise. The measurement test was performed under the following conditions. Noise meter B & K 2235 type (manufactured by B & K) Paper size B4 size 55 kg Paper stencil printer Preport VT3500 (manufactured by Ricoh Co., Ltd.) As is clear from this test result, the paper discharge storage device 10 of the present embodiment is more conventional. It turns out that it is much lower in noise than the ones.

Here, the reason why the paper discharge front end pressing plate 11 is provided will be described. When the thin sheet elastic member 14 is directly attached to the sheet discharge tray 52 without providing the sheet discharge front pressing plate 11, the thin sheet elastic member 14 is gradually discharged by the recording sheet 62 discharged from the stencil printing apparatus 1. Direction, and finally to a position below the collision portion of the thin plate elastic member 14 with the recording paper 62,
The ejected recording paper 62 is passed outside the paper ejection tray 52. Further, if only the thin plate elastic member 14 is used, the member 14 becomes large in the ejection direction due to the collision with the recording paper 62, and the thin plate elastic member 14 itself vibrates to generate sound, and stencil printing is performed. This is because the sound of the fan or the like of the device 1 cannot be shielded and the sound escapes in the discharge direction, which increases the noise level on the discharge side.

(Second Embodiment) In the second embodiment, as shown in FIG. 6, the thin plate elastic member 14 is formed at a portion located below the collision portion E with the recording paper 62, similarly to the spacer 15. Through the second spacer 16 having a triangular cross section
The thin elastic member 17 is attached.

The second thin plate elastic member 17 is also the thin plate elastic member 1.
The second spacer 1 is made of a polyester film like 4
The lower end 17a is attached to one slanted surface of the sheet No. 6, and the upper end 17b is a free end and is bent and inclined toward the discharge side of the recording paper 62 by its own weight. In the second embodiment configured as described above, when the recording paper 62 is ejected from the stencil printing machine 1, the recording paper 62 collides with the upper end 17b of the second thin plate elastic member 17 and the ejection tray. 52 falls on. At the time of this collision, the second thin plate elastic member 17 and the thin plate elastic member 14 are both in the paper discharge front end pressing plate 11 side, that is, in the recording paper 62 discharge direction, and thus in the paper discharge direction a. It absorbs the kinetic energy of to reduce collision and vibration sounds. Further, in the first embodiment, the recording paper 6
When 2 is stacked on the sheet discharge tray 5 2 somewhat, 7
As shown in FIG.
Since the upper end 14b of the recording paper 62 comes into contact with the inner surface 11A of the recording paper 62 and the kinetic energy of the recording paper 62 cannot be absorbed, the recording paper 62 bounces to the discharge side together with a collision sound, and the discharge tray 52 It is conceivable that misalignment of the recording sheets 62 stacked on the top may occur.
However, as in the present embodiment, by providing the thin elastic member 14 with the second thin elastic member 17 to form a double structure, the recording paper 62 is stacked on the paper discharge tray 52 to some extent and the thin elastic member 14 is stacked. The second thin plate elastic member 17
When the upper end 17b of the recording paper 62 is located on the inner surface 11A side, the recording paper 62
Can absorb the kinetic energy of the
2 bounce can be suppressed.

(Third Embodiment) As shown in FIG. 8, the third embodiment is characterized in that a space L1 is formed between the thin plate elastic member 14 and the inner surface 11A of the paper discharge front end pressing plate 11. . Specifically, the spacer 18 having a quadrangular cross section and extending in the width direction of the paper discharge front pressing plate 11 is provided with the spacer 18.
Provided on the lower end 11a side of the inner surface 11A of the thin plate elastic member 1
4 and the paper discharge front end holding plate 11 and the recording paper 62
The lower end 14a of the thin plate elastic member 14 is attached to one sloping surface 18a of the spacer 18 located on the discharge side, and the upper end 14b of the thin plate elastic member 14 is a free end. The thin elastic member 14 is bent and tilted toward the discharge side of the recording paper 62 by its own weight. In this way, the paper discharge front end pressing plate 11
Lower end 11a of inner surface 11A and lower end 1 of thin plate elastic member 14
Since the spacer 18 is provided between the sheet 4a and the sheet 4a to form the gap L1, the inner surface 11A of the sheet discharge front pressing plate 11 and the thin plate elastic member 14 are separated from each other, so that the recording sheet 62 is discharged from the sheet discharge tray 5
Since the thin plate elastic member 14 does not contact the inner surface 11A as in the case of the first embodiment even when it is stacked on the sheet 2, the upper end 14b of the thin plate elastic member 14 does not contact the inner surface 11A as shown in FIG.
It can be on the A side. Therefore, the kinetic energy of the discharged recording paper 62 can be absorbed, and the collision noise and the vibration noise can be suppressed even if the recording paper 62 is stacked on the paper discharge tray 52 to some extent.

FIG. 10 shows a modified example of the third embodiment, in which the spacer 15 in the first embodiment is used as a paper discharge tray 52 located on the discharge side of the recording paper 62 near the paper discharge front end pressing plate 11. The thin plate elastic member 14 is attached to the spacer 15 while being inclined toward the discharge side of the recording paper 62, and is positioned in the discharge range of the recording paper 62 by its own weight.
This is an example in which a space L1 is formed between the lower end 11a of the inner surface 11A of the paper discharge leading edge pressing plate 11 and the lower end 14a of the thin plate elastic member 14. In this way, even if the spacer 15 is not attached to the paper discharge front pressing plate 11, the thin elastic member 14 is attached to the recording paper 6
The recording sheet 62 is inclined toward the discharge side of the recording sheet 62 and is bent and positioned in the discharge range of the recording sheet 62 due to its own weight. The kinetic energy of 62 can be absorbed. Therefore, collision noise and vibration noise due to the collision between the thin elastic member 14 and the recording paper 62 can be reduced.

FIG. 11 shows a further modification of the third embodiment. The feature of this embodiment is that a space L1 is formed between the base end 11a of the inner surface 11A of the paper discharge front end pressing plate 11 and the lower end 14a of the thin plate elastic member 14, and the thin plate elastic member 14 is used for the recording paper 62. That is, the discharge range is not bent by its own weight. That is, the thin plate elastic member 14 has the lower end 14a on the one surface 18A located on the discharge side of the recording paper 62 in the spacer 18 'having a rectangular cross section attached to the inner surface 11A on the base end 11a side of the discharge front pressing plate 11. It is attached and is erected so as to be substantially parallel to the paper discharge front end pressing plate 11. Thus, even if the thin elastic member 14 is not inclined toward the discharge side of the recording paper 62, the base end 11
Since the space L1 is formed between the a and the lower end 14a, when the recording sheet 62 collides with the thin plate elastic member 14, the thin plate elastic member 14 may bend toward the inner surface 11A of the paper discharge front end pressing plate 11. Yes, the recording paper 62 and the thin plate elastic member 1
It is possible to reduce the generation of collision noise and vibration noise due to the collision with 4. Here, the spacer 18 ′ is provided on the inner surface 11A of the paper discharge tip pressing plate 11, but the present invention is not limited to this. For example, the paper discharge tray located on the discharge side of the recording paper 62 with respect to the inner surface 11A. It may be provided on the spacer 52 and a gap may be formed between the spacer 18 'and the inner surface 11A.

Further, as shown in FIG. 12, one surface 180A
The thin plate elastic member 14 may be attached to the spacer 180 formed so as to be inclined so as to approach the sheet discharge front end pressing plate 11 side. In this case, the base end 11a and the bottom end 14a
The gap L1 is of course provided between the upper end 11b of the sheet discharge front end pressing plate 11 and the upper end 14b of the thin plate elastic member 14 as well as the gap L1. As described above, even if the paper discharge front pressing plate 11 is inclined toward the discharge direction facing the discharge side of the recording paper 62, it is between the inner surface 11A on the upper end 11b side and the upper end 14b of the thin plate elastic member 14. By providing the space L, even if the recording paper 62 collides with the thin plate elastic member 14, the thin plate elastic member 14 can be sufficiently deformed toward the inner surface 11A of the paper discharge tip pressing plate 11, and the recording paper 62 and It is possible to reduce the generation of collision noise and vibration noise due to the collision with the thin plate elastic member 14. In each of the above embodiments, the thin plate elastic member 14 is provided in the vicinity of the paper discharge front end pressing plate 11, but the vicinity is a range in which the intervals L and L1 can be achieved. Therefore, the upper end 14b of the thin elastic member 14 which has collided with the recording paper 62 and is deformed toward the inner surface 11A of the paper discharge front pressing plate 11 comes into contact with the inner surface 11A and the recording paper 6
It may also absorb two kinetic energies.

(Fourth Embodiment) In a fourth embodiment shown in FIG. 13, a sponge material 19 as a flexible member is provided on an inner surface 11A of the paper discharge leading edge pressing plate 11 located on the upper end 11b side, and the upper end 11b and the thin plate are provided. The upper end 14b of the elastic member 14 is not in contact. The sponge material 19 projects toward the discharge side of the recording paper 62, extends in the width direction of the discharge leading end pressing plate 11, and has a single band shape. Here, although the sponge material 19 is in the form of a strip, the discharge leading end pressing plate 11
May be provided at intervals in the width direction, or may be provided in the shape of a disc, a polygon, or a cone. In this way, the upper end 11b of the discharge leading end pressing plate 11 and the thin plate elastic member 1
When the recording paper 62 is loaded on the paper discharge tray 52 by disposing the sponge material 19 between the upper end 14b and the upper end 14b of the sheet 4, the thin elastic member 14 discharges the paper as shown in FIG. The tip pressing plate 11 is gradually inclined toward the inner surface 11A side, and its upper end 14b finally contacts the sponge material 19. When the recording paper 62 discharged in this state collides with the thin plate elastic member 14, as shown in FIG.
Forms an arc shape on the inner surface 11A side around the contact portion with the sponge material 19, and absorbs the kinetic energy of the recording paper 62. Therefore, the collision sound at the time of the collision between the recording paper 62 and the thin elastic member 14 and the accompanying vibration sound are reduced.

(Fifth Embodiment) In the fifth embodiment, as shown in FIG. 15, a hinge 20 as a movable fixing member is provided on the paper discharge front end pressing plate 11, and the thin plate elastic member 1 is attached to the hinge 20.
4 is fixed and can be displaced with respect to the paper discharge front end pressing plate 11. As shown in FIG. 17, the hinge 20 is provided on the side surfaces 11B and 11C of the paper discharge front end pressing plate 11.
Each of them is swingably supported by a pin 21. A spacer 15 is supported and fixed to the hinge 20.
A lower end 14 a of the thin plate elastic member 14 is attached to one inclined surface 15 a of the spacer 15. Thin elastic member 1
4 is bent and inclined toward the discharge side of the recording paper 62 due to its own weight. As described above, since the spacer 15 for holding the thin plate elastic member 14 is swingably supported by the hinge 20, when the paper discharge storage device 10 is not used, the spacer 15 shown in FIG.
It is possible to displace the thin plate elastic member 14 placed at the position of use indicated by the two-dot chain line in FIG. 6 toward the inner surface 11A of the paper discharge front end pressing plate 11. Therefore, the paper discharge tray 52 can be swung even with the thin elastic member 14 attached, and the paper discharge storage device 10 is shown in FIG.
Can be stored at 0. That is, in the above-described first to third embodiments and the modifications thereof, the spacer 15 has the inner surface 1
1A, or the sheet discharge tray 5 in which the thin plate elastic member 14 is on the discharge side because it is fixed to the sheet discharge tray 52.
2 was held in a state of being inclined toward the center side of the sheet 2 and in a state of being parallel to the sheet discharge leading edge pressing plate 11, which hindered storage. Thus, the position of the thin plate elastic member 14 can be moved, and the discharge tray 52 can be stored even when the thin plate elastic member 14 is mounted. Although the thin plate elastic member 14 is attached to the hinge 20 via the spacer 15 in the present embodiment, the present invention is not limited to this, and for example,
As shown in FIG. 18, the hinge 20 is attached to the sheet discharge front end pressing plate 1.
1 is formed in a U shape extending in the width direction, and its rear surface 20
The lower end 14a of the thin plate elastic member 14 may be directly attached to a and provided. In this case, the back surface 20a is formed as an inclined surface, or a stopper pin 22 or the like is provided on the side surface 11B of the paper discharge tip pressing plate 11 to adjust the swing angle of the hinge 20 to eject the thin elastic member 14 from the recording paper 62. It may be tilted to the side and bent by its own weight, or may be parallel to the paper discharge front end pressing plate 11.

(Sixth Embodiment) A sixth embodiment shown in FIGS. 19 and 20.
The embodiment is characterized in that a sponge 23 as a thin damping material is attached to the thin plate elastic member 14. Sponge 2
Reference numeral 3 denotes a strip having a thickness of about 1 to 5 mm and a width of about 10 mm, and is adhered in the longitudinal direction of the discharge leading edge pressing plate 11 to the approximate center of the back surface of the thin elastic member 14 located on the inner surface 11A side. Similar to the above-described embodiments, the thin plate elastic member 14 is bent and inclined toward the discharge side by its own weight. According to such a configuration, in each of the above-described embodiments, when the recording paper 62 collides with the thin plate elastic member 14 and becomes the inner surface 11A side, the thin plate elastic member 14 itself vibrates and generates a vibration sound. By applying the sponge 23 to the thin plate elastic member 14, the vibration is absorbed by the sponge 23. Therefore, the vibration sound of the thin elastic member 14 due to the collision between the thin elastic member 14 and the recording paper 62 can be reduced,
The vibrating noise is reduced as compared with the thin plate elastic member 14 shown in the first to fifth embodiments and the modified examples.
The above-described embodiments are not limited to the configuration, and it is desirable that the embodiments be combined for each model of the stencil printing apparatus 1 so as to match each model, for example, the fourth embodiment. Combining each of the fifth and sixth embodiments, the thin elastic member 14 provided with the sponge 23 is shaken by the hinge 20 on the discharge tip pressing plate 11 having the sponge material 19 provided on the upper end 11b of the inner surface 11A. Since the recording paper 62 is movably supported, the recording paper 62 can be aligned and stacked on the discharge tray 52 while suppressing the collision noise and the vibration noise with the recording paper 62, and the main body cabinet with the thin plate elastic member 14 attached. It is possible to provide a discharged paper storage device that can be stored in 50 (see FIGS. 1 and 3).

[0028]

According to the first aspect of the invention, the kinetic energy of the recording paper discharged from the image forming apparatus is bent and tilted toward the discharge side of the recording paper due to its own weight, and falls within the discharge range of the recording paper. The thin sheet elastic member collides with the thin sheet elastic member and is absorbed by bending, so that there is almost no collision noise due to the collision, and the recording sheets stacked on the sheet ejection tray are arranged in an orderly manner. A storage device can be provided. According to the second aspect of the present invention, even if one thin plate elastic member comes into contact with the paper discharge front end pressing plate due to an increase in the amount of recording paper loaded on the paper discharge tray, the other thin plate elastic member is surely secured. Therefore, the kinetic energy of the discharged recording paper is surely absorbed even when the recording paper is stacked on the paper discharge tray, and the collision noise between the recording paper and the discharge front end pressing plate is reduced. In addition, it is possible to provide a discharged paper storage device that can align the stacked recording papers to the end. According to the third aspect of the present invention, even if the recording sheets discharged onto the sheet discharge tray are stacked and the thin plate elastic member is pushed toward the sheet discharge front end pressing plate side, the thin plate elastic member and the sheet discharge end pressing plate are the same. Even if the recording paper collides with the thin plate elastic member, the thin plate elastic member can bend in the discharging direction, so that even if the recording paper is stacked on the discharge tray to some extent, the recording paper is discharged. The kinetic energy of the recording paper is reliably absorbed, the collision noise between the recording paper and the discharge leading edge pressing plate can be reduced, and the discharged paper storage device that aligns the stacked recording papers to the end properly. Can be provided. According to the fourth aspect of the present invention, even if the thin plate elastic member is pushed toward the paper discharge front end holding plate side by the recording paper stacked on the paper output tray, the upper end portion of the paper output front end pressing plate and the thin plate elastic member. The non-contact state with the upper end of the thin sheet elastic member allows the thin sheet elastic member to be deformed even if new recording sheet is discharged to the sheet discharge tray on which the recording sheet is stacked and collides with the thin sheet elastic member. The kinetic energy of the recording paper is reliably absorbed, the collision noise between the recording paper and the discharge leading edge pressing plate can be reduced, and the discharged paper storage device that aligns the stacked recording papers to the end properly. Can be provided. According to the fifth aspect of the invention, since the thin elastic member can be displaced with respect to the paper discharge tip pressing plate, the kinetic energy of the discharged recording paper is absorbed and the recording paper and the paper discharge tip pressing plate are absorbed. The collision noise can be reduced, and the sheet discharge storage device can be stored in the image forming apparatus while the thin plate elastic member is mounted. According to the invention described in claim 6, since the thin elastic member is provided with the thin damping material, the vibration of the thin elastic material itself, which occurs when the thin elastic material collides with the discharged recording paper, is absorbed by the damping material. The vibration sound of the thin plate elastic member itself can be reduced together with the collision sound and the vibration sound of the recording paper, and a quieter paper discharge storage device can be provided .

[Brief description of drawings]

FIG. 1 is a schematic view of an image forming apparatus equipped with a discharged sheet storage device that is an embodiment of the present invention.

FIG. 2 is a perspective view showing the configuration of the first embodiment of the present invention.

FIG. 3 is a side view showing the configuration of the first embodiment.

4A is a side view showing a collision state between a recording sheet and a thin elastic member, FIG. 4B is a side view showing a displacement state of the thin elastic member at the time of collision, and FIG. 4C is a fall of the thin elastic member. It is a side view which shows a state.

FIG. 5A is a measurement diagram showing noise characteristics of a conventional paper ejection storage device, and FIG. 5B is a measurement diagram showing noise characteristics of the paper ejection storage device of the present invention.

FIG. 6 is a side view showing the configuration of the second exemplary embodiment of the present invention.

FIG. 7 is a side view showing the operation of the second thin plate elastic member in the second embodiment.

FIG. 8 is a side view showing the configuration of the third exemplary embodiment of the present invention.

FIG. 9 is a side view showing the action of the spacer according to the third embodiment.

FIG. 10 is a side view showing a modified example of the third embodiment.

FIG. 11 is a side view showing another modification of the third embodiment.

FIG. 12 is a side view showing still another modification of the third embodiment.

FIG. 13 is a side view showing the configuration of the fourth exemplary embodiment of the present invention.

FIG. 14A is a side view showing a relationship between a flexible member and a thin plate elastic member, which are essential parts of the fourth embodiment, and FIG. 14B is a side view showing an action of the flexible member.

FIG. 15 is a side view showing the configuration of the fifth exemplary embodiment of the present invention.

FIG. 16 is a side view showing the operation of the movable fixture in the fifth embodiment.

FIG. 17 is a perspective view showing the configuration of the fifth embodiment.

FIG. 18 is a perspective view showing a modified example of the fifth embodiment.

FIG. 19 is a side view showing the configuration of the sixth exemplary embodiment of the present invention.

FIG. 20 is a front view showing the configuration of the sixth embodiment.

FIG. 21 is a side view showing the operation of the conventional discharged sheet storage device.

FIG. 22 is a side view showing a stacking state of recording sheets in a conventional discharged sheet storage device.

[Explanation of symbols]

1 Image forming device 10 Paper ejection storage device 11 Paper ejecting edge pressing plate 11a Lower edge of paper ejection front pressing plate 11b Upper edge of the paper ejection edge pressing plate 14 Thin elastic member 14a Upper end of thin plate elastic member 14b Lower end of thin plate elastic member 15, 18, 18 ', 180 Space member (spacer) 17 Second thin plate elastic member 19 Flexible member (sponge material) 20 Movable fixture (hinge) 23 Damping material (sponge) 52 Output tray 62 recording paper a Recording paper ejection direction E Collision part L1 interval

Claims (6)

(57) [Claims] 1. A paper discharge storage device having a paper discharge tray for receiving recording paper discharged from an image forming apparatus, comprising: a paper discharge front end pressing plate provided on the paper discharge tray in the recording paper discharge direction. Of the recording paper, which is provided on the paper discharge tray near the paper discharge leading edge pressing plate, on the recording paper discharging side from the paper discharging leading edge pressing plate, inclined toward the recording paper discharging side. A discharged sheet storage device comprising: a thin plate elastic member that is bent and positioned in its discharge range by its own weight. 2. A second elastic member extending downward toward the upper end of the thin elastic member below the collision portion of the thin elastic member with the recording paper and flexibly positioned in the discharge range of the recording paper by its own weight. 2. The discharged sheet storage device according to claim 1, wherein the thin plate elastic member is provided. 3. A space member is provided between the thin plate elastic member and the paper discharge front end pressing plate, and a space is formed between the thin plate elastic member and the paper discharge front end pressing plate.
Alternatively, the discharged sheet storage device described in 2. 4. The discharged sheet storage device according to claim 1, 2 or 3, wherein a flexible member protruding toward the discharge side of the recording sheet is provided at the upper end of the sheet discharge front pressing plate. 5. A movable fixing member is provided on the paper discharge front end pressing plate,
The discharged sheet storage device according to claim 1, wherein the thin plate elastic member is supported by the movable fixture. 6. The discharged sheet storage device according to claim 1, wherein the thin elastic member is provided with a thin damping material .