JPH0781791A - Paper feeding device - Google Patents

Abstract

PURPOSE:To prevent slip down of loaded papers owing to inclination of a tray when a regulating member is brought into a move-aside position, in a paper feeding device which is constituted to load paper sheets on a tray having a front inclined in a down state and deliver loaded papers, in order, from below as a delivery amount is regulated by a regulating member through drive of a conveying means. CONSTITUTION:A tray 13a is arranged to a device body 13 in a state that a front is inclined in a down state and a lateral cover 39 with which the front side of the tray 13a is covered is rotatably arranged. A holder 41 is attached to the lateral cover 39 in a state to point to the tray 13a. A regulating member 40 is arranged to the lower end of the holder 41, and the regulating member 40 is openable to a regulation position, where a delivery amount of paper sheets S is regulated, and a moving aside position. A paper receiving member 20 to prevent slip down of loaded papers S owing to inclination of the tray 13a as a result of the loaded papers S being received when the regulating member 40 is brought into the moving-aside position is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet processing apparatus such as a shredder, a printer, a copying machine, a facsimile, etc., for supplying sheets of waste paper, transfer paper, copy paper, etc. to shred, transfer, copy, etc. Applicable. More specifically, the present invention relates to a sheet feeding device for feeding a sheet into the main body of the sheet processing apparatus.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 9, for example, as shown in FIG. 9, a tray 1 is provided in a sheet feeding device of this type with the front side, which is the left side in the figure, inclined downward, and a conveyor belt is provided along the inclination. Two
Is stretched between the pulleys 3 and 4, a pressure member 5 is provided on the upper front side of the tray 1, and a plate-shaped holder 6 is arranged at a substantially right angle to the tray 1, and the holder 6 is conveyed to the lower end of the holder 6. There is one in which a regulating member 7 that forms a predetermined gap g with the belt 2 is provided. Then, at the time of sheet feeding, the pressing member 5 is pulled up and then the sheets S are stacked on the tray 1, and the front end side thereof is pressed by the pressing member 5 from above as shown in FIG. The stacking sheets S are sequentially fed out from the bottom while the feeding amount is regulated by the regulating member 7.

Further, as shown in FIG. 10, this paper feeding device is provided with an opposite side plate b of the device main body a for paper jam processing and the like.
A lateral cover 8 covering the front is rotatably provided. The lateral cover 8 includes a front plate portion 8a, side plate portions 8b on both sides thereof,
It is formed by a guide plate portion 8c having an arc surface shape. Then, the holder 6 is provided on the side facing the front plate portion 8a, and the regulating member 7 is attached to the tip of the holder 6, and the regulating member 7 rotates with the lateral cover 8 and the retracted position indicated by the solid line in FIG. It can be opened and closed in any position. Then, at the time of feeding, for example, when the fed-out sheet S is caught in the gap g and causes a paper jam, the restricting member 7 is set to the retracted position as shown by a chain line in FIG. 9 and opened as shown in FIG. Was there.

[0004]

However, in the conventional paper feeding device, when the regulating member 7 is opened to deal with a trouble such as a paper jam, the stacked sheets S remaining on the tray 1 are stored in the tray. There was a problem of slipping off due to the inclination of 1.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to prevent the stacked sheets on the tray from slipping off when troubles such as paper jams are dealt with in the above-mentioned paper feeder.

[0006]

Therefore, the present invention provides
For example, as shown in the following illustrated embodiment, the sheets S are stacked on a tray 13a which is provided with its front side inclined downward,
The regulation member 4 is driven by driving a transportation device such as the transportation belt 14.
The stacking sheets S are arranged in order from the bottom while controlling the feeding amount at 0.
In the sheet feeding device 12 that feeds the sheet, the regulation member 40 is provided to be openable and closable between the regulation position and the retracted position, and when the regulation member 40 is in the retracted position, the stacked sheets S are received and the tray 13a is inclined. A sheet receiving member 2 for preventing the stacked sheets S from sliding down
It is characterized in that 0 is provided.

[0007]

In the present invention, for example, when troubles such as paper jam are dealt with and the regulating member 40 is opened to the retreat position, the stacked sheets S are transferred to the tray 13 by the sheet receiving member 20.
a Prevent slipping from the top.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a schematic diagram showing an internal mechanism of a shredder provided with a paper feeding device according to an embodiment of the present invention.

Reference numeral 10 in the figure denotes a shredder body.
The shredder main body 10 has a vertically long box shape, and a manual sheet feeding input port 10a is opened on the upper left side in the figure, and a loading guide 10b is provided obliquely downward to the right from the loading port 10a. The paper feed path 10c is formed. The cutter 11 is installed at the tip of the paper feed path 10c. Then, the paper feeder 12 of the present invention is provided above the shredder body 10.

The paper feeding device 12 is provided with a tray 13a on the upper side of the main body 13 of the paper feeding device, with its front side (left side in FIG. 2) inclined downward, for example, by about 30 degrees, and on both sides of the tray 13a in FIG. As shown, each of the opposite side plates 13b and 13b has a front portion extending upward. Tray 13
A has a long opening (not shown) in the sheet feeding direction A on the upper surface thereof, and as shown in FIG. 2, the conveyance belt 14 is arranged so that the upper side is exposed from the opening. The conveyor belt 14 is stretched between the pulleys 15 and 16 supported by the opposite side plates 13b and 13b, respectively. A paper feed motor 17 is provided below the front pulley 16. The paper feed motor 17 has a drive shaft 17a having a pulley 1
Attach 8. Then, the transmission belt 19 is extended substantially horizontally between the pulley 18 and a pulley (not shown) attached to the shaft of the pulley 15 on the front side of the conveyor belt 14.

Further, the apparatus main body 13 is provided with a pair of side guides 21 facing each other on the tray 13a for restricting the stacking position of the stacked sheets S. The side guides 21 are provided so as to be movable in association with each other in a direction parallel to the sheet feeding direction A and orthogonal to the sheet feeding direction A. And both side guides 21
The space between them can be adjusted according to the sheet size.

Further, the apparatus main body 13 includes a facing side plate 13
A horizontally long box-shaped storage cover 2 between the upper front sides of b and 13b.
4, the pressurizing means 25 is provided in the storage cover 24. The pressurizing means 25 is the opposite side plate 13 b of the storage cover 24.
A pressure plate assembly 27 that can move up and down along the guide slit 26 of 13b is provided. Further, the apparatus main body 13 is provided with a pressurizing motor 28 provided substantially in the center thereof, a worm 30 provided on a drive shaft of the pressurizing motor 28, and a worm wheel 31 meshing with the worm 30. Further, the transmission belt 32 is stretched between the pulley 31a coaxial with the worm wheel 31 and the drive pulley 33, the shaft 29 of the drive pulley 33, the drive pulley 33, and the driven pulley 34 fixed at a position separated from the drive pulley 33. It is composed of the passed wire 35 and the like. The wire 35 is attached to the pressure plate assembly 27. Pressure plate assembly 27
In the initial stage, is retracted to the top dead center so that the stacked sheets S can be stacked on the lower tray 13a.

As shown in FIGS. 3 and 4, the pressure plate assembly 27 relatively moves a pressure upper plate 27a having an inverted U-shaped cross section and a pressure lower plate 27b having a U-shaped cross section within a predetermined vertical range. A plurality of springs 36 that urge them in a direction in which they are separated from each other.
And a pressure detection sensor 37 that operates with the pressure lower plate 27b. The strength of the spring 36 when attached is set to, for example, 3 to 5 kg. Then, the pressurizing motor 2 is turned on / off by the pressurizing sensor 37.
8 is configured to control the operation.

That is, when the pressure plate assembly 27 presses the stacked sheets S with a predetermined pressure, the pressure lower plate 27b is pushed up against the spring 36, and the pressure detection sensor 37 is turned on, as shown in FIG. Then, the pressurizing motor 28 is turned off, and the lowering of the pressurizing plate assembly 27 is stopped. Since the pressurizing motor 28 inertially rotates for a while even after being turned off, the actuator of the pressurizing detection sensor 37 is further pushed within the range of overtravel. When the number of stacked sheets S decreases, the pressure lower plate 27b is pushed down by the spring 36, and the pressure detection sensor 3
When the actuator of No. 7 returns to the position beyond the release position, the sensor 37 is turned off. Then, the pressurizing motor 28 is turned on, and the pressurizing plate assembly 27 descends until the pressurization detecting sensor 37 is turned on again. Therefore, the pressure plate assembly 27
Prevents the non-feeding due to the decrease of the sheet conveying force by always pushing the stacked sheets S within a constant pressure range.

Further, in this paper feeding device 12, the upper end of a thin sheet receiving member 20 is attached to the front side of the storage cover 24 in the sheet feeding direction A. Then, as shown in FIG. 1, the sheet receiving member 20 hangs down from the approximate center of the storage cover 24 toward the tray 13a.

Further, in the paper feeding device 12, as shown in FIG. 2, the front side between the facing side plates 13b and 13b is covered by the lateral cover 3.
9, the lateral cover 39 is supported rotatably around a support shaft (not shown) above the front side of the opposite side plate portions 13b and 13b for paper jam processing and the like. Side cover 39
Includes a front plate portion 39a, side plate portions 39b on both sides of the front plate portion 39a, and guide plate portions 39c having an arc surface between the lower sides of the side plate portions 39b. Then, on the side facing the front plate portion 39a, the plate-shaped metal holder 4 is provided along the sheet receiving member 20.
1 is attached via the attachment portion 41a. Then, one of the pair of conveying rollers 44, 44 is supported by the side surface plate portion 39b, and a part of the conveying roller 44 is exposed from the roller window of the guide plate portion 39c.

The holder 41 is formed by bending its lower end into an L shape, and an elongated regulating member 40 made of urethane rubber or the like is attached to the center of the lower end in the width direction. Then, a gap g is formed between the regulation member 40 and the tray 13a. The holder 41 can be automatically moved up and down by a gap adjusting mechanism (not shown) including a gap control motor and the like to adjust the size of the gap g.

In the sheet feeding device 12, the sheet conveying path 43 leading from the gap g to the sheet feeding path 10c is formed, and the conveying roller 55 is provided at the tip of the sheet conveying path 43.

Next, FIG. 6 shows the electrical construction of the sheet feeding device 12. The paper feeding device 12 is entirely controlled by a microcomputer. The CPU 45 of the microcomputer determines, for example, whether the pressure detection sensor 37 is on or off, and controls the driver circuit 46 that drives the pressure motor 28. It should be noted that the sheet
When the jam occurs, the jam detection sensor 47 detects the jam. The presence / absence of the sheet S on the tray 13a is detected by the paper presence / absence sensor 48, and the fact that the pressure plate assembly 27 is retracted to the top dead center is detected by the top dead center sensor 49. Further, the paper feeder 12 is connected to the shredder main body 1 by the connector 50.
The electric current detection sensor 51 can detect that the shredder body 10 is overloaded and stopped.

Now, in the illustrated shredder, the sheet S
When shredded, the sheets S are stacked on the tray 13a as shown in FIG. Then, the front end of the stacked sheet S is received by the sheet receiving member 20. Further, the side guide 21 is moved according to the width size of the stacked sheets S,
The side guide 21 is applied to the side edge of the stacked sheets S. Then, a start switch (not shown) is pressed to start the apparatus main body 13, the pressurizing motor 28 is driven to operate the pressurizing means 25, and the pressurizing plate assembly 27 is lowered to move the stacking sheet S to the front end side in the feeding direction A. Hold from above.

Therefore, at the time of sheet feeding, the sheet feeding motor 17 is driven to rotate the conveyor belt 14 to feed the stacked sheets S from below. Then, the stacked sheet S is fed in the A direction while the feeding amount is regulated by the regulation member 40. Then, the sheet is conveyed by the pair of conveying rollers 44, 44 through the sheet conveying path 43, and the conveying roller 55 is used to feed the sheet feeding path 10c of the shredder main body 10.
Throw in. Then, the stacked sheets S are cut by the cutter 11
Shred with.

After all the stacked sheets S have been fed, the paper presence sensor 48 detects the absence of paper, and after a lapse of a certain time, the drive of the paper feeding motor 17 is stopped and the pressure assembly 27 is raised. The paper feed device 1
2 is returned to the ready state shown in FIG.

By the way, in the paper feeding device 12 of the present invention,
For example, when a paper jam occurs during paper feeding, as shown in FIG. 1, the lateral cover 39 is rotated to open the regulating member 40 to the retracted position shown in the drawing to perform the paper jam processing. When the regulating member 40 is in the retracted position, the sheet receiving member 2
When 0, the stacked sheets S are prevented from slipping off the tray 13a.

In the paper feeding device 12 of the present invention,
As the sheet receiving member 20, a member having elasticity such as a thin stainless steel plate having a thickness of about 0.5 mm may be used. By doing so, even when the side cover 39 is opened and a trouble such as a paper jam is being dealt with, even if a hand or the like accidentally hits the sheet receiving member 20 and the sheet is temporarily deformed, the elasticity immediately restores the original state. Since the shape is restored, it is possible to more reliably prevent the stacked sheets S on the tray 13a from slipping off.

[0025]

Therefore, according to the present invention, the sheets are stacked on the tray provided with the front side inclined downward, and the stacked sheets are sequentially loaded from the bottom while the conveying means is driven to regulate the feeding amount by the regulating member. In the sheet feeding device for feeding, the restriction member is provided to be openable and closable between the restriction position and the retracted position, and when the restriction member is in the retracted position, the stacked sheet is received and the stacked sheet is prevented from sliding down due to the inclination of the tray. By providing the sheet receiving member, it is possible to prevent the stacked sheets from slipping off the tray when the restricting member is opened to deal with trouble such as paper jam.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a sheet feeding device according to an embodiment of the present invention in a state where a regulating member thereof is open.

FIG. 2 is a schematic configuration diagram showing a sheet feeding device in a state in which the regulating member is closed and an internal structure of an upper portion of a shredder main body provided with the regulating device.

FIG. 3 is a front view of a pressure plate assembly of a pressure unit in the sheet feeding device.

FIG. 4 is a side view showing the inside of the pressure plate assembly in section.

FIG. 5 is a side view of the same pressurized state.

FIG. 6 is a block diagram showing an electrical configuration of the sheet feeding device.

FIG. 7 is a diagram illustrating a stacked sheet set state of the sheet feeding device.

FIG. 8 is a ready state diagram of the sheet feeding device before setting stacked sheets.

FIG. 9 is a schematic side view of a conventional paper feeding device.

FIG. 10 is a schematic perspective view showing the sheet feeding device in a state where the regulating member is open.

[Explanation of symbols]

 12 Paper Feeding Device 13a Tray 14 Conveying Belt (Conveying Means) 20 Sheet Receiving Member 40 Restricting Member S Sheet

Claims (1)

[Claims] 1. A sheet feeding device for stacking sheets on a tray provided with its front portion inclined downward and driving the conveying means to regulate the delivery amount by a regulation member, and feeding out the stacked sheets in order from below, in the sheet feeding device. A member is provided so as to be openable and closable between a regulation position and a retracted position, and a sheet receiving member that receives the stacked sheets when the regulating member is in the retracted position and prevents the stacked sheets from sliding down due to the inclination of the tray is provided. A paper feeder.