JPH061469A - Cassette control device of copying machine - Google Patents

Abstract

PURPOSE:To miniaturize a device main body, to simplify an electric circuit of a device and to reduce cost concerning the cassette control device of a copying machine. CONSTITUTION:When a motor 21 rotates clockwise seen from the right side of a drawing 1, its rotation is transmitted to a clutch 25 by a pulley 22, a belt 23 and a pulley 24, and one shaft of the clutch 25 rotates clockwise as well as the motor 21. Clockwise rotation of the one shaft of the clutch 25 is transmitted to the other shaft. When the other shaft rotates, a coupling 28 rotates, and a coupling 29 rotates in a first paper feeding cassette seen from the left side of the drawing 1. Consequently, a lever 71 rotates, a base plate is lifted upward by the head end part of the lever 71, a sheet is made contact with a paper feeding roller and is put in the state to be fed. When the motor 21 rotates counterclockwise, a lever 72 rotates in a second paper feeding cassette, the base plate is lifted upward by the head end part of the lever 72, the sheet is made contact with the paper feeding roller and is put in the state to be fed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette controller for a copying machine having a multi-stage paper feeding function.

[0002]

2. Description of the Related Art Conventionally, a copying machine having a multi-stage paper feeding function has independently provided a mechanism for lifting up the paper in a paper feeding cassette so that the paper can be fed.

Further, in order to select the paper feed / non-paper feed of each cassette, an electromagnetic clutch or solenoid for controlling the paper feed roller or the like and their drive circuits are independently provided for each cassette.

[0004]

Therefore, in the conventional copying machine, the motor as a power source for lifting up the paper and its drive circuit must be provided independently for each cassette, and the main body of the apparatus is required. Was large, the electric circuit of the device was complicated, and the overall cost was high.

Further, since the electromagnetic clutches or solenoids for controlling the paper feed rollers and the like and their drive circuits are independently provided for each cassette, the main body of the apparatus becomes large and the electric circuit of the apparatus becomes complicated, Overall it was expensive.

It is an object of the present invention to provide a cassette control device which can downsize the device body, simplify the electric circuit of the device, and reduce the cost.

[0007]

According to the first invention of the present application, the object is to have a motor, a first shaft and a second shaft, and the first shaft rotates in one direction. A first one-way clutch that transmits the rotation of the first shaft to the second shaft only when the rotation of the first shaft, first transmission means configured to transmit the rotation of the motor to the first shaft, and The first coupling member provided on the shaft and the copying machine body are configured to be detachable.
A first paper feed cassette having a first base plate on which a sheet is placed, and a first paper feed cassette rotatably supported by the first paper feed cassette,
A first lever that raises the first base plate by rotating it in one direction so that the paper placed on the first base plate can be fed, and a first lever connected to the first lever. It is detachable from the first coupling member, and the rotation of the second shaft
Has a second coupling member for transmitting to the lever, a third shaft, and a fourth shaft, and only when the third shaft rotates in one direction, the rotation of the third shaft is changed to the fourth shaft. Second transmitted to the shaft
A one-way clutch, a second transmission means configured to reverse the rotation of the motor to selectively transmit the second shaft and the fourth shaft and transmit the rotation to the third shaft, and A third coupling member provided on the shaft of the second sheet feeding device, a second paper feed cassette that is detachably attached to the main body of the copying machine, and has a second base plate on which a sheet is placed, and a second paper feeding cassette. A second lever that is rotatably supported by the paper cassette and that raises the second base plate by rotating in one direction so that the paper placed on the second base plate can be fed. And connected to the second lever and detachable from the third coupling member,
And a fourth coupling member for transmitting the rotation of the fourth shaft to the second lever, which is achieved by the cassette control device of the copying machine.

According to the cassette control device of the first invention,
When the motor rotates, the rotation of the motor is transmitted to the first shaft of the first one-way clutch via the first transmission member, and the rotation is reversed by the second transmission member to generate the second rotation of the first one-way clutch. It is transmitted to the third shaft of the directional clutch. When the motor rotates in a predetermined one direction, the rotation of the first shaft is transmitted to the second shaft in the first one-way clutch, while the rotation of the third shaft is transmitted to the second shaft in the second one-way clutch. It is not transmitted to the 4th axis.

Therefore, the rotation of the motor is transmitted to the first lever through the first coupling member and the second coupling member, and the first base plate in the first sheet feeding cassette is moved to the first lever. Rotation causes the sheet placed on the first base plate to come into contact with the sheet feed roller, and the sheet is ready to be fed. On the other hand, since the rotation of the motor is not transmitted to the third shaft, the second lever does not rotate, and the sheet placed on the second base plate in the second sheet feeding cassette is kept in the unfeedable state. To be done.

When the motor rotates in the other direction opposite to the above-mentioned predetermined one direction, the third one in the second one-way clutch is used.
The rotation of the shaft is transmitted to the fourth shaft, but the rotation of the first shaft in the first one-way clutch is not transmitted to the second shaft. Therefore, the rotation of the motor is transmitted to the second lever via the third coupling member and the fourth coupling member, and the second base plate in the second paper feeding cassette is rotated by the rotation of the second lever. The sheet that has risen and is placed on the second base plate is brought into contact with the sheet feeding roller, and the sheet can be fed. On the other hand, since the rotation of the motor is not transmitted to the first shaft, the first lever does not rotate, and the paper placed on the first base plate in the first paper feed cassette is kept in the unfeedable state. To be done.

As a result, by changing the rotation direction of the motor, the paper stored in one of the two paper feed cassettes can be selectively lifted up to be in the paper feedable state. Therefore, it is not necessary to provide a motor and a motor drive circuit for each paper feed cassette, the apparatus main body can be downsized, the electric circuit of the apparatus can be simplified, and the cost can be reduced.

According to the second invention of the present application, the above object is to:
A motor, a first coupling member, a transmission means configured to transmit the rotation of the motor to the first coupling member, and a detachable structure of the copying machine body, and a table on which a sheet is placed. A paper feed cassette having a plate and a paper feed cassette that is rotatably supported by the paper feed cassette. The base plate is selectively placed so that the paper placed on the base plate can be selectively fed or cannot be fed. A plurality of levers that move up and down and a plurality of second coupling members that are connected to the levers and that are detachable from the first coupling member and that transmit the rotation of the first coupling member to the levers. Is achieved by the cassette control mechanism of the copying machine.

According to the cassette controller of the second invention,
When the motor rotates, the rotation of the motor is transmitted to the first lever via the first coupling member and the second coupling member.

When the motor rotates in a predetermined direction, the base plate of the paper feed cassette is lifted by the rotation of the lever to bring the paper placed on the base plate into contact with the paper feed roller, so that the paper can be fed. To do. When the motor rotates in the direction opposite to the above-described predetermined direction, the base plate of the paper feed cassette is lowered by the rotation of the lever to separate the paper placed on the base plate from the paper feed roller and feed the paper. Make it impossible.

Therefore, the sheets accommodated in the cassettes can be selectively set to the sheet feedable state or the sheet non-feedable state by the rotation of the motor, and the sheet feeding operation of any cassette can be independently performed in each sheet feeding cassette. It can be performed only by controlling the rotation of each motor without controlling the sheet feeding roller provided.

As a result, the electromagnetic clutch or solenoid for controlling the feeding and non-feeding, and the drive circuit for them need not be provided for each cassette, but only one set need be provided, and the apparatus main body can be miniaturized. At the same time, the electric circuit of the device can be simplified and the cost can be reduced.

[0017]

The present invention will be described below in detail with reference to the preferred embodiments shown in the drawings.

FIG. 1 shows an example of a cassette control mechanism according to the first invention.

25 and 36 are one-way clutches,
When one shaft located on the left side of the clutch 25, 36 rotates clockwise as viewed from the right side of the drawing, the other shaft located on the right side of the clutch 25, 36 rotates respectively. Conversely, when one shaft rotates counterclockwise, the other shaft does not rotate.

The rotation of the motor 21 is transmitted to one shaft of a clutch 25 via a pulley 22, a belt 23 and a pulley 24,
On the other hand, the rotation of the motor 21 is reversed by the gear 33 and the gear pulley integrated member 51, and the belt 34 and the pulley 35 are rotated.
Is transmitted to one shaft of the clutch 36 via.

The rotating member 2 is attached to the other shaft of the clutches 25 and 36.
6,37 are attached respectively, as shown in FIG.
A plurality of inclined claws are provided on the outer peripheral portions of the rotating members 26, 37. The levers 27 and 38 are arranged such that one end of the levers engages with the pawl to prevent counterclockwise rotation of the other shaft.

The lever 27 is rotatably supported by a shaft 62, and the tension spring 61 has one end supported at the other end of the lever 27.
The other end of is attached. Therefore, the distal end portion of the lever 27 is pressed against the outer peripheral portion of the member 26 by the pulling force of the spring 61.

When the member 26 rotates clockwise, the lever 27 is pushed up by the claws of the member 26 so that the member 26 can rotate. On the other hand, when the member 26 rotates counterclockwise, the claw of the member 26 is caught on the tip of the lever 27,
Rotation of member 26 is prevented.

Couplings 28 and 39 are further attached to the other shafts of the clutches 25 and 36, respectively.

As shown in FIG. 4, the first paper feed cassette 73
Is provided with a coupling 29 that engages with the coupling 28 when the cassette 73 is mounted, and the second paper feed cassette 74 is engaged with the coupling 39 when the cassette 74 is mounted. A matching coupling 40 is provided,
When the cassettes 73 and 74 are moved in the directions of the arrows A, the engagement between the couplings 28 and 39 and the couplings 29 and 40 is released.

Arms 71 and 72 are attached to the shafts of the couplings 29 and 40.
Are installed respectively.

An example of the drive circuit for the motor 21 is shown in FIG.
This circuit consists of PNP transistors 4,5 and NPN transistors 6,7
And inversion circuits 2 and 3. The collectors of the transistors 5 and 7 are both connected to one end of the motor 21, the emitter of the transistor 5 is connected to the 24V power source, and the emitter of the transistor 7 is connected to the ground.
The collectors of the transistors 4 and 6 are both connected to the other end of the motor 21, the emitter of the transistor 4 is connected to the 24V power source, and the emitter of the transistor 6 is connected to the ground. The bases of transistors 6 and 7 are
It is connected to ports a and b of CPU1. On the other hand, the bases of the transistors 4 and 5 are connected to the output terminals of the inverting circuits 2 and 3, respectively, and the input terminals of the inverting circuits 2 and 3 are connected to the ports a and b of the CPU 1, respectively.

When the port a of the CPU 1 is at high level and the port b is at low level, the output of the inverting circuit 2 becomes low level, the output of the inverting circuit 3 becomes high level, the transistors 4 and 7 are turned on, and the transistors 5 and 5 are turned on. 6 turns off. As a result, the motor 21
A current flows in the direction indicated by the solid line, and the motor 21 rotates, for example, clockwise. On the other hand, when the port a of the CPU1 is low level and the port b is high level, the output of the inverting circuit 2 is high level, the output of the inverting circuit 3 is low level, the transistors 4 and 7 are turned off, and the transistors 5 and 6 are turned off. Turns on. As a result, a current flows in the motor 21 in the direction indicated by the broken line, and the motor 21 rotates counterclockwise. When both the ports a and b of the CPU1 are at the low level, the transistors 4 to 7 are all turned off and the motor 21 does not rotate because the current does not flow to the motor 21.

Next, the operation will be described. When the motor 21 rotates clockwise as viewed from the right side of FIG.
2, transmitted to the clutch 25 by the belt 23 and the pulley 24, and one shaft of the clutch 25 rotates clockwise like the motor 21. The clockwise rotation of one shaft of the clutch 25 is transmitted to the other shaft, and the other shaft also rotates clockwise.
When the other shaft rotates clockwise, the rotating member 26 rotates while the claw of the rotating member 26 pushes up the tip of the lever 27,
The rotation of the rotating member 26 is not blocked by the lever 27.

When the other shaft of the clutch 25 rotates, the coupling 28 rotates, and as shown in FIG. 3 (a), the coupling 29 that is coupled with the coupling 28 is the first feed seen from the left side of FIG. It rotates in the direction of arrow B in the paper cassette 73. Therefore, the lever 71 rotates, and the base plate 30 is lifted up at the tip of the lever 71, and the paper 31 placed on the base plate 30 is brought into contact with the paper feed roller 32 so that the paper can be fed.

On the other hand, the clockwise rotation of the motor 21 depends on the gear.
The rotation direction is reversed by the 33 and the gear pulley integrated member 51 and transmitted to the clutch 36 via the belt 34 and the pulley 35. In this case, however, one shaft of the clutch 36 is rotated counterclockwise. The rotation of one shaft is not transmitted to the other shaft, and the base plate 41 and the paper 42 are not lifted up in the second paper feed cassette.

Next, when the motor 21 rotates counterclockwise, the rotation is transmitted to the clutch 25 by the pulley 22, the belt 23 and the pulley 24, and one shaft of the clutch 25 is rotated counterclockwise. Therefore, the rotation is not transmitted to the other shaft, and therefore, the base plate 30 and the paper 31 are not lifted up in the cassette 73.

On the other hand, the counterclockwise rotation of the motor 21 is transmitted to the clutch 36 via the belt 34 and the pulley 35 after the rotation direction is reversed by the gear 33 and the gear pulley integrated member 51. And in this case, since one shaft is rotated clockwise, the rotation is transmitted to the other shaft and the coupling
39 and 40 rotate. Therefore, as shown in Fig. 3 (b),
In the second paper feed cassette 74, the lever 72 rotates in the direction of the arrow B, and the base plate 41 is lifted up at its leading end to feed the paper 42 placed on the base plate 41 to the paper feed roller 43. Contact
Enables paper feed.

When the rotation of the motor 21 is stopped, the paper is
The levers 71 and 72 are rotated counterclockwise by the weights of the levers 31 and 42 and the base plates 30 and 41, and the weight of the levers 71 and 72 (arrow B in FIG. 3).
Counterclockwise rotation of the members 26 and 37, but because the claws of the members 26 and 37 are caught on the tips of the levers 27 and 38, respectively, the counterclockwise rotation of the levers 27 and 38 occurs. Rotation around is blocked. Therefore, the lifted-up state of the sheets 31 and 42 in the cassettes 73 and 74 is maintained.

In order to release the lift-up state, as shown in FIG. 4, the cassettes 73 and 74 may be moved in the directions of the arrows A to be removed from the main body of the apparatus, whereby the couplings 28 and 29 can be removed. Coupling or coupling 39 with
40 is disengaged, levers 71 and 72 are paper 31, 42 and base plate.
It rotates counterclockwise (in the direction opposite to arrow B in Fig. 3) due to the weight of 30,41 and the own weight of the levers 71,72, and the base plate 3
0 and 42 descend respectively.

FIG. 6 shows an example of the cassette control mechanism of the copying machine according to the second invention. The motor 81 is driven by, for example, the circuit shown in FIG. 5 and rotates clockwise or counterclockwise when viewed from the right side of FIG. The rotation of the motor 81 is
It is transmitted to the rotating shaft 88 via the belt 82, the belt 83 and the pulley 84. A coupling 85 is attached to the other end of the rotary shaft 88. The cassette 89 is provided with a coupling 86 that engages with the coupling 85 when the cassette 89 is mounted, and a lever 87 is attached to the shaft of the coupling 86. When the cassette 89 is moved in the direction of arrow C, the coupling between the coupling 85 and the coupling 86 is released.

Next, the operation will be described. When the motor 81 is rotated clockwise when viewed from the right side of FIG.
It is transmitted to the rotary shaft 88 via the belt 82, the belt 83 and the pulley 84, and the coupling 85 rotates clockwise. This rotation is transmitted to the coupling 86, so that in the cassette 89, as shown in FIG. 7, the cassette 89 seen from the left side of FIG.
Inside, the lever 87 rotates in the direction of the arrow D, and the base plate 90 is pushed upward by the tip of the lever 87, and the paper 91 placed on the base plate 90 is brought into contact with the paper feed roller 92, and the paper can be fed. To do.

On the contrary, when the motor 81 is rotated counterclockwise, the rotation is similarly transmitted to the lever 87,
Contrary to the above case, 87 rotates in the direction opposite to arrow D.
As a result, the base plate 90 descends together with the paper sheet 91, and the paper sheet 91 is separated from the paper feed roller 92 to be in a paper feed impossible state.

Therefore, as shown in FIG. 8, such a cassette control mechanism is provided for each sheet feeding cassette. For example, when the sheet is raised in the cassette 93 and lowered in the cassette 94, it is provided for each cassette. Even if all the transport rollers 95 and the paper feed rollers 92 are rotated, the paper is fed only from the cassette 93.

[0040]

According to the cassette control device of the present invention, when the motor rotates, the rotation of the motor is transmitted to the first shaft of the first one-way clutch via the first transmission member. The rotation is inverted by the second transmission member and transmitted to the third shaft of the second one-way clutch. When the motor rotates in a predetermined one direction, the rotation of the first shaft is transmitted to the second shaft in the first one-way clutch, while the rotation of the third shaft is transmitted to the second shaft in the second one-way clutch. It is not transmitted to the 4th axis.

Therefore, the rotation of the motor is transmitted to the first lever through the first coupling member and the second coupling member, and the first base plate in the first sheet feeding cassette is moved to the first lever. Rotation causes the sheet placed on the first base plate to come into contact with the sheet feed roller, and the sheet is ready to be fed. On the other hand, since the rotation of the motor is not transmitted to the third shaft, the second lever does not rotate, and the sheet placed on the second base plate in the second sheet feeding cassette is kept in the unfeedable state. To be done.

When the motor rotates in the other direction opposite to the above-mentioned predetermined one direction, the third one in the second one-way clutch is used.
The rotation of the shaft is transmitted to the fourth shaft, but the rotation of the first shaft in the first one-way clutch is not transmitted to the second shaft. Therefore, the rotation of the motor is transmitted to the second lever via the third coupling member and the fourth coupling member, and the second base plate in the second paper feeding cassette is rotated by the rotation of the second lever. The sheet that has risen and is placed on the second base plate is brought into contact with the sheet feeding roller, and the sheet can be fed. On the other hand, since the rotation of the motor is not transmitted to the first shaft, the first lever does not rotate, and the paper placed on the first base plate in the first paper feed cassette is kept in the unfeedable state. To be done.

As a result, one of the two paper feed cassettes is selectively driven by changing the rotation direction of the motor, and the paper stored in the one paper feed cassette is selectively lifted up and fed. Can be enabled. Therefore, it is not necessary to provide a motor and a motor drive circuit for each paper feed cassette,
The main body of the device can be miniaturized and the electric circuit of the device can be simplified, and the cost can be reduced.

According to the cassette controller of the present invention,
When the motor rotates, the rotation of the motor is transmitted to the first lever via the first coupling member and the second coupling member.

When the motor rotates in a predetermined direction, the base plate of the paper feed cassette is lifted by the rotation of the lever to bring the paper placed on the base plate into contact with the paper feed roller, so that the paper can be fed. To do.

When the motor rotates in the direction opposite to the above-described predetermined direction, the base plate of the paper feed cassette is lowered by the rotation of the lever to separate the paper placed on the base plate from the paper feed roller, To make it impossible to feed paper.

Therefore, the sheets accommodated in the cassettes can be selectively set to the paper feedable state or the paper nonfeedable state by the rotation of the motor, and the paper feeding operation of an arbitrary cassette can be performed independently for each paper feeding cassette. It can be performed only by controlling the rotation of each motor without controlling the sheet feeding roller provided.

As a result, the electromagnetic clutch or solenoid for controlling the feeding and non-feeding, and the drive circuit for them need not be provided for each cassette, but only one set need be provided, and the apparatus main body can be miniaturized. At the same time, the electric circuit of the device can be simplified and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of a cassette control device according to the first invention.

FIG. 2 is a partial front view of FIG.

3 is a side view of a paper feed cassette controlled by the cassette control device of FIG. 1. FIG.

4A and 4B are explanatory views of an operation of releasing the combination of the sheet feeding cassettes in the cassette control device of FIG.

5 is a drive circuit diagram of a motor constituting the cassette control device of FIG. 1. FIG.

FIG. 6 is a side view of an embodiment of the cassette control device according to the second invention.

FIG. 7 is a side view of a paper feed cassette controlled by the cassette control device of FIG.

8 is an explanatory diagram of paper feed cassette control by the cassette control device of FIG.

[Explanation of symbols]

 1 CPU 2,3 Inversion circuit 4,5 PNP transistor 6,7 NPN transistor 21,81 Motor 22,24,35,82,84 Pulley 23,34,83 Belt 25,36 One side clutch 26,37 Rotating member 27,38 , 71,72,87 Lever 28,29,39,40,85,86 Coupling 30,41,90 Base plate 31,42,91 Paper 32,43,92, Paper feed roller 61 Spring 62 Axis 73,74, 89,93,94 Paper cassette 88 Rotating shaft 95 Conveying roller

Claims (2)

[Claims] 1. A motor and a first shaft and a second shaft, wherein the rotation of the first shaft is transferred to the second shaft only when the first shaft rotates in one direction. A first one-way clutch for transmission, first transmission means configured to transmit rotation of the motor to the first shaft, and a first coupling member provided on the second shaft. A first paper feed cassette, which is detachably attached to the main body of the copying machine and has a first base plate on which paper is placed; and rotatably supported by the first paper feed cassette, Connected to the first lever and a first lever that raises the first base plate by rotating in one direction so that a sheet placed on the first base plate can be fed. And is detachably attached to the first coupling member to rotate the second shaft with the first coupling member.
Has a second coupling member for transmitting to the lever, a third shaft, and a fourth shaft, and only when the third shaft rotates in one direction, the rotation of the third shaft is A second one-way clutch that transmits to a fourth shaft, and reverses the rotation of the motor to selectively rotate the second shaft and the fourth shaft and transmits to the third shaft. Second configured to
Second transmission unit, a third coupling member provided on the fourth shaft, and a second base plate configured to be detachable from the main body of the copying machine and having a second base plate on which a sheet is placed. It is rotatably supported by a paper cassette and the second paper feed cassette, and is rotated by the one direction so that the paper placed on the second base plate can be fed. A second lever that raises the second base plate, and a second coupling lever that is connected to the second lever and is detachable from the third coupling member, and rotates the fourth shaft to the second lever. A cassette control device for a copying machine, comprising: a fourth coupling member for transmission. 2. A motor, a first coupling member, a transmission means configured to transmit the rotation of the motor to the first coupling member, and a detachable structure of the copying machine main body. A paper feed cassette having a base plate on which paper is placed, and rotatably supported by the paper feed cassette,
A lever for moving the base plate up and down so as to selectively bring a sheet placed on the base plate into a feedable state or a nonfeedable state, and the first coupling coupled to the lever A cassette control mechanism for a copying machine, comprising: a plurality of second coupling members that are detachable from a member and that transmit the rotation of the first coupling member to the lever.