TW201522095A - Double-sided sheet feeding device and feeding mechanism thereof - Google Patents

Abstract

A double-sided sheet feeding mechanism performing the function of double-sided feeding without changing the rotating direction of the power source is provided and includes a sheet feeding wheel unit, a damp transmission unit and an electromagnetic clutch. The sheet feeding wheel unit has a wheel shaft, at least a driving wheel and a driven wheel. The wheel shaft drives the driving wheel to drive the driven wheel for sheet delivering. The damp transmission unit is individually connected to the power source and the wheel shaft. The damp transmission unit has a damp transmission member connecting to the wheel shaft via a coupling force, so that the power source drives the wheel shaft to rotate toward a first direction. The electromagnetic clutch is individually connected to the power source and the wheel shaft. The electromagnetic clutch is driven by the power source so as to rotate toward a second direction opposite to the first direction. The electro-magnetic clutch is detachably connected with the wheel shaft. The connecting force between the electro-magnetic clutch and the wheel shaft is larger than the coupling force between the damp transmission member and the wheel shaft, so that the connecting force drives the wheel shaft to rotate toward the second direction upon the electro-magnetic clutch is connecting to the wheel shaft.

Description

Double-sided paper feeder and paper feeding mechanism thereof

The present invention relates to a paper feeding mechanism of a transaction machine, and more particularly to a double-sided paper feeder capable of supporting a double-sided paper feeding function and a paper feeding mechanism thereof.

In order to support the complicated and complicated paperwork in the modern industrial and commercial society, the transaction machine has become one of the necessary equipments for modern offices, especially the multi-function machine that integrates fax, scanning and printing. Welcomed, in order to provide faster and more convenient paper handling function, the new generation of transaction machines are usually equipped with Automatic Document Feeder (ADF), which can automatically feed multiple sheets of paper into the transaction machine continuously, based on environmental protection and charging. For the purpose of using paper, a double-sided paper feeder that supports the double-sided processing function of paper (double-sided scanning, double-sided printing) has been developed.

A configuration of a known double-sided paper feeder is shown in Fig. 1, in which a double-sided paper feeder supporting a double-sided scanning function is taken as an example to explain its configuration. The document paper to be scanned is placed in a paper feed tray 10, and the document paper is conveyed to the scanning unit 12 via a paper feed path P1 by a plurality of paper feed roller groups 11, 11 and then via a paper discharge path P2. Moving to an output paper roller group 13, the document paper that has been scanned is pushed out by the paper discharge roller group 13; when the document paper is double-sided scanned, after the document paper that has been scanned by the first side is delivered to the paper output roller group 13, The paper output roller group 13 will be rotated in the reverse direction, and the document paper on which the first surface scanning is completed will be sent back to the paper feed path P1 via the paper return path P3, and the other side scanning operation can be performed.

The paper discharge roller set 13 of the conventional double-sided paper feeder is driven by a single drive group of the motor 14, so that when the paper is returned in the double-side scanning operation, the motor 14 needs to change the rotation direction to drive the original rotation toward the paper discharge direction. The paper discharge roller group 13 is rotated in the reverse direction. In order to prevent the reverse rotation of the motor 14 from affecting other components, causing paper pulling or misfeeding, etc., it is necessary to add a one-way bearing, a planetary gear or a solenoid valve, etc. Increase manufacturing and design costs. On the other hand, the change of the direction of rotation of the motor 14 also complicates the motor handling step and slows down the overall paper feed speed.

The present invention proposes a double-sided paper feed mechanism for solving the above problems of the conventional double-sided paper feeder.

An embodiment of the present invention comprises: a paper feed roller unit having a roller shaft, at least one active roller and a driven roller, the roller shaft driving the active roller and then rotating the driven roller for conveying paper; a damping transmission The unit is respectively connected with the power source and the roller shaft. The damping transmission unit has a damping transmission component coupled with the roller shaft by a coupling force, so that the power source drives the roller shaft to rotate in a first direction; and an electromagnetic clutch and the power source and the roller respectively The shaft is connected, the electromagnetic clutch is driven by the power source to rotate in a second direction, the second direction is opposite to the first direction, the electromagnetic clutch can be coupled or separated from the roller shaft, and the coupling force of the electromagnetic clutch and the roller shaft coupling is greater than the damping transmission component and the roller The coupling force of the shaft coupling can drive the roller shaft to rotate in the second direction when the electromagnetic clutch and the roller shaft are coupled.

In an embodiment of the invention, the damping transmission element is coupled to the roller shaft by interference or friction.

In an embodiment of the invention, the damping transmission element is a spring.

The present invention also includes an automatic paper feeder for solving the above problems of the conventional double-sided paper feeder.

Another aspect of the present invention provides a double-sided paper feeder for solving the above problems of the conventional double-sided paper feeder.

An embodiment of the automatic document feeder of the present invention comprises: a power source having a power component and a steering mechanism, the power component providing a single direction of rotational power, the steering mechanism being coupled to the power component, and being driven by the power component to generate a sum a rotating motion of the power component in the opposite direction of rotation; a paper feed roller unit having a roller shaft, at least one active roller and a driven roller, the roller shaft driving the active roller and then rotating the driven roller for transporting the paper; The transmission unit is respectively connected with the power component of the power source and the roller shaft. The damping transmission unit has a damping transmission component coupled by the coupling force and the roller shaft, so that the power component drives the roller shaft to rotate in a first direction; and an electromagnetic clutch respectively The electromagnetic clutch is driven by the steering mechanism to rotate in a second direction, the second direction is opposite to the first direction, the electromagnetic clutch can be coupled or separated from the roller shaft, and the electromagnetic clutch and the roller shaft are coupled. The coupling force is greater than the coupling of the damping transmission element to the roller shaft coupling , When the electromagnetic clutch can be driven and the roller shaft link roller shaft rotates in a second direction.

Through the double-sided paper feeding mechanism proposed by the invention, the double-sided paper feeding function can be realized without changing the rotation direction of the motor or the power source, and the motor or the power source can be prevented from being reversed due to the rotation direction of the motor or the power source. Rotation affects other components and simplifies the manipulation of the motor or power source.

The details of other functions and embodiments of the present invention will be described below in conjunction with the drawings.

Referring to FIG. 2, an embodiment of the double-sided paper feeding mechanism of the present invention comprises: a paper feed roller unit 20, a damping transmission unit 30 and an electromagnetic clutch 40, wherein the damping transmission unit 30 and the electromagnetic clutch 40 is connected to the power source of the transaction machine. One embodiment of the power source is generally composed of a motor and a transmission element (for example, a gear). In an embodiment of the invention, the power source provides a single direction of rotational power. The damper transmission unit 30 and the electromagnetic clutch 40 of the present invention are driven by a power source to perform a rotational motion in the opposite direction.

An embodiment of the paper feed roller unit 20 includes a roller shaft 21, at least one active roller 22, and a driven roller 23. The roller shaft 21 can drive the active roller 22 to rotate, and then the driven roller 22 rotates the driven roller 23 to utilize The drive roller 22 and the driven roller 23 carry the paper passing between them.

As shown in FIG. 3, an embodiment of the damper transmission unit 30 includes a first coupling member 31, a first power input member 32, and a damper transmission member 33, and the power of the first power input member 32 and the transaction machine. The source connection is driven by the power source and rotated in a first direction, and the first coupling member 31 and the roller shaft 21 are coupled (one of the embodiments is coupled together in a tightening engagement relationship), and the damping transmission member 33 and the first coupling member 31 are coupled. Coupling, the roller shaft 21 is interlocked by the coupling force between the damping transmission member 33 and the first coupling member 31, so that the rotational motion of the power source can drive the roller shaft 21 to rotate in a first direction. One embodiment of the first power input member 32 is a gear member having a tooth portion 321 in which the first power input member 32 and the first coupling member 31 are combined in a coaxial relationship; one embodiment of the damping transmission member 33 uses a spring, A portion of the damper transmission member 33 is fixedly coupled to the first power input member 32, and another portion of the damper transmission member 33 may be frictionally or interfered (see "Fig. 3") and the first coupling member 31. Coupled together.

As shown in FIG. 2, an embodiment of the electromagnetic clutch 40 includes a second coupling member 41 and a second power input member 42. The second coupling member 41 is coupled to the roller shaft 21 for interlocking the rotation of the roller shaft 21. The second power input member 42 is connected to the power source, and the second power input member 42 can be controlled by an electric signal to be combined or separated from the second coupling member 41. When the second power input member 42 and the second coupling member 41 are combined, The roller shaft 21 is drivable by a power source and rotates in a second direction opposite to the aforementioned first direction.

In an embodiment of the invention, when the roller shaft 21 rotates in the first direction, the active roller 22 is driven to move the paper toward the paper discharge direction of the transaction machine. Generally, the paper output is in a normal state, in other words, in a normal transaction. When the machine is not performing double-sided scanning or double-sided printing, the power source drives the damping transmission unit 30 to rotate, and the damping transmission component 33 drives the roller shaft 21 to rotate in the first direction by the coupling force, so that the normal paper discharge operation can be performed. At the same time, the second power input member 42 of the electromagnetic clutch 40 and the second coupling member 41 are separated (see "5A" and "5B"); when the transaction machine is to perform double-sided scanning or double When the surface is printed, the transaction machine activates the electromagnetic clutch 40 by using a signal to couple the second power input member 42 with the second coupling member 41. When the second power input member 42 and the second coupling member 41 are coupled, the roller shaft 21 can be Driven by the power source and rotated in the second direction, the coupling force due to the electromagnetic clutch 40 and the roller shaft 21 (ie, the combined force of the second power input member 42 and the second coupling member 41) is greater than the damping The coupling force of the movable unit 30 coupled to the roller shaft 21 (i.e., the coupling force for coupling the damping transmission member 33 and the first coupling member 31), and since the second direction is opposite to the aforementioned first direction, the damping transmission member 33 can be The torsional deformation or opening action of the spring causes a relative reverse rotation between the first coupling member 31 and the first power input member 32, so that the power source of the transaction machine can drive the roller shaft 21 through the electromagnetic clutch 40. The second direction rotates to produce a paper return action (see "6A" and "6B").

Please refer to FIG. 4, which is an embodiment of the automatic paper feeder of the present invention. The double-sided paper feeding mechanism and the power source are integrated to form an automatic paper feeder. An embodiment of the power source includes: a power component and a steering mechanism, the steering mechanism is coupled to the power component, and is driven by the power component to generate a rotational motion opposite to a rotational direction of the power component, wherein one embodiment of the power component is a motor 50, and the motor 50 is directed to a single In the direction of rotation, the power output end of the motor 50 is first connected to the damper transmission unit 30 for directly driving the damper transmission unit 30 to rotate in the first direction, and the power output end of the motor 50 is also connected to the electromagnetic clutch 40 via the steering mechanism for driving. The electromagnetic clutch 40 is rotated in the second direction. One embodiment of the steering mechanism is an idle gear 51 which is interposed between the power output end of the motor 50 and the electromagnetic clutch 40. The rotational power of the motor 50 is via the idle gear 51. Driving the electromagnetic clutch 40 causes the aforementioned second direction to be opposite to the first direction. In general, the output shaft of the motor 50 can also be connected to a gear reduction mechanism to increase the torque of the power output of the motor 50 through the gear reduction mechanism, and such a simple change application is common to those skilled in the art. In view of the above-described embodiments of the present invention, it can be easily implemented.

While the present invention has been described above by way of example, the present invention is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The scope of patent protection is subject to the terms of the claims attached to this specification.

P1‧‧‧ paper path
P2‧‧‧ paper path
P3‧‧‧Return path
10‧‧‧ input tray
11‧‧‧Feed roller set
11a‧‧‧Feed roller set
11b‧‧‧Feed roller set
11c‧‧‧Feed roller set
12‧‧‧ scan unit
13‧‧‧Output roller set
14‧‧‧Motor
20‧‧‧Feed Roller Unit
21‧‧‧Roller shaft
22‧‧‧Active scroll wheel
23‧‧‧ driven roller
30‧‧‧damper drive unit
31‧‧‧First joint parts
32‧‧‧First power input unit
321‧‧‧ teeth
33‧‧‧damper transmission components
40‧‧‧Electromagnetic clutch
41‧‧‧Second joint parts
42‧‧‧Second power input unit
50‧‧‧ motor
51‧‧‧Iner gear

[Fig. 1] is a schematic view showing the structure of a conventional double-sided paper feeder. [Fig. 2] Fig. 2 is a schematic structural view showing an embodiment of a double-sided paper feeding mechanism of the present invention. [Fig. 3] is a structural view showing an embodiment of the present invention, showing the configuration of the damper transmission unit. [Fig. 4] is a schematic view showing the configuration of an embodiment of the double-sided paper feeder of the present invention. [Fig. 5A] is a schematic view showing the operation of the present invention, showing the movement of the electromagnetic clutch and the roller shaft. [Fig. 5B] is a schematic view showing the rotation direction of the driving roller and the driven roller in Fig. 5A, showing the case where the paper is driven out in the normal state. [Fig. 6A] is another schematic view of the operation of the present invention, showing the movement of the electromagnetic clutch and the roller shaft when they are coupled. [Fig. 6B] is a schematic view showing the rotation direction of the driving roller and the driven roller in Fig. 6A, showing the case where the paper is driven back.

20‧‧‧Feed Roller Unit

21‧‧‧Roller shaft

22‧‧‧Active scroll wheel

23‧‧‧ driven roller

30‧‧‧damper drive unit

31‧‧‧First joint parts

32‧‧‧First power input unit

40‧‧‧Electromagnetic clutch

41‧‧‧Second joint parts

42‧‧‧Second power input unit

Claims (10)

The utility model relates to a double-sided paper feeding mechanism, which can be driven by a power source rotating in a single direction to perform double-sided paper feeding, comprising: a paper feeding roller unit, comprising a roller shaft, at least one driving roller and a driven roller, the roller shaft can be driven The driving roller is further coupled to rotate the driven roller for transporting the paper; a damping transmission unit is respectively connected to the power source and the roller shaft, and the damping transmission unit has a damping transmission component coupled to the roller shaft by a coupling force Having the power source drive the roller shaft to rotate in a first direction; and an electromagnetic clutch coupled to the power source and the roller shaft, the electromagnetic clutch being driven by the power source to rotate in a second direction, the second direction being The first direction is opposite, the electromagnetic clutch can be coupled or disconnected from the roller shaft, and the coupling force of the electromagnetic clutch and the roller shaft coupling is greater than the coupling force of the damping transmission element and the roller shaft coupling, and the electromagnetic clutch can be When the roller shaft is coupled, the roller shaft is driven to rotate in the second direction. The double-sided paper feeding mechanism of claim 1, wherein the damping transmission unit has a first coupling member and a first power input member, and the first power input member is coupled to the power source by the power The source drive rotates in the first direction, the first coupling member is coupled to the roller shaft, and the damping transmission member is coupled to the first coupling member, and is coupled by the coupling force between the damping transmission member and the first coupling member The roller shaft. The double-sided paper feeding mechanism of claim 2, wherein the damping transmission component is a spring, and a portion of the damping transmission component is fixedly coupled to the first power input component, and the damping transmission component is further A portion is coupled to the first coupling member. The double-sided paper feed mechanism of claim 3, wherein the damping transmission element is coupled to the first coupling member by friction or interference. The double-sided paper feed mechanism of claim 1, wherein the electromagnetic clutch comprises a second coupling member and a second power input member, the second coupling member being coupled to the roller shaft for interlocking the roller shaft Rotating, the second power input component is coupled to the power source, and the second power input component is controllable by an electrical signal of a transaction machine to be coupled or separated from the second coupling component, and the second power input component and the second power input component When the second coupling member is coupled, the roller shaft is drivable by the power source and rotates in the second direction. A double-sided paper feeder comprising: a power source having a power component and a steering mechanism, a power output end of the power component providing a single direction of rotational power, the steering mechanism being coupled to the power component, The component drive further generates a rotary motion opposite to the rotational direction of the power component; a paper feed roller unit has a roller shaft, at least one active roller and a driven roller, and the roller axle can drive the active roller to interlock the slave The roller is rotated for transporting the paper; a damping transmission unit is respectively connected to the power component and the roller shaft, the damping transmission unit has a damping transmission component coupled to the roller shaft by a coupling force, and the power component drives the roller Rotating the shaft in a first direction; and an electromagnetic clutch respectively coupled to the steering mechanism and the roller shaft, the electromagnetic clutch being driven by the steering mechanism to rotate in a second direction, the second direction being opposite to the first direction, the electromagnetic The clutch can be coupled or disconnected from the roller shaft, and the coupling force of the electromagnetic clutch and the roller shaft coupling Coupled to the force transmission element and the damping shaft coupled to the roller, the roller shaft can be driven when the electromagnetic clutch and coupled to the roller shaft rotates in the second direction. The double-sided sheet feeder of claim 6, wherein the damping transmission unit has a first coupling member and a first power input member, the first power input member being coupled to the power output end of the power member Rotating in the first direction by the power component, the first coupling component is coupled to the roller shaft, the damping transmission element is coupled to the first coupling component, between the damping transmission component and the first coupling component The coupling force interlocks the roller shaft. The double-sided paper feeder of claim 7, wherein the damping transmission component is a spring, a portion of the damping transmission component is fixedly coupled to the first power input component, and the other of the damping transmission component A portion is coupled to the first coupling member. The double-sided sheet feeder of claim 8, wherein the damping transmission member is coupled to the first coupling member by friction or interference. The double-sided sheet feeder of claim 6, wherein the electromagnetic clutch comprises a second coupling member and a second power input member, the second coupling member being coupled to the roller shaft for interlocking the roller shaft rotation The second power input component is coupled to the steering mechanism, and the second power input component is controllable by an electrical signal of a transaction machine to be coupled or separated from the second coupling component, and the second power input component and the first power input component When the two coupling members are coupled, the roller shaft is drivable by the steering mechanism and rotates in the second direction.