TWI431442B - And a paper sheet movement control device for the image forming apparatus - Google Patents

Description

Paper moving control device for image forming apparatus

The present invention relates to a transaction machine, and more particularly to a paper movement control device of an image forming apparatus.

When a document forming device such as a photocopier, scanner, or printer performs double-sided scanning or double-sided printing, when the secondary feeding occurs frequently, the leading end and the trailing end of the paper overlap at the same time, causing paper. The card is stuck at the paper exit, which results in inefficient work. In order to improve the above shortcomings, a manufacturer has developed a paper control device, which has the structure of the Republic of China No. M291574, which uses a link mechanism to drive the idler wheel at the paper exit to separate from the paper exit roller, so that the two ends of the paper can overlap. There is no jam at the paper exit, and the double-sided scanning or double-sided printing is successfully completed. Or, as disclosed in U.S. Patent No. 5,784,680, the use of a separating claw to switch the paper path, so that the image forming apparatus is formed on different channels when the paper is fed in the second time, so that the two ends of the paper are not The card is stuck due to overlap, and the double-sided scanning or double-sided printing operation is successfully completed.

However, the above-mentioned device has not only a large number of components, but also a complicated internal structure, which increases the production cost and increases the difficulty of maintenance or maintenance.

In view of the above, it is a primary object of the present invention to provide a paper sheet moving control device for an image forming apparatus which can avoid jamming and has a simple structure.

In order to achieve the above object, the paper sheet moving control device of the image forming apparatus provided by the present invention comprises a body, a first conveying wheel, a driven wheel and a second conveying wheel. a paper moving path is formed in the body; the paper moving path has a main path and a branch path; the main path has a starting end and an end respectively communicating with the outside of the body; the branch path is connected to the main path at one end Between the start end and the end, the other end is connected to the end of the main path. The first conveying wheel is disposed on the body and located between the starting end and the end of the main path. The passive wheel is disposed on the body and is located at the end of the main path. The second conveying wheel is disposed on the body at the end of the main path, and the tread surface thereof is in contact with the wheel surface of the driven wheel; the distance from the part of the wheel surface of the second conveying wheel to the center of the conveying wheel is less than The distance from the other tread to the center of the conveying wheel is such that when the second conveying wheel rotates, the partial tread has a predetermined distance from the tread of the driven wheel.

Thereby, the distance between the wheel surface of the driven wheel and a part of the wheel surface of the second conveying wheel can be used to cause the two ends of the paper to simultaneously overlap the end of the main path without being stuck.

In order that the present invention may be more clearly described, the preferred embodiments are illustrated in the accompanying drawings.

Referring to FIG. 1, an image forming apparatus 100 according to a first preferred embodiment of the present invention includes a scanning device 1 and a paper movement control device 2. The scanning device 1 is for scanning a paper content and forming an image electromagnetic material accordingly. The paper movement control device 2 is located on the scanning device 1 and includes a body 10, a paper take-up mechanism 20, a first transport wheel 30, a second transport wheel 40, a third transport wheel 50, and a control device. 60. A first paper position detecting device 70, a second paper position detecting device 75, and an attitude detecting device 80. among them:

The body 10 has a paper passage 11 inside. The paper path 11 constitutes a moving path of the paper in the body, and the paper path 11 has a main passage 111 constituting a main path and a branch passage 112 constituting a branch path. The main channel 111 has a starting end 111a and an end 111b. The starting end 111a communicates with the outside of the body 10 to form a paper feed port 12; the end 111b communicates with the outside of the body 10 to form a paper exit port 13. In addition, the scanning point S of the scanning device 1 is disposed on the main channel 111 to scan the paper passing through the main channel 111. One end of the branch passage 112 is connected between the starting end 111a and the end 111b of the main passage 111, and the other end is connected to the paper exit 13.

The paper take-up mechanism 20 is disposed at the paper feed port 12 of the body 10 and has a pre-pickup roller 21 and a pickup roller 22. The pre-pickup roller 21 is used to push the paper at the paper feed port 12 to the main passage 111 in sequence. The pickup roller 22 is used to feed the paper pushed by the pre-feeding roller 21 into the main passage 111.

The first conveying wheel 30 is disposed on the body 10, and is located between the starting end 111a of the main channel 111 and the scanning point S. In addition, the main channel 111 is opposite to the first conveying wheel 30. The side has a driven wheel 91 whose wheel surface is in contact with the wheel surface of the first conveying wheel 30, so that the paper in the main passage 111 is pushed toward the scanning point S and the paper exit port 13.

The third conveying wheel 50 is disposed on the body 10 while being located on the main passage 111 near the end 111b and between the two ends of the branch passage 112. In addition, the branching channel 112 has a passive wheel 92 on the opposite side of the third conveying wheel 50, and the wheel surface thereof is in contact with the wheel surface of the third conveying wheel 50 for the branching channel 112. The paper is pushed to the main channel 111. Furthermore, the main channel 111 has a driven wheel 93 on the opposite side of the third conveying wheel 50, and the wheel surface is connected to the wheel surface of the third conveying wheel 50 for the main channel 111. The paper is pushed toward the paper exit port 13.

Referring to FIG. 2 , a passive wheel 94 is disposed on the main channel 111 and adjacent to the paper exit 13 , and the second transport wheel 40 is disposed on the opposite side of the passive wheel 94 and the tread is The treads of the driven wheels 94 are connected to feed the paper from the paper exit 13 or the paper is fed from the paper exit 13 to the branch passage 112. The second conveying wheel 40 is different from the other conveying wheels 30, 50 described above in that the distance from the portion of the wheel surface 41 to the center of the conveying wheel is smaller than the distance from the other wheel surface 42 to the center of the conveying wheel, whereby the second conveying wheel 40 is rotated. The wheel surface 41 and the wheel surface of the driven wheel 94 have a predetermined spacing. In this embodiment, the tread 41 is a flat surface, but not limited thereto. The partial tread of the second conveying wheel may be designed as shown in FIG. 3 as long as the distance from the center of the conveying wheel is smaller than other treads. The convex transport wheel 45 or the concave transport wheel 46 shown in Fig. 4 is also a surface of other shapes.

In addition, the circumferential length of the second conveyor wheel 40 and the passive wheel 94 (ie, the circumference of the wheel surface 42) is greater than the contact point of the second conveyor wheel 40 and the driven wheel 94 to the third conveyor wheel. The length L of the branch passage 112 between the 50 and the contact of the driven wheel 92. The purpose of this design is that when the second transport wheel 40 rotates counterclockwise to push the paper from the paper exit 13 to the branch passage 112, the third transport wheel 50 and the driven wheel 92 can be in the second transport. The paper is bitten before the wheel 40 and the driven wheel 94 are spaced apart, and no paper is loosened.

The control device 60 is disposed on the body 10 and configured to control the rotation and steering of the rollers 21, 22 and the transport wheels 30, 40, 50.

The first paper position detecting device 70 is disposed on the body 10 and located at the paper feeding port 12. Referring to FIG. 5, in the embodiment, the first paper position detecting device 70 has a light emitter 71 and a light receiver 72. When paper is placed on the paper feed port 12, the light is emitted. The light from the light receiver 72 is sent to the light receiving device 72 to cause the light receiving device 72 to generate a signal to the control device 60 to inform the control device 60 that the paper feed port 12 has a paper to be processed, and accordingly The paper taking mechanism 20 pushes the paper to the paper path 11.

The second paper position detecting device 75 is disposed on the body 10 at a predetermined position on the main passage 111. Referring to FIG. 6, in the embodiment, the second paper position detecting device 75 has a light emitter 76 and a light receiver 77. When the paper reaches the predetermined position, the light emitter 76 is shielded from being emitted. The light of the light receiver 77 causes the light receiver 77 to generate a signal to the control device 60 to inform the control device 60 that the paper on the main channel 111 has reached the predetermined position, and the scanning device 1 is activated accordingly. Scanning function.

In addition, the mounting position of the second paper position detecting device 75 is preferably on the main passage 111 from the paper feeding port 12 before reaching the first conveying wheel 30, and is close to the first conveying wheel 30. In the position. The advantage is that the second paper position detecting device 75 can generate the signal to the control device 60 when the paper approaches the first conveying wheel 30, so that the control device 60 controls the first conveying wheel 30 to rotate clockwise by a predetermined time. Time to achieve the purpose of paper skew correction (de-skew). It is worth mentioning that, in design, the above two paper position detecting devices 70, 75 can also use a light sensor switch or other devices to achieve the same purpose.

The posture detecting device 80 is disposed on the body 10 and located at the end 111b of the main channel 111. Referring to FIG. 7, in the embodiment, the posture detecting device 80 has a disk 81 and a light emission. The device 82 has a light receiver 83. The disc 81 is disposed on the rotating shaft of the second conveying wheel 40, and the disc mask has a notch 811. The light emitters 82 and the light receivers 83 are respectively disposed on two sides of the disk 81. When the wheel surface 41 of the second conveyor wheel 40 faces the driven wheel 94, the notch 811 will be located at the light emitter 82. Between the light receiver 83 and the light receiver 83, the light receiver 83 can receive the light emitted by the light emitter 82, and generate a signal to inform the control device 60 that the second transport wheel 40 has the current posture of the wheel surface 41. The driven wheel 94 stops the second conveying wheel 40 in the current posture. Of course, in the design, a conventional detection device such as a reed switch or a micro switch can also be used to achieve the same purpose, and the details are not described herein.

Therefore, referring to FIG. 8 to FIG. 13 , a schematic diagram of the operation of each member when the paper is double-sided processed. FIG. 8 shows that after the first paper position detecting device 70 detects that the paper feeding port 12 has paper, the paper P is fed into the main channel 111 by the paper taking mechanism 20, and the second paper position detecting device 75 detects that the first end P1 of the paper P passes, and activates the scanning device 1 to scan the content of the paper P. 9 shows that after the second end P2 of the paper P leaves the second paper position detecting device 75 a certain distance, the second conveying wheel 40 rotates clockwise, and the third conveying wheel 50 rotates counterclockwise to the paper P is pushed to the paper exit port 13. 10 discloses that after the paper P leaves the third transport wheel 50 a certain distance, the second transport wheel 40 is rotated counterclockwise to feed the paper P from the paper exit 13 to the branch passage 112. FIG. 11 shows that after the paper P is sent to the branching channel 112, the control device 60 stops rotating the second conveying wheel 40 according to the signal of the attitude detecting device 80, and the wheel of the second conveying wheel 40 faces the passive wheel. 94. The predetermined distance is formed between the tread 41 of the second conveying wheel 40 and the wheel surface of the driven wheel 94. In addition, the third transporting wheel 50 continues to operate counterclockwise to feed the paper P into the main passage 111 for scanning. 12 shows that when the second end P2 of the paper P is fed out from the paper exit 13, the first end P1 still does not enter the paper moving path 11, and the two ends P1, P2 of the paper P overlap the paper exit. At 13 places, but because of the predetermined distance between the second conveying wheel 40 and the driven wheel 94, it is possible to prevent the paper P from being stuck. FIG. 13 discloses that after the double-sided scanning of the paper P is completed, the second conveying wheel 40 is operated clockwise to pass the paper P from the paper discharge port 13 Send it out.

It is worth mentioning that after the double-sided scanning is completed, the paper P can be sent to the branch channel 112 by the paper exit port 13 once, but the scanning is not performed, so that the sorting of the paper P after scanning can still be performed before scanning. the same.

In addition, when the paper P only needs to be processed on one side, as shown in FIG. 7 and FIG. 8 , after the scanning is completed, the paper P can be directly pushed to the paper exit 13 without feeding the paper P. The branch channel 112.

In addition to the above structure, referring to FIG. 14, a paper movement control device 3 according to a second preferred embodiment of the present invention is different from the above embodiment in that a main path 331 and a branch path 332 are disposed around the first transport wheel 310. A plurality of first passive wheels 341 are disposed on the body, and a portion thereof is located in the main path 331 or the branch path 332 and is in contact with the first transport wheel 310. In addition, the wheel surface of the first transport wheel 310 between the first driven wheels 341 is located in the main path 331 and the branch path 332, and part of the wheel surface of the second transport wheel 320 is also the same as the foregoing embodiment. There is a predetermined spacing from the tread of the second driven wheel 342. In this way, through the above design, the first transporting wheel 310 of the paper movement control device 3 can simultaneously send the paper in the main channel 331 to the paper exit port 330, and send the paper in the branch channel 332 to the main channel 331, Moreover, it does not interfere with the rotation of the second conveying wheel 320, thereby simplifying the complexity of the overall structure, reducing the cost, and making the maintenance and maintenance work easier.

The above description is only a few preferred embodiments of the present invention, and the equivalent structure and manufacturing method of the present invention and the scope of the patent application are changed. It should be included in the scope of the patent of the present invention.

100‧‧‧Image forming device

1‧‧‧ scanning device

S‧‧‧ scanning point

2‧‧‧Paper movement control device

10‧‧‧ body

11‧‧‧paper moving channel

111‧‧‧Main channel

111a‧‧‧Starting end

End of 111b‧‧‧

112‧‧‧ branch channel

12‧‧‧Inlet

13‧‧‧ paper exit

20‧‧ ‧ paper take-up mechanism

21‧‧‧Pre-fetching roller

22‧‧‧Picking roller

30‧‧‧First conveyor wheel

40‧‧‧Second transport wheel

41‧‧‧French

42‧‧‧90

45‧‧‧ convex transport wheel

46‧‧‧Concave conveyor wheel

50‧‧‧ Third conveyor wheel

60‧‧‧Control device

70‧‧‧First paper position detecting device

71‧‧‧Light emitter

72‧‧‧Light receiver

75‧‧‧Second paper position detecting device

76‧‧‧Light emitter

77‧‧‧Light receiver

80‧‧‧ attitude detection device

81‧‧‧ disc

811‧‧‧ gap

82‧‧‧Light emitter

83‧‧‧Light receiver

91~94‧‧‧French wheel

P‧‧‧paper

P1‧‧‧ first end

P2‧‧‧ second end

L‧‧‧ length

3‧‧‧Paper movement control device

310‧‧‧First conveyor wheel

320‧‧‧Second transport wheel

330‧‧‧ paper exit

331‧‧‧ main channel

332‧‧‧ branch channel

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view showing a first preferred embodiment of the present invention.

Figure 2 is a partial cross-sectional view showing the first preferred embodiment of the present invention.

Figure 3 reveals that part of the tread of the second conveyor wheel is convex.

Figure 4 reveals that a portion of the tread of the second conveyor wheel is concave.

Figure 5 is a side view of the first paper position detecting device.

Figure 6 is a side view of the second paper position detecting device.

Figure 7 is a perspective view of the attitude detecting device.

8 to 13 are schematic views showing the operation of the first preferred embodiment of the present invention.

Figure 14 is a cross-sectional view showing a second preferred embodiment of the present invention.

100. . . Image forming device

1. . . Scanning device

S. . . Scanning point

2. . . Paper movement control device

10. . . Body

11. . . Paper moving channel

111. . . main road

111a. . . Starting end

111b. . . End

112. . . Branch channel

12. . . Paper inlet

13. . . Paper exit

20. . . Paper take-up mechanism

twenty one. . . Pre-feeding roller

twenty two. . . Pick roller

30. . . First conveyor wheel

40. . . Second conveyor wheel

50. . . Third conveyor wheel

60. . . Control device

70. . . First paper position detecting device

75. . . Second paper position detecting device

80. . . Attitude detecting device

91~94. . . Passive wheel

Claims (10)

A paper movement control device for an image forming apparatus comprises: a body having a paper moving path formed therein; the paper moving path having a main path and a branch path; the main path having a start end and an end respectively communicating with the body Externally; one end of the branch path is connected between the start end and the end of the main path, and the other end is connected to the end of the main path; a first transport wheel is disposed on the body, and the main path is located on the main path Between the start end and the end, and the main path and the branch path surround the first transport wheel; a plurality of first passive wheels are disposed on the body, and a part of the part is located in the main path or the branch path The first conveying wheel is abutted; in addition, the wheel surface of the first conveying wheel between the first driving wheels is located in the main path and the branch path. The paper movement control device of the image forming apparatus of claim 1, further comprising a second conveying wheel disposed on the body at the end of the main path and having a wheel surface and a second wheel of the passive wheel The surface of the second conveyor wheel is less than the distance from the other wheel surface of the second conveyor wheel to the center of the second conveyor wheel, so that the second conveyor wheel rotates The portion of the tread has a predetermined spacing from the tread of the second driven wheel. The paper sheet moving control device of the image forming apparatus of claim 1, further comprising a paper take-up mechanism disposed on the body and located at the near end of the main path, and having a pre-pickup roller and a a paper take-up roller; the pre-feeding roller is used to sequentially send the paper at the starting end to the main path; the pick-up roller is used to The paper pushed by the pickup roller is fed into the main path. The paper movement control device of the image forming apparatus of claim 1 further includes a control device and an attitude detecting device; the control device is configured to respectively control rotation and steering of the conveying wheels; and the attitude detecting device is used for A signal is generated to the control device to inform the control device of the current attitude of the second delivery wheel. The paper movement control device of the image forming apparatus of claim 1, further comprising a control device and a paper position detecting device; the control device is configured to respectively control rotation and steering of the conveying wheels; and the paper position detecting device And a signal is generated to the control device to inform the control device that the paper in the paper moving path has reached a predetermined position. The paper movement control device of the image forming apparatus of claim 1, further comprising a control device and a paper position detecting device; the control device is configured to respectively control rotation and steering of the conveying wheels; and the paper position detecting device The signal is generated to the control device to inform the control device that the paper is located at the beginning of the main path. The paper sheet moving control device of the image forming apparatus according to claim 1, wherein the beginning end of the main path constitutes a paper feed port of the body; the end of the main path constitutes a paper exit of the body. The paper sheet moving control device of the image forming apparatus of claim 1, wherein the portion of the tread of the second conveying wheel is a plane. The paper sheet moving control device of the image forming apparatus of claim 1, wherein the portion of the tread of the second conveying wheel is a convex surface. The paper sheet moving control device of the image forming apparatus of claim 1, wherein the portion of the tread of the second conveying wheel is a concave surface.