CN1073959C

CN1073959C - Paper clipping preventer for paper feeder

Info

Publication number: CN1073959C
Application number: CN97123197A
Authority: CN
Inventors: 林仲炳
Original assignee: Mustek Systems Inc
Current assignee: Mustek Systems Inc
Priority date: 1997-11-24
Filing date: 1997-11-24
Publication date: 2001-10-31
Anticipated expiration: 2017-11-24
Also published as: CN1218000A

Abstract

The present invention relates to a paper jam preventing device of a paper feeding system. The paper jam preventing device of a paper feeding system is arranged outside the left boundary and the right boundary of paper along a paper feeding direction and is used for monitoring and controlling whether the paper feeding direction is correct, and when the direction is incorrect, a driving mechanism of a paper feeding mechanism is controlled. The paper jam preventing device of a paper feeding system comprises a group of contact plates which comprise contact plates, a detector group which comprises detectors, and a control mechanism, wherein each contact plate is tightly adjacent to the outside of the left boundary or the right boundary of the paper, and when the contact plates are propped and pressed by slantways fed paper, the contact plates displace towards the direction approaching to the boundaries; each detector is arranged near the contact plates for sensing the displacement of the contact plates; when the detector group is used for sensing the displacement of the contact plates, the driving mechanism of the paper feeding mechanism is controlled, the paper feeding mechanism normally feeds the paper, and paper jam is prevented.

Description

Feeding system prevent paper holder

The present invention relates to a kind of paper holder that prevents of feeding system, particularly a kind of image scanner prevents paper holder.

The field of application of feeding system is very extensive, for example scanning device, photoprinter, chopping machine, facsimile apparatus etc.Feeding system is can be with parts old or because misoperation causes holding paper, in traditional feeding system without any the measure that prevents holding paper, when holding paper, also fail to provide the design of any user's of helping trouble-shooting, for the operator who is familiar with machine, generally to open the cap of machine voluntarily, the application of force is pulled out the file of clamping, and is bigger for machine members; And for the operator who does not know machine well; Even because can not get rid of holding paper and must seek help from other people, very inconvenient in the use.

In order to address the above problem, disclosed a kind of " scanner unit of tool drawing drawer " in the Taiwan patent application 85207086 (notification number 291219), when the machine holding paper, this scanner unit provides the drawing drawer mode of choosing to realize getting rid of fast the purpose of holding paper.Figure 1A and Figure 1B express the exploded perspective view of this prior-art devices, and wherein it comprises: body 2, be contained in motor in the body 2 and train of reduction gears 1, drawing drawer 3, catadioptre 4.Body 2 front panels have drawing drawer withdraw from button 5, file retreats button 6, file forward key 7, LED light 8.Drawing drawer 3 is installed in the chute 10 in the body 2, and can be removed, this drawing drawer 3 comprises: file sends into mouthfuls 31, synchronous belt 32, engaging gear 33, drawing drawer side flange 34, file take out and cover 35, drawing drawer fixed orifice 36, roller set 37, scan form 38, drawing drawer stationary links 39, push rod 310, chute 311, check spring 312 etc.

When the file holding paper in the scan channel, but user's mat press and withdraw from button 5, the elastic force that utilizes spring 312 with drawing drawer 3 slight ejections after, drawing drawer 3 is skidded off by chute 10 take off again, open file then to take out and cover 35, the holding paper file is taken out smoothly.

In addition, disclosed a kind of the extraction-type scanner structure of host computer " in be built in " in the Taiwan patent application 84213349 (notification number 282196), when holding paper, this scanning device provides the function of handling holding paper equally.Fig. 2 A and Fig. 2 B represent the exploded perspective view of this prior art, Fig. 2 A space orientation structure 100 of scanning device for this reason wherein, comprise: main casing 46 and base plate 41, scanner shell 42, elasticity blocking element 43, spring 44, upper cover plate 45, first permanent seat 47, second permanent seat 48, hooking sheet 49, start portion 410, roller 411, fin 412, limiting groove 413, block piece 414, panel 424, be located at the live roller 421 in the scanner shell 42, be located at the track 415 on main casing 46 inner surfaces, each track 415 respectively has a groove 416, also has two openings 423 on the upper cover plate 45.

When holding paper, the user can apply pressure to scanner shell 42, scanner shell 42 is moved to the direction of clip element 43, because the element characteristic of clip element 43, hooking sheet 49 is discharged by clip element 43, and scanner shell 42 is by the protruding surface that is exposed to host computer housing (not shown) toward extrapolating as a result.The portion that starts 410 that therefore user can raise upper cover plate 45 takes out nipped file.

Though above-mentioned two kinds of prior aries can be pushed up the sharp holding paper of getting rid of, from another kind of angle, because of can not just detecting in the beginning that bad paper feeding appears in file holding paper can take place, and eliminating, bigger for component wear like this, and said structure is also very complicated.

The object of the present invention is to provide a kind of simply constructed feeding system to prevent paper holder, it can be applicable to be not limited to scanner unit in any machine with feeding system, can prevent holding paper.

The object of the present invention is achieved like this, a kind of paper holder that prevents of feeding system promptly is provided, be located at along the outside of the paper left and right margins of normal paper feed direction delimitation, whether in the right direction in order to monitor the control paper feed, it has: a winding touch panel, comprise at least one contact plate, and this each contact plate is in close proximity to the outside of left side limit or the right limit of paper respectively, and flexibly propped up and be held on the frame, be subjected to crooked advance during the paper roof pressure can be towards near the displacement of margin direction; And detector set, comprising at least one detector, each detector is located near this contact plate, in order to this contact plate displacement of sensing.

The advantage of apparatus of the present invention is that it prevents that paper holder from can promptly be taken precautions against at the beginning of the bad paper feeding of file, and its up-down roller no longer drives file advances, thereby holding paper can not take place, and this apparatus structure is simple, and operation is convenient.

Below in conjunction with accompanying drawing, embodiments of the invention are described, wherein:

Figure 1A and Figure 1B have the three-dimensional exploded view of getting rid of holding paper functionality scan device for prior art;

Fig. 2 A and Fig. 2 B are the three-dimensional exploded view that another kind of prior art has the scanner unit of getting rid of the holding paper function;

Fig. 3 A prevents the paper holder schematic top view for the first embodiment of the invention feeding system;

Fig. 3 B is for preventing the part block diagram of paper holder among Fig. 3 A;

Fig. 4 A is the partial enlarged drawing of Fig. 3 A, and normal paper feed direction is shown;

Fig. 4 B is the partial enlarged drawing that is similar to Fig. 4 A, and crooked paper feed direction is shown;

Fig. 5 A is that the feeding system of second embodiment of the invention prevents the paper holder schematic top view;

Fig. 5 B prevents the part block diagram of paper holder for feeding system of the present invention among Fig. 5 A.

Followingly prevent the structure of paper holder with reference to description of drawings embodiment of the invention feeding system, Fig. 3 A is that the feeding system of first embodiment of the invention prevents the paper holder schematic top view.Fig. 3 B prevents the part block diagram of paper holder for feeding system among Fig. 3 A.

The feeding system of first embodiment of the invention prevents paper holder, be located at the outside of delimiting paper left and right margins L2, L1 along normal paper feed direction, whether correct in order to monitor control paper feed direction, the driver train 21,22 of control paper feed mechanism (roller bearing) R1, R2, R3, R4 etc. when the paper feed poor direction is true makes this paper feed mechanism R1, R2, R3, R4 change normal paper feed operation into and prevents holding paper.The feeding system of this first embodiment prevents that paper holder mainly has: left and

right contact plate

61,51; Detector set comprises most for example light interrupter-type detectors 65,55; And control mechanism 23, whether and rotation direction the rotation of the driver train 21,22 of may command paper feed mechanism R1, R2, R3, R4 etc.

Each

contact plate

61,51 is in close proximity to the outside of left side limit L2 or the right limit L1 of paper respectively, propped up by elasticity such as

support member

52,53 and be held in (Fig. 3 A, 3B, 4A, 4B) on the frame, and appropriate location by each

contact plate

61,51, extend an extension 64,54 respectively towards the outside corresponding to each detector 65,55, its effect back also will be narrated.

Fig. 4 A is the partial enlarged drawing of Fig. 3 A, and normal paper feed direction is shown.Fig. 4 B is the partial enlarged drawing that is similar to Fig. 4 A, and the crooked situation of paper feed direction is shown.Under the normal situation of paper feed direction shown in Fig. 4 A, the edge of paper P does not touch each

contact plate

61,51, so

support member

52,53 is not subjected to bias voltage, each

contact plate

61,51 is kept original position, and each detector 65,55 does not detect the signal that extension 64,54 inserts yet.On the other hand, under the crooked situation of paper feed direction shown in Fig. 4 B, the edge portion meeting roof pressure of paper P is to contact

plate

61 or 51, so

support member

52,53 is subjected to bias voltage,

contact plate

61 or 51 is by original position deviation, and its extension 64 or 54 inserts in each detector 65 or 55, with its optical signal blocking, each detector 65 or 55 promptly detects the situation that contact plate has displacement (the paper feed direction is crooked), and sends signalisation control mechanism 23.Control mechanism 23 is promptly controlled the driver train 21,22 of paper feed mechanism (roller bearing) R1, R2, R3, R4, makes this paper feed mechanism (roller bearing) R1, R2, R3, R4 stops operating or change rotation direction, just can prevent holding paper.

Fig. 5 A is that the feeding system of second embodiment of the invention prevents the paper holder schematic top view.Fig. 5 B illustrates the part block diagram that feeding system among Fig. 5 A prevents paper holder.

The feeding system of second embodiment prevents that the paper holder and the aforementioned first embodiment key distinction from being that the number of detectors that adopted is different.Specifically, in contact plate 71 outsides,, respectively be provided with a detector 77,75 along paper feed direction upstream side and downstream.Similarly, in contact plate 81 outsides,, respectively be provided with a detector 87,85 along paper feed direction upstream side and downstream.No matter the detector 87,85 in detector on right side 77,75 or left side detects contact plate 71 or 81 displacement (being that the paper feed direction is crooked) is arranged, all can send signalisation control mechanism 27.Control mechanism 27 is promptly controlled the driver train 26 of paper feed mechanism (roller bearing) R1, R3, makes this paper feed mechanism (roller bearing) R1, R3 stops operating or changes rotation direction (as counter-rotating), to reach the purpose that prevents holding paper.According to the paper holder that prevents of the second embodiment feeding system, because the number of detectors increase, so its detection sensitivity is higher than first embodiment.

The preferred embodiment of above-mentioned feeding system is used for image scanner, but the feeding system that is used for other machines is also suitable.Having, in aforementioned each embodiment explanation, about detector aspect, is that example is illustrated though enumerate light interrupter-type detector again, and above-mentioned detector also can adopt micro-switch formula detector or reflecting type detector.In fact, concrete embodiment or embodiment are proposed only in order to be easy to illustrate technology contents of the present invention in detailed description of the invention, and be not with narrow sense of the present invention be limited to this embodiment, do not exceeding the present invention's spirit and following claims scope, can make various changes.

Claims

A feeding system prevent paper holder, it is characterized in that be located at the outside of the paper left and right margins of delimiting along normal paper feed direction, whether in the right direction in order to monitor the control paper feed, it has:

One winding touch panel comprises at least one contact plate, and described each contact plate is in close proximity to the outside of left side limit or the right limit of paper respectively, and is flexibly propped up and be held on the frame, be subjected to crooked advance during the paper roof pressure can be towards near the displacement of margin direction; And

Detector set comprises at least one detector, and described each detector is located near the described contact plate, in order to the described contact plate displacement of sensing.
2. feeding system as claimed in claim 1 prevents paper holder, it is characterized in that, it also comprises a control mechanism, the driver train of control paper feed mechanism when displacement being arranged in order to predict arbitrary described contact plate in described detector set, make described paper feed mechanism change into normal paper feed operation, prevent holding paper.
3. feeding system as claimed in claim 2 prevents paper holder, it is characterized in that, the driver train of described control mechanism control paper feed mechanism when described detector set predicts arbitrary described contact plate displacement is arranged makes described paper feed mechanism stop operating or reverse.
4. feeding system as claimed in claim 1 prevents paper holder, it is characterized in that, a described winding touch panel is made of two contact plates of being located at the margin outside, both sides respectively.
5. prevent paper holder as claim 1 or 4 described feeding systems, it is characterized in that,, near each described contact plate, respectively be provided with a detector along paper feed direction upstream side and downstream.
6. prevent paper holder as claim 1 or 4 described feeding systems, it is characterized in that, near described each contact plate, only be provided with a detector.
7. feeding system as claimed in claim 1 prevents paper holder, it is characterized in that, described detector is a smooth interrupter-type detector.
8. feeding system as claimed in claim 1 prevents paper holder, it is characterized in that, described detector is a micro-switch formula detector.
9. feeding system as claimed in claim 1 prevents paper holder, it is characterized in that, described detector is a reflecting type detector.