CN203909471U

CN203909471U - Image forming device

Info

Publication number: CN203909471U
Application number: CN201420084108.9U
Authority: CN
Inventors: 木下博宣; 下见雅也; 松尾和德
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 2013-03-07
Filing date: 2014-02-26
Publication date: 2014-10-29
Anticipated expiration: 2024-02-26
Also published as: US20140255071A1; JP2014174256A; JP5325350B1

Abstract

The utility model discloses an image forming device which can keep the constant detection precision of a sensor used for detecting the condition that paper passes through a paper feeding path. According to the image forming device, an image is formed on one side of the paper after the image is formed on the other side of the paper by an image forming unit. A single-sided paper feeding path conveys the paper accommodated in a paper feed tray to the image forming unit, and a double-sided paper feeding path turns over the paper where the image is formed on one side and converges the paper to the single-sided paper feeding path. The single-sided paper feeding path comprises a second section; and a treading track roughly identical to a treading track of the paper in a first section which is formed in the double-sided paper feeding path and extends to the upstream side of the paper conveying direction by taking a positioning sensor configured near the convergence position of the single-sided paper feeding path and the double-sided paper feeding path as an endpoint is described by the paper in the second section.

Description

Image processing system

Technical field

The utility model relates to the image processing system that possesses printed on both sides function.

Background technology

In recent years, the image processing systems such as digit apparatus (MFP:Multifunction Printer, multi-function printer) that possess the functions such as printer, duplicating machine, fax are popularized.Image processing system possesses whole function that issued transaction needs substantially, small-sized and do not take up an area, also superior on cost, therefore, and from now on can be more and more universal.

In addition, in image processing system, have and possess the image processing system (for example,, with reference to patent documentation 1) that forms the printed on both sides function of image form image on a face after on another face.When printed on both sides, in image formation unit, on a face, form after image, paper is sent into two-sided paper feed path and make, after its upset, again to send into image formation unit, thus, on another side, also form image.

Prior art document

Patent documentation 1: TOHKEMY 2001-63892 communique

Accompanying image forms the miniaturization of device and the high speed of the printing in image processing system, it is contemplated that on paper feed path the constantly situation of conveyance of sheets.For example, can enumerate the situation of carrying out following processing: on two-sided paper feed path, carry a face formed image paper during, other paper are being carried out on the paper feed path of image formation, carries and form image (sometimes also referred to as intersecting (interleave) processing).The in the situation that of conveyance of sheets so constantly, it is contemplated that distance between the paper of carrying (that is, the distance between the rear end of paper and the front end of follow-up paper in advance on paper feed path.Hereinafter referred to as paper spacing) very short.

In this case, for example, if pass through the sensor of this situation for detection of paper (on paper feed path, top sensor) accuracy of detection in produces deviation, the paper spacing that image processing system identifies is different with actual paper spacing, thereby easily in the follow-up paperboard (obstruction) that occurs on the paper feed path of the sensor.Therefore, for detection of paper, on paper feed path, passing through, in the sensor of this situation, accuracy of detection to be remained necessarily of crucial importance.

Utility model content

The utility model In view of the foregoing completes, and provides and the accuracy of detection for detection of paper sensor by this situation on paper feed path can be remained to certain image processing system.

The image processing system of the utility model one form is configured to, by image formation unit, on a face of recording medium, formed after image, on another face of described recording medium, form image, this image processing system possesses: the first paper feed path, and it is transported to described image formation unit by the described recording medium that is accommodated in sheet feed stacker, the second paper feed path, it makes described recording medium to described the first interflow, paper feed path make to have formed the described recording medium upset of image on a face after, alignment sensor, it is disposed near the position, interflow in described the first paper feed path and described the second paper feed path, and the front position of carried described recording medium is revised, and top sensor, it is disposed at and from described alignment sensor, to described recording medium transporting direction downstream, leaves the position of predetermined distance, for determining the recording medium spacing of the described recording medium of carrying, described the second paper feed path comprises: the first interval, and it is for carrying the described recording medium that has formed image on a face to general horizontal direction, and between Second Region, it is for being transported to described recording medium the position of described alignment sensor from described the first extremity of an interval position, described the first paper feed path comprises: the 3rd interval, it is for being transported to another end points by described recording medium from an end points, this end points is that described the first interval is extended and the crossing position in the virtual line that obtains and described the first paper feed path virtually to described recording medium transporting direction upstream side, this another end points is the position the distance of leaving from described alignment sensor to described recording medium transporting direction upstream side between described the first extremity of an interval position and a described end points, and the 4th interval, it is for being transported in general horizontal direction described recording medium the position of described top sensor from described another end points in described the 3rd interval, and the run trace between described Second Region is identical with the run trace in described the 3rd interval.

According to the utility model, the accuracy of detection of the sensor passing through on paper feed path for detection of paper can be remained necessarily.

Accompanying drawing explanation

Fig. 1 means the section of structure of the image processing system of the utility model one embodiment.

Fig. 2 means the figure of structure of the printing equipment of the utility model one embodiment.

Fig. 3 A and Fig. 3 B mean respectively the enlarged drawing of image processing system of the utility model one embodiment and the figure of the run trace of paper.

Fig. 4 A and Fig. 4 B mean the figure of the situation of the paper that is transported to top sensor.

Embodiment

Below, with reference to accompanying drawing, embodiment of the present utility model is at length described.

[structure of image processing system]

Fig. 1 means the sectional view of the structure of image processing system (MFP) 100.

In image processing system 100, taking-up is accommodated in carton 10 (sheet feed stacker) or MPT (Multi Purpose Tray, multi-functional carton) recording medium in 20 (manual paper feeding plates) is (following, be made as " paper ") and deliver to printing equipment 30, in printing equipment 30, view data is printed on paper, the paper that has printed view data is discharged to ejection port 40.

[structure of printing equipment 30]

Fig. 2 is the schematic diagram of the printing equipment 30 in Fig. 1.Printing equipment 30 possesses on a face of paper (recording medium) and forms after image, forms the printed on both sides function of image on the another side of paper.

Printing equipment 30 shown in Fig. 2 has paper on single path 31 (solid line), two-sided paper feed path 32 (dotted line) and MPT paper feed path 33 (single-point line), as the paper feed path of conveyance of sheets.

Paper on single path 31 is when being printed on one side or the transport path of conveyance of sheets during printed on both sides, is the transport path that carries out paper supply, image formation, photographic fixing, ADF.

Two-sided paper feed path 32 is paper feed paths of conveyance of sheets when printed on both sides.Two-sided paper feed path 32 comprises: for making the paper feed path 32a of paper turning (turning back); For making the paper after upset again converge to the paper feed path 32b in paper on single path 31; And for send into the paper feed path 32c of paper to paper feed path 32b from paper on single path 31.

MPT paper feed path 33 is the conveying roads from MPT20 to paper on single path 31 conveyance of sheets.

Whether top sensor 301 has the detection arm rotating centered by axle, and this detection arm is arranged to interior outstanding to paper on single path 31, and detect and in top sensor 301, have paper to pass through (paper whether with detect arm butt).Particularly, top sensor 301 when in top sensor 301, do not have paper by the situation that generate OFF signal, when in top sensor 301, have paper by the situation that generate ON signal.

Image formation unit 302 comprises transfer roll 302a, OPC (Organic Photo Conductor, organic photoconductor) 302b, developer roll 302c and donor rollers 302d.Image formation unit 302, by being transferred to the corresponding toner image of view data the paper transporting, forms image thus on paper.

Fixation unit 303 has pressure roller 303a and warm-up mill 303b.Fixation unit 303 makes to be transferred in the toner image on paper.

Whether grate paper-arranaging sensor 304 detects has paper to pass through on grate paper-arranaging sensor 304.Particularly, same with top sensor 301, grate paper-arranaging sensor 304 when on grate paper-arranaging sensor 304, do not have paper by the situation that generate OFF signal, when on grate paper-arranaging sensor 304, have paper by the situation that generate ON signal.

Exit roller 305 is follow-up to be configured in fixation unit 303, and the paper transporting is carried to the direction of changer lever 306.

The conveying destination of 306 pairs of paper that transported by exit roller 305 of changer lever switches to any one in paper on single path 31 and two-sided paper feed path 32.When changer lever 306 is under the state of position 306a, paper is transported to the direction of deliverying unit 307 on the 32c of paper feed path.On the other hand, when changer lever 306 is under the state of position 306b, paper is transported to the direction of deliverying unit 307 on paper on single path 31.

Deliverying unit 307 possesses close ejection port 40 and roller 307a, 307b, the 307c of configuration.By roller 307a and roller 307b, formed the distributing roller that the paper of carrying is discharged to ejection port 40 on paper on single path 31.In addition, by roller 307b and roller 307c, formed the twist rollers (roller of turning back) of the throughput direction upset that makes (paper feed path 32a) upper paper of carrying in two-sided paper feed path 32.

Below, roller 307a, the 307b by the paper that makes on paper on single path 31 to carry during to ejection port 40 ADF and the rotation of 307c are processed and are called " forward processings ", the processing of the rotation contrary with " forward processings " are called to " processing of reversing ".That is, in forward is processed, utilize roller 307a and roller 307b that the paper on paper on single path 31 is carried to the direction that is expelled to ejection port 40, utilize roller 307b and roller 307c that the paper on the 32a of paper feed path is carried to paper feed path 32b direction.On the other hand, in reversion is processed, utilize roller 307b and roller 307c that the paper on the 32a of paper feed path is carried to the direction that is expelled to ejection port 40.

That is,, when printed on both sides, first deliverying unit 307 is processed by the reversion of twist rollers (roller 307b, 307c), and the paper of carrying on the 32c of paper feed path is introduced to paper feed path 32a.Then, deliverying unit 307 is processed by the forward of twist rollers, and the paper on the 32a of paper feed path is carried to paper feed path 32b direction.

ADU (Automatic Duplex Unit, automatic double-sided print unit) conveying roller 308 and ADU conveying roller 309 will be transported to paper 31 directions conveyings to paper on single path of paper feed path 32b from deliverying unit 307.From paper feed path 32b, converge to the paper pros and cons upset in paper on single path 31, therefore, in printing equipment 30, can carry out printed on both sides.Whether ADU sensor 310 detects has paper to pass through on ADU sensor 310, thereby detects the situation that paper is carried on the 32b of paper feed path.

Pick-up roller 311 and separate roller 311b take out paper one by one from carton 10, and paper-feed roll 312 is sent the paper of taking-up to paper on single path 31.Whether pickoff sensor 313 detects has paper to pass through on pickoff sensor 313, thereby detects the situation of taking out paper from carton 10.

MPT pick-up roller 314a and MPT conveying roller 314b take out paper one by one from MPT20, and the paper of taking-up is sent to paper on single path 31 from MPT paper feed path 33.

Whether alignment sensor 315 detects has paper to pass through on alignment sensor 315.Registration roller, is revised the front position of the paper being transferred based on by the detected position of alignment sensor 315 316.Thus, make the image of printing and the paper synchronous of supply.

[structure by paper sheet delivery to the paper feed path of top sensor 301]

Fig. 3 A be will be contained in the paper sheet delivery of carton 10 to the paper on single path 31 of image formation unit 302, and make to have formed on a face make after the paper turning of image its to paper on single path the enlarged drawing of (the part A shown in Fig. 1 and Fig. 2) in the two-sided paper feed paths 32 at 31 interflow.Fig. 3 B is illustrated in the run trace of the paper being transferred in Fig. 3 A.

Paper on single path 31 shown in Fig. 3 A and Fig. 3 B forms, comprise that paper is depicted and two-sided paper feed path 32 in the interval (the 3rd interval) of take the roughly the same run trace of the run trace of the paper in the regulation interval (between Second Region) that alignment sensor 315 is an end points.In addition, alignment sensor 315 is disposed near the position, interflow in paper on single path 31 and two-sided paper feed path 32.

Particularly, as shown in Figure 3 B, the interval between two-sided paper feed path 32Zhong place B and place C is made as between Second Region.In addition, as shown in Figure 3 B, the interval between paper on single path 31Zhong place B ' and place C ' is made as to the 3rd interval.That is, the shape (run trace of paper) between the shape in the 3rd interval (run trace of paper) and Second Region is roughly the same.

In addition, place B (end points between Second Region) represents the allocation position of alignment sensor 315.In addition, in the example of Fig. 3 A and Fig. 3 B, place B be two-sided paper feed path 32 with the position at 31 interflow, paper on single path near and paper feed path become the almost position of straight line.That is to say, between Second Region, be in two-sided paper feed path 32, near the position, interflow with paper on single path 31 and two-sided paper feed path 32 (in Fig. 3 A and Fig. 3 B, being the allocation position of alignment sensor 315) be an end points and the interval of extending to sheet transport direction upstream side.In addition, place B ' is position corresponding to the place B with between Second Region in the 3rd interval, in the example of Fig. 3 A and Fig. 3 B, is that paper feed path becomes the almost position of straight line.

In addition, in the example shown in Fig. 3 A or Fig. 3 B, two-sided paper feed path 32 comprises: the first interval that the paper that has formed image on a face is carried to general horizontal direction; And follow-up in the 1st interval, towards alignment sensor 315, to rise, interflow is between the Second Region in paper on single path 31.In this case, place C (that is, another end points between above-mentioned Second Region) be for example in two-sided paper feed path 32, after alignment sensor 315 rises interflow to the starting position (rising starting position) between the Second Region in paper on single path 31.In addition, place C ' is position corresponding to the place C with between Second Region in the 3rd interval.

The run trace of the paper in the two-sided paper feed path 32 when the track 32 ' (dotted line) shown in Fig. 3 A and Fig. 3 B represents the place B in two-sided paper feed path 32 and the run trace (solid line) of the paper between the C of place are overlapped with the place B ' in paper on single path 31 and the run trace (dotted line) of the paper between the C ' of place.As shown in Figure 3 B, between place B ' and place C ', track 32 ' (corresponding with the place B in two-sided paper feed path 32 and the run trace (between Second Region) of the paper between the C of place) is roughly consistent with the run trace (the 3rd interval) of the paper in paper on single path 31.

That is, in Fig. 3 A and Fig. 3 B, the paper of carrying on paper on single path 31 and the paper carried on two-sided paper feed path 32 by the paper feed path of same shape, describe identical run trace and be transferred.Therefore on the paper of, carrying and the paper of carrying, produce identical bending on the 32a of paper feed path on paper on single path 31.

As mentioned above, in Fig. 3 A and Fig. 3 B, follow-up between Second Region and the paper feed path in the 3rd interval be roughly straight line.Therefore, there is the identical crooked paper producing between Second Region or in the 3rd interval, also keep identical be transported to agley follow-up in the top sensor 301 of alignment sensor 315.Therefore,, in the paper of carrying to top sensor 301, even in the situation that carry on which paper feed path in paper on single path 31 or two-sided paper feed path 32, also produce identical bending.Thus, paper and the position of top sensor 301 butts do not rely on the paper feed path that paper is transferred and are almost identical position.

For example, Fig. 4 means on the paper on single path 31 after alignment sensor 315 figure of the situation of the paper carried and top sensor 301 butts.Different with the bending of paper in Fig. 4 B at Fig. 4 A in this hypothesis.Therefore, in the paper shown in the paper shown in Fig. 4 A and Fig. 4 B, different from the position of top sensor 301 butts.Therefore, for example, in the situation that the paper shown in the paper shown in Fig. 4 A and Fig. 4 B mixes, to top sensor 301, carry, in top sensor 301, detect and in top sensor 301, whether have the moment that paper passes through to produce deviation.That is, the accuracy of detection in top sensor 301 produces deviation.

With respect to this, in the present embodiment, make the run trace of paper on single path 31 and paper in curve paper feed path in two-sided paper feed path 32, before being delivered to top sensor 301 roughly consistent.By doing like this, from any paper feed path, also to top sensor 301, carry the paper for example, with identical bending (, any one in Fig. 4 A or Fig. 4 B).Thus, the position of paper and top sensor 301 butts does not rely on the paper feed path that paper is transferred and is roughly the same position, in top sensor 301, detects the moment that whether has paper to pass through to remain necessarily in top sensor 301.

Therefore, according to present embodiment, in image processing system 100, can suppress the deviation of the accuracy of detection of the top sensor 301 by this situation for detection of paper, and remain certain.

Thus, image processing system 100 can be determined the paper spacing of the paper passing through in top sensor 301 exactly.For example, even in the situation that the paper spacing being assumed in image processing system 100 is very short, by determining paper spacing accurately, thereby can suppress the generation of the paperboard (obstruction) that the mistake identification due to paper spacing causes.In addition, the processing that image processing system 100 can precision carries out such as using the testing result of top sensor 301 or other sensors well (image form and occlusion detection etc.).

In addition,, in above-mentioned embodiment, illustrated and used paper as the situation of recording medium, but be not limited to paper, so long as can carry out the recording medium of printed on both sides.

The utility model is useful for image forming device that can printed on both sides.

Claims

1. image processing system, it is formed after image on a face of recording medium by image formation unit, on another face of described recording medium, forms image, it is characterized in that, and this image processing system possesses:

The first paper feed path, it is transported to described image formation unit by the described recording medium that is accommodated in sheet feed stacker;

The second paper feed path, it makes described recording medium to described the first interflow, paper feed path make to have formed the described recording medium upset of image on a face after;

Alignment sensor, it is disposed near the position, interflow in described the first paper feed path and described the second paper feed path, and the front position of carried described recording medium is revised; And

Top sensor, it is disposed at and from described alignment sensor, to described recording medium transporting direction downstream, leaves the position of predetermined distance, for determining the recording medium spacing of the described recording medium of carrying,

Described the second paper feed path comprises:

The first interval, it is for carrying the described recording medium that has formed image on a face to general horizontal direction; And

Between Second Region, it is for described recording medium is transported to the position of described alignment sensor from described the first extremity of an interval position,

Described the first paper feed path comprises:

The 3rd interval, it is for being transported to another end points by described recording medium from an end points, this end points is that described the first interval is extended and the crossing position in the virtual line that obtains and described the first paper feed path virtually to described recording medium transporting direction upstream side, and this another end points is position from described alignment sensor to described recording medium transporting direction upstream side that leave the distance between described the first extremity of an interval position and a described end points from; And

The 4th interval, it is for described recording medium is transported to the position of described top sensor from described another end points in described the 3rd interval in general horizontal direction,

Run trace between described Second Region is identical with the run trace in described the 3rd interval.

2. image processing system, it is formed after image on a face of recording medium by image formation unit, on another face of described recording medium, forms image, it is characterized in that, and this image processing system possesses:

The second paper feed path, it makes described recording medium to described the first interflow, paper feed path make to have formed the described recording medium upset of image on a face after; And

Top sensor, it is disposed at from the position, interflow in described the first paper feed path and described the second paper feed path and to described recording medium transporting direction downstream, leaves the position of predetermined distance, for determining the recording medium spacing of the described recording medium of carrying,

Described the second paper feed path comprises:

Between Second Region, it is for described recording medium is transported to position, described interflow from described the first extremity of an interval position,

Described the first paper feed path comprises:

The 3rd interval, it is for being transported to another end points by described recording medium from an end points, this end points is that described the first interval is extended and the crossing position in the virtual line that obtains and described the first paper feed path virtually to described recording medium transporting direction upstream side, and this another end points is position from position, described interflow to described recording medium transporting direction upstream side that leave the distance between described the first extremity of an interval position and a described end points from; And

3. image processing system, it is formed after image on a face of recording medium by image formation unit, on another face of described recording medium, forms image, it is characterized in that, and this image processing system possesses:

Described top sensor has the detection arm rotating centered by axle, and this detection arm is arranged to give prominence in described the first paper feed path,

Described the second paper feed path comprises:

Described the first paper feed path comprises:

4. the image processing system as described in any one in claim 1～3, wherein,

Described recording medium transporting direction in described the first interval is contrary with the described recording medium transporting direction in described the 4th interval.

5. the image processing system as described in any one in claim 1～3, wherein,

Described image formation unit comprises transfer roll, organic photoconductor and developer roll, by being transferred to the corresponding toner image of view data the recording medium transporting, forms thus image on recording medium.