JPS6077048A - Printer - Google Patents

Abstract

PURPOSE:To enhance jam sensing accuracy by inspecting the paper size from No.1 sensor transit time, and by making optimum the jam sensing timing by a downstream sensor. CONSTITUTION:No.1 sensor 101 is installed at a hand feed inlet, and when printing is started, the paper size is judged from the time for passage of No.1 sensor 101, and thereafter the stagnant jam sensing timing by No.2 sensor 104 installed in the downstream of transportation 102 is made optimum. Thus the accuracy of jam sensing in enhanced. This can prevent impossibility of taking jam sheet or damage of any unit associate with transportion.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a jam detection control method in a printer device having a manual paper feeding section, particularly in a page printer type device.

[Prior art]

In a laser beam printer, when the paper is a cut note, it is usually stored in a cassette, and all the paper is controlled based on the size signal of the cassette. Further, in the case of fan-fault paper, the width, folding length, etc. of the paper are known to the printer in advance, or the size is learned, and paper conveyance control is performed according to the set paper. In either case, information regarding the paper size is notified to all printers, and unless the paper size matches the appropriate paper size to be printed, the paper size is different (an error) and the printer is configured to not print one line at a time.

By the way, there are restrictions on the quality of paper that can be loaded into a cassette in terms of thickness, smoothness, etc., and 19-paper and 7-mark paper can cause feeding problems, and it is particularly difficult to separate paper feeds, resulting in double feeding. , skewing, jamming, bent edges, etc. frequently occurred, making it unusable in many cases.

In order to solve this problem, laser beam printers equipped with the manual paper feeding mechanism used in copying machines, etc. have appeared, and by manually feeding paper one by one to the printer, the problem occurs when paper is separated. Problems such as double feeding, skew feeding, and jams that tend to occur are completely eliminated, and it is now possible to print on a wide variety of paper types and sizes.

In this way, although the laser beam printer equipped with the manual feed mechanism has fewer restrictions on paper and is more convenient to use, it has also caused other problems. In other words, since the star size is not fixed when paper is manually fed, the paper detection timing may be incorrectly detected as a jam when the paper with the maximum length in the transport direction is passed through. , I have to make sure I have a good timing.

For small size groups, f': I Wf jam detection or delay;
/ Yam paper could no longer be removed, or in extreme cases, a field was generated that could deform or damage a part of the device. On the other hand, in the case of a delayed jam, the leading edge of the paper is checked regardless of the size, so this problem (↓) does not occur.

Now, in order to solve the above problems, one possible method is to set the paper size for manual paper feeding by the operator using an input means such as a switch, and then change the set size. This method determines the jam constant by

This method requires the operator to know the monthly delivery and chair size, and it is meaningless unless all sizes are specified, and it is not necessary to specify them one by one. There is, and it cannot be used for h14 because it is trivial and Menshun 1.

Another method is to use a host printer to manually print all the paper sizes to be output using a laser beam printer.
There is a method of notifying the other side and setting a jam detection constant for this size 1a reward 21. Compared to the above-mentioned method, this method requires less intervention from the operator and is more convenient, but the host connected to the splitter does not necessarily output the size information (7 times is 1
・Since there is no μ, if the size is not specified, the maximum paper size will be checked as before.

〔the purpose〕

The invention was made in view of the above-mentioned problem V, and when paper is handed over to a printer device, it creates a jam detection timing based on the grain of the paper that is handed over, and detects jams located downstream of the conveyance path. This is an attempt to perform a jam check on Susu/Su. In other words, a first sensor is installed in the manual feed area, and after starting printing, the paper size is determined based on the time it takes for the paper to pass through the first seven sensors. By optimizing the 14'h jam detection timing, it is possible to improve the accuracy of jam detection, thereby preventing jammed paper from becoming unremovable and damage to the single conveyance unit. It is an object.

〔Example〕

The present invention will be explained below based on all the drawings. Figure 1 shows
FIG. 1 is a configuration block diagram of the present invention. The first hole provided in the hand opening
Data calculation is performed to detect the entire width of paper in the conveying direction when the paper is manually fed from the detection means 101 and the paper feeding means 102 (105), and the jam detection means 104 is controlled based on this data. It is.

FIG. 2 shows a schematic configuration of an embodiment of a laser beam printer to which the present invention is fully applied, in which a scanning optical system unit 201 including a scanner motor, a voricon mirror, a mirror, etc. is disposed in the upper part of the main body 200. , this unit is attached to the board 202 of the main body Bi1. A rotating cylindrical photoreceptor 203 is disposed below the substrate 202, and around it are a charger 204, a developer 205, a transfer charger 206, a cleaning device 207, and other devices 14.
Each of these members is housed inside the casing 208 on the nJv self-photosensitive photoreceptor 203 and processed as a process killer]・21
0 is formed. Image exposure according to information from the optical system unit 201 is applied to the surface of the photoreceptor uniformly charged by the charger 204 through the aperture 201a of this unit, the aperture 202a of the substrate 202, and the aperture 208 of the casing 208.
a(ix) to form a first electrostatic latent group, and then this first latent group is visualized by the developer 205, and a transfer charger is applied to the transfer material fed to the manual feed entrance A. The transfer material is transferred at the transfer site where the toner image is present.The transfer material moves to the left (arrow) in the figure while holding this toner image, is fixed and fixed at the position of the fixing device 209, and is discharged from the main body. The toner that did not contribute to the transfer at the transfer site is removed from the photoreceptor 203 by the cleaning device 207.
The image forming process is then repeated in the same manner as described above.

Next, paper conveyance will be explained. When the operator inserts paper from manual entrance A, a light emitting lamp 2 will appear at the entrance.
There is also a population sensor S1 consisting of a light receiving element 21 and a light receiving element 222, which activates all printer operations by detecting the presence of paper. At this time, the leading edge of the paper is
5, it is stopped halfway at l' (41), and is fed out at a predetermined timing when the printer starts operating. At this 7th point, after the paper feeding command is issued, the paper reaches the population sensor S+'. The time it takes for the paper to completely pass through varies depending on the paper size.In other words, if the time it takes for the paper to pass through the entrance sensor S1 is known, the size of the paper can be determined.

Now, the paper that has passed through the entrance sensor S+ undergoes the image forming process as described above, passes through the fixing device 209'fc, passes through the paper ejection roller 226, and is ejected onto the paper ejection tray B. (O-9226 part (-1, luminescent lamp 22
3 and a light receiving element 224 is provided to check for paper jams. 2 for jam detection
ii+: There is 1 yen, and the jyj extension jam does not depend on the set size, so check with the - foot timing/g. On the other hand, since the check timing for the accumulated jam changes depending on the size of the paper, the paper size information awaited by M+1 entry - H/S is used to determine whether the oil is drained or the accumulated jam of the sensor S2 is detected.

FIG. 3 is an enlarged view of the registration roller 225 section. In this figure, the paper leading edge 61 is inserted between each side/strike ζ2 2225, and
At i11-1, the light of the entrance S/S, tlt+
l + bite. The total paper length in the transport direction e (unknown) and (7,
When the conveyance speed is V (design value) and the registration row 2226 is activated, g-=t, ・V+Ll,...
...11). Otsu's l's 1st hour (
], it becomes possible to verify the paper size.

Figure 4 shows the Thai S7 Guchiard gold. 15 hours after setting all the paper in the manual paper feed section, Brimet is started.
Furthermore, τ2 hours after starting printing, the registration roller 22
5 and send the paper. The time t+it is read from the time the registration is activated until the output of the population sensor S1 is turned off due to the passage of paper. At a time T j fix from the start of printing, the output of the paper discharge sensor S2 is checked to check for a delayed jam. At the same time, check the output sound of the paper ejection sensor S at the printing start time Tjmax-△'P, fl)! Check for residual jams. Here, 67 hours is a value that varies depending on the size of the paper size.
, , , , , , , , (2+■) is given. 1rnax is the length in the transport direction of the maximum paper size, and from equations (1) and (2), mulvJIna
It becomes possible to express X t,'v L+ , , , , , (3) ■.

If 14=1max, then 1, of course ΔT=O, so the accumulated jam check in the case of the maximum paper size will take Tjznax time from the time of starting printing.

In FIG. 5, a control block homophone 71 is shown. In the figure, block 600 is a processing block of the printer, and block 650 is a processing block of the host 1i.
Q It is
(JM602, RAM6Q3 and input (Th number system @
A peripheral interface adapter (PJ, A) 604 is connected. Above PIA6
04, each second input/output 1/() of the printer body is connected 1;
"Enter 1" sensor S7,60γ Jakuyopi paper discharge sensor 52.61
)9 are connected to 2 via comparators 608 and 611, respectively.
On the other hand, manual print/print display is a process of precision between the processing block 650 on the host side, which is output to the display 611 via the drive circuit 612, and the processing block 600 on the printer side. The exchange of information is carried out via the bus line in the figure. FIG. 6 shows a flowchart for manual printing.

At step 501, a check is made as to whether or not it is manual printing, and if it is not manual printing, the process branches to ltE'rVltN.

In addition, in the case of manual bulleting, in step 502,
The display (not shown) is turned on completely to notify the operator of the manual request. In step 503, the process waits until the output of the entrance sensor SI is turned ON, that is, until the operator sets all the sheets. In step 504, the inlet sensor S
75 hours after the output of No. 1 is turned on, the bullet is started and a series of grooves/tongues are all started. At step 505, a reference timer is started at the same time.

In step 506, after 1211.13 minutes, the registration roller 225- is started for Japanese shipping. Step 50.7
The elapsed time until the output of the entrance sensor S is turned off due to the passage of paper is 1. Load. Step 508
Now, (ijt) of Δ′1゛ given by the above equation (3) is fully calculated. In step 509, a new fA′5 residue jam constant Tj is created based on the value of Δ′j゛. In step 510, , all M extended jams are checked at the Tjfix time.In step 511, all checks are made to see if the output of the paper ejection station S2 is ON, and if it is, it is determined that an extended jam has occurred and the process branches to step 516. Step 5
At 12, the output of the paper discharge center S2 is checked at the 11th hour. In step 513, all checks are made to see if the output of the paper ejection sensor S2 is (kawa+'f<"), and if ON1 and the like, it is determined that a jam has occurred and the process branches to step 516. In step 514, a series of printing operations is completed. After the paper has been ejected completely, stop printing completely.Step 5
In step 15, turn off the handheld bullet display. In addition·
In step 51, the printing process is stopped, and in step 517, the process branches to another routine for jam processing.

[Example of Sen]

Above, all embodiments of the present invention have been described for the case of manual printing, but the present invention can also be applied to the case of cassette paper feeding in which no paper size signal is set. Cassette & J, which is normally referred to as a "universal cassette", can be said by simply changing the number 14 of the partition plate in the paper storage area. Therefore, the same problem that occurred in the case of manual paper feeding also occurs in the case of Uniparzer I/cassette 2. In this case, as well as in the case of manual printing, a new timing must be set. By creating this, it becomes possible to create the optimal jam detection timing for paper of unknown size.

Further, in the above embodiment, the case where there is one jamseer/slug was explained, but even if a plurality of jamseers/slugs are provided, the timing system (Ml.
It is clear that 'r can be done. In addition, the formats and types of these cells/studies are subject to the details of the implementation of the present invention. Of course, A7 is not limited to samurai.

〔effect〕

As explained above, paper of undefined size is detected using a sensor in the conveyance path F7, and the kite size is verified based on the time it takes for the paper to pass through this sensor section (7. Jam detection timing of another sensor installed downstream) is configured to be optimized according to the paper size, improving the accuracy of detecting jams.
This has the effect of preventing damage to the device body due to jammed paper and reducing the burden of handling jams during operation.

[Brief explanation of drawings]

Fig. 1 is a block diagram of the 4) four components of the present invention, Fig. 2 is a schematic block diagram of an embodiment of a laser beam splitter to which the present invention is applied, and Fig. 3 is an enlarged view of the registration roller section. Figure, 4th
The figure is a timing chart, the 51st line is a control block diagram, and FIG. 6 is a flowchart when the hand is inserted. 101, Sl...... Entrance section 7 (first paper leaf detection means) 104, S2...... Paper discharge sensor (Yang 2 paper leaf detection means) 102...・・・・・・・・・・・・-M (Feeding means 200 ・・・・・・・・・・・・・・・・ Laser beam printer main body Fig. 1 Fig. 2 Fig. 3

Claims (1)

[Claims] In a printer device that uses sheet paper, at least two paper sheet detection means are provided in the conveyance path, and the first paper sheet detection means is located upstream of the conveyance path, and when the entire sheet passes through The size information is measured, and the jam detection timing when the paper sheet passes is completely corrected for at least one paper sheet detection means based on the n++j constant value. Buri/refinishing equipment.