JPH06754U - Paper guide structure of printer - Google Patents

Abstract

(57) [Abstract] [Purpose] The paper guide plate is configured so as not to come into contact with the feed hole portion of the continuous paper in the printing direction, and prevents the paper fluff from being removed from the printing paper and forming paper dust. As a result, it is possible to realize a printer having high durability performance that maintains the same print quality as that at the beginning even after long-term use. In particular, in the inkjet method, a printer having high printing reliability and a high actual printing speed is realized. [Structure] At least a print head 2, a continuous paper 17 printed by the head, a tractor 3 for conveying the continuous paper, and a paper guide plate 1 for guiding the continuous paper, the paper guide plate being a feed hole portion of the continuous paper. It is configured so as not to come into contact with the print direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a paper guide structure for a printer.

[0002]

[Prior art]

 FIG. 2 shows a paper guide structure of a conventional printer. The width of the paper guide plate 1 was set to be larger than the maximum paper width to enter the printer, and the entire width of the printing paper 17 including continuous paper was guided.

[0003]

[Problems to be solved by the device]

 However, in the structure as shown in FIG. 2 described above, every time the feed hole portion of the continuous paper 17 passes through the paper guide plate 1, the fibers (paper fluff) of the paper coming out from the end face of the feed hole are removed, and It becomes powder and scatters inside the printer. If the printer is used for a long period of time with this paper dust contained, the paper dust adheres strongly to the paper feed roller or the rubber roller called the platen, the friction coefficient of the roller decreases, and the paper feed amount during printing varies. When the printing paper is inserted into the printer, the printer will not be able to incline and it will become a non-durable printer. In order to repair this, it is necessary to remove the paper feed mechanism and replace the roller, which results in high after-sales service costs for the user. Also, in inkjet type printers, this paper dust adheres to the vicinity of the nozzles from which ink is ejected, causing the ink ejection direction to be bent, or in the worst case, the nozzles to become clogged, resulting in less printing. The printer becomes unreliable. For this reason, there is an operation to remove paper dust called a cleaning operation once every several tens of seconds, so that the operation method is complicated and expensive, and a reduction in printing speed cannot be avoided.

Therefore, the present invention solves such a problem, and an object of the present invention is to enable a printer having high durability performance that maintains the same print quality as the initial one even when used for a long period of time. Provides a printer with high printing reliability and high actual printing speed to the market at low cost.

[0005]

[Means for Solving the Problems]

 The paper guide structure of the printer of the present invention comprises at least a print head, a continuous paper to be printed by the head, a tractor for conveying the continuous paper, and a paper guide plate for the continuous paper. It is characterized in that it is configured so as not to come into contact with the feed hole portion of continuous paper from the printing direction.

[0006]

【Example】

 FIG. 1 is a diagram showing the positional relationship in the digit direction showing the relationship between the print range of the printer, the paper guide plate width, and the paper width used in the embodiment of the present invention. FIG. 3 is a side view of the printer mechanism portion in the embodiment of the present invention. It is a figure. Reference numeral 1 is a paper guide plate made of SUS304, 1a is a front end portion of the paper guide plate that comes into direct contact with the printing paper 17, and is formed by a punching process of a press. There is. 2 is an ink jet type print head, 3 is a sprocket tractor, 4 is a paper plan made of ABS resin, 5 is an A4 or letter size cut sheet, so that you can put the sheets together to feed them one by one The tray is made of ABS resin, and is fed one by one from a tray 5 to a paper path constituted by a paper feed roller 6 and a paper guide lower 4 by a paper feed roller 14 made of rubber having a high friction coefficient. The paper feed roller 6 is made of rubber, and 7 is attached so that a driven roller 8 made of PP can freely rotate on a paper guide made of POM. A preload spring 18 is hung between the base frame 15 made of SPCC and the paper guide top 7, and the driven roller 8 is pressed against the paper feed roller 6 by the spring force, and the printing paper 17 is inserted therebetween. Then, the paper is sent to the print head 2 side by the amount of rotation of the paper feed roller 6 by the frictional force, and when it reaches the ABS resin platen 9, the print head 2 prints. After printing, the printing paper 17 is discharged to the outside of the printer by the rubber discharge roller 13 and the discharge zipper roller 10. The above-mentioned paper discharge roller 10 is held by the paper discharge frame 11, and is pressed against the paper discharge roller 13 side by a notched roller pressing spring 12 also attached to the paper discharge frame 11. The continuous paper is fed from the sprocket tractor 3 and is fed below the print head 2 through a paper path formed between the lower paper guide 4 and the upper paper guide 7. The manual feed guide 16 is formed integrally with a lower case made of ABS resin so that the printing paper inserted in the paper path formed together with the paper guide top 7 does not get caught at the contact point between the paper feed roller 6 and the driven roller 8. It guides you to push it in.

As can be seen from FIG. 1, the width of the leading end portion 1a of the paper guide plate of the present invention is wider than the printing range of 80 digits, but is set so that it does not cover the feed hole portions on both ends of a 10-inch wide continuous slip sheet. ing. In this case, the paper feed pin of the sprocket tractor 3 enters the paper feed hole of the continuous slip sheet, and when the pin is removed after feeding the paper, the paper fluff rises from the end face of the paper feed hole. When the paper feed hole is rubbed with the paper guide plate in this state, the rising paper fluff is scraped off, and becomes paper dust and accumulates between the paper guide plate tip 1a and the printing paper 17. If this paper dust stays there, there will be no particular problem, but it will stick to the paper feed roller 6 or print when the perforations of continuous slip paper pass or when the paper used is switched from continuous paper to cut paper. It even comes out under the head 2. If printing is continued as it is, paper dust adheres to the surface of the paper feed roller 6 and the friction coefficient is partially reduced, and the paper feed amount varies depending on the location. If this happens, the fed printing paper will be tilted every time the paper is fed, and the printing result will be slanted, or it will be overprinted with the previous line and cannot be used as a printed matter. turn into. Also, in the case of an inkjet printing head as in this example, if paper dust adheres to the nozzle surface from which ink is ejected, the ink droplet may bend instead of flying straight, or in the worst case, the nozzle hole may be clogged and the ink may be blocked. Will not fly at all. As a cleaning operation that enables printing of this, a rubber cap is pressed against the nozzle surface and the suction pump sucks out the paper powder together with the ink, and then the rubber wiper wipes the ink droplets and paper remaining on the nozzle surface. You need to wipe off the powder. As is clear from this, if this cleaning operation is frequently performed, the ink originally used for printing is discarded to recover the nozzle clogging, and the ink is exhausted before printing too much. Therefore, users will have to purchase new ink cartridges even if they do not print, resulting in poor cost performance. These are fatal drawbacks for printers, and if they are to be made into commercial products, they will cost a great amount of cleaning equipment, and only as a high-priced printer that requires frequent replacement of large ink cartridges. It cannot be offered to the market.

In order to eliminate the above-mentioned drawbacks, the present invention prevents the paper fluff, which is the root cause, from being removed from the printing paper and becoming paper dust. It is possible to provide a printer with a high durability performance that keeps the printer in good condition, especially in the ink jet system, which has high printing reliability and a high printing speed at a low cost.

[0009]

[Effect of device]

 As described above, the paper guide structure of the printer of the present invention comprises at least the print head, the continuous paper printed by this head, the tractor for conveying the continuous paper, and the paper guide plate for guiding the continuous paper. The paper guide plate is configured so as not to come into contact with the feed hole portion of the continuous paper in the printing direction. As a result, every time the continuous paper feed hole passes through the paper guide plate, the paper fibers (paper fluffs) coming out from the end face of the feed hole are removed, and it is possible to prevent the paper fibers from scattering into the printer. Therefore, even if the printer is used for a long period of time, paper dust adheres strongly to the rubber roller called the paper feed roller, which lowers the friction coefficient of the roller and causes the paper feed amount to vary during printing. It is possible to realize a printer with high durability that does not cause problems such as tilting when inserting it, and does not require users to pay high after-sales service costs. In particular, in inkjet printers, this paper dust adheres to the vicinity of the nozzle from which ink is ejected, causing the ink ejection direction to bend, and in the worst case, the nozzle is clogged, and cleaning is performed once every tens of seconds. Since there is no need for the action of collecting paper dust called the action, the operation method is simple and inexpensive, and the printing speed can be improved. In other words, it enables a printer with high durability that maintains the same printing quality as the initial one even after long-term use, and with the inkjet method, it provides a printer with high printing reliability and high actual printing speed to the market at low cost. Is possible.

[Brief description of drawings]

FIG. 1 is a diagram showing a positional relationship in the digit direction of a printer according to an embodiment of the present invention.

FIG. 2 is a diagram of a paper guide structure in a conventional printer.

FIG. 3 is a side view of a printer mechanism portion according to the embodiment of the present invention.

[Explanation of symbols]

 1 Paper Guide Plate 1a Paper Guide Plate Tip 2 Print Head 3 Sprocket Tractor 4 Paper Guide Lower 5 Tray 6 Paper Feed Roller 7 Paper Guide Upper 8 Driven Roller 9 Platen 10 Paper Ejection Gutter Roller 11 Paper Ejection Frame 12 Giza Roller Holding Spring 13 Paper Ejection Roller 14 Paper feed roller 15 Base frame 16 Manual feed guide 17 Printing paper 18 Preload spring

Claims (1)

[Scope of utility model registration request] 1. A print head, a continuous sheet printed by the head, a tractor for conveying the continuous sheet, and a paper guide plate for guiding the continuous sheet,
A paper guide structure for a printer, wherein the paper guide plate is configured so as not to come into contact with the feed hole portion of the continuous paper in the printing direction.