JP2007099458A - Printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printer capable of preventing wear of a part of a paper guiding member arranged along a conveyance path of a continuous paper and causing friction by coming into contact with an end part in the direction of path of paper when conveying the continuous paper. <P>SOLUTION: A glass chip 38 is fitted into a surface part of a paper roll guide 18 in the vicinity of a bent part of a paper roll path 50 in which a paper roll 40 is bent by a tension member 32. Here, the surface part of the paper roll guide 18 in the vicinity of the bent part of the paper roll path 50 is a part coming into contact with the end part in the direction of conveyance path of the paper roll 40 when conveying the paper roll 40 to prevent wear of the paper roll guide 18 due to friction of an end part of the paper roll 40 and a surface of the paper roll guide 18. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a printer, and in particular, in a paper guide member disposed along a continuous paper conveyance path, when conveying continuous paper, it comes into contact with an end portion in the paper path direction during continuous paper conveyance and causes friction. The present invention relates to a printer capable of preventing wear of a portion of a paper guide member that causes a problem.

  Roll paper obtained by winding continuous paper in a roll shape can be efficiently stored in a narrow space, and thus is used in various printers. The continuous paper drawn from the roll paper is printed and then cut by an auto cutter provided in the printer. The cutting using the auto cutter includes a case where the continuous paper is completely cut and a case where a cut is made while leaving a part of the paper. The case of cutting completely is called a full cut, and the case of making a cut while leaving a part is called a partial cut. Patent Document 1 proposes a printer that is compact and can be realized at low cost by driving a continuous paper transport mechanism and an auto cutter with a single motor.

JP 2001-226029 A

  However, when the continuous paper is transported along the transport path, the paper guide member of the printer has a surface portion that comes into contact with the end of the paper in the path direction and generates friction. In some cases, the surface portion is worn by the conveyance of the paper, and the printing position or the cutting position of the paper is shifted in the worn direction. For this reason, there has been a problem that printing failure and auto cutter failure occur. FIG. 7 is a diagram for explaining an example of an auto cutter failure, FIG. 7A is a diagram for explaining a paper cutting method, and FIG. 7B is a diagram showing a cut due to an auto cutter failure. It is a figure for demonstrating the state of a paper. FIG. 8 is a diagram for explaining an example of printing failure.

  As shown in FIG. 7, in the scissors method in which the roll paper 40 is cut like scissors by the fixed blade 62 and the movable blade 64, the cut position of the roll paper 40 is shifted in the A direction, so that it remains uncut in the case of all cuts. Auto-cutter defects occur, such as when there are parts, or there are many uncut parts in the case of partial cut. Further, by shifting in the B direction, an auto cutter failure that is completely cut in the case of partial cut occurs. Further, FIG. 8 shows a printing result when the roll paper 40 is displaced in the B direction in FIG. As shown in FIG. 8, the printing position of the paper shifts, and a printing defect occurs in which a part of the print data to be printed is not printed.

  The present invention has been made to solve the above-described problems, and in the paper guide member arranged along the continuous paper conveyance path, the continuous paper is conveyed when the continuous paper is conveyed. It is an object of the present invention to provide a printer capable of preventing the wear of the surface portion of the paper guide member that is in contact with the end portion in the path direction and generates friction.

The following invention is provided to solve the above-mentioned conventional problems.
A printer according to a first aspect of the present invention includes one or a plurality of paper guide members arranged along a paper transport path for guiding the paper to a paper discharge port. When a part of the paper guide member including a surface region that generates friction by contact with the end in the transport direction is a contact portion, at least one paper guide member of the one or more paper guide members is It is a paper guide member in which a friction reinforcing member is fitted to at least one contact portion of one or a plurality of contact portions existing in the paper guide member.

  Thereby, the wear of the paper guide member due to the conveyance of the paper can be prevented. Therefore, the printing position of the paper is ensured at an optimal position for a long time, and printing processing with good quality can be executed for a long time. Further, the cutting position of the continuous paper is ensured at an optimum position for a long period of time, and the continuous cutting of the continuous paper can be executed for a long time.

  A printer according to another aspect of the present invention is characterized in that the material of the friction reinforcing member of the printer according to the above-described aspect of the present invention is glass or ceramics.

  In the printer according to another aspect of the present invention, the material of the friction reinforcing member of the printer according to the above-described aspect of the present invention is a material having a friction coefficient that is approximately equal to or smaller than that of glass. It is characterized by.

  A printer according to another aspect of the present invention is characterized in that the material of the friction reinforcing member of the printer according to the above-described aspect of the present invention is a material having a hardness comparable to or greater than the hardness of glass. To do.

  A printer according to another aspect of the present invention includes one or a plurality of paper guide members arranged along a paper transport path for guiding the paper to a paper discharge port. When a part of the paper guide member including the surface region that generates friction by contact with the end in the transport direction is a contact portion, at least one of the one or more paper guide members is It is a paper guide member in which at least one contact portion among one or a plurality of contact portions existing in the paper guide member is subjected to friction reinforcement coating.

  Thereby, the wear of the paper guide member due to the conveyance of the paper can be prevented. Therefore, the printing position of the paper is ensured at an optimal position for a long time, and printing processing with good quality can be executed for a long time. Further, the cutting position of the continuous paper is ensured at an optimum position for a long period of time, and the continuous cutting of the continuous paper can be executed for a long time.

  A printer according to another aspect of the present invention is characterized in that the friction reinforcing coating of the printer according to the aspect of the present invention described above is a ceramic coating.

  A printer according to another aspect of the present invention is characterized in that the contact portion of the printer according to the above-described aspect of the present invention is in the vicinity of the bent portion of the transport path or in the vicinity of the paper discharge port.

  With the above-described configuration, the paper guide member disposed along the continuous paper conveyance path contacts the end of the continuous paper path in the paper path direction when conveying the continuous paper, and causes friction. It is possible to prevent wear of the guide member portion. Therefore, it is possible to prevent the paper guide member that regulates the width of the paper from being worn away due to wear and the paper from being displaced. As a result, the printing position of the paper is ensured for an extended period of time, and printing processing with good quality can be executed for a long period of time. Further, the cutting position of the continuous paper is ensured at an optimum position for a long period of time, and the continuous cutting of the continuous paper can be executed for a long time.

  An embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below is for explanation, and does not limit the scope of the present invention. Accordingly, those skilled in the art can employ embodiments in which each or all of these elements are replaced by equivalents thereof, and these embodiments are also included in the scope of the present invention.

  FIG. 1 is an external perspective view showing an example of a printer equipped with an auto cutter to which the present invention can be applied. FIG. 2 is a perspective view showing a schematic configuration in a state where the cover of the printer of FIG. 1 is opened. As shown in FIGS. 1 and 2, the printer 10 includes a printer frame 12 and a cover 14. A paper discharge port 16 is provided on the upper surface side of the printer frame 12, and an end portion of the printed roll paper is discharged from the paper discharge port 16.

  Further, a roll paper holder 22 is provided inside the printer 10 so that the roll paper 40 (see FIG. 3) can be accommodated. A roll paper guide 18 is provided on one side surface of the roll paper holder 22 so that the position in the width direction of the roll paper 40 having different paper widths can be adjusted. The cover 14 is provided with a platen roller (platen) 20, and a print head 24 (see FIG. 3) is provided in front of the roll paper holder 22. The platen 20 is disposed to face the print head 24 in a state where the cover 14 is closed, and sandwiches the paper drawn from the roll paper 40.

  FIG. 3 is a cross-sectional view showing an outline of the internal configuration of the printer shown in FIG. As shown in FIG. 3, the roll paper holder 22 that is provided inside the printer 10 and can store the roll paper 40 has a curved bottom surface and a flat side surface. It can be stored in a stable state. In front of the roll paper holder 22, the print head 24 is fixed by a head mounting plate 26, and a spring 28 is fixed by a spring mounting plate 30 and is provided in the printer 10.

  In a state where the cover 14 is closed, the print head 24 is pushed in the direction of the platen 20 facing the print head 24 by the elastic force of the spring 28. As a result, the roll paper 40 is sandwiched between the platen 20 and the print head 24. When the platen 20 is driven in this state, the roll paper 40 is conveyed to the paper discharge port 16. At this time, printing is performed on the roll paper 40 by driving the print head 24. Further, in the roll paper path 50, a tension that is configured to be swingable so as to give a predetermined tension in the middle of the roll paper 40 from the roll paper holder 22 to a position sandwiched between the platen 20 and the print head 24. A member 32 is provided. The roll paper 40 generates an abrupt tension load due to its inertial force at the start of paper feeding, but the tension member 32 located at a bent portion of the paper path 50 and in a position where it is easily subjected to the tension swings, thereby causing an abrupt tension load. Can be absorbed, enabling smooth paper feeding. A fixed blade 34 for cutting the roll paper 40 by the scissors method is installed on the cover 14 side near the paper discharge port 16, and an auto cutter unit 36 with a built-in movable blade is provided on the printer frame 12 side. The cutting mechanism is configured when the cover 14 is closed. By the cutting mechanism, the roll paper 40 conveyed along the roll paper path 50 is cut and discharged from the paper discharge port 16.

  Further, a glass chip 38 is fitted into the surface portion of the roll paper guide 18 in the vicinity of the bent portion of the roll paper path 50 where the roll paper 40 is bent by the tension member 32. Here, the surface portion of the roll paper guide 18 in the vicinity of the bent portion of the roll paper path 50 is a portion that comes into contact with the end of the roll paper 40 in the conveyance path direction when the roll paper 40 is conveyed. This is to prevent the roll paper guide 18 from being worn by the friction between the end of the roll paper and the surface of the roll paper guide 18. In the bent portion of the roll paper path 50, when the roll paper 40 is conveyed along the roll paper path 50, the position of the roll paper 40 in the width direction tends to be closer to one side than the initial use of the printer 10. Since the roll paper 40 is conveyed toward one side, the end of the roll paper 40 and the surface of the roll paper guide 18 come into contact with each other, and particularly large friction occurs. Since the end face of the roll paper 40 has a file-like effect, wear tends to occur particularly in a portion where the friction is large. With the wear, the roll paper guide 18 that regulates the paper width of the roll paper 40 is scraped, causing the roll paper 40 to shift. Inserting the glass chip 38 into the surface portion of the roll paper guide 18 described above is an effective prevention measure when the roll paper 40 tends to approach the roll paper guide 18 side.

  The deviation of the position in the width direction of the roll paper 40 described above is a shift in the balance in the width direction of the platen 20 due to an upward force applied to the platen 20, the shape of the platen 20, and the gear train for driving the platen 20. This is caused by a shift in the rotational distance in the width direction of the roll paper 40 on the platen 20 due to the shape or the like.

  FIG. 4 is a view for explaining a deviation of the position of the roll paper 40 in the width direction, and FIG. 4A is a view showing the positions of the gear train and the motor for driving the platen 20, FIG. 4B is a diagram for explaining the force applied to the platen 20.

  As shown in FIG. 4A, when the width direction of the platen 20 is the left-right direction, the gear train and the motor are arranged on the left side of the platen 20. When the gear having the same rotation axis as the rotation axis of the platen 20 is the gear A, and the gear transmitting the rotation by the motor to the gear A is the gear B, the gear A and the gear are in a positional relationship as shown in FIG. When the gear A rotates when the gear B is engaged with the gear B, when the gear A rotates in the direction a and the gear B rotates in the direction b, the gear B is in the downward direction Fb at the meshing portion of the gear A and the gear B. Adds power with ingredients. On the other hand, a force having an upward component Fa is applied to the gear A.

  Therefore, a force having an upward component Fa applied to the gear A is applied to the side of the platen 20 where the gear A is installed. That is, the force Fa is applied to the left end of the platen 20 in the width direction. Therefore, the left side in the width direction of the platen 20 is lifted upward relative to the right side, the platen 20 has an inclination in the width direction, and the platen 20 has an inclination in the width direction, whereby the roll paper 40 on the platen 20 is inclined. The position in the width direction is shifted to the right. Therefore, in FIG. 3, since the gear train and the motor for driving the platen 20 are arranged on the left side of the platen 20, the roll paper 40 is transported toward the right side, so that it is arranged on the right side of the roll paper 40. It is effective that the glass chip 38 is fitted in the vicinity of the bent portion of the roll paper path 50 of the roll paper guide 18 that is provided.

  Further, the offset of the roll paper 40 is also affected by non-uniformity in the balance of the elastic force of the spring 28 that presses the print head 24 against the platen 20. FIG. 5 is a diagram for explaining the balance of the spring 28 that presses the print head 24. As shown in FIG. 5, when the pressing force is configured by using a plurality of springs 28, the pressing load is changed in the longitudinal direction between the print head 24 and the platen 20 due to variations in the pressing load of each spring 28. Variations may occur. In this case, due to the slight inclination of the roll paper 40 held in the roll paper holder 22, the roll paper 40 is moved to either the left or right side and conveyed while being in contact with the side surface of the roll paper guide 18 or the roll paper boulder 22. Tend to occur. When approaching the roll paper guide 18, the glass chip 38 may be fitted on the roll paper guide 18 side as described above.

  Here, in FIG. 3, the glass chip 38 is fitted into the roll paper guide 18, but it is also possible to fit the glass chip 38 into the side surface portion of the roll paper boulder 22 disposed on the left side of the roll paper 40. It is. Further, the glass chip 38 can be fitted into both the roll paper guide 18 and the side surface of the roll paper boulder 22. Further, not only in the vicinity of the bent portion of the roll paper path 50, but also when the roll paper 40 is conveyed, the glass chip 38 is fitted into a portion that is expected to come into contact with the end portion in the width direction of the roll paper 40 and wear. It is also possible. FIG. 6 is a view showing a position where the glass chip 38 is fitted. In the vicinity of the bent portion of the roll paper path 50, the glass chip 38 is fitted into a portion where the roll paper 40 is expected to be worn by contact with the end portion in the width direction of the roll paper 40 during conveyance.

  In addition, as described above, in FIG. 3, the glass chip 38 is fitted into a portion that is expected to be in contact with the end portion in the width direction of the roll paper 40, but may be ceramic. Further, a material having a friction coefficient comparable to that of glass or smaller than that of glass may be fitted into a portion that is expected to be in contact with the end of the roll paper 40 in the width direction and to be worn. Further, a material having a hardness comparable to that of glass or greater than that of glass may be fitted into a portion that is expected to be in contact with the end of the roll paper 40 in the width direction and to be worn.

  Further, as described above, in FIG. 3, the glass chip 38 is fitted in the portion that is expected to be worn by contact with the end portion of the roll paper 40 in the width direction. You may make it prevent abrasion by painting the part which is anticipated to be in contact with an edge part, such as a ceramic coating.

  These enable the present invention to be similarly applied.

1 is an external perspective view illustrating an example of a printer including an auto cutter to which the present invention can be applied. FIG. 2 is a perspective view illustrating a schematic configuration in a state where a cover of the printer of FIG. 1 is opened. FIG. 2 is a cross-sectional view illustrating an outline of an internal configuration of the printer illustrated in FIG. 1. FIG. 4A is a diagram for explaining a shift of the position of the roll paper 40 in the width direction, and FIG. 4A is a diagram showing the positions of a gear train and a motor for driving the platen 20, and FIG. ) Is a diagram for explaining the force applied to the platen 20. FIG. 4 is a diagram for explaining the balance of a spring 28 that presses the print head 24. It is the figure which showed the position which inserts the glass chip | tip 38. FIG. FIG. 7A is a diagram for explaining an example of an auto cutter failure, FIG. 7A is a diagram for explaining a paper cutting method, and FIG. 7B shows a state of a cut sheet due to an auto cutter failure. It is a figure for demonstrating. It is a figure for demonstrating an example of a printing defect.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Printer 12 Printer frame 14 Cover 16 Paper discharge port 18 Roll paper guide 20 Platen roller (platen)
22 Roll paper holder 24 Print head 26 Head mounting plate 28 Spring 30 Spring mounting plate 32 Tension member 34 Fixed blade 36 Auto cutter unit 38 Glass chip 40 Roll paper 50 Roll paper path

Claims (7)

One or a plurality of paper guide members arranged along a paper transport path for guiding the paper to a paper discharge port;
When a part of the paper guide member including a surface region that generates friction by contact with an end portion in the conveyance direction of the paper at the time of conveyance of the paper is a contact portion,
At least one of the one or a plurality of the paper guide members is connected to at least one of the contact portions of the one or a plurality of the contact portions existing on the paper guide member. A printer comprising the paper guide member fitted with a friction reinforcing member.   The printer according to claim 1, wherein a material of the friction reinforcing member is glass or ceramics.   The printer according to claim 1, wherein the material of the friction reinforcing member is a material having a friction coefficient that is equal to or smaller than that of glass.   2. The printer according to claim 1, wherein the material of the friction reinforcing member is a material having a hardness comparable to or higher than that of glass. One or a plurality of paper guide members arranged along a paper transport path for guiding the paper to a paper discharge port;
When a part of the paper guide member including a surface region that generates friction by contact with an end portion in the conveyance direction of the paper at the time of conveyance of the paper is a contact portion,
At least one of the one or a plurality of the paper guide members is connected to at least one of the one or a plurality of the contact portions existing on the paper guide member. A printer characterized in that the paper guide member is provided with a friction reinforcing coating.   6. The printer according to claim 5, wherein the friction reinforcing coating is a ceramic coating. The printer according to claim 1, wherein the contact portion is in the vicinity of a bent portion of the transport path or in the vicinity of a paper discharge port.

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