JP2011161739A - Dot printer, print head of dot printer, and method for repairing print wire of dot printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dot printer, a print head of dot printer and a print wire repairing method of dot printer which reduce the replacement frequency of the print head by individually repairing the print wire whose tip has been worn. <P>SOLUTION: The dot printer includes the print head B equipped with a print wire driving part 3 for sliding the print wire 1 and a print wire adjustment part 6 for adjusting the tip position of the print wire 1, and a head cleaning part for grinding the tip 1a of each print wire 1 to repair the tip 1a of the print wire 1. The print wire driving part 3 includes the print wire 1, an armature 8 provided in an undulating manner and joined to the print wire 1, and a solenoid part 7 for making the armature 8 undulated. The position of the tip 1a of print wire 1 is adjusted by the print wire adjustment part 6 with adjusting the position of armature 8. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a dot printer, a print head of the dot printer, and a print wire repair method of the dot printer.

  2. Description of the Related Art Conventionally, dot printers (dot impact printers) are configured to include a head (print head) on which a plurality of wires (print wires, pins) are mounted, and a platen provided to face the head. The head includes a plurality of wires, a solenoid (solenoid part), a yoke that holds the solenoid, a plurality of armor chairs that are connected to each other, are attracted to the yoke by a magnet, and are undulated. A return spring provided to urge the armor chair in the direction opposite to the magnet attracting direction, a wire guide that slidably supports the intermediate side of each wire, and a wire guide provided on the end side of the head. And a main guide that slidably supports the tip side.

  In this dot printer, when a control signal (head movement signal and print data signal) is output from the printer control unit, the head moves in the left-right direction, a current flows through the solenoid of the head, and the armchair falls by receiving electromagnetic force. The wire is slid and the tip of the wire is pushed out from the main guide (jumps out from the end of the head). Then, the recording paper is stamped by hitting the recording paper through an ink ribbon disposed between the head and the platen (for example, Patent Document 1, Patent Document 2, Patent Document 3, Patent Reference 4).

JP-A-4-2216545 JP-A-63-290777 Japanese Utility Model Publication No. 61-122841 Japanese Utility Model Publication No. 62-150146

  However, in the conventional dot printer, since the wire 1 slides and strikes the recording paper through the ink ribbon, the tip 1a of the wire 1 is gradually used with use as shown in FIGS. Wear out. At this time, for example, in the case of imprinting characters on the recording paper, the frequency of use of each wire 1 is averaged, and the wear of the plurality of wires 1 progresses at approximately the same level, but when ruled lines are imprinted. The frequency of use of some of the wires 1 increases, and the degree of wear of each wire 1 varies.

  And since it is not possible to replace each of the plurality of wires 1 or to adjust the position of the tip 1a, even if one of the plurality of wires 1 is worn and reaches the end of its life, In spite of the fact that there is no great wear at the tip 1a of the other wire 1, it is necessary to replace the set of heads because the overall print quality cannot be ensured. For this reason, there is a problem that the head is replaced every time the wire 1 is worn and the service life is reached, and the replacement frequency of the head is high, which increases the cost burden on the user (printer handler).

  SUMMARY OF THE INVENTION In view of the above circumstances, the present invention provides a dot printer, a print head of a dot printer, and a print wire repair of a dot printer that can individually repair printed wires with wear at the tip to reduce the frequency of print head replacement. It aims to provide a method.

  In order to achieve the above object, the present invention provides the following means.

  The dot printer of the present invention is a dot printer in which a plurality of print wires provided in a print head slide, and the tip of the print wire strikes a recording sheet via an ink ribbon and imprints on the recording sheet, The print head including a print wire driving unit that slides the print wire and a print wire adjustment unit that adjusts the tip position of the print wire, and for repairing the tip of the print wire by polishing the tip of each print wire A head cleaning unit, and the printed wire drive unit includes the printed wire, an armor chair provided so as to be undulated by joining the printed wire, and a solenoid unit for raising and lowering the armor chair. And the printed wire adjustment unit is Characterized in that it is configured to adjust the position of the chair to adjust the position of the tip of the print wire.

  In the dot printer of the present invention, the print wire drive unit includes the armature chair and the solenoid unit connected by a base member, and the print wire adjustment unit includes a shaft and the shaft that are screwed and connected to the solenoid unit. A rotating means for rotating around an axis, and adjusting the position of the armature chair via the base member while adjusting the position of the solenoid part by rotating the shaft by the rotating means, It is desirable to be configured to adjust the position of the tip of the printed wire.

  The print head of the dot printer of the present invention is a print head of a dot printer in which a plurality of print wires slide, and the tip of the print wire strikes the recording paper via an ink ribbon and imprints on the recording paper, A printed wire driving unit that slides the printed wire; and a printed wire adjusting unit that adjusts a tip position of the printed wire. The printed wire driving unit is undulated by joining the printed wire and the printed wire. An armor chair provided freely and a solenoid unit for raising and lowering the armor chair are configured, and the printed wire adjusting unit adjusts the position of the armor chair to adjust the position of the tip of the printed wire. It is comprised by these.

  In the print head of the dot printer according to the present invention, the arm of the print wire driving unit is connected to the solenoid unit by a base member, and the print wire adjusting unit is screwed to the solenoid unit. A rotation means for rotating the shaft around an axis, and adjusting the position of the solenoid unit and rotating the position of the armature chair via the base member by rotating the shaft by the rotation means. It is desirable to adjust and adjust the position of the tip of the printed wire.

  In the dot printer print wire repairing method of the present invention, a plurality of print wires provided on a print head slide, and dots printed on the recording paper by the tip of the print wire hitting the recording paper via an ink ribbon A method for repairing a tip of a printed wire worn by a printer, wherein the dot printer is the dot printer according to claim 1 or 2, wherein the printed wire has a tip worn by the print wire adjusting unit. Is projected to the outside from the end of the print head, and the tip of the printed wire that has been worn is polished and repaired by the head cleaning unit.

  In the printed wire repair method for a dot printer according to the present invention, test printing is performed in which ruled lines are imprinted on the recording paper using all the printed wires, and each printed wire separately imprinted on the test print is printed. It is desirable to identify the worn printed wire by comparing the number with the presence or absence of the ruled line at the position corresponding to the number.

  According to the dot printer, the print head of the dot printer, and the print wire repair method of the dot printer of the present invention, the tips of the plurality of print wires can be repaired individually. For this reason, it is not necessary to replace the print head every time the printed wire is worn and the life is reached as in the prior art, and the life of the print head can be extended. As a result, the printhead replacement frequency can be reduced compared to the conventional case, and the burden on the user can be reduced.

1 is a perspective view showing a dot printer according to an embodiment of the present invention. 1 is a side sectional view showing a print head according to an embodiment of the present invention. It is a flowchart which shows the repair method (restoration operation | movement) of the printed wire which concerns on one Embodiment of this invention. FIG. 5 is a diagram illustrating an example of the stamp content (description content) of a recording sheet obtained by executing test printing in the printed wire repair method according to the embodiment of the present invention. It is a figure which shows the front-end | tip of a new printed wire, and the front-end | tip of a worn printed wire.

[First embodiment]
Hereinafter, with reference to FIGS. 1 to 4, a dot printer according to an embodiment of the present invention, a print head arrangement of the dot printer, and a print wire repair method for the dot printer will be described.

  As shown in FIG. 1, the dot printer A according to this embodiment includes a head (print head) B and a head cleaning unit 2. In addition, the printer includes a printer control unit, an operation panel unit, a drive unit, an ink ribbon, and the like. Note that the printer control unit, the operation panel unit, the drive unit, the ink ribbon, and the like are the same constituent elements as those of a conventionally known dot printer, and thus description thereof is omitted.

  As shown in FIG. 2, the head B of the present embodiment adjusts the positions of a plurality of printed wire drive units 3, wire guides 4, main guides 5, and tips 1 a of wires (printed wires) 1 one by one. And a plurality of printed wire adjusting sections 6. In FIG. 2, only the configuration of one set of the print wire drive unit 3 and the print wire adjustment unit 6 among the plurality of print wire drive units 3 and print wire adjustment units 6 is shown.

  The printed wire driving unit 3 corresponds to one dot in one set (corresponds to one wire 1 in one set), the wire 1, the solenoid unit 7, the yoke holding the solenoid unit 7, and the wire 1 Are provided, and an armor chair 8 provided so as to be able to move up and down while being attracted to the yoke by a magnet, and a return spring 9 provided to urge the armor chair 8 in a direction opposite to the attracting direction by the magnet. . Further, the armor chair 8 and the solenoid portion 7 are connected by a base member 10.

  The wire guide 4 corresponds to a plurality of wires 1 by a set of wire guides 4 and supports the middle part of the plurality of wires 1 so as to be slidable. Each wire 1 is positioned at the center of the head B. In this way, a mechanism for guiding is provided.

  The main guide 5 corresponds to a plurality of wires 1 by a single main guide 5 and supports the ends 1a of the plurality of wires 1 so as to be slidable. 1 is configured to have a mechanism for holding it in a distributed arrangement.

  In the print wire driving unit 3 having the above-described configuration, when a control signal (a head movement signal and a print data signal) is output from the printer control unit, a current flows through the solenoid unit 7 and the solenoid unit 7 is excited. As a result, the armor chair 8 falls to the end side of the head B. When the armor chair 8 falls down in this way, the tip 1a side of the wire 1 connected to the armor chair 8 jumps out from the end of the main guide 5 toward the platen (projects outward from the end of the head B), and between the platen and the head B. One dot is imprinted on the recording paper via the ink ribbon arranged on the recording medium. When the current flowing through the solenoid unit 7 is stopped by the control signal from the printer control unit, the armor chair 8 is raised by the urging force of the return spring 9 to return to the initial state (initial position), and together with this, the main guide 5 The tip 1a side of the wire 1 protruding from the end of the wire 1 also returns to the initial state (initial position).

  On the other hand, the printed wire adjusting unit 6 corresponds to one set of the printed wire driving unit 3 and is a mechanism for adjusting the positions of the tips 1a of the plurality of wires 1 one by one. A DC motor (rotating means) 11 And a shaft 12 that rotates around the axis O <b> 1 by driving the DC motor 11. The shaft 12 is provided with a male screw threaded on the outer periphery thereof and screwed into the solenoid portion 7.

  As shown in FIG. 1, the head cleaning unit 2 is for polishing the tip 1 a of the worn wire 1 and shaping it into a required shape, and has sufficient hardness to polish the material forming the wire 1. A plate-like member 2a whose surface is processed into a file shape, for example, is made of a material that has been held.

  In the dot printer A (and head B) of the present embodiment having the above-described configuration, the tip 1a of the wire 1 is worn as shown in FIG. 5B, and the tip 1a of the wire 1 extends from the end of the main guide 5. When the print quality on the recording paper can no longer be ensured due to the fact that the toner does not pop out, the head B is inspected manually or automatically, and the worn wire 1 is specified.

  When the worn tip 1 a of the wire 1 is repaired, a control signal is output from the printer control unit by a button operation or the like, and the DC motor 11 of the print wire adjustment unit 6 is driven. Then, when the DC motor 11 is driven, the shaft 12 is rotated by a required rotation amount, so that the solenoid portion 7 screwed to the shaft 12 moves to the main guide 5 side by a required amount. A printed wire drive unit 3 comprising an armor chair 8 joined on the base (base member 10) of the solenoid unit 7, a return spring 9, and a worn wire 1 joined to the armor chair 8, the solenoid unit 7 The required amount is moved to the main guide 5 side and the required amount is moved to the main guide 5 side, and the relative position to the solenoid unit 7 is maintained. That is, the rotational motion is converted into a linear motion at the joint between the printed wire adjusting unit 6 and the printed wire driving unit 3, and the printed wire driving unit 3 moves to the main guide 5 side by a predetermined amount. As a result, the tip 1a side of the worn wire 1 protrudes (projects) from the end of the main guide 5 by a required amount.

  Here, in this embodiment, a required amount for moving the solenoid portion 7, the armor chair 8, etc. to the main guide 5 side, and a required amount for causing the tip 1 a side of the worn wire 1 to protrude from the end of the main guide 5 is, for example, 2 mm. And the rotation amount of the shaft 12 rotated by driving the DC motor 11 is set to a rotation amount corresponding to this. Note that the amount of movement (the amount of rotation of the shaft 12) may be appropriately set depending on the type of the head B. Therefore, the required amount for moving the printed wire driving unit 3 and the required amount for protruding the wire 1 are set in advance according to the type of the head B.

  Further, the tip 1a of the wire 1 is protruded by a required amount as described above, and the head B is moved to a predetermined position facing the head cleaning unit 2 by driving of the driving unit that receives a control signal from the printer control unit. Then, the head B is reciprocated in the left-right direction T1 by a required amount according to the size of the head cleaning unit 2 (see FIG. 2). When the head B is reciprocated in the left-right direction T1 in this way, the worn tip 1a of the wire 1 is abutted against the filed plate-like member 2a of the head cleaning unit 2 and polished, as shown in FIG. Shaped like a new product.

  At this time, the head B polishes the tip 1a of the wire 1 by reciprocating, for example, five times in a state where the tip 1a of the wire 1 is in contact with the file-shaped plate-like member 2a, and shapes it into a shape similar to a new product. The moving amount (required amount) and the number of reciprocations of the head B are appropriately set according to the type of the head B (material, shape, etc. of the wire 1), the material of the head cleaning unit 2, the surface shape (polishing ability), etc. do it.

  On the other hand, when the wear of the head B is detected manually, for example, as shown in FIG. 3, at the stage (step 1) when the printer operator recognizes a print defect such as print fading, first, the dot printer A Test printing is performed by operating the operation panel (step 2).

  Next, the number of the worn wire 1 is confirmed by looking at the description of the recording paper printed by test printing. Specifically, as shown in FIG. 4, in the test printing, the ruled lines 13 are printed (printed) on the recording paper using all the wires 1, and the number of the wire 1 is printed on the recording paper at the same time. Then, the number of each wire 1 described on the recording paper obtained by executing the test printing is compared with the presence or absence of the ruled line 13 at the position corresponding to this number to identify the worn wire 1 (step 3). .

  Next, as shown in FIG. 3, the ink ribbon is removed (step 4), and the operation panel is operated to move the head B to the head cleaning unit 2 (step 5). Then, the DC motor 11 is driven to cause the tip 1a of the wire 1 whose wear has been confirmed by test printing to protrude from the end of the head B by a required amount, and the tip 1a of the wire 1 is polished by the head cleaning unit 2 (step 6). ). Thereby, the front-end | tip 1a of the worn wire 1 is shaped in the shape like a new article. Then, an ink ribbon is attached (step 7), and finally test printing is executed by the operation panel (step 8), and it is confirmed that printing is normally performed by looking at the description on the recording paper.

  Therefore, in the dot printer A, the print head B of the dot printer, and the print wire repair method of the dot printer of this embodiment, the dot printer A includes the head B and the head cleaning unit 2, and the head B is the print wire driving unit. 3 and the printed wire adjustment section 6 that adjusts the position of the tip 1a of the wire 1 one by one, it is possible to individually shape (repair) the tip 1a of the worn wire 1.

  Further, at this time, test printing is performed when the printer operator recognizes a print defect such as print fading and the description of the recording paper on which the number of the wire 1 and the ruled line 13 corresponding to the wire 1 are printed. The state of the wire 1 can be confirmed by the presence or absence of defects, and the worn wire 1 can be easily identified.

  As a result, according to the dot printer A, the print head B of the dot printer, and the print wire repair method of the dot printer of the present embodiment, the tips 1a of the plurality of wires 1 can be individually repaired, as in the past. It is not necessary to replace the head B every time the wire 1 is worn and reaches the end of its life, and it is possible to extend the life of the head B. Therefore, it is possible to reduce the replacement frequency of the head B and reduce the cost burden on the user.

  As mentioned above, although one embodiment of the dot printer, the print head of the dot printer, and the print wire repair method of the dot printer according to the present invention has been described, the present invention is not limited to the above embodiment, and departs from the gist thereof. It is possible to change appropriately within the range not to be.

1 Wire (Printed wire)
DESCRIPTION OF SYMBOLS 1a Tip 2 Head cleaning part 2a File-like plate-like member 3 Printed wire drive part 4 Wire guide 5 Main guide 6 Printed wire adjustment part 7 Solenoid part 8 Armor chair 9 Return spring 10 Base (base member)
11 DC motor (rotating means)
12 Shaft 13 Ruled Line A Dot Printer B Head (Print Head)
O1 Shaft axis T1 Left-right direction

Claims (6)

A plurality of print wires provided on the print head each slide, and the tip of the print wire strikes a recording paper via an ink ribbon to print on the recording paper,
The print head including a print wire driving unit that slides the print wire and a print wire adjustment unit that adjusts the tip position of the print wire, and for repairing the tip of the print wire by polishing the tip of each print wire A head cleaning unit,
The printed wire drive unit is configured to include the printed wire, an armor chair provided so that the printed wire can be raised and lowered, and a solenoid unit for raising and lowering the armor chair,
The dot printer, wherein the printed wire adjusting unit is configured to adjust the position of the tip of the printed wire by adjusting the position of the armature. The dot printer according to claim 1.
In the printed wire drive unit, the armor chair and the solenoid unit are connected by a base member,
The printed wire adjustment unit includes a shaft that is screwed into the solenoid unit and a rotation unit that rotates the shaft around an axis.
By rotating the shaft by the rotating means, the position of the solenoid portion is adjusted, and the position of the armchair is adjusted via the base member to adjust the position of the tip of the printed wire. A dot printer characterized by that. A print head of a dot printer in which a plurality of print wires slide, and a tip of the print wire strikes a recording paper via an ink ribbon and imprints on the recording paper,
A printed wire driving unit that slides the printed wire and a printed wire adjusting unit that adjusts the tip position of the printed wire;
The printed wire drive unit is configured to include the printed wire, an armor chair provided so that the printed wire can be raised and lowered, and a solenoid unit for raising and lowering the armor chair,
A print head of a dot printer, wherein the print wire adjustment unit is configured to adjust the position of the tip of the print wire by adjusting the position of the armature. The print head of the dot printer according to claim 3,
In the printed wire drive unit, the armor chair and the solenoid unit are connected by a base member,
The printed wire adjustment unit includes a shaft that is screwed into the solenoid unit and a rotation unit that rotates the shaft around an axis.
By rotating the shaft by the rotating means, the position of the solenoid portion is adjusted, and the position of the armchair is adjusted via the base member to adjust the position of the tip of the printed wire. The print head of a dot printer, characterized by A plurality of print wires provided on the print head slide, and the tip of the print wire hits the recording paper through the ink ribbon to imprint on the recording paper. A method,
The dot printer is the dot printer according to claim 1 or 2,
The print wire adjusting unit causes the print wire with a worn tip to protrude outward from the end of the print head by a required amount,
A method of repairing a printed wire of a dot printer, wherein the head cleaning unit polishes the tip of the worn print wire to repair the tip. The printed wire repair method for a dot printer according to claim 5,
Test printing is performed in which ruled lines are imprinted on the recording paper using all the printed wires, and the number of each printed wire separately imprinted on the test printing and the presence or absence of the ruled line at a position corresponding to the number A printed wire repairing method for a dot printer, characterized by identifying the worn printed wire by comparing

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