JP3659267B2 - Printing apparatus and control method thereof - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a printing apparatus capable of printing single-sheet printing paper such as form paper and a control method thereof.
[0002]
[Prior art]
Printers having various functions have been developed, and various types of paper are printed. In recent years, printers that can perform journal printing using roll paper and at the same time perform validation printing for authentication on form paper and slip printing for printing on various single paper sheets have appeared.
[0003]
A printer having a validation printing function for performing authentication or the like on a form sheet composed of a plurality of single sheet forms is mainly a dot printer capable of overprinting. In this type, printing paper is fed into a platen gap, which is a gap between the printing platen and the printing head, and printing is performed using the printing head and an ink ribbon inserted between the printing head and the printing paper on the printing paper. I do.
[0004]
[Problems to be solved by the invention]
In such a printer, in order to improve the printing speed, the platen gap is narrowed to increase the responsiveness of the print head. Further, in order to suppress the printing sound caused by the resonance of the printing paper from the platen, a mask plate is inserted between the ink ribbon and the printing paper, and the printing paper is pressed against the platen by the mask plate. Further, this mask plate also functions to prevent interference between the printing paper and the ink ribbon during printing. In particular, when validation printing is performed by inserting a large number of printing papers into the platen gap, the mask plate is important in terms of preventing printing paper from becoming dirty due to interference with the ink ribbon and printing defects due to pressing down of the ink ribbon. is there.
[0005]
However, when the platen gap is narrowed, the printing paper, the mask plate, and the ink ribbon exist in the narrow space. For this reason, when inserting a sheet for validation printing, it is easy to cause a trouble that the sheet is inserted between the mask plate and the print head instead of being inserted between the mask plate and the platen. Also, when the ink ribbon is attached / detached, it becomes difficult for the ink ribbon to come off, or when replacing the ribbon cassette, the ink ribbon is not set between the mask plate and the print head, but is set incorrectly between the mask plate and the platen. The trouble that will end up also occurs.
[0006]
Therefore, the present invention provides a printing apparatus that is low in noise, can easily set and align forms when printing forms such as validation printing, and does not contaminate forms or cause printing errors. The purpose is that. Another object of the present invention is to provide a printing apparatus that can eliminate waste due to mistakes in printing paper such as forms and wasteful working time. It is another object of the present invention to provide a printing apparatus in which the user can easily replace the ink ribbon, thereby preventing the printing paper from being soiled or causing printing errors. It is also an object of the present invention to provide a control method suitable for such a printing apparatus.
[0007]
[Means for Solving the Problems]
The printing apparatus of the present invention employs a mask plate that can prevent interference between the printing paper and the ink ribbon, and can reduce the printing sound by pressing the printing paper against the platen. When the printing paper is inserted between the platen and the print head, or when the ink ribbon is replaced, the distance between the mask plate and the print head is controlled so that the mask plate and the platen or the platen enters and exits the paper guide. Controls the distance between the mask plate and the paper guide. That is, the printing apparatus of the present invention includes a print head that performs printing while moving to a printing paper set on a platen, and a mask plate that can move together with the printing head and press the printing paper from the printing head side to the platen. When the printing paper is inserted between the platen and the printing head, it has a mask guide for setting a gap between the mask plate and the printing head to be narrow. Even in a printing device with a narrow platen gap, if the gap between the mask plate and the print head is narrowed when setting the printing paper and the gap between the mask plate and the platen or paper guide is widened, the printing paper is aligned. And insertion is simplified, and resistance when inserting printing paper is reduced. For this reason, there are no setting mistakes in which the printing paper is set to be inclined, and troubles such as printing defects caused by this can be prevented. In addition, by narrowing the gap between the mask plate and the print head, printing paper is not accidentally inserted between them, preventing problems caused by interference between the ink ribbon and the printing paper, and pressing down of the ink ribbon. it can. On the other hand, when the printing paper is not inserted, there is no need to set the gap between the mask plate and the print head narrow, so the gap between the mask plate and the print head can be set wide, and the ink ribbon can be easily replaced.
[0008]
If the mask guide can be linked with the movement of the print head so that the distance between the mask plate and the print head can be set, the distance between the mask plate and the print head can be controlled just by controlling the movement of the print head. The spacing of the platen or paper guide can also be controlled. As such a mask guide, a mask provided with a guide part capable of contacting at least a part of the mask plate can be adopted. The mask plate is provided with an elastic portion that moves together with the print head and extends from the print head side to press the printing paper to the platen side, and a lead portion that extends from the elastic portion. The gap between the elastic part and the print head can be controlled by guiding it while making contact with the part. The lead portion may be guided along the shape of the guide portion, for example, along the edge of the guide portion, or the lead portion may be guided by providing a groove or a cam. In any case, if the guide portion can regulate the width of the lead portion that swings depending on the position of the print head, the gap between the elastic portion of the mask plate and the print head and the gap between the mask plate and the platen or the paper guide can be freely controlled. As the elastic portion of the mask plate, a plate spring-like one extending from the print head side or a coil spring with a restraining plate added can be employed.
[0009]
When the guide part is arranged on the print head side with respect to the mask plate, the guide part is provided at one end of the print area where the print head can be moved, and when the mask plate moves to the end side together with the print head. It is desirable that the guide portion and a part of the mask plate are in contact with each other. In this case, the mask plate and the print head can be moved by moving the print head to the end if the elastic portion can be drawn toward the print head as the lead portion goes to the end of the print area along the guide portion. The interval between the mask plate and the platen or paper guide can be narrowed, and the printing paper can be set with almost no resistance. If the guide portion is provided on the end side, the guide portion can be easily supported, and the guide portion does not get in the way when the ink ribbon is replaced. In addition, since a means such as a feed roller for conveying the printing paper is often placed on the end side of the printing area, if the mask plate is on the edge when setting the printing paper, it is combined with these and the printing paper. Can be configured to insert a path.
[0010]
When the guide portion is provided on the platen side with respect to the mask plate, interference with the ink ribbon can be prevented during replacement. However, when the printing paper is cut paper, this cut paper exists between the guide section and the mask plate, so that the guide section and mask are only used when printing is not performed so that resistance during printing does not increase. It is desirable to bring the plates into contact. For example, at least a part of the mask plate and the guide before and after the transition to the standby mode in which the gap between the print head and the platen is increased by the mode changing means capable of adjusting the gap between the print head and the platen in at least two stages. It is desirable to move the print head to a position facing the guide portion so as to contact the portion. As a result, the distance between the mask plate and the print head is narrowed and the space between the mask plate and the platen or paper guide is widened, so that the printing paper can be set smoothly.
[0011]
When the platen gap is changed by such mode changing means, the guide portion is also provided with a portion for setting a wide gap between the print head and the mask plate so that the ink ribbon can be easily exchanged and set in a short time. It is effective to keep it. When replacing the ink ribbon, if the gap between the print head and the mask plate is set wide by moving the print head to a position facing the guide portion, the ink ribbon can be easily attached and detached. Therefore, the ink ribbon is not erroneously inserted into the gap.
[0012]
Also, in order to assemble the paper path including the conveying means and make it easier to insert the printing paper, the gap between the mask plate and the print head is set close to the conveying means, and the print head and the mask plate are separated in other portions. It is desirable to set a wide gap. The conveying means is often on the end side of the printing area, and the portion of the guide portion suitable for such a printing apparatus that contacts the mask plate protrudes toward the print head near the conveying means at the end of the printing area. On the other hand, the vicinity of the center has a concave shape on the platen side. By moving the printing head to the end of the printing area and then operating the conveying means, the printing paper can be smoothly set between the platen and the printing head and printing can be started. When the ink ribbon is replaced, the print head may be moved to the vicinity of the center of the printable area.
[0013]
In a printing apparatus that handles printing paper that is not stored in the printing apparatus as roll paper, such as single-sheet printing paper, an operation of setting the printing paper between the platen and the print head is frequently performed. Therefore, as described above, the gap between the mask plate and the print head is controlled, and the gap between the mask plate and the platen or paper guide is controlled to reduce printing defects and paper contamination, enabling efficient and reliable printing. As a result, it is possible to greatly reduce waste of printing paper consumption and time required for re-printing.
[0014]
Further, it can be used as a paper presser that guides the printing paper onto the platen by moving the mask plate to a predetermined position. For example, in the same manner as described above, in addition to the first printing port that can feed and discharge the sheet-like printing paper while adjusting the gap between the mask plates, the first printing port communicates with the platen interposed therebetween. In the printing apparatus capable of feeding another single-sheet-like printing paper from the opposite side by the second printing port, a guide portion is provided when setting the single-sheet-like printing paper to the second printing port. The print head can be moved to a predetermined position that does not reach the width of the cut sheet-shaped printing paper on the side opposite to the end. As a result, of the single-sheet paper sent between the platen and the print head, the side opposite to the end with the guide portion can be pressed onto the platen or the paper guide by the mask plate, and the first printing port The cut sheet can be smoothly fed along a predetermined route.
[0015]
Thus, in the printing apparatus according to the present invention, the gap between the mask plate and the print head and the gap between the mask plate and the platen or the mask plate and the paper guide can be easily controlled by changing the position of the print head. Is possible. Therefore, it is possible to add various functions to the mask plate, such as holding the other end of the printing paper with the mask plate, depending on the type of cut sheet and the conditions such as the printing port to be inserted. Various troubles can be solved.
[0016]
【Example】
(Example 1)
Embodiments of the present invention will be described below with reference to the drawings.
[0017]
Schematic configuration of printer
FIG. 1 shows an outline of a printer 1 according to the first embodiment of the present invention. The printer 1 of the present example includes a substantially rectangular parallelepiped body 2 that is slightly longer in the direction in which the roll paper 11 is fed, and stores the roll paper 11 at one end thereof. A head unit 21 that moves in a direction crossing the roll paper 11 along the carriage guide shaft 20 is provided on the opposite side of the body 2 from the end on which the roll paper 11 is stored. The head unit 21 is supported on the carriage guide shafts 20 and 20a, and is mounted on a carriage unit 22 that can be moved to a predetermined position in a printing area along the carriage guide shaft 20 by a timing belt (not shown). From the head unit 21, a printer head 23 that performs printing in a dot format is projected at a position facing the roll paper 11. A ribbon case 30 is mounted behind the head unit 21, that is, on the side opposite to the roll paper 11 with respect to the head unit 21. An ink ribbon 31 extends from the ribbon case 30 to both sides 2 a and 2 b of the body 2 in the vicinity of the roll paper 11 and crosses the roll paper 11 along the carriage guide shaft 20. The ink ribbon 31 extends between the printer head 23 and the roll paper 11 in the direction in which the printer head 23 moves. The ink ribbon 31 is gradually wound up by a mechanism inside the printer in response to the movement of the printer head 23, and can be printed by printing with the wire dots of the printer head 23 using a new portion of the ink ribbon 31. It has become.
[0018]
A mask plate 40 extending from the carriage unit 22 toward the printer head 23 is prepared between the ink ribbon 31 and the roll paper 11.
[0019]
The printer 1 of this example includes a paper guide 4 extending in a direction crossing the body 2, and the paper guide 4 and the head unit 21 face each other with the roll paper 11 interposed therebetween. The paper guide 4 has a substantially U-shaped cross section that extends in the vertical direction, and an opening 4a into which the platen 5 can be inserted and removed is formed at the approximate center. If printing paper is set on the side of the paper guide 4 facing the printer head 23, the platen 5 protrudes from the back side of the printing paper when printing is performed. It can be supported.
[0020]
In the printer 1 of this example, above the paper guide 4 and in the direction in which the roll paper 11 is fed, a mask guide 50 that contacts the lead portion 45 that contacts the tip of the mask plate 40 and a cutter 6 that cuts the roll paper. And these extend from one side 2a of the body 2 to the other side 2b. Further, the roller shaft 26 is passed from the left side 2a to the right side 2b above the mask guide 50, and rollers 25a and 25b are mounted on both sides 2a and 2b of the shaft 26. This shaft 26 is connected to a feed motor for paper feeding (not shown) via a belt 24 on the right side 2b of the body 2.
[0021]
Further, the printer 1 of the present example includes a cover 3 that is mounted on the body 2 so as to be able to turn, above the head unit 21 and the ribbon case 30. Further, a shaft 28 is passed over the head unit 21, and rollers 27 a and 27 b are mounted on both sides 2 a and 2 b of the shaft 28. A single sheet such as a form (validation sheet) 12 for validation printing is sandwiched and conveyed by the roller 27 and the roller 25 facing each other. The validation paper is usually composed of a plurality of forms, and in the validation printing, authentication printing is collectively performed on these.
[0022]
Further, a curved lower paper guide 7 is provided below the head unit 21, and a laterally extending form (slip paper) 13 can be inserted through a gap between the lower paper guide 7 and the body 2. It is like that. As described above, the printer 1 of this example can execute three types of printing paper and printing method, that is, the roll paper 11, the validation paper 12, and the slip paper 13.
[0023]
FIG. 2 is an enlarged view of the mechanism around the printer head 23 and the paper guide 4 of the printer 1 of this example. Each mechanism shown in FIG. 2 is set to a mode for printing. The printer 1 of this example can set a mode in which printing is performed by the operation of the plunger 8 and a standby mode in which printing paper is fed and discharged and the ink ribbon is replaced. In order to enter the printing mode, first, the arm 9 is pivoted around the fulcrum 9a in the direction of the paper guide 4 by the operation of the plunger 8. As a result, the lower paper feed roller 33 attached to the lower part of the arm 9 comes into contact with the auxiliary roller 34 on the opposite side, thereby constituting the lower paper feed mechanism. The paper feed mechanism for the roll paper 11 is constituted by a roller 36 and an auxiliary roller 35.
[0024]
As shown in FIG. 3, the lever 10 with the upper paper feed roller 25 attached to the tip extends in the vertical direction. When the platen 5 is in the standby mode position by the stopper 16 provided on the arm 9, the lever 10 The rotation around the rotation fulcrum 37 is restricted. In other words, when the printer is in the standby mode, the clockwise rotation of the lever 10 is restricted, so the upper paper feed roller 25 provided at the tip of the lever 10 contacts the auxiliary roller 27 and conveys the printing paper. I can't do it. Further, the lower end portion of the lever 10 is restricted by the lever 18 from rotating clockwise around the rotation fulcrum 37. Therefore, as shown in FIG. 2, the lever 18 is rotated counterclockwise around the rotation fulcrum 18 a by the action of the plunger 19 to be disengaged from the lever 10, and by the action of the plunger 8. When the arm 9 rotates counterclockwise around the rotation fulcrum 9 a and the rotation restriction of the lever 10 by the stopper 16 is released, the lever 10 is moved around the fulcrum 37 in the direction of the printer head 23 by the spring 15. And the upper paper feed roller 25 comes into contact with the auxiliary roller 27 to constitute the upper paper feed mechanism.
[0025]
Further, as the arm 9 pivots in the direction of the paper guide 4, the platen 5 protruding from the arm 9 toward the printer head 23 protrudes from the opening 4 a of the paper guide 4 toward the printer head 23. Then, the back side of the printing paper is pushed up toward the printer head 23.
[0026]
As described above, in the printer 1 of this example, each paper feed mechanism can be configured by the plunger 8 when the print mode is set, and the back side of the print paper can be reliably supported by the platen 5. The roll paper 11 for journal printing can be fed by a paper feed mechanism constituted by rollers 35 and 36. Further, the validation paper 12 inserted from the upper part of the printer 1 or the slip paper 13 inserted from the lower part is an upper paper feed mechanism constituted by rollers 25 and 27 and a lower paper feed constituted by rollers 33 and 34. The mechanism can feed to a predetermined printing position.
[0027]
By the operation of the plunger 8, the platen 5 protrudes from the paper guide 4, and the platen gap G that is a gap between the platen 5 and the printer head 23 becomes narrow. In the platen gap G, printing paper, a mask plate 40, and an ink ribbon 31 are placed in this order from the platen 5 side. The mask plate 40 of this example is composed of a thin metal plate 41, and a lower portion 42 of the mask plate 40 is gently bent and attached to the carriage unit 22. Further, a substantially diamond-shaped opening 44 extending vertically is formed in the upper portion 43 of the metal plate 41. The ink ribbon 31 can be engraved on the printing paper by the printer head 23 through the opening 44. The metal plate 41 further extends upward from the upper portion 43 to form a lead portion 45. The lead portion 45 is bent in the direction from the paper guide 4 to the printer head 23 and is open above the printer 1, that is, in the direction in which the validation paper 12 is inserted. The mask plate 40 is a thin metal plate, bends gently with the carriage unit 23, and is inclined toward the platen 5. Therefore, the metal plate 41 is elastic and the upper portion 43 presses the platen 5. In this way, the printing paper can be brought into close contact with the platen 5 by the mask plate 40.
[0028]
When the mask plate 40 is thus provided between the ink ribbon 31 and the printing paper, interference between the printing paper and the ink ribbon 31 can be prevented. Accordingly, when setting the printing paper or feeding the paper, the ink ribbon 31 comes into contact and gets dirty, or the ink ribbon 31 is displaced from a predetermined position by feeding the paper, thereby preventing a trouble that causes printing failure. it can. For this reason, high-quality printing can be performed at high speed.
[0029]
Further, if such a mask plate 40 is used, the printing paper can be pressed against the platen 5, so that the printing paper can be prevented from fluttering during printing, and the noise generated during printing can be suppressed. In particular, when printing a plurality of printing papers such as the validation paper 12, a plurality of printing papers can be held together, so that noise can be suppressed and the printing quality of the overlapping printing papers can be improved. it can. Further, in the printer that prints one roll paper 11 in addition to the validation paper 12 as in this example, the mask paper 40 having elasticity is used, so that the printing paper can be reliably obtained regardless of the thickness of the printing paper. There is also an advantage that it can be held on the platen. Therefore, it is possible to perform high quality printing on printing papers of different types and different thicknesses.
[0030]
FIG. 3 shows an enlarged view of the mechanism around the printer head 23 and the paper guide 4 of the printer 1 of this example in the standby mode in which the validation paper 12 or the slip paper 13 is attached to the paper guide 4. In this standby mode, the plunger 9 turns the arm 9 around the fulcrum 9a in a direction away from the paper guide 4. The arm 9 may be pivotally driven in a direction away from the paper guide 4 by the plunger 8, and the arm 9 may be pivoted by the force of the spring 14 with the plunger 8 in a non-excited state as in this example. When the arm 9 turns in a direction away from the paper guide 4, the lower paper feed roller 33 moves away from the auxiliary roller 34. Further, since the lever 10 is also pivoted in the direction away from the printer head 23 by the stopper 16 of the arm 9, the upper paper feed roller 25 is separated from the auxiliary roller 27. At this time, if the arm 9 is turned by the spring 14, it is necessary to increase the force of turning the arm 9 by the spring 14 as compared with the spring 15 turning the lever 10.
[0031]
Further, when the arm 9 turns in a direction away from the paper guide 4, the platen 5 joined to the arm 9 is retracted from the opening 4 a of the paper guide 4. As a result, the space between the printer head 23 and the platen 5 is widened, and a gap W between the printer head 23 and the paper guide 4 can be secured on the printing paper side of the printer head 23. Further, when the platen 5 is drawn into the paper guide 4, the elastic mask plate 40 pressed against the platen 5 turns in the direction of the paper guide 4 and the inclination angle changes. Then, the guide portion 51 of the mask guide 50 prepared on the upper portion of the paper guide 4 and the lead portion 45 of the mask plate are in contact with each other. For this reason, the upper portion 43 of the mask plate 40 does not reach the surface of the paper guide 4, and a gap X can be secured between the mask plate 40 and the paper guide 4.
[0032]
FIG. 4 shows a state of the mask guide 50 and the mask plate 40 that moves along the guide portion 51 of the mask guide 50. The mask guide 50 is a plate-like member extending from both ends 2 a to 2 b of the printer 1, and the side of the mask head 50 on the printer head 23 serves as a guide portion 51 that guides the lead portion 45 of the mask plate 40. The guide portion 51 is a portion 52 that protrudes toward the printer head 23 on both sides 2a and 2b, and a central portion is a portion 53 that is recessed with respect to the printer head 23 side. The mask guide 50 is mounted on the printer 1 such that the protruding portion 52 of the guide portion 51 is inclined downward toward the printer head 23.
[0033]
The state shown in FIG. 3 shows a state in which the printer head 23 moves in either direction 2a or 2b of the printer 1 and is positioned below the upper paper feed roller 25a or 25b. For example, considering the state in which the printer head 23 has moved below the paper feed roller 25b, the printer is in a standby mode by the movement of the plunger 8, so the paper feed roller 25b and the auxiliary roller at the top of the mask plate 40 27b has a slight gap and is separated from each other. The mask plate 40 is located under the roller 27b, and the lead portion 45 is in contact with the protruding portion 52 of the mask guide 50 and away from the paper guide 4, so that the leading end of the lead portion 45 of the mask plate 40 is at the roller 27b. Become under. Accordingly, since the leading end of the lead portion 45 of the mask plate 40 is hidden by the roller 27b with respect to the inserted paper, the paper is not erroneously inserted between the mask plate 40 and the printer head 23. Absent. Further, in this example, the lead portion 45 is in contact with the protruding portion 52 of the guide portion in an open state so that the validation paper 12 can be easily received. Further, the protruding portion 52 of the guide portion and the lead portion 45 are in contact with each other, but the shape is such that the sheet can be easily received from above as described above, and the lead portion 45 is formed by the elasticity of the metal plate 41. Since the sheet is only pressed by the protrusion 52, when inserting a recording sheet having a certain thickness, such as the validation sheet 12, and thus having a certain degree of rigidity, the guide portion is preferably opened while pushing the lead portion 45 open. It is possible to smoothly pass between the protruding portion 52 and the protruding portion 52. Therefore, even when the lead portion 45 is in contact with the protruding portion 52, it passes between the paper feed rollers 25 b and 27 b and passes through the contact portion between the lead portion 45 of the mask plate and the protruding portion 52 of the mask guide 50. The insertion path of the validation paper 12 can be configured.
[0034]
If the user inserts the validation paper 12 between the rollers 25b and 27b, the validation paper 12 passes between the rollers 25b and 27b, and the lead portion 45 of the mask plate and the protruding portion 52 of the mask guide 50 Can automatically lead to the contact part of Then, the validation paper 12 is guided to a predetermined position between the mask plate 40 and the paper guide 4 through this contact portion. Since a plurality of single sheets overlap each other, the end of the validation sheet 12 is not always integrated. However, by passing between these rollers 25b and 27b to the lead portion opened upward and the protruding portion 52, all the forms constituting the validation paper 12 can be smoothly transferred to the paper guide 4 and the mask plate 40. Can be inserted between. In addition, since a relatively wide gap X is secured between the paper guide 4 and the mask plate 40, the validation paper 12 may interfere with the mask plate 40 or the paper guide 4 when the validation paper 12 is mounted. Nor. Since the mask plate 40 is stopped by the mask guide 50, the validation paper 12 is not unnecessarily pressed against the paper guide 4. Therefore, no jamming occurs when the validation paper 12 is inserted, and the validation paper 12 is not damaged.
[0035]
Further, since the lead portion 45 of the mask plate 40 opens toward the printer head 23 and is scooped, a part of the form constituting the validation paper 12 enters between the mask plate 40 and the ink ribbon 31. Can prevent troubles. Further, since there is a mask plate 40 between the ink ribbon 31 and the validation paper 12, the ink ribbon and the validation paper 12 do not interfere with each other when inserted, and the validation paper 12 is not soiled. Further, the ink ribbon 31 is not displaced by the inserted validation sheet 12. Thus, in the printer of this example, the user can easily attach the validation paper 12 to the printer without any concern.
[0036]
After mounting the validation paper 12 and returning to the printing mode as shown in FIG. 2, the mask plate 40 and the validation paper 12 are moved by the platen 5. But Pushed up. Therefore, the lead portion 45 of the mask plate 40 is disengaged from the mask guide 50, and the validation paper 12 can be reliably set on the platen 5 using the mask plate 40, so that clean printing can be performed.
[0037]
Since the validation sheet 12 is generally narrow and has a narrow printing area, one end of the printing sheet is inserted with one end of the sheet insertion slot aligned. In this example, one end of the printing paper is aligned with the paper feed roller 25b. Therefore, in order to reliably transport the validation paper 12, it is desirable that the paper feed roller 25b is provided close to the end of the paper insertion slot. When inserting the validation paper 12, the printer head 23 is moved to the paper. The lead part 45 of the mask plate 40 is moved under the feed roller 25 b and held at a position away from the paper guide 4 by the protruding part 52 of the mask guide 50.
[0038]
On the other hand, the slip paper 13 to be inserted from the lower side of the printer 1 may be one wide and the print area may be widened, so in this example on the side opposite to the side on which the side edge of the print paper can be guided. The mask plate 40 is moved to the paper feed roller 25a side to prevent variations when the slip paper 13 is mounted. In addition, since the lower part 42 for attaching the mask plate 40 to the carriage unit 22 is gently bent, it also serves as a scoop for guiding the slip paper 13 inserted from below to the paper guide 4.
[0039]
When inserting the slip sheet 13 from the lower part of the printer, first, the tip of the slip sheet 13 is inserted to a position slightly below the lead portion of the mask plate 40 by a paper feed mechanism provided in the auxiliary guide 7. That is, since the length of a path from a paper insertion detector (not shown) provided at a predetermined position of the auxiliary guide 7 to the mask guide 50 through the paper guide 4 and the platen 5 is known, the paper feed mechanism is controlled. When the leading edge of the slip sheet 13, that is, the top of the sheet is slightly below the contact point between the lead portion 45 of the mask plate 40 and the mask guide 50, the sheet feeding is stopped. In general, a printer body is provided with a paper stopper, whereby the paper is positioned at a predetermined position, and at the same time, the state is detected by a paper insertion detector.
[0040]
Next, the platen 5 is projected from the paper guide 4 toward the print head by the plunger 8. As a result, the mask plate 40 is in a state of pressing the slip sheet 13 against the platen 5. In this case, the lever 18 is held in a state of being rotated clockwise around the rotation fulcrum 18a by the plunger 19, and is engaged with the lower end of the lever 10 to prohibit its clockwise rotation. Therefore, the upper paper feed roller 25 and the auxiliary roller 27 are not in contact with each other. Since the tip of the slip paper 13 is above the platen 5, the mask plate 40 presses the lower side of the tip of the slip paper 13 against the platen 5. In this state, the slip paper 13 is further fed, and when the leading edge reaches between the paper feed roller 25 and the auxiliary roller 27, the plunger 19 is actuated to release the engagement between the lever 18 and the lever 10 and the paper feed roller. 25 is brought into contact with the auxiliary roller 27. If the slip paper 13 is set using such control, the mask plate 40 and the mask guide 50 are not brought into contact with each other while the leading edge of the slip paper 13 passes through the vicinity of the mask guide 50 and reaches the upper paper feed roller. Therefore, the leading edge of the slip paper does not move away from the mask plate 40, and even if the slip paper 13 is thin, trouble such as paper jam does not occur and the slip paper 13 can be set reliably. Further, after the slip paper 13 reaches the upper paper feed roller 25, the upper paper feed roller 25 and the auxiliary roller 27 are brought into contact with each other to start the conveyance of the slip paper, so that the slip paper is loosened due to the drawing into the roller. Can be prevented.
[0041]
FIG. 5 shows a state in which the printer 1 is set to the standby mode and the printer head 23 is set to the center position shown in FIG. Since the printer 1 is set to the standby mode using the plunger 8, a relatively wide gap W can be secured between the printer head 23 and the paper guide 4 as in FIG. 3. When the printer head 23 moves to the center position, the lead portion 45 of the mask plate 40 hits the recessed portion 53 of the mask guide 50. Since the mask plate 40 has elasticity, the upper portion 43 of the mask plate turns to a position where it substantially contacts the paper guide 4 and the inclination angle of the mask plate 40 changes. Therefore, a relatively wide gap Y can be secured between the mask plate 40 and the printer head 23.
[0042]
Further, the concave portion 53 of the mask guide 50 of this example is thick so as to completely cover the lead portion 45 of the mask plate 40. Accordingly, when the lead portion 45 of the mask plate is fitted in the recessed portion 53, the lead portion 45 does not protrude upward from the mask guide 50, and the lead portion 45 is not caught even when the ink ribbon 31 is inserted. It has become.
[0043]
If the printer head 23 is set at such a position and the cover 3 above the printer 1 is removed, the gap between the printer head 23 and the mask plate 40 is wide open so that the ink ribbon 31 is placed above the printer 1. Easy to replace. That is, the ink ribbon 31 can be easily removed from between the printer head 23 and the mask plate 40 by removing the ribbon case 30 from the body. Also, if the ribbon case 30 is attached to the body, the gap between the printer head 23 and the mask plate 40 is wide open, so that the ink ribbon 31 can be smoothly attached. At this time, since the mask plate 40 is inclined in the direction of the paper guide 4 and opened upward, it also serves as a scoop that guides the ribbon 31 to a predetermined position when the ink ribbon 31 is inserted from above. Accordingly, it is possible to prevent troubles such as wrinkling when the ink ribbon 31 is mounted or entering between the mask plate 40 and the paper guide 4, and the occurrence of printing mistakes can be prevented. Also, since the user can replace the ink ribbon without using a nerve, the time required for the replacement can be shortened.
[0044]
If the lead portion 45 of the mask plate 40 is set in the concave portion 53 at the center of the mask guide 50, the gap between the mask plate 40 and the paper guide 4 is reduced, and the upper portion 43 of the mask plate 40 is formed by the paper guide. 4 is substantially in contact. Therefore, when the roll paper 11 is fed using the paper feed rollers 35 and 36, it can be pressed against the paper guide 4 by the mask plate 40, so that the paper can be smoothly fed along the paper guide 4. For this reason, it is desirable to feed the paper when performing journal printing with the printer head 23 set at a substantially central position.
[0045]
Printer control
FIG. 6 shows a control system of the printer 1 of this example. The printer 1 of this example includes an interface 61 that receives print data from an external personal computer or the like, and a CPU 62 that controls the printer in accordance with the print data input through the interface 61. The CPU 62 includes a ROM 63 storing a program and the like described below, and a RAM 64 for temporarily storing print data. The print data is sent to the head control circuit 69 via the CPU 62 as needed, and the printer head. 23 can be printed. Further, in order to perform printing at a predetermined position, a carriage motor 73 for moving the carriage unit 22 to which the printer head 23 is mounted and a control circuit 67 for the carriage motor are provided. A feed motor 74 for feeding paper and this control circuit 68 are also provided, and these control circuits 67 and 68 are connected to the CPU 62.
[0046]
Further, since the printer 1 of this example performs the above-described operation for setting paper or replacing the ribbon, a sensor 71 for detecting opening / closing of the printer cover 3 and a printer for inputting the state of this sensor to the CPU 62. A cover open detection circuit 65 is also provided. Further, since three types of printing paper can be printed, a selection switch 72 for selecting these printing papers and a paper load switch detection circuit 66 for detecting the selection contents and inputting them to the CPU 62 are also provided. Further, a mode selection circuit 70 that switches the mode of the printer 1 between the standby mode and the printing mode is also connected to the CPU 62, and the plunger 8 can be operated by this mode selection circuit 70.
[0047]
FIG. 7 shows a control method for setting printing paper using these control systems and replacing the ink ribbon. First, the printer 1 is started at step ST1. As described above, in the printer 1 of this example, since the plunger 8 is operated to set the print mode, the printer 1 is in the standby mode when it is started. In order to set the printer 1 of this example to the standby mode, the printer may be reset.
[0048]
Next, in step ST2, opening / closing of the cover is confirmed using the sensor 71. If the cover 3 is open, the carriage motor 73 is controlled to set the printer head 23 at the center position in step ST3. When the printer head 23 is set at the center position in the standby mode, the printer 1 is in the state described with reference to FIG. Accordingly, the ink ribbon 31 can be easily replaced.
[0049]
Further, in step ST4, it is determined whether or not the selection paper 72 is requested to load the roll paper 11. If there is a request for loading the roll paper 11, the paper feed mechanism of the roll paper 11 is operated using the feed motor 74 in step ST5. As described above, when the roll paper 11 is fed, it is desirable to set the printer head 23 at the center and adjust the gap between the mask plate 40 and the paper guide 4 to be narrow. Next, in step ST6, opening / closing of the cover is confirmed using the sensor 71. If the cover is open, the process returns to step ST4. If the cover is closed, it is determined in step ST7 that the initial setting of the printer has been completed, and the process returns to the normal service.
[0050]
If the initial setting is completed in step ST7 or if it is determined that the cover is closed in step ST2 when it is started, the process proceeds to step ST8. In step ST8, it is determined whether validation is selected by the selection switch 72. If validation is selected, the printer head 23 is moved to the right side 2b of the printer 1 in step ST9. When the printer head 23 is positioned below the upper paper feed roller 25b on the right side, the printer 1 is in the state described with reference to FIG. 3, so that the validation paper 12 can be set smoothly and easily without any trouble.
[0051]
If validation is not selected in step ST8, the process proceeds to step ST10. If slip paper is selected by the selection switch 72, the printer head 23 is moved to the left side 2a of the printer 1 in step ST11. As a result, the printer head 23 is positioned below the left upper paper feed roller 25a, so that the slip paper 13 can be easily inserted as described with reference to FIG.
[0052]
In this way, when the setting of the printing paper is completed by the step, printing is started to shift to step ST12. In step ST12, the mode selection control circuit 70 selects the printing mode and operates the plunger 8. As a result, the paper feed mechanism and the platen move to a predetermined position when printing, and printing can be performed using the printer head.
[0053]
Thus, the printer of this example is equipped with a mask plate that can perform clean printing with low noise and no trouble. By controlling the position of the mask plate in the standby state using a mask guide, it is possible to easily set forms such as validation without any trouble, and it is also easy to replace the ink ribbon. Furthermore, since the mask plate control by the mask guide varies depending on the position of the printer head along the printing direction, the position of the mask plate in the direction perpendicular to the printing paper can be adjusted simply by moving the printer head. Can be controlled. Accordingly, it is possible to easily set a plurality of printing papers without any trouble, and to easily replace the ink ribbon, even though the configuration is simple as described above.
[0054]
(Example 2)
FIG. 8 shows an outline of the printer 1 according to the second embodiment of the present invention. The printer 1 of this example is also a wire dot type printer that can execute three types of printing paper and printing methods, that is, the roll paper 11, the validation paper 12, and the slip paper 13. For this reason, the same code | symbol is attached | subjected to the location which is common in Example 1, and description is abbreviate | omitted. The printer 1 of this example also includes a mask plate 40 extending from the carriage unit 22 toward the printer head 23 between the ink ribbon 31 and the roll paper 11. The mask plate 40 extends from the printer head 23 toward the platen 5, and can press the roll paper 11, the validation paper 12, and the slip paper 13 inserted therebetween during the platen 5. Further, a mask guide 60 that contacts a part of the mask plate 40 is provided at the end of the movable range of the printer head 23, in this example, the right end when viewed from the printer head 23 side. Further, a paper presser 17 that guides the roll paper fed after printing is provided above the paper guide 4.
[0055]
FIG. 9 is an enlarged view of the vicinity of the mask guide 60. The mask guide 60 of this example is disposed at the right end of the range in which the printer head 23 moves, and in this example, is constituted by a plate attached to the right end 2a of the printer body. The mask guide 60 of this example includes a substantially flat guide plate 61 disposed on the side of the printer head 23 of the mask plate 40 with respect to the platen or paper guide 4. The guide plate 61 only protrudes from the right end 2a of the printer body to the extent that it contacts a mask plate 40 described later when the printer head 23 moves to the right end. Therefore, the guide plate 61 and the mask plate 40 are not in contact with each other unless the printer head 23 is moved to the right end, and the mask plate 40 functions to press the printing paper toward the platen. Further, if the mask guide 60 is arranged at the end close to the body, it is easy to take support from the body and the like, and it does not get in the way when replacing the ink ribbon. The upper and lower portions 62 and 63 of the guide plate 61 are inclined toward the printer head 23 so that when the edge of the printing paper hits the guide plate 61, the guide plate 61 can be guided to the paper guide 4 side.
[0056]
The mask plate 40 of this example is made of a metal plate 41 as in the above-described embodiment, and includes an upper portion 43 having substantially the same shape as described above in order to press the printing paper against the platen. In the mask plate 40 of this example, the mask guide 60 is at the movement direction of the printer head 23, that is, at the right end, so that it is not in the upper side of the pressing portion 43 but in the lateral direction, in this example, the right side as viewed from the printer head 23 A portion 45 is provided. The upper portion 46 of the pressing portion 43 of the mask plate 40 extends while inclining toward the printer head 23, and even when the edge of the printing paper hits the upper portion 46, the printing paper is placed between the mask plate 40 and the paper guide 4 or the platen. I can guide.
[0057]
In this example, the lead portion 45 extends from the portion 43 pressed onto the platen while being gently inclined toward the printer head 23, and the platen enters the inside of the paper guide 4 and the mask plate 40 is in contact with the paper guide 4. That is, even in the standby mode, the end 45a of the lead portion hits the guide plate 61. Therefore, when the printer head 23 moves to the right end, the end 45a of the lead portion hits the guide plate 61 at a position where the printer head 23 approaches the right end. Further, when the printer head 23 moves to the right end, the lead portion 45 moves while contacting the end of the guide plate 61, and is guided by the inclination of the lead portion 45, so that the upper portion 43 of the mask plate 40 moves as indicated by the arrow A. It is drawn to the side.
[0058]
Contrary to the mask guide described above, it is also possible to press the mask plate against the platen side by setting the guide plate excluding the end of the movable area of the printer head and protruding the guide plate toward the platen side. . Then, at the end of the movable range, the mask plate may be given elasticity toward the printer head opposite to that of the present example so that the distance from the platen or the paper guide is increased. However, in consideration of the accuracy required for such a guide plate and the mounting of an ink ribbon, it is desirable to provide a mask guide at either end as in this example. Also, since feed rollers that transport printing paper are often placed on the edge side, if the mask plate is on the edge when loading printing paper, the path for inserting the printing paper is combined with these. There is also an advantage that it is easy to configure.
[0059]
FIG. 10 shows a state where the printer head 23 is located at the position of FIG. This figure shows a state in which the printer 1 is set to the standby mode using the plunger 8, and a wide gap W is secured between the printer head 23 and the paper guide 4. Further, since the printer head 23 is located near the center of the printable range, the lead portion 45 of the mask plate does not contact the guide plate 61. Therefore, the mask plate 40 is pressed against the paper guide 4, and a wide gap Y is secured between the mask plate 40 and the printer head 23. Therefore, this state is suitable for replacing the ink ribbon. Further, in this state, when the printer 1 is set to the printing mode using the plunger 8, the platen 5 protrudes from the paper guide 4, so that the same state as in FIG. 2 is obtained, and the printing paper such as roll paper or validation paper is obtained by the mask plate 40. Can be pressed against the platen to achieve clean printing with low noise.
[0060]
FIG. 11 shows a state where the printer head 23 is moved to the position of FIG. As described above, when the printer head 23 moves to the right end, the lead portion 45 of the mask plate 40 comes into contact with the guide plate 61, and the mask plate 40 is drawn toward the printer head 23 by the mutual operation of the lead portion 45 and the guide plate 61. It is done. As a result, the gap between the printer head 23 and the mask plate 40 is reduced, and the gap between the mask plate 40 and the platen 5 and between the mask plate 40 and the paper guide 4 is increased. Therefore, the validation paper 12 can be easily set from above the printer. Further, in the printer of this example, since the mask plate 40 is operated from the printer head 23 side, it is possible to secure a gap between the mask plate 40 and the paper guide 4 in a state where there is no obstacle. For this reason, when the validation paper 12 is set, there is no portion where the edge of the validation paper 12 hits in the paper path, so that the user can set the validation paper 12 without applying force. Therefore, the edge of the validation paper 12 is not caught and tilted, and the edge of the validation paper 12 is not bent at all, and the validation paper 12 can be set very smoothly and reliably. If the printer head 23 is moved from the end toward the center after setting the validation paper 12, the lead portion 43 of the mask plate 40 is detached from the guide plate 61, so that the validation paper 12 is moved by the mask plate 40 to the paper guide 4 or the platen 5. Can be pressed and held. Before and after this, the plunger 8 is operated, and the validation paper 12 can be fed to the position where printing is started by sandwiching the validation paper 12 by the paper feed rollers 25, 27, 33 and 34.
[0061]
The control system of the printer 1 of this example may be the same as the system described based on FIG. In addition, a control method including the steps described with reference to FIG. 7 can be adopted as a control method when the printing paper is set and the ink ribbon is replaced. However, the position of the printer head 23 when replacing the ink ribbon 31 in step ST3 does not necessarily have to be the center, and may not be the right end. Conversely, when validation is selected, in step ST9, it is necessary to move the printer head 23 to the right end of the printer 1 so that the lead portion 43 of the mask plate 40 contacts the guide plate 61.
[0062]
In this way, the printer of this example is also a printer equipped with a mask plate, can perform clean printing with low noise, and control the distance between the mask plate and the printer head to prevent troubles such as improper setting of printing paper and dirt. Can be prevented. Therefore, it is suitable for printers with a high frequency of handling single-sheet printing paper that is frequently set and ejected such as validation and slip paper, and waste of printing paper due to troubles during setting and printing by the user To avoid wasting time.
[0063]
Further, in the printer of this example, since the mask plate is operated from the printer head side, the gap between the mask plate and the printer head is completely opened, so that the space between the mask plate and the platen or the paper guide is completely opened. . Therefore, when setting the validation, it can be inserted on the paper guide without resistance, that is, between the mask plate and the platen. For this reason, it is not necessary to incline when setting the validation or to apply a slight force to the validation paper at the time of insertion in order to adjust this. The user can set the validation in a predetermined position only by dropping the validation with the right end of the paper guide aligned, and reliable printing can be obtained.
[0064]
Further, in addition to the setting of printing paper, the printer of this example can easily replace the ink ribbon, so that maintenance is easy, and in this respect, it can be said that the printer does not place a burden on the user.
[0065]
In the above example, a plate-shaped mask guide is used to control the position of the mask plate along with a part of the mask plate. However, for example, in conjunction with the movement of the carriage. Of course, the position of the mask plate may be controlled using a rotating cam mechanism or the like. In the above example, the position of the roller used as the paper feed mechanism and the position at which the gap between the mask plate and the printer head is narrowed are substantially matched. Of course, it is possible to easily set the printing paper by reducing the head interval. Instead of forming the introduction path of the printing paper by the roller, the introduction path may be provided by a plate or the like in the vicinity of the paper feeding mechanism. In addition, when the position of the roller changes, it is easy to change the mask guide so that the mask plate can be controlled in accordance with the position. When the mask guide is changed, the position for controlling the mask plate can be changed simply by moving the printer head in accordance with the position.
[0066]
In addition to the independent unit as in this example, the printer may be incorporated in a cash register or the like. Furthermore, in this example, the opening / closing of the cover is detected as a signal for moving the printer head to the center, but other signals such as a reset signal may be used. Further, although a selection switch is provided for selecting the validation or the like, it is of course possible to provide a sensor in the introduction portion of the paper feed mechanism or the like so that the printer head can automatically determine and move the printer head.
[0067]
【The invention's effect】
As described above, the present invention relates to a printing apparatus that employs a mask plate that is installed between an ink ribbon and printing paper and that can perform high-quality printing and simultaneously suppress printing noise. By controlling the gap between the printing head and the print head, it is possible to simplify the setting of printing paper including forms, and to prevent troubles such as contamination during printing and printing failure due to defective setting. Furthermore, it is easy to replace the printer ribbon, and troubles such as printing defects accompanying the replacement of the ribbon can be prevented.
[0068]
Thus, the printing apparatus according to the present invention is an apparatus that can easily perform various types of printing such as validation printing and slip printing without any trouble. Furthermore, since the printing apparatus according to the present invention can minimize troubles associated with setting and discharging, when printing single-sheet paper such as validation paper and slip paper, in which printing paper is frequently set and discharged. It is an optimal printing device. Therefore, it is suitable as a device such as a store or cashier, which has many opportunities for handling, such as a cashier, an information processing device having multiple functions, or a terminal such as a cash register. By adopting the printing device according to the present invention, waste of printing paper can be prevented, the time spent for printing and maintenance by the user can be saved, and a clean and clean printed form can be reliably supplied. By doing so, service to customers can be improved.
[Brief description of the drawings]
FIG. 1 is a perspective view illustrating an outline of a printer according to a first embodiment of the invention.
2 is an enlarged cross-sectional view showing a configuration around a printer head of the printer shown in FIG. 1, and is a diagram showing a state of a print mode. FIG.
3 is an enlarged cross-sectional view showing a configuration around a printer head of the printer shown in FIG. 1, and is a diagram showing a state in which forms are inserted in a standby mode.
4 is an enlarged view of a mask guide of the printer shown in FIG. 1. FIG.
5 is an enlarged cross-sectional view showing a configuration around a printer head of the printer shown in FIG. 1, and is a diagram showing a state in which an ink ribbon is replaced in a standby mode.
6 is a block diagram showing a control system of the printer shown in FIG. 1. FIG.
7 is a flowchart showing control for initial setting of a printer and paper setting based on the control system shown in FIG.
FIG. 8 is a perspective view illustrating an outline of a printer according to a second embodiment of the invention.
9 is an enlarged view of the mask guide of the printer shown in FIG. 8. FIG. 9 (a) shows a state in which the mask plate pushes the platen (paper guide) side, and FIG. 9 (b) shows the mask. A state is shown in which the plate is pulled toward the printer head.
10 is an enlarged cross-sectional view showing a configuration around the printer head of the printer shown in FIG. 8, and is a diagram showing a state in which the ink ribbon is replaced in a standby mode.
11 is an enlarged cross-sectional view showing a configuration around the printer head of the printer shown in FIG. 8, and is a diagram showing a state in which forms are inserted in a standby mode.
[Explanation of symbols]
1. Printer
2. Printer body
3. Printer cover
4. Paper guide
5. Platen
6. Cutter
7. Lower paper guide
8. Plunger
9. Arm
10. ・ Lever
11. Roll paper
12. Validation paper
13. Slip paper
14, 15 ... Spring
16. Stopper
17. Paper press
20. Guide
21. Head unit
22. Carriage unit
23..Printer head
24 belt
26, 28 ... Shaft
25, 27, 33, 34, 35, 36 ... Paper feed roller
30 ・ ・ Ribbon case
31. Ink ribbon
40..Mask board
41..Metal plate
42. Loosely bent lower part of metal plate
43 .. Upper part pressed against the platen of the metal plate
44..Diamond opening of mask plate
45..Lead part of mask plate
50, 60 ... Mask guide
51 .. Guide part
52 .. Projected part of end of guide part
53 .. A recessed part in the center of the guide part
61..Guide plate

Claims (14)

In a printing apparatus having a dot impact print head for printing while moving to a print sheet set on a platen, and a mask plate capable of pressing the print sheet from the print head side to the platen.
In the standby mode, when the mask plate moves with the dot impact print head across the printing paper, the mask plate is moved vertically with respect to the surface of the printing paper, and the mask plate and the dot impact printing are performed. A printing apparatus comprising mask plate guide means for changing a distance from a head corresponding to a position of the mask plate in a direction crossing the printing paper. The printing apparatus according to claim 1, wherein the mask plate is
An elastic part partially fixed to the bottom of the print head and extending to the top of the print head;
A lead portion extending from the elastic portion,
The lead portion is in contact with at least a part of the mask plate guide means, and is guided by the shape of the mask plate guide means to change the interval between the elastic portion and the dot impact print head. apparatus. The printing apparatus according to claim 2, wherein
Platen moving means for positioning the platen in at least two positions;
In the first position, the platen is positioned near the dot impact print head;
In the second position, the platen is positioned far from the dot impact print head;
The printing apparatus according to claim 1, wherein when the platen is positioned at the first position, the platen is brought into contact with the mask plate. The printing apparatus according to claim 2, wherein
An ink ribbon positioned between the dot impact print head and the printing paper;
When the mask plate is positioned at a position facing the concave portion of the mask plate guide means, a gap between the mask plate and the dot impact print head is enlarged to facilitate replacement of the ink ribbon. A printing apparatus characterized by the above.   3. A printing apparatus according to claim 2, further comprising at least two paper paths separated by said mask plate guide means.   The printing apparatus according to claim 2, further comprising a pressing unit disposed at one end in a moving direction of the dot impact print head, wherein the dot impact printing head is positioned at the one end. A printing apparatus provided to press the mask plate toward the dot impact print head when   7. The printing apparatus according to claim 6, wherein the pressing means is a projecting member, and the mask plate is brought into contact with a part of the mask plate as the dot impact print head is moved near the one end portion. A printing apparatus configured to gradually approach the dot impact print head.   5. The printing apparatus according to claim 4, wherein the concave portion is provided at substantially the center of the mask plate guide means in a direction crossing the printing paper. 5. The printing apparatus according to claim 4, wherein an end portion of the concave portion is set higher than any portion of a front end portion of the mask plate in a direction perpendicular to the surface of the printing paper, and the ink ribbon is inserted into the gap. when it is, the printing apparatus characterized in that said ink ribbon is configured to Komu sliding in said gap. A mask plate disposed between the print head and the platen on the carriage, in contact with a first guide plate having a recess in the center in the standby mode , and reciprocating with the carriage; and a platen In a control method of a printing apparatus having a platen moving mechanism that alternately positions a first position close to the print head and a second position spaced from the print head,
When a cut sheet is designated to be set at a printing position where the platen and the print head face each other,
(A) a step of the platen moving mechanism positioned the platen in the second position, extends between the gap between the platen and the print head,
(B) after the insertion of the cut sheet paper is detected, the steps of the upper end of at least the sheet the noncontinuous media is conveyed to pass through the printing position,
(C) The platen moving mechanism positions the platen at the first position, the platen comes into contact with the mask plate to expand a gap between the mask plate and the first guide plate, and then the single sheet And a step of conveying the sheet to a printing position where the platen and the print head face each other. A mask plate disposed between the print head and the platen on the carriage , contacting the first guide plate having a recess in the center in the standby mode , and reciprocating with the carriage; and a housing And a cover sensor capable of detecting opening or closing of a part of the printing apparatus,
Comprising the steps of: (a) the cover sensor when the cover is opened to detect the opening,
( B ) When the opening of the cover is detected by the cover sensor , the carriage is transported to a position where the mask plate faces the concave portion of the first guide plate , and the gap between the mask plate and the print head is detected. And a step of enlarging the space. A mask plate disposed between the print head and the platen on the carriage, in contact with a first guide plate having a recess in the center in the standby mode , and reciprocating with the carriage; and a platen Platen moving means for alternately positioning the first position close to the print head and the second position spaced apart from the print head;
In a control method of a printing apparatus having a second guide plate having a protruding member disposed at one end within a range in which the print head can reciprocate in the transverse direction,
When printing paper is designated to be set at a printing position where the platen and the print head face each other,
(A) positioning the platen at a second position by the platen moving means;
(B) said projecting member is provided, the print head toward the end of the one in the reciprocable range transversely, in a state in which the mask plate is brought into contact with the first guide plate, Transporting the carriage;
(C) As the carriage approaches the one end, the mask plate is gradually brought closer to the print head by bringing a part of the mask plate into contact with the protruding member , and the mask plate And a step of enlarging the gap with the platen. In a printing apparatus having a print head for printing while moving to a printing paper set on a platen, and a mask plate capable of pressing the printing paper from the printing head side to the platen,
  In the standby mode, when the mask plate moves with the print head across the printing paper, the mask plate is moved perpendicularly to the surface of the printing paper, and the distance between the mask plate and the printing head is A guide plate that changes the mask plate according to the position in the direction across the printing paper,
  In the validation paper insertion mode and the ink ribbon replacement mode in the standby mode,
The printing apparatus is characterized in that the mask plate and the print head have different intervals. In the ink ribbon exchange mode, the mask plate and the print head are moved to the concave portion of the first guide plate having a concave portion in the center,
  The printing apparatus according to claim 13, wherein in the validation sheet insertion mode, the mask plate and the print head are moved to a protrusion of a second guide plate provided at one end.

Images