JP3719575B2 - Paper deformation prevention device for printer with cutter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet deformation preventing apparatus for a printer with a cutter, which prints on a sheet conveyed by a conveying unit and cuts and separates each printed matter by a cutting unit.
[0002]
[Prior art]
As a prior art of this type of printer with a cutter, Japanese Utility Model Publication No. 63-124148 can be cited. This printer with a cutter uses thin continuous paper such as a receipt, and after printing on the paper, feeds it to the cutter unit while guiding it from the top, bottom, left and right by a pathway, and cuts it with the cutter. A discharge roller is provided in the vicinity of the outside of the cutter unit in the paper conveyance direction. The printed material cut by the cutter is discharged to the outside from the discharge port of the printer. When a series of printing is completed, the leading edge of the continuous sheet is returned to the printing start position of the printing unit as a standby position until the next printing starts, and is configured to wait at that position.
[0003]
[Problems to be solved by the invention]
However, in the above prior art, the roll paper is reversed in the direction opposite to the winding direction in the middle of the paper conveyance path, and after being printed by the printing unit, the roll paper is cut and separated for each print unit. No particular problems are considered in the case of a printer with a cutter. When this type of printer is made to stand by at the printing start position of the printing unit as in the above prior art, it is deformed by the time of the next printing start due to the “reversal”, and the “reversed” state. When the portion waiting in step S3 is cut and separated from the roll paper by the cutting means, it is reversed and deformed into a shape different from that of the other portion P2, as in the printed matter denoted by reference numeral P1 in FIG. There was a problem.
[0004]
SUMMARY OF THE INVENTION An object of the present invention is to provide a cutter in which roll paper is reversed in the direction opposite to the winding direction in the middle of a paper conveyance path, and is printed by the printing unit and then cut and separated for each print unit by a cutting means. An object of the present invention is to provide a sheet deformation preventing device for a printer with a cutter that can prevent “deformation”, which is a particular problem in a printer with a mark.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a paper deformation preventing device for a printer with a cutter according to the first aspect of the present invention includes a paper feed roller, a paper feed roller, and a discharge roller, which are sequentially arranged on the paper transport path from the upstream side. A drive control unit for controlling the drive state of each of these rollers, and a printing unit between the paper feed roller and the discharge roller, and the roll paper is opposite to the winding direction in the middle of the paper transport path A printer with a cutter, which is formed so as to be reversed, and is printed by the printing unit and then cut and separated for each print unit by a cutting unit. If each roller is reversed and the leading edge of the roll paper is left as it is, it is formed to return to the upstream position from the position where the paper is deformed and to stand by, and the cut paper is printed in the vicinity of the cutting means. The sheet-sheet discharge roller for feeding out to the outside is provided, and the sheet-sheet discharge roller and the sheet-sheet discharge roller are arranged in front of the sheet-sheet discharge roller to feed the sheet forward. Is set to be smaller than the length of the cut paper that is supposed to be printed by the printer, and the cutting means includes a fixed lower blade and a downstream of the fixed lower blade in the paper conveyance direction. And a movable upper blade that moves up and down and cuts the roll paper in pairs with the fixed lower blade, and the blade surface of the fixed lower blade rises in the conveyance direction of the roll paper The blade surface is formed on an inclined surface, and the blade surface also serves as a guide member for the conveyed paper.
[0006]
According to the present invention, when the leading end of the roll paper is left as it is after the printing is completed, it is formed so as to return to the upstream position from the position where the deformation of the paper is caused to stand by, so that it is peculiar to the “deformation”. There is no problem, and it is possible to prevent irregularities in the cut printed matter.
[0007]
According to a second aspect of the present invention, in the paper deformation prevention device for a printer with a cutter according to the first aspect, the roll paper is placed on the paper feed roller and paper feed roller portions of the paper transport path. And the drive control unit returns the leading end of the roll paper to a position upstream from the paper feed roller and downstream from the paper feed roller to wait. It is characterized by being formed.
[0008]
According to the present invention, the paper feed roller and the paper feed roller, which are normal reversal positions, do not stand by as they are, and the leading edge of the roll paper reaches a position upstream from the paper feed roller and downstream from the paper feed roller. Since the problem is caused by the “deformation” only in the portion of the paper feed roller, it is almost negligible and it is possible to prevent irregularities in the cut printed matter. Furthermore, since the leading edge of the paper is separated from the paper feed roller, it is easy to remove the roll paper when replacing it, and the replacement work is also easy. In addition, since there is no standby in the printing section, there is no possibility of contamination due to ink dripping.
[0009]
According to a third aspect of the present invention, in the paper deformation prevention device for a printer with a cutter according to the second aspect, the drive control unit causes the leading edge of the roll paper to be held between the paper feed roller portions to stand by. It is formed as follows. According to the present invention, since the leading edge of the roll paper is held between the feeding roller portions and is in a standby state, it is possible to prevent the leading edge of the paper from being inadvertently flooded, deformed or damaged.
[0010]
According to a fourth aspect of the present invention, in the paper deformation prevention device for a printer with a cutter according to the second or third aspect, the sheet passes between the paper feed roller and the paper feed roller in the paper conveyance path. A paper detector is provided to detect the physical quantity such as the length and position of the paper and the drive control unit is configured to return the leading edge of the roll paper to the upstream from the paper detector and wait. It is characterized by being.
[0011]
According to the present invention, the peculiar problems caused by the “deformation” are almost negligible, and it is possible to prevent irregularities from occurring in the cut printed matter. Since it passes through the detector, it is possible to accurately grasp the physical quantity such as the length and position of the paper and send it to the paper feed roller and the printing unit, thereby easily realizing error-free printing.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing an embodiment of a printer with a cutter provided with a sheet deformation preventing device according to the present invention, and FIG. 2 is a perspective view of a printed matter printed and cut by the printer with a cutter. is there.
[0013]
In the printer with a cutter according to the present embodiment, as shown in FIG. 1, a roll paper feeding device 20 that is continuous paper and a paper feeding device 21 for cut sheets such as postcards are provided at the rear of the printer body. Is provided. Then, the continuous paper 1a conveyed from the roll paper held in the former paper feeding device 20 and the cut sheet paper held in the latter paper feeding device 21 and conveyed from the device 21 (omitted in FIG. 1). ) Are individually printed by the printing unit 2 (including printing and printing), the continuous paper 1a is cut and separated for each printed matter by the cutting means 3, and the other cut sheet is left as it is. 1a passes through the same conveyance path and is discharged to the outside of the printer. In FIG. 1, reference numeral 23 denotes a paper feed roller, and reference numeral 24 denotes a cut sheet separation pad.
[0014]
As shown in FIG. 1, a paper feed roller 4 for feeding the continuous paper 1 a before printing in the direction of the printing unit 2 is provided at the upstream position on the upstream side of the printing unit 2 and in the vicinity of the downstream side of the printing unit 2. Is provided with a discharge roller 5. It said discharge roller 5 is Ru Oh the sheet conveying roller for feeding the printed paper 1a in other party. Further, a cut paper discharge roller 6 is provided near the downstream side of the cutting means 3 for sending the cut paper to the outside of the printer. The cut paper discharge roller 6 serves to ensure that the printed cut paper can be discharged out of the printer even if it is out of the position where it receives the feeding force of the discharge roller 5. Therefore, the gap between the cut sheet paper discharge roller 6 and the discharge roller 5 arranged immediately before in the transport direction is set smaller than the length of the cut sheet paper.
[0015]
The paper deformation prevention device for a printer with a cutter according to the present embodiment includes a paper feed roller 23, a paper feed roller 4 and a discharge roller 5, which are sequentially arranged on the paper transport path from the upstream side, and these rollers 23, 4, and 4. 5 includes a drive control unit 40 that controls a driving state such as normal rotation and reverse rotation of the paper 5 and a printing unit 2 (including printing and printing) between the paper feed roller 4 and the discharge roller 5, and is conveyed from the roll paper. continuous paper 1a is, the present embodiment is formed so that the inverted in its winding direction opposite to the direction at the middle in which part of the paper feed roller 23 and the paper feed roller 4 of the sheet conveying path, printing After being printed by the section 2, the cutting means 3 cuts and separates each printed matter unit (FIG. 2).
[0016]
And after the end of printing, the drive control unit 40 reverses the rollers 23, 4, 5 to return the leading edge of the continuous paper 1a from the position of the cutter part of the cutting means, and passes the printing start position. Further, if left as it is, it is formed so as to return to the upstream position from the position where the sheet is deformed, that is, the position where it does not receive the reversal force and wait. The reverse rotation of the rollers 23, 4 and 5 based on the drive control unit 40 is configured to automatically start when a preset time has elapsed after the end of printing.
[0017]
In the present embodiment, the drive control unit 40 is configured to return the leading edge of the continuous paper 1 a to a position upstream from the paper feed roller 4 and downstream from the paper feed roller 23 and wait. At this time, the continuous paper 1a may be formed so that the leading edge of the continuous paper 1a is sandwiched between the paper feed roller 23 and the separation pad 24 and waits.
[0018]
Further, in the present embodiment, as shown in FIG. 1, the passage of paper between the paper feed roller 23 and the paper feed roller 4 in the paper transport path is detected to determine the physical quantity such as the length and position of the paper. A paper detector 41 is provided, and the drive control unit 40 is configured to return the leading edge of the continuous paper 1a to the upstream from the position of the paper detector 41 and wait.
[0019]
The cut paper sheet discharge roller 6 mainly serves to discharge the cut sheet paper to the outside of the printer as described above, and is not particularly required for discharging the continuous paper 1a to the outside of the printer. Is enough. However, since the printer according to the present embodiment has a configuration in which both the continuous paper 1a and the cut paper pass through the same conveyance path, the cut paper discharge roller 6 portion is used as the cut paper. In addition, the continuous paper 1a actually passes through. As a result, the cut paper sheet discharge roller 6 functions to assist the discharge of the continuous paper 1a to the outside of the printer.
[0020]
The cutting means 3 includes a fixed lower blade 8 fixed at a position shown in the drawing via a fixing means (not shown) and a movable upper blade 7 that moves up and down to cut the paper 1a in pairs with the fixed lower blade 8. I have. The movable upper blade 7 is disposed downstream of the fixed lower blade 8 in the paper transport direction. Note that the means for driving the movable upper blade 7 up and down is also omitted. In this embodiment, the blade surface 7a of the movable upper blade 7 is formed as an inclined surface that rises in the conveyance direction of the paper 1a, and the blade surface 8a of the fixed lower blade 8 is also in the conveyance direction of the paper 1a. It is formed in the inclined surface which rises toward. Due to this inclined surface structure, the cut printed matter located downstream from the cutting position, that is, downstream from the cutting edge 7b of the movable upper blade 7 is better separated from the movable upper blade 7 by the inclined surface. It can be smoothly discharged outside the printer.
[0021]
Furthermore, in this embodiment, the blade surface 8a of the fixed lower blade 8 is formed on a gently inclined surface so as to serve also as a guide member for the sheet 1a to be conveyed, and the position of the blade edge 8b is just the conveyance level of the sheet 1a. It is formed to be a position. As shown in the figure, the thickness of the main body of the fixed lower blade 8 is formed approximately twice as thick as the thickness of the movable upper blade 7, and it becomes easy to form the blade surface 8a on a gently inclined surface as described above. It is like that.
[0022]
In the present embodiment, after the cutting by the cutting means 3, the paper return member that returns to the paper transport position by preventing the end of the paper 1 upstream from the cutting position from being pulled up while being caught by the movable upper blade 7 that moves upward. 9 is provided. The sheet return member 9 is formed such that its action point 10 is located near the upper surface 8a of the fixed lower blade 8 and near the front edge 7b of the movable upper blade 7 as shown in the figure. Yes. The sheet return member 9 is fixed to the frame 12 by a mounting piece 11 integral with the main body at the base end so that the action point 10 is in the position. By providing the sheet return member 9, the end of the sheet 1a located upstream from the position of the cutting edge 7b of the movable upper blade 7 remains caught by the movable upper blade 7 that moves upward after the continuous sheet is cut. Even if they are pulled together, the action point 10 of the paper return member 9 can immediately remove the end of the paper 1 from the movable upper blade 7 and return the end of the paper 1a to the correct paper transport position.
[0023]
In the present embodiment, as shown in the figure, a rotatable wheel 14 is provided that presses the curl of the continuous paper 1a caused by the roll paper by a pair with the opposing paper guide support member 13. The wheel 14 is formed so as to be held by the paper return member 9 and can suppress curling of the roll paper without increasing the number of parts. As shown in the figure, another wheel 15 is provided at the upstream position of the sheet guide lower support member 13.
[0024]
In FIG. 1, reference numeral 16 denotes a dedicated cover surrounding the cutting means 3, and reference numeral 17 denotes an opening for discharging the paper 1a to the outside. In the present embodiment, a waste material discharge port 27 that guides waste material (not shown) generated when the continuous paper 1 a is cut to the outside of the printer is provided below the locking member 25. Reference numerals 28 and 29 denote an upper wall surface and a lower wall surface of the waste material discharge port 27, respectively. A wheel 31, which is a driven roller for forming the cut sheet discharge roller 6, is disposed above the upper wall surface 28 and slightly above the opening 17 on the rear surface side of the front surface portion 30 of the dedicated cover 16. Has been.
[0025]
Next, the operation of the paper deformation preventing device for the printer with a cutter according to the above embodiment will be described. According to the present embodiment, after the end of printing, the leading edge of the continuous paper 1a is returned to a position where it does not deform even if it is left as it is, so that it waits. As shown in FIG. 2, it is possible to prevent irregularities in the cut printed matter.
[0026]
Further, the paper feed roller 23 and the paper feed roller 4 that are the normal reversal positions are not kept waiting as they are, and the leading edge of the continuous paper 1a is located upstream of the paper feed roller 4 and downstream of the paper feed roller 23. In the case of returning and waiting, since the unique problem due to the “deformation” is only the portion of the paper feed roller, it is almost negligible, and it is possible to prevent irregularities in the cut printed matter. it can. Further, since the leading edge of the paper is detached from the paper feed roller 4, when the roll paper is exchanged, it is easy to remove it, and the exchange work is also easy.
[0027]
In addition, when the leading edge of the continuous sheet 1a is held between the sheet feeding roller 23 and the separation pad 24, the leading edge of the sheet can be prevented from being inadvertently flooded, deformed, or damaged. .
[0028]
Further, a paper detector 41 is provided between the paper feed roller 23 and the paper feed roller 4 in the paper transport path, and the drive control unit 40 returns the leading edge of the roll paper to the upstream side of the paper detector 41 and waits. In this way, the problems peculiar to the “deformation” are almost negligible, and it is possible to prevent irregularities in the cut printed matter and to prevent the leading edge of the paper when printing is resumed. Since 1a first passes through the paper detector 41, the physical quantity such as the length and position of the paper can be accurately grasped and sent to the paper feed roller 4 and the printing unit 2, thereby easily realizing error-free printing. be able to.
[0029]
【The invention's effect】
According to the present invention, when the leading end of the roll paper is left as it is after the printing is completed, it is formed so as to return to the upstream position from the position where the deformation of the paper is caused to stand by. It is possible to prevent a specific problem caused by the occurrence of irregularities in the cut printed matter.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a printer with a cutter provided with a sheet deformation preventing device according to the present invention.
FIG. 2 is a perspective view of a printed matter obtained by resuming printing and waiting for printing after waiting for printing by the printer with a cutter according to the embodiment.
FIG. 3 is a front view of the cutting means portion, which is a perspective view of a printed matter that is printed and cut by restarting printing after waiting for printing by a conventional printer with a cutter.
[Explanation of symbols]
1a continuous paper 2 printing unit 3 cutting means 4 paper feed roller 5 discharge roller 7 movable upper blade 8 fixed lower blade 9 paper return member 23 paper feed roller 24 separation pad 25 locking member 40 drive control unit 41 paper detector

Claims (4)

A paper feed roller, a paper feed roller, and a discharge roller sequentially arranged from the upstream side in the paper transport path;
A drive control unit for controlling the drive state of each of these rollers;
A printing unit between the paper feed roller and the discharge roller;
The roll paper is formed so as to be reversed in the direction opposite to the winding direction in the middle of the paper conveyance path, and is printed by the printing unit and then cut and separated for each print unit by a cutting unit. A printer with a cutter,
The drive control unit is formed so as to wait after returning to the upstream position from the position where the paper is deformed when the front end of the roll paper is left as it is by reversing the rollers after printing is completed,
A cut sheet paper discharge roller is provided in the vicinity of the cutting means to send out the cut sheet paper to the outside of the printer, and is disposed in front of the cut sheet paper discharge roller to feed the paper to the front. The interval between the discharge roller and the cut paper discharge roller is set smaller than the length of the cut paper that is supposed to be printed by the printer,
The cutting means includes a fixed lower blade, and a movable upper blade that is disposed downstream of the fixed lower blade in the paper transport direction and moves up and down to cut the roll paper in pairs with the fixed lower blade. The blade surface of the fixed lower blade is formed on an inclined surface that rises in the conveyance direction of the roll paper, and the blade surface also serves as a guide member for the conveyed paper. Printer paper deformation prevention device.   2. The roll paper according to claim 1, wherein the roll paper is formed so as to be reversed in a direction opposite to a winding direction thereof at a portion of the paper feed roller and paper feed roller of the paper transport path, and the drive control unit includes a roll A paper deformation prevention device for a printer with a cutter, wherein the paper leading end is returned to a position upstream of the paper feed roller and downstream of the paper feed roller to stand by.   3. The paper deformation prevention device for a printer with a cutter according to claim 2, wherein the drive control unit is formed so that the leading edge of the roll paper is held between the paper feed roller portions to stand by.   4. The paper detector according to claim 2, wherein a paper detector is provided between the paper feed roller and the paper feed roller in the paper transport path to detect a physical quantity such as a length and a position of the paper by detecting the passage of the paper. The paper deformation prevention device for a printer with a cutter is characterized in that the drive control unit is configured to return the leading end of the roll paper to a position upstream from the paper detector and wait.

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