JP2000108434A - Paper deformation preventing apparatus for printer fitted with cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a peculiar 'deformation' in a printer fitted with a cutter constituted so that a roll paper is reversed in the direction reverse to the winding direction thereof on the way of a paper feed passage and printed in a printing part to be cut and separated at every printed matter unit by a cutting means. SOLUTION: In a printer fitted with a cutter equipped with the paper supply roller 23, paper feed roller 4 and discharge roller 5 successively arranged to a paper feed passage from an upstream side, a drive control part 40 controlling the drive states of these rollers and the printing part 2 provided between the paper feed roller and the discharge roller 5 and constituted so that roll paper is reversed in the direction reverse to the winding direction thereof on the way of a paper feed passage and printed in a printing part to be cut and separated at every printed matter unit by a cutting means, the drive control part 40 is formed so as to reverse the respective rollers after the completion of printing to return the leading end of the roll paper to the position on the upstream side of a position where paper is deformed when allowed to stand as it is to allow the same to stand by.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing paper deformation of a printer with a cutter, which prints on paper conveyed by conveying means and cuts and separates each printed material by cutting means.

[0002]

2. Description of the Related Art Japanese Utility Model Application Laid-Open No. 63-124148 is an example of a conventional printer with a cutter. This printer with a cutter uses thin continuous paper such as a receipt, prints it, sends it to a cutter unit while guiding it from above, below, right and left by a pathway, and cuts it with the cutter. A discharge roller is provided near the outside of the cutter unit in the paper transport direction. The printed material cut by the cutter is discharged to the outside from a discharge port of the printer. Then, when a series of printing is completed, the leading end of the continuous paper is returned to the printing start position of the printing unit as a standby position until the next printing starts, and is formed to wait at that position.

[0003]

However, in the above-mentioned prior art, the roll paper is reversed in the direction opposite to the winding direction in the middle of the paper transport path, is printed by the printing unit, and is then printed by a cutting unit. No particular consideration is given to the problems inherent in the case of printers with cutters which are cut and separated every time. If the printer of this type is made to stand by at the printing start position of the printing unit as in the prior art, the printer is deformed until the start of the next printing due to the “reversal”, and the “reversal” state When the portion waiting at is cut and separated from the roll paper by the cutting means, it is inverted and deformed into a shape different from that of the other portion P2, as in a printed matter denoted by reference numeral P1 in FIG. There was a problem.

[0004] It is an object of the present invention to enable a roll paper to be reversed in the direction opposite to the winding direction in the middle of a paper transport path, printed by the printing unit, and then cut and separated for each printed material by a cutting unit. An object of the present invention is to provide an apparatus for preventing paper deformation of a printer with a cutter, which can prevent "deformation" which is a particular problem in a printer with a cutter.

[0005]

According to a first aspect of the present invention, there is provided a sheet-deformation preventing apparatus for a printer with a cutter according to the present invention. Rollers, a paper feed roller and a discharge roller, 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. A printer with a cutter that is reversed in the direction opposite to the winding direction on the way, is printed by the printing unit, and is cut and separated for each printed material unit by a cutting unit. After the end, the rollers are rotated in the reverse direction, and if the leading end of the roll paper is left as it is, the roll paper is returned to an upstream position from a position where the paper is deformed, and is made to stand by. It is.

According to the present invention, after the end of printing, if the leading edge of the roll paper is left as it is, it is formed so as to return to the upstream position from a position where the paper is deformed and to stand by, so that the "deformation" is caused. Thus, it is possible to prevent the occurrence of irregularities in the cut printed material.

According to a second aspect of the present invention, in the apparatus for preventing paper deformation of a printer with a cutter according to the first aspect, the roll paper is supplied to the paper feed roller and the paper feed roller in the paper transport path. The drive control unit returns the leading end of the roll paper to a position upstream of the paper feed roller and downstream of the paper feed roller. It is characterized by being formed to stand by.

According to the present invention, the leading end of the roll paper is located upstream of the paper feed roller and downstream of the paper feed roller without being kept on standby at the normal reverse position of the paper feed roller and the paper feed roller. Since it returns to a certain position and stands by, the specific problem caused by the "deformation" is limited to the paper feed roller portion, so that it can be almost ignored, and it is possible to prevent the occurrence of irregularities in the cut printed material. . Further, since the leading end of the paper is separated from the paper feed roller, when the roll paper is replaced, it can be easily removed and the replacement work can be facilitated. Further, since there is no need to wait at the printing unit, there is no possibility of contamination due to ink dripping.

According to a third aspect of the present invention, in the paper deformation preventing apparatus for a printer with a cutter according to the second aspect, the drive control section holds the leading end of the roll paper by a paper feed roller portion. Characterized by being formed to stand by. According to the present invention, since the leading end of the roll paper is sandwiched between the paper feed rollers and kept on standby, it is possible to prevent the leading end of the paper from being carelessly flooded, deformed, or damaged.

According to a fourth aspect of the present invention, in the apparatus for preventing paper deformation of a printer with a cutter according to the second or third aspect, the paper transport path is provided between the paper feed roller and the paper feed roller. A paper detector is provided for detecting the passage of the paper and determining a physical quantity such as the length or position of the paper, and the drive control unit returns the leading end of the roll paper to an upstream from the paper detector and waits. It is characterized by being formed as described above.

According to the present invention, the specific problem caused by the "deformation" can be almost ignored, it is possible to prevent the cut printed material from being irregular, and when printing is resumed, the leading edge of the paper is rejected. First passes through the paper detector,
Physical quantities such as the length and position of the sheet can be accurately grasped and sent to the sheet feed roller and the printing section, so that printing without errors can be easily realized.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a substantially entire cross-sectional view showing an embodiment of a printer with a cutter provided with the paper deformation preventing device according to the present invention, and FIG. 2 is a perspective view of a printed material cut and printed by the printer with the cutter. is there.

As shown in FIG. 1, a printer with a cutter according to this embodiment has a paper feeder 20 for roll paper as continuous paper and a paper feeder for cut sheets such as postcards at the rear of the printer main body. 21 are provided. The continuous paper 1a conveyed from the roll paper held in the former paper feeder 20 and the cut sheet conveyed from the paper feeder 21 held in the latter paper feeder 21 (not shown in FIG. 1). ) Are printed individually by the printing unit 2 (including printing and printing), the continuous paper 1a is cut and separated for each printed material by the cutting means 3, and the other cut sheet is left as it is, and both sheets are cut. 1a is configured to pass through the same conveyance path and to be discharged outside the printer. In FIG. 1, reference numeral 23 denotes a paper feed roller, and reference numeral 24 denotes a separation pad for cut sheets.

As shown in FIG. 1, continuous paper 1 before printing
A paper feed roller 4 for feeding a in the direction of the printing unit 2 is provided at a position upstream of the printing unit 2 in front of the printing unit 2, and a discharge roller 5 is provided near the downstream side of the printing unit 2. The discharge roller 5
Is a paper transport roller for sending out the printed paper 1a to the other side. Further, a cut sheet discharge roller 6 for sending cut sheets to the outside of the printer is provided near the downstream side of the cutting means 3. The cut sheet discharge roller 6 serves to reliably discharge the printed cut sheet to the outside of the printer even if the cut cut sheet comes out of the position where the feed roller 5 receives the feeding force. Therefore, the cut sheet discharge roller 6 is
An interval between the sheet and the discharge roller 5 which is disposed immediately before in the transport direction is set smaller than the length of the cut sheet.

The paper deformation preventing device of the 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 in the paper transport path from the upstream side. A drive control unit 40 for controlling the drive state of the paper feed roller 4, 4, 5 such as forward rotation and reverse rotation, and a printing unit 2 (including printing and printing) between the paper feed roller 4 and the discharge roller 5; In this embodiment, the continuous paper 1a conveyed from the paper is reversed in the direction opposite to the winding direction by the paper feed roller 23 and the paper feed roller 4 in the middle of the paper conveyance path. After the printing, the cutting means 3 cuts and separates each printed material unit (FIG. 2).

After the end of printing, the drive control section 40 reverses the rollers 23, 4, and 5 to return the leading end of the continuous paper 1a from the position of the cutter section of the cutting means to set the printing start position. Pass, and further, from the position where the paper is deformed if left as it is, to the upstream position, ie,
It is formed so as to return to a position where it does not receive a reversing force and wait. The reverse rotation of the rollers 23, 4, 5 based on the drive control unit 40 is configured to automatically start when a preset time elapses after printing is completed.

In the present embodiment, the drive control unit 40
Is formed so that the leading end of the continuous paper 1a is returned to a position upstream of the paper feed roller 4 and downstream of the paper feed roller 23 to be on standby. At that time, the continuous paper 1a
May be formed so as to be held on standby by nipping the leading end between the paper feed roller 23 and the separation pad 24.

Further, in the present embodiment, as shown in FIG. 1, the paper feed roller 23 and the paper feed roller
A paper detector 41 is provided for detecting the passage of a sheet and determining a physical quantity such as the length and position of the sheet, and the drive control unit 40 detects the leading end of the continuous sheet 1a
It is formed so as to return to the upstream from the position 1 and wait.

The cut paper discharge roller 6 has a main function of discharging cut paper to the outside of the printer as described above. In order to discharge the continuous paper 1a to the outside of the printer, the cut paper discharge roller 6 is used. It is sufficient even if there is no particular. However, since the printer according to the present embodiment has a configuration in which both the continuous paper 1a and the cut sheet pass through the same conveyance path, the cut sheet discharge roller 6 is replaced by the cut sheet paper. In addition, the continuous paper 1a actually passes. As a result, the cut-sheet discharge roller 6 outputs the continuous sheet 1a.
To assist the discharge of the paper to the outside of the printer.

The cutting means 3 is a movable upper blade which cuts the sheet 1a with a pair of a fixed lower blade 8 fixed at a position shown in the drawing via fixing means not shown and a fixed lower blade 8 which moves up and down. 7 is provided. The movable upper blade 7 is disposed downstream of the fixed lower blade 8 in the sheet transport direction. The movable upper blade 7
Are not shown in the figure. In this embodiment, the blade surface 7a of the movable upper blade 7 is formed on an inclined surface that rises in the transport direction of the paper 1a, and the blade surface 8a of the fixed lower blade 8 also moves in the transport direction of the paper 1a. It is formed on an inclined surface that rises. With this inclined surface structure, the cut printed material located downstream from the cutting position, that is, downstream from the cutting edge 7b of the movable upper blade 7, has a better blade separation from the movable upper blade 7 due to the inclined surface, and the opening 1
7 can be smoothly discharged to the outside of the printer.

Further, in this embodiment, the blade surface 8a of the fixed lower blade 8 is formed with a gentle slope so as to also serve as a guide member for the paper 1a to be conveyed, and the position of the blade edge 8b is exactly the same as the paper 1a. Is formed at the transfer level position. The thickness of the main body of the fixed lower blade 8 is
The movable upper blade 7 is formed to be approximately twice as thick as the thickness of the movable upper blade 7, so that the blade surface 8a can be easily formed on the gentle slope as described above.

In the present embodiment, after the cutting by the cutting means 3, the end of the sheet 1 on the upstream side of the cutting position is prevented from being pulled up while being caught by the movable upper blade 7 moving upward, and returned to the sheet conveying position. A paper return member 9 is provided. The sheet return member 9 is formed so that its action point 10 is located near the blade surface 8a of the fixed lower blade 8 and near the blade edge 7b of the movable upper blade 7 as shown in the drawing. I have. The sheet return member 9 is fixed to the frame 12 at its base end by a mounting piece 11 integral with the main body so that the action point 10 is at the position. By providing the sheet return member 9, the end of the sheet 1a located on the upstream side from the position of the blade edge 7b of the movable upper blade 7 remains caught on the movable upper blade 7 after cutting the continuous sheet. Even if it is pulled up together, the action point 10 of the paper return member 9 immediately removes the end of the paper 1 from the movable upper blade 7,
The end of the sheet 1a can be returned to the correct sheet transport position.

In this embodiment, as shown in the figure, a rotatable wheel 14 is provided for suppressing the curl of the continuous paper 1a caused by the roll paper by a pair with the opposing paper guide supporting member 13. The wheel 14 is formed so as to be held by the paper return member 9 so that the curl of the roll paper can be suppressed without increasing the number of parts. Further, another wheel 15 is provided at a position upstream of the paper guide supporting member 13 as shown in the figure.

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 sheet 1a to the outside. In the present embodiment, the locking member 2
5, a waste material discharge port 27 for guiding waste material (not shown) generated when the continuous paper 1a is cut to the outside of the printer is provided. Reference numerals 28 and 29 indicate an upper wall surface and a lower wall surface of the waste material discharge port 27, respectively. On the back side of the front part 30 of the dedicated cover 16, a wheel 31 which is a driven roller serving as the cut sheet discharge roller 6 is provided above the upper wall surface 28 and slightly above the opening 17. Have been.

Next, the operation of the paper deformation preventing device of the printer with a cutter according to the above embodiment will be described. According to the present embodiment, after printing, the leading end of the continuous paper 1a is returned to a position where it is not deformed even if it is left as it is, and it is made to stand by. Therefore, a specific problem caused by the "deformation" in the paper transport path. As shown in FIG. 2, it is possible to prevent irregularities from occurring in the cut printed material.

Further, the sheet feeding roller 2 at the normal reversing position
3 and the paper feed roller 4, the front end of the continuous paper 1 a is returned to a position upstream of the paper feed roller 4 and downstream of the paper feed roller 23 without being kept on standby. Since the specific problem caused by the “deformation” is only the portion of the paper feed roller, it can be almost ignored, and the occurrence of irregularities in the cut printed material can be prevented. Further, since the leading end of the sheet is disengaged from the sheet feed roller 4, when the roll sheet is replaced, it can be easily removed and the replacement operation can be facilitated.

The leading end of the continuous paper 1a is
In the case where the sheet 3 is held between the separation pad 24 and the separation pad 24, it is possible to prevent the leading edge of the sheet from being carelessly flooded, deformed or damaged.

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 end of the roll paper to an upstream of the paper detector 41. What is formed to wait by
The specific problem caused by the "deformation" can be almost ignored, and it is possible to prevent irregularities from occurring in the cut printed material, and when the printing is resumed, the leading edge 1a of the paper first passes through the paper detector 41. Therefore, the physical quantity such as the length and position of the sheet can be accurately grasped and sent to the sheet feed roller 4 and the printing unit 2, and printing without errors can be easily realized.

[0029]

According to the present invention, after the end of printing, if the leading end of the roll paper is left as it is, it is returned from the position where the paper is deformed to the upstream position and is made to stand by. The specific problem caused by the “deformation” is eliminated, and the occurrence of irregularities in the cut printed matter can be prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an embodiment of a printer with a cutter including a paper deformation preventing device according to the present invention.

FIG. 2 is a perspective view of a printed material obtained by restarting printing after waiting for printing with the cutter-equipped printer according to the embodiment and cutting the print;

FIG. 3 is a front view of the cutting unit, which is a perspective view of a printed material obtained by resuming printing after printing standby in a conventional printer with a cutter and performing print cutting.

[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

Continued on the front page F term (reference) 2C058 AB07 AB18 AF51 LA03 LB09 LC22 2C060 AA08 BC84 3C024 CC01

Claims (4)

[Claims] 1. A paper feed roller, a paper feed roller, and a discharge roller which are sequentially arranged on a paper transport path from an upstream side, a drive control unit for controlling a driving state of each of the rollers, the paper feed roller and a discharge roller The roll paper is reversed in the direction opposite to the winding direction in the middle of the paper transport path, is printed by the printing unit, and is cut and separated for each printed material unit by a cutting unit. The printer with a cutter as described above, wherein the drive control section returns the roller to an upstream position from a position where the paper is deformed if the leading end of the roll paper is left as it is after printing and the rollers are rotated in reverse. A paper deformation preventing device for a printer with a cutter, which is formed so as to be on standby. 2. The driving device according to claim 1, wherein the roll paper is formed so as to be reversed in a direction opposite to a winding direction of the roll paper at a portion of the paper feed roller and the paper feed roller in the paper transport path. The paper deformation preventing device for a printer with a cutter, wherein the control unit is configured to return the leading end of the roll paper to a position upstream of the paper feed roller and downstream of the paper feed roller to be on standby. 3. The drive control unit according to claim 2, wherein
A paper deformation preventing device for a printer with a cutter, wherein a leading end of a roll paper is held by a paper feed roller portion to be on standby. 4. A paper sheet according to claim 2, wherein the passage of the paper sheet between the paper feed roller and the paper feed roller in the paper conveyance path is detected to determine a physical quantity such as the length and position of the paper sheet. A paper deformation preventing device for a printer with a cutter, wherein a detector is provided, and the drive control unit is formed so as to return the leading end of the roll paper to a position upstream of the paper detector and to wait.