KR950007738B1 - Lakel printer and method of label printing - Google Patents

Abstract

No content.

Description

Label Printer and Issuance Method

1 to 12 show a label printer according to an embodiment of the present invention,

1 is a perspective view of the printer.

2 is a front view of the printer with the case removed.

3 is a side view showing a part of the printer in a state in which the case is removed.

4 is a perspective view of main parts of the printer.

5 is a perspective view showing a peeling unit

6 is an exploded perspective view of the peeling unit.

7 is a cross-sectional view showing the mounting process of the peeling unit.

8 is a cross-sectional view of the peeling unit in an operating state.

9 is a cross-sectional view of the peeling unit in a state where the peeling roller is separated from the printing platen roller.

10 is a state in which the label of the printing is temporarily supported.

11 is a schematic view of the state sent back to the site.

12 is a flowchart showing an operation of recognizing and peeling off the printer.

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a label printer for printing a brand name, a bar code, or the like on a label, and more particularly, to a label printer and a method for issuing a label having a peeling device for peeling off the printed label from the sheet.

For example, as disclosed in US Pat. No. 4,639,287, a plurality of labels that print desired information in this type of label printer can be spaced apart as long as they can follow the long direction of the site without overlapping each other on the long site. It is attached. Each label is printed with information as it passes between the thermal head and the printing platen roller. The sheet passing through the printing unit is bent in the peeling plate of the peeling apparatus to be oriented, and the printed label is peeled off from the sheet by moving forward. Moreover, the sheet after peeling off of the label is taken out by being pulled by this feed roller, passing between a pair of feed rollers driven independently of the printing platen.

The printer thus constructed has the following problems. That is, the printing position by the thermal head and the peeling position of the label by the peeling plate are separated only by the predetermined distance A in the configuration of the printer, and this distance cannot be made zero. Incidentally, the interval between the labels placed on the sheet is usually shorter than the interval A. For this reason, in the state where most of the printed labels are peeled off the site, the leading edge of the next label on the site is already beyond the print position and exits to the peeling position side. For this reason, when the labels are not continuously issued, the folded label cannot be printed at the same time during the peeling operation of the preceding label, so that a region cannot be printed on the subsequent label.

Of course, it is conceivable to adjust the tip of the label to be issued next to the printing position by backfeeding the sheet by rotating the printing platen roller and feed roller after issuing the preceding label. However, in this system, it is difficult to achieve rotational synchronization of the printing press roller and the conveying roller driven separately, and it is impossible to expect accurate operation, and the configuration becomes complicated, resulting in high productivity. If the rotation of the printing platen roller and the feed roller are not synchronized, the earth is warped and subsequent printing cannot be performed satisfactorily.

It is also conceivable to provide a one-way clutch to the drive system of the feed roller, and to rotate the feed roller freely in the free state at the time of backfeed of the earth. However, in this method, the sheet is more white than necessary and loosened, and the position of the label and the sheet relative to the printing unit is reversed, so that accurate printing cannot be performed. In addition, the label may be difficult to peel off due to loosening of the sheet. Thus, this method also becomes impractical.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a label printer and a method for issuing a label capable of printing desired information without generating an unprintable area on a label attached to the sheet with a simple configuration. Is in.

In order to achieve the above object, the printer of the present invention has a printing head and a printing platen roller opposite thereto, and printing means for printing on a label pasted side by side in the long direction of the earth on a sheet passing between the printing platen roller and the printing head; Peeling means for peeling off the label from the sheet passing through the printing means, the peeling means is a conveying roller for sending the peeling portion positioned adjacent to the printing means and the land passing through the peeling portion in a tensioned state, the conveying roller is The plate is inserted into the printing platen roller and brought into contact with the plate, and the plate plate roller is rotatable in conjunction with the printing platen roller. Driving means for transferring the board back from the peeling portion toward the printing portion, and at the peeling position. Means for detecting a label peeled off the site with the peeling portion, and the leading edge of the peeled label is detected by the detecting means, and then the absence of the label at the detection position is detected by the detecting means. And a means for controlling the operation of the drive means to permit the conveyance of the earth by the drive means when detected.

According to the printer configured as described above, a plurality of labels attached to the long sheet without overlapping along the long side direction of the sheet are attached to the print head like the sheet by the printing press roller to be rotated to print desired information. The printed label is peeled off the site at the peeling portion of the peeling means. The land drawn from the peeling part is sandwiched between the printing platen roller and the conveying roller adjacent to it, and is conveyed under tension. On the other hand, when the leading end of the peeled label is detected by the detecting means, the printing press platen roller is rotated by a predetermined amount by the control means, and then the driving of the printing press platen roller is stopped. As a result, the label is maintained with only its rear end attached to the sheet. Then, when the label is taken out from the board, the detection means detects the absence of the label. Accordingly, the control means enables post-feeding of the earth by the drive means. That is, the control means drives the driving means immediately after detecting the absence of the label by the detecting means or after the next printing signal is input, and then transfers the site, and then positions the printing board of the label to be printed on the printing means. . As a result, the following printing operation can be performed without generating an unprintable area in the label.

In addition, the feed roller is in contact with the printing platen roller and rotates in synchronization with it. Therefore, the sheet can be easily conveyed without slipping on the sheet and the label. Therefore, printing can be performed on the entire label without compromising printing quality.

EMBODIMENT OF THE INVENTION Hereinafter, the Example of the label printer of this invention is described according to drawing.

As in FIGS. 1 to 3, the label printer has a substantially rectangular box-shaped body case 1, which is integrally formed with a spherical base la and a pair of side walls and an upper wall. If it is detachably installed on the upper side of the U-shaped side plate (2b), and the base (1) is equipped with a removable label and at the same time the printed label passes through the L-shaped first front plate (10b) and And a second front plate 10c formed integrally with the side plate 1b and continuously positioned on an upper portion of the first front plate, and fixed to the base 2 and continuously to the sides of the first and second front plates. The third front plate 10d formed is provided. In Fig. 1, reference numeral 80 denotes an adjuster for inputting printing information into the printer.

The printing mechanism 2 for printing in the main body case 1 is formed, and this mechanism 2 is demonstrated below.

As in FIG. 2 and FIG. 3, the printing mechanism 11 is provided with the main frame 6. As shown in FIG.

The frame 6 is formed by connecting the horizontal bottom plate 3 fixed to the upper surface of the base la of the case 1 and the frame side plates 4 and 5 placed on both left and right ends of the bottom plate. In the present invention in which the two frame side plates 14 and 15 stand vertically and are disposed to face each other, a supporting portion is formed.

The printing mechanism 2 has a printing platen unit 11 which is arranged between the frame side plates 4 and 5 so as to be rotatably supported by these side plates 4 and 5. have. The printing platen unit 11 is formed of the support shaft 12, the two end plates 13, the printing platen roller 14, the intermediate shaft 15, and the unmarked earth spring.

The support shaft 12 is installed horizontally between the frame side plates 4 and 5, and both ends thereof are fixed to the side plates 4 and 5, respectively, and are non-rotable. The support shaft 12 also serves as a first mounting shaft for mounting the peeling device 61 described later. The two end plates 13 formed to face each other have a flat plate structure and are disposed adjacent to the side plates 4 and 5, respectively. In addition, the rear ends of these end plates 13 are freely attached to the support shaft 12, respectively, and are rotated arbitrarily for each of the support shafts.

Bearings not shown are mounted at the front end of each end plate 13, and the bearings are supported through the printing press shaft 14a of the printing press roller 14, so that the printing press roller 14 is both end plates. It is hypothesized substantially horizontally between the front end parts of (13). A driven gear 7 (see FIG. 2) is fixed to one end of the printing platen roller 14. The driven gear 7 is connected to a paper feed mechanism having a forward / reversely rotatable step motor 8 fixed to the side plate 4 and a power transmission mechanism not shown, and is driven in conjunction with the transfer mechanism. The intermediate shaft 13 is positioned between the support shaft 12 and the printing platen roller 14 and is horizontally provided between the pair of end plates 15.

The intermediate shaft 15 also serves as a second mounting shaft for mounting the peeling device 61. The peeling plate 16 is located adjacent to the front of the printing press plate roller 14, and is constructed over the front-end | tip part of a pair of end plates 13. As shown in FIG.

The torsion spring wound around the support shaft 12 is hooked to an unillustrated spring bearing fixed at one end thereof to the support shaft 12, and the other end is attached to the intermediate shaft 15 from its lower side. Due to the elasticity of this torsion spring, portions other than the support shaft 12 of the printing platen unit 11 are supported upward. Therefore, the printing platen roller 14 is attached below the riser thermal head 29 mentioned later. In addition, the portions other than the support shaft 12 of the printing platen unit 11 resist rotation of the torsion springs so as to rotate the support shaft 12 downwardly by manual or automatic control.

The head frame 21 is arranged above the printing platen unit 11. The mounting structure of the frame 21 is as shown in FIG. 2 and FIG. That is, the rear end of the head frame 21 is fitted with the fixed shaft 22 which protrudes from the side plate 4 toward the side plate 5 side. The support pin 23 protrudes in front of the end wall at the side of the side plate 4 in the head frame 21, and is fitted into the unshown through hole formed in the side plate 4. The tip end portion of the fixed shaft 22 protrudes from the end wall on the side plate 5 side of the head frame 21, and at the same time, the support pin 24 protrudes from the front end of the end wall. The distal end portion of these fixed shafts 22 and the support pins 24 are fitted into holes, not shown, with clamp pins 25 supported on the side plates 5 and supported by clamp plates.

In this way, the head frame 21 is supported at one end thereof on the side plate 4 through the support shaft 22 and the support pin 23, and the other end thereof is the front end and the support pin 24 of the support shaft 22. Both sides are supported by being supported by the clamping plate 25 of the side plate 5 through the through-hole. 26 is a hinge shaft of the clamp plate 25, and 27 is a fastening hole. A fastening plate 28 made of leaf springs mounted on the upper surface of the head frame 21 is fastened to the fastening hole 27 so that it can be inserted.

The support state of the head frame 21 is maintained by the engagement of the clamping plate 25 of the mounting plate 28. Accordingly, the side plate of the head frame 21 is rotated by pushing down the tip portion 28a of the mounting plate 28 in the direction of arrow 2 in the second direction, and then rotating the clamp plate 25 downward in the direction of arrow 2 in the second degree. 12) side can be released. In this state, the head frame 21 can be pulled out of the frame 6 to the right.

In the head frame 2l, a line thermal head 29 is mounted and extends in parallel with the printing platen roller 14. The head 29 is attached with a printing platen roller 14 at its lower side. Guide rollers 30 are freely mounted on the support shaft 22 supporting the head frame 21 as shown in FIG.

On the upper end of the side plate 4, as shown in Figs. 2 and 3, a ribbon driving device 31 is mounted. This driving device 31 is operated by the driving force of the above-mentioned paper conveying mechanism (not shown). The ribbon drive device 31 has an input gear 32, a drive belt mechanism 33, a drive gear 34, a driven gear 35, and a tension pulley 36 connected to a paper feed mechanism via a driven gear 7. In this way, the upper and lower rotary shafts 37 and 38 as in FIG. 2 rotate. The drive gear 31 has a pair of rotary shafts similar to these in addition to the rotary shafts 37 and 38.

The ribbon device mounting portion 41 located above the head frame 21 is fixed to the side plate 4. This mounting portion 41 has a fixed guide 42 extending in parallel with the printing platen roller 14 having one end fixed to the side plate 4 as shown in FIG. 4, and the printing platen roller on the guide 42. And a slider 43 mounted freely along the axial direction. A pair of engaging pins 44 protrude from the upper surface of the slider 43.

The ribbon unit 45 is mounted on the ribbon device mounting portion 41 so that the ribbon unit 45 can be peeled off. The ribbon unit 45 has a ribbon support frame 46 as in FIGS. 2 and 3, which frame the left and right pairs of side plates 46a and the horizontal temporary axis 47 and the horizontal temporary plate 48. It is connected by). The ribbon driving shaft 49 and the ribbon guide shaft 50 are horizontally arranged between the side plates 46a, respectively, and the ribbon supply shaft 51 and the ribbon winding shaft 52 are horizontally freely rotated above them. It is hypothesized. The ribbon drive shaft 49 and the ribbon guide shaft 50 are fixed to the frame 46 so as to be detachable. The ribbon supply shaft 51 and the ribbon winding shaft 52 can be peeled off with respect to the frame 46.

This ribbon unit 45 can be attached to the ribbon attaching part 41 in the following order. First, while placing the horizontal temporary plate 48 of the frame 46 on the slider 43, the engaging pin 44 of the mounting portion 41 in the large diameter portion of the pit hole 48a formed in the horizontal temporary plate Insert it through.

Thereafter, the ribbon unit is slightly moved on the side plate 4 side to engage the engagement pin 44 in the small diameter portion of the pit hole 48a. Thereby, the ribbon unit 45 is attached to the ribbon attaching part 41 in the state which prevented peeling to the upper side. And the ribbon unit 45 is arrange | positioned at the predetermined position in the main frame 6 as it moves to the side plate 4 side like the slider 43. As shown in FIG. In addition, this mounting state is maintained by the pin spring fastening member 53 fixed to the fixing guide 42 being hooked on the side plate 46a on the side plate 5 side of the ribbon supporting frame 46. When the ribbon unit 45 is arrange | positioned in the above position as mentioned above, the edge part of the shaft 49-52 is fitted in connection with each rotating shaft 37 and 38 of the ribbon drive device 31. As shown in FIG.

As shown in FIG. 1, a long and thin site C is supported in a rolled state on a roll in a paper holder 82, which is not shown, formed on the rear surface of the main body case 1. As shown in FIG. On one surface of the site C, a number of labels L are attached at equal intervals in the longitudinal direction of the site. The site C is released from the paper holder 82, and is set between the printing press roller 14 and the line thermal head 29 to transfer the paper appropriately by the operation of the paper conveying mechanism.

Simultaneously with this paper transfer, the ribbon drive device 31 is operated in synchronization. Then, the transfer ribbon 54 wound around the ribbon supply shaft 52 by the rotational force transmitted to the ribbon drive shaft 49 is taken out via the ribbon guide shaft 50. At the same time, the used portion of the transfer ribbon 54 which has passed between the printing platen roller 14 and the line thermal head 29 is wound on the ribbon winding shaft 51 by the rotational force transmitted to the ribbon winding shaft 51. . The amount sent to the transfer ribbon 54 and the amount sent to the sheet C are set in the same manner, and the ink of the transfer ribbon 54 is thermally transferred to the label L by the printing operation of the thermal head 29.

When the ribbon unit 45 is peeled off against the main frame 6, the clamp plate 25 is rotated in the direction of the second arrow B, the head frame 21 is held on one side, and then printed manually. The platen unit 11 is lowered so that the printing platen roller 14 is separated from the line thermal head 29. In this state, the transfer ribbon 54 is pulled out or sandwiched between the printing platen roller 14 and the line thermal head 29 on the side plate 5 side.

Next, the peeling apparatus 61 is demonstrated along FIG. 2 thru | or FIG. This apparatus 61 is used for peeling off the label L printed on the sheet C in cooperation with the peeling plate 16 as a peeling part attached to the printing platen unit 11.

The peeling device 61 includes a peeling frame 62, a support shaft 63, a peeling roller 64 as a feed roller, a pressing shaft 65, a pair of support plates 66, a pair of hook members 67, A pair of first torsion springs 68, a pair of second torsion springs 69, and the like are unitized.

The peeling frame 62 is comprised by the horizontal temporary plate 62b etc. integrally with the pair of arms 62a and those which connected the front end of arm to each other. In the longitudinal center portion of the horizontal temporary plate 62b, a claw-like operation portion 70 protrudes integrally toward the front. The support shaft 63 is disposed below the support shaft 12 and the intermediate shaft 15 and extends in parallel with these axes, and the left and right arms 62a are rotatably fitted to both ends of the support shaft 63, respectively. It is aligned. Therefore, the peeling frame 62 is rotatably supported by the support shaft 63 along the axis circumferential direction, and the horizontal temporary plate 62b extends in parallel with the support shaft 63. In addition, 75 of FIG. 4 thru | or 5 show the stop ring for supporting the movement of the peeling frame 62 of the axial direction of the support shaft 63. As shown in FIG. The pressing shaft 65 is located between the horizontal temporary plate 62b and the support shaft 63, and is horizontally installed between the left and right arms 62a. The peeling roller 64 is horizontally interposed between the front part of the arm 62a, and is supported freely and in parallel with the printing platen roller 14. In addition, a support recess 62c having an opening in the upper portion is formed in the front portion of each arm 62a, and the shaft end of the peeling roller 64 is fitted to the recess so as to be detachable.

The pair of support plates 66 are fitted to both ends of the support shaft 63, respectively. These support plates 66 are flat and protrude toward the rear of the support shaft 63. Each base 66 has a recess 71 at its rear portion, and has an upwardly mounted protrusion 72 at its front portion. The concave portion 71 is formed in a semicircle shape having a diameter substantially the same as that of the support shaft 12, but is not limited thereto and may be formed in a cross-sectional spherical shape. The front end of the mounting protrusion 72 is an engagement surface 72a of an inclined top surface, and the rear surface 72a is gradually inclined back toward the upper end of the mounting protrusion 72. That is, the engagement surface 72a is inclined so that the space | interval of the recessed part 71 and the engagement surface 72a may become large as it goes to the support shaft 63 at the front-end | tip of the protrusion part 72. As shown in FIG.

The pair of hook members 67 are also flat, and they are rotatably fitted to both ends of the support shaft 63, respectively. Each hook member 67 is comprised of the hook 73 located above the support shaft 63, and the operation part 74 located below the support shaft.

Each first torsion spring 68 is positioned between the arm 62a and the support plate 66 and wound around the support shaft 63. One end of this spring 68 is hooked below the pressing shaft 65, and the other end of the same spring 68 is screwed to the support plate 66. The first torsion spring 68 is urging the peeling roller 64 upward through the pressing shaft 65 and the peeling frame 62. Therefore, the peeling roller 64 is pushed against the printing platen roller 14 from the lower side by this elasticity.

Each second torsion spring 69 is located between the support plate 66 and the hook member 67 and wound around the support shaft 63. One end of the spring 69 is hooked on the support plate 66, and the other end of the spring 69 is hooked on the hook member 67. Accordingly, these second torsion springs 69 hold the hook member 67 in the direction of arrow 6 of the sixth degree, that is, the torque position direction, by its elastic force.

The peeling apparatus 61 of the said structure is arrange | positioned between the side plates 4 and 5 of the main frame 6, and is attached so that it can be attached to the printing platen unit 11 by the following procedure.

First, as shown in FIG. 7, the recesses 71 of the pair of support plates 66 are engaged with the support shaft 12 from the front side, respectively. Then, the entire peeling device 61 is pushed up in the direction of the arrow E in the seventh direction with respect to the support shaft 12 while keeping the engagement between the recess 71 and the support shaft 12. Since the upward rotation is provided with support plates 66 engaged with the support shaft 12 at both ends of the peeling device 61, the entire peeling device 61 is stabilized without flowing with respect to the support shaft 12.

Thus, as shown in FIG. 8, the mounting protrusion 72 of each support plate 66 enters between the support shaft 12 and the intermediate shaft 15, and then the engaged engagement piece 72a is intermediate. It hangs on the back peripheral surface of the shaft 15. The engagement between the intermediate shaft 15 and the support surface 72a becomes stronger as the support plate 66 moves upward, and at the same time, the engagement between the recess 71 and the support shaft 12 is caused by the reaction. At the same time it becomes stronger. In this way, the portion between the inner concave portion 71 and the paper surface 72a of the support plate 66 is sandwiched between the support point shaft 12 and the intermediate shaft 15 in the front-rear direction.

At the same time, according to the upward rotation of the support plate 66, the hook member 67 is in contact with the rear circumferential surface of the intermediate shaft 15 as the front edge of the hook 73 is as shown in FIG. ) Is bent and displaced upwards. For this reason, immediately after the hook 73 is moved to the upper side of the intermediate shaft 15, the hook member 67 is rotated counterclockwise in the seventh direction about the support shaft 63 with the elasticity of the second torsion spring 69. Rotate to Accordingly, as shown in FIG. 8, the hook 73 is engaged with the intermediate shaft 15 from above.

As described above, the operation of bringing the recess 71 of the support plate 66 with the peeling device 61 into contact with the support shaft 12 causes the peeling device 61 to rotate upward about the support shaft 12. In one operation, the peeling device 61 can be easily attached to the printing platen unit 11 of the printing mechanism 2 by using the support shaft 12 and the intermediate shaft 15.

This mounting state is shown in FIG. In this state, the support plate 66 is regulated by the support shaft 12 and the intermediate shaft 15 in the front-rear direction, and is engaged with the support shaft 12 of the recess 71 and the middle of the hook 67. The movement in the vertical direction is restricted by the locking on the shaft 15. The peeling roller 64 is located in parallel with the printing platen roller 14 and is attached to the printing platen unit by a spring 68.

In order to repair the peeling device 61 or the like, when the device 61 is detached from the printing platen unit 11, first, by pressing the operating portion 74 of the hook member 67 in the direction of the arrow F in the eighth direction. The hook member 67 is rotated clockwise to remove the hook 73 from the intermediate shaft 15. Then, the peeling device 61 may be pulled down while being rotated downward with respect to the support shaft 12. In this way, the engagement surface 72a of the mounting protrusion 72 is removed from the intermediate shaft 15, and the recess 71 is detached from the support point 12. As shown in FIG. That is, the peeling apparatus 61 can be removed easily by the above procedure.

As shown in FIG. 8, in front of the peeling plate 16, the sensor 80 which detects the label L peeled off from the board | substrate C is formed. The sensor 80 has a light emitting element 80a and a light receiving element 80b provided to face each other, and the peeled label L passes between these elements. The sensor 80 is connected to a control unit 83 that controls the drive of the motor 8 of the paper feed mechanism, and sends a detection signal to this control unit.

Next, a process of issuing a label with the peeling device 61 attached to the printing platen unit 11 as shown in FIG. 8 will be described. Prior to label issuance, site C's set up is: First, the sheet C is passed between the printing platen roller 14 and the line thermal head 29 and the sheet C is guided to the lower side of the printing platen roller 14 via the peeling plate 16. do. Then, the operation unit 70 of the peeling frame 62 is pushed down by hand, and the peeling frame 62 is rotated downward by resisting the elastic force of the first torsion spring 68 as shown in FIG. This causes the peeling roller 64 to fall off the printing platen roller 14, thereby passing the tip of the sheet C between the rollers 14 and 64, and at the same time, peeling the sheet C. Follow the rear part of and pass the peeling frame (62). Then, the peeling frame 62 is pushed down. In this way, as shown in FIG. 8 by the elastic force G of the first torsion spring 68, the peeling roller 64 is pressed against the printing platen roller 14 by pressing the mount C below. After this set operation, the label issuing operation described above is performed. Incidentally, the printing operation and the label ticketing operation are performed by the control unit 83 in accordance with the flowchart shown in FIG.

First, the motor 8 of the transfer mechanism is driven forward by the control unit 83, and the transfer ribbon and the ground C are synchronously transferred in the same direction. Thus, the peeling of the label and the label to the label C are executed continuously.

That is, with the power of the paper feeder, the printing platen roller 14 is rotated in the direction of arrow H in FIG. 8, and the sheet C wound around it is sent forward, and the leading label on the sheet is acted upon by the printing head 29. Desired information is printed in Ll. At the same time, the peeling roller 64 attached to the printing platen roller 14 through the sheet C rotates in synchronism with the printing platen roller 14. In this way, the earth C is strongly pulled by the peeling roller 64, and is bent sharply to the boundary of the peeling plate 16 and sent to the lower side. For this reason, since the label Ll of the printing pen stuck to the board | substrate C is going to advance in a straight line without wrinkle at the position of the peeling board 16, it peels off at the board | substrate C at the position of a peeling board.

The label Ll peeled off the sheet C is sent forward through the light emitting element 80a of the sensor 80 and the light receiving element 80b. When the front end of the label L1 peeled off by the sensor 80 is detected, the control unit 83 causes the print platen roller 14 to rotate after a predetermined amount after the front end of the label Ll is detected, that is, the ground C is predetermined. After the road has been moved forward, the motor 8 is stopped. In this state, as in FIGS. 8 and 10, most of the label Ll is peeled off the sheet C, and only the rear end is attached to the sheet and temporarily held. Then, the label Ll is issued out of the site C by the user. If the label Ll is out and is out of the element 80a, 80b of the sensor 80, the sensor detects no label and sends a detection signal to the control unit 83.

In the case of printing the same upward on a plurality of labels and gradually issuing these tickets, the site C is intermittently forwarded without sending back. As a result, subsequent labels are printed in sequence when passing the printing position P1 between the thermal head 29 and the printing platen roller 14, and then issued.

On the other hand, when issuing the label L individually, the printer operates as follows.

That is, in the state where the preceding label L1 is temporarily held as in FIGS. 8 and 10, the leading end of the subsequent label L2 is advanced beyond the printing portion Pl. For this reason, when the printing operation is started in this state, the printing non-printing region is generated at the tip of the label L2 without printing. Thus, when the preceding label Ll is peeled off the site C and no label is detected by the sensor 80, the control unit 83 immediately reverse-drives the motor 8 for a predetermined time. Thereby, the printing platen roller 4 and the peeling roller 64 adjacent to it are inverted, and the sheet C is sent backward until the tip of the label L2 coincides with the printing apparatus Pl as shown in FIG. Here, the feed amount D1 of the site C is set to D1 = (D2-G) when the distance between two adjacent labels as shown in FIG. 1 is G, and the distance between the printing position P1 and the base of the label L1 is D2. have. Then, when the printing signal is input to the control unit 83, the control unit 83 drives the motor 8 in the forward rotation again. Accordingly, the above printing operation and peeling operation are performed on the label L2.

Incidentally, in the above description, the case where the label C is detected by the sensor 80 and immediately after the artboard C is sent back is shown. However, the label printing is not limited by the sensor. After input, it is also possible to carry out the operation sent to the back.

Further, even when a plurality of labels are issued in succession, the label may be sent to the back of the sheet for each ticket issued.

Even in the case of intermittently printing and issuing a label by the label printer configured as described above, it is configured to detect the ticketing of the preceding label and then send the board back until the end of the subsequent label matches the printing device. . For this reason, the printing nonprinting area in a label can be made small, and the whole surface of a label can be used effectively for printing.

In addition, the operation of the sheet feeder is stopped when the label generating operation is stopped. Since the peeling roller 64 is driven to rotate in contact with the printing platen roller 14 as described above, the rotation of the peeling roller is also stopped in synchronization with the stop of the printing platen roller 14. For this reason, after the rotation of the printing platen roller 14 is stopped, only the peeling roller 64 continues to rotate, and therefore, the earth C is moved by the peeling roller 64, and there is no case of being wrinkled. By preventing the earth C from deviating from the predetermined stop position in this way, the tip of the next label can be precisely aligned with the printing position when sent to the back of the earth. As a result, printing can be performed at the normal position of the label, and there is no hassle of adjusting the position of the site C by performing a preliminary test to obtain the printing at this normal position, thereby improving handling.

In addition, the peeling roller 64 is attached to the printing platen roller 14 through the mount C, and is driven and rotated by the printing platen roller. For this reason, it is not necessary to install the dedicated drive source only to rotate the peeling roller 64, and the whole premise of the peeling device 61 can be reduced in weight and size.

Claims (9)

Printing means having a printing head and a printing platen roller frame opposite to the printing head, the printing means for printing on a label placed side by side in the longitudinal direction of the sheet on a sheet passing through the printing position between the printing platen roller and the printing head; Peeling means for peeling off the label from the sheet passing through the printing means, the peeling means is a peeling roller positioned adjacent to the printing means, the peeling roller for sending the sheet passing through the peeling portion in a state in which the tension is applied, the peeling roller The transfer sheet is transferred to the printing platen roller, and rotatable in conjunction with the printing platen roller; Driving means for forwarding the printing platen roller forward to the peeling part from the printing means, and simultaneously driving the printing platen roller back to the printing part from the peeling part; Means for detecting a label peeled from the sheet at the peeling portion at a detection position adjacent to the peeling portion; Controlling the operation of the driving means to allow the label to be sent up the earth by the driving means when the peeled label is detected by the detecting means and then when the absence of the label at the detection position is detected by the detecting means. Label printers, including means. The label printer according to claim 1, wherein said control means has means for stopping the forwarding of said sheet after said printing press platen roller is rotated a predetermined amount after the leading edge of the peeled label is detected by said detecting means. 2. The control apparatus according to claim 1, wherein said control means actuates said driving means immediately when the absence of a label is detected by said detecting means to send said artboard back until the leading end of the label to be printed next coincides with said printing position. Label printer with means. 2. The control means according to claim 1, wherein the control means operates the driving means when the absence of the label is detected by the detecting means, and then receives the next printing signal so that the tip of the label to be printed next coincides with the printing position. Label printer with means sent back until done. The label printer according to claim 1, wherein the printing position, the peeling portion, and the detection position are aligned substantially linearly, the contact position of the printing platen roller and the peeling roller, and the peeling portion are aligned in the direction crossing the straight line. The label printer according to claim 1, wherein the peeling roller is disposed in parallel with the printing press roller, and the peeling means has a means for pressing the printing press roller on the peeling roller. 7. The printing apparatus according to claim 6, wherein the printing means includes means for supporting the printing platen roller so as to be in contact with and detached from the printing head, and means for pushing the printing platen roller onto the printing head, wherein the peeling means comprises Label printers detachable from support means. 8. The label printer according to claim 7, wherein the peeling part has a peeling plate attached to the supporting means and extending in parallel with the printing press roller. A process of sending a long thin strip of paper with a plurality of labels side-by-side in a longitudinal direction through the printing unit; and a step of printing information on the label in the printing unit; and a label printed on the sheet passing the printing. A step of peeling off, a step of detecting the label peeled off from the sheet at the detecting section, and the absence of the separated label is detected at the detecting section, and then the tip of the label to be printed next reaches the printing section. The label issuing method of a label printer having a process of sending the site back until it is.