JP2006007672A - Printing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printing apparatus capable of preventing the occurrence of defective peeling without causing slack in a belt-like mount folded by a peeling plate at the time of backfeed.
SOLUTION: During feeding, the rotational power of a platen roller 6 is transmitted to a feed roller 9, and during back feeding, a one-way hinge 94 that interrupts transmission of rotational power from the platen roller 6 to the feed roller 9, and a back of the belt-like mount A torque limiter 92 that gives a certain amount of torque to the rotation of the feed roller 9 accompanying the feed is mounted on the feed shaft 91 of the feed roller 9, and at the time of feeding, the platen roller 6 and the feed roller 9 are connected in the feed direction. At the time of back feed, only the platen roller 6 is driven to rotate in the back feed direction, and a certain amount of torque is applied to the rotation of the feed roller 9 accompanying the back feed of the belt-like mount.
[Selection] Figure 2

Description

  The present invention relates to a printing apparatus that performs printing on a continuous label body in which labels are temporarily attached to a belt-like mount at intervals, and more particularly to a printing apparatus having a peeling mechanism that peels off a label after printing from the belt-like mount.

  2. Description of the Related Art Conventionally, there is a printing apparatus that performs printing on a continuous label body in which labels are temporarily attached to a belt-like mount with a separation mechanism that peels the printed label from the belt-like mount. In the printing apparatus having such a peeling mechanism, while the label continuous body is sandwiched between the platen roller and the thermal head and conveyed, printing is performed on the label temporarily attached to the label continuous body, and a strip-shaped mount is provided on the release plate. Is folded in a direction away from the label, and the folded strip is sandwiched between a feed roller and a pinch roller, and the printed label is peeled off from the strip.

  The platen roller that sandwiches and conveys the label continuum between the thermal head and the feed roller that sandwiches and conveys the belt-like backing sheet between the pinch rollers is connected by a rotational power transmission means such as a timing belt. In general, the direct drive is performed by the same drive source. When the transport speed of the label continuous body by the platen roller, that is, the peripheral speed of the platen roller is “1”, the transport speed of the belt-like mount by the feed roller, In other words, the peripheral speed of the feed roller is set to about “1.1”, which is faster than the conveyance speed of the continuous label by the platen roller. By applying tension to the belt-like backing sheet folded by the release plate, The label after printing can be peeled off from the belt-like mount (for example, see Patent Document 1).

However, in the prior art, the peripheral speed of the feed roller is set to be higher than the peripheral speed of the platen roller. Therefore, when the label length is long, the continuous feed of the label is conveyed more than necessary by the feed roller, and the print elongation is increased. At the time of backfeeding, the peripheral speed of the feed roller is set faster than the peripheral speed of the platen roller. Since the peeling operation is started after the generated slack is removed, there is a problem that a peeling failure occurs.
Japanese Patent Laid-Open No. 10-101047

  The present invention has been made in view of such problems, and the object of the present invention is to provide a continuous label by the feed roller even if the peripheral speed of the feed roller is set higher than the peripheral speed of the platen roller. Printing that can prevent the occurrence of printing elongation without being transported as above, and can prevent the occurrence of defective peeling without causing slack in the strip backing folded by the peeling plate even during backfeeding. The point is to provide a device.

In order to solve the above problems, the present invention has the following configurations.
The gist of the invention described in claim 1 is that a platen roller that conveys a label continuous body on which a label is temporarily attached to a belt-like mount and a label continuous body sandwiched between the platen roller, A printing apparatus comprising: a thermal head that performs printing; a peeling plate that folds the label continuum and peels the label after printing from the belt-like mount; and a feed roller that conveys the belt-like backing folded by the peeling plate When feeding the label continuum, the platen roller and the feed roller are connected to rotate in the feed direction, and when feeding the label continuum, only the platen roller is fed. Is rotated in the back feed direction, and a certain amount of torque is applied to the rotation of the feed roller accompanying the back feed of the belt-like mount. It consists in printing apparatus characterized by giving.
According to a second aspect of the present invention, when the label continuous body is fed, rotational power is transmitted to the feed roller, and when the label continuous body is back-fed, rotation to the feed roller is performed. A one-way hinge for interrupting transmission of power and a torque applying means for applying a constant amount of torque to the rotation of the feed roller accompanying back feed of the belt-like mount are provided around the feed shaft of the feed roller. It exists in the printing apparatus of Claim 1.
The gist of the invention of claim 3 is that, when the one-way hinge feeds the label continuous body, the feed roller is likely to transport the label continuous body beyond the transport speed of the platen roller. The printing apparatus according to claim 2, wherein transmission of rotational power from the platen roller to the feed roller is interrupted.

  The printing apparatus of the present invention connects the platen roller and the feed roller to feed the label continuous body and rotationally drives it in the feed direction. When back feeding the label continuous body, only the platen roller is backed. It is configured to rotate in the feed direction and to apply a certain amount of torque to the rotation of the feed roller accompanying the back feed of the strip mount, so that a predetermined tension is applied to the strip mount folded by the peeling plate even during back feed. Therefore, it is possible to prevent the occurrence of defective peeling without causing slack in the belt-like mount folded by the peeling plate.

  Furthermore, in the printing apparatus of the present invention, when feeding the label continuous body, if the label continuous body is likely to be transported beyond the transport speed of the platen roller by the feed roller, the rotational power is transmitted from the platen roller to the feed roller. Even if the peripheral speed of the feed roller is set to be higher than the peripheral speed of the platen roller, the feed roller will feed the label continuous body over the transport speed of the platen roller. Since the rotation of the roller is stopped, there is an effect that it is possible to prevent the occurrence of printing elongation without the label continuum being conveyed more than necessary by the feed roller.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic configuration diagram showing a configuration of an embodiment of a printing apparatus according to the present invention, FIG. 2 is a diagram showing a configuration for driving a platen roller and a feed roller shown in FIG. 1, and FIG. FIG. 4 is a perspective view showing a configuration for driving the feed roller shown in FIG. 1, and FIG. 4 is a cross-sectional view showing a configuration for driving the feed roller shown in FIG.

  The present embodiment is a printing apparatus that prints on a label 1 while conveying a continuous label 3 on which a label 1 is temporarily attached to a belt-like mount 2 with reference to FIG. Label supply shaft 4 on which the label continuous body 3 is rotatably mounted, a guide roller 5 for guiding the conveyance of the label continuous body 3 fed from the label supply shaft 4, and a platen roller for conveying the label continuous body 3. 6 and the platen roller 6 with the label continuum 3 sandwiched between the thermal head 7 for printing on the label 1 and the printed label continuum 3 (band-shaped mount 2) folded back to label 1 from the band-shaped mount 2 The peeling plate 8 that peels off the sheet, the feed roller 9 that conveys the belt-like mount 2 folded back by the peeling plate 8, the pinch roller 10 disposed so as to face the feed roller 9, and the label 1 are peeled off. Winding the strip-shaped mount 2 consists of the backing sheet winding shaft 11 Metropolitan.

  Referring to FIG. 2, the platen roller 6 is rotatably supported by the right side plate 12 and the first left side plate 13 by a platen shaft 61, and a platen shaft 61 extending from the first left side plate 13 is supported by a platen pulley. 62 is ringed. A first timing belt 15 is stretched between the platen pulley 62 and a rotating shaft of a motor (not shown), and the platen roller 6 is fed in the feed direction (counterclockwise in FIG. 1) by the rotation of the motor (not shown). And it is the structure rotated in the back feed direction (clockwise in FIG. 1).

  2 and 3, the feed roller 9 is rotatably supported on the right side plate 12 and the second left side plate 14 by a feed shaft 91. The feed shaft 91 includes a torque limiter 92, a one-way hinge, and the like. 94.

  Referring to FIG. 4, the torque limiter 92 includes an outer ring 921 fixed to the second left side plate 14, and a feed shaft 91 penetrating the inner ring 922, and rotation of the feed shaft 91 (feed roller 9). That is, a certain amount of load (torque) is generated in the rotation of the inner ring 922, and when a torque exceeding the set torque is applied to the rotating inner ring 922, the transmission force is cut off and the inner ring 922 is in a free state (a state where no torque is generated). Is configured to be rotated.

  The one-way hinge 94 is a hinge that functions as a one-way clutch and a torque limiter. Referring to FIG. 4, a feed shaft 91 is passed through the inner ring 942, and a feed pulley 93 is wrapped around the outer ring 941. The second timing belt 16 is stretched between the feed pulley 93 and the platen pulley 62 so that the platen pulley 62 and the feed pulley 93 (outer ring 941) are connected and rotated. It has become.

  When the outer ring 941 is rotated in the direction in which the feed roller 9 is rotated in the feed direction (counterclockwise in FIG. 1), the one-way hinge 94 rotates the inner ring 942 along with the rotation of the outer ring 941, When the outer ring 941 is rotated in the direction of rotating in the back feed direction (clockwise in FIG. 1), only the outer ring 941 is rotated and the inner ring 942 is not rotated together with the outer ring 941. Further, when the outer ring 941 is rotated in the direction in which the feed roller 9 is rotated in the feed direction, if a torque exceeding the set torque acts on the rotating outer ring 941, the transmission force to the inner ring 942 is cut off, and the outer ring 941 is cut off. Is configured to rotate in a free state (a state where no torque is generated).

  When the continuous label 3 is fed to print on the label 1 temporarily attached to the belt-like mount 2, the rotational power for rotating the platen roller 6 in the feed direction is rotated by a motor (not shown) by the first timing belt 15. When the platen roller 6 is transmitted from the shaft to the platen pulley 62, the platen roller 6 rotates in the feed direction, and the label continuous body 3 is sandwiched between the platen roller 6 and the thermal head 7 and printed while being conveyed (feed). Rotational power for rotating the feed roller 9 in the feed direction is transmitted from the platen pulley 62 to the feed pulley 93 (outer ring 941) by the second timing belt 16, and the inner ring 942 is rotated along with the rotation of the outer ring 941. A belt-like platform in which the roller 9 rotates in the feed direction and is folded back by the peeling plate 8 2 to convey the nipped by the feed roller 9 and the pinch roller 10.

  When the transport speed of the label continuous body 3 by the platen roller 6, that is, the peripheral speed of the platen roller 6 is “1”, the transport speed of the belt-like mount 2 by the feed roller 9, that is, the peripheral speed of the feed roller 9 is determined by the platen roller 6. It is set to about “1.1”, which is faster than the conveyance speed of the label continuous body 3, and by applying tension to the belt-like backing sheet 2 folded back by the peeling plate 8, the label 1 after printing is striped by the peeling plate 8. It can be peeled from the mount 2.

  Since the peripheral speed of the feed roller 9 is set higher than the peripheral speed of the platen roller 6, the label continuous body 3 is conveyed more than necessary by the feed roller 9 when the label length is long, that is, by the platen roller 6. Although there is a possibility that the printing speed is increased by exceeding the conveyance speed, in this embodiment, the one-way hinge 94 prevents the continuous label body 3 from being conveyed more than necessary by the feed roller 9. . In other words, the set torque of the one-way hinge 94 is set lower than the torque that acts on the outer ring 941 when the continuous label body 3 is about to be conveyed more than necessary by the feed roller 9, and the continuous label is fed by the feed roller 9. When the body 3 is about to be conveyed more than necessary, the torque acting on the outer ring 941 exceeds the set torque, the transmission force to the inner ring 942 is cut off, and the outer ring 941 rotates in a free state (a state where no torque is generated). Therefore, the rotation of the feed roller 9 is stopped, and the feed roller 9 prevents the continuous label body 3 from being conveyed more than necessary.

  The set torque of the one-way hinge 94 is set higher than the set torque of the torque limiter 92, and the rotation of the feed roller 9 in the feed direction is not hindered by the torque limiter 92.

  When the label continuous body 3 is back-feeded for the next printing, the rotational power for rotating the platen roller 6 in the back-feed direction is transferred from the rotating shaft of the motor (not shown) to the platen pulley 62 by the first timing belt 15. By being transmitted, the platen roller 6 rotates in the back feed direction, and the continuous label 3 is sandwiched between the platen roller 6 and the thermal head 7 and conveyed (back feed). When the label continuous body 3 is back-fed, the belt-like backing sheet 2 sandwiched between the feed roller 9 and the pinch roller 10 is also back-fed, and the feed roller 9 is back-fed along with the back-feeding of the belt-like backing sheet 2. Rotated in the direction. At this time, a certain amount of torque is applied to the rotation of the feed roller 9 by the torque limiter 92 to prevent the back-feed belt-like mount 2 from being slackened.

  The rotational power for rotating the feed roller 9 in the backfeed direction is transmitted from the platen pulley 62 to the feed pulley 93 (outer ring 941) by the second timing belt 16, but only the outer ring 941 rotates in the one-way hinge 94. As a result, the inner ring 942 does not rotate with the outer ring 941, so that no rotational power is transmitted to the feed roller 9.

  As described above, according to the present embodiment, when the continuous label body 3 is fed, the platen roller 6 and the feed roller 9 are coupled and driven to rotate in the feed direction so that the continuous label body 3 is backed. When feeding, only the platen roller 6 is driven to rotate in the back feed direction, and a certain amount of torque is applied to the rotation of the feed roller 6 accompanying the back feed of the belt-like backing sheet 2, so In addition, since a predetermined tension can be applied to the belt-like backing sheet 2 folded back by the peeling plate 8, the belt-like backing paper 2 folded by the peeling plate 8 is not slackened, and the effect of preventing the occurrence of peeling failure. Play.

  Furthermore, according to the present embodiment, when the label continuous body 3 is fed by the feed roller 9 beyond the transport speed of the platen roller 6 when the label continuous body 3 is fed, the platen roller 6 feeds the feed roller. Even if the peripheral speed of the feed roller 9 is set to be higher than the peripheral speed of the platen roller 6, the label continuum 3 is moved by the feed roller 9 to the platen roller 6. Since the feed roller 9 stops rotating when it is about to be transported beyond the transport speed of, the continuous feed label 9 is not transported more than necessary by the feed roller 9 and the occurrence of print elongation can be prevented. There is an effect.

  In the present embodiment, an example of feeding and backfeeding while the belt-like mount 2 is sandwiched between the feed roller 9 and the pinch roller 10 has been described, but a plate-like member that forms a conveyance path instead of the pinch roller 10 And the belt-like mount 2 may be sandwiched between the plate-like member and the feed roller 9.

  In the present embodiment, the first timing belt 15 stretched between a platen pulley 62 and a motor rotation shaft (not shown) as a means for transmitting rotational power, a feed pulley 93 and a platen pulley 62 are provided. Although the second timing belt 16 stretched between them is used, the rotational power may be transmitted using other transmission means such as a gear instead of the timing belt.

Further, in the present embodiment, the torque limiter 92 is used as means for giving a constant amount of torque to the rotation of the feed roller 9 during backfeeding. Instead of the torque limiter 92,
When the feed roller 9 rotates in the feed direction, the feed roller 9 rotates in a free state (a state where no torque is generated). When the feed roller 9 rotates in the back feed direction, a one-way hinge that gives a certain amount of torque is installed. It may be used.

  Note that the present invention is not limited to the above-described embodiments, and it is obvious that the embodiments can be appropriately changed within the scope of the technical idea of the present invention. In addition, the number, position, shape, and the like of the constituent members are not limited to the above-described embodiment, and can be set to a suitable number, position, shape, and the like in practicing the present invention. In each figure, the same numerals are given to the same component.

1 is a schematic configuration diagram showing a configuration of an embodiment of a printing apparatus according to the present invention. It is a figure which shows the structure which drives the platen roller and feed roller which are shown in FIG. It is a perspective view which shows the structure which drives the feed roller shown in FIG. It is sectional drawing which shows the structure which drives the feed roller shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Label 2 Band-shaped mount 3 Label continuous body 4 Label supply axis | shaft 5 Guide roller 6 Platen roller 7 Thermal head (printing means)
8 Peeling Plate 9 Feed Roller 10 Pinch Roller 11 Mount Roller Shaft 12 Right Plate 13 First Left Plate 14 Second Left Plate 15 First Timing Belt 16 Second Timing Belt 61 Platen Shaft 62 Platen Pulley 91 Feed Shaft 92 Torque Limiter (Torque imparting means)
93 Pulley for feed 94 One-way hinge 921 Outer ring 922 Inner ring 941 Outer ring 942 Inner ring

Claims (3)

A platen roller that conveys a continuous label body with a label temporarily attached to the belt-like mount at intervals, a thermal head that holds the label continuous body between the platen roller and prints on the label, and the continuous label A printing apparatus comprising a peeling plate for folding the body and peeling the label after printing from the belt-like mount, and a feed roller for transporting the belt-like backing folded by the peeling plate,
When feeding the label continuum, the platen roller and the feed roller are connected to rotate in the feed direction,
When back feeding the continuous label body, only the platen roller is driven to rotate in the back feed direction, and a certain amount of torque is applied to the rotation of the feed roller accompanying the back feed of the belt-like mount. Printing device. When feeding the label continuum, rotational power is transmitted to the feed roller, and when feeding back the label continuum, a one-way hinge that blocks transmission of rotational power to the feed roller;
2. The printing apparatus according to claim 1, wherein a torque applying means for applying a constant amount of torque to the rotation of the feed roller accompanying the back feed of the belt-like mount is provided around the feed shaft of the feed roller. When the one-way hinge feeds the label continuum, if the label continuum is about to be transported by the feed roller beyond the transport speed of the platen roller, the one-way hinge rotates power from the platen roller to the feed roller. The printing apparatus according to claim 2, wherein the transmission is interrupted.

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