JP6262061B2 - Printer - Google Patents

Description

  The present invention relates to a printer that performs printing on a strip-like non-mounting label paper having an adhesive layer on the back surface, and more particularly to a printer that back feeds a required amount of label paper.

  Conventionally, as this type of printer, for example, a printer described in Patent Document 1 (Japanese Patent Laid-Open No. 2013-248816) is known. As shown in FIG. 8, this printer Sa performs printing on the front surface of a strip-like non-mounting label paper L having an adhesive layer on the back surface, and the label paper L fed out from a reel (not shown) In order to hold the label paper L between the platen roller 100 supported from the platen and the print head 101 facing the platen roller 100 and perform printing at a predetermined position of the label paper, first, the platen roller 100 is reversely rotated (Rb direction). Then, the label paper L is back-feeded by a required amount for positioning, and then the platen roller 100 is rotated in the forward direction (Ra direction) to convey the label paper L, and printing is performed by the print head 101 during the conveyance process. The label is issued after being cut at 102. When the next label is issued, the platen roller 100 is reversely rotated and back feed is performed again, and then the label paper L is conveyed by the normal rotation of the platen roller 100 and printed by the print head 101. In this way, labels are issued sequentially and continuously.

  In this conventional printer Sa, a pair of auxiliary rollers 103 and 103 are provided upstream of the platen roller 100 to hold the label paper L and assist the back feed of the label paper L by the reverse rotation of the platen roller 100. Each auxiliary roller 103 is connected to a rotating shaft 104 via a one-way clutch (not shown). When the platen roller 100 reversely feeds back the label paper L, the belt transmission mechanism 105 that is clutch-connected to the rotation shaft 104 and is driven in synchronization with the platen roller 100 can be rotated in synchronization. Yes. Thereby, when the label paper L is back-fed, the auxiliary roller 103 is also rotationally driven together with the platen roller 100 to forcibly pull the label paper L in the upstream direction, so that stable back-feed can be performed. I have to. The required length by which the label paper L moves backward when back-feeding is absorbed by bending to the upstream side of the auxiliary roller 103.

JP2013-248816A

In the conventional printer Sa, when the label paper L is fed back, the auxiliary roller 103 is driven synchronously with the platen roller 100 to forcibly pull the label paper L in the upstream direction. Although stable back feed is performed, since a drive mechanism such as the belt transmission mechanism 105 is provided, there is a problem that the mechanism becomes complicated and the size of the mechanism increases.
On the other hand, in order to solve this problem, for example, as shown in FIG. 9A, a support roller 110 for the rotatable label paper L is provided on the upstream side of the platen roller 100. It is also conceivable to simplify the mechanism by supporting the sheet paper on the support roller 110 and deflecting and absorbing the required length of the label paper L that moves backward when the back feed is performed. It is done.

  However, as shown in FIG. 9B, due to the installation angle of the print head 101 with respect to the platen roller 100, the label paper L may swell upward during backfeeding. There is a problem that the label paper L is caught or creased, and the posture of the label paper L becomes unstable, and the label paper L is caught when the next platen roller is rotated forward. There is a problem that there is a problem such as occurrence. In this case, adjustment to reset the label paper L manually becomes necessary, which is complicated.

  The present invention has been made in view of the above-mentioned problems, the label paper is retracted so as not to bulge upward at the time of backfeed, and the required length to be retracted is bent in a constant posture on the upstream side, It is an object of the present invention to provide a printer that simplifies the mechanism while stabilizing the posture of the label sheet and suppressing its catching.

In order to solve the above problems, a printer according to the present invention is a printer that performs printing on the surface of a strip-like non-mounting label paper having an adhesive layer on the back side, and supports the label paper from the back side. And the print head facing the platen roller, the label paper is sandwiched, the label paper is conveyed by the normal rotation of the platen roller, and printing is performed by the print head during the conveyance process, and the reverse of the platen roller In the printer that feeds back the label paper,
Provided on the upstream side of the platen roller is a support roller that is rotatable about an axis parallel to the axis of the platen roller and that can support the label paper from the back side thereof. Provided so as to be positioned lower than the transport path of the label paper that is transported under tension when the platen roller is rotated forward, and is rotatable around an axis parallel to the axis of the platen roller in the vicinity of the support roller In addition, a pressing roller is provided that rolls on the surface side of the label sheet when the platen roller is rotated forward to apply tension to the label sheet.

As a result, when the platen roller reverses to feed the label paper back, the label paper moves backward, and the apex of the support roller is positioned lower than the transport path of the label paper. The label paper slides on the support roller, or the support roller is free to rotate, so the support roller rotates due to frictional resistance with the label paper, and the required length for the label paper to retract when back fed The portion is absorbed by being bent downward in a U shape upstream of the support roller.
In this case, even if the label sheet swells upward and bends, since the press roller is provided in the vicinity of the support roller, the label sheet comes into contact with the press roller and the upward movement of the label sheet is restricted, Therefore, the situation where it swells and is caught or a crease is attached is prevented. In other words, the required length of the label paper to be retracted by the back feed can be drawn into the intended place, and the back feed of the label paper without the mount can be stably performed.

Thereafter, when the platen roller rotates normally, the label paper is conveyed by the platen roller. In this case, since the apex of the support roller is positioned lower than the transport path of the label paper, the label paper is separated from the support roller because the label paper is pulled upward. Further, since the label sheet separated from the support roller comes into contact with the pressing roller, tension is generated, and the label sheet is conveyed along the conveyance path, and required printing is performed by the print head. Therefore, when the label paper is transported, the support roller does not stick to the label paper and becomes a resistance, and the label paper can be transported smoothly. In this case, since the required length retracted by the back feed bends in a constant posture on the upstream side, the posture of the label paper is stable, so that it can be prevented from being caught elsewhere, for example, a jam can be caused by the platen roller. The occurrence of such a situation is prevented.
In other words, since the structure is simple with a rotatable support roller and a pressure roller, the mechanism can be simplified, and the required length to be retracted by back feed without using a drive device as in the prior art. It is possible to stabilize the posture of the label paper and suppress the catch thereof by making the portion bend in a constant posture on the upstream side.

If necessary, the shortest distance Y between the outer peripheral surface of the support roller and the outer peripheral surface of the pressing roller is set to 0.8 mm ≦ Y ≦ 1.5 mm.
Within this range, the above action can be performed smoothly and reliably.

If necessary, if the diameter of the platen roller is D1, the diameter of the support roller is D2, and the diameter of the pressing roller is D3, D2 <(1/2) D1, D3 <(1/2) D1 It is made the structure which was made.
As a result, the support roller and the presser roller are significantly smaller than the platen roller, so that the apparatus can be downsized accordingly.

  In addition, if necessary, the support roller includes a plurality of grooves formed along the circumferential direction at predetermined intervals in the axial direction. Since the so-called grooved roller is used, the area of contact with the back surface of the label paper is reduced, so that the label paper can be moved and peeled off smoothly from the support roller.

  Furthermore, if necessary, the pressing roller includes a plurality of grooves formed along the circumferential direction at predetermined intervals in the axial direction. Since the so-called grooved roller is used, the area of contact with the surface of the label paper is reduced, so that the label paper can be moved smoothly.

  According to the present invention, since a simple structure including a rotatable support roller and a pressing roller is provided, the mechanism can be simplified, and even if the mechanism is simplified in this way, label paper can be used at the time of back feed. The sheet is retracted so that it does not bulge upward, and the required length to be bent is bent in a constant posture, so that the posture of the label sheet can be stabilized and the catch can be suppressed.

FIG. 2 is a main part diagram illustrating a configuration of a printer according to an embodiment of the present invention. 1 is a perspective view of a main part showing a configuration of a printer according to an embodiment of the present invention. FIG. 2 is an enlarged view of a main part showing the configuration of the printer according to the embodiment of the present invention. It is a figure which shows the effect | action of the printer which concerns on embodiment of this invention. It is a figure which shows another effect | action (at the time of back feed) of the printer which concerns on embodiment of this invention. It is a figure which shows another effect | action (at the time of back feed) of the printer which concerns on embodiment of this invention. It is a figure which shows another effect | action (at the time of conveyance) of the printer which concerns on embodiment of this invention. It is a principal part figure which shows an example of the conventional printer. It is a figure which shows the fault of the punter proposed in the development process of this invention.

  Hereinafter, a printer according to an embodiment of the present invention will be described with reference to the accompanying drawings. As shown in FIGS. 1 to 7, the printer S according to the embodiment of the present invention prints on the surface of a strip-like non-mounting label paper L having an adhesive layer on the back surface. This non-mounting label paper L is said to be a linerless label, Non-Sepa (registered trademark), etc., and is formed by arranging a plurality of labels La with a perforation as a boundary. The strip-shaped label paper L is generally distributed in the form of a label roll (not shown) wound in a roll shape.

  The printer S includes a machine base 1. The machine base 1 is provided with a reel (not shown) on which a label roll is mounted and the label paper L is fed out. Further, the machine base 1 is provided with a platen roller 2 that supports the label paper L fed from the reel from the back side thereof, and a print head 3 facing the platen roller 2, and the platen roller 2 and the print head 3. In order to pinch the label paper L and perform printing at a predetermined position on the label paper L, first, the platen roller 2 is rotated in the reverse direction (Rb direction) to position the label paper L back-feed the required amount, and then the platen The roller 2 is rotated in the forward direction (Ra direction) to convey the label paper L, and printing is performed by the print head 3 during the conveyance process, and then the label is perforated by a cutter (not shown) on the downstream side of the platen roller 2. Cut the label and issue a label. It should be noted that it may be cut manually without providing a cutter.

  The platen roller 2 is attached to a fixing member 4 provided on the machine base 1. The print head 3 is attached to a movable member 5 (FIG. 2) provided so as to be openable and closable with respect to the fixed member 4. The print head 3 is pressed against the platen roller 2 when closed and can be separated from the platen roller 2 in the disclosure. . 1 and 4 to 7, reference numeral 6 denotes a sensor that detects a mark such as a perforation on the conveyed label paper L. The platen roller 2 is rotated forward, stopped, and reversely based on the detection of the sensor 6 to transfer and position the label paper L. Reference numeral 7 denotes a guide plate that is provided on the downstream side of the sensor 6 and guides the label sheet L in contact with the surface.

  On the upstream side of the platen roller 2, the fixing member 4 is provided with a support roller 10 that can rotate around an axis parallel to the axis of the platen roller 2 and can support the label paper L from the back side. As shown in FIG. 2, the support roller 10 is a so-called grooved roller provided with a plurality of grooves 11 formed along the circumferential direction at predetermined intervals in the axial direction. As shown in FIG. 3, the support roller 10 is provided such that its apex 10a is positioned lower than the conveyance path K of the label paper L that is conveyed with tension applied when the platen roller 2 is rotated forward. ing.

  In addition, between the platen roller 2 and the support roller 10, the fixed member 4 has a fixed (non-rotating) rod that has an axis parallel to the axis of the platen roller 2 and can adhere to the back surface of the label paper L. 12 is provided. The rod 12 is made of, for example, a metal such as stainless steel, and the surface thereof is configured by a flat surface or a curved surface to which the back surface of the label paper L can be adhered. In the embodiment, the rod is a cylindrical bar having a circular cross section, and the surface is a curved surface. The rod 12 forms a required interval with the platen roller 2 and, as shown in FIG. 3, the apex 12a of the rod 12 is conveyed with tension applied during the forward rotation of the platen roller 2. It is provided so as to be lower than the conveyance path K of the label paper L and to be positioned lower than the apex 10a of the support roller 10 by the dimension e.

  Specifically, as shown in FIG. 3, the shortest distance X1 between the outer peripheral surface of the platen roller 2 and the outer peripheral surface of the rod 12 is set to 3.0 mm ≦ X1 ≦ 5.5 mm, and the outer peripheral surface of the rod 12 and the support are supported. The shortest distance X2 from the outer peripheral surface of the roller 10 is set to 0.5 mm ≦ X2 ≦ 3.0 mm. In the embodiment, X1 = 4.0 mm and X2 = 1.0 mm are set.

Further, when the diameter of the platen roller 2 is D1, the diameter of the support roller 10 is D2, and the maximum diameter of the rod 12 is Da, Da ≦ D2 <(1/2) D1. In the embodiment, Da <D2, and the axis of the support roller 10 and the axis of the rod 12 are arranged on a horizontal line substantially parallel to the transport path K. Thereby, since the vertex 12a of the rod 12 can be positioned lower than the vertex 10a of the support roller 10, the arrangement of the support roller 10 and the rod 12 can be facilitated. In the embodiment, D1 = φ16.3 mm, D2 = φ5.0 mm, and Da = φ3.0 mm.
Thereby, since the support roller 10 and the rod 12 become significantly smaller than the platen roller 2, the apparatus can be reduced in size accordingly.

  Further, in the vicinity of the upstream side of the support roller 10, the movable member 5 is rotatable about an axis parallel to the axis of the platen roller 2, and the surface side of the label paper L is rotated when the platen roller 2 is rotated forward. A presser roller 20 that rolls and applies tension to the label paper L is provided. As shown in FIG. 2, the presser roller 20 is a so-called grooved roller provided with a plurality of grooves 21 formed along the circumferential direction at predetermined intervals in the axial direction.

Further, as shown in FIG. 3, the shortest distance Y between the outer peripheral surface of the support roller 10 and the outer peripheral surface of the pressing roller 20 is set to 0.8 mm ≦ Y ≦ 1.5 mm. In the embodiment, Y is set to 1.0 mm.
Furthermore, when the diameter of the pressing roller 20 is D3, D3 <(1/2) D1. In the embodiment, D2 = D3, and therefore, D3 = φ5.0 mm.
As a result, the press roller 20 as well as the support roller 10 is significantly smaller than the platen roller 2, and the apparatus can be downsized accordingly.

Therefore, when printing on the label paper L by the printer S according to the embodiment, the following is performed.
First, as shown in FIG. 4, when the platen roller 2 is reversely rotated and the label paper L is positioned by backfeeding the required amount, the label paper L usually moves backward, and the vertex 10a of the support roller 10 is the label 10a. Since the label paper L is supported by the support roller 10 because it is positioned below the transport path K of the paper L, the label paper L slides on the support roller 10 or the support roller 10 is rotatable. The supporting roller 10 is rotated by the frictional resistance with the label sheet L, and the required length of the label sheet L to be retracted when back-feeding is bent downward in a U shape upstream from the supporting roller 10. Absorbed. In this case, since the support roller 10 is a so-called grooved roller, the contact area with the back surface of the label paper L is reduced, so that the label paper L can be smoothly moved with respect to the support roller 10.

  In this case, even if the label paper L swells upward and bends, since the press roller 20 is provided in the vicinity of the support roller 10, the label paper L comes into contact with the press roller 20 and the upper side of the label paper L. Therefore, it is possible to prevent a situation such as a bulge and a hook or a crease. That is, the required length of the label paper L to be retracted by the back feed can be drawn into the intended location, and the back feed of the label paper L without the mount can be stably performed.

  Then, as shown in FIG. 1, the platen roller 2 is rotated forward to transport the label paper L, and printing is performed by the print head 3 in the transport process to issue a label La. In this case, since the apex 10a of the support roller 10 is positioned below the transport path K of the label paper L, the label paper L is pulled upward, so that the label paper L is separated from the support roller 10. Further, since the support roller 10 is a so-called grooved roller, the contact area with the back surface of the label paper L is reduced, so that the label paper L is smoothly peeled off from the support roller 10.

  As shown in FIGS. 1 and 3, the label paper L that is separated from the support roller 10 abuts against the presser roller 20, so that tension is generated and conveyed along the conveyance path K. Printing is performed. In this case, since the pressing roller 20 is a so-called grooved roller, the contact area with the surface of the label paper L is reduced, so that the label paper L can be moved smoothly. Further, when the label paper L is transported, the label paper L is separated from the support roller 10, so that the support roller 10 does not stick to the label paper L and becomes a resistance, and the label paper L is transported as much. It can be performed smoothly. Further, in this case, since the required length retracted by the back feed bends in a constant posture on the upstream side, the posture of the label paper L is stable, so that it is prevented from being caught elsewhere, for example, a platen roller 2 prevents jamming. The issued label La is cut out by a provided cutter or manually.

  By the way, as described above, it hardly occurs when labels are continuously issued, but when the printer S is stopped and the time exceeds, for example, one day and night, the print head for the platen roller 2 is printed. 3, the label paper L comes into contact with the platen and hardly peels off, and at the time of start-up, it often occurs that the label paper L remains stuck to the platen roller 2 even if back feed is performed. As shown in FIG. 2, when the platen roller 2 is reversely rotated to back-feed the label paper L, the label paper L remains stuck to the platen roller 2, so that the contact portion A of the label paper L becomes the platen roller. 2 and move around the platen roller 2. However, since there is a fixed rod 12 between the platen roller 2 and the support roller 10, the label paper L sticks to the rod 12, and the platen roller 2 reverses to make the label paper L U-shaped. Even if it is bent to enter between the platen roller 2 and the rod 12, the label paper L receives an upward reaction force F from the rod 12, so that it contacts the platen roller 2 as shown in FIG. A situation where the contact portion A of the label paper L is peeled off and pulled down is prevented. In this case, since the surface of the rod 12 is composed of a curved surface that can be adhered, the adhesion of the label paper L to the rod 12 can be reliably performed.

  As shown in FIG. 7, when the platen roller 2 rotates forward from this state, the label paper L is conveyed by the platen roller 2. In this case, since tension is generated in the label paper L, and the apex 10a of the rod 12 is positioned below the conveyance path K of the label paper L, the label paper L is pulled upward, so the label paper L Is peeled off from the rod 12. Then, as shown in FIG. 1, the paper is transported along the transport path K, and a required printing is performed by the print head 3. Further, since the label paper L is peeled off from the platen roller 2 by the rod 12, a situation where the leading edge of the label paper L is caught in the platen roller 2 is also prevented.

  As described above, the printer S has a simple structure including the rotatable support roller 10, the fixed rod 12, and the rotatable presser roller 20. Therefore, the mechanism can be simplified and the conventional configuration can be achieved. Even if a drive device is not used, the required length that is retracted by the back feed can be bent in a constant posture on the upstream side, the posture of the label paper L can be stabilized, and the catch can be suppressed. Further, when the label paper L comes into contact with the platen roller 2 after a long time, the label paper L can be peeled off at the time of back feed, and the label paper L is prevented from coming into contact with the platen roller 2 and being wound. It can be done.

In the above embodiment, the rod 12 is formed in a cylindrical shape. However, the shape is not necessarily limited to this, and the rod 12 may be formed in any shape such as a polygonal cross section. There is no problem. The material may be changed as appropriate, such as using plastic as well as metal. Further, it goes without saying that the shape of the support roller 10 and the presser roller 20 is not limited to a so-called grooved roller.
In the above embodiment, the presser roller 20 is provided in the vicinity of the upstream side of the support roller 10. However, the present invention is not necessarily limited thereto, and is provided directly above the support roller 10 or in the vicinity of the upstream side. It may be changed as appropriate.

S printer L label paper La label 1 machine base 2 platen roller 3 print head 4 fixed member 5 movable member 6 sensor 7 guide plate 10 support roller 10a vertex 12 rod 12a vertex 20 presser roller

Claims (5)

A printer that prints on the surface of a strip-like non-mounting label sheet having an adhesive layer on the back side, the label comprising a platen roller that supports the label sheet from the back side and a print head that faces the platen roller In a printer that sandwiches a sheet, conveys the label sheet by forward rotation of the platen roller, performs printing by the print head in the conveyance process, and back-feeds the label sheet by reverse rotation of the platen roller.
Provided on the upstream side of the platen roller is a support roller that is rotatable about an axis parallel to the axis of the platen roller and that can support the label paper from the back side thereof. Provided so as to be positioned lower than the transport path of the label paper that is transported under tension when the platen roller is rotated forward, and is rotatable around an axis parallel to the axis of the platen roller in the vicinity of the support roller And a press roller that rolls on the surface side of the label sheet to apply tension to the label sheet when the platen roller is rotated forward.   2. The printer according to claim 1, wherein the shortest distance Y between the outer peripheral surface of the support roller and the outer peripheral surface of the pressing roller is set to 0.8 mm ≦ Y ≦ 1.5 mm.   When the diameter of the platen roller is D1, the diameter of the support roller is D2, and the diameter of the pressing roller is D3, D2 <(1/2) D1, D3 <(1/2) D1 The printer according to claim 1 or 2.   The printer according to any one of claims 1 to 3, wherein the support roller includes a plurality of grooves formed along the circumferential direction at predetermined intervals in the axial direction.   5. The printer according to claim 4, wherein the presser roller is provided with a plurality of grooves formed along the circumferential direction at predetermined intervals in the axial direction.

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