JP2000071533A - Label printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate replacement of roll papers and handling of a jam. SOLUTION: A sensor holder 12 is set opposite to a guide part 11 of a printer main body 1 via a transfer route 10. A sensor 13 is mounted to the sensor holder 12. One end of the sensor holder 12 in a direction orthogonal to a transfer direction of roll papers is rotatably set to the printer main body 1 by a fulcrum part 15. The sensor holder 12 and a holder part 4 to which a printing head is set are coupled by a link member 20, so that the other end of the sensor holder 12 rotates in a direction to be away from the printer main body 1 about the fulcrum part 15 when the holder part 4 is rotated in the direction to be away from the printer main body 1. When the holder part 4 is rotated in the direction to be away from the printer main body 1, the other end of the sensor holder 12 rotates about the fulcrum part 15 in the direction to be away from the printer main body 1, thereby opening large the transfer route 10 between the sensor holder 12 and the guide part 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a label printer which detects a printing reference position with respect to a roll paper which is drawn out of a roll state and conveyed by a sensor, and prints predetermined items by a print head according to the detection result.

[0002]

2. Description of the Related Art Conventionally, in a label printer for printing predetermined items on roll paper, a sensor in which a light emitting element and a light receiving element are opposed to each other in order to detect a printing reference position with respect to roll paper drawn out of a roll state and conveyed. Is provided on the roll paper transport path. This sensor has a roll paper passage portion for passing roll paper between a light emitting element and a light receiving element, the roll paper passage portion is set to a narrow gap size, and the gap size is fixed. .

[0003]

Therefore, when replacing the roll paper, the roll paper must be inserted into the roll paper passage having a narrow gap size, and the work of replacing the roll paper is troublesome. . Further, when the roll paper is jammed, it takes time to clear the jam.

[0004] Therefore, the present invention is to provide a large gap between the guide portion of the conveyance path provided in the printer main body and the sensor holder to which the sensor is attached when replacing the roll paper or performing jam clearance. An object of the present invention is to provide a label printer capable of easily performing paper exchange work and jam processing.

[0005]

According to the first aspect of the present invention,
A sensor in which a holder with a print head is rotatably and freely fixed at an arbitrary position in a direction approaching the printer body and in a direction away from the printer body. In a label printer for detecting a printing reference position on the roll paper and printing predetermined items on the roll paper by the print head based on the detection result of the sensor, the roll paper is provided on a guide portion provided in the printer main body. A sensor holder is provided to face the conveyance path through which the paper is conveyed. The sensor is attached to the sensor holder, and one end of the sensor holder in a direction orthogonal to the roll paper conveyance direction is turned to the printer body by a fulcrum. Movably attached, and when the holder is rotated in a direction away from the printer body, the sensor is The other end of the holder is connected by a link member between the sensor holder and the holder part to rotate in a direction away to the printer main body about said fulcrum.

Therefore, when the holder is rotated upward,
The other end of the sensor holder connected to the holder by a link member pivots upward with the fulcrum as a fulcrum, and the transport path between the sensor holder and the guide is greatly opened. For this reason, the roll paper can be easily replaced by inserting the roll paper between the sensor holder and the guide portion, and the jam can be easily removed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the overall structure of a label printer, which comprises a printer main body 1 and a roll paper holder 2. The printer main body 1 is vertically moved between a lower position close to the printer main body 1 as shown in FIG. 1 with the support shaft 3 as a fulcrum and an upper position separated from the printer main body 1 as shown in FIG. A rotatable holder 4, a platen 5 that is driven to rotate by a drive motor (not shown), and a lock lever 6 for locking the holder 4 at the lower position shown in FIG. 1 are attached. An ink ribbon 7, a thermal head 8 as a print head, and the like are attached to the holder unit 4.

The roll paper holder 2 is provided with a roll paper 9 in which a number of labels attached to a backing paper are wound in a roll shape. After the roll paper 9 is pulled out of the roll state, it is inserted into the printer main body 1, and when the holder section 4 is turned to the lower position shown in FIG. 1, the ink ribbon 7 is moved between the platen 5 and the thermal head 8. Is superimposed.

Further, a roll paper 9 is provided in the printer body 1.
Is formed, and a sensor holder 12 is disposed at a position facing the guide section 11 from above on the entrance side of the transfer path 10. The sensor holder 12 is formed in a long shape, and is disposed so as to extend in a direction orthogonal to the transport direction of the roll paper 9. A light receiving unit 13 as a part of the sensor is attached to the sensor holder 12, and a light emitting unit 14 as a part of the sensor is attached at a position of the guide unit 11 facing the light receiving unit 13.

At one end of the sensor holder 12 is formed a fulcrum 15 which is held with flexibility, and the printer body 1 is formed with an engagement hole 16 with which the fulcrum 15 is engaged. By engaging the fulcrum 15 with the engagement hole 16, the other end of the sensor holder 12 is vertically rotatable about the fulcrum 15 as a fulcrum.

The other end of the sensor holder 12 is integrally formed with a holding shaft 17 projecting in the direction in which the sensor holder 12 extends. The printer main body 1 is integrally formed with a holding plate 19 having a holding groove 18 that opens upward to hold the holding shaft 17.

A link member 20 is attached to the side plate 4a of the holder 4.
Are rotatably connected by a support shaft 21.
A vertically long slot 22 is formed at the lower end of the link member 20, and the holding shaft 17 of the sensor holder 12 is inserted into the slot 22.

In such a configuration, FIGS.
2 shows a state in which the holder unit 4 is turned to the lower position and locked, and FIGS. 2 and 4 show a state in which the locked state is released and the holder unit 4 is turned to the upper position.

As shown in FIGS. 1 and 3, when the holder portion 4 is turned downward and locked, the sensor holder 12 and the guide portion 11 face each other in parallel, and
The light emitting unit 14 and the light receiving unit 13 are closely opposed to each other in the vertical direction, and the roll paper 9 pulled out of the roll state is
4 and the light receiving unit 13. The light-emitting unit 14 and the light-receiving unit 13 detect only the mount between the labels affixed to the mount during the transport by the light-emitting unit 14 and the light-receiving unit 13, and control the printing position on the label based on the detection result. Done.

While the roll paper 9 is being conveyed, FIG.
As shown in (a), since the upper side edge of the elongated hole 22 of the link member 20 is in contact with the upper outer peripheral surface of the holding shaft 17,
The sensor holder 12 is securely fixed in position, and can reliably guide the roll paper 9 to be conveyed. Since the outer roll paper is used in place of the inner roll paper 9 shown in FIG. 1, even when an upward pushing force is applied to the sensor holder 12, the sensor holder 12 is not lifted, and The guide of the roll paper can be surely performed.

As shown in FIGS. 2 and 4, when the holder portion 4 is rotated to the upper position, the link member 20 moves to the upper position with the rotation. Sensor holder 12 engaged with long hole 22
The holding shaft 17 rotates upward about the fulcrum 15. At this time, as shown in FIG.
Is separated from the holding groove 18, and the lower side edge of the elongated hole 22 is in contact with the lower outer peripheral surface of the holding shaft 17.

As shown in FIG. 4, the roll paper 9 between the sensor holder 12 and the guide portion 11 is conveyed by rotating the holding shaft 17 side of the sensor holder 12 around the fulcrum portion 15 upward. The gap between the parts opens greatly. Therefore, when the roll paper 9 is replaced, the work of inserting the roll paper 9 between the guide portion 11 and the sensor holder 12 can be easily performed, and the replacement work of the roll paper 9 can be easily performed in a short time. Further, the sensor holder 12 and the guide portion 11
If the roll paper 9 is jammed in between, the jam processing can be easily performed.

To attach the sensor holder 12 to the printer main body 1, the fulcrum 15 having flexibility is engaged with the engagement hole 16, the holding shaft 17 is inserted into the elongated hole 22, and the holding shaft 17 is held by the holding groove 18. It is done by that. For this reason, as shown in FIG. 6B, the sensor holder 12 can be easily removed from the printer main body 1 by bending the fulcrum 15 and removing it from the engagement hole 16. By removing the sensor holder 12 from the printer main body 1, it is possible to easily perform a removing operation when a label peeled off from the backing is stuck to the sensor holder 12, a cleaning operation of the light receiving unit 13 and the light emitting unit 14, and the like.

In the present embodiment, as an example of the roll paper 9, a number of labels are stuck on a backing paper and wound in a roll shape, but the tag paper is wound in a roll shape. It may be turned.

Further, in the present embodiment, the light receiving section 13 of the transmission type sensor has been described as an example of the sensor attached to the sensor holder 12, but the light emitting section 14 may be attached to the sensor holder 12. Further, a case where a reflection type sensor is attached to the sensor holder 12 may be used.

[0021]

According to the label printer of the first aspect of the present invention, when the holder on which the print head is mounted is rotated in a direction away from the printer main body, one end is turned to the printer main body by the fulcrum. The other end of the movably mounted sensor holder can be rotated in a direction away from the printer main body via the link member. This allows
The roll paper conveyance path between the sensor holder and the guide portion can be made wide open, and the roll paper exchange work and jam clearance performed by inserting the roll paper between the sensor holder and the guide portion can be easily performed. be able to.

[Brief description of the drawings]

FIG. 1 is a side view of a label printer according to an embodiment of the present invention, showing a state in which a holder is turned to a lower position and locked.

FIG. 2 is a side view illustrating the label printer in a state where a holder unit is rotated to an upper position.

FIG. 3 is a front view showing the printer main body in a state where the holder is turned to a lower position and locked.

FIG. 4 is a front view showing the printer main body in a state where the holder is rotated to an upper position.

5A and 5B are side views showing a holding state of a holding shaft of the sensor holder, in which FIG. 5A shows a state in which the holder is turned to a lower position, and FIG. 5B shows a state in which the holder is turned to an upper position. It is the state at the time.

FIG. 6 shows a structure of a fulcrum of a sensor holder.
(A) shows a state when the sensor holder is attached to the printer main body, and (b) shows a state when the sensor holder is removed from the printer main body.

[Description of Signs] 1 Printer main body 4 Holder section 8 Print head 9 Roll paper 10 Transport path 11 Guide section 12 Sensor holder 13 Sensor 15 Support point section 20 Link member

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshifumi Sakamoto 570, Ohito, Oni-cho, Tagata-gun, Shizuoka Prefecture Inside the Tech Ohi Plant (72) Inventor, Teruyuki Ochiai 570, Oni-cho, Oni-cho, Tata-gun, Shizuoka Co., Ltd. F-term in TEC Ohito Office (reference) 2C058 AB06 AB12 AC06 AD06 AE04 AE14 AE16 AF36 GB04 GB05 GB14 GB47 GH02 GH06

Claims (1)

[Claims] 1. A printer according to claim 1, further comprising a holder mounted with the print head rotatably and freely fixed at an arbitrary position in a direction approaching to and away from the printer body, and facing a roll paper drawn out of the roll state and conveyed. A label printer that detects a printing reference position with respect to the roll paper by a sensor that is arranged and prints predetermined items on the roll paper by the print head based on a detection result of the sensor; and a guide provided on the printer body. A sensor holder is provided at a portion of the sensor holder that faces the conveyance path through which the roll paper is conveyed, and the sensor is attached to the sensor holder. The holder is rotatably attached to the printer main body, and the holder is rotated in a direction away from the printer main body. A label connecting the sensor holder and the holder with a link member such that the other end of the sensor holder rotates around the fulcrum in a direction away from the printer body. Printer.