JP2587471Y2 - Label printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATION This invention is based on laminating an ink ribbon suspended between a feeding section and a take-up section and a long label paper, and using a thermal head to form the ink ribbon. The present invention relates to a label printer that transfers ink to label paper. 2. Description of the Related Art In general, in a label printer, necessary items are printed while continuously feeding using a long label paper, and after the printing, a predetermined size is cut to form a label of a certain size. Have been. Therefore, the cutter device is usually provided in the printer body. However, there are situations where it is required to use only the printer main body without a cutter device in relation to external peripheral devices. In order to respond to this demand, a printer main body that only prints on label paper is formed and the external We are trying to incorporate it into equipment. On the other hand, in order to obtain a normal label, a cutter device is separately provided, and the cutter device is connected to obtain a label sheet cutting function. When printing on label paper, the ink ribbon suspended between the feeding section and the take-up section and the long label paper are laminated, and the ink of the ink ribbon is applied to the label paper by a thermal head. Is transferred to An example of such an apparatus will be described with reference to FIG.
First, the printer main body 1 has a supply unit 3 for holding a label paper 2 wound in a roll shape. From the supply unit 3, the label paper 2 is transferred to a guide 4 by a platen 5 and a thermal head 6. It is guided to the formed printing unit 7. The platen 5 is connected to and driven by a belt 9 to a stepping motor 8 that can rotate forward and backward. On the label paper 2 side, on the side of the thermal head 6, an ink ribbon 12 suspended between a feeding section 10 and a winding section 11 is laminated. On one side of the label issuing side of such a printer body 1,
A cutter device 13 is detachably mounted. The cutter unit 13 is provided with a cutter unit 15 using a rotary cutter 14. A guide 16 for guiding the label paper 2 after printing is provided between the cutter unit 15 and the printing unit 7.
Is provided. Further, on the opposite side of the cutter device 13, there is provided a receiving tray 18 for receiving a label 17 formed to have a predetermined length by being cut by the cutter unit 15. In this way, the necessary information is printed by the printing unit 7 while the label paper 2 is sent, and the cutter unit of the cutter device 13 is printed.
The label 17 is cut at 15 to form the label 17 continuously. Note that the content of printing on the label 17 is provided from an external device (not shown). Problems to be Solved by the Invention There is no problem when label issuance is performed continuously. However, when the printer main body 1 is stopped, when the printer 1 is restarted, the operation from the printing unit 7 to the cutter unit 15 is performed. The label paper 2 passed over is wasted. That is, the label paper 2 in the meantime is discarded as an unnecessary product at the time of the first feeding. In particular, since the cutter device is formed separately from the printer main body, the interval between them is large, and the length of the waste label paper 2 is large. It is also conceivable to reuse the label paper 2 that has been sent out too much by feeding the label paper 2 in the reverse direction. However, the label paper 2 has an ink ribbon 12 laminated thereon and Since the ink ribbon is sandwiched by the thermal head 6, the ink ribbon is loosened or wrinkled, which adversely affects the next printing. Means for solving the problem The ink ribbon and the long label paper suspended between the feeding section and the winding section are provided so as to be freely separated from and separated from each other,
A platen that is driven by a motor to sequentially feed the label paper and a thermal head that sandwiches the ink ribbon and the label paper during printing between the platen and the platen are arranged to face each other. A head separating mechanism is provided to prevent the external force from being applied to the ink ribbon by separating the label paper and to transmit the feeding force from the platen to the label paper. A printer body provided with a backfeed mechanism driven by the motor connected to the platen to feed the label paper in the reverse direction from the cutter device to the thermal head position during backfeeding; To guide the label paper A cutter device provided detachably via a de; the more. When the label paper is fed in the reverse direction by the back feed mechanism, the thermal head moves so that the label paper and the ink ribbon are not sandwiched between the platen and the label paper. Only the paper can be sent in the reverse direction, so that the next print can be performed clearly without the ink ribbon becoming loose or wrinkling. It can be pulled back and its tip can be positioned in the printing section, so that even if the distance between the printer body and the cutter device is large, label paper is not wasted,
All can be used effectively.Especially, even if a back feed mechanism is provided, the motor that is the drive source is shared with the motor that drives the platen, so it can be easily manufactured without increasing the number of parts Can be. Embodiment An embodiment of the present invention will be described with reference to FIGS. The same portions as those described with reference to FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment, a back feed mechanism 19 driven by the platen 5 is provided. That is, a platen pulley 20 is provided at one end of the platen 5, and a timing belt 21 is wound around the platen pulley 20. A back feed platen 22 is provided on the supply side, and the timing belt 21 is attached to a back feed pulley 23 with a one-way clutch attached to one end of the back feed platen 22.
Is wound. A pinch roller 24 is pressed against the back feed platen 22. Next, a solenoid 25 as a head separation mechanism is connected to the thermal head 6. In such a configuration, when the label paper 2 is fed in the forward direction, the back feed platen 22 and the pinch roller 24 are rotated by the label paper 2 sent by the platen 5. Therefore, the back feed mechanism 19 has no function. If printing is interrupted in this state, the leading end of the label paper 2 has reached the cutter section 15 of the cutter device 13. To resume printing in this state, first, the step motor 8 is rotated in the reverse direction to rotate the platen 5 in the reverse direction, and the back feed platen 22 is rotated via the timing belt 21 and the back feed pulley 23. I do. At this time, since the back feed pulley 23 has a one-way clutch, it is driven in the reverse direction to pull back the label paper 2. In this case, at the same time, the solenoid 25 is energized and the thermal head 6 separates from the platen 5, and at this portion, there is no resistance to the movement of the label paper 2 in the reverse direction. Therefore, the next printing can be performed clearly without the ink ribbon 12 becoming loose or wrinkling. When the label paper 2 is pulled back by a certain distance in this way, the leading end is located at the printing unit 7, and the label paper 2 can be effectively used without wasting it at all. Effect of the Invention As described above, this invention laminates the ink ribbon suspended between the feeding section and the winding section and the long label paper whose tip is cut by the cutter device so as to be able to freely contact and separate. A platen that is driven by a motor to sequentially feed the label paper, and a thermal head that sandwiches the ink ribbon and the label paper when printing is performed between the platen and the platen. A head separation mechanism is provided to prevent the external force from being applied to the ink ribbon by separating from the platen and to prevent transmission of the feeding force from the platen to the label paper. Driven by the motor connected to the platen at the time of back feed while rotating with the label paper A back feed mechanism for feeding the label paper in the reverse direction from the cutter device to the thermal head position is provided, so that when the label paper is fed in the reverse direction by the back feed mechanism, the thermal head moves and the platen is moved. Since the label paper and the ink ribbon are not sandwiched between the labels, only the label paper can be sent in the reverse direction without applying any external force to the ink ribbon, whereby the ink ribbon may be loosened or wrinkled. The next printing can be performed sharply without the need for printing, and the label paper protruding from the printing section can be pulled back to position the leading end of the label paper in the printing section. Even if the interval is large, the label paper is not wasted and all can be used effectively. Since the motor serving also as a drive source provided is shared with a motor for driving the platen and has an effect such as can be manufactured easily without increasing the number of parts.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing an embodiment of the present invention, FIG. 2 is a perspective view of a main part, FIG.
The figure is a side view of a part of a state in which the sheet is being sent in the reverse direction, and FIG. 5 is a side view showing an example of the related art. 2 ... label paper, 5 ... platen, 6 ... thermal head,
10 ... Sending part, 11 ... Rewinding part, 12 ... Ink ribbon, 13 ...
Cutter device, 16… guide, 19… back feed mechanism

   ────────────────────────────────────────────────── ─── Continuation of front page       (56) References JP-A-61-158481 (JP, A)                 JP-A-62-234965 (JP, A)                 JP-A-60-99659 (JP, A)                 JP 62-80075 (JP, A)                 JP-A-62-255173 (JP, A)                 60-125151 (JP, U)

Claims (1)

(57) [Rules for requesting registration of utility model] A platen for sequentially feeding the label paper driven by a motor, the platen being provided with an ink ribbon and a long label paper which are suspended between the feeding section and the winding section so as to be capable of coming and going; During printing, a thermal head that sandwiches the ink ribbon and the label paper is disposed to face each other, and the thermal head is separated from the platen at the time of back feed so that no external force is applied to the ink ribbon. A head separating mechanism that prevents transmission of a feeding force from the platen to the label paper; the motor connected to the label paper during printing in the upstream of the label paper in the feeding direction and connected to the platen during back feed; Driven by the label paper from the cutter device to the thermal head position. A printer body provided with a back-feed mechanism for sending direction; label printer according to claim made that more; the label paper cutter device provided detachably via a guide for guiding the to the printer body.