JP2000158736A - Printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a printer in which mounting/demounting of a take-up reel is facilitated while reducing the size of the printer. SOLUTION: An upper unit 5 supported rotatably on a lower unit 6 is provided with a cut sheet carrying section 17 disposed above a take-up reel mounting unit 10. When the upper unit 5 is turned and separated from the lower unit 6, the cut sheet carrying section 17 disposed above the take-up reel mounting unit 10 is turned together and separated from the lower unit 6. Consequently, a full-open state is brought about above the take-up reel mounting unit 10 and a take-up reel 21 fixed thereto can be mounted/demounted easily while reducing the size of a printer 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a POS (Point of Point)
Sales: point-of-sale) Receipts used in terminals /
The present invention relates to a journal printer or the like that can print on both roll paper and cut sheet paper.

[0002]

2. Description of the Related Art In recent years, POS has been widely used for receipt printing and the like.
(Point of Sales: point-of-sale management) For receipt / journal printers mounted on terminals, etc., a separate cut-sheet paper transport unit for transporting cut-sheet paper is provided separately, and a slip such as a receipt after the receipt is issued is printed. Some are made available for issuance.

[0003]

By the way, a cut-sheet paper transport unit separately provided in a receipt / journal printer mounted on a POS terminal or the like takes into consideration the operability of the operator and the prevention of dirt on the cut-sheet paper. In many cases, it is arranged closer to the operator than the print head, and the take-up reel that winds up the roll paper printed for the journal is also positioned closer to the operator than the print head in consideration of the operability of the operator. Often arranged on the side. Therefore, when the cut sheet transport unit is separately provided in the printer, the take-up reel is often arranged closer to the operator than the cut sheet transport unit.

However, when the take-up reel and the cut-sheet paper transport section are arranged in such a manner, the size of the printer and the size of the POS terminal are increased, and the installation area cannot be saved. The problem arises.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a printer capable of reducing the size of an apparatus and facilitating attachment and detachment of a take-up reel.

[0006]

According to the first aspect of the present invention,
A lower unit having an upper unit having a print head for performing a printing operation, a paper storage unit for rotatably supporting the upper unit, storing a roll paper wound thereon, and a platen forming a printing unit together with the print head; A unit, a transport mechanism for delivering and transporting the roll paper stored in the paper storage unit to the printing unit, and the roll paper provided in the lower unit and passing through the printing unit by the transport mechanism by the transport mechanism. A take-up reel mounting unit that detachably mounts a take-up reel that takes up and that transmits a driving force to the take-up reel; and a unit that is provided in the upper unit and is located above the take-up reel mounting unit. And a transport unit for transporting the cut-sheet paper toward the printing unit.

Therefore, when the upper unit is rotated and separated from the lower unit, the cut-sheet paper transporting unit located above the take-up reel mounting unit is also rotated and separated from the lower unit together with the upper unit. This allows
The upper part of the take-up reel mounting unit is fully open. In addition, the size of the printer can be reduced by locating the cut-sheet paper transport unit above the take-up reel mounting unit.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. This embodiment is an example of application to an ink-jet serial printer (hereinafter, referred to as an ink-jet printer) which is a receipt / journal printer mounted on a POS terminal.

FIG. 1 is a sectional view showing the structure of the POS terminal 1. The POS terminal 1 is provided with a keyboard 2, a display 3, and the like in order from the operator side. POS terminal 1
Inside the display 3 and behind the display 3 when viewed from the operator, an ink jet printer 4 which is a receipt / journal printer used for printing receipts, journals, slips, and the like is built in.

FIG. 2 is a longitudinal sectional side view schematically showing the ink jet printer 4 in a closed state, and FIG. 3 is a longitudinal sectional side view schematically showing the ink jet printer 4 in a rotating state. The ink jet printer 4 includes an upper unit 5
And a lower unit 6. The upper unit 5 and the lower unit 6 can be freely opened and closed by a lock mechanism (not shown). The upper unit 5 is rotatably attached to the lower unit 6 by a support shaft 7. The support shaft 7 is provided with a torsion spring S for urging the upper unit 5 relative to the lower unit 6 in the rotation direction.

The lower unit 6 has a platen 8 bent into a mountain shape having a smooth surface, a paper storage unit 9 for storing a roll paper R for a journal and a roll paper (not shown) for a receipt, and a printing unit. A take-up reel mounting unit 10 having a take-up reel 21 for taking up the roll paper R for a journal as a journal is provided. On the other hand, the upper unit 5 is provided with an ink cartridge 11 composed of an ink jet head 11a as a print head and an ink tank 11b, a carrier mechanism 12 for sliding the ink cartridge 11 reciprocally. . The platen 8 provided in the lower unit 6
And ink cartridge 11 provided in upper unit 5
Is provided so that when the upper unit 5 is closed with respect to the lower unit 6, they are opposed to each other. By controlling a driving unit (not shown) for controlling the carrier mechanism 12 and the ink cartridge 11 by a microcomputer (not shown), desired printing can be performed. Therefore, the printing unit 13 is configured by the platen 8, the ink cartridge 11, and the carrier mechanism 12.

Next, the structure near the printing section 13 will be described in detail. A main transport roller 14 that constitutes a part of a transport mechanism is provided between the paper storage unit 9 and the platen 8, and the take-up reel passes through a journal window (not shown) exposed on the surface of the POS terminal 1. A roll paper transport path a (not shown) for the journal which is continuous with the mounting unit 10 and a roll paper transport path (not shown) for the receipt which is continuous with a receipt issuing port (not shown) exposed on the surface of the POS terminal are formed. . Here, the main transport roller 14 is provided upstream of the inkjet head 11a in the paper transport direction to prevent ink from adhering to the main transport roller 14, and
This is to prevent the roll paper R for a journal from being stained with ink. A pinch roller 15 which is opposed to and abuts on the main transport roller 14 when the upper unit 5 is closed is also provided on the upper unit 5 side.

A journal roll paper transport path a
An auxiliary roller pair 16 that constitutes a part of the transport mechanism is provided downstream of the platen 8. The auxiliary roller pair 16 is set so as to convey the journal roll paper R at a higher speed than the main conveyance roller 14. The auxiliary roller 16a of the auxiliary roller pair 16 located on the printing surface side of the journal roll paper R is a star wheel having a number of teeth with sharp tips on the outer peripheral surface. Is provided. That is,
The auxiliary roller pair 16 is established only when the upper unit 5 is closed. Thus, the journal roll paper R is pulled by the auxiliary roller pair 16 and pressed against the platen 8 with a constant force. An auxiliary roller pair (not shown) similar to the auxiliary roller pair 16 is also provided in the receipt printer area, but the description is omitted.

In addition, the ink jet printer 4 has
In order for the receipt or the like after the receipt is issued to be printed on the cut sheet P as a slip, the cut sheet P is
Cut sheet transport path b that is transported in a substantially horizontal direction toward 1a
Are formed on the take-up reel mounting unit 10. The cut sheet transport path b is constituted by a cut sheet transport section 17 having a plurality of transport roller pairs 18 and extends in the horizontal direction. Further, the cut-sheet paper transport unit 17 sends the cut-sheet paper P inserted from the front side in the horizontal direction to the printing unit 13 for printing, and after printing, reverses and moves the cut-sheet paper P to the front side in the horizontal direction. A return drive system (not shown) is provided.

Next, the take-up reel mounting unit 10 will be described. The take-up reel mounting unit 10 has a notch 1
A pair of side plates 20 on which 9 are formed are provided to face each other. The notches 19 of these side plates 20 are provided with take-up reels 21.
The take-up reel 21 is detachably held by rotatably holding both ends of the shaft core 21a. Further, the take-up reel mounting unit 10 includes a drive system (not shown) for transmitting a driving force to the take-up reel 21.

A description will be given of a case in which the take-up reel 21 that has taken up all the roll paper R for a journal printed as a journal is detached from the take-up reel mounting unit 10 in such a configuration. When removing the take-up reel 21 from the take-up reel mounting unit 10, first, the lock mechanism is released. When the lock mechanism is released, the upper unit 5 is rotated in a direction away from the lower unit 6. Here, the upper unit 5 is rotated by the release of the lock mechanism because the upper unit 5 is biased in the rotating direction by the torsion spring S provided on the support shaft 7 connecting the upper unit 5 and the lower unit 6. It is.

In this state, the cut-sheet transporting unit 17 on the take-up reel mounting unit 10 is also rotated together with the upper unit 5, so that the take-up reel mounting unit 10 is fully open. Therefore, the operator must
As shown in (2), the take-up reel 21 can be easily grasped and lifted upward (direction c), so that the take-up reel 21 can be easily attached and detached. Further, by providing the cut-sheet paper transport unit 17 on the take-up reel mounting unit 10, the inkjet printer 4 can be downsized,
The size of the S terminal 1 can be reduced.

In this embodiment, the printer is applied to an ink jet printer, but is not limited to this, and may be applied to a dot impact printer or the like.

[0019]

According to the first aspect of the present invention, when the upper unit is rotated and separated from the lower unit, the cut-sheet paper transport unit located above the take-up reel mounting unit also rotates. The take-up reel mounting unit can be fully opened by moving it to separate it from the lower unit together with the upper unit. The take-up reel can be easily attached and detached. In addition, since the cut-sheet paper transport unit can be located above the take-up reel mounting unit, the printer can be downsized.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a structure of a POS terminal according to an embodiment of the present invention.

FIG. 2 is a vertical sectional side view schematically showing the ink jet printer in a closed state.

FIG. 3 is a vertical sectional side view schematically showing the ink jet printer in a rotating state.

[Description of Signs] 5 Upper unit 9 Paper storage unit 8 Platen 6 Lower unit 10 Take-up reel mounting unit 11a Print head 13 Printing unit 14, 16 Transport mechanism 17 Single-sheet paper transport unit 21 Take-up reel P Single-sheet paper R roll paper

Continuing from the front page (72) Inventor Kazumi Kotani 570 Oni-cho, Oni-cho, Taga-gun, Shizuoka F-term in Tech Onito Office, Ltd. (reference) 2C058 AB12 AC07 AC11 AD01 AE02 AE04 AE09 AF06 AF15 AF31 HA02 HB28 HB33 HB37 2C061 AP10 AQ05 AS02 AS06 BB03 BB12 BB35 CC01 CD07 CD11 CD12

Claims (1)

[Claims] 1. An upper unit having a print head for performing a printing operation, a paper storage unit rotatably supporting the upper unit, and storing a wound roll paper, and a print unit together with the print head. A lower unit having a platen; a transport mechanism for feeding and transporting the roll paper stored in the paper storage unit to the printing unit; and a transport unit provided in the lower unit, wherein the printing unit is transported by the transport mechanism. A take-up reel mounting unit that detachably mounts a take-up reel that winds the passed roll paper and transmits a driving force to the take-up reel; and a take-up reel mounting unit that is provided in the upper unit. And a cut-sheet paper transport unit that is positioned above the printer and transports the cut-sheet paper toward the printing unit.