JPH08267850A - Recording paper cutting mechanism - Google Patents

Abstract

PURPOSE: To reduce transfer jamming of recording paper and to materialize shortening of a continuous recording transfer time and downsizing of a paper cutting mechanism. CONSTITUTION: A mechanism comprises roll-shaped recording paper 1, a rectangular or plate-shaped thermal head 3 which is installed on the discharge side of the recording paper 1 and the longitudinal direction of which is positioned vertically to the transfer direction of the recording paper 1, a fixed blade 3A placed at one longitudinal end of a ceramic substrate which forms the heater line 11 for printing of the thermal head 3, a rotary blade 8 which rotates and moves contacting the tip which is formed on the fixed blade 3A, and a frame 7 which is installed in parallel with the fixed blade 3A and makes a transfer route. The recording paper is pressed on the heater line 11 of the thermal head 3 fixed on the frame 7 to be contacted closely with a platen roller 5 which conducts transportation by rotation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile, a printer or the like in which a roll of recording paper is used, and more particularly to a device having a cutting mechanism.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional roll-shaped recording paper cutting mechanism in which the recording paper is rewound and positioned near a printing heater line.

The cutting mechanism section, as shown in the schematic view of FIG.
The roll-shaped recording paper 1 is rotatably held, and the line thermal head 9 records the recording paper 2 on the heater line 11 that records on the recording paper 2 fed from the roll-shaped recording paper 1.
The color-developing surface side is opposed to and conveyed.

At this time, the recording paper 2 is conveyed by the rotation of the platen roller 5 after printing and recording while the line thermal head 9 pressed by the tension spring 15 is kept pressed.

Further, after printing and recording, the recording paper 2 is conveyed onto the fixed blade 6 of the recording paper cutting mechanism portion, and the rotary blade 8 which is one component of the recording paper cutting mechanism portion comes into contact with the blade edge of the fixed blade 6. While being rotated, it is cut.

Such a roll-shaped recording paper cutting mechanism is disclosed, for example, in JP-A-59-133085 and JP-A-62-95.
No. 280, JP-A-5-169740 and the like.

[0007]

However, in such a conventional recording paper cutting mechanism, the recording paper 2 is cut through the space between the platen roller 5 and the line thermal head 9 as shown in the schematic view of FIG. The recording paper 2 is conveyed on the fixed blade 6 constituting the unit, but is conveyed by the strength of the waist of the recording paper 2 itself which is conveyed by the platen roller 5.

As a result, if the distance between the platen roller 5 and the recording paper cutting point is long, the recording paper 2 bends, becomes rounded,
Alternatively, there is a problem that the risk of jamming increases due to the contact resistance with the paper guide 16.

Further, it takes a long time to rewind the recording paper 2 onto the printing heater line after cutting the recording paper 2, resulting in a long continuous recording time.

In order to prevent such an inconvenience from occurring, the platen roller 5 and the recording paper cutting point may be provided close to each other, but in reality, the drive space of the recording paper cutting portion is maintained. There was a problem that it had to be done and it was difficult to bring them closer.

The present invention has been made in view of the above-mentioned conventional circumstances. Therefore, the object of the present invention is to eliminate the above-mentioned drawbacks inherent in the conventional technique, reduce the jamming of the recording paper, and continuously record. Another object of the present invention is to provide a novel recording paper cutting mechanism that can shorten the transportation time and downsize the device.

[0012]

In order to achieve the above object, a recording paper cutting mechanism according to the present invention comprises a roll-shaped recording paper and a roll-shaped recording paper disposed on the discharge side of the roll-shaped recording paper. A rectangular or plate-shaped thermal head arranged in a direction perpendicular to the recording paper conveyance direction, a fixed blade formed at one longitudinal end of a ceramic substrate forming a heater line for printing of this thermal head, A rotary blade that rotates while contacting the blade edge formed on the fixed blade,
A frame disposed in parallel with the fixed blade and forming a moving path, and the recording paper is pressure-bonded onto the heater line of the thermal head fixed to the frame, and a platen roller for transporting by rotation is pressure-contacted. It is characterized by taking the structure.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the accompanying drawings with reference to the accompanying drawings.

FIG. 1 is a schematic perspective view showing an embodiment of the present invention with an exterior cover opened, and FIG. 2 is a schematic sectional view taken along the line AA 'of FIG. 1 and seen in the direction of the arrow. Is.

Referring to FIG. 1 or 2, the recording paper cutting section has a fixed blade 3A at one longitudinal end of the ceramic substrate thermal head 3 forming a heater line 11 for printing of the thermal head, a rotary blade 8, and The recording paper 2 is composed of a fixed blade 3A which also serves as a heat dissipation plate of the thermal head and a frame (paper guide) 7 which is arranged in parallel and forms a moving path.
A heater line 11 is attached to the passage side of the recording paper 2 so as to face the color development surface of the recording paper 2.

The roll-shaped recording paper 1 is rotatably held, and the recording paper 2 fed from the roll-shaped recording paper 1 is
After printing after passing through the heater line 11, the recording paper is cut to a desired size at the recording paper cutting point of the rotary blade 8 which constitutes the recording paper cutting unit.

Further, the heater line 11 of the thermal head
A platen roller 5 fixed to an outer cover 4 which is arranged above and can be opened and closed is arranged. The platen roller 5 is configured to be capable of either normal rotation or reverse rotation by driving a motor or gear (not shown). When the side bracket 14 and the exterior cover 4 are closed, the recording paper 2 is sandwiched between the heater line 11 portion of the ceramic substrate 3 and the platen roller 5, and the platen roller 5 is rotated to rotate the platen roller 5 to a desired position near the heater line 11. Set to position.

When printing on the recording paper 2, or 1 in FIG.
The tension (load) for sandwiching the recording paper 2 required to draw the recording paper 2 at the position 2 to the vicinity of the print heater line 11 is, for example, the tension spring 15 or the leaf spring shown in FIG. The recording paper 2 is transported by rotating the platen roller 5 from the side of the frame 7 to which is fixed, or in a state where tension is applied by applying the shaft of the platen roller 5 with a necessary weight.

The distance from the heater line 11 to the recording paper cutting point is about 40 mm in the conventional general apparatus, but is 15 mm when the recording paper cutting mechanism of the present invention is used.
The distance can be shortened to a certain degree.

[0020]

As described above, according to the present invention, the roll-shaped recording paper and the roll-shaped recording paper are arranged on the discharge side and the longitudinal direction is arranged parallel to the leading end surface of the roll-shaped recording paper. Recording paper cutting mechanism including a fixed blade configured at one end of a rectangular or plate-shaped thermal head and a rotary blade that cuts the roll-shaped recording paper by rotating while moving in contact with the tip of the fixed blade In the above, the thermal head for printing on the roll-shaped recording paper is a ceramic substrate integrally formed on the running surface side of the roll-shaped recording paper, and the thermal head is composed of a radiating plate and a reinforcing plate for the fixed blade of the cutting mechanism. The recording paper cutting mechanism has a structure that includes a platen roller that presses the roll-shaped recording paper onto the heater line of this thermal head and conveys it by rotation, so it is possible to reach the cutting position after printing. Distance slack of the recording sheet to become shorter, to become resistant to Mari Maru, it is possible to reduce the transport jamming of the recording paper sheet guide is due to contact resistance for unnecessary.

Further, since the distance between the platen roller and the recording paper cutting point is shortened, the recording paper transportation distance is shortened, and the recording paper transportation time during continuous recording can be shortened.

Also, one end of the ceramic substrate of the thermal head can be used as a fixed blade and the frame forming the transfer path can be used as a heat radiating plate, so that the conventional heat radiating plate can be eliminated, and the number of parts and the cost can be reduced.

Further, by adopting the configuration of the present invention, it becomes possible to configure a recording paper cutting mechanism which is smaller than the conventional one, and it is possible to further reduce the size of the apparatus and reduce the cost of parts. can get.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of the present invention with an exterior cover opened.

FIG. 2 is a schematic cross-sectional view taken along line AA ′ of FIG. 1 and viewed in the direction of the arrow.

FIG. 3 is a schematic sectional view showing an example of a conventional technique.

[Explanation of symbols]

 1 ... Roll recording paper 2, 12, 13 ... Recording paper 3 ... Ceramic substrate thermal head 3A ... Fixed blade 4, 10 ... Exterior cover 5 ... Platen roller 6 ... Fixed blade 7 ... Frame (paper guide) 8 ... Rotating blade 9 … Line thermal head 11… Heater line 14… Side bracket 15… Tension spring 16… Paper guide

Claims (5)

[Claims] 1. A roll-shaped recording sheet, and a rectangular or plate-shaped thermal sheet arranged on a discharge side of the roll-shaped recording sheet and having a longitudinal direction arranged substantially perpendicular to a conveying direction of the roll-shaped recording sheet. A head, a fixed blade provided at one longitudinal end of the thermal head for forming a heater line for printing of the thermal head, a rotary blade that rotationally moves while contacting a cutting edge formed on the fixed blade, and the fixed A frame disposed in parallel with the blade and forming a moving path, and provided with a platen roller for transporting the recording paper by pressure-bonding the recording paper onto the heater line of the thermal head fixed to the frame. A recording paper cutting mechanism having the above structure. 2. The recording paper cutting mechanism according to claim 1, wherein the thermal head is formed of a ceramic substrate. 3. The recording paper cutting mechanism according to claim 1, wherein the frame also serves as a heat dissipation plate. 4. The recording paper cutting mechanism according to claim 1, further comprising an integrated structure of the thermal head and the fixed blade. 5. A recording paper cutting mechanism, wherein the distance between the platen roller and the recording paper cutting point is extremely small.