JPH04325273A - Thermal printer - Google Patents

Abstract

PURPOSE:To facilitate the insertion work of roll paper in a cutter and the removing work of the roll paper jammed into the cutter by a method wherein a thermal head and a platen are allowed to be spaced apart from each other by one operation at the same time when the upper and lower blades of the cutter are allowed to be spaced apart from each other. CONSTITUTION:When the opening and closing operation part 14b1 formed to a cutter opening and closing member 14b is subjected to revolving operation, the leading end part of a blade 14a is moved to the position spaced apart from the position adjacent to roll paper 16 by a predetermined distance and, at the same time, a cooperation part 14b2 is revolved and a head mounting member 13b is revolved along with the part 13b1 to be cooperated coming into contact with the cooperation part 14b2 and, as a result, a thermal head 13 is allowed to be spaced apart from a platen 12.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal printer equipped with a cutter for cutting roll paper.

0002

2. Description of the Related Art An example of a conventional thermal printer will be described with reference to FIGS. 2 and 3. This thermal printer 1 is used as a receipt/journal printer for electronic cash registers, etc., and as shown in FIG. An upper blade 4a and a lower blade 4b are provided near the roll paper discharge side of the pressure contact portion between the head portion 3 and the platen 2.
A cutter 4 consisting of the like is disposed, and a paper guide 5 is further disposed near the roll paper insertion side of the platen 2.

However, as shown in FIG. 3, the print head section 3 has a thermal head 3 attached to a head opening/closing frame 3a in which an L-shaped cam receiving section 3a1 that projects laterally is formed.
b is attached.

On the other hand, the rotating shaft 2a of the platen 2 has a
A head opening/closing lever 6 having a cam portion 6a is rotatably attached by an E ring (not shown).

[0005] In such a thermal printer 1,
When setting the roll paper 7 or removing the roll paper when a jam occurs, move the head opening/closing lever 6 to A.
Rotate in the direction. At this time, the cam receiving part 3a1 is pressed upward by the cam part 6a, and as a result, the print head part 3 moves upward.

[0006]

[Problems to be Solved by the Invention] In such a thermal printer, the cutter 4 is fixedly disposed, and the distance between the tip of the upper blade 4a and the tip of the lower blade 4b is set in the cutting standby state. are always set at a constant narrow interval.

For this reason, even if the head opening/closing lever 6 is rotated in the direction A to move the thermal head 3b away from the platen 2 as described above, the roll paper 7 is not moved to the cutter 4 when the roll paper 7 is set. There is a problem in that it is difficult to insert the roll paper 7 and to remove the roll paper 7 that is jammed in the cutter 4 when a jam occurs.

[0008]

[Means for Solving the Problems] A thermal head is provided so as to be rotatable in the direction of contact with and away from the platen, and is biased in the direction of pressure contact with the platen, and a thermal head is provided on the roll paper discharge side with respect to the thermal head. In a thermal printer equipped with a cutter, either one of the upper blade and the lower blade of the cutter is attached, and an opening/closing operation part and an interlocking part are respectively provided on a roll paper insertion side and a roll paper ejection side with respect to the cutter. The formed cutter opening/closing member is rotatably provided so that the tip of the blade moves between a position adjacent to the roll paper and a position separated by a predetermined distance from that position, and the cutter opening/closing member contacts the interlocking part. The head mounting member to which the thermal head is attached is provided with an interlocked portion that contacts the thermal head and moves the thermal head in a direction away from the platen when the thermal head rotates.

[0009]

[Operation] When the opening/closing operation part formed on the cutter opening/closing member is rotated, the tip of the blade moves from a position adjacent to the roll paper to a position a predetermined distance apart, and at the same time the interlocking part rotates. The head mounting member rotates together with the interlocked part that abuts the interlocking part, and as a result, the thermal head separates from the platen.

0010

[Embodiment] An embodiment of the present invention will be explained based on FIG. As shown in FIG. 1, this thermal printer 11 has a thermal head 13 rotatably disposed in a direction toward and away from a platen 12, and a thermal head 13 on the roll paper discharge side of a pressure contact portion between the thermal head 13 and the platen 12. Cutter 1 nearby
4 is disposed, and a paper guide 15 is further disposed near the roll paper insertion side of the platen 12.

However, the cutter 14 includes a cutter opening/closing member 14b to which an upper blade 14a is attached, a lower blade 14c, and the like. The cutter opening/closing member 14b has an opening/closing operation part 14b1 and an interlocking part 14b2 formed on the roll paper insertion side and the roll paper discharge side with respect to the upper blade 14a, respectively. It is arranged on the rotation shaft 14d.

Further, the thermal head 13 is attached to a head attachment member 13b disposed on a rotating shaft 13a. At the end of the head mounting member 13b on the roll paper discharge side with respect to the thermal head 13, the interlocking portion 14b2 of the cutter opening/closing member 14b is provided.
A linked portion 13b1 that comes into contact with the head mounting member 13b is formed, and furthermore, the rotation shaft 13a of the head mounting member 13b
A spring 13c is attached to the opposite side of the interlocked part 13b1 that holds the
As a result, the thermal head 13 is urged in the direction of pressure contact with the platen 12.

In this configuration, when the opening/closing operation part 14b1 of the cutter opening/closing member 14b is rotated in the direction B, the tip of the upper blade 14a moves to a position a predetermined distance away from the position adjacent to the roll paper 16. move and at the same time,
The interlocking part 14b2 rotates, and the head mounting member 13b is rotated together with the interlocked part 13b1 that comes into contact with the interlocking part 14b2.
rotates in the C direction, and as a result, the thermal head 13
is separated from the platen 12. In this way, by rotating the opening/closing operation part 14b1 of the cutter opening/closing member 14b, the upper blade 14a and the lower blade 14c of the cutter 14 can be separated, and at the same time, the thermal head 13 and the platen 12 can be separated. It can be spaced apart.

Therefore, the work of inserting the roll paper 16 into the cutter 14 when setting the roll paper 16, and the work of removing the roll paper 16 stuck in the cutter 14 when a jam occurs, are facilitated.

[0015]

As described above, the present invention provides a thermal head that is rotatably disposed in the direction of contact with and away from the platen and is biased in the direction of pressure contact with the platen, and a roll paper ejecting device for the thermal head. In a thermal printer equipped with a cutter disposed on the side, either an upper blade or a lower blade of the cutter is attached and interlocked with an opening/closing operation unit on a roll paper insertion side and a roll paper ejection side with respect to the blade. A cutter opening/closing member is provided so as to be rotatable so that the tip of the blade moves between a position adjacent to the roll paper and a position spaced apart by a predetermined distance from that position. Since the head mounting member to which the thermal head is attached is provided with an interlocking part that abuts the interlocking part and moves the thermal head in a direction away from the platen when the interlocking part rotates, the opening/closing function formed on the cutter opening/closing member is provided. When the operation part is rotated, the tip of the blade moves from a position adjacent to the roll paper to a position a predetermined distance away, and at the same time, the interlocking part rotates, and the head is attached together with the interlocked part that comes into contact with this interlocking part. The member rotates, and as a result, the thermal head moves away from the platen. That is, by rotating the opening/closing operation section of the cutter opening/closing member, the upper blade and lower blade of the cutter can be separated, and at the same time, the thermal head and the platen can be separated. This facilitates the work of inserting the roll paper into the cutter when setting the roll paper, and the work of removing the roll paper jammed in the cutter when a jam occurs.

[Brief explanation of drawings]

FIG. 1 is a side view showing one embodiment of the present invention.

FIG. 2 is a side view showing an example of a conventional thermal printer.

FIG. 3 is an enlarged perspective view of the print head section.

[Explanation of symbols]

11 Thermal printer 12 Platen 13 Thermal head 13b Head mounting member 13b1 Interlocked part 14 Cutter 14a Upper blade 14b Cutter opening/closing member 14b1 Opening/closing operation part 14b2 Interlocking part 14c Lower blade 16 Roll paper

Claims (1)

[Claims] 1. A thermal head disposed rotatably in the direction of contact with and away from the platen and biased in the direction of pressure contact with the platen, and a cutter disposed on the roll paper ejection side with respect to the thermal head. In the thermal printer, one of the upper blade and the lower blade of the cutter is attached, and an opening/closing operation part and an interlocking part are respectively formed on the roll paper insertion side and the roll paper ejection side with respect to the blade. The opening/closing member is rotatably provided so that the tip of the blade moves between a position adjacent to the roll paper and a position spaced apart by a predetermined distance from the position adjacent to the roll paper. 1. A thermal printer, characterized in that a head mounting member to which the thermal head is attached is provided with an interlocked part that moves the thermal head in a direction to move the thermal head away from the platen during operation.