JP2002145500A - Printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printer to guide a printing paper sheet so that the printing paper sheet is prevented from deviation from a paper conveying coarse through simple and low-cost constitution and easily mount the roll-form printing paper sheet. SOLUTION: A paper guiding member is rotatably supported on a paper guide member shaft and by rotating the paper guide member around the paper guide member shaft, switching to a paper guide position to which guide the printing paper sheet is guided and a moving-aside position to which movement aside is effected during charging of the printing paper sheet is practicable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer,
In particular, the present invention relates to a paper guide structure of a printer capable of performing printing on roll paper.

[0002]

2. Description of the Related Art Conventionally, a printer, such as a label printer, for printing by inserting a roll-shaped printing paper between a platen and a line thermal head is known. Such a printer is designed to keep the roll paper in a printing gap formed between the platen and the line thermal head at a constant position in the width direction (side direction perpendicular to the feeding direction). A paper guide member is provided upstream of the print gap in the paper transport direction to regulate the position of the print paper in the width direction (side direction). And, in the conventional printer, when the print paper is inserted through the print gap and set, it is difficult to insert the print paper from the paper transport direction because the paper is a roll paper and is curled. Width direction (side direction)
The printing gap is open on one side in the width direction (side direction) so that the printing gap can be inserted through the printing gap. The paper guide member is arranged at a position sufficiently distant from the printing gap so as not to be in the way when the printing paper is inserted into the printing gap from the open side.

[0003]

However, in the conventional printer, the paper guide member is separated by a considerable distance so as not to be obstructed when the paper is set. There was a problem that it could not be regulated accurately.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an improved printer capable of feeding paper straight into a printing gap during a printing operation and easily setting paper in the printing gap. Is to provide.

[0005]

In order to achieve the above object, according to the present invention, a platen and a sheet which is disposed to face the platen and which is fed along a predetermined sheet transport path are provided. A print head that performs printing, and a paper guide member that is disposed upstream of the print head in the paper feed direction and regulates the paper position in a side direction that is a direction orthogonal to the paper feed direction of the paper. Wherein the paper guide member is movably fixed between a paper guide position for guiding the paper and a retracted position where the paper is not obstructed when the paper is set from the side. And

Further, the paper guide member can be fixed to an arbitrary position in the side direction.

Further, the guide member is provided to be long in the side direction and has a hole for inserting a paper guide member support shaft having a polygonal cross section in the side direction, and an elastic member. The guide member support shaft is urged toward one side of the hole so as to be movably fixed between the paper guide position and the retracted position between the paper guide position and the retracted position.

The paper guide member supporting shaft is characterized in that the cross-sectional shape is a quadrangle.

Further, the elastic member is a leaf spring.

Further, the leaf spring is formed of a metal material.

Further, the leaf spring is made of a plastic material.

Further, the leaf spring is formed integrally with the paper guide member.

Further, the paper is a roll paper formed in a roll shape.

Further, the roll paper is Laval paper in which a label paper is pasted on a backing paper.

Further, the printer has a roll paper support shaft for rotatably supporting the roll paper.

[0016] The printing is characterized by a line thermal head.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below based on an embodiment with reference to the drawings. FIG. 1 is a right side view showing a printer according to an embodiment of the present invention as viewed from the right side. FIG. 2 is a partially detailed view showing the state of arrow A shown in FIG. 1 in an enlarged manner. 3A and 3B show the structure of the paper guide member, wherein FIG. 3A is a cross-sectional view showing a cross section taken along the line BB shown in FIG. 2, and FIG. 3B is a cross-sectional state showing a cross section taken along the line CC shown in FIG. FIG. FIG. 4 is a detailed explanatory diagram for explaining the structure and operation of the sheet guide member by further enlarging FIG. 3B. FIG. 5 is a detailed explanatory view showing a state in which the paper guide member is rotated in the direction of arrow b from the state shown in FIG. FIG. 6 is an operation explanatory view showing a state in which the paper guide member is rotated in the direction of arrow b from the state shown in FIG.

Referring to FIG. 1, a printer according to an embodiment of the present invention will be described. In the frame 1, a roll paper support shaft 2 and a buffer roller shaft 4 are erected. Buffer roller shaft 4
, A buffer roller 5 is rotatably mounted. The frame 1 has a lower frame auxiliary member 6 attached thereto. A paper guide member shaft 7 is erected between the frame body 1 and the lower frame body auxiliary member 6, and a paper guide member 8 is provided on the paper guide member shaft 7.
Are rotatably mounted. The lower frame auxiliary member 6 is provided with a paper feed member 9 for driving the print paper 15 by being driven by the paper feed motor 10. Further, an upper frame body auxiliary member 11 is attached to the frame body 1. A print head support member 12 is attached to the upper frame auxiliary member 11, and a print head 13 is attached to the print head support member 12. The upper frame body auxiliary member 11 is provided with an ink ribbon first winding frame 14a around which one end of the ink ribbon 14 is wound, and an ink ribbon second winding frame 14b around which the other end of the ink ribbon 14 is wound. I have. In this embodiment, the print head 13 uses a line thermal head. The printing paper 15 may be a roll of label paper having label paper glued to a backing paper.

A roll-shaped printing paper 15a obtained by winding a printing paper 15 in a roll shape is rotatably mounted on the roll-paper supporting shaft 2. The roll-shaped printing paper 15a is
The paper is held down by the roll paper holding member 3 so as not to fall off the paper. The printing paper 15 pulled out from the roll-shaped printing paper 15a is mounted so as to travel on a paper conveyance course around the buffer roller 5, the paper feeding member 9, and the print head 13 and to be discharged from the front of the printer.
The paper guide member 8 guides the print paper 15 at the paper guide position a so that the print paper 15 does not come off the paper transport course.

Referring to FIG. 2, the schematic structure of the sheet guide member 8 will be described. A paper guide member shaft 7 is erected between the frame body 1 and the lower frame body auxiliary member 6, and a paper guide member 8 is rotatably attached to the paper guide member shaft 7. The paper guide member 8 is a guide member handle 8 for rotating and moving in the axial direction by operating with a finger.
a is formed.

Referring to FIG. 3, a state in which the sheet guide member 8 is assembled to the sheet guide member shaft 7 will be described.
The paper guide member shaft 7 is a prism having a square cross section. The paper guide member 8 has a hole 8 b rotatably fitted to the paper guide member shaft 7. The paper guide member 8 includes
The elastic member 8c is attached by a mounting screw 8d, and the free end of the elastic member 8c presses one surface of the paper guide member shaft 7 having a rectangular cross section. Therefore, the paper guide member 8 is fixed with a frictional force to the paper guide member shaft 7, and can be moved in the axial direction according to the width of the printing paper 15 by manually operating the paper guide member 8. It has become. When the width of the printing paper 15 is w1, it is fixed at the position indicated by the solid line. When the width of the printing paper 15 is w2, it is moved in the direction of arrow a to move the paper guide member 8 by an imaginary line. Secure in the position shown.

Referring to FIG. 4, a state in which the sheet guide member 8 is rotatably mounted on the sheet guide member shaft 7 will be described. The paper guide member shaft 7 is a prism having a square cross section. The paper guide member 8 has a hole 8 b rotatably fitted to the paper guide member shaft 7. An elastic member 8c is attached to the sheet guide member 8 by a mounting screw 8d, and a free end of the elastic member 8c presses one surface of a sheet guide member shaft 7 having a rectangular cross section. Therefore, the paper guide member 8 is fixed with a frictional force to the paper guide member shaft 7, and the rotation in the counterclockwise direction is regulated by the guide member stopper 6 a erected on the frame 1. The paper guide member 8 can be rotated in the direction of arrow c by operating the paper guide member with fingers. Since the free end of the elastic member 8c is pressed against one surface of the paper guide member shaft 7 having a rectangular cross section, the paper guide member 8 may be accidentally rotated from the paper guide position a shown in FIG. There is no.

Referring to FIG. 5, the operation of rotating the paper guide member 8 from the paper guide position a shown in FIG. 4 will be described. When the paper guide member 8 is rotated by manually operating the paper guide member 8 in the direction of arrow c, the free end of the elastic member 8c is pressed against one surface of the paper guide member shaft 7 having a rectangular cross section. The paper guide member shaft 7 is pressed over the corner of the paper guide member shaft 7 and presses against the adjacent surface of the paper guide member shaft 7.
The counterclockwise rotation is restricted by the guide member stopper 6a. Therefore, the paper guide member 8 pivots from the paper guide position a shown in FIG. 4 to the retreat position b shown in FIG. 5 with a click feeling, and does not accidentally pivot from the retreat position b.

Referring to FIG. 6, a state in which the paper guide member 8 is rotated in the direction of arrow b from the state shown in FIG. 1 to mount the roll-shaped printing paper 15a will be described. When the sheet guide member 8 is rotated from the state shown in FIG. 1 in the direction of arrow c to the state in which the sheet guide member 8 is located at the retracted position b shown in FIG. It becomes easy to mount the printing paper 15 on the paper conveyance course of the printing paper 15 passing so as to face the print head 9 and the print head 13. After the printing paper 15 is mounted, the printing paper 15 is rotated by rotating the paper guide member 8 from the state shown in FIG. 6 in the direction opposite to the arrow b to be in the paper guiding position a shown in FIG. Provide guidance so that it does not fall off the paper transport course.

[0025]

According to the present invention, as described above, the paper guide member 8 is rotatably supported by the paper guide member shaft 7,
The printing paper 15 can be switched between a paper guiding position for guiding the printing paper 15 by rotating with respect to the paper guiding member shaft 7 and a retracting position for retracting when the printing paper is loaded. Guide the paper so that it does not come off, and
This can be easily done when the 5a is mounted.

[Brief description of the drawings]

FIG. 1 is a right side view illustrating a state of a printer according to an embodiment of the present invention when viewed from the right side.

FIG. 2 is an enlarged partial view showing a state of arrow A shown in FIG. 1;

3A and 3B show a structure of a paper guide member, FIG. 3A is a cross-sectional view showing a state of a cross section taken along line BB shown in FIG. 2, and FIG.
It is sectional drawing which shows the state of CC cross section shown to (a).

FIG. 4 is an enlarged detail view of FIG. 3B for explaining the structure and operation of the paper guide member.

FIG. 5 is a detailed explanatory view showing a state in which the paper guide member is rotated in the direction of arrow b from the state shown in FIG.

FIG. 6 is an operation explanatory diagram showing a state in which the paper guide member is rotated in the direction of arrow b from the state shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame 2 Roll paper support shaft 3 Roll paper holding member 4 Buffer roller shaft 5 Buffer roller 6 Lower frame auxiliary member 7 Paper guide member shaft 8 Paper guide member 9 Paper feed member 10 Paper feed motor 11 Upper frame auxiliary member 12 Print head Supporting member 13 Print head 14 Ink ribbon 14a Ink ribbon first winding frame 14b Ink ribbon second winding frame 15 Printing paper 15a Roll printing paper

Claims (12)

[Claims] 1. A platen, a print head arranged to face the platen and performing printing on a sheet fed along a predetermined sheet transport path, and a print head in the feed direction of the sheet from the print head. A paper guide member that is disposed on an upstream side and regulates the paper position in a lateral direction that is a direction orthogonal to the paper feed direction of the paper, wherein the paper guide member guides the paper. A printer characterized in that the printer is movably fixed between a paper guide position and a retracted position which does not interfere with the setting of the paper from the side. 2. The printer according to claim 1, wherein the paper guide member can be fixed at an arbitrary position in the side direction. 3. The guide member has a hole that is long in the side direction, and has a hole through which a paper guide member support shaft having a polygonal cross section in a side direction is inserted, and an elastic member. The paper guide position and the retracted position are movably fixed between the paper guide position and the retracted position by urging a guide member support shaft toward one side of the hole. Printer. 4. The printer according to claim 1, wherein said cross-sectional shape of said paper guide member support shaft is quadrangular. 5. The printer according to claim 3, wherein the elastic member is a leaf spring. 6. The printer according to claim 5, wherein the leaf spring is formed of a metal material. 7. The printer according to claim 5, wherein the leaf spring is made of a plastic material. 8. The printer according to claim 7, wherein the leaf spring is formed integrally with the paper guide member. 9. The paper according to claim 1, wherein the paper is a roll paper formed in a roll shape.
Printer according to. 10. The roll paper according to claim 9, wherein the roll paper is laval paper having a label paper attached to a backing paper.
Printer according to. 11. The printer according to claim 9, wherein the printer has a roll paper support shaft that rotatably supports the roll paper. 12. The printer according to claim 1, wherein the printing is performed by a line thermal head.