JPH11320936A - Thermal line printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermal line printer capable of removing a tendency to curl or a static electricity which may occur on a recording paper after printing and to readily reduce the device body thereof in a simple structure without increasing the number of components and the cost. SOLUTION: A curl correcting member 7a for removing a tendency to curl of a recording paper 2 is integrally formed with a head supporting member 7 of a thermal head 3. The head supporting member 7 including the curl correcting member 7a is made of a conductive material. As a result, it is possible to remove a tendency to curl and a static electricity which may occur on the recording paper 2 after printing, in a simple structure without increasing the number of components and the cost and to readily reduce the device body in size.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a thermal line printer incorporated in an output terminal such as a POS, an ECR, a handy terminal or a measuring device.

[0002]

2. Description of the Related Art Conventionally, there has been proposed a printer disclosed in Japanese Patent Application Laid-Open No. 62-152880 as a mechanism for correcting the curl of recording paper of a thermal line printer.

FIG. 4 is a schematic sectional view showing the configuration of a recording paper curl correcting mechanism according to the above publication. In FIG. 4, 10
1 is a main body chassis, 102 is a recording paper, 103 is a thermal head, 104 is a recording paper 102
Platen roller for feeding paper while pressing
Reference numeral 5 denotes a curl correcting member for abutting the recording paper 102 to correct the curl of the recording paper in the reverse direction; 106, a curl correcting roller; 107, a head supporting member for supporting the thermal head 103; 102
Is an elastic body that comes into pressure contact with the platen roller 104 through the contact hole.

The curl correction of the recording paper by the curl correction mechanism of the recording paper of the conventional thermal line printer configured as described above will be described with reference to FIG.

The recording section of the printer is a thermal head 10
The recording paper 102 is pressed by the thermal head 103 by the platen roller 104 and is heated and printed by the thermal head 103.

The printed recording paper 102 is discharged from the recording section to the right in FIG. 4 by the rotation of the platen roller 104.
When the recording paper 102 passes through the recording section, the platen roller 104
And the contact surface with the thermal head 103 is thermally expanded by heating the printing surface of the recording paper 102 during printing.
The recording paper 102 that has passed through the recording unit has a curl habit. Curl straightening member 10 provided behind printing position
The configuration is such that the curl of the recording paper 102 is corrected by passing the recording paper 102 between the recording paper 102 and the curl correction roller 106. That is, the curl correction is performed while the recording paper 102 is bent in the direction opposite to the curl habit.
5 and the curl correction roller 106.

Further, as a mechanism for removing static electricity from recording paper of a conventional thermal line printer, there have been proposed:
There is a thermal recording apparatus disclosed in Japanese Utility Model Laid-Open Publication No. 62-136348.

FIG. 5 is a schematic sectional view showing the configuration of a mechanism for removing static electricity from a recording sheet according to the publication. In FIG.
1 is a main body chassis, 102 is a recording paper, 103 is a thermal head, 104 is a recording paper 102
Platen roller for feeding paper while pressing
Reference numeral 8 denotes an elastic body that presses the thermal head 103 against the platen roller 104 via the recording paper 102. Reference numeral 109 denotes a static elimination brush provided integrally with the thermal head 103.

The static electricity elimination mechanism of the recording paper of the conventional thermal line printer configured as described above will be described with reference to FIG.

The recording section of the printer includes a thermal head 10
The recording paper 102 is pressed by the thermal head 103 by the platen roller 104 and is heated and printed by the thermal head 103.

The printed recording paper 102 is discharged from the recording section to the right in FIG. 5 by the rotation of the platen roller 104.
The recording paper 102 is charged with static electricity generated by sliding contact with the thermal head 103 when passing through the recording section,
The static elimination brush 109 is configured to contact the recording paper 102 passing through the recording unit and remove the static electricity.

That is, the static electricity removal of the recording paper 102 is performed by the static elimination brush 109 provided integrally with the thermal head 103 after passing through the recording section. Static elimination brush 109
As shown in the figure, the static electricity is removed by contacting the recording paper 102 by protruding on the route through which the recording paper 102 passes.

[0013]

However, in recent years, printers incorporated with the downsizing of equipment have also been tending to be downsized. However, the curl straightening mechanism of the recording paper of the thermal line printer is required to have a recording paper passing route after printing. In order to remove the static electricity of the recording paper, it is necessary to newly install a curl correcting member and a curl correcting roller, which hinders the miniaturization of the printer, increases the number of parts, and complicates the structure and increases the cost. The necessity of newly providing a neutralization brush after passing through the recording unit hinders downsizing of the device, and increases the number of parts, resulting in a problem that the structure becomes complicated and causes an increase in cost.

The present invention solves such a conventional problem,
The object of the present invention is to provide a thermal line printer capable of removing curling and static electricity generated on a recording sheet after printing with a simple structure without increasing the cost by increasing the number of parts and easily realizing a compact device. And

[0015]

SUMMARY OF THE INVENTION In order to solve this problem, a thermal line printer according to the present invention comprises a platen roller rotatably supported by a main body chassis, a rotation driving means for the platen roller, and a line type thermal printer. A head, a recording paper, an elastic body that presses the line-type thermal head against a platen roller via the recording paper, and a back surface of the recording paper printed by the line-type thermal head by contacting the recording paper. It has a configuration of a curl correcting section for correcting the discharge direction, and a head supporting member for holding the line type thermal head integrated with the curl correcting section.

According to the structure of the present invention, since a curl correcting member and a curl correcting roller are not newly provided, the number of components is increased and the cost is not increased. A thermal line printer that can be removed is obtained.

Further, by using a conductive member for the head support member integrated with the curl correction section, not only can the curl habit occurring on the recording paper discharged after printing be removed, but also a new static electricity removing member such as a static elimination brush can be used. The thermal line printer which can remove static electricity generated on the recording paper after printing with a simple structure without increasing the number of parts and increasing the cost since no component is provided can be obtained.

Further, by providing a curl correcting portion made of a conductive member and a projection which comes into contact with the recording surface of the recording paper integrated with the head support member, the curl generated on the recording paper discharged after printing can be removed. In addition, a thermal line printer that can remove static electricity on the back side of the recording paper and both sides of the recording surface with a simple structure without increasing the number of parts and increasing the cost because there is no new static electricity removing member such as a static elimination brush is obtained. Can be

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to the first aspect of the present invention is directed to a platen roller rotatably supported on a main body chassis, a rotation driving means for the platen roller, a line type thermal head, and a recording paper. And an elastic body that presses the line-type thermal head against a platen roller via a recording sheet and a back surface of the recording sheet printed by the line-type thermal head, to correct the discharge direction of the recording sheet. This is a thermal line printer having a configuration of a curl correcting unit and a head support member that holds the line type thermal head integrated with the curl correcting unit, and the number of parts is reduced because a curl correcting member and a curl correcting roller are not newly provided. This has the effect that the curl generated on the recording paper after printing can be eliminated with a simple structure without increasing the cost by increasing the number of prints.

According to a second aspect of the present invention, there is provided the thermal line printer according to the first aspect, wherein the head supporting member integrated with the curl correcting section is a conductive member, and is discharged after printing. In addition to the ability to easily correct the curl of recording paper, there is no need to add a static elimination member such as a static elimination brush. It has the effect that static electricity charged on the recording paper can be removed by the sliding contact of the head.

According to a third aspect of the present invention, there is provided a platen roller rotatably supported on a main body chassis, a rotation driving means for the platen roller, a line-type thermal head, a recording sheet, and the line. An elastic body that presses the type thermal head against the platen roller via the recording paper, and a curl correction unit that corrects the discharge direction of the recording paper by contacting the back side of the recording paper printed by the line type thermal head. A thermal line printer comprising: a head support member made of a conductive member for holding the line type thermal head; and a static elimination protrusion that abuts a recording surface of a recording paper integrated with the curl correction unit and the head support member. Not only can easily correct the curl generated on the recording paper discharged after printing, but also do not provide a new static elimination member such as a static elimination brush. A simple structure without increasing costs by increasing the Luo parts, has the effect of static electricity on the back surface and the recording surface side of the recording paper can be removed.

An embodiment of the present invention will be described below with reference to FIGS. (First Embodiment) FIG. 1 is a sectional view of a thermal line printer according to a first embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a main body chassis of a printer, 2 denotes recording paper, 3 denotes a thermal head, 4 denotes a platen roller for feeding the recording paper 2 while pressing the recording paper against the thermal head 3, and 7 denotes a head support member. Reference numeral 8 denotes an elastic body that presses the thermal head 3 against the platen roller 4 via the recording paper 2. Reference numeral 7 a denotes a curl correction unit provided integrally with a head support member 7 that contacts the recording paper 2 printed by the thermal head 3. It is a member.

The operation of the embodiment will be described below with reference to FIG. The recording paper 2 is guided between the thermal head 3 and the platen roller 4. The recording paper 2 sandwiched between the thermal head 3 and the platen roller 4 is pressed against the thermal head 3 by the pressure of the elastic body 8. By controlling the timing of the energization of the thermal head 3 and the energization of the motor which is the rotation driving means (not shown) of the platen roller 4, the recording paper 2 can print on the recording surface (the contact surface with the thermal head 3). It is sent in the discharge direction while being made. The curl of the printed recording paper 2 is curled clockwise as shown in the drawing, and is discharged.
The recording paper 2 is bent in a direction opposite to the curl habit, the curl is corrected, and the recording paper 2 is discharged.

The thermal line printer obtained as described above has a configuration in which the curl correcting member 7a is provided integrally with the head support member 7 to correct the curl of the recording paper 2. Since the curl correction roller is not provided, an advantageous effect that the curl of the recording paper 2 after printing can be removed with a simple structure without increasing the number of parts can be obtained.

(Embodiment 2) FIG. 2 is a sectional view of a thermal line printer according to a second embodiment of the present invention.

In FIG. 2, the description of the same reference numerals as in FIG. 1 is omitted, but reference numeral 7 denotes a head support member made of a conductive material.
a is a curl correction member provided integrally with the head support member 7 made of a conductive material.

The operation of the second embodiment will be described below with reference to FIG. The operation for correcting the curl of the recording paper 2 is the same as that of the first embodiment, and thus the description thereof is omitted. However, the recording paper 2 is sandwiched between the thermal head 3 and the platen roller 4 and the thermal head is pressed by the elastic body 8. 3 and printed. At this time, the recording paper 2 is charged with static electricity generated by sliding contact with the surface of the thermal head 3.
Since the recording paper 2 after printing comes into contact with the curl correcting member 7a provided integrally with the head support member 7 made of a conductive member, the charged static electricity is removed while the curl is corrected.

The thermal line printer obtained as described above has a configuration in which the head support member 7 integrally provided with the curl correcting member 7a is made of a conductive member, and performs curl correction and static elimination of the recording paper 2 at a time. Therefore, not only can the curl generated on the recording paper 2 discharged after printing be easily corrected, but also a simple structure without increasing the cost by increasing the number of parts by not newly providing a static elimination member such as a static elimination brush. Recording paper 2 and thermal head 3 when printing with
Has an advantageous effect that static electricity charged on the recording paper 2 can be removed by the sliding contact.

(Embodiment 3) FIG. 3 is a sectional view of a thermal line printer according to a third embodiment of the present invention.

In FIG. 3, reference numerals overlapping with those in FIGS. 1 and 2 are omitted, but reference numeral 7b abuts on the recording surface of the recording paper 2 after printing provided integrally with the head support member 7 made of a conductive material. It is a static elimination protrusion.

The operation of the embodiment will be described below with reference to FIG. The operation for correcting the curl of the recording paper 2 is the same as that of the first embodiment, and thus the description thereof is omitted, but the recording paper 2 is composed of the thermal head 3 and the platen roller 4.
Is pressed by the thermal head 3 by the pressure of the elastic body 8 and printing is performed. At this time, the recording paper 2 is charged with static electricity generated by sliding contact with the surface of the thermal head 3. After printing, the recording surface of the recording paper 2 abuts against a static elimination protrusion 7b provided integrally with a head support member 7 made of a conductive member to remove the charged static electricity, and the back surface of the recording paper 2 is integrated with the head support member 7. The static electricity is removed simultaneously with the curl correction by contacting the curl correction member 7a provided in the above. The recording surface of the recording paper 2 after printing is a portion that is in direct sliding contact with the thermal head 3, and the recording paper 2 is also a portion where the electrostatic charge is large. A higher static elimination effect can be obtained by directly eliminating the static electricity from this portion.

The thermal line printer obtained as described above has a configuration in which a curl correcting section made of a conductive member and a static elimination projection 7b for bringing the recording surface of the recording paper 2 integral with the head support member 7 into contact are provided. Therefore, not only can the curl generated on the recording paper 2 discharged after printing be easily corrected, but also a simple structure without increasing the cost by increasing the number of parts by not newly providing a static elimination member such as a static elimination brush. Paper 2 and thermal head 3 when printing with
Has an advantageous effect that static electricity charged on the back surface of the recording paper 2 and both sides of the recording surface can be removed by the sliding contact.

[0034]

As described above, the thermal line printer according to the present invention comprises a curl correcting section for correcting the discharge direction of the recording paper by bringing the back side of the recording paper printed by the line type thermal head into contact with the curl correcting section. Since it has a configuration including a straightening unit and a head support member that holds the line type thermal head integrated with the straightening unit, it is possible to simply correct the curl of the recording paper after printing with a simple structure without increasing the number of parts. In addition, a simple structure without increasing the number of parts and increasing the cost by providing a static elimination protrusion that abuts the recording surface of the recording paper integral with the curl correction unit and the head support member made of a conductive member, An advantageous effect is obtained in that curling and static electricity generated in the recording paper can be removed and the size of the apparatus can be easily reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a thermal line printer according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the thermal line printer according to the second embodiment;

FIG. 3 is a sectional view of the thermal line printer according to the third embodiment;

FIG. 4 is a cross-sectional view illustrating a recording paper curl correcting mechanism of a conventional thermal line printer.

FIG. 5 is a cross-sectional view illustrating a mechanism for removing static electricity from recording paper of a conventional thermal line printer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body chassis 2 Recording paper 3 Thermal head 4 Platen roller 7 Head support member 7a Curl correction member 7b Static elimination protrusion 8 Elastic body

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Satoshi Yamaura 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (3)

[Claims] 1. A platen roller rotatably supported by a main body chassis, a rotation driving means for the platen roller, a line type thermal head, a recording sheet, and a platen roller connected to the line type thermal head via a recording sheet. An elastic body that presses against a roller, a curl correction unit that corrects the recording paper discharge direction by bringing the back surface of the recording paper printed by the line type thermal head into contact, and the line thermal unit integrated with the curl correction unit. A thermal line printer comprising a head supporting member for holding a head. 2. The thermal line printer according to claim 1, wherein the head support member integrated with the curl correction section is a conductive member. 3. A platen roller rotatably supported by a main body chassis, rotation driving means for the platen roller, a line-type thermal head, a recording sheet, and a platen roller via the recording sheet. An elastic body that presses against a roller, a curl correction unit that corrects the recording paper discharge direction by bringing the back side of the recording paper printed by the line type thermal head into contact, and a conductive member that holds the line type thermal head A thermal line printer comprising: a head support member made of: and a static elimination protrusion that abuts the recording surface of the recording paper integrated with the curl correction unit and the head support member.