JP3033048B2 - Printer device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer for printing information such as characters and images on recording paper or the like.

[Conventional technology]

FIG. 5 is a view showing a conventional printer device, in which (1) is a recording paper for printing information, (2) is a paper feed roller for supplying the recording paper (1), and (3) is a paper feeding roller. A discharge roller for discharging the recording paper (1), (4) a platen roller for winding the recording paper (1), and (5) a recording paper (1)
(11) is an ink sheet formed by applying an ink to be applied to the recording paper (1) to a base film by heat generated by the head (5), and (10) is an ink sheet (11). ), (9) a take-up reel for winding the ink sheet (11), (6) a clamper for pressing and holding the recording paper (1) against a platen roller (4), (7) is a coil spring for pressing the clamper (6) against the platen roller (4), and (8) is mounted so as to be able to position the coil spring (7) and to be rotatable about the rotation axis of the platen roller (4). And a rotating arm having a shape capable of sliding the clamper (6) in the radial direction of the platen roller (4). (12) is a position of the clamper (6) which rotates together with the recording paper (1) during a printing operation. Detectable security Reference numerals (13) and (14) denote upper and lower discharge guides serving as discharge guides of the recording paper (1) during the discharge operation, and (15) a sensor wire for sending out sensor output.

Next, the operation will be described. The recording paper (1) is fed from the paper feed roller (2), and the clamper (6) is slid away from the platen roller (4) by an appropriate method to insert the recording paper (1). ) Is returned by the force of the coil spring (7), and the recording paper (1) is clamped between the clamper (6) and the platen roller (4).

Next, the platen roller (4) rotates in the direction indicated by the arrow in the figure, and winds the recording paper (1) around the platen roller (4). The head (5) moves up and down by an appropriate method when the clamper (6) approaches. The ink sheet (11) and the recording paper (1) are put together at a position where the clamper (6) and the head (5) do not hit. (5) performs the pinching operation.

Next, the platen roller (4) rotates and the clamper (6)
Passes through the position detected by the sensor (12), and at the timing of the change of the sensor output, the head (5) generates heat and starts the printing operation, where the ink sheet (11) is moved to the take-up reel (9). ). This operation is repeated three times to perform three-color printing.

After printing in three colors, the clamper (6) is slid away from the platen roller (4) by an appropriate method, and the recording paper (1) is fed into the discharge roller (3) by an appropriate method and is discharged. .

[Problems to be solved by the invention]

Since the conventional printer device is configured as described above, the paper feed roller is provided in the vicinity of the sensor (12) despite the fact that the mounting position of the sensor (12) determines the printing position on the recording paper (1). (2) and a paper discharge roller (3),
Strict restrictions were placed on the sensor installation position and the wiring of the sensor output line. In determining the relative position between the sensor (12) and the clamper (6), the chassis (1
The lower part of the discharge guide (14), the platen roller (4), the rotating arm (8), and many members such as the clamper (6) slidable on the rotating arm (8) are interposed. For this reason, there has been a problem that the printing position on the recording paper tends to vary due to the accumulation of dimensional tolerances.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and does not limit the arrangement of the paper feed rollers. It is an object of the present invention to obtain a printer device in which the number of parts to be attached to a chassis for determining a relative position is reduced and the printing position on a recording sheet is less varied due to the accumulation of dimensional tolerances.

[Means for solving the problem]

A printer device according to the present invention includes a platen roller that rotates in a predetermined direction, a rotating arm that is mounted on a side of the platen roller and that is rotatable around a rotation axis of the platen roller, A clamper rotatably mounted on the outer peripheral surface of the platen roller so as to press and hold the recording paper against the platen roller, a detection unit provided integrally with the clamper and extending outside the rotary arm, A sensor fixed to a side surface of the platen roller and fixed to a fixed surface of a bearing that receives the rotation axis thereof, and configured to detect a rotation angle position of the detection unit.

[Action]

According to the present invention, the relative position between the printing position of the recording paper held by the clamper and the detection unit can be set with high accuracy by the detection unit provided integrally with the clamper. Also, the sensor is located on the side surface of the platen roller, and is fixed on the same surface as the fixed surface of the bearing that receives the rotating shaft,
The rotation angle position of the detection unit is detected outside the rotating arm, which not only reduces the restrictions on the sensor mounting position, but also allows the printing position to be independent of the rotation stop position of the platen roller during paper clamping. Can be detected.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In the figure, (6A) is a clamper that presses and holds the recording paper (1) against the platen roller (4),
(6B) is a detection unit processed into an appropriate shape to use a part of the clamper (6A) as a sensor detection unit, and (12A) is a sensor capable of detecting the position of the detection unit (6B).

The other configuration is the same as that of the conventional one shown in FIG.

In such a configuration, as shown in FIGS. 1 and 2 showing the printing start state, the sensor (12A) is located at the side surface position of the platen roller (4), and the bearing of the bearing for receiving the rotation shaft thereof is provided. FIG. 3 shows the detection of the side of the detector (6B) when the detector (6B), which is fixed to the chassis (16) and is provided on the clamper (6A) on the same surface as the fixing surface, passes therethrough. The sensor output as shown in Fig. 7 is obtained.

On the other hand, the relative positional relationship between the detection unit (6B) and the paper holding unit of the clamper (6A) is such that when printing starts at the falling edge of the sensor output, as shown in FIG. A is the angle to the reference position (refers to the horizontal line of the mounting coordinate position of the bearing that receives the rotation axis of the platen roller (4) mounted on the chassis (16) shown in FIG. 2), and the detection center of the sensor (12A) Each angle is determined so that the relationship of C = A + B is satisfied, where B is the angle from to the reference position and C is the angle from the paper presser of the clamper (6A) to the edge of the detector (6B).

By performing the setting in this way, when the platen roller (4) rotates to the printing start position, the sensor (12A) obtains a sensor output by passing through the detection unit (6B). Here, by issuing a print command at a timing as shown in FIG. 3, a print operation similar to the conventional one can be performed.

Further, by arranging such a detection system, the mounting position of the sensor (12A) is adhered from the discharge guide (13) to the chassis (16) supporting the platen roller (4), so that the mounting portion is mounted. This reduces the space-related design constraints and eases the routing of the sensor wire (15) for the sensor (12A). In addition, the dimensional variation element (number of parts) that determines the relative position of the sensor (12A) and the clamper (6A) can be reduced, resulting in less variation in the printing start position and less variation in the printing position on recording paper and color shift. A small number of printer devices can be obtained.

In the above-described embodiment, the example in which the printing is started at the falling edge of the sensor output has been described. However, the same effect can be obtained by starting the printing at the rising edge of the sensor output.

In the above embodiment, the detector (6B) and the clamper (6A)
In the example shown in FIG. 4, the relative positional relationship between the paper pressing portions is such that the sum of the angle C and the angles A and B is equal. A similar effect can be obtained by obtaining a sensor output before and outputting a print command after a certain amount of rotation or a certain time after the sensor output.

In the above embodiment, the clamper (6A) and the detection unit (6B)
The same effect can be obtained even if the sensor is provided at another position or the clamper (6A) is directly detected by the sensor (12A).

〔The invention's effect〕

As described above, in the printer device of the present invention, the detection unit provided integrally with the clamper so as to extend on the side opposite to the clamper, and the bearing at the side position of the platen roller and receiving the rotation shaft thereof are fixed. A sensor fixed on the same surface as the surface detects the rotation angle position of the detection unit outside the rotating arm, which not only reduces the restrictions on the sensor installation position but also starts printing on recording paper The relative position between the position and the detection unit can be accurately determined, and therefore, the variation in the printing position on the recording paper and the color shift are reduced. In addition, since the clamper and the detection part of the sensor are integrated and rotatably mounted around the rotation axis of the platen roller, the printing position can be set independently of the rotation stop position of the platen roller during paper clamping. An effect that can be detected is obtained.

[Brief description of the drawings]

1 is a schematic side view showing one embodiment of the present invention, FIG. 2 is a top view of FIG. 1, FIG. 3 is a view showing a relationship between a sensor output and a printing command, and FIG. 4 is a clamper (6A). ) And detector (6B)
FIG. 5 is a schematic side view showing a conventional one. In the figure, (1) is a recording paper, (4) is a platen roller, (5) is a head, (6A) is a clamper, (8) is a rotating arm, and (12A) and (12B) are sensors. In the drawings, the same reference numerals indicate the same or corresponding parts.

Continuation of front page (56) References JP-A-61-262149 (JP, A) JP-A-60-22137 (JP, A) JP-A-56-51763 (JP, A) JP-A-58-62083 (JP, A) JP-A-63-249675 (JP, A) JP-A-54-49214 (JP, A) Japanese Utility Model Showa 58-185452 (JP, U) Japanese Utility Model Showa 55-36509 (JP, U) Japanese Utility Model Application 62-63157 (JP, U)

Claims (2)

(57) [Claims] A platen roller rotating in a predetermined direction.
A rotating arm (8) which is mounted on the side of the platen roller and is rotatable about a rotation axis of the platen roller; and the rotating arm presses and holds the recording paper against the platen roller. A clamper (6A) rotatably mounted on the outer peripheral surface of the platen roller, a detection unit (6B) provided integrally with the clamper and extending outside the rotary arm, and a side position of the platen roller And a sensor (12A) fixed on the same surface as a fixed surface of a bearing for receiving the rotation shaft and detecting a rotation angle position of the detection unit. 2. The method according to claim 1, further comprising the steps of: setting an angle from a clamper position to a reference position at the start of printing; setting an angle from a sensor detection center to a reference position; 2. The relationship is set as follows: C ≧ A + B, where C is the angle from the edge to the edge of the detection unit.
The printer device according to the above.