JPH0734684Y2 - Moving position detector for printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is used in the technical field of time recorders and the like, and more specifically, the moving position of a printer head (hereinafter simply referred to as a printer) is set. The present invention relates to a printer moving position detection device that can detect and print at a correct position on a print card.

[Conventional technology]

On the time card currently in use, for example, in addition to the regular entry / exit print fields, various print fields such as irregular work print fields and actual work time print fields are arranged side by side. When printing on such a time card using a printer such as a dot printer, the printer is controlled based on the setting data stored in the program memory of the time recorder, and the calculated attendance data is stored in the time card. It was necessary to print in the designated print field.

Therefore, conventionally, the position of the printer is detected by a timing plate that is driven by the feed mechanism of the printer carriage, or the sensor is installed at either end of the path in which the carriage moves, and the shielding plate on the carriage side The position of the printer is detected by shielding the sensor, and the attendance data is printed in a predetermined print field of the time card.

[Problems to be solved by the invention]

However, in the case of each of the detection devices as described above, there is a problem that it is not easy to change the detection position and it is difficult to set the detection position. Furthermore, the former detection device using a timing plate In the case of (1), there is a problem that the detection is rough and the printing position is deviated due to the influence of the gear ratio of the timing plate actuating mechanism, the division accuracy, or the accuracy of the driven mechanism. Further, in the case of the latter detection device described above, if sensors are provided at both ends, it is not possible to detect an intermediate position and there is a problem that it is not possible to follow various changes in the print field.

Therefore, the technical problem of the present invention is that the printing position of the printer can be extremely easily adjusted according to the change of the printing column of the printing card, and
It is to be able to change it accurately.

[Means for solving problems]

Means taken in the present invention to solve the above technical problems are as follows.

(1) Attach a sensor for detecting the moving position to a carriage equipped with a printer.

(2) A detection sheet provided with marks for printer position detection and home position detection, which can be detected by the sensor, is provided on the plate surface along the moving direction of the sensor in a replaceable manner.

However, the carriage in which the printer is mounted here means a carriage that reciprocates in the lateral direction by using a motor as a drive source to cause the mounted printer to perform the printing operation in the lateral direction.

[Action]

 The above means operate as follows.

According to the above-mentioned element (1), the sensor for detecting the moving position moves back and forth together with the reciprocating movement of the carriage carrying the printer.

The element of (2) above determines the printing operation position of the printer by detecting each mark made on the detection sheet by the sensor that moves together with the carriage, and prints various data in the predetermined print field of the print card. In addition, if the width of the printing column or the printing position changes due to the change of the printing card, another detection sheet whose mark position has been changed according to this can be replaced and stretched on the plate surface. It enables the printer to print according to the changed specifications of the print card.

As described above, the technical problems described above can be solved by the above means, and the problems of the conventional technology can be solved.

〔Example〕

Hereinafter, a preferred embodiment of the printer moving position detecting device according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a front view of a printing apparatus equipped with the present invention, FIG. 2 is a sectional view taken along the line AA, and FIG. 2 is a plan view. Left and right frames 1a, 1b
A guide shaft 2 installed between the two is a carriage movably attached to the guide shaft 1, and 3 is a printer such as a dot printer mounted on the carriage 2. Also,
In the enlarged sectional views shown in FIGS. 2, 3 and 4, 4 is a guide roller attached to the rear surface of the carriage 2, and the roller 4 is provided between the left and right frames 1a and 1b. The main frame 5 is fitted into a guide groove 5a provided in a concave shape to guide the movement of the carriage 2.

Further, in the figure, 6 is a position detecting sensor attached to the back surface of the carriage 2 and is composed of a light emitting element and a light receiving element. Further, in FIG. 1 to FIG. 6, reference numeral 7 is a detection sheet which is formed of a thin transparent plastic plate as a whole, and the detection sheet 7 has an engaging hole 7a formed at one end as shown in FIG. With the tip of the spring 8b suspended in the locking hole 7b formed in the other end while engaging with the locking projection 8a, the main frame 5 is replaceably stretched on the seat mounting base 5b. In addition, the front edge side of the detection sheet 7 is interposed between the sensors 6. 7p ... is a mark for printer position detection provided on the upper surface of the detection sheet 7, and 7h is a home position mark also provided on the upper surface of one end side of the detection sheet 7, and these marks 7p ... and 7h are shown. By detecting the sensor 6 while the carriage 2 is moving, the printer 3
It is designed to detect the position of.

In addition, each of the marks 7p and 7h above is a colored tape for detecting sheet 7.
Although it is formed by adhering it to a predetermined position of the above, it can also be formed by directly painting on a predetermined position of the detection sheet 7. Further, the detection sheet 7 provided with the marks 7p and 7h is prepared with a plurality of types having different mark positions according to the specifications such as the print column width and print position of the print card (time card). A detection sheet 7 suitable for the print card to be used is selected from the inside and stretched on the mounting base 5b.

Further, in FIGS. 1 to 3, 10 is a left and right gear roller.
An endless internal tooth belt (timing belt) is provided between 10a and 10b, and the mounting portion 2a of the carriage 2 is clamped and fixed in the middle of the belt 10. Reference numeral 11 denotes a motor that rotates the one gear roller 10a in the forward and reverse directions. When the motor 11 is driven, the internal tooth belt 10 rotates to move the carriage 2 and the printer 3 prints along the guide shaft 1 in the lateral direction. Made of In FIGS. 1 and 2, reference numeral 12 is a ribbon cassette, which contains two color endless print ribbons 13 whose upper part is black and whose lower part is red. Both sides of the cassette 12 are rotated to the left and right frames 1a and 1b. A ribbon cassette 12 is movably supported by a cam 14a attached to the end of the solenoid 14.
Is rotated up and down to perform two-color conversion.

Reference numeral 15 is a spot prevention plate fitted to the print head of the printer 3, and the print ribbon 13 is suspended in the print head of the printer 3 by being inserted into the prevention plate 15. 16a, 16b
Is a left and right card guide attached to the guide shaft 1 so as to be movable left and right, and in FIG. 2, 17 is a platen.

Since the printer moving position detecting device according to the present invention is configured as described above, the sensor 6 detects the mark 7h of the detecting sheet 7 in the printer 3 that moves according to the rotation of the internal tooth belt 10 driven by the motor 11. By doing this, the home position can be detected, and the detection sheet 7 can be attached to other marks 7p ...
It is possible to detect the width of the print field, the print start position, etc., by detecting each of the above. Therefore, the control mechanism (not shown) on the recorder side constituted by using the microcomputer controls the printer 3 according to this detection signal. Thus, it is possible to correctly print various data in the predetermined print field of the inserted print card.

On the other hand, when the print column width, the print start position, or the like is changed due to the use of the print cards of different styles, the detection sheet that meets the specifications of the changed print card is selected from the detection sheets 7 prepared in advance. By selecting 7 and replacing it with the existing detection sheet 7 and tensioning it on the mounting base 5b, the printer 3 can be controlled and operated according to the specifications of the replaced printing card. It is not necessary to change the program of the control mechanism each time it changes, and it is possible to deal with the change easily.

〔effect〕

As described above, according to the printer moving position detecting device of the present invention, the printer can be adjusted to the specifications of the printing card only by exchanging and extending the detection sheet that matches the specifications of the printing card to be changed. Since the control can be operated, the change work is much simpler than the conventional method of changing the control program, and the position of the detection plate or the sensor can be changed by simply replacing the detection sheet and tensioning it. Compared with the conventional device that moves and copes with the change, it has an advantage that the change work can be performed easily and accurately, and the detection sheet has a thin transparent plastic plate to which tape is adhered or painted. In combination with the fact that it can be manufactured simply and at low cost, it is suitable for use in a printer such as a time recorder.

[Brief description of drawings]

FIG. 1 is a front view showing an example of a printing machine equipped with a detection device according to the present invention, FIG. 2 is a sectional view taken along the line AA in FIG. 1, and FIG. 3 is a ribbon cassette and a card guide. FIG. 4 is an enlarged cross-sectional view of a main part, and FIG. 5 is a perspective view showing an example of a detection sheet. 2 is a carriage, 3 is a printer, 6 is a sensor, 7 is a detection sheet, and 7p and 7h are detection marks.

Claims (2)

[Scope of utility model registration request] 1. A carriage for mounting a printer is provided with a sensor for detecting a moving position, and a plate surface provided along the moving direction of the sensor is used for detecting a printer position and a home position which can be detected by the sensor. A moving position detecting device for a printer, in which a detection sheet having each mark is stretched in a freely replaceable manner. 2. The moving position detecting device for a printer according to claim 1, wherein the detection sheet is made of a transparent thin plastic plate.