JP2504264Y2 - Print head drive mechanism of recorder - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive mechanism of a print head in a recorder connected to a computer or the like and used for recording various analysis results.

[0002]

2. Description of the Related Art In a recorder of this type, for example, a pen recorder, a recording pen records data such as an analysis result on a recording paper which is fed to the outer peripheral surface of a platen by a paper feeding means. The recording pen is adapted to reciprocate along the rotational axis direction of the platen according to the value of data to be recorded, and further, a print head for performing predetermined printing on the recording paper on the platen. There are some with.

FIG. 3 shows an example of the construction of such a conventional recorder. In the figure, a recording paper 2 of a predetermined width is wound around a part of the outer peripheral surface of a cylindrical platen 1, and The recording paper 2 is sent out by the platen 1 which is rotated at a predetermined speed by a paper feeding means (not shown). The plurality of recording pens 3, 4, 5 are mounted so as to be capable of reciprocating movement by a guide rod (not shown) horizontally mounted on the recording paper 2 so as to be parallel to the platen 1. Recording pen 3,4
The reciprocating motion of 5 is performed by a driving means such as a stepping motor connected to a computer control circuit, and the input data of the measured value such as temperature input to the computer control circuit drives the stepping motor. The recording pens 3, 4 and 5 are reciprocally moved in the width direction of the recording paper according to the value of the input data by the operation of the stepping motor which is processed as a signal and driven and controlled by the stepping motor, and the recording pen is analogized to the recording paper. Record the data.

Further, in FIG. 3, reference numeral 6 denotes a sensor carriage which is reciprocally mounted by a guide rail 7 which is horizontally mounted on the recording paper 2, and reference numerals 8, 9 and 10 are fixed to the sensor carriage 6, respectively. A position detector, which is provided with a photo interrupter or the like, that is capable of detecting the positions of the recording pens 3, 4, and 5, and 11 is a sensor, such as a stepping motor, that is connected to the computer control circuit. Cart drive motor, 12 is sensor cart drive motor 11
The wire is wound and stretched around the output shaft pulley 11a and the guide pulleys 13 and 13 '. The wire 12 is attached to a proper position of the sensor carriage 6, and therefore the sensor carriage 6 can be moved along the guide rail 7 by the sensor carriage driving motor 11 via the wire 12. Reference numeral 14 denotes a print head mounted reciprocally on a guide rail 15 arranged parallel to the guide rail 7.
Reference numeral 16 denotes a print head drive motor, which is a stepping motor or the like connected to the computer control circuit,
7 is an output shaft pulley 16a of the print head driving motor 16
And a wire wound and stretched around the guide pulleys 18 and 18 '. The wire 18 is attached to the print head 14 at a proper position, and thus the print head 14 can be moved along the guide rail 15 by the print head driving motor 16 via the wire 18.

When recording data such as analysis results, the recording pens 3, 4, 5 record the input data on the recording paper 2 as described above. In this case, the recording pens 3, 4, 5 are used.
The amount of movement of 5 is detected by the position detectors 8, 9, and 10 as the amount of displacement from one end of the recording paper 2 in the width direction, for example, as a reference point. That is, for example, when the movement amount A from the reference point corresponding to the value of the input data of the recording pen 3 is set, the recording pen 3 is moved to the position of the distance A from the reference point by the driving means and the position detection is performed. The sensor carriage 6 supporting the position detector 8 moves appropriately along the guide rail 7 so that the container 8 can detect the position of the recording pen 3. If the actual position of the recording pen 3 detected by the position detector 8 is different from the movement amount A, the computer control circuit determines the difference amount with respect to the driving means of the recording pen 3 based on the difference amount. To send the drive signal again to correct
As a result, the recording pen 3 is correctly positioned at the position of the distance A from the reference point. Since such position correction for the recording pens 3, 4, 5 must be reliably performed within the range of the effective paper width L of the recording paper 2, the position detectors 8, 9, 10
That is, the stroke of the reciprocating motion of the sensor carriage 6 is set to be larger than at least the effective paper width L.

On the other hand, the print head 14 includes a recording pen 3,
It is moved along the guide rail 15 so that a data value or other desired character or the like is printed at an appropriate position on the recording paper 2 at a predetermined timing during analog data recording by 4, 5 or 5. The movement of the print head 14 is performed by the print head driving motor 16 as described above, and the moving stroke of the reciprocating movement of the print head 14 is set to be substantially equal to the effective paper width L of the recording paper 2.

[0007]

However, the conventional recorder is provided with two drive motors, that is, the sensor carriage driving motor 11 and the print head driving motor 16, and the sensor carriage 6 and the printing are separately printed by these driving motors. Since the head 14 is driven and controlled, two drive systems for these must be constructed.
There is a problem that not only the structure of the device becomes complicated, but also the device becomes large in size, and the manufacturing cost must be increased. SUMMARY OF THE INVENTION In view of such circumstances, an object of the present invention is to provide a print head driving mechanism which can simplify the structure of the recorder and effectively downsize the recorder in this type of recorder.

[0008]

A print head drive mechanism according to the present invention is mounted on a sensor carriage equipped with a position detector for detecting the position of a recording pen, and is detachably connected to the sensor carriage to print on recording paper. The print head and the sensor carriage are arranged in the track of the sensor carriage, and when the print head is moved by the sensor carriage from the reference point of the recording paper to the substantially effective width position of the recording paper, the sensor carriage is engaged with the sensor carriage. And a cam plate capable of releasing the connection between the print head and the print head.

[0009]

According to the present invention, since the print head is driven by using the drive system of the sensor carriage, the drive system of the print head itself can be omitted. It is possible to simplify and downsize the device.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the print head driving mechanism of a recorder according to the present invention will be described below with reference to FIGS. First, the sensor carriage 6 and the print head 14 are reciprocally mounted on the guide rail 7 and the guide rail 15, respectively, as in the case of the conventional example, but the sensor carriage 6 is rotatable on its side. The roller 19 is provided. On the other hand, an engagement piece 20 having a U-shaped engagement groove 20a into which the roller 19 can be fitted is fixed to the print head 14. In this engagement piece 20, as shown in FIG. 2, one projection piece 20b on which the engagement groove 20a is to be formed and the other projection piece 20b is formed.
Although it is higher than c, in the normal state, the roller 19 is fitted in the engagement groove 20a and both are engaged with each other. Further, a cam plate 21 for receiving the roller 19 at a proper position of the effective paper width L from the reference point of the recording paper 2 along the reciprocating direction of the sensor carriage 6 is placed at a proper position on the apparatus frame (not shown). Are arranged. The cam plate 21 is provided with a cam surface 21a inclined so that the roller 19 provided on the sensor carriage 6 moving from the reference point to the other end portion of the recording paper 2 on the opposite side can ride up. When the roller 19 rides on the cam surface 21a, the sensor cart 6 rotates around the guide rail 7 (arrow B in FIG. 1) and the roller 19 and the engagement groove 20a are engaged with each other. It comes off. In the above case, the position of the sensor carriage 6 is detected by, for example, a sensor (not shown) as a position in the width direction of the recording paper 2 from the reference point, and the sensor carriage 6 is always positioned correctly. It has become.

Since the print head drive mechanism of the recorder according to the present invention is constructed as described above, when printing is performed at a desired position on the recording paper 2, the position where this printing is performed is the effective paper width of the recording paper 2. Although within the range of L, the roller 19 fits into the engaging groove 20a of the engaging piece 20 and the roller 19 and the engaging piece 2
In the normal state where 0 is engaged, a drive signal is output from the computer control circuit to the sensor cart drive motor 11. This drive signal causes the sensor carriage 6 to move to the print head 1
Move on the guide rail 7 so that 4 is brought to the position where printing should be performed. In this way, the print head 14
Can be moved to a predetermined printing position by being driven by the sensor carriage 6 through the engagement of the roller 19 and the engagement piece 20.

By the way, when the moving range of the sensor carriage 6 and the moving range of the print head 14 are different, that is, the print position is a distance of the effective paper width L from the reference point (the other end of the recording paper 2).
In such a case, and in such a case, the recording pens 3, 4, 5 or any one of them is located at the other end of the recording paper 2 and the position detector 8 of the sensor carriage 6 is
If the sensors 9 and 10 try to detect the positions of the recording pens 3, 4, and 5, the sensor cart 6 not only drives the print head 14, but also correctly detects the positions of the recording pens 3, 4, and 5. In order to do so, the sensor cart 6 is attached to the recording paper 2
It is necessary to move to a range that is equal to or larger than the effective paper width L of. That is, when the moving range of the sensor carriage 6 becomes larger than the moving range of the print head 14 as described above, first, the print head 1 is moved.
4 is driven by the sensor carriage 6 through the engagement of the roller 19 and the engagement piece 20 in the same manner as described above to be moved to a predetermined printing position. The print head 14 performs desired printing at this print position, while the cam plate 21 is disposed at this print position as described above, and when the print head 14 is brought to the print position, the sensor is provided. The roller 19 provided on the carriage 6 rides on the cam surface 21a of the cam plate 21, so that the roller 19 rides over the protruding piece 20c of the engaging piece 20 and the engaging groove 2 of the engaging piece 20.
Leave 0a. Therefore, the print head 14 is separated from the sensor carriage 6 after printing, but the sensor carriage 6 is moved further than the printing position by the sensor carriage driving motor 11 and outside the range of the effective paper width L of the recording paper 2. Go out. The sensor carriage 6 can correctly detect the position of the recording pens 3, 4, 5 located at the other end of the recording paper 2 by moving the distance of the effective paper width L or more in this way.

When the sensor carriage 6 moving to the position outside the effective paper width L of the recording paper 2 moves toward the reference point in the opposite direction to the above, first, only the sensor carriage 6 is moved. Moves in the direction of the reference point. At the distance position of the effective paper width L of the recording paper 2, the roller 19 riding on the cam plate 21 begins to descend along the cam surface 21a.
At the position where the cam plate 21 is provided, the print head 14 that has been printing there is waiting as described above, and therefore the roller 19 is in the engagement groove 20a of the engagement piece 20 provided in the print head 14. Refitting and engaging both. Laura 19
And the sensor carriage 6 which is carried out through the engagement of the engagement groove 20a.
When the print head 14 is engaged with the print head 14, the print head 14 can be driven by the sensor carriage 6 to move along the guide rails 15. In this way, the sensor cart 6
The print head 14 and the print head 14 are removably connected to each other through the engagement of the roller 19 and the engagement piece 20 provided on the sensor carriage 6 and the print carriage 14 even if the movement amounts of the sensor carriage 6 and the print head 14 are different. The print head 14 can be appropriately reciprocated along the guide rails 15 by the operation of the carriage 6.

The sensor carriage 6 and the print head 14 in the above embodiment are interconnected by an elastic member such as a coil spring, and at a proper position (for example, an engaging piece) along the guide rail 15 for the print head 14. A stopper means for restricting the movement of the print head 14 is provided at a position (distance position of the effective paper width L of the recording paper 2 from a reference point where 20 should be disposed), and normally the print head 14 is provided with a sensor via such an elastic member. The carriage 6 is driven by the movement of the carriage 6, and when the movement amount of the print head 14 becomes large and comes into contact with the stopper means, the print head 14 is held at the contact position, and the sensor carriage 6 has the elasticity. By using the elastic deformation of the member (in the case of a coil spring, the expansion deformation thereof), a larger movement amount than the print head 14 can be allowed. It can also be so. In this case, it is necessary to increase the rated output of the sensor truck driving motor 11 that is the drive source of the sensor truck 6 in response to the movement of the sensor truck 6 against the elastic force of the elastic member. There is.

[0015]

As described above, according to the present invention, the print head is driven by using the drive system of the sensor carriage by detachably connecting the sensor carriage and the print head. There are advantages that the drive system of the head can be omitted and the size of this type of device can be effectively realized.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of an embodiment of a print head driving mechanism of a recorder according to the present invention.

FIG. 2 is a partial front view showing a relationship between a roller, an engaging piece, and a cam plate according to an embodiment of a print head driving mechanism of a recorder according to the present invention.

FIG. 3 is a perspective view of a main part of a conventional print head drive mechanism.

[Explanation of symbols]

 1 Platen 2 Recording Paper 3, 4, 5 Recording Pen 6 Sensor Cart 8, 9 and 10 Position Detector 11 Sensor Cart Drive Motor 12 Wire 14 Print Head 19 Roller 20 Engagement Piece 21 Cam Plate

Claims (1)

(57) [Scope of utility model registration request] 1. A sensor carriage equipped with a position detector for detecting the position of a recording pen, a print head detachably connected to the sensor carriage for printing on recording paper, and a track of the sensor carriage. When the print head is moved by the sensor carriage from the reference point of the recording paper to a substantially effective width position of the recording paper, the sensor carriage is engaged with the sensor carriage to connect the sensor carriage and the print head. And a cam plate capable of releasing the print head.