JP2508426Y2 - Printing mechanism - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing mechanism, and more particularly to improvement of a printing mechanism mounted on a pen recorder.

[0002]

2. Description of the Related Art Pen recorders are widely used for analog recording of various measurement signals because they can continuously record the magnitude of a measurement signal. By the way, the former pen recorder is provided only with a pen mechanism that performs analog recording of the magnitude of the measurement signal on the recording paper while displacing in the direction orthogonal to the recording paper feed direction according to the magnitude of the measurement signal. And the recording paper feed speed, date, time, alarm information,
A printing mechanism for recording a predetermined printing pattern related to various analog recordings such as a time marker has not been provided.

The applicant has commercialized a pen recorder incorporating a printing mechanism as described in Japanese Patent Application No. 59-220118 to solve such conventional inconvenience, and has been well received. Is gaining.

FIG. 4 is a diagram showing the construction of such a conventional pen recorder, and FIG. 5 is a diagram showing the construction of the printing mechanism used in FIG. In the figure, an analog recording mechanism AR having _three pens P _{1 to} P ₃ is stacked and arranged on the platen 1 along the feed direction of the recording paper 2 wound around a cylindrical platen 1. A predetermined print pattern is provided below the analog recording mechanism AR on the recording paper 2.
Printing mechanism CP is arranged with a pen P ₀ to be recorded on. 3 is a chart cassette, which is unrecorded recording paper 2
The portion 3a for storing a and the portion 3b for storing the recorded recording paper 2b are integrated, and the printing mechanism CP
It is located at the bottom of. Reference numeral 4 denotes a pressing member that guides the recording paper 2b sent out from the platen 1 to a predetermined storage portion 3b, and is disposed so that an end thereof faces the platen 1 with a predetermined gap. Reference numeral 5 denotes a display unit, which is arranged in front of each of the pens P _{1 to} P ₃ along the width direction of the recording paper 2. 6 is a case and 7 is a door.
Reference numeral 8 denotes a carriage to which a pen arm 9 is rotatably mounted via a shaft 10, which is movably mounted on a main shaft 11 and a slave shaft 12. Both ends of the main shaft 11 and the slave shaft 12 are fixed to side plates 13 and 14, respectively, and are kept parallel. A tooth 17 is formed at one end of the side plate 13 so as to mesh with a gear 16 attached to an output shaft of the motor 15, and rotates around the main shaft 11 in accordance with the rotation of the motor 15. Will be. 18 is a drive plate for moving the pen arm 9 in the vertical direction,
It is rotatably attached to a side plate (not shown) of the main body. A plunger 21 of a solenoid 20 is connected to the drive plate 18 via a link 19 to apply a rotational drive force. 22 is a reel thread for moving the carriage 8, which is a drive pulley rotated by a motor 23.
It is wound around the reel 24 and wound between the driven pulleys 25 and 26, and is locked to the carriage 8.

With this configuration, the printing operation can be performed without feeding back the recording paper in the reverse direction, and the continuity of analog recording is not impaired. Here, when incorporating such a conventional printing mechanism into a pen recorder, the width of the recording paper 2 (for example, 100 mm and 180 mm) is required.
), The lengths of the main shaft 11, the slave shaft 12, and the drive plate 18 are set. That is, as the width of the recording paper 2 becomes wider, the lengths of the main shaft 11, the slave shaft 12, and the drive plate 18 also become longer.

[0006]

However, according to such a configuration, the printing mechanism must be individually designed according to the width of the recording paper to be used even though the same mechanism is used. The printing mechanism cannot be shared between different recorders. Further, if the length of the drive plate 18 for moving the pen arm 9 in the vertical direction becomes long, the drive plate 18 is likely to be bent or warped, and the amount of pen up is changed depending on the recording position of the pen to stabilize. There is also a problem that the pen-up operation cannot be obtained.

The present invention focuses on such a problem, and an object thereof is to provide a printing mechanism which can obtain a stable pen-up operation by a common mechanism regardless of the width of recording paper. It is in.

[0008]

DISCLOSURE OF THE INVENTION The present invention which solves such a problem is provided with a main shaft provided in a direction orthogonal to the recording paper feeding direction, a carriage moving along the main shaft, and mounted on the carriage. And a carriage moving mechanism that has a rotating body that rotates in a state of being in contact with the main shaft, and that is mounted on the carriage, a carriage moving mechanism that moves the carriage itself in a direction orthogonal to the feeding direction of the recording paper according to the rotation of the rotating body, A slide mechanism that moves back and forth along the recording paper feed direction, a pen holder that is rotatably attached to the slide mechanism so that the pen moves up and down with respect to the recording paper, and a carriage that is mounted on the recording paper. And a pen displacement mechanism for selectively moving up and down with respect to.

[0009]

In the present invention, the carriage includes a carriage moving mechanism for moving the carriage itself in the X direction orthogonal to the recording paper feeding direction, and a slide mechanism for moving the pen in the front-back Y direction along the recording paper feeding direction. , And a pen displacement mechanism for selectively moving the pen up and down in the Z direction with respect to the recording paper. For printing, the carriage moving mechanism moves the carriage according to the X-direction printing data, the slide mechanism moves the pen holder according to the Y-direction printing data, and the pen displacement mechanism moves the pen according to the Z-direction printing data. Up and down. This allows
It is possible to share a carriage having a printing mechanism of the same shape among recorders having different recording paper widths. When printing, the printing mechanism is not affected by the width of the recording paper, and stable printing operation can be obtained.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention, and the same parts as those in FIG. In the figure, 31 is a main shaft provided in a direction orthogonal to the feeding direction A of the recording paper 2, and a rack tooth groove 32 is formed at a constant pitch along a longitudinal direction on a part of the outer circumference. 33
Is a guide shaft and is arranged parallel to the main shaft 31. Three
Reference numeral 4 denotes a carriage, and these main shaft 31 and guide shaft 3
The main shaft 31 and the guide shaft 33 are engaged with the main shaft 31 so as to move along the line 3. Reference numeral 35 denotes an X-direction drive motor that moves the carriage 34 in the X direction orthogonal to the feeding direction A of the recording paper 2, and is mounted on the carriage 34. X
The rotation of the directional drive motor 35 is transmitted to the gear 36 through the plurality of gears. The gear 36 is meshed with the rack tooth groove 32 of the main shaft 31, and functions as a rotating body that moves the carriage 34 itself in the X direction by rotating while being in contact with the main shaft 31.

37 is a front and rear Y along the feeding direction of the recording paper 2.
It is a sub-carriage that moves in the direction. The sub-carriage 37 constitutes a slide mechanism and is driven by a Y-direction drive motor 38. FIG. 2 is an explanatory diagram of a configuration of a main part of the slide mechanism. The sub-carriage 37 is formed in a rectangular shape, and shaft holes 40 and 41 for rotatably supporting the pen arm 39 are provided on both sides of one end so as to be positioned on the same line along the X direction. Two guide holes 4 are provided on both sides of the end along the Y direction orthogonal to the shaft holes 40 and 41.
2, 43 are provided in parallel. The sub-carriage 37 has shafts 44, 4 in the guide holes 42, 43, respectively.
5 (45 is not shown) is slidably engaged with the back surface of the carriage 34 along the Y direction. A gear 46 is attached to the output shaft of the Y-direction drive motor 38, and the gear 46 is meshed with a rack tooth groove 47 provided in the central portion of the sub-carriage 37 along the Y direction. As a result, the sub-carriage 37 and the pen arm 39 reciprocate along the Y direction of the carriage 34 as the Y-direction drive motor 38 rotates.

Reference numeral 48 is a pen arm drive motor, which rotates the gear 49 to move the pen arm 39 into a shaft hole 50.
Is used as the fulcrum of rotation to drive the rotation. The gear 49 is screwed to the shaft 51, and the shaft 52 moves up and down with respect to the gear 49 according to the rotation direction of the gear 49. A disc 52 is attached to the end of the shaft 51. The disk 52 faces a convex portion 53 integrated with one end of the pen arm 39. Here, the initial position of the pen arm 39 is set by the spring 54 in a pen-down state in which, for example, printing is possible. When the shaft 51 descends from the initial position, the disc 52 has the convex portion 5
3 is pushed down to rotate the pen arm 39 in the counterclockwise direction to enter the pen-up state for waiting for printing. In such a configuration, the distance between the shaft hole 50 and the convex portion 53 is constant regardless of the position of the sliding movement range of the sub-carriage 37 in the Y direction, and the disk 52 is always in contact with the top surface of the convex portion 53. Therefore, the up / down amount of the pen is uniquely determined by the movement amount of the shaft 51.

[0013]

As described above, according to the present invention,
Since the X-direction drive source, the Y-direction drive source, and the pen-up / down mechanism drive source are mounted on a common carriage to form a unit, the printing mechanism can be shared regardless of the width of the recording paper. Stable printing operation can be obtained. In addition, the cost can be reduced by improving the ease of assembly, simplifying the structure, and reducing the number of parts, and can be diverted to other devices other than the recorder as needed, which is extremely useful in practice. .

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a structural explanatory view of a main part of the slide mechanism in FIG.

FIG. 3 is a structural explanatory view of a main part of the pen up / down mechanism in FIG.

FIG. 4 is a structural explanatory view showing an example of a conventional pen recorder.

5 is an explanatory diagram of a configuration of a printing mechanism used in FIG.

[Explanation of symbols]

 31 main shaft 32, 47 rack tooth groove 33 guide shaft 34 carriage 35 X-direction drive motor 36, 46, 49 gear 37 sub-carriage 38 Y-direction drive motor 39 pen arm 40, 41 shaft hole 42, 43 guide hole 44, 45 Shaft 48 Pen up / down drive motor 50 Shaft hole 51 Shaft 52 Disk 53 Convex portion 54 Spring

Claims (1)

(57) [Scope of utility model registration request] 1. A main shaft provided in a direction orthogonal to a recording paper feed direction, a carriage moving along the main shaft, and a rotating body mounted on the carriage and rotating in a state of being in contact with the main shaft. A carriage moving mechanism that moves the carriage itself in a direction orthogonal to the recording paper feed direction in response to the rotation of the rotating body, and a slide mechanism that is mounted on the carriage and moves back and forth along the recording paper feed direction. A pen arm rotatably attached to the slide mechanism so that the pen moves up and down with respect to the recording paper; and a pen displacement mechanism that is mounted on the carriage and selectively moves the pen up and down with respect to the recording paper. A printing mechanism characterized by being configured with.