JPH0436309Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a recording pen mounting mechanism, and more specifically, it provides a recording pen mounting mechanism that is less likely to cause blurred recording due to the recording pen flying off. It is.

(Prior Art) One type of recording device is an XY recording device that is configured to perform recording while moving a recording pen in the XY directions.

FIG. 7 is an explanatory diagram of a main part configuration showing an example of a recording pen attachment mechanism in such an XY recording apparatus. In FIG. 7, reference numeral 1 denotes a frame constituting the carriage, and one end is provided with an engaging portion 3 that is movably fitted into a carriage bar 2 provided in the Y and Y-axis directions, and the other end is provided with a protruding side. 4 is provided. Further, a pulley 5 around which a reeling line is wound for moving the frame 1 along the carriage bar 2 is rotatably attached to the upper part of the frame 1, and the other end of the pen arm 7, to which a recording pen 6 is attached, is attached to a shaft. A mounting part 9 is provided for rotatable mounting via 8 . Reference numeral 10 denotes a detent for preventing rotation of the frame 1 about the carriage bar 2, and a groove 11 into which the protruding side 4 of the frame 1 fits is formed. This detent 10 is arranged parallel to the carriage bar 2. Note that the frame 1 and the pen arm 7 are made of, for example, die-cast members, and the detent 10 is made of, for example, a deformed material. 12 is a table on which recording paper is placed. Reference numeral 13 denotes a drive member which rotates the pen arm 7 clockwise by selectively rotating clockwise about the shaft 14, thereby raising the recording pen 6.

In this configuration, during recording, the driving member 13 is rotated counterclockwise as shown in FIG. 7, and the recording pen 6 is in contact with the recording paper. On the other hand, when not recording, the driving member 13 is rotated clockwise and the recording pen 6 is separated from the recording paper.

(Problem to be solved by the invention) However, according to such a conventional configuration, when the carriage is accelerated in the direction of X ₁ or decelerated in the direction of X ₂ , the recording pen 6 does not fly away. recording may be blurred. This is because if the center of gravity P of the recording pen 6 and pen arm 7 is higher than the rotation axis 8, the pen arm 7 will rotate clockwise about this axis 8, causing the recording pen 6 to lift off the recording paper. by. Rotational moment M at this time
If the height difference between the center of gravity P and the axis 8 is l, the mass is W, and the acceleration is G, then M=l・W・G. Furthermore, even in normal recording conditions, frictional force acts on the tip of the recording pen 6, so if the rigidity of the pen arm 7 is weak, the pen arm 7 will bend as shown by the broken line in FIG. At this moment, the pen arm 7 rotates clockwise about the shaft 8, which may cause the recording pen 6 to lift off the recording paper, resulting in what is called a stick slip.

The present invention solves these drawbacks, and its purpose is to provide a recording pen mounting system that prevents the recording pen from flying off during recording and allows high-quality recording results without blurred recording. The object of the present invention is to provide a recording pen mounting mechanism whose parts have high rigidity.

(Means for Solving the Problems) The present invention that achieves the above object is movably fitted into a carrier bar, and has upper and lower sides formed in a U-shape on both sides of one end. and a shaft is attached between each lower side, and the other end is formed with a protruding side that fits into a groove formed in a rotation prevention member arranged parallel to the carriage bar to prevent rotation about the carriage bar. It is formed almost in a U-shape, with an elongated hole at one end for inserting one shaft of the frame, a bearing at the other end for inserting the other shaft of the frame, and a hole in the center. The recording pen is removably attached via a leaf spring so that the pen tip and the axis of the frame are aligned almost on the same line, and the pen holder is fitted onto one axis of the frame and biases the pen holder toward the bottom side of the frame. It is characterized by being composed of a coil spring.

(Example) Hereinafter, it will be explained in detail using the drawings.

FIG. 1 is an explanatory diagram showing the main parts of an embodiment of the present invention, and the same parts as in FIG. 7 are given the same reference numerals. In FIG. 1, reference numeral 15 denotes a frame movably fitted to the carrier bar 2;
A pen holder 6 is attached to the frame 15 so as to be movable substantially perpendicularly to the frame 15. Upper and lower sides are provided on both sides of one end of the frame 15, respectively, and shafts 17 and 18 for attaching the pen holder 16 are provided between these upper and lower sides. Further, a protruding side 19 is formed at the other end of the frame 15 as shown in FIG. It is fitted into a groove 21 formed in a detent 20 for preventing rotation. Note that the frame 15 is made of, for example, a die-cast member, and the detent 20 is made of, for example, a deformed material. The pen holder 16 has a shaft 1 at one end.
7, the other end is movably attached to the shaft 18, and the central part has a recording pen 6.
is formed into a substantially U-shape so that it can be detachably attached via a plate spring 22. One end of the pen holder 16 is provided with an elongated hole 23 for inserting a shaft 17 as shown in FIG. 3, and a coil spring 24 is fitted between it and the upper side of the frame 15 as shown in FIG. and is attached to the shaft 17. This elongated hole 23 serves as a rotation stopper and a sliding bearing. On the other hand, a linear bearing 25 for inserting the shaft 18 is provided at the other end of the pen holder 16. Further, an L-shaped bent side 26 is integrated into the upper part of the central portion of the pen holder 16 so as to protrude rearward from the upper surface of the frame 15. As a result, the pen holder 16 is attached to the frame 1.
The recording pen 6 attached to the pen holder 16 is also displaced approximately perpendicularly to the recording paper along the shafts 17 and 18 provided in the pen holder 16. Become.
Here, the pen holder 16 is attached to the frame 15 so that the nib of the recording pen 6 and the shafts 17, 18 are located substantially on the same line on the recording paper, as shown in FIG. Reference numeral 27 denotes a mounting portion to which one end of the carriage bar 2 is fixed, and is movably fitted into the guide shaft 28. Reference numeral 29 denotes a driving member for driving the pen holder 16 up and down, and is arranged so as to be located between the upper part of the carriage bar 2 and the lower part of the bent side 26 of the pen holder 16. The guide shaft 2 at the end of this drive member 29
One end along line 8 is rotatably attached to the end of a mounting piece 30 fixed to the mounting portion 27, and the other end is rotatably attached to one end of a link 34 composed of levers 31 to 33. There is. The other end of this link 34 is rotatably attached to the end of a mounting piece 35 whose one end is fixed to the mounting portion 27. Furthermore, a roller 36 is rotatably attached to the lever 32 that constitutes the link 34.
Reference numeral 37 denotes a driving member for displacing the link 34 via the roller 36, and is arranged parallel to the guide shaft 28 along the moving direction of the carriage bar 2, that is, the axial direction of the guide shaft 28. This driving member 37 is formed into a predetermined shape by bending both ends and one side of a metal plate into an L shape in the same direction, and a recording device (not shown) is located near the bent sides of both ends. A solenoid 40 is provided with shafts 38 and 39 for being rotatably attached to the main body, and the driving member 37 is rotationally displaced clockwise by selectively energizing a position away from the bent side of one end face. are connected,
A spring 41 is provided on the bent side to return the drive member 37 to its initial position when the solenoid 40 is de-energized. 42,4
Reference numeral 3 denotes a stopper that restricts the rotation range of the drive member 37, and is arranged vertically so as to sandwich the drive member 37.

The operation of the device configured in this way will be explained.

FIG. 1 shows a state in which the solenoid 40 is not energized. In this state, the drive member 37 is rotated counterclockwise by the spring 41 and the stopper 42
is in contact with Further, the driving member 29 also has a roller 36.
and a bent side 26 which is rotated counterclockwise via a link 34 and integrated into the pen holder 16.
is lifted from the frame 15 by a driving member 29 against the coil spring 24, and the recording pen 6
will be lifted from the recording paper. On the other hand, when the solenoid 40 is energized, the drive member 3
7 rotates clockwise around shafts 38 and 39 against a spring 41, and rotates around a roller 36 and a link 34.
moves down in the vertical direction, and the driving member 29 and the mounting member 31 rotate clockwise about the center. As a result, the engagement between the bent side 26 and the driving member 29 is released, and the pen holder 16 is pressed toward the recording paper by the pressing force of the coil spring 24. When the solenoid 40 is deenergized from the pen-down state in which the recording pen 6 is in contact with the recording paper, the recording pen 6 returns to the initial state in which it is up as shown in FIG.

Here, the pen holder 16 is pressed by a coil spring 24 so that it can be displaced in a direction substantially perpendicular to the recording paper, and the pen holder 16 is pressed between the pen tip of the recording pen 6 and the guide shaft 1.
7 and 18 are attached to the frame 15 so that they are almost aligned on the same line on the recording paper. The recording pen 6 does not lift up as shown in the figure, and a stable recording operation without blurred recording can be realized. Also,
According to such a configuration, since a conventional pen arm is not used, the recording pen 6 and the frame 15 are
The rigidity between the two ends is extremely high, and problems such as stick slip due to low rigidity do not occur. In addition, the link 34 and the drive member 37
are engaged via rotatable rollers 36, so that the movement of the mounting portion 27 along the axial direction of the guide shaft 28 is not hindered regardless of whether the recording pen 6 is up or down, and the carriage bar 2 is moved smoothly. The recording pen 6 can be moved along the axial direction of the guide shaft 28, and the recording pen 6 can be raised or lowered at any position. Furthermore, since the solenoid 40 is removed from the movable part, the movable part can be weighed and excellent high-speed recording characteristics can be obtained.

According to the configuration shown in FIG. 1, when the recording pen 6 is driven up and down, the drive member 37 collides with the stoppers 42 and 43, which causes lateral vibrations and generates considerable noise. There is. This noise increases as the rigidity of the drive member 37 decreases.

However, as shown in FIG. 5, for example, a parallel link 44 attached to the recording apparatus main body so as to be displaced along the moving direction of the carrier bar 2, instead of the drive member 37 used in FIG. This can be reduced by increasing rigidity and reducing vibration energy. In FIG. 5, the parallel link 44 consists of two levers 45, 46, one end of which is rotatably attached to the main body of the recording device (not shown), and a lever rotatably attached to the other end of these levers 45, 46. It consists of 47. The roller 36 is in contact with the lever 47. The connecting shaft 48 of the levers 46 and 47 is engaged with a groove provided at one end of a lever 49 for expanding the stroke, and a solenoid 50 is attached to the other end of this lever 49. In addition, lever 4
9 is the distance l ₁ from the fulcrum to the connection point with the solenoid 50 and the distance from the starting point to the connection point with the connection shaft 48
The shaft 51 can be rotated at a position where l ₂ and 2 are in the desired ratio.
The spring 5 for return is attached to the main body of the recording device via the connecting point between the shaft 51 and the connecting shaft 48.
1 is provided. Further, a stopper 5 is provided on the main body of the recording apparatus so as to face one end of the lever 47.
3 is provided.

Sixth section regarding the operation of the device configured in this way.
This will be explained using figures.

First, when the solenoid 50 is not energized,
The parallel link 44 is connected to the lever 44 as shown in the actual battle.
the spring 51 so that the lever 34 is substantially orthogonal to the lever
The lever 47 is rotated counterclockwise by the lever 47.
is in contact with the stopper 53. In this state, the driving member 29 is also rotated counterclockwise via the roller 46 and the link 44 as in FIG.
9, the recording pen 6 is lifted from the frame 15 against the coil spring 24, and the recording pen 6 is lifted from the recording paper. On the other hand, when the solenoid 50 is energized, the lever 49 rotates clockwise about the shaft 51, and the stroke of the solenoid 50 is transmitted to the parallel link 44 while being magnified by l ₁ /l _twice . The parallel link 44 rotates clockwise against the spring 51, and the levers 44-46 are displaced to the positions shown by broken lines. This results in
The engagement state between the bent side 26 and the driving member 29 is released, and the pen holder 16 is pressed toward the recording paper side by the pressing force of the coil spring 24. and. When the solenoid 50 is deenergized from the pen-down state in which the recording pen 6 is in contact with the recording paper, the parallel link 44 returns to the initial state shown by the solid line in FIG. This will return to the initial pen-up state as shown in the figure. At this time, the lever 47 collides with the stopper 53, but the lever 47
Since the rigidity in the longitudinal direction is extremely high, noise due to vibration as shown in FIG. 1 is not generated, and a recording pen up-down mechanism with excellent quietness can be obtained. Note that the solenoid for displacing the parallel link 44 is not limited to a linear stroke type as shown in FIG. 5, but a rotary type may be used. Further, the structure of the link that converts the displacement of the parallel link 44 into a vertical displacement and transmits it to the recording pen 6 is not limited to the structure shown in FIG. 1, and various types of links can be used.

In the above embodiment, the recording pen is attached to the pen holder so that it is almost perpendicular to the recording paper, but it may also be attached at an angle to the recording paper. good. By attaching it diagonally, it is possible to reduce the phase difference between each pen in the case of a multi-pen type.

Further, the bearing for attaching the pen holder to the guide shaft is not limited to the one in the embodiment, and bearings with various structures may be used.

Further, the recording pen mounting groove configured in this manner is effective not only for an XY recording device but also as a recording pen mounting mechanism for various recording devices.

(Effects of the Invention) As explained above, according to the present invention, it is possible to prevent the recording pen from flying away during recording, and to obtain high-quality recording results without blurred recording.
It is possible to realize a recording pen mounting mechanism in which the recording pen mounting portion has high rigidity, which has a great practical effect.

[Brief explanation of drawings]

Fig. 1 is a configuration explanatory diagram showing the main parts of an embodiment of the present invention, Fig. 2 is a simplified sectional view of the side surface of the carriage part in Fig. 1, Fig. 3 is a sectional view of the main parts of the pen holder, and Fig. 4 is a sectional view of the main parts of the pen holder. The figures are a simplified sectional view of the front of the carriage part in Fig. 1, Fig. 5 is a configuration explanatory diagram showing another specific example of the up-down mechanism of the recording pen, and Fig. 6
5 is an explanatory diagram of the operation of FIG. 5, FIG. 7 is an explanatory diagram of the configuration showing an example of a conventional pen attachment mechanism, and FIG. 8 is an explanatory diagram of the operation of FIG. 7. 2...Carriage bar, 6...Recording pen, 12
...Chart table, 15...Frame, 16
...Pen holder, 17, 18...Guide shaft.

Claims (1)

[Claims for Utility Model Registration] It is movably fitted into a carrier bar, and the upper and lower sides are formed in a U-shape on both sides of one end, and a shaft is attached between the upper and lower sides, respectively, and a shaft is attached to the other end. The frame has protruding sides that fit into the grooves formed in the anti-rotation member arranged parallel to the carriage bar to prevent rotation about the carriage bar, and the frame is formed in a substantially U-shape, with one side of the frame at one end. An elongated hole is provided for inserting the shaft of the pen, a bearing is provided at the other end for inserting the other shaft of the frame, and the center portion is provided so that the pen tip and the shaft of the frame are almost on the same line. A recording pen comprising: a pen holder to which the recording pen is detachably attached via a leaf spring; and a coil spring fitted to one shaft of the frame to bias the pen holder toward the lower side of the frame. Mounting mechanism.