JPH0516500Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a recording pen up-down device for a pen recorder.

(Prior art) A pen recorder is a pen recorder that records information on a recording paper by moving a recording pen in a direction perpendicular to the running direction of the recording paper in response to changes in the magnitude of a measurement signal. It is configured to continuously record changes in the magnitude of the measurement signal.

In such a pen recorder, when replacing the recording paper or recording pen, make sure to check the tip of the recording pen to prevent ink from getting on the platen or excess ink on the recording paper. It is necessary to separate it from the recording paper.

Further, even when it is only necessary to check the displacement of the recording pen and no recording is necessary, the tip of the recording pen must be kept away from the recording paper at the selected area.

Therefore, in conventional pen recorders, for example, a pen up bar for selectively lifting the pen arm is provided at the bottom of the pen arm that connects the recording pen and the carriage, and this pen up bar is selectively driven and displaced in the vertical direction using a solenoid. ing.

(Problem to be solved by the invention) However, with this configuration, a pen up bar must be provided separately outside the guide shaft that regulates the direction of movement of the carriage and prevents rotation of the carriage, which reduces the number of parts. The disadvantage is that the configuration becomes more complex as the number of devices increases.

In particular, in the case of a multi-pen recorder in which a plurality of recording pens are arranged along the feeding direction of recording paper, the number of parts increases in proportion to the number of recording pens, which is undesirable.

The present invention has focused on these problems, and its purpose is to provide a recording pen up-down device that can raise and lower recording pens with a simple configuration and is particularly suitable for multi-pen recorders. It is in.

(Means for Solving the Problems) The present invention to solve these problems consists of a guide shaft with a non-circular cross-sectional shape, a rotation drive mechanism that selectively drives the guide shaft to rotate, and a side surface of the guide shaft. An insertion hole for loosely fitting the guide shaft is formed, and an opening for attaching the end of the recording pen is formed in a part of the plane, and a latch shaft is attached to this opening parallel to the guide shaft. a pen holder, a mounting part is formed to fit into the opening of the pen holder, and an engaging part is formed on the back side of the mounting part so as to be rotatably fitted to a latch shaft attached to the pen holder. and a recording pen formed with a positioning member so as to face a lower surface of the guide shaft when attached to the pen holder, and the positioning member of the recording pen is selected in conjunction with rotation of the guide shaft. The recording pen is characterized in that it is configured to move up and down when pressed.

(Example) Hereinafter, an example of the present invention will be described in detail using the drawings.

FIG. 1 is a configuration explanatory diagram showing an embodiment of the present invention. In Fig. 1, 1 is a first guide shaft with a circular cross-sectional shape, and 2 is a second guide shaft made of a non-circular member with a gourd-shaped cross-sectional shape in which a large diameter part and a small diameter part are connected. be. A carriage 3 is movably fitted to the first guide shaft 1, and a pen holder 4 is movably fitted to the second guide shaft 2. Note that the second guide shaft 2 is selectively driven to rotate in the reciprocating direction by a rotation mechanism (not shown). Reference numeral 5 designates a timing belt for moving the carriage 3 along the first guide shaft 1, and is reciprocated by a stepping motor (not shown). 6 is a connecting member that connects the carriage 3 and the pen holder 4. 7 is a recording pen that is detachably attached to the pen holder 4.

In the pen holder 4, an insertion hole 22 for loosely fitting the guide shaft 2 is formed on both sides. An opening 8 for attaching the end of the recording pen 7 is formed in a part of the plane, and a latch shaft 9 is attached to the opening 8 parallel to the guide shaft 2. Incidentally, taper flanges for regulating the attachment position of the recording pen 7 are integrated with both ends of the latch shaft 9, and are supported by pivot bearings so as to rotate slightly. Further, a notch 10 into which a portion of the recording pen 7 is fitted is formed in a portion of the plane.

2 is a front view of the recording pen 7, FIG. 3 is a side view of FIG. 2, and FIG. 4 is a partial sectional view taken along line A--A in FIG. 2. As shown in these figures, the recording pen 7 includes an ink case 12 which is formed in a flat shape and has one end curved, and in which an ink-impregnated batting 11 is housed, and a curved end portion of the ink case 12. A pen tip 13 attached to the pen holder 4 so as to communicate with the inside thereof, and an opening 8 of the pen holder 4.
A mounting part 14 is integrated into the other end of the ink case 12 so as to fit into the ink case 12, and a mounting part 14 is rotatably attached to a part of the surface of the mounting part 14 via a shaft 15, and one end is a part of the pen holder 4. The other end is a pen pressure spring 16 so as to press the notch 10 formed in the
a pen pressure generating plate 17 energized by the pen holder 4; an engaging portion 18 formed on the back surface of the mounting portion 14 so as to be detachably and rotatably fitted to the latch shaft 9 attached to the pen holder 4; 4, and a positioning member 19 formed on the back surface of the mounting portion 14 so as to face the bottom surface of the guide shaft 2 when attached to the guide shaft 2.

In such a configuration, when attaching the recording pen 7 to the pen holder 4, it is necessary to attach the recording pen 7 to the pen holder 4.
After fitting the mounting part 14 into the opening 8 of the pen holder 4 and inserting the positioning member 19 formed on the back surface of the mounting part 14 so as to face the lower surface of the guide shaft 2, the engaging part 18 is inserted into the latch shaft. Fit into 9.

The up-down operation of the recording pen in the apparatus configured as described above will be explained.

FIG. 5 is an explanatory diagram of the operation when the recording pen 7 is attached to the pen holder 4, where the solid line indicates the recordable state in which the recording pen 7 is down, and the two-dot chain line indicates the recording state in which the recording pen 7 is up. Indicates a prohibited state. In FIG. 5, 20 is a platen, and 21 is a recording paper wound around a part of the platen 20. In FIG.

In the recordable state, the positioning member 19 is mechanically free with respect to the guide shaft 2. The recording pen 7 rotates around the latch shaft 9 due to its own weight and the pen pressure generated between the notch 10 of the pen holder 4 and the pen pressure generating plate 17 biased by the pen pressure spring 16. The pen tip 13 is brought into a pen-down state in which it stably contacts the recording paper 21 on the platen 20 with a constant pressing force.

In the recording prohibited state, the guide shaft 2 is rotated in the direction of arrow A, and the end of the positioning member 19 is pressed by the small diameter portion of the guide shaft 2. The recording pen 7 is rotated clockwise about the latch shaft 9 against the pressing force toward the platen 20 due to its own weight and pen pressure. As a result, the pen tip 13 is placed in a pen-up state away from the recording paper 21.

With this configuration, the conventional pen up bar is not required, the number of parts can be reduced, and the configuration can be simplified.

In the above embodiment, the guide shaft 2 has a gourd-shaped cross section, but the guide shaft 2 may have a substantially non-circular cross-sectional shape, and is not limited to the gourd shape.

FIG. 6 is a configuration explanatory diagram showing another embodiment of the present invention, and shows an example in which an eight-pen type multi-pen recorder is constructed using eight recording pen mechanisms shown in FIG. 1. In FIG. 6, 23 connects sprocket wheels 25 and 2 via a timing belt 24.
This is a platen rotation drive mechanism that rotates the platen 6.
27 is a first storage section for storing unrecorded recording paper;
8 is a second storage section for storing recorded recording paper, and these are connected to sprocket wheels 25 and 26.
It is integrated as a chart cassette with a recording paper feeding mechanism including the following. The thus integrated chart cassette is supported between side plates (not shown) so that it can be taken out while rotating about point _P1 . A wire dot head 29 performs digital printing, and is arranged so as to be movable between the recordable ranges of the recording paper 21 in parallel to the platen. 30 is a spacer having a flat surface disposed between the sprocket wheels 25 and 26, and 31 is a recording paper pressing member, which is attached to the chart cassette.

The second guide shaft 2 of each recording pen mechanism is a platen 2.
The first guide shaft ₁ is a storage space for a stepping motor (not shown) for driving each recording pen mechanism. It is arranged at an appropriate position that is not located in a concentric flame centering on the rotation axis of the platen 20 in consideration of the above.

By configuring in this way, all of the parts constituting each recording pen except for the connecting member 6 have the same shape to ensure compatibility, and an optimal arrangement relationship can be achieved simply by changing the shape of the connecting member 6. are doing.

FIG. 7 is a structural explanatory diagram showing one embodiment of the pen up-down mechanism in such a multi-pen recorder, and only one pen system is shown. 7th
In the figure, 32 is a fan-shaped platen 20.
The cam is rotatably mounted coaxially with the rotation axis P ₂ of the cam. On the outer periphery of the cam 32, a plurality of notches 33 are formed at equal intervals so as to correspond to the arrangement position of the second guide shaft 2, and a protrusion 34 having a height h and having one surface tapered. There is. cam 3
A protrusion 35 for manual operation is integrated into one end of 2. A first opening 36 provided with a threaded groove and a second opening 37 for regulating the rotational position are formed on the side surface of the cam 32. A gear 38 meshes with a threaded groove provided in the first opening 36, and is driven to rotate in a reciprocating direction by a stepping motor 39. 40 is a stopper pin fitted into the second opening 37. 41 is a lever whose one end is fixed to the end of the second guide shaft 2;
The other end is formed into an arc shape and is fitted into the groove 33 of the cam 32.

In such a configuration, in the recordable state, the end of the lever 41 is located in the groove 33 of the cam 32, and the second guide shaft 2 is rotated in the direction of arrow B, and the recording pen 7 is positioned. Member 19 is the fifth
It is mechanically free with respect to the guide shaft 2, similar to the state shown by the solid line in the figure. That is, the recording pen 7 is in a pen-down state.

On the other hand, by rotating the cam 32 counterclockwise, the end of the lever 41 slides along the tapered surface of the protrusion 34, thereby rotationally driving the guide shaft 2 in the direction of arrow A. As a result, the guide shaft 2
The small diameter portion presses the end of the positioning member 19 in the same manner as shown by the two-dot chain line in FIG. That is, the recording pen 7 is in the pen-up state. In addition,
The maximum value of the pen up amount is at the position where the lever 41 reaches the top surface of the protrusion 34 of the cam 32, that is, when the protrusion 34
It is determined by the height h.

By rotating the cam 32 in this way,
All recording pens can be raised and lowered at the same time. The rotation of the cam 32 can be electrically driven by the stepping motor 39 as described above, or can be driven manually. Here, when the stepping motor 39 is used for rotational driving, the time required for pen down can be lengthened by reducing the drive pulse frequency, and the pen will be brought down softly, reducing the impact when the pen is brought down. can. As a result, crushing of the pen tip can be reduced, and noise caused by impact can be reduced.

FIG. 8 is a configuration explanatory diagram showing another embodiment of the pen up-down mechanism in a multi-pen recorder, and shows an example in which the motor 39 as shown in FIG. 7 is not used, and the same parts as in FIG. 7 are shown. are given the same symbol. In the figure, reference numeral 42 denotes a latch lever that is elastically integrated into a part of the cam 32, and has a claw 45 at the end that is removably fitted into a protrusion 44 formed on the side plate 43.
is formed. 46 is a stopper pin that restricts the rotation range of the cam 32.

In such a configuration, in the recordable state, the end of the lever 41 is located in the groove 33 of the cam 32, as shown by the solid line, and the pen is in the pen-down state.

On the other hand, by pulling out the protrusion 35 of the cam 32 and rotating the cam 32 counterclockwise as shown by the two-dot chain line, the end of the lever 41 slides along the tapered surface of the protrusion 34. , the pen is in an up state. In this state, the claw 45 of the latch lever 42 is attached to the protrusion 45 formed on the side plate 43.
The pen-up state is maintained by fitting and locking the cam 32 to prevent clockwise rotation of the cam 32. To change the pen-up state to the pen-down state, push in the protrusion 35 of the cam 32 so that the protrusion 44 and the claw 4
5 and rotate until the cam 32 hits the stopper pin 40. In this process, the lever 41 slides on the tapered surface of the protrusion 34, causing the pen to soften down.

By operating the protrusion 35 and rotating the cam 32 in this way, all the recording pens can be raised at the same time, as in FIG. 7.

(Effects of the Invention) As described above, according to the present invention, a recording pen up-down device capable of raising and lowering a recording pen can be realized with a simple configuration, and the practical effects are great.

[Brief explanation of the drawing]

FIG. 1 is a configuration explanatory diagram showing an embodiment of the present invention;
Fig. 2 is a front view of the recording pen 7, Fig. 3 is a side view of Fig. 2, Fig. 4 is a partial sectional view taken along line A-A in Fig. 2, and Fig. 5 shows the recording pen in the pen holder. FIG. 6 is an explanatory diagram showing another embodiment of the present invention; FIG. 7 is an explanatory diagram showing an embodiment of the pen up-down mechanism used in FIG. 6; FIG. FIG. 7 is a configuration explanatory diagram showing another embodiment of the pen up-down mechanism used in FIG. 6; 1...First guide shaft, 2...Second guide shaft, 3
...carriage, 4 ... pen holder, 5 ... timing belt, 6 ... connection member, 7 ... recording pen, 22 ... guide shaft insertion hole.

Claims (1)

[Claims for Utility Model Registration] A guide shaft with a non-circular cross-sectional shape, a rotation drive mechanism that selectively drives the guide shaft to rotate, an insertion hole formed on the side surface for loosely fitting the guide shaft, An opening for attaching the end of the recording pen is formed in a part of the plane, and the opening includes a pen holder having a latch shaft attached parallel to the guide shaft, and a mounting portion fitted into the opening of the pen holder. An engaging part is formed on the back surface of the attachment part to be rotatably engaged with the latch shaft attached to the pen holder, and the latch shaft is attached to the pen holder. a recording pen having a positioning member formed so as to face a lower surface thereof, the recording pen being moved up and down by selectively pressing the positioning member of the recording pen in conjunction with the rotation of the guide shaft; A recording pen up-down device characterized by comprising: