JPH0342600B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an X-Y plotter, which is one of data output devices for plotting figures, graphs, etc. on paper.

[Conventional technology]

3 and 4 are diagrams for explaining a conventional X-Y plotter, with FIG. 3 being an external perspective view and FIG. 4 being a perspective view showing the internal mechanism. This device has an external appearance as shown in Fig. 3, and its internal mechanism is as shown in Fig. 4, which consists of a pulley 3 attached to the shaft of a motor 2 provided on the left frame 1, and a pulley 3 attached to the right frame 4. A carriage 7 is driven left and right on a guide shaft 6 by a wire 5 stretched between a pulley and a pulley, and a pen 8 held by the carriage is brought into contact with the paper by moving the carriage 7 up and down. A step motor 10a that reciprocates the shaft 9 within a range of 180° so that the pen 8 approaches and separates the pen 8;
Step motor 10b installed in the same way as 0a
It is configured with a roller 11 that is rotationally driven by a roller 11, a pen holder 13 holding a plurality of pens 12, and the like.
1 and a pinch roller (not shown), the motor 10b is rotated to move the paper in the front-back direction (Y direction), and the motor 2 is rotated to move the carriage 7 in the left-right direction (X direction). A pen 8 attached to a carriage 7 is used to record on paper. When replacing the pen 8 stuck in the carriage 7, drive the cartridge 7 out of the recording area on the left, return the pen 8 to the empty space of the pen holder 13, and replace the pen 8 held in the pen holder. You can now select the desired pen from the menu. The carriage 7 has a claw 14 for gripping the pen 8, and the claw 14 can be opened and closed by rotating the shaft 9 in a direction opposite to the vertical movement of the carriage. Further, a plurality of pens 12 are held on the circumference of the pen holder 13 in parallel with its rotation axis 15, and when selecting a pen, the rotation of the motor 10b is transmitted to the pen holder 13 via the roller 11 and a bevel gear (not shown). It is done by

[Problem that the invention seeks to solve]

With the above configuration, the pen dries out while the device is not in use, or even when it is in use, while it is held in the pen holder, causing scratches when it is held in the carriage and used for drawing. There was a problem where it became impossible to draw.

[Means for solving problems]

The present invention provides an X-Y plotter that solves the above problems, and its means includes a shaft fixed perpendicularly to a frame and a hollow shaft rotatably supported on the shaft. A gear is fixed to the lower end of the hollow shaft to rotate the hollow shaft by meshing with a gear attached to the paper drive roller shaft, and a pen holder capable of holding a plurality of pens is fixed to the upper end of the hollow shaft. An X-Y plotter is provided with a pen holder mechanism rotatably provided with a shaft, and a horizontally moving carriage automatically switches one of the pen holders for multicolor plotting, the pen holder mechanism comprising: A pen cap stand that holds a plurality of pen caps covering the nib of a pen held in the pen holder and is slidably provided in the middle of the hollow shaft, and biases the pen cap stand in a direction away from the pen nib. a fixed cam that is pressed by the carriage and a fixed cam that drives the pen cap base to slide along the hollow shaft against the spring only when the carriage moves out of the drawing area and the pen is replaced. This is accomplished by an X-Y plotter characterized in that it is provided with a rotary cam mechanism consisting of a movable cam.

[Effect]

The above-mentioned X-Y printer is equipped with a cap that can be opened and closed to cover the pen tip on a pen holder that accommodates multiple pens, so that the cap that covers the pen tip is always covered and is only opened when changing the pen in the carrier, so that the cap can be held in the pen holder. It is possible to prevent the pen from drying out while waiting.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a diagram for explaining one embodiment of the present invention, in which a is a top view and b is a cross-sectional view taken along line b-O-b' in diagram a.

As shown in FIG. 1, this embodiment includes a shaft 21 fixed perpendicularly to a frame 20, a hollow shaft 22 with a hexagonal cross section rotatably supported on the shaft 21, and a hollow shaft 22 press-fitted into the hollow shaft 22. a bevel gear 24 that meshes with a bevel gear 23 that is fixed and attached to the paper drive roller shaft; and a pen holder holding member 25 that is fixed to the shaft 22;
A pen holder 28 that is removably attached to the member 25 at a fixed position by a positioning means (not shown) and that has an elastic piece 27 that can removably hold a plurality of pens 26 arranged on the same circumference.
and a pen cap stand 32 which has pen caps 29 at positions corresponding to the pens 26 held in the pen holder 28 and is driven up and down on the hollow shaft 22 by a cam mechanism 30 and a pressing spring 31. There is.

FIG. 2 is an exploded perspective view for explaining the cam mechanism 30 that drives the pen cap stand 32 up and down. This cam mechanism consists of a fixed cam 40 and a movable cam 41.
and a torsion spring 42 for returning the movable cam, and the fixed cam 40 has three cam ridges 43,
Groove 44 for a stopper that restricts rotation of the fixed cam
and a stopper 45 for restricting the movement of the movable cam.
A similar cam ridge 46, a lever 47 for driving the cam, and a spring receiving hole 48 are provided opposite to the fixed cam 40, and the torsion spring 42 is assembled between the fixed cam 40 and Moving cam 41
is biased clockwise. The fixed cam 40 and the movable cam 41 are supported by the bevel gear 24 and the pen cap stand 32 via ball bearings 33 and 34, as shown in FIG. This is to reduce the load on this movement since it does not rotate along with the movement.

In this embodiment configured in this manner, the movable cam 41 normally rotates clockwise relative to the fixed cam 40 by the torsion spring 42, and the movable cam 41 is raised by both cam ridges, as shown in FIG. The spring 3 that biases the pen cap stand 32 downward as shown in
1, the pen cap stand 32 is pushed up and the pen cap 29 covers the pen tip 26a.

Next, when the carriage 35 moves in the X-axis direction as shown by the arrow and reaches the pen changing position, the movable cam 4
The lever 47 of No. 1 is pressed counterclockwise. When the lever 47 rotates, the cam ridge 46 of the movable cam 41
Since the pen slides down the slope of the cam crest 43 of the fixed cam 40, the pen cap stand 32 is pressed downward by the spring 31, and the pen cap 29 is pushed down against the pen nib 26.
The pen 26 can be detached from the pen 26 from the cartridge a, and the pen 26 can be freely replaced by a cartridge.

〔Effect of the invention〕

As explained above, in the X-Y plotter of the present invention, by providing a pen cap in the pen holder that opens in conjunction with the carriage only when the cartridge comes to the pen exchange position, the The effect of preventing the pen from drying out is remarkable.

[Brief explanation of drawings]

Fig. 1 is a diagram for explaining an embodiment of the X-Y plotter of the present invention, Fig. 2 is an exploded perspective view for explaining its pen cap stand up-and-down mechanism, and Fig. 3 is a diagram for explaining the conventional X-Y plotter. FIG. 4 is a perspective view of its internal mechanism. In the figure, 20 is a frame, 21 is a shaft, 22 is a hollow shaft, 23 and 24 are bevel gears, 25 is a pen holder holding member, 26 is a pen, 27 is an elastic piece, 28 is a pen holder, 29 is a pen cap, and 30 is a pen holder holding member. cam mechanism,
31 is a pressure spring, 32 is a pen cap stand, 40 is a fixed cam, 41 is a movable cam, and 42 is a torsion spring.

Claims (1)

[Claims] 1. A shaft 21 fixed perpendicularly to a frame 20;
A hollow shaft 22 is rotatably supported on the shaft 21, and the lower end of the hollow shaft 22 meshes with a gear 23 attached to a paper drive roller shaft.
A gear 24 for rotating the hollow shaft 22 is fixed.
A pen holder mechanism is provided at the upper end in which a pen holder 28 capable of holding a plurality of pens 26 is rotatably provided together with the hollow shaft 22, and a horizontally moving carriage automatically holds one of the pen holders 28. X- to plot multicolor while changing hands
In the Y plotter, the pen holder mechanism holds a plurality of pen caps 29 that cover the nib of the pen 26 held in the pen holder 28, and also includes a pen cap stand 32 that is slidably provided in the middle of the hollow shaft 22. ,
A spring 31 biases the pen cap holder 32 in a direction away from the pen tip, and only when the cartridge moves out of the drawing area and the pen 26 is replaced, the pen cap holder 32 is moved into the hollow space against the spring 31. An X-Y plotter characterized in that it is provided with a rotary cam mechanism consisting of a fixed cam 40 that is slidably driven along a shaft 22 and a movable cam 41 that is pressed by the carriage.