JPH0114458Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of an XY plotter.

For example, as a conventionally known XY plotter,
There is one shown in Publication No. 48-21279. This device is
As shown in FIG. 1, two sets of X-axis linear pulse motors 1 and
2, and the mover 1 of these X-axis linear pulse motors.
Y with both ends of its running path 30 fixed to 1 and 21
It consists of an axis linear pulse motor 3 and a recording pen 4 attached to a mover 31 of this Y-axis linear pulse motor 3. An X-axis signal is applied to the two sets of X-axis linear pulse motors 1 and 2 through independent drive circuits (not shown), and a Y-axis signal is applied to the Y-axis linear pulse motor 3. , to move the recording pen 4 to a predetermined position corresponding to the X and Y signals. Here, the reason why independent drive circuits are required for the X-axis linear pulse motors 1 and 2 is to maintain the Y-axis travel path always perpendicular to the X-axis travel path.

By the way, in the XY plotter configured in this way, two sets of X-axis linear pulse motors 1 and 2 are used.
Moreover, it requires two drive circuits, and the two sets of linear pulse motors 1 and 2 must operate in coordination, making the overall configuration complicated.

In order to eliminate such shortcomings,
One of the inventors of this application previously proposed an XY plotter as shown in Figure 2 in Utility Application No. 54-22808. This device is provided with a wire 5 that is movably strung across two sides almost parallel to the running path 10 of the X-axis linear pulse motor 1, and has two sides that are parallel to the running path 30 of the Y-axis linear pulse motor 3. It is connected to wires on two sides.

However, this device has the problem that when the XY plotter is made larger, errors due to expansion and contraction of the wire 5 cannot be ignored, making it impossible to maintain high accuracy.

Here, the present invention has been made to solve such problems.

One of the features of the XY plotter according to the present invention is that, in the apparatus shown in FIG. 2, the force transmission mechanism using a wire is made into a rigid body, and the influence of its expansion and contraction is eliminated.

FIG. 3 is a perspective view of the structure of the XY plotter according to the present invention. In the figure, 1 indicates one axis (e.g.
The motor is a linear stepping motor with a shaft), and is composed of a running path 10 and a movable element 11 that moves along this running path 10. 12 is a bearing that rotates while contacting the running path 10. The traveling path 10 of the X-axis linear stepping motor 1 is fixed to the frame 6 at both ends thereof, approximately at the center thereof. Reference numeral 3 denotes a linear stepping motor for the other axis (Y axis), which is composed of a running path 30 and a movable element 31 that moves along this running path 30. For example, pen 4 is attached. The running path 30 of this linear stepping motor 3 intersects with the running path 10 of the X-axis linear stepping motor 1 near the center thereof, and both ends of the running path 30 are
It is fixed at 1,52. Reference numerals 71 and 72 denote rails fixed to the frame 6, which are arranged so as to be almost parallel to the running path 10 of the X-axis linear stepping motor 1, and the carriage 5 is attached to these rails.
1 and 52 are movably coupled. 8 is mechanically coupled to the mover 11 of the X-axis linear stepping motor 1, and both ends thereof are connected to the carriage 5.
1 and 52, and moves along with the movement of the mover 11, and serves to move the running path 30 in the X-axis direction while intersecting the running path 10. The traveling path 30 and the beam 8 are connected to the carriage 51,
They are mechanically connected to each other via 52, and have an O-shaped frame shape as a whole, and a recording paper (printing surface) 9 is arranged between the running path 30 and the beam 8.

In the XY plotter configured in this way,
Travel path 30 of Y-axis linear stepping motor 3
is caused by the X-axis linear stepping motor 1.
The movable element 31 of the Y-axis linear stepping motor 3 moves in the Y-axis direction along the running path 30, and by the combined operation of the two,
The pen 4 attached to the movable element 31 can be moved to a predetermined position on the recording paper 9, and desired recording can be performed.

According to the device configured in this manner, the X-axis travel path 10 and the Y-axis travel path 30 are mechanically connected to each other by rigid bodies, so that there is no influence caused by the expansion or contraction of wires or the like. Therefore, a highly accurate XY plotter can be realized. Furthermore, since the Y-axis running path 30 is connected to the movable element of the X-axis linear stepping motor 1 near its center and is driven, the rotation due to the mass of the running path 30 of the Y-axis linear stepping motor 1 No moment is generated, and only the moment due to the mass of the mover 31 needs to be received. Therefore, a small X-axis linear stepping motor 1 can be used, and the overall configuration can be simplified.

[Brief explanation of the drawing]

1 and 2 are configuration diagrams of a conventional XY plotter, and FIG. 3 is a configuration perspective view of an XY plotter according to the present invention. 1...X-axis linear stepping motor, 10...
...Traveling path, 11... Movable element, 3... Y-axis linear stepping motor, 30... Traveling path, 31... Movable element, 4... Recording means, 51, 52... Carriage, 6... Frame, 71, 72...Rail, 8
...Beam, 9...Recording paper.

Claims (1)

[Claims for Utility Model Registration] In an XY plotter having an X-axis linear stepping motor and a Y-axis linear stepping motor, a frame 6 and both ends of the frame fixed near the center of a pair of opposing sides of the frame. a running path 10 for the X-axis linear stepping motor; and rails 71 and 72 provided on the remaining pair of opposite sides of the frame so as to be substantially parallel to the running path for the X-axis linear stepping motor.
and a carriage 5 movably coupled to this rail.
1, 52, both ends of which are fixed to the carriage, and the central part thereof is connected to the movable element 11 of the X-axis linear stepping motor, and the X-axis motor is crossed with the running path 10 by the movable element. A beam 8 that moves in the axial direction; and a running path 30 for a Y-axis linear stepping motor that moves in the X-axis direction with its both ends fixed to the carriage and intersecting the running path 10.
and a recording means 4 attached to a movable element 31 that moves along the travel path of the Y-axis linear stepping motor, and a recording paper is arranged between the beam 8 and the Y-axis travel path 30. XY plotter that records.