JPH0249526Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a coordinate reader that measures X-Y coordinate values on a drawing by aligning the center point of the index of the head with the point to be read, and more specifically,
The present invention relates to a marking device for marking a read completion mark on a read point on a drawing.

Various devices of this kind have been provided in the past, as shown in Japanese Patent Publication No. 50-37097, Utility Model Application Publication No. 49-65335, etc., but all of them are designed to control the rotational movement of the output shaft of a motor. However, the mechanism for converting the reciprocating rocking motion of the index plate and the reciprocating rocking motion of the marking member, respectively, is complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a marking device with a simple structure in which a marking member is driven using the swinging motion of an index plate driven by a motor.

The configuration of the present invention will be described below based on embodiments shown in the accompanying drawings.

2 is a table, 4 is a substrate of a reading head 6, and a Y cursor 10 is connected via a double hinge member 8.
is connected to. The Y cursor 10 is movably connected to a Y rail (not shown), which is connected to an X rail (not shown) fixed to the table 2.
They are movably connected to each other in a right-angled relationship.
The movement of the Y rail along the X rail and the movement of the Y cursor 10 along the Y rail are configured to be converted into pulse signals by separately provided XY pulse encoders, respectively, The XY pulse encoder is connected to a computer. The Y rail is provided with a keyboard, and is configured such that by pressing a record switch on the keyboard, the XY coordinate data of the center point of the index 14 on the index plate 12 of the head 6 can be input into the computer. There is. The indicator plate 12 is constituted by an acrylic disk, and the indicator plate 12
A hole 16 is transparently provided at a position in the vicinity of the index 14 at a predetermined distance from the center thereof. The index plate 1
2 is centered on one side of the table 2.
The substrate 4 is rotatably supported by a shaft 18 so as to be swingable within a plane parallel to the plane. The indicator plate 12 is biased in the direction of rotation of the hour hand about the shaft 18 in FIG. Depending on the force, the roller 22 moves to the eccentric cam 24.
It is in ballistic contact with the The roller 22 is rotatably supported by a plate member fixed to the index plate 12, and the eccentric cam 24 is supported by a motor 2 fixed to the base plate 2.
It is fixed to the output shaft of No.6. 28 is the substrate 4
This is an upright mounting block, on which a shaft 30 is rotatably supported via a ball bearing in its tube section, and the shaft 30 is biased in a predetermined return rotation direction by a coil spring 32. has been done. One end of an arm 34a is fixed to one end of the shaft 30, and the recessed portion of the other end of the arm 34a has a
A protrusion 34b' of the arm 34b is rotatably fitted in a plane perpendicular to the table 2, and the protrusion 34b' is pivotally supported by the arm 34a via a shaft 36. One of the leaf springs 38 is screwed and fixed to the upper surface of the arm 34a, and the other leaf spring 38 is in elastic contact with the upper surface of the arm 34b, and due to the elastic contact force, the arm 34b is aligned with the arm 34a. It is regulated to be the same. The arm 34b can rotate in a direction counter to the rotation of the hour hand relative to the arm 34a about the shaft 36 in FIG. 4 against the elasticity of the leaf spring 38. 4
0 is a marking member made of a commercially available felt pen or the like, and is fixed to the mounting hole of the arm 34b with a screw. Reference numeral 42 denotes a limit switch for stopping the motor, and is fixedly arranged on the base plate 4 at a position where a movable switch piece is inserted into the index plate 12 when the index plate 12 is in the return position.
Reference numeral 44 denotes a transmission member made of a rod-like member, a rope, etc., one end of which is connected to the indicator plate 12, and the other end of which is connected to the plate member 4 fixed to the shaft body 30.
It is connected to the eccentric shaft 18 of No. 6.

Next, the operation of this embodiment will be explained.

Normally, the arms 34a, 34b are held upright by the elasticity of the coil spring 32. Manually move the head 6 to a desired position on the second surface of the table, and when the center of the index 14 matches the point to be read on the drawing on the second surface of the table, stop moving the head 6 and record the Press the switch (not shown). This record switch
When the record switch is turned ON, the XY coordinate values of the point are recorded in the computer, and when the record switch is turned ON, the motor driver (not shown) outputs a motor drive signal to drive the motor 26. Driven by the motor 26, the eccentric cam 24 rotates, and the indicator plate 12 swings about the shaft 18 in the counterclockwise direction of rotation of the hour hand in FIG. Move directly above the coordinate reading point. on the other hand,
As the index plate 12 swings, the plate member 46 rotates in the direction of the hour hand in FIG. 40 descends toward the table 12. The maximum eccentric part of the eccentric cam 24 is the roller 22
The center of the hole 16 of the index member 12 is located directly above the reading point on the drawing, and at this time, the tip of the marking member 40 comes into contact with the reading point on the drawing and the corresponding Mark the reading point as complete. As the eccentricity of the cam 24 decreases, the index plate 12 is moved around the shaft 18 by the tensile force of the coil spring 20 as shown in FIG.
As well as swinging in the direction of the hour hand, the marking member 4
0 rises due to the return elasticity of the coil spring 32 against the shaft body 30, and when the indicator plate 12 returns to its original position relative to the board 4, the switch 42
is turned on, and the switch 42 stops the motor 26.

As mentioned above, the present invention utilizes the swing motion of the indicator plate driven by the motor to control the marking member in the direction of approaching and separating from the table surface, so the rotation of the output shaft of the motor There is no need to separately provide a mechanism for converting the movement into a reciprocating swing motion for controlling the marking member, and the structure can be simplified.

[Brief explanation of the drawing]

The drawings show a preferred embodiment of the present invention; FIG. 1 is a side view, FIG. 2 is a plan view, FIG. 3 is a front view, and FIG. 4 is a side view. 2...Table, 4...Board, 6...Reading head, 10...Y cursor, 12...Index plate, 16
... Hole, 14 ... Index, 24 ... Eccentric cam, 2
6...Motor, 30...Shaft body, 34a, 34b...
...Arm, 40...Marking member, 44...Transmission member, 46...Member.

Claims (1)

[Scope of utility model registration request] In a coordinate reader that converts the amount of movement of a head board 4, which is movable on a table 2, in the X-Y coordinate axis direction with respect to the table 2 into an electrical signal, it is possible to detect when the head board 4 deviates from the center point of the index 14. An index plate 12 with a marking hole 16 formed therein at a suitable location is rotatably supported at an eccentric point with respect to the center point, and a motor 26 is attached to the head board 4.
is fixedly installed, and an eccentric cam 24 is attached to the output shaft of the motor 26.
The index plate 12 is brought into elastic contact with the eccentric cam 24 so that the hole 16 is located at the original center position of the index 14 by rotation of the eccentric cam 24, and the shaft body is connected to the base plate 4. 30 is rotatably supported, arms 34a and 34b to which marking members 40 are attached are attached to the shaft body 30, and the arms 34a and 34b are attached to the shaft body 30.
A member 46 is attached in a direction perpendicular to 0, and the eccentric portion of the member 46 is connected to the arms 34a, 3 in conjunction with the swinging of the index plate 12 due to the rotation of the eccentric cam 24.
4b is lowered and the marking member 40 is connected to the indicator plate 12 via a transmission member 44 so that the marking member 40 descends onto the surface of the table 2 substantially directly below the original center position of the indicator 14. .