JPH05389Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a digital display vernier device for a universal parallel ruler.

Conventionally, it has been relatively easy to read and set the rotation angle of a scale on a universal parallel ruler up to the minimum division of the degree scale, but it has been difficult to read and set the rotation angle of a scale below the minimum division.

Therefore, the present invention provides a digital display type vernier device for a universal parallel ruler, which digitally reads and displays the vernier reading angle by the conventional vernier based on the detection signal of the encoder.

The present invention will be explained in detail with reference to the embodiments shown below. In Figs. 1 and 2, numeral 1 indicates a scale operating head of a universal parallel ruler. This guides the robot so that it can move freely in parallel.
Reference numeral 2 denotes a head support that is immovable with respect to the rotation of the scale, and is provided with a hollow cylindrical bearing portion 3 at its center. A hollow head shaft 4 is rotatably supported on the inner periphery of the bearing portion 3. An operating head mounting plate 5 is integrally provided at the upper end of the head shaft 4 with a nut 5a, and an operating head 6 is integrally mounted on the mounting plate 5. Further, a scale support plate 7 is integrally fixed to the lower end of the head shaft 4 by fixing screws 7a, and a scale mounting plate 8 for directly attaching a scale to the scale support plate 7 is attached.
9 is a cover body that covers the lower surface of the scale support plate 7;
It is integrally fixed to the scale support plate 7. The bearing portion 3 of the head support 2 is integrally provided with a flange portion 2a that extends outward.
A degree fixing lever 10 and a baseline fixing lever 11 are provided on the top. The degree fixing lever 10 is screwed into a tightening rod 12, and by rotating it, the clamping piece 12
a, it is configured to tighten and release the locking plate 13 interposed between the flange portions 2a. The locking plate 13 is located below the flange portion 2a.
It is integrally fixed to the head shaft 4 with a fixing screw 13a. That is, by tightening the degree fixing lever 10, the scale can be fixed at any rotational position. Further, a lower cylindrical portion 2b integral with the head support 2 is located on the outer periphery of the head shaft 4,
A multi-stage cylindrical baseline adjustment member 14 is rotatably attached to this.
are mated. A fixing groove 14a is provided in a circumferential manner on the upper surface of the baseline adjustment member 14, and a clamping piece 15a of the tightening rod 15, which is operated by tightening and unfastening operations of the baseline fixing lever 11, is provided in the upper surface of the baseline adjusting member 14. It clamps the fixing groove 14a so that it can be tightened. A protractor board 16 having a protractor scale 16a is integrally provided on the outer circumference of the upper surface of the base line adjustment member 14. Further, on the lower side of the base line adjustment member 14, an indexing board 17 having engaging recesses 17a at predetermined angle intervals of, for example, 15 degrees is integrally provided with fixing screws 17b. and,
A locking pawl member 18 that operates around a fulcrum shaft 18a on the scale support plate 7 is configured to be removably engaged with the engaging recess 17a. That is, the locking pawl member 18 is attached and detached by an index lever 19 that protrudes to the side of the operating head 6, and the tip of the arm portion 19a of the lever 19 is provided in the hollow of the head shaft 4. Upper end 20a of lever shaft 20
The lower end 20b of the scale support plate 7 is engaged with the scale supporting plate 7.
Actuating member 2 movable in the left and right direction on the lower side of the
The interlocking pin 21a, which is engaged with the rear end of the scale support plate 7 and further provided at the tip of the actuating member 21, protrudes upward from the relief hole of the scale support plate 7 and fits into the engagement hole of the locking claw member 18. ing. Further, the actuating member 21 is given an elastic force by a tension spring 22 so as to constantly act in a direction (to the left in the figure) to engage the locking pawl member 18 with the engagement recess 17a.

On the other hand, a disk-shaped main scale 25 constituting an encoder as an angle detection device is integrally fixed to the outer periphery of the baseline adjustment member 14 by a fixing plate 23 and fixing screws 24. The main scale 25 is provided with 2160 equally spaced slits along the circumference for a 10' reading, for example. On the other hand, on the scale support plate 7 side, as shown in the figure, an index scale 26 having a slit is provided facing each other, and a pair of light emitting element and light receiving element 27 is provided.
a and 27b are configured to detect relative movement between the scales 25 and 26. Reference numeral 28 denotes a support stand which is integrally supported on the scale support plate 7 by fixing screws 29, and the index scale 26, light emitting element and light receiving elements 27a and 27b are integrally fixed to this support stand. Reference numeral 31 denotes a vernier display member integrally provided on the scale support plate 7. On the vernier display member 31, a stroke segment type numerical value display section 30 according to the present invention is provided. Vernier display member 3
1 has an indicator board 3 facing the outer periphery of the protractor board 16.
2 are integrally provided, and an index line 32a is provided on the index board 32 opposite to the minute scale 16a.
The upper part of the opposing portion of the protractor dial 16 and index dial 32 is covered with a transparent window part 33.

Next, a more detailed explanation will be given with reference to the block diagram of the electric circuit of the device of the present invention shown in FIG. The phase direction is sent to the discrimination circuit 42, and the phase direction is discriminated according to the rotation direction of the scale support plate 7, which is integrated with the scale, with respect to the base line adjustment member 14 fixed to the head support 2, and the polarity reversal circuit 4
Sent to 3. The polarity inversion circuit 43 detects a polarity signal of + (plus) for counterclockwise direction and - (minus) for clockwise direction depending on the direction of rotation around the base line of the scale (i.e., count "zero"). At the same time, in order to display the absolute value of the angle from the base line of the scale based on this polarity signal, the angle signal is raised by inverting the polarity around the count "zero" reset by the reset circuit 50 at the base line of the scale. Input to down counter 44. The rotation angle of the scale counted by the up/down counter 44 is, for example,
In the case of 10′ reading, 10′, 20′, ...50′, in the positive direction
The angle is counted as 0', 10', etc., and the angle is displayed on the stroke segment type numerical display section 30 by the dynamic drive circuit 45. 47 is a zero detection circuit that detects the count "zero" of the up/down counter 44;
Detect count “180°” of counter 44
It is a 180° detection circuit. Each of these detection circuits 47, 4
The detection signal No. 8 is sent to the polarity reversing circuit 43, and the polarity reversal circuit 43 rotates the detection signal 10', 20', . . . 50', in the negative direction from 0°.
It is possible to display counts as 0', . . . , and it is configured so that the counting direction can be reversed using 180 degrees as a reference point. To explain the above configuration specifically, when the scale is rotated counterclockwise from the base line position, the encoder circuit 4
Direction determination circuit 42 based on the angle signal detected by
A + (plus) polarity signal is obtained, an angle signal in the up-count direction is sent from the polarity inversion circuit 43 to the up-down counter 44, and the vernier angle of the scale is digitally displayed on the stroke segment type numerical display section 30. be done. Conversely, when the scale is rotated clockwise from a position rotated 30 degrees counterclockwise, for example, based on the angle signal detected by the encoder circuit 41, the polarity reversing circuit 43 outputs an angle signal in the down-counting direction.
The value sent to the counter 44 and subtracted on the stroke segment type numerical display 30 is displayed as the vernier angle of the scale. When the scale rotates further clockwise beyond the base line, the polarity is determined by the detection signal of the zero detection circuit 47. The polarity is inverted by the inverting circuit 43, and an angle signal in the up-counting direction is sent to the up-down counter 44. When the scale rotates more than 180° from the base line, the detection signal from the 180° detection circuit 48 is sent to the polarity reversal circuit 43, the polarity is reversed, and the vernier angle of the stroke segment type numerical display section 30 is also changed. A subtracted display is made. In the figure, 46 is a rectangular wave oscillation circuit, and 49 is a power switch.

According to the digital display type vernier device for the universal parallel ruler according to the present invention, the stationary part on the protractor 16 side having the minute scale 16a of the scale operation head, and the index plate 32 side having the index line 32a rotating together with the scale. A flexible parallel ruler that is provided with an encoder that detects the amount of rotation between the rotating part of the ruler and that digitally reads and displays the vernier reading angle below the minimum scale of the degree scale of the protractor based on the detection signal of the encoder. In the digital display type vernier device in
0, and the numerical display section 30 has a minute scale 16.
Index line 3 of index board 32 provided opposite to the outer periphery of a
2a, the rotation angle of the scale up to the minute scale of the protractor can be read instantly by visual recognition of the protractor and indicator dial, and the vernier reading of the protractor is also possible. The angle can be read instantaneously using the stroke segment type numerical display section 30 placed side by side with the index line 32a of the index board 32, so you can intuitively read the minute angle and vernier angle, which are placed one-on-one with the index line 32a as the boundary. The scale rotation angle can be read instantly, and the scale rotation angle can be read and set quickly and accurately.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of an embodiment of the device of the present invention;
Figure 2 is a vertical sectional view showing the main part of the structure, Figure 3
The figure is a block diagram of the electric circuit. DESCRIPTION OF SYMBOLS 1... Scale operating head, 2... Head support, 3... Bearing section, 4... Head shaft, 6... Operating head, 7... Scale support plate, 10... Minute fixing lever, 11... Baseline fixing lever, 14... Baseline adjustment member, 16... Protractor board, 16a... Minute scale, 25... Main scale, 26... Index scale, 27a... Light emitting element, 27b...
Light receiving element, 30... stroke segment type numerical display section, 32... indicator board, 41... encoder circuit,
42... Direction discrimination circuit, 43... Polarity inversion circuit,
44...up/down counter, 50...
reset circuit.

Claims (1)

[Scope of utility model registration request] An encoder for detecting the amount of rotation is provided between a stationary part on the protractor plate 16 side having the minute scale 16a of the scale operation head and a rotating part on the index plate 32 side having the index line 32a rotating together with the scale. , in a digital display vernier device for a universal parallel ruler that digitally reads and displays a vernier reading angle below the minimum scale of a degree scale of a protractor board based on a detection signal of the encoder, the numerical display part of the vernier reading angle is provided. Consisting of one stroke segment type numerical display section 30, the numerical display section 3
A digital display type vernier device for a universal parallel ruler, characterized in that 0 is arranged parallel to an index line 32a of an index board 32 provided opposite to the outer periphery of a minute scale 16a.