JPS6350200B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a ruler angle display device for a universal parallel ruler that digitally displays the rotation angle of a straightedge using an absolute type encoder plate. The main object of the present invention is to provide a device for digitally displaying the angle of a straight edge using an absolute method, in which a zero reference for angle display can be easily set. Another object of the present invention is to provide a device that digitally displays the angle of a straightedge using an absolute method, in which a plurality of zero references can be set with a simple operation. The configuration of the present invention will be described in detail below with reference to embodiments shown in the accompanying drawings. In FIG. 1, reference numeral 2 denotes a horizontal rail fixed to the upper edge of the drawing board 4, to which a horizontal cursor 6 is movably connected along the longitudinal direction of the horizontal rail 2. Reference numeral 8 denotes a vertical rail, one end of which is connected to the horizontal cursor 6 so as to be rotatable within a plane perpendicular to the 4 surface of the drawing board. The vertical rail 8
A tail roller 10 is rotatably attached to the other end, and the tail roller 10 is placed on the 4th surface of the drawing board. A vertical cursor 12 is attached to the vertical rail 8 so as to be movable along the longitudinal direction thereof, and a support member 18 of the head 16 is connected to the cursor 12 by a hinge connecting portion 14. .
Straight rulers 22 and 24 are removably fixed to a ruler attachment member 20, which is one of the components of the head 16. By manually rotating the handle 26, which is one of the components of the head 16, the ruler attachment member 20 is attached to the handle 26.
It can be rotated within a plane parallel to the four planes of the drawing board. By rotating the ruler attachment member 20, the angle of the straight ruler 22 or 24 with respect to the base line can be changed. Said straightedge 22
Alternatively, the amount of change in angle with respect to the base line 24 is configured to be digitally displayed on a display section 28 provided in the head 16. Note that the base line refers to a straight line parallel to the straight edge 22 or 24 when the display section 28 shows zero. Although the display section 28 has a liquid crystal as its main component, other components such as a light emitting diode and a display tube may also be used. If you grasp the handle 26 of the head 16 with your hand and apply force to the head 16 in any direction parallel to the 4 surfaces of the drawing board, you can move the horizontal cursor 6 along the horizontal rail 2 and move the vertical cursor 12.
head 16 by movement along longitudinal rail 8 of
And the straightedges 22 and 24 are moved to arbitrary positions on the drawing board 4. Next, the structure of the head 16 will be explained with reference to FIGS. 2 and 3. Reference numeral 14 denotes a hinge connecting member, one of which is rotatably supported by the vertical cursor 12, and the other of the hinge connecting member 14 is connected to a head support member 18. Reference numeral 26 denotes a handle, and four batteries are housed in a housing formed in a cavity inside the handle. The handle 26 has a member 3
2 and 34 are fixed with screws. 36 is a transmission plate, and guide portions 38, 40 of the member 32
As shown in FIG. 2, it is supported so as to be movable in the left and right direction. An operating member 4 is provided at the rising portion of the transmission plate 36.
2 is rotatably supported on a shaft 44, and one of the elongated pieces 46 is fixed to the operating member 42. A leaf spring 48 has one end fixed to one end of the transmission plate 36, and a rising portion 50 is formed at the other end of the leaf spring, and the rising portion 50 is inserted into a hole formed in the elongated piece 46. It's fitted. A stopper 52 is fixed to the member 32. 54 is a main shaft, which is fixed to the member 34 with a screw. A conical rod 56 is disposed in the tube portion of the main shaft 54, and the upper end of the conical rod 56 is connected to the leaf spring 48. A ring 58 is fitted onto the outer peripheral surface of the main shaft 54, and a disk 60 is rotatably fitted onto the outer peripheral surface of the ring 58. The collar portion of the board 60 is fixed to a fixing plate 62 with screws. An absolute type encoder plate 64 is fixed to the lower surface of the fixed plate 62. The fixed plate 62
is fixed to the head support member 18. Reference numeral 66 denotes a switch drive plate, the middle portion of which is connected to the lower end of the conical rod 56, and one end of the drive plate 66 is rotatably supported by the ruler mounting member 20. 6
Reference numeral 8 denotes an elongated piece, which is connected to the switch drive plate 66 so as to be interlocked with the switch drive plate 66 in the left-right direction in FIG. A shaft 70 is protruded from the elongated piece 68, and the shaft 70
is slidably fitted into a long hole 74 transparently provided in the swing piece 72. The elongated piece 68 is biased toward the left in FIG. 3 by the elasticity of the spring. One end of the swinging piece 72 is rotatably supported by the ruler mounting member 20, and the other end of the swinging piece 72 has a claw portion 72.
a is opposed to the outer peripheral surface of the index ring 76. The index ring 76 is connected to the disk 60.
It is fixed to the flange of. On the outer peripheral surface of the index ring 76, index recesses 76a are formed at every 15 degrees. The ruler mounting member 20
is fixed to the lower end surface of the main shaft 54. 78
is a limit switch fixed to the ruler mounting member 20. Reference numeral 80 denotes a groove bored in the upper surface of the fixed plate 62 along the circumferential direction. A brake band 82 is disposed in the groove 80, and the member 34 is moved by the braking action of the brake band 82. It is configured so that it can be removably fixed to the fixing plate 62. The brake band 8
The second braking operation can be performed by operating the angle brake lever 84. Next, the absolute encoder will be explained. On the outer periphery of the transparent synthetic resin encoder plate 64, the angle of the straightedge is written in 13-bit binary coded decimal notation.
A slit portion 88 for displaying seconds is formed by printing. Therefore, the slit portion 88
are formed in large numbers along the trajectory of 13 rows (10 rows are shown in the drawing, and the others are omitted) in the circumferential direction of the encoder plate 64. 90 is an IC board fixed to the ruler mounting member 20, and a support frame 92 is fixed to this. At the upper part of the recessed part of the support frame 92, there are 13
A number of light emitting elements 94 are attached in a line in the radial direction of the encoder plate 64, and in the lower part of the recessed part,
Thirteen phototransistors or light receiving elements 96 are arranged in a line in the radial direction of the encoder plate 64, corresponding to the thirteen rows of slits 88. The light receiving element 96 and the light emitting element 94 are fixed to ceramic substrates 98 and 100, respectively.
8, 100, acrylic semicylindrical lenses 102, 104 are fixedly installed. The light emitted from one light emitting element 94 passes only through the corresponding slit portion 88 of the track due to the action of the lens 104, and the light that has passed passes through the slit portion 88 of the corresponding track due to the action of the lens 102.
One light receiving element 96 facing the light emitting element 94
The light is focused only on Note that the 13 phototransistors 96 do not have to be arranged in a line along the radial direction of the encoder plate 64, and the positions of the respective phototransistors may be shifted in the circumferential direction of the encoder plate 64. Note that when the minimum unit of angle display is 10 seconds, the number of phototransistors may be 12. 10
6 is an upper cover fixed to the ruler mounting member 20, on which a display lens 108 is arranged;
A display section 28 is disposed below the display lens 108. FIG. 7 is a block diagram of the information processing circuit of this apparatus. In the figure, 110 is an absolute encoder, which includes an encoder plate 64 and a light emitting element 94.
and a light receiving element 96 are the main constituent elements.
In the case of the absolute method, the code on the encoder plate 64 is always set to 1 when compared with the signals before and after itself to avoid errors with adjacent positions.
It uses a code with only bit changes, that is, a unit distance code. Therefore, this unit distance code is converted in a code conversion circuit 114 into a code that is easy to calculate in the next subtraction circuit 112, such as a BCD code. An example of the unit distance code and BCD code is as follows.

[Table] Reference numeral 130 denotes a preset section, which is constructed so that a BCD code signal can be input by manual operation, and whose main component is a commercially available D-type flip-flop circuit. 118 is a display unit drive control circuit, and 28 is a display unit, which is composed of a 7-segment numerical display circuit using liquid crystal. The preset section 130 includes a reset switch 132.
When the switch circuit 134 is closed by pressing the button, that is, the switch is turned ON, a pulse signal is supplied to the preset section 130, and the preset section 130 is configured to output a preset value. The output terminal of the code conversion circuit 114 is connected to the preset input terminal of the preset section 130. Next, the operation of this embodiment will be explained. First, turn on the main switch. Next, when you want to change the direction angle of the straightedges 22 and 24,
The operating member 42 is pushed to the left in FIG. 2, and the transmission plate 36 is moved to the left. As the transmission plate 36 moves to the left, the leaf spring 48 moves to the left. At this time, the conical rod 56 is tilted in the counterclockwise direction of rotation of the hour hand, centering on its middle enlarged portion. The switch drive plate 6 is moved by the displacement of the conical rod 56 in the counterclockwise direction of rotation of the hour hand.
6 swings in the counterclockwise direction of rotation of the hour hand in FIG. 3 about the support shaft. This rocking motion of the switch drive plate 66 turns on the limit switch 78, cancels the power saving state, and lights up the light emitting element 94.
On the other hand, due to the displacement of the conical rod 56 in the counterclockwise rotating direction of the hour hand in FIG.
As a result, the ruler mounting member 20 becomes freely rotatable. When the operating member 42 is pushed to the left in FIG.
When the hour hand rotates in the counterclockwise direction around , the tip of the elongated piece 46 pushes the leaf spring 48 downward,
The rising portion of the leaf spring 48 is connected to the second stopper 52.
The transmission plate 36 comes into contact with the left side surface in the figure, and is locked at the leftward movement position. Next, hold the handle 26 with your hand, and
6 and the members 32, 34, main shaft 54, and ruler attachment member 20 are rotated around the board 60, the straight rulers 22, 24 rotate in a plane parallel to the drawing board 4 surface. In conjunction with the rotation of the straightedges 22 and 24, the light receiving element 96 and the light emitting element 94 move along the absolute encoder plate 64, and the encoder 110 generates a digital signal corresponding to the rotation angle of the straightedge 22, that is, Outputs unit distance code signal. This code signal is converted into a BCD code signal by the code conversion circuit 114, and the BCD code signal A is input to the subtraction circuit 112. On the other hand, the BCD code output signal B output from the preset section 130 is sent to the subtraction circuit 112.
is input to the circuit and held in the circuit. Subtraction circuit 1
In step 12, perform the operation A-B=C and obtain this
The BCD code output signal C is input to the display section drive control circuit 118, where decoding and necessary control operations are performed, and finally the output of the subtraction circuit 112 is displayed on the display section 28 as a decimal value. When switch 132 is OFF, preset section 1
From 30, the preset value set last time is output. When the reset switch 132 is turned on,
A pulse signal of "1" is sent from the switch circuit 134 to the preset section 130, and the value A of the code conversion circuit 114 at this point is set to the preset section 13.
0 as a new preset value B, and the preset value B is input to the subtraction circuit 112. Therefore, reset switch 1 of subtraction circuit 112
The output C at the time of 32ON becomes C=A-B=0,
A zero signal is sent to the display section drive control circuit 118, and the display section 28 displays zero. Then, when the straightedge 22 is rotated from this new zero reference, the display section 28 displays the value of AB, that is, the rotation angle of the straightedge 22 from this new zero reference. Furthermore, when it is desired to set a new zero reference, the reset switch 132 can be turned on. Next, another embodiment will be described with reference to FIG. Reference numeral 130 denotes a preset section, the main component of which is a D-type flip-flop circuit. 132
is a reset switch, 112 is a subtraction circuit, 110
114 is an absolute encoder, 114 is a code conversion circuit, 120 is an A/C selection circuit, 122 is a selection switch, 118 is a display unit drive control circuit, 2
8 is a display section. In the above configuration, the straight edge 22 is set at an arbitrary angle, and the selection switch 12 is
When the second movable switch piece 122a is moved to the C contact side and the reset switch 132 is turned on in this state, the display on the display 28 becomes zero, and the angle of the straightedge 22 is shown on the display 28 based on this zero. Is displayed. If you want to know the angle of the straightedge 22 from the zero reference before this zero reference, you can simply switch the position of the movable switch piece 122a of the selection switch 122 to the A contact side. In addition, as shown in FIG. 9, the reset switch 13
2, subtraction circuits 112a, 112b, and selection switch 1.
By increasing the number of switching contacts 22a, triple, quadruple, or other multiplex circuits can be constructed. In addition, the output terminal of the code conversion circuit 114 is connected to the selection circuit 1.
It is not necessary to connect to the input terminal of 20. In carrying out the present invention, when the reset circuit is turned on, the same value as the signal at one input end of the subtraction circuit when the switch is turned on is set at the other input end of the subtraction circuit. The switch used in this reset circuit is not particularly limited to what is shown in the drawings. Alternatively, the encoder plate may be configured to rotate in accordance with the swinging of the straight edge. Since the present invention is configured as described above, when resetting the angle display to zero, it is only necessary to operate a switch, and the reset operation can be performed easily.Moreover, the multiple degree operation can be performed with a simple operation. There are some effects, such as being able to do it with ease.

[Brief explanation of the drawing]

The drawings show a preferred embodiment of the present invention, in which Fig. 1 is an overall plan view, Fig. 2 is a sectional view of the head, Fig. 3 is a plan view showing the internal structure of the head, and Fig. 4 is taken along the line A--A. 5 is a plan view of the encoder plate, FIG. 6 is an explanatory diagram of the encoder, FIG. 7 is a block diagram showing the electronic circuit of this device, and FIG. 8 is a block diagram showing another embodiment of the same. , FIG. 9 is a block diagram showing another embodiment of the same. 2...Horizontal rail, 4...Drawing board, 6...Horizontal cursor, 8...Vertical rail, 16...Head, 20...
Ruler mounting member, 22, 24...Straight ruler, 26...
Handle, 28...display section, 42...operation member,
56... Conical rod, 60... Board, 64... Encoder plate, 78... Limit switch, 84... Angle brake lever, 64... Encoder plate, 88...
...Slit portion, 90...IC board, 92...Support frame, 94...Light emitting element, 96...Light receiving element, 9
8,100... Ceramic substrate, 102,104
...Lens, 106...Top cover, 108...
Display lens, 110... Absolute encoder, 112... Subtraction circuit, 114... Code conversion circuit, 118... Display unit drive control circuit, 12
0...A/C selection circuit, 122...Selection switch, 130...Preset section, 132...Reset switch.

Claims (1)

[Claims] 1. A head supported on the drawing board so as to be movable in a predetermined direction along the drawing board surface while maintaining a predetermined orientation, and a stand rotatably attached to the head. A ruler, an absolute encoder that converts the rotation angle of the straightedge into a digital pulse encoded signal, and an output side of the absolute encoder are connected to each other, and the output numerical signal of the encoder is output every time a pulse is input. a preset section for output; a reset switch for supplying the pulse to the preset section; a subtraction circuit for subtracting (A-B) between the output A of the absolute encoder and the output B of the preset section; A ruler angle display device for a flexible parallel ruler, comprising a display section that numerically displays the result of circuit subtraction. 2. A head supported on the drawing board so as to be movable in a predetermined direction along the drawing board surface while maintaining a predetermined orientation, a straightedge rotatably attached to the head, and the straightedge an absolute encoder for converting the rotation angle of the encoder into a digital pulse encoded signal; and at least one encoder connected to the output side of the absolute encoder and outputting an output numerical signal of the encoder each time a reset pulse is input. a preset section, a reset switch that supplies the reset pulse to the preset section, and a subtraction circuit that performs subtraction (A-B) between the output A of the absolute encoder and the output B of the preset section; A flexible circuit comprising a selection circuit that receives the output of the subtraction circuit and the output of the absolute encoder, selects and outputs one of these, and a display unit that numerically displays the output of the selection circuit. Parallel ruler ruler angle display device. 3. A head supported on the drawing board so as to be movable in a predetermined direction while maintaining a predetermined orientation along the drawing board, a straightedge rotatably attached to the head, and a straightedge attached to the head so as to be rotatable. An absolute encoder that converts the rotation angle into a digital pulse encoded signal, and a plurality of preset sections that are connected to the output side of the absolute encoder and output numerical signals output from the encoder each time a reset pulse is input. , a reset switch provided for each preset section that supplies the reset pulse to the preset section, and a subtraction (A) between the output A of the absolute encoder and the output B of the preset section.
-B), a subtraction circuit provided for each preset section, a selection circuit provided with the outputs of the plurality of subtraction circuits and selecting and outputting one of them, and an output of the selection circuit. A ruler angle display device for a universal parallel ruler, which comprises a display section that displays .