JPH04201497A - Digital display drafting machine - Google Patents

Abstract

PURPOSE:To conduct mounting at the same time as the mounting of a pedestal or a protractor board without manufacturing members for magnetizing, and to prevent the generation of even a mounting error by installing a magnetic magnetizing surface, on which both S.N magnetic poles are magnetized alternately, on the outer circumferential surface of the pedestal or the protractor board and setting up a magnetic sensor element oppositely faced to the magnetizing surface at a fixed gap to a scale support base. CONSTITUTION:In a protractor board, a cylindrical section is molded integrally on an outer circumference, and a magnetizing surface 10, on which both S.N magnetic poles are magnetized alternately, is installed to the cylindrical section. A magnetic sensor element 7 oppositely faced to the magnetizing surface 10 at a fixed gap is fitted on the scale support base 4 side. These magnetizing surface 10 of protractor board and magnetic sensor element 7 constitute an incremental magnetogyroscopic sensor section. The magnetizing surface 10 is set up on the underside of the protractor board, and the magnetic sensor element 7 may be mounted on a scale support base 4 oppositely faced to the magnetizing surface 10.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a digital display drafting machine.

Conventional technology and problems Conventional digital display drafting machines use a transmission-type optical character sensor configured in such a way that a main slit extending in the direction of movement of the drafting machine head is sandwiched between a sub-slit and a light emitting/receiving element. Therefore, the slits are made of etched metal with a wall thickness of about 0.1 mm or a patterned film, which tends to warp or bend. Also, the power consumption of the light emitting element is high. There are many component parts of the sensor flock, and it takes a lot of man-hours in the morning. There were problems such as difficulty in positioning the sensor.

There is also a magnetic rotation sensor consisting of a tram-shaped magnetic recording section in which both S and N magnetic poles are alternately magnetized, and a magnetic sensor element facing the iron section with a certain gap. This has been known in the past, but if it were to be attached to the head of a drafting machine, it would require a mounting structure and a mounting process, and there would be problems such as mounting errors.

Means for Solving the Problems Therefore, the present invention provides a method for alternately magnetizing S and N magnetic poles on the outer peripheral surface of a bearing base or a protractor in a means for digitally counting and displaying the rotation of a drawing machine head. A digital display drawing 11 is provided, in which a magnetically polarized surface is stepped and a magnetic sensor element is provided on a scale support base and faces the magnetically polarized surface with a certain gap therebetween. In the means for digitally counting and displaying the amount of movement of the machine in the X-axis and Y-circle direction, both S and N magnetic poles are alternately magnetized in a strip shape along the longitudinal direction of the guide rail. To provide a digital display drawing machine, in which a magnetized surface is provided, and a magnetic sensor element is provided on a movable body moving along a guide rail and faces the magnetized surface with a certain gap. That is.

According to the present invention having the above configuration, in the means for digitally counting and displaying the drawing machine J\hood rotary type, a magnetically polarized surface is provided on the outer peripheral surface of the bearing base or the protractor.
For example, a cylindrical flange is provided on the bearing base, and S-N! is attached to the side surface of the flange. can be magnetized to form a magnetized surface, so instead of attaching the magnetized circle to the bearing base as a magnetic recording part, it can be attached to the bearing base as a structural member or a part of the protractor. It is possible to install it at the same time as installing the bearing base or the protractor without producing a magnetizing member, and there is no installation error, and the structure is simplified. , has the effect of reducing the number of constituent parts of the seven-meter block and eliminating the number of man-hours required for morning stand-up, and also means to digitally count and display the amount of movement of the drafting machine head in the X-axis and Y-wheel drawing directions: In this case, since it has a structure in which a magnetized surface is provided in which both S and N magnetic poles are magnetized alternately in a band shape along the longitudinal direction of the guide rail, it has the same effect as described above, and also has a magnetic sensor. It has the advantage of simple structure, water and oil 1. This invention has two functions: providing a dental display drawing machine that is resistant to dust and can be read in the x and y directions.

EXAMPLES The present invention will be described in detail with reference to the embodiments shown below.In the embodiment shown in FIG.
1 is the bearing base of the scale operation part connected to a cursor or a boolean that moves parallel to the drawing surface;
It constitutes a non-rotating member of the present invention, and its bearing portion rotatably supports a hollow shaft rod 2. A rotating member 3 is integrally fixed to the upper part of the shaft 2 by a screw, and a scale support base 4 is integrally fixed to the lower part by a screw. A handle 5 for operating the scale is integrally fixed to the upper part of the rotating member 3, and a scale mounting plate 6 is fixed to the tip of the scale support base 4. It is constructed so that the scale attached to it can be rotated. Also,
A protractor plate 30 is rotatably attached to the bearing portion and can be fixed to the bearing base 1 by a bar 8 at any time.

Note that when the protractor 30 is fixed to the bearing base 1, the protractor 30! , becomes a part of the bearing base 1, it is of course possible to integrally configure the protractor as a part of the bearing base, and in this case, the fixed bar 8 and the like are not required.

The protractor 30 according to the present invention has a cylindrical portion integrally formed on the outer periphery, and the cylindrical portion is provided with magnetized surfaces 10 that are alternately magnetized with both S and N magnetic poles. On the scale support base 4 side, there is provided a magnetic sensor element 7 that faces the magnetized surface 10 with a certain gap therebetween. Reference numeral 9 denotes a sensor support base that supports the magnetic sensor element 7 on the scale support base 4. The magnetized surface 10 of the protractor and the magnetic sensor element 7 constitute the incremental magnetic rotation sensor section of the present invention.

Incidentally, as shown by broken lines in FIG. 1, the magnetized surface 10 may be provided on the lower surface of the protractor 30, and the magnetic sensor element 7 may be provided on the scale support base 4 facing each other.

The protractor board 30 also includes a scale fixing plate and an index plate 1.
The scale fixing plate is either omitted in the figure or can be fixed to the scale support base 4 at any time using a scale fixing lever, and the indexing plates are fixed at predetermined angles on the outer periphery of the scale fixing plate. An index/claw 12 provided on the scale support base 4 engages with the matching groove, and is configured to be fixed to the scale support base 4. The indexing claw 12 is connected to an interlocking piece 13 that interlocks along the lower surface of the scale support base 4, a shaft rod 2 and U.
It has nine pieces that can be operated to engage and disengage from the index plate 11 in conjunction with a lever 14 provided penetrating through the hollow portion of the rotating member 3 and a lever 15 provided on the side of the handle 5.

16 and 17 are integrated covers that rotate together with the scale mounting plate 6, and a digital display section 18 is provided at a suitable location on the integrated cover 16. 19 is a scale mounting screw.

Here, in the rotating member 3 of the embodiment, a screw shaft 20 having an axis along the radial direction is rotatably provided by an operation grip part 21, and an engaging member 22 is attached to the screw shaft 20 in a radial direction. 2 engages and is movable along the line.

ing. The screw shaft 20 is provided in a hollow part within the rotating member 3, and there is a threaded connection with the screw shaft 20 of the engaging member 22 in the hollow part, and a caltrop-shaped protrusion that is integral with the engaging member 22 or a rotary member. It protrudes upward from the elongated hole 3, and is configured to be able to freely move back and forth from a position close to the rotation center of the rotating member 30 to a position reached as the screw shaft 20 rotates. Further, on the bearing base l along the extension line of the screw shaft 20, in addition to the pressing mechanism member 23, a shaft 24 is protruded, and a tensile force is provided between the other end 24 and the engaging member 22. A tension member 25 having elasticity is provided. The tension member 25 consists of a tension spring 26 and a wire 27, and the wire 27 is engaged with a wire hook 28 protruding from a position close to the center of rotation of the rotating member 30.
The engagement member 22 rotates by hooking the protrusion of the engaging member 22 which rotates with the rotation of the rotating member 3 and the middle part of the ear 27, and pulls the tension member 25 with a tensile force corresponding to the radius of rotation of the protrusion. be. Further, the pressing mechanism member 23 is constituted by a rod-shaped integral member whose movement is regulated along the longitudinal direction of the screw shaft 20, and its -#i meter is brought into contact with the side of the rotating member 3, and the other end is 24 may be of a simple structure that engages with the tension member 25, but in the case of the embodiment, a pressing rod 33 movable in parallel along the screw shaft 20 is provided at one end of the pressing mechanism member 23, and the tip of the pressing rod 33 is provided at one end of the pressing mechanism member 23. The roller 34 is brought into contact with the wound part of the rotating member 30, while the tensioning member 25 is engaged with the other end 24, so that the tensile elasticity of the tensioning member 25 is applied to the rotating member 3.

Then, the engaging 8B material 22 of the rotating member 3 that rotates integrally with the scale (scale mounting plate 6), and the tension member 25
, and the positional relationship between the pressing rod 33 and the pressing rod 33 of the IK section 1-23 of the U pressing machine is as shown in FIGS. 3 to 5, when the scale is directly above the engaging member 22! ! The tension member 25 and the U pressing rod 33 are located on a straight line passing through the center of rotation of the rotation member 30 in a state where the rotation member 3 is closest to the tension member 25 and is on one radius, and the tension member 25 The tensile spring force does not apply any rotational force to the rotating member 3, and the rotational force due to the weight of the scale 6 is zero, and the engaging member moves from the state directly above the fishing platform in the horizontal direction as shown in Fig. 22, the tensioning member 25 gradually increases the tension angle from one radius above in FIG.
Applying a rotational force against this to the rotating member 3, and applying the maximum rotational force to the rotating member 3 at the maximum tension angle in the state of Fig. 5, where the scale is horizontal, to reduce the rotational force due to the scale's own weight. In addition, the pressing rod 33 applies the tension spring elasticity of the tension member 25 to the side surface of the rotation member 3 from one radial direction, reducing the uneven load of the tension member 25 applied to the rotation member 3, and continuing. When the scale is rotated from the horizontal direction to the downward direction, the tension angle of the tension member 25 gradually decreases, and when the scale is positioned directly below as shown in FIG. 5, the engagement member 22 comes to the farthest position. However, the tension member 25 and the υ pressing rod 33 are located in a straight line along one radius of the rotation member 3, as in the state shown in the third figure, and the tension spring elasticity of the tension member 25 is canceled out, and the rotation member 3 The structure is such that no rotational force is applied to the scale 60 and the rotational force of the scale 60 is balanced with zero rotational force.

Therefore, since the scale balance device has the function of stopping the scale 6 at any rotational position,
The structure of the scale fixing plate and scale fixing lever provided on the protractor plate 30 for fixing the scale support base 4 at an arbitrary angle can be omitted, and as a result, as shown in the figure, the structure of the scale fixing plate and the scale fixing lever can be eliminated. This has the advantage that the placement positions of the surface 10 and the magnetic sensor element 7 can be freely set.

On the other hand, in the embodiment shown in FIG. 2, the Y rail 35 constituting the guide rail according to the present invention has a balance weight traveling fi! 136, Y cursor 4 constituting the moving object of the present invention
A horizontal roller running path 37 and a height roller running path 38 are provided, and a horizontal roller 39 and a height roller 41 rotatably roll on each running F37 and 38, respectively, and the )' cursor 40 is moved to Y. It is provided so as to be movable along the rail 35. Also, on the Y cursor 40 is a brake lever 4.
2, a conventionally known brake device is provided in which the brake shoes 43 are in direct contact with the rail.

Here, in the case of this embodiment, the lower surface of the height roller running path 38 of the Y rail 35 is magnetized according to the present invention, in which both S and N magnetic poles are alternately magnetized in a strip shape along the longitudinal direction. Face 10
On the other hand, the )' cursor 40 is provided with a magnetic sensor element 7 that faces the magnetized surface 10 with a certain gap therebetween.

Reference numeral 44 denotes a sensor support stand erected on the Y cursor 40, and the detection cable of the sensor passes through the bottom of the cursor and is connected to a vertical circuit board 45 provided on the Y cursor 40. The vertical circuit board 45 has a Y rail 36 extending in the opposite direction from the head part)' A support plate 46 erected on the carmol extension part.
It is attached to the switch 47 and is connected to the flat cable that connects to the ・'\t section. Also,
On the vertical circuit board 45, one end of the flex cable 48 serving as a signal cable with the X cursor is connected to a connector 49.
Connect via . The flat cable 48 has appropriate elasticity and can be bent freely, and is fixed to a presser plate 52 on a presser stand 51 via a bending portion 50 and installed along the side wall of the Y rail 35. The flat cable 48 is housed in the T-shaped groove 53 by a T-shaped kite plate 54 in a vertically erected state along the longitudinal groove of the T structure 63. The guide plate 54 not only maintains the flat cable 48 in the bent state 22, but also maintains the T-slot 5.
3 and the flat cable 48, and prevents and protects the flat cable 48 from damage.
This is to maintain smooth movement within 3.

In addition, in FIG. 2, 55 is a T provided on the side wall of the Y rail 35 on the head' 18 side opposite to the T1153.
In this groove, a brake lever for operating the brake device of the X cursor is movably accommodated by a horizontal brake lever provided at a predetermined position of the rule 35.

Furthermore, between the X rail and the X cursor (not shown in the figure), a magnetized surface 10 according to the present invention, in which both S and N magnetic poles are alternately magnetized in a strip shape along the longitudinal direction of the X rail, can be provided. On the other hand, it goes without saying that the X cursor is provided with a magnetic sensor element 7 that faces the magnetization [10 with a certain gap therebetween.

Effects As described above, according to the digital display drawing machine according to the present invention, in the means for digitally counting and displaying the amount of rotation of the drawing machine head, a magnetically polarized surface is provided on the outer peripheral surface of the bearing base or the protractor. For example, it is possible to provide a cylindrical flange on the bearing base and magnetize the S and N poles on the sides to use it as a magnetized surface, so instead of attaching a magnetized disk to the bearing base, It is possible to construct the structure by magnetizing a part of the bearing base or the protractor as a structural material, and the installation can be done at the same time as installing the bearing base or the protractor without producing a magnetizing member. In addition, it does not cause installation errors, has the effect of making the structure countable, reduces the number of component parts of the sensor block, and eliminates the number of man-hours required in the morning. 5 along the longitudinal direction of the guide rail in the means for digitally counting and displaying in the direction of the image.
-Ni1 [ii Since it has a structure in which a magnetized surface is provided in which magnetic poles are magnetized alternately in a strip shape, it has the same effect as described above, and has a structure that is easy to read, which is an advantage of a magnetic sensor, and can be used for water, oil, etc. This has the effect of providing a digital display drawing machine that is resistant to dust and can be read in the X and Y directions.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of one embodiment of the present invention showing the main parts thereof, and FIG. 2 is a schematic longitudinal sectional front view showing the main parts of another embodiment. FIG. 5 is a schematic explanatory diagram showing the operation of the main parts of the embodiment shown in FIG. 1... Bearing base 2... Shaft rod 3... Rotating member 4... Scale support base 5... Scale operation handle 6... Scale mounting plate (scale) 7... Magnetic sensor element 10・・Magnetized surface 23 ・・Press mechanism member 26 ・・Tension spring 33 ・・Press rod 35 ・φY long rail 8 ・・Height roller running path 39 ・・Horizontal roller 40 ・・Y cursor 41 ・・Height roller 42・◆Brake lever 45・・Vertical circuit board 50・・Flat cable

Claims (2)

[Claims] (1) In a means for digitally counting and displaying the amount of rotation of a drafting machine head, S.
A digital display drawing machine, which is provided with a magnetically polarized surface in which N magnetic poles are alternately magnetized, and a scale support base is provided with a magnetic sensor element that faces the magnetically polarized surface with a certain gap therebetween. (2) In the means for digitally counting and displaying the amount of movement of the drafting machine head in both the X-axis and Y-axis directions, the S and N magnetic poles are alternately magnetized in a strip along the longitudinal direction of the guide rail. A digital display drawing machine, which is provided with a magnetized surface, and a moving body that moves along a guide rail is provided with a magnetic sensor element that faces the magnetized surface with a certain gap therebetween.