JPH0128720B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a drafting head that can automatically perform work that belongs to routine work among drawing work that is performed while manually operating a drafting head equipped with a horizontal scale and a vertical scale. Regarding.

In general, the drawing work performed by designers involves the creative part of embodying one's design ideas into shapes or lines, and
For example, it consists of routine work such as drawing or dimensioning parts that meet JIS standards. A writing device suitable for completely separating only the routine work portion of this drawing work from the creative drawing work is disclosed in Japanese Patent Application Laid-Open No. 1977-197. This writing device has a keyboard part for selecting a symbol to be written and a writing part, and the writing part has a writing pin movable between a rest position and a writing position, and the writing part has a writing pin movable between a rest position and a writing position. The writing pin is movable in two coordinate axes by means of two motors driven in accordance with the symbol to be written, and in this case at least the writing part can be attached to the drawing head of the drawing machine, Motors for moving the writing pins are disposed immovably relative to each other, and a writing arm holding the writing pin is movable in one coordinate axis direction and movable in the other coordinate axis direction by the first motor. the first of
mounted on the guide rail, and the writing arm is movable in the direction of the other coordinate axis;
It is characterized in that it is mounted on a second guide rail movable by a second motor in the direction of one of the coordinate axes.

However, when the above-mentioned writing device is attached to a drafting head, an unbalanced load is generated on the drafting head, and the rotation and translation operations of the drafting head are performed in an unbalanced and heavy state. In addition, the above-mentioned writing device is used by being attached to a scale attachment part that is formed to intersect vertically and protrudes from the center of the drafting head after removing either the horizontal scale or the vertical scale. Therefore, the transition from manual video work to automatic routine work is never smooth.

The purpose of the present invention is to eliminate defective operations due to the influence of unbalanced loads in the rotation and translation operations of the drafting head.
Another object of the present invention is to provide a drafting head that allows smooth transition between manual drawing work and automatic routine work. The present invention has been proposed to achieve the above object, and includes a manual motion mechanism section that has a rotatable handle shaft that forms the center of rotation of the drafting head and occupies the upper part of the drafting head, and a writing instrument at the tip. A computer-controlled drawing pen drive mechanism that occupies the lower part of the drafting head and has a pen arm for holding the drawing head, and an L that is integrally formed with the lower casing to which the drawing pen drive mechanism is attached and projects laterally from the lower casing. A drafting head board is integrally connected to the lower end of the handle shaft, and is integrally connected to the lower casing via a spacer so that the center of the handle shaft approximately coincides with the center of gravity of the device. Further, the pen arm is characterized in that the tip of the pen arm protrudes sideways with respect to the lower casing outside the manual motion range defined by the scale attachment portion and the extension line of the scale attachment portion.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 1 to 3. FIG. 1 shows the entire drafting apparatus 2 incorporating a drafting head 1 of the present invention. That is, the horizontal rail 3 is fixed to the upper edge of the drawing board 5. This horizontal rail 3 protrudes from both sides of the drawing board 5 to the left and right, and the horizontal rail 3
The vertical rail 4, which moves along the drawing board 5, is allowed to move to the end portions 3a and 3b of the horizontal rail 3, which are outside of both sides of the drawing board 5.

An auxiliary rail 13 is provided at the lower end 4b of the vertical rail 4 so as to protrude in the lateral direction (to the right) of the vertical rail 4. On the other hand, a roller 14 that comes into rolling contact with the auxiliary rail 13 is pivotally supported at the lower left end of the drawing board 5 . These auxiliary rails 13 and rollers 14 ensure smooth running of the vertical rail 4 when it extends beyond the left side of the drawing board 5 further to the left.

A control section 7 is attached to the upper surface of the vertical rail 4 to generate a signal for controlling a drawing pen drive mechanism section 6 incorporated inside the drawing head 1. This control section 7 has a key box 8 as a part thereof. A large number of operation keys 9 are arranged on the top surface of the key box 8.

A power supply device 10 is located near the upper left end of the drawing board 5.
is fixed. A cord 11 runs from the power supply device 10 to the control unit 7 via the upper end 4a of the vertical rail 4.
has been extended. A cord 12 also extends from the control section 7 toward the drafting head 1.

The drafting head 1 is connected via a connecting member 16 to a carriage 15 assembled to the lower surface of the vertical rail 4, and projects from the vertical rail 4 to the right. The drafting head 1 has a knob 17 which is grasped by the drafter to perform translational or rotational displacement operations of the drafting head 1, and is integral with the lower casing 18 at one end of the lower casing 18.
It also has a scale attachment part 19 formed to protrude from the lower casing 18 in an L-shape. Each scale mounting part 19 has a vertical scale 20.
and a horizontal scale 21 are attached.

The manual operation range by the drafting head 1 is the range from the horizontal scale 21 to the vertical scale 20 which is 90 degrees counterclockwise, and the other part, that is, the horizontal scale which is 270 degrees counterclockwise from the vertical scale 20. A part of the range up to 21 is set as the range for automatic drawing. In this embodiment, a rectangular area on the left side of the vertical scale 20 above the drawing head 1 is set as the automatic drawing range. Tip portion 22a of pen arm 22 of drawing pen drive mechanism section 6
is located within the above automatic drawing range. The positional relationship between the automatic drawing range and the manual drawing range is fixed for the drawing head 1, and remains unchanged even if the drawing head 1 is translated or rotated. Therefore, the manual drawing work and the automatic drawing work on the drawing board 5 can be switched from the drawing head 1 as before.
This can be accomplished by only parallel translation or rotational translation operations. Moreover, since the vertical rail 4 can move until it protrudes from both the left and right sides of the drawing board 5, both the manual drawing range and the automatic drawing range can cover the entire surface of the drawing board 5.

Next, referring to Figures 2 and 3, draw the drafting head 1.
The structure of is explained in detail. The internal structure of the drafting head 1 includes a manual motion mechanism section 23 occupying the upper part thereof.
and a drawing pen drive mechanism section 6 occupying the lower part.

In the manual motion mechanism section 23, the knob 1 is mounted on the top of a vertically erected rotatable handle shaft 24.
7 is fixed. An outward flange 25 is formed at the lower end of the handle shaft 24, and a drafting head board 26 is fixed to this outward flange 25.

The handle shaft 24 is fitted into a metal bearing 27 and is rotatable relative to the metal bearing 27. The bearing metal 27 is coupled to the connecting member 16.
The bearing metal 27 cannot rotate with respect to the connecting member 16, but can swing. A perforated disk-shaped fixing plate 29 is fixed to an outward flange 28 provided at the lower end of the bearing metal 27 .

A protractor board 30 in the form of a perforated disc is located below the fixing board 29. An angle indexing gear 31 is fixed to the lower surface of the protractor 30. The handle shaft 24 is normally rotatable relative to the protractor 30.

The drafting head board 26 has an elongated claw operation plate 3.
2 is slidable and this drafting head board 2
It is arranged so that it can rotate integrally with 6. Claw operation board 3
A claw 38 is provided at the tip 32a of the claw 3.
8 engages with the angle indexing gear 31, the handle shaft 24 and the protractor 30 are fixed to each other. That is, the handle shaft 24, the protractor board 30, and the drafting head board 26 can rotate together.

The claw operation plate 32 is moved by an index lever 33 projecting laterally from the knob 17 via a swing pin (only the center line is shown) disposed inside the handle shaft 24.

The entire upper surface of the protractor 30 is covered with a substantially transparent protractor cover 34.
An upper casing 35 is incorporated as a part of the drafting head 1 and hangs down from around the protractor cover 34 so as to cover the peripheral surface of the main parts of the drafting head 1 except for the scale attachment part 19.

The lower end portion 35a of the upper casing 35 is fitted onto the rising portion 18a of the lower casing 18, and at a portion where the lower end portion 35a and the rising portion 18a overlap, the upper casing 35 and the lower casing 18 are connected by screws 37. are connected by.

Each component of the drawing pen drive mechanism section 6 is attached to the bottom portion 18b of the lower casing 18.

Moreover, in the bottom part 18b of the lower casing 18,
A spacer 39 having an inward flange 38 at its upper end is formed upright. The upper surface side 38a of the inward flange 38 is in contact with the drafting head base plate 26.

On the other hand, a short spacer 40 is also formed on the ceiling surface 35b of the upper casing 35 in a downward direction corresponding to the spacer 39. These spacers 39 and 4
0, the drafting head board 26 is located.
The inward flange 38 has a threaded hole formed therein;
A nut 40a is attached to the spacer 40, and a nut 40a is attached to the spacer 40.
It is inserted during molding. Drafting head board 26
An insertion hole for a screw 41 is formed in the hole.
The drafting head board 26 has spacers 39 and 4.
The screw 41 screwed into the upper casing 3
5 and the lower casing 18.

Since the drafting head board 26 is integrally connected to the lower casing 18, the lower casing 1
A scale mounting portion 19 integrally formed with the handle shaft 24 is always rotated integrally with the handle shaft 24.

Next, referring to FIG. 3, the drawing pen drive mechanism section 6
The configuration and operation of this will be explained.

At the bottom 18b of the lower casing 18, a motor 42 for moving in the Y-axis direction belonging to the stepping motor and a motor 42 for moving in the Motor 43 is fixed.

A solenoid 44 is fixed to the bottom portion 18b at a position to the left of the motor 42 for moving in the Y-axis direction and adjacent to the motor 42 for moving in the Y-axis direction.

Most of the weight of the drawing pen drive mechanism 6 is due to the motor 43 for moving in the X-axis direction and the motor 42 for moving in the Y-axis direction. The weight of the horizontal scale 21 and vertical scale 20 attached to the scale attachment part 19 due to the presence of a heavy object on the side closer to the connecting member 16
The weight balance around the handle shaft 24 is made appropriate. By optimizing the weight balance so that a particularly large unbalanced load does not occur around the handle shaft 24, fine rotational movement and parallel movement of the drafting head 1, or lifting operation of the drafting head 1 can be performed in a state with good operability. It will be held in

One end 46a of a solenoid link element 46 is pivotally supported at the tip of the rod 45 of the solenoid 44. This solenoid link element 46 is pivotally connected to the bottom part 18b by a fixed pivot 47 in its intermediate position. Solenoid link element 46
The other end 46b is associated with the side piece 48a of the pen lift link element 48 to allow the pen lift link element 48 to pivot in the vertical direction. The pen lifting link element 48 is an elongated member and is arranged along the longitudinal direction of the bottom plate 18b.

Pinion 49 of the motor 42 for moving in the Y-axis direction
meshes with the reduction gear 50, and this reduction gear 50
is integrally connected to a Y rotation shaft 51 having a square cross section. A first Y timing pulley 52 is coupled to the Y rotation shaft 51 so as to be able to rotate integrally with the Y rotation shaft 51 and to be slidable relative to the Y rotation shaft 51 . The first Y timing pulley 52 is integrally and slidably connected to the first X slider 53.

A large number of teeth are formed on the periphery of the first Y timing pulley 52, and a Y timing belt 54 having teeth that mesh with these teeth is wound around the first Y timing pulley 52.

As described above, the Y timing belt 54 is wound around the first Y timing pulley 52 on one side, and wrapped around the second Y timing pulley 5 on the other side.
It is wrapped around 5. This second Y timing pulley 55 is integrally and slidably coupled to a second X slider 56.

Two X slide shafts 57 and 58 are parallel to the Y rotation shaft 51, and the bearing 5 is fixed to the bottom portion 18b.
It is arranged in a state where it is supported by 9. A first X slider 53 is disposed on the X slide shaft 57, and a second X slider 56 is disposed on the X slide shaft 58.
is installed.

The X sliders 53 and 56 are integrally connected by two Y slide shafts 60 and 61, and one Y slider 62 is disposed on these Y slide shafts 60 and 61. This Y slider 62 is fixed to the Y timing belt 54, and the pen arm 22 is pivotally supported on this Y slider 62, and abuts on the pen lifting link element 48 at a midway portion thereof.

Pinion 64 of the motor 43 for moving in the X-axis direction
meshes with the reduction gear 65, and this reduction gear 65
A timing pulley 66 is integrally connected coaxially with. The timing pulley 68 is coupled to the timing pulley 66 via the timing belt 67 so as to transmit torque, and the timing pulley 68 is connected to the X slide shafts 57 and 5.
It is integrally connected to an X rotation shaft 69 disposed perpendicularly to the rotation axis 8 . On this X rotation shaft 69, a timing pulley 70 is integrally coupled to the X rotation shaft 69 at a position opposite to the mounting position of the timing pulley 68.

The timing pulley 72, which is coupled to the timing pulley 68 via the timing belt 71 so as to be able to transmit torque, is supported near the scale mounting portion 19 by a bearing 73 fixed to the bottom portion 18b.

On the other hand, the timing pulley 75 which is coupled to the timing pulley 70 and the timing belt 74 so as to transmit torque is a bearing 7 similar to the bearing 73.
It is pivoted on 6.

A second X slider 56 is fixed to the timing belt 71, and a first X slider 53 is fixed to the timing belt 74.

The amount of rotation and driving order of the motor 43 for moving in the X-axis direction and the motor 42 for moving in the Y-axis direction are controlled by a program set in the control unit 7. The held drawing pen is moved so that it can draw automatically.

As described above, according to the present invention, the new computer-controlled drawing pen drive mechanism and the conventional manual drawing mechanism are integrated, so routine work can be automatically performed as a function of the drawing head when desired. This can be done using the drawing pen drive mechanism, and switching between automatic drawing and manual drawing can be performed smoothly.

Furthermore, in the present invention, a relatively heavy drive mechanism part is disposed within the lower casing, and a manual motion mechanism part is disposed above the lower casing so that the center of the handle shaft is substantially the entire center of gravity. Since the scale is formed as a scale, the balance around the axis of rotation for tilting the scale does not change significantly and instability of work does not occur.

Furthermore, the present invention allows the pen arm to be placed at any position outside the drawing range defined by the two scales, so it is not necessary to perform separate setting operations for motion drawing and automatic drawing. Since this is not necessary, the work can be done even more quickly.

[Brief explanation of drawings]

FIG. 1 is a plan view of a drafting apparatus having a drafting head of the present invention, FIG. 2 is a longitudinal sectional view of the drafting head,
FIG. 3 is a partially cutaway plan view of the drawing pen drive mechanism section. DESCRIPTION OF SYMBOLS 1... Drawing head, 6... Drawing pen drive mechanism part, 18... Lower casing, 19... Scale attachment part, 22... Pen arm, 22a... Tip part of pen arm, 23... Manual drawing mechanism part, 24 …
...Handle shaft, 26...Drafting head board, 39...
…Spacer.

Claims (1)

[Claims] 1. Drawing of a manual motion mechanism that has a rotatable handle shaft that forms the center of rotation of the drafting head and occupies the upper part of the drafting head, and a computer-controlled part that has a pen arm that holds a writing instrument at the tip and occupies the lower part of the drafting head. A pen drive mechanism unit and an L that is integrally formed with the lower casing for attaching the drawing pen drive mechanism unit and protrudes in the lateral direction of the lower casing.
A drafting head board is integrally connected to the lower end of the handle shaft, and is integrally connected to the lower casing via a spacer so that the center of the handle shaft approximately coincides with the center of gravity of the device. and a drafting head in which the tip of the pen arm protrudes laterally with respect to the lower casing outside the manual motion range defined by the scale attachment portion and the extension line of the scale attachment portion.