JPS588558Y2 - Drafting machine for drawing radiation - Google Patents

Description

[Detailed Description of the Invention] This invention mainly relates to a drawing machine for drawing rays required when creating perspective drawings.

The radiation required for drawing is generally obtained by finding predetermined points using a protractor or calculation, and then drawing lines at those points with a long straightedge, but such a method takes too much effort and time.

Recently, a drafting machine has been proposed in which a scale is attached to the extension of one link of a parallel link mechanism placed near the protractor, so that radiation can be drawn using the scale. However, this type of drawing machine had the disadvantage that it was not possible to draw radiation over the entire drawing, requiring additional lines, and that the operation for determining the vanishing point position of the radiation was somewhat complicated. .

This idea was made in view of the above points, and is easy to operate, and it is easy to use as the rays can be drawn over the entire drawing, and it can draw rays that can improve the efficiency of various drawings that require rays, including perspective drawings. The purpose is to provide a drafting machine.

Examples of this invention will be described below based on the drawings.

On the back side of the drawing board 1, vertical guide rails 2, 2 are arranged in parallel on both sides, and a horizontal rod 3 is attached via a guide tool 4.4 so as to be vertically movable along both guide rails 2.2. , each guide tool 4, 4 is equipped with a fixing mechanism 5, 5 for fixing the horizontal rod 3 at a predetermined position.

At least one end of the horizontal rod 3 is made to protrude to the side of the drawing plate 1 so that it can move up and down from the front side of the drawing plate 1.

The corners of a pair of L-shaped parallel arms 6.6 are pivotally connected to the horizontal rod 3 at intervals, and the short side ends of each arm 6.6 are rotatably connected by a connecting rod 7 to form a parallel link. form.

Note that the parallel arms 6.6 are not particularly limited to L-shaped arms as long as they each have one end pivotally connected to the horizontal rod 3 to form a parallel link.

a first sliding tool 8 sliding along the long side of each arm 6.6;
8 are arranged, and a second sliding tool 9 is rotatably attached on each of the first sliding tools 8.

Each of the first sliding tools 8 is equipped with an individualization mechanism 10 at a predetermined position on the arm 6, and both this fixing mechanism 10 and the above-mentioned fixing mechanism 5 can be remotely operated from outside the drawing plate 1. Let's do it like this.

The structure of the fixing mechanisms 5 and 10 may be, for example, a shutter release of a camera.

Then, the main rod 11 whose ends protrude from both sides of the drawing board 1 is inserted into the second sliding tools 9, 9 in series, so that the main rod 11 and the second sliding tool 9 can slide freely relative to each other. .

12 is a stop roller protruding from the upper end of the L-shaped arm 6;
13 and 14 are stoppers fixed to the upper and lower ends of the back surface of the drawing plate 1, and the stop roller 12 is connected to the stopper 1.
3.14 to restrict the operation of the L-shaped arm 6.

Reference numeral 15 designates attachment parts for a back cover (not shown) which protrude from the four corners of the back surface of the drawing plate 1.

Reference numeral 16 denotes a scale arranged on the surface of the drawing board 1, which has the same length as the main rod 11.

Then, vertical guide rails 1 are placed along both sides of the drawing board 1.
7 and 17 are arranged in parallel, a guide tool 18 that slides along each guide rail 17 is arranged, and a sliding tool 19 is rotatably mounted on each guide tool 18, so that the scale 16
are inserted into the sliding tools 19, 19 in series.

Further, both ends of the scale 16 are connected to both ends of the main rod 11 via a coupling tool 20 so as to be movable together.

The drawing machine is constructed in this manner. Next, the manner of use of the above embodiment will be explained.

First, after attaching the drawing to the drawing plate 1, move the horizontal rod 3 vertically along the vertical guide rail 2 to a position corresponding to the horizontal line you want to find on the drawing, and fix it by operating the fixing mechanism 5. Then, a horizontal line H1L is drawn on the drawing along the horizontal rod 3 using a scale 16 or a T-shaped ruler.

Here, when the scale 16 is tilted at a predetermined position at a predetermined angle (for example, when creating a perspective view, the horizontal line H,
A pair of parallel arms 6.6 on the back side rotate and at the same time,
Since the first sliding tools 8 and 8 also slide following the main rod 11,
The fixing mechanism 10 is operated and fixed at the stop position.

In this case, if the distances between both ends of the scale 16 with respect to the horizontal lines H and L are x and y, respectively, all that is left is to move one end of the scale 16 up and down, and the other end is moved at the same ratio (x: y=
Move with x': y').

That is, the scale 16 indicates a ray based on the vanishing point on the horizontal lines H and L found first or on an extension thereof at an arbitrary position on the drawing.

As explained above, in the drawing machine of this invention, the scale on the surface of the drawing plate is activated by following the swinging of a pair of parallel arms constituting parallel links arranged on the back side of the drawing plate, and the scale is Since we have shown a ray centered on a predetermined vanishing point at an arbitrary position above, it is convenient to be able to draw the desired ray over the entire drawing just by operating the scale. When creating drawings, especially perspective drawings, it not only improves the efficiency, but also determines the position of the horizontal lines H and L, in other words, the position of the horizontal rod 3, and one of the necessary radiation, in other words. All you need to do is determine the inclination of the scale 16 with respect to the pair of parallel arms 6.6 and operate the fixing mechanisms 5 and 10. Parallel link mechanisms etc. are provided on the back of the drawing board, so you can use them when drawing. It is very easy to use because the mechanism does not get in the way.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is a perspective view seen from the front, FIG. 2 is a perspective view seen from the back, and FIG. 3 is a diagram illustrating the principle. 1... Drawing board, 2... Vertical guide rail, 3... Horizontal rod, 4... Guide tool, 5
....Fixing mechanism, 6..L-shaped parallel arm, 7..Connection rod, 8..First sliding tool,
9...Second sliding tool, 10...Fixing mechanism, 11...Main rod, 12...Stop roller, 13... Stopper, 14...
Stopper, 15...Back cover mounting part, 16...
... Scale, 17 ... Vertical guide rail, 18 ... Guide tool, 19 ... Sliding tool,
20...Connector.

Claims (1)

[Scope of utility model registration request] One end of a pair of parallel arms 6.6 constituting a parallel link is pivotally connected to a horizontal rod 3 with a fixing mechanism 5 which is arranged vertically movably on the back side of the drawing plate 1, The second sliding tool 9 is rotatably attached to the first sliding tool 8, 8 with the fixing mechanism 10, which is slidably arranged on the drawing plate 1.
The main rod 11 whose ends protrude from both sides of the second sliding tool 9,
9, and both ends of a scale 16 placed on the surface of the drawing plate 1 are connected to both ends of the main rod 11 so as to be movable together.