JPS6310320Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a drawing board for creating perspective drawings that can draw a large number of radial lines that intersect at a certain vanishing point when drawing a perspective drawing.

Prior Art Conventionally, the above-mentioned type of drawing board for creating perspective drawings is described in Japanese Patent Publication No. 52-7381, and as shown in FIG.
a, and a slide plate 211 movable in the horizontal direction in the drawing is fitted along the stepped portion 111a, and the drawing board 111 and the slide plate 211
Holes 31a to 31n, 21a to 21n are formed at positions corresponding to the vertices of various right triangles on the left and right ends of the drawing board 111 and the lower end of the slide plate 211, The holes 31a to 31n formed in the positions are vanishing points, and the holes 21a formed in the lower end of the slide plate 211
~21n position as a standing point, and each hole 31a~31
Although the configuration is such that a straight edge 311 is oscillated around n, 21a to 21n to draw radial lines to create a perspective view, the amount of movement of the slide plate 211 is limited within the drawing board 111. However, this method has the disadvantage that the drawing work becomes complicated and that a perspective view consisting of a vanishing point cannot be drawn.

Purpose of the invention The purpose of the present invention is to provide a drawing board for creating perspective drawings that can arbitrarily select the vanishing point and standing point position to draw a perspective drawing in view of the above-mentioned conventional drawbacks. .

Structure of the idea Hereinafter, the present invention will be explained according to examples.

Fig. 2 is a perspective view schematically showing a drawing board for creating perspective drawings according to the present invention, Fig. 3 is a schematic cross-sectional view taken along line A-A in Fig. 1, and Fig. 4 is a cross-sectional view taken along line B-B in Fig. 1. FIG. 5 is a plan view of the fulcrum metal fitting, and FIG. 6 is a plan view of the straightedge. In contrast, a locking groove 1b is formed into which an engaging portion 3 fixed to the upper end of the slide plate 2, which will be described later, is fitted. A large number of latitude scales 1c are written at predetermined pitches L at positions spaced a predetermined distance l1 from the upper and lower ends on the left and right sides of the drawing board 1.
Guide members 4 and 5 are fixed to the left and right ends of the guide members 4 and 5, on which a fulcrum metal fitting 3, which will be described later, is mounted so as to be movable in the vertical direction.

The sliding plate 2 has a horizontal width b that is narrower than the horizontal width a of the drawing board 1, and a convex engaging portion 3 is fixed to the upper edge of the drawing board 1 by fitting into the locking groove 1b. A large number of latitude lines 2a corresponding to the latitude line scale 1c written on the drawing board 1 are written on the board surface thereof so as to be movable in the left and right direction. Further, guide members 6 to 8 are fixed to the left and right ends and the lower end of the slide plate 2, to which a fulcrum metal fitting 3, which will be described later, is movably mounted.

The guide members 4, 5, 6 to 8 have a C-shaped cross section, and are fixed to the left and right side surfaces of the drawing board 1, as well as the left and right side surfaces, and the top and bottom sides of the slide plate 2, by screws or the like.

The fulcrum metal fitting 3 is integrally formed with a locking part 9a that fits into the guide members 4.5, 6 to 8, has a thickness that is flush with the drawing board 1 and the slide plate 2, and has a cross section that is substantially reversed. an L-shaped slide member 9; a guide member 4.5 screwed onto the slide member 9;
A shaft 11 is fixed to a fixed screw 10 whose tips are pressed into contact with the shafts 6 to 8 at a position spaced a predetermined width α from the ends of the drawing board 1 and the slide board 2, and is swung around the shaft 11. , a locking protrusion 12a at the end
The swinging member 12 has:

The straightedge 13 has a tapered drawn portion 13a on the extension line of the center position of the shaft 11, and the drawn portion 13a has a tapered shape.
a notch 13b to which the shaft 11 is locked;
is formed, and has an elongated shape with an appropriate width extending to the shaft 11 and the locking convex portion 12a. The predetermined width α is the difference between the predetermined pitch L and the predetermined distance l1. Further, the horizontal width b of the slide board 2 is equal to or more than 1/2 of the horizontal width a of the drawing board 1, and the slide board 2 is moved leftward or rightward on the drawing board 1 corresponding to the slide board 2, The latitude line 2a located at the top position of the slide board 2 is defined as the screen PP1, and the screen is extended at angles of 60° and 30° from positions separated by a predetermined width α from the left and right ends of the drawing board 1 corresponding to the screen PP1. If the extension line to be drawn is perpendicular to the lower end of the slide plate 2 at a position separated by the predetermined width α as the standing point SP1, then the predetermined width x (x=
ba/2. ) Align the scale S at the separated position,
Also, on the slide plate 2 corresponding to the alignment scale S are the respective screens and the coordinates 60°-30°- representing the angle of view.
A large number of coordinates corresponding to various right triangles that are assumed to extend from each screen PP1 to PPn corresponding to each latitude line scale 1c are written on the left and right edges of the drawing board 1, as well as the slide board 2. The upper and lower edges, left and right edges of the image are written in advance.

Next, the procedure for creating a perspective view will be explained with reference to FIG.

Based on the coordinates written on the drawing board 1 and the slide board 2, for example, a standing point as the vertex of a right triangle that is assumed to correspond to the screen PP3 and the angle of view of 60°.
After determining SP3 and positioning the shaft 11 of the fulcrum metal fitting 3 fitted to the guide member 4.5 against the lower edge of the slide plate 2 at the vertical point SP3, the fulcrum metal fitting 3 is fixed with the fixing screw 10. do.

When creating a perspective view of the object to be viewed through the plane view 4 corresponding to the screen above the drawing board 1, the base point BP (the viewing angle located below the drawing board 1) is, for example, the same size. , are arranged so as to be located on the screen PP3.

Then, the drawing paper 15 is placed on the slide plate 2, and the shaft 11 is aligned with the notch 13b formed in the straightedge 13 with respect to the swinging member 12 of the fulcrum fitting 3 located at the standing point SP3. After attaching the ruler 13, a leader line 16 is drawn that connects the standing point SP3 to each position on the plan view 14 and intersects the screen PP3. Then, perpendicular lines VL1 to VLn are drawn from the intersections a1 to an of the leader line 16 and the screen PP3 using a T-square (not shown) or the like.

Next, after drawing a horizontal line HL whose eye level is the latitude line 2a at an appropriate position written on the slide board 2, the fulcrum metal fittings 3 are moved to the left and right edge positions of the drawing board 1 corresponding to the horizontal line HL. At the same time, the fulcrum metal fitting 3 is fixed at this position with the fixing screw 10.

After drawing a reference line GL parallel to the horizontal line HL on the drawing paper 15, a side view 17 indicating the floor height, window height, and each reference height of the object to be viewed is placed from the reference line GL, and the drawing is Lead lines 18 are drawn on the paper 15 using a T-square or the like, parallel to the reference line GL, from positions b1 to bn indicating the respective heights of the object to be viewed.

Next, the straightedge 13 is attached to the swinging member 12 with the shaft 11 and the notch 13b aligned with the fulcrum fittings 3 fixed to the left and right ends of the drawing board 1 corresponding to the horizontal line HL, and the shaft Vanishing point 11 VP1/VP2
Then, a perspective view is created by swinging a straightedge around the vanishing points VP1 and VP2 and drawing a radial line RL.

Therefore, in this embodiment, the fulcrum fitting 3, which has the shaft 11 fixed at a position separated by a predetermined width α, from the guide members 4, 5, 6 to 8 fixed to the drawing board 1 and the slide plate 2 can be moved. The vanishing point VP1 is located outside of the drawing board 1 and slide board 2 due to the mounting configuration.
It is possible to draw a radial line RL centering on VP2 and the standing point SP, and the drawing procedure can be made smoother compared to a conventional drawing board in which a vanishing point and a standing point are set within the board.

In addition, as shown in FIGS. 8 to 13, the present invention moves the slide board in the left and right directions in the drawing corresponding to each screen and angle of view, and also moves the drawing board and/or the left and right sides of the slide board. It is also possible to draw a perspective view by moving the fulcrum fitting up and down in the drawing on a guide member fixed to the end, and in this case, the coordinates corresponding to each screen and angle of view can be plotted on the drawing board.
By writing on the slide plate, the position of the standing point can be easily determined.

In addition, the present invention has a configuration in which the slide plate is movably attached to the drawing board, in which a concave portion or a convex portion is formed in the left-right direction with respect to the stepped surface of the drawing board, and the slide plate is configured to correspond to the concave portion or convex portion. It is also possible to implement a configuration in which a convex portion or a concave portion is formed on the back surface.

Furthermore, when creating a perspective view of the far vanishing point, as shown in Figure 14, a part of the slide plate is pulled out from the drawing board to the side, and radial lines are drawn on the drawing paper placed on the slide plate. It is also possible to create a perspective view.

Effects of the Invention As explained above, the present invention includes a drawing board in which a stepped portion is formed at the bottom and a large number of latitude scales are written at predetermined pitches at least at a predetermined distance from the upper and lower ends, and the stepped portion In contrast, a slide plate that is movably attached flush with the drawing board and has latitude lines corresponding to at least the latitude line scale written on it, a side end surface of the drawing board, and a side end surface of the slide board; and a guide member fixed to the lower end surface so as to be movable in the vertical direction of the drawing board, the vertical direction of the slide board, and the horizontal direction, and the predetermined pitch and the predetermined distance from the ends of the drawing board and the slide board. a swinging member having a shaft fixed at a position separated by a predetermined width consisting of a difference between It consists of a straightedge that can be detachably attached in the state, and the straightedge can be swung around the axis to draw radial lines.The vanishing point and the standing point position can be arbitrarily selected. This is a drawing board for creating perspective drawings that allows you to draw perspective drawings.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a conventional example, and FIG. 2 is a perspective view schematically showing a drawing board for creating perspective drawings according to the present invention.
Figure 3 is a schematic sectional view taken along line A-A in Figure 1, Figure 4 is a sectional view taken along line B-B in Figure 1, Figure 5 is a plan view of the fulcrum fitting, and Figure 6 is a plan view of the straight edge. , FIG. 7 is an explanatory view showing the drawing state of a perspective view, and FIGS. 8 to 14 are explanatory views showing modified embodiments of the present invention. In the figures, 1 is a drawing board, 1a is a stepped portion, and 1c is the latitude line scale, 2 is the slide plate, 2a is the latitude line, 4, 5, 6 ~
8 is a guide member, 11 is a shaft, 12 is a swinging member, 1
3 is a straight edge, 13a is a line drawing part, and RL1 to RLn are radial lines.

Claims (1)

[Claims for Utility Model Registration] A drawing board having a stepped portion formed on the lower side and having a large number of latitude scales written at predetermined pitches at least a predetermined distance from the upper and lower ends, and for the stepped portion, a slide plate movably attached flush with the drawing board and on which at least latitude lines corresponding to the latitude scale are written; a side end surface of the drawing board; and a side end surface of the slide board;
and a guide member fixed to the lower end surface so as to be movable in the vertical direction of the drawing board, the vertical direction of the slide board, and the horizontal direction, and the predetermined pitch and the predetermined distance from the ends of the drawing board and the slide board. The shaft is fixed at a position separated by a predetermined width consisting of the difference between
a swinging member that swings about the shaft; and a straightedge that is removably attached to the swinging member with a line drawn portion aligned with the axis of the shaft; A drawing board for creating perspective drawings, characterized in that it is possible to draw radial lines and draw perspective drawings using a straightedge that is oscillated around the center.