FR2589052A1

FR2589052A1 - Compact board for drawing geometrical and technical drawings of A4 format

Info

Publication number: FR2589052A1
Application number: FR8516172A
Authority: FR
Original assignee: Individual
Current assignee: Individual
Priority date: 1985-10-28
Filing date: 1985-10-28
Publication date: 1987-04-30

Abstract

Compact board for drawing geometrical and technical drawings of A4 format. The invention relates to a structure allowing: 1. Storage 1 of the board in a ring binder of current design. 2. Drawing, which can be carried out with the aid of a conventional single set square, resting and being guided on surfaces 2 to 6 raised with respect to the surface of the drawing sheet. 3. Assembling two similar boards making it possible to increase the drawing surface to the A3 format. The invention also relates to the accessories: For drawing, a ruler or setsquare (with complementary profile); For storage of the drawing equipment and for tilting the board. This board made from pressure-moulded plastic and its accessories according to the invention are intended in particular for carrying out geometric and technical drawings when transportation of the drawing equipment is necessary and frequent.

Description

La présente invention concern-e une planche à dessin permettant sous un faible encombrement et avec un minimum de matériel de tracer des dessins géométriques et techniques de for- mat À4;la possibilité de doubler cette surface;la possibilité d'utiliser un accessoire de tracé et un accessoire de rangement et d'inclinaison de la planche. The present invention relates to a drawing board allowing, under a small footprint and with a minimum of material, to draw geometric and technical drawings in A4 format; the possibility of doubling this surface; the possibility of using a drawing accessory and a board storage and tilting accessory.

Traditionnellement,le tracé des dessins techniques s'effec- tue à l'aide d'une planche et d'un té ou d'une règle parallèle spéciale dont les déplacements sont guidés soit par le bord de la planche,soit par des rainures. Traditionally, the drawing of technical drawings is carried out using a board and a tee or a special parallel ruler whose movements are guided either by the edge of the board or by grooves.

La structure du modèle de base selon l'invention est caractérisée par;
l):Des dimensions extérieures,longueur et largeur inférieures à 320x 240;des perrorations(I)de diamètre et d'entre-axes permettant la liaison avec un classeur à anneaux de modèle courant.The structure of the basic model according to the invention is characterized by;
l): External dimensions, length and width less than 320x 240; perforations (I) in diameter and in-between axes allowing connection with a ring binder of current model.

2)Des surfaces d'appui transversales(2)et une surface d'appui longitudinale en relief de quelques dixièmes de millimètres par rapport à la surface de tracé. 2) Transverse support surfaces (2) and a longitudinal support surface in relief of a few tenths of a millimeter relative to the tracing surface.

Des surfaces de guidage transversales(4)parallèles aux surfaces d'appui(2)et en relief de quelques dixièmes de millimètres par rapport à celle-ci. Transversal guide surfaces (4) parallel to the support surfaces (2) and in relief of a few tenths of a millimeter relative to the latter.

Une surface d'appui longitudinale(5)parallèle au grand coté de la feuilleet de meme hauteur que les surfaces de guidage transversales(4). A longitudinal bearing surface (5) parallel to the long side of the sheet and of the same height as the transverse guide surfaces (4).

TJne surface de guidage longitudinale(6)parallèle à la surface d'appui(5)et en relief de quelques dixièmes de millimètres par rapport à celle-ci. TJne longitudinal guide surface (6) parallel to the support surface (5) and in relief of a few tenths of a millimeter relative to the latter.

Selon une variante du modèle de base ci-dessus défini,la structure caractéri3ée det 2 )àÇ6)peut être reproduite sur chacune des grandes faces de la planche. According to a variant of the basic model defined above, the characterized structure det 2) to Ç6) can be reproduced on each of the large faces of the board.

Selon des variantes non représentées sur les figures oDintes,les structures définies de (2)à(6)peuvent être maté rialisées par des droites appartenant à diverses figures géométriques. According to variants not shown in the oDinte figures, the structures defined from (2) to (6) can be materialized by lines belonging to various geometrical figures.

3)La structure de base définie en(I)est complétée par des rainures et languettes(7)permettant l'assemblage de deux planches semblables. 3) The basic structure defined in (I) is completed by grooves and tongues (7) allowing the assembly of two similar boards.

4)Le premier accessoire est une équerre ou règle caractérisé par ltexistencesparallèlement à un petit coté et sur les deux faces,d'une rainure(8)au profil complémentaire à celui des surfaces de guidage(4). 4) The first accessory is a square or rule characterized by ltexistencesparallel to a small side and on both sides, a groove (8) with a profile complementary to that of the guide surfaces (4).

5)Le second accessoire est une pochette-support caracte- risée par des dimensions semblables aux dimensions de la plan che:largeur égale,longueur égale à la moitié au moins et à la totalité au plus de la longueur de la planche;par des perfo rations(I)permettant sa liaison avec un classeur à anneaux. 5) The second accessory is a support pouch characterized by dimensions similar to the dimensions of the board: equal width, length equal to at least half and at most the entire length of the board; rations (I) allowing its connection with a ring binder.

Ce second accessoire est caractérisé également par des éléments(9)permettant le rangement de l'outillage de tracé et par la possibilité de servir de support par emboîtement dans une rainure(IO)ou entre les surfaces(2)et (4)ou (5)et(6 ) de la planche afin de tenir celle-ci inclinée pendant le travail. This second accessory is also characterized by elements (9) allowing the storage of the drawing tool and by the possibility of serving as a support by fitting in a groove (IO) or between the surfaces (2) and (4) or ( 5) and (6) of the board in order to keep it inclined during work.

Le dessin annexe illustre l'invention selon un mode de réalisation préférentiel en plastique moulé sous pression. The accompanying drawing illustrates the invention according to a preferred embodiment in die-cast plastic.

-La figure I représente les dimensions extérieures de la planche,les perforations pour la liaison en classeur,la position des éléments(2)à(6). FIG. I represents the external dimensions of the board, the perforations for the connection in a binder, the position of the elements (2) to (6).

-La figure 2 représente une section A-A verticale de la planche illustrant la forme et la poaition relatives par rapport à la surface de tracé des surfaces d'appui et de guidage transversales(2) et(4)
ala figure 3 représente une section horizontale B-B de 18 planche illustrant la forme et la position relative par rapport à la surface de tracé des surfaces d'appui et de guidages lon itudinales.(3)(5)et(6). FIG. 2 represents a vertical section AA of the board illustrating the shape and the poaition relative to the tracing surface of the transverse support and guide surfaces (2) and (4)
ala Figure 3 shows a horizontal section BB of 18 board illustrating the shape and the relative position relative to the tracing surface of the support surfaces and lon itudinal guides. (3) (5) and (6).

-La figure 4 représente l'assemblage de deux planches semblables(7). FIG. 4 represents the assembly of two similar boards (7).

-La figure 5 représente le profil(8)d'une équerre ou rè gle parallèle. FIG. 5 represents the profile (8) of a square or parallel rule.

-les figures et 2 représentent l'aménagement type de la pochette de rangement et la rainure dans la planche lui permettant de jouer le rôle de support. -figures and 2 represent the typical arrangement of the storage pocket and the groove in the board allowing it to play the role of support.

Claims

Claims.

1) Compact drawing board whose structure is characterized by a rectangular shape whose dimensions are less than 320x240, perforations of diameter 6 and spacing 80 arranged parallel to a large side (I), a flat surface allowing fixing an A4 format sheet (297 x 2I0) bordered on the sides of support surfaces (2), (3) and (5) and guide surfaces (4) and (6) for plotting instruments.

2) The structure according to claim T is characterized in that the transverse bearing surfaces (2) and the longitudinal bearing surface (3) are raised by a few tenths of a millimeter relative to the fixing surface of the sheet to be traced.

3) The structure according to claims I and 2 is characterized in that the transverse guide surfaces (4) are parallel and in relief of a few tenths of a millimeter relative to the bearing surfaces (2).

4) The structure according to claims I and 3 is characterized in that the longitudinal bearing surface (5) is the same height as the guide surfaces (4).

5) The structure according to claim I and 4 is characterized in that the longitudinal guide surface 'o) is parallel and in relief of a few tenths of a millimeter relative to the longitudinal support surface (5).

6) The structure according to claim 1 is characterized in that a foundation (7) of the groove and tongue type disnosed along a large side allows the assembly of two similar boards.

7) Structure according to claims 3 and 5 characterized in that read of the grooves (8) hollow on both sides of a tra5ae-rule or square accessory and arranged sideways, 15 degrees and 30 degrees relative to a short side of this accessory, have a profile complementary to the profile of the guide surfaces (4) and (6).

8) Structure according to claim I characterizing an accessory for the storage of drawing instruments whose dimensions and perforations (9) will be equal to or similar to the dimensions and perforations of the drawing board.

9) Structure according to claims I and 8 characterizing a shape (IO) allowing the assembly of the storage accessory and the board to hold it inclined.

IO) Structure according to claims 2 to 5 characterized in that the defined firms can be reproduced on each face of / board.