SU1107152A1 - Teaching-aid apparatus on drawing - Google Patents

Abstract

An educational device for drawing, which contains three mutually perpendicularly arranged plates, imitating projection planes, a spring-loaded writing element and a bypass pointer associated with it, characterized in that, in order to improve the orthogonal projections, it has a carriage mounted on one of the plates a slot, a vertical bar placed in the slots and an U-bracket rigidly connected to it with one end, the writing element being mounted on the free end of the bracket, and the pointer around the edge e bracket connected to the strap, coaxially writing element. listened to u

Description

The invention relates to teaching aids to demonstrate the construction of orthogonal projections and can be used in the educational process. A training device for drawing is known, which contains three mutually perpendicularly arranged plates imitating projection planes, a spring-loaded writing element and a bypass pointer 1 associated with it. The known device does not provide sufficient cohesiveness of orthogonal projections because the projection link of the portrayed image is not necessary object with a bypass pointer and pishun: |, them element. The aim of the invention is to reinforce the implicit construction of orthogonal projections. In order to achieve the set, the training device was sang in drawing, containing three mutually perpendicularly arranged plates, imitating projection planes, a spring-loaded writing element and a bypass pointer connected to it, has a slotted carriage on it, a vertical pad placed in the slot and a rigid The U-shaped bracket with one end connected to it, with a pipshi element mounted on the free end of the bracket, and a pointer around the brace at the end of the bracket connected to the bar coaxially writing the element. FIG. 1 shows the proposed device, a general view; in fig. 2 is a section A-A in FIG. one; in fig. 3 - bypass pointer with a tip; in fig. 4 - Kronshteyn. The device has three plates 1-.3 arranged mutually perpendicularly, imitating the planes of projections, the plates are connected pivotally with the possibility of turning into one plane. At the edges, plates 1 and 2 have slots 4-6. In one of the slots there is a vertical bar 7, with which one end is fastened - U-shaped bracket 8, on the same end of bracket 8 a pointer bypass 9 is installed with the help of sleeve 10. At the free end of bracket 8 a spring-loaded writing element 11 is installed coaxially with pointer 9 The slider carriage 12, in which nlanka 7 is installed, has rollers 13, stoppers 14 and 15, and clamps 16 for pressing the strip 7. Stand 17 serves to set up object 18, the orthogonal projections of which are drawn by the device, this stand is mounted on plate 2 by 19 racks. To stroke the edges of the object device. has a removable tip 20 for a by-pass pointer 9. A thread 21 passed through rings 22 attached to the arm 8 connects the food element 11 with the stop 23 with a slit. In order to fix the food element 11 in the detached position, a fixing element 24 is fixed at the end of the thread 21, the dimensions of which exceed the width of the slot of the stop 23. The device works as follows. The object 18 is placed on the stand 17 and the end of the pointer 9 surrounds its contours, respectively, moving the bracket 8 with the bar 7 into the slot along with the carriage 12. At this time, the food element 11 draws a projection of this contour on the corresponding projection plane. When drawing out the contours of an object that are parallel or perpendicular to any of the three projection planes, use stops 14 and 15, which make it possible to get even straight lines. So, if the lock-up stop 14 is used, it is possible to draw straight lines in one direction, and in order to draw the projections of the object’s contours perpendicular to these lines, you need to fix the stop 15. In case you need to move from one loop to another lying on another plane, The pressing element 14 is pulled away from the drawing with the help of the thread 21. After the drawing of one projection is completed, the carriage 12 together with the strip 7 is moved to another slot, for example a slot 5, and another drawing is drawn. Drawing each of the three projections by enclosing the respective sides of the object 18 provides a detailed demonstration of the student’s learning of each of the three types. The proposed device will improve the efficiency of the educational process by increasing its intensity.

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Claims (1)

A drafting training device containing three mutually perpendicular plates simulating projection planes, a spring-loaded writing element and an associated bypass pointer, characterized in that, in order to increase the visibility of constructing orthogonal projections, it has a carriage with a slot mounted on one of the plates a vertical bar placed in the slot and rigidly connected at one end by a U-shaped bracket, while the writing element is mounted on the free end of the bracket, and the bypass pointer is on the end of the arm nstein, connected to the bar, coaxially to the writing element.