CN2121346U

CN2121346U - Drafting ruler

Info

Publication number: CN2121346U
Application number: CN 92222898
Authority: CN
Inventors: 冯海军
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-05-29
Filing date: 1992-05-29
Publication date: 1992-11-11

Abstract

The utility model belongs to a drawing tool, namely a new straightedge for drawing which is improved based on the existing straightedge. A straightedge is additionally provided with a pulley, and the straightedge body is provided with a slide groove whose surface is marked with corresponding proportion graduations. The slide groove is provided with a slide ruler which can slide. Thus, without a scale and a divider, the utility model can quickly, conveniently, flexibly and directly draw a horizontal line segment according to the design requirements, shortening the drawing time, and enhancing the work efficiency.

Description

Drafting ruler

The utility model belongs to drawing appliance, the parallel rule of the usefulness that is specifically related to draw.

What draw often appearance is horizontal line section and vertical line segment, at present, realizes that these two kinds of used rulers of line segments drawing have T-square, parallel rule, set square etc.Parallel rule is fixed on the draughting board, according to the principle of the parallel lines parallel mobile parallel rule line segment of upper and lower two levels that just can draw up and down.Determine the distance of upper and lower two horizontal line sections according to designing requirement, will be with the engineer's scale amount of going, or the branch predetermined bits of the good distance of consumption, promote parallel rule again to anchor point, so just can draw second, third ... Deng the bar parallel lines, this way, operating performance is loaded down with trivial details, and drawing efficiency is low.

The purpose of invention of the present utility model provides a kind of novel parallel rule, with this kind parallel rule directly just can draw by the numerical value of designing requirement second, third ... Deng the bar horizontal line section.

The purpose of this utility model is achieved in that on existing parallel rule, have chute, detent surface indicates multiple ratio and corresponding scale graduation thereof, chute is provided with the slide rule that can slide in chute, respectively there is a projection at the slide rule two ends, the reading index line is arranged on the slide rule, by the original pulley of blade one end, install additional again and fix a pulley that has double-deck guide groove, flexible drive removes in the guide groove of parallel rule two head sheaves, also in the pulley guide groove that installs additional and on the projection at slide rule two ends, the two ends of flexible body are separately fixed at the both sides of drawing board.Mobile parallel rule, slide rule move under the drive of flexible drive thereupon, and the distance that the reading index line on the slide rule moves horizontally is exactly the distance that parallel rule moves up and down.At this moment, just can be directly with the parallel rule second horizontal line section that on drawing, draws, the rest may be inferred, the 3rd, the 4th ... horizontal line section has just drawn.

The novel drawing parallel rule that uses the utility model to manufacture without drawing instruments such as engineer's scale or dividers, just can be realized fast, easily and flexibly according to the design value requirement, directly draws horizontal line section, has shortened the drawing time, has improved work efficiency.

Description of drawings is as follows:

Accompanying drawing one: novel drawing parallel rule

Accompanying drawing two: 1-1 chute sectional drawing

Accompanying drawing three: 1-1 slide rule sectional drawing

Accompanying drawing four: detent surface ratio and scale graduation figure

Accompanying drawing five: slide rule surface ratio and window figure

Embodiment one:

Below in conjunction with embodiment and accompanying drawing, the utility model will be further described:

Shown in figure one, the one meter long parallel rule that transparent organic glass is made, form by the blade that indicates scale graduation (1), two pulleys (2) that have double-deck guide groove that are fixed on the blade two ends and the nylon rope (3) in parallel rule two head sheave guide grooves, on the blade of this parallel rule, have chute (4) chute section shown in figure two.Detent surface indicates multiple engineer's scale and corresponding scale graduation thereof, shown in accompanying drawing four.Chute is provided with the slide rule (5) that can slide in chute, the slide rule section is shown in accompanying drawing three.Respectively there is a projection (6) at the slide rule two ends.The window that reading index line, ratio and displaying ratio numerical value are arranged on the slide rule is shown in accompanying drawing five.Original pulley (2) at blade one end is other, installs additional and fixes a pulley (7) that has double-deck guide groove.Nylon rope removes in the guide groove of parallel rule two head sheaves, also in the pulley guide groove that installs additional and on the projection (6) at slide rule two ends, forms a kind of novel drawing parallel rule thus.

Flexible drive can use solid materials such as nylon rope, silk rope, fillet silk ribbon to make, and slide rule and parallel rule body all select for use transparent organic glass to make, and pulley can be used lucite, also can select for use good brass of wearability or stainless steel to make.

Claims

1, a kind of novel drawing parallel rule, by the blade that indicates scale graduation, be fixed on two pulleys that have double-deck guide groove at blade two ends, and the flexible drive in parallel rule two head sheave guide grooves is formed, it is characterized in that: indicating on the blade of ratio, have chute, detent surface indicates multiple ratio and corresponding scale graduation thereof, chute is provided with the slide rule that can slide in chute, respectively there is a projection at the slide rule two ends, the reading index line is arranged on the slide rule, by the original pulley of blade one end, install additional again and fix a pulley that has double-deck guide groove, flexible drive removes in the guide groove of parallel rule two head sheaves, also around install additional in the pulley guide groove and the projection at slide rule two ends on, formed a kind of novel drawing parallel rule thus.

2, a kind of novel drawing parallel rule according to claim 1 is characterized in that: slide rule bottom surface or surface indicate the window of ratio and displaying ratio scale numerical value.