CN2080911U

CN2080911U - Combined drawing rule

Info

Publication number: CN2080911U
Application number: CN 90214983
Authority: CN
Inventors: 段盛瑞
Original assignee: Individual
Current assignee: Duan Shengrui
Priority date: 1990-10-04
Filing date: 1990-10-04
Publication date: 1991-07-17

Abstract

The utility model discloses a combined drawing ruler for engineering drawing, comprising three main parts of a main ruler (1), a slider (3) and an auxiliary ruler (5). The main ruler is provided with a lengthwise guide track (2) in parallel with the upper edge of the ruler, wherein, the slider can move horizontally left and right on the guide track. The auxiliary ruler can rotate left and right around a mandrel (6) of the slider at an angle of 90 DEG and is provided with a horizontal movement and rotation positioning and locking device. The drawing ruler can be fixed with strings to draw on a drawing board like a straightedge, and besides, a wooden chart holder serves as a simple drawing instrument, so that the drawing ruler has the functions of the normal drawing instrument and low cost.

Description

Combined drawing rule

The utility model is a kind of engineering drawing instrument.

When carrying out engineering drawing, the main now two class instruments that adopt: a class is a separating tool, as parallel rule (or T-square), set square, protractor etc.; Another kind of is the draught machine that integrates separating tool, as the guide tracked draught machine of Shanghai Pufa, steel band type draught machine, guide rail parallel rule draught machine etc.With the inconvenience of separating tool mapping operation, drawing efficiency is low; Draw with draught machine, though easy to operate, because of its manufacturing cost height, price at more than thousand yuan to more than 2,000 yuan, be difficult to widespread usage.Omnipotent Bekaa chi has appearred on the market recently and since its push away parallel lines be subjected to the user with force and power thrusts and other all multifactor influence and precision is not high, more be not suitable for drawing the engineering drawing of large format.

The purpose of this utility model is to provide a kind of function that had both had general draught machine, and a kind of drawing instrument simple in structure, with low cost, that be easy to popularize.

The utility model is to add some annexes to realize in the conception of original parallel rule.Parallel rule (main scale) is provided with and the parallel longitudinal rail of last chi edge, and guide rail is provided with and can be provided with the chi of paying that can respectively rotate 90 ° about its axle axle center is done along its slide that vertically moves as linear reciprocation, slide.

Above-mentioned conception obviously is a kind of combination drawing tool that integrates parallel rule (or T-shaped), set square, protractor, if be fixed on the chart board with the fixing means that cotton rope adds pulley with present parallel rule, it can draw horizontal line and parallel lines, plumb line and parallel lines thereof, at any angle oblique line and parallel lines thereof, the vertical line of oblique line at any angle; Be the function that it has realized present draught machine, and than guide rail parallel rule draught machine can only draw ± 30 ° with interior oblique line and guide rail draught machine can only draw ± 80 ° of functions with interior oblique line enlarge to some extent.This combination drawing rule is if the method for making upper and lower translation with cotton rope with existing parallel rule adds that wooden chart board and wooden chart rack just are equivalent to an easy draught machine, the total price of its three is below 200 yuan, only be equivalent to 1/5 to 1/10 of existing draught machine price, or lower.

Fig. 1 is the front view of this combination drawing rule.

Fig. 2 is the A-A section of this combination drawing rule.

Fig. 3 is that the B-B of this combination drawing rule analyses and observe.

Main scale (1) upper limb has the metric system scale that is spaced apart 1 millimeter, and is provided with longitudinal rail (2), and guide rail is parallel with the main scale upper limb, and guide rail can be integral with main scale, also can be bonding with main scale.Slide (3) can be done left and right sides translation on main scale, and locks on the optional position in moving range with screw (4).Pay chi (5) about two chi edge be provided with the metric system scale that is spaced apart 1 millimeter, it can respectively pull 90 ° about with handle (9) around being fixed on axle (6) on the slide; And tighten fixing by screw-nut mechanism with handle (7).Slide is to be a disk at center with the axle axle center with the faying face of paying chi, be carved with 90 ° to 180 ° of 0 ° to 90 ° of red angle value and black angle values in the lower left of slide circle outer rim, when being in the plumb position, a pair chi on its last plane the red groove of a horizontal level and the black groove of a plumb position are arranged in conjunction with disk, when a pair chi is in 0 ° to the 90 ° scope, angle is by the red angle value indication of red groove indication, when being in 90 ° to the 180 ° scopes, pair chi, adds that with above-mentioned angle value 180 ° get final product for 180 ° to 360 ° angle values by the black angle value indication of black groove indication.In this drawing rule, the angle index value and can be measured angle only in 90 ° of scopes in 360 ° of scopes, and this is one of key character of the design.

In order to enlarge the function of this drawing rule, on pair chi, be provided with 1:2,1:3, four kinds of engineer's scales of 1:4,1:5, also being provided with two groups of spacings at the two ends of paying engineer's scale on the chi is 1 millimeter metric system scale, so that when drawing plumb line, determine the distance between plumb line.

More than be one of embodiment of this combination drawing rule, in addition, also have following several embodiments:

1. in the such scheme, realize that with cotton rope the method for upper and lower translation also can change Shanghai Pufa guide rail parallel rule draught machine is realized upper and lower translation with synchromesh gear mechanism scheme into existing parallel rule.Can expand the angular range that guide rail parallel rule draught machine is drawn oblique line with this kind method.

2. the angle rotating mechanism of this combination drawing rule also can adopt the transposition and the retaining mechanism of similar Pufa.

3. mainly conceive meeting the design, promptly on the parallel rule longitudinal rail is arranged, having on the guide rail has on slide and the slide on its axle is rotated ± 90 ° the basis of paying chi, also can adopt other organization plan to some detailed structure.

Claims

1, a kind of combination drawing rule, it is characterized in that main scale (1) is a parallel rule, the longitudinal rail parallel with the chi upper limb (2) arranged on the parallel rule, and slide (3) can be done left and right sides translation on guide rail, and slide is provided with pair chi (5) that can respectively rotate 90 ° around about its axle (6).

2, combination drawing rule according to claim 1 is characterized in that slide and the faying face of paying chi are a circular flat, is carved with 90 ° to 180 ° of 0 ° to 90 ° of red angle value and black angle values in 90 ° scope of the outer rim in the lower right corner of slide disk.

3, combination drawing rule according to claim 1 is characterized in that when a pair chi is in the plumb position, pay chi and be carved with two grooves that are mutually 90 ° with the last plane of paying the chi disk that combines disk of slide, its horizontal groove is red, the vertical groove is a black, or with other two kinds of different colors.