CN2149294Y

CN2149294Y - Compass used for drawing lines on the surface of column

Info

Publication number: CN2149294Y
Application number: CN 93200060
Authority: CN
Inventors: 阎进峰
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-01-05
Filing date: 1993-01-05
Publication date: 1993-12-15
Anticipated expiration: 2003-01-05

Abstract

The utility model discloses compasses used for drawing the intersecting line of the column on the surface of the column, mainly comprising a handle, a centre support rod, a rotating rod, and a spring telescoping rod. When the utility model is used, after selecting the radius of the circle, the scriber of the spring telescoping rod stretches and shrinks from top to bottom with the curvature of the cylindrical surface, and the line drawn is the desired intersecting line of the two cylindrical surfaces intersected. The utility model is in particular suitable for drawing lines in construction and maintenance industry, having the advantages of simple structure, convenient operation, and low cost.

Description

Compass used for drawing lines on the surface of column

The utility model relate to a kind of on the face of cylinder compasses of (or arc surface) upper drawing circle post intersection.

(or arc surface) go up to install the pipe crossing intersection of the pipe and the face of cylinder (arc surface) that must draw earlier on the face of cylinder; Must labor intensive just can finish through calculating and numerous and diverse line for this reason.The at present external shape of a saddle cutting machine of producing adopts advanced Numeric Control Technology, can be more accurate make the intersection that intersect on the face of cylinder and the face of cylinder, but this equipment need special-purpose stand, move difficulty, the equipment investment height, if be used for the construction and installation industry, perforate operation aloft is inconvenience especially.Still find no the document announcement that closes intersection scoring tool simple in structure at present both at home and abroad.

The purpose of this utility model is a kind of simple and practical picture face of cylinder of design and the draw tool of face of cylinder intersection, to improve line efficient.

The utility model comprises handle, centre post (upper and lower) dwang, telescopic spring bar and be connected and fixed part such as part.Fixedly connected by screw thread in the upper end of handle and last centre post, link together by the upper end of bolt and nut under the handle centre post and dwang, the angle of dwang and centre post can arbitrarily be set according to radius size, and locking nut is fixed then; The end of dwang links together by bolt and nut and telescopic spring bar; The telescopic spring bar is parallel with centre post, the last rapids of the two is equipped with scriber, feature of the present utility model is, the telescopic spring bar is a tube-in-tube structure, it partly is made of inner sleeve, outer tube, coil tension spring etc., inner sleeve can slide up and down relatively with outer tube, and the upper end of spring is fixed on the fixing pin at inner sleeve middle part, and the lower end of spring is fixed on the bottom surface of outer tube.When using, on the face of cylinder, select the perforate center earlier.The scriber of compasses centre post lower end is inserted in the perforate central eye, the angle of selected center's support bar and dwang is tightened hold-down nut then, when compasses rotate, expansion link stretches along with the height on the face of cylinder, thus the intersection that the cylinder that draws on the face of cylinder intersects with it.

The utility model further describes by drawings and Examples.

Fig. 1 compasses front view

Fig. 2 compasses side view

1, handle 2, centre post (upper and lower) 3, nut 4, bolt 5, dwang

6, expansion link inner sleeve 7, spring 8, expansion link outer tube

Example:

As shown in the figure, compasses are by handle (1), centre post (upper and lower two sections) (2), dwang (5), telescopic spring bar and be connected and fixed part etc. and partly constitute, handle (1) is fixedlyed connected by screw thread with the upper end of last centre post (2), by bolt (4), nut (3) upper end of centre post (2) and dwang (5) is linked together under the handle (1), the angle of dwang (5) and centre post (2) can be selected arbitrarily according to drawn radius of graph size; The lower end of dwang (5) is connected by the upper end of bolt and nut with telescopic spring bar inner sleeve (6), the outer tube of expansion link (8) can slide up and down relatively with inner sleeve (6), the upper end of coil tension spring (7) is fixed on the middle part fixing pin of inner sleeve (6), and the lower end of spring (7) is fixed on the bottom surface of outer tube (8); The parallel installation of telescopic spring bar with centre post.

Claims

A kind of compasses of on the face of cylinder, drawing intersection, comprise handle, centre post, dwang and be connected and fixed part such as part, the upper end of handle (1) and centre post (2) is by being threaded, pass through bolt (4) under the handle, nut (3) links together the upper end of centre post (2) and dwang (5), the angle of dwang (5) and centre post (2) can be selected arbitrarily, it is characterized in that, the lower end of dwang (5) is by bolt (4), nut (3) is connected with the upper end of telescopic spring bar inner sleeve (6), the outer tube of expansion link (8) can slide up and down relatively with inner sleeve (6), the upper end of coil tension spring (7) is fixed on the middle part fixing pin of inner sleeve (6), and the lower end of spring (7) is fixed on the bottom surface of outer tube (8); The parallel installation of telescopic spring bar with centre post.