JPH0473597U

JPH0473597U -

Info

Publication number: JPH0473597U
Application number: JP11638990U
Authority: JP
Priority date: 1990-11-06
Filing date: 1990-11-06
Publication date: 1992-06-29
Anticipated expiration: 2005-08-30
Also published as: JPH0737917Y2

Description

[Brief explanation of drawings]

図は本考案の一実施例を示し、第１図は製図ヘ
ツドの縦断正面図、第２図は支持板の斜視図、第
３図は回り止め座金、ブレーキ取付板及びハンド
ル軸の分解斜視図、第４図はブレーキ取付板の底
面斜視図、第５図は切起こし片と係合孔の作用を
示す要部断面図、第６図は同作用を示すブレーキ
取付板と回り止め座金の平面図である。２０……製図ヘツド、２３……スケール取付板
、２４……ハンドル軸、２８……支持板、３２…
…回り止め部、３３……ブレーキデイスク、３４
……ブレーキ取付板、３５……回り止め座金、３
７……ナツト、６０……係合孔、６１……切起こ
し爪、６２……傾斜面、６３……縁部、６５，６
６……中心孔。 The figures show one embodiment of the present invention, in which Fig. 1 is a longitudinal sectional front view of the drafting head, Fig. 2 is a perspective view of the support plate, and Fig. 3 is an exploded perspective view of the detent washer, brake mounting plate, and handle shaft. , Fig. 4 is a bottom perspective view of the brake mounting plate, Fig. 5 is a sectional view of the main part showing the action of the cut-and-raise piece and the engagement hole, and Fig. 6 is a plan view of the brake mounting plate and the anti-rotation washer showing the same action. It is a diagram. 20... Drafting head, 23... Scale mounting plate, 24... Handle shaft, 28... Support plate, 32...
...Stopping portion, 33...Brake disc, 34
... Brake mounting plate, 35 ... Non-rotating washer, 3
7... Nut, 60... Engaging hole, 61... Cut-and-raise claw, 62... Inclined surface, 63... Edge, 65, 6
6...Central hole.

Claims

[Scope of utility model registration request]

The handle shaft 24 is loosely fitted into the center hole of a support plate 28 connected to the arm or carriage of the drawing machine 20, and the brake mounting plate 34 fixed to the handle shaft 24 and the support plate 28 can be freely pressed together via a brake device. The drawing head 20 is configured such that the scale mounting plate 23 fixed to the lower part of the handle shaft 24 can be fixed to the support plate 28 at an arbitrary angle, and the upper side surface of the handle shaft 24 is machined by cutting, etc. to form the detent part 32 with a non-circular cross-sectional shape, and then drill center holes 65, 66 that match the cross-sectional shape in the brake mounting plate 34 and detent washer 35, and insert the detent part 32 loosely. At the same time, a cut-and-raise pawl 61 having an inclined surface in the direction of rotation of the handle shaft 24 is provided on one surface of the anti-rotation washer 35, and the brake mounting plate 34
An engagement hole 60 corresponding to the cut-and-raise claw 61 is provided on one surface, and the engagement hole 60 and the cut-and-raise claw 61 are connected to each other.
When the brake mounting plate 34 and the anti-rotation washer 35 are tightened with the nut 37,
The inclined surface 62 of the cut-and-raise pawl 61 presses the edge 63 of the engagement hole 60, applying rotational force in opposite directions to the brake mounting plate 34 and the anti-rotation washer 35, respectively, thereby pinching the anti-rotation portion 32. A brake fixing device for a drafting head, characterized in that it is formed so as to apply pressure.