JPH021585U

JPH021585U -

Info

Publication number: JPH021585U
Application number: JP7691288U
Authority: JP
Priority date: 1988-06-09
Filing date: 1988-06-09
Publication date: 1990-01-08
Anticipated expiration: 2003-06-09
Also published as: JPH077037Y2

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示す要部断面図、
第２図は枠組み一例を示す平面図、第３図は従来
の枠骨曲がり防止治具を示す斜視図である。図において、１は回動用ハンドル、２はスパン
調整筒、２ａは左ねじ部、２ｂは右ねじ部、２ｃ
は貫通孔、３は第１支持部材、３ａは左ねじ部、
４は第２支持部材、４ａは右ねじ部、５，６は係
合部、Ｌは係合部５と係合部６間距離、７ａは枠
組の垂直枠骨をそれぞれ示す。 FIG. 1 is a cross-sectional view of essential parts showing an embodiment of the present invention;
FIG. 2 is a plan view showing an example of a frame, and FIG. 3 is a perspective view showing a conventional frame bone bending prevention jig. In the figure, 1 is a rotating handle, 2 is a span adjustment tube, 2a is a left-hand threaded part, 2b is a right-hand threaded part, 2c
3 is a through hole, 3 is a first support member, 3a is a left-handed threaded portion,
4 is a second support member, 4a is a right-handed threaded portion, 5 and 6 are engaging portions, L is a distance between engaging portions 5 and 6, and 7a is a vertical frame of the framework.

Claims

[Claims for Utility Model Registration] A jig for preventing bending of a frame bone used during welding for joining the frame bones of a frame 7 formed by combining at least four frame ribs 7a and 7b, which has a center portion for rotation. A left-handed threaded portion 2a is attached to one end of the cylinder to which the handle 1 is attached, and a right-handed threaded portion 2b is attached to the other end.
The span adjustment tubes 2 provided respectively are provided so as to be movable in the axial direction of the adjustment tubes by being screwed together with the left-hand threaded portion 2a of the span adjustment tubes 2, and the frame of the framework 7 is provided at the end. a first support member 3 provided with an engaging portion 5 for the bone 7a; and a first support member 3 provided with a right-hand threaded portion 2b of the span adjustment tube 2 so as to be movable in the axial direction of the adjustment tube; a second support member 4 having an engagement portion 6 for the frame rib 7b of the framework 7 at the end thereof, and by rotating the span adjustment cylinder 2 with the rotation handle 1, the first and second supports are A frame characterized in that the distance between the engaging parts 5 and 6 of the member 4 is expanded or contracted to define the interval between two frame ribs 7a facing each other when the framework 7 is welded. Jig to prevent bone bending.