JPH02138680U

JPH02138680U -

Info

Publication number: JPH02138680U
Application number: JP4628689U
Authority: JP
Priority date: 1989-04-21
Filing date: 1989-04-21
Publication date: 1990-11-20

Description

[Brief explanation of drawings]

図面は本考案の実施例に係り、第１図は本考案
の回転糸案内装置を組み込んだミシンの外観図、
第２図は回転糸案内を装着した糸調子台の一部断
面図、第３図はその右側面図、第４図は回転糸案
内の説明図、第５図は糸調子台の左側面図、第６
図は上糸案内板の斜視図、第７図は糸取りバネの
取り付け状態説明図、第８図は従来の糸案内によ
る上糸張力測定結果の張力変動説明図、第９図は
上糸が不足状態の上下糸交差状態の説明図、第１
０図は上糸が過剰状態の上下糸交差状態の説明図
、第１１図は本発明の回転糸案内による上糸張力
測定結果の張力変動説明図であり、５……上糸供給源の糸コマ、３……針、１……
ミシン機枠、８……上糸調子器、４……天秤、９
……糸案内である。 The drawings relate to embodiments of the present invention; FIG. 1 is an external view of a sewing machine incorporating the rotary thread guide device of the present invention;
Figure 2 is a partial cross-sectional view of the thread tension block equipped with a rotating thread guide, Figure 3 is its right side view, Figure 4 is an explanatory diagram of the rotating thread guide, and Figure 5 is a left side view of the thread tension block. , 6th
The figure is a perspective view of the needle thread guide plate, Figure 7 is an explanatory diagram of the installation state of the thread take-up spring, Figure 8 is an explanatory diagram of tension fluctuations as a result of needle thread tension measurement using a conventional thread guide, and Figure 9 is an illustration of insufficient needle thread. An explanatory diagram of the state where the upper and lower threads intersect, 1st
Fig. 0 is an explanatory diagram of a state in which the upper and lower threads intersect when the upper thread is in excess, and Fig. 11 is an explanatory diagram of tension fluctuations as a result of measuring the upper thread tension using the rotating thread guide of the present invention. Top, 3... Needle, 1...
Sewing machine frame, 8... Upper thread tension device, 4... Take-up lever, 9
...It is a thread guide.

Claims

[Claims for Utility Model Registration] (1) An upper thread tension device disposed above the sewing machine frame between the needle thread supply source and the needle; A sewing machine comprising: a thread take-up that moves up and down in synchronization with the up-and-down movement of the sewing machine; and a thread guide disposed below the sewing machine frame between the thread take-up and the upper thread tension device. A rotary thread guide for a sewing machine, which is rotatably supported by a frame and has wedge-shaped thread guide grooves formed on its outer periphery to allow threads of different thicknesses to be held therein. (2) The rotary thread guide is formed of a thread guide rotatably fitted onto a guide shaft fixed to the sewing machine frame, and a thread guide plate integrally fixed to the thread guide. A rotating thread guide for a sewing machine, characterized in that the guide groove is a wedge-shaped thread guide groove formed by an inclined surface formed on at least one of the thread guide body and the thread guide plate.