JPS6414380U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本考案の実施例に係り、第１図は本考案
のワライ防止機構の作動機構説明図、第２図は上
糸押圧作用の説明図、第３図及び第４図は上糸の
支持体の内釜装着状態の説明図であり、第３図は
上面図、第４図はＡ矢視図、第５図は他の実施例
のワライ防止機構の作動機構説明図、第６図は作
動する押圧体の斜視図、第７図は釜の上面図、第
８図は本考案のワライ防止装置を組込んだミシン
の外観図、第９図はミシンの駆動機構の説明図、
第１０図は縫い目の説明図、第１１図は従来の縫
い目形成過程のワライ発生状態の説明図、第１２
図は本考案のワライ防止装置を用いた縫い目形成
過程の説明図であり、３２は下糸、３３は下糸巻
、３４は内釜、３５は弾性体、３６は上糸押圧体
、３７は支持体、３８はロツド、３９は従動体、
４０は頭付きピン、４１はカム、４２はバネ、４
３は磁石、４４は柔軟性部材、４５は押圧体、４
６は磁石である。 The drawings relate to embodiments of the present invention; Fig. 1 is an explanatory diagram of the operating mechanism of the warp prevention mechanism of the present invention, Fig. 2 is an explanatory diagram of the upper thread pressing action, and Figs. 3 and 4 are illustrations of the upper thread support. FIG. 3 is a top view, FIG. 4 is a view in the direction of arrow A, FIG. 5 is an explanatory diagram of the operating mechanism of the warp prevention mechanism of another embodiment, and FIG. FIG. 7 is a top view of the hook; FIG. 8 is an external view of a sewing machine incorporating the warp prevention device of the present invention; FIG. 9 is an explanatory diagram of the drive mechanism of the sewing machine;
Fig. 10 is an explanatory diagram of a seam, Fig. 11 is an explanatory diagram of a state where cracks occur in the conventional seam forming process, and Fig. 12 is an explanatory diagram of a seam formation process.
The figure is an explanatory view of the seam forming process using the warp prevention device of the present invention, where 32 is a lower thread, 33 is a lower thread winder, 34 is an inner hook, 35 is an elastic body, 36 is an upper thread presser, and 37 is a support. body, 38 is rod, 39 is driven body,
40 is a headed pin, 41 is a cam, 42 is a spring, 4
3 is a magnet, 44 is a flexible member, 45 is a pressing body, 4
6 is a magnet.

Claims (1)

【実用新案登録請求の範囲】 (1) 縫い目形成サイクルにおいて、釜に捕捉さ
れている上糸糸輪の釜から縫い目側の上糸経路上
に常に上糸に接触しない位置に配置され押圧され
た上糸が当接することにより上糸に抵抗を与える
弾性体と、該弾性体に対向して配置され作動する
ことにより、前記上糸に作用して前記弾性体に押
圧する第１の位置と前記上糸を解放する第２の位
置に移動可能な上糸押圧体と、該上糸押圧体を位
相に応じて作動させる作動手段とにより構成する
ミシンのワライ防止装置。 (2) 前記押圧体の作動する第１の位置は縫い目
形成サイクルの上糸を捕捉した釜が前記上糸糸輪
を最大に押し広げる位相から該上糸糸輪が押圧部
材より脱出する直前の位相までの位相区間である
ことを特徴とする実用新案登録請求の範囲第１項
に記載のミシンのワライ防止装置。[Scope of Claim for Utility Model Registration] (1) During the seam forming cycle, the needle thread loop captured by the hook is placed and pressed on the needle thread path on the seam side from the hook at a position where it does not always contact the needle thread. an elastic body that provides resistance to the needle thread when the needle thread comes into contact with the needle thread; a first position that is disposed opposite to the elastic body and operates to act on the needle thread and press it against the elastic body; A warp prevention device for a sewing machine comprising an upper thread pressing member movable to a second position for releasing the upper thread, and an actuating means for operating the upper thread pressing member according to a phase. (2) The first position in which the pressing body operates is from the phase in which the hook that has captured the needle thread in the stitch forming cycle pushes the needle thread ring to its maximum extent, to just before the needle thread ring escapes from the pressing member. The warp prevention device for a sewing machine according to claim 1, which is a phase interval up to a phase.