Janome Sewing Machine Company Limited

Satoshi Maruo

Eiichi Shomura

Mikio Koike

Michio Hisatake

Masashi Ninomiya

Mitsuru Nishijima

Koji Okutani

Hideaki Kambara

Eiji Kanno

Koji Maeda

Yoshikazu Ebata

Yosuke Iizuka

A bobbin holder that grasps a holder body and a flange of a bobbin that winds a thread n around the holder body, the holder including: an opening formed in an upper surface of the holder body; a thread holding portion that holds a thread n and is arranged in the opening so as to protrude from a center of the holder body toward an outer circumference of the holder body; and a cutting blade that cuts the thread held by the thread holding portion, the blade being disposed in one of regions inside the opening that is partitioned by the thread holding portion, wherein the cutting blade is disposed on a thread path of the thread n being pulled after the thread n, which is wound around the bobbin grasped by a grasping portion and is pulled from the other region inside the partitioned opening, is held by the thread holding portion.

Bobbin holder

In a sewing machine having an automatic thread cutting mechanism, a situation of a thread cutting operation is detected in power-OFF to continuously carry out a proper operation when a power supply is turned ON again after sudden power-OFF. In a sewing machine having an automatic thread cutting mechanism, there is provided means for detecting an operation situation of the automatic thread cutting mechanism when a power supply is turned ON. Based on a signal for the detection, the automatic thread cutting mechanism is operated to complete a thread cutting operation and to carry out a control to return into an initial state when a stop is performed with the thread cutting mechanism in power-ON executing the thread cutting work.

Sewing machine having automatic thread cutting device

Disclosed is an automatic thread cutting device for a sewing machine which is provided with a horizontal loop taker, wherein a thread catching member () is operated in response to a thread cutting instruction to reciprocatingly move with a movable blade () along a predetermined course, the thread catching member () normally catching the upper thread when moving in the return-way of reciprocation to guide the upper thread to a fixed blade () which is provided to cut the upper thread in cooperation with the movable blade (), and wherein a thread regulating means is provided to cut the lower thread () together with the upper thread, the thread regulating means being operated to press down the lower thread () to a position where the lower thread () is caught by the thread catching member () in addition to the upper thread when the thread catching member () is moving in the return-way of reciprocation.

Automatic thread cutting device for sewing machine provided with horizontal loop taker

An overlock sewing machine has a movable cutter which is activated in association with rotation of a main drive shaft to cooperate with a fixed cutter provided in the same plane with an upper surface of a needle plate, to thereby cut a work while the work is being stitched. A link mechanism includes a drive link having one end rotatably connected to a mount and the other end is connected to the movable cutter and a swingable link having an arcuate guide groove extending between one end and a center axis thereof around which the swingable link is swingingly moved. The drive link has a point between opposite ends thereof operatively connected to the arcuate guide groove of the swingable link. An operating device includes an operating shaft which is operatively connected to the point of the drive shaft so that the point of the drive link may be substantially moved along the arcuate guide groove of the swingable link between said one end and center axis thereof by manipulation of an operating knob. The drive link having the point thereof moved to one end of the swingable link will be swingingly reciprocated to activate the movable cutter, and having the point thereof moved to the central axis of the swingable link will move the movable cutter to an inoperative position below the needle plate where the movable cutter is held at standstill.

Overlock sewing machine with movable cutter

Growing community of inventors

Tokyo, Japan

Satoshi Maruo