Overlock sewing machine
AssigneeJanome Sewing Machine Co., Ltd.
InventorEiichi Shomura
Life of this patent
Estimating the term…
Abstract
With a overlock sewing machine, when a switching mechanism is switched to a threading-enabled state, and a looper cover is closed, the looper cover is slid toward one side in the hinge shaft axial direction so as to operate a detection lever. In the non-operating state, the detection lever is set to an initial position where it does not press an operation protrusion of a switch. When a side cover is closed, and the detection lever is operated, the operation lever is set to an operation-enabled position where it presses the operation protrusion. When the operation lever is operated, and the side cover is opened, the detection lever is set by passing through the operation-enabled to the operation-disabled position where it does not press the operation protrusion.
Claims6
An overlock sewing machine comprising:
- a threading mechanism that performs threading for a looper;
- a switching mechanism that switches the threading mechanism between a threading state and a sewing-enabled state;
- a looper cover coupled with a hinge shaft extending in a width direction on a front side of the threading mechanism such that it can be opened and closed, and configured to cover at least a part of the looper at a closed position;
- a side cover provided on one side along the hinge shaft with respect to the looper cover, and coupled with a sewing machine main body such that it can be opened and closed;
- a switch configured including an operation protrusion, and configured such that, when the operation protrusion is pressed, a motor configured to drive a main shaft is switched from a driving-disabled state to a driving-enabled state;
- and
- a detection lever configured to press the operation protrusion, and configured such that, when the switching mechanism is switched to the sewing-enabled state in a state in which the looper cover is positioned at a closed state, the looper cover is slid toward one side in an axial direction of the hinge shaft, which operates the detection lever,
- wherein, in a non-operation state, the detection lever is positioned at an initial position at which it does not press the operation protrusion,
- wherein the side cover is configured:
- when the detection lever is operated in a state in which the side cover is set to a closed position, the detection lever is set to an operation-enabled position at which the detection lever presses the operation protrusion;
- and
- when the detection lever is operated in a state in which the side cover is set to an open position, the detection lever is set by passing through the operation-enabled position to an operation-disabled position at which the detection lever does not press the operation protrusion.
Dependencies are inferred from the claim text.