US 10,988,878 B2Granted

Overlock sewing machine

AssigneeJanome Sewing Machine Co., Ltd.

InventorUshio Yokoyama

Life of this patent

Estimating the term…

Abstract

An overlock sewing machine includes an operating shaft that is slidable between first and second positions, and configured such that interlock switching and position switching mechanisms are operated when it is turned. The interlock switching mechanism includes a rotor that is rotatable together with the operating shaft as a single unit, an interlock switching member, and a first engagement target portion formed in the rotor. In the interlock state, setting the operating shaft to the first position engages an engagement portion of the interlock switching member with the first engagement target portion, which restricts operating shaft rotation. Sliding the operating shaft to the second position releases the engagement state between the engagement and first engagement target portions, enabling rotation of the operating shaft.

Claims7

Dependent claims

An overlock sewing machine comprising:

an upper blade configured such that it can be moved between an interlock position at which it is driven in an upper-lower direction together with a rotation of a main shaft and a retraction position to which it is to be retracted downward from the interlock position;
a rod configured such that it extends in a direction that is orthogonal to an axial direction of the main shaft, and arranged such that one end portion is coupled to the main shaft by an eccentric cam, which allows the rod to be swung by a driving force applied by the main shaft;
a swing member supported by a support shaft arranged in parallel with the axial direction of the main shaft such that it can be swung, coupled to the upper blade via another member, comprising a fitting portion configured such that it can be fitted into a fitting target portion provided to the other end portion of the rod, and configured such that, when the fitting portion is fitted into the fitting target portion, the swing member is reciprocally swung accompanying a swinging of the rod according to a rotation of the main shaft, so as to drive the upper blade in the upper-lower direction when the upper blade is set to the interlock position;
an interlock switching mechanism configured to operate to switch a state to an interlock state, in which the fitting target portion is fitted into the fitting portion so as to allow the upper blade to be driven together with the main shaft, or otherwise an interlock release state, in which a fitting state between the fitting target portion and the fitting portion is released so as to release the interlock state;
a position switching mechanism configured to operate such that a position of the upper blade is switched to the retraction position or otherwise the interlock position;
and
an operating shaft configured such that it can be slid between a first position and a second position to which it is to be slid from the first position in the axial direction, and such that, by turning the operating shaft, the interlock switching mechanism and the position switching mechanism are operated,
wherein the interlock switching mechanism comprises:
a rotor provided such that it can be rotated together with the operating shaft as a single unit;
an interlock switching member coupled to the fitting target portion, including an engagement portion protruding toward a rotor side, and configured to operate according to the rotation of the rotor so as to switch the state to the interlock state or otherwise the interlock release state;
and
a first engagement target portion formed in the rotor such that it can be engaged with the engagement portion,
wherein, in the interlock state, upon setting the operating shaft to the first position, the engagement portion is engaged with the first engagement target portion so as to restrict the rotation of the operating shaft,
and wherein, upon sliding the operating shaft to the second position, the engagement state between the engagement portion and the first engagement target portion is released so as to enable the rotation of the operating shaft.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/565,233Filed 9 Sep 2019 · continuation
Priority: JP JP2017-05981224 Mar 2017
Published: US 2020/0002864 A12 Jan 2020
Granted: 27 Apr 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

A61F 5/02
Orthopaedic devices, e.g. long-term immobilising or pressure directing devices for treating broken or deformed bones such as splints, casts or…
D05B 1/20
Seams for protecting or securing edges: overedge seams
D05B 1/12
For making multi-thread seams: lock-stitch seams
D05B 37/06
Cutting devices: with oscillating tools

Family

PCT/JP2018/009825Parent of this continuation · filed 13 Mar 2018
US 2020/0002864 A1Pre-grant publication · published 2 Jan 2020
US 10,988,878 B2This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

Open elsewhere

patentgrep

Loading patent…

Abstract

An overlock sewing machine comprising:

an upper blade configured such that it can be moved between an interlock position at which it is driven in an upper-lower direction together with a rotation of a main shaft and a retraction position to which it is to be retracted downward from the interlock position;
a rod configured such that it extends in a direction that is orthogonal to an axial direction of the main shaft, and arranged such that one end portion is coupled to the main shaft by an eccentric cam, which allows the rod to be swung by a driving force applied by the main shaft;
a swing member supported by a support shaft arranged in parallel with the axial direction of the main shaft such that it can be swung, coupled to the upper blade via another member, comprising a fitting portion configured such that it can be fitted into a fitting target portion provided to the other end portion of the rod, and configured such that, when the fitting portion is fitted into the fitting target portion, the swing member is reciprocally swung accompanying a swinging of the rod according to a rotation of the main shaft, so as to drive the upper blade in the upper-lower direction when the upper blade is set to the interlock position;
an interlock switching mechanism configured to operate to switch a state to an interlock state, in which the fitting target portion is fitted into the fitting portion so as to allow the upper blade to be driven together with the main shaft, or otherwise an interlock release state, in which a fitting state between the fitting target portion and the fitting portion is released so as to release the interlock state;
a position switching mechanism configured to operate such that a position of the upper blade is switched to the retraction position or otherwise the interlock position;
and
an operating shaft configured such that it can be slid between a first position and a second position to which it is to be slid from the first position in the axial direction, and such that, by turning the operating shaft, the interlock switching mechanism and the position switching mechanism are operated,
wherein the interlock switching mechanism comprises:
a rotor provided such that it can be rotated together with the operating shaft as a single unit;
an interlock switching member coupled to the fitting target portion, including an engagement portion protruding toward a rotor side, and configured to operate according to the rotation of the rotor so as to switch the state to the interlock state or otherwise the interlock release state;
and
a first engagement target portion formed in the rotor such that it can be engaged with the engagement portion,
wherein, in the interlock state, upon setting the operating shaft to the first position, the engagement portion is engaged with the first engagement target portion so as to restrict the rotation of the operating shaft,
and wherein, upon sliding the operating shaft to the second position, the engagement state between the engagement portion and the first engagement target portion is released so as to enable the rotation of the operating shaft.

11 more elements

Facts

Application

16/565,233Filed 9 Sep 2019 · continuation

Priority

JP JP2017-05981224 Mar 2017

Published

US 2020/0002864 A12 Jan 2020

Granted

27 Apr 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

A61F 5/02
Orthopaedic devices, e.g. long-term immobilising or pressure directing devices for treating broken or deformed bones such as splints, casts or…
D05B 1/20
Seams for protecting or securing edges: overedge seams
D05B 1/12
For making multi-thread seams: lock-stitch seams
D05B 37/06
Cutting devices: with oscillating tools