Thread inserting device

Patent metadata

Field	Value
Publication number	US-9856586-B2
Application number	US-201615244164-A
Country	US
Kind code	B2
Filing date	Aug 23, 2016
Priority date	Sep 18, 2015
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

A thread inserting device includes a guide pin having a thread capture portion at its tip for capturing a thread; a holder that fixedly holds the guide pin; a main body (first and second main bodies) slidably mounting the holder; and a thread cutting portion provided to the main body for cutting the thread to a length equal to or smaller than the protrusion of the thread capture portion from a thread captured position on a thread tip 6 a side after the thread is captured by the thread capture portion. By shifting the holder, the thread capture portion is protruded to a predetermined length from the main body, and the thread cut to a predetermined length by the thread cutting portion is inserted into the thread inserting hole.

First claim

What is claimed is:

1. A thread inserting device for inserting a thread into a thread inserting hole of a sewing machine, the thread inserting device comprising:
a guide member having a thread capture portion at a tip end thereof configured to capture a thread;
a holder that fixedly holds the guide member;
a main body slidably mounting the holder; and
a thread cutting portion that is provided to the main body, and is configured to cut a thread to a length that is equal to or otherwise smaller than a length of a protrusion of the thread capture portion from a position at which the thread is captured by the thread capture portion on a thread tip side after the thread is captured by the thread capture portion,
wherein, by shifting the holder, the thread capture portion is protruded to a predetermined length from the main body, so as to insert the thread cut to a predetermined length by the thread cutting portion into the thread inserting hole.

2. A thread inserting device for inserting a thread into a thread inserting hole of a sewing machine, the thread inserting device comprising:
a guide member having a thread capture portion at a tip end thereof configured to capture a thread;
a holder that fixedly holds the guide member;
a main body mounting the holder and the guide member such that they can be slidably shifted between an operating position at which the thread capture portion is protruded and a standby position at which the thread capture portion is retracted;
a thread holding portion that is provided to the main body and that is configured to hold a thread on a thread reel side after the thread is captured by the thread capture portion when the holder is set to the standby position; and
a thread cutting portion that is provided to the main body, and that is configured to cut a thread to a length that is equal to or otherwise smaller than a length of a protrusion of the thread capture portion from a position at which the thread is captured by the thread capture portion on a thread tip side after the thread is captured by the thread capture portion,
wherein, by shifting the holder to the operating position, the thread capture portion is protruded to a predetermined length from the main body, so as to insert the thread cut to a predetermined length by the thread cutting portion into the thread inserting hole.

3. The thread inserting device according to claim 2 , further comprising a releasing portion that releases the thread from being held by the thread holding portion, by shifting the holder from the standby position to the operating position side.

4. The thread inserting device according to claim 2 , wherein the main body comprises a first main body and a second main body,
wherein the first main body and the second main body are arranged such that the guide member is interposed between them,
wherein the holder has a hole through which the main body and the guide member are inserted,
and wherein the main body is inserted together with the guide member into the hole of the holder.

5. The thread inserting device according to claim 2 , further comprising a force applying portion that applies, to the holder, a force toward the standby position.

6. The thread inserting device according to claim 5 , wherein the main body comprises:
a protruding portion configured to be inserted into the thread inserting hole of the sewing machine; and
a contact portion that is provided as a periphery of the protruding portion, and that comes in contact with a periphery of the thread inserting hole so as to maintain a position of the main body when the holder is shifted toward the operating position side against the force applied by the force applying portion.

Assignees

• Janome Sewing Machine Co Ltd

Inventors

• Shomura Eiichi
• Yokoyama Ushio

Classifications

• D05B87/00

  Needle- {or looper-} threading devices · CPC title

• D03D47/23 Primary

  Thread grippers (in dummy or gripper shuttles D03J5/06) · CPC title

• D05B53/00 Primary

  Thread- or cord-laying mechanisms; Thread fingers · CPC title

• D05B63/00

  Devices associated with the loop-taker thread, e.g. for tensioning · CPC title