CN-122003523-A - Serging sewing machine

CN122003523ACN 122003523 ACN122003523 ACN 122003523ACN-122003523-A

Abstract

The overlock sewing machine (100) is provided with an adjustment input part (34), and when the needle thread adjusting part (24) is moved by pulling the middle part of the first operation wire (321), the adjustment input part (34) also pulls the middle part of the second operation wire (331), so as to restrain or reduce the linkage of the lower looper thread adjusting part (25) and the upper looper thread adjusting part (26) which is generated by the adjustment linkage part (27) and is accompanied with the movement of the needle thread adjusting part (24).

Inventors

Hua Tiangang
FUKUMORI EIJI
YANAGISAWA NORIO

Assignees

JUKI株式会社

Dates

Publication Date: 20260508
Application Date: 20241009
Priority Date: 20231013

Claims (6)

1.A serging sewing machine is provided with: a needle up-and-down movement mechanism for moving up and down the needle through which the needle thread is threaded; a lower looper mechanism having a lower looper that inserts a lower looper wire into a wire loop penetrating the needle wire; An upper looper mechanism having an upper looper that inserts an upper looper wire into a wire loop penetrating the lower looper wire; a feeding mechanism for conveying the sewed objects, and A thread extracting mechanism for extracting the needle thread, the lower looper thread, and the upper looper thread from a thread supply source in synchronization with each needle falling, In the serging sewing machine, The wire extraction mechanism includes: an upstream guide portion having an introduction portion for inserting the needle thread, the upper looper thread, and the lower looper thread into the respective threads; a downstream guide portion having a lead-out portion for inserting the needle thread, the upper looper thread, and the lower looper thread into the respective threads; a pull-out unit that reciprocates between the upstream guide unit and the downstream guide unit in a direction intersecting the needle thread, the upper loopers, and the lower loopers, which cross the guide unit from the respective introduction units, and that pulls out the needle thread, the upper loopers, and the lower loopers from the respective supply sources; A thread adjusting unit that moves in the intersecting direction between the upstream guide unit and the downstream guide unit to change a path of the thread that spans from the introducing unit to the drawing unit, thereby adjusting a length of the thread drawn by the drawing unit; An upper loop wire adjusting unit that moves in the intersecting direction between the upstream guide unit and the downstream guide unit to change a path of the upper loop wire that crosses from the lead-in unit to the lead-out unit, and adjusts a pull-out length of the upper loop wire pulled out by the pull-out unit; A lower loop wire adjusting unit that moves in the intersecting direction between the upstream guide unit and the downstream guide unit to change a path of the lower loop wire that spans from the lead-in unit to the lead-out unit, and adjusts a pull-out length of the lower loop wire pulled out by the pull-out unit; A first input unit that moves the needle and thread adjusting unit in the intersecting direction by a first operation wire; a second input unit that moves the upper wire harness adjustment unit and the lower wire harness adjustment unit in the intersecting direction by a second operation wire; An adjustment linkage unit for linking the upper looper adjustment unit and the lower looper adjustment unit when the needle thread adjustment unit moves via the second operation wire, and An adjustment input unit that pulls a middle portion of the first operation wire to move the needle thread adjustment unit in the intersecting direction, The adjustment input unit is configured to, when the needle thread adjusting unit is moved by pulling the intermediate portion of the first operation wire, also pull the intermediate portion of the second operation wire, and suppress or reduce the interlocking of the lower loop wire adjusting unit and the upper loop wire adjusting unit caused by the movement of the needle thread adjusting unit by the adjustment interlocking unit.
2. The serging sewing machine according to claim 1, wherein, The first input part comprises a setting input part of sewing space.
3. The serging sewing machine according to claim 1, wherein, The second input portion includes a setting input portion of a lockstitch width.
4. The serging sewing machine according to claim 1, wherein, The sewing machine includes a sewing type selecting unit that adjusts, if a type of sewing is selected, respective thread extraction amounts of the needle thread, the upper looper thread, and the lower looper thread to thread extraction amounts corresponding to the selected type of sewing.
5. The serging sewing machine according to claim 1, wherein, The sewing machine is provided with a thickness detection part which adjusts the thread extraction amount of each of the needle thread, the upper looper thread and the lower looper thread according to the thickness of the sewed object.
6. The serging sewing machine according to claim 1, wherein, The wire-bonding machine is provided with a wire-bonding tension setting input part which performs setting input on the wire tensions of the upper wire-bonding wire and the lower wire-bonding wire.

Description

Serging sewing machine Technical Field The present invention relates to a serging sewing machine. Background The conventional serging sewing machine draws a thread from a thread supply source at a predetermined thread drawing amount for each needle with respect to a needle thread and a looper thread. Thus, the conventional serging sewing machine performs sewing while optimizing the thread tension of each thread. In addition, a conventional serging sewing machine automatically adjusts the thread extraction amount of each thread according to the sewing pitch, the serging width, and the selected sewing type, thereby optimizing the thread tension of each thread (for example, refer to patent document 1). Patent document 1 Japanese patent laid-open No. 10-272273 Disclosure of Invention The conventional sewing machine has a structure in which various thread drawing mechanisms are linked, and if the thread drawing amount of the needle thread is adjusted, the thread drawing amount of the looper thread is also adjusted in a linked manner. In this case, the burden of the adjustment work can be reduced as compared with the case of performing adjustment of each wire, and convenience is provided for the user. However, the conventional sewing machine cannot cope with the demand for changing the texture of the stitch by adjusting the thread tension only for the needle thread. The purpose of the present invention is to enable the linkage adjustment of the thread extraction amount of a needle thread and a looper thread, and also to suppress the fluctuation of the thread tension of the looper thread to adjust the thread tension of the needle thread. One embodiment of the present invention is a serging sewing machine, comprising: a needle up-and-down movement mechanism for moving up and down the needle through which the needle thread is threaded; a lower looper mechanism having a lower looper that inserts a lower looper wire into a wire loop penetrating the needle wire; An upper looper mechanism having an upper looper that inserts an upper looper wire into a wire loop penetrating the lower looper wire; a feeding mechanism for conveying the sewed objects, and A thread extracting mechanism for extracting the needle thread, the lower looper thread, and the upper looper thread from a thread supply source in synchronization with each needle falling, In the serging sewing machine, The wire extraction mechanism includes: an upstream guide portion having an introduction portion for inserting the needle thread, the upper looper thread, and the lower looper thread into the respective threads; a downstream guide portion having a lead-out portion for inserting the needle thread, the upper looper thread, and the lower looper thread into the respective threads; a pull-out unit that reciprocates between the upstream guide unit and the downstream guide unit in a direction intersecting the needle thread, the upper loopers, and the lower loopers, which cross the guide unit from the respective introduction units, and that pulls out the needle thread, the upper loopers, and the lower loopers from the respective supply sources; A thread adjusting unit that moves in the intersecting direction between the upstream guide unit and the downstream guide unit to change a path of the thread that spans from the introducing unit to the drawing unit, thereby adjusting a length of the thread drawn by the drawing unit; An upper loop wire adjusting unit that moves in the intersecting direction between the upstream guide unit and the downstream guide unit to change a path of the upper loop wire that crosses from the lead-in unit to the lead-out unit, and adjusts a pull-out length of the upper loop wire pulled out by the pull-out unit; A lower loop wire adjusting unit that moves in the intersecting direction between the upstream guide unit and the downstream guide unit to change a path of the lower loop wire that spans from the lead-in unit to the lead-out unit, and adjusts a pull-out length of the lower loop wire pulled out by the pull-out unit; A first input unit that moves the needle and thread adjusting unit in the intersecting direction by a first operation wire; a second input unit that moves the upper wire harness adjustment unit and the lower wire harness adjustment unit in the intersecting direction by a second operation wire; An adjustment linkage unit for linking the upper looper adjustment unit and the lower looper adjustment unit when the needle thread adjustment unit moves via the second operation wire, and An adjustment input unit that pulls a middle portion of the first operation wire to move the needle thread adjustment unit in the intersecting direction, The adjustment input unit is configured to, when the needle thread adjusting unit is moved by pulling the intermediate portion of the first operation wire, also pull the intermediate portion of the second operation wire, and suppress or reduce the interlocking of the lower loop wire adjusting un