Wire-clamping device for sewing machine
A sewing machine and thread clamping technology, which is applied to sewing machine components, tension devices, sewing equipment, etc., can solve the problems of responsive change of driving source, limited miniaturization, and increased component cost, so as to reduce the number of components, achieve lightweight, The effect of reducing the number of parts
Inactive Publication Date: 2012-03-21
JUKI CORP
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Problems solved by technology
[0012] However, in the driving source of the wire clamping device such as the above-mentioned solenoid and voice coil motor, a yoke with a complicated shape is required to form a magnetic circuit, and the cost of components increases.
In addition, there are many parts on the drive transmission path from the drive source to the clamping plate, and the responsiveness of the drive source varies greatly due to tolerances in the assembly of the parts or processing roughness, and it may not be possible to properly tension to grip the line
In addition, there is a space limit for arranging the mechanism for driving the needle or the thread take-up in the narrow sewing machine head frame, and if the number of parts increases, the weight will also increase, the responsiveness will decrease, or there will be limitations in miniaturization , cannot be accommodated in the rack
Method used
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[0040] Hereinafter, best embodiments of the present invention will be described in detail with reference to the drawings.
[0041]
[0042] Such as figure 1 , figure 2 As shown, the thread clamping device 1 of the sewing machine is arranged on the sewing machine head frame 2, and the sewing machine head frame 2 is formed by a ferromagnetic material, and has a built-in: a main shaft 11 driven by a sewing machine motor (not shown); The needle bar 13 that is connected to the eccentric cam 12 provided on the main shaft 11 and moves up and down synchronously with the rotation of the main shaft 11; and the thread take-up member 14 that tightens the thread by rising during sewing.
[0043] Here, the so-called ferromagnetic material refers to materials generally called ferromagnetic materials such as iron, cobalt, and nickel.
[0044] The thread clamping device 1 is arranged near the jaw of the sewing machine head frame 2 in a manner penetrating from the front to the back, and cla...
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Disclosed is a trapping device for sewing machines, which is capable of putting down member number, making it easy to realize member assembling task, improve the response, realizing the miniaturisation and lowering the cost. The device (1) comprises a couple of clampers (31, 32) for holding thread; a movable plate presser foot (33) for separating a clamper (31) at one side from the clamper (32) at the other side, by abutting on a clamper (31) at one side; a driving mechanism (4) for driving the plate presser foot (33) to drive a clamper (31) at one side to move toward the clamper (32) at the other side; and a driving source (5) which is mounted inside the sewing machines head section machine frame (2) composed of ferromagnetic materials and is used for driving the driving mechanism (4), and comprises a movable member (6) equipped with permanent magnets (52, 53) and a fixed part (7) equipped with winding coil curls (55) around the permanent magnets (52, 53) and with preceptive inter spaces, wherein the sewing machines head section machine frame (2) acts as coil curl yoke of thecoil curls (55).
Description
technical field [0001] The invention relates to a thread clamping device of a sewing machine. Background technique [0002] In the sewing machine, in order to prevent the slack of the thread, a thread tension device is provided to apply an appropriate tension to the thread. [0003] Such as Figure 7 As shown, the thread clamping device 100 is arranged on the front side of the sewing machine head frame 101 ( Figure 7 on the right side of the ). On the front side of the sewing machine head frame 101, a thread take-up member 102 that tightens the thread by moving up and down is provided, and the thread supplied from the thread supply source to the needle, after passing through the thread take-up member 102, constitutes a thread clamping device. A pair of clamping plates 103, 104 of 100 are clamped, and an appropriate tension is applied. A solenoid 105 as a driving source of the thread tension plate 103 on the driving side is provided on the back side of the sewing machine h...
Claims
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IPC IPC(8): D05B47/04H01F7/06
CPCD05B47/04
Inventor 风晴广行
Owner JUKI CORP