Looper adjusting device of chain-type sewing machine
An adjustment device and technology for sewing machines, which are applied to sewing machine components, ferrule mechanisms for sewing machines, sewing equipment, etc., can solve the problem that the needle tip of a looper cannot be inserted into a thread loop, etc., and achieve the effect of avoiding skipped stitches.
Pending Publication Date: 2019-11-01
吴江阳光科技缝纫机有限公司
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Problems solved by technology
However, due to the influence of factors such as the thickness of the upper thread, the material, and the thickness, density, and material of the fabric, the shape of the loop formed when the needle moves upwards is different, so the height of the looper needs to be adjusted accordingly, otherwise the looper will appear The problem that the tip of the needle cannot be inserted into the wire loop
Method used
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[0024] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. The definition of orientation in the present invention is defined according to the usual observation angle of view of those skilled in the art and for the convenience of description, and does not limit to a specific direction.
[0025] This embodiment provides a looper adjusting device for a chain sewing machine. refer to figure 1 with figure 2 As shown, the looper adjusting device includes a machine needle 1 capable of reciprocating up and down, a looper shaft 2 driven to rotate by a power mechanism, and a looper 3 driven to rotate by the looper shaft 2 . The lower part of the machine needle 1 has a needle hole 10 for the upper thread to pass through. After the upper thread passes through the needle hole 10 of the mach...
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The invention discloses a looper adjusting device of a chain-type sewing machine. The height of a looper can be adjusted by the device to adapt to thread loops in different shapes. The device comprises a sewing machine needle, a looper shaft, the looper and an adjusting mechanism, the adjusting mechanism comprises an eccentric sleeve, the eccentric sleeve sleeves the looper shaft and can rotate relative to the looper shaft, and the looper is installed on the eccentric sleeve through a looper base; the distance between a large-external-diameter portion of the eccentric sleeve and the shaft axisof the looper shaft is longer than that between a small-external-diameter portion of the eccentric sleeve and the shaft axis of the looper shaft; in a first use state of the looper adjusting device,when the point of the looper is located over a needle hole, the large-external-diameter portion is located on the upper side of the looper shaft, and a first height difference is formed between the point of the looper and the needle hole; in a second use state of the looper adjusting device, when the point of the looper is located over the needle hole, the small-external-diameter portion is located on the upper side of the looper shaft, a second height difference is formed between the point of the looper and the needle hole, and the first height difference is larger than the second height difference.
Description
technical field [0001] The invention belongs to the field of sewing equipment, and in particular relates to a looper adjusting device of a chain sewing machine. Background technique [0002] The stitches made by chain sewing machines are chain stitches, which are often found on the hem of jackets, etc. The sewing principle of the chain sewing machine is generally as follows: the upper thread passes through the thread hole of the needle, and the needle is driven to reciprocate up and down to pass through or pass through the fabric. When the needle moves upwards, a thread loop of the upper thread is formed. The tip of the needle is inserted into the loop of thread to adjust the thread to the desired size. However, due to the influence of factors such as the thickness of the upper thread, the material, and the thickness, density, and material of the fabric, the shape of the loop formed when the needle moves upwards is different, so the height of the looper needs to be adjusted...
Claims
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IPC IPC(8): D05B63/00
CPCD05B63/00
Inventor 伊藤雅美金彩珍
Owner 吴江阳光科技缝纫机有限公司