Control device for pneumatic outer presser foot pressing mechanism of bar tacking machine

Abstract

The invention discloses a control device for a pneumatic outer presser foot pressing mechanism of a bar tacking machine. The control device comprises a feed support, a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a first cylinder, a second cylinder, a filter and an electromagnetic valve, wherein the first connecting rod and the second connecting rod are arranged on the feed support and are bilaterally symmetric, and are respectively fixed with the third connecting rod and the fourth connecting rod; the first cylinder and the second cylinder are arranged on the feed support, and are connected with the first connecting rod and the second connecting rod through a first connecting rod pin and a second connecting rod pin; a first tube joint ofthe filter is connected with a first tube joint of the electromagnetic valve through a first air tube of the filter; a second tube joint of the electromagnetic valve is connected with a first Y-shaped tube joint and a second Y-shaped tube joint through a third air tube and a fourth air tube respectively; and a first air tube and a second air tube of the first Y-shaped tube joint, a first air tubeand a second air tube of the second Y-shaped tube joint are connected with tube joints of the first cylinder and the second cylinder. The control device can avoid sewing material displacement.

Description

technical field [0001] The invention relates to an electronic tacking machine, in particular to a control device for a pneumatic outer presser foot lifting mechanism of the tacking machine. Background technique [0002] Electronic tacking machine is a kind of special clothing equipment for bags, leather, labels, etc., which is mainly used for their decorative sewing. The machine uses a direct-drive servo motor to drive the upper shaft, and the X-axis and Y-axis are both driven by stepping motors. Programming is performed through programming software or the operation panel, and computer control is used to complete various patterns of sewing equipment. [0003] The outer presser foot lifting mechanism in the tacking machine refers to the mechanism that uses the electromagnet as the power source to complete the lifting or lowering movement of the outer presser foot through other linkage mechanisms. [0004] Such as figure 1 As shown, in the control device of the pneumatic out...

AI Technical Summary

Problems solved by technology

When the tension of the return spring is large or the torque of other linkage mechanisms is large, the electromagnet is slow or unable to attract; when the tension of the return spring is small or the torque of other linkage mechanisms is large, the mechanism resets slowly or It cannot be reset, so that the machine cannot work normally and affects the performance of the machine

The attraction force of the electromagnet cannot be adjusted freely, so that when the machine is sewing thick materials, the sewing material cannot be clamped tightly due to insufficient pressing force, and the position will appear, resulting in the phenomenon of stitches being out of shape.

There are many parts in this mechanism, the assembly is complicated, and the machining precision of the casing is high, which makes the cost higher

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