206results about "Thread-laying mechanisms" patented technology

The invention discloses a full-automatic pocket patching machine and accordingly the working efficiency is high, the degree of automation is high, and sewn finished products comprise double sides and multiple colors. The full-automatic pocket patching machine comprises a base station (1) and a material folding mechanism (2), a feeding mechanism (3), a sewing mechanism (4) and a controller (5) which are arranged on the base station (1); the sewing mechanism (4) comprises a sewing table, a head, at least two working needles, a plurality of pressing feet, an automatic needle replacement module and a pressing foot lifting mechanism; the working needles are arranged on the head; the pressing feet are matched with the working needles respectively; the pressing foot lifting mechanism is matched with the pressing feet; the sewing table is provided with at least two spindles which are matched with the working needles respectively. The full-automatic pocket patching machine is applied to the technical field of automatic sewing equipment.

A sewing machine includes a looper formed with a thread hole, a looper shaft holding the looper, and a thread pipe fixed to the looper shaft. The thread pipe includes a thread inserting port at one end and a thread discharging port at the other end. The sewing machine further includes a nozzle from which air is sprayed toward the thread inserting port, a switching mechanism operable to disconnect the looper from the looper shaft when the looper is at a front position, and a moving member which moves the looper to a rear position when the looper is disconnected from the looper shaft by the switching mechanism. When the looper is disconnected from the looper shaft and is moved to the rear position, the thread discharging port matches the thread hole, and the thread inserting port becomes close to the nozzle.

A threading device of sewing machine is disclosed, wherein the upper thread extended from a thread supply mounted on a sewing machine body may be easily and smoothly guided into engagement with a thread holder simultaneously when the threading device is operated to pass the upper thread through the eye of needle attached to the lower end of needle bar, the thread holder being arranged between the thread supply and the needle. The threading device comprises a vertically movable needle bar 16 having a needle attached to the lower end thereof, the needle having a needle eye, a needle bar support 1 for supporting the needle bar 16 such that the same may be vertically movable, a thread holder 20 mounted to the lower end of the needle bar 16, a threading member A1 having a thread engaging portion 5 and a threading hook 4b, a threading shaft 2 for having the threading member A1 secured to the lower end thereof, an operating section C for vertically moving and axially rotating the threading shaft 2 to pass the upper thread n through the needle eye 17a, the threading member A1 being so formed as to provide the thread engaging portion 5 for guiding the upper thread to the needle eye 17a, the needle holder 20 being formed with a groove 20b for holding the upper thread n, the groove 20b having an opening 20a at which the upper thread n is guided into the groove 20b from the rear side of the thread holder 20 while the thread engaging portion 5 is moved down with the upper thread n which is to be passed through the needle eye 17a.

The thread tensioner (9) for a sewing machine has a supporting plate (12) equipped with a first thread tensioning device (18) and a second thread tensioning device (17) on the supporting plate, and the tension load to the thread (10) is overcome. For the purpose, a release lever (31) is connected with the supporting plate (12), and works to abut on a release pin (30) of the thread tensioning devices (17, 18). The thread tensioner works in a manner that the release lever (31) abuts on the first thread tightening device (18) first and then the second thread tensioning device (17) with the progress of the pivotably moving processes by separate releasing steps by using a solenoid (36).

Disclosed is a needle threading machine of putting a thread through an eye of a needle provided in a sewing machine, the needle treading machine comprising a thread supplying unit supplying the thread along a predetermined thread guiding path; a thread catcher comprising a hook to hook the thread, and a hook supporter extended from the hook and supporting the hook; a thread catcher driver driving the thread catcher to reciprocate allowing the hook to be inserted in and return from the eye of the needle; and a thread guiding unit hooking the thread supplied from the thread supplying unit on the hook passed through the eye of the needle. Thus, the present invention provides a needle threading machine, in which a thread is stably hooked on a hook, thereby reducing a defective needle threading work and enhancing productivity.

In the present invention, an embroidery machine has a needle bar case (5) provided with a plurality of needle bars (3). When a main shaft (6) is rotated by a main shaft motor (first drive source) (60), the needle bars (3) are lift-driven and a known sewing operation is carried out. Lifting bars (15) are supported in the needle bar case (5) so as to respectively correspond to the needle bars (3), and each lifting bar (15) is lift-driven by a motor (second drive source) (16). As a substitute for a known fabric pressing body (18), at the lower end of the lifting bars (15) a cord guiding body (20) is attached that guides a cord material (27) above an object-of-sewing material. By changing the lifting stroke of the lifting bars (15), cord sewing or loop sewing of the cord material (27) is selectively carried out. Due to this configuration, it becomes possible to selectively carry out cord sewing and loop sewing of the cord material using a simple configuration.

The invention discloses a full-automatic pocket patching machine and accordingly the working efficiency is high, the degree of automation is high, and sewn finished products comprise double sides and multiple colors. The full-automatic pocket patching machine comprises a base station (1) and a material folding mechanism (2), a feeding mechanism (3), a sewing mechanism (4) and a controller (5) which are arranged on the base station (1); the sewing mechanism (4) comprises a sewing table, a head, at least two working needles, a plurality of pressing feet, an automatic needle replacement module and a pressing foot lifting mechanism; the working needles are arranged on the head; the pressing feet are matched with the working needles respectively; the pressing foot lifting mechanism is matched with the pressing feet; the sewing table is provided with at least two spindles which are matched with the working needles respectively. The full-automatic pocket patching machine is applied to the technical field of automatic sewing equipment.

A sewing machine, where is disposed a securing pin 5 on the front surface HF of a sewing machine H so as to be able to project therefrom and, before a sewing needle 1 is moved to its bottom dead point after a thread is cut, the securing pin 5 is projected to thereby secure an upper thread T provided on a thread take-up 4. Also, even in case where the operation of the sewing machine is started, the projecting state of the securing pin 5 is held. That is, when the thread take-up 4 is moved down once and, after then, the thread take-up 4 is moved up; and, when the upward moving thread take-up 4 reaches its top dead point, the securing pin 5 is retreated. The sewing machine can draw out an end of an upper thread to the rear side of cloth, limiting the amount of the upper thread drawn out at a first stitch by means of a simple construction, and to prevent the upper thread from being pulled out when the cloth is taken out by limiting the amount of the upper thread drawn out when a sewing needle stops at an upper dead point after the thread is cut off.

A sewing machine includes a needle bar holding a sewing needle having an eye hole, a needle threading mechanism including a threading hook passing a needle thread through the eye hole of the sewing needle, a presser bar with a presser foot attached to its lower end, a vertically moving mechanism vertically moving the presser bar, a drive mechanism driving the vertically moving mechanism, a threading operation unit operating the needle threading mechanism, and a drive mechanism controlling unit controlling the drive mechanism vertically moving the presser bar to a position where interference between the presser foot and threading hook is avoided when the needle threading operation unit is operated.

Sewing machine includes a tension detection section (26) for detecting tension acting on a sewn material (A) paid out from a rotary holder member, and a drive section for driving the rotary holder member, and the driving operation of the drive section (14) is controlled on the basis of the detection by the tension detection section. Once the tension acting on the sewn material has increased, the rotary holder member is driven to rotate by the drive section, so that the sewn material can be paid out smoothly from the rotary holder member. The sewing machine is particularly useful in a case where the rotary holder member is constructed into an increased size so that an increased amount of the sewn material can be wound thereon.

A threading device of a sewing machine is provided. The threading device includes a threading hook which moves forward to enter an eye of a needle to catch a needle thread, and moves rearward with the needle thread being caught to insert the needle thread through the eye, a threading shaft which holds the threading hook, an operating member which is operated to move the threading shaft, a threading operation mechanism which transmits the movement of the threading shaft to the threading hook to move the threading hook back and forth, and a restricting device which makes the threading operation mechanism inoperable when the spreader mechanism is attached to the sewing machine main body, and makes the threading operation mechanism operable when the spreader mechanism is detached from the sewing machine main body.

The present invention relates to a needle threading machine of putting a thread through an eye of a needle provided in a sewing machine, the needle threading machine comprising a thread catcher comprising a hook to hook the thread, and a hook supporter extended from the hook and supporting the hook; a thread catcher driver driving the thread catcher to reciprocate allowing the hook to be inserted in and return from the eye of the needle; and a thread transporting unit transporting the thread caught in the hook away from the hook after the hook is returned from the eye of the needle. Thus, the present invention provides a needle threading machine capable of not only reducing damage on a thread but also increasing the durability of a thread catcher.