TWI621747B - Needle structure of four-needle six-wire sewing machine - Google Patents

Abstract

A needle guarding structure for a four-needle six-wire sewing machine, the four-needle six-wire sewing machine having at least one casing, a transmission mechanism disposed in the casing and a driver for driving the transmission mechanism, and a drive mechanism driven by the transmission mechanism a needle bar that vertically moves up and down, the transmission mechanism has at least one bottom yarn action spindle that is limited in rotation and axial displacement by being disposed on the casing, and the bottom end of the yarn action spindle has a diameter reducing section, the diameter A bottom yarn guide is fixed to the end of the constricted portion, and the diameter reducing portion is formed with a pushing portion on the main shaft of the yarn end, wherein the housing further has at least one needle protecting structure, and the needle protecting structure comprises at least one a limiting member of the diameter reducing section, a straddle seat between the ejector portion and the limiting member and spanning the squashing portion, and one end of which is fixed to the straddle mount and is disposed on the pedestal The housing limits a support guide that is axially displaceable only, and a needle guard that is secured to the end of the support guide.

Description

Needle structure of four-needle six-wire sewing machine

The invention relates to a needle guarding structure of a four-needle six-wire sewing machine, in particular to a needle guard structure which is provided separately from a needle guide and a needle guard.

Pressing, during the sewing operation of the sewing machine, a needle penetrates from the top of a fabric to the fabric, and enters a lowest point, and then moves upward from the lowest point and leaves the fabric. In addition, when the bur is performing a reciprocating sewing operation, the casing of the sewing machine has a bottom yarn guide with a bottom yarn, and the yam guide and the yoke interact with each other to guide The bottom yarn and the woven thread of the bur are formed on the cloth, and the bur is inserted into the bottom yarn by repeating the up-and-down displacement and the woven wire is rotated back and forth with the yarn guide. After that, the sewing thread structure can be formed on the fabric. Specifically, when the bur is displaced downward from the upper side of the cloth, the front end of the bur is caused by the resistance generated by the cloth, and the tension formed by the woven wire when the stylus is displaced downward. It may cause a deviation of the relative position of the trajectory of the bur and the yarn guide, so that when the yam guide is rotated back and forth, the trajectory of the sway of the yam guide must be Adjacent to the bur, so if the displacement of the bur is brought into the front end of the woven line to produce a relative position deviation, it will hinder or affect the trajectory of the rotary oscillating motion of the yam guide, not when tying the yarn The problem of the jumper is that the yarn guide hits the bur and causes the stylus to deform or break the needle.

In order to solve the above problems, the prior art is a new patent of TW M351883, which discloses a sewing machine hook and thread guard adjustment assembly, and the hook line (ie, the bottom yarn guide described in the present case) includes a base. a socket, a hook bar and a needle guard (the needle guard described in the present invention); the base is provided with a downwardly facing strut, and the hook bar and the needle bar extend laterally above the base The hook bar has a a post connected to the base and a hook tip suspended at the other end, the hook bar is provided with a threading hole between the post and the hook tip; the needle bar is provided with a connecting end at one end And a protruding portion suspended at the other end, the needle guard bar being located in the same direction below the hook needle rod; wherein the connecting seat of the needle guard rod is positioned on a side of the connecting rod of the hook needle rod, A through hole and an opposite screw hole are disposed to each other to lock a fixing bolt; the connecting seat of the needle guard rod is provided with an adjusting device for adjusting the position of the needle guard rod. As is clear from the disclosure of the prior art, the prior art needle guard (i.e., the needle guard described in the present invention) and the hook (i.e., the yarn guide described in the present invention) are Firmly fastened together, that is to say, if the sewing machine is a four-needle six-wire sewing machine, it must have a plurality of burs, and when the hook swaying back and forth, the needle keeper will rotate synchronously. Since the needle guard must follow the hook and swing, the needle guard is required to push each needle one by one, and the needle guard is used to push the needle. The function of the stylus to be stabilized is inevitably applied with a considerable force, so that the ejector pin that is pushed up will have a slight forward bending condition, and at this time, the needle guard bar follows the rotary oscillating motion of the hook threader one by one. When pushing down the needle, it will cause the needle guard to hit each needle that has not been pushed forward and bend forward one by one. If it is long, it will easily cause the needle stick to wear or cause the needle to be deformed or broken. The problem with the needle.

The main object of the present invention is to solve the problem that the needle guard of the prior art can follow the simultaneous rotation and axial displacement of the yarn guide to cause the needle guard to hit the bur.

In order to achieve the above object, the present invention provides a needle guarding structure for a four-needle six-wire sewing machine having at least one housing, a transmission mechanism disposed in the housing, and a driver for driving the transmission mechanism. And a needle guide rod driven by the transmission mechanism to vertically move up and down, the transmission mechanism has at least a bottom yarn action spindle that is limited in rotation and axial displacement provided in the housing, the bottom yarn action spindle end edge The utility model has a diameter reducing section, a bottom yarn guiding device is fixed at the end of the diameter reducing section, and the diameter reducing section forms a pushing portion on the main shaft of the yarn spinning movement, and the needle needle has a needle seat under the needle guiding rod, the needle A plurality of burs are disposed under the seat, wherein the housing has at least one needle guard structure, and the needle guard structure includes at least one limiting member disposed on the diameter reducing portion, and a locating portion and the limiting member. And a support guide rod that is disposed on the cross-seat and has one end fixed to the cross-seat and is limited in axial displacement by being disposed on the housing, and is fixed on the support rod The needle guard at the end of the support guide rod has a needle guard for pushing the needle.

Further, the needle guard structure of the four-needle six-wire sewing machine, wherein the limiting member and the spanning seat further have a collar disposed on the diameter reducing section.

Further, the needle guard structure of the four-needle six-wire sewing machine, wherein the ground yarn action spindle has a set of spindle slides disposed on the diameter reduction section and providing the reduction section with a rotation margin and an axial displacement margin The sleeve has a fixing portion fixed to the housing.

Further, the needle guard structure of the four-needle six-wire sewing machine, wherein the support guide rod has a sleeve fixed on the housing and sleeved on the support guide rod to provide an axial displacement margin of the support guide rod cylinder.

Further, the needle guard structure of the four-needle six-wire sewing machine, wherein the support guide rod further has a fixing on the housing and sleeved on the supporting guiding rod to provide an axial displacement margin of the supporting guiding rod. casing.

According to the above technical solution, the beneficial effect achieved by the present invention over the essence of the prior art is that the needle guard structure formed by the present invention is separated from the needle guard by the present invention, by being located at the top The straddle portion between the pushing portion and the limiting member and spanning the squeezing portion, and one end fixed to the straddle mount and limiting the axial displacement thereof only by being disposed on the housing The support guide rod causes the needle guard to only perform axial displacement action following the yarn guide to achieve the purpose of pushing, but does not cause the needle guard to follow the yarn guide for rotation. The needle guard is completely prevented from rotating to hit the stylus.

10‧‧‧4-needle six-wire sewing machine

11‧‧‧Shell

20‧‧‧ drive

30‧‧‧Transmission mechanism

40‧‧‧Bottom yarn motion spindle

401‧‧‧Shrinking section

402‧‧‧Pushing Department

41‧‧‧Bottom guide

42‧‧‧Limited parts

421‧‧‧ collar

43‧‧‧Spindle sleeve

431‧‧‧Fixed parts

50‧‧‧ needle structure

51‧‧‧ Cross-seat

52‧‧‧Support guides

53‧‧‧ sleeve

54‧‧‧ casing

55‧‧‧ needle guard

551‧‧‧ needle guard

60‧‧‧ guide pin

70‧‧‧ needle seat

80‧‧‧ burs

Figure 1 is a perspective view of the appearance and internal mechanism of the present invention.

FIG. 2 is a perspective view showing a partial appearance of FIG. 1 of the present invention.

3 is a perspective view of a first embodiment of the partial appearance of FIG. 2 of the present invention.

4 is a perspective enlarged view showing the appearance of a partial exploded view of FIG. 3 of the present invention.

FIG. 5 is a perspective enlarged view showing the appearance of another partial exploded view of FIG. 3 according to the present invention.

FIG. 6 is a perspective enlarged view showing another partial appearance of the first embodiment of the present invention.

Figure 7 is a plan view of the Figure 6 of the present invention.

Figure 8 is a perspective view showing the continuous operation of Figure 6 of the present invention.

Figure 9 is a plan view of the Figure 8 of the present invention.

Figure 10 is a perspective view showing the continuous operation of Figure 8 of the present invention.

Figure 11 is a plan view of the Figure 10 of the present invention.

Figure 12 is a perspective view showing the continuous operation of Figure 10 of the present invention.

Figure 13 is a plan view of Figure 12 of the present invention.

Figure 14 is a perspective view showing the continuous operation of Figure 12 of the present invention.

Figure 15 is a plan view of Figure 14 of the present invention.

Figure 16 is a perspective view showing a second embodiment of the partial appearance of Figure 2 of the present invention.

Figure 17 is a perspective enlarged view showing the appearance of a partially exploded portion of Figure 16 of the present invention.

Figure 18 is a perspective enlarged view showing the appearance of another partial exploded view of Figure 16 of the present invention.

The detailed description and technical contents of the present invention will now be described with reference to the following drawings: First, referring to FIG. 1 to FIG. 5, the needle guarding structure of the four-needle six-wire sewing machine of the present invention, the four-needle six-wire sewing machine 10 The utility model has at least a casing 11 , a transmission mechanism 30 disposed in the casing 11 , a driver 20 for driving the transmission mechanism 30 , and a needle guide 60 driven by the transmission mechanism 30 to vertically move up and down. The transmission mechanism 30 has at least one ground yarn action spindle 40 that is limited in rotation and axial displacement by being disposed in the housing 11. The bottom end of the ground motion spindle 40 has a diameter reducing section 401. A bottom yarn guide 41 is fixed to the end, and the diameter reducing section 401 defines a pushing portion 402 on the yarn spinning main shaft 40. The needle bar 60 has a needle seat 70 below the needle bar 70. There is a plurality of burs 80, wherein the housing 11 has at least one needle guard structure 50, and the needle guard structure 50 includes at least a limiting member 42 disposed on the reducing portion 401, and a urging portion 402 The straddle seat 51 between the limiting members 42 and the straddle portion 401 of the squeezing portion 401 is fixed to the straddle mount 51 and is restricted from being axially displaceable by being disposed on the housing 11 A support guide 52, and a needle guard 55 fixed to the end of the support guide 52, the needle guard 55 has a needle guard 551 for pushing the needle 80. In addition, the limiting member 42 can be a fixing block (shown in FIG. 16 to FIG. 18) fixed on the reducing portion 401; of course, the limiting member 42 can also be a spring (see FIG. 3). In addition, between the limiting member 42 (spring) and the straddle mount 51, a collar 421 disposed on the reduced diameter section 401 may be further disposed. It is worth mentioning that the bottom yarn action spindle 40 has a set of spindle sleeves 43 disposed on the diameter reduction section 401 and providing the diameter reduction section 401 with a rotation margin and an axial displacement margin. The spindle sleeve 43 The support guide 52 has a fixing portion 431 fixed to the housing 11 , and the support guide 52 has a fixing on the housing 11 and is sleeved on the support guide 52 to provide axial displacement of the support guide 52 . The sleeve 53; and the support guide 52 further has a sleeve 54 fixed to the housing 11 and sleeved on the support guide 52 to provide an axial displacement margin of the support guide 52.

Further, referring to FIG. 6 to FIG. 15, when the four-needle six-thread sewing machine 10 of the present invention has not been engaged in the sewing operation and the stylus 80 is at the highest point, the stylus 80 and the ground yarn guide are provided. The relative positions of the device 41 and the needle guard 55 are as shown in FIG. 6 and FIG. 7; when the four-needle six-thread sewing machine 10 starts the sewing operation, the sewing position of the needle 80 is displaced downward to the lowest position, The bottom yarn action spindle 40 synchronously drives the yarn guide 41 and the needle guard 55 to axially displace the needle guard 55 to the stylus 80, and the bottom yarn action spindle 40 additionally The bottom yarn guide 41 is also rotated to a direction farther from the stylus 80 as shown in FIG. 8 and FIG. 9. It is noted that the bottom yarn action spindle 40 can simultaneously drive the yarn. The yarn guide 41 is axially displaced from the needle guard 55, but the cross-seat 51 and the support guide 52 of the present invention are designed such that the needle guard 55 does not follow the yarn guide at all. 41 is rotated; when the stylus 80 is displaced upward from the lowest position, the bottom yarn action spindle 40 will drive the bottom yarn guide 41 to rotate toward the stylus 80, but due to the straddle seat The structure of the support rod 52 and the like is such that the needle guard 55 does not follow the rotation of the yarn guide 41. At this time, the position of the needle guard 55 is completely unchanged and the axial thrust is maintained. The action of the stylus 80 is as shown in FIG. 10 and FIG. 11; when the stylus 80 continues to be displaced upward, the bottom yarn action spindle 40 continuously drives the bottom yarn guide 41 to rotate, and at this time, the needle guard 55 The position remains unchanged and the stylus 80 is continuously pushed up as shown in FIG. 12 and FIG. 13; similarly, when the stylus 80 is then displaced upward, the bottom yarn action spindle 40 continues to drive the yarn guide. The displacement of the needle 41 is also maintained, and the position of the needle guard 55 is also maintained unchanged and the needle 80 is continuously pushed up as shown in FIG. 14 and FIG. 15; When the stylus 80 is displaced upward to the highest point, the relative positions of the stylus 80, the yam guide 41 and the needle guard 55 are returned to FIG. 6 and FIG. 7; The operation is the sewing work performed by the four-needle six-thread sewing machine 10 of the present invention.

As shown in the above, the needle guard 50 is separated from the needle guard 55 by the yarn guide 41, and is located at the pushing portion 402 and the limiting member 42. The straddle 51 interposed between the squashing section 401 and the one end fixed to the straddle mount 51 and limited by the axial displacement of the support guide provided on the housing 11 The rod 52 causes the needle guard 55 to follow the yarn guide 41 for axial displacement to achieve the purpose of pushing the needle 80 without causing the needle guard 55 to follow the yarn guide. The device 41 performs a rotating motion so that the needle guard 55 does not rotate at all to hit the stylus 80.

The present invention has been described in detail above, but the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Variations and modifications are still within the scope of the patents of the present invention.

Claims (7)

A needle guarding structure of a four-needle six-wire sewing machine, the four-needle six-wire sewing machine (10) having at least a casing (11), a transmission mechanism (30) disposed in the casing (11), and a driving mechanism a driver (20) for operating the transmission mechanism (30), and a needle guide rod (60) driven by the transmission mechanism (30) to vertically move up and down, the transmission mechanism (30) having at least one disposed on the housing ( 11) a bottom yarn action spindle (40) that limits its rotation and axial displacement, the bottom end of the bottom yarn action spindle (40) has a reduced diameter section (401), and a bottom end of the diameter reduction section (401) is fixed a yarn guide (41), wherein the diameter reducing section (401) forms a pushing portion (402) on the yarn spinning main shaft (40), and a needle seat (70) under the needle bar (60) A plurality of burs (80) are disposed under the needle seat (70), wherein the housing (11) further has at least one needle guard structure (50), and the needle guard structure (50) includes at least one a limiting member (42) of the diameter reducing section (401), a straddle seat between the pushing portion (402) and the limiting member (42) and spanning the reducing portion (401) (51) one end is fixed to the straddle (51) and is limited by being disposed on the housing (11) a support guide (52) that is only axially displaceable, and a needle guard (55) fixed to the end of the support guide (52), the needle guard (55) having a pusher for pushing the vehicle Needle portion (551) of needle (80). The needle guarding structure of the four-needle six-wire sewing machine according to claim 1, wherein the limiting member (42) and the spanning seat (51) further have a sleeve disposed on the diameter reducing section (401). Ring (421). The needle guard structure of the four-needle six-wire sewing machine according to claim 1 or 2, wherein the bottom yarn action spindle (40) has a set of the diameter reducing section (401) and provides the diameter reduction section (401) A spindle sleeve (43) that rotates a margin and an axial displacement margin. The spindle sleeve (43) has a fixing portion (431) fixed to the housing (11). The needle guarding structure of the four-needle six-wire sewing machine according to claim 1 or 2, wherein the support guide (52) has a fixing member (11) fixed to the housing (11) and sleeved on the supporting guide rod (52) A sleeve (53) is provided for supporting the axial displacement of the guide rod (52). The needle guard structure of the four-needle six-wire sewing machine according to claim 3, wherein the support guide (52) has a fixing on the housing (11) and is sleeved on the support guide (52) to provide the A sleeve (53) that supports the axial displacement of the guide rod (52). The needle guard structure of the four-needle six-wire sewing machine according to claim 4, wherein the support guide (52) further has a fixing on the housing (11) and sleeved on the support guide (52). The support guide (52) axially shifts the margin of the sleeve (54). The needle guarding structure of the four-needle six-wire sewing machine according to claim 5, wherein the support guide (52) further has a fixing on the housing (11) and sleeved on the supporting guide (52). The support guide (52) axially shifts the margin of the sleeve (54).