Multi-needle double-head shuttleless strip sewing machine

Abstract

The application discloses a multi-needle double-head shuttleless striping sewing machine, which comprises a machine base, a pattern sewing mechanism fixedly arranged on the machine base and capable of sewing a pattern on cloth, a straight edge sewing mechanism movably arranged on the machine base and capable of sewing an edge of the striping cloth, a raw material transmission mechanism connected to a front end of the pattern sewing mechanism and capable of fixing and rotating to transmit the cloth, a finished product striping mechanism connected to a rear end of the straight edge sewing mechanism and capable of separating the sewed cloth into strips and collecting the strips, and the pattern sewing mechanism and the straight edge sewing mechanism are directly connected in transmission. The shuttleless machine with the double-head striping cutter simultaneously has the functions of pattern sewing and edge sewing. The pattern sewing part adopts a traditional sewing mechanical working principle, and the edge sewing part is connected by multiple groups of biasing mechanisms to realize up-down, front-back and left-right swinging to complete the sewing work. Therefore, the function of one machine is equivalent to the functions of two traditional shuttleless striping sewing machines, and the land occupation area is reduced and the cost is lowered.

Description

Technical Field

[0001] This invention relates to the field of sewing machines, and particularly to the field of traditional multi-needle shuttleless slit sewing machines. Background Technology

[0002] When processing patterned fabric strips using traditional shuttleless machines, two shuttleless machines are required: one to sew the pattern and the other to sew the edges of the fabric strips. After sewing, the strips are cut into strips. A fabric guide hopper is also needed between the two machines, resulting in a large footprint, high investment costs, and low production efficiency for shuttleless machines.

[0003] Therefore, existing multi-needle shuttleless slitting sewing machines need further improvement. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-needle double-head shuttleless slitting sewing machine, a shuttleless machine with a slitting cutter that simultaneously performs pattern sewing and sewing. The pattern sewing part adopts the working principle of traditional sewing machinery, while the sewing part is made up of multiple sets of biasing mechanisms connected together to achieve up-down, back-and-forth, and left-and-right movements to complete the sewing work. Thus, the function of one machine is equivalent to that of two traditional shuttleless slitting sewing machines, reducing the floor space and lowering the cost, improving production efficiency, and featuring a simple and convenient structure.

[0005] To achieve the above objectives, the present invention adopts the following solution:

[0006] A multi-needle double-head shuttleless slitting sewing machine includes a base, on which a pattern sewing mechanism for sewing patterns onto fabric is fixedly mounted. A straight sewing mechanism for sewing the edges of slitting fabric is movably mounted on the base. A raw material transmission mechanism for fixing and rotating the fabric is connected to the front end of the pattern sewing mechanism. A finished slitting mechanism for dividing and collecting the sewn fabric into strips is connected to the rear end of the straight sewing mechanism. The pattern sewing mechanism and the straight sewing mechanism are directly connected for transmission.

[0007] Furthermore, the base includes two sets of lower bases, with upper fixed seats above the two sets of lower bases. Fixed blocks are provided at both ends of the upper fixed seats. An adjustment component is provided on one side of each of the two sets of fixed blocks, and two sets of guide rails are provided on the other two sides.

[0008] Furthermore, the pattern sewing mechanism includes a sewing needle holder disposed between the two sets of fixed blocks. The sewing needle holder has multiple sets of needle sewing assemblies on one side and a conveying guide rod that can smoothly convey the fabric to the straight sewing mechanism on the other side. A fabric conveying mechanism is disposed on one side of the needle sewing assembly.

[0009] Furthermore, the straight sewing mechanism includes a movable base that can move left and right on two sets of guide rails. Each set of movable bases is equipped with multiple sets of bearings, and a transmission shaft is arranged between the bearings. One end of the transmission shaft is hinged to a transmission synchronous pulley, and the other end is equipped with a paddle eccentric mechanism. One set of movable bases is equipped with a servo motor, which is hinged to a motor synchronous pulley. A transmission belt is arranged between the motor synchronous pulley and the transmission synchronous pulley. A fixed crossbeam is arranged between the two sets of movable bases. A sewing needle rotating shaft is arranged on the fixed crossbeam. Multiple sets of sewing needle assemblies are arranged on the sewing needle rotating shaft. A sewing needle plate is arranged below the sewing needle assembly, and a hook assembly is arranged below the sewing needle plate. Two sets of first crank mechanisms are arranged between the transmission shaft and the sewing needle rotating shaft, and two sets of second crank mechanisms are arranged between the transmission shaft and the hook assembly.

[0010] Furthermore, the raw material transmission mechanism includes a fabric guide frame, with multiple sets of fabric support frames on one side and a machine adjustment workbench on the other side, and two sets of guide shafts on one side of the machine adjustment workbench.

[0011] Furthermore, the finished product slitting mechanism includes two sets of first fixing plates and one set of second fixing plates disposed on the fixed crossbeam. A first guide roller is disposed between the two sets of first fixing plates. A cutting shaft is disposed on one side of the first guide roller. Multiple sets of cutting blades capable of slitting the fabric are disposed on the cutting shaft. The cutting blades are disposed on a second guide roller. A fabric pressing roller is disposed above the second guide roller. A finished product recycling rack is disposed below the second guide roller.

[0012] Furthermore, the first crank mechanism includes a needle bar eccentric wheel disposed on the transmission shaft and a needle bar drive rocker arm disposed on the sewing needle rotation shaft, and a needle bar drive connecting rod is disposed between the needle bar eccentric wheel and the needle bar drive rocker arm.

[0013] Furthermore, the second crank mechanism includes a hook eccentric wheel disposed on the drive shaft and a hook swing rod disposed on the hook line assembly, with a hook connecting rod disposed between the hook eccentric wheel and the hook swing rod.

[0014] Furthermore, the sewing needle assembly includes a first needle bar drive rocker arm disposed on the sewing needle rotation shaft, a second needle bar drive rocker arm hinged to the first needle bar drive rocker arm, a rocker arm fixing block disposed on the second needle bar drive rocker arm, a needle bar guide seat disposed on one side of the rocker arm fixing block, a needle bar inserted through the needle bar guide seat, a needle row disposed below the needle bar, and multiple sets of sewing needles disposed on the needle row.

[0015] Furthermore, the paddle eccentric mechanism includes a paddle eccentric wheel mounted on the transmission shaft and two sets of paddle rocker arm bearing fixing seats mounted vertically on the movable base. A paddle rocker arm shaft is provided between the two sets of paddle rocker arm bearing fixing seats. An upper paddle rocker arm and a lower paddle rocker arm are provided on the paddle rocker arm shaft. A first paddle connecting rod is provided between the lower paddle rocker arm and the paddle eccentric wheel. The paddle eccentric mechanism also includes a paddle and a guide seat mounted on the sewing needle plate. A guide block is provided on the guide seat. One side of the guide block is connected to the paddle, and a second paddle connecting rod is provided between the other side of the guide block and the upper paddle rocker arm.

[0016] In summary, the advantages of this invention over the prior art are:

[0017] This invention addresses the shortcomings of existing multi-needle shuttleless slitting sewing machines. Through its structural design, this invention offers the following advantages: The multi-needle double-head shuttleless slitting sewing machine employs a dual-head design with a slitting cutter, simultaneously performing pattern sewing and sewing. The pattern sewing section utilizes the working principle of traditional sewing machinery, while the sewing section is achieved by multiple sets of biasing mechanisms linked together to swing up and down, forward and backward, and left and right to complete the sewing work. This allows one machine to function as two traditional shuttleless slitting sewing machines, reducing floor space, lowering costs, and improving production efficiency through a simple and convenient structure. Attached Figure Description

[0018] Figure 1 This invention is three-dimensional. Figure 1 ;

[0019] Figure 2 For the present invention Figure 1 Enlarged view of section A;

[0020] Figure 3 For the present invention Figure 1 Enlarged view of section B;

[0021] Figure 4 This is a front view of the present invention;

[0022] Figure 5 This is a partial three-dimensional view of the present invention;

[0023] Figure 6 This is a partial cross-sectional view of the present invention;

[0024] Figure 7 For the present invention Figure 5 Partial view at point D;

[0025] Figure 8 For the present invention Figure 6 Partial view at point E;

[0026] Figure 9For the present invention Figure 6 Partial view at point F. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figure 1-9 A multi-needle double-head shuttleless slitting sewing machine includes a base 1, on which a pattern sewing mechanism 2 is fixedly mounted to sew a pattern onto the fabric. A straight sewing mechanism 3 for sewing the edges of the slitting fabric is movably mounted on the base 1. The front end of the pattern sewing mechanism 2 is connected to a raw material transmission mechanism 4 that fixes and rotates to transport the fabric. The rear end of the straight sewing mechanism 3 is connected to a finished slitting mechanism 5 that divides the sewn fabric into strips and collects them. The pattern sewing mechanism 2 and the straight sewing mechanism 3 are directly connected for transmission.

[0029] Workflow:

[0030] The fabric to be sewn with a pattern is placed on the raw material transmission mechanism 4 and pulled to the finished product slitting mechanism 5 for fixation. After the machine is started, the raw material transmission mechanism 4 conveys the fabric to the pattern sewing mechanism 2. After the pattern sewing mechanism 2 sews the desired pattern onto the fabric, it is conveyed to the straight sewing mechanism 3 for edge sealing. After the edge sealing is completed, it is conveyed to the finished product slitting mechanism 5 for finished product slitting and cutting. Finally, the fabric is rolled up. This allows pattern sewing and edge sewing to be completed on the same machine, eliminating the cumbersome process of sewing the pattern on one sewing machine and then sewing the edge on another. One machine performs the functions of two machines, reducing machine footprint, lowering costs, and improving production efficiency.

[0031] The base 1 of the present invention includes two sets of lower bases 101, and an upper fixed base 102 is provided above the two sets of lower bases 101. A fixing block 103 is provided at both ends of the upper fixed base 102. An adjustment component 104 is provided on one side of the two sets of fixing blocks 103, and two sets of guide rails 105 are provided on the other two sides.

[0032] The front side of the base 1 is the same as that of a traditional shuttleless slit sewing machine, used to fix and install the pattern sewing mechanism 2, motor, adjustment component 104, and material transmission mechanism 4. The rear side is provided with multiple sets of guide rails 105, on which the straight sewing mechanism 3 can move left and right to cooperate with the pattern sewing mechanism 2 for adjustment.

[0033] The pattern sewing mechanism 2 of the present invention includes a sewing needle fixing seat 201 disposed between two sets of fixing blocks 103. The sewing needle fixing seat 201 is provided with multiple sets of needle sewing components 202 on one side and a conveying guide rod 203 that can smoothly convey the fabric to the straight sewing mechanism 3 on the other side. A fabric conveying mechanism 204 is provided on one side of the needle sewing components 202.

[0034] The pattern sewing mechanism 2 is mainly used for pattern sewing. It works on the same principle as a traditional shuttleless strip sewing machine. After the needle sewing component 202 is driven by the motor to sew the required pattern on the fabric, it is smoothly conveyed to the straight edge sewing mechanism 3 by the conveyor guide rod 203 for edge sealing of the fabric.

[0035] The straight sewing mechanism 3 of the present invention includes a movable base 301 that can move left and right on two sets of guide rails 105. Each set of movable bases 301 is provided with multiple sets of bearings 3011. A transmission shaft 302 is provided between the bearings 3011. One end of the transmission shaft 302 is hinged to a transmission synchronous pulley 303, and the other end is provided with a paddle eccentric mechanism 100. One set of movable bases 301 is provided with a servo motor 304. The servo motor 304 is hinged to a motor synchronous pulley 305. A connection is provided between the motor synchronous pulley 305 and the transmission synchronous pulley 303. The device includes a transmission belt 306, a fixed crossbeam 307 between the two sets of movable bases 301, a sewing needle rotating shaft 308 on the fixed crossbeam 307, multiple sets of sewing needle assemblies 309 on the sewing needle rotating shaft 308, a sewing needle plate 310 below the sewing needle assembly 309, a hook assembly 311 below the sewing needle plate 310, two sets of first crank mechanisms 312 between the transmission shaft 302 and the sewing needle rotating shaft 308, and two sets of second crank mechanisms 313 between the transmission shaft 302 and the hook assembly 311.

[0036] The movable base 301 can move left and right on the guide rail 105 on the base 1 for adjustment. When the straight sewing mechanism 3 is working, the independent servo motor 304 rotates. The motor synchronous wheel 305 drives the transmission synchronous wheel 303 to rotate through the transmission belt 306, thereby causing the transmission shaft 302 to rotate. When the transmission shaft 302 rotates, it drives the first crank mechanism 312 and the second crank mechanism 313. The first crank mechanism 312 drives the sewing needle rotating shaft 308 to work the sewing needle assembly 309. The second crank mechanism 313 drives the hook assembly 311 to work. The eccentric mechanism 100 set at the other end of the transmission shaft 302 also works as the transmission shaft 302 rotates.

[0037] The raw material transmission mechanism 4 of the present invention includes a fabric guide frame 401. Multiple sets of fabric support frames 402 are provided on one side of the fabric guide frame 401, and a machine adjustment workbench 403 is provided on the other side. Two sets of guide shafts 404 are provided on one side of the machine adjustment workbench 403.

[0038] The material transmission mechanism 4, like the transmission sewing machine, feeds the fabric forward by rotating. The operator stands on the adjustment workbench 403 to thread the fabric, making it easier to adjust the machine positioning and pressure according to the fabric width.

[0039] The finished product slitting mechanism 5 of the present invention includes two sets of first fixing plates 501 and one set of second fixing plates 502 disposed on the fixed crossbeam 307. A first guide roller 503 is disposed between the two sets of first fixing plates 501. A cutting shaft 504 is disposed on one side of the first guide roller 503. Multiple sets of cutting blades 505 capable of slitting fabric are disposed on the cutting shaft 504. A second guide roller 506 is disposed on the cutting blade 505. A fabric pressing roller 507 is disposed above the second guide roller 506. A finished product recycling rack 508 is disposed below the second guide roller 506.

[0040] When the fabric passes through the finished product slitting mechanism 5, it is cut into strips by the cutting blade 505, and the recycling rack 508 rolls up the cut fabric strips for storage.

[0041] The first crank mechanism 312 of the present invention includes a needle bar eccentric wheel 3121 disposed on the transmission shaft 302 and a needle bar transmission swing rod 3122 disposed on the sewing needle rotation shaft 308, and a needle bar transmission connecting rod 3123 is disposed between the needle bar eccentric wheel 3121 and the needle bar transmission swing rod 3122.

[0042] When the drive shaft 302 rotates, the movement trajectory of the needle bar eccentric wheel 3121 causes the needle bar drive linkage 3123 to move up and down, and the needle bar drive swing rod 3122 and the sewing needle rotating shaft 308 also move back and forth with the needle bar drive linkage 3123.

[0043] The second crank mechanism 313 of the present invention includes a hook eccentric wheel 3131 disposed on the transmission shaft 302 and a hook swing rod 3132 disposed on the hook line assembly 311, and a hook connecting rod 3133 is disposed between the hook eccentric wheel 3131 and the hook swing rod 3132.

[0044] When the drive shaft 302 rotates, the movement trajectory of the hook eccentric wheel 3131 causes the hook connecting rod 3133 to swing back and forth, and the swing rod 3132 and the hook line assembly 311 to swing back and forth.

[0045] The sewing needle assembly 309 of the present invention includes a first needle bar drive swing arm 3091 disposed on a sewing needle rotation shaft 308, a second needle bar drive swing arm 3092 hinged to the first needle bar drive swing arm 3091, a swing element fixing block 3093 disposed on the second needle bar drive swing arm 3092, a needle bar guide seat 3094 disposed on one side of the swing element fixing block 3093, a needle bar 3095 inserted through the needle bar guide seat 3094, a needle row 3096 disposed below the needle bar 3095, and a plurality of sewing needles 3097 disposed on the needle row 3096.

[0046] When the sewing needle rotating shaft 308 rotates back and forth, it drives the first needle bar transmission swing arm 3091 to move up and down. The up and down movement of the first needle bar transmission swing arm 3091 simultaneously drives the second needle bar transmission swing arm 3092 to move up and down. The up and down movement of the second needle bar transmission swing arm 3092 simultaneously drives the swing fixing block 3093 and the needle bar 3095 to move up and down within the needle bar guide seat 3094. Multiple sets of needle bars 3095 drive the needle row 3096 and the sewing needle 3097 to perform up and down sewing movements.

[0047] The paddle eccentric mechanism 100 of the present invention includes a paddle eccentric wheel 1001 disposed on the transmission shaft 302 and two sets of paddle rocker arm bearing fixing seats 1002 disposed vertically on the movable base 301. A paddle rocker arm shaft 1003 is disposed between the two sets of paddle rocker arm bearing fixing seats 1002. An upper paddle rocker arm 1004 and a lower paddle rocker arm 1005 are disposed on the paddle rocker arm shaft 1003. A first paddle connecting rod 1006 is provided between the paddle eccentric wheel 1001 and the paddle eccentric mechanism 100. The paddle eccentric mechanism 100 also includes a paddle 1007 and a guide seat 1008 provided on the sewing needle plate 310. A guide block 1009 is provided on the guide seat 1008. One side of the guide block 1009 is connected to the paddle 1007, and the other side is provided with a second paddle connecting rod 1010 between it and the paddle upper swing rod 1004.

[0048] When the drive shaft 302 rotates, the movement trajectory of the paddle eccentric wheel 1001 causes the first paddle connecting rod 1006 to move back and forth. The back and forth movement of the first paddle connecting rod 1006 causes the lower paddle swing rod 1005 to rotate in both directions, which in turn drives the paddle swing rod shaft 1003 and the upper paddle swing rod 1004 to rotate in both directions. The upper paddle swing rod 1004 drives the paddle 1007 and the second paddle connecting rod 1010 to move back and forth on the guide seat 1008.

[0049] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-needle double-head shuttleless slitting sewing machine, characterized in that: The device includes a base (1), on which a pattern sewing mechanism (2) is fixedly installed to sew patterns onto fabric. A straight edge sewing mechanism (3) for sewing the edges of strips of fabric is movably installed on the base (1). The front end of the pattern sewing mechanism (2) is connected to a raw material transmission mechanism (4) for fixing and rotating the fabric. The rear end of the straight edge sewing mechanism (3) is connected to a finished product slitting mechanism (5) for dividing the sewn fabric into strips and collecting them. The pattern sewing mechanism (2) and the straight edge sewing mechanism (3) are directly connected for transmission. The base (1) includes two sets of lower bases (101), and an upper fixed seat (102) is provided above the two sets of lower bases (101). A fixing block (103) is provided at both ends of the upper fixed seat (102). An adjustment component (104) is provided on one side of the two sets of fixing blocks (103), and two sets of guide rails (105) are provided on the other two sides. The straight sewing mechanism (3) includes a movable base (301) that can move left and right on two sets of guide rails (105). Each set of movable bases (301) is provided with multiple sets of bearings (3011). A transmission shaft (302) is provided between the bearings (3011). One end of the transmission shaft (302) is hinged to a transmission synchronous wheel (303), and the other end is provided with a paddle eccentric mechanism (100). One set of movable bases (301) is provided with a servo motor (304). The servo motor (304) is hinged to a motor synchronous pulley (305), and a transmission belt (306) is provided between the motor synchronous pulley (305) and the transmission synchronous pulley (303). A fixed crossbeam (307) is provided between the two sets of moving bases (301). A sewing needle rotating shaft (308) is provided on the fixed crossbeam (307), and multiple sets of sewing needle assemblies (309) are provided on the sewing needle rotating shaft (308). A sewing needle plate (310) is provided below the sewing needle assembly (309). The paddle eccentric mechanism (100) includes a paddle eccentric wheel (1001) mounted on the transmission shaft (302) and two sets of paddle rocker arm bearing fixing seats (1002) mounted vertically on the movable base (301). A paddle rocker arm shaft (1003) is provided between the two sets of paddle rocker arm bearing fixing seats (1002). An upper paddle rocker arm (1004) and a lower paddle rocker arm (1005) are provided on the paddle rocker arm shaft (1003). The lower paddle rocker arm (1005) and... A first paddle connecting rod (1006) is provided between the paddle eccentric wheels (1001). The paddle eccentric mechanism (100) also includes a paddle (1007) and a guide seat (1008) provided on the sewing needle plate (310). A guide block (1009) is provided on the guide seat (1008). One side of the guide block (1009) is connected to the paddle (1007), and the other side is connected to the paddle upper swing rod (1004) with a second paddle connecting rod (1010).

2. The multi-needle double-head shuttleless slitting sewing machine according to claim 1, characterized in that: The pattern sewing mechanism (2) includes a sewing needle holder (201) disposed between two sets of fixed blocks (103). The sewing needle holder (201) is provided with multiple sets of needle sewing components (202) on one side and a conveying guide rod (203) that can smoothly convey the fabric to the straight sewing mechanism (3) on the other side. A fabric conveying mechanism (204) is provided on one side of the needle sewing components (202).

3. The multi-needle double-head shuttleless slitting sewing machine according to claim 2, characterized in that: A hook assembly (311) is provided below the sewing needle plate (310). Two sets of first crank mechanisms (312) are provided between the drive shaft (302) and the sewing needle rotation shaft (308). Two sets of second crank mechanisms (313) are provided between the drive shaft (302) and the hook assembly (311).

4. The multi-needle double-head shuttleless slitting sewing machine according to claim 3, characterized in that: The raw material transmission mechanism (4) includes a fabric guide frame (401), on one side of the fabric guide frame (401) are multiple sets of fabric support frames (402), and on the other side is a machine adjustment workbench (403), and on one side of the machine adjustment workbench (403) are two sets of guide shafts (404).

5. The multi-needle double-head shuttleless slitting sewing machine according to claim 4, characterized in that: The finished product slitting mechanism (5) includes two sets of first fixing plates (501) and one set of second fixing plates (502) set on the fixed crossbeam (307). A first guide roller (503) is set between the two sets of first fixing plates (501). A cutter shaft (504) is set on one side of the first guide roller (503). Multiple sets of cutting blades (505) capable of slitting the fabric are set on the cutting shaft (504). A second guide roller (506) is set on the cutting blade (505). A fabric pressing roller (507) is set above the second guide roller (506). A finished product recycling rack (508) is set below the second guide roller (506).

6. The multi-needle double-head shuttleless slitting sewing machine according to claim 5, characterized in that: The first crank mechanism (312) includes a needle bar eccentric wheel (3121) disposed on the transmission shaft (302) and a needle bar drive rocker arm (3122) disposed on the sewing needle rotation shaft (308). A needle bar drive connecting rod (3123) is disposed between the needle bar eccentric wheel (3121) and the needle bar drive rocker arm (3122).

7. The multi-needle double-head shuttleless slitting sewing machine according to claim 6, characterized in that: The second crank mechanism (313) includes a hook eccentric wheel (3131) disposed on the drive shaft (302) and a hook swing rod (3132) disposed on the hook line assembly (311), and a hook connecting rod (3133) is disposed between the hook eccentric wheel (3131) and the hook swing rod (3132).

8. The multi-needle double-head shuttleless slitting sewing machine according to claim 7, characterized in that: The sewing needle assembly (309) includes a first needle bar drive swing arm (3091) mounted on the sewing needle rotation shaft (308), a second needle bar drive swing arm (3092) hinged to the first needle bar drive swing arm (3091), a swing block fixing block (3093) mounted on the second needle bar drive swing arm (3092), a needle bar guide seat (3094) mounted on one side of the swing block fixing block (3093), a needle bar (3095) inserted into the needle bar guide seat (3094), a needle row (3096) mounted below the needle bar (3095), and multiple sets of sewing needles (3097) mounted on the needle row (3096).

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