CN108060513B

CN108060513B - Automatic cutting and sewing equipment for safety belt

Info

Publication number: CN108060513B
Application number: CN201711258743.9A
Authority: CN
Inventors: 沈文科
Original assignee: Dongguan City Yousu Machinery Co ltd
Current assignee: Dongguan City Yousu Machinery Co ltd
Priority date: 2017-12-04
Filing date: 2017-12-04
Publication date: 2023-07-04
Anticipated expiration: 2037-12-04
Also published as: CN108060513A

Abstract

The invention provides automatic cutting and sewing equipment for a safety belt, and belongs to matched working equipment in the technical field of safety belts. The device comprises a frame, a braid feeding device, a laser ribbon cutting device, a safety belt braid end rewinding and sewing device, wherein the braid feeding device, the laser ribbon cutting device and the safety belt braid end rewinding and sewing device are sequentially arranged on the frame from right to left, and the rear of the safety belt braid end rewinding and sewing device is also provided with a belt needle feeding device. The safety belt webbing enters the laser webbing cutting device from the webbing feeding device, the laser webbing cutting device performs quantitative cutting to form a webbing, the webbing is used as an original webbing of a subsequent station, the original webbing is rewound at the end part of the safety belt webbing, and the sewing device performs assembly with a webbing needle to add a new webbing, and the new webbing is sewn to form the product of the invention. The whole process adopts mechanical automatic production, does not need manual operation, has high production efficiency and lower production cost, and ensures the product quality.

Description

Automatic cutting and sewing equipment for safety belt

Technical Field

The invention belongs to the technical field of safety belts and particularly relates to automatic cutting and sewing equipment for a safety belt.

Background

As automobiles become more and more convenient, the demands of the automobiles will also increase dramatically, and the automobile spare and accessory parts industry will also continue to keep a stable development situation. Safety belts are also in ever increasing demand as critical components in automotive safety devices. The safety belt is a passive safety system composed of parts such as a safety belt webbing, a retractor, a buckle, a plugboard and the like, the end part of the safety belt webbing is fixedly locked in the retractor through a belt needle, so that the safety belt webbing and the retractor are fixedly connected.

When the webbing loom weaves webbing, the disposable discharging is long, and the length of the actually needed safety belt webbing is cut off from the later stage. Shearing with scissors manually can cause the end part of the webbing of the safety belt to be loose, and the webbing is cut in a hot melting mode in the prior art. Such as the comparison patent: the utility model provides a just disclose a hot melt in the structure of cutting area (publication number CN 205058193U) and cut area structure, the structure mainly by workstation, electric fuse and temperature control device constitute, temperature control device install in workstation one side, the workstation corresponds both sides and installs electric fuse anchor clamps, anchor clamps internally mounted has heat conductor and temperature control device electric connection, electric fuse is installed in the workstation top through being connected with the heat conductor in the anchor clamps. Because the hot-melt cutting belt structure in this patent needs to be difficult to the accurate regulation and control to the temperature of electrothermal fuse at the application cutting belt that cuts the meshbelt process promptly, the meshbelt produces the turn-up or shrink after being heated very easily in the hot-melt process and forms the fold moreover, causes product quality unstable, also influences the assembly use of follow-up safety belt meshbelt, produces card material phenomenon at the in-process of meshbelt antedisplacement easily.

In addition, when the webbing and the webbing are assembled, the webbing is normally wrapped around the end portion of the webbing and restrained to the webbing by the sewing process for subsequent assembly with the retractor. However, in the existing assembly process of the safety belt webbing and the belt needle, manual feeding and manual assembly are mostly adopted, so that the problems of low production efficiency, poor consistency of product processing quality and the like exist, and the problems are to be solved so as to meet the requirements of industrial production.

Disclosure of Invention

The invention aims to provide the automatic cutting and sewing equipment for the safety belt, which has the advantages of high automation degree, high production efficiency and stable product quality, can carry out flush, smooth, quick and efficient cutting treatment on the safety belt braid, and simultaneously can carry out mechanical rewinding and sewing on the end part of the safety belt braid.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows.

The automatic cutting and sewing equipment for the safety belt is characterized by comprising a frame, a braid feeding device, a laser belt cutting device, a safety belt braid end rewinding and sewing device, wherein the braid feeding device, the laser belt cutting device and the safety belt braid end rewinding and sewing device are sequentially arranged on the frame from right to left, and the belt needle feeding device is further arranged behind the safety belt braid end rewinding and sewing device.

Further, the laser belt cutting device comprises a first power driving mechanism for pulling the woven belt to move along the guide rail and adjusting the conveying speed of the woven belt in real time, a detection device for detecting whether the woven belt and the cut belt are qualified, a photoelectric detection assembly for detecting and regulating the cutting length of the woven belt, a laser for carrying out equidistant laser cutting treatment on the woven belt at regular time and a belt cutting and pressing assembly for flattening the cut belt and the edge of the cut belt after the cutting treatment.

Further, the detection device comprises a first aluminum foil detection component and a second aluminum foil detection component, wherein the first aluminum foil detection component is arranged at the front end of the guide rail, the first aluminum foil detection component is positioned between the front idler wheel and the first power driving mechanism, and whether the webbing is qualified or not is detected at the position that the webbing starts to be transferred into the guide rail around the front idler wheel, so that unqualified parts in the webbing can be cut off in real time, and the unqualified cut webbing is pulled and guided to be transferred into the waste box through the second power driving mechanism; the second aluminum foil detection assembly is arranged on the rear end of the guide rail and is positioned on one side of the rear end of the second power driving mechanism, and the second aluminum foil detection assembly is used for detecting whether the cut strips after laser cutting and flattening treatment are sequentially completed along the guide rail are qualified or not, so that unqualified cut strips can be pulled and guided to be transferred into the waste box through the second power driving mechanism, and meanwhile, whether the first aluminum foil detection assembly is normally operated or not is checked by an alarm.

Further, the needle feeding device comprises a vibrating disc for containing the needles and orderly transferring the needles into the feeding guide rail, the feeding guide rail for receiving the needles output by the vibrating disc and transferring the needles into the needle steering device, the needle steering device for limiting and rotating the needles by 90 degrees, and the needle taking and discharging device for clamping and transferring the needles which are limited and rotated by 90 degrees in the needle steering device to a preset station.

Further, the end portion of the safety belt webbing is rewound, the sewing device comprises a webbing positioning and bending mechanism, a webbing feeding and shifting mechanism and a webbing sewing mechanism, wherein the webbing feeding and shifting mechanism is arranged above the webbing positioning and bending mechanism, the webbing sewing mechanism is arranged on the left side of the webbing positioning and bending mechanism, the webbing feeding device is used for carrying out webbing on an original webbing, the webbing positioning and bending mechanism is used for bending and rewinding the end portion of the original webbing so as to wrap the webbing into a new webbing, the webbing feeding and shifting mechanism is used for carrying out webbing on the webbing sewing mechanism, and the webbing overlapping end of the end portion of the new webbing is sewn by the webbing sewing mechanism.

Further, the braid positioning and bending mechanism comprises a bending support frame, a braid support plate, a braid positioning assembly and a braid bending assembly, wherein the braid support plate is fixed on the bending support frame, the braid positioning assembly and the braid bending assembly are arranged below the braid support plate, and the braid positioning assembly is positioned on the left side of the braid bending assembly;

a bending opening is formed in the braid supporting plate; the braid positioning assembly comprises a belt end limiting block, a limiting block up-down driving piece for driving the belt end limiting block to move up and down, and a limiting block left-right driving piece for driving the belt end limiting block to move left and right; the webbing bending assembly comprises a webbing bending block, a bending block up-and-down driving piece for driving the webbing bending block to move up and down, and a bending block left-and-right driving piece for driving the webbing bending block to move left and right; wherein the belt end limiting block and the braid bending block can pass through the bending opening to move up and down and left and right.

Further, the belt end limiting block is further provided with a belt sensor, the left end of the braid bending block is provided with an induction accommodating groove, and the belt end of the belt sensor can be accommodated in the induction accommodating groove.

Further, the belt conveying shifting mechanism comprises a belt conveying fixed plate and an entrainment component, and the entrainment component is driven to move left and right by a belt conveying driving piece arranged on the belt conveying fixed plate;

the clamping belt assembly comprises a shifting bottom plate, a clamping belt supporting plate, a webbing pressing block, a pressing block up-and-down driving piece for driving the webbing pressing block to move up and down, and a pressing block left-and-right driving piece for driving the webbing pressing block to move left and right, wherein the rear side of the clamping belt supporting plate is fixed on the shifting bottom plate; the clamping strap supporting plate is arranged above the braid supporting plate and can slide left and right along the braid supporting plate; the webbing pressing block is positioned above the entrainment supporting plate, and the new webbing is positioned between the webbing pressing block and the entrainment supporting plate and is clamped by the belt conveying driving piece to drive the webbing pressing block to shift.

Further, the braid sewing mechanism comprises a sewing machine and a presser foot bottom plate, wherein the sewing machine is provided with a left presser foot and a right presser foot which can be respectively pressed on a braid needle rolling end and a braid overlapping end of a new braid; wherein the bottom of the left presser foot is provided with an arc-shaped pressing groove which can be covered and pressed on the needle end of the braid roll.

Further, a thread shuttle detection device which is arranged for the thread shuttle is arranged below the sewing machine, specifically a color sensor is arranged in front of the thread shuttle, a sewing thread allowance detection mechanism is arranged below the thread shuttle, and a detection outer cover which is fixed at the bottom of the sewing machine is arranged outside the sewing thread allowance detection mechanism;

the sewing thread allowance detection mechanism comprises a thimble and a thimble driving piece for driving the thimble to move up and down, wherein the movable end of the thimble driving piece is fixedly connected with a sliding block, the thimble is inserted on the sliding block, and the fixed end of the thimble driving piece is suspended in the detection housing through a mounting plate; the detection housing is also internally provided with an in-place sensor, and the sliding block is provided with a corresponding sensing piece.

In the invention, a safety belt webbing enters a laser webbing cutting device from a webbing feeding device, the laser webbing cutting device performs quantitative cutting to form a webbing, the webbing is used as an original webbing of a subsequent station, the original webbing is rewound at the end part of the safety belt webbing, and a sewing device is used for assembling with the webbing to add a new webbing, and the new webbing is sewn to form the product of the invention. The whole process adopts mechanical automatic production, does not need manual operation, has high production efficiency and lower production cost, and ensures the product quality.

The laser belt cutting device of the safety belt can accurately and quickly cut the webbing in sections, and the uneven phenomena such as curled edges and wrinkles generated by traditional hot melt cutting are effectively avoided by adopting a laser cutting process, namely the laser belt cutting device can ensure that the webbing is accurately and quickly cut in sections, and the end part of the webbing after cutting is still kept level and flush; meanwhile, the photoelectric detection assembly is adopted to accurately detect and regulate the cutting length of the webbing, the first aluminum foil detection assembly and the second aluminum foil detection assembly are used for detecting whether the webbing and the cutting belt are qualified or not to effectively detect, unqualified cutting belts are subjected to belt withdrawal and recovery processing, and the belt withdrawal and recovery processing is matched with other stations in the safety belt production line to operate orderly, so that the high-efficiency operation of the safety belt production line is ensured.

In the invention, after the end part of the original braid enters the braid positioning and bending mechanism and the position is sensed by the belt sensor, the belt needle is pressed on the original braid by the belt needle discharging mechanism, the end part of the original braid is bent and rewound by the braid positioning and bending mechanism to wrap the belt needle to form a new braid, the new braid is brought to the braid sewing mechanism by the belt feeding and shifting mechanism, and the braid overlapping end of the end part of the new braid is sewn by the braid sewing mechanism. The whole process design is ingenious, the process is reasonable, the product consistency is good, the method is also applicable to safety belts of different models and styles, and the application range is wider. Compared with the prior art, the belt webbing and the belt needle are mechanically assembled by matching the webbing positioning and bending mechanism, the belt feeding and shifting mechanism, the webbing sewing mechanism and the belt needle discharging mechanism, and the end part of the webbing can be automatically bent and rewound without manual discharging and feeding, so that the production efficiency is improved, the production cost is reduced, and the product quality is more ensured.

The needle feeding device can automatically clamp and transfer the needle to a preset station, so that the labor cost is reduced, and the production efficiency is improved.

The thread shuttle detection device provided by the invention detects the color of the sewing thread and the allowance of the sewing thread, further ensures the reliability of the safety belt in the sewing process, improves the equipment performance through double detection, and improves the automation degree and the production efficiency.

In a word, the automatic cutting and sewing equipment for the safety belt provided by the invention can automatically complete the operations of cutting the safety belt webbing, feeding and assembling the belt needle, rewinding the end part of the webbing, sewing the webbing and the like, and has the advantages of high automation degree, high production efficiency, good product quality stability and the like.

Drawings

Fig. 1 is a schematic view of the overall structure of an apparatus according to an embodiment of the present invention.

Fig. 2 is a schematic view of the overall structure of the laser belt cutting device.

Fig. 3-4 are main structural schematic diagrams of the laser tape cutting device.

Fig. 5 is a schematic view of the structure of the pinch roller in the laser cutting device.

Fig. 6-7 are schematic structural views of a remainder gripping assembly in a laser tape cutting apparatus.

Fig. 8 is a schematic view of a tape cutting press assembly in a laser tape cutting apparatus.

Fig. 9 is a schematic structural view of a tape-withdrawal guide assembly in the laser tape cutting apparatus.

Fig. 10 is a schematic view of a tape withdrawal and pressing assembly in a laser tape cutting apparatus.

Fig. 11 is a schematic diagram of the overall structure of the needle-equipped feeding device.

Fig. 12 is a schematic view of the structure of the needle-equipped steering device in the needle-equipped feeding device.

Fig. 13 is a schematic structural view of a needle-containing material taking and discharging device in a needle-containing feeding device.

Fig. 14 is a schematic view of a part of the structure of lifting and clamping the belt needle in the belt needle material taking and discharging device.

Fig. 15 is a schematic view showing the overall structure of the end portion rewinding and sewing device of the webbing.

Fig. 16 is a schematic structural view of an end portion webbing retractor portion.

Fig. 17 is a schematic structural view of a webbing positioning bending mechanism.

Fig. 18 is a schematic structural view of the belt end stopper and the webbing bending block.

Fig. 19 is a front view of a webbing bending block.

Fig. 20 is an exploded schematic view of the operation of the webbing bending block to bend and rewind the original webbing.

Fig. 21 is a schematic structural view of the tape feed shift mechanism.

Fig. 22 is an enlarged view of a portion a in fig. 21.

Fig. 23 is a schematic structural view of a webbing sewing mechanism.

Fig. 24 is a schematic view of the structure of the left presser foot in the webbing sewing mechanism.

Fig. 25 is an effect diagram of the left and right presser feet of the sewing machine pressing a new webbing.

Fig. 26 is a schematic structural view of the thread bobbin detecting device.

Fig. 27 is a schematic view of the structure of fig. 26 with the color sensing cover removed.

Fig. 28 is a schematic view of the mounting structure of the sewing thread margin detecting mechanism and the side back cover.

Fig. 29 is a perspective view of the sewing thread remaining amount detecting mechanism.

Fig. 30 is a schematic structural view of the mounting plate.

Fig. 31 is a schematic view of the structure of the slider.

Detailed Description

In order to make the technical means, creation characteristics, achievement purposes and effects achieved by the present invention easily understood, the following embodiments are specifically described with reference to fig. 1 to 31 for an automatic belt cutting and sewing apparatus.

As shown in fig. 1, the automatic cutting and sewing equipment for the safety belt comprises a frame 1, a braid feeding device 2, a laser belt cutting device 3, an end part rewinding and sewing device 5 for the safety belt braid, wherein the braid feeding device 2, the laser belt cutting device 3 and the end part rewinding and sewing device 5 are sequentially arranged on the frame 1 from right to left, the belt needle feeding device 4 is further arranged behind the end part rewinding and sewing device 5 for the safety belt braid, and a braid buffer frame 7 is further arranged between the laser belt cutting device 3 and the end part rewinding and sewing device 5 for buffering and receiving the cut original braid 01.

The safety belt webbing enters the laser webbing cutting device 3 from the webbing feeding device 2, the laser webbing cutting device 3 performs quantitative cutting to form an original webbing 01, the original webbing 01 is rewound at the end part of the safety belt webbing, the sewing device 5 performs assembly with the webbing 02 to form a new webbing 03, and the new webbing is sewn to form the product of the invention.

As shown in fig. 2 to 10, the laser belt cutting device 3 comprises a first power driving mechanism for pulling the woven belt to move along the guide rail and adjusting the conveying speed of the woven belt in real time, a detection device for detecting whether the woven belt and the cut belt are qualified (namely, whether the woven belt is complete or not), a photoelectric detection assembly for detecting and regulating the cutting length of the woven belt, a laser 33 for carrying out equidistant laser cutting treatment on the woven belt at regular time, a belt cutting and pressing assembly 371 for flattening the woven belt and the edge of the woven belt, and a second power driving mechanism for guiding the unqualified cut belt to leave the guide rail and enter a waste box.

As shown in fig. 3-5: the first power driving mechanism comprises a driving roller 341 and a pressing roller 342, wherein the pressing roller 342 is positioned under the driving roller 341 and is used for clamping a webbing by matching with the driving roller 341 and transferring the webbing along a guide rail by rolling traction; as shown in fig. 5: the pinch roller 342 comprises a pinch roller 3420, a rotary encoder 3422 and a gap adjusting device for adjusting the gap between the pinch roller 3420 and the driving roller 341 for clamping the webbing, wherein the pinch roller 3420 is connected with the rotary encoder 3422, and the rotary encoder 3422 is used for measuring the rotation speed of the pinch roller 3420 and adjusting the speed of the pinch roller 3420; the gap adjusting device comprises four belt pressing guide rods 3421, a press wheel seat 3423, a belt pressing cushion block 3424, a lifting bottom plate 3425, adjusting screws 3426, compression springs 3427, a second air cylinder 3428, an air cylinder fixing plate 34281 and an air cylinder output end connector 34282, wherein the belt pressing wheel 3420 and a rotary encoder 3422 are erected on the press wheel seat 3423, the four belt pressing guide rods 3421 fixedly installed on the air cylinder fixing plate 34281 penetrate through the press wheel seat 3423 upwards and are connected with the press wheel seat 3423 in a sliding fit manner, the air cylinder output end connector 34282 extends upwards and is fixedly connected with the lifting bottom plate 3425, the lifting bottom plate 3425 is connected with the press wheel seat 3423 through the belt pressing cushion block 3424, a plurality of adjusting screws 3426 are arranged on the air cylinder fixing plate 34281, the adjusting screws 3426 extend upwards and are in abutting connection with the bottom surface of the lifting bottom plate 3425, the effective distances between the air cylinder fixing plate 34281 and the lifting bottom plate 3425 are adjusted, the lifting bottom plate 3423 and the belt pressing wheel seat 3420 are lifted and lowered, namely the belt pressing wheel seat 3420 is adjusted and the belt pressing wheels are adjusted and clamped and the belt pressing wheels 341 are adjusted and the belt pressing wheels 20 are adjusted and the belt pressing seat are different in thickness.

The photodetection unit is formed by arranging a first photodetection device 381, a second photodetection device 382, and a third photodetection device 383 on guide rails for transferring the webbing or cutting the webbing, respectively.

The detection device comprises a first aluminum foil detection component 351 and a second aluminum foil detection component 352, wherein the first aluminum foil detection component 351 is arranged at the front end of a guide rail for conveying the webbing, the first aluminum foil detection component 351 is positioned between the front gear roller 32 and the first power driving mechanism, and whether the webbing is qualified or not is detected at the position that the webbing starts to be conveyed around the front gear roller 32 and enters the guide rail, so that unqualified parts in the webbing can be instantly cut off, and the unqualified cut-off strips are pulled and guided to be conveyed into a waste box through the second power driving mechanism; the second aluminum foil detection assembly 352 is arranged at the rear end of the guide rail for transferring the woven belt and is positioned at one side of the rear end of the second power driving mechanism, and the second aluminum foil detection assembly 352 is used for detecting whether the cut belt after the laser cutting and flattening treatment is sequentially completed along the guide rail is qualified or not, so that unqualified cut belts can be pulled and guided to be transferred into the waste box through the second power driving mechanism, and meanwhile, whether the first aluminum foil detection assembly 351 is normally operated or not is checked by an alarm.

The laser pad plate which is arranged below the laser 33 and is arranged on the lower surface of the braid in a cushioning way is used for carrying out laser cutting treatment on the braid which is positioned on the laser pad plate in a matching way with the laser 33, so that the contact area of the laser pad plate and the lower surface of the braid is the effective cutting area of the laser 3 on the braid.

As shown in fig. 3, 4 and 8: the belt cutting and pressing assembly 371 comprises a first belt pressing fixing side plate 3710, a first belt pressing cylinder driving assembly 3711 and a belt cutting pressing block 3712, wherein: the first belt pressing cylinder driving assembly 3711 is fixedly installed on the first belt pressing fixing side plate 3710, and the first belt pressing cylinder driving assembly 3711 is used for driving the belt cutting pressing block 3712 to perform downward flattening operation on the end portion of the cut belt after cutting on the guide rail.

The second power driving mechanism comprises a belt-withdrawing driving roller 374, a belt-withdrawing driven roller 373 and a belt-withdrawing guide assembly 372, wherein the belt-withdrawing driving roller 374 and the belt-withdrawing driven roller 373 are arranged up and down oppositely, the belt-withdrawing driven roller 373 can regulate and control the gap between the belt-withdrawing driven roller 373 and the belt-withdrawing driving roller 374 for clamping the unqualified cut belt, the belt-withdrawing driven roller 373 extrudes the unqualified cut belt from top to bottom to be attached to the upper surface of the belt-withdrawing driving roller 374, and under the rotary rolling action of the belt-withdrawing driving roller 374, the unqualified cut belt moves reversely and enters a waste bin under the guiding action of the belt-withdrawing guide assembly 372; the belt-retreating driven wheel 373 comprises a third belt-retreating fixed side plate 3730, a third belt-retreating cylinder driving assembly 3731, a pinch roller mounting seat 3732 and a belt-retreating pinch roller 3733, wherein the third belt-retreating cylinder driving assembly 3731 is fixedly arranged on the third belt-retreating fixed side plate 3730, the belt-retreating pinch roller 3733 is arranged in the pinch roller mounting seat 3732, the third belt-retreating cylinder driving assembly 3731 is used for driving the pinch roller mounting seat 3732 and the belt-retreating pinch roller 3733 to downwardly extrude unqualified mesh belts to be attached to the upper surface of the belt-retreating driving roller 374, and therefore under the rotary rolling action of the belt-retreating driving roller 374, the unqualified cut belts reversely move and enter the waste bin under the guiding action of the belt-retreating guiding assembly 372.

As shown in fig. 3, 4 and 9: the strip-withdrawal guiding assembly 372 includes a second strip-withdrawal fixing side plate 3720, a second strip-withdrawal cylinder driving assembly 3721, a strip-withdrawal guiding block 3722, a guiding upper inclined surface 3723, a guiding bottom surface 3724 and a guiding notch 3725, wherein the second strip-withdrawal cylinder driving assembly 3721 is fixedly installed on the second strip-withdrawal fixing side plate 3720, the guiding upper inclined surface 3723 and the guiding bottom surface 3724 are both arranged in the strip-withdrawal guiding block 3722, a guiding notch 3725 capable of guiding and transferring the unqualified strip is formed between the guiding upper inclined surface 3723 and the guiding bottom surface 3724, and the second strip-withdrawal cylinder driving assembly 3721 is used for driving the strip-withdrawal guiding block 3722 to move downwards, so that the unqualified strip driven by the rotary rolling action of the strip-withdrawal driving roller 374 enters the waste bin along the guiding notch 3725 in the strip-withdrawal guiding assembly 372.

The laser belt cutting device 3 further comprises a winding preventing mechanism 31 for keeping the tension of the woven belt in the traction process, and the winding preventing mechanism is connected with the woven belt feeding device 2. The winding preventing mechanism 31 comprises a winding preventing bottom plate 311 and a plurality of lower baffle columns 312 which are staggered and arranged vertically and horizontally, the lower baffle columns 312 are fixedly arranged on the same side face of the winding preventing bottom plate 311, and the webbing sequentially bypasses the lower baffle columns 312 from bottom to top and enters a guide rail for transferring the webbing along the front baffle roller 32.

As shown in fig. 3 to 4 and fig. 6 to 7: the remainder clamping assembly 36 for clamping and separating the remainder generated in the process of cutting the webbing by the laser 33 from the guide rail, wherein the remainder clamping assembly 36 comprises an upper remainder clamping finger 361, a lower remainder clamping finger 362, a remainder clamping finger power assembly 363, a clamping finger bottom plate 364, a sliding block 365, a sliding rail 366, a buffering fixing block 367, a remainder unloading driving assembly 368, a piston rod 3681 and a clamping finger fixing frame 369, wherein: the upper and lower surplus material clamping fingers 361 and 362 are arranged side by side up and down, the upper and lower surplus material clamping fingers 361 and 362 are connected with the surplus material clamping finger power assembly 363, and the upper and lower surplus material clamping fingers 361 and 362 are mutually close or mutually separated under the driving action of the surplus material clamping finger power assembly 363 to clamp or loosen and unload the cut surplus material; the excess material clamping finger power assembly 363 is fixedly arranged on the clamping finger bottom plate 364, and a sliding block 365 arranged on the inner side of the clamping finger bottom plate 364 is connected with a sliding rail 366 arranged on the clamping finger fixing frame 369 in a left-right sliding fit manner; the residual material unloading driving assembly 368 is fixedly connected with the clamping finger fixing frame 369, a piston rod 3681 at the output end of the residual material unloading driving assembly 368 is connected with one end part of the buffering fixed block 367, and the other end part of the buffering fixed block 367 is connected with the clamping finger bottom plate 364, so that the residual material clamping finger power assembly 363 can drive the clamping finger bottom plate 364, the residual material clamping finger power assembly 363, the upper residual material clamping finger 361 and the lower residual material clamping finger 362 to slide in a left-right reciprocating manner along the sliding rail 366; thereby effecting clamping and stripping of the remainder of the web produced by the laser 33 during cutting of the web from the guide rail.

Wherein: the guide rail in the invention is formed by splicing a plurality of groups of guide upper plates and guide bottom plates in sequence side by side. The cut belt is a strip-shaped woven belt or a strip-shaped safety belt after the cutting treatment, namely the original woven belt 01 in the subsequent station.

As shown in fig. 11-14, the feeding device for the safety belt needle comprises a vibration disc 41 for containing the safety belt needle and sequentially transferring the safety belt needle into a feeding guide rail 42, a feeding guide rail 42 for receiving the safety belt needle output by the vibration disc 41 and transferring the safety belt needle into a safety belt needle steering device 43, a safety belt needle steering device 43 for limiting and rotating the safety belt needle by 90 degrees, and a safety belt needle taking and discharging device 44 for clamping and transferring the safety belt needle steering device 43 to a preset station (namely a webbing positioning and bending station).

The needle steering device 43 comprises a steering limiting block 431, a needle caulking groove 432, a feeding groove opening 4311, a clamping groove opening 4312, a steering driving motor 433 and a steering top plate 434, wherein: the steering limiting block 431 is fixedly arranged on the steering top plate 434, the needle-containing caulking groove 432 is arranged in the steering limiting block 431, the needle-containing caulking groove 432 is connected with the steering driving motor 433, and the steering driving motor 433 is used for driving the needle-containing caulking groove 32 to rotate at least 90 degrees; a feed slot 4311 which faces and aligns with the movement direction of the belt needle of the feed guide rail 42 is arranged on the steering limiting block 431, and when the belt needle caulking groove 432 is rotated and faces the feed slot 4311, the belt needle in the feed guide rail 42 can be directly moved into the belt needle caulking groove 432 along the feed slot 4311; the steering limiting block 431 is also provided with two clamping groove openings 4312, and the connection direction formed between the two clamping groove openings 4312 is mutually perpendicular to the feeding direction formed by the needle entering the feeding groove opening 4311 along the feeding guide rail 42; the needle-containing caulking groove 432 is driven by the steering driving motor 433 to rotate so that the needle in the needle-containing caulking groove 432 faces to the two clamping groove openings 4312 on the steering limiting block 431.

The needle taking and discharging device 44 comprises a needle clamping finger 441, a clamping driving cylinder assembly 442, a vertical sliding block 443, a clamping finger base plate 444, a vertical guide rail 445, a lifting driving cylinder assembly 446, a needle taking base plate 447, a horizontal sliding block 448, a horizontal guide rail 449, a horizontal movement driving assembly and a bracket vertical plate;

wherein: the clamping driving cylinder assembly 442 is connected with the needle clamping finger 441, and the clamping driving cylinder assembly 442 is used for driving the needle clamping finger 441 to be aligned downwards and clamping the needle positioned in the needle steering device 43 to rotate in place; the clamping driving cylinder assembly 442 is connected with the vertical sliding block 443 through the clamping finger base plate 444, the vertical sliding block 443 is in sliding fit connection with the vertical guide rail 445, the vertical guide rail 445 is fixedly arranged on the lifting driving cylinder assembly 446, and the lifting driving cylinder assembly 446 is used for driving the vertical sliding block 443, the clamping finger base plate 444 and the clamping driving cylinder assembly 442 to move up or down along the vertical guide rail 445; the lifting driving air cylinder assembly 446 is fixedly connected with the needle taking bottom plate 447, a horizontal guide rail 449 fixedly mounted on a support vertical plate is in sliding fit connection with a horizontal sliding block 448 fixedly mounted on the needle taking bottom plate 447, and the horizontal moving driving assembly is used for driving the horizontal sliding block 448, the needle taking bottom plate 447 and the lifting driving air cylinder assembly 446 to reciprocate back and forth along the horizontal guide rail 449; thereby realizing that the belt needle is clamped and transferred to a preset station from bottom to top and from back to front.

A vibrator 421 is also mounted on the bottom surface of the feeding rail 42, and the vibrator 421 is configured to ensure that the tape needle located in the feeding rail 42 is moved into the tape needle steering device 43 in order.

The needle feeding device 4 can automatically clamp and transfer the needle 02 to a preset station, so that the labor cost is reduced, and the production efficiency is improved.

15-25, the end rewinding and sewing device 5 for the safety belt webbing comprises a webbing positioning and bending mechanism 51, a webbing shifting mechanism 52 and a webbing sewing mechanism 53, wherein the webbing shifting mechanism 52 and the webbing needle taking and discharging device 44 mainly act above the webbing positioning and bending mechanism 51, and the webbing sewing mechanism 53 is arranged on the left side of the webbing positioning and bending mechanism 51. The front of the braid positioning and bending mechanism 51 is also provided with a braid placing plate 56, which provides a relatively stable supporting zone for the new braid which is driven to move when the new braid is sewn, thereby avoiding the new braid from falling and affecting the sewing quality.

After the end part of the original webbing 01 enters the webbing positioning bending mechanism 51, the webbing needle discharging mechanism 54 presses the webbing needle 02 on the original webbing 01, the webbing positioning bending mechanism 51 bends and rolls back the end part of the original webbing 01 to wrap the webbing needle 02 to form a new webbing 03, the webbing feeding shifting mechanism 52 brings the new webbing 03 to the webbing sewing mechanism 53, and the webbing overlapping end of the end part of the new webbing 03 is sewn by the webbing sewing mechanism 53.

As shown in fig. 20, an unassembled flat webbing (the above-described cut webbing) is defined as an original webbing 01, a webbing in which a webbing 02 has been wrapped is defined as a new webbing 03, and an end portion of the new webbing 03 has a substantially cylindrical webbing needle end 031 and a flat webbing overlapping end 032 formed by a rewind surplus.

In this embodiment, as shown in fig. 16, after the belt needle 02 is opened and closed by the belt needle clamping fingers 441 of the belt needle taking and feeding device 44, the belt needle clamping fingers 441 are sent to the upper part of the webbing positioning and bending mechanism 51, after the original webbing 01 is in place, the belt needle clamping fingers 441 descend to press the belt needle 02 on the webbing, after the end part of the original webbing 01 is rewound to wrap the belt needle 02, the belt needle clamping fingers 441 are opened, ascended, and then move back to the original position, and the material taking and feeding actions are repeated.

As shown in fig. 17-19, the webbing positioning and bending mechanism 51 includes a bending support frame 511, a webbing support plate 512, a webbing positioning assembly 513 and a webbing bending assembly 514, wherein the webbing support plate 512 is fixed on the bending support frame 511, the webbing positioning assembly 513 and the webbing bending assembly 514 are arranged below the webbing support plate 512, and the webbing positioning assembly 513 is located on the left side of the webbing bending assembly 514.

The webbing support plate 512 is provided with a bending opening 5121; the webbing positioning assembly 513 includes a belt end stopper 5131, a stopper up-down driving member 5132 for driving the belt end stopper 5131 to move up and down, and a stopper left-right driving member 5133 for driving the belt end stopper 5131 to move left-right; the webbing bending assembly 514 comprises a webbing bending block 5141, a bending block up-and-down driving member 5142 for driving the webbing bending block 5141 to move up and down, and a bending block left-and-right driving member 5143 for driving the webbing bending block 5141 to move left and right; the belt end stopper 5131 and the webbing bending block 5141 can move up and down and left and right through the bending opening 5121.

The belt end limiting block 5131 is further provided with a belt sensor 515, the left end of the braid bending block 5141 is provided with an induction accommodating groove 51411, the belt end 5151 of the belt sensor 515 can be accommodated in the induction accommodating groove 51411, and the belt end 5151 is positioned below the upper end face of the belt end limiting block 5131. By arranging the belt sensor 515, the automation degree of the equipment is further improved, the belt arrival material is sensed, a foundation is provided for subsequent ribbon rewinding and bending, and the reliability of the whole equipment is further improved.

The belt end limiting block 5131 and the braid bending block 5141 can be driven to move by the driving piece in the up-down left-right direction, the position is flexible, the actions of lifting up the material, bending and descending the blank for material moving can be more automatically and effectively completed, meanwhile, the left-right direction positions of the belt end limiting block 5131 and the braid bending block 5141 are adjustable, the clamping and discharging positions of the belt needle 02 are fixed, the end positions of the original braid 01 are changeable, and therefore new braids with different rewinding degrees can be manufactured according to different model requirements, the application range is wide, and the practicability is strong. The braid bending block 5141 moves upwards and downwards, a series of actions lead the end part of the original braid to be bent, and the mechanical action design is ingenious and no manual operation is needed.

The webbing bending block 5141 has an "l" -shaped vertical section, and has a lower right corner forming a bending groove 51412, the bending groove 51412 having a bending groove side face 51413 and a bending groove top face 51414, wherein the bending groove top face 51414 is a downward inclined face. The intersection of the bend groove vertical face 51413 and the bend groove top face 51414 is provided as an arcuate bend groove interface 51415. The bending groove 51412 can effectively bend and rewind the end of the original webbing 01 to form the shape effect of the webbing winding needle, and the webbing winding needle end 031 of the new webbing 03 is accommodated in the bending groove 1412, so that the webbing 02 is not easy to separate. In addition, the top surface 51414 of the bending groove is an inclined surface which is inclined downwards, so that the end part to be sewn of the original braid 01 can be ensured to be pressed downwards without tilting, and is enabled to be attached to the original braid in parallel, the position of the belt needle 02 is further limited, and a reliable basis is provided for subsequent belt feeding displacement.

When the belt end limiting block 5131 and the webbing bending block 5141 are in the original state, the upper end face of the webbing bending block 5141 is approximately leveled with the upper face of the webbing supporting plate 512, the belt end limiting block 5131 is close to the webbing bending block 5141, the belt sensing end 5151 of the belt sensor 515 is accommodated in the sensing accommodating groove 51411, and the upper end face of the belt sensing end 5151 is approximately leveled with the upper end face of the webbing bending block 5141.

As shown in fig. 16, 21 and 22, the belt shift mechanism 52 includes a belt fixing plate 521 mounted behind the webbing positioning and bending mechanism 51, and a belt clamping assembly 523, and the belt clamping assembly 523 is driven to move left and right by a belt driving member 522 mounted on the belt fixing plate 521. The entrainment component 523 comprises a displacement bottom plate 524, an entrainment supporting plate 525, a webbing pressing block 526, a pressing block up-and-down driving piece 527 for driving the webbing pressing block 526 to move up and down, and a pressing block left-and-right driving piece 528 for driving the webbing pressing block 526 to move left and right, wherein the rear side of the entrainment supporting plate 525 is fixed on the displacement bottom plate 524, the pressing block left-and-right driving piece 528 is arranged at the upper end of the displacement bottom plate 524, the movable end of the pressing block left-and-right driving piece 528 faces left and is fixed with the pressing block up-and-down driving piece 527, and the movable end of the pressing block up-and-down driving piece 527 faces down and is fixedly connected with the right end of the webbing pressing block 526 through a pressing block connecting plate 5261; the clamping support plate 524 is pi-shaped, is positioned above the webbing support plate 512 and can slide left and right along the webbing support plate 512; the webbing bar 526 is located above the entrainment support plate 525, and the new webbing 03 is located between the webbing bar 526 and the entrainment support plate 525 and is clamped and driven to move by the belt driving member 522. The webbing pressing block 526 and the clamping support plate 525 integrally cooperate to clamp a new webbing 03 so that the webbing pressing block moves relative to the webbing support plate 512 above the webbing pressing block, and therefore the webbing pressing block can be better clamped to complete transfer.

A pressing baffle 529 is also arranged on the clamping and supporting plate 525 and is parallel to the clamping and supporting plate 525, and the right end of the pressing baffle is tilted upwards to form a feeding belt guide angle 5291. A swage block 529 is located below the press attachment plate 5261, near the location of the braid press 526. So, former meshbelt is located presses material baffle 529 and smugglies between the backup pad 525 with smuggleing secretly, and is better spacing it, and the rollback of bending of former meshbelt tip of being convenient for advances in the space that the former meshbelt of direction that takes the guide angle can be better gets into presses material baffle and smuggleing secretly between the backup pad, avoids the card material.

The webbing auxiliary pressing assembly 55 is further arranged above the webbing positioning and bending mechanism 51 and comprises an auxiliary pressing frame 551, a pressing rod 553 and an auxiliary pressing driving piece 552 which is arranged on the auxiliary pressing frame 551 and drives the pressing rod 553 to move up and down. The lower end of the pressing rod 553 is also connected with a rod end pressing point 554, which is soft rubber, protects the webbing from hard contact.

As shown in fig. 17, a webbing guide assembly 516 is also mounted on the webbing support plate 512, and includes a guide bottom cushion plate 5161 and a webbing feed side baffle 5162, the guide bottom cushion plate 5161 being fixed to the right end face of the webbing support plate 12, the webbing feed side baffle 5162 being fixed to both sides of the guide bottom cushion plate 5161. When the braid enters the positioning and bending station, the braid guide assembly 516 guides the upper clamping and supporting plate 525 and enters between the pressing baffle 529 and the clamping and supporting plate 525, and manual feeding is not needed.

Referring to fig. 16 and 17, a layout of the entrainment member 523 of the tape feed shifting mechanism 52 is shown in its original, i.e., rightmost, position. The rightmost end of the clamping support plate 525 is propped against the leftmost end of the guiding base cushion plate 5161, and the plane height of the clamping support plate 525 is approximately equal to the plane height of the guiding base cushion plate 5161, so that the webbing can smoothly and smoothly transition from the webbing buffer frame 7 to the clamping support plate 525 through the webbing guiding assembly 516. The webbing pressing block 526 is positioned right above the left end of the clamping support plate 525, the needle clamping finger 441 is positioned between the clamping support plate 525 and the webbing bending block 5141, and the webbing end limiting block 5131 is positioned on the left side of the webbing bending block 5141. And the plunger 553 of the webbing assist pressure assembly 55 is located above the blank space (not shown) of the pressure plate 529 for pressure of the webbing. The webbing assist pressing assembly 55 can ensure that the original webbing does not shift when the end of the original webbing is bent, and ensure the stability and reliability of the bending and rewinding operation.

Fig. 21 is a state in which the new webbing 03 is brought to the leftmost side for the entrainment member 523 of the webbing shifting mechanism 52.

As shown in fig. 23-25, the webbing sewing mechanism 53 includes a sewing machine 531 and a presser foot plate 532, wherein the sewing machine 531 is provided with left and

right presser feet

533, 534 which are respectively pressed against a webbing needle end 031 and a webbing overlapping end 032 of a new webbing 03; wherein the bottom of the left presser foot 533 is provided with an arc-shaped pressing groove 5331, and the arc-shaped pressing groove 5331 can be covered and pressed on the webbing needle rolling end 031. The arc-shaped pressing groove 5331 corresponds to the outer contour shape of the webbing winding needle end 031, and can press the webbing winding needle end 5331 more firmly, so that the reliability of the sewing process of the sewing machine is improved.

The sewing machine 531 itself is a common device having left and

right presser feet

533, 534 which are driven to move up and down by the inside of the sewing machine 531.

When the sewing machine 531 is used for sewing, the end part of the new webbing 03 is clamped between the left and

right presser feet

533, 534 and the presser foot bottom plate 532, the whole structure is driven to move back and forth and left and right by the internal driving of the sewing machine 531, and the webbing overlapping part between the left and

right presser feet

533, 534 is sewn.

The bottom surface of the right presser foot 34 is opposite to the plane, and can be provided with wavy lines so as to increase the friction force of the presser belt, so that the new webbing 03 is not easy to separate when being driven to move back and forth and left and right, and the consistency and stability of the sewing result are ensured.

A feed sensor 535 is also provided on the right side of the sewing machine 531.

The end portion rewinding and sewing device of the webbing in this embodiment is a specific action process as follows.

1. The belt end stopper 5131, the webbing bending block 5141, and the entrainment component 523 are all in the original states described above.

2. The original webbing 01 is guided by the webbing guide assembly 516 from the webbing buffer frame 7 to be conveyed to the upper clamping support plate 525, enters between the material pressing baffle plate 529 and the clamping support plate 525, always reaches the upper end face of the webbing bending block 5141 along the clamping support plate 525 and is propped against the webbing end limiting block 5131 until the webbing sensor 515 senses the material, and the webbing end limiting block 5131 moves left and descends to a position not exceeding the upper plane of the webbing support plate 512, so that the action space of the webbing bending block 5141 and the subsequent webbing moving space are reserved.

3. The webbing bending block 5141 starts bending and rewinding the original webbing 01, during which the pressing rod 553 of the webbing assist pressing assembly 55 descends and the rod end pressing point 554 presses against the webbing on the entrainment support plate 525. The operation and effect of the webbing bending block 5141 are simplified from top to bottom in fig. 20. Fig. a shows the original webbing 01 reaching the upper end face of the webbing bending block 5141. Fig. B shows the webbing 02 held by the webbing grip finger 441 and placed on the original webbing 01. Fig. C shows the original webbing 01 end portion lifted by the rising of the webbing bending block 5141. The webbing bending block 5141 is moved rightward to bend the end portion of the original webbing 01. Fig. E shows the webbing bending block 5141 pressed down, the end of the original webbing 01 comprises the webbing 02 to form a rewinding effect, a new webbing 03 is formed, and the webbing winding needle end 031 of the new webbing 03 is accommodated in the bending groove 51412. (the actions of FIG. C and FIG. D may be performed simultaneously)

4. The needle grip fingers 441 release the needle 02 and rise back to the original position, the presser bar 553 rises, and the webbing press block 526 descends to grip the webbing overlapping end 032 of the new webbing 03 in cooperation with the entrainment support plate 525, as shown in fig. 22. The webbing bending block 5141 is raised and moved down back to be level with the upper plane of the webbing support plate 512, giving up the webbing feeding space of the entrainment member 523.

5. The entraining component 523 is driven by the belt feeding driving piece 522 to move leftwards along the webbing supporting plate 512 until the end of the new webbing 03 reaches the lower part of the left and

right presser feet

533, 534, and at this time, the left and

right presser feet

533, 534 are in a lifted standby working state. Then the webbing pressing block 526 moves right and rises, the left and

right presser feet

533, 534 press down, respectively press the webbing needle end 031 and the webbing overlapping end 032, and the sewing machine 531 starts to operate to stitch the webbing overlapping portion between the left and

right presser feet

533, 534.

6. The whole entrainment component 523 is retracted to the original position, and the belt end limiting block 5131 is lifted and moves right to approach the braid bending block 5141 to wait for receiving materials.

Compared with the prior art, the belt webbing positioning and bending mechanism 51, the belt webbing shifting mechanism 52, the belt webbing sewing mechanism 53 and the belt webbing taking and discharging device 44 are matched to realize mechanical assembly of the belt webbing and the belt webbing, and the belt webbing end can be automatically bent and rewound without manual discharging and feeding, so that the production efficiency is improved, the production cost is reduced, and the product quality is ensured.

As shown in fig. 26 to 31, a thread bobbin detecting device 6 provided for a thread bobbin 61 for discharging a sewing thread is provided below the sewing machine 531. The thread bobbin 61 in the present embodiment is a schematic view, and generally includes a fixed bobbin case and a built-in rotatable thread-releasing bobbin, and the specific structure thereof is not repeated.

A color sensor 62 is provided in front of the thread bobbin 61, and a sewing thread remaining amount detecting mechanism 63 is provided below the thread bobbin 61. A sewing machine 531 is provided with a detection housing 64 at the bottom and below the thread bobbin 61, and a sewing thread allowance detection mechanism 63 is arranged in the detection housing 64; the detecting housing 64 includes a side rear cover 641 and a front cover 642, the front cover 642 is connected with one side of the side rear cover 641 by a hinge plate, and a wire magnetic button 643 is further mounted on the side wall of the side rear cover 641, so that the front cover 642 can be automatically closed by suction.

The side cover 641 is fixed to the bottom of the sewing machine 531 via a first connector 66, the color sensor 62 is supported in front of the front cover 642 via a second connector 622, the front cover 642 is further provided with a front cover detection opening 6421 through which the sensing ray 621 of the color sensor 62 passes, and the color sensor 62 is further provided with a color sensing cover 65 outside.

As shown in fig. 28 and 29, the sewing thread remaining amount detecting mechanism 63 includes a needle 631 and a needle driving member 632 for driving the needle 631 to move up and down, a movable end 6321 of the needle driving member 632 is fixedly connected to a slider 633, the needle 631 is inserted into the slider 633, and a fixed end 6322 of the needle driving member 632 is suspended in the detecting housing 64 by being connected to a mounting plate 634 fixed to both sides of the side rear cover 641.

The side wall of the side rear cover 641 is provided with an in-place sensor 67, and the slider 633 is provided with a corresponding sensor piece 68. The in-place sensor 67 is an L-type photoelectric sensor, and its sensing part is transversely mounted; the sensing piece 68 is C-shaped and has a sensing notch 681.

A fixed block 635 is fixed to the rear wall of the side rear cover 641, a vertical sliding groove 6351 is formed in the fixed block 635, and the sliding block 633 can slide up and down along the sliding groove 6351. As shown in fig. 30 and 31, the sliding groove 6351 is T-shaped, the corresponding slider 633 has an i-shaped cross section, and the rear connecting portion 6331 is matched with the sliding groove 6351 in shape and size. Thus, the contact area between the slider 633 and the fixed block 635 can be increased, thereby improving the sliding stability.

The invention detects the color of the sewing thread and the allowance of the sewing thread aiming at the thread shuttle 61, further ensures the reliability of the safety belt in the sewing process, improves the equipment performance by double detection, and improves the automation degree and the production efficiency.

Color detection can eliminate human errors, the sensing ray 621 of the color sensor 62 passes through the front cover detection opening 6421 to reach the thread shuttle 61, and the thread shuttle 61 is correspondingly provided with a light hole for the color sensor 62 to sense sewing threads. The sewing threads with different colors are suitable for different safety belt model specifications, the detection result through the color sensor 62 is more accurate, and the product yield is further ensured.

In the invention, the needle 631 of the sewing thread allowance detection mechanism 63 can contact the sewing thread coiled on the thread shuttle 61, and a hole for the needle 631 to pass through and move is correspondingly formed on the shuttle shell of the thread shuttle 61. Needle driver 632 is a cylinder that is continuously driven to move needle 631 upward until it contacts the sewing thread on thread bobbin 61, and needle 631 will not rise. As the amount of thread in thread spool 61 decreases, needle 631 continues to rise, and sensor tab 68 also rises simultaneously. In this embodiment, the upper sensing end 682 of the sensing piece 68 is inserted between the sensing portions of the in-place sensor 67 to block the photoelectric signal, and when the in-place sensor 67 is continuously raised to resume the photoelectric signal, the indicator needle 631 reaches the upper limit, the allowance in the thread bobbin 61 is insufficient to complete the sewing, and the device will remind to replace the bobbin in the thread bobbin 61. The whole sewing thread allowance detection process is ingenious in design and simple in structure, the amount of the residual thread in the thread shuttle 61 is quantized, the sewing process is ensured to be always wired, and accordingly the reliability of equipment and the product yield are improved.

The foregoing is merely illustrative of the preferred embodiments of the present invention and is not intended to limit the embodiments and scope of the present invention, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present invention, and are intended to be included in the scope of the present invention.

Claims

1. The automatic cutting and sewing equipment for the safety belt is characterized by comprising a frame (1), a belt feeding device (2), a laser belt cutting device (3) and a belt webbing end rollback and sewing device (5) which are sequentially arranged on the frame (1) from right to left, wherein the belt needle feeding device (4) is further arranged behind the belt webbing end rollback and sewing device (5);

the end part rewinding and sewing device (5) of the safety belt webbing comprises a webbing positioning and bending mechanism (51), a webbing feeding and shifting mechanism (52) and a webbing sewing mechanism (53), wherein the webbing feeding and shifting mechanism (52) is arranged above the webbing positioning and bending mechanism (51), the webbing sewing mechanism (53) is arranged on the left side of the webbing positioning and bending mechanism (51), the webbing feeding device (4) is used for bringing the webbing (02) onto an original webbing (01), the webbing positioning and bending mechanism (51) is used for bending and rewinding the end part of the original webbing (01) so as to wrap the webbing (02) to form a new webbing (03), the webbing feeding and shifting mechanism (52) is used for bringing the new webbing (03) to the webbing sewing mechanism (53), and the webbing overlapping end of the end part of the new webbing (03) is sewn by the webbing sewing mechanism (53);

The braid positioning and bending mechanism (51) comprises a bending support frame (511), a braid support plate (512), a braid positioning component (513) and a braid bending component (514), wherein the braid support plate (512) is fixed on the bending support frame (511), the braid positioning component (513) and the braid bending component (514) are arranged below the braid support plate (512), and the braid positioning component (513) is positioned on the left side of the braid bending component (514); a bending opening (5121) is formed in the braid supporting plate (512); the braid positioning assembly (513) comprises a belt end limiting block (5131), a limiting block up-down driving piece (5132) for driving the belt end limiting block (5131) to move up and down, and a limiting block left-right driving piece (5133) for driving the belt end limiting block (5131) to move left and right; the webbing bending assembly (514) comprises a webbing bending block (5141), a bending block up-and-down driving piece (5142) for driving the webbing bending block (5141) to move up and down, and a bending block left-and-right driving piece (5143) for driving the webbing bending block (5141) to move left and right; wherein, the belt end limiting block (5131) and the braid bending block (5141) can pass through the bending opening (5121) to move up and down and left and right.

2. An automatic belt cutting and sewing apparatus according to claim 1, characterized in that the laser belt cutting device (3) comprises a first power driving mechanism for drawing the webbing along the guide rail and adjusting the conveying speed of the webbing in real time, a detecting device for detecting whether the webbing and the cut belt are qualified, a photoelectric detecting assembly for detecting and regulating the cutting length of the webbing, a laser (33) for performing equidistant laser cutting treatment on the webbing at regular intervals, and a belt cutting and pressing assembly (371) for flattening the cut belt and the cut belt edge after the cutting treatment.

3. The automatic belt cutting and sewing apparatus according to claim 2, wherein the detecting means includes a first aluminum foil detecting assembly (351) and a second aluminum foil detecting assembly (352), the first aluminum foil detecting assembly (351) is disposed on the front end of the guide rail, and the first aluminum foil detecting assembly (351) is disposed between the front rail roller (32) and the first power driving mechanism, and detects whether the webbing is acceptable or not at a position where the webbing starts to be transferred into the guide rail around the front rail roller (32), so that unqualified portions of the webbing can be cut off instantaneously, and the unqualified cut webbing is pulled and guided to be transferred into the scrap box by the second power driving mechanism; the second aluminum foil detection assembly (352) is arranged on the rear end of the guide rail and is positioned on one side of the rear end of the second power driving mechanism, the second aluminum foil detection assembly (352) is used for detecting whether the cutting belt after laser cutting and flattening treatment is qualified or not along the guide rail, unqualified cutting belts can be pulled and guided to be transferred into the waste box through the second power driving mechanism, and meanwhile, whether the first aluminum foil detection assembly (351) is normally operated or not is checked by an alarm.

4. The automatic belt cutting and sewing apparatus according to claim 1, wherein the belt needle loading device (4) includes a vibration plate (41) for holding the belt needles (02) and transferring the belt needles into the feed rail (42) in order, the feed rail (42) for receiving the belt needles (02) output by the vibration plate (41) and transferring the belt needles into the belt needle steering device (43), the belt needle steering device (43) for rotating the belt needles by a limit of 90 °, and the belt needle taking and discharging device (44) for holding and transferring the belt needles (02) rotated by a limit of 90 ° in the belt needle steering device (43) to a predetermined station.

5. The automatic belt cutting and sewing apparatus according to claim 1, wherein the belt end stopper (5131) is further provided with a belt sensor (515), and the left end of the webbing bending block (5141) is provided with an induction receiving groove (51411) into which the belt end (5151) of the belt sensor (515) is received in the induction receiving groove (51411).

6. The automatic belt cutting and sewing apparatus according to claim 1, wherein the belt shifting mechanism (52) comprises a belt fixing plate (521), and a belt clamping assembly (523), the belt clamping assembly (523) being driven to move left and right by a belt driving member (522) mounted on the belt fixing plate (521); the clamping belt assembly (523) comprises a shifting bottom plate (524), a clamping belt supporting plate (525), a webbing pressing block (526) and a pressing block up-down driving part (527) for driving the webbing pressing block (526) to move up and down, and a pressing block left-right driving part (528) for driving the webbing pressing block (526) to move left and right, wherein the rear side of the clamping belt supporting plate (525) is fixed on the shifting bottom plate (524), the pressing block left-right driving part (528) is arranged at the upper end of the shifting bottom plate (524), the movable end of the pressing block left-right driving part (528) faces left and is fixed with the pressing block up-down driving part (527), and the movable end of the pressing block up-down driving part (527) faces down and is fixedly connected with the right end of the webbing pressing block (526) through a pressing block connecting plate (5261); the clamping belt supporting plate (525) is arranged on the braid supporting plate (512) and can slide left and right along the braid supporting plate (512); the webbing pressing block (526) is positioned above the entrainment supporting plate (525), and the new webbing (03) is positioned between the webbing pressing block (526) and the entrainment supporting plate (525) and is driven by the belt conveying driving piece (522) to move.

7. The automatic belt cutting and sewing apparatus as claimed in claim 1, characterized in that the webbing sewing mechanism (53) comprises a sewing machine (531) and a presser foot plate (532), wherein the sewing machine (531) is provided with left and right presser feet (533, 534) which are respectively pressed against the webbing take-up end (031) and the webbing overlapping end (032) of the new webbing (03); wherein, the bottom of the left presser foot (533) is provided with an arc-shaped pressing groove (5331), and the arc-shaped pressing groove (5331) can be covered and pressed on the braid needle rolling end (031).

8. The automatic belt cutting and sewing apparatus according to claim 7, characterized in that a thread bobbin detecting device (6) provided for a thread bobbin (61) provided below the sewing machine (531), specifically, a color sensor (62) is provided in front of the thread bobbin (61), a sewing thread remaining amount detecting mechanism (63) is provided below the thread bobbin (61), and a detecting housing (64) fixed to the bottom of the sewing machine (531) is provided outside the sewing thread remaining amount detecting mechanism (63); the sewing thread allowance detection mechanism (63) comprises a thimble (631) and a thimble driving piece (632) for driving the thimble (631) to move up and down, a movable end (6321) of the thimble driving piece (632) is fixedly connected with a sliding block (633), the thimble (631) is inserted on the sliding block (633), and a fixed end (6322) of the thimble driving piece (632) is suspended in the detection housing (64) through a mounting plate (634); an in-place sensor (67) is also installed in the detection housing (64), and a corresponding sensor sheet (68) is installed on the sliding block (633).