CN220099374U

CN220099374U - Automatic bottom thread connecting device of flat-seam type sewing equipment

Info

Publication number: CN220099374U
Application number: CN202321011790.4U
Authority: CN
Inventors: 章玉泉
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-04-28
Filing date: 2023-04-28
Publication date: 2023-11-28
Anticipated expiration: 2033-04-28

Abstract

The utility model discloses an automatic bottom thread receiving device of a flat-seam type sewing device, which comprises a machine head, a platen, a rotating shuttle, a thread quantity detector, a motor winder, a bottom thread clamp, a bottom thread breaker and a bottom thread presser, wherein the machine head is fixed on the platen, and the rotating shuttle is arranged on a shaft positioned below the platen; the side of the rotating shuttle is provided with a line quantity detector, the front of the rotating shuttle is provided with a motor winder, and the side front of the rotating shuttle is sequentially provided with a bottom line pressing device, a bottom line breaking device and a bottom line clamping device. Under the condition of the existing sewing machine function, the automatic bottom line connecting, bottom line pressing, bottom line winding and bottom line cutting functions are added, when a worker needs to replace cloth cut pieces or complete specific clothes making actions after finishing automatic bottom line cutting in one clothes making process, the automatic bottom line changing and cutting machine automatically controls all electromagnets, motors and electromagnetic valves under a machine platform by a system host machine to complete automatic wiring, automatic line pressing, automatic line winding and automatic line breaking processes in a very short time, and the defects of low efficiency and high cost of manual bottom line changing are overcome.

Description

Automatic bottom thread connecting device of flat-seam type sewing equipment

Technical Field

The utility model belongs to the field of garment processing and sewing equipment, and particularly relates to an automatic bottom thread connecting device of flat-seam sewing equipment. The utility model also relates to an automatic bottom thread receiving method of the automatic bottom thread receiving device of the flat-seam sewing equipment.

Background

People cannot leave the clothes to eat, and the clothes making cannot leave the sewing equipment. Sewing of clothing is mainly divided into two types according to stitch, one is chain stitch and the other is lock stitch, wherein sewing equipment capable of sewing out lock stitch is called a lockstitch sewing machine. The lockstitch sewing machine of the present invention includes various rotary shuttle lockstitch machines such as lockstitch sewing machines and embroidery machines. The inner part of the lockstitch sewing machine is provided with a rotating shuttle, a shuttle shell is arranged in the rotating shuttle, a bobbin wound with a bottom thread is arranged in the shuttle shell, and the lockstitch sewing machine is matched with a needle for sewing. The flat seaming machine has a disadvantage that after the rotating shuttle finishes the bobbin thread of one bobbin thread, another second bobbin thread wound with the bobbin thread is replaced, and because the bobbin thread is positioned in the rotating shuttle below the platen, the quantity of thread used during sewing clothing can not be observed, and the quantity of thread wound on the bobbin thread is very small, when the bobbin thread is used up, an operator can not find the bobbin thread in time, so that most of the cases are that the operator can find the bobbin thread without a long distance, and the operator is required to frequently stop to replace the bobbin thread when the operator is required to newly sew the operating piece without the bobbin thread. Every time the bobbin thread of one bobbin thread is used up, the second bobbin thread wound by the second bobbin thread is replaced in time, so that the labor intensity of workers is increased, the production efficiency is reduced, the production cost of enterprises is increased, and the whole economic benefit of the enterprises is not improved. The prior art basically simulates the operation process of manual bobbin thread replacement, such as an automatic bobbin thread replacement device and method of Chinese patent No. CN201610734226.3, a bobbin thread replacement mechanism and a sewing machine of Chinese patent No. CN201510514290.6, an automatic bobbin thread replacement device of Chinese patent No. CN201510050824.4 and the like, and the domestic or foreign patents are all characterized in that empty bobbin shells are taken out and replaced by full bobbin shells with good bobbin thread, and then the full bobbin shells are installed by machines, so that a mode of manual bobbin thread replacement is simulated, but time is not saved, the structure is complicated, the cost is too high, and the improvement efficiency is extremely limited, so that the automatic bobbin thread replacement device has commercial application only in some special models until now, and a large number of flat sewing machines can only manually replace the bobbin thread. The invention is innovated in that when the machine winds the shuttle peg, the shuttle peg is not required to be taken out, waiting is not required, the gap time of changing one cloth cutting piece every time an operator finishes one operation piece is utilized to detect the bottom line allowance, and when the detected bottom line is partial, the operations of line clamping, wiring, winding and cutting are completed at the gap time of changing the next cloth cutting piece by the operator. The invention has the advantages of full automation, high speed, high efficiency, low cost, and suitability for commercial production, and is beneficial to market popularization.

Disclosure of Invention

The technical problem to be solved by the technology is to overcome the defects of the prior art, and provide the automatic bottom line connecting device for the flat seam type sewing equipment, which automatically completes the operations of line clamping, line connection, line winding and line cutting. The utility model also provides an automatic bottom thread receiving method of the automatic bottom thread receiving device of the flat-seam type sewing equipment.

The utility model solves the technical requirements through the following technical proposal,

an automatic bottom thread receiving device of a flat seam type sewing machine comprises a machine head 2, a platen 3, a rotating shuttle 4, a thread quantity detector 5, a motor winder 6, a bottom thread clamp 7, a bottom thread breaker 8 and a bottom thread presser 9 of the sewing machine 1, and is characterized in that,

the machine head 2 of the sewing machine 1 is fixed on the bedplate 3, and a rotating shuttle 4 is fixed on a shaft of the machine head 2 positioned below the bedplate 3;

the side of the rotating shuttle 4 is provided with a line quantity detector 5, the front of the rotating shuttle 4 is provided with a motor winder 6, and the side front of the rotating shuttle 4 is provided with a bottom line thread pressing device 9, a bottom line breaking device 8 and a bottom line clamping device 7 in sequence.

In order to obtain a better technical effect, the rotary hook 4 includes a rotary hook core 21, a hook housing 25 and a hook core 37;

The left and right corresponding inner side core walls of the rotating shuttle core 21 are respectively provided with an L-shaped shuttle shell clamping groove 22, the bottom of the inner side core wall is provided with a shuttle shell bayonet, and a shuttle shell hidden bayonet 23 is arranged at the shuttle shell bayonet; a shuttle peg 24 is also arranged at the center of the rotating shuttle peg 21;

the bobbin case 25 is a cylinder with one open end and the other closed end, the end surface of the cylinder is arc-shaped, a bobbin case opening 35 is arranged on the end surface, a round hole 31 is also arranged at the center of the end surface of the bobbin case 25, a reverse bobbin case 32 is arranged on the side wall of the bobbin case 25, a thread fixing hole 33 is arranged in front of the reverse bobbin case 32, a threading hole 34 is arranged obliquely above the thread fixing hole 33, the outlet opening of the threading hole 34 is positioned at the center of the bobbin case opening 35 of the bobbin case 25, and a probe opening 36 is arranged at the right lower part of the side wall of the bobbin case 25; a bobbin case plate machine 26 and a lock head 27 are arranged on the outer side of the closed end surface of the bobbin case 25, the lock head 27 consists of a sliding plate and a spring, one end of the spring is fixed on the bobbin case 25, one end of the sliding plate is connected with the spring, the other end of the sliding plate is clamped into a bobbin case bayonet, and the bobbin case plate machine 26 is movably connected with the sliding plate through the bottom of the sliding plate;

two clamping blocks 39 are arranged on the shell wall of the shuttle shell 25;

the bobbin case plate machine 26 for pulling up the bobbin case 25 causes the lock head 27 to retract into the bobbin case 25, the rotating bobbin 21 is put down the bobbin case plate machine 26 after the clamping block 39 on the outer case wall of the bobbin case 25 is pressed down along the L-shaped bobbin case clamping groove 22 and rotated clockwise, the lock head 27 stretches forward under the action of a spring and is clamped into the bobbin case blind bayonet 23, and the rotating bobbin 21 is fixed in the bobbin case 25;

The shuttle core 37 consists of two identical disc-shaped end surfaces and a hollow column 38, wherein two ends of the hollow column 38 respectively penetrate through the circle centers of the two end surfaces and fix the two end surfaces at the two ends;

the hollow post 38 of the shuttle core 37 is sleeved on the shuttle core post 24 and is fixed in the rotating shuttle core 21;

the rotating bobbin 21 is fixed in the bobbin case 25.

To obtain a better technical result, the bobbin stem 24 is 2-10mm long and has an outer diameter XXmm, and the hollow stem 38 of the bobbin 37 has an inner diameter 4-5mm.

To obtain a better technical result, the bobbin stem 24 is 2-3mm long.

In order to obtain better technical effects, the line quantity detector 5 comprises a first fixing frame 41, a first guide rail seat 42, a displacement sensor 43 and a line quantity probe 44;

the line volume detector 5 is fixed in the downside of platen 3 through first mount 41, the position about the first mount 41 can freely be adjusted, be fixed with first guide rail seat 42 on the first mount 41, displacement sensor 43 is installed to the one end of first guide rail seat 42, line volume probe 44 is installed on the top of displacement sensor 43, the other end of first guide rail seat 42 is connected to probe electromagnet 45.

In order to obtain better technical effects, the motor winder 6 comprises a second fixing frame 51, a second guide rail seat 52, a rail shaft 53, a spring clamp 54, a motor 55, a sliding rail 56 and a winding electromagnet 57, wherein the motor winder 6 is fixed on the lower side surface of the bedplate 3 through the second fixing frame 51, the front end of the second fixing frame 51 is provided with two second guide rail seats 52 and the sliding rail 56,

the second guide rail seat 52 is provided with a guide hole, one end of the rail shaft 53 passes through the guide hole and then is connected with the winding electromagnet 57, the forefront end of the rail shaft 53 is connected with the spring clamp 54, a motor 55 is arranged on the rail shaft 53 and between the second guide rail seat 52 and the spring clamp 54, the motor 55 is connected with the second fixing frame 51 through the sliding rail 56, and the motor 55 can slide back and forth in the second fixing frame 51 along the sliding rail 56 under the action of the winding electromagnet 57.

In order to obtain a better technical effect, the bottom thread clamp 7 comprises a slide rail seat 61, a slide rail plate 62, thread clamp scissors 63, a closing plate 64, tooth grooves 65, a motor seat 66, a servo motor 67, a gear 68 and an opening plate 69, wherein the bottom thread clamp 7 is fixed on the lower side surface of the bedplate 3 through the slide rail seat 61, the slide rail seat 61 is provided with a sliding guide hole, one end of the slide rail plate 62 penetrates through the sliding guide hole and is fixedly connected with the thread clamp scissors 63, a closing plate 64 is arranged between the thread clamp scissors 63 and the rotating shuttle 4, tooth grooves 65 are arranged on the slide rail plate 62 between the sliding guide hole and the thread clamp scissors 63, the motor seat 66 is also fixed on the slide rail seat 61, the servo motor 67 is installed on a rotating shaft of the servo motor 67, and the gear 68 is fixedly connected with the tooth grooves 65 in a meshed manner; a shearing plate 69 is fixed at one end of the sliding rail seat 61 close to the thread clamp scissors 63;

The thread-clamping scissors 63 are composed of a first upper scissors blade 71, a first lower scissors blade 72, a first thread-clamping spring plate 73, a first upper scissors handle 74 and a first lower scissors handle 75, and the first lower scissors handle 75 is fixedly connected with the first lower scissors blade 72; the first upper scissor edge 71 and the first upper scissor handle 74 are fixedly connected in an L shape;

the first upper scissor edge 71 is arranged between the first thread clamping and pressing plate 73 and the first lower scissor handle 75, wherein the first upper scissor edge 71 is arranged opposite to and movably connected with the first lower scissor handle 75, and the first thread clamping and pressing plate 73 is fixedly connected with the first lower scissor handle 75;

the first lower scissor handle 75 is fixed at the front end of the slide rail plate 62, and an opening and closing stop post 76 is arranged at the tail end of the first upper scissor handle 74.

In order to obtain better technical effect, the bottom wire breaker 8 is arranged below the bedplate 3, the bottom wire breaker 8 comprises a wire breaker base 81, a wire breaking electromagnet 82, a movable connecting rod 89 and a wire breaking clamp scissors 83,

a wire breaking electromagnet 82 is fixed on the wire breaker base 81, a movable connecting rod 89 is fixed at the front end of the wire breaking electromagnet 82,

the wire breaking and clamping scissors 83 are composed of a second upper scissors blade 84, a second lower scissors blade 85, a second wire clamping and pressing plate 86, a second upper scissors handle 87 and a second lower scissors handle 88, the tail end of the second lower scissors handle 88 is fixed on the side wall of the wire breaking base 81, and the front end of the second lower scissors handle 88 is fixedly connected with the second lower scissors blade 85; the second upper scissor handle 87 is fixedly connected with the second upper scissor blade 84 in an L shape;

The second upper scissors blade 84 is arranged between the second thread clamping spring pressing plate 86 and the second lower scissors blade 85, wherein the second upper scissors blade 84 and the second lower scissors blade 85 are oppositely arranged and movably connected, and the second thread clamping spring pressing plate 86 and the second lower scissors blade 85 are fixedly connected;

the second upper scissor handle 87 is connected with the top end of the movable connecting rod 89.

In order to obtain better technical effect, a bottom wire presser 9 is arranged in front of the bottom wire breaker 8, the bottom wire presser 9 comprises a wire presser base 91, an air splicer 92, a U-shaped wire presser bar 93, a movable shaft 94, a bracket 95, a movable bar 96, a wire presser electromagnet 97, a front wire fixing bar 98 and a rear wire fixing coil 99,

an air splicer 92 is fixed on the wire pressing device base 91, the air splicer 92 is positioned below the wire breaking clamp scissors 83, a bracket 95 is arranged on the right side of the air splicer 92, the bracket 95 comprises a bottom plate and two support arms, and the support arms and a wire pressing electromagnet 97 are fixed on the bottom plate;

the wire pressing electromagnet 97 comprises a telescopic shaft, and one end of the telescopic shaft is connected with the movable rod 96; two ends of the movable rod 96 are respectively connected with a U-shaped wire pressing rod 93, one end of the U-shaped wire pressing rod 93, which is close to the bottom wire breaker 8, is provided with four wire pressing openings, and the other end of the U-shaped wire pressing rod 93 is connected with a support arm of the bracket 95 through a movable shaft 94;

The air splicer 92 is provided with a front wire fixing rod 98 and a rear pressing groove wire fixing coil 99, and the front wire fixing rod 98 and the rear pressing groove wire fixing coil 99 are respectively arranged at two sides of the wire breaking clamp scissors 83.

The rear wire pressing and fixing groove 99 is used for fixing the bottom wire, and when the U-shaped wire pressing rod 93 is pressed down, the bottom wire can be pressed into the air splicer 92 along four wire pressing openings of the U-shaped wire pressing rod 93; when the bottom line is connected, the bottom line reaches the right bottom of the back line pressing and fixing groove 99 under the action of self elasticity during winding, so that the shearing edge of the bottom line breaker 8 can shear the bottom line.

In order to obtain better technical effects, a base wire seat 102 is arranged on the bedplate 3, and a group of wire slots 103 are arranged at the front part of the base wire seat 102; the bobbin thread is placed on the bobbin thread seat 102 in a bobbin thread form, and is introduced into the rear pressing groove fixing coil 99 after entering the lower part of the platen 3 through the thread groove 103.

In order to obtain better technical effects, the device further comprises a host control system 101, wherein the host control system 101 controls the operation of the displacement sensor 43, the wire detecting electromagnet 45, the motor 55, the winding electromagnet 57, the servo motor 67, the wire breaking electromagnet 82, the air splicer 92 and the wire pressing electromagnet 97.

In order to obtain better technical effects, an actuating switch 104 of the air splicer 92 is arranged on the side wall of the air splicer 92 and below the U-shaped wire pressing rod 93.

The invention also provides a method for automatically connecting the bottom thread of the automatic bottom thread connecting device of the flat-seam sewing equipment, which comprises the following steps,

(1) The base line cross-over travel: the bottom thread on the bottom thread seat 102 enters the lower part of the platen 3 of the sewing machine 1 along the thread groove 103, the host control system 101 is started, the thread breaking electromagnet 82 is started, the movable rod 89 is pulled back to open the knife edge of the thread breaking thread clamping scissors 83, the bottom thread passes through the front thread fixing rod 98, then passes through the rear thread pressing thread fixing groove 99, and finally the bottom thread is put into the knife edge of the thread breaking electromagnet 82; starting the host control system 101 again, enabling the broken wire electromagnet 82 to stretch forwards under the action of a spring after being powered off, acting on the second upper scissor handle 87 through the movable connecting rod 89, enabling the second upper scissor blade 71 and the second lower scissor blade 72 to start to be closed, enabling the second lower scissor blade 72 to pull the lower part of the bottom wire into the second wire clamping elastic plate 73 to be between the second lower scissor blades 72 before the bottom wire is cut, and enabling the wire head of the lower part of the bottom wire to be clamped between the second wire clamping elastic plate 73 and the second lower scissor blade 72 under the action of the elastic force of the second wire clamping elastic plate 73 when the wire clamping scissors 63 are completely closed and the bottom wire is cut; the second thread clamping elastic pressing plate 73 completes the operation of clamping the bottom thread under the pressure of the self elastic plate;

(2) Line quantity detection travel: after an operator presses the thread cutting pedal each time, the host control system 101 controls the detection electromagnet 45 to extend forwards, so that the displacement sensor 43 and the thread quantity probe 44 move forwards in the first guide rail seat 42, the thread quantity probe 44 passes through the bottom of the rotating shuttle 4 and then passes through the probe opening 36 on the shuttle shell 25 to enter the shuttle core 37, the thread quantity probe 44 cannot extend forwards any more when contacting with the bottom thread on the shuttle core 37, a spring is arranged in the displacement sensor 43, the force for detecting the extending of the electromagnet 45 is larger than the force of the spring in the displacement sensor 43, the thread quantity probe 44 retracts into the displacement sensor 43 under the action of the extending force of the detection electromagnet 45, the retraction distance of the thread quantity probe 44 is calculated through potential induction, the retraction distance of the thread quantity probe 44 is the thickness of the bottom thread on the hollow column of the shuttle core 37, and a conversion program preset in the host control system 101 displays the thickness of the bottom thread on the hollow column of the bottom thread shuttle core 37 detected by the thread quantity probe 44 as the thread quantity of the bottom thread;

when detecting that the bottom line is at a relatively small value, the host control system 101 directly controls the bottom line clamping device 7 to stretch forwards to clamp the bottom line after an operator steps on the bottom line cutting pedal next time, and clamps the bottom line before the bottom line cutting device in the machine head does not cut the bottom line yet;

When a preset full-line value is detected or a sewing machine operator finishes changing the operation machine to enter the next sewing operation, the motor 55 stops winding, then the winding electromagnet 57 stops extending forwards, the rail shaft 53 in the rail seat 52 is pulled back under the action of a spring on the electromagnet 57, and the motor 55 fixed on the rail shaft 53 is pulled back in the sliding rail 56 at the same time; simultaneously, the broken wire electromagnet 82 fixed on the wire breaker base 81 starts to break the wire, after the bottom wire is spliced, the bottom wire presser 9 pulls back the U-shaped wire pressing rod 93 under the action of the spring on the shaft of the wire pressing electromagnet 97, the bottom wire is pulled up by the rear wire pressing groove wire fixing device 99 under the action of tensile force and passes through a gap in the middle to the right top end of the wire fixing device, the electromagnet 82 is started and pulls away the scissors mouth of the broken wire clamping scissors 83 through the movable connecting rod 89, the bottom wire is pulled into the scissors mouth of the broken wire clamping scissors 83 under the action of the elasticity of the rear wire pressing groove fixing device 99 and the bottom wire, then the electromagnet 82 stops working, the wire clamping scissors 83 is pulled back to cut off the bottom wire under the action of the spring on the shaft of the electromagnet 82, and the bottom wire at the front end is pulled between the upper scissors edge 84 and the second wire clamping elastic plate 86 while the bottom wire is cut, and the bottom wire is clamped under the action of the elasticity of the second wire clamping elastic pressing plate 86;

(3) The process of taking, winding and splicing the bottom wire clamp comprises the following steps: when the thread amount detector detects that the thread amount on the bobbin 37 is too small, the servo motor 67 of the thread clamp 7 is started, the tooth slot 65 meshed with the gear 68 enables the sliding rail plate 62 to extend forward in the sliding rail seat 61 under the rotation of the gear 68, the thread clamp 63 at the front end of the sliding rail plate 62 rapidly extends to the bobbin case opening 35, when the opening and closing stop post 76 of the first upper scissor handle 74 of the thread clamp 63 passes through the closing scissor plate 64, because the closing scissor plate 64 is arc-shaped, the opening and closing stop post 76 is extruded by the closing scissor plate 64 in the extending process, the first upper scissor edge 71 and the first lower scissor edge 72 start to be closed, the first lower scissor edge 72 pulls the lower portion of the lower thread into the first thread clamp spring 73 between the first lower scissor edge 72 before the lower thread is cut, and when the thread clamp 63 is completely closed and cuts the lower thread, the thread head of the lower portion of the lower thread is clamped between the first thread clamp spring 73 and the first lower scissor edge 72 under the elastic force of the first thread clamp spring 73. When the thread clamp 63 is completely closed, the servo motor 67 starts to reversely rotate under the program preset, the front end gear 68 acts on the tooth groove 65 to enable the sliding rail plate 62 to retract in the sliding rail seat 61, and the thread clamp 63 at the front end of the sliding rail plate 62 retracts to the front end of the air splicer 92 by clamping the thread end of the shuttle 37;

When the wire clamping scissors 63 pull back the bottom wire, the bottom wire presser 91 positioned on the presser base 91 starts to work under the action of the wire pressing electromagnet 97, the wire pressing electromagnet 97 enables the U-shaped wire pressing rod 93 fixed on the bracket 95 to start to press downwards under the action of the movable shaft 94, under the action of the wire fixing of the front wire fixing rod 98 and the rear wire fixing coil 99, the four wire pressing openings on the U-shaped wire pressing rod 93 press two crossed bottom wires downwards into the splicing groove of the air splicer 92, when the U-shaped wire pressing rod 97 presses downwards to the lowest, the starting switch 104 on the air splicer 92 is pressed downwards through the connecting rod 105, and the air splicer 92 works and splices the bottom wire;

(4) Reciprocating cycle travel: during the operation of the sewing machine 1, steps (2) - (3) are repeatedly performed in preparation for the next stroke, and the bobbin thread is automatically replenished when the bobbin thread is insufficient in the rotating shuttle 4.

The invention increases the functions of automatic bottom line connection, bottom line pressing, bottom line winding and bottom line cutting under the condition of not changing the functions of the existing sewing machine, and when a worker needs to replace cloth cut pieces or complete specific clothing making actions after finishing automatic bottom line cutting in a clothing making stroke, the technology automatically controls all electromagnets, motors and electromagnetic valves under a machine platform by a system host machine to complete the strokes of automatic wiring, automatic line pressing, automatic winding and automatic line breaking in a very short time. When the bobbin base thread is not fully wound, the sewing work can be started only when an operator presses the sewing pedal, because the control host of the sewing machine system can synchronously control the motor to stop winding in a very short time, and the sewing is directly performed after the base thread is rapidly cut off, the operator is not required to stop waiting, the full automation is as follows! Overcomes the defects of low efficiency and high cost of manual bottom line replacement, is suitable for the requirements of making a great part of clothes and provides a basis for the full-automatic production of the clothes in the future.

Drawings

FIG. 1 is a schematic view of a sewing machine according to an embodiment of the present invention;

FIG. 2 is a schematic view of a bottom view of a platen according to an embodiment of the present invention;

FIG. 3 is a diagram showing the effect of the bobbin thread clamp, the bobbin thread clamp and the bobbin thread breaker before the rotating shuttle according to the embodiment of the present invention;

FIG. 4 is a diagram showing the effect of the motor winder before the rotating shuttle according to the embodiment of the invention;

FIG. 5 is a schematic view of a rotating shuttle according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a bobbin case according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a bobbin structure according to an embodiment of the present invention;

FIG. 8 is a front view of a rotating shuttle peg according to an embodiment of the present invention;

FIG. 9 is a right perspective view of a rotating shuttle peg according to an embodiment of the present invention;

FIG. 10 is a schematic illustration of a bobbin installation according to an embodiment of the present invention;

FIG. 11 is a schematic illustration of a bobbin case installation according to an embodiment of the present invention;

FIG. 12 is a schematic diagram illustrating operation of a motor winder according to an embodiment of the present invention;

FIG. 13 is a schematic diagram of a motor winder according to an embodiment of the present invention;

FIG. 14 is a schematic diagram of a bottom line gripper waiting for operation according to an embodiment of the present invention;

FIG. 15 is a schematic diagram of the operation of the bottom wire clamp according to the embodiment of the present invention;

FIG. 16 is a schematic view of a wire clip shear in accordance with an embodiment of the present invention;

FIG. 17 is a schematic view of a wire gripping scissors according to an embodiment of the present invention;

FIG. 18 is a schematic view of a bottom line breaker according to an embodiment of the present invention;

FIG. 19 is a schematic diagram of a line detector according to an embodiment of the present invention;

FIG. 20 is a schematic view of a base thread presser and an air splicer according to an embodiment of the present invention;

FIG. 21 is a schematic diagram illustrating the operation of a base thread presser and an air splicer according to an embodiment of the present invention;

fig. 22 is a schematic diagram of a post-slot die coil structure according to an embodiment of the invention.

Wherein 1-sewing machine, 2-head, 3-platen, 4-rotating shuttle, 5-thread quantity detector, 6-motor winder, 7-bobbin thread clamp, 8-bobbin thread breaker, 9-bobbin thread presser, 101-host control system, 102-bobbin thread seat, 103-thread groove, 104-start switch, 21-rotating shuttle bobbin, 22-L bobbin case neck, 23-bobbin case blind opening, 24-bobbin stem, 25-bobbin case, 26-bobbin case trigger, 27-lock, 31-round hole, 32-inverted bobbin case, 33-thread fixing hole, 34-threading hole, 35-bobbin case opening, 36-probe opening, 37-bobbin core, 38-hollow column, 39-fixture block, 41-fixing frame, 42-guide seat, 43-displacement sensor, 44-line quantity probe, 45-line detecting electromagnet, 51-second fixing frame, 52-second guide rail seat, 53-rail shaft, 54-spring clip, 55-motor, 56-slide rail, 57-winding electromagnet, 61-slide rail seat, 62-slide rail plate, 63-line clamping cutter, 64-closing cutter plate, 65-tooth socket, 66-motor seat, 67-servo motor, 68-gear, 69-opening cutter plate, 71-first upper cutter blade, 72-first lower cutter blade, 73-first line clamping spring plate, 74-first upper cutter handle, 75-first lower cutter handle, 76-opening and closing baffle column, 81-line breaker base, 82-line breaking electromagnet, 83-line breaking clamp cutter, 84-second upper shearing edge, 85-second lower shearing edge, 86-second wire clamping spring pressing plate, 87-second upper shearing handle, 88-second lower shearing handle, 89-movable connecting rod, 91-wire pressing device base, 92-air splicer, 93-U-shaped wire pressing rod, 94-movable shaft, 95-bracket, 96-movable rod, 97-wire pressing electromagnet, 98-front wire fixing rod and 99-rear wire pressing groove coil fixing.

Detailed Description

In the description of the present invention, it should be understood that the terms "front," "rear," "upper," "lower," "front," "rear," "left," "right," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the invention and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the invention. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. It will be understood by those skilled in the art that the foregoing terms are of specific significance in this application, and thus, although the invention has been described in some detail by way of example only, it is not limited to the above embodiments, but may include many other equivalent embodiments without departing from the spirit of the invention, the scope of which is defined by the scope of the appended claims.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.

Example 1

Example 2

In comparison with the conventional general rotary hook 4, bobbin case 25 and bobbin 37, in order to allow the probe 44 of the thread quantity detector 5, the spring clip 54 of the motor winder 6, and the thread-gripping scissors 64 of the under thread gripper 7 to perform the work of detecting, winding, and gripping the thread, improvement is required for the rotary hook 4, bobbin case 25 and bobbin 37.

An automatic bottom thread receiving device of a flat seam type sewing machine comprises a machine head 2 of a sewing machine 1, a bedplate 3, a rotating shuttle 4, a thread quantity detector 5, a motor winder 6, a bottom thread clamp 7, a bottom thread breaker 8 and a bottom thread presser 9,

a base wire seat 102 is arranged on the bedplate 3, and a group of wire slots 103 are arranged at the front part of the base wire seat 102; the bottom wire is placed on the bottom wire seat 102 in a cylindrical wire form, and is introduced into the rear pressing groove fixing coil 99 after entering the lower part of the bedplate 3 through the wire groove 103;

the rotating shuttle 4 includes a rotating bobbin 21, a bobbin case 25, and a bobbin 37;

the left and right corresponding inner side core walls of the rotating shuttle core 21 are respectively provided with an L-shaped shuttle shell clamping groove 22, the bottom of the inner side core wall is provided with a shuttle shell bayonet, and a shuttle shell hidden bayonet 23 is arranged at the shuttle shell bayonet; a shuttle peg 24 is also arranged at the center of the rotating shuttle peg 21; the length of the shuttle stem 24 is 2-10mm;

When the trigger is pulled up, the contact part between the bottom of the trigger and the inside of the slide plate is retracted, so that the slide plate is retracted, and the lock head is retracted; when the rotating bobbin 21 is put into the bobbin case 25, the bobbin case plate machine 26 is put down, the sliding plate stretches forwards under the action of the spring, and the lock head 27 is clamped into the bobbin case blind bayonet 23;

two clamping blocks 39 are arranged on the shell wall of the shuttle shell 25;

the bobbin case plate machine 26 for pulling up the bobbin case 25 causes the lock head 27 to retract into the bobbin case 25, and after the fixture block 39 on the outer case wall of the bobbin case 25 is pressed down along the L-shaped bobbin case clamping groove 22 and rotated clockwise in the rotating bobbin core 21, the bobbin case 25 is fixed in the bobbin case 25;

in order to fix the bobbin case 25, in this embodiment, two clamping blocks 39 are designed on the case wall of the bobbin case 25, two L-shaped bobbin case clamping grooves 22 are designed on the left and right core walls of the rotating bobbin 21, and a bobbin case blind bayonet 23 is designed below the bobbin case bayonet of the rotating bobbin 21. When the bobbin case trigger 26 of the bobbin case 25 is pulled up to retract the lock head 27 into the bobbin case 25, the lock head 27 is rotated clockwise after being pushed down along the L-shaped bobbin case catching groove 22 by the clamping block 39 on the case wall, and then the bobbin case trigger 26 is released to rotate the lock head 27 into the bobbin case blind bayonet 23 through the bobbin case bayonet, the L-shaped bobbin case catching groove 22 can prevent the bobbin case 25 from moving up and down, and the bobbin case blind bayonet 23 can prevent the bobbin case 25 from moving left and right, so that the bobbin case 25 is fixed in the rotary hook 4.

The shuttle core 37 consists of two identical disc-shaped end surfaces and a hollow column 38, wherein two ends of the hollow column 38 respectively penetrate through the circle centers of the two end surfaces and fix the two end surfaces at the two ends; the inner diameter of the hollow post 38 is 4-5mm, and as an optimization, the shuttle stem 24 is 2-3mm long;

the rotating bobbin 21 is fixed in the bobbin case 25;

a line detector 5 is arranged at the side of the rotating shuttle 4,

the line detector 5 comprises a first fixing frame 41, a first guide rail seat 42, a displacement sensor 43 and a line probe 44;

The first guide rail bases 42 are used to enable the linear probe 44 to slide back and forth in the first guide rail bases 42, the linear probe 44 extends forward under the action of the line detecting electromagnet 45, and in order to enable the positions of the linear probe 44 which can extend forward to be consistent without deviation, two first guide rail bases 42 are selected in the embodiment, so that the situation that after one first guide rail base 42 is used for a long time, the probe position may deviate in the extending process is avoided.

The front of the rotating shuttle 4 is provided with a motor winder 6, the motor winder 6 comprises a second fixing frame 51, a second guide rail seat 52, a rail shaft 53, a spring clamp 54, a motor 55, a sliding rail 56 and a winding electromagnet 57, the motor winder 6 is fixed on the lower side surface of the bedplate 3 through the second fixing frame 51, the front end of the second fixing frame 51 is provided with two second guide rail seats 52 and sliding rails 56,

the second guide rail seat 52 is provided with a guide hole, one end of the rail shaft 53 passes through the guide hole and then is connected with a winding electromagnet 57, the forefront end of the rail shaft 53 is connected with a spring clamp 54, a motor 55 is arranged on the rail shaft 53 and positioned between the second guide rail seat 52 and the spring clamp 54, the motor 55 is connected with the second fixing frame 51 through the sliding rail 56, and the motor 55 can slide back and forth in the second fixing frame 51 along the sliding rail 56 under the action of the winding electromagnet 57;

a bottom thread pressing device 9, a bottom thread breaking device 8 and a bottom thread clamping device 7 are sequentially arranged in front of the side of the rotating shuttle 4;

the bottom line clamp 7 comprises a slide rail seat 61, a slide rail plate 62, a line clamp 63, a closing plate 64, a tooth slot 65, a motor seat 66, a servo motor 67, a gear 68 and an opening plate 69, wherein the bottom line clamp 7 is fixed on the lower side surface of the bedplate 3 through the slide rail seat 61, the slide rail seat 61 is provided with a sliding guide hole, one end of the slide rail plate 62 penetrates through the sliding guide hole and then is fixedly connected with the line clamp 63, the tooth slot 65 is arranged on the slide rail plate 62 between the sliding guide hole and the line clamp 63, the motor seat 66 is also fixed on the slide rail seat 61, the servo motor 67 is installed on the motor seat 66, the gear 68 is fixed on a rotating shaft of the servo motor 67, and the gear 68 is meshed and connected with the tooth slot 65; a shearing plate 69 is fixed at one end of the sliding rail seat 61 close to the thread clamp scissors 63;

The action and principle of the shearing plate 69 and the shearing plate 64 are the same, namely an iron plate with a certain angle is shown in fig. 16 and 17, and the position of the baffle plate is changed through the change of a fixed screw in a screw hole, so that the degree of opening and closing of the scissors is adjusted;

the first lower scissor handle 75 is fixed at the front end of the sliding rail plate 62, and the tail end of the first upper scissor handle 74 is provided with an opening and closing baffle column 76;

the bottom wire breaker 8 is arranged below the bedplate 3, the bottom wire breaker 8 comprises a wire breaker base 81, a wire breaking electromagnet 82, a movable connecting rod 89 and a wire breaking clamping scissors 83,

the second upper scissor handle 87 is connected with the top end of the movable connecting rod 89;

a bottom wire pressing device 9 is arranged in front of the bottom wire breaker 8, the bottom wire pressing device 9 comprises a wire pressing device base 91, an air splicer 92, a U-shaped wire pressing rod 93, a movable shaft 94, a bracket 95, a movable rod 96, a wire pressing electromagnet 97, a front wire fixing rod 98 and a rear wire pressing groove fixing coil 99,

In order to obtain better technical effects, the device also comprises a host control system 101, wherein the host control system 101 controls the operation of the displacement sensor 43, the wire detecting electromagnet 45, the motor 55, the winding electromagnet 57, the servo motor 67, the wire breaking electromagnet 82, the air splicer 92 and the wire pressing electromagnet 97;

A starting switch 104 of the air splicer 92 is arranged on the side wall of the air splicer 92 and below the U-shaped wire pressing rod 93;

four wire pressing openings on the U-shaped wire pressing rod 93 press two crossed bottom wires down into the splicing groove of the air splicer 92, when the U-shaped wire pressing rod 93 presses the bottom wires to the lowest, the U-shaped wire pressing rod 93 simultaneously presses a starting switch 104 of the air splicer 92 down when pressing down, the starting switch 104 controls the starting of the air splicer 92, and then the air splicer 92 works and splices the bottom wires.

Example 3

An automatic bottom thread receiving method of an automatic bottom thread receiving device of a flat seam type sewing machine, which comprises the steps of,

The existing flat sewing machine is mainly a computer flat sewing machine, the power of the computer flat sewing machine is generally a servo motor, the servo motor has the advantages that a needle and a rotating shuttle can be stopped at a fixed position after a thread cutting pedal is stepped on, so that an automatic thread cutting device can cut out upper threads and bottom threads with proper lengths, and the needle can be stopped at the highest point, so that an operator can take out a sewing workpiece after lifting a presser foot, the rotating shuttle 4 can be stopped at a fixed position after the computer flat sewing machine finishes sewing an operating piece, the stop position of the rotating shuttle 4 is the stop position after the thread cutting pedal is stepped on as shown in the attached drawing 1 of the specification, a space gap is formed at the right lower part of the rotating shuttle 4, and a probe opening 36 is formed below the shuttle shell 25 in order to enable a thread detector 5 to enter the shuttle shell to detect the quantity of threads, and the probe opening 36 is formed in the lower part of the shuttle shell as shown in the attached drawing 3 of the specification. The conventional general bobbin case 25 is fixed in the rotary hook 4 by the bobbin case trigger being caught on the bayonet of the rotary hook stem 24 of the rotary hook 4 to prevent up and down movement, and by the locking head on the bobbin case trigger being caught on the bayonet of the rotary hook 21 to prevent left and right movement, so that the bobbin case 25 is fixed to the rotary hook 4 without moving. In order to allow the spring clip 54 of the motor winder 6 to extend into the bobbin 37 for winding under the action of the winding electromagnet 57, the length of the rotating shuttle stem 24 is cut to be only about several millimeters long, and a circular hole 31 is formed in the center of the bobbin case 25, so that the spring clip 54 can enter the bobbin 37 through the circular hole 31 and be elastically clamped in the stem tube in the center of the bobbin 37 by the spring of the spring clip 54, as shown in fig. 4 of the specification. After cutting the length of the rotary hook stem 24, the hook 25 cannot be fixed in the rotary hook 4, and in order to fix the hook 25, two clamping blocks 39 are designed on the shell wall of the hook 25, two L-shaped hook clamping grooves 22 are designed on the left and right core walls of the rotary hook 21, and a hook hidden bayonet 23 is designed below the hook bayonet of the rotary hook 21. When the bobbin case trigger for pulling up the bobbin case 25 retracts the lock head into the bobbin case, then the lock head is pressed down along the L-shaped bobbin case clamping groove 22 by the clamping block 39 on the case wall and then rotated clockwise, then the bobbin case trigger is released to rotate the lock head into the bobbin case blind bayonet 23 by the bobbin case bayonet, the L-shaped bobbin case clamping groove 22 can prevent the bobbin case 25 from moving up and down, and the bobbin case blind bayonet 23 can prevent the bobbin case 25 from moving left and right, so that the bobbin case 25 is fixed in the rotary hook 4, the rotary hook core column 24 which is cut to be about one centimeter long and the hollow column 38 which is four to five millimeters at the center of one end face of the bobbin core 37 play a role of fixing the bobbin core 37, and the bobbin core 37 can smoothly run during high-speed rotation. In order to allow the thread clamp 63 of the thread clamp 7 to clamp and cut the bobbin thread in position, as shown in fig. 2 of the specification, the invention designs a thread fixing hole 33 in front of the inverted bobbin case 32 of the bobbin case 25, the thread fixing hole 33 prevents the bobbin thread from sliding out of the inverted bobbin case 32 when sliding, a threading hole 34 is designed in the middle and upper position of the thread fixing hole 33, the outlet of the threading hole 34 is positioned at the center line position of the bobbin case 35 of the bobbin case 25, because the bobbin thread must pass through the needle eye when being pulled into the fabric of the operation member by the upper thread, and the bobbin thread must pass through the outlet of the threading hole 33 and be positioned under the needle eye, so that the thread clamp 63 can cut and clamp the bobbin thread when being advanced into the bobbin case 35 under the action of the servo motor 67, the sewing machine operator works without continuous and without stopping the sewing machine, after stepping on the thread cutting pedal when finishing a work member, the other workpiece to be sewn is replaced, and the thread quantity detector 5 detects the quantity of the residual thread in the bobbin 37 every time the thread cutting pedal is pressed, after the thread cutting pedal is pressed to start the sewing machine thread cutting device to cut the upper thread, as shown in fig. 8 of the specification, the host control system 101 controls the thread quantity detector 5 to work, the thread detecting electromagnet 45 works and pushes the displacement sensor 43 forward, the displacement sensor 43 is positioned on the two first guide rail seats 42 of the fixing frame 41, the thread quantity probe 44 on the displacement sensor 43 enters the bobbin 37 through the probe opening 36 below the bobbin case 25 when pushed forward, the displacement distance of the thread quantity probe 44 is calculated through the displacement sensor 43 under the extrusion of the residual thread quantity of the bobbin 37, so that the host control system 101 knows the quantity of the residual thread quantity of the bobbin 37 through an electric signal and displays the information on the display screen of the machine head 2, when the amount of thread on the bobbin 37 is detected to be below a certain preset value. When the operator of the sewing machine steps on the thread cutting pedal again to sew the next operation piece, the thread clamping device 7 is started at the same time when the thread cutting device of the sewing machine starts, as shown in fig. 6 of the accompanying drawings, the thread clamping device 7 is fixed under the platen 3 by the slide rail seat 61, the servo motor 67 starts, the slide rail plate 62 stretches forward in the slide rail seat 61 through the front end gear 68 acting on the tooth groove 65, the thread clamping scissors 63 at the front end of the slide rail plate 62 rapidly stretches to the bobbin case opening 35, as shown in fig. 7 of the accompanying drawings, when the opening and closing baffle column 76 of the first upper scissors handle 74 passes through the closing scissors plate 64, because the closing scissors plate 64 is in arc shape, the opening and closing baffle column 76 is extruded by the closing scissors plate 64 in the process of the advancing, the upper scissors edge 71 and the lower scissors edge 72 start to be closed, the lower scissors edge 72 pulls the lower part of the bottom thread between the first thread clamping elastic pressing plate 73 before the bottom thread is cut, and when the thread clamping scissors 63 is completely closed and the bottom thread is cut, the thread clamp head of the lower part is pressed between the first scissors elastic pressing plate 73 and the lower scissors elastic pressing plate 73. When the thread clamp 63 is completely closed, the servo motor 67 starts to reversely rotate under the preset program, the front end gear 68 acts on the tooth groove 65 to retract the sliding rail plate 62 in the sliding rail seat 61, and the thread clamp 63 at the front end of the sliding rail plate 62 retracts to the front end of the air splicer 92 by clamping the thread end of the shuttle 37. As shown in fig. 9 of the specification, when the wire scissors 63 pull back the bottom wire, the bottom wire presser 9 on the presser base 91 starts to work under the action of the presser electromagnet 97, the presser electromagnet 97 starts to press down the U-shaped presser bar 93 fixed on the bracket 95 under the action of the movable shaft 94, under the action of the front wire fixing bar 98 and the rear wire fixing coil 99, the four wire openings on the U-shaped presser bar 93 press down two crossed bottom wires into the splicing groove of the air splicer 92, and when the U-shaped presser bar 97 presses down to the lowest, the air splicer 92 works and splices the bottom wire through the start switch 104 on the air splicer 92 under the pressure of the connecting rod 105. At the same time as the bobbin thread clamp 7 and the bobbin thread presser 9 are operated, the motor winder 6 is started to operate, as shown in fig. 5 of the specification, the winding electromagnet 57 is started and pushed forward, the motor winder 6 is fixed under the platen 3 by the fixing frame 51, the rail shaft 53 in the rail seat 52 is deduced by the winding electromagnet 57 forward, the motor 55 fixed on the rail shaft 53 is pushed forward in the sliding rail 56 at the same time, the spring clip 54 at the forefront end of the rail shaft is pushed into the round hole 31 in the center of the shuttle 37, and the column tube in the center of the shuttle 37 is blocked by the spring of the spring clip 54. When the air splicer 92 splices the bobbin thread, the motor 55 starts and starts winding, the bobbin thread on the bobbin thread seat 102 is wound into the bobbin 37 through the thread groove 103, the thread amount detector 5 detects the thread amount in the bobbin 37 every several seconds while the motor 55 is wound, when a preset full thread amount is detected, or when the sewing machine operator finishes replacing the operator to enter the next sewing operation, the motor 55 stops winding, then the winding electromagnet 57 stops extending forwards, the rail shaft 53 in the rail seat 52 is pulled back under the action of the spring on the electromagnet 57 shaft, and the motor 55 fixed on the rail shaft 53 is pulled back in the sliding rail 56 at the same time. Simultaneously, the wire breaking electromagnet 82 fixed on the wire breaker base 81 starts to break wires, as shown in the attached drawing 9 of the specification, after the bottom wires are spliced, the bottom wire presser 9 pulls back the U-shaped wire pressing rod 93 under the action of the spring on the shaft of the wire pressing electromagnet 97, the bottom wires are pulled up by the rear wire pressing groove wire fixer 99 under the action of tensile force and pass through a gap in the middle to the right top end of the wire fixer, the electromagnet 82 is started and pulls up the scissors mouth of the wire breaking wire clamping scissors 83 through the movable connecting rod 89, the bottom wires are pulled into the scissors mouth of the wire breaking wire clamping scissors 83 under the elastic action of the rear wire pressing groove wire fixer 99 and the bottom wires, then the electromagnet 82 stops working, the wire clamping scissors 83 are pulled back under the action of the spring on the shaft of the electromagnet 82 to cut the bottom wires, the front bottom wires are pulled between the upper scissors edge 84 and the second wire clamping pressing plate 86 while the bottom wires are cut, finally the servo motor 67 continues to rotate reversely under the action of the elastic force of the second wire clamping plate 86, the preset servo motor 68 acts on the program, the front end gear 68 acts on the tooth socket plate 62 to enable the scissors mouth to be clamped by the sliding rail seat 62, and the front end toothed plate 62 is retracted to be clamped by the scissors mouth of the scissors mouth, and the front end 63 is retracted by the arc-shaped wire clamping scissors mouth is retracted by the scissors mouth of the scissors mouth, and the front end is retracted by the front end of the scissors back is retracted by the front end of the cutter 63, and the front end toothed plate is retracted by the front end of the cutter spring, and the front end of the cutter is held by the cutter, and the front end of the cutter is held.

The fixed position in this embodiment means that the rotating shuttle gap will stop at a relatively fixed angle, and the gap means that the rotating shuttle has no half-edge gap of the shuttle wall. The rotating shuttle rotates when running, before the servo motor does not reduce price, the stepping motor needs a very complex system to stop at a fixed position, and stopping at a fixed position has two benefits, namely, the needle punctures up and down on the cloth when sewing, if the stopping position is random, the needle is mostly just stopped in the cloth, and a bit on the cloth, at the moment, you can not take out the sewn cloth, a person needs to hand a hand to shake the machine head to rotate the needle to stop the needle at the highest position, and the second is that the length of the cutting line cannot be determined, and if the upper line is too short, the needle flies out when sewing next time.

With the popularization of the servo motor, the machine head can stop at a fixed position when stopping the needle, namely the needle is positioned at the highest position, the positions of the rotating shuttle and the needle are identical-! So that the space gap can be stopped at a fixed position after the rotating shuttle is stopped in a rotating way.

The rotary shuttle consists of a main body and a rotary shuttle core, the rotary shuttle core can rotate in the rotary shuttle, the shuttle shell can not rotate, and the rotary shuttle is required to rotate, so that in order to prevent the rotary shuttle core from rotating, the top of the rotary shuttle core is provided with a bayonet, here a positioning hook, a bottom hook is fixed on a machine table, and the bottom hook cannot move, so that the bottom hook clamps the rotary shuttle core to ensure that the position of the rotary shuttle core is not moved relative to the machine table when the rotary shuttle rotates at a high speed.

The bobbin case has a bobbin case on the side wall, the bobbin case is on the side wall because the bobbin is flat and can only be taken out from the side surface, so the bobbin case is on the side wall, the bobbin case is put into the rotating bobbin case, and the bobbin case is provided with a plurality of bottom threads, and the number of the bottom threads are required to be replaced is smaller as the number of the bottom threads is larger, so the rotating bobbin case is not a complete cylinder, but a larger gap is formed at the bottom of the rotating bobbin case.

The positions of the rotating shuttle core and the shuttle shell are fixed by the positioning hooks without great change, and the line quantity detector is also fixed, so that the quantity of the bottom line in the shuttle core can be detected from the notch.

However, the position of the rotating shuttle is not fixed, the rotating shuttle is not rotated only when the rotating shuttle is stopped, one side of the rotating shuttle is free of space, the other side of the rotating shuttle is provided with a rotating shuttle wall, the wall is not movable and cannot be modified, the size and the position of the rotating shuttle cannot be easily changed after the design of the rotating shuttle is developed for hundreds of years, and the probe cannot enter the shuttle shell if the position of the rotating shuttle cannot be stopped at a fixed position; and the second is that the rotating shuttle needs to rotate to adjust the position, and the range is not large.

The probe mouth is selected through multiple observation, and although the shuttle shell and the rotating shuttle core can be opened at any position, the upper half part is provided with a thread cutting device which is not movable, the position of the shuttle skin is also not movable, only the lower right corner can be opened, the rotating shuttle can only be opened at the notch part without the rotating shuttle wall, and the notch is positioned at the lower right corner when the needle is stopped.

The invention controls all electromagnetic valves, motors and sensors by a host control system, so that a working stroke can be completed in a very short time, even if an operator wants to start sewing operation at any time when winding, he only needs to press a starting pedal, in the time period that the sewing machine rotates to hook the first needle bottom thread and does not hook the second needle yet, the host system firstly stops the winding motor and then retracts the winding motor through the winding electromagnet, the winding motor is retracted and simultaneously starts the thread breaking electromagnet to cut the bottom thread, so that the bottom thread does not wind the whole bobbin case, the operator wants to start sewing at any time, the winding process does not need to stop at all, and the quantity and the time interval of the required winding quantity of the bobbin core can be set through the host. Therefore, no matter how long the sewing machine operator changes one sewing piece, the host control system can finish the automatic wiring, automatic line pressing, automatic winding and automatic line breaking processes of the base line when the operator steps on the next piece to be sewn through program setting, if the time for changing some special operating pieces is very short, a manual line changing key on a display screen can be pressed down to wait for a while, and the invention keeps the conventional manual line winding device on the sewing machine table, so that the base line can be directly and manually changed. The invention is not limited to single lockstitch sewing machines, but is applicable to sewing equipment of all lockstitch sewing principles, including combination type multi-body machines, and special machines modified by lockstitch sewing machine principles, such as embroidery machines, double needle lockstitch sewing machines, high-foot lockstitch sewing machines, etc. The air splicer and the thread-clamping scissors are all common sewing machine equipment, and the electromagnetic valve and the electromagnet are more common industrial equipment, so the equipment is very stable and durable.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An automatic bottom thread receiving device of a flat seam type sewing machine comprises a machine head (2) of the sewing machine (1), a bedplate (3), a rotating shuttle (4), a thread quantity detector (5), a motor winder (6), a bottom thread clamp (7), a bottom thread breaker (8) and a bottom thread presser (9), and is characterized in that,

The machine head (2) of the sewing machine (1) is fixed on the bedplate (3), and a rotating shuttle (4) is fixed on a shaft of the machine head (2) positioned below the bedplate (3);

the automatic yarn feeding device is characterized in that a yarn quantity detector (5) is arranged on the side of the rotating shuttle (4), a motor winder (6) is arranged in front of the rotating shuttle (4), and a bottom yarn presser (9), a bottom yarn breaker (8) and a bottom yarn clamping device (7) are sequentially arranged on the side front of the rotating shuttle (4).

2. The automatic bottom thread take-up device for flat seam sewing apparatus as claimed in claim 1, wherein the rotating shuttle (4) comprises a rotating shuttle core (21), a bobbin case (25) and a shuttle core (37);

the left and right corresponding inner side core walls of the rotating shuttle core (21) are respectively provided with an L-shaped shuttle shell clamping groove (22), the bottom of the inner side core wall is provided with a shuttle shell bayonet, and a shuttle shell hidden bayonet (23) is arranged at the shuttle shell bayonet; a shuttle stem (24) is also arranged at the center of the rotating shuttle core (21);

the bobbin case (25) is a cylinder with one open end and the other closed end, the end face of the bobbin case is arc-shaped, a bobbin case opening (35) is formed in the end face of the bobbin case, a round hole (31) is formed in the center of the end face of the bobbin case (25), a reverse and forward bobbin case (32) is arranged on the side wall of the bobbin case (25), a thread fixing hole (33) is formed in the front of the reverse and forward bobbin case (32), a threading hole (34) is formed in the obliquely upper side of the thread fixing hole (33), a wire outlet of the threading hole (34) is located in the center of the bobbin case opening (35) of the bobbin case (25), and a probe opening (36) is formed in the right lower side of the side wall of the bobbin case (25); a bobbin case plate machine (26) and a lock head (27) are arranged on the outer side of the closed end surface of the bobbin case (25), the lock head (27) consists of a sliding plate and a spring, one end of the spring is fixed on the bobbin case (25), one end of the sliding plate is connected with the spring, the other end of the sliding plate is clamped into a bobbin case bayonet, and the bobbin case plate machine (26) is movably connected with the sliding plate through the bottom of the sliding plate;

Two clamping blocks (39) are arranged on the shell wall of the shuttle shell (25);

the bobbin case plate machine (26) for pulling up the bobbin case (25) causes the lock head (27) to retract into the bobbin case (25), the rotating bobbin core (21) is fixed in the bobbin case (25) by pushing down a clamping block (39) on the wall of the bobbin case (25) along an L-shaped bobbin case clamping groove (22) and rotating clockwise, then placing the bobbin case plate machine (26), and the lock head (27) extends forwards under the action of a spring and is clamped into a bobbin case hidden bayonet (23);

the shuttle core (37) consists of two identical disc-shaped end faces and a hollow column (38), wherein two ends of the hollow column (38) respectively penetrate through the circle centers of the two end faces and fix the two end faces at the two ends of the hollow column;

the hollow column (38) of the shuttle core (37) is sleeved on the shuttle core column (24) and is fixed in the rotating shuttle core (21);

the rotating bobbin (21) is fixed in the bobbin case (25).

3. The automatic bobbin thread receiving device for flat seam sewing apparatus as claimed in claim 2, wherein said bobbin stem (24) is 2-10mm long and said hollow stem (38) of said bobbin (37) has an inner diameter of 4-6mm.

4. The automatic bottom line connecting device of flat seam sewing equipment according to claim 1 or 2, characterized in that the line quantity detector (5) comprises a first fixing frame (41), a first guide rail seat (42), a displacement sensor (43) and a line quantity probe (44);

The wire quantity detector (5) is fixed on the lower side face of the bedplate (3) through the first fixing frame (41), the position of the first fixing frame (41) about can freely be adjusted, be fixed with first guide rail seat (42) on the first fixing frame (41), displacement sensor (43) are installed to one end of first guide rail seat (42), wire quantity probe (44) are installed on the top of displacement sensor (43), wire detection electromagnet (45) are connected to the other end of first guide rail seat (42).

5. The automatic bottom line connecting device of the flat seam type sewing equipment according to claim 1 or 2, wherein the motor winder (6) comprises a second fixing frame (51), a second guide rail seat (52), a rail shaft (53), a spring clamp (54), a motor (55), a sliding rail (56) and a winding electromagnet (57), the motor winder (6) is fixed on the lower side surface of the bedplate (3) through the second fixing frame (51), the front end of the second fixing frame (51) is provided with two second guide rail seats (52) and sliding rails (56),

the guide hole is formed in the second guide rail seat (52), one end of the rail shaft (53) penetrates through the guide hole and then is connected with the winding electromagnet (57), the forefront end of the rail shaft (53) is connected with the spring clamp (54), a motor (55) is arranged on the rail shaft (53) and between the second guide rail seat (52) and the spring clamp (54), the motor (55) is connected with the second fixing frame (51) through the sliding rail (56), and the motor (55) can slide back and forth in the second fixing frame (51) along the sliding rail (56) under the action of the winding electromagnet (57).

6. The automatic bottom thread receiving device of the flush joint type sewing equipment according to claim 1 or 2, wherein the bottom thread clamp (7) comprises a slide rail seat (61), a slide rail plate (62), thread clamp scissors (63), a closing scissors plate (64), a tooth socket (65), a motor seat (66), a servo motor (67), a gear (68) and an opening scissors plate (69), the bottom thread clamp (7) is fixed on the lower side surface of the platen (3) through the slide rail seat (61), the slide rail seat (61) is provided with a sliding guide hole, one end of the slide rail plate (62) penetrates through the sliding guide hole and then is fixedly connected with the thread clamp scissors (63), a closing scissors plate (64) is arranged between the thread clamp scissors (63) and the rotating shuttle (4), the slide rail plate (62) between the sliding guide hole and the thread clamp scissors (63) is provided with the tooth socket (65), the slide rail seat (61) is also fixedly provided with the seat (66), the servo motor seat (67) is arranged on the motor seat (66), one end of the servo motor seat (67) is fixedly provided with the gear (68), and the tooth socket (68) is meshed with the rotating shaft (65). A shearing plate (69) is fixed at one end of the sliding rail seat (61) close to the thread clamp scissors (63);

the thread clamp (63) is composed of a first upper shear blade (71), a first lower shear blade (72), a first thread clamp spring plate (73), a first upper shear handle (74) and a first lower shear handle (75), and the first lower shear handle (75) is fixedly connected with the first lower shear blade (72); the first upper scissor blade (71) and the first upper scissor handle (74) are fixedly connected in an L shape;

The first upper shear blade (71) is arranged between the first wire clamping and pressing plate (73) and the first lower shear handle (75), wherein the first upper shear blade (71) is arranged opposite to and movably connected with the first lower shear handle (75), and the first wire clamping and pressing plate (73) is fixedly connected with the first lower shear handle (75);

the first lower scissor handle (75) is fixed at the front end of the sliding rail plate (62), and the tail end of the first upper scissor handle (74) is provided with an opening and closing baffle column (76).

7. The automatic bottom thread receiving device of the flat seam sewing equipment according to claim 1 or 2, wherein the bottom thread cutter (8) is arranged below the platen (3), the bottom thread cutter (8) comprises a thread cutter base (81), a thread cutter electromagnet (82), a movable connecting rod (89) and a thread cutter clip (83),

a wire breaking electromagnet (82) is fixed on the wire breaker base (81), a movable connecting rod (89) is fixedly arranged at the front end of the wire breaking electromagnet (82),

the broken wire clamp wire scissors (83) are composed of a second upper scissors blade (84), a second lower scissors blade (85), a second wire clamp spring pressing plate (86), a second upper scissors handle (87) and a second lower scissors handle (88), the tail end of the second lower scissors handle (88) is fixed on the side wall of a wire breaker base (81), and the front end of the second lower scissors handle (88) is fixedly connected with the second lower scissors blade (85); the second upper scissor handle (87) is fixedly connected with the second upper scissor blade (84) in an L shape;

The second upper shear blade (84) is arranged between the second wire clamping elastic pressing plate (86) and the second lower shear blade (85), wherein the second upper shear blade (84) and the second lower shear blade (85) are oppositely arranged and movably connected, and the second wire clamping elastic pressing plate (86) is fixedly connected with the second lower shear blade (85);

the second upper scissor handle (87) is connected with the top end of the movable connecting rod (89).

8. The automatic bottom thread connecting device of flat seam sewing equipment according to claim 7, characterized in that a bottom thread pressing device (9) is arranged in front of the bottom thread breaking device (8), the bottom thread pressing device (9) comprises a thread pressing device base (91), an air splicer (92), a U-shaped thread pressing rod (93), a movable shaft (94), a bracket (95), a movable rod (96), a thread pressing electromagnet (97), a front thread fixing rod (98) and a rear thread pressing fixing coil (99),

an air splicer (92) is fixed on a wire pressing device base (91), the air splicer (92) is positioned below the wire breaking clamp scissors (83), a bracket (95) is arranged on the right side of the air splicer (92), the bracket (95) comprises a bottom plate and two support arms, and the support arms and a wire pressing electromagnet (97) are fixed on the bottom plate;

The wire pressing electromagnet (97) comprises a telescopic shaft, and one end of the telescopic shaft is connected with the movable rod (96); two ends of the movable rod (96) are respectively connected with a U-shaped wire pressing rod (93), one end of the U-shaped wire pressing rod (93) close to the bottom wire breaker (8) is provided with four wire pressing openings, and the other end of the U-shaped wire pressing rod (93) is connected with a support arm of the bracket (95) through a movable shaft (94);

the air splicer (92) is provided with a front wire fixing rod (98) and a rear pressing groove wire fixing coil (99), and the front wire fixing rod (98) and the rear pressing groove wire fixing coil (99) are respectively arranged at two sides of the broken wire clamp scissors (83).

9. The automatic bottom thread receiving device of the flat seam sewing equipment according to claim 1, characterized in that a bottom thread seat (102) is arranged on the bedplate (3), and a group of thread grooves (103) are arranged at the front part of the bottom thread seat (102); the bottom wire is placed on the bottom wire seat (102) in a cylindrical wire form, and is introduced into the rear pressing groove fixed coil (99) after entering the lower part of the bedplate (3) through the wire groove (103).

10. The automatic bottom line connecting device of the flush joint type sewing apparatus according to claim 1, further comprising a host control system (101), wherein the host control system (101) controls the operation of the displacement sensor (43), the line detecting electromagnet (45), the motor (55), the winding electromagnet (57), the servo motor (67), the line breaking electromagnet (82), the air splicer (92) and the line pressing electromagnet (97).