746results about "Pressers" patented technology

The invention provides a sewing starting control method based on presser foot lifting feeding. The sewing starting control method comprises the following steps that an electric control unit, a presser foot rod, a presser foot and a presser foot lifting mechanism are arranged in a sewing machine; after the sewing material to be sewn is placed, the presser foot is put down, and the electric control unit receives a thick material sewing starting signal; before a feeding tooth sinks downwards into a needle plate during sewing of a first needle, an electric control unit controls a presser foot lifting driving source to act, the presser foot lifting driving source drives a presser foot rod and a presser foot to move upwards through a presser foot lifting transmission unit, the presser foot is lifted to the sewing target height, and the upwarp angle of the presser foot relative to the horizontal plane is reduced; at the moment, the presser foot is still pressed and attached to the sewing starting part of the to-be-sewn sewing material, and the horizontal component force of the pressure applied to the sewing starting part of the to-be-sewn sewing material by the presser foot is not larger than the maximum static friction force between the sewing starting part of the to-be-sewn sewing material and the sewing machine needle plate; in this way, after the feeding teeth sink downwards into the needle plate in the first stitch starting process, the undesirable phenomenon that the sewing starting part of the sewing material to be sewn is pushed away by the presser foot is avoided, and sewing starting material pushing is effectively avoided.

The present application provides a cloth feeding mechanism and a sewing machine for a sewing machine, specifically relating to the technical field of sewing machine manufacturing. The cloth feeding mechanism has a cloth feeding drive source and a lifter drive source. The cloth feeding drive source indirectly drives the tooth carrier of the cloth feeding mechanism. While the cloth feeding drive source indirectly drives the tooth carrier, the lifter drive source directly drives the same tooth carrier to generate a swinging motion. The tooth carrier and its cloth feeding teeth, under the combined action of the lifter drive source and the cloth feeding drive source, cause the cloth feeding teeth to perform a cloth feeding action. By using the cloth feeding drive source to indirectly drive the tooth carrier of the cloth feeding mechanism, and while the cloth feeding drive source indirectly drives the tooth carrier, the lifter drive source directly drives the same tooth carrier to generate a swinging motion, it is realized that the tooth carrier and its cloth feeding teeth, under the combined action of the lifter drive source and the cloth feeding drive source, cause the cloth feeding teeth to perform a cloth feeding action. The present application makes full use of the drive source of the sewing machine, effectively improves the utilization efficiency of the power of the sewing machine, greatly reduces the manufacturing cost of the sewing machine, and has high value for use and promotion.

The present invention provides a driving device for thread cutting, presser foot lifting and needle pitch adjustment, belonging to the technical field of sewing machines. It solves the problems such as reduced working efficiency of the existing device when meeting the requirements of driving thread cutting, presser foot lifting and needle pitch adjustment by one motor. The driving device for thread cutting, presser foot lifting and needle pitch adjustment includes a motor. A separately arranged thread cutting cam, a presser foot lifting cam and a needle pitch adjusting cam are fixedly connected to the rotating shaft of the motor. Both the thread cutting cam and the presser foot lifting cam are diamond-shaped, and the needle pitch adjusting cam is a curved quadrilateral. The needle pitch adjusting mechanism abuts against the outer peripheral wall of the needle pitch adjusting cam. When the effective needle pitch adjusting section of the needle pitch adjusting cam acts on the needle pitch adjusting mechanism, the thread cutting idle stroke surface of the thread cutting cam acts on the thread cutting mechanism, and the lifting idle stroke surface of the presser foot lifting cam acts on the presser foot lifting mechanism. This device meets the requirements of driving thread cutting, presser foot lifting and needle pitch adjustment by one motor and improves the working efficiency of the sewing machine at the same time.

The invention provides a cloth stem-crossing detection sewing device and method. The cloth stem-crossing detection sewing device comprises a first presser foot rod provided with an outer presser foot, a second presser foot rod provided with an inner presser foot, a presser foot transmission mechanism, a control module, a sewing material thickness detection sensor, an alternating quantity adjusting mechanism, an alternating quantity detection sensor and an alternating quantity adjusting driving source. The sewing material thickness detection sensor is obliquely mounted at the bottom of the sewing machine shell; detection points, falling on the sewing material, of the sewing material thickness detection sensor are distributed on the rear sides of the outer presser foot and the inner presser foot in the feeding direction of forward feeding during forward sewing of the sewing machine; the presser foot transmission mechanism is provided with a transmission swing seat for determining the alternating quantity of presser feet, and the alternating quantity adjusting driving source is connected with the transmission swing seat through the alternating quantity adjusting mechanism. The sewing material thickness is effectively detected in advance, so that the presser foot alternation amount is adjusted in time, the presser foot alternation amount of the sewing machine adapts to the change of the sewing material thickness, efficiency is improved, stem-crossing stitches are beautified, and sewing quality is guaranteed.

The utility model relates to a machine head integrated cutter structure which comprises a machine shell and a mounting shell integrally formed on the machine shell, a first cavity and a second cavity are formed in the mounting shell, a sliding rod and a driving structure for driving the sliding rod to vertically slide are arranged on the first cavity in a sliding mode, and the top end of the sliding rod is located in the first cavity; the bottom end of the sliding rod downwards penetrates through the first cavity, and the cutter is installed at the bottom of the sliding rod. The driving structure comprises a motor, a sliding spring and a cam; the cam is rotationally connected to the inner wall of the first cavity, the axis of the cam is transverse, and the motor drives the cam to rotate; a sliding block is arranged at the top end of the sliding rod, the sliding spring is located between the sliding block and the inner wall of the first cavity and jacks up the sliding block, and the cam rotates to press the sliding block downwards to enable the cutter to cut the line. The second cavity is used for installing the presser foot mechanism and communicates with the first cavity, and the sliding rod is connected to the first cavity in a sealed and sliding mode. The cutter structure has the effect that the cutter structure is more convenient to lubricate.

The invention relates to the technical field of sewing machines, in particular to a sewing machine presser foot lifting control method, which is characterized in that a main shaft motor, a feed lifting motor, a driving motor, a main shaft driven by the main shaft motor to rotate, a feed dog frame positioned below a needle plate and a feed dog mounted on the feed dog frame are arranged in the sewing machine; the main shaft drives the tooth frame and the feeding teeth to move back and forth in a reciprocating manner through a feeding mechanism connected between the main shaft and one end of the tooth frame; the feed lifting motor drives the feed rack and the feeding teeth to reciprocate up and down through a feed lifting mechanism connected between the feed lifting motor and the other end of the feed rack; the driving motor drives the presser foot to lift through a presser foot lifting mechanism connected between the driving motor and the presser foot; and before the driving motor drives the presser foot lifting mechanism to execute the presser foot lifting action, the feed dog lifting mechanism is driven by the feed dog lifting motor to enable the feed dog to be below the needle plate. The cloth cannot be dragged even if the feeding teeth move back and forth when the presser foot is lifted, so that the cloth can be conveniently taken and placed, the cloth is protected from being scratched, and the influence on the use of customers is avoided.

The invention discloses a trademark stitching template which comprises a base cloth clamping piece, a top plate and a movable pressing plate. The bottom cloth clamping piece comprises a bottom plate provided with a nail seam through hole in a penetrating manner and a core plate which is provided with a trademark embedding hole in a penetrating manner and is superposed on the bottom plate; a limiting hole is formed in the top plate in a penetrating manner, and the top plate is removably stacked on the side, deviating from the bottom plate, of the core plate; the movable pressing plate is movably arranged in the limiting hole, provided with a pressing foot positioning hole in a penetrating mode and provided with a trademark abutting face. During use, the presser foot is matched in the presser foot positioning hole of the movable pressing plate in a concave-convex mode, the movable pressing plate moves relative to a trademark and evenly presses the two sides of a sewing needle while the presser foot moves along a preset closed pattern track, it is guaranteed that trademark stitching stitches are accurate, stitching tension is even, and then it is guaranteed that base cloth after trademark stitching is smooth and free of wrinkles; and the quality consistency of trademark stitching can be improved. The invention further discloses trademark nailing equipment and a trademark nailing method based on the trademark nailing template.

The utility model discloses a turn-over device. The turn-over device comprises a mounting seat, a first pressing mechanism, a second pressing mechanism and a turn-over mechanism, the second pressing mechanism comprises two lifting pressing assemblies; the turn-over mechanism comprises a plurality of blowing assemblies and pressing and folding assemblies. The utility model further discloses automatic top fly sewing equipment. According to the sewing machine, the first pressing mechanism is arranged and used for fixing sewing cloth; the lifting press-fit assembly is arranged to be used for pressing and loosening the folded part of the front fly material, the blowing assembly is arranged in cooperation to provide a blowing function to blow the folded part of the front fly material, the pressing and folding assembly folds the folded part of the front fly material, and automation is improved; according to the automatic top fly sewing equipment, full-automatic machining of automatic feeding of materials to be sewn, automatic top fly turning, sewing machining and discharging is achieved, the automation efficiency is improved, the labor intensity and cost of workers are reduced, and the production efficiency and quality of shirts are improved.

The present invention proposes a sewing machine with stitch length adjustment and zero-position positioning of a swing seat, specifically relating to the technical field of sewing machine manufacturing, comprising a driving source, a connecting rod, and a swing seat, characterized in that it also comprises an adjusting wheel and a slider, wherein the driving source drives the slider on the output shaft to indirectly position the swing seat at zero, and the slider is arranged on a slide groove of the adjusting wheel, the adjusting wheel is connected to the connecting rod, and the connecting rod is hinged to the swing seat. The present application has the characteristics of high accuracy in positioning the zero point of the swing seat, the static positioning wheel is fixed and equipped with an adjusting wheel to make the operation more stable, the gap between the various components is small after positioning, the degree of mechanical wear of the various components is small, and the noise is relatively low, which has the advantages of stable operation and high promotion and use value.

The utility model provides a swing mechanism in a sewing machine or a button sewing machine, and belongs to the technical field of sewing machines. The button sewing machine solves the problem of how to enable the moving precision of buttons on the button sewing machine to be high. And the like. According to the swing mechanism in the sewing machine or the button sewing machine, the sewing machine or the button sewing machine comprises a rack, a first power source and a swing bottom plate are arranged on the rack, the swing mechanism comprises a swing disc and a connecting rod assembly, the first power source is connected with the swing disc and can drive the swing disc to swing relative to the rack, a first through groove is formed in the swing disc, and a second through groove is formed in the connecting rod assembly. The inner end of the connecting rod assembly is hinged to the first through groove and can slide in the first through groove, and the outer end of the connecting rod assembly is connected with the swing bottom plate. The inner end of the connecting rod assembly is hinged into the first through groove, the first through groove plays a role in limiting swinging of the connecting rod assembly, the swinging precision of the swinging bottom plate is improved, and the moving precision of the button on the swinging bottom plate is improved.

The utility model belongs to the technical field of sewing machines, and particularly relates to a double-stepping overedger which comprises a machine body, and a thread trimming assembly, a presser foot lifting assembly, a feed lifting tooth shaft and a feeding tooth frame are arranged in the machine body. The first stepping motor is arranged on the side face of the machine body, a first motor shaft is arranged in the first stepping motor, and double cams are installed on the periphery of the first motor shaft and used for driving the thread trimming assembly and the presser foot lifting assembly to act; the second stepping motor is arranged on the side face of the machine body, a second motor shaft is arranged in the second stepping motor, a first crank is installed on the periphery of the second motor shaft, and one end of the first crank is connected with a connecting rod. The second stepping motor can control the height of the feeding tooth frame, the rotation angle of the stepping motor is utilized to enable the teeth to operate according to the set height, through double-stepping control, non-pneumatization and non-electromagnet are achieved, production noise can be lowered, and the sewing effect is improved.

The invention belongs to the technical field of sewing equipment, and particularly relates to cloth bilateral fixing type sewing equipment which comprises a cloth conveying assembly, an electric sliding table is arranged at the bottom of the cloth conveying assembly, an electric sewing machine is slidably connected to the top of the electric sliding table, and the electric sewing machine is located at the center of the central axis of the cloth conveying assembly. The top of the cloth conveying assembly is used for conveying cloth, in the conveying process, the first cloth fixing assembly and the second cloth fixing assembly are used for moving downwards, the two edges of the cloth are fixed and the cloth is synchronously pressed in the process of approaching the cloth conveying assembly, and after the pressed cloth enters the electric sewing machine, the cloth is fixed by the first cloth fixing assembly and the second cloth fixing assembly. The electric sliding table is used for driving the electric sewing machine to move in a reciprocating mode and used for sewing cloth with the two sides fixed, and the two sides of the cloth can be reasonably fixed before and after sewing.

A sewing machine external unit includes: a holder holding fabric; a driver being detachable from a bed of a sewing machine and driving the holder along an upper surface of the bed; a pressing member moving in an up-down direction according to movement of a sewing needle in the up-down direction, pressing the fabric while the sewing needle is stuck in the fabric, and rising together with the sewing needle in response to the sewing needle coming out of the fabric and rising; a position detector detecting a position of the pressing member in the up-down direction; a signal output part outputting a signal to the sewing machine; and a controller outputting a needle drive signal for driving the sewing needle from the signal output part to the sewing machine, and controlling driving of the holder and / or the sewing needle based on a detection result of the position detector.

The utility model provides a trimming and presser foot lifting mechanism of a button sewing machine, which comprises a driving motor, a presser foot lifting driving block, a trimming driving block, a trimming blade and a button clamp block which are arranged in a machine shell, a driving cam is arranged on an output shaft of the driving motor, the presser foot lifting driving block and the trimming driving block both abut against the side face of the driving cam, and the button clamp block is arranged on the side face of the driving cam. When the driving motor drives the driving cam to rotate, the driving cam sequentially drives the thread trimming driving block and the presser foot lifting driving block to rotate, and the rotating thread trimming driving block and the rotating presser foot lifting driving block respectively drive the thread trimming blade and the button clamp block to sequentially rotate through linkage pieces. According to the trimming and presser foot lifting mechanism of the button sewing machine, the driving motor drives the driving cam to rotate, trimming and lifting are driven in a staggered mode, trimming is conducted firstly, then presser foot lifting is conducted, trimming thread ends are shorter, stitches are more attractive, the subsequent thread end trimming process does not need to be set, and therefore the production cost is reduced.

The utility model belongs to the technical field of bag opening machines, and relates to a moving mechanism of a bag opening machine pressing frame assembly, which comprises a cross beam erected above a workbench, and the bottom of the cross beam is provided with an upper sliding table connecting plate which is driven by a transverse driving mechanism to slide along the transverse direction. A lower sliding table connecting plate which is driven by a longitudinal driving mechanism to slide in the longitudinal direction is arranged at the bottom of the upper sliding table connecting plate, and the transverse driving mechanism comprises a transverse synchronous belt assembly and a transverse displacement motor which is in transmission connection with the transverse synchronous belt assembly through a transverse motor transmission mechanism. The longitudinal driving mechanism comprises a longitudinal synchronous belt assembly and a longitudinal displacement motor in transmission connection with the longitudinal synchronous belt assembly through a longitudinal motor transmission mechanism, a pressing frame connecting plate is arranged at the front end of the bottom of the lower sliding table connecting plate, and a pressing frame assembly is fixedly connected to the front end of the pressing frame connecting plate. The moving mechanism of the bag opening machine pressing frame assembly has the advantages of being simple in structure, low in cost, convenient to maintain and high in moving speed.

The utility model relates to the technical field of bartacking machines, in particular to a combined driving mechanism of a bartacking machine and the bartacking machine. Comprising a thread sweeping mechanism used for executing a thread sweeping action; the presser foot lifting mechanism is used for executing a presser foot lifting action; the thread trimming mechanism is used for executing a thread trimming action; the driving motor is used for driving the thread sweeping mechanism, the presser foot lifting mechanism and the thread trimming mechanism to work; the thread sweeping mechanism comprises a thread sweeping action assembly, a thread sweeping mechanism and a thread sweeping mechanism, the transmission arm is used for being connected with the driving motor; the thread sweeping connecting rod is used for connecting the thread sweeping action assembly and the transmission arm, so that the driving motor can drive the thread sweeping action assembly to execute the thread sweeping action; the thread sweeping mechanism further comprises an independent driving assembly, and the independent driving assembly can independently drive the thread sweeping mechanism to work.

The tail end sewing device structurally comprises a shell, a sewing groove and a fixing base, the sewing groove is formed in the end face of the shell, a guide structure and a transmission device are arranged in front of and behind the sewing groove respectively, a penetrating hole is formed in the middle of the sewing groove, and the fixing base is fixed to the top of the shell. The shell is connected with a flange at the tail end of the manipulator, a transmission fluted disc is arranged in the shell and is in meshed connection with a first servo motor, a limiting pipe is fixedly installed at the right position in the shell, a needle seat is installed on the end face of the limiting pipe, and the bottom of the needle seat is connected with a suture needle in a clamped mode. The second servo motor is meshed with the gear to drive the transmission roller to rotate and make contact with the end face of the prefabricated part to drive the transmission roller to move, then the prefabricated part is supported by the driven wheel to move, the situation that the prefabricated part deviates leftwards and rightwards in the sewing process is prevented, the situation that sewing of the prefabricated part deviates is avoided, and the quality of produced products is improved.

The invention relates to an automatic sewing device and method for sound insulation cotton and hook-and-loop fastener adhesive tape, the automatic sewing device comprises a feeding mechanism, a material taking mechanism, a material receiving mechanism, a material pressing mechanism, a template machine and a discharging mechanism, the input end of the material taking mechanism is arranged relative to the output end of the feeding mechanism; the output end of the material taking mechanism and the output end of the material receiving mechanism are arranged relative to the input end of the material pressing mechanism, the discharging mechanism is arranged relative to the output end of the material pressing mechanism, and the template machine is arranged relative to the material pressing mechanism. According to the design, the feeding mechanism, the material taking mechanism, the material receiving mechanism, the material pressing mechanism and the discharging mechanism are integrated, full-process automatic operation can be achieved, all the mechanisms work cooperatively, human intervention is reduced, the sewing consistency of sound insulation cotton and hook-and-loop fasteners is effectively improved, and the product quality stability is guaranteed; and meanwhile, each mechanism can realize respective independent operation, so that invalid waiting time is avoided, the procedure connection efficiency is greatly improved, and the efficient mass production requirement is met.

The utility model discloses a horizontal sewing machine set, which belongs to the technical field of sewing equipment and comprises a sewing machine body and a horizontally arranged placing platform, a needle head of the sewing machine body is horizontally arranged and moves in the horizontal direction, a positioning seat is fixed on the sewing machine body, and the end part of the positioning seat is arranged above the top surface of the placing platform. A positioning seat is arranged on the sewing machine body, a shuttle matched with a needle head for use is arranged on the positioning seat, the positioning seat is used for being attached to the inner wall, close to the needle head on the sewing machine body, of a product so as to position the product, and when the sewing machine is used, the placing platform is arranged, the product to be machined is flatly placed on the placing platform and then moved to complete sewing of the product to be machined. Due to the fact that the to-be-processed product can be stably placed on the placing platform, the sewing machine can thread on the placing platform smoothly and evenly, meanwhile, workers only need to translate the to-be-processed product, and physical strength consumed by the workers can be effectively reduced.

The utility model relates to a quick-adjusting outer pressing frame of a pocket patching machine and the pocket patching machine, the quick-adjusting outer pressing frame of the pocket patching machine comprises a supporting frame, the interior of the supporting frame is a working area, and a strip-shaped first guide hole is formed in the supporting frame; the pressing plates are distributed in the working area according to preset positions; each pressing plate is connected with the supporting frame through the corresponding connecting seat, and at least two connecting seats are movable connecting seats with adjustable positions; the first guide piece penetrates through the first guide hole and is connected with the movable connecting seat so as to keep the relative position of the movable connecting seat and the supporting frame; the driving handle is installed on the supporting frame in a sliding mode and is in linkage with all the movable connecting bases. According to the rapidly-adjusted outer pressing frame of the pocket patching machine, the spatial positions of the pressing plates can be rapidly adjusted through the driving handle, so that the outer pressing frame can be rapidly adjusted according to cloth of different sizes, operation is convenient, and economical efficiency is good.

A sewing machine has a throat plate (3a) and a material hold-down foot (13) for performing a lifting movement to hold down the material on the throat plate (3a) during a sewing operation. A driven stroke amplitude adjusting device (17) serves to adjust a stroke amplitude of the lifting movement of the material hold-down foot between a top dead center and a bottom dead center. A driven stroke level adjusting device serves to adjust a stroke level of the lifting movement of the material hold-down foot (13) relative to the throat plate (3a). A control / regulating device (11) is in signal communication with the stroke amplitude adjusting device (17) and with the stroke level adjusting device. Operating methods that are possible with the sewing machine are also specified. The result is a sewing machine with which sewing material of different thicknesses and / or different numbers of layers can be sewn precisely and flexibly.

A spring bed mesh sewing device includes a feeding assembly, sewing assemblies, and cloth pressing assemblies. The feeding assembly can lay spring strings in the transverse direction. Each of the spring strings to be sewn in even rows is sewn on a respective previous spring string through the first sewing positions, each of the spring strings to be sewn in odd rows is sewn on a respective previous spring string through the second sewing positions. The sewing assemblies are arranged at intervals in the transverse direction and are movable in the vertical direction. Each sewing assembly includes a sewing head and a base with a sewing channel extending in the vertical direction. The sewing head can sew two adjacent rows of spring strings along the sewing channel. The cloth pressing assemblies are arranged at intervals in the transverse direction and correspond to the sewing assemblies in the longitudinal direction.

The invention relates to a sewing machine and a cloth pricking stroke adjusting device thereof. The cloth pricking stroke adjusting device comprises a driving mechanism, and an output shaft of the driving mechanism rotates to drive a presser foot lifting cam and an adjusting crank to rotate to a working position; the working positions comprise at least one adjusting position of the presser foot lifting cam and at least one adjusting position of the adjusting crank; the adjusting position of the presser foot lifting cam corresponds to the upper limit position and the lower limit position of the foot lifting module; the adjusting crank is hinged to the adjusting connecting rod, the adjusting position of the adjusting crank corresponds to the target angle of the adjusting crank, and the driving mechanism drives the adjusting crank to swing to the target angle, so that the position of the fixed end of the adjusting connecting rod changes along with the target angle of the adjusting crank. By adjusting the position target of the fixed end of the connecting rod, the target cloth puncturing stroke is correspondingly adjusted, the cloth puncturing stroke adjusting device is applied to the sewing machine, and the sewing machine with the cloth puncturing stroke adjusting function is obtained.

The utility model discloses a top fly machine, which relates to the technical field of sewing machines and comprises a workbench provided with a top fly processing area for placing cloth. The sewing mechanism comprises a machine head and an X-direction driving assembly, and the X-direction driving assembly is used for driving the machine head to slide in the X direction; the cutting mechanism is arranged above the front fly machining area and comprises a first cutting driving assembly, a second cutting driving assembly, a linear cutting knife and an angle knife, the first cutting driving assembly is used for driving the linear cutting knife to vertically ascend and descend, and the second cutting driving assembly is used for driving the angle knife to vertically ascend and descend; the presser foot mechanism can be pressed down above the cloth in the front fly processing area to drag the cloth to walk in the Y direction. According to the utility model, a single sewing needle can be adopted to sew on cloth according to a U-shaped track, the cost of a machine head is reduced, a Y-shaped kerf can be processed, and the production requirement is met.

The utility model discloses a flexible freight bag sling sewing machine, and relates to the field of flexible freight bag processing, in particular to a flexible freight bag sling sewing machine which comprises a sewing machine body, the body is provided with a U-shaped supporting plate, the supporting plate is provided with a positioning strip used for supporting a flexible freight bag sling, the positioning strip is internally provided with a movable cavity, and the movable cavity is internally provided with a clamping groove. According to the flexible freight bag sewing machine, the problems that when an existing flexible freight bag sewing machine is used for sewing the hanging belts, the fixing effect on the hanging belts is poor, the hanging belts are prone to deformation, sewing lines can move, use of the flexible freight bags can be affected, and the safety of the flexible freight bags is affected are solved. Moreover, the widths of different suspenders are different, and the required positions of suture lines are also different.

The invention relates to a presser foot lifting control method of a sewing machine and the sewing machine, and the presser foot lifting control method of the sewing machine comprises the following steps: receiving a voltage value of an electronic pedal; when the sewing machine is in the first state, determining a target presser foot lifting mode and a preset presser foot lifting height according to sewing requirements; the first state comprises a sewing state; according to the voltage value and the target presser foot lifting mode, the target presser foot lifting height of the presser foot is determined; the target presser foot lifting height is smaller than or equal to the preset presser foot height. By means of the presser foot lifting device, the situation that the presser foot is collided with the machine needle in the sewing process is avoided, and meanwhile the sewing efficiency is improved by combining automatic control over the height of the presser foot lifting device.

The utility model discloses a positioning cutting assembly of a full-automatic top fly sewing machine, which comprises a sewing machine body provided with a sewing table, the sewing table is provided with an empty groove, a sliding panel is arranged in the empty groove, and a cutting knife groove is arranged in the sliding panel in a penetrating manner; the positioning plate is arranged at the bottom of the sewing table; the adjusting assembly comprises an electric lead screw and a supporting plate, a limiting template is arranged at the bottom of the electric lead screw, the limiting template is arranged at the top of the sliding panel, and the electric lead screw is used for driving the limiting template to ascend and descend; the first air cylinder is arranged at the bottom of the cutting knife groove, and a lifting rod is arranged at the output end of the cutting knife groove. The outer side of a sewn product can be pressed and positioned before sewing, it is ensured that the product cannot move or incline in the sewing process, sewing work is accurately and efficiently completed, sewing lines can be cut from the bottom, and the situation that follow-up sewing work is affected due to the fact that the lines are not cut off is avoided.

To provide a vertical feeding sewing machine having good workability.SOLUTION: A vertical feeding sewing machine comprises: a feeding device 30 to feed a sewn object on a needle plate 14 by a feed dog from below the needle plate 14; an upper feeding device 40 to vertically move a presser foot 41 and a feed foot 42 alternately on the needle plate 14 and feed the sewn object on the needle plate 14 by the feed foot 42 from above the needle plate 14; an upper feeding height adjusting mechanism 60 to adjust height of vertical movement of the feed foot 42; and a pedal 96 capable of inputting operation by foot of an operator. The upper feeding height adjusting mechanism 60 raises the height of the vertical movement of the feed foot 42 by operation of the pedal 96.SELECTED DRAWING: Figure 8

The application relates to a height calibration method of a lifting presser foot, an electronic device and a storage medium. The height calibration method of the lifting presser foot comprises the following steps: controlling a driving member to run to a preset initial position; controlling the driving member to rotate clockwise by a first preset angle, so that the lifting presser foot runs to a first height; controlling the driving member to rotate counterclockwise by a second preset angle, so that the lifting presser foot runs to a second height; subtracting the first height from the second height to obtain a height difference; and adjusting the rotation angle of the driving member, so that the height difference is within a preset height difference range. Through the application, the problem of different heights of lifting presser feet in the related art is solved, and the heights of the lifting presser feet are consistent.

The invention provides a lower thread cutting device of a flat chain seam sewing machine. According to the utility model, the problem that the operator is difficult to understand and inconvenient due to the difference that whether the tension applied to the thread by the thread trapper can be released or not by operating the pedal and operating the presser foot lifting rod due to the presence or absence of the lower thread cutting device can be solved. The lower thread cutting device is provided with a lower thread cutting operation mechanism (5) which enables the thread loosening mechanism (4) and the lower thread cutting mechanism (3) to operate, and a presser foot lifting operation mechanism (6) which does not enable the lower thread cutting mechanism (3) to operate and enables the thread loosening mechanism (4) and the presser foot lifting mechanism (2) to operate. Therefore, the force of the thread trapper (11) can be released by operating the pedal plate with a foot regardless of the presence or absence of the off-line cutting device.