56results about "Thread-laying mechanisms" patented technology

The invention provides a sewing machine right thread hook, a thread passing mechanism, a sewing machine and a right thread hook upper thread track, the sewing machine right thread hook comprises a fixing portion and a guiding portion, the guiding portion is slidably connected to the fixing portion, an upper thread is arranged in the guiding portion in a penetrating mode, and the guiding portion can slide on the fixing portion along with the upper thread to enable the upper thread to be in a low-tension position. The guide part is connected to the fixing part in a sliding mode, so that the thread containing range of the thread passing part comprises the movement range of the thread clamping face of the large thread clamping device and the movement range of the thread passing hole of the take-up lever, when sewing work is carried out, the guide part can slide on the fixing part along with an upper thread, the upper thread is made to be located at the low-tension position all the time, the change amplitude of tension is reduced, and sewing efficiency is improved. And the problems of line throwing and line breaking are avoided.

The utility model relates to the technical field of sewing machines, in particular to a sewing machine material frame which comprises an installation bottom plate, the top end of the installation bottom plate is connected with a supporting assembly, the top end of the supporting assembly is connected with a top connecting plate, the front end of the top connecting plate is provided with a sliding connection block, and a clamping fixing assembly is arranged on the outer side of the supporting assembly. The top end of the clamping fixing assembly is provided with a fixing rod, the inner side of the fixing rod is provided with a tower line sleeving fixing assembly, the top end of the fixing rod is provided with a screwing adjusting cap, the fixing position of a tower line is limited through adjustment, and the lead adjusting assembly is arranged at the front end of a sliding connection block. The unfolding angle of the tower line sleeving and fixing assembly is controlled, the tower line can be limited, adjusted and placed, the use effect is prevented from being affected, clamping connection of the clamping and fixing assembly is easy to detach, the adjusting wire assembly at the top end moves up and down to adapt to machining environment adjustment, and the applicability of the equipment is improved.

The utility model relates to a sewing machine, which comprises a sewing machine main body assembly, a sewing machine main body structure and a sewing machine main body assembly, the sewing thread routing assembly comprises a thread trapper structure, a counter structure and a thread drawing device structure, and the thread trapper structure, the counter structure and the thread drawing device structure are all arranged on the sewing machine main body structure. According to the technical scheme, the problems that in the prior art, thread ends of the thread trimming and bird nest preventing technology of a sewing machine are different in length, and the control precision of the thread ends is not enough are effectively solved.

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.

Provided is an anti-nest structure of a sewing machine. Mainly solves the problems that the bird nest prevention structure of the existing sewing machine adopts an externally-mounted bird nest prevention structure, the cost is high, and the operation space is reduced. The device is characterized in that a power source (5) and a wire pulling piece (6) movably installed in the shell are arranged in the shell, the power source is used for driving the wire pulling piece to move, the wire pulling piece comprises a deflector rod (61), and part of the deflector rod extends out of the shell to be connected with the wire. According to the bird nest prevention structure of the sewing machine, a built-in structure is adopted, the space outside the shell cannot be occupied, operation is prevented from being affected, and the bird nest prevention function can be achieved.

The utility model discloses a bird nest preventing device of sewing equipment, and relates to the technical field of sewing equipment. Comprising a connecting base and a thread hooking piece, a sliding groove is formed in the bottom end of the connecting base, a first power source is arranged at one end of the connecting base, the telescopic end of the first power source is connected with one end of the thread hooking piece through a sliding block, the other end of the thread hooking piece is in a hook shape and penetrates through the wall face of the other end of the connecting base, and a limiting opening is formed in at least one side of the thread hooking piece; a wire clamping piece is further arranged at the other end of the connecting base and located at the bottom end of the wire hooking piece, a second power source is arranged at the top end of the connecting base, and the telescopic end of the second power source penetrates through the wall face of the top end of the connecting base and leads to the sliding groove; the first power source drives the thread hooking piece to hook the upper thread, then the upper thread is reset and pulled to move to the position above the thread clamping piece to achieve clamping of the upper thread, after needle raising, the telescopic end of the first power source stretches out again, the thread hooking piece stretches out of the thread clamping piece again to achieve thread loosening, and cloth is prevented from forming a bird nest structure.

The utility model discloses an automobile foot mat sewing device, which relates to the technical field of automobile foot mats and comprises a sewing table mechanism, a clamping mechanism is arranged on one side of the top of the sewing table mechanism, a laser calibration mechanism is arranged on the other side of the top of the sewing table mechanism, and a sewing mechanism is arranged in the middle of the top of the sewing table mechanism. Through the arrangement of the sewing table mechanism, when the foot pad is sewed, after the foot pad is fixed in the clamping mechanism, the placing plate is pushed to enable the sliding block to slide on the transverse sliding rod or the vertical sliding rod, so that the position of the foot pad fixed on the surface of the placing plate is adjusted, and the foot pad can be sewed conveniently in the sewing process. The sewing position can be flexibly adjusted without taking down the foot pad, meanwhile, due to the arrangement of the laser calibration mechanism, in the sewing process, a straight line is irradiated on the surface of the foot pad through the laser transmitter, the sewing line can be straight by sewing along the straight line, and sewing of the foot pad is more attractive and more convenient to use.

The thread jamming protection clutch mechanism of the sewing machine comprises a rotating shaft, a gear, a sliding piece and a hand wheel, a first crown gear is fixedly arranged on the rear end face of the gear, the sliding piece comprises a first ring body and a second crown gear meshed with the first crown gear, the first ring body is in sliding connection with the hand wheel in the axial direction, and the second ring body is in sliding connection with the hand wheel in the axial direction. An elastic piece used for driving the second crown gear to abut against the first crown gear is arranged between the first ring body and the hand wheel. The first crown gear and the second crown gear which are meshed with each other are arranged between the gear and the hand wheel, when thread winding occurs in the sewing machine, torque transmitted by rotating the hand wheel exceeds a critical value, the elastic piece can be further compressed until the first crown gear and the second crown gear are separated from each other, and clutch slipping is achieved. Therefore, strong rotation of the hand wheel to the rotating shaft is avoided, and transmission parts of the sewing machine are protected against damage or displacement.

The present invention relates to a double-needle two-color pattern machine, including a workbench, a fixed frame, which is arranged above the workbench and fixed relatively to the workbench; a machine base, which is arranged on the fixed frame, and the first and second machine needles arranged vertically are installed on the machine base, and the machine base is arranged to rotate around its own axis so that the first machine needle or the second machine needle corresponds to the workstation; a clamping mechanism, which has two groups of clamping components respectively used to clamp or release the surface thread on the first machine needle and the surface thread on the second machine needle; a driving component, the power output end of which is connected to the clamping mechanism drive, so that the two groups of clamping components correspond to the workstation one by one; a hooking plate, which corresponds to the workstation and is arranged to be able to transport the surface thread at the workstation to the corresponding clamping component. The entire operation process is more convenient, fast, time-saving and labor-saving, and reduces costs.

The utility model belongs to sewing machine technical field, especially point to a kind of for the stabilizing structure of the thread shifting lever of multi-needle sewing machine, it includes slider slide rail group, connecting seat and adjusting lever, the slider slide rail group includes slider and slide rail, the slide rail is fixed on sewing machine body, the slider is slidably arranged on slide rail, the sewing machine body is provided with thread shifting lever, the thread shifting lever moves left and right with sewing machine work, the connecting seat is arranged on slider, one end of the adjusting lever is connected with thread shifting lever, its other end is adjustably connected with connecting seat, the adjusting lever, connecting seat and slider move with thread shifting lever moves, the utility model aims at providing a kind of stabilizing structure for the thread shifting lever of multi-needle sewing machine, which is reasonable in structure and simple, can move with thread shifting lever, and play the stabilizing effect.

The sewing machine needle bar thread hook comprises a thread hook body and a thread hook skirt edge, the thread hook skirt edge is arranged on the thread hook body, and a gap between the thread hook skirt edge and the thread hook body serves as a thread passing opening. And the upper thread is wound on the needle rod thread hook through the thread passing opening. The thread hook skirt edge is arranged on the thread hook body, the thread passing opening is formed between the thread hook body and the thread hook skirt edge, the end, away from the thread hook body, of the thread hook skirt edge is located on the outer side of the projection of the thread hook body in the vertical direction, and an upper thread can directly swing into the thread passing opening from the end of the thread hook skirt edge. The problem that the threading process is difficult due to a hole type threading mode in the prior art is solved, and threading convenience is improved.

The utility model relates to the technical field of sewing thread leading, in particular to a thread leading device for trousers sewing. Comprising a shell assembly, an adjusting assembly and a lead assembly, the shell assembly comprises an outer shell, a sliding groove is formed in one end of the outer shell, a positioning hopper is arranged on the inner side of the upper portion of the outer shell, a hollow stand column is connected to the lower end of the positioning hopper, the adjusting assembly comprises an adjusting frame, and an adjusting shaft is connected to the inner side of the adjusting frame; the lead assembly comprises a mounting ring, and the end, away from the mounting ring, of the connecting rod is connected with a limiting ring. When the sliding block is driven by the linkage rod to move, the sliding block drives the bearded needle to move towards the thread leading hopper in the moving process, then the end, away from the sliding block, of the bearded needle sequentially penetrates through the thread leading hopper, the stand column through hole and the bearded needle groove, a hook of the bearded needle is inserted into the thread leading groove, and then a thread is hung on the hook of the bearded needle. The crochet hook can be conveniently inserted into and penetrate through the crochet hook groove through the thread leading hopper.

The utility model discloses a thread shifting device of a jujube making machine for garment processing, which relates to the technical field of jujube making machines and comprises a jujube making bartacking machine, a mounting component is arranged at the left end of the jujube making bartacking machine, a bidirectional motor is fixedly connected to the left side of the mounting component, and a driving gear is fixedly connected to the output end of the bidirectional motor. The bottom end of the driving gear is connected with a driven gear in a meshed mode, the driven gear is rotationally connected to the left side of the installation assembly, the left side of the driven gear is fixedly connected with a connecting rod, the bottom end of the connecting rod is fixedly connected with a wire shifting plate, and the front side and the rear side of the wire shifting plate are each provided with a wire shifting groove. The rotating driving gear drives the driven gear to rotate, then the connecting rod swings, the swinging connecting rod enables the thread shifting plate to swing and further act on a thread end, the thread end is pulled out from the bottom of the presser foot, manual operation is not needed, the working efficiency is improved, and the phenomenon that the hand is stabbed by a machine needle during manual thread shifting is avoided.

The utility model discloses a blanket overlock machine which comprises a protective outer cover, a lower needle mechanism and an upper thread mechanism. The middle part of the right end of the upper surface of the protective outer cover is fixedly connected with a mounting frame, and the upper surface of the mounting frame is rotationally connected with bobbin supporting frames which are bilaterally symmetrical; the lower needle mechanism comprises a lower needle outer cover and a sliding supporting frame, the lower needle outer cover is fixedly connected to the front side face of the left end of the protective outer cover, the sliding supporting frame is slidably connected to the interior of the lower needle outer cover, a connecting frame is fixedly connected to the lower end of the inner wall of the sliding supporting frame, and an overlock needle is fixedly connected to the lower end of the connecting frame; the thread feeding mechanism comprises a rotating supporting shaft and a gear, the rotating supporting shaft is rotationally connected to the lower side of the left end of the rear wall of the front end of the protective outer cover, the blanket overlock machine is higher in needle feeding efficiency and needle feeding penetrating power, the blanket can be overlocked conveniently, meanwhile, the thread feeding efficiency is higher, the blanket overlock efficiency is higher, and two-thread overlock is firmer.

The utility model discloses an auxiliary threading mechanism of a sewing machine, which comprises a sewing machine shell, a guide hook, a guide plate, a take-up lever and a guide slider, the guide hook, the guide plate and the take-up lever are arranged on the sewing machine shell, the lower end of the guide plate is provided with a guide tip protruding out of the sewing machine shell, and the guide slider is slidably arranged on the outer surface of the sewing machine shell. The outer surface of the sewing machine shell is provided with an identification path for indicating the movement direction of the guide sliding block, the guide sliding block is provided with a connecting part, during threading, one end of a sewing thread is connected with the connecting part, and the guide sliding block is moved to drive the connecting part to sequentially pass through the guide plate, the guide tip part and the take-up lever along the identification path; the sewing upper thread threading device can assist an operator in correctly threading the sewing upper thread. The sewing upper thread threading device has the advantages that the sewing upper thread can be sequentially wound on the guide tip part and the thread take-up lever.

To enable an operator to insert a thread wound out from a new bobbin into a thread inlet from a front side of a sewing machine with high workability by looking straight at the thread inlet with high discriminability when exchanging a thread.SOLUTION: A thread guide device of an embroidery sewing machine includes a spool holder 1 on which a support member for supporting a bobbin B and a thread inlet for allowing a thread T wound out from the bobbin B to be inserted are provided, a tension table 15 provided in front of the thread holder 1, and a flexible tube 10 for guiding the thread T inserted from the thread inlet toward the tension table 15. The thread inlet opens forward and is located at a level higher than the bobbin B. The tube 10 extends backward from the thread inlet and is bent and extends forward.SELECTED DRAWING: Figure 1

In sewing methods using a sewing machine, this makes it easier to maintain the correct tension of the upper thread. [Solution] In a sewing method using a sewing machine 10 equipped with an upper thread tension device 11, a thread guide 12 for changing the direction of the upper thread T that has passed through the upper thread tension device 11, and a balance beam 13 that can pull up the upper thread T while it is passing through the thread guide 12, the sewing machine 10 further equipped with an upper thread guide member 100 having a first guide section 120 for changing the direction of the upper thread T that has passed through the thread guide 12 and directing it back towards the thread guide 12, the upper thread T that has passed through the thread guide 12 is passed through the first guide section 120 to change its direction, passed back through the thread guide 12 before passing it through the balance beam 13, and then sewing is performed while it is passed through the balance beam 13.

To provide a yarn standing device capable of holding a yarn with good workability and a sewing machine.SOLUTION: A yarn standing device 2 has a yarn standing rod 3 to which a yarn reel 10 is fitted, a yarn hooking base 16 on which a yarn 9 wound around the yarn reel 10 is hooked, and a yarn holding slider 21 that can slide with respect to the yarn hooking base 16 and slides between a first position to cover a yarn hooking part 8 on which the yarn is hooked of the yarn hooking base 16 and a second position to expose the yarn hooking part 8. A yarn 9 hooked on the yarn hooking part 8 is held by sliding the yarn holding slider 21 to the first position.SELECTED DRAWING: Figure 3

The utility model relates to the technical field of sewing machines, and discloses a sewing machine anti-winding structure which comprises a sewing bottom plate, a first threaded hole is formed in the upper surface of the sewing bottom plate, a fixing bolt is in threaded connection with the interior of the first threaded hole, and the surface of the fixing bolt is in threaded connection with a connecting plate through a second threaded hole. And a sewing machine body is fixedly mounted on one side of the connecting plate. Compared with the prior art, the thread winding device has the following advantages and effects that through matched arrangement of the servo motor, the transmission rod, the rotating disc, the fixed threaded rod and the nut, a thread shaft is connected to the surface of the fixed threaded rod in a sleeving mode during use, then a worker rotates the nut to tighten and fix the thread shaft, and then the transmission rod and the rotating disc are driven to rotate through an external power source of the servo motor; and a fixed threaded rod is driven to rotate through a rotating disc, so that the effects of conveniently and uniformly conveying the sewing thread and preventing breakage caused by non-uniform conveying are achieved, and the practicability of the device is improved.

To provide a sewing data edition device, a sewing data edition program, and a sewing machine that are configured to generate sewing data that enables strap members at corners of a pattern to be sewn on an object to be sewn with a higher possibility than that of the prior art when performing couching using a sewing machine.SOLUTION: A sewing data edition device for editing sewing data for couching using a sewing machine comprises the steps of: acquiring coordinate data indicating the position of each of a plurality of dots along a predetermined pattern and detecting corner parts having an angle lower than a predetermined angle in the predetermined pattern based on the coordinate data of each of the plurality of dots (S35); and editing the sewing data using edition conditions different for a plurality of first needle location points corresponding to the corner parts in the predetermined pattern and a plurality of second needle location points corresponding to non-corner parts that not have been detected as corners, based on the coordinate data of each of the plurality of dots and the detection result of a corner detection unit (S37, S39, S40).SELECTED DRAWING: Figure 6

The utility model discloses a silk thread sewing machine head which comprises an adapter, a needle bar, a needle bar driving mechanism, a guide ring and a connecting rod swing assembly, the needle bar is arranged on the adapter in a penetrating mode, a machine needle is arranged at the bottom of the needle bar, and the needle bar driving mechanism is used for controlling the needle bar to move up and down. The guide ring is arranged on the adapter seat in a sleeving mode and can slide up and down, the connecting rod swing assembly is connected with the guide ring, a cycloid presser foot is arranged on the connecting rod swing assembly, and the connecting rod swing assembly can drive the cycloid presser foot to swing left and right on the machine needle when moving. According to the thread sewing machine head, the guide ring and the connecting rod swing assembly are ingeniously applied, the guide ring can achieve power transmission of swing driving and can also achieve the functions of turning, reversing and the like during thread swinging, the thread sewing machine head can achieve the rapid sewing effect that thread swinging and sewing are conducted at the same time, sewn threads are more uniform and firmer, and the sewing efficiency is improved. Cycloid can be performed according to a pattern set by the system.

The utility model relates to an automatic sewing and folding device for cotton yarn sewing production, which comprises two mounting racks, a conveying component is mounted on the mounting rack on the front side, an overturning component is also mounted on the mounting rack on the front side, a conveying belt component is mounted on the mounting rack on the rear side, and workbenches are connected to the left and right parts of the mounting rack on the rear side. The sewing assemblies are installed on the upper sides of the workbenches, the fixing frame is placed between the outer sides of the workbenches, and the two mechanical arm assemblies are slidably connected to the fixing frame. The negative pressure installation assembly and the adsorption disc are additionally arranged on the mechanical arm assembly, when the mechanical arm assembly grabs cotton yarn downwards, the negative pressure installation assembly exhausts air in the lower portion of the cotton yarn and air in the adsorption disc, and therefore the adsorption disc adsorbs the cotton yarn, and the mechanical arm assembly grabs the cotton yarn more stably; therefore, the situation that the mechanical arm assembly falls off in the cotton yarn grabbing process is avoided, and the overall cotton yarn production efficiency can be improved.

The utility model relates to the technical field of sewing equipment, and discloses a thread shifting mechanism which comprises a thread shifting connecting plate which is rotatably arranged on a machine frame through a pin shaft and connected with a power mechanism so that the power mechanism can drive the thread shifting connecting plate to rotate around the pin shaft relative to the machine frame. The connecting end of the shifting rod is rotatably connected with the thread shifting connecting plate, and the free end of the shifting rod is provided with a thread shifting rod assembly used for shifting a thread; and the sliding groove clamping jaw is arranged below the wire shifting connecting plate and is rotatably arranged on the rack, the shifting rod is installed in the sliding groove clamping jaw in a sliding mode, and the sliding groove clamping jaw is used for limiting the moving direction of the shifting rod. The thread shifting connecting plate, the shifting rod and the sliding groove clamping jaw form a crank sliding block mechanism, the sliding groove clamping jaw is arranged below the thread shifting connecting plate, the thread shifting mechanism shifts threads up and down, compared with existing left-right thread shifting, the movement track of the shifting rod is effectively restrained, the movement range of the shifting rod in the horizontal direction is reduced, the movement space needed by the thread shifting mechanism is further reduced, and the thread shifting mechanism is convenient to use. And the space utilization rate is improved.

The utility model relates to the technical field of sewing machines, in particular to a left thread hook assembly of a sewing machine, which comprises a fixed part and a left thread hook, the fixed part is fixed on a machine head of the sewing machine and positioned on one side of a needle of a take-up lever, and an elastic reset part on the fixed part is connected with the left thread hook. The left thread hook is arranged on the fixing piece in the mode that the left thread hook can transversely move towards one side of a thread clamping device of the take-up-lever, the left thread hook is provided with an upper guiding part, a lower guiding part and an elastic part, the upper guiding part and the lower guiding part are both used for an upper thread to penetrate through and guide the upper thread towards the needle hole direction, and the upper guiding part and the lower guiding part are flexibly connected from high to low. The lower guide part can be reset under the action of the elastic part; the utility model further discloses the sewing machine adopting the left thread hook assembly of the sewing machine. The left thread hook assembly can improve the tension of a thread channel, and after the tension of the thread channel is reduced, the sewing problems of thread breakage, stitch skipping and the like can be reduced.

The application relates to a synchronous thread hooking and feeding mechanism of a double-head sewing machine, which comprises a driving module for driving a transmission module, a transmission module for driving a thread hooking module and a feeding module to work, a thread hooking module for hooking threads on materials, and a feeding module for assisting material movement, the driving module is in transmission connection with the transmission module, the thread hooking module and the feeding module are respectively in transmission connection with the transmission module, wherein the driving module drives the transmission module to work, thereby driving the thread hooking module to hook threads on materials and driving the feeding module to move the materials, and the double head can realize synchronous working thread hooking and feeding functions.

The utility model discloses a sewing device which is used for sewing a first cutting piece needing to be flanged to a second cutting piece. The device comprises a workbench, a sewing template and a sewing machine, and the workbench can generate airflow; the sewing template is arranged on the workbench and can make the first cutting piece upwarp so that the first cutting piece can be grabbed and folded to form a turnover part. The sewing template is further provided with a turning plate, and the turning plate is suitable for pressing the folding part. The sewing template is further provided with a cover plate, the cover plate is rotationally connected with the bottom plate and used for pressing a second cutting piece located between the turning plate and the cover plate, the cover plate is provided with a sewing groove, and the sewing groove right faces the portion, not covered by the turning plate, of the through hole. The sewing machine sews the first cutting piece needing to be flanged to the second cutting piece along the sewing groove, the sewing device can help an operator to accurately and rapidly perform flanging, and the production efficiency and the processing quality are greatly improved.

The invention relates to the technical field of linear sewing machines, and discloses an efficient linear sewing machine which comprises a fabric thread frame and further comprises a discharging device and a collecting device, an upper thread is arranged at the bottom of the fabric thread frame, an upper thread clamp is arranged on one side of the upper thread, a thread breakage detection box is arranged on one side of the upper thread clamp, and a thread breakage detection device is arranged on the other side of the upper thread clamp. A correlation switch is arranged on one side of the broken line detection box, a display screen is arranged on one side of the correlation switch, a presser foot air cylinder is arranged on one side of the display screen, a needle plate is arranged at the bottom of the presser foot air cylinder, a machine needle is arranged at the bottom of the needle plate, a presser foot is arranged at the bottom of the machine needle, and a line passing plate is arranged on one side of the presser foot air cylinder. By arranging the main assembling area, 65 needles can be installed and sewn at the same time, the maximum sewing range is 0-406 mm, mattress foxing strips of 0-500 mm can be produced, the use requirement of a user can be met, two servo motors are used for driving, enough power is provided for driving, and high-speed production sewing can be conducted.

The utility model discloses a thread sweeping mechanism of a sewing machine, which relates to the technical field of sewing machines, and the sewing machine comprises a machine head, a presser foot and a machine needle, a thread sweeping mechanism is further arranged in the machine head and comprises a driving air cylinder, a gear and rack assembly and a thread sweeping roller which are connected in sequence; the driving air cylinder drives the thread sweeping roller to rotate in a reciprocating mode through the gear and rack assembly, and therefore the thread sweeping roller sweeps the gap between the presser foot and the machine needle. According to the utility model, the driving cylinder drives the line sweeping roller to rotate in a reciprocating manner, so that the line sweeping action is more stable and efficient, and compared with the prior art, the energy consumption is lower, the structure is simpler and the maintenance is not needed.

[Problem] To facilitate the ability to maintain proper thread tension of an upper thread in a sewing method that uses a sewing machine. [Solution] Provided is a sewing method that uses a sewing machine 10 comprising an upper-thread tensioning device 11, a thread hook 12 for changing the direction of an upper thread T passed through the upper-thread tensioning device 11, and a thread take-up lever 13 that can carry out an operation of pulling up the upper thread T in a state in which the upper thread T has passed through the thread hook 12. For the sewing machine 10, a sewing machine is used that further comprises an upper-thread guide member 100 having a first guide part 120 for reversing the direction of the upper thread T passed through the thread hook 12 and directing the upper thread T once again to the thread hook 12. The upper thread T that has passed through the thread hook 12 is hooked to the first guide part 120 and subjected to a reversal of direction, then hooked once again to the thread hook 12 before being passed through the thread take-up lever 13, and then sewing is carried out with the upper thread T in a state of being passed through the thread take-up lever 13.