A sewing machine

Abstract

The present invention provides a sewing machine, which belongs to the technical field of sewing equipment. It solves the problems of poor sewing quality and low efficiency of existing sewing machines. The sewing machine includes a frame and a sewing head. A cloth positioning mechanism capable of clamping and positioning cloth or loosening cloth is arranged on the table. More than three cloth positioning mechanisms are arranged circumferentially. A rotating drive mechanism capable of driving the table to rotate circumferentially is arranged on the frame. The sewing head can move along a certain track on the frame and sew cloth on the cloth positioning mechanism opposite to it. This structure significantly improves the braking effect of the monorail conveyor. This structure improves the quality of sewing collars by the sewing machine while improving the sewing efficiency of collars.

Description

Technical Field

[0001] The invention belongs to the technical field of sewing equipment, in particular to a sewing machine. Background Art

[0002] In the shirt manufacturing industry, shirts are composed of a main piece, a collar, cuffs and other shirt accessories. The collar and cuffs are important accessories of the shirt. The collar and cuffs are sewn separately by sewing machines, and then the collar and cuffs are sewn to the main piece. Finally, they are ironed and shaped to form a complete shirt.

[0003] At present, the China Patent Network discloses a sewing device and method for processing collars / cuffs [Application Publication No.: 109594206A], comprising a frame and an operating table mounted on the frame, the operating table having a feeding area, an interaction area and a receiving area, the sewing device comprising a receiving structure, a positioning indicating device, a sewing device, an automatic cloth cutting device and a pushing device, the positioning indicating device is used to indicate the positioning of the cloth feeding device, the sewing device is used to sew the cloth and is located between the feeding area and the interaction area, the automatic cloth cutting device is used to push the cloth The interactive feeding device is used for cutting and is located between the material receiving area and the interactive area. The material pushing device is used for pushing the cloth to the material receiving device and is located above the material receiving area. The material receiving device is used for collecting the cloth and is located at the side of the material receiving area. It also includes an interactive feeding device with a right feeding mechanism and a left feeding mechanism. The interactive feeding device is used to drive the right feeding mechanism to press and move the cloth located in the loading area to the sewing equipment for sewing, and then continue to move it to the interactive area; drive the left feeding mechanism to exchange the cloth on the right feeding mechanism in the interactive area and press and transfer it to the automatic cloth cutting device for cutting, and then continue to move it to the material receiving area.

[0004] During the working process of the above-mentioned sewing equipment, first, after the worker places the cloth on the loading area, the right feeding mechanism presses the cloth on the operating table, and then drags the cloth to the sewing equipment. Since the sewing equipment is fixed, the right feeding mechanism drives the cloth to move along a certain trajectory on the operating table, so that the sewing equipment can sew the cloth. Since the collar and cuffs of a shirt are generally made by overlapping two or more layers of cloth, the friction coefficient between the cloths is very small. When moving more than two layers of cloth on the operating table, the cloths are prone to slip, wrinkle or shift, making it impossible for the sewing machine to complete the sewing of the collar and cuffs. Secondly, when the cloth is sewn, the right feeding mechanism releases the cloth and moves to the right to reset, and the left feeding mechanism releases the cloth and moves to the right to reset, and the left feeding mechanism stops. The mechanism drags the sewn cloth to the automatic cloth cutting device. During the process of the right feeding mechanism moving back, the sewing equipment does not work, so that the sewing of the cloth is not continuous, which reduces the sewing efficiency of the sewing equipment; in addition, the above-mentioned sewing equipment is composed of many devices. Since each device implements different functions, the structure of each device is different, and the structure of each device is relatively complex, which makes the whole device large in size and has many parts. The structure of the whole sewing device is complex and troublesome to assemble. It takes more manpower and material resources during assembly, which makes the manufacturing cost of the equipment expensive. In addition, the interactive feeding method makes the coordination of the actions between the devices very complicated, which further increases the difficulty of sewing equipment and makes it extremely difficult to repair it later. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems in the prior art and to propose a sewing machine. The technical problem to be solved by the present invention is: how to improve the sewing quality of the neckline while improving the sewing efficiency of the neckline.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A sewing machine comprises a frame and a sewing machine head arranged on one side of the frame, characterized in that the sewing machine also comprises a table, the table is provided with a cloth positioning mechanism capable of clamping and positioning cloth or loosening cloth, the cloth positioning mechanism has more than three, and the more than three cloth positioning mechanisms are arranged circumferentially, the frame is provided with a rotating drive mechanism capable of driving the table to rotate circumferentially, and the sewing machine head can move along a certain track on the frame and sew cloth on the cloth positioning mechanism opposite to it.

[0008] The working principle of this sewing machine: the fabric is loaded manually, and the worker stands on one side of the frame opposite to one of the fabric positioning mechanisms. When the vacant fabric positioning mechanism rotates to be opposite to the worker, the worker places the fabric on the fabric positioning mechanism, and the fabric positioning mechanism clamps the fabric and positions it. After the loading of the fabric positioning mechanism is completed, the rotary drive mechanism drives the table to rotate a certain angle, so that the fabric positioning mechanism holding the fabric rotates to be opposite to the sewing machine head. At this time, the sewing machine head moves along a certain trajectory on the frame to sew the fabric into shape. After the fabric is sewn into shape, the rotary drive mechanism drives the table to rotate a certain angle, so that the sewn fabric moves out of the sewing machine head. Since the sewing machine has more than three cloth positioning mechanisms, cloth loading and sewing can be carried out simultaneously, realizing continuous loading and sewing, ensuring that the sewing machine head is basically in a continuous sewing state, and significantly improving the efficiency of the sewing machine in sewing collars or cuffs; and after more than two layers of cloth are clamped and positioned by the cloth positioning mechanism, the cloth is fed by rotating the table, so that the cloth will not move in the process of transfer. When the cloth is transferred to the sewing machine head, during the sewing process, the cloth is clamped and positioned by the cloth positioning mechanism and does not move in a fixed position, and the sewing machine head moves along a certain trajectory, thus avoiding slipping, wrinkling or shifting between the cloths, so that the collar and cuffs can be sewn into shape, thereby improving the sewing quality of the product. In addition, the sewing machine is mainly composed of a machine head, a fabric positioning mechanism and a driving mechanism, which reduces the number of devices. Compared with the interactive feeding in the prior art, the rotary feeding is simpler in action, thereby making the sewing machine simple in structure, compact in size, and easy to assemble, thereby reducing the manufacturing cost of the sewing machine and improving the convenience of subsequent maintenance.

[0009] In the above-mentioned sewing machine, the fabric positioning mechanism includes a lower template fixed on the table, an upper template rotatably arranged on the table, and a driving component for driving the upper template to flip, and the upper template can flip downward to cooperate with the lower template to clamp the fabric.

[0010] Through the arrangement of this structure, the driving component can drive the upper template to flip up and down. When the driving component drives the upper template to flip upward, the upper template and the lower template are in an open state, and the cloth can be placed on the lower template or the sewn cloth can be taken off the lower template. When the cloth is placed on the lower template, the driving component drives the upper template to flip downward, so that the upper template and the lower template are molded together. The upper template and the lower template press the cloth into position, and the cloth is firmly positioned and not easy to loosen.

[0011] In the above-mentioned sewing machine, the cloth positioning mechanism further comprises a rotating block rotatably arranged on the table, the driving assembly drives the rotating block to flip, and the upper template is detachably connected to the rotating block.

[0012] Through the setting of this structure, the sizes of collars and cuffs of shirts of the same size are different, and a pair of upper templates and lower templates can only clamp and position one type of collar or cuff. Therefore, when the sewing machine is processing and manufacturing collars or cuffs, the upper template and the lower template need to be replaced frequently. This structure facilitates the disassembly and replacement of the upper template.

[0013] In the above-mentioned sewing machine, a mounting strip arranged in the transverse direction is fixed to the inner end of the upper template, a plug plate is fixed on the mounting strip, the cloth positioning mechanism includes a rotating block rotatably arranged on the mounting plate, a slot is provided on one end face of the rotating block, the plug plate is plug-connected to the slot, a plug plate positioning cylinder is fixed to the upper surface of the rotating block, and the piston rod of the plug plate positioning cylinder extends to the slot and abuts against the plug plate.

[0014] Through the arrangement of this structure, when the upper template needs to be replaced, the piston rod of the plug plate positioning cylinder contracts so that the piston rod no longer rests on the plug plate. At this time, the upper template can be moved longitudinally to pull the plug plate out of the slot, and the plug plate on the upper template to be installed is inserted into the slot, and the piston rod of the plug plate positioning cylinder extends outward so that the piston rod rests on the plug plate, and the plug plate is positioned in the slot, that is, the upper template is positioned on the rotating block. The replacement of the upper template is simple and fast, which significantly improves the convenience of replacing the upper template.

[0015] In the above-mentioned sewing machine, a pair of shaft seats and a rotating shaft rotatably arranged on the two shaft seats are fixed on the upper surface of the table, the rotating block is fixed on the rotating shaft, and the driving assembly includes a cylinder 1, an articulated seat 1 and an articulated seat 2, the articulated seat 1 is fixed on the upper surface of the rotating block, the articulated seat 2 is fixed on the upper surface of the table, the piston rod of the cylinder 1 is hinged to the articulated seat 1, and the tail of the cylinder 1 is hinged to the articulated seat 2.

[0016] Through the arrangement of this structure, when the piston rod of cylinder one contracts, the rotating block is driven to rotate upward through the hinge seat one, thereby driving the upper template to flip upward, so that the upper template and the lower template are in an open state; when the piston rod of cylinder one extends outward, the rotating block rotates downward, thereby driving the upper template to flip downward, so that the upper template and the lower template are molded together to press and position the cloth.

[0017] In the above-mentioned sewing machine, a solenoid valve for controlling the on-off of the air circuit of cylinder one is fixed on the table, a switch that can be electrically connected to the solenoid valve is fixed on the lower surface of the table, and the switch has an elastic contact that can float up and down. Cylinder three is fixed on the frame below the switch, and a power contact is connected to the piston rod of cylinder three. The power contact corresponds to the elastic contact one by one and can abut against each other.

[0018] Through the arrangement of this structure, the power contact can be connected to electricity through a wire, and the cloth positioning mechanism needs to open the upper template during loading and unloading. At this time, the piston rod of cylinder three extends upward, so that the power contact is abutted against the elastic contact, and the elastic contact is pushed upward to move the elastic contact upward, thereby realizing electrical connection between the elastic contact and the solenoid valve. At this time, the solenoid valve is energized, and the solenoid valve controls the air circuit to open. The piston rod of cylinder one moves and drives the upper template to flip upward to open the mold. When loading or unloading is completed, the piston rod of cylinder three contracts, the power contact is separated from the elastic contact, and the elastic contact moves downward to reset, thereby realizing disconnection between the elastic contact and the solenoid valve, the solenoid valve is powered off, and the piston rod of cylinder one moves and drives the upper template to flip downward to close the mold. By adopting the design of this structure, the solenoid valve is always in a power-off state during the process of the table rotating and feeding, ensuring that the upper template and the lower template press the fabric tightly. The traditional method generally adopts the solenoid valve to directly connect to the external power supply through the power cord, so that the power cord is easy to get tangled in the process of the table rotating and feeding. The present structure avoids the solenoid valve being directly connected to the external power supply through the power cord, so that the on-off control of the air circuit by the solenoid valve does not interfere with the rotation of the table, thereby improving the safety of the sewing machine.

[0019] In the above-mentioned sewing machine, three or more mounting plates are arranged on the table along its circumference, the mounting plates correspond one-to-one to the cloth positioning mechanisms, and the rotating block and the lower template are both arranged on the corresponding mounting plates.

[0020] Through the arrangement of this structure, the upper template is arranged on the mounting plate through the rotating block, and the lower template is arranged on the mounting plate, so that the entire cloth positioning mechanism is arranged on the mounting plate, which facilitates the disassembly, assembly and replacement of the cloth positioning mechanism on the table.

[0021] In the above-mentioned sewing machine, a step is provided on the upper surface of the outer end of the mounting plate, a recess is provided on the step, one end of the lower template has a convex portion embedded in the recess, the lower surface of one end of the lower template is abutted against the horizontal surface of the step, the end surface of one end of the lower template is abutted against the vertical surface of the step, and one end of the lower template is connected to the step by a fastener.

[0022] Through the arrangement of this structure, when the lower template is installed, first the lower surface of one end of the lower template is abutted against the horizontal surface of the step, and then the end surface of one end of the lower template is abutted against the vertical surface of the step. After the convex portion is embedded in the concave portion, the matching structure of the convex portion and the concave portion laterally limits the lower template. This structure enables the lower template to be accurately and quickly positioned on the mounting plate, and enables the lower template and the upper template to be precisely molded together. When the molds are molded together, the lower template and the upper template just overlap each other, thereby preventing the steel needle of the sewing machine head from poking the lower template or the upper template during sewing.

[0023] In the above-mentioned sewing machine, the fastener passes through the lower template and the step in sequence from top to bottom, and a clearance hole corresponding to the fastener is opened on the upper template. When the upper template and the lower template are molded together, the head of the fastener is located in the clearance hole.

[0024] Through the arrangement of the present structure, the fastener passes through the lower template and the step from top to bottom in sequence. When the upper template is disassembled, the fastener can be loosened by a tool and pulled out upward. After the fastener is removed, the lower template is removed from the rotating block. The replacement of the lower template is simple and fast. When the upper template and the lower template are molded together, the head of the fastener is located in the make way hole, which facilitates the disassembly and assembly of the lower template without interfering with the mold assembly of the upper template and the lower template.

[0025] In the above-mentioned sewing machine, a negative pressure adsorption component is arranged on the frame below one of the cloth positioning mechanisms, and the negative pressure adsorption component includes a base fixed on the frame, a suction block arranged on the base along the vertical sliding, and a cylinder fixed on the base for driving the suction block to move vertically. An air cavity is opened on the upper surface of the suction block, and air holes are opened on the bottom surface of the air cavity. A plurality of through holes are opened on the lower template corresponding to the suction block.

[0026] Through the arrangement of this structure, when the upper template and the lower template are in the open state, the cloth can be placed on the upper surface of the lower template. At this time, the second cylinder drives the suction block to move upward so that the upper surface of the suction block is in close contact with the lower surface of the lower template. Several through holes are connected to the air cavity, and the air holes are connected to the exhaust device to form a negative pressure in the air cavity, so that the cloth is closely fitted to the lower template, avoiding displacement of the cloth when the upper template and the lower template are closed, thereby improving the accuracy of cloth positioning.

[0027] In the above-mentioned sewing machine, the rotary drive mechanism includes a rotary table fixed on the frame, the table plate is connected to the rotary table, and the table plate rotates synchronously with the rotary table. Through the arrangement of this structure, the rotary table drives the table plate to rotate, thereby driving the cloth positioning mechanism on the table plate to transfer the cloth.

[0028] In the above-mentioned sewing machine, the sewing machine also includes a guide rail 1 arranged on one side of the frame, the guide rail 1 is arranged in the horizontal direction, a sliding seat is slidably arranged on the guide rail 1, a screw nut mechanism 1 for driving the sliding seat to slide in the horizontal direction is arranged on the frame, and a motor 1 for driving the screw nut mechanism 1 to work is arranged on the frame; a guide rail 2 is arranged on the sliding seat, the guide rail 2 is arranged in the longitudinal direction, and the guide rail 2 is slidably arranged on the slider, the sewing machine head is fixed on the slider, the sliding seat is provided with a screw nut mechanism 2 for driving the sewing machine head to slide in the longitudinal direction, and the sliding seat is provided with a motor 2 for driving the screw nut mechanism 2 to work.

[0029] Through the arrangement of this structure, motor one drives the screw in screw nut mechanism one to rotate, thereby driving the sliding seat to move horizontally, and the sliding seat drives the sewing machine head to move horizontally. Motor two drives the screw in screw nut mechanism two to rotate, thereby driving the sewing machine head to move longitudinally. Motor one and motor two work simultaneously so that the sewing machine head can move along a certain trajectory to achieve sewing of fabrics.

[0030] Compared with the prior art, the sewing machine of the present invention has the following advantages:

[0031] 1. Since the sewing machine has more than three fabric positioning mechanisms, the feeding and sewing of fabric can be carried out simultaneously, realizing continuous feeding and sewing, and significantly improving the efficiency of sewing collars or cuffs.

[0032] 2. In this structure, when more than two layers of fabric are clamped and positioned by the fabric positioning mechanism, the fabric is fed by rotating the table, so that the fabric will not move during the transfer process. When the fabric is transferred to the sewing machine head, during the sewing process, the fabric is clamped and positioned by the fabric positioning mechanism and remains in a fixed position, and the sewing machine head moves along a certain trajectory, thus avoiding slipping, wrinkling or shifting between the fabrics, allowing the collar and cuffs to be sewn into shape, thereby improving the sewing quality of the product.

[0033] 3. The sewing machine is mainly composed of a machine head, a fabric positioning mechanism and a driving mechanism, which reduces the number of devices and thus reduces the manufacturing cost of the sewing machine. Compared with the interactive feeding in the prior art, the rotary feeding is simpler in action, which makes the sewing machine simple in structure, compact in size, and easy to assemble, while also improving the convenience of later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is one of the three-dimensional structural schematic diagrams of the present invention.

[0035] Figure 2 It is a top view of the present invention.

[0036] Figure 3 This is the second schematic diagram of the three-dimensional structure of the present invention.

[0037] Figure 4 It is a three-dimensional structural schematic diagram of the table and the cloth positioning mechanism of the present invention.

[0038] Figure 5 It is a schematic diagram of the exploded structure of the cloth positioning mechanism of the present invention.

[0039] Figure 6 It is a schematic cross-sectional structure diagram of the cloth positioning mechanism of the present invention.

[0040] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure of part A in the middle.

[0041] Figure 8 It is a schematic diagram of the exploded structure of the lower template and the mounting plate of the present invention.

[0042] Fig. 9 It is the third schematic diagram of the three-dimensional structure of the present invention.

[0043] Fig.10 yes Fig. 9 Schematic diagram of the enlarged structure of part A in the middle.

[0044] Fig.11 It is the fourth schematic diagram of the three-dimensional structure of the present invention.

[0045] Fig.12 It is the fifth schematic diagram of the three-dimensional structure of the present invention.

[0046] Fig.13 yes Fig.12 Schematic diagram of the enlarged structure of part A in the middle.

[0047] Fig.14 It is a structural schematic diagram of the upper template and the lower template of the present invention.

[0048] In the figure, 1, frame; 2, sewing machine head; 3, table; 4, cloth positioning mechanism; 40, rotating shaft; 41, mounting plate; 41a, step; 41a1, recess; 42, lower template; 42a, convex part; 42b, through hole; 43, upper template; 43a, clearance hole; 44, driving assembly; 441, cylinder 1; 442, hinge seat 1; 443, hinge seat 2; 45, mounting strip; 46, plug plate; 461, countersunk hole; 47, Rotating block; 48, plug-in plate positioning cylinder; 49, shaft seat; 5, rotation drive mechanism; 51, rotating table; 6, slot; 7, fastener; 8, negative pressure adsorption component; 81, base; 82, suction block; 82a, air cavity; 82b, air hole; 83, cylinder two; 9, guide rail one; 10, sliding seat; 11, screw nut mechanism one; 12, motor one; 13, guide rail two; 14, slider; 15, screw nut mechanism two; 16, motor two. DETAILED DESCRIPTION

[0049] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0050] Example 1

[0051] like Figure 1 and Fig.11As shown, the sewing machine comprises a frame 1 and a sewing machine head 2 arranged on one side of the frame 1, the sewing machine also comprises a guide rail 9 arranged on one side of the frame 1, the guide rail 9 is arranged in the horizontal direction, a sliding seat 10 is slidably arranged on the guide rail 9, a screw nut mechanism 11 for driving the sliding seat 10 to slide in the horizontal direction is arranged on the frame 1, and a motor 12 for driving the screw nut mechanism 11 to work is arranged on the frame 1; a guide rail 2 13 is arranged on the sliding seat 10, the guide rail 2 13 is arranged in the longitudinal direction, a slider 14 is slidably arranged on the guide rail 2 13, the sewing machine head 2 is fixed on the slider 14, a screw nut mechanism 2 15 for driving the sewing machine head 2 to slide in the longitudinal direction is arranged on the sliding seat 10, and a motor 12 for driving the screw nut mechanism 11 to work is arranged on the sliding seat 10. The motor 12 drives the screw in the screw nut mechanism 11 to rotate, thereby driving the sliding seat 10 to move in the lateral direction. The sliding seat 10 drives the sewing machine head 2 to move in the lateral direction. The motor 16 drives the screw in the screw nut mechanism 15 to rotate, thereby driving the sewing machine head 2 to move in the longitudinal direction. The motor 15 and the motor 2 16 work simultaneously so that the sewing machine head 2 can move along a certain trajectory. The motor 15 and the motor 2 16 are servo motors. The motor 15 and the motor 2 16 are controlled to work by a computer design program. The output of the motor 15 and the motor 2 16 is converted into a linear motion or a curved motion of the sewing machine head 2, so that the sewing machine head 2 can move along a certain trajectory according to the shape of the cloth, thereby realizing the sewing of the cloth.

[0052] like Figure 1 , Figure 2 and Figure 3As shown, the sewing machine also includes a table 3, on which a cloth positioning mechanism 4 capable of clamping and positioning cloth or loosening cloth is arranged, there are more than three cloth positioning mechanisms 4, and the more than three cloth positioning mechanisms 4 are arranged in the circumferential direction, and the frame 1 is provided with a rotating drive mechanism 5 capable of driving the table 3 to rotate in the circumferential direction, and the rotating drive mechanism 5 includes a rotating table 51 fixed on the frame 1, and the table 3 is connected to the rotating table 51, and the table 3 rotates synchronously with the rotating table 51. In this embodiment, there are four cloth positioning mechanisms 4, and the four cloth positioning mechanisms 4 are distributed in a cross shape, and the sewing machine head 2 is located opposite to one of the cloth positioning mechanisms 4. When in use, the worker stands on one side of the frame 1 opposite to the second cloth positioning mechanism 4, and an automatic cutting device is arranged on the outer side of the frame 1, and the automatic cutting device is opposite to the third cloth positioning mechanism 4, and a material taking mechanism is arranged on the outer side of the frame 1, and the material taking mechanism is opposite to the fourth cloth positioning mechanism 4, and the automatic cutting device is located on the opposite side of the worker, and the material taking mechanism is located on the opposite side of the sewing machine head 2. The worker places the cloth on a cloth positioning mechanism 4 opposite to it, and the rotary drive mechanism 5 drives the table 3 to rotate so that the cloth positioning mechanism 4 is transferred to the side of the sewing machine head 2, and the sewing machine head 2 moves along a certain trajectory to sew the cloth into shape. When the cloth is sewn and formed, the rotary drive mechanism 5 drives the table 3 to rotate so that the cloth positioning mechanism 4 is transferred to the side of the automatic cutting device, and the automatic cutting device cuts the sewn and formed cloth. After cutting, the rotary drive mechanism 5 drives the table 3 to rotate so that the cloth positioning mechanism 4 is transferred to the side of the material taking mechanism, and the material taking mechanism takes the processed cloth from the cloth positioning mechanism 4.

[0053] like Figure 4 and Figure 5As shown, the cloth positioning mechanism 4 includes a mounting plate 41 fixed on the table 3, a lower template 42 fixed on the mounting plate 41, an upper template 43 rotatably set on the mounting plate 41 and a driving component 44 for driving the upper template 43 to flip up and down. The mounting plate 41 can also be integrally formed with the table 3. The cloth positioning mechanism 4 includes a rotating block 47 rotatably set on the mounting plate 41, a pair of shaft seats 49 and a rotating shaft 40 rotatably set on the two shaft seats 49 are fixed on the upper surface of the mounting plate 41, the rotating block 47 is fixed on the rotating shaft 40, the driving component 44 includes a cylinder 1 441, an articulated seat 1 442 and an articulated seat 2 443, the articulated seat 1 442 is fixed on the upper surface of the rotating block 47, the articulated seat 2 443 is fixed on the upper surface of the table 3, the piston rod of the cylinder 1 441 is hinged to the articulated seat 1 442, the tail of the cylinder 1 441 is hinged to the articulated seat 2 443, and the upper template 43 is fixedly connected to the rotating block 47. When the piston rod of the cylinder 441 contracts, the rotating block 47 is driven to rotate upward through the hinge seat 442, and then the upper template 43 is driven to flip upward, so that the upper template 43 and the lower template 42 are in an open state. At this time, the cloth can be manually placed on the lower template 42, or the sewn cloth can be taken off the lower template 42; when the piston rod of the cylinder 441 extends outward, the rotating block 47 rotates downward, and then the upper template 43 is driven to flip downward, so that the upper template 43 and the lower template 42 are molded and pressed to position the cloth. During the operation of the sewing machine, the four steps of loading, sewing, cutting and unloading can be carried out simultaneously, and the turntable feeding method is adopted to greatly improve the feeding efficiency of the cloth, so that the sewing efficiency of the sewing machine is significantly improved.

[0054] like Figures 4 to 7 As shown, a mounting strip 45 arranged in a transverse direction is fixed to the upper surface of the inner end of the upper template 43, and a plug plate 46 is fixed on the mounting strip 45. A slot 6 is provided on one end surface of the rotating block 47, and the plug plate 46 is plugged and connected with the slot 6. A plug plate positioning cylinder 48 is fixed to the upper surface of the rotating block 47, and the piston rod of the plug plate positioning cylinder 48 extends into the slot 6 and abuts against the plug plate 46. When the upper template 43 needs to be replaced, the piston rod of the plug plate positioning cylinder 48 contracts so that the piston rod no longer abuts against the plug plate 46. At this time, the upper template 43 can be moved longitudinally so that the plug plate 46 is pulled out of the slot 6, and the plug plate 46 on the upper template 43 to be installed is inserted into the slot 6, and the piston rod of the plug plate positioning cylinder 48 extends outward so that the piston rod abuts against the plug plate 46, and the plug plate 46 is positioned in the slot 6, that is, the upper template 43 is positioned on the rotating block 47. The replacement of the upper template 43 is simple and fast, which significantly improves the convenience of replacing the upper template 43. A countersunk hole 461 is formed on the insert plate 46 , and the lower end of the piston rod of the insert plate positioning cylinder 48 abuts against the hole wall of the countersunk hole 461 , further improving the positioning effect of the insert plate 46 in the slot 6 .

[0055] like Figure 8As shown, a step 41a is provided on the upper surface of the outer end of the mounting plate 41, a recess 41a1 is provided on the step 41a, one end of the lower template 42 has a convex portion 42a embedded in the recess 41a1, the lower surface of one end of the lower template 42 is in contact with the horizontal surface of the step 41a, the end surface of one end of the lower template 42 is in contact with the vertical surface of the step 41a, one end of the lower template 42 is connected to the step 41a by a fastener 7, and the fastener 7 passes through the lower template 42 and the step from top to bottom in sequence, and a clearance hole 43a corresponding to the fastener 7 is provided on the upper template 43, and when the upper template 43 and the lower template 42 are molded together, the head of the fastener 7 is located in the clearance hole 43a. When replacing a pair of upper templates 43 and lower templates 42, first remove the upper template 43, then loosen the fastener 7 with a tool, and pull the fastener 7 upward. After the fastener 7 is removed, remove the lower template 42 from the rotating block 47. The replacement of the lower template 42 is simple and fast, and when the upper template 43 and the lower template 42 are molded together, the head of the fastener 7 is located in the makeshift hole 43a, which facilitates the disassembly and assembly of the lower template 43 without interfering with the mold assembly of the upper template 43 and the lower template 42.

[0056] In addition, the plug-in structure between the upper template 43 and the rotating block 47 can achieve precise positioning of the upper template 43 during installation, and the installation structure of the lower template 42 can also achieve precise positioning of the lower template 42 on the mounting plate 41, so that the lower template 42 and the upper template 43 can be completely aligned when the mold is closed, avoiding the steel needle of the sewing machine head from poking the lower template 42 or the upper template 43 during the sewing process.

[0057] like Figure 4 , Fig.12 and Fig.13As shown, a solenoid valve 20 for controlling the on-off of the gas circuit of the cylinder 1 441 is fixed on each mounting plate 41, a switch 17 which can be electrically connected to the solenoid valve 20 is fixed on the lower surface of the mounting plate 41, the switch 17 has an elastic contact 171 which can float up and down, a cylinder 3 18 is fixed on the frame 1 below the switch 17, a power contact 19 is connected to the piston rod of the cylinder 3 18, the power contact 19 corresponds to the elastic contact 171 one by one and can abut against each other, and in this embodiment, the cylinder 3 18 is only provided at the loading station and the unloading station. The power contact 19 can be connected to electricity through a wire. The cloth positioning mechanism 4 needs to open the upper template 43 when loading and unloading. At this time, the piston rod of the cylinder three 18 extends upward, so that the power contact 19 is abutted against the elastic contact 171, and the elastic contact 171 is pushed upward to move the elastic contact 171 upward, so that the elastic contact 171 is electrically connected to the solenoid valve 20. At this time, the solenoid valve 20 is energized, and the solenoid valve 20 controls the air circuit to open. The piston rod of the cylinder one 441 moves and drives the upper template 43 to flip upward to open the mold. When loading or unloading is completed, the piston rod of the cylinder three 18 contracts, the power contact 19 is separated from the elastic contact 171, and the elastic contact 171 moves downward to reset, so that the elastic contact 171 is disconnected from the solenoid valve 20, the solenoid valve 20 is powered off, and the piston rod of the cylinder one 441 moves and drives the upper template 43 to flip downward to close the mold.

[0058] like Fig. 9 and Fig.10 As shown, a negative pressure adsorption assembly 8 is arranged on the frame 1 below one of the cloth positioning mechanisms 4, and the negative pressure adsorption assembly 8 includes a base 81 fixed on the frame 1, a suction block 82 vertically slidably arranged on the base 81, and a cylinder 83 fixed on the base 81 for driving the suction block 82 to move vertically, an air cavity 82a is provided on the upper surface of the suction block 82, and air holes 82b are provided on the bottom surface of the air cavity 82a, and a plurality of through holes 42c are provided at the lower template 42 corresponding to the suction block 82. When the upper template 43 and the lower template 42 are in the open state, the cloth can be placed on the upper surface of the lower template 42. At this time, the cylinder 83 drives the suction block 82 to move upward so that the upper surface of the suction block 82 is in close contact with the lower surface of the lower template 42. Several through holes 42b are connected to the air cavity 82a. The air holes 82b are connected to the exhaust device to form a negative pressure in the air cavity 82a, so that the cloth is closely attached to the lower template 42, avoiding the displacement of the cloth when the upper template 43 and the lower template 42 are closed, thereby improving the accuracy of cloth positioning.

[0059] This sewing machine is not only used for sewing collars and cuffs, but also can be used for sewing pocket covers and other clothing accessories similar to collars or cuffs.

[0060] Example 2

[0061] The contents of this embodiment are basically the same as those of the above-mentioned embodiment 1, except that the cloth positioning mechanism 4 includes a mounting plate, an upper template and a lower template, the lower template is fixed on the mounting plate, and the upper template is driven by a cylinder to vertically lift and lower the upper template, thereby realizing the opening or closing of the upper template and the lower template.

[0062] Example 3

[0063] The contents of this embodiment are basically the same as those of the above-mentioned embodiment 1, with the difference being that the rotary drive mechanism 5 is a table plate 3 which is arranged on the frame through the rotation of the main shaft, an output gear is mounted on the main shaft, and the motor drives the output gear to rotate through a reduction gear set, thereby driving the main shaft to rotate, thereby realizing the rotation of the table plate 3.

[0064] Example 4

[0065] like Fig.14 As shown, the contents of this embodiment are basically the same as those of the above-mentioned embodiment 1, except that: the lower template 42 includes a left plate body 421 and a right plate body 422, and the left plate body 421 and the right plate body 422 can move away from and approach each other to achieve template length adjustment, so that the lower template 42 can adjust its own length according to the length of the cloth, which is suitable for pressing and fixing cloths of different lengths, avoiding the disassembly and replacement of the lower template 42 on the machine, and only the upper template 43 needs to be replaced. The replacement of the upper template 43 is simple and fast, so that the entire machine can be quickly adapted to the sewing of cloths of various lengths.

[0066] Example 5

[0067] The contents of this embodiment are basically the same as those of the above-mentioned embodiment 1, except that the upper mold plate 43 is connected to the rotating block 47 by fasteners.

[0068] Example 6

[0069] The content of this embodiment is basically the same as that of the above-mentioned embodiment 1, except that the template 43 and the rotating block 47 are positioned by magnet adsorption.

[0070] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A sewing machine, comprising a frame (1) and a sewing head (2) arranged on one side of the frame (1), characterized in that: The sewing machine further comprises a table (3), on which a cloth positioning mechanism (4) capable of clamping and positioning cloth or loosening cloth is arranged, the cloth positioning mechanism (4) comprises three or more cloth positioning mechanisms (4), which are arranged along the circumference of the table (3), the frame (1) is provided with a rotary drive mechanism (5) capable of driving the table (3) to rotate in the circumference, the sewing machine head (2) is capable of moving along a certain track on the frame (1) and sewing cloth on the cloth positioning mechanism (4) opposite thereto; the cloth positioning mechanism (4) comprises a lower template (42) fixed on the table (3), an upper template (43) rotatably arranged on the table (3), and a drive assembly (44) for driving the upper template (43) to flip, the upper template (43) being capable of flipping downward to cooperate with the lower template (42) to clamp the cloth; The cloth positioning mechanism (4) also includes a rotating block (47) rotatably arranged on the table (3), the driving assembly (44) drives the rotating block (47) to flip, and the upper template (43) is detachably connected to the rotating block (47); a mounting strip (45) arranged in a transverse direction is fixed to the inner end of the upper template (43), a plug plate (46) is fixed to the mounting strip (45), a slot (6) is provided on one end surface of the rotating block (47), the plug plate (46) is plug-connected to the slot (6), and a plug plate positioning cylinder (48) is fixed to the upper surface of the rotating block (47), and the piston rod of the plug plate positioning cylinder (48) extends into the slot (6) and abuts against the plug plate (46); A negative pressure adsorption assembly (8) is provided below one of the cloth positioning mechanisms (4) and is arranged on the frame (1). The negative pressure adsorption assembly (8) comprises a base (81) fixed on the frame (1), a suction block (82) vertically slidably arranged on the base (81), and a second cylinder (83) fixed on the base (81) and used for driving the suction block (82) to move vertically. An air cavity (82a) is provided on the upper surface of the suction block (82), and air holes (82b) are provided on the bottom surface of the air cavity (82a). A plurality of through holes (42b) are provided on the lower template (42) corresponding to the suction block (82). Three or more mounting plates (41) are arranged on the table (3) along its circumference, the mounting plates (41) correspond one to one with the cloth positioning mechanisms (4), and the rotating blocks (47) and the lower template (42) are both arranged on the corresponding mounting plates (41); The upper surface of the outer end of the mounting plate (41) is provided with a step (41a), the step (41a) is provided with a recess (41a1), one end of the lower template (42) has a convex portion (42a) embedded in the recess (41a1), the lower surface of one end of the lower template (42) is in contact with the horizontal surface of the step (41a), the end surface of one end of the lower template (42) is in contact with the vertical surface of the step (41a), and one end of the lower template (42) is connected to the step (41a) via a fastener (7); The fastener (7) passes through the lower template (42) and the step in sequence from top to bottom, and a clearance hole (43a) corresponding to the fastener (7) is provided on the upper template (43). When the upper template (43) and the lower template (42) are molded together, the head of the fastener (7) is located in the clearance hole (43a).

2. A sewing machine according to claim 1, characterized in that: A pair of shaft seats (49) and a rotating shaft (40) rotatably arranged on the two shaft seats (49) are fixed on the upper surface of the table (3); the rotating block (47) is fixed on the rotating shaft (40); the driving assembly (44) includes a cylinder 1 (441), an articulated seat 1 (442) and an articulated seat 2 (443); the articulated seat 1 (442) is fixed on the upper surface of the rotating block (47); the articulated seat 2 (443) is fixed on the upper surface of the table (3); the piston rod of the cylinder 1 (441) is hinged to the articulated seat 1 (442); and the tail of the cylinder 1 (441) is hinged to the articulated seat 2 (443).

3. A sewing machine according to claim 2, characterized in that: The table (3) is fixed with a solenoid valve (20) for controlling the on / off of the gas path of the cylinder one (441); the lower surface of the table (3) is fixed with a switch (17) that can be electrically connected to the solenoid valve (20); the switch (17) has an elastic contact (171) that can float up and down; the frame (1) is fixed with a cylinder three (18) below the switch (17); the piston rod of the cylinder three (18) is connected with a power contact (19); the power contact (19) corresponds to the elastic contact (171) one by one and can abut against each other.

4. A sewing machine according to claim 1, characterized in that: The rotary drive mechanism (5) comprises a rotary table (51) fixed on the frame (1); the table plate (3) is connected to the rotary table (51); and the table plate (3) rotates synchronously with the rotary table (51).

5. A sewing machine according to claim 1, characterized in that: The sewing machine further comprises a guide rail (9) arranged on one side of the frame (1), the guide rail (9) being arranged in a transverse direction, a sliding seat (10) being slidably arranged on the guide rail (9), a screw nut mechanism (11) being arranged on the frame (1) for driving the sliding seat (10) to slide in a transverse direction, and a motor (12) being arranged on the frame (1) for driving the screw nut mechanism (11) to work; a guide rail (13) being arranged on the sliding seat (10), the guide rail (13) being arranged in a longitudinal direction, a slider (14) being slidably arranged on the guide rail (13), the sewing machine head (2) being fixed on the slider (14), a screw nut mechanism (15) being arranged on the sliding seat (10) for driving the sewing machine head (2) to slide in a longitudinal direction, and a motor (16) being arranged on the sliding seat (10) for driving the screw nut mechanism (15) to work.

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