Overlock sewing machine

Abstract

The present invention discloses a collar sewing machine, comprising a frame, a collar sewing machine head is arranged on the frame, a first roller and a second roller for feeding are arranged on the frame, and an air blowing pipe for blowing is arranged between the first roller and the second roller. The first roller has a conical body, and a raised spiral feeding guide pattern is formed on the conical body; the spiral feeding guide direction of the spiral feeding guide pattern is toward the sewing machine needle direction. The frame is provided with a collar trademark feeding mechanism, a collar trademark cutting mechanism, and a collar trademark folding mechanism, and a movable trademark grabbing mechanism is arranged between the output port of the collar trademark folding mechanism and the collar trademark feeding position; a trademark position sensor is arranged between the upper garment layer and the collar layer, and when the trademark position sensor detects the collar trademark insertion position, the trademark grabbing mechanism moves the collar trademark from the output port of the collar trademark folding mechanism to the collar trademark insertion position.

Description

Technical Field

[0001] The invention relates to a sewing device, in particular to an overlock sewing collar machine. Background Art

[0002] The invention patent with the patent number of 201610259793.8 discloses an automatic knitting reel round neck sewing machine, including a frame assembly, an automatic feeding mechanism and a flip-type movable collar upper auxiliary device, the frame assembly includes a tripod and a table set on the tripod, the automatic feeding mechanism and the flip-type movable collar upper auxiliary device are respectively fixed on the table, the automatic feeding mechanism includes an active conical wheel and an auxiliary conical wheel, the flip-type movable collar upper auxiliary device includes a flip driving part and a flip arm, the flip driving part is connected to the flip arm, and the flip arm is connected to the active conical wheel. The automatic knitting reel round neck sewing machine disclosed in the patent has the defects of low automation, poor round neck sewing stitches, and inability to automatically put on round neck trademarks. Summary of the invention

[0003] In view of the above-mentioned existing technical status, the present invention provides a collar sewing machine, which can detect the placement position of the collar trademark and sew the collar trademark between the round collar layer and the upper layer, thereby realizing the automation of the collar trademark sewing operation.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: a collar sewing machine, comprising a frame, a collar sewing machine head is arranged on the frame, a first roller and a second roller for feeding are arranged on the frame, and a blowing pipe for blowing is arranged between the first roller and the second roller. The first roller has a conical body, and a raised spiral feeding guide pattern is formed on the conical body; the spiral feeding guide direction of the spiral feeding guide pattern is toward the sewing machine needle direction. The frame is provided with a collar trademark feeding mechanism, a collar trademark cutting mechanism, and a collar trademark folding mechanism, and a movable trademark grabbing mechanism is arranged between the output port of the collar trademark folding mechanism and the collar trademark feeding position; a trademark position sensor is arranged between the upper garment layer and the collar layer, and when the trademark position sensor detects the collar trademark insertion position, the trademark grabbing mechanism moves the collar trademark from the output port of the collar trademark folding mechanism to the collar trademark insertion position.

[0005] In order to optimize the above technical solution, the present invention also includes the following improved technical solution.

[0006] The trademark position sensor comprises a trademark position sensing rod located between the collar layer and the top layer. The trademark position sensing rod is rotatably mounted on the sensor mounting seat. The tail end of the trademark position sensing rod is coupled to the trademark position sensor on the sensor mounting seat.

[0007] The collar trademark feeding mechanism includes a feeding guide rail, a material shifting rod capable of moving up and down is provided on the conveying path of the feeding guide rail, a material pulling device capable of linear movement is provided at the output end of the feeding guide rail, and a material clamping device for clamping the output material is provided on the outer side of the output end.

[0008] The material pulling device comprises a material pulling fixture for clamping the collar trademark, and a material pulling cylinder for driving the material pulling fixture to move.

[0009] The collar trademark folding mechanism comprises a material folding plate which moves linearly between the material pulling device and the material clamping device, and a material folding driving cylinder which drives the material folding plate to move.

[0010] The above-mentioned trademark grabbing mechanism includes a mounting bracket, one end of which is provided with a rotatable grabbing arm, and the movable end of the grabbing arm is provided with a grabbing cylinder and a grabbing clamp; the rotating end of the grabbing arm is rotatably connected to the mounting bracket and is connected to a first synchronous wheel; the other end of the mounting bracket is provided with a feeding motor and a second synchronous wheel, and the first synchronous wheel and the second synchronous wheel are connected by a synchronous belt.

[0011] A deviation correction mechanism is provided between the first roller and the second roller. The deviation correction mechanism comprises an upper clamping plate and a lower clamping plate for clamping materials. The clamping surfaces of the upper clamping plate and the lower clamping plate are respectively provided with rotatable conveyor belts.

[0012] A seam sensor is provided below the first roller and is rotatably mounted on the roller mounting seat. One end of the seam sensor contacts the material sleeved on the first roller and the second roller, and the other end is coupled to the seam sensor.

[0013] Compared with the prior art, the collar sewing machine of the present invention rotates and feeds materials through the first roller and the second roller, detects the seam start position between the upper layer and the collar layer by inserting a trademark position sensing rod between the collar layer and the upper layer, and the control system calculates the collar trademark insertion position according to the seam start position. The trademark grabbing mechanism moves the collar trademark from the output port of the collar trademark folding mechanism to the collar trademark insertion position, thereby realizing the automation of collar trademark sewing and improving working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0015] Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure of the first roller part.

[0016] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure of the center collar trademark feeding device.

[0017] Figure 4 yes Figure 3 Front view of . DETAILED DESCRIPTION

[0018] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0019] Figures 1 to 4 Shown is a schematic structural diagram of the present invention.

[0020] The accompanying drawings are marked as follows: first roller 1, spiral feeding guide pattern 11, roller mounting seat 12, first motor 13, seam sensing plate 15, seam sensor 16, second roller 2, upper clamping plate 31, lower clamping plate 32, trademark position sensing rod 41, sensor mounting seat 42, trademark position sensor 43, feed guide rail 51, material prying rod 52, pulling device 53, pulling cylinder 531, clamping device 54, conveying prying piece 55, folding plate 6, folding drive cylinder 61, mounting bracket 7, grabbing arm 71, grabbing cylinder 72, grabbing clamp 73, first synchronous wheel 74, feeding motor 75, second synchronous wheel 76, synchronous belt 77.

[0021] The overlock collar sewing machine of the present invention has a sewing machine head fixedly mounted on a machine frame, and generally adopts an overlock head. A rotary feeding device is arranged in front of the sewing machine head, and the coat and round collar are mounted on the rotary feeding device. The coat and round collar are driven to rotate by the rotary feeding device, and the sewing path is sent to the sewing position of the round collar sewing machine head. A collar label feeding device is also arranged on the machine frame, and the cut and folded collar label is sent to the sewing path between the coat layer and the round collar layer, and the collar label is sewn and fixed at the same time during the sewing process of the coat and round collar.

[0022] The rotary feeding device comprises a first roller 1 and a second roller 2 for feeding. An air blowing pipe for blowing the material is provided between the first roller 1 and the second roller 2, and the air blowing pipe can assist the rotary feeding of the top layer and the round collar layer.

[0023] A deviation correction mechanism is provided between the first roller 1 and the second roller 2. The deviation correction mechanism includes an upper clamping plate 31 and a lower clamping plate 32 for clamping the material. The clamping surfaces of the upper clamping plate 31 and the lower clamping plate 32 are respectively provided with a rotatable conveyor belt. In order to control the edge alignment of the upper layer and the round collar layer and to accurately sew along the sewing path, the upper clamping plate 31 and the lower clamping plate 32 of the deviation correction mechanism clamp the sewing material, and control the movement of the sewing material through the rotation of the conveyor belt to maintain the sewing path of the sewing material.

[0024] The first roller 1 has a conical body, on which a raised spiral feed guide pattern 11 is formed. The spiral feed guide direction of the spiral feed guide pattern 11 is toward the direction of the sewing machine needle. In the process of rotary feeding of the sewing material, since the sewing material requires the assistance of the air blow pipe, the blown airflow will exert an outward pushing force on the sewing material, causing the correction mechanism to have a large correction resistance and an insensitive correction response. By arranging the raised spiral feed guide pattern 11 on the first roller 1, it is possible to reduce the contact area between the sewing material and the first roller 1, thereby reducing the friction force, and the feed guide pattern 11 can also balance the thrust exerted by the airflow, so that the correction mechanism can better correct the sewing path and improve the sewing quality.

[0025] The first roller 1 is rotatably mounted on a roller mounting seat 12 , a first motor 13 is fixed to the rear of the roller mounting seat 12 , and a driving shaft of the first motor 13 is connected to the first roller 1 .

[0026] A seam sensing piece 15 is provided below the first roller 1 , and the seam sensing piece 15 is rotatably mounted on the roller mounting seat 12 . One end of the seam sensing piece 15 contacts the material sleeved on the first roller 1 and the second roller 2 , and the other end is coupled to the seam sensor 16 .

[0027] The collar trademark feeding device includes a collar trademark feeding mechanism, a collar trademark cutting mechanism, and a collar trademark folding mechanism. A movable trademark grabbing mechanism is provided between the output port of the collar trademark folding mechanism and the collar trademark feeding position; a trademark position sensor is provided between the upper garment layer and the collar layer. When the trademark position sensor detects the collar trademark insertion position, the trademark grabbing mechanism moves the collar trademark from the output port of the collar trademark folding mechanism to the collar trademark insertion position.

[0028] In the prior art, identification of the insertion position of the collar trademark is a technical difficulty, because the insertion position of the collar trademark is fixed at a specific position between the round collar layer and the top layer, and the round collar and the top are soft fabrics that cannot be positioned.

[0029] The trademark position sensor of the present invention comprises a trademark position sensing rod 41 located between the collar layer and the upper layer. The trademark position sensing rod 41 is rotatably mounted on a sensor mounting seat 42. The tail end of the trademark position sensing rod 41 is coupled with a trademark position sensor 43 on the sensor mounting seat 42. The trademark position sensing rod 41 is located in front of the sewing needle, and the collar layer and the upper layer will not interfere with each other after the sewing. When the collar layer and the upper layer are sewn for nearly one circle, since the collar layer and the upper layer have been sewn together at the seam start, the trademark position sensing rod 41 will be moved, thereby triggering the position recognition sensor.

[0030] The collar trademark feeding mechanism includes a feeding guide rail 51, which has multiple sections. A material shifting rod 52 that can move up and down is provided on the conveying path of the feeding guide rail 51. The collar trademark material is a rolled ribbon material, which is conveyed along the feeding guide rail 51. The ribbon material on the feeding guide rail 51 is pulled by the material shifting rod 52, so that the ribbon material has a margin to facilitate subsequent pulling and folding.

[0031] The feed guide rail 51 is provided with a conveying paddle 55 , which can convey the strip material along the feed guide rail 51 and prevent it from retreating.

[0032] A material pulling device 53 capable of linear motion is provided at the output end of the feed guide rail 51 , and a material clamping device 54 for clamping the output material is provided on the outer side of the output end.

[0033] The material pulling device 53 includes a material pulling clamp 532 for clamping the collar trademark, and a material pulling cylinder 531 for driving the material pulling clamp 532 to move. The material pulling clamp 532 clamps the front part of the strip material, and the material pulling cylinder 531 drives the material pulling clamp 532 to move downward, so that the front end of the strip material moves to the material clamping device 54. After the material clamping device 54 clamps and fixes the front end of the strip material, the material pulling cylinder 531 drives the material pulling clamp 532 to retreat.

[0034] The material pulling clamp 532 may be a one-way paddle disposed on the feeding channel of the material pulling device 53 . When the material pulling clamp 532 is driven to retreat by the material pulling cylinder 531 , the strip material is pulled out from the material pulling clamp 532 .

[0035] The collar trademark folding mechanism includes a folding plate 6 that moves linearly between the pulling device 53 and the clamping device 54, and a folding drive cylinder 61 that drives the folding plate 6 to move. In this embodiment, the folding plate 6 can move horizontally and linearly against the pulled strip material to fold the strip material. The collar trademark cutting mechanism includes a cutter located above the folding plate 6, and a cutter cylinder for driving the cutter to move. The cutter cylinder can drive the cutter to cut the output strip material.

[0036] The clamping device 54 includes a clamping cylinder and a clamping fixture driven by the clamping cylinder. After the clamping device 54 fixes the front end of the strip material through the clamping fixture, the strip material is pulled out to a certain length, and the folding drive cylinder 61 drives the folding plate 6 to move horizontally. The folding plate 6 pushes against the pulled strip material to fold it and clamp it by the trademark grabbing mechanism. Then the collar trademark cutting mechanism cuts off the strip material outside the pulling device 53, and the trademark grabbing mechanism sends the clamped trademark material between the top layer and the round collar layer after the trademark position sensor detects the insertion position.

[0037] The trademark grabbing mechanism includes a mounting bracket 7, one end of which is provided with a rotatable grabbing arm 71, and the movable end of the grabbing arm 71 is provided with a grabbing cylinder 72 and a grabbing clamp 73. The grabbing cylinder 72 can control the opening and closing of the grabbing clamp 73. The rotating end of the grabbing arm 71 is rotatably connected to the mounting bracket 7 and is connected to a first synchronous wheel 74. The other end of the mounting bracket 7 is provided with a feeding motor 75 and a second synchronous wheel 76, and the first synchronous wheel 74 and the second synchronous wheel 76 are connected by a synchronous belt 77. After identifying the insertion position of the collar trademark, the feeding motor 75 drives the first synchronous wheel 74 to rotate through the synchronous belt 77, and the first synchronous wheel 74 drives the grabbing arm 71 to rotate, so that the collar trademark clamped by the grabbing clamp 73 moves to the upper trademark position between the upper layer and the round collar layer.

[0038] The best embodiment of the present invention has been described, and various changes or modifications made by those skilled in the art will not depart from the scope of the present invention.

Claims

1. A collar sewing machine, comprising a frame, a collar sewing machine head is arranged on the frame, a first roller (1) and a second roller (2) for feeding materials are arranged on the frame, an air blowing pipe for blowing materials is arranged between the first roller (1) and the second roller (2), and the air blowing pipe can assist the rotation feeding of the upper garment layer and the round collar layer; wherein: The first roller (1) is rotatably mounted on a roller mounting seat (12), the first roller (1) having a conical body, the conical body being provided with a raised spiral feed guide pattern (11); the spiral feed guide pattern (11) has a spiral feed guide direction that is toward the sewing machine needle; the frame is provided with a collar trademark feeding mechanism, a collar trademark cutting mechanism, and a collar trademark folding mechanism, and a movable trademark grabbing mechanism is provided between the output port of the collar trademark folding mechanism and the collar trademark loading position; a trademark position sensor is provided between the upper garment layer and the collar layer, the trademark position sensor is provided between the upper garment layer and the collar layer, and .... When the collar trademark insertion position is detected by the positioning sensor, the trademark grabbing mechanism moves the collar trademark from the output port of the collar trademark folding mechanism to the collar trademark insertion position; the trademark position sensor comprises a trademark position sensing rod (41) located between the collar layer and the top layer, the trademark position sensing rod (41) is rotatably mounted on a sensor mounting seat (42), and the tail end of the trademark position sensing rod (41) is coupled to a trademark position sensor (43) on the sensor mounting seat (42); the collar trademark feeding mechanism comprises a feeding guide rail (51), on which the feeding guide rail (51) is mounted. ) is provided on the conveying path of the feeding guide rail (51) with a material pulling device (53) capable of linear movement, and a material clamping device (54) for clamping the output material is provided on the outer side of the output end; the material pulling device (53) includes a material pulling clamp (532) for clamping the collar trademark, and a material pulling cylinder (531) for driving the material pulling clamp (532) to move; the collar trademark folding mechanism includes a folding plate (6) that moves linearly between the material pulling device (53) and the material clamping device (54), and a folding cylinder (531) for driving the folding plate (6) to move. The trademark grabbing mechanism comprises a mounting bracket (7), one end of which is provided with a rotatable grabbing arm (71), and the movable end of the grabbing arm (71) is provided with a grabbing cylinder (72) and a grabbing fixture (73); the rotating end of the grabbing arm (71) is rotatably connected to the mounting bracket (7) and is connected to a first synchronous wheel (74); the other end of the mounting bracket (7) is provided with a feeding motor (75) and a second synchronous wheel (76), and the first synchronous wheel (74) and the second synchronous wheel (76) are connected via a synchronous belt (77).

2. The overlock sewing machine according to claim 1, characterized in that: A deviation correction mechanism is provided between the first roller (1) and the second roller (2), and the deviation correction mechanism comprises an upper clamping plate (31) and a lower clamping plate (32) for clamping materials, and the clamping surfaces of the upper clamping plate (31) and the lower clamping plate (32) are respectively provided with rotatable conveyor belts.

3. The overlock sewing machine according to claim 1, characterized in that: A seam sensing sheet (15) is provided below the first roller (1). The seam sensing sheet (15) is rotatably mounted on the roller mounting seat (12). One end of the seam sensing sheet (15) contacts the material sleeved on the first roller (1) and the second roller (2), and the other end is coupled to the seam sensor (16).

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