Deviation rectifying mechanism of sewing machine

Abstract

The utility model discloses a deviation rectifying mechanism of a sewing machine, which comprises a mounting frame provided with a mounting vertical plate capable of ascending and descending. The installation vertical plate is provided with a rotatable deviation rectifying installation frame, one end of the deviation rectifying installation frame is provided with a deviation rectifying wheel installation frame, a deviation rectifying wheel and a deviation rectifying belt, and a tension spring is arranged between the other end of the deviation rectifying installation frame and the installation vertical plate. The deviation rectifying belt is tightly attached to the sewing material, and the deviation rectifying belt drives the sewing material to rectify deviation in time after the sensor detects abnormal conditions. The deviation rectifying belt deflects to allow the seam to pass when making contact with the seam of the sewing material, the tension spring controls the deviation rectifying belt to be tightly attached to the sewing material all the time through elasticity, and deviation rectifying operation is completed.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewing machines, in particular to a deviation correcting mechanism for sewing machines. Background Art

[0002] The invention patent No. 201520730002.6 discloses a fabric position adjustment device for a sewing machine, including a friction wheel and a swing seat. A sensor capable of detecting the deviation of the fabric position is arranged on the fabric feed platform. One end of the swing seat is hinged on the fabric feed platform, and the friction wheel is hinged on the other end of the swing seat. The fabric feed platform is provided with a driving member capable of driving the swing seat to swing downward, and the fabric feed platform is also provided with a power source capable of driving the friction wheel to rotate. The device can return the fabric to the set line when the fabric is offset during movement.

[0003] There are certain defects in the disclosure of this patent. When the sensor detects that the fabric is deviated, the driving member drives the friction wheel on the swing seat to press against the fabric. After the friction wheel drives the fabric back to the set route through the power source, the driving member lifts the swing seat to reset, completing one deviation correction. If the fabric deviates multiple times, the driving member needs to be driven multiple times to complete the deviation correction, and the deviation correction cannot be continuous, resulting in poor deviation correction effect. Summary of the invention

[0004] The utility model aims at the defect that the existing mechanism needs to be lifted up and cannot perform the deviation correction operation when encountering the seam of the fabric, and provides a deviation correction mechanism for a sewing machine. When encountering the seam of the sewing material, the deviation correction wheel and the deviation correction belt can automatically adjust the working posture, so that the seam can pass and the deviation correction operation can be completed at the same time.

[0005] The technical solution adopted by the utility model to solve the above-mentioned technical problems is: a sewing machine correction mechanism, including a mounting frame, the mounting frame is provided with a mounting vertical plate that can be raised and lowered; the mounting vertical plate is provided with a rotatable correction mounting frame, one end of the correction mounting frame is provided with a correction wheel mounting frame, a correction wheel and a correction belt, and a tension spring is provided between the other end of the correction mounting frame and the mounting vertical plate.

[0006] In order to optimize the above technical solution, the utility model also includes the following improved technical solution.

[0007] The lifting cylinder is vertically installed on the mounting frame, and the piston rod of the lifting cylinder is connected to the mounting vertical plate.

[0008] The bolt mounting plate is fixedly connected to the upper end of the mounting vertical plate, and the head end of the bolt is mounted on the bolt mounting plate; the screw rod of the bolt passes through the bolt mounting plate and extends downward to be located above the mounting frame.

[0009] The head end of the correcting motor is fixedly connected to the motor mounting frame, the transmission rod of the correcting motor passes through the motor mounting frame and is rotatably connected to the driving wheel, the motor mounting frame is installed on the upper end of the connecting plate, and the lower end of the connecting plate extends forward and is fixedly installed on the rotating wheel mounting frame; the driven wheel is installed on the outer side of the rotating wheel mounting frame, and the synchronous belt is set between the driving wheel and the driven wheel. The transmission rod of the correcting motor drives the driving wheel to rotate, the driving wheel drives the synchronous belt to move, and the synchronous belt drives the driven wheel and the driving wheel to rotate synchronously.

[0010] A synchronous wheel is installed in the rotating wheel mounting frame, and the driven wheel is connected to the synchronous wheel through a gear shaft; a deviation correction wheel mounting frame is installed at the front end of the rotating wheel mounting frame, and the deviation correction wheel is installed in the deviation correction wheel mounting frame; and a deviation correction belt sleeve is arranged between the synchronous wheel and the deviation correction wheel.

[0011] Compared with the prior art, the present invention has a correcting belt that is close to the sewing material. After the sensor detects an abnormal situation, the correcting belt drives the sewing material to correct the deviation in time. When the correcting belt contacts the seam of the sewing material, it will swing to allow the seam to pass. The tension spring controls the correcting belt to always be close to the sewing material through elasticity to complete the correction operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of this embodiment.

[0013] Figure 2 It is a schematic diagram of the three-dimensional structure from another viewing angle of this embodiment.

[0014] Figure 3 It is a side view of this embodiment.

[0015] Figure 4 It is a front view of this embodiment. DETAILED DESCRIPTION

[0016] The embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings.

[0017] Figures 1 to 4 Shown is a schematic structural diagram of the utility model.

[0018] The accompanying drawings are marked as follows: connecting bracket 1, mounting frame 2, lifting cylinder 3, cylinder joint 4, mounting plate 5, slide rail 6, slider 7, fixing block 8, correction mounting frame 9, rotating shaft 10, bolt mounting plate 11, bolt 12, correction motor 13, motor mounting frame 14, connecting plate 15, rotating wheel mounting frame 16, driven wheel 17, synchronous belt 18, synchronous wheel 19, correction wheel mounting frame 20, correction wheel 21, correction belt 22, folding plate 23, sensor 24, tension spring 25, tension spring mounting block 26, tension spring limiting strip 27.

[0019] like Figure 1 and Figure 2As shown, the deflection correction mechanism of the sewing machine of the utility model comprises a lifting cylinder 3, a mounting plate 5, a deflection correction motor 13, a rotating wheel mounting frame 16, a driven wheel 17, a synchronous wheel 19, a deflection correction wheel 21, a deflection correction belt 22, and a tension spring 25. The lifting cylinder 3 drives the deflection correction belt 22 to move up and down, so that the deflection correction belt 22 is close to the sewing material. The deflection correction motor 13 drives the deflection correction belt 22 to rotate, and the deflection correction belt 22 corrects the position of the sewing material on the folding plate 23 to ensure that the length of the sewing material folded into the folding plate 23 is consistent. When the deflection correction belt 22 is close to the thicker sewing material, it swings, and the tension spring 25 drives the deflection correction belt 22 to always be close to the sewing material to complete the deflection correction.

[0020] The mounting frame 2 is fixedly mounted on the connecting bracket 1, and the lifting cylinder 3 is vertically mounted on the mounting frame 2. The mounting plate 5 is arranged in front of the mounting frame 2, and a slide rail 6 is vertically mounted on the rear side of the mounting plate 5. A slider 7 cooperating with the slide rail 6 is arranged on the front side of the mounting frame 2, and the mounting plate 5 moves vertically relative to the mounting frame 2. The driving connecting rod of the lifting cylinder 3 is connected to the cylinder joint 4, and the cylinder joint 4 is connected to the rear end of the fixing block 8, and the front end of the fixing block 8 is fixedly mounted on the side of the mounting plate 5. The deviation correction mounting frame 9 is rotatably mounted on the lower end of the mounting plate 5, and the deviation correction mounting frame 9 rotates around the rotating shaft 10, and the left end of the deviation correction mounting frame 9 is fixedly mounted on the rotating wheel mounting frame 16.

[0021] The driving connecting rod of the lifting cylinder 3 drives the fixed block 8 to move downward, and the fixed block 8 drives the mounting plate 5 to move downward relative to the mounting frame 2. The mounting plate 5 drives the correcting belt 22 on the rotary mounting frame 16 to move downward. The correcting belt 22 is close to the sewing material on the folding plate 23 below, and the correcting belt 22 corrects the position of the sewing material on the folding plate 23.

[0022] like Figure 3 As shown, the bolt mounting plate 11 is fixedly connected to the upper end of the mounting plate 5, the head end of the bolt 12 is mounted on the bolt mounting plate 11, and the screw of the bolt 12 extends downward through the bolt mounting plate 11. The driving connecting rod of the lifting cylinder 3 drives the mounting plate 5 to move downward, and the mounting plate 5 drives the bolt 12 to move downward. When the lower end of the screw of the bolt 12 moves downward to abut against the upper surface of the mounting frame 2, the mounting plate 5 stops moving downward, and the deviation correction belt 22 stops moving downward. By adjusting the distance between the lower end of the screw of the bolt 12 and the upper surface of the mounting frame 2, the moving stroke of the driving connecting rod of the lifting cylinder 3 is controlled, and then the deviation correction belt 22 is adjusted to adapt to the sewing materials of different thicknesses to press the sewing materials on the folding plate 23 downward to correct the deviation.

[0023] The head end of the deviation correction motor 13 is fixedly connected to the motor mounting frame 14, the transmission rod of the deviation correction motor 13 passes through the motor mounting frame 14 and is rotatably connected to the driving wheel, the motor mounting frame 14 is installed on the upper end of the connecting plate 15, and the lower end of the connecting plate 15 extends forward and is fixedly installed on the rotating wheel mounting frame 16. The driven wheel 17 is installed on the outer side of the rotating wheel mounting frame 16, and the synchronous belt 18 is sleeved between the driving wheel and the driven wheel 17. The transmission rod of the deviation correction motor 13 drives the driving wheel to rotate, the driving wheel drives the synchronous belt 18 to move, and the synchronous belt 18 drives the driven wheel 17 to rotate synchronously with the driving wheel.

[0024] A synchronous wheel 19 is installed in the rotating wheel mounting frame 16, and the driven wheel 17 and the synchronous wheel 19 are connected by a gear shaft, and the synchronous wheel 19 and the driven wheel 17 rotate synchronously. The correcting wheel mounting frame 20 is installed at the front end of the rotating wheel mounting frame 16, and the correcting wheel 21 is installed in the correcting wheel mounting frame 20. The correcting belt 22 is sleeved between the synchronous wheel 19 and the correcting wheel 21, and the synchronous wheel 19 drives the correcting belt 22 to rotate, and the correcting belt 22 drives the correcting wheel 21 to rotate synchronously with the synchronous wheel 19. The correcting belt 22 is a rubber belt, which can increase the friction between the belt and the sewing material to avoid slipping between the belt and the sewing material due to too little friction.

[0025] The sewing material moves horizontally to the sewing machine needle and is folded into the folding plate 23 longitudinally. The correction belt 22 is longitudinally arranged above the folding plate 23, and the sensor 24 is arranged below the folding plate 23. The sensor 24 detects the length of the fabric folded into the lower edge of the folding plate 23, and the correction belt 22 corrects the position of the sewing material on the folding plate 23. When the sensor 24 detects that too much fabric is folded in, the correction motor 13 drives the correction belt 22 to rotate, and the correction belt 22 drives the sewing material on the folding plate 23 to roll out the excess fabric at the lower edge of the folding plate 23. When the sensor 24 detects that the fabric is not folded in, the correction motor 13 drives the correction belt 22 to rotate, and the correction belt 22 drives the sewing material on the folding plate 23 to roll under the folding plate 23.

[0026] The tension spring mounting block 26 is mounted on the front end of the fixing block 8, and the tension spring limiting strip 27 is mounted on the right end of the deviation correction mounting frame 9. Three grooves are provided on the tension spring limiting strip 27. One end of the tension spring 25 is connected to the tension spring mounting block 26, and the other end is engaged with the groove on the tension spring limiting strip 27. Different grooves are used to control the degree of stretching of the tension spring 25, and then control the swing amplitude of the deviation correction belt 22. According to the elastic characteristics of the tension spring 25, in the process of the sewing material moving horizontally to the sewing machine needle, the tension spring 25 drives the deviation correction belt 22 to always be close to the fabric for deviation correction.

[0027] like Figure 4As shown, when the correction belt 22 contacts the seam material at the bone joint, since the seam material at the bone joint is thick, the seam material at the bone joint moves horizontally to push the correction belt 22 to move to the left, the correction mounting frame 9 rotates around the rotating shaft 10, and the right end of the correction mounting frame 9 stretches the tension spring 25. After the tension spring 25 is stretched, the reaction force is exerted on the correction mounting frame 9, and the correction mounting frame 9 rotates in the opposite direction around the rotating shaft 10, and the correction belt 22 is closely attached to the seam material for correction. When the correction belt 22 contacts the single-layer seam material, the thickness of the seam material becomes thinner, the correction belt 22 moves to the right, the left end of the correction mounting frame 9 moves downward, the correction mounting frame 9 rotates around the rotating shaft 10, and the right end of the correction mounting frame 9 drives the tension spring 25 to restore to its original state.

[0028] The best embodiment of the present invention has been explained, and various changes or modifications made by ordinary technicians in this field will not depart from the scope of the present invention.

Claims

1. A sewing machine deviation correction mechanism, comprising a mounting frame (2), characterized in that: The mounting frame (2) is provided with a mounting vertical plate (5) that can be raised and lowered; the mounting vertical plate (5) is provided with a rotatable deviation correction mounting frame (9); a deviation correction wheel mounting frame (20), a deviation correction wheel (21) and a deviation correction belt (22) are installed at one end of the deviation correction mounting frame (9); and a tension spring (25) is provided between the other end of the deviation correction mounting frame (9) and the mounting vertical plate (5).

2. The sewing machine deviation correction mechanism according to claim 1, characterized in that: The lifting cylinder (3) is vertically mounted on the mounting frame (2), and the piston rod of the lifting cylinder (3) is connected to the mounting vertical plate (5).

3. The sewing machine deviation correction mechanism according to claim 2, characterized in that: The bolt mounting plate (11) is fixedly connected to the upper end of the mounting vertical plate (5), and the head end of the bolt (12) is mounted on the bolt mounting plate (11); the screw rod of the bolt (12) passes through the bolt mounting plate (11) and extends downward, and is located above the mounting frame (2).

4. The sewing machine deviation correction mechanism according to claim 3 is characterized in that: The head end of the deviation correction motor (13) is fixedly connected to the motor mounting frame (14), the transmission rod of the deviation correction motor (13) passes through the motor mounting frame (14) and is rotatably connected to the driving wheel, the motor mounting frame (14) is installed on the upper end of the connecting plate (15), and the lower end of the connecting plate (15) extends forward and is fixedly installed on the rotating wheel mounting frame (16); the driven wheel (17) is installed on the outer side of the rotating wheel mounting frame (16), and the synchronous belt (18) is sleeved between the driving wheel and the driven wheel (17), the transmission rod of the deviation correction motor (13) drives the driving wheel to rotate, the driving wheel drives the synchronous belt (18) to move, and the synchronous belt (18) drives the driven wheel (17) to rotate synchronously with the driving wheel.

5. The sewing machine deviation correction mechanism according to claim 4, characterized in that: A synchronous wheel (19) is installed in the rotating wheel mounting frame (16), and the driven wheel (17) is connected to the synchronous wheel (19) through a gear shaft; a deflection correction wheel mounting frame (20) is installed at the front end of the rotating wheel mounting frame (16), and a deflection correction wheel (21) is installed in the deflection correction wheel mounting frame (20); and a deflection correction belt (22) is sleeved between the synchronous wheel (19) and the deflection correction wheel (21).

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