Brassiere shoulder strap threading machine

Abstract

The utility model discloses a kind of underwear shoulder straps to wear buckle machine, including machine body and control system, setting on machine body has tape laying mechanism, first wears 8 character buckle mechanism, sends 8 character buckle mechanism, continuous tape 8 character buckle feeding mechanism, sends 9 character buckle mechanism, wears 9 character buckle mechanism, straightens tape mechanism and secondary wears 8 character buckle mechanism, by pushing tape piece towards 9 character buckle fixture moves to realize underwear shoulder strap is pushed straight to 9 character buckle fixture below;While being set with corresponding sending fiber-optic sensor and receiving fiber-optic sensor above and below pushing tape piece, when sending fiber-optic sensor and receiving fiber-optic sensor are no longer covered by underwear shoulder strap, straighten tape linear module stops working.Straighten tape mechanism and sensor control system: by straighten tape linear module end of shoulder strap is supported and moves back, cooperate sensor real-time detection shoulder strap displacement, realize the accurate control of shoulder strap length when wearing 9 character buckle.This technical scheme effectively solves the technical problems of low degree of automation and poor dimensional accuracy of existing equipment.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment technology, and in particular to a buckle-fastening machine for bra straps such as bra shoulder straps. Background Technology

[0002] Bra straps are used in many items, such as bra bra straps. To make it easier to wear a bra, the straps usually need to be fitted with figure-eight (V) buckles and figure-nine (Nine) buckles. The figure-eight buckle is used to adjust the length of the strap, and the figure-nine buckle is used to form a detachable connection with the bra body.

[0003] Bra straps typically require figure-eight and figure-nine buckles. The figure-eight buckle is used to adjust the length of the strap, while the figure-nine buckle is used to create a detachable connection with the bra body. Traditional manual buckling methods suffer from low efficiency, high cost, and time-consuming and labor-intensive processes.

[0004] While existing automatic button-fastening machines have achieved partial automation, they suffer from key technical flaws: the button-fastening process requires manual threading of the figure-eight button before sewing, and after threading the figure-nine button, the figure-eight button must be threaded back through, making it not fully automated. More critically, when threading the figure-nine button, existing equipment directly threads the shoulder strap through the button from bottom to top, but the threading length is entirely dependent on manual control, presenting the following technical bottlenecks: 1. Currently, the length of the shoulder strap when threading the figure-9 buckle is uncontrollable, which leads to inaccurate allowance for the shoulder strap when threading the figure-8 buckle again, resulting in product size exceeding tolerance; 2. The lack of an effective length control mechanism means that repeated adjustments are required when switching between different product specifications, resulting in low production efficiency; 3. Human intervention leads to quality fluctuations, making it difficult to achieve standardized production. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a strap-straightening mechanism and sensor control system. The system utilizes a straight-line strap-straightening module to support and move the shoulder strap end backward, while sensors detect the shoulder strap displacement in real time, enabling precise control of the shoulder strap length when threading the figure-eight buckle. This solution effectively solves the technical problems of low automation and poor dimensional accuracy in existing equipment.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A bra strap fastening machine includes a figure-9 fastener feeding mechanism, a figure-9 fastener insertion mechanism, and a strap straightening mechanism. The figure-9 fastener insertion mechanism is connected to the figure-9 fastener feeding mechanism, the strap straightening mechanism is connected to a figure-8 fastener feeding mechanism, and a secondary figure-8 fastener insertion mechanism is connected to the figure-9 fastener insertion mechanism. The strap straightening mechanism includes a strap straightening module and a pusher plate. A strap straightening frame capable of linear motion is mounted on the strap straightening module, and the strap straightening frame is connected to a drive component. A strap straightening rod is mounted on the strap straightening frame, and the drive component... The drive strap holder retracts to insert the strap rod into the bra strap; the pusher plate is mounted on the straight strap module via a sliding seat, and moves towards the figure-9 buckle fixture to straighten the bra strap below the figure-9 buckle fixture; at the same time, corresponding transmitting and receiving fiber optic sensors are set above and below the pusher plate. When the transmitting and receiving fiber optic sensors are no longer blocked by the bra strap, the straight strap module stops working.

[0007] Furthermore, a pressure plate for pressing the bra strap from below is provided below the figure-nine buckle fixture, and the pressure plate is connected to a pressure cylinder; the strap-strapping mechanism also includes a gripper, which is connected to a clamping cylinder to form a structure for clamping the head of the bra strap, and the clamping cylinder is mounted on a sliding seat.

[0008] Furthermore, the feeding mechanism for the figure-eight buckles includes a figure-eight buckle vibratory feeder, a figure-eight buckle guide rail, a material transfer fixture, and a push rod. The figure-eight buckle guide rail is connected to the figure-eight buckle vibratory feeder, and the material transfer fixture is connected to a material transfer cylinder. The threading mechanism for the figure-eight buckles includes a figure-eight buckle fixture, a lower threading plate, and a material-pulling cylinder. The figure-eight buckle fixture is opposite to the belt-straightening mechanism and is perpendicularly connected to the tail end of the feeding mechanism for the figure-eight buckles on both sides. The figure-eight buckle fixture is installed near the tail end of the figure-eight buckle guide rail. The material transfer fixture is connected between the figure-eight buckle guide rail and the figure-eight buckle fixture by the drive of the material transfer cylinder. The push rod pushes the material onto the material transfer fixture. The figure-eight buckle is pushed flat onto the figure-eight buckle fixture; the lower strap is installed below the figure-eight buckle fixture, and the bra strap is threaded into the figure-eight buckle from bottom to top through the lower strap; a pusher is set above the figure-eight buckle fixture, and the pusher is connected to a front pusher cylinder, which pushes the bra strap that has passed through the figure-eight buckle back flat; the front pusher cylinder is connected to a horizontal pusher cylinder, and the extension and retraction direction of the horizontal pusher cylinder is parallel to the direction in which the figure-eight buckle enters the figure-eight buckle fixture; a pusher cylinder is set above the figure-eight buckle fixture, and the pusher cylinder locks the figure-eight buckle to push it out of the figure-eight buckle fixture.

[0009] Furthermore, the feeding mechanism for the figure-eight buckle includes a feeding track, along which a push rod, a push claw, and a pressing cylinder are arranged. The push rod and push claw push the figure-eight buckle with the bra strap fixed to it to move along the feeding track, and the pressing head of the pressing cylinder presses the figure-eight buckle flat.

[0010] Furthermore, a secondary figure-eight buckle feeding mechanism is provided opposite the figure-eight buckle feeding mechanism. The secondary figure-eight buckle feeding mechanism includes a clamping claw, a ejector pin, a secondary feeding piece, and a pressing head. The clamping claw is connected to a rotary motor via a rotating base. The ejector pin is positioned between the clamping claws and connected to an ejector pin cylinder. The secondary feeding piece is connected to a drive cylinder and positioned directly above the clamping claw. The pressing head is connected to a cylinder and positioned above and beside the clamping claw to press down on the bra strap. The entire secondary figure-eight buckle feeding mechanism is mounted on a movable base, which is connected to a push cylinder to form a structure that can move toward the figure-eight buckle feeding mechanism.

[0011] Furthermore, a strap mechanism is provided next to the secondary figure-eight buckle mechanism. The strap mechanism includes a movable pull rod and an adjusting pull rod. The adjusting pull rod is close to the secondary figure-eight buckle mechanism. The movable pull rod and the adjusting pull rod are arranged opposite to each other and connected to a first pull rod cylinder.

[0012] Furthermore, the clamping claw includes a first clamping arm, a second clamping arm, a clamping push block, a push block cylinder, a guide rod, a clamping frame, and a return spring. The first and second clamping arms are slidably mounted in the clamping frame via the guide rod. Both the first and second clamping arms are equipped with inclined blocks, each with a first inclined surface. The push block cylinder is mounted on the clamping frame, and its output end is connected to the clamping push block. The clamping push block has second inclined surfaces on both sides. The push block cylinder pushes the clamping push block so that its second inclined surfaces engage with the first inclined surfaces, thereby causing the first and second clamping arms to move away from each other. The push block cylinder pulls the clamping push block, causing the first and second clamping arms to move closer to each other along the guide rod direction under the action of the return spring.

[0013] The beneficial effects of this utility model are as follows: 1. By using a straight-line module to precisely support and control the rearward movement of the shoulder strap end, combined with real-time monitoring of shoulder strap displacement by sensors, the technical challenge of uncontrollable length when threading a figure-nine buckle is effectively solved. This design ensures precise and controllable shoulder strap allowance when threading a figure-eight buckle for the second time, significantly reducing the risk of product size deviations.

[0014] 2. The linkage control design of the belt-straightening mechanism and the buckle-threading mechanism enables rapid automatic calibration of parameters when switching between products of different specifications, significantly reducing equipment debugging time. Simultaneously, the collaborative operation of the first-threading figure-eight buckle mechanism and the belt-straightening mechanism integrates traditional manual operation procedures into a fully automated process.

[0015] 3. The dual fixing system consisting of the pressure plate and the grippers, combined with sensor closed-loop control, effectively avoids quality fluctuations caused by manual intervention. This design significantly improves the stability of the fastening process, providing a reliable technical guarantee for standardized production.

[0016] 4. The combination of the straight-line strapping module and the programmable control system enables the equipment to handle multiple shoulder strap specifications simultaneously. Through modular design, the range of shoulder strap specifications that the same equipment can be compatible with is greatly expanded. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the feeding mechanism for the figure-eight buckle, the feeding mechanism for the figure-nine buckle, and the threading mechanism for the figure-nine buckle. Figure 2 This is a structural diagram of the strap-straightening mechanism and the figure-eight buckle-threading mechanism; Figure 3 A structural diagram showing the coordination between the figure-9 threading mechanism and the belt-winding mechanism; Figure 4 This is a structural diagram of the strap-straightening mechanism and the figure-eight buckle-threading mechanism from another angle; Figure 5 This is a side view of the 9-buckle threading mechanism and the belt-straightening mechanism; Figure 6 This is a structural diagram of the 9-buckle threading mechanism, the strap-straightening mechanism, and the strap-pulling mechanism; Figure 7 The structural diagram shows the secondary figure-eight buckle threading mechanism, the strap pulling mechanism, the nine-buckle threading mechanism, and the strap straightening mechanism; Figure 8 This is a structural diagram of the secondary figure-eight buckle insertion mechanism and the pull strap mechanism; Figure 9 Here is a detailed structural diagram of the clamping claw; Figure 10 A detailed structural diagram of the clamping jaws from another perspective; In the picture, A is the shoulder strap, B is the figure-eight buckle, and C is the figure-nine buckle; 15 is a clamping robot; 4 is the feeding mechanism with figure-eight buckle, 41 is the feeding track, 42 ​​is the push rod, 43 is the pressing cylinder, and 44 is the push claw. 5 is the feeding mechanism for figure-9 buckles, 51 is the vibratory feeder for figure-9 buckles, 52 is the guide rail for figure-9 buckles, 53 is the material transfer fixture, 54 is the material transfer cylinder, and 55 is the push rod; 6 is the figure-9 buckle threading mechanism, 61 is the figure-9 buckle fixture, 62 is the lower belt threading piece, 63 is the material pusher piece, 64 is the belt pressing plate, 65 is the front push cylinder, 66 is the horizontal push cylinder, and 67 is the material feeding cylinder. 7 is the belt winding mechanism, 71 is the belt winding linear module, 72 is the belt winding frame, 73 is the belt winding rod, 74 is the belt pushing plate, 76 is the gripper, and 77 is the material clamping cylinder; 8 is the secondary figure-eight buckle insertion mechanism; 81 is the rotary motor; 82 is the clamping claw; 821 is the first clamping arm; 821 is the second clamping arm; 825 is the clamping push block; 824 is the push block cylinder; 826 is the guide rod; 823 is the clamping frame; 820 is the inclined block; 8201 is the first inclined surface; 8251 is the second inclined surface; 83 is the push cylinder; 84 is the ejector pin; 85 is the secondary inserting mechanism; 86 is the pressing head; 87 is the ejector pin cylinder; 88 is the pneumatic claw; 89 is the rotating mechanism; 890 is the ejector plate. 9 is the belt pulling mechanism, 91 is the movable pull rod, 92 is the first pull rod cylinder, and 93 is the adjusting pull rod. Detailed Implementation

[0018] In this embodiment, refer to Figures 1-10 The bra strap fastening machine is designed for bra straps (bras). It includes a machine body and a control system. The machine body is equipped with a strap feeding mechanism, a first figure-eight buckle feeding mechanism, a figure-eight buckle feeding mechanism, a figure-eight buckle feeding mechanism 4, a figure-nine buckle feeding mechanism 5, a figure-nine buckle fastening mechanism 6, a strap straightening mechanism 7, and a second figure-eight buckle fastening mechanism 8. The figure-eight buckle fastening mechanism 6 is connected to the figure-eight buckle feeding mechanism 5, the strap straightening mechanism 7 is connected to the figure-eight buckle feeding mechanism 4, and the second figure-eight buckle fastening mechanism 8 is connected to the figure-eight buckle fastening mechanism 6. It is used to fasten the figure-eight buckle B for the second time on the bra strap A that has been fastened with a figure-eight buckle C. The clamping robot 15 clamps the figure-eight buckle B with the shoulder strap A fixed on it and transfers it to the feeding mechanism 4 with the figure-eight buckle attached.

[0019] The feeding mechanism 4 with the figure-eight buckle includes a feeding track 41, along which a push rod 42, a push claw 44, and a pressing cylinder 43 are arranged. The push rod 42 and the push claw 44 push the figure-eight buckle B with the shoulder strap A fixed to it to move along the feeding track 41. The pressing head of the pressing cylinder 43 presses the figure-eight buckle B to a flat position so that it can move smoothly. Refer to 1. At this time, the shoulder strap A is suspended in the air.

[0020] The figure-eight buckle feeding mechanism 5 includes a figure-eight buckle vibratory feeder 51, a figure-eight buckle guide rail 52, a material transfer fixture 53, and a push rod 55. The figure-eight buckle guide rail 52 is connected to the figure-eight buckle vibratory feeder 51, and the material transfer fixture 53 is connected to a material transfer cylinder 54. The figure-eight buckle threading mechanism 6 includes a figure-eight buckle fixture 61, a lower threading strip 62, and a material pushing cylinder 67. The figure-eight buckle fixture 61 is opposite to the belt straightening mechanism 7 and is perpendicularly connected to the end of the feeding track 41 of the figure-eight buckle feeding mechanism 4 on both sides. The figure-eight buckle fixture 61 is installed near the end of the figure-eight buckle guide rail 52. The material transfer fixture 53 is connected between the figure-eight buckle guide rail 52 and the figure-eight buckle fixture 61 by the drive of the material transfer cylinder 54. The push rod 55 pushes the figure-eight buckles on the material transfer fixture 53 onto the figure-eight buckle fixture 61. The lower threading strip 62 is installed on the lower part of the figure-eight buckle fixture 61. The shoulder strap A is threaded through the bottom of the bottom strap piece 62 and inserted into the figure-9 buckle B from bottom to top. A pusher piece 63 is set above the figure-9 buckle fixture 61. The pusher piece 63 is connected to a front push cylinder 65. The front push cylinder 65 pushes the shoulder strap A, which has been threaded through the figure-9 buckle C, back flat. The front push cylinder 65 is connected to a horizontal push cylinder 66. The extension and retraction direction of the horizontal push cylinder 66 is parallel to the direction in which the figure-9 buckle C enters the figure-9 buckle fixture 61. A push cylinder 67 is set above the figure-9 buckle fixture 61. The horizontal push cylinder 66 retracts and pulls the front push cylinder 65 and the figure-9 buckle fixture 61 out to one side. The cylinder rod of the push cylinder 67 extends downward and locks the figure-9 buckle C. The horizontal push cylinder 66 extends and pushes the front push cylinder 65 and the figure-9 buckle fixture 61 back to their original positions. At this time, the cylinder rod of the push cylinder 67 pushes the figure-9 buckle C out of the figure-9 buckle fixture 61.

[0021] The strap-straightening mechanism 7 includes a strap-straightening module 71, a pusher plate 74, and a gripper 76. A strap-straightening frame 72 capable of linear motion is mounted on the strap-straightening module 71, and a drive component is connected to the frame 72. A strap-straightening rod 73 is mounted on the frame 72. The drive component drives the frame 72 to extend and retract, allowing the strap-straightening rod 73 to insert into one side of the shoulder strap A. Simultaneously, the pusher plate 74 is mounted on the strap-straightening module 71 via a sliding seat. By moving the pusher plate 74 toward the figure-9 buckle fixture 61, the shoulder strap A is pushed straight down below the figure-9 buckle fixture 61, causing the free end of the shoulder strap A to lie flat on the pusher plate 74. At this time, the strap-straightening frame 72, carrying the strap-straightening rod 73, moves backward along the strap-straightening module 71, thus moving the shoulder strap A backward (see reference). Figure 2), until the free end of shoulder strap A is in the designated position (specifically, there are corresponding transmitting and receiving fiber optic sensors (not shown in the figure) above and below the pusher plate 74. Initially, because shoulder strap A has excess length when it is flattened by the pusher plate 74, the transmitting and receiving fiber optic sensors are blocked by shoulder strap A. Therefore, the winding frame 72, carrying the winding rod 73, will continue to move backward along the winding straight module 71, that is, move shoulder strap A backward. When the transmitting and receiving fiber optic sensors are not in the designated position, the transmission and receiving fiber optic sensors will continue to move backward. If the shoulder strap A is blocked again, the receiving fiber optic sensor receives the light signal sent by the transmitting fiber optic sensor, and the corresponding control system controls the straightening module 71 to stop moving. Below the figure-9 buckle fixture 61, there is a pressure plate 64 for pressing the shoulder strap A from below. The pressure plate 64 is connected to a pressure cylinder, so that the lower threading piece 62 can pass the shoulder strap A from below to above. The gripper 76 is connected to a clamping cylinder 77 for clamping the head (free end) of the shoulder strap A and can pull the shoulder strap A to move so as to lengthen the shoulder strap A that has passed through the figure-9 buckle C. The clamping cylinder 77 is installed on the sliding seat.

[0022] A secondary figure-eight buckle-threading mechanism 8 is provided opposite to the feeding track 41. The secondary figure-eight buckle-threading mechanism 8 includes a clamping claw 82, a ejector pin 84, a secondary threading piece 85, and a pressing head 86. The clamping claw 82 is connected to a rotary motor 81 via a rotating base. The ejector pin 84 is located between the clamping claws 82 and is connected to an ejector pin cylinder 87, which is used to push the shoulder strap A, which has completed the secondary figure-eight buckle-threading B, out of the clamping claw 82 to achieve unloading. The secondary threading piece 85 is connected to a drive cylinder and is located directly above the clamping claw 82. The pressing head 86 is connected to a cylinder and is located next to and above the clamping claw 82 to press down the shoulder strap A. The entire secondary figure-eight buckle-threading mechanism 8 is mounted on a movable base, which is connected to a push cylinder 83 to form a structure that can move toward the feeding track 41 to clamp the figure-eight buckle B.

[0023] Next to the secondary figure-eight buckle mechanism 8, a strap mechanism 9 is provided. The strap mechanism 9 includes a movable pull rod 91 and an adjusting pull rod 93. The adjusting pull rod 93 is close to the secondary figure-eight buckle mechanism 8. The movable pull rod 91 and the adjusting pull rod 93 are opposite to each other and connected to a first pull rod cylinder 92. The adjusting pull rod 93 is connected to a second pull rod cylinder.

[0024] After the figure-9 buckle C, with shoulder strap A already threaded, is pulled out of the figure-9 buckle fixture 61, the loop-shaped shoulder strap A hangs on the movable pull rod 91 and the adjusting pull rod 93. The movable pull rod 91 is controlled by the first pull rod cylinder 92 to adjust the size of the loop of shoulder strap A. At the same time, the figure-8 buckle B is clamped by the clamping claw 82, and the head of shoulder strap A is clamped by the clamping claw 76 and passes through the clamping claw 82 from above. The pressing head 86 presses down to hold shoulder strap A in place. The rotary motor 81 controls the clamping claw 82 to rotate 180 degrees, and the secondary threading plate 85 moves downward to pass the free end (head) of shoulder strap A through the figure-8 buckle B. The rotary motor 81 controls the clamping claw 82 to rotate 180 degrees again, so that the free end of shoulder strap A is above the clamping claw 82. The secondary threading plate 85 moves downward again to pass the free end of shoulder strap A through the figure-8 buckle B, thus completing the secondary threading of shoulder strap A through the figure-8 buckle B.

[0025] The specific process for achieving the figure-9 button C and the second figure-8 button B is as follows: First, the figure-eight buckle B is pressed flat by the pressure head of the pressure cylinder 43. Then, the figure-eight buckle B with the shoulder strap A fixed on it is pushed along the feeding track 41 by the push rod 42 and the push claw 44. See 12. At this time, the shoulder strap A is suspended in the air. (The shoulder strap A with the figure-eight buckle B on is already in place.) Simultaneously, the vibratory feeder 51 transports the figure-eight buckle C to the figure-eight buckle guide rail 52, and then through the guide rail 52 into the transfer fixture 53. The transfer cylinder 54 drives the transfer fixture 53 to connect between the figure-eight buckle guide rail 52 and the figure-eight buckle fixture 61. Then, the push rod 55 pushes the figure-eight buckle C located on the transfer fixture 53 onto the figure-eight buckle fixture 61; (at this point, the figure-eight buckle C is in place). The drive unit drives the strap-winding frame 72 to extend and retract, causing the strap-winding rod 73 to insert into one side of the shoulder strap A. Simultaneously, the pusher plate 74 is mounted on the strap-winding straightening module 71 via a sliding seat. By moving the pusher plate 74 toward the figure-9 buckle fixture 61, the free end of the shoulder strap A is pushed straight down below the figure-9 buckle fixture 61, causing the free end of the shoulder strap A to lie flat on the pusher plate 74. At this time, the strap-winding frame 72, carrying the strap-winding rod 73, moves backward along the strap-winding straightening module 71, thus moving the free end of the shoulder strap A backward (see...). Figure 2-7(The specific implementation principle is as follows: A transmitting fiber optic sensor and a receiving fiber optic sensor are actually installed on one side of the feeding cylinder and aligned with it. At the same time, a receiving fiber optic sensor is located below the pusher plate 74. Initially, because the free end of shoulder strap A has excess length when it is flattened by the pusher plate 74, the transmitting and receiving fiber optic sensors are blocked by shoulder strap A. Therefore, the winding frame 72, carrying the winding rod 73, will continue to move backward along the winding straight module 71, that is, move shoulder strap A backward. When the transmitting and receiving fiber optic sensors are no longer blocked by shoulder strap A, the receiving fiber optic sensor receives the light signal sent by the transmitting fiber optic sensor, that is, the corresponding control system controls the winding straight module 71 to stop moving); (At this time, shoulder strap A has been folded and is ready to enter the process of threading the figure-9 buckle). Then, the pressing cylinder drives the pressing plate 64 to press down the shoulder strap A from below. At this time, the lower threading plate 62 passes the shoulder strap A from below to above, so that the free end of the shoulder strap A passes through the figure-9 buckle C. Then, the forward pushing cylinder 65 drives the pushing plate 63 to push the shoulder strap A, which has passed through the figure-9 buckle C, back flat. (At this time, the shoulder strap A has been inserted into the figure-9 buckle and is ready for the next process.) Then, the horizontal push cylinder 66 pulls the forward push cylinder 65 and the figure-eight buckle fixture 61 to one side, aligning the free end of shoulder strap A with the gripper 76. The clamping cylinder 77 moves the gripper 76 forward to clamp the head (free end) of shoulder strap A, and then moves it backward to stretch shoulder strap A through the figure-eight buckle C. In fact, when performing the above steps, the push cylinder 83 simultaneously pushes the entire secondary figure-eight buckle mechanism 8, and then the gripper 82 clamps the figure-eight buckle B located at the end of the feeding track 41, so shoulder strap A will be above figure-eight buckle B. It should also be noted that because the push cylinder 83 will... When the entire secondary figure-eight buckle mechanism 8 is pushed, the movable pull rod 91 and the adjusting pull rod 93 will also move accordingly. At the same time, the movable pull rod 91 will lean against the side of the shoulder strap A (because the shoulder strap A will bend when the figure-eight buckle C is inserted, and the adjusting pull rod 93 leans against the corresponding bend position). Moreover, the cylinder rod of the material feeding cylinder 67 extends downward to lock the figure-eight buckle C. The horizontal push cylinder 66 pushes the forward push cylinder 65 and the figure-eight buckle fixture 61 back to their original positions. At this time, the cylinder rod of the material feeding cylinder 67 pushes the figure-eight buckle C out of the figure-eight buckle fixture 61 (so at this time, the shoulder strap A is hanging on the adjusting pull rod 93, and the free end of the shoulder strap A is pulled by the gripper 76).

[0026] Next, the pressure head 86 moves downward, pressing down on shoulder strap A. The gripper 76 can then release the free end of shoulder strap A and reset. Then, the secondary threading 85 moves downward to pass the free end (head) of shoulder strap A through the figure-eight buckle B. The rotary motor 81 again controls the gripper 82 to rotate 180 degrees, bringing the free end of shoulder strap A above the gripper 82. The secondary threading 85 then moves downward again to pass the free end of shoulder strap A through the figure-eight buckle B, thus completing the secondary threading of shoulder strap A through the figure-eight buckle B. (At this point, the secondary threading of the figure-eight buckle B is complete.)

[0027] See Figure 9-10 Regarding the specific structure of the clamping claw 82, the clamping claw 82 includes a first clamping arm 821, a second clamping arm 822, a clamping push block 825, a push block cylinder 824, a guide rod 826, a clamping frame 823, and a return spring (not shown in the figure, mounted on the guide rod 826, used to keep the first clamping arm 821 and the second clamping arm 822 in a clamped state). The first clamping arm 821 and the second clamping arm 822 are slidably mounted in the clamping frame 823 via the guide rod 826. Both the first clamping arm 821 and the second clamping arm 822 are equipped with inclined blocks 820, and each inclined block 820 is provided with a first inclined surface. 8201, the push block cylinder 824 is mounted on the clamping frame 823, and the output end of the push block cylinder 824 is connected to the clamping push block 825. The clamping push block 825 has a second inclined surface 8251 on both sides. The push block cylinder 824 pushes the clamping push block 825 so that the second inclined surface 8251 cooperates with the first inclined surface 8201 respectively, thereby making the first clamping arm 821 and the second clamping arm 822 move away from each other. The push block cylinder 824 pulls the clamping push block, and the first clamping arm 821 and the second clamping arm 822 move closer to each other along the direction of the guide rod 82 under the action of the return spring (to achieve clamping of the figure-eight buckle B).

[0028] It also includes a pneumatic gripper 88 and a rotating mechanism 89 that drives the pneumatic gripper 88 to rotate. The rotating mechanism 89 drives the pneumatic gripper 88 to rotate counterclockwise, so that the pneumatic gripper 88 approaches and clamps the free end of the shoulder strap A. Then, the rotating mechanism 89 drives the pneumatic gripper 88 to rotate clockwise, thus pulling the shoulder strap A. Since the size of the shoulder strap A buckle needs to be controlled according to actual production, how to achieve the size of the shoulder strap A buckle requires referring back to the movable lever 91 and adjusting lever 93 described above. After the shoulder strap A passes through the figure-eight buckle B for the second time, its other end will form a loop structure. At this time, the movable lever 91 and adjusting lever 93 can approach each other, so that the corresponding loop structure is lightly clamped (without pulling the shoulder strap). (A is firmly clamped), while the figure-9 buckle C will be located below the movable pull rod 91 and the adjusting pull rod 93. The movable pull rod 91 and the adjusting pull rod 93 will block the figure-9 buckle C, preventing it from moving with the figure-9 buckle C during the subsequent pulling of the shoulder strap A; moreover, by adjusting the movable pull rod 91 and the adjusting pull rod 93, the distance between the shoulder strap A and the clamping claw 82 can be controlled. For example, if the movable pull rod 91 and the adjusting pull rod 93 move the shoulder strap A away from the clamping claw 82, the pneumatic claw 88 will pull the shoulder strap A, and the corresponding snare structure will be narrowed (note that the movable pull rod 91 and the adjusting pull rod 93 will not firmly clamp the shoulder strap A, so it can be pulled at this time), and then the snare structure will be restricted between the movable pull rod 91 and the adjusting pull rod 93; When the snare structure narrows, the corresponding ejector pin 84 will complete the second insertion of the figure-eight buckle B and be pushed out from the clamping claw 82. Moreover, the ejector plate 890 located on the side of the adjusting rod 93 will realize the ejection of the snare structure and realize the unloading under the drive of the pusher pneumatic.

[0029] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A bra strap fastening machine, comprising a figure-9 fastener feeding mechanism, a figure-9 fastener fastening mechanism, and a strap straightening mechanism, wherein the figure-9 fastener fastening mechanism is connected to the figure-9 fastener feeding mechanism, the strap straightening mechanism is connected to a figure-8 fastener feeding mechanism, and a secondary figure-8 fastener fastening mechanism is connected to the figure-9 fastener fastening mechanism. Its features are: The strap-straightening mechanism includes a strap-straightening module and a pusher plate. The strap-straightening module is equipped with a strap-straightening frame that can make linear movements, and the strap-straightening frame is connected to a drive component. A strap-straightening rod is installed on the strap-straightening frame, and the drive component drives the strap-straightening frame to make telescopic movements so that the strap-straightening rod is inserted into the bra strap. The pusher plate is mounted on the straightening module via a sliding seat. The pusher plate moves toward the figure-9 buckle fixture to straighten the bra straps below the figure-9 buckle fixture. At the same time, corresponding transmitting and receiving fiber optic sensors are set above and below the pusher plate. When the transmitting and receiving fiber optic sensors are no longer blocked by the bra straps, the straightening module stops working.

2. The bra strap fastening machine according to claim 1, characterized in that: Below the figure-nine buckle fixture is a pressure plate for pressing the bra strap from below, and the pressure plate is connected to a pressure cylinder; the strap-strapping mechanism also includes a gripper, which is connected to a clamping cylinder to form a structure for clamping the head of the bra strap, and the clamping cylinder is mounted on a sliding seat.

3. The bra strap fastening machine according to claim 2, characterized in that: The feeding mechanism for figure-9 buckles includes a figure-9 buckle vibratory feeder, a figure-9 buckle guide rail, a transfer fixture, and a push rod. The figure-9 buckle guide rail is connected to the figure-9 buckle vibratory feeder, and the transfer fixture is connected to a transfer cylinder. The threading mechanism for figure-9 buckles includes a figure-9 buckle fixture, a lower threading plate, and a material-pulling cylinder. The figure-9 buckle fixture is opposite to the belt-straightening mechanism and is perpendicularly connected to the tail end of the feeding mechanism for figure-8 buckles on both sides. The figure-9 buckle fixture is installed near the tail end of the figure-9 buckle guide rail. The transfer fixture is connected between the figure-9 buckle guide rail and the figure-9 buckle fixture by the drive of the transfer cylinder. The push rod moves the figure-9 buckles on the transfer fixture... The figure-eight buckle is pushed flat onto the figure-nine buckle fixture; the lower strap is installed below the figure-nine buckle fixture, and the bra strap is threaded into the figure-nine buckle from bottom to top through the lower strap; a pusher is set above the figure-nine buckle fixture, and the pusher is connected to a front pusher cylinder, which pushes the bra strap that has passed through the figure-nine buckle back flat; the front pusher cylinder is connected to a horizontal pusher cylinder, and the extension and retraction direction of the horizontal pusher cylinder is parallel to the direction in which the figure-nine buckle enters the figure-nine buckle fixture; a pusher cylinder is set above the figure-nine buckle fixture, which locks the figure-nine buckle to push it out of the figure-nine buckle fixture.

4. The bra strap fastening machine according to claim 1, characterized in that: The feeding mechanism for the figure-eight buckle includes a feeding track, along which a push rod, a push claw, and a pressing cylinder are arranged. The push rod and push claw push the figure-eight buckle with the bra strap fixed to it to move along the feeding track, and the pressing head of the pressing cylinder presses the figure-eight buckle flat.

5. The bra strap fastening machine according to claim 4, characterized in that: Opposite to the figure-eight hook feeding mechanism is a secondary figure-eight hook threading mechanism. The secondary figure-eight hook threading mechanism includes a clamping claw, a ejector pin, a secondary threading piece, and a pressing head. The clamping claw is connected to a rotary motor via a rotating base. The ejector pin is positioned between the clamping claws and connected to an ejector pin cylinder. The secondary threading piece is connected to a drive cylinder and positioned directly above the clamping claw. The pressing head is connected to a cylinder and positioned above and beside the clamping claw to press down on the bra strap. The entire secondary figure-eight hook threading mechanism is mounted on a movable base, which is connected to a push cylinder to form a structure that can move toward the figure-eight hook feeding mechanism.

6. The bra strap fastening machine according to claim 5, characterized in that: Next to the secondary figure-eight buckle mechanism is a strap mechanism, which includes a movable pull rod and an adjusting pull rod. The adjusting pull rod is close to the secondary figure-eight buckle mechanism, and the movable pull rod and the adjusting pull rod are arranged opposite to each other and connected to a first pull rod cylinder.

7. The bra strap fastening machine according to claim 6, characterized in that: The clamping claw includes a first clamping arm, a second clamping arm, a clamping push block, a push block cylinder, a guide rod, a clamping frame, and a return spring. The first and second clamping arms are slidably mounted in the clamping frame via the guide rod. Both the first and second clamping arms are equipped with inclined blocks, each with a first inclined surface. The push block cylinder is mounted on the clamping frame, and its output end is connected to the clamping push block. The clamping push block has second inclined surfaces on both sides. The push block cylinder pushes the clamping push block so that its second inclined surfaces engage with the first inclined surfaces, thereby causing the first and second clamping arms to move away from each other. Alternatively, the push block cylinder pulls the clamping push block, causing the first and second clamping arms to move closer together along the guide rod under the action of the return spring.

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