Lamella-type mop automatic sewing apparatus and sewing method

Abstract

The application discloses a laminated mop automatic sewing device and a sewing method thereof, and adopts a flow line production mode to prepare the laminated mop. On one hand, the work load and work intensity of workers are reduced, and on the other hand, the automation level of operation is improved, and the production capacity is greatly improved without increasing the operation personnel. The application solves the problem of low sewing production efficiency of the existing laminated mop.

Description

Technical Field

[0001] This invention relates to the field of sewing equipment technology, specifically to an automatic sewing device for stacked mop and its sewing method. Background Technology

[0002] For ordinary rags and mops, the main sewing process involves overlocking the edges of the base material (a woven fabric of sponge and cloth) to prevent it from scattering and falling off during use. Overlocking is done using an overlock sewing machine, which is very efficient.

[0003] There is a special type of folded mop head (for mounting on a mop), which has a more complex manufacturing process. After overlocking the base fabric, a reinforcing thin canvas is first sewn onto the overlocked base fabric, and then four Velcro patches (for securing the mop head) are sewn on. When sewing these Velcro patches, the outer edges of all four sides of the base fabric are folded up so that the heads of the Velcro patches are tucked into the folds, and then sewn to secure the Velcro patches.

[0004] The production of the aforementioned stacked mop requires first sewing the reinforcing canvas together using an overlock machine and a double-needle flatbed sewing machine, and then sewing the Velcro patch to the base fabric using a single-needle flatbed sewing machine. When sewing the reinforcing canvas onto the base fabric, workers must take materials (base fabric and reinforcing canvas) sequentially, constantly ensuring alignment of the two pieces during the sewing process; the workload is slightly greater than that of the overlock sewing. The workload is significantly increased when folding and sewing the Velcro patch around the outer edges of the base fabric. The base fabric itself is relatively thick and exhibits noticeable elasticity after folding, requiring frequent gentle hand pressure. There are specified distances between the Velcro patches, necessitating a head tilt to check their position each time material is added. To ensure the Velcro patch is securely sewn, each patch must be manually backstitched twice during the sewing process, resulting in inconsistent stitching.

[0005] Actual statistics show that sewing one piece at a time takes 9 seconds at the overlock machine station, 14 seconds at the double-needle flatbed sewing machine station, and 63 seconds at the final single-needle flatbed sewing machine station. With these three workers as a team, the maximum output for a single shift (9 hours) is around 500 pieces. Without increasing the number of workers (especially those in the third process), production capacity is severely insufficient. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, an automatic sewing device and sewing method for stacked mops are provided to solve the problem of low sewing production efficiency of existing stacked mops.

[0007] To achieve the above objectives, an automatic sewing device for stacked mop fabric is provided, comprising:

[0008] Two conveyor belts are spaced apart, each conveyor belt having an input end and an output end;

[0009] The first material box is located on one side of the preceding conveyor belt. The first material box has two receiving channels for respectively accommodating the vertically arranged bottom material sheet and the reinforcing canvas sheet. One end of the receiving channel has a discharge port facing the preceding conveyor belt.

[0010] The first feeder, used to pick up the bottom sheet and reinforcing canvas sheet from the discharge port of the first hopper and place them on the front conveyor belt, is located on the other side of the front conveyor belt.

[0011] A first sewing device for sewing a reinforcing canvas sheet onto a base sheet to form a reinforcing sheet is disposed between two conveyor belts;

[0012] The second material box is located on one side of the rear conveyor belt. The second material box has a receiving channel for accommodating vertically arranged hook and loop fasteners. One end of the receiving channel has a discharge port facing the rear conveyor belt.

[0013] The second feeder, used to pick up hook and loop fastener sheets from the outlet of the second feed hopper and place them onto the reinforcing sheet on the subsequent conveyor belt, is located on one side of the subsequent conveyor belt.

[0014] A spot welding device for spot welding hook and loop fasteners to reinforcing sheets to form initial packing sheets is located on the other side of the subsequent conveyor belt.

[0015] The third material box has a receiving channel for accommodating the vertically arranged initial loading material pieces, and a discharge port is opened at one end of the receiving channel.

[0016] The second sewing device is located at the outlet of the third material box. The second sewing device is equipped with a third material picker for picking up the initial material sheet from the outlet of the third material box and placing it on the worktable of the second sewing device. The second sewing device is also equipped with a folding mechanism for flipping the outer edge of the initial material sheet toward the inside of the initial material sheet. After the outer edge of the initial material sheet is folded inward, the second sewing device sews the folded outer edge onto the initial material sheet to form a stacked mop.

[0017] Furthermore, multiple partitions are formed on the outer side of the conveyor belt, and a positioning space is formed between two adjacent partitions.

[0018] Furthermore, the receiving channel is inclined, and the discharge port is located at the lower end of the receiving channel.

[0019] Furthermore, a pusher is slidably provided inside the receiving channel.

[0020] Furthermore, the third feeder includes:

[0021] The crossbeam is mounted on the frame of the conveyor belt, and the crossbeam is equipped with a guide sleeve that can be rotated.

[0022] The guide sleeve is slidably fitted onto the middle part of the slide rod;

[0023] A suction cup is attached to one end of the slide bar;

[0024] The first rotating shaft is rotatably mounted on the crossbeam and located on the side of the first rotating shaft away from the first material box. The central axis of the first rotating shaft is arranged in the same direction as the first rotating axis of the guide sleeve. The first rotating shaft is connected to a crank, which is pivotally connected to the other end of the slide rod.

[0025] The drive mechanism for driving the first rotating shaft is mounted on the crossbeam.

[0026] Furthermore, the drive mechanism includes:

[0027] The first gear is coaxially mounted on the first rotating shaft;

[0028] The first cylinder is mounted on the crossbeam. The piston rod of the first cylinder is coaxially connected to the first rack, and the first rack meshes with the first gear.

[0029] Furthermore, the third feeder also includes two first limiting plates disposed on opposite sides of the suction cup. The first limiting plates are adjustablely mounted on the suction cup. After the suction cup of the third feeder picks up the initial material sheet and places it on the worktable of the second sewing device, the first limiting plates press against the opposite sides of the initial material sheet. There are four folding mechanisms, which are opposite to each other in pairs. One pair of folding mechanisms disposed on the opposite sides of the two first limiting plates flips the outer edge of the initial material sheet upward toward the opposite side of the two first limiting plates.

[0030] Furthermore, the folding mechanism includes:

[0031] The side plates are vertically mounted on the workbench and are located on opposite sides of the initial loading station on the workbench. The side plates are provided with zigzag guide grooves with rounded transitions. The guide grooves are set along the length or width of the station and the zigzag direction of the guide grooves is set towards the workbench.

[0032] The pressure plate is attached to the worktable, and the opposite ends of the pressure plate are connected to moving rods, which slide in the guide grooves.

[0033] The folding cylinder used to drive the slide bar is mounted on the side plate.

[0034] Furthermore, a support is installed on the frame of the downstream conveyor belt, and a rotatable second shaft is mounted on the support. A second gear is coaxially mounted on the second shaft, and a support is mounted on the second shaft. The support is positioned above the second gear. A second cylinder is mounted on the support, and a second rack is coaxially connected to the piston rod of the second cylinder. The second rack meshes with the second gear.

[0035] This invention provides a method for sewing stacked mops using an automatic stacked mop sewing device, comprising the following steps:

[0036] Multiple base material sheets and multiple reinforcing canvas sheets are respectively placed in the measuring and receiving channels of the first material box, such that the multiple base material sheets are arranged along the length direction of one receiving channel and the base material sheets are arranged vertically, and the multiple reinforcing canvas sheets are arranged along the length direction of another receiving channel and the reinforcing canvas sheets are arranged vertically.

[0037] Take the first base material sheet and place it on the input end of the preceding conveyor belt;

[0038] The first feeder picks up the second base sheet and the first reinforcing canvas sheet from the outlet of the first material box and places them on the front conveyor belt, so that the first reinforcing canvas sheet overlaps the first base sheet;

[0039] The output end of the preceding conveyor belt continuously transports the stacked base sheet and reinforcing canvas sheet to the worktable of the first sewing device;

[0040] The first sewing device sews the reinforcing canvas sheet onto the base sheet to form a reinforcing sheet and pushes it to the input end of the subsequent conveyor belt;

[0041] The second feeder picks up the Velcro sheet from the outlet of the second hopper and places it on the reinforcing sheet on the subsequent conveyor belt;

[0042] The spot welding device spot welds the hook and loop fastener to the reinforcing sheet to form the initial assembly sheet;

[0043] The initial batch of material is loaded into the receiving channel of the third material box;

[0044] The third feeder picks up the initial sheet material from the outlet of the third material box and places it on the worktable of the second sewing device;

[0045] The folding mechanism flips the outer edge of the initial loading sheet towards the inside of the initial loading sheet, and the outer edge of the initial loading sheet fits into the middle of the initial loading sheet;

[0046] The second sewing device sews the folded outer edge onto the initial fabric piece to form a stacked mop.

[0047] The beneficial effects of the present invention are that the automatic sewing equipment and sewing method for the stacked mop of the present invention adopts the assembly line production method to prepare the stacked mop. On the one hand, it reduces the workload and intensity of workers, and on the other hand, it improves the level of automation of the operation, and significantly increases the production capacity without increasing the number of workers. Attached Figure Description

[0048] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0049] Figure 1 This is a schematic diagram of the structure of the stacked mop automatic sewing device according to an embodiment of the present invention.

[0050] Figure 2 This is a schematic diagram of the conveyor belt structure according to an embodiment of the present invention.

[0051] Figure 3 This is a schematic diagram of the structure of the first material box according to an embodiment of the present invention.

[0052] Figure 4 This is a schematic diagram of the structure of the first feeder according to an embodiment of the present invention.

[0053] Figure 5 This is a schematic diagram of the structure of the pusher component according to an embodiment of the present invention.

[0054] Figure 6 This is a schematic diagram of the structure of a single first feeder according to an embodiment of the present invention.

[0055] Figure 7 This is an exploded structural diagram of a single first feeder according to an embodiment of the present invention.

[0056] Figure 8 This is a schematic diagram of the structure of the second material box according to an embodiment of the present invention.

[0057] Figure 9 This is a schematic diagram of the material handling state of the second material handler in an embodiment of the present invention.

[0058] Figure 10 This is a schematic diagram of the feeding state of the second feeder in an embodiment of the present invention.

[0059] Figure 11 This is a schematic diagram of the structure of the third feeder in an embodiment of the present invention.

[0060] Figure 12 This is a schematic diagram of the material handling state of the third material handler in an embodiment of the present invention.

[0061] Figure 13 This is a schematic diagram of the feeding state of the third feeder in an embodiment of the present invention.

[0062] Figure 14 This is a schematic diagram of the folding mechanism at the short side of the initial material sheet according to an embodiment of the present invention.

[0063] Figure 15 This is a schematic diagram of the short side folding state of the initial material sheet in an embodiment of the present invention.

[0064] Figure 16This is a schematic diagram of the manufacturing process of the stacked mop according to an embodiment of the present invention. Detailed Implementation

[0065] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0066] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0067] First refer to Figure 16 The manufacturing process of the stacked mop in this invention is as follows: A reinforcing canvas sheet B is laid on a base sheet A (i.e., the overlocked base sheet), and the reinforcing canvas sheet B is sewn to the base sheet A; then, a hook and loop fastener sheet C is laid on the base sheet with the reinforcing canvas sheet sewn on, and the hook and loop fastener sheet is temporarily fixed to form a preliminary assembly sheet D; the outer edges of one pair of opposite long sides of the preliminary assembly sheet are folded over and sewn; the outer edges of one pair of opposite short sides of the preliminary assembly sheet are folded over and sewn to form the stacked mop. The automatic sewing equipment for the stacked mop of this invention is used to efficiently sew overlocked base sheets to prepare stacked mops.

[0068] For the specific structure of the stacked mop automatic sewing device of the present invention, please refer to the following. Figures 1 to 16 As shown.

[0069] The present invention provides an automatic sewing device for stacked mop cloths, comprising: a conveyor belt 1, a first material box 2, a first material feeder 3, a first sewing device 4, a second material box 5, a second material feeder 6, a spot welding device 7, a third material box 8, and a second sewing device 9.

[0070] The conveyor belt 1 has an input end and an output end. The number of conveyor belts 1 is at least two.

[0071] The two conveyor belts are set at an interval, that is, the output end of the front conveyor belt is set opposite to the input end of the rear conveyor belt.

[0072] Combination Figure 2 As shown, multiple partitions 11 are formed on the outer surface of the conveyor belt. A positioning space is formed between two adjacent partitions 11. Each partition is arranged along the width direction of the conveyor belt. The multiple partitions are evenly spaced along the length direction of the conveyor belt.

[0073] Preferably, the length of the positioning space is adapted to the length of a base material piece A, and the width of the positioning space is slightly larger than the width of the base material piece A.

[0074] The first material bin 2 is located on one side of the preceding conveyor belt a. The first material bin 2 contains two receiving channels. These two channels are used to respectively receive the vertically arranged base material sheet A and the reinforcing canvas sheet B. Specifically, the two receiving channels are arranged along the length of the conveyor belt.

[0075] In this embodiment, combined with Figure 3 and Figure 5 As shown, one trough near the input end of the preceding conveyor belt is used to hold multiple base material sheets; the bottom of another trough near the output end of the preceding conveyor belt is used to hold multiple reinforcing canvas sheets. (Continue reading...) Figure 5 As shown, a discharge port is provided at one end of the receiving channel. The discharge port is positioned facing the preceding conveyor belt a. The size of the discharge port is smaller than the size of the base material sheet or reinforcing canvas sheet, that is, the length of the discharge port is smaller than the length of the base material sheet or reinforcing canvas sheet, and the width of the discharge port is smaller than the width of the base material sheet or reinforcing canvas sheet.

[0076] In this embodiment, the receiving channel is inclined. The discharge port is located at the lower end of the receiving channel.

[0077] Each base sheet and reinforcing canvas sheet is vertically arranged in the receiving channel. Preferably, the size of the discharge port is slightly smaller than the size of the base sheet or reinforcing canvas sheet. When the first base sheet or reinforcing canvas sheet at the lower end of the receiving channel is pulled out from the discharge port, subsequent base sheets or reinforcing canvas sheets move downward along the inclined direction of the receiving channel under the action of the pusher, so that the base sheet or reinforcing canvas sheet at the lower end of the receiving channel always abuts against the end face of the lower end of the receiving channel.

[0078] See Figure 5 As shown, a pusher c is slidably installed inside the receiving channel. Specifically, the pusher is a movable trolley with a certain weight. A pressure equalizing plate is formed on the side of the movable trolley facing the lower end of the receiving channel. After the base material sheet or reinforcing canvas sheet is placed in the receiving channel, the pressure equalizing plate of the movable trolley presses against one side of the base material sheet or reinforcing canvas sheet.

[0079] In a preferred embodiment, rollers are installed on the bottom of the moving trolley and at opposite ends of the pressure equalizing plate. The rollers of the moving trolley slide against the bottom wall of the receiving channel. The rollers at opposite ends of the pressure equalizing plate slide against the side walls of the receiving channel. By installing the rollers, the friction between the moving trolley and the channel wall is reduced.

[0080] See Figure 1 , Figure 3 and Figure 4 The first feeder 3 is located on the other side of the preceding conveyor belt a.

[0081] The first feeder 3 is used to pick up the bottom material sheet A and the reinforcing canvas sheet B from the discharge port of the first material box 2 and place them on the preceding conveyor belt a.

[0082] The first feeder 3 includes two feeder units. One feeder unit is used to feed the base sheet A, while the other feeder unit is used to feed the reinforcing canvas sheet B.

[0083] For details on the structure of each material handling unit, please refer to [link / reference]. Figure 6 and Figure 7 As shown, the material handling unit includes: a crossbeam d, a slide bar e, a suction cup f, a first rotating shaft g, and a drive mechanism.

[0084] The crossbeam d is mounted on the frame of the conveyor belt. The crossbeam d is equipped with a guide sleeve that can be rotated.

[0085] The guide sleeve is slidably fitted in the middle of the slide rod e, that is, the middle of the slide rod e is slidably fitted in the guide sleeve on the crossbeam.

[0086] The suction cup f is mounted on one end of the slide rod e. The suction cup is a non-contact suction cup.

[0087] A first rotating shaft g is rotatably mounted on the crossbeam d and positioned on the side of the first rotating shaft g away from the first material box 2. The central axis of the first rotating shaft g is aligned with the axis of rotation of the guide sleeve. A crank h is connected to the first rotating shaft g. The crank h is pivotally connected to the other end of the slide rod e.

[0088] The drive mechanism is mounted on the crossbeam d. The drive mechanism is used to drive the first rotating shaft g.

[0089] Specifically, the drive mechanism includes: a first gear i-1, a first cylinder i-2, and a first rack i-3.

[0090] The first gear i-1 is coaxially mounted on the first rotating shaft g. The first cylinder i-2 is mounted on the crossbeam d. The piston rod of the first cylinder i-2 is coaxially connected to the first rack i-3. The first rack i-3 meshes with the first gear i-1.

[0091] In this embodiment, the crossbeam is made of channel steel. The crossbeam has a vertically arranged through hole. A first rack is slidably mounted in the through hole. A first cylinder is mounted on the upper part of the crossbeam and coaxially connected to the first rack. A first rotating shaft is rotatably mounted on the two flanges of the crossbeam.

[0092] When picking up or placing materials, the piston rod of the first cylinder moves up and down, driving the first gear to rotate, which in turn drives the first shaft to rotate in both directions.

[0093] Specifically, such as Figure 6The illustrated state is that during material handling, the crank rotates around the central axis of the first shaft, causing the middle part of the slide rod to move within the guide sleeve. This allows the suction cup at one end of the slide rod to align with the material (such as a base sheet or reinforcing canvas sheet), then retract and place the material into the positioning space of the conveyor belt. The suction cup utilizes negative pressure to adsorb the material during this process. After the material is placed on the conveyor belt, the suction cup is closed to release the material onto the conveyor belt.

[0094] Because the substrate sheet is loose and breathable, vacuum adsorption is inefficient. Non-contact suction cups, on the other hand, blow air into a specific device, which then passes through a special internal conduit to expel air around the device, creating negative pressure at the center and thus adsorbing the material. In this embodiment, the suction cup is a non-contact Bernoulli suction cup.

[0095] For reinforced canvas sheets, either vacuum suction cups or non-contact suction cups are options.

[0096] For the base material of the subsequently loaded Velcro sheet, whose surface is already uneven, a non-contact suction cup is selected.

[0097] The first sewing device 4 is disposed between the two conveyor belts. The first sewing device 4 is used to sew the reinforcing canvas piece B onto the base material piece A to form the reinforcing material piece. In this embodiment, the first sewing device 4 is a double-needle flat sewing machine.

[0098] See Figure 8 The second material box 5 is located on one side of the subsequent conveyor belt b. A receiving channel is formed inside the second material box 5. The receiving channel is used to receive vertically arranged hook and loop fasteners C. One end of the receiving channel has a discharge port facing the subsequent conveyor belt.

[0099] See Figures 8 to 10 As shown, the second feeder 6 is used to pick up the hook and loop fastener sheet C from the outlet of the second hopper 5 and place it on the reinforcing sheet on the subsequent conveyor belt b. The second feeder 6 is located on one side of the subsequent conveyor belt b.

[0100] Continue reading Figure 1 and Figure 8 The spot welding device 7 is located on the other side of the subsequent conveyor belt b. The spot welding device 7 is used to spot weld the hook and loop fastener piece C to the reinforcing sheet to form the initial assembly piece D. The spot welding device 7 is an ultrasonic spot welder. The spot welder temporarily locks the hook and loop fastener piece to the base sheet sewn with the reinforcing canvas piece by ultrasonic spot welding positioning. Ultrasonic spot welding creates hard spots. Because this product is a mop, not clothing, a small number of hard spots are permissible. This is more efficient than pre-positioning the sheet with sewing thread.

[0101] As a preferred implementation method, see [reference]. Figure 8As shown, a support m is mounted on the frame of the subsequent conveyor belt b. A second rotating shaft n is rotatably mounted on the support m, and a second gear o is coaxially mounted on the second rotating shaft n. A support p is mounted on the second rotating shaft n. The support p is positioned above the second gear o. A second cylinder r is mounted on the support m. The piston rod of the second cylinder r is coaxially connected to a second rack s. The second rack s meshes with the second gear s.

[0102] See Figure 11 The third material box 8, the first material box, and the second material box have the same structure. The difference between the three is that they are different in size. The sizes of the three are respectively adapted to the base material sheet (and the reinforcing canvas sheet), the Velcro sheet C, and the initial material sheet D. The third material box 8 has a receiving channel for accommodating the vertically arranged initial material sheet D, and a discharge port is opened at one end of the receiving channel.

[0103] The second sewing device 9 is located at the outlet of the third material box 8. The second sewing device 9 is equipped with a third feeder 91 for drawing the initial material sheet D from the outlet of the third material box 8 and placing it on the worktable of the second sewing device 9. The second sewing device 9 is also equipped with a folding mechanism 92 for flipping the outer edge of the initial material sheet D towards the inside of the initial material sheet D. After the outer edge of the initial material sheet D is folded inward, the second sewing device 9 sews the folded outer edge onto the initial material sheet D to form a stacked mop.

[0104] In this embodiment, the first, second, and third feeders have largely the same structure, see reference [link / reference] Figure 1 The first feeder includes two feeder units, the second feeder includes one feeder unit, and the third feeder includes two feeder units.

[0105] The difference lies in that the two picking units in the first picking device pick up and put down the base sheet and the reinforcing canvas sheet respectively, while the third picking device has an additional first limiting plate for folding at the end, which exacerbates the imbalance of the counterweight at the end. Therefore, the inertia of the mechanism needs to be balanced to make the movement smooth. Thus, two picking units are configured symmetrically with respect to the drive source.

[0106] In addition, the third feeder is equipped with two first limiting plates to limit the folding of the long side of the initial feed piece. The structures of the other first, second, and third feeders are the same, so the third feeder will be described below, and the structure of the second feeder will not be repeated here.

[0107] Specifically, the third feeder 91 includes: a crossbeam d, a slide bar e, a suction cup f, a first rotating shaft g, a drive mechanism and a first limiting plate j.

[0108] A crossbeam d is mounted on the conveyor belt frame. A guide sleeve is rotatably mounted on the crossbeam d. The guide sleeve is slidably fitted onto the middle of the slide rod e. A suction cup f is mounted on one end of the slide rod e. A first rotating shaft g is rotatably mounted on the crossbeam d and is located on the side of the first rotating shaft g away from the first material box 2. The central axis of the first rotating shaft g is aligned with the rotation line of the guide sleeve. A crank h is connected to the first rotating shaft g. The crank h is pivotally connected to the other end of the slide rod e. A drive mechanism for driving the first rotating shaft g is mounted on the crossbeam d.

[0109] There are two first limiting plates j. The two first limiting plates are set on opposite sides of the suction cup f. The position of the first limiting plates j is adjustable on the suction cup f. Specifically, the first limiting plates are installed on the suction cup via cylinders, jacks, and electro-hydraulic push rods.

[0110] After the suction cup f of the third feeder 91 picks up the initial material sheet D and places it on the worktable of the second sewing device 9, the first limiting plate j presses against the opposite sides of the initial material sheet D. There are four folding mechanisms 92, which are arranged in pairs opposite each other. The pair of folding mechanisms 92 located on the opposite sides of the two first limiting plates j flips the outer edge of the initial material sheet D upward toward the opposite side of the two first limiting plates j.

[0111] See Figures 11 to 15 As shown, a pair of folding mechanisms on opposite sides of the long side of the initial material sheet set on the workbench first flip the outer edge of the long side of the initial material sheet. Then, the two first limiting plates approach each other and extend from between the initial material sheet and the outer edge of the long side of the initial material sheet to the outside of the initial material sheet. The second sewing device is a computer pattern sewing machine, which sews the two Velcro pieces that press against the outer edge of the long side of the initial material sheet to the middle of the initial material sheet.

[0112] Then, refer to Figure 14 As shown, the third feeder releases the initial feed sheet, while a second limiting plate mounted on the worktable of the second sewing device presses down the short side of the initial feed sheet. A pair of folding mechanisms on opposite sides of the short side of the initial feed sheet on the worktable flip the outer edge of the short side of the initial feed sheet. Next, the two second limiting plates move closer together and extend from between the initial feed sheet and the outer edge of its short side to the outside of the initial feed sheet. The second sewing device then sews the outer edge of the short side of the initial feed sheet to the middle of the initial feed sheet to form a stacked mop.

[0113] Specifically, the folding mechanism 92 includes: a side plate k, a pressure plate t, and a folding cylinder t-2.

[0114] There are two side plates k. The side plates k are erected vertically on the worktable. The two side plates k are located on opposite sides of the initial loading station of the material sheet D on the worktable. The side plates k are provided with guide grooves.

[0115] In this embodiment, the guide chute adopts a zigzag shape with a rounded transition. The guide chute k-0 is set along the length or width direction of the workstation. The zigzag direction of the guide chute k-0 is oriented towards the worktable. The pressure plate t is attached to the worktable. Moving rods t-1 are connected to opposite ends of the pressure plate t. The moving rods t-1 slide in the guide chute k-0. The folding cylinder t-2 is installed on the side plate k. The folding cylinder t-2 is used to drive the sliding rod e.

[0116] In some embodiments, the guide groove has a similar inverted V-shaped structure.

[0117] This invention provides a method for sewing stacked mops using an automatic stacked mop sewing device, comprising the following steps:

[0118] S1: Multiple base material sheets A and multiple reinforcing canvas sheets B are respectively placed in the measuring and receiving channels of the first material box 2, such that the multiple base material sheets A are arranged along the length direction of one receiving channel and the base material sheets A are arranged vertically, and the multiple reinforcing canvas sheets B are arranged along the length direction of another receiving channel and the reinforcing canvas sheets B are arranged vertically.

[0119] S2: Take the first base material piece A and place it on the input end of the preceding conveyor belt a.

[0120] S3: The first feeder 3 picks up the second base sheet A and the first reinforcing canvas sheet B from the discharge port of the first material box 2 and places them on the front conveyor belt a, so that the first reinforcing canvas sheet B overlaps with the first base sheet A.

[0121] S4: The output end of the preceding conveyor belt a continuously transports the stacked base material A and reinforcing canvas B to the worktable of the first sewing device 4.

[0122] S5: The first sewing device 4 sews the reinforcing canvas piece B onto the base material piece A to form a reinforcing piece and pushes it to the input end of the subsequent conveyor belt b.

[0123] S6: The second feeder 6 picks up the hook and loop fastener sheet C from the outlet of the second hopper 5 and places it on the reinforcing sheet on the subsequent conveyor belt b.

[0124] S7: Spot welding device 7 spot welds the Velcro patch C to the reinforcing sheet to form the initial assembly sheet D.

[0125] S8: Load the initial material sheet D into the receiving channel of the third material box 8.

[0126] S9: The third feeder 91 picks up the initial material sheet D from the outlet of the third material box 8 and places it on the worktable of the second sewing device 9.

[0127] S10: The folding mechanism 92 flips the outer edge of the initial loading sheet D toward the inside of the initial loading sheet D, and the outer edge of the initial loading sheet D fits into the middle of the initial loading sheet D.

[0128] After the third feeder places the initial material sheet onto the worktable of the second sewing device, the pressure plate is positioned below the initial material sheet, while the first limiting plate presses against the top of the initial material sheet. The pressure plate and the first limiting plate are offset, with the pressure plate positioned on opposite sides of the two first limiting plates. Then, as the cylinder pushes the slide rod along the length of the guide groove in a rising and then falling motion, the pressure plate first lifts the outer edge of the initial material sheet. Due to the pressure of the first limiting plate (or the second limiting plate), the outer edge of the initial material sheet can bypass the first limiting plate (or the second limiting plate) and adhere to the initial material sheet. After the first limiting plate (or the second limiting plate) retracts from the outer edge of the initial material sheet, the second sewing device sequentially sews the long outer edge and the end outer edge of the initial material sheet onto the initial material sheet.

[0129] S11: The second sewing device 9 sews the folded outer edge onto the initial fabric piece D to form a stacked mop.

[0130] Traditional base sheet, reinforced canvas sheet, Velcro sheet, and initial loading sheet are all thin sheet materials. The general gripping method is a long-range C-shaped method, which involves stacking the materials together horizontally, grabbing one sheet, lifting it up, and then moving it horizontally out. At the same time, the material stack automatically rises to the gripping position, then moves down and is placed on the worktable, and then the gripper returns to its original position.

[0131] Traditional picking and placing methods also have disadvantages: First, their picking and placing efficiency is low compared to manual picking (the paths are separate); second, when replenishing materials, the grab handles are in the way and cannot be used for synchronous operation, or if it is to be made so that it can avoid obstacles and be used for synchronous operation, then a mechanism needs to be added.

[0132] The materials used in this invention have unique characteristics. The base material, reinforcing thin canvas, and Velcro sheet are all flat, lightweight materials, belonging to the fabric category. They are deformable and easy to separate when stacked. Therefore, the first, second, and third pickers (i.e., the picking unit) of this invention are used for picking and placing: the materials are stacked and placed at an angle, with a very narrow partition blocking the discharge port of the material box at the front and bottom. The material is first grabbed, and through a specific linkage mechanism, the material can be deformed and can be carried away through a slightly smaller discharge port. Then, it follows a herringbone trajectory to place the material directly downwards onto the conveyor belt. The advantages of this picking and placing method are: firstly, the linkage mechanism is single-drive, and the continuity of a single stroke is better than the aforementioned traditional C-type picking and placing, thus increasing the speed. Secondly, the material is placed at an angle, allowing for replenishment from the upper rear at any time without interfering with the gripper.

[0133] On the other hand, the material requiring hemming in this invention (initial fabric sheet) is a blend of sponge and fabric, which is fluffy, elastic, and thick (relative to clothing fabrics). It is relatively large (340mm long, 200mm wide), making manual hemming impossible in a single operation. For automatic hemming, a thin plate (first and second limiting plates) is first pressed down on the top and inside of the material to define the hemming position; then, another plate (pressure plate) is used on the outside for hemming. The material must first partially cover the edge of the outer folding plate. The folding plate is angled upwards and inwards a short distance, using its upper side to fold up the edge of the material; then it is angled downwards and inwards, using its lower side to press down the material. At this point, the pressure plate presses down on the upper fold of the material, the upper fold presses down on the inner thin plate, and the inner thin plate presses down on the bottom surface of the material. Obviously, further back, the previously inner thin plate retracts. Otherwise, it is impossible to sew. First, continue to move inwards to disengage the material from under the folding plate, and then pull the entire material away from the folding device. Finally, this folding device acts as the presser foot of the pattern sewing machine (the presser plate has a slit for the pattern sewing machine's needle to pass through), allowing for continuous sewing of the material.

[0134] The upper side of the pressure plate is tilted upwards and the lower side is tilted downwards and pressed flat.

[0135] A unique feature of this invention is that, unlike typical hemming of thin fabrics, the hemming here is not achieved through rotation. If a baffle were used for rotational hemming, thicker, more elastic materials would noticeably rebound at the crease, requiring an additional action—the installation of a push-positioning plate—to correct this, thus increasing structural complexity. Even more problematic is the contradiction that, with the material already pressed down by the rotating plate, positioning the crease using the push-out plate presents both the risk of insufficient push-in and the risk of the material being punctured even after push-in.

[0136] The automatic sewing equipment and sewing method for stacked mops of the present invention adopts an assembly line production method to prepare stacked mops. On the one hand, it reduces the workload and intensity of workers, and on the other hand, it improves the level of automation of the operation, thereby significantly increasing production capacity without increasing the number of workers.

[0137] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A stacked toweling automatic sewing apparatus, characterized by, include: Two conveyor belts spaced apart, each conveyor belt having an input end and an output end; The first material box is located on one side of the preceding conveyor belt. The first material box has two receiving channels for respectively accommodating the vertically arranged bottom material sheet and the reinforcing canvas sheet. One end of the receiving channel is provided with a discharge port facing the preceding conveyor belt. A first feeder for picking up the bottom sheet and the reinforcing canvas sheet from the outlet of the first hopper and placing them on the front conveyor belt is located on the other side of the front conveyor belt. A first sewing device for sewing the reinforcing canvas sheet onto the base sheet to form the reinforcing sheet is disposed between the two conveyor belts; The second material box is located on one side of the rear conveyor belt. The second material box has a receiving channel for accommodating vertically arranged hook and loop fasteners. One end of the receiving channel has a discharge port facing the rear conveyor belt. A second feeder, used to pick up the Velcro sheet from the outlet of the second feed hopper and place it on the reinforcing sheet on the subsequent conveyor belt, is located on one side of the subsequent conveyor belt. A spot welding device for spot welding the hook and loop fastener to the reinforcing sheet to form a pre-assembled sheet is located on the other side of the subsequent conveyor belt. The third material box has a receiving channel for accommodating the vertically arranged initial loading material pieces, and a discharge port is opened at one end of the receiving channel. A second sewing device is installed at the outlet of the third material box. The second sewing device is equipped with a third material picker for picking up the initial material sheet from the outlet of the third material box and placing it on the worktable of the second sewing device. The second sewing device is also equipped with a folding mechanism for flipping the outer edge of the initial material sheet toward the inside of the initial material sheet. After the outer edge of the initial material sheet is folded inward, the second sewing device sews the folded outer edge onto the initial material sheet to form a stacked mop.

2. The automatic lamination and mopping cloth sewing apparatus according to claim 1, wherein The outer side of the conveyor belt has multiple partitions, and a positioning space is formed between two adjacent partitions.

3. The automatic lamination and mopping cloth sewing apparatus according to claim 1, wherein The receiving channel is inclined, and the discharge port is located at the lower end of the receiving channel.

4. The automatic lamination and mopping cloth sewing apparatus according to claim 3, wherein A pusher is slidably installed inside the receiving channel.

5. The automatic lamination and mopping cloth sewing apparatus according to claim 1, wherein The third feeder includes: A crossbeam is mounted on the frame of the conveyor belt, and a guide sleeve is rotatably installed on the crossbeam; A sliding rod, wherein the guide sleeve is slidably sleeved on the middle part of the sliding rod; A suction cup is installed at one end of the slide rod; The first rotating shaft is rotatably mounted on the crossbeam and located on the side of the first rotating shaft away from the first material box. The central axis of the first rotating shaft is arranged in the same direction as the first rotating axis of the guide sleeve. The first rotating shaft is connected to a crank, which is pivotally connected to the other end of the slide rod. A drive mechanism for driving the first rotating shaft is mounted on the crossbeam.

6. The automatic lamination and mopping cloth sewing apparatus according to claim 5, wherein The drive mechanism includes: The first gear is coaxially mounted on the first rotating shaft; A first cylinder is mounted on the crossbeam, and the piston rod of the first cylinder is coaxially connected to a first rack, which meshes with the first gear.

7. The automatic lamination and mopping cloth sewing apparatus according to claim 5, wherein The third feeder also includes two first limiting plates disposed on opposite sides of the suction cup. The first limiting plates are tunably mounted on the suction cup. After the suction cup of the third feeder picks up the initial material sheet and places it on the worktable of the second sewing device, the first limiting plates press against opposite sides of the initial material sheet. The number of folding mechanisms is four, with each pair of folding mechanisms facing each other. One pair of folding mechanisms disposed on the opposite sides of the two first limiting plates flips the outer edge of the initial material sheet upward toward the opposite side of the two first limiting plates.

8. The automatic lamination and mopping cloth sewing apparatus according to claim 7, wherein The folding mechanism includes: Two side plates are vertically mounted on the workbench. The two side plates are located on opposite sides of the initial loading material station on the workbench. The side plates are provided with zigzag guide grooves with arc transitions. The guide grooves are arranged along the length or width of the station, and the zigzag direction of the guide grooves is directed toward the workbench. A pressure plate is attached to the worktable, and movable rods are connected to opposite ends of the pressure plate. The movable rods are slidably disposed in the guide groove. A folding cylinder for driving the slide bar is mounted on the side plate.

9. The automatic lamination and mopping cloth sewing apparatus according to claim 1, wherein The frame of the downstream conveyor belt is equipped with a support, and the support is mounted on a rotatable second shaft. A second gear is coaxially mounted on the second shaft, and a support is mounted on the second shaft. The support is positioned above the second gear. A second cylinder is mounted on the support, and the piston rod of the second cylinder is coaxially connected to a second rack, which meshes with the second rack.

10. A method for sewing a stacked mop using an automatic sewing device for stacked mops as described in any one of claims 1 to 9, characterized in that, Includes the following steps: Multiple base material sheets and multiple reinforcing canvas sheets are respectively placed in the measuring and receiving channels of the first material box, such that the multiple base material sheets are arranged along the length direction of one receiving channel and the base material sheets are arranged vertically, and the multiple reinforcing canvas sheets are arranged along the length direction of another receiving channel and the reinforcing canvas sheets are arranged vertically. Take the first base material sheet and place it on the input end of the preceding conveyor belt; The first feeder picks up the second base sheet and the first reinforcing canvas sheet from the outlet of the first material box and places them on the front conveyor belt, so that the first reinforcing canvas sheet overlaps the first base sheet; The output end of the preceding conveyor belt continuously transports the stacked base sheet and reinforcing canvas sheet to the worktable of the first sewing device; The first sewing device sews the reinforcing canvas sheet onto the base material sheet to form a reinforcing sheet and pushes it to the input end of the subsequent conveyor belt; The second feeder picks up the Velcro sheet from the outlet of the second hopper and places it on the reinforcing sheet on the downstream conveyor belt; The spot welding device spot welds the Velcro patch to the reinforcing sheet to form the initial assembly sheet; The initial batch of material is loaded into the receiving channel of the third material box; The third feeder picks up the initial material sheet from the outlet of the third material box and places it on the worktable of the second sewing device; The folding mechanism flips the outer edge of the initial assembly sheet toward the inside of the initial assembly sheet, and the outer edge of the initial assembly sheet is attached to the middle of the initial assembly sheet; The second sewing device sews the folded outer edge onto the initial packing sheet to form a stacked mop.

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