A multi-threaded sheet stacking device

Abstract

The present application relates to the technical field of sheet material stacking, in particular to a sheet material multi-thread stacking device, comprising a rack, the rack being provided with a movable table capable of sliding in the horizontal direction, the movable table being provided with a mounting frame capable of lifting, at least two groups of vacuum suction mechanisms being provided on the mounting frame, each vacuum suction mechanism comprising a vacuum suction cup and a gas pump, the vacuum suction cup being connected with a connecting pipe, the connecting pipe being telescopically arranged on the mounting frame and being in communication with the gas pump through the connecting pipe, a communication mechanism for controlling the communication of the connecting pipe being provided on the mounting frame, the connecting pipe being in a reset state when it is elongated to the limit position, at which time the communication mechanism blocks the communication between the connecting pipe and the gas pump, the connecting pipe being in a contraction state after being contracted, at which time the communication mechanism communicates the connecting pipe and the gas pump. The present application realizes the function of automatically sucking sheet materials according to the number and specifications of the sheet materials, and solves the problem of deformation of sheet materials caused by uneven stress during the transfer of sheet materials.

Description

Technical Field

[0001] This invention relates to the field of sheet metal stacking technology, specifically to a multi-threaded sheet metal stacking device. Background Technology

[0002] SPC (Stone Plastic Composite) flooring is a new type of floor decoration material. During processing, the boards need to be stacked for convenient transportation and packaging. However, during transportation, large boards are prone to deformation such as chipping or warping if the stress is uneven, affecting the quality of the boards.

[0003] To this end, Chinese Patent No. CN218707231U discloses a metal sheet stacking device, which uses a lifting cylinder to control the lower end of the suction cup to adhere to the upper surface of the metal sheet. By using the suction cup to adhere to the upper surface of the metal sheet, the middle of the metal sheet is kept in a lifted and fixed state during the transfer process, thus avoiding the phenomenon of the middle of the metal sheet falling off due to the large size of the metal sheet.

[0004] However, when transferring multiple types of boards or transporting multiple boards at once, the existing transfer devices have limited adaptability and cannot adjust the appropriate adsorption position according to the size and quantity of the boards. As a result, the boards may deform due to uneven stress during transportation, or even fall off and fail to be transferred smoothly. Summary of the Invention

[0005] To address the aforementioned issues, a multi-threaded stacking device for sheet metal is provided. This device solves the problem of deformation caused by uneven stress on the sheet metal during the transfer process by using a frame, a vacuum adsorption mechanism, and a connecting mechanism.

[0006] To address the problems of existing technologies, this invention provides a multi-threaded stacking device for sheet metal, including a frame with a movable platform that can slide horizontally on the frame, and a lifting mounting frame on the movable platform. The mounting frame has at least two sets of vacuum adsorption mechanisms, each including a vacuum suction cup and an air pump. The vacuum suction cup is connected to a connecting pipe, which is telescopically mounted on the mounting frame, and the vacuum suction cup is connected to the air pump via the connecting pipe. The mounting frame has a connecting mechanism for controlling the connection of the connecting pipe. When the connecting pipe extends to its limit position, it is in a reset state, at which point the connecting mechanism blocks the connection between the connecting pipe and the air pump. When the connecting pipe retracts, it is in a retracted state, at which point the connecting mechanism connects the connecting pipe and the air pump.

[0007] Preferably, the connecting mechanism includes a buffer chamber and a transmission assembly that communicate with the connecting pipe; the buffer chamber is mounted on the mounting frame, and the top of the buffer chamber is provided with an air pipe for connecting to the air pump. A movable valve plate for sealing the air pipe is installed inside the buffer chamber and can be raised and lowered; the movable valve plate is connected to the connecting pipe through the transmission assembly.

[0008] Preferably, the mounting bracket is provided with a control mechanism, which includes a locking component for limiting the resetting of the connecting pipe and a pneumatic control component for controlling the opening and closing of the locking component. The pneumatic control component is connected to an air pump.

[0009] Preferably, the portion of the connecting pipe located inside the buffer chamber is provided with a limiting plate, and the movable valve plate is provided with a first elastic element for pushing the limiting plate to reset.

[0010] Preferably, a partition is provided at the end of the connecting tube away from the vacuum suction cup. The periphery of both the partition and the limiting plate is tightly fitted with the inner wall of the buffer chamber. The limiting plate is provided with micro-holes for gas to pass through. The partition separates the buffer chamber into a buffer chamber that is connected to the outside gas.

[0011] Preferably, the movable valve plate is provided with a distance sensor for detecting the distance between the movable valve plate and the top inner wall of the buffer chamber.

[0012] Preferably, the transmission assembly includes an extension rod, a connecting plate, a rack, and a rotating gear; the extension rod is connected to the movable valve plate; the connecting plate is connected to the connecting pipe; there are two racks, which are respectively connected to the extension rod and the connecting plate; the rotating gear is rotatably mounted on the buffer chamber, and both racks are connected to the rotating gear for transmission.

[0013] Preferably, the locking assembly includes a mounting base and a locking block; the mounting base is disposed on a mounting frame; the locking block is slidably mounted on the mounting base and is connected to the pneumatic control assembly for transmission; a slot is provided on the connecting pipe to cooperate with the locking block; when the locking block is inserted into the slot, the connecting pipe is restricted from resetting.

[0014] Preferably, when the card block is reset, it separates from the card slot and is in a retracted state. The mounting base is provided with a second elastic element for controlling the reset of the card block. The two ends of the second elastic element are respectively connected to the card block and the mounting base.

[0015] Preferably, the pneumatic control assembly includes a pressure chamber and a connecting rod; the pressure chamber is mounted on a mounting base, and the end of the pressure chamber away from the mounting base has an opening; the connecting rod is slidably mounted on the mounting base and connected to a locking block, and the end of the connecting rod away from the locking block has a piston that fits tightly against the inner wall of the pressure chamber; the piston isolates a negative pressure chamber in the pressure chamber, and the negative pressure chamber is connected to the connecting pipe through a pipeline.

[0016] The advantages of this invention compared to the prior art are:

[0017] 1. This invention achieves automatic adsorption of sheet metal based on quantity and specifications through a frame, vacuum adsorption mechanism, and connecting mechanism. During multi-threaded synchronous transport, the vacuum suction cups abut against the sheet metal surface, compressing the connecting pipe. The connecting mechanism connects the vacuum suction cups and the air pump, thereby adsorbing the sheet metal. Vacuum suction cups not in contact with the sheet metal do not perform adsorption, thus adapting to different specifications and quantities of sheet metal and enabling multi-threaded synchronous transport of multiple sheet metals. Through the cooperation of multiple sets of vacuum adsorption mechanisms, when transporting large-sized sheet metals or multiple sheet metals simultaneously, unstable adsorption of the sheet metal can be avoided, thereby solving the problem of deformation caused by uneven force on the sheet metal during transport.

[0018] 2. This invention achieves the function of controlling the connection between the connecting pipe and the air pump through a buffer chamber, air pipe, movable valve plate, and transmission assembly. The movable valve plate's raising and lowering controls the air pipe, thereby sealing and connecting the buffer chamber, and ultimately controlling the connection between the vacuum suction cup and the air pump. Furthermore, the movable valve plate is connected to the connecting pipe via the transmission assembly. When the vacuum suction cup is compressed and the connecting pipe contracts, the connecting pipe, through the transmission assembly, controls the movable valve plate to move downwards, thus connecting the vacuum suction cup and the air pump. The air pump then provides negative pressure to adsorb the sheet material.

[0019] 3. This invention achieves the function of preventing the connecting tube from resetting during the transfer of sheet metal through a locking component and a pneumatic control component. If the connecting tube resets due to shaking during transfer, the movable valve plate will close the air pipe, thereby disconnecting the vacuum suction cup from the air pump, causing the vacuum suction cup to lose its suction force and the sheet metal to fall off. Therefore, a locking component is provided to prevent the connecting tube from resetting and maintain the suction force of the vacuum suction cup on the sheet metal. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of a multi-threaded stacking device for sheet metal according to the present invention.

[0021] Figure 2 This is a three-dimensional schematic diagram of the mounting frame and vacuum adsorption mechanism in a multi-threaded stacking device for sheet metal according to the present invention.

[0022] Figure 3 This is a three-dimensional schematic diagram of a single vacuum adsorption mechanism in a multi-threaded stacking device for sheet metal according to the present invention.

[0023] Figure 4 This is a three-dimensional schematic diagram of the internal structure of the buffer chamber, the transmission components, and the control mechanism in a multi-threaded stacking device for sheet metal according to the present invention.

[0024] Figure 5 This is the invention Figure 4 A magnified view of a portion of point A in the middle.

[0025] Figure 6This is a three-dimensional schematic diagram of the vacuum suction cup, the connecting mechanism, and the control mechanism in the reset state of the connecting tube in a multi-threaded stacking device for sheet metal according to the present invention.

[0026] Figure 7 This is a three-dimensional schematic diagram of the vacuum suction cup, the connecting mechanism, and the control mechanism in a multi-threaded stacking device for sheet metal according to the present invention, with the connecting tube in a retracted state.

[0027] Figure 8 This is a three-dimensional schematic diagram of the connecting pipe and control mechanism in a multi-threaded stacking device for sheet metal according to the present invention.

[0028] Figure 9 This is a three-dimensional schematic diagram of the control mechanism in a multi-threaded stacking device for sheet metal according to the present invention.

[0029] Figure 10 This is a three-dimensional schematic diagram of the internal structure of the buffer chamber in a multi-threaded stacking device for sheet metal according to the present invention.

[0030] The diagram is labeled as follows: 1. Frame; 11. Movable table; 111. Mounting frame; 12. Idler roller conveyor line; 13. Storage platform; 2. Vacuum adsorption mechanism; 21. Vacuum suction cup; 211. Connecting pipe; 212. Limiting plate; 2121. Micro-hole; 213. Partition plate; 22. Air pump; 3. Connecting mechanism; 31. Buffer chamber; 311. Air pipe; 312. Movable valve plate; 3121. First elastic element; 32. 321. Transmission assembly; 322. Extension rod; 323. Connecting plate; 324. Rack; 325. Rotary gear; 326. Shaft; 327. Pulley; 328. Synchronous belt; 4. Control mechanism; 41. Locking assembly; 411. Mounting base; 412. Locking block; 413. Locking slot; 414. Second elastic element; 42. Pneumatic control assembly; 421. Pressure chamber; 422. Connecting rod; 4221. Piston. Detailed Implementation

[0031] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0032] Reference Figures 1-3A multi-threaded sheet metal stacking device includes a frame 1, a movable platform 11 that can slide horizontally on the frame 1, and a lifting mounting frame 111 on the movable platform 11. The mounting frame 111 has at least two sets of vacuum adsorption mechanisms 2, each including a vacuum suction cup 21 and an air pump 22. The vacuum suction cup 21 is connected to a connecting pipe 211, which is telescopically mounted on the mounting frame 111. The vacuum suction cup 21 is connected to the air pump 22 via the connecting pipe 211. The mounting frame 111 has a connecting mechanism 3 for controlling the connection of the connecting pipe 211. When the connecting pipe 211 extends to its limit position, it is in a reset state, at which point the connecting mechanism 3 blocks the connection between the connecting pipe 211 and the air pump 22. When the connecting pipe 211 retracts, it is in a retracted state, at which point the connecting mechanism 3 connects the connecting pipe 211 and the air pump 22.

[0033] This invention achieves automatic adsorption of sheet metal based on quantity and specifications through a frame 1, a vacuum adsorption mechanism 2, and a connecting mechanism 3. During multi-threaded synchronous transport, the vacuum suction cup 21 abuts against the sheet metal surface, compressing the connecting pipe 211. The connecting mechanism 3 connects the vacuum suction cup 21 and the air pump 22, thereby adsorbing the sheet metal. Vacuum suction cups 21 not in contact with the sheet metal do not perform adsorption, thus adapting to different specifications and quantities of sheet metal and enabling multi-threaded synchronous transport of multiple sheets. Through the cooperation of multiple sets of vacuum adsorption mechanisms 2, unstable adsorption of sheet metal can be avoided when transporting large-sized sheets or multiple sheets simultaneously, thereby solving the problem of deformation caused by uneven force during sheet metal transport. A roller conveyor line 12 for transporting sheet metal is provided below the frame 1, and a platform 13 for supporting sheet metal is provided on one side of the frame 1. The movable table 11 is equipped with a linear drive for controlling the lifting and lowering of the mounting frame 111, and the movable table 11 also has a built-in moving component for controlling the horizontal movement of the movable table 11 on the frame 1. The sheet metal on the roller conveyor line 12 is stacked onto the storage table 13 by the movable table 11 and the vacuum adsorption mechanism 2.

[0034] In operation, multiple sheets are first conveyed to the picking position via the roller conveyor 12. Then, the mounting frame 111 is driven downward by the linear driver, and the vacuum suction cup 21 contacts the sheet. After the vacuum suction cup 21 comes into contact with the sheet, it is compressed by the reaction force, causing the connecting tube 211 to change from the reset state to the contracted state. The connecting mechanism 3 controls the connection between the connecting tube 211 and the air pump 22, which then provides negative pressure, causing the vacuum suction cup 21 to adsorb the sheet. This ensures that only the vacuum suction cup 21 whose projection along the vertical direction is located at the sheet position is activated and adsorbs the sheet, achieving the effect of adapting to different sheet sizes. When transporting multiple sheets at once, it can also stably adsorb the sheets according to their size and position. After adsorption is completed, the mounting frame 111 is driven to move upward by the linear driver on the movable table 11. The mounting frame 111 lifts the board material by the vacuum suction cup 21. Then, the movable table 11 is moved above the storage platform 13 by the moving component built into the movable table 11. Then, the mounting frame 111 is lowered, and the adsorption of the board material is canceled, and the board material is stacked on the storage platform 13.

[0035] Reference Figures 2-4 The connecting mechanism 3 includes a buffer chamber 31 connected to the connecting pipe 211 and a transmission assembly 32. The buffer chamber 31 is mounted on the mounting frame 111. The top of the buffer chamber 31 is provided with an air pipe 311 for connecting to the air pump 22. The buffer chamber 31 is equipped with a movable valve plate 312 for sealing the air pipe 311. The movable valve plate 312 is connected to the connecting pipe 211 through the transmission assembly 32.

[0036] This invention achieves the function of controlling the connection between the connecting pipe 211 and the air pump 22 through the buffer chamber 31, air pipe 311, movable valve plate 312, and transmission assembly 32. The movable valve plate 312 is raised and lowered to close the air pipe 311, thereby achieving the purpose of closing and connecting the buffer chamber 31, and thus controlling the connection between the vacuum suction cup 21 and the air pump 22. The movable valve plate 312 is connected to the connecting pipe 211 through the transmission assembly 32. When the vacuum suction cup 21 is compressed and the connecting pipe 211 contracts, the connecting pipe 211 controls the movable valve plate 312 to move downwards through the transmission assembly 32, thereby connecting the vacuum suction cup 21 and the air pump 22. The air pump 22 provides negative pressure to adsorb the sheet material. In the working state, after the vacuum suction cup 21 contacts the sheet material, it is compressed upon contact, and under this compression, the connecting pipe 211 is pushed, causing it to change from a reset state to a contracted state. During this process, the connecting pipe 211 moves upward relative to the buffer chamber 31, and drives the movable valve plate 312 downward through the transmission assembly 32, so that the movable valve plate 312 separates from the air pipe 311 and no longer blocks the air pipe 311. The vacuum suction cup 21 is connected to the air pump 22 through the connecting pipe 211 and the buffer chamber 31, and then the air pump 22 provides negative pressure, so that the vacuum suction cup 21 adsorbs the sheet material.

[0037] Reference Figure 4 , Figures 6-8 The mounting bracket 111 is provided with a control mechanism 4, which includes a locking component 41 for limiting the reset of the connecting pipe 211 and a pneumatic control component 42 for controlling the opening and closing of the locking component 41. The pneumatic control component 42 is connected to the air pump 22.

[0038] This invention utilizes a locking component 41 and a pneumatic control component 42 to prevent the connecting tube 211 from resetting during sheet material transfer. If the connecting tube 211 resets due to shaking during transfer, the movable valve plate 312 will close the air pipe 311, thereby disconnecting the vacuum suction cup 21 from the air pump 22, causing the vacuum suction cup 21 to lose its suction force and the sheet material to fall off. Therefore, the locking component 41 is provided to prevent the connecting tube 211 from resetting, maintaining the suction force of the vacuum suction cup 21 on the sheet material. When the vacuum suction cup 21 is compressed by the sheet material, causing the connecting tube 211 to contract, the connecting tube 211 controls the movable valve plate 312 to move downwards via the transmission component 32, thus no longer blocking the air pipe 311. At this time, the air pump 22 provides negative pressure, and the pneumatic control component 42, connected to the air pump 22, is also subjected to negative pressure, thereby controlling the locking component 41 to activate. At this point, the vacuum suction cup 21 has just adsorbed the sheet material and is still in a contracted state. Next, the linear actuator on the movable table 11 drives the mounting bracket 111 to move upward and lift the sheet metal. During this process, the gravity of the sheet metal acts on the vacuum suction cup 21, which moves downward under the pull, causing the connecting tube 211 to extend. However, the connecting tube 211 is subject to the locking component 41, which restricts the connecting tube 211 from further elongating before it approaches the reset state, thus preventing the vacuum suction cup 21 from losing its suction force.

[0039] Reference Figure 4 and Figure 10 The portion of the connecting pipe 211 located inside the buffer chamber 31 is provided with a limiting plate 212, and the movable valve plate 312 is provided with a first elastic element 3121 for pushing the limiting plate 212 to reset.

[0040] This invention achieves the function of automatically resetting the connecting tube 211 after transfer is completed through the limiting plate 212 and the first elastic element 3121. The limiting plate 212 on the connecting tube 211 restricts the extension range of the connecting tube 211. When the connecting tube 211 is in the reset state, the limiting plate 212 abuts against the inner wall of the buffer chamber 31 under the elastic force of the first elastic element 3121. When the transfer is completed, the air pump 22 no longer provides negative pressure, the vacuum suction cup 21 no longer adsorbs the sheet material, and the sheet material falls onto the platform 13, completing the stacking action. At this time, the start control component is no longer subject to negative pressure, thereby canceling the resetting restriction of the connecting tube 211 by the locking component 41. The limiting plate 212 on the connecting tube 211 moves under the elastic force of the first elastic element 3121, thereby driving the connecting tube 211 and the vacuum suction cup 21 to reset, so as to facilitate the transfer action again.

[0041] Reference Figure 4 , Figure 8 and Figure 10 The end of the connecting tube 211 away from the vacuum suction cup 21 is provided with a partition 213. The periphery of the partition 213 and the limiting plate 212 are tightly fitted with the inner wall of the buffer chamber 31. The limiting plate 212 is provided with a micro hole 2121 for gas to pass through. The partition 213 separates a buffer chamber in the inner cavity of the buffer chamber 31 that is connected to the outside gas.

[0042] This invention utilizes the micro-holes 2121 on the partition 213 and the limiting plate 212 to provide damping during the extension and retraction of the connecting tube 211. The buffer cavity within the buffer chamber 31, separated by the partition 213, provides a buffering effect during the extension and retraction of the connecting tube 211. When the vacuum suction cup 21 contacts the sheet material and the air pump 22 generates negative pressure, the sheet material is adsorbed by the vacuum suction cup 21. The side of the partition 213 near the buffer cavity is connected to the outside, where the air pressure is close to atmospheric pressure, while the side away from the buffer cavity is under negative pressure. Therefore, the partition 213 experiences air pressure away from the buffer cavity under pressure, causing the connecting tube 211 to tend to contract. Meanwhile, the linear actuator on the movable table 11 drives the mounting bracket 111 upwards, lifting the sheet material through the vacuum suction cup 21. Under gravity, the connecting tube 211 extends. The locking component 41 prevents the connecting tube 211 from reaching the reset state. The negative pressure also limits the extension of the connecting tube 211. During the elongation of the connecting pipe 211, gas exchange occurs between the upper and lower spaces of the buffer chamber located on the limiting plate 212. The gas exchange rate is limited by the micro-holes 2121, thereby creating a buffer through the gas and preventing the sheet material from rising and falling rapidly. This further improves the stability of the sheet material transportation, prevents rapid shaking of the sheet material, and thus prevents deformation of the sheet material under shaking, ensuring the quality of the sheet material.

[0043] Reference Figure 4The movable valve plate 312 is equipped with a distance sensor for detecting the distance between the movable valve plate 312 and the top inner wall of the buffer chamber 31.

[0044] This invention utilizes a distance sensor to detect the position of the movable valve plate 312. During material transfer, the position of the movable valve plate 312 determines the weight of the material plate, thereby adjusting the negative pressure provided by the air pump 22 and the suction force of the vacuum suction cup 21. When the material plate is heavy, sufficient suction force is provided to stabilize the transfer. The distance sensor is electrically connected to the controller. After the vacuum suction cup 21 adsorbs the material plate, a linear actuator on the movable stage 11 drives the mounting frame 111 and the vacuum suction cup 21 to move upwards. Under the weight of the material plate, the vacuum suction cup 21 and the connecting pipe 211 move downwards relative to the mounting frame 111, while the partition plate 213, under air pressure, hinders its downward movement. As the connecting pipe 211 moves downwards, it drives the movable valve plate 312 upwards via the transmission assembly 32. The distance sensor then determines the movement of the movable valve plate 312 by judging the equidistant distance between it and the inner top wall of the buffer chamber 31. The negative pressure is adjusted based on the movement to stabilize the adsorption of the material plate.

[0045] Reference Figures 3-5 The transmission assembly 32 includes an extension rod 321, a connecting plate 322, a rack 323, and a rotating gear 324. The extension rod 321 is connected to the movable valve plate 312. The connecting plate 322 is connected to the connecting pipe 211. There are two racks 323, which are respectively connected to the extension rod 321 and the connecting plate 322. The rotating gear 324 is rotatably mounted on the buffer chamber 31, and both racks 323 are connected to the rotating gear 324 for transmission.

[0046] This invention achieves the function of driving the movable valve plate 312 to move when the connecting pipe 211 moves through the extension rod 321, connecting plate 322, rack 323, and rotating gear 324. Two rotating gears 324 are provided, and two rotating shafts 325 are rotatably mounted on the outer wall of the buffer chamber 31. The two rotating shafts 325 are connected by a pulley 326 and a synchronous belt 327. When the connecting pipe 211 moves, it drives the connecting plate 322 to move. The rack 323 on the connecting plate 322 drives the rotating gear 324 meshing with it to rotate. This rotating gear 324 drives the other rotating gear 324 to rotate synchronously through the pulley 326 and the synchronous belt 327, thereby driving the rack 323 connected to the extension rod 321 to move, and thus driving the extension rod 321 and the movable valve plate 312 to move.

[0047] Reference Figures 6-9The locking assembly 41 includes a mounting base 411 and a locking block 412. The mounting base 411 is mounted on the mounting bracket 111. The locking block 412 is slidably mounted on the mounting base 411 and is connected to the pneumatic control assembly 42. The connecting pipe 211 has a slot 413 that mates with the locking block 412. When the locking block 412 is inserted into the slot 413, the connecting pipe 211 is restricted from resetting.

[0048] This invention achieves the function of restricting the repositioning of the connecting tube 211 through the mounting base 411, the locking block 412, and the locking groove 413. The locking block 412 has an arc-shaped surface on the side near the vacuum suction cup 21. During transport, the vacuum suction cup 21 and the connecting tube 211 elongate under the force of gravity on the sheet metal. During this elongation, when the locking block 412 aligns with the locking groove 413, the locking block 412 slides towards the locking groove 413 under the torque provided by the pneumatic control component 42, thus engaging with the locking groove 413. When the connecting tube 211 contracts under force, the arc-shaped surface of the locking block 412 presses against the inner wall of the locking groove 413, compressing the locking block 412 into the mounting base 411, separating the locking block 412 from the locking groove 413. This ensures that the locking block 412 only restricts the repositioning of the connecting tube 211 without affecting its contraction. After the locking block 412 engages with the locking groove 413, it stabilizes the position of the connecting tube 211. Only when the connecting tube 211 is subjected to a large force can it push the locking block 412 to reset and control the contraction of the connecting tube 211.

[0049] Reference Figure 8 and Figure 9 When the card block 412 is reset, it separates from the card slot 413 and is in a retracted state. The mounting base 411 is provided with a second elastic element 414 for controlling the reset of the card block 412. The two ends of the second elastic element 414 are respectively connected to the card block 412 and the mounting base 411.

[0050] This invention utilizes a second elastic element 414 to achieve the function of automatically resetting the locking block 412 when the vacuum suction cup 21 is not under negative pressure. To ensure smooth resetting of the connecting tube 211, when the vacuum suction cup 21 is not adsorbing the sheet material, the pneumatic control component 42 will not be pushed by negative pressure. At this time, the locking block 412 retracts completely into the mounting base 411 under the elastic force of the second elastic element 414, thus preventing the locking block 412 from contacting the connecting tube 211. Even if the locking block 412 aligns with the slot 413, it will not insert into the slot 413. This allows the connecting tube 211 and the vacuum suction cup 21 to smoothly reset under the elastic force of the first elastic element 3121, facilitating subsequent adsorption and transfer operations.

[0051] Reference Figure 8 and Figure 9The pneumatic control assembly 42 includes a pressure chamber 421 and a connecting rod 422. The pressure chamber 421 is mounted on the mounting base 411, and the end of the pressure chamber 421 away from the mounting base 411 has an opening. The connecting rod 422 is slidably mounted on the mounting base 411 and connected to the locking block 412. The end of the connecting rod 422 away from the locking block 412 has a piston 4221 that fits tightly against the inner wall of the pressure chamber 421. The piston 4221 isolates a negative pressure chamber in the pressure chamber 421, and the negative pressure chamber is connected to the connecting pipe 211 through a pipe.

[0052] This invention utilizes a pressure chamber 421, a connecting rod 422, and a piston 4221 to achieve the function of pushing the locking block 412 by generating air pressure through negative pressure. After the vacuum suction cup 21 adsorbs the sheet material, a negative pressure is formed in the connecting pipe 211 and the vacuum suction cup 21 by the air pump 22. The negative pressure chamber in the pressure chamber 421 is connected to the connecting pipe 211 and is normally in a negative pressure state. The side of the piston 4221 away from the negative pressure chamber is subjected to atmospheric pressure, thereby generating air pressure on the piston 4221. The piston 4221 and the connecting rod 422 transmit the air pressure to the locking block 412, causing the locking block 412 to tend to move away from the mounting base 411. When the locking block 412 is aligned with the locking groove 413, the locking block 412 engages with the locking groove 413 under the action of the air pressure, preventing the connecting pipe 211 from resetting.

[0053] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A multi-threaded stacking device for sheet metal, characterized in that, Includes a frame (1), on which a movable platform (11) that can slide in the horizontal direction is provided, and on which a lifting mounting frame (111) that can be raised and lowered is provided. The mounting frame (111) is provided with at least two sets of vacuum adsorption mechanisms (2). The vacuum adsorption mechanism (2) includes a vacuum suction cup (21) and an air pump (22). The vacuum suction cup (21) is connected to a connecting pipe (211). The connecting pipe (211) is telescopically mounted on the mounting frame (111), and the vacuum suction cup (21) is connected to the air pump (22) through the connecting pipe (211). The mounting bracket (111) is provided with a communication mechanism (3) for controlling the connection of the connecting pipe (211). When the connecting pipe (211) is extended to the limit position, it is in the reset state. At this time, the connecting mechanism (3) blocks the connection between the connecting pipe (211) and the air pump (22). When the connecting pipe (211) is contracted, it is in the contracted state. At this time, the connecting mechanism (3) connects the connecting pipe (211) and the air pump (22). The connecting mechanism (3) includes a buffer chamber (31) and a transmission assembly (32) that are connected to the connecting pipe (211). The buffer chamber (31) is mounted on the mounting frame (111). The top of the buffer chamber (31) is provided with an air pipe (311) for connecting to the air pump (22). The buffer chamber (31) is equipped with a movable valve plate (312) for sealing the air pipe (311) that can be raised and lowered. The movable valve plate (312) is connected to the connecting pipe (211) via the transmission assembly (32); The mounting bracket (111) is provided with a control mechanism (4), which includes a locking component (41) for limiting the reset of the connecting pipe (211) and a pneumatic control component (42) for controlling the opening and closing of the locking component (41). The pneumatic control component (42) is connected to the air pump (22).

2. The multi-threaded stacking device for sheet metal according to claim 1, characterized in that, The portion of the connecting pipe (211) located inside the buffer chamber (31) is provided with a limiting plate (212), and the movable valve plate (312) is provided with a first elastic element (3121) for pushing the limiting plate (212) to reset.

3. The multi-threaded stacking device for sheet metal according to claim 2, characterized in that, A partition (213) is provided at the end of the connecting tube (211) away from the vacuum suction cup (21). The periphery of the partition (213) and the limiting plate (212) are tightly fitted with the inner wall of the buffer chamber (31). A micro hole (2121) for gas to pass through is provided on the limiting plate (212). The partition (213) separates the buffer chamber (31) into a buffer chamber that is connected to the outside gas.

4. The multi-threaded stacking device for sheet metal according to claim 1, characterized in that, The movable valve plate (312) is equipped with a distance sensor for detecting the distance between the movable valve plate (312) and the top inner wall of the buffer chamber (31).

5. The multi-threaded stacking device for sheet metal according to claim 1, characterized in that, The transmission assembly (32) includes an extension rod (321), a connecting plate (322), a rack (323), and a rotating gear (324). The extension rod (321) is connected to the movable valve plate (312); The connecting plate (322) is connected to the connecting pipe (211); Two racks (323) are provided, and the two racks (323) are respectively connected to the extension rod (321) and the connecting plate (322); The rotating gear (324) is rotatably mounted on the buffer chamber (31), and both racks (323) are connected to the rotating gear (324) for transmission.

6. The multi-threaded stacking device for sheet metal according to claim 1, characterized in that, The locking assembly (41) includes a mounting base (411) and a locking block (412); The mounting base (411) is mounted on the mounting bracket (111); The card block (412) is slidably mounted on the mounting base (411), and the card block (412) is connected to the pneumatic control component (42) in a transmission manner. The connecting pipe (211) is provided with a card slot (413) that cooperates with the card block (412). When the card block (412) is inserted into the card slot (413), the limiting connection tube (211) is reset.

7. A multi-threaded sheet metal stacking device according to claim 6, characterized in that, When the card block (412) is reset and separated from the card slot (413), it is in a retracted state. The mounting base (411) is provided with a second elastic element (414) for controlling the reset of the card block (412). The two ends of the second elastic element (414) are connected to the card block (412) and the mounting base (411) respectively.

8. A multi-threaded sheet metal stacking device according to claim 6, characterized in that, The pneumatic control assembly (42) includes a pressure chamber (421) and a linkage (422). The pressure chamber (421) is mounted on the mounting base (411), and the end of the pressure chamber (421) away from the mounting base (411) has an opening; The connecting rod (422) is slidably mounted on the mounting base (411) and connected to the locking block (412). The end of the connecting rod (422) away from the locking block (412) is provided with a piston (4221) that fits tightly with the inner wall of the pressure chamber (421). The piston (4221) isolates a negative pressure chamber in the pressure chamber (421), and the negative pressure chamber is connected to the connecting pipe (211) through a pipeline.

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