Plate multi-thread stacking device

Abstract

The invention relates to the technical field of plate stacking, in particular to a plate multi-thread stacking device which comprises a rack, a movable table capable of sliding in the horizontal direction is arranged on the rack, and a mounting frame capable of ascending and descending is arranged on the movable table; at least two groups of vacuum adsorption mechanisms are arranged on the mounting frame, each vacuum adsorption mechanism comprises a vacuum suction cup and an air pump, the vacuum suction cups are communicated with connecting pipes, the connecting pipes are arranged on the mounting frame in a telescopic manner, and the vacuum suction cups are communicated with the air pumps through the connecting pipes; a communication mechanism for controlling the communication of the connecting pipe is arranged on the mounting frame; when the connecting pipe extends to the limit position and is in a reset state, the communicating mechanism blocks communication between the connecting pipe and the air pump at the moment, and when the connecting pipe is in a contraction state after contraction, the communicating mechanism communicates the connecting pipe and the air pump at the moment. The function of automatically adsorbing the plates according to the number and specification of the plates is achieved, and the problem that the plates deform due to uneven stress in the plate transferring process is solved.

Description

Technical Field

[0001] The invention relates to the technical field of sheet material stacking, and in particular to a sheet material multi-thread stacking device. Background Art

[0002] SPC flooring is a new type of floor decoration material. When processing the sheets, in order to facilitate the transportation and packaging of the sheets, the sheets need to be stacked. However, in the process of transporting the sheets, some large-sized sheets are prone to deformation such as belly dropping or warping once the force is uneven, which affects the quality of the sheets.

[0003] To this end, a Chinese patent with authorization announcement number CN218707231U discloses a metal sheet stacking device, which controls the lower end of the suction cup to fit with the upper surface of the metal plate through a lifting cylinder. The suction cup and the upper surface of the metal plate are sucked together to keep the middle of the metal plate in a lifted and fixed state during the transportation process, avoiding the phenomenon of the metal plate falling in the middle due to the large surface of the metal plate.

[0004] However, when transporting multiple types of plates or multiple plates at a time, the existing transfer device has limited adaptability and is unable to adjust the appropriate adsorption position according to the size and quantity of the plates. As a result, the plates may still be deformed due to uneven force during transportation, or even fall off and cannot be smoothly transported. Summary of the invention

[0005] In view of the above problems, a multi-threaded stacking device for sheets is provided, which solves the deformation problem of sheets due to uneven force during the sheet transfer process through a frame, a vacuum adsorption mechanism and a connecting mechanism.

[0006] In order to solve the problems of the prior art, the present invention provides a multi-thread stacking device for sheets, comprising a frame, a movable platform which can slide in a horizontal direction is provided on the frame, and a mounting frame which can be raised and lowered is provided on the movable platform; at least two groups of vacuum adsorption mechanisms are provided on the mounting frame, and the vacuum adsorption mechanisms include a vacuum suction cup and an air pump, and the vacuum suction cup is connected with a connecting pipe, and the connecting pipe is telescopically arranged on the mounting frame, and the vacuum suction cup is connected with the air pump through the connecting pipe; a connecting mechanism for controlling the connection of the connecting pipe is provided on the mounting frame; when the connecting pipe is extended to the limit position, it is in a reset state, and at this time, the connecting mechanism blocks the connection between the connecting pipe and the air pump, and when the connecting pipe is contracted, it is in a contracted state, and at this time, the connecting mechanism connects the connecting pipe and the air pump.

[0007] Preferably, the connecting mechanism includes a buffer bin and a transmission assembly connected to the connecting pipe; the buffer bin is arranged on a mounting frame, an air pipe for connecting to an air pump is provided at the top of the buffer bin, and a movable valve plate for closing the air pipe can be raised and lowered in the buffer bin; the movable valve plate is connected to the connecting pipe through the transmission assembly.

[0008] Preferably, a control mechanism is provided on the mounting bracket. The control mechanism includes a locking component for restricting the reset of the connecting pipe and a pneumatic control component for controlling the opening and closing of the locking component. The pneumatic control component is communicated with the air pump.

[0009] Preferably, a limiting plate is provided on the part of the connecting pipe located in the buffer bin, and a first elastic member for pushing the limiting plate to reset is provided on the movable valve plate.

[0010] Preferably, a partition plate is provided at one end of the connecting pipe away from the vacuum suction cup. The peripheries of the partition plate and the limiting plate are both closely fitted with the inner wall of the buffer bin. Micro holes for gas to pass through are provided on the limiting plate; the partition plate divides a buffer cavity communicated with the outside gas in the inner cavity of the buffer bin.

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

[0012] Preferably, the transmission component includes an extension rod, a connecting plate, a rack and a rotating gear; the extension rod is connected with the movable valve plate; the connecting plate is connected with the connecting pipe; there are two racks, and the two racks are respectively connected with the extension rod and the connecting plate; the rotating gear is rotatably arranged on the buffer bin, and both racks are in transmission connection with the rotating gear.

[0013] Preferably, the locking component includes a mounting seat and a clamping block; the mounting seat is arranged on the mounting bracket; the clamping block is slidably mounted on the mounting seat, and the clamping block is in transmission connection with the pneumatic control component. A clamping groove matched with the clamping block is provided on the connecting pipe; when the clamping block is inserted and matched with the clamping groove, the reset of the connecting pipe is restricted.

[0014] Preferably, when the clamping block is reset, it is separated from the clamping groove and in a contracted state. A second elastic member for controlling the reset of the clamping block is provided in the mounting seat, and both ends of the second elastic member are respectively connected with the clamping block and the mounting seat.

[0015] Preferably, the pneumatic control component includes a pneumatic chamber and a connecting rod; the pneumatic chamber is arranged on the mounting seat, and an opening is provided at one end of the pneumatic chamber away from the mounting seat; the connecting rod is slidably arranged on the mounting seat and connected with the clamping block, and a piston closely fitted with the inner wall of the pneumatic chamber is provided at one end of the connecting rod away from the clamping block; the piston isolates a negative pressure chamber in the pneumatic chamber, and the negative pressure chamber is communicated with the connecting pipe through a pipeline.

[0016] The beneficial effects of the present invention compared with the prior art are: 1. The present invention realizes the function of automatically adsorbing sheet materials according to the quantity and specifications of sheet materials through a frame, a vacuum adsorption mechanism and a communication mechanism. When performing multi-threaded synchronous transportation, the vacuum suction cup abuts against the surface of the sheet material to compress the connecting pipe, and the communication mechanism connects the vacuum suction cup and the air pump, thereby adsorbing the sheet material. The vacuum suction cups that do not contact the sheet material do not perform the adsorption action, achieving the function of adapting to sheet materials of different specifications and quantities, and being able to perform multi-threaded synchronous transfer of multiple sheet materials. Through the cooperation of multiple groups of vacuum adsorption mechanisms, when transporting large-sized sheet materials or multiple sheet materials synchronously, the situation of unstable adsorption of the sheet material can be avoided, thereby solving the problem of deformation of the sheet material caused by uneven force during the transfer process of the sheet material.

[0017] 2. The present invention realizes the function of controlling the connection between the connecting pipe and the air pump through a buffer bin, an air pipe, a movable valve plate and a transmission assembly. By lifting the movable valve plate, the effect of closing the air pipe is achieved, thereby achieving the purpose of closing and communicating the buffer bin, and further controlling the connection between the vacuum suction cup and the air pump. And the movable valve plate is connected to the connecting pipe through the transmission assembly. When the vacuum suction cup is squeezed and the connecting pipe is contracted, the connecting pipe controls the movable valve plate to move downward through the transmission assembly, thereby connecting the vacuum suction cup and the air pump, and adsorbing the sheet material by providing negative pressure through the air pump.

[0018] 3. The present invention realizes the function of restricting the reset of the connecting pipe during the transfer process of the sheet material through a locking assembly and a pneumatic control assembly. Once the connecting pipe resets due to shaking during the transfer of the sheet material, the movable valve plate will close the air pipe, thereby disconnecting the connection between the vacuum suction cup and the air pump, causing the vacuum suction cup to lose the adsorption force and the sheet material to fall off. Therefore, a locking assembly is provided to restrict the reset of the connecting pipe and maintain the adsorption force of the vacuum suction cup on the sheet material. Brief Description of the Drawings

[0019] Figure 1 is a three-dimensional schematic diagram of a multi-threaded stacking device for sheet materials of the present invention.

[0020] Figure 2 is a three-dimensional schematic diagram of the mounting rack and the vacuum adsorption mechanism in a multi-threaded stacking device for sheet materials of the present invention.

[0021] Figure 3 is a three-dimensional schematic diagram of a single group of vacuum adsorption mechanisms in a multi-threaded stacking device for sheet materials of the present invention.

[0022] Figure 4 is a three-dimensional schematic diagram of the internal structure of the buffer bin, the transmission assembly and the control mechanism in a multi-threaded stacking device for sheet materials of the present invention.

[0023] Figure 5 is of the present invention Figure 4 partial enlarged schematic diagram at position A in

[0024] Figure 6It is a three-dimensional schematic diagram of a vacuum suction cup, a communication mechanism, and a control mechanism in a multi-threaded stacking device for sheet materials of the present invention when the connecting pipe is in a reset state.

[0025] Figure 7 It is a three-dimensional schematic diagram of a vacuum suction cup, a communication mechanism, and a control mechanism in a multi-threaded stacking device for sheet materials of the present invention when the connecting pipe is in a contracted state.

[0026] Figure 8 It is a three-dimensional schematic diagram of a connecting pipe and a control mechanism in a multi-threaded stacking device for sheet materials of the present invention.

[0027] Figure 9 It is a three-dimensional schematic diagram of a control mechanism in a multi-threaded stacking device for sheet materials of the present invention.

[0028] Figure 10 It is a three-dimensional schematic diagram of the internal structure of a buffer bin in a multi-threaded stacking device for sheet materials of the present invention.

[0029] The reference numerals in the figure are: 1, frame; 11, movable table; 111, mounting frame; 12, roller conveyor line; 13, placing table; 2, vacuum adsorption mechanism; 21, vacuum suction cup; 211, connecting pipe; 212, limiting plate; 2121, micro-hole; 213, partition plate; 22, air pump; 3, communication mechanism; 31, buffer bin; 311, air pipe; 312, movable valve plate; 3121, first elastic member; 32, transmission assembly; 321, extension rod; 322, connecting plate; 323, rack; 324, rotating gear; 325, rotating shaft; 326, belt pulley; 327, synchronous belt; 4, control mechanism; 41, locking assembly; 411, mounting seat; 412, clamping block; 413, clamping groove; 414, second elastic member; 42, pneumatic control assembly; 421, air pressure chamber; 422, connecting rod; 4221, piston. Specific embodiments

[0030] To further understand the features, technical means, and specific purposes and functions achieved by the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] Refer to Figures 1-3: A multi-threaded stacking device for sheet materials, comprising a frame 1, on which there is a movable table 11 that can slide horizontally, and on the movable table 11 there is a mounting frame 111 that can be lifted and lowered; on the mounting frame 111 there are at least two groups 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 with a connecting pipe 211, the connecting pipe 211 is telescopically arranged on the mounting frame 111, and the vacuum suction cup 21 is connected with the air pump 22 through the connecting pipe 211; on the mounting frame 111 there is a connecting mechanism 3 for controlling the connection of the connecting pipe 211; when the connecting pipe 211 extends 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 contracts, it is in the contracted state, at this time the connecting mechanism 3 connects the connecting pipe 211 and the air pump 22.

[0032] The present invention realizes the function of automatically adsorbing sheet materials according to the quantity and specifications of sheet materials through the frame 1, the vacuum adsorption mechanism 2 and the connecting mechanism 3. When performing multi-threaded synchronous transportation, the vacuum suction cup 21 abuts against the surface of the sheet material and compresses the connecting pipe 211, and the connecting mechanism 3 connects the vacuum suction cup 21 and the air pump 22, thereby adsorbing the sheet material. And the vacuum suction cup 21 that is not in contact with the sheet material does not perform the adsorption action, achieving the function of adapting to sheet materials of different specifications and quantities, and being able to perform multi-threaded synchronous transportation of multiple sheet materials. Through the cooperation of multiple groups of vacuum adsorption mechanisms 2, when transporting large-sized sheet materials or multiple sheet materials synchronously, the situation of unstable adsorption of the sheet material can be avoided, thereby solving the problem of deformation of the sheet material caused by uneven force during the transportation of the sheet material. Below the frame 1 there is a roller conveyor line 12 for conveying sheet materials, and on one side of the frame 1 there is a placement table 13 for carrying sheet materials. On the movable table 11 there is a linear actuator for controlling the lifting and lowering of the mounting frame 111, and inside the movable table 11 there is a moving component for controlling the horizontal movement of the movable table 11 on the frame 1. The sheet materials on the roller conveyor line 12 are stacked on the placement table 13 through the movable table 11 and the vacuum adsorption mechanism 2.

[0033] In the working state, first, a plurality of sheet materials are conveyed to the material taking position through the idler conveyor line 12, and then the mounting frame 111 is driven to move downward by the linear driver. The vacuum suction cup 21 contacts the sheet material. After the vacuum suction cup 21 abuts against the sheet material, the connecting pipe 211 is compressed under the influence of the reaction force, so that the connecting pipe 211 is transformed from the reset state to the contracted state. The communication mechanism 3 controls the communication between the connecting pipe 211 and the air pump 22, and then the air pump 22 provides negative pressure, so that the vacuum suction cup 21 adsorbs the sheet material. Furthermore, only the vacuum suction cups 21 whose projections in the vertical direction are located at the position of the sheet material are activated, and the sheet material is adsorbed, achieving the effect of adapting to sheet materials of different specifications. When transporting a plurality of sheet materials at one time, the sheet materials can also be stably adsorbed according to the size and position of the sheet materials. After the 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 sheet material through the vacuum suction cup 21, and then the movable table 11 is controlled to move above the storage table 13 by the moving component built in the movable table 11. Then, the mounting frame 111 is controlled to descend, and then the adsorption of the sheet material is cancelled, and the sheet material is stacked on the storage table 13.

[0034] Refer to Figures 2-4 : The communication mechanism 3 includes a buffer chamber 31 communicated with the connecting pipe 211 and a transmission component 32; the buffer chamber 31 is arranged on the mounting frame 111, a trachea 311 for connecting with the air pump 22 is arranged at the top of the buffer chamber 31, and a movable valve plate 312 for closing the trachea 311 is arranged in the buffer chamber 31 in a liftable manner; the movable valve plate 312 is in transmission connection with the connecting pipe 211 through the transmission component 32.

[0035] The present invention realizes the function of controlling the communication between the connecting pipe 211 and the air pump 22 through the buffer chamber 31, the trachea 311, the movable valve plate 312 and the transmission component 32. The effect of closing the trachea 311 is achieved by the lifting of the movable valve plate 312, and further the purpose of closing and communicating the buffer chamber 31 is achieved, and then the communication between the vacuum suction cup 21 and the air pump 22 is controlled. And the movable valve plate 312 is connected with the connecting pipe 211 through the transmission component 32. When the vacuum suction cup 21 is squeezed and the connecting pipe 211 is contracted, the connecting pipe 211 controls the movable valve plate 312 to move downward through the transmission component 32, and then the vacuum suction cup 21 and the air pump 22 are communicated, and 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, the vacuum suction cup 21 is squeezed after abutting against the sheet material, and the connecting pipe 211 is pushed under the squeezing action, so that the connecting pipe 211 is transformed from the reset state to the contracted state. During this process, the connecting pipe 211 moves upward relative to the buffer chamber 31, and drives the movable valve plate 312 to move downward through the transmission component 32, so that the movable valve plate 312 is separated from the trachea 311 and no longer blocks the trachea 311. The vacuum suction cup 21 is communicated with 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.

[0036] Refer to Figure 4 、 Figures 6-8 : A control mechanism 4 is provided on the mounting bracket 111. The control mechanism 4 includes a locking assembly 41 for restricting the reset of the connecting pipe 211 and a pneumatic control assembly 42 for controlling the opening and closing of the locking assembly 41. The pneumatic control assembly 42 is communicated with the air pump 22.

[0037] The present invention realizes the function of restricting the reset of the connecting pipe 211 during the process of transporting the sheet material through the locking assembly 41 and the pneumatic control assembly 42. Once the connecting pipe 211 resets due to shaking during the transportation of the sheet material, the movable valve plate 312 will close the air pipe 311, thereby disconnecting the communication between the vacuum suction cup 21 and the air pump 22, causing the vacuum suction cup 21 to lose its adsorption force and the sheet material to fall off. Therefore, the locking assembly 41 is provided to restrict the reset of the connecting pipe 211 and maintain the adsorption force of the vacuum suction cup 21 on the sheet material. When the connecting pipe 211 is driven by the extrusion force provided by the sheet material and contracts, the connecting pipe 211 controls the movable valve plate 312 to move downward through the transmission assembly 32, and then no longer blocks the air pipe 311. At this time, a negative pressure is provided by the air pump 22, and the pneumatic control assembly 42 is communicated with the air pump 22 and will also be affected by the negative pressure, and then controls the locking assembly 41 to start. At this time, the vacuum suction cup 21 has just adsorbed the sheet material and is still in a contracted state. Then, the mounting bracket 111 is lifted by the linear actuator on the movable table 11 to lift the sheet material. During this process, the gravity of the sheet material acts on the vacuum suction cup 21, and the vacuum suction cup 21 moves downward under this pulling force, thereby causing the connecting pipe 211 to extend. However, the connecting pipe 211 will be affected by the locking assembly 41, so that the connecting pipe 211 is restricted from further extending before approaching the reset state, avoiding the vacuum suction cup 21 from losing its adsorption force.

[0038] Refer to Figure 4 and Figure 10 : A limiting plate 212 is provided on the part of the connecting pipe 211 located in the buffer bin 31, and a first elastic member 3121 for pushing the limiting plate 212 to reset is provided on the movable valve plate 312.

[0039] The present invention realizes the function of automatically resetting the connecting pipe 211 after the transfer is completed through the limiting plate 212 and the first elastic member 3121. The limiting plate 212 provided on the connecting pipe 211 can limit the telescopic range of the connecting pipe 211. When the connecting pipe 211 is in the reset state, the limiting plate 212 abuts against the inner wall of the buffer bin 31 under the elastic force of the first elastic member 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 drops onto the placement table 13 to complete the stacking action. At this time, the control assembly is also no longer affected by the negative pressure when it is started, and thus the reset restriction of the locking assembly 41 on the connecting pipe 211 is cancelled. The limiting plate 212 on the connecting pipe 211 moves under the elastic force of the first elastic member 3121, thereby driving the connecting pipe 211 and the vacuum suction cup 21 to reset, so as to facilitate the transfer action to be carried out again.

[0040] Refer to Figure 4 , Figure 8 and Figure 10 : A partition plate 213 is provided at one end of the connecting pipe 211 away from the vacuum suction cup 21. The circumferences of the partition plate 213 and the limiting plate 212 are both in close fit with the inner wall of the buffer bin 31. A micro hole 2121 for gas passage is provided on the limiting plate 212; the partition plate 213 divides a buffer cavity communicating with the outside gas in the inner cavity of the buffer bin 31.

[0041] The present invention realizes the function of providing damping when the connecting pipe 211 expands and contracts through the partition plate 213 and the micro hole 2121 provided on the limiting plate 212. The buffer cavity separated by the partition plate 213 in the buffer bin 31 can play a certain buffering role when the connecting pipe 211 expands and contracts. When the vacuum suction cup 21 abuts against the sheet material and the air pump 22 generates negative pressure to adsorb the sheet material through the vacuum suction cup 21. On one side of the partition plate 213 close to the buffer cavity, it is in communication with the outside and the air pressure is close to the atmospheric pressure, while on the side of the partition plate 213 away from the buffer cavity, it is negative pressure. Therefore, the partition plate 213 is subjected to the air pressure away from the buffer cavity under the pressure action, and thus the connecting pipe 211 has a tendency to contract. The linear actuator on the movable table 11 drives the mounting frame 111 to move upward, and the sheet material is lifted by the vacuum suction cup 21. Under the action of gravity, the connecting pipe 211 elongates. Through the setting of the locking assembly 41, it is possible to prevent the connecting pipe 211 from reaching the reset state. And the elongation of the connecting pipe 211 can also be restricted through the negative pressure action. When the connecting pipe 211 elongates, in the buffer cavity, the upper and lower spaces located above the limiting plate 212 exchange gas, and the gas exchange speed is restricted through the micro hole 2121, and thus a buffer is formed through the gas to avoid the situation of rapid lifting and lowering of the sheet material. Further improve the stability of the sheet material transportation, avoid the situation of rapid shaking of the sheet material, and thus avoid the deformation of the sheet material under shaking and ensure the quality of the sheet material.

[0042] Refer to Figure 4:A distance sensor for detecting the distance between the movable valve plate 312 and the top inner wall of the buffer bin 31 is provided on the movable valve plate 312.

[0043] The present invention realizes the function of detecting the position of the movable valve plate 312 through the distance sensor. Furthermore, when transporting the material plate, the weight of the material plate is judged according to the position of the movable valve plate 312, so as to adjust the negative pressure provided by the air pump 22 and the adsorption force of the vacuum chuck 21. When the weight of the material plate is large, sufficient adsorption force can be provided to stably transport the material plate. The distance sensor is electrically connected to the controller. After the vacuum chuck 21 adsorbs the material plate, the mounting frame 111 and the vacuum chuck 21 are driven to move upward by the linear driver on the movable table 11. The vacuum chuck 21 and the connecting pipe 211 move downward relative to the mounting frame 111 under the action of the gravity of the material plate, while the partition plate 213 is affected by the air pressure and hinders the downward movement of the partition plate 213. When the connecting pipe 211 moves downward, it will drive the movable valve plate 312 to move upward through the transmission assembly 32, and then judge the movement of the movable valve plate 312 by judging the equal distance between the movable valve plate 312 and the top inner wall of the buffer bin 31 through the distance sensor. Adjust the negative pressure according to the movement situation to stably adsorb the sheet material.

[0044] Refer to 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, and the two racks 323 are respectively connected to the extension rod 321 and the connecting plate 322; the rotating gear 324 is rotatably arranged on the buffer bin 31, and the two racks 323 are both in transmission connection with the rotating gear 324.

[0045] The present invention realizes the function of driving the movable valve plate 312 to move when the connecting pipe 211 moves through the extension rod 321, the connecting plate 322, the rack 323 and the rotating gear 324. There are two rotating gears 324, and two rotating shafts 325 are rotatably arranged on the outer wall of the buffer bin 31, and the two rotating shafts 325 are in transmission connection through a belt 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 meshed with it to rotate. This rotating gear 324 drives another rotating gear 324 to rotate synchronously through the belt pulley 326 and the synchronous belt 327, and then drives the rack 323 connected to the extension rod 321 to move, and drives the extension rod 321 and the movable valve plate 312 to move.

[0046] Refer to Figures 6-9: The locking component 41 includes a mounting base 411 and a clamping block 412; the mounting base 411 is arranged on the mounting frame 111; the clamping block 412 is slidably mounted on the mounting base 411, and the clamping block 412 is in transmission connection with the pneumatic control component 42, and a clamping groove 413 cooperating with the clamping block 412 is formed on the connecting pipe 211; when the clamping block 412 is inserted and cooperated with the clamping groove 413, the reset of the connecting pipe 211 is restricted.

[0047] The present invention realizes the function of restricting the reset of the connecting pipe 211 through the mounting base 411, the clamping block 412 and the clamping groove 413. An arc surface is formed on one side of the clamping block 412 close to the vacuum suction cup 21. During the transfer process, the vacuum suction cup 21 and the connecting pipe 211 elongate under the action of the gravity of the sheet material. During the elongation process, when the clamping block 412 is aligned with the clamping groove 413, the clamping block 412 slides towards the direction close to the clamping groove 413 under the torque provided by the pneumatic control component 42, and then is inserted and cooperated with the clamping groove 413. When the connecting pipe 211 is stressed and contracts, the arc surface of the clamping block 412 is extruded against the inner wall of the clamping groove 413, and then the clamping block 412 is compressed into the mounting base 411, and the clamping block 412 is separated from the clamping groove 413. So that the clamping block 412 only restricts the reset of the connecting pipe 211 without affecting the contraction of the connecting pipe 211. After the clamping block 412 is inserted and cooperated with the clamping groove 413, it can play a role in stabilizing the position of the connecting pipe 211. Only when the connecting pipe 211 is subjected to a large force can the clamping block 412 be pushed to reset to control the contraction of the connecting pipe 211.

[0048] Refer to Figure 8 and Figure 9 : When the clamping block 412 resets and is separated from the clamping groove 413 and is in a contracted state, a second elastic member 414 for controlling the reset of the clamping block 412 is arranged in the mounting base 411, and two ends of the second elastic member 414 are respectively connected with the clamping block 412 and the mounting base 411.

[0049] The present invention realizes the function of automatically resetting the clamping block 412 when the vacuum suction cup 21 is not in a negative pressure state through the second elastic member 414. In order to enable the connecting pipe 211 to reset smoothly. When the vacuum suction cup 21 is not adsorbed to the sheet material, the pneumatic control component 42 will not be pushed by the negative pressure to drive the clamping block 412. At this time, the clamping block 412 is completely contracted into the mounting base 411 under the elastic force of the second elastic member 414, and then the clamping block 412 will not be in contact with the connecting pipe 211. Even if the clamping block 412 is aligned with the clamping groove 413, the clamping block 412 will not be inserted into the clamping groove 413. Furthermore, the connecting pipe 211 and the vacuum suction cup 21 can be smoothly reset under the elastic force of the first elastic member 3121, so as to facilitate the subsequent adsorption and transfer work.

[0050] Refer to Figure 8 and Figure 9:The pneumatic control component 42 includes a pneumatic chamber 421 and a connecting rod 422; the pneumatic chamber 421 is arranged on the mounting seat 411, and an opening is provided at one end of the pneumatic chamber 421 away from the mounting seat 411; the connecting rod 422 is slidably arranged on the mounting seat 411 and connected to the clamping block 412, and a piston 4221 that closely fits with the inner wall of the pneumatic chamber 421 is provided at one end of the connecting rod 422 away from the clamping block 412; the piston 4221 isolates a negative pressure chamber in the pneumatic chamber 421, and the negative pressure chamber is communicated with the connecting pipe 211 through a pipeline.

[0051] The present invention realizes the function of pushing the clamping block 412 through the air pressure generated by negative pressure through the pneumatic chamber 421, the connecting rod 422 and the piston 4221. After the vacuum sucker 21 adsorbs the sheet material, a negative pressure is formed in the connecting pipe 211 and the vacuum sucker 21 by the air pump 22, and the negative pressure chamber in the pneumatic chamber 421 is communicated with the connecting pipe 211, and is usually in a negative pressure state. The side of the piston 4221 away from the negative pressure chamber is affected by the atmospheric pressure, and thus an air pressure is formed on the piston 4221. The piston 4221 and the connecting rod 422 transmit the air pressure to the clamping block 412, so that the clamping block 412 has a tendency to move away from the mounting seat 411. When the clamping block 412 is aligned with the card slot 413, the clamping block 412 is inserted and matched with the card slot 413 under the action of this air pressure, restricting the reset of the connecting pipe 211.

[0052] The above embodiments only represent one or several implementation manners of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A multi-threaded stacking device for sheet materials, characterized in that: The invention comprises a frame (1), wherein a movable platform (11) capable of sliding in a horizontal direction is provided on the frame (1), and a mounting frame (111) capable of lifting and lowering is provided on the movable platform (11); At least two groups of vacuum adsorption mechanisms (2) are provided on the mounting frame (111), the vacuum adsorption mechanism (2) comprising a vacuum suction cup (21) and an air pump (22), the vacuum suction cup (21) being connected to a connecting pipe (211), the connecting pipe (211) being telescopically arranged on the mounting frame (111), and the vacuum suction cup (21) being connected to the air pump (22) via the connecting pipe (211); A connecting mechanism (3) for controlling the connection of the connecting pipe (211) is provided on the mounting frame (111); When the connecting tube (211) is extended to the limit position, it is in a reset state, at which time the connecting mechanism (3) blocks the connection between the connecting tube (211) and the air pump (22); when the connecting tube (211) is contracted, it is in a contracted state, at which time the connecting mechanism (3) connects the connecting tube (211) and the air pump (22).

2. A multi-threaded stacking device for sheet materials according to claim 1, characterized in that: The communication mechanism (3) comprises a buffer bin (31) and a transmission assembly (32) which are communicated with the connection pipe (211); The buffer bin (31) is disposed on the mounting frame (111), an air pipe (311) for connecting to the air pump (22) is provided at the top of the buffer bin (31), and a movable valve plate (312) for closing the air pipe (311) is provided in the buffer bin (31) in a manner that allows it to be lifted and lowered; The movable valve plate (312) is drivingly connected to the connecting pipe (211) via the transmission assembly (32).

3. A multi-threaded sheet stacking device according to claim 1, characterized in that: A control mechanism (4) is provided on the mounting frame (111), the control mechanism (4) comprising a locking assembly (41) for limiting the resetting of the connecting tube (211) and a pneumatic control assembly (42) for controlling the opening and closing of the locking assembly (41), the pneumatic control assembly (42) being in communication with the air pump (22).

4. A multi-threaded sheet stacking device according to claim 2, characterized in that: A portion of the connecting pipe (211) located in the buffer bin (31) is provided with a limit plate (212), and a first elastic member (3121) for pushing the limit plate (212) to return to its original position is provided on the movable valve plate (312).

5. A multi-threaded sheet stacking device according to claim 4, characterized in that: A partition plate (213) is provided at one end of the connecting pipe (211) away from the vacuum suction cup (21), the peripheral sides of the partition plate (213) and the limiting plate (212) are tightly matched with the inner wall of the buffer bin (31), and the limiting plate (212) is provided with micro holes (2121) for gas to pass through; The partition plate (213) separates a buffer chamber in the inner cavity of the buffer bin (31) to communicate with external gas.

6. A multi-threaded sheet stacking device according to claim 2, characterized in that: The movable valve plate (312) is provided with a distance sensor for detecting the distance between the movable valve plate (312) and the top inner wall of the buffer bin (31).

7. The multi-threaded stacking device for sheet materials according to claim 2, characterized in that: The transmission assembly (32) comprises 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 disposed on the buffer bin (31), and the two racks (323) are both in transmission connection with the rotating gear (324).

8. The multi-threaded stacking device for sheet materials according to claim 3, characterized in that: The locking assembly (41) comprises a mounting seat (411) and a clamping block (412); The mounting seat (411) is arranged on the mounting frame (111); The clamping block (412) is slidably mounted on the mounting seat (411), and the clamping block (412) is drivingly connected to the pneumatic control component (42), and a clamping groove (413) matching with the clamping block (412) is provided on the connecting pipe (211); When the clamping block (412) is plugged into and matched with the clamping groove (413), the connection pipe (211) is restricted from resetting.

9. A multi-threaded plate stacking device according to claim 8, characterized in that: When the clamping block (412) is reset and separated from the clamping slot (413), it is in a contracted state. A second elastic member (414) for controlling the reset of the clamping block (412) is provided in the mounting seat (411). Two ends of the second elastic member (414) are respectively connected to the clamping block (412) and the mounting seat (411).

10. The multi-thread stacking device for sheet materials according to claim 8, characterized in that: The pneumatic control assembly (42) includes an air pressure chamber (421) and a connecting rod (422); The air pressure cabin (421) is arranged on the mounting seat (411), and an opening is provided at one end of the air pressure cabin (421) away from the mounting seat (411); The connecting rod (422) is slidably disposed on the mounting seat (411) and connected to the clamping block (412); an end of the connecting rod (422) away from the clamping block (412) is provided with a piston (4221) that is tightly matched with the inner wall of the air pressure chamber (421); The piston (4221) isolates a negative pressure chamber in the air pressure chamber (421), and the negative pressure chamber is connected to the connecting pipe (211) through a pipeline.

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