An automatic LCD strip insertion machine

Abstract

This invention discloses an automatic LCD insert machine, comprising a conveyor belt driven by a transmission roller, two support frames placed on the conveyor belt, and two sets of limiting posts installed on the support frames. Rubber strips are provided at the connection points between the limiting posts and the support frames. The two sets of limiting posts correspond to the two support frames respectively, and the gap between two adjacent limiting posts in each set is used for inserting LCDs. A switching mechanism changes the engagement state of the control posts and the irregular grooves, altering the posture corresponding to the gap between the two limiting posts. This prevents the limiting posts from deforming after prolonged use in a single application mode, thus avoiding uneven cell thickness that may be caused by limiting post deformation. This invention uses airbags between the LCDs, which reduces the precision requirements of the support frames and limiting posts, making it highly applicable and versatile. Support frames and limiting posts of the same specifications can be used for various high-specification LCDs; only the inflation degree of the airbags needs to be controlled.

Description

Technical Field

[0001] This invention belongs to the field of LCD insert technology, and specifically relates to an automatic LCD insert machine. Background Technology

[0002] In the production of LCDs (TN, STN, CSTN), cell adjustment is an essential process. Cell adjustment refers to the process where, after liquid crystal is poured into a liquid crystal cell composed of two glass plates, the opening is sealed with adhesive. The sealing process is as follows: First, pressure is applied to the two glass plates, causing a slight deformation of the liquid crystal cell, resulting in a small amount of liquid crystal flowing out. After cleaning, UV-curable adhesive is applied. Upon release of pressure, the liquid crystal cell returns to its original shape, drawing in the same small amount of adhesive. Then, it is sent to a UV curing machine for curing. Inconsistent cell pressure during this process can lead to uneven color in the LCD product; hence, this production process is called cell adjustment. Currently available cell adjustment equipment is either mechanical or single-pneumatic. Because mechanical presses use two metal plates to squeeze from both ends, while single-airbag presses use an airbag on one end and a metal plate on the other, the pressure is transferred between LCDs during the pressurization process. Since LCDs are hard materials, the pressure distribution is uneven between different LCDs or in different areas of the same LCD after pressurization. This leads to uneven cell thickness, poor product consistency, and low product qualification rate and grade.

[0003] The support frame and limiting post used to insert the LCD are only connected at the bottom, with an opening at the top for inserting the LCD. With long-term use, coupled with the pressure of the airbag on the limiting post, the limiting post is prone to deformation, which will still lead to uneven cell thickness. Summary of the Invention

[0004] In order to solve the above-mentioned problems in the existing technology, the present invention aims to provide an automatic LCD strip insertion machine.

[0005] The technical solution adopted in this invention is as follows:

[0006] An automatic LCD strip insertion machine includes a conveyor belt driven by a drive roller. Two support frames are placed on the conveyor belt, and two sets of limiting posts are installed on each support frame. Rubber strips are provided at the connection points between the limiting posts and the support frames. Each set of limiting posts corresponds to one of the two support frames. The gap between two adjacent limiting posts in each set is used for inserting an LCD. A switching mechanism is provided between the two support frames to control whether the gap between the two sets of limiting posts can move relative to each other. The switching mechanism includes a fixed rod, with limiting blocks fixed at both ends of the fixed rod. The two limiting blocks abut against the two support frames to prevent them from moving further together. A middle section of the fixed rod is fixed with... The control frame has a sliding rod slidably mounted in the middle, with the sliding direction of the sliding rod perpendicular to the length direction of the fixed rod. Sliding strips are slidably mounted at both ends of the control frame, with the sliding direction of the sliding strips consistent with the length direction of the fixed rod. The sliding rod controls the sliding of the sliding strips via a connecting rod. A control post is fixedly mounted at the far ends of the two sliding strips, passing through and slidably connected to the limiting block. A shaped groove is fixedly mounted on the near sides of the two support frames, and the two control posts cooperate with the two shaped grooves. The cooperation between the control posts and the shaped grooves has two states: a slidable state and a locked state.

[0007] As a preferred embodiment of the present invention, there are two conveyor belts arranged in parallel, driven by the same set of drive rollers, with a gap between the two conveyor belts, and the switching mechanism is located within the gap between the two conveyor belts.

[0008] As a preferred embodiment of the present invention, a drive cylinder is provided in the gap between the two conveyor belts, the cylinder barrel of the drive cylinder is fixedly mounted on the lifting device, a connecting frame is fixedly mounted on the piston rod of the drive cylinder, and a push block is fixedly mounted at each end of the connecting frame, the two push blocks are distributed along the conveying direction of the conveyor belts; there are two switching mechanisms, and the two push blocks cooperate with the two switching mechanisms respectively.

[0009] As a preferred embodiment of the present invention, it further includes multiple airbags, which are alternately inserted into the gaps formed by the limiting posts. Each airbag has a storage box at both ends. One of the storage boxes has an inflation port fixedly attached to it, which communicates with the airbag. The other storage box has a placement space, and a winding shaft is rotatably mounted on one inner wall of the placement space. The two ends of the winding shaft are connected to the inner wall of the placement space via torsion springs. A receiving groove is provided on the side wall of the placement space near the airbag, and the receiving groove penetrates the side wall of the placement space. The airbag passes through the receiving groove, and one end of the airbag located in the placement space is fixedly mounted on the side of the winding shaft. The airbag can be wound around the winding shaft and stored in the placement space when it is not inflated. Each storage box has a connecting buckle fixedly attached to the side away from the airbag.

[0010] As a preferred embodiment of the present invention, a top block is fixedly provided at one end of the sliding rod, and the top block cooperates with the push block; a control piece is slidably provided at the end of the sliding rod away from the top block, and a stop block is fixedly provided at both ends of the control piece, and a slider is provided on one side of each stop block; a slide rail is fixedly provided at both ends of the control frame, and two sliders are slidably provided on the two slide rails respectively, and both ends of each connecting rod are rotatably connected to one slider and one sliding bar respectively.

[0011] As a preferred embodiment of the present invention, a limiting groove is provided at the end of the sliding rod away from the top block, the control plate is slidably connected to the limiting groove, the sliding direction of the control plate is perpendicular to the length direction of the sliding rod, a cavity is provided inside the end of the sliding rod away from the top block, the cavity is located inside the limiting groove, a rotating shaft is rotatably provided on one inner wall of the cavity, a sector gear is fixedly provided on the rotating shaft, the control plate has a hollow structure, two control racks are fixedly provided on the inner side of the control plate, the two control racks can respectively mesh with the teeth on the sector gear, and at any given time only one of the control racks meshes with the teeth on the sector gear.

[0012] As a preferred embodiment of the present invention, one end of the rotating shaft passes through the cavity, and a drive gear is provided at the end of the rotating shaft passing through the cavity. The drive gear is connected to the rotating shaft through a one-way bearing. A drive rack is provided on one side of the drive gear, and the drive rack is fixedly disposed on one side of the control frame. The drive rack meshes with the drive gear.

[0013] As a preferred embodiment of the present invention, the distance between the two sliders is less than the distance between the two stops, and the distance between the two sliders is greater than the length of the control piece.

[0014] In a preferred embodiment of the present invention, the limiting block is provided with a mounting hole and a limiting hole, the inner diameter of the mounting hole is larger than the inner diameter of the limiting hole, the inner diameter of the limiting hole is equal to the diameter of the control post, and a step is formed at the connection between the mounting hole and the limiting hole; the control post passes through both the mounting hole and the limiting hole, a return spring is provided on the periphery of the control post, a guide pin is fixedly provided at the end of the control post away from the control frame, the diameter of the guide pin is larger than the diameter of the control post, one end of the return spring is fixedly connected to the guide pin, and the end of the return spring away from the guide pin abuts against the step at the connection between the mounting hole and the limiting hole.

[0015] As a preferred embodiment of the present invention, the irregular groove includes a rectangular groove and a cylindrical groove. The length of the rectangular groove is greater than the inner diameter of the cylindrical groove. The cylindrical groove is located in the middle of the rectangular groove. The depth of the cylindrical groove is greater than that of the rectangular groove. A fastening groove is provided at the connection between the cylindrical groove and the rectangular groove. The height of the fastening groove is greater than the height of the rectangular groove. The limiting block and the control post are slidably connected to the cylindrical groove, and the relative sliding direction is the circumferential direction of the control post. The control post is slidably connected to the rectangular groove, and the relative sliding direction is the length direction of the rectangular groove.

[0016] The beneficial effects of this invention are as follows: As an automatic LCD inserting machine, this invention changes the cooperation state of the control column and the irregular groove through a switching mechanism, and changes the posture corresponding to the gap between the two limiting columns. This avoids the deformation of the limiting columns due to prolonged use in a single usage mode, thereby avoiding the problem of uneven cell thickness that may be caused by the deformation of the limiting columns. Furthermore, the airbags of this invention are flat and retractable when not inflated, while inflated airbags provide support, protection, and cushioning for the LCD. During the conveying and processing of LCDs, the requirements for the conveying equipment are reduced, allowing the conveying equipment to shake or vibrate within a certain range. At the same time, the conveying speed can be appropriately increased, thereby improving the LCD processing efficiency. This invention uses airbags between LCDs, which reduces the precision requirements of the carrier frame and limiting columns, making it highly applicable and versatile. The same specification of carrier frame and limiting columns can be used for various high-specification LCDs, requiring only control of the airbag inflation level. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is the present invention. Figure 1 A top-view structural diagram;

[0020] Figure 3 This is the present invention. Figure 1A schematic diagram of the airbag structure after it is concealed;

[0021] Figure 4 This is the present invention. Figure 3 A schematic diagram of the structure after the support frame and switching mechanism are concealed;

[0022] Figure 5 This is the present invention. Figure 1 A schematic diagram of the switching mechanism;

[0023] Figure 6 This is the present invention. Figure 5 A schematic diagram of the structure after the sliding rod and limiting block are hidden;

[0024] Figure 7 This is the present invention. Figure 5 A schematic diagram of the limiting block and fixing rod structure;

[0025] Figure 8 This is the present invention. Figure 7 A top-view structural diagram;

[0026] Figure 9 This is the present invention. Figure 8 A schematic diagram of the AA-direction structure;

[0027] Figure 10 This is the present invention. Figure 5 A schematic diagram of the sliding rod structure;

[0028] Figure 11 This is the present invention. Figure 10 A top-view structural diagram;

[0029] Figure 12 This is the present invention. Figure 11 A schematic diagram of the BB direction structure;

[0030] Figure 13 This is the present invention. Figure 1 A schematic diagram of the inverted airbag structure;

[0031] Figure 14 This is the present invention. Figure 13 A cross-sectional view of a storage box with storage space;

[0032] Figure 15 This is the present invention. Figure 1 A schematic diagram of the support frame and limiting column structure;

[0033] Figure 16 This is the present invention. Figure 15 A front view structural diagram;

[0034] Figure 17 This is the present invention. Figure 16 A schematic diagram of the CC-direction structure. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0037] The following is combined Figure 1-17This invention describes an automatic LCD insert machine, comprising a conveyor belt 12 driven by a drive roller 11. Two support frames 18 are placed on the conveyor belt 12, and two sets of limiting posts 19 are installed on each support frame 18. Rubber strips 48 are provided at the connection points between the limiting posts 19 and the support frames 18. The two sets of limiting posts 19 correspond to the two support frames 18 respectively, and the gap between two adjacent limiting posts 19 in each set is used for inserting an LCD. A switching mechanism 17 is provided between the two support frames 18. The switching mechanism 17 controls whether the gap between the two sets of limiting posts 19 can move relative to each other. The switching mechanism 17 includes a fixing rod 37, and limiting blocks 23 are fixed at both ends of the fixing rod 37. The two limiting blocks 23 are used to abut against the two support frames 18, preventing them from moving further together. A control frame 31 is fixedly mounted in the middle of the fixed rod 37. A sliding rod 29 is slidably mounted in the middle of the control frame 31. The sliding direction of the sliding rod 29 is perpendicular to the length direction of the fixed rod 37. A sliding strip 32 is slidably mounted at each end of the control frame 31. The sliding direction of the sliding strip 32 is consistent with the length direction of the fixed rod 37. The sliding rod 29 controls the sliding of the sliding strip 32 through a connecting rod 24. A control post 35 is fixedly mounted at the ends of the two sliding strips 32 that are far apart from each other. The control post 35 passes through the limiting block 23 and is slidably connected to the limiting block 23. A shaped groove is fixedly mounted on the side of the two support frames 18 that are close to each other. The two control posts 35 cooperate with the two shaped grooves respectively. The cooperation between the control posts 35 and the shaped grooves has two states: a slidable state and a locked state. The cooperation state between the control posts 35 and the shaped grooves is changed by the switching mechanism 17, which changes the posture corresponding to the gap between the two limiting posts 19, and prevents the limiting posts 19 from deforming after prolonged use in a single mode.

[0038] Advantageously, there are two conveyor belts 12, which are arranged in parallel and driven by the same set of drive rollers 11. There is a gap between the two conveyor belts 12, and the switching mechanism 17 is located within the gap between the two conveyor belts 12. The hollow structure of the conveyor belts 12 ensures that the switching mechanism 17 can be installed between the conveyor belts 12, as well as the space for the switching mechanism 17 to operate normally.

[0039] Advantageously, a drive cylinder 16 is provided in the gap between the two conveyor belts 12. The cylinder barrel of the drive cylinder 16 is fixedly mounted on the lifting device. A connecting frame 20 is fixedly mounted on the piston rod of the drive cylinder 16. A push block 15 is fixedly mounted at each end of the connecting frame 20. The two push blocks 15 are distributed along the conveying direction of the conveyor belts 12. There are two switching mechanisms 17, and the two push blocks 15 cooperate with the two switching mechanisms 17 respectively. The push block 15 only drives the switching mechanism 17 after it rises. After the push block 15 falls, the switching mechanism 17 maintains its continuous operation.

[0040] Advantageously, it also includes multiple airbags 13, which are alternately inserted into the gaps formed by the limiting posts 19. Each airbag 13 has a storage box 14 at both ends. One of the storage boxes 14 is fixedly provided with an inflation port 43, which communicates with the airbag 13. The other storage box 14 is provided with a placement space 46, and a winding shaft 47 is rotatably provided on one inner wall of the placement space 46. The two ends of the winding shaft 47 are connected to the inner wall of the placement space 46 by torsion springs. The placement space 46 has a receiving groove 45 on one side wall near the airbag 13, which penetrates the side wall of the placement space 46. The airbag 13 passes through the receiving groove 45, and one end of the airbag 13 located within the placement space 46 is fixedly mounted on the side of the winding shaft 47. In its non-inflated state, the airbag 13 can be wound onto the winding shaft 47 and stored within the placement space 46. Each storage box 14 has a connecting buckle 44 fixedly mounted on the side away from the airbag 13. The airbag 13 is flat and retractable in its non-inflated state. In its inflated state, the airbag 13 provides support, protection, and cushioning for the LCD. During the transport and processing of the LCD, this reduces the requirements on the transport equipment, allowing the equipment to sway or vibrate within a certain range, while also appropriately increasing the transport speed and improving LCD processing efficiency.

[0041] Advantageously, a top block 30 is fixedly provided at one end of the sliding rod 29, and the top block 30 cooperates with the push block 15; a control piece 27 is slidably provided at the end of the sliding rod 29 away from the top block 30, and a stop block 34 is fixedly provided at both ends of the control piece 27, with a slider 25 provided on one side of each stop block 34; a slide rail 28 is fixedly provided at both ends of the control frame 31, and two sliders 25 are slidably provided on the two slide rails 28 respectively; each end of the connecting rod 24 is rotatably connected to one slider 25 and one sliding bar 32 respectively. The top block 30 is not only for buffering, but also for limiting the maximum distance that the sliding rod 29 can slide relative to the control frame 31. During the reset process of the switching mechanism 17, the end of the sliding rod 19 away from the top block 30 can also cooperate with the push block 15. The end of the sliding rod 19 away from the top block 30 does not have a buffer structure because the specifications of the connecting rod 24 directly limit the maximum distance that the sliding rod 29 can slide in the opposite direction.

[0042] Advantageously, the sliding rod 29 has a limiting groove 40 at the end away from the top block 30, and the control piece 27 is slidably connected to the limiting groove 40. The sliding direction of the control piece 27 is perpendicular to the length direction of the sliding rod 29. The sliding rod 29 has a cavity inside the end away from the top block 30, and the cavity is located inside the limiting groove 40. A rotating shaft 42 is rotatably mounted on one inner wall of the cavity, and a sector gear 36 is fixedly mounted on the rotating shaft 42. The control piece 27 has a hollow structure, and two control racks 33 are fixedly mounted on the inner side of the control piece 27. The two control racks 33 can respectively mesh with the teeth on the sector gear 36, and at any given time only one of the control racks 33 meshes with the teeth on the sector gear 36. The toothed portion of the sector gear 36 occupies half of the entire gear circumference, i.e., 180°. When it disengages from one of the control racks 33, it immediately engages with the other control rack 33. The two control racks 33 are located on the two sides of the sector gear 36, thereby enabling the control plate to change its direction of motion instantaneously.

[0043] Advantageously, one end of the rotating shaft 42 extends through the cavity, and a drive gear 41 is provided at the end of the rotating shaft 42 extending through the cavity. The drive gear 41 is connected to the rotating shaft 42 via a one-way bearing. A drive rack 26 is provided on one side of the drive gear 41, and the drive rack 26 is fixedly mounted on one side of the control frame 31. The drive rack 26 meshes with the drive gear 41. The one-way bearing is an overrunning clutch, meaning that the shaft and gear only transmit power in one direction, and do not transmit power in the other direction. When there is no transmission, the gear idles without driving the shaft to rotate.

[0044] Advantageously, the distance between the two sliders 25 is less than the distance between the two stops 34, and the distance between the two sliders 25 is greater than the length of the control piece 27. The distance between the two sliders 25 is slightly greater than the length of the control piece 27 plus the length of one of the stops 34, with a very small error. That is, when the control piece 27 moves to its limit position and moves in the opposite direction, the stop 34 on the other side will not immediately touch the corresponding slider 25. At this time, the movement of the sliding rod 29 will still drive the previously moved slider 25 to move slightly. However, this movement of the slider 25 will not cause the control post 35 to move significantly by driving the connecting rod 24, and will not cause the control post 35 and the guide pin 22 to completely disengage from the cylindrical groove 49. That is, the slight movement of the slider 25 will not release the limiting effect of the control post 35 and the cylindrical groove 49. When the control piece 27 moves a certain distance in the opposite direction, after the slider 25 and the stop 34 corresponding to the last attitude adjustment separate, the slight movement of the slider 25 will be directly reset under the action of the return spring 21, and the control post 35 and the guide pin 22 will be inserted into the deepest part of the 49 again.

[0045] Advantageously, the limiting block 23 is provided with a mounting hole 38 and a limiting hole 39. The inner diameter of the mounting hole 38 is larger than the inner diameter of the limiting hole 39, and the inner diameter of the limiting hole 39 is equal to the diameter of the control post 35. A step is formed at the connection between the mounting hole 38 and the limiting hole 39. The control post 35 passes through both the mounting hole 38 and the limiting hole 39. A return spring 21 is provided on the periphery of the control post 35. A guide pin 22 is fixedly provided at the end of the control post 35 away from the control frame 31. The diameter of the guide pin 22 is larger than the diameter of the control post 35. One end of the return spring 21 is fixedly connected to the guide pin 22, and the end of the return spring 21 away from the guide pin 22 abuts against the step at the connection between the mounting hole 38 and the limiting hole 39. The return spring 21 is already in a compressed state when the switching mechanism 17 is not working. When the switching mechanism 17 is working, the return spring 21 is further compressed, thereby enabling the control post 35 to quickly rebound when permissible.

[0046] Advantageously, the irregular groove includes a rectangular groove 50 and a cylindrical groove 49. The length of the rectangular groove 50 is greater than the inner diameter of the cylindrical groove 49. The cylindrical groove 49 is located in the middle of the rectangular groove 50. The depth of the cylindrical groove 49 is greater than that of the rectangular groove 50. A fastening groove 51 is provided at the connection between the cylindrical groove 49 and the rectangular groove 50. The height of the fastening groove 51 is greater than the height of the rectangular groove 50. The limiting block 23 and the control post 35 are slidably connected to the cylindrical groove 49, with the relative sliding direction being the circumferential direction of the control post 35. The control post 35 is slidably connected to the rectangular groove 50, with the relative sliding direction being the length direction of the rectangular groove 50. The middle part of the rectangular groove 50 includes a cylindrical groove 49. When the control post 35 and the guide pin 22 are pulled out halfway from the cylindrical groove 49, the control post 35 can slide in the rectangular groove 50, while the guide pin 22 can slide in the locking groove 51. The locking groove 51 prevents the guide pin 22 from being pulled out further, while not affecting the sliding of the control post 35 in the rectangular groove 50.

[0047] Working principle of this invention:

[0048] The drive roller 11 is connected to the motor, which is mounted on the frame. The motor controls the start, stop, forward and reverse rotation of the conveyor belt 12, as well as its rotation speed. Pneumatic grippers are installed on both sides of the frame and connected to the air pump. The grippers can grab the storage boxes 14 on both sides through the connecting buckle 44 and control the horizontal or vertical movement of the storage boxes 14. The lifting device that controls the lifting of the drive cylinder 16 and the push block 15 is a common hydraulic cylinder and is connected to the frame. The air pump is also connected to the inflation port 43 and controls the inflation and de-inflation states of the airbag 13.

[0049] In the initial state, as shown in the appendix Figure 1 In the state shown, the drive cylinder 16 controlled by the lifting device is in the lifting state, the push block 15 is higher than the upper surface of the conveyor belt 12, the airbag 13 is in the inflated state, the storage boxes 14 at both ends of the airbag 13 are locked with the limiting post 19, the torsion spring on the winding shaft 47 is under force and tends to cause the airbag 13 to retract; the ends of the two support frames 18 are aligned; the guide pin 22 and the control post 35 are located in the cylindrical groove 49.

[0050] The lifting device controls the push block 15 and drive cylinder 16 to descend. At this time, the conveyor belt 12 starts and can normally drive the support frame 18 to move together. The air pump and the pipe connected to the airbag 13 draw in air, controlling the airbag 13 to become de-inflated. Then, the suction cup grabs the LCD and inserts it into the gap between the two adjacent limit posts 19 of the two adjacent airbags 13. After a set of airbags 13 is completely filled, the air pump controls the airbag 13 to inflate and clamp the LCD. At this time, the conveyor belt 12 starts to transport the whole set of LCDs to the next station. During this period, the LCD is stable and firmly inserted. After being transported to the designated position, the conveyor belt 12 stops, the air pump controls the airbag 13 to become de-inflated, and the suction cup grabs the LCDs one by one from the side. After all the LCDs are removed, the conveyor belt 12 restarts and controls the support frame 18 to return to the designated position for re-inserting the LCDs.

[0051] In the above process, the insertion and removal of the LCD constitutes one cycle. After several cycles, the carrier 18 returns and is no longer used directly. Instead, the switching mechanism 17 adjusts the posture of the carrier 18 so that the ends of the two carriers 18 are no longer aligned.

[0052] Specifically, the pneumatic grippers on both sides of the frame are used to lift all the storage boxes 14 and airbags 13, turning them into attachments. Figure 3 The state shown; then the lifting mechanism controls the push block 15 and the drive cylinder 16 to rise, the drive cylinder 16 starts, the drive cylinder 16 drives the air piston rod to extend, the piston rod of the drive cylinder 16 drives the connecting frame 20 and the push block 15 to move, the two push blocks 15 respectively contact the top blocks 30 of the two switching mechanisms 17, because the contact surface between the support frame 18 and the conveyor belt 12 is relatively rough, the friction is large, and the torsion spring has a tendency to bring the two storage boxes 14 closer together, causing the two support frames 18 to move closer to each other, the two support frames 18 clamp the two limit blocks 23 and the fixing rod 37, so that the fixing rod 37 will not move, and the control frame 31 connected to the fixing rod 37 will not move either. The control column 35 is inserted into the cylindrical groove 49, so that the two support frames 18 cannot move relative to each other, so pushing the top block 30 will only drive the sliding rod 29 to move relative to the control frame 31;

[0053] The movement of the sliding rod 29 causes the control piece 27 to move along the length of the sliding rod 29. At this time, the drive gear 41 moves along with the sliding rod 29. The drive gear 41 meshes with the drive rack 26. The rotation of the drive gear 41 in this direction drives the rotating shaft 42 to rotate via a one-way bearing. The rotating shaft 42 drives the sector gear 36 to rotate. The rotation of the sector gear 36 causes the control piece 27 to move along its own length. The control piece 27 slides within the limiting groove 40. The cooperation of the two control racks 33 and the sector gear 36 makes the movement of the control piece 27 reciprocate. A single push of the top block 30 and the sliding rod 29 will cause the control piece 27 to move in one direction. During the reset process of the sliding rod 29 and the top block 30, the drive gear 41 only rotates itself. The moving gear 41 does not drive the rotating shaft 42 to rotate via the one-way bearing. Therefore, during the reset process of the sliding rod 29 and the top block 30, the control plate 27 maintains its state relative to the limiting groove 40. When the sliding rod 29 and the top block 30 are pushed again, the control plate 27 will move in the other direction with the cooperation of the two control racks 33 and the sector gear 36. It can be seen that when the sliding rod 29 is pushed, the control plate 27 moves and deviates to one side of the sliding rod 29. When the top block 30 is reset, the control plate 27 maintains its state of being deviated from one side of the sliding rod 29. When the sliding rod 29 is pushed again, the control plate 27 moves, but the control plate 27 deviates to the other side of the sliding rod 29. When the top block 30 is reset, the control plate 27 also maintains its state of being deviated from the sliding rod 29.

[0054] According to the above process, after pushing the top block 30, the control piece 27 deviates to one side of the sliding rod 29, thereby touching the slider 25 on this side, causing the slider 25 to slide along the slide rail 28, while the other slider 25 remains stationary. The sliding slider 25 drives the sliding bar 32 to slide relative to the control frame 31 through the connecting rod 24. The sliding bar 32 retracts into the control frame 31, and the control post 35 and guide pin 22 move together with the sliding bar 32. Since the fixed rod 37 is not retractable, the positions of the two limit blocks 23 cannot be changed, which will cause the return spring 21 to be limited by the step at the connection between the limit hole 39 and the placement hole 38. The return spring 21 is compressed, and the guide pin 22 and control post 35 extend a certain length from the cylindrical groove 49. When the top block 30 is pushed to contact the control frame 31, the guide pin 22 just extends into the locking groove 51. At this time, the guide pin 22 on the corresponding side of the moving slider 25 can slide with the locking groove 51, and the control post 35 can slide with the rectangular groove 50.

[0055] At this time, the conveyor belt 12 is started, so that the conveying direction of the conveyor belt 12 is from the piston rod side of the drive cylinder 16 to the cylinder barrel side of the drive cylinder 16. At this time, the support frame 18 on the stationary side of the slider 25 cannot move under the abutment of the push block 15 and the top block 30. That is, the push block 15 abuts against the top block 30, the top block 30 abuts against the control frame 31, the control frame 31, the sliding bar 32 and the control post 35 cannot move, and the control post 35 is inserted into the cylindrical groove 49, so the support frame 18 on this side cannot move either; while on the other side, the support frame 18 corresponding to the moving slider 25 loses the constraint of the control post 35 on the cylindrical groove 49, so the support frame 18 can slide. At this time, the ends of the support frames 18 on both sides are no longer aligned. The sliding support frame 18 relative to the stationary support frame 18 slides a distance equal to the gap between the adjacent limit posts 19.

[0056] During the above process, the contact surfaces of the limiting block 23 and the support frame 18 are smooth. Although there is a squeezing force between them, it does not affect the sliding of the two. After the position of the support frame 18 is adjusted, the lifting device controls the push block 15 and the drive cylinder 16 to descend.

[0057] At this time, the storage box 14 and airbag 13 are controlled to descend by the pneumatic grippers on both sides of the frame. The airbag 13 is inserted between the limiting posts 19 again. Compared with the previous insertion state, the ends of the two support frames 18 are not aligned. The support frame 18 on one side moves, and the pressure direction of the airbag 13 on the limiting post 19 changes. The previous lateral expansion of the airbag 13 on the limiting post 19 becomes compression. The deformation of the limiting post 19 caused by long-term use is neutralized. After inserting the LCD for several cycles in this state, the posture of the two support frames 18 is reset and adjusted to return to the initial state.

[0058] The specific reset process is as follows: the conveyor belt 12 controls the support frame 18 to move to a designated position and then stops. The push block 15 and the drive cylinder 16 rise. By controlling the change in the position of the support frame 18 on the conveyor belt 12, the push block 15 is no longer located at the end of the sliding rod 29 with the top block 30, but at the end of the sliding rod 29 away from the top block 30. The conveyor belt 12 is restarted, so that the conveying direction of the conveyor belt 12 is from one side of the cylinder barrel of the drive cylinder 16 to the side of the piston rod of the drive cylinder 16. At this time, the sliding rod 29 is away from the top block 30. One end of the 0 is limited by the push block 15. The support frame 18 on the side where the slider 25 has not moved is still immovable. However, the support frame 18 corresponding to the movement of the slider 25 on the other side will move until the guide pin 22 and the control post 35 are aligned with the cylindrical groove 49. Under the action of the compressed return spring 21, the guide pin 22 and the control post 35 rebound and re-insert into the cylindrical groove 49. The support frame 18 can no longer move. The reset is completed, and the two support frames 18 return to the end alignment state.

[0059] During this process, the return spring 21 drives the guide pin 22 and control column 35 to reset, causing the sliding bar 32 to move. The movement of the sliding bar 32 drives the slider 25 to move via the connecting rod 24. The slider 25 drives the stop block 34 it abuts against to move. The control plate 27 moves along with the stop block 34. The control plate 27 drives the sliding rod 29 and the top block 30 to move. During this period, the two support frames 18 will experience some jerking because of the reset of the sliding rod 29. The end of the sliding rod 29 away from the top block 30 always remains in contact with the push block 15, that is, the sliding rod 29 and the push block 15 do not move relative to each other. However, the sliding rod 29 and the control frame 31 move relative to each other. The fixed rod 37 and the control frame 31 always move together. The limit blocks 23 on both sides of the fixed rod 37 move. Although the support frame 18 can slide with the limit blocks 23, the limit blocks 27... The control post 35 is inserted into the cylindrical groove 49. When the control post 35 is inserted into the cylindrical groove 49, the support frame 18 and the limiting block 23 cannot slide relative to each other. When the control post 35 is pulled out halfway from the cylindrical groove 49, the support frame 18 and the limiting block 23 can slide relative to each other. The sliding range is limited to the length of the rectangular groove 50. Therefore, in the above process, the sliding rod 29 and the push block 15 remain stationary, but the control frame 31 and the support frames 18 on both sides will move. The movement of the support frame 18 corresponding to the originally stationary slider 25 is with the control frame 31 and the movement is small. However, the support frame 18 corresponding to the slider 25 that moved during the previous attitude adjustment process moves a larger distance relative to the control frame 31, in addition to the distance it moves with the control frame 31.

[0060] Then, the lifting device drives the push block 15 and the drive cylinder 16 to reset. At this time, the reset is completed, which is equivalent to half of the working process. That is, one of the support frames 18 adjusts its posture relative to the other support frame 18 and resets. After that, it can continue to be used for several cycles. Then, when adjusting the posture next time, referring to the above principle, the other support frame 18 will be automatically controlled to adjust its posture and then reset, completing the entire working process.

[0061] It should be noted that the frame of the LCD automatic insert machine is spliced ​​from conventional aluminum profiles, and the hydraulic cylinders of the lifting mechanism, the pneumatic grippers on both sides of the frame, and the drive of the conveyor belt 12 are all common mechanical parts.

[0062] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0063] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. An automatic LCD strip insertion machine, characterized in that: The system includes a conveyor belt driven by a drive roller. Two support frames are placed on the conveyor belt, and two sets of limiting posts are installed on each support frame. Rubber strips are provided at the connection points between the limiting posts and the support frames. Each set of limiting posts corresponds to one of the two support frames. The gap between two adjacent limiting posts in each set is used to insert an LCD. A switching mechanism is provided between the two support frames to control the relative movement of the two sets of limiting posts. The switching mechanism includes a fixed rod with limiting blocks fixed at both ends. The two limiting blocks prevent the two support frames from moving further together. A control frame is fixed in the middle of the fixed rod. A sliding rod is slidably provided in the middle of the control frame, and the sliding direction of the sliding rod is perpendicular to the length direction of the fixed rod. A sliding strip is slidably provided at each end of the control frame, and the sliding direction of the sliding strip is consistent with the length direction of the fixed rod. The sliding rod controls the sliding of the sliding strip through a connecting rod. A control post is fixed at the far end of each of the two sliding strips, and the control post passes through the limiting block and is slidably connected to the limiting block. A shaped groove is fixed at the close side of each of the two support frames, and the two control posts cooperate with the two shaped grooves respectively. The cooperation between the control posts and the shaped grooves has two states: a slidable state and a locked state. The conveyor belt has two parallel sections, driven by the same set of drive rollers, with a gap between them. The switching mechanism is located within the gap between the two conveyor belts. One end of the sliding rod is fixedly provided with a top block, which cooperates with the push block; the end of the sliding rod away from the top block is slidably provided with a control piece, and both ends of the control piece are respectively fixedly provided with a stop block, and each stop block has a slider on one side; both ends of the control frame are respectively fixedly provided with a slide rail, and the two sliders are respectively slidably provided on the two slide rails; both ends of each connecting rod are respectively rotatably connected to a slider and a sliding bar. The sliding rod has a limiting groove at one end away from the top block. The control plate is slidably connected to the limiting groove. The sliding direction of the control plate is perpendicular to the length direction of the sliding rod. The sliding rod has a cavity inside the end away from the top block. The cavity is located inside the limiting groove. A rotating shaft is rotatably mounted on one inner wall of the cavity. A sector gear is fixed on the rotating shaft. The control plate has a hollow structure. Two control racks are fixed on the inner side of the control plate. The two control racks can mesh with the teeth on the sector gear respectively, and at any given time only one of the control racks meshes with the teeth on the sector gear. One end of the rotating shaft passes through the cavity, and a drive gear is provided at the end of the rotating shaft that passes through the cavity. The drive gear is connected to the rotating shaft through a one-way bearing. A drive rack is provided on one side of the drive gear. The drive rack is fixedly installed on one side of the control frame and meshes with the drive gear. The distance between the two sliders is less than the distance between the two stops, and the distance between the two sliders is greater than the length of the control piece; The limiting block has a placement hole and a limiting hole. The inner diameter of the placement hole is larger than the inner diameter of the limiting hole, and the inner diameter of the limiting hole is equal to the diameter of the control post. A step is formed at the connection between the placement hole and the limiting hole. The control post passes through both the placement hole and the limiting hole. A return spring is provided on the periphery of the control post. A guide pin is fixedly provided at the end of the control post away from the control frame. The diameter of the guide pin is larger than the diameter of the control post. One end of the return spring is fixedly connected to the guide pin, and the end of the return spring away from the guide pin abuts against the step at the connection between the placement hole and the limiting hole. The irregular groove includes a rectangular groove and a cylindrical groove. The length of the rectangular groove is greater than the inner diameter of the cylindrical groove. The cylindrical groove is located in the middle of the rectangular groove and has a greater depth than the rectangular groove. A fastening groove is provided at the connection between the cylindrical groove and the rectangular groove, and the height of the fastening groove is greater than the height of the rectangular groove. The control post is slidably connected to the cylindrical groove in the axial direction of the control post. The control post is also slidably connected to the rectangular groove in the length direction of the rectangular groove.

2. The LCD automatic insert machine according to claim 1, characterized in that: A drive cylinder is provided in the gap between the two conveyor belts. The cylinder barrel of the drive cylinder is fixedly mounted on the lifting device. A connecting frame is fixedly mounted on the piston rod of the drive cylinder. A push block is fixedly mounted at each end of the connecting frame. The two push blocks are distributed along the conveying direction of the conveyor belts. There are two switching mechanisms. The two push blocks cooperate with the two switching mechanisms respectively.

3. The LCD automatic strip insertion machine according to claim 2, characterized in that: It also includes multiple airbags, which are interleaved with the LCD screen in the gaps formed by the limiting posts. Each airbag has a storage box at both ends. One of the storage boxes has an inflation port that communicates with the airbag. The other storage box has a placement space with a winding shaft rotatably mounted on one inner wall of the placement space. The two ends of the winding shaft are connected to the inner wall of the placement space via torsion springs. The side wall of the placement space near the airbag has a take-up and release groove that penetrates the side wall of the placement space. The airbag passes through the take-up and release groove, and one end of the airbag located in the placement space is fixedly mounted on the side of the winding shaft. When the airbag is not inflated, it can be wound around the winding shaft and stored in the placement space. Each storage box has a connecting buckle fixedly mounted on the side away from the airbag.

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