Single board dryer board feeding and distributing device

Abstract

This application provides a veneer drying machine feeding and distributing device, belonging to the technical field of veneer processing equipment. It includes a frame and a control device. The frame is sequentially arranged with a negative pressure conveying device, a first alignment mechanism, a tilting table distributing mechanism, and a layered conveying device along the horizontal conveying direction of the veneers. The first alignment mechanism includes a drive motor, a lower support roller, a swing drive device, a swing frame, and swing rollers. The swing frame is oscillatingly mounted on the frame via the swing drive device. The swing rollers are mounted on the swing frame and are arranged parallel to each other on top of the lower support roller. The side of the swing frame facing the layered conveying device has a baffle wall. By rotating along the frame, the swing frame can block the passageway on the side away from the negative pressure conveying device, aligning the skewed edges of the veneers. Subsequently, the swing drive device drives the swing frame to rotate in the opposite direction, allowing the veneers to continue being transported towards the tilting table distributing mechanism and the layered conveying device, preventing the veneers from warping and getting stuck due to uneven force caused by skewed veneers.

Description

Technical Field

[0001] This application belongs to the technical field of veneer processing equipment, and more specifically, relates to a veneer dryer feeding and distributing device. Background Technology

[0002] A veneer drying and conveying system is a type of equipment used in the wood processing industry. Since the veneer dryer is typically a multi-layered structure, the veneers need to be transported to the dryer in layers by a feeding and separating device before entering the dryer.

[0003] For example, in the prior art, Chinese utility model patent with publication number CN216790666U discloses a control system and drying method for a veneer drying conveyor belt. It includes a feeding device, a rotary distributing mechanism, and a feeding conveyor roller line. The rotary distributing mechanism can swing up and down to align with different layers of the feeding conveyor roller line. The feeding device uses negative pressure to lift the veneers from the veneer stack and convey them to the rotary distributing mechanism, then to the different layers of the feeding conveyor roller line, and finally into the dryer.

[0004] However, in actual use, there may be veneers on the veneer stack that are not properly aligned. These skewed veneers remain skewed as they pass through the feeding device, rotary distributing mechanism, and feeding conveyor rollers, and finally enter the dryer. During the conveying process, the conveying force on the skewed veneers is also skewed relative to the edge of the veneer, which may cause the veneers to tilt and get stuck during conveying. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this application provides a veneer dryer feeding and distributing device. By setting a first alignment mechanism, the edges of the veneers transported by the negative pressure feeding device can be aligned before being conveyed in layers to the layering conveying device, and then conveyed into the dryer, thus avoiding the situation where the veneers tilt and get stuck due to uneven force caused by veneer tilting.

[0006] To achieve the above objectives, the technical solution of this application provides a veneer dryer feeding and distributing device, including a frame and a control device. A negative pressure conveying device, a tilting table distributing mechanism, and a layered conveying device are sequentially arranged on the frame along the horizontal conveying direction of the veneer. All three devices are controlled by the control device. A first alignment mechanism is provided between the negative pressure conveying device and the tilting table distributing mechanism. The first alignment mechanism includes a drive motor, a lower support roller, a swing drive device, a swing frame, and a swing roller. The lower support roller is mounted on the frame, and the drive motor and... The lower support roller is connected by a drive mechanism. The swing frame 1 is oscillatingly mounted on the frame via a swing drive device. The swing roller is mounted on the swing frame 1 and is arranged in parallel on top of the lower support roller. A passage for single boards to pass through is formed between the swing roller and the lower support roller. The two sides of the passage are aligned with the discharge end of the negative pressure conveying device and the inlet end of the layered conveying device, respectively. The drive motor 1 and the swing drive device are both controlled by a control device. The side of the swing frame 1 facing the layered conveying device has a shielding wall. By rotating along the frame, the swing frame 1 can make the shielding wall block the passage on the side away from the negative pressure conveying device.

[0007] When the swing drive device rotates the swing frame until the barrier wall is positioned on the side of the passage away from the negative pressure conveying device, the veneer conveyed from the negative pressure conveying device will abut against the barrier wall, aligning the skewed edges. The swing roller moves away from the lower support roller, opening the passage so that the height of the passage is much greater than the thickness of the veneer, preventing the veneer from being unable to enter the passage due to surface warping. Subsequently, the swing drive device drives the swing frame to rotate in the opposite direction, causing the barrier wall to detach from the passage. At the same time, the swing roller rotates downward to directly above the lower support roller, pressing the veneer and flattening it, reducing the degree of warping. Then, the swing drive device drives the swing frame to rotate in the opposite direction, causing the barrier wall to detach from the passage. The aligned veneer can then continue to be transported towards the slab distribution mechanism and the layered conveying device. By setting up a first alignment mechanism, the edges of the veneers transported by the negative pressure feeding device can be aligned before being layered and conveyed to the layered conveying device, and then to the dryer, avoiding the situation where the warped veneer gets stuck due to uneven force caused by skewed veneers.

[0008] Optionally, the swing drive device is a swing cylinder. The swing frame has an extension on the side facing away from the shielding wall. The base of the swing cylinder is hinged to the frame, and the output end of the swing cylinder is hinged to the extension. The rotation of the swing frame is achieved by the extension and retraction of the swing cylinder.

[0009] Optionally, the swing frame includes a main frame, a pressure roller beam, a threaded inner rod, an external threaded rod, a limiting nut, a locking nut, and a spring. The main frame is hinged to the machine frame, and the extension and the shielding wall are fixedly installed on both sides of the main frame. One side of the main frame has an extension end facing the bottom, and the other side of the main frame has a vertically opened threaded through hole. The external threaded rod is threaded through the threaded through hole, and a through hole is opened inside the external threaded rod along its axial direction. The threaded inner rod slides through the through hole and is clearance-fitted with the through hole. The limiting nut... A screw-on inner thread rod extends through a through hole and abuts against the top edge of an outer thread rod. A locking nut is screwed onto the outer side of the outer thread rod and abuts against the top or bottom edge of the threaded through hole. A step is provided on the outer side wall of the bottom end of the inner thread rod. A spring is provided on the outer side of the inner thread rod and is clamped between the step and the bottom end of the outer thread rod. A pressure roller beam is spaced apart at the bottom of the main frame. A swing roller is installed at the bottom of the pressure roller beam. One end of the pressure roller beam is hinged to the extension end, and the other end is hinged to the bottom end of the inner thread rod.

[0010] With the above setup, under the support of spring one, the threaded inner rod one drives the pressure roller beam one to have a certain space for vertical movement, so that the swing roller has a certain space for vertical elastic movement relative to the main frame one. While ensuring a certain clamping force on the veneer, it can also ensure that veneers of different thicknesses can pass through the passage between the swing roller and the lower support roller.

[0011] Optionally, the swaying platform material distribution mechanism includes a second swaying frame, a lower conveyor roller, an upper pressure roller, and a hydraulic cylinder; the end of the second swaying frame facing the first alignment mechanism is hinged to the frame, the upper pressure roller and the lower conveyor roller are mounted in parallel on the end of the second swaying frame facing the layered conveying device, a drive motor is connected to the lower conveyor roller, the base of the hydraulic cylinder is hinged to the frame, the output end of the hydraulic cylinder is hinged to the second swaying frame, the top of the second swaying frame has a support surface, one end of the support surface is aligned to the passage, and the other end of the support surface is aligned to the top edge of the lower conveyor roller, and the hydraulic cylinder is controlled by a control device.

[0012] The extension and retraction of the hydraulic cylinder can drive the swing frame 2 to swing up and down, so that the single board output path between the lower conveyor roller and the upper pressure roller is aligned with the different layers of the layered conveying device, thereby realizing the layered conveying of single boards.

[0013] Optionally, it also includes chain one, chain two, and a tension sprocket rotatably mounted on the frame. The output end of drive motor one is provided with sprocket one, the end of the lower support roller is provided with sprocket two, the end of the lower conveying roller is provided with sprocket three, and the swing frame two is rotatably mounted with sprocket four and sprocket five toward the side of the first alignment mechanism. Sprocket four and sprocket five are coaxially arranged and fixedly connected to each other. Chain one is closedly wrapped around sprocket one, sprocket two, sprocket four, and tension sprocket, and chain two is closedly wrapped around sprocket five and sprocket three.

[0014] In this way, the lower support roller and the lower conveyor roller can be driven synchronously by sharing a single drive motor, eliminating the need for separate drive motors and reducing the number of drive motors required.

[0015] Optionally, the tilting platform material distribution mechanism also includes a counterweight cylinder, a top sprocket, a counterweight chain, and a guide plate. The top sprocket is mounted on the frame and located at the top of the second tilting frame. The base of the counterweight cylinder is hinged to the frame. One end of the counterweight chain is connected to the output end of the counterweight cylinder, and the other end of the counterweight chain passes around the top sprocket and connects to the end of the second tilting frame away from the first alignment mechanism. The counterweight cylinder assists the second tilting frame in swinging by pulling the counterweight chain wound around the top sprocket. Furthermore, the counterweight cylinder and the hydraulic cylinder act as a double safety measure, ensuring the stability of the second tilting frame and preventing it from suddenly falling and causing danger if one of them fails due to pressure loss.

[0016] The guide plate is fixedly mounted on the second swing frame and located at the top of the support surface. The distance between the guide plate and the support surface gradually decreases from the direction away from the first alignment mechanism, and the edge of the guide plate away from the first alignment mechanism is positioned towards the bottom edge of the upper pressure roller. Because the second swing frame itself needs to swing, the tilt angle of its support surface is not horizontally aligned with the passageway. Especially when the second swing frame tilts downwards, the transported veneer may become suspended and unable to align with the transport path between the upper pressure roller and the lower conveyor roller. The guide plate can guide the tilted veneer onto the transport path between the upper pressure roller and the lower conveyor roller.

[0017] Optionally, the swing frame two also includes a pressure roller beam two, a threaded inner rod two, an external threaded rod two, a limiting nut two, a locking nut two, and a spring two. The swing frame two is fixedly mounted with a main frame two located directly above the lower conveyor roller. One side of the main frame two has an extension end two facing the bottom, and the other side of the main frame two has a threaded through hole two vertically. The external threaded rod two is threaded through the threaded through hole two. A through hole two is opened inside the external threaded rod two along the axial direction. The threaded inner rod two slides through the through hole two and is clearance-fitted with the through hole two. The limiting nut two is screwed into the threaded... The inner rod 2 extends out of the top of the through hole 2 and abuts against the top edge of the outer thread rod 2. The locking nut 2 is screwed onto the outside of the outer thread rod 2 and abuts against the top or bottom edge of the threaded through hole 2. The bottom outer wall of the inner thread rod 2 is provided with a step 2. The spring 2 is sleeved on the outside of the inner thread rod 2 and is clamped between the step 2 and the bottom end of the outer thread rod 2. The pressure roller beam 2 is spaced apart at the bottom of the main frame 2. The upper pressure roller is installed at the bottom of the pressure roller beam 2. One end of the pressure roller beam 2 is hinged to the extension end 2, and the other end of the pressure roller beam 2 is hinged to the bottom end of the inner thread rod 2.

[0018] With the above setup, under the support of spring two, the threaded inner rod two drives the pressure roller beam two to have a certain space for vertical movement, so that the upper pressure roller has a certain space for vertical elastic movement relative to the main frame two. While ensuring a certain clamping force on the veneer, it can also ensure that veneers of different thicknesses can pass through the veneer conveying path between the upper pressure roller and the lower conveyor roller.

[0019] Optionally, the layered conveying device includes several layers of roller conveyors arranged vertically and horizontally on a frame. The feed end of each layer of roller conveyors is opposite to the discharge end of the swaying table material distribution mechanism. Each layer of roller conveyors is equipped with a second alignment mechanism. Each layer of roller conveyors has a mounting frame as a supporting body. Each set of second alignment mechanisms includes a blocking cylinder and a swing frame three. The middle part of the swing frame three is hinged to the mounting frame. The blocking cylinder is located at the bottom of the corresponding mounting frame. The base of the blocking cylinder is hinged to the mounting frame. The output end of the blocking cylinder is hinged to the bottom end of the swing frame three. The top of the swing frame three has a blocking part. Each layer of roller conveyors includes a drive motor two controlled by a control device. The blocking cylinder is controlled by the control device. The blocking cylinder can drive the swing frame three to rotate and cause the blocking part to extend out of the top between two adjacent rollers of the roller conveyor and block the material conveying path.

[0020] After the veneer moves from the slab distribution mechanism to the roller conveyor in the layered conveying device, the veneer may become skewed again due to the up-and-down swing of the slab distribution mechanism. With the above-mentioned design, when the veneer is transported to one of the roller conveyors, the blocking cylinder drives the blocking part to extend beyond the top between two adjacent rollers of the roller conveyor and block the material conveying path, thus blocking and straightening the veneer.

[0021] Optionally, the negative pressure conveying device includes a lifting adsorption device and a conveying adsorption device; the lifting adsorption device is located between the conveying adsorption device and the first alignment mechanism; the lifting adsorption device includes a fan, an adsorption tube, a deformation compensation tube, and a lifting cylinder; the frame is equipped with a vertical slide rail; the fan is fixedly installed on the frame; the adsorption tube is slidably arranged on the vertical slide rail; one end of the lifting cylinder is fixedly connected to the frame; the other end of the lifting cylinder is hinged to the outer wall of the adsorption tube; the top end of the adsorption tube is connected to the air inlet of the fan through the deformation compensation tube; the bottom end of the adsorption tube serves as adsorption port one for adsorbing single boards; both the fan and the lifting cylinder are controlled by a control device; the conveying adsorption device includes a support frame, a second fan, a third drive motor, and several transverse conveying rollers; the support frame and... The frame is fixedly connected, and the support frame has several mounting cavities. The transverse conveying rollers are mounted in the mounting cavities. The axis of each transverse conveying roller extends horizontally along the direction perpendicular to the arrangement of the lifting adsorption device and the conveying adsorption device. The transverse conveying rollers are arranged horizontally along the arrangement direction of the lifting adsorption device and the conveying adsorption device. The bottom side of the transverse conveying rollers extends out of the bottom of the support frame. The drive motor three is fixedly mounted on the frame and is connected to the transmission of the transverse conveying rollers. The air inlet end of the fan two is located at the top of the support frame. There is a ventilation gap between the transverse conveying rollers and the inner wall of the mounting cavity. The bottom end of the ventilation gap serves as the adsorption port two, which extends to the bottom of the support frame. The top end of the ventilation gap is connected to the air inlet end of the fan two. The fan two and the drive motor three are controlled by a control device.

[0022] In operation, adsorption port one is located at the top edge of the single board. The adsorption tube descends to adsorb and lift the edge of the single board, causing it to be lifted at an angle only from one side of the edge. When the top of the single board near the edge approaches adsorption port two, adsorption port two lifts the entire single board, achieving overall adsorption. After being adsorbed, the single board can be conveyed to the next station via a transverse conveyor mechanism. Because the single board is adsorbed and lifted by the negative pressure conveyor device using an angled adsorption method, compared to directly adsorbing the middle of the single board, the instantaneous separation resistance between two adjacent single boards that needs to be overcome is reduced, and the adsorption force required to lift the single board is reduced. The reduction in adsorption force also reduces the resistance that the transverse conveyor mechanism needs to overcome when transversely conveying the single board, thus reducing the power consumption of the entire device. The negative pressure generated by fan two acts directly on adsorption port two through the ventilation gap. After the single board is adsorbed by adsorption port two, it directly contacts the bottom side of the transverse conveyor roller. The transverse conveyor roller rotates under the drive of drive motor three, realizing the transverse transport of the single board. Since the lateral conveying mechanism can transport the single board laterally without following the lateral movement of the single board, the energy consumption of the entire device is reduced.

[0023] Optionally, it also includes a lifting platform, a first chain conveyor, and two sets of second chain conveyors. The lifting platform is located at the bottom of the negative pressure conveying device, and the two sets of second chain conveyors are located on both sides of the lifting platform. The discharge end of the first chain conveyor is opposite to the inlet end of the two sets of second chain conveyors. The lifting platform, the first chain conveyor, and the two sets of second chain conveyors are all controlled by a control device.

[0024] The lifting platform is lowered below the second chain conveyor. After the veneer stack is transported from the first chain conveyor to the second chain conveyor, the lifting platform rises again to lift the veneer stack close to the negative pressure conveying device. The negative pressure conveying device can then pick up and transport the veneers one by one from the lifting platform.

[0025] The advantages of the technical solution in this application compared to the prior art are as follows:

[0026] A first alignment mechanism is installed between the negative pressure conveying device and the swaying table material distribution mechanism. In this mechanism, the swing drive device rotates the swing frame until the barrier wall is positioned on the side of the passage away from the negative pressure conveying device. At this point, the veneer conveyed from the negative pressure conveying device comes into contact with the barrier wall, aligning the misaligned edges. The swing roller moves away from the lower support roller, opening the passage so that its height is significantly greater than the veneer's thickness, preventing veneers from being unable to enter the passage due to surface warping. Subsequently, the swing drive device rotates the swing frame in the opposite direction, disengaging the barrier wall from the passage. Simultaneously, the swing roller rotates downwards to directly above the lower support roller, pressing and flattening the veneer to reduce warping. The aligned and flattened veneer can then continue to be transported towards the swaying table material distribution mechanism and the layered conveying device. By setting up a first alignment mechanism, the edges of the veneers transported by the negative pressure feeding device can be aligned before being transported in layers to the layering conveying device, and then to the dryer. This avoids the situation where the veneers are stuck due to uneven force caused by skewed veneers, and can also reduce the degree of warping of the veneers by flattening them. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a front view of the overall structure of the veneer feeding and distributing device for a veneer dryer.

[0029] Figure 2 The image shows the right view of the overall structure of the feeding and distributing device for a veneer dryer.

[0030] Figure 3This is a front view of the first alignment mechanism and the tray distribution mechanism in their first state.

[0031] Figure 4 for Figure 3 Enlarged view of a portion of point A in the middle;

[0032] Figure 5 This is a front view of the second state structure of the first alignment mechanism and the tilting table material distribution mechanism;

[0033] Figure 6 This is a front view of the swing frame structure;

[0034] Figure 7 This is an exploded view of the swing frame structure.

[0035] Figure 8 This is a front view of the second structure of the swing frame;

[0036] Figure 9 Exploded view of the second structure of the swing frame;

[0037] Figure 10 This is a front view of the layered conveying device structure;

[0038] Figure 11 for Figure 10 A magnified view of the second alignment mechanism at point B when it is obstructed in the single-board conveyor path;

[0039] Figure 12 for Figure 10 A magnified view of the second alignment mechanism at point B in the middle, when it avoids the single-board conveyor path;

[0040] Figure 13 Front view of the negative pressure conveying device;

[0041] Figure 14 Top view of the adsorption tube and vertical slide rail structure;

[0042] Figure 15 This is a side view of the lifting adsorption device structure;

[0043] Figure 16 for Figure 15 Enlarged view of a section at point C;

[0044] Figure 17 This is a front view of the conveying and adsorption device structure;

[0045] Figure 18 This is a schematic diagram of the ventilation structure of the conveying and adsorption device;

[0046] Figure 19 for Figure 18 Enlarged view of a section at point D;

[0047] Figure 20 for Figure 17The diagram shows a top view of the conveying and adsorption device.

[0048] Icons: 100. Single board; 1. Frame; 2. Negative pressure conveying device; 201. Lifting and adsorption device; 202. Conveying and adsorption device; 203. Fan 1; 204. Adsorption pipe; 205. Deformation compensation pipe; 206. Lifting cylinder; 207. Vertical slide rail; 208. Adsorption port 1; 209. Support frame; 210. Fan 2; 211. Drive motor 3; 212. Horizontal conveying roller; 213. Mounting cavity; 214. Ventilation gap; 215. Adsorption port 2; 216. Sliding frame; 217. Ventilation pipe; 3. Table distribution mechanism; 301 302. Swing frame two; 303. Lower conveyor roller; 304. Upper pressure roller; 305. Hydraulic cylinder; 306. Support surface; 307. Chain one; 308. Chain two; 309. Tensioning sprocket; 310. Sprocket one; 311. Sprocket two; 312. Sprocket three; 313. Sprocket four; 314. Sprocket five; 315. Counterweight cylinder; 316. Top sprocket; 317. Counterweight chain; 318. Guide plate; 319. Main frame two; 320. Pressure roller beam two; 321. Threaded inner rod two; 322. Threaded outer rod two; 323. Limiting nut two; 324. 324. Locking nut 2; 325. Spring 2; 326. Extension end 2; 327. Threaded through hole 2; 328. Through hole 2; 329. Step 2; 330. Photoelectric sensor 1; 330. Photoelectric sensor 3; 4. Layered conveying device; 401. Roller conveyor; 402. Second alignment mechanism; 403. Mounting bracket; 404. Blocking cylinder; 405. Swing frame 3; 406. Blocking part; 407. Drive motor 2; 408. Photoelectric sensor 2; 5. First alignment mechanism; 501. Drive motor 1; 502. Lower support roller; 503. Swing 504. Cylinder; 505. Swing frame 1; 506. Swing roller; 507. Passageway; 508. Baffle wall; 509. Extension section; 510. Main frame 1; 511. Pressure roller beam 1; 512. Threaded inner rod 1; 513. External threaded rod 1; 514. Limit nut 1; 515. Locking nut 1; 516. Spring 1; 517. Extension end 1; 518. Threaded through hole 1; 519. Through hole 1; 6. Lifting platform; 601. Photoelectric sensor 4; 7. Chain conveyor 1; 8. Chain conveyor 2; 801. Photoelectric sensor 5. Detailed Implementation

[0049] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0050] Example 1:

[0051] This embodiment provides a single-board negative pressure feeding device, based on Figure 1 As shown, the system includes a frame 1 and a control device. A negative pressure conveying device 2, a stacking and distributing mechanism 3, and a layered conveying device 4 are sequentially arranged on the frame 1 along the horizontal conveying direction of the single-board 100. In this embodiment, the horizontal arrangement of the negative pressure conveying device 2, the stacking and distributing mechanism 3, and the layered conveying device 4 is taken as the Y-axis direction, and the horizontal direction perpendicular to the Y-axis is taken as the X-axis direction. The control device uses a PLC controller, and the negative pressure conveying device 2, the stacking and distributing mechanism 3, and the layered conveying device 4 are all controlled by the control device. In use, the negative pressure conveying device 2 is located at the top of the single-board stack. After lifting the single-board 100, the negative pressure conveying device 2 horizontally conveys the single-board 100 to the stacking and distributing mechanism 3. The stacking and distributing mechanism 3 distributes the single-board 100 to different layers of the layered conveying device 4 through its own oscillation.

[0052] Based on the above structure, Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, a first alignment mechanism 5 is provided between the negative pressure conveying device 2 and the swaying table material distribution mechanism 3. The first alignment mechanism 5 includes a drive motor 501, a lower support roller 502, a swing drive device, a swing frame 504, and a swing roller 505. The lower support roller 502 is mounted on the frame 1, and the drive motor 501 is connected to the lower support roller 502. The swing frame 504 is swayed and mounted on the frame 1 via the swing drive device. The swing roller 505 is mounted on the swing frame 504 and is arranged in parallel on top of the lower support roller 502. The rotation axes of the lower support roller 502, the swing roller 505, and the swing frame 504 all extend horizontally along the X-axis. A passage 506 is formed between the swing roller 505 and the lower support roller 502 for the single board 100 to pass through. The two sides of the passage 506 are aligned with the discharge end of the negative pressure conveying device 2 and the feed end of the layered conveying device 4, respectively. The veneer 100 transported from the negative pressure conveying device 2 is transferred to the layered conveying device 4 through the passage 506. The veneer 100 is driven by the lower support roller 502 driven by the drive motor 501. Both the drive motor 501 and the swing drive device are controlled by the control device. The swing frame 504 has a shielding wall 507 on the side facing the layered conveying device 4. By rotating along the frame 1, the swing frame 504 can make the shielding wall 507 block the passage 506 on the side away from the negative pressure conveying device 2.

[0053] In practical use, based on Figure 3 and Figure 5As shown, the swing drive device rotates the swing frame 504 so that the baffle wall 507 blocks the passage 506 on the side away from the negative pressure conveying device 2. The swing roller 505 moves away from the lower support roller 502, opening the passage 506 so that the height of the passage 506 is much greater than the thickness of the veneer 100, preventing the veneer 100 from being unable to enter the passage 506 due to surface warping. After the veneer 100 transported from the negative pressure conveying device 2 enters the passage 506, its edge abuts against the baffle wall 507, aligning and straightening the tilted veneer 100. Subsequently, based on Figure 4 As shown, the swing drive device drives the swing frame 504 to rotate in the opposite direction, the shielding wall 507 rotates upward to disengage from the passage 506, and the swing roller 505 rotates downward to directly above the lower support roller 502 and squeezes the single board 100, flattening the warped single board 100. Under the driving action of the lower support roller 502, the single board 100 continues to be transported to the layered conveying device 4. By setting the first alignment mechanism 5, the edges of the single board 100 transported by the negative pressure conveying device 2 can be aligned before being layered and transported to the layered conveying device 4, and then transported into the dryer. This avoids the situation where the warped single board 100 gets stuck due to uneven force caused by the tilt of the single board 100, and can also perform a certain degree of flattening operation on the warped single board 100, reducing the degree of warping of the single board 100.

[0054] The swing drive device is a swing cylinder 503. The swing frame 504 has an extension 508 on the side opposite to the shielding wall 507. The base of the swing cylinder 503 is hinged to the frame 1, and the output end of the swing cylinder 503 is hinged to the extension 508. Specifically, in this embodiment, based on Figure 3 and Figure 5 As shown, the swing cylinder 503 is inverted and positioned directly above the swing frame 504. The top base of the swing cylinder 503 is hinged to the frame 1, and the bottom output end of the swing cylinder 503 is hinged to the extension 508. When the swing cylinder 503 retracts, the swing frame 504 rotates counterclockwise, causing the blocking wall 507 to block the passage 506 and opening the passage 506. When the swing cylinder 503 extends, the swing frame 504 rotates clockwise, the blocking wall 507 disengages from the passage 506, and the swing roller 505 rotates to directly above the lower support roller 502 to press the single plate 100.

[0055] Furthermore, based on Figure 6 and Figure 7As shown, the swing frame 504 includes a main frame 509, a pressure roller beam 510, a threaded inner rod 511, an external threaded rod 512, a limiting nut 513, a locking nut 514, and a spring 515. The main frame 509 is hinged to the machine frame 1, and the extension 508 and the shielding wall 507 are respectively fixedly installed on both sides of the main frame 509. One side of the main frame 509, facing the bottom, has an extension end 516. The other side of the main frame 509 has a vertically formed threaded through hole 517. An externally threaded rod 512 is screwed through the threaded through hole 517. A through hole 518 is formed axially inside the externally threaded rod 512. An internally threaded rod 511 slides through the through hole 518 and is clearance-fitted with it. A limiting nut 513 is screwed onto the top of the internally threaded rod 511 extending out of the through hole 518 and abuts against the top edge of the externally threaded rod 512. A locking nut 514 is screwed onto... The outer side of the external threaded rod 512 abuts against the bottom edge of the threaded through hole 517. The outer side wall of the bottom end of the threaded inner rod 511 is provided with a step 519. The spring 515 is sleeved on the outer side of the threaded inner rod 511 and is clamped between the step 519 and the bottom end of the external threaded rod 512. The pressure roller beam 510 is spaced at the bottom of the main frame 509. The swing roller 505 is installed at the bottom of the pressure roller beam 510. One end of the pressure roller beam 510 is hinged to the extension end 516, and the other end of the pressure roller beam 510 is hinged to the bottom end of the threaded inner rod 511.

[0056] The threaded inner rod 511 is a threaded rod with external threads. Because it passes through the through hole 518 inside the external threaded rod 512, it is called the threaded inner rod 511. The threaded inner rod 511 can slide up and down along the external threaded rod 512. When the swing roller 505 rotates to directly above the lower support roller 502 and abuts against the single plate 100, the swing roller 505 is subjected to an upward force, causing the pressure roller beam 510 to rotate upward along the extension end 516, and the threaded inner rod 511 to slide upward along the through hole 518, compressing the spring 515. The compressed spring 515 exerts a downward reaction force on the pressure roller beam 510, causing the swing roller 505 to press the single plate 100 tightly. Through the above arrangement, the swing roller 505 has a certain vertical movement margin relative to the main frame 509, adapting to single plates 100 of different thicknesses, and ensuring the tightness of the single plate 100. By tightening the external threaded rod 512, the initial internal force of the spring 515 can be adjusted to regulate the clamping force on the single plate 100 according to its thickness. The locking nut 514 secures the external threaded rod 512, preventing it from loosening during operation. The locking nut 514 can abut against either the bottom edge or the top edge of the threaded through hole 517, achieving the same effect. The internal threaded rod 511 has a clearance fit with the through hole 518, allowing it a certain amount of horizontal movement to accommodate the lateral displacement at the end of the pressure roller beam 510 during rotation, preventing jamming.

[0057] Furthermore, based on Figure 3 and Figure 5 As shown, the swaying platform material distribution mechanism 3 includes a second swaying frame 301, a lower conveying roller 302, an upper pressure roller 303, and a hydraulic cylinder 304. The end of the second swaying frame 301 facing the first alignment mechanism 5 is hinged to the frame 1. The upper pressure roller 303 and the lower conveying roller 302 are mounted parallel to each other on the end of the second swaying frame 301 facing the layered conveying device 4. The drive motor 501 is connected to the lower conveying roller 302. The base of the hydraulic cylinder 304 is hinged to the frame 1, and the output end of the hydraulic cylinder 304 is hinged to the second swaying frame 301. The top of the second swaying frame 301 has a support surface 305. One end of the support surface 305 is aligned with the passage 506, and the other end of the support surface 305 is aligned with the top edge of the lower conveying roller 302. The hydraulic cylinder 304 is controlled by a control device.

[0058] In this embodiment, the hydraulic cylinder 304 is located at the bottom of the swing frame 301. The hydraulic cylinder 304, through extension and retraction, causes the end of the swing frame 301 away from the first alignment mechanism 5 to swing up and down, aligning the output path of the single board 100 between the lower conveying roller 302 and the upper pressure roller 303 to different layers of the layered conveying device 4, thus achieving layered conveying of the single board 100. The support surface 305 is used to support the single board 100. Based on... Figure 3As shown, when the swing frame 2 301 swings to the upward tilt, the single board 100 is output from the lower support roller 502 and contacts the support surface 305. Under the guidance of the support surface 305, it tilts upward and moves into the conveying path between the lower conveying roller 302 and the upper pressure roller 303.

[0059] Furthermore, based on Figures 3 to 5 As shown, the system also includes chain 306, chain 307, and a tension sprocket 308 rotatably mounted on the frame 1. A sprocket 309 is located at the output end of the drive motor 501. A sprocket 310 is located at the end of the lower support roller 502, and a sprocket 311 is located at the end of the lower conveyor roller 302. A sprocket 312 and a sprocket 313 are rotatably mounted on the swing frame 301 facing the first alignment mechanism 5. Sprockets 312 and 313 are coaxially arranged and fixedly connected to each other. Chain 306 is wrapped around sprockets 309, 310, 312, and 308, while chain 307 is wrapped around sprockets 313 and 311. Thus, a single drive motor 501 can be used to synchronously drive the lower support roller 502 and the lower conveyor roller 302, eliminating the need for separate drive motors and reducing the number of drive motors required.

[0060] Furthermore, based on Figure 5 As shown, the tilting platform material distribution mechanism 3 also includes a counterweight cylinder 314, a top sprocket 315, a counterweight chain 316, and a guide plate 317. The top sprocket 315 is mounted on the frame 1 and located on top of the second swing frame 301. The base of the counterweight cylinder 314 is hinged to the frame 1. One end of the counterweight chain 316 is connected to the output end of the counterweight cylinder 314, and the other end of the counterweight chain 316 passes around the top sprocket 315 and is connected to the end of the second swing frame 301 away from the first alignment mechanism 5. The counterweight cylinder 314 can assist the swinging of the second swing frame 301 by pulling the counterweight chain 316 wound around the top sprocket 315. Furthermore, the counterweight cylinder 314 and the hydraulic cylinder 304 serve as a double safety measure to ensure the stability of the position of the second swing frame 301 and prevent the second swing frame 301 from suddenly falling and causing danger if one of them loses pressure and fails.

[0061] The guide plate 317 is fixedly installed on the swing frame 301 and located at the top of the support surface 305. The distance between the guide plate 317 and the support surface 305 gradually decreases from the direction away from the first alignment mechanism 5, and the edge of the guide plate 317 away from the first alignment mechanism 5 is set towards the bottom edge of the upper pressure roller 303. Based on Figure 5As shown, when the swing frame 301 rotates to a downward tilt, the transported veneer 100 may become suspended in mid-air and will not contact the support surface 305. This could prevent the veneer 100 from being aligned and transported into the transport path between the upper pressure roller 303 and the lower conveyor roller 302. The guide plate 317 can guide the tilted veneer 100 into the transport path between the upper pressure roller 303 and the lower conveyor roller 302.

[0062] Furthermore, based on Figure 3 , Figure 8 and Figure 9 As shown, the swing frame 2 301 also includes a pressure roller beam 2 319, a threaded inner rod 2 320, an external threaded rod 2 321, a limiting nut 2 322, a locking nut 2 323, and a spring 2 324. The swing frame 2 301 is fixedly mounted with a main frame 2 318 located directly above the lower conveyor roller 302. One side of the main frame 2 318 has an extension end 2 325 facing the bottom, and the other side of the main frame 2 318 has a vertically opened threaded through hole 2 326. The external threaded rod 2 321 is threaded through the threaded through hole 2 326. A through hole 2 327 is opened inside the external threaded rod 2 321 along the axial direction. The threaded inner rod 2 320 slides through the through hole 2 327 and is clearance-fitted with the through hole 2 327. The limiting nut 2 322 is screwed into the... The inner thread rod 320 extends out of the top of the through hole 327 and abuts against the top edge of the outer thread rod 321. The locking nut 323 is screwed onto the outside of the outer thread rod 321 and abuts against the bottom edge of the threaded through hole 326. The outer wall of the bottom end of the inner thread rod 320 is provided with a step 328. The spring 324 is sleeved on the outside of the inner thread rod 320 and is clamped between the step 328 and the bottom end of the outer thread rod 321. The pressure roller beam 319 is spaced at the bottom of the main frame 318. The upper pressure roller 303 is installed at the bottom of the pressure roller beam 319. One end of the pressure roller beam 319 is hinged to the extension end 325, and the other end of the pressure roller beam 319 is hinged to the bottom end of the inner thread rod 320.

[0063] The inner threaded rod 320 can slide up and down along the outer threaded rod 321. When the veneer 100 is transported between the upper pressure roller 303 and the lower conveyor roller 302, the upper pressure roller 303 is subjected to an upward force from the veneer 100, causing the pressure roller beam 319 to rotate upward along the extension end 325, and the inner threaded rod 320 to slide upward along the through hole 327, compressing the spring 324. The compressed spring 324 exerts a downward reaction force on the pressure roller beam 319, causing the upper pressure roller 303 to press the veneer 100. Through the above arrangement, the upper pressure roller 303 has a certain vertical movement margin relative to the main frame 318 to accommodate veneers 100 of different thicknesses and to ensure the pressing of the veneer 100. By screwing the outer threaded rod 321, the initial internal force of the spring 324 can be adjusted to adjust the pressing force on the veneer 100 according to its thickness. Locking nut 323 secures the external threaded rod 321, preventing it from loosening during operation. Locking nut 323 can abut against either the bottom or top edge of the threaded through hole 326, achieving the same effect. The threaded inner rod 320 has a clearance fit with the through hole 327, allowing for a certain amount of horizontal movement to accommodate the lateral displacement at the end of the pressure roller beam 319 during rotation, preventing jamming.

[0064] In actual use, based on Figure 3 and Figure 5 As shown, a photoelectric sensor 329 is installed on the side of the swing frame 301 near the lower conveyor roller 302. The photoelectric sensor 329 faces the support surface 305 and is connected to the control device. Initially, the swing frame 301 corresponds to a certain layer of the layered conveying device 4. The single board 100 moves through the lower conveyor roller 302 and the upper pressure roller 303 and is delivered to the layered conveying device 4. During transportation, the single board 100 will block the detection path of the photoelectric sensor 329. After the single board 100 is delivered, it moves out of the path of the photoelectric sensor 329. The photoelectric sensor 329 transmits the signal that the single board 100 has moved out to the control device. After receiving the signal for a specific time, the control device controls the hydraulic cylinder 304 to extend or retract, so that the swing frame 301 swings and aligns with other layers of the layered conveying device 4. The program placed in the control device within the aforementioned specific time period is determined by the distance between the photoelectric sensor 329 and the corresponding layer of the layered conveying device 4, as well as the transmission speed of the single board 100, to ensure that the photoelectric sensor 329 allows time for the single board 100 to fully move to the layered conveying mechanism after detecting that the single board 100 has moved out. The time required for the swing frame 301 to align from one layer of the layered conveying device 4 to another layer is set to be less than the time interval between the transport of two single boards 100, so as to avoid the next single board 100 arriving when the swing frame 301 is aligned to the next layer of the layered conveying device 4.

[0065] Furthermore, based on Figure 10 , Figure 11 and Figure 12 As shown, the layered conveying device 4 includes several layers of roller conveyors 401 arranged vertically and horizontally on the frame 1. Specifically, in this embodiment, four layers of roller conveyors 401 are provided. The feed end of each layer of roller conveyors 401 is opposite to the discharge end of the tilting table material distribution mechanism 3 to receive the single boards 100 transported by the tilting table material distribution mechanism 3. Based on the above structure, each layer of roller conveyors 401 is equipped with a second alignment mechanism 402. Each layer of roller conveyor 401 has a mounting frame 403 as a supporting body. Each set of second alignment mechanisms 402 includes a blocking cylinder 404 and a swing frame 405. The middle part of the swing frame 405 is hinged to the mounting frame 403. The blocking cylinder 404 is located at the bottom of the corresponding mounting frame 403. The base of the blocking cylinder 404 is hinged to the mounting frame 403. The output end of the blocking cylinder 404 is hinged to the bottom end of the swing frame 405. The top of the swing frame 405 has a blocking part 406. Each layer of roller conveyor 401 includes a drive motor 407 controlled by a control device. The blocking cylinder 404 is controlled by the control device. The blocking cylinder 404 can drive the swing frame 405 to rotate and cause the blocking part 406 to extend out of the top between two adjacent rollers of the roller conveyor 401 and block the material conveying path. Specifically, in this embodiment, the blocking cylinder 404 is horizontally disposed at the bottom of the corresponding mounting bracket 403. When the blocking cylinder 404 retracts, based on... Figure 11 As shown, the swing frame 405 rotates, causing the blocking part 406 to extend beyond the top between two adjacent rollers of the roller conveyor 401, blocking the transported veneer 100 and preventing it from continuing to move forward. When the blocking cylinder 404 extends, based on... Figure 12 As shown, the rotation of the swing frame 405 causes the blocking part 406 to descend to the bottom of the top edge between two adjacent rollers of the roller conveyor 401, and the single plate 100 can continue to move under the drive of the roller conveyor 401.

[0066] After the veneer 100 moves from the slab distribution mechanism 3 to the roller conveyor 401 in the layered conveying device 4, the veneer 100 may become skewed again due to the up-and-down swing of the swing frame 301. With the above-mentioned arrangement, when the veneer 100 is transported to one of the roller conveyors 401, the blocking cylinder 404 drives the blocking part 406 to extend out of the top between two adjacent rollers of the roller conveyor 401 and block the material conveying path, so that the veneer 100 is blocked and straightened by the blocking part 406. The blocking cylinder 404 drives the blocking part 406 to descend to the bottom of the top edge between two adjacent rollers of the roller conveyor 401, and the veneer 100 continues to move towards the dryer.

[0067] In practical use, based on Figure 11 and Figure 12 As shown, a second photoelectric sensor 408 is mounted on the mounting frame 403. The second photoelectric sensor 408 is located on the side of the swing frame 405 facing the swing table material distribution mechanism 3, and is positioned facing the conveying surface of the roller conveyor 401. The second photoelectric sensor 408 is connected to the control device via signal. In the initial state, the blocking part 406 extends out from the top between two adjacent rollers of the roller conveyor 401 and blocks the material conveying path. When the single board 100 is transported to the detection path of the second photoelectric sensor 408, it indicates that the single board 100 is about to contact and align with the blocking part 406. The second photoelectric sensor 408 transmits a signal to the control device. After a specific time, the control device controls the blocking cylinder 404 to extend, causing the blocking part 406 to retract to the bottom between two adjacent rollers of the roller conveyor 401. After the single board 100 is aligned, it can continue to move towards the dryer. The time period specified in the control device is determined by the distance between the photoelectric sensor 408 and the blocking part 406, and the transmission speed of the roller conveyor 401. This ensures that after the photoelectric sensor 408 detects the board 100, it allows time for the board 100 to move and contact the blocking part 406. Once the board 100 moves out of the detection path of the photoelectric sensor 408, the photoelectric sensor 408 transmits a signal to the control device. After the specified time has elapsed, ensuring that the board 100 has completely passed the blocking part 406, the control device controls the blocking cylinder 404 to retract, causing the blocking part 406 to extend beyond the top between two adjacent rollers of the roller conveyor 401 to receive the next board 100.

[0068] Furthermore, based on Figures 13 to 20 As shown, the negative pressure conveying device 2 includes a lifting adsorption device 201 and a conveying adsorption device 202; the lifting adsorption device 201 is located between the conveying adsorption device 202 and the first alignment mechanism 5.

[0069] The lifting adsorption device 201 includes a fan 203, an adsorption tube 204, a deformation compensation tube 205, and a lifting cylinder 206. The frame 1 is equipped with a vertical slide rail 207. The fan 203 is fixedly installed on the frame 1. The adsorption tube 204 is slidably arranged on the vertical slide rail 207. One end of the lifting cylinder 206 is fixedly connected to the frame 1, and the other end of the lifting cylinder 206 is hinged to the outer wall of the adsorption tube 204. The top end of the adsorption tube 204 is connected to the air inlet of the fan 203 through the deformation compensation tube 205. The bottom end of the adsorption tube 204 serves as an adsorption port 208 for adsorbing the single board 100. The fan 203 and the lifting cylinder 206 are both controlled by a control device. Specifically, in this embodiment, the fan 203 is a centrifugal fan, and the deformation compensation pipe 205 is a deformable pipe used to compensate for the positional changes between the adsorption pipe 204 and the fan 203 when the adsorption pipe 204 moves up and down, ensuring the connection between the adsorption pipe 204 and the fan 203 during positional changes. Compensation can be achieved through both extension and contraction, and through flexible deformation. In this embodiment, the deformation compensation pipe 205 is a corrugated pipe, which can achieve both length extension and contraction, and also has the ability to flexibly bend and deform.

[0070] The conveying and adsorption device 202 includes a support frame 209, a second fan 210, a third drive motor 211, and several transverse conveying rollers 212. The support frame 209 is fixedly connected to the frame 1 and has several mounting cavities 213, in which the transverse conveying rollers 212 are mounted. Each mounting cavity 213 can accommodate one or more transverse conveying rollers 212. The axis of each transverse conveying roller 212 extends horizontally along the direction perpendicular to the arrangement of the lifting adsorption device 201 and the conveying adsorption device 202, and several transverse conveying rollers 212 are arranged horizontally along the arrangement direction of the lifting adsorption device 201 and the conveying adsorption device 202. The bottom side of the transverse conveying roller 212 extends out of the bottom of the support frame 209. The drive motor 211 is fixedly installed on the frame 1 and is connected to the transmission of several transverse conveying rollers 212. The air inlet end of the fan 210 is located at the top of the support frame 209. There is a ventilation gap 214 between the transverse conveying roller 212 and the inner wall of the mounting cavity 213. The bottom end of the ventilation gap 214 serves as the adsorption port 215, which extends to the bottom of the support frame 209. The top end of the ventilation gap 214 is connected to the air inlet end of the fan 210. The fan 210 and the drive motor 211 are controlled by a control device.

[0071] In use, adsorption port 208 is located at the top edge of the single panel 100. The lifting cylinder 206 drives the adsorption tube 204 to slide along the vertical slide rail 207. The adsorption tube 204 moves vertically downwards, bringing adsorption port 208 close to the top edge of the single panel 100. Under the negative pressure suction of the fan 203, the edge of the single panel 100 is adsorbed by adsorption port 208. Subsequently, driven by the lifting cylinder 206, the adsorption tube 204 moves vertically upwards, causing the single panel 100 to be tilted and lifted from one side of the edge. When the single panel 100 rises close to the top of adsorption port 208 and approaches adsorption port 215, adsorption port 215 completely adsorbs and lifts the single panel 100, achieving overall adsorption of the single panel 100. After being lifted, the single panel 100 is directly aligned with the passage 506 in the first alignment mechanism 5. Because the single-board 100 is lifted by the single-board negative pressure feeding device using an oblique adsorption method, compared to directly adsorbing the middle of the single-board 100, the instantaneous separation resistance between two adjacent single-board 100s that needs to be overcome is reduced, thus lowering the adsorption force required to lift the single-board 100. The second fan 210 is an axial flow fan, and the negative pressure generated by the second fan 210 directly acts on the adsorption port 215 through the ventilation gap 214. Of course, in the case where multiple transverse conveying rollers 212 are installed in a single mounting cavity 213, the gap between two adjacent transverse conveying rollers 212 also serves as the aforementioned ventilation gap 214. After the single-board 100 is adsorbed by the second adsorption port 215, the single-board 100 directly contacts the bottom side of the transverse conveying roller 212. The transverse conveying roller 212 rotates under the drive of the third drive motor 211, realizing the transverse transport of the single-board 100. The entire transverse conveying mechanism can achieve the transverse transport of the single-board 100 without moving laterally with it, thus reducing the energy consumption of the entire device.

[0072] In this embodiment, the drive motor 211 and the transverse conveyor roller 212 are connected by chain drive. Of course, in other embodiments, the drive motor 211 can also be connected by gear drive or belt drive.

[0073] Meanwhile, in this embodiment, based on Figure 15 and Figure 20As shown, due to the relatively long extension length of the single-board stack along the X-axis, multiple adsorption tubes 204 need to be arranged along the X-axis to achieve adsorption of the single board 100. The top of each group of adsorption tubes 204 is connected to the same ventilation tube 217 through a deformation compensation tube 205, and then connected to the air inlet of the fan 203, so that multiple adsorption tubes 204 can share the fan 203, reducing the number of fans 203 used. At the same time, in order to reduce the number of lifting cylinders 206, two adjacent adsorption tubes 204 are grouped together, and each group of adsorption tubes 204 shares one lifting cylinder 206. Specifically, the lifting cylinder 206 is located directly above the middle of the two adsorption tubes 204, and the bottom output end of the lifting cylinder 206 is hinged to the sliding frame 216. Each group of two adsorption tubes 204 are fixedly installed on the sliding frame 216, and the sliding frame 216 is slidably arranged on the slide rails corresponding to the two adsorption tubes 204 along both sides of the X-axis. In this way, the lifting cylinder 206 drives the sliding frame 216 to move vertically along the slide rail, which can simultaneously drive the two adsorption tubes 204 to rise and fall.

[0074] Furthermore, in this embodiment, based on Figure 19 As shown, fan 210 is an axial flow fan. Similarly, since the single board stack extends a long length along the X-axis, multiple fans 210 need to be arranged along the X-axis to extend the length of the single board 100 that can be adsorbed. This is suitable for longer single boards 100 or multiple single board stacks can be stacked along the arrangement direction of fans 210 to adsorb multiple single boards 100 at the same time, thereby improving work efficiency.

[0075] In actual use, based on Figure 4As shown, the frame 1 is also equipped with a photoelectric sensor 330 located between the first alignment mechanism 5 and the lifting adsorption device 201. The photoelectric sensor 330 is located at the bottom of the passage 506 and faces the passage 506. The photoelectric sensor 330 is connected to the control device via signal. In the initial state, the shielding wall 507 blocks the passage 506 on the side away from the negative pressure conveying device 2. When the single board 100 is transported by the conveying adsorption device 202 to the detection path of the photoelectric sensor 330, it indicates that the single board 100 is about to contact and align with the shielding wall 507. The photoelectric sensor 330 transmits a signal to the control device, and the control device controls the swing cylinder 503 to extend after a specific time, causing the shielding wall 507 to rotate and disengage from the passage 506. The single board 100, after being aligned by the shielding wall 507, can continue to move. The program placed in the control device within the aforementioned specific time period is determined by the distance between the photoelectric sensor 330 and the shielding wall 507, as well as the transmission speed of the single board 100, to ensure that after the photoelectric sensor detects the single board 100, time is allowed for the single board 100 to move and contact the shielding wall 507. When the single board 100 moves out of the detection path of the photoelectric sensor 330, the photoelectric sensor 330 transmits a signal to the control device. After the aforementioned specific time has elapsed, ensuring that the single board 100 has completely passed the shielding wall 507, the control device controls the swing cylinder 503 to retract, causing the shielding wall 507 to once again block the passage 506 on the side away from the negative pressure conveying device 2, thus receiving the next single board 100.

[0076] Furthermore, based on Figure 1 and Figure 2 As shown, the system also includes a lifting platform 6, a first chain conveyor 7, and two sets of second chain conveyors 8. The lifting platform 6 is located at the bottom of the negative pressure conveying device 2, and the two sets of second chain conveyors 8 are located on both sides of the lifting platform 6, that is, on both sides of the lifting platform 6 along the Y-axis. The discharge ends of the first chain conveyor 7 are opposite to the infeed ends of the two sets of second chain conveyors 8, and the first chain conveyor 7 and the two sets of second chain conveyors 8 are arranged along the X-axis. The lifting platform 6, the first chain conveyor 7, and the two sets of second chain conveyors 8 are all controlled by a control device.

[0077] In use, the lifting platform 6 is lowered below the chain conveyor 8. After the veneer stack is transported from the chain conveyor 7 to the chain conveyor 8, the two sides of the veneer stack along the Y-axis are supported by the two sets of chain conveyors 8 respectively. The lifting platform 6 then rises and lifts the veneer stack close to the negative pressure conveying device 2, which can then pick up and transport the veneers 100 one by one from the lifting platform 6.

[0078] In actual use, based on Figure 1 and Figure 2As shown, a photoelectric sensor 601 is horizontally mounted on the frame 1, facing the top edge of the veneer stack. This sensor detects the position of the topmost veneer in the stack. The photoelectric sensor 601 is connected to the control device. The photoelectric sensor 601 is always aligned with the topmost veneer 100. When the topmost veneer 100 is lifted by the lifting and adsorption device 201 and removed from the detection path of the photoelectric sensor 601, the sensor transmits a signal to the control device. The control device then raises the lifting platform 6 to align the next veneer 100 with the detection path of the photoelectric sensor 601. Once the photoelectric sensor 601 detects the next veneer 100 is in position, it transmits another signal to the control device, which then stops the lifting platform 6 from rising. This ensures that the height of the topmost veneer 100 in the stack remains consistent, guaranteeing that the adsorption port 208 always matches the height of the veneer 100 after it descends.

[0079] Meanwhile, a photoelectric sensor 801 is installed on the chain conveyor 28. The photoelectric sensor 801 is located inside the chain conveyor 28 with its detection path facing upwards. The photoelectric sensor 801 is connected to the control device. Initially, the lifting platform 6 is lowered below the conveying surface of the chain conveyor 28. When the veneer stack moves from the chain conveyor 17 onto the chain conveyor 28, the photoelectric sensor 801 detects that the veneer stack has moved into position and transmits a signal to the control device. The control device then controls the lifting platform 6 to rise, and the chain conveyor 17 stops transporting the veneer stack. When the lifting platform 6 rises to the point where the top veneer 100 aligns with the photoelectric sensor 601, the photoelectric sensor 601 sends a signal to the control device, and the lifting platform 6 stops rising. As the negative pressure conveying device 2 transports the veneers 100 on the veneer stack, the height of the lifting platform 6 gradually increases. After the single-board stack on the lifting platform 6 has been completely transferred by the negative pressure conveyor 2, the photoelectric sensor 801 detects that the single-board stack on the lifting platform 6 has completely left its path. The photoelectric sensor 801 sends a signal to the control device, which controls the lifting platform 6 to descend to a level lower than the conveying surface of the chain conveyor 8, and the chain conveyor 7 starts to receive the next single-board stack.

[0080] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A veneer dryer feeding and distributing device, comprising a frame and a control device, wherein a negative pressure conveying device, a tilting table distributing mechanism and a layered conveying device are sequentially arranged on the frame along the horizontal conveying direction of the veneer, and the negative pressure conveying device, the tilting table distributing mechanism and the layered conveying device are all controlled by the control device; Its features are: A first alignment mechanism is provided between the negative pressure conveying device and the swaying table material distribution mechanism; the first alignment mechanism includes a drive motor, a lower support roller, a swing drive device, a swing frame, and a swing roller; the lower support roller is mounted on the frame, the drive motor is connected to the lower support roller, the swing frame is swayed and mounted on the frame via the swing drive device, the swing roller is mounted on the swing frame, and the swing roller is arranged in parallel on the top of the lower support roller, a passage for single boards to pass through is formed between the swing roller and the lower support roller, and the two sides of the passage are respectively aligned to the discharge end of the negative pressure conveying device and the inlet end of the layered conveying device; the drive motor and the swing drive device are both controlled by the control device. The swing frame has a shielding wall on the side facing the layered conveying device. By rotating along the frame, the shielding wall can block the passage on the side away from the negative pressure conveying device.

2. The single board dryer board feed distribution apparatus of claim 1 wherein: The swing drive device is a swing cylinder. The swing frame has an extension on the side opposite to the shielding wall. The base of the swing cylinder is hinged to the frame, and the output end of the swing cylinder is hinged to the extension.

3. The single board dryer board feed distribution apparatus of claim 2 wherein: The swing frame includes a main frame, a pressure roller beam, a threaded inner rod, an external threaded rod, a limiting nut, a locking nut, and a spring. The main frame is hinged to the machine frame, and the extension and the shielding wall are respectively fixedly arranged on both sides of the main frame. One side of the main frame has an extension end facing the bottom, and the other side of the main frame has a vertically threaded through hole. The external threaded rod is screwed through the threaded through hole. A through hole is opened inside the external threaded rod along its axial direction. The internal threaded rod slides through the through hole and is clearance-fitted with the through hole. A limiting nut is screwed onto the top of the internal threaded rod extending out of the through hole and abuts against the top edge of the external threaded rod. A locking nut is screwed onto the outside of the external threaded rod and abuts against the top or bottom edge of the threaded through hole. A step is provided on the outer wall of the bottom end of the internal threaded rod. A spring is sleeved on the outside of the internal threaded rod and clamped between the step and the bottom end of the external threaded rod. A pressure roller beam is spaced apart at the bottom of the main frame. A swing roller is installed at the bottom of the pressure roller beam. One end of the pressure roller beam is hinged to the extension end, and the other end is hinged to the bottom end of the internal threaded rod.

4. The single board dryer board feed distribution apparatus of claim 1 wherein: The swaying platform material distribution mechanism includes a second swaying frame, a lower conveyor roller, an upper pressure roller, and a hydraulic cylinder. The end of the second swaying frame facing the first alignment mechanism is hinged to the frame. The upper pressure roller and the lower conveyor roller are mounted parallel to each other at the end of the second swaying frame facing the layered conveying device. The first drive motor is connected to the lower conveyor roller. The base of the hydraulic cylinder is hinged to the frame, and the output end of the hydraulic cylinder is hinged to the second swaying frame. The top of the second swaying frame has a support surface. One end of the support surface is aligned with the passage, and the other end of the support surface is aligned with the top edge of the lower conveyor roller. The hydraulic cylinder is controlled by the control device.

5. The single board dryer board feed distribution apparatus of claim 4 wherein: It also includes chain one, chain two and tension sprocket rotatably mounted on the frame. The output end of the drive motor one is provided with sprocket one, the end of the lower support roller is provided with sprocket two, the end of the lower conveying roller is provided with sprocket three, and the swing frame two is rotatably mounted with sprocket four and sprocket five on the side facing the first alignment mechanism. Sprocket four and sprocket five are coaxially arranged and fixedly connected to each other. Chain 1 is closedly wrapped around sprocket 1, sprocket 2, sprocket 4 and tension sprocket, and chain 2 is closedly wrapped around sprocket 5 and sprocket 3.

6. The single board dryer board feed distribution apparatus of claim 4 wherein: The tilting platform material distribution mechanism also includes a counterweight cylinder, a top sprocket, a counterweight chain, and a guide plate; The top sprocket is mounted on the frame and located on top of the second swing frame. The base of the counterweight cylinder is hinged to the frame. One end of the counterweight chain is connected to the output end of the counterweight cylinder, and the other end of the counterweight chain passes around the top sprocket and is connected to the end of the second swing frame away from the first alignment mechanism. The guide plate is fixedly installed on the swing frame 2 and located at the top of the support surface. The distance between the guide plate and the support surface gradually decreases from the direction away from the first alignment mechanism, and the edge of the guide plate away from the first alignment mechanism is set towards the bottom edge of the upper pressure roller.

7. The single board dryer board feed distribution apparatus of claim 4 wherein: The second swing frame also includes a second pressure roller beam, a second threaded inner rod, a second threaded outer rod, a second limiting nut, a second locking nut, and a second spring. The second swing frame is fixedly installed with a second main frame located directly above the lower conveyor roller. One side of the main frame two has an extension end two facing the bottom, and the other side of the main frame two has a vertically opened threaded through hole two. The external threaded rod two is screwed through the threaded through hole two. A through hole two is opened inside the external threaded rod two along the axial direction. The internal threaded rod two slides through the through hole two and is clearance-fitted with the through hole two. The limiting nut two is screwed on the top end of the internal threaded rod two extending from the through hole two and abuts against the top edge of the external threaded rod two. The locking nut two is screwed on the external threaded rod two. The outer side of the threaded rod two abuts against the top or bottom edge of the threaded through hole two. The outer side wall of the bottom end of the threaded inner rod two is provided with a step two. The spring two is sleeved on the outer side of the threaded inner rod two and is clamped between the step two and the bottom end of the external threaded rod two. The pressure roller beam two is spaced apart at the bottom of the main frame two. The upper pressure roller is installed at the bottom of the pressure roller beam two. One end of the pressure roller beam two is hinged to the extension end two, and the other end of the pressure roller beam two is hinged to the bottom end of the threaded inner rod two.

8. The single board dryer board feed distribution apparatus of claim 1 wherein: The layered conveying device includes several layers of roller conveyors arranged vertically and horizontally on the frame. The feed end of each layer of roller conveyor is opposite to the discharge end of the tilting table material distribution mechanism. Each layer of roller conveyor is equipped with a second alignment mechanism. Each layer of the roller conveyor has a mounting frame as a supporting body. Each group of second alignment mechanisms includes a blocking cylinder and a swing frame three. The middle part of the swing frame three is hinged to the mounting frame. The blocking cylinder is located at the bottom of the corresponding mounting frame. The base of the blocking cylinder is hinged to the mounting frame. The output end of the blocking cylinder is hinged to the bottom end of the swing frame three. The top end of the swing frame three has a blocking part. Each layer of the roller conveyor includes a drive motor two controlled by the control device. The blocking cylinder is controlled by the control device. The blocking cylinder can drive the swing frame to rotate, and cause the blocking part to extend from the top between two adjacent rollers of the roller conveyor and block the material conveying path.

9. The single board dryer board feed distribution apparatus of claim 1 wherein: The negative pressure conveying device includes a lifting adsorption device and a conveying adsorption device; the lifting adsorption device is located between the conveying adsorption device and the first alignment mechanism. The lifting and adsorption device includes a fan, an adsorption tube, a deformation compensation tube, and a lifting cylinder. The frame is equipped with a vertical slide rail. The fan is fixedly installed on the frame. The adsorption tube is slidably disposed on the vertical slide rail. One end of the lifting cylinder is fixedly connected to the frame, and the other end of the lifting cylinder is hinged to the outer wall of the adsorption tube. The top end of the adsorption tube is connected to the air inlet of the fan through the deformation compensation tube. The bottom end of the adsorption tube serves as an adsorption port for adsorbing single boards. The fan and the lifting cylinder are both controlled by the control device. The conveying and adsorption device includes a support frame, a second fan, a third drive motor, and several transverse conveying rollers. The support frame is fixedly connected to the frame and has several mounting cavities. The transverse conveying rollers are mounted in the mounting cavities. The axis of each transverse conveying roller extends horizontally along the direction perpendicular to the arrangement of the lifting and adsorption device and the conveying and adsorption device. The several transverse conveying rollers are arranged horizontally along the arrangement direction of the lifting and adsorption device and the conveying and adsorption device. The bottom side of the transverse conveying rollers extends out of the bottom of the support frame. The third drive motor is fixedly mounted on the frame and is connected to the several transverse conveying rollers in a driving connection. The air inlet of the second fan is located at the top of the support frame. There is a ventilation gap between the transverse conveying roller and the inner wall of the mounting cavity. The bottom end of the ventilation gap serves as the second adsorption port, extending to the bottom of the support frame. The top end of the ventilation gap is connected to the air inlet of the second fan. The second fan and the third drive motor are controlled by the control device.

10. The single board dryer board feed distribution apparatus of claim 1 wherein: It also includes a lifting platform, a first chain conveyor, and two sets of second chain conveyors. The lifting platform is located at the bottom of the negative pressure conveying device, and the two sets of second chain conveyors are located on both sides of the lifting platform. The discharge end of the first chain conveyor is opposite to the inlet end of the two sets of second chain conveyors. The lifting platform, the first chain conveyor, and the two sets of second chain conveyors are all controlled by the control device.

Images