Full-automatic plywood conveying and turning and stacking device

Abstract

A fully automatic plywood palletizing device includes a first conveyor frame, a flipping frame, a second conveyor frame, and a palletizing frame. The palletizing frame includes a cover plate and a stacking plate disposed below the cover plate. A movable frame, driven by a driver, is located at the bottom of the cover plate. Plywood from the second conveyor frame to the movable frame is stacked layer by layer on the stacking plate from bottom to top by the driver's reciprocating motion. The palletizing frame of this invention employs a movable frame design, controlling the reciprocating motion via a driver to achieve layer-by-layer stacking of plywood from bottom to top, effectively reducing the driving load, minimizing mechanical wear, and extending equipment life. Simultaneously, the flipping frame enables automatic flipping of the plywood, facilitating double-sided visual inspection, improving inspection efficiency and accuracy. Furthermore, an integrated tapping feedback unit within the flipping frame can detect hollow defects in the plywood during conveying, enhancing product quality control.

Description

Technical Field

[0001] This invention belongs to the field of plywood processing technology, specifically referring to a fully automatic plywood conveying and stacking device. Background Technology

[0002] Plywood production uses logs as raw materials, which are cut, peeled, and rotary-cut into veneers. The moisture content is then controlled by automated drying. After being spliced ​​using a full-joint splicing method, the veneers are glued together and formed through multiple processes such as cold pressing, hot pressing, and curing. The appearance inspection of the front and back of the plywood is crucial. It is necessary to ensure that the surface is flat and smooth, without defects such as bubbles, delamination, peeling, and cracks. These indicators directly affect the physical properties, processing performance, and safety of use of plywood, and are key links in controlling product quality and meeting the needs of furniture manufacturing and building decoration.

[0003] After inspection, plywood needs to be stacked for subsequent packaging. Currently, a lifting stacking device is installed at the exit of the inspection process. After inspection, the plywood is directly transported to the stacking device, which descends layer by layer so that subsequent plywood can be stacked upwards. Although the stacking is relatively neat and stable, the load on the lifting device will gradually increase. This will accelerate the wear of mechanical parts, reduce the life of the equipment, and the motor is also prone to overload operation, resulting in overheating and damage, becoming an unstable factor in the stacking process. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the purpose of the present invention is to provide a fully automatic plywood conveying and stacking device, so as to at least partially solve the problems mentioned in the background art.

[0005] The technical solution adopted by this invention is as follows: A fully automatic plywood conveying and stacking device is proposed, comprising: First and second conveyor frames for conveying plywood; A flipping frame is set between the first conveyor frame and the second conveyor frame, and receives the plywood conveyed on the first conveyor frame, flips the plywood 180 degrees and then conveys it to the second conveyor frame; A palletizing rack is installed on the output side of the second conveyor rack; The palletizing rack includes a cover plate and a stacking plate disposed below the cover plate. The bottom of the cover plate is provided with a movable frame that is driven to move up and down reciprocally by a driver. When the movable frame is at the bottom of the cover plate, it is set to an initial position. The initial position of the movable frame is at the same height as the plywood output from the second conveyor frame. The plywood output from the second conveyor frame to the movable frame is stacked layer by layer on the stacking plate from bottom to top by the up and down reciprocating drive of the driver.

[0006] Furthermore, the movable frame is configured as a "C"-shaped frame body. The opening side of the movable frame faces the entry direction of the plywood. On the inner side wall of the movable frame, there is a flap support for carrying the plywood. At a position corresponding to the flap support on the inner side wall of the movable frame, there is a relief groove. The flap support is elastically hinged on the inner wall of the movable frame. The movement of the flap support on the movable frame includes a first position and a second position. In the first position, the flap support is perpendicular to the inner side wall of the movable frame and is used to carry the plywood. In the second position, the flap support retracts into the relief groove, enabling the plywood to disengage from the movable frame.

[0007] Furthermore, a torsion spring is installed between the flap support and the movable frame. The torsion spring is configured such that the flap support and the movable frame are perpendicular to each other in the first position. And when the movable frame moves downward and contacts the pallet or the plywood stacked on the pallet below, it flips upward to the second position, causing the plywood inside the movable frame to disengage from the support of the flap support and stack on the pallet or plywood from inside the movable frame.

[0008] Furthermore, the driver includes a driving motor fixedly arranged on the top of the cover plate. The output shaft of the driving motor is fixedly connected to a丝杆 (the specific Chinese term for the screw rod needs to be determined according to the actual context, here it is temporarily replaced with "丝杆"). There is a sliding sleeve on the movable frame that meshes and cooperates with the丝杆. When the driving motor drives the丝杆 to rotate, it带动 the movable frame to move along the axis direction of the丝杆. At the bottom of the cover plate, there are limiting guide rods parallel to the丝杆. The limiting guide rods are distributed on both sides of the pallet and are used to limit the stacking path of the plywood on the pallet.

[0009] Furthermore, the flipping frame includes conveying clamping plates, a linkage ring, and driving rollers. The conveying clamping plates include a first clamping plate, a second clamping plate, and a third clamping plate that are distributed in parallel. A first conveying channel is formed between the first clamping plate and the second clamping plate, and a second conveying channel is formed between the second clamping plate and the third clamping plate. The conveying clamping plates are fixed inside the linkage ring. The driving rollers are arranged at the bottom of the linkage ring and are used to drive the linkage ring to rotate, enabling the first conveying channel and the second conveying channel to alternately receive the plywood from the first conveying frame and convey it to the second conveying frame.

[0010] Furthermore, on one side surface of the first clamping plate, the second clamping plate, and the third clamping plate that contacts the plywood, there are a plurality of uniformly distributed conveying rollers. The conveying rollers are configured to drive the plywood to move along the conveying direction of the plywood.

[0011] Furthermore, the conveying rollers are arranged in a matrix on the conveying clamp, and a tapping feedback unit is provided between the conveying rollers. The tapping feedback unit is configured to tap the surface of the plywood passing through the first conveying channel or the second conveying channel at a set frequency, and record the feedback force after tapping the plywood to judge whether the plywood is hollow.

[0012] Furthermore, a first appearance inspection station and a second appearance inspection station are respectively provided on one side of the first conveyor frame and the second conveyor frame. The first appearance inspection station and the second appearance inspection station are respectively used to detect whether there are defects in the appearance of the front and back of the plywood.

[0013] Furthermore, the second conveyor frame includes a conveyor frame body and a limiting baffle and a pusher mounted on the conveyor frame body. The conveyor frame body is configured to convey the plywood along a first direction. The limiting baffle is configured to be driven to rise and fall, and when the limiting baffle is raised, it is used to block the plywood from moving along the first direction. The pusher is configured to push the plywood along a second direction, which is perpendicular to the first direction.

[0014] Furthermore, the palletizing rack includes a first palletizing rack and a second palletizing rack, which are used for stacking good products and bad products, respectively. The qualified plywood is directly conveyed to the first palletizing rack for stacking via the second conveyor rack, while the unqualified plywood is pushed to the second palletizing rack for stacking via the pusher.

[0015] Beneficial effects: The palletizing rack of this invention adopts a movable frame design, which controls the up-and-down reciprocating motion through a driver to realize the layer-by-layer stacking of plywood from bottom to top, effectively reducing the driving load, reducing mechanical wear, and extending the equipment life. At the same time, a flipping frame is set to realize the automatic flipping of plywood, which facilitates double-sided appearance inspection, improves inspection efficiency and accuracy, and integrates a knocking feedback unit in the flipping frame, which can detect hollow defects in plywood during transportation, thereby improving the level of product quality control. Attached Figure Description

[0016] Figure 1 This is a top view of a fully automatic plywood conveying and stacking device according to an embodiment of the present invention. Figure 2 This is a three-dimensional structural diagram of a fully automatic flip-board palletizing device for plywood conveying according to an embodiment of the present invention; Figure 3 A schematic diagram of the structure of the first conveyor frame, the tilting frame, and the second conveyor frame is provided for embodiments of the present invention; Figure 4 This is a schematic diagram of the inner structure of the conveying clamp according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the end face structure of the flipping frame according to an embodiment of the present invention; Figure 6 A schematic diagram of the palletizing rack is provided for an embodiment of the present invention.

[0017] Among them, 01, first appearance inspection station; 02, second appearance inspection station; 10, first conveyor frame; 20, flipping frame; 201, first conveying channel; 202, second conveying channel; 21, conveying clamp; 211, first clamp; 212, second clamp; 213, third clamp; 22, linkage ring; 23, drive roller; 24, conveying roller; 25, impact feedback unit; 30, second conveyor frame; 31, conveyor frame body; 311, rotating roller; 312, bracket; 32, limit baffle; 33, pusher; 40, stacking frame; 41, cover plate; 42, movable frame; 420, clearance groove; 421, flipping plate support; 43, stacking plate; 44, driver; 441, drive motor; 442, lead screw; 45, limit guide rod.

[0018] The accompanying drawings are provided to further understand the embodiments and form part of the specification. They are used together with the embodiments for explanation and do not constitute a limitation on the embodiments. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection.

[0020] In the description of the embodiments, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments.

[0021] After plywood inspection, it is typically stacked using a lifting palletizing device. This device stacks the boards layer by layer by descending, maintaining a neat and stable stack. However, as the number of stacked layers increases, the load on the lifting device rises continuously, easily accelerating wear on mechanical parts, shortening equipment lifespan, and potentially causing motor overload, overheating, or even damage, becoming an unstable factor in the stacking process. This invention provides a fully automatic flipping and palletizing device for plywood conveying, aiming to improve the service life of the palletizing device and the stability of plywood stacking. The device mainly includes a first conveyor frame 10, a flipping frame 20, a second conveyor frame 30, and a palletizing frame 40.

[0022] like Figure 1 and Figure 2 As shown, both the first conveyor frame 10 and the second conveyor frame 30 are used to convey plywood. The flipping frame 20 is located between the first conveyor frame 10 and the second conveyor frame 30 and is used to receive the plywood conveyed on the first conveyor frame 10, flip the plywood 180 degrees and then convey it to the second conveyor frame 30.

[0023] Furthermore, in order to inspect the plywood on the first conveyor frame 10 and the second conveyor frame 30, a first appearance inspection station 01 and a second appearance inspection station 02 are respectively provided on one side of the first conveyor frame 10 and the second conveyor frame 30. The first appearance inspection station 01 and the second appearance inspection station 02 are respectively used to inspect whether there are defects in the appearance of the front and back of the plywood.

[0024] In some embodiments, the first appearance inspection station 01 and the second appearance inspection station 02 may be selectively equipped with machine vision inspection or manual inspection, which are intended to inspect the appearance of the plywood to reject defective products. The flipping frame 20 can flip the plywood with the front side facing up on the first conveyor frame 10 by 180 degrees, so that the back side of the plywood is facing up and conveyed on the second conveyor frame 30. This facilitates appearance inspection of both sides of the plywood.

[0025] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the tilting frame 20 includes a conveying clamp 21, a linkage ring 22, and a drive roller 23.

[0026] The conveying clamp 21 includes a first clamp 211, a second clamp 212 and a third clamp 213 distributed in parallel. A first conveying channel 201 is formed between the first clamp 211 and the second clamp 212, and a second conveying channel 202 is formed between the second clamp 212 and the third clamp 213. Both conveying channels can be used to convey plywood.

[0027] Furthermore, the conveying clamp 21 is fixed to the inner side of the linkage ring 22, and the drive roller 23 is set at the bottom of the linkage ring 22 and is used to drive the linkage ring 22 to rotate, so that the first conveying channel 201 and the second conveying channel 202 alternately receive plywood from the first conveying frame 10 and convey it to the second conveying frame 30.

[0028] In some embodiments, the linkage ring 22 may be made of stainless steel profile welded together. Three conveying clamps 21 are fixed to the inner side of the linkage ring 22 by connectors, and the second clamp 212 in the middle position is fixed. The first clamp 211 and the third clamp 213 on the upper and lower sides are fixed in an adjustable manner to adjust the height of the conveying channel to accommodate the passage of plates of different thicknesses. The drive roller 23 is driven by a programmable servo motor to control the linkage ring 22 to rotate at a set speed. It can be adjusted according to the conveying speed of the plate to ensure that when the first conveying channel 201 and the second conveying channel 202 are in a horizontal position, they can receive the plywood conveyed on the first conveying frame 10 and convey the plywood to the second conveying frame 30.

[0029] like Figure 3 As shown, when the linkage ring 22 rotates to the point where both the first conveying channel 201 and the second conveying channel 202 are in a horizontal position, the first conveying frame 10 can convey plywood into the first conveying channel 201, while the plywood in the second conveying channel 202 is conveyed to the second conveying frame 30. After receiving and conveying, the linkage ring 22 rotates 180 degrees, causing the plywood received from the first conveying frame 10 in the first conveying channel 201 to flip up to face up, while the empty second conveying channel 202 continues to receive new plywood face up from the first conveying frame 10. In this way, through the repeated rotation of the linkage ring 22, the first conveying channel 201 and the second conveying channel 202 alternately receive / convey the plywood, thus completing the conveying of the plywood and increasing the speed of plywood flipping.

[0030] Furthermore, multiple evenly distributed conveying rollers 24 are provided on the side of the first clamping plate 211, the second clamping plate 212, and the third clamping plate 213 that are in contact with the plywood. The conveying rollers 24 are configured to drive the plywood to move along the conveying direction of the plywood. In some embodiments, the conveying rollers 24 may be rubber rollers, and the multiple conveying rollers 24 are linked together. The conveying speed of the conveying rollers 24 on the plywood is consistent with the conveying speed of the first conveying frame 10 and the second conveying frame 30, so as to maintain the uniform conveying of the plywood on the first conveying frame 10, the flipping frame 20, and the second conveying frame 30.

[0031] Further, in order to detect the hollowing condition of the plywood while turning it over, the conveying rollers 24 are arranged in a matrix on the conveying clamping plate 21. A knocking feedback unit 25 is provided between the conveying rollers 24. The knocking feedback unit 25 is configured to knock on the surface of the plywood passing through the first conveying channel 201 or the second conveying channel 202 at a set frequency and record the feedback force after knocking on the plywood, so as to judge whether the plywood is hollow.

[0032] In some embodiments, the knocking feedback unit 25 knocks on the surface of the plywood at a fixed frequency through a built-in electromagnetic hammer or a pneumatic knocking head. At the same time, the magnitude of the feedback force at the moment of knocking is recorded by a force sensor. When there are hollows (such as delamination or bubbles) inside the plywood, its structural stiffness decreases, and the feedback force generated by knocking will be significantly smaller than that of a normal board. By comparing the feedback force with a preset threshold, it can be judged whether the board surface is hollow, realizing online non-destructive detection.

[0033] In this way, the turning frame 20 realizes the continuous automatic turning of the plywood through the cooperation of the linkage ring 22 and the conveying clamping plate 21, which not only improves the turning efficiency, but also ensures the smooth progress of double-sided detection, thereby improving the overall detection accuracy and productivity. Among them, the knocking feedback unit 25 is integrated inside the turning frame 20, and the hollowing detection can be carried out synchronously during the conveying process, without additional workstations, saving space and time, and can detect internal defects early, avoiding defective products from flowing into subsequent processes and improving the product quality consistency.

[0034] As Figure 1 、 Figure 2 and Figure 6 shown, the palletizing rack 40 is arranged on the output side of the second conveying rack 30.

[0035] Among them, the palletizing rack 40 includes a cover plate 41 and a pallet board 43 arranged below the cover plate 41. A movable frame 42 driven by a driver 44 to reciprocate up and down is provided at the bottom of the cover plate 41. When the movable frame 42 is located at the bottom of the cover plate 41, it is set as the initial position. The initial position of the movable frame 42 is at the same height as the plywood output by the second conveying rack 30. The plywood output from the second conveying rack 30 to the movable frame 42 is stacked layer by layer on the pallet board 43 from bottom to top through the up and down reciprocating drive of the driver 44.

[0036] In some embodiments, the movable frame 42 is configured as a "C"-shaped frame body. The opening side of the movable frame 42 faces the entering direction of the plywood. A turning support 421 for carrying the plywood is provided on the inner side wall of the movable frame 42. Generally, the turning support 421 is configured as a rectangular thin plate. Correspondingly, a让位槽420 is provided on the inner side wall of the movable frame 42 corresponding to the turning support 421, so that the turning support 421 can be completely retracted into the让位槽420 after being turned up.

[0037] Furthermore, the flap support 421 is elastically hinged to the inner wall of the movable frame 42. The flap support 421 moves on the movable frame 42 in a first position and a second position. In the first position, the flap support 421 is perpendicular to the inner wall of the movable frame 42 and is used to support the plywood. In the second position, the flap support 421 retracts into the relief groove 420, so that the plywood can be detached from the movable frame 42.

[0038] In some embodiments, a torsion spring is installed between the flip plate support 421 and the movable frame 42. The torsion spring is configured such that the flip plate support 421 and the movable frame 42 are perpendicular to each other in a first position, and when the movable frame 42 moves downward and contacts the lower stack plate 43 or the plywood stacked on the stack plate 43, it flips upward to a second position, so that the plywood on the inner side of the movable frame 42 is detached from the support of the flip plate support 421 and is detached from the inner side of the movable frame 42 and stacked on the stack plate 43 or the plywood.

[0039] During operation, in the initial state, the flip plate support 421 is in a horizontal position and can support the board. When the board conveyed on the second conveyor frame 30 reaches the movable frame 42, the board passes over the top of the flip plate support 421 until it hits the inner frame of the movable frame 42 and is then stopped. Then, the driver 44 drives the movable frame 42 to move downward, so that the movable frame 42 carries the plywood and stacks it on the stack plate 43. During the downward movement, after the flip plate support 421 touches the object below, it flips upward and retracts into the clearance groove 420. Then, the plywood is detached from the flip plate support 421, and the plywood falls to complete the stacking.

[0040] In some embodiments, the driver 44 includes a drive motor 441 fixedly mounted on the top of the cover plate 41. The output shaft of the drive motor 441 is fixedly connected to the lead screw 442. The movable frame 42 is provided with a sliding sleeve that meshes with the lead screw 442. In use, the drive motor 441 drives the lead screw 442 to rotate, thereby causing the movable frame 42 to move along the axial direction of the lead screw 442.

[0041] Furthermore, a limiting guide rod 45 parallel to the lead screw 442 is fixedly provided at the bottom of the cover plate 41. The limiting guide rod 45 is distributed on both sides of the stack plate 43 to limit the stacking path of the plywood on the stack plate 43. Under the restriction of the limiting guide rod 45, the position of the plywood can be restricted to ensure the stability of the plywood during the stacking process.

[0042] like Figure 2 As shown, the second conveyor frame 30 includes a conveyor frame body 31 and a limiting baffle 32 and a pusher 33 installed on the conveyor frame body 31.

[0043] The conveyor frame 31 includes a rotating roller 311 and a support 312. Multiple rotating rollers 311 are installed parallel to each other on the top of the support 312. The multiple rotating rollers 311 are linked together and driven to rotate by a drive source. The conveyor frame 31 is configured to convey plywood along a first direction. The limiting baffle 32 is configured to be driven to rise and fall. When the limiting baffle 32 is raised, it is used to block the plywood from moving along the first direction. The pusher 33 is configured to push the plywood along a second direction, which is perpendicular to the first direction.

[0044] Furthermore, the palletizing rack 40 includes a first palletizing rack and a second palletizing rack. The first palletizing rack and the second palletizing rack are used to stack good products and bad products, respectively. Good plywood is directly conveyed to the first palletizing rack for stacking through the second conveyor rack 30, and bad plywood is pushed to the second palletizing rack for stacking through the pusher 33.

[0045] In some embodiments, both the limit baffle 32 and the pusher 33 are driven by cylinders and controlled by a controller. After receiving a defective product signal, the controller drives the limit baffle 32 and the pusher 33 to push the unqualified plywood into the second stacking rack, thus completing the classification of good and defective plywood.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] The embodiments have been described above, and such description is not restrictive. The figures shown are only one embodiment, and the actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit, such design should fall within the scope of protection.

Claims

1. A fully automatic flip-pallet stacking device for plywood conveying, characterized in that, Including: The first conveyor rack (10) and the second conveyor rack (30) for conveying plywood; The turnover rack (20) is arranged between the first conveyor rack (10) and the second conveyor rack (30), configured to receive the plywood conveyed on the first conveyor rack (10), and convey the plywood to the second conveyor rack (30) after turning it 180 degrees; The stacking rack (40) is arranged on the output side of the second conveyor rack (30); Wherein, the stacking rack (40) includes a cover plate (41) and a stacking plate (43) arranged below the cover plate (41), a movable rack (42) driven by a driver (44) to reciprocate up and down is arranged at the bottom of the cover plate (41), when the movable rack (42) is located at the bottom of the cover plate (41), it is set as the initial position, and the initial position of the movable rack (42) is at the same height as the plywood output by the second conveyor rack (30), and the plywood output from the second conveyor rack (30) to the movable rack (42) is stacked on the stacking plate (43) by the up and down reciprocating drive of the driver (44).

2. The fully automatic flip-pallet stacking device for plywood conveying according to claim 1, characterized in that: The movable rack (42) is constructed as a "C"-shaped frame body, the opening side of the movable rack (42) faces the entering direction of the plywood, a flap support (421) for carrying the plywood is arranged on the inner side wall of the movable rack (42), a让位槽 (420) is arranged on the inner side wall of the movable rack (42) corresponding to the flap support (421), the flap support (421) is elastically hinged on the inner wall of the movable rack (42), and the movement of the flap support (421) on the movable rack (42) includes a first position and a second position. In the first position, the flap support (421) is perpendicular to the inner side wall of the movable rack (42) for carrying the plywood. In the second position, the flap support (421) shrinks into the让位槽 (420) to enable the plywood to脱离 the movable rack (42).

3. The fully automatic flip-pallet stacking device for plywood conveying according to claim 2, characterized in that: A torsion spring is installed between the flap support (421) and the movable rack (42), and the torsion spring is configured to make the flap support (421) and the movable rack (42) perpendicular to each other and in the first position. When the movable rack (42) moves downward and contacts the stacking plate (43) below or the plywood stacked on the stacking plate (43), it flips upward to the second position, so that the plywood inside the movable rack (42)脱离 the support of the flap support (421) and stacks on the stacking plate (43) or the plywood after脱离 the inside of the movable rack (42).

4. The fully automatic flip-pallet stacking device for plywood conveying according to claim 1, characterized in that: The driver (44) includes a drive motor (441) fixedly mounted on the top of the cover plate (41). The output shaft of the drive motor (441) is fixedly connected to a lead screw (442). The movable frame (42) is provided with a sliding sleeve that meshes with the lead screw (442). When the drive motor (441) drives the lead screw (442) to rotate, it drives the movable frame (42) to move along the axial direction of the lead screw (442). The bottom of the cover plate (41) is fixedly provided with a limiting guide rod (45) parallel to the lead screw (442). The limiting guide rod (45) is distributed on both sides of the stack plate (43) to limit the stacking path of the plywood on the stack plate (43).

5. The fully automatic flipping and stacking device for plywood conveying according to claim 1, characterized in that: The flipping frame (20) includes a conveying clamp (21), a linkage ring (22), and a drive roller (23). The conveying clamp (21) includes a first clamp (211), a second clamp (212), and a third clamp (213) distributed in parallel. A first conveying channel (201) is formed between the first clamp (211) and the second clamp (212), and a second conveying channel (202) is formed between the second clamp (212) and the third clamp (213). The conveying clamp (21) is fixed to the inside of the linkage ring (22). The drive roller (23) is disposed at the bottom of the linkage ring (22) and is used to drive the linkage ring (22) to rotate, so that the first conveying channel (201) and the second conveying channel (202) alternately receive the plywood from the first conveying frame (10) and convey it to the second conveying frame (30).

6. The fully automatic flip-pallet stacking device for plywood conveying according to claim 5, characterized in that: The first clamping plate (211), the second clamping plate (212) and the third clamping plate (213) are each provided with a plurality of uniformly distributed conveying rollers (24) on the side surface in contact with the plywood. The conveying rollers (24) are configured to drive the plywood to move along the conveying direction of the plywood.

7. The fully automatic flip-pallet stacking device for plywood conveying according to claim 6, characterized in that: The conveying rollers (24) are arranged in a matrix on the conveying clamp (21). A tapping feedback unit (25) is provided between the conveying rollers (24). The tapping feedback unit (25) is configured to tap the surface of the plywood passing through the first conveying channel (201) or the second conveying channel (202) at a set frequency, and record the feedback force after tapping the plywood to judge whether the plywood is hollow.

8. The fully automatic flip-pallet stacking device for plywood conveying according to claim 7, characterized in that: The first conveyor frame (10) and the second conveyor frame (30) are respectively provided with a first appearance inspection station (01) and a second appearance inspection station (02) on one side. The first appearance inspection station (01) and the second appearance inspection station (02) are respectively used to detect whether there are defects in the appearance of the front and back of the plywood.

9. The fully automatic flip-pallet stacking device for plywood conveying according to claim 8, characterized in that: The second conveyor frame (30) includes a conveyor frame body (31) and a limiting baffle (32) and a pusher (33) mounted on the conveyor frame body (31). The conveyor frame body (31) is configured to convey the plywood in a first direction. The limiting baffle (32) is configured to be driven to rise and fall, and when the limiting baffle (32) rises, it is used to block the plywood from moving in the first direction. The pusher (33) is configured to push the plywood in a second direction, which is perpendicular to the first direction.

10. The fully automatic flip-pallet stacking device for plywood conveying according to claim 9, characterized in that: The palletizing rack (40) includes a first palletizing rack and a second palletizing rack. The first palletizing rack and the second palletizing rack are used to stack good products and bad products, respectively. The qualified plywood is directly conveyed to the first palletizing rack for stacking through the second conveyor rack (30), and the unqualified plywood is pushed to the second palletizing rack for stacking through the pusher (33).

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