A wood guard straightening device and photovoltaic module packaging line

Abstract

The present invention relates to the technical field of photovoltaic module packaging, and in particular to a wood guard straightening device and a photovoltaic module packaging line. The wood guard straightening device provided by the present invention includes: a first straightening seat and a second straightening seat are arranged opposite to each other, and the first straightening seat is provided with a first through slot, the second straightening seat is provided with a second through slot, the first through slot is parallel to the second through slot, the left and right sides of the first straightening seat are both provided with a bearing assembly, the left and right sides of the second straightening seat are both provided with a bearing assembly, the wood guard has a first side and a second side relative to each other, when in use, the four corners of the wood guard are placed on the four bearing assemblies, the first straightening seat and the second straightening seat are close to each other until they are respectively against the first side and the second side, and at the same time the first side enters the first through slot, the first straightening seat and the second straightening seat are driven to rotate synchronously by the driving assembly, so that the second side enters the second through slot, thereby realizing the straightening of the wood guard, the structure is simple, manpower is saved and the straightening effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic module packaging, in particular to a wood slat straightening device and a photovoltaic module packaging line. Background Art

[0002] Solar panels, also known as photovoltaic panels, need to be packaged after production for subsequent transportation. Since photovoltaic panels are flat, they are often stacked into a pile during packaging. The packaging process is complex, including strapping in various directions, flipping, boxing, laminating, etc., involving multiple workstations. Due to the large number of workstations, it is often designed in the form of an assembly line.

[0003] However, during the strapping process, it is necessary to manually add wooden guards to the outside of the photovoltaic module packaging box for protection. The strapping machine horizontally applies multiple strips to fix the packaging. The wooden guards are square-shaped, and a diagonal beam is set between one of the diagonals for support. The two opposite sides of the wooden guards have flanges so that they can be buckled at the side corners of the packaging box.

[0004] Since the wooden guardrail is supported by only one diagonal beam, the wooden guardrail is twisted, that is, the four sides of the entire wooden guardrail are not in the same plane. Before installing the wooden guardrail on the packaging box, it needs to be manually corrected, which wastes manpower and the correction effect is not ideal. Summary of the Invention

[0005] The purpose of the present invention is to provide a wood guardrail correction device and a photovoltaic module packaging line to solve the technical problems of manual correction of wood guardrails, which wastes manpower and has unsatisfactory correction effects.

[0006] The present invention provides a wood slat straightening device, comprising: a driving assembly, four bearing assemblies, a first straightening seat and a second straightening seat;

[0007] The first return seat and the second return seat are arranged opposite to each other, and the first return seat is provided with a first through slot, and the second return seat is provided with a second through slot, the first through slot is parallel to the second through slot, the first return seat is provided with the bearing components on both sides, and the second return seat is provided with the bearing components on both sides, the connecting line of the four bearing components is rectangular and is used to support the four corners of the wooden guardrail;

[0008] The driving assembly is used to drive the first return seat and the second return seat to rotate synchronously, and the first return seat and the second return seat can move closer to or farther away from each other;

[0009] The wooden guard has a first side and a second side opposite to each other. The first return seat and the second return seat can respectively abut against the first side and the second side by approaching each other, and can make the first side enter the first through groove. The first return seat and the second return seat can make the second side enter the second through groove by synchronous rotation.

[0010] As a further technical solution, it further comprises a pair of clamping jaws, wherein the pair of clamping jaws are respectively arranged on the left and right sides of the first return seat;

[0011] The clamping claw is used to clamp the first edge, and by clamping the first edge, the first edge can enter the first through groove.

[0012] As a further technical solution, the clamp includes a bidirectional cylinder and claw hands arranged on the two telescopic ends of the bidirectional cylinder.

[0013] As a further technical solution, the device further comprises a first transmission seat and a second transmission seat, wherein the driving assembly is connected to the first transmission seat and the second transmission seat and is used to drive the first transmission seat and the second transmission seat to rotate synchronously;

[0014] The first return seat and the clamping claw are both arranged on the first transmission seat, and the second return seat is arranged on the second transmission seat.

[0015] As a further technical solution, it also includes a first one-way telescopic cylinder, which is arranged on the second transmission seat, and the telescopic end of the first one-way telescopic cylinder is connected to the second return seat.

[0016] As a further technical solution, the drive assembly includes a pair of first pulleys, a pair of second pulleys, a pair of third pulleys, a first transmission belt, a second transmission belt, a third transmission belt, a transmission shaft and a drive motor;

[0017] A pair of the first pulleys are connected to each other through the first transmission belt, and one of the pair of the first pulleys is connected to the transmission shaft, and the other is connected to the first transmission seat;

[0018] A pair of the second pulleys are connected to each other through the second transmission belt, and one of the second pulleys is connected to the transmission shaft, and the other is connected to the second transmission seat;

[0019] The pair of third pulleys are connected in transmission via the third transmission belt, and one of the pair of third pulleys is connected to the transmission shaft, and the other is connected to the output shaft of the driving motor.

[0020] As a further technical solution, the bearing assembly includes a second one-way telescopic cylinder and a bearing seat;

[0021] The bearing seat is connected to the telescopic end of the second one-way telescopic cylinder and is used to bear the corner of the wooden guard.

[0022] As a further technical solution, the invention further comprises a carrier frame having a first beam and a second beam opposite to each other;

[0023] The driving assembly is arranged on the supporting frame, and the first return seat is located at the first beam, and the second return seat is located at the second beam;

[0024] Both ends of the first beam and both ends of the second beam are provided with mounting frames, and the bearing assembly is provided on and inside the mounting frames.

[0025] As a further technical solution, the first return seat and the second return seat are both made of flexible material.

[0026] The present invention provides a photovoltaic component packaging line, comprising the wood slat straightening device.

[0027] Compared with the existing technology, the technical advantages of the wood slat straightening device and photovoltaic module packaging line provided by the present invention are:

[0028] The wooden guard straightening device provided by the present invention includes: a driving component, four bearing components, a first straightening seat and a second straightening seat; the first straightening seat and the second straightening seat are arranged opposite to each other, and a first through-slot is provided on the first straightening seat, and a second through-slot is provided on the second straightening seat, the first through-slot is parallel to the second through-slot, bearing components are provided on the left and right sides of the first straightening seat, and bearing components are provided on the left and right sides of the second straightening seat, the connecting line of the four bearing components is rectangular and is used to support the four corners of the wooden guard; the driving component is used to drive the first straightening seat and the second straightening seat to rotate synchronously, and the first straightening seat and the second straightening seat can approach or move away from each other; the wooden guard has a first side and a second side relative to each other, and the first straightening seat and the second straightening seat can respectively abut against the first side and the second side by approaching each other, and can enable the first side to enter the first through-slot, and the first straightening seat and the second straightening seat can enable the second side to enter the second through-slot by rotating synchronously.

[0029] When the first and second sides are aligned, the first and second sides of the first and second sides of the second frame are aligned, and the first and second sides of the first frame are aligned, so that the first and second sides of the first frame are aligned.

[0030] The photovoltaic module packaging line provided by the present invention includes the above-mentioned wood guard straightening device. Therefore, the technical advantages and effects achieved by it include the technical advantages and effects achieved by the above-mentioned wood guard straightening device, which will not be elaborated here.

[0031] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 A partial schematic diagram of a photovoltaic module packaging line provided by an embodiment of the present invention;

[0034] Figure 2 A schematic structural diagram of a wood slat straightening device provided in an embodiment of the present invention;

[0035] Figure 3 A schematic diagram of a first side of a wooden slat provided in an embodiment of the present invention entering a first through groove;

[0036] Figure 4 A schematic diagram of the structure of the second correction seat provided in an embodiment of the present invention;

[0037] Figure 5 This is a schematic structural diagram of the first correction seat provided in an embodiment of the present invention.

[0038] Icons: 1-wood guard straightening device; 2-first straightening seat; 3-second straightening seat; 4-first through slot; 5-second through slot; 6-wood guard; 7-clamp; 8-bidirectional cylinder; 9-claw; 10-first transmission seat; 11-second transmission seat; 12-first one-way telescopic cylinder; 13-first pulley; 14-second pulley; 15-third pulley; 16-first transmission belt; 17-second transmission belt; 18-third transmission belt; 19-transmission shaft; 20-drive motor; 21-second one-way telescopic cylinder; 22-bearing seat; 23-bearing frame; 24-mounting frame; 25-flexible pad. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0042] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] The present invention will be further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0044] Specific structure such as Figures 1 to 5 shown.

[0045] The present embodiment provides a wood guard straightening device 1, comprising: a driving assembly, four bearing assemblies, a first straightening seat 2 and a second straightening seat 3; the first straightening seat 2 and the second straightening seat 3 are arranged opposite to each other, and a first through slot 4 is provided on the first straightening seat 2, and a second through slot 5 is provided on the second straightening seat 3, the first through slot 4 is parallel to the second through slot 5, bearing assemblies are provided on the left and right sides of the first straightening seat 2, and bearing assemblies are provided on the left and right sides of the second straightening seat 3, the connecting line of the four bearing assemblies is rectangular and is used to support the four corners of the wood guard 6; the driving assembly is used to drive the first straightening seat 2 and the second straightening seat 3 to rotate synchronously, and the first straightening seat 2 and the second straightening seat 3 can approach or move away from each other; the wood guard 6 has a first side and a second side relative to each other, and the first straightening seat 2 and the second straightening seat 3 can respectively abut against the first side and the second side by approaching each other, and can make the first side enter the first through slot 4, and the first straightening seat 2 and the second straightening seat 3 can make the second side enter the second through slot 5 by rotating synchronously.

[0046] When in use, the first return seat 2 and the second return seat 3 are away from each other, and the four corners of the wooden guard 6 are placed on the four bearing components. The first return seat 2 and the second return seat 3 are close to each other until they are respectively against the first side and the second side. At the same time, the first side enters the first through groove 4. Since the first side and the second side are not in the same plane, the second side does not enter the second through groove 5 at this time, that is, the second through groove 5 and the second side are in a cross shape. At this time, the first return seat 2 and the second return seat 3 are driven to rotate synchronously by the driving component. Since the first side is far away from the second side, the first return seat 2 rotates to The rotational force generated by the first side does not cause the second side to rotate. At the same time, the second correcting seat 3 rotates the second through groove 5 from a position intersecting with the second side to a position parallel to and opposite to the second side. At this time, under the action of the force of the first correcting seat 2 and the second correcting seat 3 approaching each other, the second side enters the second through groove 5. Since the first through groove 4 is parallel to the second through groove 5, the first side in the first through groove 4 is parallel to the second side in the second through groove 5, thereby realizing the correction of the wooden guard 6, so that the wooden guard 6 is in the same plane as a whole. The structure is simple, manpower is saved and the correction effect is good.

[0047] The optional technical solution of this embodiment further includes a pair of clamping jaws 7, which are respectively arranged on the left and right sides of the first return seat 2; the clamping jaws 7 are used to clamp the first edge, and by clamping the first edge, the first edge can enter the first through groove 4.

[0048] When the first return seat 2 and the second return seat 3 are close to each other and respectively abut against the first side and the second side, the first side can enter the clamping space of the clamping jaw 7, and the clamping jaw 7 clamps the first side. Since the pair of clamping jaws 7 are respectively arranged on the left and right sides of the first return seat 2, the pair of clamping jaws 7 clamp the first side at the same time to make the first side straight. When the first return seat 2 and the second return seat 3 are close to each other and respectively abut against the first side and the second side, even if the first side and the first through slot 4 are cross-shaped and do not enter the first through slot 4, after the pair of clamping jaws 7 clamp to make the first side straight, the first side is parallel to the first through slot 4. At this time, under the action of the force of the first return seat 2 and the second return seat 3 approaching each other, the first side enters the first through slot 4. Before the driving assembly drives the first return seat 2 and the second return seat 3 to rotate synchronously, the clamping jaw 7 releases the first side to prevent the clamping jaw 7 from driving the first side to rotate. It should be noted that the width of the first through groove 4 is slightly larger than the thickness of the first side, which facilitates the entry of the first side. The width of the second through groove 5 is slightly larger than the thickness of the second side, which facilitates the entry of the second side. When the clamping jaw 7 clamps the first side, the clamping space of the clamping jaw 7 is slightly larger than the thickness of the first side, so that the first side can enter the first through groove 4 under the action of the force of the first return seat 2 and the second return seat 3 approaching each other.

[0049] In an optional technical solution of this embodiment, the gripper 7 includes a bidirectional cylinder 8 and grippers 9 disposed at the two telescopic ends of the bidirectional cylinder 8. A clamping space is provided between the two grippers 9, and the bidirectional cylinder 8 moves the two opposing grippers 9 closer or further apart by telescoping, resulting in a simple structure and stable movement.

[0050] Preferably, the two opposing claws 9 are provided with flexible pads 25, which have a buffering effect when in contact with the first side to avoid damaging the first side. The flexible pads 25 can be rubber pads, silicone pads or plastic pads, as long as they meet the requirements.

[0051] The optional technical solution of this embodiment also includes a first transmission seat 10 and a second transmission seat 11. The driving assembly is connected to the first transmission seat 10 and the second transmission seat 11, and is used to drive the first transmission seat 10 and the second transmission seat 11 to rotate synchronously; the first return seat 2 and the clamping jaw 7 are both arranged on the first transmission seat 10, and the second return seat 3 is arranged on the second transmission seat 11.

[0052] In this embodiment, a pair of clamping jaws 7 are respectively arranged at the two ends of the first transmission seat 10, the first return seat 2 is arranged in the middle of the first transmission seat 10, and the clamping jaws 7 and the first return seat 2 are both located on the side of the first transmission seat 10 facing the second return seat 3. The driving assembly drives the first return seat 2 and the clamping jaws 7 to rotate synchronously through the first transmission seat 10, and the rotation is stable and the structure is simple.

[0053] The optional technical solution of this embodiment further includes a first one-way telescopic cylinder 12, which is arranged on the second transmission seat 11, and the telescopic end of the first one-way telescopic cylinder 12 is connected to the second return seat 3.

[0054] In this embodiment, the drive assembly, via the second transmission base 11, drives the second return base 3 and the first one-way telescopic cylinder 12 to rotate synchronously, resulting in stable rotation and a simple structure. Simultaneously, the second return base 3 can be moved toward or away from the first return base 2 via the first one-way telescopic cylinder 12. This means that while the first return base 2 remains stationary, the movement of the second return base 3 allows the first and second return bases 2, 3 to move closer or further from each other. This results in a simple structure, greater overall stability, and cost savings.

[0055] This embodiment is not limited to this. The first return seat 2 and the second return seat 3 can be close to or away from each other, and either one of them can move while the other does not move, or both can move. The first return seat 2 and the second return seat 3 can be driven by a motor, a cylinder or other drives that meet the requirements.

[0056] In the optional technical solution of this embodiment, the driving assembly includes a pair of first pulleys 13, a pair of second pulleys 14, a pair of third pulleys 15, a first transmission belt 16, a second transmission belt 17, a third transmission belt 18, a transmission shaft 19 and a driving motor 20; a pair of first pulleys 13 are connected by the first transmission belt 16, and one of the pair of first pulleys 13 is connected to the transmission shaft 19, and the other is connected to the first transmission seat 10; a pair of second pulleys 14 are connected by the second transmission belt 17, and one of the pair of second pulleys 14 is connected to the transmission shaft 19, and the other is connected to the second transmission seat 11; a pair of third pulleys 15 are connected by the third transmission belt 18, and one of the pair of third pulleys 15 is connected to the transmission shaft 19, and the other is connected to the output shaft of the driving motor 20.

[0057] In this embodiment, the driving motor 20 drives the transmission shaft 19 to rotate through a pair of third pulleys 15 and a third transmission belt 18. The rotation of the transmission shaft 19 drives the first transmission seat 10 to rotate through a pair of first pulleys 13 and a first transmission belt 16, and drives the second transmission seat 11 to rotate through a pair of second pulleys 14 and a second transmission belt 17. The overall structure is simple and the driving effect is stable.

[0058] In an optional technical solution of this embodiment, the bearing assembly includes a second one-way telescopic cylinder 21 and a bearing seat 22; the bearing seat 22 is connected to the telescopic end of the second one-way telescopic cylinder 21 and is used to bear the corners of the wooden guard 6.

[0059] In this embodiment, the supporting seat 22 used to cooperate with the two corners at the first side of the wooden guard 6 can be extended or retracted toward the second side under the drive of the second one-way telescopic cylinder 21. The supporting seat 22 used to cooperate with the two corners at the second side of the wooden guard 6 can be extended or retracted toward the first side under the drive of the second one-way telescopic cylinder 21. When the wooden guard 6 needs to be corrected, the four supporting seats 22 are extended so that the four corners of the wooden guard 6 can be placed on the four supporting seats 22. When the wooden guard 6 needs to be removed after the correction is completed, when the robot grabs the wooden guard 6, the four supporting seats 22 retract. At this time, the supporting seat 22 is separated from the wooden guard 6, avoiding the flanges on the two sides outside the first and second sides of the wooden guard 6 from being stuck on the supporting seat 22 when the robot moves the wooden guard 6, affecting the transportation of the wooden guard 6 and avoiding damage to the wooden guard 6.

[0060] The optional technical solution of this embodiment also includes a supporting frame 23, which has a first beam and a second beam relative to each other; the driving component is arranged on the supporting frame 23, and the first return seat 2 is located at the first beam, and the second return seat 3 is located at the second beam; both ends of the first beam and the second beam are provided with mounting frames 24, and the supporting component is arranged on the mounting frame 24 and is located inside the mounting frame 24.

[0061] In this embodiment, the first pulley 13 connected to the first transmission seat 10 is installed on the first beam through the seat body, and the second pulley 14 connected to the second transmission seat 11 is installed on the first beam through the seat body. The seat body and the mounting frame 24 are both located below the first beam and the second beam. The drive motor 20 is installed at the bottom of the support frame 23, and the transmission shaft 19 is installed at the bottom of the support frame 23 through the shaft seat. The overall structure is simple and occupies little space. The support frame 23 can protect the wooden guard 6 to avoid damage caused by external contact.

[0062] In an optional technical solution of this embodiment, the first return seat 2 and the second return seat 3 are both made of flexible materials to avoid damage to the first side and the second side. The flexible material can be rubber, silicone or plastic, as long as it meets the requirements.

[0063] The photovoltaic module packaging line provided in this embodiment includes the above-mentioned wood guard straightening device 1. Therefore, the technical advantages and effects achieved by the photovoltaic module packaging line include the technical advantages and effects achieved by the above-mentioned wood guard straightening device 1, which will not be repeated here.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wood guard straightening device, characterized in that: include: A driving assembly, four bearing assemblies, a first return seat (2) and a second return seat (3); The first return seat (2) and the second return seat (3) are arranged opposite to each other, and the first return seat (2) is provided with a first through slot (4), and the second return seat (3) is provided with a second through slot (5), the first through slot (4) and the second through slot (5) are parallel and opposite to each other, the first return seat (2) is provided with the bearing components on both sides, and the second return seat (3) is provided with the bearing components on both sides, and the connecting line of the four bearing components is rectangular and is used to bear the four corners of the wooden guard (6); The driving assembly is used to drive the first return seat (2) and the second return seat (3) to rotate synchronously, and the first return seat (2) and the second return seat (3) can move closer to or farther away from each other; The wooden guard (6) has a first side and a second side opposite to each other, the first return seat (2) and the second return seat (3) can respectively abut against the first side and the second side by approaching each other, and can make the first side enter the first through groove (4), and the first return seat (2) and the second return seat (3) can make the second side enter the second through groove (5) by synchronously rotating. It also includes a pair of clamping jaws (7), which are respectively arranged on the left and right sides of the first return seat (2); The clamping claw (7) is used to clamp the first edge, and by clamping the first edge, the first edge can enter the first through groove (4); It also includes a first transmission seat (10) and a second transmission seat (11), wherein the driving assembly is connected to the first transmission seat (10) and the second transmission seat (11), and is used to drive the first transmission seat (10) and the second transmission seat (11) to rotate synchronously; The first return seat (2) and the clamping claw (7) are both arranged on the first transmission seat (10), and the second return seat (3) is arranged on the second transmission seat (11).

2. The wood slat straightening device according to claim 1, characterized in that: The clamping claw (7) comprises a bidirectional cylinder (8) and claw hands (9) arranged on two telescopic ends of the bidirectional cylinder (8).

3. The wood slat straightening device according to claim 1, characterized in that: It also includes a first one-way telescopic cylinder (12), which is arranged on the second transmission seat (11), and the telescopic end of the first one-way telescopic cylinder (12) is connected to the second return seat (3).

4. The wood slat straightening device according to claim 1, characterized in that: The drive assembly comprises a pair of first pulleys (13), a pair of second pulleys (14), a pair of third pulleys (15), a first transmission belt (16), a second transmission belt (17), a third transmission belt (18), a transmission shaft (19) and a drive motor (20); A pair of the first pulleys (13) are connected in transmission via the first transmission belt (16), and one of the pair of the first pulleys (13) is connected to the transmission shaft (19), and the other is connected to the first transmission seat (10); A pair of the second pulleys (14) are connected in transmission via the second transmission belt (17), and one of the pair of the second pulleys (14) is connected to the transmission shaft (19), and the other is connected to the second transmission seat (11); The pair of third pulleys (15) are connected in transmission via the third transmission belt (18), and one of the pair of third pulleys (15) is connected to the transmission shaft (19), and the other is connected to the output shaft of the drive motor (20).

5. The wood slat straightening device according to any one of claims 1 to 4, characterized in that: The bearing assembly comprises a second one-way telescopic cylinder (21) and a bearing seat (22); The bearing seat (22) is connected to the telescopic end of the second one-way telescopic cylinder (21) and is used to bear the corner of the wooden guard (6).

6. The wood slat straightening device according to any one of claims 1 to 4, characterized in that: Also included is a carrier frame (23), wherein the carrier frame (23) has a first beam and a second beam facing each other; The driving assembly is arranged on the carrier (23), and the first return seat (2) is located at the first beam, and the second return seat (3) is located at the second beam; Both ends of the first beam and both ends of the second beam are provided with mounting frames (24), and the bearing assembly is provided on the mounting frames (24) and is located inside the mounting frames (24).

7. The wood slat straightening device according to any one of claims 1 to 4, characterized in that: The first return seat (2) and the second return seat (3) are both made of flexible material.

8. A photovoltaic module packaging line, characterized in that: The invention comprises the wood slat straightening device according to any one of claims 1 to 7.

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