Multi-frame synchronous feeding device

Abstract

The invention discloses a multi-frame synchronous feeding device which is used for feeding of at least two photovoltaic frames and comprises at least two feeding units corresponding to the photovoltaic frames, each feeding unit further comprises two obliquely-arranged guide strips, a material storage area is formed between the two parallel and spaced guide strips, and the guide strips are arranged in the material storage area. The front sides of the two guide strips are each provided with a material receiving base, the front ends of the two guide strips are each provided with a front blocking air cylinder and a rear blocking air cylinder in sequence and located on the two sides of the material storage area, and the front side of each front blocking air cylinder is provided with a material receiving air cylinder. Power is provided through the dead weight of workpieces, photovoltaic frames are sorted one by one through cooperation of the two blocking air cylinders so that follow-up material taking operation can be facilitated, synchronous feeding can be conducted on multiple sets of workpieces, centering calibration can be conducted on the workpieces sorted to the material receiving base, and the position precision of each workpiece in the circulation process is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaics, and particularly to a multi-frame synchronous feeding device for gluing in a photovoltaic processing production line. Background Art

[0002] When installing the laminate and frame of a photovoltaic module, it is necessary to apply glue to the frame before installing it with the laminate. When applying glue, the frame needs to go through steps such as feeding, picking, and gluing.

[0003] In the prior art, usually a belt is first used to transport the photovoltaic frame to the position of the manipulator for feeding, and then the manipulator picks them one by one and transports them to the gluing platform for gluing. However, when the belt is transporting, it cannot perform sorting one by one and synchronous feeding of multiple groups of frames. Moreover, during transportation, the position of the frame is offset, and the position of the workpiece cannot be calibrated, which easily affects the position accuracy of the frame transportation. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a multi-frame synchronous feeding device. This multi-frame synchronous feeding device realizes the sorting of photovoltaic frames one by one for subsequent picking operations through the power provided by the self-weight of the workpiece and the cooperation of two blocking cylinders, and can perform synchronous feeding of multiple groups of workpieces. It can also perform centering calibration on the workpieces sorted onto the receiving seat, improving the position accuracy of each workpiece during the transfer process.

[0005] To solve the above technical problem, the technical solution adopted by the present invention is: a multi-frame synchronous feeding device for feeding at least two photovoltaic frames, including: at least two feeding units corresponding to the photovoltaic frames, the feeding units are inclined such that their front ends are lower than their rear ends, at least two of the feeding units are arranged at intervals in the vertical direction, and in any two adjacent feeding units, the front end of the feeding unit arranged above is located in front of the front end of the feeding unit arranged below. Each feeding unit further includes: two inclined guide bars, a storage area is formed between the two parallel and spaced guide bars, and several photovoltaic frames can be arranged in sequence and inclinedly in the storage area along the length direction of the guide bars. The lower surfaces of both ends of each photovoltaic frame are slidably contacted with the upper surfaces of the two guide bars correspondingly; A receiving seat is provided on the front side of each of the two guide bars. The bearing part, stop part, and limiting part of the receiving seat are perpendicular to each other in pairs to enclose a receiving area for the end of the photovoltaic frame to be inserted. Among them, the upper surface of the bearing part for contacting the lower surface of the photovoltaic frame is flush with the upper surface of the guide bar, the stop part is used for contacting the front surface of the photovoltaic frame, and the limiting part is arranged towards the end faces of both ends of the photovoltaic frame; At the front ends of each of the two guide bars and on both sides of the storage area, a front blocking cylinder and a rear blocking cylinder are sequentially installed. The piston rods of the two front blocking cylinders are each arranged towards the storage area and are each installed with a blocking plate. The piston rods of the two rear blocking cylinders are each arranged towards the storage area and are each installed with a blocking strip. A receiving cylinder is arranged on the front side of the front blocking cylinder, and the piston rod of the receiving cylinder is connected to the surface of the limiting part of the receiving seat on the side opposite to the photovoltaic frame; When the piston rod of the front blocking cylinder is in the extended state, the rear side surface of the blocking plate is in pressing contact with the front side surface of the photovoltaic frame arranged at the forefront. When the piston rod of the rear blocking cylinder is in the extended state, the blocking strip is inserted into the photovoltaic frame arranged at the second forefront from the end. When the piston rod of the receiving cylinder is in the extended state, the limiting part of the receiving seat is in pressing contact with the end faces at both ends of the photovoltaic frame.

[0006] The further improved solutions in the above technical solutions are as follows: 1. In the above solution, the receiving seat is installed on the guide bar through a connecting piece.

[0007] 2. In the above solution, the receiving cylinder is installed on the guide bar through a mounting seat.

[0008] 3. In the above solution, an elastic gasket is installed on the surface of the stopping part of the receiving seat facing the photovoltaic frame side.

[0009] 4. In the above solution, the elastic gasket is a urethane rubber gasket.

[0010] 5. In the above solution, 4 feeding units are provided for feeding 4 photovoltaic frames.

[0011] 6. In the above solution, the 4 feeding units have the same inclination direction and different inclination angles.

[0012] 7. In the above solution, the telescopic actions of the front blocking cylinders of each feeding unit are consistent, and the telescopic actions of the rear blocking cylinders of each feeding unit are consistent.

[0013] 8. In the above solution, the two L-shaped guide bars are arranged oppositely. The upper surface of the first folded edge part of each guide bar is used to contact the lower surface of the photovoltaic frame, and the surface of the second folded edge part of the guide bar facing the storage area side is used to contact the end face of the photovoltaic frame.

[0014] Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art: The multi-frame synchronous feeding device of the present invention has a feeding unit inclined such that its front end is lower than its rear end. At least two feeding units are arranged at intervals in the vertical direction. Among any two adjacent feeding units, the front end of the upper feeding unit is located on the front side of the front end of the lower feeding unit. On the front side of each of the two guiding bars of the feeding unit, there is a receiving seat. The upper surface of the bearing part for contacting the lower surface of the photovoltaic frame is flush with the upper surface of the guiding bar. The stopping part is used to contact the front side surface of the photovoltaic frame. The limiting part is arranged facing the end faces at both ends of the photovoltaic frame. At the front ends of each of the two guiding bars and on both sides of the storage area, a front blocking cylinder and a rear blocking cylinder are successively installed. The piston rods of the two front blocking cylinders are both arranged facing the storage area and are equipped with a blocking plate. The piston rods of the two rear blocking cylinders are both arranged facing the storage area and are equipped with a blocking strip. A receiving cylinder is arranged on the front side of the front blocking cylinder. The piston rod of this receiving cylinder is connected to the surface of the limiting part of the receiving seat on the side opposite to the photovoltaic frame. When the piston rod of the front blocking cylinder is in the extended state, the rear side surface of the blocking plate is in pressing contact with the front side surface of the photovoltaic frame arranged at the forefront. When the piston rod of the rear blocking cylinder is in the extended state, the blocking strip is inserted into the photovoltaic frame arranged at the second forefront from the end. When the piston rod of the receiving cylinder is in the extended state, the limiting part of the receiving seat is in pressing contact with the end faces at both ends of the photovoltaic frame. By using the self-weight of the workpiece to provide power, the orderly arrangement and automatic sliding replenishment of multiple workpieces in each group are realized. Also, through the cooperation of the two blocking cylinders in each feeding unit, the automatic separation of multiple workpieces in each group is achieved, and the workpiece at the forefront automatically slides onto the receiving seat, thereby realizing the individual sorting of the photovoltaic frames for subsequent material taking operations. Moreover, synchronous feeding of multiple groups of workpieces can be carried out, improving the processing efficiency and consistency. Additionally, the workpieces sorted onto the receiving seat can be centered and calibrated, improving the position accuracy of each workpiece during the transfer process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG Figure 1 is a schematic diagram of the overall structure of the multi-frame synchronous feeding device of the present invention; FIG Figure 2 is a structural diagram of the feeding unit of the multi-frame synchronous feeding device of the present invention; FIG Figure 3 is Figure 2 an enlarged schematic diagram of part A in FIG FIG Figure 4 is a schematic diagram of the initial state of the multi-frame synchronous feeding device of the present invention; FIG Figure 5 is Figure 4 an enlarged schematic diagram of part B in FIG

[0016] In the above drawings: 100, photovoltaic frame; 1, material receiving cylinder; 2, guide bar; 201, first flanging portion; 202, second flanging portion; 3, storage area; 4, front blocking cylinder; 5, rear blocking cylinder; 6, blocking plate; 7, blocking bar; 8, material receiving seat; 81, bearing portion; 82, stop portion; 83, limiting portion; 84, elastic gasket; 9, gasket; 10, connecting seat. Embodiment

[0017] The present patent can be further clearly understood through the following specific embodiments, but they do not limit the present patent.

[0018] Embodiment 1: A multi-frame synchronous feeding device for feeding at least 2 photovoltaic frames 100, comprising: at least 2 feeding units corresponding to the photovoltaic frames 100, the feeding units being inclined such that their front ends are lower than their rear ends, at least 2 of the feeding units being spaced apart in the vertical direction, and in any two adjacent feeding units, the front end of the feeding unit disposed above is located on the front side of the front end of the feeding unit disposed below. Each feeding unit further comprises: 2 inclined guide bars 2, a storage area 3 is formed between the 2 parallel and spaced-apart guide bars 2, and a plurality of photovoltaic frames 100 can be sequentially and inclinedly arranged in the storage area 3 along the length direction of the guide bars 2. The lower surfaces of both ends of each photovoltaic frame 100 are slidably contacted with the upper surfaces of the 2 guide bars 2 correspondingly; A material receiving seat 8 is disposed on the front side of each of the 2 guide bars 2. The bearing portion 81, the stop portion 82 and the limiting portion 83 of the material receiving seat 8 are perpendicular to each other in pairs to enclose a material receiving area into which the end of the photovoltaic frame 100 can be inserted. Among them, the upper surface of the bearing portion 81 for contacting the lower surface of the photovoltaic frame 100 is flush with the upper surface of the guide bar 2, the stop portion 82 is used for contacting the front side surface of the photovoltaic frame 100, and the limiting portion 83 is disposed toward the end faces of both ends of the photovoltaic frame 100; A front blocking cylinder 4 and a rear blocking cylinder 5 are sequentially installed on both sides of the front ends of the 2 guide bars 2 and located in the storage area 3. The piston rods of the 2 front blocking cylinders 4 are each disposed toward the storage area 3 and are installed with a blocking plate 6. The piston rods of the 2 rear blocking cylinders 5 are each disposed toward the storage area 3 and are installed with a blocking bar 7. A material receiving cylinder 1 is disposed on the front side of the front blocking cylinder 4, and the piston rod of the material receiving cylinder 1 is connected to the surface of the limiting portion 83 of the material receiving seat 8 on the side opposite to the photovoltaic frame 100; When the piston rod of the front blocking cylinder 4 is in the extended state, the rear side surface of the blocking plate 6 is in pressing contact with the front side surface of the photovoltaic frame 100 arranged at the forefront. When the piston rod of the rear blocking cylinder 5 is in the extended state, the blocking strip 7 is inserted into the photovoltaic frame 100 arranged at the second forefront from the end. When the piston rod of the material receiving cylinder 1 is in the extended state, the limiting part 83 of the material receiving seat 8 is in pressing contact with the end faces at both ends of the photovoltaic frame 100; When it is necessary to output and load the photovoltaic frame at the bottom and the forefront outward, first drive the piston rod of the rear blocking cylinder to extend, so that the blocking strips installed thereon are respectively inserted into the second last photovoltaic frame from the front end at both ends, realizing the blocking of the second photovoltaic frame and the photovoltaic frames behind it. Then drive the piston rod of the front blocking cylinder to contract, so that the blocking plate cancels the blocking of the photovoltaic frame at the bottom and the forefront. Then it slides forward and downward under its own gravity onto the material receiving seat and is located between the two material receiving seats.

[0019] The above-mentioned material receiving seat 8 is installed on the guide bar 2 through a connecting piece.

[0020] An elastic gasket 84 is installed on the surface of the stop portion 82 of the above-mentioned material receiving seat 8 facing the photovoltaic frame 100, which can perform shock absorption and buffering on the workpiece that slides into the material receiving seat under its own weight, avoiding damage to the workpiece due to excessive force.

[0021] The above-mentioned elastic gasket 84 is a urethane rubber gasket.

[0022] The above-mentioned feeding unit is provided with 4, which are used for feeding 4 photovoltaic frames 100.

[0023] The inclination directions of the 4 above-mentioned feeding units are the same, but the inclination angles are different.

[0024] The telescopic actions of the front blocking cylinders 4 of each of the above-mentioned feeding units are consistent, and the telescopic actions of the rear blocking cylinders 5 of each of the above-mentioned feeding units are consistent.

[0025] The two above-mentioned guide bars 2 in an L shape are arranged oppositely. The upper surface of the first folded edge portion 201 of each guide bar 2 is used for contacting the lower surface of the photovoltaic frame 100, and the surface of the second folded edge portion 202 of the guide bar 2 facing the storage area 3 is used for contacting the end face of the photovoltaic frame 100; Put the photovoltaic frames into the upper end of the storage area in sequence, so that several photovoltaic frames are arranged in order in the storage area. Also, due to the inclined setting of the guide bar, several strip-shaped workpieces in the storage area can slide downward obliquely along the upper surface of the first folded edge portion of the guide bar under their own gravity.

[0026] Embodiment 2: A multi-frame synchronous feeding device for feeding at least two photovoltaic frames 100, comprising: at least two feeding units corresponding to the photovoltaic frames 100, the feeding units being inclined such that their front ends are lower than their rear ends, at least two of the feeding units being spaced apart in the vertical direction, and in any two adjacent feeding units, the front end of the upper feeding unit is located on the front side of the front end of the lower feeding unit. Each feeding unit further comprises: two inclined guide bars 2, a storage area 3 is formed between the two parallel and spaced guide bars 2, and a plurality of photovoltaic frames 100 can be sequentially arranged obliquely along the length direction of the guide bars 2 in the storage area 3. The lower surfaces of both ends of each photovoltaic frame 100 are slidably contacted with the upper surfaces of the two guide bars 2 correspondingly; A receiving seat 8 is provided on the front side of each of the two guide bars 2. The bearing part 81, the stop part 82 and the limiting part 83 of the receiving seat 8 are perpendicular to each other in pairs to form a receiving area for the end of the photovoltaic frame 100 to be inserted. Among them, the upper surface of the bearing part 81 for contacting the lower surface of the photovoltaic frame 100 is flush with the upper surface of the guide bar 2, the stop part 82 is used for contacting the front side surface of the photovoltaic frame 100, and the limiting part 83 is arranged towards the end faces of both ends of the photovoltaic frame 100; A front blocking cylinder 4 and a rear blocking cylinder 5 are sequentially installed on both sides of the front end of each of the two guide bars 2 and located in the storage area 3. The piston rods of the two front blocking cylinders 4 are arranged towards the storage area 3 and a blocking plate 6 is installed, and the piston rods of the two rear blocking cylinders 5 are arranged towards the storage area 3 and a blocking bar 7 is installed. A receiving cylinder 1 is provided on the front side of the front blocking cylinder 4, and the piston rod of the receiving cylinder 1 is connected to the surface of the limiting part 83 of the receiving seat 8 on the side opposite to the photovoltaic frame 100; For each feeding unit, in the initial state, the piston rod of the front blocking cylinder always remains in the extended state; For a plurality of strip-shaped workpieces arranged in the storage area, the photovoltaic frame at the lowest and the most front end stops sliding under the stop of the upper blocking bar of the front blocking cylinder; The piston rods of two oppositely arranged receiving cylinders are simultaneously changed from the retracted state to the extended state to clamp and center the workpiece located therebetween to ensure the position accuracy of the workpiece. Then, the workpiece on the receiving seat can be taken away by an external receiving platform (such as a manipulator); When the piston rod of the front stop cylinder 4 is in the extended state, the rear side surface of the stop plate 6 is in pressing contact with the front side surface of the photovoltaic frame 100 arranged at the forefront. When the piston rod of the rear stop cylinder 5 is in the extended state, the stop bar 7 is inserted into the photovoltaic frame 100 arranged at the second forefront from the end. When the piston rod of the receiving cylinder 1 is in the extended state, the limiting part 83 of the receiving seat 8 is in pressing contact with the end faces at both ends of the photovoltaic frame 100.

[0027] The above-mentioned receiving cylinder 1 is installed on the guide bar 2 through a mounting seat.

[0028] The telescopic movements of the front stop cylinders 4 of each of the above-mentioned loading units are consistent, and the telescopic movements of the rear stop cylinders 5 of each of the above-mentioned loading units are consistent.

[0029] The two L-shaped guide bars 2 are arranged oppositely. The upper surface of the first folded edge portion 201 of each guide bar 2 is used to contact the lower surface of the photovoltaic frame 100, and the surface of the second folded edge portion 202 of the guide bar 2 facing the storage area 3 is used to contact the end face of the photovoltaic frame 100.

[0030] The above-mentioned stop bar 15 is installed on the second folded edge portion 202 of the guide bar 2.

[0031] A gasket 9 extending along its length direction is installed on the upper surface of the first folded edge portion 201 of the above-mentioned guide bar 2, and the gasket 9 is a Teflon gasket.

[0032] Avoidance through holes 17 for the stop plate 6 and the stop bar 7 to pass through are formed on the second folded edge portion 202 of the above-mentioned guide bar 2.

[0033] One end of the above-mentioned mounting plate 16 is connected to the lower surface of the first folded edge portion 201 of the guide bar 2, and the other end of the mounting plate 16 extends to the side of the second folded edge portion 202 of the guide bar 2 opposite to the storage area 3 and the front stop cylinder 4 and the rear stop cylinder 5 are installed thereon; each of the front stop cylinder 4 and the rear stop cylinder 5 is installed on the upper surface of the mounting plate 16 through a connecting seat 10, and the stop plate 6 and the stop bar 7 are in sliding fit with the corresponding connecting seat 10.

[0034] The working principle of the present invention is as follows: For each loading unit, in the initial state, the piston rod of the front stop cylinder always remains in the extended state; The photovoltaic frames are sequentially placed from the upper end of the storage area, so that a plurality of photovoltaic frames are sequentially and orderly arranged in the storage area. Also, due to the inclined arrangement of the guide bars, the plurality of strip-shaped workpieces in the storage area can slide downward along the upper surface of the first folded edge portion of the guide bar under the action of their respective gravity; For several strip-shaped workpieces arranged in the stock area, the photovoltaic frame at the bottommost and foremost end stops sliding down under the stop of the stop bar on the front stop cylinder; When it is necessary to output and feed the photovoltaic frame at the bottommost and foremost end outward, first drive the piston rod of the rear stop cylinder to extend, so that the stop bars installed thereon are respectively inserted into the second-to-last photovoltaic frame from the front end at both ends, realizing the stop of the second photovoltaic frame and the photovoltaic frames behind it. Then drive the piston rod of the front stop cylinder to contract, so that the stop plate withdraws the stop on the photovoltaic frame at the bottommost and foremost end. Then it slides forward and downward under its own gravity to the receiving seat and is located between the two receiving seats. At this time, the piston rods of the two oppositely arranged receiving cylinders are simultaneously changed from the contracted state to the extended state to clamp and center the workpiece located therebetween to ensure the position accuracy of the workpiece. After that, the workpiece on the receiving seat can be taken away by an external receiving platform (such as a manipulator); Repeat the above process to achieve the automatic feeding of strip-shaped workpieces one by one.

[0035] For the multi-frame synchronous feeding device, each feeding unit synchronously executes the above operations, so that the photovoltaic frames at the bottommost and foremost end on each feeding platform simultaneously slide forward and downward under their own gravity to the receiving seat, thereby realizing the synchronous feeding of multiple photovoltaic frames.

[0036] Using the above multi-frame synchronous feeding device, it provides power through the self-weight of the workpiece and simultaneously realizes the orderly arrangement and automatic sliding and replenishment of each group of multiple workpieces. It also realizes the automatic separation of each group of multiple workpieces through the cooperation of the two stop cylinders in each feeding unit and makes the workpiece at the foremost end automatically slide to the receiving seat, thereby realizing the individual sorting of photovoltaic frames for subsequent picking operations, and can synchronously feed multiple groups of workpieces, improving the processing efficiency and consistency. It can also center and calibrate the workpieces sorted to the receiving seat, improving the position accuracy of each workpiece during the transfer process.

[0037] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention, and their purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A multi-frame synchronous feeding device for feeding at least two photovoltaic frames (100). It includes: At least two feeding units corresponding to the photovoltaic frames (100), characterized in that: the feeding units are inclined so that their front ends are lower than their rear ends, at least two of the feeding units are arranged at intervals in the vertical direction, and among any two adjacent feeding units, the front end of the feeding unit arranged above is located on the front side of the front end of the feeding unit arranged below. Each feeding unit further includes: two inclined guide bars (2), and a storage area (3) is formed between the two parallel and spaced guide bars (2). A number of photovoltaic frames (100) can be arranged in sequence along the length direction of the guide bars (2) in the storage area (3) in an inclined manner. The lower surfaces of both ends of each photovoltaic frame (100) are slidably contacted with the upper surfaces of the two guide bars (2) correspondingly; On the front side of each of the two guide bars (2), a receiving seat (8) is provided. The bearing part (81), the stop part (82) and the limiting part (83) of the receiving seat (8) are perpendicular to each other in pairs to enclose a receiving area into which the end of the photovoltaic frame (100) can be inserted. Among them, the upper surface of the bearing part (81) for contacting the lower surface of the photovoltaic frame (100) is flush with the upper surface of the guide bar (2), the stop part (82) is used for contacting the front side surface of the photovoltaic frame (100), and the limiting part (83) is arranged towards the end faces of both ends of the photovoltaic frame (100); At the front ends of each of the two guide bars (2) and on both sides of the storage area (3), a front blocking cylinder (4) and a rear blocking cylinder (5) are sequentially installed. The piston rods of the two front blocking cylinders (4) are arranged towards the storage area (3) and a blocking plate (6) is installed. The piston rods of the two rear blocking cylinders (5) are arranged towards the storage area (3) and a blocking strip (7) is installed. A receiving cylinder (1) is arranged on the front side of the front blocking cylinder (4), and the piston rod of the receiving cylinder (1) is connected to the surface of the limiting part (83) of the receiving seat (8) on the side opposite to the photovoltaic frame (100); When the piston rod of the front blocking cylinder (4) is in the extended state, the rear side surface of the blocking plate (6) is in pressing contact with the front side surface of the photovoltaic frame (100) arranged at the forefront. When the piston rod of the rear blocking cylinder (5) is in the extended state, the blocking strip (7) is inserted into the photovoltaic frame (100) arranged at the second forefront from the end. When the piston rod of the receiving cylinder (1) is in the extended state, the limiting part (83) of the receiving seat (8) is in pressing contact with the end faces of both ends of the photovoltaic frame (100).

2. The multi-frame synchronous feeding device according to claim 1, characterized in that: The receiving seat (8) is installed on the guide bar (2) through a connecting piece.

3. The multi-frame synchronous feeding device according to claim 1, characterized in that: The receiving cylinder (1) is installed on the guide bar (2) through a mounting seat.

4. The multi-frame synchronous feeding device according to claim 1, characterized in that: An elastic gasket (84) is installed on the surface of the stop portion (82) of the material receiving seat (8) facing the side of the photovoltaic frame (100), (which can cushion and buffer the workpiece that slides into the material receiving seat under its own weight, and avoid damage to the workpiece due to excessive force).

5. The multi-frame synchronous feeding device according to claim 4, characterized in that: The elastic gasket (84) is a urethane rubber gasket.

6. The multi-frame synchronous feeding device according to claim 1, characterized in that: There are 4 feeding units provided, which are used for feeding 4 photovoltaic frames (100).

7. The multi-frame synchronous feeding device according to claim 6, characterized in that: The 4 feeding units have the same inclination direction but different inclination angles.

8. The multi-frame synchronous feeding device according to claim 1, characterized in that: The telescopic actions of the front blocking cylinders (4) of each feeding unit are consistent, and the telescopic actions of the rear blocking cylinders (5) of each feeding unit are consistent.

9. The multi-frame synchronous feeding device according to claim 1, characterized in that: The two L-shaped guide bars (2) are arranged oppositely, and the upper surface of the first folded edge portion (201) of each guide bar (2) is used to contact the lower surface of the photovoltaic frame (100), and the surface of the second folded edge portion (202) of the guide bar (2) facing the storage area (3) is used to contact the end face of the photovoltaic frame (100).

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