A continuous cutting device for wood-plastic composite boards

Abstract

This invention discloses a continuous cutting device for wood-plastic composite boards (WPC), comprising: a conveyor belt for transporting sanded WPC to one side of a cutting mechanism; a conveying unit disposed on the conveyor belt on the cutting mechanism side; a moving unit disposed at the cutting mechanism; multiple pressing units disposed on the upper end of the moving units on both sides of the cutting mechanism; and a transfer unit disposed on the symmetrical side of the moving units on the conveyor belt. By using the conveyor belt, conveying unit, moving unit, pressing unit, and transfer unit in conjunction with the cutting mechanism, the device can continuously transport and cut WPC. Simultaneously, it can stably limit and clamp the WPC during transfer and cutting, thereby preventing positional displacement during transfer and cutting, and ensuring that the cut ends of the WPC are flush.

Description

Technical Field

[0001] This invention relates to the field of wood-plastic composite board cutting equipment technology, specifically to a continuous cutting device for wood-plastic composite boards. Background Technology

[0002] After sanding, the wood-plastic composite boards are transported to the cutting mechanism via a conveyor belt for multi-segment cutting. As multiple wood-plastic composite boards are transferred from the conveyor belt to the cutting mechanism, their positions shift, causing them to tilt and resulting in tilted cutting positions. Furthermore, the multi-segment and moving cutting process makes it easy for the wood-plastic composite boards to shift during cutting, leading to uneven ends on the finished product. Summary of the Invention

[0003] The purpose of this invention is to provide a continuous cutting device for wood-plastic composite boards, so as to solve the problem mentioned in the background art that the position of the wood-plastic composite board is offset during transportation and cutting, resulting in uneven ends of the wood-plastic composite board after cutting.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a continuous cutting device for wood-plastic composite boards, comprising:

[0005] The conveyor belt is used to transport the sanded wood-plastic composite board to the cutting mechanism.

[0006] A conveying unit is disposed on the conveyor belt on the side of the cutting mechanism;

[0007] A moving unit, which is located at the cutting mechanism, is used to move the wood-plastic board transferred from the conveying unit to the cutting mechanism for cutting.

[0008] The pressing unit is provided in multiple sets and is located at the upper end of the moving unit on both sides of the cutting mechanism. It is used to press the wood-plastic board downward when the moving unit moves the wood-plastic board to be cut by the cutting mechanism to prevent the wood-plastic board from shifting during the cutting process.

[0009] The transfer unit is located on the symmetrical side of the conveyor belt of the moving unit and is used to transport the cut wood-plastic composite board to the next process.

[0010] Preferably, the conveying unit includes:

[0011] Multiple conveyor belts are evenly spaced at the lower end of the conveyor belt.

[0012] A belt support, which is disposed between multiple transmission belts and is used to connect the belt supports into a whole;

[0013] A power component is located at the lower end of the belt support and fixed to the conveyor belt, used to realize the up and down movement of the belt support;

[0014] The clamping guide is located on both sides of the wood-plastic composite board when it is transported to the end of the conveyor belt. At the same time, after the power unit drives the belt support to rise, the conveyor belt transports the wood-plastic composite board to the moving unit, and the clamping guide is used to limit and clamp both ends of the wood-plastic composite board.

[0015] Preferably, the moving unit includes:

[0016] Multiple sets of chain conveyor belts are located between the transmission belt and the transfer unit, and at the lower end of the cutting mechanism;

[0017] Multiple transport blocks with friction textures are spaced apart on a chain conveyor belt to work in conjunction with the pressing unit to prevent the wood-plastic board from shifting its position during cutting.

[0018] A connector is placed between the chain conveyor belt and the transport block to fix the transport block to the chain conveyor belt.

[0019] Preferably, the pressing unit includes:

[0020] Mounting plates are positioned directly above the chain conveyor belt. Each set of pressing units has two mounting plates, and each mounting plate corresponds one-to-one with the chain conveyor belt.

[0021] Two sets of elastic pressing components are symmetrically arranged on both sides of a mounting plate to cooperate with the transport blocks on the chain conveyor belt to press and fix the two sides of the wood-plastic board during the cutting of the wood-plastic board.

[0022] Preferably, the transfer unit includes:

[0023] A transfer conveyor belt, wherein the transfer conveyor belt is located on the other side of the chain conveyor belt;

[0024] A transfer conveyor belt is provided on one side of a transfer transport belt and is used to transport the cut wood-plastic composite boards transported by the transfer transport belt to the next process.

[0025] Preferably, the clamping guide includes:

[0026] Multiple first guide rollers are installed at one end of the conveyor belt to limit one end of the wood-plastic composite board;

[0027] An elastic clamp is rotatably mounted on the conveyor belt to limit the other end of the wood-plastic composite board when it is transported to the moving unit via the conveyor belt.

[0028] A synchronous moving component is provided on the elastic clamping plate and the belt support bracket. When the power component drives the belt support bracket to rise, the synchronous moving component synchronously drives the elastic clamping plate to rotate.

[0029] The second guide roller is set on the elastic clamping plate. When the wood-plastic board is clamped and limited to the left and right, it can move back and forth with the conveyor belt.

[0030] Preferably, the chain conveyor belt and the transport block constitute a chain transmission structure.

[0031] Preferably, the connector includes:

[0032] Multiple connecting strips are fixedly installed at the lower end of the transport block;

[0033] A collar is fixedly installed at the lower end of the connecting bar and sleeved and fixed on the rotating shaft of the chain conveyor belt.

[0034] Preferably, the elastic pressing element includes:

[0035] Multiple rotating bars are mounted on the mounting plate, and the multiple rotating bars are arranged in an array on the mounting plate and are inclined towards the transfer unit. The upper end of each rotating bar is rotatably mounted on the mounting plate, and the lower end is rotatably mounted with a pressing roller.

[0036] Multiple limiting posts are provided on the mounting plate, so that the rotating bar can be tilted and limited when the wood-plastic board is not pressed, thus achieving the tilted arrangement of the rotating bar;

[0037] Multiple connecting posts, all of which are fixedly mounted on the rotating bar;

[0038] An elastic element, one end of which is fixedly mounted on a connecting post, and the other end of which is fixedly mounted on a limiting post used to limit the installation strip.

[0039] Preferably, the synchronous movement component includes:

[0040] The first gear is located at the rotating end of the elastic clamping plate;

[0041] A second gear meshes with the first gear, and the second gear is rotatably connected to the side wall of the conveyor belt;

[0042] A rack plate connected to a belt support bracket, wherein the rack plate is meshed with a second gear;

[0043] When the rack plate rises on the belt support, it drives the second gear and the first gear to rotate, which in turn drives the elastic clamping plate to rotate, thereby achieving clamping and limiting of one end of the wood-plastic board.

[0044] Compared with the prior art, the beneficial effects of the present invention are:

[0045] 1. This invention uses a conveyor belt, a conveying unit, a moving unit, a pressing unit, and a transfer unit in conjunction with a cutting mechanism to continuously transport and cut wood-plastic composite boards. At the same time, it can stably limit and clamp the wood-plastic composite boards during transfer and cutting, thereby preventing positional displacement of the wood-plastic composite boards during transfer and cutting, and thus achieving flush ends after cutting.

[0046] 2. By setting up clamping guides in the conveying unit, the present invention can simultaneously drive the clamping guides to clamp both ends of the wood-plastic composite board when the wood-plastic composite board is transported from the conveyor belt to the chain conveyor belt. This ensures that the wood-plastic composite board will not shift in the left and right position during the transfer.

[0047] 3. The present invention uses a pressing unit and a transport block on a chain conveyor belt in combination to increase the pressing force and frictional resistance on the wood-plastic composite board during the moving and cutting process, thereby preventing the wood-plastic composite board from shifting position during cutting and causing uneven cutting at the ends of the wood-plastic composite board.

[0048] 4. By using a set of mounting plates in a set of pressing units and the coordinated arrangement of elastic pressing parts on a set of mounting plates, this invention can press the wood-plastic composite board during cutting to prevent it from shifting position. At the same time, after the wood-plastic composite board is cut into multiple pieces, different segments of the wood-plastic composite board can be clamped to prevent them from falling off after cutting.

[0049] 5. The present invention, through the setting of the limiting post in the elastic pressing component, can not only limit the tilt angle of the rotating bar and realize the tilting arrangement of the rotating bar, but also, in conjunction with the elastic component, can elastically pull the previous rotating bar, so that the pressing roller on the rotating bar can achieve the pressing effect on the wood-plastic board. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0051] Figure 2 This is a schematic diagram showing the connection between the conveyor belt and the conveying unit of the present invention;

[0052] Figure 3 This is a cross-sectional view of the synchronous moving component of the present invention on the transmission belt;

[0053] Figure 4 This is a schematic diagram of a partial connection of the overall structure of the present invention;

[0054] Figure 5 This is a schematic diagram showing the connection between the transfer unit and the moving unit of the present invention;

[0055] Figure 6 This is a cross-sectional view of the moving unit of the present invention;

[0056] Figure 7 for Figure 4 Enlarged view of point A in the middle;

[0057] Figure 8 for Figure 6 Enlarged view of section B in the middle.

[0058] Reference numerals: 1-Transmission belt; 2-Conveying unit; 21-Transmission belt; 22-Belt bracket; 23-Power component; 24-Clamping guide component; 241-First guide roller; 242-Elastic clamping plate; 243-Synchronous moving component; 2431-First gear; 2432-Second gear; 2433-Rack plate; 244-Second guide roller; 3-Moving unit; 31-Chain type conveyor belt; 32-Transport block; 33-Connector; 331-Connecting bar; 332-Loop ring; 4-Pressing unit; 41-Mounting plate; 42-Elastic pressing component; 421-Rotating bar; 422-Pressing roller; 423-Limiting post; 424-Connecting post; 425-Elastic component; 5-Transfer unit; 51-Transfer conveyor belt; 52-Transfer conveyor belt; 6-Cutting mechanism. Detailed Implementation

[0059] The technical solutions of 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 of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0060] Example 1

[0061] Please see Figure 1-8 The present invention provides a technical solution: a continuous cutting device for wood-plastic composite boards, comprising:

[0062] Conveyor belt 1 is used to transport the sanded wood-plastic composite board to one side of the cutting mechanism 6;

[0063] Conveying unit 2, wherein the conveying unit 2 is disposed on the conveyor belt 1 on the side of the cutting mechanism 6;

[0064] The moving unit 3 is located at the cutting mechanism 6 and is used to move the wood-plastic board transferred from the conveying unit 2 to the cutting mechanism 6 for cutting.

[0065] Pressing unit 4, which is provided in multiple sets and located at the upper end of the moving unit 3 on both sides of the cutting mechanism 6, is used to press the wood-plastic board downward when the moving unit 3 moves the wood-plastic board to be cut by the cutting mechanism 6, so as to prevent the wood-plastic board from shifting during the cutting process.

[0066] The transfer unit 5 is located on the symmetrical side of the moving unit 3 on the conveyor belt 1, and is used to transport the cut wood-plastic composite board to the next process.

[0067] Please see Figure 2 , 3 The conveying unit 2 includes:

[0068] Multiple conveyor belts 21 are evenly spaced at the lower end of the conveyor belt 1;

[0069] A belt support 22 is disposed between multiple transmission belts 21 and is used to connect the belt support 22 into a whole.

[0070] The power component 23 is located at the lower end of the belt support 22 and is fixed on the transmission belt 1. It is used to realize the up and down movement of the belt support 22. The power component 23 can be set as an electric telescopic rod.

[0071] The clamping guide 24 is located on both sides of the wood-plastic board when it is transported to the end of the conveyor belt 1. At the same time, after the power unit 23 drives the belt support 22 to rise, the conveyor belt 21 transports the wood-plastic board to the moving unit 3, and the clamping guide 24 limits and clamps both ends of the wood-plastic board.

[0072] Please see Figure 6 , 8 The moving unit 3 includes:

[0073] Multiple sets of chain conveyor belts 31 are located between the conveyor belt 1 and the transfer unit 5, and are located at the lower end of the cutting mechanism 6;

[0074] Multiple transport blocks 32 with friction textures are provided. The transport blocks 32 are made of rubber material and are spaced apart on the chain conveyor belt 31. They are used in conjunction with the pressing unit 4 to prevent the wood-plastic board from shifting its position during cutting.

[0075] The connector 33 is disposed between the chain conveyor belt 31 and the transport block 32, so that the transport block 32 is fixed on the chain conveyor belt 31.

[0076] Please see Figure 4 , 5 7. The pressing unit 4 includes:

[0077] Mounting plate 41, the mounting plate 41 is set directly above the chain conveyor belt 31, and a set of pressing units 4 is provided with two mounting plates 41, each mounting plate 41 corresponding to the chain conveyor belt 31;

[0078] Two sets of elastic pressing parts 42 are symmetrically arranged on both sides of a mounting plate 41 to cooperate with the transport block 32 on the chain conveyor belt 31 to press and fix both sides of the wood-plastic board cutting part when the wood-plastic board is cut. There are multiple cutting mechanisms 6, and each cutting mechanism 6 is arranged between a set of mounting plates 41.

[0079] A set of pressing units 4 are mounted on a side conveyor belt 52 via a mounting frame, wherein the mounting plate 41 is movably mounted on the mounting frame to achieve the distance between the elastic pressing member 42 and the transport block 32;

[0080] Please see Figure 1 , 6 The transfer unit 5 includes:

[0081] A transfer conveyor belt 51 is disposed on the other side of the chain conveyor belt 31 located on the transmission belt 21.

[0082] The transfer conveyor belt 52 is located on one side of the transfer transport belt 51 and is used to transport the cut wood-plastic composite board transported by the transfer transport belt 51 to the next process.

[0083] Please see Figure 3 The clamping guide 24 includes:

[0084] Multiple first guide rollers 241 are set at one end of the conveyor belt 1 to limit one end of the wood-plastic board;

[0085] The elastic clamp 242 is rotatably mounted on the conveyor belt 1 and is used to limit the other end of the wood-plastic board when the wood-plastic board is transported to the moving unit 3 by the conveyor belt 21.

[0086] Synchronous moving component 243 is provided on the elastic clamping plate 242 and the belt bracket 22 bracket. When the power component 23 drives the belt bracket 22 to rise, the synchronous moving component 243 synchronously drives the elastic clamping plate 242 to rotate.

[0087] The second guide roller 244 is disposed on the elastic clamping plate 242. When the wood-plastic board is clamped and limited to the left and right, it can move back and forth with the transmission belt 21 in conjunction with the first guide roller 241.

[0088] The chain conveyor belt 31 and the transport block 32 constitute a chain transmission structure, which allows the wood-plastic board to pass through the transport block 32 when the chain conveyor belt 31 rotates, thereby increasing its friction and preventing the wood-plastic board from shifting its position during cutting.

[0089] Please see Figure 8 The connector 33 includes:

[0090] Multiple connecting strips 331 are fixedly installed at the lower end of the transport block 32;

[0091] A collar 332 is fixedly installed at the lower end of the connecting bar 331 and sleeved and fixed on the rotating shaft of the chain conveyor belt 31.

[0092] Please see Figure 7 The elastic pressing member 42 includes:

[0093] Multiple rotating bars 421 are set on the mounting plate 41. The multiple rotating bars 421 are arranged in an array on the mounting plate 41 and are inclined towards the transfer unit 5. The upper end of the rotating bar 421 is rotatably set with the mounting plate 41, and the lower end is rotatably set with a pressing roller 422.

[0094] Multiple limiting posts 423 are provided on the mounting plate 41, so that the rotating bar 421 can be tilted and limited when the wood-plastic board is not pressed, thus realizing the tilted arrangement of the rotating bar 421.

[0095] Multiple connecting posts 424 are fixedly mounted on the rotating bar 421;

[0096] The elastic element 425 is fixed at one end to the connecting post 424 and at the other end to the limiting post 423 used to limit the installation strip. The elastic element 425 can be a compression spring. The number of limiting posts 423 is one more than the number of installation strips. When the chain conveyor belt 31 transports the wood-plastic board to the pressing roller 422, it will drive the pressing roller 422 to rotate, which will cause the installation strip to rotate and stretch the elastic element 425. This will cause the pressing roller 422 to exert a downward pressing force on the wood-plastic board. At the same time, it will work with the transport block 32 to make the wood-plastic board more stable during cutting.

[0097] Please see Figure 3 The synchronous moving component 243 includes:

[0098] The first gear 2431 is disposed at the rotating end of the elastic clamping plate 242;

[0099] A second gear 2432 meshes with the first gear 2431 and is rotatably connected to the side wall of the conveyor belt 1.

[0100] A rack plate 2433 connected to the belt bracket 22 is engaged with a second gear 2432.

[0101] When the belt bracket 22 rises, the rack plate 2433 drives the second gear 2432 and the first gear 2431 to rotate, thereby driving the elastic clamping plate 242 to rotate and achieve clamping and limiting of one end of the wood-plastic board.

[0102] Work steps:

[0103] Step 1: Conveyor belt 1 transports the sanded wood-plastic composite board to its end conveyor unit 2;

[0104] Step 2: The power component 23 drives the belt support 22 to rise, which in turn drives the transmission belt 21 to rise, so that the wood-plastic board on the transmission belt 1 rises. When the transmission belt 1 rises to the same height as the chain conveyor belt 31, the power component 23 stops working. During the rising process of the belt support 22, the synchronous moving component 243 is driven to work, so that the elastic clamp 242 rotates, so that the first clamping roller and the second clamping roller clamp the wood-plastic board, so as to achieve the end limit alignment of the wood-plastic board. Then, the transmission belt 21 rotates to transport the wood-plastic board onto the chain conveyor belt 31, and then descends and resets.

[0105] Step 3: When the chain conveyor belt 31 transports the wood-plastic composite board to the pressing roller 422, the elastic element 425 will stretch, driving the pressing roller 422 to rotate. At the same time, the mounting strip will rotate, causing the elastic element 425 to stretch again, so that the pressing roller 422 exerts a downward pressing force on the wood-plastic composite board. This, combined with the transport block 32, makes the wood-plastic composite board more stable during cutting.

[0106] Step 4: After cutting, the multiple wood-plastic composite boards will be transported to the next process by transfer conveyor belt 51 and transfer conveyor belt 52. The transfer distance is the same as that in step 2, but the end calibration process is missing.

[0107] 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.

[0108] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A continuous cutting device for wood-plastic composite boards, characterized in that, include: The conveyor belt (1) is used to transport the sanded wood-plastic board to one side of the cutting mechanism (6); Conveying unit (2), the conveying unit (2) is disposed on the conveyor belt (1) on the side of the cutting mechanism (6); The moving unit (3) is located at the cutting mechanism (6) and is used to move the wood-plastic board transferred from the conveying unit (2) to the cutting mechanism (6) for cutting. Pressing unit (4) is provided in multiple sets and is located at the upper end of the moving unit (3) on both sides of the cutting mechanism (6). It is used to press the wood-plastic board downward when the moving unit (3) moves the wood-plastic board to be cut by the cutting mechanism (6) to prevent the wood-plastic board from shifting during cutting. The transfer unit (5) is located on the symmetrical side of the moving unit (3) on the conveyor belt (1) and is used to transport the cut wood-plastic board to the next process. The conveying unit (2) includes: Multiple transmission belts (21) are evenly spaced at the lower end of the transmission belt (1); A belt support (22) is disposed between multiple transmission belts (21) and is used to connect the belt support (22) into a whole; The power component (23) is located at the lower end of the belt support (22) and fixed on the transmission belt (1) to realize the up and down movement of the belt support (22); Clamping guide (24) is provided on both sides of the wood-plastic board when the wood-plastic board is transported to the end of the conveyor belt (1). At the same time, after the power unit (23) drives the belt support (22) to rise, the conveyor belt (21) transports the wood-plastic board to the moving unit (3) and clamps the two ends of the wood-plastic board. The clamping guide (24) includes: Multiple first guide rollers (241) are set at one end of the conveyor belt (1) to limit one end of the wood-plastic board; Elastic clamp (242), which is rotatably mounted on the conveyor belt (1), is used to limit the other end of the wood-plastic board when the wood-plastic board is transported to the moving unit (3) by the conveyor belt (21); Synchronous moving component (243) is disposed between elastic clamp (242) and belt bracket (22). When the power component (23) drives the belt bracket (22) to rise, the synchronous moving component (243) synchronously drives the elastic clamp (242) to rotate. The second guide roller (244) is set on the elastic clamping plate (242). When the wood-plastic board is clamped and limited to the left and right, it can move back and forth with the transmission belt (21) in conjunction with the first guide roller (241). The synchronous moving component (243) includes: The first gear (2431) is located at the rotating end of the elastic clamp (242); A second gear (2432) meshes with the first gear (2431) and is rotatably connected to the side wall of the conveyor belt (1); A rack plate (2433) connected to a belt bracket (22), wherein the rack plate (2433) is meshed with a second gear (2432); When the belt bracket (22) rises, the rack plate (2433) drives the second gear (2432) and the first gear (2431) to rotate, thereby driving the elastic clamping plate (242) to rotate and achieve clamping and limiting of one end of the wood-plastic board.

2. The continuous cutting device for wood-plastic composite boards according to claim 1, characterized in that, The moving unit (3) includes: Multiple sets of chain conveyor belts (31) are located between the conveyor belt (1) and the transfer unit (5), and are located at the lower end of the cutting mechanism (6); Multiple transport blocks (32) with friction texture are spaced apart on the chain conveyor belt (31) to cooperate with the pressing unit (4) to prevent the wood-plastic board from shifting its position during cutting; A connector (33) is provided between the chain conveyor belt (31) and the transport block (32) to fix the transport block (32) on the chain conveyor belt (31).

3. The continuous cutting device for wood-plastic composite boards according to claim 1, characterized in that, The pressing unit (4) includes: Mounting plate (41), the mounting plate (41) is set directly above the chain conveyor belt (31), and a set of pressing units (4) is provided with two mounting plates (41), each mounting plate (41) corresponding to the chain conveyor belt (31); Two sets of elastic pressing parts (42) are symmetrically arranged on both sides of a mounting plate (41) to cooperate with the transport block (32) on the chain conveyor belt (31) to press and fix the two sides of the wood-plastic board cutting part when the wood-plastic board is cut.

4. The continuous cutting device for wood-plastic composite boards according to claim 1, characterized in that, The transfer unit (5) includes: A transfer conveyor belt (51) is provided on the other side of the chain conveyor belt (31) located on the transmission belt (21); The transfer conveyor belt (52) is located on one side of the transfer transport belt (51) and is used to transport the cut wood-plastic composite board transported by the transfer transport belt (51) to the next process.

5. A continuous cutting device for wood-plastic composite boards according to claim 2, characterized in that, The chain conveyor belt (31) and the transport block (32) constitute a chain transmission structure, so that when the chain conveyor belt (31) rotates, the wood-plastic board passes through the transport block (32) to increase its friction and prevent the wood-plastic board from shifting position during cutting.

6. A continuous cutting device for wood-plastic composite boards according to claim 2, characterized in that, The connector (33) includes: Multiple connecting strips (331) are fixedly installed at the lower end of the transport block (32); A collar (332) is fixedly installed at the lower end of the connecting bar (331) and sleeved and fixed on the rotating shaft of the chain conveyor belt (31).

7. A continuous cutting device for wood-plastic composite boards according to claim 3, characterized in that, The elastic pressing element (42) includes: Multiple rotating bars (421) are arranged on the mounting plate (41). The multiple rotating bars (421) are arranged in an array on the mounting plate (41) and are inclined towards the transfer unit (5). The upper end of the rotating bar (421) is rotatably set with the mounting plate (41), and the lower end is rotatably set with a pressing roller (422). Multiple limiting posts (423) are provided on the mounting plate (41) so that the rotating bar (421) can be tilted and limited when the wood-plastic board is not pressed, so that the rotating bar (421) can be tilted and arranged. Multiple connecting posts (424) are fixedly mounted on the rotating bar (421); The elastic element (425) is fixed at one end on the connecting post (424) and at the other end on the limiting post (423) used to limit the installation strip.

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