Synchronous lifting belt conveying device

Abstract

The invention relates to the technical field of edge bonding machines, in particular to a synchronous lifting belt conveying device which comprises a belt conveying platform and a synchronous lifting mechanism arranged at the bottom of the belt conveying platform. A feeding guide assembly, an anti-return conveying assembly, a converging opening guide assembly, a driving belt conveying assembly and a belt cutting device are sequentially arranged on the belt conveying platform in the belt conveying direction of the belt conveying guide groove. The use flexibility and reliability are improved; the synchronous lifting mechanism and the belt conveying platform are integrated, feeding guiding, anti-return conveying, active belt conveying and overall height synchronous adjustment of the cutter assembly are achieved, the problem of assembly dislocation caused by traditional segmented adjustment is solved, the belt conveying platform is designed to be capable of ascending and descending, the height parameters of multiple assemblies are calibrated through one key, the height requirements of different production line interfaces are met, and the production efficiency is improved. And the universality of the equipment is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of edge banding machines, and in particular to a belt feeding device with synchronous lifting. Background Art

[0002] In the field of sheet processing, the transmission stability, anti-backward movement ability, and height adaptability of the edge banding belt conveying device directly affect the edge banding quality and production efficiency. In the prior art, the edge banding belt conveying device generally has the following defects: during the transmission process, the edge banding belt is prone to backward movement, resulting in misalignment of the edge banding glue layer to form a glue-free area; the complex mechanical structure makes maintenance difficult. For example, the anti-backward movement mechanism relies on a single friction wheel that is easily worn, and the feeding guide lacks a height self-locking function, resulting in frequent deviation, affecting the normal transmission of the edge banding belt, and further affecting the edge banding quality. Summary of the Invention

[0003] In view of the problems in the prior art, the present invention provides a belt feeding device with synchronous lifting to improve the use flexibility and reliability. The present invention integrates a synchronous lifting mechanism and a belt feeding platform to achieve the overall height synchronous adjustment of the feeding guide, anti-backward movement conveying, active belt feeding, and cutting knife assembly, breaking through the component misalignment problem caused by traditional segmented adjustment. The belt feeding platform is designed to be liftable, enabling one-key calibration of the height parameters of multiple components to adapt to the height requirements of different production line interfaces, and greatly improving the versatility of the equipment.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention provides a belt feeding device with synchronous lifting, which includes a belt feeding platform and a synchronous lifting mechanism installed at the bottom of the belt feeding platform. A belt feeding guide groove is provided on the belt feeding platform. Along the belt feeding direction of the belt feeding guide groove on the belt feeding platform, a feeding guide component, an anti-backward movement conveying component, a converging inlet guide component, an active belt feeding component, and a belt cutting device are sequentially arranged. The synchronous lifting mechanism is used to adjust the height of the belt feeding platform. The edge banding belt enters the anti-backward movement conveying component through the feeding guide component. The anti-backward movement conveying component is used to drive the edge banding belt to be unidirectionally conveyed forward along the belt feeding guide groove into the converging inlet guide component. The converging inlet guide component is used to guide the edge banding belt to be conveyed into the active belt feeding component. The active belt feeding component is used to feed the edge banding belt into the belt cutting device. The belt cutting device is used to cut the edge banding belt.

[0006] Among them, the feeding guiding component includes a feeding guiding base and a plurality of rows of feeding guiding roller groups rotatably arranged at the bottom of the feeding guiding base. On one side of the feeding guiding base, a plurality of height limiting rods are also arranged at intervals in a row. The height limiting rods are slidably connected to one side of the feeding guiding base, and each height limiting rod corresponds to each feeding guiding roller group; on one side of the feeding guiding base, a plurality of height limiting clamping elastic pieces are also arranged at intervals in a row. One end of the height limiting clamping elastic piece is detachably connected to one side of the feeding guiding base, and a first clamping hole is arranged at the other end of the height limiting clamping elastic piece. The height limiting rods correspond to the height limiting clamping elastic pieces one by one, and the upper end of the height limiting rod passes through the first clamping hole.

[0007] Among them, the anti-backward conveying component includes an anti-backward transmission base, an anti-backward transmission driving member, an anti-backward component, a driving wheel rotatably arranged on the anti-backward transmission base, and a rolling wheel rotatably arranged on the anti-backward transmission base. The anti-backward transmission driving member is installed on the anti-backward transmission base and is used to drive the driving wheel to rotate; the anti-backward component includes a swinging base, an anti-backward driving seat and a front-back driving member. A belt feeding sub-wheel is rotatably arranged at one end of the swinging base close to the driving wheel, a one-way sub-wheel is rotatably arranged at one end of the swinging base close to the rolling wheel, a first hinge shaft is rotatably arranged at one end of the swinging base far from the transmission base, the front-back driving member is installed on the anti-backward driving seat, and the output end of the front-back driving member is movably connected to the swinging base. The front-back driving member is used to drive the swinging base to swing so that the belt feeding sub-wheel is slidably abutted against the driving wheel or the one-way sub-wheel is slidably abutted against the rolling wheel.

[0008] Among them, a second hinge shaft is also rotatably arranged on the swinging base. A pulling block is connected to the output end of the front-back driving member, and the pulling block is movably connected to the second hinge shaft.

[0009] Among them, a third hinge shaft is rotatably arranged at one end of the anti-backward driving seat far from the transmission base.

[0010] Among them, the confluence inlet guiding component includes a first confluence inlet guiding plate, a second confluence inlet guiding plate and a confluence inlet height limiting plate. The first confluence inlet guiding plate and the second confluence inlet guiding plate are arranged in a V shape. A confluence outlet gap is formed between one end of the first confluence inlet guiding plate and one end of the second confluence inlet guiding plate. A sealing belt confluence inlet is formed between the other end of the first confluence inlet guiding plate and the other end of the second confluence inlet guiding plate. The confluence inlet height limiting plate is horizontally arranged in the sealing belt confluence inlet. A confluence inlet height limiting adjusting block is arranged at the upper end of the confluence inlet height limiting plate, and a number of first connection holes are arranged on the confluence inlet height limiting adjusting block.

[0011] Among them, the active tape feeding assembly includes an active tape feeding base, an active tape feeding driving member, an active tape feeding wheel, a driven tape feeding wheel, a tape feeding driven seat, and a driven tape feeding driving member. The active tape feeding base is installed on the tape feeding platform. The active tape feeding driving member is installed at the bottom of the active tape feeding base. The active tape feeding wheel is rotatably arranged on the active tape feeding base. The active tape feeding driving member is used to drive the active tape feeding wheel to rotate. The driven tape feeding wheel is rotatably arranged on the tape feeding driven seat. The driven tape feeding wheel is located on one side of the active tape feeding wheel. The tape feeding driven seat is slidably arranged on the tape feeding platform. The driven tape feeding driving member is installed on the tape feeding platform. The driven tape feeding driving member is used to drive the tape feeding driven seat to move back and forth.

[0012] Among them, the tape cutting device includes a tape cutting driving member, a tape cutting driving base, a main blade, a tape cutting guide plate, a secondary blade, and an angle adjustment mechanism. The secondary blade is installed at the front end of the tape cutting guide plate. The main blade is slidably arranged on one side of the tape cutting guide plate. The front end of the main blade is arranged opposite to the blade edge of the secondary blade. An inlet for the edge sealing tape to enter is formed between the secondary blade and the front end of the tape cutting guide plate. The front end of the tape cutting driving base is fixedly connected to the tape cutting guide plate. The tape cutting driving member is installed on the tape cutting driving base. The tape cutting driving member is used to drive the main blade to move back and forth. A rotating base is arranged on the other side of the tape cutting guide plate. A rotating rod is rotatably arranged in the rotating base. The angle adjustment mechanism includes an angle adjustment seat, a tightening screw threadedly connected to the angle adjustment seat, and a locking screw threadedly connected to the angle adjustment seat. The front end of the locking screw is movably connected to the tape cutting guide plate. A reset elastic member is sleeved on the outer periphery of the locking screw. Two ends of the reset elastic member are respectively connected to the tape cutting guide plate and the angle adjustment seat. The front end of the tightening screw abuts against one side of the tape cutting guide plate.

[0013] Among them, a tape cutting guide groove is arranged on one side of the tape cutting guide plate. The main blade is slidably arranged in the tape cutting guide groove.

[0014] Among them, an upper guiding and limiting assembly is arranged between the anti-backward conveying assembly and the converging inlet guiding assembly. The upper guiding and limiting assembly includes an upper guiding and limiting seat and a row of upper guiding and limiting rods arranged at intervals on the guiding and limiting seat. An upper guiding groove is arranged at the lower end of the upper guiding and limiting rod.

[0015] Among them, the synchronous lifting mechanism includes a bottom plate, a transmission assembly, three synchronous adjustment bases, and three up-and-down sliding assemblies; the three synchronous adjustment bases are respectively installed on the bottom plate and are distributed in a triangular shape, and each synchronous adjustment base corresponds to each up-and-down sliding assembly one by one. The up-and-down sliding assembly is arranged to slide up and down on the synchronous adjustment base, and the upper end of the up-and-down sliding assembly is connected to the lower end surface of the belt feeding platform;

[0016] A synchronous adjustment member is provided on one side of one of the synchronous adjustment bases. The synchronous adjustment member is connected to the transmission assembly, and the transmission assembly is respectively connected to the three up-and-down sliding assemblies. The synchronous adjustment member and the transmission assembly cooperate to control the three up-and-down sliding assemblies to move up and down synchronously.

[0017] Advantages of the present invention:

[0018] The present invention is ingeniously designed. During its operation, the edge banding tape enters the belt feeding guide groove on the belt feeding platform via the feeding guiding assembly. The edge banding tape sequentially passes through the anti-backward conveying assembly, the converging inlet guiding assembly, the active belt feeding assembly, and the tape cutting device. The feeding guiding assembly is used for guiding and limiting the edge banding tape. The anti-backward conveying assembly is used to drive the edge banding tape to be conveyed forward unidirectionally along the belt feeding guide groove into the converging inlet guiding assembly, preventing the edge banding tape from retreating, ensuring the stability of the transmission, and avoiding the influence of the edge banding tape retreat on the edge banding quality. Further, the converging inlet guiding assembly guides the edge banding tape into the active belt feeding assembly, and the active belt feeding assembly conveys the edge banding tape to the tape cutting device for cutting and sending out; further, the synchronous elevator is used to adjust the overall height of the belt feeding platform to realize the synchronous adaptation of the feeding guiding assembly, the anti-backward conveying assembly, the converging inlet guiding assembly, the active belt feeding assembly, and the tape cutting device to different input heights of the edge banding tape, improving the flexibility and reliability of use; the present invention integrates the synchronous lifting mechanism and the belt feeding platform, realizes the overall height synchronous adjustment of the feeding guiding, anti-backward conveying, active belt feeding, and cutting knife assemblies, breaks through the component misalignment problem caused by traditional segmented adjustment, adopts the design of the liftable belt feeding platform, enables one-key calibration of the height parameters of multiple components, adapts to the height requirements of different production line interfaces, and greatly improves the versatility of the equipment. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of a belt feeding device with synchronous lifting of the present invention.

[0020] Figure 2 It is another perspective structural schematic diagram of a belt feeding device with synchronous lifting of the present invention.

[0021] Figure 3 It is a schematic structural diagram of the synchronous lifting mechanism of the present invention.

[0022] Figure 4Schematic structural diagram of the feeding guiding component of the present invention.

[0023] Figure 5 Schematic structural diagram of the anti-backward conveying component of the present invention.

[0024] Figure 6 Another perspective schematic structural diagram of the anti-backward conveying component of the present invention.

[0025] Figure 7 Schematic structural diagram of the converging inlet guiding component of the present invention.

[0026] Figure 8 Schematic structural diagram of the active tape feeding component of the present invention.

[0027] Figure 9 Schematic structural diagram of the tape cutting device of the present invention.

[0028] Figure 10 Another perspective schematic structural diagram of the tape cutting device of the present invention.

[0029] Figure 11 Schematic structural diagram of the tape outlet height limiting component of the present invention.

[0030] Figure 12 Schematic structural diagram of the upper guiding and limiting component of the present invention.

[0031] In Figures 1 to 12 The reference numerals include:

[0032] 100, tape feeding platform; 200, synchronous lifting mechanism; 300, feeding guiding component; 400, anti-backward conveying component; 500, converging inlet guiding component; 600, active tape feeding component; 700, tape cutting device; 800, tape outlet height limiting component; 900, upper guiding and limiting component;

[0033] 1, bottom plate; 2, synchronous adjusting member; 3, first synchronous adjusting base; 4, second synchronous adjusting base; 5, third synchronous adjusting base; 6, first sliding shaft; 7, first upper mounting plate; 8, second sliding shaft; 9, second upper mounting plate; 10, third sliding shaft; 11, third upper mounting plate; 12, mounting hole; 13, first synchronous shaft; 14, second synchronous shaft; 15, first synchronous gear; 16, second synchronous gear; 17, third synchronous gear; 18, fourth synchronous gear; 19, third synchronous shaft; 20, fifth synchronous gear; 21, sixth synchronous gear; 22, seventh synchronous gear; 23, transfer support block; 24, eighth synchronous gear; 25, ninth synchronous gear; 26, tenth synchronous gear; 27, tape feeding guiding groove;

[0034] 301. Inlet guiding base; 302. Inlet guiding roller group; 303. Height limiting rod; 304. Height limiting clamping elastic piece; 305. First clamping hole;

[0035] 401. Anti-backward transmission base; 402. Anti-backward transmission driving part; 403. Anti-backward component; 404. Driving wheel; 405. Rolling wheel; 406. Swing base; 407. Anti-backward driving seat; 408. Front-back driving part; 409. Belt feeding auxiliary wheel; 410. One-way auxiliary wheel; 411. First hinge shaft; 412. Second hinge shaft; 413. Third hinge shaft; 414. Guiding transmission housing; 415. Window; 416. Pulling block;

[0036] 501. First converging inlet guiding plate; 502. Second converging inlet guiding plate; 503. Height limiting plate at converging inlet; 504. Height limiting adjusting block at converging inlet; 505. First connection hole;

[0037] 601. Active belt feeding base; 602. Active belt feeding driving part; 603. Active belt feeding wheel; 604. Driven belt feeding wheel; 605. Driven belt feeding seat; 606. Driven belt feeding driving part; 701. Tape cutting driving part; 702. Tape cutting driving base; 703. Main blade; 704. Tape cutting guiding plate; 705. Knife auxiliary; 706. Tape feeding inlet; 707. Rotating base; 708. Rotating rod; 709. Angle adjusting seat; 710. Tightening screw; 711. Locking screw; 712. Reset elastic part; 713. Tape cutting guiding groove; 714. Bearing; 715. Shielding part; 716. Perforation; 717. Bolt;

[0038] 801. Height limiting plate at tape outlet; 802. Lifting plate; 803. Lifting adjustment base; 804. Lifting adjustment screw rod; 805. Lifting guide slide bar; 806. Limit connecting rod;

[0039] 901. Upper guiding limit seat; 902. Upper guiding limit rod; 903. Upper guiding groove; 904. Upper guiding clamping elastic piece. Detailed implementation mode

[0040] For the convenience of those skilled in the art to understand, the present invention will be further described below in conjunction with embodiments and the accompanying drawings. The content mentioned in the implementation mode does not limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0041] A belt feeding device with synchronous lifting, as Figures 1 to 12As shown, it includes a belt feeding platform 100 and a synchronous lifting mechanism 200 installed at the bottom of the belt feeding platform 100. The belt feeding platform 100 is provided with a belt feeding guide groove 27. The belt feeding platform 100 is provided with a feed guide component 300, an anti-backward conveying component 400, a confluence guide component 500, an active belt feeding component 600 and a belt cutting device 700 in sequence along the belt feeding direction of the belt feeding guide groove 27. The synchronous lifting mechanism 200 is used to adjust the height of the belt feeding platform 100. The edge banding enters the anti-backlash conveying assembly 400 via the feed guide assembly 300. The anti-backlash conveying assembly 400 is used to drive the edge banding to be transmitted forward along the belt feeding guide groove 27 in one direction to the confluence guide assembly 500. The confluence guide assembly 500 is used to guide the edge banding to be transmitted to the active belt feeding assembly 600. The active belt feeding assembly 600 is used to allow the edge banding to enter the belt cutting device 700. The belt cutting device 700 is used to cut the edge banding. Specifically, the embodiment of the present application is cleverly designed. When it is working, the edge banding belt enters the belt feeding guide groove 27 on the belt feeding platform 100 via the feed guide assembly 300, and the edge banding belt passes through the anti-backlash conveying assembly 400, the confluence guide assembly 500, the active belt feeding assembly 600 and the belt cutting device 700 in sequence. The feed guide assembly 300 is used to guide the input and limit the edge banding belt, and the anti-backlash conveying assembly 400 is used to drive the edge banding belt to be transmitted forward along the belt feeding guide groove 27 in one direction to the confluence guide assembly 500 to prevent the edge banding belt from backing up, ensure the stability of transmission, and avoid the edge banding belt backing up affecting the edge banding quality. Furthermore, the confluence guide assembly 500 guides the edge banding belt into the active belt feeding assembly 600, and conveys the edge banding belt to the belt cutting device 700 through the active belt feeding assembly 600 for cutting and sending out ; Furthermore, the synchronous elevator is used to adjust the overall height of the belt feeding platform 100, so that the feed guide component 300, the anti-backlash conveying component 400, the confluence guide component 500, the active belt feeding component 600 and the belt cutting device 700 can synchronously adapt to the input heights of different edge bandings, thereby improving the flexibility and reliability of use; the embodiment of the present application integrates the synchronous lifting mechanism 200 with the belt feeding platform 100 to achieve the overall synchronous adjustment of the height of the feed guide, anti-backlash conveying, active belt feeding and cutting knife components, breaking through the component misalignment problem caused by traditional segmented adjustment, and adopting the liftable design of the belt feeding platform 100, so that multiple component height parameters can be calibrated with one click, adapting to the interface height requirements of different production lines, greatly improving the versatility of the equipment. Actual measurements show that the adjustment time is reduced by 68% when switching the thickness of the plate, and the inclination rate of the edge banding feed is reduced by 92%.

[0042] In the embodiment of the present application, the feeding guiding assembly 300 includes a feeding guiding base 301 and a plurality of feeding guiding roller groups 302 rotatably arranged in a row at the bottom of the feeding guiding base 301. A plurality of height limiting rods 303 are also arranged at intervals in a row on one side of the feeding guiding base 301. The height limiting rods 303 are slidably connected up and down to one side of the feeding guiding base 301, and each height limiting rod 303 is correspondingly arranged with each feeding guiding roller group 302. A plurality of height limiting clamping elastic pieces 304 are also arranged at intervals in a row on one side of the feeding guiding base 301. One end of the height limiting clamping elastic piece 304 is detachably connected to one side of the feeding guiding base 301, and a first clamping hole 305 is arranged at the other end of the height limiting clamping elastic piece 304. The height limiting rods 303 and the height limiting clamping elastic pieces 304 are in one-to-one correspondence, and the upper end of the height limiting rod 303 passes through the first clamping hole 305. Specifically, each feeding guiding roller group 302 includes two feeding guiding roller bodies arranged in parallel. The upper ends of the feeding guiding roller bodies are rotatably connected to the bottom of the feeding guiding base 301, and the external edge sealing tape enters the tape feeding guiding groove 27 of the tape feeding platform 100 through the gap between the two parallel feeding guiding roller bodies. Among them, the fixing of the height limiting rod 303 is realized through the cooperation of the self-elastic force of the height limiting clamping elastic piece 304 and the first clamping hole 305. Of course, when it is necessary to slide up and down to adjust the height of the height limiting rod 303, the height limiting clamping elastic piece 304 is toggled to make the height limiting rod 303 disengage from the clamping of the first clamping hole 305, and then the height of the height limiting rod 303 can be adjusted.

[0043] In the embodiment of the present application, the anti-backward conveying assembly 400 includes an anti-backward transmission base 401, an anti-backward transmission driving member 402, an anti-backward member, a driving wheel 404 rotatably arranged on the anti-backward transmission base 401, and a rolling wheel 405 rotatably arranged on the anti-backward transmission base 401. The anti-backward transmission driving member 402 is installed on the anti-backward transmission base 401 and is used to drive the driving wheel 404 to rotate. The anti-backward member includes a swinging base 406, an anti-backward driving seat 407, and a front-back driving member 408. A belt feeding auxiliary wheel 409 is rotatably arranged at one end of the swinging base 406 close to the driving wheel 404, a one-way auxiliary wheel 410 is rotatably arranged at one end of the swinging base 406 close to the rolling wheel 405, a first hinge shaft 411 is rotatably arranged at one end of the swinging base 406 away from the anti-backward transmission base 401. The front-back driving member 408 is installed on the anti-backward driving seat 407, and the output end of the front-back driving member 408 is movably connected to the swinging base 406. The front-back driving member 408 is used to drive the swinging base 406 to swing, so that the belt feeding auxiliary wheel 409 is in sliding contact with the driving wheel 404 or the one-way auxiliary wheel 410 is in sliding contact with the rolling wheel 405. Preferably, the anti-backward transmission driving member 402 is a motor; the front-back driving member 408 is a cylinder. Of course, the swinging base 406 can be rotatably connected to the belt feeding platform 100 through the first hinge shaft 411.

[0044] Specifically, the edge banding tape for edge banding the board passes between the rolling wheel 405 and the one-way auxiliary wheel 410, and between the driving wheel 404 and the belt feeding auxiliary wheel 409. When the anti-backward conveying assembly 400 works, the anti-backward transmission driving member 402 drives the driving wheel 404 to rotate. When the cylinder retracts, it drives the swinging base 406 to swing, driving the belt feeding auxiliary wheel 409 to be in sliding contact with the driving wheel 404, clamping the edge banding tape and moving it forward. When the cylinder extends, it drives the swinging base 406 to swing, and the belt feeding auxiliary wheel 409 moves away from the driving wheel 404. At this time, the one-way auxiliary wheel 410 abuts against the rolling wheel 405 to clamp the edge banding, preventing the edge banding from retreating, ensuring the stability and reliability of the edge banding tape conveying during the edge banding of the board, and being beneficial to improving the edge banding quality of the board.

[0045] Among them, a second hinge shaft 412 is also rotatably provided on the swing base 406. The output end of the front and rear drive member 408 is connected with a pull block 416, and the pull block 416 is movably connected with the second hinge shaft 412. Among them, a third hinge shaft 413 is rotatably provided at one end of the anti-backward drive base 407 away from the anti-backward transmission base 401. Specifically, under the above settings, it is convenient for the output end of the front and rear drive member 408 to drive the swing base 406 to swing after being connected to the second hinge shaft 412. At the same time, through the articulated design, a certain movement space is provided for the front and rear drive member 408, avoiding the hard structure from being locked and unable to work properly, and improving the working reliability and stability. Of course, the anti-backward drive base 407 can be rotatably connected to the anti-backward transmission base 401 or the external equipment workbench through the third hinge shaft 413.

[0046] Among them, a guiding transmission housing 414 is also installed on the anti-backward transmission base 401. The rolling wheel 405 is located inside the guiding transmission housing 414. The driving wheel 404 is located at the front end of the guiding transmission housing 414. Windows 415 are opened on both sides of the guiding transmission housing 414. Both sides of the rolling wheel 405 respectively protrude out of the windows 415 on both sides. Specifically, under this setting, the guiding transmission housing 414 can play a role in guiding the transmission of the edge banding tape. And in cooperation with the fact that both sides of the rolling wheel 405 respectively protrude out of the windows 415 on both sides and the driving wheel 404 is located at the front end of the guiding transmission housing 414, it ensures the stable transmission of the edge banding tape. Both sides of the rolling wheel 405 respectively protrude out of the windows 415 on both sides to cooperate with the one-way auxiliary wheel 410 to realize the function of preventing backward movement.

[0047] Among them, the number of the anti-backward components 403 is two. The two anti-backward components 403 are respectively located on both sides of the transmission base. The tape feeding auxiliary wheels 409 of the two anti-backward components 403 are respectively located on both sides of the driving wheel 404. The one-way auxiliary wheels 410 of the two anti-backward components 403 are respectively located on both sides of the rolling wheel 405. Specifically, with the setting of the two anti-backward components 403, it can realize the transmission of two groups of edge banding tapes on both sides of a single driving wheel 404 respectively, which is beneficial to improving the edge banding processing efficiency of the board.

[0048] In the embodiment of the present application, the active tape feeding assembly 600 includes an active tape feeding base 601, an active tape feeding driving member 602, an active tape feeding wheel 603, a driven tape feeding wheel 604, a tape feeding driven seat 605 and a driven tape feeding driving member 606. The active tape feeding base 601 is installed on the tape feeding platform 100. The active tape feeding driving member 602 is installed at the bottom of the active tape feeding base 601. The active tape feeding wheel 603 is rotatably arranged on the active tape feeding base 601. The active tape feeding driving member 602 is used to drive the active tape feeding wheel 603 to rotate. The driven tape feeding wheel 604 is rotatably arranged on the tape feeding driven seat 605. The driven tape feeding wheel 604 is located on one side of the active tape feeding wheel 603. The tape feeding driven seat 605 is slidably arranged on the tape feeding platform 100. The driven tape feeding driving member 606 is installed on the tape feeding platform 100. The driven tape feeding driving member 606 is used to drive the tape feeding driven seat 605 to move back and forth. Among them, the active tape feeding driving member 602 is a motor, and the driven tape feeding driving member 606 is a cylinder. Specifically, under the above settings, when it is necessary to drive the edge sealing tape to move forward into the tape cutting device 700, the active tape feeding driving member 602 drives the active tape feeding wheel 603 to rotate, and the driven tape feeding driving member 606 drives the tape feeding driven seat 605 to move forward and approach the active tape feeding base 601, so that the driven tape feeding wheel 604 approaches and slidably abuts against the active tape feeding wheel 603. The edge sealing tape passes between the active tape feeding wheel 603 and the driven tape feeding wheel 604. Through the rotation of the active tape feeding wheel 603, the edge sealing tape is driven to move forward into the tape cutting device 700.

[0049] In an embodiment of the present application, the tape cutting device 700 includes a tape cutting driving member 701, a tape cutting driving base 702, a main blade 703, a tape cutting guiding plate 704, a secondary blade 705, and an angle adjusting mechanism. The secondary blade 705 is installed at the front end of the tape cutting guiding plate 704. The main blade 703 is slidably disposed on one side of the tape cutting guiding plate 704. The front end of the main blade 703 is disposed opposite to the blade edge of the secondary blade 705. An inlet 706 for the edge sealing tape to enter is formed between the secondary blade 705 and the front end of the tape cutting guiding plate 704. The front end of the tape cutting driving base 702 is fixedly connected to the tape cutting guiding plate 704. The tape cutting driving member 701 is installed on the tape cutting driving base 702. The tape cutting driving member 701 is used to drive the main blade 703 to move back and forth. A rotating base 707 is disposed on the other side of the tape cutting guiding plate 704. A rotating rod 708 is rotatably disposed in the rotating base 707. The angle adjusting mechanism includes an angle adjusting seat 709, a tightening screw 710 threadedly connected to the angle adjusting seat 709, and a locking screw 711 threadedly connected to the angle adjusting seat 709. The front end of the locking screw 711 is movably connected to the tape cutting guiding plate 704. A reset elastic member 712 is sleeved on the outer periphery of the locking screw 711. The two ends of the reset elastic member 712 are respectively connected to the tape cutting guiding plate 704 and the angle adjusting seat 709. The front end of the tightening screw abuts against one side of the tape cutting guiding plate 704. Wherein, the rotating rod 708 is rotatably disposed on an external workbench, and the angle adjusting seat 709 is fixed on the external workbench.

[0050] Specifically, when the tape cutting device 700 of the embodiment of the present application is in operation, the edge banding tape is input from the tape inlet 706, passes between the front end of the main blade 703 and the cutting edge of the auxiliary blade 705. The tape cutting guide plate 704 guides the movement of the main blade 703. The tape cutting driving member 701 drives the main blade 703 to move forward along the guide plate 704 close to the cutting edge of the auxiliary blade 705 to cut the edge banding tape; wherein, the tape cutting guide plate 704 can rotate under the action of the rotating rod 708, and can synchronously drive the tape cutting driving base 702 and the tape cutting guide plate 704 to swing synchronously. In this setting, since the edge banding tape always moves from the tape inlet 706 in the feeding direction, when cutting the tape, because the edge banding tape is still driven forward by the board, therefore, the tape cutting guide plate 704 and the main blade 703 will be subjected to a forward force. In order to offset the pulling force of the edge banding tape, an elastic reset member is provided, and under the action of the elastic reset member, it is reset to pull the guide plate 704 back to the original position, thereby avoiding the situation of scraping glue caused by the pulling force of tape cutting, ensuring that tape cutting will not cause a glue-free area, and ensuring the edge banding quality; in addition, in the embodiment of the present application, a tightening screw 710 is designed. In this setting, the angle of the guide plate 704 can be adjusted, and then the orientation of the main blade 703 can be adjusted to realize the adjustment of the tape cutting angle, which can meet various tape cutting requirements. By using the tightening screw 710 to hold the guide plate 704, the orientation angle is ensured to be unchanged, which is beneficial to improving the accuracy and reliability of tape cutting.

[0051] Wherein, a tape cutting guide groove 713 is provided on one side of the tape cutting guide plate 704, and the main blade 703 is slidably arranged in the tape cutting guide groove 713. Specifically, in this setting, the stability and reliability of the movement of the main blade 703 are ensured.

[0052] Wherein, a bearing 714 is arranged between the rotating rod 708 and the rotating base 707. Specifically, in this setting, the swinging of the tape cutting guide plate 704 is realized, and the stability and smoothness of the swinging are improved.

[0053] Wherein, a shielding member 715 is detachably connected to the front end of the other side of the tape cutting guide plate 704, and the shielding member 715 is used to shield the tape inlet 706. Wherein, a through hole 716 is provided at the upper end of the shielding member 715, and a second connection hole is provided at the front end of the upper side of the tape cutting guide plate 704. A bolt 717 is detachably connected in the second connection hole, and the second connection hole is correspondingly arranged with the through hole 716. The bolt 717 is used to lock the shielding member 715 on the tape cutting guide plate 704. Specifically, in the above setting, it is convenient to assemble and disassemble the shielding member 715. On the one hand, it is convenient for replacement. On the other hand, it is convenient to adjust the position of the shielding member 715, which is convenient to shield or make way for the tape inlet 706. When shielding the tape inlet 706, it prevents the edge banding tape from entering and causing misoperation of tape feeding, playing a safety role.

[0054] In the embodiment of the present application, an upper guiding and limiting assembly 900 is provided between the anti-backward conveying assembly 400 and the converging inlet guiding assembly 500. The upper guiding and limiting assembly 900 includes an upper guiding and limiting seat 901 and a row of upper guiding and limiting rods 902 arranged at intervals on the guiding and limiting seat. A upper guiding groove 903 is provided at the lower end of the upper guiding and limiting rod 902. Specifically, in this setting, the upper guiding groove 903 is correspondingly arranged with the belt conveying guiding groove 27, and the upper guiding groove 903 is located directly above the belt conveying guiding groove 27. With the cooperation of the upper guiding groove 903 and the belt conveying guiding groove 27, the directional feeding of the edge sealing belt is realized. Further, the upper end of the upper guiding and limiting rod 902 is slidably arranged up and down on the upper guiding and limiting seat 901. A plurality of upper guiding and clamping elastic pieces 904 are arranged at intervals in a row on the upper guiding and limiting seat 901. One end of the upper guiding and clamping elastic piece 904 is detachably connected to one side of the upper guiding and limiting seat 901. The other end of the upper guiding and clamping elastic piece 904 is provided with a second clamping hole. The upper end of the upper guiding and limiting rod 902 passes through the second clamping hole. Through the self-elastic force of the upper guiding and clamping elastic piece 904 and the cooperation of the second clamping hole, the fixation of the upper guiding and limiting rod 902 is realized. Of course, when it is necessary to adjust the height of the upper guiding and limiting rod 902 up and down, the upper guiding and clamping elastic piece 904 is toggled to make the upper guiding and limiting rod 902 disengage from the clamping of the second clamping hole, and then the height of the upper guiding and limiting rod 902 can be adjusted.

[0055] In the embodiment of the present application, the converging inlet guiding assembly 500 includes a first converging inlet guiding plate 501, a second converging inlet guiding plate 502 and a converging inlet height limiting plate 503. The first converging inlet guiding plate 501 and the second converging inlet guiding plate 502 are arranged in a V-shaped layout. An inlet and outlet gap is formed between one end of the first converging inlet guiding plate 501 and one end of the second converging inlet guiding plate 502. A edge sealing belt converging inlet is formed between the other end of the first converging inlet guiding plate 501 and the other end of the second converging inlet guiding plate 502. The converging inlet height limiting plate 503 is horizontally arranged in the edge sealing belt converging inlet. A converging inlet height limiting adjusting block 504 is provided at the upper end of the converging inlet height limiting plate 503. The converging inlet height limiting adjusting block 504 is provided with a plurality of first connection holes 505. Specifically, in the above setting, the edge sealing belt enters the converging inlet guiding assembly 500 after passing through the upper guiding and limiting assembly 900. The edge sealing belt enters from the edge sealing belt converging inlet and then enters the active belt conveying assembly 600 from the inlet and outlet gap, so as to facilitate the forward transmission of the edge sealing belt by the active belt conveying assembly 600. The first converging inlet guiding plate 501 and the second converging inlet guiding plate 502 realize the guiding transmission of the edge sealing belt. Further, the height of the converging inlet height limiting plate 503 is adjusted to adapt to different heights of the edge sealing belt.

[0056] In the embodiment of the present application, the synchronous lifting and belt feeding device further includes an out-belt height limiting component 800. The out-belt height limiting component 800 includes an out-belt limiting and guiding plate 801, a lifting plate 802, and a lifting adjustment component. The lifting adjustment component includes a lifting adjustment base 803 and a lifting adjustment screw rod 804 rotatably arranged on the lifting adjustment base 803. A lifting guide slide rod 805 is further arranged on the lifting adjustment base 803. The lifting guide slide rod 805 slidably penetrates through the lifting plate 802. One end of the lifting adjustment screw rod 804 threadedly penetrates through the lifting plate 802. The lifting plate 802 is arranged in an L shape. A limiting connecting rod 806 is further installed at the other end of the lifting plate 802. The out-belt limiting and guiding plate 801 is installed at the lower end of the limiting connecting rod 806. The out-belt limiting and guiding plate 801 is arranged corresponding to the in-belt opening 706. When the edge-sealing belt enters from the in-belt opening 706 and then exits, the out-belt limiting and guiding plate 801 guides out the edge-sealing belt.

[0057] Further, the in-flow port height limiting adjustment block 504 of the in-flow port guiding component 500 is detachably connected to the lifting plate 802 through the cooperation of the first connection hole 505 and an external screw, so that while adjusting the height of the out-belt limiting and guiding plate 801, the height of the in-flow port height limiting plate 503 is synchronously adjusted.

[0058] In the embodiment of the present application, multiple belt feeding guide grooves 27 and related components can be provided, so that the embodiment of the present application is set as a multi-way belt feeding structure. During one operation, only one way is used, and the other ways are used as backups. Since the speed is very fast during edge sealing and the consumption of the edge-sealing belt is quite large, when the edge-sealing belt of one way is used up, the system can immediately switch to the edge-sealing belt of other ways, so that continuous belt feeding can be carried out without stopping the machine (the staff can replenish the edge-sealing belt in the path where the edge-sealing belt is used up), thereby improving the efficiency and reducing the labor intensity of the workers.

[0059] In the embodiment of the present application, the synchronous lifting mechanism 200 includes a base plate 1, a transmission assembly, three synchronous adjustment bases and three up-and-down sliding assemblies; the three synchronous adjustment bases are respectively mounted on the base plate 1 and are distributed in a triangular shape, each of the synchronous adjustment bases corresponds to each of the up-and-down sliding assemblies one by one, the up-and-down sliding assemblies are slidably arranged on the synchronous adjustment base, and the upper end of the up-and-down sliding assemblies is connected to the lower end surface of the tape feeding platform 100; a synchronous adjustment member 2 is arranged on one side of one of the synchronous adjustment bases, the synchronous adjustment member 2 is connected to the transmission assembly, the transmission assembly is respectively connected to the three up-and-down sliding assemblies, and the synchronous adjustment member 2 cooperates with the transmission assembly to control the three up-and-down sliding assemblies to move up and down synchronously. Specifically, under the above setting, when it is necessary to adjust the height of the tape feeding platform 100, the transmission assembly is driven by the synchronous adjustment member 2 to drive the three up-and-down sliding assemblies to move up and down synchronously at the same time, so as to drive the tape feeding platform 100 to move up and down; wherein, the three synchronous adjustment bases are respectively mounted on the base plate 1 and are distributed in a triangular shape, which ensures the structural strength and stability.

[0060] The three synchronous adjustment bases include a first synchronous adjustment base 3, a second synchronous adjustment base 4 and a third synchronous adjustment base 5, and the three up and down sliding components include a first up and down sliding component, a second up and down sliding component and a third up and down sliding component. The first up and down sliding component includes a first sliding shaft 6 and a first upper mounting plate 7 installed on the upper end of the first sliding shaft 6, the second up and down sliding component includes a second sliding shaft 8 and a second upper mounting plate 9 installed on the upper end of the second sliding shaft 8, and the third up and down sliding component includes a third sliding shaft 10 and a third upper mounting plate 11 installed on the upper end of the third sliding shaft 10. The upper end of the first sliding shaft 6 is rotatably connected to the first upper mounting plate 7, the upper end of the second sliding shaft 8 is rotatably connected to the second upper mounting plate 9, and the upper end of the third sliding shaft 10 is rotatably connected to the third upper mounting plate 11; the first upper mounting plate 7, the second upper mounting plate 9 and the third upper mounting plate 11 are all penetrated with mounting holes 12, and the mounting holes 12 are used to be connected to the bottom of the tape feeding platform 100 after cooperating with external screws;

[0061] The transmission assembly includes a first synchronization shaft 13 and a second synchronization shaft 14, one end of the first synchronization shaft 13 is rotationally connected to the first synchronization adjustment base 3, the other end of the first synchronization shaft 13 is rotationally connected to the second synchronization adjustment base 4, a first synchronization gear 15 is sleeved on the outer periphery of one end of the first synchronization shaft 13, a second synchronization gear 16 is fixedly sleeved on the lower end of the first sliding shaft 6, the first synchronization gear 15 is meshed and transmission-connected with the second synchronization gear 16, and the first sliding shaft 6 is threadedly connected in the first synchronization adjustment base 3;

[0062] On the outer circumference of the other end of the first synchronizing shaft 13, a third synchronizing gear 17 and a fourth synchronizing gear 18 are respectively sleeved. The third synchronizing gear 17 is located between the second synchronizing gear 16 and the fourth synchronizing gear 18. A third synchronizing shaft 19 is horizontally rotatably arranged on the second synchronizing adjustment base 4. At both ends of the third synchronizing shaft 19, a fifth synchronizing gear 20 and a sixth synchronizing gear 21 are respectively fixedly sleeved. The second sliding shaft 8 is threadedly connected inside the second synchronizing adjustment base 4. At the lower end of the second sliding shaft 8, a seventh synchronizing gear 22 is fixedly sleeved. The fifth synchronizing gear 20 is meshed and drivingly connected with the third synchronizing gear 17. The sixth synchronizing gear 21 is meshed and drivingly connected with the seventh synchronizing gear 22;

[0063] A transfer support block 23 is further installed on the bottom plate 1. The transfer support block 23 is located on one side of the second synchronizing adjustment base 4. One end of the second synchronizing shaft 14 is rotatably connected to the transfer support block 23. The other end of the second synchronizing shaft 14 is rotatably connected to the third synchronizing adjustment base 5. At one end of the second synchronizing shaft 14, an eighth synchronizing gear 24 is fixedly sleeved. The eighth synchronizing gear 24 is meshed and drivingly connected with the fourth synchronizing gear 18. At the other end of the second synchronizing shaft 14, a ninth synchronizing gear 25 is fixedly sleeved. The third sliding shaft 10 is threadedly connected inside the third synchronizing adjustment base 5. At the lower end of the third sliding shaft 10, a tenth synchronizing gear 26 is fixedly sleeved. The ninth synchronizing gear 25 is meshed and drivingly connected with the tenth synchronizing gear 26; wherein, the synchronizing adjustment member 2 is rotatably arranged on the first synchronizing adjustment base 3.

[0064] Specifically, under the above settings, when it is necessary to adjust the height of the belt feeding platform 100, rotate the synchronizing adjustment member 2 to drive the first synchronizing shaft 13 to rotate, thereby driving the first synchronizing gear 15, the third synchronizing gear 17, the fourth synchronizing gear 18, the eighth synchronizing gear 24, the second synchronizing shaft 14 and the ninth synchronizing gear 25 to rotate. At this time, the first synchronizing gear 15 drives the second synchronizing gear 16 to rotate, and further drives the second sliding shaft 8 to move up and down. The third synchronizing gear 17 drives the fifth synchronizing gear 20 to rotate, and further drives the third synchronizing shaft 19 and the sixth synchronizing gear 21 to rotate. The sixth synchronizing gear 21 drives the seventh synchronizing gear 22 to rotate, and further drives the second sliding shaft 8 to move up and down. The ninth synchronizing gear 25 drives the tenth synchronizing gear 26 to rotate, and further drives the third sliding shaft 10 to move up and down, realizing driving the first upper mounting plate 7, the second upper mounting plate 9 and the third upper mounting plate 11 to move up and down synchronously.

[0065] The above are only the preferred embodiments of the present invention, and there is no limitation to the present invention in any form. Although the present invention is disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, when making some changes or modifications using the above-disclosed technical content into equivalent embodiments of equivalent changes, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical means of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. A belt feeding device with synchronous lifting, characterized in that: It includes a tape feeding platform and a synchronous lifting mechanism installed at the bottom of the tape feeding platform. A tape feeding guide groove is provided on the tape feeding platform. Along the tape feeding direction of the tape feeding guide groove on the tape feeding platform, a feeding guide component, an anti-backward conveying component, a converging inlet guide component, a main tape feeding component, and a tape cutting device are sequentially arranged. The synchronous lifting mechanism is used to adjust the height of the tape feeding platform. The edge sealing tape enters the anti-backward conveying component through the feeding guide component. The anti-backward conveying component is used to drive the edge sealing tape to be conveyed unidirectionally forward along the tape feeding guide groove into the converging inlet guide component. The converging inlet guide component is used to guide and convey the edge sealing tape into the main tape feeding component. The main tape feeding component is used to feed the edge sealing tape into the tape cutting device. The tape cutting device is used to cut the edge sealing tape.

2. The belt feeding device with synchronous lifting according to claim 1, characterized in that: The feeding guide component includes a feeding guide base and a plurality of rows of feeding guide roller groups rotatably arranged at the bottom of the feeding guide base. A plurality of height limiting rods are also arranged at one side of the feeding guide base at intervals in a row. The height limiting rods are slidably connected to one side of the feeding guide base. Each height limiting rod is correspondingly arranged with each feeding guide roller group. A plurality of height limiting clamping elastic pieces are also arranged at one side of the feeding guide base at intervals in a row. One end of the height limiting clamping elastic piece is detachably connected to one side of the feeding guide base. The other end of the height limiting clamping elastic piece is provided with a first clamping hole. The height limiting rods correspond to the height limiting clamping elastic pieces one by one. The upper end of the height limiting rod passes through the first clamping hole.

3. The belt feeding device for synchronous lifting according to claim 1, characterized in that: The anti-backward conveying component includes an anti-backward transmission base, an anti-backward transmission driving part, an anti-backward part, a driving wheel rotatably arranged on the anti-backward transmission base, and a rolling wheel rotatably arranged on the anti-backward transmission base. The anti-backward transmission driving part is installed on the anti-backward transmission base and is used to drive the driving wheel to rotate. The anti-backward part includes a swinging base, an anti-backward driving seat, and a front-back driving part. A tape feeding auxiliary wheel is rotatably arranged at one end of the swinging base close to the driving wheel. A one-way auxiliary wheel is rotatably arranged at one end of the swinging base close to the rolling wheel. A first hinge shaft is rotatably arranged at one end of the swinging base far from the transmission base. The front-back driving part is installed on the anti-backward driving seat. The output end of the front-back driving part is movably connected to the swinging base. The front-back driving part is used to drive the swinging base to swing so that the tape feeding auxiliary wheel is slidably abutted against the driving wheel or the one-way auxiliary wheel is slidably abutted against the rolling wheel.

4. A belt feeding device for synchronous lifting according to claim 3, characterized in that: A second hinge shaft is also rotatably arranged on the swinging base. A pulling block is connected to the output end of the front-back driving part. The pulling block is movably connected to the second hinge shaft.

5. The belt feeding device for synchronous lifting according to claim 3, wherein: A third hinge shaft is rotatably arranged at one end of the anti-backward driving seat far from the transmission base.

6. The belt feeding device for synchronous lifting according to claim 1, characterized in that: The inlet guiding assembly includes a first inlet guiding plate, a second inlet guiding plate and an inlet height limiting plate. The first inlet guiding plate and the second inlet guiding plate are arranged in a V shape. An inlet and outlet gap is formed between one end of the first inlet guiding plate and one end of the second inlet guiding plate. A sealing strip inlet is formed between the other end of the first inlet guiding plate and the other end of the second inlet guiding plate. The inlet height limiting plate is horizontally arranged in the sealing strip inlet. An inlet height limiting adjustment block is arranged at the upper end of the inlet height limiting plate. The inlet height limiting adjustment block is provided with a plurality of first connection holes.

7. The belt feeding device with synchronous lifting according to claim 1, characterized in that: The active belt feeding assembly includes an active belt feeding base, an active belt feeding driving member, an active belt feeding wheel, a driven belt feeding wheel, a belt feeding driven seat and a driven belt feeding driving member. The active belt feeding base is installed on the belt feeding platform. The active belt feeding driving member is installed at the bottom of the active belt feeding base. The active belt feeding wheel is rotatably arranged on the active belt feeding base. The active belt feeding driving member is used to drive the active belt feeding wheel to rotate. The driven belt feeding wheel is rotatably arranged on the belt feeding driven seat. The driven belt feeding wheel is located on one side of the active belt feeding wheel. The belt feeding driven seat is slidably arranged on the belt feeding platform. The driven belt feeding driving member is installed on the belt feeding platform. The driven belt feeding driving member is used to drive the belt feeding driven seat to move back and forth.

8. A belt feeding device for synchronous lifting according to claim 1, characterized in that: The belt cutting device includes a belt cutting driving member, a belt cutting driving base, a main blade, a belt cutting guiding plate, a sub-blade and an angle adjustment mechanism. The sub-blade is installed at the front end of the belt cutting guiding plate. The main blade is slidably arranged on one side of the belt cutting guiding plate. The front end of the main blade is arranged opposite to the cutting edge of the sub-blade. An inlet for the sealing strip to enter is formed between the sub-blade and the front end of the belt cutting guiding plate. The front end of the belt cutting driving base is fixedly connected to the belt cutting guiding plate. The belt cutting driving member is installed on the belt cutting driving base. The belt cutting driving member is used to drive the main blade to move back and forth. A rotating base is arranged on the other side of the belt cutting guiding plate. A rotating rod is rotatably arranged in the rotating base. The angle adjustment mechanism includes an angle adjustment seat, a tightening screw threadedly connected to the angle adjustment seat and a locking screw threadedly connected to the angle adjustment seat. The front end of the locking screw is movably connected to the belt cutting guiding plate. A reset elastic member is sleeved on the outer periphery of the locking screw. The two ends of the reset elastic member are respectively connected to the belt cutting guiding plate and the angle adjustment seat. The front end of the tightening screw abuts against one side of the belt cutting guiding plate.

9. The belt feeding device with synchronous lifting according to claim 1, wherein: An upper guiding and limiting assembly is arranged between the anti-backward conveying assembly and the inlet guiding assembly. The upper guiding and limiting assembly includes an upper guiding and limiting seat and a row of upper guiding and limiting rods arranged at intervals on the guiding and limiting seat. An upper guiding groove is arranged at the lower end of the upper guiding and limiting rod.

10. A belt feeding device with synchronous lifting according to claim 1, characterized in that: The synchronous lifting mechanism includes a bottom plate, a transmission assembly, three synchronous adjustment bases and three up-and-down sliding assemblies; the three synchronous adjustment bases are respectively installed on the bottom plate and are distributed in a triangular shape, each synchronous adjustment base corresponds to each up-and-down sliding assembly, the up-and-down sliding assembly is arranged to slide up and down on the synchronous adjustment base, and the upper end of the up-and-down sliding assembly is connected to the lower end surface of the belt feeding platform; One side of one of the synchronous adjustment bases is provided with a synchronous adjustment member, the synchronous adjustment member is connected to the transmission assembly, the transmission assembly is respectively connected to the three up-and-down sliding assemblies, and the synchronous adjustment member and the transmission assembly cooperate to control the three up-and-down sliding assemblies to move up and down synchronously.

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