A light portable working platform for directional pruning of garden hedges

Abstract

The application discloses a light operation platform for directional pruning of garden hedges, which comprises a support table, a rotating table and a direction wheel. The support table is provided in a cylindrical table body structure, and the side wall of the support table is provided with four connecting rods in an X-shaped structure. Three connecting rods are connected to the side wall of the ground stand. The ground stand is symmetrically connected to an auxiliary roller on one side. The inside of the ground stand connected to the connecting rod is penetrated by a lifting column. The bottom end of the lifting column is connected to the direction wheel. The rotating table is connected to the top end of the support table. The light operation platform for directional pruning of garden hedges is characterized in that the rotating handle drives the rotating ring to rotate, the rotating rod one and the rotating rod two are synchronized and rotated, the rotating rod one and the rotating rod two push the inserting plate one, the inserting plate one is clamped into the inside of the anti-skid slot, the height of the guide sliding rod is adjusted, the working height of the hedge machine is adjusted, the hedge machine keeps a stable height environment for pruning the garden hedge, and the hedge pruning process is completed at one time.

Description

Technical Field

[0001] The invention relates to the technical field of garden hedges, in particular to a portable operating platform for directional pruning of garden hedges. Background Art

[0002] In the urban greening environment, there are many hedges on both sides of the road. In order to better increase the ornamental value and meet the technical requirements of horizontal and vertical levels, trimming the hedges in the garden has become a new requirement for garden workers. Among them, hedge trimmers are used in the gardening process to trim hedges and green walls. By trimming, the height of shrubs and the thickness of vines are controlled to achieve the shape required by the urban greening environment. The shape of the hedges is an ideal landscape. In order to trim the hedges in a directional manner, workers need to trim them. However, there are some defects in the existing hedges during the leveling of seedlings, such as:

[0003] When trimming existing hedges, temporary wooden stakes need to be driven in and wires need to be pulled to meet the trimming needs and limit the leveling range of the hedge cutting height. This operation method is slow in overall trimming progress and requires constant observation of the height of the temporary wooden stakes and wires. In addition, as the hedge trimmer is trimming, it is easy for the wire to hit the wire, causing it to break, which affects the flatness of the hedge trimmer operation.

[0004] In response to the above problems, it is urgent to carry out innovative design based on the original garden hedge operation platform. Summary of the Invention

[0005] The purpose of the present invention is to provide a portable work platform for directional pruning of garden hedges, so as to solve the problem proposed in the above-mentioned background technology that temporary wooden stakes need to be driven and wires need to be pulled to limit the leveling range of the hedge cutting height. The overall pruning progress of this operation method is slow, and the hedge trimmer is prone to touch the wire while pruning, causing the wire to break easily, affecting the flatness of the hedge trimmer operation.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a portable work platform for directional pruning of garden hedges, comprising a support platform, which is configured as a cylindrical platform structure, wherein the side wall of the support platform is provided with four connecting rods in an X shape, and one side of three connecting rods is connected to the side wall of the platform frame, and one side of the platform frame is symmetrically connected to auxiliary rollers, and the interior of the platform frame connected to the connecting rods is penetrated by a lifting column, and the bottom end of the lifting column is rotatably connected to a steering wheel;

[0007] A turntable is rotatably connected to the top of the support platform, a limit frame is provided above the turntable, and an anti-slip slot is symmetrically provided on the inner wall of the limit frame, a mounting cover is engaged with the top opening of the limit frame, and the limit frame is internally slidably connected to the limit slide, and a plug-in plate 1 is symmetrically slidably connected to the inside of the limit slide;

[0008] A rotating ring is rotatably connected to one side of the limiting sliding table, an axis of the rotating ring is connected to one end of the handle, and two transmission ropes are symmetrically arranged inside the rotating ring, the limiting sliding table is connected to the guiding sliding rod through one side by a bolt, and a bearing sliding table is slidably connected inside the guiding sliding rod, and a protection plate is vertically arranged on the upper end of the bearing sliding table.

[0009] The above technical scheme can provide support and assistance for the hedge trimmer during operation.

[0010] Preferably, the top end of the support table is provided with a bearing structure rotatably connected to the rotating table, and the connecting rods on both sides of the support table are symmetrically arranged in parallel, and one end of the connecting rod is penetrated by the lifting column.

[0011] The above technical scheme provides support and installation for the limiting frame through the rotating table, which facilitates the hedge trimmer to handle branches.

[0012] Preferably, four telescopic columns are symmetrically and equidistantly arranged on the upper end of the ground frame, two telescopic columns are connected to the auxiliary frame at the top end, and the other two telescopic columns are connected to the support frame at the top end.

[0013] The above technical scheme provides support for the telescopic column through the ground frame, which facilitates the telescopic column to provide support for the auxiliary frame and the support frame.

[0014] Preferably, the auxiliary frame and the support frame are arranged in a vertical direction, the auxiliary frame is arranged in parallel above one side of the ground frame, and the support frame is symmetrically arranged with the ground frame on the other side with the center line of the support table.

[0015] The above technical scheme provides support for one end of the guiding sliding rod through the auxiliary frame and the support frame.

[0016] Preferably, the limiting frame is arranged in a U-shaped structure, the anti-skid slots arranged on the inner wall of the limiting frame are connected to the outer wall of the insertion plate, and one side of each of the two insertion plates abuts against both sides of the rotating rod.

[0017] The above technical scheme provides guiding treatment for height adjustment of the limiting sliding table through the limiting frame.

[0018] Preferably, the connecting plate is arranged on the inner wall of the limiting sliding table, one end of the cylindrical protrusion of the connecting plate penetrates one side of the limiting sliding table, and the side wall of one of the two insertion plates abuts against both sides of the connecting plate.

[0019] The above technical scheme provides installation for the insertion plate one through the limiting sliding table, so that the insertion plate one is connected to the anti-skid slot.

[0020] Preferably, the limiting spring is arranged between the two insertion plates on both sides of the connecting plate, the other end of each of the two insertion plates abuts against both sides of the rotating rod two, and the rotating rod two and the rotating rod one are symmetrically arranged inside both sides of the limiting sliding table.

[0021] By adopting the above technical solution, the limiting slide and the guide slide rod are vertically arranged through the connecting plate.

[0022] Preferably, the two transmission ropes of the swivel are respectively wound around the surfaces of the rotating rod 1 and the rotating rod 2, and the directions of the transmission ropes wound around the surfaces of the rotating rod 1 and the rotating rod 2 are opposite, and the rotating rod 1 and the rotating rod 2 are arranged perpendicular to the center line of the swivel.

[0023] By adopting the above technical solution, two transmission ropes arranged at both ends of the swivel provide position limiting for the rotation of the first and second rotating rods.

[0024] Preferably, the guide slide bar and the limit frame are arranged vertically in a "cross" shape, and a damping member is provided at the sliding connection between the guide slide bar and the load-bearing slide. A hedge trimmer is provided above the load-bearing slide, and both sides of the output end of the hedge trimmer are slidably connected to the second plug plate.

[0025] By adopting the above technical solution, the guide slide bar is located on one side of the limit frame to provide an adjustment environment for the working depth of the hedge trimmer.

[0026] Preferably, the second plug plate is configured to be C-shaped and connected to the protective plate, and the upper end of the protective plate is rotatably connected to a mounting plate, the mounting plate is connected to the upper end of the hedge trimmer, and a gap is left between the serrations at the output end of the hedge trimmer and the inner wall of the second plug plate.

[0027] By adopting the above technical solution, the second plug plate is wrapped around one side of the output end of the hedge trimmer, thereby preventing the saw teeth of the output end of the hedge trimmer from scratching the user.

[0028] Compared with the prior art, the present invention has the following beneficial effects: the portable garden hedge directional pruning work platform:

[0029] 1. When using the device, by turning the handle, the handle drives the rotating ring to rotate, so that the rotating rods 1 and 2 rotate synchronously, so that the rotating rods 1 and 2 push the plug plate 1, so that the plug plate 1 is stuck in the anti-slip slot, and the height of the guide slide bar is adjusted to adjust the working height of the hedge trimmer, so that the hedge trimmer maintains a stable height environment for garden hedge trimming, realizes one-time shaping during the hedge trimming process, and speeds up the trimming process;

[0030] 2. The limit frame and the guide slide bar cooperate to form a depth and height adjustment environment, so that the hedge trimmer can maintain a higher trimming flatness during the hedge trimming process. The support platform provides the steering direction for the limit frame to assist the hedge trimmer in its operation. The hedge trimmer can be adjusted at any time according to the height of the hedge on site during the hedge trimming process, thereby improving the flexibility of the device.

[0031] 3. The frame is formed by connecting rods arranged on the side wall of the support platform, and the lifting column and the steering wheel are used to form a portable displacement platform. The auxiliary rollers arranged on one side of the platform frame are convenient for keeping the platform aligned with the curbstones of the urban road, preventing the hedge trimmer from excessively entering the hedge, causing branches to be stuck inside the hedge trimmer, and improving the working efficiency of the hedge trimmer. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the overall internal front view structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the overall internal side structure of the present invention;

[0034] Figure 3 This is a schematic diagram of the overall external top view structure of the present invention;

[0035] Figure 4 This is a schematic diagram of the internal side structure of the limit slide of the present invention;

[0036] Figure 5 For the present invention Figure 1 A in the middle is an enlarged structural diagram;

[0037] Figure 6 For the present invention Figure 2 Enlarged structural diagram at point B in the middle.

[0038] In the figure: 1. Support platform; 2. Connecting rod; 3. Platform frame; 4. Auxiliary roller; 5. Lifting column; 6. Steering wheel; 7. Telescopic column; 8. Auxiliary frame; 9. Support frame; 10. Turntable; 11. Limit frame; 12. Anti-slip slot; 13. Mounting cover; 14. Limit slide; 15. Insert plate 1; 16. Limit spring; 17. Connecting plate; 18. Turn rod 1; 19. Swivel; 20. Handle; 21. Turn rod 2; 22. Guide slide; 23. Load slide; 24. Mounting plate; 25. Protective plate; 26. Insert plate 2; 27. Hedge trimmer. DETAILED DESCRIPTION

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

[0040] See also Figures 1-6The present invention provides a technical solution: a portable garden hedge directional pruning work platform, comprising a turntable 10 arranged at the upper end of a support platform 1 to provide guide support for the movable direction of a limit frame 11. When in use, a hedge trimmer 27 is installed on the upper end of a carrying slide 23, and the mounting plate 24 is rotated so that the mounting plate 24 clamps the upper end of the hedge trimmer 27. The serrated side of the output end of the hedge trimmer 27 is wrapped by a second plug plate 26 to prevent the hedge trimmer 27 from scratching the user's body when turning to the user's torso, while keeping the output end of the hedge trimmer 27 stable. By pushing the hedge trimmer 27, the carrying slide 23 slides inside the guide slide bar 22 to adjust the depth of entry into the garden hedge. By turning the handle 20, the swivel 19 is pushed. Rotate, the transmission ropes wound in two opposite directions are synchronously wound around the surface of the swivel 19, so that the rotating rod 18 and the rotating rod 21 rotate synchronously, so that the two plug plates 15 are synchronously inserted into the anti-slip slot 12, or retracted into the limit slide 14. The working height of the hedge trimmer 27 is adjusted before the serrated structure of the hedge trimmer 27 is installed according to the needs of use. The connecting rod 2 installed on the side wall of the support platform 1 provides a vertical bed environment for the platform frame 3, and the telescopic column 7 provides support for the auxiliary frame 8 and the support frame 9, so that the support frame 9 provides support for one end of the guide slide 22, providing the hedge trimmer 27 with different depths, heights and directions of operation requirements, and realizing the portable platform structure during the operation of the hedge trimmer 27;

[0041] In this embodiment, the support platform 1 is configured as a cylindrical platform structure, and the side wall of the support platform 1 is provided with four connecting rods 2 in an X shape, and one side of the three connecting rods 2 is connected to the side wall of the platform frame 3, and one side of the platform frame 3 is symmetrically rotatably connected to an auxiliary roller 4, and the inner part of the connection between the platform frame 3 and the connecting rod 2 is penetrated by a lifting column 5, and the bottom end of the lifting column 5 is rotatably connected to a direction wheel 6, and the top of the support platform 1 is provided with a bearing structure rotatably connected to the turntable 10, and the connecting rods 2 on both sides of the support platform 1 are arranged in parallel and symmetrically, and one end of the connecting rod 2 is penetrated by the lifting column 5, and four telescopic columns 7 are symmetrically and equidistantly provided on the upper end of the platform frame 3, and the tops of two telescopic columns 7 are connected to the auxiliary frame 8, and the tops of the other two telescopic columns 7 are docked with the support frame 9, the auxiliary frame 8 and the support frame 9 are arranged in a vertical direction, and the auxiliary frame 8 is arranged parallel to the upper side of the platform frame 3, and the support frame 9 and the other side of the platform frame 3 are symmetrically arranged with the center line of the support platform 1;

[0042] In some embodiments, as shown in Figures 1-3 of the specification, the connecting rod 2 provided on the side wall of the support platform 1 is connected to the platform frame 3. When in use, the connecting rod 2 is provided on the side wall of the support platform 1 in an X shape, as shown in FIG. Figure 3As shown, the lifting column 5 is provided at one end of the connecting rod 2 and is driven by electricity when in use, wherein the lifting column 5 is a rod structure with two-section sliding connection, so that the lifting column 5 adjusts the height between the platform frame 3 and the steering wheel 6, so that the auxiliary roller 4 is located on the side of the curbstone of the road, so that the frame formed by the support platform 1, the connecting rod 2 and the platform frame 3 provides support for the installation of the telescopic column 7, and simultaneously forms the bottom end of the working platform, and provides a movable structure for the overall displacement of the platform through the steering wheel 6. The telescopic column 7 is driven by electricity to rise and fall, so that the four telescopic columns 7 installed on one side of the two connecting rods 2 and the platform frame 3 provide support for the auxiliary frame 8 and the support frame 9, as shown in FIG. Figure 1 and Figure 2 As shown, the auxiliary frame 8, the support frame 9 and the platform frame 3 are vertically symmetrically installed. Figure 3 The U-shaped structure shown in FIG. 1 makes the auxiliary frame 8 and the support frame 9 provide support for the guide slide 22. Figure 1 As shown;

[0043] In some embodiments, a turntable 10 is rotatably connected to the top of the support platform 1, a limit frame 11 is provided above the turntable 10, and an anti-slip slot 12 is symmetrically provided on the inner wall of the limit frame 11, a mounting cover 13 is snap-fitted to the top opening of the limit frame 11, and a limit slide 14 is slidably connected inside the limit frame 11, and a plug-in plate 15 is symmetrically slidably connected inside the limit slide 14, and the limit frame 11 is provided with a U-shaped structure, and the anti-slip slot 12 provided on the inner wall of the limit frame 11 is snap-fitted to the outer wall of the plug-in plate 15 , one side of the two plug-in plates 15 is against the two sides of the rotating rod 18, and the inner wall of the limit slide 14 is provided with a connecting plate 17, and the connecting plate 17 is provided with a cylindrical protrusion at one end passing through one side of the limit slide 14, and the two sides of the connecting plate 17 are respectively against the side wall of one plug-in plate 15, and the two sides of the connecting plate 17 are provided with a limiting spring 16 between the two plug-in plates 15, and the other end of the two plug-in plates 15 is against the two sides of the rotating rod 21, and the rotating rod 21 and the rotating rod 18 are symmetrically rotated and arranged on both sides of the inner side of the limit slide 14;

[0044] In some embodiments, in combination with the figures 1-6 of the specification, the turntable 10 is located above the support table 1 and rotates on the bearing, so that the turntable 10 is further adjusted for the movable direction of the limit frame 11, and the anti-slip slot 12 provided inside the limit frame 11 is engaged with the plug-in plate 15 for limiting the position. The damping structure provided inside the anti-slip slot 12 makes the damping member inside the anti-slip slot 12 tightly connected with the frosted anti-slip surface on the surface of the plug-in plate 15 to prevent the limit slide 14 from falling off due to gravity. By symmetrically provided on the rotating rod 18 and the rotating rod 21 inside the limit slide 14, as shown Figure 1 and Figure 4As shown, by rotating the rotating rod 18 and the rotating rod 21, the protrusions on both sides push the two plug plates 15 to the outside of the limit slide 14, so that the limit spring 16 between the two plug plates 15 is opened, and the tension of the limit spring 16 makes the two plug plates 15 and the protrusion structures on both sides of the rotating rod 18 and the rotating rod 21 resist each other, so that the plug plate 15 is tightly pressed against the inside of the limit frame 11 and the anti-slip slot 12, keeping the limit slide 14 stably connected inside the limit frame 11, and installing the mounting cover 13 on the top of the limit frame 11 by bolts to prevent the limit slide 14 from falling off during the lifting process, and the connecting plate 17 arranged inside the limit slide 14 is connected to one side of the guide slide 22 by bolts, as shown in FIG. Figure 4 and Figure 2 As shown;

[0045] In some embodiments, the swivel 19 is rotatably connected to one side of the limit slide 14, the shaft of the swivel 19 is docked with one end of the handle 20, and two transmission ropes are symmetrically arranged inside the swivel 19. The limit slide 14 is penetrated by the connecting plate 17 on one side and is connected to the guide slide 22 by bolts, and the guide slide 22 is slidably connected to the load-bearing slide 23 inside. A protective plate 25 is vertically provided on the upper end of the load-bearing slide 23. The two transmission ropes of the swivel 19 are respectively wound around the surfaces of the rotating rod 18 and the rotating rod 21, and the directions of the transmission ropes wound around the surfaces of the rotating rod 18 and the rotating rod 21 are opposite. The rotating rod 18 is connected to the guide slide 22 on one side and is connected to the guide slide 22 on the other side. The second rotating rod 21 is arranged perpendicularly to the center line of the rotating ring 19, the guide slide 22 and the limit frame 11 are arranged perpendicularly in a "cross" shape, and a damping member is provided at the sliding connection between the guide slide 22 and the load-bearing slide 23. A hedge trimmer 27 is provided above the load-bearing slide 23, and both sides of the output end of the hedge trimmer 27 are slidably connected to the second plug plate 26. The second plug plate 26 is set in a C shape and is engaged with the protective plate 25. The upper end of the protective plate 25 is rotatably connected to the mounting plate 24. The mounting plate 24 is engaged with the upper end of the hedge trimmer 27, and a gap is left between the serrations at the output end of the hedge trimmer 27 and the inner wall surface of the second plug plate 26.

[0046] In some embodiments, as shown in Figures 1-6 of the specification, by rotating the handle 20, the handle 20 drives the swivel 19 located on the side outside the limit slide 14 to rotate. Since the two transmission ropes set on both sides of the swivel 19 are wound in opposite directions with the surfaces of the rotating rod 18 and the rotating rod 21, the swivel 19 rotates the rotating rod 18 and the rotating rod 21 synchronously, pushing the insert plate 15 into the anti-slip slot 12, as shown in FIG. Figure 2 and Figure 4As shown, the rotating rod 18 and the rotating rod 21 are located on one side of the limiting slide 14. By adding a spring structure arranged in a C shape, when the rotating rod 18 and the rotating rod 21 rotate through the transmission rope and the swivel 19, traction is provided for the reset of the rotating rod 18 and the rotating rod 21, so as to prevent the transmission rope on the surface of the rotating rod 18 and the rotating rod 21 from loosening and not resetting when the swivel 19 rotates and resets. The bearing slide 23 arranged inside the guide slide 22 facilitates the hedge trimmer 27 installed above the bearing slide 23 to enter the hedge for trimming. The protective plate 25 arranged on one side of the bearing slide 23 is engaged with the plug plate 26 and wrapped around the output end of the hedge trimmer 27. Figure 1 and Figure 3 As shown, to prevent the hedge trimmer 27 from accidentally injuring the user during the activity process, the mounting plate 24 provided above the protective plate 25 is wrapped above the main body of the hedge trimmer 27, as shown in FIG. Figures 1-3 As shown, a portable platform structure is provided for pruning work.

[0047] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A portable work platform for directional pruning of garden hedges, comprising a support platform (1), a turntable (10) and a swivel (19), characterized in that: A support platform (1) is provided with a cylindrical platform structure, wherein the side wall of the support platform (1) is provided with four connecting rods (2) in an X shape, and one side of the three connecting rods (2) is connected to the side wall of the platform frame (3), one side of the platform frame (3) is symmetrically connected to an auxiliary roller (4), and the interior of the platform frame (3) connected to the connecting rods (2) is penetrated by a lifting column (5), and the bottom end of the lifting column (5) is rotatably connected to a direction wheel (6); A turntable (10) is rotatably connected to the top of the support platform (1); a limit frame (11) is provided above the turntable (10); and an anti-slip slot (12) is symmetrically provided on the inner wall of the limit frame (11); an installation cover (13) is connected to the top opening of the limit frame (11); and a limit slide (14) is slidably connected inside the limit frame (11); and a plug-in plate (15) is symmetrically slidably connected inside the limit slide (14); the limit frame (11) is provided with a U-shaped structure, and the anti-slip slot (12) provided on the inner wall of the limit frame (11) is connected to the outer wall of the plug-in plate (15); the two One side of the insert plate (15) is against both sides of the rotating rod (18); the inner wall surface of the limit slide (14) is provided with a connecting plate (17), and the connecting plate (17) is provided with a cylindrical protrusion at one end which passes through one side of the limit slide (14), and the two sides of the connecting plate (17) are respectively against the side wall surface of one insert plate (15); the two sides of the connecting plate (17) are provided with limiting springs (16) between the two insert plates (15), and the other ends of the two insert plates (15) are against both sides of the rotating rod (21), and the rotating rod (21) and the rotating rod (18) are symmetrically rotated and arranged on both sides of the inner side of the limit slide (14); A swivel (19) is rotatably connected to one side of the limit slide (14), the shaft of the swivel (19) is butted against one end of the handle (20), and two transmission ropes are symmetrically arranged inside the swivel (19), the limit slide (14) is penetrated by the connecting plate (17) on one side and connected to the guide slide (22) by bolts, and the guide slide (22) is slidably connected to the bearing slide (23) inside, and a protective plate (25) is vertically arranged on the upper end of the bearing slide (23); the two transmission ropes of the swivel (19) are respectively wound around the surface of the rotating rod 1 (18) and the rotating rod 2 (21), and the directions of the transmission ropes wound around the surface of the rotating rod 1 (18) and the rotating rod 2 (21) are opposite, and the rotating rod 1 (18) and the rotating rod 2 (21) are opposite. The second rod (21) is arranged perpendicularly to the center line of the rotating ring (19); the guide slide bar (22) and the limit frame (11) are arranged perpendicularly in a "cross" shape, and a damping member is provided at the sliding connection between the guide slide bar (22) and the bearing slide (23); a hedge trimmer (27) is provided above the bearing slide (23), and both sides of the output end of the hedge trimmer (27) are slidably connected to the second plug plate (26); the second plug plate (26) is arranged in a C shape and is engaged with the protective plate (25), and the upper end of the protective plate (25) is rotatably connected to the mounting plate (24), the mounting plate (24) is engaged with the upper end of the hedge trimmer (27), and a gap is left between the saw teeth at the output end of the hedge trimmer (27) and the inner wall surface of the second plug plate (26).

2. A portable work platform for directional pruning of garden hedges according to claim 1, characterized in that: The top of the support platform (1) is provided with a bearing structure rotatably connected to the turntable (10), and the connecting rods (2) on both sides of the support platform (1) are arranged in parallel and symmetrically, and one end of the connecting rod (2) is penetrated by the lifting column (5).

3. The portable work platform for directional pruning of garden hedges according to claim 1, characterized in that: Four telescopic columns (7) are symmetrically and equidistantly arranged on the upper end of the platform frame (3), and the top ends of two telescopic columns (7) are connected to the auxiliary frame (8), and the top ends of the other two telescopic columns (7) are connected to the support frame (9).

4. The portable work platform for directional pruning of garden hedges according to claim 3, characterized in that: The auxiliary frame (8) and the support frame (9) are arranged in a vertical direction, and the auxiliary frame (8) is arranged parallel to the upper side of the platform frame (3), and the support frame (9) and the other side of the platform frame (3) are arranged symmetrically with respect to the center line of the support platform (1).

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