Novel mobile station ladder

Abstract

The invention provides a novel mobile platform ladder, and relates to the technical field of platform ladders, the novel mobile platform ladder comprises a frame rod, a plurality of cushion blocks are fixedly connected to the bottom end of the frame rod, anti-skid devices are arranged on the outer surfaces of two pedals, each anti-skid device comprises a rubber frame, a plurality of circular grooves are formed in the outer surfaces of the pedals, and the rubber frames are arranged in the circular grooves. A circular groove is formed in the surface of the pedal, a circular block is slidably connected to the inner wall of the circular groove, a plurality of protrusions are fixedly connected to the top end of the circular block, and a spring is arranged at the bottom end of the circular block. When the feet of a worker are located on the surfaces of the pedals, the round blocks, corresponding to the foot soles in shape, of the surfaces of the pedals are sunken, the positions of the feet on the surfaces of the pedals are further limited, the situation that the worker falls down and is injured when the worker steps on the surfaces of the pedals is avoided as much as possible, and the using safety of the step is improved.

Description

Technical Field

[0001] The invention relates to the technical field of steps and ladders, and in particular to a novel movable step and ladder. Background Art

[0002] When assembling and overhauling aircraft engines, workers need to use stairs to assist in climbing onto the engine so that they can stand on the top of the stairs to overhaul and assemble the engine. Stairs are usually divided into immovable wooden stairs and movable metal stairs. Movable metal stairs are more convenient to use.

[0003] Prior art such as the utility model patent with authorization announcement number CN204876402U relates to the technical field of movable stairs, specifically a movable staircase, including two or more steps; the step includes a step surface and a step side panel, the step side panel is provided with a fixed shaft perpendicular to it, two or more rollers are provided below the fixed shaft, the rollers are connected through a rotating shaft, a vertical rod is fixed on the rotating shaft, a pull rod hinged to it is provided on the vertical rod, a slot is provided on the pull rod, the fixed shaft passes through the slot, the slot can be used for the fixed shaft to slide, a stopper is provided at the end of the pull rod, and when the vertical rod is perpendicular to the ground, the bottom of the roller contacts the ground and is located below the step side panel. The beneficial effect of this patent application is that the movable step can be conveniently dragged by the pull rod, while preventing the palm of a person from being scratched by the thinner step surface, thereby ensuring the safety of the personnel.

[0004] When using a staircase, the maintenance personnel need to push the staircase to the aircraft engine assembly location and then climb to the top of the staircase. When climbing to the top through the steps of the staircase, the maintenance personnel's feet may slip, causing the maintenance personnel to lose balance and fall from the stairs, resulting in accidental injuries, resulting in the problem of low safety when using the staircase. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that when maintenance personnel climb to the top of the stairs, their feet may slip, causing them to lose balance and fall from the stairs, resulting in accidental injuries, resulting in low safety when using the stairs. A new type of mobile staircase is proposed to solve the problem that when maintenance personnel climb to the top of the stairs, their feet may slip, causing them to lose balance and fall from the stairs, resulting in accidental injuries,

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a new type of movable staircase comprises a frame rod, a plurality of pads are fixedly connected to the bottom end of the frame rod, and the pads are made of polyurethane material. One side of the bottom end of the frame rod is rotatably connected to two moving wheels, and one side of the frame rod is fixedly connected to two pedals, and the outer surfaces of the two pedals are provided with anti-skid devices. The anti-skid device comprises a rubber frame, the bottom end of the rubber frame is fixedly connected to the top end of the pedal, and the top end of the rubber frame is fixedly connected to a plurality of rubber convex strips, and the outer surface of the pedal is provided with a plurality of circular grooves, and the circular grooves are linearly distributed on the outer surface of the pedal, and the inner wall of the circular groove is slidably connected with a round block, and the top end of the round block is fixedly connected with a plurality of protrusions, and the protrusions are evenly distributed on the top end of the round block, and the bottom end of the round block is provided with a spring, and the upper and lower ends of the spring are respectively fixedly connected to the bottom end of the round block and the bottom end of the inner wall of the circular groove.

[0007] The effect achieved by the above components is: by setting the round block, when the operator uses the step ladder, he first lifts the end of the step ladder away from the moving wheel, pushes the rack rod to move to a position on the ground through the moving wheel, and after moving to the specified position, puts down one end of the rack rod to make the polyurethane pad at the bottom of the rack rod contact with the ground. Then the staff climbs onto the top of the rack rod through the pedal. When the staff's feet contact the edge of the pedal surface, the rubber convex strips and the rubber frame can increase the friction when the sole of the foot contacts the edge of the pedal, making it difficult for the staff to slip. When the staff's sole steps on When the several round blocks on the surface of the pedal are stepped on, the stepped round blocks will slide toward the bottom of the inner wall of the circular groove and compress the spring under the round blocks, so that the several round blocks on the surface of the pedal sink according to the shape of the soles of the staff members' feet, and the soles of the staff members' feet will be stuck between the non-sunken round blocks to prevent the soles of the staff members from slipping. At the same time, the several protrusions on the top of the round blocks can further increase the friction when the soles of the feet contact the surfaces of the round blocks. After the soles of the staff members' feet are lifted, the spring inside the circular groove will return to its original state and push the round blocks to slide upward on the inner wall of the circular groove to return the round blocks to their original positions.

[0008] Preferably, a round rod is fixedly connected to the bottom end of the round block, the inner diameter of the round rod is smaller than the inner diameter of the spring, and the outer surface of the round rod slides on the inner wall of the pedal.

[0009] The effects achieved by the above components are as follows: when the round block slides on the inner wall of the round groove, the round rod will slide on the inner wall of the pedal, further limiting the angle between the round block and the round groove, and avoiding as much as possible the angle deviation when the round block moves; at the same time, when the round block moves to deform the spring, the spring will move on the outside of the round rod, and the internal shape of the spring can be reinforced by the round rod, avoiding as much as possible the misalignment of outer surfaces of different heights when the spring is compressed, which affects the normal use of the spring.

[0010] Preferably, two positioning rods are fixedly connected to the bottom end of the inner wall of the circular groove, the inner wall of the circular block slides on the outer surface of the positioning rods, and the two positioning rods are respectively located on the left and right sides of the spring.

[0011] The effect achieved by the above components is that the round block will slide on the outer surface of the positioning rod when moving inside the circular groove. The positioning rod can reinforce the outer surface shape of the spring to avoid lateral distortion of the spring to affect normal use as much as possible.

[0012] Preferably, a stopper is fixedly connected to the outer surface of the round rod, and the diameter of the stopper is larger than the diameter of the round rod.

[0013] The effect achieved by the above components is that when the compressed spring returns to its original state and pushes the round block upward, the top of the block on the outer surface of the round rod will contact the bottom end of the pedal, thereby preventing the round block from moving too far upward and escaping from the round groove and being unable to return to the round groove normally.

[0014] Preferably, a convenient device is provided at one end of the rack rod, and the convenient device includes an insertion rod, the outer surface of the insertion rod is L-shaped, one end of the inner wall of the insertion rod is threadedly connected to a screw, the outer surface of the screw is threadedly connected to a T-shaped block, the outer surface of the T-shaped block slides on the inner wall of the insertion rod, one side of the T-shaped block is fixedly connected to a placement box, and a slot is opened on one side of the rack rod, and the size and shape of the inner wall of the slot are adapted to the size and shape of the outer surface of one end of the insertion rod.

[0015] The effect achieved by the above components is: when using the step ladder, after moving the step ladder to the specified position, the shorter end of the insertion rod can be inserted into the slot on the outer surface of the rack pole, the insertion rod can be fixed to one side of the rack pole, and the tools needed for assembling the aircraft engine can be placed in the placement box for easy storage. When a person stands on the top of the rack pole, the screw can be turned to control the T-shaped block to slide up and down on the outer surface of the screw and the inner wall of the insertion rod to adjust the height position of the T-shaped block and the placement box, which is convenient for taking out the tools from the inside of the placement box for use, further improving the convenience and flexibility when using the step ladder.

[0016] Preferably, one side of the placement box is rotatably connected to a plurality of rotating wheels, and the outer surface of the rotating wheels moves on one side of the insertion rod.

[0017] The effect achieved by the above components is: when the screw is rotated to control the T-shaped block to drive the placement box to move up and down, several rotating wheels on one side of the placement box will move on one side of the insertion rod, further limiting the angle between the placement box and the insertion rod, thereby improving the stability of the placement box when moving, and avoiding shaking of the placement box when moving as much as possible.

[0018] Preferably, a disc is fixedly connected to the top of the screw rod, and a grip rod is rotatably connected to the top of the disc.

[0019] The effect achieved by the above components is that by holding the outer surface of the handle and pushing the disc, the screw can be more conveniently controlled to rotate and adjust the height position of the placement box.

[0020] Preferably, one end of the insertion rod is fixedly connected to a magnetic block, and the inner wall of the slot is provided with an iron plate.

[0021] The effect achieved by the above components is: when one end of the insertion rod is fully inserted into the slot, the magnetic block at one end will contact and be magnetically attracted to the iron plate on the inner wall of the slot, further restricting the position of one end of the insertion rod inside the slot and improving the stability of the insertion rod when it is inserted into the slot.

[0022] Compared with the prior art, the advantages and positive effects of the present invention are: 1. In the present invention, by setting the round block, when the operator uses the step ladder, he first lifts the end of the step ladder away from the moving wheel, pushes the frame rod to move to the position on the ground through the moving wheel, and after moving to the specified position, puts down one end of the frame rod so that the polyurethane pad at the bottom of the frame rod contacts the ground. Then the staff climbs onto the top of the frame rod through the pedal. When the staff's feet contact the edge of the pedal surface, the rubber convex strips and the rubber frame can increase the friction when the sole of the foot contacts the edge of the pedal, so that the staff is not easy to slip. When the staff's sole steps on the pedal When the staff member's foot is lifted up, the spring inside the circular groove will return to its original shape and push the block to slide upward on the inner wall of the circular groove to restore the block to its original position.

[0023] 2. In the present invention, when the round block slides on the inner wall of the circular groove, the round rod will slide on the inner wall of the pedal, further limiting the angle between the round block and the circular groove, and avoiding the angle of the round block from being deflected when it moves as much as possible. At the same time, when the round block moves to deform the spring, the spring will move on the outside of the round rod. The internal shape of the spring can be reinforced by the round rod, and avoiding the outer surfaces of different heights from being misaligned when the spring is compressed, which affects the normal use of the spring.

[0024] 3. In the present invention, when the screw is rotated to control the T-shaped block to drive the placement box to move up and down, a number of rotating wheels on one side of the placement box will move on one side of the insertion rod, further limiting the angle between the placement box and the insertion rod, improving the stability of the placement box when moving, and avoiding shaking of the placement box when moving as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1A three-dimensional structural schematic diagram of a novel movable step ladder is provided for the present invention; Figure 2 A schematic diagram of the three-dimensional structure of a frame rod in a novel movable step ladder is provided for the present invention; Figure 3 A schematic diagram of the three-dimensional structure of a step in a novel movable step ladder is provided for the present invention; Figure 4 The present invention provides a partial cross-sectional three-dimensional structural schematic diagram of a step in a novel movable step ladder; Figure 5 The present invention provides a novel mobile step ladder Figure 3 A local enlarged three-dimensional structure schematic diagram; Figure 6 The present invention provides a novel mobile step ladder Figure 4 A schematic diagram of a partially enlarged three-dimensional structure at B; Figure 7 A schematic diagram of the three-dimensional structure of a rod insertion point in a novel movable step ladder is provided for the present invention; Figure 8 A schematic diagram of the three-dimensional structure of a screw rod in a novel movable step ladder is provided for the present invention; Fig. 9 The present invention provides a three-dimensional structural schematic diagram of a box placement location in a novel movable step ladder.

[0026] Legend: 1. Pole; 2. Anti-slip device; 3. Convenient device; 4. Pad; 5. Moving wheel; 6. Pedal; 21. Rubber frame; 22. Raised strip; 23. Round groove; 24. Round block; 25. Protrusion; 26. Spring; 27. Round rod; 28. Stopper; 29. ​​Positioning rod; 31. Slot; 32. Insert rod; 33. Screw; 34. T-block; 35. Placement box; 36. Rotating wheel; 37. Disc; 38. Grip; 39. Magnetic block. DETAILED DESCRIPTION

[0027] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Embodiment 1, as Figure 1-6 As shown, a novel movable step ladder comprises a frame rod 1, a plurality of cushion blocks 4 are fixedly connected to the bottom end of the frame rod 1, the cushion blocks 4 are made of polyurethane material, one side of the bottom end of the frame rod 1 is rotatably connected to two movable wheels 5, one side of the frame rod 1 is fixedly connected to two pedals 6, the outer surfaces of the two pedals 6 are provided with anti-skid devices 2, the anti-skid devices 2 comprise a rubber frame 21, the bottom end of the rubber frame 21 is fixedly connected to the top end of the pedal 6, the top end of the rubber frame 21 is fixedly connected to a plurality of rubber convex strips 22, the outer surface of the pedal 6 is provided with a plurality of circular grooves 23, the circular grooves 23 are linearly distributed on the outer surface of the pedal 6, the inner wall of the circular grooves 23 is slidably connected to a round block 24, the round block The top of the block 24 is fixedly connected with a plurality of protrusions 25, which are evenly distributed on the top of the round block 24. The bottom of the round block 24 is provided with a spring 26, and the upper and lower ends of the spring 26 are respectively fixedly connected with the bottom end of the round block 24 and the bottom end of the inner wall of the circular groove 23. By providing the round block 24, when the operator uses the step ladder, he first lifts the end of the step ladder away from the moving wheel 5, pushes the rack 1 to move to a position on the ground through the moving wheel 5, and after moving to the designated position, puts down one end of the rack rod 1, so that the polyurethane pad 4 at the bottom end of the rack rod 1 contacts the ground, and then the staff climbs onto the top of the rack rod 1 through the pedal 6, and the staff's feet are in contact with the edge of the surface of the pedal 6. When the worker's foot touches the pedal 6, the rubber convex strip 22 and the rubber frame 21 can increase the friction between the sole of the foot and the edge of the pedal 6, so that the worker is not likely to slip. When the worker's foot steps on the top of the several round blocks 24 on the surface of the pedal 6, the stepped round blocks 24 will slide toward the bottom end of the inner wall of the circular groove 23 and compress the spring 26 located below the round blocks 24, so that the several round blocks 24 on the surface of the pedal 6 sink according to the shape of the worker's foot, and the worker's foot part is stuck between the unsunk round blocks 24 to prevent the worker's foot from slipping. At the same time, the several protrusions 25 on the top of the round blocks 24 can further increase the friction between the sole of the foot and the surface of the round blocks 24. The force is applied, and after the worker's foot is lifted, the spring 26 inside the circular groove 23 will return to its original shape and push the round block 24 to slide upward on the inner wall of the circular groove 23 to restore the round block 24 to its original position. By providing the anti-skid device 2 and providing a rubber frame 21 on the surface of the pedal 6, it is possible to avoid slipping when the worker's foot steps on the edge of the pedal 6 surface, and make the round block 24 with a shape corresponding to the shape of the pedal 6 surface and the sole of the foot sink when the worker's foot is located on the pedal 6 surface, further restricting the position of the foot on the pedal 6 surface, and avoiding slipping when the worker's foot steps on the pedal 6 surface as much as possible, causing the person to fall and get injured, thereby improving the safety of the step ladder when used.

[0030] Example 2, based on specific example 1, Figure 2-6As shown, in this embodiment: the bottom end of the round block 24 is fixedly connected with a round rod 27, the inner diameter of the round rod 27 is smaller than the inner diameter of the spring 26, the outer surface of the round rod 27 slides on the inner wall of the pedal 6, and when the round block 24 slides on the inner wall of the circular groove 23, the round rod 27 will slide on the inner wall of the pedal 6, further limiting the angle between the round block 24 and the circular groove 23, and avoiding the angle of the round block 24 from being deflected when the round block 24 moves as much as possible. At the same time, when the round block 24 moves to deform the spring 26, the spring 26 will move on the outside of the round rod 27, and the inner surface of the spring 26 can be adjusted by the round rod 27. The shape of the spring 26 is reinforced to avoid as much as possible the misalignment of the outer surfaces at different heights when the spring 26 is compressed, which may affect the normal use of the spring 26. Two positioning rods 29 are fixedly connected to the bottom end of the inner wall of the circular groove 23. The inner wall of the round block 24 slides on the outer surface of the positioning rod 29. The two positioning rods 29 are respectively located on the left and right sides of the spring 26. When the round block 24 moves inside the circular groove 23, it will slide on the outer surface of the positioning rod 29. The outer surface shape of the spring 26 can be reinforced by the positioning rod 29 to avoid as much as possible the lateral distortion of the spring 26 that affects the normal use.

[0031] Reference Figure 2-6 As shown, in this embodiment: a stopper 28 is fixedly connected to the outer surface of the round rod 27, and the diameter of the stopper 28 is larger than the diameter of the round rod 27. When the compressed spring 26 returns to its original state and pushes the round block 24 to move upward, the top of the stopper 28 on the outer surface of the round rod 27 will contact the bottom end of the pedal 6, thereby preventing the round block 24 from moving upward too far and escaping from the circular groove 23 and unable to return to the circular groove 23 normally.

[0032] Reference Figure 1 , Figure 2 , Figure 7 , Figure 8 and Fig. 9As shown, in this embodiment: a convenient device 3 is provided at one end of the rack rod 1, and the convenient device 3 includes an insertion rod 32, the outer surface of the insertion rod 32 is L-shaped, and one end of the inner wall of the insertion rod 32 is threadedly connected with a screw 33, and the outer surface of the screw 33 is threadedly connected with a T-shaped block 34, and the outer surface of the T-shaped block 34 slides on the inner wall of the insertion rod 32, and a placement box 35 is fixedly connected to one side of the T-shaped block 34. A slot 31 is opened on one side of the rack rod 1, and the size and shape of the inner wall of the slot 31 are adapted to the size and shape of the outer surface of one end of the insertion rod 32. When the step ladder is used, the step ladder is moved After reaching the designated position, the shorter end of the insertion rod 32 can be inserted into the slot 31 on the outer surface of the rack rod 1, the insertion rod 32 can be fixed to one side of the rack rod 1, and the tools needed for assembling the aircraft engine can be placed in the placement box 35 for easy storage. When a person stands at the top of the rack rod 1, the screw rod 33 can be turned to control the T-shaped block 34 to slide up and down on the outer surface of the screw rod 33 and the inner wall of the insertion rod 32 to adjust the height position of the T-shaped block 34 and the placement box 35, so as to facilitate taking out the tools from the placement box 35 for use, thereby further improving the convenience and flexibility when using the step ladder.

[0033] Reference Figure 7-9 As shown, in the present embodiment: one side of the placement box 35 is rotatably connected to a plurality of rotating wheels 36, and the outer surface of the rotating wheel 36 moves on one side of the insertion rod 32. When the screw 33 is rotated to control the T-shaped block 34 to drive the placement box 35 to move up and down, the plurality of rotating wheels 36 on one side of the placement box 35 will move on one side of the insertion rod 32, further limiting the angle between the placement box 35 and the insertion rod 32, thereby improving the stability of the placement box 35 when moving, and avoiding shaking of the placement box 35 when moving as much as possible.

[0034] Reference Figure 7-9 As shown, in the present embodiment: the top end of the screw rod 33 is fixedly connected with a disc 37, and the top end of the disc 37 is rotatably connected with a grip rod 38. By holding the outer surface of the grip rod 38 and pushing the disc 37, it is more convenient to control the rotation of the screw rod 33 to adjust the height position of the placement box 35. One end of the insertion rod 32 is fixedly connected with a magnet 39, and the inner wall of the slot 31 is provided with an iron plate. When one end of the insertion rod 32 is fully inserted into the slot 31, the magnet 39 at one end will contact with the iron plate on the inner wall of the slot 31 and be magnetically attracted, which further limits the position of one end of the insertion rod 32 in the slot 31 and improves the stability of the insertion rod 32 when it is inserted into the slot 31.

[0035] Working principle: When using the step ladder to assemble the aircraft engine, first lift the end of the step ladder away from the moving wheel 5, push the rack 1 to move to the position on the ground through the moving wheel 5, and after moving to the specified position, put down one end of the rack 1 so that the polyurethane pad 4 at the bottom of the rack 1 contacts the ground, and then after moving the step ladder to the specified position, the shorter end of the insertion rod 32 can be inserted into the slot 31 on the outer surface of the rack 1, and the insertion rod 32 can be fixed to one side of the rack 1. The tools needed for assembling the aircraft engine are placed in the placement box 35 for easy storage, and the staff climbs to the top of the rack 1 through the pedal 6. When the staff's feet come into contact with the edge of the pedal 6 surface, the rubber convex strip 22 and the rubber frame 21 can increase the friction when the sole of the foot contacts the edge of the pedal 6, making it difficult for the staff to slip. When the sole of the staff steps on the several round blocks on the surface of the pedal 6 When the staff member's foot is lifted up, the spring 26 inside the circular groove 23 will return to its original state and push the round block 24 to slide upward on the inner wall of the circular groove 23 to restore the round block 24 to its original position. After climbing onto the top of the rack rod 1, the screw rod 33 can be rotated to control the T-shaped block 34 to slide up and down on the outer surface of the screw rod 33 and the inner wall of the insertion rod 32 to adjust the height position of the T-shaped block 34 and the placement box 35, so as to facilitate taking out the tool from the placement box 35 for use.

[0036] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A new type of mobile step ladder, characterized by: The invention comprises a frame rod (1), the bottom end of the frame rod (1) is fixedly connected to a plurality of cushion blocks (4), the cushion blocks (4) are made of polyurethane material, one side of the bottom end of the frame rod (1) is rotatably connected to two moving wheels (5), one side of the frame rod (1) is fixedly connected to two pedals (6), the outer surfaces of the two pedals (6) are provided with anti-skid devices (2), the anti-skid devices (2) comprise a rubber frame (21), the bottom end of the rubber frame (21) is fixedly connected to the top of the pedal (6), the top of the rubber frame (21) is fixedly connected to a plurality of rubber convex strips (22), the outer surface of the pedal (6) is provided with a plurality of circular grooves (23), the circular grooves (23) are linearly distributed on the outer surface of the pedal (6), the inner wall of the circular groove (23) is slidably connected to a circular block (24), the top of the circular block (24) is fixedly connected to a plurality of protrusions (25).

2. A novel movable step ladder according to claim 1, characterized in that: The protrusions (25) are evenly distributed on the top of the round block (24), and a spring (26) is provided at the bottom of the round block (24). The upper and lower ends of the spring (26) are respectively fixedly connected to the bottom of the round block (24) and the bottom of the inner wall of the circular groove (23).

3. A novel movable step ladder according to claim 2, characterized in that: A round rod (27) is fixedly connected to the bottom end of the round block (24); the inner diameter of the round rod (27) is smaller than the inner diameter of the spring (26); and the outer surface of the round rod (27) slides on the inner wall of the pedal (6).

4. A novel movable step ladder according to claim 3, characterized in that: Two positioning rods (29) are fixedly connected to the bottom end of the inner wall of the circular groove (23), and the inner wall of the circular block (24) slides on the outer surface of the positioning rods (29). The two positioning rods (29) are respectively located on the left and right sides of the spring (26).

5. A novel movable step ladder according to claim 4, characterized in that: A stopper (28) is fixedly connected to the outer surface of the round rod (27), and the diameter of the stopper (28) is larger than the diameter of the round rod (27).

6. A novel movable step ladder according to claim 5, characterized in that: A convenient device (3) is provided at one end of the rack rod (1), the convenient device (3) comprising an insertion rod (32), the outer surface of the insertion rod (32) being L-shaped, one end of the inner wall of the insertion rod (32) being threadedly connected to a screw rod (33), and the outer surface of the screw rod (33) being threadedly connected to a T-shaped block (34).

7. A novel movable step ladder according to claim 6, characterized in that: The outer surface of the T-shaped block (34) slides on the inner wall of the insertion rod (32), and a placement box (35) is fixedly connected to one side of the T-shaped block (34).

8. A novel movable step ladder according to claim 7, characterized in that: A slot (31) is provided on one side of the rack rod (1), and the size and shape of the inner wall of the slot (31) are matched to the size and shape of the outer surface of one end of the insertion rod (32).

9. A novel movable step ladder according to claim 8, characterized in that: One side of the placement box (35) is rotatably connected to a plurality of rotating wheels (36), and the outer surface of the rotating wheels (36) moves on one side of the insertion rod (32).

10. A novel movable step ladder according to claim 9, characterized in that: The top end of the screw rod (33) is fixedly connected to a disc (37), the top end of the disc (37) is rotatably connected to a grip rod (38), one end of the insertion rod (32) is fixedly connected to a magnetic block (39), and the inner wall of the slot (31) is provided with an iron plate.

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