Movable climbing ladder

Abstract

The utility model relates to a movable climbing ladder, which belongs to the field of climbing ladders and comprises two protective fences, and each protective fence comprises a horizontal rod and a vertical rod. A climbing ladder structure is arranged between the two protective fences, the climbing ladder structure comprises a first transverse shaft, a second transverse shaft and two groups of connecting rods, and each group of connecting rods comprises a long rod and a short rod; a first step plate is jointly fixed on the first transverse shaft and the second transverse shaft; a plurality of step assemblies are arranged between the two groups of connecting rods, and are respectively marked as a second step assembly, a third step assembly,..., and an Nth step assembly from bottom to top; any step assembly comprises a third transverse shaft and a fourth transverse shaft; a second step plate is fixed on the third transverse shaft and the fourth transverse shaft; the quadrangles ABCD are parallelograms by setting the point where the first horizontal axis is located as a point A, the point where the second horizontal axis is located as a point B, the point where the third horizontal axis is located as a point D and the point where the fourth horizontal axis 11 is located as a point C; a lifting assembly is further included. The height of the climbing ladder can be changed, and the climbing ladder adapts to goods taking points with different heights.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of climbing ladders, and particularly relates to a movable climbing ladder. BACKGROUND

[0002] Goods in a warehouse are usually placed at a high position of a goods cabinet, and the height of a person is often not enough when the person takes the goods. Therefore, a climbing ladder needs to be used to help the person to climb to a certain height.

[0003] The existing climbing ladder usually does not have a height adjusting function. The existing climbing ladder comprises a protective fence, a plurality of climbing boards, a working platform, moving wheels and a support frame. The climbing boards are fixed on the protective fence in a ladder shape. The working platform is located above the climbing boards and is fixed on the protective fence. An operator can climb the working platform by passing through the climbing boards one by one. The moving wheels and support feet are installed at the bottom of the protective fence. When the support feet and the moving wheels are placed on the ground, the climbing ladder cannot be moved. When the support feet are lifted from the ground, the climbing ladder can be moved and replaced by the moving wheels.

[0004] When the existing climbing ladder is used, the height of the working platform cannot be adjusted because all the climbing boards and the working platform are fixed on the protective fence. When a user climbs to the working platform of the climbing ladder to take goods, the goods may be located at a low position of the user's body, such as a position below the user's waist. As a result, the user has to bend down to take the goods. In order to make the goods located at a suitable height of the user as much as possible, it is necessary to design a climbing ladder with a working platform that can adjust the height. CONTENT OF THE UTILITY MODEL

[0005] The movable climbing ladder can be adjusted to a high position, so that goods are located at a height suitable for the user to take.

[0006] The movable climbing ladder comprises two protective fences. The two protective fences are arranged side by side along an X direction. The protective fence comprises a horizontal rod and a vertical rod which are fixed to each other. A climbing ladder structure is arranged between the two protective fences. The climbing ladder structure comprises:

[0007] A first horizontal shaft and a second horizontal shaft are arranged side by side along a Y direction. The two ends of the first horizontal shaft and the second horizontal shaft are fixed to the horizontal rods of the two protective fences, respectively. The first horizontal shaft and the second horizontal shaft are arranged side by side along the Y direction. When viewed from a top view, the Y direction is perpendicular to the X direction.

[0008] Two groups of connecting rods, each group of connecting rods including a long rod and a short rod; the two groups of connecting rods are arranged side by side along the X direction; the lower end of the long rod is sleeved on the first horizontal shaft, and the long rod can rotate relative to the first horizontal shaft about the axis of the first horizontal shaft, the axis of the first horizontal shaft being arranged along the radial direction of the long rod; the lower end of the short rod is sleeved on the second horizontal shaft, and the short rod can rotate relative to the second horizontal shaft about the axis of the second horizontal shaft, the axis of the second horizontal shaft being arranged along the radial direction of the short rod; the first horizontal shaft and the second horizontal shaft are commonly fixed with a first step plate; the first horizontal shaft, the second horizontal shaft and the first step plate form a first step assembly; a plurality of step assemblies are further arranged between the two groups of connecting rods, and are sequentially recorded as a second step assembly, a third step assembly,..., and an Nth step assembly from bottom to top; the first step assembly, the second step assembly,..., and the Nth step assembly are arranged in a stepped manner;

[0009] The second step assembly, the third step assembly,..., and the Nth step assembly are the same in structure, and any one of the second step assembly, the third step assembly,..., and the Nth step assembly includes:

[0010] A third horizontal shaft with an axis along the X direction is arranged through the two long rods, and the long rods can rotate relative to the third horizontal shaft about the axis of the third horizontal shaft;

[0011] A fourth horizontal shaft with an axis along the X direction is arranged through the two short rods, and the short rods can rotate relative to the fourth horizontal shaft about the axis of the fourth horizontal shaft; the third horizontal shaft and the fourth horizontal shaft are commonly fixed with a second step plate;

[0012] When viewed in the X direction, a point where the first horizontal shaft is located is point A, a point where the second horizontal shaft is located is point B, a point where the third horizontal shaft of any one of the step assemblies other than the first step assembly is located is point D, and a point where the fourth horizontal shaft is located is point C; then the quadrilateral ABCD is a parallelogram;

[0013] The lifting assembly is further used to rotate the long rod relative to the first horizontal shaft about the axis of the first horizontal shaft.

[0014] The climbing ladder can realize corresponding linkage of each step assembly by rotating the long rod relative to the first horizontal shaft about the axis of the first horizontal shaft, so that the height of each step assembly changes, and the height of the working step in the lifting assembly also changes due to the rotation of the long rod, so that a user standing on the working step can adaptively change the height difference between the user and the pickup point according to the change in height, so that the pickup point is located at a suitable height of the user, and the user can easily pick up the goods.

[0015] Further, the lifting assembly includes:

[0016] Two vertical rods are respectively fixed on the two horizontal rods, and the axis of the vertical rod is arranged along the vertical direction; a strip-shaped hole is formed in each of the two vertical rods and the two vertical rods;

[0017] The working frame is movably clamped on the corresponding vertical rod and vertical rod through the strip-shaped hole, and the working frame can move vertically along the strip-shaped hole relative to the vertical rod and vertical rod;

[0018] The two edges of the working bench in the Y direction are respectively rod one and rod two, and the working bench is fixed on the rod one and rod two; the working bench, the rod one and the rod two jointly constitute the N+1 bench assembly, and the N+1 bench assembly and the N bench assembly are arranged in a stepped manner;

[0019] The two ends of the working bench in the X direction are respectively provided with a sliding groove, and the length direction of the sliding groove is along the Y direction;

[0020] The upper end of the two long rods is fixed with a sliding rod, the axis of the sliding rod is along the X direction, the end of the sliding rod away from the long rod is in the corresponding sliding groove, the sliding rod can move along the Y direction relative to the sliding groove, and the sliding rod can also rotate relative to the sliding groove around the axis thereof;

[0021] The non-extendable end of the electric push rod is fixed on the horizontal rod, and the extendable end is vertically arranged; the extendable end of the electric push rod is fixed with a connecting rod, the connecting rod is vertically arranged, and the upper end of the connecting rod is fixed with the working frame.

[0022] The sliding groove and the working bench are used as a whole lifting, the long rod is rotated around the axis of the first horizontal shaft relative to the first horizontal shaft through the linkage of the sliding groove and the sliding rod, so that the whole climbing ladder structure linkage is realized, and the height of the working bench and other bench assemblies is adjusted.

[0023] Further, any one of the second bench assembly, the third bench assembly, …, the N bench assembly is observed, the third horizontal shaft and the fourth rotating shaft of the bench assembly pass through the long rod and the short rod correspondingly, and the long rod and the short rod are provided with holes for the third horizontal shaft and the fourth rotating shaft to pass through; the third horizontal shaft and the fourth rotating shaft of the bench assembly are fixed with clamping blocks at both ends, the two long rods are located between the two clamping blocks at both ends of the third horizontal shaft, the two short rods are located between the two clamping blocks at both ends of the fourth horizontal shaft, and the size of the clamping block is greater than the hole diameter of the hole for the third horizontal shaft and the fourth rotating shaft to pass through on the long rod and the short rod.

[0024] The clamping block increases the connection stability of the third horizontal shaft, the fourth horizontal shaft, the long rod and the short rod. If there is no clamping block, the third horizontal shaft or the fourth horizontal shaft is easy to fall off from the long rod or the short rod, and the connection of the structure will be weakened.

[0025] Further, the horizontal rod of the guardrail is provided with a universal wheel and a supporting leg at the lower end.

[0026] The universal wheel can assist the movement of the whole climbing ladder, and when the whole device is used, the universal wheel and the supporting leg can be placed on the ground at the same time to increase the friction, so as to prevent the whole device from moving randomly.

[0027] Further, the guardrail further comprises a device rod, two ends of the device rod are fixed with the vertical rod and the horizontal rod respectively, and a lifting rod is fixed on the device rod.

[0028] The device rod can be used as a force point for lifting the supporting legs from the ground, only allowing the universal wheels to contact the ground, and only relying on the rolling of the universal wheels to move the whole device.

[0029] Beneficial effects:

[0030] The height of the whole climbing ladder structure is adjusted by rotating the long rod and the short rod around the axis of the first horizontal shaft and the second horizontal shaft respectively, and rotating the third horizontal shaft and the fourth horizontal shaft of each step assembly relative to the long rod and the short rod respectively. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a schematic view of the overall structure of the front of the climbing ladder;

[0032] Figure 2 is a schematic view of the overall structure of the back of the climbing ladder.

[0033] 1, horizontal rod; 2, vertical rod; 3, universal wheel; 4, supporting leg; 5, long rod; 6, short rod; 7, first horizontal shaft; 8, second horizontal shaft; 9, first step plate; 10, third horizontal shaft; 11, fourth horizontal shaft; 12, second step plate; 13, vertical rod; 14, slot; 15, rod one; 16, rod two; 17, working step; 18, sliding groove; 19, sliding rod; 20, electric push rod; 21, connecting rod; 22, device rod; 23, lifting rod. DETAILED DESCRIPTION

[0034] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] See Figure 1 and Figure 2 The movable climbing ladder comprises two guardrails, and the two guardrails are arranged side by side along the X direction.

[0036] With a guardrail, the guardrail comprises: horizontal rods 1 and vertical rods 2 fixed by welding, the axis of the vertical rod 2 is vertically arranged, and the axis of the horizontal rod 1 is horizontally arranged. A universal wheel 3 is installed at the bottom of each horizontal rod 1 of the guardrail, the universal wheel 3 can rotate universally, and the universal wheel 3 belongs to the prior art and will not be described again; a supporting leg 4 is also fixed by welding at the bottom of each horizontal rod 1 of the guardrail, the universal wheel 3 and the supporting leg 4 are arranged at both ends of the horizontal rod 1 respectively, the supporting leg 4 and the universal wheel 3 are placed on the ground at the same time during normal use of the ladder, the axis of the horizontal rod 1 is along the Y direction, and the X direction is perpendicular to the Y direction in the top view.

[0037] A climbing ladder structure is arranged between the two guardrails, and the climbing ladder structure comprises:

[0038] Two groups of connecting rods are arranged side by side along the X direction. With one group of connecting rods, the group of connecting rods comprises a long rod 5 and a short rod 6.

[0039] First and second cross shafts 7 and 8 are arranged between the horizontal rods 1 of the two guardrails, the first and second cross shafts 7 and 8 are arranged side by side along the Y direction, and the axes of the first and second cross shafts 7 and 8 are along the X direction. The two ends of the first and second cross shafts 7 and 8 are respectively fixed by welding on the horizontal rods 1 of the two guardrails.

[0040] The two groups of connecting rods are respectively connected to the two ends of the first and second cross shafts 7 and 8. Specifically, with one group of connecting rods, the lower end of the long rod 5 in the group of connecting rods is sleeved on the corresponding end of the first cross shaft 7, a hole is formed in the long rod 5 for the first cross shaft 7 to pass through, the long rod 5 can rotate relative to the first cross shaft 7 about the axis of the first cross shaft 7, and the axis of the first cross shaft 7 is arranged along the radial direction of the long rod 5; similarly, the lower end of the short rod 6 is sleeved on the corresponding end of the second cross shaft 8, a hole is formed in the short rod 6 for the second cross shaft 8 to pass through, the short rod 6 can rotate relative to the second cross shaft 8 about the axis of the second cross shaft 8, and the axis of the second cross shaft 8 is arranged along the radial direction of the short rod 6; in the X direction, the axis of the long rod 5 is parallel to the axis of the short rod 6.

[0041] A first step plate 9 is fixed by welding on the peripheral wall of the first and second cross shafts 7 and 8, the first step plate 9 is horizontally arranged, and the first cross shaft 7, the second cross shaft 8 and the first step plate 9 jointly form a first step assembly. A plurality of step assemblies are arranged between the two groups of connecting rods, and are respectively denoted as a second step assembly, a third step assembly, …, and an Nth step assembly from bottom to top. In the X direction, the first step assembly, the second step assembly, the third step assembly, …, and the Nth step assembly are arranged in a stepped manner.

[0042] The second step assembly, the third step assembly, the Nth step assembly have the same structure, and the connection modes of each group of connecting rods are also the same. Taking one of the step assemblies as an example, the step assembly comprises:

[0043] The third horizontal shaft 10 has an axis along the X direction and is arranged through the two long rods 5. The two long rods 5 can rotate relative to the third horizontal shaft 10 about the axis of the third horizontal shaft 10. The two ends of the third horizontal shaft 10 pass through the two long rods 5 respectively. The long rods 5 are provided with holes through which the third horizontal shaft 10 passes. The two ends of the third horizontal shaft 10 are welded with clamping blocks. The two long rods 5 are located between the two clamping blocks at the two ends of the third horizontal shaft 10. The sizes of the clamping blocks at the two ends of the third horizontal shaft 10 are greater than the diameters of the holes in the long rods 5. The two clamping blocks at the two ends of the third horizontal shaft 10 can prevent the third horizontal shaft 10 from falling off the two long rods 5.

[0044] The fourth horizontal shaft 11 has an axis along the X direction and is arranged through the two short rods 6. The two short rods 6 can rotate relative to the fourth horizontal shaft 11 about the axis of the fourth horizontal shaft 11. Similarly, the two ends of the fourth horizontal shaft 11 pass through the two short rods 6 respectively. The short rods 6 are provided with holes through which the fourth horizontal shaft 11 passes. The two ends of the fourth horizontal shaft 11 are also welded with clamping blocks. The two short rods 6 are located between the two clamping blocks at the two ends of the fourth horizontal shaft 11. The sizes of the clamping blocks at the two ends of the fourth horizontal shaft 11 are greater than the diameters of the holes in the short rods 6. The two clamping blocks at the two ends of the fourth horizontal shaft 11 can prevent the fourth horizontal shaft 11 from falling off the two short rods 6.

[0045] In the X direction, the point where the first horizontal shaft 7 is located is point A, the point where the second horizontal shaft 8 is located is point B, the point where the third horizontal shaft 10 of any one of the step assemblies other than the first step assembly is located is point D, and the point where the fourth horizontal shaft 11 is located is point C. Then the quadrilateral ABCD is a parallelogram. The third horizontal shaft 10 and the fourth horizontal shaft 11 are commonly welded and fixed with the second step plate 12. The second step plate 12 is horizontally arranged.

[0046] The first step assembly, the second step assembly, the third step assembly, …, the Nth step assembly are arranged in a stepped manner. In the X direction, the first step plate 9, the second step plate 12 of the second step assembly, the second step plate 12 of the third step assembly, …, the second step plate 12 of the Nth step assembly are arranged in a stepped manner.

[0047] The lifting assembly also comprises:

[0048] Two vertical rods 13 are respectively welded and fixed on the horizontal rods 1 of the two guardrails. The axes of the vertical rods 13 are arranged along the vertical direction. The two vertical rods 13 are arranged side by side along the X direction. In the top view, the points where the vertical rods 2 of the two guardrails are located are respectively point M and point N. The points where the two vertical rods 13 are located are respectively point O and point P. Then the quadrilateral MNOP is a rectangle.

[0049] Two vertical rods 13 and two vertical rods 2 are provided with strip-shaped holes 14, the length direction of the strip-shaped holes 14 is vertically arranged, and any one strip-shaped hole 14 penetrates the corresponding vertical rod 13 or vertical rod 2 along the X direction.

[0050] It also includes a working frame, and in this embodiment, the working frame is a rectangular frame. Two opposite edges of the working frame along the Y direction are respectively rod one 15 and rod two 16, wherein the axis of rod one 15 is along the X direction, and rod one 15 simultaneously penetrates the strip-shaped holes 14 of the two vertical rods 2; similarly, the axis of rod two 16 is along the X direction, and rod two 16 simultaneously penetrates the strip-shaped holes 14 of the two vertical rods 13. The working frame can vertically slide along the four strip-shaped holes 14, and the plane where the working frame is located is a horizontal plane. Rod one 15 and rod two 16 are commonly welded and fixed with a working step 17, which is horizontally arranged and is a rectangular plate. The working step, rod one and rod two commonly constitute an N+1 step assembly, which is above the N step assembly, and the N+1 step assembly is distributed in a stepped manner with the aforementioned N step assembly, and the upper ends of the two long rods 5 are respectively located on both sides of the working step 17 in the X direction.

[0051] The two ends of the working step 17 in the X direction are respectively provided with a sliding groove 18, the length direction of the sliding groove 18 is along the Y direction, and the sliding groove 18 is a rectangular groove. The upper end side walls of the two long rods 5 are respectively welded and fixed with a sliding rod 19, which is a circular rod, and the axis of the sliding rod 19 is along the X direction, i.e. along the radial direction of the long rod 5. The end of the sliding rod 19 away from the long rod 5 is in the corresponding sliding groove 18, and the sliding rod 19 can move along the Y direction relative to the sliding groove 18, and at the same time, the long rod 5 and the sliding rod 19 can rotate as a whole around the axis of the first horizontal shaft 7 relative to the first horizontal shaft 7, and in this rotating process, the sliding rod 19 can also adaptively rotate around its own axis relative to the sliding groove 18.

[0052] An electric push rod 20 is welded and fixed at the non-extendable end on the corresponding horizontal rod 1, the axis of the extendable end of the electric push rod 20 is vertically arranged, a connecting rod 21 is welded and fixed on the extendable end of the electric push rod 20, the axis of the connecting rod 21 is vertically arranged, and the upper end of the connecting rod 21 is welded and fixed with the working frame. The model of the electric push rod 20 can be YMD-601P, the maximum thrust of a single electric push rod 20 is 2000N, which can meet the purpose of supporting the weight of 2-3 people. In other embodiments, two electric push rods 20 are provided, and the two electric push rods 20 are respectively connected on both sides of the working frame in the Y direction through the connecting rod 21, so as to make the stress of the working frame more uniform.

[0053] The protective fence further comprises device rods 22, which are in no limited shape, and one end of each device rod 22 is welded and fixed to the vertical rod 2, and the other end is welded and fixed to the horizontal rod 1. A lifting rod 23 is welded to each of the two device rods 22, and the axis of the lifting rod 23 is along the Y direction. An operator can use the lifting rod 23 to lift the two support legs 4 off the ground, and only make the two universal wheels 3 contact the ground, so that the entire ladder stand can be conveniently shifted by relying on the universal wheels 3.

[0054] The use mode of the ladder stand:

[0055] The user lifts the two support legs 4 of the ladder stand off the ground through the lifting rod, and then pushes the ladder stand to the position where goods are to be taken, relying on the two universal wheels to contact and roll on the ground.

[0056] After reaching the position where goods are to be taken, the user releases the lifting rod, and makes the support legs 4 and the universal wheels contact the ground again. Then, the user observes the position height of the working steps 17 and the taking point. If the height of the working steps 17 is not appropriate, the height of the working steps 17 needs to be adjusted appropriately. The height adjustment of the working steps 17 is determined by the experience of the user, so as to ensure that the user reduces the degree of bending when taking goods at the taking point, and can take goods more easily.

[0057] The height adjustment and the height reduction of the working steps 17 are opposite, so only the height adjustment of the working steps 17 is exemplified.

[0058] The user powers on to make the electric push rod rise. The electric push rod uses a direct current power supply, and the ladder stand has a power supply for supplying power to the electric push rod, and the power supply can be charged. The electric push rod makes the connecting rod 21, the working frame, and the working steps 17 as a whole move upward along the strip-shaped hole. Because the sliding rod 19 is in the sliding groove 18, the aforementioned upward movement of the whole causes the sliding rod 19 to move along the Y direction relative to the sliding groove 18, and the sliding rod 19 and the long rod 5 also rotate as a whole around the axis of the first horizontal shaft 7. In the X direction, because the A point and the B point where the first horizontal shaft 7 and the second horizontal shaft 8 are located, and the C point and the D point where the third horizontal shaft and the fourth horizontal shaft in each step assembly are located form a parallelogram, the rotation of the long rod 5 causes the short rod 6 to also rotate around the axis of the second horizontal shaft 8. Thus, all the step assemblies are linked in the above-mentioned manner, so as to ensure that the user can step on the working steps 17 from each step assembly. At this time, the height adjustment of the working steps 17 is satisfied.

[0059] The present scheme changes the height of the working steps 17, so that the height of the taking point is more adaptable to the height of the working steps 17. When the user takes goods, the user can avoid excessive bending or excessive foot padding as much as possible, so that the convenience of the user in taking goods is improved.

[0060] With the above ideal embodiment of the present application as the inspiration, through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A mobile climbing ladder, characterized in that The two guardrails are arranged side by side along the X direction, and each guardrail comprises a horizontal rod (1) and a vertical rod (2) fixedly welded with each other. The first horizontal shaft (7) and the second horizontal shaft (8) are arranged side by side along the Y direction, and the Y direction is perpendicular to the X direction when viewed from the top. Each group of connecting rods comprises a long rod (5) and a short rod (6), and the two groups of connecting rods are arranged side by side along the X direction. The lower end of the long rod (5) is sleeved on the first horizontal shaft (7), and the long rod (5) can rotate relative to the first horizontal shaft (7) about the axis of the first horizontal shaft (7), and the axis of the first horizontal shaft (7) is arranged along the radial direction of the long rod (5). The lower end of the short rod (6) is sleeved on the second horizontal shaft (8), and the short rod (6) can rotate relative to the second horizontal shaft (8) about the axis of the second horizontal shaft (8), and the axis of the second horizontal shaft (8) is arranged along the radial direction of the short rod (6). The first horizontal shaft (7), the second horizontal shaft (8) and the first step plate (9) form a first step assembly. The first step assembly, the second step assembly, the third step assembly,..., and the Nth step assembly are arranged in a stepped manner. The second step assembly, the third step assembly,..., and the Nth step assembly have the same structure, and each of the second step assembly, the third step assembly,..., and the Nth step assembly comprises:

2. The mobile stairway of claim 1, wherein, The third horizontal shaft (10) has an axis along the X direction, and the two ends are respectively arranged in the two long rods (5), and the long rod (5) can rotate relative to the horizontal shaft about the axis of the third horizontal shaft (10). The fourth horizontal shaft (11) has an axis along the X direction, and the two ends are respectively arranged in the two short rods (6), and the short rod (6) can rotate relative to the fourth horizontal shaft (11) about the axis of the fourth horizontal shaft (11). The third horizontal shaft (10) and the fourth horizontal shaft (11) are fixed with the second step plate (12) in common. When viewed along the X direction, the point where the first horizontal shaft (7) is located is point A, the point where the second horizontal shaft (8) is located is point B, the point where the third horizontal shaft (10) of any one step assembly other than the first step assembly is located is point D, and the point where the fourth horizontal shaft (11) is located is point C, and then the quadrilateral ABCD is a parallelogram. The lifting assembly is used to rotate the long rod (5) relative to the first horizontal shaft (7) about the axis of the first horizontal shaft (7). The lifting assembly comprises: Two vertical rods (13) are respectively fixed on the two horizontal rods (1), and the axis of the vertical rod (13) is arranged in the vertical direction. Strip-shaped holes (14) are arranged on the two vertical rods (13) and the two vertical rods (2). The working frame is movably clamped on the corresponding vertical rod (13) and vertical rod (2) through the strip-shaped hole (14), and can move vertically along the strip-shaped hole (14) relative to the vertical rod (13) and vertical rod (2); The working bench step (17) is provided with two edge frames of the working frame in the Y direction, which are respectively rod one (15) and rod two (16), and the working bench step (17) is fixed on the rod one (15) and rod two (16) together; the working bench step (17), the rod one (15) and the rod two (16) together constitute the N+1 step assembly, and the N+1 step assembly and the N step assembly are arranged in a stepped manner; The two ends of the working bench step (17) in the X direction are respectively provided with a sliding groove (18), and the length direction of the sliding groove (18) is along the Y direction; The upper end of the two long rods (5) is fixed with a sliding rod (19), the axis of the sliding rod (19) is along the X direction, the end of the sliding rod (19) away from the long rod (5) is in the corresponding sliding groove (18), the sliding rod (19) can move along the Y direction relative to the sliding groove (18), and the sliding rod (19) can also rotate relative to the sliding groove (18) around its own axis; The non-extendible end of the electric push rod (20) is fixed on the horizontal rod (1), and the extendible end is arranged vertically; the extendible end of the electric push rod (20) is fixed with a connecting rod (21), the connecting rod (21) is arranged vertically, and the upper end of the connecting rod (21) is fixed with the working frame.

3. The mobile elevated work platform of claim 2, wherein, From any one of the second step assembly, the third step assembly, …, the N step assembly, the third horizontal shaft (10) and the fourth horizontal shaft (11) of the step assembly pass through the long rod (5) and the short rod (6) correspondingly, and the long rod (5) and the short rod (6) are provided with holes for the third horizontal shaft (10) and the fourth horizontal shaft (11) to pass through; the third horizontal shaft (10) and the fourth horizontal shaft (11) of the step assembly are fixed with clamping blocks at both ends, the two long rods (5) are located between the two clamping blocks at both ends of the third horizontal shaft (10), the two short rods (6) are located between the two clamping blocks at both ends of the fourth horizontal shaft (11), and the size of the clamping block is greater than the hole diameter of the hole for the third horizontal shaft (10) and the fourth horizontal shaft (11) to pass through on the long rod (5) and the short rod (6).

4. The mobile stairway of claim 2, wherein, The horizontal rod (1) of the guardrail is provided with universal wheels (3) and supporting legs (4) at the lower end.

5. The mobile elevated work platform of claim 4, wherein, The guardrail further comprises a device rod (22), the two ends of the device rod (22) are fixed with the vertical rod (2) and the horizontal rod (1) respectively, and a lifting rod (23) is fixed on the device rod (22).

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