Ladder

Abstract

The utility model relates to a ladder. The ladder comprises at least two ladder units, wherein the bottom end of one step unit is inserted into the other step unit, and one step unit can slide relative to the other step unit; each step unit comprises a foldable transverse step, a first vertical rod and a second vertical rod, wherein the first vertical rod and the second vertical rod are oppositely arranged. The two opposite ends of the foldable transverse step are rotationally connected with the first vertical rod and the second vertical rod correspondingly. On one hand, one step unit can slide relative to the other step unit, so that the height of the ladder is convenient to adjust, and the application range is enlarged; meanwhile, carrying and storage are convenient; and on the other hand, by arranging the foldable transverse steps, the carrying convenience is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ladders, in particular to a ladder. Background Art

[0002] At present, in daily life, people often use ladders to get things placed at high places. Ladders are even more common in the decoration and construction industries. The ladders generally used now are H-shaped ladders, which are composed of vertical pipes that are approximately parallel to each other and horizontal bars fixed on the vertical pipes at equal intervals. When the H-shaped ladder is used, the ladder is tilted against a support, and people can step on the horizontal bars to go up. This ladder can also be used as a bridge. When in use, it only needs to be placed horizontally so that the ladder is overlapped at higher positions on both sides, so that users can easily pass through some low-lying or sunken areas.

[0003] However, existing ladders are generally shorter, usually only three to four meters in length, which limits their application occasions; at the same time, they are inconvenient to carry and place. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a ladder, which has the advantages of increasing the scope of application and being easy to carry and place.

[0005] The above-mentioned utility model object of the utility model is achieved through the following technical scheme: a ladder, comprising at least two ladder units; the bottom end of one of the ladder units is inserted into the other ladder unit, and one of the ladder units can slide relative to the other ladder unit; the ladder unit comprises a foldable horizontal step and a first vertical rod and a second vertical rod arranged oppositely, and the opposite ends of the foldable horizontal step are rotatably connected to the first vertical rod and the second vertical rod respectively.

[0006] Preferably, in the ladder provided by the utility model, the first vertical pole includes a first vertical tube and a first horizontal turning rod, one end of the first horizontal turning rod is connected to the outer peripheral wall near the top end of the first vertical tube, and the other end of the first horizontal turning rod extends outward along the radial direction of the first vertical tube; the first end of the foldable horizontal step is sleeved on the first horizontal turning rod, and the foldable horizontal step can rotate relative to the first horizontal turning rod.

[0007] Preferably, in the ladder provided by the utility model, the second vertical pole includes a second vertical tube and a second horizontal turning rod, one end of the second horizontal turning rod is connected to the outer peripheral wall near the top end of the second vertical tube, the other end of the second horizontal turning rod extends radially outward along the second vertical tube, and the center line of the first horizontal turning rod is arranged parallel to the center line of the second horizontal turning rod; the second end of the foldable horizontal step is sleeved on the second horizontal turning rod, and the foldable horizontal step can rotate relative to the second horizontal turning rod.

[0008] Preferably, in the ladder provided by the utility model, the foldable horizontal step includes a first connecting rod and a second connecting rod, one end of the first connecting rod is rotatably connected to the first horizontal rotating rod, the other end of the first connecting rod is rotatably connected to one end of the second connecting rod, and the end of the second connecting rod facing away from the first connecting rod is rotatably connected to the second horizontal rotating rod.

[0009] Preferably, in the ladder provided by the utility model, the first connecting rod includes a first sleeve, a straight rod and a second sleeve, one end of the straight rod is connected to the outer peripheral wall of the first sleeve, and the other end of the straight rod is connected to the outer peripheral wall of the second sleeve, and the center lines of the first sleeve and the second sleeve are both arranged perpendicular to the center line of the straight rod.

[0010] Preferably, in the ladder provided by the utility model, the foldable horizontal step also includes a locking screw, the first sleeve is used to be sleeved on the first horizontal turning rod, the first sleeve can rotate relative to the first horizontal turning rod, a first through hole extending along the radial direction of the first sleeve is opened on the outer peripheral wall of the first sleeve, the first through hole is connected with the cavity of the first sleeve, a second through hole extending along the radial direction of the second sleeve is opened on the outer peripheral wall of the second sleeve, the second through hole is connected with the cavity of the second sleeve, a first threaded hole is opened on the outer peripheral wall of the first horizontal turning rod, the first threaded hole extends along the radial direction of the first horizontal turning rod; when the foldable horizontal step is in an open state, the first through hole and the first threaded hole are arranged correspondingly, the first through hole is connected with the first threaded hole, and one end of the locking screw passes through the first through hole and cooperates with the first threaded hole.

[0011] Preferably, in the ladder provided by the utility model, the second connecting rod includes a connecting rod, a rotating shaft and a third sleeve, one end of the connecting rod is connected to the outer peripheral wall of the rotating shaft, the other end of the connecting rod is connected to the outer peripheral wall of the third sleeve, the connecting rod is provided with a groove at one end facing the rotating shaft, the second sleeve is sleeved on the rotating shaft, and part of the second sleeve is accommodated in the groove, the second sleeve can rotate relative to the rotating shaft, the third sleeve is sleeved on the second horizontal rotating rod, and the third sleeve can rotate relative to the second horizontal rotating rod.

[0012] Preferably, the ladder provided by the utility model, the foldable horizontal step also includes a first locking screw and a second locking screw, a second threaded hole is opened on the outer peripheral wall of the rotating shaft, the second threaded hole extends along the radial direction of the rotating shaft, a third through hole extending along the radial direction of the third sleeve is opened on the outer peripheral wall of the third sleeve, the third through hole is connected with the cavity of the third sleeve, and a third threaded hole extending along the radial direction of the second horizontal rotating rod is opened on the outer peripheral wall of the second horizontal rotating rod; when the foldable horizontal step is in an open state, the second through hole is correspondingly arranged with the second threaded hole, the second through hole is connected with the second threaded hole, one end of the first locking screw passes through the second through hole and cooperates with the second threaded hole; the third through hole is correspondingly arranged with the third threaded hole, the third through hole is connected with the third threaded hole, and one end of the second locking screw passes through the third through hole and cooperates with the third threaded hole.

[0013] Preferably, in the ladder provided by the utility model, the outer peripheral walls of the first upright pole and the second upright pole in the ladder unit at the bottom are both provided with supporting legs, and the supporting legs can rotate relative to the first upright pole and / or the second upright pole.

[0014] Preferably, in the ladder provided by the present invention, the outer peripheral walls of the first upright pole and the second upright pole are engraved with scales.

[0015] To sum up, the beneficial technical effects of the utility model are as follows: the ladder provided in the present application comprises at least two ladder units; the bottom end of one of the ladder units is inserted into the other ladder unit, and one of the ladder units can slide relative to the other ladder unit; the ladder unit comprises a foldable horizontal step and a first vertical rod and a second vertical rod arranged oppositely, and the opposite ends of the foldable horizontal step are rotatably connected to the first vertical rod and the second vertical rod respectively; on the one hand, by arranging that one of the ladder units can slide relative to the other ladder unit, it is convenient to adjust the height of the ladder and increase the scope of application; at the same time, it is convenient to carry and store; on the other hand, by arranging the foldable horizontal step, the convenience of carrying is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of a ladder provided by an embodiment of the utility model.

[0017] Figure 2 It is a cross-sectional view of two adjacent first vertical pipes or two adjacent second vertical pipes in the ladder provided by the embodiment of the utility model.

[0018] Figure 3 It is a structural schematic diagram of a foldable horizontal step in a ladder provided in an embodiment of the utility model.

[0019] In the figure, 1, ladder; 10, ladder unit; 11, foldable horizontal step; 111, first connecting rod; 1111, first sleeve; 1112, straight rod; 1113, second sleeve; 112, second connecting rod; 1121, connecting rod; 1122, rotating shaft; 1123, third sleeve; 1124, groove; 12, first vertical rod; 121, first vertical tube; 1211, first stop boss; 1212, first limiting flange; 122, first horizontal rotating rod; 1221, first stop flange; 13, second vertical rod; 131, second vertical tube; 1311, second stop boss; 1312, second limiting flange; 132, second horizontal rotating rod; 1321, second stop flange; 14, supporting leg. DETAILED DESCRIPTION

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0021] Reference Figure 1 , is a ladder 1 disclosed in the utility model, comprising at least two ladder units 10; the bottom end of one of the ladder units 10 is inserted into the other ladder unit 10, and one of the ladder units 10 can slide relative to the other ladder unit 10; the ladder unit 10 comprises a foldable horizontal step 11 and a first vertical rod 12 and a second vertical rod 13 arranged oppositely, and the opposite ends of the foldable horizontal step 11 are rotatably connected to the first vertical rod 12 and the second vertical rod 13 respectively; on the one hand, by arranging that one of the ladder units 10 can slide relative to the other ladder unit 10, it is convenient to adjust the height of the ladder 1 and increase the scope of application; at the same time, it is convenient to carry and store; on the other hand, by arranging the foldable horizontal step 11, the convenience of carrying is further improved.

[0022] The ladder 1 of the present embodiment may include two step units 10, three step units 10, four step units 10 or five step units 10, etc., which is not limited in the present embodiment.

[0023] For the convenience of explanation, the following description is made by taking the ladder 1 including four step units 10 as an example.

[0024] Among them, four step units 10 are arranged in sequence from top to bottom, and every two adjacent step units 10 can be slidably connected, thereby facilitating the adjustment of the total height of the ladder 1 and increasing the scope of application.

[0025] by Figure 1Taking the shown orientation as an example, the four step units 10 are, from top to bottom, the first step unit 10, the second step unit 10, the third step unit 10 and the fourth step unit 10; the first upright 12 and the second upright 13 in the first step unit 10 are respectively inserted into the first upright 12 and the second upright 13 in the second step unit 10, the first upright 12 and the second upright 13 in the second step unit 10 are respectively inserted into the first upright 12 and the second upright 13 in the third step unit 10, and the first upright 12 and the second upright 13 in the third step unit 10 are respectively inserted into the first upright 12 and the second upright 13 in the third step unit 10.

[0026] Among them, the first vertical rod 12 in the first step unit 10 can slide relative to the first vertical rod 12 in the second step unit 10, the first vertical rod 12 in the second step unit 10 can slide relative to the first vertical rod 12 in the third step unit 10, and the first vertical rod 12 in the third step unit 10 can slide relative to the first vertical rod 12 in the fourth step unit 10; the second vertical rod 13 in the first step unit 10 can slide relative to the second vertical rod 13 in the second step unit 10, the second vertical rod 13 in the second step unit 10 can slide relative to the second vertical rod 13 in the third step unit 10, and the second vertical rod 13 in the third step unit 10 can slide relative to the second vertical rod 13 in the fourth step unit 10.

[0027] The use process of the ladder 1 provided in this embodiment is as follows: the storage process of the ladder 1 is as follows: the first upright rod 12 and the second upright rod 13 in the first ladder unit 10 are respectively slid into the first upright rod 12 and the second upright rod 13 in the second ladder unit 10, the first upright rod 12 and the second upright rod 13 in the second ladder unit 10 are respectively slid into the first upright rod 12 and the second upright rod 13 in the third ladder unit 10, and the first upright rod 12 and the second upright rod 13 in the third ladder unit 10 are respectively slid into the first upright rod 12 and the second upright rod 13 in the fourth ladder unit 10 to shorten the height of the ladder 1, and the foldable horizontal steps 11 in the four ladder units 10 are folded to shorten the width of the ladder 1.

[0028] The unfolding process of the ladder 1 is as follows: part of the first upright rod 12 and part of the second upright rod 13 in the first ladder unit 10 are respectively slid out of the first upright rod 12 and the second upright rod 13 in the second ladder unit 10, part of the first upright rod 12 and part of the second upright rod 13 in the second ladder unit 10 are respectively slid out of the first upright rod 12 and the second upright rod 13 in the third ladder unit 10, part of the first upright rod 12 and part of the second upright rod 13 in the third ladder unit 10 are respectively slid into the first upright rod 12 and the second upright rod 13 in the fourth ladder unit 10 to extend the height of the ladder 1, and the foldable horizontal steps 11 in the four ladder units 10 are unfolded to expand the width of the ladder 1.

[0029] Furthermore, in this embodiment, the first vertical pole 12 includes a first vertical tube 121 and a first horizontal turning rod 122, one end of the first horizontal turning rod 122 is connected to the outer peripheral wall near the top of the first vertical tube 121, and the other end of the first horizontal turning rod 122 extends radially outward along the first vertical tube 121; the first end of the foldable horizontal step 11 is sleeved on the first horizontal turning rod 122, and the foldable horizontal step 11 can rotate relative to the first horizontal turning rod 122.

[0030] Specifically, the end of the first horizontal rotating rod 122 away from the first vertical tube 121 is a free end, and the end of the first horizontal rotating rod 122 away from the first vertical tube 121 is provided with a first stop flange 1221, and the first stop flange 1221 extends radially outward along the first horizontal rotating rod 122, and the first stop flange 1221 is used to prevent the end of the foldable horizontal step 11 from sliding out of the first horizontal rotating rod 122.

[0031] Continue to refer to Figure 2 In this embodiment, when the height of the ladder 1 is extended, in order to prevent the first vertical tube 121 in the upper step unit 10 from sliding out of the first vertical tube 121 in the adjacent lower step unit 10, except for the fourth step unit 10, the bottom ends of the first vertical tubes 121 in the remaining step units 10 are provided with a first stop boss 1211, and the first stop boss 1211 extends outward along the radial direction of the first vertical tube 121. Except for the first step unit 10, the first vertical tubes 121 in the remaining step units 10 are provided with a first limiting flange 1212, and the first limiting flange 1212 is arranged on the inner circumferential wall near the top end of the first vertical tube 121.

[0032] When the first vertical tube 121 in the first step unit 10 slides to the highest position along the first vertical tube 121 in the second step unit 10, the top surface of the first stop boss 1211 contacts the bottom surface of the first limiting flange 1212, thereby preventing the first vertical tube 121 in the first step unit 10 from sliding out of the first vertical tube 121 in the second step unit 10.

[0033] A plurality of fixing holes are provided on the outer peripheral wall of the first vertical tube 121, and the plurality of fixing holes are arranged at intervals along the center line direction of the first vertical tube 121. The plurality of fixing holes extend along the radial direction of the first vertical tube 121, and the plurality of fixing holes are communicated with the cavity of the first vertical tube 121; an internal thread is provided on the inner peripheral wall of the fixing hole, and the internal thread is adapted to the external thread of the fixing screw used to prevent the first vertical tube 121 from sliding.

[0034] When the first vertical tube 121 in the first step unit 10 slides to a specified position along the first vertical tube 121 in the second step unit 10, one end of the fixing screw is inserted into the corresponding fixing hole of the first vertical tube 121 in the first step unit 10 through the fixing hole on the first vertical tube 121 in the second step unit 10 to lock the first vertical tube 121 in the first step unit 10.

[0035] Furthermore, in this embodiment, the second vertical pole 13 includes a second vertical tube 131 and a second horizontal turning rod 132, one end of the second horizontal turning rod 132 is connected to the outer peripheral wall near the top of the second vertical tube 131, and the other end of the second horizontal turning rod 132 extends radially outward along the second vertical tube 131, and the center line of the first horizontal turning rod 122 is arranged parallel to the center line of the second horizontal turning rod 132; the second end of the foldable horizontal step 11 is sleeved on the second horizontal turning rod 132, and the foldable horizontal step 11 can rotate relative to the second horizontal turning rod 132.

[0036] It should be noted that the center line of the first horizontal rotating rod 122 is arranged in parallel with the center line of the second horizontal rotating rod 132 , and the first horizontal rotating rod 122 and the second horizontal rotating rod 132 are located on the same side.

[0037] Specifically, the end of the second horizontal rotating rod 132 away from the second vertical tube 131 is a free end, and the end of the second horizontal rotating rod 132 away from the second vertical tube 131 is provided with a second stop flange 1321, and the second stop flange 1321 extends radially outward along the second horizontal rotating rod 132, and the second stop flange 1321 is used to prevent the end of the foldable horizontal step 11 from sliding out of the second horizontal rotating rod 132.

[0038] Continue to refer to Figure 2 In this embodiment, except for the fourth step unit 10, the bottom end of the second vertical tube 131 in the remaining step units 10 is provided with a second stop boss 1311, and the second stop boss 1311 extends outward along the radial direction of the second vertical tube 131. Except for the first step unit 10, the second vertical tube 131 in the remaining step units 10 is provided with a second limiting flange 1312, and the second limiting flange 1312 is arranged on the inner circumferential wall near the top end of the second vertical tube 131.

[0039] When the second vertical tube 131 in the first step unit 10 slides to the highest position along the second vertical tube 131 in the second step unit 10, the top surface of the second stop boss 1311 contacts the bottom surface of the second limiting flange 1312, thereby preventing the second vertical tube 131 in the first step unit 10 from sliding out of the second vertical tube 131 in the second step unit 10.

[0040] A plurality of mounting holes are provided on the outer peripheral wall of the second vertical tube 131, and the plurality of mounting holes are arranged at intervals along the center line direction of the second vertical tube 131. The plurality of mounting holes extend along the radial direction of the second vertical tube 131, and the plurality of mounting holes are connected to the cavity of the second vertical tube 131; an internal thread is provided on the inner peripheral wall of the mounting hole, and the internal thread is adapted to the external thread of the fastening screw used to prevent the second vertical tube 131 from sliding.

[0041] When the second vertical tube 131 in the first step unit 10 slides to a specified position along the second vertical tube 131 in the second step unit 10, one end of the fastening screw is inserted into the corresponding mounting hole on the second vertical tube 131 in the first step unit 10 through the mounting hole on the second vertical tube 131 in the second step unit 10 to lock the second vertical tube 131 in the first step unit 10.

[0042] Continue to refer to Figure 1 and Figure 3 In this embodiment, the foldable horizontal step 11 includes a first connecting rod 111 and a second connecting rod 112, one end of the first connecting rod 111 is rotatably connected to the first horizontal rotating rod 122, the other end of the first connecting rod 111 is rotatably connected to one end of the second connecting rod 112, and the end of the second connecting rod 112 facing away from the first connecting rod 111 is rotatably connected to the second horizontal rotating rod 132.

[0043] by Figure 1 Taking the illustrated position as an example, when the foldable horizontal step 11 is stored, the first connecting rod 111 rotates clockwise and the second connecting rod 112 rotates counterclockwise, so that the first connecting rod 111 contacts the second connecting rod 112, thereby folding and storing the foldable horizontal step 11.

[0044] Furthermore, in this embodiment, the first connecting rod 111 includes a first sleeve 1111, a straight rod 1112 and a second sleeve 1113, one end of the straight rod 1112 is connected to the outer peripheral wall of the first sleeve 1111, and the other end of the straight rod 1112 is connected to the outer peripheral wall of the second sleeve 1113, and the center lines of the first sleeve 1111 and the second sleeve 1113 are both arranged perpendicular to the center line of the straight rod 1112.

[0045] Exemplarily, the first end of the straight rod 1112 is connected to the middle position of the first sleeve 1111 extending along the center line direction thereof, and the second end of the straight rod 1112 is connected to the middle position of the second sleeve 1113 extending along the center line direction thereof.

[0046] The center line of the first sleeve 1111 is arranged parallel to the center line of the second sleeve 1113 .

[0047] Furthermore, in this embodiment, the foldable horizontal step 11 also includes a locking screw, and the first sleeve 1111 is used to be sleeved on the first horizontal rotating rod 122. The first sleeve 1111 can rotate relative to the first horizontal rotating rod 122. A first through hole extending radially along the first sleeve 1111 is opened on the outer peripheral wall of the first sleeve 1111, and the first through hole is connected to the cavity of the first sleeve 1111. A second through hole extending radially along the second sleeve 1113 is opened on the outer peripheral wall of the second sleeve 1113, and the second through hole is connected to the cavity of the second sleeve 1113. A first threaded hole is opened on the outer peripheral wall of the first horizontal rotating rod 122, and the first threaded hole extends radially along the first horizontal rotating rod 122.

[0048] When the foldable horizontal step 11 is in the open state, the first through hole is arranged correspondingly to the first threaded hole, and the first through hole is connected to the first threaded hole. At this time, the center line of the first through hole is arranged colinearly with the center line of the first threaded hole, and one end of the locking screw passes through the first through hole and cooperates with the first threaded hole.

[0049] Furthermore, in this embodiment, the second connecting rod 112 includes a connecting rod 1121, a rotating shaft 1122 and a third sleeve 1123, one end of the connecting rod 1121 is connected to the outer peripheral wall of the rotating shaft 1122, and the other end of the connecting rod 1121 is connected to the outer peripheral wall of the third sleeve 1123, and a groove 1124 is opened at one end of the connecting rod 1121 facing the rotating shaft 1122, the second sleeve 1113 is sleeved on the rotating shaft 1122, and part of the second sleeve 1113 is accommodated in the groove 1124, the second sleeve 1113 can rotate relative to the rotating shaft 1122, the third sleeve 1123 is sleeved on the second horizontal rotating rod 132, and the third sleeve 1123 can rotate relative to the second horizontal rotating rod 132.

[0050] Specifically, the center line of the rotating shaft 1122 is arranged in parallel with the center line of the third sleeve 1123 , and the center line of the rotating shaft 1122 and the center line of the third sleeve 1123 are both arranged perpendicular to the center line of the connecting rod 1121 .

[0051] Furthermore, in this embodiment, the foldable horizontal step 11 also includes a first locking screw and a second locking screw, a second threaded hole is opened on the outer peripheral wall of the rotating shaft 1122, and the second threaded hole extends radially along the rotating shaft 1122, a third through hole extending radially along the third sleeve 1123 is opened on the outer peripheral wall of the third sleeve 1123, the third through hole is connected to the cavity of the third sleeve 1123, and a third threaded hole extending radially along the second horizontal rotating rod 132 is opened on the outer peripheral wall of the second horizontal rotating rod 132.

[0052] When the foldable horizontal step 11 is in the open state, the second through hole is arranged correspondingly to the second threaded hole, and the second through hole is connected to the second threaded hole. At this time, the center line of the second through hole is collinear with the center line of the second threaded hole, and one end of the first locking screw passes through the second through hole and cooperates with the second threaded hole; the third through hole is arranged correspondingly to the third threaded hole, and the third through hole is connected to the third threaded hole. At this time, the center line of the third through hole is collinear with the center line of the third threaded hole, and one end of the second locking screw passes through the third through hole and cooperates with the third threaded hole.

[0053] Furthermore, in this embodiment, a storage box for storing tools is provided on the outer peripheral wall of the ladder unit 10 at the bottom.

[0054] Specifically, a storage box is provided on the outer peripheral wall of the first vertical tube 121 and / or the second vertical tube 131 in the fourth step unit 10, and the storage box is used to store tools, locking screws, locking screws, fixing screws and fastening screws.

[0055] The side walls of the storage box can be rotated to open and rotated to close.

[0056] Furthermore, in this embodiment, scales are engraved on the outer peripheral walls of the first upright pole 12 and the second upright pole 13 .

[0057] Specifically, scales are engraved on the first vertical tube 121 and the second vertical tube 131. During use, the extended length of each step unit 10 is calculated according to the height of the platform to be climbed, and each step unit 10 is stretched according to the calculated length and the scales.

[0058] Furthermore, in the present embodiment, the outer peripheral walls of the first upright 12 and the second upright 13 in the ladder unit 10 at the bottom are provided with supporting legs 14, and the supporting legs 14 can rotate relative to the first upright 12 and / or the second upright 13; by providing the supporting legs 14, the contact area with the ground is increased, thereby improving the stability of the ladder 1.

[0059] Specifically, the top end of the support leg 14 is rotatably connected to the outer peripheral wall of the first vertical tube 121 and / or the second vertical tube 131 in the fourth step unit 10, and the bottom end of the support leg 14 is a free end, and the bottom end of the support leg 14 is used to contact the ground.

[0060] Among them, the top end of the support leg 14 is rotatably connected to the first vertical tube 121 and / or the second vertical tube 131 in the fourth step unit 10 through a rotating shaft, and the center line of the rotating shaft is set parallel to the center line of the first horizontal rotating rod 122. During use, the top end of the support leg 14 rotates around the center line of the rotating shaft as the axis.

[0061] During use, the bottom ends of the first vertical tube 121 and the second vertical tube 131 in the fourth step unit 10 are in contact with the ground, and the support leg 14 is rotated so that one end of the support leg 14 away from the first vertical tube 121 and / or the second vertical tube 131 is in contact with the ground. At this time, the support leg 14 and the first vertical tube 121 and / or the second vertical tube 131 form a triangle.

[0062] It should be noted that the two legs 14 are located at two opposite sides of the fourth step unit 10 .

[0063] The use process of the ladder 1 provided in this embodiment is as follows: according to the height of the platform to be climbed, each step unit 10 is lengthened to make the height of the ladder 1 match the height of the platform to be climbed, and the first vertical tube 121 and the second vertical tube 131 are pulled to both sides with both hands at the same time to open the foldable horizontal step 11, and the first sleeve 1111 and the first horizontal rotating rod 122 are locked with the locking screw, and the second sleeve 1113 and the rotating shaft 1122 are locked with the first locking screw, and the third sleeve 1123 and the second horizontal rotating rod 132 are locked with the second locking screw, and then, the ladder 1 is tilted against the platform to be climbed, and the support leg 14 is rotated so that the bottom end of the support leg 14 contacts the ground.

[0064] The ladder 1 provided in the present application includes at least two ladder units 10; the bottom end of one of the ladder units 10 is inserted into the other ladder unit 10, and one of the ladder units 10 can slide relative to the other ladder unit 10; the ladder unit 10 includes a foldable horizontal step 11 and a first vertical rod 12 and a second vertical rod 13 arranged oppositely, and the opposite ends of the foldable horizontal step 11 are rotatably connected to the first vertical rod 12 and the second vertical rod 13 respectively; on the one hand, by arranging that one of the ladder units 10 can slide relative to the other ladder unit 10, it is convenient to adjust the height of the ladder 1 and increase the scope of application; at the same time, it is convenient to carry and store; on the other hand, by arranging the foldable horizontal step 11, the convenience of carrying is further improved.

[0065] The ladder 1 provided by the utility model has the following advantages: the device has a simple structure, is easy to manufacture, and is convenient to carry and place.

[0066] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0067] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A ladder, characterized in that: comprising at least two step units; The bottom end of one of the step units is inserted into the other step unit, and one of the step units can slide relative to the other step unit; The ladder unit comprises a foldable horizontal step and a first vertical rod and a second vertical rod which are arranged opposite to each other. The opposite ends of the foldable horizontal step are rotatably connected to the first vertical rod and the second vertical rod respectively.

2. The ladder according to claim 1, characterized in that: The first vertical rod comprises a first vertical tube and a first horizontal rotating rod, one end of the first horizontal rotating rod is connected to the outer peripheral wall near the top end of the first vertical tube, and the other end of the first horizontal rotating rod extends outward along the radial direction of the first vertical tube; The first end of the foldable horizontal step is sleeved on the first horizontal rotating rod, and the foldable horizontal step can rotate relative to the first horizontal rotating rod.

3. The ladder according to claim 2, characterized in that: The second vertical rod comprises a second vertical tube and a second horizontal rotating rod, one end of the second horizontal rotating rod is connected to the outer peripheral wall near the top end of the second vertical tube, the other end of the second horizontal rotating rod extends outward along the radial direction of the second vertical tube, and the center line of the first horizontal rotating rod is arranged parallel to the center line of the second horizontal rotating rod; The second end of the foldable horizontal step is sleeved on the second horizontal rotating rod, and the foldable horizontal step can rotate relative to the second horizontal rotating rod.

4. The ladder according to claim 3, characterized in that: The foldable horizontal step includes a first connecting rod and a second connecting rod, one end of the first connecting rod is rotatably connected to the first horizontal rotating rod, the other end of the first connecting rod is rotatably connected to one end of the second connecting rod, and the end of the second connecting rod facing away from the first connecting rod is rotatably connected to the second horizontal rotating rod.

5. The ladder according to claim 4, characterized in that: The first connecting rod includes a first sleeve, a straight rod and a second sleeve, one end of the straight rod is connected to the outer peripheral wall of the first sleeve, and the other end of the straight rod is connected to the outer peripheral wall of the second sleeve, and the center lines of the first sleeve and the second sleeve are both arranged perpendicular to the center line of the straight rod.

6. The ladder according to claim 5, characterized in that: The foldable horizontal step also includes a locking screw, the first sleeve is used to be sleeved on the first horizontal rotating rod, the first sleeve can rotate relative to the first horizontal rotating rod, a first through hole extending along the radial direction of the first sleeve is opened on the outer peripheral wall of the first sleeve, the first through hole is communicated with the cavity of the first sleeve, a second through hole extending along the radial direction of the second sleeve is opened on the outer peripheral wall of the second sleeve, the second through hole is communicated with the cavity of the second sleeve, and a first threaded hole is opened on the outer peripheral wall of the first horizontal rotating rod, and the first threaded hole extends along the radial direction of the first horizontal rotating rod; When the foldable horizontal step is in an open state, the first through hole is arranged corresponding to the first threaded hole, the first through hole is communicated with the first threaded hole, and one end of the locking screw passes through the first through hole and cooperates with the first threaded hole.

7. The ladder according to claim 6, characterized in that: The second connecting rod includes a connecting rod, a rotating shaft and a third sleeve, one end of the connecting rod is connected to the outer peripheral wall of the rotating shaft, and the other end of the connecting rod is connected to the outer peripheral wall of the third sleeve, and a groove is opened at one end of the connecting rod facing the rotating shaft. The second sleeve is sleeved on the rotating shaft, and part of the second sleeve is accommodated in the groove. The second sleeve can rotate relative to the rotating shaft. The third sleeve is sleeved on the second horizontal rotating rod, and the third sleeve can rotate relative to the second horizontal rotating rod.

8. The ladder according to claim 7, characterized in that: The foldable horizontal step further includes a first locking screw and a second locking screw, a second threaded hole is formed on the outer peripheral wall of the rotating shaft, and the second threaded hole extends along the radial direction of the rotating shaft, a third through hole is formed on the outer peripheral wall of the third sleeve and extends along the radial direction of the third sleeve, and the third through hole is communicated with the cavity of the third sleeve, and a third threaded hole is formed on the outer peripheral wall of the second horizontal rotating rod and extends along the radial direction of the second horizontal rotating rod; When the foldable horizontal step is in an open state, the second through hole is arranged correspondingly to the second threaded hole, the second through hole is connected to the second threaded hole, and one end of the first locking screw passes through the second through hole and cooperates with the second threaded hole; the third through hole is arranged correspondingly to the third threaded hole, the third through hole is connected to the third threaded hole, and one end of the second locking screw passes through the third through hole and cooperates with the third threaded hole.

9. The ladder according to claim 1, characterized in that: The outer peripheral walls of the first vertical rod and the second vertical rod in the ladder unit located at the bottom are both provided with supporting legs, and the supporting legs can rotate relative to the first vertical rod and / or the second vertical rod.

10. The ladder according to claim 1, characterized in that: The outer peripheral walls of the first upright pole and the second upright pole are engraved with scales.

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