Telescopic and foldable ladder stand

Abstract

The invention provides a telescopic and foldable ladder stand which comprises a telescopic ladder body, a telescopic mechanism connected with the telescopic ladder body, folding mechanisms and hooks, the telescopic mechanism comprises two sections, the telescopic ladder body and the telescopic mechanism are connected through the folding mechanisms, and the telescopic mechanisms between the two sections are connected through the folding mechanisms; the hook is arranged at the front end of the telescopic mechanism and is fixed with different section steel sections; the telescopic ladder body comprises an upper-end telescopic ladder column connected with the telescopic mechanism through a folding mechanism, a lower-end telescopic ladder column connected with the upper-end telescopic ladder column, a movable buckle for fixing the upper-end telescopic ladder column and the lower-end telescopic ladder column, and ladder steps arranged on the upper-end telescopic ladder column and the lower-end telescopic ladder column respectively. By means of the method, the problems that welding of a traditional crawling ladder and a steel beam affects damage to the steel beam, construction difficulty is large, flexibility is low, and the construction danger coefficient is high can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure construction, and particularly to a telescopic and foldable ladder for different steel section shapes. Background Art

[0002] In steel structures, situations such as welding and rust removal often require construction workers to perform high-altitude operations. Due to site restrictions, aerial work platforms cannot be used, and construction workers need to climb through ladders. Currently, on construction sites, round steel ladders are often welded to steel columns or steel beams to meet the climbing needs of on-site construction workers. This method is difficult to avoid damage to the steel columns and steel beams during welding. Moreover, due to the poor stiffness of the round steel ladders welded on-site, the risk coefficient for the high-altitude operations of on-site workers is increased. In addition, the installation and disassembly of welded ladders are difficult, and it is not convenient for on-site construction workers to use them flexibly. Summary of the Invention

[0003] In view of the above problems, the purpose of the present invention is to provide a telescopic and foldable ladder to solve problems such as damage to steel beams caused by welding traditional ladders to steel beams, high construction difficulty, low flexibility, and high construction risk coefficient.

[0004] The present invention provides a telescopic and foldable ladder, including: a telescopic ladder body, a telescopic mechanism connected to the telescopic ladder body, a folding mechanism, and a hook. Among them,

[0005] The telescopic mechanism includes two sections, and both the telescopic ladder body and the telescopic mechanism between the two sections are connected through the folding mechanism;

[0006] The hook is arranged at the front end of the telescopic mechanism and fixed to different steel section shapes;

[0007] The telescopic ladder body includes an upper telescopic ladder column connected to the telescopic mechanism through the folding mechanism, a lower telescopic ladder column connected to the upper telescopic ladder column, a movable buckle for fixing the upper telescopic ladder column and the lower telescopic ladder column, and ladder steps respectively arranged on the upper telescopic ladder column and the lower telescopic ladder column.

[0008] Preferably, the folding mechanism includes an upper folding block, a lower folding block, a folding rotation shaft, and a folding movable pin arranged between the upper folding block and the lower folding block; among them,

[0009] The folding mechanism has a 180° open state and a 90° folded state, and the folding rotation shaft is used to rotate the folding mechanism from one working state to another;

[0010] A fixing hole is arranged between the upper folding block and the lower folding block, and the folding movable pin is arranged in the fixing hole.

[0011] Preferably, the folding mechanism further includes a fixing ring and a connecting rope, wherein,

[0012] The fixing ring is arranged on the upper folding block or the lower folding block, and two ends of the connecting rope are respectively connected with the folding movable bolt and the fixing ring.

[0013] Preferably, when the folding mechanism is switched between two working states, the folding movable bolt is pulled out from the fixing hole;

[0014] The upper folding block and the lower folding block are rotated to another working state through the folding rotating shaft;

[0015] The folding movable bolt is inserted into the fixing hole to complete the conversion of the working state.

[0016] Preferably, the telescopic mechanism includes a telescopic outer shell, a telescopic inner rod adapted to the telescopic outer shell, and a pressable button for adjusting the relative position between the telescopic outer shell and the telescopic inner rod, wherein,

[0017] A hollow structure for accommodating the telescopic expansion and contraction of the telescopic inner rod is arranged inside the telescopic outer shell, through holes adapted to the pressable button are respectively arranged on the telescopic outer shell and the telescopic inner rod, and the pressable button is fixed in the corresponding through holes of the telescopic outer shell and the telescopic inner rod.

[0018] Preferably, the pressable button includes a fixed round shell arranged in the through hole of the telescopic inner rod, a button cap arranged in the through hole of the telescopic outer shell, and a spring, wherein,

[0019] One end of the spring is fixed on the button cap, and the other end is fixed on the fixed round shell.

[0020] Preferably, when adjusting the relative position between the telescopic outer shell and the telescopic inner rod,

[0021] By pressing the button cap, the relative position between the telescopic outer shell and the telescopic inner rod is adjusted;

[0022] When the relative position between the telescopic outer shell and the telescopic inner rod is adjusted to a preset relative position, the button cap is released;

[0023] Under the action of the spring, the button cap rebounds again and fixes the telescopic outer shell and the telescopic inner rod to complete the length adjustment of the telescopic mechanism.

[0024] Preferably, the tread includes an upper tread beam and a lower tread beam, wherein,

[0025] An anti-slip mat is provided on the upper end ladder beam, and an anti-slip mat is provided on the lower end ladder beam.

[0026] Preferably, the ladder column movable buckle includes a buckle, a buckle movable bolt and a buckle rotating shaft provided on the buckle, and a buckle fixing block for fixing the buckle movable bolt.

[0027] Preferably, slide rails are respectively provided on the upper end telescopic ladder column and the lower end telescopic ladder column, and the length of the telescopic ladder body is adjusted through the slide rails;

[0028] When adjusting the length of the telescopic ladder body, pull out the buckle movable bolt from the buckle;

[0029] Rotate the buckle through the buckle rotating shaft, and adjust the relative positions of the upper end telescopic ladder column and the lower end telescopic ladder column through the slide rails;

[0030] When the upper end telescopic ladder column and the lower end telescopic ladder column slide to a preset position, align the upper end ladder beam and the lower end ladder beam at the buckle position, and rotate the buckle to the ladder beam for fixation.

[0031] As can be seen from the above technical solutions, compared with the prior art, the telescopic and foldable ladder provided by the present invention may have the following beneficial effects:

[0032] (1) Compared with the traditional on-site welded ladder, the telescopic and foldable ladder of the present invention can avoid on-site high-altitude hot work, thereby reducing the damage of steel during welding and reducing the on-site installation difficulty;

[0033] (2) The ladder provided by the present invention uses less steel, thus reducing construction measures, construction difficulty and construction cost;

[0034] (3) The ladder provided by the present invention has strong applicability, can be applied to different section steel (H-shaped steel, I-beam, box girder), walls (steel plate shear wall, parapet wall), etc., and can be reused;

[0035] (4) The ladder provided by the present invention is a detachable connection device, thereby improving the installation convenience, facilitating the replacement of parts and improving the construction efficiency.

[0036] To achieve the above and related purposes, one or more aspects of the present invention include the features that will be described in detail later. The following description and the accompanying drawings illustrate certain exemplary aspects of the present invention in detail. However, these aspects merely indicate some of the various ways in which the principles of the present invention can be used. In addition, the present invention is intended to include all these aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easier to understand. In the drawings:

[0038] Figure 1 Schematic diagram of the state where a ladder according to an embodiment of the present invention is applied to different steel section shapes;

[0039] Figure 2 Schematic diagram of the working state I of a ladder according to an embodiment of the present invention;

[0040] Figure 3 Schematic diagram of the working state II of a ladder according to an embodiment of the present invention;

[0041] Figure 4 Schematic diagram of the working state III of a ladder according to an embodiment of the present invention;

[0042] Figure 5 Schematic diagram of the folding mechanism of a ladder according to an embodiment of the present invention;

[0043] Figure 6 Schematic diagram of the telescopic mechanism of a ladder according to an embodiment of the present invention;

[0044] Figure 7 Schematic diagram of the ladder step and the movable buckle of a ladder according to an embodiment of the present invention.

[0045] The reference numerals therein include:

[0046] 1. Hook;

[0047] 2. Folding mechanism, 21. Upper folding block, 22. Folding rotating shaft, 23. Lower folding block, 24. Fixed ring, 25. Folding movable bolt, 26. Connecting rope;

[0048] 3. Telescopic mechanism, 31. Telescopic housing, 32. Telescopic inner rod, 33. Pressable button, 331. Fixed circular shell, 332. Spring, 333. Button cap;

[0049] 4. Upper telescopic ladder column;

[0050] 5. Ladder step, 51. Anti-slip pad on the upper ladder beam, 52. Upper ladder beam, 53. Anti-slip pad on the lower ladder beam, 54. Lower ladder beam;

[0051] 6. Movable buckle, 61. Buckle movable bolt, 62. Buckle rotating shaft, 63. Buckle, 64. Buckle fixed block;

[0052] 7. Lower telescopic ladder column.

[0053] In all the drawings, the same reference numerals indicate similar or corresponding features or functions. Detailed implementation manners

[0054] In the following description, for purposes of explanation, in order to provide a thorough understanding of one or more embodiments, numerous specific details are set forth. However, it is apparent that the embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0056] In view of the problems of the traditional ladder welded to the steel beam mentioned above, such as damage to the steel beam, high construction difficulty, low flexibility, and high construction risk coefficient, the present invention provides a telescopic and foldable ladder.

[0057] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0058] In order to illustrate the structure of the telescopic and foldable ladder provided by the present invention, Figures 1 to 7 the telescopic and foldable ladder is exemplarily marked from different angles. Specifically, Figure 1 it shows the state of the ladder according to an embodiment of the present invention applied to different steel section shapes; Figure 2 it shows the first working form of the ladder according to an embodiment of the present invention; Figure 3 it shows the second working form of the ladder according to an embodiment of the present invention; Figure 4 it shows the third working form of the ladder according to an embodiment of the present invention; Figure 5 it shows the folding mechanism of the ladder according to an embodiment of the present invention; Figure 6 it shows the telescopic mechanism of the ladder according to an embodiment of the present invention; Figure 7 it shows the ladder steps and movable buckles of the ladder according to an embodiment of the present invention.

[0059] As Figures 1 to 7As shown together, the retractable and foldable ladder provided by the present invention includes: a retractable ladder body, a telescopic mechanism 3 connected to the retractable ladder body, a folding mechanism 2, and a hook 1. Among them, the telescopic mechanism 3 includes two sections, and both between the retractable ladder body and the telescopic mechanism 3 and between the two sections of the telescopic mechanism 3 are connected by the folding mechanism 2; the hook 1 is arranged at the front end of the telescopic mechanism 3 and is fixed to different steel section shapes; the retractable ladder body includes an upper retractable ladder column 4 connected to the telescopic mechanism 3 through the folding mechanism 2, a lower retractable ladder column 7 connected to the upper retractable ladder column 4, a movable buckle 6 for fixing the upper retractable ladder column 4 and the lower retractable ladder column 7, and ladder steps 5 respectively arranged on the upper retractable ladder column 4 and the lower retractable ladder column 7.

[0060] The present invention is applicable to the personnel climbing operations in various complex environments. For example, for steel plate shear walls, parapets, H-shaped steel, I-shaped steel, box girders, etc., the ladder can be fixed by adjusting the folding mechanism 2, telescopic mechanism 3, and the hook 1 at the top of the ladder.

[0061] In the present invention, the telescopic structure 3 includes a first telescopic mechanism and a second telescopic mechanism, and the folding mechanism 2 includes a first folding mechanism and a second folding structure. Among them, the top of the upper retractable ladder column 4 is fixed to the lower end of the first folding mechanism, the upper end of the first folding mechanism is fixed to the lower end of the first telescopic mechanism, the upper end of the first telescopic mechanism is fixed to the lower end of the second folding mechanism, the upper end of the second folding mechanism is fixed to the lower end of the second telescopic mechanism, the upper end of the second telescopic mechanism is fixed with the hook 1, and the ladder column, folding mechanism 2, telescopic mechanism 3, and hook 1 are all fixed by welding.

[0062] In Figure 2 In the shown embodiment, when the ladder is applied to the top of a steel plate shear wall, the first folding mechanism and the second folding mechanism can be kept in an open state of 180°, and the top hook is used to fix to the steel plate shear wall.

[0063] In Figure 3 In the shown embodiment, when the ladder is applied to H-shaped steel or I-shaped steel, the second folding mechanism can be rotated to a folded state of 90°, the first folding mechanism is kept in an open state of 180°, the second telescopic mechanism acts on the upper flange of the H-shaped steel or I-shaped steel, and the top hook 1 is fixed to the edge of the upper flange.

[0064] In Figure 4 In the shown embodiment, when the ladder is applied to a parapet or a box girder, the first folding mechanism and the second folding mechanism are rotated to a folded state of 90°, the second telescopic mechanism acts on the side surface of the box girder or parapet, and the first telescopic mechanism acts on the upper surface of the box girder or parapet to achieve fixation.

[0065] InFigure 5 In the illustrated embodiment, the folding mechanism 2 includes an upper folding block 21, a lower folding block 23, a folding rotating shaft 22, a folding movable bolt 25 disposed between the upper folding block 21 and the lower folding block 23, a fixing ring 24, and a connecting rope 26.

[0066] Among them, the folding mechanism 2 has a 180° open state and a 90° folding state. The folding rotating shaft 22 is used to rotate the folding mechanism 2 from one working state to another; fixing holes are provided between the upper folding block 21 and the lower folding block 23, and the folding movable bolt 25 is disposed in the fixing holes. The fixing ring 24 is disposed on the upper folding block 21 or the lower folding block 23, and two ends of the connecting rope 26 are respectively connected to the folding movable bolt 25 and the fixing ring 24.

[0067] Among them, when the folding mechanism 2 is switched between two working states, the folding movable bolt 25 is pulled out from the fixing hole; the upper folding block 21 and the lower folding block 23 are rotated to another working state through the folding rotating shaft 22; the folding movable bolt 25 is inserted into the fixing hole to complete the conversion of the working state. Moreover, when the folding movable bolt 25 is pulled out, it can be fixed on the folding mechanism 2 through the fixing ring 24 and the connecting rope 26 to prevent loss.

[0068] In Figure 6 the illustrated embodiment, the telescopic mechanism 3 includes a telescopic housing 31, a telescopic inner rod 32 adapted to the telescopic housing 31, and a pressable button 33 for adjusting the relative positions of the telescopic housing 31 and the telescopic inner rod 32. Among them, a hollow structure for accommodating the telescopic movement of the telescopic inner rod 32 is provided inside the telescopic housing 31, through holes adapted to the pressable button 33 are respectively provided on the telescopic housing 31 and the telescopic inner rod 32, and the pressable button 33 is fixed in the corresponding through holes of the telescopic housing 31 and the telescopic inner rod 32.

[0069] Among them, the pressable button 33 includes a fixed circular shell 331 disposed in the through hole of the telescopic inner rod, a button cap 333 disposed in the through hole of the telescopic housing 31, and a spring 332. One end of the spring 332 is fixed on the button cap 333, and the other end is fixed on the fixed circular shell 331.

[0070] Among them, when adjusting the relative position between the telescopic housing 31 and the telescopic inner rod 32, by pressing the button cap 333, the relative position between the telescopic housing 31 and the telescopic inner rod 32 is adjusted; when the relative position between the telescopic housing 31 and the telescopic inner rod 32 is adjusted to a preset relative position, the button cap 333 is released; under the action of the spring 332, the button cap 333 rebounds again and fixes the telescopic housing 31 and the telescopic inner rod 32, completing the length adjustment of the telescopic mechanism 3.

[0071] Among them, when adjusting the relative position between the telescopic housing 31 and the telescopic inner rod 32, in specific applications, it can be adjusted manually according to needs, and no specific limitation is made here.

[0072] In Figure 7 In the illustrated embodiment, the ladder step 5 includes an upper ladder beam 52 and a lower ladder beam 54. Among them, an upper ladder beam anti-slip pad 51 is provided on the upper ladder beam 52, and a lower ladder beam anti-slip pad 54 is provided on the lower ladder beam 54.

[0073] Among them, the ladder column movable buckle 6 includes a buckle 63, a buckle movable pin 61 and a buckle rotating shaft 62 provided on the buckle 63, and a buckle fixing block 64 for fixing the buckle movable pin 61.

[0074] Among them, slide rails are respectively provided on the upper telescopic ladder column 4 and the lower telescopic ladder column 7, and the length of the telescopic ladder body is adjusted through the slide rails; when adjusting the length of the telescopic ladder body, the buckle movable pin 61 is pulled out from the buckle 63; the buckle 63 is rotated through the buckle rotating shaft 62, and the relative positions of the upper telescopic ladder column 4 and the lower telescopic ladder column 7 are adjusted through the slide rails; when the upper telescopic ladder column 4 and the lower telescopic ladder column 7 slide to a preset position, the upper ladder beam 52 and the lower ladder beam 54 located at the position of the buckle 63 are aligned, and the buckle 63 is rotated to be fixed at the ladder beam. The upper ladder beam 52 and the lower ladder beam 54 are fixed on the same horizontal plane, thereby fixing the telescopic ladder body, and completing the length adjustment of the telescopic ladder body.

[0075] As can be seen from the above technical solutions, the retractable and foldable climbing ladder provided by the present invention can be used for steel plate shear walls with different thicknesses, H-shaped steel with different cross-sections, box girders, etc. This retractable and foldable climbing ladder not only solves the problem of the climbing ladder being welded to the steel beam and thus affecting the damage of the steel beam, but also reduces the construction difficulty, improves the construction flexibility, reduces the construction cost, and ensures the safety of construction personnel.

[0076] The above are only alternative embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields shall be included within the patent protection scope of the present invention.

Claims

1. A telescopic and foldable ladder, characterized in that, Comprising: A telescopic ladder body, a telescopic mechanism, a folding mechanism and a hook connected to the telescopic ladder body. Among them, The telescopic mechanism includes two sections, and the telescopic ladder body is connected to the telescopic mechanism, and the two sections of the telescopic mechanism are connected by the folding mechanism; The hook is arranged at the front end of the telescopic mechanism and fixed to different steel section shapes; The telescopic ladder body includes an upper telescopic ladder column connected to the telescopic mechanism through the folding mechanism, a lower telescopic ladder column connected to the upper telescopic ladder column, a movable buckle for fixing the upper telescopic ladder column and the lower telescopic ladder column, and ladder steps respectively arranged on the upper telescopic ladder column and the lower telescopic ladder column.

2. The retractable and foldable ladder according to claim 1, characterized in that, The folding mechanism includes an upper folding block, a lower folding block, a folding rotating shaft, and a folding movable pin arranged between the upper folding block and the lower folding block; among them, The folding mechanism has a 180° open state and a 90° folding state, and the folding rotating shaft is used to rotate the folding mechanism from one working state to another working state; A fixing hole is arranged between the upper folding block and the lower folding block, and the folding movable pin is arranged in the fixing hole.

3. The retractable and foldable ladder according to claim 2, wherein, The folding mechanism further includes a fixing ring and a connecting rope, among which, The fixing ring is arranged on the upper folding block or the lower folding block, and the two ends of the connecting rope are respectively connected to the folding movable pin and the fixing ring.

4. The retractable and foldable ladder according to claim 3, wherein, When the folding mechanism is switched between two working states, the folding movable pin is pulled out from the fixing hole; The upper folding block and the lower folding block are rotated to another working state through the folding rotating shaft; The folding movable pin is inserted into the fixing hole to complete the conversion of the working state.

5. The retractable and foldable ladder according to claim 1, characterized in that, The telescopic mechanism includes a telescopic outer shell, a telescopic inner rod adapted to the telescopic outer shell, and a pressable button for adjusting the relative position of the telescopic outer shell and the telescopic inner rod. Among them, A hollow structure for accommodating the telescopic movement of the telescopic inner rod is arranged inside the telescopic outer shell, through holes adapted to the pressable button are respectively arranged on the telescopic outer shell and the telescopic inner rod, and the pressable button is fixed in the corresponding through holes of the telescopic outer shell and the telescopic inner rod.

6. The retractable and foldable ladder according to claim 5, wherein The pressable button includes a fixed round shell arranged in the through hole of the telescopic inner rod, a button cap arranged in the through hole of the telescopic outer shell, and a spring, among which, One end of the spring is fixed on the button cap, and the other end is fixed on the fixed round shell.

7. The retractable and foldable ladder according to claim 6, wherein, When adjusting the relative position of the telescopic outer shell and the telescopic inner rod, By pressing the button cap, the relative position between the telescopic outer shell and the telescopic inner rod is adjusted; When the relative position between the telescopic outer shell and the telescopic inner rod is adjusted to a preset relative position, the button cap is released; Under the action of the spring, the button cap rebounds again and fixes the telescopic outer shell and the telescopic inner rod to complete the length adjustment of the telescopic mechanism.

8. The retractable and foldable ladder according to claim 1, wherein The ladder step includes an upper ladder beam and a lower ladder beam, among which, An upper ladder beam anti-slip pad is arranged on the upper ladder beam, and a lower ladder beam anti-slip pad is arranged on the lower ladder beam.

9. The retractable and foldable climbing ladder according to claim 8, characterized in that, The movable buckle includes a buckle, a buckle movable bolt and a buckle rotating shaft arranged on the buckle, and a buckle fixing block for fixing the buckle movable bolt.

10. The retractable and foldable ladder according to claim 9, wherein, Sliding rails are respectively arranged on the upper telescopic ladder column and the lower telescopic ladder column, and the length of the telescopic ladder body is adjusted through the sliding rails; When adjusting the length of the telescopic ladder body, pull out the buckle movable bolt from the buckle; Rotate the buckle through the buckle rotating shaft, and adjust the relative positions of the upper telescopic ladder column and the lower telescopic ladder column through the sliding rails; When the upper telescopic ladder column and the lower telescopic ladder column slide to a preset position, align the upper ladder beam and the lower ladder beam at the position of the buckle, and rotate the buckle to the ladder beam for fixation.

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