Folding ladder stand

Abstract

The utility model discloses a folding ladder stand which comprises a first installation frame, a pair of fixing seats are installed on the first installation frame, a ladder stand body is installed between the pair of fixing seats, the ladder stand body comprises a pair of ladder beams, a plurality of foot bars are fixedly connected between the pair of ladder beams, and strip-shaped holes are formed in the pair of fixing seats. Strip-shaped holes are formed in the ladder beams, first connecting columns matched with the strip-shaped holes are fixedly connected to the ladder beams, the first connecting columns are inserted into the strip-shaped holes and can slide up and down in the strip-shaped holes, limiting pieces matched with the ladder beams are fixedly connected to the first mounting frames and comprise limiting columns, through holes matched with the limiting columns are formed in the lower ends of the ladder beams, and the limiting columns can slide up and down in the through holes. When the limiting columns are inserted into the through holes in the lower ends of the ladder beams and the lower end faces of the ladder beams make contact with the inner surface of the first mounting frame, the crawling ladder can be completely contained in the first mounting frame. Compared with the prior art, the angle of the crawling ladder can be adjusted, the crawling ladder can be stored and folded, flexibility and convenience are achieved, labor is saved when a worker climbs to the top of the box body, and safety is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of container accessories, in particular to a folding ladder. Background Art

[0002] During the installation and commissioning phase or routine maintenance of containerized integrated sewage treatment equipment, workers need to climb to the top of the container for inspection. A straight ladder welded on the container is generally used to climb to the top of the container. Since the ladder is vertical to the ground and close to the container, the leg space is limited. It is laborious and unsafe for workers to use the ladder welded on the container to climb to the top of the container.

[0003] Therefore, in view of the above-mentioned technical problems, it is necessary to provide a folding ladder. Utility Model Content

[0004] The purpose of the utility model is to provide a folding ladder which can solve the above problems.

[0005] In order to achieve the above purpose, the technical solution provided by a specific embodiment of the utility model is as follows:

[0006] A folding ladder comprises a first mounting frame, a pair of fixing seats are mounted on the first mounting frame, a ladder is mounted between the pair of fixing seats, the ladder comprises a pair of ladder beams, a plurality of pedals are fixedly connected between the pair of ladder beams, strip holes are provided on the pair of fixing seats, a first connecting column matching the strip holes is fixedly connected to the ladder beams, the first connecting column is inserted into the strip holes, the first connecting column can slide up and down in the strip holes, and a limiting piece matching the ladder beams is fixedly connected to the first mounting frame.

[0007] In one or more embodiments of the present utility model, the limiting member includes a limiting column, and a through hole matching the limiting column is formed at the lower end of the ladder beam.

[0008] In one or more embodiments of the present invention, when the limiting column is inserted into the through hole at the lower end of the ladder beam and the lower end surface of the ladder beam contacts the inner surface of the first installation frame, the ladder can be completely received in the first installation frame.

[0009] In one or more embodiments of the utility model, a pair of second installation frames are fixedly connected to a pair of ladder beams, a pair of second installation frames have openings facing the pedals, and a pair of second installation frames are rotatably connected to handrails.

[0010] In one or more embodiments of the present invention, a pair of third through holes are opened on the second mounting frames, a pair of fourth through holes corresponding to the third through holes are opened on the handrail, and fixing pins are inserted into the third through holes and the fourth through holes.

[0011] In one or more embodiments of the present invention, the height of the handrail is greater than one third of the height of the ladder beam and less than one half of the height of the ladder beam.

[0012] In one or more embodiments of the present invention, a locking assembly matching the handrail is fixedly connected to the ladder beam.

[0013] In one or more embodiments of the present utility model, the locking assembly includes a shell, a telescopic slot and a fifth through hole are opened in the shell, the fifth through hole is connected to the telescopic slot, a second connecting column is slidably connected in the fifth through hole, the upper end of the second connecting column is fixedly connected to a baffle, and the baffle is slidably connected in the telescopic slot, a number of springs are installed between the lower end of the baffle and the slot wall of the telescopic slot, and the lower end of the second connecting column is fixedly connected to a gripper.

[0014] In one or more embodiments of the present invention, the upper end of the baffle is an arc-shaped portion matching the handrail.

[0015] In one or more embodiments of the utility model, a plurality of first through holes are formed on the first mounting frame, a pair of the fixing seats are each formed with a plurality of second through holes matching the first through holes, bolts are inserted into the plurality of first through holes and the second through holes, and nuts are threadedly connected to the bolts.

[0016] Compared with the prior art, the utility model can adjust the angle of the ladder, can be folded and stored, is flexible and convenient, saves labor when workers climb to the top of the box, and has high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the structure of the foldable ladder in one embodiment of the utility model when it is stored;

[0019] Figure 2 In one embodiment of the utility model Figure 1 Schematic diagram of the structure at A in the middle;

[0020] Figure 3 In one embodiment of the utility model Figure 1 Schematic diagram of the structure at B in the middle;

[0021] Figure 4This is a structural schematic diagram of a foldable ladder in one embodiment of the utility model when in use;

[0022] Figure 5 In one embodiment of the utility model Figure 4 Schematic diagram of the structure at C in the middle;

[0023] Figure 6 This is a first partial exploded view of a folding ladder in one embodiment of the utility model;

[0024] Figure 7 In one embodiment of the utility model Figure 6 Schematic diagram of the structure at D in the middle;

[0025] Figure 8 This is a second partial exploded view of the folding ladder in one embodiment of the utility model;

[0026] Fig. 9 In one embodiment of the utility model Figure 8 Schematic diagram of the structure at E in the middle;

[0027] Fig.10 It is a half-section view of a locking assembly in one embodiment of the utility model.

[0028] Description of main reference numerals:

[0029] 1-first mounting frame, 101-first through hole, 2-fixing seat, 201-strip hole, 202-second through hole, 301-ladder beam, 302-pedal rod, 4-first connecting column, 5-second mounting frame, 501-third through hole, 6-handrail, 601-fourth through hole, 7-fixing pin, 8-locking assembly, 801-baffle, 802-second connecting column, 803-telescopic slot, 804-spring, 805-fifth through hole, 806-grip, 807-housing, 9-limiting column, 10-bolt, 11-nut. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0031] like Figure 1 , Figure 6 and Figure 7As shown, a folding ladder in one embodiment of the utility model comprises a first mounting frame 1, a pair of fixing seats 2 are installed on the inner side of the first mounting frame 1, a plurality of first through holes 101 are opened on the first mounting frame 1, a plurality of second through holes 202 matching the first through holes 101 are opened on the pair of fixing seats 2, bolts 10 are inserted into the first through holes 101 and the second through holes 202, and nuts 11 are threadedly connected to the bolts 10. That is, the fixing seats 2 and the first mounting frame 1 are connected together by bolts, which is convenient for replacement and maintenance of the folding ladder.

[0032] like Figure 1 and Figure 2 As shown, a ladder is installed between a pair of fixed seats 2, and the ladder includes a pair of ladder beams 301, and the ladder beams 301 are square tube structures. A plurality of step rods 302 are uniformly welded between the pair of ladder beams 301. The pair of fixed seats 2 are each provided with a strip hole 201, and the ladder beams 301 are fixedly connected with a first connecting column 4 matching the strip hole 201. The first connecting column 4 is inserted into the strip hole 201, and the first connecting column 4 can slide up and down in the strip hole 201, that is, the ladder is limited to vertical displacement only in the strip hole 201. Specifically, the first connecting column 4 and the strip hole 201 are interference fit, so that the folding ladder can be rotated around the central axis of the first connecting column 4, laying a foundation for the working use of the folding ladder.

[0033] like Figure 1 , Figure 2 and Figure 4 As shown, a limiting column 9 matching the ladder beam 301 is welded to the inner surface of the first mounting frame 1. The ladder beam 301 is a square tube structure. The diameter of the horizontal projection of the limiting column 9 is smaller than the tube diameter of the ladder beam 301. In other words, the diameter of the upper surface of the limiting column 9 is smaller than the tube diameter of the ladder beam 301, so that the limiting column 9 can be inserted into the ladder beam 301, that is, the lower end of the ladder beam 301 is restricted and fixed by the limiting column 9.

[0034] Preferably, when the limiting column 9 is inserted into the ladder beam 301 and the lower end surface of the ladder beam 301 contacts the inner surface of the first installation frame 1, the ladder beam 301 is perpendicular to the horizontal plane, and the distance between the groove wall of the strip hole 201 away from the limiting column 9 and the first connecting column 4 is greater than the height of the limiting column 9 and less than two-thirds of the height of the limiting column 9. That is, when the folding ladder is to be stored, the strip hole 201 leaves enough margin for the vertical upward displacement of the folding ladder, and by sliding the first connecting column 4 vertically upward in the strip hole 201, space is guaranteed for the lower end pipe opening of the ladder beam 301 to accommodate the limiting column 9, thereby facilitating the storage of the folding ladder, and the operation is simple and time-saving.

[0035] like Figure 1 to Figure 5As shown, in order to facilitate the staff to climb on the folding ladder, a pair of second mounting frames 5 are welded on each of the pair of ladder beams 301, and each of the pair of second mounting frames 5 has an opening facing the pedal rod 302, and a handrail 6 is rotatably connected in the pair of second mounting frames 5. That is, when climbing the folding ladder, the handrail 6 can assist the user to move up and down. In addition, the second mounting frame 5 limits the rotation space of the handrail 6, so that the handrail 6 can only rotate from parallel to the pedal rod 302 to perpendicular to the pedal rod 302 or from perpendicular to the pedal rod 302 to parallel to the pedal rod 302.

[0036] Preferably, the pair of second mounting frames 5 are both arranged above the center line of the ladder beam 301, so that when the foldable ladder is stored, the user only needs to stand upright on the ground to adjust the locking and opening of the handrail 6 by hand. In addition, those skilled in the art should realize that the center line of the ladder beam 301 is located in a horizontal plane on the ladder beam 301 at a height of half the ladder beam 301 from the lower end surface.

[0037] Specifically, Figure 8 and Fig. 9 As shown, a pair of second mounting frames 5 are provided with third through holes 501, and a pair of fourth through holes 601 corresponding to the third through holes 501 are provided on the handrail 6. The third through holes 501 and the fourth through holes 601 are inserted with fixing pins 7, that is, the handrail 6 completes a 90-degree rotation around the central axis of the fixing pin 7. The handrail 6 is a circular tube structure, and the opening height of the second mounting frame 5 is greater than the outer diameter of the handrail 6, that is, the second mounting frame 5 and the handrail 6 are interference fit, so that the handrail 6 can smoothly rotate around the fixing pin 7. When using the folding ladder, the handrail 6 is rotated to the side away from the step rod 302, and when the folding ladder is stored, the handrail 6 is rotated to the side close to the step rod 302.

[0038] Preferably, the height of the handrail 6 is greater than one-third of the height of the ladder beam 301 and less than one-half of the height of the ladder beam 301, and the lower end of the handrail 6 is higher than the center line of the ladder beam 301. If the handrail 6 is too long or too large, it will waste materials and increase manufacturing costs. Figure 1 As shown, the height of the handrail 6 is the vertical length of the handrail 6 in the figure, the height of the ladder beam 301 is the vertical length of the ladder beam 301 in the figure, and the center line of the ladder beam 301 is located in a horizontal plane on the ladder beam 301 that is half the height of the ladder beam 301 from the lower end surface.

[0039] like Figure 4 As shown, a locking assembly 8 matching the handrail 6 is welded on the ladder beam 301. Specifically, the locking assembly 8 is arranged on the lower side of the second mounting frame 5 close to the limiting column 9, and the upper end surface of the locking assembly 8 contacts the lower end surface of the second mounting frame 5. That is, the locking and opening of the handrail 6 can be adjusted by the locking assembly 8.

[0040] like Fig.10As shown, the locking assembly 8 includes a baffle 801, a second connecting column 802, a telescopic slot 803, a spring 804, a fifth through hole 805, a gripper 806 and a housing 807. The fifth through hole 805 is in communication with the telescopic slot 803, and the second connecting column 802 is slidably connected in the fifth through hole 805, that is, the second connecting column 802 is inserted in the fifth through hole 805, and the second connecting column 802 and the fifth through hole 805 are interference fit, and the second connecting column 802 can slide up and down in the fifth through hole 805.

[0041] like Figure 1 , Figure 4 and Fig.10 As shown, a baffle 801 is welded to the upper end of the second connecting column 802, and the baffle 801 and the telescopic slot 803 are interference fit, and the baffle 801 can slide up and down in the telescopic slot 803. The upper end of the baffle 801 is an arc-shaped portion that matches the armrest 6. Specifically, its cross-section is semicircular, so that it is convenient to press the baffle 801 to move downward when the armrest 6 rotates. If the upper part of the baffle 801 is not a roughly arc-shaped portion, if it is a cylinder or a cuboid, then when the armrest 6 rotates, it will not be possible to press the baffle 801 to complete the vertical descent of the locking assembly 8, that is, the armrest 6 cannot be used.

[0042] A plurality of springs 804 are installed between the lower end of the baffle 801 and the wall of the telescopic slot 803. The springs 804 can ensure that the baffle 801 is restored to its original position after the armrest 6 is switched from the storage state to the use state, thereby locking the armrest 6 and ensuring that the armrest 6 will not rotate in the direction close to the pedal 302, thereby ensuring safe use by the staff to a certain extent.

[0043] A gripper 806 is welded to the lower end of the second connecting column 802. The gripper 806 ensures that the baffle 801 will not be separated from the housing 807 due to gravity, and facilitates the handrail 6 to be transferred from the use state to the storage state. By grabbing the gripper 806, the baffle 801 is moved vertically downward and retracted into the telescopic groove 803, the handrail 6 is unlocked, and the handrail 6 is rotated from perpendicular to the pedal rod 302 to parallel to the pedal rod 302 to complete the storage of the folding ladder.

[0044] In order to facilitate the rotation of the handrail 6, preferably, when the upper surface of the grip 806 is in close contact with the lower surface of the shell 807 and the spring 804 is in a natural state, the height of the portion of the baffle 801 protruding from the shell 807 is less than half of the diameter of the handrail 6. Specifically, with the upper surface of the shell 807 as the reference plane, the distance from the horizontal plane at the highest point of the baffle 801 to the upper surface of the shell 807 is less than half of the diameter of the handrail 6. When the distance from the horizontal plane at the highest point of the baffle 801 to the upper surface of the shell 807 is too large, the arc segment of the baffle 801 protruding from the shell 807 will not function, and the rectangular parallelepiped segment of the baffle 801 protruding from the shell 807 will block the rotation of the handrail 6.

[0045] When used specifically, Figure 1 Convert to Figure 4 As shown, the folding ladder is turned from the storage state to the use state. Grab the ladder beam 301 and move it vertically upward, and the vertical upward displacement height is higher than the height of the limit column 9, and at the same time rotate around the central axis of the first connecting column 4 in the direction away from the first installation frame 1, and then make the lower end of the ladder beam 301 contact the ground, and finally grab the two handrails 6 and complete a 90-degree rotation in the direction away from the step rod 302; the folding ladder is turned from the use state to the storage state, that is, from Figure 4 Convert to Figure 1 As shown, one hand grasps the grip 806 to move the baffle 801 vertically downward and retract it into the telescopic slot 803, and the other hand grasps the handrail 6 to complete a 90-degree rotation toward the pedal 302, and then both hands grasp the ladder beam 301 and lift it up until it is not in contact with the ground, and rotate it around the central axis of the first connecting column 4 toward the first installation frame 1. When the ladder beam 301 is partially received by the first installation frame 1, ensure that the lower end of the ladder beam 301 is higher than the upper surface of the limit column 9, and then insert the limit column 9 into the lower end pipe opening of the ladder beam 301.

[0046] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0047] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A folding ladder, comprising a first mounting frame, characterized in that: A pair of fixing seats are installed on the first installation frame, a ladder is installed between the pair of fixing seats, the ladder includes a pair of ladder beams, a plurality of pedals are fixedly connected between the pair of ladder beams, strip holes are opened on the pair of fixing seats, a first connecting column matching the strip holes is fixedly connected to the ladder beams, the first connecting column is inserted in the strip holes, the first connecting column can slide up and down in the strip holes, and a limiting piece matching the ladder beams is fixedly connected to the first installation frame.

2. A folding ladder according to claim 1, characterized in that: The limiting member comprises a limiting column, and a through hole matching the limiting column is formed at the lower end of the ladder beam.

3. A folding ladder according to claim 2, characterized in that: When the limiting column is inserted into the through hole at the lower end of the ladder beam and the lower end surface of the ladder beam contacts the inner surface of the first installation frame, the ladder can be completely received in the first installation frame.

4. A folding ladder according to claim 1, characterized in that: A pair of second installation frames are fixedly connected to the pair of ladder beams, the pair of second installation frames have openings facing the pedal rods, and handrails are rotatably connected in the pair of second installation frames.

5. A folding ladder according to claim 4, characterized in that: A pair of third through holes are formed on the second installation frames, a pair of fourth through holes corresponding to the third through holes are formed on the handrail, and fixing pins are inserted into the third through holes and the fourth through holes.

6. A folding ladder according to claim 4, characterized in that: The height of the handrail is greater than one third of the height of the ladder beam and less than one half of the height of the ladder beam.

7. A folding ladder according to claim 1, characterized in that: A locking assembly matching the handrail is fixedly connected to the ladder beam.

8. A folding ladder according to claim 7, characterized in that: The locking assembly includes a shell, in which a telescopic slot and a fifth through hole are provided, the fifth through hole is communicated with the telescopic slot, a second connecting column is slidably connected in the fifth through hole, a baffle is fixedly connected to the upper end of the second connecting column, and the baffle is slidably connected in the telescopic slot, a plurality of springs are installed between the lower end of the baffle and the slot wall of the telescopic slot, and a gripper is fixedly connected to the lower end of the second connecting column.

9. A folding ladder according to claim 8, characterized in that: The upper end of the baffle is an arc-shaped portion matching the handrail.

10. The folding ladder according to claim 1, characterized in that: The first installation frame is provided with a plurality of first through holes, and a pair of the fixing seats are provided with a plurality of second through holes matching the first through holes. Bolts are inserted into the plurality of first through holes and the second through holes, and nuts are threadedly connected to the bolts.

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