Middle folding type climbing ladder

Abstract

The utility model discloses a middle folding type climbing ladder. The middle folding type climbing ladder comprises two supporting columns, a plurality of pedals and a connecting rod, the two supporting columns are arranged at an interval; the plurality of pedals are connected between the two supporting columns to form a ladder structure; the two ends of the pedal are hinged to the two supporting columns respectively, and the pedal is formed by hinging two first supporting plates through a pivot. The connecting rod is in positioning connection with the pivots on all the pedals; according to the utility model, the pedal can be locked and unlocked through the matching of the support locking part and the step locking part on the locking module, specifically, when the pedal is in an unfolded state, the locking module is positioned at the joint of the pedal and the support column, and then the support locking part acts on the locking point on the support column, so that the pedal can be locked and unlocked. The step locking part acts on a limiting point on the pedal, so that the rotating trend between the supporting column and the pedal is limited, and the pedal is limited in the unfolded state.

Description

Technical Field

[0001] This utility model relates to the field of climbing equipment technology, specifically to a folding climbing ladder. Background Technology

[0002] There are many types of climbing ladders, such as straight ladders and A-frame ladders, among which the straight ladder is the most common. A straight ladder, also known as an upright ladder, is a common climbing tool widely used in homes, construction sites, maintenance work, and various situations requiring temporary elevation of work positions. Traditional straight ladders are usually made of sturdy materials such as aluminum alloy, steel, or wood, and feature a simple design and reliable structure.

[0003] Traditional straight ladders are often bulky after use, making them inconvenient to carry and transport. Existing folding ladders, with their folding function, solve this problem.

[0004] A representative example is the German patent document with publication number DE202016001297U1, published on April 8, 2016, which discloses a foldable ladder. The foldable ladder consists of two longitudinal beams with step rungs. The two equal parts are connected to each other by bolts and connected to a tie rod. Two supports are hinged to the longitudinal beams, with a length exceeding the two parts of the step rungs. The bolts are parallel to each other. Supports at their upper arched ends are arranged laterally in pairs near the tie rod and are bolted together. The position and length of the two support columns match the length of the sprouting component. In the unfolded working state, the support ends of the support columns are located on the slender overlapping ladder rungs, and the tie rod is under clamping force.

[0005] Although the technical solutions provided in the aforementioned patent documents also have folding functionality, they still have limitations in practical implementation, as follows:

[0006] Although the technical solution provided in the aforementioned patent documents can be folded from the footplate, it does not have a quick locking function. In other words, the footplate and the support are constantly moving. After long-term use, the wear at the bolt connection will increase, causing the bolt to wobble in the bolt hole. That is, the legs of the ladder can easily close with just a little force. When in use, the user can stand on the footplate and press it down, but when moving the ladder to adjust its position, improper operation can easily cause a hand to be pinched, affecting the normal use of the equipment.

[0007] Therefore, how to overcome the shortcomings of the existing technology mentioned above has become the subject of this utility model. Utility Model Content

[0008] This utility model provides a folding ladder for climbing, which aims to solve the technical problems mentioned in the background art.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is: a folding ladder, comprising two support columns, multiple treads, and a connecting rod;

[0010] The two support pillars are spaced apart; the plurality of treads are connected between the two support pillars to form a ladder structure;

[0011] The two ends of the pedal are respectively hinged to the two pillars, and the pedal is composed of two first support plates hinged by a pivot.

[0012] The connecting rod is pivotally connected to all the pedals; the connecting rod is configured to drive all the pedals to unfold or fold simultaneously around the pivot, so that the ladder structure has an unfolded state and a folded state.

[0013] The climbing ladder also includes a locking module;

[0014] The locking module is provided at the connection between the pedal and the support column; the locking module includes a locking member, which has a support locking part and a step locking part;

[0015] The support column is provided with a locking point at the position corresponding to the end of the pedal, and the end of the pedal near the support column is provided with a limiting point;

[0016] When the ladder structure is in the unfolded state, the support locking part of the locking member acts on the locking point on the support column, and the step locking part of the locking member acts on the limiting point on the pedal, so as to limit the rotational tendency between the support column and the pedal; the locking member can be disassembled or moved relative to the support column to release the restriction on the support column and the pedal.

[0017] The relevant content in the above plan is explained as follows:

[0018] In the above scheme, at least two supports can be set, or three or four. When three supports are set, the third support is hinged to the uppermost step of the ladder structure. When four supports are set, the ends of the other two supports are rotatably connected to the two ends of the support at that location, forming a human-shaped ladder.

[0019] Preferably, two supports are provided.

[0020] In the above scheme, the pivot on the pedal can be set at the center of the pedal or at the end near the support. That is, there are embodiments where the two first support plates have the same shape and length, and there are embodiments where only the length is different. At the same time, when hinged, components such as pivots and rivets can be selected.

[0021] In the above solution, the locking module can be an L-shaped plate, and the support locking part and the step locking part can be two screws. In this way, the locking point and the limiting point can both be threaded holes. As long as the L-shaped plate is stuck at the connection between the pedal and the support, and the screw is fixed, the pedal can always be in the unfolded state. As long as the screw is removed and the L-shaped plate is taken away, the pedal can be folded.

[0022] In the above scheme, the locking module can also be just a ramp, with an extension at the end of the ramp that fits into the pedal. The support locking part and the step locking part can also be two screws. The pedal can be quickly unfolded and folded by the cooperation of the screws and the ramp.

[0023] In the above scheme, at least one locking module is provided, preferably two symmetrically arranged.

[0024] In a further technical solution, the locking member is slidably or rotatably disposed relative to the support column and can be positioned at a locking point on the support column.

[0025] In a further technical solution, the locking element includes a first locking plate and a connecting rod, wherein the first locking plate is configured to slide along the support column;

[0026] The first locking plate is provided with a locking member, which can lock the first locking plate at the locking point, and the locking member serves as the supporting locking part;

[0027] One end of the connecting rod is hinged to the first locking plate, while the other end is hinged to the limiting point of the pedal as a step locking part;

[0028] When the ladder structure is in the unfolded state, the first locking plate is locked at the locking point by the locking member, and the connecting rod pulls the pedals to restrict the pedals from rotating, thereby locking the ladder in the unfolded state.

[0029] The L-shaped plate and the inclined plate are less efficient when assembling and disassembling the bolts. However, with the above design, the first locking plate can be fixed simply by sliding it to a certain position.

[0030] Specifically, when the ladder moves from the folded state to the unfolded state, the steps unfold, and the unfolded steps pull the connecting rod down. Because the two ends of the connecting rod are hinged to the first locking plate and the steps, the connecting rod will move along with the steps as their position changes. Then, the descending connecting rod pulls the first locking plate to slide, that is, the first locking plate slides along the support. When it slides to a certain position, the first locking plate is locked at the locking point. The locking methods include clamping, screw fixing, etc., to realize the operation of the ladder entering the unfolded state.

[0031] If the ladder needs to be folded, the locking device is first released from the restriction of the support column and the pedal, and then the pedal is guided to fold. As the pedal folds, it will pull the connecting rod upward, so that the connecting rod pulls the first locking plate away from the locking point on the support column corresponding to the first locking plate.

[0032] A further technical solution is that the locking member has a locking operation end;

[0033] The support column is provided with a plug-in hole, which is the locking point;

[0034] When the first locking plate slides to the locking point, the locking operation end is configured to be inserted into the plug hole.

[0035] The locking element can be a screw, and the first locking plate can be fixed to the inner wall of the opposite side of the two supports in the ladder structure, or it can be set on the side of the opposite side.

[0036] Because the locking mechanism is cumbersome to hold and takes up a lot of space, it is locked by inserting it into a connector hole.

[0037] In a further technical solution, the first locking plate is provided with an alignment hole, and the locking operation end is configured to be inserted into the alignment hole;

[0038] The first locking plate is rotatably connected to the locking member, one end of the locking member is connected to the locking operation end, and the other end of the locking member is a movable end; the movable end is configured to guide the locking member to deflect around the rotatable connection point with the first locking plate as the center.

[0039] When the ladder structure is in the unfolded state, the alignment hole coincides with the insertion hole, and the locking operation end passes through the alignment hole and extends to the insertion hole.

[0040] A torsion spring is provided at the rotatable connection between the first locking plate and the locking member to keep the locking operation end in the alignment hole.

[0041] With the above design, the operator can guide the locking member to deflect around the rotation connection point with the first locking plate by simply rotating the movable end of the locking member. This allows the locking operation end to be inserted into or disengaged from the insertion hole, thereby realizing the locking and unlocking operations of the first locking plate and the support column.

[0042] In a further technical solution, the locking component includes a first locking plate and a second locking plate that are fixedly connected in an L-shape;

[0043] The first locking plate is slidably or rotatably positioned on the support column, and the first locking plate is configured to be locked and fixed at the locking point; while the second locking plate is provided with an abutting mating surface for abutting the pedal;

[0044] When the ladder structure is in the unfolded state, the first locking plate is configured to lock and fix at the locking point, and the abutting surface of the second locking plate is configured to abut against the pedal as the limiting point.

[0045] In this embodiment, by simply sliding the first locking plate to lock the locking member, the second locking plate can support the pedal when the pedal is in the unfolded state.

[0046] Meanwhile, the second locking plate and the first locking plate can be welded together, or they can be movably connected by screws or other components.

[0047] The following operations are provided for the locking method of the first locking plate and the second locking plate.

[0048] In the first embodiment, the first locking plate and the second locking plate can be L-shaped. However, the first locking plate is slidably connected to the side of the support column. Compared with the method of fixing by bolts, in this embodiment, the first locking plate does not need to be fixed with screws. Instead, the first locking plate is slid until it slides to the locking operation end on it and is inserted into the plug hole. At this time, the second locking plate abuts against the pedal, thus fixing the pedal.

[0049] The second type has a first locking plate that can rotate around the support until the second locking plate abuts against the pedal.

[0050] In summary, the locking component can be a separate L-shaped plate or a ramp. In this case, the contact between the L-shaped plate or ramp (with extension plates at both ends of the ramp) and the support and pedal is a surface contact, and they can be fixed by screws.

[0051] Secondly, the locking element can be a connection between the first locking plate and the connecting rod. In this case, the first locking plate is in contact with the support surface, and the connecting rod is in contact with the pedal point.

[0052] In a further technical solution, a track is provided on the surface of the support column, and the first locking plate is positioned on the track to slide relative to the support column.

[0053] The above design ensures that the first locking plate will not wobble when it slides.

[0054] A further technical solution, viewed from a cross-sectional perspective, is that the support includes a first horizontal plate, a first vertical plate, and a second vertical plate. The first vertical plate and the second vertical plate are symmetrically arranged and spaced apart. The first horizontal plate is positioned between the ends of the first vertical plate and the second vertical plate, and the first horizontal plate is perpendicular to the first vertical plate and the second vertical plate.

[0055] The first vertical plate, the first horizontal plate, and the second vertical plate are combined to form a first frame structure with an open surface and a hollow interior.

[0056] Within the first frame structure, a first slot is formed at the corner between the first vertical plate and the first horizontal plate; a second slot is formed at the corner between the first horizontal plate and the second vertical plate.

[0057] Within the first frame structure, the first slot and the second slot combine to form a sliding channel, which is the track.

[0058] With the above design, the first locking plate can only slide within the sliding channel and is limited by the first frame structure.

[0059] In a further technical solution, the two first support plates are symmetrically arranged with reference to the center of symmetry of the two pillars;

[0060] The surface of the first support plate is provided with a mounting groove, which is configured to accommodate the second locking plate. In order to put the pedal into a folded state, the two first support plates rotate about their pivots as the deflection center until the two mounting grooves are opposite each other.

[0061] With the above design, the second locking plate is hidden in the mounting slot when the pedal is in the folded state.

[0062] Further technical solutions,

[0063] Viewed from a cross-sectional perspective, the first support plate includes a first longitudinal plate, a first transverse plate, and a second longitudinal plate;

[0064] One end of the first horizontal plate is integrally connected to the end of the second vertical plate;

[0065] The other end surface of the first horizontal plate is integrally connected to the end of the first vertical plate;

[0066] The first longitudinal plate, the first transverse plate, and the second longitudinal plate are combined to form a second frame structure. The second frame structure has a groove with an opening, which is the mounting groove.

[0067] The lengths of the first longitudinal support plate and the second longitudinal support plate are both greater than the length of the first transverse support plate, so that the two ends of the first longitudinal support plate and the two ends of the second longitudinal support plate extend beyond the end of the first transverse support plate.

[0068] When the pedal is in the unfolded state, the opposite ends of the two first support plates abut against each other and the cross-sectional projections of the two first support plates coincide.

[0069] Thanks to the above design, the pedals are integrated when unfolded, with no protrusions at the edges, resulting in a good aesthetic appearance.

[0070] A further technical solution is that each of the two first support plates has a rectangular groove at one of its opposite ends, and the two rectangular grooves are combined to form a quadrilateral hole;

[0071] The connecting rod is disposed in the quadrilateral hole, and the pivot passes through the connecting rod.

[0072] The above design allows the connecting rod to be hidden, so that it can also be concealed when storing the folding ladder.

[0073] Further technical solutions,

[0074] The length of the connecting rod is greater than the height of the stacked structure formed by the combination of multiple pedals, so that the end of the connecting rod extends beyond the stacked structure and forms an operating section;

[0075] Two support rods are rotatably connected to the side of the operating section, and the two support rods are symmetrically arranged with reference to the center of symmetry of the two pillars; a guide sliding hole is provided at the rotatable connection between the surface of the operating section and the two support rods.

[0076] Furthermore, the ends of the two support rods that are far apart from each other are rotatably connected to the two pillars respectively.

[0077] The above design allows the connecting rod to simultaneously unfold or fold all the pedals. When unfolding, the support rods stabilize the operating section of the connecting rod, preventing damage to the pedals. When folding, the pedals fold, and the rotating connection between the two support rods slides within the guide holes, ensuring the upward movement of the connecting rod is unaffected. This is because folding requires pushing the connecting rod upwards to fold all the pedals, while unfolding requires pulling the connecting rod downwards to unfold the pedals.

[0078] Further technical solutions,

[0079] The internal width of the first frame structure, the width of the first support plate, and the width of the second locking plate are set in a decreasing order.

[0080] With the above design, the first support plate can be hidden inside the first frame structure, and the second locking plate can be hidden inside the first support plate.

[0081] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0082] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0083] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0084] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing this case.

[0085] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0086] The working principle and advantages of this utility model are as follows:

[0087] In this invention, the pedal can be locked and unlocked by the cooperation of the support locking part and the step locking part on the locking module. Specifically, when the pedal is in the unfolded state, the locking module is positioned at the connection between the pedal and the support column. Then, the support locking part acts on the locking point on the support column, and the step locking part acts on the limiting point on the pedal, so as to limit the rotational tendency between the support column and the pedal, thereby restricting the pedal in the unfolded state. When the pedal is in the folded state, the support locking part is guided to disengage from the locking point, and the step locking part is guided to disengage from the limiting point, so as to release the restriction on the support column and the pedal.

[0088] In this invention, the support locking part and the step locking part can restrict the support column and the step, so that the step will not fold through the pivot. After the support column is restricted, the entire step can also be prevented from tilting and folding with the support column. Compared with the bolt fixing method in the prior art, the locking module provided in this invention can restrict the support column and the step at the same time. When locking, the operation is simple and quick. When unlocking, the support locking part can be separated from the support column, reducing friction between the support column and the support column. Attached Figure Description

[0089] Appendix Figure 1 This is a schematic diagram of the structure of the pedal in this embodiment of the present invention when it changes from the unfolded state to the folded state;

[0090] Appendix Figure 2 This is a schematic diagram of the structure of the pedal in the unfolded state in an embodiment of the present invention;

[0091] Appendix Figure 3 This is a schematic diagram of the structure of the support column during storage in an embodiment of this utility model;

[0092] Appendix Figure 4 This is a schematic diagram of the guide sliding hole structure in an embodiment of the present utility model;

[0093] Appendix Figure 5 for Figure 4 Schematic diagram of the structure at the EE point;

[0094] Appendix Figure 6 for Figure 2 Schematic diagram of the structure at the FF point;

[0095] Appendix Figure 7 This is a schematic diagram of the structure when the support locking part is inserted into the insertion hole in an embodiment of this utility model;

[0096] Appendix Figure 8 This is a schematic diagram of the structure of the support locking part disengaging from the insertion hole in an embodiment of the present utility model;

[0097] Appendix Figure 9 This is a top view of the locking component in an embodiment of the present utility model;

[0098] Appendix Figure 10 This is a schematic diagram of the cross-sectional structure of the locking member in an embodiment of the present utility model;

[0099] Appendix Figure 11 This is a top view of the first support plate in an embodiment of the present invention;

[0100] Appendix Figure 12 This is a bottom view of the first support plate structure in an embodiment of this utility model;

[0101] Appendix Figure 13 This is a schematic diagram of the rectangular groove structure in an embodiment of the present utility model;

[0102] Appendix Figure 14 This is a schematic diagram of the second frame structure in an embodiment of the present utility model.

[0103] In the above attached figures: 1. Support column; 2. Pedal; 3. Connecting rod; 4. Pivot; 5. Locking module; 6. Support locking part; 7. Step locking part; 8. First locking plate; 9. Locking element; 10. Alignment hole; 11. Insertion hole; 12. Guide slide hole; 13. Track; 14. First horizontal plate; 15. First vertical plate; 16. Second vertical plate; 17. First frame structure; 18. First slot; 19. Second slot; 20. First support plate; 21. Mounting groove; 22. First vertical support plate; 23. First horizontal support plate; 24. Second vertical support plate; 25. Second frame structure; 26. Rectangular groove; 27. Quadrilateral hole; 28. Support rod; 29. ​​Restraint element. Detailed Implementation

[0104] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0105] Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0106] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0107] See appendix Figures 1-14 As shown, a folding ladder includes two support columns 1, multiple treads 2, and a connecting rod 3;

[0108] The two support pillars 1 are spaced apart; the plurality of treads 2 are connected between the two support pillars 1 to form a ladder structure;

[0109] The two ends of the pedal 2 are respectively hinged to the two support columns 1, and the pedal 2 is composed of two first support plates 20 hinged together by a pivot 4;

[0110] The connecting rod 3 is positioned and connected to the pivot 4 on all the pedals 2; the connecting rod 3 is configured to drive all the pedals 2 to unfold or fold simultaneously with the pivot 4 as the rotation center, so that the ladder structure has an unfolded state and a folded state;

[0111] The climbing ladder also includes a locking module 5;

[0112] The locking module 5 is provided at the connection between the pedal 2 and the support column 1; the locking module 5 includes a locking member, which has a support locking part 6 and a step locking part 7;

[0113] The support column 1 is provided with a locking point at the corresponding position of the end of the pedal 2, and the pedal 2 has a limiting point at the end near the support column 1;

[0114] When the ladder structure is in the unfolded state, the support locking part 6 of the locking member acts on the locking point on the support column 1, and the step locking part 7 of the locking member acts on the limiting point on the pedal 2, so as to limit the rotational tendency between the support column 1 and the pedal 2; the locking member can be disassembled or moved relative to the support column 1 to release the restriction on the support column 1 and the pedal 2.

[0115] In this embodiment, at least two support columns 1 are provided, and three or four can also be provided. When three support columns 1 are provided, the third support column 1 is hinged to the uppermost step 2 of the ladder structure. When four support columns 1 are provided, the ends of the other two support columns 1 are rotatably connected to the two ends of the support column 1 at this location, and the combination forms a A-frame ladder.

[0116] Preferably, two support pillars 1 are provided.

[0117] In this embodiment, the pivot 4 on the pedal 2 can be set at the center of the pedal 2 or at the end near the support 1. That is, there are embodiments where the two first support plates 20 have the same shape and length, and there are embodiments where only the length is different. At the same time, when hinged, components such as pivots and rivets can be selected.

[0118] In this embodiment, the locking module 5 can be an L-shaped plate, and the support locking part 6 and the step locking part 7 can be two screws. In this way, the locking point and the limiting point can both be threaded holes. As long as the L-shaped plate is stuck at the connection between the pedal 2 and the support column 1, and the screw is fixed, the pedal 2 can always be in the unfolded state. As long as the screw is removed and the L-shaped plate is taken away, the pedal 2 can be folded.

[0119] In this embodiment, the locking module 5 can also be just a ramp, with an extension at the end of the ramp that fits into the pedal 2. The support locking part 6 and the step locking part 7 can also be two screws. The expansion and folding of the pedal 2 can be quickly achieved by the cooperation of the screws and the ramp.

[0120] In this embodiment, at least one locking module 5 is provided, preferably two symmetrically arranged.

[0121] In this invention, the pedal 2 can be locked and unlocked by the cooperation of the support locking part 6 and the step locking part 7 on the locking module 5. Specifically, when the pedal 2 is in the unfolded state, the locking module 5 is positioned at the connection between the pedal 2 and the support column 1. Then, the support locking part 6 acts on the locking point on the support column 1, and the step locking part 7 acts on the limiting point on the pedal 2, so that the rotation tendency between the support column 1 and the pedal 2 is limited, thus limiting the pedal 2 in the unfolded state. When the pedal 2 is in the folded state, the support locking part 6 is guided to disengage from the locking point, and the step locking part 7 is guided to disengage from the limiting point, so as to release the restriction on the support column 1 and the pedal 2.

[0122] In this embodiment, after the support column 1 is folded, the two support columns 1 can be wrapped and fixed by fasteners 29 such as Velcro or ropes.

[0123] In a further technical solution, the locking member is slidably or rotatably disposed relative to the support column 1, and can be positioned at a locking point on the support column 1.

[0124] In a further technical solution, the locking component includes a first locking plate 8 and a connecting rod, wherein the first locking plate 8 is configured to slide along the support column 1;

[0125] The first locking plate 8 is provided with a locking member 9, which can lock the first locking plate 8 at the locking point. The locking member 9 serves as the support locking part 6.

[0126] One end of the connecting rod is hinged to the first locking plate 8, while the other end is hinged to the limiting point of the pedal 2 as a step locking part 7.

[0127] When the ladder structure is in the unfolded state, the first locking plate 8 is locked at the locking point by the locking member 9, and the connecting rod pulls the pedal 2 to restrict the rotation of the pedal 2 in order to lock the unfolded state of the ladder.

[0128] The L-shaped plate and the inclined plate are less efficient when disassembling and reassembling the bolts. However, with the above design, the first locking plate 8 can be fixed simply by sliding it to a certain position.

[0129] Specifically, when the ladder moves from the folded state to the unfolded state, the footplate 2 unfolds, and the unfolded footplate 2 pulls the connecting rod down. Because the two ends of the connecting rod are hinged to the first locking plate 8 and the footplate 2, the connecting rod will move along with the footplate 2 as its position changes. Then, the descending connecting rod pulls the first locking plate 8 to slide, that is, the first locking plate 8 slides along the support column 1. When it slides to a certain position, the first locking plate 8 is locked at the locking point. The locking method can be clamping, screw fixing, etc., to realize the operation of the ladder entering the unfolded state.

[0130] If the ladder needs to be folded, the locking device 9 is first released from the restriction on the support column 1 and the step 2, and then the step 2 is guided to fold. As the step 2 folds, it will pull the connecting rod upward, so that the connecting rod pulls the first locking plate 8 away from the locking point on the support column 1 corresponding to the first locking plate 8.

[0131] In a further technical solution, the locking member 9 has a locking operation end;

[0132] The support column 1 is provided with a plug hole 11, which is the locking point;

[0133] When the first locking plate 8 slides to the locking point, the locking operation end is configured to be inserted into the plug hole 11.

[0134] The locking element 9 can be a screw, and the first locking plate 8 can be fixed to the inner wall of the opposite side of the two pillars 1 in the ladder structure, or it can be set on the side of the opposite side.

[0135] Since the locking mechanism 9 is cumbersome to hold and takes up a lot of space, it is locked by inserting it into the insertion hole 11.

[0136] In a further technical solution, the first locking plate 8 is provided with an alignment hole 10, and the locking operation end is configured to be inserted into the alignment hole 10;

[0137] The first locking plate 8 is rotatably connected to the locking member 9. One end of the locking member 9 is connected to the locking operation end, and the other end of the locking member 9 is a movable end. The movable end is configured to guide the locking member 9 to deflect around the rotatable connection point with the first locking plate 8.

[0138] When the ladder structure is in the unfolded state, the alignment hole 10 coincides with the insertion hole 11, and the locking operation end passes through the alignment hole 10 and extends to the insertion hole 11.

[0139] A torsion spring is provided at the rotatable connection between the first locking plate 8 and the locking member 9 to keep the locking operation end in the alignment hole 10.

[0140] With the above design, the operator can guide the locking member 9 to deflect around the rotation connection point with the first locking plate 8 by simply rotating the movable end of the locking member 9, so that the locking operation end can be inserted into or disengaged from the insertion hole 11 to realize the locking and unlocking operation of the first locking plate 8 and the support column 1.

[0141] In a further technical solution, a track 13 is provided on the surface of the support column 1, and the first locking plate 8 is positioned on the track 13 to slide relative to the support column 1.

[0142] For details, please refer to Figure 7 and Figure 8 .

[0143] When pedal 2 is in the deployed state, such as Figure 7 At this time, the alignment hole 10 coincides with the insertion hole 11, and the locking operation end passes through the alignment hole 10 and extends to the insertion hole 11, thereby restricting the position of the first locking plate 8.

[0144] With the position of the first locking plate 8 restricted, it means that the position of the step locking part 7 (i.e., the linkage) will no longer change. Figure 7 At this time, one end of the connecting rod is restricted by the first locking plate 8, and the other end will abut against a certain pedal 2. In specific operation, a locking module 5 can be set on both sides of a pedal 2, or a locking module 5 can be set on both sides of multiple pedals 2. Here, it is preferred to set a locking module 5 on both sides of a pedal 2.

[0145] Once both ends of the linkage are restricted, pedal 2 can be stabilized. Afterwards, if the user steps on pedal 2, pedal 2 will not move arbitrarily due to the cooperation of the linkage and connecting rod 3.

[0146] To put the pedal 2 into the folded state, press the movable end, and then the movable end guides the locking member 9 to deflect around the rotation connection point with the first locking plate 8, so that the locking operation end disengages from the insertion hole 11.

[0147] At the same time, push the connecting rod 3 up again (which means that the two pillars 1 are supported on the ground), and then the connecting rod 3 bends along with the pedal 2.

[0148] When pedal 2 bends, as Figure 8 The first locking plate 8 slides up, and the step locking part 7 gradually enters the support column 1.

[0149] In a further technical solution, the locking component includes a first locking plate 8 and a second locking plate that are fixedly connected in an L-shape;

[0150] The first locking plate 8 is slidably or rotatably positioned on the support column 1, and the first locking plate 8 is configured to be locked and fixed at the locking point; while the second locking plate is provided with an abutting mating surface for abutting the pedal 2;

[0151] When the ladder structure is in the unfolded state, the first locking plate 8 is configured to lock and fix at the locking point, and the abutting surface of the second locking plate is configured to abut against the pedal 2 as the limiting point.

[0152] In this embodiment, by simply sliding the first locking plate 8 to lock the locking member, the second locking plate can support the pedal 2 when the pedal 2 is in the unfolded state.

[0153] Meanwhile, the second locking plate and the first locking plate 8 can be welded together, or they can be movably connected by screws or other components.

[0154] The following operations are provided for the locking method between the first locking plate 8 and the second locking plate.

[0155] In the first embodiment, the first locking plate 8 and the second locking plate can be L-shaped. However, the first locking plate 8 is slidably connected to the side of the support column 1. Compared with the method of fixing by bolts, in this embodiment, the first locking plate 8 does not need to be fixed with screws. Instead, the first locking plate 8 is slid until it slides to the locking operation end on it and is inserted into the plug hole 11. At this time, the second locking plate abuts against the pedal 2, thereby fixing the pedal 2.

[0156] The second type is where the first locking plate 8 can rotate around the support column 1 until the second locking plate abuts against the pedal 2.

[0157] In summary, the locking element 9 can be a separate L-shaped plate or a sloping plate. In this case, the contact between the L-shaped plate or the sloping plate (with extension plates at both ends of the sloping plate) and the support column 1 and the pedal 2 is a surface contact, and they can be fixed by screws.

[0158] Secondly, the locking element 9 can be connected to the first locking plate 8 and the connecting rod. In this case, the first locking plate 8 is in contact with the support column 1, and the connecting rod is in contact with the pedal 2.

[0159] A further technical solution, viewed from a cross-sectional perspective, is that the support column 1 includes a first horizontal plate 14, a first vertical plate 15, and a second vertical plate 16. The first vertical plate 15 and the second vertical plate 16 are symmetrically arranged and spaced apart. The first horizontal plate 14 is positioned between the ends of the first vertical plate 15 and the second vertical plate 16, and the first horizontal plate 14 is perpendicular to the first vertical plate 15 and the second vertical plate 16.

[0160] The first vertical plate 15, the first horizontal plate 14 and the second vertical plate 16 are combined to form a first frame structure 17 with an open surface and a hollow interior;

[0161] Within the first frame structure 17, a first slot 18 is formed at the corner between the first vertical plate 15 and the first horizontal plate 14; a second slot 19 is formed at the corner between the first horizontal plate 14 and the second vertical plate 16.

[0162] Within the first frame structure 17, the first slot 18 and the second slot 19 combine to form a sliding channel, which is the track 13.

[0163] With the above design, the first locking plate 8 can only slide within the sliding channel and is limited by the first frame structure 17.

[0164] In a further technical solution, the two first support plates 20 are symmetrically arranged with reference to the center of symmetry of the two pillars 1;

[0165] The surface of the first support plate 20 is provided with a mounting groove 21, which is configured to accommodate the second locking plate. In order to put the pedal 2 into a folded state, the two first support plates 20 rotate about their pivot 4 as the deflection center until the two mounting grooves 21 are opposite each other.

[0166] With the above design, when the pedal 2 is in the folded state, the second locking plate will be hidden in the mounting slot 21.

[0167] Further technical solutions,

[0168] Viewed from a cross-sectional perspective, the first support plate 20 includes a first longitudinal plate 22, a first transverse plate 23, and a second longitudinal plate 24;

[0169] One end of the first horizontal plate 23 is integrally connected to the end of the second vertical plate 24;

[0170] The other end surface of the first horizontal plate 23 is integrally connected to the end of the first vertical plate 22;

[0171] The first longitudinal plate 22, the first transverse plate 23, and the second longitudinal plate 24 are combined to form a second frame structure 25. The second frame structure 25 has a groove with an opening, which is the mounting groove 21.

[0172] The lengths of the first longitudinal support plate 22 and the second longitudinal support plate 24 are both greater than the length of the first transverse support plate 23, so that both ends of the first longitudinal support plate 22 and the second longitudinal support plate 24 extend beyond the end of the first transverse support plate 23.

[0173] When the pedal 2 is in the unfolded state, the opposite ends of the two first support plates 20 abut against each other and the cross-sectional projections of the two first support plates 20 coincide.

[0174] Thanks to the above design, the pedal 2 is integrated when unfolded, with no protrusions at the edges, resulting in a good aesthetic appearance.

[0175] The pedal 2 design achieves both aesthetic appeal and practicality through two symmetrically arranged first support plates 20 and a clever structural arrangement. Specifically, each first support plate 20 consists of a first vertical plate 22, a first horizontal plate 23, and a second vertical plate 24, forming a second frame structure 25 with an open groove (i.e., mounting groove 21) to accommodate the second locking plate. When the pedal 2 is in the unfolded state, the two first support plates 20 abut against each other around a pivot 4, with their cross-sectional projections coinciding, ensuring a flat and unprotruding surface and a unified appearance, enhancing both aesthetics and user experience. When folded, the two first support plates 20 rotate around the pivot 4, aligning the mounting grooves 21 and concealing the second locking plate, ensuring the pedal 2 is compact and flat when folded. This design not only enhances the visual appeal of the pedal 2 but also optimizes its practical functions, such as facilitating storage and reducing space occupation.

[0176] In a further technical solution, a rectangular groove 26 is provided at one end of each of the two first support plates 20, and the two rectangular grooves 26 are combined to form a quadrilateral hole 27.

[0177] The connecting rod 3 is disposed in the quadrilateral hole 27, and the pivot 4 passes through the connecting rod 3.

[0178] The above design allows the connecting rod 3 to be hidden, so that it can also be hidden when storing the folding ladder.

[0179] Further technical solutions,

[0180] The length of the connecting rod 3 is greater than the height of the stacked structure formed by the combination of multiple pedals 2, so that the end of the connecting rod 3 extends beyond the stacked structure and forms an operating section;

[0181] Two support rods 28 are rotatably connected to the side of the operating section, and the two support rods 28 are symmetrically arranged with reference to the center of symmetry of the two support columns 1; a guide sliding hole 12 is provided at the rotatable connection between the surface of the operating section and the two support rods 28.

[0182] Furthermore, the ends of the two support rods 28 that are far apart from each other are rotatably connected to the two support columns 1 respectively.

[0183] With the above design, the connecting rod 3 can simultaneously drive all the pedals 2 to unfold or fold. When unfolding, the operating section of the connecting rod 3 is supported by the support rod 28, preventing damage to the pedals 2. When folding, the pedals 2 fold, and the rotating connection of the two support rods 28 slides within the guide hole 12, ensuring that the upward sliding of the connecting rod 3 is not affected. This is because folding the pedals 2 requires pushing the connecting rod 3 upward to fold all the pedals 2, and unfolding requires pulling the connecting rod 3 downward to unfold the pedals 2.

[0184] The above design achieves efficient folding and unfolding of the pedal 2 through a unique mechanical structure, while ensuring that the connecting rod 3 and the support rod 28 can be hidden during storage, enhancing the overall compactness and aesthetics. Specifically, the two first support plates 20 have rectangular grooves 26 at their opposite ends, which combine to form a quadrilateral hole 27. The connecting rod 3 is placed inside, and the pivot passes through the connecting rod 3, allowing the connecting rod 3 to be hidden, simplifying the appearance and facilitating subsequent folding operations.

[0185] Furthermore, the length of the connecting rod 3 exceeds the stacked height of multiple pedals 2. The extended portion forming the operating section not only provides convenience for manual operation but also enables simultaneous control of all pedals 2 via two side-rotating support rods 28. The support rods 28 are symmetrically arranged with respect to the center of symmetry of the support column 1 and achieve smooth folding and unfolding through guide holes 12. When folding, the operating section is pushed upwards, and the guide holes 12 allow the support rods 28 to slide freely with the pedals 2 without affecting the movement of the connecting rod 3. When unfolding, the operating section is pulled downwards, and the support rods 28 support the connecting rods 3, ensuring the structural stability of the pedals 2 and preventing damage. This design not only improves the convenience and safety of pedal operation but also optimizes space utilization, making the entire ladder easier to store when not in use.

[0186] Further technical solutions,

[0187] The internal width of the first frame structure 17, the width of the first support plate 20, and the width of the second locking plate are set in a decreasing order.

[0188] With the above design, the first support plate 20 can be hidden inside the first frame structure 17, and the first support plate 20 can hide the second locking plate.

[0189] Working principle:

[0190] Support the two pillars 1 on the ground (when storing the pillars 1, fix the two pillars 1 with Velcro).

[0191] Since both the ladder and step 2 have extended and supported states, the following description will focus on the extended state.

[0192] When pedal 2 is in the deployed state, such as Figure 7 At this time, the alignment hole 10 coincides with the insertion hole 11, and the locking operation end passes through the alignment hole 10 and extends to the insertion hole 11, thereby restricting the position of the first locking plate 8.

[0193] With the position of the first locking plate 8 restricted, it means that the position of the step locking part 7 (i.e., the second locking plate) will no longer change. Figure 7 At this time, one end of the step locking part 7 is restricted by the first locking plate 8, and the other end will abut against a certain pedal 2. In actual operation, a locking module 5 can be set on both sides of a pedal 2, or a locking module 5 can be set on both sides of multiple pedals 2. Here, it is preferable to set a locking module 5 on both sides of a pedal 2.

[0194] This stabilizes pedal 2, so that once the user steps on pedal 2, it will not move freely with the cooperation of the second locking plate and the connecting rod 3.

[0195] To put the pedal 2 into the folded state, press the movable end, and then the movable end guides the locking member 9 to deflect around the rotation connection point with the first locking plate 8, so that the locking operation end disengages from the insertion hole 11.

[0196] Simultaneously, the connecting rod 3 is pushed upwards, causing it to bend along with all the pedals 2. This means the two first support plates 20 rotate around the pivot 4, aligning the mounting slots 21 and thus concealing the second locking plate, ensuring the pedals 2 are compact and flat after folding.

[0197] When pedal 2 bends, as Figure 8Pull the linkage, the first locking plate 8 slides upward, and the linkage begins to gradually enter the support column 1. Until the pedal 2 is fully folded and the two support columns 1 are in contact, the two support columns 1 are finally secured with Velcro.

[0198] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A folding ladder, comprising two support columns (1), multiple treads (2) and a connecting rod (3); The pedal (2) is formed by two first support plates (20) hinged together by pivots (4); and the plurality of pedals (2) are connected between the two support columns (1) to form a ladder structure, the ladder structure having an unfolded state and a folded state; the connecting rod (3) is configured to connect to all of the pivots (4); Its features are: The climbing ladder also includes a locking module (5); The locking module (5) is provided at the connection between the pedal (2) and the support column (1); the locking module (5) includes a locking member having a support locking part (6) and a step locking part (7); The support column (1) is provided with a locking point at the corresponding position of the end of the pedal (2), and the pedal (2) has a limiting point at the end near the support column (1); When the ladder structure is in the unfolded state, the support locking part (6) of the locking member acts on the locking point on the support column (1), and the step locking part (7) of the locking member acts on the limiting point on the pedal (2) to limit the rotation tendency between the support column (1) and the pedal (2); the locking member can be disassembled or moved relative to the support column (1) to release the restriction on the support column (1) and the pedal (2).

2. The folding ladder according to claim 1, characterized in that: The locking element is slidably or rotatably disposed relative to the support column (1) and can be positioned at a locking point on the support column (1).

3. The folding ladder according to claim 2, characterized in that: The locking element includes a first locking plate (8) and a connecting rod, the first locking plate (8) being configured to slide along the support (1); The first locking plate (8) is provided with a locking member (9), which can lock the first locking plate (8) at the locking point, and the locking member (9) serves as the supporting locking part (6); One end of the connecting rod is hinged to the first locking plate (8), while the other end is hinged to the limiting point of the pedal (2) as a step locking part (7); When the ladder structure is in the unfolded state, the first locking plate (8) is locked at the locking point by the locking member (9), and the connecting rod pulls the pedal (2) by itself to restrict the rotation of the pedal (2) to lock the unfolded state of the ladder.

4. The folding ladder according to claim 3, characterized in that: The locking member (9) has a locking operation end; The support column (1) is provided with a plug hole (11), and the plug hole (11) is the locking point; When the first locking plate (8) slides to the locking point, the locking operation end is configured to be inserted into the plug hole (11).

5. The folding ladder according to claim 4, characterized in that: The first locking plate (8) is provided with an alignment hole (10), and the locking operation end is configured to be inserted into the alignment hole (10); The first locking plate (8) is rotatably connected to the locking member (9), and one end of the locking member (9) is connected to the locking operation end. The other end of the locking member (9) is a movable end. The movable end is configured to guide the locking member (9) to deflect around the rotatable connection point with the first locking plate (8). When the ladder structure is in the unfolded state, the alignment hole (10) coincides with the insertion hole (11), and the locking operation end passes through the alignment hole (10) and extends to the insertion hole (11).

6. The folding ladder according to claim 3, characterized in that: The support (1) has a track (13) on its surface, and the first locking plate (8) is positioned on the track (13) to slide relative to the support (1).

7. The folding ladder according to claim 6, characterized in that: Viewed from a cross-sectional perspective, the support column (1) includes a first horizontal plate (14), a first vertical plate (15), and a second vertical plate (16). The first vertical plate (15) and the second vertical plate (16) are symmetrically arranged and spaced apart. The first horizontal plate (14) is positioned between the ends of the first vertical plate (15) and the second vertical plate (16), and the first horizontal plate (14) is perpendicular to the first vertical plate (15) and the second vertical plate (16). The first vertical plate (15), the first horizontal plate (14) and the second vertical plate (16) are combined to form a first frame structure (17) with an open surface and a hollow interior; Within the first frame structure (17), a first slot (18) is formed at the corner between the first vertical plate (15) and the first horizontal plate (14); a second slot (19) is formed at the corner between the first horizontal plate (14) and the second vertical plate (16). Within the first frame structure (17), the first slot (18) and the second slot (19) combine to form a sliding channel, which is the track (13).

8. The folding ladder according to claim 1, characterized in that: Each of the two first support plates (20) has a rectangular groove (26) at one opposite end, and the two rectangular grooves (26) are combined to form a quadrilateral hole (27); The connecting rod (3) is disposed in the quadrilateral hole (27), and the pivot (4) passes through the connecting rod (3).

9. The folding ladder according to claim 2, characterized in that: The locking component includes a first locking plate (8) and a second locking plate that are fixedly connected in an L-shape; The first locking plate (8) is slidably or rotatably positioned on the support column (1), and the first locking plate (8) is configured to be locked at the locking point; while the second locking plate is provided with an abutting mating surface for abutting the pedal (2); When the ladder structure is in the unfolded state, the first locking plate (8) is configured to be locked at the locking point, and the abutting surface of the second locking plate is configured to abut against the pedal (2) as the limiting point.

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