Herringbone ladder

Abstract

The utility model discloses a herringbone ladder which comprises a ladder frame, an inclined strut and a plurality of pedals, the upper end of the inclined strut is hinged with the ladder frame, the pedals are hinged on the ladder frame at intervals, the pedals can turn over between respective supporting positions and storage positions in a reciprocating manner, and the pedals comprise a first-stage pedal and a second-stage pedal; a lock rod is transversely arranged on the inclined strut, the hinged side of the first-stage pedal is hinged to the ladder frame, the turnover side of the first-stage pedal is supported on the lock rod, a locking clamp is further assembled on the turnover side and comprises a lock hook, when the locking clamp is located at the locking position, the lock hook of the locking clamp is hooked to the lock rod to lock the first-stage pedal at the supporting position, and when the locking clamp is located at the releasing position, the lock hook is separated from the lock rod to lock the first-stage pedal at the supporting position. The first-stage pedal can be overturned to a storage position; a first linkage rod is further arranged between the ladder frame and the inclined supporting frame, the first linkage rod is sequentially hinged to the first-stage pedal and the second-stage pedal, and a second linkage rod is hinged between the first linkage rod and the inclined supporting frame. By optimizing the structure, the supporting stability and the folding convenience can be considered at the same time.

Description

Technical Field

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

[0002] Ladders are often used in high-altitude operations such as renovation and maintenance. Since herringbone ladders have better support, they are now widely used. The herringbone ladder is mostly composed of a ladder frame, an inclined support frame and pedals. For the convenience of transportation and storage, the pedals of existing herringbone ladders are mostly movably arranged on the ladder frame so that they can be folded to reduce the storage volume when not in use. However, the supporting stability of the movably arranged pedals cannot be guaranteed. During use, if the support is not in place or the force is too large, the pedals are easy to flip over, posing a safety hazard. Existing herringbone ladders are mostly equipped with cross braces between the ladder frame and the diagonal support frame to improve the supporting stability. However, the setting of the cross brace will affect the folding and storage of the herringbone ladder. Summary of the invention

[0003] The utility model aims to solve the problem that the prior art stepladder cannot take into account both the support stability and the folding convenience at the same time, and provides a stepladder with stable support and easy folding and storage. The invention objective of the utility model is achieved through the following technical solutions:

[0004] The step ladder according to claim 1, wherein the upper end of the diagonal support frame is hinged to the ladder frame, the step ladders are hinged to the ladder frame at intervals, and the step ladders can be flipped back and forth between their respective supporting positions and storage positions, the step ladders comprising a first step ladder located at the top and a second step ladder located below the first step ladder; a locking rod is horizontally arranged on the diagonal support frame, the hinged side of the first step ladder is hinged to the ladder frame, the flipping side of the first step ladder is supported on the locking rod, and the flipping side of the first step ladder is also equipped with a locking clip, the locking clip comprises a locking hook, when the locking clip is in the locking position, the locking hook is hooked to the locking rod to lock the first step ladder in the supporting position, when the locking clip is in the releasing position, the locking hook is disengaged from the locking rod, and the first step ladder can be flipped to the storage position; a first linkage rod is also arranged between the ladder frame and the diagonal support frame, the first linkage rod is hinged to the first step ladder and the second step ladder in sequence, and a second linkage rod is hinged between the first linkage rod and the diagonal support frame.

[0005] Preferably, the locking clip is hinged to the bottom of the first-stage pedal via an assembly shaft, and a torsion spring is installed between the locking clip and the assembly shaft to keep the locking clip in the locked position; the locking clip also includes a handle, and the handle and the lock hook are arranged on both sides of the assembly shaft.

[0006] Preferably, a slot capable of being snapped onto a locking rod is provided at the bottom of the first-stage pedal.

[0007] Preferably, a tool bench is mounted on the upper portion of the ladder frame, an assembly portion of the tool bench is hinged to the ladder frame via a hinge shaft, and the assembly portion is provided with a limit plate for limiting a flipping angle of the tool bench.

[0008] Preferably, the storage surface of the tool bench is formed with storage holes, storage grooves and a storage tray.

[0009] Preferably, the storage holes include circular holes and strip holes, and are distributed on the periphery of the storage table top. There are two storage grooves, which are arranged on both sides of the storage plate.

[0010] Preferably, the storage tray includes a square sunken groove on the periphery and concentric circular grooves located inside the square sunken groove, wherein the concentric circular grooves are composed of a plurality of concentric sunken circular grooves, the depth of the plurality of sunken circular grooves gradually increases from the outside to the inside, and the connecting position of two adjacent sunken circular grooves forms an annular step edge.

[0011] Preferably, the ladder frame comprises two vertical poles parallel to each other, the upper ends of the vertical poles are connected by a U-shaped leaning rod, and U-shaped handrails are fixedly provided on the two vertical poles.

[0012] Preferably, the diagonal support frame includes two mutually parallel diagonal support rods, which are hinged to the vertical rods on the same side through a limit sleeve; the first linkage rod and the second linkage rod are each provided with two, the first linkage rod is parallel to the vertical rod on the same side, and the second linkage rod is diagonally supported between the first linkage rod and the diagonal support rod on the same side.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the herringbone ladder disclosed by the utility model can lock the first-stage pedal in the supporting position by placing a locking rod horizontally on the diagonal support frame, which cooperates with the locking clip on the first-stage pedal, and can also limit the supporting angle of the ladder frame and the diagonal support frame, thereby improving the supporting stability of the herringbone ladder; the arrangement of the first linkage rod and the second linkage rod not only improves the supporting stability of the second-stage pedal, but also can serve as a linkage component to realize the linkage of the first-stage pedal with the second-stage pedal and the diagonal support frame. When the herringbone ladder is folded and stored, only one operation of lifting the first-stage pedal is required, and the storage operation is convenient; the arrangement of the tool bench is convenient for placing tools, and there is no need to frequently go up and down to take tools during decoration and maintenance work, thereby improving the functionality of the herringbone ladder; the storage holes, storage slots and storage trays on the tool bench can place different tools as needed, and the storage tray includes a plurality of concentric sunken circular grooves, which can place paint buckets of different barrel diameters, and the arrangement of the annular step edge can ensure that the paint buckets are placed firmly, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of a first-stage pedal and a locking rod in the utility model;

[0016] Figure 3 This is a schematic diagram of the tool bench structure in the utility model;

[0017] Markings in the figure: ladder frame 10; upright pole 11; U-shaped leaning rod 12; U-shaped handrail 13; diagonal support frame 20; diagonal support rod 21; locking rod 22; first-level pedal 31; locking clip 311; locking hook 3111; handle 3112; second-level pedal 32; tool table 40; circular hole 41; strip hole 42; storage groove 43; square sunken groove 44; concentric circle groove 45; annular step edge 451; first linkage rod 51; second linkage rod 52. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0019] See Change Figure 1-Figure 2 The present embodiment discloses a herringbone ladder, which includes a ladder frame 10, a diagonal support frame 20 and a plurality of pedals. The upper end of the diagonal support frame 20 is hinged to the ladder frame 10, and the pedals are hinged to the ladder frame 10 at intervals. The pedals can be flipped back and forth between their respective supporting positions and storage positions. The pedals include a first-level pedal 31 located at the top and four second-level pedals 32 located below the first-level pedal 31.

[0020] A locking rod 22 is horizontally placed on the diagonal support frame 20, and the hinged side of the first-level pedal 31 is hinged to the ladder frame 10. The flip side of the first-level pedal 31 is supported on the locking rod 22. The flip side of the first-level pedal 31 is also equipped with a locking clip 311, and the locking clip 311 includes a locking hook 3111. When the locking clip 311 is in the locking position, the locking hook 3111 is hooked to the locking rod 22 to lock the first-level pedal 31 in the supporting position. When the locking clip 311 is in the releasing position, the locking hook 3111 is separated from the locking rod 22, and the first-level pedal 31 can be flipped to the storage position. The herringbone ladder is formed by horizontally placing the locking rod 22 on the diagonal support frame 20 and cooperating with the locking clip on the first-level pedal 31. 311, which can lock the first-level pedal 31 in the supporting position and limit the supporting angle of the ladder frame 10 and the diagonal support frame 20, thereby improving the supporting stability of the stepladder; the locking clamp 311 is hinged at the bottom of the first-level pedal 31 through an assembly axis, and a torsion spring is installed between the locking clamp 311 and the assembly axis to keep the locking clamp 311 in the locking position; the locking clamp also includes a handle 3112 to facilitate opening the locking clamp 311, and the handle 3112 and the locking hook 3111 are respectively arranged on both sides of the assembly axis; the bottom of the first-level pedal 31 is provided with a slot that can be snapped into the locking rod 22, so as to further improve the supporting stability of the first-level pedal 31.

[0021] A first linkage rod 51 is also provided between the ladder frame 10 and the diagonal brace frame 20, and the first linkage rod 51 is hinged to the first pedal 31 and the second pedal 32 in sequence, and a second linkage rod 52 is hinged between the first linkage rod 51 and the diagonal brace frame 20; the ladder frame 10 includes two parallel vertical poles 11, and the upper ends of the vertical poles 11 are connected by a U-shaped leaning rod 12, and U-shaped handrails 13 are fixed on the two vertical poles 11 to improve safety; the diagonal brace frame 20 includes two parallel diagonal brace rods 21, and the diagonal brace rods 21 are hinged to the vertical poles 11 on the same side by a limit sleeve; the first linkage rod 51 and the second linkage rod 52 are each provided with two, the first linkage rod 51 is parallel to the vertical pole 11 on the same side, and the second linkage rod 52 is diagonally supported between the first linkage rod 51 and the diagonal brace rod 21 on the same side. The arrangement of the first linkage rod 51 and the second linkage rod 52 not only improves the supporting stability of the secondary pedal 32, but also can serve as a linkage component to realize the linkage between the first pedal 31 and the second pedal and the diagonal support frame 20. When folding and storing the stepladder, it is only necessary to open the locking clip 311 and lift the first pedal 31. Under the action of the two linkage rods, the secondary pedal 32 will also flip to the storage position, and the diagonal support frame 20 will also retract, which is convenient to operate.

[0022] See also Figure 3 A tool bench 40 is assembled on the upper part of the ladder frame 10. The assembly part of the tool bench 40 is hinged to the ladder frame 10 through a hinge axis. The assembly part is provided with a limit plate for limiting the flipping angle of the tool bench 40. The limit plate cooperates with the limit screw on the ladder frame 10 to improve the stability of the tool bench 40.

[0023] The storage table top of the tool bench 40 is formed with storage holes, storage grooves 43 and a storage tray; the storage holes include circular holes 41 and strip holes 42, and are distributed on the periphery of the storage table top. The circular holes can prevent tools with handles such as wrenches and hammers, and the strip holes 42 can be used to place spatulas; there are two storage grooves 43, which are arranged on both sides of the storage tray, and the storage grooves 43 can be used to place small parts such as bolts and screws.

[0024] The storage tray includes a square sunken groove 44 on the periphery and a concentric circular groove 45 located inside the square sunken groove. The concentric circular groove 45 is composed of a plurality of concentric sunken circular grooves. The depth of the plurality of sunken circular grooves gradually increases from the outside to the inside. The connecting position of two adjacent sunken circular grooves forms an annular step edge 451. The storage tray includes a plurality of concentric sunken circular grooves, which can hold paint buckets of different diameters. The setting of the annular step edge can ensure that the paint bucket is placed firmly and improve the safety of the stepladder.

[0025] It should be understood that in the claims and description of the utility model, all "including..." should be understood as open-ended meanings, that is, their meanings are equivalent to "at least including...", and should not be understood as closed-ended meanings, that is, their meanings should not be understood as "only including...". The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0026] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should be covered by the protection scope of the utility model.

Claims

1. A herringbone ladder, comprising a ladder frame, a diagonal support frame and a plurality of pedals, characterized in that: The upper end of the diagonal support frame is hinged to the ladder frame, and the pedals are hinged to the ladder frame at intervals, and the pedals can flip back and forth between their respective supporting positions and storage positions, and the pedals include a first-level pedal located at the top and a second-level pedal located below the first-level pedal; a locking rod is horizontally placed on the diagonal support frame, and the hinged side of the first-level pedal is hinged to the ladder frame, and the flipping side of the first-level pedal is supported on the locking rod, and the flipping side of the first-level pedal is also equipped with a locking clip, and the locking clip includes a locking hook. When the locking clip is in the locking position, its locking hook is hooked to the locking rod to lock the first-level pedal in the supporting position, and when the locking clip is in the releasing position, the locking hook is disengaged from the locking rod, and the first-level pedal can be flipped to the storage position; a first linkage rod is also provided between the ladder frame and the diagonal support frame, and the first linkage rod is hinged to the first-level pedal and the second-level pedal in sequence, and a second linkage rod is hinged between the first linkage rod and the diagonal support frame.

2. A herringbone ladder according to claim 1, characterized in that: The locking clip is hinged to the bottom of the first pedal through an assembly shaft, and a torsion spring is installed between the locking clip and the assembly shaft to keep the locking clip in the locked position; the locking clip also includes a handle, and the handle and the lock hook are respectively arranged on both sides of the assembly shaft.

3. A herringbone ladder according to claim 2, characterized in that: A slot capable of being buckled to a locking rod is provided at the bottom of the first-stage pedal.

4. A herringbone ladder according to any one of claims 1 to 3, characterized in that: A tool bench is mounted on the upper portion of the ladder frame. The mounting portion of the tool bench is hinged to the ladder frame via a hinge shaft. The mounting portion is provided with a limiting piece for limiting the turning angle of the tool bench.

5. The stepladder according to claim 4, characterized in that: The tool bench has a storage surface formed with storage holes, storage slots and a storage tray.

6. The stepladder according to claim 5, characterized in that: The storage holes include circular holes and strip holes, and are distributed on the periphery of the storage table; two storage grooves are provided, which are respectively arranged on both sides of the storage plate.

7. The stepladder according to claim 6, characterized in that: The storage tray includes a square sunken groove on the periphery and a concentric circular groove located inside the square sunken groove. The concentric circular groove is composed of a plurality of concentric sunken circular grooves. The depth of the plurality of sunken circular grooves gradually increases from the outside to the inside, and the connecting position of two adjacent sunken circular grooves forms an annular step edge.

8. A herringbone ladder according to any one of claims 1 to 3, characterized in that: The ladder frame comprises two vertical poles parallel to each other, the upper ends of the vertical poles are connected by a U-shaped supporting rod, and the two vertical poles are fixedly provided with U-shaped handrails.

9. The stepladder according to claim 8, characterized in that: The diagonal support frame includes two mutually parallel diagonal support rods, which are hinged to the vertical rods on the same side through a limit sleeve; the first linkage rod and the second linkage rod are each provided with two, the first linkage rod is parallel to the vertical rod on the same side, and the second linkage rod is diagonally supported between the first linkage rod and the diagonal support rod on the same side.

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