Assembled step of ladder and folding ladder

Abstract

The present invention provides an assembled step of a ladder, comprising at least two step units. One end of a top surface of each step unit in the width direction extends in the thickness direction to form a first connecting part, and the other end thereof extends in the thickness direction to form a second connecting part. The first connecting part and the second connecting part of two adjacent step units are connected to each other, so that the step units are assembled in the width direction to form the assembled step of the ladder.

Description

A type of ladder with interlocking steps and a folding ladder

[0001] Cross-references to related applications

[0002] This application claims priority to and is based on Chinese Patent Application No. 202520471044.6, filed on March 18, 2025, with the invention entitled "A Splicing Step and Folding Ladder for a Ladder", the contents of which are incorporated herein by reference. Technical Field

[0003] This invention relates to ladders, and more particularly to a ladder with interlocking steps and a folding ladder. Background Technology

[0004] Traditional folding ladders typically use a fixed design for their treads, with the tread width and installation position limited during the manufacturing stage, resulting in a significant limitation in the ladder's functionality. In existing technologies, users often need to purchase multiple sizes of ladders to accommodate different working heights or spans, increasing costs and wasting storage space.

[0005] The width of the steps on a standard folding ladder cannot be adjusted to suit the user's limb length or the characteristics of the work environment. When setting up the ladder in a confined space, the fixed width of the steps often interferes with surrounding obstacles, preventing the ladder from unfolding effectively. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the present invention provides a ladder with a splicing tread, including at least two tread units, wherein the top surface of the tread unit extends from one end in the width direction along the thickness direction to form a first connecting part, and the other end extends along the thickness direction to form a second connecting part.

[0007] The first connecting part and the second connecting part of two adjacent pedal units are connected to each other so that the pedal units are spliced ​​together along the width direction to form the spliced ​​pedals of the ladder.

[0008] In some embodiments, the first connecting portion is provided with at least two first riveting portions that protrude along its thickness direction along its length direction, and the second connecting portion is provided with at least two second riveting portions that are recessed along its thickness direction along its length direction, and the first riveting portions and the second riveting portions are press-fitted together.

[0009] In some embodiments, the first connecting portion is provided with at least two riveting holes along its length, and the second connecting portion is provided with at least two riveting holes along its length, and the riveting holes of the first connecting portion and the riveting holes of the second connecting portion are riveted together by rivets.

[0010] In some embodiments, the first connecting part is provided with at least two screw holes along the length direction, and the second connecting part is provided with at least two screw holes along the length direction; the bolt passes through the screw holes of the first connecting part and the screw holes of the second connecting part and is connected to the nut.

[0011] In some embodiments, the top of the second connecting portion bends toward the first connecting portion of the adjacent pedal unit to form a U-shaped hook, and the first connecting portion extends upward to form a limiting portion that engages with the U-shaped hook for limiting.

[0012] In some embodiments, the bottom of the second connecting portion is bent toward the first connecting portion of the adjacent pedal unit to form a U-shaped base, which limits the bottom of the first connecting portion.

[0013] In some embodiments, a U-shaped package is also included, the U-shaped package including an upper side and a lower side disposed opposite each other, and a side package portion connecting the upper side and the lower side.

[0014] In some embodiments, the upper part has rivet holes at both ends, and the top surface of the pedal unit has rivet holes corresponding to the positions of the rivet holes on the upper part. The rivet holes on the upper part and the rivet holes on the top surface of the pedal unit are riveted together by rivets.

[0015] In some embodiments, the bottom of the second connecting portion extends outward to form an extension portion, and rivet holes are provided at both ends of the extension portion along the length direction. The lower part is provided with riveting holes that correspond one-to-one with the rivet holes of the extension portion. The riveting holes of the lower part and the riveting holes of the extension portion are riveted together by rivets.

[0016] The present invention also provides a folding ladder, including a front ladder frame and a rear ladder frame, wherein two rods of the front ladder frame are hingedly connected to two rods of the rear ladder frame, characterized in that it includes the above-mentioned modular treads, wherein the modular treads include a top tread and a plurality of sub-treads arranged sequentially along the height direction.

[0017] In some embodiments, the number of pedal units of the top pedal is greater than the number of sub-pedals; the front end of the side enclosure is provided with a first hinge, and the front ends of the top pedal and the sub-pedals are hinged to the rod of the front ladder frame through the first hinge.

[0018] In some embodiments, a second hinge is provided at the middle position of the top pedal and a second hinge is provided at the rear end of the sub-pedal; a side link is also included, and the top pedal and the sub-pedal are hinged to the side link via the second hinge.

[0019] In some embodiments, a support rod is also included, one end of which is hinged to the middle of the side connecting rod, and the other end of which is hinged to the middle of the rear ladder frame.

[0020] Compared to existing technologies, the pedal of the present invention includes multiple pedal units, each pedal unit extending downwards to form a first connecting portion and a second connecting portion. The first connecting portions and second connecting portions of two adjacent pedal units are connected to each other to form the interlocking pedal, allowing the pedal width to be adjusted for suitability according to specific user scenarios and the user's limb characteristics. Furthermore, the pedal of the present invention is easy to transport and store. Attached Figure Description

[0021] Figure 1 is a schematic diagram of the folding ladder of the present invention;

[0022] Figure 2 is a schematic diagram of the top pedal of the present invention;

[0023] Figure 3 is an exploded view of the top pedal of the present invention;

[0024] Figure 4 is a cross-sectional view of the top pedal AA in Example 1;

[0025] Figure 5 is an enlarged view of section a in Figure 4;

[0026] Figure 6 is a cross-sectional view of the top pedal AA in Example 2;

[0027] Figure 7 is an enlarged view of section a in Figure 6;

[0028] Figure 8 is a cross-sectional view of the top pedal AA in Example 3;

[0029] Figure 9 is an enlarged view of point a in Figure 8. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0033] Example 1

[0034] Referring to Figures 1-9, this embodiment provides a folding ladder, including a front ladder frame 1 and a rear ladder frame 2. Two rods of the front ladder frame 1 are hinged to two rods of the rear ladder frame 2. A top step 3 and two sub-steps 5 are respectively arranged from top to bottom along the height direction. The width of the top step 3 is greater than the width of the sub-steps 5. The front ends of the top step 3 and sub-steps 5 are hinged to the two rods of the front ladder frame 1, and the rear end of the top step 3 is hinged to the two rods of the rear ladder frame 2. The middle part of the top step 3 and the rear end of the sub-steps 5 are hinged to a side connecting rod 4. The ladder also includes a pair of support rods 6. One end of the support rod 6 is hinged to the middle of the side connecting rod 4, and the other end of the support rod 6 is hinged to the middle of a rod of the rear ladder frame 2. Through the above-described hinged connection method, the folding ladder of this embodiment can achieve rotation at the connection point, thereby realizing folding.

[0035] As shown in Figures 2-5, taking the top pedal 3 as an example, the top pedal 3 includes three pedal units 32, which are divided into pedal units A and B. The top surface of pedal unit A extends downward along the thickness direction at one end in the width direction to form a first connecting part 321 on the side. The corresponding end of pedal unit B extends downward along the thickness direction to form a second connecting part 322 on the side. The bottom of the second connecting part 322 extends outward to form an extension part 3224, which is approximately parallel to the top plane. The first connecting part 321 and the second connecting part 322 are approximately perpendicular to the top surface.

[0036] The first connecting portion 321 has two protruding first riveting portions 3211 along its length direction and along its thickness direction, and the two first riveting portions 3211 are symmetrically arranged. The second connecting portion 322 has two concave first riveting portions 3222 along its length direction and along its thickness direction, and the first riveting portions 3222 correspond one-to-one with the first riveting portions 3222. The first riveting portions 3211 and the first riveting portions 3222 are press-fitted together, so that the protruding first riveting portions 3211 are pressed into the concave first riveting portions 3222, thereby achieving the connection and fixation of the first connecting portion 321 and the second connecting portion 322. In this embodiment, since the first riveting portions 3211 need to be pressed into the first riveting portions 3222, the panel material of the pedal unit 32 itself can be deformed, for example, using ordinary low carbon steel, aluminum, aluminum alloy, etc. The first connecting portions 321 and the second connecting portions 322 of two adjacent pedal units 32 are connected by press-fitting to splice the pedal units 32 into the top pedal 3.

[0037] To further increase the support strength of the pedal, in this embodiment, the top of the second connecting portion 322 bends towards the first connecting portion 321 of the adjacent pedal unit 32, thereby forming a downward U-shaped hook 3221. The pedal forms the first connecting portion 321 downwards while simultaneously extending upwards into an upward-facing U-shaped limiting portion 3212. The limiting portion 3212 extends into the U-shaped hook 3221 and engages with it for limiting. The bottom of the second connecting portion 322 bends towards the first connecting portion 321 of the adjacent pedal unit 32, forming a U-shaped base support 3223. The bottom end 3213 of the first connecting portion 321 is inserted into the second connecting portion U-shaped base support 3223 to support the first connecting portion 321.

[0038] As shown in Figure 5, the pedal is divided into pedal unit A and pedal unit B. When pedal unit B is subjected to force, pedal unit B can be hooked onto the limiting part 3212 of pedal unit A through the U-shaped hook 3221 to achieve leverage. When pedal unit A is subjected to force, the U-shaped base support 3223 can support pedal unit A.

[0039] Sub-pedal 5 is also assembled in the same way as described above, and the number of pedal units in sub-pedal 5 can be 2.

[0040] To enable the connection between the top pedal 3, the sub-pedal 5, the front ladder frame 1, and the side connecting rod 4, this embodiment, taking the top pedal 3 as an example, also includes a U-shaped encapsulation component 31 to encapsulate the side of the assembled top pedal 3. The U-shaped encapsulation component 31 includes an upper side and a lower side opposite to each other, and a side encapsulation portion connecting the upper side and the lower side. The encapsulation component 31 is made of metal, such as steel or aluminum.

[0041] Specifically, the upper part has rivet holes at both ends, and the pedal unit 32 corresponding to the rivet holes on the upper part also has rivet holes on its top surface. The rivet holes on the upper part and the rivet holes on the top surface of the pedal unit 32 are riveted together by rivets. The bottom of the second connecting part 322 extends outward to form an extension part 3224. The extension part 3224 has rivet holes at both ends along its length direction, and the lower part has rivet holes that correspond one-to-one with the rivet holes of the extension part 3224. The rivet holes on the lower part and the rivet holes of the extension part 3224 are riveted together by rivets. In this way, the two U-shaped encapsulation parts 31 are respectively installed on the two sides of the pedal.

[0042] The front end of the side encapsulation part is provided with a first hinge member 312, the middle position of the top pedal 3 is provided with a second hinge member, the rear end of the top pedal is also provided with a third hinge hole 313, and the rear end of the sub-pedal 5 is provided with a second hinge member 311; the front ends of the top pedal 3 and the sub-pedal 5 are hinged to the rod of the front ladder frame 1 through the first hinge member 312, and the top pedal 3 and the sub-pedal 5 are hinged to the side connecting rod 4 through the second hinge member 311, thereby connecting the top pedal 3 and the sub-pedal 5 to the rod of the front ladder frame 1 and the side connecting rod 4, and the rear end of the top pedal is hinged to the bracket 2 through the third hinge hole 313.

[0043] As shown in Figures 3, 4, and 6, the A pedal unit, or end pedal unit, has a closed frame 33 on the side away from the splice, with a depth similar to that of the first and second connecting parts. A small closed frame 34 is provided approximately in the middle of the A and B pedal units, which can enhance the support of the pedal unit. The pedal unit is usually made of aluminum or plastic and is produced by extrusion. Such a structure is easy to achieve in the extrusion process.

[0044] It should be noted that the number of sub-pedal 5, the number of pedal units possessed by the top pedal 3 and sub-pedal 5, the number of first riveting parts 3211 and first riveting parts 3222, and other features involving quantity are not limited to this embodiment.

[0045] Example 2

[0046] As shown in Figures 6-7, the difference between this embodiment and Embodiment 1 is that the riveting methods of the first connecting part 321 and the second connecting part 322 are different in this embodiment.

[0047] In this embodiment, the first connecting part 321 is provided with at least two symmetrical riveting holes along the length direction, and the second connecting part 322 is provided with at least two symmetrical riveting holes along the length direction. The riveting holes of the first connecting part 321 and the riveting holes of the second connecting part 322 are riveted together by rivets 7.

[0048] Example 3

[0049] As shown in Figures 8-9, the difference between this embodiment and Embodiment 1 is that the connecting part and the second connecting part 322 are connected by a bolt and nut. Specifically, the first connecting part 321 has at least two mutually symmetrical screw holes along its length, and the second connecting part 322 has at least two mutually symmetrical screw holes along its length; the bolt 9 passes through the screw holes of the first connecting part 321 and the screw holes of the second connecting part 322, and then the nut 8 is tightened to achieve the connection.

[0050] The above description is merely a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention by those skilled in the art within the scope of the technology disclosed in the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention. Industrial applicability

[0051] This invention provides a ladder-type tread, comprising at least two tread units. The top surface of each tread unit extends from one end in the width direction along the thickness direction to form a first connecting portion, and from the other end in the thickness direction to form a second connecting portion. The first connecting portions and the second connecting portions of two adjacent tread units are connected to each other, so that the tread units are spliced ​​along the width direction to form the ladder-type tread, which has industrial applicability.

Claims

1. A spliced step for a ladder, characterized by It includes at least two pedal units, including pedal unit A and pedal unit B. The top surface of pedal unit A extends along the thickness direction at one end in the width direction to form a first connecting part on the side, and the corresponding end of pedal unit B extends along the thickness direction to form a second connecting part on the side. The first connecting part and the second connecting part of the pedal unit described in A and B are connected to each other so that the pedal units are spliced ​​together along the width direction to form the spliced ​​pedal of the ladder; The first connecting part is provided with at least two first riveting parts that protrude along its thickness direction along its length direction, and the second connecting part is provided with at least two second riveting parts that are recessed along its thickness direction along its length direction, and the first riveting parts and the second riveting parts are press-fitted together. or: The first connecting part is provided with at least two riveting holes along the length direction, and the second connecting part is provided with at least two riveting holes along the length direction. The riveting holes of the first connecting part and the riveting holes of the second connecting part are riveted together by rivets. or: The first connecting part has at least two screw holes along its length, and the second connecting part has at least two screw holes along its length; the bolt passes through the screw holes of the first connecting part and the screw holes of the second connecting part and is connected to the nut.

2. The spliced step ladder of claim 1, wherein, The top of the second connecting part bends downward toward the first connecting part of the adjacent pedal unit to form a U-shaped hook, and the first connecting part extends upward to form an upward U-shaped limiting part, which extends into the U-shaped hook and engages with the U-shaped hook for limiting.

3. The modular step of the ladder according to claim 1 or 2, characterized in that... The bottom of the second connecting part extends outward to form an extension, which is roughly parallel to the top plane. The extension is bent to form a U-shaped base. The bottom end 3 of the first connecting part is inserted into the U-shaped base of the second connecting part, and the U-shaped base limits the bottom of the first connecting part.

4. The modular step of the ladder according to claim 1, characterized in that... The A pedal unit has a closed frame on the side away from the splice, with a depth similar to that of the first and second connecting parts. A small closed frame is provided approximately in the middle of the A and B pedal units.

5. The ladder's interlocking treads according to claim 1, 2, 3, or 4, characterized in that, It also includes a U-shaped package, which includes an upper side and a lower side disposed opposite to each other, and a side package connecting the upper side and the lower side.

6. The modular step of the ladder according to claim 5, characterized in that, The upper part has rivet holes at both ends, and the top surface of the pedal unit has rivet holes corresponding to the positions of the rivet holes on the upper part. The rivet holes on the upper part and the rivet holes on the top surface of the pedal unit are riveted together by rivets.

7. The modular step of the ladder according to claim 6, characterized in that, The bottom of the second connecting part extends outward to form an extension part. Rivet holes are provided at both ends of the extension part along the length direction. The lower part is provided with riveting holes that correspond one-to-one with the rivet holes of the extension part. The rivet holes of the lower part and the rivet holes of the extension part are riveted together by rivets.

8. A folding ladder, comprising a front ladder frame and a rear ladder frame, wherein two members of the front ladder frame are hingedly connected to two members of the rear ladder frame, characterized in that, The invention includes a series of interlocking pedals as described in any one of claims 1-7, wherein the pedals include a top pedal and a plurality of sub-pedales arranged sequentially along the height direction.

9. The folding ladder according to claim 8, characterized in that, The number of pedal units in the top pedal is greater than the number of sub-pedals; a first hinge is provided at the front end of the side encapsulation part, and the front ends of the top pedal and the sub-pedals are hinged to the rod of the front ladder frame through the first hinge.

10. The folding ladder according to claim 9, characterized in that, A second hinge is provided at the middle position of the top pedal and a second hinge is provided at the rear end of the sub-pedal; it also includes a side connecting rod, and the top pedal and the sub-pedal are hinged to the side connecting rod through the second hinge.

11. The folding ladder according to claim 10, characterized in that, It also includes a support rod, one end of which is hinged to the middle of the side connecting rod, and the other end of which is hinged to the middle of the rear ladder frame.

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