MULTIFUNCTION LADDER STRUCTURE

The present invention discloses multifunction ladder structures. The first embodiment includes a first ladder frame; a second ladder frame; and two combining assemblies that combine the second ladder frame with the first ladder frame. Another embodiment further includes an extension board, while a third embodiment includes two bolts set detachably fixed to the second ladder frame. With the implementation of the present invention, the multifunction ladder structures have the special benefit of being easy to install or operate; being able to insert and set firmly in between a tire and the wheel fender as a tire ladder; being able to stand firmly beside a car or other places as an A-shaped ladder; applying to tires of different size by adjusting the length of the foot rods; standing firmly on rough or inclined ground, roads or object surfaces; and with the adoption of the extension board, versatile applications are accomplished.

BACKGROUND OF THE INVENTION

1. Technical Field

The present invention relates to ladder structures, and more particularly, to multifunction ladder structures that can either be used as a tire ladder or as an A-shaped ladder and can be applied to a variety of types or models of cars.

2. Description of Related Art

Cars are widely used nowadays for transportation, everyday activities or in recreations, MPVs, SUVs or CUVs are getting more and more popular for choices of cars. With common characteristics and in nature, those vehicles are generally higher and are thus usually inconvenient when putting things on or fetching things from the top, or just attempting to clean it. Unpredictable dangers may sometimes unconsciously happen. A ladder, or more specifically, a tire ladder for car use then often provides an easy and popular solution.

While the tire ladders or ladders used on cars nowadays are mostly ladders of limited function that can either be used as a standing stairs or as a stairs leaning on the side of cars, and are either lacking structure stability in use or standing slipping or tumbling on rough or inclined roads. All those disadvantages generally lead to unpredictable danger and thus poor adoption to use, and eventually slow down the development of whole relating industry.

That results in the needs for innovative ladder structures that are easy to apply or operate; can be used as tire ladders putting stably on above a tire or in between the tire and its wheel fender; can be used as an A-shaped ladder standing firmly by a car or in other places; can be securely folded for transportation or storage; can be applied instantly on tires with different tread size and thus can be applied to almost all car types or car models; and more importantly, a ladder structure that can instantly stand firmly on rough or inclined ground, roads or object surfaces, thus provide not only a great innovation and improvements to car application and relating industries, but also a more convenient and safer use of cars.

SUMMARY OF THE INVENTION

The present invention discloses multifunction ladder structures. The first embodiment includes a first ladder frame; a second ladder frame; and two combining assemblies that combine the second ladder frame with the first ladder frame. Another embodiment further includes an extension board, while a third embodiment includes two bolts set detachably fixed to the second ladder frame. With the implementation of the present invention, the multifunction ladder structures have the special benefit of being easy to install or operate; being able to insert and set firmly in between a tire and the wheel fender as a tire ladder; being able to stand firmly beside a car or other places as an A-shaped ladder; applying to tires of different size by adjusting the length of the foot rods; standing firmly on rough or inclined ground, roads or object surfaces; and with the adoption of the extension board, versatile applications are accomplished.

The present invention provides a multifunction ladder structure, comprising: a first ladder frame, includes: a top rod, which is a U-shaped tube; two first frame tubes, each being fixed firmly on an different end of said top rod and contains a foot rod on the other end; at least one first stepping unit, being connected firmly in between and joining said two first frame tubes; and two first buckling units, each being fixed firmly on one said first frame tube; a second ladder frame, includes: two second frame tubes, each being set in relative and next to a said first frame tube and contains a foot rod on one end; two second buckling units, each being fixed firmly on one said second frame tube; and at least one stepping unit, being connected firmly in between and joining said two second frame tubes; and two combining assemblies, each being connected to a meeting position of the top rod and a first frame tube, wherein the two combining assemblies combine the second ladder frame to the first ladder frame.

The present invention further provides a multifunction ladder structure, comprising: a first ladder frame, includes: a top rod, which is a U-shaped tube; two first frame tubes, each being fixed firmly on an different end of said top rod and contains a foot rod on the other end; at least one first stepping unit, being connected firmly in between and joining said two first frame tubes; and two first buckling units, each being fixed firmly on one said first frame tube; a second ladder frame, includes: two second frame tubes, each being set in relative and next to a said first frame tube and contains a foot rod on one end; two second buckling units, each being fixed firmly on one said second frame tube; and at least one stepping unit, being connected firmly in between and joining said two second frame tubes; two combining assemblies, each being connected to a meeting position of the top rod and a first frame tube, wherein the two combining assemblies combine the second ladder frame to the first ladder frame; and an extension board, set hooked to said first ladder frame at a first edge and detachably linked to said second frame tubes with two linking means.

The present invention further provides a multifunction ladder structure, comprising: a first ladder frame, includes: a top rod, which is a U-shaped tube; two first frame tubes, each being fixed firmly on an different end of said top rod and contains a foot rod on the other end; at least one first stepping unit, being connected firmly in between and joining said two first frame tubes; and two first buckling units, each being fixed firmly on one said first frame tube; a second ladder frame, includes: two second frame tubes, each being set in relative and next to a said first frame tube and contains a foot rod on one end; two second buckling units, each being fixed firmly on one said second frame tube; and at least one stepping unit, being connected firmly in between and joining said two second frame tubes; two combining assemblies, each being connected to a meeting position of the top rod and a first frame tube, wherein the two combining assemblies combine the second ladder frame to the first ladder frame; and two bolts, each set detachably fixed to a said second frame tubes.

Implementation of the present invention at least involves the following inventive steps:1. Easy to set up or to operate.2. Can be used as a tire ladder putting stably on above a tire or in between the tire and its wheel fender.3. Can be used as an A-shaped ladder standing firmly by a car or in other places.4. The multifunction ladder structures can be securely folded for transportation or storage.5. Each foot rod can be adjusted separately that makes multifunction ladder structures being able to be applied instantly on tires with different tread size and thus can be applied to almost all car types or car models.6. With length adjustable foot rods, the multifunction ladder structures can stand firmly on rough or inclined ground, roads or object surfaces.

The features and advantages of the present invention are detailed hereinafter with reference to the preferred embodiments. The detailed description is intended to enable a person skilled in the art to gain insight into the technical contents disclosed herein and implement the present invention accordingly. In particular, a person skilled in the art can easily understand the objects and advantages of the present invention by referring to the disclosure of the specification, the claims, and the accompanying drawings.

DETAILED DESCRIPTION OF THE EMBODIMENTS OF THE INVENTION

Embodiments together with illustrating graphs reference are provided hereafter for further understanding and recognizing of the realization of the present invention.

Please refer toFIG.1, in an embodiment of the present invention, is a multifunction ladder structure100that comprises a first ladder frame10; a second ladder frame20; and two combining assemblies30.

Please refer toFIG.1, the first ladder frame10of the multifunction ladder structure100includes a top rod11, two first frame tubes12, at least one first stepping unit13, and two first buckling units14. Wherein said top rod11, being a U-shaped tube, can be made of metal tube, alloy tube or a tube made of one of durable polymer materials.

As can be seen inFIG.1, the first frame tubes12that are aligned to a same direction are formed in a way that each first frame tube12connects in one end to a different end of the top rod11, and contains a foot rod50on the other end. Further, an included angle is also formed between each of the first frame tubes12and the U-shaped top rod11.

As for the forming material of the first frame tubes12, same forming material that forms the U-shaped top rod11can be chosen, and in a performing embodiment, the first frame tubes12can be integrated in one piece together with the top rod11. And at the same time, the two first frame tubes12can be formed aligned parallel to each other, or aligned nearly parallel to each other.

As shown inFIG.1, the distance between the two first frame tubes12can be formed that with the foot rods50pointing at a tire, the first ladder frame10inserts freely in the space in between the tire and its wheel fender and rest on the tire.

Please refer again toFIG.1, at least one first stepping unit13is being connected firmly in between and joins the two first frame tubes12, wherein the first stepping unit13can be a stepping pedal formed by a sturdy mesh tread, a sturdy tread pedal, a sturdy tread pedal with plural through holes, or at least two tubes placed in parallel to each other to form a sturdy tread surface for stepping on. Further, for safer use in applications, the first stepping unit13can be formed of an anti-slip material.

As also shown inFIG.1, the first buckling units14are formed such that each being connected to or fixed firmly on a first frame tube12. Said first buckling units14can be a linking rod, a hook, a bendable linking rod, a bendable hook, or a webbing ribbon with at least a buckle or a buttonhole.

Please refer again toFIG.1, the second ladder frame20of the multifunction ladder structure100includes two second frame tubes21, two second buckling units22, and at least one stepping unit23.

As shown inFIG.1, the second frame tubes21are set corresponding to the first frame tubes12and can also be sturdy tubes. The second frame tubes21can also be aligned parallel or nearly parallel to each other. Further, a foot rod50is being connected at one end of each second frame tube21.

As for the thickness or size of each second frame tube21, same thickness value or size as the corresponding first frame tube12can be chosen. While the distance of the two second frame tubes21at any position can also be chosen to be same as the distance of the two first frame tubes12at a corresponding position.

As also shown inFIG.1, the second buckling units22are formed such that each second buckling unit22being fixed firmly on a second frame tube21, and in the multifunction ladder structure100, each said second buckling unit22is either linked together with or detached from a corresponding first buckling unit14.

That is to say, the second ladder frame20can be further connected with the first ladder structure10with the two second buckling units22being linking together with the two corresponding first buckling units14.

Please refer again toFIG.1, the stepping unit23, being a tube connected firmly in between and joining the two second frame tubes21, can be used as a stepping stair of the second ladder frame20.

Please refer toFIG.1, the two combining assemblies30of the multifunction ladder structure100, each being connected to a meeting position of the top rod11and a first frame tube12, combine the second ladder frame20to the first ladder frame10in a way that the second ladder frame20being either rotating at the combining assemblies30relative to the first ladder frame10, or the second ladder frame20being connected firmly on the first ladder frame10at the combining assemblies30.

As such, the multifunction ladder structure100is formed when combining the second ladder frame20with the first ladder frame10by the combining assemblies30. The second ladder frame20is then firmly fixed after rotating at the combining assemblies30with a required included angle with the first ladder frame10to make the multifunction ladder structure100a tire ladder or an A-shaped ladder.

Wherein the combining method can be that the second ladder frame20is riveted or screwed to the combining assemblies30and is able to rotate at the combining assemblies30or is securely fixed at the combining assemblies30to the first ladder frame10.

Next, please refer toFIG.2, is an embodiment of a multifunction ladder structure200, comprising: a multifunction ladder structure100and an extension board210. The extension board210is set hooked to the first ladder frame10at a first edge211and detachably linked to the second frame tubes21with two linking means220.

Then as shown inFIG.3, each of the linking means220can be detachably fixed to a second frame tube21with a bolt230. With the connection using the bolt230, benefits can be achieved, such as, safer connection of the first ladder frame10and the second ladder frame20can be achieved; when the end portion of the bolt230is painted, proper connection can be assured; the extension board can be properly supported to increase the durable weight; and quick transforming between ladder application and tire table application.

Please refer toFIG.4, is another embodiment of a multifunction ladder structure300, comprising: a multifunction ladder structure100and two bolts230, each bolt230is set detachably fixed to a said second frame tubes21.

As shown inFIG.4andFIG.5, an extension board210can be set hooked to the first ladder frame10at a first edge211and detachably linked to said second frame tubes21with two linking means220, wherein each linking means220is detachably fixed to a second frame tube21by a bolt230.

The benefit of the extension board210is to provide additional table area, while the benefits of using bolts230are as discussed previously.

Please refer toFIG.6A,FIG.6BandFIG.6C, each foot rod50of the multifunction ladder structure100, or of the multifunction ladder structure200, or of the multifunction ladder structure300, can be extendable in length. Especially, when each foot rod50is independently extending or remaining still in a certain position in a first frame tube12or in a second frame tube21, making the multifunction ladder structure100, the multifunction ladder structure200or the multifunction ladder structure300capable of standing firmly even on rough or inclined ground, roads or object surfaces; and applying better on tires of different size or with different tread size, and thus can applies to almost all car types or models.

Next, please refer toFIG.7AtoFIG.8C, the multifunction ladder structure100, the multifunction ladder structure200or the multifunction ladder structure300, each can further contain a fit rod90detachably fixed across the foot rods50of the first frame tubes12. Then the fit rod90can be locked securely on a backdoor hook of a car with a lock piece91.

With the locking from the fit rod90that is fixed across the foot rods50of the first frame tubes12, to the backdoor hook of a car, the whole multifunction ladder structure100or the multifunction ladder structure200or the multifunction ladder structure300is locked to the backdoor hook of a car. Together with proper choice of the length of the foot rods50of the second frame tubes21, the multifunction ladder structure100or the multifunction ladder structure200or the multifunction ladder structure300becomes a convenient table extends out from back of the car.

While as shown inFIG.9AtoFIG.9C, in two multifunction ladder structures100or multifunction ladder structures200or multifunction ladder structures300, the foot rods50of the first frame tubes12can be removed. Then the two multifunction ladder structures100or multifunction ladder structures200or multifunction ladder structures300are connected together at the first frame tubes12.

In the embodiments as shown inFIG.9AtoFIG.9C, the two multifunction ladder structures100or the two multifunction ladder structures200or the two multifunction ladder structures300connected together then stand with the foot rods50of the second frame tubes21as an extended table.

Further as shown inFIG.10AtoFIG.11C, a board110or a stove shelf120can further be set or hung on the connected first frame tubes12for extensive applications.

In conclusion, as shown in the embodiments and in the illustrating figuresFIG.1toFIG.11C, with the special improved structural characteristics, multiple improvements as follows, which cannot be achieved by known existing solutions, can be achieved by the multifunction ladder structure100or multifunction ladder structure200or multifunction ladder structure300of the present invention: being easy to set up or to operate; can be used as a tire ladder putting stably on above a tire or in between the tire and its wheel fender; can be used as an A-shaped ladder standing firmly by a car or in other places; and each of the foot rods50can be adjusted separately to make the multifunction ladder structure100or multifunction ladder structure200or multifunction ladder structure300being able to be applied instantly on tires with different tread size and thus can be applied to almost all car types or models, and being able to stand further firmly on rough or inclined ground, roads or object surfaces; and thus increase the practicality and convenience of using of the multifunction ladder structure100or multifunction ladder structure200or multifunction ladder structure300.

The embodiments described above are intended only to demonstrate the technical concept and features of the present invention to enable a person skilled in the art to understand and implement the contents disclosed herein. It is understood that the disclosed embodiments are not to limit the scope of the present invention. Therefore, all equivalent changes or modifications based on the concept of the present invention should be encompassed by the appended claims.