A ladder that can be hooked onto a truck

Abstract

Provide a ladder that can be hooked onto the truck. The present invention provides a ladder 1 that can be hooked onto a truck having a frame 10 and a number of steps 121. The frame has two opposing sides 101, and each of the steps is pivotally connected to the two sides of the frame. Each of the two sides of the frame has a hook 1015 configured to hook the ladder onto the truck.

Description

[Technical field]

[0001] TECHNICAL FIELD This disclosure relates to a ladder that can be hooked to a truck, and more particularly to a ladder that can be hooked to the bed of a truck so that a worker can climb the ladder to and from the bed of the truck. [Background technology]

[0002] Trucks, particularly cargo trucks, often require workers to climb onto and off the bed to perform loading and unloading operations, check the condition of the cargo, or perform other related tasks. However, conventional truck installations typically lack a convenient and safe means for workers to climb onto and off the bed. Workers must climb onto or jump off the truck bed without the aid of proper equipment, which is not only time-consuming but also potentially dangerous, easily leading to accidents such as falls and injuries.

[0003] In the prior art, some trucks are equipped with fixed steps or ladders, but these devices are usually relatively simple in design and lack flexibility. The fixed design cannot be adjusted to meet different work needs, and when not in use, these devices may get in the way and increase the inconvenience of truck work.

[0004] In summary, the present disclosure aims to solve problems existing in the prior art, improve the safety and convenience of truck operations, and provide an improved ladder design that meets the diverse needs of modern trucking operations. Summary of the Invention [Means for solving the problem]

[0005] The present disclosure provides a ladder that can be hooked onto a truck having a frame and a number of steps, the frame having two opposing sides, each of the number of steps pivotally connected to the two sides of the frame, each of the two sides of the frame having a hook configured to hook the ladder onto the truck.

[0006] Aspects of the present disclosure will be better understood by referring to the following embodiments in conjunction with the accompanying drawings, in which: It should be noted that, in accordance with standard industry practice, each component has not been drawn to scale, and in fact, the dimensions of each component may be arbitrarily increased or decreased for clarity of illustration. [Brief description of the drawings]

[0007] [Figure 1A] FIG. 1 is a schematic three-dimensional view showing a ladder that can be hooked onto a truck in an unfolded state in one embodiment of the present disclosure. [Figure 1B] FIG. 1 is a schematic front view showing a ladder that can be hooked onto a truck in an unfolded state in one embodiment of the present disclosure. [Figure 1C] FIG. 1C is a schematic cross-sectional view taken along line AA in FIG. 1B. [Figure 2A] FIG. 1 is a schematic three-dimensional view showing a ladder that can be hooked onto a truck in a folded state in one embodiment of the present disclosure. [Figure 2B] FIG. 1 is a schematic side view showing a ladder that can be hooked onto a truck in a folded state in one embodiment of the present disclosure. [Diagram 3] FIG. 1 is a schematic diagram of a ladder hooked to a truck in one embodiment of the present disclosure. [Figure 4A] FIG. 1 is a schematic three-dimensional view showing a ladder that can be hooked onto a truck in an unfolded state in one embodiment of the present disclosure. [Figure 4B] FIG. 1 is a schematic front view showing a ladder that can be hooked onto a truck in an unfolded state in one embodiment of the present disclosure. [Figure 4C]FIG. 4C is a schematic cross-sectional view taken along line BB in FIG. 4B. [Figure 5A] FIG. 1 is a schematic three-dimensional view showing a ladder that can be hooked onto a truck in a folded state in one embodiment of the present disclosure. [Figure 5B] FIG. 1 is a schematic side view showing a ladder that can be hooked onto a truck in a folded state in one embodiment of the present disclosure. [Figure 6] FIG. 1 is a schematic diagram of a ladder hooked to a truck in one embodiment of the present disclosure. [Figure 7A] FIG. 1 is a schematic three-dimensional view showing a ladder that can be hooked onto a truck in an unfolded state in one embodiment of the present disclosure. [Figure 7B] FIG. 1 is a schematic three-dimensional view showing a ladder that can be hooked onto a truck in a folded state in one embodiment of the present disclosure. [Figure 8A] FIG. 1 is a schematic three-dimensional view showing a ladder that can be hooked onto a truck in an unfolded state in one embodiment of the present disclosure. [Figure 8B] FIG. 1 is a schematic three-dimensional view showing a ladder that can be hooked onto a truck in a folded state in one embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, the present disclosure provides many different embodiments or examples for implementing different features of the subject matter. To simplify the present disclosure, specific examples of elements and configurations are described below. Of course, these are merely examples and are not intended to be limiting. For example, in the following description, "forming a first member above or on a second member" may include embodiments in which the first member and the second member are in direct contact with each other, and may also include embodiments in which an additional member may be formed between the first member and the second member such that the first member and the second member are not in direct contact with each other. In addition, the present disclosure may repeat the symbols and / or letters of elements in various examples. This repetition is for the purpose of brevity and clarity, and does not in itself indicate a relationship between the various embodiments and / or configurations described.

[0009] Spatial terms such as "below," "below," "under," "above," "on," "above" and the like are used herein to facilitate the description of the relationship of an element or component illustrated in the drawings to one or more other elements or components. Spatial terms are intended to encompass other orientations of the device during use or operation in addition to the orientation depicted in the drawings. The device may be otherwise oriented (i.e., rotated 90 degrees or to other orientations), in which case the spatial terms used herein should be interpreted accordingly.

[0010] Terms such as "first", "second" and "third" may be used herein to describe various elements, components, regions, layers and / or sections, but these elements, components, regions, layers and / or sections should not be limited by these terms. These terms may be used merely to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second" and "third" as used herein do not imply any sequence or order unless the context clearly dictates otherwise.

[0011] As used herein, the terms "nearly," "substantially," "substantial," and "about" are used to describe and interpret small variations. When used in conjunction with an event or circumstance, the term can refer to cases where the event or circumstance occurs exactly, as well as cases where the event or circumstance occurs very similarly. For example, when used in conjunction with a numerical value, the term can refer to a variation range of ±10% or less of the numerical value, such as ±5% or less, ±4% or less, ±3% or less, ±2% or less, ±1% or less, ±0.5% or less, ±0.1% or less, ±0.05% or less. Two values ​​can be considered "substantially" the same or equal if the difference between them is ±10% or less of the average of either of these values ​​(e.g., ±5% or less, ±4% or less, ±3% or less, ±2% or less, ±1% or less, ±0.5% or less, ±0.1% or less, ±0.05% or less). For example, "substantially" parallel may include an angle variation range of ±10° or less, e.g., ±5° or less, ±4° or less, ±3° or less, ±2° or less, ±1° or less, ±0.5° or less, ±0.1° or less, or ±0.05° or less, relative to 0°. For example, "substantially" perpendicular may include an angle variation range of ±10° or less, e.g., ±5° or less, ±4° or less, ±3° or less, ±2° or less, ±1° or less, ±0.5° or less, ±0.1° or less, or ±0.05° or less, relative to 90°.

[0012] The needs of modern trucking business are becoming more and more diverse, and the working environment is becoming more and more complicated, so there is a need to provide a safe and convenient device for workers to efficiently and safely climb up and down the truck bed. In response to this need, the present disclosure proposes a ladder that can be hooked onto the truck bed, which allows workers to easily climb up and down the bed.

[0013] This design not only enhances work convenience and safety, but also allows the ladder to be attached and detached whenever needed, providing a high degree of flexibility and adapting to different work scenarios. Moreover, the ladder is designed for easy storage and transportation, and can be easily stowed when not in use, reducing the impact on other functions of the truck.

[0014] FIG. 1A is a schematic three-dimensional view of a ladder 1 that can be hooked to a truck in an unfolded state in an embodiment of the present disclosure. FIG. 2A is a schematic three-dimensional view of a ladder 1 that can be hooked to a truck in a folded state in an embodiment of the present disclosure. As can be seen from FIG. 1A and FIG. 2A, the ladder 1 can be unfolded, and the ladder is stable at this time, which is convenient for users to climb onto the truck bed to work. The ladder 1 can also be folded, and in this state, each part of the ladder is cleverly designed to be folded tightly, greatly reducing the overall volume, which is convenient for storage in a designated place or other storage space of the truck, and does not affect other functions or running of the truck.

[0015] Referring to FIG. 1A, and also referring to FIG. 1B and FIG. 1C, which are respectively a schematic front view and a schematic cross-sectional view along line AA of FIG. 1B, showing a ladder 1 that can be hooked onto a truck in an unfolded state in an embodiment of the present disclosure, the ladder 1 comprises a frame 10, handrail bars 111, 112, and rungs 121, 122. The frame 10 has a side 101 and a side 102 opposite to the side 101. In some embodiments of the present disclosure, the sides 101, 102 comprise hollow tubular materials. In some embodiments of the present disclosure, the length of the sides 101, 102 is about 883 mm, so that the height of the frame 10 is about 833 mm. It should be noted that in some embodiments of the present disclosure, the width of the frame 10 is about 595.6 mm.

[0016] The handrail bar 111 is connected to the side 101 of the frame 10, and the handrail bar 112 is connected to the other side 102 of the frame 10. As shown in FIG. 1A, FIG. 1B, and FIG. 1C, these handrail bars 111, 112 are generally elongated, and the original design intent is to enable the worker to firmly grasp these handrail bars 111, 112 when climbing the ladder 1, thereby improving stability and safety during the climbing process. The handrail bars 111, 112 not only have an easy-to-grip outer shape, but also take into consideration the selection of materials. In some embodiments of the present disclosure, the handrail bars 111, 112 can be made of iron pipes, and such a material selection ensures that the handrail bars themselves have sufficient strength and durability, and the handrail bars will not bend or deform when the worker climbs or grabs them. This design not only takes into consideration the ease of use of the worker, but also improves the stability of the entire structure, providing a safe and reliable climbing environment.

[0017] The handrail bar 111 is configured to slide against the side 101 of the frame 10, and the handrail bar 112 is configured to slide against the side 102 of the frame 10. When the handrail bar 111 slides upward against the side 101 of the frame 10, it extends from the end 1011 of the side 101 and extends upward to provide a stable climbing support to the user (FIGS. 1A, 1B, 1C). Similarly, the handrail bar 111 can also slide downward against the side 101 of the frame 10 and retract into the end 1011 of the side 101, allowing the handrail bar 111 to nest inside the hollow tube of the side 101 of the frame 10 (FIGS. 2A, 2B).

[0018] The design of the handrail bar 112 is similar to that described above, and when slid upward against the side 102 of the frame 10, the handrail bar 112 extends out from the end 1021 of the side 102, extending upward to provide additional climbing support (FIGS. 1A, 1B, 1C). When the handrail bar 112 is slid downward against the side 102 of the frame 10, the handrail bar 112 retracts into the end 1021 of the side 102, nesting inside the hollow tube of the side 102 of the frame 10 (FIGS. 2A, 2B).

[0019] In some embodiments of the present disclosure, when the handrail bars 111, 112 are fully extended from the ends 1011, 1021 of the sides 101, 102, the length of the handrail bars 111, 112 is approximately less than the height of the frame 10. In some embodiments of the present disclosure, when the handrail bars 111, 112 are fully extended from the ends 1011, 1021 of the sides 101, 102, the length of the handrail bars 111, 112 is approximately 653.5 mm.

[0020] In some embodiments of the present disclosure, the handrail bars 111, 112 include opening and closing mechanisms 113, 114 that are designed and configured to allow the handrail bars 111, 112 to slide relative to the sides 101, 102 of the frame 10. In some embodiments of the present disclosure, these opening and closing mechanisms 113, 114 include trigger buttons 1131, 1141 that allow an operator to control the sliding of the handrail bars 111 and 112 by pressing these trigger buttons 1131, 1141 to activate the opening and closing mechanisms 113, 114.

[0021] For example, when the handrail bars 111, 112 are retracted into the sides 101, 102 of the frame 10, the operator presses the trigger buttons 1131, 1141 to activate the opening and closing mechanisms 113, 114, so that the handrail bars 111, 112 can slide upward and extend from the ends 1011, 1021 of the sides 101, 102. Similarly, when the handrail bars 111, 112 are in a state in which they extend from the sides 101, 102 of the frame 10, the operator can press the trigger buttons 1131, 1141 again to activate the opening and closing mechanisms 113, 114, so that the handrail bars 111, 112 can slide downward and be retracted into the sides 101, 102.

[0022] In some embodiments of the present disclosure, the opening / closing mechanism 113 and the trigger button 1131 are provided on the handrail bar 111 and are located at approximately the end 1110 of the handrail bar 111, away from the frame 10. To prevent an operator from accidentally touching the trigger button 1131, the opening / closing mechanism 113 is further provided with a movable cover 1132, which can movably cover the trigger button 1131. Similarly, the opening / closing mechanism 114 and the trigger button 1141 are provided on the handrail bar 112 and are located at approximately the end 1120 of the handrail bar 112, away from the frame 10. The opening / closing mechanism 114 is also provided with a movable cover 1142 that covers the trigger button 1141, to prevent an operator from accidentally touching the trigger button.

[0023] In some embodiments of the present disclosure, the handrail bar 111 is further provided with a guard member 115 located near the end 1110 of the handrail bar 111 remote from the frame 10. In some embodiments of the present disclosure, the guard member 115 is provided below the opening and closing mechanism 113 and has a flange close to the opening and closing mechanism 113. When the handrail bar 111 is retracted into the side edge 101 of the frame 10, the flange of the guard member 115 substantially abuts against the end 1011 of the side edge 101 of the frame 10 to provide a protective effect.

[0024] Similarly, in some embodiments of the present disclosure, the handrail bar 112 is further provided with a guard member 116 located near an end 1120 of the handrail bar 112 remote from the frame 10. In some embodiments of the present disclosure, the guard member 116 is provided below the opening and closing mechanism 114 and includes a flange close to the opening and closing mechanism 114. When the handrail bar 112 is retracted into the side edge 102 of the frame 10, the flange of the guard member 116 approximately abuts against the end 1021 of the side edge 101 of the frame 10.

[0025] The design of the guard members 115, 116 aims to provide additional security by preventing the operator's hands from being pinched between the opening and closing mechanisms 113, 114 of the handrail bars 111, 112 and the ends 1011, 1021 of the sides 101, 102 of the frame 10 during the operation. When the operator slides the handrail bars 111, 112 into the sides 101, 102 of the frame 10 to retract them, the guard members 115, 116 can effectively prevent accidental pinching and improve the overall safety of the operation.

[0026] 1A and 1B, steps 121, 122 are provided between sides 101, 102 of frame 10. Step 121 is pivotally connected to sides 101, 102 of frame 10 and is therefore configured to pivotally rotate relative to frame 10. In this manner, step 121 can be deployed relative to frame 10 (FIGS. 1A, 1B, and 1C) and folded within frame 10 when not in use (FIGS. 2A and 2B).

[0027] Similarly, step 122 is pivotally coupled to sides 101, 102 of frame 10 and is therefore configured to pivotally rotate relative to frame 10. In this manner, step 122 can be deployed relative to frame 10 (FIGS. 1A, 1B, and 1C) and folded within frame 10 when not in use (FIGS. 2A and 2B).

[0028] This design allows the steps 121, 122 to fold tightly within the frame 10 when not in use to save space, and can also be quickly deployed when needed to provide a stable step for a user to climb or stand on.

[0029] In some embodiments of the present disclosure, the steps 121, 122 have a width of about 450 mm. In some embodiments of the present disclosure, the length of the step 121 is substantially less than the length of the step 122 (FIG. 1C). In some embodiments of the present disclosure, the length of the step 121 is about 205.8 mm and the length of the step 122 is about 265.4 mm.

[0030] The frame 10 further includes links 123, 124 configured to connect the steps 121 and 122 to each other. In this manner, the steps 121, 122 can realize simultaneous rotation via the links 123, 124. For example, when an operator pivots the step 121 relative to the frame 10, the links 123, 124 simultaneously drive the step 122, causing the step 122 to also rotate relative to the frame 10 simultaneously.

[0031] The frame 10 further includes ties 125, 126 configured to connect the step 121 to the sides 101, 102 of the frame 10. The ties 125, 126 are configured to limit further rotation of the step 121 once it has rotated to a predetermined angle. For example, when the step 121 has rotated to form an angle of approximately 90 degrees between the sides 101, 102 of the frame 10 (FIG. 1C), the ties 125, 126 prevent the step 121 from continuing to rotate, thereby preventing the angle between the step 121 and the sides 101, 102 of the frame 10 from exceeding 90 degrees.

[0032] As described above, the links 123, 124 connect the steps 121, 122 to each other and allow the steps 121, 122 to rotate simultaneously via the links 123, 124. Thus, the ties 125, 126 also restrict the step 122 from continuing to rotate after it has rotated to the predetermined angle, ensuring the stability and safety of the steps 121, 122 during use.

[0033] In some embodiments of the present disclosure, the step 121 has an anti-slip pad 1211, and the step 122 has an anti-slip pad 1221. The anti-slip pads 1211, 1221 can increase the friction between the worker's feet and the steps 121, 122, and increase the stability of the worker climbing the ladder 1.

[0034] Additionally, the side 101 of the frame 10 is provided with a hook 1015, and the side 102 is provided with a hook 1016. In some embodiments of the present disclosure, the hook 1015 is near the end 1011 of the side 101 of the frame 10, and the hook 1016 is near the end 1021 of the side 102 of the frame 10. The hooks 1015, 1016 can be hooked onto a truck, and are particularly designed to hook onto the edge of the bed of the truck. In this way, the ladder 1 can be stably hooked onto the truck via the hooks 1015, 1016, providing a safe and convenient way for workers to climb.

[0035] FIG. 3 is a schematic diagram showing the ladder 1 hooked on the truck 2 in the embodiment of the present disclosure. As shown in FIG. 3, when the ladder 1 is in an unfolded state, the handrail bars 111, 112 extend from the frame 10 and rotate to a state in which the rungs 121, 122 form an angle of about 90 degrees with the sides 101, 102 of the frame 10. The ladder 1 can be stably hooked on the truck 2 through the hooks 1015, 1016, and in particular, can be hooked on the loading platform 21 of the truck 2. Referring to FIG. 3, when the ladder 1 is in an unfolded state and hooked on the loading platform 21 of the truck 2, the frame 10 of the ladder 1 extends downward from the loading platform 21 of the truck 2 to bring the bottom close to the ground, and the handrail bars 111, 112 extend upward from the loading platform 21. With this design, an operator can safely climb the ladder 1 to ascend and descend to the bed 21 of the truck 2, and the handrail bars 111, 112 provide firm support, enhancing safety and stability during the climbing process.

[0036] When the ladder 1 is not in use, the worker retracts the handrail bars 111, 112 into the sides 101, 102 of the frame 10 of the ladder 1, and rotates the rungs 121, 122 to store them in the frame 10. This design can effectively reduce the overall volume of the ladder 1, making it easier to store and carry the ladder 1, thereby improving the convenience and flexibility of use.

[0037] FIG. 4A is a schematic three-dimensional view of the ladder 3 that can be hooked to a truck in an unfolded state in an embodiment of the present disclosure. FIG. 5A is a schematic three-dimensional view of the ladder 3 that can be hooked to a truck in a folded state in an embodiment of the present disclosure. As can be seen from FIG. 4A and FIG. 5A, the ladder 3 can be unfolded, and the ladder is stable at this time, which is convenient for users to climb onto the truck bed to work. The ladder 3 can also be folded, and in this state, each part of the ladder is cleverly designed to be folded tightly, greatly reducing the overall volume, which is convenient for storage in a designated place or other storage space of the truck, and does not affect other functions or running of the truck.

[0038] Referring to FIG. 4A, and also referring to FIG. 4B and FIG. 4C, which are respectively a schematic front view and a schematic cross-sectional view along line BB in FIG. 4B, showing a ladder 3 that can be hooked to a truck in an unfolded state in an embodiment of the present disclosure, the ladder 3 includes a frame 30, handrail bars 311, 312, and rungs 321, 322, 323. The frame 30 has a side 301 and a side 302 opposite to the side 301. In some embodiments of the present disclosure, the sides 301, 302 include hollow tubes. In some embodiments of the present disclosure, the length of the sides 301, 302 is about 1185 mm, so that the height of the frame 30 is about 1185 mm. Note that in some embodiments of the present disclosure, the width of the frame 30 is about 595.6 mm.

[0039] The handrail bar 311 is connected to the side 301 of the frame 30, and the handrail bar 312 is connected to the other side 302 of the frame 30. The handrail bar 311 includes an opening / closing mechanism 313 and a guard member 315, and the opening / closing mechanism 313 includes a trigger button 3131 and a movable cover 3132. The handrail bar 312 includes an opening / closing mechanism 314 and a guard member 316, and the opening / closing mechanism 314 includes a trigger button 3141 and a movable cover 3142. In some embodiments of the present disclosure, the structure of the handrail bar 311 is the same as or similar to the structure of the handrail bar 111, and the structural relationship between the handrail bar 311 and the side 301 of the frame 30 is the same as or similar to the structural relationship between the handrail bar 111 and the side 101 of the frame 10. In some embodiments of the present disclosure, the structure of the handrail bar 312 is the same as or similar to the structure of the handrail bar 112, and the structural relationship between the handrail bar 312 and the side 302 of the frame 30 is the same as or similar to the structural relationship between the handrail bar 112 and the side 102 of the frame 10.

[0040] 4A and 4B, steps 321, 322, 323 are provided between sides 301 and 302 of frame 30. Step 321 is pivotally connected to sides 301, 302 of frame 30 and is therefore configured to pivotally rotate relative to frame 30. In this manner, step 321 can be deployed relative to frame 30 (FIGS. 4A, 4B, and 4C) and folded within frame 30 when not in use (FIGS. 5A and 5B).

[0041] Similarly, step 322 is pivotally coupled to sides 301, 302 of frame 30 and is therefore configured to pivotally rotate relative to frame 30. In this manner, step 322 can be deployed relative to frame 30 (FIGS. 4A, 4B, and 4C) and folded within frame 30 when not in use (FIGS. 5A and 5B).

[0042] Similarly, step 323 is pivotally coupled to sides 301, 302 of frame 30 and is therefore configured to pivotally rotate relative to frame 30. In this manner, step 323 can be deployed relative to frame 30 (FIGS. 4A, 4B, and 4C) and folded within frame 30 when not in use (FIGS. 5A and 5B).

[0043] This design allows the steps 321, 322, 323 to fold tightly within the frame 30 when not in use to save space, and can also be quickly deployed when needed to provide a stable step for a user to climb or stand on.

[0044] In some embodiments of the present disclosure, steps 321, 322, 323 have a width of about 450 mm. In some embodiments of the present disclosure, the length of step 321 is substantially less than the length of step 322 (FIG. 4C). In some embodiments of the present disclosure, the length of step 322 is substantially less than the length of step 323 (FIG. 4C). In some embodiments of the present disclosure, the length of step 321 is about 205.7 mm, the length of step 322 is about 235.8 mm, and the length of step 323 is about 280.4 mm.

[0045] The frame 30 further includes links 327, 328 configured to connect the steps 321, 322, and 323 to each other. In this manner, the steps 321, 322, and 323 can realize simultaneous rotation via the links 327, 328. For example, when an operator pivots the step 321 relative to the frame 30, the links 327, 328 drive the steps 322, 323 simultaneously, so that the steps 322 and 323 also rotate relative to the frame 30 simultaneously.

[0046] The frame 30 further includes tethers 325, 326 configured to connect the step 321 to the sides 301, 302 of the frame 30. The tethers 325, 326 are configured to limit further rotation of the step 321 once it has rotated to a predetermined angle. For example, when the step 321 has rotated to form an angle of approximately 90 degrees between the sides 301, 302 of the frame 30 (FIG. 4C), the tethers 325, 326 prevent the step 321 from continuing to rotate, thereby preventing the angle between the step 321 and the sides 301, 302 of the frame 30 from exceeding 90 degrees.

[0047] As described above, the links 327, 328 connect the steps 321, 322, and 323 to each other and allow the steps 321, 322, and 323 to rotate simultaneously via the links 327, 328. Thus, the ties 325, 326 also restrict the steps 322, 323 from continuing to rotate after they have rotated to the predetermined angle, ensuring the stability and safety of the steps 321, 322, and 323 during use.

[0048] In some embodiments of the present disclosure, the step 321 has an anti-slip pad 3211, the step 322 has an anti-slip pad 3221, and the step 323 has an anti-slip pad 3231. The anti-slip pads 3211, 3221, 3231 can increase the friction between the worker's feet and the steps 321, 322, 323, and increase the stability of the worker climbing the ladder 3.

[0049] Also, the side 301 of the frame 30 is provided with a hook 3015, and the side 302 is provided with a hook 3016. In some embodiments of the present disclosure, the hook 3015 is near the end 3011 of the side 301 of the frame 30, and the hook 3016 is near the end 3021 of the side 302 of the frame 30. The hooks 3015, 3016 can be hooked onto a truck, and are particularly designed to hook onto the edge of the bed of the truck. In this way, the ladder 3 can be stably hooked onto the truck via the hooks 3015, 3016, providing a safe and convenient way for workers to climb.

[0050] FIG. 6 is a schematic diagram showing the ladder 3 hooked on the truck 4 in the embodiment of the present disclosure. As shown in FIG. 6, when the ladder 3 is in an unfolded state, the handrail bars 311, 312 extend from the frame 30 and rotate to a state where the rungs 321, 322, 323 form an angle of about 90 degrees with the sides 301, 302 of the frame 30. The ladder 3 can be stably hooked on the truck 4 via the hooks 3015, 3016, and in particular, can be hooked on the loading platform 41 of the truck 4. Referring to FIG. 6, when the ladder 3 is in an unfolded state and hooked on the loading platform 41 of the truck 4, the frame 30 of the ladder 3 extends downward from the loading platform 41 of the truck 4 almost to bring the bottom close to the ground, and the handrail bars 311, 312 extend upward from the loading platform 41. With this design, the worker can safely climb the ladder 3 to ascend and descend to the bed 41 of the truck 4, and the handrail bars 311, 312 provide firm support, enhancing safety and stability during the climbing process.

[0051] When the ladder 3 is not in use, the worker retracts the handrail bars 311, 312 into the sides 301, 302 of the frame 30 of the ladder 3, and rotates the rungs 321, 322, 323 to store them in the frame 30. This design can effectively reduce the overall volume of the ladder 3, making it easier to store and carry the ladder 3, thereby improving the convenience and flexibility of use.

[0052] Fig. 7A is a schematic three-dimensional view showing a ladder 5 that can be hooked to a truck in an unfolded state in one embodiment of the present disclosure, and Fig. 7B is a schematic three-dimensional view showing a ladder 5 that can be hooked to a truck in a folded state in one embodiment of the present disclosure.

[0053] The ladder 5 includes a frame 50, a handrail bar 511, and steps 521, 522. The frame 50 has a side 501 and a side 502 opposite the side 501. The frame 50 further includes links 523, 524 configured to connect the steps 521 and 522 to each other. The frame 50 further includes ties 525, 526 configured to connect the step 521 to the sides 501, 502 of the frame 50. In some embodiments of the present disclosure, the frame 50 and the steps 521, 522 of the ladder 5 are substantially the same as or similar to the frame 10 and the steps 121, 122 of the ladder 1 disclosed in Figures 1A, 1B, 2A, and 2B, and the connecting structure relationships between the frame 50, the steps 521, 522, the links 523, 524, and the ties 525, 526 are substantially the same as or similar to the connecting structure relationships between the frame 10, the steps 121, 122, the links 123, 124, and the ties 125, 126 of the ladder 1 disclosed in Figures 1A, 1B, 2A, and 2B. Furthermore, a hook 5015 is provided on the side edge 501 of the frame 50 of the ladder 5, and a hook 5016 is provided on the side edge 502. In some embodiments of the present disclosure, the hooks 5015, 5016 of the ladder 5 are substantially identical to or similar to the hooks 1015, 1016 of the ladder 1 disclosed in Figures 1A, 1B, 2A, and 2B. The ladder 5 can be stably hooked onto a truck via the hooks 5015, 5016, providing a safe and convenient way for workers to climb.

[0054] The difference between ladder 5 and ladder 1 is that ladder 5 has only a single handrail bar 511 connected to the side 501 of the frame 50, i.e., no handrail bar is connected to the side 502 of the frame 50 of ladder 5. In some embodiments of the present disclosure, the connecting structure relationship between the handrail bar 511 and the side 501 of the frame 50 is the same as or similar to the connecting structure relationship between the handrail bar 111 and the side 101 of the frame 10. In addition, the handrail bar 511 includes an opening / closing mechanism 513 and a guard member 515. In some embodiments of the present disclosure, the opening / closing mechanism 513 and the guard member 515 of the handrail bar 511 are the same as or similar to the opening / closing mechanism 113 and the guard member 115 of the handrail bar 111.

[0055] Fig. 8A is a schematic three-dimensional view showing a ladder 6 that can be hooked to a truck in an unfolded state in one embodiment of the present disclosure, and Fig. 8B is a schematic three-dimensional view showing a ladder 6 that can be hooked to a truck in a folded state in one embodiment of the present disclosure.

[0056] The ladder 6 includes a frame 60 and rungs 621, 622. The frame 60 has a side 601 and a side 602 opposite the side 601. The frame 60 further includes links 623, 624 configured to connect the rungs 621, 622 to each other. The frame 60 further includes ties 625, 626 configured to connect the rung 621 to the sides 601, 602 of the frame 60. In some embodiments of the present disclosure, the frame 60 and the steps 621, 622 of the ladder 6 are substantially identical or similar to the frame 10 and the steps 121, 122 of the ladder 1 disclosed in Figures 1A, 1B, 2A, and 2B, and the connecting structural relationships between the frame 60, the steps 621, 622, the links 623, 624, and the ties 625, 626 are substantially identical or similar to the connecting structural relationships between the frame 10, the steps 121, 122, the links 123, 124, and the ties 125, 126 of the ladder 1 disclosed in Figures 1A, 1B, 2A, and 2B. Furthermore, a hook 6015 is provided on the side edge 601 of the frame 60 of the ladder 6, and a hook 6016 is provided on the side edge 602. In some embodiments of the present disclosure, the hooks 6015, 6016 of the ladder 6 are substantially identical to or similar to the hooks 1015, 1016 of the ladder 1 disclosed in Figures 1A, 1B, 2A, and 2B. The ladder 6 can be stably hooked onto a truck via the hooks 6015, 6016, providing a safe and convenient way for workers to climb.

[0057] The difference between ladder 6 and ladder 1 is that ladder 6 does not have handrail bars connected to the sides 601, 602 of the frame 60, i.e., no handrail bars are connected to the sides 601, 602 of the frame 60 of ladder 6.

[0058] Several embodiments have been described above to allow those skilled in the art to better understand the aspects of the present disclosure. Those skilled in the art will understand that the present disclosure can be easily used to design or modify other procedures and structures to carry out the same purpose and / or achieve the same advantages as the embodiments introduced herein. Those skilled in the art should also understand that various changes, substitutions and alterations can be made to the present specification without such equivalents departing from the spirit and scope of the present disclosure. [Explanation of symbols]

[0059] 1...ladder, 10...frame, 101...side edge, 1011...end, 1015...hook, 111...handrail bar, 1110...end, 113...opening / closing mechanism, 1131...trigger button, 1132...movable cover, 115...guard member, 102...side edge, 1021...end, 1016...hook, 112...handrail bar, 1120...end, 114...opening / closing mechanism, 1141...trigger button, 1142...movable cover, 121...step, 1211...anti-slip pad, 122 ...step, 1221...anti-slip pad, 123...link, 124...link, 125...connector, 126...connector, 2 truck, 21...cargo platform, 3...ladder, 30...frame, 301...side, 3011...end, 3015...hook, 311...handrail bar, 3110...end, 313...opening / closing mechanism, 3131...trigger button, 3132...movable cover, 315...guard member, 302...side, 3021...end, 3016...hook, 312...handrail bar, 3120...end, 314...opening / closing mechanism, 3141...trigger button, 3142...movable cover, 321...step, 3211...anti-slip pad, 322...step, 3221...anti-slip pad, 323...step, 3231...anti-slip pad, 325...connector, 326...connector, 327...link, 328...link, 4...truck, 41...cargo platform, 5...ladder, 50...frame, 501...side, 5015...hook, 511...handrail bar, 513...opening Closing mechanism, 515...guard member, 502...side edge, 5016...hook, 512...handrail bar, 521...step, 522...step, 523...link, 524...link, 525...connector, 526...connector, 6...ladder, 60...frame, 601...side edge, 6015...hook, 602...side edge, 6016...hook, 612...handrail bar, 621...step, 622...step, 623...link, 624...link, 625...connector, 626...connector.

Claims

1. A frame having two opposing sides; a plurality of treads each pivotally connected to the two sides of the frame; A ladder that can be hooked onto a truck equipped with A ladder that can be hooked onto a truck, the ladder having a hook on each of the two sides of the frame configured to hook the ladder onto the truck.

2. 2. The ladder of claim 1, wherein the hooks are proximate to the ends of the sides of the frame.

3. 2. The ladder of claim 1, further comprising at least one handrail bar connected to one of the two sides of the frame and configured to slide relative to the side of the frame, the handrail bar being extendable from an end of the side of the frame and retractable from the end of the side of the frame into the side of the frame.

4. 4. The ladder of claim 3, wherein the handrail bar comprises an iron pipe.

5. 4. The ladder of claim 3, wherein the handrail bar has an opening and closing mechanism configured to slide the handrail bar relative to the side of the frame.

6. 6. The ladder of claim 5, wherein the opening and closing mechanism comprises a trigger button configured to control the opening and closing mechanism, the trigger button being disposed substantially at an end of the handrail bar remote from the frame.

7. 7. The ladder of claim 6, wherein the handrail bar includes a guard member generally adjacent the trigger button, the guard member generally abutting the end of the side of the frame when the handrail bar is retracted into the side of the frame.

8. The ladder of claim 6, wherein the opening and closing mechanism includes a cover configured to movably cover the trigger button.

9. 2. The ladder of claim 1, wherein the plurality of rungs are connectable to one another via links and are capable of rotating simultaneously via the links.

10. 10. The ladder of claim 9, further comprising a tether connected to one of the plurality of rungs closest to the side of the frame and the end of the side of the frame and configured to rotate the rung a predetermined angle.

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