Ladder

Abstract

The utility model relates to a ladder. The ladder comprises a main body, a plurality of steps and connecting pieces, after the side walls of the steps are attached to the surface of the main body, connecting pieces can partially penetrate through the assembling holes to be connected with the connecting holes, and the steps and the main body are fixed. According to the fixing mode, a flange edge used for installing the connecting piece does not need to be additionally arranged, the two ends of the step do not need to be flattened, the connecting piece is installed in the internal space of the step and fixed to the body through the internal space, fixing of the step and the body is achieved, and the structure is simple. Compared with the scheme that flange edges are additionally arranged on the steps, the ladder provided by the utility model has the advantages that materials are saved, the economical efficiency is improved, and the cost is greatly reduced. Compared with the scheme of flattening steps, the ladder provided by the utility model has the advantages that the processing procedure is shortened, the cracking phenomenon in the flattening step process is also avoided, and the yield is improved, so that the cost is also reduced, and the product competitiveness is improved.

Description

Technical Field

[0001] This application relates to the field of work equipment technology, and in particular to a ladder. Background Technology

[0002] Currently, most ladder steps and supports are fixed together by welding, riveting, or crimping. Multi-functional ladders and workbenches commonly used in the industry typically employ riveting. To ensure the steps and supports are riveted together, thinner sections relative to the main body need to be formed or fixed at both ends of the steps. Existing technology generally employs two solutions:

[0003] 1. Adding a flange to the bottom of the enclosed step and punching out the middle part, leaving only the connection parts at both ends with the support, obviously results in a lot of material waste and poor economic efficiency.

[0004] 2. Flatten both ends of the step, and then improve the mechanical properties of the step such as hardness and strength through subsequent processing. In this process, the flattened deformation area of ​​the step is usually out of control, affecting the appearance and shortening the effective tread surface. At the same time, cracking occurs during the flattening process, affecting the yield.

[0005] It is clear that all of the above commonly used solutions have drawbacks. Utility Model Content

[0006] In view of this, the present application provides a ladder to address the deficiencies of the stepping schemes in the prior art.

[0007] This application provides a ladder, including:

[0008] The main body has a plurality of sets of connecting holes arranged along its height direction;

[0009] A plurality of steps are connected to the main body and arranged along the height direction of the main body at a corresponding set of connecting holes; the steps are hollow inside and have openings at both ends; at least part of the sidewall of the step facing the main body is flat; the sidewall is in contact with the surface of the main body; and the sidewall is provided with mounting holes corresponding to the connecting holes.

[0010] A connector, a portion of which is located inside the step and another portion passes through the mounting hole and connects to the connection hole, thereby fixing the step to the body.

[0011] In an optional embodiment, the ladder further includes a protective cover installed at the openings at both ends of the step to close the openings.

[0012] In an alternative embodiment, the protective cover includes an embedded portion and an exposed portion, the embedded portion being embedded within the opening, and one side of the exposed portion abutting against the end of the step.

[0013] In an alternative embodiment, one side of the embedded portion has a notch for avoiding the connector.

[0014] In an alternative embodiment, the connector is a rivet, screw, or bolt.

[0015] In an optional embodiment, two or more mounting holes are provided at each end of the step, and the number and position of a set of connecting holes on the main body correspond to the number and position of the mounting holes of the step.

[0016] In an alternative embodiment, the steps are prism-shaped tubing.

[0017] In an optional embodiment, the main body includes a first pillar and a second pillar, which are respectively connected to both ends of the step, and both the first pillar and the second pillar are hollow inside.

[0018] In an optional embodiment, the ladder further includes two diagonal braces located on both sides of the bottom of the main body along the height direction. One diagonal brace has the first support column and the step fixed at both ends, and the other diagonal brace has the second support column and the step fixed at both ends.

[0019] In an optional embodiment, the ladder further includes two foot pads, which are respectively fitted onto the bottom ends of the first support and the second support along the height direction of the main body.

[0020] The ladder provided in this application embodiment allows the steps to be fixed to the main body after their side walls are fitted against the main body surface. The connecting parts pass through the assembly holes and connection holes to connect the steps and fix them to the main body. This fixing method eliminates the need for additional flanges for the connecting parts and for flattening the ends of the steps. The connecting parts are installed inside the steps and fixed to the main body using this internal space, achieving a simple structure. Compared to adding flanges to the steps, the ladder provided in this application embodiment saves materials, improves economy, and significantly reduces costs. Compared to flattening the steps, the ladder provided in this application embodiment shortens the processing steps and avoids cracking that occurs during the flattening process, increasing the yield rate, thereby reducing costs and enhancing product competitiveness.

[0021] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of the ladder provided in the embodiments of this application;

[0024] Figure 2 This is a schematic diagram of the step structure provided in an embodiment of this application;

[0025] Figure 3 A schematic diagram of the process steps for adding a flange edge in the existing technology;

[0026] Figure 4 This is a schematic diagram of the structure of a step with flattened ends in the prior art.

[0027] 1. Main body; 11. Connecting hole; 12. First support column; 13. Second support column;

[0028] 2. Step; 21. Opening; 22. Side wall; 23. Assembly hole; 24. Flange edge; 25. Flattened area;

[0029] 3. Connectors;

[0030] 4. Protective cover; 41. Embedded part; 42. Exposed part

[0031] 5. Diagonal bracing;

[0032] 6. Foot pads. Detailed Implementation

[0033] To make the technical solution and beneficial effects of this utility model more apparent and understandable, a detailed description is provided below by listing specific embodiments. The accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.

[0034] In the description of this utility model, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In other words, they should not be construed as limitations on this utility model.

[0035] In this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating the relative importance of the indicated features or the number of indicated technical features. Therefore, a feature specified as "first" or "second" can explicitly indicate that at least one of those features is included. In the description of this utility model, "multiple" means at least two, such as two, three, etc.; "several" means at least one, such as one, two, three, etc., unless otherwise explicitly specified.

[0036] In this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "linking," "fixing," and "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; 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 also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] In this utility model, unless otherwise explicitly defined, the terms "above," "on top of," "above," "over," "below," "below," "below," or "below" for "first feature above second feature" can refer to direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Furthermore, "above," "above," and "over" for "first feature above second feature" can mean the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. Similarly, "below," "below," and "below" for "first feature below second feature" can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0038] To fully understand this application, detailed steps and structures will be presented in the following description to illustrate the technical solution of this application. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other implementation methods.

[0039] like Figure 3 As shown, in the prior art, there is a type of step 2 with an added flange. When the step 2 is in the blank stage, its flange 24 extends from one end to the other along the length of the step 2. That is, part of the flange 24 is within the area where the user steps and needs to be removed. After removing the middle part of the flange 24, the finished product is obtained. It can be seen that the step 2 manufactured by this method requires the waste of some material, and the material utilization rate is not high.

[0040] like Figure 4 As shown, there is another type of step 2 in the prior art that is flattened at both ends. This type of step 2 forms a flattened area 25 at both ends. Flattening the step 2 requires additional processes, and there is a chance of cracking during the flattening process, resulting in a low yield. Moreover, the thickness of the flattened area 25 is gradually changing, which causes the length of the thickest part in the middle of the step 2 to be insufficient, resulting in insufficient actual effective stepping length of the step 2.

[0041] This embodiment provides a ladder, such as Figure 1 , Figure 2 As shown, it includes: main body 1, several steps 2 and connecting parts 3.

[0042] The main body 1 has several sets of connecting holes 11 arranged along its height direction. Several steps 2 are connected to the main body 1 and are arranged along the height direction of the main body 1 at corresponding sets of connecting holes 11. The step 2 is hollow inside and has openings 21 at both ends. The side wall 22 of the step 2 facing the main body 1 is at least partially flat and fits against the surface of the main body 1. The side wall 22 has mounting holes 23 corresponding to the connecting holes 11. A part of the connector 3 is located inside the step 2, and the other part passes through the mounting hole 23 and connects to the connecting hole 11, fixing the step 2 to the main body 1.

[0043] This embodiment provides a ladder. The height direction refers to the direction in which the height difference between the ladder and the ground increases during normal use. Several steps 2 are arranged along the height direction of the main body 1, that is, the height difference between the steps 2 and the ground gradually increases as they are arranged, allowing users to climb. A set of connecting holes 11 is opened at regular intervals along the height direction of the main body 1. The distance between two adjacent sets of connecting holes 11 can be set as needed, and the specific distance is not limited in this embodiment. The function of the connecting holes 11 is to connect the corresponding steps 2. After the side wall 22 of the step 2 is fitted against the surface of the main body 1, the mounting hole 23 is aligned with the connecting hole 11, and then a connector 3 passes through the mounting hole 23 to connect the connecting hole 11. After the connector 3 is locked, the step 2 is fixed to the main body 1.

[0044] The ladder provided in this embodiment, after the step 2 is attached to the surface of the main body 1 through its side wall 22, can be connected to the connecting hole 11 through the assembly hole 23 via the connector 3, thus fixing the step 2 to the main body 1. This fixing method does not require the addition of a flange edge 24 for installing the connector 3, nor does it require flattening the two ends of the step 2. The connector 3 is installed in the internal space of the step 2 and fixed to the main body 1 using this internal space, thus achieving the fixation of the step 2 to the main body 1, resulting in a simple structure. Compared with the solution of adding a flange edge 24 to the step 2, the ladder provided in this embodiment saves materials, improves economy, and greatly reduces costs. Compared with the solution of flattening the step 2, the ladder provided in this embodiment shortens the processing steps and also avoids cracking that occurs during the flattening process, improving the yield rate, thereby reducing costs and improving product competitiveness.

[0045] In an alternative embodiment, such as Figure 1 As shown, the ladder in this embodiment also includes a protective cover 4, which is installed at the openings 21 at both ends of the step 2 to close the openings 21. In this embodiment, the protective cover 4 can cover both ends of the step 2, preventing sharp edges of the step 2 from being exposed and protecting the user. The protective cover 4 also covers the connector 3, providing some protection for the connector 3. In addition, the protective cover 4 also has a certain decorative function.

[0046] In an alternative embodiment, such as Figure 1 , Figure 2 As shown, the protective cover 4 includes an embedded portion 41 and an exposed portion 42. The embedded portion 41 is embedded in the opening 21, and one side of the exposed portion 42 abuts against the end of the step 2. In this embodiment, it is divided into two sections. The first section, the embedded portion 41, is embedded in the opening 21 to connect with the inner wall of the step 2 through friction. The second section, the exposed portion 42, is used to cover the sharp part at the end of the step 2, and at the same time, it facilitates the easy replacement of the protective cover 4.

[0047] In an optional embodiment, the embedded portion 41 of the protective cover 4 has a notch on one side to avoid the connector 3. In this embodiment, the notch design avoids the connector 3, allowing the embedded portion 41 to be embedded into the step 2 a sufficiently long distance to prevent it from easily detaching.

[0048] In an optional embodiment, the connector 3 is a rivet, screw, or bolt. When the connector 3 is a screw or bolt, after inserting the screw or bolt into the step 2, a wrench or other tool is inserted through the opening 21 to mate the screw or bolt, and then the screw or bolt is gradually tightened. When the connector 3 is a rivet, after inserting the rivet into the step 2, a riveting device is used to insert a force-applying component into the step 2. At the same time, a matching force-applying component is provided on one side of the main body 1. After the riveting device is driven, the rivet completes the fixation of the step 2 and the main body 1.

[0049] In an alternative embodiment, such as Figure 1 , Figure 2 As shown, each end of the step 2 has two or more mounting holes 23, and the number and position of a set of connecting holes 11 on the main body 1 correspond to the number and position of the mounting holes 23 on the step 2. In this embodiment, providing multiple mounting holes 23 at the ends of the step 2 and corresponding positions on the main body 1 facilitates the installation of multiple connectors 3 and improves the stability of the step 2 after it is fixed.

[0050] In an alternative embodiment, such as Figure 2 As shown, step 2 is a prism-shaped pipe. The process of manufacturing step 2 using pipe is simple and mature, which helps reduce costs. Preferably, in this embodiment, the cross-sectional shape of the pipe is trapezoidal; in other embodiments, pipes with rectangular, rhomboid, or irregular polygonal cross-sections can also be used.

[0051] In an alternative embodiment, such as Figure 1 As shown, the main body 1 includes a first support column 12 and a second support column 13, which are respectively connected to both ends of the step 2. Both the first support column 12 and the second support column 13 are hollow inside. In this embodiment, the main body 1 is composed of two supports, which is simple in structure. The hollow interior of the first support column 12 and the second support column 13 can reduce the weight of the ladder. Preferably, the cross-sectional shape of the first support column 12 and the second support column 13 is "C" shaped or "I" shaped.

[0052] In an alternative embodiment, such as Figure 1 As shown, the ladder also includes two diagonal braces 5, located on both sides of the bottom of the main body 1 along the height direction. One diagonal brace 5 has its ends fixed to the first support column 12 and the step 2, respectively, while the other diagonal brace 5 has its ends fixed to the second support column 13 and the step 2, respectively. In this embodiment, the diagonal braces 5 can improve the load-bearing capacity of the step 2. Preferably, the diagonal braces 5 are positioned below the step 2 at the lowest point along the height direction of the main body 1. This position does not obstruct user access, and the step 2 is stepped on the most frequently, thus the diagonal braces 5 effectively improve the support force.

[0053] In an alternative embodiment, such as Figure 1 As shown, the ladder also includes two foot pads 6, which are respectively fitted onto the bottom ends of the first support column 12 and the second support column 13 along the height direction of the main body 1. These foot pads 6 can increase the coefficient of friction at the bottom ends of the first support column 12 and the second support column 13, thereby improving the stability of the ladder during use. Preferably, the bottom of the foot pads 6 has an anti-slip texture.

[0054] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of this application that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of this application and do not limit the scope of protection of this patent application.

Claims

1. A ladder, characterized in that, include: The main body (1) has a plurality of sets of connecting holes (11) arranged along its height direction. A plurality of steps (2) are connected to the main body (1) and arranged along the height direction of the main body (1) at a corresponding set of connecting holes (11); the step (2) is hollow inside and has openings (21) at both ends; the side wall (22) of the step (2) facing the main body (1) is at least partially flat; the side wall (22) is in contact with the surface of the main body (1); and the side wall (22) is provided with mounting holes (23) corresponding to the connecting holes (11). The connector (3) is a screw or bolt. After the screw or bolt is placed into the step (2), a tool is used to insert the screw or bolt from the opening (21) so that a part of the screw or bolt is located inside the step (2) and the other part passes through the assembly hole (23) and connects to the connection hole (11) to fix the step (2) to the body (1). The ladder also includes a protective cover (4). The protective cover (4) is installed at the openings (21) at both ends of the step (2) to close the openings (21). The protective cover (4) includes an embedded part (41) and an exposed part (42). The embedded part (41) is embedded in the opening (21), and one side of the exposed part (42) abuts against the end of the step (2).

2. The ladder according to claim 1, characterized in that, The embedded part (41) has a notch on one side for avoiding the connector (3).

3. The ladder according to claim 1 or 2, characterized in that, The two ends of the step (2) are respectively provided with two or more mounting holes (23), and the number and position of a set of connecting holes (11) on the main body (1) correspond to the number and position of the mounting holes (23) of the step (2).

4. The ladder according to claim 1 or 2, characterized in that, The step (2) is a prism-shaped tube.

5. The ladder according to claim 1 or 2, characterized in that, The main body (1) includes a first pillar (12) and a second pillar (13), which are respectively connected to the two ends of the step (2). The first pillar (12) and the second pillar (13) are hollow inside.

6. The ladder according to claim 5, characterized in that, The ladder also includes two diagonal braces (5), which are located on both sides of the bottom of the main body (1) along the height direction. One of the diagonal braces (5) is fixed to the first support column (12) and the step (2) at both ends, and the other diagonal brace (5) is fixed to the second support column (13) and the step (2) at both ends.

7. The ladder according to claim 5, characterized in that, The ladder also includes two foot pads (6), which are respectively fitted onto the bottom ends of the first support column (12) and the second support column (13) along the height direction of the main body (1).

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