Ladder with step belt support

Abstract

The utility model relates to a ladder with steps provided with supports. The ladder comprises two supporting columns, a plurality of steps and a plurality of supporting pieces. The two ends of the bearing rod are inserted into the corresponding supporting column holes, the bearing rod can be fixed to the supporting columns at the two ends through the spin riveting technology, the connecting rigidity between the step and the supporting columns is ensured, stability is enhanced, and the labor cost and the material cost of the rivet connecting technology are saved. Supporting pieces are arranged at the two ends of the steps and can be tightly connected with bearing rods of the steps through supporting holes, profiling grooves formed in one sides of the supporting pieces facilitate embedding of the ends of the folded edges, and the other sides of the supporting pieces abut against the surfaces of the supporting columns. In this way, the supporting pieces play a certain role in isolating the steps from the surfaces of the supporting columns, and particularly the inner surfaces of the supporting columns can be prevented from being abraded by the steps in the spin riveting fixing process; moreover, after the folded edges are embedded into the supporting pieces, the supporting pieces can also support the folded edges to a certain extent, so that the stability of the whole ladder is improved.

Description

Technical Field

[0001] The present application relates to the technical field of climbing equipment, and in particular to a ladder supported by tread belts. Background Art

[0002] Most current fiberglass reinforced plastic (FRP) ladders have their treads fixed to the pillars with rivets, though some also use screw rivets to secure the treads to the pillars. This method of securing the treads to the pillars with rivets incurs rivet costs, and as the number of treads increases, so does labor costs. While this method of directly riveting the treads to the pillars with a screw riveter saves on rivet and labor costs, direct riveting the treads to the pillars places high demands on the structural design and installation precision of the connection between the treads and the FRP pillars. Improper design or inadequate installation precision often reduces the stability of the entire ladder. Utility Model Content

[0003] In view of this, an embodiment of the present application provides a tread-supported ladder to solve at least one problem existing in the background technology.

[0004] The present invention provides a ladder comprising:

[0005] At least two pillars, each pillar having a plurality of pillar holes arranged along the height direction of the pillar;

[0006] a plurality of steps connected between two of the pillars; the steps comprising a plurality of load-bearing rods and folded edges, the load-bearing rods and the folded edges both extending in a first direction, the folded edges being fixed to one or both sides of the load-bearing rods in a second direction; the second direction being perpendicular to the first direction; two ends of the load-bearing rods protruding from two ends of the folded edges in the first direction; and two ends of the load-bearing rods being inserted into corresponding holes in the pillars;

[0007] A plurality of support members, each having a support hole extending through the first direction, wherein the support members are sleeved on both ends of the load-bearing rod along the first direction through the support hole; the first side of the support member along the first direction abuts against the pillar surface, and the second side of the support member along the first direction has a contour groove matching the folded edge, the second side being the opposite side of the first side; the end of the folded edge is embedded in the corresponding contour groove.

[0008] In an optional embodiment, the step includes more than two load-bearing rods, the two or more load-bearing rods of a single step are arranged along the second direction, and the top surfaces of the two or more load-bearing rods of a single step are in the same plane.

[0009] In an optional embodiment, the top surfaces of all the folded edges of a single step and the top surface of the load-bearing rod are in the same plane.

[0010] In an optional embodiment, the folding edge includes a middle folding edge and an edge folding edge, the middle folding edge is arranged between two adjacent load-bearing rods, and the two sides of the middle folding edge along the second direction are fixed to the load-bearing rods; the edge folding edge is fixed to the load-bearing rods at the two side edges of the step along the second direction; the edge of the edge folding edge located on the outer side of the step extends in a direction parallel to the support.

[0011] In an optional embodiment, the support comprises:

[0012] a main body plate, a surface of which abuts against the first side of the support member;

[0013] Two side panels, the two side panels are located on both sides of the main plate along the second direction, the support member is located between the two side panels of the step, and the two ends of the support member along the second direction are respectively in contact with the two side panels of the step.

[0014] In an optional embodiment, the portions of both ends of the load-bearing rod that pass through the pillar hole and are exposed on the outer surface of the pillar can abut the surface of the pillar located around the pillar hole to fix the load-bearing rod to the pillar.

[0015] In an optional embodiment, the top surface of the folded edge and the top surface of the load-bearing rod both have anti-slip textures.

[0016] In an optional embodiment, the folded edge is arched along the second direction.

[0017] In an optional embodiment, the load-bearing rod is a hollow rod body, and the cross-sectional shape of the load-bearing rod is polygonal, circular or elliptical.

[0018] In an optional embodiment, the support member is made of plastic or metal and has a lower hardness than the material of the pillar and the material of the step.

[0019] The ladder provided in the embodiment of the present application has a load-bearing rod with both ends inserted into corresponding support holes. The rods can be fixed to the support posts at both ends using a riveting process, ensuring the rigidity of the connection between the tread and the support posts, enhancing stability, and eliminating the labor and material costs of the rivet connection process. Support members are provided at both ends of the tread, which can be tightly connected to the load-bearing rod of the tread through the support holes. A contoured groove on one side of the support member facilitates the insertion of the end of the folded edge, while the other side abuts the surface of the support post. In this way, the support member provides a certain degree of isolation between the tread and the support post surface, particularly preventing the tread from wearing the inner surface of the support post during the riveting process. Furthermore, after the folded edge is inserted into the support member, the support member can also provide a certain degree of support for the folded edge, thereby improving the stability of the entire ladder.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 An exploded view of the ladder structure provided in an embodiment of the present application;

[0023] Figure 2 A schematic diagram of a step structure provided in an embodiment of the present application;

[0024] Figure 3 A schematic diagram of the support structure provided in an embodiment of the present application;

[0025] Figure 4 A schematic diagram of the connection structure between the support member and the step provided in an embodiment of the present application;

[0026] Figure 5 Schematic diagram of the connection structure between the pillars and steps provided in an embodiment of the present application.

[0027] The reference numerals in the figures are:

[0028] 1. Stepping;

[0029] 2. Pillar; 21. Pillar hole; 22. Main plate; 23. Side plate;

[0030] 3. Support member; 31. Support hole; 13. First support end; 14. Second support end; 15. Profile groove;

[0031] 6. Load-bearing rod;

[0032] 9. Folding; 91. Middle folding; 92. Edge folding. DETAILED DESCRIPTION

[0033] To make the technical solutions and beneficial effects of the present invention more clearly understood, the following detailed description is given by way of specific embodiments. The accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly illustrate 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 belongs.

[0034] In the description of the present invention, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of simplifying the description of the present invention, and do not indicate that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and should not be understood as a limitation to the present invention.

[0035] In this utility model, the terms "first" and "second" are used solely for descriptive purposes and should not be construed as indicating the relative importance of the features indicated or the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two or three, and "several" means at least one, such as one, two, or three, unless otherwise expressly specified.

[0036] In this utility model, unless otherwise expressly defined, the terms "install," "connect," "connect," "fix," "dispose," etc. should be understood broadly. For example, "connect" can mean fixed, removable, or integrated; it can mean mechanical or electrical; it can mean direct or indirect connection through an intermediary; it can also mean internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0037] In the present invention, unless otherwise clearly defined, when a first feature is “on,” “above,” “above,” “above,” “below,” “below,” or “below” a second feature, the first feature and the second feature may be in direct contact, or the first feature and the second feature may be in indirect contact via an intermediate medium. Moreover, when a first feature is “on,” “above,” or “above” a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than the horizontal height of the second feature. When a first feature is “below,” “below,” or “below” a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0038] In order to fully understand the present application, detailed steps and detailed structures will be presented in the following description to illustrate the technical solution of the present application. The preferred embodiments of the present application are described in detail below. However, in addition to these detailed descriptions, the present application may also have other implementation methods.

[0039] This embodiment provides a ladder, such as Figure 1 As shown, it includes: two pillars 2, a plurality of steps 1 and a plurality of supporting members 3.

[0040] The pillars 2 have a plurality of pillar holes 21 arranged along the height direction of the pillars 2, and the steps 1 are connected between two pillars 2. Figure 2 、 Figure 4 As shown, the step 1 includes a plurality of load-bearing rods 6 and folded edges 9. The load-bearing rods 6 and folded edges 9 extend along a first direction. The folded edges 9 are fixed to one or both sides of the load-bearing rods 6 along a second direction. The second direction is perpendicular to the first direction. The two ends of the load-bearing rods 6 protrude from the two ends of the folded edges 9 along the first direction. Figure 5 As shown, both ends of the load-bearing rod 6 are inserted into the corresponding support holes 21 .

[0041] like Figure 3 、 Figure 4 As shown, the support member 3 has a support hole 31 that passes through along the first direction, and the support member 3 is mounted on both ends of the load-bearing rod 6 along the first direction through the support hole 31; the support member 3 abuts against the surface of the pillar 2 on the first side along the first direction, and the support member 3 has a contour groove 15 that matches the folded edge 9 on the second side along the first direction, and the second side is the opposite side of the first side; the end of the folded edge 9 is embedded in the corresponding contour groove 15.

[0042] The ladder provided in this embodiment has two ends of its load-bearing rod 6 inserted into corresponding support holes 21 and can be fixed to the support 2 at both ends using a riveting process, ensuring the rigidity of the connection between the step 1 and the support 2, enhancing stability, and eliminating the labor and material costs of the rivet connection process. Support members 3 are provided at both ends of the step 1. These support members 3 can be tightly connected to the load-bearing rod 6 of the step 1 through support holes 31. A contoured groove 15 on one side of the support member 3 facilitates the insertion of the end of the folded edge 9, while the other side abuts the surface of the support 2. In this way, the support member 3 provides a certain degree of isolation between the step 1 and the surface of the support 2, particularly preventing the step 1 from wearing the inner surface of the support 2 during the riveting process. Furthermore, after the folded edge 9 is inserted into the support member 3, the support member 3 can also provide a certain degree of support for the folded edge 9, thereby improving the stability of the entire ladder.

[0043] In addition, the folded edge 9 extends along the second direction, expanding the width of the step 1. While the load-bearing rod 6 provides support for the user's feet, the folded edge 9 can also provide certain support to the user's feet, helping the user to maintain balance when climbing.

[0044] At least two pillars 2 are provided, and when necessary, more can be provided, for example, three, four or more pillars.

[0045] In an optional embodiment, if Figure 2 、 Figure 4 As shown, the step 1 includes two or more load-bearing rods 6. The two or more load-bearing rods 6 of a single step 1 are arranged along the second direction, and the top surfaces of the two or more load-bearing rods 6 of a single step 1 are all in the same plane. In this embodiment, the purpose of providing multiple load-bearing rods 6 is to expand the contact area with the sole of the user's foot. The top surfaces of multiple load-bearing rods 6 are combined to form a larger contact surface. Therefore, when the user steps on the top of the step 1, the support force on the foot is more balanced, and the contact area is large, which is conducive to the user maintaining balance when climbing the ladder. It can be understood that when the ladder provided in this embodiment is in use, the top surface of its load-bearing rod 6 should be horizontal or nearly horizontal. The number of support holes 21 on the support 2 should be equal to or greater than the number of load-bearing rods 6 to provide space for installing multiple load-bearing rods 6. In this embodiment, if the top of the load-bearing rod 6 is a curved structure, its top surface should be the horizontal plane where its highest point is located.

[0046] In an optional embodiment, if Figure 2 、 Figure 4 As shown, the top surfaces of all the folded edges 9 of a single step 1 are coplanar with the top surface of the load-bearing rod 6. In this embodiment, the top surfaces of the folded edges 9 and the top surface of the load-bearing rod 6 jointly support the user's foot, expanding the support area for the user's foot. In this embodiment, if the top of the load-bearing rod 6 or the folded edge 9 is an arc-shaped structure, its top surface should be the horizontal plane at its highest point.

[0047] In an optional embodiment, if Figure 2 As shown, the folding edge 9 includes a middle folding edge 91 and an edge folding edge 92. The middle folding edge 91 is provided between two adjacent load-bearing rods 6, and the middle folding edge 91 is fixed to the load-bearing rods 6 on both sides along the second direction; the edge folding edges 92 are fixed to the load-bearing rods 6 at the edges of the two sides of the step 1 along the second direction; the edge of the edge folding edge 92 is located on the outer side of the step 1 and extends in a direction parallel to the pillar 2. In this embodiment, by designing two types of folding edges 9 - the middle folding edge 91 and the edge folding edge 92, the middle folding edge 91 can facilitate the connection between two adjacent load-bearing rods 6, the edge folding edge 92 is provided on the side of the outermost load-bearing rod 6, and the edge of the edge folding edge 92 is located on the outer side of the step 1 and extends in a direction parallel to the pillar 2, that is, this structure makes the outer edge of the step 1 flat, avoids the generation of protruding and sharp structures on the outer edge of the step 1, and increases the safety of use.

[0048] In an optional embodiment, if Figure 1 As shown, the pillar 2 includes: a main plate 22 and two side plates 23. The surface of the main plate 22 abuts against the first side of the support member 3; the two side plates 23 are located on both sides of the main plate 22 along the second direction, and the support member 3 is located between the two side plates 23 of the step 1, and the two ends of the support member 3 along the second direction respectively abut against the two side plates 23 of the step 1. In this embodiment, the pillar 2 is a profile with a C-shaped cross section, that is, there is a certain installation space between the two side plates 23. Among them, as Figure 3 As shown, the two ends of the support member 3 along the second direction are respectively a first support end 13 and a second support end 14, which can enhance stability by abutting the two side panels 23 of the step 1. It is understandable that in order to better fit with the side panels 23, the first support end 13 and the second support end 14 can both be designed to be flat.

[0049] In an optional embodiment, if Figure 5 As shown, both ends of the load-bearing rod 6 pass through the support hole 21 and are exposed on the outer surface of the support 2. This part can be formed into a flange by the riveting process ( Figure 5The two ends of the load-bearing rod 6 shown are in the state before the process starts), and the flange can abut the surface of the pillar 2 around the pillar hole 21 to fix the load-bearing rod 6 to the pillar 2. In this embodiment, the length of the load-bearing rod 6 is designed to be greater than the distance between the two pillars 2, so that the two ends of the load-bearing rod 6 pass through the pillar hole 21 and are exposed on the outer surface of the pillar 2, and in subsequent processing, the load-bearing rod 6 can be fixed to the pillar 2 by a rotary riveting process. The process is simple, the fixation is firm, and the use of a riveting process is avoided. Among them, in order to facilitate the flanging forming, the end of the load-bearing rod 6 can protrude 5mm to 6mm relative to the outer surface of the pillar 2. It can be understood that the parts of the two ends of the load-bearing rod 6 that pass through the pillar hole 21 and are exposed on the outer surface of the pillar 2 in other embodiments may not be made into flanges. For example, by adding fixing parts, the two ends of the load-bearing rod 6 can also abut the surface of the pillar 2 around the pillar hole 21 to fix the load-bearing rod 6 to the pillar 2.

[0050] In an optional embodiment, if Figure 4 As shown, the top surface of the folded edge 9 and the top surface of the load-bearing rod 6 both have anti-slip textures, which can increase the friction coefficient of the surface, play an anti-slip effect, and improve safety during use.

[0051] In an optional embodiment, if Figure 2 、 Figure 4 As shown, the folded edge 9 is arched along the second direction. This structure can improve the bending resistance of the folded edge 9 and increase the overall load-bearing capacity of the tread 1.

[0052] In an optional embodiment, if Figure 2 、 Figure 4 As shown, the load-bearing rod 6 is a hollow rod body, and the cross-sectional shape of the load-bearing rod 6 is polygonal, circular or elliptical. In this embodiment, the load-bearing rod 6 is designed as a hollow structure, which can greatly reduce weight, save material costs and facilitate processing. Among them, the cross-sectional shape of the load-bearing rod 6 can be a polygon with strong stability, or a circle or ellipse that is simpler to process. It is preferably a parallelogram. When the cross-sectional shape of the load-bearing rod 6 adopts a parallelogram shape, there is less shaking between the inner wall of the support hole 21 and it is not easy to wear. Two sides of the parallelogram serve as the top and bottom surfaces, wherein the top surface is horizontal when in use, which is convenient for the user to step on; the other two sides serve as side surfaces, extending in a direction parallel to the support 2, and can withstand greater bending moments and improve the bearing capacity. It can be understood that the shape of the support hole 21 should match the shape of the selected load-bearing rod 6 during design.

[0053] In an optional embodiment, the material of the pillar 2 is fiberglass, the material of the step 1 is metal, and the material of the support member 3 is plastic or metal with a lower hardness than the material of the pillar 2 and the material of the step 1. In this embodiment, the hardness of the material of the support member 3 can better protect the pillar 2 and the step 1, and prevent both from wear during use or processing.

[0054] It is understood that when the support 2 is made of materials other than fiberglass, or the step 1 is made of materials other than metal, the provision of the support member 3 can also, to a certain extent, prevent wear and tear of the two during use or processing. Therefore, the ladder provided in this embodiment is not limited to application in fiberglass ladders.

[0055] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations of the claims. Various modifications and variations may be made to the above embodiments without departing from the scope of the present disclosure. Similarly, the various technical features of the above embodiments may be arbitrarily combined to form additional embodiments of the present application that may not be explicitly described. Therefore, the above embodiments merely illustrate several implementations of the present application and do not limit the scope of protection of the patent application.

Claims

1. A ladder supported by treads, characterized in that: include: At least two pillars (2), each pillar (2) having a plurality of pillar holes (21) arranged along the height direction of the pillar (2); A plurality of steps (1), wherein the steps (1) are connected between two of the pillars (2); the steps (1) include a plurality of load-bearing rods (6) and folded edges (9); the load-bearing rods (6) and the folded edges (9) both extend along a first direction; the folded edges (9) are fixed to one side or both sides of the load-bearing rods (6) along a second direction; the second direction is perpendicular to the first direction; the two ends of the load-bearing rods (6) protrude from the two ends of the folded edges (9) along the first direction; the two ends of the load-bearing rods (6) are inserted into the corresponding pillar holes (21); A plurality of support members (3) are provided, wherein the support members (3) have support holes (31) extending through the first direction, and the support members (3) are sleeved on both ends of the load-bearing rod (6) along the first direction through the support holes (31); the support members (3) abut against the surface of the pillar (2) on a first side along the first direction, and the support members (3) have a contour groove (15) matching the folding edge (9) on a second side along the first direction, the second side being the opposite side of the first side; and the end of the folding edge (9) is embedded in the corresponding contour groove (15).

2. The ladder according to claim 1, characterized in that The step (1) includes more than two load-bearing rods (6), the two or more load-bearing rods (6) of a single step (1) are arranged along the second direction, and the top surfaces of the two or more load-bearing rods (6) of a single step (1) are all in the same plane.

3. The ladder according to claim 2, characterized in that The top surfaces of all the folded edges (9) of a single step (1) and the top surface of the load-bearing rod (6) are in the same plane.

4. The ladder according to claim 2, characterized in that The folding edge (9) includes a middle folding edge (91) and an edge folding edge (92), wherein the middle folding edge (91) is arranged between two adjacent load-bearing rods (6), and the two sides of the middle folding edge (91) along the second direction are fixed to the load-bearing rods (6); the edge folding edges (92) are fixed to the load-bearing rods (6) at the two side edges of the step (1) along the second direction; the edge of the edge folding edge (92) located on the outer side of the step (1) extends in a direction parallel to the support (2).

5. The ladder according to any one of claims 1 to 4, characterized in that: The support (2) comprises: a main body plate (22), wherein a surface of the main body plate (22) abuts against the first side of the support member (3); Two side panels (23), the two side panels (23) are located on both sides of the main plate (22) along the second direction, the support member (3) is located between the two side panels (23) of the step (1), and the two ends of the support member (3) along the second direction are respectively in contact with the two side panels (23) of the step (1).

6. The ladder according to any one of claims 1 to 4, characterized in that: The portions of the two ends of the load-bearing rod (6) that pass through the pillar hole (21) and are exposed on the outer surface of the pillar (2) can abut against the surface of the pillar (2) located around the pillar hole (21) to fix the load-bearing rod (6) to the pillar (2).

7. The ladder according to any one of claims 1 to 4, characterized in that: The top surface of the folded edge (9) and the top surface of the load-bearing rod (6) both have anti-slip textures.

8. The ladder according to any one of claims 1 to 4, characterized in that: The folded edge (9) is arched along the second direction.

9. The ladder according to any one of claims 1 to 4, characterized in that: The load-bearing rod (6) is a hollow rod body, and the cross-sectional shape of the load-bearing rod (6) is polygonal, circular or elliptical.

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