A domestic ladder

Abstract

The utility model relates to a kind of domestic herringbone ladder.The rear frame assembly includes rear support and the transverse plate installed on rear support, the top of the transverse plate in the middle is provided with a notch, and the transverse plate in the middle is provided with a round rod, the protrusion inside of end cover side is provided with a clamping hole, and the end of the round rod is clamped in the clamping hole;One end of the pull rod is located in the notch of the transverse plate in the middle, and the pull rod is rotatably connected with the round rod;The panel of footboard is formed by splicing the first panel and the second panel;The back of the first panel and the second panel is connected with a circular-arc clamping groove, the inner side of the side plate is provided with a corresponding stud, and the stud is inserted into the circular-arc inner buckle and the circular-arc clamping groove.The utility model has the advantages that the connecting structure of the pull rod and the transverse plate is simple, and the components are convenient to install and disassemble;The footboard is spliced by the first panel and the second panel, reducing the volume, facilitating transportation, the stud is inserted into the circular-arc clamping groove on the panel, and the panel is connected with the reinforcing rib, the overall strength of the panel is higher, and the support stability is better.

Description

Technical Field

[0001] This utility model relates to the field of household ladder technology, specifically to a household A-frame ladder. Background Technology

[0002] Currently, there are various types of ladders for climbing, including single ladders and A-frame ladders formed by connecting the tops of two single ladders. Household ladders are mainly used on flat indoor work surfaces. Chinese patent document CN201020101068.6 discloses a household ladder with an A-frame structure. When in use, the front and rear frame components unfold, and the footboards also unfold. When not in use, the front and rear frame components can be folded together, and the footboards rotate to fold away, making it easy to move and store, and taking up little space. However, the connection structure of some components in this type of ladder is relatively cumbersome, and the installation and disassembly of components are troublesome. In addition, in existing technologies, the footboards are usually a single piece, which is bulky and inconvenient to transport. Furthermore, the footboard panel is just a single board structure without other reinforcement, resulting in generally low overall strength and insufficient stability, which needs improvement. There is a need to provide a household A-frame ladder to solve these problems. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a household A-frame ladder that can solve the problems of the existing ladder, such as complicated connection structure of some parts, troublesome installation and disassembly of parts, the step is usually a whole structure, which is large in size, troublesome to transport, and the step panel is just a single board structure, which has general strength and insufficient support stability.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: It includes a front frame assembly, a rear frame assembly, and a connecting limiting device. The front frame assembly consists of a front support, foot pedals, and connecting rods. Several parallel foot pedals are installed on the front support from bottom to top. The front end of each foot pedal forms a hinge structure with the front support, and the rear end of each foot pedal forms a hinge structure with the connecting rod. The rear frame assembly includes two rear supports and a horizontal plate installed on the rear supports. The top ends of the two rear supports are respectively hinged to the front support. The connecting limiting device includes a pull rod. Two pull rods are arranged in parallel, and the connecting rod is connected to the rear frame assembly through the pull rod. The horizontal plate is fixedly connected to the sides of the two rear supports. There are three horizontal plates, each with a hollow structure. The top of the middle horizontal plate has two notches, and a round rod passes through the middle horizontal plate. Both ends of the horizontal plate are closed by end caps. A protrusion is integrally connected to one side of the end cap. The protrusion extends into the interior of the horizontal plate and engages with it. The interior of the protrusion has a locking hole, and the end of the round rod is fixedly engaged in the locking hole. One end of the pull rod is hinged to the side of the connecting rod and a foot pedal, and the other end of the pull rod is located in the notch at the top of the middle horizontal plate. A round rod inside the horizontal plate passes through this end of the pull rod, and the pull rod and the round rod are rotatably connected. The foot pedal includes a panel, a side panel, and an end panel. The panel is formed by splicing a first panel and a second panel. The first panel and the second panel are respectively connected and fixed to the side panel. The back of the first panel near the second panel is connected to an arc-shaped inner buckle, and the back of the second panel near the first panel is connected to an arc-shaped outer buckle. The arc-shaped inner buckle is inserted into the arc-shaped outer buckle to connect the first panel and the second panel. Both the back of the first panel and the second panel are connected to arc-shaped slots. The inner side of the side panel is provided with studs corresponding to the positions of the arc-shaped inner buckle and the arc-shaped slots. The studs are inserted into the arc-shaped inner buckle and the arc-shaped slots. The end plate is integrally formed with the panel, and the end plate is bent and located at both ends of the panel.

[0005] Furthermore, the connecting rod is located between the pull rod and the foot pedal.

[0006] Furthermore, the end plate is also connected to an arc-shaped slot on the back side away from the panel, and a stud is provided on the inner side of the side plate near the end plate. The stud is inserted into the arc-shaped slot on the back side of the end plate to fix the end plate.

[0007] Furthermore, the arc-shaped slot, the arc-shaped inner buckle, and the arc-shaped outer buckle are all connected to the panel through reinforcing ribs, and the two ends of the reinforcing ribs are set to abut against the inner side of the side panel.

[0008] Furthermore, the back of the first panel and the second panel are also connected with reinforcing ribs.

[0009] With the above structure, the advantages of this utility model are as follows: the ladder unfolds the footboard through the connecting rod and the pull rod. One end of the pull rod is located in the notch at the top of the middle horizontal plate, and the round rod inside the horizontal plate passes through the end of the pull rod, so that the pull rod and the round rod are rotatably connected. The round rod passes through the middle horizontal plate and is fixed by the protrusion connected to one side of the end cap. The round rod is easy to install, the connection structure between the pull rod and the horizontal plate is simple, and the components are easy to install and disassemble. The connecting rod, pull rod, and foot pedal are hinged at the same point, making installation and connection more convenient. The foot pedal is designed by splicing the first panel and the second panel together, which reduces the volume and facilitates transportation. The first panel, the second panel and the end plate are fixed with studs inserted in the arc-shaped grooves. The arc-shaped grooves, the arc-shaped inner buckles and the arc-shaped outer buckles are all connected to the panel by reinforcing ribs, which makes the overall strength of the panel higher and the support more stable. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the ladder's retractable structure according to this utility model; Figure 2 This is a schematic diagram of the unfolded ladder structure of this utility model; Figure 3 This is a partial structural schematic diagram of the present invention; Figure 4 This is a schematic diagram of the connection structure between the end cap of the horizontal plate and the round rod of this utility model. Figures 5-6 This is a schematic diagram of the foot pedal of this utility model. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments can enable those skilled in the art to more fully understand this utility model, but do not limit the present utility model to the scope of the described embodiments.

[0012] This specific implementation method adopts the following technical solution: (e.g.) Figure 1 and Figure 2 As shown, a household A-frame ladder includes a front frame assembly 1, a rear frame assembly 2, and a connecting and limiting device 3. The front frame assembly 1 consists of a front support 11, foot pedals 12, and connecting rods 13. Several parallel foot pedals 12 are mounted on the front support 11 from bottom to top. The front end of each foot pedal 12 is hinged to the front support 11, and the rear end of each foot pedal 12 is hinged to the connecting rod 13. The rear frame assembly 2 includes two rear supports 21 and a cross plate 22 mounted on the rear supports 21. The top ends of the two rear supports 21 are hinged to the front support 11. The connecting and limiting device 3 includes a pull rod 31. The two pull rods 31 are arranged in parallel and connect the connecting rod 13 to the rear frame assembly 2. When the rear frame assembly 2 and the front frame assembly 1 are unfolded, the rear frame assembly 2 will drive the pull rod 31 to open, and the pull rod 31 will drive the connecting rod 13 to unfold, so that the foot pedals 12 are unfolded into a horizontal state, allowing climbing.

[0013] like Figure 3 and Figure 4As shown, the horizontal plate 22 is connected and fixed to the rear side of the two rear brackets 21. There are three horizontal plates 22. The horizontal plate 22 is a hollow structure. The top of the middle horizontal plate 22 has two notches 221. A round rod 222 is inserted inside the middle horizontal plate 22. The two ends of the horizontal plate 22 are closed by end caps 223. A protrusion 2231 is integrally connected to one side of the end cap 223. The protrusion 2231 extends into the interior of the horizontal plate 22 and is engaged and fixed with the horizontal plate 22. The interior of the protrusion 2231 has a locking hole 2232. The end of the round rod 222 is fixed in the locking hole 2232. One end of the pull rod 31 is located in the notch 221 at the top of the middle horizontal plate 22. The round rod 222 inside the horizontal plate 22 passes through the end of the pull rod 31. The pull rod 31 and the round rod 222 are rotatably connected. The round rod 222 is easy to install. The connection structure between the pull rod 31 and the horizontal plate 22 is simple. The components are easy to install and disassemble.

[0014] The other end of the pull rod 31 is hinged to the side of the connecting rod 13 and one of the foot pedals 12. The connecting rod 13 is located between the pull rod 31 and the foot pedal 12. The connecting rod 13, the pull rod 31, and the foot pedal 12 are hinged at the same place, making installation and connection more convenient.

[0015] like Figure 5 and Figure 6 As shown, the foot pedal 12 includes a front panel, a side panel 123, and an end panel 124. The front panel is formed by splicing a first panel 121 and a second panel 122. The first panel 121 and the second panel 122 are respectively connected and fixed to the side panel 123. An arc-shaped inner buckle 125 is connected to the back of the first panel 121 near the second panel 122. An arc-shaped outer buckle 126 is connected to the back of the second panel 122 near the first panel 121. The arc-shaped inner buckle 125 is inserted into the arc-shaped outer buckle 126 to connect the first panel 121 and the second panel 122. The foot pedal 12 is set by splicing the first panel 121 and the second panel 122 to reduce the volume and facilitate transportation.

[0016] The back of both the first panel 121 and the second panel 122 are connected to arc-shaped slots 127. The inner side of the side panel 123 is provided with studs 128 corresponding to the positions of the arc-shaped inner buckle 125 and the arc-shaped slots 127. The studs 128 are inserted into the arc-shaped inner buckle 125 and the arc-shaped slots 127 to limit the first panel 121 and the second panel 122.

[0017] The end plate 124 is integrally formed with the panel. The end plate 124 is bent and set at both ends of the panel. The back of the end plate 124 away from the panel is also connected to an arc-shaped slot 127. The inner side of the side plate 123 is provided with a stud 128 near the end plate 124. The stud 128 is inserted into the arc-shaped slot 127 on the back of the end plate 124 to fix the end plate 124.

[0018] The arc-shaped slot 127, the arc-shaped inner buckle 125, and the arc-shaped outer buckle 126 are all connected to the panel through the reinforcing rib 129. The back of the first panel 121 and the second panel 122 are also connected to the reinforcing rib 129, and the two ends of the reinforcing rib 129 are set against the inner side of the side panel 123, so that the overall strength of the panel is higher and the support stability is better.

[0019] Working principle: When the rear frame assembly 2 and the front frame assembly 1 are unfolded, the rear frame assembly 2 will drive the pull rod 31 to open, and the pull rod 31 will drive the connecting rod 13 to unfold, so that the foot pedal 12 unfolds to a horizontal state, allowing climbing; the ladder unfolds the foot pedal 12 through the connecting rod 13 and the pull rod 31. One end of the pull rod 31 is located in the notch 221 at the top of the middle horizontal plate 22, and the round rod 222 in the horizontal plate 22 passes through this end of the pull rod 31, so that the pull rod 31 and the round rod 222 are rotatably connected, and the round rod 222 passes through the middle horizontal plate 22 and is fixed by the protrusion 2231 connected to one side of the end cap 223. 222 is easy to install. The connection structure between the pull rod 31 and the cross plate 22 is simple, and the components are easy to install and disassemble. The connecting rod 13 is hinged to the pull rod 31 and the foot pedal 12 at the same place, making the installation and connection more convenient. The foot pedal 12 is set by splicing the first panel 121 and the second panel 122 to reduce the volume and facilitate transportation. The arc-shaped slots 127 on the first panel 121, the second panel 122, and the end plate 124 are limited by studs 128 inserted in them. The arc-shaped slots 127, the arc-shaped inner buckles 125, and the arc-shaped outer buckles 126 are all connected to the panels by reinforcing ribs 129, which increases the overall strength of the panels and provides better support stability.

[0020] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A household A-frame ladder, comprising a front frame assembly, a rear frame assembly, and a connecting limiting device, wherein the front frame assembly consists of a front support, foot pedals, and connecting rods, and a plurality of parallel foot pedals are mounted on the front support from bottom to top, the front end of each foot pedal forming a hinge structure with the front support, and the rear end of each foot pedal forming a hinge structure with the connecting rod; the rear frame assembly comprises two rear supports and a crossbar mounted on the rear supports, the top ends of the two rear supports respectively forming hinges with the front supports; the connecting limiting device comprises a pull rod, two pull rods being arranged in parallel, and the connecting rods connecting the connecting rod to the rear frame assembly; characterized in that: The horizontal plate is connected and fixed to the sides of the two rear supports. There are three horizontal plates. The horizontal plate is hollow. The top of the middle horizontal plate has two notches. A round rod is inserted through the middle horizontal plate. The two ends of the horizontal plate are closed by end caps. A protrusion is integrally connected to one side of the end cap. The protrusion extends into the interior of the horizontal plate and is engaged and fixed with the horizontal plate. The protrusion has a locking hole inside. The end of the round rod is locked in the locking hole. One end of the pull rod is hinged to the side of the connecting rod and a foot pedal, and the other end of the pull rod is located in the notch at the top of the middle horizontal plate. A round rod inside the horizontal plate passes through this end of the pull rod, and the pull rod and the round rod are rotatably connected. The foot pedal includes a panel, a side panel, and an end panel. The panel is formed by splicing a first panel and a second panel. The first panel and the second panel are respectively connected and fixed to the side panel. The back of the first panel near the second panel is connected to an arc-shaped inner buckle, and the back of the second panel near the first panel is connected to an arc-shaped outer buckle. The arc-shaped inner buckle is inserted into the arc-shaped outer buckle to connect the first panel and the second panel. Both the back of the first panel and the second panel are connected to arc-shaped slots. The inner side of the side panel is provided with studs corresponding to the positions of the arc-shaped inner buckle and the arc-shaped slots. The studs are inserted into the arc-shaped inner buckle and the arc-shaped slots. The end plate is integrally formed with the panel, and the end plate is bent and located at both ends of the panel.

2. A household A-frame ladder according to claim 1, characterized in that: The connecting rod is located between the pull rod and the foot pedal.

3. A household A-frame ladder according to claim 1, characterized in that: The end plate, away from the panel, is also connected to an arc-shaped slot on its back side. The inner side of the side plate, near the end plate, is provided with a stud. The stud is inserted into the arc-shaped slot on the back of the end plate to fix the end plate.

4. A household A-frame ladder according to claim 1, characterized in that: The arc-shaped slot, the arc-shaped inner buckle, and the arc-shaped outer buckle are all connected to the panel through reinforcing ribs, and the two ends of the reinforcing ribs are set to abut against the inner side of the side panel.

5. A household A-frame ladder according to claim 1, characterized in that: The back of the first panel and the second panel are also connected with reinforcing ribs.

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