Multifunctional folding ladder

Abstract

The utility model belongs to the technical field of folding ladders, and particularly relates to a multifunctional folding ladder which comprises a first ladder frame and a second ladder frame, the two ends of the first ladder frame are rotationally connected with the second ladder frame through folding joints respectively, a detachable guardrail assembly is installed on the upper end face of the first ladder frame, and the guardrail assembly comprises a left guardrail and a right guardrail. The folding ladder comprises a left guardrail and a right guardrail, a door assembly is installed between the left guardrail and the right guardrail, one side of the door assembly is rotatably connected with the guardrails, and a switch is arranged between the other side of the door assembly and the guardrails. After the ladder assemblies are rotated through the folding joints, the first ladder assembly and the second ladder assembly form a linear ladder for use, and the linear ladder has multiple functions and can be changed according to different use requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of folding ladders, in particular to a multifunctional folding ladder. Background Art

[0002] Existing aluminum platform ladders generally consist of a ladder frame and a platform. The ladder frame is hingedly connected to both ends of the platform. When in use, the ladder frame is unfolded to support the platform.

[0003] For example, the Chinese utility model, patent number CN201921911530.6, discloses a platform ladder, including a ladder frame, a platform and a telescopic foot. The ladder frame is hingedly connected to the two ends of the platform by a hinge. A telescopic foot slide is fixedly installed on the ladder foot of the ladder frame, and a positioning gear block mounting shaft is provided on the telescopic foot slide. A positioning gear block is installed on the positioning gear block mounting shaft, and a mounting shaft hole is provided on the positioning gear block. The positioning gear block is installed on the positioning gear block mounting shaft through the mounting shaft hole and is connected to the positioning gear block mounting shaft through a gear block torsion spring. A toggle part is extended on the positioning gear block. The telescopic foot is inserted into the telescopic foot slide and is located on the outside of the ladder foot of the ladder frame. A rack is fixed on the telescopic foot. The positioning gear block is inclined relative to the rack and the positioning gear block and the rack are engaged and can be separated by toggling the toggle part.

[0004] Although the platform ladder can be adjusted up and down by manually pulling the telescopic legs, the platform ladder can only be used as a platform ladder and cannot be used as a ladder. It has a single purpose and a relatively limited usage scenario. Therefore, the structure needs to be further improved. Utility Model Content

[0005] The purpose of the utility model is to provide a multifunctional folding ladder which can be used as a platform ladder and can also be converted into a ladder, thereby solving the problem of single use.

[0006] The purpose of the utility model is achieved as follows: a multifunctional folding ladder comprises a ladder frame one and a ladder frame two, both ends of the ladder frame one are rotatably connected to the ladder frame two via folding joints, a detachable guardrail assembly is installed on the upper end surface of the ladder frame one, the guardrail assembly comprises a left guardrail and a right guardrail, a door assembly is installed between the left guardrail and the right guardrail, one side of the door assembly is rotatably connected to the guardrail, and a switch is provided between the other side of the door assembly and the guardrail.

[0007] Preferably, the second ladder frame includes two inclined ladder side passages, the lower ends of the inclined ladder side passages are connected with telescopic feet, the telescopic feet are movably installed on the outer periphery of the inclined ladder side passages, a pedal is provided between the two telescopic legs, and locks are respectively provided at both ends of the pedals, a spring is provided between the lock and the pedal, a limiting hole 1 for the lock to be inserted is provided on the telescopic foot, and a limiting hole 2 for the lock to be inserted is provided on the inclined ladder side passage.

[0008] Preferably, the folding joint includes a first joint and a second joint rotatably connected thereto, and a limit wrench is provided between the first joint and the second joint for limiting the relative rotation of the two.

[0009] Preferably, the right guardrail includes an upper guardrail post and a lower guardrail post, the lower end of the upper guardrail post is provided with a rotating joint 1, and the upper end of the lower guardrail post is provided with a rotating joint 2 hinged to the rotating joint 1.

[0010] Preferably, the lower column of the guardrail is movably sleeved on the outer periphery of the second rotating joint, a limiting rivet is installed in the lower column of the guardrail, a strip hole for the movement of the limiting rivet is opened in the second rotating joint, an avoidance notch is opened at the upper end of one side of the lower column of the guardrail, a quick-release pin is connected to the side surface of the lower end of the upper column of the guardrail, a limiting hole three for the insertion of the quick-release pin is opened at the upper end of the other side of the lower column of the guardrail, and a limiting hole four for the insertion of the quick-release pin is opened in the first rotating joint.

[0011] Preferably, the lower end of the lower column of the guardrail is connected to an installation aluminum part 1, which is arranged on the outer periphery of the upper end of the ladder frame 1, and the outer periphery of the lower end of the ladder frame 1 is provided with an installation aluminum part 2, and a carriage screw is provided between the installation aluminum part 2 and the installation aluminum part 1, and one end of the carriage screw passes through the installation aluminum part 1 and the installation aluminum part 2 in sequence and is connected to a butterfly nut.

[0012] Preferably, an inner tee is provided in the upper column of the guardrail, and the side of the inner tee is connected to the middle channel of the guardrail.

[0013] Preferably, the upper end of the guardrail upper column is connected to an elbow, and the other end of the elbow is connected to the guardrail upper cross-connection.

[0014] Preferably, the ladder frame 1 includes two middle ladder side passages, a plurality of transverse frames 1 are installed between the two middle ladder side passages, and the upper end surface of the transverse frame 1 is provided with a platform plate.

[0015] Preferably, a fixed limit plate is installed on the lower end surface of one side of the platform plate to abut against the lower end surface of the cross frame 1, and a screw is provided on the lower end surface of the other side of the platform plate, and a movable limit plate and an adjusting nut are respectively installed on the outer periphery of the screw.

[0016] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0017] The utility model adopts a novel structural design so that the folding ladder can be installed with a guardrail assembly for use as a platform ladder, and can also be used as a straight ladder by removing the guardrail assembly and then rotating the ladder frame through the folding joint, so that the ladder frame one and the ladder frame two can be formed into a straight ladder. The utility model has multiple functions and can be transformed according to different usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the guardrail assembly when the utility model is installed.

[0019] Figure 2 Schematic diagram of the structure of ladder frame 1 and ladder frame 2.

[0020] Figure 3 This is a structural diagram of ladder frame 1.

[0021] Figure 4 Schematic diagram of the structure of the guardrail assembly.

[0022] Figure 5 This is a structural diagram of ladder frame 2.

[0023] Figure 6 This is a structural diagram of the connection between the upper guardrail post and the lower guardrail post.

[0024] Figure 7 This is a structural diagram of the guardrail upper post and the guardrail lower post when they are separated.

[0025] Reference numerals: 1-ladder frame 1; 2-ladder frame 2; 3-folding joint; 4-guardrail assembly; 5-left guardrail; 6-right guardrail; 7-door assembly; 8-switch; 9-slanted ladder side passage; 10-telescopic foot; 11-pedal; 12-lock; 13-limiting hole 1; 14-limiting hole 2; 15-first joint; 16-second joint; 17-limiting wrench; 18-guardrail upper post; 19-guardrail lower post; 20-rotating joint 1; 21-rotating joint 2;

[0026] 22 - Limit rivet; 23 - Strip hole; 24 - Avoidance notch; 25 - Quick release pin; 26 - Limit hole three; 27 - Limit hole four; 28 - Install aluminum part one; 29 - Install aluminum part two; 30 - Carriage screw; 31 - Butterfly nut; 32 - Internal tee; 33 - Guardrail middle connection; 34 - Elbow; 35 - Guardrail upper cross connection; 36 - Middle ladder side connection;

[0027] 37- horizontal frame 1; 38- platform plate; 39- fixed limit plate; 40- screw rod; 41- movable limit plate; 42- adjusting nut. DETAILED DESCRIPTION

[0028] The specific implementation of the present invention is further described in detail below with reference to the accompanying drawings.

[0029] like Figure 1-7As shown, a multifunctional folding ladder includes a ladder frame 1 and a ladder frame 2. The two ends of the ladder frame 1 are rotatably connected to the ladder frame 2 via a folding joint 3. A detachable guardrail assembly 4 is installed on the upper end surface of the ladder frame 1. The guardrail assembly 4 includes a left guardrail 5 and a right guardrail 6. A door assembly 7 is installed between the left guardrail 5 and the right guardrail 6. One side of the door assembly 7 is rotatably connected to the guardrail, and a switch 8 is provided between the other side of the door assembly 7 and the guardrail.

[0030] The utility model adopts a novel structural design so that the folding ladder can be installed with the guardrail assembly 4 for use as a platform ladder, and can also be used as a straight ladder by removing the guardrail assembly 4 and then rotating the ladder frame through the folding joint, so that the ladder frame one and the ladder frame two can be formed into a straight ladder. It has multiple functions and can be transformed according to different usage requirements.

[0031] Furthermore, by removing the guardrail assembly 4, it can be folded and stored, and the ladder frame can also be folded and stored through the folding joints, thereby reducing the occupied space and reducing the transportation cost.

[0032] Combine Figure 2 and Figure 5 The ladder frame 2 includes two inclined ladder side passages 9, the lower ends of the inclined ladder side passages 9 are connected with telescopic legs 10, the telescopic legs 10 are movably installed on the outer periphery of the inclined ladder side passage 9, a pedal 11 is provided between the two telescopic legs, and lock buckles 12 are respectively provided at both ends of the pedal 11, a spring is provided between the lock buckle 12 and the pedal 11, a limiting hole 13 for inserting the lock buckle 12 is provided on the telescopic leg 10, and a limiting hole 2 14 for inserting the lock buckle 12 is provided on the inclined ladder side passage 9.

[0033] Through the design of the telescopic legs 10, this technical solution allows the overall height of the ladder to be adjusted by adjusting the upper and lower positions of the telescopic legs 10 during actual use. When the height needs to be adjusted, the upper and lower positions of the telescopic legs 10 can be adjusted by pulling the lock buckle 12 out of the limiting hole. After adjusting to the appropriate position, the lock buckle is released, and the lock buckle can be pulled by the spring to automatically snap into the limiting hole, thereby fixing the position of the telescopic leg.

[0034] Combine Figure 2 and Figure 3 The folding joint is an existing accessory on the ladder. The folding joint 3 includes a first joint 15 and a second joint 16 rotatably connected thereto. A limit wrench 17 is provided between the first joint 15 and the second joint 16 for limiting the relative rotation between the two. By rotating the limit wrench 17 to one side, the relative rotation between the first joint 15 and the second joint 16 can be limited. By rotating the limit wrench 17 to the other side, the restriction on the relative rotation between the first joint 15 and the second joint 16 can be released.

[0035] Combine Figure 4 and Figure 6 The right guardrail 6 includes an upper guardrail column 18 and a lower guardrail column 19. The lower end of the upper guardrail column 18 is provided with a rotating joint 20, and the upper end of the lower guardrail column 19 is provided with a rotating joint 21 hinged to the rotating joint 20. The upper guardrail column 18 and the lower guardrail column 19 are rotatably connected to each other for easy folding and storage.

[0036] Combine Figure 6 and Figure 7 The lower guardrail column 19 is movably sleeved on the outer periphery of the second rotating joint 21, and a limit rivet 22 is installed in the lower guardrail column 19. A strip hole 23 is provided in the second rotating joint 21 for the limit rivet 22 to move. An avoidance gap 24 is provided at the upper end of one side of the lower guardrail column 19, and a quick-release pin 25 is connected to the lower end side of the upper guardrail column 18. A limit hole three 26 is provided on the upper end of the other side of the lower guardrail column 19 for inserting the quick-release pin 25, and a limit hole three 27 is provided in the rotating joint 1 20 for inserting the quick-release pin 25.

[0037] During the actual assembly process, the lower guardrail column 19 is first moved upward to the periphery of the rotating joint 1 20, and the limiting hole 3 26 is aligned with the limiting hole 4 27. Then, the quick-release pin 25 is inserted to limit the rotation between the upper guardrail column 18 and the lower guardrail column 19, so that they remain in an upright state.

[0038] When the guardrail needs to be stored, the quick-release pin 25 is first removed from the limiting hole, and then the guardrail lower column 19 is moved downward. At this time, the guardrail upper column 18 and the guardrail lower column 19 can be rotated and stored.

[0039] Combine Figure 6 and Figure 7 The lower end of the guardrail lower column 19 is connected with a mounting aluminum part 28, and the mounting aluminum part 28 is arranged on the outer periphery of the upper end of the ladder frame 1, and the lower periphery of the ladder frame 1 is provided with a mounting aluminum part 29, and a carriage screw 30 is provided between the mounting aluminum part 29 and the mounting aluminum part 28. One end of the carriage screw 30 passes through the mounting aluminum part 28 and the mounting aluminum part 29 in sequence and is connected with a butterfly nut 31. In the actual assembly process, by respectively installing the mounting aluminum part 28 and the mounting aluminum part 28 on the outer periphery of the ladder frame, and then fixing the mounting aluminum part 28 and the mounting aluminum part 28 with screws and nuts, the detachable connection between the guardrail assembly and the ladder frame can be achieved. The connection structure is simple and easy to disassemble and assemble, and no special tools are required for disassembly and assembly.

[0040] Look specifically Figure 4 An inner tee 32 is provided in the guardrail upper column 18, and the side of the inner tee 32 is connected to the guardrail middle passage 33, thereby improving the stability and safety of the guardrail.

[0041] Look specifically Figure 4 The upper end of the guardrail upper column 18 is connected to an elbow 34, and the other end of the elbow 34 is connected to the guardrail upper cross-through 35, thereby improving the stability and safety of the guardrail.

[0042] Combine Figure 2 and Figure 3 The ladder frame 1 includes two middle ladder side passages 36, and several cross-frames 37 are installed between the two middle ladder side passages 36. The upper end surface of the cross-frame 37 is provided with a platform plate 38, so that construction workers can stand on the ladder frame to work more safely and stably.

[0043] Look specifically Figure 3 A fixed limit plate 39 is installed on the lower end surface of one side of the platform plate 38 to abut against the lower end surface of the cross-frame 37. A screw 40 is provided on the lower end surface of the other side of the platform plate 38. A movable limit plate 41 and an adjusting nut 42 are respectively installed on the outer periphery of the screw 40. By rotating the adjusting nut 42, one end of the movable limit plate 41 can abut against the lower end surface of the cross-frame, thereby realizing a fixed connection between the platform 38 and the cross-frame 37.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A multifunctional folding ladder, characterized in that: The invention comprises a ladder frame 1 (1) and a ladder frame 2 (2), wherein both ends of the ladder frame 1 (1) are rotatably connected to the ladder frame 2 (2) via folding joints (3), and a detachable guardrail assembly (4) is installed on the upper end surface of the ladder frame 1 (1), wherein the guardrail assembly (4) comprises a left guardrail (5) and a right guardrail (6), and a door assembly (7) is installed between the left guardrail (5) and the right guardrail (6), wherein one side of the door assembly (7) is rotatably connected to the guardrail, and a switch (8) is provided between the other side of the door assembly (7) and the guardrail.

2. The multifunctional folding ladder according to claim 1, characterized in that: The ladder frame 2 (2) includes two inclined ladder side passages (9), the lower ends of the inclined ladder side passages (9) are connected with telescopic legs (10), the telescopic legs (10) are movably installed on the outer periphery of the inclined ladder side passages (9), a pedal (11) is provided between the two telescopic legs, and lock buckles (12) are respectively provided at both ends of the pedal (11), a spring is provided between the lock buckle (12) and the pedal (11), a limiting hole (13) for inserting the lock buckle (12) is provided on the telescopic legs (10), and a limiting hole (14) for inserting the lock buckle (12) is provided on the inclined ladder side passage (9).

3. The multifunctional folding ladder according to claim 1, characterized in that: The folding joint (3) comprises a first joint (15) and a second joint (16) rotatably connected thereto, and a limit wrench (17) is provided between the first joint (15) and the second joint (16) for limiting relative rotation between the two.

4. The multifunctional folding ladder according to claim 1, characterized in that: The right guardrail (6) includes an upper guardrail column (18) and a lower guardrail column (19), wherein the lower end of the upper guardrail column (18) is provided with a rotating joint 1 (20), and the upper end of the lower guardrail column (19) is provided with a rotating joint 2 (21) hinged to the rotating joint 1 (20).

5. The multifunctional folding ladder according to claim 4, characterized in that: The guardrail lower column (19) is movably sleeved on the outer periphery of the second rotating joint (21), a limit rivet (22) is installed in the guardrail lower column (19), a strip hole (23) for the limit rivet (22) to move is provided in the second rotating joint (21), an avoidance gap (24) is provided on the upper end of one side of the guardrail lower column (19), a quick release pin (25) is connected to the lower end side of the guardrail upper column (18), a limit hole three (26) for the quick release pin (25) to be inserted is provided on the upper end of the other side of the guardrail lower column (19), and a limit hole four (27) for the quick release pin (25) to be inserted is provided in the first rotating joint (20).

6. The multifunctional folding ladder according to claim 4, characterized in that: The lower end of the guardrail lower column (19) is connected to an installation aluminum part (28), and the installation aluminum part (28) is arranged on the outer periphery of the upper end of the ladder frame (1). The outer periphery of the lower end of the ladder frame (1) is provided with an installation aluminum part (29). A carriage screw (30) is provided between the installation aluminum part (29) and the installation aluminum part (28). One end of the carriage screw (30) passes through the installation aluminum part (28) and the installation aluminum part (29) in sequence and is connected to a butterfly nut (31).

7. The multifunctional folding ladder according to claim 4, characterized in that: An inner tee (32) is provided in the guardrail upper column (18), and a side surface of the inner tee (32) is connected to a guardrail middle hole (33).

8. The multifunctional folding ladder according to claim 4, characterized in that: The upper end of the guardrail upper column (18) is connected with an elbow (34), and the other end of the elbow (34) is connected with a guardrail upper cross-through (35).

9. The multifunctional folding ladder according to claim 1, characterized in that: The ladder frame (1) comprises two middle ladder side passages (36), a plurality of transverse frames (37) are installed between the two middle ladder side passages (36), and a platform plate (38) is provided on the upper end surface of the transverse frame (37).

10. The multifunctional folding ladder according to claim 9, characterized in that: A fixed limiting plate (39) is installed on the lower end surface of one side of the platform plate (38) to abut against the lower end surface of the cross frame (37). A screw rod (40) is provided on the lower end surface of the other side of the platform plate (38). A movable limiting plate (41) and an adjusting nut (42) are respectively installed on the outer periphery of the screw rod (40).

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