Building construction ladder with adjustable height

Abstract

The utility model relates to the technical field of construction ladders, in particular to a height-adjustable building construction ladder which comprises two ladder main bodies which are symmetrically arranged, the tops of the two ladder main bodies are rotationally connected through a hinge, and the front side and the rear side of each ladder main body are fixedly connected with mounting plates through bolts. The winding device has the advantages that the control knob is twisted to drive the winding rod to rotate forwards or reversely in the storage barrel, the annular limiting belt can be wound and unwound while the winding rod rotates, the control panel is loosened until the exposed length of the annular limiting belt outside is proper, the stretched spring can reset at the moment, and the annular limiting belt can be wound and unwound. The locking pins can be driven to be inserted into the corresponding locking holes, the winding rod can be locked in the storage cylinder, the length of the annular limiting belt exposed to the outside can be conveniently adjusted by controlling the winding and unwinding length of the annular limiting belt, and then the opening and closing angle between the two ladder bodies can be controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of construction ladders, in particular to a building construction ladder with adjustable height. Background Technique

[0002] Construction ladders are indispensable auxiliary tools in the construction process. Their core purpose is to provide a safe and stable high-altitude working platform for construction workers, facilitating various high-altitude construction tasks such as wall decoration, pipeline installation, lamp replacement, and equipment maintenance. In construction sites, decoration sites, equipment maintenance places, etc., the figure of construction ladders can be seen everywhere. Construction ladders generally refer to ladder structures with a certain height and bearing capacity. Common types include folding ladders, straight ladders, telescopic ladders, etc. Among them, folding ladders are extremely widely used in the construction field due to their unique structural design. A folding ladder is composed of two inclined ladders combined through a top connector, forming a shape similar to the Chinese character "人" (person). This structure makes the folding ladder have high stability when unfolded, effectively dispersing the weight of construction workers and construction materials and reducing the risk of tipping.

[0003] However, traditional folding ladders have an obvious defect, that is, their height adjustment is inconvenient. The length of the limit belt is generally fixed, which results in a fixed angle after the folding ladder is unfolded. In the actual construction process, different construction scenarios have different requirements for the height of the ladder. For example, when painting a wall at a relatively low height, a lower ladder height may be required; while for pipeline installation at a higher position, a higher ladder height is needed. However, due to the fixed height of traditional folding ladders, they cannot be flexibly adjusted according to actual needs. Content of the Utility Model

[0004] The purpose of the utility model aims to solve at least one of the above technical defects.

[0005] For this reason, one purpose of the utility model is to propose a building construction ladder with adjustable height to solve the problems mentioned in the background technique and overcome the deficiencies existing in the prior art.

[0006] To achieve the above objectives, one embodiment of this utility model provides an adjustable-height construction ladder, comprising two symmetrically arranged ladder bodies. The tops of the two ladder bodies are rotatably connected by hinges. Mounting plates are bolted to the front and rear sides of each ladder body. A connecting rod is fixedly connected between the two corresponding mounting plates. An annular limiting band is slidably connected between the two connecting rods. A winding rod is fixedly connected to the outer surface of the annular limiting band. A storage cylinder is rotatably connected to the outer surface of the winding rod via a bearing. The annular limiting band and the storage cylinder are slidably connected. The axis of the storage cylinder coincides with that of the winding rod. A sealing plate is fixedly installed at the open end of the storage tube by bolts. The winding rod is rotatably connected to the sealing plate. A first blocking disc and a second blocking disc are fixedly connected to the outer surface of the winding rod. Both the first and second blocking discs are rotatably connected to the storage tube. The distance between the first and second blocking discs is equal to the width of the annular limiting band. Two symmetrically arranged springs are fixedly connected to the side of the sealing plate away from the storage tube. A control plate is fixedly connected to the end of the two springs away from the sealing plate. Two symmetrically arranged locking pins are fixedly connected to the side of the control plate near the sealing plate. Both locking pins penetrate the sealing plate and engage with the second blocking disc.

[0007] Preferably, in any of the above embodiments, two symmetrically arranged blocking rings are fixedly connected to the outer surface of each connecting rod, a pressure rod is fixedly connected between the two blocking rings, the distance between the two blocking rings is equal to the width of the annular limiting band, and the annular limiting band is slidably connected to the pressure rod.

[0008] Preferably, in any of the above embodiments, the end of the storage tube furthest from the sealing plate is rotatably connected to a control knob via a bearing, and the control knob is fixedly connected to the winding rod.

[0009] Preferably, one side of the sealing plate has a through-hole for rotation, and the winding rod is rotatably connected to the sealing plate through the through-hole.

[0010] Preferably, in any of the above solutions, the outer surface of the storage tube has two symmetrically arranged clearance grooves, and the annular limiting band is slidably connected to the storage tube through the clearance grooves.

[0011] Preferably, in any of the above solutions, two symmetrically arranged guide rods are fixedly connected to the side of the sealing plate away from the storage cylinder, and the control plate is slidably connected to the guide rods.

[0012] Preferably, in any of the above schemes, the second blocking plate has a plurality of circumferentially arrayed locking holes on the side away from the first blocking plate, and both locking pins penetrate the sealing plate and engage with the second blocking plate through the locking holes.

[0013] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0014] When the height of the construction ladder needs to be adjusted, the worker can pull the control plate outward to move the locking pin outward. As the spring is stretched, the locking pin will move out of the locking hole, releasing the lock on the second blocking plate. At this time, turning the control knob will cause the winding rod to rotate clockwise or counterclockwise inside the storage cylinder. While the winding rod is rotating, the annular limit band can be wound up and unwound until the length of the annular limit band exposed to the outside is appropriate. Then, the control plate can be released, and the stretched spring will return to its original position, allowing the locking pin to be inserted into the corresponding locking hole, locking the winding rod inside the storage cylinder. By controlling the length of the annular limit band being wound up and unwound, the length of the annular limit band exposed to the outside can be adjusted, thereby controlling the opening angle between the two ladder bodies, which facilitates the adjustment of the height of the construction ladder. At the same time, a support roller is rotatably connected to the outer surface of the storage cylinder, which can support the annular limit band and prevent friction between the annular limit band and the storage cylinder. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the assembly of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the annular limiting band of this utility model;

[0017] Figure 3 This is a cross-sectional structural diagram of the annular limiting band of this utility model;

[0018] Figure 4 This is a schematic diagram of the connecting rod of this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the storage tube of this utility model;

[0020] Figure 6 This is a schematic diagram of the first exploded structure of the storage tube of this utility model;

[0021] Figure 7 This is a schematic diagram of the second exploded structure of the storage tube of this utility model.

[0022] In the diagram: 1-ladder body, 2-mounting plate, 3-connecting rod, 4-ring limit band, 5-rewinding rod, 6-storage cylinder, 7-sealing plate, 8-first blocking plate, 9-second blocking plate, 10-spring, 11-control plate, 12-locking pin, 13-pressure rod, 14-control knob, 15-rotation hole, 16-clearance groove, 17-guide rod, 18-locking hole, 19-blocking ring. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited thereto.

[0024] like Figures 1 to 7 As shown, an adjustable-height construction ladder includes two symmetrically arranged ladder bodies 1. The tops of the two ladder bodies 1 are rotatably connected by hinges. Mounting plates 2 are bolted to both the front and rear sides of each ladder body 1. A connecting rod 3 is fixedly connected between the two corresponding mounting plates 2. An annular limiting band 4 is slidably connected between the two connecting rods 3. A winding rod 5 is fixedly connected to the outer surface of the annular limiting band 4. A storage cylinder 6 is rotatably connected to the outer surface of the winding rod 5 via bearings. The annular limiting band 4 and the storage cylinder 6 are slidably connected. The axis of the storage cylinder 6 coincides with that of the winding rod 5. The open end of the storage cylinder 6 is fixedly installed with a... The sealing plate 7 and the winding rod 5 are rotatably connected to the sealing plate 7. The outer surface of the winding rod 5 is fixedly connected to the first blocking disc 8 and the second blocking disc 9. The first blocking disc 8 and the second blocking disc 9 are both rotatably connected to the storage cylinder 6. The distance between the first blocking disc 8 and the second blocking disc 9 is equal to the width of the annular limiting band 4. Two symmetrically arranged springs 10 are fixedly connected to the side of the sealing plate 7 away from the storage cylinder 6. The end of the two springs 10 away from the sealing plate 7 is fixedly connected to the control plate 11. Two symmetrically arranged locking pins 12 are fixedly connected to the side of the control plate 11 close to the sealing plate 7. Both locking pins 12 penetrate the sealing plate 7 and are engaged with the second blocking disc 9.

[0025] As an optional technical solution of this utility model, two symmetrically arranged blocking rings 19 are fixedly connected to the outer surface of each connecting rod 3. A pressure rod 13 is fixedly connected between the two blocking rings 19. The distance between the two blocking rings 19 is equal to the width of the annular limiting band 4. The annular limiting band 4 is slidably connected to the pressure rod 13. The cooperation between the blocking rings 19 and the pressure rod 13 ensures that the annular limiting band 4 maintains stable sliding on the connecting rod 3, ensuring that the limiting band will not deviate during the ladder height adjustment process, thus improving the safety of use.

[0026] As an optional technical solution of this utility model, the end of the storage cylinder 6 away from the sealing plate 7 is rotatably connected to a control knob 14 through a bearing. The control knob 14 is fixedly connected to the winding rod 5. The control knob 14 is connected to the winding rod 5 through the bearing, making the operation more effortless and smooth, and making it easy for construction workers to adjust the height of the ladder with one hand.

[0027] As an optional technical solution of this utility model, a rotating hole 15 is provided through one side of the sealing plate 7. The winding rod 5 is rotatably connected to the sealing plate 7 through the rotating hole 15. The design of the rotating hole 15 enables the winding rod 5 to rotate smoothly on the sealing plate 7, avoids jamming during the winding process, and ensures smooth winding and unwinding of the annular limiting belt 4.

[0028] As an optional technical solution of this utility model, two symmetrically arranged clearance grooves 16 are opened through the outer surface of the storage tube 6. The annular limiting band 4 is slidably connected to the storage tube 6 through the clearance grooves 16. The clearance grooves 16 provide a smooth passage for the annular limiting band 4 to enter and exit, ensuring that the limiting band is neatly arranged in the storage tube 6 and preventing tangling.

[0029] As an optional technical solution of this utility model, the sealing plate 7 is fixedly connected to two symmetrically arranged guide rods 17 on the side away from the storage cylinder 6. The control plate 11 is slidably connected to the guide rods 17. The guide rods 17 provide a stable sliding track for the control plate 11, so that the locking pin 12 can be accurately aligned with the locking hole 18, thereby improving the reliability of the ladder when it is fixed.

[0030] As an optional technical solution of this utility model, the second blocking plate 9 has a plurality of circumferentially arrayed locking holes 18 on the side away from the first blocking plate 8. Both locking pins 12 penetrate the sealing plate 7 and are engaged with the second blocking plate 9 through the locking holes 18. The engagement structure of the locking holes 18 and the locking pins 12 makes the ladder height more firmly fixed, prevents accidental slippage during construction, and ensures work safety.

[0031] An adjustable-height construction ladder works on the following principle:

[0032] 1) When the height of the construction ladder needs to be adjusted, the staff can pull the control plate 11 outward to make the locking pin 12 move outward. As the spring 10 is stretched, the locking pin 12 will move out of the locking hole 18, which can release the lock on the second blocking plate 8.

[0033] 2): Twist the control knob 14 to make the winding rod 5 rotate forward or backward inside the storage cylinder 6. While the winding rod 5 is rotating, it can wind and unwind the annular limit belt 4 until the length of the annular limit belt 4 exposed to the outside is appropriate, then release the control plate 11.

[0034] 3): At this time, the stretched spring 10 will return to its original position, which can drive the locking pin 12 to be inserted into the corresponding locking hole 18, and lock the winding rod 5 inside the storage tube 5. By controlling the length of the winding and unwinding of the annular limit band 4, it is convenient to adjust the length of the annular limit band 4 exposed to the outside.

[0035] In summary, when the height of this adjustable construction ladder needs to be adjusted, the worker can pull the control plate 11 outward to move the locking pin 12 outward. As the spring 10 is stretched, the locking pin 12 will move out of the locking hole 18, which can release the lock on the second blocking plate 8. At this time, turning the control knob 14 will cause the winding rod 5 to rotate forward or backward inside the storage cylinder 6. While the winding rod 5 is rotating, it can wind and unwind the annular limiting band 4 until the length of the annular limiting band 4 exposed to the outside is appropriate. Then, the control plate 11 is released, and the stretched spring 10 will return to its original position, which can drive the locking pin 12 to be inserted into the corresponding locking hole 18, locking the winding rod 5 inside the storage cylinder 5. By controlling the length of the annular limiting band 4 being wound and unwound, it is convenient to adjust the length of the annular limiting band 4 exposed to the outside, thereby controlling the opening angle between the two ladder bodies 1, and thus facilitating the adjustment of the height of the construction ladder.

Claims

1. A height-adjustable construction ladder, characterized in that: The system includes two symmetrically arranged ladder bodies (1), the tops of which are rotatably connected by hinges. Each ladder body (1) has mounting plates (2) fixedly connected to its front and rear sides by bolts. A connecting rod (3) is fixedly connected between the two corresponding mounting plates (2). An annular limiting band (4) is slidably connected between the two connecting rods (3). A winding rod (5) is fixedly connected to the outer surface of the annular limiting band (4). A storage cylinder (6) is rotatably connected to the outer surface of the winding rod (5) via a bearing. The annular limiting band (4) and the storage cylinder (6) are slidably connected. The axis of the storage cylinder (6) coincides with that of the winding rod (5). A sealing plate (7) is fixedly installed at the open end of the storage cylinder (6) by bolts. The winding rod (5)... The outer surface of the winding rod (5) is fixedly connected to the sealing plate (7) and the first blocking plate (8) and the second blocking plate (9). The first blocking plate (8) and the second blocking plate (9) are both rotatably connected to the storage cylinder (6). The distance between the first blocking plate (8) and the second blocking plate (9) is equal to the width of the annular limiting band (4). Two symmetrically arranged springs (10) are fixedly connected to the side of the sealing plate (7) away from the storage cylinder (6). A control plate (11) is fixedly connected to the end of the two springs (10) away from the sealing plate (7). Two symmetrically arranged locking pins (12) are fixedly connected to the side of the control plate (11) close to the sealing plate (7). The two locking pins (12) penetrate the sealing plate (7) and engage with the second blocking plate (9).

2. The adjustable-height construction ladder according to claim 1, characterized in that: Two symmetrically arranged blocking rings (19) are fixedly connected to the outer surface of each of the connecting rods (3). A pressure rod (13) is fixedly connected between the two blocking rings (19). The distance between the two blocking rings (19) is equal to the width of the annular limiting band (4). The annular limiting band (4) is slidably connected to the pressure rod (13).

3. A height adjustable construction ladder according to claim 2, characterised in that: The end of the storage tube (6) away from the sealing plate (7) is rotatably connected to a control knob (14) via a bearing, and the control knob (14) is fixedly connected to the winding rod (5).

4. A height adjustable construction ladder according to claim 3, characterised in that: A rotating hole (15) is provided through one side of the sealing plate (7), and the winding rod (5) is rotatably connected to the sealing plate (7) through the rotating hole (15).

5. A height adjustable construction ladder according to claim 4, characterised in that: The outer surface of the storage tube (6) has two symmetrically arranged clearance grooves (16), and the annular limiting band (4) is slidably connected to the storage tube (6) through the clearance grooves (16).

6. A height adjustable construction ladder according to claim 5, characterised in that: The sealing plate (7) is fixedly connected to two symmetrically arranged guide rods (17) on the side away from the storage cylinder (6), and the control plate (11) is slidably connected to the guide rods (17).

7. A height adjustable construction ladder according to claim 6, characterised in that: The second blocking plate (9) has a plurality of circumferentially arrayed locking holes (18) on the side away from the first blocking plate (8). Both locking pins (12) penetrate the sealing plate (7) and engage with the second blocking plate (9) through the locking holes (18).

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