Double-foot ladder for construction and erection method

Abstract

The invention belongs to the technical field of building construction auxiliary equipment, and relates to a double-foot ladder for construction and an erecting method.The double-foot ladder is characterized in that a ladder frame is rotationally installed on a seat plate, a supporting bracket is rotationally installed on the outer side of the ladder frame, a supporting rod supporting block is arranged in the ladder frame, and a supporting rod is arranged in the supporting bracket, so that the supporting bracket is fixed to the supporting rod supporting block after rotating; and an anti-skid base is rotationally mounted at the end part of the supporting bracket through a base steering driving piece. The supporting bracket is matched with the anti-skid base, a benchmark for a worker to support or lean on the body in the construction process is provided, the safety of the construction worker is guaranteed, meanwhile, the supporting bracket and the roof are used for supporting, the high-strength bearing performance is achieved, the angle of the supporting bracket can be adjusted, and the safety of the construction worker is improved. And the supporting rod supporting block cooperates with the supporting rod, so that the supporting bracket can be quickly and conveniently fixed at the required position, and complicated operation steps are not needed.

Description

Technical Field

[0001] This invention relates to the field of auxiliary equipment technology for building construction, and in particular to a double-legged ladder for construction and its erection method. Background Technology

[0002] In the interior construction phase of the building engineering field, there are many specific tasks, such as plastering interior walls and roofs, or drilling holes to install water pipes, air ducts and other facilities. In these operations, ladders play an indispensable and crucial role. Among them, double ladders, with their unique design advantages, have become one of the most convenient tools used in interior construction.

[0003] The double-legged ladder's structural design allows workers to stand stably on it, thus enabling them to carry out various construction operations on the wall more safely, greatly improving the efficiency and quality of interior wall construction.

[0004] However, in actual indoor construction, when workers need to work on walls and ceilings, due to the special nature of ceiling construction, workers need to tilt their heads up to see the work area clearly. As their line of sight tilts, their balance is easily affected. At this time, workers often need to stand on the top of a double ladder to operate. Once they lose their balance, they are very likely to fall off the ladder.

[0005] Such falls not only pose a serious threat to the personal safety of workers, causing varying degrees of physical injury and affecting their health and quality of life, but also delay the construction period, increase medical costs, and thus affect the entire project. Summary of the Invention

[0006] To address the issue that double-leg ladders cannot provide balance for workers constructing at heights and ensure their safety, a construction double-leg ladder and its erection method are provided.

[0007] The technical solution of the present invention is achieved through the following scheme: a double-leg ladder for construction, comprising a ladder frame, a seat plate and a support frame, wherein the ladder frame is rotatably mounted on the seat plate, and the support frame is rotatably mounted on the outer side of the ladder frame, wherein a support block is provided inside the ladder frame, and a support rod is provided inside the support frame, so that the support frame is fixed on the support block after rotation; The end of the support frame is rotatably mounted with an anti-slip base via a base steering drive.

[0008] The above technical solutions, using a support frame and anti-slip base, provide a reference point for workers to lean on during construction, ensuring their safety. The support frame, supporting the roof, has high load-bearing capacity, ensuring the ladder remains safely supported regardless of the worker's position during roof construction. The angle of the support frame can be adjusted for easier and more comfortable operation, improving convenience and efficiency. The support rods and blocks, along with the support bars, allow for quick and easy fixing of the support frame in the desired position, eliminating complicated procedures and saving preparation time.

[0009] Preferably, the ladder frame includes two opposing support ladder bodies and a storage support plate. The support ladder bodies are rotatably mounted on the seat plate via a first hinge. The storage support plates protrude from both side walls of the support ladder bodies. The side wall of the support ladder bodies near the storage support plates has a support rod groove. The support rod support block is rotatably mounted inside the storage support plate via a support block return drive component.

[0010] Preferably, the support frame includes two support bodies arranged opposite to each other. The ends of the support bodies are rotatably mounted on the ladder frame via a second hinge. The inner side of the support body has a support rod storage groove arranged opposite to each other. The anti-slip base is rotatably mounted on the other end of the support body via a third hinge. The support body has a steering drive storage groove. The base steering drive component is located in the steering drive storage groove and connected to the third hinge.

[0011] Preferably, one end of the support rod is rotatably installed in the support rod storage groove via a fourth hinge, and the other end of the support rod is rotatably installed with a support foot. One side of the support foot is slidably installed in the support rod groove via a limiting slider. A stop limiting toe protrudes from the support foot and abuts against the support rod support block.

[0012] Preferably, the storage support plate has a through groove adapted to the support block return drive and the support rod support block. The support block return drive includes a toe block drive wire, a wire winding roller, a roller shaft extension rod, and a first lever. The wire winding roller is rotatably installed inside the storage support plate. The roller shaft extension rod passes through the storage support plate. The first lever is connected to the wire winding roller through the roller shaft extension rod to drive the wire winding roller to rotate. The toe block drive wire is fixed at one end inside the wire winding roller. The support rod support block is connected to the wire winding roller through the toe block drive wire.

[0013] Preferably, the strut support block includes a plurality of pawl toe blocks and an angle limiting block. The plurality of pawl toe blocks are rotatably disposed on one side of the storage support plate near the strut slide groove via a toe block connecting shaft. An angle limiting block is provided on both sides of the pawl toe blocks, and a return spring is wound on the toe block connecting shaft.

[0014] Preferably, the base steering drive includes a synchronous take-up and release roller, a second lever, a reverse drive wire, and a forward drive wire. The synchronous take-up and release roller is connected to the second lever via a drive extension shaft. The synchronous take-up and release roller is connected to a third hinge via the reverse drive wire and the forward drive wire. A first tension spring is connected to the reverse drive wire, and a second tension spring is connected to the forward drive wire.

[0015] The specific steps for erecting the construction ladder are as follows: Step A: Open the ladder frame so that the ladder frame and seat board form a triangular support, creating a double-leg ladder; Step B: Rotate the support frame to support the roof surface; Step C: Adjust the base steering drive to adjust the angle of the anti-slip base so that it fits the roof surface; Step D: Adjust the support block return drive to reset the support frame; Step E: Simply rotate in the opposite direction to complete the storage.

[0016] As a preferred option, the specific steps of step B include: b1, the support frame rotates around the ladder frame, and the support rod hinged inside the support rod storage slot slides out and slides upward; b2, at this time, the side of the support foot of the support rod slides against the support rod groove on the side of the support ladder, while the stop limit toe at the end of the support foot slides against the side wall of the storage support plate. b3, the stop limit toe pushes the pawl toe block, causing the pawl toe block to rotate into the storage support plate, so as not to obstruct the sliding of the support foot; b4. Once the support frame is moved to the required position, it loses the human-driven thrust, and the support rod and the rebounded pawl toe block form a support, fixing the support frame and completing the support for the roof surface.

[0017] Preferably, in step D, the rotating support block return drive causes the pawl toe blocks of the support block to rotate and rotate into the storage support plate. When all the pawl toe blocks retract into the storage support plate, the support rod will lose support and slide downward. At this time, the support frame can be rotated and reset.

[0018] In summary, the present invention has the following beneficial effects: 1. This invention provides a support frame in conjunction with an anti-slip base, offering a reference point for workers to lean on or use during construction, ensuring their safety. The support frame, supported by the roof, boasts high load-bearing capacity, ensuring the ladder remains safely supported regardless of the worker's position during roof construction. The angle of the support frame is adjustable, facilitating more convenient and comfortable operation and improving efficiency. The support rod and support block, along with the support rod, allow for quick and easy fixing of the support frame in the desired position, eliminating complicated procedures and saving preparation time.

[0019] 2. The support block return drive can provide a stable support reference for the support rod of the support frame. The support block return drive can quickly manipulate the support block of the support rod, thereby releasing the support of the support frame, so that the support frame can be lowered quickly when needed.

[0020] 3. The support rods can be easily stored in the support rod storage slot, which not only makes the support frame structure neater, but also, in conjunction with the support rod sliding groove during storage and unfolding, allows workers to clearly see the position of the support rods, making operation more convenient and quick. This avoids the chaos and inconvenience caused by not having a place to put the support rods. The anti-slip base is used to support and protect the bottom of the ladder. At the same time, when using the ladder for roof construction, the anti-slip base can be made to fit against the roof to increase the strength of the support frame's fit against the roof, prevent the ladder from slipping, and enhance the safety of using the ladder.

[0021] 4. The support feet fit tightly against the support block of the strut, while the limiting slider slides within the strut groove, providing additional constraints to the entire support structure. This effectively prevents the support rod from swaying and shifting, thus providing a more stable and reliable support for the ladder and greatly reducing the risk of the ladder tipping over during construction.

[0022] 5. The first lever easily drives the wire winding roller to rotate, and the toe block drives the wire to move together to store the support block of the strut. This allows workers to quickly and easily control the return action of the support block on the construction site. The support block return drive makes full use of the space of the storage plate and is cleverly installed inside the storage plate, making the entire ladder frame structure more compact and reducing structural redundancy.

[0023] 6. The rotation angle range of the pawl toe block is limited by the angle limiting block to prevent the pawl toe block from rotating excessively and losing its supporting function. The support rod works in conjunction with the return spring. During the upward sliding of the support rod, the pawl toe block can be compressed by force to avoid obstruction, and rebound to provide support when the force is lost.

[0024] 7. By rotating the synchronous take-up and take-up rollers, the reverse and forward drive wires will move simultaneously to achieve bidirectional transmission, thereby controlling the steering angle of the anti-slip base and preventing the anti-slip base from rotating downwards due to gravity. This improves the stability and ease of operation of the anti-slip base. The tension spring plays a role in buffering and balancing. The tension spring absorbs some energy through its own elastic deformation, reducing the impact on the drive wires and synchronous take-up and take-up rollers, preventing excessive speed, and maintaining stability during the steering process. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the working state structure of the present invention; Figure 3 This is a schematic diagram of the assembly of the supporting ladder and the seat plate of the present invention; Figure 4 This is a schematic diagram of the main assembly structure of the support frame of the present invention; Figure 5 yes Figure 2 A magnified structural diagram at point A; Figure 6 This is a schematic diagram of the assembly structure of the supporting ladder and the storage support plate of the present invention; Figure 7 This is a schematic diagram of the assembly structure of the storage support plate, support foot, support rod support block and support block return drive component of the present invention; Figure 8 yes Figure 7 A cross-sectional view of the storage support plate; Figure 9 This is a schematic diagram of the assembly structure of the strut support block of the present invention; Figure 10 yes Figure 4 Schematic diagram of the unfolded structure; Figure 11 This is a schematic diagram of the internal cross-sectional structure of the support frame of the present invention; Figure 12 This is a cross-sectional view of the steering drive storage groove of the present invention; Figure 13 This is a schematic diagram of the exploded structure of the base steering drive and the anti-slip base of the present invention; Figure 14 This is an exploded view of the end assembly structure of the reverse and forward drive wires of the present invention; Figure 15 This is a schematic diagram of the workflow of the present invention.

[0026] Explanation of reference numerals in the attached drawings: 1. Ladder frame; 11. Supporting ladder body; 12. Support rod groove; 13. Storage support plate; 131. Toe block limiting groove; 132. Hinge rod rotating groove; 133. Angle limiting groove; 134. Spring transmission groove; 135. Drive wire transmission groove; 2. Seat plate; 21. First hinge; 3. Support frame; 31. Support frame body; 32. Second hinge; 33. Support rod storage groove; 34. Anti-slip base; 35. Third hinge; 36. Winding groove; 37. Steel wire slide; 38. Spring slide; 4. Support rod; 41. Fourth hinge; 42. Support foot; 43. Stop and limit toe; 44. Limit slider; 5. Support block; 51. Toe block connecting shaft; 52. Claw toe block; 53. Angle limiting block; 54. Return spring; 50. Support block return drive; 55. Toe block drive wire; 56. Wire winding roller; 57. Roller extension rod; 58. First lever; 6. Base steering drive; 61. Synchronous take-up and untake-up rollers; 62. Drive extension shaft; 63. Second lever; 64. Reverse transmission wire; 641. First tension spring; 65. Forward transmission wire; 651. Second tension spring; 66. First fixing port; 67. Second fixing port; 7. Strap box; 71. Handrail fixing strap; 72. Sealing cover. Detailed Implementation

[0027] To better understand the above-mentioned objectives, features and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein. Therefore, the invention is not limited to the specific embodiments disclosed in the following specification. The invention will be further described in detail below with reference to the accompanying drawings.

[0029] Example 1: A construction ladder, such as Figures 1-14 As shown, the ladder includes a ladder frame 1, a seat plate 2, and a support frame 3. The ladder frame 1 is rotatably mounted on the seat plate 2. The support frame 3 is rotatably mounted on the outer side of the ladder frame 1. The ladder frame 1 has a support block 5 inside, and the support frame 3 has a support rod 4 inside, so that the support frame 3 can be fixed on the support block 5 after rotation. The seat plate 2 is concave in shape. The end of the support frame 3 is rotatably mounted with an anti-slip base 34 through a base steering drive 6. When stored, the anti-slip base 34 is located at the end of the ladder frame 1 away from the seat plate 2 and covers it. The outer side of the anti-slip base 34 has an anti-slip layer. By unfolding the support frame 3, the ladder can be stably supported regardless of whether the worker is standing, squatting, or in other postures, providing a safer working environment for the worker and further reducing the risk of safety accidents caused by ladder instability.

[0030] The seat plate 2, ladder frame 1, and support frame 3 are installed in sequence from the inside out, hinged together.

[0031] like Figure 5 As shown, the support frame 3 is also equipped with a strap box 7. The end face of the strap box 7 is snapped with a sealing cap 72. The strap box 7 contains a support frame fixing strap 71. The strap box 7 is fixedly installed on the outer wall of the support frame 3. When the double ladder is used outdoors and does not have a top support, the anti-slip base 34 can be bound by the support frame fixing strap 71 to fix it to an external building such as a water pipe, which can improve the load-bearing capacity of the double ladder support frame 3 and give the double ladder a high-strength support point when in use. There are two strap boxes 7, which are welded and fixed to one side of the two support frame bodies 31. The support frame fixing strap 71 can also bind the crossbars of the two support ladder bodies 11, so that the two support ladder bodies 11 are connected and unfolded to form an "A" shape to provide stability. It can also bind the crossbars of the support frame body 31.

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 6 As shown, the ladder frame 1 includes two opposing support ladder bodies 11 and a storage support plate 13. The support ladder bodies 11 are rotatably mounted on the seat plate 2 via a first hinge 21. The storage support plates 13 protrude from both side walls of the support ladder bodies 11, providing a physical basis for subsequent storage and auxiliary support. The side wall of the support ladder body 11 near the storage support plate 13 has a support rod groove 12, which guides and limits the movement trajectory of the support rod 4. The support rod support block 5 is rotatably mounted in the storage support plate 13 via a support block return drive 50. The two sets of support ladder bodies 11 are hinged together via the seat plate 2 to form a double-leg ladder, realizing the overall unfolding and folding of the ladder. The two support ladder bodies 11 have the same structure and support... The support frame 3 also has two support frame bodies 31, which are hinged to the support ladder 11 via the second hinge 32. The width from the outer side of the support ladder 11 to the outermost edge of the storage support plate 13 is the same as the width of the support frame body 31, so that the support frame body 31 abuts against the storage support plate 13 when stored, making the stored state more aesthetically pleasing. The second hinge 32 is located on the side wall of the support ladder 11 above the storage support plate 13, about 20-30cm from the top of the storage support plate 13. The high-position hinge design allows the support frame 3 to have a larger range of rotation angles compared to the low-position hinge, thus providing a wider protective surface and more flexible adjustment space when unfolded.

[0033] like Figure 7 , Figure 8As shown, the storage support plate 13 has through slots that are adapted to the support block positioning drive component 50 and the support rod support block 5. The storage support plate 13 has toe block limiting slot 131, hinge rod rotating slot 132, angle limiting slot 133, spring transmission slot 134 and drive wire transmission slot 135. The toe block limiting slot 131 is opened on the surface of the storage support plate 13. The hinge rod rotating slot 132 and the angle limiting slot 133 are coaxial slots. The angle limiting slot 133 is semi-circular and shallow, fitting into the hinge rod rotating slot 132. Through the cooperation of the semi-circular slot wall and the angle limiting block 53, the maximum rotation angle of the component is limited to 90°. The spring transmission slot 134 and the drive wire transmission slot 135 are located inside the storage support plate 13. The drive wire transmission slot 135 extends along the length of the storage support plate 13. The former is a horizontal rectangular slot to accommodate the spring, and the latter is a vertical rectangular slot to pass through the drive wire.

[0034] like Figure 1 , Figure 2 , Figure 4 ,and Figure 11 As shown, the support frame 3 includes two opposing support bodies 31. The ends of the support bodies 31 are rotatably mounted on the ladder frame 1 via a second hinge 32. The inner sides of the support bodies 31 have opposing support rod storage slots 33, which are parallel elongated grooves. The anti-slip base 34 is rotatably mounted on the other end of the support body 31 via a third hinge 35. The support body 31 has a steering drive storage slot, and the base steering drive component 6 is located in the steering drive storage slot and connected to the third hinge 35. The end of the support body 31 near the anti-slip base 34 has two horizontal... The poles and crossbars are wrapped with soft rubber to prevent impact and protect the workers. After the main body of the support frame 31 is unfolded and rotated, the distance between its crossbars and the seat plate 2 is relatively large, so workers can easily pass through the crossbars and directly enter the area of ​​the seat plate 2 for construction. The main body of the support frame 31, its two crossbars and the anti-slip base 34 at its ends are in the shape of an inverted "moon". The two support rods 4 are stored in the support rod storage groove 33. Under the action of gravity, the support rods 4 slide out of the support rod storage groove 33 and unfold along the inner side of the main body of the support frame 31, and finally form a triangular support structure with the storage support plate 13 and the main body of the support frame 31.

[0035] The steering drive storage slot is composed of a winding slot 36, a wire slide 37, and a spring slide 38. The base steering drive component 6 extends within the wire slide 37 and is connected to the third hinge 35. Near the third hinge 35, the part of the wire slide 37 has two spring slides 38 arranged vertically, which are larger than the wire slide 37, to accommodate the first tension spring 641 and the second tension spring 651 of the base steering drive component 6. By applying a driving force to the base steering drive component 6, the anti-slip base 34 is controlled to rotate and adjust the angle. The first lever 58 and the second lever 63 are both exposed on the outer side wall of the feet.

[0036] like Figure 2 , Figure 4 , Figure 7 and Figure 10 As shown, one end of the support rod 4 is rotatably installed in the support rod storage groove 33 via the fourth hinge 41, and the other end of the support rod 4 is rotatably installed with a support foot 42. One side of the support foot 42 is slidably installed in the support rod slide groove 12 via a limiting slider 44. A stop limiting toe 43 protrudes from the support foot 42 and abuts against the support block 5. The support foot 42 is an "L"-shaped cast steel part with a rubber anti-slip pad on the bottom. The vertical side is hinged to the far end of the support rod 4, and the limiting slider 44 is welded to the inner side of the vertical side. The horizontal side protrudes with the stop limiting toe 43, and the surface of the stop limiting toe 43 is knurled. With high friction, when the support rod 4 is extended to the working position, the stop limit toe 43 abuts against the inclined side wall of the support rod support block 5, creating a support point. The limit slider 44 slides in the support rod slide groove 12, which not only restricts the movement trajectory of the support foot 42, but also prevents the support rod 4 from accidentally falling out of the support rod storage groove 33 during use. At the same time, the stop limit toe 43 abuts against the support rod support block 5, further enhancing the connection stability between the support rod 4 and the support rod support block 5, ensuring that the support rod 4 will not loosen or detach when subjected to large external forces, thus ensuring the safety of the construction process.

[0037] like Figure 6 , Figure 7 and Figure 9 As shown, the support block positioning drive component 50 includes a toe block drive wire 55, a wire take-up roller 56, a roller shaft extension rod 57, and a first lever 58. The wire take-up roller 56 is rotatably installed inside the storage support plate 13. The roller shaft extension rod 57 passes through the storage support plate 13. The first lever 58 is connected to the wire take-up roller 56 through the roller shaft extension rod 57 to drive the wire take-up roller 56 to rotate. The toe block drive wire 55 is fixed at one end inside the wire take-up roller 56. The support block 5 is connected to the wire take-up roller through the toe block drive wire 55. A toe block drive wire 55 is slidably threaded through the inner side of the toe block connecting shaft 51 inside the spring transmission groove 134. A wire take-up roller 56 is rotatably connected to the top of the drive wire transmission groove 135. The toe block drive wire 55 is threaded through the center of multiple arrays of toe block connecting shafts 51 arranged in the drive wire transmission groove 135 and is threaded in an inclined direction. Therefore, when the toe block drive wire 55 is straightened, it will apply a rotational force to the toe block connecting shaft 51, causing the toe block connecting shaft 51 to rotate and simultaneously drive all the pawl toe blocks 52 to rotate into the toe block limiting groove 131.

[0038] The strut support block 5 includes several pawl toe blocks 52 and angle limiting blocks 53. The pawl toe blocks 52 are rotatably mounted on one side of the storage support plate 13 near the strut slide groove 12 via toe block connecting shaft 51. Angle limiting blocks 53 are provided on both sides of the pawl toe blocks 52. A return spring 54 is also wound on the toe block connecting shaft 51. One end of the return spring 54 is fixed to the inner wall of the spring transmission groove 134, and the other end of the return spring 54 is fixed to the toe block connecting shaft 51. The pawl toe blocks 52 are generally teardrop-shaped and can rotate in the toe block limiting groove 131. The pointed head extends out of the surface of the storage support plate 13. The toe block limiting groove 131 is not completely straight, but has a certain inclination angle that matches the arc of the head of the pawl toe block 52. This ensures that when the pawl toe block 52 is in the working position, the contact surface between the pointed head of the pawl toe block 52 and the stop limiting toe 43 is horizontal rather than inclined, forming a surface contact support and improving the stability of the support.

[0039] The pawl toe block 52 is normally in the extended state. When subjected to force, it is retracted and rotated into the toe block limiting groove 131. When the force is lost, the elastic force of the return spring 54 acts on the toe block connecting shaft 51, causing it to rotate in the opposite direction and drive the pawl toe block 52 to return to the working state.

[0040] The transmission method using toe block drive wire 55 and wire winding roller 56 has high stability and reliability. The steel wire has high strength and toughness and can withstand large tensile forces. It is not easy to break or deform during transmission. At the same time, the rotation of the wire winding roller 56 can smoothly wind up and unwind the toe block drive wire 55, ensuring that the support block 5 moves smoothly during the return process without jamming or shaking, thus providing stable support for the ladder.

[0041] like Figure 1 , Figure 4 , Figure 11 , Figure 12 , Figure 13 and Figure 14As shown, the base steering drive component 6 includes a synchronous take-up and release roller 61, a second lever 63, a reverse drive wire 64, and a forward drive wire 65. The synchronous take-up and release roller 61 is connected to the second lever 63 via a drive extension shaft 62. The synchronous take-up and release roller 61 is connected to a third hinge 35 via the reverse drive wire 64 and the forward drive wire 65. A first tension spring 641 is connected to the reverse drive wire 64, and a second tension spring 651 is connected to the forward drive wire 65. A first fixing opening 66 is provided on the synchronous take-up and release roller 61 for binding one end of the reverse drive wire 64 and the forward drive wire 65. The other end is tied to the third hinge 35 with the second fixing opening 67. The bottom end of the forward rotation drive wire 65 is wound in the opposite direction around the outer wall of the third hinge 35, and the bottom end of the reverse rotation drive wire 64 is wound in the forward direction around the outer wall of the third hinge 35. The bidirectional drive through reverse and forward rotation controls the rotation of the anti-slip base 34. When the anti-slip base 34 is supported by the roof, the anti-slip surface of the anti-slip base 34 can be controlled to adhere to the roof on the double-leg ladder, preventing the anti-slip base 34 from rotating downwards due to gravity, thus improving the stability and ease of operation of the anti-slip base 34.

[0042] The first tension spring 641 and the second tension spring 651 apply tension to the reverse transmission cable 64 and the forward transmission cable 65 respectively, forming a bidirectional tension balance. This bidirectional tension ensures that the transmission cable is always in a taut state, avoiding steering failure or structural shaking caused by the slack of the transmission cable, and further enhancing the stability of the entire steering drive system.

[0043] The tension of the spring keeps the transmission wire under constant tension, preventing the base from rotating unexpectedly when not in operation. For example, when the ladder is placed on a slope, the tension of the spring can prevent the base from turning automatically due to gravity, ensuring the safety of construction workers.

[0044] Example 2: A method for erecting a construction ladder, such as... Figures 1-15 As shown, it includes the following steps: Step A: Open the ladder frame 1 to allow the ladder frame 1 and the seat plate 2 to form a triangular support, creating a double-leg ladder; When unfolding the double-leg ladder, place the two sets of supporting ladder bodies 11 vertically on the ground, and open the two sets of supporting ladder bodies 11 at the same time, so that the top of the supporting ladder body 11 rotates around the first hinge 21 at the bottom of the seat plate 2 to form a triangular support and thus form a double-leg ladder.

[0045] Step B: Rotate the support bracket 3 to support the roof surface; b1, the support frame 3 rotates around the ladder frame 1, and the support rod 4, which is hinged inside the support rod storage groove 33, slides out and slides upward; b2, at this time, the side of the support foot 42 of the support rod 4 slides against the support rod groove 12 on the side of the support ladder 11, while the stop limit toe 43 at the end of the support foot 42 slides against the side wall of the storage support plate 13. b3, the stop limit toe 43 pushes the pawl toe block 52, causing the pawl toe block 52 to rotate into the storage support plate 13, so as not to obstruct the sliding of the support foot 42. b4. When the support frame 3 moves to the required position, the support frame 3 loses the human driving force, and the support rod 4 and the rebounded pawl toe block 52 form a support, fixing the support frame 3 and completing the support of the roof surface.

[0046] The support frame body 31 can be rotated directly. The second hinge 32 at the top of the support frame body 31 rotates on the outer wall of the support ladder 11. When the support frame body 31 rotates, the fourth hinge 41 hinged inside the support rod storage groove 33 will be affected by the rotation of the support frame body 31, which will drive the support rod 4 to slide upward. When the support rod 4 slides upward, the support foot 42 hinged at the bottom of the support rod 4 will slide inside the support rod slide groove 12 through the limiting slider 44. At the same time, since the limiting slider 44 slides inside the support rod slide groove 12, the stop limiting toe 43 on the side of the support foot 42 and the support rod support block 5 on the storage support plate 13 form a stable support.

[0047] When the support foot 42 and the stop block limiting toe 43 slide against the side wall of the storage support plate 13, the side of the support foot 42 and the stop block limiting toe 43 will push the pawl toe block 52 extending to the outside of the storage support plate 13, so that the pawl toe block 52 rotates into the toe block limiting groove 131 and does not obstruct the sliding of the support foot 42.

[0048] When the pawl toe block 52 rotates, the toe block connecting shaft 51 connected to the center of the pawl toe block 52 will rotate synchronously with its rotation. The rotation of the toe block connecting shaft 51 will simultaneously drive the angle limit block 53 and the return spring 54 to rotate.

[0049] The angle limiting block 53 will rotate inside the angle limiting groove 133. Due to the limiting obstruction of the angle limiting groove 133, the angle limiting block 53 can only rotate 90°, while the pawl toe block 52 is completely stored inside the toe block limiting groove 131 at this time.

[0050] When the return spring 54 rotates, it will cause the spring to contract and accumulate a reverse rebound force. When the support foot 42 and the stop limit toe 43 slide to the upper part of the contracted pawl toe block 52, the pawl toe block 52 loses its thrust and pressure. The toe block connecting shaft 51 will be driven by the elastic force accumulated by the return spring 54 to rotate in the opposite direction. At this time, the pawl toe block 52 will rotate outward of the toe block limit groove 131, allowing the pawl toe block 52 to rotate to the initial working position.

[0051] When the support frame body 31 moves to the required position, the support frame body 31 loses the human driving force and will be subjected to its own weight to exert pressure on the downward side, transmitting the pressure to the position of the support rod 4. The support rod 4 will be driven by the pressure to slide its bottom end against the side wall of the storage support plate 13. At this time, since the support foot 42 and the stop block limiting toe 43 have pushed the retracted pawl toe block 52 to receive the elastic force to reset, the pawl toe block 52 will abut against the sliding stop block limiting toe 43. Since the side of the support foot 42 limits the position of the support foot 42 through the limiting slider 44, the stop block limiting toe 43 will form a stable support with the pawl toe block 52, supporting the sliding support rod 4 and the support frame body 31 above the ladder frame 1.

[0052] Step C: Adjust the base steering drive 6 to adjust the angle of the anti-slip base 34 to fit the roof surface; When the anti-slip base 34 at the bottom of the support frame 3 is used to support the roof surface, the orientation angle of the anti-slip base 34 can be adjusted by rotating the second lever 63 on both sides of the outer wall of the support frame 3 to drive the extension shaft 62 to rotate. The synchronous take-up and release roller 61 connected to the extension shaft 62 rotates, which drives the reverse transmission wire 64 and the forward transmission wire 65 connected to its outer wall to rotate. This causes the other end of the reverse transmission wire 64 and the forward transmission wire 65 to drive the third hinge 35 connected to the anti-slip base 34 to rotate, thereby realizing the rotation direction control of the anti-slip base 34. This allows the anti-slip surface of the anti-slip base 34 to fit against the roof surface when the support frame 3 is supporting the roof surface, improving the support stability of the anti-slip base 34.

[0053] During the sliding of the forward and reverse drive wires, the first tension spring 641 and the second tension spring 651 will be driven to slide simultaneously. The first tension spring 641 and the second tension spring 651 can prevent the anti-slip base 34 from directly driving the synchronous take-up and take-up roller 61 to rotate synchronously when subjected to high-intensity rotational driving force, thereby improving the safety of the synchronous take-up and take-up roller 61 during use and avoiding the anti-slip base 34 from being subjected to high-speed rotation and thus applying a high-speed rotational impact force to the operator using the second lever 63.

[0054] Step D: Adjust the support block return drive component 50 to reset the support frame; Rotate the support block return drive 50, which drives the pawl toe block 52 of the support block 5 to rotate and rotate into the storage support plate 13. When all the pawl toe blocks 52 retract into the storage support plate 13, the support rod 4 will lose support and slide downward. At this time, the support frame can be rotated and reset.

[0055] When the support frame 3 is ready to be stored, stand on the outside of the ladder frame 1 or its crossbar and rotate the first lever 58 on the outer wall of the ladder frame 1. When the first lever 58 rotates, it will drive the roller extension rod 57 to rotate. The rotation of the roller extension rod 57 will drive the wire winding roller 56 connected to it to rotate. The rotation of the wire winding roller 56 will wind up the toe block drive wire 55 connected to its outer wall, thereby driving the pawl toe block 52 to retract and rotate inward. At this time, the support frame 3 is not under the pressure of the operator or other construction tools, and only its own weight will press on the pawl toe block 52. At this time, the rotation force applied by the worker can easily overcome the weight of the support frame 3 itself.

[0056] When all the pawl teeth retract into the toe block limiting groove 131, the stop block limiting toe 43 will lose support and slide downward. At this time, the operator supports the support frame 3 with the other hand to make it slowly turn back. When standing on the horizontal bar of the ladder frame 1, the operator will descend from the horizontal bar of the ladder frame 1 in sync with the turning of the support frame 3 until standing on the ground.

[0057] Step E: Simply rotate in the opposite direction to complete the storage.

[0058] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments that can be applied to other fields. However, any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A construction ladder with two legs, characterized in that: It includes a ladder frame (1), a seat plate (2) and a support frame (3). The ladder frame (1) is rotatably mounted on the seat plate (2). The support frame (3) is rotatably mounted on the outer side of the ladder frame (1). The ladder frame (1) is provided with a support block (5). The support frame (3) is provided with a support rod (4) so ​​that the support frame (3) can be fixed on the support block (5) after rotation. The end of the support frame (3) is rotatably mounted with an anti-slip base (34) via a base steering drive (6).

2. The construction ladder according to claim 1, characterized in that: The ladder frame (1) includes two opposing support ladder bodies (11) and a storage support plate (13). The support ladder bodies (11) are rotatably mounted on the seat plate (2) via a first hinge (21). The storage support plate (13) protrudes from both sides of the support ladder bodies (11). The support ladder bodies (11) have a support rod groove (12) on the side wall near the storage support plate (13). The support rod support block (5) is rotatably mounted in the storage support plate (13) via a support block return drive (50).

3. The construction ladder according to claim 2, characterized in that: The support frame (3) includes two support bodies (31) arranged opposite to each other. The ends of the support bodies (31) are rotatably mounted on the ladder frame (1) via the second hinge (32). The inner side of the support body (31) has a support rod storage groove (33) arranged opposite to each other. The anti-slip base (34) is rotatably mounted on the other end of the support body (31) via the third hinge (35). The support body (31) has a steering drive storage groove. The base steering drive component (6) is located in the steering drive storage groove and connected to the third hinge (35).

4. A construction ladder according to claim 3, characterized in that: One end of the support rod (4) is rotatably installed in the support rod storage groove (33) via the fourth hinge (41), and the other end of the support rod (4) is rotatably installed with a support foot (42). One side of the support foot (42) is slidably installed in the support rod slide groove (12) via a limiting slider (44). A stop limiting toe (43) protrudes from the support foot (42), and the stop limiting toe (43) abuts against the support rod support block (5).

5. A construction ladder according to claim 4, characterized in that: The storage support plate (13) has through slots that are adapted to the support block return drive (50) and the support rod support block (5). The support block return drive (50) includes a toe block drive wire (55), a wire winding roller (56), a roller shaft extension rod (57), and a first lever (58). The wire winding roller (56) is rotatably installed inside the storage support plate (13). The roller shaft extension rod (57) passes through the storage support plate (13). The first lever (58) is connected to the wire winding roller (56) through the roller shaft extension rod (57) to drive the wire winding roller (56) to rotate. The toe block drive wire (55) is fixed at one end inside the wire winding roller (56). The support rod support block (5) is connected to the wire winding roller through the toe block drive wire (55).

6. A construction ladder according to claim 5, characterized in that: The strut support block (5) includes several pawl toe blocks (52) and angle limiting blocks (53). Several pawl toe blocks (52) are rotatably mounted on one side of the storage support plate (13) near the strut slide groove (12) via toe block connecting shaft (51). Angle limiting blocks (53) are provided on both sides of the pawl toe blocks (52). A return spring (54) is also wound on the toe block connecting shaft (51).

7. A construction ladder according to claim 6, characterized in that: The base steering drive (6) includes a synchronous take-up and release roller (61), a second lever (63), a reverse transmission wire (64), and a forward transmission wire (65). The synchronous take-up and release roller (61) is connected to the second lever (63) via a drive extension shaft (62). The synchronous take-up and release roller (61) is connected to a third hinge (35) via the reverse transmission wire (64) and the forward transmission wire (65). A first tension spring (641) is connected to the reverse transmission wire (64), and a second tension spring (651) is connected to the forward transmission wire (65).

8. A method for erecting a construction ladder, characterized in that, The erection of the construction ladder as described in claim 7 includes the following steps: Step A: Open the ladder frame (1) so that the ladder frame (1) and the seat plate (2) can form a triangular support to form a double-leg ladder; Step B: Rotate the support frame (3) to support the roof surface; Step C: Adjust the base steering drive (6) to adjust the angle of the anti-slip base (34) to fit the roof surface; Step D: Adjust the support block return drive (50) to reset the support frame; Step E: Simply rotate in the opposite direction to complete the storage.

9. The method for erecting a construction ladder according to claim 8, characterized in that: The specific steps for step B include: b1, the support frame (3) rotates around the ladder frame (1), and the support rod (4) hinged inside the support rod storage groove (33) slides out and slides upward; b2, at this time the side of the support foot (42) of the support rod (4) slides against the support rod groove (12) on the side of the support ladder (11), while the stop limit toe (43) at the end of the support foot (42) slides against the side wall of the storage support plate (13). b3, the stop limit toe (43) pushes the pawl toe block (52) so that the pawl toe block (52) rotates into the storage support plate (13) and does not obstruct the sliding of the support foot (42); b4. When the support frame (3) moves to the required position, the support frame (3) loses the human driving force, and the support rod (4) and the rebounded pawl toe block (52) form a support, fixing the support frame (3) and completing the support of the roof surface.

10. The method for erecting a construction ladder according to claim 8, characterized in that: In step D, the rotating support block return drive (50) drives the pawl toe block (52) of the support rod support block (5) to rotate and rotate into the storage support plate (13). When all the pawl toe blocks (52) retract into the storage support plate (13), the support rod (4) will lose support and slide downward. At this time, the support frame can be rotated and reset.

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