Protective ladder for construction of box-shaped steel column

Abstract

The utility model relates to a kind of protective cat ladder for box type steel column construction, including cat ladder body, cat ladder body is connected extension column in the upper end of two columns, two extension columns are equipped with cavity along length direction inside, the side of two columns mutually facing each other is respectively equipped with battery, the back of two columns is equipped with the vertical sliding slot with cavity intercommunication, and in vertical sliding slot, coverable limit frame that is connected with nut mechanism of lead screw and can be set in the top of box type steel column is connected, limit frame includes the support plate and two interval parallelly arranged and inverted U-shaped clamping plate respectively with extension column vertical, two clamping plates are respectively erected on two support plates and the inner wall of clamping plate and support plate outer wall are welded fixed, and the U-shaped lower end between two clamping plates and the U-shaped both ends between each clamping plate are connected with limit rod.The utility model can improve the stability of cat ladder use, and can effectively improve the protection effect, effectively reduce the risk of falling.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, specifically to a protective ladder for the construction of box-type steel columns. Background Technology

[0002] Steel ladders are safety protection devices used for high-altitude operations during steel column hoisting in steel structure construction. Existing steel ladders mostly use double-link tie rods or hooks, which have poor lateral protection and pose a risk of falling off, resulting in poor ladder stability.

[0003] In addition, the ladders currently in use lack adequate safety protection measures, and users are prone to falling due to mistakes or slips, posing a safety risk. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a protective ladder for the construction of box-type steel columns. A liftable limit frame is installed on top of the steel column to limit the ladder's stability. In conjunction with a safety rope, the risk of falls is reduced, and the safety of use is improved.

[0005] This utility model is achieved through the following technical solution:

[0006] A protective ladder for the construction of box-type steel columns is provided, including a ladder body. The ladder body has extension columns connected to the upper ends of two upright columns. The two extension columns have cavities along their length. Batteries are installed on the opposite sides of the two upright columns. Vertical grooves communicating with the cavities are opened on the back of the two upright columns. Limiting frames that can be covered on the top of the box-type steel column are connected in the vertical grooves through a screw and nut mechanism. The limiting frames include support plates perpendicular to the extension columns and two inverted U-shaped clamping plates arranged parallel to each other. The two clamping plates are respectively mounted on the two support plates and the inner walls of the clamping plates are welded and fixed to the outer walls of the support plates. Limiting rods are connected between the lower ends of the U-shape of the two clamping plates and between the two ends of the U-shape of each clamping plate.

[0007] This solution designs a limiting frame, which is positioned at the top of the box-shaped steel column, greatly reducing the risk of the steel ladder falling off in abnormal situations. The height of the limiting frame can be adjusted using a screw and nut mechanism, making it suitable for use with box-shaped steel columns of different heights, improving ease of use, and effectively enhancing the stability and safety of the ladder itself.

[0008] Furthermore, the lead screw and nut mechanism includes a lead screw, a lifting motor, and a lifting block. The two ends of the lead screw are rotatably mounted in the inner cavity of the extension column via bearings. Each lead screw is threaded with a nut. The lifting motor is vertically mounted on the upper end of the column and is electrically connected to the battery. The motor shaft of the lifting motor extends downward into the cavity and is connected to the upper end of the lead screw for transmission. The lifting block is slidably disposed in a vertical groove. One end of the lifting block is connected to the nut, and the other end of the lifting block extends out of the vertical groove and is connected to the support plate.

[0009] The lead screw is driven to rotate by a lifting motor. The nut on the lead screw is rotated and limited by the lifting block and the sliding groove. This allows the nut to move up and down along the length of the lead screw, thereby driving the support plate and the limit frame to move up and down. This can be easily adjusted according to the height of the steel column to stabilize the ladder body.

[0010] Furthermore, the front of the ladder body has an arc-shaped upper protective plate and a lower protective plate connected between the upper and lower parts of the two columns, respectively, and several protective vertical plates are vertically connected between the upper and lower protective plates.

[0011] The ladder body has several protective vertical plates set between the upper and lower protective plates to form a protective cage on the front, which is used to ensure the safety of users and can play a protective role in the event of a fall, thereby improving the safety of use.

[0012] Furthermore, both columns have guide grooves with a U-shaped cross-section on their front sides along their length. Each guide groove has a positioning groove on its inner wall along its length, and a positioning plate is fixed inside the positioning groove. The positioning plate has limit grooves with a right-angled trapezoidal cross-section evenly distributed along its length. Each guide groove has a sliding block with a convex cross-section that is slidably connected to it. Two connecting rings for connecting safety ropes are fixed to the outside of the guide grooves of the two sliding blocks. The inner side of the two sliding blocks facing the positioning plate has a fixing groove in a direction perpendicular to the positioning plate and away from the positioning plate. A limit block matching the shape of the limit groove is connected to the fixing groove by a spring.

[0013] By opening guide grooves on the front of the two pillars and sliding blocks are slidably installed in the guide grooves, the limiting blocks inside the sliding blocks, which are subject to elastic force, can be inserted and cooperate with the limiting grooves on the positioning plates inside the guide grooves. In the event of a fall, the position of the safety rope can be effectively locked to prevent people from falling. At the same time, it does not affect the synchronous movement of the safety rope with the person when they are climbing upwards, making it convenient to use.

[0014] Furthermore, each of the two sliding blocks has a groove on its opposite side that communicates with the fixed groove, and a lever is installed in each groove. The two ends of the lever are perpendicularly connected to the limiting block.

[0015] By creating a slot on the side of the sliding block and connecting the two limit blocks with a lever, the limit block can be separated from the limit slot when the position of the safety rope needs to be adjusted, making it easy to release the limit lock and allowing for flexible use by personnel.

[0016] The beneficial effects of this utility model are:

[0017] This invention utilizes an adjustable limiting frame that is mounted on top of a box-shaped steel column, acting like a hat over the column head. This effectively improves the stability of the ladder and reduces the risk of it falling in abnormal situations. Movable connecting rings are installed on the two uprights at the front of the ladder, working in conjunction with a safety rope to secure it to the user. During climbing, the connecting rings and safety rope move with the user. In the event of a fall, the limiting block and limiting groove work together to lock the sliding block, ensuring the force of the safety rope on the user. This limits the fall, reduces the risk of falling, and effectively improves safety. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model.

[0019] Figure 2 This is a schematic diagram of the back structure of the ladder body in Embodiment 1 of this utility model.

[0020] Figure 3 for Figure 1 Front view of the middle limit frame.

[0021] Figure 4 This is a front view of the ladder body in Embodiment 2 of this utility model.

[0022] Figure 5 for Figure 4 Enlarged diagram of point A in the middle.

[0023] Figure 6 This is a cross-sectional schematic diagram of the ladder body in Example 2.

[0024] Figure 7 This is a schematic diagram of the installation structure of the connecting ring in this utility model.

[0025] As shown in the figure:

[0026] 1. Ladder body; 2. Upright column; 3. Extension column; 4. Cavity; 5. Battery; 6. Vertical slide rail; 7. Lead screw; 8. Lifting block; 9. Upper guard plate; 10. Lower guard plate; 11. Guarding upright plate; 12. Lifting motor; 13. Support rod; 14. Clamping plate; 15. Limiting rod; 16. Limiting groove; 17. Guide groove; 18. Safety rope; 19. Sliding block; 20. Connecting ring; 21. Positioning plate; 22. Lever; 23. Positioning groove; 24. Limiting block; 25. Fixing groove; 26. Spring. Detailed Implementation

[0027] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to describe the solution.

[0028] A protective ladder for the construction of box-type steel columns includes a ladder body 1. The ladder body 1 has extension columns 3 connected to the upper ends of two upright columns 2. The two extension columns 3 have cavities 4 along their length. Batteries 5 are installed on the opposite sides of the two upright columns 3. The back of each of the two upright columns 3 has a vertical groove 6 communicating with the cavity 4. A limiting frame that can be covered on the top of the box-type steel column is connected in the vertical groove 6 through a screw and nut mechanism. The limiting frame includes support plates 13 perpendicular to the extension columns 3 and two parallel and inverted U-shaped clamping plates 14. The two clamping plates 14 are respectively mounted on the two support plates 13 and the inner wall of the clamping plates 14 is welded and fixed to the outer wall of the support plates 13. Limiting rods 15 are connected between the lower U-shaped ends of the two clamping plates 14 and between the two U-shaped ends of each clamping plate 14. To ensure stability, limiting rods 15 are also connected between the two support plates 13.

[0029] The lead screw and nut mechanism includes a lead screw 7, a lifting motor 12, and a lifting block 8. The two ends of the lead screw are rotatably mounted in the inner cavity 4 of the extension column 3 via bearings. Each lead screw 7 is threaded with a nut. The lifting motor 12 is vertically mounted on the upper end of the column 3 and is electrically connected to the battery 5. The motor shaft of the lifting motor 12 extends downward into the cavity 4 and is connected to the upper end of the lead screw 7 for transmission. The lifting block 8 is slidably disposed in the vertical slide groove 6. One end of the lifting block 8 is connected to the nut, and the other end of the lifting block 8 extends out of the vertical slide groove 6 and is connected to the support plate 13.

[0030] To enhance safety, the front of the ladder body 1 is connected to an arc-shaped upper protective plate 9 and a lower protective plate 10 between the upper and lower parts of the two uprights 3, respectively. Several protective uprights 11 are vertically connected between the upper protective plate 9 and the lower protective plate 10.

[0031] The working process of this embodiment:

[0032] When the ladder is needed, the ladder body 1 is placed vertically on one side of the box-shaped steel column. By controlling the forward and reverse rotation of the lifting motor 12, the lifting motor 12 drives the lead screw 7 to rotate. When the lead screw 7 rotates, the nut, under the limiting action of the lifting block 8 and the vertical slide 6, can drive the lifting block 8 to move up and down along the length of the lead screw 7. This can then drive the limiting frame to adjust its height, raising it to the top of the box-shaped steel column. After adjusting the ladder position, the lifting motor 12 is reversed, causing the limiting frame to descend and cover the top of the box-shaped steel column. This ensures that the ladder body 1 maintains high stability, effectively improving the stability of the ladder and reducing the risk of fall when people climb it. Combined with the protective cage formed by the upper protective plate 9, lower protective plate 10, and protective upright plate 11 on the front of the column 3, the risk of fall can be further reduced. In this embodiment, to facilitate the control of the forward and reverse rotation of the lifting motor 12, the two lifting motors 12 can be linked together, and the switch for controlling the forward and reverse rotation can be placed at the lower end of the column 3 on one side of the ladder body 1 for easy operation.

[0033] Example 2:

[0034] Based on Example 1, this embodiment adds a safety rope 18. Specifically, the front of each of the two columns 3 is provided with a guide groove 17 with a U-shaped cross section along the length direction. The inner wall of each guide groove 17 is provided with a positioning groove 23 along the length direction, and a positioning plate 21 is fixed in the positioning groove 23. The positioning plate 21 is provided with a limiting groove 16 with a right trapezoidal cross section evenly along the length direction. Each guide groove 17 is slidably connected with a sliding block 19 with a convex cross section. The two sliding blocks 19 are fixed with a connecting ring 20 for connecting the safety rope 18 outside the guide groove 17. The inner side of each sliding block 19 facing the positioning plate 21 is provided with a fixing groove 25 in a direction perpendicular to the positioning plate 21 and away from the positioning plate 21. The fixing groove 25 is connected with a limiting block 24 that matches the shape of the limiting groove 16 by a spring 26.

[0035] Both sliding blocks 19 have slots on their opposite sides that communicate with the fixed slots 25. Each slot contains a lever 22, and both ends of the lever 22 are perpendicularly connected to the limiting block 24.

[0036] The usage process of this embodiment:

[0037] By creating a guide groove 17 on the front of the column 3 and configuring a sliding block 19, with a connecting ring 20 on the outside of the guide groove 17 for connecting a safety rope 18, the sliding block 19 can be connected to the user's body. When the user climbs upwards, the sliding block 19 slides within the guide groove 17, and its side limiting block 24 abuts against the limiting groove 16. Since the upper contact surface of both is inclined, ... Figure 7As shown, during the upward sliding process of the sliding block 19, the limiting block 24 and the limiting groove 16 can move freely without obstruction. That is, the limiting block 24 moves back and forth in the fixed groove 25 and engages with the limiting groove 16 on the positioning plate 21, so that the safety rope 18 can move upward synchronously with the user. In the event of a fall accident, when the person falls downward, the limiting block 24 and the limiting groove 16 engage and do not separate, so that the sliding block 19 is locked in the guide groove 17 and does not slide, thereby fixing the safety rope 18, thus providing safety protection for the falling user and preventing falls. When the user is climbing down, the lever 22 can be moved to pull the limiting block 24 out of the limiting groove 16. This prevents the limiting block 24 from being inserted into the limiting groove 16 and affecting the sliding block's movement in the guide groove 17. This allows for a smooth descent after the work is completed. Additionally, the lever 22 can be moved during the work to adjust the position of the connecting ring 20 and the safety rope 18 as needed, making the work more convenient.

[0038] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A protective ladder for the construction of box-type steel columns, comprising a ladder body, characterized in that: The ladder body has extension columns connected to the upper ends of the two uprights. The two extension columns have cavities along their length. Batteries are installed on the opposite sides of the two uprights. The back of the two uprights has vertical grooves that communicate with the cavities. A limiting frame that can be covered on the top of the box-shaped steel column is connected in the vertical grooves through a screw and nut mechanism. The limiting frame includes support plates that are perpendicular to the extension columns and two parallel and inverted U-shaped clamping plates. The two clamping plates are respectively mounted on the two support plates and the inner walls of the clamping plates are welded to the outer walls of the support plates. Limiting rods are connected between the lower ends of the U-shape of the two clamping plates and between the two ends of the U-shape of each clamping plate.

2. The protective ladder for construction of box-type steel columns according to claim 1, characterized in that: The lead screw and nut mechanism includes a lead screw, a lifting motor, and a lifting block. The two ends of the lead screw are rotatably mounted in the inner cavity of the extension column via bearings. Each lead screw is threaded with a nut. The lifting motor is vertically mounted on the upper end of the column and is electrically connected to the battery. The motor shaft of the lifting motor extends downward into the cavity and is connected to the upper end of the lead screw for transmission. The lifting block is slidably disposed in a vertical slide groove. One end of the lifting block is connected to the nut, and the other end of the lifting block extends out of the vertical slide groove and is connected to the support plate.

3. The protective ladder for construction of box-type steel columns according to claim 1, characterized in that: The front of the ladder body has an arc-shaped upper protective plate and a lower protective plate connected between the upper and lower parts of the two columns, respectively. Several protective vertical plates are vertically connected between the upper and lower protective plates.

4. The protective ladder for construction of box-type steel columns according to claim 1, characterized in that: Both columns have guide grooves with a U-shaped cross-section along their length on their front sides. Each guide groove has a positioning groove along its length on its inner wall, and a positioning plate is fixed inside the positioning groove. The positioning plate has limit grooves with a right-angled trapezoidal cross-section evenly distributed along its length. Each guide groove has a sliding block with a convex cross-section that is slidably connected to it. Two connecting rings for connecting safety ropes are fixed to the outside of the guide grooves of the two sliding blocks. The inner side of the two sliding blocks facing the positioning plate has a fixing groove in a direction perpendicular to the positioning plate and away from the positioning plate. A limit block matching the shape of the limit groove is connected to the fixing groove by a spring.

5. The protective ladder for construction of box-type steel columns according to claim 4, characterized in that: Each of the two sliding blocks has a groove on its opposite side that communicates with the fixed groove. A lever is installed in each groove, and the two ends of the lever are perpendicularly connected to the limiting block.

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