Double-layer beam storage portable climbing-up and climbing-down safety ladder for railway box beams

Abstract

The utility model relates to the technical field of crawling ladders, in particular to a portable climbing-up and climbing-down safety ladder for double-layer girder storage of railway box girders, which is provided with a moving auxiliary component, when a crawling ladder base is moved, a screw rod is rotated to drive a linkage part and a roller bracket to move downwards through threaded connection with the crawling ladder base, so that the climbing-up and climbing-down safety ladder is realized. The roller supports moving downwards are matched with the displacement rollers to jack up one side of the crawling ladder base, the displacement rollers on the other side are subjected to the same operation, so that the displacement rollers on the other side jack up the other side of the crawling ladder base in a matched mode, and the setting position of the crawling ladder base can be adjusted in a mode of pushing the crawling ladder base after jacking up. The position of the adjustable crawling ladder can be conveniently adjusted in a pushing mode, and meanwhile, when the position is adjusted, the movable crawling ladder base can be used for supporting the adjustable crawling ladder.

Description

Technical Field

[0001] This utility model relates to the field of ladder technology, specifically to a portable safety ladder for storing double-layer railway box girders. Background Technology

[0002] In the actual operation of railway box girder prefabrication yards, there are often situations where the girder is stored in two layers. At this time, the maintenance, inspection and related construction operations of the stored girder are essential. However, the existing traditional ladders have certain drawbacks when dealing with such scenarios.

[0003] Traditional ladders need to be moved repeatedly during use to facilitate switching between different box girders. In the relatively narrow and complex double-layer girder storage area, operators need to spend a lot of physical strength to move the ladder, which not only reduces work efficiency but also increases the labor intensity of the staff. To address this, a portable safety ladder for double-layer girder storage on railways has been proposed. Utility Model Content

[0004] In order to solve the technical problems existing in the prior art, this utility model provides a portable safety ladder for double-layer storage of railway box girders.

[0005] To solve the above technical problems, this utility model provides the following technical solution: a portable safety ladder for storing double-layer railway box girders, including a ladder base and an adjustable ladder. The adjustable ladder is installed in the middle of the ladder base via a pivot. A set of moving auxiliary components is installed on both sides of the ladder base. The moving auxiliary components include a roller bracket, a linkage, a displacement roller, and a screw.

[0006] The roller bracket is located on the outside of the side of the ladder base, the linkage is formed in the middle of the roller bracket, the two sets of displacement rollers are respectively installed at both ends of the roller bracket, the screw is connected to the middle of the linkage, and the bottom end of the screw is threaded to the ladder base.

[0007] Preferably, the mobility aid further includes a pressure spring, which is sleeved on the lower part of the screw, and the two ends of the pressure spring abut against the surfaces of the ladder base and the linkage part, respectively.

[0008] Preferably, the moving auxiliary component further includes auxiliary limiting rods, with two sets of auxiliary limiting rods respectively disposed on both sides of the linkage part, and the bottom ends of both sets of linkage parts being connected to the ladder base. The linkage part can drive the roller bracket to slide relative to the ladder base.

[0009] Preferably, the displacement rollers are fitted to the ends of the ladder base under the constraint of the roller brackets, and the displacement rollers are arranged at an angle.

[0010] Preferably, the adjustable ladder includes a lower fixed part, a movable ladder, and a limiting bolt. The lower fixed part is installed in the middle of the ladder base via a pivot. The movable ladder is sleeved inside the lower fixed part. The limiting bolt is installed on the side wall of the lower fixed part. The height of the movable ladder relative to the lower fixed part is limited by the limiting bolt.

[0011] Preferably, the side wall of the movable ladder is provided with several sets of screw holes for connecting the limiting bolts, and the several sets of screw holes are arranged at equal intervals on the side wall of the lower fixed part.

[0012] Preferably, the adjustable ladder is equipped with an auxiliary ladder inside. The auxiliary ladder includes a linkage rope and a linkage ladder plate. Two sets of linkage ropes are respectively installed on both sides of the bottom end of the movable ladder. The linkage ladder plate is located inside the lower fixed part and is connected to the linkage rope.

[0013] Preferably, the outer wall of the linkage ladder plate is fitted with the inner wall of the lower fixed part, and the linkage ladder plate is restricted by the lower fixed part.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model is equipped with a moving auxiliary component. When moving the ladder base, rotating the screw causes the screw to drive the linkage and roller bracket downward through the threaded connection with the ladder base. The downward moving roller bracket, together with the displacement roller, lifts one side of the ladder base. The same operation is performed on the displacement roller on the other side, so that the displacement roller on the other side lifts the other side of the ladder base. After being lifted, the setting position of the ladder base can be adjusted by pushing the ladder base. The position of the adjustable ladder can be conveniently adjusted by pushing. At the same time, when adjusting the position, the moving ladder base can be used to support the adjustable ladder.

[0016] 2. This utility model also includes an auxiliary ladder. Two sets of linkage ropes are installed on both sides of the bottom of the movable ladder. The linkage ladder plate is located inside the lower fixed part and is connected to the linkage ropes. The linkage ladder plate can move upward synchronously with the movable ladder as it moves upward, filling the space between the movable ladder and the ground, thereby assisting the user to climb the movable ladder via the linkage ladder plate. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the mobile auxiliary component structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the auxiliary ladder of this utility model;

[0020] Figure 4 This is a schematic diagram of the movable range of this utility model.

[0021] The numbers in the diagram represent:

[0022] 1. Ladder base; 2. Adjustable ladder; 21. Lower fixed part; 22. Movable ladder; 23. Limiting bolt; 3. Moving auxiliary component; 31. Roller bracket; 32. Linkage part; 33. Displacement roller; 34. Screw; 35. Pressure spring; 36. Auxiliary limit rod; 4. Auxiliary ladder; 41. Linkage rope; 42. Linkage ladder plate. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, highlighting the above and other technical features and advantages of the present invention. However, the following embodiments are merely preferred embodiments of the present invention and are not exhaustive.

[0024] Example:

[0025] like Figure 1 - Figure 4 As shown, this utility model provides a portable safety ladder for storing double-layer railway box girders, including a ladder base 1 and an adjustable ladder 2. The adjustable ladder 2 is installed in the middle of the ladder base 1 via a pivot. A set of moving auxiliary components 3 are installed on both sides of the ladder base 1. The moving auxiliary components 3 include a roller bracket 31, a linkage part 32, a displacement roller 33 and a screw 34.

[0026] The roller bracket 31 is located on the outside of the side of the ladder base 1. The linkage part 32 is formed in the middle of the roller bracket 31. Two sets of displacement rollers 33 are respectively installed at both ends of the roller bracket 31. The screw 34 is connected to the middle of the linkage part 32. The bottom end of the screw 34 is threadedly connected to the ladder base 1.

[0027] When moving the ladder base 1, rotating the screw 34 causes the screw 34 to drive the linkage 32 and roller bracket 31 to move downward through the threaded connection with the ladder base 1. The downward moving roller bracket 31, in conjunction with the displacement roller 33, lifts one side of the ladder base 1. The same operation is performed on the other side of the displacement roller 33, so that the other side of the displacement roller 33 lifts the other side of the ladder base 1. After being lifted, the setting position of the ladder base 1 can be adjusted by pushing the ladder base 1. After reaching the setting position, the displacement roller 33 is adjusted again to reset the displacement roller 33. The ladder base 1 contacts the ground to provide support for the adjustable ladder 2.

[0028] The moving auxiliary component 3 also includes a pressure spring 35, which is sleeved on the lower part of the screw 34. The two ends of the pressure spring 35 abut against the surfaces of the ladder base 1 and the linkage part 32, respectively. Under the elastic force of the pressure spring 35, the screw 34 is always in a pre-tight state, thereby maintaining a stable threaded connection between the screw 34 and the ladder base 1 and avoiding the problem of loosening during movement.

[0029] The moving auxiliary component 3 also includes auxiliary limiting rods 36. Two sets of auxiliary limiting rods 36 are respectively arranged on both sides of the linkage part 32. The bottom ends of the two sets of linkage parts 32 are connected to the ladder base 1. The linkage part 32 can drive the roller bracket 31 to slide relative to the ladder base 1. Under the restriction of the two sets of auxiliary limiting rods 36, the linkage part 32 can move vertically and stably relative to the ladder base 1, avoiding positional deviation when the linkage part 32 and the roller bracket 31 are displaced relative to the ladder base 1.

[0030] The displacement roller 33 is attached to the end of the ladder base 1 under the constraint of the roller bracket 31. The displacement roller 33 is arranged in an inclined manner. With the inclined arrangement, the pressure spring 35 can contact the ground when it moves down slightly, so that the pressure spring 35 can play a supporting role for the ladder base 1, so as to facilitate the pushing of the ladder base 1.

[0031] The adjustable ladder 2 includes a lower fixed part 21, a movable ladder 22, and a limiting bolt 23;

[0032] The lower fixed part 21 is installed in the middle of the ladder base 1 via a pivot. The movable ladder 22 is sleeved inside the lower fixed part 21. The limiting bolt 23 is installed on the side wall of the lower fixed part 21. The height of the movable ladder 22 relative to the lower fixed part 21 is limited by the limiting bolt 23. When the initial height of the movable ladder 22 does not meet the usage requirements, the movable ladder 22 is pushed upward to move it upward along the lower fixed part 21. The end of the upward-moving movable ladder 22 can cooperate with the corresponding beam storage platform. When the height of the movable ladder 22 meets the usage requirements, the setting position of the movable ladder 22 is locked by the limiting bolt 23.

[0033] The movable ladder 22 has several sets of screw holes on its side wall for connecting the limiting bolts 23. The screw holes are arranged at equal intervals on the side wall of the lower fixed part 21. After the movable ladder 22 is raised to the required position, the limiting bolts 23 are connected to the corresponding screw holes. The limiting bolts 23 in the corresponding screw holes play a supporting and limiting role for the movable ladder 22, thereby keeping the movable ladder 22 in the raised position. Through the design of several sets of screw holes, the movable ladder 22 can have a smaller single adjustment range.

[0034] The auxiliary ladder 4 includes a linkage rope 41 and a linkage ladder plate 42;

[0035] Two sets of linkage ropes 41 are respectively installed on both sides of the bottom end of the movable ladder 22. The linkage ladder plate 42 is set inside the lower fixed part 21. The linkage ladder plate 42 is connected to the linkage ropes 41. The linkage ladder plate 42 can move upward synchronously with the movable ladder 22.

[0036] The outer wall of the linkage ladder plate 42 is attached to the inner wall of the lower fixed part 21. The linkage ladder plate 42 is restricted by the lower fixed part 21. Under the restriction of the lower fixed part 21, when the linkage ladder plate 42 is vertically pulled by the movable ladder 22 and the linkage rope 41, the linkage ladder plate 42 can move vertically inside the lower fixed part 21, thereby filling the space between the movable ladder 22 and the ground, and thus assisting the user to climb the movable ladder 22 through the linkage ladder plate 42.

[0037] The above description is merely a preferred embodiment of the present utility model and is illustrative rather than restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present utility model, all of which will fall within the protection scope of the present utility model.

Claims

1. A portable safety ladder for storing double-layer railway box girders, characterized in that: The system includes a ladder base and an adjustable ladder. The adjustable ladder is mounted in the middle of the ladder base via a pivot. A set of moving auxiliary components is installed on both sides of the ladder base. The moving auxiliary components include a roller bracket, a linkage, a displacement roller, and a screw. The roller bracket is located on the outside of the side of the ladder base, the linkage is formed in the middle of the roller bracket, the two sets of displacement rollers are respectively installed at both ends of the roller bracket, the screw is connected to the middle of the linkage, and the bottom end of the screw is threaded to the ladder base.

2. The portable safety ladder for storing double-layer railway box girders as described in claim 1, characterized in that, The mobility aid also includes a pressure spring, which is sleeved on the lower part of the screw, and the two ends of the pressure spring abut against the surfaces of the ladder base and the linkage part, respectively.

3. The portable safety ladder for storing double-layer railway box girders as described in claim 2, characterized in that, The moving auxiliary component also includes auxiliary limiting rods. Two sets of auxiliary limiting rods are respectively arranged on both sides of the linkage part. The bottom ends of the two sets of linkage parts are connected to the ladder base. The linkage part can drive the roller bracket to slide relative to the ladder base.

4. The portable safety ladder for storing double-layer railway box girders as described in claim 2, characterized in that, The displacement rollers are fitted to the ends of the ladder base under the constraint of the roller bracket, and the displacement rollers are arranged at an angle.

5. The portable safety ladder for storing double-layer railway box girders as described in claim 4, characterized in that, The adjustable ladder includes a lower fixed part, a movable ladder, and a limiting bolt. The lower fixed part is installed in the middle of the ladder base via a pivot. The movable ladder is sleeved inside the lower fixed part. The limiting bolt is installed on the side wall of the lower fixed part. The height of the movable ladder relative to the lower fixed part is limited by the limiting bolt.

6. The portable safety ladder for storing double-layer railway box girders as described in claim 5, characterized in that, The movable ladder has several sets of screw holes on its side wall for connecting the limiting bolts. These sets of screw holes are arranged at equal intervals on the side wall of the lower fixed part.

7. The portable safety ladder for storing double-layer railway box girders as described in claim 5, characterized in that, The adjustable ladder is equipped with an auxiliary ladder inside. The auxiliary ladder includes a linkage rope and a linkage ladder plate. Two sets of linkage ropes are respectively installed on both sides of the bottom end of the movable ladder. The linkage ladder plate is located inside the lower fixed part and is connected to the linkage rope.

8. The portable safety ladder for storing double-layer railway box girders as described in claim 7, characterized in that, The outer wall of the linkage ladder plate is fitted with the inner wall of the lower fixed part, and the linkage ladder plate is restricted by the lower fixed part.

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