A movable safety fixing device for bridge deck ancillary construction

Abstract

The application relates to a movable safety fixing measure device for bridge deck accessory construction, and belongs to the technical field of bridge edge construction, which comprises two fixed frame bodies, a first roller is rotationally connected to the fixed frame body, a limiting plate is arranged at one end of the fixed frame body, a first telescopic rod is connected between the two limiting plates, a telescopic assembly for making the two fixed frame bodies close to or away from each other is arranged between the two fixed frame bodies, a second roller is arranged on the telescopic assembly, and a traction rope is connected to the frame body. The application avoids the need to install temporary supports, and reduces the damage to the bridge deck.

Description

Technical Field

[0001] This application relates to the field of bridge edge construction technology, and in particular to a movable safety fixing device for bridge deck ancillary construction. Background Technology

[0002] In recent years, with my country's vigorous development of infrastructure construction, the total operating mileage of railways nationwide has reached 139,000 kilometers, with bridges accounting for a large proportion of my country's high-speed railway lines. After the bridge deck is constructed, it typically requires additional work such as fine-tuning of the shielding plates, installation of steel railings, and installation of sound barriers near the beam flanges. To enhance worker safety during construction, temporary supports for securing safety belts are usually installed at nearby work locations.

[0003] Regarding the aforementioned technologies, due to the limited length of the safety belt, the working range of the workers becomes smaller after the safety belt is fixed on the temporary support. If they need to move to the next construction site, the temporary support must be reinstalled. Installing the temporary support requires drilling holes in the bridge deck, which damages the bridge deck surface. Summary of the Invention

[0004] To reduce the damage to the bridge deck caused by temporary supports, this application provides a movable safety fixing device for bridge deck auxiliary construction.

[0005] The technical solution for a movable safety fixing device for bridge deck auxiliary construction provided in this application is as follows:

[0006] A movable safety fixing device for bridge deck construction includes two fixed frames. A first roller is rotatably connected to each fixed frame. A limit plate is provided at one end of each fixed frame. A first telescopic rod is connected between the two limit plates. A telescopic component is provided between the two fixed frames to move the two fixed frames closer to or further apart. A second roller is provided on the telescopic component. A traction rope is connected to the frame.

[0007] By adopting the above technical solution, the distance between the two fixed frames is adjusted by the telescopic component to match the width of the protective wall or sill on the bridge deck. Then, the two fixed frames are fastened to the protective wall or sill on the wall. The fixed frames are then pushed, and they move along the protective wall or sill until the limiting plate abuts against the end of the sill. Then, the other two fixed frames are placed at the other end of the protective wall or sill, and the traction ropes at both ends are fastened together. Workers can then carry out construction along the length of the protective wall or sill by fastening the safety rope to the traction rope. The fixed frames are stably fastened to the protective wall or sill, avoiding the need to install temporary supports and reducing damage to the bridge deck. Workers do not need to repeatedly change the locking position of the safety rope, thus improving the construction efficiency.

[0008] Optionally, the telescopic assembly includes a first housing and two rotating screws. The fixed frame has two threaded grooves, which correspond one-to-one. The two ends of the rotating screws are respectively connected to the corresponding two threaded grooves. Each rotating screw is disposed at one end of the fixed frame, and the two rotating screws pass through the telescopic first housing simultaneously.

[0009] A first bevel gear is fitted onto the rotating screw. A rotating handle is provided on the first housing. The rotating handle is connected to a worm gear, which is rotatably connected inside the first housing. A first rotating shaft is rotatably connected to the first housing. A worm wheel is provided on the first rotating shaft. The worm gear meshes with the worm wheel. A second bevel gear is provided at both ends of the first rotating shaft. The first bevel gear meshes with the second bevel gear. A second roller is rotatably connected to the first housing.

[0010] By adopting the above technical solution, the worker turns the handle, which drives the worm gear to rotate, the worm gear to rotate the worm wheel, the worm wheel to rotate the first rotating shaft, the first rotating shaft to rotate the second bevel gears at both ends, the second bevel gears to rotate the first bevel gear, the first bevel gear to rotate the rotating screw, and the rotating screw to move the two fixed frames closer or further apart, thereby adjusting the distance between the two fixed frames so that the fixed frames can be fastened to protective walls or embankments of different widths.

[0011] Optionally, the fixing frame is a hollow structure, the threaded groove of the fixing frame has a limit hole, the rotating screw has a limit groove, a spring is provided in the fixing frame, the spring is connected to a limit block, the side of the limit block facing the telescopic first housing is an inclined arc surface, and the limit groove is adapted to the limit block.

[0012] By adopting the above technical solution, when the two frames are far apart, the limiting groove on the rotating screw aligns with the limiting block, and the spring drives the limiting block to insert into the limiting groove, thereby restricting the fixed frame from continuing to move away from the rotating screw. When the two fixed frames approach each other, the limiting groove squeezes the arc surface of the limiting block, causing the limiting block to disengage from the limiting groove, so that the two fixed frames can continue to approach and merge.

[0013] Optionally, the limiting plate is provided with a movable groove, and the first telescopic rod is provided with a locking block, which is inserted into the movable groove.

[0014] By adopting the above technical solution, the first telescopic rod can be removed from the limiting plate, which facilitates the inspection and replacement of the first telescopic rod.

[0015] Optionally, a second housing is provided on the first housing, a winding shaft is provided inside the second housing, a drive belt is provided on the winding shaft, a drive shaft is provided on the drive belt, a first gear is provided on the drive shaft, a connecting shaft is rotatably connected to the second housing, a second gear is provided on the connecting shaft, the first gear and the second gear mesh with each other, another drive belt is provided on the connecting shaft, a torsion spring is sleeved on the winding shaft, one end of the torsion spring is fixed to the winding shaft, the other end of the torsion spring is fixed to the second housing, a traction rope is wound on the winding shaft, and one end of the traction rope is fixed to the winding shaft, the traction rope extends out of the second housing and passes through the fixing frame, and a clamping plate is detachably connected to the drive belt, the clamping plate extends from the side of the second housing opposite to the first housing.

[0016] By adopting the above technical solution, when the traction rope is pulled out, the traction rope drives the winding shaft to rotate, the winding shaft drives the transmission belt connected to it to rotate, the transmission belt drives the transmission shaft and the first gear to rotate, the first gear drives the second gear to rotate, the second gear drives the linkage shaft to rotate, and the linkage shaft drives another transmission belt to rotate, thereby realizing that the two transmission belts rotate in opposite directions.

[0017] When the traction ropes at both ends of the retaining wall are interlocked, the torsion spring tends to return to its natural state and tightens the two traction ropes. At this time, one worker pulls the two traction ropes to ensure that the traction ropes are at a safe distance from the edge of the bridge, i.e., the stretching safety distance. Another worker installs two clamping plates on each of the transmission belts and clamps the transmission belts to the protective wall or retaining wall.

[0018] During construction, when workers are near the edge of the bridge, the traction rope pulls, causing the two drive belts to rotate relative to each other, which in turn brings the two clamping plates closer together. When the worker reaches the safe working distance from the edge, the clamping plates clamp onto the protective wall or curb, limiting the extension of the traction rope and thus preventing the worker from continuing to approach the bridge edge. Furthermore, the clamping plates increase the friction between the fixed frame and the protective wall or curb, reducing the risk of the fixed frame overturning in the event of a worker's fall from a height. This strengthens the safety protection for workers during construction and also constrains the worker's working distance from the bridge edge, reducing instances of workers violating safety regulations.

[0019] Optionally, a guide roller is provided inside the fixed frame, and the traction rope passes around the guide roller.

[0020] By adopting the above technical solution, the traction rope can be smoothly pulled out along the length of the protective wall or the sill, reducing the possibility of damage caused by friction between the traction rope and the fixed frame during the pulling process, and strengthening the protection of the traction rope.

[0021] Optionally, a second telescopic rod is rotatably connected inside the second housing, and the winding shaft has a telescopic groove. The second telescopic rod is threaded into the telescopic groove of the winding shaft. The torsion spring is sleeved on the second telescopic rod, with one end of the torsion spring fixed to the second telescopic rod and the other end of the torsion spring fixed to the second housing. A winding reel is rotatably connected to the winding shaft, and the traction rope is wound around the winding reel.

[0022] By adopting the above technical solution, the storage shaft allows for the storage of longer traction ropes within the second housing, ensuring that the rope length meets the requirements of longer protective walls or retaining walls. When the traction rope is pulled out, it drives the winding shaft to rotate, causing one end of the second telescopic rod to extend into the telescopic groove. When the second telescopic rod abuts against the groove wall, the winding shaft drives the second telescopic rod to rotate, at which point the torsion spring gradually twists. This prevents the torsion spring from being in a torsional state immediately after the traction rope is pulled out, thus improving the protection of the torsion spring. Furthermore, the winding reel allows for the pulling out of the second housing of even longer traction ropes.

[0023] Optionally, the conveyor belt has a sliding ring groove and a sliding hole communicating with the sliding ring groove. The clamping plate is located in the sliding ring groove, and a fixing screw passes through the sliding hole. The fixing screw passes through the clamping plate, and fixing nuts are threaded to both ends of the fixing screw. The fixing nuts are tightly abutted against the conveyor belt.

[0024] By adopting the above technical solution, the clamping plate is inserted into the sliding ring groove, and then the fixing screw passes through the clamping plate and its two ends are transmitted out of the sliding hole by the transmission belt. The worker can adjust the clamping plate along the sliding ring groove. After the clamping plate is adjusted, the fixing nuts are screwed on both ends of the fixing screw to fix the clamping plate.

[0025] Optionally, a ratchet is provided on the rotating shaft of the second roller, and ratchet teeth are provided on the fixed frame, with the ratchet and ratchet teeth meshing together.

[0026] By adopting the above technical solution, the second roller can only move in one direction, reducing the possibility of the fixed frame falling off the end of the protective wall or the anti-slope during use.

[0027] Optionally, each of the two fixed frames is provided with four first rollers on one side opposite to each other, with two first rollers forming a group. The two groups of first rollers are respectively provided at one end of each fixed frame, and two second rollers are provided at both ends of the first housing.

[0028] By adopting the above technical solution, the first roller at each end of the fixed frame and the two rollers on the first housing provide more stable support for the fixed frame against the curb and the protective wall.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. Two fixed frames are fastened to both ends of the retaining wall. Then the traction ropes of the two fixed frames are fastened together. The worker fastens the safety rope to the traction rope and carries out construction along the length of the retaining wall or sill. The worker does not need to repeatedly unfasten the safety rope and fasten it to other positions, which improves the worker's construction efficiency and avoids the setting of temporary supports, reducing damage to the bridge deck.

[0031] 2. When workers reach the dangerous distance of the bridge edge during construction, the traction rope pulls the winding shaft to rotate. The rotation of the winding shaft causes the clamping blocks on the transmission belt to clamp the anti-slip or protective wall, limiting the extension of the traction rope and restraining the worker from moving closer to the bridge edge, thus enhancing the protection of the worker.

[0032] 3. The clamping blocks clamp the protective wall or curb, increasing the friction between the fixed frame and the protective wall or curb, reducing the possibility of the fixed frame overturning, and improving the safety of the fixed frame. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0034] Figure 2 This is a schematic diagram illustrating the structure of the ratchet in an embodiment of this application.

[0035] Figure 3 yes Figure 1 An enlarged schematic diagram of part A in the middle.

[0036] Figure 4 This is a schematic diagram illustrating the structure of the telescopic component in an embodiment of this application.

[0037] Figure 5 yes Figure 4 Enlarged schematic diagram of part B.

[0038] Figure 6 This is a schematic diagram illustrating the structure of the threaded groove 16 in an embodiment of this application.

[0039] Figure 7 yes Figure 6 An enlarged schematic diagram of section C.

[0040] Figure 8 This is a schematic diagram illustrating the structure of the winding shaft and the drive belt in an embodiment of this application.

[0041] Figure 9 yes Figure 8 An enlarged schematic diagram of part D in the middle.

[0042] Figure 10 This is a schematic diagram illustrating the structure of the second telescopic rod in an embodiment of this application.

[0043] Figure 11 yes Figure 10 An enlarged schematic diagram of section E in the middle.

[0044] Explanation of reference numerals in the attached drawings: 1. Fixed frame; 11. First roller; 12. Ratchet; 13. Ratchet tooth; 14. Traction rope; 15. Movable groove; 16. Threaded groove; 17. Spring; 18. Limiting block; 19. Limiting hole; 2. Telescopic assembly; 21. Second roller; 22. First housing; 23. Rotating screw; 231. Limiting groove; 24. Rotating handle; 25. Worm gear; 26. First rotating shaft; 27. Worm gear; 28. First bevel gear; 29. ​​Second... 3. Bevel gear; 4. Limiting plate; 5. Snap-fit ​​block; 6. First telescopic rod; 7. Second housing; 8. Rewinding shaft; 9. Telescopic groove; 10. Second telescopic rod; 11. Torsion spring; 2. Drive belt; 32. Sliding ring groove; 43. Sliding hole; 54. Drive shaft; 6. First gear; 7. Second gear; 8. Rewinding reel; 9. Guide roller; 10. Linkage shaft; 11. Clamping plate; 12. Fixing screw; 13. Fixing nut. Detailed Implementation

[0045] The following is in conjunction with the appendix Figure 1-11 This application will be described in further detail.

[0046] This application discloses a movable safety fixing device for bridge deck auxiliary construction.

[0047] like Figure 1 , Figure 2 and Figure 3 A movable safety fixing device for bridge deck auxiliary construction includes two fixed frames 1, which are connected together by a telescopic component 2 for moving the two fixed frames 1 closer together or further apart. Each column of the fixed frame 1 is rotatably connected to two first rollers 11, which roll horizontally and abut against the side of the protective wall. The fixed frame 1 has a hollow structure, with the rotation shaft of the first rollers 11 extending out of the fixed frame 1. A ratchet 12 is provided on the rotation shaft of the first rollers 11, and ratchet teeth 13 meshing with the ratchet 12 are provided on the fixed frame 1. Both the telescopic component 2 and the fixed frame 1 are equipped with second rollers 21, which roll along the length of the top surface of the protective wall. A traction rope 14 is connected to the fixed frame 1, with its guide shaft perpendicular to the side of the protective wall.

[0048] like Figure 4 A limiting plate 3 is provided on the fixed frame 1. The limiting plate 3 has a movable groove 15. The two limiting plates 3 are connected by a first telescopic rod 32. The two ends of the first telescopic rod 32 are provided with locking blocks 31, which are inserted into the movable groove 15.

[0049] Workers adjust the distance between the two fixed frames 1 according to the width of the protective wall and through the telescopic component 2. Then, they fasten the two fixed frames 1 at both ends of the protective wall and make the limiting plate 3 hold the end of the protective wall in place. They then fasten the traction ropes 14 on the fixed frames 1 at both ends of the retaining wall and fasten the worker's safety belt to the traction ropes 14. Workers can then carry out bridge edge work along the length of the traction ropes 14. Workers do not need to frequently change the buckle points of the safety ropes, which improves the efficiency of the workers' construction. At the same time, there is no need to set up temporary supports on the bridge deck to connect the safety ropes, which reduces damage to the bridge deck.

[0050] like Figure 4 , Figure 5 and Figure 6The telescopic component 2 includes a first housing 22 and two rotating screws 23. Threaded grooves 16 are provided at both ends of opposite sides of the fixed frame 1, with the threaded grooves 16 of the two fixed frame 1s corresponding one-to-one. The two ends of the rotating screws 23 are threaded into the corresponding two threaded grooves 16, and the two rotating screws 23 are parallel to each other. Both rotating screws 23 pass through the first housing 22. A second roller 21 is located at the bottom of the first housing 22. A rotating handle 24 is rotatably connected to the top of the first housing 22. The rotating handle 24 is connected to a worm gear 25, which is rotatably connected inside the first housing 22. A first rotating shaft 26 is rotatably connected inside the first housing 22. A worm gear 27 meshing with the worm gear 25 is provided on the first rotating shaft 26. Second bevel gears 29 are provided at both ends of the first rotating shaft 26. A first bevel gear 28 is provided on the rotating screws 23, and the first bevel gear 28 meshes with the second bevel gear 29.

[0051] like Figure 6 and Figure 7 A spring 17 is installed inside the fixed frame 1. The spring 17 is connected to a limit block 18. A limit hole 19 is provided on the fixed frame 1 for the limit block 18 to extend into the threaded groove 16. A limit groove 231 is provided on the rotating screw 23. The side of the limit block 18 facing the first housing 22 is an inclined arc surface. The limit block 18 is adapted to the limit groove 231.

[0052] When adjusting the distance between the two fixed frames 1, the rotating handle 24 is turned, which drives the worm gear 25 to rotate. The worm gear 25 drives the first rotating shaft 26 to rotate, which drives the second bevel gear 29 to rotate. The second bevel gear 29 drives the first bevel gear 28 to rotate, which drives the rotating screw 23 to rotate. The rotating screw 23 causes the two fixed frames 1 to move relative to each other, thereby adjusting the two fixed frames 1. When the two fixed frames 1 are far apart, the limiting groove 231 of the rotating screw 23 is aligned with the limiting hole 19 of the fixed frame 1. The spring 17 drives the limiting block 18 to insert into the limiting groove 231, thereby limiting the rotating screw 23 from continuing to rotate and causing the two fixed frames 1 to move away from each other, reducing the possibility of the fixed frames 1 falling off the rotating screw 23.

[0053] like Figure 8 , Figure 9 and Figure 10A second housing 4 is located at the bottom of the first housing 22. A winding shaft 41 is rotatably connected inside the second housing 4. One end of the winding shaft 41 is rotatably connected to one side of the second housing 4, and the other end of the winding shaft 41 has a telescopic groove 411. A second telescopic rod 42 is threadedly connected to the telescopic groove 411. The end of the second telescopic rod 42 away from the winding shaft 41 is rotatably connected to the second housing 4. A torsion spring 43 is fitted on the second telescopic rod 42. One end of the torsion spring 43 is fixed to the second telescopic rod 42, and the other end of the torsion spring 43 is fixed to the second housing 4. A drive belt 44 is provided on the take-up shaft 41. A drive shaft 45 is provided at the end of the drive belt 44 away from the take-up shaft 41. The drive shaft 45 is rotatably connected inside the second housing 4. A first gear 46 is provided on the drive shaft 45. A connecting shaft 410 is rotatably connected inside the second housing 4. A second gear 47 is provided on the connecting shaft 410. The first gear 46 and the second gear 47 mesh. Another drive belt 44 is provided on the connecting shaft 410. A take-up reel 48 is provided on the take-up shaft 41. A guide roller 49 is provided on the second housing 4. A traction rope 14 is wound on the take-up reel 48 and extends out of the second housing 4 after passing over the guide roller 49.

[0054] like Figure 9 , Figure 10 and Figure 11 The two transmission belts 44 have sliding ring grooves 441 along their contour direction on their transmission surfaces. The transmission belts 44 have several sliding holes 442 that communicate with the sliding ring grooves 441. A clamping plate 5 is provided in the sliding ring grooves 441. A fixing screw 51 passes through the sliding holes 442 of the transmission belts 44. The fixing screw 51 passes through the clamp and is threaded with fixing nuts 52 at both ends. The fixing nuts 52 are tightly abutted against the transmission belts 44.

[0055] When the worker pulls the traction ropes 14 at both ends of the protective wall, the traction ropes 14 drive the winding reel 48 to rotate, the winding reel 48 drives the winding shaft 41 to rotate, the winding shaft 41 drives the transmission belt 44 to rotate, and at the same time the winding shaft 41 drives the threaded end of the second telescopic rod 42 to extend into the telescopic groove 411. When the threaded end of the second telescopic rod 42 is fully extended into the winding shaft 41, the winding shaft 41 drives the second telescopic rod 42 to rotate at the same time. At this time, the torsion spring 43 is in a torsional state. After the traction ropes 14 at both ends of the protective wall are interlocked, the torsion spring 43 tends to return to its natural state. At this time, the two traction ropes 14 are in a taut state.

[0056] Then, a worker pulls the traction rope 14 to a safe distance from the edge of the bridge. The traction rope 14 pulls, causing the winding reel 48 to rotate. The winding reel 48 then rotates the winding shaft 41, which in turn rotates the transmission belt 44 connected to it. The transmission belt 44 then rotates the transmission shaft 45, which in turn rotates the first gear 46. The first gear 46 then rotates the second gear 47, which in turn rotates the connecting shaft 410. The connecting shaft 410 then rotates another transmission belt 44. Next, another worker inserts the clamping plate 5 into the sliding ring groove 441 and passes the fixing screw 51 through the clamping plate 5. The worker then moves the clamping plate 5 along the direction of the transmission belt 44, so that the two clamping plates 5 are against the protective wall. Finally, the fixing screw 51 is passed through the stiffening plate and the fixing nut 52 is tightened to fix the clamping plate 5 onto the transmission belt 44. At this time, the worker releases the traction rope 14, and the torsion spring 43 drives the traction rope 14 to straighten and become parallel to the protective wall, while the two clamping plates 5 move away from each other.

[0057] Workers fasten safety belts to the traction rope 14 to perform their work. When a worker moves to the safe red line that is allowed to be reached at the edge of the bridge, the clamping plate 5 presses against the protective wall, restricting the worker from moving further beyond the safe red line, thus improving worker safety. Workers can adjust the initial distance of the clamping plate 5 to change the distance they can reach from the edge of the bridge. Furthermore, in the event of a worker's fall, the clamping plate 5 clamps against the protective wall, increasing the friction between the fixed frame 1 and the protective wall, reducing the possibility of the fixed frame 1 overturning off the protective wall, and improving the safety of the safety fixing device.

[0058] The implementation principle of this application embodiment is as follows: The worker cranks the rotating handle 24, which drives the second bevel gear 29 to rotate through the worm gear 27 and worm 25. The second bevel gear 29 drives the first bevel gear 28 and the rotating screw 23 to rotate, causing the two fixed frame bodies 1 to move closer or further apart, so that the distance between the fixed frame bodies 1 matches the width of the protective wall. Then, the two fixed frame bodies 1 are fastened to both ends of the protective wall. The two fixed frame bodies 1 pull the traction rope 14 to interlock. The traction rope 14 drives the winding shaft 41 to rotate. The winding shaft 41 first drives the threaded section of the second telescopic rod 42 to extend into the extension. Inside the constriction groove 411, the second telescopic rod 42 is rotated, causing the torsion spring 43 to be in a torsional state. At this time, the two traction ropes 14 are interlocked and the traction ropes 14 are in a taut state. Then, one worker pulls the traction rope 14 to a safe distance from the edge of the bridge, while another worker fixes the clamping plate 5 to the transmission belt 44 with the fixing screw 51 and fixing bolt, and makes the clamping plate 5 stick to the protective wall. This ensures that when the worker reaches the safe distance from the edge of the bridge to carry out the work, the traction rope 14 can no longer be pulled, thereby strengthening the protection of the worker and reducing the risk of the worker falling from a height.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A portable safety fixture for bridge deck appendage construction, characterized by: The utility model provides a kind of telescopic frame, including two fixed frame body (1), first roller (11) is rotatably connected on the fixed frame body (1), one end of the fixed frame body (1) is provided with limiting plate (3), first telescopic link (32) is connected between two limiting plate (3), telescopic component (2) for making two fixed frame body (1) close to each other or away from each other is provided between two fixed frame body (1), second roller (21) is provided on the telescopic component (2), traction rope (14) is connected on the frame body; The telescopic component (2) includes a first housing (22) and two rotating screws (23); The first housing (22) is provided with a second housing (4), the second housing (4) is provided with a winding shaft (41), the winding shaft (41) is provided with a transmission belt (44), the transmission belt (44) is provided with a transmission shaft (45), the transmission shaft (45) is provided with a first gear (46), the second housing (4) is rotatably connected with a linkage shaft (410), the linkage shaft (410) is provided with a second gear (47), the first gear (46) and the second gear (47) are engaged with each other, the linkage shaft (410) is provided with another transmission belt (44), the winding shaft (41) is provided with a torsion spring (43), one end of the torsion spring (43) is fixed to the winding shaft (41), the other end of the torsion spring (43) is fixed to the second housing (4), the traction rope (14) is wound around the winding shaft (41), and one end of the traction rope (14) is fixed to the winding shaft (41), the traction rope (14) extends out of the second housing (4) and passes through the fixed frame body (1), the transmission belt (44) is detachably connected with a clamping plate (5), the clamping plate (5) extends out of the side of the second housing (4) away from the first housing (22); The fixed frame body (1) is provided with two threaded grooves (16), the threaded grooves (16) of the two fixed frame bodies (1) correspond one by one, the two ends of the rotating screw (23) are connected in the corresponding two threaded grooves (16) respectively, the rotating screw (23) is arranged at one end of the fixed frame body (1), and the two rotating screws (23) pass through the first housing (22) at the same time; The rotating screw (23) is provided with a first bevel gear (28), the first housing (22) is provided with a rotating handle (24), the rotating handle (24) is connected with a worm (25), the worm (25) is rotatably connected in the first housing (22), the first housing (22) is rotatably connected with a first rotating shaft (26), the first rotating shaft (26) is provided with a worm wheel (27), the worm (25) is engaged with the worm wheel (27), the two ends of the first rotating shaft (26) are provided with a second bevel gear (29), the first bevel gear (28) is engaged with the second bevel gear (29), and the second roller (21) is rotatably connected to the first housing (22). The second shell (4) is rotationally connected with a second telescopic rod (42), the winding rotating shaft (41) is provided with a telescopic slot (411), the second telescopic rod (42) is threadedly connected in the telescopic slot (411) of the winding rotating shaft (41), the torsional spring (43) is sleeved on the second telescopic rod (42), one end of the torsional spring (43) is fixed on the second telescopic rod (42), the other end of the torsional spring (43) is fixed on the second shell (4), the winding rotating shaft (41) is rotationally connected with a winding disc (48), and the traction rope (14) is wound on the winding disc (48).

2. The bridge deck appendage construction movable safety fixation device according to claim 1, characterized in that: The fixed frame body (1) is a hollow structure, the threaded slot (16) of the fixed frame body (1) is provided with a limiting hole (19), the rotating screw rod (23) is provided with a limiting slot (231), the fixed frame body (1) is provided with a spring (17), the spring (17) is connected with a limiting block (18), one side of the limiting block (18) opposite to the first shell (22) is an inclined circular arc surface, and the limiting slot (231) is matched with the limiting block (18).

3. The bridge deck appendage construction movable safety fixation device of claim 1, wherein: The limiting plate (3) is provided with a movable slot (15), and the first telescopic rod (32) is provided with a clamping block (31) which is inserted into the movable slot (15).

4. The bridge deck appendage construction movable safety fixation device of claim 1, wherein: The fixed frame body (1) is provided with a guide roller (49), and the traction rope (14) passes through the guide roller (49).

5. The bridge deck appendage construction movable safety fixation device of claim 1, wherein: The transmission belt (44) is provided with a sliding ring groove (441), the transmission belt (44) is provided with a sliding hole (442) in communication with the sliding ring groove (441), the clamping plate (5) is located in the sliding ring groove (441), the sliding hole (442) is provided with a fixing screw rod (51), the fixing screw rod (51) passes through the clamping plate (5), and both ends of the fixing screw rod (51) are threadedly connected with fixing nuts (52) which are tightly abutted with the transmission belt (44).

6. The bridge deck appendage construction portable safety fixture of claim 1, wherein: The rotating shaft of the second roller (21) is provided with a ratchet wheel (12), the fixed frame body (1) is provided with a ratchet tooth (13), and the ratchet wheel (12) and the ratchet tooth (13) are engaged.

7. The bridge deck appendage construction movable safety fixation device of claim 1, wherein: The opposite sides of the two fixed frame bodies (1) are provided with four first rollers (11), every two first rollers (11) form a group, and two groups of first rollers (11) are arranged at the two ends of the fixed frame body (1) respectively, and the two ends of the first shell (22) are provided with two second rollers (21).

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