CN220283299U - Bridge construction anti-drop flexible suspender tightening structure - Google Patents

Abstract

The utility model relates to the technical field of slings, specifically to a bridge construction anti-falling flexible sling tightening structure, which includes a tightening strap, a spring, a fixed base, a sliding part and a control part; the fixed base includes a placing plate and a fixing block, and the placing plate has two Fixing blocks are respectively provided at each end, and two tightening straps are symmetrically arranged. One end of the two tightening straps is fixedly connected to the middle part of the lower side of the fixing base, and the other end is plugged into the two fixed blocks respectively; springs, sliding parts and control parts are all provided Two parts, two sliding parts, a control part and a spring respectively control the tightening or relaxing of the two tightening belts; the side part of the sliding part is plugged into the fixed block and extends into the fixed block to engage with the tightening belt through a toothed structure or Separate, the lower part of the sliding part is slidingly connected to the placing plate; one end of the control part is rotationally connected to the placing plate, and the other end is in contact with the sliding part. One end of the spring is fixedly connected to the placing plate, and the other end is fixedly connected to the sliding part; the tightening structure can Tighten the flexible sling between the bridge component and the hook to reduce safety hazards.

Description

A kind of anti-falling flexible sling tightening structure for bridge construction

Technical field

The utility model relates to the technical field of slings, and in particular to a flexible sling tightening structure that prevents falling off during bridge construction.

Background technique

Flexible slings are lightweight and have a large load capacity. They are currently widely used in bridge hoisting construction. With the increase in hoisting equipment hoisting projects, people are paying more and more attention to safety issues during the hoisting process. During the hoisting process, The middle part of the existing flexible sling between the bridge component and the hook of the hoisting equipment cannot be tightened. The flexible sling is unstable during the hoisting process. There is a hidden danger that the bridge component will fall off from the sling. Because the bridge component is large in size and heavy in weight, once the If it falls off, it will seriously endanger the safety of construction workers.

Therefore, there is an urgent need for an anti-falling flexible sling tightening structure for bridge construction, which can avoid the problem that the flexible sling is easily separated from the bridge components during hoisting.

Utility model content

In view of the above problems, the present utility model provides an anti-falling flexible sling tightening structure for bridge construction, which can tighten the connection between the flexible sling and the hook during the lifting of the flexible sling, thereby reducing potential safety hazards.

The technical solutions adopted by this utility model to solve its technical problems:

A bridge construction anti-falling flexible sling tightening structure includes a tightening belt, a spring, a fixed base, a sliding piece and a control piece; the fixed base includes a placing plate and a fixing block, and fixed blocks are respectively provided at both ends of the placing plate. Two tightening straps are symmetrically arranged, one end of the two tightening straps is fixedly connected to the middle part of the lower side of the fixed seat, and the other end is plugged into the two fixed blocks respectively; the spring, sliding piece and control piece are each provided with two pieces. The two springs, sliding parts and control parts are symmetrically arranged, and the two springs, sliding parts and control parts respectively control the tightening or relaxing of the two tightening belts; the side parts of the two sliding parts are respectively plugged into the two fixed blocks. And extends into the fixed block and engages or separates with the tightening belt through the toothed structure, and the lower part of the sliding part is slidingly connected with the placing plate; one end of each control part is rotationally connected with the placing plate, and the other end is in contact with the sliding part; each piece One end of the spring is fixedly connected to the placing plate, and the other end is fixedly connected to the side of the sliding member away from the fixed block.

Preferably, two grooves are provided on the upper surface of the placing plate. The grooves extend from the middle of the placing plate to the fixed block. A fixed plate is fixed on the grooves. A chute is provided on the fixed block, close to the placing plate. A moving groove is provided on one side, and the chute, the moving groove and the groove are connected and arranged.

Preferably, one end of the tightening belt is a tightening end and the other end is a contact end. A plurality of rack structures are fixed on the tightening end, and the plurality of rack structures are evenly spaced along the length of the tightening belt. ; The tightening end is plugged into the fixed block through the chute.

Preferably, the sliding member includes a slide block, one end of which is provided with a tightening side, and an upper part of the other end is provided with an arc boss, the tightening side includes a plurality of rack structures 2, and a plurality of rack structures 2 They are evenly spaced along the length direction of the slider, and the rack structure two on the tightening side can extend into the inside of the fixed block to mesh with the rack structure one on the tightening end.

Preferably, the control part includes a rotating plate, a buckle block, a rotating shaft and a clip spring. A buckle block is provided on the upper part of the rotating plate. The rotating plate and the placing plate are rotationally connected through the rotating shaft. The clamp spring is spirally wound on the rotating shaft. The clip spring One end is fixedly connected to the lower part of the groove, and the other end is fixedly connected to the rotating plate.

Preferably, the fixed plate is provided between the rotating plate and the slider, one end of the spring is fixedly connected to the slider, and the other end is fixedly connected to the fixed plate.

Preferably, the bridge construction anti-falling flexible sling tightening structure is provided on the sling body, the first sling buckle and the second sling buckle are respectively provided at both ends of the sling body, and a protective cover is provided in the middle of the sling body, and the protective cover is connected with the third sling body. A hook is fixed between the hanging buckles.

Preferably, the two tightening straps are respectively connected to the two ends of the fixing base to form two annular holes, one of which is connected between the hook and the protective cover, and the other annular hole is connected between the protective cover and the second hanging buckle. between.

Preferably, a plurality of rack structures 3 are arranged evenly spaced on the tightening belt. The upper part of the rack structure 3 is provided with a slope. A plurality of rack structures 4 are arranged evenly spaced on the slider. The rack structure The fourth lower part is provided with a matching inclined surface, and the rack structure 3 and the rack structure 4 have the same shape and opposite directions.

Compared with the existing technology, the beneficial effects of this utility model are:

The utility model describes a bridge construction anti-falling flexible sling tightening structure that has a tightening function by being installed on the flexible sling between the bridge component and the hook. The fixed seat and the tightening strap are on the sliding part, Under the action of the control parts and springs, the tightening structure can be tightened and loosened, which facilitates the adjustment work of the construction workers. It can also tighten or loosen one end of the flexible sling to complete the assembly and unloading of the bridge components. It reduces the instability of the flexible sling during hoisting and minimizes the risk of bridge components falling off. The tightening structure is flexible and convenient to operate and can quickly realize the tightening function.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings needed to describe the embodiments or the prior art. Obviously, for those of ordinary skill in the art, Generally speaking, other drawings can also be obtained based on these drawings without exerting creative work.

Figure 1 is a schematic structural diagram of Embodiment 1 of the present utility model applied to a flexible sling;

Figure 2 is a schematic structural diagram of Embodiment 1 of the present utility model;

Figure 3 is a partial cross-sectional view of an embodiment of the present utility model;

Figure 4 is a schematic cross-sectional view of the first embodiment of the present utility model in the front direction;

Figure 5 is a schematic cross-sectional view of a top view of the first embodiment of the present utility model;

Figure 6 is a partial enlarged view of area A in Figure 5;

Figure 7 is a schematic cross-sectional view of the two tooth-shaped structures in the embodiment of the present invention.

Explanation of reference symbols:

1. Tightening belt; 11. Tightening end; 12. Contact end; 2. Spring; 3. Fixing seat; 31. Placement plate; 311. Groove; 312. First lug; 313. Fixed plate; 32. Fixed block; 321, chute; 322, moving groove; 33, fixed head; 4, sliding piece; 41, tightening side; 42, slide block; 43, arc boss; 5, control piece; 51, rotating plate ; 52. Buckle block; 53. Second lug; 54. Rotating shaft; 55. Clip spring; 6. Connecting hook; 7. Sling body; 71. First sling; 72. Second sling; 8. Hook; 9. Protective cover; 10. Hook; 101. First hook; 102. Second hook.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all implementations. example. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

In the following description of the utility model, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or positional relationship based on that shown in the accompanying drawings. The orientation or positional relationship is only to facilitate the description of the present invention and simplify the description, but does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. The term "connection" only refers to the connection between devices and has no special meaning.

Specific Embodiments Referring to Figures 1-6, a bridge construction anti-falling flexible sling tightening structure includes a tightening strap 1, a spring 2, a fixed base 3, a sliding member 4 and a control member 5; the fixed base 3 includes a Plate 31 and fixing block 32. Fixing blocks 32 are respectively provided at both ends of the placing plate 31. Two of the tightening straps 1 are symmetrically arranged. One end of the two tightening straps 1 is fixedly connected to the middle part of the lower side of the fixing base 3, and the other is fixedly connected to the middle part of the lower side of the fixing base 3. One end is plugged into the two fixed blocks 32 respectively; the spring 2, the sliding member 4 and the control member 5 are each provided with two pieces. The two springs 2, the sliding member 4 and the control member 5 are arranged symmetrically. 4 and the control part 5 respectively control the tightening or relaxing of the two tightening belts 1; the side parts of the two sliding parts 4 are respectively plugged into the two fixed blocks 32, and extend into the fixed blocks 32 to pass the tightening belt 1 The toothed structure engages or separates, and the lower part of the sliding member 4 is slidingly connected to the placement plate 31; one end of each control member 5 is rotationally connected to the placement plate 31, and the other end is in contact with the sliding member 4; one end of each spring 2 It is fixedly connected to the placing plate 31 , and the other end is fixedly connected to the side of the sliding member 4 away from the fixed block 32 .

The placement plate 31 can be a square plate. The upper surface of the placement plate 31 is provided with two grooves 311. The grooves 311 extend from the middle of the placement plate 31 to the fixed block 32. The groove 311 is provided at one end away from the fixed block 32. The first lugs 312 are provided in two pieces. The two first lugs 312 are respectively arranged on both sides of the groove 311 for connecting the control member 5. A fixing plate 313 is fixed on the groove 311. The fixing plate 313 is provided between the sliding member 4 and the control member 5, and the spring 2 is provided between the sliding member 4 and the fixed plate 313. One end of the spring 2 is fixedly connected to the fixed plate 313; the fixed block 32 is provided with a sliding member from bottom to top. The groove 321 is provided with a moving groove 322 on one side toward the middle of the placement plate 31. The slide groove 321, the moving groove 322 and the groove 311 are connected and arranged; the fixed base 3 also includes a fixed head 33, and the fixed head 33 is provided with two pieces. The two fixed heads 33 are fixedly arranged in the lower middle part of the placing plate 31 and are fixedly connected with the placing plate 31 .

The two tightening straps 1 are connected to the two ends of the fixing base 3 to form two annular holes. One end of the tightening strap 1 is a tightening end 11 and the other end is a contact end 12; the tightening end 11 is connected to the fixing base 3. 3. The fixed block 32 at one end is plugged in. A plurality of rack structures are fixed on the tightening end 11. The plurality of rack structures are evenly spaced along the length of the tightening end 11. The contact end 12 is far away from the beam. One end of the tight end 11 is connected to one of the fixed heads 33 by bolts and locked with nuts. The contact end 12 is used to accommodate the flexible sling. When the tightening structure is used in the lifting process of the flexible sling, the tightening strap 1 surrounds the flexible sling. The sling is placed in the annular hole, and the contact end 12 is the end of the tightening belt 1 that contacts the flexible sling.

The slider 4 includes a slider 42. One end of the slider 42 is provided with a tightening side 41, the upper part of the other end is provided with an arc boss 43, and the lower part of the other end is connected to the spring 2. The tightening side 41 includes a plurality of Rack structure two, multiple rack structures two are evenly spaced along the length direction of the slider 42, the rack structure two on the tightening side 41 can extend into the inside of the fixed block 32 and the rack structure on the tightening end 11 An engagement; the arc-shaped boss 43 is provided on the upper part of the slider 42 for abutting or separating from the control member 5; when the tightening structure is used in the lifting process of the flexible sling, the control member 5 and the arc-shaped boss 43 abuts, the pressure in the control part 5 is transmitted to the slider 42, pushing the slider 42 to slide along the groove 311 toward the fixed block 32. The movement of the slider 42 causes the spring 2 to continue to extend until the tightening side 41 The rack structure 2 on the upper body meshes with the rack structure 1 on the tightening end 11 to lock the flexible sling wrapped in the contact end 12 to tighten the flexible sling; when the position of the tightening structure needs to be adjusted after the use of the tightening structure is completed , pull the control member 5 to separate the control member 5 from the arc-shaped boss 43. Under the elastic force of the spring 2, the slider 42 moves along the groove 311 in the direction away from the fixed block 32, causing the tightening side 41 to move upward. The rack structure 2 is separated from the rack structure 1 on the tightening end 11, and the construction personnel can adjust the tightening belt 1 to relax the flexible sling.

The control part 5 includes a rotating plate 51, a buckle block 52, a second lug 53, a rotating shaft 54, and a clip spring 55; the upper part of the rotating plate 51 is provided with a buckle block 52, and the lower part of the buckle block 52 has an arc-shaped groove. The shaped groove fits the surface shape of the arc-shaped boss 43 and can be in contact with or separated from the arc-shaped boss 43, which is convenient for construction workers to adjust the tightening structure to tighten or loosen the flexible sling. The lower part of the rotating plate 51 is provided with a third There are two lugs 53. The second lugs 53 are provided in two pieces. The two second lugs 53 are respectively fixed on both sides of the lower part of the rotating plate 51. The rotating plate 51 is rotationally connected to the placing plate 31 through the rotating shaft 54. The two ends of the rotating shaft 54 are respectively Pass through the two pieces of second lugs 53 and connect with the first lugs 312. The first lugs 312 and the second lugs 53 are arranged concentrically. The clip spring 55 is spirally wound on the rotating shaft 54, and the two ends of the clip spring 55 are divided toward Extending outward, one end is fixedly connected to the lower part of the groove 311, and the other end is fixedly connected to the rotating plate 51; when the tightening structure is used in the lifting process of the flexible sling, under the elastic force of the clip spring 55, the buckle block 52 and the arc The shaped boss 43 abuts, and the slider 42 moves to continue extending the spring 2 until the rack structure 2 on the tightening side 41 meshes with the rack structure 1 on the tightening end 11, so that the tightening structure locks and flexes sling; when the lifting of the flexible sling is completed, the buckle block 52 is separated from the arc boss 43, and the spring 2 is reset, causing the slider 42 to move in the reverse direction, so that the rack structure 2 on the tightening side 41 is connected with the rack structure 2 on the tightening end 11 The rack structure is separated.

The bridge construction anti-falling flexible sling tightening structure is arranged on the sling body 7. The first sling 71 and the second sling 72 are respectively provided at both ends of the sling body 7. A plurality of protective sleeves 9 are provided in the middle of the sling body 7 to protect The cover 9 is slidingly connected to the sling body 7. A plurality of hooks 8 are fixedly arranged between the protective cover 9 and the first sling 71. The plurality of hooks 8 are evenly spaced along the sling body 7; straps are provided on the sling body 7. The hole hook 10, the first hook 71 and the second hook 72 are connected to the lower end of the hole hook 10; the lower end of the hole hook 10 is provided with a first hook 101 and a second hook 102, the first hook 101 and The heads of the second hooks 102 are respectively fixedly connected to the upper part of the hook 10 with holes. The tails of the first hooks 101 and the second hooks 102 respectively extend in opposite directions to both sides. The first hooks 101 and the second hooks 102 They are all semi-closed circles and are used to hook the first hook 71 and the second hook 72; a hinge is provided between the head and the tail of the first hook 101, and the hinge can rotate downward to connect with the first hook 101. The inner side of the tail of 101 is separated for hooking or separating from the first hook 71. A fixing member is provided between the head and the tail of the second hook 102. The fixing member includes a pick, which is connected to the head of the second hook 102. Rotately connect, and the paddle is fixedly connected to the tail of the second hook 102 through bolts for hooking up with the second hanger 72 and restricting the second hanger 72 from being separated from the tail of the second hook 102 .

The upper end of the hole hook 10 and the lower end of the connecting hook 6 are fixedly connected through a connecting head. The upper end of the connecting hook 6 is used to connect the lifting equipment hook; when the flexible sling is used, the construction worker will hook the connecting hook 6 After passing the flexible sling through the bottom of the bridge component on the hook of the hoisting equipment, the first sling 71 is hooked to the first hook 101 at the lower end of the hook 10 with holes. The construction personnel can use the flexible sling to prevent falling off during bridge construction. In the sling tightening structure, one of the tightening straps 1 is set between the hook 8 and the protective cover 9. Specifically, one of the annular holes is connected between the hook 8 and the protective cover 9, and the other tightening strap 1 is set between the hook 8 and the protective cover 9. Between the protective sleeve 9 and the second suspender 72, another specific annular hole is connected between the protective sleeve 9 and the second suspender 72, which is used to tighten the flexible sling to prevent the bridge components from falling off, and to realize the lifting of the bridge components through hoisting equipment. Lifting, thus completing the use of flexible slings.

The usage process and working principle of this device:

When the construction personnel use the flexible sling, after transporting the items that need to be hoisted to the designated location, the connecting hook 6 is hooked to the hook of the hoisting equipment hanger; the fixing member prevents the second sling 72 from being separated from the second hook. 102. Adjust the hinges to separate the first sling 71 from the first hook 101. After the flexible sling passes through the bottom of the bridge component at a suitable position, slide the protective sleeve 9 and wrap the multiple protective sleeves 9 around the bridge component respectively. The edge of the sling, adjust the hinge, and hook the first sling 71 to the first hook 101. If the bridge component is small, the hanging length of the sling body 7 between the object and the hook of the hoisting equipment is longer. According to the size of the bridge components, the hook 8 at a suitable position can be adjusted and hooked to the first hook 101, and the bridge components can be hoisted through hoisting equipment.

Before the hoisting equipment is hoisted, the construction personnel can place one end of the bridge construction anti-falling flexible sling tightening structure between the hook 8 and the protective cover 9, and the other end between the protective cover 9 and the second hanging buckle 72. The personnel pulls the control part 5 to separate it from the sliding part 4. The sliding part 4 is separated from the tightening belt 1 under the action of the spring 2. The tightening belt 1 is adjusted to separate the tightening end 11 from the fixed block 32, and the sling is The belt body 7 is placed in the annular hole. Adjust the tightening belt 1 so that the tightening end 11 is plugged into the fixed block 32. The contact end 12 can wrap the sling body 7. Release the control part 5 and the elastic force of the clip spring 55 is transmitted. The sliding member 4 is brought into contact with the sliding member 4 and pushed to slide toward the fixed block 32. The pulling spring 2 continues to extend until the sliding member 4 and the tightening end 11 engage through the toothed structure to lock and tighten. belt 1 to keep the flexible sling in a tightened state; when the flexible sling is hoisted, the construction worker can adjust the control part 5 corresponding to the tightening belt 1 between the hook 8 and the protective cover 9 to separate it from the sliding part 4. Under the elastic force of the spring 2, the sliding member 4 is moved in the opposite direction to separate the sliding member 4 from the tightening end 11. The tightening belt 1 is adjusted to separate the tightening structure from the sling body 7, making it easier for items to be connected to the flexible sling. separation.

Specific Embodiment 2 Referring to Figure 7, due to the shape limitation of the rack structure 1 and the rack structure 2 used to realize the locking or relaxing function in Embodiment 1, after the construction worker separates from the sliding member 4 by pulling the control member 5, Only by adjusting the tightening belt 1 can the locking or relaxing function of the tightening structure be realized. Therefore, the shape of the toothed structure can be changed, so that the tightening structure does not need to pull the control part when the control part 5 is in contact with the sliding part 4. 5. Directly pulling the tightening strap 1 can realize the locking function of the tightening structure, thereby allowing construction workers to quickly lock the flexible sling. The other settings of this embodiment are the same as the first embodiment.

One end of the tightening belt 1 is provided with a plurality of rack structures three evenly spaced along its length direction, the upper part of the rack structure three is provided with a slope, and a plurality of rack structures three are provided evenly spaced along its length direction on one side of the slider 42 There is a rack structure 4. The lower part of the rack structure 4 is provided with a matching slope. The rack structure 3 and the rack structure 4 have the same shape and opposite directions. When the tightening structure is used for flexible sling lifting, the control part 5 and the sliding part 4 is in contact, the construction worker can directly pull the tightening belt 1 to move in the chute 321 to shrink the annular hole until the annular hole wraps the sling body 7 to realize the fast locking function of the tightening structure; stop pulling the tightening belt 1. Rack structure three can cooperate with rack structure four to restrict the tightening belt 1 from moving in the direction of expanding the annular hole. This tightening structure prevents the flexible sling from being unstable during the hoisting process, causing bridge components to fall off, and The steps to use the tightening structure can be reduced and the construction efficiency of construction workers can be improved.

The utility model describes a bridge construction anti-falling flexible sling tightening structure that has a tightening function by being installed on the flexible sling between the bridge component and the hook. The fixed seat and the tightening strap are on the sliding part, Under the action of the control parts and springs, the tightening structure can be tightened and loosened, which facilitates the adjustment work of the construction workers. It can also tighten or loosen one end of the flexible sling to complete the assembly and unloading of the bridge components. It reduces the instability of the flexible sling during hoisting and minimizes the risk of bridge parts falling off. The device is flexible and convenient to operate, making it easy for construction workers to adjust the position on the flexible sling.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention. , substitutions and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (9)

1. An anti-falling flexible sling tightening structure for bridge construction, which is characterized in that it includes a tightening strap (1), a spring (2), a fixed seat (3), a sliding part (4) and a control part (5); The fixing seat (3) includes a placing plate (31) and a fixing block (32). Fixing blocks (32) are respectively provided at both ends of the placing plate (31). Two tightening straps (1) are symmetrically arranged, and the two tightening straps (1) are symmetrically arranged. One end of the tight belt (1) is fixedly connected to the middle part of the lower side of the fixed seat (3), and the other end is plugged into the two fixed blocks (32) respectively; the spring (2), the sliding part (4) and the control part ( 5) Two parts are provided, the two springs (2), the sliding part (4) and the control part (5) are arranged symmetrically, and the two springs (2), the sliding part (4) and the control part (5) respectively control two The tightening belt (1) is tightened or relaxed; the side parts of the two sliding parts (4) are respectively inserted into the two fixed blocks (32), and extend into the fixed blocks (32) to connect with the tightening belt (1) Through the engagement or separation of the tooth-shaped structure, the lower part of the sliding member (4) is slidingly connected to the placing plate (31); one end of each control member (5) is rotationally connected to the placing plate (31), and the other end is connected to the sliding member (4) Butt; one end of each spring (2) is fixedly connected to the placement plate (31), and the other end is fixedly connected to the side of the sliding member (4) away from the fixed block (32). 2. A bridge construction anti-falling flexible sling tightening structure according to claim 1, characterized in that the upper surface of the placement plate (31) is provided with two grooves (311), and the grooves (311) extend from The middle part of the placing plate (31) extends toward the fixing block (32). The fixing plate (313) is fixed on the groove (311). A chute (321) is provided on the fixing block (32) and is close to the placing plate (31). ) is provided with a moving groove (322) on one side, and the slide groove (321), the moving groove (322) and the groove (311) are connected and arranged. 3. A bridge construction anti-falling flexible sling tightening structure according to claim 2, characterized in that one end of the tightening strap (1) is a tightening end (11), and the other end is a contact end (12 ), a plurality of rack structures are fixedly arranged on the tightening end (11), and the plurality of rack structures are evenly spaced along the length of the tightening belt (1); the tightening end (11) passes through the chute ( 321) is plugged into the fixed block (32). 4. A bridge construction anti-falling flexible sling tightening structure according to claim 3, characterized in that the sliding member (4) includes a slider (42), one end of the slider (42) is provided with a strap On the tight side (41), an arc-shaped boss (43) is provided on the upper part of the other end. The tightening side (41) includes a plurality of rack structures 2, and the plurality of rack structures 2 are spaced apart along the length direction of the slider (42). Evenly distributed, the rack structure 2 on the tightening side (41) can extend into the inside of the fixed block (32) and mesh with the rack structure 1 on the tightening end (11). 5. A bridge construction anti-falling flexible sling tightening structure according to claim 2, characterized in that the control part (5) includes a rotating plate (51), a buckle block (52), a rotating shaft (54) and Clip spring (55), a buckle block (52) is provided on the upper part of the rotating plate (51), the rotating plate (51) and the placing plate (31) are rotationally connected through the rotating shaft (54), the clamp spring (55) is spirally wound around On the rotating shaft (54), one end of the clip spring (55) is fixedly connected to the lower part of the groove (311), and the other end is fixedly connected to the rotating plate (51). 6. A bridge construction anti-falling flexible sling tightening structure according to claim 2, characterized in that the fixed plate (313) is provided between the rotating plate (51) and the slider (42), and the One side of the spring (2) is fixedly connected to the slider (42), and the other end is fixedly connected to the fixed plate (313). 7. A kind of bridge construction anti-falling flexible sling tightening structure according to claim 1, characterized in that the bridge construction anti-falling flexible sling tightening structure is arranged on the sling body (7), and the sling body (7) 7) The first sling (71) and the second sling (72) are respectively provided at both ends, and a protective sleeve (9) is provided in the middle of the sling body (7), between the protective sleeve (9) and the first sling (71) Secure setting hook (8). 8. The anti-falling flexible sling tightening structure for bridge construction according to claim 1, characterized in that the two tightening straps (1) are connected to the two ends of the fixed seat (3) to form two annular holes. , one of the annular holes is connected between the hook (8) and the protective cover (9), and the other annular hole is connected between the protective cover (9) and the second hanging buckle (72). 9. A bridge construction anti-falling flexible sling tightening structure according to claim 4, characterized in that a plurality of rack structures are evenly spaced and arranged on the tightening belt (1), and the rack structures are three. The upper part is provided with a slope. The slider (42) is provided with a plurality of rack structures 4 evenly spaced. The lower part of the rack structure 4 is provided with matching slopes. The rack structure 3 and the rack structure 4 have the same shape and opposite directions. .