Safety device for high-place operation near edge of steel structure

Abstract

The invention discloses a safety device for steel structure edge high-place operation, and relates to the technical field of safety devices.The safety device comprises first fixing blocks, a lifting mechanism, a second rolling wheel and a positioning mechanism, the second fixing blocks are arranged on one sides of the first fixing blocks, and a steel structure body is arranged between the first fixing blocks; one end of the top of each of the first fixing block and the second fixing block is provided with a first roller, the first rollers are respectively connected with the first fixing block and the second fixing block through bolts, and a safety belt is tied and hung in a tying and hanging hole of the device, so that the tying and hanging problem of the safety belt for high-altitude edge operation of a steel structure can be solved; in the using process, the device can slide along with movement of an operator, no life rope needs to be additionally purchased or personnel do not need to be arranged, and the device is easy to mount and dismount, suitable for edge operation of the steel structure, wide in application range and capable of being repeatedly used.

Description

Technical Field

[0001] The invention relates to the technical field of safety devices, in particular to a safety device for high-place operations near the edge of a steel structure. Background Art

[0002] When working at high places near steel structures, the attachment of safety belts is one of the key measures to ensure the safety of workers. At present, the most common way to attach is to use life ropes, which are mainly composed of horizontal or vertical life lines made of steel wire ropes, basket bolts, rope clamps and other materials. However, this traditional way of tying has the following problems:

[0003] High cost: Steel wire ropes and other auxiliary materials need to be purchased in advance, which increases the project cost and is not conducive to cost control.

[0004] Insufficient reliability of hanging: Since the safety belt needs to be "hang high and use low", the hanging point of the top life rope may not meet the requirements, posing a safety hazard.

[0005] Poor visual quality: When there are many edge operations, the life rope is set to a long length, which affects the visual quality of civilized construction on site.

[0006] Safety hazards: The diameters of life ropes on the market vary, and some construction units are unable to correctly select specifications that suit site requirements, leading to safety hazards.

[0007] In summary, the existing life rope hanging method is difficult to meet the safety, efficiency and economy requirements of high-altitude operations on the edge of steel structures. Therefore, a new type of safety belt hanging facility with low cost, short setting time, strong adaptability, easy disassembly and ensuring the safety of workers is needed. Summary of the invention

[0008] In view of the deficiencies of the prior art, the present invention provides a safety device for working at heights near the edge of a steel structure, which solves the problems of the prior art mentioned in the background art, namely, high cost, insufficient reliability of hanging and potential safety hazards.

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions: A safety device for high-altitude operations on the edge of a steel structure, comprising a first fixed block, a lifting mechanism, a second roller and a positioning mechanism, a second fixed block is arranged on one side of the first fixed block, a steel structure body is arranged between the first fixed block and the first fixed block, a first roller is installed at one end of the top of the first fixed block and the second fixed block, the first roller is connected to the first fixed block and the second fixed block respectively by bolts, a lifting mechanism is arranged on the top of the first fixed block and the second fixed block, two second rollers are arranged on the top of the lifting mechanism, the lifting mechanism is used to drive the second roller to perform lifting work, the surface of the second roller is in sliding contact with the surface of the steel structure body, there is a gap between the first fixed block and the second fixed block, and a positioning mechanism is installed inside the second fixed block, the positioning mechanism is used for the overall positioning of the device, the first fixed block and the second fixed block are connected by a first bolt and a nut, a circular hole groove is arranged at one end of the bottom of the first fixed block and the second fixed block, and the first bolt is inserted into the hole groove at the bottom of the first fixed block and the second fixed block, and a plurality of the first bolts are distributed in a straight line with equal spacing.

[0010] Preferably, a strip-shaped hanging hole is provided at one end of the bottom of the first fixing block and the second fixing block, and the hanging holes at the bottom of the first fixing block and the second fixing block are used for hanging safety ropes, and the top of the hanging hole at the bottom of the first fixing block is threadedly connected to a fixing bolt, and two fixing bolts are provided, and one end of the bottom of the fixing bolt is made of rubber material, and one end of the top of the fixing bolt is located inside the rectangular through hole at the bottom of the first fixing block. The provision of the fixing bolt further enhances the stability of the hanging hole, and the fixing bolt is fixed to the bottom of the first fixing block by a threaded connection, and its rubber bottom can increase friction to prevent the safety rope from loosening or slipping during the hanging process, thereby ensuring the safety of the operators when working at heights, and the threaded connection method of the fixing bolt makes the installation and disassembly of the safety rope more convenient, and the operators can quickly tighten or loosen the bolts with simple tools (such as a wrench) to complete the fixing or removal of the safety rope, thereby greatly improving work efficiency.

[0011] Preferably, a hole groove is formed at one end of the first bolt, and a pin is inserted into the hole groove at the end of the first bolt, a second bolt is arranged below the first bolt, and two second bolts are arranged, and the outer walls of the two second bolts are threadedly connected to the first fixing block, and the other end of the second bolt is tightly fitted with one side of the bottom of the second fixing block, and the first bolt is initially fixed by the hole groove and the pin at its end, and the second bolt further enhances the fixing effect by threaded connection. This double fixing method makes the connection between the first fixing block and the second fixing block more secure, and can effectively resist the influence of external forces (such as movement of operators, wind or other accidental impacts) on the stability of the device. Through the auxiliary fixation of the second bolt, the device can better withstand the stress under various complex working conditions when operating at height, reducing the safety hazards caused by loose connections.

[0012] Preferably, the top ends of the first and second fixed blocks are in a C-shaped structure, and the inner walls of the first and second fixed blocks are provided with rollers, the rollers are arranged vertically, and the top and bottom ends of the rollers are rotatably connected to the first connecting block and the second connecting block respectively, the rollers are distributed in a straight line with equal spacing, the surfaces of the rollers are rotatably connected to the bottom sides of the steel structure body, and the top ends of the first and second fixed blocks are in a C-shaped structure. This design enables the device to better fit the shape of the steel structure body, thereby providing more stable support. The C-shaped structure can effectively wrap the bottom sides of the steel structure body to prevent the device from lateral displacement or shaking during use. The rollers are arranged vertically and rotatably connected to the bottom sides of the steel structure body, allowing the device to slide smoothly on the steel structure body, while reducing friction, reducing the wear of the device during movement, and extending its service life.

[0013] Preferably, the lifting mechanism includes a lifting plate, a guide block is welded at the bottom of the lifting plate, a slider is arranged at the bottom of the guide block, two sliders are arranged, and the bottom surfaces of the two sliders are respectively in sliding contact with the top of the first fixed block and the second fixed block, one end of the slider is rotatably connected to the end of the first adjusting bolt, the first adjusting bolt is internally threadedly connected to the third fixed block, and two third fixed blocks are arranged, and the two third fixed blocks are respectively welded to the top of the first fixed block and the second fixed block, so that the lifting plate can move up and down on the surface of the fixed block, thereby realizing height adjustment, and by rotating the first adjusting bolt, the slider can be driven to move along the slope of the guide block, and when the slider moves upward, it will push the guide block and the lifting plate to rise, thereby realizing the height adjustment of the second roller, providing a flexible height adjustment function so that it can adapt to steel structure bodies of different heights.

[0014] Preferably, the guide block is in a wedge-shaped structure, and the bottom of the guide block is in a sloped structure, the bottom surface of the guide block fits with the top surface of the slider, and the top of the slider is in a sloped structure. The guide block is in a wedge-shaped structure, and its bottom is a sloped structure. The top of the slider is also designed to be sloped, and the surfaces of the two fit with each other, so that when the slider moves horizontally, it can convert horizontal force into vertical force through the interaction of the slopes, thereby pushing the guide block and the lifting plate to move up and down. Through the interaction of the slopes, the small horizontal movement of the slider can be converted into a larger vertical displacement. The application of this lever principle makes lifting operations more labor-saving and efficient.

[0015] Preferably, holes and grooves are provided at the four ends of the lifting plate, and the inside of the holes and grooves at the four ends of the lifting plate are in sliding contact with the outer wall of the sliding rod. The bottom end of the sliding rod is respectively welded to the top of the first fixed block and the second fixed block. A spring is mounted on the outside of the bottom end of the sliding rod, and a limit block is provided on the top of the spring. The limit block is welded to the top end of the sliding rod, which provides a stable vertical guide for the lifting plate; ensures that the lifting plate always maintains a linear motion during the up and down movement to avoid instability caused by deviation or shaking; the limit block is welded to the top of the sliding rod to prevent the lifting plate from separating from the sliding rod during the rising process, thereby playing a role of limit protection; effectively avoids damage to the device or functional failure caused by excessive rising of the lifting plate.

[0016] Preferably, the positioning mechanism includes a base plate, which is provided with two base plates, the bottoms of the two base plates are respectively welded to the inside of the first fixed block and the second fixed block, the two ends of the top of the base plate are rotatably connected to the bottom of the worm gear, one end of the top of the worm gear is threadedly connected to the bottom of the connecting column, one end of the top of the connecting column is welded to the top plate, one side of the worm gear is meshed with a worm, both ends of the worm are rotatably connected to both ends of the base plate, a turntable is welded to the end of the worm, and the worm gear transmission has the characteristics of self-locking and high precision, and can achieve fine-tuning and stable positioning; through the rotation of the turntable, the lifting and lowering of the top plate can be accurately controlled to ensure that the device is firmly fixed on the steel structure, and the design of the positioning mechanism ensures that the device can be fixed at any position on the surface of the steel structure body during use, thereby facilitating operation.

[0017] Preferably, a rubber pad is provided on the top of the top plate, and the bottom of the rubber pad is bonded to the surface of the top plate. Telescopic rods are provided at the four ends of the top plate, and one end of the top of the telescopic rod is welded to the top plate, and one end of the bottom of the telescopic rod is welded to the bottom plate. By arranging the rubber pad on the top of the top plate and the telescopic rod between the top plate and the bottom plate, this design further optimizes the function of the positioning mechanism, the rubber pad increases friction and cushioning, and protects the steel structure and the device itself; the telescopic rod provides stable support and plays a role in stroke limiting.

[0018] The present invention provides a safety device for high-altitude operations near the edge of a steel structure. It has the following beneficial effects:

[0019] (1) A safety device for working at a height near the edge of a steel structure, wherein a first fixing block and a second fixing block are placed under the main body of the steel structure and interlocked with each other so that a first roller inside the device can be supported on the surface of the main body of the steel structure; then, a first bolt is inserted into a hole groove at the bottom of the first fixing block and the second fixing block, and a nut at one end of the first bolt is tightened to achieve connection between the first fixing block and the bottom of the second fixing block; the second bolt is further tightened so that one end of the second bolt abuts against one side of the second fixing block, thereby ensuring a stable and firm connection between the first fixing block and the second fixing block; after completing the above operations, a safety belt is fastened to the fastening hole of the device, thereby solving the problem of fastening a safety belt when working at a height near the edge of a steel structure; the device can slide with the movement of the operator during use, without the need to purchase an additional life rope or arrange personnel to set it up; the installation and disassembly operations are simple, and the device is suitable for working at the edge of a steel structure, has a wide range of uses, and can be used repeatedly.

[0020] (2) A safety device for working at heights near the edge of a steel structure. During use of the device, the slider can be driven to move by rotating the first adjusting bolt. When the slider moves, it comes into sliding contact with the bottom slope of the guide block, and with the help of the oblique force of the slope, the guide block is pushed upward. The upward movement of the guide block drives the lifting plate connected to it to move upward synchronously, thereby pushing the second roller to lift upward. When the second roller moves upward and contacts the surface of the steel structure, the top of the device is stably supported by the second roller, thereby effectively preventing the device from moving up and down during use, and significantly improving the stability of the device during movement.

[0021] (3) This safety device for working at heights near the edge of a steel structure can drive the worm to rotate by rotating the turntable, and the rotation of the worm can also drive the worm wheel to rotate, so that the worm wheel can drive the connecting column to move upward through the thread at one end of the top, so that the connecting column can drive the top plate to move upward, and the rubber pad on the top of the top plate can resist the surface of the steel structure body, so that the device can be fixed and positioned on the surface of the steel structure, greatly improving the convenience of use.

[0022] Thereby, the problems of high cost, insufficient reliability and potential safety hazards of the prior art are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a front view structural schematic diagram of the present invention;

[0025] Figure 3 This is a schematic diagram of the installation of the present invention;

[0026] Figure 4 It is a side view structural schematic diagram of the present invention;

[0027] Figure 5 It is a schematic diagram of the internal structure of the present invention;

[0028] Figure 6 For the present invention Figure 5 The enlarged structural diagram at A in the middle;

[0029] Figure 7 It is a schematic diagram of the lifting mechanism structure of the present invention;

[0030] Figure 8 This is a schematic diagram of the guide block structure of the present invention;

[0031] Fig. 9 It is a schematic diagram of the roller structure of the present invention.

[0032] In the figure, 1, the first fixed block; 2, the second fixed block; 3, the first roller; 4, the lifting mechanism; 401, the third fixed block; 402, the first adjusting bolt; 403, the slider; 404, the guide block; 405, the slide bar; 406, the spring; 407, the limit block; 408, the lifting plate; 5, the second roller; 6, the positioning mechanism; 601, the bottom plate; 602, the telescopic rod; 603, the top plate; 604, the rubber pad; 605, the connecting column; 606, the worm gear; 607, the worm; 608, the turntable; 7, the first bolt; 8, the second bolt; 9, the hanging hole; 10, the tightening bolt; 11, the steel structure body; 12, the roller. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-5The embodiment of the present invention provides a technical solution: a safety device for working at a high place on the edge of a steel structure, comprising a first fixed block 1, a lifting mechanism 4, a second roller 5 and a positioning mechanism 6, a second fixed block 2 is arranged on one side of the first fixed block 1, a steel structure body 11 is arranged between the first fixed block 1 and the first fixed block 1, a first roller 3 is installed on one end of the top of the first fixed block 1 and the second fixed block 2, the first roller 3 is respectively connected to the first fixed block 1 and the second fixed block 2 by bolts, a lifting mechanism 4 is arranged on the top of the first fixed block 1 and the second fixed block 2, two second rollers 5 are arranged on the top of the lifting mechanism 4, the lifting mechanism 4 is used to drive the second roller 5 to lift, the surface of the second roller 5 is in sliding contact with the surface of the steel structure body 11, there is a gap between the first fixed block 1 and the second fixed block 2, and the positioning mechanism 6 is installed inside the second fixed block 2, the positioning mechanism 6 is used for the overall positioning of the device, the first fixed block 1 and the second fixed block 2 are connected by the first bolt 7 and nuts, a circular hole groove is provided at one end of the bottom of the first fixing block 1 and the second fixing block 2, and the first bolt 7 is inserted into the hole groove at the bottom of the first fixing block 1 and the second fixing block 2, and a plurality of first bolts 7 are distributed in a straight line with equal spacing; a strip-shaped hanging hole 9 is provided at one end of the bottom of the first fixing block 1 and the second fixing block 2, and the hanging hole 9 at the bottom of the first fixing block 1 and the second fixing block 2 is used to hang a safety rope, and the top of the hanging hole 9 at the bottom of the first fixing block 1 is threadedly connected with a fixing bolt 10, two fixing bolts 10 are provided, and one end of the bottom of the fixing bolt 10 is made of rubber, and the top end of the fixing bolt 10 is located inside the rectangular through hole at the bottom of the first fixing block 1; a hole groove is provided at one end of the first bolt 7, and a latch is inserted into the hole groove at the end of the first bolt 7, a second bolt 8 is provided below the first bolt 7, and two second bolts 8 are provided, and the outer walls of the two second bolts 8 are threadedly connected to the first fixing block 1, and the other end of the second bolt 8 is tightly fitted with one side of the bottom of the second fixing block 2;The top ends of the first fixing block 1 and the second fixing block 2 are in a C-shaped structure, and rollers 12 are arranged on the inner walls of the first fixing block 1 and the second fixing block 2. The rollers 12 are arranged vertically, and the top ends and the bottom ends of the rollers 12 are rotatably connected to the first connecting block and the second connecting block respectively. The rollers 12 are distributed in a straight line with equal spacing, and the surfaces of the rollers 12 are rotatably connected to the bottom sides of the steel structure body 11. When the device is used, the first fixing block 1 and the second fixing block 2 are placed under the steel structure body 11 for buckling, so that the first roller 3 inside the device can be supported on the surface of the steel structure body 11, and then the first bolt 7 is inserted into the first fixing block 1 and The hole groove at the bottom of the second fixing block 2 is then tightened by tightening the nut at one end of the first bolt 7, so that the bottom of the first fixing block 1 and the second fixing block 2 can be connected. By tightening the second bolt 8, one end of the second bolt 8 can be against one side of the second fixing block 2, so that the first fixing block 1 and the second fixing block 2 can be stably and firmly connected. Then the safety belt is hung in the hanging hole 9, and the problem of hanging the safety belt for high-altitude edge operations of steel structures can be solved. When in use, it can slide with the movement of the operator, and there is no need to purchase a life rope and arrange personnel to set it up. It is simple to install and disassemble, suitable for edge operations of steel structures, has a wide range of uses, and can be used repeatedly. ;

[0035] Embodiment 2:

[0036] The embodiment of the present invention provides a technical solution: a safety device for working at a high place on the edge of a steel structure, wherein the lifting mechanism 4 comprises a lifting plate 408, a guide block 404 is welded at the bottom of the lifting plate 408, a slider 403 is arranged at the bottom of the guide block 404, two sliders 403 are arranged, the bottom surfaces of the two sliders 403 are respectively in sliding contact with the top of the first fixed block 1 and the second fixed block 2, one end of the slider 403 is rotatably connected to the end of the first adjusting bolt 402, the first adjusting bolt 402 is internally threadedly connected to the third fixed block 401, two third fixed blocks 401 are arranged, and the two third fixed blocks 401 are respectively welded to the top of the first fixed block 1 and the second fixed block 2; the guide block 404 is a wedge-shaped structure, and the bottom of the guide block 404 is a slope-shaped structure, the bottom surface of the guide block 404 is matched with the top surface of the slider 403, and the top of the slider 403 is a slope-shaped structure; the four ends of the lifting plate 408 are provided with holes and grooves, and the inside of the hole grooves at the four ends of the lifting plate 408 slides with the outer wall of the slide rod 405 The first and second fixing blocks 404 are in contact with each other, and one end of the bottom of the slide bar 405 is welded to the top of the first fixing block 1 and the second fixing block 2 respectively. A spring 406 is mounted on the outside of one end of the bottom of the slide bar 405. A limit block 407 is arranged on the top of the spring 406. The limit block 407 is welded to one end of the top of the slide bar 405. When the device is in use, the first adjusting bolt 402 is rotated to enable the first adjusting bolt 402 to drive the slide block 403 to move. When the slide block 403 moves, it can make sliding contact with the guide block 404, so that the slide block 403 can push the guide block 404 upward through the slope at the bottom of the guide block 404. When the guide block 404 pushes upward, it can drive the lifting plate 408 to move upward, so that the lifting plate 408 can push the second roller 5 upward. When the second roller 5 pushes upward, it can contact the surface of the steel structure, so that when the device is in use, the top is supported by the second roller 5 and will not move up and down, thereby greatly improving the stability of the movement of the device.

[0037] Embodiment 3:

[0038] The embodiment of the present invention provides a technical solution: a safety device for working at a height near an edge of a steel structure, wherein the positioning mechanism 6 comprises a bottom plate 601, two bottom plates 601 are provided, the bottoms of the two bottom plates 601 are respectively welded to the inside of the first fixing block 1 and the second fixing block 2, the two ends of the top of the bottom plate 601 are rotatably connected to the bottom of a worm gear 606, one end of the top of the worm gear 606 is threadedly connected to the bottom of a connecting column 605, one end of the top of the connecting column 605 is welded to a top plate 603, one side of the worm gear 606 is meshed with a worm 607, the two ends of the worm 607 are rotatably connected to the two ends of the bottom plate 601, and a turntable 608 is welded to the end of the worm 607; a rubber pad 604 is provided on the top of the top plate 603, and the bottom of the rubber pad 604 is mutually connected with the surface of the top plate 603 The top plate 603 is bonded together, and telescopic rods 602 are arranged at the four ends of the top plate 603. The top end of the telescopic rod 602 is welded to the top plate 603, and the bottom end of the telescopic rod 602 is welded to the bottom plate 601. By rotating the turntable 608, the turntable 608 can drive the worm 607 to rotate. The rotation of the worm 607 can drive the worm wheel 606 to rotate, so that the worm wheel 606 can drive the connecting column 605 to move upward through the thread at the top end, so that the connecting column 605 can drive the top plate 603 to move upward, and then the rubber pad 604 on the top of the top plate 603 can resist the surface of the steel structure body 11, so that the device can be fixed, thereby being positioned on the surface of the steel structure, which greatly improves the convenience of use.

[0039] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A safety device for working at heights near the edge of a steel structure, characterized in that: The invention comprises a first fixed block (1), a lifting mechanism (4), a second roller (5) and a positioning mechanism (6); a second fixed block (2) is arranged on one side of the first fixed block (1); a steel structure body (11) is arranged between the first fixed block (1) and the first fixed block (1); a first roller (3) is installed on one end of the top of each of the first fixed block (1) and the second fixed block (2); the first roller (3) is connected to the first fixed block (1) and the second fixed block (2) respectively by bolts; a lifting mechanism (4) is arranged on the top of the first fixed block (1) and the second fixed block (2); two second rollers (5) are arranged on the top of the lifting mechanism (4); the lifting mechanism (4) is used to drive The second roller (5) is driven to perform lifting work, the surface of the second roller (5) is in sliding contact with the surface of the steel structure body (11), there is a gap between the first fixing block (1) and the second fixing block (2), and a positioning mechanism (6) is installed inside the second fixing block (2), and the positioning mechanism (6) is used for the overall positioning work of the device, the first fixing block (1) and the second fixing block (2) are connected by a first bolt (7) and a nut, a circular hole groove is provided at one end of the bottom of the first fixing block (1) and the second fixing block (2), and the first bolt (7) is inserted into the hole groove at the bottom of the first fixing block (1) and the second fixing block (2), and a plurality of the first bolts (7) are distributed in a straight line with equal spacing.

2. A safety device for working at heights near the edge of a steel structure according to claim 1, characterized in that: A strip-shaped hanging hole (9) is provided at one end of the bottom of each of the first fixing block (1) and the second fixing block (2). The hanging holes (9) at the bottom of each of the first fixing block (1) and the second fixing block (2) are used to hang a safety rope, and the top of the hanging hole (9) at the bottom of the first fixing block (1) is threadedly connected to a fixing bolt (10). Two fixing bolts (10) are provided, and one end of the bottom of the fixing bolt (10) is made of rubber. The top end of the fixing bolt (10) is located inside the rectangular through hole at the bottom of the first fixing block (1).

3. A safety device for working at heights near the edge of a steel structure according to claim 1, characterized in that: A hole groove is formed at one end of the first bolt (7), and a latch is inserted into the hole groove at the end of the first bolt (7). A second bolt (8) is arranged below the first bolt (7). Two second bolts (8) are arranged. The outer walls of the two second bolts (8) are threadedly connected to the first fixing block (1), and the other end of the second bolt (8) is tightly fitted to one side of the bottom of the second fixing block (2).

4. A safety device for working at heights near the edge of a steel structure according to claim 1, characterized in that: The top ends of the first fixing block (1) and the second fixing block (2) are in a C-shaped structure. The inner walls of the first fixing block (1) and the second fixing block (2) are provided with rollers (12). The rollers (12) are arranged vertically, and the top ends and the bottom ends of the rollers (12) are rotatably connected to the first connecting block and the second connecting block respectively. The rollers (12) are distributed in a straight line with equal spacing, and the surfaces of the rollers (12) are rotatably connected to the two sides of the bottom of the steel structure body (11).

5. According to claim 1, a safety device for working at heights near the edge of a steel structure is characterized by: The lifting mechanism (4) comprises a lifting plate (408), a guide block (404) is welded at the bottom of the lifting plate (408), a slider (403) is arranged at the bottom of the guide block (404), two sliders (403) are arranged, the bottom surfaces of the two sliders (403) are respectively in sliding contact with the top of the first fixed block (1) and the second fixed block (2), one end of the slider (403) is rotatably connected to the end of the first adjusting bolt (402), the first adjusting bolt (402) is internally threadedly connected to the third fixed block (401), two third fixed blocks (401) are arranged, and the two third fixed blocks (401) are respectively welded to the top of the first fixed block (1) and the second fixed block (2).

6. A safety device for working at heights near the edge of a steel structure according to claim 5, characterized in that: The guide block (404) is in a wedge-shaped structure, and the bottom of the guide block (404) is in a sloped structure. The bottom surface of the guide block (404) fits with the top surface of the slider (403), and the top of the slider (403) is in a sloped structure.

7. A safety device for working at heights near the edge of a steel structure according to claim 5, characterized in that: The lifting plate (408) is provided with holes and grooves at the four ends, and the inside of the holes and grooves at the four ends of the lifting plate (408) is in sliding contact with the outer wall of the sliding rod (405). The bottom end of the sliding rod (405) is respectively welded to the top of the first fixed block (1) and the second fixed block (2). The bottom end of the sliding rod (405) is externally sleeved with a spring (406), and the top of the spring (406) is provided with a limit block (407), and the limit block (407) is welded to the top end of the sliding rod (405).

8. The safety device for working at heights near the edge of a steel structure according to claim 1, characterized in that: The positioning mechanism (6) comprises a base plate (601), wherein two base plates (601) are provided, and the bottoms of the two base plates (601) are respectively welded to the inside of the first fixed block (1) and the second fixed block (2), and the two ends of the top of the base plate (601) are rotatably connected to the bottom of the worm gear (606), and one end of the top of the worm gear (606) is threadedly connected to the bottom of the connecting column (605), and one end of the top of the connecting column (605) is welded to the top plate (603), and one side of the worm gear (606) is meshed with a worm (607), and the two ends of the worm (607) are rotatably connected to the two ends of the base plate (601), and a rotating disk (608) is welded to the end of the worm (607).

9. A safety device for working at heights near the edge of a steel structure according to claim 8, characterized in that: A rubber pad (604) is arranged on the top of the top plate (603), and the bottom of the rubber pad (604) is bonded to the surface of the top plate (603). Telescopic rods (602) are arranged at four ends of the top plate (603), and one end of the top of the telescopic rod (602) is welded to the top plate (603), and one end of the bottom of the telescopic rod (602) is welded to the bottom plate (601).

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