Scaffold with safety anti-fall mechanism

Abstract

The present invention belongs to the field of attached scaffolding, and specifically relates to a scaffold with a safety anti-falling mechanism; it comprises a lifting frame, a guide wheel assembly, and an L-shaped bracket; the L-shaped bracket comprises a vertical frame body and a horizontal frame body that are perpendicular to each other, the horizontal frame body comprises two supporting cross bars that are installed in opposite directions and spaced in the middle; a swingable anti-falling plate is connected in the middle of the two supporting cross bars by a first rotating shaft, the anti-falling plate comprises an upper plate and a lower plate connected at an obtuse angle, the corners of the upper plate and the lower plate are connected to the first rotating shaft, the anti-falling plate swings, and both the upper plate and the lower plate can be inserted between the stop bars of the lifting frame, and the anti-falling plate connecting spring keeps the lower plate within the range of the stop bars of the lifting frame; a limit rod is fixed in the middle of the two supporting cross bars, and when the lifting frame falls suddenly, the stop bar hits the lower plate, causing the anti-falling plate to swing greatly, and after the upper plate inserts between the stop bars of the lifting frame, it stops at the limit rod, and the lifting frame is prevented from falling; when the lifting frame rises or falls slowly, the stop bar pushes the lower plate away, and the anti-falling plate resets after a small swing.

Description

Technical Field

[0001] The invention belongs to the field of attached scaffolds, and in particular relates to a scaffold with a safety anti-falling mechanism. Background Art

[0002] Attached lifting scaffolding is a new type of scaffolding technology that developed rapidly at the beginning of this century and has had a significant impact on the advancement of construction technology in my country. It transforms suspended work into work inside the scaffold, boasting significant low-carbon characteristics, high technological content, and greater economics, safety, and convenience.

[0003] Existing lifting scaffolds use electric devices for lifting. If the electric device fails, the lifting scaffold faces the risk of falling, which can easily put construction workers in danger. Improving the anti-fall performance of the lifting scaffold is of great help to safe construction.

[0004] Furthermore, during construction, as the scaffolding is located close to the main structure, sand, ash, or other building materials inevitably fall onto its upper surface, accelerating corrosion of the connecting components and hindering subsequent disassembly. Attached scaffolding is secured to the building wall via connecting screws and fastening nuts. Therefore, the reliability of the fastening nuts is directly related to the safety of the entire scaffolding. Existing technologies lack the necessary safety measures.

[0005] In order to solve the above problems, the present invention proposes a scaffold with a safety anti-falling mechanism. Summary of the Invention

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art, meet practical needs, and provide a scaffold with a safety anti-falling mechanism to solve the above technical problems.

[0007] The present invention provides the following technical solution: a scaffold with a safety anti-fall mechanism, comprising a lifting frame, a guide wheel assembly clamped on the lifting frame and slidable relative to the lifting frame, an L-shaped bracket for supporting the guide wheel assembly, a connecting screw connected to the vertical frame body of the L-shaped bracket, and a fastening nut screwed into the connecting screw to prevent it from being separated from the vertical frame body;

[0008] The cam is secured to the bottom of the L-shaped frame and is adapted to engage the lift frame when the cam is engaged.

[0009] Furthermore, it also includes a scraper, a sliding plate and two guide rods; a guide groove is provided on the opposite sides of the two supporting cross bars, and the scraper spans the two supporting cross bars and is slidably clamped on the horizontal frame through the cooperation of the rolling wheels on both sides and the guide groove;

[0010] The sliding plate is located between the supporting cross bars and is fixedly connected to the scraper; two guide rods are arranged one on the left and one on the right between the two supporting cross bars, and are connected as a whole through the support blocks at the ends, and the support blocks are fixed on the vertical frame; the guide rods are parallel to the supporting cross bars, and the guide holes of the sliding plate slide in conjunction with the guide rods, and a second spring is sleeved on the guide rods between the sliding plate and the support blocks; the upper plate of the anti-fall plate is backed against the sliding plate, and the first spring is connected between the lower plate of the anti-fall plate and the sliding plate; the upper plate is longer than the lower plate, and the lifting frame rises or falls slowly. When the anti-fall plate swings slightly, the upper plate pushes the sliding plate to slide, and the scraper performs a scraping action.

[0011] Furthermore, it also includes an anti-loosening component, which includes a lifting rod, which is connected to the L-shaped bracket through a vertical guide mechanism, a push plate is connected between the lifting rod and the sliding plate, and the lateral movement of the sliding plate is converted into a thrust for the lifting rod to move downward by the push plate. A reset mechanism is also provided between the lifting rod and the vertical guide mechanism, so that the lifting rod automatically bounces up after being pressed down; the upper end of the lifting rod is connected to a swingable protective shell, the protective shell is sleeved on the outer ring of the fastening nut, and a fourth spring is provided between the protective shell and the lifting rod to cause the protective shell to swing to one side, and the protective shell is vertically arranged on the inner wall near the fastening nut.

[0012] A direction-changing assembly is provided on the outside of the protective shell; the direction-changing assembly includes a pad and a U-shaped plate. The U-shaped plate is integrated with the protective shell, and the pad is located between the protective shell, the U-shaped plate, and the vertical frame. The pad is fixedly connected to the vertical frame and is in sliding contact with the protective shell and the U-shaped plate. The bottom of the U-shaped plate is open, and a partition is provided in the middle. The partition divides the U-shaped plate into left and right slides. The upper parts of the left and right slides are connected. A guide shaft is fixed to the pad, and the guide shaft can slide between the left and right slides.

[0013] A one-way block is hinged in the open inclined slot at the top of the partition, and a fifth spring is provided between the one-way block and the open inclined slot. The fifth spring drives the one-way block to deviate to the slide on the right side, and its top is the downslope surface from the slide on the right side to the slide on the left side, and the bottom end of the partition is the upslope surface from the slide on the left side to the slide on the right side; when the U-shaped plate moves downward with the protective shell, the guide shaft moves relatively along the slide on the right side to the one-way block and passes over the one-way block. When the U-shaped plate moves upward with the protective shell, the guide shaft is guided by the one-way block into the slide on the left side, so that the toggle teeth of the protective shell leave the fastening nut. After the guide shaft disengages from the slide on the left, the fourth spring resets the protective shell, and the guide shaft returns to the slide exit on the right side again.

[0014] Furthermore, the top of the sliding plate is connected to two horizontal guide frames through a bending portion, and the two guide frames have sliding grooves parallel to the guide rods on the facing sides. The sliding rods on the push plate extend into the sliding grooves to enable the push plate to be slidably connected to the guide frames.

[0015] Furthermore, a first baffle extends horizontally from the lifting rod, a U-shaped notch at the lower end of the push plate is sleeved on the lifting rod and pressed against the top of the first baffle, and a second baffle seal is provided at the opening of the U-shaped notch.

[0016] Furthermore, a guide sleeve is fixed on the transverse frame, the lifting rod is movably inserted into the vertical guide hole of the guide sleeve, and a third spring is provided between the lower end of the lifting rod and the bottom of the guide hole.

[0017] Furthermore, the protective shell forms a box body that encloses the fastening nut, a swing groove is opened at the lower end of the protective shell, the lifting rod is passed through the swing groove, and a connecting rod is provided at the upper end of the protective shell, which is connected to a detachable guard plate through the connecting rod to close its opening.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] 1. The scraper automatically removes construction waste, such as sand and dust, from the upper surface of the horizontal support. Simultaneously, the toggle teeth apply a clockwise toggle to the fastening nut, keeping it locked at all times and preventing vibrations from the building structure causing it to loosen, potentially preventing any unforeseen dangers. Furthermore, the protective shell shields the fastening nut from sun and rain, preventing premature rust that could hinder disassembly.

[0020] 2. By setting the direction-changing component, when the protective shell moves down, the toggle teeth are always close to the outer side of the fastening nut. When the protective shell is raised, the toggle teeth can maintain a certain distance from the fastening nut.

[0021] 3. The setting of the guard plate can protect the internal fastening bolts from sun and rain and avoid corrosion of building materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 Schematic diagram of the installation of the sliding plate;

[0024] Figure 3 This is a schematic diagram of the installation of the anti-fall plate;

[0025] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0026] Figure 5 for Figure 3 Enlarged view of point B in the middle;

[0027] Figure 6 Schematic diagram of the structure of the protective shell;

[0028] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0029] Figure 8 This is a schematic diagram of the scraper installation;

[0030] Figure 9 for Figure 8 Enlarged view of point D in the middle;

[0031] Figure 10 This is a schematic diagram of the protective shell assembly.

[0032] In the figure: 1-lifting frame; 2-guide wheel assembly; 3-L-shaped bracket; 31-support crossbar; 311-guide groove; 32-vertical frame; 33-bending part; 34-guide frame; 35-slide groove; 36-slide rod; 4-connecting screw; 5-fastening nut; 6-rolling wheel; 7-scraper; 8-slide plate; 9-guide rod; 10-first rotating shaft; 11-anti-fall plate; 12-first spring; 13-support block; 14-second spring; 15-relaxation assembly; 151-guide sleeve; 152-lifting rod; 1521-first gear lever; 15 3-third spring; 1531-swinging groove; 1532-connecting rod; 1533-guard plate; 154-fourth spring; 155-sliding tooth; 156-direction changing assembly; 1561-pad; 1562-U-shaped plate; 1563-partition; 1564-one-way assembly; 15641-second rotating shaft; 15642-opening inclined groove; 15643-one-way block; 15644-fifth spring; 1565-guide shaft; 157-protective shell; 16-push plate; 161-U-shaped notch; 162-second gear lever; 17-limiting rod. DETAILED DESCRIPTION

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] like Figure 1 、 Figure 2 、 Figure 8 As shown: A scaffold with a safety anti-fall mechanism, including a lifting frame 1, a guide wheel assembly 2 clamped on the lifting frame 1 and slidable relative to it, an L-shaped bracket 3 for supporting the guide wheel assembly 2, a connecting screw 4 connected to the vertical frame body 32 of the L-shaped bracket 3, and a fastening nut 5 screwed with the connecting screw 4 to prevent it from detaching from the vertical frame body.

[0035] The L-shaped bracket 3 includes a vertical frame 32 and a horizontal frame that are perpendicular to each other. The horizontal frame includes two support cross bars 31 installed in opposite directions and spaced apart in the middle. One end of the support cross bar 31 is connected to the vertical frame 32 and the other end is connected to the guide wheel assembly 2; the middle of the two support cross bars 31 is connected to a swingable anti-fall plate 11 through a first rotating shaft 10, and the anti-fall plate 11 includes an upper plate and a lower plate connected at an obtuse angle, the obtuse angle facing the lifting frame 1, and the corners of the upper plate and the lower plate are connected to the first rotating shaft 10. The anti-fall plate 11 swings, and the upper plate and the lower plate are both It can be inserted between the stop bars of the lifting frame 1, and the anti-fall plate 11 is connected to the spring to keep the lower plate within the stop bar range of the lifting frame 1; a limit rod 17 is fixed between the two supporting cross bars 31, and the limit rod 17 is located in the swing direction of the upper plate toward the lifting frame 1. When the lifting frame 1 falls sharply, the stop bar hits the lower plate, causing the anti-fall plate 11 to swing greatly. After the upper plate penetrates between the stop bars of the lifting frame 1, it stops at the limit rod 17, and the lifting frame 1 is prevented from falling; when the lifting frame 1 rises or falls slowly, the stop bar pushes the lower plate away, and the anti-fall plate 11 swings slightly and then resets.

[0036] like Figure 2 、 Figure 3 、 Figure 8 As shown: it also includes a scraper 7, a sliding plate 8 and two guide rods 9; a guide groove 311 is provided on the opposite side of the two supporting cross bars 31, and the scraper 7 spans the two supporting cross bars 31 and is slidably clamped on the horizontal frame through the rolling wheels 6 on both sides and the guide groove 311.

[0037] The sliding plate 8 is located between the supporting cross bars 31 and is fixedly connected to the scraper 7; two guide rods 9 are arranged one on the left and one on the right between the two supporting cross bars 31, and are connected as a whole through the support blocks 13 at the ends, and the support blocks 13 are fixed on the vertical frame 32; the guide rods 9 are parallel to the supporting cross bars 31, and the guide holes of the sliding plate 8 slide in conjunction with the guide rods 9, and a second spring 14 is sleeved on the guide rods 9 between the sliding plate 8 and the support blocks 13; the upper plate of the anti-fall plate 11 is backed against the sliding plate 8, and the first spring 12 is connected between the lower plate of the anti-fall plate 11 and the sliding plate 8; the upper plate is longer than the lower plate, and the lifting frame 1 rises or falls slowly. When the anti-fall plate 11 swings slightly, the upper plate pushes the sliding plate 8 to slide, and the scraper 7 performs a scraping action.

[0038] like Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 10 As shown, the anti-loosening assembly 15 also includes a lifting rod 152. A guide sleeve 151 is fixed to the horizontal frame. The lifting rod 152 is movably inserted into the vertical guide hole of the guide sleeve 151. A third spring 153 is installed between the lower end of the lifting rod 152 and the bottom of the guide hole. A push plate 16 is connected between the lifting rod 152 and the sliding plate 8. The push plate 16 converts the lateral movement of the sliding plate 8 into a thrust for the lifting rod 152 to move downward. The third spring 153 causes the lifting rod 152 to automatically rebound after being pressed downward. The upper end of the lifting rod 152 is connected to a swingable protective shell 157. The protective shell 157 is mounted on the outer ring of the fastening nut 5. A fourth spring 154 is installed between the protective shell 157 and the lifting rod 152 to bias the protective shell 157 to one side. The inner wall of the protective shell 157 near the fastening nut 5 is vertically arranged with toggle teeth 155.

[0039] The toggle teeth 155 on the inner side wall of the protective shell 157 are always pressed against the side of the fastening nut 5 under the action of the fourth spring 154. Then, when the lifting rod 152 drives the protective shell 157 to move downward, the toggle teeth 155 will achieve a clockwise toggle effect on the fastening nut 5. Every time the lifting rod 152 drives the protective shell 157 to move downward, the toggle teeth 155 will achieve a tightening effect on the fastening nut 5. Then, the fastening nut 5 can be kept in a fastened state at all times, avoiding the fastening nut 5 from being loosened due to the vibration transmitted during the construction process, and thus avoiding the danger caused by the loosening of the fastening nut 5.

[0040] A direction-changing assembly 156 is provided on the outside of the protective shell 157; the direction-changing assembly 156 includes a pad 1561 and a U-shaped plate 1562. The U-shaped plate 1562 is connected to the protective shell 157 as a whole. The pad 1561 is located between the protective shell 157, the U-shaped plate 1562 and the vertical frame 32. The pad 1561 is fixedly connected to the vertical frame 32 and is in sliding contact with the protective shell 157 and the U-shaped plate 1562; the U-shaped plate 1562 is open at the bottom and is provided with a partition 1563 in the middle. The partition 1563 divides the U-shaped plate 1562 into left and right slides. The upper parts of the left and right slides are connected. A guide shaft 1565 is fixed on the pad 1561, and the guide shaft 1565 can slide between the left and right slides.

[0041] The U-shaped plate 1562 moves downward as the protective shell 157 moves downward. After moving downward to a certain height, the guide shaft 1565 will pass over the one-way component 1564, and the position of the U-shaped plate 1562 during the upward movement will be changed by the one-way component 1564. Specifically, a one-way block 15643 is hinged in the open inclined groove 15642 at the top of the partition 1563. A fifth spring 15644 is provided between the one-way block 15643 and the open inclined groove 15642. The fifth spring 15644 drives the one-way block 15643 to deviate to the right slide. The top of the one-way block 15643 is the downslope from the right slide to the left slide. The bottom of the partition 1563 is the upslope from the left slide to the right slide. When the U-shaped plate 1562 moves downward as the protective shell 157 moves downward, the guide shaft 1565 will pass over the one-way component 1564. The one-way block 15643 is hinged in the open inclined groove 15642 at the top of the partition 1563. When the guide shaft 1565 moves relatively along the right slide to the one-way block 15643, it passes over the one-way block 15643. When the U-shaped plate 1562 moves upward with the protective shell 157, the guide shaft 1565 is guided by the one-way block 15643 into the left slide, so that the toggle tooth 155 of the protective shell 157 leaves the fastening nut 5. After the guide shaft 1565 leaves the left slide, the fourth spring 154 resets the protective shell 157, and the guide shaft 1565 returns to the right slide exit again.

[0042] The U-shaped plate 1562 moves downward as the protective shell 157 moves downward. After moving down to a certain height, the guide shaft 1565 will abut against the lower side of the one-way block 15643 and flip the one-way block 15343, thereby moving the guide shaft 1565 to the upper side of the one-way block 15643; when the protective shell 157 is rising with the U-shaped plate 1562, the guide shaft 1565 will cause the U-shaped plate 1562 to deviate to one side with the protective shell 157, thereby disengaging the toggle tooth 155 from the fastening nut 5. Therefore, during the process of returning and rising the protective shell 157, the toggle tooth 155 can be prevented from squeezing the fastening nut 5 and causing the fastening nut 5 to loosen.

[0043] like Figure 8As shown, the top of the sliding plate 8 is connected to two transverse guide frames 34 via a bent portion 33. The two guide frames 34 have facing grooves 35 parallel to the guide rods 9. The sliding rods 36 on the push plate 16 extend into the grooves 35, slidably connecting the push plate 16 to the guide frames 34. The anti-fall plate 11 pushes the sliding plate 8 forward, which in turn drives the scraper 7 along the horizontal support portion 31. The scraper 7 then automatically removes building materials such as sand and ash that have fallen onto the upper end surface of the horizontal support portion 31. The forward movement of the sliding plate 8 is divided into two strokes. In the first stroke, the sliding rods 36 move within the grooves 35 without pushing the push plate 16. When the sliding rods 36 reach the other end of the grooves 35, the second stroke begins, pushing the push plate 16 downward via the bent portion 33. Because the stroke required for the scraper 7 to clear the work is greater than the action stroke of the anti-loosening component 15, the forward movement process of the sliding plate 8 is divided into two parts. The first stroke only affects the scraper 7, and the second stroke affects the scraper 7 and the anti-loosening component 15 at the same time.

[0044] A first stopper 1521 extends laterally from the lifting rod 152. A U-shaped notch 161 at the lower end of the push plate 16 fits over the lifting rod 152, pressing against the top of the first stopper 1521. A second stopper 162 seals the opening of the U-shaped notch 161. When the upper end of the push plate 16 is squeezed and pushed, the lower end of the push plate 16 squeezes the first stopper 1521, thereby pushing the lifting rod 152 downward.

[0045] Protective shell 157 forms a box body that encloses fastening nut 5. A swinging slot 1531 is defined at the lower end of protective shell 157, into which lifting rod 152 passes. A connecting rod 1532 is provided at the upper end of protective shell 157, which connects to a removable protective plate 1533 to seal the opening. Protective plate 1533 protects protective shell 157, preventing dust and other impurities from entering. It also shields fastening nut 5 from sun and rain, preventing premature rust that could hinder disassembly.

[0046] During the lifting process of lifting frame 1, the stop bar in the middle of the frame 1 abuts against the lower plate of the anti-fall plate 11, causing the anti-fall plate 11 to tilt a certain distance about the first rotation axis 10. This, in turn, pushes the sliding plate 8 forward, which in turn drives the scraper 7 along the support crossbar 31. The scraper 7 then automatically removes sand, ash, and other construction debris that have fallen onto the upper end surface of the support crossbar 31. Simultaneously, the sliding plate 8 moves the push plate 16 forward and downward, causing the lifting rod 152 to move the protective shell 157 downward. During this downward movement, the toggle teeth 155 rotate the fastening nut 5 clockwise, thereby maintaining the fastening nut 5 locked and preventing vibrations from the building structure that could loosen the fastening nut 5, thereby averting potential danger. Furthermore, the protective shell 157 itself shields the fastening nut 5 from sun and rain, preventing premature rust that could hinder disassembly.

[0047] If an unexpected situation occurs on the lifting frame 1, causing it to fall suddenly, the stopper bar located in the middle of the lifting frame 1 will strike the lower plate of the anti-fall plate 11, causing the upper plate of the anti-fall plate 11 to quickly flip over and insert between the multiple stopper bars, thereby preventing the lifting frame 1 from falling further. To prevent the anti-fall plate 11 from further flipping under the downward pressure of the stopper bar, thereby losing its support for the lifting frame 1, the stopper bar 17 is provided. After the upper plate of the anti-fall plate 11 is inserted between the stopper bars, the downward pressure of the stopper bar causes the anti-fall plate 11 to continue to flip over. The stopper bar 17 will resist the anti-fall plate 11 from below, thus preventing the anti-fall plate 11 from further flipping, thereby ensuring that the anti-fall plate 11 can effectively prevent it from falling.

[0048] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A scaffold with a safety anti-fall mechanism, comprising a lifting frame (1), a guide wheel assembly (2) mounted on the lifting frame (1) and capable of sliding relative to the lifting frame, an L-shaped bracket (3) for supporting the guide wheel assembly (2), a connecting screw (4) connected to a vertical frame body (32) of the L-shaped bracket (3), and a fastening nut (5) screwed together with the connecting screw (4) to prevent the connecting screw from being separated from the vertical frame body; Its characteristics are: The L-shaped bracket (3) includes a vertical frame (32) and a horizontal frame that are perpendicular to each other. The horizontal frame includes two support cross bars (31) installed in opposite directions and spaced apart in the middle. One end of the support cross bar (31) is connected to the vertical frame (32) and the other end is connected to the guide wheel assembly (2). The middle of the two support cross bars (31) is connected to a swingable anti-fall plate (11) through a first rotating shaft (10). The anti-fall plate (11) includes an upper plate and a lower plate connected at an obtuse angle. The obtuse angle faces the lifting frame (1). The corner of the upper plate and the lower plate is connected to the first rotating shaft (10). The anti-fall plate (11) swings, and the upper plate and the lower plate are connected. Both can be inserted between the stop bars of the lifting frame (1), and the anti-fall plate (11) is connected to the spring to keep the lower plate within the stop bar range of the lifting frame (1); a limit rod (17) is fixed between the two supporting cross bars (31), and the limit rod (17) is located in the swing direction of the upper plate toward the lifting frame (1). When the lifting frame (1) falls sharply, the stop bar hits the lower plate to make the anti-fall plate (11) swing greatly. After the upper plate penetrates between the stop bars of the lifting frame (1), it stops at the limit rod (17), and the lifting frame (1) is blocked from falling; when the lifting frame (1) rises or falls slowly, the stop bar pushes the lower plate away, and the anti-fall plate (11) swings slightly and then resets; It also includes a scraper (7), a sliding plate (8) and two guide rods (9); a guide groove (311) is provided on the opposite side of the two supporting cross bars (31); the scraper (7) spans the two supporting cross bars (31) and is slidably clamped on the horizontal frame through the cooperation of the rolling wheels (6) on both sides and the guide groove (311); The sliding plate (8) is located between the supporting cross bars (31) and is fixedly connected to the scraper (7); two guide rods (9) are arranged in the middle of the two supporting cross bars (31) on the left and the right, and are connected as a whole through the support blocks (13) at the ends, and the support blocks (13) are fixed on the vertical frame (32); the guide rods (9) are parallel to the supporting cross bars (31), the guide holes of the sliding plate (8) are slidably matched with the guide rods (9), and a second spring (14) is sleeved on the guide rods (9) between the sliding plate (8) and the support blocks (13); the upper plate of the anti-fall plate (11) is backed against the sliding plate (8), and the lower plate of the anti-fall plate (11) and the sliding plate (8) are connected to the first spring (12); the upper plate is longer than the lower plate, and the lifting frame (1) rises or falls slowly. When the anti-fall plate (11) swings slightly, the upper plate pushes the sliding plate (8) to slide, and the scraper (7) performs a scraping action; It also includes an anti-loosening component (15), which includes a lifting rod (152), the lifting rod (152) is connected to the L-shaped bracket (3) through a vertical guide mechanism, a push plate (16) is connected between the lifting rod (152) and the sliding plate (8), and the lateral movement of the sliding plate (8) is converted into a thrust for the lifting rod (152) to move downward through the push plate (16), and a reset mechanism is provided between the lifting rod (152) and the vertical guide mechanism, so that the lifting rod (152) automatically bounces up after being pressed down; the upper end of the lifting rod (152) is connected to a swingable protective shell (157), the protective shell (157) is sleeved on the outer ring of the fastening nut (5), and a fourth spring (154) is provided between the protective shell (157) and the lifting rod (152) to make the protective shell (157) swing to one side, and a toggle tooth (155) is arranged vertically on the inner wall of the protective shell (157) close to the fastening nut (5); A direction-changing assembly (156) is provided outside the protective shell (157); the direction-changing assembly (156) includes a pad (1561) and a U-shaped plate (1562); the U-shaped plate (1562) and the protective shell (157) are connected as a whole; the pad (1561) is located between the protective shell (157), the U-shaped plate (1562) and the vertical frame (32); the pad (1561) is fixedly connected to the vertical frame (32) and is in sliding contact with the protective shell (157) and the U-shaped plate (1562); the U-shaped plate (1562) has an opening at the bottom and a partition (1563) is provided in the middle; the partition (1563) divides the U-shaped plate (1562) into left and right slides, the upper parts of the left and right slides are connected; a guide shaft (1565) is fixed on the pad (1561), and the guide shaft (1565) can slide between the left and right slides; A one-way block (15643) is hinged in the open inclined groove (15642) at the top of the partition (1563). A fifth spring (15644) is provided between the one-way block (15643) and the open inclined groove (15642). The fifth spring (15644) drives the one-way block (15643) to deviate to the right slide. The top of the one-way block (15643) is a downslope from the right slide to the left slide. The bottom of the partition (1563) is an upslope from the left slide to the right slide. When the U-shaped plate (1562) moves downward with the protective shell (157), the guide shaft ( When the guide shaft (1565) moves relatively along the right slide to the one-way block (15643), it passes over the one-way block (15643). When the U-shaped plate (1562) moves upward along the protective shell (157), the guide shaft (1565) is guided by the one-way block (15643) into the left slide, so that the toggle tooth (155) of the protective shell (157) leaves the fastening nut (5). After the guide shaft (1565) is separated from the left slide, the fourth spring (154) resets the protective shell (157), and the guide shaft (1565) returns to the right slide exit again.

2. A scaffold with a safety anti-fall mechanism according to claim 1, characterized in that: The top end of the sliding plate (8) is connected to two transverse guide frames (34) through a bending portion (33), and the two guide frames (34) have a sliding groove (35) parallel to the guide rod (9) on the opposite side. The sliding rod (36) on the push plate (16) extends into the sliding groove (35) to make the push plate (16) and the guide frame (34) slidably connected.

3. The scaffolding with a safety anti-falling mechanism according to claim 1, characterized in that: A first stopper (1521) extends transversely from the lifting rod (152), a U-shaped notch (161) at the lower end of the push plate (16) is sleeved on the lifting rod (152) and pressed against the top of the first stopper (1521), and a second stopper (162) is provided at the opening of the U-shaped notch (161) to seal it.

4. The scaffolding with a safety anti-falling mechanism according to claim 1, characterized in that: A guide sleeve (151) is fixed on the horizontal frame, and a lifting rod (152) is movably inserted into a vertical guide hole of the guide sleeve (151). A third spring (153) is provided between the lower end of the lifting rod (152) and the bottom of the guide hole.

5. The scaffolding with a safety anti-falling mechanism according to claim 1, characterized in that: The protective shell (157) forms a box body that encloses the fastening nut (5). The lower end of the protective shell (157) is provided with a swing groove (1531), and the lifting rod (152) is inserted into the swing groove (1531). The upper end of the protective shell (157) is provided with a connecting rod (1532), and the detachable guard plate (1533) is connected through the connecting rod (1532) to close its opening.

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