Multi-guide-rail ball falling protector and working method thereof

Abstract

The invention discloses a multi-guide-rail ball falling protector and a working method thereof.The multi-guide-rail ball falling protector comprises a main side plate, a front brake cutter, a rear brake cutter, a rope tying plate and a torsional spring and further comprises a limiting wheel shaft set, a limiting wheel and a ball pressing assembly; bottom sliding edges extending towards the vertical wall of the guide rail are arranged at the bottoms of the main side plates, the vertical wall of the guide rail is inserted between the two bottom sliding edges in a penetrating mode, and the head of the guide rail is limited between the bottom sliding edges and the limiting wheels. The limiting wheel is installed between the front brake cutter and the rear brake cutter through the limiting wheel shaft set, and a limiting arc groove matched with the head of the guide rail is formed in the middle of the limiting wheel. The multiple ball pressing assemblies are symmetrically arranged on the inner end face of the bottom sliding edge, and balls of the ball pressing assemblies are pressed on the surface of the vertical wall of the guide rail. The anti-falling device can be suitable for various types of guide rails, the vertical walls of the guide rails can be pressed, and deflection of the anti-falling device is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of guide rail fall arresters, and in particular to a multi-guide rail ball fall arrester and a working method thereof. Background Art

[0002] The fall arrester uses the weight of the falling object to control itself, and can quickly brake and lock the falling object within a limited distance. During the construction and maintenance of wind power towers or power transmission and distribution lines, workers are often required to climb ladders or equipment structures to perform operations. By installing the fall arrester on the guide rail and connecting it to the safety rope for climbing, when the construction worker accidentally falls, the weight of the worker can quickly lock the fall arrester on the guide rail and pull the safety rope, thereby preventing the construction worker from falling to death.

[0003] Existing rail-type fall arresters can often only be installed on rails with specific cross-sections, and the two are supplied as a set. However, there are many types of rails, and the mainstream rails mainly include T-type rails and cylindrical head rails. The fall arresters corresponding to the two rails are not universal, resulting in the need to replace the fall arresters when operators climb different towers, which is very inconvenient. Moreover, the head cross plate of the T-type rail is of two types, wide and narrow. When the fall arrester is installed on a narrow T-type rail, the gap between the head cross plate is large, and it is easy to swing left and right, making the fall arrester unstable and causing a large sliding distance when falling, posing a certain risk to the safety of the operators.

[0004] Therefore, it is necessary to develop a multi-guide ball fall arrester to overcome the above-mentioned defects. Summary of the invention

[0005] The object of the present invention is to provide a multi-guide rail ball fall arrester, which utilizes a bottom sliding edge and a limiting wheel with a limiting arc groove to adapt to the head of the guide rail, and can be applicable to various types of guide rails; by adding a ball clamping assembly to the inner end surface of the bottom sliding edge, the guide rail vertical wall can be clamped, thereby avoiding the deflection of the fall arrester.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention discloses a multi-guide rail ball fall arrester, comprising a main side plate, a front brake knife, a rear brake knife, a rope plate and a torsion spring, and also comprising a limiting wheel axle group, a limiting wheel and a ball pressing assembly. The cross section of the main side plate is L-shaped, and a bottom sliding edge extending toward the vertical wall of the guide rail is arranged at the bottom of the main side plate, and the vertical wall of the guide rail is inserted between two bottom sliding edges, and the head of the guide rail is limited between the bottom sliding edge and the limiting wheel; the limiting wheel is installed between the front brake knife and the rear brake knife through the limiting wheel axle group, and a limiting arc groove adapted to the head of the guide rail is opened in the middle of the limiting wheel; a plurality of the ball pressing assemblies are symmetrically arranged on the inner end surface of the bottom sliding edge, and the balls of the ball pressing assemblies are pressed against the vertical wall surface of the guide rail.

[0008] Furthermore, the top surface of the bottom sliding edge is a slope that is lower inside and higher outside, and the slope is adapted to the bottom surface of the head of the guide rail; arc chamfers are provided at both inlet and outlet ends of the slope.

[0009] Furthermore, the front brake knife and the rear brake knife are respectively provided with a clearance arc groove 1 and a clearance arc groove 2 on the bottom surface facing the guide rail head; the clearance arc groove 1 is connected with the brake step groove 1 of the brake end of the front brake knife, and the clearance arc groove 2 is connected with the brake step groove 2 of the brake end of the rear brake knife.

[0010] Furthermore, a clamping mounting hole is opened on the end surface of the bottom sliding edge, and the number of the clamping mounting holes is two and they are arranged at both ends of the bottom sliding edge; the ball clamping assembly is installed in the clamping mounting hole.

[0011] Furthermore, the ball clamping assembly also includes a compression spring and a screw plug. The diameter of the inner end hole of the clamping mounting hole is smaller than the diameter of the ball, and the outer end hole of the clamping mounting hole is set as a threaded hole; the screw plug is threadedly connected to the threaded hole, and the ball partially protrudes out of the inner end hole of the clamping mounting hole. The compression spring is coaxially arranged in the clamping mounting hole, and the two ends of the compression spring respectively abut the ball and the screw plug.

[0012] Furthermore, the ball pressing assembly also includes a ball seat, which is arranged between the ball and the compression spring, and the inner end of the ball seat is provided with a ball groove adapted to the ball.

[0013] Furthermore, a weight-reducing groove is provided on the inner side of the vertical wall of the main side plate, and the weight-reducing groove is filled with a sponge board, and the sponge board can contact the side wall of the guide rail head.

[0014] Furthermore, the front brake knife and the rear brake knife are both installed between the two main side plates through a knife shaft assembly; the main body of the knife shaft assembly is a stepped shaft, and the thin shaft sections at both ends of the stepped shaft pass through the spacer sleeve on the inner side of the main side plate and are locked with a pin; the inner end wall of the spacer sleeve limits the side wall of the front brake knife or the rear brake knife.

[0015] Furthermore, a limiting platform is arranged on the inner end wall of the aperture of the spacer sleeve of one of the main side plates, and a retaining groove cooperating with the limiting platform is arranged at the step at one end of the stepped shaft.

[0016] The present invention also discloses a working method of a multi-guide rail ball anti-fall device, wherein the multi-guide rail ball anti-fall device described in any one of the above items is installed on the guide rail for anti-fall protection, and can be adapted to guide rails of various cross-sectional specifications, and the ball clamping assembly is pressed on the guide rail vertical wall to achieve automatic centering.

[0017] Compared with the prior art, the beneficial technical effects of the present invention are:

[0018] The present invention provides a multi-guide rail ball fall arrester, which limits and guides the guide rail head through the bottom sliding edge and the upper limiting wheel. The limiting arc groove in the middle of the limiting wheel ensures that the flat-top T-type guide rail can be guided and adapted to the arc-top T-type guide rail and the cylindrical head guide rail. A fall arrester is truly adapted to a variety of guide rails, which greatly facilitates on-site climbing construction workers. By arranging the ball clamping assembly on the inner end face of the bottom sliding edge, the balls of the ball clamping assembly are pressed against the vertical wall of the guide rail, so that the fall arrester can be automatically centered relative to the guide rail, and the deflection of the fall arrester during the climbing process is also reduced. The multi-guide rail ball fall arrester of the present invention can be applied to various types of guide rails, can clamp the vertical wall of the guide rail, and avoid the deflection of the fall arrester.

[0019] In addition, by setting the top surface of the bottom sliding edge as an inclined surface with a lower inside and a higher outside, on the one hand, it can better adapt to the guide rail, and on the other hand, it can increase the connection strength between the root of the bottom sliding edge and the main side plate vertical plate. By adding a circular arc chamfer at the end of the inclined surface, smooth guiding is facilitated and jamming is reduced. By adding a clearance arc groove on the bottom surface of the front brake knife and the rear brake knife facing the guide rail head, when adapting the cylindrical head guide rail, the scratching of the brake knife and the cylindrical head guide rail is also reduced, and at the same time, the cylindrical head of the brake guide rail can be better centered and will not deflect during braking. The threaded hole at the outer end of the clamping mounting hole is connected by a threaded connection with a screw plug. The preload force of the compression spring can be adjusted by adjusting the screw-in depth of the screw plug, thereby realizing the adjustment of the ball pressing force. By adding the ball seat, the rolling effect of the ball can be improved and the resistance during climbing can be reduced. By opening a weight-reducing groove on the inner side of the vertical wall of the main side plate and installing the sponge board, on the one hand, the weight of the entire fall arrester is reduced, that is, the climbing burden of the operator is reduced; on the other hand, the sponge board can contact the side wall of the guide rail head for auxiliary support, cooperate with the bottom clamp of the ball clamping assembly, and contact and support everywhere to ensure that the fall arrester will not deflect. Moreover, the sponge board can also play the role of wiping the side wall of the guide rail head, cleaning the outer surface, and preventing the fall arrester from getting stuck next time. By limiting the side wall of the brake knife by the inner end wall of the spacer sleeve, the brake knife can be prevented from axially moving along the knife shaft assembly, thereby improving the braking stability; by cooperating with the limit platform and the retaining groove, the rotation of the knife shaft assembly in the hole of the spacer sleeve is limited, and the front brake knife will only rotate through the knife shaft hole in cooperation with the thick shaft section of the stepped shaft, reducing the risk of the pin being loose. By arranging a retaining spring cover at the axial end of the retaining pin body, the inner retaining spring can be protected. Even if the outer retaining spring falls off due to an accidental impact, the inner retaining spring will be well protected and will not fall off, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the main structure of the multi-guide rail ball anti-fall device of the present invention;

[0022] Figure 2 It is a left-side structural schematic diagram of the multi-guide rail ball anti-fall device of the present invention;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the multi-guide rail ball anti-fall device of the present invention;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the multi-guide rail ball anti-fall device of the present invention from another angle;

[0025] Figure 5 It is a schematic diagram of the main cross-sectional structure of the multi-guide rail ball anti-fall device of the present invention;

[0026] Figure 6 for Figure 1 Schematic diagram of the cross-sectional structure of the middle AA part;

[0027] Figure 7 for Figure 1 Schematic diagram of the cross-sectional structure of the middle BB part;

[0028] Figure 8 It is a schematic diagram of the three-dimensional structure of the main side plate of the present invention;

[0029] Fig. 9 It is a schematic diagram of the three-dimensional structure of the knife shaft assembly of the present invention;

[0030] Fig.10 It is a schematic diagram of the three-dimensional structure of the front brake blade of the present invention;

[0031] Fig.11 It is an exploded view of the multi-guide rail ball fall arrester of the present invention.

[0032] Description of reference numerals: 1. Main side plate; 101. Bottom sliding edge; 102. Spacer sleeve; 1021. Limiting platform; 103. Limiting wheel mounting hole; 104. Clamping mounting hole; 105. Torsion spring head plug-in hole; 106. Weight reduction groove; 2. Front brake knife; 201. Brake step groove 1; 202. Knife shaft hole; 203. Support ear hole; 204. Torsion spring stop groove; 205. Yield arc groove 1; 3. Rear Moving knife; 301, brake step groove two; 302, give way arc groove two; 4, rope plate; 401, rope hole; 5, knife shaft assembly; 501, pin one; 502, retaining groove; 6, limiting wheel shaft assembly; 601, pin two; 7, limiting wheel; 701, limiting arc groove; 8, torsion spring; 9, bayonet pin assembly; 901, retaining spring; 902, retaining spring cover; 10, ball bearing; 11, compression spring; 12, screw plug. DETAILED DESCRIPTION

[0033] The core of the present invention is to provide a multi-guide rail ball fall arrester, which uses a bottom sliding edge and a limiting wheel with a limiting arc groove to adapt to the head of the guide rail, and can be suitable for various types of guide rails; by adding a ball clamping assembly on the inner end face of the bottom sliding edge, the guide rail vertical wall can be clamped, thereby avoiding the deflection of the fall arrester.

[0034] 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.

[0035] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] With reference to the accompanying drawings, Figure 1 It is a schematic diagram of the main structure of the multi-guide rail ball anti-fall device of the present invention; Figure 2 It is a left-side structural schematic diagram of the multi-guide rail ball anti-fall device of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the multi-guide rail ball anti-fall device of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the multi-guide rail ball anti-fall device of the present invention from another angle;

[0037] Figure 5 It is a schematic diagram of the main cross-sectional structure of the multi-guide rail ball anti-fall device of the present invention; Figure 6 for Figure 1 Schematic diagram of the cross-sectional structure of the middle AA part; Figure 7 for Figure 1 Schematic diagram of the cross-sectional structure of the middle BB part; Figure 8 It is a schematic diagram of the three-dimensional structure of the main side plate of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the knife shaft assembly of the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the front brake blade of the present invention; Fig.11 It is an exploded view of the multi-guide rail ball fall arrester of the present invention.

[0038] In a specific embodiment, Figures 1 to 11As shown, the multi-rail ball fall arrester of the present invention comprises a main side plate 1, a front brake blade 2, a rear brake blade 3, a rope plate 4 and a torsion spring 8. The two main side plates 1 are symmetrically arranged face to face, and the front brake blade 2 and the rear brake blade 3 are connected between the two main side plates 1 through a pin shaft. The tops of the front brake blade 2 and the rear brake blade 3 are connected to the two ends of the rope plate 4 through a bayonet assembly 9, and a rope hole 401 for hanging a safety rope is provided in the middle of the rope plate 4. The torsion spring 8 is installed between the torsion spring retaining groove 204 of the front brake blade 2 and the torsion spring head plug-in hole 105 of the main side plate 1, and the torsion spring 8 rotates the protruding part of the front brake blade 2 downward. The important difference between the present invention and the existing rail-type fall arrester is that it also includes a limiting wheel shaft group 6, a limiting wheel 7 and a ball pressing assembly. The cross section of the main side plate 1 is L-shaped. A bottom sliding edge 101 extending toward the vertical wall of the guide rail is provided at the bottom of the main side plate 1. The vertical wall of the guide rail is inserted between the two bottom sliding edges 101. The head of the guide rail is limited between the bottom sliding edge 101 and the limiting wheel 7. The limiting wheel 7 is installed between the front brake knife 2 and the rear brake knife 3 through the limiting wheel shaft group 6. A limiting arc groove 701 adapted to the head of the guide rail is provided in the middle of the limiting wheel 7. The outer cylindrical walls at both ends of the limiting wheel 7 contact the flat top surface of the head of the guide rail. A plurality of the ball pressing assemblies are symmetrically arranged on the inner end surface of the bottom sliding edge 101, and the balls 10 of the ball pressing assemblies are pressed against the vertical wall surface of the guide rail.

[0039] The guide rail head is limited and guided by the bottom sliding edge 101 and the upper limiting wheel 7. The limiting arc groove 701 is provided in the middle of the limiting wheel 7 to ensure that the flat-top T-type guide rail can be guided and the T-type guide rail with a circular arc top and the cylindrical head guide rail can be adapted. A fall arrester is truly adapted to a variety of guide rails, which greatly facilitates on-site climbing construction workers. By arranging the ball clamping assembly on the inner end face of the bottom sliding edge 101, the ball 10 of the ball clamping assembly is pressed against the vertical wall of the guide rail, so that the fall arrester can be automatically aligned with the guide rail, and the deflection of the fall arrester during the climbing process is also reduced. The multi-guide rail ball fall arrester of the present invention can be applied to various types of guide rails, can press the vertical wall of the guide rail, and avoid the deflection of the fall arrester.

[0040] In a specific embodiment of the present invention, Figure 2 , Figure 5 , Figure 6 and Figure 8 As shown, the top surface of the bottom sliding edge 101 is a slope that is lower inside and higher outside, and the slope is adapted to the bottom surface of the head of the T-shaped guide rail. The inlet and outlet ends of the slope are provided with arc chamfers.

[0041] By setting the top surface of the bottom sliding edge 101 as a slope with a lower inside and a higher outside, on the one hand, it can better adapt to the guide rail, and on the other hand, it can increase the connection strength between the root of the bottom sliding edge 101 and the vertical plate of the main side plate 1. By adding an arc chamfer at the end of the slope, it is easy to guide smoothly and reduce jamming.

[0042] In a specific embodiment of the present invention, Figure 4 , Figure 5 and Fig.10 As shown, the front brake blade 2 and the rear brake blade 3 are provided with a first clearance arc groove 205 and a second clearance arc groove 302 on the bottom surface facing the guide rail head, and the clearance arc groove 205 and the second clearance arc groove 302 are provided in the middle. The first clearance arc groove 205 and the second clearance arc groove 302 are provided along the length direction of the guide rail. The first clearance arc groove 205 is connected with the brake step groove 201 of the brake end of the front brake blade 2, and the second clearance arc groove 302 is connected with the brake step groove 2 301 of the brake end of the rear brake blade 3.

[0043] By adding a clearance arc groove on the bottom surface of the front brake knife 2 and the rear brake knife 3 facing the guide rail head, the scratching of the brake knife and the cylindrical head guide rail is reduced when the cylindrical head guide rail is adapted. At the same time, the cylindrical head of the brake guide rail can be better centered and will not deviate during braking.

[0044] In a specific embodiment of the present invention, Figure 6 and Fig.11 As shown, the main pin of the limiting wheel shaft assembly 6 is connected to the limiting wheel mounting hole 103 of the main side plate 1, and passes through the middle hole of the limiting wheel 7, and the two ends are locked by pin 2 601. The limiting wheel 7 rotates on the main pin, and the length of the limiting wheel 7 is adapted to the distance between the two main side plates 1.

[0045] In a specific embodiment of the present invention, Figure 8 and Fig.11 As shown, a clamping installation hole 104 is opened on the end surface of the bottom sliding edge 101, and the number of the clamping installation holes 104 is two and they are arranged at both ends of the bottom sliding edge 101. The ball pressing assembly is installed in the clamping installation hole 104.

[0046] Specifically, if Figure 7 and Fig.11 As shown, the ball pressing assembly further includes a compression spring 11 and a screw plug 12. The diameter of the inner end opening of the clamping installation hole 104 is smaller than the diameter of the ball 10, and the outer end opening of the clamping installation hole 104 is set as a threaded hole. The screw plug 12 is threadedly connected to the threaded hole, and the ball 10 partially protrudes out of the inner end hole of the clamping installation hole 104. The protruding part of the ball 10 is pressed against the vertical wall surface of the guide rail. The compression spring 11 is coaxially arranged in the clamping installation hole 104, and the two ends of the compression spring 11 abut against the ball 10 and the screw plug 12 respectively.

[0047] Obviously, the ball pressing assembly can also be pushed by a small cylinder filled with compressed air, the small cylinder is built in the clamping mounting hole 104, the piston rod of the small cylinder is arranged inward and pushes the rear of the ball 10. The effect of elastically pushing the ball 10 can also be achieved, and similar simple replacement methods all fall within the protection scope of the present invention.

[0048] Specifically, the ball pressing assembly further includes a ball seat, which is arranged between the ball 10 and the compression spring 11, and the inner end of the ball seat is provided with a ball groove adapted to the ball 10. The ball seat is made of polytetrafluoroethylene plastic material, has a self-lubricating effect, and can improve the rolling effect of the ball 10.

[0049] By threading the screw plug 12 to the threaded hole at the outer end of the clamping mounting hole 104, the preload force of the compression spring 11 can be adjusted by adjusting the screwing depth of the screw plug 12, thereby adjusting the clamping force of the ball 10. By adding the ball seat, the rolling effect of the ball 10 can be improved and the resistance during climbing can be reduced.

[0050] In a specific embodiment of the present invention, Figure 8 As shown, a weight-reducing groove 106 is provided on the inner side of the vertical wall of the main side plate 1, and the weight-reducing groove 106 is filled with a sponge board, the thickness of the sponge board is greater than the depth of the weight-reducing groove 106, the sponge board protrudes from the inner vertical wall of the main side plate 1, and the sponge board can contact the side wall of the guide rail head for auxiliary support. In the accompanying drawings, the sponge board is not drawn and shall not be regarded as a limitation of the present invention.

[0051] By opening a weight-reducing groove 106 on the inner side of the vertical wall of the main side plate 1 and installing the sponge board, on the one hand, the weight of the entire fall arrester is reduced, that is, the climbing burden of the operator is reduced; on the other hand, the sponge board can contact the side wall of the guide rail head for auxiliary support, cooperate with the bottom clamping of the ball pressing assembly, and contact and support everywhere to ensure that the fall arrester will not deflect. In addition, the sponge board can also wipe the side wall of the guide rail head, clean the outer surface, and prevent the fall arrester from getting stuck next time.

[0052] In a specific embodiment of the present invention, Figures 1 to 5 , Fig. 9 and Fig.11 As shown, the front brake blade 2 and the rear brake blade 3 are both installed between the two main side plates 1 through the blade shaft assembly 5. The main body of the blade shaft assembly 5 is a stepped shaft, and the thin shaft sections at both ends of the stepped shaft pass through the spacer sleeve 102 on the inner side of the main side plate 1 and are locked by a pin 501. The inner end wall of the spacer sleeve 102 limits the side wall of the front brake blade 2 or the rear brake blade 3. The spacer sleeve 102 is integrally formed with the main side plate 1.

[0053] Specifically, if Figure 8 and Fig. 9 As shown, a limiting platform 1021 is provided on the inner end wall of the opening of the spacing sleeve 102 of a main side plate 1, and a retaining groove 502 cooperating with the limiting platform 1021 is provided at the step at one end of the stepped shaft.

[0054] By limiting the side wall of the brake knife by the inner end wall of the spacer sleeve 102, the brake knife can be prevented from axially moving along the knife shaft assembly 5, thereby improving the braking stability; by the cooperation of the limit platform 1021 and the retaining groove 502, the rotation of the knife shaft assembly 5 in the hole of the spacer sleeve 102 is restricted, and the front brake knife 2 can only rotate through the knife shaft hole 202 to cooperate with the thick shaft section of the stepped shaft, thereby reducing the risk of the pin 501 loosening.

[0055] In a specific embodiment of the present invention, Figures 1 to 6 and Fig.11 As shown, the bayonet assembly 9 includes a bayonet body, a clamping spring 901 and a clamping spring cover 902. The bayonet body passes through the end hole of the rope tie plate 4 and the ear hole 203 on the ear seat at the top end of the front brake blade 2 and is locked by the clamping spring 901. There are two clamping springs 901, and two clamping spring grooves are formed at the protruding end of the corresponding bayonet body. The clamping spring cover 902 is coaxially arranged between the two clamping springs 901, and the clamping spring cover 902 closes and covers the inner clamping spring 901.

[0056] By setting the retaining spring cover 902 at the axial end of the retaining pin body, the inner retaining spring 901 can be protected. Even if the outer retaining spring 901 falls off due to an accidental impact, the inner retaining spring 901 will be well protected and will not fall off, thereby improving safety.

[0057] The working principle of the multi-rail ball fall arrester of the present invention is as follows: the fall arrester is installed on a flat-top T-rail, and the top plate of the head of the flat-top T-rail is limited between the top surface of the bottom sliding edge 101 and the outer cylindrical wall of the limiting wheel 7. The ball 10 is pressed against the vertical wall of the flat-top T-rail, and the sponge plate in the weight-reducing groove 106 contacts the side wall of the head of the flat-top T-rail for auxiliary support. The contact support at all four sides ensures that the fall arrester and the flat-top T-rail are aligned without deviation. When braking occurs, the climber's weight pulls down the rope plate 4 through the safety rope, and the rope plate 4 pulls the upper part of the front brake knife 2 and the rear brake knife 3 through the pin assembly 9. The brake step grooves at the braking ends of the front brake knife 2 and the rear brake knife 3 are simultaneously clamped on the head plane of the flat-top T-rail, forming a brake to prevent the climber from continuing to sink.

[0058] When the fall arrester is installed on the cylindrical head guide rail, the cylindrical head of the cylindrical head guide rail is limited between the top surface of the bottom sliding edge 101 and the limiting arc groove 701. The ball 10 is pressed against the vertical wall of the cylindrical head guide rail, and cooperates with the limiting arc groove 701 to ensure that the fall arrester and the cylindrical head guide rail are aligned without deviation. It should be noted that at this time, the sponge board cannot contact the outer wall of the cylindrical head. At the same time, due to the setting of the giving way arc groove 1 205 and the giving way arc groove 2 302, the bottom surface of the front brake knife 2 and the rear brake knife 3 do not interfere with the outer wall of the cylindrical head. When braking occurs, the climber's weight pulls down the rope plate 4 through the safety rope, and the rope plate 4 pulls the upper part of the front brake knife 2 and the rear brake knife 3 through the pin assembly 9. The brake step grooves at the braking ends of the front brake knife 2 and the rear brake knife 3 are simultaneously clamped on the outer wall of the cylindrical head, wherein the through-portion of the yield arc groove and the brake step groove forms a braking point with good centering. The braking is completed to prevent the climber from continuing to sink.

[0059] In summary, the multi-rail ball fall arrester of the present invention limits and guides the rail head through the bottom sliding edge 101 and the upper limiting wheel 7, and the limiting arc groove 701 is provided in the middle of the limiting wheel 7 to ensure that the flat-top T-type rail can be guided and adapted to the arc-top T-type rail and the cylindrical head rail. A fall arrester is truly adapted to a variety of rails, which greatly facilitates on-site climbing construction workers. By arranging the ball clamping assembly on the inner end face of the bottom sliding edge 101, the ball 10 of the ball clamping assembly is pressed against the vertical wall of the guide rail, so that the fall arrester can be automatically centered relative to the guide rail, and the deflection of the fall arrester during the climbing process is also reduced. The multi-rail ball fall arrester of the present invention can be applied to various types of guide rails, can press the vertical wall of the guide rail, and avoid the deflection of the fall arrester. In addition, by setting the top surface of the bottom sliding edge 101 as an inclined surface with a lower inside and a higher outside, on the one hand, it can better adapt to the guide rail, and on the other hand, it can increase the connection strength between the root of the bottom sliding edge 101 and the vertical plate of the main side plate 1. By adding a circular arc chamfer at the end of the inclined surface, smooth guiding is facilitated and jamming is reduced. By adding a clearance arc groove on the bottom surface of the front brake knife 2 and the rear brake knife 3 facing the guide rail head, when adapting the cylindrical head guide rail, the scratching of the brake knife and the cylindrical head guide rail is also reduced, and at the same time, the cylindrical head of the brake guide rail can be better centered and will not deflect during the braking process. The threaded hole at the outer end of the clamping mounting hole 104 is threadedly connected to the threaded hole 12, and the screw-in depth of the thread plug 12 can be adjusted to adjust the preload force of the compression spring 11, thereby realizing the adjustment of the clamping force of the ball 10. By adding the ball seat, the rolling effect of the ball 10 can be improved and the resistance during climbing can be reduced. By opening a weight-reducing groove 106 on the inner side of the vertical wall of the main side plate 1 and installing the sponge board, on the one hand, the mass of the entire fall arrester is reduced, that is, the climbing burden of the operator is reduced; on the other hand, the sponge board can contact the side wall of the guide rail head for auxiliary support, cooperate with the bottom clamping of the ball clamping assembly, contact and support everywhere, and ensure that the fall arrester will not deflect. In addition, the sponge board can also play the role of wiping the side wall of the guide rail head, cleaning the outer surface, and preventing the fall arrester from getting stuck next time. By limiting the side wall of the brake knife through the inner end wall of the spacer sleeve 102, the brake knife can be prevented from axially moving along the knife shaft assembly 5, thereby improving the braking stability; by the cooperation of the limit platform 1021 and the retaining groove 502, the rotation of the knife shaft assembly 5 in the hole of the spacer sleeve 102 is limited, and the front brake knife 2 can only rotate through the knife shaft hole 202 in cooperation with the thick shaft section of the stepped shaft, thereby reducing the risk of the pin 1 501 being loosened. By setting the retaining spring cover 902 at the axial end of the retaining pin body, the inner retaining spring 901 can be protected. Even if the outer retaining spring 901 falls off due to an accidental impact, the inner retaining spring 901 will be well protected and will not fall off, thereby improving safety.

[0060] The present invention also discloses a working method of a multi-guide rail ball anti-fall device, wherein the multi-guide rail ball anti-fall device described in any one of the above items is installed on the guide rail for anti-fall protection, and can be adapted to guide rails of various cross-sectional specifications, and the ball clamping assembly is pressed on the guide rail vertical wall to achieve automatic centering.

[0061] Using multiple groups of the ball clamping assemblies to clamp the guide rail rib vertical walls can ensure that the fall arrester always fits the guide rail during the sliding process without deflection, which greatly improves the stability of the fall arrester.

[0062] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0063] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A multi-guide rail ball anti-fall device, comprising a main side plate (1), a front brake knife (2), a rear brake knife (3), a rope plate (4) and a torsion spring (8), characterized in that: It also includes a limiting wheel axle group (6), a limiting wheel (7) and a ball pressing assembly. The cross section of the main side plate (1) is L-shaped. The bottom of the main side plate (1) is provided with a bottom sliding edge (101) extending toward the vertical wall of the guide rail. The vertical wall of the guide rail is inserted between the two bottom sliding edges (101). The head of the guide rail is limited between the bottom sliding edge (101) and the limiting wheel (7); the limiting wheel (7) is installed between the front brake knife (2) and the rear brake knife (3) through the limiting wheel axle group (6), and a limiting arc groove (701) adapted to the head of the guide rail is opened in the middle of the limiting wheel (7); a plurality of ball pressing assemblies are symmetrically arranged on the inner end surface of the bottom sliding edge (101), and the balls (10) of the ball pressing assemblies are pressed against the vertical wall surface of the guide rail.

2. The multi-guide rail ball anti-fall device according to claim 1 is characterized in that: The top surface of the bottom sliding edge (101) is a sloped surface that is lower inside and higher outside, and the sloped surface is adapted to the bottom surface of the head of the guide rail; arc chamfers are provided at both inlet and outlet ends of the sloped surface.

3. The multi-guide rail ball anti-fall device according to claim 1 is characterized in that: The front brake blade (2) and the rear brake blade (3) are respectively provided with a first clearance arc groove (205) and a second clearance arc groove (302) on the bottom surface facing the guide rail head; the first clearance arc groove (205) is connected with a first brake step groove (201) at the brake end of the front brake blade (2), and the second clearance arc groove (302) is connected with a second brake step groove (301) at the brake end of the rear brake blade (3).

4. The multi-guide rail ball anti-fall device according to claim 2 is characterized in that: A clamping installation hole (104) is provided on the end surface of the bottom sliding edge (101); the clamping installation holes (104) are two in number and are arranged at both ends of the bottom sliding edge (101); and the ball pressing assembly is installed in the clamping installation hole (104).

5. The multi-guide rail ball anti-fall device according to claim 4 is characterized in that: The ball clamping assembly also includes a compression spring (11) and a screw plug (12); the inner end opening diameter of the clamping mounting hole (104) is smaller than the diameter of the ball (10); the outer end opening of the clamping mounting hole (104) is arranged as a threaded hole; the screw plug (12) is threadedly connected to the threaded hole; the ball (10) partially protrudes from the inner end hole of the clamping mounting hole (104); the compression spring (11) is coaxially arranged in the clamping mounting hole (104); and the two ends of the compression spring (11) respectively abut against the ball (10) and the screw plug (12).

6. The multi-guide rail ball anti-fall device according to claim 5, characterized in that: The ball pressing assembly also includes a ball seat, which is arranged between the ball (10) and the compression spring (11), and the inner end of the ball seat is provided with a ball groove adapted to the ball (10).

7. The multi-guide rail ball anti-fall device according to any one of claims 4 to 6, characterized in that: A weight-reducing groove (106) is provided on the inner side of the vertical wall of the main side plate (1), and the weight-reducing groove (106) is filled with a sponge board, and the sponge board can contact the side wall of the guide rail head.

8. The multi-guide rail ball anti-fall device according to claim 1, characterized in that: The front brake knife (2) and the rear brake knife (3) are both installed between the two main side plates (1) via a knife shaft assembly (5); the main body of the knife shaft assembly (5) is a stepped shaft, and the thin shaft sections at both ends of the stepped shaft pass through the spacer sleeve (102) on the inner side of the main side plate (1) and are locked by a pin (501); the inner end wall of the spacer sleeve (102) limits the side wall of the front brake knife (2) or the rear brake knife (3).

9. The multi-guide rail ball anti-fall device according to claim 8, characterized in that: A limiting platform (1021) is provided on the inner end wall of the opening of the spacing sleeve (102) of one of the main side plates (1), and a retaining groove (502) cooperating with the limiting platform (1021) is provided at a step at one end of the stepped shaft.

10. A multi-guide ball anti-fall device working method, characterized in that: The multi-rail ball fall arrester according to any one of claims 1 to 9 is installed on the rail for fall prevention, and can be adapted to rails of various cross-sectional specifications, and the ball clamping assembly is pressed against the rail wall to achieve automatic centering.

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