Falling protector and falling prevention device for flexible track

Abstract

According to the falling protector and the falling protection device for the flexible track, swing of the flexible track is limited through a supporting assembly, a node is formed at the connecting position of the supporting assembly and the flexible track, the falling protector comprises a pair of gear shafts which are rotationally installed in an outer shell and meshed with each other, and each gear shaft is provided with a first curved surface and a second curved surface which are adjacent to each other; a temporary avoiding surface is further arranged on the periphery of the gear shaft; one free end of a torsion spring coaxially arranged with the gear shaft is fixedly connected with the outer shell, and the other free end of the torsion spring is fixedly connected with the end part of the gear shaft; under the action of pretightening force of the torsion spring, the two first curved surfaces form a rail channel matched with the flexible rail, after the gear shaft is driven by external force to rotate, the torsion spring is unscrewed, the two second curved surfaces form a joint passing channel used for passing through a joint, and the two temporary avoiding surfaces form a temporary channel used for passing through a supporting assembly. Therefore, the falling protector continuously passes through the node under the condition that the falling protector is not disassembled and assembled, the moving efficiency is improved, and the operation risk of operators is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of aerial working devices, in particular to a fall arrester and a fall prevention device for a flexible track. Background Art

[0002] The anti-fall device with flexible rail is suitable for installation on various types of lattice power towers, and is used for the safety protection of tower workers when they go up and down the tower. In the event of an accidental fall, the self-locking anti-fall device can be used to lock the worker on the track to prevent the worker from falling freely. However, the flexible guide rail has a certain degree of swaying during use. When working at high altitude, workers may face unexpected swaying, which will affect the normal effect of the anti-fall device.

[0003] In order to overcome the above defects, an anti-sway ring is installed on the tower to limit the swing range of the flexible guide rail. However, the use of the anti-sway ring will also increase the difficulty of the fall arrester passing through the anti-sway ring. When the fall arrester needs to pass through the anti-sway ring, if the linear track is not in the exact center of the anti-sway ring, but has a large enough radial displacement, or even sticks to the anti-sway ring, then the worker needs to manually press the flexible track to return it to the center of the anti-sway ring so that the fall arrester can pass through the anti-sway ring. In actual operation, it is not easy to push the linear track that is tensioned at both ends. After several such operations, the workers will become tired and their work efficiency will be reduced.

[0004] In addition, a support assembly can be installed on the tower to fix the flexible track from multiple positions of the flexible track. Compared with the method of using an anti-sway ring, the support assembly has a better effect in limiting the swing of the flexible track, but it will form nodes on the flexible track. The fall arrester needs to manually disassemble and assemble the hook lock when passing through the node, and cannot pass through the node continuously, resulting in low movement efficiency. Moreover, when disassembling and assembling the hook lock, the fall arrester will detach from the flexible track, increasing the safety risk of the operators. Utility Model Content

[0005] In view of the shortcomings in the above-mentioned existing production technology, the applicant provides a fall arrester and a fall prevention device for a flexible track, so that the fall arrester can continuously pass through nodes without disassembling the fall arrester, thereby improving the movement efficiency and reducing the operating risks of operators.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A fall arrester for a flexible track, wherein a plurality of support assemblies are arranged at intervals on the flexible track, a node is formed at the connection between the support assemblies and the flexible track, and the cross-sectional size of the node is larger than the cross-sectional size of the flexible track;

[0008] The structure of the fall arrester comprises: an outer shell for connecting a safety rope, the outer shell being provided with an escape channel for avoiding the support assembly and the node; a pair of gear shafts are rotatably mounted in the outer shell, the two gear shafts are meshed with each other and are mirror-symmetrical about the flexible track,

[0009] The middle part of each gear shaft is provided with adjacent first and second curved surfaces in the circumferential direction, the first curved surface corresponds to the flexible track, the second curved surface corresponds to the node, and the outer circumference of the gear shaft is also provided with a temporary avoidance surface, the temporary avoidance surface is located on one side of the second curved surface in the axial direction of the gear shaft, and the temporary avoidance surface corresponds to the support assembly.

[0010] It also includes a torsion spring, which is coaxially arranged with the gear shaft, one free end of the torsion spring is fixedly connected to the outer shell, and the other free end of the torsion spring is fixedly connected to the end of the gear shaft. Under the preload force of the torsion spring, the two first curved surfaces are opposite to each other and form a track channel adapted to the flexible track. After the gear shaft is driven to rotate by an external force, the torsion spring is loosened, the two second curved surfaces are opposite to each other and form a node passage for passing through the node, and the two temporary avoidance surfaces are opposite to each other and form a temporary channel for passing through the support assembly.

[0011] As a further improvement of the above technical solution:

[0012] The node is cylindrical or spherical.

[0013] The avoidance channel includes a longitudinal channel and an axial channel. The longitudinal channel is located on one side of the outer shell and corresponds to the support assembly, and the axial channel is located on the other two opposite sides of the outer shell and corresponds to the node. The longitudinal channel and the axial channel are interconnected.

[0014] The torsion springs are a pair, which are respectively located at the same side ends of the two gear shafts, and the two torsion springs are mirror-symmetrical with respect to the flexible track.

[0015] It also includes a pair of gear shafts, which are spaced apart along the length direction of the flexible track, and the distance between the two pairs of gear shafts is adapted to the size of the node, so as to accommodate the node.

[0016] The structure of a single gear shaft comprises a gear portion, the outer peripheral surface of the gear portion is a tooth surface, and the first curved surface, the second curved surface and the temporary avoidance surface are located on the gear portion;

[0017] The two ends of the gear part are respectively provided with a first installation shaft and a second installation shaft rotatably connected to the outer shell, and the first installation shaft, the second installation shaft and the gear part are coaxially arranged;

[0018] The first installation shaft is outer-circuited with a torsion spring, one free end of the torsion spring is detachably fixedly connected to the first installation shaft, and the other free end of the torsion spring is detachably fixedly connected to the outer shell.

[0019] The torsion spring is a coil spring, the first mounting shaft is provided with a slot, the slot is detachably fixedly connected to the inner hook section of the torsion spring; a limiting column is installed on the outer shell, the limiting column is detachably fixedly connected to the outer hook section of the torsion spring.

[0020] The end of a second mounting shaft of the pair of gear shafts is located outside the outer shell and is equipped with a knob.

[0021] Two first curved surfaces are arranged along the outer circumference direction of the gear shaft, the two first curved surfaces are respectively located on both sides of the second curved surface, and the connection between the first curved surface and the second curved surface is a transition arc surface.

[0022] A fall prevention device comprises a flexible track with both ends fixedly mounted on a structure to be climbed and a support assembly installed on the structure at intervals, one end of the support assembly is mounted on the structure, the other end of the support assembly is connected to the flexible track, a node is formed at the connection between the support assembly and the flexible track, and the flexible track is equipped with the above-mentioned fall prevention device for the flexible track.

[0023] The beneficial effects of the utility model are as follows:

[0024] The utility model has a compact and reasonable structure and is easy to operate. A pair of mutually meshing gear shafts are arranged in an outer shell sleeved on the outside of the flexible track, and a torsion spring is installed between the gear shafts and the outer shell. The track channel is maintained between the two gear shafts by the pre-tightening force of the torsion spring. The torsion spring is loosened after the gear shaft is rotated by external force, and a node channel is formed between the two gear shafts, so that the fall arrester can be self-locked on the flexible track before and after passing the node, so that the fall arrester can continuously pass the node without disassembling the fall arrester, thereby improving the moving efficiency and reducing the operation risk of the operators.

[0025] The utility model also has the following advantages:

[0026] (1) A torsion spring is provided on each gear shaft to ensure that the forces on the two gear shafts are relatively balanced, thus ensuring the functional stability of the fall arrester.

[0027] (2) Two pairs of gear shafts are arranged so that when the fall arrester passes through a node, one pair of gear shafts is in a state of forming a track channel, and the other pair of gear shafts is in a state of forming a node-passing channel, ensuring that the fall arrester is still self-locked on the flexible track when passing through a node, thereby preventing the fall during the node-passing process and further reducing the operating risks of the operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the utility model.

[0029] Figure 2 This is an exploded view of the utility model (two pairs of gear shafts).

[0030] Figure 3 This is an exploded view of the utility model (a pair of gear shafts).

[0031] Figure 4 It is a structural schematic diagram of the fall arrester of the utility model.

[0032] Figure 5 It is a structural schematic diagram of the fall arrester of the utility model (from another perspective).

[0033] Figure 6 It is a structural schematic diagram of the gear shaft of the utility model.

[0034] Figure 7 This is a schematic structural diagram of the gear shaft of the utility model (from another perspective).

[0035] Figure 8 It is a schematic diagram of the state of the torsion spring and the gear shaft when the fall arrester of the utility model is self-locking.

[0036] Fig. 9 The utility model is shown in FIG. Figure 1 (The node is located in a pair of gear shafts).

[0037] Fig.10 for Fig. 9 Exploded diagram.

[0038] Fig.11 The utility model is shown in FIG. Figure 2 (The node is located in a pair of gear shafts).

[0039] Fig.12 The utility model is shown in FIG. Figure 3 (The node is located between the two pairs of gear shafts).

[0040] Fig.13 The utility model is shown in FIG. Figure 4 (The node is located in the other pair of gear shafts).

[0041] Wherein: 1. flexible track; 2. support assembly; 20. node;

[0042] 3. Outer shell; 31. Closing plate; 310. Longitudinal channel; 311. First bearing; 312. Limiting column; 32. Box; 320. Axial channel; 321. Second bearing;

[0043] 4. gear shaft; 41. gear part; 4101. first curved surface; 4102. second curved surface; 4103. temporary avoidance surface; 4104. transition arc surface; 42. first mounting shaft; 4201. slot; 43. second mounting shaft; 4301. through hole; 44. circular groove;

[0044] 5. Torsion spring; 6. Limit pin; 7. Knob;

[0045] A0, rail channel; A1, holiday channel; A2, temporary channel. DETAILED DESCRIPTION

[0046] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0047] Embodiment 1:

[0048] like Figure 1-Figure 5 As shown, in the fall arrester for a flexible track of this embodiment, a plurality of support assemblies 2 are arranged at intervals on the flexible track 1, one end of the support assembly 2 is mounted on a structure for climbing work, and the other end of the support assembly 2 is connected to the flexible track 1, and a node 20 is formed at the connection between the support assembly 2 and the flexible track 1, and the cross-sectional size of the node 20 is larger than the cross-sectional size of the flexible track 1;

[0049] The structure of the fall arrester includes: an outer shell 3 for connecting a safety rope, an escape channel for avoiding the support assembly 2 and the node 20 is arranged on the outer shell 3, and a connector for installing the safety rope is arranged on the side of the outer shell 3 away from the escape channel; a pair of gear shafts 4 are rotatably installed in the outer shell 3, and the two gear shafts 4 are meshed with each other and are mirror-symmetrical about the flexible track 1.

[0050] The middle part of each gear shaft 4 is provided with adjacent first curved surface 4101 and second curved surface 4102 in the circumferential direction, the first curved surface 4101 corresponds to the flexible track 1, the second curved surface 4102 corresponds to the node 20, and the outer circumference of the gear shaft 4 is also provided with a temporary avoidance surface 4103, the temporary avoidance surface 4103 is located on the axial side of the second curved surface 4102 of the gear shaft 4, and the temporary avoidance surface 4103 corresponds to the support assembly 2.

[0051] It also includes a torsion spring 5, which is coaxially arranged with the gear shaft 4, one free end of the torsion spring 5 is fixedly connected to the outer shell 3, and the other free end of the torsion spring 5 is fixedly connected to the end of the gear shaft 4. Under the action of the preload force of the torsion spring 5, the two first curved surfaces 4101 are opposite to each other and form a track channel A0 adapted to the flexible track 1, so that the fall arrester is self-locked on the flexible track 1. After the external force drives the gear shaft 4 to rotate, the torsion spring 5 is loosened, the two second curved surfaces 4102 are opposite to each other and form a node channel A1 for passing through the node 20, and the two temporary avoidance surfaces 4103 are opposite to each other and form a temporary channel A2 for passing through the support assembly 2.

[0052] Specifically, the structure for climbing operations can be a lattice-type power tower, and the anti-fall device for climbing operations includes a flexible track 1 with both ends fixedly installed on the structure and support components 2 installed on the structure at intervals, and the flexible track 1 is equipped with a fall arrester; the flexible track 1 usually adopts aluminum-clad steel stranded wire, and a crimping sleeve is installed at one end of the flexible track 1, and the crimping sleeve serves as a fixed end clamp, and a wedge-shaped wire clamp is installed at the other end, and the wedge-shaped wire clamp serves as a tensioning end clamp. When the flexible track 1 is installed vertically, the fixed end of the flexible track 1 should be installed on the tower, and the tensioning end should be installed on the tower foot; the support component 2 can be fixed to the structure by bolt connection; the flexible track 1 passes through the node 20 located at the end of each group of support components 2 to limit the swing of the flexible track 1 during operation.

[0053] The torsion spring 5 is sleeved on the end of the gear shaft 4. The torsion spring 5 can be a coil spring or a torsion spring. The torsion spring 5 is fixed by two free ends and can be loosened and tightened under the action of external force. After the external force disappears, it is in a pre-tightened state.

[0054] The track channel A0 is a cylindrical through hole, and the diameter of the track channel A0 is equal to the diameter of the flexible track 1 or slightly larger than the diameter of the flexible track 1. When no fall occurs, it can slide relatively freely on the flexible track 1, so that the fall arrester is self-locked on the flexible track 1. A certain friction is allowed between the track channel A0 and the flexible track 1, and this friction makes the diameter of the track channel A0 not change much.

[0055] The track channel A0 is sleeved on the outside of the flexible track 1 to achieve self-locking of the fall arrester. When the fall arrester slides on the flexible track 1, the fall arrester will not fall off the flexible track 1. The function of the torsion spring 5 is to keep the two first curved surfaces 4101 opposite to each other and form the track channel A0.

[0056] The node channel A1 is a through-hole structure, and the inner diameter of the node channel A1 is slightly larger than the size of the node 20 .

[0057] Further, if Figure 1-Figure 3 As shown, the node 20 is cylindrical or spherical. When the interlocking channel A1 is a cylindrical through hole, the diameter of the interlocking channel A1 is slightly larger than the diameter of the node 20. The cylindrical or spherical node 20 makes the interlocking channel A1 pass through the node 20 more smoothly.

[0058] like Fig.11 As shown, the temporary avoidance surface 4103 is a plane, and the temporary channel A2 is connected with the festival channel A1, so that the fall arrester passes through the node 20 and the support assembly 2 at the same time. The specific width of the temporary channel A2 is slightly larger than the diameter of the support rod of the support assembly 2, and the cross-sectional size of the temporary channel A2 is smaller than the cross-sectional size of the festival channel A1, ensuring that the fall arrester will not leave the flexible track 1 when a pair of gear shafts 4 pass through the node 20.

[0059] In addition, after a pair of gear shafts 4 pass through the node 20, when the external force disappears, the torsion spring 5 is immediately reset, and the two first curved surfaces 4101 reform the track channel A0, self-locking the fall arrester on the flexible track 1, so that the fall arrester will not fall off the flexible track 1 after the festival.

[0060] When the fall arrester is in the self-locking state, the track channel A0 is sleeved on the outside of the flexible track 1. When the second curved surface 4102 faces upward and falls suddenly, the friction force generated by the first curved surface 4101 and the flexible track 1 drives the gear shaft 4 to rotate, and the torsion spring 5 is tightened, so that the sides of the two first curved surfaces 4101 are simultaneously pressed against the flexible track 1 to lock the fall arrester on the flexible track 1. At this time, one end of the track channel A0 shrinks and the other end becomes larger.

[0061] A pair of meshing gear shafts 4 are arranged in an outer shell 3 sleeved on the outside of the flexible track 1, and a torsion spring 5 is installed between the gear shaft 4 and the outer shell 3. The preload force of the torsion spring 5 is used to maintain a track channel A0 between the two gear shafts 4. The gear shaft 4 is rotated by an external force to loosen the torsion spring 5, and a node channel A1 is formed between the two gear shafts 4. The fall arrester is self-locked on the flexible track 1 before and after passing the node 20, so that the fall arrester can continuously pass the node 20 without disassembling the fall arrester, thereby improving the movement efficiency and reducing the operation risk of the operators.

[0062] Further, if Figure 2-Figure 5 As shown, the avoidance channel includes a longitudinal channel 310 and an axial channel 320. The longitudinal channel 310 is located on one side of the outer shell 3 and corresponds to the support assembly 2. The axial channel 320 is located on the other two opposite sides of the outer shell 3 and corresponds to the node 20. The longitudinal channel 310 and the axial channel 320 are interconnected.

[0063] Specifically, Fig.11 The longitudinal channel 310 and the temporary channel A2 are shown to have the same width.

[0064] Further, if Figure 2-Figure 5 As shown, the structure of the outer shell 3 includes a box body 32, which is a box-shaped structure with an opening on one side. Two sealing plates 31 are spaced apart at the opening of the box body 32, and a longitudinal channel 310 is formed between the two sealing plates 31. Axial channels 320 are arranged on two opposite sides of the box body 32, and the axial channels 320 are connected to the ends of the longitudinal channel 310.

[0065] Specifically, the positions of the two axial channels 320 are consistent with the center positions of the inter-section channel A1 and the track channel A0; the box body 32 and the sealing plate 31 are detachably connected by bolts.

[0066] Further, if Figure 2-Figure 5As shown, there is a pair of torsion springs 5 ​​, which are respectively located at the same side ends of the two gear shafts 4 , and the two torsion springs 5 ​​are mirror-symmetrical with respect to the flexible track 1 .

[0067] A torsion spring 5 is arranged on each gear shaft 4 so that the forces on the two gear shafts 4 are relatively balanced, thereby ensuring the functional stability of the fall arrester.

[0068] Embodiment 2:

[0069] On the basis of the first embodiment, in order to further ensure the safety of the climbing operation, Figure 2 , Figure 4-Figure 13 As shown, a pair of gear shafts 4 are also included. The two pairs of gear shafts 4 are spaced apart along the length direction of the flexible track 1 . The distance between the two pairs of gear shafts 4 is adapted to the size of the node 20 , so as to accommodate the node 20 .

[0070] Two pairs of gear shafts 4 are arranged so that when the fall arrester passes through the node 20, one pair of gear shafts 4 is in a state of forming a track channel A0, and the other pair of gear shafts 4 is in a state of forming a node channel A1, to ensure that the fall arrester is still self-locked on the flexible track 1 when passing the node, thereby preventing the fall in the process of passing the node 20 and further reducing the operating risks of the operators.

[0071] The installation process of the fall arrester for the flexible track of this embodiment is as follows:

[0072] First assemble the fall arrester;

[0073] After the two pairs of gear shafts 4 are rotated, the two pairs of gear shafts 4 are simultaneously in a state of forming a cross-interval channel A1;

[0074] Pass the longitudinal channel 310 and the temporary channel A2 through the flexible track 1 in sequence;

[0075] Then, after the gear shaft 4 is reset, the two pairs of gear shafts 4 are simultaneously in a state of forming a track channel A0, and the track channel A0 is sleeved on the flexible track 1, as shown in FIG. Figure 2 shown.

[0076] Embodiment three:

[0077] On the basis of the first and second embodiments, the structure and installation structure of the gear shaft 4 are further refined, such as Figure 4-Figure 7 As shown, the structure of a single gear shaft 4 includes a gear portion 41, the outer peripheral surface of the gear portion 41 is a tooth surface, and a first curved surface 4101, a second curved surface 4102 and a temporary avoidance surface 4103 are located on the gear portion 41;

[0078] The two ends of the gear portion 41 are respectively provided with a first mounting shaft 42 and a second mounting shaft 43 which are rotatably connected to the outer shell 3, and the first mounting shaft 42, the second mounting shaft 43 and the gear portion 41 are coaxially arranged;

[0079] The first installation shaft 42 is covered with a torsion spring 5 , one free end of the torsion spring 5 is detachably fixedly connected to the first installation shaft 42 , and the other free end of the torsion spring 5 is detachably fixedly connected to the outer shell 3 .

[0080] like Figure 4-Figure 5 As shown, the torsion spring 5 is a coil spring, and the free ends are respectively an inner hook section and an outer hook section of the coil spring. A slot 4201 is provided on the first mounting shaft 42, and the slot 4201 is detachably fixedly connected to the inner hook section of the torsion spring 5; a limiting column 312 is installed on the outer shell 3, and the limiting column 312 is detachably fixedly connected to the outer hook section of the torsion spring 5, and a circular groove 44 is provided on the gear part 41 located on one side of the first mounting shaft 42, and the circular groove 44 is used to accommodate the torsion spring 5.

[0081] Further, if Figure 4-Figure 5 As shown, a first bearing 311 and a second bearing 321 are installed on the outer shell 3 , the first installation shaft 42 is connected to the inner ring of the first bearing 311 , and the second installation shaft 43 is connected to the inner ring of the second bearing 321 .

[0082] Specifically, the first bearing 311 is installed in the groove on the sealing plate 31, the second bearing 321 is installed in the groove of the box body 32, and the bottom of the groove of the box body 32 is provided with a through hole, and the end of the second mounting shaft 43 can extend to the outside of the outer shell 3 through the through hole.

[0083] Further, if Figure 4-Figure 5 As shown, the end of the second mounting shaft 43 of the pair of gear shafts 4 is located outside the outer shell 3 and is installed with a knob 7.

[0084] Specifically, the end of the second installation shaft 43 extends out of the outer shell 3, and the knob 7 is installed on the second installation shaft 43 through the limit pin 6. The gear shaft 4 can be driven to rotate by manually rotating the knob 7, thereby loosening the torsion spring 5.

[0085] For the case of two pairs of gear shafts 4, the knobs 7 can be arranged alternately to facilitate the worker to operate with both hands at the same time, such as Figure 1 , Fig. 9 shown.

[0086] like Figure 1 , Figure 6 As shown, the ends of the second installation shaft 43 are both located outside the outer shell 3 , and the ends of the second installation shaft 43 are radially provided with through holes 4301 , in which the limit pins 6 are installed.

[0087] Further, if Figure 6-Figure 8As shown, two first curved surfaces 4101 are provided along the outer circumference of the gear shaft 4 , and the two first curved surfaces 4101 are respectively located on both sides of the second curved surface 4102 , and the connection between the first curved surface 4101 and the second curved surface 4102 is a transition arc surface 4104 .

[0088] Two first curved surfaces 4101 are set on the same gear shaft 4, and the positions of a pair of gear shafts 4 are interchangeable, which reduces the types of parts of the fall arrester and reduces the production cost. The transition arc surface 4104 plays a guiding role in the process of contacting the node 20, so that the fall arrester passes through the node 20 more smoothly.

[0089] When the fall arrester for flexible track of this embodiment is used for climbing work, the specific process is as follows:

[0090] When moving forward, the safety rope drives the outer shell 3 to move along the flexible track 1, and the outer shell 3 overcomes the friction between the first curved surface 4101 and the flexible track 1 during the movement;

[0091] Specifically, during forward movement, the second curved surface 4102 faces the moving direction, and the fall arrester slides relatively freely on the flexible track 1 .

[0092] When passing through the node in the forward direction, the outer shell 3 is pulled to move along the flexible track 1. During the movement of the outer shell 3, the second curved surface 4102 acts on the node 20 and overcomes the preload force of the torsion spring 5, so that the torsion spring 5 is loosened. After the gear shaft 4 rotates, the two second curved surfaces 4102 are located outside the node 20 to form a node-passing channel A1. After a group of gear shafts 4 pass through the node 20, the gear shafts 4 return to their original positions under the preload force of the torsion spring 5, and the two first curved surfaces 4101 re-form the track channel A0.

[0093] Specifically, before the forward transition process, the second curved surface 4102 is oriented toward the moving direction.

[0094] When moving in the reverse direction, the outer shell 3 moves along the flexible track 1, and the outer shell 3 overcomes the friction between the first curved surface 4101 and the flexible track 1 during the movement;

[0095] Specifically, the safety rope drives the outer shell 3 to move, or the gravity of the fall arrester itself drives the outer shell 3 to move. During forward movement, the second curved surface 4102 faces the opposite direction of the moving direction. At this time, the friction between the track channel A0 and the flexible track 1 makes the diameter of the track channel A0 change little, thereby ensuring that the fall arrester can slide relatively freely on the flexible track 1. If there is any unsmooth passage, manually rotate the knob 7 to loosen the torsion spring 5 and put it in a pre-tightened state.

[0096] When passing through the node in the reverse direction, the gear shaft 4 is manually driven to rotate to loosen the torsion spring 5. After the gear shaft 4 rotates, the two second curved surfaces 4102 form a node passage A1. Then, a pair of gear shafts 4 pass through the node 20, and the gear shaft 4 is returned to its original position under the action of the torsion spring 5 under the preload force. The two first curved surfaces 4101 re-form the track passage A0.

[0097] Specifically, the gear shaft 4 is rotated by manually operating the knob 7, and the gear shaft 4 returns to its original position after the knob 7 is released.

[0098] When falling suddenly, the second curved surface 4102 faces upward, and the friction force generated by the first curved surface 4101 and the flexible track 1 drives the gear shaft 4 to rotate, and the torsion spring 5 is wound up, so that the sides of the two first curved surfaces 4101 are simultaneously pressed against the flexible track 1 to lock the fall arrester on the flexible track 1;

[0099] Specifically, for the case where the flexible track 1 is installed vertically, when the fall arrester is installed, the second curved surface 4102 needs to face upward.

[0100] After the falling state is released, the torsion spring 5 relaxes and resets, and the two first curved surfaces 4101 re-form the track channel A0;

[0101] When passing through the festival in the forward direction and the reverse direction, the second curved surface 4102 forms the festival channel A1 and the two temporary avoidance surfaces 4103 form the temporary channel A2. When the node 20 passes through the festival channel A1, the support assembly 2 passes through the temporary channel A2.

[0102] Furthermore, the fall arrester includes two pairs of gear shafts 4. When the two second curved surfaces 4102 of one pair of gear shafts 4 form a transition channel A1 during forward or reverse transition, the node 20 is located between the two pairs of gear shafts 4, and the two first curved surfaces 4101 of the other pair of gear shafts 4 relatively form a track channel A0.

[0103] like Figure 9-13 As shown, when passing through the node in the forward direction, when the fall arrester moves to the node 20 and needs to pass through the node 20, the fall arrester can be pulled hard to force the second curved surface 4102 to rotate under the obstruction of the node 20, or the gear shaft 4 can be rotated by manually operating the knob 7. Specifically, the upper knob 7 needs to be rotated 90° clockwise to form a node passage A1 between the two gear shafts 4, and the fall arrester is pulled upward to make the node 20 pass through the node passage A1, and then the knob 7 is released, and the node 20 is located between the two pairs of gear shafts 4.

[0104] Then rotate the lower knob 7 counterclockwise by 90° and move the fall arrester in the same way, then release the knob 7. At this time, the node 20 is located below the second pair of gear shafts 4.

[0105] When passing through the festival in the reverse direction, the same applies, but the festival passage A1 can only be formed by manually rotating the knob 7.

[0106] When the fall arrester passes through the node 20, the two pairs of gear shafts 4 successively form a node passage A1. After passing through the node 20, under the action of the restoring force of the torsion spring 5, the corresponding gear shaft 4 is in a self-locking state, so that the fall arrester can continuously pass through the node 20 without completely leaving the flexible track 1. The operation is convenient, the working efficiency is improved, and the safety of the operators is continuously protected.

[0107] Embodiment 4:

[0108] The anti-fall device of this embodiment includes a flexible track 1 with both ends fixedly installed on the structure to be climbed and a support assembly 2 installed on the structure at intervals. One end of the support assembly 2 is installed on the structure, and the other end of the support assembly 2 is connected to the flexible track 1. The connection between the support assembly 2 and the flexible track 1 forms a node 20. The flexible track 1 is equipped with the anti-fall device for the flexible track of the above embodiment.

[0109] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. A fall arrester for a flexible track, characterized in that: A plurality of support assemblies (2) are arranged at intervals on the flexible track (1), a node (20) is formed at the connection between the support assemblies (2) and the flexible track (1), and a cross-sectional dimension of the node (20) is larger than a cross-sectional dimension of the flexible track (1); The structure of the fall arrester comprises: an outer shell (3) for connecting a safety rope, the outer shell (3) being provided with an escape channel for avoiding the support assembly (2) and the node (20); a pair of gear shafts (4) being rotatably mounted in the outer shell (3), the two gear shafts (4) being meshed with each other and being mirror-symmetrical with respect to the flexible track (1), A first curved surface (4101) and a second curved surface (4102) are adjacently arranged in the circumferential direction of the middle part of each gear shaft (4), the first curved surface (4101) corresponds to the flexible track (1), and the second curved surface (4102) corresponds to the node (20); a temporary avoidance surface (4103) is also arranged on the outer circumference of the gear shaft (4), the temporary avoidance surface (4103) is located on one side of the second curved surface (4102) in the axial direction of the gear shaft (4), and the temporary avoidance surface (4103) corresponds to the support assembly (2); The invention also comprises a torsion spring (5), wherein the torsion spring (5) is coaxially arranged with the gear shaft (4), one free end of the torsion spring (5) is fixedly connected with the outer shell (3), and the other free end of the torsion spring (5) is fixedly connected with the end of the gear shaft (4); under the action of the preload force of the torsion spring (5), the two first curved surfaces (4101) are opposite to each other and form a track channel (A0) adapted to the flexible track (1); after the gear shaft (4) is driven to rotate by an external force, the torsion spring (5) is loosened, the two second curved surfaces (4102) are opposite to each other and form a node passage (A1) for passing through the node (20), and the two temporary avoidance surfaces (4103) are opposite to each other and form a temporary channel (A2) for passing through the support assembly (2).

2. A fall arrester for a flexible track as claimed in claim 1, characterized in that: The node (20) is cylindrical or spherical.

3. A fall arrester for a flexible track as claimed in claim 1, characterized in that: The avoidance channel comprises a longitudinal channel (310) and an axial channel (320), wherein the longitudinal channel (310) is located on one side of the outer shell (3) and corresponds to the support assembly (2), and the axial channel (320) is located on the other two opposite sides of the outer shell (3) and corresponds to the node (20), and the longitudinal channel (310) and the axial channel (320) are interconnected.

4. A fall arrester for a flexible track as claimed in claim 1, characterized in that: The torsion springs (5) are provided in a pair and are respectively located at the ends on the same side of the two gear shafts (4). The two torsion springs (5) are mirror-symmetrical with respect to the flexible track (1).

5. A fall arrester for a flexible track as claimed in claim 1, characterized in that: It also comprises a pair of gear shafts (4), the two pairs of gear shafts (4) are arranged at intervals along the length direction of the flexible track (1), and the distance between the two pairs of gear shafts (4) is adapted to the size of the node (20) for accommodating the node (20).

6. A fall arrester for a flexible track as claimed in any one of claims 1 to 5, characterized in that: The structure of a single gear shaft (4) comprises a gear portion (41), the outer peripheral surface of the gear portion (41) is a tooth surface, and the first curved surface (4101), the second curved surface (4102) and the temporary avoidance surface (4103) are located on the gear portion (41); A first mounting shaft (42) and a second mounting shaft (43) rotatably connected to the outer shell (3) are respectively disposed at both ends of the gear portion (41); the first mounting shaft (42), the second mounting shaft (43) and the gear portion (41) are coaxially disposed; The first installation shaft (42) is covered with a torsion spring (5), one free end of the torsion spring (5) is detachably fixedly connected to the first installation shaft (42), and the other free end of the torsion spring (5) is detachably fixedly connected to the outer shell (3).

7. A fall arrester for a flexible track as claimed in claim 6, characterized in that: The torsion spring (5) is a coil spring; the first mounting shaft (42) is provided with a slot (4201), and the slot (4201) is detachably fixedly connected to the inner hook section of the torsion spring (5); a limiting column (312) is installed on the outer shell (3), and the limiting column (312) is detachably fixedly connected to the outer hook section of the torsion spring (5).

8. A fall arrester for a flexible track as claimed in claim 6, characterized in that: The end of a second mounting shaft (43) in the pair of gear shafts (4) is located outside the outer shell (3) and is provided with a knob (7).

9. A fall arrester for a flexible track as claimed in claim 1, characterized in that: Two first curved surfaces (4101) are arranged along the outer circumference direction of the gear shaft (4), and the two first curved surfaces (4101) are respectively located on both sides of the second curved surface (4102), and the connection between the first curved surface (4101) and the second curved surface (4102) is a transition arc surface (4104).

10. A fall prevention device, characterized in that: The invention comprises a flexible track (1) whose two ends are fixedly mounted on a structure to be climbed, and a support assembly (2) installed on the structure at intervals, wherein one end of the support assembly (2) is mounted on the structure, and the other end of the support assembly (2) is connected to the flexible track (1), and a node (20) is formed at the connection between the support assembly (2) and the flexible track (1), and the flexible track (1) is equipped with a fall arrester for the flexible track as described in any one of claims 1 to 9.

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