fall arrestor

Abstract

A kind of fall arrestor, including a shell, fixed seat and its fixed surface are equipped with in the inside of shell top, an outlet is equipped with in the bottom of shell, a lifting ring assembly is combined in the top of shell, the blocking element of tooth is formed in the bottom in fixed surface combination, a main shaft is fixed in the installation space, a rotating hub is sleeved in the main shaft, the rope body is wound multiple turns in the rotating hub, the rope body is outwardly threaded from the outlet by the outer end, a scroll spring is connected between the rotating hub and the main shaft, a brake assembly is combined with the surrounding part and provided with multiple pawl blocks on one side of the rotating hub, when the rotating speed of the rotating hub exceeds the predetermined rotating speed, one of the pawl blocks engages with the tooth to stop the rope body from releasing, to prevent falling accidents;Since the utility model does not need to set the ratchet wheel for braking the rotating hub on the main shaft, the length of the main shaft and the volume of the fall arrestor can be reduced.

Description

Technical Field

[0001] This utility model relates to a safety protection device; in particular, it refers to a fall arrestor to prevent people from falling. Background Technology

[0002] The existing fall arrestor has a main shaft fixed inside the shell, a hub rotatably connected to the main shaft and a ratchet fixed thereon, a braking component connected to one side of the hub, and a rope wrapped around the hub multiple times.

[0003] When using the aforementioned existing fall arrestor, the outer casing is fixed in one place, and one end of the rope passing through the casing is connected to a harness worn by the person. When the person wearing the harness falls from the air, the rope is pulled, causing the hub inside the fall arrestor to rotate rapidly. Due to the centrifugal force of the rapid rotation, the braking component connected to the hub changes from a state where it would not engage with the ratchet to a state where it would engage with the ratchet, thereby preventing the hub from continuing to rotate and releasing the rope, thus preventing the person from continuing to fall.

[0004] While the existing fall arrestor can prevent people from falling, the ratchet and hub inside the fall arrestor are both installed on the main shaft that is fixed inside the housing. In order to fix the ratchet inside the housing, it is inevitable to increase the length of the main shaft. This design makes it impossible to reduce the length of the main shaft and the volume of the housing, and thus cannot effectively reduce the size of the fall arrestor. Summary of the Invention

[0005] In view of this, the purpose of this utility model is to provide a fall arrestor in which a stopping element with a stopping and braking assembly is arranged in the longitudinal direction of the braking assembly, thereby reducing the length of the main shaft and the volume of the housing, and miniaturizing the size of the fall arrestor.

[0006] To achieve the above objectives, this utility model provides a fall arrestor, comprising a rotating shaft and including a housing, a ring assembly, a stop element, and a core device. The housing has an internal mounting space, with side walls on both sides along the axial direction of the rotating shaft, and a circumferential wall connecting the two side walls. A fixing seat is formed at the top of the circumferential wall, and an insertion groove is formed between the fixing seat and one of the side walls. A fixing surface is formed on the fixing seat, facing the insertion groove. An outlet is formed at the bottom of the circumferential wall, communicating with the mounting space. The ring assembly is attached to the top of the housing. The stop element is attached to the fixing surface and protrudes downwards from the fixing seat at its bottom, with a locking tooth formed at the bottom of the stop element.

[0007] The core device includes a main shaft, a hub, a spiral spring, a rope, and a braking assembly. The main shaft is fixed within the mounting space, and the rotation axis is the center line of the main shaft. The hub is rotatably fitted around the main shaft, and one side of the hub has a mounting portion with a spiral spring chamber inside. The spiral spring is disposed in the spiral spring chamber and connected between the main shaft and the hub. One end of the rope is attached to the hub, and the rope is wound around the hub in a releasable manner in multiple turns, with the other end of the rope exiting through the outlet. The braking assembly is attached to the mounting portion, and a plurality of pawl blocks are provided around the braking assembly. When the rotational speed of the plurality of pawl blocks exceeds a predetermined speed as the hub rotates, one of the pawl blocks engages with the locking teeth.

[0008] The advantage of this invention lies in the fact that, by integrating the stopping element with the fixed seat within the housing, the bottom of the stopping element forms a locking tooth that can engage with one of the plurality of ratchet blocks, and the stopping element is located approximately in the longitudinal direction of the braking assembly. Therefore, this invention eliminates the need for a ratchet or similar braking structure in the axial direction of the main shaft for engagement with the braking assembly, thus reducing the length of the main shaft and the volume of the fall arrester. Attached Figure Description

[0009] Figure 1 This is a perspective view of a preferred embodiment of the present invention.

[0010] Figure 2 This is an exploded view of the preferred embodiment of the present invention.

[0011] Figure 2A for Figure 2 Enlarged view of point 2A.

[0012] Figure 3 This is an exploded view of the side panel on the right side of the outer casing of the preferred embodiment of the present invention.

[0013] Figure 4 This is a side view of the preferred embodiment of the present invention.

[0014] Figure 5 for Figure 4 A cross-sectional view along the 5-5 direction.

[0015] Figure 6 for Figure 4 A cross-sectional view along the 6-6 direction.

[0016] Figure 7 This is a top view of the preferred embodiment of the present invention.

[0017] Figure 8 for Figure 7A cross-sectional view along the 8-8 direction.

[0018] Explanation of reference numerals in the attached figures

[0019] 100: Fall arrestor

[0020] 10: Outer shell

[0021] 12: Perimeter wall panel

[0022] 121: End Edge

[0023] 122: Zhou Bi

[0024] 123: Tube seat

[0025] 124: Through hole

[0026] 125: Exports

[0027] 14: Side panels

[0028] 141: Sidewall

[0029] 142: Side hole

[0030] 143: First assembly perforation

[0031] 144: Second assembly perforation

[0032] 16: Fixture

[0033] 161: Fixed surface

[0034] 162: Through hole

[0035] 163: Positioning pin

[0036] 164: Slot

[0037] 165: Vertical hole

[0038] 18: First fixed element

[0039] 19: Second fixing element

[0040] 20: Lifting ring assembly

[0041] 22: Support plate

[0042] 221: Piercing of the hanger rod

[0043] 24: Hanger rod

[0044] 241: hook part

[0045] 26: Rings

[0046] 30: Stopping element

[0047] 32: Fixing plate

[0048] 321: Positioning hole

[0049] 322: Fixing hole

[0050] 34: Clogged teeth

[0051] 36: Convex plate

[0052] 40: Core Device

[0053] 42: Spindle

[0054] 44: Hub

[0055] 441: Installation Department

[0056] 442: Scroll Spring Chamber

[0057] 46: Spiral Spring

[0058] 48: Rope body

[0059] 49: Braking components

[0060] 491: Ratchet Block

[0061] 491A: Base

[0062] 491B: Claws

[0063] 492: Installation panel

[0064] 4921: Ratchet Groove

[0065] 493: Compression Spring

[0066] L: Rotation axis

[0067] S: Installation space

[0068] S1: Insertion slot Detailed Implementation

[0069] To more clearly illustrate this utility model, preferred embodiments are described in detail below with reference to the accompanying drawings. Please refer to... Figures 1 to 6 The image shows a preferred embodiment of the fall arrestor 100 of this utility model. The following description of the structure of the fall arrestor 100 will describe its relative positions in the up-down, left-right, and front-back directions in the state of use. The fall arrestor 100 has a rotating shaft L extending in the left-right direction and includes a housing 10, a ring assembly 20, a stop element 30, and a core device 40, wherein:

[0070] The outer casing 10 includes a peripheral wall panel 12 and two side panels 14. Each of the left and right edges of the peripheral wall panel 12 forms an end edge 121, and the peripheries of the two side panels 14 are respectively connected to the end edges 121, such that the peripheral wall panel 12 and the two side panels 14 together enclose and form an installation space S. The inner surface of the peripheral wall panel 12 forms a peripheral wall 122, and the inner surface of each side panel 14 forms a side wall 141. The two side walls 141 are formed on both sides of the installation space S along the axial direction of the rotation axis L, and the peripheral wall 122 is connected between the two side walls 141.

[0071] A fixing seat 16 is formed on the bottom side of the top of the peripheral wall plate 12. The fixing seat 16 is located at the top of the mounting space S, and the length of the fixing seat 16 along the axial direction of the rotation axis L is less than the length of the peripheral wall plate 12 along the axial direction of the rotation axis L. An insertion groove S1 is formed between the fixing seat 16 and one of the side walls 141, and a fixing surface 161 is formed on the side of the fixing seat 16 facing the corresponding side wall 141. In this preferred embodiment, the fixing surface 161 is perpendicular to the axial direction of the rotation axis L. The fixing seat 16 has a through hole 162 on each of its front and rear sides, and the extending direction of each through hole 162 is parallel to the axial direction of the rotation axis L.

[0072] A positioning pin 163 is provided in the middle of the fixed base 16, and the positioning pin 163 protrudes from the fixed surface 161. A slot 164 is formed at the bottom of the fixed base 16, and a vertical hole 165 is formed at the top of the peripheral wall plate 12 and the fixed base 16. The vertical hole 165 extends vertically through the top of the peripheral wall plate 12 and the middle of the fixed base 16, and the bottom end of the vertical hole 165 communicates with the slot 164. A plurality of tube seats 123 are formed on the peripheral wall 122, and each tube seat 123 has a through hole 124. The direction of extension of each through hole 124 is parallel to the axial direction of the rotation axis L. An outlet 125 is formed at the bottom of the peripheral wall plate 12, and the outlet 125 communicates with the mounting space S.

[0073] Each side plate 14 has a side hole 142 in the middle. The side hole 142 of the left side plate 14 is a circular hole, while the side hole 142 of the right side plate 14 is a non-circular hole. Each side plate 14 has two first assembly through holes 143 at its top, located at the front and rear positions of the top of the side plate 14. Each first assembly through hole 143 is directly opposite to each through hole 162 along the axial direction of the rotation axis L. A second assembly through hole 144 is formed on the periphery of each side plate 14 corresponding to each through hole 124, and each second assembly through hole 144 is directly opposite to each through hole 124 along the axial direction of the rotation axis L.

[0074] A first fixing element 18 is inserted through each of the through holes 162 and each of the first assembly through holes 143 on both sides, with a portion of each first fixing element 18 protruding from the fixing surface 161. A second fixing element 19 is inserted through each of the through holes 124 and each of the second assembly through holes 144 on both sides, and each of the first fixing elements 18 and each of the second fixing elements 19 has a rivet structure. The two side plates 14 are riveted together to the left and right sides of the peripheral wall plate 12 by means of the first fixing elements 18 and each of the second fixing elements 19. In other preferred embodiments, the first fixing elements 18 and each of the second fixing elements 19 may also be configured as a combination of bolts and nuts to fasten the two side plates 14 to the left and right sides of the peripheral wall plate 12 by means of screws.

[0075] The lifting ring assembly 20 includes a support plate 22, a lifting rod 24, and a lifting ring 26. The support plate 22 is a rectangular plate, fixedly inserted into the slot 164. A lifting rod through-hole 221 is located in the center of the support plate 22, directly below the vertical hole 165. The lifting rod 24 is a vertically arranged straight rod. The lower half of the lifting rod 24 passes through the vertical hole 165, and the lower end of the lifting rod 24 extends downward through the lifting rod through-hole 221 of the support plate 22. A hook 241, a circular plate, is connected to the periphery of the lower end of the lifting rod 24, engaging with the periphery of the lower end of the lifting rod through-hole 221. The upper end of the lifting rod 24 extends upward through the top of the peripheral wall plate 12, and the lifting ring 26 is attached to the upper end of the lifting rod 24.

[0076] The stopping element 30 includes a fixing plate 32, a retaining tooth 34, and two protruding plates 36. The fixing plate 32 has a positioning hole 321 in the middle, which is fitted with the positioning pin 163. The fixing plate 32 has a fixing hole 322 on each of its front and rear sides. Each fixing hole 322 is aligned with the through hole 162 along the axial direction of the rotation axis L. Each fixing hole 322 is fitted with the portion of each first fixing element 18 that protrudes from the fixing surface 161, thus allowing the stopping element 30 to be connected to the fixing surface 161 via the fixing plate 32. The two protruding plates 36 are respectively connected to the front and rear edges of the fixing plate 32. Each protruding plate 36 protrudes from the fixing plate 32 toward the corresponding sidewall 141, and each protruding plate 36 abuts against the corresponding sidewall 141, so that the fixing plate 32 remains in contact with the fixing surface 161. The bottom of the fixing plate 32 protrudes downward from the fixing seat 16, and the locking teeth 34 are integrally connected to the bottom of the fixing plate 32.

[0077] Please refer to Figure 2 and Figures 5 to 8As shown, the core device 40 includes a main shaft 42, a hub 44, a spiral spring 46, a rope 48, and a braking assembly 49. The two ends of the main shaft 42 are respectively inserted into the side holes 142, fixing the main shaft 42 within the mounting space S. The rotation axis L is the center line of the main shaft 42. The hub 44 is rotatably fitted around the main shaft 42. One side of the hub 44 has a mounting portion 441, and the interior of the hub 44 contains a spiral spring chamber 442. The spiral spring 46 is disposed within the spiral spring chamber 442, and its two ends are respectively connected to the main shaft 42 and the hub 44.

[0078] One end of the rope 48 is attached to the hub 44, and the rope 48 is wound around the hub 44 in a releasable manner in multiple turns. The other end of the rope 48 exits through the outlet 125 of the housing 10. The braking assembly 49 is attached to the mounting portion 441 and includes a plurality of pawl blocks 491. In this preferred embodiment, the braking assembly 49 includes a mounting disc 492 and two pawl blocks 491. The mounting disc 492 is attached to the mounting portion 441 of the hub 44, and each of the opposite circumferential sides of the mounting disc 492 has a pawl groove 4921. Each of the pawl blocks 491 is accommodated in each of the pawl grooves 4921. Each of the pawl blocks 491 includes a base 491A and a claw portion 491B connected to the base 491A. The base 491A of each of the pawl blocks 491 is rotatably coupled to the mounting plate 492. A compression spring 493 is abutted between the base 491A of each of the pawl blocks 491 and the wall surface of each of the pawl grooves 4921. Each of the compression springs 493 applies a biasing elastic force to each of the pawl blocks 491, so that each of the pawl blocks 491 is in a closed state when no external force is applied. At this time, the claw portion 491B of the pawl block 491 is accommodated in the corresponding pawl groove 4921.

[0079] When the rope 48 is pulled outward from the outlet 125 by an external force, the rope 48 will drive the hub 44 to rotate around the main shaft 42 as the rotation center. The rotation direction of the hub 44 at this time is defined as forward rotation. Conversely, when the pulling force that pulls the rope 48 outward no longer exists, the spiral spring 46 provides a restoring force for the hub 44 to rotate back to its original position. At this time, the hub 44 will rotate in the opposite direction and rewind the outward rope 48 back into the outer casing 10.

[0080] When the rope 48 is pulled outward and the speed at which the rope 48 drives the hub 44 to rotate forward exceeds a predetermined speed, the centrifugal force experienced by the plurality of pawl blocks 491 as the hub 44 rotates exceeds the elastic force of the compression springs 493 biasing each pawl block 491. At this time, the pawl portions 491B of each pawl block 491 will open outward, causing the trajectory of the plurality of pawl blocks 491 rotating with the hub 44 to interfere with the position of the locking teeth 34. This causes the pawl portion 491B of one of the pawl blocks 491 that has rotated to the top to engage with the locking teeth 34, at which point the hub 44 immediately stops rotating. When the hub 44 stops rotating, it also stops releasing the rope 48 outward. Since there is no centrifugal force, the other pawl block 491 located below will be pushed by the corresponding compression spring 493, returning from the outwardly open state to the closed state.

[0081] Conversely, when the rope 48 is pulled outward at a slow rotational speed lower than the predetermined rotational speed, the claws 491B of the plurality of pawl blocks 491 will not open to engage with the locking teeth 34. Thus, when the outer casing 10 is suspended at a fixed point by the sling 26, and the other end of the rope 48 extending from the outlet 125 is connected to a harness worn by the user, the fall arrestor 100 can prevent the user from falling continuously when falling from the air. However, under normal conditions, the rope 48 extending outward from the fall arrestor 100 can be pulled out by hand or body movement, and when the user does not continuously pull the rope 48 outward, the hub 44 can rewind the rope 48, preventing the excessively long rope 48 from hindering the user's work.

[0082] The advantage of this invention lies in the fact that, since the stopping element 30 is integrated with the fixing seat 16 within the housing 10, and the bottom of the stopping element 30 forms the locking tooth 34 for engagement with one of the plurality of ratchet blocks 491, this invention eliminates the need for a ratchet or similar braking structure to engage with the braking assembly 49 along the axial direction of the main shaft 42. Therefore, compared to a structure that requires a ratchet to be mounted on the main shaft 42, this invention reduces the length of the main shaft 42 and the volume of the housing 10 along the rotation axis L. This not only allows for miniaturization of the fall arrestor 100 but also reduces its weight.

[0083] The above description is only a preferred and feasible embodiment of this utility model. Any equivalent changes made by applying the specification and claims of this utility model should be included within the patent scope of this utility model.

Claims

1. A fall arrestor, characterized in that, It has a rotation axis and includes: An outer casing has an internal mounting space. The mounting space has a side wall on each side along the axial direction of the rotation axis, and a peripheral wall connects the two side walls. A fixing seat is formed at the top of the peripheral wall, and an insertion groove is formed between the fixing seat and one of the side walls. A fixing surface is formed on the fixing seat, and the fixing surface faces the insertion groove. An outlet is formed at the bottom of the peripheral wall, and the outlet communicates with the mounting space. A lifting ring assembly is attached to the top of the housing; A stop element, coupled to the fixing surface and protruding downward from the fixing seat, having a retaining tooth formed at the bottom of the stop element; and A core device includes a main shaft, a hub, a spiral spring, a rope, and a braking assembly. The main shaft is fixed within the mounting space, and the rotation axis is the center line of the main shaft. The hub is rotatably fitted around the main shaft, and one side of the hub has a mounting portion with a spiral spring chamber inside. The spiral spring is disposed in the spiral spring chamber and connected between the main shaft and the hub. One end of the rope is attached to the hub, and the rope is wound around the hub in a releasable manner in multiple turns, with the other end of the rope exiting through the outlet. The braking assembly is attached to the mounting portion, and a plurality of pawl blocks are provided around the braking assembly. When the rotational speed of the plurality of pawl blocks as the hub rotates exceeds a predetermined speed, one of the pawl blocks engages with the locking teeth.

2. The fall arrestor as described in claim 1, wherein, The stopping element has a fixing plate, which is attached to the fixing surface, and the locking teeth are integrally connected to the fixing plate.

3. The fall arrestor as described in claim 2, wherein, Each side of the fixing base has a through hole, and the direction of each through hole is parallel to the axis of the rotating shaft. A first fixing element is inserted through each through hole, and a portion of each first fixing element protrudes from the fixing surface. Each side of the fixing plate has a fixing hole, and each fixing hole is aligned with the through hole along the axis of the rotating shaft. Each fixing hole is fitted with the portion of each first fixing element that protrudes from the fixing surface.

4. The fall arrestor as described in claim 3, wherein, A positioning pin is provided on the fixed surface, and the fixed plate has a positioning hole, which is fitted with the positioning pin.

5. The fall arrestor as described in claim 2, wherein, A protruding plate is connected to each of the two sides of the fixing plate. Each protruding plate protrudes from the fixing plate toward the corresponding side wall and abuts against the corresponding side wall so that the fixing plate is kept in a state of being in contact with the fixing surface.

6. The fall arrestor as claimed in claim 1, wherein, The outer casing includes a peripheral wall panel and two side panels; the fixing seat is formed on the bottom side of the top of the peripheral wall panel, the peripheral wall is formed on the inner surface of the peripheral wall panel, each of the two sides of the peripheral wall panel has an end edge, and the periphery of the two side panels is connected to each of the end edges; each side wall is formed on the inner surface of each of the side panels, and each of the side panels has a side hole in the middle, and the two ends of the main shaft are respectively fixed to each of the side holes; the mounting space is surrounded by the peripheral wall panel and the two side panels.

7. The fall arrestor as described in claim 6, wherein, A slot is formed at the bottom of the fixing seat, and a vertical hole is formed at the top of the peripheral wall plate and the fixing seat, the vertical hole communicating with the slot; the lifting ring assembly includes a support plate, a lifting rod and a lifting ring, wherein the support plate is inserted into the slot and the support plate has a lifting rod through hole in the middle, the lifting rod passes through the vertical hole and the lower end passes through the lifting rod through hole, a hook is connected to the periphery of the lower end of the lifting rod, the hook engages with the periphery of the lower end of the lifting rod through hole, and the lifting ring is attached to the upper end of the lifting rod.

8. The fall arrestor as described in claim 6, wherein, The fixing base has a through hole on each of its front and rear sides, and the direction of each through hole is parallel to the axis of the rotating shaft; the top of each side plate has two first assembly through holes, and each first assembly through hole is directly opposite the through hole along the axis of the rotating shaft. A first fixing element is inserted through each through hole and each of the first assembly through holes on both sides, and a portion of each first fixing element protrudes from the fixing surface; the stop element has a fixing hole on each of its front and rear sides, and each fixing hole is fitted with the portion of each first fixing element that protrudes from the fixing surface.

9. The fall arrestor as described in claim 6, wherein, Multiple tube seats are formed on the peripheral wall, each tube seat has a through hole, and a second assembly through hole is formed on the periphery of each side plate corresponding to each through hole. A second fixing element is inserted through each through hole and each second assembly through hole on both sides, and the two side plates are joined to the two sides of the peripheral wall plate by the second fixing elements.

Images