Fall arrest device

Abstract

A fall arrest device for arresting a rope when a relative velocity between the rope and the device (10) reaches a threshold value, the device comprising an arresting mechanism (23) for arresting the rope and a trigger mechanism (30) configured to trigger an activation lever (24) of the arresting mechanism for activating the arresting mechanism (23) when the velocity reaches the threshold value, wherein the trigger mechanism (30) comprises a drive shaft which is rotated by the rope when a relative movement between the rope and the fall arrest device (10) occurs, the drive shaft carrying a centrifugal weight holder, wherein at least one centrifugal weight (36, 38) is held against a restoring force of a spring (28), wherein the at least one centrifugal weight (36, 38) is movable between a non-activation position and a trigger position for triggering the activation lever (24) when the velocity reaches the threshold value. The centrifugal weight holder is rotatably arranged relative to a release gear (48), the release gear comprising a toothing (72, 74) which is engageable by an actuator member of the at least one centrifugal weight (36, 38) when the at least one centrifugal weight (36, 38) is in the trigger position.

Description

Technical Field

[0001] This invention relates to a fall arrest device for blocking a rope when the relative speed between a rope and a device reaches a threshold. The device includes a blocking mechanism and a triggering mechanism. The blocking mechanism blocks the rope, and the triggering mechanism is configured to trigger an actuation rod of the blocking mechanism to activate the blocking mechanism when the speed reaches the threshold. The triggering mechanism includes a drive shaft that is rotated by the rope during relative movement between the rope and the fall arrest device. The drive shaft carries a centrifugal weight support, wherein at least one centrifugal weight is held to resist restoring force. The at least one centrifugal weight is movable between a non-activated position and a triggered position to trigger the actuation rod when the speed reaches the threshold. Background Technology

[0002] This fall arrestor is already known to the public because the applicant has publicly advertised it under the trade name Blocstop. TM This fall protection device is for sale.

[0003] Blocstop TM A triggering mechanism employs two centrifugal weights, eccentrically positioned on a centrifugal weight support. When the descent speed between the rope and the Blocstop reaches a threshold, the outer portion of the weight engages with the actuating lever of the blocking mechanism. Then, one outer portion of the centrifugal weight moves under centrifugal force to engage the actuating lever after a certain angular travel. Depending on the position of the centrifugal weight relative to the actuating lever during its triggering, the centrifugal weight can achieve a large rotational angle before the blocking mechanism is actuated.

[0004] This is a somewhat undesirable situation because, ideally, the activation of the blocking mechanism should not depend heavily on the specific location of the device. Therefore, while known devices are used to automatically stop and hold suspended equipment on ropes, such as suspended entry devices (SAEs), to prevent malfunctions such as rope breakage or gear breakage, these known devices are not entirely replicable. The time lag of device activation may vary depending on the specific location of the centrifugal load during activation.

[0005] Similar fall arrest devices are known from US 2004 / 0020727 A1 and US 2005 / 0082115 A1, which have similar drawbacks.

[0006] From EP 3 278 840 A1, a fall protection device suitable for connection to a safety harness is known. It includes a frame forming a receiving space, a shaft disposed on the frame, a delay member, and a rotating drum. The delay member is pivotally disposed on the shaft, which is received in the receiving space and has a friction surface. The rotating drum is mounted around the delay member and has an outer surface and an inner surface. The outer surface can be wrapped with the safety harness, and the inner surface faces the friction surface. If the safety harness reaches a certain descent speed, a centrifugal weight supported on a centrifugal weight support will trigger friction braking.

[0007] EP3 574 958 A1 discloses a device for automatically lowering a rope after a fall has stopped. The device includes a ratchet that cooperates with two ratchet elements arranged to rotate outwards to engage the ratchet when a certain threshold speed for rope descent is reached, thereby achieving a braking operation. Thereafter, the ratchet can disengage to achieve a braked descent of the rope, thus enabling controlled descent.

[0008] DE 10 2011 106 636 A1 discloses a ring cable crane comprising a working cable, a safety cable, and a drive cable pulley, the working cable being wound around at least a portion of the drive cable pulley. A drive mechanism for driving the drive cable pulley and a non-drive safety cable pulley is provided, the drive mechanism being rotatably mounted in a housing, around which the safety cable is wound. A stopping device is provided comprising a ratchet cooperating with a ratchet element, the ratchet element engaging with the ratchet when the ratchet rotates at a certain threshold speed. This activates a friction brake, which blocks and brakes the safety cable. Summary of the Invention

[0009] In view of this, one object of the present invention is to disclose an improved fall arrest device for blocking the rope when the descent speed between the rope and the device reaches a threshold, wherein when the speed of the rope reaches the threshold, a triggering mechanism causes a rapid triggering action, which is largely independent of the position of the device during activation.

[0010] This objective is achieved by the fall arrest device as described in claim 1.

[0011] Thus, the purpose of this invention has been fully achieved.

[0012] By using a release gear that includes teeth that can be engaged by an actuator component of at least one centrifugal weight, the activation of the blocking mechanism is largely independent of the angular position of the centrifugal weight when the blocking mechanism is activated.

[0013] According to a further development of the invention, the starter lever can be pivotally arranged around an axis located at a certain distance outside the release gear.

[0014] According to a further development of the invention, the actuating lever includes a first end that engages with the external teeth of the release gear, wherein when the actuating lever is in an open position corresponding to the non-starting position of the triggering mechanism, the actuating lever preferably engages the external teeth with the first end.

[0015] According to a further development of the present invention, the actuating rod includes a second end, which includes a gripping portion that engages with the gripping roller when in the open position. When the triggering mechanism is triggered, the gripping roller moves from the open position to the closed position via the external teeth, thereby activating the blocking mechanism by releasing the gripping roller.

[0016] According to a further development of the invention, the gripping portion at the second end of the actuating lever is configured as a claw that engages the recess of the gripping roller when in the open position, the claw being released from the recess of the gripping roller when the triggering mechanism is activated.

[0017] According to a further development of the invention, at least one centrifugal weight is pivotally arranged about a rotation axis located on a centrifugal weight support. The at least one centrifugal weight resists the restoring force of a spring, and when the drive shaft rotates, the at least one centrifugal weight can move from a non-starting position to a triggering position so as to trigger the starting lever when the restoring force of the spring is overcome when the threshold is reached.

[0018] According to a further development of the invention, each centrifugal weight carries an actuator component that engages with the internal teeth of a release gear, such that the teeth are rotated by the actuator component when a threshold is reached.

[0019] All of these features contribute to achieving a simple and reliable design.

[0020] According to a preferred embodiment of the present invention, the tooth portion includes a plurality of teeth, the plurality of teeth including at least eight teeth, preferably at least sixteen teeth, and more preferably twenty-four teeth.

[0021] Using a greater number of teeth can shorten the trigger time of the blocking mechanism, regardless of the angular position of at least one centrifugal weight.

[0022] According to another development of the invention, two centrifugal weights are provided, which are eccentrically held on a centrifugal weight support to resist the restoring force of the spring.

[0023] This leads to simple construction and balanced behavior.

[0024] According to another development of the invention, each of the centrifugal weights is pivotally arranged about a rotation axis that is eccentrically arranged on the centrifugal weight support.

[0025] This allows for simple construction.

[0026] According to another development of the invention, each centrifugal weight has a pin that engages with a slot provided in a bracket that extends through the centrifugal weight.

[0027] This feature helps with uniform triggering, regardless of whether the centrifugal weight moves outward first.

[0028] According to another development of the invention, each centrifugal weight includes an actuator member configured as an actuator pin, which is arranged to engage the internal teeth of a release gear when at least one centrifugal weight is in a triggered position.

[0029] This allows the rotational motion to be easily transferred from the load holder to the release gear.

[0030] According to another development of the invention, the release gear includes an external tooth that engages with an actuating rod for rotating the actuating rod to a position for actuating the blocking mechanism when at least one centrifugal weight is in the trigger position.

[0031] According to a further development of the invention, each of the centrifugal weights has a generally semi-cylindrical shape, which is pivotally supported at one end against the restoring force of a spring about a rotation axis, the spring biasing the centrifugal weights toward each other.

[0032] These features contribute to simple and reliable construction.

[0033] According to another embodiment of the invention, the release gear is combined with a load-bearing disc rotatably mounted on the drive shaft. It can be fixed to the load-bearing disc or integrated with it.

[0034] In addition, this feature helps to achieve simple and reliable designs. Attached Figure Description

[0035] It will be understood that the features described above and those mentioned below can be used not only in their respective given combinations, but also in different combinations or independently. Other features and advantages of the invention will become apparent from the following description with reference to the accompanying drawings. As shown in the drawings:

[0036] Figure 1 This is a perspective view of the fall arrest device according to the present invention;

[0037] Figure 2 This is a side view of the fall arrest device according to claim 1;

[0038] Figure 3 It is based on Figure 1 The fall arrestor is shown in a top view with the device in the open position;

[0039] Figure 3a It is based on Figure 3 The fall arrestor is shown in the activated position;

[0040] Figure 4 It is based on Figure 2 The diagram shows a cross-sectional view of the fall arrestor in the open position along line IV-IV.

[0041] Figure 4a It is based on Figure 4 However, it is shown as a cross-sectional view in a closed position;

[0042] Figure 5 It is based on Figure 2 The diagram shows a cross-sectional view of the fall arrestor in the open position along line VV.

[0043] Figure 5a It is based on Figure 5 However, the fall arrestor is shown in the closed position;

[0044] Figure 6 It is based on Figure 2 The fall arrestor is shown in a cross-sectional view along line VI-VI;

[0045] Figure 7 It is based on Figure 3 The fall arrestor is shown in the cross-sectional view along line VII-VII;

[0046] Figure 8 According to the following after removing the top cover Figure 1 The fall arrestor shown is in the open position;

[0047] Figure 9 It is based on Figure 8 Enlarged view of the circled part;

[0048] Figure 10 It is based on Figure 8 The anti-fall device is shown in the open position after the centrifugal weight has been removed from the centrifugal weight support and after the upper part of the housing has been removed.

[0049] Figure 11 This is a cross-sectional view of the fall arrestor in the open position, taken from the plane directly above the release gear;

[0050] Figure 11a It is based on Figure 11 The diagram shown is a cross-sectional view of the fall arrestor in the closed position;

[0051] Figure 12 Blocstop is a fall arrestor based on existing technology. TM A top view, in accordance with Figure 11aThe apparatus of the present invention is illustrated similarly; and

[0052] Figure 13 This is a perspective view of another embodiment, showing the relationship with... Figure 8 Slightly different design. Detailed Implementation

[0053] exist Figure 1 In the figure, the fall protection device according to the invention is shown in perspective view and is generally indicated by reference numeral 10.

[0054] Fall arrestor 10 is provided as a safety measure for the automatic stopping and holding of suspended equipment, such as a suspended entry device (SAE) suspended on a rope. According to Figure 1 The fall arrestor 10 only blocks the rope 12 when it rises at a certain threshold speed relative to the fall arrestor 10, and vice versa, when the fall arrestor 10a falls at least at a threshold speed relative to the rope 12.

[0055] exist Figure 1 In the image, rope 12 is shown being guided through fall arrestor 10. A sleeve 19 is visible on the underside of fall arrestor 10, from which rope 12 protrudes.

[0056] The fall arrestor 10 includes a housing 14 and a top cover 16, on which a handle 18 is visible. The handle 18 can be manually switched between the blocked position and the open position shown on the top cover 16. However, this manual switching is only possible when the fall arrestor 10 is not under load.

[0057] A side view of the fall arrestor 10 is shown below. Figure 2 As shown. It can be seen that... Figure 1 Same features. In addition, another sleeve 20 can be seen only at the right end of the fall arrestor 10, through which the rope 12 (not shown) enters the device 10 and exits the device 10 through another sleeve 19 on the left (or the lower side during application).

[0058] The fall arrestor 10 according to the present invention includes a blocking mechanism, which can be used to prevent falls. Figure 4 and Figure 5 The figures observed are generally indicated by reference numeral 23. Figure 4 The obstruction mechanism 23 that can be observed in the middle is similar to the obstruction mechanism Blocstop, which is already well known for its public use. TM They are basically the same.

[0059] The blocking mechanism 23 works in conjunction with the triggering mechanism 30, which constitutes a novel and inventive part of the fall arrest device 10.

[0060] The trigger mechanism 30 includes a drive shaft 32, which can... Figure 4 and Figure 5 I saw it in the middle, but Figure 6 This is especially evident in the middle. The drive shaft 32 has a drive roller 68 (see...) Figure 6 The drive roller cooperates with the pressure roller 70, which is pressed from the outside by a pressure spring 71 against a rope 12 (not shown) extending between the two sleeves 19 and 20 (see...). Figure 7 Therefore, any movement of the rope 12 relative to the fall arrestor 10 results in the rotation of the drive shaft 32.

[0061] At the upper portion of the drive shaft 32, there is a load-bearing plate 49 that can rotate freely relative to the drive shaft 32 (see...). Figure 6 A rigidly fixed release gear 48 is located on top of the load-bearing plate 49 (see...). Figure 6 and Figure 4 The release gear 48 has an external toothed portion 72 comprising twenty-four teeth. Figure 4 The position shown indicates that the first end 26 of the actuating rod 24 of the external gear engagement blocking mechanism 23 is located at the position indicated. The actuating rod 24 is pivotally mounted about a shaft 25 (see [reference needed]). Figure 4 , 8 And 10). Depending on the position of the actuating lever 24, its first end 26 can engage with the external teeth 72 of the release gear 48 (e.g., Figure 4 (as shown), or it can disengage, such as Figure 4a As shown. If the first end 26 of the starting lever 24 engages with the external toothed part 72 (as shown). Figure 4 As shown), this is the open position of the blocking mechanism 23, in which the rope 12 can pass freely through the fall arrestor 10 without any obstruction or braking action.

[0062] The second end of the actuating lever 24, opposite to the first end 26, has a curved gripping portion 80 that mates with the gripping roller 82 (see...). Figure 8 The gripping roller 82 is held at the lower end of the rod 21, which is supported on the shaft 22, and the handle 18 is fixed at the upper end of the shaft 22. The handle 18 allows the fall arrestor 10 to be manually moved as follows: Figure 3 The open position shown is only feasible when the fall arrestor 10 is not engaged. Throughout the figures, the open position of the fall arrestor is indicated by 10, while the closed position where blocking or braking action occurs is indicated by 10'.

[0063] A spring 28 engaging the starter lever 24 at the side of the first end 26 pulls the starter lever 24 to the open position, wherein the first end 26 engages the external teeth 72 of the release gear 48.

[0064] The triggering mechanism 30 includes two centrifugal weights 36 and 38, which are fixed to a centrifugal weight support 34, which is rigidly fixed to the drive shaft 32. The centrifugal weights 36 and 38 have a generally semi-cylindrical shape and are eccentrically attached at one end to a rotation axis 35 and 37 (see...). Figure 4 Centrifugal weights 36 and 38 can rotate outward under centrifugal force during rotation. Each centrifugal weight 36 and 38 includes pins 43 and 44 extending within slots 45 and 46 of a compensating bracket 42, which extends through both centrifugal weights 36 and 38. The compensating bracket is centered relative to the drive shaft 32.

[0065] A tension spring 40 is fixed between the two pins 43 and 44. Therefore, when the drive shaft 32 rotates, the centrifugal weights 36 and 38 are pushed outwards, but they cannot move as long as the centrifugal force cannot overcome the biasing force of the tension spring 40. If the relative speed between the rope 12 and the device 10 reaches a threshold, the two centrifugal weights 36 and 38 will overcome the biasing force of the tension spring 40 and move outwards, causing the pins 43 and 44 to move within the corresponding slots 45 and 46 of the compensating bracket 42.

[0066] Especially from Figure 8 , 9 As can be seen from 11.11a, the release gear 48 also includes an internal toothed portion 74 with twenty-four teeth. The centrifugal weights 36 and 38 each have an actuator pin 76 or 78 (see details). Figure 8 and 9 The actuator pin is located near the end opposite to its rotation axis 35, 37. The actuator pins 76, 78 engage with the internal teeth 74 of the release gear 48. When the relative speed between the rope 12 and the device 10 reaches a threshold, thus overcoming the restoring force of the tension spring 40, the centrifugal weights 36, 38 rotate outward, thereby engaging the internal teeth 74 of the actuator pins 76, 78.

[0067] It is worth noting that the internal toothed portion 74 is designed with inclined teeth, which are configured such that engagement with the actuator pins 76, 78 only occurs when the rope 12 moves upward relative to the fall arrestor 10, or when the fall arrestor 10 moves downward relative to the rope 12.

[0068] Therefore, when the trigger mechanism 30 is activated, the actuator pins 76 and 78 engage with the internal gear 74, thereby moving the release gear 48 in the release direction (clockwise in this case), thus overcoming the action of the spring 28 to release the actuating rod 24 from the spring. Figure 4 The engagement position with the external tooth 72 shown is moved to the closed position (in this case, the right side) to actuate the blocking mechanism 23. Therefore, the blocking mechanism 23 moves to... Figure 4a , 5a The closed position is shown, where the device is indicated by 10'.

[0069] As in Figure 11a It can be seen in and Figure 3a , Figure 4a and Figure 5a As can also be seen, lever 21 moves thereby, releasing the gripping roller 82 from the gripping portion 80 of the actuating lever 24. The blocking mechanism 23 includes two brake lever pairs 52 and 54, which... Figure 4 , Figure 5 , Figure 4a and Figure 5a You can see and in Figure 10 This can also be seen in the diagram. Brake levers 52 and 54 mate with brake pads 51 and 56. This is to allow movement of the brake pads (one of which, 51, can...). Figure 7 As seen in the image, brake levers are arranged in pairs of brake levers 52 and 54, one above brake pads 51 and 56, and the other below brake pads 51 and 56. Each pair of brake levers 52 and 54 is pivotally held at one end about pivot axes 53 and 55. The end of the first brake lever pair 52 opposite to the pivot axis 53 is secured to a spring bracket using a control pin. A spring bracket 65 is pivotally attached at one end to a pivot axis 67 and carries a pressure spring 66 that pushes the first brake lever pair 52 towards... Figure 4a and 5a The direction of the closed position is shown. When the gripping roller 82 is released by the gripping part 80, the actuating lever 24 moves to... Figure 4a and 5a When the first brake lever 52 is in the closed position as shown, it moves to the position indicated by the pressure spring 66. Figure 5a The closed position is shown in the figure and indicated by the reference numeral 10'.

[0070] Due to brake pads 51, 56 (in) Figure 5 and Figure 5a As can be seen, the brake levers 54 and 54 move towards each other, achieving a blocking or braking effect as the control cams 57 and 60 of the second brake lever pair 54 and the control cams 58 and 59 of the first brake lever pair 52 move within their respective control slots 62 and 61. If one brake lever pair 52 moves, the other brake lever pair 54 also moves simultaneously, because the movement of control cams 58 and 59 within control slot 61 also causes control cams 57 and 60 to move within control slot 62. Through this action, brake pads 51 and 55 move against the rope 12 extending between sleeves 19 and 20 (the rope 12 only moves when...). Figure 1 (as shown in the image).

[0071] Therefore, under the action of the pressure spring 66 held on the spring bracket 65 and engaging with the first brake lever pair 52, the first brake lever pair 52 moves to the closed or braking position. Thus, the control lever 50 fixed to the shaft 22 (see...) Figure 5 , 5a And 10) also move upwards.

[0072] The control lever 50 (handle 18 attached to shaft 22) can be used when the fall arrestor 10 is not under load. Figure 3a , Figure 4a and Figure 5a The closing position shown is the same as Figure 3 , Figure 4 and Figure 5 Manually move the fall arrestor 10 between the shown open positions.

[0073] To function as a safety device at initial use, the handle 18 of the fall arrestor 10 is moved to... Figure 3 , Figure 4 and Figure 5 The open position is shown. Therefore, the first end 26 of the actuating lever 24 moves to engage with the outer tooth 72 of the release gear 48. The gripping roller 82 carried by the lever 21 also moves to the open position. Figure 8 The location shown.

[0074] Starting from this position, when the relative speed between the rope 12 and the device 10 reaches a threshold to overcome the restoring force of the tension spring 40, the triggering mechanism 30 will be activated.

[0075] Therefore, actuator pins 76 and 78 will engage the internal teeth 74 of the release gear 48 and rotate the release gear 48. Consequently, the external teeth 72 of the release gear 48 will move the actuating lever 24 from the open position to the open or closed position (see...). Figure 11 and 11a Therefore, the blocking mechanism 23 is moved to the blocking or braking position, thereby blocking the rope 12.

[0076] In order to Figure 12 Compared to existing fall arrest devices, Blocstop... TM With and according to Figure 11a The apparatus of the present invention is shown in similar illustrations.

[0077] The prior art fall arrestor 100 also includes a blocking mechanism 123, which includes an actuating rod 124 cooperating with a triggering mechanism 130. The triggering mechanism 130 includes two generally semi-circular centrifugal weights 136, 138, which are supported on a centrifugal weight support driven by a drive shaft if there is a relative velocity between the rope and the fall arrestor 100. The actuating rod 124 is pulled into an open position by a spring. The two centrifugal weights 136, 138 are biased towards each other by a spring 140. If the relative velocity between the rope and the fall arrestor 100 reaches a threshold, the force of the spring 140 is overcome, causing the centrifugal weights 136, 138 to rotate outward until one of the centrifugal weights 136, 138 engages the first end of the actuating rod 126. Thus, the blocking mechanism 123 is activated to block the rope.

[0078] exist Figure 13 In, with Figure 8 A perspective view similar to the embodiment shown in the figure, generally indicated by 10a, illustrates another design of the fall arrestor. The gripping roller is indicated by 82a, and the actuating lever by 24a. Apart from this, the same reference numerals are used previously regarding... Figures 1 to 11 Similar components as described above.

[0079] according to Figure 13 The fall arrestor 10a differs from the previously described embodiment in that the second end 27 of the actuating lever 24a has a claw 29, which, when in the position Figure 13 In the open position shown, the claw 29 engages with the latch recess 31 provided on the gripping roller 82a. When the centrifugal weights 36 and 38 overcome the restoring force of the spring 28, the trigger mechanism 30 is activated, and the external tooth 72 moves counterclockwise to resist... Figure 13 The spring shown acts to move the trigger mechanism 30 to the closed position (as described above regarding the first embodiment). Figures 1 to 11 As explained, the direction of movement is opposite; other components are rearranged accordingly to achieve the same function. Therefore, the second end 27 of the actuating lever 24a moves to the right, thereby releasing the gripping roller 82a and actuating the blocking mechanism 23.

Claims

1. A fall arrestor for blocking the rope (12) when the relative velocity between the rope (12) and the device (10) reaches a threshold value, the device (10) comprising: A blocking mechanism (23) is used to block the rope (12). and The triggering mechanism (30) is configured to trigger the actuation lever (24) of the blocking mechanism (23) when the speed reaches the threshold, so as to activate the blocking mechanism (23) to block the rope (12). The triggering mechanism (30) includes a drive shaft (32) that is rotated by the rope (12) when there is relative movement between the rope (12) and the fall arrestor (10). The drive shaft (32) rigidly fixes and carries the centrifugal weight support (34). At least one centrifugal weight (36, 38) is held in the centrifugal weight support to resist restoring force. The at least one centrifugal weight (36, 38) can move between a non-starting position and a triggering position to trigger the starting rod (24) when the speed reaches the threshold. The centrifugal weight support (34) is rotatably arranged relative to the release gear (48), the release gear including an internal tooth (74) configured to be engaged by the actuator component (76, 78) of the at least one centrifugal weight (36, 38) when the at least one centrifugal weight (36, 38) is in the trigger position. The actuating rod (24) is pivotally arranged around a shaft (25) located at a certain distance outside the release gear (48); The at least one centrifugal weight (36, 38) is pivotally arranged about a rotation axis (35, 37) located on the centrifugal weight support (34), and the at least one centrifugal weight resists the restoring force of the spring (40), and The at least one centrifugal weight (36, 38) is configured to move from the non-starting position to the triggering position as the drive shaft (32) rotates, so as to trigger the starter rod (24) when the threshold is reached and the restoring force of the spring (28) is overcome.

2. The fall arrestor as described in claim 1, characterized in that, The actuating rod (24) includes a first end (26) that engages with the external teeth (72) of the release gear (48), wherein when the actuating rod (24) is in the open position corresponding to the non-starting position of the triggering mechanism (30), the actuating rod (24) engages the external teeth (72) with the first end (26).

3. The fall arrestor as described in claim 2, characterized in that, The actuating rod (24) includes a second end (27) which includes a gripping portion (80, 29) that engages with the gripping rollers (82, 82a) when in the open position. When the triggering mechanism (30) is triggered, the gripping rollers (82, 82a) move from the open position to the closed position via the external teeth (72), thereby activating the blocking mechanism (23) by releasing the gripping rollers (82).

4. The fall arrestor as described in claim 3, characterized in that, The gripping portion of the second end (27) of the actuating rod is configured to engage the claw (29) of the recess (31) of the gripping roller (82a) when in the open position. The claw (29) is released from the recess (31) of the gripping roller (82a) when the triggering mechanism (30) is triggered, thereby activating the blocking mechanism (23).

5. The fall arrestor as described in claim 1, characterized in that, Each centrifugal weight (36, 38) carries an actuator component (76, 78) that engages with the internal teeth (74) of the release gear (48) such that the internal teeth (74) are rotated by the actuator component (76, 78) when the threshold is reached.

6. The fall arrestor as described in any one of claims 1-5, characterized in that, The internal tooth portion (74) includes a plurality of teeth, the plurality of teeth including at least eight teeth.

7. The fall arrestor as described in claim 1 or 5, characterized in that, Two centrifugal weights (36, 38) are held eccentrically on the centrifugal weight support (34) to resist the restoring force of the spring (40).

8. The fall arrestor as described in claim 7, characterized in that, Each of the centrifugal weights (36, 38) is pivotally arranged about a rotation axis (35, 37) that is eccentrically arranged on the centrifugal weight support (34).

9. The fall arrestor as described in claim 7, characterized in that, Each centrifugal weight (36, 38) is equipped with a pin (43, 44) that engages with a slot (45, 46) provided in a bracket (42) that extends through the centrifugal weight (36, 38).

10. The fall arrestor as described in any one of claims 1-5, characterized in that, Each centrifugal weight (36, 38) includes an actuator component configured as an actuator pin (76, 78) arranged to engage the internal teeth (74) of the release gear (48) when the at least one centrifugal weight (36, 38) is in the triggered position.

11. The fall arrestor as described in claim 10, characterized in that, The internal teeth (74) of the release gear (48) are configured to engage the actuator pins (76, 78) only when the rope (12) rises relative to the device (10) or the device (10) falls relative to the rope (12).

12. The fall arrestor as described in any one of claims 1-5, characterized in that, The release gear (48) includes an external tooth (72) that engages with the actuating rod (24) when the at least one centrifugal weight (36, 38) is in the trigger position, so as to rotate the actuating rod (24) to a position for actuating the blocking mechanism (23).

13. The fall arrestor as described in claim 9 or 11, characterized in that, Each of the centrifugal weights (36, 38) has a generally semi-cylindrical shape, which is pivotally supported at one end against the restoring force of the spring (40) about the axis of rotation (35, 37), the spring biasing the centrifugal weights (36, 38) toward each other.

14. The fall arrest device as described in any one of claims 1-5, characterized in that, The release gear (48) is engaged with the load-bearing disc (49) rotatably mounted on the drive shaft (32).

15. The fall arrestor as described in claim 6, characterized in that, The internal toothed portion (74) includes at least sixteen teeth.

16. The fall arrestor as described in claim 15, characterized in that, The internal toothed portion (74) comprises twenty-four teeth.

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