Anti-pressing rope wheel retreats open rope grabber

Abstract

A kind of anti-pressing rope wheel retreats open's grab rope, one side of the bottom plate of a shell is equipped with a rope groove, and one side is connected with a shaft unit, one end of a swing arm is rotatably sleeved in shaft unit, a rope wheel is pivoted to the other end of swing arm, the shell is provided with the deflection elastic element of driving swing arm to swing towards rope groove, coaxially fixed a cogwheel in rope wheel, fixed a rack element with circular arc rack on the bottom plate, circular arc rack is concentric with the center line of shaft unit;The utility model discloses a cogwheel towards the side of shaft unit and circular arc rack meshing, so that a safety rope is arranged in the rope groove and is clamped by rope groove wall surface and rope wheel, even if shaking safety rope also can not make rope wheel retreat from the state of pressing safety rope by safety rope, can promote the safety protection capability of grab rope.

Description

Technical Field

[0001] This utility model relates to a safety device; in particular, it refers to a rope gripper that prevents the rope pulley from retracting. Background Technology

[0002] Existing rope grabbers are integrated with the user's safety harness. The rope grabber has a rope groove on one side of its outer casing and a rope-pressing pulley pivotally connected to the other side. When the rope grabber is used, the safety rope is placed into a rope groove, and the outer circumference of the rope-pressing pulley unidirectionally clamps the safety rope against the wall of the rope groove. This prevents the user from falling from a height by clamping the safety rope in the event of a fall.

[0003] While the existing rope grippers can be integrated with safety harnesses to provide users with safety protection against falls from heights, the safety rope, which is located within the rope groove and held between the groove wall and the pressure pulley, is continuously pulled upwards by external force. If the user panics and shakes the safety rope, the shaking motion may push the pressure pulley away from its position where it is pressed against the safety rope by the groove wall. This would prevent the rope gripper from holding the safety rope, resulting in the user still falling from a height. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a rope gripper, which has a structure inside the rope gripper to prevent the pressure wheel from retracting from the position of pressing the safety rope, thereby improving the safety protection capability of the rope gripper.

[0005] To achieve the above objectives, this utility model provides a rope gripper for preventing the rope pulley from retracting, comprising a housing and a braking device. The housing has a base plate, and a rope seat portion and an assembly portion are respectively formed on both sides of the base plate; a rope seat is connected to the rope seat portion, and a rope groove is formed on the side of the rope seat facing the assembly portion; a shaft unit is connected to the assembly portion. The braking device includes a swing arm, a rope pressing wheel, a biasing elastic element, a co-moving gear, and a rack element. One end of the swing arm is sleeved on the shaft unit and pivotally connected to the assembly part through the shaft unit. The other end of the swing arm is connected to a rotating shaft. The rope pressing wheel has a wheel axle hole in the center and is rotatably sleeved on the rotating shaft through the wheel axle hole. The biasing elastic element is disposed between the outer shell and the swing arm to apply an elastic force to the swing arm, causing it to swing in the direction of the rope groove. The co-moving gear is fixed to the rope pressing wheel. The rope pressing wheel and the co-moving gear rotate integrally and are both coaxially arranged with the center line of the rotating shaft. The rack element is connected to the assembly part and fixed relative to the outer shell. The rack element forms an arc-shaped rack. The arc-shaped rack is concentrically arranged with the center line of the shaft unit. The side of the co-moving gear facing the shaft unit meshes with the arc-shaped rack.

[0006] When in use, the outer shell of this utility model is connected to the safety belt worn by the user, and the safety rope, which is fixed in one place, is placed in the rope groove, so that the safety rope is clamped by the wall of the rope groove and the rope pressing wheel.

[0007] The advantage of this invention is that when a user falls from a height, causing the invention to descend and the safety rope to move upward relative to the rope groove of the outer casing, the frictional force of the upward-moving safety rope, through the meshing structure of the synchronous gear and the arc-shaped rack, drives the rope-pressing wheel to rotate together with the synchronous gear. This causes the synchronous gear to move along the arc-shaped rack, resulting in the rope-pressing wheel pressing down on the safety rope to brake it to a stop. Even if the user panics and shakes the outer casing and the safety rope, the safety rope remains continuously pulled upward relative to the invention, preventing the rope-pressing wheel from disengaging from its pressing position. This ensures the user is securely suspended on the safety rope, enhancing the safety protection capability of the invention. Attached Figure Description

[0008] Figure 1 This is a perspective view of a preferred embodiment of the present invention.

[0009] Figure 2 This is a schematic diagram of the opening of the cover plate in the preferred embodiment of the present invention.

[0010] Figure 3 for Figure 1 Top view.

[0011] Figure 4 for Figure 1 Front view of the front half of the cover plate, front swing arm, and wheel housing after disassembly.

[0012] Figure 5 This is an exploded view of the preferred embodiment of the present invention.

[0013] Figure 6 for Figure 5 An exploded view of the braking device.

[0014] Figure 7 for Figure 6 Exploded view of the pressure rope wheel.

[0015] Figure 8 for Figure 3 A cross-sectional view along the 8-8 direction.

[0016] Figure 9 for Figure 8 A diagram illustrating the action.

[0017] Figure 10 for Figure 3 A cross-sectional view along the 10-10 direction.

[0018] Figure 11 for Figure 10 A diagram illustrating the action.

[0019] Explanation of reference numerals in the attached figures

[0020] 100: Rope gripper with anti-pinch rope pulley retraction

[0021] 10: Outer shell

[0022] 11: Stop

[0023] 111: Shaft hole

[0024] 112: Inside

[0025] 113: Actuating section

[0026] 12: Base plate

[0027] 121: Rope base

[0028] 122: Assembly Department

[0029] 123: First base plate hole

[0030] 124: Second base plate hole

[0031] 125: Third base plate hole

[0032] 126: Fourth bottom plate hole

[0033] 13: Cover plate

[0034] 131: Pivot Hole

[0035] 132: Protruding button opening

[0036] 14: Rope seat

[0037] 141: Rope Groove

[0038] 142: Flexible Button

[0039] 15: Shaft

[0040] 16: Top Cover

[0041] 161: First perforation

[0042] 162: Second perforation

[0043] 163: First shot

[0044] 164: Second shot

[0045] 18: Shaft Unit

[0046] 181: Fixed shaft

[0047] 182: Bushing

[0048] 1821: Neck

[0049] 20: Braking device

[0050] 21: Wheel housing

[0051] 211: Open at the top

[0052] 212: Lateral opening

[0053] 22: Arm Swing

[0054] 221: Swing rod

[0055] 222: Pivot Hole

[0056] 2221: Snap-in groove

[0057] 223: Shaft hole

[0058] 224: Shaft

[0059] 24: Rope Pressing Wheel

[0060] 241: Foreign vessel

[0061] 2411: Shaft tube

[0062] 2412: Axle hole

[0063] 2413: External rostrum

[0064] 2414: Outer stop surface

[0065] 2415: Receptacle

[0066] 2416: Pivot surface

[0067] 2417: Pivot rod

[0068] 2418: Spring seat

[0069] 2419: Spring groove

[0070] 242: Brake disc

[0071] 2421: Annular recess

[0072] 2422: Bushing

[0073] 2423: Internal ratchet ring

[0074] 2424: Internal ratchet

[0075] 2425: Inner stop surface

[0076] 2426: Inner sliding surface

[0077] 243: Spiked Claw

[0078] 2431: Pivotal Section

[0079] 2432: Pivot hole

[0080] 2433: Spring Block

[0081] 2434: Ratchet

[0082] 2435: Curved surface

[0083] 244: Reset elastic element

[0084] 26: Prefers elastic elements

[0085] 28: Co-moving gears

[0086] 29: Rack and pinion element

[0087] 291: Substrate

[0088] 292: Fixing hole

[0089] 293: Extension rod

[0090] 294: Arc-shaped rack

[0091] 30: External Connector Components

[0092] 32: Side pole

[0093] 321: Sleeve

[0094] 34: Connecting rod

[0095] 36: Lever

[0096] A: Threading point

[0097] A1: Safety rope

[0098] S1: First rotation direction

[0099] S2: Second rotation direction

[0100] P1: Closed position

[0101] P2: Expand position Detailed Implementation

[0102] To more clearly illustrate this utility model, preferred embodiments are described in detail below with reference to the accompanying drawings. Please refer to... Figure 1 and Figure 2The image shows a preferred embodiment of the anti-pinch rope pulley retraction gripper 100 of this utility model. In the following description involving directions, the description will refer to the relative positions of the anti-pinch rope pulley retraction gripper 100 during use: up / down, front / back, left / right, and inside / outside. The anti-pinch rope pulley retraction gripper 100 includes a housing 10, a braking device 20, and an external connecting element 30, wherein:

[0103] Please refer to Figures 1 to 5 As shown, the outer casing 10 has a base plate 12, a rope seat 14, a top cover 16, a shaft unit 18, a stop block 11, and a cover plate 13. The base plate 12 is a plate body with a rope seat portion 121 and an assembly portion 122 formed on its left and right sides, respectively. A first base plate hole 123, a second base plate hole 124, a third base plate hole 125, and a fourth base plate hole 126 are formed from left to right on the portion of the assembly portion 122 adjacent to its upper edge. The rope seat 14 is a block extending in the vertical direction and connected to the rope seat portion 121. A rope groove 141 is formed on the side of the rope seat 14 facing the assembly portion 122. The rope groove 141 is a U-shaped groove extending in the vertical direction. An elastic protrusion 142 is provided in the middle of the rope seat 14, and the elastic protrusion 142 protrudes from the surface of the rope seat 14 away from the base plate 12.

[0104] The top cover 16 is a block extending in the left-right direction and has a first through hole 161 and a second through hole 162. A first rod 163 is inserted through and fixed to the first through hole 161 and the first bottom plate hole 123, and a second rod 164 is inserted through and fixed to the second through hole 162 and the second bottom plate hole 124. The two ends of the second rod 164 protrude from the second through hole 162 and the second bottom plate hole 124, respectively, thereby connecting the top cover 16 to the upper edge of the assembly part 122, and the outer edge of the top cover 16 is aligned with the edge of the assembly part 122. The top cover 16 and the upper end of the rope groove 141 are spaced apart, and a rope threading opening A is formed between the top cover 16 and the upper end of the rope groove 141.

[0105] The shaft unit 18 includes a fixed shaft 181 and a bushing 182. One end of the fixed shaft 181 is fixed to the third bottom plate hole 125, connecting the fixed shaft 181 to the assembly part 122. The bushing 182 is sleeved on the fixed shaft 181, and a neck 1821 with a smaller outer diameter is formed at the front end of the bushing 182. A shaft 15 is provided in conjunction with the stop block 11. One end of the shaft 15 is fixed to the fourth bottom plate hole 126. The stop block 11 has a shaft hole 111 in the middle, through which the shaft hole 111 is rotatably sleeved on the shaft 15. The inner side of the stop block 11 has an inner surface 112, and the outer side of the stop block 11 forms a toggle part 113. The right side of the toggle part 113 protrudes from the right edge of the assembly part 122, and the upper side of the toggle part 113 abuts against the right end of the top cover 16.

[0106] The cover plate 13 is a plate with a shape roughly the same as the base plate 12. The cover plate 13 and the base plate 12 are opposite each other, and the cover plate 13 covers the rope seat 14 and the top cover 16. The cover plate 13 forms a pivot hole 131 with the other end of the fixed shaft 181, so that the cover plate 13 can be rotatably fitted onto the other end of the fixed shaft 181, allowing the cover plate 13 to rotate relative to the fixed shaft 181. The elastic button 142 forms a button opening 132 on the cover plate 13, and the button opening 132 is fitted onto the elastic button 142. When the user needs to open the cover plate 13, pressing the elastic button 142 will release the cover plate 13, and then the user can rotate the cover plate 13 to move it away from the position covering the rope seat 14. After the user opens the cover plate 13, a safety rope A1 can be placed into the rope groove 141 and the safety rope A1 can be passed through the rope opening A in the vertical direction. After the safety rope A1 is placed in the rope groove 141, the cover plate 13 can be rotated back to its original position. At this time, the cover plate 13 will cover the safety rope A1 from the front.

[0107] Please refer to Figures 3 to 7As shown, the braking device 20 includes a swing arm 22, a rope pressing wheel 24, a biasing elastic element 26, a co-moving gear 28, and a rack element 29. The swing arm 22 includes a pair of opposing swing rods 221. A pair of pivot holes 222 are formed at one end of the pair of swing rods 221, which are rotatably fitted onto the bushing 182. The pair of swing rods 221 are located inside the stop block 11 and are stopped by the stop block 11. A pair of rotating shaft holes 223 are formed at the other end of the pair of swing rods 221, and the two ends of a rotating shaft 224 are fixed to the pair of rotating shaft holes 223. When facing the front side of the rope pressing wheel 24, the counterclockwise rotation direction of the swing arm 22 towards the rope groove 141 is defined as a first rotation direction S1, and the clockwise direction is defined as a second rotation direction S2. When the swing arm 22 swings in the second rotation direction S2, it will be stopped by the stop block 11. Therefore, the swing amplitude of the swing arm 22 in the second rotation direction S2 is limited by the stop block 11.

[0108] One of the pair of swing rods 221 forms a retaining groove 2221 around the pivot hole 222. In this preferred embodiment, the retaining groove 2221 is formed around the pivot hole 222 of the rear swing rod 221. A wheel housing 21 is connected between the pair of swing rods 221. The wheel housing 21 is formed by joining two halves of the housing together, and each half of the housing is connected to each swing rod 221. The wheel housing 21 is arranged around the rotating shaft 224. An upper opening 211 is formed on the upper side of the wheel housing 21, and a lateral opening 212 is formed on the side of the wheel housing 21 facing the rope groove 141.

[0109] The rope pressing wheel 24 includes an outer wheel 241, a brake disc 242, two pawls 243, and two reset elastic elements 244. The outer wheel 241 is a disc-shaped wheel body with a central axle tube 2411. A wheel axle hole 2412 is formed inside the axle tube 2411. The axle tube 2411 and its wheel axle hole 2412 are rotatably fitted onto the rotating shaft 224. The outer wheel 241 is housed in the wheel housing 21, and the side of the outer wheel 241 facing the rope groove 141 is exposed outward from the lateral opening 212. The outer circumferential surface of the outer wheel 241 forms a plurality of external ratchet teeth 2413, which are arranged around the rotating shaft 224. Each external ratchet tooth 2413 has an external stop surface 2414, which faces the second rotation direction S2. The plurality of external ratchet teeth 2413 of the outer wheel 241 cooperate with the inner wall of the rope groove 141 to clamp the safety rope A1. A receiving groove 2415 with a forward opening is formed inside the outer wheel 241. The receiving groove 2415 is an annular groove and surrounds the shaft tube 2411. A pivot surface 2416 is formed on the bottom side of the receiving groove 2415. A pivot rod 2417 is connected to each of the opposite sides of the pivot surface 2416. Each pivot rod 2417 is located in a centrifugal position on the pivot surface 2416. A spring seat 2418 is connected to the portion of the pivot surface 2416 next to each pivot rod 2417. Each spring seat 2418 forms a spring groove 2419.

[0110] The brake disc 242 is a circular ring and is sleeved on the rotating shaft 224. The brake disc 242 is disposed in the receiving groove 2415. An annular recess 2421 is formed on the inner circumferential surface of the brake disc 242. The annular recess 2421 is sleeved on the shaft tube 2411 and does not restrict the relative rotation of the two, thereby improving the coaxial positioning of the brake disc 242 relative to the outer wheel 241. A bushing 2422 is provided between the annular recess 2421 and the shaft tube 2411 to reduce wear between the two. The brake disc 242 has an inner ratchet ring 2423, the inner circumferential surface of which forms two pairs of inner ratchet teeth 2424, each pair of inner ratchet teeth 2424 being arranged opposite to each other, and the plurality of inner ratchet teeth 2424 being arranged continuously around the rotating shaft 224, each inner ratchet tooth 2424 having an adjacent inner stop surface 2425 and an inner sliding surface 2426, and each inner stop surface 2425 facing the second rotation direction S2.

[0111] Please refer to Figures 7 to 9As shown, the two pawls 243 are used to engage or release each pair of inner ratchet teeth 2424. Each pawl 243 has a pivot portion 2431 at one end, and each pivot portion 2431 has a pivot hole 2432. Each pivot hole 2432 is rotatably fitted onto each pivot rod 2417, and each pivot hole 2432 is pivotally connected to the centrifugal position of the pivot surface 2416, so that each pawl 243 can rotate between a closed position P1 and an extended position P2, and each pawl 243 is located inside the inner ratchet ring 2423. Each of the pivot portions 2431 is connected to a spring block 2433 on one side corresponding to each of the spring seats 2418, and a ratchet block 2434 is connected to the other side of each pivot portion 2431 away from each of the spring blocks 2433. The outer sides of each spring block 2433 and each pivot portion 2431 together form an arc-shaped surface 2435. Each of the reset elastic elements 244 is a compression spring and is disposed in each of the spring grooves 2419. One end of each reset elastic element 244 abuts against the inner end of each of the spring grooves 2419, and the other end abuts against each of the spring blocks 2433. Thus, the reset elastic element 244 is disposed between the outer wheel 241 and each of the pawls 243 to apply a spring force to each of the pawls 243 to maintain them in the closed position P1, so that each of the pawls 243 can remain in the closed position P1 in its natural state.

[0112] Please refer to Figures 4 to 6 As shown, the biasing elastic element 26 is a torsion spring and is sleeved on the bushing 182. One end of the biasing elastic element 26 is hooked on the buckle groove 2221, and the other end abuts against the inner surface 112 of the stop block 11. Thus, the biasing elastic element 26 is disposed between the outer shell 10 and the swing arm 22 to apply an elastic force to the swing arm 22 to make it swing in the direction of the rope groove 141.

[0113] Please refer to Figures 4 to 6As shown, the co-moving gear 28 is fixed to the front side of the brake disc 242 and coaxially arranged with the center line of the rotating shaft 224. The co-moving gear 28 is sleeved on the rotating shaft 224. The rack element 29 is located between the pair of swing rods 221 and has a base plate 291. The base plate 291 has two fixing holes 292. One fixing hole 292 is sleeved on the neck 1821 of the bushing 182, and the other fixing hole 292 is sleeved on the other end of the shaft 15, thereby fixing the rack element 29 relative to the housing 10 to the assembly part 122. An extension rod 293 extends from the base plate 291 toward the co-moving gear 28. The extension rod 293 passes through the upper opening 211 of the wheel housing 21 and extends into the wheel housing 21. An arc-shaped rack 294 is formed at the outer end of the extension rod 293. The arc-shaped rack 294 is concentrically arranged with the center line of the shaft unit 18. The co-moving gear 28 meshes with the arc-shaped rack 294 on the side facing the shaft unit 18.

[0114] Please refer to Figure 2 As shown, when the swing arm 22 and the rope pressing wheel 24 swing in the first rotation direction S1 or the second rotation direction S2, the co-moving gear 28 swings and rotates along the arc-shaped rack 294, causing the brake disc 242 of the rope pressing wheel 24 to rotate as a unit with the co-moving gear 28. Since the angle of the rope pressing wheel 24's forward and backward swing relative to the shaft unit 18 towards the rope groove 141 is limited, the angle of rotation of the brake disc 242 relative to the rotating shaft 224 is also limited. The limited swing stroke of the rope pressing wheel 24 relative to the shaft unit 18 towards the rope groove 141 restricts the co-moving gear 28 and the brake disc 242 to rotate relative to the rotating shaft 224 within a limited angular range.

[0115] Please refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the external connecting element 30 includes a pair of side rods 32, the inner ends of which form a pair of sleeve holes 321. The pair of sleeve holes 321 are rotatably fitted onto the two ends of the second rod 164. A connecting rod 34 is connected between the outer ends of the pair of side rods 32. The connecting rod 34 is used to connect the seat belt cushioning bag on the user's seat belt. A lever 36 is also connected between the pair of side rods 32, and the actuating part 113 of the stop block 11 is located on the rotation path of the lever 36.

[0116] Please refer to Figure 1 and Figure 4As shown, when the anti-pressure rope pulley retracts and the rope gripper 100 is fitted onto the safety rope A1, and the external connecting element 30 is connected to the safety buffer bag on the user's safety belt, if the user suddenly falls downwards, the user's safety belt will pull down the external connecting element 30 along with the safety buffer bag, causing the external connecting element 30 to rotate relative to the shaft unit 18 in the first rotation direction S1. Since the actuating part 113 is located on the rotation path of the lever 36, when the lever 36 moves downward past the actuating part 113, it will push the actuating part 113 to make the stop block 11 rotate in the first rotation direction S1. At this time, the inner surface 112 of the stop block 11 will push the swing arm 22 to swing in the direction of the rope groove 141, driving the rope pressing wheel 24 to clamp the safety rope A1 in the direction of the rope groove 141. This is an auxiliary safety measure to ensure that the rope pressing wheel 24 will clamp the safety rope A1 in the direction of the rope groove 141 when the user falls.

[0117] When using the above-described preferred embodiments of this utility model, please refer to... Figure 2 , Figure 4 , Figure 8 and Figure 9 As shown, a connecting rod 34 connects to the safety belt cushioning pouch on the user's safety belt, and a safety rope A1, fixed in one place, is placed into the rope groove 141, so that the safety rope A1 is clamped by the inner wall of the rope groove 141 and the multiple external ratchet teeth 2413 of the outer wheel 241. When the user pulls the anti-pressure rope pulley retracted rope gripper 100 to rise or fall through the external connecting element 30, since the outer wheel 241 of the pressure wheel 24 and the brake disc 242 are in a released state and can rotate relative to each other, the safety rope A1 can freely pass through the rope groove 141 and the pressure wheel 24 in the vertical direction, without hindering the anti-pressure rope pulley retracted rope gripper 100 from moving up and down with the user.

[0118] If a user falls from a height, the user pulls the anti-pressure rope pulley 100 to descend quickly via the external connecting element 30. The safety rope A1 moves rapidly upward relative to the rope groove 141, and the friction of the safety rope A1 causes the outer wheel 241 to rotate rapidly in the first rotation direction S1. At this time, the pawls 243 rotate at a speed exceeding a predetermined speed along with the outer wheel 241, and the centrifugal force on each pawl 243 exceeds the elastic force of each reset elastic element 244, causing each pawl 243 to rotate to the unfolded position P2. At this time, the ratchet blocks 2434 of each pawl 243 engage with each inner ratchet 2424 along the first rotation direction S1, locking the outer wheel 241 and the brake disc 242. In this way, the pressure rope pulley 24 becomes a whole and rotates together with the co-moving gear 28.

[0119] Please refer to Figures 9 to 11 As shown, when the outer wheel 241 and the brake disc 242 are locked, and the safety rope A1 continues to move upward relative to the rope groove 141, the friction of the safety rope A1 will cause the locked brake disc 242 and the co-moving gear 28 to continue rotating together in the first rotation direction S1. Simultaneously, the co-moving gear 28 will swing and rotate along the arc-shaped rack 294, causing the locked rope-pressing wheel 24 to press against the safety rope A1 in the direction of the rope groove 141, producing a braking effect until the rope gripper 100, which prevents the rope-pressing wheel from retracting, stops relative to the safety rope A1. Thus, even if the user of this invention accidentally shakes the safety rope A1 in a panic, the locked rope-pressing wheel 24 will not retract from the direction pressing against the safety rope A1. In other preferred embodiments, the rope pressing wheel can be replaced with a single wheel body with multiple external ratchet teeth on its outer circumferential surface and rotatably fitted onto the rotating shaft 224 through a central axle hole. The coaxial gear 28 is then coaxially coupled to this rope pressing wheel. In this way, the rope pressing wheel can also benefit from the design of the coaxial gear 28 meshing with the arc-shaped rack 294, preventing the rope pressing wheel from retracting from the direction of pressing the safety rope A1 while it is pressing the safety rope A1.

[0120] In another preferred embodiment, the co-moving gear 28 and the rack element 29 may be omitted, and the brake disc 242 may be fixed relative to the rotating shaft 224. Thus, when a user falls from a height, the user pulls the anti-pressure rope pulley 100 to descend quickly via the external connecting element 30, causing the safety rope A1 to move rapidly upward relative to the rope groove 141. The friction of the safety rope A1 will cause the outer wheel 241 to rotate rapidly in the first rotation direction S1. When the outer wheel 241 and the brake disc 242 are locked, the pressure rope pulley 24 cannot rotate relative to the swing arm 22 (because the brake disc 242 is fixed relative to the rotating shaft 224 and cannot rotate). At this time, the safety rope A1, which continues to move upward relative to the rope groove 141, will use friction to drive the rope pressing wheel 24 to press the safety rope A1 in the direction of the rope groove 141. Thus, by tightly clamping the safety rope A1 between the rope pressing wheel 24 and the inner wall of the rope groove 141, a braking effect is generated until the rope gripper 100, which is retracted from the anti-pressure rope wheel, stops relative to the safety rope A1.

[0121] In addition to the preferred embodiment described above, in which the pawl 243 and the reset elastic element 244 are each provided in pairs, this utility model may also provide one or more pawls 243 and the reset elastic element 244. When the pawls 243 are provided in multiples, they are preferably arranged at equal intervals around the rotating shaft 224. Furthermore, the inner ratchet teeth 2424 may be provided in pairs, or in pairs, or even with only one inner ratchet tooth 2424 formed on the inner circumferential surface of the inner ratchet ring 2423, all of which can still provide the function of engaging the pawls 243 in the unfolded position P2.

[0122] 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 rope gripper that prevents the rope pulley from retracting, characterized in that, include: An outer casing having a base plate, with a rope seat portion and an assembly portion formed on each side of the base plate; a rope seat is connected to the rope seat portion, a rope groove is formed on the side of the rope seat facing the assembly portion, and a shaft unit is connected to the assembly portion; and A braking device includes a swing arm, a rope pressing wheel, a biasing elastic element, a co-moving gear, and a rack element. One end of the swing arm is sleeved on the shaft unit and pivotally connected to the assembly part through the shaft unit. The other end of the swing arm is connected to a rotating shaft. The rope pressing wheel has a wheel axle hole in its center and is rotatably sleeved on the rotating shaft through the wheel axle hole. The biasing elastic element is disposed between the housing and the swing arm to apply an elastic force to the swing arm, causing it to swing in the direction of the rope groove. The co-moving gear is fixed to the rope pressing wheel, and the rope pressing wheel and the co-moving gear rotate integrally and are both coaxially arranged with the center line of the rotating shaft. The rack element is connected to the assembly part and fixed relative to the housing. The rack element forms an arc-shaped rack, and the arc-shaped rack is concentrically arranged with the center line of the shaft unit. The side of the co-moving gear facing the shaft unit meshes with the arc-shaped rack.

2. The rope gripper with anti-pinch rope pulley retraction as described in claim 1, wherein, The swing arm includes a pair of swing rods, one end of which forms a pair of pivot holes, which are rotatably fitted onto the shaft unit; the other end of which forms a pair of rotating shaft holes, and both ends of the rotating shaft are fixed to the pair of rotating shaft holes.

3. The rope gripper with anti-pinch rope pulley retraction as described in claim 2, wherein, The shaft unit includes a fixed shaft and a bushing. One end of the fixed shaft is connected to the assembly part, and the bushing is sleeved on the fixed shaft. The pair of pivot holes are rotatably sleeved on the bushing.

4. The rope gripper with anti-pinch rope pulley retraction as described in claim 3, wherein, One of the pair of swing rods forms a groove around the pivot hole; a stop block is connected to the assembly part, the stop block being located outside the pair of swing rods; the deflecting elastic element is a torsion spring and is sleeved on the bushing, one end of the deflecting elastic element is hooked into the groove, and the other end abuts against the inner side of the stop block.

5. The rope gripper with anti-pinch rope pulley retraction as described in claim 4, wherein, A shaft is connected to the assembly part, and the shaft is located outside the pair of swing arms; the rack element is located between the pair of swing arms and has a base plate, the base plate has two fixing holes, the two fixing holes are respectively fitted onto the bushing and the shaft, and an extension rod extends from the base plate toward the co-moving gear, and the arc-shaped rack is formed at the outer end of the extension rod.

6. The rope gripper with anti-pinch rope pulley retraction as described in claim 5, wherein, The rope groove extends in the vertical direction; an external connecting element is pivotally connected to the upper edge of the assembly part, and a connecting rod is provided at the outer end of the external connecting element.

7. The rope gripper with anti-pinch rope pulley retraction as described in claim 6, wherein, The stop block has a shaft hole, through which it is rotatably fitted onto the shaft. The inner side of the stop block has an inner surface, and the other end of the biased elastic element abuts against the inner surface. An actuating portion is formed on the outer side of the stop block, and the actuating portion protrudes from the edge of the assembly portion. The external connecting element includes a pair of side rods, the inner ends of which are pivotally connected to the portion of the assembly portion adjacent to the upper edge. A connecting rod is connected between the outer ends of the pair of side rods, and a lever is connected between the pair of side rods. When the external connecting element rotates in the same direction as the swing arm swinging towards the rope groove, the actuating portion is located on the rotation path of the lever, thereby allowing the lever to actuate the actuating portion to rotate and push the swing arm to swing towards the rope groove with the inner surface.

Images