Anti-falling device

Abstract

The utility model relates to an anti-falling device which effectively solves the problems that a safety rope is large in impact force at the braking moment and poor in safety. According to the technical scheme, a hanging ring is arranged at the upper end of the shell, a rotating shaft in the left-right direction is arranged in the shell, a winding wheel is installed on the rotating shaft, a safety rope is wound around the winding wheel, a rope outlet hole is formed in the lower end of the shell, the lower end of the safety rope penetrates out of the rope outlet hole, and a first friction disc is coaxially installed at each end of the rotating shaft; the first friction discs are matched with the rotating shaft through splines, the inner wall of the left side and the inner wall of the right side of the shell are each fixedly provided with a mandrel, the outer ends of the first friction discs are arranged on the mandrels in a penetrating mode and matched with the mandrels through threads, the outer side of each first friction disc is provided with a second friction disc, and compression springs are arranged between the outer sides of the second friction discs and the inner wall of the shell. Under the action of the pressure spring, the second friction disc is in contact with the first friction disc; according to the utility model, the braking can be smoothly completed, the damage to equipment and workers is greatly reduced, and the braking is safe and reliable.

Description

Technical Field

[0001] The utility model relates to the field of high-altitude operations, in particular to an anti-falling device. Background Art

[0002] When working at height, workers use safety ropes to secure themselves to avoid falling accidents. Existing safety ropes will suddenly brake when workers fall, which has a great impact on equipment and workers at the moment of braking, making workers easily injured. If the fixing point is not firm enough, the impact force at the moment of braking may cause the safety rope to fall off.

[0003] The utility model patent with application number: CN202222542452.5 discloses a safety rope fixing device with a buffer mechanism, which buffers the braking impact by the deformation of the tension spring during braking by connecting a tension spring in series between the safety rope and the fixed point. Although this method can reduce the braking impact to a certain extent, there will still be obvious impact due to the generally limited deformation of the tension spring; and the series tension spring will become a weak point of the safety rope and is prone to breakage; furthermore, after braking, due to the retraction oscillation of the tension spring, the worker will swing up and down in the air, increasing the risk. Summary of the invention

[0004] The utility model provides an anti-falling device, aiming to solve the problems of large instantaneous impact force and poor safety of a safety rope during braking.

[0005] The technical solution includes a shell, a hanging ring is provided at the upper end of the shell, a rotating shaft in the left and right directions is provided in the shell, a winding wheel is installed on the rotating shaft, a safety rope is wound on the winding wheel, a rope outlet hole is provided at the lower end of the shell, the lower end of the safety rope passes through the rope outlet hole, a first friction disk is coaxially installed on each end of the rotating shaft, the first friction disk and the rotating shaft are splined, a core shaft coaxial with the rotating shaft is fixed on the left inner wall and the right inner wall of the shell, the outer end of the first friction disk is passed through the core shaft and is threadedly matched with the core shaft, a second friction disk is provided on the outer side of each first friction disk, a compression spring is provided between the outer side of the second friction disk and the inner wall of the shell, and under the action of the compression spring, the second friction disk contacts the first friction disk.

[0006] A plurality of left and right guide rods are fixed on the left inner wall and the right inner wall of the shell, and the second friction disk is provided with guide holes corresponding to the wire rods on the same side, and the guide rods are inserted into the guide holes on the second friction disk on the same side one by one.

[0007] The compression spring is sleeved on the guide rod.

[0008] Two rollers are arranged in the rope outlet hole, and the safety rope passes through between the two rollers, and the rollers guide and limit the safety rope.

[0009] The left inner wall and the right inner wall of the housing are both equipped with limiting wheels, and the limiting wheels abut against the end faces of the wire winding wheels on the same side.

[0010] The mating thread between the first friction disc and the mandrel is a non-self-locking thread.

[0011] The utility model can complete braking smoothly, greatly reducing the harm to the equipment and workers, and the braking is safe and reliable. Description of the Drawings

[0012] Figure 1 It is a front view sectional view of the initial state of the utility model.

[0013] Figure 2 It is a front view sectional view of the braking state of the utility model.

[0014] Figure 3 is Figure 1 an enlarged view of position A in Detailed Embodiment

[0015] Combined with the drawings, the utility model includes a housing 1. A hanging ring 2 is provided at the upper end of the housing 1. A left-right direction rotating shaft 3 is provided inside the housing 1. A wire winding wheel 4 is installed on the rotating shaft 3. A safety rope 5 is wound around the wire winding wheel 4. An out-rope hole 6 is provided at the lower end of the housing 1. The lower end of the safety rope 5 passes through the out-rope hole 6. A first friction disc 7 is coaxially installed at each end of the rotating shaft 3. The first friction disc 7 is in spline fit with the rotating shaft 3, so that the first friction disc 7 can rotate synchronously with the wire winding wheel 4 and can slide axially along the rotating shaft 3. A mandrel 8 coaxial with the rotating shaft 3 is fixed on each of the left inner wall and the right inner wall of the housing 1. The outer end of the first friction disc 7 is sleeved on the mandrel 8 and is in threaded fit with the mandrel 8. When the first friction disc 7 rotates with the wire winding wheel 4, under the action of the thread, it will move outward along the mandrel 8. A second friction disc 9 is provided outside each first friction disc 7. A compression spring 10 is provided between the outer side of the second friction disc 9 and the inner wall of the housing 1. Under the action of the compression spring 10, the second friction disc 9 is in contact with the first friction disc 7. The second friction disc 9 applies a braking force to the wire winding wheel 4 through the friction with the first friction disc 7. And as the outer movement distance of the first friction disc 7 is larger, the compression amount of the compression spring 10 is larger, the pressure between the two friction discs is larger, and the braking force is larger.

[0016] A plurality of left-right direction guide rods 11 are fixed on both the left inner wall and the right inner wall of the housing 1. Guide holes 12 corresponding to the same-side guide rods are opened on the second friction disc 9. The guide rods 11 are respectively inserted into the guide holes 12 on the second friction disc 9 on the same side, so as to guide the second friction disc 9, making the second friction disc 9 only slide left and right and not rotate with the first friction disc 7.

[0017] The compression spring 10 is sleeved on the guide rod 11.

[0018] There are two roller wheels 13 installed in the rope outlet hole 6. The safety rope 5 passes through between the two roller wheels 13. The roller wheels 13 guide and limit the safety rope 5 to prevent the safety rope 5 from rubbing against or jamming in the rope outlet hole 6.

[0019] Limit wheels 14 are installed on the inner walls of the left and right sides of the housing 1. The limit wheels 14 abut against the end faces of the wire winding wheels 4 on the same side to axially limit the wire winding wheels 4 and prevent the wire winding wheels 4 from slipping left and right.

[0020] The mating thread between the first friction disc 7 and the core shaft 8 is a non-self-locking thread. After dangerous contact, the first friction disc 7 can be reset inward under the action of the compression spring 10, and at the same time drive the wire winding wheel 4 to wind up the safety rope 5.

[0021] When the utility model is in use, the hanging ring 2 is hung on a safety fixture above the working position. A safety belt is equipped at the lower end of the safety rope 5. Workers wear the safety belt on their bodies for working at heights. When a worker falls, the safety rope 5 will be pulled out from the wire winding wheel 4, and at the same time drive the wire winding wheel 4 to rotate. The wire winding wheel 4 drives the first friction disc 7 to rotate through the spline of the rotating shaft 3. The frictional force between the first friction disc 7 and the second friction disc 9 applies damping to the rotation of the wire winding wheel 4. At the same time, the first friction disc 7 moves outward under the action of the threaded fit with the core shaft 8, pushing the second friction disc 9 to move outward, compressing the compression spring 10. The pressure between the first friction disc 7 and the second friction disc 9 gradually increases, and the frictional force also gradually increases, and the braking force on the wire winding wheel 4 also gradually increases, realizing smooth deceleration until the safety rope 5 on the wire winding wheel 4 is completely pulled out, the wire winding wheel 4 stops rotating, and the worker stops falling.

[0022] When a worker falls, the utility model will not cause an impact by suddenly braking, but the braking force gradually increases. The worker falls a certain distance and is smoothly braked during this process, which can greatly reduce the harm of sudden braking impact to the equipment and the worker. Moreover, the safety rope 5 is fixed on the wire winding wheel 4. After the safety rope 5 is completely pulled out, it can ensure complete braking without weak positions, which is safe and effective. In addition, the utility model will not continue to shake up and down after braking, which is safer.

Claims

1. An anti-fall device, comprising a housing (1), wherein the upper end of the housing (1) is provided with a hanging ring (2), characterized in that: A rotating shaft (3) extending in a left-right direction is provided in the housing (1). A winding wheel (4) is mounted on the rotating shaft (3). A safety rope (5) is wound around the winding wheel (4). A rope outlet hole (6) is provided at the lower end of the housing (1). The lower end of the safety rope (5) passes through the rope outlet hole (6). A first friction disc (7) is coaxially mounted on each end of the rotating shaft (3). The first friction disc (7) and the rotating shaft (3) are spline-matched. A core shaft (8) coaxial with the rotating shaft (3) is fixed on the left inner wall and the right inner wall of the housing (1). The outer end of the first friction disc (7) passes through the core shaft (8) and is thread-matched with the core shaft (8). A second friction disc (9) is provided on the outer side of each first friction disc (7). A compression spring (10) is provided between the outer side of the second friction disc (9) and the inner wall of the housing (1). Under the action of the compression spring (10), the second friction disc (9) contacts the first friction disc (7).

2. The anti-fall device according to claim 1, characterized in that: A plurality of left-right guide rods (11) are fixed to the left inner wall and the right inner wall of the housing (1), and guide holes (12) corresponding to the wire rods on the same side are opened on the second friction disc (9), and the guide rods (11) are inserted into the guide holes (12) on the second friction disc (9) on the same side one by one.

3. The anti-fall device according to claim 2, characterized in that: The compression spring (10) is sleeved on the guide rod (11).

4. The anti-fall device according to claim 1, characterized in that: Two rollers (13) are arranged in the rope outlet hole (6), and the safety rope (5) passes through between the two rollers (13). The rollers (13) guide and limit the safety rope (5).

5. The anti-fall device according to claim 1, characterized in that: The left inner wall and the right inner wall of the housing (1) are both provided with limit wheels (14), and the limit wheels (14) abut against the end surface of the winding wheel (4) on the same side.

6. The anti-fall device according to claim 1, characterized in that: The mating thread between the first friction disc (7) and the core shaft (8) is a non-self-locking thread.

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