CN215351654U

CN215351654U - Falling protector

Info

Publication number: CN215351654U
Application number: CN202120031642.3U
Authority: CN
Inventors: 洪暐杰; 廖文铭
Original assignee: Yoke Industrial Corp
Current assignee: Yoke Industrial Corp
Priority date: 2021-01-07
Filing date: 2021-01-07
Publication date: 2021-12-31
Anticipated expiration: 2031-01-07

Abstract

A falling protector comprises a bracket, a turntable and a braking device; the turntable is pivoted on the bracket; the rotary disc comprises a body and a normally open ratchet; each normally open ratchet is provided with a first abutting part, a pivot and a gravity center part and is pivoted on the setting part of the body; the braking device is provided with a second abutting part, and when the turntable rotates at a rotating speed which is greater than or equal to a preset rotating speed, the first abutting part abuts against the second abutting part to stop the rotation of the turntable; when the rotary disc rotates at a speed less than a preset rotating speed, the gravity center part of each normally open ratchet is contacted with the outer edge of the second abutting part and swings along with the change of the outer diameter of the second abutting part. Therefore, the normally open ratchet can avoid the influence of dust to ensure the use safety.

Description

Falling protector

Technical Field

The utility model relates to a fall arrester; in particular to a fall arrester with a double locking system.

Background

Because the building floor of the building is built higher at present, no matter the building staff during construction or the staff for cleaning and painting the outer wall after construction, the working danger of the building staff increases along with the height of the working position, therefore, during high-altitude work, the staff is often equipped with a safety catch comprising a safety belt, the safety catch is fixedly connected on a support, and the safety belt is tied on the body of the staff to prevent the staff from continuously falling, thereby ensuring the safety of the staff.

The traditional safety catch comprises a rotating part, a safety belt and a braking device, wherein one end of the safety belt is connected with the rotating part and wound on the rotating part; the braking device comprises a braking disc, a braking block and a stopping piece, wherein the braking disc is connected to the rotating piece and rotates coaxially with the rotating piece, the braking block is pivoted on the braking disc, and the braking block is thrown out under the action of centrifugal force generated when the braking disc rotates instantly and is clamped with the stopping piece so as to limit the rotation of the rotating piece. When the person falls carelessly during the hanging operation, the braking device can exert the function of emergency locking to stop the rotation of the rotating part, so as to prevent the continuous falling of the worker.

However, most conventional safety guards only have one set of brake pads, and when the single brake pad rotates to different positions (such as the highest point or the lowest point), the centrifugal force thrown out by the brake pad is offset by gravity or spring tension, so that the single brake pad cannot be actually engaged with the stop member, but continues to rotate, and the personnel continues to fall, causing injury to life.

In addition, the place using the safety catch is often in a state of dust diffusion, and the dust is easily attached to the braking device, especially to the pivot joint of the brake block, so that the brake block cannot be thrown out in an emergency, and the emergency locking function fails.

In order to reduce the influence of dust on the safety catch, the safety catch with a shell can be seen between the workshops so as to isolate the dust from the shell. However, the isolation effect of the housing is still very limited, and the dust in the environment may still adhere to the safety belt exposed outside the housing, enter the housing along with the retraction of the safety belt, and adhere to the pivot of the brake pad, so that the brake pad cannot pivot.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a safety hook, wherein a user can pull a safety belt in advance to know that a normally open ratchet is not locked by vibration generated when the normally open ratchet swings, so as to confirm normal operation of the safety hook. The falling protector provided by the utility model comprises a plurality of normally open ratchets, and when the normally open ratchets rotate to different positions (such as the highest point or the lowest point), each normally open ratchet can be respectively matched with external elasticity or gravity generated by the contact of the normally open ratchets and a braking device to generate a synergistic effect (namely the acting force direction is the same) on the centrifugal force thrown out by the braking block, so that each normally open ratchet can be really clamped with the braking device to stop the rotation of a turntable, the falling of personnel is stopped or the falling speed is slowed down, and the life safety of the personnel is guaranteed.

The safety catch comprises a bracket, a rotating disc and a braking device; the bracket is provided with a first supporting arm and a second supporting arm; the turntable is pivoted on the bracket and is positioned between the first support arm and the second support arm; the rotary table comprises a body and a plurality of normally open ratchets, wherein the body is provided with a containing part and a setting part, and the containing part is used for winding a flexible strip body thereon; each normally open ratchet is provided with a first abutting part and a pivot, the normally open ratchets are pivoted on the setting part through the pivot, and when the rotary disc rotates at a preset rotating speed or more, the pivoting swing of the first abutting part moving from a first position to a second position is generated; the braking device is provided with a convex part, and the braking device is fixedly combined on the first support arm through the convex part, so that the braking device is positioned between the first support arm and the setting part of the turntable; the braking device is also provided with a plurality of second abutting parts which are arranged on a rotating path formed along with the rotation of the turntable when the first abutting parts are positioned at the second positions and can abut against the first abutting parts so as to stop the rotation of the turntable; each normally open ratchet further comprises a gravity center part, and the gravity center part and the first abutting part of each normally open ratchet are located on different sides of the pivot; when the dial rotates at less than the predetermined rotation speed, the center of gravity portion of each normally open ratchet comes into contact with an outer edge of a part of the plurality of second abutting portions and swings as an outer diameter of a part of the plurality of second abutting portions changes.

The utility model has the advantages that a user can pull the safety belt of the safety catch in advance, and the normally open ratchet can be known to be not blocked by the vibration generated when the normally open ratchet swings, so as to confirm the normal action of the safety catch. The falling protector provided by the utility model comprises a plurality of normally open ratchets, and when the normally open ratchets rotate to different positions (such as the highest point or the lowest point), each normally open ratchet can be respectively matched with external elasticity or gravity generated by the contact of the normally open ratchets and a braking device to generate a synergistic effect (namely the acting force direction is the same) on the centrifugal force thrown out by the braking block, so that each normally open ratchet can be really clamped with the braking device to stop the rotation of a turntable, the falling of personnel is stopped or the falling speed is slowed down, and the life safety of the personnel is guaranteed.

Drawings

FIG. 1 is a perspective view of a safety brake device according to a preferred embodiment of the present invention.

Fig. 2 is a partially exploded view of fig. 1.

FIG. 3 is a front view of the fall arrester with the first arm of the bracket removed in accordance with a preferred embodiment of the present invention.

FIG. 4 is a close-up view of the upper normally open ratchet of the fall arrestor body of FIG. 3 with the center of gravity of the upper normally open ratchet contacting the outer edge of the brake.

FIG. 5 is a close-up view of the upper normally open ratchet of the fall arrestor body of FIG. 4 with the stopper rotated and the center of gravity of the upper normally open ratchet continuously contacting the outer edge of the stopper.

FIG. 6 is a close-up view of the upper normally open ratchet of the fall arrestor body of FIG. 5 with the stopper rotated and the center of gravity of the upper normally open ratchet continuously contacting the outer edge of the stopper.

FIG. 7 is a close-up view of the lower normally open ratchet of the fall arrestor body of FIG. 3 with the center of gravity of the lower normally open ratchet contacting the outer edge of the brake.

FIG. 8 is a close-up view of the upper normally open ratchet of the fall arrestor body of FIG. 4 with the brake rotated and the center of gravity of the lower normally open ratchet continuously contacting the outer edge of the brake.

FIG. 9 is a close-up view of the upper normally open ratchet of the fall arrestor body of FIG. 5 with the brake rotated and the center of gravity of the lower normally open ratchet continuously contacting the outer edge of the brake.

Description of the reference numerals

[ invention ]

1: falling protector

10: support frame

12: first support arm

14: second support arm

20: rotary disc

21: body

212: setting part

214: receiving part

22: normally open ratchet

22 a: first normally open ratchet

22 b: second normally open ratchet

221: pivot shaft

222: first contact part

224: center of gravity portion

225: roller wheel

226: elastic piece

30: brake device

302: second abutting part

31: convex part

G: center of gravity

Detailed Description

In order to more clearly illustrate the present invention, preferred embodiments are described in detail below with reference to the accompanying drawings. Referring to fig. 1 to 3, fig. 1 is a perspective view of a safety catch 1 according to a preferred embodiment of the present invention; FIG. 2 is a partially exploded view of FIG. 1; fig. 3 is a front view of the fall arrester 1 according to a preferred embodiment of the utility model, with the first leg 12 of the support 10 removed. In fig. 1 to 3, the safety brake device 1 comprises a support 10, a rotor 20 and a braking device 30.

The stand 10 has a first arm 12 and a second arm 14. The turntable 20 is pivotally mounted on the support 10 and located between the first support arm 12 and the second support arm 14.

The turntable 20 includes a main body 21 and a plurality of normally open ratchet teeth 22, wherein the main body 21 has a setting portion 212 and a holding portion 214. The receiving portion 214 is used for a flexible strip body (not shown) to be wound thereon. Each normally open ratchet 22 has a first abutting portion 222 and a pivot 221, and the normally open ratchets 22 are pivoted on the setting portion 212 through the pivot 221, so that when the rotary disc 20 rotates at a predetermined speed or more, the first abutting portion 222 swings from a first position to a second position. It should be noted that when the dial 20 rotates at a speed less than the predetermined speed, the first abutting portions 222 of the normally open ratchet teeth 22 do not maintain the abutting relationship with the second abutting portions 302 of the braking device 30, and the normally open ratchet teeth 22 are normally open.

The braking device 30 has a protrusion 31, and the braking device 30 is fixedly coupled to the first arm 12 by the protrusion 31, such that the braking device 30 is located between the first arm 12 and the setting portion 212 of the turntable 20. The brake device 30 further includes a plurality of second abutting portions 302, and the plurality of second abutting portions 302 are provided on a rotation path formed along with the rotation of the turntable 20 when the first abutting portion 222 is located at the second position, and are capable of abutting against the first abutting portions to stop the rotation of the turntable.

In fig. 3, the first and second normally

open ratchet teeth

22a and 22b further have a center of gravity portion 224, and the center of gravity portion 224 of the first and second normally

open ratchet teeth

22a and 22b is located on the opposite side of the pivot shaft 221 from the first abutting portion 222. In the present embodiment, in a natural state without the abutment of the second abutment 302, the first normally open ratchet 22a and the second normally open ratchet 22b are inclined from the first abutment 222 toward the center of gravity portion 224.

When the dial 20 is rotated at less than the predetermined rotation speed, the center of gravity portions 224 of the first and second normally

open ratchet teeth

22a and 22b are in contact with the outer edges of a part of the plurality of second abutment portions 302, respectively, and oscillate as the outer diameters of the plurality of second abutment portions 302 change.

In a preferred embodiment of the present invention, the number of the normally open ratchet teeth 22 is two, and includes a first normally open ratchet tooth 22a, a second normally open ratchet tooth 22 b; the first normally open ratchet 22a and the second normally open ratchet 22b are disposed on the surface of the setting portion 212, and are symmetrically disposed on opposite sides of the center of the rotation disk 20. In practice, the number of the normally open ratchets 22 may be two or more, and the normally open ratchets may be arranged in a balanced manner with respect to the center of the rotary table 20, for example, the normally open ratchets may be arranged in a regular polygon manner with the center of the rotary table 20 as the center of gravity.

In a preferred embodiment of the present invention, the bodies of the first normally open ratchet 22a and the second normally open ratchet 22b include the gravity center portion 224 and the first abutting portion 222, and the first normally open ratchet 22a and the second normally open ratchet 22b include an elastic member 226, one end of the elastic member 226 is fixed to the bodies of the first normally open ratchet 22a and the second normally open ratchet 22b, and the other end thereof is fixed to the setting portion 212 of the rotary disc 20. In an embodiment of the present invention, one end of the elastic element 226 is fixed to the weight portion 224 of the body of the first normally open ratchet 22a and the second normally open ratchet 22b, and the other end is fixed to the setting portion 212 of the rotary disc 20, so that the weight portion 224 is located between the pivot 221 and the elastic element 226. When the dial 20 rotates at less than the predetermined rotation speed, the gravity center portions 224 of the first and second normally

open ratchet teeth

22a and 22b are brought into contact with the outer edges of a part of the second contact portions 302 by the elastic members 226, and are swung within a certain range according to the change in the outer diameter of the second contact portions 302.

Furthermore, when the first and second normally

open ratchet teeth

22a and 22b swing along with the change of the outer diameter of a part of the plurality of second abutting portions 302, the elastic member 226 provides the restoring force for the swing of the first and second normally

open ratchet teeth

22a and 22b, and prevents the gravity center portion 224 of the first and second normally

open ratchet teeth

22a and 22b from repeatedly and directly hitting the outer edge of the second abutting portion 302 of the braking device 30, which may cause the structural damage of the safety hook 1. It should be noted that the elastic element 226 provides an upward pulling force to the gravity center portion 224 of the second normally open ratchet 22b located below, so as to avoid the gravity center portion 224 of the second normally open ratchet 22b located below from directly dropping, so that when the rotary disc 20 rotates at a speed less than the predetermined rotation speed, the first abutting portion 222 of the second normally open ratchet 22b located below abuts against the second abutting portion 302 of the braking device 30, and thus the fall arrester 1 is abnormally braked.

Referring to fig. 3 to 9 together, in the longitudinal direction of the fall arrester 1, when the dial 20 rotates, the first normally open ratchet 22a of the normally open ratchet teeth 22 is located above the second normally open ratchet 22b, wherein the center of gravity portion 224 of the first normally open ratchet 22a located above is kept in contact with the outer edge of a part of the second abutment portions 302 and swings as the outer diameter of a part of the second abutment portions 302 changes. In fig. 4 to 9, the center of gravity G of the first and second normally

open ratchet teeth

22a and 22b is located at the center of gravity portion 224, and therefore, in a natural state, the center of gravity portion 224 of the first normally open ratchet tooth 22a located above is held in contact with the outer edge of a part of the plurality of second abutment portions 302 and swings as the outer diameter of a part of the plurality of second abutment portions 302 changes; when the weight portion 224 of the lower second normally open ratchet 22b contacts the second abutting portion 302 as the outer diameter of another portion of the plurality of second abutting portions 302 changes, the weight portion 224 of the lower second normally open ratchet 22b slightly swings downward.

In fig. 4 and 7, when the rotary plate 20 rotates at less than the predetermined rotation speed, the gravity center portion 224 of the first normally open ratchet tooth 22a located above is kept in contact with the outer edge of a part of the second abutment portions 302, and the vertical distance between the highest point of the part of the second abutment portions 302 and the lowest point of the gravity center portion 224 of the first normally open ratchet tooth 22a located above is a first distance D1; the gravity center part of the second normally open ratchet 22b located below is in contact with the outer edge of another part of the second abutting parts, and the vertical distance between the lowest point of another part of the second abutting parts and the highest point of the gravity center part of the normally open ratchet located below is a second distance; the first distance D1 is greater than the second distance D2.

Therefore, when the dial 20 is rotated at less than the predetermined rotation speed, the weight portion 224 of the first normally open ratchet 22a located above significantly collides with one of the second abutments 302 to be sprung up and resists the gravity that makes the weight portion 224 located downward, as shown in fig. 4 to 6, as compared with the second normally open ratchet 22b located below.

Therefore, the falling protector 1 according to a preferred embodiment of the utility model can avoid the problem that the first normally open ratchet 22a and the second normally open ratchet 22b are locked due to dust and sand, and further improve the safety of the falling protector 1 during use. In addition, since the center of gravity portion 224 of the first normally open ratchet tooth 22a located above is kept in contact with the outer edge of a part of the plurality of second abutment portions 302 and swings as the outer diameter of a part of the plurality of second abutment portions 302 changes in a natural state, the first abutment portion 222 of the second normally open ratchet tooth 22b located below is kept in contact with the outer edge of another part of the plurality of second abutment portions 302 and swings as the outer diameter of another part of the plurality of second abutment portions 302 changes; when the dial 20 is rotated at the predetermined rotation speed or more, the center of gravity portion 224 of the first normally open ratchet tooth 22a located above is collided with the outer edge of a part of the plurality of second abutment portions 302 to be sprung up, and resists the gravity which makes the gravity center part 224 downward, and at the same time makes the gravity center part 224 of the first normally open ratchet 22a which is positioned above spring upward with the same direction as the centrifugal force of the rotation disk 20 and larger than the pulling force of the plurality of elastic members 226 to the gravity center part 224, further, the weight portion 224 of the first normally open ratchet 22a located above is thrown outward, and at this time, the first contact portion 222 of the first normally open ratchet 22a located above moves from the first position to the second position and contacts with the second contact portion 302 of the brake device 30, so that the rotation of the dial 20 is stopped.

On the other hand, the gravity center portion 224 of the second normally open ratchet 22b located below is acted by downward gravity, and the gravity is in the same direction as the rotating centrifugal force of the rotating disc 20 and is greater than the pulling force of the plurality of elastic members 226 on the gravity center portion 224, so that the gravity center portion 224 of the second normally open ratchet 22b located below is thrown outward, at this time, the first abutting portion 222 of the second normally open ratchet 22b located below abuts against the second abutting portion 302 of the braking device 30 to stop the rotation of the rotating disc 20, thereby ensuring that both the first normally open ratchet 22a and the second normally open ratchet 22b can abut against the second abutting portion 302 of the braking device 30, maintaining the normal braking effect, and avoiding the life hazard caused by the direct falling of the user.

In a preferred embodiment of the present invention, the gravity center portion 224 of the first normally open ratchet 22a and the second normally open ratchet 22b includes a roller 225, and the roller 225 is configured to contact outer edges of the plurality of second abutting portions 302, so as to generate a smoother relative movement between the gravity center portion 224 and the plurality of second abutting portions 302, and prevent the gravity center portion 224 of the first normally open ratchet 22a and the second normally open ratchet 22b from repeatedly and directly striking the outer edges of the second abutting portions 302 of the braking device 30, which may cause structural damage to the safety catcher 1.

Through the design of the utility model, a user can pull the safety belt of the safety hook in advance, and the normally open ratchet can be known to be not blocked by the vibration generated when the normally open ratchet swings, so as to confirm the normal action of the safety hook. The falling protector provided by the utility model comprises a plurality of normally open ratchets, and when the normally open ratchets rotate to different positions (such as the highest point or the lowest point), each normally open ratchet can be respectively matched with external elasticity or gravity generated by the contact of the normally open ratchets and a braking device to generate a synergistic effect (namely the acting force direction is the same) on the centrifugal force thrown out by the braking block, so that each normally open ratchet can be really clamped with the braking device to stop the rotation of a turntable, the falling of personnel is stopped or the falling speed is slowed down, and the life safety of the personnel is guaranteed.

The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications to the present invention as described and claimed should be included in the scope of the present invention.

Claims

1. a fall arrester, is characterized in that, comprises:

a bracket having a first arm and a second arm;

A turntable is pivoted on the bracket and located between the first support arm and the second support arm; the turntable includes a main body and a plurality of normally open ratchet teeth, wherein the main body has an accommodating part and a setting part, the accommodating part is used for a flexible elongated body to be wound thereon; each of the normally open ratchet teeth has a first abutting part and a pivot, and the A plurality of normally open ratchet teeth are pivoted on the setting portion through the pivot shaft, and when the turntable rotates at a speed greater than or equal to a predetermined rotation speed, the first abutting portion is generated to move from a first position to a pivoting in the second position;

A braking device has a convex portion, and the braking device is fixedly combined with the first support arm by the convex portion, so that the braking device is located between the first support arm and the turntable. Between the setting parts; the braking device further has a plurality of second abutting parts, and the plurality of second abutting parts are arranged to follow when the first abutting part is located at the second position. on the rotation path formed by the rotation of the turntable, and can abut with the first abutting portion to stop the rotation of the turntable;

Wherein, each of the normally open ratchets also has a center of gravity, and the center of gravity of each of the normally open ratchets and the first abutting portion are located on different sides of the pivot; When rotating at less than the predetermined rotational speed, the center of gravity portion of each of the normally open ratchet teeth is in contact with an outer edge of a part of the plurality of second abutting portions, and is abutted with the plurality of second abutting portions. The outer diameter of a part of the part oscillates.

2 . The fall arrester according to claim 1 , wherein in a natural state and without the resistance of the second abutting portion, each of the normally open ratchet teeth is directed toward the center of gravity from the first abutting portion. 3 . The part is inclined.

3. The fall arrester of claim 2, wherein, in the longitudinal direction of the fall arrester, when the turntable rotates, one of the plurality of normally open ratchets is located at the plurality of normally open teeth Above the other one of the ratchet teeth, when the turntable rotates at less than the predetermined rotational speed, the center of gravity of the normally open ratchet tooth located above is kept in contact with a part of the plurality of second abutting parts. The outer edges are in contact, and the vertical distance between the highest point of a part of the plurality of second abutting parts and the lowest point of the center of gravity of the normally open ratchet located above is a first distance; and The center of gravity of the normally open ratchet located below is in contact with the outer edge of another part of the plurality of second abutting parts, and the lowest point of the other part of the plurality of second abutting parts The vertical distance from the highest point of the center of gravity of the normally open ratchet tooth located below is a second distance; the first distance is greater than the second distance.

4. The fall arrester according to claim 3, wherein when the turntable rotates at a speed greater than or equal to the predetermined rotation speed, the center of gravity of the normally open ratchet located above is affected by the plurality of first rotations. A part of the outer edges of the two abutting parts collides and bounces up, and is thrown out due to the centrifugal force of the rotation of the turntable, so that the first abutting part of the normally open ratchet located above is free from the The first position is pivoted to the second position, so that the first abutting portion of the normally open ratchet located above is abutted with one of the second abutting portions; at the same time, the lower The center of gravity of the normally open ratchet is slung downward by gravity, and is thrown outward due to the centrifugal force of the rotation of the turntable, so that the first abutting portion of the normally open ratchet located below is free from its position. The first position is pivoted to the second position, so that the first abutting portion of the normally open ratchet located below abuts the other one of the second abutting portions.

5 . The fall arrester of claim 1 , wherein the center of gravity portion of each of the normally open ratchet teeth comprises a roller for contacting the outer edges of the plurality of second abutting portions. 6 .

6 . The fall arrester of claim 1 , wherein each of the normally open ratchets comprises an elastic piece, one end of the elastic piece is fixed to the body of the normally open ratchet, and the other end of the elastic piece is fixed to the body of the normally open ratchet. 7 . connected to the setting part of the turntable.

7 . The fall arrester of claim 1 , wherein the number of the plurality of normally open ratchet teeth is two; the two normally open ratchet teeth are arranged on the surface of the setting portion and are symmetrical to each other. 8 . are arranged on opposite sides of the center of the turntable.