TWI674125B - Fall arrester - Google Patents

Abstract

An anti-fall device includes a bracket, a rotating member, a safety belt, a brake disc, a brake pad and a return spring. The bracket has a first side plate and a second side plate, and a stop is provided on the outer surface of the first side plate. The stopper is rotatably provided on the bracket; the safety belt is wound on the rotation member; the brake disc is combined with the rotation member and has a groove; the brake block is pivoted on the brake disc and is located on the inner side of the brake disc and the first Between the outer sides of the side plates. Thereby, the groove can accommodate a part of the body of the return spring, and the return spring is prevented from supporting the brake pad away from the surface, so that the brake pad rubs against the first side plate.

Description

Fall arrester

The invention relates to an anti-fall device; in particular, it relates to an anti-fall device suitable for hanging work places.

When working at high places, most people will be equipped with a fall arrester that includes a safety belt. The fall arrester is fixed to a support, and the safety belt is tied to the person to prevent the person from continuing to fall, thereby ensuring the person. Security.

FIG. 1 shows a fall arrester 1 including a casing 10, a bracket 12, a rotating member 14, a seat belt 16, a retracting device 18, a brake disc 20 and two brake pads 22 located in the casing 10. The shell 10 is formed by the two half shells 102 mating together. The bracket 12 has a first side plate 122 and a second side plate 124 facing each other. The rotating member 14 is rotatably disposed between the first side plate 122 and the second side plate 124. A stopper 122 a is disposed on the first side plate 122. The safety belt 16 is wound around the rotating member 14. The retracting device 18 is disposed on the outer side of the second side plate 124 and has a scroll spring 182 connected to the rotating member 14 to provide a force for rewinding the seat belt 16. The brake disc 20 is located on the outer side of the first side plate 122 and is coupled to the rotating member 14 and rotates with the rotating member 14. The brake disc 20 has an outer side surface 202 facing away from the first side plate 122. The brake pad 22 is pivoted on a pivot shaft 202 a on an outer side 202 of the brake disc 20, and the brake pad 22 is located between the casing 10 and the first side plate 122. The braking block 22 is pivoted from a collapsed position to an unfolded position by the centrifugal force generated when the brake disc 20 rotates, and abuts against the stop block 122 a to restrict the rotation of the rotating member 14.

Please refer to FIG. 2, when a person accidentally falls, in a normal state, when the brake block 22 is pivoted to the deployed position, the stop portion 222 of the brake block 22 abuts against the stop block 122 a on the first side plate 122. The function of emergency locking can be exerted to stop the rotation of the rotating member 14 so as to prevent the worker from falling continuously.

However, the place where the fall arrester 1 is used is mostly in a state of diffused dust. The dust is easily attached to the pivot joint of the brake pad 22, which causes the brake pad 22 to become stuck and cannot be thrown out in an emergency, causing the emergency lock function to fail . For this reason, the pivot joint of the brake pad 22 and the brake disc 20 is designed to fit loosely to prevent the brake pad 22 from getting stuck due to a little dust.

However, the aforementioned loose fit design will allow the brake pad 22 to deflect in a direction away from the outer side 202 of the brake disc 20 (refer to FIG. 3). At this time, if the gap between the casing 10 and the outer surface 202 of the brake disc 20 is too large due to assembly tolerances and other factors, the stopper 222 of the brake pad 22 and the stopper 122a will be staggered, causing an emergency lock A situation where the stopping effect fails.

In view of this, the object of the present invention is to provide a fall arrester which can effectively increase the reliability during emergency locking.

In order to achieve the above object, the present invention provides a fall arrester including a bracket, a rotating member, a safety belt, a brake disc, a brake pad and a return spring, wherein the bracket has a first A side plate and a second side plate, the first side plate having an outer side facing away from the second side plate; a stop block is provided on the outer side; the rotating member is rotatably provided on the first side plate and the first side plate of the bracket; Two side plates; the seat belt is wound on the rotating member and is located between the first side plate and the second side plate; the seat belt is pulled to drive the rotating member to rotate; the brake disc is coupled to the rotating member and has a The inner side faces the outer side of the first side plate; the The brake pad is pivotally disposed on the inner side of the brake disc and is located between the inner side of the brake disc and the outer side of the first side plate; the brake pad has a stopper portion, and the stopper portion of the brake pad is braked by the brake The centrifugal force generated when the disc rotates is pivoted from a closed position to an unfolded position and abuts against the stop block to restrict the rotation of the rotating member; the return spring is connected between the brake block and the brake disc To drive the brake pad to the closed position.

The effect of the present invention is that by restricting the position of the brake block by the first side plate and the brake disc, it can be ensured that the brake block can abut the stop block in the deployed position without the conventional anti-fall The device staggers with the stopper when it is in the extended position due to the deflection of the brake block, which effectively increases the reliability of the emergency lock of the fall arrester.

〔Usually〕

1‧‧‧fall arrester

10‧‧‧Shell

102‧‧‧half shell

12‧‧‧ bracket

122‧‧‧First side plate

122a‧‧‧stop

124‧‧‧Second side plate

14‧‧‧Rotating parts

16‧‧‧ Safety belt

18‧‧‧ Take-up device

182‧‧‧Scroll Spring

20‧‧‧brake disc

202‧‧‧ outside

202a‧‧‧ Pivot

22‧‧‧brake pad

222‧‧‧stop

〔this invention〕

100‧‧‧fall arrester

10‧‧‧Shell

10a‧‧‧open top

12‧‧‧shell

12a‧‧‧First Room

12b‧‧‧Second Room

12c‧‧‧ opening

14‧‧‧ bracket

16‧‧‧ main frame

18‧‧‧ the first side plate

18a‧‧‧perforation

182‧‧‧ outside

182a‧‧‧stop

20‧‧‧Second side plate

22‧‧‧ Ring

24‧‧‧Rotating parts

242‧‧‧ shaft

244‧‧‧Drum

26‧‧‧Safety Belt

28‧‧‧Box

282‧‧‧First cover

284‧‧‧second cover

30‧‧‧ scroll spring

32‧‧‧brake disc

322‧‧‧ inside

324‧‧‧ surface

326‧‧‧groove

326a‧‧‧groove

34‧‧‧ convex shaft

342‧‧‧first paragraph

342a‧‧‧shaft hole

344‧‧‧paragraph 2

36‧‧‧ Pivot

38‧‧‧Fixed post

40‧‧‧brake pad

402‧‧‧ Pivot hole

404‧‧‧stop

406‧‧‧Received Department

406a‧‧‧Rim

42‧‧‧Return spring

422‧‧‧Circle

424‧‧‧body

FIG. 1 is an exploded perspective view of a known fall arrester.

FIG. 2 is a schematic diagram showing that the stop portion of the brake block is in contact with the stop block.

FIG. 3 is a schematic diagram showing that the stopper portion of the brake pad deviates from the normal position and cannot be in contact with the stopper.

FIG. 4 is a perspective view of a fall arrester according to a preferred embodiment of the present invention.

FIG. 5 is an exploded view of the fall arrester of the above preferred embodiment.

FIG. 6 is a perspective view of a brake disc and a brake pad of the above preferred embodiment.

FIG. 7 is a partial side view of FIG. 5.

FIG. 8 is a side view of the fall arrester after the second casing is hidden.

FIG. 9 is a cross-sectional view of FIG. 8.

FIG. 10 is a schematic diagram showing that the brake block is in a deployed position and abuts against the stop block.

FIG. 11 is a schematic diagram showing that the brake block is located at the closed position and passes through the stop block.

FIG. 12 is a schematic diagram showing that the pushed portion of the brake block is pushed by the stop block and pivoted outward.

In order to explain the present invention more clearly, a preferred embodiment is described in detail below with reference to the drawings. Please refer to FIG. 4 to FIG. 9, a fall arrester 100 according to a preferred embodiment of the present invention includes a casing 10, a bracket 14 located in the casing 10, a rotating member 24, a safety belt 26, and a box. The body 28, a scroll spring 30, a brake disc 32, at least one brake pad 40, and at least one return spring 42.

The casing 10 is formed by the two shells 12 mating together. The casing 12 has a first receiving chamber 12a, a second receiving chamber 12b, and an opening 12c, which are separated from each other. When the two shells 12 are mated, they are opposed to each other with their openings 12c. The casing 10 has a top opening 10a and a bottom opening (not shown).

The bracket 14 includes a main frame body 16 and a lifting ring 22 coupled to the top of the main frame body 16. The main frame body 16 has a first side plate 18 and a second side plate 20 facing each other. The first side plate 18 is located in two The first receiving chamber 12 a of the casing 12; the second side plate 20 is located in the second receiving chamber 12 b of the two casings 12. The first side plate 18 has an outer side surface 182 facing away from the second side plate 20, and at least one stop block 182a is provided on the outer side surface 182. In this embodiment, there are three stop blocks 182a. The first side plate 18 has a perforation 18a. The suspension ring 22 protrudes from the top opening 10 a of the casing 10.

The rotating member 24 is rotatably disposed between the first side plate 18 and the second side plate 20 of the main frame body 16 and includes a shaft 242 and a rotating drum 244. Both ends of the shaft 242 pass through the first of the bracket 14 respectively. The perforation of the side plate 18 and the second side plate 20; the rotating drum 244 is provided on the shaft 242 and rotates coaxially with the shaft 242, and a part of the rotating drum 244 is exposed inside the through hole 18a.

The seat belt 26 is wound around the rotating member 24 between the first side plate 18 and the second side plate 20. More specifically, one end of the seat belt 26 is connected to the drum 244 and is wound around the drum 244. The bottom and the other ends of the casing 10 protrude downward, and the safety belt 26 is pulled to drive the drum 244 and the shaft 242 to rotate.

The box body 28 is located in the second receiving chamber 12 b of the two shells 12 and is connected to the second side plate 20 of the bracket 14. The box body 28 includes a first cover portion 282 and a second cover portion 284. The scroll spring 30 is disposed between the first cover portion 282 and the second cover portion 284. The inner end of the scroll spring 30 is connected to the rotating member 24, and the outer end of the scroll spring 30 is connected to the box body 28.

The brake disk 32 is coupled to the rotating member 24 and has an inner side surface 322 facing the outer side surface 182 of the first side plate 18. The brake disk 32 rotates coaxially with the rotating member 24. In the present embodiment, the brake disc 32 is disc-shaped, and a central portion of the inner side surface 322 is convexly formed with a convex shaft 34. The convex shaft 34 includes a first segment 342 and a second segment 344 connected to each other. A section 342 is of equal diameter and passes through the perforation 18a of the first side plate 18 and is combined with the drum 244 of the rotating member 24. The first section 342 has a shaft hole 342a for the shaft 242 to pass through. The second section 344 is tapered. The outer diameter of the second segment 344 is gradually expanded from the first segment 342 to the inner side surface 322. With the gradual expansion design, the strength of the brake disc 32 can be increased, and the brake disc 32 can be connected with the first side plate 18 when it is rotated. The degree of interference is minimal. In addition, the inner surface 322 of the brake disc 32 is provided with at least one pivot shaft 36 and at least one fixing post 38. In this embodiment, there are two pivot shafts 36 and two fixing posts 38, each pivot shaft 36 and each fixing post 38. They are respectively located on two opposite sides of the convex shaft 34.

The inner side surface 322 of the brake disc 32 has a surface 324. The surface 324 is concavely formed with at least one groove 326. In this embodiment, there are two grooves 326. One end of each fixing post 38 is connected to the groove surface 326 a of each groove 326 and protrudes outside the groove 326.

The number of the brake pads 40 is two in this embodiment, and each of the brake pads 40 has a pivot hole 402. The diameter of the pivot hole 402 is larger than the outer diameter of the pivot shaft 36 on the brake disc 32. 402 is a pivot shaft 36 pivoted on the inner side surface 322 of the brake disc 32, so that the brake pad 40 is located in a space between the inner side surface 322 of the brake disc 32 and the outer side surface 182 of the first side plate 18. Brake pad 40 The pivot hole 402 and the pivot shaft 36 form a loose fit state to prevent dust from entering between the pivot shaft 36 and the pivot hole 402 and getting stuck. The brake pads 40 can be pivoted between a deployed position (refer to FIG. 10) and a collapsed position (refer to FIG. 11), and each of the brake pads 40 has a stop portion 404, and the stop portion 404 of the brake pad 40 follows the brake disc. The centrifugal force generated during the 32 rotation is thrown out to the expanded position for abutting against the stop block 182a, thereby restricting the rotation of the rotating member 24.

The return spring 42 is connected between the brake pad 40 and the brake disc 32, and is used to drive the brake pad 40 toward the closed position, so that the stop portion 404 of the brake pad 40 is located within the outer circumference of the brake disc 32 in a normal state. The number of the return springs 42 is two in this embodiment, and one end of each return spring 42 is connected to each of the brake pads 40 and is located beside the stopper 404, and the other end has a ring 422 sleeved on the fixing post 38, and each ring The ring 422 is located between the surface 324 and the groove surface 326 a of each groove 326 (refer to FIG. 7), so that the return spring 42 approaches the surface 324 of the brake disc 32 and the brake pad 40 approaches the surface 324 of the brake disc 32. Each of the return springs 42 has a body 424 for generating elastic force, and a part of the body 424 protrudes into the groove 326. When the brake block 40 is in the closed position, the return spring 42 is located at the positive position of the groove 326. Projection range. By designing the groove 326, a part of the body 424 can be accommodated to prevent the return spring 42 from supporting the brake pad 40 away from the surface 324, so that the brake pad 40 rubs against the first side plate 18.

When a person accidentally falls, the safety belt 26 will be pulled sharply, causing the rotating member 24 and the brake disc 32 to rotate rapidly, so that the brake block 40 is subjected to the centrifugal force and overcomes the elastic force of the return spring 42 and is thrown out, thereby One of the braking blocks 40 abuts against one of the stopping blocks 182a to restrict the rotation of the rotating member 24 and fix the length of the safety belt 26 to pull out, so as to prevent the person from falling continuously.

It is worth mentioning that by restricting the position of the brake pad 40 by the first side plate 18 and the brake disc 32, it can be ensured that the stopper 404 can be connected with the stopper 182a when the brake pad 40 is in the deployed position. They do not touch each other, and there is no case where the conventional fall arrester staggers with the stopper when the brake pad is deflected.

In order to prevent dust from getting stuck at the pivot joints of the brake pads 40 and the brake discs 32, so that the brake pads 40 cannot be pivoted and accidents occur, the present invention further specifically designs the structure of the brake pads 40, and hereby uses a brake pad 40 An example is as follows:

The braking block 40 further has a pushed portion 406. The pushed portion 406 and the blocking portion 404 are respectively located on two opposite sides of the pivot hole 402. The pushed portion 406 moves along a moving path as the brake disc 32 rotates, and the stop block 182 a is located on the moved path of the pushed portion 406. In this embodiment, an outer edge 406 a of one of the pushed portions 406 is convex in a direction away from the pivot hole 402 and exceeds the outer circumference of the brake disc 32. Whenever the pushed-abutment portion 406 passes through the stopper block 182a, the stopped-up block 182a pushes the brake block 40 from the closed position (refer to FIG. 11) to the outer pivot (refer to FIG. 12).

Thereby, a person can pull the seat belt 26 in advance, and it can be known from the vibration generated when the brake block 40 is pivoted that the brake block 40 is not stuck, so as to confirm that the fall arrester 100 can normally operate. It is worth mentioning that in the event that the brake block 40 is stuck and cannot be pivoted, the pushed portion 406 of the brake block 40 will abut against the stop block 182a, and restrict the rotation of the rotating member 24, further preventing personnel from continuing Falling makes the fall arrester 100 have a double protection effect.

The above descriptions are only the preferred and feasible embodiments of the present invention, and any equivalent changes made by applying the description of the present invention and the scope of patent application should be included in the patent scope of the present invention.

Claims (10)

An anti-fall device includes: a bracket having a first side plate and a second side plate facing each other, the first side plate is provided with a stop block; a rotating member is rotatably provided on the first side plate of the bracket. A side plate and the second side plate; a safety belt wound around the rotating member and located between the first side plate and the second side plate, the safety belt being pulled to drive the rotating member to rotate; a brake disc, combined A braking block is pivoted on the brake disc; the braking block has a stop portion, and the stop portion of the brake block is subjected to a closed position by a centrifugal force generated when the brake disc rotates; Pivot to an extended position and abut the stop block to limit the rotation of the rotating member; a return spring connected between the brake block and the brake disc to drive the brake block to a closed position Wherein, the brake disc has a surface, the surface is recessed to form a groove, and when the brake pad is in the folded position, the return spring is located in an orthographic projection range of the groove. The fall arrester according to claim 1, wherein the brake disc is provided with a fixing post, one end of which is connected to a groove surface of the groove; one end of the return spring is connected to the brake pad and is located next to the stop. , The other end is provided with a loop on the fixing post. The fall arrester according to claim 1, wherein the return spring has a body portion, and a part of the body portion protrudes into the groove. The fall arrester according to claim 2, wherein the loop of the return spring is located between the surface and the groove surface. The fall arrester according to claim 1, wherein one end of the return spring is connected to the stopper portion of the brake pad. The fall arrester according to claim 1, wherein the first side plate has an outer side facing away from the second side plate, and the outer side is provided with the stopper; the brake disc has an inner side, and the inner side faces The outer side, the inner side has the surface. The fall arrester according to claim 6, wherein the inner side of the brake disc is provided with a pivot, and the brake pad has a pivot hole sleeved on the pivot; wherein the brake pad has a pushed portion, the The pushed portion and the stop portion are respectively located on two opposite sides of the pivot hole; the pushed portion moves along a moving path as the brake disc rotates; the stop block is located in the movement of the pushed portion On the path; when the pushed and abutted portion passes through the stop block, it is pushed by the stop block to pivot the brake block. The fall arrester according to claim 7, wherein the brake disc has an outer circumference; an outer edge of one of the pushed portions protrudes in a direction away from the pivot hole and exceeds the outer circumference; the pushed When the part passes the stop block, it passes through the outer edge and abuts the stop block. The fall arrester according to claim 6, wherein the first side plate of the bracket has a perforation; the inner side of the brake disc is provided with a convex shaft, and the convex shaft includes a first segment and a second segment connected to each other. The first section passes through the perforation of the first side plate and is coupled to the rotating member, and the outer diameter of the second section gradually expands from the first section toward the inner side. The fall arrester according to claim 1, wherein when the brake pad is in the deployed position, the return spring is located in an orthographic projection range of the groove.