TW201914647A - Fall arrester capable of increasing the reliability in emergent locking - Google Patents

Abstract

A fall arrester includes a holder, a rotating member, a safety belt, a brake disc, a brake block and a return spring. The holder includes a first side plate and a second side plate, and the first side plate has an outer side surface formed thereon with a stopping block. The rotating member is rotatably disposed on the holder. The safety belt is wound on the rotating member. The brake disc is combined with the rotating member, and has a groove. The brake block is pivotally disposed on the brake disc, and is disposed between the inner side surface of the brake disc and the outer side surface of the first side plate. As a result, the groove may accommodate a portion of the body of the return spring to prevent the return spring from propping up the brake block in a direction away from the surface, so as to cause the brake block to rub against the first side plate.

Description

Fall arrester

The invention relates to a fall arrester; in particular to a fall arrester suitable for hanging a work place.

When working in a high place, the staff will be equipped with a fall arrester containing a seat belt, the fall arrester is fixed on a support, and the seat belt is attached to the person to prevent the person from falling, thereby ensuring the personnel. Security.

1 shows a fall arrester 1 comprising a housing 10, a bracket 12 in the housing 10, a rotating member 14, a safety belt 16, a take-up device 18, a brake disc 20 and two brake pads 22. Wherein, the outer casing 10 is formed by combining two half shells 102. 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. The first side plate 122 is provided with a stopping block 122a. The seat belt 16 is wound around the rotating member 14. The take-up device 18 is disposed on the outer side of the second side panel 124 and has a scroll spring 182 coupled to the rotating member 14 for providing a force to retract the seat belt 16. The brake disc 20 is located outside the first side panel 122 and 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 panel 122. The brake block 22 is pivotally disposed on the pivot 202a of the outer side 202 of the brake disk 20, and the brake block 22 is located between the outer casing 10 and the first side plate 122. The brake block 22 is pivoted from a retracted position to a deployed position by the centrifugal force generated by the rotation of the brake disc 20 and abuts against the stop block 122a to restrict the rotation of the rotating member 14.

2, when the person accidentally falls, in the normal state, when the brake block 22 is pivoted to the deployed position, the blocking portion 222 of the brake block 22 abuts the stop block 122a on the first side plate 122, The rotation of the rotating member 14 is stopped by the action of the emergency locking to prevent the worker from continuously falling.

However, the place where the fall arrester 1 is used is mostly in a dusty state, and the dust easily adheres to the pivotal joint of the brake block 22, and the brake block 22 is stuck, and cannot be pulled out in an emergency, thereby causing the function of the emergency lock to be disabled. . To this end, the pivotal joint between the brake pad 22 and the brake disc 20 is designed to loosely engage to prevent the brake block 22 from being stuck due to a small amount of dust.

However, the aforementioned loose fit design will give the brake block 22 a chance to yaw in a direction away from the outer side 202 of the brake disc 20 (see Figure 3 for reference). At this time, if the distance between the outer casing 10 and the outer side surface 202 of the brake disc 20 is too large due to factors such as assembly tolerances, the stopper portion 222 of the brake block 22 and the stopper block 122a may be alternately passed, resulting in an emergency lock. The case where the effect is invalid.

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

In order to achieve the above object, the present invention provides a fall arrester comprising a bracket, a rotating member, a seat belt, a brake disc, a brake block and a return spring, wherein the bracket has a first facing surface. a side panel and a second side panel, the first side panel has an outer side facing away from the second side panel; the outer side surface is provided with a stopping block; the rotating member is rotatably disposed on the first side panel of the bracket and the first side panel a second side plate; the safety belt is wound on the rotating member and 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 disk is coupled to the rotating member and has a The inner side faces the outer side of the first side panel; the brake block is pivotally disposed on the inner side of the brake disc and located between the inner side of the brake disc and the outer side of the first side panel; the brake block has a stop The blocking portion of the brake block is pivoted from a retracted position to a deployed position by a centrifugal force generated by the rotation of the brake disc to abut the stop block to restrict rotation of the rotating member; a return spring is coupled to the brake pad and Between the brake disc to the brake pad driven to the folding position.

The effect of the present invention is that, by limiting the position of the brake block by the first side plate and the brake disk, it can be ensured that the brake block can abut against the stop block in the deployed position, without the conventional fall prevention. The device is interleaved with the stop block when the brake block is yawed in the deployed position, and the reliability of the emergency lock of the fall arrester is effectively increased.

In order to explain the present invention more clearly, a preferred embodiment will be described in detail with reference to the drawings. Referring to FIG. 4 to FIG. 9 , a fall arrester 100 according to a preferred embodiment of the present invention includes a housing 10 , a bracket 14 located in the housing 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 block 40 and at least one return spring 42.

The outer casing 10 is formed by the two casings 12 being joined together. The housings 12 each have a first chamber 12a, a second chamber 12b and an opening 12c separated from each other. When the two housings 12 are engaged, they are relatively joined by their openings 12c. The outer 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 at two. The first chamber 12a of the housing 12 is located; the second side panel 20 is located in the second chamber 12b of the two housings 12. The first side plate 18 has an outer side surface 182 opposite to the second side plate 20, and the outer side surface 182 is provided with at least one stop block 182a, which in the embodiment is three stop blocks 182a. The first side panel 18 has a perforation 18a. A loop 22 projects from the top opening 10a of the outer 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, wherein the two ends of the shaft 242 respectively pass through the first of the brackets 14 The perforation of the side panel 18 and the second side panel 20; the drum 244 is attached to the shaft 242 and rotates coaxially with the shaft 242, and a portion of the drum 244 is exposed inside the perforation 18a.

The safety 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 safety belt 26 is connected to the rotating drum 244 and wound on the rotating drum 244, and the other end is And extending downwardly from the bottom opening of the outer casing 10, the safety belt 26 is pulled to drive the rotating drum 244 and the shaft 242 to rotate.

The casing 28 is located in the second chamber 12b of the two casings 12 and is connected to the second side plate 20 of the bracket 14. The casing 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, and the inner end of the scroll spring 30 is coupled to the rotating member 24, and the outer end of the scroll spring 30 is coupled to the casing 28.

The brake disc 32 is coupled to the rotating member 24 and has an inner side 322 facing the outer side surface 182 of the first side panel 18, and the brake disc 32 is coaxially rotated with the rotating member 24. In this embodiment, the brake disk 32 has a disk shape, 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. A length 342 is equal in diameter and the through hole 18a passing through the first side plate 18 is coupled to the rotating drum 244 of the rotating member 24, and the first portion 342 has a shaft hole 342a for the shaft 242 to penetrate; the second portion 344 is tapered. The outer diameter of the second section 344 is gradually diverged from the first section 342 toward the inner side 322. By virtue of this diverging design, the strength of the brake disc 32 can be increased and the brake disc 32 can be rotated with the first side panel 18. The degree of interference is minimal. In addition, the inner side 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, and each pivot shaft 36 and each fixing post 38 Located on opposite sides of the convex axis 34, respectively.

The inner side 322 of the brake disc 32 has a surface 324 that is recessed to define at least one recess 326, which in this embodiment is a recess 326. One end of each fixing post 38 is coupled to the groove surface 326a of each groove 326 and protrudes out of the groove 326.

The number of the brake blocks 40 is two in the embodiment, and each brake block 40 has a pivot hole 402. The diameter of the pivot hole 402 is larger than the outer diameter of the pivot 36 on the brake disk 32, and the brake block 40 is pivoted. The pivot 36 is pivotally disposed on the inner side 322 of the brake disc 32 such that the brake block 40 is located within the space between the inner side 322 of the brake disc 32 and the outer side 182 of the first side panel 18. The pivot hole 402 of the brake block 40 is loosely engaged with the pivot 36 to prevent dust from entering between the pivot shaft 36 and the pivot hole 402. The brake block 40 can be pivoted between a deployed position (refer to FIG. 10) and a collapsed position (refer to FIG. 11), and each brake block 40 has a stop portion 404, and the stop portion 404 of the brake block 40 follows the brake disc. The centrifugal force generated by the rotation 32 is pulled out to the deployed position for abutting against the stopper 182a, thereby restricting the rotation of the rotating member 24.

The return spring 42 is coupled between the brake block 40 and the brake disc 32 for driving the brake block 40 toward the retracted position such that the stop portion 404 of the brake block 40 is normally within the range of the outer circumference of the brake disc 32. The number of the return springs 42 is two in the embodiment, and one end of each return spring 42 is connected to each brake block 40 and is located beside the stopping portion 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 326a of each groove 326 (see FIG. 7 for reference) whereby the return spring 42 is brought close to the surface 324 of the brake disk 32 to bring the brake block 40 close to the surface 324 of the brake disk 32. Each return spring 42 has a body 424 for generating an elastic force. A portion of the body portion 424 protrudes into the recess 326. When the brake block 40 is in the folded position, the return spring 42 is located in the recess 326. In the projection range. A portion of the body 424 can be received by the design of the recess 326 to prevent the return spring 42 from propelling the brake block 40 away from the surface 324 such that the brake block 40 rubs against the first side panel 18.

When a person accidentally falls, the seat belt 26 will be pulled sharply, and the rotating member 24 and the brake disk 32 are rotated rapidly to cause the brake block 40 to be subjected to centrifugal force and overcome the elastic force of the return spring 42 and to be outwardly turned out. One of the brake blocks 40 abuts against one of the stop blocks 182a to restrict the rotation of the rotating member 24 and fix the length of the safety belt 26 to be pulled out, so as to prevent the person from falling continuously.

It is more worth mentioning that by limiting the position of the brake block 40 by the first side plate 18 and the brake disk 32, it can be ensured that the stop portion 404 can abut against the stop block 182a when the brake block 40 is in the deployed position, without Conventional fall arresters occur when the brake block is biased and staggered with the stop block in the deployed position.

In order to prevent dust from being caught in the pivotal joints of the brake pads 40 and the brake discs 32, such that the brake pads 40 cannot be pivoted to cause an accident, the present invention further designs a brake block 40, and a brake pad 40 is used. An example is as follows:

The brake block 40 further has a receiving portion 406, and the pushed portion 406 and the stopping portion 404 are respectively located on opposite sides of the pivot hole 402. The abutted portion 406 moves along a moving path as the brake disk 32 rotates, and the stopper piece 182a is located on the moving path of the pushed-up portion 406. In this embodiment, one of the outer edges 406a of the abutted portion 406 protrudes away from the pivot hole 402 and beyond the outer circumference of the brake disk 32. Whenever the pushed portion 406 passes the stop block 182a, the blocked block 182a is pushed against it, and the brake block 40 is pivoted outward from the folded position (see FIG. 11) (see FIG. 12 for reference).

Thereby, the person can pull the seat belt 26 in advance, that is, the vibration generated by the brake block 40 when pivoting, the brake block 40 is not stuck, to confirm that the fall arrester 100 can be normally operated. It is worth mentioning that, in case the brake block 40 is stuck and cannot be pivoted, the pushed portion 766 of the brake block 40 will abut against the stop block 182a, and the rotation of the rotating member 24 is restricted to further prevent personnel from continuing. Falling causes the fall arrester 100 to have a double protection effect.

The above is only a preferred embodiment of the present invention, and equivalent changes to the scope of the present invention and the scope of the patent application are intended to be included in the scope of the present invention.

[customary]

1‧‧‧ fall arrester

10‧‧‧ Shell

102‧‧‧ half shell

12‧‧‧ bracket

122‧‧‧First side panel

122a‧‧‧ block

124‧‧‧ second side panel

14‧‧‧Rotating parts

16‧‧‧Safety belt

18‧‧‧Retracting device

182‧‧‧ Scroll spring

20‧‧‧ brake disc

202‧‧‧Outside

202a‧‧‧ pivot

22‧‧‧ brake pads

222‧‧‧stops

[this invention]

100‧‧‧ fall arrester

10‧‧‧ Shell

10a‧‧‧Top opening

12‧‧‧ housing

12a‧‧‧First room

12b‧‧‧Second room

12c‧‧‧ openings

14‧‧‧ bracket

16‧‧‧Main frame

18‧‧‧First side panel

18a‧‧‧Perforation

182‧‧‧Outside

182a‧‧‧ block

20‧‧‧ second side panel

22‧‧‧ rings

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‧‧‧ slotted surface

34‧‧‧Shaft axis

342‧‧‧ first paragraph

342a‧‧‧Axis hole

344‧‧‧ second paragraph

36‧‧‧ pivot

38‧‧‧Fixed column

40‧‧‧ brake pads

402‧‧‧Pivot hole

404‧‧‧stops

406‧‧‧Subjected

406a‧‧‧ outer edge

42‧‧‧Return spring

422‧‧‧ ring

424‧‧‧ Body

Fig. 1 is an exploded perspective view of a known fall arrester. Fig. 2 is a schematic view showing that the stopper of the brake block abuts against the stopper. Fig. 3 is a schematic view showing that the stopper portion of the brake block is deviated from the normal position and cannot abut against the stopper. 4 is a perspective view of a fall arrester in accordance with a preferred embodiment of the present invention. Figure 5 is an exploded view of the fall arrester of the above preferred embodiment. Figure 6 is a perspective view of the brake disc and the brake pad of the above preferred embodiment. Figure 7 is a partial side elevational view of Figure 5. Figure 8 is a side elevational view of the fall arrester after hiding the second housing. Figure 9 is a cross-sectional view of Figure 8. Figure 10 is a schematic view showing the brake block abutting the stop block in the deployed position. Figure 11 is a schematic view showing the brake block in the collapsed position and past the stop block. Figure 12 is a schematic view showing that the pushed-up portion of the brake block is pushed by the stop block to pivot outward.

Claims (10)

A fall arrester comprising: a bracket having a first side panel and a second side panel facing each other; the first side panel is provided with a stopping block; a rotating member rotatably disposed on the bracket a side panel and the second side panel; a safety belt wound around the rotating member and located between the first side panel and the second side panel, the webbing being pulled to drive the rotating member to rotate; a brake disc, combined a rotating block; a brake block pivotally disposed on the brake disk; the brake block having a stop portion, the stop portion of the brake block being subjected to a centrifugal force generated by the rotation of the brake disk by a retracting position Pivoting to an unfolded position and abutting against the stop block to restrict rotation of the rotating member; a return spring coupled between the brake block and the brake disc for driving the brake block to a retracted position Wherein the brake disc has a surface, the surface is concavely formed with a groove, and the return spring is located in the orthographic projection range of the recess when the brake block is in the folded position. The fall arrester of claim 1, wherein the brake disc is provided with a fixing post, one end of the fixing post is coupled to a groove surface of the groove; the return spring is connected at one end to the brake block and is located beside the stopping portion The other end has a loop sleeve on the fixed post. The fall arrester of claim 1, wherein the return spring has a body with a portion of the body projecting into the recess. The fall arrester of claim 2, wherein the loop of the return spring is located between the surface and the groove surface. The fall arrester of claim 1, wherein one end of the return spring is coupled to the stop of the brake block. The fall arrester of claim 1, wherein the first side panel has an outer side facing away from the second side panel, the outer side is provided with the blocking block; the brake disc has an inner side facing the inner side The outer side surface has the surface. The fall arrester of claim 6, wherein the inner side of the brake disc is provided with a pivot shaft, the brake block has a pivot hole sleeved on the pivot shaft; wherein the brake block has a push-up portion, The abutting portion and the stopping portion are respectively located on opposite sides of the pivot hole; the pushed portion moves along a moving path as the brake disk rotates; the stopping block is located at the pushed portion In the path, when the pushed portion passes through the stop block, the block is pushed by the block to pivot the brake block. The fall arrester of claim 7, wherein the brake disc has an outer circumference; an outer edge of the pushed portion protrudes away from the pivot hole and beyond the outer circumference; When the portion passes through the stop block, the outer edge passes through and abuts the stop block. The fall arrester of claim 6, wherein the first side plate of the bracket has a through hole; the inner side of the brake disk is provided with a convex shaft, and the protruding shaft includes a first segment and a second segment connected The first segment passes through the through hole of the first side plate and is coupled to the rotating member, and the outer diameter of the second portion is gradually expanded from the first segment toward the inner side. The fall arrester of claim 1, wherein the return spring is located in an orthographic projection range of the groove when the brake block is in the deployed position.