TWM529524U - Anti-dropping device - Google Patents

Description

Fall arrester (1)

This creation is related to the fall arrester; in particular, it is a fall arrester suitable for use in high-altitude work places.

Generally, in high-altitude work sites such as roofs, factories, elevator repairs, shipbuilding, aerospace bases, and construction sites, most people are urged to equip their work with safety parts such as fall arresters (fall arresters). A lifebelt is connected and used, and one end of the lifebelt is attached to the worker's body, so that when the worker accidentally falls from a high altitude, the fall arrester can urgently lock or cushion the lifebelt. Actions to prevent personnel from continuing to fall or to buffer the speed of the person's fall, thus ensuring the personal safety of the staff.

At present, the anti-dropping devices visible in the market mainly have the following aspects. For example, there is a design that is elastically stretchable on the structure of the life-saving belt of the fall arrester, thereby having a lifebelt. When the person falls, the elastically stretchable lifebelt can be used to cushion and slow down the person's fall speed. However, such a design must take into account factors such as the length of the lifebelt, the elastic stretch factor, the height of the aerial work to be matched, and the weight of the person, and it is highly probable that if the working height does not match the ideal length of the lifebelt. The life belt has rebounded and the personnel have fallen to the ground and are missing.

In addition, there is a fall arrester designed such that one of the life belts is stitched in an overlapping manner, whereby when the person falls, the portion of the life belt overlapping and stitching is torn apart by the force, thereby Absorb the energy of the part of the person to achieve the cushioning effect. However, such a design would cause structural damage to the lifebelt, so that the strength and bearing capacity of the lifebelt decreased, and there was a danger.

In addition, another type of fall arrester adopts a quick lock mode, that is, when a person falls and generates an instantaneous pulling force, the fall arrester will urgently lock the life belt so that the life belt does not continue to fall. Among them, although such a design can achieve the effect of immediately preventing the person from falling, the instantaneous impact force (such as G-Force) and reaction force generated at the moment of emergency stop may cause internal injuries or even bone fracture. Unexpected circumstances occur and there are areas for improvement.

In view of this, the purpose of this creation is to provide a fall arrester to avoid people falling from high altitude.

In order to achieve the above object, the present invention provides a fall arrester for connecting to a lifebelt, which comprises a frame body, a shaft rod, a speed reducing member and a rotating drum. The frame has an accommodating space; the shaft is disposed on the frame; the speed reducing member is rotatably pivoted on the shaft and located in the accommodating space, the speed reducing member has a friction surface; The rotating sleeve is sleeved on the speed reducing member and has an outer annular surface and an inner annular surface, wherein the outer annular surface is wound by the lifebelt, and the inner annular surface is matched with the friction surface of the speed reducing member; In a first operating state, the speed reducing member rotates coaxially with the rotating drum; in a second operating state, the speed reducing member is fixed and the rotating drum is rotatable relative to the speed reducing member, and the friction surface of the speed reducing member A rotational friction is generated between the inner annulus of the drum to slow the rotation of the drum, thereby buffering the speed at which the life belt descends.

The effect of the creation is that, through the cooperation design of the friction surface of the speed reducer and the inner ring surface of the drum, the speed reducer does not affect the rotation of the drum when the worker is in the normal normal first operation state; When the staff does not fall from high altitude, they enter the second operating state. At this time, a rotating friction force will be generated between the speed reducing member and the rotating drum to slow down the rotating drum speed, thereby achieving the speed of the cushioning life belt or limiting the life belt. The effect of the speed of descent.

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. 1 to FIG. 2, the fall arrester 100 of the preferred embodiment of the present invention is connected to a lifebelt 200 for attaching to a worker's body. 100 includes a body 10, a shaft 20, a deceleration member 30, a drum 40, a turntable 50, a brake assembly 60, a side cover 70, and a scroll spring 80.

The frame body 10 includes a bracket 12 and a lifting ring 14 coupled to the top of the bracket 12. The bracket 12 is generally ㄇ-shaped and is formed with an accommodating space 120. The bracket 12 has two facing faces. The side plates 121 and 122 respectively define a shaft hole 123 and 124 at opposite positions of the two side plates 121 and 122. In addition, a first blocking portion 125 is formed on the side plate 121. Preferably, in the embodiment, two first blocking portions 125 are provided, and the two first blocking portions 125 are connected. The first blocking portion 125 is a protrusion formed by the side plate 121 protruding toward the receiving space 120. The lifting ring 14 is used for hanging or fixing on a stable support, and can be used as a point, for example, can be hung on a support such as a cable or a beam.

The two ends of the shaft 20 are respectively fixed in the two axial holes 123 and 124, and the outer ring surface of the shaft 20 is provided with an axially extending slot 22 near the end. The slot 22 is One end of the scroll spring 80 is fixedly coupled. The combined shaft 20 is not rotatable relative to the frame 10.

The speed reducing member 30 is rotatably pivoted on the shaft 20 and located in the accommodating space 120. The speed reducing member 30 has a friction surface 31. In the embodiment, the outer ring surface of the speed reducing member 30 A plurality of axially extending and spaced ribs 32 are provided, and the top surfaces of the ribs 32 together form the friction surface 31. Further, a plurality of screw holes 33 are formed in one end surface of the speed reducer 30.

The drum 40 is sleeved on the speed reducer 30. The drum 40 includes a tray 42 , a sleeve 44 and a set of rings 46 . The seat plate 42 has four locating holes 420. The sleeve 44 is coupled to one side of the seat plate 42. The sleeve 44 has an inner annular surface 440 and the inner ring surface 440 and the speed reducer 30. The friction surface 31 cooperates; the collar 46 surrounds the periphery of the sleeve 44, and the collar 46 has an outer annular surface 460 and a notch 462. As shown in FIG. 5, in this embodiment, one end of the lifebelt 200 is clamped between the sleeve 44 and the collar 46, and the lifebelt 200 extends from the notch 462 and is wound around The outer annular surface 460 of the collar 46. In addition, in an embodiment, the drum 40 may only be provided with the seat plate 42 and the sleeve 44, and it is not necessary to set the collar 46. At this time, the sleeve 44 is inside and below. The outer annulus facing away from the toroidal surface 440 is wrapped by the lifebelt 200.

The turntable 50 includes a turntable body 52 and a positioning block 54. The turntable body 52 has a center hole 520. One end of the shaft 20 passes through the center hole 520 to sleeve the turntable body 52 on the shaft 20. The turntable body 52 is located in the accommodating space 120 and is located at one side of the rotating drum 40. Further, a plurality of through holes 530 are formed around the central hole 520, and one side surface of the turntable body 52 is There are two pivot posts 521 and two limit posts 522. The positioning block 54 is connected to one side of the turntable body 52, and the positioning block 54 also has a central hole 540 and a plurality of through holes 550. One end of the shaft 20 also passes through the center hole 540 to make the positioning block 54. The pivot is disposed on the shaft 20. In addition, the plurality of bolts 300 are respectively inserted through the through holes 550 of the positioning block 54 and the through holes 530 of the rotating body 52, and then locked into the screw holes 33 of the speed reducing member 30, so that the positioning block 54 is engaged. The turntable body 52 and the speed reducer 30 are connected and fixed to be coaxially rotatable (or synchronously rotated). In addition, in an embodiment, the turntable body 52 and the positioning block 54 can be integrally formed without limitation of the above separate design.

As shown in FIG. 3 together, in the present embodiment, two sets of brake assemblies 60 are provided. For convenience of explanation, one of the brake assemblies 60 is illustrated. The brake assembly 60 includes a brake block 62 and a return spring 64. The brake block 62 has a pivot hole 620. The brake block 62 is sleeved on the pivot post 521 and pivotally connected to the turntable 50. One end of the return spring 64 is connected to one end of the brake block 62, and the other end is connected to the positioning block 54. Thereby, the return spring 64 provides an elastic force, so that the brake block 62 has an inner portion at any time. The braking block 62 is positioned by the elastic force of the return spring 64. For example, the traction brake block 62 is abutted against the limiting post 522, so that the braking block 62 is not in contact with the frame 10. .

The side cover 70 is disposed in the accommodating space 120 and is connected to the rotating drum 40 and coaxially rotated. In the embodiment, the side cover 70 includes a first cover body 72 and a second cover body 74. . The first cover body 72 has a central hole 720, and a plurality of protrusions 721 corresponding to the positioning holes 420 of the seat plate 42 are formed on a side of the first cover body 72 facing the rotating drum 40, wherein The protrusions 721 are correspondingly engaged with the positioning holes 420 such that the side cover 70 is fixedly coupled to the rotating drum 40 for synchronous rotation; and further, formed on the outer peripheral surface of the first cover 72. The second cover 74 has a central hole 740, and a plurality of protrusions 741 corresponding to the card slots 722 are formed on the outer peripheral surface of the second cover 74. The second cover The body 74 can be engaged with the first cover 72 by correspondingly engaging the protrusions 741 in the card slots 722, and form an accommodation space for receiving the scroll springs 80.

One end 82 of the scroll spring 80 is coupled to the slot 22 of the shaft 20, and the other end is fixed to the second cover 74, and has a tendency to be wound into a roll at any time. In the embodiment, the inner ring surface of the second cover body 74 is formed with a plurality of spacing protrusions 742, and the other end 84 of the scroll spring is fixedly engaged between the adjacent two protrusions 742.

Thereby, through the above structural design, in the use situation where the staff is stable and there is no sharp fall, for example, when the person normally walks on a working platform or a pallet, it is defined as being in a first operation. In this state, the brake assembly 60 is maintained in the position of the retracted positioning, and is not in contact with the first stopping portion 125 on the frame body 10. At this time, the rotating plate 50 and the speed reducing member 30 are coupled to the rotating drum 40. And the side cover 70 is coaxially rotated (or can be rotated synchronously), and when the lifebelt 200 is stretched, for example, when the worker with the lifebelt 200 is away from the fall arrester 100 and the lifebelt 200 is stretched, Since one end 84 of the scroll spring 80 is fixed to the side cover 70, the scroll spring 80 is stretched as the lifebelt 200 is stretched, so that a recovery force of a roll of the roll can be accumulated ( In addition, when the worker approaches the fall arrester 100, the force of the stretched lifebelt 200 will be weakened and less than the elastic force of the scroll spring 80. At this time, the scroll spring 80 will elastically recover and be stored. Roll, and then drive the lifebelt 200 together and rewind The rotary drum 40.

In another use case, when the lifebelt 200 is suddenly stretched instantaneously, for example, when a person with the lifebelt 200 inadvertently falls from a high altitude, the lifebelt 200 will be sharply stretched, which is defined as In a second operating state, as shown in FIG. 3 to FIG. 5, the brake block 62 is subjected to a moment or subjected to a centrifugal force to overcome the elastic force of the return spring 64, and is pivoted outwardly with the pivot post 521 as a fulcrum. a first portion 621 of the brake block 62 abuts against the first stop portion 125 of the bracket 12, and a second portion 622 of the brake block 62 abuts against a second stop portion of the positioning block 54 541. At this time, the turntable 50 is fixed by the engagement of the brake assembly 60 and the bracket 12, and the speed reducer 30 fixed to the turntable 50 is also fixed without rotating. Thereafter, the rotating drum 40 is continuously rotated by the tensile force of the lifebelt 200, and the inner ring surface 440 of the rotating drum 40 is coupled with the friction surface 31 of the fixed speed reducing member 30, and is coupled to the rotating drum 40. When rotating relative to the speed reducer 30, the friction surface 31 of the speed reducer 30 will generate rotational friction with the inner ring surface 440 of the drum 40, thereby slowing or limiting the rotational speed of the drum 40, thereby achieving a cushioned lifebelt. The purpose of stretching and descending speed and the falling speed of the person being tied.

In order to achieve the ideal anti-drop device buffering and deceleration effect, the tolerance between the inner ring surface 440 of the rotating drum 40 and the friction surface 31 of the speed reducing member 30 is designed to be between 0 mm and 0.3 mm, or The tolerance is less than 30, or the absolute distance between the inner ring 440 and the friction surface 31 is between 0 mm and 0.3 mm. Among them, the above-mentioned selection of the tolerance value can be arbitrarily selected according to the bearing capacity and the weight requirement of the person using the same.

In addition, in an embodiment, the inner annular surface 440 of the rotating drum and the friction surface of the speed reducing member can be selectively matched according to the use requirements or the material properties of the fall arrester. Clearance Fit), Transition Fit or Interference Fit.

It is worth mentioning that the above-mentioned design has the spacer protrusions 742, which has the advantage that the gap between the protrusions 742 can be retained in addition to the side cover 70 achieving the weight reduction effect while maintaining sufficient structural strength. Inadvertently invade the foreign matter inside the side cover without affecting the stretching and winding of the internal scroll spring.

In addition, in other implementations, only one, three or more sets of brake assemblies 60 may be provided instead of the two sets of brake assemblies 60.

The above description is only a preferred and feasible embodiment of the present invention. The fall arrester of the present invention can be used not only to be attached to the staff member, but also to provide a fall prevention effect when the worker falls, or to be attached to construction materials and implements. On the same object, the same effect can be achieved to prevent rapid falling. Equivalent changes in the scope of the application and the scope of the patent application should be included in the scope of the patent.

[This creation]
100‧‧‧ fall arrester
10‧‧‧ ‧ body
12‧‧‧ bracket
120‧‧‧ accommodating space
121‧‧‧ side panels
122‧‧‧ side panels
123‧‧‧Axis hole
124‧‧‧Axis hole
125‧‧‧First stop
20‧‧‧ shaft
22‧‧‧ slotting
30‧‧‧Deceleration parts
31‧‧‧ Friction surface
32‧‧‧ Ribs
33‧‧‧ screw holes
40‧‧‧drum
42‧‧‧ seat plate
420‧‧‧Positioning holes
44‧‧‧ sleeve
440‧‧‧ Inner torus
46‧‧‧ collar
460‧‧‧ outer annulus
462‧‧‧ gap
50‧‧‧ Turntable
52‧‧‧ Turntable body
520‧‧‧ center hole
521‧‧‧ pivot
522‧‧‧Limited column
54‧‧‧ Positioning block
540‧‧‧ center hole
550‧‧‧Perforation
60‧‧‧Brake components
62‧‧‧ brake pads
620‧‧‧ pivot hole
621‧‧‧ first part
622‧‧‧Second part
64‧‧‧Return spring
70‧‧‧ side cover
72‧‧‧First cover
720‧‧‧Central hole
721‧‧‧Bumps
722‧‧‧ card slot
74‧‧‧Second cover
740‧‧‧Central hole
741‧‧‧Bumps
742‧‧‧ bumps
80‧‧‧ Scroll spring
82, 84‧‧‧ one end
200‧‧‧Lifebelt

1 is a perspective view of a fall arrester in accordance with a preferred embodiment of the present invention. Figure 2 is an exploded view of the fall arrester of the above preferred embodiment. 3 is a side perspective view of the fall arrester of the above-described preferred embodiment of the present invention, showing the position of the brake assembly in the retracted position. 4 is a side perspective view of the fall arrester of the above preferred embodiment of the present invention, showing that the brake assembly is engaged with the first stop of the frame after the brake assembly is pulled by the torque. Figure 5 is a cross-sectional view taken along line 5-5 of Figure 1.

100‧‧‧ fall arrester

10‧‧‧ ‧ body

12‧‧‧ bracket

120‧‧‧ accommodating space

121‧‧‧ side panels

122‧‧‧ side panels

123‧‧‧Axis hole

124‧‧‧Axis hole

125‧‧‧First stop

20‧‧‧ shaft

22‧‧‧ slotting

30‧‧‧Deceleration parts

31‧‧‧ Friction surface

32‧‧‧ Ribs

33‧‧‧ screw holes

40‧‧‧drum

42‧‧‧ seat plate

420‧‧‧Positioning holes

44‧‧‧ sleeve

440‧‧‧ Inner torus

46‧‧‧ collar

460‧‧‧ outer annulus

462‧‧‧ gap

50‧‧‧ Turntable

52‧‧‧ Turntable body

520‧‧‧ center hole

521‧‧‧ pivot

522‧‧‧Limited column

54‧‧‧ Positioning block

540‧‧‧ center hole

550‧‧‧Perforation

60‧‧‧Brake components

62‧‧‧ brake pads

620‧‧‧ pivot hole

64‧‧‧Return spring

70‧‧‧ side cover

72‧‧‧First cover

720‧‧‧Central hole

721‧‧‧Bumps

722‧‧‧ card slot

74‧‧‧Second cover

740‧‧‧Central hole

741‧‧‧Bumps

742‧‧‧ bumps

80‧‧‧ Scroll spring

82, 84‧‧‧ one end

200‧‧‧Lifebelt

Claims (10)

A fall arrester for connecting to a lifebelt, comprising: a frame body having an accommodating space; a shaft rod disposed on the frame body; and a speed reducing member pivotally pivoted on the shaft rod And in the accommodating space, the speed reducing member has a friction surface; and a rotating drum is sleeved on the speed reducing member, the drum has an outer ring surface and an inner ring surface, and the outer ring surface is provided The lifebelt is wound, and the inner annular surface cooperates with the friction surface of the speed reducing member; wherein, in a first operating state, the speed reducing member rotates coaxially with the rotating drum; in a second operating state, the speed reduction The drum is fixed and the drum is rotatable relative to the speed reducer, and a frictional friction is generated between the friction surface of the speed reducer and the inner annular surface of the drum to slow the rotation speed of the drum, thereby buffering the life belt The speed of the decline. A fall arrester according to claim 1, wherein a fitting tolerance between the inner annular surface of the rotating drum and the friction surface of the speed reducing member is between 0 mm and 0.3 mm. The fall arrester of claim 1, wherein the inner annular surface of the rotating drum and the friction surface of the speed reducing member are in a tight fit. The fall arrester of claim 1, 2 or 3, wherein the outer ring surface of the speed reducer is provided with a plurality of axially extending and spaced ribs, the top surfaces of the ribs forming the friction surface. The fall arrester of claim 1, further comprising a turntable and a brake assembly; the turntable is pivotally mounted on the shaft and coupled to the speed reducer; the brake assembly includes a brake block and a return spring The brake block is pivotally connected to the turntable; one end of the return spring is connected to the brake block, and the other end is connected to the turntable; in the first operating state, the brake block is positioned by the elastic force of the return spring and Not in contact with the frame; in the second operating state, the brake block is pulled by a moment to overcome the elastic force of the return spring, and is engaged with the frame to make the turntable and the deceleration The pieces are fixed. The fall arrester of claim 5, wherein the frame body has a first stop portion; and in the second operating state, a first portion of the brake block abuts against the first stop portion. The fall arrester of claim 6, wherein the turntable has a second stop portion, and a second portion of the brake block abuts the second stop portion in the second operational state. The fall arrester of claim 1, further comprising a side cover and a scroll spring; the side cover is disposed in the accommodating space, and is connected to the rotating drum and coaxially rotated; the scroll spring is disposed on Between the side cover and the rotating drum, one end of the side cover is fixed to the shaft, and the other end is fixed to the side cover. The scroll spring is used to provide the drum to generate a restoring force for retracting the life belt. The fall arrester of claim 8, wherein the outer ring surface of the shaft is provided with an axially extending slot, and one end of the scroll spring is coupled to the slot. The fall arrester of claim 8, wherein the inner ring surface of the side cover is formed with a plurality of spaced projections, and one end of the scroll spring is fixed between the adjacent two projections.