CN114306974A - Falling protector - Google Patents
Falling protector Download PDFInfo
- Publication number
- CN114306974A CN114306974A CN202011060224.3A CN202011060224A CN114306974A CN 114306974 A CN114306974 A CN 114306974A CN 202011060224 A CN202011060224 A CN 202011060224A CN 114306974 A CN114306974 A CN 114306974A
- Authority
- CN
- China
- Prior art keywords
- normally open
- braking device
- cover
- setting part
- open ratchet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001012 protector Effects 0.000 title abstract description 7
- 239000000428 dust Substances 0.000 claims abstract description 16
- 238000004804 winding Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 8
- 239000010959 steel Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Braking Arrangements (AREA)
Abstract
A falling protector comprises a support, a rotary disc, a braking device and a dust cover. Wherein the turntable is pivoted on the bracket and is positioned in the bracket. The rotating disc comprises a body and at least one normally open ratchet, wherein the body is provided with an accommodating part and a setting part for winding the steel cable on the body. The normally open ratchet is pivoted on the setting part, and the braking device is fixedly connected on the bracket and positioned between the bracket and the setting part. When the rotary disc is rotated fast by the force of the pull-out of the steel cable, the normally open ratchet swings to make a part of the normally open ratchet abut against a part of the braking device, so as to stop the rotation of the rotary disc. The dustproof cover is fixedly arranged on the setting part, and the at least one normally open ratchet and the braking device are positioned in the dustproof cover. Therefore, the dustproof cover can prevent dust from influencing the driving of the normally open ratchet and the braking device, and the use safety is ensured.
Description
Technical Field
The invention relates to a fall arrester; in particular to a falling protector with dustproof effect.
Background
Generally, when working in high-altitude places, workers need to be equipped with a safety catch. The one end of safety hook can be connected on a support, and cable wire or safety belt in the safety hook are on staff's one's body, from this, when the staff falls from the high altitude carelessly, the sudden falling force can make arresting gear in the safety hook driven, and then avoids cable wire or safety belt to continue to be pulled out by the falling force, or reduces the speed that cable wire or safety belt were pulled out, can maintain staff's life safety.
Most of the conventional safety guards further include a housing for preventing external dust or small impurities from entering the interior of the safety guard, and the housing has an opening for the cable or the safety belt to enter and exit the housing. However, the steel cable or the safety belt is easy to bring the external dust or small impurities into the housing in the process of winding the steel cable or the safety belt back into the housing, and the substances are easy to accumulate in the braking device, thereby affecting the driving effect of the braking device, even causing the braking device to be locked to cause the falling protector to lose the original emergency locking effect, and being incapable of ensuring the working safety. Therefore, the existing anti-falling device still has the problems to be improved and has the space for improvement.
Disclosure of Invention
In view of the above, the present invention provides a fall arrester having a feature of preventing dust from accumulating in a braking device of the fall arrester and the at least one normally open ratchet and affecting the operation thereof.
The anti-falling device provided by the invention comprises a bracket, a rotating disc, a braking device and a dustproof cover. 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 two support arms; the rotary disc comprises a body and at least one normally open ratchet, wherein the body is provided with a containing part for winding a flexible strip body thereon and a setting part; the normally open ratchet is provided with a first abutting part and is pivoted on the setting part, and when the turntable 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 convex part is fixedly combined on the first support arm, so that the braking device is positioned between the first support arm and the setting part; the braking device is also provided with at least one second abutting part which can abut against the first abutting part along a rotating path formed by the rotation of the turntable when the first abutting part is positioned at the second position so as to stop the rotation of the turntable; the dustproof cover is fixedly arranged on the setting part and is positioned between the setting part and the first supporting arm; a closed space is formed between the dustproof cover and the setting part, so that the at least one normally open ratchet and the braking device are positioned in the closed space; the dust cover is provided with a hole, and the convex part penetrates out of the hole.
The dustproof cover covers the braking device and the normally open ratchet, so that the braking device and the normally open ratchet are located in a closed space formed between the dustproof cover and the setting part, and dust or small impurities are prevented from being accumulated on the braking device and the normally open ratchet to influence the operation of the braking device and the normally open ratchet.
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 perspective view of the safety catcher body according to a preferred embodiment of the present invention.
Fig. 4 is a partially exploded view of fig. 3.
FIG. 5 is a right side view of the preferred embodiment fall arrestor body with the first arm removed.
FIG. 6 is similar to FIG. 5 and shows that when the turntable is rotated abruptly, the first abutting portion is located at the second position and abuts against the second abutting portion.
FIG. 7 is similar to FIG. 6 and shows the turntable rotating speed slowing.
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 and 2, fig. 1 to 5 show a safety catch 1 according to a preferred embodiment of the present invention, the safety catch 1 includes a safety catch body 100 and a housing 200, wherein the housing 200 is formed by combining two side half shells 201, and the safety catch body 100 is located in an accommodating space surrounded by the two side half shells 201. The housing 200 has a hanging hole 200a at an upper portion thereof and a through hole 200b at a lower portion thereof.
Referring to fig. 3 and 4, the safety catcher body 100 includes a support 10, a rotating disc 20, a braking device 30 and a dust cover 40. The support 10 has a first arm 12, a second arm 14, a top plate 16 and a connecting rod 18. The upper and lower portions of the first arm 12 and the second arm 14 are respectively and fixedly connected to each other through the top plate 16 and the connecting rod 18, and the first arm 12, the second arm 14, the top plate 16 and the connecting rod 18 surround to form an accommodating space S. In addition, the top plate 16 is provided with a hanging ring 17, and the hanging ring 17 is inserted into the hanging hole 200a and can be hung or tied on a support, which can be but is not limited to a steel beam or a cable.
The rotating disc 20 is located in the accommodating space S, a pivot shaft 19 is disposed through the center of the rotating disc 20, and two ends of the pivot shaft 19 are respectively and fixedly connected to the first arm 12 and the second arm 14, so that the rotating disc 20 is pivoted to the bracket 10 through the pivot shaft 19, and thus can be rotatably located in the accommodating space S relative to the bracket 10. The turntable 20 includes a main body 22 and two normally open ratchet teeth 24, wherein the main body 22 has a containing portion 222 and a setting portion 224.
The receiving portion 222 is divided into a reduced diameter portion 222a recessed along the radial direction of the body 22 and an enlarged diameter portion 222b enlarged along the radial direction of the body 22 in the axial direction. The reduced diameter portion 222a of the accommodating portion 222 is connected to the enlarged diameter portion 222b of the accommodating portion 222 at one side edge in the axial direction, and the reduced diameter portion 222a and the enlarged diameter portion 222b of the accommodating portion 222 are integrally formed in this embodiment, but not limited thereto. The other side edge of the reduced diameter portion 222a of the accommodating portion 222 in the axial direction is detachably coupled to the installation portion 224, but in other practical applications, the accommodating portion 222 and the installation portion 224 may be integrally formed. In this embodiment, a steel cable 50 is wound around the outer periphery of the diameter-reduced portion 222a of the accommodating portion 222, and the steel cable 50 is limited between the diameter-expanded portion 222b of the accommodating portion 222 and the setting portion 224, and the free end thereof is exposed out of the housing 200 through the through hole 200b and can be pulled to drive the rotating disc 20 to rotate. The receiving portion 222 is not limited to being wound by the cable 50, but may be other flexible strip bodies, such as a cable or a safety belt.
The two normally open ratchet teeth 24 of the rotary disk 20 are pivotally disposed on the outer wall 224a of the setting portion 224 and respectively located on two opposite side portions of the outer wall 224 a. Each normally open ratchet 24 has a first abutting portion 242, each first abutting portion 242 is located at a tip end portion of each normally open ratchet 24, and a return spring 25 is connected to each normally open ratchet 24 at an end portion opposite to the first abutting portion 242. One end of each return spring 25 is connected to the normally open ratchet 24, and the other end is fixed to the outer wall 224a of the setting portion 224, and in this embodiment, is sleeved on a stud locked to the outer wall 224a to be fixed to the outer wall 224 a. The return spring 25 is used to maintain each normally open ratchet 24 at a first position P1, in other words, the normally open ratchet 24 can be maintained in the normally open state without contacting the braking device 30 without any external force. Referring to fig. 5 and 6, when the normally open ratchet 24 receives an external force above a predetermined value, the normally open ratchet 24 can pivot against the restoring force given by the restoring spring 25, so that the first abutting portion 242 can move from the first position P1 to a second position P2. The first position P1 is a greater distance from the center of the pivot axis 19 than the second position P2.
The braking device 30 is sleeved on the pivot shaft 19 and located between the first arm 12 and the setting portion 224. The brake 30 includes a ratchet plate 32, a center shaft plate 34 and a cover plate 36. The ratchet disc 32 has a plurality of ratchet teeth 322 on the periphery thereof, the tip of each ratchet tooth 322 forms a second abutting portion 322a, the distance between each second abutting portion 322a and the center of the pivot shaft 19 is fixed and is greater than the distance between the first abutting portion 242 and the center of the pivot shaft 19 when the first abutting portion 242 is located at the second position P2, that is, each second abutting portion 322a is located on the rotation path formed by the rotation of the rotary disc 20 when the first abutting portion 242 is located at the second position P2. The cover plate 36 has a through hole 36 a. The central shaft disc 34 has a convex portion 342, and the convex portion 342 is formed by extending outward from the disc surface of the central shaft disc 34 along the central axis thereof, and is inserted into the through hole 36a and fixed on the first support arm 12. A portion of the central hub 34 is located between the ratchet disc 32 and the cover disc 36, and the cover disc 36 is fixed on the ratchet disc 32, such that the two side disc surfaces of the central hub 34 are respectively in friction contact with the ratchet disc 32 and the cover disc 36, forming a friction speed reducer, such that the ratchet disc 32 and the cover disc 36 can rotate in friction relative to the fixed central hub 34.
The dust cover 40 includes a main cover 42 and two auxiliary covers 44, wherein a hole 42a is formed in the center of the main cover 42, and the two auxiliary covers 44 are connected to the periphery of the main cover 42 and located at two opposite side ends. The dust cap 40 is fixedly disposed on the outer wall 224a of the setting portion 224 and located between the setting portion 224 and the first arm 12, and the protrusion 342 penetrates through the hole 42a and is fixedly connected to the first arm 12. The dust-proof cover 40 and the setting portion 224 form a closed space a, the braking device 30 is located in the main cover 42, and the two normally open ratchets 24 are located in the two auxiliary covers 44, respectively. It should be noted that the outline shape of the hole 42a of the dust-proof cover 40 corresponds to the external outline shape of the protrusion 342, so as to prevent the gap formed between the hole 42a and the protrusion 342 from being too large and dust from entering the enclosed space a through the gap; alternatively, the tight fit between the hole 42a and the protrusion 342 is prevented from adversely affecting the rotation of the dust cap 40 relative to the protrusion 342.
Thus, with continued reference to figures 5 to 7, in use of the invention, the eye 17 on the bracket 10 is secured to the support and the exposed free end of the cable 50 is tied to the body of the aerial worker. When the worker normally works, the wire 50 is slowly pulled out of the housing 200, and the normally open ratchet 24 maintains the first abutting portion 242 at the first position P1 by the restoring force of the restoring spring 25. If the operator should fall from high altitude accidentally, the cable 50 will be pulled out of the housing 200 rapidly, and drives the rotating disc 20 to rotate at a predetermined speed, so that the gravity center O of each normally open ratchet 24 is thrown outwards by the centrifugal force generated by the rotation of the rotating disc 20, and the centrifugal force is greater than the restoring force of the restoring spring 25, and the first abutting portion 242 of each normally open ratchet 24 is pivotally swung from the first position P1 to the second position P2, whereby, the first contact portion 242 on the rotating turntable 20 can contact the second contact portion 322a of the brake device 30, the friction between the ratchet plate 32 and the cover plate 36 driven by the first abutting portion 242 and the central shaft plate 34 fixed on the first arm 12 causes the rotation speed of the rotary plate 20 to gradually slow down, thereby stopping the rotation of the rotary plate 20. In this embodiment, the variation of the length of the left arrow in fig. 6 and 7 represents the decrease of the rotation speed of the turntable 20. When the centrifugal force generated by the rotation of the dial 20 on the normally open ratchet 24 is smaller than the return force of the return spring 25, the first abutting portion 242 pivots from the second position P2 back to the first position P1. However, in other practical applications, the rotation of the turntable 20 may be stopped immediately when the first abutting portion 242 abuts against the second abutting portion 322 a.
In this embodiment, the number of the normally open ratchets 24 is two, but not limited to this, and the purpose of stopping the rotation of the rotary plate can be achieved by using one normally open ratchet in cooperation with the braking device, and even more than three normally open ratchets. For example, in another embodiment, the number of the normally open ratchet teeth is three, the distances between the normally open ratchet teeth and the pivot shaft are the same, and the distances between any two adjacent normally open ratchet teeth are all equal, so that the bonding strength between the normally open ratchet teeth and the ratchet wheel disc can be enhanced. In addition, the number of the auxiliary cover bodies of the dust-proof cover in the embodiment is also increased to three, and each auxiliary cover body covers one normally-open ratchet, so that the dust-proof purpose is achieved. Therefore, the normally open ratchet is positively correlated with the number of the auxiliary cover bodies, and the design of matching the main cover body with the auxiliary cover body instead of the integral dustproof cover aims to save the material cost for producing the dustproof cover.
In conclusion, the design that the dustproof cover covers the braking device and the normally open ratchets avoids external dust from influencing the anti-falling mechanism of the anti-falling device, and the use safety of a product is maintained.
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.
Description of the reference numerals
[ invention ]
1: falling protector
100: falling protector body
10: support frame
12: first support arm
14: second support arm
16: top board
17: hanging ring
18: connecting rod
19: pivotal shaft
20: rotary disc
22: body
222: receiving part
222 a: reduced diameter portion
222 b: diameter expanding part
224: setting part
224 a: outer wall
24: normally open ratchet
242: first contact part
25: spring
30: brake device
32: ratchet wheel disc
322: ratchet tooth
322 a: second abutting part
34: central shaft disc
342: convex part
36: covering plate
36 a: through hole
40: dust-proof cover
42: main cover body
42 a: hole(s)
44: auxiliary cover body
50: steel cable
200: outer casing
201: side casing
200 a: hanging hole
200 b: through hole
O: center of gravity
A: closed space
S: containing space
P1: first position
P2: second position
Claims (4)
1. A fall arrester comprising:
a bracket having a first arm and a second arm;
the rotating disc is pivoted on the bracket and is positioned between the two support arms; the rotary disc comprises a body and at least one normally open ratchet, wherein the body is provided with a containing part for winding a flexible strip body thereon and a setting part; the normally open ratchet is provided with a first abutting part and is pivoted on the setting part, and when the turntable 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 is fixedly combined on the first support arm by the convex part, so that the braking device is positioned between the first support arm and the setting part; the braking device is also provided with at least one second abutting part which can abut against the first abutting part along a rotating path formed by the rotation of the turntable when the first abutting part is positioned at the second position so as to stop the rotation of the turntable;
the dustproof cover is fixedly arranged on the setting part and is positioned between the setting part and the first supporting arm; a closed space is formed between the dustproof cover and the setting part, so that the at least one normally open ratchet and the braking device are positioned in the closed space; the dust cover is provided with a hole, and the convex part penetrates out of the hole.
2. The fall arrester of claim 1 wherein the at least one normally open ratchet is two in number; the two normally open ratchets are respectively arranged on the outer wall of the setting part and are positioned on the two opposite side parts.
3. The fall arrester of claim 2, wherein the dust cover comprises a main cover and two auxiliary covers, and the two auxiliary covers are connected to the periphery of the main cover and located at two opposite side ends; wherein the braking device is positioned in the main cover body, and the two normally open ratchets are positioned in the two auxiliary cover bodies.
4. The fall arrester of claim 1 wherein the aperture of the dust cover has a profile shape corresponding to an outer profile shape of the boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011060224.3A CN114306974A (en) | 2020-09-30 | 2020-09-30 | Falling protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011060224.3A CN114306974A (en) | 2020-09-30 | 2020-09-30 | Falling protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114306974A true CN114306974A (en) | 2022-04-12 |
Family
ID=81011046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011060224.3A Pending CN114306974A (en) | 2020-09-30 | 2020-09-30 | Falling protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114306974A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114733100A (en) * | 2021-01-07 | 2022-07-12 | 振锋企业股份有限公司 | Falling protector |
| US11628319B2 (en) | 2021-02-26 | 2023-04-18 | Yoke Industrial Corp. | Fall arrest device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1498226A (en) * | 1975-06-16 | 1978-01-18 | Matsumoto Kiko Co Ltd | Safety lowering apparatus |
| CN201862170U (en) * | 2010-11-26 | 2011-06-15 | 彰茂企业股份有限公司 | Braking device of falling protector |
| CN206334225U (en) * | 2016-12-12 | 2017-07-18 | 彰茂企业股份有限公司 | Anti-dropping safety device |
| CN107826077A (en) * | 2017-12-11 | 2018-03-23 | 山东交通学院 | A kind of tight receiving apparatus of safety belt |
| CN209060406U (en) * | 2017-09-20 | 2019-07-05 | 振锋企业股份有限公司 | falling protector |
| CN110585613A (en) * | 2019-08-06 | 2019-12-20 | 厦门信智创联科技有限公司 | High-rise escape device |
| CN110869089A (en) * | 2017-07-13 | 2020-03-06 | 3M创新有限公司 | Fall protection device comprising a friction brake |
| CN211357505U (en) * | 2019-10-07 | 2020-08-28 | 南京林业大学 | Speed difference anti-falling device based on integral drum wheel structure |
| CN213912040U (en) * | 2020-09-30 | 2021-08-10 | 振锋企业股份有限公司 | Falling protector |
-
2020
- 2020-09-30 CN CN202011060224.3A patent/CN114306974A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1498226A (en) * | 1975-06-16 | 1978-01-18 | Matsumoto Kiko Co Ltd | Safety lowering apparatus |
| CN201862170U (en) * | 2010-11-26 | 2011-06-15 | 彰茂企业股份有限公司 | Braking device of falling protector |
| CN206334225U (en) * | 2016-12-12 | 2017-07-18 | 彰茂企业股份有限公司 | Anti-dropping safety device |
| CN110869089A (en) * | 2017-07-13 | 2020-03-06 | 3M创新有限公司 | Fall protection device comprising a friction brake |
| CN209060406U (en) * | 2017-09-20 | 2019-07-05 | 振锋企业股份有限公司 | falling protector |
| CN107826077A (en) * | 2017-12-11 | 2018-03-23 | 山东交通学院 | A kind of tight receiving apparatus of safety belt |
| CN110585613A (en) * | 2019-08-06 | 2019-12-20 | 厦门信智创联科技有限公司 | High-rise escape device |
| CN211357505U (en) * | 2019-10-07 | 2020-08-28 | 南京林业大学 | Speed difference anti-falling device based on integral drum wheel structure |
| CN213912040U (en) * | 2020-09-30 | 2021-08-10 | 振锋企业股份有限公司 | Falling protector |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114733100A (en) * | 2021-01-07 | 2022-07-12 | 振锋企业股份有限公司 | Falling protector |
| US11628319B2 (en) | 2021-02-26 | 2023-04-18 | Yoke Industrial Corp. | Fall arrest device |
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Legal Events
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220412 |
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| RJ01 | Rejection of invention patent application after publication |