CN106836781B - Swing arm type anti-falling device - Google Patents
Swing arm type anti-falling device Download PDFInfo
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- CN106836781B CN106836781B CN201710211229.3A CN201710211229A CN106836781B CN 106836781 B CN106836781 B CN 106836781B CN 201710211229 A CN201710211229 A CN 201710211229A CN 106836781 B CN106836781 B CN 106836781B
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- swing arm
- arm
- supporting swing
- rotating shaft
- supporting
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/001—Safety or protective measures against falling down relating to scaffoldings
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Invalid Beds And Related Equipment (AREA)
- Emergency Lowering Means (AREA)
Abstract
The invention relates to the field of falling prevention devices, in particular to a swing arm type falling prevention device, which comprises a base, a first rotating shaft arranged on the base, a first supporting swing arm rotatably arranged on the first rotating shaft, a second rotating shaft arranged on the first supporting swing arm, a second supporting swing arm rotatably arranged on the second rotating shaft, and a stop block arranged below the first supporting swing arm and used for limiting rotation to a lower rotation limit position, wherein the first rotating shaft and the second rotating shaft are parallel, and the rotating surface of the first supporting swing arm and the rotating surface of the second supporting swing arm are in the same vertical plane; the second support swing arm is provided with a trigger arm, an anti-falling stop block and a counterweight arm, wherein the trigger arm, the anti-falling stop block and the counterweight arm are positioned in the rotation surface of the second support swing arm, and the trigger arm and the counterweight arm are respectively positioned at two opposite sides of the second rotating shaft. The device can automatically avoid the movable frame in the ascending or descending process of the movable frame, and returns to the original position according to the gravity of the device, and the movable frame can play a role in preventing falling when falling down.
Description
Technical Field
The invention relates to the field of anti-falling devices, in particular to a device for preventing a lifting structure from suddenly falling.
Background
Since the 90 s, the building structure system of China has been greatly developed, high-rise buildings, super high-rise buildings and large public buildings are greatly built, meanwhile, in many areas, building safety accidents also frequently occur, and group death and group injury are caused, in all building safety death accidents, the falling of a scaffold overhead accounts for the majority of building construction accidents, and the falling is directly related to scaffold falling prevention device mechanisms in the building construction. At present, the anti-falling device for attaching the lifting scaffold equipment and the lifter used in the building industry has potential safety hazards due to the fact that the structure is complex, maintenance cost is increased, equipment failure rate is increased.
Disclosure of Invention
In order to solve the problems, the invention provides a swing arm type anti-falling device which can improve the construction safety of a lifting structure.
The invention realizes the aim, and adopts the technical scheme that:
the swing arm type anti-falling device comprises a base, a first rotating shaft arranged on the base, a first supporting swing arm rotatably arranged on the first rotating shaft, a second rotating shaft arranged on the first supporting swing arm, a second supporting swing arm rotatably arranged on the second rotating shaft, and a stop block arranged below the first supporting swing arm and used for limiting rotation to a downward rotation limit position, wherein the first rotating shaft and the second rotating shaft are parallel, and the rotating surface of the first supporting swing arm and the rotating surface of the second supporting swing arm are in the same vertical plane;
the second supporting swing arm is provided with a trigger arm, an anti-falling stop block and a counterweight arm, wherein the trigger arm, the anti-falling stop block and the counterweight arm are positioned in the rotation surface of the second supporting swing arm and are positioned on two opposite sides of the second rotating shaft respectively.
Preferably, the included angle between the anti-falling stop block and the trigger arm is an acute angle.
Preferably, the top surface of the stop is planar, and the lower surface of the first support swing arm is planar.
Preferably, a first limiting block is arranged at the position, close to the second supporting swing arm, of the first supporting swing arm, and when the top surface of the anti-falling stop block is horizontal, the trigger arm is abutted against the first limiting block.
Preferably, the concave arc-shaped surface of the upper surface of the anti-falling stop block.
Preferably, the lower side surface of the anti-falling stop block is an arc surface.
Preferably, the two side surfaces of the base are respectively provided with a first mounting arm, and the inner side surface of each mounting arm is respectively provided with two guide rods for guiding the vertical rods.
The beneficial effects of using the invention are as follows:
this anti-falling device can be when the lift scaffold falls suddenly through the setting of trigger arm, and the horizontal pole bumps into movable cross bar for anti-falling dog overcomes the counter weight arm and rotates, makes anti-falling dog rotate to the horizontality, and first support swing arm butt is at the bearing piece, makes this device can support the horizontal pole. The cross bar can move up and down under the general state of the device, and is not limited by the trigger arm. The device has low production cost, stable and reliable structure and low later maintenance cost.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is a schematic view of the present invention in combination with a lifting scaffold.
Fig. 3 is a state diagram of the lifting process of the lifting scaffold of the invention.
Fig. 4 is another state diagram of the lifting process of the lifting scaffold according to the invention.
Fig. 5 is a state diagram of the falling process of the lifting scaffold.
Fig. 6 is another state diagram of the falling process of the lifting scaffold of the invention.
Fig. 7 to 10 are schematic views showing the motion state of the second supporting swing arm in the descending process of the lifting scaffold in the invention.
The reference numerals include:
100-base 110-first support swing arm 111-first stopper
120-second support swing arm 121-trigger arm 122-anti-falling stop
123-counterweight arm 124-second stopper 130-first rotation shaft
140-second shaft 150-stop 160-mounting plate
170-first mounting arm 171-guide wheel 210-vertical bar
220-cross bar
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
The scaffold is taken as an example of the embodiment, the device comprises but is not limited to the scaffold, and the device is suitable for various lifting structures, such as a lifting platform, a lifting elevator and other devices.
As shown in fig. 1 to 6, the present embodiment provides a swing arm type fall arrest device, the lifting scaffold includes a vertical bar 210 and a cross bar 220, the swing arm type fall arrest device includes a base 100, a first rotation shaft 130 provided at the base 100, a first support swing arm 110 rotatably mounted on the first rotation shaft 130, a second rotation shaft 140 provided at the first support swing arm 110, a second support swing arm 120 rotatably mounted on the second rotation shaft 140, and a stopper 150 provided below the first support swing arm 110 for limiting a rotation to a downward rotation limit position, the first rotation shaft 130 and the second rotation shaft 140 are parallel, and a rotation surface of the first support swing arm 110 and a rotation surface of the second support swing arm 120 are in the same vertical plane; the second supporting swing arm 120 is provided with a trigger arm 121, an anti-falling stop block 122 and a counterweight arm 123 which are positioned in the rotation surface of the second supporting swing arm 120 and extend, the trigger arm 121 and the counterweight arm 123 are respectively positioned at two opposite sides of the second rotation shaft 140, when the lifting scaffold falls down, the cross bar 220 drives the second supporting swing arm 120 to rotate downwards, and the top surface of the anti-falling stop block 122 is horizontal and supports the cross bar 220.
Specifically, the back of the first supporting swing arm 110 of the device is mounted on the surface of a building or a stable structure through a mounting plate 160, the front of the first supporting swing arm 110 is of an open structure, the base 100 is provided with a first rotating shaft 130, the first supporting swing arm 110 is provided with a through hole, the first supporting swing arm 110 is rotatably connected with the base 100 in a mode of sleeving the through hole on the first rotating shaft 130, a second rotating shaft 140 is arranged on one side, close to the opening, of the first supporting swing arm 110, and the second supporting swing arm 120 is rotatably connected with the first supporting swing arm 110 similar to the first rotating shaft 130. In this embodiment, the first rotation shaft 130 and the second rotation shaft 140 are disposed in parallel, so that the rotation surfaces of the first support swing arm 110 and the second support swing arm 120 are in the same space. The top surface of the stopper 150 in the embodiment is a horizontal surface, and when the first supporting swing arm 110 rotates downward to contact the stopper 150, the contact surface between the first supporting swing arm 110 and the stopper 150 is also a plane surface, so that the stopper 150 provides a relatively stable supporting capability for the first supporting swing arm 110.
The trigger arm 121 and the counterweight arm 123 in the second supporting swing arm 120 in this embodiment are located at two opposite sides of the second rotating shaft 140, and the anti-falling stop 122 is disposed at the upper side between the trigger arm 121 and the counterweight arm 123, and in this embodiment, the included angle between the anti-falling stop 122 and the trigger arm 121 is an acute angle.
As shown in fig. 3 and 4, fig. 3 and 4 show the operation of the present apparatus during the lifting of the lifting scaffold. During the lifting of the lifting scaffold, the weight of the counterweight arm 123 is greater than that of the trigger arm 121, and in a normal state, the trigger arm 121 is located on the travel path of the cross bar 220. When the cross bar 220 walks upwards, the second limiting block 124 on the back of the second supporting swing arm 120 contacts the first limiting block 111 on the first supporting swing arm 110, so that the first supporting swing arm 110 can limit the rotation position of the second supporting swing arm 120, when the cross bar 220 walks further upwards, the first supporting swing arm 110 and the second supporting swing arm 120 are rigidly connected, and the first supporting swing arm 110 and the second supporting swing arm 120 integrally rotate upwards around the first rotating shaft 130. After the cross bar 220 passes over the trigger arm 121, the first support swing arm 110 and the second support swing arm 120 automatically drop down according to their own weight, and return to a normal state.
As shown in fig. 5, during the lower speed downward movement of the cross bar 220, the cross bar 220 drives the trigger arm 121 to rotate, the trigger arm 121 rotates downward against the weight of the weight arm 123, and after the cross bar 220 passes over the trigger arm 121, the weight arm 123 tilts the trigger arm 121 again according to its own weight. Figures 7-10 detail the course of action of the second support swing arm 120 during slow lowering of the scaffold. It can be seen that the first support swing arm 110 is inactive during this process.
As shown in fig. 5 and 6, during the faster downward movement of the cross bar 220, the trigger arm 121 is impacted at a faster speed, the trigger arm 121 overcomes the gravity of the counterweight arm 123, so that the second support swing arm 120 rotates around the second rotation shaft 140, the anti-falling stop 122 rotates to a horizontal state, the trigger arm 121 in the second support swing arm 120 abuts against the first support swing arm 110, so that the second support swing arm 120 is rigidly connected to the rotation shaft, and the first support swing arm 110 is rigidly connected to the stop 150. At this time, the lifting scaffold continues to fall, and the upper cross bar 220 is supported on the upper surface of the anti-falling block 122, so as to realize the anti-falling function.
The angle between the fall arrest block 122 and the trigger arm 121 is an acute angle. The rotation angle of the anti-falling block 122 is small, so that the anti-falling block 122 can be quickly moved to a horizontal state.
The upper surface of the fall arrest block 122 has a concave arc surface for receiving the crossbar 220. So that the cross bar 220 is more firmly positioned on the upper surface of the fall arrest block 122. The underside surface of the fall arrest block 122 is an arc surface so that the cross bar 220 passes over the trigger arm 121 more smoothly.
The length of the trigger arm 121 is matched with the linear distance from the axis of the second rotating shaft 140 to the moving surface of the cross rod 220, so that the cross rod 220 can easily pass over the trigger arm 121, and the function of detecting the rapid falling of the cross rod 220 can be achieved.
The two sides of the base 100 are respectively provided with a first mounting arm 170, the inner side of each mounting arm is provided with two guide rods for guiding the vertical rods 210, and the two guide wheels 171 of each trigger arm 121 limit one vertical rod 210, so that the two groups of guide wheels 171 respectively guide the two vertical rods 210 of the lifting scaffold.
The foregoing is merely exemplary of the present invention, and many variations may be made in the specific embodiments and application scope of the invention by those skilled in the art based on the spirit of the invention, as long as the variations do not depart from the gist of the invention.
Claims (5)
1. The utility model provides a swing arm formula anti-falling device which characterized in that: the swing arm type anti-falling device comprises a base, a first rotating shaft arranged on the base, a first supporting swing arm rotatably arranged on the first rotating shaft, a second rotating shaft arranged on the first supporting swing arm, a second supporting swing arm rotatably arranged on the second rotating shaft, and a stop block arranged below the first supporting swing arm and used for limiting rotation to a downward rotation limit position, wherein the first rotating shaft and the second rotating shaft are parallel, and the rotating surface of the first supporting swing arm and the rotating surface of the second supporting swing arm are in the same vertical plane;
the second supporting swing arm is provided with a trigger arm, an anti-falling stop block and a counterweight arm which are positioned in the rotation surface of the second supporting swing arm and extend, and the trigger arm and the counterweight arm are respectively positioned at two opposite sides of the second rotating shaft;
the second supporting swing arm is rotatably connected with the first supporting swing arm;
a first limiting block is arranged at the position, close to the second supporting swing arm, of the first supporting swing arm, and when the top surface of the anti-falling stop block is horizontal, the trigger arm is abutted against the first limiting block;
the lifting scaffold comprises a vertical rod and a transverse rod, the trigger arm is positioned on the travel of the transverse rod,
when the cross bar walks upwards, a second limiting block on the back surface of the second supporting swing arm contacts with a first limiting block on the first supporting swing arm, so that the first supporting swing arm can limit the rotation position of the second supporting swing arm, and when the cross bar walks further upwards, the first supporting swing arm is rigidly connected with the second supporting swing arm, and the first supporting swing arm and the second supporting swing arm integrally rotate upwards around a first rotating shaft; after the cross bar passes over the trigger arm, the first supporting swing arm and the second supporting swing arm automatically fall down according to self gravity and return to a general state;
in the process that the cross rod moves downwards at a low speed, the cross rod drives the trigger arm to rotate, the trigger arm overcomes the weight of the counterweight arm to rotate downwards, and after the cross rod passes over the trigger arm, the counterweight arm lifts the trigger arm again according to the weight of the counterweight arm;
in the process of rapidly moving the cross rod downwards, the trigger arm rapidly impacts the gravity of the counterweight arm, so that the second supporting swing arm rotates around the second rotating shaft, the anti-falling stop dog rotates to be in a horizontal state, the trigger arm in the second supporting swing arm is propped against the first supporting swing arm, the second supporting swing arm is rigidly connected with the rotating shaft, and meanwhile, the first supporting swing arm is rigidly connected with the stop dog; the lifting scaffold continuously falls down, and the cross bar above the lifting scaffold is supported on the upper surface of the anti-falling stop block;
the base both sides face all has first installation arm, every installation arm medial surface all is equipped with two guide bars that are used for guiding the montant.
2. The swing arm type fall arrest device according to claim 1, wherein: the included angle between the anti-falling stop block and the trigger arm is an acute angle.
3. The swing arm type fall arrest device according to claim 1, wherein: the top surface of the stop block is a plane, and the lower surface of the first supporting swing arm is a plane.
4. The swing arm type fall arrest device according to claim 1, wherein: the upper side surface of the anti-falling stop block is provided with a concave arc-shaped surface.
5. The swing arm type fall arrest device according to claim 1, wherein: the lower side surface of the anti-falling stop block is an arc surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710211229.3A CN106836781B (en) | 2017-03-31 | 2017-03-31 | Swing arm type anti-falling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710211229.3A CN106836781B (en) | 2017-03-31 | 2017-03-31 | Swing arm type anti-falling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106836781A CN106836781A (en) | 2017-06-13 |
| CN106836781B true CN106836781B (en) | 2023-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710211229.3A Active CN106836781B (en) | 2017-03-31 | 2017-03-31 | Swing arm type anti-falling device |
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| Country | Link |
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| CN (1) | CN106836781B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355069A (en) * | 2017-08-11 | 2017-11-17 | 顾志勇 | A kind of climbing frame falling proof mechanism and the climbing frame falling proof seat in the plane lock based on the mechanism |
| CN109372244B (en) * | 2018-11-23 | 2024-05-28 | 成都嘉泽正达科技有限公司 | Scaffold anti-falling device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2011986B (en) * | 1978-01-05 | 1982-04-28 | Simmonds E C | Scaffolding system |
| CN102383587A (en) * | 2011-11-28 | 2012-03-21 | 江苏天任建设有限公司 | Kinetic-energy-free falling-preventing safety lock for scaffold |
| CN106401163A (en) * | 2015-07-31 | 2017-02-15 | 江苏万元模架工程有限公司 | Pawl guide rail-type anti-falling wall-attached device |
| CN205591532U (en) * | 2016-04-28 | 2016-09-21 | 中建六局建设发展有限公司 | A anti -falling device for inserted lift scaffold |
| CN206769357U (en) * | 2017-03-31 | 2017-12-19 | 深圳市中升建科科技发展有限公司 | A kind of swing arm anti-fall device |
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2017
- 2017-03-31 CN CN201710211229.3A patent/CN106836781B/en active Active
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| Publication number | Publication date |
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| CN106836781A (en) | 2017-06-13 |
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