CN217151161U

CN217151161U - Anti-falling safety device for scaffold

Info

Publication number: CN217151161U
Application number: CN202220403863.3U
Authority: CN
Inventors: 张睿
Original assignee: Hubei Shansi Engineering Technology Co ltd
Current assignee: Hubei Shansi Engineering Technology Co ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-08-09
Anticipated expiration: 2032-02-28

Abstract

The utility model relates to a scaffold anti-falling safety device, which comprises a suspender, and the anti-falling safety device also comprises a main bracket which is fixedly connected with a lifting basket of a lifting scaffold and a connecting bracket which is matched with the suspender; the connecting bracket is fixedly arranged on the side edge of the main bracket, an assembling groove for penetrating the suspender is formed in the connecting bracket, and the suspender penetrates through the assembling groove; the anti-falling safety device also comprises a locking mechanism used for locking the connecting bracket and the suspender, and a locking control mechanism used for controlling the locking mechanism to lock or unlock the connecting bracket and the suspender. The utility model discloses can be comparatively sensitive when taking place the accident of falling, through the mode braking of the dead jib of lock, effectively avoid the accident of falling and the accident of overturning that falls, greatly improved the security of scaffold frame.

Description

Anti-falling safety device for scaffold

Technical Field

The utility model belongs to the technical field of architectural equipment, in particular to anti-falling safety device of scaffold.

Background

The attached lifting scaffold is a scaffold widely applied to high-rise building construction at present, and is widely accepted due to safety and economy. The anti-falling device of the attached lifting scaffold is an important structure for ensuring the safety of the attached lifting scaffold, and the braking distance is the core of the safety guarantee of the attached lifting scaffold. The anti-falling device of the attached lifting scaffold is generally of a mechanical non-automatic resetting structure, and is required to bear the impact generated by falling of a scaffold body and meet the requirement of relevant standard on the braking distance. The anti-falling device of the prior attached lifting scaffold mainly comprises a swinging pin type, a steel lifting rod type and a rotating wheel type. The existing application is widely divided into a swinging needle type device and a rotating wheel type device, and the swinging needle type device and the rotating wheel type device are simple in structure, convenient to install and extremely low in cost.

According to the requirements of JGJ 202-2010 construction tool type foot rest safety technical specification, the braking distance needs to be controlled within 80 mm. However, the braking distance of the anti-falling safety device of the existing scaffold is generally 75-100 mm, and certain potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to an at least technical problem who exists among the prior art, provide a safety device that falls is prevented to scaffold frame, can be comparatively sensitive when taking place the accident of falling, through the mode braking of locking the jib, effectively avoid the accident of falling and the accident of overturning that falls, greatly improved the security of scaffold frame.

The utility model provides an above-mentioned technical problem's technical scheme as follows:

a falling-prevention safety device for a scaffold comprises a suspender, a main bracket and a connecting bracket, wherein the main bracket is fixedly connected with a lifting basket of a lifting scaffold; the connecting bracket is fixedly arranged on the side edge of the main bracket, an assembling groove for penetrating the suspender is formed in the connecting bracket, and the suspender penetrates through the assembling groove; the anti-falling safety device also comprises a locking mechanism for locking the connecting bracket and the suspender, and a locking control mechanism for controlling the locking mechanism to lock or unlock the connecting bracket and the suspender.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Furthermore, the locking mechanism is an internal-contracting brake piece mechanism, and the locking control mechanism is a hydraulic cylinder for controlling the internal-contracting brake piece of the internal-contracting brake piece mechanism to cling to or loosen the suspender.

Furthermore, a cavity is arranged in the main support, a pulley block formed by a plurality of pulleys is arranged in the cavity, the pulley block is used for winding a lifting steel wire rope discharged by an electric hoist of the lifting scaffold, and the pulley block at least comprises a movable pulley; the locking mechanism is a roller type braking mechanism and comprises a lever assembly, the lever assembly is rotatably connected to the connecting support through a rotating shaft, one end of the lever assembly, which is positioned on the suspender, is a movable end, the other end of the lever assembly is a prying end, the movable end is provided with a locking roller, and the prying end is provided with a connecting rod; the locking control mechanism comprises an outer shell and a sliding block, the sliding block is connected with the outer shell through a return spring, a sliding groove is formed in one side, located on the sliding block, of the main support, the sliding block is connected with the sliding groove in a sliding mode, the connecting rod is connected with the sliding block in a rotating mode, and a wheel shaft of the movable pulley is installed on the sliding block; the arrangement position of the lever assembly ensures that the lifting steel wire rope tightly pulls the movable pulley to drive the lever assembly, the locking roller and the suspender are in a separated state, the movable pulley is loosened by the lifting steel wire rope, the reset spring pushes the sliding block to reset, and after the lever assembly is driven, the locking roller and the suspender are tightly attached and locked.

Preferably, two pulleys are arranged and are movable pulleys; the locking mechanism and the locking control mechanism are provided with two sets.

Preferably, the connecting bracket is provided with a locking roller limiting sliding groove matched with the running track of the locking roller.

Preferably, the sliding block is in sliding connection with the sliding groove through a dovetail groove.

Furthermore, the suspender is arranged close to the outer wall of the building, and a connecting assembly is arranged between the suspender and the outer wall of the building for connection.

Furthermore, a connecting plate is fixedly installed on the outer side of the main support and is used for being fixedly connected with a lifting basket of the lifting scaffold.

The utility model has the advantages that: the lifting basket of the lifting scaffold can be effectively prevented from being overturned when falling through the arrangement of the hanging rods and the connecting bracket, so that the safety is effectively improved; the utility model is provided with the locking mechanism and the locking control mechanism, adopts the locking mode of locking the suspender, has high sensitivity, can effectively reduce the braking distance when falling, and can control the braking distance within 100 mm; the utility model discloses simple structure, it is convenient to load and unload, and the cost is also lower.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural view of the locking portion of the present invention;

FIG. 3 is a schematic structural view of one embodiment of the locking mechanism of the present invention;

FIG. 4 is a schematic cross-sectional view of the locking control mechanism of the present invention;

FIG. 5 is a schematic structural diagram of another embodiment of the present invention;

in the figure:

1. the device comprises a main support 11, a pulley sliding groove, 2, a connecting plate, 3, a pulley, 4, a lifting steel wire rope, 5, a connecting support, 6, a suspender, 7, a locking mechanism, 71, a lever assembly, 72, a rotating shaft, 73, a locking roller, 74, a connecting rod, 8, a locking control mechanism, 81, an outer shell, 82, a reset spring, 83, a sliding block, 9 and a locking roller limiting sliding groove.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1, the utility model relates to a scaffold frame safety device of preventing falling, including jib 6, prevent falling safety device still including be used for with lifting scaffold's lifting basket fixed connection's main support 1 and be used for with jib 6 complex linking bridge 5. The connecting support 5 is fixedly installed on the side edge of the main support 1, an assembling groove for penetrating the suspender 6 is formed in the connecting support 5, and the suspender 6 penetrates through the assembling groove.

The structure of the part is similar to that of the prior steel boom type anti-falling device. However, in the conventional steel boom type anti-falling device, a brake kit surrounding the boom 6 is arranged on the connecting bracket 2, a rough friction surface is arranged inside the steel boom type anti-falling device, and a gap between the brake kit and the boom 6 is set to be extremely small. Therefore, once the lifting steel wire is broken or the lifting device fails, the lifting basket loses the tensile force of the lifting steel wire and drops at the moment of falling, the lifting basket can displace towards the building under the limiting action of the guide rail and the cross beam, the braking sleeve can be tightly attached to the suspender 6, and then friction braking is performed. Such structural design is comparatively ingenious, but when the crossbeam because of the too big fracture of power of falling, perhaps the guide deviate from the condition such as guide rail and take place, the structure of this kind of passive braking can make braking distance can not control.

In this embodiment, the fall protection safety device further comprises a locking mechanism 7 for locking the connecting bracket 5 and the boom 6, and a locking control mechanism 8 for controlling the locking mechanism 7 to lock or unlock the connecting bracket 5 and the boom 6. After the control mechanism 8 and the locking mechanism 7 are additionally arranged, the mode of passive braking is changed into active braking, the sensitivity can be greatly improved, the braking distance is shortened, the falling force is effectively buffered, the occurrence of serious accidents such as beam fracture is effectively avoided, and the safety performance is greatly improved.

In the above embodiment, the present invention can be further modified as follows. In a modified scheme, the suspension rod 6 is arranged close to the outer wall of the building, and a connecting assembly is arranged between the suspension rod 6 and the outer wall of the building for connection.

By adopting the improved scheme, the suspender 6 can be more stable, and the safety is further enhanced.

In the above embodiment, the present invention can be further modified as follows. In the improvement scheme, a connecting plate 2 is fixedly installed on the outer side of the main support 1 and is used for being fixedly connected with a lifting basket of a lifting scaffold.

By adopting the improved scheme, the area of the assembling surface of the main support 1 and the lifting basket can be effectively increased, so that the fixing is firmer, and the supporting column lifting basket is effectively supported when falling.

The lock mechanism 7 of the present embodiment may be a push-out type of brake pad mechanism, and the lock control mechanism 8 may be an electrically driven hydraulic cylinder, air cylinder, or electric push rod. The control can adopt a sensor control mode, a speed sensor or a steel wire rope tension sensor is installed, and the locking control mechanism 8 is triggered to start when the falling speed exceeds a certain limit or the tension is lower than a certain limit. All components may be commercially available components.

As shown in fig. 1 to 4, the present invention is still another embodiment, which is similar to the first embodiment in structure and differs in the specific structure of the lock mechanism 7 and the lock control mechanism 8.

In the embodiment, a cavity is arranged in the main support 1, a pulley block formed by a plurality of pulleys 3 is arranged in the cavity, and the pulley block is used for winding a lifting steel wire rope 4 discharged by an electric hoist of the lifting scaffold. The pulley block at least comprises a movable pulley.

In this embodiment, the locking mechanism 7 is a roller-type braking mechanism, and includes a lever assembly 71, the lever assembly 71 is rotatably connected to the connecting bracket 5 through a rotating shaft 72, one end of the lever assembly 71 located on the suspension rod 6 is a movable end, and the other end is a prying end. The movable end is provided with a locking roller 73, and the prying end is provided with a connecting rod 74. By shifting the connecting rod 74, the lever assembly 71 can rotate along the rotating shaft 72, so as to move the locking roller 73 at the movable end.

In the present embodiment, the lock control mechanism 8 includes an outer case 81 and a slider 83, and the slider 83 is connected to the outer case 81 by a return spring 82. The outer housing 81 may be fixedly mounted on the main bracket 1 or the connecting bracket 5. The main support 1 is provided with a sliding groove 11 at one side of the sliding block 83, the sliding block 83 is connected with the sliding groove 11 in a sliding manner, the connecting rod 74 is connected with the sliding block 83 in a rotating manner, and the axle of the movable pulley is installed on the sliding block 83. Due to the structural design, when the lifting steel wire rope 4 works normally, the pulling force is normal and stable, the lifting steel wire rope 4 can pull the movable pulley to move upwards, so that the sliding block 83 moves upwards to the top end of the sliding groove 11 along the sliding groove 11 to drive the connecting rod 74, the lever assembly 71 is pulled, and the locking roller 73 moves downwards and is recovered; when the lifting steel wire rope 4 works abnormally, the pulling force is lost, and under the reset action of the reset spring 82, the movable pulley moves downwards, so that the sliding block 83 moves downwards along the sliding groove 11, the connecting rod 74 is driven, the lever assembly 71 is shifted, and the locking roller 73 moves upwards and extends forwards. The locking roller 73 can be triggered to extend forwards or retract according to the tension of the lifting steel wire rope 4 through the structural design, and the locking mechanism 7 can be controlled.

In this embodiment, the arrangement position of the lever assembly 71 ensures that the locking roller 73 and the boom 5 are separated after the lifting steel wire rope 4 tightly pulls the movable pulley to drive the lever assembly 71; and the lifting steel wire rope 4 loosens the movable pulley, the return spring 82 pushes the slide block 83 to return, and after the lever assembly 71 is driven, the locking roller 73 is tightly locked with the suspender 6. This arrangement enables emergency braking in the event of a fall.

The locking operation is controlled by adopting a mechanical structure, the locking operation is triggered by the tensile force and the elastic force of the spring, the locking device is extremely sensitive, the braking distance can be shortened to be less than 60mm, and the requirement of the prior JGJ 202-plus 2010 construction tool type foot rest safety technical specification is far exceeded.

In the above embodiment, the present invention can be further modified as follows. In a modified scheme, the connecting bracket 5 is provided with a locking roller limiting chute 9 matched with the running track of the locking roller 73.

After the limiting groove is configured, the structure and the operation of the locking mechanism 7 can be more stable, and the risk of faults caused by overlarge stress is effectively avoided.

In the above embodiment, the present invention can be further modified as follows. In a modified version, the sliding block 83 is slidably connected with the sliding groove 11 through a dovetail groove.

The dovetail groove can be used for enabling the connection between the sliding block 83 and the sliding groove 11 to be more stable, the precision is further improved, and the position deviation when the sliding block falls is avoided.

As shown in fig. 5, the present invention has a third embodiment, which is similar to the second embodiment in structure, and differs in the number of the locking mechanisms 7 and the locking control mechanisms 8.

In the present embodiment, two pulleys 3 are provided, and both are movable pulleys. Two sets of locking mechanisms 7 and locking control mechanisms 8 are arranged.

The two sets of movable pulleys, the locking mechanism 7 and the locking control mechanism 8 of the present embodiment may be arranged symmetrically, and two suspenders 6 and two connecting brackets 5 may be prefabricated and matched. Can make the structure more firm like this, can further cushion down the power of weighing down, further promote the security.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A falling-prevention safety device for a scaffold comprises a suspender (6), and is characterized by also comprising a main bracket (1) fixedly connected with a lifting basket of a lifting scaffold and a connecting bracket (5) matched with the suspender (6); the connecting support (5) is fixedly arranged on the side edge of the main support (1), an assembling groove penetrating through the suspender (6) is formed in the connecting support (5), and the suspender (6) penetrates through the assembling groove; the anti-falling safety device further comprises a locking mechanism (7) used for locking the connecting bracket (5) and the suspension rod (6), and a locking control mechanism (8) used for controlling the locking mechanism (7) to lock or unlock the connecting bracket (5) and the suspension rod (6).

2. A scaffold fall protection safety device as claimed in claim 1, wherein: the locking mechanism (7) is a brake sheet mechanism, and the locking control mechanism (8) is a hydraulic cylinder for controlling the brake sheet of the brake sheet mechanism to be tightly attached to or loosened from the suspender (6).

3. A scaffold fall protection safety device as claimed in claim 1, wherein: a cavity is arranged in the main support (1), a pulley block formed by a plurality of pulleys (3) is arranged in the cavity, the pulley block is used for winding a lifting steel wire rope (4) discharged by an electric hoist of a lifting scaffold, and the pulley block at least comprises a movable pulley; the locking mechanism (7) is a roller type braking mechanism and comprises a lever assembly (71), the lever assembly (71) is rotatably connected to the connecting support (5) through a rotating shaft (72), one end, located on the suspender (6), of the lever assembly (71) is a movable end, the other end of the lever assembly is a prying end, the movable end is provided with a locking roller (73), and the prying end is provided with a connecting rod (74); the locking control mechanism (8) comprises an outer shell (81) and a sliding block (83), the sliding block (83) is connected with the outer shell (81) through a return spring (82), a sliding groove (11) is formed in one side, located on the sliding block (83), of the main support (1), the sliding block (83) is in sliding connection with the sliding groove (11), the connecting rod (74) is in rotating connection with the sliding block (83), and a wheel shaft of the movable pulley is installed on the sliding block (83); the arrangement position of the lever assembly (71) ensures that the lifting steel wire rope (4) tightly pulls the movable pulley to drive the lever assembly (71), the locking roller (73) and the suspender (6) are in a separated state, the movable pulley is loosened by the lifting steel wire rope (4), the reset spring (82) pushes the sliding block (83) to reset, and after the lever assembly (71) is driven, the locking roller (73) and the suspender (6) are tightly attached and locked.

4. A scaffold fall protection safety device as claimed in claim 3, wherein: two pulleys (3) are arranged and are movable pulleys; the locking mechanism (7) and the locking control mechanism (8) are provided with two sets.

5. A scaffold fall protection safety device as claimed in claim 3, wherein: and the connecting bracket (5) is provided with a locking roller limiting sliding groove (9) matched with the running track of the locking roller (73).

6. A scaffold fall protection safety device as claimed in claim 3, wherein: the sliding block (83) is in sliding connection with the sliding groove (11) through a dovetail groove.

7. A scaffold fall protection safety device as claimed in claim 1, wherein: the hanger rod (6) is arranged close to the outer wall of the building, and a connecting assembly is arranged between the hanger rod (6) and the outer wall of the building for connection.

8. A scaffold fall protection safety device as claimed in claim 1, wherein: and a connecting plate (2) is fixedly installed on the outer side of the main support (1) and is used for being fixedly connected with a lifting basket of the lifting scaffold.