Anti-falling safety device for building hoisting machinery

Abstract

The utility model relates to the technical field of anti-falling devices, and particularly discloses an anti-falling safety device for building hoisting machinery, which comprises a shell and a front cover, a rope winding piece is rotatably connected between the shell and the front cover, the rope winding piece is connected with a steel rope, the steel rope penetrates through the bottom of the shell to be fixedly connected with a safety hook, and a centrifugal piece is fixedly connected to one side close to the rope winding piece. A speed limiting ring is fixedly connected to the side, close to the centrifugal part, of the front cover, through cooperation of the centrifugal part and the speed limiting ring, when a worker suddenly falls, friction braking is generated between a roller of the centrifugal part and the speed limiting ring under the action of centrifugal force instead of instant locking, impact force generated by falling is dispersed within a long time and a long distance, direct impact on a human body is relieved, and the safety of the worker is improved. And through the continuously changing friction effect between the centrifugal part roller and the speed limiting ring, the worker can descend to the ground at a slow speed, the worker is prevented from being trapped in the air, and the worker is prevented from being in a dangerous environment for a long time.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of anti -fall device, concretely is a building hoisting machinery is with anti -fall safety device. BACKGROUND

[0002] When using building hoisting machinery to work, the staff usually uses the anti -fall device when returning to the ground from the hoisting machinery, the traditional anti -fall device is borrowed from the instantaneous locking principle of the car safety belt, and the steel cable is locked instantly when the staff climbs accidentally falls, so as to prevent falling, but the strong impact force generated by instantaneous locking can directly act on the human body, which may cause the operating personnel to suffer, in addition, once the instantaneous locking is triggered when falling, and the operating personnel cannot touch the leverage point, the operating personnel often cannot move in the air, and can only wait for external rescue, which not only makes the operating personnel in a dangerous situation for a long time, intensifies the psychological fear and physical discomfort, and in the process of waiting for rescue, secondary accidents may also be caused by environmental factors, therefore, we propose a building hoisting machinery is with anti -fall safety device. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing a building hoisting machinery is with anti -fall safety device to solve the problems in the prior art.

[0004] In order to achieve the above object, the utility model provides the following technical scheme: a building hoisting machinery is with anti -fall safety device, including casing and front cover, the casing and front cover are rotatably connected with the rope winding piece, the rope winding piece is connected with the steel cable, the steel cable passes through the bottom of the casing and is fixedly connected with the safety hook, the rope winding piece is fixedly connected with the centrifugal piece close to the front cover side, the front cover is fixedly connected with the speed limiting ring close to the centrifugal piece side.

[0005] Among them, the centrifugal piece includes a clamping groove disc, a plurality of sliding grooves are arranged near the circular edge of the clamping groove disc, and a plurality of rollers are arranged in the sliding grooves.

[0006] Among them, the sliding grooves are equidistantly distributed.

[0007] Among them, the sliding grooves are superior arcs, and the radius of the rollers is greater than the chord length of the clamping groove disc.

[0008] Among them, the rollers and the speed limiting ring are all of rubber material.

[0009] Among them, a plurality of arc-shaped protrusions are arranged in the speed limiting ring, and grooves are arranged between the protrusions.

[0010] Among them, the plurality of protrusions and grooves in the speed limiting ring are generally wave-shaped.

[0011] Among them, the rope winding piece includes a fixed shaft, the fixed shaft is fixedly connected with the casing and the front cover, the fixed shaft is fixedly connected with a coil spring, the outer side of the coil spring is fixedly connected with a rotating ring, and the rotating ring is fixedly connected with a baffle on both sides.

[0012] The shell top is connected with a fixing rope, and the fixing rope is fixedly connected with a fixing hook.

[0013] The steel cable is twisted by multiple high-strength steel wires, and has a wear-resistant coating on the surface.

[0014] The utility model at least has following beneficial effects:

[0015] The utility model discloses a safety device for rescue personnel, which comprises a shell, a front cover, a winding rope piece, a steel cable, a safety hook, a centrifugal piece and a speed limiting ring. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is an internal structure expansion schematic diagram of the utility model;

[0018] Figure 3 It is a winding rope piece expansion structure schematic diagram of the utility model;

[0019] Figure 4 It is a structure front view schematic diagram of the centrifugal piece and the speed limiting ring of the utility model;

[0020] In the drawing: 1, shell; 11, fixing rope; 12, fixing hook; 2, front cover; 3, winding rope piece; 31, fixed shaft; 32, winding spring; 33, rotating ring; 34, baffle; 4, steel cable; 5, safety hook; 6, centrifugal piece; 61, clamping groove disc; 62, sliding groove; 63, roller; 7, speed limiting ring; 71, protruding block; 72, recess. DETAILED DESCRIPTION

[0021] With reference to the drawings of the embodiments of the utility model, the technical scheme in the embodiments of the utility model will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments, based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the range of protection of the utility model.

[0022] Embodiment one

[0023] Please refer to Figures 1 to 4 The utility model provides a technical scheme: a kind of anti-falling safety device for building hoisting machinery, including shell 1 and front cover 2, shell 1 and front cover 2 are rotatably connected with winding rope piece 3, winding rope piece 3 is connected with steel cable 4, steel cable 4 is twisted from multiple high-strength steel wires, and there is wear-resistant coating on surface, steel cable 4 is fixedly connected with safety hook 5 by passing through shell 1 bottom, winding rope piece 3 is fixedly connected with centrifugal piece 6 close to one side of front cover 2, front cover 2 is fixedly connected with speed-limiting ring 7 close to centrifugal piece 6 side.

[0024] Winding rope piece 3 includes fixed shaft 31, fixed shaft 31 is fixedly connected with shell 1 and 2, fixed shaft 31 is fixedly connected with winding spring 32, winding spring 32 outer side is fixedly connected with rotating ring 33, rotating ring 33 both sides are fixedly connected with baffle 34, steel cable 4 is fixedly connected on the outer surface of rotating ring 33, winding spring 32 utilizes the elastic property of itself, a certain torque force is exerted to rotating ring 33 under initial state, when steel cable 4 has action of winding and unwinding when normal working, winding spring 32 will contract or dilate accordingly, the tension of steel cable 4 is adjusted by this elastic deformation, so that steel cable 4 always maintains moderate tight state, and after the use of staff ends, winding spring 32 can drive rotating ring 33 reverse rotation, so as to automatically retract steel cable 4.

[0025] The centrifugal part 6 comprises a clamping groove disc 61, a plurality of sliding grooves 62 are arranged near the circular edge of the clamping groove disc 61, a plurality of rollers 63 are arranged in the sliding grooves 62, the clamping groove disc 61 is equidistantly distributed, the sliding grooves 62 are arc-shaped, the radius of the roller 63 is greater than the chord length of the clamping groove disc 61, a plurality of arc-shaped protrusions 71 are arranged in the speed limiting ring 7, and grooves 72 are arranged between the protrusions 71; the protrusions 71 and the grooves 72 in the speed limiting ring 7 are collectively wave-shaped; in use, when the winding rope part 3 starts to rotate, the centrifugal part 6 rotates synchronously; under normal low-speed rotation, the roller 63 maintains a relatively stable position in the sliding groove 62 of the clamping groove disc 61 due to small centrifugal force; once the worker suddenly falls, the rotating speed of the winding rope part 3 rapidly increases, and the centrifugal part 6 also rotates at high speed; at this time, under the action of strong centrifugal force, the roller 63 is partially thrown out of the sliding groove 62; after the roller 63 is thrown out, the roller 63 contacts the speed limiting ring 7; since the protrusions 71 and the grooves 72 in the speed limiting ring 7 are collectively wave-shaped, and the roller 63 and the speed limiting ring 7 are both made of rubber and have certain elasticity and friction, when the roller 63 enters the groove 72, a large friction force is generated between the roller 63 and the groove 72; the friction force obviously hinders the rotation of the winding rope part 3, thereby effectively reducing the falling speed of the steel cable 4 and achieving a preliminary braking effect; with the continuous rotation of the centrifugal part 6, when the roller 63 rotates to the position of the protrusion 71 of the speed limiting ring 7 along with the clamping groove disc 61, the protrusion 71 gradually pushes the roller 63 back into the groove 72; in this process, the contact state of the roller 63 with the protrusion 71 and the groove 72 changes, and the friction force correspondingly decreases; however, since the winding rope part 3 is still in a high-speed rotating state, the centrifugal force causes the roller 63 to be thrown out again to contact the groove 72, and the process is repeated; through the dynamic process that the roller 63 is continuously thrown out and pushed back into the groove 72, the falling speed of the steel cable 4 can be continuously controlled in a relatively low and stable range.

[0026] The working principle of the utility model is as follows: when the staff needs to return to the ground, the fixed hook 12 of the device is fixed on the hoisting machinery, and the safety hook 5 is fixed on the body, when the staff suddenly falls while climbing the stairs, the steel cable 4 will rapidly pull the rope winding part 3 to rotate at high speed, with the sharp increase of the rotating speed of the rope winding part 3, the centrifugal force borne by the centrifugal part 6 rapidly increases, due to the effect of the centrifugal force, the roller 63 in the sliding groove 62 of the clamping groove disc 61 is thrown out, because the roller 63 and the speed limiting ring 7 are both made of rubber material, and have certain elasticity and friction, when the thrown roller 63 contacts the groove 72 part of the speed limiting ring 7, the friction between the two is relatively large, the friction will hinder the rotation of the rope winding part 3, thereby greatly reducing the falling speed of the steel cable 4, effectively reducing the falling risk of the staff, with the continuous high-speed rotation of the centrifugal part 6, when the roller 63 rotates to the position of the protruding block 71 of the speed limiting ring 7 along with the clamping groove disc 61, the protruding block 71 will gradually push the roller 63 back into the groove 72, in this process, because the contact area and pressure of the roller 63, the protruding block 71 and the groove 72 change, the friction will decrease accordingly, but because the rope winding part 3 is still rotating at high speed, the centrifugal force will again make the roller 63 thrown out and contact the groove 72, so the cycle is repeated, through the dynamic process that the roller 63 is continuously thrown out and pushed back into the groove 72, the falling speed of the steel cable 4 is always kept in a relatively low and stable range, ensuring that the staff can slowly land, avoiding the strong impact force caused by instantaneous locking from damaging the human body and the steel cable, and also solving the problem that the staff is trapped in the air and cannot descend by himself.

[0027] Embodiment two

[0028] Please refer to Figure 1 In the embodiment two, other structures are unchanged, and different from the embodiment one, the fixed rope 11 is connected at the top of the shell 1, and the fixed hook 12 is fixedly connected to the fixed rope 11, by adopting the hook type connection, the anti-falling device does not need to be fixedly installed on the hoisting machinery, and the device can be installed conveniently and quickly.

[0029] It should be noted that, in this document, the terms such as first and second are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0030] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fall protection safety device for a construction crane comprising a housing (1) and a front cover (2), characterized in that: The shell (1) and the front cover (2) are rotatably connected with a rope winding member (3), the rope winding member (3) is connected with a steel cable (4), the steel cable (4) is fixedly connected with a safety hook (5) through the bottom of the shell (1), the rope winding member (3) is fixedly connected with a centrifugal member (6) near one side of the front cover (2), and the front cover (2) is fixedly connected with a speed limiting ring (7) near one side of the centrifugal member (6).

2. A fall arrest safety device for a construction hoist according to claim 1, characterised in that: The centrifugal member (6) comprises a clamping groove disc (61), a plurality of sliding grooves (62) are formed near the circular edge of the clamping groove disc (61), and a plurality of rollers (63) are arranged in the sliding grooves (62).

3. A fall arrest safety device for a construction hoist according to claim 2, characterised in that: The sliding grooves (62) are equidistantly distributed.

4. A safety device against falling according to claim 2, characterized in that: The sliding grooves (62) are superior arcs, and the radius of the roller (63) is greater than the chord length of the clamping groove disc (61).

5. A safety device against falling according to claim 2, characterized in that: The roller (63) and the speed limiting ring (7) are both made of rubber.

6. A safety device against falling according to claim 1, characterized in that: The speed limiting ring (7) is internally provided with a plurality of arc-shaped protrusions (71), and the protrusions (71) are provided with grooves (72) therebetween.

7. A fall arrest safety device for a construction hoist according to claim 6, characterised in that: The plurality of protrusions (71) and the grooves (72) in the speed limiting ring (7) are collectively in a wave shape.

8. A safety device against falling according to claim 1, characterized in that: The rope winding member (3) comprises a fixed shaft (31), the fixed shaft (31) is fixedly connected with the shell (1) and the front cover (2), the fixed shaft (31) is fixedly connected with a winding spring (32), the winding spring (32) is fixedly connected with a rotating ring (33) on the outer side, and the rotating ring (33) is fixedly connected with a baffle (34) on both sides.

9. The anti-falling safety device for a construction hoisting machine according to claim 1, characterized in that: The shell (1) is connected with a fixed rope (11) on the top, and the fixed rope (11) is fixedly connected with a fixed hook (12).

10. The anti-falling safety device for a construction hoisting machine according to claim 1, characterized in that: The steel cable (4) is twisted by a plurality of high-strength steel wires, and has a wear-resistant coating on the surface.

Images