A movable safety hook hanger for building construction site

Abstract

The present invention relates to the technical field of construction site safety hook hangers, and specifically to a movable building construction site safety hook hanger, comprising a hanger body, a plurality of hook holes are arranged on the hanger body, a friction fixed top seat is arranged on the top of the hanger body, a lifting device is arranged on the bottom of the hanger body, and the lifting device is installed on a movable base; wherein the movable base is provided with a retractable pulley, and the bottom of the movable base and the top of the friction fixed top seat are both provided with friction surfaces; wherein the lifting device is used to lift the hanger body, so that the top of the friction fixed top seat and the bottom of the movable base can respectively generate friction with the upper floor and the lower floor to meet the falling load requirements generated by the accidental fall of the construction personnel. The present invention can be moved and fixed arbitrarily at the construction site, which greatly improves the construction efficiency and safety factor.

Description

Technical Field

[0001] The invention relates to the technical field of construction site safety hook hangers, and in particular to a movable building construction site safety hook hanger. Background Art

[0002] The information disclosed in the background of the invention is only intended to enhance the understanding of the overall background of the invention and should not be necessarily regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0003] The "Height Work Classification" standard stipulates that any work performed at a height above 2m (including 2m) from the falling height reference plane, where there is a possibility of falling, is called height work. Relevant construction workers must wear safety belts, and the safety belts should be hung high and used low to ensure stability and reliability. However, when performing high-altitude work such as edge work or electromechanical installation at traditional building construction sites, there are often problems such as the inability to fix the safety hooks or the insufficient number of safety hook hanging points, which seriously affects the safety of construction workers. Summary of the invention

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide a movable safety hook hanger for building construction sites.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A movable safety hook hanger for building construction site, comprising a hanger body, a plurality of hook holes are arranged on the hanger body, a friction fixed top seat is arranged on the top of the hanger body, a lifting device is arranged on the bottom of the hanger body, and the lifting device is installed on a movable base; wherein the movable base is provided with a retractable pulley, and friction surfaces are arranged on the bottom of the movable base and the top of the friction fixed top seat;

[0007] The lifting device is used to lift the main body of the rack, so that the top of the friction fixed top seat and the bottom of the movable base generate friction force F with the upper floor and the lower floor respectively. f , the F f satisfy:

[0008] F f >F up And F f >F down

[0009] F0sinθl1=F down (l1+l2)

[0010] F f =μN

[0011] F0=aM

[0012] Where F0 is the fall load generated when a construction worker falls accidentally, a is the fall coefficient, μ is the friction coefficient, N is the hydraulic pressure, and F up is the top reaction force of the safety hook bracket, F down F is the bottom reaction force of the safety hook bracket; f is the friction force; l1 is the distance between the safety belt hanging point and the upper floor; l2 is the distance between the safety belt hanging point and the lower floor; M is the weight of the construction worker; θ is the angle between the falling direction and the safety hook bracket.

[0013] Preferably, the friction surface includes friction lines in at least two directions, horizontal and vertical.

[0014] Preferably, the lifting device includes a quick lifting portion and a fine-adjustment lifting portion.

[0015] Preferably, the rapid lifting portion comprises a foot-operated switch, and the fine-adjustment lifting portion is a hand-operated switch.

[0016] Preferably, the lifting device is a hydraulic lifting device, and the fine-tuning lifting part includes a hydraulic lifting body and a hydraulic pressure control device. The hydraulic pressure control device displays the size of the hydraulic pressure, and the hydraulic pressure of the hydraulic lifting body reaches a specified numerical range through the hydraulic pressure applying handle.

[0017] Preferably, the bracket body includes four corner auxiliary support steel pipes, a core support steel pipe and a hook steel plate; the hook steel plate has four hook holes arranged in different directions for construction workers to wear safety belts.

[0018] Preferably, a is 1.5 to 2, and μ is 0.5 to 0.7.

[0019] Preferably, the hydraulic pressure N of the hydraulic lifting body is less than or equal to F cr , In the formula, F cr is the critical bearing capacity of the core supporting steel pipe in the main body of the pylon, E is the elastic modulus, I is the section moment of inertia, and l is the length of the main body of the pylon.

[0020] Beneficial effect: The present invention can be moved and fixed at will on the construction site through the movable base at the bottom, and the safety hook bracket is fixed between the upper floor and the lower floor by applying vertical force through the lifting device, so that the friction between the safety hook bracket and the floor can meet the falling load requirements caused by accidental falling after the construction workers hang the safety belt on the safety hook bracket; the safety hazards caused by the difficulty of hanging the safety belt on the traditional building construction site are eliminated, and the construction efficiency and safety factor are greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the friction fixed top seat;

[0023] Figure 3 It is a structural schematic diagram of the main body of the rack;

[0024] Figure 4 A schematic diagram of a fine-tuning lifting portion;

[0025] Figure 5 It is a schematic diagram of the upper structure of the movable base;

[0026] Figure 6 It is a schematic diagram of the lower structure of the movable base;

[0027] Figure 7 Schematic diagram of the pulley folding upwards;

[0028] Figure 8 This is a schematic diagram of the on-site application of the safety hook hanger at the building construction site;

[0029] Fig. 9 This is a schematic diagram showing the forces acting on the safety hook bracket at the building construction site;

[0030] In the figure, there are friction fixed top seat 1; bracket body 2; lifting device 3; quick lifting part 4; movable base 5; serrated friction surface of top seat 6; four corner auxiliary support steel pipes 7; core support steel pipe 8; hook steel plate 9; hook hole 10; hydraulic lifting body 11; hydraulic pressure control device 12; hydraulic pressure application handle 13; pulley 14; serrated friction surface of base 15; upper floor 16; lower floor 17; construction workers 18; work frame 19; safety belt 20. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

[0032] Embodiment 1

[0033] Figures 1 to 9 A movable safety hook hanger for building construction site is presented. Figure 1 As shown, it includes a hanger body 2, on which a plurality of hook holes 10 are arranged, a friction fixing top seat 1 is arranged on the top of the hanger body 2, and a lifting device 3 is arranged at the bottom of the hanger body 2, and the lifting device 3 is installed on a movable base 5; wherein the movable base 5 is provided with a retractable pulley 14, as shown in FIG. Figure 7As shown, the mixing wheel 14 can be folded upward, the bottom of the movable base 5 is provided with a base serrated friction surface 15, and the top of the friction fixed top seat 1 is provided with a top seat serrated friction surface 6; wherein, the lifting device 3 is used to lift the hanger body 2, so that the top of the friction fixed top seat 1 and the bottom of the movable base 5 respectively generate friction F with the upper floor 16 and the lower floor 17 f ,like Fig. 9 As shown, the F f satisfy:

[0034] F0sinθl2=F up (l1+l2) (1.1) F0sinθl1=F down (l1+l2) (1.2)

[0035] F f =μN (1.3)

[0036] F0=aM (1.4)

[0037] Where F0 is the fall load generated when a construction worker falls accidentally, a is the fall coefficient, μ is the friction coefficient, N is the hydraulic pressure, and F up is the top reaction force of the safety hook bracket, F down F is the bottom reaction force of the safety hook bracket; f is the friction force; l1 is the distance between the hanging point of the safety belt 20 and the upper floor 16; l2 is the distance between the hanging point of the safety belt 20 and the lower floor; M is the weight of the construction worker 18; θ is the angle between the falling direction and the safety hook bracket.

[0038] like Figure 2 and Figure 6 As shown, further, in this embodiment, the friction surface includes friction lines in at least two directions, namely, transverse and longitudinal directions.

[0039] Furthermore, in this embodiment, the lifting device 3 includes a fast lifting part 4 and a fine-adjustment lifting part. The fast lifting part 4 can be a hydraulic cylinder, and the fine-adjustment lifting part can be a hydraulic jack.

[0040] Furthermore, in this embodiment, the quick lifting portion 4 includes a foot-operated switch, and the fine-adjusting lifting portion is a hand-operated switch.

[0041] The lifting device 3 may also be an electric lifting device 3 (such as an electric cylinder). In this embodiment, the lifting device 3 is a hydraulic lifting device. The hydraulic lifting device has the advantage of a large load and can meet the on-site construction requirements to a greater extent. Figure 4As shown, the fine-tuning lifting part includes a hydraulic lifting body 11 and a hydraulic pressure control device 12. The hydraulic pressure control device 12 displays the hydraulic pressure. The hydraulic pressure of the hydraulic lifting body 11 reaches a specified value range through a hydraulic pressure applying handle 13.

[0042] Furthermore, in this embodiment, if Figure 3 As shown, the bracket body 2 includes four corner auxiliary support steel pipes 7, a core support steel pipe 8 and a hook steel plate 9; the hook steel plate 9 is provided with four hook holes 10 for construction workers 18 to wear safety belts 20 along different directions.

[0043] Furthermore, in this embodiment, a is 1.5 to 2, and μ is 0.5 to 0.7.

[0044] Furthermore, in this embodiment, the hydraulic pressure N of the hydraulic lifting body 11 is less than or equal to F. cr ,

[0045]

[0046] In the formula, F cr is the critical bearing capacity of the core supporting steel pipe 8 in the bracket body 2, E is the elastic modulus, I is the section moment of inertia, and l is the length of the bracket body 2.

[0047] Beneficial effect: The present invention can be moved arbitrarily at the construction site through the movable base 5 at the bottom, and the safety hook bracket is fixed between the upper floor 16 and the lower floor 17 by applying vertical force through the lifting device 3, so that the friction between the safety hook bracket and the floor can meet the falling load requirement caused by the accidental fall of the construction worker 18 after hanging the safety belt 20 on the safety hook bracket; the safety hazard caused by the difficulty of hanging the safety belt 20 at the traditional building construction site is eliminated, and the construction efficiency and safety factor are greatly improved.

[0048] Embodiment 2

[0049] The parts not mentioned in this embodiment may be the same as those in the above embodiments.

[0050] like Figure 8 As shown, the embodiment of the present invention is fixed between the upper floor 16 and the lower floor 17, and the construction worker 18 stands on the work frame 19, and the work frame 19 is 2.5 meters high, which belongs to high-altitude work. The construction worker 18 is hung on the hook hole 10 through the safety belt 20.

[0051] In this embodiment, it is known that the weight M of the construction worker 18 is 100 kg, the distance (l1+l2) between the upper floor 16 and the lower floor 17 is 4.2 m, and the height l2 of the safety belt 20 is 3.5 m; the friction coefficient μ between the upper floor 16 and the serrated friction surface of the top seat is 0.5, and the friction coefficient μ between the lower floor 17 and the serrated friction surface of the base is 0.6; the maximum applied load of the hydraulic lifting body 11 is 40 kN;

[0052] The core support steel pipe 8 has an outer diameter of 200 mm and a wall thickness of 15 mm, and the hook steel plate 9 has a size of 600 mm×600 mm×50 mm.

[0053] The angle θ between the falling direction and the safety hook hanger is taken as 90°, at which time the safety belt 20 is perpendicular to the hanger body 2, which is the most unfavorable state.

[0054] It can be known from the formula that the falling load F0 on the bracket body 2 caused by the fall of the construction worker 18 is 1500N.

[0055] According to formula (1.1) and formula (1.2), the top reaction force F of the safety hook bracket is up =1250N, safety hook bracket bottom reaction force F down =250N.

[0056] The friction force between the present invention and the floor slab should meet the fall load requirement generated by the construction worker 18 accidentally falling after hanging the safety belt 20 on the hook steel plate 9. From formula (1.3), it can be seen that the applied hydraulic pressure N = 2500N.

[0057] According to formula (1.5), the critical bearing capacity F of the core support steel pipe 8 is cr =235kN.

[0058] It is known that the design construction load of the floor is 5kN / m2, and the corresponding hydraulic pressure limit is 1800kN.

[0059] It can be seen that the hydraulic pressure N=2500N required for the present invention meets the stability verification requirements of the core support steel pipe 8 and the design construction load requirements of the floor.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A movable safety hook hanger for building construction site, comprising a hanger body, on which a plurality of hook holes are arranged, characterized in that: A friction fixed top seat is arranged on the top of the hanger body, and a lifting device is arranged on the bottom of the hanger body, and the lifting device is installed on a movable base; Wherein, the movable base is provided with a retractable pulley, and the bottom of the movable base and the top of the friction fixed top seat are both provided with friction surfaces; The lifting device is used to lift the main body of the rack, so that the top of the friction fixed top seat and the bottom of the movable base generate friction force F with the upper floor and the lower floor respectively. f , the F f satisfy: In the formula, It is the fall load caused by accidental fall of construction workers. is the fall coefficient, is the friction coefficient, is the hydraulic pressure, is the top reaction force of the safety hook bracket, is the bottom reaction force of the safety hook bracket; is the friction force; The distance between the safety belt hanging point and the upper floor; The distance between the safety belt hanging point and the lower floor slab; The weight of the construction workers; It is the angle between the falling direction and the safety hook bracket; The lifting device includes a quick lifting part and a fine-adjusting lifting part; the quick lifting part includes a foot-operated control switch, and the fine-adjusting lifting part is a hand-operated switch; is 1.5~2, 0.5~0.7; Hydraulic force of hydraulic lifting body , ; In the formula, F cr is the critical bearing capacity of the core supporting steel pipe in the main body of the bracket. is the elastic modulus, Moment of inertia of area, is the length of the bracket body.

2. The movable building construction site safety hook hanger according to claim 1 is characterized in that: The friction surface includes friction lines in at least two directions, horizontal and vertical.

3. The movable building construction site safety hook hanger according to claim 1 is characterized in that: The lifting device is a hydraulic lifting device, and the fine-tuning lifting part includes a hydraulic lifting body and a hydraulic pressure control device. The hydraulic pressure control device displays the size of the hydraulic pressure, and the hydraulic pressure of the hydraulic lifting body reaches a specified numerical range through a hydraulic pressure applying handle.

4. The movable building construction site safety hook hanger according to claim 3 is characterized in that: The bracket body includes four corner auxiliary support steel pipes, a core support steel pipe and a hook steel plate; the hook steel plate is arranged with four hook holes in different directions for construction workers to wear safety belts.

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