Maintenance cage for tower crane

Abstract

A front folding bottom plate and a rear folding bottom plate are connected through a hinge lug, a front guardrail is arranged on the front portion of the front folding bottom plate, a rear guardrail is arranged on the rear portion of the rear folding bottom plate, and the front guardrail comprises front guardrail supporting rods located on the two sides. A front guardrail horizontal blocking rod is arranged between the upper ends of the two front guardrail supporting rods, a front baffle and two front side plates are arranged on the front portion and the two sides of the front folding bottom plate respectively, and the lower ends of the two front guardrail supporting rods are connected with the two front side plates through rotating shafts. Two horizontally-distributed front guardrail horizontal cross rods are further arranged between the two front guardrail supporting rods, two symmetrically-distributed hanging lugs are arranged on the upper front guardrail horizontal cross rod, and two symmetrically-distributed spring cotters are arranged on the lower front guardrail horizontal cross rod. Meanwhile, the problem that the maintenance cage is damaged and deformed in the transportation process is solved, the cost is reduced for a manufacturing unit and a construction site construction unit, and the tower erecting and descending efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tower cranes, in particular to a maintenance cage for tower cranes. Background Technique

[0002] Tower crane maintenance cages exist widely in both hammerhead tower cranes and flat-top tower cranes and are widely used for high-altitude maintenance operations of tower cranes. Most of these maintenance cages adopt a fixed structure and are welded, with a large space volume. Connecting them to the trolley requires pin connections, and using split pins as locking pins to prevent the shaft pins from withdrawing is very troublesome. In addition, problems such as the need for a large transportation space during the transfer of the tower crane and the transportation of the maintenance cage have been plaguing construction units and manufacturing units. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a maintenance cage for tower cranes, which adopts a folding bottom plate structure. The whole maintenance cage can be folded and stored, which can effectively reduce the space occupied during the transportation of the maintenance cage and effectively solve the problems in the prior art.

[0004] The technical solution adopted by the utility model is: a maintenance cage for tower cranes, including a bottom plate. The bottom plate is composed of a front folding bottom plate and a rear folding bottom plate. The front folding bottom plate and the rear folding bottom plate are connected by hinge ears. A front guardrail is provided at the front of the front folding bottom plate, and a rear guardrail is provided at the rear of the rear folding bottom plate. The front guardrail includes front guardrail support rods on both sides. A front guardrail horizontal bar is provided between the upper ends of the two front guardrail support rods. A front baffle and two front side plates are respectively provided at the front and on both sides of the front folding bottom plate. The lower ends of the two front guardrail support rods are connected to the two front side plates through a rotating shaft. Two horizontally distributed front guardrail horizontal crossbars are also provided between the two front guardrail support rods. Two symmetrically distributed hanging ears are provided at the upper front guardrail horizontal crossbar, and two symmetrically distributed spring bolts are provided at the lower front guardrail horizontal crossbar. The rear guardrail includes rear guardrail support rods on both sides. A rear guardrail horizontal bar is provided between the upper ends of the two rear guardrail support rods. A rear baffle and two rear side plates are respectively provided at the rear and on both sides of the rear folding bottom plate. The lower ends of the two rear guardrail support rods are connected to the two rear side plates through a rotating shaft. Two horizontally distributed rear guardrail horizontal crossbars are also provided between the two rear guardrail support rods. An upper connecting crossbar and a lower connecting crossbar are provided between the front guardrail support rod and the rear guardrail support rod on the same side. The upper connecting crossbar is a pipe section profile. Long grooves are provided at both ends of the upper connecting crossbar and the lower connecting crossbar. Symmetrically distributed pin holes are provided on the pipe section profile on both sides of the long groove. Ear plates matching the long grooves are provided on the front guardrail support rod and the rear guardrail support rod. Ear plate holes are provided on the ear plates. The long grooves cooperate with the above-mentioned ear plates. A locking pin penetrates through the pin holes and the ear plate holes for distribution. An opening pin is provided at the end of the locking pin. The front side plate and the rear side plate on the same side are connected by a locking hook.

[0005] Compared with the prior art, the utility model provides a maintenance cage for a tower crane, which can be installed in a quick-hanging and locking manner with the tower crane trolley, solving the problem that it is time-consuming and laborious for construction site installation and disassembly personnel and eliminating the need for installation pins. The maintenance cage is directly connected to the installation connecting beam of the hoisting trolley through quick hanging. The spring bolt at the lower end of the maintenance cage is connected to the ear plate hole on the lower connecting beam of the hoisting trolley. That is, after the spring bolt is directly inserted into the ear plate hole of the lower beam of the trolley, the installation of the folding cage is completed. In addition, during transportation, the problem of occupying too much transportation space is successfully solved, and at the same time, the problem of damage and deformation of the maintenance cage during transportation is avoided. The solution of these problems reduces the costs for both the manufacturing unit and the construction site construction unit, and improves the efficiency of erecting and lowering the tower crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is a schematic structural view of the utility model;

[0007] Figure 2 is a perspective view of the utility model;

[0008] Figure 3 is a schematic view of the folding state of the utility model;

[0009] Figure 4 is a schematic structural view of the front guardrail of the utility model;

[0010] Figure 5 is a schematic structural view of the hanging ear of the utility model;

[0011] Figure 6 is a schematic structural view of the spring bolt of the utility model;

[0012] Figure 7 is a cross-sectional view of the spring bolt of the utility model;

[0013] Figure 8 is a schematic structural view of the upper connecting cross bar of the utility model;

[0014] Figure 9 is a schematic assembly structural view of the upper connecting cross bar of the utility model;

[0015] Figure 10 is a schematic structural view of the locking hook of the utility model; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the utility model without creative efforts shall fall within the scope of protection of the utility model.

[0017] As Figures 1-10 shown, the utility model discloses a maintenance cage for a tower crane, which comprises a bottom plate 1. The bottom plate 1 is composed of a front folding bottom plate 2 and a rear folding bottom plate 3. The front folding bottom plate 2 and the rear folding bottom plate 3 are connected by a hinge ear 4. A front guardrail 5 is arranged at the front part of the front folding bottom plate 2, and a rear guardrail 6 is arranged at the rear part of the rear folding bottom plate 3. The front guardrail 5 includes front guardrail support rods 7 on both sides. A front guardrail horizontal bar 8 is arranged between the upper ends of the two front guardrail support rods 7. A front baffle 9 and two front side plates 10 are respectively arranged at the front part and both sides of the front folding bottom plate 2. The lower ends of the two front guardrail support rods 7 are connected to the two front side plates 10 through a rotating shaft. Two horizontally distributed front guardrail horizontal crossbars 11 are further arranged between the two front guardrail support rods 7. Two symmetrically distributed hanging ears 12 are arranged at the upper front guardrail horizontal crossbar 11, and two symmetrically distributed spring bolts 13 are arranged at the lower front guardrail horizontal crossbar 11. The rear guardrail 6 includes rear guardrail support rods 14 on both sides. A rear guardrail horizontal bar 15 is arranged between the upper ends of the two rear guardrail support rods 14. A rear baffle 16 and two rear side plates 17 are respectively arranged at the rear part and both sides of the rear folding bottom plate 3. The lower ends of the two rear guardrail support rods 14 are connected to the two rear side plates 17 through a rotating shaft. Two horizontally distributed rear guardrail horizontal crossbars 18 are further arranged between the two rear guardrail support rods 14. An upper connecting crossbar 19 and a lower connecting crossbar 20 are arranged between the front guardrail support rod 7 and the rear guardrail support rod 14 on the same side. The upper connecting crossbar 19 is a pipe section profile. Long grooves 21 are opened at both ends of the upper connecting crossbar 19 and the lower connecting crossbar 20. Symmetrically distributed pin holes 22 are opened on the pipe section profiles on both sides of the long grooves 21. Ear plates 23 matched with the long grooves 21 are arranged on the front guardrail support rod 7 and the rear guardrail support rod 14. Ear plate holes 24 are opened on the ear plates 23. The long grooves 21 are matched with the above ear plates 23. A locking pin 25 passes through the pin holes 22 and the ear plate holes 24 for distribution. An opening pin 26 is arranged at the end of the locking pin 25. The front side plate 10 and the rear side plate 17 on the same side are connected by a locking hook 27.

[0018] When the folding cage leaves the factory, in order to facilitate transportation (non-working state), the folding cage is folded together. After arriving at the construction site (using unit), the specific opening operation is realized as follows:

[0019] First, stretch the front guardrail and the rear guardrail outward to form a 90° angle with the folding bottom plates on both sides. The front guardrail support rod 7 is also provided with a front support rod pin hole 28, and the front side plate 10 is provided with a front side plate pin hole 29 that cooperates with the above-mentioned front support rod pin hole 28. The front guardrail support rod 7 and the front side plate 10 are connected by a front locking pin 30, and the front locking pin 30 is distributed through the front support rod pin hole 28 and the front side plate pin hole 29; the rear guardrail support rod 14 is also provided with a rear support rod pin hole 31, and the rear side plate 17 is provided with a rear side plate pin hole 32 that cooperates with the above-mentioned rear support rod pin hole 31. The rear guardrail support rod 14 and the rear side plate 17 are connected by a rear locking pin 33, and the rear locking pin 33 is distributed through the rear support rod pin hole 31 and the rear side plate pin hole 32.

[0020] Fold the front folding bottom plate 2 and the rear folding bottom plate 3 through the hinge ears 4 to form a plane, and connect the front side plate 10 and the rear side plate 17 through the locking hook 27.

[0021] Connection between the folding cage and the tower crane trolley: First, hook the hanging ear on the upper part of the front guardrail (the hanging ear is welded to the horizontal cross bar of the front guardrail) to the fixed shaft pin on the upper cross bar angle steel of the tower crane trolley, and pull it slightly outward. Let the spring pin at the lower part of the front guardrail (the spring pin is welded to the horizontal cross bar of the front guardrail) be pulled out towards the side of the guardrail leg. Align it with the fixed ear plate hole on the lower cross bar of the side of the tower crane trolley and let go. Under the action of the spring force, insert the front pin shaft of the spring pin into the ear plate hole. At this time, the maintenance cage is quickly installed. When disassembling the maintenance cage, the operation is opposite.

[0022] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A maintenance cage for a tower crane, characterized in that: Comprising a bottom plate (1), the bottom plate (1) is composed of a front folding bottom plate (2) and a rear folding bottom plate (3), and the front folding bottom plate (2) and the rear folding bottom plate (3) are connected by hinge ears (4). A front guardrail (5) is provided at the front of the front folding bottom plate (2), and a rear guardrail (6) is provided at the rear of the rear folding bottom plate (3). The front guardrail (5) includes front guardrail support rods (7) located on both sides, and a front guardrail horizontal bar (8) is provided between the upper ends of the two front guardrail support rods (7). A front baffle (9) and two front side plates (10) are respectively provided at the front and both sides of the front folding bottom plate (2). The lower ends of the two front guardrail support rods (7) are connected to the two front side plates (10) by a rotating shaft. Two horizontally distributed front guardrail horizontal crossbars (11) are further provided between the two front guardrail support rods (7). Two symmetrically distributed hanging ears (12) are provided at the upper front guardrail horizontal crossbar (11), and two symmetrically distributed spring bolts (13) are provided at the lower front guardrail horizontal crossbar (11). The rear guardrail (6) includes rear guardrail support rods (14) located on both sides, and a rear guardrail horizontal bar (15) is provided between the upper ends of the two rear guardrail support rods (14). A rear baffle (16) and two rear side plates (17) are respectively provided at the rear and both sides of the rear folding bottom plate (3). The lower ends of the two rear guardrail support rods (14) are connected to the two rear side plates (17) by a rotating shaft. Two horizontally distributed rear guardrail horizontal crossbars (18) are further provided between the two rear guardrail support rods (14). An upper connecting crossbar (19) and a lower connecting crossbar (20) are provided between the front guardrail support rod (7) and the rear guardrail support rod (14) on the same side. The upper connecting crossbar (19) is a pipe profile. Long grooves (21) are opened at both ends of the upper connecting crossbar (19) and the lower connecting crossbar (20). Symmetrically distributed pin holes (22) are opened on the pipe profiles on both sides of the long grooves (21). Ear plates (23) matching the long grooves (21) are provided on the front guardrail support rod (7) and the rear guardrail support rod (14). Ear plate holes (24) are opened on the ear plates (23). The long grooves (21) cooperate with the above-mentioned ear plates (23). The locking pin (25) passes through the pin holes (22) and is distributed with the ear plate holes (24). An opening pin (26) is provided at the end of the locking pin (25). The front side plate (10) and the rear side plate (17) on the same side are connected by a locking hook (27).

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