CN112551342A

CN112551342A - Prefabricated staircase hoist

Info

Publication number: CN112551342A
Application number: CN201910853628.9A
Authority: CN
Inventors: 罗恒贤; 杨威; 田士川
Original assignee: Guangdong Bozhilin Robot Co Ltd
Current assignee: Guangdong Bozhilin Robot Co Ltd
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2021-03-26

Abstract

The invention discloses a prefabricated staircase sling, which comprises: the horizontal frame is provided with a plurality of movable lifting lugs which are arranged in a plurality of rows and a plurality of columns, the distance between the movable lifting lugs in the same row is adjustable, and the distance between the movable lifting lugs in the same column is adjustable; the top ends of the pull cables are respectively connected to the movable lifting lugs, and the bottom ends of the pull cables are used for connecting the prefabricated staircase; the top part is positioned above the horizontal frame; the bottom ends of the plurality of concentrated cables are dispersedly connected to the horizontal frame, and the upper ends of the plurality of concentrated cables are connected to the top part. According to the prefabricated staircase lifting tool disclosed by the embodiment of the invention, the lifting of prefabricated staircases with various specifications and different suspension point positions can be realized, the lifting tool is convenient and quick, and the lifting tool cost is saved. The problem that the prefabricated staircase is subjected to irreversible structural damage in the hoisting process can be avoided.

Description

Prefabricated staircase hoist

Technical Field

The invention relates to the field of building construction equipment, in particular to a prefabricated stair lifting appliance.

Background

In the building process of modern buildings, prefabricated stairs are adopted for many buildings to shorten the construction period. Because the whole prefabricated staircase is inclined, and both ends of the prefabricated staircase are horizontally installed, a special lifting appliance needs to be manufactured for lifting operation to keep the horizontal of the installation nodes at both ends. In a general construction site, the prefabricated staircases are hoisted by using iron carrying poles, but the levelness of the prefabricated staircases cannot be automatically adjusted in the hoisting process, so that a plurality of workers are required to manually press the prefabricated staircases to adjust the levelness of the prefabricated staircases. In addition, because the lifting rope can't be perpendicular with prefabricated staircase, consequently the lifting rope of slope also can produce horizontal component to the stair in hoist and mount in-process, produces the destruction to prefabricated staircase easily in hoist and mount in-process.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the prefabricated staircase lifting appliance provided by the invention can meet the lifting requirements of various prefabricated staircases and is high in practicability.

The prefabricated staircase sling according to the embodiment of the invention comprises: the movable lifting lugs are arranged in multiple rows and multiple columns, the distance between the movable lifting lugs in the same row is adjustable, and the distance between the movable lifting lugs in the same column is adjustable; the top ends of the pull cables are respectively connected to the movable lifting lugs, and the bottom ends of the pull cables are used for being connected with the prefabricated staircase; a top piece located above the horizontal shelf; the bottom ends of the plurality of concentrated cables are dispersedly connected to the horizontal frame, and the upper ends of the plurality of concentrated cables are connected to the top part.

According to the prefabricated staircase lifting tool disclosed by the embodiment of the invention, the lifting of prefabricated staircases with various specifications and different suspension point positions can be realized, the lifting tool is convenient and quick, and the lifting tool cost is saved. And because the inhaul cable can cooperate the change needs that different suspend in midair positions and roll adjustment, make the inhaul cable can both keep the natural state of dangling when the prefabricated staircase of multiple specification of hoist and mount, make prefabricated staircase not receive horizontal direction component, avoid producing irreversible structural damage to prefabricated staircase at the hoist and mount in-process. In addition, in some embodiments, the prefabricated staircase can keep the required pose for installation when being suspended, and when the prefabricated staircase is hoisted to an installation point for installation, the prefabricated staircase does not need to be pressed by great force or the posture of the prefabricated staircase is adjusted, so that the labor intensity of workers is reduced. The prefabricated staircase sling with the position-adjustable stay rope can use the same prefabricated staircase sling when hoisting various prefabricated staircases, saves the sling cost for a construction side, and also saves the time for replacing the sling.

In some embodiments, the horizontal shelf comprises: two parallel beams; the movable lifting lug comprises two longitudinal beams arranged in parallel, wherein each longitudinal beam is connected to two cross beams, at least one longitudinal beam slides along the two cross beams through a first sliding matching piece, a plurality of movable lifting lugs are arranged on the two longitudinal beams, and at least part of the movable lifting lugs slide along the longitudinal beams through a second sliding matching piece.

Specifically, the first sliding fit piece is fixedly connected with the longitudinal beams and sleeved outside the longitudinal beams, and the two ends of each transverse beam are sleeved with the first sliding fit pieces to be matched with the two longitudinal beams.

Furthermore, two ends of each longitudinal beam are respectively provided with one movable lifting lug, each movable lifting lug is arranged on the second sliding fit piece, and the second sliding fit piece is sleeved on the longitudinal beam.

In some embodiments, the prefabricated staircase spreader further comprises: a drive assembly for driving the movable lug to move.

Specifically, the drive assembly includes: the two transverse push rods are respectively arranged on the two cross beams, and two ends of each transverse push rod are respectively connected with the two longitudinal beams; the plurality of longitudinal push rods are arranged on the two longitudinal beams, and the plurality of longitudinal push rods and the plurality of movable lifting lugs are arranged in a one-to-one correspondence mode.

Optionally, a plurality of said centralizing cables are connected to a plurality of said displaceable ears.

In some embodiments, at least a portion of the pull cords have a vertically telescoping rod thereon.

In some embodiments, a plurality of the centralizing cables and at least a portion of the bracing cables have a length fine adjustment structure thereon.

Specifically, prefabricated staircase hoist still includes: a displacement sensor for measuring the displacement of the movable lifting lug.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a front view of the assembly of a prefabricated staircase spreader and prefabricated stairways according to one embodiment of the invention.

Fig. 2 is a top view of the structure shown in fig. 1.

Fig. 3 is a side view of the structure shown in fig. 1.

FIG. 4 is a top view of a horizontal shelf and structures thereon according to one embodiment of the present invention.

Fig. 5 is a front view of the structure shown in fig. 4.

Fig. 6 is a side view of the structure shown in fig. 4.

Reference numerals:

a prefabricated staircase sling 1,

Horizontal frame 11, cross beam 111, longitudinal beam 112, movable lifting lug 113, first sliding matching part 114, second sliding matching part 115, sliding rail 116,

A driving component 12, a transverse push rod 121, a longitudinal push rod 122, an electric cabinet 123,

A guy cable 13, a vertical telescopic rod 131, a flat mouth hook 132, a shackle 133,

A top part 14,

A length fine-adjustment structure 15, a turnbuckle sleeve 151, a turnbuckle joint 152,

A concentration rope 16, a pressed steel wire rope 161, a hook 162,

And (5) prefabricating the staircase 2.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "length", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A prefabricated staircase spreader 1 according to an embodiment of the present invention, which is used to hoist a prefabricated staircase 2 during construction, will be described with reference to fig. 1 to 6.

A prefabricated staircase spreader 1 according to an embodiment of the invention, as shown in fig. 1-3, comprises: a horizontal shelf 11, a plurality of guys 13, a topper 14, and a plurality of centralizing cables 16.

The top of a plurality of cable 13 is connected respectively on horizontal shelf 11, and the bottom of a plurality of cable 13 is used for connecting prefabricated staircase 2. The top member 14 is positioned above the horizontal frame 11, a plurality of concentrated cables 16 are dispersedly connected to the horizontal frame 11 at their lower ends, and a plurality of concentrated cables 16 are connected to the top member 14 at their upper ends.

Be equipped with the multiple suspension point of spaced on prefabricated staircase 2, many cables 13 connect respectively on a plurality of suspension point, and many cables 13 top are connected horizontal bracket 11, connect on horizontal bracket 11 again on top 14 by many centralized cables 16, make things convenient for top 14 to connect and hoist on crane, building machine etc. row hoist device. When the prefabricated staircase sling 1 is assembled on the prefabricated staircase 2, the horizontal frame 11 needs to be kept to be in a horizontal state, the stay cable 13 is in a natural suspension state as far as possible, and therefore in the hoisting process, the horizontal frame 11 is kept horizontal, the relative change of the height of each suspension point in the hoisting process can be guaranteed, the prefabricated staircase 2 can be kept balanced in the suspension process, and the risk that the prefabricated staircase 2 falls off obliquely is reduced.

Here, the arrangement mode of the hanging point on the prefabricated staircase 2 is not limited, for example, a pre-buried hole may be arranged on the prefabricated staircase 2, and the bottom end of the pulling cable 13 is connected to the pre-buried hole through a detachable locking pin. For example, the prefabricated staircase 2 is provided with an embedded hook, and the bottom end of the inhaul cable 13 can be directly hung on the embedded hook.

Wherein the wire 13 is arranged to remain in a natural suspended state in that the wire 13 provides only an upward pulling force to the suspending point without applying a horizontal component to the suspending point when the hoist is arranged. Therefore, on one hand, the prefabricated staircase 2 can be prevented from being greatly dislocated relative to the horizontal frame 11 in the horizontal direction to cause gravity center unbalance, and on the other hand, the prefabricated staircase 2 can be prevented from being damaged 2 due to the fact that the horizontal component force bears more than ten million suspension points.

In the embodiment of the present invention, as shown in fig. 4 to 6, the horizontal frame 11 is provided with a plurality of movable lifting lugs 113, the plurality of movable lifting lugs 113 are arranged in a plurality of rows and a plurality of columns, the distance between the plurality of movable lifting lugs 113 in the same row is adjustable, and the distance between the plurality of movable lifting lugs 113 in the same column is adjustable. That is, the plurality of movable lifting lugs 113 are arranged in a lattice on the horizontal frame 11, and the distance between each point is adjustable. It should be noted that the plurality of movable lifting lugs 113 in the same row may be on the same straight line, or may be substantially on the same straight line (i.e. there may be a certain distance between the respective movable lifting lug 113 and the straight line). The plurality of movable ears 113 in the same row may be collinear or substantially collinear (i.e., there may be individual movable ears 113 that are some distance from the row). The straight lines of the rows and the straight lines of the columns can be perpendicular to each other, and can also form acute angles or obtuse angles. The plurality of pulling cables 13 are connected to the plurality of movable lifting lugs 113, so that the plurality of pulling cables 13 are arranged in a plurality of rows and a plurality of columns, and the distance between the pulling cables 13 is adjustable.

According to the prefabricated staircase lifting tool 1 provided by the embodiment of the invention, the prefabricated staircase 2 with various specifications and different suspension point positions can be lifted conveniently and quickly, and the lifting tool cost is saved. And because the inhaul cable 13 can adjust the distance in coordination with the change requirements of different suspension point positions, the inhaul cable 13 can keep a natural suspension state when the prefabricated staircase 2 with various specifications is hoisted, so that the prefabricated staircase 2 is not subjected to horizontal component force, and the irreversible structural damage to the prefabricated staircase 2 in the hoisting process is avoided.

Here, the pose of the prefabricated staircase 2 after installation in the building is referred to as the horizontal state. When the prefabricated staircase hanger 1 is used for hoisting the prefabricated staircase 2, the prefabricated staircase 2 is usually kept in a horizontal state during suspension, so that the prefabricated staircase 2 is not required to be pressed down by taking great effort when the prefabricated staircase 2 is hoisted to a mounting point for installation, or the posture of the prefabricated staircase 2 is adjusted, and the labor intensity of workers is reduced. And through setting up removable lug 113, make the cable 13 can be according to the needs of multiple specification prefabricated staircase 2 and roll adjustment, like this when multiple specification prefabricated staircase 2 hoists, can make cable 13 can both be the natural state of dangling, and horizontal bracket 11 is in the horizontality simultaneously, like this hang the prefabricated staircase 2 of completion back multiple specification and can both keep the horizontality, need not adjust the position appearance again during the installation.

The prefabricated staircase sling 1 with the position of the adjustable stay cable 13 can use the same prefabricated staircase sling 1 when different prefabricated staircases 2 are hoisted, thereby saving the sling cost for a construction side and saving the time for replacing the sling. During hoisting, the horizontal hoisting of the prefabricated staircase 2 can be realized by means of the prefabricated staircase hoisting tool 1, manual adjustment is not needed, and the installation of the prefabricated staircase 2 is convenient.

In some embodiments, as shown in fig. 4-6, the prefabricated staircase spreader 1 further comprises: a driving assembly 12 for driving the movable lug 113 to move. That is, movement of the movable lug 113 may be effected by the drive assembly 12 without manual adjustment. Because can the automatically regulated move lug 113 position, do not need the manual work to change cable 13, adjust cable 13, reduced the time of changing regulation cable 13, consequently, can effectively improve production efficiency, reduce the cost of labor.

Here, the driving assembly 12 has various structural forms, and in some examples, the driving assembly 12 includes a plurality of push rods, so that the occupied area on the horizontal frame 11 is small, the assembly is convenient, and various parts such as bearings or supporting seats are not required to be configured. In some examples, the drive assembly 12 includes multiple sets of lead screw-nut mechanisms so that the displacement adjustment is more accurate. In still other examples, a linear motor or the like can be used for each movable lifting lug 113, and thus the structural form of the driving assembly 12 is not limited herein.

Specifically, as shown in fig. 4, the driving assembly 12 further includes an electric cabinet 123, and the electric cabinet 123 is disposed on the horizontal frame 11 for convenient control.

Of course, in other embodiments of the present invention, the distance between the movable lifting lugs 113 can be manually adjusted, which can save the cost.

Further, in the embodiment of the present invention, the movable lifting lugs 113 may be slidably disposed along the horizontal frame 11, so that the distance between the movable lifting lugs 113 may be adjusted steplessly, and the adjustment space is large. In some examples, the horizontal frame 11 is provided with a plurality of positions, and the movable lifting lug 113 is selectively connected to each position, so that the movable lifting lug 113 can only be adjusted between the positions, and the adjustment mode is only suitable for manual adjustment.

In some embodiments, as shown in fig. 4-6, the horizontal shelf 11 comprises: two parallel arranged cross beams 111 and two parallel arranged longitudinal beams 112. Each longitudinal beam 112 is connected to two cross beams 111, so that the horizontal frame 11 has the advantages of simple structure, easy processing, light weight, small suspension load and low cost. Of course, in other embodiments, the horizontal frame 11 may not be limited to two horizontal and two vertical structures, and may be, for example, a plate-like structure or a grid-like structure.

Specifically, at least one longitudinal beam 112 slides along two cross beams 111 through a first sliding fit piece 114, and a plurality of movable lifting lugs 113 are arranged on each longitudinal beam 112. Thus, when one longitudinal beam 112 slides along the two cross beams 111, the distance between the two longitudinal beams 112 changes, so that the row distance between the two rows of movable lifting lugs 113 on the two longitudinal beams 112 changes. In some examples, the first sliding fit element 114 may be disposed on both the longitudinal beams 112, and both the longitudinal beams 112 may slide along the cross beam 111.

More specifically, at least part of the movable ear 113 is slid along the longitudinal beam 112 by means of a second sliding fit 115. Thus, in each row of the movable lifting lugs 113, the distance between two adjacent movable lifting lugs 113 is also adjustable. If the positions of the movable lifting lugs 113 in the same row are adjusted in the same range, the movable lifting lugs 113 are in the same row after adjustment, and the relative adjustment front row distance is changed.

The horizontal frame 11 and the movable lifting lug 113 are arranged in such a way that the adjustment mode is simple and controllable compared with other modes, and the implementation operation is very convenient.

Specifically, as shown in fig. 4-6, the first sliding fit piece 114 is fixedly connected to the longitudinal beams 112 and sleeved on the cross beams 111, and the first sliding fit piece 114 is sleeved on both ends of each cross beam 111 to match with the two longitudinal beams 112. That is to say, the first sliding fit piece 114 is arranged to be slid on the longitudinal beam 112, so that the structure is simple, and the cross beam 111 and the longitudinal beam 112 are not easy to separate under the condition of bearing heavy pressure, and the safety is high.

Furthermore, both ends of each longitudinal beam 112 are provided with a movable lifting lug 113, the movable lifting lugs 113 are arranged on a second sliding matching piece 115, and the second sliding matching piece 115 is sleeved outside the longitudinal beam 112. That is, the second sliding engagement piece 115 is also formed in the shape of a sliding sleeve, and the sliding sleeve is not easily detached from the longitudinal beam 112, which is highly reliable.

Advantageously, the longitudinal beam 112 is provided with a sliding rail 116, and the second sliding mating element 115 slides along the sliding rail 116.

Of course, in the embodiment of the present invention, the structures of the first sliding mating part 114 and the second sliding mating part 115 are not limited to this, for example, a guide rail may be disposed on the horizontal frame 11, and the movable lifting lug may be connected to the guide rail through a sliding block.

In some specific examples, as shown in fig. 4-6, the drive assembly 12 includes: two transverse push rods 121 and a plurality of longitudinal push rods 122, wherein the two transverse push rods 121 are respectively arranged on the two cross beams 111, and the plurality of longitudinal push rods 122 are arranged on the two longitudinal beams 112.

Two ends of each transverse push rod 121 are respectively connected with two longitudinal beams 112, when the distance between the longitudinal beams 112 needs to be adjusted, the two transverse push rods 121 can be simultaneously stretched and contracted, so that the distance between the two ends of the two longitudinal beams 112 can be adjusted simultaneously, and the phenomenon that one end is not adjusted and the other end is not adjusted to cause clamping can be avoided.

The plurality of longitudinal push rods 122 are arranged in one-to-one correspondence with the plurality of movable lifting lugs 113, so that the position of each movable lifting lug 113 on the longitudinal beam 112 is adjustable.

Advantageously, both the two transverse push rods 121 and the plurality of longitudinal push rods 122 are electric push rods, which is low in cost and easy to assemble.

In some embodiments, the prefabricated staircase spreader 1 further comprises: a displacement sensor for measuring the displacement of the movable lug 113. Therefore, the moving distance of the movable lifting lug 113 can be monitored, the adjustment precision is improved, and especially, the adjustment amplitudes of the plurality of movable lifting lugs 113 can be consistent by utilizing the displacement sensor.

Specifically, the displacement sensors are multiple and are arranged on each push rod.

In some alternative embodiments, as shown in fig. 1, a plurality of centralizing cables 16 are connected to a plurality of movable lugs 113, so that the movable lugs 113 can adjust the spacing between the pulling cables 13 when moving, and also can adjust the spacing between the lower ends of a plurality of centralizing cables 16, so that the pulling cables 13 and the centralizing cables 16 can be adjusted according to the position change of the suspension point on the prefabricated staircase 2. With the arrangement, the concentration cable 16, the inhaul cable 13 and the suspension point can be located on the same gravity line, so that balance is further kept during suspension, and suspension difficulty is reduced.

Specifically, as shown in fig. 5 and 6, the second sliding engagement piece 115 is integrally formed as a square frame conforming to the cross-sectional shape of the longitudinal beam 112, and the top of the square frame is provided with an ear plate for connecting with the concentration cable 16, and the bottom of the square frame is provided with an ear plate for connecting with the stay cable 13. The two ear plates form a movable ear 113.

In some examples, the partial centralizing cables 16 are connected with the movable lifting lugs 113, and the partial centralizing cables 16 are directly fixed on the cross beams or the longitudinal beams, which is not limited here.

In some embodiments, at least a portion of the cables 13 have a vertical telescoping rod 131 thereon. The arrangement is that the plurality of guys 13 can move and adjust in XY two directions on the horizontal plane, and at least part of the guys 13 can also adjust in length. Therefore, the prefabricated staircase lifting tool 1 can meet the lifting requirements of prefabricated staircases 2 of more specifications on the premise of not replacing the stay cable 13.

It can be understood that the different prefabricated staircases 2 may also be accompanied by the change of the relative heights of the suspension points due to the change of the positions of the suspension points, or the distances of all suspension points relative to the horizontal shelf 11 may also be changed. At this time, the length of the inhaul cable 13 is partially or completely adjustable, so that the change requirement can be met.

By means of the design, the front and rear suspension points are horizontal when the prefabricated staircase 2 is lifted, the stress direction of the suspension points is vertical and upward, and no horizontal component force exists. The whole process is realized by mechanical control, manpower consumption is not needed, and the practicability is high.

The length of the vertical telescopic rod 131 can be manually adjusted by a worker, and the vertical telescopic rod 131 can be set to be an electric push rod and the length can be controlled by electric control.

In some embodiments, as shown in fig. 1-3, the plurality of centralizing cables 16 and at least a part of the pulling cables 13 are provided with a length fine-tuning structure 15, so that the lengths of the centralizing cables 16 and the pulling cables 13 can be adjusted towards a direction beneficial to maintaining the overall balance through the length fine-tuning, and the adaptability of the prefabricated staircase sling 1 on prefabricated staircases 2 of various specifications is improved.

Specifically, the length fine adjustment structure 15 includes a turn buckle sleeve 151 and a turn buckle joint 152. Therefore, the device can be adjusted in a manual rotating mode, and the adjustment operation is very convenient.

As shown in fig. 1, the length fine-tuning structure 15 includes a turn-buckle sleeve 151 and two turn-buckle joints 152, and the two turn-buckle joints 152 are connected to both ends of the turn-buckle sleeve 151, so that the turn-buckle sleeves 151 can be rotated to move the two turn-buckle joints 152 toward or away from each other, thereby adjusting the overall length.

The structure of a prefabricated staircase spreader 1 according to one embodiment will now be described with reference to fig. 1.

The prefabricated staircase lifting appliance 1 has the function of automatically adjusting lifting points, and can lift prefabricated staircases 2 of various specifications and different embedded lifting points.

The prefabricated staircase sling 1 comprises a top part 14, four centralizing cables 16, a horizontal frame 11 and four inhaul cables 14 which are arranged from top to bottom. Wherein, the top part 14 is a hanging ring, the top ends of four concentration cables 16 are connected with the hanging ring, and the bottom ends of the four concentration cables 16 are connected on the horizontal frame 11. The horizontal frame 11 is generally a frame structure with two transverse and two longitudinal directions, movable lifting lugs 113 are respectively arranged on four corners of the horizontal frame 11, the bottom ends of four concentration cables 16 are connected to the four movable lifting lugs 113, and the top ends of the four cables 14 are connected to the four movable lifting lugs 113. Wherein each of the concentration cables 16 includes a pressed wire rope 161, a basket bolt sleeve 151, a basket bolt adapter 152, and a hook 162. The whole prefabricated staircase hanger 1 is hung on a lifting hook of a crane through the hanging ring 14, four pressed steel wire ropes 161 with the same length are hung below the hanging ring 14, and the pressed steel wire ropes 161 are connected with the basket bolt joint 152. The length of the centralizing cable 16 can be fine tuned by adjusting the turn-bolt joint 152 to ensure that the eye 14 is centered. Another bolt-and-socket joint 152 is suspended from the movable ear 113 by a hook 162.

Below the horizontal frame 11, the two guy cables 13 at the front end respectively include a shackle 133 and a flat mouth hook 132, and the two guy cables 13 at the rear end respectively include a vertical telescopic rod 131, a turn-buckle sleeve 151, a turn-buckle joint 152, a shackle 133 and a flat mouth hook 132. The two mounting surfaces of the prefabricated staircase 2 can be ensured to be horizontal by adjusting the turn buckle sleeve 151.

The horizontal frame 11 comprises two cross beams 111, two longitudinal beams 112, four movable lifting lugs 113, four sliding rails 116, a first sliding matching part 114 and a second sliding matching part 115, and a transverse push rod 121, a longitudinal push rod 122 and an electric cabinet 123 are arranged on the horizontal frame 11.

The sliding rail 116 is welded on the longitudinal beam 112, the second sliding matching piece 115 sheathes the sliding rail 116 and the longitudinal beam 112, and the movable lifting lug 113 can slide on the sliding rail 116. The first sliding fit 114 is welded to the longitudinal beam 112, and the transverse beam 111 can slide in the first sliding fit 114. The longitudinal distance between the movable lifting lugs 113 can be adjusted by controlling the extension and contraction of the longitudinal push rod 122 to push the movable lifting lugs 113, and the transverse distance between the movable lifting lugs 113 can be adjusted by adjusting the transverse push rod 121. And a displacement sensor is added on each push rod, so that the position of each movable lifting lug 113 can be accurately adjusted.

In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A prefabricated staircase sling, comprising:

the movable lifting lugs are arranged in multiple rows and multiple columns, the distance between the movable lifting lugs in the same row is adjustable, and the distance between the movable lifting lugs in the same column is adjustable;

the top ends of the pull cables are respectively connected to the movable lifting lugs, and the bottom ends of the pull cables are used for being connected with the prefabricated staircase;

a top piece located above the horizontal shelf;

the bottom ends of the plurality of concentrated cables are dispersedly connected to the horizontal frame, and the upper ends of the plurality of concentrated cables are connected to the top part.

2. The prefabricated staircase spreader of claim 1, wherein the horizontal shelf comprises:

two parallel beams;

the movable lifting lug comprises two longitudinal beams arranged in parallel, wherein each longitudinal beam is connected to two cross beams, at least one longitudinal beam slides along the two cross beams through a first sliding matching piece, a plurality of movable lifting lugs are arranged on the two longitudinal beams, and at least part of the movable lifting lugs slide along the longitudinal beams through a second sliding matching piece.

3. The prefabricated staircase sling according to claim 2, wherein the first sliding engagement member is fixedly connected to the longitudinal beams and externally sleeved on the cross beams, and the first sliding engagement member is sleeved on both ends of each cross beam to be engaged with both of the longitudinal beams.

4. The prefabricated staircase spreader of claim 2, wherein each of the longitudinal beams has one of the movable lifting lugs at each end thereof, the movable lifting lug being provided on the second sliding fit member, the second sliding fit member being externally fitted over the longitudinal beam.

5. The prefabricated staircase spreader of any of claims 2-4, further comprising: a drive assembly for driving the movable lug to move.

6. The prefabricated staircase spreader of claim 5, wherein the drive assembly comprises:

the two transverse push rods are respectively arranged on the two cross beams, and two ends of each transverse push rod are respectively connected with the two longitudinal beams;

the plurality of longitudinal push rods are arranged on the two longitudinal beams, and the plurality of longitudinal push rods and the plurality of movable lifting lugs are arranged in a one-to-one correspondence mode.

7. The prefabricated staircase spreader of claim 1, wherein a plurality of said centralizing cables are connected to a plurality of said movable ears.

8. The prefabricated staircase spreader of claim 1, wherein at least some of the pull lines have vertically telescoping rods thereon.

9. The prefabricated staircase spreader of claim 1, wherein a plurality of the focus cables and at least some of the tension cables have a length fine-tuning structure thereon.

10. The prefabricated staircase spreader of claim 5, further comprising: a displacement sensor for measuring the displacement of the movable lifting lug.