A construction hoisting device for steel bar truss floor deck

Abstract

The present invention belongs to the technical field of construction hoisting tools, and specifically discloses a construction hoisting device for a steel bar truss floor slab, which includes a scissor lift platform. A cuboid frame is closely arranged on the upper side of the scissor lift platform. A synchronous adjustment and fixed-length mechanism is arranged inside the inner side of the horizontal long edge on the upper side of the cuboid frame. A chain drive mechanism is arranged at one horizontal end of the cuboid frame. A pressing and positioning mechanism is arranged inside the inner side of the horizontal long edge on the lower side of the cuboid frame. A labor-saving dragging mechanism is arranged in the middle of the scissor lift platform. An electromagnetic unlocking mechanism is arranged on the upper part of the scissor lift platform. A lifting mechanism is arranged at the upper end of the cuboid frame. C-shaped rods are horizontally and arrayedly fixed between the two horizontal short edges on the lower side of the cuboid frame. The structure of the present invention is simple and the operation is convenient. It can safely and efficiently complete the hoisting work of steel bar truss floor slabs of different specifications, avoid hoisting inclination and deformation, has strong applicability and simplifies the loading and unloading process.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction hoists, and specifically refers to a construction hoisting device for a steel bar truss floor deck. Background Art

[0002] As a new type of floor structure material, steel truss floor decking has been increasingly widely used in construction projects in recent years. It has significant advantages. Compared with traditional cast-in-place floor slabs, steel truss floor decking can be directly laid on the beam and subsequently poured without the need for formwork, which greatly shortens the construction period. Steel truss floor decking is welded from steel bars and thin steel plates, with a light weight, which can effectively reduce the overall load of the building. The steel truss floor decking has a reasonable structure and high bearing capacity, which can meet the use requirements of most buildings. However, there are some problems with the existing hoists used for the construction and hoisting of steel truss floor decking.

[0003] The width of steel truss floor deck is generally fixed at about 1.2 meters, and the length varies from several meters to more than ten meters depending on the building structure. Due to its limited rigidity, ordinary hoists can easily cause the floor deck to bend and deform in the length direction during hoisting, especially for long floor decks. At the same time, the binding edges are prone to warping, affecting the construction quality and efficiency.

[0004] Existing lifting equipment for steel truss floor decking mainly uses steel wire ropes or nylon slings to directly lift after bundling. Due to the different lengths and specifications of floor decking and the difficulty in accurately controlling the bundling points, the floor decking may easily sink, tilt or even shake during the lifting process, posing a safety hazard and requiring multiple adjustments, which greatly reduces the lifting efficiency.

[0005] At present, there is a lack of universal lifting equipment for steel truss floor decking of different specifications in the market. Some construction units will customize lifting equipment according to the size of the floor decking, but the cost is high and the versatility is poor.

[0006] Reinforced truss floor decking is generally prefabricated in the factory and then transported to the construction site. The existing loading and unloading method requires that the floor decking be manually unloaded from the transport vehicle to the ground, and then bundled and hoisted, which increases the labor intensity of the construction workers and adds an extra process, reducing construction efficiency. Summary of the invention

[0007] In view of the above situation, the present invention provides a construction hoisting device for steel truss floor decking. The device has a simple structure and is easy to operate. It can safely and efficiently complete the hoisting work of steel truss floor decking of different specifications, avoid hoisting tilt and deformation, has strong applicability and simplifies the loading and unloading process.

[0008] The technical solution adopted by the present invention is as follows: The present invention provides a construction hoisting device for a steel bar truss floor slab, including a scissor lift platform. A cuboid frame is closely arranged on the upper side of the scissor lift platform. A synchronous adjustment and fixed-length mechanism is arranged inside the inner side of the horizontal long edges on the upper side of the cuboid frame. A chain drive mechanism is arranged at one horizontal end of the cuboid frame. A pressing and positioning mechanism is arranged inside the inner side of the horizontal long edges on the lower side of the cuboid frame. A labor-saving dragging mechanism is arranged in the middle of the scissor lift platform. An electromagnetic unlocking mechanism is arranged on the upper part of the scissor lift platform. A hoisting mechanism is arranged at the upper end of the cuboid frame. C-shaped rods are horizontally and arrayedly fixed between the two horizontal short edges on the lower side of the cuboid frame.

[0009] Further, the synchronous adjustment and fixed-length mechanism includes a chute and a baffle. The chute is horizontally opened on the inner sides of the two horizontal long edges on the upper side of the cuboid frame. A screw rod is horizontally arranged in the chute. Both ends of the screw rod are rotatably connected to the horizontal short edges on the upper side of the cuboid frame. A slider is horizontally slidably arranged in the chute. The slider is threadedly connected to the screw rod. The threads on the screw rod are distributed in opposite directions on both sides of the central plane of the screw rod. The sliders are symmetrically arranged on both sides of the central plane of each screw rod. The baffle is arranged on the inner side of the horizontal long edge of the cuboid frame to realize the restraint in the length direction of the steel bar truss floor slab. Symmetrically fixed shafts are arranged on both sides of the upper end of the baffle. The shafts are perpendicular to the screw rod. The slider is provided with a hole groove at the position pointed by the shaft. The shaft is coaxially and closely arranged in the hole groove.

[0010] Further, the pressing and positioning mechanism includes a fixed seat, a fixed groove and a bolt. The fixed seats are symmetrically fixed and vertically arranged at positions close to the edges at the lower end of the baffle. The bolts are vertically arranged inside the fixed seats. The inner section of the bolt is a threaded section. The threaded section of the bolt is threadedly connected to the fixed seat. The outer section of the bolt is a smooth section. The fixed groove is horizontally opened on the inner sides of the two horizontal long edges on the lower side of the cuboid frame. When the baffle is in a vertical state, the smooth section of the bolt faces the fixed groove. During the threaded movement of the bolt and the fixed seat, the smooth section of the bolt enters the fixed groove from the outside and closely adheres to it.

[0011] Further, the chain drive mechanism includes a first sprocket. The first sprocket is arranged on the outside of one of the horizontal short edges on the upper side of the cuboid frame. Three first sprockets are arranged at the same horizontal height. The two first sprockets on both sides are respectively coaxially and fixedly connected to one end of the two screw rods. The middle first sprocket is rotatably connected to the horizontal short edge on the upper side of the cuboid frame. A second sprocket is coaxially and fixedly arranged on one side of the middle first sprocket. A third sprocket is arranged directly below the second sprocket. The third sprocket is rotatably connected to the horizontal short edge on the lower side of the cuboid frame. A first chain is cooperatively connected to the outside of the three first sprockets. A second chain is cooperatively connected to the outside of the second sprocket and the third sprocket. A first rocker is coaxially engaged and inserted on one side of the third sprocket.

[0012] Furthermore, the scissor lift platform is driven to lift by a hand rocker screw, and the nut rod of the scissor lift platform is fixedly arranged in the middle of the scissor structure.

[0013] Furthermore, the labor-saving dragging mechanism includes a winding roller, a guide groove, a guiding hole and rollers. The winding roller vertically penetrates and is arranged on the nut rod of the scissor lift platform. One end of the winding roller is fixedly provided with a second rocker. A traction rope is wound on the winding roller. One end of the traction rope passes through the gap in the middle of the scissor structure of the scissor lift platform and is fixedly provided with a hook for hooking the steel bars of the steel bar truss floor formwork. The guide groove is贯穿 opened on the upper side of the middle C-shaped rod. The guide groove is close to the chain drive mechanism. A guide wheel is arranged in the guide groove to guide the traction rope. The guide wheel is rotatably connected to the adjacent C-shaped rod. The guiding hole is贯穿 opened on the lower side of the middle part of the baffle close to the chain drive mechanism. The hook can pass through the guide groove and the guiding hole. The rollers are arranged in an array along the length direction of each C-shaped rod. The rollers are rotatably connected to the C-shaped rod to reduce the moving friction of the steel bar truss floor formwork.

[0014] Furthermore, the electromagnetic unlocking mechanism includes an electromagnet, a power supply driving module and a switch. The electromagnets are symmetrically and fixedly arranged on both sides of the workbench of the scissor lift platform. The upper end of the electromagnet is higher than the upper end of the workbench of the scissor lift platform. The inner side spacing between the two electromagnets is equal to the overall width of the cuboid frame to magnetically fix the cuboid frame. The power supply driving module and the switch are fixedly arranged on the lower side of the workbench of the scissor lift platform to drive and switch the electromagnet.

[0015] Furthermore, the lifting mechanism includes a lifting ring. The lifting ring is fixedly arranged on the upper side surface of the upper horizontal long edge of the cuboid frame. The lifting rings are symmetrically arranged in two on each upper horizontal long edge on the upper side of the cuboid frame. A lifting rope is connected to the lifting ring through a hook. The cuboid frame is lifted at four points through the lifting rope to enhance the stability of lifting.

[0016] Furthermore, fixing rods are vertically and arrayedly fixed between the horizontal long edges on the same side of the cuboid frame to achieve the structural stability of the cuboid frame. The inner side spacing between the opposite fixing rods on both sides is equal to the factory-fixed width of the steel bar truss floor formwork to achieve the lateral restraint of the steel bar truss floor formwork. A counterweight is fixedly arranged on the upper side of the end of the cuboid frame far from the chain drive mechanism to balance the weight of all components on the cuboid frame. The opening surface of the C-shaped rod faces downward. The lower side surfaces of the rollers and the guide wheels are both higher than the opening surface of the C-shaped rod, so that the cuboid frame can be placed flat on the ground. The upper side surfaces of the rollers and the guide wheels are both higher than the upper side surface of the C-shaped rod. The upper side surface of the roller is flush with the upper side surface of the lower short edge of the cuboid frame to achieve the horizontal and quick dragging of the steel bar truss floor formwork.

[0017] Further, length scale values are marked on the outer sides of the horizontal long edges on the upper side of the cuboid frame, which can determine the moving position of the baffle plate.

[0018] The beneficial effects achieved by the present invention with the above structure are as follows:

[0019] (1) By arranging the U-shaped rods and rollers on the lower side of the cuboid frame to contact the lower surface of the steel bar truss floor slab, the stress points during the hoisting process are dispersed along the entire length direction of the floor slab, rather than the traditional edge bundling points. Due to the supporting effect of the U-shaped rods and rollers, the hoisting load is effectively dispersed, avoiding the bending deformation of the floor slab caused by its own weight and hoisting force. At the same time, the fixed rods on both sides of the cuboid frame play a lateral restraint role on the steel bar truss floor slab, avoiding the lateral warping caused by traditional bundling points, ensuring the safety of the floor slab, and improving the construction quality.

[0020] (2) The present invention utilizes the synchronous adjustment fixed-length mechanism to ensure that the two baffle plates always move symmetrically with respect to the central plane of the cuboid frame. This mechanism, through the chutes, sliders and screws arranged on the horizontal long edges on both sides of the cuboid frame, and the symmetrically and oppositely distributed threads on the screws, enables the two sliders to perform synchronous symmetric movements when the first rocker is rotated, thereby controlling the symmetric movement of the baffle plates, accurately positioning steel bar truss floor slabs of different lengths. This synchronous adjustment method ensures that the center of gravity of the floor slab within the cuboid frame always lies on the center line, avoiding the uneven settlement, side tilt and sway caused by eccentricity, ensuring the smoothness and safety of the hoisting process. The distance between the baffle plates can be adjusted according to the actual length of the floor slab through the synchronous adjustment fixed-length mechanism, which is applicable to steel bar truss floor slabs of different lengths, improving the applicability of the device.

[0021] (3) The present invention lifts the cuboid frame to a height corresponding to the steel bar truss floor slab on the transport vehicle through the scissor lift platform, then drags the floor slab into the cuboid frame through the labor-saving dragging mechanism, and fixes it through the baffle plate and the pressing and positioning mechanism. There is no need to unload the floor slab to the ground, nor to perform traditional bundling operations, but directly hoist it. This design effectively simplifies the loading and unloading process, reduces the labor cost and construction time, and significantly improves the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 FIG. 1 is a schematic three-dimensional structure diagram of a construction hoisting device for a steel bar truss floor slab proposed by the present invention.

[0023] Figure 2 FIG. 2 is an exploded structure diagram of a construction hoisting device for a steel bar truss floor slab proposed by the present invention.

[0024] Figure 3Schematic diagram of the positional relationship between the winding roller and the scissor lift platform of a construction hoisting device for a steel bar truss floor slab proposed by the present invention.

[0025] Figure 4 Schematic diagram of the positional relationship between the cuboid frame and the baffle of a construction hoisting device for a steel bar truss floor slab proposed by the present invention.

[0026] Figure 5 For Figure 1 Enlarged view of part A in

[0027] Figure 6 For Figure 1 Enlarged view of part B in

[0028] Figure 7 Exploded structural schematic diagram of the positional relationship between the slider and the screw rod of a construction hoisting device for a steel bar truss floor slab proposed by the present invention.

[0029] Figure 8 For Figure 4 Enlarged view of part C in

[0030] Fig. 9 Schematic diagram of the screw rod of a construction hoisting device for a steel bar truss floor slab proposed by the present invention.

[0031] Wherein, 1. Scissor lift platform; 2. Cuboid frame, 21. C-shaped rod, 22. Fixed rod, 23. Counterweight; 3. Synchronous adjustment and constant length mechanism, 31. Chute, 32. Screw rod, 33. Slider, 34. Baffle, 35. Hole groove, 36. Rotating shaft; 4. Chain drive mechanism, 41. First sprocket, 42. Second sprocket, 43. Third sprocket, 44. First chain, 45. Second chain, 46. First rocker; 5. Pressing and positioning mechanism, 51. Fixed seat, 52. Bolt, 53. Fixed groove; 6. Labor-saving dragging mechanism, 61. Winding roller, 62. Second rocker, 63. Traction rope, 64. Hook, 65. Guide groove, 66. Guide wheel, 67. Guide hole, 68. Roller; 7. Electromagnetic unlocking mechanism, 71. Electromagnet, 72. Power drive module, 73. Switch; 8. Lifting mechanism, 81. Hoisting ring, 82. Hoisting rope.

[0032] The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0035] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Fig. 9 As shown in

[0036] Among them, the synchronous adjustment and fixed length mechanism 3 includes a slide groove 31 and a baffle 34. The slide groove 31 is horizontally opened on the inner side of the two horizontal long edges on the upper side of the rectangular frame 2. A screw rod 32 is horizontally arranged in the slide groove 31. Both ends of the screw rod 32 are rotatably connected to the horizontal short edges on the upper side of the rectangular frame 2. A slider 33 is horizontally slidably arranged in the slide groove 31. The slider 33 is threadedly connected to the screw rod 32. The threads on the screw rod 32 are distributed in opposite directions on both sides of the center plane of the screw rod 32. The slider 33 is symmetrically arranged on both sides of the center plane of each screw rod 32. The baffle 34 is arranged on the inner side of the horizontal long edges of the rectangular frame 2. A rotating shaft 36 is symmetrically fixed on both sides of the upper end of the baffle 34. The rotating shaft 36 is perpendicular to the screw rod 32. The slider 33 is opened with a hole groove 35 at the position where the rotating shaft 36 points, and the rotating shaft 36 is coaxially and tightly arranged in the hole groove 35. The clamping and positioning mechanism 5 includes a fixing seat 51, a fixing groove 53 and a bolt 52. The fixing seat 51 is symmetrically fixed and vertically arranged at the lower end of the baffle 34 near the edge. The bolt 52 is vertically arranged on the inner side of the fixing seat 51. The inner section of the bolt 52 is a threaded section, and the threaded section of the bolt 52 is threadedly connected to the fixing seat 51. The outer section of the bolt 52 is a smooth section. The fixing groove 53 is horizontally opened on the inner side of the two horizontal long edges on the lower side of the rectangular frame 2. When the baffle 34 is in a vertical state, the smooth section of the bolt 52 is opposite to the fixing groove 53. During the threaded movement of the bolt 52 and the fixing seat 51, the smooth section of the bolt 52 tightly enters the fixing groove 53 from the outside.

[0037] Among them, the chain drive mechanism 4 includes a first sprocket 41, the first sprocket 41 is arranged on the outside of one of the horizontal short edges on the upper side of the rectangular frame 2, and three first sprockets 41 are arranged at the same horizontal height. The two first sprockets 41 on both sides are coaxially fixedly connected to one end of the two screws 32 respectively, and the middle first sprocket 41 is rotatably connected to the horizontal short edge on the upper side of the rectangular frame 2. A second sprocket 42 is coaxially fixedly arranged on one side of the middle first sprocket 41, and a third sprocket 43 is arranged directly below the second sprocket 42. The third sprocket 43 is rotatably connected to the horizontal short edge on the lower side of the rectangular frame 2, and the outer sides of the three first sprockets 41 are matched with the first chain 44, and the outer sides of the second sprocket 42 and the third sprocket 43 are matched with the second chain 45, and one side of the third sprocket 43 is coaxially engaged with the first rocker 46. The scissors-type lifting platform 1 adopts a hand rocker threaded drive for lifting, and the nut rod of the scissors-type lifting platform 1 is fixedly arranged in the middle part of the scissors structure.

[0038] Among them, the labor-saving dragging mechanism 6 includes a winding roller 61, a guide groove 65, a guiding hole 67 and a roller 68. The winding roller 61 vertically penetrates and is arranged on the nut rod of the scissor lift platform 1. One end of the winding roller 61 is fixedly provided with a second rocker 62. A traction rope 63 is wound on the winding roller 61. One end of the traction rope 63 passes through the gap in the middle of the scissor structure of the scissor lift platform 1 and is fixedly provided with a hook 64. The guide groove 65 is vertically opened on the upper side of the middle U-shaped rod 21. The guide groove 65 is close to the chain drive mechanism 4. A guide wheel 66 is arranged in the guide groove 65. The guide wheel 66 is rotatably connected to the adjacent U-shaped rod 21. The guiding hole 67 is vertically opened on the lower side of the middle of the baffle 34 close to the chain drive mechanism 4. The hook 64 can pass through the guide groove 65 and the guiding hole 67. The rollers 68 are arranged in an array along the length direction of each U-shaped rod 21 on the U-shaped rod 21. The rollers 68 are rotatably connected to the U-shaped rod 21. The electromagnetic unlocking mechanism 7 includes an electromagnet 71, a power supply driving module 72 and a switch 73. The electromagnets 71 are symmetrically and fixedly arranged on both sides of the workbench of the scissor lift platform 1. The upper end of the electromagnet 71 is higher than the upper end of the workbench of the scissor lift platform 1. The inner side spacing of the two electromagnets 71 is equal to the overall width of the cuboid frame 2. The power supply driving module 72 and the switch 73 are fixedly arranged on the lower side of the workbench of the scissor lift platform 1.

[0039] Among them, the lifting mechanism 8 includes a lifting ring 81. The lifting ring 81 is fixedly arranged on the upper side surface of the upper horizontal long edge of the cuboid frame 2. The lifting rings 81 are symmetrically arranged in two on each upper horizontal long edge of the upper side of the cuboid frame 2. A lifting rope 82 is connected to the lifting ring 81 through a hook. The cuboid frame 2 realizes four-point lifting through the lifting rope 82. Fixed rods 22 are vertically and arrayedly fixed between the horizontal long edges on the same side of the cuboid frame 2. The inner side spacing between the two opposite fixed rods 22 on both sides is equal to the factory-fixed width of the steel bar truss floor formwork. A counterweight 23 is fixedly arranged on the upper side of one end of the cuboid frame 2 away from the chain drive mechanism 4. The opening surface of the U-shaped rod 21 faces downward. The lower side surfaces of the rollers 68 and the guide wheel 66 are both higher than the opening surface of the U-shaped rod 21. The upper side surfaces of the rollers 68 and the guide wheel 66 are both higher than the upper side surface of the U-shaped rod 21. The upper side surface of the roller 68 is flush with the upper side surface of the lower short edge of the cuboid frame 2. Length scale values are marked on the outer sides of the upper horizontal long edges of the upper side of the cuboid frame 2.

[0040] When in use, the device is pushed to the side of the vehicle equipped with the steel truss floor deck through the wheels arranged on the scissor-type lifting platform 1. Generally, the steel truss floor decks shipped from the factory are combined in multiple layers. The rectangular frame 2 is facing the length direction of the steel truss floor deck, the inner side of the fixing rod 22 is aligned with the width sides of the steel truss floor deck, and the chain drive mechanism 4 is facing away from the steel truss floor deck. The scissor-type lifting platform 1 is started to be lifted and lowered by the rocker so that the lower side of the steel truss floor deck to be hoisted is flush with the upper side of the short edge of the lower side of the rectangular frame 2, and then the position of the baffle 34 is adjusted. The two baffles 34 are symmetrically distributed along the center plane of the length direction of the rectangular frame 2. At this time, ensure that the smooth section of the bolt 52 is located outside the fixing groove 53, insert the first rocker 46 into the third sprocket 43, and shake. The first rocker 46 drives the third sprocket 43 and then drives the second sprocket 42 and the first sprocket 41 to rotate in the same direction. Due to the symmetrical and reverse setting of the threads on the screw 32, the two sliders 33 located on one side of the center plane of the rectangular frame 2 and the two sliders 33 located on the other side of the center plane of the rectangular frame 2 move synchronously and symmetrically. Therefore, the baffle 34 performs the same follow-up movement, so that the baffle 34 is always symmetrical on both sides of the center plane of the rectangular frame 2. The width of the steel truss floor decking is fixed at 1.2m, and the length varies according to the actual building structure. The position of the baffle 34 is adjusted according to the length of this batch of steel truss floor decking and the scale of the horizontal long edge on the upper side of the rectangular frame 2, so that the distance between the two baffles 34 is equal to the length of the steel truss floor decking, and then the first rocker 46 is removed, and the slider 33 is self-locking through a threaded connection.

[0041] The upper end of the baffle plate 34 has been positioned by the slider 33, so the baffle plate 34 will not rotate under the limit of the fixing groove 53, so that the baffle plate 34 is fixed. After the hook 64 is extended, it passes through the guide groove 65 and the guide hole 67 in sequence. After the other baffle plate 34 is lifted, the hook 64 is hung on the appropriate steel bar position at the front end of the steel truss floor deck that needs to be hoisted, and then the switch 73 is turned on to turn on the electromagnet 71 to achieve magnetic fixation of the rectangular frame 2. After the scissor-type lifting platform 1 is fixed and the baffle plate 34 that is not completely fixed is lifted, the second rocker 62 is shaken to drag the steel truss floor deck through the traction rope 63. This group of steel truss floor decks is tightly inserted into the rectangular frame 2 and the lower side is aligned with the roller 68. After the lifting device is lifted to the top of the building, a baffle 34 is released, and the steel truss floor deck is dragged out from one side of the cuboid frame 2 along the roller 68, and then the cuboid frame 2 is lifted back to the scissor lift platform 1 for the next lifting.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

[0044] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A construction hoisting device for a steel truss floor deck, comprising a scissor-type lifting platform (1), characterized in that: A cuboid frame (2) is closely arranged on the upper side of the scissor lift platform (1). A synchronous adjustment and fixed-length mechanism (3) is arranged inside the inner side of the horizontal long edges on the upper side of the cuboid frame (2). A chain drive mechanism (4) is arranged at one horizontal end of the cuboid frame (2). A pressing and positioning mechanism (5) is arranged inside the inner side of the horizontal long edges on the lower side of the cuboid frame (2). A labor-saving dragging mechanism (6) is arranged in the middle of the scissor lift platform (1). An electromagnetic unlocking mechanism (7) is arranged on the upper part of the scissor lift platform (1). A lifting mechanism (8) is arranged at the upper end of the cuboid frame (2). C-shaped rods (21) are horizontally and arrayedly fixed between the two horizontal short edges on the lower side of the cuboid frame (2); The synchronous adjustment and fixed-length mechanism (3) includes a chute (31) and a baffle (34). The chute (31) is horizontally arranged inside the inner sides of the two horizontal long edges on the upper side of the cuboid frame (2). A screw rod (32) is horizontally arranged inside the chute (31). Both ends of the screw rod (32) are rotatably connected to the horizontal short edges on the upper side of the cuboid frame (2). A slider (33) is horizontally slidably arranged inside the chute (31). The slider (33) is threadedly connected to the screw rod (32). The threads on the screw rod (32) are distributed in opposite directions on both sides of the central plane of the screw rod (32). The sliders (33) are symmetrically arranged on both sides of the central plane of each screw rod (32). The baffle (34) is arranged inside the horizontal long edge of the cuboid frame (2). Symmetrically fixed shafts (36) are arranged at both sides of the upper end of the baffle (34). The shafts (36) are perpendicular to the screw rod (32). The sliders (33) are provided with hole slots (35) at the positions pointed by the shafts (36). The shafts (36) are coaxially and closely arranged inside the hole slots (35); The pressing and positioning mechanism (5) includes a fixed seat (51), a fixed slot (53) and a bolt (52). The fixed seats (51) are symmetrically fixed and vertically arranged at positions close to the edges at the lower ends of the baffles (34). The bolts (52) are vertically arranged inside the fixed seats (51). The inner section of the bolt (52) is a threaded section. The threaded section of the bolt (52) is threadedly connected to the fixed seat (51). The outer section of the bolt (52) is a smooth section. The fixed slot (53) is horizontally arranged inside the inner sides of the two horizontal long edges on the lower side of the cuboid frame (2). When the baffle (34) is in a vertical state, the smooth section of the bolt (52) faces the fixed slot (53). During the threaded movement of the bolt (52) and the fixed seat (51), the smooth section of the bolt (52) enters the fixed slot (53) from the outside and closely fits; The chain drive mechanism (4) includes a first sprocket (41). The first sprocket (41) is arranged on the outer side of one of the horizontal short edges on the upper side of the cuboid frame (2). Three first sprockets (41) are arranged at the same horizontal height. The two first sprockets (41) on both sides are respectively coaxially and fixedly connected to one end of two screw rods (32). The middle first sprocket (41) is rotationally connected to the horizontal short edge on the upper side of the cuboid frame (2). A second sprocket (42) is coaxially and fixedly arranged on one side of the middle first sprocket (41). A third sprocket (43) is arranged directly below the second sprocket (42). The third sprocket (43) is rotationally connected to the horizontal short edge on the lower side of the cuboid frame (2). A first chain (44) is cooperatively connected to the outer sides of the three first sprockets (41). A second chain (45) is cooperatively connected to the outer sides of the second sprocket (42) and the third sprocket (43). A first rocker (46) is coaxially engaged and inserted on one side of the third sprocket (43); The scissor lift platform (1) is driven to lift by a hand rocker thread. The nut rod of the scissor lift platform (1) is fixedly arranged in the middle of the scissor structure; The labor-saving dragging mechanism (6) includes a winding roller (61), a guide groove (65), a guiding hole (67) and a roller (68). The winding roller (61) vertically penetrates and is arranged on the nut rod of the scissor lift platform (1). A second rocker (62) is fixedly arranged at one end of the winding roller (61). A towing rope (63) is wound on the winding roller (61). One end of the towing rope (63) passes through the gap in the middle of the scissor structure of the scissor lift platform (1) and is fixedly provided with a hook (64). The guide groove (65) is贯穿 opened on the upper side of the middle C-shaped rod (21). The guide groove (65) is close to the chain drive mechanism (4). A guide wheel (66) is arranged in the guide groove (65). The guide wheel (66) is rotationally connected to the adjacent C-shaped rod (21). The guiding hole (67) is贯穿 opened on the lower side of the middle part of the baffle (34) close to the chain drive mechanism (4). The hook (64) can pass through the guide groove (65) and the guiding hole (67). The rollers (68) are arranged in an array along the length direction of the C-shaped rod (21) on each C-shaped rod (21). The rollers (68) are rotationally connected to the C-shaped rod (21); The electromagnetic unlocking mechanism (7) includes an electromagnet (71), a power supply drive module (72) and a switch (73). The electromagnets (71) are symmetrically and fixedly arranged on both sides of the workbench of the scissor lift platform (1). The upper ends of the electromagnets (71) are higher than the upper end of the workbench of the scissor lift platform (1). The inner side spacing of the two electromagnets (71) is equal to the overall width of the cuboid frame (2). The power supply drive module (72) and the switch (73) are fixedly arranged on the lower side of the workbench of the scissor lift platform (1).

2. The construction hoisting device for a steel bar truss floor deck according to claim 1 is characterized in that: The lifting mechanism (8) includes a lifting ring (81), and the lifting ring (81) is fixedly arranged on the upper side surface of the horizontal long edge on the upper side of the cuboid frame (2). Two lifting rings (81) are symmetrically arranged on each horizontal long edge on the upper side of the cuboid frame (2). A lifting rope (82) is connected to the lifting ring (81) through a hook, and the cuboid frame (2) is lifted at four points through the lifting rope (82).

3. The construction hoisting device for a steel bar truss floor deck according to claim 2 is characterized in that: Fixing rods (22) are vertically and arrayedly fixed between the horizontal long edges on the same side of the cuboid frame (2). The inner distance between the fixing rods (22) on both opposite sides is equal to the factory-fixed width of the steel bar truss floor formwork. A counterweight (23) is fixedly arranged on the upper side of the end of the cuboid frame (2) far from the chain drive mechanism (4). The opening surface of the U-shaped rod (21) faces downward. The lower side surfaces of the roller (68) and the guide wheel (66) are both higher than the opening surface of the U-shaped rod (21). The upper side surfaces of the roller (68) and the guide wheel (66) are both higher than the upper side surface of the U-shaped rod (21). The upper side surface of the roller (68) is flush with the upper side surface of the short edge on the lower side of the cuboid frame (2).

4. The construction hoisting device for a steel bar truss floor deck according to claim 3 is characterized in that: Length scale values are marked on the outer sides of the horizontal long edges on the upper side of the cuboid frame (2).

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