CN205713147U - A kind of quick positioning apparatus of precast floor slab - Google Patents

Abstract

A kind of quick positioning apparatus of precast floor slab of the present utility model, relates to technical field of building construction, utilizes jib crane to lift and in place for existing precast floor slab, and working performance is low, poor accuracy in place, and the problem that workmen's high-altitude working safety hidden danger is many.Positioning apparatus includes the ground rail being arranged at assembled architecture framework both sides a pair；At least one U-rail framework that can slide along ground rail, U-rail framework includes a pair vertical guide being respectively arranged on the ground rail of both sides, above assembled architecture framework and the crossbeam in place that is connected between a pair vertical guide；And at least one the horizontal sliding guide rail beam climbing support can being slidably matched with vertical guide and crossbeam in place.

Description

A fast positioning device for prefabricated floor slabs

technical field

The utility model relates to the technical field of building construction, in particular to a quick positioning device for prefabricated floor slabs in the construction process of prefabricated assembled buildings.

Background technique

Prefabricated buildings are prefabricated parts or all of the components in the factory and transported to the construction site, and the components are assembled through reliable connections. It has high production efficiency, fast construction progress, good component quality, and less on-site wet work. , and the advantages of being less restricted by climatic conditions.

In the construction process of existing prefabricated buildings, cantilever cranes are often used to hoist the prefabricated floors and put them in place, which has the following defects: 1. The cantilever cranes can only lift the prefabricated floors to the vicinity of the predetermined position, and manually push and pull the prefabricated floors to It is impossible to achieve one-time positioning at the predetermined position, the operation efficiency is low, and the positioning accuracy is poor; 2. Using the cantilever crane to hoist and transport the prefabricated floor slabs not only occupies a large area of the construction site, there are three-dimensional cross operations, but also the construction personnel work at heights Frequent, many potential safety hazards, great danger.

Contents of the invention

Aiming at the problems that the existing prefabricated floor slabs are hoisted and placed by a cantilever crane, the operation efficiency is low, the positioning accuracy is poor, and there are many safety hazards and great dangers for construction personnel working at heights, the purpose of this utility model is to provide a prefabricated floor slab The quick positioning device utilizes the sliding cooperation between the horizontal push guide rail beam climbing frame and the vertical guide rail and the positioning beam to ensure the positioning accuracy of the prefabricated floor slab, improve work efficiency, and reduce the equipment on the construction site. The large area and high-altitude operations ensure construction safety.

The utility model adopts a prefabricated floor fast positioning device to solve the technical problem, including a pair of ground rails arranged on both sides of the prefabricated building frame; at least one U-shaped rail frame that can slide along the ground rail, so that The U-shaped track frame includes a pair of vertical guide rails respectively arranged on the ground rails on both sides, a beam in place above the assembled building frame and connected between the pair of vertical guide rails; At least one horizontal push rail crossbeam climbing frame that is slidably matched with the vertical guide rail and the in-position crossbeam.

Preferably, the vertical guide rail includes a pair of columns arranged in parallel, and a cross bar connected to the top ends of the pair of columns, and the bottom ends of the columns are connected to a base provided with a set of rollers, and the base is connected to the ground Track sliding fit; the side of the column close to the prefabricated building frame is provided with several supports at intervals, the height of two adjacent supports is the height of one floor of the prefabricated building frame, and the The bit beam is movably connected with the support.

Preferably, the horizontal push guide rail beam climbing frame includes a frame body, a guide rail beam that is slidably matched with the frame body, a number of connectors fixed to the bottom of the guide rail beam for hoisting the prefabricated floor, and arranged on The driving mechanism between the vertical guide rail and the frame body; the two sides of the frame body are provided with a first slider or a first roller set, and the inner side of the column is provided with the first slider or a second roller group. A chute for sliding fit of a roller group, the driving mechanism includes a driving part and a locking mechanism, and the two ends of the driving part are respectively connected with the frame body and the vertical guide rail, which can change the frame body and the vertical guide rail. The relative positional relationship between the vertical guide rails enables the frame body to move upwards, downwards or remain stationary relative to the vertical guide rails.

Preferably, the frame body has a pair of slideways one with a C-shaped cross section, and a connecting rod is provided at the end of the slideway one away from the prefabricated building frame, so that the slideway one is connected to the The bar constitutes a U-shaped guide rail with one end closed, and the guide rail beam includes two cross bars arranged side by side. The top end of the cross bar is provided with a second slider or a second roller set. The roller set is in sliding fit with the slideway, and the bottom end of the cross bar is connected with a connecting piece for hoisting the prefabricated floor slab.

Preferably, the drive mechanism includes a support frame arranged parallel to the frame body, several vertically arranged drive cylinders and several horizontal hydraulic cylinders, one end of the drive cylinder is fixed on the support frame, and the other end is fixed On the frame body, the horizontal hydraulic cylinder capable of being stably connected to the vertical guide rail is provided on both sides of the frame body and the support frame.

Preferably, the driving mechanism includes a driving oil cylinder, a plurality of matched gears and a pair of racks, and a locking mechanism arranged between the frame body and the vertical guide rail; the pair of racks are fixed on The inner side of the vertical guide rail extends vertically. Several gears are rotatably connected to the two ends of the frame body. One end of the driving cylinder is fixed on the frame body. The fixed structure enables the frame body to climb or descend along the rack under the expansion and contraction of the driving cylinder.

Preferably, the cross-beam in place has a pair of slide rails with a C-shaped cross-section, and both ends of the cross-beam in place have notches that match with one end of the frame, when the frame climbs to When it is at the same height as the in-position beam, one end of the frame body can be engaged with the notch of the in-position beam, so that the connection between the first slideway of the frame body and the second slideway of the in-place beam smooth transition of the surface.

Preferably, it also includes a vertical positioning assembly, the vertical positioning assembly includes several wall-attached rails installed horizontally on the facade of the prefabricated building frame from bottom to top, and several wall-attached rails corresponding to the A wall-attached connector, one end of the wall-attached connector is fixedly connected to the vertical guide rail, and the other end is slidably matched with the wall-attached track through a third slider or a third roller set fixed thereon.

The effect of the utility model is that: the prefabricated floor quick positioning device of the utility model, the U-shaped track frame is enclosed on both sides and the top of the prefabricated building frame, the bottom is hoisted with the prefabricated floor horizontally pushing the guide rail and the beam climbing frame can move along the vertical Climb to a predetermined height on the guide rail (that is, the direction of the z-axis), and then move horizontally to the predetermined position along the in-place beam (that is, the direction of the y-axis), and gradually realize the positioning of the prefabricated floor slabs; since the U-shaped track frame can move along the ground track (that is, the x axis direction), so that the horizontal push guide rail beam climbing frame can drive the prefabricated floor slab to move to the predetermined position along the x-axis direction, thereby completing the rapid positioning and installation of the prefabricated floor slab in the plane where the current height xy axis is located, and then push the horizontal guide rail beam The climbing frame continues to climb up the height of one floor along the vertical guide rail, and completes the rapid positioning and installation of the prefabricated floor slabs on this floor one by one by moving horizontally along the in-place beams. In this way, the prefabricated floor slabs in the prefabricated building frame are completed layer by layer. Positioning and installation, the prefabricated floor quick positioning device, through the sliding fit between the U-shaped track frame and the ground track, and the sliding fit between the horizontal push guide rail beam climbing frame and the vertical guide rail and the positioning beam, makes the horizontal push guide rail beam climb The frame can drive the prefabricated floor to move within the three degrees of freedom of the xyz axis, thereby transporting the prefabricated floor to the predetermined position, realizing the one-time accurate positioning of the prefabricated floor, eliminating the need for manual secondary handling, reducing manpower consumption and improving construction efficiency; through The combination of horizontal push guide rail beam climbing frame and U-shaped track frame realizes the hoisting of prefabricated floor slabs, which avoids the introduction of large-scale hoisting equipment and reduces high-altitude operations. The three-dimensional intersection operation is guaranteed, and the safety of the construction is guaranteed; moreover, the rapid positioning device of the prefabricated floor slab does not need to set up scaffolding and formwork during the hoisting operation, which saves a lot of building materials and further reduces the project cost.

Description of drawings

Figures 1 to 3 are schematic diagrams of the working process of the prefabricated floor quick positioning device according to an embodiment of the present invention;

Fig. 4 is a side view from A direction of Fig. 3;

Fig. 5 is a top view of the horizontal push guide rail beam climbing frame according to an embodiment of the present invention;

Fig. 6 is a B-B sectional view of Fig. 5 .

detailed description

The following is a further detailed description of a prefabricated floor slab quick-positioning device proposed by the utility model in conjunction with the accompanying drawings and specific embodiments. According to the following description and claims, the advantages and features of the utility model will be more clear. The technical contents and features of the present utility model will be described in detail below by referring to the enumerated embodiments in conjunction with the accompanying drawings. It should be further noted that all the drawings are in very simplified form and use inaccurate scales, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present utility model. For the convenience of description, the "up" and "down" described below are consistent with the directions of up and down in the drawings, but this cannot be a limitation of the technical solution of the present utility model.

The prefabricated slab fast positioning device 100 of the present invention is described in conjunction with Fig. 1 to Fig. 6. In order to clarify the direction relationship, an xyz Cartesian coordinate system with the z-axis direction as the height extension direction of the prefabricated building frame a is set as required. It includes a pair of ground tracks 10 arranged on both sides of the prefabricated building frame a; at least one U-shaped track frame 20 that can slide along the ground track 10; A pair of vertical guide rails 21, a crossbeam 22 in place located above the prefabricated building frame a and connected between the pair of vertical guide rails 21; It is used for hoisting the climbing frame 30 of the horizontal pushing guide rail crossbeam of the prefabricated floor slab a'. The above-mentioned horizontal pushing guide rail crossbeam climbing frame 30 is connected with the power control system (not shown in the figure), and is used to control the vertical climbing and horizontal pushing movement of the horizontal pushing guide rail crossbeam climbing frame 30 along the U-shaped track frame 20, because the power control system It is not within the protection scope of the claims of the utility model, so its structure and connection relationship will not be described in detail.

In the prefabricated floor fast positioning device 100 of the present utility model, the U-shaped track frame 20 is enclosed on both sides and the top of the prefabricated building frame a, and the horizontal pushing guide rail crossbeam climbing frame 30 of the prefabricated floor a' is hoisted on the bottom, which can move vertically The guide rail 21 (that is, the direction of the z-axis) climbs to a predetermined height, and then moves horizontally to a predetermined position along the in-position beam 22 (that is, the direction of the y-axis), so that the prefabricated floor a' is gradually placed in place; since the U-shaped track frame 20 can move along the ground The track 10 (that is, the direction of the x-axis) translates, so that the horizontal push guide rail crossbeam climbing frame 30 can drive the prefabricated floor a' to move to a predetermined position along the x-axis direction, thereby completing the rapid expansion of the prefabricated floor a' in the plane where the current height xy axis is located. Positioning and installation, then, the horizontal push guide rail crossbeam climbing frame 30 continues to climb up the height of one floor along the vertical guide rail 21, and completes the rapid positioning and installation of the prefabricated floor a' of this floor successively by moving horizontally along the in place crossbeam 22 , reciprocating in this way, the positioning and installation of the prefabricated floor a' in the prefabricated building frame a is completed layer by layer, the prefabricated floor quick positioning device 100, through the sliding fit of the U-shaped track frame 20 and the ground track 10, and the horizontal push guide rail The sliding cooperation of the beam climbing frame 30 with the vertical guide rail 21 and the in-position beam 22 enables the horizontal push guide rail beam climbing frame 30 to drive the prefabricated floor a' to move within the three degrees of freedom of the xyz axis, thereby transporting the prefabricated floor a' to The prefabricated floor slab a' can be accurately positioned at one time without manual secondary handling, which reduces manpower consumption and improves construction efficiency; the prefabricated floor slab a ' The hoisting avoids the introduction of large-scale hoisting equipment and reduces high-altitude operations. The prefabricated floor quick positioning device 100 has a simple running route and a smaller footprint, avoiding three-dimensional crossing operations, and ensuring construction safety; moreover, The prefabricated floor slab quick positioning device 100 does not need to set up scaffolding and formwork during the hoisting operation, which saves a lot of building materials and further reduces the engineering cost.

As shown in Figure 4, the vertical guide rail 21 comprises a pair of columns 21a arranged in parallel, and a cross bar 21c connected to the tops of the two columns 21a. Slidingly fit with the ground track 10, so that the column 21a can slide freely along the ground track 10; the crossbar 21c can form a stable frame structure with the two columns 21a, which is more conducive to the stability of the vertical guide rail 21 structure; as shown in Figure 3 , the side of the column 21a close to the prefabricated building frame a is provided with several supports (not shown) at intervals, the height of two adjacent supports is the height of one floor of the prefabricated building frame a, and the in-situ The crossbeam 22 is movably connected with the support, and as the erection height of the prefabricated building frame a increases, the in-place crossbeam 22 can be moved up and fixed accordingly, so as to meet the hoisting height of the upper prefabricated floor a'. The above-mentioned movable connection can be clamping connection, bolt connection, etc. In this embodiment, the bolt connection is preferred, and the bolt connection has higher stability and is easy to disassemble.

As shown in Fig. 5 and Fig. 6, the horizontal pushing guide rail beam climbing frame 30 includes a frame body 31, a guide rail beam 34 slidingly matched with the frame body 31, and several connections fixed to the bottom of the guide rail beam 34 for hoisting the prefabricated floor slab a' Components, and the driving mechanism arranged between the vertical guide rail 21 and the frame body 31; the two sides of the frame body 31 are provided with a first slide block or the first roller set 32, and the inside of the column 21a is provided with the first slide block Or the chute 21b that the first roller group 32 slides and fits, the driving mechanism includes a driving part and a locking mechanism, and the two ends of the driving part are connected with the frame body 31 and the vertical guide rail 21 respectively, and it can change the frame body 31 and the vertical guide rail 21. The relative positional relationship between the guide rails 21 enables the frame body 31 to move upwards, downwards or remain stationary relative to the vertical guide rails 21 . In order to ensure that the horizontal push guide rail beam climbing frame 30 can run smoothly during the vertical transportation of the prefabricated floor a', the first slider or the first roller group 32 of the frame body is respectively arranged in the middle of the frame body 31 to ensure that the frame body 31 The force on both sides is balanced to avoid safety accidents caused by rollover during vertical transportation.

Please continue to refer to Fig. 5 and Fig. 6, the above-mentioned frame body 31 has a pair of slideways 31a that are C-shaped in section, and the guide rail crossbeam 34 includes two crossbars arranged side by side, and the top of the crossbar is provided with a second slide block or a first The second roller group 34a, the second slider or the second roller group 34a is slidably matched with the slideway one 31a, and the bottom end of the cross bar is connected with a connector for hoisting the prefabricated floor a', so as to ensure that the guide rail beam 34 will not slip out of the slide Road one 31a, one end of slideway one 31a away from the prefabricated building frame a is provided with a connecting rod 33, so that slideway one 31a and connecting rod 33 form a U-shaped guide rail with one end closed.

In the present embodiment, as shown in Figure 6, the drive mechanism (not shown) includes a support frame 35 arranged parallel to the frame body 31, several vertically arranged drive cylinders 37 and some horizontal hydraulic cylinders, the drive cylinder 37 One end is fixed on the support frame 35, and the other end is fixed on the frame body 31. The two sides of the frame body 31 and the support frame 35 are provided with a horizontal hydraulic cylinder that can be stably connected with the vertical guide rail 21, that is, one end of the horizontal hydraulic cylinder is fixed. On the side of the frame body 31 or the support frame 35, the other end of the elongated end can be abutted against the vertical guide rail 21 to realize the stable connection between the frame body 31 or the support frame 35 and the vertical guide rail 21; After the horizontal hydraulic cylinder one 36 on the frame 35 shrinks to make it break away from the vertical guide rail 21, under the telescopic action of the driving cylinder 37, the support frame 35 climbs to a predetermined position; otherwise, the horizontal hydraulic cylinder one 36 is extended to make the support frame 35 is stably connected with the vertical guide rail 21, and then, the horizontal hydraulic cylinder 2 (not shown) connected on the frame body 31 is contracted to make it break away from the vertical guide rail 21, and under the expansion and contraction of the drive cylinder 37, the The frame body 31 climbs up to a predetermined position; on the contrary, extending the horizontal hydraulic cylinder 2 makes the frame body 31 stably connect with the vertical guide rail 21, and so on and forth, through the alternate climbing of the frame body 31 and the supporting frame 35, the prefabricated floor slab a 'Ship to desired location.

As another embodiment, the drive mechanism (not shown) includes a drive cylinder, several gears and a pair of racks that cooperate, and a locking mechanism that is arranged between the frame body and the vertical guide rail 21; a pair of teeth The bar is fixed on the inner side of the vertical guide rail 21 and extends vertically. The two ends of the frame body are rotatably connected with several gears. structure, under the expansion and contraction of the driving cylinder, the frame body can climb or descend along the rack; the locking mechanism is a one-way movement mechanism that can be rotated in the forward direction and blocked in the reverse direction. The locking mechanism in this embodiment is composed of a ratchet and a The ratchet mechanism composed of pawls matched with the ratchet teeth, by changing the meshing state of the pawls and the ratchet, realizes the transformation of the frame body relative to the vertical guide rail moving upwards, moving downwards and remaining stationary. The contents of the above-mentioned driving mechanism and locking mechanism are all prior art, so the structure and connection relationship thereof will not be elaborated in detail.

Please refer to Fig. 2 and Fig. 3 emphatically, the beam 22 in place has a pair of slideways 22a with a C-shaped cross section, and the two ends of the beam 22 in place have a notch 22b matched with one end of the frame body 31, when the frame When the body 31 climbed to the same height as the crossbeam 22 in place, one end of the frame body 31 could be engaged with the notch 22b of the crossbeam 22 in place. The surface of the junction of the second 22a is smooth, that is to say, the first slideway 31a and the second slideway 22a can be coherently integrated, so that the guide rail beam 34 can drive the prefabricated floor slab a' to move from the frame body 31 to the sliding position of the beam 22 in place. On the second road 22a, the transfer of the prefabricated floor a' from vertical transportation to horizontal transportation is realized.

Furthermore, in order to make the guide rail beam run more stably, several longitudinal bars are connected between the two cross bars, and the horizontal bar and the longitudinal bars constitute the guide rail beam of the frame structure, so that the bearing capacity of the guide rail beam can be enhanced. The connectors for hoisting the prefabricated floor slabs mentioned above can use components such as hooks, which are not limited here.

Preferably, the prefabricated floor quick positioning device 100 also includes a vertical positioning assembly 40, and the vertical positioning assembly 40 includes several wall-attached rails 41 horizontally installed on the facade of the prefabricated building frame a from bottom to top, and several wall-attached rails 41 The corresponding wall connector 42 of the track 41, one end of the wall connector 42 is fixedly connected with the column 21a, and the other end is connected with the third slide block or the third roller group (not shown) fixed thereon. The wall-attached track 41 is slidably fitted; the installed wall-attached connector 42 and the attached wall track 41 are located on the same level, so that the vertical guide rail 21 can slide along the wall-attached track 41 through the wall-attached connector 42, that is, by vertical positioning The component 40 ensures the stability of the prefabricated floor quick positioning device 100 in the vertical plane.

Below in conjunction with Fig. 1～Fig. 6 illustrate the working process of the prefabricated floor fast device of the present utility model:

S101: As shown in FIG. 1 , assemble the prefabricated floor slab quick positioning device 100 so that it is enclosed on the top and both sides of the prefabricated building frame a;

S102: At the initial position, hang the prefabricated floor slab a' on the horizontal guide rail beam climbing frame 30; as shown in FIG. The same height of the in-place beam 22; as shown in Figure 3, after the frame body 31 of the horizontal push guide rail beam climbing frame 30 is docked with the in-place beam 22, the guide rail beam 34 is controlled to move horizontally along the in-place beam 22, and the prefabricated floor a' Push horizontally to the predetermined position, then slide the guide rail beam 34 to the frame body 31 in the opposite direction along the in-position beam 22, and move to the initial position along the vertical guide rail 21 together with it, continue to hoist the prefabricated floor a', and carry out the current height step by step Positioning and installation of prefabricated floor slab a' in the horizontal plane;

S103: After the positioning and installation of the prefabricated floor slab a' in the horizontal plane of the current height, move the in-place beam 22 upwards and fix it so that the height of the in-place beam 22 can meet the installation height of the precast floor slab a' on the upper floor, and then hoist the precast floor slab a' and repeat step S102 to complete the positioning and installation of the prefabricated floor a' on the upper floor one by one;

S104: Repeat the above steps S102 and S103 to complete the positioning and installation of the prefabricated floor a' layer by layer.

In the above step S102, when the horizontal push guide rail beam climbing frame 30 is lifted up along the vertical guide rail 21 to the same height as the in-position beam 22, one end of the frame body 31 is engaged in the notch 22b at one end of the in-position beam 22, The first slideway 31a of the frame body 31 and the second slideway 22a of the in-place beam 22 are coherent and have a smooth transition, so that the guide rail beam 34 can drive the prefabricated floor slab a' to move from the frame body 31 to the second slideway of the in-place beam 22 22a, realizing the transfer of prefabricated floor slab a' from vertical transportation to horizontal transportation.

The above description is only a description of the preferred embodiments of the present utility model, and is not any limitation to the scope of the present utility model. Any changes and modifications made by those of ordinary skill in the field of the utility model according to the above disclosures all belong to the protection scope of the claims .

Claims (8)

1. A quick positioning device for prefabricated floor slabs, characterized in that it comprises: A pair of ground rails arranged on both sides of the prefabricated building frame; At least one U-shaped track frame capable of sliding along the ground track, the U-shaped track frame includes a pair of vertical guide rails respectively arranged on the ground tracks on both sides, located above the prefabricated building frame and connected to a pair of a beam in place between said vertical guide rails; And at least one horizontal push rail crossbeam climbing frame capable of slidingly cooperating with the vertical guide rail and the in-position crossbeam. 2. The device for fast positioning of prefabricated floor slabs according to claim 1, wherein the vertical guide rail comprises a pair of parallel columns, and a cross bar connected to the top of the pair of columns, and the bottom of the column is Both ends are connected to a base with a roller set, and the base is slidingly matched with the ground track; a number of supports are arranged at intervals on the side of the column close to the assembled building frame, and two adjacent supports The height is the height of one floor of the prefabricated building frame, and the beam in place is movably connected with the support. 3. The prefabricated floor slab rapid positioning device according to claim 2, characterized in that: the horizontal push guide rail beam climbing frame includes a frame body, and the guide rail beam that slides and fits with the frame body is fixedly connected to the guide rail beam A number of connectors at the bottom for hoisting the prefabricated floor, and a drive mechanism arranged between the vertical guide rail and the frame; both sides of the frame are provided with first sliders or first rollers set, the inner side of the column is provided with a chute that slides with the first slider or the first roller group, the driving mechanism includes a driving part and a locking mechanism, and the two ends of the driving part are respectively connected to the frame The frame body is connected with the vertical guide rail, and it can change the relative positional relationship between the frame body and the vertical guide rail, so that the frame body can move up, down or with the vertical guide rail relative to the vertical guide rail. The vertical guides remain stationary. 4. The device for fast positioning of prefabricated floor slabs according to claim 3, characterized in that: the frame body has a pair of slideways one with a C-shaped cross section, and the slideway one is far away from the frame of the prefabricated building. One end is provided with a connecting rod, so that the slideway and the connecting rod form a U-shaped guide rail with one end closed, and the guide rail beam includes two horizontal bars arranged side by side. A sliding block or a second roller set, the second sliding block or the second roller set is in sliding fit with the slideway, and the bottom end of the cross bar is connected with a connecting piece for hoisting the prefabricated floor slab. 5. The prefabricated floor quick positioning device according to claim 3 or 4, characterized in that: the driving mechanism includes a support frame arranged parallel to the frame body, several vertically arranged driving cylinders and several horizontal hydraulic cylinders One end of the driving oil cylinder is fixed on the support frame, and the other end is fixed on the frame body, and the two sides of the frame body and the support frame are provided with a stable connection with the vertical guide rail. The horizontal hydraulic cylinder. 6. The prefabricated floor quick positioning device according to claim 3 or 4, characterized in that: the drive mechanism includes a drive cylinder, a number of gears and a pair of racks that are matched, and are arranged on the frame body and the A locking mechanism between the vertical guide rails; a pair of racks are fixed on the inside of the vertical guide rails and extend vertically, the two ends of the frame body can be rotatably connected to several gears, and one end of the driving cylinder is fixed On the frame, the other end is provided with a structure that can be fixed to the vertical guide rail, and under the expansion and contraction of the driving cylinder, the frame can climb or descend along the rack. 7. The device for fast positioning of prefabricated floor slabs according to claim 4, characterized in that: the positioning beam has a pair of slideways 2 with a C-shaped cross section, and the two ends of the positioning beam have When the frame climbs to the same height as the in-position beam, one end of the frame can engage with the notch of the in-position beam, so that the frame The surface of the junction of the first slideway of the body and the second slideway of the beam in place is smooth. 8. The quick positioning device for prefabricated floor slabs according to any one of claims 1 to 4, characterized in that: it also includes a vertical positioning assembly, and the vertical positioning assembly includes horizontally installed on the prefabricated building from bottom to top. A number of wall-attached rails on the outer surface of the frame, and several wall-attached connectors corresponding to the wall-attached rails, one end of the wall-attached connector is fixedly connected to the vertical guide rail, and the other end is fixed to the vertical guide rail. The third sliding block or the third roller set on the top is slidingly matched with the described wall-attached track.