CN112962885B

CN112962885B - Assembled stair system

Info

Publication number: CN112962885B
Application number: CN202110203777.8A
Authority: CN
Inventors: 罗向勇; 高洁; 余利海; 代国华; 墙林; 王勇
Original assignee: Chongqing Tuoda Construction Group Co ltd
Current assignee: Chongqing Tuoda Construction Group Co ltd
Priority date: 2021-02-24
Filing date: 2021-02-24
Publication date: 2021-12-31
Anticipated expiration: 2041-02-24
Also published as: CN112962885A

Abstract

The utility model relates to an assembled stair system, it includes prefabricated stair body and two half space, the upper and lower both ends of prefabricated stair body all are provided with the lap joint board, set up the overlap joint groove that supplies the embedding of lap joint board on the half space, the mounting groove has been seted up on the roof of lap joint board, the width direction along prefabricated stair body on the lap joint board sets up the movable hole that runs through the mounting groove, the axial slip who all follows the movable hole in the movable hole of mounting groove both sides wears to be equipped with the push rod, be provided with the drive assembly who is used for ordering about two synchronous reverse motions of push rod in the mounting groove. When rectifying a deviation to the prefabricated staircase body, stretch out the overlap joint board in step through the push rod of ordering about the mounting groove both sides to the butt promotes the overlap joint board and removes to the middle part of mounting groove in the mounting groove on the inside wall of overlap joint groove, effectively prevents to cause the damage to prefabricated staircase or building body at the compound in-process of rectifying a deviation of prefabricated staircase body location, and this application has the effect that improves prefabricated staircase and building body construction integrality.

Description

Assembled stair system

Technical Field

The application relates to the field of prefabricated building components, in particular to a prefabricated staircase system.

Background

The fabricated building is a building which is formed by transferring a large amount of field operation work in the traditional construction mode to a factory, processing and manufacturing building components and accessories (such as floor slabs, wall slabs, stairs, balconies and the like) in the factory, transporting the components and accessories to a building construction site, and assembling and installing the components and the accessories on the site in a reliable connection mode. The prefabricated building mainly comprises a prefabricated concrete structure, a steel structure, a modern wood structure building and the like, and is a representative of a modern industrial production mode due to the adoption of standardized design, factory production, assembly construction, informatization management and intelligent application. Stairways are an important part of prefabricated buildings.

Prefabricated staircase is in hoist and mount income staircase to make the both ends of prefabricated staircase place respectively on upper and lower floor's two relative rest platform after, in order to standardize the installation of stair, need compound the rectifying to prefabricated staircase location, use crow bar etc. to adjust stair flight and rest platform overlap joint position by constructor, make prefabricated staircase both sides lateral wall equal apart from the building body wall.

With respect to the related art among the above, there are the following drawbacks: when the prefabricated staircase is pried by using the crowbar, the prefabricated staircase or the staircase is used as a fulcrum, the corners of the prefabricated staircase or the staircase body are easily damaged, and the construction quality is poor.

Disclosure of Invention

In order to improve prefabricated staircase location complex in-process prefabricated staircase integrality of rectifying, this application provides an assembled stair system.

The application provides an assembled stair system adopts following technical scheme:

the utility model provides an assembled stair system, includes prefabricated stair body and two half space, the upper and lower both ends of prefabricated stair body all are provided with the overlap joint board, set up the overlap joint groove that supplies the embedding of overlap joint board on the half space, the mounting groove has been seted up on the roof of overlap joint board, set up the movable hole that runs through the mounting groove along the width direction of prefabricated stair body on the overlap joint board, the axial sliding who all follows the movable hole in the movable hole of mounting groove both sides wears to be equipped with the push rod, be provided with the drive assembly who is used for ordering about two synchronous reverse motions of push rod in the mounting groove.

Through adopting above-mentioned technical scheme, it is middle-upper in building body stairwell to hang the overlap joint board at constructor with prefabricated staircase body both ends, back in the overlap joint inslot on the rest platform of lower floor, the staff is located the drive assembly of the mounting groove of overlap joint board through the operation, the push rod of ordering about the mounting groove both sides stretches out the overlap joint board in step, and the butt is on the inside wall of overlap joint groove, promote the overlap joint board and remove to the middle part of mounting groove in the mounting groove, carry out the same operation to two overlap joint boards at prefabricated staircase body both ends in proper order, can make prefabricated staircase body both sides apart from the stairwell wall of building body apart from impartially, effectively prevent to cause the damage to prefabricated staircase or building body at the compound in-process of rectifying a deviation of prefabricated staircase body location, improve prefabricated staircase and building body construction integrality.

Optionally, drive assembly includes mounting bracket and two-way screw rod, the mounting bracket sets up in the mounting groove, the equal vertical fixation in both ends of mounting bracket is provided with the connecting plate, the connecting plate has the inner wall laminating of movable hole with the mounting groove, set up the perforation that supplies the push rod to pass on the connecting plate, the guide way has been seted up along push rod length direction on the outer wall of push rod, the rigid coupling has the guide block of sliding connection in the guide way on the fenestrate inner wall, two-way screw rod rotates and sets up on the mounting bracket, the coaxial screw hole of seting up of tip in the mounting groove is stretched into to the push rod, the coaxial threaded connection of tip of two-way screw rod is in the screw hole of push rod, the coaxial rigid coupling in middle part of two-way screw rod has hexagon nut.

Through adopting above-mentioned technical scheme, the staff rotates two-way screw rod with the help of hexagon nut on the two-way screw rod of chucking such as spanner, two-way screw rod both ends are revolved to opposite screw thread respectively with two push rod screw thread transmission of overlap joint board both sides, order about two push rods synchronous reverse movement on the overlap joint board, thereby make the inside wall in push rod butt overlap joint groove, promote the overlap joint board and remove to overlap joint groove middle part, when two push rods butt are on the inside wall in overlap joint groove simultaneously, the alignment is concentrated in the completion of the overlap joint board, and convenient operation.

Optionally, an inserting cylinder for inserting a crowbar is fixedly connected to one side of the two-way screw rod, which is located on the hexagon nut, and a plurality of inserting cylinders are arranged at intervals along the circumferential direction of the two-way screw rod.

Through adopting above-mentioned technical scheme, when the staff rotated two-way screw rod, can use the crowbar to insert in the grafting section of thick bamboo on the two-way screw rod to obtain great moment, overcome the frictional force of overlap joint board on the overlap joint groove, make the laborsaving convenience of prefabricated staircase body skew.

Optionally, the connecting plate is detachably connected with the inner wall bolt of the mounting groove, and the top of the movable hole is provided with an opening communicated with the top wall of the lap joint plate.

Through adopting above-mentioned technical scheme, accomplish the compound work of rectifying in location of prefabricated stair body at constructor, pull down the connecting plate from the inner wall of mounting groove, take out mounting bracket and two-way screw rod, push rod etc. from the mounting groove again, supply the concrete in the mounting groove, push rod and the drive assembly reuse that can make, resources are saved.

Optionally, the ball part is coaxially and fixedly arranged at one end, away from the mounting groove, of the push rod, the guide grooves are formed in the side walls of the two sides of the lapping groove, and the inner bottom wall of each guide groove is an open spherical surface with a concave surface facing the guide grooves.

Through adopting above-mentioned technical scheme, when the push rod butt was removed at the inside wall of overlap joint groove and promotion overlap joint board, the bulb of push rod and the interior diapire butt of guiding groove effectively reduced the area of contact between push rod and the overlap joint inslot wall, made things convenient for constructor to promote prefabricated stair body and overlap joint board and remove.

Optionally, the prefabricated staircase body includes that the slope sets up the bench between two overlap joint boards and can dismantle a plurality of step units of setting on the bench, the splice groove has been seted up along the long limit direction in the inclined plane of bench to the roof of bench, and is a plurality of set up along splice groove length direction interval in the step unit, the step unit is including standing board and backup pad, set up the first slot that supplies the backup pad to peg graft along vertical direction on the inside wall of splice groove, set up the second slot that supplies the board of standing to peg graft along the horizontal direction on the inside wall of splice groove, first slot and second slot have a plurality of along splice groove length direction evenly spaced distribution, be provided with the locating component who is used for fixed station board and backup pad on the prefabricated staircase body.

Through adopting above-mentioned technical scheme, when hoist and mount and carry out the compound deviation correction of location to prefabricated stair body, pull down each step unit on the bench of prefabricated stair body earlier, can effectively alleviate prefabricated stair body weight, make things convenient for the deviation rectification of bench and overlap joint board to remove, after the bench aligns, insert the backup pad again in proper order on the bench, the board of standing uses locating component at last to fix backup pad and the installation of board of standing, accomplishes the installation of prefabricated stair body promptly, convenient operation.

Optionally, the locating component includes pre-buried screw rod and set nut, the bottom of first slot and the one end intercommunication that the second slot is close to the interior diapire of splice groove, set up the draw-in groove of pegging graft with the bottom of upper backup pad on the roof of station board, the station board is including the locating plate that is close to the bench top, the recess that supplies the locating plate embedding is seted up at the top of bench, the perpendicular fixed connection of pre-buried screw rod is on the diapire of recess, set up the counter sink that matches with pre-buried screw rod on the roof of locating plate, set nut and pre-buried screw rod threaded connection, set nut is located the counter sink.

By adopting the technical scheme, when the prefabricated staircase body is installed, the support plate is inserted into the first slot of the staircase section from bottom to top, the standing plate is inserted into the second slot, the bottom wall of the standing plate is abutted against the upper edge of the support plate below, then the support plate is continuously inserted above the standing plate, the lower edge of the support plate above is clamped into the clamping groove of the top wall of the standing plate, the step units are repeatedly and continuously assembled upwards, when the positioning plate in the last standing plate at the top of the staircase section is assembled, the positioning plate is embedded into the groove at the top of the staircase section, the embedded screw in the groove penetrates through the counter bore on the positioning plate, the positioning plate is fixed in the counter bore by screwing the positioning nut, and finally the filling agent such as joint sealant is used for filling the counter bore, namely, the assembly of the prefabricated staircase body is completed, and the operation is convenient.

Optionally, the bottom of mounting groove is opened and is worn to establish, the rigid coupling has embedded bar on the inner wall of mounting groove, the rigid coupling has the connecting reinforcement who is used for being connected with embedded bar on the diapire of overlap joint groove.

Through adopting above-mentioned technical scheme, the bottom of mounting groove is opened and is worn, can further reduce the weight of prefabricated stair body, conveniently removes the prefabricated stair body. When the lap joint plate is lapped in the lap joint groove on the rest platform, the embedded sensing in the mounting groove is connected with the connecting steel bars on the lap joint groove, concrete is poured in the mounting groove, and the connection stability of the lap joint plate and the lap joint platform is improved.

Optionally, a sliding layer is fixedly connected to the bottom wall of the lapping plate.

Through adopting above-mentioned technical scheme, the slip layer shell reduces the frictional force between overlap joint board and the overlap joint tank bottom wall, makes things convenient for constructor to remove the prefabricated staircase body when rectifying a deviation to the prefabricated staircase body.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the prefabricated staircase body is subjected to deviation rectification, the push rods on the two sides of the mounting groove are driven to synchronously extend out of the lap plate and abut against the inner side wall of the lap groove, so that the lap plate is pushed to move to the middle part of the mounting groove in the mounting groove, the prefabricated staircase or a building body is effectively prevented from being damaged in the positioning composite deviation rectification process of the prefabricated staircase body, and the construction integrity of the prefabricated staircase and the building body is improved;

2. when the prefabricated staircase body is hoisted and positioned for compound deviation correction, the step units on the stair sections of the prefabricated staircase body are firstly disassembled, so that the weight of the prefabricated staircase body can be effectively reduced, the deviation correction movement of the stair sections and the lap plates is facilitated, after the stair sections are aligned, the supporting plates and the station plates are sequentially inserted into the stair sections, and finally the supporting plates and the station plates are fixedly installed by using the positioning assemblies, so that the installation of the prefabricated staircase body is completed, and the operation is convenient;

3. the bottom of mounting groove is opened and is worn, can further reduce the weight of prefabricated stair body, conveniently removes prefabricated stair body. When the lap joint plate is lapped in the lap joint groove on the rest platform, the embedded sensing in the mounting groove is connected with the connecting steel bars on the lap joint groove, concrete is poured in the mounting groove, and the connection stability of the lap joint plate and the lap joint platform is improved.

Drawings

Fig. 1 is an overall structural diagram of an installation state of a prefabricated staircase body according to an embodiment of the present application.

Fig. 2 is an exploded structural view of the prefabricated staircase body according to the embodiment of the present application.

Fig. 3 is a partially enlarged schematic view of a portion a in fig. 2.

Fig. 4 is a partially enlarged schematic view of a portion B in fig. 2.

Description of reference numerals: 1. prefabricating a stair body; 11. a bench; 111. splicing grooves; 112. a first slot; 113. a second slot; 114. a positioning assembly; 1141. pre-burying a screw; 1142. positioning a nut; 1143. a groove; 12. a step unit; 121. standing the plate; 1211. a card slot; 1212. positioning a plate; 1213. a countersunk hole; 122. a support plate; 2. a resting platform; 21. a lap joint groove; 22. a guide groove; 23. connecting reinforcing steel bars; 3. a lap plate; 31. mounting grooves; 32. a movable hole; 33. embedding reinforcing steel bars in advance; 34. a sliding layer; 4. a push rod; 41. a guide groove; 42. a threaded hole; 43. a spherical part; 5. a drive assembly; 51. a mounting frame; 52. a bidirectional screw; 53. a connecting plate; 54. perforating; 55. a guide block; 56. a hexagonal nut; 57. a plug-in cartridge.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses an assembled stair system. Referring to fig. 1, the prefabricated staircase system includes a prefabricated staircase body 1 and two rest platforms 2. Two rest platform 2 fix the both sides at the staircase along vertical direction staggered floor in the staircase of building body, and the equal integrated into one piece in both ends of prefabricated stair body 1 has the overlap joint board 3 that is used for the overlap joint on rest platform 2. Prefabricated building body includes bench 11 and a plurality of

step unit

12, and 11 slopes of bench are connected between two overlap joint boards 3, and the long edge direction of bench 11 is parallel with the incline direction of bench 11, adopts the one-step prefabrication shaping of concrete, and step unit 12 is arranged along 11 long edge direction intervals of bench to can dismantle with bench 11 and be connected.

Referring to fig. 2 and 3, the edge of the top wall of the rest platform 2, which is close to the middle of the staircase, is provided with a lap joint groove 21 for embedding the lap joint plate 3, and the width of the lap joint groove 21 is larger than that of the prefabricated staircase body 1. The mounting groove 31 has been seted up to running through perpendicularly on the roof of bridging plate 3, and on the width direction vertically lateral wall of bridging plate 3 and prefabricated stair body 1, set up the activity hole 32 that runs through bridging plate 3, activity hole 32 passed mounting groove 31, and the roof of wearing to bridging plate 3 is opened at the top of activity hole 32. The push rods 4 are respectively installed in the movable holes 32 on the two sides of the installation groove 31 in a sliding manner along the width direction of the prefabricated staircase body 1, and the installation groove 31 is internally provided with a driving assembly 5 for driving the two push rods 4 to be close to or far away from each other synchronously. In this embodiment, the driving assembly 5 includes a bidirectional screw 52 and a mounting bracket 51. The mounting bracket 51 is placed in the mounting groove 31 along the width direction of the prefabricated staircase body 1, the length of the mounting bracket 51 is equal to the length of the mounting groove 31 in the width direction of the prefabricated staircase body 1, the two ends of the mounting bracket 51 are respectively vertically and integrally connected with connecting plates 53, and the two connecting plates 53 are respectively attached to the inner walls of the two sides of the mounting groove 31 with the movable holes 32. Be equipped with the through-hole on the connecting plate 53, be equipped with the screw that corresponds with the through-hole site on the inner wall of mounting groove 31, constructor passes the through-hole on the connecting plate 53 through using the bolt and again with the screw threaded connection on the mounting groove 31 inner wall, accomplishes the fixed of mounting bracket 51 in mounting groove 31.

The connecting plate 53 is provided with a through hole 54 which is matched with the position and the size of the push rod 4 which moves in the moving hole 32, and a guide block 55 is integrally fixed on the inner wall of the through hole 54. The outer wall of the push rod 4 is provided with a guide groove 41 matched with the guide block 55 in size along the length direction of the push rod 4, the push rod 4 is coaxially arranged on the through hole 54 in a sliding mode, and the guide block 55 slides in the guide groove 41. In order to improve the guiding stability of the push rod 4, the guide groove 41 and the guide block 55 are provided with a plurality of sets along the circumferential direction of the push rod 4, and in this embodiment, the guide groove 41 and the guide block 55 are provided with three sets. The bidirectional screw 52 is rotatably mounted on the mounting frame 51, the axial direction of the bidirectional screw 52 is parallel to the length direction of the mounting frame 51, the outer walls of the two ends of the bidirectional screw 52 are respectively provided with threads with opposite thread turning directions, the end surface of the push rod 4 close to one side of the mounting groove 31 is coaxially provided with a threaded hole 42 matched with the threads on the bidirectional screw 52, and the two push rods 4 on the two sides of the lapping plate 3 are respectively in threaded connection with the threads on the bidirectional screw 52 with opposite ends. In order to prevent the bidirectional screw 52 from axially sliding on the mounting frame 51 along the bidirectional screw 52, a clamping seat is welded and fixed on the mounting frame 51, the bidirectional screw 52 is rotatably mounted on the clamping seat, and at least two limiting rings are further welded and fixed on the bidirectional screw 52 and abut against two sides of the clamping seat respectively. In order to rotate the bidirectional screw 52, a hexagonal nut 56 is coaxially and integrally formed in the middle of the bidirectional screw 52, in order to increase the rotation torque, an inserting cylinder 57 is further welded and fixed on the outer wall of the bidirectional screw 52, an axis extension line of the inserting cylinder 57 penetrates through and is perpendicular to the axis of the bidirectional screw 52, one end of the inserting cylinder 57, which is far away from the bidirectional screw 52, is open, so that a constructor can insert a crowbar and rotate the bidirectional screw 52 conveniently, and a plurality of inserting cylinders 57 are uniformly arranged along the circumferential direction of the bidirectional screw 52 at intervals.

The end of the push rod 4 far away from the mounting groove 31 is a spherical part 43 with smooth surface, the parallel inner side walls at the two sides of the lapping groove 21 are provided with a guide groove 22, the inner bottom wall of the guide groove 22 is a spherical surface with smooth surface, and the concave surface of the spherical surface of the guide groove 22 faces the opening of the guide groove 22. The spherical surface radius of the guiding groove 22 should be larger than the radius of the spherical part 43 on the push rod 4, and the two guiding grooves 22 at the two sides of the lap joint groove 21 are opposite to each other. In order to reduce the friction force between the bottom wall of the lap plate 3 and the bottom wall of the lap groove 21, the bottom wall of the lap plate 3 is provided with the sliding layer 34, in the embodiment, the sliding layer 34 is made of a polytetrafluoroethylene plate, and the polytetrafluoroethylene plate is lifted and placed into a mold when the prefabricated staircase body 1 is poured and is tightly bonded with the lap plate 3.

In order to improve the lap joint stability between lapping plate 3 and the rest platform 2, pre-buried stretching out has embedded bar 33 on the inner wall of mounting groove 31, and pre-buried stretching out has connecting bar 23 on the diapire of lap joint groove 21. After 1 location complex of prefabricated stair body is rectified, take out from mounting bracket 31 with mounting bracket 51 etc. and use the stirrup to be connected embedded bar 33 and connecting reinforcement 23, fill up the concrete in to mounting bracket 31 at last, make bridging plate 3 be connected as an organic wholely with rest platform 2.

Referring to fig. 2 and 4, the step unit 12 includes a support plate 122 and a standing plate 121, and a splicing groove 111 is formed on the inclined surface of the flight 11 of the prefabricated staircase body 1 along the long side direction of the inclined surface of the flight 11. The inside wall that the both sides of concatenation groove 111 are parallel to each other all offers the first slot 112 that supplies backup pad 122 to peg graft and supplies the second slot 113 of standing board 121 grafting, and the length direction of first slot 112 is mutually perpendicular with the last plane of lapping plate 3, and the last plane of the length direction lapping plate 3 of second slot 113 is parallel. The first slots 112 and the second slots 113 are respectively provided with a plurality of slots on the bench 11 along the long side direction of the inclined plane of the bench 11, the first slots 112 and the second slots 113 are arranged at intervals, the number of the first slots 112 is one more than that of the second slots 113, and the number of the first slots 112 is the same as that of the step units 12. The bottom of the first slot 112 nearest above the second slot 113 is communicated with the second slot 113, and the communication port of the bottom of the first slot 112 on the second slot 113 is far away from the end of the second slot 113 in the splicing slot 111. When the standing plate 121 is assembled on the bench 11, the length direction of the standing plate 121 is parallel to the width direction of the bench 11, and a slot 1211 with the width equal to the thickness of the supporting plate 122 is formed on the upper plane of the standing plate 121 along the length direction of the standing plate 121. When the standing board 121 is mounted in the second slot 113, the card slot 1211 on the standing board 121 is aligned with the communication port of the first slot 112 on the second slot 113. The sum of the distance between two adjacent second slots 113 and the depth of the locking slot 1211 is equal to the height of the support plate 122 in the first slot 112.

The support plate 122 on the rung 11, the support plate 122 and the standing plate 121 are sequentially mounted from bottom to top, so that the bottom of the support plate 122 above the standing plate 121 is inserted into the slot 1211 on the standing plate 121, and the top of the support plate 122 below the standing plate 121 abuts against the bottom wall of the standing plate 121. Finally, the integral standing plate 121 and the supporting plate 122 on the bench 11 are fixed by the positioning assembly 114, in this embodiment, the positioning assembly 114 includes a pre-embedded screw 1141 and a positioning nut 1142. The standing plate 121 in the uppermost step unit 12 of the bench 11 is a positioning plate 1212, a groove 1143 for the positioning plate 1212 to be embedded is horizontally formed in the top of the bench 11, when the positioning plate 1212 is embedded in the groove 1143, the bottom wall of the positioning plate 1212 abuts against the upper side of the lower support plate 122, and the top wall of the positioning plate 1212 is flush with the top wall of the lap plate 3 at the top of the bench 11. The embedded screw 1141 is vertically embedded and fixed on the bottom wall of the groove 1143, and the top of the embedded screw 1141 is not high and the groove 1143 is open. The positioning plate 1212 is provided with a counter bore 1213 corresponding to the hole position of the embedded screw 1141, the embedded screw 1141 passes through the counter bore 1213, the positioning nut 1142 is screwed onto the positioning screw and abuts against the step in the counter bore 1213, so that the positioning plate 1212 is fixed in the recess 1143 and the movement of each step unit 12 is limited. After the positioning nut 1142 is mounted in place, the counter bore 1213 may be filled with a gap filler such as gap filling glue, so that the surface of the positioning plate 1212 is flat.

The implementation principle of an assembled stair system of the embodiment of the application is as follows: after the constructor hangs the overlapping plates 3 at both ends of the prefabricated staircase body 1 in the overlapping grooves 21 on the rest platforms 2 of the upper and lower floors of the staircase of the building body, the constructor inserts the prying bar into the insertion cylinder 57 on the bidirectional screw rod 52 positioned in the installation groove 31 of the overlapping plate 3. Then, the two-way screw 52 is rotated, the push rods 4 on both sides of the mounting groove 31 are driven to synchronously extend out of the lapping plate 3 and abut against the inner side wall of the lapping groove 21 through the guiding effect of the connecting plate 53 on the push rods 4 and the thread transmission between the two-way screw 52 and the push rods 4. The two push rods 4 keep away from each other until the two push rods 4 synchronously abut against the inner walls of the two sides of the lap joint groove 21, namely, the lap joint plate 3 is pushed to move towards the middle part of the installation groove 31 in the installation groove 31. The same operation is carried out to two faying plate 3 at 1 both ends of prefabricated stair body in proper order, can make 1 both sides of prefabricated stair body apart from the stairwell wall distance of the building body impartial. Effectively prevent to cause the damage to prefabricated stair or building body at 1 location compound in-process of rectifying of prefabricated stair body, improve prefabricated stair and building body construction integrality.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an assembled stair system, includes prefabricated stair body (1) and two half space (2), the upper and lower both ends of prefabricated stair body (1) all are provided with overlap joint board (3), offer overlap joint groove (21) that supply overlap joint board (3) to imbed on half space (2), its characterized in that: the top wall of the lap joint plate (3) is provided with a mounting groove (31), the lap joint plate (3) is provided with a movable hole (32) penetrating through the mounting groove (31) along the width direction of the prefabricated staircase body (1), push rods (4) are arranged in the movable holes (32) on the two sides of the mounting groove (31) in a penetrating manner along the axial direction of the movable hole (32) in a sliding manner, and a driving assembly (5) for driving the two push rods (4) to synchronously and reversely move is arranged in the mounting groove (31);

drive assembly (5) includes mounting bracket (51) and two-way screw rod (52), mounting bracket (51) sets up in mounting groove (31), the equal vertical fixation in both ends of mounting bracket (51) is provided with connecting plate (53), connecting plate (53) have the inner wall laminating of activity hole (32) with mounting groove (31), set up perforation (54) that supply push rod (4) to pass on connecting plate (53), set up guide way (41) along push rod (4) length direction on the outer wall of push rod (4), the rigid coupling has guide block (55) of connection in guide way (41) that slides on the inner wall of perforation (54), two-way screw rod (52) rotate and set up on mounting bracket (51), push rod (4) stretch into the coaxial screw hole (42) of seting up of tip in mounting groove (31), the coaxial threaded connection of tip of two-way screw rod (52) is in screw hole (42) of push rod (4), a hexagonal nut (56) is coaxially and fixedly connected to the middle part of the bidirectional screw (52);

a spherical part (43) is coaxially and fixedly arranged at one end of the push rod (4) far away from the mounting groove (31), guide grooves (22) are formed in the side walls of the two sides of the lapping groove (21), and the inner bottom wall of each guide groove (22) is a spherical surface with a concave surface facing the opening of each guide groove (22);

one side rigid coupling that lies in hexagon nut (56) on two-way screw rod (52) has a section of thick bamboo of pegging graft (57) that is used for supplying the crowbar to peg graft, a plurality of is provided with along two-way screw rod (52) circumference even interval in a section of thick bamboo of pegging graft (57).

2. The system of claim 1, wherein: the connecting plate (53) is detachably connected with the inner wall bolt of the mounting groove (31), and the top of the movable hole (32) is provided with an opening communicated with the top wall of the lap joint plate (3).

3. The system of claim 1, wherein: the prefabricated staircase body (1) comprises a staircase section (11) obliquely arranged between two lap-joint plates (3) and a plurality of step units (12) detachably arranged on the staircase section (11), the top wall of the staircase section (11) is provided with splicing grooves (111) along the long side direction of the inclined plane of the staircase section (11), the step units (12) are arranged at intervals along the length direction of the splicing grooves (111), the step units (12) comprise station plates (121) and supporting plates (122), the inner side wall of the splicing groove (111) is provided with first slots (112) for the splicing of the supporting plates (122) along the vertical direction, the inner side wall of the splicing groove (111) is provided with second slots (113) for the splicing of the station plates (121) along the horizontal direction, and the first slots (112) and the second slots (113) are uniformly distributed at intervals along the length direction of the splicing groove (111), the prefabricated staircase body (1) is provided with a positioning assembly (114) for fixing the standing plate (121) and the supporting plate (122).

4. A fabricated staircase system as defined in claim 3, wherein: the positioning assembly (114) comprises an embedded screw (1141) and a positioning nut (1142), the bottom end of the first slot (112) is communicated with one end, close to the inner bottom wall of the splicing groove (111), of the second slot (113), a clamping groove (1211) which is inserted with the bottom of the upper support plate (122) is formed in the top wall of the standing plate (121), the standing plate (121) comprises a positioning plate (1212) which is close to the top of the bench section (11), a groove (1143) which is used for embedding the positioning plate (1212) is formed in the top of the bench section (11), the embedded screw (1141) is vertically and fixedly connected to the bottom wall of the groove (1143), a counter bore (1213) which is matched with the embedded screw (1141) is formed in the top wall of the positioning plate (1212), the positioning nut (1142) is in threaded connection with the embedded screw (1141), and the positioning nut (1142) is located in the counter bore (1213).

5. The prefabricated staircase system of any of claims 1 to 4, wherein: lapping plate (3) is run through to the bottom of mounting groove (31), the rigid coupling has embedded bar (33) on the inner wall of mounting groove (31), the rigid coupling has connecting reinforcement (23) that are used for being connected with embedded bar (33) on the diapire of overlap joint groove (21).

6. The system of claim 1, wherein: the bottom wall of the lapping plate (3) is fixedly connected with a sliding layer (34).