阅读说明：本技术 一种叠合式楼梯 (Folding stair ) 是由 陆荣荣 于 2021-10-19 设计创作，主要内容包括：本申请公开了一种叠合式楼梯,其包括倾斜设置的梯梁和设置在梯梁远离地面一侧的多个脚踏板,多个脚踏板沿梯梁倾斜方向间隔设置,梯梁的一侧铰接设置有收纳箱,收纳箱嵌设在墙体上,收纳箱内设置有用于将梯梁锁紧在墙体上的锁紧件。本申请具有缩小楼梯的空间占用率的效果。(The application discloses superimposed stair, its ladder roof beam that sets up including the slope keeps away from a plurality of running-boards of ground one side with setting up at the ladder roof beam, and a plurality of running-boards set up along ladder roof beam incline direction interval, and one side of ladder roof beam is articulated to be provided with the containing box, and the containing box inlays to be established on the wall body, is provided with the retaining member that is used for locking the ladder roof beam on the wall body in the containing box. The stair have the effect of reducing the space occupancy rate of the stairs.)

1. The utility model provides a superimposed stair, includes ladder roof beam (1) that the slope set up and sets up and is in ladder roof beam (1) keeps away from a plurality of running-boards (2) of ground one side, a plurality of running-board (2) are along ladder roof beam (1) incline direction interval sets up its characterized in that: articulated containing box (3) that is provided with of one side of ladder roof beam (1), containing box (3) inlay and establish on the wall body, be provided with in containing box (3) and be used for with locking retaining member (4) on the wall body of ladder roof beam (1).

2. A collapsible stairway as claimed in claim 1 wherein: one side that ladder roof beam (1) is close to ground is provided with backup pad (5), backup pad (5) are close to one side of containing box (3) base frame is provided with a plurality of mount pad (6), and is a plurality of mount pad (6) are followed ladder roof beam (1) incline direction interval sets up, be provided with hinge bar (7) on backup pad (5), hinge bar (7) run through a plurality ofly in proper order mount pad (6), just hinge bar (7) with mount pad (6) rigid coupling, the both ends of hinge bar (7) respectively with the frame at containing box (3) both ends rotates to be connected, be provided with in containing box (3) and be used for the restriction hinge bar (7) free rotation's spacing subassembly (8).

3. A collapsible stairway as claimed in claim 2 wherein: spacing subassembly (8) are provided with a plurality ofly, spacing subassembly (8) including coaxial rigid coupling ratchet (81) on articulated rod (7) and with pawl (82) of ratchet (81) butt, pawl (82) elastic connection be in on containing box (3) the end frame.

4. A collapsible stairway as claimed in claim 3 wherein: a connecting rod (9) is fixedly connected between the pawls (82), two ends of the connecting rod (9) are connected to the frames at two ends of the containing box (3) in a sliding mode respectively, and the connecting rod (9) is used for driving the pawls (82) to move towards the direction far away from the ratchet wheel (81) synchronously.

5. A collapsible stairway as claimed in claim 3 wherein: the pedal is characterized in that an elastic cushion (10) is arranged on the end face, far away from the pedal plate (2), of the support plate (5), the elastic cushion (10) is located on one side, far away from the pawl (82), of the hinge rod (7), a groove (11) used for being matched with the elastic cushion (10) in an inserting mode is formed in the bottom frame of the storage box (3), when the support plate (5) rotates to be parallel to the bottom frame of the storage box (3), one end, far away from the support plate (5), of the elastic cushion (10) is abutted to the bottom wall of the groove (11).

6. A collapsible stairway as claimed in claim 1 wherein: the inner wall of the containing box (3) parallel to the wall body is elastically connected with a decorative plate (12), and the decorative plate (12) can move towards the direction close to/far away from the wall body.

7. A collapsible stairway as claimed in claim 2 wherein: retaining member (4) set up to the pin, the pin is located on the frame at containing box (3) both ends, just the pin screw thread runs through the frame setting at containing box (3) both ends, backup pad (5) are close to all seted up on the terminal surface of containing box (3) both ends frame with locking groove (13) of pin joint.

8. A collapsible stairway as claimed in claim 2 wherein: the end face, far away from the pedal plate (2), of the support plate (5) is provided with a decorative layer (14).

Technical Field

The application relates to the technical field of stairs, in particular to a folding stair.

Background

Nowadays, more and more people buy the duplex building, the duplex building can be with the better differentiation in public region and the private space in family, because the floor height of duplex building is high, so be provided with the stair in the duplex building, the stair can communicate public region and private space.

In the related art, a Chinese patent with application number 201922114484.3 provides a detachable stair for a compound building, which comprises a stair beam, wherein the tops of two sides of the stair beam are both provided with connecting caulking grooves, the connecting caulking grooves are internally embedded and matched with connecting pressure plates, the positions of the two side edges of the stair beam corresponding to the connecting pressure plates are both connected with fastening pins in a penetrating manner, and the surface of the top end of the stair beam is provided with a stable slope plate; the pedal is installed to stable ramp top surface equidistance, running-board one side end fixedly connected with kickplate, it has sealed preforming to connect fixed bonding of kickplate top limit portion, one connect through connecting bolt fixed connection between the running-board of kickplate and adjacent position department, be located the equal fixedly connected with fixed plate of running-board limit end of stable ramp top both ends position department, two the fixed plate limit end intersects perpendicularly with the junction of stabilizing the ramp and is connected with the connection scute, connect the scute limit portion and install holding screw.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: because the public area and the private space are not at the same height, the stairs are erected between the public area and the private space, so that the stairs are often erected between the public area and the private space in an inclined arrangement mode for people to climb, and the space occupancy rate of the inclined stairs is large, so that the activity space of people is reduced.

Disclosure of Invention

In order to solve the problem of large space occupancy rate of stairs in a compound building, the application provides a folding type stair.

The application provides a superimposed stair adopts following technical scheme:

the utility model provides a superimposed stair, is in including the ladder roof beam that the slope set up and setting a plurality of running-boards of ground one side are kept away from to the ladder roof beam, and is a plurality of the running-board is followed ladder roof beam incline direction interval sets up, one side of ladder roof beam is articulated to be provided with the containing box, the containing box inlays to be established on the wall body, be provided with in the containing box and be used for with the retaining member of ladder roof beam locking on the wall body.

Through adopting above-mentioned technical scheme, the containing box is installed on the wall body, the ladder roof beam articulates in the containing box, when needs use stair, only need with the ladder roof beam unblock from the containing box in, then the ladder roof beam is rotated towards the direction of keeping away from the wall body for the running-board exposes, one side of ladder roof beam is passed through the containing box and is installed on the wall body, the both ends of opposite side respectively with the floor butt in public area and private space, make the people can come and go in public area and private space two places through a plurality of running-boards. When need not using stair, only need rotate the ladder beam towards the wall body direction, the ladder beam drives a plurality of running-boards and rotates to the containing box in, uses the retaining member to lock the ladder beam in the containing box at last, and stair are accomodate in the containing box of installing on the wall body this moment, have reduced the space occupancy of stair.

Optionally, one side that the ladder roof beam is close to ground is provided with the backup pad, the backup pad is close to one side of containing box bottom frame is provided with a plurality of mount pads, and is a plurality of the mount pad is followed ladder roof beam incline direction interval sets up, be provided with the hinge bar in the backup pad, the hinge bar runs through a plurality of in proper order the mount pad, just the hinge bar with the mount pad rigid coupling, the both ends of hinge bar respectively with the frame at containing box both ends rotates to be connected, be provided with in the containing box and be used for the restriction hinge bar free rotation's spacing subassembly.

By adopting the technical scheme, the mounting seat is fixedly mounted on the ladder beam through the supporting plate, one side of the ladder beam is hinged to the storage box through the hinge rod through the mounting seat, when the stair is not needed to be used, the ladder beam only needs to be rotated towards the direction of a wall body, the ladder beam drives the mounting seat to rotate through the supporting plate, the mounting seat drives the hinge rod to rotate, and at the moment, the ladder beam is rotated and stored into the storage box; because the quantity of the pedals on the ladder beam is large, when a person rotates the ladder beam, the ladder beam is easy to rotate towards the direction close to the ground under the action of gravity, the limiting assembly limits the free rotation of the hinge rod to prevent the ladder beam from automatically rotating towards the direction close to the ground, and the problem that when the person rotates the ladder beam, the ladder beam falls towards the direction close to the ground and rotates to hurt the person is avoided as much as possible; spacing subassembly and retaining member mutually support simultaneously and use for the ladder roof beam can be stably locked in the containing box.

Optionally, the limiting assembly is provided with a plurality of limiting assemblies, each limiting assembly comprises a ratchet wheel coaxially fixedly connected to the hinge rod and a pawl abutted to the ratchet wheel, and the pawls are elastically connected to the frame at the bottom of the storage box.

Through adopting above-mentioned technical scheme, when need not using stair, only need rotate the ladder roof beam towards the wall body direction, the ladder roof beam passes through backup pad and mount pad and drives the hinge bar rotation, the hinge bar drives the ratchet and rotates, because pawl elastic connection is on storage box bottom frame, so the hinge bar can drive the ratchet and rotate towards a direction, and another rotation direction of ratchet is locked, make the people can order about the ladder roof beam and rotate towards the direction that is close to the wall body and be accomodate to the storage box in, and the locking effect of ratchet and pawl has restricted the ladder roof beam independently towards the rotation of keeping away from the wall body direction, avoided the ladder roof beam to rotate and hinder the people towards the direction that is close to ground under the action of gravity as far as possible.

Optionally, a connecting rod is fixedly connected between the plurality of pawls, two ends of the connecting rod are connected to the frames at two ends of the storage box in a sliding mode respectively, and the connecting rod is used for driving the plurality of pawls to move towards the direction far away from the ratchet wheel synchronously.

By adopting the technical scheme, when the stair needs to be used, the connecting rods drive the plurality of pawls to synchronously move towards the direction far away from the ratchet wheel, so that the pawls are not abutted to the ratchet wheel any more, then the ladder beam is rotated towards the direction far away from the wall body, the ladder beam drives the hinge rod to rotate, the hinge rod drives the ratchet wheel to rotate, and the ladder beam can be quickly rotated out of the containing box; the setting of connecting rod makes a plurality of ratchet can be by the unblock in step, reaches the effect that improves the efficiency that stair were expanded.

Optionally, an elastic pad is arranged on the end face, away from the pedal, of the support plate, the elastic pad is located on one side, away from the pawl, of the hinge rod, a groove used for being matched with the elastic pad in an inserted mode is formed in a bottom frame of the storage box, and when the support plate rotates to be parallel to the bottom frame of the storage box, one end, away from the support plate, of the elastic pad is abutted to the bottom wall of the groove.

By adopting the technical scheme, when the supporting plate rotates to be parallel to the bottom frame of the storage box, the plurality of pedals on the ladder beam are all parallel to the ground, the stair is completely unfolded, one end, far away from the supporting plate, of the elastic pad is inserted into the groove and abutted against the bottom wall of the groove, the supporting plate is stably supported in the bottom frame of the storage box due to the arrangement of the elastic pad, and the hinged rod is prevented from being broken as far as possible; meanwhile, the elastic pad is inserted into the groove, so that the position of the supporting plate relative to the bottom frame of the storage box is stable, the supporting plate is prevented from driving the ladder beam to shake along the length dimension direction of the hinge rod as far as possible, and the stability of the stair during use is further guaranteed.

Optionally, the inner wall of the storage box parallel to the wall is elastically connected with a decorative plate, and the decorative plate can move towards the direction close to/far from the wall.

Through adopting above-mentioned technical scheme, when needs use stair, towards keeping away from the wall body direction and rotating the ladder roof beam, the decorative board in the containing box exposes this moment, and the setting up of decorative board makes the containing frame both can be used to accomodate storage stair, also can be used for decorating the wall body for the containing frame has practicality and sight. Decorative board elastic connection is on containing box and the parallel inner wall of wall body simultaneously for when the ladder beam is rotated towards being close to the wall body direction, the border and the decorative board butt of ladder beam promote the decorative board towards being close to the motion of wall body direction, and decorative board elasticity sets up can not influence containing box to the accomodating of stair.

Optionally, the locking piece is set to be a pin, the pin is located on the frames at the two ends of the containing box, the pin threads penetrate through the frames at the two ends of the containing box, and the supporting plate is close to locking grooves connected with the pin are formed in the end faces of the frames at the two ends of the containing box.

By adopting the technical scheme, when the ladder beam is locked in the containing box, the pin only needs to be rotated, moves towards the direction of the support plate and is inserted into the locking groove, and the interaction between the pin and the locking groove enables the ladder beam to be stably locked in the containing box; and when the ladder beam is locked in the containing box, the decorative plate is abutted on the pedal plate, so that the decorative plate has the tendency of pushing the ladder beam and the supporting plate to rotate towards the direction far away from the wall body, the circumferential wall of the pin is further abutted against the inner wall of the locking groove, and the stability of the pin inserted in the locking groove is ensured.

Optionally, a decorative layer is arranged on the end face, away from the pedal, of the supporting plate.

Through adopting above-mentioned technical scheme, the ladder roof beam is accomodate the locking back in the containing box, and the decorative layer exposes for after stair were packed up, the wall body of installing the containing box still has the sight.

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

1. the storage box is mounted on a wall, the ladder beam is hinged in the storage box, when the stair is not needed, the ladder beam only needs to be rotated towards the direction of the wall, the ladder beam drives the pedals to rotate into the storage box, and finally the ladder beam is locked in the storage box by using the locking piece, so that the stair is stored in the storage box mounted on the wall, and the space occupancy rate of the stair is reduced;

2. in the process of rotating the ladder beam towards the wall body, the ladder beam drives the hinge rod to rotate through the supporting plate and the mounting seat, the hinge rod drives the ratchet wheel to rotate, the pawl is elastically connected to the bottom frame of the containing box, so the hinge rod can drive the ratchet wheel to rotate towards one direction, the other rotation direction of the ratchet wheel is locked, a person can drive the ladder beam to rotate towards the direction close to the wall body and is contained in the containing box, the rotation of the ladder beam towards the direction far away from the wall body is limited by the locking action of the ratchet wheel and the pawl, and the problem that the ladder beam rotates towards the direction close to the ground under the action of gravity to hurt the person is avoided as much as possible;

3. when needs use stair, the wall body direction of keeping away from rotates the ladder roof beam, and the decorative board in the containing box exposes this moment, and the setting up of decorative board makes the containing frame both can be used to accomodate storage stair, also can be used to decorate the wall body for the containing frame has practicality and sight.

Drawings

Fig. 1 is a schematic structural view of the stair deployment in the embodiment of the present application.

Fig. 2 is a schematic structural view of a stair retraction in the embodiment of the present application.

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

Reference numerals: 1. a ladder beam; 2. a foot pedal; 3. a storage box; 4. a locking member; 5. a support plate; 6. a mounting seat; 7. a hinged lever; 8. a limiting component; 81. a ratchet wheel; 82. a pawl; 9. a connecting rod; 10. an elastic pad; 11. a groove; 12. a decorative plate; 13. a locking groove; 14. and (7) a decorative layer.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a folding stair. Referring to fig. 1 and 2, the folding type stair comprises a ladder beam 1 which is obliquely arranged and a plurality of pedals 2 which are arranged on one side of the ladder beam 1 far away from the ground, wherein the pedals 2 are arranged at intervals along the oblique direction of the ladder beam 1, the pedals 2 are fixedly connected in the ladder beam 1 through screws, and the ladder beam 1 communicates a public area with a private space through the pedals 2; articulated containing box 3 that is provided with in one side of ladder roof beam 1, containing box 3 keep away from one side of ladder roof beam 1 and establish through the built-in fitting and install on the wall body, and containing box 3 keeps away from one side protrusion wall body setting of wall body, is provided with retaining member 4 that is used for locking ladder roof beam 1 on the wall body on the frame of containing box 3 protrusion wall body.

When needs use stair, only need with ladder beam 1 from storage box 3 in unblock, then to the direction of keeping away from the wall body rotation ladder beam 1 for running-board 2 exposes, and storage box 3 is passed through to one side of ladder beam 1 and installs on the wall body, the both ends of opposite side respectively with the floor butt in public area and private space, make the people can pass through a plurality of running-board 2 and come and go to public area and private space two places. When not needing to use stair, only need rotate ladder beam 1 towards the wall body direction, ladder beam 1 drives a plurality of running-boards 2 and rotates to containing box 3 in, uses retaining member 4 to lock ladder beam 1 in containing box 3 at last, and stair are accomodate in the containing box 3 of installing on the wall body this moment, have reduced the space occupancy of stair.

Referring to fig. 1 and 2, a supporting plate 5 is fixedly connected to one side of the ladder beam 1 close to the ground through screws, and the supporting plate 5 can shield a gap between two adjacent pedals 2, so that articles can be prevented from falling from the gap between the two adjacent pedals 2 as far as possible to hurt people.

Referring to fig. 1 and 2, one side of backup pad 5 near containing box 3 end frame has a plurality of mount pads 6 through the screw rigid coupling, a plurality of mount pads 6 set up along 1 incline direction interval of ladder roof beam, the quantity of mount pad 6 can be confirmed according to the length size of ladder roof beam 1, in this application embodiment, mount pad 6 is provided with threely, be provided with hinge bar 7 on the backup pad 5, hinge bar 7 runs through three mount pad 6 in proper order, and hinge bar 7 and 6 rigid couplings of mount pad, hinge bar 7's both ends all rotate with the frame at containing box 3 both ends respectively through the bearing and are connected.

The mounting seat 6 is fixedly arranged on the ladder beam 1 through the supporting plate 5, the hinge rod 7 is hinged to the storage box 3 through one side of the ladder beam 1 through the mounting seat 6, when stairs are not needed to be used, the ladder beam 1 only needs to be rotated towards the direction of a wall body, the ladder beam 1 drives the mounting seat 6 to rotate through the supporting plate 5, the mounting seat 6 drives the hinge rod 7 to rotate, and the ladder beam 1 is rotated and stored in the storage box 3 at the moment.

For the sight that improves the coincide formula stair, refer to fig. 1 and fig. 2, be provided with decorative board 12 on the inner wall that containing box 3 is parallel with the wall body, the size of decorative board 12 and the size adaptation of the size in the 3 cavities of containing box, decorative board 12 can be one, also can be a plurality of, in this application embodiment, decorative board 12 is provided with a plurality ofly, the setting of a plurality of decorative boards 12, can reduce the installation degree of difficulty of decorative board 12 on the one hand, on the other hand when decorative board 12 part damages, only need to be changed one of them decorative board 12 unit can, energy-concerving and environment-protective effect has. The end surface of the support plate 5 far away from the pedal plate 2 is provided with a decorative layer 14, and the decorative layer 14 can be a mural or a photo frame; when needs use stair, towards keeping away from wall body direction and rotating ladder beam 1, decorative board 12 in containing box 3 exposes this moment, when need not use stair, towards being close to wall body direction and rotating ladder beam 1 for behind ladder beam 1 is accomodate the locking in containing box 3, decorative layer 14 exposes, makes no matter the folding stair all have the sight under the state of being opened or being drawn in.

In order to lock the ladder beam 1 in the storage box 3 quickly, referring to fig. 1 and 2, in the embodiment of the present application, the locking members 4 are provided as pins, the pins are located on the frames at the two ends of the storage box 3, the screw threads of the pins penetrate through the frames at the two ends of the storage box 3, the number of the pins at the end of the storage box 3 can be one or multiple, and three pins are provided at the two ends of the storage box 3 to improve the stability of locking the ladder beam 1. The supporting plate 5 is close to and all sets up the locking groove 13 with pin joint on the terminal surface of containing box 3 both ends frame, and locking groove 13 sets up to the thread groove, the screw thread portion of pin through with the internal thread interlock in the locking groove 13 for ladder roof beam 1 is by stable locking in containing box 3.

When the ladder beam 1 is locked in the containing box 3, only the pin needs to be rotated, moves towards the direction of the supporting plate 5 and is inserted into the locking groove 13, and the interaction between the pin and the locking groove 13 enables the ladder beam 1 to be stably locked in the containing box 3; and the pins are located at both ends of the storage box 3 so that the ladder beam 1 can be locked in the storage box 3 regardless of whether a person is at a public area or a private space.

In order to improve the stability of the engagement between the threaded portion of the pin and the internal thread of the locking groove 13, referring to fig. 1 and 2, the decorative plate 12 is elastically connected to the inner wall of the storage box 3 by a spring, and the decorative plate 12 is movable toward/away from the wall by the connection of the spring.

When being close to wall body direction rotation terraced roof beam 1, terraced roof beam 1's border and decorative board 12 butt and promote decorative board 12 and move towards being close to the wall body direction, the spring is compressed this moment, the spring elasticity after producing deformation acts on decorative board 12, make decorative board 12 promote terraced roof beam 1 and move towards keeping away from the wall body direction, make backup pad 5 go up the circular arc inner wall of locking groove 13 and the inseparable butt of circular arc perisporium of pin, and then make the pin by stable connection in locking groove 13.

In order to improve the stability of the stair in use, referring to fig. 2 and 3, the end face, away from the pedal 2, of the support plate 5 is fixedly connected with one or more elastic pads 10 through screws, in the embodiment of the present application, the number of the elastic pads 10 is the same as that of the mounting seats 6, the elastic pads 10 correspond to the mounting seats 6 one by one, and the elastic pads 10 are located on one side, away from the inner frame of the storage box 3, of the hinge rod 7; the bottom frame of the containing box 3 is provided with a groove 11 for splicing and adapting with the elastic cushion 10.

When the supporting plate 5 rotates to be parallel to the bottom frame of the containing box 3, the plurality of pedals 2 on the ladder beam 1 are all parallel to the ground, the stair is completely unfolded, one end, far away from the supporting plate 5, of the elastic cushion 10 is inserted into the groove 11 and abutted against the bottom wall of the groove 11, the supporting plate 5 is stably supported in the bottom frame of the containing box 3 through the arrangement of the elastic cushion 10, and the hinged rod 7 is prevented from being broken as far as possible; simultaneously the cushion 10 is pegged graft and is makeed the relative containing box 3 end frames's of backup pad 5 position stability in recess 11, has avoided backup pad 5 to drive ladder roof beam 1 to rock along 7 length dimension directions of hinge bar as far as, has further ensured the stability when stair use.

For avoiding when rotating ladder beam 1, lead to ladder beam 1 towards keeping away from the wall body direction free rotation and hinder the problem emergence of people because of the staff is smooth, refer to fig. 2 and 3, be provided with the spacing subassembly 8 that is used for restricting articulated mast 7 free rotation in the containing box 3, spacing subassembly 8 is provided with a plurality ofly, a plurality of spacing subassemblies 8 set up along articulated mast 7 length direction interval, spacing subassembly 8 includes ratchet 81 of coaxial rigid coupling on articulated mast 7 and the pawl 82 with ratchet 81 butt, pawl 82 is located articulated mast 7 and keeps away from one side of cushion 10, pawl 82 is through spring elastic connection on containing box 3 base frame.

When not needing to use stair, only need to rotate terraced roof beam 1 towards the wall body direction, terraced roof beam 1 drives hinge lever 7 through backup pad 5 and mount pad 6 and rotates, hinge lever 7 drives ratchet 81 and rotates, because pawl 82 elastic connection is on containing box 3 bottom frame, so hinge lever 7 can drive ratchet 81 and rotate towards a direction, and another rotation direction of ratchet 81 is locked, make the people can order about terraced roof beam 1 and rotate towards the direction that is close to the wall body and be accomodate to containing box 3 in, and ratchet 81 and pawl 82's locking effect has restricted terraced roof beam 1 independently towards the rotation of keeping away from the wall body direction, avoided terraced roof beam 1 to rotate towards the direction that is close to ground under the action of gravity as far as possible and injure people. Meanwhile, after the ladder beam 1 rotates into the storage box 3, the ladder beam 1 is stably locked in the storage box 3 due to the clamping of the ratchet 81 and the pawl 82 and the connection action of the pin and the locking groove 13.

For improving the efficiency of stair expansion, refer to fig. 2 and 3, the rigid coupling has connecting rod 9 between a plurality of pawls 82, and connecting rod 9 and hinge bar 7 parallel arrangement, the both ends of connecting rod 9 all slide respectively through the slider and connect on the frame at containing box 3 both ends, and connecting rod 9 is used for driving a plurality of pawls 82 and moves towards the direction of keeping away from ratchet 81 in step.

When the stair needs to be used, the connecting rods 9 drive the plurality of pawls 82 to synchronously move towards the direction far away from the ratchet 81, so that the pawls 82 are not abutted to the ratchet 81 any more, then the ladder beam 1 is rotated towards the direction far away from the wall, the ladder beam 1 drives the hinge rod 7 to rotate, the hinge rod 7 drives the ratchet 81 to rotate, and the ladder beam 1 can be quickly rotated out of the accommodating box 3; the arrangement of the connecting rod 9 enables the plurality of ratchet wheels 81 to be unlocked synchronously, and the effect of improving the stair unfolding efficiency is achieved.

The implementation principle of the folding stair of the embodiment of the application is as follows: when need not use stair, towards being close to wall body direction and rotating ladder beam 1, ladder beam 1 drives hinge bar 7 through backup pad 5 and mount pad 6 and rotates, ladder beam 1's border and decorative board 12 butt and promote decorative board 12 towards being close to the motion of wall body direction, after ladder beam 1 rotates to containing box 3, rotate the pin, the pin moves towards backup pad 5 direction and inserts in the locking groove 13, the pin makes ladder beam 1 by stable locking in containing box 3 with the interact of locking groove 13, the space occupancy of stair has been reduced.

When needs use stair, with ladder beam 1 unblock in the containing box 3 earlier, rethread connecting rod 9 orders about a plurality of pawls 82 and moves towards the direction of keeping away from ratchet 81 in step for pawl 82 no longer with the ratchet 81 butt, then rotates ladder beam 1 towards the direction of keeping away from the wall body, and ladder beam 1 drives hinge bar 7 and rotates, and hinge bar 7 drives ratchet 81 and rotates, makes ladder beam 1 can follow the containing box 3 fast and roll out.

When backup pad 5 changes to being parallel with containing box 3 base frame, a plurality of running-boards 2 on the ladder roof beam 1 all are parallel with ground, the stair are unfolded completely, the one end that backup pad 5 was kept away from to cushion 10 this moment is pegged graft in recess 11 and with recess 11 diapire butt, make ladder roof beam 1 and running-board 2 by stable support on containing box 3 base frame, running-board 2 exposes this moment, install on the wall body through containing box 3 in one side of ladder roof beam 1, the both ends of opposite side respectively with the floor butt of public region and private space, make the people can come and go to public region and private space two places through a plurality of running-boards 2.

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.