Assembled stair handrail and handrail corner device

Abstract

The utility model discloses an assembled stair handrail and a handrail corner device. The corner device comprises a first interface, a second interface and a third interface which are vertically arranged; the second connector is located above the side, close to the stair steps, of the stair rest platform, one end of the second connector faces the stair steps and is parallel to the stair steps, and the other end of the second connector is provided with a third connector. The first interface is mounted at the bottom of the second interface, and the connecting end of the first interface is arranged downwards; the third connector rotates around the connecting position of the third connector and the second connector, and the third connector is parallel to a rest platform of the stair. The first connector, the second connector and the third connector are vertically arranged, connection of stair handrails at the corners formed by the stair rest platform and stair steps is achieved, natural transition connection between handrails with different inclination angles is achieved by arranging the third connector to rotate around the connecting position of the third connector and the second connector, and the connecting structure is simple in structure and convenient to use. The assembled stair handrail and the handrail corner device are convenient to install.

Description

TECHNICAL FIELD

[0001] The utility model relates to stair handrail technical field, concretely is a kind of assembled stair handrail and handrail corner device. BACKGROUND

[0002] In the field of construction, stair railing as the key facility to ensure the safety of personnel going up and down the stairs, the rationality of its design and installation is crucial. The traditional stair railing is mostly installed by welding, which makes installation and later maintenance inconvenient. To solve the problem of traditional welded stair railing, some assembled stair railings have emerged. For example, a kind of assembled stair railing convenient to install is disclosed in Chinese patent with publication number CN211200974U. The railing is provided with a handrail long pipe on the upper part of the stand column, a handrail turning pipe is provided at both ends of the handrail long pipe, and an interface and a hinged connecting piece are provided on the handrail turning pipe, realizing the rotary connection of the handrail long pipe and the handrail short pipe, and to some extent, the stair railing can adapt to stairs of different angles. At the same time, the fixed hole is provided to facilitate the fixation of the handrail on the stand column, avoiding welding work.

[0003] Although the above-mentioned scheme solves the problem of inconvenient installation of welded stair railing and the problem of slope adaptation, the handrail turning device needs to use screws as rotating shafts to adjust the angle of long handrail. In the actual installation process, a lot of time is spent on the installation and adjustment of bolts, which is complicated to operate and reduces the construction efficiency. SUMMARY

[0004] The present application provides a kind of handrail corner device, by first interface, second interface and third interface vertical arrangement, realize the connection of the corner of stair rest platform and stair step formed to stair handrail, by setting third interface can rotate around the junction with second interface, realize the natural transition connection between handrails of different inclination angles, to solve the above-mentioned prior art, handrail turning device needs screw to use bolt as rotating shaft to adjust the angle of long handrail, when installing, a lot of time is spent on the installation and adjustment of bolt, which is complicated to operate and leads to low construction efficiency. Specific scheme is as follows:

[0005] A kind of handrail corner device, the corner device is located above the junction of stair rest platform and stair step, the corner device includes vertically arranged first interface, second interface and third interface;

[0006] The second interface is located above the side of stair rest platform close to stair step, one end of the second interface is towards stair step and parallel to stair step, and the other end of the second interface is provided with third interface;

[0007] The first interface is installed at the bottom of the second interface, and the connecting end of the first interface is arranged downward.

[0008] The third interface rotates around the connection with the second interface, and the third interface is parallel to the rest platform of the staircase.

[0009] Preferably, the second interface and the third interface extend outward along the extension direction at the end close to each other to form the first connection part and the second connection part, respectively.

[0010] The first connection part and the second connection part are in L-shaped structure with the opening opposite to each other.

[0011] The end of the second connection part away from the third interface is mounted at the opening of the L-shaped structure of the first connection part, and rotates around the connection.

[0012] Preferably, the mounting surface of the second connection part and the first connection part is respectively provided with a circular ring-shaped connection groove and a circular ring-shaped connection protrusion.

[0013] The circular ring-shaped connection protrusion is mounted in the circular ring-shaped connection groove to realize the rotation of the second connection part around the connection with the first connection part.

[0014] Preferably, the connection groove includes a limiting groove and a rotating groove arranged along the extension direction of the end surface of the second connection part towards the first connection part.

[0015] The limiting groove is located outside the rotating groove, and the limiting groove and the rotating groove are in communication in the axial direction, and the limiting groove includes a circular connection groove and a radial limiting groove arranged concentrically.

[0016] The radial limiting groove is partially coincident with the circular connection groove, and the two are in communication with each other, the radial limiting groove is located outside the rotating groove, the radial limiting groove is in communication with the rotating groove, and the two are arranged coaxially, and the maximum cross-sectional dimension of the radial limiting groove is greater than the cross-sectional dimension of the circular connection groove.

[0017] The cross-sectional dimension of the rotating groove is greater than the maximum cross-sectional dimension of the radial limiting groove.

[0018] Preferably, the connection protrusion is matched with the shape and size of the connection groove.

[0019] Preferably, the end surface of the inner side of the end surface of the first connection part towards the third interface is a circular arc-shaped recessed surface, and the end surface of the outer side of the end surface of the second connection part towards the second interface is a circular arc-shaped protruding surface matched with the arc of the circular arc-shaped recessed surface.

[0020] Preferably, the end of the second interface towards the staircase step is consistent with the overall slope of the staircase step.

[0021] An assembled stair handrail, comprising: a stair step handrail assembly, a stair rest platform handrail assembly, and a handrail corner device;

[0022] The handrail corner device connects the stair step handrail assembly and the stair rest platform handrail assembly respectively.

[0023] Preferably, the stair step handrail assembly comprises a plurality of first vertical columns vertically arranged on stair steps, a plurality of step vertical columns between adjacent two first vertical columns, an inclined surface pipe handrail above the first vertical columns, and inclined horizontal columns at both ends of the step vertical columns.

[0024] The bottom end of the first vertical column is connected to the stair step, and the top end of the first vertical column is connected to the inclined surface pipe handrail; the two ends of the step vertical column are connected to the inclined horizontal column, and the two ends of the inclined horizontal column are connected to the adjacent two first vertical columns.

[0025] The stair rest platform handrail assembly comprises a plurality of second vertical columns vertically arranged on the rest platform, a plurality of platform vertical columns between adjacent two second vertical columns, a horizontal surface pipe handrail above the second vertical columns, and horizontal columns at both ends of the platform vertical columns.

[0026] The bottom end of the second vertical column is connected to the rest platform, and the two ends of the platform vertical column are connected to the horizontal column, and the two ends of the horizontal column are connected to the adjacent two second vertical columns.

[0027] The first interface of the handrail corner device is connected to the top end of the second vertical column, one end of the second interface of the handrail corner device is connected to the inclined surface pipe handrail, the other end of the second interface of the handrail corner device is connected to the third interface, and the end of the third interface opposite to the second interface is connected to the horizontal surface pipe handrail.

[0028] Compared with the prior art, the application has the following beneficial effects:

[0029] The handrail corner device of the present application realizes the connection of the stair handrail at the corner formed by the stair rest platform and the stair step by vertically arranging the first interface, the second interface and the third interface, and rotating the third interface around the connection with the second interface, and realizes the installation of the stair handrail through a simple structure; meanwhile, the second interface is above the side of the stair rest platform close to the stair step, one end of which is parallel to the stair step, and can better fit the slope of the stair step; the third interface can rotate around the connection with the second interface and is parallel to the stair rest platform, and can more flexibly and accurately adapt to the structure of the connection between the stair rest platform and the stair step, realizes the natural transition connection between handrails with different inclination angles, improves the overall applicability of the stair handrail, avoids the increase of the connection fittings due to the different inclination angles of the handrails of different staircases, and reduces the construction difficulty.

[0030] In the present application, the second interface and the third interface close to the end are matched by specific L-shaped structure, circular ring connecting groove and protrusion, connecting groove and connecting protrusion, etc. to realize angle adjustment, without complex bolt connection structure, avoiding the use of a large number of complex connection fittings due to the different inclination angles of the handrails of different staircases, and significantly reducing the construction difficulty.

[0031] In the present application, the angle of the inclined handrail is adjusted by the connection of the clamping grooves of the two clamping pieces in the handrail corner device, reducing the use of bolt pins. In the actual installation process, only the parts such as the first column, the second column, the inclined surface pipe handrail and the horizontal surface pipe handrail are connected through the corresponding interfaces, and then fixed with self-tapping screws, so that the installation steps are simplified, and the installation efficiency is greatly improved. At the same time, the use of complex parts is reduced, and the production cost is reduced.

[0032] In the present application, the circular ring connecting groove and the circular ring protrusion of the first connecting part and the second connecting part are matched, and the connecting groove and the connecting protrusion are accurately positioned, so that the position of the third interface is closely connected when rotating around the second interface. Moreover, the circular arc concave surface of the first connecting part and the circular arc protruding surface of the second connecting part are matched with each other, not only playing an auxiliary role when rotating, but also making the overall structure more compact, and increasing the aesthetic property of the handrail. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a structural schematic view of the assembled stair handrail of the present application;

[0034] Figure 2 It is an assembly schematic view of the handrail corner device in the handrail of the present application;

[0035] Figure 3 This is an exploded structural diagram of the handrail corner device of this utility model;

[0036] Figure 4 This is a schematic diagram showing the connection between the connecting groove and the connecting protrusion in the handrail corner device of this utility model;

[0037] Figure 5 This is a schematic diagram showing the position of the connecting protrusion and the connecting groove in the handrail corner device of this utility model after the angle has been adjusted;

[0038] In the diagram: 1. First column; 2. Second column; 3. Inclined horizontal railing; 4. Step vertical railing; 5. Horizontal horizontal railing; 6. Platform vertical railing; 7. Inclined tube handrail; 8. Handrail corner device; 9. Horizontal tube handrail; 21. First interface; 22. Self-tapping screw; 71. Second interface; 91. Third interface; 81. Radial limiting groove; 82. Circular connecting groove; 83. Circular raised edge; 84. Arc-shaped concave surface; 85. Larger end; 86. Smaller end; 87. Groove; 88. Arc-shaped raised surface; 89. Rotation groove. Detailed Implementation

[0039] As attached Figure 2 The handrail corner device shown is located above the connection between the stair landing and the stair tread. The handrail corner device 8 includes a first interface 21, a second interface 71 and a third interface 91 that are vertically arranged.

[0040] The second interface 71 is located above the side of the stair landing near the stair treads. One end of the second interface 71 faces the stair treads and is parallel to the stair treads. The other end of the second interface 71 is equipped with a third interface 91.

[0041] The first interface 21 is installed at the bottom of the second interface 72, with the connection end of the first interface 21 facing downwards;

[0042] The third interface 91 rotates around the connection point with the second interface 71, and the third interface 91 is parallel to the landing of the staircase.

[0043] As attached Figure 1 As shown, the assembled stair handrail described in this application includes: a stair tread handrail assembly, a stair landing handrail assembly, and the handrail corner device 8;

[0044] The handrail corner device 8 is connected to the stair step handrail assembly and the rest platform handrail assembly of the stair, respectively. Preferably, the stair step handrail assembly comprises a plurality of first vertical columns 1 arranged vertically on the stair steps, a plurality of step vertical columns 4 arranged between adjacent two first vertical columns 1, an inclined surface pipe handrail 7 arranged above the first vertical column 1, and an inclined horizontal column 3 arranged at both ends of the step vertical column 4;

[0045] The rest platform handrail assembly of the stair comprises a plurality of second vertical columns 2 arranged vertically on the rest platform, a plurality of platform vertical columns 6 arranged between adjacent two second vertical columns 2, a horizontal surface pipe handrail 9 arranged above the second vertical column 2, and a horizontal horizontal column 5 arranged at both ends of the platform vertical column 6;

[0046] The top end of the first vertical column 1 is connected to the inclined surface pipe handrail 7, and the bottom end of the first vertical column 1 is connected to the stair step away from the wall through a bolt, and the inclined horizontal column 3 and the step vertical column 4 are arranged between adjacent two first vertical columns 1.

[0047] The inclined horizontal column 3 is arranged between the stair step and the inclined surface pipe handrail 7 and is parallel to the stair step and the inclined surface pipe handrail 7, respectively. The two ends of the inclined horizontal column 3 are connected to adjacent two first vertical columns 1, respectively. The inclined horizontal column 3 is provided with two, and the two inclined horizontal columns 3 are arranged at the top end and the bottom end of the step vertical column 4, respectively. A plurality of step vertical columns 4 are arranged uniformly along the extension direction of the inclined horizontal column 3, and the top end and the bottom end are connected to the inclined horizontal column 3, respectively.

[0048] The second vertical column 2 is provided with at least two, and the top of the two second vertical columns 2 is provided with a horizontal surface pipe handrail 9. The rest platform vertical column 6 and the rest platform horizontal column 5 are arranged between the two second vertical columns 2, respectively. The rest platform horizontal column 5 is provided with two, and the two rest platform horizontal columns 5 are parallel to the stair rest platform and are arranged at the top end and the bottom end of the rest platform vertical column 6, respectively. The two ends of the two rest platform horizontal columns 5 are connected to adjacent two second vertical columns 2, respectively. The top end and the bottom end of the rest platform vertical column 6 are connected to the two rest platform horizontal columns 5, respectively.

[0049] The horizontal surface pipe handrail 9 is parallel to the stair rest platform, and the two ends of the horizontal surface pipe handrail 9 point to the end of the two stair steps adjacent to the stair rest platform. The horizontal surface pipe handrail 9 is arranged at the top end of the two second vertical columns 2. The bottom end of the second vertical column 2 is connected to the stair rest platform away from the wall through a bolt. The handrail corner device 8 of the application is arranged between the second vertical column 2, the horizontal surface pipe handrail 9, and the inclined surface pipe handrail 7. The top end of the second vertical column 2 is connected to the horizontal surface pipe handrail 9 and the inclined surface pipe handrail 7, respectively. The connection relationship is that:

[0050] The handrail corner device 8 comprises a first interface 21, a second interface 71 and a third interface 91, which are perpendicular to each other. The first interface 21 is sleeved on the top end of the second stand column 2; one end of the second interface 71 is sleeved on the end of the inclined surface pipe handrail 7 close to it, and the other end of the second interface 71 is connected with the third interface 91, and the end of the third interface 91 away from the second interface 71 is connected with the end of the horizontal surface pipe handrail 9 close to it. After the first interface 21, the second interface 71 and the third interface 91 are respectively sleeved on the corresponding end portions of the second stand column 2, the inclined surface pipe handrail 7 and the horizontal surface pipe handrail 9, they are completely fixed by using self-tapping screws 22 respectively, and the screw head of the self-tapping screw 22 is provided with a "cross" groove to facilitate installation.

[0051] Further, the end close to the second interface 71 and the third interface 91 respectively extends outward along the extension direction to form a first connecting portion and a second connecting portion;

[0052] The first connecting portion and the second connecting portion respectively have an open L-shaped structure;

[0053] The end of the second connecting portion away from the third interface 91 is installed at the opening of the L-shaped structure of the first connecting portion, and rotates along the connecting portion.

[0054] It should be noted that:

[0055] In the present application, since the second interface 71 and the third interface 91 are connected perpendicularly, and the third interface 91 can rotate around the connecting portion with the second interface 71, in order to realize the adjustment of the angle of the connecting portion between the second interface 71 and the third interface 91 without interference between them, the end connecting the second interface 71 and the third interface 91 is set to have an open L-shaped structure (i.e. the inner side of the end close to them is a notch surface), so that the second interface 71 and the third interface 91 can form an L shape when connected.

[0056] Further, the mounting surface of the second connecting portion and the first connecting portion is respectively provided with a circular ring-shaped connecting groove and a circular ring-shaped connecting protrusion;

[0057] The circular ring-shaped connecting protrusion is installed in the circular ring-shaped connecting groove, so as to realize the rotation of the second connecting portion around the connecting portion with the first connecting portion.

[0058] It should be noted that:

[0059] In the present application, in order to facilitate the adjustment of the angle of the connecting portion between the third interface 91 and the second interface 71, reference is made to Figure 3At the end of the second interface 71 facing the third interface 91, the end surface edge perpendicular to the third interface 91 extends outward along the axial direction with a circular annular connecting protrusion (i.e. the circular protruding edge 83), and at the end of the third interface 91 facing the second interface 71 and the end surface perpendicular to the second interface 71 extends inward along the axial direction with a circular annular connecting groove (i.e. the groove 87); the circular protruding edge 83 is movably connected with the groove 87, and the groove 87 cooperates with the circular protruding edge 83 to play a radial limiting role, and at the same time plays an auxiliary role that the third interface 91 can rotate around the connection with the second interface 71.

[0060] Further, the mounting surface of the second connecting part provided with the circular annular connecting protrusion is provided with a connecting groove; the mounting surface of the first connecting part provided with the circular annular connecting groove is provided with a connecting protrusion matched with the connecting groove.

[0061] The connecting protrusion is connected on the second connecting part, and the connecting protrusion is inserted into the connecting groove.

[0062] It should be noted that:

[0063] In an embodiment of the present application, the connecting groove is arranged on the end surface (i.e. the end surface perpendicular to the second interface 71) of the second connecting part facing the first connecting part, and the connecting groove includes a limiting groove and a rotating groove 89 arranged along the extension direction of the end surface of the second connecting part facing the first connecting part.

[0064] The limiting groove is located outside the rotating groove 89, and the limiting groove is in communication with the rotating groove in the axial direction; the limiting groove includes a circular connecting groove 82 and a radial limiting groove 81 arranged concentrically.

[0065] The radial limiting groove 81 is partially coincident with the circular connecting groove 82 and in communication with each other, the radial limiting groove 81 is located outside the rotating groove, the radial limiting groove 81 is in communication with the rotating groove 89 and arranged coaxially, and the maximum cross-sectional dimension of the radial limiting groove 81 is greater than the cross-sectional dimension of the circular connecting groove 82.

[0066] The cross-sectional dimension of the rotating groove 89 is greater than the maximum cross-sectional dimension of the radial limiting groove 81, the rotating groove 89 is a circular groove, and the radial limiting groove 81 is a square groove or an elliptical groove.

[0067] Further, the connecting protrusion is matched with the shape and size of the connecting groove.

[0068] It should be noted that:

[0069] In an embodiment of the present application, the connecting protrusion is in the shape of a "convex" as a whole, wherein the small end 86 is close to the end surface of the second interface 71 (i.e. the end surface provided with the groove 87) perpendicular to the third interface 91, and the large end 85 is located on the side of the small end 86 away from the third interface 91; the small end 86 and the large end 85 are both in the shape of a square block and are integrally formed with the third interface 91; the size of the small end 86 matches the size of the circular connecting groove 82, and the small end 86 cooperates with the circular connecting groove 82 to serve as a rotating shaft; the size of the large end 85 matches the size of the radial limiting groove 81 in the connecting groove; when the large end 85 is installed, it passes into the rotating groove 89 (as shown in Figure 4 ). Figure 5 .

[0070] Further, the end surface of the first connecting part towards the inner side of the end surface of the third interface 91 is a circular arc recessed surface 84, and the end surface of the second connecting part towards the outer side of the end surface of the second interface 71 is a circular arc protruding surface 88 matching the arc of the circular arc recessed surface 84.

[0071] It should be noted that:

[0072] In the present application, the end surface of the first connecting part towards the inner side of the end surface of the third interface 91 refers to the side wall of the end surface provided with the circular convex edge 83 towards the third interface 91, and the end surface of the second connecting part towards the outer side of the end surface of the second interface 71 refers to the side wall of the end surface provided with the groove 87 away from the second interface 71, so as to realize the rotation of the circular arc protruding surface 88 in the circular arc recessed surface 84 when the connecting protrusion is inserted into the connecting groove for rotation.

[0073] Further, the end of the second interface 71 towards the stair step is consistent with the overall slope of the stair step.

[0074] Further, refer to Figure 2 and Figure 3 In order to enhance the safety of the assembled stair railing, the present application is provided with an arc-shaped chamfer on the edges of the inclined surface pipe handrail 7, the handrail corner device 8 and the horizontal surface pipe handrail 9.

[0075] The installation process of the present application is as follows: when installing the assembled stair railing, first, the first column 1 and the second column 2 are respectively installed on the stair step and the resting platform by mechanical bolts; the two ends of the inclined horizontal rail 3 are respectively installed on two adjacent first columns 1 or on an adjacent first column 1 and a second column 2; the two ends of the step vertical rail 4 are respectively inserted between two rows of inclined horizontal rails 3 which are consistent with the slope of the stair step; the two ends of the horizontal horizontal rail 5 are respectively installed on two adjacent second columns 2; the two ends of the resting platform vertical rail 6 are respectively inserted between two adjacent second columns 2 and between two rows of horizontal horizontal rails 5 which are parallel to the resting platform; then the first interface 21 of the corner device 8 of the handrail is sleeved on the top end of the second column 2, fixed by using a self-tapping screw, the inclined surface pipe handrail 7 is inserted into the second interface 71 and fixed by using a self-tapping screw 22, the connection between the inclined surface pipe handrail 7 and the first column 1 is sequentially performed, the horizontal surface pipe handrail 9 is inserted into the third interface 91 and fixed by using a self-tapping screw 22, and the installation of the stair railing of the multi-layer stair is completed in sequence.

Claims

1. A handrail corner device, wherein the corner device is located above the connection between the stair landing and the stair tread, characterized in that, The cornering device includes a first interface, a second interface, and a third interface that are vertically arranged. The second interface is located above the side of the stair landing near the stair treads. One end of the second interface faces the stair treads and is parallel to the stair treads. The other end of the second interface is equipped with a third interface. The first interface is installed at the bottom of the second interface, with the connection end of the first interface facing downwards; The third interface rotates around the connection point with the second interface, and the third interface is parallel to the landing of the staircase.

2. The handrail corner device according to claim 1, characterized in that, The second and third interfaces extend outward along the extension direction to form a first connecting part and a second connecting part, respectively; The first connecting part and the second connecting part are respectively L-shaped structures with openings facing each other; The end of the second connecting part facing away from the third interface is installed at the opening of the L-shaped structure of the first connecting part and rotates along the connecting part.

3. The handrail corner device according to claim 2, characterized in that, The mounting surfaces of the second connecting part and the first connecting part are respectively provided with a matching annular connecting groove and an annular connecting protrusion; The annular connecting protrusion is installed in the annular connecting groove to enable the second connecting part to rotate around the connection point between it and the first connecting part.

4. The handrail corner device according to claim 3, characterized in that, The second connecting part has a connecting groove on its mounting surface with an annular connecting protrusion; the first connecting part has a connecting protrusion on its mounting surface with an annular connecting groove that matches the connecting groove. The connecting protrusion is connected to the second connecting part and is inserted into the connecting groove.

5. The handrail corner device according to claim 4, characterized in that, The connecting groove includes a limiting groove and a rotating groove provided along the extension direction of the end face of the second connecting portion toward one end of the first connecting portion; The limiting groove is located outside the rotating groove, and the limiting groove is connected to the rotating groove in the axial direction. The limiting groove includes a concentric circular connecting groove and a radial limiting groove. The radial limiting groove overlaps with the circular connecting groove and the two are interconnected. The radial limiting groove is located outside the rotating groove. The radial limiting groove is connected to the rotating groove and the two are coaxially arranged. The maximum cross-sectional dimension of the radial limiting groove is greater than the cross-sectional dimension of the circular connecting groove. The cross-sectional dimension of the rotating groove is larger than the maximum cross-sectional dimension of the radial limiting groove.

6. The handrail corner device according to claim 4, characterized in that, The shape and size of the connecting protrusion are adapted to the connecting groove.

7. The handrail corner device according to claim 2, characterized in that, The inner end face of the first connecting part facing the third interface is a concave arc-shaped surface, and the outer end face of the second connecting part facing the second interface is a convex arc-shaped surface that matches the curvature of the concave arc-shaped surface.

8. The handrail corner device according to claim 1, characterized in that, The second interface faces One end of the stair tread should be aligned with the overall slope of the stair tread.

9. An assembled stair handrail, characterized in that, The stair handrail includes: a stair tread handrail assembly, a stair landing handrail assembly, and a handrail corner device as described in any one of claims 1 to 8; The handrail corner device is connected to the stair tread handrail assembly and the stair landing handrail assembly, respectively.

10. A modular stair handrail according to claim 9, characterized in that, The stair tread handrail assembly includes a plurality of first columns vertically arranged on the stair tread, a plurality of step rails located between two adjacent first columns, an inclined surface tube handrail located above the first columns, and an inclined horizontal rail located at both ends of the step rails. The bottom of the first column is connected to the stair treads, and the top of the first column is connected to the inclined tube handrail; the two ends of the vertical railing of the treads are respectively inclined horizontal railings, and the two ends of the inclined horizontal railings are respectively connected to two adjacent first columns. The staircase rest platform handrail assembly includes several second columns vertically arranged on the rest platform, several platform vertical rails located between two adjacent second columns, a horizontal tube handrail located above the second columns, and horizontal rails located at both ends of the platform vertical rails. The bottom of the second column is connected to the rest platform; the two ends of the platform vertical railing are connected to two horizontal railings, and the two ends of the horizontal railings are connected to two adjacent second columns. The first interface of the handrail corner device is connected to the top of the second column, one end of the second interface of the handrail corner device is connected to the inclined tube handrail, the other end of the second interface of the handrail corner device is connected to the third interface, and the end of the third interface facing away from the second interface is connected to the horizontal tube handrail.

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