CN114150928B

CN114150928B - Protective railing

Info

Publication number: CN114150928B
Application number: CN202111599164.7A
Authority: CN
Inventors: 王立勇; 程水添; 梁庆华; 张国雄; 陈剑文; 许江移; 杜辉; 黄远东; 钟文; 吴艳萍; 梁慧; 陈志华; 魏武林
Original assignee: Guangdong Power Grid Co Ltd; Huizhou Power Supply Bureau of Guangdong Power Grid Co Ltd
Current assignee: Guangdong Power Grid Co Ltd; Huizhou Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2023-04-07
Anticipated expiration: 2041-12-24
Also published as: CN114150928A

Abstract

The invention relates to the technical field of electric power engineering and discloses a protective railing. The protective barrier comprises at least two barrier components, wherein two ends of one of the two adjacent barrier components are provided with fastening components, the fastening components are provided with first threaded holes, and the fastening components can selectively rotate relative to the barrier components or are limited at preset positions of the barrier components; the two ends of the other one of the two adjacent railing assemblies are provided with connecting pieces, the connecting pieces can rotate relative to the railing assemblies, one ends, opposite to the fastening assemblies, of the connecting pieces are provided with threads, and the connecting pieces are in threaded connection with the fastening assemblies so as to connect the two adjacent railing assemblies. After the two railing components are connected and fixed, the erection angle between two adjacent railing components can be adjusted, the connecting piece does not need to be unscrewed, and the connecting piece and the fastening component are both connected onto the railing components, so that the railing components can be effectively prevented from being lost.

Description

Protective railing

Technical Field

The invention relates to the technical field of electric power engineering, in particular to a protective railing.

Background

In the process of power construction or maintenance, a protective barrier must be erected on a construction site for safety, so that non-construction personnel can be effectively prevented from entering the power construction or maintenance site. In order to facilitate the transportation of the guard rail, the guard rail is usually divided into a plurality of sections, which are disassembled for transportation and assembled and connected when arriving at a construction site. At present, bolts or bolts are usually adopted for connecting each section of the guard rails, the bolts or bolts are independently configured, the situation that the bolts or the bolts are lost frequently occurs, and when the angle between the guard rails is adjusted, the bolts or the bolts need to be unscrewed, so that the operation is complex.

Disclosure of Invention

The invention aims to provide a protective handrail, which solves the problems that the existing bolt or screw for connecting the protective handrail is easy to lose and the angle of the protective handrail is inconvenient to adjust.

In order to achieve the purpose, the invention adopts the following technical scheme:

a protective rail, comprising:

the guardrail comprises at least two guardrail components, wherein two ends of one of the adjacent guardrail components are provided with fastening components, the fastening components are provided with first threaded holes, and the fastening components can selectively rotate relative to the guardrail components or be limited at preset positions of the guardrail components;

the two adjacent wherein both ends of another of railing subassembly are provided with the connecting piece, the connecting piece can for railing subassembly rotates, the connecting piece with the one end that fastening component is relative is provided with the screw thread, the connecting piece with fastening component threaded connection to two adjacent railing subassembly is connected.

Alternatively, the fastening assembly comprises:

the threaded cylinder is rotatably arranged on the railing assembly and is provided with the first threaded hole;

the end cover is covered on the outer side of the threaded cylinder and is connected with the fastening assembly in a clamped mode through the railing assembly, a polygonal clamping groove is formed in the bottom of the threaded cylinder, a clamping block is correspondingly arranged on the inner side of the end cover, and the clamping block can be clamped into the clamping groove to limit the threaded cylinder to rotate.

As an alternative, the balustrade assembly comprises:

the upper cross rod and the lower cross rod are arranged in parallel at intervals, and the fastening assemblies or the connecting pieces are arranged at the two ends of the upper cross rod and the lower cross rod;

the vertical rod assembly comprises a plurality of vertical rods arranged at intervals, and two ends of each vertical rod are respectively connected with the upper cross rod and the lower cross rod.

As an alternative, the vertical rod assembly further comprises:

a plurality of down tube, it is a plurality of the down tube interval sets up in adjacent two between the montant.

As an alternative scheme, the inclined rods are of V-shaped structures, and the V-shaped inclined rods are uniformly arranged on the two adjacent vertical rods at intervals.

As an alternative, the balustrade assembly further comprises:

and the lifting rod is arranged on the upper side of the upper cross rod and can move up and down relative to the upper cross rod.

As an alternative, the lifting bar comprises:

the lifting cross rod is arranged on the upper side of the upper cross rod;

two lift montants, connect in the both ends of lift horizontal pole, the lift montant slides and wears to establish go up the horizontal pole, and be located the both sides of montant subassembly.

As an alternative, the outside of lift montant is provided with the casing, the both ends of casing respectively with go up the horizontal pole with the sheer pole links to each other, the internal diameter of casing is greater than the external diameter of lift montant, the upper end of casing is provided with the second screw hole that link up, it is provided with a plurality of third screw holes to correspond along the extending direction of lift montant on the lift montant, and the screw can pass in proper order the second screw hole with the third screw hole is with it is right the lift montant carries on spacingly.

As an alternative scheme, the lift montant is hollow structure, the bottom of lift montant is provided with the through-hole, the inboard bottom of casing is provided with the gag lever post, the upper end of gag lever post is provided with the boss, the upper end of gag lever post stretches into inside the lift montant, just the diameter of gag lever post is less than the diameter of through-hole, the diameter of boss is greater than the diameter of through-hole.

As an alternative scheme, an elastic piece is sleeved on the limiting rod and located between the boss and the lifting vertical rod.

As an alternative scheme, a plurality of through holes are formed in the lifting cross rod at intervals, a limiting groove is formed in the upper cross rod and is opposite to the through holes, the lifting rod further comprises a plurality of movable vertical rods, and the movable vertical rods penetrate through the through holes and are clamped into the limiting groove.

As an alternative, the railing assembly further comprises two rollers, and the two rollers are respectively arranged at the bottoms of the two ends of the lower cross rod.

The invention has the beneficial effects that:

according to the protective railing provided by the invention, the connecting piece is in threaded connection with the fastening component to connect and fix the two railing components, and the fastening component can rotate relative to the railing components, so that after the connecting piece and the fastening component connect and fix the two railing components, the railing components connected with the fastening component are rotated to adjust the erection angle between the two adjacent railing components, the connecting piece does not need to be unscrewed, and the operation is quicker. After the angle adjustment is good, the fastening component can be limited at the preset position of the railing component and does not rotate any more, so that the erection angle between two adjacent railing components is kept, and random change is avoided. And connecting piece and fastening components all connect on railing subassembly, can effectively prevent to lose.

Drawings

FIG. 1 is a schematic view of the structure of a guard rail provided by the present invention;

FIG. 2 is a schematic view of the connection of a connector and fastener assembly provided by the present invention;

FIG. 3 is a schematic structural view of a threaded cartridge provided by the present invention;

figure 4 is a schematic view of the construction of the balustrade assembly provided by the present invention;

fig. 5 is an enlarged view at a in fig. 4.

In the figure:

1. a balustrade assembly; 11. an upper cross bar; 111. accommodating grooves; 12. a lower cross bar; 13. a vertical bar assembly; 131. a vertical rod; 132. a diagonal rod; 14. a lifting rod; 141. a lifting cross bar; 142. lifting the vertical rod; 1421. a third threaded hole; 143. a movable vertical rod; 15. a housing; 16. a limiting rod; 161. a boss; 162. an elastic member;

2. a fastening assembly; 21. a threaded barrel; 211. a card slot; 212. a first protrusion; 213. a second protrusion; 22. an end cap; 221. a clamping block;

3. a connecting member; 31. a connecting rod; 32. a handle; 33. a threaded rod;

4. and (4) a roller.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", "left", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.

The first embodiment is as follows:

as shown in fig. 1, the present embodiment provides a guard rail, which is erected on a power engineering construction or maintenance site to prevent a constructor from entering. The protective barrier comprises at least two barrier components 1, fastening components 2 are arranged at two ends of one of the two adjacent barrier components 1, first threaded holes are formed in the fastening components 2, and the fastening components 2 can selectively rotate relative to the barrier components 1 or are limited at preset positions of the barrier components 1. Two ends of one of them another of two adjacent railing subassemblies 1 are provided with connecting piece 3, and connecting piece 3 can rotate for railing subassembly 1, and the one end that the fastening assembly 2 is relative of connecting piece 3 is provided with the screw thread, and connecting piece 3 and fastening assembly 2 threaded connection to connect two adjacent railing subassemblies 1.

The protection railing of this embodiment, it is fixed to be connected two railing subassemblies 1 through connecting piece 3 and fastening components 2 threaded connection, because fastening components 2 can rotate for railing subassemblies 1, can be after connecting piece 3 and fastening components 2 connect two railing subassemblies 1 fixedly, rotate railing subassemblies 1 that link to each other with fastening components 2 and adjust the angle of erectting between two adjacent railing subassemblies 1, need not to unscrew the cooperation between connecting piece 3 and the fastening components 2, the operation is comparatively swift. After angular adjustment is good, fastening component 2 can be spacing no longer rotates in railing component 1's preset position to keep setting up the angle between two adjacent railing components 1, no longer change at will. And connecting piece 3 and fastening components 2 all connect on railing subassembly 1, can effectively prevent to lose.

Specifically, as shown in fig. 1 and fig. 2, the fastening assembly 2 includes a threaded cylinder 21 and an end cover 22, the threaded cylinder 21 is rotatably disposed on the rail assembly 1, a first threaded hole is disposed on the threaded cylinder 21, the end cover 22 covers the outer side of the threaded cylinder 21 and is connected to the rail assembly 1 provided with the fastening assembly 2 in a clamping manner, as shown in fig. 3, a polygonal clamping groove 211 is disposed at the bottom of the threaded cylinder 21, a clamping block 221 is correspondingly disposed on the inner side of the end cover 22, and the clamping block 221 can be clamped into the clamping groove 211 to limit rotation of the threaded cylinder 21. In this embodiment, the slot 211 is a quadrilateral structure, the fixture 221 is a cuboid, the outer diameter of the fixture 221 is slightly smaller than the inner diameter of the slot 211, and the end cap 22 is rotated to align the fixture 221 with the slot 211, so that the fixture 221 can be easily inserted into the slot 211.

Preferably, with reference to fig. 2, the rail assembly 1 is provided with a receiving groove 111, the receiving groove 111 opens upwards, a through hole is formed at the bottom of the receiving groove 111, and the threaded cylinder 21 is rotatably disposed in the through hole. The outside of a screw thread section of thick bamboo 21 is provided with first arch 212 and second arch 213 along circumference, and the external diameter of first arch 212 and second arch 213 all is greater than the diameter of the through-hole on the tank bottom of holding tank 111, and first arch 212 and second arch 213 are located the both sides of the tank bottom of holding tank 111 respectively to carry on spacingly to a screw thread section of thick bamboo 21, prevent that a screw thread section of thick bamboo 21 from breaking away from with railing subassembly 1.

Specifically, as shown in fig. 2, the connecting member 3 includes a connecting rod 31, a handle 32, and a threaded rod 33, the handle 32 being disposed at an upper end of the connecting rod 31, and the threaded rod 33 being disposed at a lower end of the connecting rod 31. Be provided with the through-hole on the railing subassembly 1, the internal diameter of through-hole is greater than the diameter of connecting rod 31 and is less than the diameter of handle 32 and threaded rod 33, and the through-hole is worn to establish by connecting rod 31, and handle 32 and threaded rod 33 are located the both ends of through-hole respectively to carry on spacingly to connecting rod 31, prevent that connecting rod 31 from deviating from in the through-hole.

Further, referring to fig. 1, railing subassembly 1 includes horizontal pole 11, sheer pole 12 and montant subassembly 13, and horizontal pole 11 parallels and the interval setting with sheer pole 12, and the both ends of horizontal pole 11 and sheer pole 12 all are provided with fastening component 2 or connecting piece 3, set up two connecting pieces 3 between the adjacent railing subassembly 1 and connect, and it is more firm to connect. The vertical rod assembly 13 includes a plurality of vertical rods 131 arranged at intervals, and both ends of the vertical rods 131 are connected to the upper cross rod 11 and the lower cross rod 12 respectively. The plurality of vertical bars 131 are closely disposed between the upper and

lower rails

11 and 12, thereby preventing non-workers from entering between the upper and

lower rails

11 and 12. Preferably, a plurality of vertical rods 131 are arranged at uniform intervals, so that the blocking effect is better and the appearance is more attractive. In this embodiment, five vertical rods 131 are provided, and in practical cases, the number of the vertical rods 131 can be specifically set according to the width requirement and the installation environment of the balustrade assembly 1, and is not limited herein.

Preferably, as shown in fig. 1, the vertical rod assembly 13 further includes a plurality of inclined rods 132, and the plurality of inclined rods 132 are disposed between two adjacent vertical rods 131 at intervals, so as to reduce the gap between the vertical rods 131. The inclined rods 132 are arranged in a V-shaped structure, the V-shaped inclined rods 132 are evenly arranged on the two adjacent vertical rods 131 at intervals, and the two adjacent V-shaped inclined rods 132 are divided into two areas, so that the space for non-construction personnel to pass through is further reduced. In this embodiment, seven inclined rods 132 are disposed between two adjacent vertical rods 131, and in practical cases, the number of the inclined rods 132 can be specifically set according to the height of the balustrade assembly 1 and the installation environment, which is not limited herein.

Further, as shown in fig. 1, the balustrade assembly 1 further includes a lifting rod 14, and the lifting rod 14 is disposed on the upper side of the upper cross bar 11 and can move up and down relative to the upper cross bar 11, so as to adjust the height of the balustrade assembly 1.

Specifically, as shown in fig. 1, the lifting rod 14 includes a lifting cross rod 141 and two lifting vertical rods 142, the lifting cross rod 141 is disposed on the upper side of the upper cross rod 11 and is parallel to the upper cross rod 11, the two lifting vertical rods 142 are respectively vertically connected to two ends of the lifting cross rod 141, and the lifting vertical rods 142 slidably penetrate through the upper cross rod 11 and are located on two sides of the vertical rod assembly 13. The vertical lifting rods 142 slide along the upper cross rod 11 to drive the lifting cross rod 141 to move up and down, so that the lifting rods 14 are lifted up and down.

Preferably, as shown in fig. 1 and 4, a casing 15 is disposed outside the vertical lifting rod 142, two ends of the casing 15 are respectively connected to the upper cross rod 11 and the lower cross rod 12, an inner diameter of the casing 15 is greater than an outer diameter of the vertical lifting rod 142, a through second threaded hole is disposed at an upper end of the casing 15, a plurality of third threaded holes 1421 are correspondingly disposed on the vertical lifting rod 142 along an extending direction of the vertical lifting rod 142, and a screw can sequentially pass through the second threaded hole on the casing 15 and the third threaded hole 1421 on the vertical lifting rod 142 to limit the vertical lifting rod 142.

Further, as shown in fig. 4 and 5, the vertical lifting rod 142 is a hollow structure, a through hole is formed in the lower end of the vertical lifting rod 142, the limiting rod 16 is arranged at the bottom of the inner side of the casing 15, a boss 161 is arranged at the upper end of the limiting rod 16, the upper end of the limiting rod 16 extends into the vertical lifting rod 142, the diameter of the limiting rod 16 is smaller than that of the through hole, and the diameter of the boss 161 is larger than that of the through hole, so that the vertical lifting rod 142 is prevented from being disengaged from the limiting rod 16 in the upward movement process.

Preferably, as shown in fig. 5, the stop lever 16 is sleeved with an elastic member 162, and the elastic member 162 is located between the boss 161 and the vertical lifting rod 142. During the upward movement of the vertical lifting rod 142, the elastic member 162 provides a buffering function. The elastic member 162 is preferably a spring.

Further, referring to fig. 1, a plurality of through holes are formed in the lifting cross rod 141 at intervals, a limit groove is formed in the upper cross rod 11 opposite to the through holes, the lifting rod 14 further comprises a plurality of movable vertical rods 143, the movable vertical rods 143 penetrate through the through holes and are clamped into the limit groove, and non-constructors are prevented from penetrating through a gap between the lifting cross rod 141 and the upper cross rod 11 by arranging the movable vertical rods 143. In this embodiment, four movable vertical rods 143 are provided, but not limited thereto, and in practical cases, the number of the movable vertical rods 143 may be specifically set according to the distance between the two lifting vertical rods 142.

Further, railing unit 1 still includes two gyro wheels 4, and two gyro wheels 4 set up respectively in the bottom at the both ends of sheer pole 12 to conveniently remove railing unit 1. The preferred universal wheel that rotates of gyro wheel 4 is more nimble, more conveniently removes railing subassembly 1.

The assembly process of the protection railing that this embodiment provided:

firstly, pushing two adjacent railing assemblies 1 to enable an upper cross rod 11 provided with a connecting piece 3 to be positioned on the upper side of the upper cross rod 11 provided with a fastening assembly 2 and a lower cross rod 12 provided with the connecting piece 3 to be positioned on the upper side of the lower cross rod 12 provided with the fastening assembly 2;

then, the threaded rod 33 is inserted into the first threaded hole of the threaded barrel 21, the threaded barrel 21 is fixed by using a tool such as a wrench, the handle 32 is screwed, and the threaded rod 33 is gradually screwed into the first threaded hole of the threaded barrel 21 until the upper cross bar 11 or the lower cross bar 12 of the two railing assemblies 1 are clamped tightly;

then, the railing assemblies 1 provided with the fastening assemblies 2 are rotated, and the angle between the two railing assemblies 1 is adjusted;

after the angle adjustment is completed, aligning the fixture block 221 on the end cover 22 with the fixture groove 211 on the threaded cylinder 21, and clamping the end cover 22 into the upper cross bar 11 or the lower cross bar 12;

then, the lifting cross rod 141 is pulled up or pressed down, and the lifting vertical rod 142 is limited through a screw;

finally, the movable vertical rod 143 is inserted into the through hole of the lifting cross rod 141, and is inserted into the limit groove of the upper cross rod 11 for limiting, so that the installation between the two railing components 1 is completed.

If more railing assemblies 1 are needed in a construction site, other railing assemblies 1 can be connected according to the steps.

The second embodiment:

the guard rail provided by the embodiment is basically the same as the first embodiment, and the difference is that: set up the internal thread on the through-hole inner wall of the junction of entablature 11 or sheer pole 12 and connecting piece 3, connecting rod 31 corresponds and is provided with the external screw thread, and connecting rod 31 and entablature 11 or sheer pole 12 threaded connection to it is more stable to make the connection between the adjacent railing subassembly 1.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations, and substitutions will occur to those skilled in the art without departing from the scope of the present invention. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A guard rail, comprising:

the guardrail comprises at least two guardrail components (1), wherein two ends of one of the adjacent guardrail components (1) are provided with fastening components (2), the fastening components (2) are provided with first threaded holes, and the fastening components (2) can selectively rotate relative to the guardrail components (1) or be limited at preset positions of the guardrail components (1);

two ends of the other one of the two adjacent railing assemblies (1) are provided with connecting pieces (3), the connecting pieces (3) can rotate relative to the railing assemblies (1), one end of each connecting piece (3) opposite to the fastening assembly (2) is provided with a thread, and the connecting pieces (3) are in threaded connection with the fastening assemblies (2) so as to connect the two adjacent railing assemblies (1);

the fastening assembly (2) comprises:

the threaded cylinder (21), the threaded cylinder (21) is rotatably arranged on the railing assembly (1), and the threaded cylinder (21) is provided with the first threaded hole;

end cover (22), end cover (22) cover is located screw thread section of thick bamboo (21) outside and with set up fastening components (2) railing subassembly (1) joint links to each other, the bottom of screw thread section of thick bamboo (21) is provided with polygonal draw-in groove (211), the inboard correspondence of end cover (22) is provided with fixture block (221), fixture block (221) can block into in draw-in groove (211), in order to restrict screw thread section of thick bamboo (21) rotate.

2. A guard rail according to claim 1, characterized in that the rail assembly (1) comprises:

the device comprises an upper cross bar (11) and a lower cross bar (12), wherein the upper cross bar (11) and the lower cross bar (12) are arranged in parallel at intervals, and the fastening assemblies (2) or the connecting pieces (3) are arranged at the two ends of the upper cross bar (11) and the lower cross bar (12);

the vertical rod component (13) comprises a plurality of vertical rods (131) arranged at intervals, and two ends of each vertical rod (131) are respectively connected to the upper cross rod (11) and the lower cross rod (12).

3. Protective rail according to claim 2, characterized in that the vertical bar assembly (13) further comprises:

a plurality of down tube (132), a plurality of down tube (132) interval sets up in adjacent two between montant (131).

4. A guard rail according to claim 3, characterized in that the diagonal members (132) are V-shaped structures, and the V-shaped diagonal members (132) are evenly spaced from two adjacent vertical members (131).

5. Guard rail according to claim 2, characterized in that the rail assembly (1) further comprises:

and a lifting rod (14) which is arranged on the upper side of the upper cross rod (11) and can move up and down relative to the upper cross rod (11).

6. A guard rail according to claim 5, characterised in that the lifting bar (14) comprises:

a lifting cross bar (141) arranged on the upper side of the upper cross bar (11);

two lifting vertical rods (142) are connected to two ends of the lifting cross rod (141), and the lifting vertical rods (142) penetrate through the upper cross rod (11) in a sliding mode and are located on two sides of the vertical rod assembly (13).

7. The protective rail of claim 6, characterized in that a housing (15) is arranged on the outer side of the vertical lifting rod (142), two ends of the housing (15) are respectively connected with the upper cross rod (11) and the lower cross rod (12), the inner diameter of the housing (15) is larger than the outer diameter of the vertical lifting rod (142), a through second threaded hole is formed in the upper end of the housing (15), a plurality of third threaded holes (1421) are correspondingly formed in the vertical lifting rod (142) along the extending direction of the vertical lifting rod (142), and screws can sequentially pass through the second threaded holes and the third threaded holes (1421) to limit the vertical lifting rod (142).

8. The protective rail according to claim 7, characterized in that the vertical lifting rod (142) is a hollow structure, a through hole is formed in the bottom of the vertical lifting rod (142), a limiting rod (16) is arranged at the bottom of the inner side of the housing (15), a boss (161) is arranged at the upper end of the limiting rod (16), the upper end of the limiting rod (16) extends into the vertical lifting rod (142), the diameter of the limiting rod (16) is smaller than that of the through hole, and the diameter of the boss (161) is larger than that of the through hole.

9. Guard rail according to claim 8, characterized in that the stop bar (16) is sleeved with an elastic element (162), and the elastic element (162) is located between the boss (161) and the vertical lifting bar (142).

10. The guard rail according to claim 6, characterized in that a plurality of through holes are arranged on the lifting cross bar (141) at intervals, a limit groove is arranged on the upper cross bar (11) opposite to the through holes, the lifting rod (14) further comprises a plurality of movable vertical rods (143), and the plurality of movable vertical rods (143) pass through the through holes and are clamped into the limit groove.

11. Guard rail according to any of the claims 2-10, characterized in that the rail assembly (1) further comprises two rollers (4), the two rollers (4) being arranged at the bottom of the two ends of the bottom rail (12), respectively.