CN113585063B - Glass guardrail mounting equipment with lateral screw locking mechanism - Google Patents
Glass guardrail mounting equipment with lateral screw locking mechanism Download PDFInfo
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- CN113585063B CN113585063B CN202110892534.XA CN202110892534A CN113585063B CN 113585063 B CN113585063 B CN 113585063B CN 202110892534 A CN202110892534 A CN 202110892534A CN 113585063 B CN113585063 B CN 113585063B
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- Prior art keywords
- lateral
- assembly
- groove
- adjusting
- longitudinal
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
- E01D19/103—Parapets, railings ; Guard barriers or road-bridges
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/18—Balustrades; Handrails
- E04F11/181—Balustrades
- E04F11/1817—Connections therefor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/18—Balustrades; Handrails
- E04F11/181—Balustrades
- E04F11/1842—Balusters; Grille-type elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/18—Balustrades; Handrails
- E04F11/181—Balustrades
- E04F11/1817—Connections therefor
- E04F2011/1831—Connections therefor between balustrade filling members, e.g. panels, and balustrade posts
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/18—Balustrades; Handrails
- E04F2011/1868—Miscellaneous features of handrails not otherwise provided for
- E04F2011/187—Miscellaneous features of handrails not otherwise provided for lengthwise adjustable, e.g. telescopic
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
The invention relates to the technical field of guardrail mounting equipment, in particular to glass guardrail mounting equipment with a lateral screw locking mechanism, which comprises a longitudinal upright post, a bottom mounting plate welded at the lower end of the longitudinal upright post and lateral stainless steel cables connected to two sides of the longitudinal upright post. According to the glass guardrail mounting device with the lateral screw locking mechanism, the lifting limiting block for mounting the lateral assembly blocks is arranged in the longitudinal upright post, the longitudinal adjusting rod for controlling the lifting limiting block is arranged in the central position in the longitudinal upright post, the mounting and dismounting modes are various, and the mounting and dismounting operation is simple and convenient; the longitudinal adjusting rod is inserted into the internal thread meshing transmission groove through the external thread adjusting ring to be meshed and transmitted with the lifting limiting block, so that the lifting is convenient to adjust, and the adjusted structure is firm and stable; the top adjusting head is fixed and limited through the top assembling frame, so that the structural stability and safety after assembling and adjusting are greatly improved; the tightness and stability of the lateral stainless steel cable connecting end are greatly improved.
Description
Technical Field
The invention relates to the technical field of guardrail mounting equipment, in particular to glass guardrail mounting equipment with a lateral screw locking mechanism.
Background
The stainless steel guardrail structure is generally divided into a main rod and a stand column, wherein the main rod is also often called a main pipe, and the stand column can be called a stand pipe and is used for supporting the main pipe.
The stainless steel guard rail has many advantages and is very widely popularized. The stainless steel guardrails frequently seen in life are provided with stair guardrails, and the balcony guardrails are made of stainless steel and are more than one; most bridge guardrails are also cement or marble, and stainless steel bridge guardrails are also relatively few.
In the installation production process of the traditional stainless steel guardrail, a bottom upright post is required to be used, the upright post for the traditional guardrail is simple in structure and cannot be adjusted in structure, in order to improve the installation firmness of the guardrail, a fastening mechanism is required to be installed on two sides of the guardrail, the loading and unloading mode of the fastening mechanism is fixedly limited, the installation position is limited, and the later disassembly and maintenance are inconvenient.
Disclosure of Invention
The invention aims to solve the technical problems that: in order to solve the problems in the prior art, the improved glass guardrail mounting device with the lateral screw locking mechanism is provided, and the problems that the structure of a traditional upright post for a guardrail is simple, the structure cannot be adjusted, the mounting and dismounting modes of fastening mechanisms on two sides of the guardrail are fixed and limited, the mounting position is limited, and the later disassembly and maintenance are inconvenient are solved.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a glass guardrail erection equipment with side direction screw rod locking mechanism, includes vertical stand, welds the bottom mounting panel in vertical stand lower extreme and connects the side direction stainless steel wire cable in vertical stand both sides, vertical stand both sides outer wall on seted up a plurality of side direction assembly recess, vertical stand be located the inside internal regulation cavity that has seted up built-in lift stopper of side direction assembly recess, vertical stand inside central point put the middle part regulation cavity of having seted up built-in vertical regulation pole, side direction stainless steel wire cable both ends fixedly connected with and side direction assembly recess matched with side direction assembly piece, side direction stainless steel wire cable insert internal regulation cavity and be connected with vertical stand from side direction assembly recess through side direction assembly piece.
The lateral assembly groove, the internal adjusting chamber and the middle adjusting chamber are communicated.
The lifting limiting block is close to the longitudinal adjusting rod end and provided with an internal thread meshing transmission groove, an integrated external thread adjusting ring meshed with the internal thread meshing transmission groove is fixedly sleeved on the arc surface on the outer side of the longitudinal adjusting rod, and the longitudinal adjusting rod is inserted into the internal thread meshing transmission groove through the external thread adjusting ring to be in meshing transmission with the lifting limiting block.
The central position of the upper end of the longitudinal upright post is provided with a top adjusting sinking groove communicated with the middle adjusting cavity, the top end of the longitudinal adjusting rod is coaxially fixed with a top adjusting head, and the central position of the top end of the top adjusting head is provided with an inner hexagonal adjusting groove.
And the upper ends of the longitudinal upright posts are positioned at two sides of the top adjusting sinking groove, and inner thread assembly blind holes are formed in the upper ends of the longitudinal upright posts.
The inner bottom surface of the lateral assembly groove is provided with an arc-shaped bottom transition groove communicated with the internal adjusting cavity, and the outer side surface of the lifting limiting block, which is close to the lateral assembly groove, is provided with an arc-shaped lateral transition groove matched with the arc-shaped bottom transition groove.
The lifting limiting block is provided with a lateral storage groove with a built-in elastic overturning extrusion frame on the outer side surface close to the lateral assembly groove.
The top of the vertical upright post is provided with a top assembly frame for assembling a top handrail, the lower end of the top assembly frame is provided with a lateral strip-shaped opening corresponding to the position of the internal thread assembly blind hole, a lateral locking bolt is inserted into the lateral strip-shaped opening, the center of the lower end of the top assembly frame is provided with an integrally structured outer hexagonal limiting block protruding downwards, and the top assembly frame is screwed into the internal thread assembly blind hole through the lateral locking bolt and is fixedly connected with the top of the vertical upright post.
The bottom limiting sinking groove is formed in the center of the lower end of the longitudinal upright post, and the bottom limiting head is coaxially fixed at the bottom end of the longitudinal adjusting rod.
The lateral assembly blind hole is symmetrically formed in the upper end of the inner side surface of the lateral storage groove, and the elastic overturning extrusion frame comprises an outer control plate, an elastic bending reset plate and an elastic bending extrusion plate, wherein the outer control plate is movably connected with the lateral storage groove in a lateral storage mode through the lateral assembly rotating shaft, the elastic bending reset plate is fixed at the upper end of the inner side of the outer control plate, and the elastic bending extrusion plate is fixed at the lower end of the inner side of the outer control plate.
The beneficial effects of the invention are as follows:
(1) According to the glass guardrail mounting device with the lateral screw locking mechanism, the lifting limiting block for mounting the lateral assembly blocks is arranged in the longitudinal upright post, and the longitudinal adjusting rod for controlling the lifting limiting block is arranged in the central position in the longitudinal upright post, so that the mounting and dismounting modes between the longitudinal upright post and the lateral stainless steel cable are various, and the mounting and dismounting operation is simple and convenient;
(2) The longitudinal adjusting rod is inserted into the internal thread meshing transmission groove through the external thread adjusting ring to be meshed and transmitted with the lifting limiting block, so that the lifting is convenient to adjust, and the adjusted structure is firm and stable;
(3) The top adjusting head of the overhead inner hexagonal adjusting groove is coaxially fixed at the top end of the longitudinal adjusting rod, an inner thread assembly blind hole is formed at the upper end of the longitudinal upright post, the top adjusting head is fixed and limited through a top assembly frame, and the structural stability and the safety after assembly and adjustment are greatly improved;
(4) The lateral storage groove with the built-in elastic overturning extrusion frame is formed in the outer side face of the lifting limiting block, the lateral stainless steel cable inside the lateral assembly groove is extruded and fixed through the elastic overturning extrusion frame, and the tightness and stability of the lateral stainless steel cable connecting end are greatly improved.
Drawings
The invention will be further described with reference to the drawings and examples.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an internal cross-sectional view of the present invention.
FIG. 3 is a partial cross-sectional view of the position of the lifting stop block in the present invention.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
The glass guardrail mounting device with the lateral screw locking mechanism comprises a longitudinal upright 1, a bottom mounting plate 2 welded at the lower end of the longitudinal upright 1 and lateral stainless steel wires 3 connected to two sides of the longitudinal upright 1, wherein the bottom mounting plate 2 is fixed on the ground through internal fixing bolts, 6 lateral assembly grooves 4 are formed in the outer walls of two sides of the longitudinal upright 1, an internal adjusting cavity 6 with a built-in lifting limiting block 5 is formed in the lateral assembly grooves 4 of the longitudinal upright 1, a middle adjusting cavity 8 with a built-in longitudinal adjusting rod 7 is formed in the central position of the interior of the longitudinal upright 1, lateral assembly blocks 9 matched with the lateral assembly grooves 4 are fixedly connected to two ends of the lateral stainless steel wires 3, and the lateral stainless steel wires 3 are inserted into the internal adjusting cavity 6 from the lateral assembly grooves 4 through the lateral assembly blocks 9 and are connected with the longitudinal upright 1.
Further, to accommodate the internal control, the lateral fitting recess 4, the internal regulating chamber 6 and the central regulating chamber 8 are in internal communication.
Further, in order to match with the threaded engagement adjustment, an internal threaded engagement transmission groove 10 is formed at the end, close to the longitudinal adjustment rod 7, of the lifting limiting block 5, an integral structure external threaded adjustment ring 11 engaged with the internal threaded engagement transmission groove 10 is fixedly sleeved on the arc surface at the outer side of the longitudinal adjustment rod 7, and the longitudinal adjustment rod 7 is inserted into the internal threaded engagement transmission groove 10 through the external threaded adjustment ring 11 to be engaged with the lifting limiting block 5 for transmission.
Further, in order to cooperate with top adjustment and top limit, a top adjustment sinking groove 12 communicated with the middle adjustment cavity 8 is formed in the central position of the upper end of the longitudinal upright post 1, a top adjustment head 13 is coaxially fixed to the top end of the longitudinal adjustment rod 7, and an inner hexagonal adjustment groove 14 is formed in the central position of the top end of the top adjustment head 13.
Further, in order to be matched with the lateral bolt for fixation, the upper ends of the longitudinal upright posts 1 are positioned at two sides of the top adjusting sinking groove 12, and inner thread assembly blind holes are formed.
Further, in order to improve the safety of the assembly end of the lateral stainless steel cable 3, the guide is convenient, an arc-shaped bottom transition groove 15 communicated with the internal adjusting cavity 6 is formed in the inner bottom surface of the lateral assembly groove 4, and an arc-shaped lateral transition groove 16 matched with the arc-shaped bottom transition groove 15 is formed in the outer side surface, close to the lateral assembly groove 4, of the lifting limiting block 5.
Further, in order to improve the lateral extrusion limiting capacity, a lateral storage groove 17 with a built-in elastic overturning extrusion frame is formed on the outer side surface, close to the lateral assembly groove 4, of the lifting limiting block 5.
Further, in order to cooperate top assembly and top spacing, the top of vertical stand 1 is provided with the top assembly frame 18 that is used for assembling the top handrail, and the side direction bar opening 19 has been seted up to top assembly frame 18 lower extreme corresponding internal thread assembly blind hole position, and the inside grafting of side direction bar opening 19 has side direction locking bolt 20, and top assembly frame 18 lower extreme central point puts and has the outer hexagonal stopper 21 of downward bellied integral structure, and top assembly frame 18 passes through side direction locking bolt 20 screw in internal thread assembly blind hole inside and vertical stand 1 top fixed connection.
Further, in order to match with the bottom limit, a bottom limit sinking groove 22 is arranged at the center of the lower end of the longitudinal upright post 1, and a bottom limit head 23 is coaxially fixed at the bottom end of the longitudinal adjusting rod 7.
Further, in order to match with the elastic assembly and the elastic extrusion, the upper end of the inner side surface of the lateral accommodating groove 17 is symmetrically provided with lateral assembly blind holes, and the elastic overturning extrusion frame comprises an outer control plate 24 which is inserted into the lateral assembly blind holes through a lateral assembly rotating shaft and movably connected with the lateral accommodating groove 17, an elastic bending reset plate 25 fixed at the upper end of the inner side of the outer control plate 24 and an elastic bending extrusion plate 26 fixed at the lower end of the inner side of the outer control plate 24.
Loading and unloading principle: people insert the lateral assembly block 9 into the lateral assembly groove 4, finally enter the inner adjusting cavity 6, then insert into the inner hexagonal adjusting groove 14 through a hexagonal wrench to drive the top adjusting head 13 to rotate, the outer threaded adjusting ring 11 drives the lifting limiting block 5 to descend, the bottom of the lifting limiting block 5 extrudes the lateral assembly block 9, meanwhile, the outer control plate 24 is turned outwards, the bottom of the elastic bending reset plate 25 extrudes the upper end of the lateral stainless steel cable 3, an arc extrusion groove is formed in the bottom of the elastic bending reset plate 25, a turning groove is formed in the bottom of the outer control plate 24, the lateral assembly block 9 is conveniently turned outwards, and finally the bottom of the inner adjusting cavity 6 is fixed, so that fixation is completed; the disassembly mode can be completed only by reverse rotation. Finally, the top assembly frame 18 is fixed at the upper end of the longitudinal upright post 1, and the angle of the longitudinal adjusting rod 7 is fixed, and meanwhile, the top hand guard can be conveniently installed.
According to the glass guardrail mounting equipment with the lateral screw locking mechanism, the lifting limiting block 5 for mounting the lateral assembly blocks 9 is arranged in the longitudinal upright post 1, and the longitudinal adjusting rod 7 for controlling the lifting limiting block 5 is arranged in the central position in the longitudinal upright post 1, so that the mounting and dismounting modes between the longitudinal upright post 1 and the lateral stainless steel cable 3 are various, and the mounting and dismounting operation is simple and convenient; the longitudinal adjusting rod 7 is inserted into the internal thread meshing transmission groove 10 through the external thread adjusting ring 11 to be meshed and transmitted with the lifting limiting block 5, so that the lifting is convenient to adjust, and the structure after adjustment is firm and stable; the top of the longitudinal adjusting rod 7 is coaxially fixed with a top adjusting head 13 of a top-mounted inner hexagonal adjusting groove 14, an inner thread assembly blind hole is formed at the upper end of the longitudinal upright post 1, the top adjusting head 13 is fixed and limited through a top assembly frame 18, and the structural stability and the safety after assembly and adjustment are greatly improved; the lateral storage groove 17 with the built-in elastic overturning extrusion frame is formed in the outer side face of the lifting limiting block 5, the lateral stainless steel wire 3 in the lateral assembly groove 17 is extruded and fixed through the elastic overturning extrusion frame, and the tightness and stability of the connecting end of the lateral stainless steel wire 3 are greatly improved.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (5)
1. Glass guardrail installing device with side direction screw rod locking mechanism, including vertical stand (1), welding bottom mounting panel (2) at vertical stand (1) lower extreme and connect side direction stainless steel cable (3) in vertical stand (1) both sides, characterized by: the two sides of the vertical column (1) are provided with a plurality of lateral assembly grooves (4), the vertical column (1) is positioned in the lateral assembly grooves (4) and is internally provided with an internal adjusting cavity (6) with a built-in lifting limiting block (5), the central position of the interior of the vertical column (1) is provided with a middle adjusting cavity (8) with a built-in longitudinal adjusting rod (7), two ends of the lateral stainless steel wire (3) are fixedly connected with lateral assembly blocks (9) matched with the lateral assembly grooves (4), the lateral stainless steel wire (3) is inserted into the internal adjusting cavity (6) from the lateral assembly grooves (4) through the lateral assembly blocks (9) to be connected with the vertical column (1), the lifting limiting block (5) is close to the end of the longitudinal adjusting rod (7) and is provided with an internal thread meshing transmission groove (10), the outer arc surface of the outer side of the longitudinal adjusting rod (7) is fixedly sleeved with an external thread adjusting ring (11) with an integral structure meshed with the internal thread meshing transmission groove (10), the longitudinal adjusting rod (7) is inserted into the internal adjusting cavity (5) through the external thread adjusting ring (11) to be meshed with the middle adjusting cavity (8) at the top of the vertical column (1), the utility model provides a vertical adjusting rod (7) top coaxial fixed with top adjustment head (13), top adjustment head (13) top central point put and to have seted up interior hexagonal adjustment groove (14), vertical stand (1) top be provided with top assembly frame (18) that are used for assembling the top handrail, top assembly frame (18) lower extreme correspond the internal thread assembly blind hole position and have seted up side direction bar opening (19), side direction bar opening (19) inside peg graft have side direction locking bolt (20), top assembly frame (18) lower extreme central point put and have bellied outer hexagonal stopper (21) of an organic whole structure down, top assembly frame (18) screw in internal thread assembly blind hole inside and vertical stand (1) top fixed connection through side direction locking bolt (20), lifting stopper (5) be close to side direction assembly groove (4) lateral direction and accomodate recess (17) of built-in elasticity upset extrusion frame on the lateral direction extrusion frame, side direction accomodate recess (17) medial surface upper end symmetry and seted up side direction assembly, elasticity upset extrusion frame include and insert side direction extrusion frame and connect in side direction (24) outside control panel (24) outside through side direction blind hole through side direction locking bolt (20) screw in, an elastic bending reset plate (25) fixed at the upper end of the inner side of an external control plate (24) and an elastic bending extrusion plate (26) fixed at the lower end of the inner side of the external control plate (24), wherein a person inserts a lateral assembly block (9) into a lateral assembly groove (4), finally enters an internal adjusting cavity (6), then inserts a hexagonal wrench into an internal hexagonal adjusting groove (14) to drive a top adjusting head (13) to rotate, an external thread adjusting ring (11) drives a lifting limiting block (5) to descend, the bottom of the lifting limiting block (5) extrudes the lateral assembly block (9), meanwhile, the external control plate (24) is outwards turned over, the bottom of the elastic bending reset plate (25) is extruded at the upper end of a lateral stainless steel cable (3), an arc extrusion groove is formed at the bottom of the elastic bending reset plate (25), a turnover groove is formed at the bottom of the external control plate (24), and the lateral assembly block (9) is conveniently outwards stirred, and finally the bottom of the internal adjusting cavity (6) is fixed to finish fixing; the disassembly mode can be completed only by reverse rotation, and finally the top assembly frame (18) is fixed at the upper end of the longitudinal upright post (1), so that the angle of the longitudinal adjusting rod (7) is fixed, and meanwhile, the hand guard at the top can be conveniently installed.
2. A glass guardrail mounting apparatus with a lateral screw locking mechanism as defined in claim 1, wherein: the lateral assembly groove (4), the inner adjusting chamber (6) and the middle adjusting chamber (8) are communicated.
3. A glass guardrail mounting apparatus with a lateral screw locking mechanism as defined in claim 1, wherein: the upper end of the longitudinal upright post (1) is positioned at two sides of the top adjusting sinking groove, and internal thread assembly blind holes are formed.
4. A glass guardrail mounting apparatus with a lateral screw locking mechanism as defined in claim 1, wherein: the inner bottom surface of the lateral assembly groove (4) is provided with an arc-shaped bottom transition groove (15) communicated with the internal adjusting cavity (6), and the outer side surface of the lifting limiting block (5) close to the lateral assembly groove (4) is provided with an arc-shaped lateral transition groove (16) matched with the arc-shaped bottom transition groove (15).
5. A glass guardrail mounting apparatus with a lateral screw locking mechanism as defined in claim 1, wherein: the bottom limiting sinking groove (22) is formed in the center of the lower end of the longitudinal upright post (1), and the bottom limiting head (23) is coaxially fixed at the bottom end of the longitudinal adjusting rod (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110892534.XA CN113585063B (en) | 2021-08-04 | 2021-08-04 | Glass guardrail mounting equipment with lateral screw locking mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110892534.XA CN113585063B (en) | 2021-08-04 | 2021-08-04 | Glass guardrail mounting equipment with lateral screw locking mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113585063A CN113585063A (en) | 2021-11-02 |
| CN113585063B true CN113585063B (en) | 2023-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110892534.XA Active CN113585063B (en) | 2021-08-04 | 2021-08-04 | Glass guardrail mounting equipment with lateral screw locking mechanism |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207974621U (en) * | 2018-03-06 | 2018-10-16 | 桂建华 | Novel municipal administration gardens cable guardrail |
| CN208294213U (en) * | 2018-03-26 | 2018-12-28 | 青岛林辉钢构有限公司 | A kind of steel pipe pole with stringing fixed structure |
| KR101899934B1 (en) * | 2018-05-10 | 2018-09-19 | (주)이명이앤씨건축사사무소 | Fence for veranda of apartment house with emergency exit |
| CN208815451U (en) * | 2018-08-20 | 2019-05-03 | 重庆峰途交通设施有限公司 | A kind of halving road guard bar |
| CN209976163U (en) * | 2019-04-25 | 2020-01-21 | 宜兴市轩兴辕金属科技有限公司 | Building construction protective fence with steel rope structure |
| CN210216253U (en) * | 2019-06-22 | 2020-03-31 | 东莞市永庆市政服务有限公司 | Municipal garden steel cable guardrail |
| CN210529488U (en) * | 2019-06-24 | 2020-05-15 | 中国路桥工程有限责任公司 | Bridge guardrail |
| CN211113174U (en) * | 2019-09-03 | 2020-07-28 | 彭中原 | Bridge railing's installation coupling mechanism |
| CN213063008U (en) * | 2020-06-12 | 2021-04-27 | 项征 | Building site faces limit safety barrier |
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