CN207314692U - A kind of precast stair - Google Patents
A kind of precast stair Download PDFInfo
- Publication number
- CN207314692U CN207314692U CN201721378882.0U CN201721378882U CN207314692U CN 207314692 U CN207314692 U CN 207314692U CN 201721378882 U CN201721378882 U CN 201721378882U CN 207314692 U CN207314692 U CN 207314692U
- Authority
- CN
- China
- Prior art keywords
- steel plate
- slide
- stepladders
- tread
- metalwork
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Steps, Ramps, And Handrails (AREA)
Abstract
A kind of precast stair is the utility model is related to, belongs to building element technical field, the stair include matrix and are juxtaposed on the stepladders and slide of matrix；Matrix include integrally formed cant beam, on take horizontalization platform and under take horizontalization platform；Cant beam surface programming has metalwork, stepladders is formed by multigroup step to docking successively, every group of step the tread steel plate and riser steel plate of one to being made of, the upper surface of the tread steel plate outer end in metalwork upper surface and adjacent step pair is respectively welded in the outer end lower surface of the tread steel plate of every group of step pair and the bottom of riser steel plate, and tread surface of steel plate is provided with anti-skidding raised line and fluorescence leather strap；Slide includes slide board and the slide stent set below, slide stent are welded on metalwork.The stepladders of the utility model uses steel construction, eliminates surface dabbing process, alleviates dead weight；Slide can not only alleviate traffic, also add recreational；Anti-skidding raised line can avoid pedestrian from skidding；Fluorescence leather strap can avoid pedestrian from making a misstep at night.
Description
Technical field
It the utility model is related to building element technical field, and in particular to a kind of precast stair.
Background technology
Stair are one of very important structural elements in building structure, and the construction of stair usually carries out at the scene, scene
Stair construction needs the tedious process undergone, more to manpower and materials demand, live seriously polluted, long construction period；Produce
Concrete staircase from great, cost is also higher.
At present, existing precast stair is first prefabricated in the factory concrete structure structure using standardization, batch production mode now
Part, then by the component conveying to being installed at the scene.This prefabricated mode does not save the surfaces such as dabbing, tiling
The cumbersome process of processing, and simply these processes are shifted, and the product produced adds prefabricated from great
Difficulty and insecurity of the stair in transport, lifting and installation etc..
With the concentration of urban population, often there is the crowded scene of pedestrian in the stairs port in building；The joy of existing stair
Happy function is also fewer, and many children are liked along stair handle glide downwards, so extremely dangerous.Existing stair are because of step
The frictional force on surface is inadequate, and pedestrian walks on stair easily skids and fall down.When stair are walked under conditions of rather dark, Hang Renyi
Imprudence is easy for the injury that slips, thus stair night using when need lighting device.
Utility model content
The purpose of this utility model is to provide a kind of precast stair, to solve existing concrete structure pedal surface chisel
The tedious process and precast stair is congested in traffic from great, stairs port and amusement function is few, surface is easily skidded, night traffic is easy such as hair
The problems such as injury that slips.
To achieve the above object, the technical solution of the utility model is to provide a kind of precast stair, the precast stair bag
Include：Matrix (1), stepladders (2) and slide (3), the stepladders (2) and the slide (3) are disposed in parallel on matrix (1)；
Be embedded with bar-mat reinforcement inside described matrix (1), described matrix (1) include cant beam (4), on take horizontalization platform (51) and under take horizontalization
Platform (52), the upper and lower side of the cant beam (4) respectively with above take horizontalization platform (51) and under take horizontalization platform (52) and be connected to form one；Institute
State cant beam (4) surface parallel interval and be preset with a plurality of metalwork (41) for being fixed on bar-mat reinforcement, the stepladders (2) is by multigroup
Rank forms to docking successively, every group of step to by one tread steel plate (21) and riser steel plate (22) be mutually connected vertically and
Into；The outer end lower surface of the tread steel plate (21) of the step pair is welded in metalwork (41) upper surface, and the step is to kicking
The bottom of face steel plate (22) is welded in the outer end upper surface of the tread steel plate (21) of adjacent step pair；Tread steel plate (21) table
Face is provided with anti-skidding raised line (6) and phosphor strip (7)；The slide (3) includes slide board (31) and slide stent (32), the cunning
Gangboard (31) is arranged on slide stent (32), and the slide stent (32) is welded on metalwork (41).
Further, the horizontally-parallel interval of a plurality of metalwork (41) or parallel longitudinal it is disposed on cant beam (4) table
On face.
As a preferred embodiment, a plurality of metalwork (41) is horizontally-parallel is disposed on cant beam (4) surface.
As a preferred embodiment, the metalwork (41) is steel plate or elongated reinforcing bar.
Further, the diameter of the elongated reinforcing bar is greater than or equal to 20mm, and two ends of the elongated reinforcing bar are through two
Hollow crotch is formed after secondary 90 degree of bendings.
As a preferred embodiment, the anti-skidding raised line (6) is arranged at tread steel plate (21) surface middle part, described anti-skidding convex
The cross section of bar (6) is triangle or semicircle.
As a preferred embodiment, the phosphor strip (7) is arranged at the tread steel plate (21) of step pair and adjacent step pair
Riser steel plate (22) weld, the equal length of phosphor strip (7) length and tread steel plate (21).
As a preferred embodiment, the exposed end face of the stepladders (2) is welded with triangular steel plate (20), the triangle
The shape of shape steel plate (20) is identical with the cross section of stepladders (2).
Further, taken on described horizontalization platform (51) bottom and it is described under take the bottom of horizontalization platform (52) and be both provided with peace
Fill hole.
Further, it is fixed with threaded nut in the mounting hole hole.
Further, taken on described horizontalization platform (51) and under take horizontalization platform (52) be overlapped in respectively put groove (53) and
Under take and put on groove (54), it is described on take put groove (53) and it is described under take and put groove (54) and offer through hole (55).
Preferably, the through hole (55) is more than the mounting hole with mounting hole for the aperture of concentric structure and through hole (55)
Aperture.
Further, stepladders (2) both sides of the edge are arranged at intervals with guardrail (8).
Further, cant beam (4) edge is arranged at intervals with guardrail mounting hole (81), on the tread steel plate (21)
Guardrail installation corresponding aperture (82) is opened up, fence upright is fixed with the guardrail mounting hole (81) and guardrail installation corresponding aperture (82)
(83), fence upright (83) top is provided with guardrail handrail (84), and guardrail horizontal stroke is provided among the fence upright (83)
Support (85), rail (86) is provided between the guardrail stull (85).
The utility model method has the following advantages that：
(1) the stepladders step of stair is made of steel plate, reduces the formwork of concrete structure stair, simplifies and pour
Build, maintenance processes, eliminate the cumbersome process of the surface treatments such as dabbing, tiling, improve production efficiency；Alleviate at the same time pre-
The dead weight of stair processed so that the transport of stair, lifting become more convenient and safe.
(2) slide is added in stepladders side, and slide can not only be used for the express passway gone downstairs during pedestrian's emergency escape, can alleviate
The traffic of stairs port walk is nervous；The instrument played but also as children, adds the recreational of stair；Also avoid children
The hazardous act of sliding balustrade, reduces security risk when children play.
(3) anti-skidding raised line adds the frictional force of stepladders surface of steel plate, can avoid pedestrian in stepladders steel plate surface uplink
Walk to skid and fall down.
(4) fluorescence leather strap makes the position that stairway step is clear that under the power failure of pedestrian's night corridor or dim condition
Put, avoid making a misstep the generation for the accident of falling down；And power consumption, energy conservation and environmental protection is not required in the luminous of the stair fluorescence leather strap.
Brief description of the drawings
Fig. 1 is the structure diagram of precast stair.
Fig. 2 is the structure diagram of the matrix of precast stair.
Fig. 3 is the sectional schematic diagram of stepladders.
Fig. 4 is the structure diagram of stepladders.
Fig. 5 is the sectional schematic diagram of slide on matrix.
Fig. 6 is the lateral plan of guardrail on matrix.
Embodiment
The following examples illustrate the utility model, but is not intended to limit the scope of the present invention.
Embodiment 1
The structure of the utility model is described in detail with reference to figure.
With reference to figure 1, a kind of precast stair disclosed in the present embodiment, the precast stair includes：Matrix 1, stepladders 2 and cunning
Ladder 3, the stepladders 2 and the slide 3 are disposed in parallel on matrix 1；The stepladders 2 by multigroup step to docking successively and
Into every group of step the tread steel plate 21 and riser steel plate 22 of one to being made of；21 surface of tread steel plate is provided with anti-skidding
Raised line 6 and phosphor strip 7；The slide 3 includes slide board 31 and slide stent 32, and the slide board 31 is arranged at slide stent 32
On, the slide stent 32 is welded on metalwork 41.
With reference to 2 figures, be embedded with bar-mat reinforcement inside described matrix 1, including cant beam 4, on take horizontalization platform 51 and under take horizontalization platform
52, the top and bottom of the cant beam 4 respectively with above take horizontalization platform 51 and under take horizontalization platform 52 and be connected to form one, above take horizontalization
Platform 51 and under take horizontalization platform 52 be placed on respectively in floor on take put groove 53 and under take and put groove 54；4 surface of cant beam
Parallel interval is preset with a plurality of metalwork 41 for being fixed on bar-mat reinforcement.
Further, the horizontally-parallel interval of a plurality of metalwork 41 or parallel longitudinal it is disposed on 4 surface of cant beam.
As a preferred embodiment, a plurality of metalwork 41 is horizontally-parallel is disposed on 4 surface of cant beam.
As a preferred embodiment, the metalwork 41 is steel plate or elongated reinforcing bar.
Further, the diameter of the elongated reinforcing bar is greater than or equal to 20mm, and two ends of the elongated reinforcing bar are through two
Hollow crotch is formed after secondary 90 degree of bendings.
Further, above take horizontalization platform 51 bottom and under take the bottom of horizontalization platform 52 and be both provided with mounting hole.
Further, it is fixed with threaded nut in the mounting hole hole.
Further, above take horizontalization platform 51 and under take horizontalization platform 52 be overlapped in respectively put groove 53 and under take and put groove
54, above take put groove 53 and under take and put groove 54 and offer through hole 55.
Further, above take the bottom surface of putting groove 53 and under take and put the bottom surface of groove 54 and be embedded with steel plate, the steel plate
Internal pre-buried bar-mat reinforcement is fixed on, the steel plate opens up mounting hole.
As a preferred embodiment, mounting hole, through hole 55 and mounting hole for concentric structure and mounting hole, through hole 55 and are installed
The aperture in hole is sequentially reduced from top to bottom.
Precast stair in traditional construction is put groove and is connected using grouting way with taking, and this grouting connection mode exists not
Firmly, the insecurity such as easy cracking.Taken in the present embodiment and put mesa base setting mounting hole, correspondingly, needing constructing
Live floor reserved when pouring take put groove 53 and under take and put groove 54, and put taking to put groove and be correspondingly arranged to take for installation
The through hole of platform, puts on groove in order to be bolted to be fixed on to take during stair assembled in situ, and then carries out traditional
Gap grouting treatment.The setting of threaded hole inner nut, steel plate and mounting hole are added, and can all make the installation of precast stair more square
Just and fast, while it ensure that the intensity for installing staircase structure entirety.
With reference to figure 3, the stepladders 2 is the prefabricated workpiece of steel plate, and the stepladders 2 is by multigroup step to docking successively
Form, every group of step is to being mutually connected vertically and being formed by the tread steel plate 21 and riser steel plate 22 of one.
The outer end lower surface of the tread steel plate 21 of the step pair is welded in 41 upper surface of metalwork, and the step is to kicking
The bottom of face steel plate 22 is welded in the outer end upper surface of the tread steel plate 21 of adjacent step pair.Stepladders 2 is exactly to pass through step pair
Tread steel plate 21, it is such between riser steel plate 22 and metalwork 41 be fixedly welded on cant beam 4, the welding of stepladders 2 is
Carry out from the bottom up, the connection relation between each step is as follows：
First step, under take 52 surface programming of horizontalization platform and have steel plate 100,22 bottom of riser steel plate of step pair is first welded
The steel plate 100 that lower floor takes 52 surface programming of horizontalization platform is connected to, forms the First between riser steel plate 22 and pre-embedded steel slab 100
The first weld seam of rank 101；Meanwhile the outer end lower surface edge of the tread steel plate 21 of step pair is welded to connect in 41 center line of metalwork,
Form the second weld seam of first step 102.
Second step, the bottom of the riser steel plate 22 of step pair be welded to connect in first step tread steel plate 21 it is outer
Upper surface is held, forms the first weld seam of second step 201；Meanwhile the bottom lower surface edge welding of the tread steel plate 21 of step pair
41 center line of metalwork is connected to, forms the second weld seam of second step 202.
3rd step, the 4th step ... are until n-th of step, the bottom welding company of the riser steel plate 22 of step pair
It is connected to the 21 outer end upper surface of tread steel plate of (n-1)th step, the outer end lower surface edge welding of the tread steel plate 21 of step pair
In 41 center line of metalwork,
The 8th step shown in last step, i.e. figure, the bottom of the riser steel plate 22 of step pair be welded to connect in
The outer end upper surface of 7th step tread steel plate 21, forms the 8th the first weld seam of step 801；Outside the tread steel plate 21 of step pair
End lower surface edge is welded to connect in 41 center line of metalwork, forms the 8th the second weld seam of step 802.
In order to further illustrate the effect of precast stair weight reduction, in the present embodiment, design story height is h=
3.2m, and installed by the way of two pieces of matrixes of floor gap staggeredly overlap, design stairway width is 1m, the riser of stepladders step
Steel plate height b=200mm, the tread steel plate width of stepladders step are 300mm, steel plate thickness 3mm, and concrete density takes mc
=2400kg/m3, steel plate density takes mg=7850kg/m3。
By data above, can calculate the present embodiment precast stair weight reduction amount △ m=[0.2 × 0.3 × 1 × 0.5 ×
2400- (0.3 × 1 × 0.003+0.2 × 1 × 0.003) × 7850] × 16=963.6kg.
It can be seen from the above that this precast stair alleviates dead weight, matrix can be made in the convenience of transport, lifting, installation etc.
It is further enhanced with security.
With reference to figure 4, the stepladders 2 is formed by multigroup step to docking successively, and every group of step is to the tread steel by one
Plate 21 and riser steel plate 22 form.21 surface of tread steel plate is provided with anti-skidding raised line 6 and phosphor strip 7, the anti-skidding raised line 6
21 surface middle part of tread steel plate is arranged at, the phosphor strip 7 is arranged at the weld of tread steel plate 21 and riser steel plate 22, described
The exposed end face of stepladders (2) is welded with triangular steel plate 20.
Further, the cross section of the anti-skidding raised line 6 is triangle or semicircle.Set on stepladders steel plate surface anti-
Sliding raised line, adds the frictional force of stepladders surface of steel plate, and pedestrian can be avoided to walk on stepladders steel plate surface and skid and fall down.
Further, 7 length of phosphor strip and the equal length of tread steel plate 21.Fluorescence skin is set on step tread
Bar, under the power failure of night corridor or dim condition, pedestrian is clear that the position of stairway step, avoids making a misstep the accident of falling down
Generation；And power consumption, energy conservation and environmental protection is not required in the luminous of the stair fluorescence leather strap.
Further, the shape of the triangular steel plate 20 is identical with the cross section of the stepladders 2.Stepladders termination passes through
After closure, mark time steel plate and the riser steel plate of the harmful substances such as moisture, air intrusion stepladders can be prevented, and then slow down steel plate rust
Erosion.
Refering to what is shown in Fig. 5, the slide 3 includes slide board 31 and slide stent 32, the slide board 31 is arranged at slide
On stent 32, the slide stent 32 is welded on metalwork 41.
Slide is added in stepladders side, and slide can not only be used for the express passway gone downstairs during pedestrian's emergency escape, can alleviate building
The traffic of ladder way walk is nervous；The instrument played but also as children, adds the recreational of stair；Also children are avoided to slide
The hazardous act of balustrade, reduces security risk when children play.
With reference to figure 6,4 edge of cant beam is arranged at intervals with guardrail mounting hole 81, and guardrail is opened up on the tread steel plate 21
Corresponding aperture 82 is installed, is fixed with fence upright 83 on guardrail mounting hole 81 and guardrail the installation corresponding aperture 82, the guardrail is stood
83 top of column is provided with guardrail handrail 84, is provided with guardrail stull 85 among the fence upright 83, the guardrail stull 85 it
Between be provided with rail 86.
Preferably, it is advance respectively before the fence upright 83, guardrail handrail 84, guardrail stull 85, rail 86 are installed
It is integrally formed, each component can be prefabricated in the factory production, reduce the finishing stand-by period, while reduce manpower expense expenditure, material resources expense
With expenditure so that the duration shortens, and further reduces the cost, installation settles at one go.
Further, can using self threading pin between fence upright 83, guardrail handrail 84, guardrail stull 85, rail 86
Releasably it is fixedly connected, the effect being completely embedded can be reached and personalized re-assembly is carried out according to user demand.
In conclusion matrix is precast member for reinforcing bar concrete, the step of stepladders is formed to for the prefabricated workpiece of steel plate,
Precast member for reinforcing bar concrete and the prefabricated workpiece of steel plate first are completed to produce in factory, and each component of guardrail can be prefabricated in the factory production
It is integrally formed in advance before installation, takes and put groove and its through hole and reserved when floor pours at the construction field (site), construction site only needs
The assemblings such as matrix, stepladders, slide and guardrail can be constructed and complete stair.
Although above having made detailed description to the utility model with generality explanation and specific embodiment,
On the basis of the utility model, it can be made some modifications or improvements, this is apparent to those skilled in the art
's.Therefore, the these modifications or improvements on the basis of without departing from the utility model spirit, belonging to the utility model will
Seek the scope of protection.
Claims (9)
1. a kind of precast stair, it is characterised in that the precast stair includes：Matrix (1), stepladders (2) and slide (3), institute
State stepladders (2) and the slide (3) is disposed in parallel on matrix (1)；Bar-mat reinforcement is embedded with inside described matrix (1), it is described
Matrix (1) include cant beam (4), on take horizontalization platform (51) and under take horizontalization platform (52), the top and bottom of the cant beam (4) are distinguished
With above take horizontalization platform (51) and under take horizontalization platform (52) and be connected to form one, it is described on take horizontalization platform (51) and under take horizontalization platform
(52) be placed on respectively in floor on take put groove (53) and under take and put groove (54)；Cant beam (4) surface parallel interval
The a plurality of metalwork (41) for being fixed on bar-mat reinforcement is preset with, the stepladders (2) is formed by multigroup step to docking successively, every group
Step is to being mutually connected vertically and being formed by the tread steel plate (21) and riser steel plate (22) of one；The tread steel plate of the step pair
(21) outer end lower surface is welded in metalwork (41) upper surface, and the bottom of the riser steel plate (22) of the step pair is welded in phase
The outer end upper surface of the tread steel plate (21) of adjacent step pair；Tread steel plate (21) surface is provided with anti-skidding raised line (6) and glimmering
Striation (7)；The slide (3) includes slide board (31) and slide stent (32), and the slide board (31) is arranged at slide stent
(32) on, the slide stent (32) is welded on metalwork (41).
2. precast stair as claimed in claim 1, it is characterised in that a plurality of horizontally-parallel interval or vertical of metalwork (41)
It is arranged on to parallel interval on cant beam (4) surface.
3. precast stair as claimed in claim 2, it is characterised in that the metalwork (41) is steel plate or elongated reinforcing bar.
4. precast stair as claimed in claim 3, it is characterised in that the diameter of the elongated reinforcing bar is greater than or equal to 20mm,
Two ends of the elongated reinforcing bar form hollow crotch after 90 degree twice bendings.
5. precast stair as claimed in claim 1, it is characterised in that the anti-skidding raised line (6) is arranged at tread steel plate (21)
Surface middle part, the cross section of the anti-skidding raised line (6) is triangle or semicircle.
6. precast stair as claimed in claim 1, it is characterised in that the phosphor strip (7) is arranged at the tread steel of step pair
The weld of plate (21) and the riser steel plate (22) of adjacent step pair, phosphor strip (7) length and the length of tread steel plate (21)
Spend equal.
7. precast stair as claimed in claim 1, it is characterised in that the exposed end face of the stepladders (2) is welded with triangle
Shape steel plate (20), the shape of the triangular steel plate (20) are identical with the cross section of stepladders (2).
8. precast stair as claimed in claim 1, it is characterised in that taken on described horizontalization platform (51) bottom and it is described under take
The bottom of horizontalization platform (52) is both provided with mounting hole.
9. precast stair as claimed in claim 1, it is characterised in that stepladders (2) both sides of the edge are arranged at intervals with shield
Column (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721378882.0U CN207314692U (en) | 2017-10-24 | 2017-10-24 | A kind of precast stair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721378882.0U CN207314692U (en) | 2017-10-24 | 2017-10-24 | A kind of precast stair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207314692U true CN207314692U (en) | 2018-05-04 |
Family
ID=62379012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721378882.0U Expired - Fee Related CN207314692U (en) | 2017-10-24 | 2017-10-24 | A kind of precast stair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207314692U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110258986A (en) * | 2019-07-09 | 2019-09-20 | 四川福美来新型建筑材料有限公司 | A kind of staircase structure of integrated house |
| CN112746713A (en) * | 2020-12-30 | 2021-05-04 | 江苏沪宁钢机股份有限公司 | Triangular step stair and construction process thereof |
-
2017
- 2017-10-24 CN CN201721378882.0U patent/CN207314692U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110258986A (en) * | 2019-07-09 | 2019-09-20 | 四川福美来新型建筑材料有限公司 | A kind of staircase structure of integrated house |
| CN112746713A (en) * | 2020-12-30 | 2021-05-04 | 江苏沪宁钢机股份有限公司 | Triangular step stair and construction process thereof |
| WO2022142766A1 (en) * | 2020-12-30 | 2022-07-07 | 江苏沪宁钢机股份有限公司 | Triangular stepping stair and construction process therefor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1028556C (en) | Building construction system | |
| CN207314692U (en) | A kind of precast stair | |
| US20080236065A1 (en) | Modular concrete stair truss system | |
| CN201952738U (en) | Catwalk suitable for self-anchored double-cable-plane suspension bridge | |
| CN207609153U (en) | A kind of elevator liftable construction operation platform | |
| JP2008223341A (en) | Mobile installation type pedestrian overpass | |
| CN209723438U (en) | A kind of novel coagulation body precast stair plate | |
| CN109505309B (en) | Pipe gallery segment displacement system and pipe gallery installation method using same | |
| CN210316280U (en) | Assembled construction safety protection stair | |
| CN202559618U (en) | Multi-step connection type cage staircase | |
| RU54984U1 (en) | MODULAR SLIDING PANDUS | |
| CN205976546U (en) | A rail transport device for sloping scope of operation | |
| CN210976057U (en) | Novel assembled vestibule of elevator is installed additional to energy-efficient outer wall | |
| CN211639872U (en) | Multi-specification PC component placing frame | |
| CN104948206B (en) | Slip form trolley for concrete casting of arched inclined shaft | |
| CN208122299U (en) | A kind of concrete of crossing soars aloft beam from climbing monoblock type tub system | |
| CN211498488U (en) | Highway and railway dual-purpose bridge movable railway hard protection platform | |
| CN210238316U (en) | Bridge inverted U-shaped hanging basket device | |
| CN217151400U (en) | Movable type staggered platform stair for basement construction site | |
| CN216142461U (en) | Prefabricated staircase passageway integral lifting protection support body | |
| CN206128636U (en) | Detachable stair formwork of flier | |
| CN109987465A (en) | A kind of lift of mechanical movement | |
| CN216949181U (en) | Convenient installation and disassembly double-race stair | |
| CN105041019B (en) | A kind of three-dimensional single-row car garage in roadside | |
| CN214996342U (en) | Integrated protection channel for stairwell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180504 Termination date: 20181024 |