CN113235961B - Protection plate for elevator shaft structure in building engineering and construction method thereof - Google Patents
Protection plate for elevator shaft structure in building engineering and construction method thereof Download PDFInfo
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- CN113235961B CN113235961B CN202110581375.1A CN202110581375A CN113235961B CN 113235961 B CN113235961 B CN 113235961B CN 202110581375 A CN202110581375 A CN 202110581375A CN 113235961 B CN113235961 B CN 113235961B
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- elevator shaft
- protective plate
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/32—Safety or protective measures for persons during the construction of buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/32—Safety or protective measures for persons during the construction of buildings
- E04G21/3204—Safety or protective measures for persons during the construction of buildings against falling down
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/32—Safety or protective measures for persons during the construction of buildings
- E04G21/3204—Safety or protective measures for persons during the construction of buildings against falling down
- E04G21/3209—Temporary tunnels specially adapted against falling objects
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Abstract
The invention discloses a protective plate for a structure of an elevator shaft in building engineering, which comprises an elevator shaft, an elevator shaft opening, a protective plate and a connecting assembly, wherein the elevator shaft opening is provided with a plurality of connecting holes; according to the protective device for the elevator shaft construction, the protective plate is subjected to main body manufacturing through the arranged protective plate main body frame and the arranged reinforcing steel bars, then pouring forming work is performed on the protective plate according to construction requirements, the protective device is simple to manufacture and low in cost, the protective plate can be quickly built and fixed in the elevator shaft through the construction method of the protective plate of the elevator shaft structure in the building engineering, operation is convenient, a complex building process is not needed, convenience is brought to workers, construction efficiency is improved, good stability is achieved, construction safety is improved, later-stage dismantling is more convenient, working hours are reduced, and construction progress is accelerated.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a protection plate for an elevator shaft structure in building engineering and a construction method thereof.
Background
Among the present building engineering construction, elevator shaft horizontal protection adopts "1 + 1" mode usually, adopt the one deck hard protection promptly, the soft protection of one deck, and every layer sets up reinforcing bar net piece, every layer is hung and is established the safety net, the I-steel of encorbelmenting every 5 layers sets up the interior scaffold frame of well, elevator door installation protection piece simultaneously, the elevator shaft protection is carried out to the mode more than adopting, construction speed is slow, the input material is many, and the construction potential safety hazard is bigger, and it is more troublesome to demolish of later stage guard plate, need extravagant more manpower, increase man-hour, delay the engineering progress.
To this end, the invention provides a protective plate of an elevator shaft structure in constructional engineering and a construction method thereof, which are used for solving the problems.
Disclosure of Invention
The invention aims to provide a protective plate of an elevator shaft structure in constructional engineering and a construction method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a protection plate for a structure of an elevator shaft in building engineering comprises an elevator shaft, an elevator shaft opening, a protection plate and a connecting assembly;
one side equidistance of elevartor shaft is provided with the elevator well entrance to connect between the adjacent elevator well entrance and be provided with the guard plate, the guard plate equidistance sets up in the elevartor shaft, the guard plate passes through coupling assembling to be connected the setting in the elevartor shaft.
Preferably, the protection plate includes protection plate main part frame, reinforcing bar, equidistant alternately scarf joint is provided with the reinforcing bar in protection plate main part frame.
Preferably, the reinforcing steel bars are arranged in a crossed and embedded mode in the protective plate main body frame, the reinforcing steel bars arranged in a crossed mode are perpendicular to each other, a square notch is formed, the protective plate is formed by pouring cement concrete in the formed notch, and the poured concrete level of the protective plate is the same as the concrete strength of the floor plate.
Preferably, the connecting assembly comprises a movable plate, a locking clamping groove, a connecting clamping plate, an extrusion chute, a first reset spring, an L-shaped movable rod, a locking clamping block, an extrusion chute block, a second reset spring, a concave movable extrusion block, a locking screw and a connecting clamping groove, wherein the movable plate is symmetrically and movably arranged in a protective plate main frame, a convex block is integrally formed on one side of the movable plate, the connecting spring is integrally formed on the convex block, the other end of the connecting spring is arranged in the protective plate main frame, the locking clamping groove is symmetrically arranged on two sides of the movable plate, the connecting clamping plate is movably arranged at the side position of one end of the movable plate in the protective plate main frame, the extrusion chute is arranged on one side of the connecting clamping plate, the first reset spring is arranged at equal intervals in the integral forming of one end of the connecting clamping plate, and the other end of the first reset spring is arranged in the protective plate main frame at equal intervals in the integral forming, l type movable rod symmetry activity sets up in guard plate main part frame to carry out the symmetry about the fly leaf and set up, the one end integrated into one piece of L type movable rod is provided with the locking fixture block, and other end integrated into one piece is provided with the extrusion sloping block, and one side integrated into one piece symmetry of L type movable rod is provided with second reset spring, and second reset spring other end integrated into one piece symmetry sets up in guard plate main part frame, the avris position activity at the extrusion sloping block in guard plate main part frame is provided with concave type activity extrusion block, the avris position threaded connection of concave type activity extrusion block is provided with the locking screw, the connecting card groove equidistance sets up the inside wall at the elevartor shaft to connecting card groove and connecting card board plug-in connection.
Preferably, the connecting clamping grooves correspond to the connecting clamping plates in arrangement position and are arranged in the same number of groups, four groups are arranged, and the cross sections of the notches of the connecting clamping grooves are the same as the cross sections of the end parts of the connecting clamping plates, namely the cross sections of the notches are equal in length and width.
Preferably, the locking fixture blocks and the locking clamping grooves are arranged at corresponding positions and in the same number, and the cross section of the end parts of the locking fixture blocks is the same as that of the notches of the locking clamping grooves, namely the cross sections of the locking fixture blocks and the notches are equal in length and width.
Preferably, the end surfaces of the two ends of the concave movable extrusion block, which are close to one side of the extrusion inclined block, are arc surfaces.
A construction method of a protection plate of an elevator shaft structure in constructional engineering comprises the following steps:
s1: the method comprises the following steps of (template prefabrication), firstly, inserting reinforcing steel bars into a protective plate main body frame at equal intervals, forming a protective plate main body by the reinforcing steel bars and the protective plate main body frame, finally, placing the protective plate main body on a pouring workbench, and pouring the protective plate main body by using cement concrete, wherein the grade of the poured concrete of the structural protective plate is the same as the strength of the concrete of a floor slab, and forming the protective plate main body;
s2: the molded protection plate is fixedly built in the elevator shaft at equal intervals through the arranged connecting components;
s3: (protection is demolishd) according to the engineering construction progress, treat that the major structure construction finishes, before the safety elevator, break out every layer of elevartor shaft guard plate, simultaneously at elevator shaft entrance to a cave department install the protection piece additional can.
Compared with the prior art, the invention has the beneficial effects that:
according to the protective device for the elevator shaft construction, the protective plate is subjected to main body manufacturing through the arranged protective plate main body frame and the arranged steel bars, then pouring forming work is performed on the protective plate according to construction requirements, the protective device is simple to manufacture and low in cost, the protective plate can be quickly built and fixed in the elevator shaft through the arrangement of the protective device on the connecting assembly, operation is convenient, a complex building process is not needed, convenience is brought to workers, construction efficiency is improved, good stability is achieved, construction safety is improved, later-stage dismantling is more convenient, working hours are reduced, and construction progress is accelerated.
Drawings
FIG. 1 is a schematic view of the structural connection of the present invention;
FIG. 2 is a schematic view of the structural connection of the elevator shaft and the fender according to the invention;
FIG. 3 is a schematic view of the connection between the main frame of the protection plate and the steel bar structure;
FIG. 4 is a left side view of the inner structure of the main frame of the protection plate according to the present invention;
FIG. 5 is an enlarged partial view of the structural joint of FIG. 4 according to the present invention;
FIG. 6 is a right side view of the internal structural connection of the main frame of the fender panel of the present invention;
fig. 7 is a partially enlarged view of the structural connection of fig. 6 according to the present invention.
In the figure: elevator shaft 1, elevator shaft opening 2, protection plate 3, protection plate main part frame 31, reinforcing bar 32, coupling assembling 4, movable plate 401, locking draw-in groove 402, connect cardboard 403, extrusion chute 404, first reset spring 405, L type movable rod 406, locking fixture block 407, extrusion sloping block 408, second reset spring 409, concave type activity extrusion block 410, locking screw 411, connect the draw-in groove 412.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below. The embodiments of the present invention, and all other embodiments obtained by a person of ordinary skill in the art without any inventive work, belong to the scope of protection of the present invention.
Referring to fig. 1 to 7, the present invention provides a technical solution: a protection plate for an elevator shaft structure in building engineering comprises an elevator shaft 1, an elevator shaft opening 2, a protection plate 3 and a connecting assembly 4;
one side equidistance of elevartor shaft 1 is provided with elevartor shaft entrance to a cave 2, and connect between the adjacent elevartor shaft entrance to a cave 2 and be provided with guard plate 3, include guard plate main part frame 31 here to guard plate 3, reinforcing bar 32, equidistant cross scarf joint is provided with reinforcing bar 32 in guard plate main part frame 31, here alternately inlays the setting to reinforcing bar 32 in guard plate main part frame 31, and the reinforcing bar 32 mutually perpendicular of cross arrangement, form square notch, form guard plate 3 through pouring cement concrete in the notch of formation, and 3 concrete level of pouring of guard plate are the same with floor slab concrete intensity, 3 equidistance of guard plate sets up in elevartor shaft 1, 3 sets up in elevartor shaft 1 through coupling assembling 4 connection of guard plate.
The connecting assembly 4 herein comprises a movable plate 401, a locking slot 402, a connecting plate 403, an extrusion chute 404, a first return spring 405, an L-shaped movable rod 406, a locking block 407, an extrusion inclined block 408, a second return spring 409, a concave movable extrusion block 410, a locking screw 411 and a connecting slot 412, wherein the movable plate 401 is symmetrically and movably disposed in a protective plate main body frame 31, a protrusion is integrally formed on one side of the movable plate 401, the connecting spring is integrally formed on the protrusion, the other end of the connecting spring is disposed in the protective plate main body frame 31, the locking slots 402 are symmetrically disposed on two sides of the movable plate 401, the connecting plate 403 is movably disposed at an edge side position of one end of the movable plate 401 in the protective plate main body frame 31, the extrusion chute 404 is disposed on one side of the connecting plate 403, and the first return springs 405 are equidistantly disposed at one end of the connecting plate 403, the other end of the first return spring 405 is integrally formed and equidistantly arranged in the protection plate main body frame 31, the L-shaped movable rod 406 is symmetrically and movably arranged in the protection plate main body frame 31 and symmetrically arranged relative to the movable plate 401, one end of the L-shaped movable rod 406 is integrally formed and provided with a locking fixture block 407, the other end of the L-shaped movable rod 406 is integrally formed and provided with an extrusion inclined block 408, wherein the locking fixture block 407 corresponds to the locking fixture groove 402 in arrangement position and is arranged in the same number of groups, the cross section shape of the end part of the locking fixture block 407 is the same as that of the groove opening of the locking fixture groove 402, namely the cross sections of the locking fixture block 407 are equal in length and width, one side of the L-shaped movable rod 406 is integrally formed and provided with a second return spring 409, the other end of the second return spring 409 is integrally formed and is symmetrically arranged in the protection plate main body frame 31, and a concave movable extrusion block 410 is movably arranged at the side position of the extrusion inclined block 408 in the protection plate main body frame 31, here, the end faces of two ends of the concave movable extrusion block 410 close to one side of the extrusion inclined block 408 are set to be arc-shaped faces, the side position of the concave movable extrusion block 410 is provided with a locking screw 411 in a threaded connection mode, the connection clamping grooves 412 are equidistantly arranged on the inner side wall of the elevator shaft 1, the connection clamping grooves 412 are in plug-in connection with the connection clamping plates 403, the connection clamping grooves 412 are corresponding to the arrangement positions of the connection clamping plates 403 and are the same in the number of the arrangement groups, four groups are arranged, the cross sections of the notches of the connection clamping grooves 412 are the same as the cross section of the end portions of the connection clamping plates 403, namely, the cross sections of the notches are equal in length and equal in width.
During structural construction, reinforcing steel bars with the diameter of 8-10mm are arranged on the same layer of reinforcing steel bars, the distance is 150-200mm in a single-layer two-way mode, the diameter model and the distance of the reinforcing steel bars are selected according to the size of an elevator shaft, and reinforcing steel bar meshes are connected with the peripheral shear wall structure; the elevator shaft protection plate template support is connected with the template with the same layer structure; the thickness of the structural protection plate is 30-50mm, and the thickness is also taken according to the size of the elevator shaft area; the concrete casting grade of the structure protection plate is the same as the concrete strength of the floor plate; after the pouring is finished, the protection plate can be used for protection without supporting a frame body, paving a template and the like, and the elevator shaft opening does not need to be supported for protection; according to the engineering construction progress, treat that the major structure construction finishes, before the safety elevator, abolish every layer of elevartor shaft guard plate, simultaneously at elevator well entrance to a cave department install additional the guard plate can.
The actual operation process is as follows: firstly, inserting reinforcing steel bars 32 into a protective plate main body frame 31 at equal intervals, forming a protective plate main body by the reinforcing steel bars 32 and the protective plate main body frame 31, finally placing the protective plate main body on a pouring workbench, and pouring the protective plate main body by using cement concrete, wherein the grade of the poured concrete of the structural protective plate is the same as the strength of the concrete of a floor slab, and forming the protective plate main body; the molded protection plate 3 is fixedly erected in the elevator shaft 1 at equal intervals through the arranged connecting components 4, the operation process is specifically that the connecting clamping plate 403 arranged at the side edge of the protection plate main body frame 31 is aligned with the connecting clamping groove 412 on the inner side of the elevator shaft 1, the movable plate 401 is firstly pressed quickly, the other end of the movable plate 401 enters the extrusion chute 404 on one side of the connecting clamping plate 403, then the connecting clamping plate 403 is extruded, one end of the connecting clamping plate 403 is clamped into the connecting clamping groove 412, then the locking screw 411 is screwed, the locking screw 411 extrudes the concave movable extrusion block 410, the two ends of the concave movable extrusion block 410 simultaneously extrude the extrusion chute 408, then the L-shaped movable rod 406 is arranged to drive one end of the locking clamping block 407 to be clamped into the locking clamping groove 402 on the movable plate 401, and the position of the movable plate 401 is fixed, namely, the connecting clamping plate 403 is clamped and fixed in the connecting clamping groove 412, the installation and construction of the protection plate 3 can be quickly completed, the later disassembly is very simple, the locking screw 411 is unscrewed, the extrusion of the locking screw 411 on the concave movable extrusion block 410 is released, the extrusion of the concave movable extrusion block 410 on the extrusion inclined block 408 is released, the L-shaped movable rod 406 returns to the initial position under the action of the second reset spring 409, the locking fixture block 407 is separated from the locking clamping groove 402, the locking and fixing of the movable plate 401 can be released, meanwhile, the extrusion of the movable plate 401 on the connecting clamping plate 403 is released, the connecting clamping plate 403 returns to the initial position under the action of the first reset spring 405, namely, the connecting clamping plate is separated from the connecting clamping groove 412, the fixing of the protection plate 3 is released, the protection plate 3 can be quickly disassembled, according to the engineering construction progress, treat that the major structure construction finishes, before the safety lift, break out every layer of elevartor shaft guard plate, simultaneously at elevator well entrance to a cave department install the guard plate additional can.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a building engineering elevartor shaft structure guard plate which characterized in that: the elevator hoistway structure comprises an elevator hoistway (1), an elevator hoistway opening (2), a protection plate (3) and a connecting assembly (4);
the elevator shaft comprises an elevator shaft (1), wherein elevator shaft holes (2) are formed in one side of the elevator shaft (1) at equal intervals, protection plates (3) are connected between the adjacent elevator shaft holes (2), the protection plates (3) are arranged in the elevator shaft (1) at equal intervals, and the protection plates (3) are connected and arranged in the elevator shaft (1) through connecting components (4);
the connecting assembly (4) comprises a movable plate (401), locking clamping grooves (402), connecting clamping plates (403), an extrusion chute (404), a first reset spring (405), an L-shaped movable rod (406), a locking clamping block (407), an extrusion inclined block (408), a second reset spring (409), a concave movable extrusion block (410), a locking screw (411) and a connecting clamping groove (412), wherein the movable plate (401) is symmetrically and movably arranged in a protective plate main body frame (31), a convex block is integrally formed on one side of the movable plate (401), a connecting spring is integrally formed on the convex block, the other end of the connecting spring is arranged in the protective plate main body frame (31), the locking clamping grooves (402) are symmetrically arranged on two sides of the movable plate (401), and the connecting clamping plates (403) are movably arranged in the side position of one end of the movable plate (401) in the protective plate main body frame (31), one side of the connecting clamping plate (403) is provided with an extrusion chute (404), one end of the connecting clamping plate (403) is integrally formed and equidistantly provided with a first reset spring (405), the other end of the first reset spring (405) is integrally formed and equidistantly arranged in the protective plate main body frame (31), the L-shaped movable rod (406) is symmetrically and movably arranged in the protective plate main body frame (31) and symmetrically arranged relative to the movable plate (401), one end of the L-shaped movable rod (406) is integrally formed and provided with a locking clamping block (407), the other end of the L-shaped movable rod (406) is integrally formed and provided with an extrusion inclined block (408), one side of the L-shaped movable rod (406) is integrally formed and symmetrically provided with a second reset spring (409), the other end of the second reset spring (409) is integrally formed and symmetrically arranged in the protective plate main body frame (31), a concave movable extrusion block (410) is movably arranged at the side position of the extrusion inclined block (408) in the protective plate main body frame (31), the lateral side of the concave movable extrusion block (410) is provided with a locking screw (411) in a threaded connection mode, the connecting clamping grooves (412) are arranged on the inner side wall of the elevator shaft (1) at equal intervals, and the connecting clamping grooves (412) are connected with the connecting clamping plates (403) in an insertion mode.
2. A constructional engineering elevator shaft structure protection plate according to claim 1, characterized in that: protection plate (3) include protection plate main part frame (31), reinforcing bar (32), equidistant alternately scarf joint is provided with reinforcing bar (32) in protection plate main part frame (31).
3. A constructional engineering elevator shaft structure protective plate according to claim 2, characterized in that: the reinforcing steel bars (32) are arranged in the protective plate main body frame (31) in a crossed and embedded mode, the reinforcing steel bars (32) arranged in the crossed mode are perpendicular to each other, square notches are formed, the protective plate (3) is formed by pouring cement concrete in the formed notches, and the concrete pouring grade of the protective plate (3) is the same as the concrete strength of the floor slab.
4. A constructional engineering elevator shaft structure protection plate according to claim 1, characterized in that: the connecting clamping grooves (412) and the connecting clamping plates (403) are arranged in corresponding positions and are arranged in the same number, four groups are arranged, the cross section of the groove opening of each connecting clamping groove (412) is the same as that of the end part of each connecting clamping plate (403), namely the cross sections of the groove opening and the connecting clamping plates are equal in length and width.
5. A constructional engineering elevator shaft structure protection plate according to claim 1, characterized in that: the locking fixture blocks (407) are arranged at positions corresponding to the locking clamping grooves (402) and are arranged in the same number, and the cross sections of the end parts of the locking fixture blocks (407) are the same as the cross sections of the notches of the locking clamping grooves (402), namely the cross sections of the locking fixture blocks and the notches are equal in length and width.
6. A constructional engineering elevator shaft structure protection plate according to claim 1, characterized in that: the end surfaces of two ends of the concave movable extrusion block (410) close to one side of the extrusion inclined block (408) are arc surfaces.
7. A construction method of a protection plate of an elevator shaft structure of a building engineering according to any one of claims 1 to 6, characterized in that the construction method comprises the steps of:
s1: prefabricating a template, namely inserting reinforcing steel bars (32) into a protective plate main body frame (31) at equal intervals, forming a protective plate main body by the reinforcing steel bars (32) and the protective plate main body frame (31), finally placing the protective plate main body on a pouring workbench, and pouring the protective plate main body by using cement concrete, wherein the pouring concrete grade of the structural protective plate is the same as the concrete strength of a floor slab, and forming the protective plate main body;
s2: the method comprises the following steps of (1) constructing and installing, namely, fixing and constructing the formed protection plate (3) in the elevator shaft (1) at equal intervals through the arranged connecting components (4);
s3: the protection is demolishd, according to the engineering construction progress, treats that the major structure construction finishes, and before the safety elevator, abolish every layer of elevartor shaft guard plate, it can to install the protection piece additional in elevator shaft entrance to a cave simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110581375.1A CN113235961B (en) | 2021-05-27 | 2021-05-27 | Protection plate for elevator shaft structure in building engineering and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110581375.1A CN113235961B (en) | 2021-05-27 | 2021-05-27 | Protection plate for elevator shaft structure in building engineering and construction method thereof |
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| Publication Number | Publication Date |
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| CN113235961A CN113235961A (en) | 2021-08-10 |
| CN113235961B true CN113235961B (en) | 2022-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110581375.1A Active CN113235961B (en) | 2021-05-27 | 2021-05-27 | Protection plate for elevator shaft structure in building engineering and construction method thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114212639B (en) * | 2021-12-30 | 2024-02-13 | 三箭建设工程集团有限公司 | Protective plate for elevator shaft structure of building engineering and construction method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB277126A (en) * | 1926-06-16 | 1927-09-15 | Edward Connell Caley | Apparatus for producing walls of concrete or like materials and for rough casting walls of buildings |
| CN201495787U (en) * | 2009-09-25 | 2010-06-02 | 中冶京唐建设有限公司 | Connection type reinforcement guard railing for safety protection of elevator shaft and door window openings |
| CN202969971U (en) * | 2012-12-13 | 2013-06-05 | 中国建筑第五工程局有限公司 | Elevator shaft protection device |
| CN205296799U (en) * | 2015-12-18 | 2016-06-08 | 中建八局第二建设有限公司 | Construction of elevator well and protection platform |
| CN211850987U (en) * | 2019-12-10 | 2020-11-03 | 中国二十冶集团有限公司 | Safety protection cover for construction hole of elevator shaft and floor |
-
2021
- 2021-05-27 CN CN202110581375.1A patent/CN113235961B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB277126A (en) * | 1926-06-16 | 1927-09-15 | Edward Connell Caley | Apparatus for producing walls of concrete or like materials and for rough casting walls of buildings |
| CN201495787U (en) * | 2009-09-25 | 2010-06-02 | 中冶京唐建设有限公司 | Connection type reinforcement guard railing for safety protection of elevator shaft and door window openings |
| CN202969971U (en) * | 2012-12-13 | 2013-06-05 | 中国建筑第五工程局有限公司 | Elevator shaft protection device |
| CN205296799U (en) * | 2015-12-18 | 2016-06-08 | 中建八局第二建设有限公司 | Construction of elevator well and protection platform |
| CN211850987U (en) * | 2019-12-10 | 2020-11-03 | 中国二十冶集团有限公司 | Safety protection cover for construction hole of elevator shaft and floor |
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| CN113235961A (en) | 2021-08-10 |
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