CN109577668B - Elevator shaft anti-falling net structure and construction process thereof - Google Patents
Elevator shaft anti-falling net structure and construction process thereof Download PDFInfo
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- CN109577668B CN109577668B CN201910016070.9A CN201910016070A CN109577668B CN 109577668 B CN109577668 B CN 109577668B CN 201910016070 A CN201910016070 A CN 201910016070A CN 109577668 B CN109577668 B CN 109577668B
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- sleeve
- connecting bolt
- elevator shaft
- connecting ring
- falling net
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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
- E04G21/3261—Safety-nets; Safety mattresses; Arrangements on buildings for connecting safety-lines
- E04G21/3266—Safety nets
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Types And Forms Of Lifts (AREA)
Abstract
The invention relates to an elevator shaft anti-falling net structure and a construction process thereof. The elevator shaft anti-falling net structure comprises an anti-falling net and a connecting piece, wherein connecting rings are arranged on four sides of the anti-falling net, the connecting piece comprises connecting bolts and sleeves which are connected in a matched mode, one ends of the connecting bolts are provided with connecting ring hanging grooves, the other ends of the connecting bolts are provided with external threads and are connected with nuts, the sleeves are inserted into original formwork screw reserved holes of the elevator shaft, and the connecting rings are arranged on the connecting ring hanging grooves and are tightly matched and fixed through the sleeves. The elevator shaft is provided with the connecting ring hanging groove, the connecting ring hanging groove is sleeved with the connecting ring hanging groove, the connecting ring hanging groove is fixedly arranged on the elevator shaft, the connecting ring hanging groove is fixedly connected with the connecting ring hanging groove, and the connecting ring hanging groove is fixedly connected with the connecting ring hanging groove.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to an elevator shaft anti-falling net structure with simple structure, simple and convenient construction procedure, safe construction and reliable strength and a construction process thereof.
Background
In building construction, the elevator shaft has more potential safety hazards, so that various modes are adopted for the protection of the elevator shaft by each building construction unit. If a hard anti-falling measure is adopted in the prior art, a plurality of working procedures such as a frame body erection, scaffold sheet installation and scaffold sheet laying are needed during construction, operators need to enter an elevator shaft for construction during the frame body installation process, and the high-altitude operation has a certain danger, and the structure is complex, the installation difficulty is high and the installation time is long; the hard anti-falling measures can cause secondary injury to falling personnel, personal safety of the falling personnel can not be ensured, and project cost expenditure can be increased due to long-term use of turnover materials such as steel pipes and the like; the common anti-falling net is adopted, but the connection firmness between the anti-falling net and the elevator shaft is poor, the construction difficulty is too high, the danger is high, and the anti-falling net is not popularized and applied.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide an elevator shaft anti-falling net structure with simple structure, simple and convenient construction process, safe construction and reliable strength and a construction process thereof.
An elevator shaft anti-falling net structure, including anti-falling net and install the connecting piece on the elevator shaft with anti-falling net, the wall of a well of elevator shaft is equipped with formwork screw rod preformed hole, and the four sides of anti-falling net correspond the position and are equipped with the go-between, its characterized in that the connecting piece includes connecting bolt and sleeve pipe, connecting bolt activity close-fitting sets up in the sleeve pipe, connecting bolt one end is equipped with the go-between hanging groove, the other end is equipped with the external screw thread and is connected with the nut, and connecting bolt's length is greater than sleeve pipe length, the sleeve pipe inserts in formwork screw rod preformed hole, the go-between sets up on the go-between hanging groove of connecting bolt one end, is fixed by the sleeve pipe close-fitting, the connecting bolt other end passes through the nut to be fixed outside at the elevator shaft four walls.
The elevator shaft anti-falling net structure is characterized in that slotted holes are formed in the side faces of two end parts of the sleeve, and limiting pieces are arranged at the outer end parts of the sleeve.
The elevator shaft anti-falling net structure is characterized in that the length of the slotted hole is matched with the length difference of the connecting bolt and the sleeve.
The elevator shaft anti-falling net structure is characterized in that elastic protrusions matched with the slotted holes in size are arranged on the side faces of the two end portions of the connecting bolt, and when the connecting bolt is connected with the sleeve, the elastic protrusions are located on the corresponding slotted holes, so that the connecting bolt can slide left and right on the sleeve, and deflection is prevented.
The elevator shaft anti-falling net structure is characterized in that the outer diameter of the connecting bolt is smaller than the inner diameter of the sleeve, and when the elastic bulge on the connecting bolt is ejected normally, the elastic bulge is positioned on the slotted hole and protrudes outwards relative to the sleeve, and can slide on the slotted hole.
The elevator shaft anti-falling net structure is characterized in that elastic protrusions at the outer end parts of the connecting bolts are located at the connection parts of the right ends of the threaded sections, and the distance between the elastic protrusions at the two end parts is matched with the distance between slotted holes at the two end parts of the sleeve.
The elevator shaft anti-falling net structure is characterized in that the outer end of the connecting bolt is of a hexagonal structure, and the thread section is located on the inner side of the hexagonal structure.
The elevator shaft anti-falling net structure is characterized in that the connecting ring hanging groove is formed by grooving the inner end of the connecting bolt from top to bottom, and a positioning block is arranged at the top of one side of the near end of the connecting ring hanging groove.
The elevator shaft anti-falling net structure is characterized in that the outer end of the connecting piece is sleeved with a rubber sleeve.
The construction process of the elevator shaft anti-falling net structure is characterized by comprising the following steps of:
1) All components are prepared according to the requirements of a design drawing: anti-falling nets, connecting rings, connecting bolts, sleeves, nuts and the like;
2) Fixing the connecting rings at corresponding positions around the anti-falling net according to the intervals of the reserved holes of the formwork supporting screw rods on the four walls of the elevator shaft, so that the reserved holes of the formwork supporting screw rods correspond to the positions of the connecting rings;
3) Sequentially inserting the sleeve into the reserved holes of the four-wall formwork supporting screw rods of the elevator shaft, abutting the limiting piece at the outer end part of the sleeve against the wall of the elevator shaft, adjusting the connecting bolt to enable the connecting ring hanging groove at the inner end of the connecting bolt to be upward, inserting the inner end of the connecting bolt into the sleeve, and rotating the connecting bolt left and right in the inserting process to enable the elastic bulge to pop out and extend out of the slotted hole of the sleeve, and continuously pushing the end head of the connecting ring hanging groove to extend out of the inner end of the sleeve; in this way, all the connectors are installed in place;
4) Hanging a connecting ring on the anti-falling net on a connecting ring hanging groove, positioning by a positioning block, preventing the connecting ring from sliding out and pulling the outer end of a connecting bolt outwards, enabling the inner end of the connecting bolt to be flush with the end part of the inner end of a sleeve, plugging the notch of the connecting ring hanging groove by the inner wall of the sleeve, locking the connecting ring in the connecting ring hanging groove space, and preventing slipping, thereby completing the hanging of the anti-falling net;
5) And (3) installing the nut into the outer end of the connecting bolt, screwing the nut, and sleeving a rubber sleeve on the exposed part of the outer end of the connecting piece to complete the installation of the anti-falling net.
By adopting the technology, compared with the prior art, the invention has the following beneficial effects:
1) According to the elevator shaft anti-falling net structure, the anti-falling net is fixed on the elevator shaft wall by adopting the limited elevator shaft anti-falling net structure and adopting the connecting pieces such as the sleeve, the connecting bolts and the like, and the original formwork supporting screw reserved holes of the elevator shaft are adopted as connecting sites, so that the steps of embedding reinforcing steel bars, punching expansion bolts and the like are omitted, the connecting bolts are pushed into the elevator shaft from the outer side to the inner side, the connecting rings on the anti-falling net are hung into the connecting ring hanging grooves, and then the connecting ring hanging grooves are sleeved with the sleeve to ensure stable structure; the components of the invention can be recycled, the turnover is strong, the construction cost is greatly reduced, and the economic benefit is improved;
2) According to the invention, the sleeve with a limited structure is matched with the connecting bolt, the limiting piece is arranged at the tail end of the sleeve in an extending mode, meanwhile, grooves are formed in the two sides of the sleeve, the outer end of the connecting bolt is of a hexagonal section, when the nut is screwed, a spanner is convenient to fix the connecting bolt, threads are arranged on the inner side of the hexagonal section and matched with the nut to fix the connecting bolt, symmetrical elastic protrusions are arranged at the two ends of the connecting screw and matched with the grooves on the sleeve, the bolt can slide in the sleeve, deflection is avoided, and operability of the connecting bolt is improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an enlarged view of a portion of the connection structure of the present invention;
FIG. 3 is a schematic view of the structure of the sleeve and the connecting screw in the connecting process;
FIG. 4 is a schematic view of a connecting bolt according to the present invention;
fig. 5 is a schematic structural view of the sleeve of the present invention.
In the figure: the anti-falling net comprises a 1-anti-falling net, a 101-connecting ring, a 2-well wall, a 3-elevator well, a 301-formwork screw preformed hole, a 4-connecting piece, a 41-connecting bolt, a 411-connecting ring hanging groove, a 412-elastic bulge, a 413-positioning block, a 42-sleeve, a 421-slotted hole, a 422-limiting piece, a 43-nut and a 44-rubber sleeve.
Detailed Description
The invention is further described below with reference to the accompanying drawings, but the scope of the invention is not limited thereto:
as shown in fig. 1-5, the elevator shaft anti-falling net structure comprises an anti-falling net 1 and a connecting piece 4 for installing the anti-falling net 1 on an elevator shaft 3, wherein a formwork screw preformed hole 301 is formed in a well wall 2 of the elevator shaft 3, connecting rings 101 are arranged at four sides of the anti-falling net 1 corresponding to the positions, the connecting piece 4 comprises connecting bolts 41 and a sleeve 42, the connecting bolts 41 are movably and tightly arranged in the sleeve 42, one end of each connecting bolt 41 is provided with a connecting ring hanging groove 411, the other end of each connecting bolt 41 is provided with external threads and is connected with a nut 43, the length of each connecting bolt 41 is larger than that of the sleeve 42, and the length of each slotted hole 421 is matched with the length difference between the connecting bolt 41 and the sleeve 42; the sleeve 42 is inserted into the reserved hole 301 of the formwork screw, the connecting ring 101 is arranged on the connecting ring hanging slot 411 at one end of the connecting bolt 41, the connecting ring is tightly fixed by the sleeve 42, and the other end of the connecting bolt 41 is fixed outside the wall 2 of the elevator shaft 3 through the nut 43.
In order to improve operability and prevent excessive insertion of the sleeve 42 and influence on construction time, the outer end part of the sleeve 42 is provided with the limiting piece 422, when the sleeve 42 is pushed to the bottom, the limiting piece 422 limits the sleeve, and meanwhile, the limiting piece 422 can prevent the nut 43 for fixing from directly contacting with the well wall 2 when the end part of the connecting bolt 41 is fixed on the well wall 2, so that the surface of the well wall 2 is prevented from being worn.
Meanwhile, in order to ensure that the connecting bolt 41 slides on the sleeve 42 accurately and prevents displacement, the side surfaces of the two end parts of the sleeve 42 are provided with the slotted holes 421, the side surfaces of the two end parts of the connecting bolt 41 are provided with the elastic protrusions 412 matched with the slotted holes 421 in size, and when the connecting bolt 41 is connected with the sleeve 42, the elastic protrusions 412 are positioned on the corresponding slotted holes 421, so that the connecting bolt 41 can slide left and right on the sleeve 42 and prevent deflection.
The elastic bulges 412 at the outer end of the connecting bolt 41 are positioned at the connection position of the right end of the threaded section, the distance between the elastic bulges 412 at the two ends is matched with the distance between the slotted holes 421 at the two ends of the sleeve 42, the push-pull distance of the connecting bolt 41 relative to the sleeve 42 can be limited, excessive push-pull is prevented, the outer end of the connecting bolt 41 is in a hexagonal structure, the threaded section is positioned at the inner side of the hexagonal structure, a spanner is convenient to fix and bear the connecting bolt 41 when the nut is screwed, and in order to improve the construction efficiency, the face of the outer end of the connecting bolt 41 is carved with an upward character, so that the opening at the right side of the connecting bolt 41 is always upward.
In order to prevent the connecting ring 101 from falling off, the connecting ring hanging slot 411 is formed by slotting the inner end part of the connecting bolt 41 from top to bottom, the top of one side of the near end part of the connecting ring hanging slot 411 is provided with a positioning block 413, the main rod symmetrically protrudes out of four circular elastic protruding clamping points and is matched with the slotting on the sleeve, so that the bolt can slide in the sleeve without deflection.
In order to prevent the exposed part of the connecting piece 4 from rusting, protect the safety of constructors and prevent the constructors from damaging the connecting piece 4 by accident during operation and avoid potential safety hazards, the outer end of the connecting piece 4 is sleeved with a rubber sleeve 44.
As shown in the figure, the construction process of the elevator shaft anti-falling net structure comprises the following steps:
1) All components are prepared according to the requirements of a design drawing: the anti-falling net 1, the connecting ring 101, the connecting bolt 41, the sleeve 42, the nut 43 and the like;
2) According to the intervals of the reserved holes 301 of the formwork supporting screws on the four walls of the elevator shaft 3, the connecting rings 101 are fixedly arranged at corresponding positions around the anti-falling net 1, and the reserved holes 301 of the formwork supporting screws correspond to the positions of the connecting rings 101;
3) Sequentially inserting the sleeve 42 into the reserved holes 301 of the four-wall formwork supporting screws of the elevator shaft 3, abutting the limiting piece 422 at the outer end part of the sleeve 42 against the wall of the elevator shaft 3, adjusting the connecting bolt 41 to enable the connecting ring hanging slot 411 at the inner end of the connecting bolt 41 to be upward, inserting the inner end of the connecting bolt 41 into the sleeve 42, and rotating the connecting bolt 41 left and right in the inserting process to enable the elastic bulge 412 to pop up and extend out of the slotted hole 421 of the sleeve 42, and continuously pushing the end of the connecting ring hanging slot 411 to extend out of the inner end of the sleeve 42; in this way, all the connectors 4 are mounted in place;
4) The connecting ring 101 on the anti-falling net 1 is hung on the connecting ring hanging slot 411 and is positioned by the positioning block 413, so that the outer end of the connecting bolt 41 is prevented from sliding outwards, the inner end of the connecting bolt 41 is flush with the end part of the inner end of the sleeve 42, the notch of the connecting ring hanging slot 411 is blocked by the inner wall of the sleeve 42, the connecting ring 101 is locked in the space of the connecting ring hanging slot 411, and slipping is prevented, so that the hanging of the anti-falling net 1 is completed;
5) The nut 43 is put into the outer end of the connecting bolt 41 and is screwed, and then the rubber sleeve 44 is sleeved on the exposed part of the outer end of the connecting piece 4, so that the installation of the anti-falling net is completed.
According to the elevator shaft anti-falling net structure, the obtained elevator shaft anti-falling net structure adopts factory customization of all parts, the design standardization is characterized, the safety and reliability of anti-falling net installation are realized, and the elevator shaft anti-falling net structure is beneficial to promoting standardized development of safety construction in the building industry; the invention has simple process, is beneficial to accelerating the installation progress, and in the whole installation process, an operator only needs to put the connecting ring into the connecting ring installation groove of the connecting screw rod by using the fork-shaped hanging rod and then screw the nut, so that the whole installation process is simple, and the installation time is greatly reduced; the operation is convenient, and the construction safety is ensured; the invention has simple and light components, is convenient for manual transportation and convenient and quick to install. The installation process does not require operator access to the interior of the hoistway. The whole installation operation process has definite flow and no dangerous operation time, so that the safety of the site is ensured; the anti-falling net adopted by the invention is a flexible net, and the flexible anti-falling net is adopted, so that compared with the traditional hard anti-falling measures, the risk of injury of falling personnel can be greatly reduced, the personal safety of the falling personnel is ensured, and the secondary injury caused by the traditional anti-falling structure is avoided; the novel elevator shaft anti-falling net installation facility has high standardization degree, and can be applied to the anti-falling net installation construction of most elevator shafts; the components of the invention can be recycled, the turnover is strong, the construction cost is greatly reduced, and the economic benefit is improved; is favorable for being promoted widely in construction sites in future.
Claims (7)
1. The utility model provides an elevator shaft anti-falling net structure, includes anti-falling net (1) and installs connecting piece (4) on elevator shaft (3) with anti-falling net (1), wall of a well (2) of elevator shaft (3) is equipped with formwork screw preformed hole (301), and the four sides of anti-falling net (1) correspond the position and are equipped with go-between (101), characterized in that connecting piece (4) include connecting bolt (41) and sleeve pipe (42), connecting bolt (41) movable close-fitting sets up in sleeve pipe (42), and connecting bolt (41) one end is equipped with go-between hanging groove (411), and the other end is equipped with external screw thread and is connected with nut (43), and connecting bolt (41) length is greater than sleeve pipe (42) length, and sleeve pipe (42) are inserted in formwork screw preformed hole (301), and go-between (101) set up on go-between hanging groove (411) of connecting bolt (41) one end, are fastened by sleeve pipe (42), and the other end of connecting bolt (41) is fixed outside four walls of elevator shaft (3) through nut (43); the side surfaces of the two ends of the sleeve (42) are provided with slotted holes (421), and the outer end of the sleeve (42) is provided with a limiting piece (422); the outer diameter of the connecting bolt (41) is smaller than the inner diameter of the sleeve (42), and when the elastic bulge (412) on the connecting bolt (41) is normally popped up, the elastic bulge (412) is positioned on the slotted hole (421) and protrudes outwards relative to the sleeve (42) and can slide on the slotted hole (421); the side of connecting bolt (41) both ends is equipped with elastic bulge (412) with slotted hole (421) size matching, and when connecting bolt (41) and sleeve pipe (42) were connected, elastic bulge (412) were located on corresponding slotted hole (421), can guarantee connecting bolt (41) left and right sliding on sleeve pipe (42), prevent the deflection.
2. The drop net structure of elevator shaft according to claim 1, characterized in that the length of the slot (421) matches the difference in length between the connecting bolt (41) and the sleeve (42).
3. The drop preventing net structure for elevator shaft according to claim 2, wherein the elastic protrusions (412) at the outer ends of the connecting bolts (41) are located at the right end connection of the threaded sections, and the distance between the elastic protrusions (412) at the two ends is matched with the distance between the slotted holes (421) at the two ends of the sleeve (42).
4. A drop net structure for an elevator shaft according to any one of claims 1-3, characterized in that the outer end of the connecting bolt (41) is provided with a hexagonal structure, and the thread segments are located inside the hexagonal structure.
5. A drop-preventing net structure for elevator shaft according to any one of claims 1-3, characterized in that the connecting ring hanging groove (411) is formed by grooving the inner end of the connecting bolt (41) from top to bottom, and the top of the side of the near end of the connecting ring hanging groove (411) is provided with a positioning block (413).
6. A drop-preventing net structure for elevator shafts according to any one of claims 1-3, characterized in that the outer end of the connecting piece (4) is sleeved with a rubber sleeve (44).
7. A construction process of the elevator shaft falling protection net structure according to claim 1, characterized by comprising the following steps:
1) All components are prepared according to the requirements of a design drawing: the anti-falling net (1), the connecting ring (101), the connecting bolt (41), the sleeve (42), the nut (43) and the like;
2) According to the intervals of the reserved holes (301) of the formwork supporting screws on the four walls of the elevator shaft (3), the connecting rings (101) are fixedly arranged at corresponding positions around the anti-falling net (1), and the reserved holes (301) of the formwork supporting screws correspond to the positions of the connecting rings (101);
3) Sequentially inserting the sleeve (42) into the reserved holes (301) of the four-wall formwork supporting screw of the elevator shaft (3), abutting a limiting piece (422) at the outer end part of the sleeve (42) against the wall of the elevator shaft (3), adjusting the connecting bolt (41) to enable a connecting ring hanging groove (411) at the inner end of the connecting bolt (41) to be upward, inserting the inner end of the connecting bolt (41) into the sleeve (42), and rotating the connecting bolt (41) left and right in the inserting process to enable the elastic bulge (412) to pop out and extend out of a slotted hole (421) of the sleeve (42), and continuously pushing the end of the connecting ring hanging groove (411) to extend out of the inner end of the sleeve (42); in this way, all the connectors (4) are mounted in place;
4) Hanging a connecting ring (101) on the anti-falling net (1) on a connecting ring hanging groove (411), positioning by a positioning block (413), and preventing slipping out of the outer end of a connecting bolt (41) to pull the inner end of the connecting bolt (41) outwards so as to enable the inner end of the connecting bolt to be flush with the inner end of a sleeve (42), blocking a notch of the connecting ring hanging groove (411) by the inner wall of the sleeve (42), locking the connecting ring (101) in the space of the connecting ring hanging groove (411), and preventing slipping, thereby completing the hanging of the anti-falling net (1);
5) And (3) installing the nut (43) at the outer end of the connecting bolt (41) and screwing, and sleeving a rubber sleeve (44) at the exposed part of the outer end of the connecting piece (4) to complete the installation of the anti-falling net.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910016070.9A CN109577668B (en) | 2019-01-08 | 2019-01-08 | Elevator shaft anti-falling net structure and construction process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910016070.9A CN109577668B (en) | 2019-01-08 | 2019-01-08 | Elevator shaft anti-falling net structure and construction process thereof |
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| Publication Number | Publication Date |
|---|---|
| CN109577668A CN109577668A (en) | 2019-04-05 |
| CN109577668B true CN109577668B (en) | 2023-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910016070.9A Active CN109577668B (en) | 2019-01-08 | 2019-01-08 | Elevator shaft anti-falling net structure and construction process thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2880045A1 (en) * | 2014-01-24 | 2015-07-24 | Henry Gembala | Construction safety screen system |
| CN204645570U (en) * | 2015-02-09 | 2015-09-16 | 中国建筑第八工程局有限公司 | One can have enough to meet the need elevator shaft protective platform |
| CN205189004U (en) * | 2015-11-17 | 2016-04-27 | 国网山东省电力公司潍坊供电公司 | Worker's well anti -falling device |
| CN207700729U (en) * | 2017-12-28 | 2018-08-07 | 山西五建集团有限公司 | The integral totally enclosed special upper people's escape way of tower crane |
| CN209538733U (en) * | 2019-01-08 | 2019-10-25 | 浙江省建设投资集团股份有限公司 | A kind of anti-fall web frame of elevator |
-
2019
- 2019-01-08 CN CN201910016070.9A patent/CN109577668B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2880045A1 (en) * | 2014-01-24 | 2015-07-24 | Henry Gembala | Construction safety screen system |
| CN204645570U (en) * | 2015-02-09 | 2015-09-16 | 中国建筑第八工程局有限公司 | One can have enough to meet the need elevator shaft protective platform |
| CN205189004U (en) * | 2015-11-17 | 2016-04-27 | 国网山东省电力公司潍坊供电公司 | Worker's well anti -falling device |
| CN207700729U (en) * | 2017-12-28 | 2018-08-07 | 山西五建集团有限公司 | The integral totally enclosed special upper people's escape way of tower crane |
| CN209538733U (en) * | 2019-01-08 | 2019-10-25 | 浙江省建设投资集团股份有限公司 | A kind of anti-fall web frame of elevator |
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| Publication number | Publication date |
|---|---|
| CN109577668A (en) | 2019-04-05 |
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