CN112031445B - Building construction safety device - Google Patents
Building construction safety device Download PDFInfo
- Publication number
- CN112031445B CN112031445B CN202010903922.9A CN202010903922A CN112031445B CN 112031445 B CN112031445 B CN 112031445B CN 202010903922 A CN202010903922 A CN 202010903922A CN 112031445 B CN112031445 B CN 112031445B
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- Prior art keywords
- supporting
- rod
- protection
- base
- fixing
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
- F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
Abstract
The invention provides a building construction safety protection device which comprises a protection net, a base and a protection plate, wherein the protection net is arranged above the protection plate, fixing seats are arranged on two sides of the base, a fixing device is arranged above the fixing seats, mounting grooves are formed in the fixing devices, the notches of the two mounting grooves face to each other, and two sides of the protection net are respectively inserted into the two mounting grooves; the fixing device is fixedly connected with the fixing seat through a bolt; the protection plate is installed between two fixing devices of the base, and a plurality of buffering devices are arranged between the protection plate and the bottom of the base. The safety protection device has a good protection effect on workers during building construction, meanwhile, the safety protection device effectively buffers the impact force of falling objects, firstly uses the protective net for protection and buffering, and then carries out buffering by the protective plate, and meanwhile, the safety protection device is convenient to detach and install.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a building construction safety protection device.
Background
With the development and progress of the building industry, various piling equipment is more and more, and the piling equipment is widely applied to construction sites such as buildings, bridges, mines, side slopes and the like. At present, in a foundation engineering construction site in the building industry, various piling equipment is various in types, different in mechanical structure and different in service time, and the equipment is overloaded and operated on the construction site for a long time, so that original safety devices and components on the equipment are damaged and abraded to different degrees, and hidden dangers of different safety degrees are formed.
In addition, the construction personnel on the construction site have large mobility, uneven comprehensive quality, poor safety consciousness and repeated and forbidden phenomena of 'three violations'. Therefore, the hidden danger checking, rectifying and safety protection measures are taken, and the method plays an important role in ensuring the safe construction of piling equipment and the safe production of the whole project engineering.
For example, patent document CN207348490U discloses a safety protection device for building construction, which comprises a protection plate and support frames connected to two ends of the protection plate; the support frame comprises a connecting rod and support mechanisms fixedly connected to two ends of the connecting rod; the supporting mechanism comprises a first supporting rod, a second supporting rod and a third supporting rod which are sequentially connected from top to bottom, the first supporting rod is connected with the second supporting rod through a spring, and the second supporting rod is connected with the third supporting rod through a positioning pin in a pin joint manner; patent document CN108396981A discloses a building construction safety protection device and method, including bottom movable roller, gyro wheel mount, thing work platform, main tributary supporting leg, servo inverter motor, bottom movable roller top is provided with the gyro wheel mount, gyro wheel mount top is provided with the travelling car, the travelling car top is provided with thing work platform, thing work platform one side is provided with the promotion pneumatic cylinder, hydraulic telescoping rod is installed to promotion pneumatic cylinder top, hydraulic telescoping rod installs the top main tributary supporting leg, top bearing structure is installed to main tributary supporting leg top. Patent document CN109025336A discloses a construction safety device, including first backup pad, first backup pad top is equipped with the second backup pad, second backup pad bottom end fixedly connected with gag lever post, the gag lever post bottom runs through in first backup pad, and gag lever post lower extreme swing joint in first backup pad, gag lever post bottom end fixedly connected with end cover, the gag lever post outside cover between first backup pad and the second backup pad has first spring, the pneumatic cylinder is installed to first backup pad below. Through the setting of pneumatic cylinder and bracing piece for the holistic height of device can be adjusted, through the setting of clamp plate and antiskid nail, makes the device monolithic stationary more firm, through the setting of first spring, gag lever post and second backup pad, realizes the two layers of protection of device, through roof, supporting seat and buffer's setting, realizes the three-layer buffering protection of device.
The above patent documents are all for ensuring the safety of the constructors to a certain extent, but need to be further improved, so that the safety of the constructors can be effectively ensured.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a building construction safety protection device.
Specifically, on one hand, the invention provides a building construction safety protection device which is characterized by comprising a protection net, a base and a protection plate, wherein the protection net is installed above the protection plate, fixing seats are arranged on two sides of the base, a fixing device is arranged above the fixing seats, mounting grooves are formed in the fixing device, the directions of notches of the two mounting grooves are opposite, and two sides of the protection net are respectively inserted into the two mounting grooves; the fixing device is fixedly connected with the fixing seat through a bolt; the protection plate is installed between two fixing devices of the base, a plurality of buffer devices are arranged between the protection plate and the bottom of the base, each buffer device comprises a telescopic rod and a telescopic sleeve, a spring is arranged in each telescopic sleeve, a groove corresponding to each telescopic rod is formed in each protection plate, the lower end of each telescopic rod extends into each telescopic sleeve and is located above the corresponding spring, the upper end of each telescopic rod extends into the corresponding groove, and the lower end of each telescopic sleeve abuts against the bottom of the base; and a supporting device is arranged below the base and used for supporting and adjusting the height of the base.
Preferably, the strutting arrangement includes supporting shoe, stopper, bracing piece and hollow post, be provided with the stopper between supporting shoe and the bracing piece, vertical activity is inserted and is equipped with the bracing piece in the hollow post, be provided with the tip on the lower extreme of bracing piece, wherein, tip and bracing piece structure as an organic whole, the upper end opening part of hollow post is inserted and is equipped with the anti-disengaging subassembly, and the anti-disengaging subassembly cover is established at the bracing piece periphery, and the overlap joint is in hollow post upper end, prevents that the bracing piece from breaking away from the hollow post, the cover is equipped with first spring on the bracing piece between anti-disengaging subassembly and the stopper.
Preferably, the lower extreme of well cavity post is provided with the connecting seat, the integrative setting of connecting seat and well cavity post, the through-hole has been seted up on the connecting seat, the carriage release lever passes the through-hole butt and is in the tip lower extreme of bracing piece, be provided with the second spring between the connecting seat of the tip of bracing piece and well cavity post, the second spring cover is established on the carriage release lever.
Preferably, well cavity post lower extreme is provided with the carriage release lever, the bottom of carriage release lever is provided with two connecting pieces, two the equal movable mounting of connecting piece has the supporting seat, two be provided with the third spring between the connecting piece.
Preferably, the anti-disengaging assembly comprises an upper end portion and a lower end portion, the upper end portion and the lower end portion are integrally formed, the upper end portion is sleeved on the periphery of the supporting rod, the upper end portion is overlapped at an opening of the upper end of the hollow column, the lower end portion is sleeved outside the supporting rod and is located between the supporting rod and the hollow column, the lower end face of the lower end portion is abutted to the upper end face of the end portion of the supporting rod.
Preferably, a threaded hole is formed in the bottom of the base, and the bolt penetrates through the threaded hole to be fixedly connected with the supporting block.
Preferably, the number of the supporting devices is 4, and the supporting devices are respectively positioned on four corners of the base.
On the other hand, the invention provides a building construction safety protection method, which is suitable for the safety protection device and comprises the following steps:
s1: installing a protective device at a construction site;
s2: when falling objects at high altitude occur, firstly using a protective net for protection, and starting the protective plate for buffering if the weight of the falling objects at high altitude is greater than a first preset value so that the protective plate slides and buffers between the two fixing devices of the base; if the weight of the falling object is greater than a second preset value, starting the supporting device for buffering;
s3: vibrations pass through the supporting shoe and convey the bracing piece, and the bracing piece drives the carriage release lever downstream in the vertical slip of cavity post, keeps away from the connecting piece tip of carriage release lever and all outwards slides, gives the supporting seat with power transmission, cushions.
Preferably, the method for installing the guard in step S1 includes the following steps:
s11: inserting a support rod with an end part into a hollow structure of the hollow column, and sequentially sleeving a slip-preventing component and a spring on the periphery of the support rod;
s12: the movable rod penetrates through the through hole of the connecting seat, so that the movable rod is abutted against the lower end of the end part of the supporting rod, the movable rod is connected with the connecting piece, and the connecting piece is fixedly connected with the supporting seat;
s13: a bolt penetrates through the through hole of the base to fixedly connect the base with the supporting block of the supporting device; a buffer device and a protection plate on the buffer device are arranged;
s14: and (4) placing the fixing device provided with the protective net on the corresponding fixing seat, and fixing the fixing device through the threaded rod and the nut, namely finishing the installation.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention firstly protects through the protective net, if the weight of the falling object is larger than a first preset value, the protective plate is started for buffering, and if the weight of the falling object is larger than a second preset value, the supporting device is started for buffering, namely the invention uses the two-stage protective device for protection, and uses the several-stage buffer devices for buffering, thereby reducing the operation risk.
(2) The safety protection device has a good protection effect on workers during building construction, meanwhile, the safety protection device effectively buffers the impact force of falling objects, firstly uses the protective net for protection and buffering, and then carries out buffering by the protective plate, and meanwhile, the safety protection device is convenient to detach and mount.
(3) In order to prevent the support rod from being separated from the hollow column, the lower end of the support rod is provided with an end part, and meanwhile, a separation-preventing component is inserted into an opening at the upper end of the hollow column and comprises an upper end part and a lower end part, and the upper end part and the lower end part are in threaded connection with the inner side wall of the hollow column; when the supporting rod is extended to the maximum length in the hollow column, the anti-falling component is abutted against the end part of the supporting rod; therefore, the anti-drop assembly provided by the invention can prevent the support rod from being dropped in the hollow column.
(4) The bottom end of the moving rod is provided with the two connecting pieces, the two connecting pieces are movably provided with the supporting seat, and the compression spring is arranged between the connecting pieces, so that the structural stability of the mounting device is enhanced, the vibration force can be effectively buffered, the vibration force is transmitted from the moving rod to the connecting pieces, and then the force is transmitted to the supporting seat through the connecting pieces, so that the buffering is effectively realized, and the stability of the safety protection device is improved.
Drawings
Fig. 1 is an installation perspective view of a protection net and a protection plate provided by the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 illustrates a cushioning device according to the present invention;
FIG. 4 is a cross-sectional view taken along A-A of FIG. 3;
fig. 5 is a cross-sectional view of a support device provided by the present invention.
The reference numbers are as follows:
1. a protective net; 2. a protection plate; 3. a fixed seat; 4. a fixing device; 5. a buffer device; 51: a telescopic sleeve; 52: stretching; 53: a compression spring; 6. a support device; 61: a support block; 62: a limiting block; 63: a first spring; 64: a support bar; 65: an end portion; 66: a drop-out prevention assembly; 67: a hollow column; 68: a connecting seat; 69: a second spring; 70: a travel bar; 71: a connecting member; 72: a third spring; 73: and (4) supporting the base.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
Specifically, on one hand, the invention provides a building construction safety protection device which comprises a protection net 1, a base and a protection plate 2, wherein the protection net 1 is installed above the protection plate 2, fixing seats 3 are arranged on two sides of the base, a fixing device 4 is arranged above the fixing seats 3, mounting grooves are formed in the fixing devices 4, the directions of notches of the two mounting grooves are opposite, and two sides of the protection net 1 are respectively inserted into the two mounting grooves; the fixing device and the fixing seat are fixedly connected through a screw and a nut; the protection plate 2 is arranged between two fixed seats 3 of the base, and a plurality of buffer devices 5 are arranged between the protection plate 2 and the bottom of the base; the buffer device 5 comprises an expansion link 52 and an expansion sleeve 51, a compression spring 53 is arranged in the expansion sleeve 51, a groove corresponding to the expansion link 52 is formed in the protection plate 2, the lower end of the expansion link extends into the expansion sleeve 51 and is positioned above the compression spring, the upper end of the expansion link 52 extends into the corresponding groove, and the lower end of the expansion sleeve 51 is abutted against the bottom of the base; a support device 6 is arranged below the base and used for supporting and adjusting the height of the base.
As a preferred embodiment, the supporting device 6 provided by the present invention comprises a supporting block 61, a limiting block 62, a supporting rod 64 and a hollow column 67, a limiting block 62 is arranged between the supporting block 61 and the supporting rod 64, the supporting rod 64 is vertically and movably inserted in the hollow column 67, the lower end of the supporting rod is provided with an end part 65, wherein, the end part 65 and the support bar 64 are integrated into a whole, the opening at the upper end of the hollow column is inserted with a slip-off preventing component 66, the slip-off preventing component 66 is sleeved on the periphery of the support bar 64 and is lapped at the opening at the upper end of the hollow column 67 to prevent the support bar 64 from separating from the hollow column 67, a first spring 63 is sleeved on the support rod 64 between the anti-slip component 66 and the limit block 62, when the hollow column vibrates, the supporting block drives the limiting block to move downwards, so that the compression supporting rod slowly slides in the hollow column to play a certain buffering role. The supporting device provided by the invention also comprises a sleeve, wherein a supporting rod, a hollow column and a moving rod are sequentially arranged in the sleeve from top to bottom.
The invention provides a slip-off prevention assembly which comprises an upper end part and a lower end part, wherein the upper end part and the lower end part are in threaded connection with the inner side wall of a hollow column. The anti-slip component can prevent the support rod from slipping from the hollow column, and when the support rod extends to the maximum length in the hollow column, the anti-slip component is abutted against the end part of the support rod.
As a preferred embodiment, the lower end of the hollow column 67 provided by the present invention is provided with a connecting seat 68, the connecting seat 68 and the hollow column 67 are integrally provided, a through hole is formed on the connecting seat 68, the moving rod 70 passes through the through hole and abuts against the lower end of the end portion 65 of the supporting rod 64, a second spring 69 is provided between the end portion 65 of the supporting rod 64 and the connecting seat 68 of the hollow column 67, and the second spring 69 is sleeved on the moving rod 70.
In a preferred embodiment, the hollow column 67 provided by the present invention is provided with a moving rod 70 at the lower end thereof, the moving rod 70 is provided with two connecting pieces 71 at the bottom end thereof, the two connecting pieces 71 are movably provided with a supporting seat 73, and a third spring 72 is arranged between the two connecting pieces 71. The end part of the support rod provided by the invention drives the moving rod to move, when the moving rod moves downwards, the two connecting pieces connected to the bottom end of the moving rod are respectively separated towards the left and the right, and the included angle of the two connecting pieces is increased, so that the connecting pieces drive the support seat to be separated towards the two sides, and the effect of buffering vibration is achieved. Therefore, the structure not only strengthens the structural stability of the mounting device, but also can effectively buffer, so that the vibration force is transmitted to the connecting piece from the moving rod, and then the force is transmitted to the supporting seat through the connecting piece, thereby effectively buffering and improving the stability of the safety protection device.
Preferably, the anti-disengaging assembly comprises an upper end portion and a lower end portion, the upper end portion and the lower end portion are integrally formed, the upper end portion is sleeved on the periphery of the supporting rod, the upper end portion is overlapped at an opening of the upper end of the hollow column, the lower end portion is sleeved outside the supporting rod and is located between the supporting rod and the hollow column, the lower end face of the lower end portion is abutted to the upper end face of the end portion of the supporting rod.
Preferably, a threaded hole is formed in the bottom of the base, and the bolt penetrates through the threaded hole to be fixedly connected with the supporting block.
Preferably, the number of the supporting devices is 4, and the supporting devices are respectively positioned on four corners of the base.
On the other hand, the invention provides a building construction safety protection method, which is suitable for the safety protection device and comprises the following steps:
s1: installing a protective device at a construction site;
s2: when falling objects at high altitude occur, firstly using a protective net for protection, and starting the protective plate for buffering if the weight of the falling objects at high altitude is greater than a first preset value so that the protective plate slides and buffers between the two fixing devices of the base; if the weight of the falling object is greater than a second preset value, starting the supporting device for buffering;
s3: vibrations pass through the supporting shoe and convey the bracing piece, and the bracing piece drives the carriage release lever downstream in the vertical slip of cavity post, keeps away from the connecting piece tip of carriage release lever and all outwards slides, gives the supporting seat with power transmission, cushions.
Preferably, the method for installing the guard in step S1 includes the following steps:
s11: inserting a support rod with an end part into a hollow structure of the hollow column, and sequentially sleeving a slip-preventing component and a spring on the periphery of the support rod;
s12: the movable rod penetrates through the through hole of the connecting seat, so that the movable rod is abutted against the lower end of the end part of the supporting rod, the movable rod is connected with the connecting piece, and the connecting piece is fixedly connected with the supporting seat;
s13: a bolt penetrates through the through hole of the base to fixedly connect the base with the supporting block of the supporting device; a buffer device and a protection plate on the buffer device are arranged;
s14: and (4) placing the fixing device provided with the protective net on the corresponding fixing seat, and fixing the fixing device through the threaded rod and the nut, namely finishing the installation.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (6)
1. The building construction safety protection device is characterized by comprising a protection net, a base and protection plates, wherein the protection net is installed above the protection plates, fixing seats are arranged on two sides of the base, fixing devices are arranged above the fixing seats, mounting grooves are formed in the fixing devices, the notches of the two mounting grooves face to each other, and two sides of the protection net are respectively inserted into the two mounting grooves; the fixing device is fixedly connected with the fixing seat through a bolt; the protection plate is installed between two fixed seats of the base, a plurality of buffer devices are arranged between the protection plate and the bottom of the base, each buffer device comprises a telescopic rod and a telescopic sleeve, a compression spring is arranged in each telescopic sleeve, a groove corresponding to each telescopic rod is formed in each protection plate, the lower end of each telescopic rod extends into each telescopic sleeve and is located above each spring, the upper end of each telescopic rod extends into the corresponding groove, and the lower end of each telescopic sleeve abuts against the bottom of the base; a supporting device is arranged below the base and used for supporting and adjusting the height of the base;
the supporting device comprises a supporting block, a limiting block, a supporting rod and a hollow column, the limiting block is arranged between the supporting block and the supporting rod, the supporting rod is vertically and movably inserted into the hollow column, the lower end of the supporting rod is provided with an end part, the end part and the supporting rod are of an integral structure, a release-preventing component is inserted into an opening at the upper end of the hollow column, the release-preventing component is sleeved on the periphery of the supporting rod and is overlapped at the upper end of the hollow column to prevent the supporting rod from being separated from the hollow column, and a first spring is sleeved on the supporting rod between the release-preventing component and the limiting block;
a moving rod is arranged at the lower end of the hollow column, two connecting pieces are arranged at the bottom end of the moving rod, a supporting seat is movably arranged on each of the two connecting pieces, and a third spring is arranged between the two connecting pieces;
the lower extreme of well cavity post is provided with the connecting seat, the integrative setting of connecting seat and well cavity post, the through-hole has been seted up on the connecting seat, the carriage release lever passes the through-hole butt and is in the tip lower extreme of bracing piece, be provided with the second spring between the tip of bracing piece and the connecting seat of well cavity post, the second spring housing is established on the carriage release lever.
2. The construction safety device according to claim 1, wherein the anti-slip assembly comprises an upper end and a lower end, the upper end and the lower end are integrally formed, the upper end is sleeved on the periphery of the support rod and is lapped at the upper opening of the hollow column, the lower end is sleeved outside the support rod and is located between the support rod and the hollow column, the lower end surface of the lower end is abutted against the upper end surface of the end of the support rod.
3. The construction safety device according to claim 1, wherein the base has a threaded hole formed in a bottom thereof, and a bolt is fixedly coupled to the support block through the threaded hole.
4. The construction safety device according to claim 1, wherein the number of the supporting means is 4, and the supporting means is located at four corners of the base.
5. A construction safety protection method, which is applied to the safety protection device of any one of claims 1-4, and is characterized by comprising the following steps:
s1: installing a protective device at a construction site;
s2: when falling objects at high altitude occur, firstly using a protective net for protection, and starting the protective plate for buffering if the weight of the falling objects at high altitude is greater than a first preset value so that the protective plate slides and buffers between the two fixing devices of the base; if the weight of the falling object is greater than a second preset value, starting the supporting device for buffering;
s3: vibrations pass through the supporting shoe and convey the bracing piece, and the bracing piece drives the carriage release lever downstream in the vertical slip of cavity post, keeps away from the connecting piece tip of carriage release lever and all outwards slides, gives the supporting seat with power transmission, cushions.
6. The construction safety protection method according to claim 5, wherein the method for installing the protection device in the step S1 comprises the following steps:
s11: inserting a support rod with an end part into a hollow structure of the hollow column, and sequentially sleeving a slip-preventing component and a spring on the periphery of the support rod;
s12: the movable rod penetrates through the through hole of the connecting seat, so that the movable rod is abutted against the lower end of the end part of the supporting rod, the movable rod is connected with the connecting piece, and the connecting piece is fixedly connected with the supporting seat;
s13: a bolt penetrates through the through hole of the base to fixedly connect the base with the supporting block of the supporting device; a buffer device and a protection plate on the buffer device are arranged;
s14: and (4) placing the fixing device provided with the protective net on the corresponding fixing seat, and fixing the fixing device through the threaded rod and the nut, namely finishing the installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010903922.9A CN112031445B (en) | 2020-09-01 | 2020-09-01 | Building construction safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010903922.9A CN112031445B (en) | 2020-09-01 | 2020-09-01 | Building construction safety device |
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| Publication Number | Publication Date |
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| CN112031445A CN112031445A (en) | 2020-12-04 |
| CN112031445B true CN112031445B (en) | 2021-11-05 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2420544B (en) * | 2005-11-28 | 2007-02-28 | Rapid Rail Internat Ltd | Fall arrest support |
| CN207672431U (en) * | 2017-06-01 | 2018-07-31 | 江毓锋 | A kind of protection mechanism for bridge construction |
| CN207739662U (en) * | 2018-01-19 | 2018-08-17 | 詹夏丹 | A kind of construction site safety device |
| CN109025336B (en) * | 2018-08-09 | 2020-12-01 | 江苏杰辰五金制品有限公司 | Building construction safety protection device and construction method thereof |
| CN209145317U (en) * | 2018-10-15 | 2019-07-23 | 北京城建六建设集团有限公司 | A kind of floor edge safeguard structure |
| CN210685462U (en) * | 2019-08-05 | 2020-06-05 | 刘鹏娟 | Safety protection device for operating platform for masonry construction |
| CN211201226U (en) * | 2019-09-26 | 2020-08-07 | 中交一公局集团有限公司 | Building construction is with preventing high altitude whereabouts thing buffer |
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2020
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