CN110748141A - Building site construction is with preventing high altitude falling injures protector by a crashing object - Google Patents
Building site construction is with preventing high altitude falling injures protector by a crashing object Download PDFInfo
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- CN110748141A CN110748141A CN201910891702.6A CN201910891702A CN110748141A CN 110748141 A CN110748141 A CN 110748141A CN 201910891702 A CN201910891702 A CN 201910891702A CN 110748141 A CN110748141 A CN 110748141A
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- protection
- falling
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- net
- outer frame
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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
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/001—Safety or protective measures against falling down relating to scaffoldings
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
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Abstract
The invention belongs to the technical field of protection of construction site operation, and particularly relates to a high-altitude falling and injury prevention protection device for construction of a construction site, which comprises a falling protection component, wherein the falling protection component comprises a protection outer frame hinged on a transverse rod of a scaffold and a falling prevention net fixedly connected to the inner wall of the protection outer frame, one side of the inner wall of the protection outer frame is hinged with a guide protection component, and the guide protection component comprises a protection inner frame hinged on one side of the inner wall of the protection outer frame and a primary guide net fixedly connected to the inner wall of the protection inner frame; the protection component, the guide protection component and the protection connecting net form a triangular structure, so that foreign matters can be effectively protected, secondary falling is prevented, the foreign matters can be effectively limited among the falling protection component, the guide protection component and the protection connecting net through the protection connecting net, the condition that the foreign matters fall secondarily is effectively avoided, and the protection effect on operators is improved.
Description
Technical Field
The invention belongs to the technical field of construction site operation protection, and particularly relates to a high-altitude falling and smashing injury prevention protection device for construction of a building site.
Background
The building site is a place where building projects are being developed and civil engineering is carried out, the range of the building site is often sealed by coamings, wire netting or enclosing walls, the access of personnel, materials, machinery and vehicles is limited, a property management administrator keeps watch on the building site, the identity of the person is possibly registered when the person comes in or goes out, and a safety helmet is worn, a scaffold is often needed to be used during building operation, and the scaffold is a working platform which is erected for ensuring that each construction process is carried out smoothly.
Because the scaffold frame is open structure, consequently the condition that the foreign matter dropped appears easily, when operating personnel is in the operation, if hit by the foreign matter in, the consequence can not imagine, along with the improvement of safety consciousness, people can set up the anti-falling net in scaffold frame periphery now, because the anti-falling net is planar structure, the foreign matter falls and receives the gravity influence after, and speed increases, when falling on the anti-falling net, receives the bounce, falls to ground from the protection network periphery easily, still exists the potential safety hazard.
Disclosure of Invention
To solve the problems set forth in the background art described above. The invention provides a high-altitude falling and smashing prevention protection device for construction of a building site, which has the characteristics of multi-azimuth protection and convenience in inspection and maintenance.
In order to achieve the purpose, the invention provides the following technical scheme: the anti-falling device comprises a falling protection component, the falling protection component comprises a protection outer frame hinged on a transverse rod of a scaffold and an anti-falling net fixedly connected on the inner wall of the protection outer frame, one side of the inner wall of the protection outer frame is hinged with a guide protection component, the guide protection component comprises a protection inner frame hinged on one side of the inner wall of the protection outer frame and a primary guide net fixedly connected on the inner wall of the protection inner frame, the bottom surface of the protection inner frame and one end of the upper end surface of the falling protection component, which is far away from the hinged part of the protection inner frame and the protective connecting net, are connected through a protection connecting net, one end of the outer wall of the protection outer frame, which is far away from the protective connecting net, is fixedly connected with a plurality of uniformly distributed fixed hinged buckles, two symmetrically distributed fixed lugs are fixedly connected with the upper end surface of the protection outer frame and one end of the upper end, the other end of the control connecting cable penetrates through a guide control component, operation control components are arranged at the bottom of the guide control component, the number of the guide control components is four, every two guide control components are distributed on longitudinal rods at two ends of a transverse rod of the scaffold, the number of the operation control components is two, the operation control components are fixedly connected to the bottoms of the two longitudinal rods respectively, and every two of the four control connecting cables are fixed on the two operation control components.
Preferably, the direction control part includes the connector link of fixed connection on longitudinal rod and fixed connection is in the guide block of connector link one side, the spread groove has been seted up to the guide block up end, the spread groove internal rotation is connected with guide roller, sliding connection has on the guide roller the control connection cable.
Preferably, two of said guide blocks on each of said longitudinal bars are located on either side of said longitudinal bar.
Preferably, the operation control part comprises a fixed block fixedly connected to the longitudinal rod and control locking hand wheels rotatably connected to two sides of the fixed block, and one end of each control connecting cable is fixedly connected to four control locking hand wheels respectively.
Preferably, the outer walls of the control locking hand wheels are rotatably connected with operating handles.
Preferably, the control locking hand wheel is positioned right below the guide block.
Preferably, the aperture of the primary guiding net is larger than the apertures of the falling-prevention net and the protection connecting net.
Preferably, the material of the protection connecting net is nylon.
Preferably, when the guiding protection component rotates upwards, the falling protection component and the guiding protection component form a triangle after being subjected to the pulling action of the protection connecting net.
Preferably, the inner diameter of the protective outer frame is the same as the outer diameter of the protective inner frame.
Compared with the prior art, the invention has the beneficial effects that:
1. the falling protection component, the guiding protection component and the protection connecting net form a triangular structure, the inclination direction of the guiding protection component is the inner side of the scaffold, when the foreign matters fall, the gravity is decomposed into vertical downward force and horizontal force to the scaffold through the inclined guiding protection component, the foreign matters can be effectively prevented from rebounding to the outer part of the falling protection component through the influence of the decomposition force in the horizontal direction, so as to fall to the ground, when the foreign matters are sharp, the foreign matters firstly puncture or pass through the primary guiding net, part of the gravity of the foreign matters is effectively offset through the primary guiding net, at the moment, the foreign matters fall into the falling prevention net, the foreign matters can be effectively protected, so as to prevent the secondary falling, and the foreign matters can be effectively limited among the falling protection component, the guiding protection component and the protection connecting net through the protection connecting net, so as to effectively avoid the condition of the, the protection effect on the operators is effectively improved;
2. because the fall protection component, the guide protection component and the protection connecting net are easy to cause the reduction of the service life after long-term use, the control connecting cable is driven to be rolled up by the control locking hand wheel at the moment, so that the fall protection component and the guide protection component are driven to rotate towards the scaffold, when the fall protection component and the guide protection component are parallel to the longitudinal rod of the scaffold, the fall protection net and the one-time guide net can be sewn or replaced, and the convenience of maintenance and replacement is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the formation of the fall protection component, the guide protection component and the protective connecting net of the present invention;
FIG. 3 is a schematic view of the linkage of the operation control part and the guiding control part in the present invention;
fig. 4 is a schematic diagram of the force analysis and the falling direction of the falling foreign body according to the present invention.
In the figure: 1. a fall protection component; 11. a protective outer frame; 12. a falling prevention net; 13. fixing the hinged buckle; 2. a guide protection member; 21. a protective inner frame; 22. a primary guiding net; 3. a protection connection network; 4. a control connecting cable; 5. a guidance control part; 51. a connecting buckle; 52. a guide block; 521. connecting grooves; 53. a guide roller; 6. an operation control part; 61. a fixed block; 62. controlling a locking hand wheel; 63. an operating handle; 7. and fixing the support lug.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention, and for convenience of description, the description of the relative positional relationship of the components is described according to the layout manner of the drawings in the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the specification layout direction.
Referring to fig. 1-4, the present invention provides the following technical solutions: a high-altitude falling and injury-preventing protection device for construction of building sites comprises a falling protection part 1, wherein the falling protection part 1 comprises a protection outer frame 11 hinged on a transverse rod of a scaffold and a falling prevention net 12 fixedly connected on the inner wall of the protection outer frame 11, one side of the inner wall of the protection outer frame 11 is hinged with a guide protection part 2, the guide protection part 2 comprises a protection inner frame 21 hinged on one side of the inner wall of the protection outer frame 11 and a primary guide net 22 fixedly connected on the inner wall of the protection inner frame 21, the bottom surface of the protection inner frame 21 and one end of the upper end surface of the falling protection part 1, which is far away from the hinged part of the protection inner frame and the falling protection part, are connected through a protection connecting net 3, one end of the outer wall of the protection outer frame 11, which is far away from the protection connecting net 3, is fixedly connected with a plurality of uniformly distributed fixed hinged buckles 13, and two symmetrically distributed fixed lugs 7 are, equal fixedly connected with control connection cable 4 on fixed journal stirrup 7, the other end of control connection cable 4 has all passed direction control part 5, 5 bottoms of direction control part all are equipped with operation control part 6, the quantity of direction control part 5 is four, two liang of distributions of direction control part 5 are on the longitudinal rod at scaffold frame horizontal pole both ends, 6 quantity of operation control part are two, operation control part 6 is fixed connection in two longitudinal rod bottoms respectively, two liang of fixes on two operation control part 6 of four control connection cables 4.
In this embodiment: the length of the protection outer frame 11 is consistent with the space size of two longitudinal rods of an actual scaffold, when the scaffold is in a standing state, the protection inner frame 21 is positioned inside the protection outer frame 11, so that the convenience of transportation is improved, when the scaffold is in use, the protection inner frame 21 is hinged with the protection outer frame 11, so that the protection inner frame 21 inclines to one side of the scaffold, because the protection inner frame 21 and the protection outer frame 11 are pulled by the protection connecting net 3, an included angle formed by the protection inner frame 21 and the protection outer frame 11 is fixed, the included angle between the protection inner frame 21 and the protection outer frame 11 is thirty degrees, when a foreign object sharp passes through the primary guide net 22 and falls on the anti-falling net 12, gravity still exists at the moment, when the foreign object is contacted with the anti-falling net 12 to cause the foreign object to bounce, the foreign object can be effectively prevented from falling from the outside of the anti-falling net 12 through the protection connecting net 3, and the other two sides of the, mainly because the scaffold on the construction site is large, a multi-end device is needed for splicing, foreign matters can be protected even if two sides of the anti-falling net 12 and the primary guide net 22 are open, when splicing breakpoints occur, the other two sides of the anti-falling net 12 and the primary guide net 22 still need to be selected to be protected and connected with the net 3 according to actual conditions, the protective outer frame 11 is hinged with the scaffold transverse rod through a plurality of fixed hinge buckles 13, the fixed hinge buckles 13 are composed of two hinged semicircular buckles, the buckles are fixed by screws, the protective outer frame 11 can rotate on the scaffold transverse rod under the influence of the fixed hinge buckles 13 through the fixed hinge buckles 13, the protective outer frame 11 and the protective inner frame 21 are subjected to angle adjustment under the influence of the tension of the control connecting cables 4, the control connecting cables 4 are made of steel wire ropes, the wear resistance can be effectively improved, and the service life can be effectively prolonged, the protective outer frame 11 and the protective inner frame 21 are both provided with fixed support lugs 7, and the fixed support lugs 7 facilitate the fixing of the control connecting cable 4; when the foreign matter falls, gravity is decomposed into vertical decurrent power and level to the power of scaffold frame through the direction protection component 2 of slope, can effectually prevent that the foreign matter from rebounding to falling protection component 1 outside through the decomposition power influence of horizontal direction, thereby drop to ground, when the foreign matter is sharp-pointed, at first puncture or pass once guide net 22, effectively offset some foreign matter gravity through once guide net 22, the foreign matter falls in anti-falling net 12 this moment, thereby effectively avoided the condition of foreign matter secondary whereabouts, effectively improved the guard action to the operation personnel.
Specifically, the guide control part 5 comprises a connecting buckle 51 fixedly connected to the longitudinal rod and a guide block 52 fixedly connected to one side of the connecting buckle 51, a connecting groove 521 is formed in the upper end face of the guide block 52, a guide roller 53 is rotatably connected in the connecting groove 521, and a control connecting cable is slidably connected to the guide roller 53; guide roller 53 can lead the direction of control connection cable 4 to make control connection cable 4 vertical downwards, be convenient for control lock dead hand wheel 62 carries out the rolling, and control connection cable 4 is vertical can reduce taking in space.
Specifically, two guide blocks 52 on each longitudinal bar are located on both sides of the longitudinal bar; since the protection inner frame 21 is hinged in the protection outer frame 11, the width of the protection outer frame 11 is larger than that of the protection inner frame 21, the control connecting cable 4 for the protection inner frame 21 is guided by the guide blocks 52 on the inner side of the longitudinal rod, and the control connecting cable 4 for the protection outer frame 11 is guided by the guide blocks 52 on the outer side of the longitudinal rod.
Specifically, the operation control part 6 comprises a fixed block 61 fixedly connected to the longitudinal rod and control locking hand wheels 62 rotatably connected to two sides of the fixed block 61, and one ends of four control connecting cables 4 are respectively and fixedly connected to the four control locking hand wheels 62; the rotation directions of the fall protection component 1 and the guide protection component 2 are controlled by the four control locking hand wheels 62, so that the fall protection component and the guide protection component can be unfolded or stored according to actual working conditions, the applicability of the device is improved, the control locking hand wheels 62 have a locking function, and the working principle is consistent with that of a simple hand wheel (CN105589507B) disclosed in Chinese patent.
Specifically, the outer walls of the control locking hand wheels 62 are rotatably connected with operating handles 63; the operation handle 63 makes the rotation easier and more convenient.
Specifically, the control locking handwheel 62 is positioned right below the guide block 52; when the guide block 52 is located above, the control connecting cable 4 can be driven to pull the protection outer frame 11 and the protection inner frame 21 upwards, so that the protection outer frame 11 and the protection inner frame 21 can rotate.
Specifically, the aperture of the primary guiding net 22 is larger than the apertures of the falling prevention net 12 and the protection connecting net 3; the primary guide net 22 mainly plays roles of guiding falling of falling foreign matters and buffering at a time, the primary guide net 22 does not have a falling-preventing function, the falling speed of the foreign matters is reduced after the foreign matters are buffered by the primary guide net 22, the foreign matters are intercepted and protected by the falling-preventing net 12, the impact force of the foreign matters on the falling-preventing net 12 is reduced, and therefore the service life of the falling-preventing net 12 can be prolonged.
Specifically, the protective connecting net 3 is made of nylon; the protective connecting net 3 made of nylon material can deform when the protective outer frame 11 and the protective inner frame 21 are folded, and the folding of the protective outer frame and the protective inner frame is not affected.
Specifically, when the guiding protection component 2 rotates upwards, the falling protection component 1 and the guiding protection component 2 form a triangle after being pulled by the protection connecting net 3; through falling protection part 1, direction protection part 2 and protection connecting network 3 formation triangle-shaped structure, the direction of inclination of direction protection part 2 is the scaffold frame inboard, and when the foreign matter falls, gravity is decomposed into vertical decurrent power and level to the power of scaffold frame to the gravity through the direction protection part 2 of slope, and the decomposition power influence through the horizontal direction can effectually prevent that the foreign matter from rebounding to falling protection part 1 outside.
Specifically, the inner diameter of the protection outer frame 11 is the same as the outer diameter of the protection inner frame 21; when the outer diameter of the protection inner frame 21 is the same as the inner diameter of the protection outer frame 11, the protection inner frame 21 can be contained in the protection outer frame 11, and the occupied space is reduced.
The working principle and the using process of the invention are as follows: when the scaffold is used, two operators operate the falling protection part 1 and the guiding protection part 2 through the operation control parts 6 on the two sides of the longitudinal rod of the scaffold respectively, the operators rotate the control locking hand wheels 62 to wind the control connecting cables 4, the protection outer frame 11 and the protection inner frame 21 are subjected to angle adjustment through the guiding action of the guiding control parts 5, the angle of the protection outer frame 11 is adjusted to be horizontal, the angle of the protection inner frame 21 and the protection outer frame 11 are thirty degrees, the control locking hand wheels 62 are locked until the protection connecting net 3 is completely unfolded, the falling protection part 1, the guiding protection part 2 and the protection connecting net 3 form a triangular structure, the inclination direction of the guiding protection part 2 is the inner side of the scaffold, when foreign matters fall, the gravity is decomposed into vertical downward force and horizontal force through the inclined guiding protection part 2, the influence of the decomposition force in the horizontal direction can effectively prevent the foreign matter from rebounding to the outside of the falling protection component 1, thereby falling to the ground, when the foreign matter is sharp, firstly, the foreign matter punctures or passes the primary guide net 22, part of the gravity of the foreign matter is effectively offset through the primary guide net 22, the foreign matter falls in the falling prevention net 12 at the moment, the foreign matter can be effectively protected, the secondary falling is prevented, and the foreign matter can be effectively limited to the falling protection component 1 through the protection connecting net 3, the guide protection component 2 and the protection connecting net 3 are arranged between the foreign matter and the protection connecting net 3, thereby the condition of the secondary falling of the foreign matter is effectively avoided, and the protection effect on operators is effectively improved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a building site construction is with preventing high altitude falling injures protector by a crashing object, includes fall protection part (1), its characterized in that: the falling protection component (1) comprises a protection outer frame (11) hinged on a scaffold transverse rod and a falling prevention net (12) fixedly connected to the inner wall of the protection outer frame (11), one side of the inner wall of the protection outer frame (11) is hinged with a guide protection component (2), the guide protection component (2) comprises a protection inner frame (21) hinged on one side of the inner wall of the protection outer frame (11) and a primary guide net (22) fixedly connected to the inner wall of the protection inner frame (21), the bottom surface of the protection inner frame (21) is connected with one end, away from the hinged part of the upper end surface of the falling protection component (1), of the falling protection component through a protection connecting net (3), and one end, away from the protection connecting net (3), of the outer wall of the protection outer frame (11) is fixedly connected with a plurality of uniformly distributed fixed hinged buckles (13;
two symmetrically distributed fixed lugs (7) are fixedly connected to the upper end face of the protective outer frame (11) and one end, far away from the fixed hinge buckle (13), of the upper end face of the falling-prevention net (12), control connecting cables (4) are fixedly connected to the fixed lugs (7), the other ends of the control connecting cables (4) penetrate through guide control components (5), and operation control components (6) are arranged at the bottoms of the guide control components (5);
the number of the guide control components (5) is four, every two of the guide control components (5) are distributed on the longitudinal rods at two ends of the transverse rod of the scaffold, the number of the operation control components (6) is two, the operation control components (6) are respectively and fixedly connected to the bottoms of the two longitudinal rods, and every two of the four control connecting cables (4) are fixed on the two operation control components (6).
2. The high-altitude falling and smashing prevention protection device for construction of building sites, according to claim 1, is characterized in that: the direction control part (5) including fixed connection link (51) on vertical pole with fixed connection be in guide block (52) of link (51) one side, spread groove (521) have been seted up to guide block (52) up end, spread groove (521) internal rotation is connected with guide roller (53), sliding connection has on guide roller (53) control connection cable (4).
3. The high-altitude falling and smashing prevention protection device for construction of building sites, according to claim 2, is characterized in that: the two guide blocks (52) on each longitudinal bar are located on either side of the longitudinal bar.
4. The high-altitude falling and smashing prevention protection device for construction of building sites, according to claim 3, is characterized in that: operation control unit (6) are including fixed connection fixed block (61) on the longitudinal rod are connected with rotating the control dead lock hand wheel (62), four of fixed block (61) both sides the one end difference fixed connection of control connection cable (4) is four on the control dead lock hand wheel (62).
5. The high-altitude falling and smashing prevention protection device for construction of building sites, according to claim 4, is characterized in that: the outer walls of the control locking hand wheels (62) are rotatably connected with operating handles (63).
6. The high-altitude falling and smashing prevention protection device for construction of building sites, according to claim 4, is characterized in that: the control locking hand wheel (62) is positioned right below the guide block (52).
7. The high-altitude falling and smashing prevention protection device for construction of building sites, according to claim 1, is characterized in that: the aperture of the primary guide net (22) is larger than the apertures of the anti-falling net (12) and the protection connecting net (3).
8. The high-altitude falling and smashing prevention protection device for construction of building sites, according to claim 1, is characterized in that: the protective connecting net (3) is made of nylon.
9. The high-altitude falling and smashing prevention protection device for construction of building sites, according to claim 1, is characterized in that: when direction protection part (2) rotated upwards, fall protection part (1) with direction protection part (2) receive the effect of dragging of protection connecting net (3) back three forms triangle-shaped.
10. The high-altitude falling and smashing prevention protection device for construction of building sites, according to claim 1, is characterized in that: the inner diameter of the protective outer frame (11) is the same as the outer diameter of the protective inner frame (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910891702.6A CN110748141A (en) | 2019-09-20 | 2019-09-20 | Building site construction is with preventing high altitude falling injures protector by a crashing object |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910891702.6A CN110748141A (en) | 2019-09-20 | 2019-09-20 | Building site construction is with preventing high altitude falling injures protector by a crashing object |
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| Publication Number | Publication Date |
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| CN110748141A true CN110748141A (en) | 2020-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910891702.6A Pending CN110748141A (en) | 2019-09-20 | 2019-09-20 | Building site construction is with preventing high altitude falling injures protector by a crashing object |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894295A (en) * | 2020-07-29 | 2020-11-06 | 牛东辉 | Building site construction protection device for preventing high altitude from falling |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11412A (en) * | 1997-06-11 | 1999-01-06 | Kawaju Koji Kk | Structure for simplified safety net |
| CN202370265U (en) * | 2011-12-23 | 2012-08-08 | 中建七局第三建筑有限公司 | Movable type safe and flat screen |
| KR20140079005A (en) * | 2012-12-18 | 2014-06-26 | 최완석 | Apparatus for preventing dropping |
| CN108505756A (en) * | 2018-05-29 | 2018-09-07 | 安徽姆大陆科技发展有限公司 | A kind of industrial construction protective device |
| JP6498349B1 (en) * | 2018-11-29 | 2019-04-10 | 東阪工業株式会社 | Morning glory device for temporary scaffold |
-
2019
- 2019-09-20 CN CN201910891702.6A patent/CN110748141A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11412A (en) * | 1997-06-11 | 1999-01-06 | Kawaju Koji Kk | Structure for simplified safety net |
| CN202370265U (en) * | 2011-12-23 | 2012-08-08 | 中建七局第三建筑有限公司 | Movable type safe and flat screen |
| KR20140079005A (en) * | 2012-12-18 | 2014-06-26 | 최완석 | Apparatus for preventing dropping |
| CN108505756A (en) * | 2018-05-29 | 2018-09-07 | 安徽姆大陆科技发展有限公司 | A kind of industrial construction protective device |
| JP6498349B1 (en) * | 2018-11-29 | 2019-04-10 | 東阪工業株式会社 | Morning glory device for temporary scaffold |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894295A (en) * | 2020-07-29 | 2020-11-06 | 牛东辉 | Building site construction protection device for preventing high altitude from falling |
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Application publication date: 20200204 |