CN111706097A - Safety clamp for limb operation and use method thereof - Google Patents
Safety clamp for limb operation and use method thereof Download PDFInfo
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- CN111706097A CN111706097A CN202010368310.4A CN202010368310A CN111706097A CN 111706097 A CN111706097 A CN 111706097A CN 202010368310 A CN202010368310 A CN 202010368310A CN 111706097 A CN111706097 A CN 111706097A
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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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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/32—Safety or protective measures for persons during the construction of buildings
- E04G21/3204—Safety or protective measures for persons during the construction of buildings against falling down
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Abstract
The invention relates to the field of safety or protection measures for personnel in the building construction process, in particular to a safety clamp for limb operation and a using method thereof. The utility model provides a safe fixture for facing limit operation, includes top angle steel (1), characterized by: the steel plate roof structure is characterized by further comprising a tying angle steel (21), a fastening angle steel (22), a fastening nut (3), a front fastening bolt (41) and a rear fastening bolt (42), wherein two ends of the roof angle steel (1) are respectively fixed to the front part of a vertical plate of the tying angle steel (21) and the front part of a vertical plate of the fastening angle steel (22); the horizontal plate of the fastening angle steel (21) is provided with a fastening hole (211), and the vertical plate of the fastening angle steel (22) is sequentially provided with a front fastening hole (221) and a rear fastening hole (222). A use method of a safety clamp for limb operation is characterized in that: the method is implemented in sequence according to the following steps: firstly, tying; fastening; and thirdly, operation. The invention is convenient to use, safe and reliable.
Description
Technical Field
The invention relates to the field of safety or protection measures for personnel in the building construction process, in particular to a safety clamp for limb operation and a using method thereof.
Background
With the continuous improvement of the application of new technologies in the building industry, the construction technology of the aluminum alloy template is widely applied, and particularly, the form of replacing split bolts by the pull sheet type is further improved in the aspects of structural waterproofness and wall quality. Because no screw rod hole after the construction of pulling-on piece formula aluminum alloy template is accomplished, safety rope, safety belt do not have fixed point position, and the outer scaffold is whole demolishs after the main part construction is capped, and this produces very big potential safety hazard for facing side wall masonry, constructional column concrete placement, plastering, facing side wall whitewash, door and window installation etc..
Disclosure of Invention
The invention discloses a safety clamp for limb operation and a using method thereof, and aims to overcome the defects of the prior art and provide a construction safety device which is convenient to use, safe and reliable.
The invention achieves the purpose by the following technical scheme:
the utility model provides a safe fixture for facing limit operation, includes top angle steel, characterized by: also comprises a tying angle steel, a fastening nut, a front fastening bolt and a rear fastening bolt,
the top angle steel, the tying angle steel and the fastening angle steel are arranged on the same plane, vertical plates of the top angle steel, the tying angle steel and the fastening angle steel are arranged on the same side of the horizontal plates, the tying angle steel and the fastening angle steel are arranged in parallel in a manner that the vertical plates are opposite to each other, the top angle steel, the tying angle steel and the fastening angle steel are perpendicular to each other, and two ends of the top angle steel are respectively fixed to the front part of the vertical plate of the tying angle steel and the front part of the vertical plate of the fastening angle steel;
the horizontal plate of the fastening angle steel is provided with a fastening hole, the vertical plate of the fastening angle steel is sequentially provided with a front fastening hole and a rear fastening hole along the ridge line of the fastening angle steel, wherein the front fastening hole is close to the front end of the fastening angle steel, the rear fastening hole is close to the rear end of the fastening angle steel, the hole openings of the front fastening hole and the rear fastening hole are respectively fixed with a fastening nut, the fastening nuts are all arranged on the outer side surface of the vertical plate of the fastening angle steel, and the front fastening bolt and the rear fastening bolt are respectively screwed into the fastening nuts from the outer side of the vertical plate of the fastening angle steel and then are respectively screwed into the inner sides of the vertical plate of the fastening angle steel through the.
The safety fixture for the limb operation is characterized in that: the steel plate fixing device is characterized by further comprising a top steel bar, wherein two ends of the top steel bar are respectively fixed to the front portion of the vertical plate of the tying angle steel and the front portion of the vertical plate of the fastening angle steel, and the top steel bar is arranged right above the top angle steel flat plate and is parallel to the top angle steel flat plate.
The safety fixture for the limb operation is characterized in that:
two ends of the top angle steel are respectively fixed on the front part of the vertical plate of the tying angle steel and the front part of the vertical plate of the fastening angle steel in a full welding manner;
the central axes of the front fastening hole and the fastening nut arranged at the hole of the front fastening hole are overlapped, and the central axes of the rear fastening hole and the fastening nut arranged at the hole of the rear fastening hole are overlapped;
and two ends of the top steel bar are respectively fixed on the front part of the vertical plate of the tying angle steel and the front part of the vertical plate of the fastening angle steel in a full-welding manner.
The use method of the safety clamp for the limb operation is characterized in that: the method is implemented in sequence according to the following steps:
firstly, hanging: the bayonet of the safety belt is tied and hung on the tying and hanging hole of the tying and hanging angle steel horizontal plate;
fastening: clamping a door-shaped opening formed by the top angle steel, the tying angle steel and the fastening angle steel on the near-edge opening shear wall, sequentially screwing a front fastening bolt and a rear fastening bolt by using a torque wrench, and fixing the safety clamp on the near-edge opening shear wall;
thirdly, operation: the operator is tied at the other end of the safety belt to carry out operation, and the operation strictly follows one person and one fixture.
The use method of the safety clamp for the limb operation is characterized in that:
and secondly, the distance between the safety fixture and the floor slab is 1.2-1.5 m, the screwing torque of the front fastening bolt is not less than 25 N.m, and the screwing torque of the rear fastening bolt is not less than 15 N.m.
The invention solves the problem that the safety rope and the safety belt have no fixed point positions due to no screw holes after the construction of the pull-piece type aluminum alloy template is finished, provides a reliable and convenient solution, and has the following beneficial effects:
1. the material taking, the preparation, the carrying and the installation are convenient,
2. can be repeatedly used in a turnover way, saves the cost,
3. the safety belt is convenient for the construction workers near the edge to tie and hang, and the personal safety of the construction workers is ensured.
Drawings
Figure 1 is a front view of the present invention,
figure 2 is a top view of the present invention,
figure 3 is a front view of the fastening angle of the present invention,
figure 4 is an isometric view of the present invention,
fig. 5 is a graph showing the relationship between the torque T and the positive pressure F when the present invention is designed and calculated.
Detailed Description
The invention is further illustrated by the following specific examples.
Example 1
A safety clamp for limb operation comprises top angle steel 1, tying angle steel 21, fastening angle steel 22, fastening nuts 3, front fastening bolts 41 and rear fastening bolts 42, and as shown in figures 1-4, the safety clamp has the following specific structure:
the horizontal plates of the top angle steel 1, the tying angle steel 21 and the fastening angle steel 22 are all arranged on the same plane, the vertical plates of the top angle steel 1, the tying angle steel 21 and the fastening angle steel 22 are all arranged on the same side of the horizontal plates, the tying angle steel 21 and the fastening angle steel 22 are arranged in parallel in a manner that the vertical plates are opposite to each other, the top angle steel 1, the tying angle steel 21 and the fastening angle steel 22 are perpendicular to each other, and two ends of the top angle steel 1 are respectively fixed to the front part of the vertical plate of the tying angle steel 21 and the front part of the vertical plate;
the horizontal plate of the fastening angle steel 21 is provided with a fastening hole 211, the vertical plate of the fastening angle steel 22 is sequentially provided with a front fastening hole 221 and a rear fastening hole 222 along the ridge line of the fastening angle steel 22, wherein the front fastening hole 221 is close to the front end of the fastening angle steel 22, the rear fastening hole 222 is close to the rear end of the fastening angle steel 22, the orifices of the front fastening hole 221 and the rear fastening hole 222 are respectively fixed with a fastening nut 3, the fastening nuts 3 are all arranged on the outer side surface of the vertical plate of the fastening angle steel 22, and the front fastening bolt 41 and the rear fastening bolt 42 are respectively screwed into the fastening nut 3 from the outer side of the vertical plate of the fastening angle steel 22 and then are respectively screwed into the inner side of the vertical plate of the fastening angle steel 22 through the front fastening.
This embodiment still includes top reinforcing bar 5, and the both ends of top reinforcing bar 5 are fixed respectively in the anterior portion of the perpendicular board of tie angle steel 21 and the anterior portion of the perpendicular board of fastening angle steel 22, and top reinforcing bar 5 locates directly over the top angle steel 1 horizontal plate and parallel with top angle steel 1 horizontal plate.
In this embodiment:
two ends of the top angle steel 1 are respectively fixed on the front part of the vertical plate of the tying angle steel 21 and the front part of the vertical plate of the fastening angle steel 22 in a full-welding manner;
the holes of the front fastening hole 221 and the rear fastening hole 222 are respectively fixed with one fastening nut 3 by full welding, the central axes of the front fastening hole 221 and the fastening nut 3 arranged at the hole of the front fastening hole 221 are superposed with each other, and the central axes of the rear fastening hole 222 and the fastening nut 3 arranged at the hole of the rear fastening hole 222 are superposed with each other;
two ends of the top steel bar 5 are respectively fixed on the front part of the vertical plate of the tie angle steel 21 and the front part of the vertical plate of the fastening angle steel 22 by full welding.
When the method is used, the steps are implemented in sequence as follows:
firstly, hanging: the bayonet of the safety belt is tied and hung on the tying and hanging hole 211 of the horizontal plate of the tying and hanging angle steel 21;
fastening: clamping a door-shaped opening formed by the top angle steel 1, the tying angle steel 21 and the fastening angle steel 22 on the near-edge opening shear wall, then sequentially screwing a front fastening bolt 41 and a rear fastening bolt 42 by a torque wrench, and fixing the safety clamp on the near-edge opening shear wall;
the distance between the safety fixture and the floor slab is 1.2-1.5 m, the screwing moment of the front fastening bolt 41 is not less than 25 N.m, and the screwing moment of the rear fastening bolt 42 is not less than 15 N.m;
thirdly, operation: the operator is tied at the other end of the safety belt to carry out operation, and the operation strictly follows one person and one fixture.
The embodiment can be manufactured by using the surplus materials of construction sites such as angle steel, three-level steel and the like, and the required materials are as follows:
1. the top angle steel 1, the hanging angle steel 21 and the fastening angle steel 22 are all L63 multiplied by 6 angle steel made of Q235 material,
2. the pitch diameters of the fastening nut 3, the front fastening bolt 41 and the rear fastening bolt 42 are all 14mm,
3. the top steel bar 5 is HRB400 hot-rolled ribbed steel bar (old called three-level deformed steel bar) with the diameter of 18 mm.
The remarks in the preparation and use of the present embodiment are as follows:
1. angle steel and steel bar welding: an E43 welding rod is adopted for welding, so that the welding seam is full, flat and uniform, and the phenomena of air holes, slag inclusion, incomplete fusion, undercut and the like are avoided;
2. and (3) nut welding: the nut and the corresponding hole are concentric, the fastening bolt and the fastening nut are protected, and foreign matters are prevented from entering the thread to influence the fastening torque value of the fastening bolt;
3. raw materials used for raw material inspection are all national standard qualified products;
4. brushing antirust paint: the safety fixture is integrally coated with the antirust paint, so that potential safety hazards caused by long-time corrosion are prevented;
5, fastening: the fastening bolt must be fastened on the concrete surface and must not be fastened on the masonry wall, the mortar and the decorative surface layer;
6. fastening torque: the fastening bolt is fastened by a torque wrench, the fastening bolt and the fastening nut are checked before fastening, so that the torque value is prevented from being influenced by resistance, the torque of the fastening bolt 41 is 25 N.m, and the torque of the fastening bolt 42 is 15 N.m;
7. the safety fixture is used by one person and one fixture, and can not be used by a plurality of persons at the same time.
Mechanical test of safety fixture
1. Pull-out test of the fastening hole 211 for fastening a seat belt buckle:
the pulling test is carried out on the tying hole 211, when the pulling force value reaches 8.55kN, the bayonet of the safety belt deforms, and at the moment, the tying angle steel 21 only slightly deforms.
2. Weld drawing test:
when the tension value reaches 100.25kN, only the top angle steel 1, the tying angle steel 21 and the fastening angle steel 22 are slightly deformed, the welding positions are well combined, and the phenomena of cracking, welding failure and the like do not occur.
3. Pressure values generated when different torques were applied to the front fastening bolts 41 and the rear fastening bolts 42, respectively, were measured by pressure sensors, as shown in table 1:
table 1:
in table 1:
t1 is the moment applied to the front fastening bolt 41, in N · m,
t2 is the torque applied to the rear fastening bolt 42, in N · m,
f (T1) is the measured pressure value generated by the front fastening bolt 41, in kN,
f (T2) is the measured pressure value generated by the rear fastening bolt 42, in kN,
f (ttotal) is a pressure value in kN that the front fastening bolts 41 and the rear fastening bolts 42 jointly generate.
4. And (3) combining experimental data of the relation between the torque applied to the two fastening bolts and the pressure values generated by the two fastening bolts, performing pull-out tests on the two fastening bolts in different torque states by using the anchor rod pull-out instrument on site, and measuring the friction force between the safety clamp and the shear wall.
Second, design calculation of safety fixture
1. The design premise is as follows:
taking the horizontal tension P of the safety clamp as 1kN and the dynamic load coefficient lambda1Take 3.0, the coefficient of the polynomial2Taking out the mixture of 1.35 percent,
design value of tension N ═ lambda1·λ2·P＝3.0×1.35×1＝4.05kN，
Let f be the tension value to which a single fastening bolt is subjected, obtained from N ═ 2 f: and f is equal to N/2, 4.05/2 is approximately equal to 2.03 kN.
2. Destructive form of safety fixture:
(1) the strength of the fastening bolt is greater than that of the concrete, the concrete is crushed,
c30 concrete strength value: n is a radical ofconcrete＝30N/mm2×153mm2×2＝9180N≈9.2kN，
(2) The strength of the fastening bolt is achieved, the fastening bolt is damaged,
bolt strength value of Q235 with a pitch diameter of 14 mm:
Nbolt＝215N/mm2×153mm2×2＝65790N＝65.79kN。
3. calculating a tightening torque coefficient K value:
according to experiments, the relationship between the torque T and the positive pressure F is shown in fig. 5.
In FIG. 5, the unit of F is kN, the unit of T is N · m, and the following is obtained from FIG. 5:
when T is 10 N.m, F is 2.9kN,
when T is 15 N.m, F is 4.1kN,
when T is 20 N.m, F is 6.3kN,
when T is 25 N.m, F is 7.5kN,
when T is 30 N.m, F is 7.9kN,
k is taken from K1～K5I.e.:
the tightening torque coefficient K was 0.25.
4. Calculating the friction coefficient μ:
in field tests, the friction coefficient μ was calculated from experimental data for a positive tension N at which the safety clamp just slipped when the torque T1 of the fastening bolt 41 was 30N · M and the torque T2 of the fastening bolt 2 was 15N · M, and F (tot) was 6.4kN in table 1.
(1) From the first set of experimental data: when the positive tension N is equal to 5.7kN, the safety fixture just slides, and the friction coefficient is calculated
(2) From the second set of experimental data: when the positive tension N is 5kN, the safety fixture just slides, and the friction coefficient mu is calculated2：
(3) From the third set of experimental data: when the positive tension N is equal to 6kN, the safety fixture just slides, and the friction coefficient mu is calculated3：
(4) Coefficient of friction mu is taken as mu1～μ3I.e.:
5. determining the torque of the fastening bolt:
it is known that: n4.05 kN, f N/2 2.03kN, μ 0.44,
(1) from F ═ μ F, the solution yields: f/mu 2.03kN/0.44 kN 4.6kN,
(2) from TCKFd, solving: t isC0.25 × 4.6kN × 16 mm-16.1 N.m, wherein d is the intermediate diameter of the fastening bolt,
at this time TCThe value 16.1N · m is a critical value, and a safety factor σ of 1.35, T σ · T, is taken for safetyC＝1.35×16.1N·m≈21.74N·m。
6. And (4) calculating a conclusion:
the torque of the fastening bolt 41 is 25N · M, and the torque of the fastening bolt 42 is 15N · M.
Through experiments, when the positive tension N is 4.5kN, the safety clamp just slides, and the designed tension value is 4.05kN and is less than 4.5kN, which indicates that the safety clamp is safe. Moreover, the total pressure value of the two fastening bolts at this time is 6.3kN, which is smaller than the strength of the concrete and the strength of the fastening bolts, indicating that the safety clamp is safe.
Claims (5)
1. The utility model provides a safe fixture for facing limit operation, includes top angle steel (1), characterized by: also comprises a tying angle steel (21), a fastening angle steel (22), a fastening nut (3), a front fastening bolt (41) and a rear fastening bolt (42),
the horizontal plates of the top angle steel (1), the tying angle steel (21) and the fastening angle steel (22) are all arranged on the same plane, the vertical plates of the top angle steel (1), the tying angle steel (21) and the fastening angle steel (22) are arranged on the same side of the horizontal plates in parallel in a way that the vertical plates are opposite to each other, the top angle steel (1), the tying angle steel (21) and the fastening angle steel (22) are perpendicular to each other, and two ends of the top angle steel (1) are respectively fixed to the front part of the vertical plate of the tying angle steel (21) and the front part of the vertical plate of the fastening angle steel (22);
the horizontal plate of the fastening angle steel (21) is provided with a fastening hole (211), a vertical plate of the fastening angle steel (22) is sequentially provided with a front fastening hole (221) and a rear fastening hole (222) along the ridge line of the fastening angle steel (22), wherein the front fastening hole (221) is close to the front end of the fastening angle steel (22), the rear fastening hole (222) is close to the rear end of the fastening angle steel (22), the orifices of the front fastening hole (221) and the rear fastening hole (222) are respectively fixed with one fastening nut (3), the fastening nuts (3) are all arranged on the outer side face of the vertical plate of the fastening angle steel (22), and the front fastening bolt (41) and the rear fastening bolt (42) are respectively screwed into the fastening nut (3) from the outer side of the vertical plate of the fastening angle steel (22) and then are respectively screwed into the inner side of the vertical plate of the fastening hole (22) through the front fastening hole (221).
2. A safety clip for use in rimming operations as defined in claim 1, wherein: the steel plate fixing device is characterized by further comprising top steel bars (5), wherein the two ends of each top steel bar (5) are respectively fixed to the front portion of the vertical plate of the tying angle steel (21) and the front portion of the vertical plate of the fastening angle steel (22), and the top steel bars (5) are arranged right above the horizontal plate of the top angle steel (1) and are parallel to the horizontal plate of the top angle steel (1).
3. A safety clip for use in rimming operations as defined in claim 2, wherein:
two ends of the top angle steel (1) are respectively fixed on the front part of the vertical plate of the tying angle steel (21) and the front part of the vertical plate of the fastening angle steel (22) in a full-welding manner;
the holes of the front fastening hole (221) and the rear fastening hole (222) are respectively fixed with one fastening nut (3) in a full-welding mode, the central axes of the front fastening hole (221) and the fastening nut (3) arranged at the hole of the front fastening hole (221) are overlapped, and the central axes of the rear fastening hole (222) and the fastening nut (3) arranged at the hole of the rear fastening hole (222) are overlapped;
two ends of the top steel bar (5) are respectively fixed on the front part of the vertical plate of the tying angle steel (21) and the front part of the vertical plate of the fastening angle steel (22) in a full welding way.
4. A method of using a safety clip for use in an edgewise operation as claimed in any one of claims 1 to 3, characterised by: the method is implemented in sequence according to the following steps:
firstly, hanging: the bayonet of the safety belt is tied and hung on a tying and hanging hole (211) of a horizontal plate of tying and hanging angle steel (21);
fastening: clamping a door-shaped opening formed by the top angle steel (1), the tying angle steel (21) and the fastening angle steel (22) on the near-edge opening shear wall, then sequentially screwing a front fastening bolt (41) and a rear fastening bolt (42) by a torque wrench, and fixing the safety clamp on the near-edge opening shear wall;
thirdly, operation: the operator is tethered to the other end of the harness to perform the work.
5. The method of using a safety clip for bordering operations as defined in claim 4, wherein:
and secondly, the distance between the safety fixture and the floor slab is 1.2-1.5 m, the screwing moment of the front fastening bolt (41) is not less than 25 N.m, and the screwing moment of the rear fastening bolt (42) is not less than 15 N.m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010368310.4A CN111706097A (en) | 2020-04-30 | 2020-04-30 | Safety clamp for limb operation and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010368310.4A CN111706097A (en) | 2020-04-30 | 2020-04-30 | Safety clamp for limb operation and use method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111706097A true CN111706097A (en) | 2020-09-25 |
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ID=72536850
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010368310.4A Pending CN111706097A (en) | 2020-04-30 | 2020-04-30 | Safety clamp for limb operation and use method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN111706097A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115100827A (en) * | 2022-05-23 | 2022-09-23 | 中国十七冶集团有限公司 | Intelligent alarm device for fastening safety belt in limb operation and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11236767A (en) * | 1998-02-20 | 1999-08-31 | Taisei Corp | Easy and simple clamp |
| CN204850514U (en) * | 2015-07-23 | 2015-12-09 | 中国建筑第八工程局有限公司 | That reserves entrance to a cave faces limit protector |
| CN105781133A (en) * | 2016-04-25 | 2016-07-20 | 中国建筑第六工程局有限公司 | Simple edge protecting system and construction method thereof |
| CN206859722U (en) * | 2017-06-26 | 2018-01-09 | 中建三局集团有限公司 | A kind of moving type security band stationary fixture |
| CN208981811U (en) * | 2018-06-27 | 2019-06-14 | 中建三局安装工程有限公司 | One kind facing side operation safety belt stationary fixture for building |
| CN209760855U (en) * | 2019-03-12 | 2019-12-10 | 济南市工程质量与安全生产监督站 | Safety belt fastening and hanging device for balcony part construction |
-
2020
- 2020-04-30 CN CN202010368310.4A patent/CN111706097A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11236767A (en) * | 1998-02-20 | 1999-08-31 | Taisei Corp | Easy and simple clamp |
| CN204850514U (en) * | 2015-07-23 | 2015-12-09 | 中国建筑第八工程局有限公司 | That reserves entrance to a cave faces limit protector |
| CN105781133A (en) * | 2016-04-25 | 2016-07-20 | 中国建筑第六工程局有限公司 | Simple edge protecting system and construction method thereof |
| CN206859722U (en) * | 2017-06-26 | 2018-01-09 | 中建三局集团有限公司 | A kind of moving type security band stationary fixture |
| CN208981811U (en) * | 2018-06-27 | 2019-06-14 | 中建三局安装工程有限公司 | One kind facing side operation safety belt stationary fixture for building |
| CN209760855U (en) * | 2019-03-12 | 2019-12-10 | 济南市工程质量与安全生产监督站 | Safety belt fastening and hanging device for balcony part construction |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115100827A (en) * | 2022-05-23 | 2022-09-23 | 中国十七冶集团有限公司 | Intelligent alarm device for fastening safety belt in limb operation and use method thereof |
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Application publication date: 20200925 |