CN115110750A - Universal wall connecting rod of building scaffold - Google Patents
Universal wall connecting rod of building scaffold Download PDFInfo
- Publication number
- CN115110750A CN115110750A CN202210854990.XA CN202210854990A CN115110750A CN 115110750 A CN115110750 A CN 115110750A CN 202210854990 A CN202210854990 A CN 202210854990A CN 115110750 A CN115110750 A CN 115110750A
- Authority
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- Prior art keywords
- pipe
- embedded
- telescopic
- telescopic screw
- plate
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 230000037431 insertion Effects 0.000 claims description 34
- 238000003780 insertion Methods 0.000 claims description 34
- 230000003014 reinforcing effect Effects 0.000 claims description 16
- 230000007547 defect Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Images
Classifications
-
- 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
- E04G5/04—Means for fastening, supporting, or bracing scaffolds on or against building constructions
- E04G5/046—Means for fastening, supporting, or bracing scaffolds on or against building constructions for fastening scaffoldings on walls
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The invention relates to a universal wall connecting rod of a building scaffold, which comprises a wall connecting pipe, a telescopic screw pipe adjusting part, a tensioning screw rod and an embedded part, wherein the wall connecting pipe comprises: the telescopic screw pipe is a circular pipe, and telescopic screw pipe threads are arranged on the outer pipe wall of the telescopic screw pipe; the flexible solenoid adjusting part be equipped with a section solenoid, the built-in fitting, include: the embedded long nut, the embedded U-shaped plate, the embedded strip-shaped plate and the embedded positioning plate can rotate 360 degrees and swing, the defect of embedded deviation can be overcome, the installation is easier, the working time is greatly saved, the working efficiency is improved, the embedded long nut and the embedded U-shaped plate can be tightly matched with a steel pipe of a scaffold more firmly, the whole connecting piece can be conveniently pulled tight, and the connection cannot shake. The embedded part is prevented from falling off, the embedded strength is further improved, and the safety performance is greatly improved.
Description
Technical Field
The invention relates to a scaffold, in particular to a universal wall connecting rod of a building scaffold. Background
The universal wall connecting rod of the building scaffold is used for tensioning and fixing the scaffold and a wall, a standard matching part is not available at present, the scaffold is mostly inserted into the wall through a cross rod, holes are required to be repaired after construction, not only are working hours consumed, but also the hidden danger of water leakage exists. At present, the existing embedded parts are connected by adopting embedded parts, and the existing embedded parts have the defect of deviation position due to the fact that the embedded parts are embedded in the wall, so that the connection with the scaffold steel pipe cannot be accurately positioned, the installation is labor-consuming and time-consuming, and the working efficiency is low. Because the embedded part is small, the embedded part is not firm enough, and the potential safety hazard is easily caused. Because the connecting rod that the built-in fitting is connected can not the regulation in arbitrary position, connect still to have the inaccurate problem of counterpointing, connect and take time and labouriously, influence work efficiency.
Disclosure of Invention
The invention aims to solve the problems and provides a universal wall connecting rod of a building scaffold.
The technical scheme adopted by the invention is as follows: the utility model provides a universal wall pole that links of building scaffold, includes even wall pipe, flexible solenoid adjusting part, tensioning screw and built-in fitting, even wall pipe include: the pull pipe is a circular pipe, the rear end of the pull pipe is sleeved with the telescopic screw pipe, the rear end of the pull pipe is provided with the telescopic screw pipe inserting sleeve, and the inner diameter of the telescopic screw pipe inserting sleeve is larger than that of the pull pipe; the front end of the pull tube is fixedly connected with a pull tube U-shaped connecting plate, and two jacks are arranged on the pull tube U-shaped connecting plate; the locking insertion pieces are wedge-shaped, when the locking insertion pieces are used, the U-shaped openings of the U-shaped connecting plates of the stay tubes are inserted into the steel pipes on the scaffold, and the locking insertion pieces are inserted into the two insertion holes and locked on the steel pipes on the scaffold; the telescopic screw pipe is a round pipe, telescopic screw pipe threads are arranged on the pipe wall on the outer side of the telescopic screw pipe, the outer diameter of the telescopic screw pipe is smaller than the pipe hole diameter of the pull pipe, the telescopic screw pipe is inserted into the pull pipe and can rotate 360 degrees along the axis, a telescopic screw pipe necking is arranged at the rear end of the telescopic screw pipe, a necking is arranged on the pipe wall in front of the telescopic screw pipe necking, and a screw rod connector movable cavity of a tensioning screw rod is formed in the pipe cavity between the telescopic screw pipe necking and the necking; the adjusting part of the telescopic screw pipe is provided with a section of screw pipe, the inner side of the screw pipe is provided with an adjusting part thread connected with the telescopic screw pipe thread, and the outer side of the telescopic screw pipe adjusting part is provided with an adjusting part handle; the front end of the tensioning screw is provided with a screw connector, the front side of the tensioning screw is provided with a manual handle, and the screw connector is arranged in a movable cavity of the screw connector, can rotate 360 degrees along the axis of the tensioning screw and can swing in the movable cavity; the built-in fitting, include: the embedded long nut, the embedded U-shaped plate, the embedded strip-shaped plate and the embedded positioning plate are embedded in advance, the rear end of the embedded long nut is welded with the front end of the embedded U-shaped plate, the rear end of the embedded U-shaped plate is welded with the embedded strip-shaped plate, the embedded U-shaped plate and the embedded long nut form a T shape after being welded, a rectangular inserting reinforcing hole is formed in the U-shaped plate after the embedded U-shaped plate and the embedded strip-shaped plate are welded, an embedded part is embedded in a concrete wall during use, and inserting reinforcing steel bars are inserted in the inserting reinforcing hole for reinforcing; the pre-buried locating plate is long-strip-shaped, two locating holes with the distance larger than 1 cm are arranged on the pre-buried locating plate, and nails are inserted into the locating holes for locating when the pre-buried locating plate is pre-buried.
Furthermore, one side of the locking insertion sheet contacting with the connected steel pipe is provided with 1-4 concave arc locking grooves.
Furthermore, the inserting end of the locking insertion piece is provided with a convex block, and the height of the convex block is larger than the first jack of the locking insertion piece and smaller than the second jack of the locking insertion piece.
Furthermore, two reinforcing plates are arranged on the upper surface and the lower surface of the rear end of the pull tube U-shaped connecting plate, and a concave arc positioning groove is formed in one end, facing the connecting steel tube, of each reinforcing plate.
The invention has the beneficial effects that: the invention is provided with the telescopic pipe, the telescopic screw pipe adjusting part and the tensioning screw rod, the telescopic pipe is inserted in the pull pipe and can rotate 360 degrees, the front end of the tensioning screw rod is provided with the screw rod connector, and the screw rod connector is arranged in the screw rod connector movable cavity and can rotate 360 degrees and swing, so that universal steering connection can be realized, the defect of pre-buried deviation can be overcome, the installation is easier, the working time is greatly saved, and the working efficiency is improved. Due to the fact that the locking insertion piece is arranged, the insertion piece is provided with the concave arc locking groove, and the locking insertion piece can be tightly matched with a steel pipe of a scaffold. Due to the tensioning screw rod, the whole connecting piece can be conveniently tensioned, and the connection cannot shake. Because the splicing reinforcing holes are formed, the reinforcing steel bars longer than the embedded parts can penetrate into the embedded parts, the embedded parts are prevented from falling off, the embedded strength is further improved, and the safety performance is greatly improved. Because the two positioning holes with the distance larger than 1 centimeter are arranged on the embedded positioning plate, the embedded part can be prevented from being displaced when the concrete is poured, and the rotation displacement of the embedded part can be better prevented by using the two holes for positioning. The reserved part does not need to be detached, the wall connecting rod is convenient to detach, cracks can not occur on the wall surface after the wall connecting rod is detached, water leakage can not occur, and the wall surface can not be damaged.
Drawings
Fig. 1 is a perspective view of one embodiment of the present invention.
Fig. 2 is an exploded perspective view of the main components of fig. 1.
Fig. 3 is a perspective view of fig. 2 from another angle.
Fig. 4 is a perspective view of the internal structure of fig. 1.
Fig. 5 is an enlarged schematic view at a of fig. 4.
Fig. 6 is a perspective view of the embedment, further exploded.
Fig. 7 is a perspective view of the pull tube U-shaped connecting plate further exploded.
Detailed Description
As shown in fig. 1 to 5, the present invention includes: the wall connecting pipe comprises a wall connecting pipe 1, a telescopic screw pipe 2, a telescopic screw pipe adjusting part 5, a tensioning screw rod 3 and an embedded part 4. The wall connecting pipe 1 comprises: the pull tube 11, pull tube U type connecting plate 12, locking inserted sheet 13 and flexible solenoid plug 14, the pull tube be the pipe, the pull tube rear end cup joints with flexible solenoid 2. The pull tube, the pull tube U-shaped connecting plate and the nut of the telescopic tube positioning screw are welded into a whole. The pipe hole of the sleeve-joint, i.e. the pull pipe, is sleeved outside the extension pipe and corresponds to the insertion connection. The rear end of the pull tube is provided with a telescopic solenoid insertion sleeve 14, the inner diameter of the telescopic solenoid insertion sleeve is larger than that of the pull tube, and the telescopic solenoid adjusting piece 5 is arranged in the telescopic solenoid insertion sleeve 14 during use, so that the adjustment is more stable. The front end of the pull tube is fixedly connected with a pull tube U-shaped connecting plate, and two jacks are arranged on the pull tube U-shaped connecting plate; locking inserted sheet 13 is the wedge, and the U type mouth of trombone slide U type connecting plate is pegged graft with the steel pipe on the scaffold during use, and locking inserted sheet 13 pegs graft and locks on the steel pipe on the scaffold with two jacks. As shown in fig. 3, 4 and 5, the telescopic coil 2 is a circular tube, the outer tube wall of the telescopic coil is provided with telescopic coil threads 213, the outer diameter of the telescopic coil is smaller than the tube hole diameter of the pull tube 11, and the telescopic coil is inserted into the pull tube and can rotate 360 degrees along the axis. The rear end of flexible screwed pipe is equipped with flexible screwed pipe throat 211, be equipped with necking down 212 on the pipe wall in the place ahead of flexible screwed pipe throat, constitute tension screw's screw connector activity chamber 22 in the pipe cavity between flexible screwed pipe throat and the necking down, tension screw 3's front end is equipped with screw connector 32, the cavity in activity chamber is greater than the screw connector, screw connector can be including arbitrary angular rotation and rock like this, the position of being more convenient for adjustment connection, even the pre-buried deviation that has of built-in fitting also can conveniently connect. The front side of the tensioning screw rod is provided with a manual handle 31, the screw rod connector is arranged in the screw rod connector movable cavity 22 and can rotate 360 degrees and swing, the telescopic pipe necking part clamps the screw rod connector to prevent the screw rod connector from being separated, so that the safety effect is achieved, and meanwhile, the screw rod connector is prevented from falling off and losing. The neck limits the range of the screw connector moving towards the front end. The telescopic screw pipe adjusting piece 5 is provided with a section of screw pipe 51, the inner side of the screw pipe is provided with an adjusting piece thread 511 in threaded connection with the telescopic screw pipe, and the outer side of the telescopic screw pipe adjusting piece is provided with an adjusting piece handle 52. The front end of the tensioning screw rod 3 is provided with a screw rod connector 32, the front side of the tensioning screw rod is provided with a manual handle 31, the screw rod connector is arranged in a screw rod connector movable cavity 22 and can rotate 360 degrees along the axis of the tensioning screw rod and swing and move in the movable cavity, the screw rod connector is clamped by the necking of the telescopic screw tube to be prevented from being separated, and the necking limits the moving range of the screw rod connector.
As shown in fig. 6, the embedded part 4 includes: the embedded long nut 41, the embedded U-shaped plate 42, the embedded strip-shaped plate 43 and the embedded positioning plate 44 are embedded, the rear end of the embedded long nut is welded with the front end of the embedded U-shaped plate, the rear end of the embedded U-shaped plate is welded with the embedded strip-shaped plate, the embedded U-shaped plate and the embedded long nut form a T shape after being welded, a rectangular inserting reinforcing hole 421 is formed in the U-shaped plate after the embedded U-shaped plate and the embedded strip-shaped plate are welded, the embedded part is embedded in a concrete wall during use, and reinforcing bars are inserted into the inserting reinforcing hole for reinforcement; the pre-buried positioning plate 44 is in a long strip shape, two positioning holes 441 with the distance larger than 1 cm are arranged on the pre-buried positioning plate, and nails are inserted into the positioning holes for positioning during pre-burying.
As shown in fig. 7, the U-shaped connection plate 121 of the pull tube is provided with two insertion holes, an insertion hole 1211 and an insertion hole 1212, the insertion end of the locking insertion piece 13 is provided with a projection 132, the height of the projection is greater than that of the insertion hole 1211 of the locking insertion piece and smaller than that of the insertion hole 1212 of the locking insertion piece, that is, the height of the hole of the insertion hole is smaller than that of the insertion hole 1212, so that the projection of the locking insertion piece is blocked by the insertion hole 1212 and cannot fall off. Locking inserted sheet 13 one side is wide, and one side is narrow to constitute the wedge, and the U type mouth of trombone slide U type connecting plate is pegged graft with the steel pipe on the scaffold during use, and locking inserted sheet 13 pegs graft with two jacks and locks the steel pipe on the scaffold, and it is tighter to insert more with strikeing perpendicularly and getting into, connects very firmly. One side of the locking insertion sheet contacting with the connected steel pipe is provided with 1-4 concave arc locking grooves 131. Two reinforcing plates 122 are arranged on the upper and lower surfaces of the rear end of the pull tube U-shaped connecting plate 12, and one end of each reinforcing plate, which faces the connecting steel tube, is provided with a concave arc positioning groove 1221.
In the description of the present invention, it should be noted that the terms "front", "back", "upper", "lower", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Claims (4)
1. The utility model provides a universal wall pole that links of building scaffold frame which characterized in that: comprises a wall connecting pipe (1), a telescopic screw pipe (2), a telescopic screw pipe adjusting part (5), a tensioning screw rod (3) and an embedded part (4),
the wall connecting pipe (1) comprises: the pull pipe is a round pipe, the rear end of the pull pipe is sleeved with the telescopic screw pipe (2), the rear end of the pull pipe is provided with the telescopic screw pipe inserting sleeve, and the inner diameter of the telescopic screw pipe inserting sleeve is larger than that of the pull pipe; the front end of the pull tube is fixedly connected with a pull tube U-shaped connecting plate, and two jacks are arranged on the pull tube U-shaped connecting plate; the locking insertion pieces are wedge-shaped, when the locking insertion pieces are used, the U-shaped openings of the U-shaped connecting plates of the stay tubes are inserted into the steel pipes on the scaffold, and the locking insertion pieces are inserted into the two insertion holes and locked on the steel pipes on the scaffold;
the telescopic screw pipe (2) is a round pipe, telescopic screw pipe threads (213) are arranged on the pipe wall on the outer side of the telescopic screw pipe, the outer diameter of the telescopic screw pipe is smaller than the pipe hole diameter of the pull pipe (11), the telescopic screw pipe is inserted into the pull pipe and can rotate 360 degrees along the axis, a telescopic screw pipe necking (211) is arranged at the rear end of the telescopic screw pipe, a necking (212) is arranged on the pipe wall in front of the telescopic screw pipe necking, and a screw rod connector movable cavity (22) of a tensioning screw rod is formed in the pipe cavity between the telescopic screw pipe necking and the necking;
the telescopic solenoid adjusting piece (5) is provided with a section of solenoid (51), the inner side of the solenoid is provided with an adjusting piece thread (511) in threaded connection with the telescopic solenoid, and the outer side of the telescopic solenoid adjusting piece is provided with an adjusting piece handle (52);
the front end of the tensioning screw rod (3) is provided with a screw rod connector (32), the front side of the tensioning screw rod is provided with a manual handle (31), and the screw rod connector is arranged in a screw rod connector movable cavity (22) and can rotate 360 degrees along the axis of the tensioning screw rod and can swing in the movable cavity;
the embedded part (4) comprises: the embedded steel plate comprises an embedded long nut (41), an embedded U-shaped plate (42), an embedded strip-shaped plate (43) and an embedded positioning plate (44), wherein the rear end of the embedded long nut is welded with the front end of the embedded U-shaped plate, the rear end of the embedded U-shaped plate is welded with the embedded strip-shaped plate, the embedded U-shaped plate and the embedded long nut form a T shape after being welded, a rectangular inserting reinforcing hole (421) is formed in the U-shaped plate after the embedded U-shaped plate and the embedded strip-shaped plate are welded, the embedded part is embedded in a concrete wall during use, and a steel bar is inserted into the inserting reinforcing hole for reinforcing; the embedded positioning plate is long-strip-shaped, two positioning holes with the distance larger than 1 cm are arranged on the embedded positioning plate, and nails are inserted into the positioning holes for positioning during embedding.
2. The universal wall connecting rod for the building scaffold as claimed in claim 1, wherein: one side of the locking insertion sheet (13) contacting with the connected steel pipe is provided with 1-4 concave arc locking grooves (131).
3. The universal wall connecting rod for the building scaffold as claimed in claim 1, wherein: the inserting end of the locking inserting sheet (13) is provided with a convex block (132), the height of the convex block is larger than that of a first inserting hole (1211) of the locking inserting sheet and smaller than that of a second inserting hole (1212) of the locking inserting sheet.
4. The universal wall connecting rod for the building scaffold as claimed in claim 1, wherein: two reinforcing plates (122) are arranged on the upper surface and the lower surface of the rear end of the pull tube U-shaped connecting plate (12), and a concave arc positioning groove (1221) is arranged at one end of each reinforcing plate, which faces to the connecting steel tube.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2022103480310 | 2022-04-03 | ||
| CN202210348031 | 2022-04-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115110750A true CN115110750A (en) | 2022-09-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210854990.XA Pending CN115110750A (en) | 2022-04-03 | 2022-07-19 | Universal wall connecting rod of building scaffold |
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| Country | Link |
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| CN (1) | CN115110750A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116163509A (en) * | 2023-04-23 | 2023-05-26 | 徐州鼎博混凝土制品有限公司 | Pre-buried ware of concrete building scaffold frame |
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| CN212001803U (en) * | 2019-10-12 | 2020-11-24 | 中民筑友科技产业有限公司 | Supporting component of prefabricated external wall panel and connection structure of prefabricated external wall panel |
| CN212001802U (en) * | 2019-10-12 | 2020-11-24 | 中民筑友科技产业有限公司 | Spacing subassembly and connection structure of prefabricated wallboard and roof beam |
| CN212406085U (en) * | 2020-05-21 | 2021-01-26 | 中国建筑第四工程局有限公司 | Connecting piece for fixing steel pipe scaffold |
| CN112392144A (en) * | 2020-11-27 | 2021-02-23 | 中建装配式建筑设计研究院有限公司 | Connecting node of assembled concrete external wall panel, mounting method of connecting node and building |
| CN212927000U (en) * | 2020-07-27 | 2021-04-09 | 中国建筑一局(集团)有限公司 | Tool type scaffold wall connecting piece for civil engineering |
| CN214658718U (en) * | 2021-05-15 | 2021-11-09 | 中交一公局集团有限公司 | Scaffold wall connecting piece and scaffold system |
| CN215978402U (en) * | 2021-07-30 | 2022-03-08 | 南通建清建设工程有限公司 | Scaffold wall connecting fastener |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU947322A1 (en) * | 1981-02-17 | 1982-07-30 | Всесоюзный Государственный Ордена Трудового Красного Знамени Головной Проектно-Изыскательский И Научно-Исследовательский Институт По Переработке И Распределению Вод Северных И Сибирских Рек "Союзгипроводхоз" | Girder to column butt joint |
| DE9417628U1 (en) * | 1994-11-03 | 1995-08-17 | Günter Rux GmbH, 58135 Hagen | Scaffolding tester |
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| CN203271106U (en) * | 2013-05-31 | 2013-11-06 | 中国建筑第六工程局有限公司 | Profile steel anchoring device of cantilever scaffold |
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| CN206707023U (en) * | 2017-04-10 | 2017-12-05 | 卢平志 | Anchor plate for building installation |
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| CN208633489U (en) * | 2018-07-03 | 2019-03-22 | 广东奇正科技有限公司 | A kind of bolt-type connection snap close piece |
| CN210622287U (en) * | 2019-05-15 | 2020-05-26 | 台山市东扩钢构有限公司 | Scaffold connecting assembly and scaffold |
| CN212001803U (en) * | 2019-10-12 | 2020-11-24 | 中民筑友科技产业有限公司 | Supporting component of prefabricated external wall panel and connection structure of prefabricated external wall panel |
| CN212001802U (en) * | 2019-10-12 | 2020-11-24 | 中民筑友科技产业有限公司 | Spacing subassembly and connection structure of prefabricated wallboard and roof beam |
| CN212406085U (en) * | 2020-05-21 | 2021-01-26 | 中国建筑第四工程局有限公司 | Connecting piece for fixing steel pipe scaffold |
| CN111764634A (en) * | 2020-06-29 | 2020-10-13 | 中天华南建设投资集团有限公司 | Novel scaffold wall connecting piece and using method |
| CN111794492A (en) * | 2020-07-18 | 2020-10-20 | 福建大华建设工程股份有限公司 | Wall connecting piece structure of scaffold and construction method thereof |
| CN212927000U (en) * | 2020-07-27 | 2021-04-09 | 中国建筑一局(集团)有限公司 | Tool type scaffold wall connecting piece for civil engineering |
| CN112392144A (en) * | 2020-11-27 | 2021-02-23 | 中建装配式建筑设计研究院有限公司 | Connecting node of assembled concrete external wall panel, mounting method of connecting node and building |
| CN214658718U (en) * | 2021-05-15 | 2021-11-09 | 中交一公局集团有限公司 | Scaffold wall connecting piece and scaffold system |
| CN215978402U (en) * | 2021-07-30 | 2022-03-08 | 南通建清建设工程有限公司 | Scaffold wall connecting fastener |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116163509A (en) * | 2023-04-23 | 2023-05-26 | 徐州鼎博混凝土制品有限公司 | Pre-buried ware of concrete building scaffold frame |
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