CN206888540U - The servicing unit of main couple is installed during construction truss-like roof - Google Patents
The servicing unit of main couple is installed during construction truss-like roof Download PDFInfo
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- CN206888540U CN206888540U CN201720686394.XU CN201720686394U CN206888540U CN 206888540 U CN206888540 U CN 206888540U CN 201720686394 U CN201720686394 U CN 201720686394U CN 206888540 U CN206888540 U CN 206888540U
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Abstract
The utility model discloses during a kind of construction large-span truss formula steel-structure roof for installing the servicing unit of main couple, it includes four groups of manipulators for being used to extract backing plate (14), and every group of manipulator includes fixed plate (15), vertical cylinder (16), rotary cylinder (17) and lateral cylinder (18)；Fixed plate (15) is detachably connected on a supporting leg (12.1) of main couple (12), the cylinder body of vertical cylinder (16) is fixed in fixed plate (15), the fixed part of the piston rod and rotary cylinder (17) of vertical cylinder (16) is fixed, the cylinder body of the rotating part of rotary cylinder (17) and lateral cylinder (18) is fixed, and the fixture for clamping backing plate (14) is fixed with the piston rod of lateral cylinder (18).The servicing unit can realize that backing plate (14) extracts automatically.
Description
Technical field
The construction technology of the large-span truss formula steel-structure roof in field of civil engineering is the utility model is related to, specifically
For installing the servicing unit of main couple when being a kind of construction large-span truss formula steel-structure roof.
Background technology
A kind of large span (referring generally to span more than 30m) truss-like steel is often used at the top of large stadium such as gymnasium
Construction roof, construct the roof when, very crucial step is fixed on the installation of large span main couple.It is above-mentioned to install
Journey can use the pre-buried steel corbel fixed on two concrete side wall inner surfaces of venue, and its detailed process is, first at two
It is each on the steel corbel of side wall to fix an interim i-beam track, then put two dollies on every track, and main couple
Corner is provided with four supporting legs, and four supporting legs of the corner of a main couple are rested on four dollies of two tracks respectively,
I.e. the left front supporting leg of main couple and left back supporting leg are rested on two dollies of left rail, and right anterior branch leg and right rear support leg rest on the right side
On two dollies of siding track；Four dollies are driven to advance again so that the corner of the main couple reaches corresponding four steel corbels
Top；Worker is sling main couple from corner with chain block on hanging basket at station, then four dollies that retract, and is dismantled positioned at main truss
Track section below frame, it is corresponding then make it that four supporting legs of main couple are respectively rested on chain block decentralization main couple
On four steel corbels, finally each supporting leg is fixed with steel corbel；This completes the installation of a main couple to fix, and is left
Other main couples also carry out installation fixation in the manner described above.
First content that the application is related to is the problem of transferring main couple with chain block, specifically, transfers main truss
Frame makes during main couple supporting leg is shelved on steel corbel, to cause main couple and supporting leg fast to prevent chain block from releasing suddenly
Suddenly lower damage steel corbel is pounded, therefore after slinging main couple, before track of dismantling, worker station is on steel corbel to each steel corbel
Polylith backing plate is laid between each supporting leg of main couple as temporary support, top layer backing plate and dolly either flush, with supporting leg
Spacing is no more than 1cm, then refunds dolly and the orbital segment below main couple of dismantling, and then block-by-block extracts backing plate out, often takes out
Go out the height that one piece of backing plate chain block transfers supporting leg on one backing plate, be further continued for taking out next piece of backing plate and then and decentralization one
Backing plate height, it is reciprocal with this, and supporting leg remains small spacing with the superiors' backing plate in main couple decentralization process, until whole
Backing plate is extracted, and finally directly rests on main couple supporting leg on steel corbel.Laying backing plate simultaneously transfers the good of main couple when taking out
Place is so that the supporting leg of main couple is remained in 1cm with the distance of the superiors' backing plate, even if so chain block is suddenly loose
De-, momentum caused by 1cm or so dropping distance will not smash steel corbel, but aforesaid operations have the drawbacks of maximum, i.e.,
The process for taking out backing plate is manually operated by worker, once main couple is pounded down, or exist injure by a crashing object human hand, even cause it is tighter
The potential safety hazard of personal injury again.
After second content that the application is related to is that main couple is lifted and dolly retracts, how to dismantle positioned at main truss
The problem of track section below frame.The dismounting of prior art is that worker station is completed on hanging basket, and hanging basket space is small, unstable
Determine, easily rock, so when worker vacantly operates, only can take most simple and crude mode, i.e. gas cutting cuts away this section of track.
This has resulted in huge waste, and every time after the completion of construction, a complete interim i-beam track is cut into some sections and given up
Material, wastes serious, and worker cuts operation, bad environments, dangerous in the enterprising promoting the circulation of qi of hanging basket, in addition exist it is on fire, fall
Potential safety hazard.
Utility model content
The technical problems to be solved in the utility model, which is to provide one kind, can realize that backing plate extracts so as to avoid main couple automatically
For installing the auxiliary of main couple when releasing the construction large-span truss formula steel-structure roof for injuring people by a crashing object and then preventing potential safety hazard
Device.
Technical solution of the present utility model is used for pacifying when being to provide a kind of construction large-span truss formula steel-structure roof
The servicing unit of main couple is filled, it includes four groups of manipulators for being used to extract backing plate, and every group of manipulator includes fixed plate, vertical gas
Cylinder, rotary cylinder and lateral cylinder；Fixed plate is detachably connected on a supporting leg of main couple, and the cylinder body of vertical cylinder is fixed
In fixed plate, the piston rod of vertical cylinder and the fixed part of rotary cylinder are fixed, the rotating part and lateral cylinder of rotary cylinder
Cylinder body fix, the fixture for clamping backing plate is fixed with the piston rod of lateral cylinder.
The method that main couple is installed using servicing unit of the present utility model, its step are included：
A, an i-beam track is each fixed temporarily on each steel corbel of two side walls；
B, worker station is on the operational platform to putting two dollies on every track, then with tower crane by the corner of a main couple
Four supporting legs rest on respectively on four dollies of two tracks, then by the vertical raised line of the electromagnetism of the fixed plate of every group of manipulator
The vertical slot of the corresponding supporting leg of insertion and energization so that the vertical raised line of electromagnetism is connected firmly with supporting leg；
C, four dolly advanced in unison are driven so that the corner of the main couple reaches above corresponding four steel corbels；
D, four groups of worker stations, which are sling main couple from corner with four chain blocks on hanging basket, causes each of main couple
Supporting leg produces gap with corresponding dolly top surface, and is propped up to sandwich plate is laid between each steel corbel and each supporting leg as interim
Support, top layer backing plate and dolly either flush；
E, retract four dollies again, and the orbital segment below main couple of dismantling；
F, four groups of manipulators of synchronous driving take the superiors' backing plate of four corresponding steel corbels away, then with four groups of chain blocks
Four supporting legs are synchronously transferred to the height of one layer of backing plate；Then four groups of manipulators are recycled synchronously to take next layer of backing plate away, then
Four supporting legs are continued to the height of one layer of backing plate of decentralization with four groups of chain blocks；And so on, until whole backing plates be all pumped,
Four supporting legs of main couple are respectively rested on corresponding four steel corbels；
G, each supporting leg is fixed with corresponding steel corbel, and the vertical raised line of the electromagnetism of four groups of manipulators is powered off, finally
The vertical raised line of electromagnetism is extracted out along the vertical slot of supporting leg on hanging basket by worker station, to pull down manipulator.
The utility model construct large-span truss formula steel-structure roof when for install the servicing unit of main couple with it is existing
Technology is compared, and has advantages below and effect：
First, the servicing unit realizes the action of automatic decimation backing plate, instead of manual operation completely, so as to avoid
Main couple releases the situation for injuring people by a crashing object, even triggering more serious personal injury, has prevented potential safety hazard；Moreover, on each supporting leg
Vertical slot provided with upper end open lower end closed, fixed plate side are provided with the vertical raised line of electromagnetism, and the vertical raised line insertion of electromagnetism is vertical
In groove；So, the installation process of above-mentioned mechanical arm only needs worker of the station on the operating platform at track rear by fixed plate
With supporting leg grafting and the absorption that is powered, it can just be automatically moved along dolly in place, fixed operating platform operating environment is good, safety
Stable, the process of installation operation is also simple and convenient, also firm with the fixed effect of main couple after mechanical arm energization absorption；Again
Secondary, the unloading process of mechanical arm is also efficient and convenient, is extracted out after need to only powering off from vertical slot upper shed.
As an improvement, fixture includes the fixed arm being fixed on lateral cylinder piston rod, fixed arm is provided with perpendicular
Ball screw assembly, the sliding block of ball screw assembly, are provided with transfer arm；So, it is only necessary to drive the motor of ball screw assembly, just
The opening-closing clamp that can effectively stablize, it is convenient and reliable that it clamps the process of backing plate.
The servicing unit also includes being arranged on two groups of dismantling of track devices on two concrete side walls of building, every group
Dismantling of track device includes and the one-to-one roller of steel corbel on concrete side wall and the behaviour being fixed on concrete side wall
Make platform；Each roller is arranged on corresponding steel corbel, and temporary track is spirally connected by multiple orbital segments and formed, and track is shelved on rolling
On wheel, operating platform is located at the rear end of track, and the locking device for preventing track from sliding is additionally provided with each steel corbel.
Interim fixation in step a refers to, with the locking device on steel corbel that track and each steel corbel is locked, avoids
Slip along its length occurs for track when dolly carries main couple in orbit；
The dismounting of the orbital segment below main couple in step e refers to, releases locking device, and track is taken out to one backward
The length of orbital segment so that track front end reaches the position of next group of steel corbel, then will by the worker to stand on the operational platform
The screw of last orbital segment is pulled down, and the orbital segment handling dismantled finally is returned into ground with tower crane.
Above-mentioned technical scheme creatively the connection of track and steel corbel is arranged to it is movable, with steel corbel
Roller enables track to be very easily extracted so that and worker can be stood the operation on fixed platform, and track is extracted out paragraph by paragraph,
And dismantle paragraph by paragraph, high-altitude is suspended in midair, constantly rocked, the hanging basket of narrow space compared with prior art, the fixed operation of the application
Platform space is big, steady safety, and can stand the feel at ease on the stationary platform screw by track of having peace of mind of worker is dismantled one by one.So,
Whole operation process is convenient, safely, quickly, without gas cutting naturally without hidden danger on fire, without worrying from hanging basket accidental falling.
Moreover, when dolly carries truss in orbit, locking device can be fixedly secured track, avoid it from sliding dislocation, it is ensured that dolly
Orbit stabilization.Moreover each orbital segment dismantled and can in construction backward is spirally connected the complete rails of Cheng Yigen again
Road, recycle, effectively prevent waste, energy-conserving and environment-protective, good economy performance.
Brief description of the drawings
For installing the servicing unit of main couple when Fig. 1 is the utility model construction large-span truss formula steel-structure roof
Structural representation.
For installing the servicing unit of main couple when Fig. 2 is the utility model construction large-span truss formula steel-structure roof
Partial elevational mplifying structure schematic diagram.
For installing the servicing unit of main couple when Fig. 3 is the utility model construction large-span truss formula steel-structure roof
The side view mplifying structure schematic diagram of track locking device.
Fig. 4 is the mplifying structure schematic diagram of part A in Fig. 1.
For installing the servicing unit of main couple when Fig. 5 is the utility model construction large-span truss formula steel-structure roof
The local overlooking structural representation of the fixed plate of manipulator.
For installing the servicing unit of main couple when Fig. 6 is the utility model construction large-span truss formula steel-structure roof
The overlooking the structure diagram of the fixture of manipulator.
1, concrete side wall shown in figure, 2, steel corbel, 3, roller, 4, track, 4.1, orbital segment, 5, operating platform, 6,
Grip block, 7, installing plate, 8, electromagnet, 9, guide rod, 10, stage clip, 11, magnetic tabletting, 12, main couple, 12.1, supporting leg, 13,
Dolly, 14, backing plate, 15, fixed plate, 16, vertical cylinder, 17, rotary cylinder, 18, lateral cylinder, 19, fixed arm, 20, mobile
Arm, 21, vertical slot, 22, the vertical raised line of electromagnetism, 23, motor, 24, gib block, 25, leading screw.
Embodiment
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, the utility model construction large-span truss formula steel-structure roof when
For installing the servicing unit of main couple, it includes four groups of manipulators for being used to extract backing plate 14, and every group of manipulator includes fixing
Plate 15, vertical cylinder 16, rotary cylinder 17 and lateral cylinder 18.
Fixed plate 15 is detachably connected on a supporting leg 12.1 of main couple 12, and each supporting leg 12.1 is opened provided with upper end
The vertical slot 21 of mouth lower end closed, the side of fixed plate 15 are provided with the vertical raised line 22 of electromagnetism, and the vertical raised line 22 of electromagnetism inserts vertical slot
In 21, and when needing to fix the supporting leg 12.1 of manipulator and main couple 12, the vertical raised line of electromagnetism 22, which is powered, adsorbs it
Supporting leg 12.1.
The cylinder body of vertical cylinder 16 is fixed in fixed plate 15, the piston rod of vertical cylinder 16 and the fixation of rotary cylinder 17
Portion is fixed, and the cylinder body of the rotating part and lateral cylinder 18 of rotary cylinder 17 is fixed, and use is fixed with the piston rod of lateral cylinder 18
In the fixture of clamping backing plate 14.
Fixture includes the fixed arm 19 being fixed on the piston rod of lateral cylinder 18, and fixed arm 19 is provided with vertical with fixed arm 19
Ball screw assembly, the sliding block of ball screw assembly, is provided with transfer arm 20.In particular, fixed arm 19 and transfer arm 20 are flat
OK, motor 23 is fixed with fixed arm 19, the gib block 24 vertical with fixed arm 19, motor are further fixed on fixed arm 19
23 output shaft is fixed with a leading screw 25 parallel with gib block 24, transfer arm 20 and sliding block one, the screwed hole of sliding block with
Leading screw 25 screws and the pilot hole of sliding block slides fit with gib block 24.Motor 23 drives leading screw 25 to rotate, and then to slide
Block drives transfer arm 20 to be translated along the direction of gib block 24, so as to clamp or loosen backing plate 14.
The servicing unit also includes two groups of dismantling of track devices being arranged on two concrete side walls 1 of building.Often
Group dismantling of track device includes and the one-to-one roller 3 of steel corbel 2 on concrete side wall 1 and is fixed on concrete side wall 1
On operating platform 5.
Each roller 3 is arranged on corresponding steel corbel 2, and each steel corbel 2, which is provided with, to be used to prevent track 4 along width side
To two grip blocks 6 of slip, between two grip blocks 6, the axle of roller 3 is just arranged on two grip blocks 6 track 4.Temporarily
Track 4 is spirally connected by multiple orbital segments 4.1 and formed, and track 4 is shelved on whole steel corbels 2 positioned at same concrete side wall 1
On roller 3.
The locking device for preventing track 4 from sliding is additionally provided with each steel corbel 2.Specifically, on each steel corbel 2
One piece of level is fixed with to installing plate 7, an electromagnet 8 is fixed in the lower surface of installing plate 7, and a vertical guiding is fixed in the lower end of electromagnet 8
Bar 9, stage clip 10 is sheathed with guide rod 9, guide rod 9, which slides, is sheathed with a magnetic tabletting 11 for being used for pinch rollers 3.This reality
Apply in example, each installing plate 7 is secured on one piece in two pieces of grip blocks 6 of each steel corbel 2.So, during energization, electromagnetism
Iron 8 adsorbs the lifting of tabletting 11, de-orbits 4, it is ensured that and track 4 smoothly slides on each roller 3, and when powering off, stage clip 10 is multiple
Position, tabletting 11 and track 4 is pressed on roller 3 so that track 4 is locked, it is ensured that dolly 13 is stable on track 4.
Operating platform 5 is located at the rear end of track 4.Operating platform 5 in the present embodiment is steel tube fastener console mode scaffold,
But operating platform 5 can also be arranged to overhanging type, directly encorbelment and be fixed on concrete side wall 1.This way it is possible to avoid from ground
The scaffold formula operating platform 5 of steel tube fastener is directly set up in face, is significantly saved the consumable quantity of steel pipe and fastener, is also omitted
Labor intensity when setting up upwardly from ground.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, main couple is installed using servicing unit of the present utility model
Method, its step are as follows.
A, an i-beam track 4 is each fixed temporarily on each steel corbel 2 of two side walls.
Interim fixation in step a refers to, with the locking device on steel corbel 2 that track 4 and each steel corbel 2 is locked,
Avoid the track 4 when carrying main couple 12 on track 4 of dolly 13 that slip along its length occurs；In particular it is electromagnet
8 power-off, stage clip 10 reset, tabletting 11 and track 4 are pressed on roller 3 so that track 4 is locked.
B, worker station on operating platform 5 to putting two dollies 13 on every track 4, then with tower crane by a main couple 12
Four supporting legs 12.1 of corner rest on respectively on four dollies 13 of two tracks 4, then by the fixed plate of every group of manipulator
The vertical slot 21 of the 15 vertical corresponding supporting leg 12.1 of the insertion of raised line 22 of electromagnetism is simultaneously powered so that the vertical raised line 22 of electromagnetism and supporting leg
12.1 are connected firmly.
C, four advanced in unison of dolly 13 are driven so that the corner of the main couple 12 reaches on corresponding four steel corbels 2
Side.
D, four groups of worker stations are sling main couple 12 from corner with four chain blocks on hanging basket so that main couple 12 4
Each supporting leg 12.1 at angle and the corresponding top surface of dolly 13 produce gap such as 1cm, and to each steel corbel 2 and each supporting leg 12.1 it
Between lay sandwich plate 14 as provisional defence support, for preventing main couple 12 from inadvertently falling off；And top layer backing plate 14 with it is small
The spacing of the either flush of car 13, i.e. top layer backing plate 14 and supporting leg 12.1 is also 1cm.
E, retract four dollies 13 again, and dismantles positioned at the orbital segment 4.1 of the lower section of main couple 12.
The dismounting of the orbital segment 4.1 of the lower section of main couple 12 in step e refers to, releases locking device, i.e., logical to electromagnet 8
Electricity, electromagnet 8 is adsorbed the lifting of tabletting 11, de-orbit 4.
Track 4 is taken out to the length of an orbital segment 4.1 backward again so that the front end of track 4 reaches the position of next group of steel corbel 2
Put, then the screw of last orbital segment 4.1 is pulled down by the worker to stand on operating platform 5, will finally be dismantled with tower crane
The handling of orbital segment 4.1 return ground.
In the step, two steel bringing together on same concrete side wall 1, for shelving same main couple 12
Bracket 2 is one group, and before the length of an orbital segment 4.1 is equal to a group of steel corbel 12 to the second before first group
The distance of one steel corbel 12 in face.
F, four groups of manipulators of synchronous driving take the superiors' backing plate 14 of four corresponding steel corbels 2 away, then are pulled with four groups
Cucurbit synchronously transfers four supporting legs 12.1 height of one layer of backing plate 14；Then four groups of manipulators are recycled synchronously to take next layer away
Backing plate 14, then four supporting legs 12.1 are continued with four groups of chain blocks to transfer the height of one layer of backing plate 14；And so on, until
Corresponding to whole backing plates 14 are all pumped, four supporting legs 12.1 of main couple 12 are respectively rested on four steel corbels 2.
In the step, the detailed process for taking backing plate 14 away using manipulator is the height of the vertical alignment jig of cylinder 16, to make
It is concordant with target backing plate 14 to obtain fixture, and lateral cylinder 18 make it that fixture is proceeded to around target backing plate 14, clamp backing plate
After 14, the length of one backing plate 14 of rollback of lateral cylinder 18, the then drive of rotary cylinder 17 fixture rotation so that fixture rotates out of
The top of steel corbel 12, unclamp fixture and to fall in the string bag under backing plate 14；Subsequent rotary cylinder 17 resets, and vertical cylinder 16 is again
Secondary regulation height causes fixture to be alignd with next layer of backing plate 14.
G, each supporting leg 12.1 is fixed with corresponding steel corbel 2, and the vertical raised line 22 of the electromagnetism of four groups of manipulators is broken
Electricity, the vertical slot 21 finally stood by worker along supporting leg 12.1 on hanging basket extracts the vertical raised line 22 of electromagnetism out, to pull down machinery
Hand.
This completes the installation of a main couple 12 to fix, and remaining other main couples 12 also enter in the manner described above
Row installation is fixed.
Claims (4)
1. for installing the servicing unit of main couple during a kind of construction large-span truss formula steel-structure roof, it is characterised in that：It
Including four groups of manipulators for being used to extract backing plate (14), every group of manipulator includes fixed plate (15), vertical cylinder (16), rotary pneumatic
Cylinder (17) and lateral cylinder (18)；Fixed plate (15) is detachably connected on a supporting leg (12.1) of main couple (12), vertically
The cylinder body of cylinder (16) is fixed in fixed plate (15), and the fixed part of the piston rod and rotary cylinder (17) of vertical cylinder (16) is consolidated
Fixed, the cylinder body of the rotating part and lateral cylinder (18) of rotary cylinder (17) is fixed, and is fixed with the piston rod of lateral cylinder (18)
For clamping the fixture of backing plate (14).
2. filled during construction large-span truss formula steel-structure roof according to claim 1 for installing the auxiliary of main couple
Put, it is characterised in that：Fixture includes being fixed on fixed arm (19) on lateral cylinder (18) piston rod, fixed arm (19) be provided with
Its vertical ball screw assembly, the sliding block of ball screw assembly, are provided with transfer arm (20).
3. filled during construction large-span truss formula steel-structure roof according to claim 1 for installing the auxiliary of main couple
Put, it is characterised in that：Each supporting leg (12.1) is provided with the vertical slot (21) of upper end open lower end closed, fixed plate (15) side
It is interior provided with the vertical raised line of electromagnetism (22), the vertical raised line of electromagnetism (22) insertion vertical slot (21).
4. filled during construction large-span truss formula steel-structure roof according to claim 1 for installing the auxiliary of main couple
Put, it is characterised in that：It also includes two groups of dismantling of track devices being arranged on two concrete side walls (1) of building, often
Group dismantling of track device includes and the one-to-one roller (3) of steel corbel (2) on concrete side wall (1) and is fixed on concrete
Operating platform (5) on side wall (1)；Each roller (3) is arranged on corresponding steel corbel (2), and temporary track (4) is by multiple rails
Road section (4.1), which is spirally connected, to be formed, and track (4) is shelved on roller (3), and operating platform (5) is located at the rear end of track (4), Mei Gegang
The locking device for preventing track (4) from sliding is additionally provided with bracket (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720686394.XU CN206888540U (en) | 2017-06-01 | 2017-06-01 | The servicing unit of main couple is installed during construction truss-like roof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720686394.XU CN206888540U (en) | 2017-06-01 | 2017-06-01 | The servicing unit of main couple is installed during construction truss-like roof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206888540U true CN206888540U (en) | 2018-01-16 |
Family
ID=61318465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720686394.XU Active CN206888540U (en) | 2017-06-01 | 2017-06-01 | The servicing unit of main couple is installed during construction truss-like roof |
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| CN (1) | CN206888540U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107130804A (en) * | 2017-06-01 | 2017-09-05 | 浙江省二建钢结构有限公司 | The servicing unit and installation method of main couple are installed during construction truss-like roof |
| CN110748177A (en) * | 2019-10-28 | 2020-02-04 | 罗丽芳 | Assembled steel truss is built and is removed interim supporting equipment |
| CN111764666A (en) * | 2020-07-11 | 2020-10-13 | 潘岳燕 | Steel construction factory building truss equipment system of processing |
-
2017
- 2017-06-01 CN CN201720686394.XU patent/CN206888540U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107130804A (en) * | 2017-06-01 | 2017-09-05 | 浙江省二建钢结构有限公司 | The servicing unit and installation method of main couple are installed during construction truss-like roof |
| CN110748177A (en) * | 2019-10-28 | 2020-02-04 | 罗丽芳 | Assembled steel truss is built and is removed interim supporting equipment |
| CN111764666A (en) * | 2020-07-11 | 2020-10-13 | 潘岳燕 | Steel construction factory building truss equipment system of processing |
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