CN109469201A - Thin-walled light steel frame structure, thin-walled light steel member and preparation method thereof - Google Patents
Thin-walled light steel frame structure, thin-walled light steel member and preparation method thereof Download PDFInfo
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- CN109469201A CN109469201A CN201811365670.8A CN201811365670A CN109469201A CN 109469201 A CN109469201 A CN 109469201A CN 201811365670 A CN201811365670 A CN 201811365670A CN 109469201 A CN109469201 A CN 109469201A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/19—Three-dimensional framework structures
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
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Abstract
本发明涉及一种薄壁轻钢框架结构、薄壁轻钢构件及其制备方法，该薄壁轻钢构件包括管状本体，管状本体设有中空腔体，管状本体的壁面折合形成多个沿管状本体的长度方向延伸的凸棱，至少一个凸棱的内侧设有加强肋，加强肋沿着管状本体的长度方向延伸。该薄壁轻钢构件及薄壁轻钢框架结构的稳定性和强度较高，在使用过程中不易弯曲变形，能大大提高薄壁轻钢结构装配式建筑的使用寿命和抗震抗风能力。该薄壁轻钢构件的制备方法方便制备所述薄壁轻钢构件，且步骤简单，成本低廉。
The invention relates to a thin-walled light steel frame structure, a thin-walled light-steel component and a preparation method thereof. The thin-walled light-steel component includes a tubular body, the tubular body is provided with a hollow cavity, and the wall surface of the tubular body is folded to form a plurality of along the tubular body. The ribs extending in the length direction of the body are provided with reinforcing ribs on the inner side of at least one of the ribs, and the reinforcing ribs extend along the length direction of the tubular body. The thin-walled light-steel component and the thin-walled light-steel frame structure have high stability and strength, are not easy to bend and deform during use, and can greatly improve the service life and seismic and wind resistance of the thin-walled light-steel structure prefabricated building. The preparation method of the thin-walled light steel component is convenient for preparing the thin-walled light steel component, and the steps are simple and the cost is low.
Description
Technical field
The present invention relates to structural engineering technical fields, light more particularly to a kind of thin-walled light steel frame, thin-walled
Steel member and preparation method thereof.
Background technique
Thin-walled lightweight steel construction assembled architecture has many advantages, such as compared to traditional concrete construction, such as builds and tear open
Environmental pollution is small, heat insulating effect is higher and sound insulation capabilities are stronger etc. is unloaded in easy, work progress, therefore is got in recent years
To get over the favor by domestic and international building trade.Thin-walled lightweight steel construction assembled architecture mainly forms light steel by thin-walled lightweight steel component
Structure portal frame or truss constitute load-carrying members.But traditional thin-walled lightweight steel component be easy to produce in use it is curved
Bent and deformation, to influence the service life of thin-walled lightweight steel construction assembled architecture and keep its antidetonation and wind loading rating weaker.
Summary of the invention
Based on this, it is necessary to provide a kind of thin-walled light steel frame, thin-walled lightweight steel component and preparation method thereof, the thin-walled
The stability and intensity of light steel frame and thin-walled lightweight steel component are higher, are not easy bending deformation in use, can be significantly
Improve the service life and antidetonation wind loading rating of thin-walled lightweight steel construction assembled architecture, the preparation method side of the thin-walled lightweight steel component
Just the thin-walled lightweight steel component is prepared, and step is simple, it is low in cost.
A kind of thin-walled lightweight steel component, including tubular body, the tubular body are equipped with hollow cavity, the tubular body
The equivalent fin for forming multiple length directions along the tubular body and extending of wall surface, the inside of at least one fin is equipped with
Ribs, the ribs extend along the length direction of the tubular body.
The thin-walled lightweight steel component includes tubular body, is equipped with ribs on the inside of the fin of tubular body, which strengthens
The strength and stability of thin-walled lightweight steel component.Since the lightweight steel construction portal frame or truss of thin-walled lightweight steel component composition are thin-walleds
The major bearing structures of lightweight steel construction assembled architecture, so thin-walled lightweight steel construction is primarily subjected to drawing force, compressing force and curved scissors
Power.The setting in the case where the wall thickness of thin-walled lightweight steel component is constant, can greatly improve thin-walled lightweight steel component stretch-proof,
The ability that incompressible and bending resistance is cut, to improve the service life and antidetonation wind loading rating of thin-walled lightweight steel construction assembled architecture.
The ribs is reinforcing bar in one of the embodiments, and the reinforcing bar is fixed on the inside of the fin and edge
The length direction of the tubular body extends.Reinforcing bar have it is biggish bear the ability of tensile stress and cheap and easy to get, this can be reduced
The cost of manufacture of thin-walled lightweight steel component.
In one of the embodiments, described in the interior lateral projecting inward formation of hollow cavity of at least one fin
Ribs.The setting is so that the ribs is an integral molding structure with the fin, on the one hand without additional material
It is made the ribs, on the other hand save the cost can also be such that the ribs connect with the inside of the fin and more step up
It is close.
The inner wall of the tubular body is equipped with the first reinforcing rib, first reinforcing rib edge in one of the embodiments,
The tubular body inner wall circumferentially be arranged.These reinforcing ribs can greatly increase the axial, vertical of thin-walled lightweight steel component
With lateral bearing capacity, increase the ability of the anti-shearing and resistance to deformation of thin-walled lightweight steel component.
The second reinforcing rib, the both ends of second reinforcing rib are equipped in the tubular body in one of the embodiments,
It is connect respectively with the inside of two non-conterminous fins.The radial stability of tubular body can be improved in the setting, increases its anti-shape
The ability of change.
The tubular body is tetragonous column tube in one of the embodiments, and the fin is four, and the ribs is
It four and is corresponded with four fins.The setting is so that the structure of the thin-walled lightweight steel component is more stable, and conveniently
Frame structure is formed, is equipped with the ribs on the inside of four fins, it is possible to increase the tension of the thin-walled lightweight steel component
It stretches, the ability that incompressible and bending resistance is cut.
A kind of thin-walled light steel frame, including fastener and at least two above-mentioned thin-walled lightweight steel components are thin described in every two
It is connected between wall lightweight steel component by the fastener, at least two thin-walled lightweight steel components enclose frame structure.
The thin-walled light steel frame includes above-mentioned thin-walled lightweight steel component, therefore also has above-mentioned thin-walled lightweight steel component
Technical effect, i.e. the stability and intensity of the thin-walled lightweight steel component are higher, are not easy bending deformation in use, can mention significantly
The service life and antidetonation wind loading rating of high thin-walled lightweight steel construction assembled architecture.
A kind of preparation method of thin-walled lightweight steel component, comprising the following steps:
Thin-walled steel plate is provided；
The thin-walled steel plate bending is enclosed into the tubular body with hollow cavity, the wall surface of the tubular body is equivalent
Form the fin that multiple length directions along the tubular body extend；
Ribs is provided, and in the fixed ribs in the inside of at least one fin.
In the preparation method of the thin-walled lightweight steel component, the tubulose sheet with hollow cavity is enclosed using thin-walled steel plate bending
The fin inside of body, tubular body is fixed with ribs, so that the stronger thin-walled lightweight steel component of stability and intensity be made.
The preparation method of the thin-walled lightweight steel component is easy to operate, low in cost.
A kind of preparation method of thin-walled lightweight steel component, comprising the following steps:
Thin-walled steel plate is provided；
The thin-walled steel plate bending is enclosed into the tubular body with hollow cavity, the wall surface of the tubular body is equivalent
Form the fin that multiple length directions along the tubular body extend；
Make at least one described fin on the tubular body to the projecting inward formation ribs of the hollow cavity.
In the preparation method of the thin-walled lightweight steel component, the tubulose sheet with hollow cavity is enclosed using thin-walled steel plate bending
Body makes the interior lateral projecting inward formation ribs of hollow cavity of at least one fin on the tubular body, from
And stability and the higher thin-walled lightweight steel component of intensity is made.The preparation method of the thin-walled lightweight steel component is easy to operate, at low cost
It is honest and clean.
Described at least one described fin made on the tubular body is to the hollow cavity in one of the embodiments,
Protrusion forms ribs in vivo, comprising the following steps:
So that at least one described fin on the tubular body is recessed inwardly and the two sides Steel Thin-Wall of the fin will be formed
Plate is squeezed to close to the fin direction to form ribs in the inside of the fin.The step is without using additional materials system
At ribs, production cost is saved, and the ribs and fin that are formed are integrally formed, and are connected firmly.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of thin-walled lightweight steel component described in one embodiment of the invention；
Fig. 2 is the cross-sectional view of thin-walled lightweight steel component shown in FIG. 1；
Fig. 3 is the A-A sectional view of thin-walled lightweight steel component shown in Fig. 2；
Fig. 4 is the structural schematic diagram of thin-walled lightweight steel component described in another embodiment of the present invention；
Fig. 5 is the cross-sectional view of thin-walled lightweight steel component shown in Fig. 4；
Fig. 6 is the B-B sectional view of thin-walled lightweight steel component shown in fig. 5.
Description of symbols
10, thin-walled lightweight steel component, 100, tubular body, 110, hollow cavity, 120, fin, 200, ribs, 300,
One reinforcing rib.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, below in conjunction with attached drawing and specific embodiment party
Formula, the present invention is further described in detail.It should be understood that the specific embodiments described herein are only to solve
The present invention is released, and the scope of protection of the present invention is not limited.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more
Any and all combinations of relevant listed item.
As illustrated in figure 1 or 4, one embodiment of the invention proposes a kind of thin-walled lightweight steel component 10, including tubular body 100,
The tubular body 100 is equipped with hollow cavity 110, the wall surface of the tubular body 100 is equivalent formed it is multiple along the tubulose sheet
The inside of the fin 120 that the length direction of body 100 extends, at least one fin 120 is equipped with ribs 200, the reinforcement
Rib 200 extends along the length direction of the tubular body 100.
The thin-walled lightweight steel component 10 includes tubular body 100, is equipped with ribs on the inside of the fin 120 of tubular body 100
200, which strengthens the strength and stability of thin-walled lightweight steel component 10.The lightweight steel construction formed due to thin-walled lightweight steel component 10
Portal frame or truss are the major bearing structures of thin-walled lightweight steel construction assembled architecture, so thin-walled lightweight steel construction is primarily subjected to
Drawing force, compressing force and curved scissors power.The setting can be greatly improved in the case where the wall thickness of thin-walled lightweight steel component 10 is constant
The ability that the stretch-proof of thin-walled lightweight steel component 10, incompressible and bending resistance are cut, to improve thin-walled lightweight steel construction assembled architecture
Service life and antidetonation wind loading rating.
In one embodiment, as shown in Figure 1 to Figure 3, the ribs 200 is reinforcing bar, and the reinforcing bar is fixed on described
The inside of fin 120 and along the length direction of the tubular body 100 extend.Reinforcing bar has the biggish ability for bearing tensile stress
And it is cheap and easy to get, the cost of manufacture of the thin-walled lightweight steel component 10 can be reduced.
Specifically, the inside of the reinforcing bar and the fin 120 passes through welded connecting.The setting is so that the ribs
200 connect with the inside of the fin 120 it is more firm.
In another embodiment, as shown in Figures 4 to 6, the interior lateral hollow cavity of at least one fin 120
Body 110 is projecting inward to form the ribs 200.Setting knot so that the ribs 200 and the fin 120 are integrally formed
On the one hand the ribs 200 is made without additional material in structure, save the cost, on the other hand can also make it is described plus
Strong rib 200 connect even closer with the inside of the fin 120.
Further, the inner wall of the tubular body 100 be equipped with the first reinforcing rib 300, first reinforcing rib 300 along
The inner wall of the tubular body 100 is circumferentially arranged.These reinforcing ribs 300 can greatly increase the axis of thin-walled lightweight steel component 10
To, vertical and lateral bearing capacity, increase the ability of the anti-shearing and resistance to deformation of thin-walled lightweight steel component 10.
Specifically, first reinforcing rib 300 is at least two and at least two first reinforcing ribs 300 along described
The axial direction interval of tubular body 100 is arranged.
Specifically, it is additionally provided with the second reinforcing rib (attached drawing is not shown) in the tubular body 100, second reinforcing rib
Both ends are connect with the inside of two non-conterminous fins 120 respectively.The radial stability of tubular body 100 can be improved in the setting,
Increase the ability of its anti-deformation.
Specifically, second reinforcing rib is at least two and at least two second reinforcing ribs along the tubulose sheet
The axial direction interval of body 100 is arranged.
Optionally, the tubular body 100 is tetragonous column tube, and the fin 120 is four, and the ribs 200 is four
It is a and corresponded with four fins 120, as illustrated in figure 1 or 4.The setting so that the thin-walled lightweight steel component 10 knot
Structure is more stable, and facilitates and to form frame structure, and the inside of four fins 120 is equipped with the ribs 200, it is possible to increase
The ability that stretch-proof, the incompressible and bending resistance of the thin-walled lightweight steel component 10 are cut.In the present embodiment, first reinforcing rib 300
For the quadrangle framework being circumferentially arranged along the inner wall of the tubular body 100.In other embodiments, second reinforcing rib
Triangle framework is enclosed with first reinforcing rib 300.
In the present embodiment, the tubular body 100 is made of galvanized steel plain sheet material.Galvanized steel plain sheet has stronger antioxygen
Change ability can extend the service life of the tubular body 100.Specifically, it the surface silicone-coating of the galvanized steel plain sheet and adopts
It removes two baking techniques with two to be process, so that the galvanized steel plain sheet has stronger durability and corrosion resistance.
Optionally, the galvanized steel plain sheet with a thickness of 0.89mm~2.58mm；The model Q345 of the galvanized steel plain sheet or
Q390.Certainly, in other embodiments, the thickness of the galvanized steel plain sheet and model can also be selected according to actual needs.
One embodiment of the invention also proposes a kind of thin-walled light steel frame, including fastener and at least two above-mentioned thin-walleds it is light
Steel member 10 is connected between thin-walled lightweight steel component 10 described in every two, at least two light steel structures of thin-walled by the fastener
Part 10 encloses frame structure.
The thin-walled light steel frame includes above-mentioned thin-walled lightweight steel component 10, therefore also has above-mentioned thin-walled lightweight steel component
10 technical effect, i.e. the stability and intensity of the thin-walled lightweight steel component 10 are higher, are not easy bending deformation, energy in use
Greatly improve the service life and antidetonation wind loading rating of thin-walled lightweight steel construction assembled architecture.
One embodiment of the invention also proposes a kind of preparation method of thin-walled lightweight steel component, comprising the following steps:
S100, thin-walled steel plate is provided；
S200, the thin-walled steel plate bending is enclosed to the tubular body 100 with hollow cavity 110, the tubulose sheet
The equivalent fin 120 for forming multiple length directions along the tubular body 100 and extending of the wall surface of body 100；
S310, ribs 200 is provided, and in the fixed ribs 200 in the inside of at least one fin 120.
In the preparation method of the thin-walled lightweight steel component, the pipe with hollow cavity 110 is enclosed using thin-walled steel plate bending
Shape ontology 100 is fixed with ribs 200 on the inside of the fin 120 of tubular body 100, thus be made stability and intensity compared with
Strong thin-walled lightweight steel component 10.The preparation method of the thin-walled lightweight steel component is easy to operate, low in cost.
In one embodiment, further comprising the steps of after step S310:
S410, the first reinforcing rib 300 is provided, and first reinforcing rib 300 is fixed in the tubular body 100
On wall, first reinforcing rib 300 is circumferentially arranged along the inner wall of the tubular body 100.
In another embodiment, further comprising the steps of after step S310:
S420, the tubular body 100 both ends in axial direction to intermediate compression, on the inner wall of tubular body 100
The first reinforcing rib 300 is formed, first reinforcing rib 300 is circumferentially arranged along the inner wall of the tubular body 100.
It is further, further comprising the steps of after step S310,
S500, provide the second reinforcing rib, and make the both ends of second reinforcing rib respectively with two non-conterminous fins 120
Inside connection.
One embodiment of the invention also proposes a kind of preparation method of thin-walled lightweight steel component, comprising the following steps:
S100, thin-walled steel plate is provided；
S200, the thin-walled steel plate bending is enclosed to the tubular body 100 with hollow cavity 110, the tubulose sheet
The equivalent fin 120 for forming multiple length directions along the tubular body 100 and extending of the wall surface of body 100；
S320, keep at least one described fin 120 on the tubular body 100 projecting inward to the hollow cavity 110
Form ribs 200.
In the preparation method of the thin-walled lightweight steel component, the pipe with hollow cavity 110 is enclosed using thin-walled steel plate bending
Shape ontology 100 makes interior lateral 110 convex of hollow cavity of at least one fin 120 on the tubular body 100
Ribs 200 is formed out, so that stability and the higher thin-walled lightweight steel component 10 of intensity be made.The preparation of the thin-walled lightweight steel component
Method is easy to operate, low in cost.
In one embodiment, further comprising the steps of after step S320:
S410, the first reinforcing rib 300 is provided, and first reinforcing rib 300 is fixed in the tubular body 100
On wall, first reinforcing rib 100 is circumferentially arranged along the inner wall of the tubular body 100.
In another embodiment, further comprising the steps of after step S320:
S420, the tubular body 100 both ends in axial direction to intermediate compression, on the inner wall of tubular body 100
The first reinforcing rib 300 is formed, first reinforcing rib 300 is circumferentially arranged along the inner wall of the tubular body 100.
It is further, further comprising the steps of after step S320,
S500, the second reinforcing rib 300 is provided, and keeps the both ends of second reinforcing rib 300 non-conterminous with two respectively
The inside of fin 120 connects.
Specifically, the thin-walled steel plate is bent by way of clod wash or hot rolling encloses the pipe with hollow cavity 110
Shape ontology 100.
Further, described at least one described fin 120 made on the tubular body 100 is to the hollow cavity
110 projecting inward formation ribs 200, specifically includes the following steps:
At least one described fin 120 on the tubular body 100 is set to be recessed inwardly and the two of the fin 120 will be formed
Side thin-walled steel plate is squeezed to close to 120 direction of fin to form ribs 200 in the inside of the fin 120.The step
Be made ribs 200 without using additional materials, save production cost, and the ribs 200 that is formed and 120 one of fin at
Type is connected firmly.
Further, the tubular body 100 can form tubular body of different shapes by the modes such as bending or welding
100, the L shape tubular body 100 as shown in Fig. 1 or Fig. 4.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of thin-walled lightweight steel component, which is characterized in that including tubular body, the tubular body is equipped with hollow cavity, described
The equivalent fin for forming multiple length directions along the tubular body and extending of the wall surface of tubular body, at least one described fin
Inside be equipped with ribs, the ribs along the tubular body length direction extend.
2. thin-walled lightweight steel component according to claim 1, which is characterized in that the ribs is reinforcing bar, and the reinforcing bar is solid
Due to the fin inside and along the length direction of the tubular body extend.
3. thin-walled lightweight steel component according to claim 1, which is characterized in that at least one fin it is interior lateral described
Hollow cavity is projecting inward to form the ribs.
4. thin-walled lightweight steel component according to any one of claim 1 to 3, which is characterized in that the tubular body it is interior
Wall is equipped with the first reinforcing rib, and first reinforcing rib is circumferentially arranged along the inner wall of the tubular body.
5. thin-walled lightweight steel component according to any one of claim 1 to 3, which is characterized in that set in the tubular body
There is the second reinforcing rib, the both ends of second reinforcing rib are connect with the inside of non-conterminous two fins respectively.
6. thin-walled lightweight steel component according to any one of claim 1 to 3, which is characterized in that the tubular body is four
Prism pipe, the fin are four, and the ribs is four and corresponds with four fins.
7. a kind of thin-walled light steel frame, which is characterized in that including fastener and at least two any one of claims 1 to 6
The thin-walled lightweight steel component is connected by the fastener between thin-walled lightweight steel component described in every two, and at least two is described thin
Wall lightweight steel component encloses frame structure.
8. a kind of preparation method of thin-walled lightweight steel component, which comprises the following steps:
Thin-walled steel plate is provided；
The thin-walled steel plate bending is enclosed into the tubular body with hollow cavity, the wall surface of the tubular body is equivalent to be formed
The fin that multiple length directions along the tubular body extend；
Ribs is provided, and in the fixed ribs in the inside of at least one fin.
9. a kind of preparation method of thin-walled lightweight steel component, which comprises the following steps:
Thin-walled steel plate is provided；
The thin-walled steel plate bending is enclosed into the tubular body with hollow cavity, the wall surface of the tubular body is equivalent to be formed
The fin that multiple length directions along the tubular body extend；
Make at least one described fin on the tubular body to the projecting inward formation ribs of the hollow cavity.
10. the preparation method of thin-walled lightweight steel component according to claim 9, which is characterized in that described to make the tubulose sheet
At least one described fin on body to the projecting inward formation ribs of the hollow cavity, specifically includes the following steps:
So that at least one described fin on the tubular body is recessed inwardly and will be formed the two sides thin-walled steel plate of the fin to
It squeezes close to the fin direction to form ribs in the inside of the fin.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811365670.8A CN109469201A (en) | 2018-11-16 | 2018-11-16 | Thin-walled light steel frame structure, thin-walled light steel member and preparation method thereof |
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| CN201811365670.8A CN109469201A (en) | 2018-11-16 | 2018-11-16 | Thin-walled light steel frame structure, thin-walled light steel member and preparation method thereof |
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| JP2012037113A (en) * | 2010-08-05 | 2012-02-23 | Kanazawa Kikai:Kk | Duct manufacturing method and roll molding machine |
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| CN209509169U (en) * | 2018-11-16 | 2019-10-18 | 广东白云学院 | Thin-walled lightweight steel component and thin-walled light steel frame |
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| CN2243040Y (en) * | 1994-09-24 | 1996-12-18 | 王爱民 | Energy-saving silencing fire-retardant damp-proof air duct |
| JP2003148794A (en) * | 2001-11-07 | 2003-05-21 | Sumitomo Corp | Spiral flocked square duct |
| CN201517664U (en) * | 2009-08-19 | 2010-06-30 | 胡志超 | Colored steel composite air pipe |
| WO2011021574A1 (en) * | 2009-08-21 | 2011-02-24 | 三菱重工業株式会社 | Duct arrangement, duct equipment, duct reinforcement construction method, support reinforcement structure, and reinforcement structure for support fixing unit |
| JP2012037113A (en) * | 2010-08-05 | 2012-02-23 | Kanazawa Kikai:Kk | Duct manufacturing method and roll molding machine |
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