SG174437A1

SG174437A1 - Fitting-type folded-plate roofing material

Info

Publication number: SG174437A1
Application number: SG2011066933A
Authority: SG
Inventors: Tomohide Someya; Norio Kudo
Original assignee: Jfe Galvanizing & Coating Co Ltd
Priority date: 2009-04-22
Filing date: 2010-04-16
Publication date: 2011-10-28
Also published as: AU2010240349A1; JP2010255218A; TWI460340B; JP5204031B2; KR101319168B1; TW201040364A; KR20110134893A; CN102405323A; AU2010240349B2; CN102405323B; MY172145A; WO2010122752A1

Abstract

AbstractFITTING-TYPE FOLDED-SHEET ROOFING MATERIALA fitting-type folded-sheet roofing material having a high degree of seam joint forming which can enhance mutual support strength of an inner-side seam fitting part and an outer-side seam fitting part, and can prevent a seam joint forming section from being loosened or disengaged even when pushing pressure is applied to the roofing material is provided_ The roofing material includes: a base part which forms a widthwise center portion of a rectangular metal sheet; inclined side plate parts which are raised from both widthwise edges of the base part respectively; horizontal parts which extend in the horizontal direction from upper end portions of the inclined side plate parts respectively; and an inner-side seam fitting part and an outer-side seam fitting part which are formed upright on both free edgeportionsofthehorizontal parts respectively, wherein the outer-side seam fitting part comprises: a base-part-side leg part which is raised from an edge periphery of the horizontal part; a dome-shaped head part which is contiguously formed with an upper end portion of the base-part-side leg part; and a side-edge-part-side leg part which is formed at a position on an extension from the dome-shaped head part thus exhibiting an approximately mushroom-shaped cross section, and the inner-side seam fitting part comprises: a leg part which is raised from an edge periphery of the horizontal part; and a crest head part which is contiguously formed with an upper end portion of the leg part thus exhibiting an approximately umbrella-shaped cross section.

Description

Title ¢f the Invention

PITTING-TYRE FOLDED~SHEET ROOFING MATERIAL

Technical Field [COOL]

The present invention relates to a metal fitting-type foided-sheet roofing material, and mors particularly To oa fitting-type folded-sheest roofing material which can realize roofing by easily and spesdily connecting end parts of neighboring roofing materials to esach other by sesm joint forming, exhibits excellent external appearance and can impart the excellent strength to a seam Joint part against a storm cr the Idke.

Background Art [oDa2i

Az a roofing method spplilicable Lo & plant, a warehouse, a shop er the like, conventionally, there has besn known a mathod where roof brackets are fixed to a roof bed (beans! at fixed dntervals, and one metal folded-~gheet roofing material provided with sn inner-side seam f£itting part formed on one side edge portion thereof in the widthwise direction and the cther neighboring roofing material provided with an cuter-side seam fitting part {upper fitting) formed on the other side edge portion thereof in the widithwise dirsction are connected to sach other by seam joint forming by means of the roof bracket, and these metal folded-sheet zreofing materials are sequentially connected to each other thus completing roofing in a boltless state (fitting type! {patent documents 1, 2). [C003]

As such a conventional fitting-type Ifolded-sheet recfing material, there have been known a folded~-sheet roofing material which adopts an angular seam joint where inner and cuter fitting parts have an inverse L-shape {patent document 1), a folded-sheet roofing material which adopts a circular seam joint where inner and cuter fitting parts have an approximately circular shape (patent document 2), and = folided-sheet roofing material which adopts a triangular seam doint where inner and outer fitting parts have a triangular shape.

[0004]

However, the roof sheet disclosed in patent decument 1 hag the following drawbacks. That lz, when upward pressure ig applied te a main plate part due to a gust of wind, a rotational moment caused by wind pressure or the Like ig applied to at least either one of the inner-side ssam fitting part {inverze L-shape} and the outer-zide seam fitting part su that the seam joint part is easily disengaged, or when a worker walks

Z on a roof so that a downward pressure is applied to the main plate part, a seam Joint part is lcosenad or disengaged.

F005]

Further, in the folded-zheet roof sheel disclozed in patent document 2, the structure of the inner-side and puter-aide seam Fitting parts which form a joint portion of roofing materials adopts the fitting structure having a oircular cross section and hence, the felded-sheet roof sheet possesses the stable strength after fitting against negative pressure generated by a gust of wind or a pushing pressure generated by a stepping-on action of a worker or the like.

However, ssam joint formability is not encugh and hence, there still remain drawbacks that positions where crest parts of the outer-side seam fitting parts are bent are liable to become irregular during seam Joint forming, fastening strength is weak, and linearity is liable to be lost. 0006]

When the bending pesiticens of the outer seam joints are not fixed {for example, as shown in 11, a case where the pass center of the outer seam joint ils offset Lo a right side from the center (Fig. 1l{a}} or to a left side from the center (Fig.

Ligh), seam Joint forming strength ls lowered.

[6007]

Further, when the inner-side and outer-side seam fitting carte are formed of a triangular ssam joint, seam joint forming is easy, roofingmaterlals are firmly connected with each other by fitting, and the inner-side and cuter-side seam fitting parts possess stable strength against wind pressure after fitting. However, the structure has the following drawbacks.

That is, a folding ridge {(foliding line) of a crest part of the cuter-side seam fitting part is sharp and hence, 1t isdifficult to make the roofing material conform to the distortion of the background or brackets {tight frames) of an existing roof whereby there have been drawbacks that the linearity and gocuracy in shape of external appearance arg poor. [A008]

Further, the metal sheet has the tolerance of 0 to +Tmm in a width of a original sheet, and the inner-side seam fitting part and the outer-side seam fitting gart which are formed on both side edge portions of the metal sheet absorb the tolerance.

Accordingly, there has been a cass where shapes of the fitting parts are changed for every metal sheet so that the inner-side seam fitting part and the cuter-side seam fitting part cannot he completely fitted to each other.

[0009]

In such a work for constructing fitting-type roofing materiale, it is difficult to determine whether a seam joining fitting state is good or kad from the outside at the time of construction and hence, how the seam jeint forming fitting structure of roof sheet, for example, shapes of the inner-aide and outer-side seam fitting parts should be designed is extremely important.

Prior art literature

Patent document

FO01a]

Patent document 1: JE-A-2003~82820

Patent document 2: JP-U-54-18018

Summary of the Invention

Problems that the Inventlon ig to Solve [00117

With respect to the above-mentioned prior art, ithe following drawbacks have been pointed out. The fisating-cff ef a revfing naterial whieh 1s observed in a boltless construction roof which is the subject of the present invention, that ig, the floating-off of the rociing material caused by wind pressure ia liable to ooour. The seam joint forming section iz lizble to be loosened or disengaged (patent document 1).

There still remains a space for improvemsnt with respect to seam Joint formsbility {electrically-operated seam Joint formabiliiity) and linearity of a ridge line, that is, the finish of the appearance of roofing {patent document 2}. Further, the inner-zide and outer-zide seam fitting paris exhiblii poor accuracy in shape or have little bending rigidity,

particularly low Joining strength at parts where a bracket {tight frame) is not provided. [o01a;

Accordingly, it is an object of the present invention to provide a fitting-type folded~sheet recfing material having a high degree of seam joint forming {Joining strength}? which, in constructing the fitting-type Iolded-sheet roofing material, can enhance nutual support strength of an inner-sids seam fitting part and an outer-side seam fitting part, can prevent a seam Joint forming section from being loosened or disengaged even when negative pressure generated by a gust of wing iz applied to a roofing material or pushing pressures generated by stepping on of a worker or the like is applied

Lo a roofing material, Tt 1s alse an object of the present invention to provide a Ditting-type fLaldsd-sheest roofing material which possesses high accuracy in shapes of cuter and inner-side seam fitting parts without being infiuvenced by an error ina width of an original sheet for a metal sheet, exhibits excellent sean joint forming formability, exhibits a beautiful seam joint forming appearance shape, and can realize easy and speedy roofing.

Means for Solving the Problems

[0013]

To realize the above-mentioned objects by overcoming the &

above-mentioned drawbacks that the prior art has, inventors of the present invention have made extensive studies, and have developed the present invention having the Icllowing constitution which forms the gist of the present invention.

That is, the present invention diszcloges a fitting-type folded-sheet roofing material comprising: a base part which formg a widthwise center portion of a rectangular metal sheet; inclined side plate parts which are raised from both widthwise adges of the base part in respective obligue directions respectively; horizontal parts which extend in the horizontal direction from upper end portions of the inclined side plate parts respectively: and an inner-side seam fitiing part and an cuter-side seam fitting part which are formed upright on both free edge portions of the horizontal paris respectively, nelghboring metal sheets being connected to each other Ly way of the inngr-side and oulter-zide seam filling parts, whsrein the cuter-side seam fitting part comprisas: a hagse-part-gide leg part which is raised from an edge periphery of the horizontal part: a dome-shaped head part which is contiguously formed with an upper end portion of the hase-part-gide leg part; and a side-edge-part-side leg part which ig formed in a seam joining fitting state at a position on an extension from the dome-shaped head part thus exhibiting zn approximately mushroom—shaped cross section, and the inner-side seam fitting part comprises: a leg part which ls raised from an edge periphery of the horizontal part; and a crest head part which is contiguously formed with an upper end portion of the leg part thus exhibiting an approximately unbrella~shaped cross ssction. [CD14]

In the above-mentioned roofing material of the praesent invention, the followings are provided as preferred means for spliving the task.

In the outer-zide sean fitting part, a folding line which iz formed of a projecting ridge part having a different curvartre is formed on a peak portion of the dome-shaped head part,

In the inner-side seam fitting part, a Iolded-back overlapped portion is formed on a non-leg-part side of the great head part.

The base-part-side leg part of the ouber-side seam fitting part and the leg part of the inner-side seam fitting part are formed so as te rise obliquely Irom the edge peripheries of the respective horizontal parts respectively.

One or a plurality of small stepped portions is/are formed on the inclined side plate in the height direction.

A large stepped portion which is indented toward a base cart side is formed on the inclined side plate al a bending start position at a lower end of the inclined side plate adiacent te the base part.

A bulging recessed portion which ig indented fLeward the base part side is formed on an upper end of the inclined side plate adiacent to the horizontal part.

Advantages of the Invention

[0015]

According to the present inventicn which adopts the sbove-menticned constitutions, by adopting the seam joint forming fitting structures where the cuter-sgide seam fitting part has a mushroom shape and the lnner-side seam fitting part has an umbrella shape, sven when pressure 1s applied to either a left or right side of a roof sheet due te a gust of wind, stapping on of a werker or the like, the inner-aide seam fitting part and the cuter-side seam fitting part impinge on €ach cther at bulging portions formed on both left and right sides so that the rotation of the roof sheet iz constrained. Accordingly, aven when negative pressures causad by a gust of wind 1s applied to the roofing material or pushing pressure caused by stepping cn of a worker dis applied to the roofing material, there is no possibility that the roofing material ig rotated so that a seam iolning fitting state is easily locsenad or disengaged thereby effectively preventing the intrusion of rain. [o01e;

Further, according to the roofing material of the present invention, by forming the folding line in advance on the peak portion of the dome-shaped head part of the cuber-side seam fitting part, seam Joint forming (s=sam forming) can be easily performed, and the linearity (passing center) of the ridge line (ridge) is high so that the construction error attributed to the distortion of the background of a roof or a bracket (tight frame) can be easily aksorbad and thereby the shape of the rocefing appearance can be beautifully finished.

[0017]

Further, according to the present invention, joining strength of a seam joining fitting state by the inner-side and suter-side seam fitting parts is strong, and the inner-side seam fitting part is alse provided with the folded-kack overlapped portion and hence, the inner-side seam fitting part exhibits high accuracy in shape, and exhibits the excellent shape stability and fitting strength after seam Joint forming, r001e]

Further, according to the present lnvention, by inckining the raised side plate from the base part, a2 crest height from the base part of the roof gheat To the peak portion of the fitting part is increased and hence, bending rigidity of the roof sheel can be enhanced.

Brief Description of the Drawings [CD19]

Fig. 1 ds a front view showing a Ifitting-type folded-sheet roofing material according To one embodiment of the present invention;

Fig. 2 is an enlarged end view of inner-side and cuter-side seam fitting parts of the abeve-menticned roof material according to the sbove-mentioned embodiment after seam joint forming:

Fig. 2 is an enlarged end view showing one modification of the inner—-aide and outer—-side seam fitting parts of the rood materials of the above-mentioned embodiment after seam joint farming;

Fig. 4 is a front view partially showing a state where the fitting-type Ifolded-sheet rocfing materials according to the embodiment of the present invention are mounted on a bracket {tight frame);

Fig. 5 1s a front view showing a fitting-typs foided-sheet roofing material according to still ancthaer embodiment of the present invention: ig. © is a front view showing a fitting-tyge folded-sheet roofing material according to still ancther embodiment of the present inventions

Fig. 7 is a front view showing a fitting-type folded-sheet roofing material according to still another ambodiment of the present invention;

Fig. 8 is a front view showing a fitting-type folded-sheet roofing material according to still another embodiment of the present invention;

Fig. 9 dis a front view showing a fitting-typsa folded-sheet roofing material according to still another embodiment of the present invention;

Fig. 1C¢ is a front view showing a fitting-type foldad-shest roofing materisl according to still another embodiment of the present invention; and

Fig. 11 is a front view showing a mode of az circular seam-bype fitting-type folded-sheet roofing material which constitutes a prior art.

Mode for Carrying Dut the Invention [00201

Hereinafter, the present invention is explained by taking a typical embodiment as an example.

A fitting-type folded-sheet roofing material according

Lo one embodiment of the present invention shown in Flg, 1 is formed by bending a metal sheet having a rectangular shape into a waveform in the widthwise direction. In the fitting-type felded-sheet roofing material, a base part 1 ls formed at a center portion of the rectangular metal sheet in the widthwise direetien, inclined side plate parts 2, 27 are contiguously formed with the base part 1 in such 2 manner that the inclined side plate parts 2, 27 are ralsed ckliguely in the upward directicn by bending from both widthwiszse edges of the base part i, horizontal parts 3, 3 are contiguously formed wiih the inclined side plate parts 2, 27 respectively in such az manner that the horizontal parts 3, 3 extend in the horizontal direction from upper end portions of the inclined side plate parte 2, 27, and an outer-seam-side fitting part 4 and an inner-seam-side fitting part 5 describad in detail later are formed by bending on respective free ends of the horizontal parts 3, 3’ respectively. [e021]

The roofing materials according to this embodiment are used for constructing roofing by a beltless constuction method as follows. The roofing materials of this enbodiment are Goined to each other one after another by fitting the cuter-side seam fitting part 4 of the other roel sheet on the inner-side seam fitting part 5 of one roof sheet from above by way of a bracket (tight frame) described later thus connecting the neighboring roof materials to each other in the widthwise direction ene after anothezx. A shape and the atructure of the roof sheet of this embodiment are explained mainly kased on a2 cross-sectional shape of the roofing material. [C0221

The characteristic constitution of the reefing material of this embodiment liss in the cross-sectional shapes of the outer-zide seam fitting part 4 and the inner-side seam fitfing part 5, and the fitting structure of these seam Titling parts at the time of seam joint forming. Firstly, the cuter-side seam fitting part 4 is explained. &sz shown in Fig. 2, the ' outer-side seam fitting part 4 is positioned at the free end portion of the horizontal part 3 which extends fromthe inclined side plate part 2 of the reef, and is formed by contigucusly connecting a right leg part 4a which constitutes a baze-part-zide leg part and is ralsed approximately upright ina state before seam joint forming is pericrmed, a dome-shaped head portion 4b which is contiguously formed with an upper end portion of the right leg part 4a, and a left leg part 4c which gonagtitutes an aedge-side leg part and extends along a leg ls

Sz of the inner-side seam fitting part 5 on extension of the head portion 40 after seam joint forming. The culer-zids seam fatting part 4 exhibits an approximately mushroom-shaped crosa-sectional shape, and covers the inner-side seam fitting part 5 in such a manner that the cuter-side seam fitting part 4 surrounds the whole inner-side seam fitting part 5. Hers, a particn (portion corresponding to 4d in Fig. 3, for example) which has a curvature different from curvature of other portions (having a radius of curvature smaller than radii of curvature of other portions) and functions as a start point of bending may be formed on a peak portion of the dome-shaped head porticn 4b in such a manner that the portion is smoothly connected with other portions (having larger radii of curvature) on both sides of the portion in the widthwise direction. 0023]

Cn the other hand, as shown in Flg, 2, the inner-side seam fitting part § iz peositicened at the free end of the norizontal part 27 extending from the inclined side plate part 27 and is constituted of the leg part Sa which is ralsed approximately upright and a crest head portion 5b which is contigucusly formed with an upper end portion of the leg part ba and exhibits BI approximately umbrella-shaped crosg-sactional zhape as az whois.

[0024]

Aocerding to the roofing material of this embodiment, as ghown in ¥ilg. 2, by covering the inner-side seam fitting part % with the outer-side seam fitting part 4 and, thereafter, py pushing down the left leg part 4c of the outer-szide seam fitting part 4 to a position indicated ky a scelid line from a pesition indicated by a dotted line, and by fastening the leg part 53 of the inner-side seam fitting part 5 positioned inside the outer-side seam fitting part 4 with the left leg part 4, the strong seam Joint forming can be acquired. [00257

That ia, according to this embodiment, even when negative pressure generated by 2 gust of wind or the like is applied to either cone of the left and right sides of the roni sheet in the direction indicated by arrows in the drawing or a push force is applied to either one of the left and right sides of the rocef sheet in the direction indicated by arrows in the drawing dus to a stepping-on action of a worker or the like, left and right bulging geortions de, 4e” formed on lower sends of the dome-shaped head portion 4b of the outer-side seam fitting part 4 and left and right bulging portions 5d, 5d7 formed on lower ends of the crest head portion 5b of the inner-side seam fitting part 5 impinge on each other so that the rotaticn of the roof sheet Is constrained wherehy it iz possible to prevent the fitting from being loosensd or disengaged.

[0026]

Here, the inner-side seam fitting part § includes a falded-back overlapping portion Sc which is formed by banding, wherein the folded-back overlapping portion So is folded back and overlapped to a lower surface of a non-leg-portion side; that is, a free end portion zide. Due to such a constitublon, the crest head portion bb can be reinforced. Accordingly, the deformation of the inner-side seam fitting gart 5 at the time of meam Joint ferming can be suppressed and hence, the inner-side seam fitting part § can enhance the accuracy in shape. further, since the tolerance (error) in original sheet width can be absorbed by the folded-back overlapping portion 5c, the inner-side seam fitting part & can always maintain the same le shape whereby the inner-side seam fitting part 5 and the outer-gide seam Fithing part 4 can be firmiy connected to sach other by fitting engagement. In forming the folded-back esverlapping portion 5c, besides the constitution where the folded-back overlapping portion 5¢ is folded back to a lowar surface side of the inner-side seam fitting part 5 as shown in Fig. 2, the folded-back overlapping portion So may be folded back to an upper surface side of the inner-side seam fitting part 5.

[0027]

Further, it is preferable that the horizontal parts 3, 37 are inclined siightly {for example, approximately 1 to 10%) downward toward the base part 1 side. This constitution can prevent the intrusion of water into the seam joint portion formed of the inner-side seam fitting part & and the vuler-side seam fitting part 4. [CD28]

Mext, Fig. 3 shows one modification of the outer-side seam fitting part 4 and the inner-side seam fitting part § of the above-mentioned embodiment. This modification is characterized in that both a right leg part 43’ and a left leg part 4’ are raised obliguely from the horizontal part 3 in the outer-side seam fitting part 4, while a leg part 5a” which is contiguously connected with a horizontal part 37 is raised obliguely in the inner-side seam fitting part 5.

Due to such a constitution, it is possible to reduce widths of portions of the sheet necessary for forming the suter-side seam fitting part 4 and the inner-side seam fitting part 5 compared with the roofing material shown in Fig. 2 where the leg parts are formed so zs to be ralsed approximately upright. Accordingly, crest heights of the roofing material from the base part 1 to peak portions of the fitting parts 4, can be increased by an amount gorresponding fo the reduced widths of the shest and hence, rigidity and strength of the whole roofing material against bending can be enhanced.

[0025]

Further, on a peak portion of the dome-shaped head portion 4b of the cuter-side seam fitting part 4, a folding

Line 4d formed of a portion having a curvature different from curvatures of other portions (having a radius of curvature smaller than radii of curvature of other portions), that is, formed of a projecting ridge perticn which functions as a start point of bending is apparently formed. By providing such a folding line 4d, a position of the outer-aside seam Litting part 4 where bending is started at the time of seam joint forming is more apparently specified thus facilitating the formation of the outer-sidges seam fitting part 4 and, at the same Time, there is no irregularities in the ridge line {ridge} and hence, the linearity is easily maintained. Further, sven when there exist irregularities in a roof bed (beammaterial} or a bracket

(tight frame) thus generating slight positional displacement of the cuter-side seam fitting part 4, it is possible to make the displacement of the passing center inconspicuous and henoe, the roofing appearance can be beautifully finished. (0030)

Further, in the same manner as the case shown in Fig, 2, with respect to the outer-side seam fitting part 4 and the inner-side seam fitting part 5, by covering the inner-gside seam fitting part 5 with the outer-side seam fitting part 4 and, thereafter, by pushing down the left leg part 42° of the ocuter-side zeam fitting part 4 te a position indicated by a solid line from a gosition indicated by a dotted line in the drawing thus fastening the leg part 5a of the inner-side sean fitting part & positioned inside the outer-side seam fitting part 4 with the left leg part 4¢7, the strong seam Joint forming can be aoguired. [00311

In the roofing material of this embodiment, basically, as ghown in Fig. 1, one or a plurality of small stepped portions

Za, 2b, 2a’, 2b" are formed on the inclined side plate parts 2, 27 which substantially support the cuter-side seam fitting part 4 and the inner-side seam flitting part 5, and bulging recessed portions Zo, Ze’ which are indented on a base part 1 side, that is, so-called “dawa” are formed on upper end portions of the inclined side plate parts 2, 2° adjacent to the horizontal parts 3, 3°. As described hereinafter, these bulging recessed portions 2¢, 2¢’ function so as Lo be engaged with pawls 7, 77 which are raised by cutting from side plates ef the bracket {tight frame} G.

[0032]

Fig. 4 shows a state whers the roofing materials of this enboediment are mounted on the bracket {tight frame) & which is fixed to the roof bed. 28 can be glearly understood from } the drawing, the roofing materials are mounted on ths bracket {tight frame} © by way of the pawls 7, 77 which are formed in a projecting manner on upper portions of both side surfaces cf the bracket (tight frame} 8. Here, the roofing materials are mounted on the bracket {tight frame) ¢ such that the base part 1 of the roefing material is dropped on a bottom portion of the bracket (tight frame} & and, at the same time, the pawls 7, 77 are engaged with the bulging recessed portions 2o, Z¢f which are formed on upper ends of the inclined side plate parts 2, 27 adjacent to the horizontal parts 3, 37. [00331

Then, thes cuter-side seam fitting part 4 of the roofing material which is constructed next is fitted on the inner-side seam fitting part 5 of the roofing material which ils mounted in advance in the above-mentioned manner such that the cuter—-side zseam fitting part 4 covers the inner-gide seam fitting part © from above. Thereafter, as shown in Fig. 2 or

Fig. 3, the right leg part 4a and the left leg part 4c of the outer-zide seam fitting part 4 are subject to the seam joint forming hy an electric seam processing machine (seamer) not ghown in the drawing. Accordingly, the outer-zide seam fitting part 4 and the inner-side seam fitting part 5 are brought into a state where the cuter-side seam fitting part 4 and the inner-zide seam fitting part & are firmly fitted with each other as indicated by a solid line in Fig. 2 ov Fig. 3.

[0034]

In the modification shown in Fig. 3, the right legigpart 4a’ and the left leg part 4¢’ of the cuter-side sezam fitting part 4 and the leg part 5a’ of the inner-side seam fitting part are formed so as te be raised chliguely. Accordingly, whan ametal sheet having a fixed original width (763mm, for example) ig used, an amcunt of the sheet material for forming the leg part is small compared with a roofing material where a leg part of the fitting part iz raised approzimately upright.

Accordingly, a crest hedlght to peak portions of the fitting parts can be increased and hence, rigidity and strength of the whole roofing material against bending can be enhanced.

FOG351

Besides the sbhove-mentioned embodiments, the present invention includes embodiments shown dn Fig. 5 to Fig. 10 with respect to the combination of the outer-side seam fitting part 4, the inner-side seam fitting part 5 and the inclined side plate parts 2, 2°. Among these embodiments, the embodiment shown in Fig. 5 1s an example of a roofing material where the outer-side seam fitting part 4 and the inner-side seam fitting part 9% shown in Fig. 2 are provided to the roofing material, and a shape of the inclined side plate part 2, Z7 includes one spall stepped portion and & bulging recessed portion 2a, Sf which is indented on a base part 1 aide at an upper end portion of the inclined side plate part 2, 27 adjacent to the horizontal part 3, 37. [00387

The embodiment shown in Fig. 6 is an example of a roofing material where a shape of the inclined side plate part 2, 27 includes two small stepped portions and a bulging recessed portion 2g, Sc which is indented on a base part 1 side al an upper end portion of the inclined side plate part 2, 27 adjacent to the herizental part 3, 37 and, at the same time, the shape of the inclined side plate part 2, 27 also includes a large stepped portion 2d, 2d° which is indented on the base part 1 side at a bending start pesition at a lower 2nd of the inclined - aside plate part 2, 8° adjacent to the base part 1. The embodiment shown in Fig. 7 is an example of 8 roofing material where the suter-side sean fitting part 4 and the inner-aide seam fitting part 5, in the example shown in Fig. &, have the structure shown in Fig. 3 where the leg parts 45°, 4¢’ of The outer~side seam fitting part 4 and a leg part 53° of the inner-side seam fitting part 5 are inclined. [00371

Fig. 8 shows an example of a roofing material where stepped portiong are not formed on the inclined side plate parts 2, 27 at all. Fig. 2 shows an example where a bulging recessed portion is not formed on the inclined side plate parts 2, 27 mut a large stepped portion 2d, 2d’ and one small stepped portion are formed on the inglined side plate parts 2, 27 at bending start positions at lower ends of the inclined side plate parts 2, 2° adjacent to the base part 1. Fig. 10 shows an ezample of 3 roofing material where the cuter-side seam fitting part 4 and the inner-side seam fitting part % shown in Fig. 3 in which the leg parts 4a”, 407, 5a’ are inclined are arranged on the inclined side plate parts 2, 27 shown in Fig. 9.

Industrial Applicability

[0038]

The roofing material according to the present invention ig applicable as roofing materials for ordinary residences, schools, garages, factories, warshousess, shops, assembly halls, gymnasiums and the like.

Description of Reference Numerals and Signs

REVERE

1: base part

2, 2% dnolined side plate pazt

Sa, a7, Bb, 2n': asmall stepped portion 2u, Zo’ yr bulging recessed pootism 2d, 247: lavges stepped partion 3. 3%: horizental past §: outer-sids ssam fitting part da, dats wight leg part dvr dome-shaped head portion db do, dof left lsg past dds folding lins de, do’: bulging portion

Sy dnber-side seam fitting part

Fa, Hat lsg part

Shia wrest head portion

Sor folded-bagk overlapping portion

Bde Sf: bulging porbions $1 bracket {tight froans)

Te TU: pawls :

Claims

Claims

[Claim 11

A fitting-type folded-shest roofing matarial comprising: a base part which forms a widthwise center portion of a rectangular metal sheet; inclined side plate parts which are raised from both widthwise edges of the bass part in respective oblique directions respectively; horizontal parts which extend in the horizontal direction from upper end portions of the inclined side plate parts respeeiively; and an innar-side seam fitting part and an cuter-side seam £ithing part which are formed upright on free edge portions of the horizontal parts respectively, neighboring metal sheats being connected to each other by way of the inpner-sideand subter-zide seam fitting parts, wherein the puber-side seam fitting part comprises: a base-part-side leg part which 13 raised from an edge periphery of the horizontal part: a dome-shaped head part which is contiguocusly formed with an upper end porticn of the bagse-part-side leg part; and a side-edge-part-zside leg part which is formed in a seam joining fitting state at a position on an extension from the dome-shaped head part thus exhibiting an approximately mushroom-shaped cross section, and the inner-sids seam fitting part comprises: a leg part which ig raised from an adge periphery of the horizontal part; and a crest head part which ig contiguously formed with an upper end portion of the leg part thus exhibiting an approximately umbrella-shaped cress section. [Claim 2° A fitting-type felded-sheet roofing material according to claim 1, wherein in the ouber-side seam flitting part, a folding line which is formed of a projecting ridge part having a different curvature iz formed on a peak portion of the dome-shaped head part.

Claim 37 A fitting-type felded-sheel roofing material according to claim 1 or 2, wherein in the inner-szide seam fitting part, a folded-back overlapped portion is formed on a non-leg-part side of the crest head part. iCiaim 47 A fitting~type folded-sheet roofing material according : te any ons of claims 1 te 3, wherein the base-part-side leg part of the cuter-side seam fitting part and the leg part of the inner-side seam fitting part are fermed so as to rises chlicuely from the edge peripheries of the respective horizontal parts respectively. [Claim 57 A fitting-type folded-sheet roofing material according to any ona of claims 1 to 4, wherein one or a plurality of small stepped portions are formed on the inclined side plate in the height direction.

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