JP2015172323A - Metallic roof material for repairing slate roof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metallic roof material having high waterproofness for repairing a slate roof.SOLUTION: A roof material main body 1 includes at least one crest part 2 constituted by a part comprising: a top plate 5 that is positioned over a crest part 4a of an existing slate roof material 4 with an interval between the top plate 5 and the crest part 4a and has a convex cross section whose center part is most swollen upward; and an inclined side 6 that leans over the top plate to mutually join a width end 5a of the top plate 5a to an edge part 3a of a trough part 3 of the roof material main body 1. Relation of 0<B/A≤0.15 is satisfied; where A is a horizontal width dimension between both width ends of the top plate 5, and B is a height dimension from a width end 5a to the center part in the width direction of the top plate 5a. Relation of 0.7≤D/C≤1.4 and relation between B/A and D/C of -15≤(D/C-1)/(B/A)≤15 are satisfied; where C is a horizontal width dimension of the inclined side 6 from the edge part 3a of the trough part 3 to a bent part 7 of the roof material main body 1, and D is a height dimension of the inclined side 6 from the trough part to the bent part of the roof material main body.

Description

  The present invention is suitable for repairing a slate roof without removing a deteriorated roof material by placing a metal roof material on an existing slate roof and covering the slate roof itself. It relates to metal roofing materials.

  A slate roof is a roof that can be lifted using a slate plate having a corrugated shape in which peaks and valleys are alternately formed along the width direction (working width direction). Because it is possible, it is widely applied to large factories, warehouses, gymnasiums, etc.

  Conventionally, when this type of roof needs to be repaired due to aging, etc., it is repaired by installing a metal roofing material having the same cross-sectional shape and covering it on the existing slate roof. As a prior art regarding this point, for example, a slate roof changing structure disclosed in Patent Document 1 is known.

  As shown in FIG. 9, the corrugated pitch structure of the corrugated slate roof plate 13 and the metal roofing material 14 is substantially equal, and the mountain portion 14a of the metal roofing material 14 has a slate roof as shown in FIG. It is made sufficiently higher than the height of the mountain portion 13a of the plate 13, and the valley portion 14b and the mountain portion 14a are formed with respect to the slate roof plate 13 to the inclined connecting portion 14c connecting the mountain portion 14a and the valley portion 14b in the metal roofing material 14. A plurality of mounting support portions 14d are formed in a valley shape so as to contact and linearly contact the metal roofing material 14 on the slate roof plate 13 at a plurality of positions spaced apart in the direction in which they are connected. In the support portion 14d, the metal roofing material 14 is mounted and supported on the slate roof plate 13, and according to this, a load is applied to a weak portion of the slate roof that is old. And avoid, and to avoid from becoming concentrated load, yet has been considered abnormal noise to thermal contraction of the metal roofing 14 after being heated by solar heat can be effectively suppressed.

Japanese Patent No. 2634549

  However, the above conventional replacement structure has the following problems. In other words, the metal roof material 14 is fixed to the roof support material 15 using a drill screw 16 that passes through the peak portion 14a of the metal roof material 14 and the slate roof plate 13 and is screwed into the roof support material 15. In that case, a washer 17 is interposed between the head of the drill screw 16 and the top surface of the peak portion 14a of the metal roofing material 14 for the purpose of preventing rainwater and the like from entering the peak portion 14a. Although the packing 18 is assembled, a gap is generated between the washer 17 or the top surface of the peak portion 14a of the metal roofing material 14 due to aged deterioration or creep deformation phenomenon of the packing 18, and the waterproof effect by the packing 18 is obtained. As a result of damage, it was often observed that rainwater or the like invades into the peak portion 14a through the peripheral portion of the drill screw 16.

  An object of the present invention is to provide a waterproof property capable of solving the conventional problems as described above that occur when a repair metal roof material placed on a slate roof is fixed to a roof support material by a drill screw. A metal roofing material for repairing high slate roofs is proposed.

The present invention is provided with a roof material body having a corrugated shape in which peaks and valleys are alternately and continuously formed along a width direction by bending a metal thin plate, and each peak portion of the roof material body Is placed on each mountain portion of the existing slate roofing material, and the valley portion is held in a mounting posture so as to be located on each valley portion of the existing slate roofing material. A peak located at one width end is fitted as an upper goby on the other metal roofing material for repairing, which is adjacently arranged as a lower goby, while an upper goze is placed at the other end of the roof. Further, a metal roofing material for repairing a slate roof that is fitted to a lower goby of another repairing metal roofing material and covers the existing slate roofing material, wherein at least one of the peaks of the roofing material body Is above the peak of the existing slate roofing material. And a top plate having a convex cross-section that is most bulged upward with the central portion in the width direction facing upward, and falls toward the top plate, and the width end of the top plate and the roof material body An inclined side connecting the edges of the valleys to each other, and the inclined sides are connected to the gently inclined sides connected to the edges of the valleys of the roofing material body and the sharp edges connected to the width edges of the top plate. A bent part is provided that divides into at least two of the inclined sides and induces elastic deformation of the inclined side itself starting from the site,
The top plate, when the horizontal width dimension between the width ends is A, and the height dimension from the width end of the top plate to the center in the width direction is B,
0 <B / A ≦ 0.15 is satisfied,
The gently sloping side has a horizontal width dimension from the edge of the valley portion of the roof material body to the bent portion as C, and a height dimension from the valley portion of the roof material body to the bent portion. If D
Satisfies the relationship 0.7 ≦ D / C ≦ 1.4, and
The relationship between B / A and D / C is
A metal roofing material for repairing a slate roof that satisfies −15 ≦ (D / C-1) / (B / A) ≦ 15.

  In the metal roofing material for repair having the above-mentioned configuration, out of the mountain part located at the width end of the roof material main body, the steeply inclined side of the mountain part that becomes the lower goby is opened outward and obliquely upward. It is preferable to provide a recessed portion having a depth of 2 mm or more, and the recessed portion is provided closer to the gently inclined side than the width end of the top plate to which the steeply inclined side and the top plate are connected. It is desirable as a concrete problem solving means.

  According to the present invention, when the drill screw is screwed in from the top surface of the peak portion, the inclined side is gradually elastically deformed starting from the bent portion, and at the same time, the top plate is also elastically deformed. And in the state where the screwing of the drill screw has been completed, the gently sloping portion of the sloping side makes surface contact along the wall surface of the mountain portion of the slate roofing material, while the top plate is stably via the steep slope portion. In this state, a high restoring force is generated on the top plate (the reaction force against the tightening force of the drill screw is large and a spring action can be applied to the top plate). The packing attached to the drill screw is strongly held between the head of the drill screw and the top plate due to the high restoring force generated on the top plate, and as a result, the waterproofness of the repair metal roofing material is long. It will be maintained in a high state over a period (high effect of closing the gap of the packing).

  According to this invention, it has the depth of 2 mm or more opened to the steep slope side of the mountain part which becomes a lower goby among the mountain parts located at the width end of the roof material main body, and obliquely upward. Since the concave portion is provided, even if rainwater or the like enters by the osmotic pressure in the overlapping portion with the upper goby of the repairing metal roof that is disposed adjacent to the roof, the penetration of the rainwater or the like can be blocked in the concave portion.

  Further, according to the present invention, the concave portion is provided closer to the inclined side than the width end of the top plate where the steeply inclined side and the top plate are connected. Property) can be maintained well, and it is easy to match the core (straight line passing through the center in the width direction), the adhesion of the upper goby and the lower goby is improved, and the waterproof property is improved. Can do.

It is the figure (front view) which showed typically the whole metal roof material for repair of the slate roof according to this invention along the width direction. It is the figure which expanded and showed one peak part (lower goby) of the metal roof material for repair shown in FIG. It is the figure which showed the fixation condition of the metal roof material for repair shown in FIG. It is the figure which showed the deformation | transformation condition of the top face of a mountain part. It is explanatory drawing of the fixation condition of the metal roof material for repair according to this invention. It is explanatory drawing of the fixation condition of the metal roof material for repair according to this invention. It is explanatory drawing of the fitting condition of a lower goby and an upper goby. It is explanatory drawing of the fitting condition of a lower goby and an upper goby. It is the figure which showed typically the fixation structure of the conventional metal roofing material. It is the figure which showed typically the principal part of the other examples of the metal roof material for repair of the slate roof according to this invention. It is the figure (front view) which showed typically one mountain part (lower goby) of the metal roofing material for repair of the slate roof used in the comparative example 1 along the width direction. It is the figure (front view) which showed typically one mountain part (lower goby) of the metal roofing material for repair of the slate roof roof used in the comparative example 2 along the width direction. It is the figure (front view) which showed typically one mountain part (lower goby) of the metal roofing material for repair of the slate roof roof used in the comparative example 3 along the width direction.

Hereinafter, the present invention will be described more specifically with reference to the drawings.
FIG. 1 is a front view schematically showing the entire metal roofing material for repairing a slate roof according to the present invention along the width direction (direction of working width), and FIG. 2 is shown in FIG. One roof of a repair metal roof material, in particular, one of the width ends of the roof material body, and the other roof of the repair metal roof material that is placed next to each other to fit the roof material together It is the figure which expanded and showed the lower goby to match. Here, the other repair metal roofing material arranged adjacently refers to one having the same configuration as the repair metal roofing material according to the present invention.

  Reference numeral 1 in the figure denotes a roof material body constituting a repair metal roof material. This roof material main body 1 has a corrugated shape in which a metal thin plate is subjected to a bending process, and mountain portions 2 and valley portions 3 are alternately and continuously formed along the width direction. Reference numeral 4 denotes an existing slate roof material that is repaired by arranging a repair metal roof material according to the present invention. The roof material main body 1 is set to a pitch (corrugated pitch) equivalent to the peak portions 4 a and valley portions 4 b of the existing slate roof material 4.

  At least one of the peaks 2 of the roofing material body 1 is enlarged in its main part, as shown in FIG. 2, and is located above the peak 4a of the existing slate roofing material with a gap in the middle in the width direction. A top plate 5 having a convex cross-section (arc shape) that is most bulged upward, and falls down toward the top plate 5, the width end 5 a of the top plate 5, and a trough of the roof material body 1. 3 and the inclined side 6 which connects the 3 edge part 3a mutually.

  When the top plate 5 is pressed from the upper surface when the drill screw is tightened, the top plate 5 is elastically deformable. When the horizontal width dimension between the width ends is A and the height dimension is B, The relationship 0 <B / A ≦ 0.15 is satisfied.

  Further, the inclined side 6 is divided into at least two of the inclined side 6, that is, a gently inclined side 6 a connected to the edge 3 a of the valley 3 of the roof material body 1 and a steeply inclined side 6 b connected to the width end 5 a of the top plate 5. And the inclined side 6 itself can be deformed (elastically deformed) starting from the bent portion 7 when pressed from the upper surface when the drill screw is tightened. The horizontal width dimension from the edge portion 3a of the valley portion 3 of the roof material body 1 to the bent portion 7 is C, and the height dimension, that is, the valley portion 3 of the roof material body 1 is extended to the bent portion 7. When the distance to is D, the relationship of 0.7 ≦ D / C ≦ 1.4 is satisfied. The B / A of the top plate 5 and the D / C relation of the inclined side 6 are set so as to satisfy the relationship of −15 ≦ (D / C−1) / (B / A) ≦ 15. Yes.

  The metal roofing material for repair having such a structure has each mountain part 2 of the roofing material body 1 positioned on each mountain part 4a of the existing slate roofing material 4, and each valley part 3 is already provided. The slate roofing material 4 is held in a mounting posture that is positioned on each valley 4b, and, as shown in FIG. 2a is fitted to the upper goby 5 of another adjacent repair metal roof material, while the mountain portion 2 located at the other width end of the roof material main body 1 is used as the upper gob 2b so as to be adjacently disposed. Further, after the existing slate roofing material 4 is covered with the lower goby of another metal roof material for repair, the drill screw 10 assembled with the washer 8 and the packing 9 is further connected to the upper goby 2b and the lower goze. Tighten from the top surface of the fitting part (overlapping part) with 2a The peak 4a of the existing slate roofing material 4 is penetrated and fixed to the roof support member 11. At this time, the peaks (lower goby 2a, upper goby 2b) where the drill screw 10 is tightened start from the bent portion 7. As a result of the deformation of the inclined side 6, the gently inclined side 6 a comes into surface contact along the wall surface of the mountain portion 4 a of the existing slate roof material 4, and the top plate 5 is supported via the steeply inclined side 6 b in an elastically deformed state. Is done. In this state, since the reaction force against the tightening force of the drill screw 10 is increased, an effective spring action (restoring force) is applied to the top plate 5, and the packing 9 is attached to the drill screw 10. It is strongly clamped between the head and the top plate 5 (waterproofness is enhanced).

  In the present invention, when the horizontal width dimension between the width ends of the top panel 5 is A and the height dimension is B in the top panel 5, 0 <B / A ≦ 0.15. Is as follows.

  That is, when B / A is 0 <B / A, as shown in FIG. 4, when the metal roofing material is fixed to the drill screw 10, the top surface of the peak portion 2 is dent-deformed and rainwater or the like is generated. This is because it tends to collect and is disadvantageous in terms of waterproofness. On the other hand, when B / A is B / A> 0.15, the top surface of the peak portion 2 projects greatly upward, so that the drill screw 10 This is because the workability when tightening is deteriorated.

  In the present invention, for the inclined side 6, the horizontal width dimension from the edge 3 a of the valley portion 3 of the roof material body 1 to the bent portion 7 is C, and the height dimension, that is, the roof material body 1. When the distance from the trough 3 to the bent portion 7 is D, the relationship of 0.7 ≦ D / C ≦ 1.4 is satisfied. The reason is as follows.

  That is, when D / C is 0.7 <D / C or D / C> 1.4, when the metal roofing material is fixed to the existing slate roofing material 4, the gently inclined side 6 a is set to the existing slate. Since it becomes difficult to make surface contact with the wall surface of the peak portion 4a of the roofing material 4, it becomes difficult to obtain a stable supporting force (reaction force against the tightening force of the drill screw 10) from the existing slate roofing material 4, and thus the top plate This is because it is feared that the spring action at 5 cannot be expected and the clamping force of the packing 9 cannot be increased.

  5 and 6 are views schematically showing the state of the metal roof material according to the present invention before the drill screw 10 is tightened and after the tightening is completed.

  The inclination angle of the wall surface of the peak portion 4a of the existing slate roofing material 4 is generally about 45 °, and the inclination angle of the gently inclined side 6a of the inclined side 6 is 45 ° (D / C = 1.0). If this is the case, when the metal roofing material is placed on the existing slate roofing material 4, the gently inclined side 6a comes into surface contact with the wall surface of the mountain portion 4a, and there is no particular problem. However, at other inclination angles, the metal roofing material is merely placed on the existing slate roofing material 4 but does not come into surface contact although it makes line contact.

  Also in the metal roofing material of the present invention, the inclination angle of the gently inclined side 6a is 35 ° (D / C = 0.7) or 55 ° (D / C = 1.4) having an angle difference of 10 °, for example. In this case, when the metal roofing material is placed on the slate roofing material 4, it is only in line contact, but D / C satisfies the relationship of 0.7 ≦ D / C ≦ 1.4. In this case, the gently sloping side 6a is directed toward the wall surface of the mountain portion 4a of the existing slate roof material 4 by tightening the drill screw 10 after the metal roof material is placed on the existing slate roof material 4. Will gradually deform and come into surface contact.

  In particular, in the case shown in FIG. 5, when the metal roofing material is placed on the slate roofing material, the bent portion 7 (a in the drawing) makes a line contact with the mountain portion 4a of the existing slate roofing material 4. However, as the drill screw 10 is tightened, the bent portion 7 slides along the wall surface of the peak portion 4a, and the lower end of the gently inclined side 6a (valley portion 3 wide end, a in the figure) is the peak portion 4a. Contact with the wall surface to surface contact.

  Moreover, in what is shown in FIG. 6, at the time of placing a metal house material on the existing slate roof material 4, the lower end (b in the figure) of the gently inclined side 6a is only in line contact, As the drill screw 10 is tightened, the bent portion 7 moves toward the wall surface of the peak portion 4a, and the bent portion 7 (a in the figure) comes into contact with the wall surface to come into surface contact. At this time, the trough 3 does not shrink in the width direction, and the elastic deformation of the top plate 5 (deformation causing a spring action) proceeds simultaneously with the deformation of the inclined side 6.

  In order to bring the inclined side 6 into surface contact with the wall surface of the peak portion 4a of the existing slate roofing material 4 to stably support the top plate 5 and to effectively exert the spring action accompanying the elastic deformation of the top plate 5, In addition to these two conditions, as condition 3, the relationship between B / A of the top plate 5 and D / C of the inclined side 6 is set to −15 ≦ (D / C−1) / (B / A) ≦ 15. It is important.

  Here, as the condition 3, the reason why the relationship between the B / A of the top 5 and the D / C of the inclined side 6 is −15 ≦ (D / C−1) / (B / A) ≦ 15 is as follows. It is as follows.

  When the tightening of the drill screw 10 is started, the top plate 5 is gradually deformed in the flattening direction, while the gently inclined side 6a is deformed from the line contact state to the surface contact direction. become. Such deformation proceeds at the same time as if the series springs were shrunk, but the degree of swelling of the top plate 5 was originally small in the simultaneous deformation of the top plate 5 and the gently inclined side 6a (close to flat) ) And the top plate 5 may become flat before the gently sloping side 6a comes into surface contact with the wall surface of the ridge 4a of the slate roofing material 4 (this tendency is caused by the angle of the sloping side 6a being the slate). In this case, the gently sloping side 6a has to be in line contact and is in surface contact with the inclination angle (usually about 45 °) of the wall surface of the mountain portion 4a of the roofing material 4). Unlike the case, a stable spring action cannot be exhibited.

  In order to exert a stable spring action on the top plate 5, the gently inclined side 6a is in surface contact and the top plate 5 is kept bulging upward (not flattened). Is particularly important. In the present invention, the relationship between B / A of the top plate 5 and D / C of the inclined side 6 is set to −15 ≦ (D / C−1) / (B / A) ≦ 15 (The value of D / C-1 increases as the angle of the gently inclined side 6a deviates from the inclination angle of the wall surface of the peak portion 4a of the slate roofing material 4, and the degree of swelling of the top plate 5 decreases. The value of B / A becomes smaller.

  The peak portion 2 that satisfies the above three conditions is applied to the peak portion 2 that fastens the drill screw 10 and fixes the metal roofing material to the existing slate roofing material 4. The present invention can be applied not only to the peak 2 that becomes the upper goby 2b but also to other peaks 2 located between the lower goby 2a to the upper goby 2b.

  In particular, when the mountain portion 2 is applied as the lower goby 2a, the steeply inclined side 6b of the inclined side 6 (the inclined side 6 on the opposite width end side) corresponding to the inclined side 6 on the wide end side of the upper goby 2b. In addition, a recess 12 having a depth (t) of 2 mm or more opened outward and obliquely upward may be provided (see FIGS. 2 and 3). As a result, even if rainwater or the like enters due to osmotic pressure from the overlapping portion of the metal roofing material adjacent to the upper goby 2b, the entry of rainwater or the like can be prevented in the recess 12. The depth (t) is orthogonal to the reference straight line when a straight line (virtual line) parallel to the outer surface of the steeply inclined side 6b is used as a reference, as shown in FIG. The straight line dimension (maximum dimension) from the reference to the bottom wall of the recess 12 is assumed. In addition, although the recessed part 12 showed as an example what made the cross-sectional shape the substantially trapezoid shape, the cross-sectional shape can be changed into various shapes, and is not limited to the thing of illustration. The side wall of the recess 12 on the side of the gently inclined side 6a is preferably provided with an inclination so that the outer side is lower than the inner side with respect to the horizontal plane. Even if it is discharged quickly.

Further, in providing the concave portion 12, it is preferable that the concave portion 12 is provided closer to the gently inclined side 6a than the width end 5a of the top plate 5 to which the steeply inclined side 6b and the top plate 5 are connected. This is because, in the structure as shown in FIG. 7 in which the recess 12 and the top plate 5 are continuous, depending on the construction situation, as shown in FIG. 8, the core L of the upper goby 2b and the lower goby 2a are as shown in FIG. core L ₁ is may be fixed with a shift, or could not be the depth t of the recess 12 and above 2 mm, curling the ends of the upper goby 2b go bankrupt or under goby 2a,, upper goby This is because the adhesion of 2b is deteriorated, and as a result, the waterproofness of the overlapped portion may be impaired. By providing the recess 12 closer to the gently inclined side 6a than the width end 5a of the top plate 5 where the steeply inclined side 6b and the top plate 5 are connected, the fitting property (overlapping property) of the upper goby 2b and the lower goby 2a is good. it is possible to maintain, the base line L, it is easy to match the L _1, resulting adhesion of the upper goby 2b and the lower goby 2a is improved as, contribute to the improvement of waterproof overlapping portions .

  The number of peaks 2 and valleys 3 is arbitrarily set according to the working width and length, and is not limited to the illustrated one.

  As a metal roof material for repair applied to the present invention, a thickness of 0.4 to 1.0 mm, for example, a rust-proof steel plate such as a hot dip galvanized steel plate or a color steel plate, a stainless steel plate, a copper plate, an aluminum alloy plate, What consists of a fixed member shape | molded by roll forming can apply a zinc plate etc.

  FIG. 10 shows another example in which the steeply inclined side 6b is partially changed to a substantially V shape (or a substantially inverted L shape) when the recess 12 is provided (the depth t is a gently inclined side). 6a side is the deepest) Even in the concave portion 12 having such a shape, even when rainwater or the like invades from the overlapped portion by osmotic pressure in the overlap with the upper goby 2b of the adjacent metal roofing material, Intrusion can be prevented. In particular, the one having such a cross-sectional shape has an advantage that the roof material can be easily manufactured because the shape can be simplified, and the roof material can be efficiently manufactured.

  When repairing an existing slate roofing material (tilt angle 45 °) using a repairing metal roofing material that satisfies all three conditions defined in the present invention (Example 1: shape shown in FIG. 2) (T = 2 mm), Example 2: The shape shown in FIG. 10 (t = 2 mm)) and a repairing metal roof material that does not satisfy any one of the conditions defined in the present invention. When repairing the slate roofing material (Comparative Example 1: having the shape of FIG. 11 (t = 2 mm), Comparative Example 2: having the shape of FIG. 12 (t = 2 mm), Comparative Example 3: having the shape of FIG. The thing (t = 2mm)) was investigated about the waterproofness of the periphery of the drill screw, workability, supportability of the top plate, and spring property of the top plate. In addition, regarding waterproofness, it compared by the index display when the waterproofness of the metal roofing material according to this invention is set to 100. The results are shown in Table 1.

  Comparative Example 1 is a case where an existing slate roofing material is repaired using a repairing metal roofing material having a large degree of bulging upward of the top plate. In Comparative Example 1, when fixing the repairing metal roofing material to the existing slate roofing material with a drill screw, the screw tip tends to slip sideways, so that the workability is poor, and the screw hole expands with the side slipping. Since it is unavoidable, it was confirmed that the waterproofness is likely to be lowered.

  Moreover, the comparative example 2 is a case where the existing slate roofing material is repaired using a repairing metal roofing material provided with a mountain part whose angle with respect to the horizontal plane of the gently inclined side is 65 °. In Comparative Example 2, even if the drill screw is tightened with a predetermined tightening amount and the repairing metal roofing material is fixed to the existing slate roofing material, as shown by the broken line in FIG. Therefore, the stable support necessary for the spring action on the top plate cannot be performed, and when aged deterioration of the packing, creep deformation phenomenon of the metal roofing material, etc. occurs, a gap is easily formed in the part where the packing is attached It was confirmed that stable waterproofness could not be secured.

  Furthermore, the comparative example 3 is a case where the existing slate roofing material is repaired using a repairing metal roofing material having an angle of 35 ° with respect to the horizontal plane of the gently inclined side. In Comparative Example 3, the value of (D / C-1) / (B / A) is 15 although the gently sloping side is in surface contact with the wall surface of the slate roof material peak when the drill screw is tightened. Therefore, it was confirmed that the elastic deformation of the top plate is small, the packing of the packing by the spring action is not sufficient, and stable waterproofness cannot be secured over a long period of time.

  ADVANTAGE OF THE INVENTION According to this invention, the metal roof material for repair of a highly waterproof slate roof can be provided.

DESCRIPTION OF SYMBOLS 1 Roof material main body 2 Mountain part 3 Valley part 4 Existing slate roof material 4a Mountain part 4b Valley part 5 Top plate 5a Width end 6 Inclined side 6a Slightly inclined side 6b Steeply inclined side 7 Bending part 8 Washer 9 Packing 10 Drill screw 11 Roof support member 12 Recess 13 Slate roof plate 13a Mountain portion 14 Metal roofing material 14a Mountain portion 14b Valley portion 14c Inclined connection portion 14d Mounting support portion 15 Roof support material 16 Drill screw 17 Washer 18 Packing

Claims (3)

It comprises a roof material body having a corrugated shape in which peaks and valleys are alternately and continuously formed along the width direction by bending a thin metal plate, and each peak portion of the roof material body is provided with an existing Each of the roof material main bodies is positioned on each mountain portion of the slate roofing material and held in a mounting posture in which the valley portion is located on each valley portion of the existing slate roofing material. The peak located at the width end of the other is used as the lower goby and fitted to the upper goby of the other repair metal roofing material adjacent to this, while the peak located at the other wide end is used as the upper goby. A metal roofing material for repairing a slate roof that is fitted to a lower goby of another repairing metal roofing material arranged adjacently and covers the existing slate roofing material,
At least one of the peak portions of the roof material main body is located above the peak portion of the existing slate roof material at a distance, and has a convex cross section that is most bulged upward in the center in the width direction. A sloping side that falls down toward the top plate and interconnects the width end of the top plate and the edge of the valley of the roof material body,
The inclined side is divided into at least two of a gently inclined side connected to the edge of the valley portion of the roof material main body and a steeply inclined side connected to the width end of the top plate. Provide a bent part that enables the deformation of the inclined side itself,
When the horizontal width dimension between the width ends is A and the height dimension is B,
0 <B / A ≦ 0.15 is satisfied,
The gentle slope side, when the horizontal width dimension from the edge of the valley part of the roof material body to the bent part is C and the height dimension is D,
Satisfies the relationship 0.7 ≦ D / C ≦ 1.4, and
The relationship between B / A and D / C is
−15 ≦ (D / C-1) / (B / A) ≦ 15 A metal roofing material for repairing a slate roof roof, which satisfies the following condition.   Among the ridges located at the width end of the roof material main body, the steeply inclined side of the ridge that becomes the lower goby has a recess having a depth of 2 mm or more opened outward and obliquely upward. The metal roofing material for repairing a slate roof according to claim 1.   3. The slate roof of claim 2, wherein the concave portion is provided closer to the gently inclined side than a width end of the top plate to which the steeply inclined side and the top plate are connected. Metal roofing material for repair.

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