JP2010037908A - Folded metal sheet for roof and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and inexpensively manufacture a folded metal sheet for a roof while sufficiently securing the waterproofness of the overlapped parts of folded metal sheets when the folded sheets are vertically arranged in the longitudinal direction. <P>SOLUTION: In this folded sheet 1A for a roof, a steel strip having a thickness of 0.6 to 1.2 mm is formed by crest-folding and valley-folding through folding lines in the longitudinal direction, flat surfaces 11, 11 at the crest parts and a flat surface 12 at the bottom part are joined to each other through inclined surfaces 13, 13 in the lateral direction so as to be formed in a generally bottomed V-shape in cross section, and the bent angles of the inclined surfaces relative to each flat surface are 40-80°. A plurality of steel strips are arranged parallel to one another in the lateral direction and overlapped with each other within a predetermined range on the short side, and a plurality of steel strips are arranged parallel to one another in the longitudinal direction. A waterproof structure 2A formed by longitudinally and continuously arranging ribs 20 extending in the lateral direction is provided to at least one of the short sides overlapped with each other. The vertical difference between the crest part and the bottom part of the continuous rib 20 is 0.5-3.0 mm. By the height difference, the occurrence of capillary phenomenon in the space formed at the overlapped portion is avoided to prevent rainwater from intruding into the roof. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a folded sheet for roof and a method for manufacturing the same, and in particular, a strip-shaped steel sheet having a uniform width is formed into a substantially V-shaped cross section by combining valley folds and mountain folds along a fold line along the longitudinal direction. And a method of manufacturing the same, and a method for manufacturing the folded plate for roofing, which is used for hoisting a relatively large roof, arranged in a plurality of columns in the longitudinal direction while being arranged in parallel in the width direction in a state in which the longitudinal direction coincides with the inclined direction. .

  When roofing a relatively large building, folding plates for roofs, which are formed continuously in the longitudinal direction while folding a strip-shaped steel sheet into a V-shaped cross section with a roll forming machine, have become widespread. ing. For example, when a large roof having a width of several tens of meters is used in a shopping center, a large-scale factory, a large warehouse, or the like, the length of one folded sheet for roof may reach 80 meters or more.

  When using such a long roof folding plate, a roll molding machine is installed near the building (ground molding) or on a scaffold assembled to the height of the building (stage molding). Thus, it is common to create a folded sheet for roof having a required length on the spot by roll forming. However, for example, in the case of renovation work that repairs the roof of a facility that is operating, in the ground molding, a folded plate for roofs in the unit of several tens of meters is created while performing roll forming work in a parking lot adjacent to this. Since it will be unloaded by a crane and stage molding will assemble a relatively large scaffold for mounting a roll molding machine, it is often difficult to implement from the viewpoint of ensuring safety and ensuring space. Also, the work itself of spreading a long and heavy roof folded plate on the roof itself is likely to cause a rise in construction cost because it requires a lot of manpower and labor at one time.

  In view of this, attempts have been made to use a plurality of relatively short folded roof plates (fixed folded plates) in a longitudinal direction. However, since overlapping portions of folded plates are generated in order to be provided continuously in the longitudinal direction, it is not easy to sufficiently secure rain dizziness (measures against water leakage) in the overlapping portions.

  For example, in such overlapping portions, it is known that rainwater rises from the water side toward the water side due to a capillary phenomenon generated by a gap between the folded plates and easily enters the roof. Moreover, even when seal-like caulking is applied to this part, after deterioration due to aging, water is likely to enter as in the above case, and the invaded water tends to accumulate inside, and the repair becomes extremely difficult. It will be.

  On the other hand, as described in Japanese Patent Application Laid-Open Nos. 58-17793 and 62-148754, a plurality of strips projecting upward from the overlapping portion in the longitudinal direction as in the folded plate for roof 1D shown in FIG. The one having the ribs 25 and 26 formed thereon is known. With the folded plate having such a configuration, the ribs 25 and 26 act as weirs against water intrusion at the overlapping portion, and a space can be created between the upper and lower folded plates to avoid the occurrence of capillary action. .

By adopting a construction method in which such roof folding plates (fixed folding plates) 1D are provided continuously in the inclined direction, it becomes easy to achieve both rain and workability. However, the folded roof plate with such a structure requires a press molding machine with a dedicated mold to provide a structure for water leakage prevention (waterproof structure) including its ribs. Since this is not possible, the manufacturing cost tends to be high.
Japanese Patent Application Laid-Open No. 58-17793 JP 62-148754 A

  The present invention is intended to solve the above-mentioned problems, and it is possible to reduce the cost while ensuring sufficient waterproofness of the overlapping portion when arranging the folded plates for roof in tandem in the longitudinal direction. It is an object of the present invention to make it easy to manufacture.

  Therefore, the present invention combines a strip-shaped steel sheet having a thickness of 0.6 mm to 1.2 mm with valley folds and mountain folds along a fold line along the longitudinal direction, so that the top plane and the bottom plane are inclined surfaces in the width direction. The cross-sectional shape by a plane perpendicular to the longitudinal direction is formed in a substantially bottomed V shape, and the rising angle and the falling angle (bending angle) from each plane to the inclined surface are 40 ° to 80 °, respectively. In the folded roof plate arranged in a plurality of columns in the longitudinal direction while overlapping a predetermined range on the short side while being arranged in parallel in the width direction, at least one of the overlapping short side, It has a waterproof structure in which a plurality of rib-shaped ribs extending in the width direction are continuously arranged in the longitudinal direction, and the height difference between the top and bottom of the continuous ribs is 0.5 mm to 3.0 mm. The sky formed in the overlapping part due to the difference It was characterized by preventing the occurrence of capillarity and preventing rainwater from entering the roof.

  As described above, the waterproof structure provided in the overlapping portion in the longitudinal direction of the folded sheet for roof is provided by continuously forming a plurality of ribs extending in the longitudinal direction in the longitudinal direction, so that only the roll forming process is relatively easy. In addition to being able to be manufactured, a high waterproof function can be exhibited without sealing the overlapping portion.

  Further, in this case, the waterproof structure is provided in a zigzag longitudinal section by a plurality of ribs continuously formed in the longitudinal direction by repeating valley folds and mountain folds along a fold line along the width direction of the strip steel plate. If it features, the space for avoiding a capillary phenomenon between ribs will be formed reliably.

  Furthermore, in the folded plate for roof described above, if the pitch of the continuously formed ribs is 8.0 mm to 22.0 mm, the cross-sectionally bottomed V-shape is formed after the waterproof structure of the rib is formed. In the case of bending, deformation of the ribs can be minimized, and a waterproof function can be easily secured in a space formed by the interval. Furthermore, in the above-mentioned folded plate for roof, if the total width in the longitudinal direction by the ribs of the waterproof structure is 200.0 mm or more, all rainwater will be discharged even if there is strong blowing due to bad conditions such as typhoons. It becomes difficult to exceed the ribs, and the function of preventing rainwater from entering is surely easily performed.

  In addition, in the method for manufacturing a folded sheet for roof that is continuously formed in the longitudinal direction by roll forming from a strip-shaped steel plate using a roll forming machine provided with a plurality of press-fitting means in the longitudinal direction, the plurality of strips are first preceded on the upstream side. After forming the ribs in a predetermined range in the longitudinal direction and providing a waterproof structure, the above-described method for producing a folded plate for roof is characterized in that it is formed into a substantially bottomed V-shaped cross section on the downstream side. The above-described folded plate for roof can be easily produced in a short time using only a roll molding machine without using a press molding machine.

  According to the present invention in which a plurality of ribs extending in the width direction are continuously arranged in the longitudinal direction to form a waterproof structure in the overlapped portion, the waterproofness of the overlapped portion can be sufficiently ensured when arranged in tandem in the longitudinal direction, and It can be easily manufactured at low cost.

  The best mode for carrying out the present invention will be described below with reference to the drawings. In the following embodiments, the folded plate for roof is of a type that is arranged in a state in which the longitudinal direction thereof coincides with the inclination direction of the roof from the water surface to the water surface.

  FIG. 1 is a partial perspective view of a folded roof plate 1A according to the first embodiment of the present invention. The folded plate for roof 1A is used for lifting a roof having a relatively large area, and a plurality of roof folded plates 1A are arranged in the width direction while overlapping a predetermined range on the long side (left and right ends), and short. A plurality of ridged ribs that are arranged in a row in the longitudinal direction while overlapping a predetermined range on the side (upper and lower ends) side, and that have the same height in the width direction in the predetermined range of the longitudinal direction overlapping portion A feature is that a plurality of strips 20 are continuously provided in the longitudinal direction to form a rippled waterproof structure 2A that exhibits the function of preventing the intrusion of rainwater.

  This folding plate for roof 1A is a combination of valley folds and mountain folds of a strip-shaped steel plate having a predetermined width that has been subjected to a predetermined surface treatment to provide weather resistance and the like, with six fold lines along the longitudinal direction. By roll forming, the top flat surfaces 11 and 11 and the wider bottom flat surface 12 are continuous in the width direction with the inclined surfaces 13 and 13 wider than these, and the top flat surfaces 11 and 11 Narrower and lower inclined surfaces 14 and 14 are formed from both ends, respectively, and the cross-sectional shape of the surface perpendicular to the longitudinal direction forms a substantially bottomed V-shape.

  Further, the folded sheet for roof 1A has a rising angle and a falling angle (bending angle) of the inclined surfaces 13 and 14 from the flat surfaces 11 and 12, respectively in the range of 40 ° to 80 °, and the thickness of the steel plate to be used. Is recommended to be in the range of 0.6 mm to 1.2 mm. That is, by doing in this way, the shape strength and economical efficiency required as a roofing material are realized, and such a configuration substantially matches the standard range of folded roof plates.

  The waterproof structure 2A, which is a characteristic part of the folding plate for roof 1A of the present embodiment, has a valley formed by folding lines extending in the width direction on the side below the overlapping folded plate end portions arranged in the longitudinal direction. While the plurality of ribs 20, 20, 20,..., Which are continuously folded and mountain-folded, form a predetermined height difference between the bottom of the continuous valley and the top of the mountain, It is provided in a predetermined range in a ripple shape with a predetermined pitch in the longitudinal direction.

  Referring to FIG. 3 showing an enlarged end view when the waterproof structure 2A is longitudinally cut in the longitudinal direction, the waterproof structure 2A has a plurality of ribs 20 formed by bending a strip-shaped steel plate into a zigzag longitudinal section as described above. Are formed continuously. The height difference H between the top of the ridges and the bottom of the valleys of each rib 20 is related to the thickness (0.6 mm to 1.2 mm) of the strip steel plate to ensure the waterproof function and facilitate roll forming. From the viewpoint of coexistence with the above, it is preferable that the thickness be in the range of 0.5 mm to 3.0 mm.

  In addition, the pitch P of the continuous ribs 20 and 20 is set to 8.0 mm to 22.0 mm from the viewpoint of ensuring the depth of the valley and the space area that do not cause capillary action even when deformation due to the elasticity of the steel plate occurs. It is preferable. Further, in the waterproof structure 2A composed of the plurality of ribs 20 as described above, if the total width in the longitudinal direction by the continuous ribs 20 is at least 200.0 mm or more and continues to the plane part 30, a typhoon Even under severe wind and rain conditions such as the above, sufficient waterproofness can be exhibited. In addition, the range of each size which comprises the folding plate 1A for roof of this Embodiment mentioned above was clarified as conditions which can exhibit a preferable effect from the result of this inventor carrying out the experiment of various patterns. Is.

  FIG. 4 shows a state in which the flat portion 30 of the folded roof plate 1A on the water side is superimposed on the portion of the waterproof structure 2A of FIG. 3 from above, and FIG. 5 shows a partially enlarged view thereof. As can be seen from these drawings, the crests of the plurality of continuous ribs 20 are in point contact with the flat portion 30, and the space 100 is formed between the flat portion 30 and the ribs 20 and the ribs 20. Is formed.

  The presence of the space 100 prevents the capillary phenomenon from occurring and makes it difficult for water that has entered from the water side to move upward. That is, such a space 100 is continuously formed in the longitudinal direction, so that rainwater can be effectively prevented from entering the roof. Although FIG. 6 shows the case where the waterproof structure 2A is stacked on the upper side, the same operation and effect as described above can be expected even in this way. However, when superposed in this way, the water that flows down the top surface of the folded folding plate 1A is likely to stagnate by the ribs 20 and dirt and dust are likely to accumulate, so the superposition method of FIG. 4 is generally recommended. Is done.

  FIG. 2 shows a roof folded plate 1B as a second embodiment of the present invention. The folded plate for roof 1B according to the present embodiment has substantially the same configuration as the folded plate for roof 1A described above. As a difference, a predetermined number of ribs 20 are continuously provided in the waterproof structure 2B, and then a predetermined width on the water side. The flat portion 33 is disposed, and a predetermined number of continuous ribs 20 are disposed again under the water (the flat portion 32 having a predetermined width is also provided on the edge in the longitudinal direction), and The total width in the longitudinal direction of the plurality of ribs 20 is 200.0 mm or more. And the waterproof function similar to the folding plate 1A for roofs mentioned above can be exhibited also by the folding plate 1B for roofs of 2nd Embodiment provided with such a waterproof structure 2B.

  FIG. 7 shows a partial end view of a folded roof plate 1C as an application example common to the first embodiment and the second embodiment. This waterproof structure 2C is formed by molding a curved line formed by rounding the top of the mountain and the corner of the bottom of the valley in a longitudinal cross-sectional shape into a rippled shape. Thus, even when the waterproof structure 2C is formed by the ribs 21 having no corners at the tops, substantially the same operations and effects as those of the above-described embodiment can be expected. However, the height difference H of the folded plate for roof 1C is likely to be reduced by the amount that the top and bottom corners are rounded off.

  FIG. 8 shows a simplified layout for explaining a manufacturing method common to the folded sheets for roof 1A, 1B, 1C shown in FIGS. By carrying out this manufacturing method, it is characterized in that it can be manufactured only by a roll forming process similar to that of a normal roof folded plate. That is, the strip-shaped steel sheet 50 wound in a roll shape is formed into a substantially V-shaped cross section by pressing means 120, 120, 120,... Composed of a plurality of rollers arranged in the longitudinal direction of the roller molding machine 100. However, in the previous stage (upstream side), it is pushed out while being sandwiched by pressing means 110 comprising a pair of upper and lower rib rollers 111, 111 for molding the rib. After forming a waterproof structure in a predetermined range in the longitudinal direction (see FIG. 9), the space between both rib rollers 111, 111 is widened so that the upstream side is pushed out in a flat portion without ribs (see FIG. 9). 10)).

  And each part of waterproof structure 2A, 2B, 2C formed in this way is also formed into a folded plate having a substantially bottomed V-shaped cross section on the downstream side. Molding is performed smoothly without any wrinkles and breakage, and the bent portion can be finished relatively cleanly. In addition, since the roof folded plates 1A, 1B, and 1C are created only by a series of molding processes by one roll molding machine, a pressing process by a press molding machine is not required separately, and Since it is relatively easy to add the press-fitting means 110 for forming the rib to a general-purpose roll forming machine, the manufacturing cost of the folded plate can be kept low. In the embodiment described above, the folding plate for roof has been described as a type in which a plurality of side plates are arranged in parallel in the lateral direction while overlapping a predetermined range of the long side (left and right ends). Needless to say, even if the sides engage with each other, they are the same as described above.

  Next, the folded sheet for roof of the present invention will be described in more detail with reference to examples (test examples).

  FIG. 11 shows a longitudinal sectional view of a folded roof plate (test example) as a test object, which is created in the same manner as the folded roof plate 1A in the first embodiment described above, in the width direction. The strip steel plate to be formed is a 0.6 mm thick galvalume steel plate (molten 55% Al-Zn alloy-plated steel plate, manufactured by Yodokou), and the pitch of large crests in the width direction (space between bolt holes) is 500.0 mm. The width of both left and right planes is 70.0 mm, the width of the bottom plane is 150.0 mm, the width of both right and left inclined surfaces rising from the bottom plane is 198.0 mm, both inclined surfaces falling left and right from the left and right planes of the top The width was 39.0 mm, the falling angle and rising angle from each plane were 45 °, and the size was 1000.0 mm in the longitudinal direction. In addition, the rib of the waterproof structure was continuously provided in the longitudinal direction of the steel plate with a pitch P of 10.0 mm and a peak height H of 1.0 mm.

  On the other hand, as a comparison object, except for the point that the waterproof structure is not provided (all consisting of a flat surface), the other structure is the same folded roof plate (control example) as the above test object. Referring to the photograph in FIG. 12, both the test example and the control example are arranged at an inclination angle of 3/100, and the transparent upper side from the lower end is 400.0 mm above the water side and has the same cross-sectional shape and the longitudinal direction is 500.0 mm. A plate (2.0 mm thick) was placed in close contact, and the overlapped portion of the folded plate was reproduced with the inside visible.

  And about the folding plate for roofs which has the overlap part of these test examples and a control example, the blowing condition of the rain water substantially comparable at the time of a typhoon was reproduced, and the waterproof function of the overlap part was verified. For the rainwater blowing, the tester stood at a point 1.0 m away from the installation position of each folded plate, and the jet of the water sprayer was carried out for 1 minute each on the lower part of the transparent PET plate.

  The photographs in FIG. 13 and FIG. 14 show the results of each experiment. A line was drawn with a marker along the boundary line in which water entered, so that the boundary line was easily visible. From these comparisons, in the control example without ribs shown in the photograph of FIG. 13, it was confirmed that water had penetrated to the upper end (500.0 mm) of the transparent PET plate, and the ribs shown in the photograph of FIG. 14 were provided. In the test example, it was confirmed that water penetrated up to 140 mm. For reference, a roof folding plate similar to the above-described test example was prepared except that the rib pitch P was 19.9 mm, the peak height H was 1.0 mm, and the flat portion was formed except for the overlapping portion. The result of testing by the same method as above is the photograph of FIG. 15, but in this case, water penetrated to 180 mm. From the above results, it was considered that it was possible to cope with rain blowing of a general scale typhoon by setting the total width of the ribs to at least 200 mm.

  From the above test results, in the test example according to the present invention provided with a waterproof structure formed in a ripple shape with continuous ribs, the water penetration distance is about one-fourth that of the control example with a flat surface without ribs. Therefore, it was found that the water resistance was clearly superior from the viewpoint of waterproofness. Moreover, when producing the folding plate for roofs of this invention of such a structure, it was able to be produced easily only by the process by a roll molding machine.

  In addition, as a result of testing in the same manner as described above with various rib sizes (pitch P / height H) and various waterproof structure ranges (vertical width), the present inventors have shown in the above-described first embodiment. It has been clarified that the waterproof function can be exhibited in various weather conditions including typhoons of a general scale by creating folded roof plates with the above configuration.

  As described above, the folding plate for roof can be easily manufactured at low cost while ensuring sufficient waterproofness in the overlapped portion when arranged vertically in the longitudinal direction according to the present invention.

  In other words, the present invention in which the ribs are continuously arranged in a ripple shape can prevent the intrusion of rainwater in all weather conditions, and also enables the mass production of roof materials of the same size and the same standard in the factory, thereby enabling the molding work on site. Since it becomes unnecessary and can be manufactured simply by adding a rib roller for rib formation to a general-purpose roll molding machine, it has become possible to reduce manufacturing costs and equipment costs.

  In addition, by using the folded sheet for roof according to the present invention, construction on site by a small number of people is possible and the construction cost is reduced. Furthermore, since the present invention can be constructed without problems even in renovation work etc. that is performed at a site where there is not enough space such as an urban area or a facility in operation, the construction can be facilitated and the construction period can be shortened. is there.

The fragmentary perspective view which shows 1st Embodiment in this invention. The fragmentary perspective view which shows 2nd Embodiment in this invention. The expanded end view of the waterproof structure part of the folded-plate for roofs of FIG. The expanded end elevation which shows the state which piled up the plane part of the other folding plate for roofs on the waterproof structure part of FIG. The elements on larger scale of FIG. FIG. 5 is an end view showing an application example to the superposition method of FIG. 4. The end view which shows the application example of a rib shape. The layout for demonstrating the manufacturing method of the folded plate for roofs in embodiment of FIG.1, FIG.2, FIG.7. The elements on larger scale for demonstrating the effect | action of the press shaping means for forming a rib in the roll molding machine of FIG. The enlarged partial view for demonstrating operation | movement of the press shaping means for shape | molding a rib in the roll molding machine of FIG. The longitudinal cross-sectional view of the width direction of the folding plate for roofs used as a test object in Example 1. FIG. 4 is a photograph for explaining the test method in Example 1. FIG. The photograph which shows the test result (control example) in Example 1. FIG. The photograph which shows the test result (test example) in Example 1. FIG. Photograph showing test results (reference example). The fragmentary perspective view which shows a prior art example.

Explanation of symbols

  1A, 1B, 1C Folding plate for roof, 2A, 2B, 2C waterproof structure, 11, 12 plane, 13, 14 inclined surface, 20, 21 rib, 30, 31, 32, 33 plane section, 50 strip steel plate, 100 roller Molding machine, 110, 120 press forming means, 111 rib roller

Claims (5)

A strip-shaped steel sheet having a thickness of 0.6 mm to 1.2 mm is combined with valley folds and mountain folds along a fold line along the longitudinal direction so that the top plane and the bottom plane are continuously inclined in the width direction and the cross section is approximately It is formed in a bottomed V-shape, and the bending angle of the inclined surface with respect to each plane is 40 ° to 80 °, and a plurality of them are arranged in parallel in the width direction while overlapping a predetermined range on the short side. In the folded plate for roof arranged in a plurality of columns in the longitudinal direction,
At least one of the overlapping short sides is provided with a waterproof structure in which a plurality of rib-shaped ribs extending in the width direction are continuously arranged in the longitudinal direction, and the height difference between the top and bottom of the continuous ribs is 0 The roof fold is characterized in that it has a thickness of 0.5 mm to 3.0 mm and prevents the rainwater from entering the inside of the roof by avoiding capillary action in the space formed in the overlapping portion due to the height difference. Board.   The waterproof structure is provided in a zigzag longitudinal section by the plurality of ribs continuously formed in the longitudinal direction by repeating valley folding and mountain folding along a folding line along the width direction of the strip steel plate. The folded sheet for roof according to claim 1.   The folded plate for roof according to claim 1 or 2, wherein a pitch of the continuous ribs is 8.0 mm to 22.0 mm.   The folded sheet for roof according to claim 1, wherein the waterproof structure has a total width in the longitudinal direction of the plurality of ribs of 200.0 mm or more.   In the manufacturing method of the folded sheet for roof which is continuously formed in the longitudinal direction by roll forming from the strip-shaped steel plate using a roll forming machine having a plurality of press forming means in the longitudinal direction, the plurality of ribs are first formed upstream in the upstream side. The roof structure according to claim 1, 2, 3, or 4, wherein the waterproof structure is provided by forming the waterproof structure in a predetermined range in the longitudinal direction, and thereafter, is formed into a substantially bottomed V-shaped cross section on the downstream side. A manufacturing method for folded plates.