Technical field [0001] CROSS REFERENCE TO RELATED APPLICATIONS This application is based on Japanese Patent Application No. 2016-002072, filed in Japanese on January 7, 2016, and claims priority, the contents of which are incorporated herein. [0002] The present invention relates to a manufacturing method and a H-shaped steel products to produce the H-shape steel slab like a rectangular cross-section as a material. BACKGROUND [0003] 　In the production of H-section steel, and shaped into coarse profile (the rolled material of so-called dog-bone shape) material slab or bloom like extracted from the heating furnace by the rough rolling mill (BD), the intermediate universal rolling machine by then rolling the thickness of the web and the flanges of the crude shaped product, wrought and shaping of the width reduction and the end face flange to the material to be rolled is applied by edger rolling mill close to the intermediate universal rolling mill together . Then, H-shaped steel product by finishing universal rolling machine is shaped. [0004] 　In the manufacturing method of the H-shaped steel, various techniques have been developed as a method for shaping the rough profile of the called dogbone shape away from the slab material is a rectangular cross-section. For example, Patent Document 1, with respect to the rectangular cross-section material, put a groove in the material end with a split insertion projection formed on the roll collar between the boxes caliber, combination box caliber and split insertion projection technique to obtain a crude shaped steel pieces of a large size (dogbone shaped material) is disclosed in. Further, for example, Patent Document 2, after placing an interrupt to the slab end faces in a first caliber of rough rolling step, widening split the interruption in the second and subsequent grooved, or by deep interruption depth edging perform rolling technique to erase interrupts the slab end faces are disclosed in subsequent caliber. CITATION Patent Document [0005] Patent Document 1: JP 60-21101 Patent Publication Patent Document 2: JP-A 7-88501 Patent Publication Summary of the Invention Problems that the Invention is to Solve [0006] 　Recently, it has been desired production of large H-shaped steel products due to the size of the structure or the like. Especially products broadened compared contribute significantly flange strength and rigidity of the H-shaped steel conventionally been desired. Flange to produce a H-shaped steel products that are broadening, it is necessary to shape the large material to be rolled flange width compared with conventionally shaped in the rough rolling step. [0007] 　However, in the technology described in Patent Document 1, with respect to material such as interrupt put slabs, particularly without passing through the transition or the like of the interrupt shape immediately bottom perform edging rolling by box grooved flat shape , it has shaped a flange corresponding portion, the shape due to varying rapidly the shape of the rolled material failure is likely to occur in such a way. In particular, the shape change of the rolled material in such a molding includes a force of the contact portion between the rolled material and the roll are those determined by the relationship between the flexural rigidity of the material to be rolled, it size of the flange width than conventional there is a problem shape defect is more likely to occur in the production of H-beams. [0008] 　Further, for example, in the technique disclosed in Patent Document 2, put the interruption to the material the end face of such slabs (slab end surface), and edging of that end, a method of performing rough rolling by utilizing the width of spread, there is a limit to the broadening of the flange. That is, the wedge design in order to broadening of the flange in a conventional rough rolling method (interrupt angle design), pressure adjustment, although improved techniques by the width spread such lubrication adjustment is achieved, any method to be the flange width because does not contribute significantly, the width spread ratio indicating the ratio of the spread of the flange width to the edging weight is about 0.8 in the initial stage of the efficiency is the highest conditions of edging, the edging of the same caliber Under the conditions repeatedly, decreases as spread value of the flange width is increased, and finally is known to be about 0.5. Further, the material itself such as slub large, it is conceivable to increase the edging amount, the equipment scale and reduction amount of the rough rolling mill went and is not realized broadening of the sufficient product flanges because of the device limits there are circumstances. [0009] 　Further, when the flange to produce the H-shaped steel products that are broadening, in order to build a large material to be rolled in the flange width compared with conventionally shaped in the rough rolling step, in the rough rolling step and subsequent rolling process is concerned that conventionally there are problems such as never been shaped defect, there is a demand realization of resolution methods. [0010] 　In view of such circumstances, an object of the present invention, the caliber of the rough rolling step using in the production of H-beams, the deep interruption in projections that an acute tip shape the material end surface of such slab placed, by successively folding the flange portion formed by it, together with the by suppressing the generation of shape defect in the rolled material to produce a large H-beams products flange width efficiently and stably than conventional crude It is to provide a manufacturing technique H-beams, such as not to cause shape defects in molding using a flat shaped caliber in rolling process. Means for Solving the Problems [0011] 　To achieve the above object, according to the present invention, the rough rolling process, a process for the preparation of the intermediate rolling step, H-section steel having a finish rolling step, the rolling mill to perform the rough rolling process, the is 5 or more inscribed a plurality of grooved to shape the rolled material, in the plurality of grooved one or more paths shaping of the material to be rolled is performed, the first of the plurality of grooved grooved and the second the grooved, projections put interrupt vertically relative to the width direction of the material to be rolled is formed, the end face of the rolled material at least one pass or more shaping in the second grooved later among the plurality of grooved and caliber and peripheral surface reduction is performed in a state of contact, the plurality of grooved steps in the third grooved after sequentially folding the divided part molded by the interrupt except the last caliber of is performed, the final caliber of the plurality of grooved is flat shaped caliber, to the flat shaping grooved Kicking rolling molding is characterized in that it is conducted in the rolling conditions for the pull-down rate is 1.0 or less, the production method of the H-beams is provided. 　Here, the pull-down rate, the material to be rolled in a flat shaped grooved shows a "flange width reduction / web thickness reduction amount". [0012] 　In the production of dimension 1500mm × 600mmH section steel, rolling molding in the flat shaped hole type, web thickness of the rolled material after rolling molding may be performed by rolling conditions to be more 160 mm. [0013] 　Further, according to the present invention, there is provided a H-shaped steel products manufactured by the manufacturing method of the H-section steel described above, wherein the flange width is 400mm greater, H-section steel product is provided . Effect of the invention [0014] 　According to the present invention, the caliber of the rough rolling step using in the production of H-beams, deep interrupts placed in protrusion in which the sharp tip shape the material end surface of such slab, which is formed by it by bending the flange portion sequentially by suppressing the generation of shape defect in the rolled material, with the production of large H-beams products flange width efficiently and stably than the conventional, flat shaped hole in the rough rolling step manufacturing techniques H-beams, such as not to cause defective shape can be realized in molding using a mold. BRIEF DESCRIPTION OF THE DRAWINGS [0015] FIG. 1 is a schematic illustration of a production line of H-shaped steel. FIG. 2 is a schematic illustration of a first caliber. 3 is a schematic illustration of a second caliber. 4 is a schematic illustration of a third grooved. 5 is a schematic explanatory view of a fourth grooved. Is a schematic illustration of FIG. 6 fifth grooved (flat shaped grooved). To [7] the rolled material after shaping in the fourth grooved, with a flat shaped caliber with known configurations and shapes than a conventional, schematically in the case of carrying out the rolling shaping in a conventional rolling conditions it is an explanatory diagram. [8] when the progress in rolling in the fifth hole type, and the relationship of the flange width and web thickness Metropolitan of the rolled material is a graph showing the relationship between web thickness and the pull-down rate. DESCRIPTION OF THE INVENTION [0016] 　It will be described below with reference to the drawings, embodiments of the present invention. In the specification and drawings, components having substantially the same function and structure are a repeated explanation thereof by referring to the figures. [0017] 　Figure 1 is an explanatory view of the manufacturing line T of H-beam comprising rolling equipment 1 according to this embodiment. As shown in FIG. 1, the production line T in order from the upstream side, the heating furnace 2, the sizing mill 3, the roughing mill 4, the intermediate universal rolling mill 5, finishing universal rolling mill 8 are arranged. Further, edger rolling mill 9 is provided near the intermediate universal rolling mill 5. In the following, the steel in the manufacturing line T for explanation, collectively described as "the rolled material A", sometimes illustrated with the shape dashed-hatched, or the like as appropriate in each figure. [0018] 　As shown in FIG. 1, the production line T, the rolled material A, for example, a slab 11 like extracted from the heating furnace 2 is rough rolled in the sizing mill 3 and roughing mill 4. Then, the intermediate rolling in the intermediate universal rolling mill 5. At the time of intermediate rolling, rolling is performed on the end portion or the like of the material to be rolled (flange portion 80 to be described later) by the edger rolling mill 9 as needed. In the usual case, the roll sizing mill 3 and roughing mill 4, a total of four to six approximately grooved are engraved, H Katachiara in reverse rolling of about 10 several paths via these profiles 13 are shaped, using a rolling mill train comprising the H-shaped coarse profile 13 from the two rolling mill of the intermediate universal rolling mill 5 edger rolling mill 9, reduction of multiple paths is added, the intermediate member 14 is shaped. The intermediate member 14 is finish rolled to a product shape in the finish universal rolling mill 8, H-shaped steel product 16 is produced. [0019] 　Next, will be described with reference to the drawings grooved structure or pore shape which is inscribed in the sizing mill 3 and roughing mill 4 shown in Figure 1 below. 2 to 6 are schematic explanatory views of the caliber to be engraved on the sizing mill 3 and roughing mill 4 for rough rolling step. Here, the first hole-type to fourth grooved described, for example may be all engraved in the sizing mill 3, the first grooved to fifth hole type sizing mill 3 and roughing mill 4 5 hole type may be carved separately. That is, the first hole-type to fourth grooved may be engraved over both the sizing mill 3 and roughing mill 4, may be engraved on one of the rolling mill. The rough rolling step in the normal production of H-beams, are shaped in one or more paths in each of these grooved performed. [0020] 　As will be described grooved to be inscribed in the present embodiment illustrates the case of five, also its caliber number, need not necessarily be five-hole type, 5 or more of the plurality of grooved number it may be. That may be a suitable caliber configuration for shaping the H-shaped coarse profiles 13. Note that illustrated in FIGS. 2-6, a schematic final pass shape of the rolled material A during molding in the grooved by a broken line. [0021] 　Figure 2 is a schematic illustration of a first caliber K1. The first caliber K1 is engraved on the grooved roll 20 and the lower grooved roll 21 are a pair of horizontal rolls, the material to be rolled A is in roll gap of over grooved roll 20 and the lower grooved roll 21 It is pressure-molding. Further, the peripheral surface of the upper grooved roll 20 (i.e., the upper surface of the first hole-type K1), the protrusion 25 which protrudes toward the inside caliber is formed. Further, the peripheral surface of the lower grooved roll 21 (i.e., the bottom surface of the first hole-type K1), the projections 26 projecting toward the inside caliber is formed. These projections 25 and 26 has a tapered shape, the dimensions of the projecting length and the like are configured equal to each other between the protrusion 25 and the protrusion 26. The height of the protrusions 25 and 26 (projecting length) and h1, the tip angle and .theta.1a. [0022] 　In the first grooved K1, projections 25 and 26 is pressed against the upper and lower ends of the rolled material A (slab end surface), the interrupt 28, 29 are formed. Here, (also wedge angle is referred) tip angle of the projections 25 and 26 .theta.1a is desirably 40 ° or less e.g. 25 ° or more. [0023] 　Here, the caliber width of the first hole-type K1, the thickness of the material to be rolled A (i.e., the slab thickness) is preferably approximately equal to. Specifically, the width of the caliber at the tip of the projecting portions 25 and 26 formed in the first hole-type K1, by the slab thickness in the same, suitably secured lateral centering of the rolled material A It is. Further, with the construction of such caliber dimensions, as shown in FIG. 2, at the time of molding of the first grooved K1, the upper and lower ends of the material to be rolled A (slab end surface), the protrusion some parts 25, 26 and grooved side (side wall) is in contact with the rolled material a, with respect to the slab on the lower end portion which is divided into four elements by the interrupt 29 (site), the first hole it is preferable that positive pressure is not carried out at the top and bottom surfaces of the mold K1. Pressure by the top and bottom surfaces of the grooved is thus degrading the production efficiency will be caused to extend in the longitudinal direction of the rolled material A, the flange (flange portion 80 to be described later). That is, in the first hole-type K1, reduction in the protrusions 25 and 26 when the projections 25 and 26 is pressed against the upper and lower ends of the rolled material A (slab end surface), the interrupt 28, 29 are formed the amount (wedge tip draft amount), amount of reduction in the slab on the lower end portion is sufficiently larger than (the slab end surface reduction rate), thereby interrupt 28, 29 are formed. [0024] 　Figure 3 is a schematic illustration of a second caliber K2. The second grooved K2 is engraved on grooved roll 30 and the lower grooved roll 31 on a pair of horizontal rolls. Circumferential surface of the upper grooved roll 30 (i.e., the upper surface of the second hole-type K2), the projections 35 projecting toward the inside caliber is formed. Further, the peripheral surface of the lower grooved roll 31 (i.e., the bottom surface of the second hole-type K2), the projecting portion 36 projecting toward the inside caliber is formed. These projections 35 and 36 has a tapered shape, the dimensions of the projecting length and the like are configured equal to each other between the protrusion 35 and the protrusion 36. These tip angle of the projections 35, 36 is preferably a wedge angle θ1b of 40 ° or less 25 ° or more. [0025] 　Incidentally, the wedge angle θ1a of the first hole-type K1 secures the tip thickness of the flange corresponding portion to increase the inductive, in order to ensure the stability of the rolling wedge angle of the second hole-type K2 of the subsequent it is preferably the same angle as Shita1b. [0026] 　Height (projecting length) h2 of the projecting portion 35 and 36, the is configured higher than the height h1 of the protruding portions 25 and 26 of the first hole-type K1, it has a h2> h1. The tip portion angle of the protrusion 35 and 36 the first hole-type K1 protrusions 25, 26 of the tip angle same as it is on the rolling dimensional accuracy and, preferably. In the these upper grooved roll 30 roll gap of the lower grooved roll 31, the material to be rolled A after the first hole-type K1 mails material is further shaped. [0027] 　Here, than the height h1 of the protruding portions 25 and 26 formed in the first hole-type K1, higher in the height h2 of the projecting portion 35, 36 formed in the second hole-type K2, the material to be rolled A becomes longer toward the second hole-type K2 similarly on penetration length of the lower section (slab end surface) of the. The rolled material penetration depth into A of the protruding portions 35 and 36 in the second grooved K2 is the same as the height h2 of the projecting portion 35, 36. That is, the material to be rolled penetration depth h1 'to A, penetration depth into the material to be rolled A of the protruding portions 35, 36 of the second grooved K2 of projections 25, 26 of the first grooved K1 h2 is made on the relationship between h1 '