Technical field [0001] 　The present invention is a crank shaft shape inspection apparatus, a system and method. BACKGROUND [0002] 　Crankshaft, by die forging and pressing the heated material with upper and lower molds after molding a forging containing burr to remove burrs are produced by subjecting a shot blasting process. Crankshaft produced by these production processes, when incorporated into an engine of an automobile, the cutting to properly incorporate is performed. [0003] 　Figure 1 is a diagram showing an example of a crankshaft (the crankshaft for the series 4-cylinder engine) schematically orthogonal front view seen from the direction of the rotational axis L of the crankshaft S, and the rotational center axis L is a side view from direction. 　Crankshaft S includes a plurality of pins S1 in order to attach a connecting rod provided at a position of a predetermined angle around the rotation center axis L (not shown), and a plurality of counterweight S2 for taking the rotational balance, plural and a journal S3. The shape of the pin S1 is a cylindrical shape around the position apart from the rotation center axis L of the crankshaft S. The shape of the journal S3 is a cylindrical shape around the rotational axis L of the crankshaft S. Cross-sectional shape of the counterweight S2 is a complex symmetrical shape. [0004] 　As described above, since the crankshaft is complicated shape, during the forging, variations in material dimensions, unevenness of the material temperature, the fluctuation of the forging operations, the underfill the material to the end of the mold is not filled referred defects or bends over the entire length or twist of the crankshaft, the inclination of the counterweight may occur. Also, sometimes it scratches depressions in contact with the transport facility or the like during handling of the crank shaft results. In the manufacturing process of the crankshaft, the shot blasted underfill of the crankshaft, bending, in order to detect the twisting and dent flaw, before performing the cutting, the actual shape of a crankshaft examined in comparison with the reference shape , it is to determine the pass or fail. [0005] 　The criteria for acceptability determination of the crankshaft, 　(a) bending of the crankshaft, twisting, and the position of the counterweight is within a predetermined allowable range, 　(b) sufficient machining allowance to be no depth of underfill secured or dents that there is no scratches, 　and the like. 　As described above (a), why the bending of the crankshaft, twisting, and the position of the counterweight is to be within a predetermined allowable range has become one of the acceptance criteria, the large bending of the crankshaft, or , achieved the position of the installation angle and counterweight twist is large pin is greatly deviated from a predetermined angle and position, even subjected to any processing in a later step, the dimensional accuracy and the weight balance of the final product This is because it is difficult to be. 　Further, as described above (b), why it does not have sufficient cutting margin the underfill and depth of the depression in the can not be secured scratches has become one of the acceptance criteria, if the cutting margin is too small, post-process in less room to perform the cutting, because it becomes difficult to achieve the dimensional accuracy and the weight balance of the final product. [0006] 　Method for inspecting a conventional crankshaft, each plate gauges formed to conform to the reference shape of the pin and counterweight, Ategai each test pins and counterweights of the crankshaft, each plate gauge and pins and counter the gap between the weight measured in scale, if the size (shape errors) of the allowable range of the clearance, was to determine the crankshaft pass. This approach, using the formed plate gauge to meet the reference shape of the pin and the counterweight, because performed manually by an operator, not only individual differences occur in inspection accuracy, much time test the had a problem that it takes. Therefore (see e.g. Patent Documents 1 to 4), in order to perform an accurate inspection with automatic inspection method of various crankshaft have been proposed. CITATION Patent Document [0007] Patent Document 1: JP-A-6-265334 Publication Patent Document 2: JP-A 10-62144 discloses Patent Document 3: JP 2010-31987 JP Patent Document 4: JP 2007-212357 JP Summary of the Invention Problems that the Invention is to Solve [0008] 　Patent Document 1, while rotating the opposite ends of the crankshaft about the rotational center axis fixed with a chuck, to the crank shaft surface by using an optical head for projecting a laser beam in the direction perpendicular to the rotational axis by measuring the distance, method of calculating the angular position of the pin and counterweight of the crankshaft have been proposed. 　Patent Document 2, the distance to the counterweight of the crankshaft measured at 2-dimensional laser rangefinder, by comparison with a reference shape, a method of detecting an underfill counterweight is proposed. 　By a technique described in Patent Document 1 detects the torsion of the crankshaft, it is possible to detect the underfill by a technique described in Patent Document 2. However, in the technique of Patent Documents 1 and 2, the vertical plane of the counterweight, that is, the laser light is not projected on the surface to stand substantially perpendicular to the rotation axis L of the crankshaft S, accurately measuring the shape of the surface can not be, inspection of the counterweight position, it was necessary manual operations. Also, or it is necessary to rotate the crankshaft, to or using a one-dimensional laser rangefinders (Patent Document 1) or a two-dimensional laser rangefinders (Patent Document 2), to measure the distance over the entire length of the crankshaft It takes a lot of time to. Therefore, in the manufacturing process of the crankshaft, it is difficult to perform an inspection over the entire length of the crankshaft, or sampling inspection, or it is necessary to perform the test is limited to the site requiring minimal examination of the crankshaft . [0009] 　Patent Document 3, to measure the shape of the material crankshaft by the shape measuring machine such as a laser displacement meter, a technique for determining the position of the center hole of the crankshaft have been proposed. 　In the method described in Patent Document 3, but to measure the 2-dimensional shape of the counterweight (the outer peripheral contour position and side axial position), it is impossible to accurately measure the shape of the vertical plane of the counterweight. [0010] 　Patent Document 4, while measuring the surface shape of the entire crankshaft, 3-dimensional model for determination obtained by complementing the measured is not possible part 3-dimensional model for complemented by a three-dimensional shape measuring apparatus, predetermined method in whether they meet the criteria for inspecting the crankshaft have been proposed. 　In the technique described in Patent Document 4, in determining whether they meet a predetermined criterion, for example, a three-dimensional point cloud data obtained by essentially a three-dimensional shape measuring apparatus (three-dimensional model for determination) , by matching the surface shape model of the crankshaft generated from CAD data or the like based on the design specifications of the crankshaft, it is conceivable to evaluate the amount of deviation. However, the shift amount, whether occurring due to partial defects such as underfill, or whether it occurs due to such bending over the entire length of the crankshaft, to accurately distinguish between the two it is difficult. [0011] 　The present invention aims to make it possible to accurately test in a short time the shape of the crankshaft. Means for Solving the Problems [0012] 　One embodiment of the present invention to solve the problems described above is as follows. 　(1) a plurality of journals, a plurality of pins, and a supporting device for supporting a crank shaft having a plurality of counterweight disposed between the journal and the pin, 　the projection portion and a projection portion that projects light and a light receiving portion for receiving a projection with light, said supported by the supporting device disposed around the crankshaft, four or more of a shape measuring apparatus for obtaining partial shape information of a partial shape of said crankshaft with the door, 　the said crank shaft supported by the supporting device, wherein the four or more and a shape measuring apparatus, and movable relative to the axial direction of the crankshaft, 　said four or more of a shape measuring apparatus, 　wherein in the axial direction of the crankshaft, a first group of a shape measuring apparatus for acquiring the partial shape information including the one side of the counterweight, 　before In the axial direction of the serial crankshaft, the counter the partial second group of shape information acquiring a shape measuring apparatus including the other side of the weight, are distinguished in capital, 　in the circumferential direction of the crankshaft, of the first group during each shape measuring apparatus, the shape measurement device of the second group are arranged, the crankshaft shape inspection apparatus. 　(2) said four or more of a shape measuring device, the are arranged at equal intervals in the circumferential direction of the crankshaft, the crankshaft shape inspection apparatus according to (1). 　(3) the projection portion and the light receiving portion, the are arranged along the axial direction of the crankshaft, beta