0001]The present invention is panel-shaped molded article, a vehicle door, and a method for producing a panel-shaped molded article. More particularly, the vehicle door inner panel into a suitable panel-shaped molded article such as an automobile, applicable vehicle door in a vehicle such as an automobile, and a method for producing a panel-shaped molded article. BACKGROUND [0002]Vehicle door, such as an automobile is produced mainly combining the door inner panel and a door outer panel. The door the vehicle, a window, the window driving device, an acoustic speaker, various components of the handle or the like is attached. For accommodating these components, between the door inner panel and a door outer panel space is required. Therefore, for example, the vertical wall portion is provided in the door inner panel, by the vertical wall portion, the space is formed. Further, when the vehicle door is closed, it is necessary to interior is sealed by a door. Therefore, for example, stepped portion is provided on the vertical wall portion of the door inner panel. By the step portion faces the vehicle body pillar and the like, car sealing is ensured. [0003] 　It said door inner panel is shaped steel plate by pressing. In general, since the shape of the door inner panel is complicated, by press working, greatly deform the steel plate. Therefore, cracks molded door inner panel, there is a case where wrinkles or the like occurs. To suppress the generation of cracks and wrinkles, typically, the door inner panel material, high workability mild steel plate is used. [0004] 　However, the strength of mild steel plate is low. Therefore, the strength of the door inner panel molded with mild steel plate is low. Accordingly, the door inner panel reinforcing member (e.g. belt line reinforcement, a door impact beam, etc.) are often attached. [0005] 　Door inner panel, for example, JP 2007-296953 (Patent Document 1) is disclosed in JP-A-2008-94353 (Patent Document 2) and JP 2013-112133 (Patent Document 3). [0006] 　Door inner panel disclosed in Patent Document 1 includes a beltline reinforcement. Beltline reinforcement is joined along the vehicle longitudinal direction in the belt line portion of the door inner panel. Thus, the belt line reinforcement to bear the impact load in the vehicle longitudinal direction, the bending moment acting can be effectively reduced in the belt line portion, and is described in Patent Document 1. [0007] 　The door inner panel disclosed in Patent Document 2, when a collision load from the side of the vehicle is loaded, a door inner panel and the belt line reinforcement is in contact, a load absorption portion of the door inner panel is deformed. Thus, the load absorbing portion for absorbing a portion of the load applied in the thickness direction of the door inner panel, the stiffness of the door inner panel is secured, and are described in the patent document 2. [0008] 　The side door disclosed in Patent Document 3, the rear end and the front end portion of the belt line reinforcement which is molded by hot stamping is a low strength and low rigidity than the main body portion. Thus, when a collision load from the front of the vehicle body loaded, the rear end portion of the beltline reinforcement is plastically deformed, the contact area between the center pillar increases. Therefore, deformation of the rear end portion of the beltline reinforcement can absorb the energy of the collision, and is described in Patent Document 3. CITATION Patent Document [0009] Patent Document 1: JP 2007-296953 Patent Publication Patent Document 2: JP 2008-94353 JP Patent Document 3: JP 2013-112133 JP Summary of the Invention Problems that the Invention is to Solve [0010] 　However, the door inner panel of Patent Document 1, 2 and 3, it is essential separate reinforcing member such as a belt line reinforcement to ensure a collision characteristics. Therefore, the door produced from the door inner panel of Patent Document 1, 2 and 3, the production efficiency is low, the cost is high. [0011] 　An object of the present invention have excellent panel-shaped molded article crashworthiness, vehicle door comprising the panel-shaped molded article, and to provide a method for manufacturing a panel-shaped molded article. Means for Solving the Problems [0012] 　Panel-like molded article according to the present embodiment the material is a metal plate. Panel-like molded article comprises a top plate portion of the polygonal shape, and a plurality of vertical wall portions, and a flange portion. Vertical wall portion extends from at least two sides of the outer edge sides of the top plate portion. Flange portion leads the lower end of the vertical wall portion, extending in the extending direction of the top plate portion. The top plate portion includes an edge, and a concave portion. Edges, including edges to connect with the vertical wall portion of the outer edge of the top plate. Recess is disposed inside the edge is recessed from the edge. Among the plurality of the vertical wall portion, each of the at least one pair of vertical wall portions adjacent to each other, comprising a first vertical wall portion, and the step portion, a second vertical wall portion. Stepped portion leads the lower end of the first vertical wall portion, extending in the extending direction of the top plate portion. The second vertical wall portion is connect with the outer edge of the stepped portion, extending in the extending direction of the first vertical wall portion. Flange portion leads the lower end of the second vertical wall portion. [0013] 　The vehicle door is provided with the panel-shaped molded article, and a door outer panel, and the window member. Door outer panel is placed on the vehicle outer side of the panel-shaped molded article, it is joined to the panel-shaped molded article. In this case, the door outer panel is joined to the flange portion of the panel-shaped molded article, the recess of the panel-shaped molded portion is recessed in the door outer panel side. Window member is receivable in the recess of the panel-shaped molded article is placed on the vehicle inner side of the panel-shaped molded article. [0014] 　Method for manufacturing a panel-like molded article according to the present embodiment is a method for producing a panel-shaped molded article and the material of the steel plate. Panel-like molded article is provided with the above configuration. This manufacturing method includes a preparation step of preparing a blank made of steel sheet, by performing press work on the blank, as well as forming a top plate portion, by molding to the height of the first vertical wall portion and the stepped portion, comprising an intermediate pressing step of producing a intermediate product, using the final pressing device, and a final pressing step of producing a panel-shaped molded article is subjected to press working to the intermediate molded article. Final pressing device includes a central die including the end face shape corresponding to the shape of the top plate portion of the panel-shaped molded article and the outer edge of the stepped portion, the blank an outer central die is positioned next to the central die and the holder, opposite to the central die, and the central punch comprises an end face shape corresponding to the shape of the top plate portion of the panel-shaped molded article to the step portion, an outer central punch is placed next to the central punch, and an outer punch facing the blank holder. In the final pressing step, by placing the intermediate article on a central die, sandwiching the intermediate product by the central punch and the central die, further comprising the step prior to sandwiching the intermediate molded article by the outer punch and blank holder, the intermediate molded article with respect to the central punch and the central die while sandwiching the and the outer punch and blank holder remains sandwiching the intermediate product relative movement, the panel-like molding by molding the second vertical wall portion and the flange portion and a step after forming the article. Effect of the invention [0015] 　Panel-like molded article according to the present invention is excellent in the collision characteristics. A method of manufacturing a panel-like molded article according to the present invention can produce excellent panel-shaped molded article crashworthiness. BRIEF DESCRIPTION OF THE DRAWINGS [0016] [1] Figure 1 is a perspective view of a panel-shaped molded product of the present embodiment. FIG. 2 is a vertical sectional view in the vertical direction of the vehicle door for a vehicle. FIG. 3 is panel-shaped molded article shown in FIG. 1 is a cross-sectional view perpendicular to a vertical direction of the vehicle door for a vehicle which is applied as a door inner panel. [4] FIG. 4 is a perspective view of a different panel-shaped molded article and Fig. FIG. 5 is a cross-sectional view of the intermediate molded article which is an intermediate product of the panel-shaped molded article. [Figure 6A] Figure 6A is a schematic view showing a step of the intermediate pressing step. [Figure 6B] Figure 6B is a schematic view showing a step subsequent to FIG. 6A. [Figure 6C] Figure 6C is a schematic view showing a step subsequent to FIG. 6B. [Figure 7A] Figure 7A is a schematic view showing a step of a first intermediate press processing step of FIG. 6A ~ FIG 6C and different intermediate pressing step. [Figure 7B] Figure 7B is a schematic view showing a step subsequent to FIG. 7A. [Figure 7C] Figure 7C is a schematic view showing a step subsequent to FIG. 7B. [FIG. 8A] Figure 8A is a schematic diagram showing a step of the second intermediate pressing step carried out after the step of FIG. 7A ~ Figure 7C. [Figure 8B] Figure 8B is a schematic view showing a step subsequent to FIG. 8A. [Figure 8C] Figure 8C is a schematic view showing a step subsequent to FIG. 8B. [9] FIG. 9 is a schematic diagram illustrating a heating step carried out after the intermediate pressing step. FIG 10A] FIG 10A is a schematic view of the final pressing device to be used in the final pressing step. [FIG. 10B] FIG 10B is a schematic view showing a step of final pressing step carried out after the heating step of FIG. [FIG. 10C] FIG 10C is a schematic view showing a step subsequent to FIG. 10B. [FIG. 10D] FIG 10D is a schematic view showing a step subsequent to FIG. 10C. FIG 10E] FIG 10E is a schematic view showing a step subsequent to FIG. 10D. [11] FIG 11 is a schematic diagram for explaining the generation of wrinkles in the pressing step. DESCRIPTION OF THE INVENTION [0017] 　Panel-like molded article according to the present embodiment the material is a metal plate. Panel-like molded article comprises a top plate portion of the polygonal shape, and a plurality of vertical wall portions, and a flange portion. Vertical wall portion extends from at least two sides of the outer edge sides of the top plate portion. Flange portion leads the lower end of the vertical wall portion, extending in the extending direction of the top plate portion. The top plate portion includes an edge, and a concave portion. Edges, including edges to connect with the vertical wall portion of the outer edge of the top plate. Recess is disposed inside the edge is recessed from the edge. Among the plurality of the vertical wall portion, each of the at least one pair of vertical wall portions adjacent to each other, comprising a first vertical wall portion, and the step portion, a second vertical wall portion. Stepped portion leads the lower end of the first vertical wall portion, extending in the extending direction of the top plate portion. The second vertical wall portion is connect with the outer edge of the stepped portion, extending in the extending direction of the first vertical wall portion. Flange portion leads the lower end of the second vertical wall portion. [0018] 　Thus, the panel-shaped molded product of the present embodiment is provided with a recess in the top plate. Therefore, increasing the collision properties of the panel-shaped molded article. For example, if a combination of panel-shaped molded article and an outer panel, the collision properties of the combined product is improved. Specifically, the outer panel or the like is deformed by the collision load, the outer panel or the like deformation hits the recess of the top plate portion of the panel-shaped molded article. Thus, the recess absorbs collision energy. Thus, because the collision properties of the panel-shaped molded product of the present embodiment is higher, also increases the collision properties of the product, which the panel-shaped molded article is mounted. [0019] 　Above the panel-shaped molded article may be molded by cold pressing, may be molded by warm pressing may be molded by hot pressing. Also, of the panel-shaped molded article, the intermediate molded article press molded from the top plate portion to a height of up to the stepped portion, and carrying out hot stamping, may be produced panel-shaped molded article. [0020] 　In the panel-shaped molded article, the width W of the edge (mm), in relation to the maximum width L of the top plate portion (mm), may satisfy Equation (1). 　10