WIND MILL ASPA RAY PROTECTION DEVICE TECHNICAL FIELD The present invention relates to a device for projecting rays in a windmill blade, comprising a ray receiver attached to the external surface of the blade, a current of lightning being discharged from the receiver to the ground through the connection equipment such as a conductor laid through the interior of the windmill blade and a windmill body portion or a deflection brush, and a method for assembling the ray protection device. PREVIOUS BOARD As measures to protect a windmill turbine blade or a total windmill device from lightning striking the windmill blade, for example, a Patent Document 1 (PCT-WO2004 / 111686A1) or a Patent Document 2 (PCT-WO2005 / 026538A1) proposes a lightning protection device comprising a ray receiver attached to the external surface of a blade, from which a lightning current caused by a beam striking the receiver it is driven to the ground through a conductor extended through the inside of the blade, a rotor head, a main shaft, a tower and the like in the body part of the windmill device. In the technology described in Patent Document 1, the ray receptors are arranged in various positions on the outer surface of a windmill blade along the longitudinal direction of the blade from the tip end portion of the blade. , and the lightning currents from the receivers are discharged to the earth through wire skeins driven through the inside of the blade and the windmill body. In the technology described in Patent Document 2, lightning receptors are exposed on the outer surfaces of the lateral belly armor and the posterior lateral shell by means of screws while lead wires of the receivers are connected to a down conductor . However, even when the technology described in Patent Document 1 relates to the configuration that the ray currents from the ray receptors are arranged at various positions along the longitudinal direction of the blade from the tip end of the same, are discharged to the earth through lead wires driven inside the blade and the windmill body, and even when the technology described in Patent Document 2 is related to the configuration that the ray receptors they are exposed in the lateral belly of the belly and the shell of the back side of the blade so as to allow a ray to strike the same while the receptors are fixed respectively on the posterior surfaces of the belly side shell and the side shield Subsequently by means of screws, both Patent Documents fail to describe effective measures for assembling a receiver to the end portion of the ace tips. pa having a thin sheet metal profile of minor air, a countermeasure against an induced pressure increase inside the blade when striking a ray to the blade, and the like. EXPOSITION OF THE INVENTION The present invention is designed in view of the aforementioned problems inherent to the above branch, and consequently, an object of the present invention is to provide a lightning protection device of a windmill blade, having a structure simple that allows the easy assembly of a receiver adapted to be fixed to the tip end part of the blade having a smaller air sheet metal profile, and which may have an effective countermeasure against an induced pressure rise inside the blade when striking a beam the blade, and another object of the present invention is to provide a method for assembling the beam protection device of a windmill blade. For the purpose, in accordance with the present invention, there is provided a beam protection device of a windmill turbine blade, comprising a beam receiver fixed to the external surface of the blade, from which the beam current is discharged to the earth through connection equipment such as a lead wire driven through the inside of the blade and a windmill body or deflection brush, characterized by the receiver assembly having a configuration such that a base plate made of an electrically conductive material, to which the lead wires are connected, is embedded in the blade, and the receiver is fixed and supported to the base plate, which is exposed on the outer surface of the blade. In this invention, an adhesive is preferably filled in the inner space of the blade in the vicinity of the receiver assembly, including the periphery of the base plate. As for the adhesive, preferably an adhesive of the methacrylate group can be used. Further, in accordance with the present invention, there is provided a method for assembling a windmill blade protection device, which is configured as shown above, and in which a beam receiver fits on the outer surface of the blade, and a lightning current is conducted to the ground through the connection equipment such as lead wires or a deflection brush passing through the inside of the blade and a windmill body, characterized by the steps of insert a base plate made of an electrically conductive material and connected to it with the lead wires, inside the blade, filling an adhesive between the base plate and the blade shell in order to fix the base plate in the blade, and forming a receiver insertion hole that pierces through the shell of the blade and the adhesive, and inserting the receiver into the receiver insertion hole in order to fix the receiver to the base plate. In accordance with the present invention, since the ray receiver is fixed and supported to the base plate made of an electrically conductive material and embedded in the blade so as to constitute a receiver assembly, and a ground wire is connected to the base plate, the structure thereof can be extremely simplified, and since the lightning receiver is fixed and supported to the base plate so as to have a unitary structure, the assembly of the receiver to the cross can also be simplified. In addition, since the unit of the receiver assembly can optionally be fitted as a part where a ray is possibly caused, such as a tip end part or an intermediate part of the blade, its handling can be facilitated. Additionally, by filling an adhesive in the internal space of the blade in the vicinity of the receiver assembly including the periphery of the base plate, the air in the internal space can be displaced with the adhesive and, consequently, it is possible to avoid increasing the air pressure in the internal space due to the expansion of the air in the same when a ray hits the blade, in this way it is possible to prevent the occurrence of breakage of the blade caused by the increase in air pressure in the internal space. In addition, since the belly-side shell and the rear-side shell of the blade can be joined together through the intermediate of the adhesive, in this way it is possible to improve the blade strength. Additionally, the present invention may preferably have the following configurations: (1) The aforementioned receiver assembly is provided in the tip end portion of the blade (claim 3). In this case, the receiver assembly is preferably located closer to the tip end of the blade, than a main beam that is embedded in the blade in the longitudinal direction of the latter (Claim 4). With this configuration in which the receiver assembly is provided at the tip end portion of the blade where the main beam frame is not present since resistance support is not required, the receiver set can be easily embedded within the blade, in this way it is possible to simply mount the receiver assembly even in an existing blade; (2) In the aforementioned receiver set, the above-mentioned receiver is one of the disk-like receptors that are arranged on both the belly side and the back side of the blade, one or more for each side, the receivers on the belly side of the spacer being displaced from the receivers on the back side thereof on the outer surface of the blade, and which are fixed to the aforementioned base plate (claim 5). With this configuration, arranging the receiver assemblies so as to be displaced the receiver one from the other on the outer surface of the blade, even in the part of the blade that is thin so as to have smaller dimensions between the belly-side shell and the shell on the rear side, such as the tip end portion of the blade, the receiver assemblies can be easily adjusted on both the belly side and the back side of the blade. (3) The receiver assembly is provided in the tip end portion of the blade, and an adhesive is filled in the inner space thereof in the vicinity of the receiver assembly including the outer periphery of the base plate while a resin foamed urethane is filled in the internal space, in the parts of the blade, other than the part that is filled in with the adhesive (claim 6) - With this configuration in which the inner space of the blade is filled with the adhesive ( in the tip end part) and the urethane resin over the entire length of the blade (other than the tip end part), it is possible to improve the effect of preventing the occurrence of air expansion and an increase in the pressure of air in the inner space of the blade during the lightning strike on blade 1, and a blade break caused by it. In this way, in accordance with the present invention, the receiver assembly is formed by fixing and supporting the ray receiver to the base plate made of an electrically conductive material and embedded in the blade while the base plate is connected thereto with a lead wire to ground, and consequently, the configuration of the receiver assembly can be made extremely simple. In addition, since the ray receiver is fixed and supported to the base plate so as to be formed in a unitary body, the receiver assembly can be easily assembled to the blade 1. In addition, the receiver assembly can be adjusted in any of the Optional parts of the blade, that is, the tip end part, the intermediate part and the like of the blade, where the beam could possibly be caused, in this way it is possible to facilitate the handling of the blade. Furthermore, by filling the adhesive in the internal space of the blade in the vicinity of the receiver assembly including the periphery of the base plate, it is possible to avoid increasing the air pressure in the inner space of the blade, which is caused by an expansion of the air in the blade. the internal space when striking a ray in the blade, in this way it is possible to prevent the blade from breaking caused by an increase in air pressure in the internal space of the blade.
BRIEF DESCRIPTION OF THE DRAWINGS Figures 1A to IB are views to illustrate a device for projecting rays of a windmill blade, in an embodiment of the present invention, among which Figure 1A (an amplified view of a part z in Figure 2) is a partially amplified sectional view illustrating the tip end part of the blade ray protection device, and Figure IB is a sectional view along AA in Figure 1A; Figure 2 is a side view illustrating the complete simple blade in the aforementioned embodiment, Figure 3 is a sectional view along line B-B in Figure 2; and Figure 4 is a schematic side view illustrating a windmill equipped with a lightning protection device in accordance with the present invention. BEST MODALITY FOR IMPLEMENTING THE INVENTION A detailed explanation of one embodiment of the present invention shown in the accompanying drawings will be made below. It is noted that the dimensions, materials, forms and relative arrangements of component parts described in this embodiment should not be intended to limit the scope of the present invention to them, ie, these are only examples. Referring to Figure 4 that a schematic side view illustrating a windmill equipped with a lightning protection device in accordance with the present invention, there is shown a rotor head 2, a plurality of blades 1 fixed to the outer periphery of the rotor head 2, a main arrow 3 constituting an output arrow of the rotor head 2, a main bearing 4, a generator 8, a speed increasing gear 5 for increasing the speed of the rotor head 2 up to a programmed speed of the generator 8, a coupling 6 for coupling the speed increasing gear 5 with the generator 8, a nacelle 7, a nacelle bed panel 7a for supporting the nacelle 7, and a tower 9 installed vertically in the Earth. In addition, there is shown a shaft pivot bearing 10 interposed between the tower 9 and the nacelle bed panel 7a, the blade pivot bearings 11 for supporting the blades 1 to the rotor head 2. In addition, a beam chip receiver assembly 100 is shown attached to the tip end portion of each of the blades 1, a down conductor 21 incorporating lead wire driven from the tip receiver assembly 100, which is connected to a deflection lead wire 22 through a deflection brush 23 for the blade pivot bearing and a deflection brush 24 for the main arrow bearing, and the deflection lead wire 22 which is connected to the tower 9 through which it is grounded. The present invention relates to a windmill beam protection device of the windmill shown in Figure 4, and a method for assembling the lightning protection device. Figure 1A is a partially enlarged sectional view illustrating the tip end portion of the windmill blade in the embodiment of the present invention (an amplified view in a part z in Figure 2), and Figure IB is a sectional view along line AA in Figure 1A. Figure 2 is a side view illustrating the blade in a single unit body, and Figure 3 is a sectional view illustrating line BB in Figure 2. Referring to Figure 2, the tip receiver assembly 100 is mounted on the tip end part of the blade 1, and an intermediate receiver assembly 40 is mounted on the intermediate part of the blade 1. A reinforcing frame 41 is embedded in the blade 1, which is extended in the longitudinal direction of the blade 1 from the root part of the blade 1. The blade 1 has a shell Ib on the side of the belly and a shell on the back side. In addition, the aforementioned downward conductor 21 is connected to a base plate 30 (refer to Figure 1)., the detailed explanation will be made later) which serves as an output end of each of the tip receiver assembly 100 and the intermediate receiver assembly 40, which extends towards the root of the blade within the latter and is connected to a panel upper (not shown) of the lower part of the blade, which is made of an electrically conductive material, the deflection lead wire 22 being connected to the upper panel. Referring to Figure 3 which shows a setting configuration of the intermediate receiver assembly 40 in the blade 1, the receivers in the intermediate receiver assembly 40 are made of stainless steel (or any other electrically conductive material), and are exposed to the external surfaces of the shell the belly side and the rear side shield Ib so as to allow the reception of a beam, being fixed to the rear surfaces of the belly side shield Ib and the shell of the rear side by means of of bolts. The intermediate receivers are connected to the down conductor 21 through the lead wire intermediate 40a. A foamed urethane resin 39 is shown (to be described later). Referring to Figures 1A and IB showing the tip receiver assembly 100 in detail, a rod receiver 32 fitted on the apex surface of the tip portion of the blade 1 is shown for a beam striking the tip end of the blade, and disc receivers 31a, 31b fixed to the opposite lateral surfaces of the tip end portion, so that the beam strikes the opposite sides of the tip end portion of the blade. The rod receiver 32 is preferably made of Cu- alloy while the disk receivers 31a, 31b are preferably made of stainless steel, although both can be made of any electrically conductive material. The base plate 30 is made of an electrically conductive material, and is embedded within the tip end portion of the blade 1. As shown in Figure 1A, the rod receiver 32 is secured to the plate 30 of base on the side 1 of the extremity end of the blade by means of a rod 32a, and as shown in Figure IB, the disk receivers 31a, 31b are screwed to the opposite side of the base plate 30, respectively , (referred to as screw parts 38a, 38b) so as to be fixed thereto. As shown in Figure 1A, the base plate 30 is connected to the down conductor 21 through the intermediate of a connection terminal portion 36. In addition, the down conductor is retained by an FRP fastener 35. As shown in Figure IB, as the receiver assembly in which the rod receiver 32 and both side disc receivers 31a, 31b are fixed to the base plate 30, an adhesive 37 is filled in the interior of the shell Ib on the belly side and the shell on the rear side around the base plate 30, and consequently, the base plate 30 is placed and fixed on the blade 1. With the aforementioned configuration, filling the adhesive 37 in the space internal in the blade in proximity to the receiver assembly that includes the periphery of the base plate 30, the air in the inner sword is displaced so as to be replaced with the adhesive 37 and, consequently, it is possible to avoid increasing the air pressure in the internal space due to the expansion of the air in the internal space during the occurrence of a lightning strike on the blade 1.
In this way it is possible to prevent the occurrence of breakage of the blade caused by an increase in air pressure in the internal space. Further, since the belly side shell Ib and the shell of the back side of the blade are bonded together through the intermediate of the adhesive 37, it is thus possible to improve the strength of the blade 1. Furthermore, as shown in FIG. Figure IB, the left and right disc receivers 31a, 31b in the receiver assembly, which are screwed towards the opposite side parts of the base plate 30, are threaded to the latter, being displaced from each other in the direction of direction of blade rope 1. With this arrangement in which the disc receivers 31a, 31b are displaced along the outer surface of the blade 1, the disc receivers 31a, 31b can be easily adjusted on both the belly side and the back side of the blade 1 still in the thick blade-thin part so that the blade-pad part having small dimensions between the belly side shell Ib and the shell of the rear side. Additionally, as shown in Figure 2, still in this embodiment, since the tip receiving assembly 100 is provided closer to the tip end of the blade 1, than the main beam beam frame 41, the tip receiver assembly 100. it is provided in the tip end portion of the blade 1 in which no main beam frame 41 is present since resistance support is not required. In this way, the base plate 30 of the tip receiving assembly 100 can be easily embedded in the blade 1, and consequently, the tip receiver assembly 100 can be easily attached to an existing blade that does not have a beam protection device. , in addition to it. With this configuration, as shown in Figure 1A, the tip receiving assembly 100 is provided in the tip end portion of the blade 1 while the adhesive 37 is filled in the internal space around the base plate 30 in the closeness of the tip receiving assembly 100, and the foamed urethane resin 39 is filled in the inner space of the blade, except for the parts where the adhesive 37 is filled as shown in Figures 2 and 3. With this configuration, the adhesive 37 (at the tip end portion) and the foamed urethane resin 39 (other than the tip end portion) are filled in the inner space of the blade, through the entire length of the blade, it is possible to improve the effects to prevent the occurrence of expansion of air in the internal space of blade 1 during the lightning strike on blade 1, the occurrence of an increase in air pressure, and blade 1 breakage caused by it. The break of the blade by a ray is possibly caused not only by burning but also by an increase in air pressure in the blade, which expands when heated by the electric discharge inside the blade. Furthermore, in this case, in case a moisture penetrated in the blade is present due to dew, the increase in air pressure is accelerated due to a phase change of the liquid phase towards the gas phase thereof by heating, and consequently, the blade is preferably formed in the form that air (gas) and moisture move from the internal space of the blade as much as possible. In addition, the foamed urethane is used as a filler material, it is possible that it prevents the weight of the blade from being increased excessively, and therefore the air that is inevitably present in the blade is divided into a large number of parts, the number of parts affected by the occurrence of an electrical discharge caused by a beam, can be extremely small, and consequently, even when the pressure is increased, the pressure never exceeds the blade's resistance limitations. During the assembly of the beam projection device of a windmill blade, which is configured as shown above, the base plate 30 connected thereto with the down conductor 21 is inserted into the inner space of the blade 1, and the adhesive 37 is filled between the base plate 30 and the shells the and Ib external and then heals in a way to ensure the base plate 30 in the blade. Then, the receiver insertion holes are formed by piercing through the outer shells, Ib and the adhesive 37, and the rod receivers 32 and the disc receivers 31a, 31b are inserted into the receiver insertion holes and fix to base plate 30. As stated above, in view of the aforementioned embodiment, the rod receivers 32 and the countermeasures of counterbalancing disk against a beam, are secured and support the base plate 30 made of an electrically conductive material and embedded in the blade 1 so as to constitute the tip receiver assembly (receiver assembly) 100, and the base plate 30 is connected thereto with the ducts 21 below incorporating the lead wires 21, and consequently, the configuration of the device Ray projection is extremely simple. Further, since the rod receiver 32 and the disk receivers 31a, 31b are fixed and supported to the base plate 30 so as to be formed in a unitary body, the assembly of the lightning protection device to the blade 1 can be provided . In addition, the unit of the receiver assembly 100 (receiver assembly) can optionally be fitted to the parts such as the tip end part and the intermediate part in which a lightning is possibly caused, the handling thereof can be made satisfactory. INDUSTRIAL APPLICABILITY In accordance with the present invention, receivers adapted to be mounted on the tip end portion of the blade where the blade profile becomes small in particular can be easily assembled, and in addition, the device for protecting the blade can be provided. rays of a windmill blade, which can exhibit an effective countermeasure against an increase in blade pressure caused by a lightning strike on the blade, and the assembly method of the beam protection device.