JP2011249508A - Grounding method of photovoltaic power generation module - Google Patents
Grounding method of photovoltaic power generation module Download PDFInfo
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- JP2011249508A JP2011249508A JP2010120352A JP2010120352A JP2011249508A JP 2011249508 A JP2011249508 A JP 2011249508A JP 2010120352 A JP2010120352 A JP 2010120352A JP 2010120352 A JP2010120352 A JP 2010120352A JP 2011249508 A JP2011249508 A JP 2011249508A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
Description
本発明の太陽光発電モジュールのアース接地方法に関し、水平な又は傾斜した設置面上に金属製架台を介して設置される太陽光発電モジュールをアース接地する方法に関する。 The present invention relates to a method for grounding a solar power generation module according to the present invention, and relates to a method for grounding a solar power generation module installed on a horizontal or inclined installation surface via a metal mount.
従来から、太陽光発電モジュール（以下、発電モジュールということもある）は、地上や屋上や傾斜屋根などの水平な又は傾斜した設置面上に金属製架台を介して設置される。架台は、複数の縦ラックと、これら縦ラックの上に固定される複数の横ラックとで構成されている。複数の発電モジュールを横方向に並べたモジュール列の各々は、２条の横ラックにより両端支持する状態に設置される。 Conventionally, a photovoltaic power generation module (hereinafter also referred to as a power generation module) is installed on a horizontal or inclined installation surface such as the ground, a rooftop, or an inclined roof via a metal mount. The gantry includes a plurality of vertical racks and a plurality of horizontal racks fixed on the vertical racks. Each of the module rows in which a plurality of power generation modules are arranged in the horizontal direction is installed in a state where both ends are supported by two horizontal racks.
発電モジュールは、発電パネルと、この発電パネルの外周を保持するアルミニウム製の外周枠とを有し、この外周枠をアース接地することが必要である。複数の横ラックは金属片を介して接続することで電気的に接続され、この電気的に接続された横ラック接続体の各々は導線により予め地面にアース接地される。そのため、各発電モジュールの外周枠を何れかの横ラックに電気的に接続することで、各発電モジュールをアース接地することができる。 The power generation module has a power generation panel and an aluminum outer peripheral frame that holds the outer periphery of the power generation panel, and the outer peripheral frame needs to be grounded. The plurality of horizontal racks are electrically connected by being connected through metal pieces, and each of the electrically connected horizontal rack connectors is grounded to the ground in advance by a conductive wire. Therefore, each power generation module can be grounded by electrically connecting the outer peripheral frame of each power generation module to one of the horizontal racks.
次に、従来の発電モジュール１０Ａのアース接地方法について説明する。
図５に示すように、発電モジュール１０Ａの外周枠１２Ａの底部に、発電モジュール１０Ａの設置面Ｓと平行なフランジ部５０が設けられ、このフランジ部５０が横ラック３Ａの横支持板７Ａ上に載置される。
Next, a conventional grounding method for the power generation module 10A will be described.
As shown in FIG. 5, a flange portion 50 parallel to the installation surface S of the power generation module 10A is provided at the bottom of the outer peripheral frame 12A of the power generation module 10A, and this flange portion 50 is placed on the horizontal support plate 7A of the horizontal rack 3A. Placed.
発電モジュール１０Ａの取り付け時に、各発電モジュール１０Ａの横幅方向の中央部位において、前記のフランジ部５０と横ラック３Ａの横支持板７Ａとにドリルで下穴５１を穿孔し、その両下穴にアースビス５２を上面側から挿通・螺合させて、各発電モジュール１０Ａと横ラック３Ａを電気的に接続する。ここで、上記のアースビス５２としては、特許文献１，２に開示されているような種々のネジ部材を適用することができる。 When the power generation module 10A is attached, a pilot hole 51 is drilled in the flange portion 50 and the horizontal support plate 7A of the horizontal rack 3A at the central portion in the horizontal width direction of each power generation module 10A, and ground screws are provided in both the pilot holes. The power generation modules 10A and the horizontal rack 3A are electrically connected by inserting and screwing 52 from the upper surface side. Here, as the earth screw 52, various screw members as disclosed in Patent Documents 1 and 2 can be applied.
例えば、特許文献１の導通用緩み防止ネジは、ネジ軸部とネジ頭部を有し、この頭部に皿バネ形状のフランジが形成され、このネジ頭部の座面に複数の楔形状の突起部が設けられている。１対の鋼板を電気的に接続する際には、この緩み防止ネジを表側の鋼板のネジ挿通穴を挿通させて、裏面側の鋼板のネジ穴に螺合させる。このとき、複数の突起部により鋼板の絶縁被膜を削り取って、前記突起部を表側の鋼板の素地に導通させる。 For example, a loosening prevention screw for conduction in Patent Document 1 has a screw shaft portion and a screw head, a conical spring-shaped flange is formed on the head, and a plurality of wedge-shaped flanges are formed on the seating surface of the screw head. A protrusion is provided. When electrically connecting a pair of steel plates, the loosening prevention screws are inserted through the screw insertion holes of the front steel plate and screwed into the screw holes of the rear steel plate. At this time, the insulating coating of the steel plate is scraped off by the plurality of protrusions, and the protrusions are electrically connected to the base of the steel plate on the front side.
特許文献２のネジ部品は、ネジ軸部とネジ頭部を有し、このネジ軸部には先端側から順にタッピンネジ部とネジ部が形成されている。ネジ頭部の座面には突起が設けられている。１対の金属板部材を電気的に接続する際には、このネジ部品を表側の金属板部材の貫通穴を挿通させて、裏面側の金属板部材の雌ネジ穴の内周面の塗装膜をタッピンネジ部で削り取りながらネジ穴に螺合する。これにより、ネジ部品を介して２枚の金属板部材を電気的に接続することができる。 The screw component of Patent Document 2 has a screw shaft portion and a screw head, and a tapping screw portion and a screw portion are formed in this screw shaft portion in order from the tip side. A protrusion is provided on the seating surface of the screw head. When electrically connecting a pair of metal plate members, the threaded parts are inserted through the through holes of the front side metal plate member, and the coating film on the inner peripheral surface of the female screw hole of the rear side metal plate member Is screwed into the screw hole while scraping off with the tapping screw part. Thereby, two metal plate members can be electrically connected via screw parts.
しかし、上記に示す従来の発電モジュールのアース接地方法では、発電モジュールの外周枠にアース接地用フランジ部を予め形成しておく必要があるため、発電モジュールの製造コストが高くなる。しかも、外周枠のフランジ部と、架台の横ラックの横支持板とにドリルにて下穴を穿孔しなければならないため、発電モジュールを設置する工事量が増し、労力と時間がかかり、コスト増を招く。 However, in the conventional grounding method for the power generation module described above, since the grounding flange portion needs to be formed in advance on the outer peripheral frame of the power generation module, the manufacturing cost of the power generation module increases. In addition, it is necessary to drill a pilot hole in the flange part of the outer peripheral frame and the horizontal support plate of the horizontal rack of the gantry, which increases the amount of work for installing the power generation module, increases labor and time, and increases costs. Invite.
さらに、アースビスを発電モジュールに対し垂直姿勢にして発電モジュールと金属製架台に取り付けるため、アースビスを締結するドライバーを、発電モジュールに対して垂直に使用することになる。このとき、ビット滑りなどにより、スクリュードライバーで発電モジュールの表面を傷つける虞があり、発電モジュールの品質低下を招く虞がある。 Further, since the ground screw is attached to the power generation module and the metal base in a vertical posture with respect to the power generation module, a driver for fastening the ground screw is used perpendicular to the power generation module. At this time, the surface of the power generation module may be damaged by a screw driver due to bit slipping or the like, and the quality of the power generation module may be deteriorated.
他方、特許文献１の緩み防止ネジは、穿孔機能がないため、アース接地する際には鋼板にネジ挿通穴やネジ穴を形成する必要がある。特許文献２のネジ部品も、穿孔機能を有する訳ではないため、接続対象の２枚の金属板部材にネジ挿通穴やネジ穴を形成する必要がある。そのため、ドリルによる穿孔の工事量が増え、コスト増が避けられない。 On the other hand, since the loosening prevention screw of Patent Document 1 does not have a punching function, it is necessary to form a screw insertion hole or a screw hole in the steel plate when grounding. Since the screw component of Patent Document 2 also does not have a punching function, it is necessary to form screw insertion holes or screw holes in the two metal plate members to be connected. For this reason, the construction amount of drilling with a drill increases, and an increase in cost is inevitable.
本発明の目的は、太陽光発電モジュールの製造コストと太陽光発電モジュールの設置コストを低減可能で、設置施工時間を短縮可能な太陽光発電モジュールのアース接地方法を提供することである。 An object of the present invention is to provide a grounding method for a solar power generation module that can reduce the manufacturing cost of the solar power generation module and the installation cost of the solar power generation module and can shorten the installation construction time.
請求項１の太陽光発電モジュールのアース接地方法は、水平な又は傾斜した設置面上に金属製架台を介して設置される太陽光発電モジュールをアース接地する方法において、前記太陽光発電モジュールを載置する金属製架台に形成した設置面と平行なビス挿通穴にアースビスを挿通させ、このアースビスの先端のドリルネジ部を前記太陽光発電モジュールの金属製外周枠に穿孔により螺合させて太陽光発電モジュールをアース接地することを特徴としている。 The method for grounding a solar power generation module according to claim 1 is the method of grounding a solar power generation module installed on a horizontal or inclined installation surface via a metal mount, wherein the solar power generation module is mounted. A ground screw is inserted into a screw insertion hole parallel to the installation surface formed on the metal base to be placed, and a drill screw portion at the tip of the ground screw is screwed into the metal outer frame of the solar power generation module by drilling. It is characterized by earthing the module.
請求項２の太陽光発電モジュールのアース接地方法は、請求項１の発明において、前記アースビスの頭部の座面に１又は複数の突起を予め形成しておき、このアースビスを取り付けるときに、前記突起により前記金属製架台の表面の皮膜を破って電気的に導通させることを特徴としている。 A grounding method for a photovoltaic power generation module according to a second aspect is the invention of the first aspect, wherein one or a plurality of protrusions are formed in advance on the seating surface of the head of the ground screw, and when the ground screw is attached, The protrusion is used to break the coating on the surface of the metal pedestal to make it electrically conductive.
請求項１の発明によれば、太陽光発電モジュールを載置する金属製架台に形成した設置面と平行なビス挿通穴にアースビスを挿通させ、このアースビスの先端のドリルネジ部を太陽光発電モジュールの金属製外周枠に穿孔により螺合させて太陽光発電モジュールをアース接地するので、アースビスを取り付けるだけで、太陽光発電モジュールを金属製架台を介してアース接地することができる。 According to the first aspect of the present invention, the ground screw is inserted into the screw insertion hole parallel to the installation surface formed on the metal mount on which the photovoltaic power module is placed, and the drill screw portion at the tip of the ground screw is inserted into the photovoltaic module. Since the photovoltaic power generation module is grounded by being screwed into the metal outer peripheral frame, the photovoltaic power generation module can be grounded via the metal mount simply by attaching an earth screw.
従って、太陽光発電モジュールの外周枠にアース接地用フランジ部を予め設ける必要がなくなるため、太陽光発電モジュールの製造コストを低減させることができるうえ、前記外周枠に予め下穴を形成する必要がないので、太陽光発電モジュール設置のためのコストを低減でき、施工時間を短縮できる。 Accordingly, since it is not necessary to previously provide a grounding flange portion on the outer peripheral frame of the photovoltaic power generation module, it is possible to reduce the manufacturing cost of the photovoltaic power generation module and to form pilot holes in the outer peripheral frame in advance. Therefore, the cost for installing the solar power generation module can be reduced, and the construction time can be shortened.
しかも、金属製架台側から金属製架台の設置面と平行方向なビス挿通穴にアースビスを挿入してアースビスを外周枠にネジ込むので、ビット滑りなどで太陽光発電モジュールを損傷するのを防止でき、モジュールの品質の低下を防止できる。アースビスは水平な又は傾斜した設置面と平行方向に取り付けられるため、アースビスと太陽光発電モジュールの外周枠及び金属製架台との接触部に雨水などが溜まりにくくなり、酸化被膜発生による導電性能の低下が発生しにくくなる。 Moreover, since the ground screw is inserted into the screw insertion hole parallel to the installation surface of the metal mount from the metal mount side and the ground screw is screwed into the outer frame, it is possible to prevent the photovoltaic power module from being damaged due to bit slipping or the like. It is possible to prevent deterioration of the module quality. Since the ground screw is mounted in parallel to the horizontal or inclined installation surface, rainwater and the like are less likely to collect at the contact area between the ground screw and the outer peripheral frame of the photovoltaic power generation module and the metal mount, resulting in a decrease in conductive performance due to the generation of an oxide film. Is less likely to occur.
請求項２の発明によれば、アースビスの頭部の座面に１又は複数の突起を予め形成しておき、このアースビスを取り付けるときに、突起により金属製架台の表面の被膜を破って電気的に導通させるので、金属製架台に対してアースビスを確実に電気的に接続することができ、太陽光発電モジュールの外周枠をアースビスを介して金属製架台に電気的に確実に接続することができる。 According to the invention of claim 2, one or a plurality of projections are formed in advance on the seating surface of the head of the ground screw, and when the ground screw is attached, the coating on the surface of the metal frame is broken by the projection to electrically Therefore, the ground screw can be reliably electrically connected to the metal gantry, and the outer peripheral frame of the photovoltaic power generation module can be reliably electrically connected to the metal gantry via the ground screw. .
以下、本発明を実施するための形態について実施例に基づいて説明する。 Hereinafter, modes for carrying out the present invention will be described based on examples.
先ず、水平な又は傾斜状の屋根面からなる設置面Ｓに太陽光発電モジュール１０を設置する為の金属製架台１について簡単に説明する。この金属製架台１は、地上や屋上や傾斜屋根の上に設置される。図１〜図３に示すように、金属製架台１は、縦方向（図１の左右方向）向きに延び且つ横方向（図１の紙面直交方向）に所定間隔おきに設置される複数の縦ラック２と、これらの複数の縦ラック２上に配置されて横方向向きに延び且つ縦方向に所定間隔おきに設置される複数の横ラック３とを主体として構成されている。 First, the metal mount 1 for installing the solar power generation module 10 on the installation surface S composed of a horizontal or inclined roof surface will be briefly described. The metal mount 1 is installed on the ground, on the roof, or on an inclined roof. As shown in FIGS. 1 to 3, the metal gantry 1 extends in the vertical direction (left-right direction in FIG. 1) and is installed in a plurality of vertical positions installed at predetermined intervals in the horizontal direction (direction orthogonal to the plane of FIG. 1). The rack 2 and the plurality of horizontal racks 3 which are arranged on the plurality of vertical racks 2 and extend in the horizontal direction and are installed at predetermined intervals in the vertical direction are mainly configured.
縦ラック２と横ラック３は、夫々、アルミニウム押し出し材の条材からなる。縦ラック２と横ラック３の表面には防蝕の為の酸化アルミニウムを主成分とする絶縁被膜が形成されている。縦ラック２と横ラック３の各交差部において、横ラック３は縦ラック２に対して１対の位置決め金具４により固定されている。横方向に延びる各列の複数の横ラック３は、各継目において導電接続片を介して導電接続され、その各列の横ラック接続体は導電線により予め地面にアース接地されている。 The vertical rack 2 and the horizontal rack 3 are each made of a strip of aluminum extruded material. On the surfaces of the vertical rack 2 and the horizontal rack 3, insulating coatings mainly composed of aluminum oxide for corrosion prevention are formed. At each intersection between the vertical rack 2 and the horizontal rack 3, the horizontal rack 3 is fixed to the vertical rack 2 by a pair of positioning brackets 4. The plurality of horizontal racks 3 in each row extending in the horizontal direction are conductively connected through conductive connecting pieces at each joint, and the horizontal rack connecting members in each row are grounded in advance to the ground by conductive wires.
横ラック３は、前記位置決め金具４で固定された底板５、この底板５に垂直に形成され横方向に延びる複数のリブ６ａ，６ｂ，６ｃ、図１の左側のリブ６ａ上に一体形成された横支持板７ａ、図１の右側のリブ６ｂ，６ｃ上に一体形成された横支持板７ｂ、この横支持板７ｂ上に垂直に一体形成された縦支持板８などを有するものである。 The horizontal rack 3 is integrally formed on a bottom plate 5 fixed by the positioning bracket 4, a plurality of ribs 6a, 6b, 6c formed perpendicularly to the bottom plate 5 and extending in the horizontal direction, and the left rib 6a in FIG. It has a horizontal support plate 7a, a horizontal support plate 7b integrally formed on the right ribs 6b and 6c in FIG. 1, a vertical support plate 8 integrally formed vertically on the horizontal support plate 7b, and the like.
横支持板７ａの図１の右端部分は、リブ６ａより横支持板７ｂの方へ延びて、その先端部には下方傾斜した傾斜受け部９ａが形成されている。横支持板７ｂの図１の左端部分は、中央のリブ６ｃよりも横支持板７ａの方へ延びて、その先端部には下方傾斜した傾斜受け部９ｂが形成されている。縦支持板８の右端面下部には、発電モジュール１０の外周枠１２を受け止めるＬ字状受部８ａが突出状に形成されている。 The right end portion of the lateral support plate 7a in FIG. 1 extends from the rib 6a toward the lateral support plate 7b, and an inclined receiving portion 9a that is inclined downward is formed at the tip portion thereof. The left end portion of the lateral support plate 7b in FIG. 1 extends toward the lateral support plate 7a rather than the central rib 6c, and an inclined receiving portion 9b that is inclined downward is formed at the tip portion thereof. An L-shaped receiving portion 8 a that receives the outer peripheral frame 12 of the power generation module 10 is formed in a protruding shape at the lower portion of the right end surface of the vertical support plate 8.
各発電モジュール１０の横方向の所定部位（例えば、中間点）に対応する位置において、横ラック３の縦支持板８の中段部には、アース接地用のアースビス２５が挿通される１つのビス挿通穴８ｂが形成されている。このビス挿通穴８ｂは、太陽光発電モジュール１０を載置する金属製架台１が設置される設置面Ｓと平行に形成されている。このビス挿通穴８ｂは、後述するアースビス２５のネジ軸部２６よりも僅かに大径に形成され、アースビス２５を挿通した状態においてネジ軸部２６の外周側には僅かな隙間が形成される。 At one position corresponding to a predetermined portion (for example, an intermediate point) in the horizontal direction of each power generation module 10, one screw is inserted into the middle stage of the vertical support plate 8 of the horizontal rack 3. A hole 8b is formed. The screw insertion hole 8b is formed in parallel with the installation surface S on which the metal mount 1 on which the photovoltaic power generation module 10 is placed is installed. The screw insertion hole 8b is formed to have a slightly larger diameter than a screw shaft portion 26 of the ground screw 25 described later, and a slight gap is formed on the outer peripheral side of the screw shaft portion 26 when the ground screw 25 is inserted.
次に、太陽光発電モジュール１０について説明する。
図１〜図３に示すように、発電モジュール１０は、発電パネル１１と、この発電パネル１１の外周部に取り付けられた金属製の外周枠１２などから構成されている。本実施例の外周枠１２はアルミニウム製のものであるが、アルミニウム以外の軽合金製とすることも可能である。外周枠１２の表面には酸化アルミニウムの絶縁性被膜が形成されている。この発電モジュール１０は、例えば、１．３ｍ×１．０ｍ程度のサイズに構成されている。発電パネル１１は、４〜５ｍｍ程度の厚さに形成され、太陽光のエネルギーを直接電力に変換するものである。
Next, the solar power generation module 10 will be described.
As shown in FIGS. 1 to 3, the power generation module 10 includes a power generation panel 11 and a metal outer peripheral frame 12 attached to the outer peripheral portion of the power generation panel 11. Although the outer peripheral frame 12 of this embodiment is made of aluminum, it can be made of a light alloy other than aluminum. An insulating film of aluminum oxide is formed on the surface of the outer peripheral frame 12. The power generation module 10 is configured to have a size of about 1.3 m × 1.0 m, for example. The power generation panel 11 is formed to a thickness of about 4 to 5 mm and directly converts sunlight energy into electric power.
発電モジュール１０の外周枠１２は、底板部１３と、縦板部１４とを有する。縦板部１４の上端部の内周部の係合溝１５には、発電パネル１１の外周部が係合されている。底板部１３の外周部分は縦板部１４よりも外周側へ突出し、この外周部分の先端部には上方へ突出する突起部１６が形成されている。 The outer peripheral frame 12 of the power generation module 10 has a bottom plate portion 13 and a vertical plate portion 14. The outer peripheral portion of the power generation panel 11 is engaged with the engaging groove 15 in the inner peripheral portion of the upper end portion of the vertical plate portion 14. The outer peripheral portion of the bottom plate portion 13 protrudes to the outer peripheral side with respect to the vertical plate portion 14, and a protruding portion 16 that protrudes upward is formed at the tip of the outer peripheral portion.
図１に示すように、発電モジュール１０の外周枠１２の底板部１３の右端部分が横ラック３の左側の横支持板７ａの上に載置支持され、この外周枠１２の底板部１３の右端部分が、外周枠１２の横方向の両端付近において、１対の固定機構１７により横ラック３に固定される。 As shown in FIG. 1, the right end portion of the bottom plate portion 13 of the outer peripheral frame 12 of the power generation module 10 is placed and supported on the horizontal support plate 7 a on the left side of the horizontal rack 3, and the right end of the bottom plate portion 13 of the outer peripheral frame 12 is supported. The portion is fixed to the horizontal rack 3 by a pair of fixing mechanisms 17 in the vicinity of both ends of the outer peripheral frame 12 in the horizontal direction.
固定機構１７は、リブ６ａ，６ｂ間に配置されて傾斜受け部９ａ，９ｂに下側から係合する下固定金具１８と、外周枠１２の突起部１６と１対の傾斜受け部９ａ，９ｂの上面を押える上固定金具１９と、この上固定金具１９の挿通穴１９ａを挿通して下固定金具１８に螺合された締結ボルト２１などで構成されており、外周枠１２の突起部１６を横ラック３に固定する。 The fixing mechanism 17 is disposed between the ribs 6a and 6b and engages with the inclined receiving portions 9a and 9b from below, and the protrusion 16 of the outer peripheral frame 12 and a pair of inclined receiving portions 9a and 9b. The upper fixing metal 19 that holds the upper surface of the upper fixing metal 19 and the fastening bolt 21 that is inserted into the insertion hole 19a of the upper fixing metal 19 and screwed into the lower fixing metal 18 are formed. Secure to the horizontal rack 3.
図１に示すように、外周枠１２の縦板部１４のうちの横ラック３の縦支持板８に対向する縦板部１４の図１の右端面の中段部には、前記挿通穴８ｂに対応する高さ位置において、横方向に延びるＶ溝２２が形成されている。このＶ溝２２は、発電モジュール１０をアース接地する際に、アースビス２５の先端部を係合させる為の溝である。このＶ溝２２は、例えば、深さは０．５ｍ程度、幅１〜３ｍｍ程度に形成されている。アースビス２５を装着する際に、アースビス２５の先端部のドリルネジ部２９の先端をＶ溝２２に係合させることでドリルネジ部２９の先端の上下方向への移動を規制し、ドリルネジ部２９による穿孔を安定的に行うことができる。 As shown in FIG. 1, in the middle step of the right end surface of FIG. 1 of the vertical plate 14 facing the vertical support plate 8 of the horizontal rack 3 in the vertical plate 14 of the outer peripheral frame 12, the insertion hole 8b is formed. A V-groove 22 extending in the lateral direction is formed at a corresponding height position. The V groove 22 is a groove for engaging the tip of the ground screw 25 when the power generation module 10 is grounded. For example, the V groove 22 is formed with a depth of about 0.5 m and a width of about 1 to 3 mm. When mounting the ground screw 25, the tip of the drill screw 29 at the tip of the ground screw 25 is engaged with the V groove 22 to restrict the vertical movement of the tip of the drill screw 29, and drilling by the drill screw 29 is performed. It can be performed stably.
次に、アースビス２５について説明する。
図４に示すように、アースビス２５は、金属製架台１の横ラック３と発電モジュール１０の外周枠１２を電気的に接続する為のものである。アースビス２５は、細長いネジ軸部２６と、ネジ軸部２６の基端部の頭部２７とを有する。ネジ軸部２６には、基端側から順に、ロッド部２８と、ドリルネジ部２９とが形成され、ドリルネジ部２９の先端部には穿孔用のドリル部３０が形成されている。ドリル部３０には、通常のドリルの先端と同様に、捩れた形状の複数の刃と溝が形成されている。アースビス２５は、縦支持板８と外周枠１２間の間隔よりも長く形成され、アースビスの外径は、例えば４ｍｍ〜５ｍｍ程度である。ドリルネジ部２９の長さは例えば１０〜２０ｍｍである。但し、前記のサイズに限定される訳ではない。
Next, the ground screw 25 will be described.
As shown in FIG. 4, the ground screw 25 is for electrically connecting the horizontal rack 3 of the metal mount 1 and the outer peripheral frame 12 of the power generation module 10. The ground screw 25 has an elongated screw shaft portion 26 and a head portion 27 at the base end portion of the screw shaft portion 26. In the screw shaft portion 26, a rod portion 28 and a drill screw portion 29 are formed in this order from the base end side, and a drill portion 30 for drilling is formed at the distal end portion of the drill screw portion 29. The drill portion 30 is formed with a plurality of twisted blades and grooves, similar to the tip of a normal drill. The ground screw 25 is formed longer than the interval between the vertical support plate 8 and the outer peripheral frame 12, and the outer diameter of the ground screw is, for example, about 4 mm to 5 mm. The length of the drill screw portion 29 is, for example, 10 to 20 mm. However, the size is not limited to the above.
アースビス２５の頭部２７の上面には、ドライバーで操作する為の十字溝３１が形成されている。頭部２７の座面３２には、円錐状の３つの突起３３が周方向に等間隔に形成されている。尚、突起３３は３つ形成されているが、この数に限定されず、３未満でもよく、４以上であってもよい。突起３３の形状は、円錐状に限定されず、縦支持板８の表面の絶縁皮膜を破ることが可能であれば、楔形状、角柱状、円柱状などの種々の形状の突起を採用してもよい。 On the upper surface of the head 27 of the ground screw 25, a cross groove 31 for operation with a screwdriver is formed. Three conical projections 33 are formed on the seat surface 32 of the head 27 at equal intervals in the circumferential direction. Although three protrusions 33 are formed, the number is not limited to this number, and may be less than 3 or 4 or more. The shape of the projection 33 is not limited to a conical shape, and various types of projections such as a wedge shape, a prismatic shape, a columnar shape, etc. are adopted as long as the insulating film on the surface of the vertical support plate 8 can be broken. Also good.
次に、太陽光発電モジュール１０のアース接地方法について説明する。
以上説明したように、水平又は傾斜した設置面Ｓ上に金属製架台１を介して複数の太陽光発電モジュール１０を設置した状態において、前記各発電モジュール１０に対応するビス挿通穴８ｂを予め横ラック３の縦支持板８に形成しておき、各発電モジュール１０の外周枠１２のうち前記の横ラック３の縦支持板８に対向する縦板部１４にはＶ溝２２を予め形成しておく。
Next, a method for grounding the solar power generation module 10 will be described.
As described above, in a state where a plurality of photovoltaic power generation modules 10 are installed on the horizontal or inclined installation surface S via the metal gantry 1, the screw insertion holes 8b corresponding to the respective power generation modules 10 are horizontally disposed in advance. A V-groove 22 is formed in advance in the vertical plate portion 14 which is formed on the vertical support plate 8 of the rack 3 and faces the vertical support plate 8 of the horizontal rack 3 in the outer peripheral frame 12 of each power generation module 10. deep.
各発電モジュール１０毎に、前記ビス挿通穴８ｂにアースビス２５を挿通させ、アースビス２５の先端のドリル部３０を発電モジュール１０のＶ溝２２に係合させる。次に、図２に示すように、ドライバーなどの工具を頭部２７の十字溝３１に係合させて、アースビス２５を回転させて、このアースビス２５のドリル部３０により外周枠１２に穿孔しながら、ドリルネジ部２９を螺合させる。このとき、外周枠１２を穿孔しながら螺合させるので、アースビス２５と外周枠１２とを電気的に確実に導通させることができる。 For each power generation module 10, the ground screw 25 is inserted into the screw insertion hole 8 b, and the drill portion 30 at the tip of the ground screw 25 is engaged with the V groove 22 of the power generation module 10. Next, as shown in FIG. 2, a tool such as a screwdriver is engaged with the cross groove 31 of the head 27, the ground screw 25 is rotated, and the outer peripheral frame 12 is drilled by the drill portion 30 of the ground screw 25. Then, the drill screw portion 29 is screwed. At this time, since the outer peripheral frame 12 is screwed while being drilled, the ground screw 25 and the outer peripheral frame 12 can be electrically connected reliably.
一方、アースビス２５の頭部２７の座面３２が横ラック３の縦支持板８の表面に強力に当接する状態になるまで、アースビス２５のドリルネジ部２９を螺合させ、頭部２７の座面３２に形成した３つの突起３３により、縦支持板８の金属被膜を破りながら締結回転させる。こうして、アースビス２５の頭部２７を横ラック３の縦支持板８の素地部分に電気的に導通させることができる。 On the other hand, until the seating surface 32 of the head 27 of the ground screw 25 is in a state where it strongly contacts the surface of the vertical support plate 8 of the horizontal rack 3, the drill screw portion 29 of the ground screw 25 is screwed together. The three protrusions 33 formed on 32 are fastened and rotated while breaking the metal film of the vertical support plate 8. Thus, the head 27 of the ground screw 25 can be electrically connected to the base portion of the vertical support plate 8 of the horizontal rack 3.
このように、各発電モジュール１０の外周枠１２をアースビス２５のドリルネジ部２９に電気的に接続し、アースビス２５の頭部２７を横ラック３の縦支持板８に電気的に接続するので、予めアース接地されている金属製架台１を介して、全部の発電モジュール１０をアース接地することができる。その後、図３に示すように、発電モジュール１０間の隙間を塞ぐ為のカバー部材３５を図示のように装着する。 As described above, the outer peripheral frame 12 of each power generation module 10 is electrically connected to the drill screw portion 29 of the ground screw 25 and the head 27 of the ground screw 25 is electrically connected to the vertical support plate 8 of the horizontal rack 3. All the power generation modules 10 can be grounded via the metal stand 1 that is grounded. Thereafter, as shown in FIG. 3, a cover member 35 for closing the gap between the power generation modules 10 is attached as shown.
次に、本発明の太陽光発電モジュール１０のアース接地方法の効果について説明する。
発電モジュール１０を載置する金属製架台１に形成した設置面Ｓと平行なビス挿通穴８ｂにアースビス２５を挿通させ、このアースビス２５の先端のドリルネジ部２９を発電モジュール１０の金属製外周枠１２に穿孔により螺合させて発電モジュール１０をアース接地するので、アースビス２５を取り付けるだけで、発電モジュール１０を金属製架台１を介してアース接地することができる。
Next, the effect of the grounding method for the photovoltaic power generation module 10 of the present invention will be described.
The ground screw 25 is inserted into a screw insertion hole 8 b parallel to the installation surface S formed on the metal mount 1 on which the power generation module 10 is placed, and the drill screw portion 29 at the tip of the ground screw 25 is inserted into the metal outer frame 12 of the power generation module 10. Since the power generation module 10 is grounded by being screwed into the ground, the power generation module 10 can be grounded via the metal mount 1 only by attaching the ground screw 25.
従って、発電モジュール１０の外周枠１２にアース接地用のフランジ部を設ける必要がなくなるため、発電モジュール１０の製造コストを低減させることができるうえ、発電モジュール１０の設置段階において、発電モジュール１０の外周枠１２にアース設置の為の下穴を形成する必要がないので、発電モジュール１０設置の為のコストを低減でき、施工時間を短縮できる。 Accordingly, since it is not necessary to provide a grounding flange portion on the outer peripheral frame 12 of the power generation module 10, the manufacturing cost of the power generation module 10 can be reduced and the outer periphery of the power generation module 10 can be reduced at the installation stage of the power generation module 10. Since it is not necessary to form a pilot hole for ground installation in the frame 12, the cost for installing the power generation module 10 can be reduced and the construction time can be shortened.
また、金属製架台１側から金属製架台１の設置面Ｓと平行なビス挿通穴８ｂにアースビス２５を挿入してアースビス２５を外周枠１２にネジ込むので、ビット滑りなどによる発電モジュール１０の損傷を防止でき、発電モジュール１０の品質の低下を防止できる。アースビス２５は水平な又は傾斜した設置面Ｓと平行に配置されるので、アースビス２５と発電モジュール１０又は金属製架台１との接触部に雨水などが溜まらずに、酸化被膜発生による導電率低下を抑制できる。 Further, since the ground screw 25 is inserted into the screw insertion hole 8b parallel to the installation surface S of the metal mount 1 from the metal mount 1 side and the ground screw 25 is screwed into the outer peripheral frame 12, the power generation module 10 is damaged due to bit slipping or the like. Can be prevented, and the deterioration of the quality of the power generation module 10 can be prevented. Since the earth screw 25 is arranged in parallel with the horizontal or inclined installation surface S, rainwater or the like does not collect in the contact portion between the earth screw 25 and the power generation module 10 or the metal mount 1, and the conductivity is reduced due to the generation of an oxide film. Can be suppressed.
アースビス２５の頭部２７の座面３２に１又は複数の突起３３を予め形成しておき、このアースビス２５を取り付けるときに、突起３３により金属製架台１の表面の被膜を破って電気的に導通させるので、アースビス２５を確実に金属製架台１に対して電気的に接続することで、発電モジュール１０をアースビス２５を介して金属製架台１に確実に電気的に接続できる。 One or more protrusions 33 are formed in advance on the seating surface 32 of the head 27 of the ground screw 25, and when the ground screw 25 is attached, the protrusion 33 breaks the coating on the surface of the metal gantry 1 and is electrically connected. Therefore, the power generation module 10 can be reliably electrically connected to the metal mount 1 via the ground screw 25 by reliably connecting the ground screw 25 to the metal mount 1.
そして、発電モジュール１０の外周枠１２の縦板部１４にＶ溝２２を予め形成し、このＶ溝２２にアースビス２５のドリル部３０の先端を係合させることで、ドリル部３０の先端の上下方向への移動を規制し、アースビス２５を所期の姿勢となるように取り付けることができる。 Then, a V groove 22 is formed in advance in the vertical plate portion 14 of the outer peripheral frame 12 of the power generation module 10, and the tip of the drill portion 30 of the ground screw 25 is engaged with the V groove 22, so The movement in the direction is restricted, and the ground screw 25 can be attached so as to assume the intended posture.
次に、前記実施例を部分的に変更した変更例について説明する。
［１］前記実施例の金属製架台１において、複数の横ラック接続体を何れかの特定の縦ラック２に夫々電気的に接続し、その特定の縦ラック２を地面にアース接地してもよい。
［２］その他、当業者であれば、本発明の趣旨を逸脱することなく、前記実施例の種々の変更を付加した形態で実施可能で、本発明はそのような変更形態を包含するものである。
Next, a modified example in which the above embodiment is partially modified will be described.
[1] In the metal gantry 1 of the above embodiment, even if a plurality of horizontal rack connecting members are electrically connected to any specific vertical rack 2 and the specific vertical rack 2 is grounded to the ground. Good.
[2] In addition, those skilled in the art can implement the present invention in various forms with various modifications without departing from the spirit of the present invention, and the present invention includes such modifications. is there.
本発明は、水平な又は傾斜した設置面上に金属製架台を介して設置される種々の構造の太陽光発電モジュールのアース接地方法に適用することができる。 The present invention can be applied to grounding methods for photovoltaic power generation modules having various structures that are installed on a horizontal or inclined installation surface via a metal mount.
Ｓ 設置面
１ 金属製架台
２ 縦ラック
３ 横ラック
８ 縦支持板
８ｂ 挿通穴
１０ 太陽光発電モジュール
１１ 太陽光パネル
１２ 外周枠
２２ Ｖ溝
２５ アースビス
２６ ネジ軸部
２７ 頭部
２８ ロッド部
２９ ドリルネジ部
３０ ドリル部
３３ 突起
S Installation surface 1 Metal base 2 Vertical rack 3 Horizontal rack 8 Vertical support plate 8b Insertion hole 10 Solar power generation module 11 Solar panel 12 Outer frame 22 V groove 25 Ground screw 26 Screw shaft portion 27 Head portion 28 Rod portion 29 Drill screw portion 30 Drill part 33 Projection
Claims (2)
前記太陽光発電モジュールを載置する金属製架台に形成した設置面と平行なビス挿通穴にアースビスを挿通させ、このアースビスの先端のドリルネジ部を前記太陽光発電モジュールの金属製外周枠に穿孔により螺合させて太陽光発電モジュールをアース接地することを特徴とする太陽光発電モジュールのアース接地方法。 In a method for grounding a photovoltaic power generation module installed on a horizontal or inclined installation surface via a metal mount,
A ground screw is inserted into a screw insertion hole parallel to the installation surface formed on the metal mount on which the photovoltaic power module is placed, and a drill screw portion at the tip of the ground screw is drilled in the metal outer peripheral frame of the photovoltaic power module. A grounding method for a photovoltaic module, wherein the photovoltaic module is grounded by screwing.
One or a plurality of protrusions are formed in advance on the seating surface of the head of the ground screw, and when the ground screw is attached, the film on the surface of the metal frame is broken by the protrusion to be electrically connected. The method for grounding a solar power generation module according to claim 1.
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