JP2006274660A - Module frame for solar cell panel and solar cell module using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a module frame for a solar cell panel capable of fixing the frames combined at various angles easily and to provide a solar cell module using it. <P>SOLUTION: In this module frame for the solar cell panel constituted by combining a plurality of frames 1, 2, 3 arranged in an outer peripheral part of the solar cell panel, the frame 3 on one side among a pair of frames 2, 3 to be combined has a through hole 3-1 through which a tightening member 7 passes and the frame 2 on the other side has a channel part in which the tightening member 7 is inserted and which is formed along the frame 2. Concerning a shape of cross section crossing the longitudinal direction of the frame 2 orthogonally of the channel part, width is smaller than diameter of the tightening member 7, and length is larger than diameter of the tightening member 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a module frame for a solar cell panel, and particularly relates to a module frame for a solar cell panel corresponding to a triangular or trapezoidal solar cell panel having various angles and a solar cell module using the module frame.

  In recent years, with increasing interest in global environmental problems, new energy technology using natural energy has attracted attention. As one of them, interest in solar power generation systems using solar energy is increasing.

  As shown in FIG. 12, a large number of solar cell elements for converting sunlight into electric energy are arranged to form a solar cell module 20, and a large number of the solar cell modules 20 are arranged on a roof 22 of a house or factory to increase the indoor electric load. It covers electricity and sells surplus electricity to power companies. In such a solar power generation system, a method of placing a plurality of solar cell modules 20 on an installation table made by combining iron or aluminum rails called a frame 27 is generally used. The solar cell module is inclined with an inclination angle to improve power generation efficiency. A state in which the solar cell module 20 is mounted on the mount 27 is referred to as a solar power generation device.

  Hereinafter, the structure of the solar cell module manufactured by the laminate type manufacturing method will be described as an example.

  As shown in FIG. 13, the solar cell module 20 is provided with a light transmission plate 24 such as glass or resin on the light receiving surface, and a large number of solar cell elements 23 are provided on the light transmission plate 24 with EVA resin (Ethylene-Vinyl Acetate). A non-light-receiving surface which is a back surface thereof is laminated with a weathering film 26 such as a Teflon (registered trademark) film, PVF (polyvinyl fluoride), or PET (polyethylene terephthalate). It is a thing.

  As the solar cell element 23, for example, a single crystal, polycrystal, or amorphous material such as a compound semiconductor made of silicon-based semiconductor or gallium arsenide is used, and electrically connected in series and / or in parallel. A junction box 19 made of synthetic resin such as ABS resin or aluminum metal is bonded to the back surface of the solar cell module 20, that is, on the weather resistant film 26, and connected to a terminal for taking out the output power of the solar cell module 20. Output is taken out by the transmission line.

  Furthermore, the light transmitting plate 24, the solar cell element 23, and the weather resistant film 26 are attached to a rectangular solar cell panel in which the module frame 21 made of an aluminum material, resin, or the like is sandwiched around each side of the rectangular solar cell panel. The solar cell module 20 is configured to serve as a fixing portion for installation. Moreover, the module frame 21 is useful also for the purpose of the edge improvement of the solar cell module 20, and the intensity | strength improvement which raises the whole intensity | strength. Usually, the module frame 21 uses a plurality of frames having a uniform cross section formed mainly by extrusion molding of aluminum.

  Some frames are fixed via an auxiliary member such as a connecting plate. However, in the case of a rectangular solar cell module, generally a right angle portion is formed as shown in FIG. In the adjacent frame 31 and frame 33, at the time of extrusion molding, one of the frames 31 is formed with a rib and a screw hole 32 for a tapping screw at the tip thereof, and the other frame 33 is machined or pressed by post-processing. It is fixed by screwing with a tapping screw 34 through the formed through hole 35.

  On the other hand, many Japanese houses have a dormitory roof shape, and in the case of a dormitory, the shape of the roof surface is triangular or trapezoidal. FIG. 15 shows a diagram in the case where general rectangular solar cell modules 42 are arranged on a trapezoidal ridge roof 41.

  According to this, a blank space where a module cannot be placed remains in a triangular shape in the corner ridge portion 43, which is a limitation on the appearance design and the solar cell installation area.

  Therefore, as shown in FIG. 16, in recent years, rectangular solar cell modules 52 are arranged on the dormitory roof 51 for the purpose of improving the appearance design of the solar cell modules and increasing the solar cell installable area in the roof area. There is an example in which a solar cell module 53 having a triangular shape is created in the remaining space of the corner building.

  However, even in the same dormitory, the angle of the roof varies, and one triangular angle does not fit all the dormitory roofs. Therefore, it is necessary to produce several triangular modules with different angles.

  Further, unlike the rectangular module described above, the triangular module is not formed at a right angle between two adjacent frames. Therefore, the triangular module is formed by extruding one of the two adjacent frames as shown in FIG. Further, in the structure in which the screw hole for tapping screw is formed, the screw tightening direction and the screw hole direction do not match, so the screw hole by extrusion cannot be used.

  Therefore, as a solution, as shown in FIG. 17, a fixing member 61 made of, for example, stainless steel having a threaded hole processing portion and matching the angle with an acute angle portion or an obtuse angle portion is placed inside the frame 62 and fixed with screws. The method of doing is devised.

  However, the above method is a manufacturing insertion work (for example, when actually assembling a solar cell, the screw hole of the guide member and the screw hole of the solar cell frame are accurately aligned, and a screw is inserted from the back surface portion of the frame. Work), positioning, and the like are necessary, and there is a problem that the work becomes very complicated.

  In addition, compared to the rectangular module frame, the fixing member 61 is necessary and the cost of the member is increased. Since the fixing member 61 is manufactured according to the frame joining angle, it becomes a dedicated product for this angle. There is a problem that it cannot be used for frames with different angles. When manufacturing a large number of module frames with different angles, it is necessary to prepare a fixing member for each angle.

Therefore, as shown in FIG. 18, for example, a small dedicated module frame 63 having a substantially triangular shape and similar to a module outer frame having a screw hole is used, and through a through hole opened in the small dedicated module frame 63. A structure for fixing with bolts 64 has also been devised. (See Patent Document 1 and Patent Document 2)
Prior art document information related to the invention of this application includes the following.
Japanese Patent Laid-Open No. 10-12911 JP 2002-76422 A

  As shown in FIG. 18 described above, in the method of separately preparing the fixing member 63 that is a separate part and fixing the two adjacent frames using the fixing member 64, the fixing member 63 requires extra costs. Since the angle of the two frames is determined by the fixing member 63, when trying to manufacture a module frame of various angles, the number of types of the fixing member 63 increases by the number of angles, and in component manufacturing and component management This will take time.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a module frame for a solar cell panel capable of easily combining frames combined at various angles, and a solar cell module using the module frame. Is to provide.

  The module frame for a solar cell panel of the present invention is a module frame for a solar cell panel configured by combining a plurality of frames arranged on the outer peripheral portion of the solar cell panel. The frame has a through-hole through which the fastening member passes, and the other frame has a groove portion formed along the frame into which the fastening member is inserted, and the groove portion has a cross section perpendicular to the longitudinal direction of the frame. Regarding the shape, the width is narrower than the diameter of the fastening member, and the length is longer than the diameter of the fastening member.

  Moreover, the module frame for solar cell panels of the present invention is characterized in that, in the module frame, the length of the groove is at least 5 times the diameter of the fastening member.

  Moreover, the module frame for solar cell panels of the present invention is characterized in that, in the module frame, the groove portion is constituted by two substantially parallel ribs.

  The module frame for a solar cell panel according to the present invention is characterized in that, in the module frame, both or one of the two substantially parallel ribs are coupled to each other.

  The module frame for a solar cell panel according to the present invention is characterized in that, in the module frame, an outer periphery having a cross-sectional shape perpendicular to the longitudinal direction of the frame is formed in a corrugated shape.

  And the solar cell module of this invention was equipped with the above-mentioned module frame for solar cell panels, and the solar cell panel by which this module frame for solar cell panels is attached to outer periphery, It is characterized by the above-mentioned.

  According to the present invention, in the module frame for a solar cell panel configured by combining a plurality of frames arranged on the outer peripheral portion of the solar cell panel, one of the pair of frames combined has a fastening member. The other frame has a groove portion formed along the frame, and the other frame has a groove portion formed along the frame, and the groove portion has a width with respect to a cross-sectional shape orthogonal to the longitudinal direction of the frame. Since the diameter of the fastening member is narrower and the length is longer than the diameter of the fastening member, the insertion region into which the fastening member is inserted can be secured as a line having a certain width instead of a point. Therefore, even if the angle formed by the combined frames is an acute angle or an obtuse angle, the frames can be easily coupled. The degree of freedom of the frames that can be combined is higher when the length of the groove portion is longer, and is preferably 5 times or more the diameter of the fastening member.

  In addition, when the groove portion is composed of two substantially parallel ribs, a part of the ribs are coupled to each other, thereby preventing an opening between the two ribs when the fastening member is inserted during the coupling. , It can prevent the bond from loosening.

  Further, since the outer periphery of the cross-sectional shape perpendicular to the longitudinal direction of the frame is formed in a corrugated shape, the amount of the fastening member increases when the fastening member is inserted at the time of joining, and the groove is joined more strongly. It becomes possible.

  Furthermore, the solar cell panel module frame is arranged on the outer peripheral portion of the solar cell panel, so that it is possible to supply a solar cell module with a small number of parts and at low cost and high reliability.

Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings schematically illustrated.

  FIG. 1 is an example of an exploded view of a triangular solar cell module using a module frame for a solar cell panel according to the present invention.

  In FIG. 1, 1 is a frame with a rib for the first side, 2 is a frame with a rib for the second side, 3 is a U-shaped frame for the third side, 6 is a solar cell panel, and 7 and 8 are fastened. A tapping screw as a member is shown.

  2 shows a cross-sectional view of the ribbed frame 1 for the first side and the ribbed frame 2 for the second side, and FIG. 3 shows a cross-sectional view of the U-shaped frame 3 for the third side.

  As shown in FIG. 1, the solar cell module according to the present invention includes a ribbed frame 1 for the first side and a ribbed frame 2 for the second side, which are arranged at the respective outer peripheral ends of the triangular solar cell panel 6. The third frame is composed of three module frames of a U-shaped frame 3 for the third side, and tapping screws 7 and 8 for joining the module frames.

  The first side ribbed frame 1 and the second side ribbed frame 2 have a cross-sectional shape shown in FIG. In other words, a U-shaped outer shape and two ribs 1-1 of a first rib and a second rib in a direction substantially parallel to the solar cell panel are provided inside the U-shaped outer shape. When viewed in a cross-sectional shape orthogonal to the longitudinal direction, a groove is formed. The U-shaped frame 3 for the third side has a U-shaped cross section as shown in FIG.

  Such a frame 1 with ribs for the first side, a frame 2 with ribs for the second side, and a U-shaped frame 3 for the third side are manufactured by extrusion molding such as aluminum or injection molding of resin. Through holes are manufactured by post-processing machining or pressing.

  FIG. 4 shows how the first side ribbed frame 1 and the third side U-shaped frame 3 are brought into contact with each other and fixed with a tapping screw 7.

  In the module frame according to the present invention, the groove portion in FIG. 2 is formed so that the width (length in the vertical direction in FIG. 2) is narrower than the diameter of the tapping screw 7 and the length (length in the horizontal direction in FIG. 2). Is longer than the diameter of the tapping screw 7, so that the first side rib-attached frame is connected to the first side rib-attached frame 1 and the third side U-shaped frame 3 as shown in FIG. The end of the frame 1 is cut off in accordance with the shape of the solar cell panel, and the tip of the tapping screw 7 has two ribs 1-1 through the through hole 3-1 provided in the U-shaped frame 3 for the third side. Then, by inserting the tapping screw 7, a female screw is formed on the rib 1-1 and can be screwed. The U-shaped frame 3 serving as the third side is also coupled with the ribbed frame 2 serving as the second side in the structure of FIG. In this way, the screw can be tightened at any of the right angle, acute angle, and obtuse angles. If the length of the groove is set to be not less than 5 times the diameter of the tapping screw 7, the width of the angle formed by the frames 2 and 3 can be increased.

  As a result, as shown in FIG. 1, a solar cell panel module module frame is formed by attaching the solar cell panel 6 to the inside of each frame by bonding, packing, or the like inside each frame.

  Furthermore, in the module frame of the present invention, as shown in FIG. 5A, when the cutting angle of the ribbed frame 1 is set to a right angle, a rectangular solar cell module can be produced. If it is cut as in (), it is possible to produce an acute angle connection. Furthermore, if the cutting angle is reversed as shown in FIG. 5D, an obtuse angle connection can be manufactured.

  As described above, according to the module frame of the present invention, two frames can be joined freely from an acute angle to an obtuse angle simply by changing the cut-off angle of the end face of the ribbed frame 1 without using special parts. I can do it. It is also possible to easily process the solar cell module into a triangular or trapezoidal shape that matches the customer's roof shape.

  Also, the adjustment of the joining angle is possible only by changing the cut angle at the end of the ribbed frame 1, and the joining is also done by screws, so automation is easy. Therefore, it is easy to build an automatic design system using a computer, and to design and produce fully-automatic and custom-made modules with triangular and trapezoidal shapes that match the roof shape of the customer's house. Even in that case, since only the ribbed frame 1 and the U-shaped frame 3 are necessary for creating the module frame, each frame is stored in a long length and is cut out and used when producing the module frame. For example, the cost of the entire module frame can be reduced without wasting material.

  The third side frame 3 according to the present invention is not limited to the U-shaped cross section as described above, and there is no problem even if it is a flat plate.

  Further, by making a plurality of through holes 3-1, it is possible to increase the fastening force by increasing the number of screws.

  FIG. 6 shows a cross section of another module frame according to the present invention.

That is, the module frame shown in FIG. 6 has a U-shaped outer shape and two ribs, that is, a first rib 151 and a second rib 152 in a direction substantially parallel to the solar cell panel. Further, the two ribs 151 and 152 are connected to each other by another rib 153 that intersects them substantially perpendicularly at the tip portion.

  By adopting such a structure, the strength of the fastening portion is increased, and the two ribs are not opened when screwed, resulting in poor fastening and the long-term solar cell module of 10 years or more. It is possible to prevent the fastening force from being weakened even by use.

  The other ribs 153 that intersect the two ribs 151 and 152 in a substantially vertical direction may be the tip portions of the ribs 151 and 152 as described above, and depending on the size, the tip portion that does not need to be hit by the fastening member. It may be near the center other than.

  FIG. 7 shows a cross section of another module frame according to the present invention.

  That is, the module frame shown in FIG. 7 has a U-shaped outer shape and two ribs, a first rib 161 and a second rib 162 in a direction substantially parallel to the solar cell panel, Further, the two ribs 161 and 162 are connected to the outer shape portion of the module frame at other ribs 163 that are in contact with each other at a substantially vertical end.

  By adopting such a structure, the strength of the fastening portion is increased, and the two ribs are not opened when screwed, resulting in poor fastening and the long-term solar cell module of 10 years or more. It is possible to prevent the fastening force from being weakened even by use.

  It should be noted that the position of providing another rib 163 that is in contact with the two ribs 161 and 162 substantially perpendicularly may be at the tip of the ribs 161 and 162 as described above, or near the center other than the tip.

  FIG. 8 shows a cross section of another module frame according to the present invention.

  That is, the module frame shown in FIG. 8 has a U-shaped outer shape and two ribs, a first rib 171 and a second rib 172, in a direction substantially parallel to the solar cell panel. The first rib 171 and the second rib 172 are passed through the tips of the ribs 173 that connect both sides of the U-shaped outer shape.

By adopting such a structure, the strength of the fastening portion is increased, and the two ribs are not opened when screwed, resulting in poor fastening and the long-term solar cell module of 10 years or more. It is possible to prevent the fastening force from being weakened even by use. Note that the position where the rib 173 is provided may be the tip of the first rib 171 and the second rib 172 as described above. It may be near the center of the second rib 172.

  The module frame as shown in FIGS. 6, 7, and 8 can be manufactured at low cost by extrusion molding of aluminum or the like or injection molding of resin.

  If the module frame shown in the cross-sectional structure shown in FIG. 2 or the like has a small amount of screw catching, the distance between the two ribs can be reduced. When manufacturing screws by rolling, a large force is applied to the ribs, which can damage the ribs, or conversely, a large force can be applied to the screws, yielding the male screw and causing poor fastening. There is also sex.

  Therefore, as shown in FIG. 9, if one of the two ribs of the first rib 181 and the second rib 182 is extruded into a corrugated shape, the screw and the rib on one side are near the top of the wave. Therefore, it is possible to prevent a large force from being applied to the screw and the rib. Furthermore, by making the distance between the wave tip and the other rib smaller than in the case of FIG. 9, it is possible to increase the applied amount of the screw and to tighten the screw more strongly.

  Furthermore, as shown in FIG. 10, it is possible to further secure the amount of screws by extruding the inner side of both the first rib 191 and the second rib 192 into a corrugated shape. It is.

  Moreover, as shown in FIG. 11, the inner side of both of the two ribs of the first rib 201 and the second rib 202 is processed into a corrugated shape, and the corrugated shape is formed inside the module frame (at the end of the rib). It is also desirable to make the pitch of the wave shape finer as the pitch of is increased and the outer side of the module frame (the base side of the rib) is advanced.

  According to this method, when the screw is used to enter obliquely between the two ribs from the side with the large wave pitch, the tip fits into the large wave gap and is positioned immediately before the screw tightening. Therefore, it is difficult for the screw to be misaligned immediately before the tapping screw is cut or rolled to form the female screw, and it is possible to prevent a screw fastening failure due to the screw fastening operation. Also, in the initial stage of screwing, since the number of waves that come into contact is small, the screwing torque can be reduced. Therefore, an excessive force is applied from the beginning during screw tightening, and the screw head is destroyed or lost by skipping the screw. It is possible to prevent problems such as Further, the corrugated structure shown in FIGS. 9 to 11 can be made to have a higher screw tightening strength by being used in combination with the rib reinforcing structure as shown in FIGS.

  Furthermore, since the module frame according to the present invention is attached to the outer peripheral portion of the solar cell panel, a large number of fixing members and the like that match the angle of the solar cell panel are not required, so that the number of parts is reduced and the manufacturing method is simplified. Therefore, it is possible to supply an inexpensive and highly reliable solar cell module.

It is an example of the exploded view of the triangular solar cell module using the module frame which concerns on this invention. Sectional drawing of the frame with a rib for the 1st sides concerning the present invention and the frame with a rib for the 2nd side is shown. FIG. 3 is a sectional view of a U-shaped frame for a third side according to the present invention. It is the figure which showed a mode that the frame with a rib for 1st sides and the U-shaped frame for 3rd sides were fixed with a tapping screw. (A) is a figure which shows the case where the module frame which concerns on this invention is comprised so that frames may connect at right angles, (b) is the module frame which concerns on this invention so that frames may connect an acute angle (large). The figure which shows the case where it comprises, (c) is the figure which shows the case where it comprises so that frames may connect the module frame which concerns on this invention to acute angle (small), (d) is the module frame which concerns on this invention between frames. It is a figure which shows the case where it comprises so that may connect at an obtuse angle. It is sectional drawing of another module frame which concerns on this invention. It is sectional drawing of another module frame which concerns on this invention. It is sectional drawing of another module frame which concerns on this invention. It is sectional drawing of what made one inner side of the rib of the frame with two ribs which concerns on this invention wavy shape. It is sectional drawing of what made the inner side of both ribs of the frame with two ribs which concerns on this invention into a waveform. It is sectional drawing of the structure which made the front-end | tip of the rib the rough wave shape inside the rib of the two rib frame which concerns on this invention, and became a fine wave shape as it progresses to the root of a rib. It is an exploded view explaining joining of the frame 1 with a rib or the frame 2 with a rib, and the U-shaped frame 3 among the module frame connection structures which concern on this invention. It is a figure which shows the structure of a general solar cell module. It is the figure shown about the general method of fixing two adjacent frames with a screw. It is the figure which showed an example at the time of installing a rectangular-shaped solar cell module in a trapezoidal roof. It is the figure which showed an example at the time of installing the rectangular and triangular solar cell module in a trapezoidal roof. It is a figure which shows an example of the conventional method of fixing a module frame to a triangular solar cell module. It is a figure which shows another example of the conventional method of fixing a module frame to a triangular solar cell module.

Explanation of symbols

1: Frame first side (frame with ribs)
1-1: Two rib structures of a frame with ribs 2: Frame second side (ribbed frame)
3: Frame third side (U-shaped frame)
3-1: Through-hole 6 of U-shaped frame: Solar cell module 7: Tapping screw 19: Junction box 20: Solar cell module 21: Module frame 22: Roof 23: Solar cell element 24: Light transmission plate 25: Sealing Stop material 26: Weather-resistant film 27: Rack 61: Connecting member 62: Module frame 63: Small dedicated module frame 64: Bolts 151, 161, 171, 181, 191, 201: First ribs 152, 162, 172, 182 192, 202: second rib 153: rib 163 connecting the first rib 151 and the tip of the second rib 152 163: rib 173 connecting the tip of the first rib or the second rib and the U-shaped module frame : Ribs that connect the tips of the first and second ribs to the U-shaped module frame

Claims (6)

In the module frame for solar cell panels configured by combining a plurality of frames arranged on the outer periphery of the solar cell panel,
Of the pair of frames to be combined, one frame has a through hole through which a fastening member passes, and the other frame has a groove portion formed along the frame into which the fastening member is inserted. A module frame for a solar cell panel, characterized in that the width of the cross section perpendicular to the longitudinal direction of the frame is narrower than the diameter of the fastening member and longer than the diameter of the fastening member. The module frame for a solar cell panel according to claim 1, wherein the length of the groove is at least five times the diameter of the fastening member. The said groove part is comprised by two substantially parallel ribs, The module frame for solar cell panels of Claim 1 or Claim 2 characterized by the above-mentioned. The module frame for a solar cell panel according to claim 3, wherein both or one of the two substantially parallel ribs is bonded to each other. 5. The solar cell panel module frame according to claim 1, wherein the groove has a corrugated outer periphery having a cross-sectional shape orthogonal to the longitudinal direction of the frame. A solar cell module comprising: the module frame for a solar cell panel according to any one of claims 1 to 5; and a solar cell panel to which the module frame for the solar cell panel is attached to an outer periphery.

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