JP2011228574A - Terminal box for solar cell module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure stability when a support plate supports a terminal.SOLUTION: A terminal box 10 includes a first terminal 13 connected to an end of a first cable 11 for wiring a solar cell module, and a support plate 20 supporting the first terminal 13. In the support plate 20, a lance 24 bendable and resiliently locking the first terminal 13 is formed to protrude. Moreover, in the first terminal 13, a locking hole 25 is formed to penetrate, and the first terminal 13 is prevented from slipping off by a tip face in a protruding direction of the lance 24 which contacts a hole edge of the locking hole 25.

Description

  The present invention relates to a terminal box for a solar cell module.

  A conventional solar cell module terminal box is disclosed in Patent Document 1. This is configured to include a terminal connected to a terminal of a cable for wiring a solar cell module, a support plate that supports the terminal, and a lid member that covers the support plate. A protrusion is formed on the upper surface of the support plate, and a through hole is formed in the terminal. The terminal is pulled down on the support plate from above, and the protrusion is fitted into the through hole, whereby the terminal is held in a state of being prevented from being detached from the support plate.

JP 2004-63651 A

  By the way, according to the above-described conventional configuration, the cable connected to the terminal is pulled down onto the support plate together with the terminal, so that the cable has to be held between the support plate and the lid member. As a result, excessive stress acts between the support plate and the lid member as the cable tilts, and the lid member may open.

  On the other hand, for example, a method of using a lance widely used in the connector field as a means for locking the terminal has been considered. That is, by forming a lance that can be bent on the support plate, and by forming an insertion hole through the side of the box, and sliding a terminal with a cable from the insertion hole along the upper surface of the support plate The lance can be elastically fitted into the through hole of the terminal to prevent the terminal from coming off. In this case, since the cable is inserted into the insertion hole of the box, there is no possibility that the lid member opens. However, the lance used in the connector field has a locking projection at a position retracted from the front end surface in the protruding direction, and the locking projection locks the terminal. For this reason, as the size of the terminal is reduced, the locking projection also becomes small. When a shearing force is applied to the locking projection by pulling the cable strongly backwards, the locking projection is deformed and inadvertent from the through hole. There was a risk of falling out.

  The present invention has been completed based on the above circumstances, and an object thereof is to ensure stability when a terminal is supported on a support plate.

  As means for achieving the above object, the invention of claim 1 is for a solar cell module comprising a terminal connected to a terminal of a cable for wiring a solar cell module, and a support plate on which the terminal is supported. A terminal box, wherein the support plate is formed with a protruding lance that elastically locks the terminal, and a locking hole is formed through the terminal. It has a feature in that the terminal is prevented from coming off by contacting the tip end surface in the direction with the edge of the locking hole.

  According to a second aspect of the present invention, in the first aspect of the present invention, the tip surface in the protruding direction of the lance has an overhang shape that inclines in a direction to increase the locking force against the disconnection of the terminal. It has the characteristics.

  A third aspect of the invention is characterized in that, in the first or second aspect of the invention, the outer surface of the lance has a shape that is continuous without unevenness over the entire length in the protruding direction.

<Invention of Claim 1>
A lance protrudes from the support plate, a locking hole is formed through the terminal, and the tip of the lance protrudes in contact with the edge of the locking hole to prevent the terminal from coming off. Therefore, the shear distance in the terminal pulling direction can be increased. Accordingly, the structure is strong against shearing, and the terminal holding force is increased. As a result, the terminal can be stably supported by the support plate. Moreover, the latching state of a lance can be easily cancelled | released by pressing the front-end | tip part of a lance and making it extract from a latching hole.

<Invention of Claim 2>
Since the front end surface in the protruding direction of the lance has an overhang shape that inclines in a direction to increase the locking force against the disconnection of the terminal, the terminal holding force is further increased.

<Invention of Claim 3>
Since the outer surface of the lance has a shape that is continuous over the entire length in the protruding direction, the shape of the lance can be simplified, unlike the case where a locking projection is formed on the outer surface of the lance. The structure of the mold for molding can also be simplified.

The top view of the terminal box by the side of the positive electrode of Embodiment 1 AA sectional view of FIG. The expanded sectional view which shows the latching state of the lance with respect to the 1st terminal The top view which shows the state before attaching a 2nd terminal to a support plate The top view which shows the state which assembled | attached the 2nd terminal to the support plate. Side view showing a state in which the second terminal is assembled to the support plate The top view which shows the state which connected the diode to the 1st, 2nd terminal Bottom view showing a state where a diode is connected to the first and second terminals Plan view of support plate Bottom view of the first member Rear view of the first member Rear view of the second member Plan view of the negative side terminal box

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. The terminal box 10 for solar cell modules of Embodiment 1 has a plurality of wiring lines extending from the positive electrode side or the negative electrode side of each solar cell module when a plurality of solar cell modules (solar cell panels) (not shown) are connected in parallel. The connection box which collects the 1st cable 11 is illustrated. Hereinafter, the terminal box 10 on the positive electrode side will be described in detail.

  As shown in FIG. 1, the terminal box 10 includes an input side region where each first cable 11 is introduced, and one second cable 12 for supplying power to the load side via an inverter (not shown). It is divided into the output-side area to be derived. In the input region, the first terminal 13 is connected to the end of each first cable 11, and in the output region, the second terminal 14 is connected to the end of the second cable 12. The second terminal 14 includes a plurality of second terminal bodies 15 connected to the first terminals 13. In such a terminal box 10 on the positive electrode side, a backflow preventing diode 16 is installed between each first terminal 13 and each second terminal body 15, and current flows to the solar cell module side at night when power generation is not performed. Considered not to flow.

Specifically, the terminal box 10 includes a synthetic resin box main body 17 that can accommodate the first terminals 13 and the second terminals 14, and a synthetic resin cover (not shown) that covers the box main body 17. The box body 17 can be divided into a first member 18 and a second member 19. The first and second members 18 and 19 are abutted and connected to each other along a direction parallel to the extending direction of the first and second cables 11 and 12 (which is an axial direction and synonymous with the front-rear direction). In the following description, the end on the input side where the first cable 11 is introduced is the rear end, and the end on the output side where the second cable 12 is led out is the front end.
The first member 18 includes a rectangular flat plate-like support plate 20 that supports the first terminals 13 and the second terminals 14. The support plate 20 has a plurality of arrangement regions in the width direction in which the first terminals 13 and the second terminals 14 are arranged.

  Each first terminal 13 is made of a conductive metal and has a strip-shaped first terminal main body 21 and an open barrel-shaped first barrel 22 coupled to the rear end of the first terminal main body 21. . A core wire portion 23 exposed at the end of each first cable 11 is connected to the first barrel portion 22 by caulking. The first terminal body 21 is formed with a rectangular locking hole 25 into which a later-described lance 24 fits, and a small circle in which the connecting leg 26 of the diode 16 is inserted on the front end side of the locking hole 25. The first connection hole 27 is formed so as to penetrate therethrough. The first connection hole 27 and the locking hole 25 are arranged coaxially at the center in the width direction of the first terminal body 21.

  The second terminal 14 is made of a conductive metal, and includes a plurality of strip-shaped second terminal bodies 15, a connecting plate portion 28 that extends in the width direction while connecting the front ends of the second terminal bodies 15, and a connecting plate And an open barrel-shaped second barrel portion 29 that is coupled to the center portion in the width direction of the front end portion of the portion 28. The core part 23 exposed at the end of the second cable 12 is connected to the second barrel part 29 by caulking. Each second terminal body 15 is arranged to face each first terminal body 21 in the axial direction in a state where it is supported by the support plate 20.

  Each second terminal body 15 is formed with a small circular second connection hole 30 through which the other connection leg 26 of the diode 16 is inserted at a position coaxial with each first connection hole 27. Yes. A pair of small circular latch receiving portions 31 are formed through both ends of the connecting plate portion 28 in the width direction. Each latch receiving portion 31 is fitted with a small cylindrical latch projection 32 projecting from the support plate 20, whereby each second terminal 14 is positioned and fixed to the support plate 20. The latch receiving portion 31 is substantially the same shape and size as the second connection hole 30.

  The diode 16 is constituted by a rectangular block-shaped diode body 33 in which the periphery of the chip is molded with resin and a pair of pin-shaped connecting legs 26 extending in opposite directions from both front and rear ends of the diode body 33. . Each connection leg 26 is bent at a substantially right angle from a horizontal portion 34 extending along the axial direction, and an extended end of the horizontal portion 34, and the bent tip portion is inserted into the first and second connection holes 27 and 30. The vertical portion 35 is formed. Solder is deposited in the first and second connection holes 27 and 30, whereby the first and second terminals 13 and 14 and the diode 16 are solder-connected.

  As shown in FIG. 9, a first peripheral plate portion 36 is raised and formed at a portion excluding the front edge portion of the peripheral edge portion of the support plate 20. Specifically, the first peripheral plate portion 36 includes a pair of first side plate portions 37 located at both ends in the width direction and a first back plate portion 38 located at the rear end portion in the axial direction. Each first side plate portion 37 is formed with a pair of left and right attachment portions 39 protruding outward. A circular hole 40 is formed through the tip of the mounting portion 39 in the protruding direction, and a metal collar 41 is fitted into the circular hole 40. In addition, a slit hole 42 that is elongated in the axial direction is formed through the base end portion of the mounting portion 39 in the protruding direction. The attachment of the terminal box 10 to the attachment target is appropriately selected from either a method of fastening the collar 41 with a bolt (not shown) or a method of fastening the slit hole 42 with a binding band (not shown).

  On the inner side surface of each first side plate portion 37, a pair of left and right cover lock portions 43 for locking the cover are formed protruding inward. A gate-shaped cover receiving portion 44 that surrounds the cover lock portion 43 is formed on the inner side surface of each first side plate portion 37 over the entire height. Further, an elastic lock portion 45 that locks the second member 19 is formed at the front end portion of the inner side surface of each first side plate portion 37. The elastic lock portion 45 is configured to protrude slightly inward from the inner side surface of each first side plate portion 37 and then forward in parallel with the inner side surface, and can be bent and deformed inward and outward. A lock groove 46 that receives the mating lock portion 88 is formed at the front end portion of the elastic lock portion 45 by notching the back surface. The support plate 20 is formed with a punching hole 47 that is opened as the molding die for the elastic lock portion 45 and the cover lock portion 43 is pulled out (see FIG. 10).

  Further, as shown in FIG. 2, a streak-shaped tip lock receiving portion 48 extending in the width direction is formed at the center in the width direction of the rear end of the support plate 20. The tip lock receiving portion 48 is elastically locked to a tip lock portion 75 formed on a closing plate 72 of the second member 19 described later.

  As shown in FIG. 11, the first back plate 38 is formed with a plurality of first insertion holes 49 through which the first cables 11 pass. Each first insertion hole 49 has a circular shape with an opening diameter that is the same as or slightly larger than the diameter of each first cable 11, and is arranged in a row at regular intervals in the width direction. As shown in FIG. 9, the support plate 20 is formed with a cylindrical first cable penetration portion 50 through which each first cable 11 penetrates at a position coaxial with each first insertion hole 49. A first cable receiving portion 51 that is connected to the front end of the first cable penetration portion 50 and receives each first cable 11 is formed. A first partition wall 52 extending across the entire width of the support plate 20 is formed between each first cable receiving portion 51 and each first cable penetration portion 50. In addition, a separate first cable pressing portion 53 for pressing each first cable 11 from the front side is put on each first cable receiving portion 51 (see FIG. 1). Each first cable pressing portion 53 is locked to each first cable receiving portion 51 by a pair of locking protrusions 54 formed on each first cable receiving portion 51. Each of the first cable receiving portions 51 and the first cable pressing portions 53 has an inner peripheral surface with a semicircular cross section, and both the inner peripheral surfaces are continuously connected in a circular shape over the entire circumference due to the connection of both. One cable 11 is surrounded in a holding state in the circumferential direction.

  A neck portion 55 having a substantially rectangular flat plate shape is formed to protrude forward at the center in the width direction of the front end portion of the support plate 20. A second cable receiving portion 56 that receives the second cable 12 is formed in the center portion in the width direction of the front end portion of the neck portion 55 so as to penetrate in the axial direction. Similarly to the above, the second cable holding portion 56 is covered with a separate second cable holding portion 57 (see FIG. 1), and the second cable holding portion 57 is formed on the second cable receiving portion 56. The second cable 12 is clamped and held in a state of being locked to the second cable receiving portion 56 by the locking protrusion 57. The support plate 20 is formed with a die-cutting hole 58 as the molding dies of the locking projections 54 and 57 are pulled out (see FIG. 10).

  A plurality of raised portions 59 are formed to bulge between adjacent arrangement regions of the support plate 20. Each bottom raising portion 59 has a hollow prismatic shape, and both sides sandwiching the tip portions of the first and second terminal bodies 21 and 15 (the front end portion of the first terminal body 21 and the rear end portion of the second terminal body 15). Is arranged. That is, a plurality of the raised portions 59 are arranged in the width direction while being paired in the axial direction. Among these, a pair of opposing plates 60 that sandwich the tip portions of the first and second terminal bodies 21 and 15 between the bottom raised portions 59 are disposed outside the both sides of the bottom raised portions 59 located at both ends in the width direction. Has been. Between the bottom raised portions 59 facing each other in the axial direction of the support plate 20, a bridging plate portion 61 is formed across the entire width at a position facing the diode body 33.

  In each arrangement region of the support plate 20, a pair of window portions 62 are formed on both sides in the axial direction across the bridge plate portion 61. The window portion 62 has a rectangular shape that is long in the axial direction, and is disposed at a position facing the connection holes of the first and second terminals 13 and 14, and thereby the back surface side of the support plate 20 (first and second of the connection legs 26). The solder state of the connection leg 26 can be visually recognized from the side opposite to the insertion direction into the second connection holes 27 and 30. In addition, a second terminal pressing piece 63 capable of contacting the second terminal 14 is formed in a pair on both sides in the width direction at the front end portion of each arrangement region of the support plate 20. The second terminal pressing piece 63 rises from the support plate 20 and then is folded back to the support plate 20 side, and the folded end presses the connecting plate portion 28 of the second terminal 14 from the front side, The lifting of the two terminals 14 from the support plate 20 is restricted. In the support plate 20, a mold punching hole 64 is formed by opening the molding die for molding the second terminal pressing piece 63. The mold punching hole 64 is formed with a window 62 corresponding to the second terminal 14. It communicates (see FIG. 10).

  A lance 24 capable of elastically locking each first terminal 13 is formed in each arrangement region of the support plate 20. As shown in FIG. 3, the lance 24 has a shape that protrudes forward from the base end portion to the tip end portion and curves toward the cover side, and has a belt plate shape with no irregularities on the outer surface as a whole. When the lance 24 is in a natural state, the distal end portion of the lance 24 is arranged so as to gradually turn in the horizontal direction as it goes forward, and the distal end surface of the lance 24 has an overhang shape that gradually increases from the back side to the front side. Is formed. The lance 24 interferes with the first terminal main body 21 during the mounting process of the first terminal 13 and is bent and deformed to the back side with the base end portion as a fulcrum. The first terminal 13 is fitted and fitted in the locking hole 25 of the one-terminal body 21, thereby retaining the first terminal 13. At this time, the tip of the tip surface of the lance 24 abuts the front edge of the locking hole 25 in a line contact state, and the tip of the lance 24 is accommodated over substantially the entire width and height of the locking hole 25. As the mold for forming the lance 24 is pulled out, the support plate 20 is formed with a mold release hole 65, which communicates with the window 62 corresponding to the first terminal 13 ( See FIG.

  Guide portions 66 for guiding the sliding movement of the first terminal 13 are formed upright on both sides in the width direction across the lance 24 at the side edge of the die-cutting hole 65 in each arrangement region of the support plate 20. . The guide portion 66 is formed with a first terminal pressing piece 67 that protrudes inwardly by restricting the lifting of the first terminal 13 by coming into contact with both end portions in the width direction of the first terminal body 21 from the surface side. Further, as shown in FIG. 5, the bottom-up portion 59 corresponding to the first terminal 13 is brought into contact with both corners of the front end (front end) of the first terminal body 21 from the surface side so that the front end side of the first terminal 13 A first terminal tip pressing piece 68 that restricts the lifting is formed to protrude inward. Similarly, the raised portion 59 corresponding to the second terminal 14 is in contact with both corners of the front end (rear end) of the second terminal main body 15 from the surface side, thereby restricting the lifting of the second terminal 14 on the front end side. A two-terminal tip pressing piece 69 is formed to protrude inward. The first and second terminal tip pressing pieces 68 and 69 are formed as the window portion 62 is formed.

  A pair of rail receiving portions 70 extending in the axial direction along the both end edges are formed at both end edges in the width direction on the back surface side of the support plate 20. The rail receiving portion 70 has a concave groove shape, and communicates with a die-cutting hole 71 for forming a cover lock portion in the middle of the extending direction.

  As described above, the support plate 20 is provided with the respective mold release holes 65, 64 for lance molding, second terminal pressing piece molding, locking projection molding, cover lock section molding, and elastic lock section molding. 58, 71, 47 and the window portion 62 are formed to be opened, but are closed by the closing plate 72 of the second member 19.

  The closing plate 72 is disposed so as to overlap the support plate 20 in the thickness direction, and has a flat plate shape that is closed so as to cover the entire back surface of the support plate 20. The blocking plate 72 is thicker than the support plate 20. As shown in FIG. 4, a pair of rail portions 73 extending in the axial direction along the both end edges are formed at both end edges in the width direction on the surface side of the closing plate 72. The rail portion 73 has a convex shape and is configured to be unevenly fitted to the rail receiving portion 70. The second member 19 can be attached to the first member 18 by sliding the closing plate 72 along the plate surface of the support plate 20 while fitting the rail portion 73 to the rail receiving portion 70 in an uneven manner. .

  The peripheral edge of the closing plate 72 is bordered by ribs 74 extending along the peripheral edge except for a second peripheral plate 79 described later. When the first and second members 18 and 19 are connected, the support plate 20 is fitted and disposed inside the rib 74. Further, a front end lock portion 75 is formed at the rear end portion (the front end portion in the sliding direction) of the closing plate 72. As shown in FIG. 2, the distal end lock portion 75 includes a semicircular lock protrusion 76 that protrudes inward from the rib 74 and a horizontally long slit opening 77 that is cut along the inner edge of the rib 74 in the support plate 20. Thus, it can be bent and deformed inward and outward through the slit opening 77. When the first and second members 18 and 19 are connected, the lock protrusion 76 fits into the tip lock receiving portion 48, thereby preventing the rear end portion of the closing plate 72 from being lifted from the support plate 20.

As shown in FIG. 5, an opposing neck portion 78, to which the end portion of the second cable 12 is wired, protrudes and is formed at the center portion in the width direction of the rear end portion of the closing plate 72. The opposing neck portion 78 is disposed so as to overlap the neck portion 55.
A second peripheral plate portion 79 is raised and formed at a rear end portion excluding a portion corresponding to the first peripheral plate portion 36 in the peripheral portion of the closing plate 72. When the first and second members 18 and 19 are connected, the second peripheral plate portion 79 is continuous with the first peripheral plate portion 36 in the circumferential direction, and the peripheral wall 80 surrounding the box body 17 over the entire periphery is provided. It is configured. The second peripheral plate portion 79 includes a pair of left and right crank-shaped second side plate portions 81 positioned at both ends in the width direction, and a second back plate portion 82 that is positioned at the front end in the axial direction and rises from the tip of the opposing neck portion 78. .

  As shown in FIG. 12, a single second insertion hole 83 through which the second cable 12 is passed is formed through the central portion in the width direction of the second back plate portion 82. The second insertion hole 83 has a circular shape with an opening diameter that is the same as or slightly larger than the diameter of the second cable 12. As shown in FIG. 5, a cylindrical second cable penetration portion 84 through which the second cable 12 penetrates is formed in the opposing neck portion 78 at a position coaxial with the second insertion hole 83. The rear end of the second cable penetration portion 84 is open to the second partition wall 85 that is disposed across the entire width of the opposing neck portion 78. The second cable penetration portion 84 communicates coaxially with the second cable receiving portion 56 of the neck portion 55 via the second partition wall 85 when the first and second members 18 and 19 are connected.

  A pair of left and right finger hooks 86 bulge outwardly at the rear end of each second side plate portion 81. When the first and second members 18 and 19 are connected, it is possible to perform a sliding operation of the closing plate 72 with respect to the support plate 20 by pressing the finger hooking portion 86 with a finger. Further, as shown in FIG. 6, a pair of left and right convex portions 87 are formed at the rear end portion of each second side plate portion 81 so as to protrude forward (backward) from the finger hook portion 86. Yes. A concave portion (not shown) into which the convex portion 87 is fitted when the first and second members 18 and 19 are connected is formed at the front end portion of each first side plate portion 37. Further, a pair of left and right locking portions 88 is formed at the rear end portion of each second side plate portion 81 between the convex portion 87 and the finger hooking portion 86 in the axial direction and near the closing plate 72. . The lock portion 88 has a rib-like shape extending in the height direction along the inner surface of each second side plate portion 81 from the surface of the closing plate 72 and is elastically locked when the first and second members 18 and 19 are connected. The lock groove 46 of the part 45 is elastically fitted.

  On the other hand, in the terminal box on the load side, as shown in FIG. 13, a jumper 90 is installed between each first terminal body 21 and each second terminal body 15 in place of the diode 16. The rest of the configuration is the same as that of the terminal box 10 on the positive electrode side, and a detailed description thereof will be omitted.

  Next, a method for assembling the solar cell module terminal box 10 of the present invention will be described. Regarding the assembly on the first member 18 side, the first barrel portion 22 of the first terminal 13 is caulked and connected to the end of each first cable 11, and the first terminal 13 is slid to the support plate 20 in this state. . At this time, the first terminal 13 is inserted into the first insertion hole 49 together with the first cable 11, is pushed along the surface of the support plate 20, and passes through the first cable penetration part 50 and the first cable receiving part 51. After that, it interferes with the lance 24. The lance 24 that has interfered with the first terminal 13 is bent and deformed to the back surface side, and a pushing force is applied to the first terminal 13 as a reaction force. The first terminal 13 that has received the pushing-up force is restricted from being lifted by the first terminal pressing piece 67 and the first terminal tip pressing piece 68, and is guided by the guide portion 66 to slide with respect to the support plate 20. When the first terminal 13 is properly mounted, as shown in FIG. 3, the lance 24 is elastically restored and the tip end thereof is fitted into the locking hole 25, whereby the first terminal 13 is prevented from coming back backward. Retained. Further, the first terminal 13 is restricted from moving in the width direction by the guide portion 66, the bottom-up portion 59, and the counter plate 60. Further, when the first terminal 13 is properly attached, the first connection hole 27 is disposed at a position facing the window 62. Thereafter, the first cable holding portion 53 is attached to the first cable receiving portion 51, and the first cable 11 is sandwiched and held between the first cable receiving portion 51 and the first cable holding portion 53.

  On the other hand, regarding the assembly on the second member 19 side, the second cable 12 is inserted from the front into the second insertion hole 83 of the second back plate portion 82, and the end of the second cable 12 is pulled out rearward. Subsequently, as shown in FIG. 4, the second barrel portion 29 of the second terminal 14 is caulked and connected to the end portion of the second cable 12. At this time, since the rear of the second member 19 is opened, the second cable 12 can be smoothly pulled out from the opened portion and the caulking work can be easily performed. Next, the second terminal 14 connected to the second cable 12 is pulled down to the support plate 20. Then, as shown in FIG. 5, the locking protrusion 32 is fitted into the locking receiving portion 31 of the second terminal 14, and the second terminal pressing piece 63 is formed on the connecting plate portion 28 of the second terminal 14 from the surface side. The second terminal 14 is positioned and fixed to the support plate 20 by elastic contact. In addition, in the process of attaching the second terminal 14, the second terminal body 15 is tilted backward and lowered to the support plate 20 side, so that both side edges of the rear end of the second terminal body 15 are exposed from the surface side. The second terminal tip pressing piece 69 comes into contact with the second terminal 14 and the lifting of the second terminal 14 on the tip side is restricted. Thus, in the state in which the second terminal 14 is properly mounted, the second connection hole 30 is disposed at a position facing the window portion 62, and the second terminal body 15 is coaxial with the first terminal body 21 and is opposed to the first terminal body 21. To do. In addition, at an appropriate timing, the second cable pressing portion 57 is attached to the second cable receiving portion 56, and the second cable 12 is sandwiched and held between the second cable receiving portion 56 and the second cable pressing portion 57.

  Next, the diode 16 is pulled down to the support plate 20 side from the state in which the diode body 33 faces the bridge plate 61. Then, as shown in FIG. 7, with the diode 16 straddling between the first and second terminal bodies 21, 15, the front and rear connection legs 26 are connected to the first and second connection holes 27, 30 from the surface side. Inserted. Subsequently, the first and second connection holes 27 and 30 and the connection legs 26 are soldered to electrically connect them. The adhesion state (solder state) of the solder to each connection leg 26 is easily confirmed by looking into the window 62 from the back side of the support plate 20 as shown in FIG. The visual confirmation from the window 62 determines the quality of the solder state, and if it is confirmed that the solder state is appropriate, the operation of connecting the first and second members 18 and 19 is performed. In this case, the closing plate 72 is slid rearward along the back surface side of the support plate 20 while fitting the rail portion 73 to the rail receiving portion 70. Thus, when the first and second members 18 and 19 are properly connected, the lock portion 88 elastically locks the elastic lock portion 45 on both sides in the sliding direction, whereby the second member 19 becomes the first member. 18 is fixed. Further, the front end lock portion 75 elastically locks the front end lock receiving portion 48 at the front end in the sliding direction, so that the front end portion of the closing plate 72 in the sliding direction is restricted from being lifted from the support plate 20, and further in the sliding direction. The protrusions 87 are fitted into the recesses on both sides of the rear side, so that the rear end of the closing plate 72 in the sliding direction is restricted from being lifted from the support plate 20.

Subsequently, an insulating resin (potting material) is poured into the box body 17, and the solder connection portions of the connection legs 26 and the caulking connection portions of the first and second terminals 13 and 14 are hermetically sealed with resin. At this time, since the insulating resin is introduced inside the region surrounded by the closing plate 72, the peripheral wall 80, and the first and second partition walls 52 and 85, it is prevented from leaking outside. However, since the first and second members 18 and 19 are separate from each other, there is a possibility that the insulating resin leaks from the connecting portion between them. However, since the support plate 20 is surrounded by the rib 74 of the closing plate 72 at the connecting portion of the first and second members 18 and 19, and the rail receiving portion 70 and the rail portion 73 are unevenly fitted. The labyrinth structure formed by these prevents leakage of the insulating resin.
Finally, a cover is put on the box main body 17, and the cover is fixed to the box main body 17 by the locking action of the cover lock portion 43, and then the box main body 17 is fixed to an attachment target through the collar 41 or the slit hole 42. .

As described above, according to the present embodiment, the following effects can be obtained.
(1) Since the window portion 62 is formed in the support plate 20 so as to be opened, the solder state is visually confirmed through the window portion 62 from the insertion outlet side of each connection leg 26 to the first and second connection holes 27 and 30. be able to. Therefore, it is possible to avoid leaving the solder defective. Moreover, since the window part 62 is obstruct | occluded with the obstruction | occlusion board 72, when resin-sealing the inside of the box main body 17, it can prevent that insulating resin leaks out from the window part 62. FIG.
(2) As the closing plate 72 closes the window portion 62, the first and second peripheral plate portions 36 and 79 constitute the peripheral wall 80 that continuously surrounds the circumference, and therefore leakage of insulating resin In addition to providing the first and second peripheral plate portions 36 and 79 separately from the support plate 20 and the closing plate 72, the number of parts and the number of assembling steps can be reduced.
(3) Since the rail portion 73 of the closing plate 72 and the rail receiving portion 70 of the support plate 20 are concavo-convexly fitted to each other, the mounting operation of the closing plate 72 to the support plate 20 is guided, and an insulating resin box The outflow to the outside of the main body 17 is surely prevented by the uneven ridge.
(4) Since the distal end lock portion 75 of the closing plate 72 elastically locks the end portion of the support plate 20, it can be avoided that the distal end portion of the closing plate 72 in the sliding direction is opened from the support plate 20.
(5) Since the window 62 communicates with the die-cutting hole 65 resulting from the molding of the lance 24, a relatively large hole is opened in the support plate 20, and thus the inside of the box is sealed with resin. When stopping, air hardly stays in the hole (window portion 62 and die-cutting hole), and the air is released well.
(6) A lance 24 protrudes from the support plate 20, a locking hole 25 is formed through the first terminal 13, and the tip end surface of the lance 24 in the protruding direction is a hole edge of the locking hole 25. Since the first terminal 13 is prevented from coming off by coming into contact with the first terminal 13, the shear distance in the pulling direction of the first terminal 13 can be increased. Accordingly, the structure is strong against shearing and the terminal holding force is increased. As a result, the first terminal 13 can be stably supported by the support plate 20. Moreover, the latching state of the lance 24 can be easily released by pressing the distal end portion of the lance 24 from the front surface side and extracting the lance 24 from the latching hole 25.
(7) Since the tip end surface of the lance 24 in the protruding direction has an overhang shape that is inclined in a direction to increase the locking force against the first terminal 13 being pulled out, the terminal holding force is further increased.
(8) Since the outer surface of the lance 24 has a shape that is continuous without unevenness over the entire length in the protruding direction, the shape of the lance 24 is simplified, unlike the case where the protruding portion is formed on the outer surface of the lance 24. As a result, the structure of the mold for forming the lance 24 can be simplified.
(9) By passing the first and second cables 11 and 12 through the first and second insertion holes 49 and 83 of the first and second members 18 and 19, respectively, the first and second cables 11 and 12 are surrounded. Is surrounded by the first and second members 18 and 19 over the entire circumference, so that the first and second cables 11 and 12 are securely held by the first and second members 18 and 19, respectively. In addition, since the first and second members 18 and 19 have open wall surfaces facing the first and second insertion holes 49 and 83, the end of the second cable 12 is taken out from the open portion, and the second cable 12 and the second terminal 14 can be connected. Therefore, the peripheral wall 80 does not become an obstacle to the connection work, and the workability is excellent. On the other hand, when the first and second members 18 and 19 are united with each other, the peripheral wall 80 is formed, so that it is possible to put an insulating resin into the box body 17 and seal the resin.
(10) When the first and second members 18 and 19 are combined with each other, the closing plate 72 overlaps with the support plate 20, so that a structure (lance 24, lock portion 88, etc.) on the support plate 20 is formed. Thus, it is possible to close the die-cutting holes 65, 64, 58, 71, 47 that are inevitably opened by the closing plate 72. For this reason, for example, when the inside of the box main body 17 is resin-sealed, it is possible to prevent the insulating resin from leaking from the mold punching holes 65, 64, 58, 71, 47.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) As shown in the background art, the terminal box is provided corresponding to each of the plurality of solar cell modules that are DC-connected, and the first and second cables on the positive electrode side and the negative electrode side from each solar cell module. The first and second cables may be connected to the first and second terminals, and a diode may be installed between the first and second terminals.
(2) Similarly to the first terminal, the second terminal may be elastically locked by a lance.
(3) The form which covers only the part corresponding to the hole opened to a support plate may be sufficient as an obstruction board.

10. Terminal box (positive terminal box)
DESCRIPTION OF SYMBOLS 11 ... 1st cable 12 ... 2nd cable 13 ... 1st terminal 14 ... 2nd terminal 16 ... Diode (rectifier element)
DESCRIPTION OF SYMBOLS 18 ... 1st member 19 ... 2nd member 20 ... Support plate 24 ... Lance 25 ... Locking hole 26 ... Connection leg 27 ... 1st connection hole (connection hole)
30 ... Second connection hole (connection hole)
36 ... 1st surrounding plate part 49 ... 1st insertion hole 62 ... Window part 65 ... Die cutting hole (Die cutting hole for lance molding)
DESCRIPTION OF SYMBOLS 70 ... Rail receiving part 72 ... Closure board 73 ... Rail part 75 ... Tip lock | rock part 79 ... 2nd surrounding plate part 80 ... Perimeter wall 83 ... 2nd penetration hole 88 ... Lock part

Claims (3)

A terminal connected to the end of the cable for wiring the solar cell module;
A solar cell module terminal box comprising a support plate on which the terminals are supported,
A bending lance that elastically locks the terminal protrudes from the support plate, the locking hole penetrates the terminal, and a tip end surface in the protruding direction of the lance A terminal box for a solar cell module, wherein the terminal is prevented from coming off by contacting the edge of the locking hole.   The terminal box for a solar cell module according to claim 1, wherein a tip surface of the lance in a protruding direction has an overhang shape that is inclined in a direction to increase a locking force with respect to the removal of the terminal.   3. The terminal box for a solar cell module according to claim 1, wherein the outer surface of the lance has a continuous shape without unevenness over the entire length in the protruding direction.

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