JP2013048069A - Terminal box fixing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal box fixing structure which prevents excess adhesive from intruding to the opening side while ensuring the adhesive strength with an adequate amount of the adhesive.SOLUTION: A terminal box B has: a bottom plate 3 including a bottom surface 3a fixed to a fixed surface A with an adhesive C; openings 4 for external terminal connection which are formed at the bottom plate 3; and terminal parts 6 electrically connecting with external terminals 5. Each external terminal 5 and each terminal part 6 are connected through the opening 4. Further, a step part 11 is formed at a space between an application region G, positioned on at least one of the fixed surface A and the bottom surface 3a and to which the adhesive is applied, and a periphery 4b of the opening 4.

Description

  In the present invention, the terminal box has a bottom plate having a bottom surface fixed to the fixed surface with an adhesive, an opening for connecting an external terminal formed on the bottom plate, and a terminal to which the external terminal is electrically connected. And a terminal box fixing structure in which the external terminal and the terminal portion are connected through the opening.

  In the conventional terminal box fixing structure, the fixed surface and the bottom surface of the terminal box fixed to the fixed surface with an adhesive are formed with a flat flat surface over the entire surface (for example, Patent Document 1). reference).

JP 2011-14466 Gazette

For this reason, when an uncured adhesive is applied to the fixed surface or the bottom surface of the terminal box and the fixed surface and the bottom surface are bonded together, the excess adhesive extruded from between the fixed surface and the bottom surface May enter the opening side.
If the adhesive that has entered the side of the opening adheres to the external terminal or the terminal part, there is a possibility that an electrical connection failure between the external terminal and the terminal part may occur.
Further, when the terminal box has a movable operation member that can be switched between a connected state and a disconnected state between the terminal portion and the external terminal, the adhesive that has entered the opening side adheres to the movable operation member and is cured. Then, the operation of the movable operation member may be difficult.

In order to solve this problem, for example, the adhesive amount on the fixed surface or the bottom surface is reduced so that the amount of adhesive applied is reduced or the adhesive extruded from between the fixed surface and the bottom surface does not reach the opening. If the distance between the agent application area and the periphery of the opening is set large, the adhesive strength may be reduced.
The present invention has been made in view of the above circumstances, and a terminal box capable of preventing the excessive adhesive from entering the opening side while ensuring the adhesive strength with a sufficient amount of adhesive. The object is to provide a fixed structure.

  The first characteristic configuration of the terminal box fixing structure according to the present invention is that the terminal box includes a bottom plate having a bottom surface fixed to the fixed surface with an adhesive, an opening for connecting an external terminal formed on the bottom plate, A terminal portion to which an external terminal is electrically connected; the external terminal and the terminal portion are connected through the opening; and the adhesive on at least one of the fixed surface and the bottom surface A step portion is formed at a position between the application region to be applied and the periphery of the opening.

In the terminal box fixing structure of this configuration, a stepped portion is formed at a location between the application region to which the adhesive on at least one of the fixed surface and the bottom surface is applied and the periphery of the opening.
For this reason, even if a sufficient amount of adhesive is applied and the fixed surface and the bottom surface are bonded to each other, the flow of excess adhesive toward the opening can be prevented by the presence of the stepped portion.
Therefore, with the terminal box fixing structure of this configuration, it is possible to prevent the excessive adhesive from entering the opening side while ensuring the adhesive strength with a sufficient amount of adhesive.

  According to a second characteristic configuration of the present invention, the step portion is formed by providing a convex surface portion protruding from the bottom surface on the bottom surface.

  If it is this structure, the flow of the excess adhesive agent is blocked by the convex surface part which protrudes from the bottom face of a terminal box, and the penetration | invasion to the opening part side of an excess adhesive agent can be prevented.

  A third characteristic configuration of the present invention is that the step portion is formed by providing a concave surface portion that is recessed from the bottom surface on the bottom surface.

  If it is this structure, an excessive adhesive agent can be accumulated in the concave surface part recessed from the bottom face of a terminal box, and the penetration | invasion to the side of the opening part of an excessive adhesive agent can be prevented.

  According to a fourth characteristic configuration of the present invention, the terminal box includes a movable operation unit that can switch the terminal unit and the external terminal between a connected state and a non-connected state.

  If it is this structure, the situation where the operation of the said movable operation part by the excess adhesive agent adhering to a movable operation part and hardening | curing becomes difficult can be prevented.

  According to a fifth characteristic configuration of the present invention, the terminal portion can be connected to the external terminal by being pressed against the external terminal facing the opening in a posture along the fixed surface. It is in the point provided.

  With this configuration, it is possible to prevent poor electrical connection between the terminal portion and the external terminal due to the excess adhesive adhering to the external terminal facing the opening in a posture along the fixed surface. it can.

It is a top view which shows the inside of a terminal box. It is a disassembled perspective view which shows the inside of a terminal box. It is a disassembled perspective view of a terminal assembly. It is a disassembled perspective view of a terminal assembly. (A) is the top view which shows the outer bottom face of the baseplate of a box main body, (b) is the perspective view which looked at the baseplate of the box main body from the side of the outer bottom face. It is sectional drawing which shows a terminal box fixation structure, (a) shows the terminal box before fixation, (b) shows the terminal box after fixation, (c) shows the terminal part of the terminal box after fixation as an external terminal. Shows the connected state. The terminal box fixing structure of 2nd Embodiment is shown, (a) is a top view which shows the outer bottom face of the bottom board of a box main body, (b) is the perspective view which looked at the bottom board of the box main body from the side of the outer bottom face. It is sectional drawing which shows the terminal box fixing structure of 3rd Embodiment, (a) shows the terminal box before fixation, (b) shows the terminal box after fixation. It is sectional drawing which shows the terminal box fixing structure of 4th Embodiment. It is a top view which shows the outer bottom face of the baseplate of the box main body in the terminal box fixing structure of 4th Embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
1 to 6 show, for example, a resin-based adhesive such as an epoxy resin system or a silicone resin system on a fixed surface A constituted by the back surface of a solar cell module (not shown) by the terminal box fixing structure according to the present invention. The terminal box B for solar cell modules fixed with the agent C is shown.

The terminal box B includes a resin box main body 1 and a resin lid 2 that closes the upper opening 1a of the box main body 1. The box main body 1 is integrally formed with a cable support 1b.
The box body 1 integrally includes a bottom plate 3 having an outer bottom surface 3a that is bonded and fixed to the fixed surface A with an adhesive C. The bottom plate 3 has a plurality of openings 4 for connecting external terminals. Yes.

External terminals 5 of the solar cell module are extended to the back surface (fixed surface) A side, and terminal portions 6 of terminal plates that are electrically connected to the external terminals 5 are housed in the box body 1.
An output cable D connected to a storage battery or the like is inserted into the cable support portion 1 b and introduced into the box body 1, and is electrically connected to the terminal portion 6.

The box body 1 has a movable operation unit F that can be switched between a connected state and a non-connected state in which the external terminal 5 and the terminal unit 6 introduced through each opening 4 are electrically connected.
The movable operation part F includes a holding part 7 having a pressing part 7a for pressing and electrically connecting the external terminal 5 to the terminal part 6, and a wedge for sliding the holding part 7 in a direction along the plate surface of the bottom plate 3. The member 8 is provided as a movable operation member.

In the box body 1, a plurality of terminal assemblies T each including the terminal portion 6, the holding portion 7, and the wedge member 8 are accommodated side by side.
Each terminal assembly T is accommodated corresponding to each opening 4.

Each terminal assembly T is attached to the box body 1 by fixing the terminal portion 6 to the box body 1.
Adjacent terminal assemblies T are electrically connected to each other via a bypass diode E, and an output cable D is electrically connected to the terminal assemblies T located at both ends.

Each of the terminal assemblies T is similarly configured, and one of them will be described.
The holding part 7 is made of sheet metal, and as shown in FIGS. 2 and 3, two long-side peripheral walls h <b> 2 that face each other, and two short-side peripheral walls that face each other at both longitudinal ends of the long-side peripheral wall part h <b> 2. The cylinder end part provided with the parts h1 and h3 is formed in the rectangular cylinder shape opened to a rectangle.
The holding portion 7 is assembled to the terminal portion 6 so as to be slidable in the longitudinal direction of the long side peripheral wall portion h2 in a posture in which the wall surfaces of the peripheral wall portions h1 to h3 are along the depth direction of the box body 1.

One short side peripheral wall portion h1 is provided with a pressing portion 7a that is bent in a state of being folded back to the inside of the cylinder.
The pressing part 7a is extended so that it can elastically swing in the longitudinal direction of the long side peripheral wall part h2 (sliding movement direction of the holding part 7) with the bent part as a fulcrum.
The other short side peripheral wall portion h3 is provided with a pair of inclined plate portions 7b inclined toward the outer side of the cylinder, and these inclined plate portions 7b contact the inclined wedge surface 8a of the wedge member 8 with the surface contact state. Take it.

Each long side peripheral wall part h2 is provided with a long long hole 7c along the longitudinal direction of the long side peripheral wall part h2.
A fitting convex portion 6a provided in the terminal portion 6 is fitted into the long hole 7c, and the holding portion 7 is assembled to the terminal portion 6 so as to be slidable along the longitudinal direction of the long hole 7c.

  The terminal portion 6 is made of sheet metal, and as shown in FIGS. 2 to 4, a pair of support wall portions w <b> 1 slidably contactable with each of the pair of long side peripheral wall portions h <b> 2 of the holding portion 7, and both support wall portions w <b> 1. And a connecting wall portion w2 for connecting the one side portions to each other.

The support wall portion w1 is formed with a fitting convex portion 6a that is fitted into the long hole 7c of the holding portion 7 from the outer periphery side of the holding portion.
An output contact portion w3 having a U-shaped cross section for connecting the output cable D and the bypass diode E is provided on the other side of the support wall portion w1.
The output contact portion w3 is provided with a holding body 9 that holds the output cable D and the bypass diode E between the output contact portion w3 and electrically connects to the output contact portion w3.

The connection wall portion w2 is provided with a connection plate portion w4 that enters between the pair of support wall portions w1 and an opening 10 into which the wedge member 8 enters.
The holding part 7 is assembled to the terminal part 6 so that the connecting plate part w4 enters between the pair of long side peripheral wall parts h2, and the external terminal 5 is pressed by the pressing part 7a so as to contact the connecting plate part w4. The external terminal 5 and the terminal portion 6 are electrically connected.

The wedge member 8 is made of synthetic resin, and as shown in FIGS. 2 and 3, an inclined wedge surface 8 a slidably contacting the inclined plate portion 7 b of the holding portion 7 and a rail integrally formed on the bottom plate 3. A rail groove 8b into which the portion 3b is inserted is formed.
The wedge member 8 is assembled so as to be slidable in the depth direction of the box body 1 along the rail portion 3b.

As shown in FIG. 5, an application region G to which an adhesive is applied is set on the outer bottom surface 3 a of the bottom plate 3.
The application region G is set in a series of substantially rectangular shapes along the outer peripheral edge of the outer bottom surface 3a.

A step portion 11 corresponding to each opening 4 is integrally formed at a position between the application region G and the peripheral edge 4b of the opening 4 in a plan view of the outer bottom surface 3a.
Each step portion 11 is formed by providing a convex surface portion protruding from the outer bottom surface 3 a on the outer bottom surface 3 a in a substantially U shape along the peripheral edge 4 b of the rectangular opening 4.

A procedure for connecting the external terminal 5 to the terminal portion 6 will be described.
As shown in FIG. 6A, uncured adhesive C is applied to the application region G in a state where the distance between the pressing portion 7a and the connecting plate portion w4 is wide (the wedge member 8 is not pushed in). Keep it.

Next, as shown in FIG. 6B, the outer bottom surface 3 a is bonded to the fixed surface A so that the external terminal 5 enters between the pressing portion 7 a and the connecting plate portion w 4 through the opening 4.
At this time, the flow of the excess adhesive C can be blocked by the convex surface portion (stepped portion) 11 to prevent the adhesive C from entering the opening 4 side.

  Next, as shown in FIG. 6C, by pushing the wedge member 8 so that the rail portion 3b fits into the rail groove 8b, the pressing portion 7a comes into contact with the inclined wedge surface 8a and the inclined plate portion 7b. The holding part 7 slides so as to press the external terminal 5 toward the connection plate part w4, the external terminal 5 is sandwiched between the pressing part 7a and the connection plate part w4, and the external terminal 5 and the terminal part 6 are inserted. (Connecting plate portion w4) is electrically connected through opening 4.

  Accordingly, the terminal portion 6 and the external terminal 5 are electrically connected by the sliding movement of the holding portion 7 accompanying the pushing and pulling operation of the wedge member 8 and the external terminal 5 is separated from the terminal portion 6. And can be switched.

[Second Embodiment]
FIG. 7 shows another embodiment of the present invention.
In the present embodiment, a step that surrounds the plurality of openings 4 in a group by providing a series of convex portions along a portion between the application region G and the peripheral edges 4b of the plurality of openings 4 in a plan view of the outer bottom surface 3a. The part 11 is integrally formed.
Other configurations are the same as those of the first embodiment.

[Third Embodiment]
FIG. 8 shows another embodiment of the present invention.
In the present embodiment, although not shown in the drawings, in place of the step portion 11 formed by the convex portion shown in the second embodiment, a stepped portion is provided on the outer bottom surface 3a so as to be recessed from the outer bottom surface 3a. 11 is formed.
Other configurations are the same as those of the second embodiment.

  According to the present embodiment, uncured adhesive C is applied to the application region G as shown in FIG. 8A, and the outer bottom surface 3a is applied to the fixed surface A as shown in FIG. 8B. When combined, excess adhesive C can be accumulated in the concave surface portion (stepped portion) 11 to prevent the adhesive C from entering the opening 4 side.

[Fourth Embodiment]
9 and 10 show another embodiment of the present invention.
In the present embodiment, after the terminal box B is pressed against the external terminal 5 facing the opening 4 in a posture along the fixed surface A, the metal terminal portion 6 housed in the box body 1 is pressed. It is provided so that it can be electrically connected to the external terminal 5 by soldering or welding.

  That is, the connecting portions 12 of the plurality of terminal portions 6 to the respective external terminals 5 are connected to the terminal portion main body 13 via the elastic bent portions 14 and are located outward from the outer bottom surface 3 a through the common opening 4. Is protruding.

  Then, as shown in FIG. 9, the outer bottom surface 3 a is pressed against the fixed surface A side while elastically deforming the elastic bending portion 14, so that the connection portion 12 is connected to the external terminal 5 by the elastic restoring force of the elastic bending portion 14. On the other hand, it is configured so that it can be kept electrically connected to the external terminal 5 by soldering or welding after the press contact.

An application region G to which an adhesive is applied is set on the outer bottom surface 3 a of the bottom plate 3.
And the level | step-difference part 11 is integrally formed in the location between the application | coating area | region G and the peripheral edge 4b of the opening part 4 by planar view of the outer side bottom face 3a.
In the present embodiment, the step portion 11 is formed along the boundary portion of the application region G.
The step portion 11 is formed in a series of annular shapes on the outer bottom surface 3 a by arranging a convex surface portion protruding from the outer bottom surface 3 a in a rectangle surrounding the peripheral edge 4 b of the opening 4.

[Fifth Embodiment]
Although not shown, in the first and fourth embodiments, instead of the step portion 11 formed by the convex surface portion, a concave surface portion similar to that of the third embodiment that is recessed into the outer bottom surface 3a than the outer bottom surface 3a is provided. The step part 11 may be formed by providing.

[Other Embodiments]
1. In the terminal box fixing structure according to the present invention, the stepped portion 11 may be formed at a location between the application region G and the peripheral edge 4 b of the opening 4 in a plan view on the fixed surface A.
2. In the terminal box fixing structure according to the present invention, the step portion 11 may be formed at a location between the application region G and the peripheral edge 4b of the opening 4 in plan view on both the fixed surface A and the outer bottom surface 3a. Good.
3. In the terminal box fixing structure according to the present invention, the stepped portion 11 constituted by a convex surface portion or a concave surface portion may be intermittently formed along a portion between the application region G and the peripheral edge 4b of the opening 4. .

3 Bottom plate 3a Bottom surface 4 Opening portion 4b Perimeter 5 External terminal 6 Terminal portion 11 Step portion (convex surface portion, concave surface portion)
A Fixed surface B Terminal box C Adhesive F Movable operation part G Application area

Claims (5)

The terminal box has a bottom plate having a bottom surface fixed to the fixed surface with an adhesive, an opening for connecting an external terminal formed on the bottom plate, and a terminal portion to which the external terminal is electrically connected. And
The external terminal and the terminal portion are connected through the opening,
A terminal box fixing structure in which a step portion is formed at a position between an application region where the adhesive is applied on at least one of the fixed surface and the bottom surface and a peripheral edge of the opening.   The terminal box fixing structure according to claim 1, wherein the stepped portion is formed by providing a convex surface portion protruding from the bottom surface on the bottom surface.   The terminal box fixing structure according to claim 1, wherein the stepped portion is formed by providing a concave surface portion that is recessed from the bottom surface.   The terminal box fixing structure according to any one of claims 1 to 3, wherein the terminal box has a movable operation portion that can switch the terminal portion and the external terminal between a connected state and a non-connected state.   The said terminal part is provided so that it can connect with respect to the said external terminal by making it press-contact with the external terminal which faces the said opening part in the attitude | position along the said to-be-fixed surface. The terminal box fixing structure according to claim 1.

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