JP2018010797A - Terminal board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a nut from dropping to the bottom wall side, by preventing a nut housed in a nut housing section from dropping from the nut insertion port.SOLUTION: In a terminal board 10 including a bus bar 30, a resin 20 having a bottom wall 25 placed oppositely to the bus bar 30, and a nut 40 housed in a nut housing section 11 provided between the bus bar 30 and bottom wall 25, a nut insertion port 12 for inserting the nut 40 toward the nut housing section 11 is provided between the end of the bus bar 30 and the end of the bottom wall 25. The height H3 of the nut 40 is larger than the height H1 from the bottom wall 25 to the bus bar 30 in the nut insertion port 12, and smaller than the height H2 from the bottom wall 25 to the bus bar 30 in the nut housing section 11.SELECTED DRAWING: Figure 4

Description

  The technique disclosed by this specification is related with a terminal block.

  Conventionally, as a terminal block provided with a nut press-fitting portion into which a nut is press-fitted, for example, a terminal block described in Japanese Patent Laid-Open No. 2015-26517 (Patent Document 1 below) is known. The nut press-fit holding structure includes a housing and a nut that is press-fitted into the nut press-fit portion of the housing, and the nut press-fit portion is provided with a curved stress relief portion so that the corner portion of the nut does not contact. Yes. Moreover, a pair of convex part is provided in the side wall of the nut press-fit part. When the nut is press-fitted into the nut press-fitting portion, the pair of convex portions are crushed by the nut, so that the nut is press-fitted and held.

JP 2015-26517 A

  However, in the above terminal block, although the resin can be prevented from being damaged by the stress relief portion, when the bolt is fastened to the nut, the convex portion may be further crushed by the rotation of the nut together with the bolt. Yes, by repeatedly detaching the bolt, the convex portion may fall and the holding power of the nut may be reduced, and the nut may fall off.

  The terminal block disclosed in the present specification was accommodated in a bus bar, a resin portion having a bottom wall arranged to face the bus bar, and a nut accommodating portion provided between the bus bar and the bottom wall. A terminal block provided with a nut, between the end of the bus bar and the end of the bottom wall is provided with a nut insertion port for inserting the nut toward the nut accommodating portion; The height dimension of the nut is larger than the height dimension from the bottom wall to the bus bar in the nut insertion port, and smaller than the height dimension from the bottom wall to the bus bar in the nut housing portion. It was.

  According to such a configuration, the nut is inserted into the nut insertion opening in a press-fit manner, and is held by the pair of resin ribs in the nut housing portion. Here, since the height dimension of the nut is larger than the height dimension from the bottom wall to the bus bar at the nut insertion port, there is no possibility that the nut accommodated in the nut accommodating portion will fall off from the nut insertion port. Further, since the nut is located between the bottom wall and the bus bar, the nut does not fall off to the bottom wall side.

The terminal block disclosed by this specification is good also as the following structures.
The nut accommodating portion is provided on the bus bar and accommodates a bus bar side nut accommodating portion that accommodates a part of the nut, and a resin that accommodates a portion of the nut that protrudes from the bus bar side nut accommodating portion. It is good also as a structure which consists of a part side nut accommodating part.
According to such a structure, a nut will be accommodated in both a bus-bar side nut accommodating part and a resin part side nut accommodating part. Even when the nut is going to be rotated together with the bolt when the bolt is fastened to the nut, the nut can be prevented from rotating by contacting the inner wall of the bus bar side nut accommodating portion.

A pair of resin rib side facing surfaces facing the both side surfaces of the nut in the nut housing portion are provided with a pair of resin ribs that press both side surfaces of the nut, and both side surfaces of the nut in the bus bar The separation distance between the pair of opposing bus bar side facing surfaces may be substantially the same as the dimension between both side surfaces of the nut.
According to such a structure, rotation of a nut is prevented because both side surfaces of a nut contact | abut to a pair of bus-bar side opposing surface, respectively. Therefore, the amount by which the pair of resin ribs are scraped by both side surfaces of the nut can be reduced as compared with the case where the bus bar side nut housing portion is not provided. Thereby, it can suppress that the resin rib falls and the holding | maintenance force of a nut falls by detaching | removing a volt | bolt repeatedly, and it can prevent a nut falling.

  According to the terminal block disclosed by this specification, it can prevent that the nut accommodated in the nut accommodating part falls off from a nut insertion port, and can prevent that a nut falls to the bottom wall side.

Top view of the terminal block before inserting the nut Front view of terminal block before inserting nut AA line sectional view in FIG. Sectional view of the terminal block at the cutting position of FIG. BB sectional view in FIG. Sectional drawing of the terminal block in the cutting position of FIG.

<Embodiment>
The embodiment will be described with reference to the drawings of FIGS. As shown in FIG. 4, the terminal block 10 in the embodiment includes a resin portion 20 made of synthetic resin, a bus bar 30 made of conductive metal, and a nut 40 made of conductive metal. . Further, the terminal block 10 has a nut housing portion 11 in which a nut 40 is housed, and a nut insertion port 12 is provided at the front end portion of the nut housing portion 11 so as to open forward. The nut 40 is accommodated in the nut accommodating portion 11 from the nut insertion port 12.

  The bus bar 30 has a flat plate shape and has bolt insertion holes 31 through which bolts (not shown) are inserted. On the other hand, the nut 40 is a square nut having a substantially square shape in plan view, and has a bolt fastening hole 41 to which a bolt (not shown) is fastened. The bolt insertion hole 31 of the bus bar 30 and the bolt fastening hole 41 of the nut 40 are arranged so as to be coaxial. Therefore, the bolt can be inserted into the bolt insertion hole 31 and fastened to the bolt fastening hole 41.

  The resin portion 20 has a bus bar insertion hole 21 through which the bus bar 30 is inserted, and the bus bar 30 is held in a form protruding forward from the bus bar insertion hole 21. A bottom wall 25 is provided below the bus bar 30 in the resin portion 20. The bottom wall 25 is disposed to face the bus bar 30. The bottom wall 25 is provided with an escape hole 26 for allowing the shaft portion of the bolt to escape. As shown in FIG. 3, the escape hole 26 is provided through the bottom wall 25 in the plate thickness direction at a position that is coaxial with the bolt insertion hole 31.

  The nut accommodating portion 11 is provided between a portion of the bus bar 30 protruding forward from the bus bar insertion hole 21 and the bottom wall 25. The nut housing portion 11 includes a bus bar side nut housing portion 32 and a resin portion side nut housing portion 22. The bus bar side nut accommodating portion 32 is provided by recessing a part of the lower surface of the bus bar 30 upward, and accommodates the upper end portion of the nut 40. On the other hand, the resin part side nut accommodating part 22 accommodates a portion of the nut 40 that protrudes downward from the bus bar side nut accommodating part 32.

  As shown in FIG. 3, the bus bar side nut accommodating portion 32 is provided behind the front end portion of the bus bar 30 and opens downward at the peripheral edge portion of the bolt insertion hole 31.

  As shown in FIG. 6, the resin part side nut housing part 22 is provided with a pair of resin part side facing surfaces 23 facing both side surfaces 42 of the nut 40. A pair of resin ribs 24 are provided on each resin portion side facing surface 23 side by side in the vertical direction. As shown in FIG. 3, the resin rib 24 is configured to extend in the front-rear direction. The front end of each resin rib 24 is positioned slightly forward of the front end of the bolt insertion hole 31 and is positioned rearward of the front end of the bus bar 30. For this reason, when the nut 40 is press-fitted into the nut housing portion 11, the nut 40 receives the pressing force of the resin rib 24 and is held in the nut housing portion 11.

  Now, in the terminal block 10 of this embodiment, it is comprised so that the nut 40 accommodated in the nut accommodating part 11 can prevent falling from the nut insertion port 12. FIG. Specifically, as shown in FIG. 4, the height dimension H <b> 3 of the nut 40 is larger than the height dimension H <b> 1 from the bottom wall 25 to the bus bar 30 in the nut insertion port 12, and the bottom in the nut housing portion 11. The height from the wall 25 to the bus bar 30 is smaller than H2.

  If the height dimension H1 is made smaller than the height dimension H3, the nut 40 becomes a press fit when the nut 40 is inserted into the nut accommodating portion 11 from the nut insertion port 12, and the insertion force is slightly increased. 11, the nut 40 cannot pass through the nut insertion opening 12. For example, even if the resin rib 24 is sunk and the holding force of the nut 40 is reduced, the nut 40 can be prevented from dropping from the nut insertion port 12. In addition, since the bottom wall 25 is provided below the nut 40, the nut 40 does not fall downward (bottom wall 25 side).

  Moreover, in the terminal block 10 of this embodiment, when the volt | bolt is fastened, it is comprised so that the resin rib 24 can be prevented from falling by the nut 40 rotating. Specifically, as shown in FIG. 6, the separation distance W <b> 3 between the pair of bus bar side facing surfaces 33 facing the both side surfaces 42 of the nut 40 in the bus bar 30 is the spacing distance between the pair of resin portion side facing surfaces 23. It is smaller than W1 and slightly larger than the dimension W2 between both side surfaces 42 of the nut 40.

  When the separation distance W3 is smaller than the separation distance W1, the nut 40 comes into contact with the bus bar facing surface 33 before the resin portion facing surface 23 when the nut 40 is rotated. The amount of scraping of the resin rib 24 can be reduced as compared with the case where the resin rib 24 abuts against the side facing surface 23. Further, when the separation distance W3 is made larger than the dimension W2 and the height dimension H2 is made larger than the height dimension H3, the upper end portion of the nut 40 can be accommodated in the bus bar side nut accommodating portion 32, and Stopping can be performed reliably.

  As described above, in this embodiment, the nut 40 is inserted into the nut insertion port 12 in a press-fit manner, and is held by the pair of resin ribs 24 in the nut housing portion 11. Here, since the height dimension H3 of the nut 40 is larger than the height dimension H1 from the bottom wall 25 to the bus bar 30 at the nut insertion port 12, the nut 40 accommodated in the nut accommodating portion 11 is removed from the nut insertion port 12. There is no risk of falling off. Moreover, since the nut 40 is located between the bottom wall 25 and the bus bar 30, there is no possibility that the nut 40 falls off to the bottom wall 25 side.

The nut accommodating portion 11 is provided on the bus bar 30 and accommodates a bus bar side nut accommodating portion 32 that accommodates a part of the nut 40 and a portion of the nut 40 that is provided on the resin portion 20 and protrudes from the bus bar side nut accommodating portion 32. It is good also as a structure which consists of the resin part side nut accommodating part 22. FIG.
According to such a configuration, the nut 40 is accommodated in both the bus bar side nut accommodating portion 32 and the resin portion side nut accommodating portion 22. Even when the nut 40 is to be rotated together with the bolt when the bolt is fastened to the nut 40, the nut 40 can be prevented from being rotated due to the nut 40 coming into contact with the inner wall of the bus bar side nut housing portion 32.

A pair of resin ribs 24 that press both side surfaces 42 of the nut 40 are provided on the pair of resin portion side facing surfaces 23 facing the both side surfaces 42 of the nut 40 in the nut accommodating portion 11, and the nut 40 in the bus bar 30. The spacing distance between the pair of bus bar side facing surfaces 33 facing the both side surfaces of the nut 40 may be substantially the same as the dimension between the side surfaces 42 of the nut 40.
According to such a configuration, the rotation of the nut 40 is prevented by the both side surfaces 42 of the nut 40 coming into contact with the pair of bus bar side facing surfaces 33. Therefore, the amount by which the pair of resin ribs 24 are scraped by the both side surfaces 42 of the nut 40 can be reduced as compared with the case where the bus bar side nut accommodating portion 32 is not provided. Thereby, it can suppress that the resin rib 24 falls and the holding force of the nut 40 falls by detaching | removing a volt | bolt repeatedly, and omission of the nut 40 can be prevented.

<Other embodiments>
The technology disclosed in the present specification is not limited to the embodiments described with reference to the above description and drawings, and includes, for example, the following various aspects.
(1) Although the bus bar side nut accommodating portion 32 is provided in the bus bar 30 in the above embodiment, the bus bar side nut accommodating portion may not be provided. In that case, a nut housing recess for housing the lower end portion of the nut 40 may be provided in the bottom wall 25 of the resin portion 20.

  (2) Although the separation distance W3 between the pair of bus bar facing surfaces 33 is slightly larger than the dimension W2 between the both side surfaces 42 of the nut 40 in the above embodiment, the upper end of the nut 40 is opposed to the pair of bus bars. As long as it is accommodated between the surfaces 33, the separation distance W3 may be further reduced.

  (3) Although the pair of resin ribs 24 extend in the front-rear direction on the back side of the nut insertion port 12 in the above embodiment, a pair of resin ribs are provided from the nut insertion port 12 toward the back side. Alternatively, a configuration in which no resin rib is provided may be employed.

DESCRIPTION OF SYMBOLS 10 ... Terminal block 11 ... Nut accommodating part 12 ... Nut insertion slot 20 ... Resin part 22 ... Resin part side nut accommodating part 23 ... Resin part side opposing surface 24 ... Resin rib 25 ... Bottom wall 30 ... Bus bar 32 ... Bus bar side nut accommodation Part 33 ... Busbar side facing surface 40 ... Nut 42 ... Side

Claims (3)

A bus bar,
A resin part having a bottom wall arranged to face the bus bar;
A terminal block comprising a nut housed in a nut housing portion provided between the bus bar and the bottom wall,
Between the end portion of the bus bar and the end portion of the bottom wall, a nut insertion port for inserting the nut toward the nut accommodating portion is provided,
The height dimension of the nut is larger than the height dimension from the bottom wall to the bus bar in the nut insertion port, and is smaller than the height dimension from the bottom wall to the bus bar in the nut housing portion. Stand.   The nut accommodating portion is provided on the bus bar and accommodates a bus bar side nut accommodating portion that accommodates a part of the nut, and a resin that accommodates a portion of the nut that protrudes from the bus bar side nut accommodating portion. The terminal block according to claim 1, comprising a part-side nut housing part. A pair of resin portion side facing surfaces facing the both side surfaces of the nut in the nut housing portion are provided with a pair of resin ribs that press both side surfaces of the nut,
3. The terminal block according to claim 2, wherein a distance between a pair of bus bar side facing surfaces facing the both side surfaces of the nut in the bus bar is substantially the same as a dimension between both side surfaces of the nut.

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