JP2012243700A - Connection structure of planar terminal and connected part, and electrical connection box - Google Patents

Abstract

[PROBLEMS] To improve the workability and maintainability, and to reduce the size, save space, and reduce the number of parts, and the connection structure and electrical connection between a plate-like terminal and a connection partner Provide a box.
When a terminal fitting 7 is set on an FL bolt block 8 and then a nut 48 is screwed in, electrical connection of the terminal fitting 7 is completed. At the same time, the electrical connection between the upper plate-like terminal 74 of the main fusible link 23 and the first connection partner 42 of the bus bar 25 is also completed. At the same time, the electrical connection between the lower plate-like terminal 75 of the main fusible link 23 and the second connection partner 43 of the bus bar 26 is also completed.
[Selection] Figure 2

Description

  The present invention relates to a connection structure between a plate-like terminal and a connection partner. The present invention also relates to an electrical junction box employing this structure.

  As an electric device mounted on a vehicle such as an automobile, for example, an electric junction box can be cited. The electric junction box is known as a generic term for a relay box, a fuse box, a junction block, an electronic control unit box, or the like.

  Patent Document 1 listed below discloses a technique related to an electrical junction box. The electrical junction box includes an electrical junction box body, an upper cover that fits to the upper end of the housing of the electrical junction box body, a lower cover that fits to the lower end of the housing, and a side cover that fits to the side of the housing. Has been. The electric junction box is fixed at a predetermined position of the vehicle via a plurality of fixing legs provided on the housing of the electric junction box main body.

  The electrical junction box body includes a plurality of cassette blocks in addition to the housing. The plurality of cassette blocks are block-shaped members that fit inside the housing, and are provided for relays, fusible links, and fuses. When a relay or fusible link is attached, a cassette block assembly is formed.

  Taking a fusible link cassette block as an example, this cassette block has an insulating block housing. In the block housing, conductive bus bars, nuts and the like are provided. The block housing has a plurality of cavities, and a fusible link is inserted into the cavities.

  When the fusible link is inserted, each of the pair of plate-like terminals of the fusible link is opposed to the nut. When a bolt tightening (screw tightening, screwing) operation is performed in a state where the plate-like terminal is disposed opposite to the nut, the plate-like terminal is electrically connected to the bus bar or the like.

  The electrical connection box main body is provided with a terminal mounting portion connected to the bus bar. The terminal mounting portion includes a conductive terminal contact plate, a stud bolt standing on the terminal contact plate, and a nut screwed into the stud bolt. The terminal attachment portion is provided as a portion for electrically connecting a terminal fitting provided on the electric wire terminal. The terminal mounting portion is disposed so as to be located on the side portion of the electrical junction box main body. The terminal fitting connected and fixed to the terminal mounting portion is covered with a side cover that fits into the housing side portion of the electrical connection box body.

  Here, the assembly (an example) of the electrical junction box will be described based on the above configuration and structure.

  The electrical junction box is first assembled from the electrical junction box body. As a specific work procedure (as an example), first, the work of mounting the fusible link to the corresponding cassette block is performed. In the installation of the fusible link, as described above, the fusible link insertion work and the bolt tightening work are included. Since the fusible link has a pair of plate-like terminals, a bolting operation with a bolt is performed twice on one fusible link. Moreover, the operation | work which connects a wire harness from the downward direction of a cassette block is performed. After mounting the fusible link or wire harness to the corresponding cassette block, the work of fitting the cassette block into the housing is performed next.

  After assembling the electrical junction box main body, an operation of connecting the terminal fitting of the electric wire terminal to the terminal mounting portion and an operation of fitting the side cover to the side of the housing so as to cover the terminal fitting are performed. Furthermore, an operation of fitting the upper cover to the upper end of the housing, an operation of fitting the lower cover to the lower end of the housing, and the like are performed (the operation sequence here is an example).

  The assembly of the electrical junction box is completed through the above operations. The electrical connection box in a state where the assembly is completed is fixed to a predetermined position of the vehicle by bolting.

JP 2007-282399 A

  In the conventional electrical junction box, for example, when performing maintenance on the fusible link, first, the electrical junction box fixed at a predetermined position of the vehicle is removed, and then various covers and terminal fittings of the wire terminals are removed from the electrical junction box. A series of operations are required to remove, then remove the cassette block from the housing of the electrical junction box body, and finally remove the fusible link from the cassette block. Accordingly, the number of man-hours required for these removal operations is large, and there are problems that workability is poor and maintenance is poor.

  The removal operation includes an operation of releasing the tightening of the bolt and the nut. That is, a tightening release operation is included in one of the terminal attachment portion and the fusible link and the other plate-like terminal portion. Since the tightening release operation is performed at three places in the above case, there is a problem that workability and maintainability are poor in this respect as well. In addition, the tightening release operation has a problem that workability and maintainability are poor in this respect because the terminal attachment portion and the fusible link portion are separated in the above case.

  Of course, in addition to the above-described tightening release operation, the workability of the bolts and nuts also deteriorates in the tightening operation when assembling the electrical junction box.

  Although not limited to the electrical junction box, in recent automobile parts, demands such as downsizing, space saving, and reduction in the number of parts are increasing.

  The present invention has been made in view of the circumstances described above, and can improve workability and maintainability, and can be reduced in size, space, and the number of components. It is an object to provide a connection structure between a terminal and a connection partner, and an electrical connection box.

  The connection structure between the plate-like terminal of the present invention and the connection partner according to claim 1, which has been made in order to solve the above-described problems, includes a conductive plate-like terminal and a conductive plate-like terminal opposite to each other having a bolt insertion portion. A conductive first connection partner having a bolt insertion part and the one plate-like terminal, and a conductive second connection partner having a bolt insertion part and the other plate-like terminal. In performing the collective connection using a collective tightening bolt that has an insulating portion and inserted into each bolt insertion portion and a nut that is screwed into the collective tightening bolt, The screw connection between the fastening bolt and the nut is released to release the collective connection.

  The connection structure between the plate-like terminal and the connection partner according to the second aspect of the present invention relates to the connection structure between the plate-like terminal and the connection partner according to the first aspect, and is a conductive third connection having a bolt insertion portion. And an insulating block portion provided at the connection position of the third connection partner, and the collective tightening bolt is engaged with the block portion, and the collective tightening bolt and the nut are screwed in to A collective connection including the third connection partner or a collective connection release including the third connection partner is performed by releasing the screwing.

  According to a third aspect of the present invention, there is provided a connection structure between a plate-like terminal and a connection partner according to the present invention. It is characterized by forming.

  The connection structure between the plate-like terminal and the connection partner of the present invention according to claim 4 relates to the connection structure between the plate-like terminal and the connection partner according to any one of claims 1 to 3, and the one plate-like terminal. And the other plate-like terminal are connected by a conductive fusible portion, and the one plate-like terminal or the other plate-like terminal is arranged in the insulating portion of the collective fastening bolt, To do.

  According to the connection structure of the present invention having the above-described features, by adopting this structure, two or three places can be electrically fastened (connected) by one screw tightening. Become. In addition, it is possible to perform electrical fastening release (connection release) at two places or three places with one screw release. The present invention has a structure that does not require two or three batch fastening bolts and nuts even if a pair of plate-like terminals are provided.

  The present invention has a structure in which one and the other plate-shaped terminals facing each other and the first and second connection partners can be collectively connected using a collective tightening bolt and nut. In addition, the present invention also has a structure that can be released from the connected state all at once. Since the collective fastening bolt according to the present invention is a bolt having an insulating portion, it has a structure in which conduction between one and the other plate terminals via the collective fastening bolt can be avoided. In addition, according to the present invention, it is possible to perform a collective connection and a collective connection release including the third connection partner without increasing the number of collective fastening bolts and nuts. Since this invention collects each part in the connection position of a 3rd connection other party, it also becomes a structure which can achieve size reduction and space saving.

  An electrical junction box according to the present invention according to claim 5, which has been made to solve the above-mentioned problems, employs the connection structure between the plate-like terminal according to any one of claims 1 to 4 and a connection partner. It is characterized by that.

  According to the present invention having such a feature, since it is an electrical connection box adopting the connection structure between the plate-like terminal according to any one of claims 1 to 4 and a connection partner, a better electrical connection Can be boxed.

  According to the first aspect of the present invention, it is possible to improve workability and maintainability.

  According to the second aspect of the present invention, it is possible to further improve workability and maintainability. Moreover, according to this invention, there exists an effect that size reduction, space saving, and reduction of a number of parts can also be aimed at.

  According to the third aspect of the present invention, there is an effect that the block portion can be detachably attached to the predetermined member. Therefore, it is possible to improve workability and maintainability.

  According to the fourth aspect of the present invention, it is possible to provide a connection structure relating to a fuse.

  According to the present invention described in claim 5, it is possible to provide an electrical junction box with good workability and maintainability, and an electrical junction box with reduced size, space saving, and reduced number of parts. There is an effect.

It is a disassembled perspective view of the electrical-connection box which employ | adopts the connection structure of this invention (Example 1). It is a perspective view of the electrical connection box which shows the state which removed the side cover. It is a perspective view of the electrical connection box which shows the state which expanded the part of FL bolt block. It is a perspective view of the electrical junction box which shows the state which removed the FL bolt block. It is a perspective view of a cassette block assembly. It is a perspective view of the cassette block of FIG. It is a perspective view of FL bolt block. FIG. 8 is an exploded perspective view of the FL bolt block of FIG. 7. It is a perspective view which shows the state just before attaching an FL bolt block to a cassette block. It is a perspective view which shows the state which assembled | attached the FL bolt block to the cassette block. (Example 2) which is a perspective view which shows the modification of a FL bolt block. It is a disassembled perspective view of the FL bolt block of FIG. It is a perspective view of the cassette block assembly as a comparative example. It is a disassembled perspective view of the comparative example of FIG.

  The connection structure between the plate-like terminal and the connection partner according to the present invention is a structure in which electrical fastening or fastening release is performed at two places or three places by one screw fastening or screw fastening release. The electrical connection box of the present invention is an electrical connection box that employs a connection structure between the plate-like terminal and the connection partner.

  Embodiment 1 will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of an electrical junction box employing the connection structure of the present invention. 2 is a perspective view of the electrical junction box with the side cover removed, FIG. 3 is a perspective view of the electrical junction box showing an enlarged state of the FL bolt block, and FIG. 4 is a diagram with the FL bolt block removed. FIG. 5 is a perspective view of the cassette block assembly, FIG. 6 is a perspective view of the cassette block of FIG. 5, FIG. 7 is a perspective view of the FL bolt block, and FIG. 8 is the FL bolt of FIG. FIG. 9 is a perspective view showing a state immediately before the FL bolt block is assembled to the cassette block, and FIG. 10 is a perspective view showing a state where the FL bolt block is assembled to the cassette block.

  In the following description, specific shapes, materials, numerical values, directions, and the like are examples for facilitating the understanding of the present invention, and can be appropriately changed according to use, purpose, specifications, and the like. To do.

  The arrow P in FIGS. 1 and 2 indicates the up-down direction, the arrow Q indicates the left-right direction, and the arrow R indicates the front-rear direction.

  1 and 2, an electric connection box 1 as an electric device mounted on a vehicle (not shown) such as an automobile includes an electric connection box main body 2, an upper cover 3, a lower cover 4, and a side cover 5. It is prepared for. The electrical junction box 1 having such a configuration is connected to a terminal fitting 7 provided at the end of the electric wire 6, a wire harness (not shown), and the like.

  The electric wire 6 is connected to an alternator (not shown). The terminal fitting 7 is connected to a terminal mounting portion (described later) of the electrical junction box body 2. The terminal attachment portion is covered with the side cover 5 to protect the connection portion and the like. The terminal attaching portion is disposed at a position where it is easily exposed when the side cover 5 is removed.

  1 to 4, a detachable FL bolt block 8 is used as the terminal mounting portion. The FL bolt block 8 has a main fusible link function. The FL bolt block 8 is a characteristic part of the present invention. Since the FL bolt block 8 is disposed at a position covered by the side cover 5, it can be said that the FL bolt block 8 is disposed at a position where maintenance is easy.

  As will be understood from the following description, the FL bolt block 8 can be electrically fastened or unfastened at two or three places by one screw tightening or screw unscrewing. (In this embodiment, when only the main fusible link is viewed, it is electrical fastening or fastening release at two places, and when it is viewed including the connection of the terminal fitting 7, it is electrical fastening or fastening release at three places. ). The configuration and structure of the FL bolt block 8 will be described later.

  One end of the wire harness (not shown) is connected to the lower part of the electrical junction box body 2 with a connector or the like. And when it is pulled out from the lower cover 4, it is routed along a predetermined route. The other end of the wire harness (not shown) is connected to, for example, a junction block.

  The electrical junction box 1 is fixed at a predetermined position of the vehicle. In this embodiment, it is fixed by a suitable means at a predetermined position in the engine room.

  The electrical junction box body 2 includes a synthetic resin housing 9 having insulating properties, and a cassette block assembly 10 fitted inside the housing 9. In the cassette block assembly 10, the functional parts of the electrical junction box 1 are integrated. The cassette block assembly 10 includes an FL bolt block 8 and has a structure in which the FL bolt block 8 is positioned on the side of the electrical junction box body 2.

  The housing 9 is a resin molded product, and an opening portion at the upper end is formed as a fitting portion of the upper cover 3. A plurality of lock portions 11 are formed at the fitting portion at the upper end. Further, the housing 9 has a lower end opening portion formed as a fitting portion of the lower cover 4. A plurality of lock portions 12 are formed in the fitting portion at the lower end. Further, the housing 9 has an opening portion on one side portion formed as a fitting portion of the side cover 5. A plurality of lock portions 13 are formed in the fitting portion on the one side portion.

  The opening portion on the one side is formed into a shape that can face the FL bolt block 8 of the cassette block assembly 10 and a shape that allows the FL bolt block 8 to be attached and detached.

  In the opening on the one side, reference numeral 14 indicates a terminal guide. Reference numeral 15 indicates a bridge portion. The terminal guide portion 14 is formed so that the terminal fitting 7 can be guided when connecting to the FL bolt block 8 and the arrangement of the terminal fitting 7 can be regulated. The bridge portion 15 is formed in a shape that crosses the opening.

  A fitting portion 16 for the cassette block assembly 10 is formed inside the housing 9. The fitting portion 16 fits the cassette block assembly 10 inside the housing 9 so that the cassette block assembly 10 can be inserted from the opening portion at the lower end of the housing 9 toward the fitting portion at the upper end. It is formed so that it can be. The fitting portion 16 is formed to have a space that matches the size of the cassette block assembly 10. A plurality of lock portions 17 are formed in the fitting portion 16.

  Reference numeral 18 denotes a fitting portion for another cassette block assembly (not shown).

  In FIG. 5, the cassette block assembly 10 includes a cassette block 19, fusible links 20, 21, and 22 that are mounted at predetermined positions of the cassette block 19, and fuses that are also mounted at predetermined positions of the cassette block 19 (illustrated). (Not shown), a relay (not shown), and the FL bolt block 8 described above. As described above, the FL bolt block 8 has a main fusible link function. Specifically, the main fusible link 23 is integrally provided.

  5 and 6, the cassette block 19 includes an insulating block housing 24 and conductive bus bars 25 and 26 (see FIG. 6) assembled to the block housing 24.

  The block housing 24 is a resin molded product, and in the present embodiment, is formed in a shape elongated in the direction of arrow R (see FIG. 1) (the shape is an example). A number of cavities are formed in the block housing 24. Reference numerals 27, 28, and 29 indicate cavities for the fusible links 20, 21, and 22. Reference numerals 30 and 31 denote fuse and relay cavities (not shown). The cavities 27 to 31 are formed in a shape according to the specifications of the fusible link 20 or the like.

  The block housing 24 has a plurality of connector housings 32 as connecting portions of a wire harness (not shown) on the lower side. Further, the block housing 24 has a plurality of lock portions 33 on this side portion. The lock portion 33 is formed as a portion that fits into the lock portion 17 of the fitting portion 16 (see FIG. 1) provided inside the housing 9.

  The block housing 24 has an FL bolt block attaching / detaching portion 34 at one end in the direction of arrow R (see FIG. 1). In other words, the FL bolt block attaching / detaching portion 34 is provided in accordance with the opening portion (side portion position of the electric junction box body 2) on one side portion of the housing 9. The FL bolt block attaching / detaching portion 34 corresponds to a portion for making the FL bolt block 8 freely attachable / detachable along the arrow R direction (see FIGS. 3 and 4) and corresponds to the connection position of the terminal fitting 7 of the terminal of the electric wire 6. It is formed as a part to do.

  In FIG. 6, the FL bolt block attaching / detaching portion 34 is formed in a substantially casing shape that accommodates the FL bolt block 8. Specifically, it is formed in a shape having an upper wall 35, left and right side walls 36, and a front wall 37. The upper wall 35 and the front wall 37 are formed so as to open according to the shape of the FL bolt block 8 (see FIG. 6 for the opening shape). In addition, although it does not specifically limit, the part corresponding to a lower wall shall be formed in the shape which opens entirely.

  A plurality of guide portions 38, a lock portion 39, and a hood portion 40 are formed in the FL bolt block attaching / detaching portion 34. The plurality of guide portions 38 and the lock portion 39 are disposed and formed in a pair on the left and right.

  The plurality of guide portions 38 are formed so as to cut out the openings of the front wall 37. The plurality of guide portions 38 are formed inside the left and right side walls 36 so as to extend in the attaching / detaching direction of the FL bolt block 8 (which coincides with the arrow R direction). The plurality of guide portions 38 are formed as portions for guiding the FL bolt block 8 when the FL bolt block 8 is attached or detached.

  The lock portion 39 is formed as a portion for locking a lock arm portion 68 (described later) of the FL bolt block 8. The hood portion 40 is formed as a substantially enclosed portion that protrudes upward from the opening edge of the upper wall 35. In the present embodiment, the hood portion 40 is formed in a curved wall shape. Moreover, the hood part 40 is also formed so that an upper side and a front side may open. As for the hood portion 40, the upper opening does not interfere with the screwing (tightening) operation of the nut 48 described later, and the front opening does not interfere with the removal operation of the FL bolt block 8. The size is set.

  The bus bars 25 and 26 are formed by pressing a conductive metal plate. The bus bars 25 and 26 are circuit components and are formed so as to have desired paths, respectively. The bus bars 25 and 26 are an alternator-side bus bar and a battery-side bus bar.

  A large number of tabs 41 as electrical connection portions are formed between the bus bars 25 and 26. The tab 41 is arranged and formed in accordance with the positions of the cavities 27 to 31. The bus bars 25 and 26 extend in the direction of the arrow R (see FIG. 1) and are formed so that a large number of tabs 41 protrude along the way.

  The bus bar 25 has a first connection partner 42 that is a connection partner when viewed from the FL bolt block 8. The bus bar 26 also has a second connection partner 43 that is a connection partner when viewed from the FL bolt block 8. The first connection partner 42 and the second connection partner 43 are arranged and formed so as to be located at one end in the direction of arrow R (see FIG. 1). Further, the first connection partner 42 and the second connection partner 43 are arranged and formed so as to protrude into the internal space of the FL bolt block attaching / detaching portion 34.

  The first connection partner 42 and the second connection partner 43 are parallel plate-like terminals arranged at predetermined intervals in the vertical direction, and each have a bolt insertion portion 44. The bolt insertion portion 44 is formed in a U-shaped cutout shape. The notch direction of the bolt insertion portion 44 is assumed to coincide with the attaching / detaching direction (the arrow R direction) of the FL bolt block 8.

  When viewed from the FL bolt block 8, the terminal fitting 7 (see FIG. 1) is assumed to be the third connection partner. The terminal fitting 7 as the third connection partner is formed in, for example, the shape shown in the figure (see FIG. 1) by pressing a conductive metal plate. The terminal fitting 7 has a plate-like electrical contact portion, and has a bolt insertion portion 45 in the electrical contact portion. The bolt insertion portion 45 of the terminal fitting 7 is formed in a shape that becomes a circular through hole.

  7 to 9, the FL bolt block 8 includes a block-like member having a bolt, that is, a bolt block 46 and the main fusible link 23. The FL bolt block 8 is a functional component in which the main fusible link 23 is detachably integrated with the bolt block 46 along the arrow R direction (see FIG. 1).

  7 and 8, the bolt block 46 includes a collective tightening bolt 47, a nut 48, a block portion 49, and a fusible portion cover 50.

  The collective fastening bolt 47 includes a conductive bolt body 51 and an insulating insulating portion 52 that is integrated with the bolt body 51. The bolt main body 51 has a bolt head 53 having four corners having an R shape and a bolt shaft portion 54 having a substantially cylindrical shape. The bolt shaft portion 54 is erected at the center position of the bolt head portion 53, and the insulating portion 52 is disposed at the base end portion. On the tip end side of the bolt shaft portion 54, a screw portion 55 serving as a screwed portion of the nut 48 is disposed. The screw portion 55 is disposed at a position exposed to the outside of the block portion 49.

  The insulating portion 52 is a resin portion that is insert-molded (as an example) into the bolt body 51, and includes a small-diameter first annular portion 56 and a large-diameter second annular portion 57. Yes. The first annular portion 56 is formed according to the diameter of the screw portion 55. The first annular portion 56 is formed as a portion that prevents the bolt insertion portion of the connection partner from making electrical contact with the bolt shaft portion 54. The second annular portion 57 is formed as a portion on which the connection partner is placed. The second annular portion 57 is also formed as a portion that prevents the connection partner from making electrical contact with the bolt head 53.

  A known nut 48 is used. The shape of the nut 48 is not particularly limited as long as it can be fastened by being screwed into the collective fastening bolt 47. A spring washer (not shown) may be added when the nut 48 is screwed.

  The block portion 49 is a resin molded product, and has a structural portion that is detachable along the arrow R direction (see FIG. 1) with respect to the FL bolt block attaching / detaching portion 34 (see FIG. 6) of the block housing 24. Yes.

  The block portion 49 has an upper wall 58, a lower wall 59, left and right side walls 60, a front wall 61, and an opening 62 formed at the position of the rear wall, and is formed in a substantially box shape. ing. The block portion 49 includes a bolt guide portion 63 and plate-like terminal arrangement portions 64 and 65.

  The upper wall 58 is formed so that the collective fastening bolt 47 can be inserted, and an upper plate-like terminal 74 described later of the main fusible link 23 can be disposed. Specifically, it is formed so as to have the shaft portion insertion slit 66 and the plate-like terminal arrangement portion 64 described above. The shaft insertion slit 66 is formed so as to be cut out in a U shape from the opening 62. The shaft portion insertion slit 66 is formed in accordance with the diameter of the screw portion 55 of the collective tightening bolt 47. The plate-like terminal arrangement portion 64 is formed so that the upper wall 58 is recessed by one step by the thickness of the plate-like terminal 74 described later.

  The lower wall 59 is formed in a shape such that the collective fastening bolt 47 does not fall.

  The left and right side walls 60 have a guided portion 67 and a lock arm portion 68. The guided portion 67 and the lock arm portion 68 are disposed and formed in a pair on the left and right. The guided portion 67 is a portion guided by the guide portion 38 (see FIG. 6) of the FL bolt block attaching / detaching portion 34, and a plurality of guided portions 67 are formed. The guided portion 67 is formed in a rib shape extending in the arrow R direction (see FIG. 1).

  The lock arm portion 68 is formed as a portion that fits into the lock portion 39 of the FL bolt block attaching / detaching portion 34 to form a locked state. The lock arm portion 68 is formed in a flexible cantilever arm shape. The lock arm portion 68 is disposed and formed at an upper and lower intermediate position of the side wall 60. The lock arm portion 68 is formed as a structural portion that is unlocked when bent so as to approach the side wall 60.

  In addition to the above, the side wall 60 is also formed with a lock portion 69 for the fusible portion cover 50. The lock portion 69 is formed in a projection shape that becomes a claw shape.

  The front wall 61 is arranged and formed as a wall on the side covered with the side cover 5 (see FIGS. 1 and 2). The front wall 61 is formed with a recess 70 and an insertion protrusion (not shown) that can accommodate and fix a fusible portion 73 described later of the main fusible link 23. The insertion protrusion is formed so that it can be held by being inserted into a holding hole 78 (described later) of the main fusible link 23. In the present embodiment, a pair of insertion protrusions and holding holes 78 are arranged and formed in an oblique direction (diagonal direction) intersecting with the vertical direction P.

  In addition to the above, the recess 70 is also formed with an insertion opening (not shown) for a lower plate-like terminal 75 (to be described later) of the main fusible link 23.

  The opening 62 is formed so that the collective fastening bolt 47 can be attached and the second connection partner 43 of the bus bar 26 can be inserted.

  The bolt guide portion 63 is formed as a portion for holding and guiding the collective tightening bolt 47 inserted into the block portion 49. The bolt guide portion 63 is disposed below the shaft portion insertion slit 66 and is formed to be a pair on the left and right. The bolt guide part 63 of the present embodiment is formed in a substantially fish-like shape as shown in the figure so as not to be a thick part (the shape is an example. For example, in the second embodiment) There are also shapes that will explain). The collective tightening bolt 47 extends in the vertical direction of the arrow P (see FIG. 1) when held and guided by the bolt guide portion 63.

  The plate-like terminal arrangement portion 65 is arranged and formed at the lower end of the bolt guide portion 63. The plate-like terminal arrangement portion 65 is the same portion as the plate-like terminal arrangement portion 64 of the upper wall 58 and is formed so as to be recessed one step by the thickness of the plate-like terminal 75 described later. The plate-like terminal arrangement portion 65 is connected between a plate-like terminal 75 to be described later inserted into this portion and the insulating portion 52 of the collective tightening bolt 47 inserted into the bolt guide portion 63 (second of the bus bar 25). It is arranged and formed at a position where the connection partner 43) enters.

  The fusible part cover 50 is a resin member that covers a fusible part 73 (to be described later) of the main fusible link 23, and is a rectangular flat plate cover body 71 and locks arranged and formed at four corner positions of the cover body 71. Part 72. The soluble part cover 50 is formed using a transparent resin material in order to make the state of the soluble part 73 described later visible from the outside. The lock part 72 is formed in a shape such that the lock part 72 is hooked and locked to the lock part 69 of the block part 49. The fusible part cover 50 is formed to be detachable from the block part 49 along the arrow R direction (see FIG. 1).

  The main fusible link 23 is formed by pressing a conductive metal plate. The main fusible link 23 includes a fusible portion 73, and an upper plate-like terminal 74 and a lower plate-like terminal 75 that are respectively continuous above and below the fusible portion 73. The fusible portion 73 is formed with a fusible portion main body 76 that can be melted and a connecting portion 77 that connects the fusible portion main body 76 to the plate-like terminals 74 and 75. Each connecting portion 77 is formed with a circular holding hole 78 that is inserted and held in an insertion protrusion (not shown) of the main fusible link 23.

  Both the upper plate terminal 74 and the lower plate terminal 75 are formed in the same shape. The upper plate-like terminal 74 and the lower plate-like terminal 75 are arranged so as to oppose each other with a predetermined interval in the vertical direction. A bolt insertion portion 79 is formed in the upper plate-like terminal 74 and the lower plate-like terminal 75. The bolt insertion part 79 is formed so as to be cut out in a U shape from the terminal tip. The bolt insertion portion 79 is formed in accordance with the diameter of the screw portion 55 of the collective tightening bolt 47. The upper plate-like terminal 74 and the lower plate-like terminal 75 are formed at portions that can be bent substantially at right angles to the respective connecting portions 77 of the fusible portion 73. The main fusible link 23 is formed in a substantially U-shape. The main fusible link 23 is detachable along the direction of arrow R (see FIG. 1).

  In the above configuration and structure, the collective tightening bolt 47 is attached through the opening 62 of the block portion 49, and then the upper plate-like terminal 74 and lower plate terminal arrangement portions 64 and 65 of the block portion 49 are attached. When the main fusible link 23 is assembled so that the plate-like terminals 75 are arranged, and the fusible portion 73 of the main fusible link 23 is covered with the fusible portion cover 50, the nut 48 is screwed in before being screwed. As a state, the FL bolt block 8 of FIG. 7 is formed. The FL bolt block 8 is obtained by integrating the main fusible link 23 with the bolt block 46.

  9 and 10, when the FL bolt block 8 is inserted into the FL bolt block attaching / detaching portion 34 along the direction of arrow R from the front of the cassette block 19 and fitted, it is assembled to the block housing 24 of the cassette block 19 at this time. The first connection partner 42 and the second connection partner 43 of the bus bars 25 and 26 overlapped with the upper plate terminal 74 and the lower plate terminal 75 of the main fusible link 23 of the FL bolt block 8. Placed in.

  When the FL bolt block 8 is fitted to the FL bolt block attaching / detaching portion 34, the pair of guided portions 67 on the left and right are guided by the guide portion 38 of the FL bolt block attaching / detaching portion 34.

  The FL bolt block 8 is locked when the pair of left and right lock arm portions 68 are fitted to the lock portion 39 of the FL bolt block attaching / detaching portion 34.

  In the FL bolt block 8, when the locked state is formed, the screw portion 55 of the collective tightening bolt 47 is disposed inside the hood portion 40 of the FL bolt block attaching / detaching portion 34.

  The cassette block 19 in a state in which the FL bolt block 8 is inserted and fitted into the FL bolt block attaching / detaching portion 34 is assembled to the housing 9 as shown in FIGS. By this assembly, the electrical junction box body 2 is formed.

  As shown in FIG. 2, when the terminal fitting 7 is set on the FL bolt block 8 and the nut 48 is screwed in, the electrical connection box body 2 completes the electrical connection of the terminal fitting 7 itself. At the same time, the electrical connection between the upper plate-like terminal 74 of the main fusible link 23 and the first connection partner 42 of the bus bar 25 is also completed. At the same time, the electrical connection between the lower plate-like terminal 75 of the main fusible link 23 and the second connection partner 43 of the bus bar 26 is also completed.

  As the nut 48 is screwed in, the upper plate-like terminal 74 and the first connection partner 42 that have been overlapped so far, and the lower plate-like terminal 75 and the second connection counterpart 43 are surely in surface contact. The electrical connection is complete.

  As can be seen from the above, when connecting the terminal fitting 7, the nut 48 can be screwed to complete the simultaneous fastening at three locations (the nut 48 can be connected together by tightening the nut 48).

  Regarding the connection portion of the terminal fitting 7, this portion is covered and protected by the side cover 5. When the side cover 5 is removed, the connection portion of the terminal fitting 7 is easily exposed. Hereinafter, the side cover 5 will be briefly described.

  The side cover 5 is a resin molded product and has a shape that can be fitted to the fitting portion on the one side of the housing 9 of the electrical connection box body 2 and a shape that can cover the connection portion of the terminal fitting 7. Is formed. A plurality of lock portions 80, 81, and 82 are formed on the side cover 5. The lock part 80 is formed in a shape that fits into the lock part 13 of the electrical junction box body 2. The lock portion 81 is formed in a shape that fits into the lock portion 83 of the upper cover 3. Further, the lock portion 82 is formed in a shape that fits into the lock portion 84 of the lower cover 4.

  In the above configuration and structure, the electrical junction box 1 can be detached when the nut 48 is unscrewed after the side cover 5 is removed. Also, the FL bolt block 8 can be removed from the FL bolt block attaching / detaching portion 34.

  In FIG. 4, when the pair of lock arm portions 68 are bent to release the locked state, the FL bolt block 8 can be removed in the direction of arrow R (can be removed from the lateral direction). The removal of the FL bolt block 8 can also remove the main fusible link 23.

  As described above with reference to FIGS. 1 to 10, the present invention uses the collective tightening bolt 47 and the nut 48, and the upper plate-like terminal 74 and the lower side of the main fusible link 23 facing each other. The plate-like terminal 75 and the first connection partner 42 and the second connection partner 43 of the bus bars 25 and 26 can be connected together. Further, according to the present invention, it is possible to make a collective connection including the terminal fitting 7. The present invention can make a batch connection without increasing the number of the collective tightening bolts 47 and nuts 48. In the present invention, it is also possible to cancel the connection state from the above.

  According to the present invention, it is possible to improve workability and maintainability.

  Embodiment 2 will be described below with reference to the drawings. FIG. 11 is a perspective view showing a modification of the FL bolt block. FIG. 12 is an exploded perspective view of the FL bolt block of FIG. In addition, the same code | symbol is attached | subjected to the same component as the said Example 1, and detailed description is abbreviate | omitted.

  11 and 12, the FL bolt block 101 includes a bolt block 102, a main fusible link 23, and a receiving member 103. The FL bolt block 101 is a functional component in which the main fusible link 23 is detachably integrated with the bolt block 102.

  The bolt block 102 includes a collective tightening bolt 47 having an insulating portion 52, a nut 48 screwed into the collective tightening bolt 47, a block portion 104 to which the collective tightening bolt 47 is attached, and a fusible portion 73 of the main fusible link 23. And a fusible part cover 50 that covers the surface.

  The block portion 104 has an upper wall 58, a lower wall 59, left and right side walls 60, a front wall 61, and an opening 62 formed at the position of the rear wall, and is formed in a substantially box shape. ing. The block unit 104 includes a bolt guide unit 105 and plate-like terminal arrangement units 64 and 65.

  The bolt guide portion 105 is formed as a portion for holding and guiding the collective fastening bolt 47 with the receiving member 103 inserted into the block portion 104 (the receiving member 103 will be described later). The bolt guide portion 105 is disposed below the shaft portion insertion slit 66 and is formed to be a pair on the left and right. The bolt guide portion 105 of the present embodiment is formed according to the shape of the receiving member 103.

  The receiving member 103 includes an upper plate-like terminal 74 and a lower plate-like terminal 75 opposite to each other of the main fusible link 23, a first connection partner 42 and a second connection partner 43 of the bus bars 25 and 26 (see FIGS. 6 and 6). It is formed in a member that can be used as a receptacle for electrical connection with FIG. The receiving member 103 is formed into a member that can facilitate management of torque applied to the nut 48.

  In this embodiment, the receiving member 103 includes a first receiving portion 106, a second receiving portion 107, a connecting body portion 108 that connects them, and a shaft portion insertion hole 109 that serves as an insertion portion for the collective tightening bolt 47. Have. Both the 1st receiving part 106 and the 2nd receiving part 107 are formed in the shape which becomes the same cyclic | annular form. The shaft portion insertion hole 109 is formed to penetrate in accordance with the diameter of the screw portion 55 of the collective tightening bolt 47.

  In this embodiment, the shaft portion insertion hole 109 is formed by processing a metal cylinder member. Further, the first receiving portion 106 and the second receiving portion 107 are made of resin and are formed so as to be integrated with the shaft portion insertion hole 109. The shaft portion insertion hole 109 may be made of resin as long as it has sufficient rigidity. The first receiving portion 106 and the second receiving portion 107 may be formed of a member having a slight elasticity.

  Needless to say, even when the FL bolt block 101 is used in the above configuration and structure, the same effects as those of the first embodiment can be obtained.

  Here, a further effect of the present invention will be described with reference to a comparative example.

  FIG. 13 is a perspective view of a cassette block assembly as a comparative example. FIG. 14 is an exploded perspective view of the comparative example of FIG.

  In FIGS. 13 and 14, reference numeral 201 indicates a cassette block assembly. The cassette block assembly 201 includes a cassette block 202, a main fusible link 204 that is mounted in the cavity 203 of the cassette block 202, and a bolt block 205 that is detachably attached to one end of the cassette block 202. Yes.

  The cavity 203 is disposed and formed at an intermediate position of the cassette block 202. The main fusible link 204 mounted in the cavity 203 having such an arrangement includes a pair of plate-like terminals 207 having bolt insertion portions 206, and is connected and fixed by two bolts 208. .

  The bolt block 205 has a stud bolt 209 and functions as a terminal mounting portion. The stud bolt 209 is connected to a terminal fitting provided at the end of an electric wire (not shown). This connection is made by screwing a nut (not shown).

  In the above configuration and structure, the cassette block assembly 201 has a cavity 203 dedicated to the main fusible link 204, two bolts 208, and the like. Therefore, compared with the present invention described in the first embodiment, the number of parts is increased by the amount of the two bolts 208 and a nut (not shown) to be screwed in, as well as the cavity 203. It will end up.

  In addition, the cassette block assembly 201 has a total of three fastening portions for electrical connection, two at the main fusible link 204 and one at the terminal fitting (not shown) (bolt block 205). doing. Therefore, as compared with the present invention described in Example 1 and the like, not only the workability is deteriorated but also the maintainability is deteriorated.

  As described above, according to the present invention, in addition to the effects of the first embodiment, it can be seen that there is an effect that the size reduction, the space saving, and the number of parts can be reduced.

  In addition, the present invention can of course be modified in various ways within the scope not changing the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Electrical junction box 2 ... Electrical junction box main body 3 ... Upper cover 4 ... Lower cover 5 ... Side cover 6 ... Electric wire 7 ... Terminal metal fitting (3rd connection partner)
DESCRIPTION OF SYMBOLS 8 ... FL bolt block 9 ... Housing 10 ... Cassette block assembly 19 ... Cassette block 23 ... Main fusible link 24 ... Block housing (predetermined member)
25, 26 ... bus bar 34 ... FL bolt block attachment / detachment part 42 ... first connection partner 43 ... second connection partner 44, 45 ... bolt insertion part 46 ... bolt block 47 ... collective tightening bolt 48 ... nut 49 ... block part 50 ... possible Fusing part cover 51 ... Bolt body 52 ... Insulating part 53 ... Bolt head part 54 ... Bolt shaft part 55 ... Screw part 73 ... Soluble part 74, 75 ... Plate-like terminal 79 ... Bolt insertion part 101 ... FL bolt block 102 ... Bolt Block 103 ... receiving member 104 ... block part

Claims (5)

Conductive one and the other plate-like terminals opposite each other having a bolt insertion part,
When connecting the conductive first connection partner having the bolt insertion part and the one plate-like terminal, and connecting the conductive second connection partner having the bolt insertion part and the other plate-like terminal. Are collectively connected using a collective tightening bolt that has an insulating portion and is inserted into each of the bolt insertion portions, and a nut that is screwed into the collective tightening bolt,
In releasing the connection, the screw connection between the collective tightening bolt and the nut is released to release the collective connection. In the connection structure between the plate-like terminal and the connection partner according to claim 1,
A conductive third connection partner having a bolt insertion part and an insulating block part provided at a connection position of the third connection partner, and the collective tightening bolt is engaged with the block part, A plate-like terminal and a connection partner, wherein the third connection partner is collectively connected by screwing together the collective tightening bolt and the nut, or the collective connection is canceled including the third connection partner by unscrewing. Connection structure. In the connection structure between the plate-like terminal and the connection partner according to claim 2,
The said block part is formed so that attachment or detachment is possible with respect to a predetermined member. The connection structure of the plate-shaped terminal and connection partner characterized by the above-mentioned. In the connection structure of the plate-like terminal according to any one of claims 1 to 3 and a connection partner,
The one plate-like terminal and the other plate-like terminal are connected by a conductive soluble portion, and the one plate-like terminal or the other plate-like terminal is connected to the insulating portion of the collective tightening bolt. A connection structure between a plate-like terminal and a connection partner, characterized by being arranged. An electrical connection box comprising the connection structure between the plate-like terminal according to claim 1 and a connection partner.

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