JPH10255876A - Attachting structure of round terminal in electric junction box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the mounting structure of a round terminal which can conduct the attaching work easily and efficiently. SOLUTION: A bus bar 15 is disposed on an area 27 where a lower case 14 is attached, and a bolt 29 is inserted in the bus bar 15 and screwed in a square nut 28. The external thread part of the bolt 29 is screwed in an engagement hole 41 for prevention of looseness. A temporary setting part for temporarily-setting a round terminal 20 to dispose it on the bus bar 15 is fitted at the lower case 14. A notch 22B for inserting the bolt dispose the round terminal 20 on the bus bar 15 is formed at the round terminal 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a round plate terminal in an electric junction box, and more particularly, to a mounting structure of a round plate terminal in an electric junction box for accommodating various electric devices used in an electric circuit of an automobile. It relates to the mounting structure.

[0002]

2. Description of the Related Art Junction blocks are used to collectively connect branch connections of wire harnesses for automotive electrical components and to integrate fuses and the like into one place. In order to supply power to the junction block, a bus bar formed by punching a metal plate such as a copper plate is used. To electrically connect the power cable to the bus bar, a round plate terminal is fixed to an end of the power cable.

FIG. 7 shows a mounting structure of a round plate terminal in a conventional electric junction box. The electric connection box 10 is the case body 1
1 and a lid 12. The case body 11 includes an upper case 13 and a lower case 4. The upper case 13, the lower case 14, and the lid 12 are formed by injection molding using a synthetic resin having excellent heat resistance such as a polypropylene resin. Upper case 13 and lower case 1
4 is fitted with the bus bar 15 interposed therebetween.

The bus bar 15 is formed by stamping a metal plate such as a copper plate, and has a base 16 extending into the upper case 13.
A standing portion 17 erected from the base portion 16;
And a tab portion 18 which is orthogonal to. A bolt insertion hole 19 is provided through the tab portion 18.

[0005] As shown in FIG. 9, the round plate terminal 20 includes a base 21 and a tab 22 perpendicular to the base 21.
The power cable 25 is crimped to the base 21 by the locking pieces 23, and the electric wire 25A is crimped to the locking pieces 24D. As shown in FIG. 8, a bolt insertion hole 22 </ b> A is provided through the tab portion 22 of the round plate terminal 20.

An attached part 2 for attaching and connecting the bus bar 15 and the round plate terminal 20 to a part of the lower case 14.
7 are formed. As shown in FIGS. 7 and 9, a square nut 28 is embedded in the mounted portion 27 so as to be immovable and non-rotatable. A bolt 29 is screwed into the square nut 28 when the bus bar 15 and the round plate terminal 20 are mounted. The mounting portion 27 has a through hole 30 below the square nut 28.
Are formed, and the through holes 30 allow the bolts 29 to pass with a margin when the bolts 29 are screwed.

[0008] As shown in FIGS. 8 and 9, a slit 31 is provided in a part of the lower case 14 on the side of the attached portion 27. The slit 31 is the base 21 of the round plate terminal 20.
Can be inserted with a margin, and the round plate terminal 20 cannot be rotated.

To attach the round plate terminal 20 to which the power cable 25 is connected to the electric junction box 10 configured as described above, first, with the lid 12 removed from the case body 11, Fifteen tab portions 18 are attached portions 27
Arrange so that it contacts the top. Next, the base 21 is inserted into the slit 31 so that the tab 22 of the round plate terminal 20 abuts on the tab 18 of the bus bar 15.

Then, the bolt insertion hole 2 of the round plate terminal 20 is formed.
By screwing the bolt 29 to the square nut 28 while aligning the 2A and the bolt insertion hole 18A of the bus bar 15 with the square nut 28, the bus bar 15 and the round plate terminal 20 are fixed to the mounting portion 27 and electrically connected. Connected to.

[0010]

However, when the round plate terminal 20 is mounted on the mounting portion 27, the base portion 21 is held with one hand.
Of the locking piece 23 and hold the bolt 29 with the other hand.
Must be screwed into the square nut 28. Therefore, not only the workability and work efficiency are low, but also the bolt 2
9 and the square nut 28 do not mesh well with each other, and there is a problem that they are easily tightened diagonally.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to mount a round plate terminal in an electric junction box in which the work of mounting the round plate terminal can be performed easily and efficiently. It is to provide a structure.

[0012]

In order to achieve the above object, according to the first aspect of the present invention, a bus bar is disposed on a mounting portion provided on a case body, and a round plate terminal is disposed on the bus bar. A connection structure for connecting a round plate terminal in an electrical junction box, wherein the round plate terminal is mounted by inserting a bolt into the bus bar and the round plate terminal and screwing into a nut embedded in the mounting portion. , A bolt is inserted into a bus bar disposed on the mounting portion and screwed into the nut, and the mounting portion is provided with an engagement hole for preventing loosening by screwing the bolt screwed into the nut, and the case body is provided. Is provided with a temporary fixing portion for temporarily fixing the round plate terminal along with the arrangement of the round plate terminal on the bus bar, and the bolt is inserted into the round plate terminal along with the arrangement on the bus bar. Electrical junction box with cutout for insertion Mounting structure for definitive eyelet terminal and its gist the.

According to a second aspect of the present invention, the temporary fixing portion is provided in the slit for inserting the round plate terminal in a direction perpendicular to the plate thickness direction, and is provided in the slit, and the round plate on the opening side of the slit is provided. The gist of the present invention is a mounting structure of a round plate terminal in an electric junction box, which comprises an engaging portion for contacting an end surface of the terminal and restricting movement of the round plate terminal in a direction orthogonal to the plate thickness direction.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. Note that the same elements as those described in FIGS. 7 to 9 are denoted by the same reference numerals to avoid redundant description. In addition, the description will focus on differences from the above-described conventional electric connection box.

FIGS. 1 and 6 show an electric connection box 40 according to this embodiment.
Is shown. In detail, FIG. 1 shows a cross section of the electric connection box 40 at the time of product shipment, and FIG. 6 shows a cross section of the electric connection box 40 at the time of connection of the round plate terminals.

As shown in FIG. 1, an engagement hole 41 is formed in the lower part of the
Are formed. The diameter of the engagement hole 41 is set slightly smaller than the diameter of the male screw portion of the bolt 29. When the bolt 29 is screwed into the square nut 28, the engaging hole 41 is cut by a female screw by a male screw portion of the bolt 29, thereby preventing the bolt 29 from being loosened.

As shown in FIGS. 2 and 4, an elastically deformable locking piece 42 as a locking portion is formed on the inner surface of the slit 31 provided in the lower case 14. Locking piece 4
2 is formed so as to be curved inward of the slit 31, and the locking piece 42 is formed in the slit 3 of the round plate terminal 20.
At the time of insertion into the inside 1, it comes into contact with the end face of the base 21 on the opening side of the slit 31, and regulates the movement of the round plate terminal 20 in the width direction. In the present embodiment, the locking piece 42 and the slit 31 constitute a temporary fixing portion of the round plate terminal 20. That is, the slit 31 regulates the movement and rotation of the round plate terminal 20 in the plate thickness direction, and the locking piece 42 regulates the movement of the round plate terminal 20 in the width direction. 20 is temporarily fixed.

As shown in FIG. 2, the tab portion 22 of the round plate terminal 20 in the present embodiment has an opening in the same direction as the insertion direction of the round plate terminal 20, that is, with respect to the opening direction of the slit 31. A notch 22B that opens in the opposite direction is formed. The notch 22B is provided with a slit 31 of the round plate terminal 20 in a state where the bolt 29 is screwed into the square nut 28.
The bolt 29 can be inserted based on the insertion into the inside.

The electric junction box 40 constructed as described above
Disposes the bus bar 15 on the mounting portion 27 and
9 is screwed into the square nut 28, and the product is shipped in a state where the distal end of the male screw portion of the bolt 29 is screwed into the engagement hole 41.

In order to mount the round plate terminal 20 to which the power cable 25 is connected to the electric connection box 40, the round plate terminal 2 with the lid 12 removed from the case body 11 is attached.
0 base 21 is inserted into slit 31. At this time,
When the base 21 of the round plate terminal 20 comes into contact with the locking piece 42,
The locking piece 42 is elastically deformed to allow the round plate terminal 20 to move inward of the slit 31. Further, the bolt 29 is inserted into the notch 22B based on the insertion of the round plate terminal 20 into the slit 31.

When the round plate terminal 20 is completely inserted into the slit 31, the locking piece 31 is elastically restored and comes into contact with the end face of the base 21, thereby restricting the movement of the round plate terminal 20 in the width direction. Then, the round plate terminal 20 is temporarily fixed.

Thereafter, the bus bar 15 and the round plate terminal 20 are fixed to and electrically connected to the mounting portion 27 by screwing the bolt 29 while cutting the female screw into the engaging hole 41.

Since the electric junction box 40 of the present embodiment is configured as described above, the following effects can be obtained. If the round plate terminal 20 is inserted into the slit 31 when attaching the round plate terminal 20 to the electric connection box 40, the round plate terminal 20 can be temporarily fixed by the slit 31 and the locking piece 42. . Therefore, the base 2 of the round plate terminal 20 can be held with one hand.
It is not necessary to hold down 1, and workability and work efficiency can be improved.

A bolt 29 is screwed into the square nut 28, and the tab portion 22 of the round plate terminal 20 is attached to the round plate terminal 20.
Since the notch 22B through which the bolt 29 is inserted is provided with the insertion of the bolt, it is not necessary to remove the bolt 29 from the square nut 28, and the workability and work efficiency can be further improved.

Furthermore, since the bolt 29 is already screwed into the square nut 28 when the electric connection box 40 is shipped, oblique tightening can be prevented when the bolt 29 is tightened.

Further, the engagement hole 41 can prevent the bolt 29 from being loosened when the bolt 29 is screwed into the square nut 28, so that the bolt 29 is prevented from falling off due to vibration or the like at the time of product shipment. it can. Further, when the bolt 29 is screwed into the square nut 28, the distal end of the male screw portion is screwed into the engagement hole 41, so that a constant interval W can be secured as shown in FIG.

The above embodiment may be modified as follows, and the same operation and effect can be obtained in such a case. In the above-described embodiment, the elastically deformable locking piece 42 is provided as the locking portion, but a locking projection may be provided instead.

[0028]

As described in detail above, according to the present invention,
It is possible to provide a mounting structure of a round plate terminal in an electric junction box in which the mounting operation of the round plate terminal can be easily and efficiently performed.

[Brief description of the drawings]

FIG. 1 is a partial front sectional view of an electric connection box before a round plate terminal is mounted.

FIG. 2 is a plan view showing a slit and a locking piece.

FIG. 3 is a partial sectional side view of the electric connection box when a round plate terminal is mounted.

FIG. 4 is an enlarged plan sectional view showing a slit and a locking piece;

FIG. 5 is a bottom view showing an engagement hole.

FIG. 6 is a partial front sectional view of the electric connection box when a round plate terminal is mounted.

FIG. 7 is a partial front sectional view of a conventional electric junction box after a round plate terminal is attached.

FIG. 8 is a plan view showing a slit of a conventional electric junction box.

FIG. 9 is a partial sectional side view of a conventional electric junction box when a round plate terminal is mounted.

[Explanation of symbols]

14: lower case constituting the case body; 15: bus bar; 20: round plate terminal; 22B: notch; 27: attached portion; 28: square nut; 29: bolt; 31: slit constituting the temporary fixing portion; Reference numeral 41 denotes an engagement hole, and reference numeral 42 denotes a locking piece serving as a locking portion that forms a temporary fixing portion.

Claims (2)

[Claims] 1. A bus bar is disposed on a mounting portion provided on a case main body, a round plate terminal is disposed on the bus bar, and a bolt is inserted through the bus bar and the round plate terminal to form the mounting portion. A mounting structure for a round plate terminal in an electric junction box in which a round plate terminal is mounted by being screwed into a nut embedded in a mounting portion, wherein a bolt is inserted through a bus bar disposed on the mounting portion. The fitting portion is provided with an engagement hole for preventing loosening by screwing a bolt screwed into the nut, and the case body is provided on the bus bar of the round plate terminal. A temporary fixing portion for temporarily fixing the round plate terminal is provided along with the arrangement, and a cutout for inserting and inserting the bolt into the round plate terminal along with the arrangement on the bus bar is provided. In the formed electrical junction box Attachment structure in the form plate terminal. 2. The mounting structure of a round plate terminal in an electric junction box according to claim 1, wherein the temporary fixing portion includes a slit for inserting the round plate terminal in a direction orthogonal to a plate thickness direction. A locking portion provided in the slit for restricting movement of the round plate terminal in a direction orthogonal to a plate thickness direction by contacting an end surface of the round plate terminal on the opening side of the slit; Mounting structure for round plate terminals in an electrical junction box consisting of: