JP3414597B2 - Connection terminal fixing structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection terminal fixing structure for fastening various connection terminals with bolts, and particularly to a fusible mounted on a fusible link box or an electric connection box mounted on an automobile. It is suitable for electrically connecting a bull link, a bus bar, and a crimp terminal to which an electric wire is connected.

[0002]

2. Description of the Related Art Today's automobiles are becoming more automated, and along with this, various electronic devices for driving control, electric connection boxes, fusible link boxes, etc. are mounted. The fusible link box is provided with a fuse holder for mounting the fusible link, and is configured to connect a bus bar or a wire harness to a connection terminal of the fusible link mounted on the fuse holder by a bolt. Hereinafter, as an example of the conventional fusible link box, an outline of the "fixing structure of the fusible link box" disclosed in Japanese Utility Model Laid-Open No. 1-98458 will be described.

As shown in FIG. 14, a fusible link box (hereinafter, simply referred to as a box) 34 includes a power supply terminal 33 connected and fixed to a battery press terminal (not shown). The power source side terminal plate 37, which is electrically connected, is integrally provided with a connection plate 43 protruding outward from the side wall 34b of the box 34. A stay 44 is provided outside an electrical component such as an electric connection box, and the stay 44 is provided with a connecting plate 43 and a connecting terminal 45 of an electric wire 40 for connecting an alternator, a bolt 46 and a nut 4.
Tighten and fix with 7.

A bolt insertion hole 43a is provided in the connection plate 43 formed by integrally bending the lower end edge of the power supply connection plate 37. Further, the fusible link 36 in the box 34 and the power source side terminal plate 37 and the load side terminal 38 are connected to each other by fastening with bolts 39, and a fastening metal fitting 48 is used for this. The tightening metal fitting 48 is the board portion
A screw cylinder 48b is erected on 8a. When fixing the fusible link 36, the power source side terminal plate 37, the load side terminal 38, etc., the board portion 48a is set so as to face the central partition formed in the box 34. As a result, the connection terminal 36a of the fusible link 36 is positioned outside the screw cylinder 48b, and the insertion hole 36b communicates with the screw cylinder 48b. In this state, if the connection terminal 36b of the fuse break link 36 and the load side terminal 38 are tightened to the screw cylinder 48b with the bolts 39, the terminals can be securely fixed without damage.

[0005]

However, in the structure of the box 34, when tightening the bolt 39,
There were the following problems. That is, when tightening the bolt 39, the bolt 39 is held by a tool such as a wrench, moved to the tightening position, then aligned with the nut cylinder 48b, and then tightened. On the other hand, the box 34, the electric connection box, and the like are mounted in an engine room or a console box of an automobile, but they are all narrow spaces, and even if bolting work is performed, the working space is limited. In such a working environment, the longer the distance to the tightening position, the more difficult it is to align the bolt with the tightening position and the greater the likelihood that it will fall out of the wrench.

Further, if the distance to the tightening position is long, it is inevitable that a long tool such as a wrench must be used. In this case, the rotational shake peculiar to the long tool is likely to occur, and this shake hinders the tightening work. Furthermore,
When tightening with the conventional structure, use one hand to align the hole of the connection terminal with the hole of the other side and hold it down.
It was very inconvenient because the other hand had to be operated and tightened with a tool such as a wrench, and the workability was poor and both hands were completely blocked.

It is an object of the present invention to provide a connection terminal fixing structure capable of improving workability when fixing various connection terminals with bolts and nuts and preventing falling of bolts and the like.

[0008]

The above-mentioned problems relating to the present invention can be solved by the connection terminal fixing structure described in 1) to 3) below. 1) Fusible link holder provided on the upper surface of electrical equipment
-And the lower center partition of the fusible link holder
Attached to each nut embedding part arranged on both sides of the plate
For each nut and the fusible link holder
When mounting the fusible link,
Each fuse terminal that can be slidably contacted with the screwing surface with the bolt, and
From the lower opening of the electrical equipment along the fuse terminal
Connector terminals that are plugged into the
From at least one side end, at least one screw of each nut
Each extending toward the mating surface and communicating with the opening
And a guide part, wherein the guide parts are
Guide the insertion and screwing operation of the nuts toward the screwing surface
A fixing structure for connecting terminals, characterized in that 2) The fuse terminal that is in sliding contact with the threaded surface of each nut
Insert the adjacent connection terminal with the bus bar in between
The mouth temporarily locks the bulk of each connection terminal at one end.
A connecting terminal, which is characterized in that
Constant structure . 3) The above-mentioned insertion port is the one described above when tightening each bolt.
It is provided with a side surface that prevents rotation of each connection terminal.
The characteristic fixing structure of the connection terminal .

According to the fixing structure of the connection terminal having the above structure,
A nut was fixed to a part of electric equipment such as an electric junction box or a fusible link box, and the fuse terminal of the fusible link was positioned along the screwing surface of the nut, and was further connected to a bus bar or electric wire. The connection terminals etc. are positioned. Since a guide portion having a U-shaped cross section is formed in the electric device so as to communicate with the fixing position of the nut, the bolt is held by a tool such as a wrench when fixing the connection terminal. It is possible to move along the guide portion to the fixing position of the nut, and tighten and fix the nut together with the connection terminal. Therefore, even if the distance to the tightening position of the bolt is long, since it is guided by the guide portion, it is not necessary to search for the tightening position, and the fixing work can be efficiently performed. Further, even if the bolt is dropped from the tool, it will stay in the guide portion, and it will not be necessary to search for the bolt. In addition, even if the tool becomes long, there is no rotational shake when tightening, and the fixing can be performed accurately and easily.

Further, the insertion port for inserting the connection terminal into the fixed position of the nut is provided with a locking portion for temporarily locking the connection terminal in a predetermined position. Therefore, the positioning of the connection terminal is accurately performed and the tightening error is eliminated. Further, the insertion port is formed with a side surface for preventing rotation of the crimp terminal due to torque when the bolt is rotated. Therefore, even if the bolt is rotated at the time of fastening and fixing, the electric wire connected to the connection terminal is not pulled or entangled. Further, the work of sandwiching the connection terminals to prevent them from rotating is not necessary.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a fixing structure for a connection terminal (hereinafter, simply referred to as a fixing structure) to which the present invention is applied will be described in detail with reference to FIGS. FIG. 1 is a perspective view showing the configuration of an electric connection box to which a fixing structure is applied, FIG. 2 is a partially cutaway perspective view showing the internal configuration of the electric connection box and the relationship of each member, and FIG. 3 is each member to the electric connection box. 4 is a partially cutaway perspective view showing the assembling process of FIG. 4, FIG. 4 is an enlarged perspective view of an essential part showing the assembly of the crimp terminal, FIG. 5 is a sectional view of the essential part showing the assembly of each connection terminal, and FIG. FIG. 7 is a partially cutaway perspective view showing the positional relationship of the terminals, FIG. 7 is an enlarged perspective view of an essential part showing the locking of the crimp terminal, FIG. 8 is a sectional view of the essential part showing the locking of the crimp terminal, and FIG. 9 is each connection. 11 is a partially cutaway perspective view showing the fixing action of the terminal, FIG. 10 is a partially cutaway perspective view showing the bolt tightening of each connection terminal, FIG.
Is a side view of the main part showing the guide action when tightening the bolt, FIG.
2 is a partially cutaway perspective view showing a fixed state of each connection terminal, FIG.
FIG. 3 is a cross-sectional view of a main part showing a rotation preventing action of the connection terminal. In the description of the embodiments, first, the configuration of the electric junction box to which the fixing structure is applied will be described, and then the fixing action of members such as connection terminals will be described. Further, the electric junction box corresponds to the electric device referred to in the present invention, but the fusible link box described in the conventional example also corresponds to the electric device.

The fixed structure 1 in the present embodiment is applied to an electric junction box 2 mounted on an automobile. A fusible link holder (hereinafter, simply referred to as a holder) 3 is provided on an upper surface of the electrical junction box 2, and a fusible link (hereinafter, simply referred to as an F / L) 4 is detachably attached to the holder 3. It is supposed to be installed. F
/ L4 is a pair of fuse terminals 4a,
4b, and fuse terminals 4a, 4 in the F / L4
A fuse element (not shown) is formed between b.

On the other hand, the connection terminals 6a, 6b connected to the electric wires 5a, 5b are inserted into the lower side surface of the electric junction box 2. The connection terminal 6a is fixed to the fuse terminal 4a with a bolt 8a together with the bus bar 7 provided in the electric connection box 2. Also, the crimp terminal 6b
Is fixed to the fuse terminal 4b by a bolt 8b. When fixing each connection terminal, that is, the connection terminal 6a and the bus bar 7 with respect to the fuse terminal 4a with the bolts 8a and 8b, and with the connection terminal 6b with respect to the fuse terminal 4b, an impact wrench (hereinafter, referred to as The bolts 8a and 8b are held by the wrench 9 and screwed onto the nuts 11a and 11b. At this time, in order to guide the wrench 9 to the screwing position and to prevent the bolts 8a and 8b from falling off, guide portions 12a and 12b are formed toward the tightening position. In this embodiment, the guide portion 12a,
12b is formed so as to correspond to one fusible link holder 3, but the present invention is not limited to this, and the forming position and the number can be changed as necessary.

Next, the structure for inserting the connection terminals 6a and 6b will be described. The connection terminals 6a and 6b are inserted into the insertion ports 16a and 16b communicating with the guide portions 12a and 12b from the opening 15 formed in the lower portion of the electric connection box 2 as shown by arrows A1 and A2 in FIG. Has become. First, the structure of the insertion port 16a will be described. As shown in FIGS. 3 to 5, the insertion port 16a is formed from the opening 15 formed in the lower portion of the electrical junction box 2 to the guide portion 1.
It is formed so as to communicate with 2a. A tapered guide surface 17a is formed on a side surface of the insertion port 16a, that is, a side surface facing the bus bar 7, and a stepped locking portion 17b is formed on an upper portion of the guide surface 17a.

Referring to the lateral shape of the insertion port 16a, the side surface 18 is formed on the side wall surface as shown in FIG. 4, and the width dimension thereof is set so that the crimp terminal 6a can be easily inserted. . Further, with respect to the insertion port 16b, no guide surface or step is formed as shown in FIG. 5, and the crimp terminal 6b is directly inserted in the vicinity of the fuse terminal 4b of the F / L 4.

As shown in FIG. 5, a partition plate 19 is formed in the lower central portion of the holder 3, and nut embedding portions 21a and 21b are formed on both sides thereof. Then, the nut 11a (see FIG. 2) is fixed by being embedded in the nut embedding portion 21a.
A nut 11b is embedded and fixed to b. Therefore, the nuts 11a and 11b are insulated by the partition plate 19 and cannot rotate when tightened by the bolts 8a and 8b, so that the connection terminals can be tightened and fixed easily and reliably.

Next, the assembling of each member to the electric junction box 2 and the fixing action of the terminals will be described. As shown in FIGS. 2 to 4, the F / L 4 is inserted into the holder 3 from above the holder 3. The fuse terminal 4a of the F / L 4 is positioned along the threaded surface of the nut 11a, and the fuse terminal 4b is positioned along the threaded surface of the nut 11b. As shown in FIG. 2, the fuse terminals 4a, 4b
U-shaped notches 22a and 22b are formed in the
4 is attached to the holder 3, the notches 22a, 22
b comes into communication with the screw holes of the nuts 11a and 11b. In particular, on the fuse terminal 4a side, the insertion hole 7a of the bus bar 7 provided in advance also communicates with the cutout 22a and the screw hole of the nut 11a.

Next, the work of fixing the connection terminals 6a and 6b will be described. First, the connection terminal 6a is indicated by an arrow A1 in FIG.
As shown by, it is inserted into the insertion port 16a from the opening 15. That is, as shown in FIG.
Although it is gradually inserted into a, the connecting portion 23a of the connecting terminal 6a is initially inserted, and the large-diameter bulk 24 to which the electric wire 5 is clamped and fixed is inserted into the insertion port 1 as shown in FIG.
It hangs on the lower end of 6a.

When further inserted from this state, the bulk 24
Touches the tapered surface 17a, so that the entire connection terminal 6a moves upward while elastically abutting the opposing bus bar 7. Then, as shown in FIGS. 6 to 8, when the lower end of the bulk 24 is hooked on the locking portion 17b, the bulk 24 is locked. At this time, it can be recognized by clicking that the connection terminal 6a is properly inserted, and furthermore, the connection terminal 6a is temporarily held, so that the connection terminal 6a can be prevented from falling off.

On the other hand, the connection terminal 6b is inserted from the opening 15 into the insertion port 16b as shown by an arrow A2 in FIG. Then, the F / L 4 previously mounted is positioned at a position along the fuse terminal 4b. Since the width of the insertion port 16b is set to be the same as that of the insertion port 16a, the connection portion 23b of the connection terminal 6b is positioned along the fuse terminal 4b. Therefore, as shown in FIG. 9, both the connection terminals 6a and 6b are positioned along the fuse terminals 4a and 4b, and then the bolt 8
A fixing operation by a and 8b, that is, a tightening operation is started.

As shown in FIG. 2, the wrench 9 is provided with bolt holding portions 25a and 25b at its ends. When performing the fixing work, as shown in FIG.
Bolts 8a and 8b are fitted and held on 5a and 25b.
Next, as shown by arrows B1 and B2 in FIG.
The nuts 11a and 11b are moved close to the nuts 11a and 11b along the lines 2a and 12b, and the wrench 9 is rotated to screw the bolts 8a and 8b into the nuts 11a and 11b as shown in FIG.

Guide portions 12a, 12b in the above process
The relationship between the wrench 9 and the wrench 9 will be further described with respect to the guide portion 12a. As shown in FIG. 11, the inner diameter R1 of the guide portion 12a
Is dimensioned according to the diameter R2 of the wrench 9, and a gap G is provided between the two. Therefore, the wrench 9 slides along the guide portion 12a, and
The bolt 8a can reach the nut 11a as shown in FIG. Even if the bolt 8a might fall off from the wrench 9 during tightening work, the guide portion 12
Since it is received on a, the bolt 8a does not drop from the electric junction box 2. Therefore, in the present embodiment, the bolts 8a, 8b and the nuts 11a, 11b can be aligned without visual inspection, and the bolts 8
It is possible to reliably prevent the inconvenience that the a and 8b fall out of the wrench 9 and fall into the engine room, for example. That is, it is possible to improve workability when fixing the connection terminal and prevent accidents due to the falling of the bolts 8a and 8b.

As described above, the bolts 8a and 8b and the nut 1
After tightening the screws 1a and 11b, attach the wrench 9 to the bolt 8
Remove from a and 8b. As a result, as shown in FIG. 12, the fuse terminal 4a, the bus bar 7 and the connection terminal 6a are
And will be fixed and will be electrically connected. Also,
Similarly, the fuse terminal 4b and the connection terminal 6b are also fixed and electrically connected, and the assembly of the electrical connection box 2 is completed. By the way, conventionally, when tightening the screws with the bolts 8a and 8b, the connection terminals 6a and 6b are normally rotated in the screw tightening direction. Therefore, in order to prevent this rotation, the connection terminals 6a and 6b are pinched with pliers or the like to perform the screw tightening work. Cage, connection terminal 6a,
It was necessary to rotate the wrench 9 while pressing 6b, but in the present embodiment, the complicated work as described above becomes unnecessary.

That is, referring to the insertion port 16a as shown in FIG. 13, side surfaces 18 are formed on both sides in the lateral direction. Therefore, when tightening the bolt 8a, even if the connection terminal 6a rotates, the left side surface 1
It comes into contact with 8 and cannot rotate. When the bolt 8a is loosened, the connection terminal 6a comes into contact with the right side surface 18 so that the connection terminal 6a cannot rotate. Therefore, it is not necessary to hold down the connection terminal 6a when performing the screw tightening work, and the screw tightening work can be easily performed with one hand. Furthermore, the twisting of the electric wire 5a due to the rotation of the connection terminal 6a does not occur.

By the way, the lengths of the guide portions 12a and 12b are set according to the size of the electric junction box 2 and the position of the holder 3 in the present embodiment. Is effective. Further, since the inner diameters of the guide portions 12a and 12b are set according to the size of the tool, that is, the wrench 9, as described above, it is possible to prevent erroneous selection such as mistaken wrench 9.

[0026]

As described above, in the structure for fixing the connection terminal according to the present invention, the fuse provided on the upper surface of the electric device is used.
And the fusible link holder
Each nut embedded on both sides of the lower center partition of the ruder
Each nut installed in the fitting part and the fusible reel
When attaching the fusible link to the holder
Each of the nuts that can be slidably contacted with the threaded surface of each nut
From the fuse terminal and the lower opening of the electrical device,
Each connection terminal to be inserted along the fuse terminal,
Each of the nuts from at least one of the left and right ends of the electric device
At least one of the threads is connected to the threaded surface and communicates with the opening.
And each guide part that extends so that
Insert the part toward the screwing surface of each nut of each bolt
And guide the screwing operation. Therefore, even if the distance to the tightening position of the bolt is long, it is guided by the guide portion, so that it is not necessary to search for the tightening position, and the work of fixing each connection terminal can be performed efficiently. Further, even if the bolt comes off from the tool, it will stay in the guide portion, and it will not be necessary to search for the bolt and the like, and it will be possible to prevent the bolt from coming off from the electric device. Further, even if the tool becomes long, there is no rotational shake when tightening, and bolts can be tightened accurately and easily.

In addition, the hooks that slidably contact the screwing surface of each nut
Insert the adjacent connection terminal with the bus bar
The inlet temporarily locks the bulk of each connection terminal at one end.
It has a locking part. In addition, the insertion port is
Equipped with side faces that prevent rotation of each connection terminal when tightening
Since the connection terminal is accurately positioned and tightened
There are no mistakes . Therefore, even if the bolt is rotated during tightening and fixing, the electric wire connected to the connection terminal will not be drawn or entangled, and work such as pinching to prevent rotation of the connection terminal is unnecessary. Become.

[Brief description of drawings]

FIG. 1 is a perspective view of an electric connection box showing an embodiment of a fixing structure of a connection terminal to which the present invention is applied.

FIG. 2 is an exploded perspective view showing the relation of each member constituting the electric junction box in FIG.

FIG. 3 is a partially cutaway perspective view showing the configuration of the electric junction box and insertion of connection terminals in FIG.

FIG. 4 is an enlarged perspective view of an essential part showing insertion of a connection terminal in FIG.

5 is a cross-sectional view of an essential part showing insertion of a connection terminal in FIG.

FIG. 6 is a perspective view showing locking of the connection terminal in FIG.

FIG. 7 is an enlarged perspective view of a main part showing insertion of a connection terminal in FIG.

FIG. 8 is a cross-sectional view of a main part showing locking of the connection terminal in FIG.

9 is a perspective view showing a guide action of the bolt in FIG.

FIG. 10 is a perspective view showing the tightening action of the bolt in FIG.

11 is a side view of a main portion showing the relationship between the guide portion and the tool in FIG.

12 is a perspective view showing a connection completed state of the connection terminal in FIG.

13 is a cross-sectional view of a main part showing a rotation preventing action of the connection terminal in FIG.

FIG. 14 is an exploded perspective view showing a configuration of a conventional fusible link.

[Explanation of symbols]

1 Fixed structure of connection terminal 2 electrical junction boxes 3 fusible link holder 4 fusible link 4a, 4b fuse terminals 5a, 5b electric wire 6a, 6b connection terminal 7 bus bars 8a, 8b bolt 9 Impact wrench 11a, 11b nuts 12a, 12b guide part 15 openings 16a, 16b insertion port 17a Tapered surface 17b Locking part 21a, 21b Nut embedded part 24 bulk

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-192601 (JP, A) Actual flat 2-33519 (JP, U) Actual flat 5-33444 (JP, U) Actual flat 4- 61728 (JP, U) Actual development 3-104956 (JP, U) Actual development 6-58565 (JP, U) Actual development Sho 59-5762 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01R 4/38 H02G 3/16

Claims (3)

(57) [Claims] 1. A fusible relay provided on an upper surface of an electric device.
Link holder and below the fusible link holder
In each nut embedding part arranged on both sides of the center partition plate
Each nut to be mounted and the fusible link holder
When mounting the fusible link to the
End of each fuse that can slidably contact the screwing surface with each bolt in
The fuse terminal from the lower opening of the child
Each connection terminal to be inserted along with the electric device
At least one of the left and right ends of each nut
Also facing one screwing surface and communicating with the opening
Each of the guide portions to be stretched,
Inserting and screwing each bolt toward the screwing surface of each nut
A fixed structure for connecting terminals, which guides the operation . 2. The hinges that are in sliding contact with the threaded surfaces of the nuts.
The connection end adjacent to the fuse terminal with a bus bar interposed
The outlet of the child is the bulk of each connection terminal at one end.
A contractor characterized by comprising a locking portion for temporarily locking the
The fixing structure for a connection terminal according to claim 1 . 3. The insertion port is for tightening each of the bolts.
And a side surface for preventing the rotation of each of the connection terminals at the time of
Fixing the connection terminal according to claim 2, characterized in that
Structure .