JP3311643B2 - Busbar locking 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 bus bar locking structure in which two vertical bus bars are held and fixed by locking means.

[0002]

2. Description of the Related Art FIG.
0 (a) and (b) and those shown in FIGS. 11 (a) and 11 (b). FIGS. 10A and 10B show a locking structure of one vertical bus bar used in an electric junction box mounted on a vehicle.
FIGS. 11 (a) and 11 (b) show two components used in the electric junction box.
3 shows a locking structure for two vertical bus bars. The locking structure of these bus bars is formed by engaging holes 2 formed in each of the vertical bus bars 1, 1 '.
Then, the lock portion 4 of the synthetic resin flexible locking piece 3 integrally formed on the bottom side of the main case of the electric connection box is inserted and engaged, and each vertical bus bar 1, 1 'is connected to the main case. It is designed to be locked at a predetermined position on the bottom side.

FIGS. 12 (a) and 12 (b) show a fusible link 5 having a large current capacity of a bolt connection type in which the above-mentioned two vertical bus bars 1, 1 'are wired in parallel. Two vertical bus bars 1, 1 'are fastened and fixed to one leg 6 of the fusible link 5 via bolts 7 and nuts 8.
Power is distributed and supplied from the fusible link 5 to each of the vertical bus bars 1, 1 '. Incidentally, the similar structure of the bus bar locking structure is disclosed in Hatsumei Kyokai Disclosure Report 95-3.
No. 210 and JP-A-8-185921.

[0004]

However, in the locking structure of the two vertical bus bars 1, 1 'bolted to the conventional fusible link 5, for example, the bent portion 1a of one of the vertical bus bars 1 is bolted. If it is located far from the fastening portion between the nut 7 and the nut 8, a large number of bus bar locking structures as shown in FIGS. 11 (a) and 11 (b) are required, which increases the cost, and also increases the bus bar mounting. The number of control items at the time increased, and the mounting workability was poor.

Therefore, the present invention has been made to solve the above-mentioned problem, and the number of locking means for locking two vertical bus bars can be reduced as much as possible. An object of the present invention is to provide a bus bar locking structure that can reduce the number of management items.

[0006]

[0007]

[0008]

Means for Solving the Problems The invention of claim 1 has two aspects.
Of one of the vertical busbars
A locking portion to be locked at a predetermined position of the subbar;
The vertical busbars are overlapped with each other and
Locking structure smell of bus bars which is adapted to lifting fixed Te, the bent portion as the engagement portion bent to form the upper end of the other vertical bus bar on the upper end portion of the one longitudinal bus bar,
The two vertical bus bars are overlapped with each other, and the bent portions of one of the vertical bus bars are locked at the upper end of the other vertical bus bar, and the two vertical bus bars are clamped between the pair of clamping pieces of the locking means. In addition, the engaging portion formed on the other vertical bus bar can be freely locked to the flexible locking portion of the locking means.

In this bus bar locking structure, since the bent portion of one vertical bus bar is locked to the upper end of the other vertical bus bar, the other vertical bus bar is engaged by the flexible locking portion of the locking means. Both vertical busbars are securely locked between the pair of holding pieces of the locking means only by locking to the joint. Further, since only the engaging portion of the other vertical bus bar needs to be locked to the flexible locking portion of the locking means, the locking shape of the locking means with respect to the vertical bus bar is simplified. Is achieved.

According to a second aspect of the present invention, two vertical bus bars are provided.
One of the vertical busbars has the same position as the other vertical busbar.
The two vertical busbars are connected to each other.
So that they are overlapped and held and fixed by the locking means.
The Te locking structure odor bus bar to form a recess having a protruding portion as the engaging portion on the one longitudinal bus bar,
A recess having a protrusion fitted into the recess is formed in the other vertical bus bar facing the recess, and the two vertical bus bars are overlapped with each other to form a protrusion of the other vertical bus bar in the recess of one vertical bus bar. In the fitted state, the two vertical bus bars are clamped between the pair of clamping pieces of the locking means, and the recess of the other vertical bus bar can be locked to the flexible locking portion of the locking means. It is characterized by the following.

In this bus bar locking structure, the concave portion of one vertical bus bar is locked to the projecting portion of the other vertical bus bar, so that the concave portion of the other vertical bus bar is locked by the flexible locking portion of the locking means. The two vertical bus bars are securely locked between the pair of holding pieces of the locking means only by the locking of. In addition, since only the concave portion of the other vertical bus bar needs to be locked to the flexible locking portion of the locking means, the locking shape of the locking means with respect to the vertical bus bar is simplified, and the cost is reduced in this respect as well. It is planned.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view showing a bus bar locking structure according to an embodiment of the present invention. FIG. 2 is a plan view of a main case of a vehicle-mounted electric connection box to which the bus bar locking structure is applied. 3 is an enlarged bottom view of the main part of the main case viewed from the back side, FIG. 4 is a bottom view of the locking means protruding from the back of the main case, FIG. 5 is a cross-sectional view taken along line AA in FIG. FIG. 6 is a cross-sectional view along the line BB in FIG. 4, and FIG. 7 is a cross-sectional view showing a state in which two vertical bus bars are locked by locking means.

As shown in FIG. 2, one of the four corners of a box-shaped main case 10 made of synthetic resin having a fully open lower surface side of the electric connection box is provided with a bolt-connected fusible having a large current capacity. The link 11 is mounted. As shown in FIG. 3, a pair of legs 12, 12 of a fusible link 11 is provided.
Protrudes toward the back surface (bottom surface) 10a of the main case 10, and two vertical bus bars 13, 13 'are fastened and fixed to one leg 12 via bolts and nuts (not shown). The overlapped portion of the two vertical busbars 13 and 13 ′ is locked (locked) by locking means 20, and the other portion is bent at a predetermined position and routed at a predetermined position on the back surface 10 a of the main case 10. I have.

As shown in FIGS. 1 and 7, a bent portion 14 as an engaging portion is provided at an upper end portion 13a of one of the two vertical bus bars 13, 13 '. 13 is bent about 45 ° on the upper end 13b side. A substantially semicircular engaging hole (engaging portion) 15 is formed at the center of the other vertical bus bar 13.

As shown in FIGS. 1, 3 to 7, locking means 20 for holding and fixing the overlapped portions of the two vertical bus bars 13, 13 'are integrally protruded below the back surface 10a of the main case 10. It is formed. That is, the locking means 20
Are integrally formed on a back surface 10a of the main case 10 and a rib 10b protruding downward from the back surface 10a, so that the bent portion 14 of one vertical bus bar 13 'is connected to the other vertical bus bar 1'.
3 in a state of being locked to the upper end 13b.
A pair of front and rear left and right holding pieces 21 and 22 for holding the overlapped portions 3 and 13 'and a pair of slits 2 between a pair of right and left holding pieces 22 and 22 opposite the rib 10b.
And a flexible locking portion 24 which is integrally formed to protrude through the third and third 23 and is locked by the engaging hole 15 of the other vertical bus bar 13. Tapered surfaces 21a and 22a are formed at opposing positions below the pair of holding pieces 21 and 22, respectively. Each of the tapered surfaces 21a and 22a is formed by a slit (fitting portion) formed between each pair of holding pieces 21 and 22.
It is connected to 25. As shown in FIG.
Is substantially equal to the thickness of the overlapped vertical bus bars 13 and 13 ′, and the upper end surface of the slit 25 is folded by the one vertical bus bar 13 ′ locked to the upper end 13 b of the other vertical bus bar 13. The tip of the curved portion 14 comes into contact. At this time, the lock claw 24a of the flexible locking portion 24 of the locking means 20 is locked in the engagement hole 15 of the other vertical bus bar 13. Note that reference numeral 26 in FIGS.
Indicates a punched hole.

According to the bus bar locking structure of the above embodiment, as shown in FIG. 1, two vertical bus bars 13, 13 '.
When the overlapped portion is inserted and locked between the pair of holding pieces 21 and 22 of the locking means 20, the bent portion 14 of one vertical bus bar 13 'is connected to the upper end 13 of the other vertical bus bar 13.
Insert with the lock on b. In this insertion process, the bent portion 14 of the one vertical bus bar 13 'is smoothly guided into the slit 25 by the tapered surfaces 21a, 22a of the pair of holding pieces 21, 22. Then, as shown in FIG. 7, when the bent portion 14 of one vertical bus bar 13 ′ is inserted until it hits the upper end surface of the slit 25, the engaging hole 15 of the other vertical bus bar 13 is engaged with the locking means 20. The flexible locking portion 24 is locked by the lock claw 24a.

As shown in FIG. 7, two vertical bus bars 1
When the overlapped portion of the vertical bus bar 13 'is inserted and locked between the pair of holding pieces 21 and 22 of the locking means 20, the bent portion 14 of one vertical bus bar 13' is
3 is locked to the upper end 13b of the vertical bus bar 13 only by the locking claw 24a of the flexible locking portion 24 of the locking means 20 in the engagement hole 15 of the other vertical bus bar 13.
13 'is securely locked between the pair of holding pieces 21 and 22 of the locking means 20. Thereby, one locking means 20
As a result, one of the vertical bus bars 13 'can be locked so as not to come out downward, and the two vertical bus bars 13, 13' can be locked.
Even when the overlapped portion is long, the two vertical bus bars 13, 13 'can be reliably locked by the small number of locking means 20. As a result, the number of management items at the time of attaching the bus bar can be reduced, and the cost can be reduced.

The engagement hole 15 of the other vertical bus bar 13
Is locked to the lock claw 24a of the flexible locking portion 24 of the locking means 20, and the one vertical bus bar 13 'is also connected to the locking claw 24a of the flexible locking portion 24 via the bent portion 14. Since it is indirectly locked, one of the conventional vertical bus bars 13 'is used.
Locking mechanism for locking only
The simplification of the shape of the flexible locking portion 24 and the cost reduction can be further achieved.

FIG. 8 is a perspective view, partially in section, showing a bus bar locking structure according to another embodiment of the present invention, and FIG. 9 is a diagram showing two vertical bus bars 16 formed by locking means 20 used in the bus bar locking structure. , 16 'are locked.

As shown in FIGS. 8 and 9, at the center of one of the two vertical bus bars 16 and 16 ', there is provided a projecting portion 17a having a flat plate-like section as an engaging portion. The recess 17 is formed by press working or the like. In the center of the other vertical bus bar 16 facing the concave portion 17, a concave portion 18 having a flat plate-shaped protruding portion 18a fitted into the concave portion 17 is formed by press working or the like.

As shown in FIG. 9, two vertical bus bars 1
6 and 16 ′, the recess 17 of one vertical bus bar 16 ′ is formed by the projection 18 of the other vertical bus bar 16.
a. In this state, the two vertical bus bars 16 and 16 ′ are each
1 and 22, and the concave portion 18 of the other vertical bus bar 16 is engaged with the locking claw 24 of the flexible locking portion 24 of the locking means 20.
a. It should be noted that the width of the slit 25 of the locking means 20 is one of the overlapped vertical busbars 1.
Since the thickness from the projection 17a of the 6 'to the other vertical bus bar 16 is substantially equal, and the other configuration is the same as that of the above-described embodiment, the same components are denoted by the same reference numerals and detailed description is given. Description is omitted.

According to the bus bar locking structure of the other embodiment, the recess 17 of one vertical bus bar 16 'is locked to the projection 18a of the other vertical bus bar 16; Lock claw 24a of the flexible locking portion 24
The two vertical bus bars 16 and 16 ′ are securely locked between the pair of holding pieces 21 and 22 of the locking means 20 only by locking the other vertical bus bar 16 into the concave portion 18 by the above. As a result, one of the vertical bus bars 16 ′ is operated by one locking means 20.
Can be locked so as not to come out downward, and even when the overlapped portion of the two vertical bus bars 16 and 16 ′ is long, the two vertical bus bars 1 can be locked by a small number of locking means 20.
6, 16 'can be securely locked. as a result,
The management items at the time of attaching the bus bar can be reduced, and the cost can be reduced.

When the concave portion 18 of the other vertical bus bar 16 is locked to the lock claw 24a of the flexible locking portion 24 of the locking means 20, the one vertical bus bar 16 'can also be moved through the concave portion 17. Since the locking member 24 is indirectly locked to the locking claw 24a of the flexible locking portion 24, a locking mechanism for locking only one of the vertical bus bars 16 'as in the related art is not required, and the flexibility of the locking means 20 is eliminated. It is possible to further simplify the shape of the sex locking portion 24 and reduce the cost.

According to the above embodiments, the locking structure of the two vertical bus bars arranged in parallel on the legs of the fusible link of the electric junction box has been described. It goes without saying that each of the above embodiments can be applied to the locking structure of the vertical bus bar used for the component.

[0026]

[0027]

As described above , according to the first aspect of the present invention, the upper end of one vertical bus bar is connected to the other vertical bus bar.
Provided with a bent part as a locking part that is locked to the upper end of the
With this, two superimposed vertical busbars can be
It can be securely locked by the locking means. to this
The number of locking means and the control items when the busbar is attached
And the cost of the entire structure can be reduced accordingly.
be able to. In particular, since only the engaging portion of the other vertical bus bar needs to be locked to the flexible locking portion of the locking means, the locking shape of the locking means with respect to the vertical bus bar can be simplified. Also, the cost of the entire structure can be reduced.

According to the invention of claim 2 , one of the vertical bus bars
The other vertical bus bar
With a recess having a projection as a locking part
The two vertical busbars superimposed on each other
The locking means can be securely locked. This
Reduces the number of locking means and management items when installing busbars
The cost of the entire structure can be reduced accordingly.
Can be. In particular, since only the concave portion of the other vertical bus bar needs to be locked to the flexible locking portion of the locking means, the locking shape of the locking means with respect to the vertical bus bar can be simplified. The overall cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a bus bar locking structure according to an embodiment of the present invention in a partial cross section.

FIG. 2 is a plan view of a main case of the electric junction box to which the busbar locking structure is applied.

FIG. 3 is an enlarged bottom view of a main part of the main case of the electric connection box as viewed from the back side.

FIG. 4 is a bottom view of the locking means integrally formed on the back surface of the main case of the electric connection box.

FIG. 5 is a sectional view taken along line AA in FIG. 4;

FIG. 6 is a sectional view taken along line BB in FIG. 4;

FIG. 7 is a sectional view showing a state in which two vertical bus bars are locked by the locking means.

FIG. 8 is a perspective view showing a bus bar locking structure according to another embodiment of the present invention in a partial cross section.

FIG. 9 is a cross-sectional view showing a state in which two vertical bus bars are locked by locking means used in the bus bar locking structure of the other embodiment.

FIG. 10A is a bottom view showing a state in which one vertical bus bar of the conventional example is locked by locking means, and FIG.
It is sectional drawing which follows the middle XX line.

FIG. 11A is a bottom view showing a state in which two vertical bus bars of a conventional example are locked by locking means, and FIG. 11B is a bottom view of FIG.
It is sectional drawing which follows the middle YY line.

FIG. 12A is a front view showing a state in which a fusible link is fixed to two vertical bus bars of a conventional example by bolts and nuts, and FIG. 12B is a front view showing a state in which a fusible link is bolted to two vertical bus bars of the conventional example. It is a bottom view which shows the state which fixed the nut.

[Explanation of symbols]

 13 'One vertical bus bar 13a Upper end portion 13 The other vertical bus bar 13b Upper end 14 Bent portion (locking portion) 15 Engagement hole (engaging portion) 16' One vertical bus bar 16 The other vertical bus bar 17 Recess 17a Projecting portion 18 Concave portion 18a Projecting portion 20 Locking means 21, 22 A pair of clamping pieces 24 Flexible locking portion

Claims (2)

(57) [Claims] 1. A vertical bus of one of two vertical bus bars.
The bar is locked to a predetermined position of the other vertical bus bar.
The parts provided, before superposing the 2 Tsunotate busbar between
In the locking structure of the bus bar which is adapted to hold fixed by serial locking means, folding as the locking portion at an upper end portion of the one longitudinal bus bar
A bent portion is formed by bending the upper end of the other vertical bus bar.
The two vertical busbars overlap each other and
The bent part of the subbar was locked to the upper end of the other vertical busbar
In this state, the two vertical bus bars are held by a pair of holding pieces of the locking means.
Formed between the other vertical busbars.
A bus bar locking structure, characterized in that the engaging portion is freely lockable to a flexible locking portion of the locking means . 2. A vertical bus of one of two vertical bus bars.
The bar is locked to a predetermined position of the other vertical bus bar.
The two vertical busbars are overlapped with each other
Te hitch structure odor bus bars which is adapted to hold and fix the Kigakaritome means have a protruding portion as the engaging portion on the one longitudinal bus bar
Formed in the recess, and the other vertical bush opposed to the recess is formed.
A recess having a projection fitted into the recess is formed on the stub.
The two vertical busbars are overlapped with each other and
Fit the protrusion of the other vertical busbar into the recess of the busbar.
In a state in which the two vertical bus bars are held, a pair of holding pieces of the locking means are provided.
A bus bar locking structure characterized in that the bushing is held between the portions and the recess of the other vertical bus bar is freely lockable with a flexible locking portion of the locking means.