JPH0631327U - Mounting structure for automobile electrical junction box - Google Patents

Abstract

(57) [Abstract] [Purpose] When a vehicle collides, the electrical connection box inside the instrument panel is prevented from breaking through the instrument panel and protruding into the vehicle interior. [Structure] An electric connection box is arranged inside the instrument panel, and a front end mounting bracket of the electric connection box is screwed and fixed to a dash panel that separates an engine room and a vehicle room in the front of the vehicle. In the mounting structure of the electric connection box for automobiles, wherein the rear end mounting bracket of the electric connection box is fixed to the structural member by screwing, at least one of the front end mounting bracket and the rear end mounting bracket is impacted from the dash panel side. Thus, the hole 12 is provided as a support canceling portion that positively cuts off the support by the screw fixing. The hole 12 is formed continuously with the screw insertion hole, and the nut 15 for tightening and fixing the mounting bracket is pulled out from the hole 12 by moving the screw into the hole 12 when an impact is applied.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mounting structure for an electric connection box for a vehicle, which is arranged inside an instrument panel.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, an electric connection box for an automobile disposed inside an instrument panel is integrally attached to a front end and a rear end of a main body 1 of an electric connection box H with mounting brackets 2, 3 as shown in FIGS. The front end mounting bracket 2 is screwed and fixed to a dash panel 6 that divides the engine room 4 and the vehicle compartment 5 at the front of the vehicle, and the rear end mounting bracket 3 is attached to the lean hose inside the instrument panel 7. It is attached to the ment 8 by fixing it with screws so that it does not fall downward (Japanese Patent Laid-Open No. 114318/1989).

[0003]

[Problems to be solved by the device]

 By the way, when a vehicle collides head-on, an impact force in the direction of arrow A in FIG. 11 is applied to the vehicle. However, in the conventional structure, even if an impact is applied, the screwing fixing portion of the electric junction box H is supported. There is a risk that the electric connection box H may protrude into the vehicle compartment 5 due to an impact while the electric junction box H is fixed at both ends.

In view of the above circumstances, the present invention has an object to provide a mounting structure of an electric connection box for an automobile, in which the electric connection box does not project to the inside of the vehicle when a shock is applied to the automobile from the front. And

[0005]

[Means for Solving the Problems]

 According to the present invention, an electric connection box is disposed inside the instrument panel, and a front end mounting bracket of the electric connection box is fixed to a dash panel that separates the engine room and the vehicle compartment in the front of the vehicle. In a vehicle electrical junction box mounting structure in which the rear end mounting bracket of the electrical junction box is fixed to the structural member, secure it to at least one of the front end mounting bracket and rear end mounting bracket by impact from the dash panel side. It is characterized by the provision of a support cancellation section that actively cuts off support by

[0006]

[Action]

 According to the mounting structure of the electrical junction box configured as described above, when the vehicle collides head-on and a shock is applied from the dash panel side, the support canceling unit cuts off the support by fixing. Therefore, it is possible to prevent the unsupported electrical junction box from dropping downward and piercing the instrument panel with both ends fixed and protruding into the vehicle compartment.

[0007]

【Example】

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

First Embodiment First, a first embodiment of the present invention will be described with reference to FIGS.

In the electrical junction box mounting structure of the first embodiment, the mounting brackets at the front and rear ends of the electrical junction box are configured as shown in FIGS. 1 and 2.

That is, the mounting bracket 10 has an elongated hole-shaped hole (support eliminating portion) 12 that communicates with the screw insertion hole 11 of the fixing screw. The hole 12 is continuously formed on the body side (right side in the figure) of the electric connection box through the neck portion 13, and is sized so that the nut 15 screwed into the fixing screw 14 can be removed. . That is, the inner surface width m and the length n are formed to be sufficiently larger than the nut 15, so that the nut 15 can be easily removed.

The neck portion 13 is a portion having a width narrower than the inner diameter of the screw insertion hole 11 and is smoothly continuous with the inner surfaces of the screw insertion hole 11 and the extraction hole 12. Notches 16 are provided on both outer sides of the neck portion 13 in the width direction to promote flexural deformation of the neck portion 13.

The mounting bracket 10 is provided with a recessed portion 17 that is thinned out, leaving the outer peripheral edge portion and the continuous contour edge of the screw insertion hole 11, the neck portion 13 and the punched hole 12. . A metal collar 18 is fitted into the screw insertion hole 11 if necessary.

In the electrical junction box having the mounting bracket 10 having such a configuration, the front end is fixed to the dash panel using a screw and a nut, and the rear end is a lean hose joint (see FIG. 11) as in the conventional case. It is fixed to and attached so that it does not fall off. In this state, the screw 14 is inserted into the screw insertion hole 11, and the mounting bracket 10 is firmly supported by the mating member (dash panel side bracket or lean hose) by the tightening force of the nut 15.

Next, the operation when a shock is applied to the vehicle from the dash panel side will be described with reference to FIG.

When a shock is applied from the dash panel side, the screw 14 is disengaged from the screw insertion hole 11 due to the shock force, passes through while expanding the neck portion 13, and moves into the hole 12. Then, when the screw 14 moves into the hole 12, the nut 15 is pulled out from the hole 12, the support of the mounting bracket 10 by the screw 14 and the nut 15 is cut, and the electrical junction box H falls. Therefore, the electric junction box H does not remain in a fixed position at both ends as in the conventional case, and the electric junction box H does not break through the instrument panel and project into the vehicle interior.

Second Embodiment Next, a second embodiment of the present invention will be described.

In the electric junction box mounting structure of the second embodiment, the mounting brackets at the front and rear ends of the electric junction box are configured as shown in FIGS. 4 and 5.

That is, the mounting bracket 20 has a weak portion (support eliminating portion) 22 at a portion closer to the electric junction box body side (right side in the drawing) than the insertion hole 21 of the fixing screw. The weak portion 22 is formed by a concave portion 24 having a V notch 23 so as to crack and break when an impact is applied. A plurality of recesses 24 having the V notches 23 are formed alternately on the front surface side and the back surface side of the mounting bracket 20.

The electrical junction box having the mounting bracket 20 having such a configuration has a front end fixed to the dash panel and a rear end fixed to the lean hose, using a screw and a nut, as in the conventional case, and is removed. It is installed not to.

When an impact is applied from the dash panel side, the impact force causes a crack K to enter from the V notch 23 as shown in FIG. 6, and breaks at an appropriate portion of the weak portion 22. As a result, the electric connection box H is no longer supported, and the electric connection box H drops, so that the same effect as in the first embodiment can be obtained.

Third Embodiment Next, a third embodiment of the present invention will be described.

In the electrical junction box mounting structure of the third embodiment, the mounting brackets at the front and rear ends of the electrical junction box are configured as shown in FIGS. 7 and 8.

That is, the mounting bracket 30 is divided into two parts, a member 32 having a fixing screw insertion hole 31 and a member 33 on the electric junction box body 1 side (right side in the figure). The prismatic protrusions 34 provided are press-fitted into the square holes 33a provided on the end face of the latter to integrally form them.

Since the both are connected by the prismatic projection 34, the root of the prismatic projection 34 functions as a weak portion (support eliminating portion) 35. The member 33 provided with the square holes 33a is formed with a groove 36 whose bottom communicates with the square holes 33a in parallel with the square holes 33a.

The groove 36 is provided so that the prismatic protrusion 34 can be taken out even if the prismatic protrusion 34 is broken inside the prismatic hole 33a. It also has a function of preventing cracking of the member 33 on the side of the square hole 33a when press-fitting.

In the electrical junction box having the mounting bracket 30 having such a configuration, the front end is fixed to the dash panel and the rear end is fixed to the lean hose by using screws and nuts as in the conventional case, and the electric connection box is removed. It is installed not to.

When an impact is applied from the dash panel side, the base portion of the prismatic protrusion 34 becomes a weak portion in strength, and the base portion is broken by the impact force as shown in FIG. As a result, the electric connection box H is no longer supported, and the electric connection box H falls, so that the same effect as in the first embodiment can be obtained.

[0028]

[Effect of device]

 As described above, according to the present invention, when a vehicle collides head-on and a shock is applied from the dash panel side, the electrical junction box loses its support by the support eliminating portion and falls off. Therefore, the electrical junction box does not pierce the instrument panel and project into the vehicle compartment with both ends fixed, which further improves safety in case of emergency.

[Brief description of drawings]

FIG. 1 is a detailed view of a mounting bracket in a first embodiment of the present invention, (a) is a plan view of the mounting bracket,
(B) is an Ib-Ib arrow sectional view of the (a) figure.

FIG. 2 is a perspective view of a mounting bracket according to the first embodiment of the present invention.

3A and 3B are views showing the operation of the first embodiment of the present invention, in which FIG. 3A is a plan view of a mounting bracket, and FIG.
It is sectional drawing cut | disconnected along the IIIb-IIIb line of a figure.

FIG. 4 is a detailed view of a mounting bracket according to a second embodiment of the present invention, (a) is a plan view of the mounting bracket,
4B is a sectional view taken along line IVa-IVa in FIG.

FIG. 5 is a perspective view of a mounting bracket according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view of an essential part for explaining the operation of the second embodiment of the present invention.

FIG. 7 is an exploded perspective view of a mounting bracket according to a third embodiment of the present invention.

8A and 8B are views showing a structure of a mounting bracket according to a third embodiment of the present invention, in which FIG. 8A is a plan view, FIG. 8B is a side view, and FIG. 8C is a line VIIIc-VIIIc in FIG. It is sectional drawing cut | disconnected along.

FIG. 9 is a side view of an essential part for explaining the operation of the third embodiment of the present invention.

FIG. 10 is a perspective view of a conventional electrical junction box.

FIG. 11 is a side view of a conventional electrical junction box mounting structure.

[Explanation of symbols]

 H Electric connection box 4 Engine room 5 Vehicle compartment 6 Dash panel 7 Instrument panel 8 Lean hosement (Structural members) 10, 20, 30, Mounting brackets 11, 21, 31 Screw insertion hole 12 Vent hole (Support elimination part) 14 Fixing screw 15 Nuts 22, 35 Weak part (support elimination part)

Claims (1)

[Scope of utility model registration request] 1. An electric connection box is provided inside the instrument panel, and a front end mounting bracket of the electric connection box is fixed to a dash panel that separates an engine room and a vehicle compartment in the front of the vehicle. In the mounting structure of an electric connection box for an automobile, in which the rear end mounting bracket of the electric connection box is fixed to the structural member of, at least one of the front end mounting bracket and the rear end mounting bracket is subjected to the impact from the dash panel side. A structure for mounting an electric junction box for a vehicle, which is provided with a support canceling portion that positively cuts off support by fixing.