JP2015193342A - Vehicle floor structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a deformation of an open hole for a wiring harness without causing problems such as a cost rise or a weight increase, and thereby to provide a vehicle floor structure with which the breakage or compression of the wiring harness can be prevented.SOLUTION: At the center part of a vehicle width direction, a mountain-shaped tunnel part 10 is formed extending in a vehicle longitudinal direction from a dash panel 3g till a vertical wall part 3n of a seat fitting bench 3j. At the front end part of the tunnel part 10, an inclined wall 10c inclining obliquely upward is provided, and a through-hole 10d for inserting a wiring harness 11 is provided in an upper wall 10a. Also, a reinforcement plate 12 covering the periphery of the through-hole 10d of the upper wall 10a is fixed to the upper wall 10a, and the end part 12b of the reinforcement plate 12 is positioned near the lower end part 3n' of the vertical wall part 3n of the seat fitting bench 3j.

Description

The present invention relates to a floor structure of a cab over type or a pickup type automobile, and more particularly, to an improvement in an impact absorbing structure of the tunnel portion when a tunnel portion is provided on the floor.

  Generally, in a car such as a cab-over type truck, a power unit is disposed below a passenger seat, a mountain-shaped tunnel part is formed on the floor, and the traveling wind is guided to the power unit through the tunnel part to cool it. Like to do.

As a conventional floor structure having such a tunnel portion, for example, there is a structure described in Patent Document 1. In this conventional structure, an expansion space is provided at the front end portion of the tunnel portion and a plurality of beads extending in the circumferential direction are formed on the peripheral side wall of the expansion space, and the expansion space is buckled and deformed at the time of a vehicle collision. To absorb.

JP-A-8-53073

By the way, in the said floor structure, the through-hole for routing the wire harness which connects a battery and the electrical equipment in an instrument panel may be formed in a mountain-shaped tunnel part.

When a car having such a floor structure collides head-on with a pole-shaped obstacle, the tunnel portion is buckled and deformed, and particularly, the through-hole portion is greatly deformed, so that the wire harness may be disconnected or compressed. There is.

Here, in order to prevent the deformation of the through hole, it may be possible to arrange a reinforcing plate around the through hole, but in order to increase the deformation preventing effect of the through hole, the reinforcing range by the reinforcing plate is expanded, It is necessary to increase the thickness of the reinforcing plate, resulting in an increase in cost and weight.

The present invention has been made in view of the above-described conventional situation, and prevents deformation of the through hole for the wire harness without incurring problems of cost increase and weight increase, thereby preventing disconnection or compression of the wire harness. The challenge is to provide a floor structure.

The present invention is such that a dash panel is erected at the front end of the floor panel, and a seat mounting seat is formed at the rear so as to form a step upward, and the vertical position of the seat mounting seat from the dash panel to the center in the vehicle width direction. In the automobile floor structure in which a mountain-shaped tunnel extending in the vehicle longitudinal direction to the wall is formed,
An inclined wall that is inclined obliquely upward is provided at the front end of the tunnel portion, a through hole through which a wire harness is inserted is formed in the upper wall of the tunnel portion, and a reinforcing plate that covers the periphery of the through hole of the upper wall is formed on the upper wall. The reinforcing plate is fixed to the wall, and the rear end portion of the reinforcing plate is positioned near the lower end portion of the vertical wall portion of the seat mounting seat.

According to the automobile floor structure of the present invention, a reinforcing plate that covers the periphery of the through hole is provided on the upper wall of the tunnel portion, and the rear end portion of the reinforcing plate is positioned near the lower end portion of the vertical wall portion of the seat mounting seat. Therefore, the vicinity of the lower end is the weakest portion having the lowest strength and rigidity. Further, the inclined wall provided at the front end of the tunnel portion has a function of causing the collision force to act obliquely upward when the vicinity of the center portion in the width direction of the vehicle collides with, for example, a pole-shaped obstacle.

Thereby, before the through-hole vicinity buckles and deforms, bending deformation in which the tunnel portion is bent so as to rotate upward from the weakest portion is stably induced. As a result, disconnection or compression of the wire harness can be avoided.

In the present invention, since the above-mentioned effect can be realized only by forming an inclined wall in the tunnel portion and positioning the rear end portion of the reinforcing plate near the lower end portion of the vertical wall portion of the seat mounting seat, the reinforcing range can be expanded. , There is no need to increase the thickness of the reinforcing plate, and therefore no increase in cost and weight occurs.

It is a side view of the cab over type truck to which the floor structure concerning Example 1 of the present invention was applied. It is a top view which represents the said floor structure typically. It is a perspective view of the floor structure. FIG. 4 is a cross-sectional side view of the floor structure (a cross-sectional view taken along line IV-IV in FIG. 2). It is a cross-sectional side view for demonstrating the deformation | transformation at the time of the impact absorption of the said floor structure.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIGS. 1 to 5 are diagrams for explaining a floor structure of a cab over type truck according to a first embodiment of the present invention. In this embodiment, front and rear and left and right mean front and rear and left and right when viewed in a driver's seat.

In the figure, reference numeral 1 denotes a cab over type truck having a floor structure of the present embodiment. The vehicle body frame 2 of the truck 1 includes left and right side members 2a and 2a, a cross member 2b connecting the front ends of the members 2a and 2a, and other cross members (not shown). A cabin 3 is mounted on the front part of the body frame 2, a loading platform 4 is mounted on the rear part, and a power unit 5 is mounted near the lower part of the cabin 3 of the body frame 2. 6a is a front wheel and 6b is a rear wheel.

The cabin 3 includes a floor panel 3a, a back panel 3b, left and right side panels 3c and 3c, a front panel 3d, and a roof panel 3e. A door opening 3 f is formed in the side panel 3 c, and the door opening 3 f is opened and closed by the door 7.

A dash panel 3g is connected to the front end of the floor panel 3a. The dash panel 3g has a lower panel 3h that forms a part of the floor panel and a vertical panel 3i that rises upward, and an instrument panel 9 is disposed on the vertical panel 3i. The front edge 3a 'of the floor panel 3a is joined to the rear edge 3h' of the lower panel 3h by spot welding.

A seat mounting seat 3j is formed on the rear portion of the floor panel 3a so as to have a step upward. The seat mounting seat 3j has a maintenance opening 3m, a seat surface 3k on which the seat 8 is mounted so as to cover the opening, and a vertical wall connecting the seat surface 3k and the rear end portion of the floor panel 3a. Part 3n.

Furthermore, at the center in the vehicle width direction of the floor panel 3a and the dash panel 3g, a mountain shape extending in the vehicle front-rear direction from the vertical panel 3i of the dash panel 3g to the vertical wall 3n of the seat mounting seat 3j. The tunnel portion 10 is formed. The tunnel portion 10 has an upper wall 10a and left and right side walls 10b and 10b connecting the left and right edges of the upper wall 10a and the lower panel 3h of the floor panel 3a and the dash panel 3g. An inclined wall 10c is formed at the front end portion of the tunnel portion 10 by inclining the upper wall 10a obliquely upward, and the front end portions of the left and right side walls 10b, 10b are connected to the inclined wall 10c. It is expanded upwards along. The tunnel portion 10 is formed at the same time when the dash panel 3g and the floor panel 3a are press-formed.

A through hole 10d through which the wire harness 11 is inserted is formed in the upper wall 10a of the tunnel portion 10, and a grommet 13 fitted so as to be in close contact with the wire harness 11 is fitted to the periphery of the through hole 10d. The groove 13a is fitted. The wire harness 11 connects a battery disposed in the vicinity of the power unit 5 and an electrical component disposed in the instrument panel 9.

Further, a reinforcing plate 12 covering the periphery of the through hole 10d is welded and fixed to the upper wall 10a. The reinforcing plate 12 has a rectangular flat plate shape that matches the shape of the upper wall 10a. The reinforcing plate 12 has a larger diameter than the through-hole 10d and is provided with an escape hole 12a for avoiding interference with the peripheral edge of the grommet 13. ing. The rear end portion 12b of the reinforcing plate 12 is located in the vicinity of the lower end portion 3n ′ of the vertical wall portion 3n of the seat mounting seat 3j.

According to the automobile floor structure of the present embodiment, the reinforcing plate 12 that covers the periphery of the through hole 10d is provided on the upper wall 10a of the tunnel portion 10, and the rear end portion 12b of the reinforcing plate 12 is attached to the seat mounting seat 3j. Since it is positioned near the lower end 3n ′ of the vertical wall 3n, the vicinity of the lower end 3n ′ is the weakest part having the lowest strength and rigidity. The inclined wall 10c provided at the front end of the tunnel portion 10 has a function of causing a collision force F to act obliquely upward when a substantially central portion in the width direction of the vehicle collides with the pole-shaped obstacle A.

As a result, before the through hole 10d is buckled and deformed, the tunnel portion 10 is stably induced to bend so that the tunnel portion 10 is rotated upward from the weakest portion 3n ′ (see FIG. 5). As a result, disconnection or compression of the wire harness 11 can be avoided.

Further, in the present embodiment, the function and effect can be obtained only by forming the inclined wall 10c in the tunnel portion 10 and positioning the rear end portion 12b of the reinforcing plate 12 near the lower end portion 3n 'of the vertical wall portion 3n of the seat mounting seat 3j. Therefore, there is no need to expand the reinforcing range and increase the thickness of the reinforcing plate, and therefore, the cost and weight do not increase.

3a Floor panel 3g Dash panel 3j Seat mounting seat 3n Vertical wall portion 3n 'Lower end portion 10 of vertical wall portion Tunnel portion 10a Upper wall 10c Inclined wall 10d Through hole 11 Wire harness 12 Reinforcing plate 12b Reinforcing plate rear end portion

Claims (1)

A dash panel is erected at the front end of the floor panel, and a seat mounting seat is formed at the rear to form a step upward, and the vehicle extends from the dash panel to the vertical wall of the seat mounting seat at the center in the vehicle width direction. In the automobile floor structure in which a mountain-shaped tunnel extending in the front-rear direction is formed,
An inclined wall inclined obliquely upward is provided at the front end portion of the tunnel portion,
Forming a through hole through which the wire harness is inserted in the upper wall of the tunnel portion;
Fixing a reinforcing plate covering the periphery of the through hole of the upper wall to the upper wall;
A floor structure of an automobile, wherein a rear end portion of the reinforcing plate is positioned near a lower end portion of a vertical wall portion of the seat mounting seat.

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