JP2872356B2 - Lower body structure of vehicle - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a lower body structure of a vehicle, and more particularly, to a structure of a joint between a side sill and a pillar.

(Prior Art) A floor panel formed on the floor of a vehicle compartment is provided with a side sill of a closed section extending in the front-rear direction on both sides thereof, and a pillar is coupled to the side sill. The joint between the side sill and the pillar is generally reinforced with reinforcement, and this reinforcement is
As can be seen in Japanese Utility Model Application Publication No. 56-25663, both ends in the front-rear direction are joined to the side sill inner, the middle part in the front-rear direction is abutted on the side sill outer, or both the front and rear sides are joined to the side sill outer. Occasionally, the configuration was such that the middle portion in the front-rear direction was brought into contact with the side sill inner.

Such a configuration is inevitable when the side sill has a closed cross section. That is, the side sill is usually joined to the side sill inner and the side sill outer by a spot welding method. In the case where the front and rear both sides of the reinforcement are joined to the side sill outer, the reinforcement is previously attached to the side sill outer. And then spot welding the side sill outer and the side sill inner. For this reason, since the reinforcement in the side sill does not directly contact the side sill outer at the middle portion in the front-rear direction, the middle portion cannot be spot-welded.

Therefore, an object of the present invention is to provide a lower vehicle body structure of a vehicle in which a front-rear direction intermediate portion of the above-described reinforcement can be joined to a side sill outer or a side sill inner.

(Means for Solving the Problems) In order to achieve such a technical problem, in the present invention,
A side sill having a closed cross section by the side sill inner and the side sill outer is coupled to a pillar having a closed cross section by the pillar inner and the pillar outer. The pillar reinforcement extends to a lower end of the side sill, and a lower end of the pillar reinforcement is sandwiched by a joint between the side sill inner and the side sill outer, and is joined to the side sill inner and the side sill outer. A lower end of the reinforcement is joined to the side sill outer at a middle portion in the front-rear direction of the reinforcement, and is joined to the side sill inner at a front-rear end of the reinforcement. The side sill outer has the pillar information. The electrode insertion hole of the spot welding machine that joins the front-rear end of the pillar reinforcement is located at a position facing the front-rear end of the pillar reinforcement, with the portion where the reinforcement abuts therebetween. It is configured to face outward.

Further, the preferred embodiment of the first aspect is as described in the second and subsequent aspects.

(Operation) By adopting the above-described configuration, an electrode is inserted from the hole when spot-welding the front-rear intermediate portion of the pillar reinforcement to the side sill outer in advance and then spot-welding the side sill outer and the side sill inner. Thus, it is possible to spot-weld the front and rear ends of the pillar reinforcement and the side sill inner.

(Effect) Therefore, since the pillar reinforcement that has penetrated into the side sill is joined to the side sill at both the front and rear ends and the middle part, the reinforcing effect of the pillar reinforcement can be enhanced, and The rigidity of the joint with the pillar can be improved.

According to the second aspect, the holes used at the time of welding are:
Since it is covered with the garnish and cannot be seen from the outside, it is preferable in terms of improving the appearance.
Further, according to the third aspect, it is preferable to further improve the rigidity of the joint portion between the pillar and the side sill.

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

In FIG. 4, reference numeral 1 denotes a side sill,
A front pillar 2 is connected to a front end 1a of the side sill 1 and a center pillar 3 is connected to an intermediate portion in the front and rear direction on both sides of the passenger compartment. Pillar reinforcement 4 for A
Has penetrated, and the pillar reinforcement 5 has penetrated into the joint B with the center pillar 3. On the premise of the above, the coupling portions A and B will be described in detail with reference to FIGS.

FIG. 2 shows a joint B between the center pillar 3 and the side sill 1.
The side sill 1 has a closed cross-sectional structure C formed by a side sill outer 6 and a side sill inner 7, and the side sill outer 6 has a hat-shaped cross section that bulges out of the vehicle, and has an upper end 6a and a lower end 6b. To, side sill inner 7
The upper end portion 7a and the lower end portion 7b are respectively abutted, and the floor panel 9 is abutted on the lower end portion 7b and spot-welded. On the other hand, the center pillar 3 has a closed cross-sectional structure D formed by a pillar outer 10 and a pillar inner 11, and the pillar outer 10 has a hat-shaped cross section that bulges out of the vehicle, and has a front end portion 10a and a rear end portion 10b. The front end 11a and the rear end 11b of the pillar inner 11 are respectively abutted and spot-welded.

The side sill outer 6 is a pillar outer here.
The side sill 7 is formed integrally with the pillar inner 11.

The pillar reinforcement 5 is disposed within the closed cross section D of the center pillar 3 and extends in the vertical direction, and has a hat-shaped cross section that bulges out of the vehicle, and has a front end and a rear end. , And are spot-welded between the pillar outer 10 and the pillar inner 11. The lower end of the pillar reinforcement 5 is sandwiched between a lower end 6b of the side sill outer 6 and a lower end 7b of the side sill inner 7,
At the lower end 5a of the pillar reinforcement 5, both ends 5b in the front-rear direction are spot-welded to the side sill inner 7, and the middle part 5c in the front-rear direction is brought into contact with the side sill outer 6, so that the side sill outer 6 is formed. Spot welded.

The side sill outer 6 is provided with two holes 20 before and after the pillar reinforcement 5 with the pillar reinforcement 5 interposed therebetween, and the holes 20 are opened toward the outside of the vehicle. More specifically, a hole 20 is formed at the lower end of the pillar reinforcement 5 so as to face both ends 5b in the front-rear direction,
A grommet 21 is attached to the hole 20 later.

In joining the above elements, first, at the lower end 5a of the pillar reinforcement 5, the front-rear direction intermediate portion 5c is spot-welded to the side sill outer 6, and then when the side sill outer 6 and the side sill inner 7 are welded, Both ends 5b of pillar reinforcement 5 in the front-rear direction are holes 20
Spot welding. 1 and 2, reference numeral 22 denotes an electrode of the spot welding machine.

The connection portion A between the front pillar 2 and the side sill 1 is also basically configured in the same manner as the connection portion B, and the pillar reinforcement 4 has a lower end 4a as shown in FIG. The rear end 4b uses the hole 20 to
The middle portion 4c in the front-rear direction is spot-welded to the side sill outer 7.
Also in each of the above figures, the crosses indicate welding points. still,
In FIG. 3, reference numeral 25 denotes a torque box.

The side sill 1 has a side sill garnish 30 whose outside surface is covered with a side sill garnish 30. The side sill garnish 30 has a plurality of pins 31 protruding from the inner surface thereof, and a hole 32 formed in the side sill outer 6. The pin 31 is fitted into the side sill 2.

In the above configuration, the pillar reinforcement 4
And 5 are joined to the side sill outer 6 and the side sill inner 7, so that the rigidity of the connecting portions A and B can be increased. The hole 20 into which the electrode 22 of the spot welding machine is inserted is also effective for coating the inside of the side sill 1 because the electrodeposition liquid flows through the hole 20 into and out of the side sill 1 in the electrodeposition coating. . Also, side sill 1
When the rust-preventive oil is applied to the inside, the nozzle 32 can be inserted into the side sill 1 using the hole 20 as shown in FIG. 1, which is also effective for applying the rust-preventive oil. .

[Brief description of the drawings]

1 is a cross-sectional view taken along the line II shown in FIGS. 2 and 4, FIG. 2 is a perspective view partially showing a connecting portion between a side sill and a center pillar, and FIG. 3 is a III shown in FIG. FIG. 4 is a front view of the side sill, front pillar and center pillar as viewed from the outside of the vehicle. 1: Side sill 2: Front pillar 3: Center pillar 4: Pillar reinforcement provided on front pillar 4b: Front-rear end at lower end of pillar reinforcement 4c: Front-rear middle at lower end of pillar reinforcement Part 5: Pillar reinforcement provided on the center pillar 5b: Front-rear end at the lower end of pillar reinforcement 5c: Front-rear middle part at the lower end of pillar reinforcement 6: Side sill outer 7: Side sill inner × ： Welding point

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Ryusuke Matsuda 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Inside Mazda Co., Ltd. (56) References JP-A-1-254476 (JP, A) Shokai Sho56 −25663 (JP, U) Fully open Sho 61-105274 (JP, U) (58) Fields investigated (Int.Cl. ⁶ , DB name) B62D 25/04 B62D 25/20

Claims (3)

(57) [Claims] 1. A side sill having a closed section formed by a side sill inner and a side sill outer is coupled to a pillar having a closed section formed by a pillar inner and a pillar outer, and a pillar reinforcement straddles the side sill and the pillar. The pillar reinforcement is extended to the lower end of the side sill, and the lower end is sandwiched by a joint between the side sill inner and the side sill outer. The lower end of the pillar reinforcement is joined to the side sill outer at the middle portion in the front-rear direction and is joined to the side sill outer, and the front and rear end is contacted to the side sill inner. The side sill outer is joined to the side sill inner. A hole for electrode insertion of a spot welding machine that joins the front-rear end of the pillar reinforcement at a position facing the front-rear end of the pillar reinforcement across a portion where the reinforcement abuts. A lower body structure of a vehicle, which is formed outwardly in a vehicle width direction. 2. The lower vehicle body structure according to claim 1, wherein said hole is covered by a garnish covering an outer side surface of said side sill in a vehicle width direction. 3. The lower body structure of a vehicle according to claim 1, wherein a torque box is joined to a joint between the pillar reinforcement and the side sill inner.