Vehicle body reinforcing structure and manufacturing method of vehicle body reinforcing structure

1. A vehicle body reinforcing structure comprising:

a reinforcing member having a through-hole penetrating through the reinforcing member in a plate-thickness direction of the reinforcing member, the reinforcing member being located inside a closed-section structure of a vehicle body framework portion of a vehicle, the reinforcing member being panel-shaped;

a first panel located at a position closer to an outside of the vehicle than the reinforcing member is;

a second panel constituting the closed-section structure together with the first panel, the second panel being located at a position closer to an inside of the vehicle than the reinforcing member is; and

a foaming adhesive member filled in an internal space of the closed-section structure, wherein

the first panel and the second panel are bonded to each other by the foaming adhesive member penetrating through the through-hole of the reinforcing member, and

the foaming adhesive member is filled, in the internal space, between the first panel and the reinforcing member and between the second panel and the reinforcing member.

2. The vehicle body reinforcing structure according to claim 1 , wherein:

the reinforcing member, the first panel, and the second panel are arranged along a joining direction in which the first panel and the second panel are joined to each other; and

the foaming adhesive member extends along the joining direction between the first panel and the second panel.

3. The vehicle body reinforcing structure according to claim 1 , wherein the first panel is an outer panel, the second panel is an inner panel, and the reinforcing member is a reinforcement.

4. The vehicle body reinforcing structure according to claim 3 , wherein the vehicle body reinforcing structure includes a plurality of the reinforcements.

5. A manufacturing method of a vehicle body reinforcing structure comprising:

(a) placing a first panel, with a predetermined space between the first panel and a reinforcing member, at a position closer to an outside of a vehicle than the reinforcing member is, the reinforcing member being panel-shaped, the reinforcing member having a through-hole penetrating through the reinforcing member in a plate-thickness direction of the reinforcing member, and the reinforcing member being placed inside a closed-section structure of a vehicle body framework portion of the vehicle;

(b) placing a second panel, with a predetermined space between the second panel and the reinforcing member, at a position closer to an inside of the vehicle than the reinforcing member is;

(c) forming the closed-section structure, by step (a) and step (b), the second panel constituting the closed-section structure together with the first panel;

(d) placing a precursor of a foaming adhesive member in an internal space of the closed-section structure;

(e) after step (d), heating the precursor to foam; and

(f) after step (e), causing the precursor to penetrate through the through-hole such that the foaming adhesive member is filled between the reinforcing member and the first panel and between the reinforcing member and the second panel.