JP2000108949A - Car body floor structure of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the car body floor of an automobile where the safety of an occupant can be obtained by absorbing enough the residual shock energy that the crush of the front of the car body can not absorb, by the car floor. SOLUTION: This structure is equipped with a pair of reinforcing members 20 which are separated from each other under face of the top 11A of a tunnel part 11 and are each arranged from under face of the top 11A of the tunnel part 11 to the bottom of the floor face 12 via the inner face of the side 11B of the tunnel part 11. This is reinforced by the reinforcing member 20, covering the tunnel part 11 and the floor face 12, whereby the rigidity of the floor is secured, while a weak part is made in the range of the tunnel part 11 between several reinforcing members 20 parting from each other and when shock load at a specified value or over works on the car body, the deformation of the weak part of the tunnel part where the influence on an occupant is little absorbs the residual shock energy that the crush of the front of the car body such as an engine room or the like could not absorb.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body floor structure, and more particularly to a vehicle body floor structure in which a reinforcing member is disposed in a tunnel formed on a vehicle body floor.

[0002]

2. Description of the Related Art Generally, a tunnel portion extending in the front-rear direction of a vehicle body is formed on a vehicle body floor of an automobile, and, for example, a driver seat and a passenger seat are provided on each floor surface extending left and right across the tunnel portion. And a seat belt anchor attaching portion for attaching and supporting the seat belt to the tunnel portion is formed.

[0003] The vehicle body floor is, for example, a Japanese Utility Model 1-4166.
As disclosed in Japanese Patent Application Publication No. 0-104, and a cross-sectional view of a main part in FIG. 8, a tunnel portion 102 extending in the front-rear direction is formed on a vehicle body floor 101, and floor surfaces 103 are formed on both sides of the tunnel portion 102. ing.

A bulged portion 104a having an inverted U-shaped cross section and fitted to the lower surface of the tunnel portion 102, and the bulged portion 104a
And a substantially hat-shaped reinforcing member 1 having an extending portion 104b extending from both ends of the floor surface 103 so as to be overlapped with the lower surface of the floor surface 103.
04 is overlapped on the tunnel portion 102 of the floor 101 and the lower surface of the floor surface 103 and welded together to form the vehicle body floor 1
01 and the bolts 105 and nuts 106 on the side surfaces of the tunnel portion 102 and the reinforcing member 104, which have secured rigidity.
The seat belt anchor 120 is attached by the.

Therefore, the seat belt anchor attachment portion formed in the tunnel portion 102 is reinforced by the reinforcing member 104, and the seat belt anchor 120 can be attached and supported with sufficient rigidity. 102 is reinforced by the reinforcing member 104, and the rigidity of the vehicle body floor 101 is ensured.

On the other hand, for example, when an impact load of a predetermined value or more is applied from the front of the vehicle body, the front part of the vehicle body, such as an engine room, is crashed, so that the impact energy is sufficiently absorbed to avoid the influence on the vehicle interior. Measures have been taken.

In addition, if the front body has a relatively small overall length and a sufficient crash stroke at the front of the vehicle cannot be ensured, the remaining impact energy that cannot be absorbed by the crash at the front of the vehicle alone can be obtained. It is necessary to efficiently disperse and absorb the residual energy by absorbing the deformation due to the deformation.

[0008]

However, the above-mentioned actual fairness 1
According to the prior art disclosed in JP-A-41660, the vehicle body floor 10 is provided by reinforcing members 104 continuously disposed on the left and right floor surfaces 103 and the lower surface of the tunnel portion 102.
1 is reinforced, and the shape of the portion of the vehicle body floor 101 is restrained.

As a result, it is difficult to absorb the remaining impact energy that cannot be absorbed due to the crash of the front portion of the vehicle body due to deformation of the vehicle body floor, and the remaining impact energy is converted into an impact to the occupant. May be lost.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention, which has been made in view of the above point, is that the remaining impact energy that cannot be absorbed by the crash of the front portion of the vehicle body can be sufficiently absorbed by the vehicle body floor to avoid an excessive impact on the occupant. An object of the present invention is to provide a vehicle body floor with excellent safety.

[0011]

According to a first aspect of the present invention, there is provided a vehicle body floor structure in which a tunnel portion is formed extending in a vehicle longitudinal direction, and a floor surface is provided on both sides of the tunnel portion. In the automobile body floor structure formed with, the upper lower edge of the tunnel portion is separated from each other at the upper lower surface thereof, and also extends from the upper lower surface of the tunnel portion to the lower surface of the floor surface via the inner side surface of the tunnel portion. It is characterized by comprising a pair of reinforcing members arranged.

According to the first aspect of the present invention, the rigidity of the floor is ensured by the reinforcing member over the tunnel portion and the floor surface near the tunnel portion, while the tunnel between the upper edges of the reinforcing members separated from each other. Since the area of the part is not stiffened by each reinforcing member and a fragile part is formed in the part, for example, when an impact load of a predetermined value or more is applied from the front of the vehicle body, the front part of the vehicle body such as an engine room is The remaining impact energy that could not be absorbed by the crash is absorbed by the deformation of the fragile portion formed in the tunnel portion, which has little effect on the occupant.

As a result, excessive deformation of the vehicle body floor structure is prevented, and the impact load is efficiently distributed from the vehicle body floor structure to other vehicle body members, thereby protecting the occupant in the vehicle cabin from the impact.

According to a second aspect of the present invention, in the vehicle body floor structure of the first aspect, the seat belt anchor attaching portion formed in the tunnel portion for attaching and supporting the seat belt anchor of the seat belt is provided with the reinforcing member. Characterized by being stiffened by:

According to the second aspect of the present invention, the seat belt anchor attaching portion formed in the tunnel portion is stiffened by the reinforcing member, so that it is not necessary to attach a dedicated reinforcing member to reinforce the seat belt anchor attaching portion. The structure can be simplified and the weight of the vehicle floor can be reduced.

According to a third aspect of the present invention, in the vehicle body floor structure of the first or second aspect, the handbrake mounting portion formed in the tunnel portion for mounting and supporting the handbrake operating device is provided by the reinforcing member. It is characterized by being stiffened.

According to the third aspect of the present invention, the hand brake mounting portion formed in the tunnel portion is stiffened by the reinforcing member, and a dedicated reinforcing member for reinforcing the hand brake mounting portion can be omitted, and the configuration is simplified. In addition, the weight of the vehicle body floor can be reduced.

According to a fourth aspect of the present invention, in the vehicle body floor structure of the first to third aspects, a propeller shaft mounting bracket for supporting a center bearing of the propeller shaft is provided between lower ends of the reinforcing members. It is characterized by the following.

According to the fourth aspect of the present invention, since the propeller shaft mounting bracket for supporting the center bearing is mounted between the lower ends of both reinforcing members, a dedicated mounting member for mounting and supporting the propeller shaft mounting bracket is separately provided. This eliminates the necessity of performing, and simplification of the configuration and weight reduction of the vehicle body floor can be obtained.

According to a fifth aspect of the present invention, in the vehicle body structure of the first aspect, each of the reinforcing members has an upper surface portion coupled to an upper lower surface of the tunnel portion and a lower surface of the floor surface. A base having a lower surface to be joined, a pair of side surfaces disposed along an inner surface of a side of the tunnel connecting between both ends of the upper and lower surfaces, and both side surfaces of the base; And a bulge formed in a bead-like shape inside the tunnel from the upper surface to the lower surface.

According to a fifth aspect of the present invention, the reinforcing member of the first aspect has a specific shape, and the rigidity of the reinforcing member is secured by a bead-shaped bulging portion formed by bulging at a base. The upper and lower portions of the upper and lower surfaces of the tunnel portion, the side portions of the side portion of the tunnel portion, and the lower surface portion of the lower surface of the floor surface are connected to each other so that the reinforcing member is securely provided on the tunnel portion and the floor surface. Thus, the deformation of the fragile portion formed above the tunnel portion due to the remaining impact energy is ensured, and the influence on the occupant can be further avoided.

According to a sixth aspect of the present invention, in the vehicle body floor structure according to the fifth aspect, a seat belt anchor mounting portion for mounting and supporting a seat belt anchor of a seat belt is coupled to an upper lower surface of the tunnel portion. It is characterized in that it is surrounded by the upper surface of the member and the upper part of each side surface, and is formed on the upper surface of the tunnel corresponding to the bulging portion.

According to the sixth aspect of the present invention, the seat belt anchor attachment portion can be efficiently stiffened by the upper portion of the upper surface and the side portion connected to the tunnel portion so as to surround the seat belt anchor attachment portion, and the seat belt can be stiffened. It is possible to dispose an anchor mounting nut or the like on the lower surface of the anchor mounting portion, and it is possible to omit a dedicated reinforcing member for reinforcing the seat belt anchor mounting portion, thereby simplifying the configuration and reducing the weight of the vehicle body floor. Is obtained.

According to a seventh aspect of the present invention, in the vehicle body floor structure according to the fifth or sixth aspect, a handbrake mounting portion for mounting and supporting a handbrake operating device is coupled to an upper lower surface of the tunnel portion. It is characterized in that it is formed on the upper surface of the tunnel portion close to the upper surface of the member.

According to the seventh aspect of the present invention, since the upper surface of the reinforcing member is connected to the upper part of the tunnel near the handbrake mounting portion where the handbrake operating device is mounted, the handbrake mounting portion is stiffened and the handbrake is braked. A reinforcing member for attaching the operating device can be omitted, and the configuration can be simplified and the weight of the vehicle body floor can be reduced.

According to an eighth aspect of the present invention, in the vehicle body floor structure according to any one of the fifth to seventh aspects, a propeller shaft mounting bracket for supporting a center bearing of the propeller shaft is provided on both of the reinforcing members. It is characterized by being installed between the lower ends of the protrusions.

According to the eighth aspect of the present invention, by attaching the propeller shaft mounting bracket to the lower end of the bulging portion of the reinforcing member, the propeller shaft mounting bracket is firmly mounted, and the propeller shaft can be stably supported. In addition, there is no need to separately provide a dedicated mounting member for mounting and supporting the propeller shaft mounting bracket, so that the configuration can be simplified and the vehicle body floor can be reduced in weight.

According to a ninth aspect of the present invention, in the vehicle body floor structure of the eighth aspect, the propeller shaft mounting bracket is reinforced by a relative load of a predetermined value or more acting between the propeller shaft and the reinforcing member. It is characterized in that it is installed between the lower ends of the bulging portions of both reinforcing members by a propeller shaft drop-off mechanism that is detached from the member.

According to the ninth aspect of the present invention, the restraint of the two reinforcing members by the propeller shaft mounting bracket is released by the relative load acting between the propeller shaft and the reinforcing member, and the impact load of a predetermined value or more from the front of the vehicle body. Absorption of residual impact energy due to deformation of the fragile portion when acts is surely performed.

According to a tenth aspect of the present invention, in the structure of the vehicle body floor of the first aspect, the reinforcing member is spaced apart from a seat mounting seat bracket disposed on the upper surface of the floor surface in a plan view. It is characterized by having been established.

According to the tenth aspect of the present invention, since the reinforcing member and the seat bracket are separated from each other in a plan view and a fragile portion is formed in the portion, for example, an impact load of a predetermined value or more from the front of the vehicle body. Works, the remaining impact energy can be absorbed in this portion together with the fragile portion formed in the tunnel portion.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vehicle body floor according to the present invention will be described below with reference to FIGS.

FIG. 1 is a schematic perspective view of a vehicle body floor structure 1 showing an outline of the present embodiment, wherein reference numeral 10 denotes a front floor, and arrow F indicates a forward direction of the vehicle body.

The front floor 10 is formed with a tunnel portion 11 extending in the vehicle longitudinal direction and having a substantially inverted U-shaped cross section.
Floor surfaces 12 extend on both sides of the tunnel portion 11, and both side edges of the left and right floor surfaces 12 are respectively connected to side sills 18 (only one is shown) extending in the vehicle longitudinal direction.

The front edge of the front floor 10 is connected to the lower end of a toeboard (not shown) that separates the interior of the vehicle from the engine room, and the rear edge of the front floor 10 is connected to the rear floor (not shown). Have been.

A cross member 13 is provided on the left and right floor surfaces 12 and the upper surface of the tunnel portion 11 so as to extend in the width direction of the vehicle body and be welded together, and both ends are welded to the side surfaces of the left and right side sills 18, respectively. The cross member 13
The outer end on the floor surface 12 is the side sill 1
8 is welded to the side surface, and the inner end 14a is
1 bracket 1 for seat attachment reaching the side surface 11B
4 are welded.

A driver's seat and a passenger's seat are provided via a seat slide rail (not shown) which is welded and connected to the cross member 13 and the seat mounting bracket 14.

A pair of reinforcing members 20 are disposed on the lower surface of the tunnel portion 11 on the lower surface of the portion corresponding to the seat mounting bracket 14 in the vehicle longitudinal direction.

Next, FIG. 2 is an enlarged sectional view taken along the line II of FIG. 1, FIG. 3 is a side view of the reinforcing member 20 taken in the direction of arrow A in FIG. 2, and FIG. FIG. 5 shows a side view of a main part viewed from the direction B, and FIG. 5 illustrates a perspective view of the reinforcing member 20.

The reinforcing member 20 is provided on the upper part 1 of the tunnel 11.
1A, the side 1 of the tunnel portion 11 from substantially the center in the vehicle width direction.
The lower surface of the upper portion 11A of the tunnel portion 11 is formed in a substantially S-shaped or Z-shaped shape that is smoothly curved in a front view and is formed in a substantially rectangular shape in a side view, which is formed following the lower surface of the floor surface 12 via the lower surface of the tunnel portion 1B. 21A which can be superimposed on the lower surface 2A which can be superimposed on the lower surface of the floor surface 12 near the tunnel 11
1B, and a base 21 composed of a pair of side surfaces 21C which is provided between both ends of the upper surface portion 21A and the lower surface portion 21B and can be superposed on the inner surface of the side portion 11B of the tunnel portion 11.

Further, an upper surface portion 21A is provided at a central portion of the base portion 21.
A bulging portion 22 that bulges like a bead is formed inside the tunnel portion 11 over the lower surface portion 21B through the side surface portion 21C from above to secure the rigidity of the reinforcing member 20.

The bulging portion 22 is welded to a lower surface of a seat belt anchor mounting portion 11C formed near the side portion 11B of the upper portion 11A of the tunnel portion 11, and a nut for mounting and supporting the seat belt anchor 31 with bolts 33. 32
In the upper portion 22A of the bulging portion 22. In other words, the nut 32 welded to the lower surface of the seat belt anchor attachment portion 11C is formed so as to be surrounded by the upper portion 21A of the reinforcing member 20 and the upper portions of both side portions 21C.

Further, a lower surface portion 21 is provided below the bulging portion 22.
A propeller shaft support portion 22C having a substantially horizontal surface continuous with B is formed.

The pair of reinforcing members 20 thus formed
As shown in FIGS. 2 to 4, the upper edge 21A is welded to the lower surface of the upper portion 11A of the tunnel portion 11, with the upper edge 20a, that is, the edge of the upper surface 21A separated from each other by a predetermined distance a. Further, both side portions 21C are welded to the side portions 11B, and the lower surface portion 21B is welded to the lower surface of the floor surface 12 to be firmly connected to the tunnel portion 11 and the floor surface 12.

That is, the continuous periphery of the base portion 21 is welded to the tunnel portion 11 and the floor surface 12, and the reinforcing member 20 is firmly attached to the front floor 10. The side end portion 20b of the lower surface portion 21B of the reinforcing member 20 and the inner end portion 14a of the seat mounting bracket 14 are formed so as to be separated from each other by a predetermined dimension in a plan view.

Accordingly, the seat belt anchor attachment portion 11C formed in the tunnel portion 11 is formed by the upper surface portion 21A and both side portions 21C of the reinforcing member 20 which is firmly attached over a wide range of the tunnel portion 11 and the floor surface 12. It is surrounded and reinforced, and rigidity sufficient for the use of the seat belt is ensured.

As shown in FIGS. 1 and 2, both reinforcing members 20 attached to the tunnel 11 of the front floor 10
Between the propeller shaft support portions 22C, a rear end of a front propeller shaft 41a having a front end connected to a transmission (not shown) and a front end of a rear propeller shaft 41b having a rear end connected to a differential device. A propeller shaft mounting bracket 43 that supports the center bearing 42 is provided.

The propeller shaft support 2 of the reinforcing member 20
The connection between 1C and the propeller shaft mounting bracket 43 is as follows.
Bolt 45a inserted into bolt insertion hole 43a formed in propeller shaft mounting bracket 43 and reinforcing member 2
This is done by connecting with a fastener 45 consisting of a nut 45b welded to zero.

The propeller shaft mounting bracket 43 has a propeller shaft drop-off mechanism 44 formed thereon. A well-known technique is applied as a drop-off mechanism. As examples of the well-known technique, a bolt insertion hole 43a for inserting a bolt 45a and a propeller shaft mounting bracket 43 are provided.
A continuous slit 44a is formed between the front edge and the front edge. Propeller shaft 41 or reinforcing member 2
In the case where an impact load acts on at least one of the bolts 0 and a relative load equal to or more than a predetermined value is generated between the propeller shaft mounting bracket 43 and the reinforcing member 20, the slit 44a of the propeller shaft mounting bracket 43 and the bolt insertion hole 43
a is deformed, the propeller shaft mounting bracket 43 is detached from the reinforcing member 20, and the front propeller shaft 41a
And the propeller shaft 41 including the rear propeller shaft 41b falls off.

Further, in the upper part 11A of the tunnel part 11,
FIG. 6 shows a plan view of the tunnel portion 11, and FIG. 7 shows a side view of FIG. 6, on or between a pair of reinforcing member connecting portions 11D to which upper surface portions 21A of both reinforcing members 20 are welded. A rear handbrake mounting portion 11E is formed near the coupling portion 11D, and the rear handbrake mounting portion 1E is formed.
A front hand brake attachment portion 11F is formed in front of 1E.

Then, the rear hand brake mounting portion 11E
A handbrake mounting bracket 51 is installed between the front handbrake mounting portion 11F and the front handbrake mounting portion 11F.
The rear mounting portion 51a and the front mounting portion 51b formed at the rear end and the front end of the rear hand brake mounting portion 11 respectively.
E and the front handbrake mounting portion 11F are overlapped, and each overlapping portion is connected by a fastener 55 with a bolt 55a and a nut (not shown), and the handbrake device 50 is mounted and supported on the upper portion 11A of the tunnel portion 11. I have.

Reference numeral 53 denotes a hand brake device 50.
This is an equalizer that adjusts the operation force of the brake lever 52 and transmits the brake force to each brake device (not shown) in a distributed manner.

Therefore, the handbrake mounting portion formed in the tunnel portion 11, particularly the rear handbrake mounting portion 11
E is an overlapping or reinforcing member connecting portion 11D with a reinforcing member connecting portion 11D to which an upper surface portion 21A of a reinforcing member 20 firmly attached over the tunnel portion 11 and the floor surface 12 is connected.
D and reinforced with the hand brake device 50
Rigidity enough to cope with the use of is secured.

According to the vehicle body floor structure 1 formed as described above, the seat belt anchor mounting portion 11D for mounting and supporting the seat belt anchor 31 and the hand brake mounting portion for mounting and supporting the hand brake device 50, particularly the rear brake mounting portion. 11E is a tunnel portion 11 and a floor surface 12
Is sufficiently stiffened by the strong reinforcing member 20 connected to the
Rigidity enough to cope with the use of the seat belt and the use of the handbrake device 50 is secured.

On the other hand, the upper portion 11A of the tunnel portion 11 is formed at the upper edge 20a of the upper surface portion 21A formed on each reinforcing member 20.
Since the fragile portion α is formed in the area corresponding to the separation dimension a without being stiffened by the reinforcing member 20, for example, when an impact load of a predetermined value or more is applied from the front of the vehicle body, the engine compartment The remaining impact energy that could not be absorbed by the crash of the front part of the vehicle body, such as, is absorbed by the deformation of the fragile portion of the tunnel portion 11 that has no or little effect on the occupant.

The deformation of these fragile portions is caused by the propeller shaft mounting bracket 43 supporting the propeller shaft 41 falling off from the reinforcing member 20 by the propeller dropping mechanism 44, and the relative movement between the two reinforcing members 20 is allowed. The above deformation of these fragile portions is ensured by releasing the restraint by the propeller shaft mounting bracket 43.

As a result, excessive deformation of the vehicle body floor structure 1 is prevented, the impact load is efficiently transmitted from the vehicle body floor structure 1 to other vehicle body members, and the driver seat and the passenger seat are mounted on the vehicle body. The portion of the floor structure 1 is restrained in shape by the cross member 13 and the seat mounting bracket 14 to prevent deformation, thereby protecting the occupant in the passenger compartment.

Further, when an excessive impact load acts on the vehicle body floor structure 1, the position between the inner end portion 14 a of the seat mounting bracket 14 and the side end portion 20 b of the reinforcing member 20 has little effect on the occupant. The vulnerable portion β formed at the portion of the front floor 20 located at the position (1) is deformed and absorbs the remaining impact energy to prevent excessive deformation of the vehicle body floor, thereby securing the safety of the occupant in the vehicle interior.

In the above description, the case where an impact load is applied from the front of the vehicle body is described as an example. However, the same applies to the case where an impact load of a predetermined value or more is applied from the side of the vehicle body.
The impact energy is absorbed by the deformation of the fragile portion α formed between the reinforcing members 20 formed on the front and the fragile portion β formed on the front floor 10, and excessive deformation of the vehicle body floor 1 is prevented, so that the load can be efficiently applied to other parts. The occupant's safety is ensured by being dispersedly transmitted to the vehicle body members.

The seat belt anchor attachment portion 11C and the hand brake attachment portion, particularly the rear brake attachment portion 11E, formed in the tunnel portion 11 by the reinforcing member 20 to which the propeller shaft attachment bracket 43 supporting the center bracket 42 is connected. The seat belt anchor attachment portion 11C and the rear brake attachment portion 11 are stiffened.
There is no need to separately provide a reinforcing member for stiffening E, the structure can be simplified and the weight can be reduced, and the manufacturing cost can be reduced.

In the above embodiment, the nut 32 provided on the seat belt anchor attachment portion 11C formed on the upper portion 11A of the tunnel portion 11 is surrounded by the upper surface portion 21A and the both side surface portions 21C of the reinforcing member 20. Although 11C is stiffened, it is also possible to provide the nut 32 on the lower surface of the upper surface portion 21A of the reinforcing member 20, and the present invention is not limited to the above-described embodiment.
Various changes can be made without departing from the spirit of the invention.

[0062]

According to the vehicle body floor structure described above, the rigidity of the floor is ensured by the reinforcement by the reinforcing member over the tunnel portion and the floor surface near the tunnel portion, while the upper ends of the reinforcing members spaced apart from each other. Since the area of the tunnel portion between the edges is not stiffened by each reinforcing member and a fragile portion is formed in the portion, when an impact load of a predetermined value or more is applied to the vehicle body, the area in front of the vehicle body such as an engine room. The remaining impact energy, which could not be absorbed by the crash of the car, is absorbed by the deformation of the fragile part formed in the tunnel, which has very little effect on the occupants, preventing excessive deformation of the car body floor structure, The impact load is efficiently transmitted from the floor structure to other vehicle body members, ensuring the safety of occupants in the cabin and contributing to improved vehicle safety. It is intended that large made.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an outline of an embodiment of a vehicle body floor structure according to the present invention.

FIG. 2 is an enlarged sectional view taken along the line II in FIG.

FIG. 3 is a side view as seen from the direction of arrow A in FIG. 2;

FIG. 4 is a plan view seen from the direction of arrow B in FIG. 2;

FIG. 5 is a perspective view of a reinforcing member used in the present embodiment.

FIG. 6 is a plan view showing a tunnel section of a vehicle body floor.

FIG. 7 is a side view of FIG. 6;

FIG. 8 is a sectional view showing a main part of a conventional vehicle body floor structure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Body floor structure 10 Front floor (floor) 11 Tunnel part 11A Upper part 11B Side part 11C Seat belt anchor attaching part 11E Rear handbrake attaching part (Handbrake attaching part) 12 Floor surface 20 Reinforcement member 20a Upper edge 21 Base 21A Upper part 21B Lower surface portion 21C Side surface portion 22 Swelling portion 22C Propeller shaft support portion 31 Seat belt anchor 43 Propeller shaft mounting bracket 44 Propeller shaft drop-off mechanism

Claims (10)

[Claims] 1. A vehicle body floor structure in which a tunnel portion extending in a vehicle body front-rear direction is formed, and floor surfaces are formed on both sides of the tunnel portion. A vehicle body floor structure for a vehicle, comprising a pair of reinforcing members spaced apart from each other and arranged from the upper lower surface of the tunnel portion to the lower surface of the floor surface through the inner side surface of the tunnel portion. 2. The vehicle according to claim 1, wherein a seat belt anchor mounting portion formed in the tunnel portion for mounting and supporting a seat belt anchor of the seat belt is stiffened by the reinforcing member. Body floor structure. 3. A handbrake mounting portion formed in the tunnel portion for mounting and supporting a handbrake operating device,
The vehicle body floor structure according to claim 1 or 2, wherein the vehicle body is stiffened by the reinforcing member. 4. The vehicle body floor structure according to claim 1, wherein a propeller shaft mounting bracket for supporting a center bearing of the propeller shaft is provided between lower ends of the reinforcing members. 5. Each of the reinforcing members includes an upper surface portion coupled to an upper lower surface of the tunnel portion, a lower surface portion coupled to a lower surface of the floor surface, and a space between both ends of the upper surface portion and the lower surface portion. A base having a pair of side surfaces disposed along the inner surface of the side of the tunnel to be connected; and a bead formed inside the tunnel from the upper surface to the lower surface by being connected to both side surfaces of the base. The vehicle body structure according to claim 1, further comprising: a swelling portion formed by swelling. 6. A seat belt anchor mounting portion for mounting and supporting a seat belt anchor of the seat belt is surrounded by an upper surface portion of a reinforcing member coupled to an upper lower surface of the tunnel portion and an upper portion of each side portion, and 6. The structure according to claim 5, wherein the bulge is formed on the upper surface of the tunnel corresponding to the bulge.
The vehicle body floor structure according to claim 1. 7. A handbrake mounting portion for mounting and supporting a handbrake operating device is formed on an upper surface portion of the tunnel portion close to an upper surface portion of a reinforcing member coupled to an upper lower surface of the tunnel portion. The vehicle body floor structure according to claim 5 or 6, wherein 8. The propeller shaft mounting bracket for supporting a center bearing of the propeller shaft is provided between lower ends of bulging portions formed on the reinforcing members. Car body floor structure. 9. The lower end of the bulging portion of each of the reinforcing members by a propeller shaft drop-off mechanism which separates from the reinforcing member by a relative load of a predetermined value or more acting between the propeller shaft and the reinforcing member. The vehicle body floor structure according to claim 8, wherein the vehicle body floor structure is provided between the vehicle bodies. 10. The vehicle body according to claim 1, wherein the reinforcing member is spaced apart from a seat mounting seat bracket disposed on an upper surface of the floor surface in a plan view. Floor structure.