JP2011000956A - Lower vehicle body structure for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively reduce weight of a vehicle body, while securing the comfortability of an occupant seated on a front passenger seat.SOLUTION: This lower vehicle body structure of a vehicle is provided by juxtaposing at least a driver's seat 3 and the front passenger seat 4 in the vehicle width direction above a floor panel forming a bottom surface of a cabin, and has seat rails 9 for longitudinally movably supporting the driver's seat 3 and a front passenger seat support part composed of a second floor side part 8 supporting the front passenger seat 4 on the rear side from the forefront position of the driver's seat 3 supported by the seat rails 9.

Description

  The present invention relates to a lower body structure of a vehicle in which at least a driver seat and a passenger seat are arranged side by side in a vehicle width direction above a floor panel forming a bottom surface of a passenger compartment.

  Conventionally, as shown in Patent Document 1 below, in an open car or the like in which a roll bar is provided behind a driver seat and a passenger seat, the driver's seat along a seat rail installed on a floor panel in the passenger compartment As the seat is slidably supported, the front and rear positions of the driver's seat can be adjusted according to the driver's physique, and, like this driver's seat, the seat rail installed on the floor panel The passenger seat is slidably supported along the seat.

Japanese Patent Laid-Open No. 2005-186741

  As disclosed in Patent Document 1, when the passenger seat is supported so as to be slidable in the front-rear direction of the vehicle in the same manner as the driver seat, it is seated on the passenger seat by adjusting its front-rear position. There is an advantage that the occupant's habitability can be secured. On the other hand, in order to ensure the safety of passengers seated in the driver's seat and passenger seat, it is necessary to form the seat rails that support the driver's seat and passenger seat with stubborn members. There was a problem that it was difficult to make it.

  The present invention has been made in view of the above problems, and provides a lower vehicle body structure of a vehicle that can effectively reduce the weight of the vehicle body while ensuring the comfortability of an occupant seated on the occupant seat. The purpose is to do.

  According to a first aspect of the present invention, there is provided a lower body structure of a vehicle in which at least a driver seat and a passenger seat are juxtaposed in a vehicle width direction above a floor panel forming a bottom surface of a passenger compartment. A seat rail that is movably supported in the front-rear direction, and a passenger seat support portion that supports the passenger seat at the rear side of the frontmost position of the driver seat supported by the seat rail.

  According to a second aspect of the present invention, in the lower body structure of the vehicle according to the first aspect, the front passenger seat is fixed to the front passenger seat support.

  According to a third aspect of the present invention, in the lower body structure of the vehicle according to the second aspect, the fixing position of the passenger seat is at the rearmost position of the driver seat supported by the seat rail so as to be movable back and forth. Correspondingly set.

  According to a fourth aspect of the present invention, in the lower body structure of the vehicle according to any one of the first to third aspects of the present invention, the lower part of the passenger seat is above the installation part of the driver seat. A raised portion is provided, and the raised portion constitutes a passenger seat support portion that supports the passenger seat.

  According to a fifth aspect of the present invention, in the lower body structure of the vehicle according to the fourth aspect of the present invention, a tunnel portion that bulges toward the vehicle interior side and extends in the front-rear direction of the vehicle is formed at the vehicle width direction central portion of the floor panel. In addition to being provided, the inner end of the stepped-up portion in the vehicle width direction is connected to the tunnel portion.

  According to a sixth aspect of the present invention, in the lower body structure of the vehicle according to the fifth aspect of the invention, the raised portion has a closed cross section extending in the vehicle width direction between the raised portion and the raised portion. A cross member whose inner end in the vehicle width direction is connected to the tunnel portion is provided.

  In the invention according to claim 1, since the passenger seat is supported on the rear side of the foremost position of the driver seat supported by the seat rail, the same length as the driver seat is formed by a strong member. Compared to a vehicle in which the passenger seat is configured to be movable back and forth with the seat rail formed on the side, the vehicle body can be reduced in weight, and the material cost of the vehicle can be saved and the manufacturing cost can be kept low. it can. Moreover, since a wide space can be secured in front of the passenger seat, not only when a small occupant sits on the passenger seat, but also when a large occupant sits on the passenger seat. However, there is an advantage that a good space can be obtained by securing a wide space on the front side.

  In the invention according to claim 2, since the passenger seat is fixed to the passenger seat support portion, there is an advantage that the structure of the passenger seat support portion can be simplified and the vehicle weight can be more effectively reduced.

  In the invention according to claim 3, since the fixing position of the passenger seat is set to the rearmost part of the passenger compartment corresponding to the rearmost position of the driver seat, the front seat of the passenger seated in the passenger seat is The space provided can be maximized.

  In the invention according to claim 4, a stepped-up portion that is raised upward as compared to the installation portion of the driver seat is provided in a lower portion of the passenger seat, and the passenger seat is supported on the raised portion. Therefore, the passenger's seat has a simple structure without forming the seat cushion of the passenger's seat thicker than necessary and providing a bracket for fixing the seat cushion to the raised portion. Is properly installed, and the upper surface position of the seat cushion of the passenger seat can be installed at the same height as the seat cushion of the driver seat.

  In the invention according to claim 5, since the inner end portion in the vehicle width direction of the step-up portion is connected to the tunnel portion provided in the center portion in the vehicle width direction of the floor panel, the step-up portion serving as the installation portion of the passenger seat Is effectively reinforced, and the support rigidity of the passenger seat can be sufficiently secured with a simple configuration.

  In the invention which concerns on Claim 6, while installing the cross member extended in a vehicle width direction along the lower surface of the said raising part, while forming a closed cross section between this cross member and the said raising part, the said Since the inner end portion of the cross member in the vehicle width direction is connected to the tunnel portion, the raised portion is more effectively reinforced by the cross member to further improve the support rigidity of the passenger seat. In addition, the torsional rigidity and the like of the vehicle body can be effectively improved by connecting the tunnel portion and the left and right side sills through the cross member.

It is a top view which shows schematic structure of the vehicle provided with the lower vehicle body structure which concerns on this invention. It is front sectional drawing which shows the installation state of a driver seat and a passenger seat. It is side surface sectional drawing which shows the installation state of a passenger seat. It is side surface sectional drawing which shows the installation state of a driver's seat. It is a top view which shows the state which moved the driver's seat sheet ahead. It is a perspective view which shows the specific structure of a roll bar and a seat back frame. FIG. 4 is a view corresponding to FIG. 3 showing another embodiment of the lower body structure according to the present invention. It is a rear view which shows the installation state of the passenger seat in the said embodiment.

  1 to 5 show an embodiment of a lower body structure of a vehicle according to the present invention. The vehicle according to the present embodiment is a two-theta type in which a driver's seat 3 and a passenger seat 4 are arranged side by side on a floor panel 2 in the passenger compartment 1 without a roof panel and pillars that support the roof panel. It consists of an open car. A pair of left and right side sills 5 extending in the front-rear direction of the vehicle are disposed on the left and right sides of the floor panel 2, and at the center of the floor panel 2 in the vehicle width direction, inside the vehicle compartment 1 (upward) The tunnel portion 6 protruding toward the vehicle is installed so as to extend in the front-rear direction of the vehicle.

  In the vehicle compartment 1, first and second floor panel side portions 7 and 8 are formed by raising the rear portion of the floor panel 2 so as to be positioned above the front portion. End portions are connected to both side portions of the tunnel portion 6 in the vehicle width direction. In the present embodiment, the driver's seat 3 is supported by the seat rail 9 so as to be movable back and forth on the first floor panel side portion 7 located on the left side of the vehicle. The passenger seat 4 is directly fixed on the second floor panel side portion 8 that is positioned on the right side of the vehicle and raised above the first floor panel side portion 7. ing.

  That is, the second floor panel side portion 8 to which the passenger seat 4 is directly fixed is the first floor at a distance corresponding to the vertical dimension of the seat rail 9 supporting the driver seat 3 and its mounting bracket. The second floor panel 8 is disposed at a position higher than the first floor panel 1 by setting the amount of step-up upward from the panel side portion 7. The second floor panel side portion 8 constituting the raised portion constitutes a passenger seat support portion that supports the passenger seat 4.

  A cross member 11 that forms a closed cross-section 10 with the second floor panel side portion 8 is provided at a front portion of the lower surface of the stepped portion including the second floor panel side portion 8 so as to extend in the vehicle width direction. In addition, the inner end portion in the vehicle width direction is connected to the tunnel portion 6. Further, a rear floor panel 13 constituting the bottom surface of the rear cargo compartment is connected to the rear side of the first floor panel side portion 7 and the second floor panel side portion 8 via a kick-up portion 12. A rear cross member 15 that forms a closed cross-section 14 extending in the vehicle width direction is disposed at the lower front portion of the rear floor panel 13. Further, as shown in FIG. 6, the front end of the kick-up portion 12 has rear end portions of a pair of left and right tunnel members 16, 16 installed so as to extend in the front-rear direction along the upper surface of the tunnel portion 6. It is connected.

  As shown in FIG. 4, the driver seat 3 includes a seat cushion 17 supported so as to be slidable in the front-rear direction of the vehicle along the seat rail 9 installed on the first floor panel side portion 7, and thereafter A seat back 18 erected at the end, and a reclining mechanism 19 attached to the side surface of the rear end of the seat cushion 17 so as to tiltably support the seat back 18 are provided. Then, by slidingly displacing the seat cushion 17 along the seat rail 9, as shown in FIG. 5, the driver's seat 3 is moved from the foremost position close to the steering wheel 20 and the instrument panel 21. As shown in FIG. 1, it is configured to be movable back and forth to the rearmost position close to the kick-up portion 12 of the floor panel 2.

  On the other hand, as shown in FIG. 3, the passenger seat 4 is erected upward from a seat cushion 22 placed and fixed on the second floor panel side portion 8 and a rear end portion of the seat cushion 22. The seat back 24 is fixed to the vehicle body via a roll bar 23 made of a round pipe material or the like. The fixing position of the passenger seat 4 is the rear side of the frontmost position of the driver seat 3, specifically, the rearmost position of the driver seat 3 supported by the seat rail 9 so as to be movable back and forth. The part corresponding to the position is set.

  As described above, the seat cushion 22 and the seat back 24 of the passenger seat 4 are fixedly supported at a position close to the kick-up portion 12 provided at the rear end portion of the floor panel 2. The forefront of the driver's seat 3 supported by the seat rail 9 so as to be movable back and forth while the seat cushion 22 is prevented from moving back and forth and the seat back 24 is prevented from being tilted and displaced. The passenger seat 4 is supported by the vehicle body on the rear side of the position.

  The roll bar 23 includes, as shown in FIGS. 2 and 6, etc., a vertical member 25 installed so as to extend vertically between the driver seat 3 and the passenger seat 4 in a front view, An oblique member 26 extending obliquely downward from the upper end portion toward the seat back frame 24 of the passenger seat 4. The vertical member 25 of the roll bar 23 is bolted to the upper surface of the front end of the rear floor panel 13 with the mounting bracket 27 provided at the lower end thereof reinforced by the rear cross member 15. It is fixed to the car body. The front end portion of the oblique member 26 is introduced into the seat back 24 of the passenger seat 4 and is fixed to the upper member 31 of the seat back frame 28 described below.

  The seat back frame 28 of the passenger seat 4 includes an upper member 31 extending in the vehicle width direction along the upper side portion of the seat back 24 formed by bending a round pipe material or the like, and an outer side portion of the seat back 24. And a side member 32 extending vertically. The side member 32 is fixed to the upper surface of the rear portion of the second floor panel side portion 8 via a mounting bracket 30 provided at the lower end portion thereof (see FIG. 3). Further, the upper member 31 is led to the outside of the seat back 24 and joined to the intermediate portion in the vertical direction of the vertical member 25 of the roll bar 23, so that the roll bar 23 It is fixed to the upper surface of the front end portion of the rear floor panel 13 via a vertical member 25.

  As shown in FIG. 5, an instrument panel 21 extending in the vehicle width direction along the front surface of the passenger compartment 1 is disposed in front of the driver seat 3 and the passenger seat 4. Further, in the present embodiment, the right side portion 21b of the instrument panel 21 located on the front side of the passenger seat 4 is offset to the rear side of the vehicle from the left side portion 21a located on the front side of the driver seat 3. It is arranged in a state.

  In the lower body structure of the vehicle in which the driver seat 3 and the passenger seat 4 are juxtaposed in the vehicle width direction above the floor panel 2 forming the bottom of the passenger compartment as described above, the driver seat 3 is A passenger seat comprising a seat rail 9 that is movably supported and a second floor panel side portion 8 that supports the passenger seat 4 on the rear side of the frontmost position of the driver seat 3 supported by the seat rail 9. Since the support portion is provided, there is an advantage that the weight of the vehicle body can be effectively reduced while ensuring the comfortability of the occupant seated on the passenger seat 4.

  That is, in the above-described embodiment, the passenger seat 4 is fixed to the passenger seat support portion including the second floor side portion 8 disposed in the rear portion of the floor panel 2. Compared to a vehicle in which the passenger seat 4 is configured to be movable back and forth by a seat rail formed to a predetermined length with a strong member, the seat rail for the passenger seat 4 is omitted, and the vehicle body is increased accordingly. The weight can be reduced, and the material cost can be saved to reduce the manufacturing cost.

  Moreover, when the passenger seat 4 is supported by the seat rail so as to be movable back and forth, it is necessary to devise a layout to avoid interference with the vehicle body when the passenger seat 4 is moved back and forth. When the passenger seat 4 is fixed to the second floor side portion 8 as described above, the installation space of the second floor portion side portion 8 can be utilized to the maximum extent. Therefore, for example, as shown in FIG. 5, there is an advantage that a wide seating space can be secured by forming a bulging portion 27 a bulging outward on the side portion of the seat cushion 27.

  In the above-described embodiment, the position at which the passenger seat 4 is fixed corresponds to the rearmost position of the driver's seat 3 that is supported by the seat rail 9 so as to be movable back and forth. Therefore, the space provided on the front side of the passenger seated on the passenger seat 4 can be maximized. Therefore, not only when an occupant with a small physique sits on the passenger seat 4, but also when an occupant with a large physique sits on the passenger seat 4, a large space is secured on the front side of the occupant for good comfort. There is an advantage that can be obtained.

  Further, according to the configuration in which the passenger seat 4 is fixed to the rearmost part in the passenger compartment 1 as described above, the instrument panel 21 positioned on the front side of the passenger seat 4 as shown in FIG. Even when the right side portion 21b is offset to the rear side of the vehicle with respect to the left side portion 21a of the instrument panel 21 located in front of the driver seat 3, sufficient space is provided on the front side of the passenger seat 4 Can be secured. Therefore, there is an advantage that the front portion of the right dash side portion 35 can be effectively used as an installation space for the air conditioning unit without impairing the comfortability of the passenger seated on the passenger seat 4.

  As described above, the seat rail 9 is disposed between the seat cushion 17 of the driver's seat 3 and the first floor panel side portion 7, and the seat cushion 22 of the passenger seat 4 is connected to the second floor panel side portion. When the first floor panel side portion 7 and the second floor panel side portion 8 are set at the same height in the lower vehicle body structure of the vehicle supported by being directly fixed to 8, the seat rail 9 The seat cushion 22 of the passenger seat 4 is formed thicker than the seat cushion 17 of the driver seat 3 corresponding to the thickness, or between the seat cushion 22 of the passenger seat 4 and the second floor panel side portion 8. If a means such as arranging a bracket having a vertical dimension corresponding to the thickness of the seat rail 9 is not taken, the upper surface position of the seat cushion 22 of the passenger seat 4 is Inevitably it is in a state of being located below the seat cushion 17 of Utateseki sheet 3.

  On the other hand, as shown in FIG. 2, the stepped-up portion comprising the second floor panel side portion 8 disposed above the first floor panel side portion 7 serving as the installation portion of the driver seat 3 is When the passenger seat 4 is provided below the passenger seat 4 and is supported on the second floor panel side portion 8, the seat cushion 22 of the passenger seat 4 is thicker than necessary. The front passenger seat 4 can be appropriately installed with a simple configuration without the need of forming a bracket or a bracket for fixing the seat cushion 22 to the second floor side 8. There is an advantage that the upper surface position of the seat cushion 22 can be installed at substantially the same height as the seat cushion 17 of the driver's seat 3.

  Further, as shown in the above-described embodiment, in the lower vehicle body structure of the vehicle in which the tunnel portion 6 that bulges toward the vehicle interior side and extends in the front-rear direction of the vehicle is provided in the vehicle width direction center portion of the floor panel 2, 6, the second floor panel side portion 8 serving as the installation portion of the passenger seat 4 is connected to the tunnel portion. 6 can be effectively reinforced, so that the support rigidity of the passenger seat 4 can be sufficiently secured with a simple configuration.

  In particular, in the above-described embodiment, by installing the cross member 11 extending in the vehicle width direction along the lower surface of the stepped up portion formed by the second floor panel side portion 8, the space between the cross member 11 and the stepped up portion is set. The cross section 11 is formed with a closed cross-section 10 and the inner end portion in the vehicle width direction of the cross member 11 is connected to the tunnel portion 6. Therefore, the cross member 11 makes the second floor panel side portion 8 more effective. Thus, the support rigidity of the passenger seat 4 can be further improved. Moreover, there is an advantage that the torsional rigidity and the like of the vehicle body can be effectively improved by connecting the tunnel portion 6 and the left and right side sills 5 via the cross member 11.

  In the above embodiment, the fixing position of the passenger seat 4 is set to the rearmost part in the passenger compartment 1 that is the rearmost position of the driver seat 3 supported by the seat rail 9 so as to be movable back and forth. However, various modifications can be made without being limited to the above-described embodiment as long as it is on the rear side of the frontmost position in the front-rear movement range of the driver seat 3. For example, the front and rear reference position of the driver seat 3 may be virtually set as a position suitable for driving by a driver having an average height, and the passenger seat 4 may be fixed corresponding to this position. In this configuration, when a driver having a physique equivalent to an average height person sits on the driver's seat 3, the driver's seat 3 and the passenger seat 4 are arranged side by side on the left and right sides. Therefore, communication between the driver and an occupant seated on the passenger seat 4 can be performed closely.

  Further, in place of the above-described embodiment in which the passenger seat seat 4 is fixed to the passenger seat support portion comprising the second floor side portion 8, the passenger seat has a shorter front and rear length than the seat rail 9 for the driver seat 3. By installing a passenger seat support portion comprising a seat rail for the seat 4 on the floor panel 2 in the passenger compartment 1, the above-mentioned position is set behind the frontmost position of the driver seat 3 supported by the seat rail 9. It is good also as a structure which supported front passenger seat 4 so that front-back movement was possible. In this way, when the seat rail for the passenger seat 4 is made shorter than the seat rail 9 for the driver seat 3 and the range of front and rear movement of the passenger seat 4 is limited compared to the driver seat 3. The vehicle body is lighter than the case where the seat rail for the passenger seat 4 and the seat rail 9 for the driver seat 3 are formed to the same length without impairing the comfortability of the passenger sitting on the passenger seat 4 There is an advantage that can be made.

  And as shown in the said embodiment, while fixing the front passenger seat 4 to the rearmost part in the passenger compartment 1 which is the rearmost position of the driver's seat 3 supported by the seat rail 9 so as to be movable back and forth, The seat back frame 28 disposed in the seat back 24 of the passenger seat 4 and the roll bar 23 disposed between the driver seat 3 and the passenger seat 4 in a front view are connected to each other. When configured, the roll back 23 can effectively reinforce the seat back frame 28 and the seat back 24 with a simple configuration. Accordingly, the safety of effectively restraining the passenger seated on the passenger seat 4 can be sufficiently secured, and the rigidity of the roll bar 23 can be sufficiently improved to effectively protect the passenger when the vehicle rolls over. There is an advantage.

  In the above embodiment, the side member 32 constituting the seat back frame 28 of the passenger seat 4 is attached to the upper surface of the rear portion of the second floor panel side portion 8 via the mounting bracket 30 provided at the lower end portion thereof. Although the fixed example has been described, the present invention is not limited to this configuration, and various modifications are possible. For example, as shown in FIGS. 7 and 8, the lower part of the side member 32 installed so as to extend in the vertical direction along the outer side part of the seat back 24 of the passenger seat 4 is attached to the outside of the seat back 24. The rear floor panel 13, which is reinforced by the rear cross member 15 in the same manner as the vertical member 25 of the roll bar 23, is led out (downward) and is attached through a mounting bracket 33 provided at the lower end of the side member 32. It is good also as a structure fixed to the vehicle body by bolting to the upper surface of the front-end part.

  Further, in the above embodiment, the two-seater type in which only the driver's seat 3 and the passenger's seat 4 are installed on the floor panel 2 in the passenger compartment 1 is used for an open car without a roof panel and a pillar that supports the roof panel. Although the example to which the invention is applied has been described, the present invention is not limited thereto, and the present invention can be applied to a vehicle or a roof panel having a rear row seat and a normal passenger car having a pillar supporting the same.

1 Car compartment 2 Floor panel 3 Driver's seat 4 Passenger seat 6 Tunnel part 8 Second floor side (step up part)
9 Seat rail 10 Closed section 11 Cross member

Claims (6)

  A seat rail that supports the driver's seat so that the driver's seat can be moved back and forth in a vehicle lower body structure in which at least a driver's seat and a passenger's seat are juxtaposed in the vehicle width direction above a floor panel that forms the bottom of the passenger compartment And a passenger seat support portion for supporting the passenger seat on the rear side of the frontmost position of the driver seat supported by the seat rail.   The lower body structure of a vehicle according to claim 1, wherein the passenger seat is fixed to a passenger seat support portion.   The lower body structure of a vehicle according to claim 2, wherein a fixed position of the passenger seat is set corresponding to a rearmost position of a driver seat supported by the seat rail so as to be movable back and forth. .   A lower part of the passenger seat is provided with a raised part that is raised upward compared to the installation part of the driver seat, and the raised part constitutes a passenger seat support part that supports the passenger seat. The lower body structure of a vehicle according to any one of claims 1 to 3, wherein the lower body structure is a vehicle.   A tunnel portion that bulges toward the vehicle interior side and extends in the front-rear direction of the vehicle is provided at the center portion in the vehicle width direction of the floor panel, and the inner end portion in the vehicle width direction of the raised portion is connected to the tunnel portion. The vehicle lower body structure according to claim 4, wherein   The raised portion has a closed cross section extending in the vehicle width direction between the raised portion and a cross member having an inner end in the vehicle width direction connected to the tunnel portion. The lower body structure of a vehicle according to claim 5, wherein the lower body structure is a vehicle body structure.

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