JP2009280051A - Seat structure for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat structure for a vehicle capable of sufficiently exhibiting an injury value reduction action of a forward movement suppression member by suppressing forward movement of a seat cushion in a collision of the vehicle. <P>SOLUTION: The seat structure for the vehicle has: a seat belt device B including a wrap belt B1a; a submarine suppression bar 3 for suppressing forward movement of an occupant C in a collision of the vehicle; and a wire frame 24 for restricting movement of the submarine suppression bar 3 to a front side of the vehicle. The submarine suppression bar 3 is installed at the inside of the seat cushion 21 so as to be extended in a vehicle width direction. The wire frame 24 is provided so as to substantially fix a position of the submarine suppression bar 3 in the seat cushion 21 in a collision of the vehicle, thereby restricting the movement of the submarine suppression bar 3 to a front side of the vehicle. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a vehicle seat structure including a seat cushion mounted on a vehicle body floor and having a cushion pad, a seat back coupled to the seat cushion, and a seat belt device for restraining a seated occupant.

  Conventionally, when the upper body is restrained by a seat belt while seated on the seat, when a vehicle collision occurs, the passenger's chest is tightened by the seat belt as the passenger is pushed forward by inertial force. It is a problem.

  Therefore, in order to prevent the occupant from moving forward in the event of a vehicle collision, it has been proposed to provide a forward movement suppressing member extending in the vehicle width direction in the seat cushion (see Patent Documents 1 and 2).

  In this case, when the vehicle collides, the forward movement of the seated occupant (particularly the waist) can be restricted by the forward movement restraining member, and the impact during the forward movement can be absorbed. It is possible to reduce the injury value.

  In the following Patent Document 1, a reinforcing plate that protrudes from the upper surface of the engine cover in a substantially mountain shape is provided in correspondence with the seat disposed on the engine cover of the cab-over type vehicle, and this is protruded toward the seat cushion side. Are disclosed. Due to the protrusion of the reinforcing plate, it is possible to restrict the forward movement of the seated occupant during a vehicle collision.

Further, Patent Document 2 discloses a seat cushion in which a rod-like submarine suppressing mechanism extending in the vehicle width direction with respect to a cushion frame is attached. In this case, the submarine restraining mechanism as the forward movement restraining member is attached not to the vehicle body floor side but to the seat side (seat cushion), so that when the seat cushion is attached to the vehicle body floor, the presence of the forward movement restraining member is considered. There is also an effect that the mounting operation can be easily performed.
Japanese Patent Laid-Open No. 2001-233101 JP 2000-103273 A

  However, none of the conventional techniques disclosed in Patent Documents 1 and 2 regulates the forward movement of the seat cushion. In this case, in the event of a vehicle collision, if the seat cushion moves forward relative to the vehicle body even if the forward movement restraining member attempts to restrict the forward movement of the occupant, the lower body of the occupant eventually moves forward due to the seat cushion. Therefore, the damage value reducing action by the forward movement suppressing member is not sufficiently exhibited.

  An object of the present invention is to provide a vehicle seat structure capable of sufficiently exerting an injury value reducing action of a forward movement suppressing member by suppressing forward movement of a seat cushion at the time of a vehicle collision. .

  A vehicle seat structure according to the present invention includes a seat cushion mounted on a vehicle body floor and having a cushion pad, a seat back coupled to the seat cushion, and a seat belt device for restraining a seated occupant. The seatbelt device has a structure, and includes a forward movement suppressing member that suppresses forward movement of an occupant in the event of a vehicle collision, and a movement restricting member that restricts forward movement of the forward movement suppressing member. Includes a lap belt, and the forward movement restraining member is installed in the seat cushion so as to extend in the vehicle width direction, and the movement restricting member is provided in the seat cushion of the forward movement restraining member in the event of a vehicle collision. Is provided so as to substantially fix the position in the vehicle, thereby restricting the movement of the forward movement suppressing member to the front of the vehicle. That.

  According to this configuration, the forward movement suppressing member is fixed to the movement restricting member, so that, in the event of a vehicle collision, the forward movement of the occupant is suppressed by the forward movement suppressing member, and the forward movement suppressing member is caused by the load of the occupant. Movement to the front of the vehicle can be restricted by the movement restricting member. Therefore, the forward movement of the occupant can be more reliably suppressed by the cooperation of the forward movement suppressing member and the movement restricting member, and the injury value given to the occupant by tightening the seat belt can be further reduced.

  Furthermore, the forward movement suppressing member is fixed to the movement restricting member, so that the seat cushion can be prevented from moving forward in the event of a vehicle collision. For this reason, it can prevent that a passenger | crew's lower body is carried forward by the seat cushion, and the front movement suppression member can fully exhibit the injury value reduction effect | action.

  Furthermore, by installing the forward movement restraining member in the seat cushion, when attaching the seat cushion to the vehicle body floor, it is possible to easily perform the attaching work without worrying about the presence of the forward movement restraining member.

  Furthermore, since the forward movement suppressing member can function as a seat cushion reinforcing member extending in the vehicle width direction, the rigidity of the seat cushion can be improved together with the movement restricting member.

  In one embodiment of the present invention, the movement restricting member is a seat cushion reinforcing member, and the front movement suppressing member is fixed to the seat cushion reinforcing member in the seat cushion.

  According to this configuration, since the forward movement suppressing member is fixed to the seat cushion reinforcing member, it is not necessary to provide new fixing means for fixing the forward movement suppressing member. Furthermore, by fixing the forward movement suppressing member to the reinforcing member, the occupant's forward movement suppressing action can be improved.

  In one embodiment of the present invention, the seat cushion reinforcing member is fixed to the vehicle body.

  According to this configuration, the forward movement restraining member and the occupant can be prevented from moving forward more reliably, and the forward movement of the seat cushion can be more reliably suppressed.

  In one embodiment of the present invention, the seat cushion reinforcing member is a wire member provided in the seat cushion, and the wire member is connected to the vehicle body on the rear side of the seat cushion, and the connection The forward movement suppression member is connected to the vehicle upper side of the portion of the wire that extends forward from the connection position.

  According to this configuration, even if a load acts on the wire or the forward movement suppressing member at the time of a vehicle collision, the forward movement of these can be more reliably suppressed by fixing on the rear side of the seat cushion.

  In one embodiment of the present invention, the movement restricting member is a protruding member that protrudes from the vehicle body floor in front of the vehicle relative to the forward movement suppressing member.

According to this configuration, when a vehicle collision occurs, the forward movement suppressing member comes into contact with the protruding member, whereby the forward movement of the seat cushion, and thus the forward movement of the occupant can be suppressed.
Furthermore, by providing the movement restricting member not on the seat cushion side but on the vehicle body side, the configuration on the seat side can be simplified.

  In one embodiment of the present invention, the protruding member is fixed to a reinforcing member of a vehicle body.

  According to this configuration, by fixing the protruding member to the reinforcing member of the vehicle body, the forward movement of the protruding member can be reliably suppressed, and as a result, the forward movement of the seat cushion and the occupant can be more reliably suppressed.

  In one embodiment of the present invention, the forward movement suppressing member is a submarine preventing member formed in a long shape.

  According to this configuration, in the event of a vehicle collision, the submarine phenomenon in which the lower body of the passenger restrained by the seat belt device moves forward by inertia force and slips between the seat cushion and the seat belt device is effectively suppressed. Can do.

  According to the present invention, the forward movement suppressing member is fixed to the movement restricting member, so that, in the event of a vehicle collision, the forward movement of the occupant is suppressed by the forward movement suppressing member, and the forward movement suppressing member is caused by the load of the occupant. Movement to the front of the vehicle can be restricted by the movement restricting member. Therefore, the forward movement of the occupant can be more reliably suppressed by the cooperation of the forward movement suppressing member and the movement restricting member, and the injury value given to the occupant by tightening the seat belt can be further reduced.

  Furthermore, the forward movement suppressing member is fixed to the movement restricting member, so that the seat cushion can be prevented from moving forward in the event of a vehicle collision. For this reason, it can prevent that a passenger | crew's lower body is carried forward by the seat cushion, and the front movement suppression member can fully exhibit the injury value reduction effect | action.

  Furthermore, by installing the forward movement restraining member in the seat cushion, when attaching the seat cushion to the vehicle body floor, it is possible to easily perform the attaching work without worrying about the presence of the forward movement restraining member.

  Furthermore, since the forward movement suppressing member can function as a seat cushion reinforcing member extending in the vehicle width direction, the rigidity of the seat cushion can be improved together with the movement restricting member.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(First embodiment)
First, the first embodiment shown in FIGS. 1 to 6 will be described. FIG. 1 is a side sectional view showing a seat structure of a rear seat according to the present embodiment, and FIG. 2 is a transparent plan view showing a wire frame and a submarine restraining bar built in the seat cushion of the rear seat shown in FIG. 3 is an enlarged side view showing a fixed state of the submarine deterrence bar, and FIG. 4 is a perspective view around the lock portion of the wire frame. In the figure, the arrow (F) indicates the front of the vehicle, and the arrow (R) indicates the rear of the vehicle.

  Of the floor panels 1 constituting the floor of the passenger compartment, the floor panel rear 11 constituting the rear floor of the passenger compartment is provided with a horizontally long bench seat as the rear seat 2. The rear seat 2 includes a seat cushion 21 placed on the floor panel rear 11 (vehicle body) and a seat back 22 connected to the seat cushion 21 and supporting the occupant C from behind so that the occupant C can sit there. The seat cushion 21 includes a foamed resin pad 23 that forms a seat portion, and a metal wire frame 24 for reinforcing the seat cushion 21 is embedded in the pad 23.

  Of the floor panel 1, a floor panel front (not shown) constituting a front floor portion of the passenger compartment in front of the floor panel rear 11 has a driver seat and a passenger seat with adjustable front and rear positions as front seats. Side by side. In the present embodiment, only the rear seat 2 will be described, and illustration and detailed description of the front seat will be omitted.

  The floor panel rear 11 is provided with a service cover 12 as shown in FIGS. 1 and 2 corresponding to the position below the seat cushion 21, and the service cover 12 is a bolt 13 (see FIG. 2). As a result of being fastened to the floor panel rear 11, the opening 11a formed in the floor panel rear 11 is covered with the service cover 12.

  In the present embodiment, the fuel tank 14 is accommodated in a space below the floor panel rear 11 at a position corresponding to the opening 11a. The fuel tank 14 can be accessed from the opening portion 11a to perform maintenance work by removing the bolt 13 and removing the service cover 12.

  By the way, in the rear seat 2 according to the present embodiment, the wire frame 24 of the seat cushion 21 is mainly composed of five different shapes of the first wire 25 to the fifth wire 29 as shown in FIG. It is assembled symmetrically into a frame shape. In the present embodiment, at the intersection where the wires cross each other, the wires are joined and integrated by a technique such as welding.

  The first wire 25 has a shape that extends substantially in the vehicle front-rear direction, and its rear part belongs to the rear lock part 31 and its front part belongs to the front lock part 32, as will be described in detail later.

  The second wire 26 includes a front / rear extension 26a that extends long in the front / rear direction inside the first wire 25, and a vehicle width direction in which a front end portion of the front / rear extension 26a is bent outwardly and extends short in the vehicle width direction. The extension part 26b and the side part formation part 26c which the outer end part of the vehicle width direction extension part 26b is bent in three stages to form the side part of the wire frame 24 and reach the rear end part are included. .

  The third wire 27 extends in the vehicle width direction at the center front portion of the seat cushion 21, and both end portions thereof intersect and are coupled to the longitudinal extension portion 26 a of the second wire 26 and the first wire 25.

  The fourth wire 28 and the fifth wire 29 constitute the rear edge of the wire frame 24. The fourth wire 28 having a U-shape in plan view is disposed at the center rear portion of the seat cushion 21, and the fifth wire 29 having a crank shape in plan view intersects and is coupled to the fourth wire 28, the second wire 26, and the first wire 25. ing.

  In addition, as shown in FIGS. 2 and 3, the front and rear direction extending portions 25a and 26a and the side portion forming portion 26c of the first and second wires 25 and 26 are respectively directed forward at a substantially central portion in the front and rear direction. Inclined portions 25b and 26d that are inclined obliquely upward, and upright portions 25c and 26e that extend directly from the front ends of the inclined portions 25b and 26d are formed. A long submarine suppression bar 3 is fixed so as to extend in the vehicle width direction.

  Further, as shown in FIG. 1, the rear seat 2 is provided with a seat belt device B, which restrains an occupant C seated on the rear seat 2. In the seat belt device B, the seat belt B1 includes a lap belt B1a, which restrains the occupant's C waist. Both ends of the lap belt B1a are connected to the vehicle body structure around the rear portion of the seat cushion 21 while the occupant C is restrained.

  Here, the submarine deterrence bar 3 restricts the occupant C from moving forward by inertial force due to the impact in the event of a frontal collision of the vehicle, and thereby, between the seat cushion 21 and the seat belt B1. This makes it possible to suppress the so-called submarine phenomenon that the occupant C slips through.

  In the present embodiment, the coupling brackets 4 and 4 provided corresponding to the top portions 25d and 26f of the first and second wires 25 and 26 are coupled in the vicinity of the top portions 25d and 26f so as to sandwich the submarine suppression bar 3. . For this reason, the submarine deterrence bar 3 is connected to the wire frame 24 on the upper side of the front-rear direction extending portions 25a and 26a and the side portion forming portion 26c, and is fixed at an appropriate position in the seat cushion 21, which will be described later.

  By the way, the seat back 22 is assembled to the floor panel rear 11 via a hinge bracket (not shown), and the seat cushion 21 is fixed to the floor panel rear 11 at the rear lock portion 31 and the front lock portion 32. ing.

  Here, the fixing of the seat cushion 21 will be described in detail. The first wire 25 of the wire frame 24 has a downward projecting portion projecting downward from the lower surface of the pad 23 as shown in FIG. 25e is provided. The downward projecting portion 25e is formed by bending a part of the wire frame 24 into a substantially U shape when viewed from the front, and constitutes a rear lock portion 31.

  The rear end of the seat cushion 21 is fixed to the floor panel rear 11 (vehicle body) using the rear lock portion 31 and the resin clip 6 fixed below the rear end of the seat cushion 21 of the floor panel 11. .

  And the outer base part of the U-shaped two base parts of the downward protrusion part 25e of the 1st wire 25 is bent substantially forward, and the front back extension part 25a extended in a substantially vehicle front-back direction is formed.

  The first wire 25 is provided with a downward projecting portion 25f that projects downward from the lower surface of the pad 23 at the front portion in the vehicle longitudinal direction. The downward projecting portion 25f is formed by bending a part of the wire frame 24 in a substantially U shape in a front view like the downward projecting portion 25e, and has substantially the same configuration as the rear lock portion 31 shown in FIG. A front lock portion 32 is formed.

  The seat cushion 21 uses the front lock portion 32 and the resin clip 7 fixed in the vicinity of the kick-up portion 11b (see FIG. 1) of the floor panel rear 11, and the front end thereof is the floor panel rear 11 (vehicle body). ) Is installed.

  Moreover, in the 1st wire 25, the front extension part which the inner base part of the U-shaped two base parts of the downward protrusion part 25f of the 1st wire 25 is bent ahead, and extends ahead in the substantially vehicle front-back direction. 25g is formed, and the vehicle width direction extension portion 26b of the second wire 26 passes near the front of the downward projecting portion 25f. And the vehicle width direction extension part 26b of this 2nd wire 26 and the front extension part 25g of the 1st wire 25 cross | intersect the front vicinity of the downward protrusion part 25f, and it is couple | bonded and integrated at the intersection.

  Resin clips 6 and 7 for attaching the front and rear portions of the seat cushion 21 to the vehicle body are formed on the upper surface of the floor panel rear 11 immediately after the kick-up portion 11b and below the lower end portion of the seat back 22, respectively. Is fitted in the opening. Then, the lower protrusions 25e and 25f of the wire frame 24 protruding downward from the front lower surface and the rear lower surface of the foamed resin pad 23 are pushed into the resin clips 6 and 7 on the lower surface of the pad 23 and press-fitted. Yes.

  As a result, the forward movement of the wire frame 24 is restricted, and the position of the submarine deterrence bar 3 in the seat cushion 21 is substantially fixed in the event of a frontal collision of the vehicle.

  FIG. 5 is a side view showing a state where the dummy D seated on the rear seat 2 is constrained by the seat belt device B and an installation point of the submarine suppression bar 3 in an impact measurement experiment at the time of a vehicle front collision. FIG. 6 is a graph showing the result of measuring the injury value when an impact is applied to the chest corresponding portion of the dummy D by tightening the seat belt B1, and FIG. 6A shows the acceleration of the impact. FIG. 6B is a graph showing the result of measuring the amount of bending of the dummy D corresponding to the chest.

  FIG. 5 shows a dummy D simulating an adult occupant C having a standard body shape, and a point HP in the figure indicates a hip position that is an intermediate position between the left and right femoral heads of the occupant C seated on the seat cushion 2. Shows the point.

  The inventor conducted an experiment in which a dummy D serving as an occupant C is seated on the rear seat 2 and an impact at the time of a vehicle front collision is applied to the dummy D seated in a state of being restrained by the seat belt B1. Then, when the impact is applied to the dummy D, the impact applied to the part corresponding to the chest of the occupant C (hereinafter referred to as the chest equivalent part) by tightening the seat belt B1 is measured, and based on this measurement result The injury value given to the occupant C's chest was estimated. In the measurement experiments shown in FIGS. 5 and 6, the position of the submarine deterrence bar 3 in the seat cushion 21 is changed variously to change the impact applied to the chest D of the dummy D, that is, the injury value in the chest of the occupant C. Analysis of the change was performed.

  In FIG. 5, the installation point of the submarine deterrence bar 3 in the measurement experiment is indicated by a black dot, and the predetermined distances D1 to D5 (D1: (from the hip point HP) 25 mm, D2: 65 mm, from the hip point HP to the front of the vehicle) D3: 105 mm, D4: 145 mm, D5: 185 mm), and the installation point of the submarine deterrence bar 3 is set at a position spaced apart by a predetermined interval H1 to H3 (H1: 80 mm, H2: 100 mm, H3: 120 mm) below Is shown. That is, in the measurement experiments shown in FIGS. 5 and 6, the measurement was performed by setting the installation points of the submarine suppression bars 3 at a total of 15 locations.

  Further, in the above measurement experiment, appropriate sensor means is attached to the chest corresponding portion of the dummy D, and the acceleration of the impact applied to the chest corresponding portion of the dummy D and the deflection of the chest corresponding portion by tightening the seat belt B1 at the time of the vehicle front collision. The amount was measured, and these were used as a standard for determining the injury value.

  In FIG. 6, the submarine suppression bar 3 is set around the installation point of the interval D3-H1 (installation point 105 mm forward and 80 mm downward from the hip point HP) in both the acceleration of impact and the deflection amount. Sometimes low.

  As a result of earnest research, the present inventor, based on the measurement results shown in FIG. 6, in order to reliably suppress the forward movement of the occupant C by the submarine suppression bar 3 and reliably absorb the impact of the forward movement, It has been found that the positional relationship between the position of the submarine deterrence bar 3 and the hip point HP of the occupant C is extremely important. And when this inventor installs the submarine suppression bar 3 in the seat cushion 21 in the position spaced apart in the range of 0-160 mm ahead of the vehicle from the hip point HP, the forward movement suppression effect of the occupant C, and It has been found that the impact absorbing action (damage value reducing action) is effectively exhibited.

  Moreover, this inventor discovered that the said effect | action can be exhibited more effectively by setting the submarine suppression bar 3 in the position spaced apart in the range of 20-100 mm below the hip point HP within the said range. It was.

  In particular, according to the measurement results shown in FIG. 6, it is optimal to install the submarine deterrence bar 3 at a position spaced from the hip point HP by 25 to 150 mm, more preferably 80 to 120 mm, in front of the vehicle. It is optimal to install at a position 40 to 80 mm downward, more preferably 60 to 70 mm apart.

  Therefore, in the present embodiment shown in FIG. 1 and the like, based on the measurement results described above, the submarine suppression bar 3 is installed at an appropriate position within the above-described range, and the position where each measurement value is the lowest, that is, It is installed at an installation point separated from the hip point HP by a distance D3 forward of the vehicle and a distance H1 downward.

  For this reason, in this embodiment, since the forward movement of the occupant C can be suppressed by the submarine suppression bar 3 installed at the appropriate position at the time of a vehicle front collision, the submarine suppression bar 3 has a forward movement suppression effect, In addition, the impact absorbing function can be effectively exhibited, and the injury value given to the occupant C by tightening the seat belt B1 can be reduced.

  In addition, the pad 23 of the seat cushion 21 is interposed between the submarine deterrence bar 3 and the seated occupant C. This pad 23 reduces the instantaneous impact applied to the occupant's C waist. Can be done.

  Further, in the present embodiment, as a means for suppressing the forward movement of the occupant C, the lower body of the occupant C restrained by the seat belt device B is moved forward by inertial force by constituting the submarine deterrence bar 3. The submarine phenomenon that moves and slips between the seat cushion 21 and the seat belt device B can be effectively suppressed.

  Further, as described above, the submarine deterrence bar 3 is fixed to the wire frame 24 (see FIG. 1 and the like), so that the forward movement of the occupant C is suppressed by the submarine deterrence bar 3 at the time of a vehicle front collision or the like. The movement of the submarine deterrence bar 3 to the front of the vehicle by the load of the passenger C can be restricted by the wire frame 24. For this reason, the forward movement of the occupant C can be more reliably suppressed by the cooperation of the submarine suppression bar 3 and the wire frame 24, and the injury value given to the occupant C by tightening the seat belt B1 can be further reduced.

  Furthermore, by fixing the submarine deterrence bar 3 to the wire frame 24, it is possible to prevent the seat cushion 21 from moving forward in the event of a vehicle front collision. For this reason, it is possible to prevent the lower body of the occupant C from being moved forward by the seat cushion 21, and the submarine deterrence bar 3 can sufficiently exhibit the injury value reducing action.

  Furthermore, by installing the submarine deterrence bar 3 in the seat cushion 21, when the seat cushion 21 is attached to the floor panel 1, the submarine deterrence bar 3 can be easily attached without worrying about the presence of the submarine deterrence bar 3. There is also an effect that can be done.

  Furthermore, since the submarine suppression bar 3 can function as a seat cushion reinforcing member extending in the vehicle width direction, the rigidity of the seat cushion 21 can be improved together with the wire frame 24.

  Further, since the submarine suppression bar 3 is fixed to the wire frame 24 as a reinforcing member of the seat cushion 21, it is not necessary to provide a new fixing means for fixing the submarine suppression bar 3. Further, by fixing the submarine deterrence bar 3 to the reinforcing member, it is possible to improve the forward movement restraining action of the occupant C.

  Further, since the wire frame 24 is fixed to the floor panel rear 11 (vehicle body) at the front and rear lock portions 31 and 32, the submarine deterrence bar 3 and the occupant C can be prevented from moving forward more reliably, and the seat cushion 21. This can also be more reliably suppressed with respect to the forward movement.

  As shown in FIGS. 1 and 2, etc., the first and second wires 25 and 26 are fixed to the floor panel rear 11 at least on the rear side of the seat cushion 21 and extend forward. Since the submarine deterrence bar 3 is fixed at the appropriate position above the vehicle, even if a load acts on the wire frame 24 or the submarine deterrence bar 3 in the event of a frontal collision of the vehicle, the rear lock unit 31 The forward movement of the can be more reliably suppressed.

  Further, when the submarine deterrence bar 3 is disposed on the seat cushion 21, the service cover 12 is disposed below the seat cushion 21 to enable maintenance of the fuel tank 14 as in the present embodiment. Since the service cover 12 can be easily accessed simply by removing the seat cushion 21, maintenance work of the fuel tank 14 can be easily performed.

(Second Embodiment)
In the first embodiment shown in FIGS. 1 to 6, the inclined portions 25 b and 26 d and the upright portions 25 c and 26 e are integrally formed in the middle portion in the front-rear direction of the first and second wires 25 and 26 of the wire frame 24. However, the present invention is not necessarily limited to this. For example, like the wire frame 124 shown in FIG. 7, the first and second wires 125 and 126 are formed linearly in the front-rear direction, and a sixth wire 130 as a separate member is attached at an intermediate portion thereof. The restraining bar 3 may be fixed.

  The sixth wire 130 includes inclined portions 130a and upright portions 130b corresponding to the inclined portions 25b and 26d and the upright portions 25c and 26e of the first and second wires 25 and 26, and both the front and rear ends thereof are the first and second wires. 125 and 126 are connected by welding or the like.

  And the top part 130c is formed in the boundary part of the inclined part 130a of the 6th wire 130, and the upright part 130b, and the coupling bracket 104 provided corresponding to the top part 130c is combined in the vicinity of the top part 103c, The submarine deterrence bar 3 is fixed to the wire frame 124 at the top portion 130c, and is fixed to the appropriate position in the seat cushion 21.

  As described above, in the first and second embodiments, the wires 25 and 130 are provided with the inclined portions 25b and 130a, the upright portions 25c and 130b, and the inclined portions 25b and 130a and the upright portions 25c and 130b. For example, the submarine deterrence bar 3 is fixed at the appropriate position. In this case, the rigidity with respect to the load in the front-rear direction can be improved and the forward movement of the submarine suppression bar 3 can be more reliably suppressed as compared with the case where the submarine suppression bar 3 is fixed only by the inclined portion or the upright portion.

  In the first and second embodiments, the submarine deterrence bar 3 is fixed to the wire frames 24 and 124 using the coupling brackets 4 and 104, but both may be directly coupled by welding or the like.

  Moreover, when fixing the submarine suppression bar 3 to the reinforcement means for reinforcing the seat cushion 21, it is not necessarily limited to using this as the wire frame 24 or the like. For example, a seat frame or a seat pan may be used.

(Third embodiment)
In the first and second embodiments described above, the case where one long submarine deterrence bar 3 extending substantially straight in the vehicle width direction is used, but the present invention is not necessarily limited thereto. Instead of this, a submarine suppression bar may be arranged for each seat of the rear seat 2.

  In this case, for example, the submarine deterrence bars may be arranged so as to extend substantially straight in the vehicle width direction, and correspond to the left and right seats of the rear seat 2 like the submarine deterrence bars 203, 203,... Shown in FIG. Then, each of the two submarine suppression bars 203 may be arranged, and in each seat, the pair of submarine suppression bars 203 may be arranged so that the distance from each other gradually decreases toward the front.

  In FIG. 8, a pair of submarine deterrence bars 203 are arranged so as to draw a substantially C shape in plan view, and each submarine deterrence bar 203 is firmly fixed to the wire frame 24 by a coupling bracket 204 at a plurality of locations. Has been.

  In this way, the pair of submarine deterrence bars 203 are arranged so that the distance between them gradually decreases toward the front, so that the front end of the submarine deterrence bar 203 whose distance is narrowed at the time of a vehicle front collision or the like. It is possible to reliably prevent the occupant C from moving forward at the waist. Moreover, in this case, the position of the occupant C in the vehicle width direction of the waist can be regulated, and this can be reliably guided to the front end where the distance is narrowed.

(Fourth embodiment)
In the first and second embodiments described above, the submarine deterrence bar 3 is configured to be fixed at the appropriate position by the reinforcing member (wire frame 24 or the like) of the seat cushion 21, but is not necessarily limited thereto. Is not to be done. At least when the frontal collision or the like occurs in the vehicle and the forward movement of the occupant C is started, the forward movement of the submarine deterrence bar may be restricted and substantially fixed in an appropriate position.

  For example, as shown in FIG. 9, the submarine suppression bar 303 is simply fixed in the seat cushion 21, and a protruding member 308, which is a separate member, is disposed in front of the submarine suppression bar 303. Also good.

  In this case, when the seat cushion 21 starts to move forward in the case of a frontal collision of the vehicle or the like, as shown by a two-dot chain line in the figure, the submarine suppression bar 303 comes into contact with the protruding member 308 and the seat cushion 21 and the submarine suppression bar. The forward movement of 303 is prevented.

  The protruding member 308 is formed such that an intermediate protruding portion 308 a protrudes upward from the floor panel rear 11, and the upper end portion thereof is disposed in front of the submarine suppression bar 303 of the seat cushion 21. ing. The submarine deterrence bar 303 is arranged at the appropriate position in the seat cushion 21 when the submarine deterrence bar 303 comes into contact with the protrusion 308a of the protrusion member 308.

  Further, the projecting member 308 has a projecting portion 308a extending in the vehicle width direction, and is formed, for example, in a cross-sectional hat shape as illustrated. A flat base 308b is formed on the front and rear sides of the projecting portion 308a. The projecting member 308 has bolts on the side frames 310 that extend in the front-rear direction on both sides of the floor panel rear 11 in the vehicle width direction. By being fastened at 309 and 309, it is fixed to the vehicle body. Here, the side frame 310 constitutes a frame member on the side of the vehicle body as a vehicle body reinforcing member.

  In this case, when a vehicle front collision or the like occurs, the submarine deterrence bar 3 abuts against the protruding member 308, thereby suppressing the forward movement of the seat cushion 21, and hence the forward movement of the passenger C, and the submarine deterrence bar 303. By providing a member (protruding member 308) for restricting the forward movement of the vehicle on the vehicle body side instead of the seat cushion 21 side, the configuration on the rear seat 2 side can be simplified.

  Further, by fastening the protruding member 308 to the side frame 310 as the vehicle body reinforcing member, the forward movement of the protruding member 308 can be reliably suppressed, and as a result, the forward movement of the seat cushion 21 and the occupant C is further improved. It can be reliably suppressed.

  However, the vehicle body frame for fastening the protruding member 308 is not limited to the side frame 310 described above, and may be a cross member extending in the vehicle width direction.

(Fifth embodiment)
As shown in FIGS. 10 and 11, the submarine deterrence bar 403 is held movably in the seat cushion 21, and a bar moving mechanism 400 is provided so that the occupant C moves forward due to the occurrence of a vehicle frontal collision or the like. When starting, the submarine suppression bar 403 may be moved to the appropriate position by the bar moving mechanism 400.

  The bar moving mechanism 400 in the seat cushion 22 mainly includes a swing shaft 400a that extends in the vehicle width direction and is fixed to the wire frame 24 (first and second wires 25 and 26), and the swing shaft 400a. Is connected to the movement detecting lever portion 400b via a link member 400d, and is positioned in front of the swinging shaft 400a and swings thereto. It is comprised from the bar pushing operation part 400c supported movably.

  In the present embodiment, the submarine suppression bar 403 is normally located below the appropriate position. In the bar moving mechanism 400, the movement detection lever portion 400b is located below the hip point HP of the occupant C, and the tip of the bar push-up operation portion 400c is located directly below the submarine suppression bar 403.

  Here, when the occupant C starts to move forward due to the occurrence of a vehicle frontal collision or the like, the buttocks of the occupant C move forward and downward as indicated by the thick arrows in FIG. The movement detecting lever portion 400b is pushed downward by the load of the occupant C's buttocks, and is swung clockwise as indicated by a two-dot chain line in the figure.

  Then, the other bar push-up operation unit 400c swings in the clockwise direction in the figure as shown by a two-dot chain line in conjunction with the swing of the movement detection lever part 400b. For this reason, the bar push-up operation unit 400c can push up the submarine deterrence bar 403 upward at its tip.

  At this time, the pushed-up state of the submarine restraining bar 403 by the bar push-up operation unit 400c is maintained by the load of the occupant C, and the swing shaft 400a is fixed to the wire frame 24. The movement is reliably regulated and is substantially fixed at the appropriate position in the seat cushion 21.

  In the present embodiment, as described above, when the submarine deterrence bar 403 is installed below the appropriate position in the seat cushion 21 at the normal time, the seated passenger C may feel unevenness on the seating surface. This can prevent the seating ability of the occupant C from being hindered.

  On the other hand, when a vehicle front collision or the like occurs, the bar push-up operation unit 400c moves the submarine suppression bar 403 to the upper appropriate position in conjunction with detection of the forward movement of the occupant C by the movement detection lever unit 400b. Therefore, although the structure is simple, the forward movement of the occupant C can be reliably suppressed, and the injury value due to the tightening of the seat belt B1 can be reduced.

  In this embodiment, the push-up operation unit 400c is swung by the load accompanying the forward movement of the occupant C and the submarine suppression bar 403 is moved upward. However, the present invention is not necessarily limited thereto. . For example, a pressure sensor or the like may be provided in the seat cushion and the forward movement of the occupant C may be detected based on a change in the pressure value of the sensor. In this case, the submarine is controlled by electronically controlling a predetermined actuator or the like. The suppression bar 403 may be moved.

(Sixth embodiment)
By the way, in recent years, in the seat belt apparatus B, the seat belt B1 is used with a force such as a spring or explosives under a predetermined state in which a constant deceleration is detected, such as when a vehicle front collision occurs or when a vehicle front collision is predicted. The development of seat belt pretensioners that drive in the tightening direction and impart tension to the seat belt B1 has been actively performed.

  In such a seat belt pretensioner, as shown in FIGS. 12 and 13, a lap pretensioner is connected to one end side of the lap belt B1a and is driven in the tightening direction of the lap belt B1a under the predetermined condition. There is a tensioner B2.

  In the present embodiment shown in FIG. 12, an inflator (not shown) constituting the lap pretensioner B2 is connected to the vehicle body structure, and the lap belt B1a is connected to the lap pretensioner B2 while restraining the occupant C. One end side is connected to the vehicle body structure via a wrap pretensioner B2 (inflator). Thereby, also in this embodiment, both ends of the lap belt B1a are configured to be connected to the vehicle body structure around the rear portion of the seat cushion 21.

  This lap pretensioner B2 is provided with a pretensioner main body B2a that generates a tensile force in response to the deceleration when the vehicle deceleration exceeds a threshold value. As shown in FIG. 13, an upper pin B2c is connected to the pretensioner body B2a via a wire B2b.

  Then, one end of the lap belt B1a is connected to the seatbelt connecting portion B2e connected to the wire connecting portion B2d having the pin B2c, and the wire B2b is pulled by the tensile force of the pretensioner body B2a, whereby the wire connecting portion B2d and the seat The lap belt B1a is pulled in via the belt connecting portion B2e.

  The pretensioner body B2a includes a gas generator (not shown) that generates a large amount of gas when the deceleration of the vehicle exceeds a threshold, and a cylinder B2f that receives the gas generated in the gas generator, A piston (not shown) that moves with gas flowing into the cylinder B2f, a pulling wire B2g attached to the piston, a pulley B2h that connects the tip of the pulling wire B2g, and a bolt that rotatably supports the pulley B2h on the casing B2i B2j.

  As described above, when the vehicle frontal collision occurs or when it is predicted that the vehicle frontal collision will occur, the vehicle equipped with the lap pretensioner B2 that tightens the seat belt B1 may cause the occupant C to move forward when a vehicle frontal collision occurs. It is suppressed by the seat belt B1 (particularly the lap belt B1a).

  For this reason, in this embodiment, as shown in FIG. 12, the position of the submarine deterrence bar 503 is from the appropriate position (submarine deterrence bar 3 indicated by a two-dot chain line in the figure) when the wrap pretensioner B2 is not provided. Is also set at the rear position close to the hip point HP. Specifically, in the seat cushion 21, the submarine suppression bar 503 is installed at an appropriate position set in a range of 0 to 100 mm away from the hip point HP in the front of the vehicle. It is installed at an installation point separated by a distance D2 (65 mm) in front of the vehicle.

  Moreover, about the position in the up-down direction of the submarine suppression bar 3, it is substantially the same as the said appropriate position in case the lap pretensioner B2 is not provided.

  Thus, in contrast to the seat belt apparatus B having the lap pretensioner B2, the submarine deterrence bar 503 is installed in a range of 0 to 100 mm away from the hip point HP in the front of the vehicle, thereby reducing the injury value. It can be exhibited effectively.

(Seventh embodiment)
Further, the configuration of the fifth embodiment in which the submarine suppression bar is moved upward in conjunction with the detection of the forward movement of the occupant C may be applied when the seat belt apparatus B includes the lap pretensioner B2.

  FIG. 14 shows a configuration in which the seat belt apparatus B includes the wrap pretensioner B2, and includes a bar moving mechanism 600 and a submarine suppressing bar 603 corresponding to the bar moving mechanism 400 and the submarine suppressing bar 403 of the fifth embodiment, respectively. Show.

  Here, the bar moving mechanism 600 includes a swing shaft 400a, a movement detection lever portion 400b, a bar push-up operation portion 400c, a swing shaft 600a corresponding to the link member 400d, a movement detection lever portion 600b, A bar push-up operation portion 600c and a link member 600d are provided, and their actions are substantially the same.

  However, in the present embodiment, the forward movement of the occupant C is suppressed by the lap pretensioner B2 with the occurrence of a vehicle frontal collision or the like, and the distance of the forward movement of the buttocks of the occupant C as shown by the thick arrow in FIG. Since it can be kept short, the movement detection lever portion 600b is set further rearward than in the case of the fifth embodiment in order to reliably detect the forward movement of the occupant C.

  And since the said optimal position is set back rather than the case of 5th Embodiment, the position of the submarine suppression bar 603 at the time of normal, and the position is set further back also in the bar pushing-up operation part 600c. Yes.

  In this embodiment, for this reason, the bar moving mechanism 600 and the submarine deterrence bar 603 are arranged at a rear position as compared with the case of the fifth embodiment, and the lap pretensioner B2 suppresses the forward movement of the occupant C. Even under such a state, the bar moving mechanism 600 and the submarine suppression bar 603 can function suitably.

  In the second to seventh embodiments, the same components as those of the first embodiment described with reference to FIGS. 1 to 6 are denoted by the same reference numerals, and detailed description thereof is omitted.

  Further, in each of the above-described embodiments, the submarine deterrence bar 3 and the like are all formed in a long bar shape. However, the present invention is not necessarily limited to this, and for example, it is extended in the vehicle width direction such as a long plate shape. Any member may be used.

In correspondence between the configuration of the present invention and the above-described embodiment,
The forward movement restraining member and the submarine preventing member of the present invention correspond to the submarine restraining bars 3, 203, 303, 403, 503, 603,
Similarly,
The movement restricting members correspond to the wire frames 24 and 124, the swing shaft 400a, the bar push-up operation unit 400c, and the protruding member 308.
The seat cushion reinforcement member corresponds to the wire frames 24, 124,
The vehicle body reinforcement member corresponds to the side frame 310,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

1 is a side sectional view showing a seat structure of a rear seat according to a first embodiment of the present invention. The permeation | transmission top view which shows the wire frame and submarine suppression bar which were built in the seat cushion of the rear seat shown in FIG. The side view which expands and shows the fixed state of a submarine suppression bar. The perspective view of the lock part periphery of a wire frame. The side view which shows the installation point of the submarine suppression bar in the state which restrained the dummy seated on the rear seat by the seatbelt apparatus, and the impact measurement experiment at the time of vehicle front collision. It is a graph which shows the result of having measured the injury value when an impact is added to the part corresponding to the chest of the dummy by fastening the seat belt, (a) a graph showing the result of measuring the acceleration of the impact, (b) the chest of the dummy The graph which shows the result of having measured the amount of bending of an equivalent part. The sectional side view which shows the seat structure of the rear seat which concerns on 2nd Embodiment of this invention. The permeation | transmission top view which shows the wire frame and submarine suppression bar which were equipped with the seat cushion of the rear seat which concerns on 3rd Embodiment of this invention. The side view which shows the seat structure of the rear seat which concerns on 4th Embodiment of this invention. The side view which shows the seat structure of the rear seat which concerns on 5th Embodiment of this invention. The permeation | transmission top view which shows the wire frame and submarine suppression bar which were built in the seat cushion of the rear seat shown in FIG. The sectional side view which shows the seat structure of the rear seat which concerns on 6th Embodiment of this invention. The side view which shows a lap pretensioner. The sectional side view which shows the seat structure of the rear seat which concerns on 7th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Floor panel 2 ... Rear seat 3, 203, 303, 403, 503, 603 ... Submarine suppression bar 21 ... Seat cushion 22 ... Seat back 23 ... Pad 24, 124 ... Wire frame 308 ... Projection member 310 ... Side frame B ... Seat Belt device B1a ... lap belt

Claims (7)

A seat cushion mounted on the vehicle body floor and having a cushion pad;
A seat back coupled to the seat cushion;
A vehicle seat structure including a seat belt device for restraining a seated occupant,
While having a forward movement restraining member that restrains the forward movement of the occupant during a vehicle collision, and a movement restricting member that restricts the forward movement restraining member from moving forward of the vehicle,
The seat belt device includes a lap belt,
The forward movement suppressing member is installed in the seat cushion so as to extend in the vehicle width direction,
The movement restricting member is provided so as to substantially fix the position of the front movement suppressing member in the seat cushion at the time of a vehicle collision, thereby restricting the movement of the front movement suppressing member to the front of the vehicle. Sheet structure. The movement restricting member is a seat cushion reinforcing member,
The vehicle seat structure according to claim 1, wherein the forward movement suppressing member is fixed to the seat cushion reinforcing member in the seat cushion. The vehicle seat structure according to claim 2, wherein the seat cushion reinforcing member is fixed to a vehicle body. The seat cushion reinforcing member is a wire member provided in the seat cushion,
The wire member is coupled to the vehicle body on the rear side of the seat cushion and extends forward from the coupling position.
The vehicle seat structure according to claim 3, wherein the forward movement suppressing member is connected to a vehicle upper side of a portion of the wire that extends forward from the connection position. The vehicle seat structure according to claim 1, wherein the movement restricting member is a protruding member that protrudes from a vehicle body floor in front of the vehicle relative to the forward movement suppressing member. The vehicle seat structure according to claim 5, wherein the protruding member is fixed to a reinforcing member of a vehicle body. The vehicle seat structure according to any one of claims 1 to 6, wherein the forward movement suppressing member is a submarine preventing member formed in a long shape.

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