JP2006321284A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain the movement amount of the EAP point of a central seat portion when a load is applied without causing a significant increase in weight and cost, and to divide them into a seat cushion frame 21 and a seat back frame 22 in left and right directions First and second lean reinforcement frames 215 and 224 are provided as described above. A three-point seat belt 3 that connects the rear end portion of the seat cushion frame 21 along the lean reinforcement frames 215 and 224 and the upper end portion of the seat back frame 22 and the buckle 33 provided on the side end portion of the seat cushion frame 21. The partition area Z2 of the seat cushion frame 21 that is partitioned by the first lean reinforcement frame 215 and includes the side end portion is made relatively deformable with respect to the partition area Z1. Specifically, the reinforcing pipe 216 is installed in the pipe-shaped horizontal frame 213 portion at the front edge of the seat cushion frame 21 in the partition region Z1.
[Selection] Figure 1

Description

  The present invention relates to a vehicle seat, and more particularly to an improvement in a frame structure of a vehicle seat incorporating a seat belt.

  FIG. 3 shows an appearance of a sheet on the 6-division side of a so-called 6: 4 division folding tumble sheet. In FIG. 3, the seat 1 includes a right seat portion 11 and a central seat portion 12, and a three-point seat belt 3 is provided for an occupant seated on the central seat portion 12. When the seat belt 3 is not in use, as shown in the figure, the webbing 31 is positioned in the vertical direction at the boundary between the right seat part 11 and the central seat part 12, and the upper end of the webbing 31 is wound around a retractor described later, Is fixed to the sea cushion frame by an anchor. When the seat belt 3 is used, the tongue 32 provided at the intermediate position of the webbing 31 is coupled to the buckle 33 located on the rear end side portion of the seat cushion 121 of the central seat portion 12. As a result, the webbing 31 holds the upper body of the occupant seated on the central seat portion 12 across the front surface of the seat back 122 in a V shape as shown by the chain line in FIG.

  FIG. 4 shows the frame structure of the seat 1. The seat frame 2 includes a seat cushion frame 21 having a substantially rectangular frame shape, and a substantially portal frame-like seat back frame 22 coupled to the rear end thereof via reclining mechanisms 41 and 42. The seat cushion frame 21 is formed by connecting left and right plate-like vertical frames 211 and 212 with front and rear pipe-like horizontal frames 213 and 214, and the seat cushion frame 21 is divided into right and left partition regions Z1 and Z2. Thus, a plate-like first lean reinforcement frame 215 extending in the front-rear direction is provided. The partition areas Z1 and Z2 correspond to the right sheet portion 11 and the center sheet portion 12, respectively. The front and rear ends of the first lean reinforcement frame 215 are fixed to the horizontal frames 213 and 214, respectively. The lower surfaces of the vertical frame 211 and the first lean reinforcement frame 215 are movably supported by seat rails 41 and 42 extending in the front-rear direction, and the front ends of the seat rails 41 and 42 are coupled to the vehicle floor by hinges 43. It can stand up and turn forward. A hook member 44 that is detachably engaged with a striker provided on the vehicle floor is provided on the lower surface of the rear end portion of the seat rails 41 and 42.

  The seat back frame 22 is formed by fixing the lower ends of both sides of a substantially gate-shaped pipe body forming a horizontal frame 221 to plate-like leg pieces to form vertical frames 222 and 223, respectively. A plate-like second lean reinforcement frame 224 is provided in the vertical direction so as to be divided into left and right. The second lean reinforcement frame 224 has an upper end fixed to the horizontal frame 221 and a lower end coupled to the rear end of the first lean reinforcement frame 215 via the reclining mechanism 42. One vertical frame 222 of the seat back frame 22 is coupled to the rear end of the vertical frame 211 of the seat cushion frame 21 via the reclining mechanism 41, and the other vertical frame 223 is connected to the rear end of the vertical frame 212 of the seat cushion frame 21. It is pivotally connected.

  In the seat back frame 22, a retractor 226 is provided on a horizontal pipe 225 connecting the vertical frame 222 and the second lean reinforcement frame 224. The webbing 31 is pulled out rearward of the seatback frame 22 from the retractor 226, and is pulled out downward in front of the seatback frame 22 from the seat belt outlet 5 provided at the upper end of the second lean reinforcement frame 224. The lower end of the webbing 31 is fixed by an anchor 34 to a bracket 35 provided in the lateral frame 214 portion in the right partition region Z1 near the rear end of the first lean reinforcement frame 215. When the seat belt is in use, the tongue 32 provided at the intermediate position of the webbing 31 is coupled to the buckle 33 provided at the rear end of the vertical frame 212 of the seat cushion frame 21.

  When an excessive load is applied to the webbing 31 due to sudden deceleration of the vehicle while the upper body of the occupant is held by the seat belt, a forward rotational moment is applied to the second lean reinforcement frame 224, and the first lean reinforcement frame 215. Bending moment is applied to the front frame and the horizontal frame 214, buckling force is applied to the front ends of the seat rails 41 and 42 and the hinge 43, and forward pushing force is applied to the vertical frame 212. Therefore, conventionally, by improving the strength of the first and second lean reinforcement frames 215 and 224, the amount of movement of the seat belt outlet 5 of the central seat portion 12 is suppressed, thereby ensuring the safety of the passenger.

Patent Document 1 discloses a vehicle seat having a structure in which a reinforcing member is incorporated in a seat cushion frame in the front-rear direction to resist bending force.
JP-A-11-115595

  However, in the conventional vehicle seat, since the strength of the first and second lean reinforcement frames is increased, stress is concentrated on the other members and there is a risk of breakage. Therefore, it is necessary to increase the strength of the entire seat frame. Therefore, there has been a problem that the weight of the entire sheet is increased and the cost is increased.

  Accordingly, the present invention solves such problems, and provides a vehicle seat that can suppress the amount of movement of the seat belt outlet of the central seat portion when a load is applied without causing a significant increase in weight or cost. The purpose is to do.

  In order to achieve the above object, in the first invention, the first lean reinforcement frame (215) is provided in the front-rear direction so as to divide the seat cushion frame (21) in a substantially rectangular frame shape in the left-right direction, A second lean reinforcement frame (224) is provided in the vertical direction so as to divide the seat cushion frame (21) into a substantially back-shaped seat back frame (22) connected to the rear end of the seat cushion frame (21). The seat belt (3) can be installed between the upper end (5) of the second lean reinforcement frame (224) and one side end (33) of the seat cushion frame (21). One partition region (21) of the seat cushion frame (21) which is a seat and is partitioned by the first lean reinforcement frame (215) and includes the one side end portion. 2) to facilitate relative deformation against the other defined areas (Z1).

  In the first aspect of the invention, when an excessive load is applied to the webbing due to sudden deceleration of the vehicle or the like while the upper body of the occupant is held by the seat belt, the load applied to the webbing is relatively easily deformed in one partition region Is absorbed. As a result, an excessive load does not act on the other partition region, and therefore, the amount of movement of the seat belt outlet of the central seat portion can be suppressed without increasing the strength of the entire seat frame.

  In the second aspect of the invention, the reinforcing pipe (216) is provided in the pipe-shaped horizontal frame (213) portion at the front edge of the seat cushion frame (21) in the other partition region (Z1). In the second aspect of the present invention, one partition area can be easily deformed relative to the other partition area with a simple structure.

  In addition, the code | symbol in the said parenthesis shows the correspondence with the specific means as described in embodiment mentioned later.

  As described above, according to the vehicle seat of the present invention, it is possible to effectively suppress the movement of the seat belt outlet of the central seat portion when a load is applied without causing a significant increase in weight or cost.

  FIG. 1 shows an appearance of a seat frame of a vehicle seat according to an embodiment of the present invention. The basic structure of the seat frame is the same as that of the conventional example (see FIG. 4) already described, and the same portions are denoted by the same reference numerals, and the following description will focus on the differences. In FIG. 1, inside the pipe-shaped horizontal frame 213 of the seat cushion frame 2, the reinforced pipe extends from the end on the vertical frame 211 side to a position slightly beyond the joint with the first lean hose frame 215 as shown in FIG. 216 is inserted and fixed to the horizontal frame 213 by welding. Thereby, the strength of the right partition area Z1 of the seat cushion frame 2 is improved as a whole, and the left partition area Z2 has a relatively small strength and is easily deformed relative to the right partition area Z1.

  In the vehicle seat having such a structure, when an excessive load is applied to the webbing 31 due to sudden deceleration of the vehicle while the upper body of the occupant is held by the seat belt, a forward pushing force acts on the vertical frame 212. As a result, in the left partition region Z2 of the seat cushion frame 2, as shown by the chain line in FIG. 1, the portion of the lateral frame 213 where the reinforcing pipe 216 is not inserted is deformed forward relatively easily. Thus, the horizontal frame 214 portion in the region Z2 is also deformed forward. In this way, the load applied to the webbing 31 is absorbed by deformation of the horizontal frames 213 and 214 in the left partition region Z2, and as a result, the horizontal frames 213 and 214 in the right partition region Z1 and the vertical frame 211 and the like. It is possible to avoid an excessive load from acting on. Thereby, the deformation | transformation is avoided even if it does not raise intensity | strength of the whole seat frame 2, Thereby, the movement amount of the seatbelt outlet 5 of the center seat part 12 can be suppressed. In the present embodiment, a three-point seat belt is shown, but this is an example, and the seat belt is not necessarily limited to the three-point system.

It is the perspective view which looked at the seat frame which shows one embodiment of the present invention from the front. It is an expanded sectional view of the A section of FIG. It is the perspective view which looked at the vehicle seat from the front. It is the perspective view which looked at the conventional seat frame from the front.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Seat, 11 ... Right side seat part, 12 ... Center seat part, 2 ... Seat frame, 21 ... Seat cushion frame, 213 ... Pipe-like horizontal frame, 215 ... 1st lean reinforcement frame, 216 ... Reinforcement pipe, 22 ... Seat back frame, 224 ... second lean reinforcement frame, 3 ... three-point seat belt, 33 ... buckle, 5 ... seat belt outlet, Z1, Z2 ... compartment area.

Claims (2)

A substantially rectangular frame-shaped seat back is provided with a first lean reinforcement frame in the front-rear direction so as to divide the seat cushion frame in a substantially rectangular frame shape, and connected to the rear end of the seat cushion frame. A second lean reinforcement frame is provided in a vertical direction so as to divide the frame into left and right within the frame, and a seat is provided between an upper end portion of the second lean reinforcement frame and one side end portion of the seat cushion frame. A vehicle seat in which a belt can be installed, wherein one partition region of the seat cushion frame including the one side end portion defined by the first lean reinforcement frame is relative to the other partition region. A vehicle seat characterized by being easily deformable. The vehicle seat according to claim 1, wherein a reinforced pipe is provided in a pipe-like horizontal frame portion at a front edge of the seat cushion frame in the other partition region.

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