JP6111471B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat, and more specifically, a cushion frame is formed on a vehicle floor side base member by a support shaft with respect to the vehicle floor side base member and another member other than the support shaft. The present invention relates to an assembled vehicle seat.

  Conventionally, a vehicle such as a vehicle has been provided with a seat on which an occupant can be seated. For example, when the vehicle is an automobile such as a minivan, the second row of seats (vehicle seats) is configured to allow various arrangements. Here, the following Patent Document 1 discloses a sheet that can be arranged such as chip-up. As a result, it is possible to arrange such that the seat cushion is flipped up so as to face the seat back, so that the seat can be slid to the front side of the vehicle or the rear side of the vehicle by the slide mechanism in the raised state. Therefore, it is possible to secure a large luggage space in the automobile.

JP 2013-35390 A

  However, in the tip-up technique shown in Patent Document 1 described above, for example, as shown in FIGS. 5 to 7, the left and right side frames 112, 112 of the cushion frame 102 a are connected to the tip-up rotating shaft b 1 and the slide mechanism 120. It is assembled (supported) to the upper rail 124 of the slide mechanism 120 by a boss 124 a assembled to the upper rail 124. At this time, in order to reduce the weight of the seat 101, for example, when a part of the cushion frame 102a is formed of resin, that is, the cushion frame 102a is inserted into the resin frame 110 and the resin frame 110 ( When the front collision occurs in the traveling vehicle when the metal left and right side frames 112 and 112 (which are insert-molded) are formed, a large load from the seated person due to the front collision is generated in the seat cushion 102. Since the resin frame 110 acts on the front side, the resin frame 110 has a seesaw posture (a posture in which the front side of the resin frame 110 faces downward and a rear side of the resin frame 110 faces upward) with the boss 124a as a fulcrum. Thereby, the problem that the resin frame 110 will be damaged has occurred (see FIG. 8). In order to solve this problem, it has been considered that the resin frame 110 is firmly formed without being thinned. However, with this idea, since the weight of the resin frame 110 increases, the weight of the sheet 101 cannot be reduced.

  The present invention is intended to solve such a problem, and its purpose is that when a frontal collision occurs in a traveling vehicle, a large load from a seated person due to the frontal collision is generated on the front side of the seat cushion of the resin frame. It is an object of the present invention to provide a vehicle seat that can withstand this heavy load without strongly forming the resin frame of the seat cushion even if it acts on the vehicle.

The present invention is for achieving the above object, and is configured as follows. The invention according to claim 1 includes a resin frame and metal left and right side frames, and includes a cushion frame formed by insert molding the left and right side frames with respect to the resin frame, A vehicle seat in which a cushion frame is assembled to a base member on a vehicle floor by a support shaft with respect to the base member on the vehicle floor side and another member other than the support shaft on the front side of the support shaft. there have, in the side frames, when the vehicle during running front collision occurs, is formed with a bead which forms a bending portion bent in the shape shape rather substantially the large load from the seated person, the side surface of the resin frame Is a structure characterized in that a notch is formed so that the bead of the side frame is exposed from the resin frame .
According to this configuration, when a front collision occurs in the traveling vehicle, a large load from a seated person due to the front collision acts on the front side of the seat cushion. Then, the side frame is deformed into a substantially square shape by the large load acting on the front side. Due to this deformation, a large load acting on the front side can be absorbed, and unlike the conventional technique, the resin frame is not damaged. Therefore, it is possible to withstand this heavy load without forming the resin frame firmly.

The invention according to claim 2 is the vehicle seat according to claim 1, wherein the upper sides of the left and right side frames are insert-molded in a state of being covered with a resin frame, It is formed on the lower side of the frame, and the cutout is formed on the lower side of the resin frame .
According to this configuration, an effect that a large load from a seated person can be endured without forming the resin frame firmly can be obtained without affecting the seating surface side that is the upper side of the resin frame. .

The invention according to claim 3 is the vehicle seat according to claim 2, wherein the seating surface of the resin frame is formed so that the position corresponding to the bead of the side frame is thin (the thin part is formed). It is the structure characterized by being made.
According to this configuration, when the resin frame is deformed in a substantially square shape as described in claim 2, the thin portion performs a hinge action. Therefore, when the resin frame follows the deformation of the side frame, this followability can be enhanced. As a result, even if the side frame is deformed, the resin frame can be reliably prevented from breaking.

It is a disassembled perspective view which shows the structure of the flame | frame inside the seat cushion of the vehicle seat which concerns on the Example of this invention. It is a perspective view which shows the assembly | attachment state of FIG. It is a schematic diagram of the left side surface of FIG. In FIG. 3, it is a figure which shows the state which the front collision produced in the vehicle during driving | running | working. It is a disassembled perspective view which shows the structure of the flame | frame inside the seat cushion of the vehicle seat which concerns on a prior art. It is a perspective view which shows the assembly | attachment state of FIG. It is a schematic diagram of the left side surface of FIG. In FIG. 7, it is a figure which shows the state which the front collision produced in the vehicle during driving | running | working.

  Hereinafter, the form for implementing this invention is demonstrated using FIGS. In the following description, “vehicle seat 1” will be described as an example of “vehicle seat”. In the following description, the terms “up”, “down”, “front”, “rear”, “left”, and “right” refer to “up”, “down”, “front”, “rear”, “left”, “right”, ie, the vehicle (not shown). The directions of up, down, front, back, left and right are shown when the vehicle seat 1 is assembled.

  First, the configuration of the vehicle seat 1 will be described with reference to FIGS. The vehicle seat 1 is, for example, a second row seat of an automobile such as a minivan, and includes a seat cushion 2 and a seat back (not shown). The vehicle seat 1 is configured to be tip-up (arranged to flip up the seat cushion 2 so as to face the seat back (not shown)).

  Of these seat cushion 2 and seat back (not shown), the seat cushion 2 will be described in detail. Since the seat back (not shown) may be a known one, its detailed description is omitted. The seat cushion 2 includes a cushion frame 2a, a known seat cushion pad (not shown) that is assembled to the cushion frame 2a, and a known seat cushion cover that covers the surface of the seat cushion pad ( (Not shown).

  1-4, illustration of the seat cushion pad and the seat cushion cover is omitted in order to make the structure of the frame inside the seat cushion 2 which is the main part of the present invention easier to see. The cushion frame 2a is made of a resin frame 10 that is integrally formed of a synthetic resin having rigidity so as to form a skeleton thereof, and a metal frame that is inserted (insert-molded) on both the left and right sides of the resin frame 10. It consists of side frames 12 and 12.

  In addition, since it is insert molding in this way, the left and right side frames 12, 12 cannot exist independently with respect to the resin frame 10 as shown in FIG. However, in order to make the structure of the frame inside the seat cushion 2 easier to understand, the right and left side frames 12 and 12 are present independently from the resin frame 10 as shown in FIG. Show.

  In order to reduce the weight of the resin frame 10, the bottom surface side is greatly cut out. Of course, in order to ensure the necessary rigidity even if the meat is largely thinned, a plurality of (in this example, six) ribs 10a are formed at appropriate intervals on the thinned concave surface. Further, notches 10 b and 10 b are formed on the left and right side surfaces of the resin frame 10 so that beads 12 a and 12 a described later of the left and right side frames 12 and 12 are exposed from the resin frame 10. That is, each bead 12a, 12a and each notch 10b, 10b are formed in the corresponding position.

  The seating surface of the resin frame 10 is formed in a thin shape (thin portion 10c) at positions corresponding to the beads 12a, 12a of the left and right side frames 12, 12. On the other hand, the left and right side frames 12 and 12 form bent portions of a substantially U-shaped bend due to a large load from a seated person (not shown) when a front collision occurs in a traveling vehicle (not shown). Beads 12a and 12a are formed. That is, when a front collision occurs in a traveling vehicle (not shown) by the bead 12a, the side frame 12 is bent into a substantially letter shape due to a large load from a seated person.

  Here, the assembly structure of the left and right lower arms 30, 30 with respect to the cushion frame 2a will be described. Since this assembly structure is an object on the left and right, description of the assembly structure on the right side will be omitted by describing the assembly structure on the left side. The rear side of the left side surface of the cushion frame 2a and the left lower arm 30 are assembled via a stepped bolt B1 so that the cushion frame 2a and the left lower arm 30 are rotatable relative to each other.

  The stepped bolt B1 corresponds to a “support shaft” described in the claims. Thereby, the cushion frame 2 a can be rotated with respect to the left lower arm 30. That is, a tip-up arrangement can be made in which the seat cushion 2 is flipped up so as to face the seat back (not shown). The left lower arm 30 is fixed to a bracket 26 fastened to the left upper rail 24 of the slide mechanism 20 including the lower rail 22 and the upper rail 24 via screws B2 and B2.

  A boss 24a capable of supporting the seat cushion 2 (side frame 12) in a seatable state is fixed to the left upper rail 24. The boss 24a corresponds to “another member” described in the claims. The left and right lower arms 30 and 30 and the left and right upper rails 24 and 24 correspond to a “base member” recited in the claims. The vehicle seat 1 is configured in this way.

  Then, the effect | action of the vehicle seat 1 is demonstrated. When a front collision occurs in the traveling vehicle, a large load from a seated person due to the front collision acts on the front side of the seat cushion 2, and as described in the prior art, the resin frame 10 uses the boss 24a as a fulcrum as a seesaw. It becomes a posture (a posture in which the front side of the resin frame 10 faces downward and a posture in which the rear side of the resin frame 10 faces upward). Then, the left and right side frames 12 and 12 are deformed into a generally letter-shaped shape so that the beads 12a and 12a of the left and right side frames 12 and 12 become bent portions of a substantially letter-shaped bend (FIG. 4). reference). At this time, the resin frame 10 is also deformed into a substantially square shape with the notches 10b and 10b as bent portions, following the deformation.

  The vehicle seat 1 according to the embodiment of the present invention is configured as described above. According to this configuration, the left and right side frames 12, 12 inserted in the resin frame 10 are subjected to a heavy load from a seated person (not shown) when a front collision occurs in a traveling vehicle (not shown). As a result, beads 12a and 12a forming bent portions of a substantially letter-shaped bend are formed. Therefore, when a large load from the seated person due to the front impact acts on the front side of the seat cushion 2, the left and right side frames 12 and 12 are deformed into a substantially square shape by the large load acting on the front side (see FIG. 4). ). Due to this deformation, a large load acting on the front side can be absorbed, so that unlike the prior art, the resin frame 10 is not damaged. Therefore, it is possible to withstand this heavy load without forming the resin frame 10 firmly.

  Further, according to this configuration, notches 10 b and 10 b are formed on the left and right side surfaces of the resin frame 10 so that beads 12 a and 12 a described later of the left and right side frames 12 and 12 are exposed from the resin frame 10. Yes. Therefore, when the left and right side frames 12 and 12 inserted in the resin frame 10 are deformed into a substantially square shape, the resin frame 10 is also deformed into a substantially square shape via the notches 10b and 10 so as to follow this deformation. I will do it. Therefore, even if the left and right side frames 12 and 12 are deformed, the resin frame 10 can be prevented from being broken.

  Moreover, according to this structure, the seating surface of the resin frame 10 is formed in a thin shape (thin portion 10c) at positions corresponding to the beads 12a, 12a of the left and right side frames 12, 12. Therefore, as described above, when the resin frame 10 is deformed into a substantially square shape, the thin portion 10c performs a hinge action. Therefore, when the resin frame 10 follows the deformation of the left and right side frames 12, 12, this followability can be enhanced. As a result, even if the left and right side frames 12, 12 are deformed, the resin frame 10 can be reliably prevented from breaking.

The contents described above are only related to one embodiment of the present invention, and do not mean that the present invention is limited to the above contents.
In the embodiment, “vehicle seat 1” has been described as an example of “vehicle seat”. However, the present invention is not limited to this, and the “vehicle seat” may be various vehicle seats such as “ship seat”, “plane seat”, “railway seat”, and the like. Absent.

  Moreover, in the Example, the vehicle seat 1 demonstrated the form comprised so that chip-up was possible. However, the present invention is not limited to this, and it may be configured such that chip-up is impossible. That is, the left and right side frames 12 of the vehicle seat 1 are assembled to the vehicle floor side base member by the support shaft with respect to the vehicle floor side base member and another member other than the support shaft. It only has to be done.

  In the embodiment, the “upper rail 24 and the lower arm 30 fixed to the upper rail 24” are described as examples of the “base member on the vehicle floor side”. However, the present invention is not limited to this, and the “base member on the vehicle floor side” may be the “vehicle floor itself”.

1 Vehicle seat (vehicle seat)
2a Cushion frame 10 Resin frame 10b Notch 10c Thin portion 12 Side frame 12a Bead 24 Upper rail (base member)
30 Lower arm (base member)

Claims (3)

It is composed of a resin frame and metal left and right side frames, and includes a cushion frame formed by insert molding the left and right side frames to the resin frame, and the cushion frame is a base member on the vehicle floor side. The vehicle seat is assembled to the vehicle floor base member by the support shaft and another member other than the support shaft on the front side of the support shaft,
In the side frame, when a frontal collision occurs in the traveling vehicle, a bead that forms a bent portion of a substantially U-shaped bend due to a large load from the seated person is formed ,
A vehicle seat characterized in that a cutout is formed on a side surface of the resin frame so that a bead of the side frame is exposed from the resin frame . The vehicle seat according to claim 1,
The upper sides of the left and right side frames are insert molded in a state covered with a resin frame,
The bead is formed under the side frame,
A vehicle seat characterized in that the notch is formed on the lower side of the resin frame . The vehicle seat according to claim 2,
A seat for a vehicle, wherein a seating surface of the resin frame is formed in a thin shape at a position corresponding to a bead of the side frame.

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