JP5103214B2 - Frame fastening structure for vehicle seat - Google Patents

Description

  The present invention relates to a frame fastening structure for a vehicle seat, and specifically to a fastening structure for a frame including a buckle member and a shield member.

  As this type of frame, a frame (cushion frame) of a seat cushion disclosed in Patent Document 1 is known. In this known technique, the side surface of the cushion frame is covered with a shield member, and a buckle member in a forward inclined posture projects from an opening formed in the shield member. Then, after the lower part of the cushion frame is fitted to the rail member fastened and fixed to the floor of the passenger compartment, the front end of the seat belt that is stretched around the occupant is attached to the buckle member in the forward inclined posture.

  By the way, some vehicle seats include a mechanism (double folding mechanism) that lifts the seat back forward relative to the passenger compartment floor surface after the seat cushion is flipped up to the front side of the seat. In such a configuration, the seat back is configured to be independent from the seat cushion so as to be independent. Then, the lower part of the frame of the seat back (lower part of the back frame) is directly fastened to the vehicle floor without the rail member (see FIG. 5).

Therefore, referring to FIG. 5 (typical example), a bracket 60aF (substantially convex shape in side view) is connected to the lower portion of the back frame 60F. The bracket 60aF is disposed so as to protrude slightly toward the front side of the seat with respect to the back frame 60F.
A rotation device 80 for forward movement is fitted on the upper portion of the bracket 60aF, and a flange portion 90 is formed on the lower portion thereof so as to face the vehicle compartment floor surface 70. The side surface of the bracket 60aF is covered with the shield member 200, and the buckle member 100 in the forward inclined posture projects from the opening 220 of the shield member 200 formed on the front side of the rotation device 80.
The flange portion 90 of the bracket 60aF is fastened to the passenger compartment floor 70 in a well-balanced position at the front and rear positions of the rotation device 80. At this time, if the rear fastening position (BP) is set at the rear end of the bracket 60aF, the front fastening position (FP) is often set immediately below the opening 220. For this reason, a tool (air tool) is inserted from the above-mentioned opening 220, and the fastening operation of the front fastening position (FP) is performed.
Japanese Utility Model Publication No. 6-22121

However, in the above-described known technique, the buckle member in the forward inclined posture becomes an obstacle when the air tool is inserted into the opening in the fastening operation. Of course, it is possible to fasten the front end of the bracket while avoiding interference with the buckle member.
The present invention has been devised in view of the above-described points, and the problem to be solved by the present invention is to avoid the interference of the buckle member as much as possible and to swiftly fasten the frame at a desired position.

As means for solving the above-mentioned problems, the frame fastening structure for a vehicle seat according to the first aspect of the invention is such that the buckle member for the seat belt is inclined forward from the opening formed in the shield member that covers the frame of the vehicle seat. It is the structure protruded by.
In the above-described configuration, when the fastening position is set immediately below the opening and the frame is fastened to the entire surface of the passenger compartment, the buckle member at the opening may become an obstacle.

Therefore, in the present invention, the buckle member is attached to the above-mentioned frame so as to be rotatable in the longitudinal direction of the seat, and the opening of the shield member allows the displacement of the buckle member from the forward tilt position to the rear tilt position. It was set as the structure which forms a site | part.
Then, with the buckle member in the rearward tilting posture (while avoiding the interference of the buckle member as much as possible), the frame is fastened to the entire vehicle compartment at the fastening position below the buckle member in the forward tilting posture. The stopper member is arranged on the frame to restrict the backward inclination of the buckle member.

  A frame fastening structure for a vehicle seat according to a second aspect of the present invention is the frame fastening structure for a vehicle seat according to the first aspect, wherein the buckle member is then biased in a tilting direction and attached to the frame. The rear tilt prevention surface provided on the buckle member is brought into contact with the rear tilt prevention surface provided on the stopper member (surface contact), so that the rear tilt of the buckle member is more reliably regulated.

  According to the first aspect of the present invention, interference with the buckle member can be avoided as much as possible, and the frame can be fastened at a desired position. And according to the 2nd invention, a buckle member can be made into a desired posture more certainly.

  The best mode for carrying out the present invention will be described below with reference to FIGS. In each of the drawings, a reference symbol F is attached to the front of the vehicle seat, a reference symbol B to the rear of the vehicle seat, and a reference symbol L to the side of the vehicle seat. Note that the passenger compartment floor 70 of the present embodiment is configured to be slightly inclined upward toward the rear of the seat.

Referring to FIG. 1, the vehicle seat 2 of the present embodiment includes a seat back 6 (both having a continuous wide shape) separate from the seat cushion 4 and a buckle member 10 for a seat belt described later. .
The vehicle seat 2 includes a double folding mechanism, and after the seat cushion 4 is lifted up to the front side of the seat, the self-supporting seat back 6 can be moved forward to the vehicle compartment floor 70 (FIG. 1 (a ) To (c) in order). The seat back 6 is configured to be self-supported by being directly fastened to the passenger compartment floor surface 70 with a pair of left and right brackets 6aF and 6aF, which is a lower configuration thereof.

(Bracket (frame))
The pair of brackets 6aF and 6aF (substantially convex shape when viewed from the side) is fitted with a turning device 8 (substantially circular shape) for forward movement, with reference to FIGS. 2 and 3. A flange portion 9 is formed at the lower portion of the bracket 6aF so as to protrude in a face-to-face manner with respect to the passenger compartment floor surface 70.
The side surface of the bracket 6aF is covered with a shield member 20 (detailed configuration will be described later). And the buckle member 10 (detailed configuration will be described later) projecting toward the seat cushion 4 from the opening 22 of the shield member 20 formed on the front side of the rotating device 8 (see FIG. 1). ).

Then, referring to FIG. 2, the pair of brackets 6aF and 6aF (flange portion 9) are fastened to the vehicle compartment floor 70 in a well-balanced position at the front and rear positions of the rotating device 8.
At this time, in this embodiment, the rear fastening position BP (first fastening hole 9b) of the bracket 6aF is set to the rear end of the bracket 6aF. The first fastening hole 9b is formed at a position separated by a separation distance P1 on the rear side of the seat with reference to a vertical line passing through the rotation device 8.
On the other hand, the front fastening position FP (second fastening hole 9f) of the bracket 6aF is at a position separated from the front side of the seat by a separation distance P2 with respect to the vertical line passing through the turning device 8 (adjacent to the turning device 8). Set. At this time, by setting the separation distances P1 and P2 to substantially the same distance, the bracket 6aF can be fastened to the vehicle compartment floor 70 in a well-balanced position at the front and rear positions of the rotating device 8.
In such a setting of the front fastening position FP, the second fastening hole 9f is arranged immediately below the opening 22 (below the buckle member 10 in the forward tilted posture indicated by a two-dot broken line in the figure).

Therefore, an air tool (not shown) is inserted into the opening 22 of the shield member 20 and the front fastening position FP is fastened. At this time, the buckle member 10 in the forward tilting posture becomes an obstacle.
For this reason, in this embodiment, by using a frame fastening structure described later, interference of the buckle member 10 is eliminated as much as possible, and the bracket 6aF is fastened at a desired position. Hereinafter, each component will be described.

[Frame fastening structure]
The frame fastening structure of the present embodiment is described later with reference to FIG. 2 and FIG. 3. The shield member 20 (extended opening portion 24) that allows the buckle member 10 to tilt backward and the buckle member 10 that regulates the backward tilt of the buckle member 10 will be described later. A stopper member 30 is provided.
(Buckle member)
The buckle member 10 of the present embodiment includes a long flat arm 14 and a buckle body 12 (substantially rectangular in side view) provided at one end of the arm 14 with reference to FIG. On the rear edge of the arm portion 14, a stopper piece 16 (back tilt prevention surface) having a substantially L shape when viewed from above is provided. The stopper piece 16 is bent toward the side of the seat, and is configured to abut (surface contact) with a stopper member 30 described later when the buckle member 10 is tilted forward.
The other end side of the arm portion 14 is rotatably attached to the side surface of the bracket 6aF via a bolt member 74. The bolt member 74 is fitted with a spring member 18 (an example of an urging means). The spring member 18 urges the buckle member 10 in the backward tilt direction.

(Shield member)
Referring to FIG. 2, the shield member 20 (resin frame having a substantially convex shape when viewed from the side) is formed with a curved portion 28 that is gently curved (convex) from the upper portion thereof.
An opening 22 that extends to the front side of the seat is formed on the front side of the curved portion 28, and the buckle member 10 rotates and moves forward within the opening 22 (first rotation range FMR). (Refer to the dotted line state from the two-dot broken line state in the figure). The second fastening hole 9f described above is formed in the flange portion 9 immediately below the opening 22.
Further, an extended opening portion 24 that allows the buckle member 10 to tilt backward is formed in a communication state behind the opening 22. The buckle member 10 pivots within the extended opening portion 24 (second pivot range BMR) and comes into a backward tilted posture by contacting the curved portion 28 behind the buckle member 10 (from the two-dot broken line state in the figure). (See solid line status).

Then, referring to FIG. 2, the rear fastening position BP at the rear part of the bracket 6aF is fastened (first fastening hole 9b, fastening bolt member 76).
Next, the buckle member 10 is set in a backward tilted posture (solid line state), and the second fastening hole 9f below the buckle member 10 in the forward tilted posture (double-dotted line state) is exposed so as to be visible upward (work space for fastening work). Secure). Then, a tool such as an air tool (not shown) is inserted from the opening 22 to fasten the front fastening position FP (second fastening hole 9f, fastening bolt member 72).
In this way, the bracket 6aF is fastened to the vehicle compartment floor surface 70 in a well-balanced manner at the front and rear positions (first fastening hole 9b and second fastening hole 9f) of the rotating device 8. A stopper member 30 to be described later for restricting the backward tilt of the buckle member 10 is disposed on the bracket 6aF.

In this embodiment, a stopper member 30 to be described later is attached to the support member 50 disposed on the side surface of the bracket 6aF (see FIGS. 2 and 3A).
The support member 50 (a flat plate member having an approximately L shape when viewed from above) is disposed behind the buckle member 10 and is disposed on the side surface of the bracket 6aF. The support member 50 includes a fixed piece portion 52 fixed to the side surface of the bracket 6aF in a face-to-face manner, and a support piece portion 54 formed by bending the front edge of the fixed piece portion 52 to the side of the seat. A stopper member 30 described later is inserted into an insertion groove 56 (substantially U-shaped notch) provided in the support piece portion 54.

(Stopper member)
The stopper member 30 (substantially H-shaped when viewed from above) is provided with a stopper portion 32 (substantially rectangular shape) constituting a rearward tilt prevention surface and a substantially identical locking portion 36 with reference to FIG. . The stopper portion 32 and the locking portion 36 are connected by a connecting portion 34 (narrow), and the lower end of the locking portion 36 has a semicircular shape that can be easily inserted into the insertion groove 56 described above.
The stopper member 30 is an integrally molded product made of a material having rubber elasticity (preferably a thermoplastic elastomer). As will be described later, the stopper portion 32 of the stopper member 30 abuts against the stopper piece 16 of the buckle member 10 and elastically supports it.
Examples of the material having rubber elasticity described above include, for example, styrene elastomer (SBC), olefin elastomer (TPO), polyvinyl chloride elastomer (TPVC), urethane elastomer (TPU), polyester elastomer (TPEE), and polyamide. Examples thereof include a system elastomer (TPAE) and rubber.

And with reference to Fig.3 (a), the buckle member 10 is made into a front-down attitude, and the support member 50 behind buckle member 10 is exposed. Then, the stopper member 30 is inserted into the support member 50 (insertion groove 56) so that the stopper portion 32 faces the front side of the sheet.
Then, referring to FIG. 3B, when the buckle member 10 (biased in the backward tilt direction) is tilted forward to the forward tilt posture, the stopper piece 16 (back tilt prevention surface) is stopped by the stopper portion 32 (back tilt). Further contact with the blocking surface) prevents further rotation.
In this way, by restricting the backward tilt of the buckle member 10 by the stopper member 30, the buckle member 10 can be set in a desired forward tilt posture. Then, referring to FIG. 4, the buckle member 10 is rotationally moved in the first rotational range FMR by the rotational movement of the second rotational range BMR being restricted by the stopper member 30.

When the seat back 6 is moved forward, the forward buckling member 10 (two-dot broken line state) moves in the first rotation range FMR while being pressed by the seat back 6 and assumes the forward posture (solid line state). .
Further, by returning the seat back 6 to the self-supporting posture, the buckle member 10 (biased in the backward tilt direction) rotates in the first rotation range FMR and comes into contact with the stopper member 30 to be in the forward tilt posture. At this time, in this embodiment, even if the buckle member 10 is pivoted and moved at a considerable momentum, the stopper portion 32 is configured to elastically support the surface in contact with the buckle member 10, so that the backward tilting of the stopper member 30 is preferably prevented. Can do.
If the stopper member 30 is not disposed on the bracket 6aF, the buckle member 10 collides with the shield member 20 (curved portion 28) by returning the seat back 6 to the self-standing posture (see FIG. 3B). There is a risk of damaging the member.

As described above, according to the present embodiment, the interference of the buckle member 10 can be avoided as much as possible, the bracket 6aF (frame) can be fastened at a desired position, and the buckle member 10 can be in a desired posture. Can do.
With the above-described configuration, even if the buckle member 10 and the shield member 20 are configured as a unit product that is previously disposed on the bracket 6aF, the unit body is not neatly disassembled, and can be neatly handled as it is. Can be fastened (workability is improved). And the manufacturing cost of the vehicle seat 2 can be reduced by improving workability (reducing work time).

The frame fastening structure of the present embodiment is not limited to the above-described examples, and can take other various embodiments.
(1) The fastening structure of the present embodiment is not limited to the back frame 6F (bracket 6aF), and is preferably applied to a fastening structure of a frame (for example, a frame of the seat cushion 4) that is directly fastened to the passenger compartment floor surface 70. It is a possible technology.
Further, in the present embodiment, the frame of the vehicle seat 2 including the double folding mechanism is illustrated. However, as long as the structure is directly fastened to the passenger compartment floor surface, the double folding mechanism (rotating device 8 for moving forward) is provided. It can also be applied to a frame of a vehicle seat that does not exist.
(2) In the present embodiment, the example in which the buckle member 10 is exclusively attached to the side surface of the bracket 6aF (frame) has been described. This buckle member may be attached to any position of the frame as long as it can be rotated back and forth.
Moreover, in the present Example, the shield member 20 which coat | covers the bracket 6aF (frame) side surface was illustrated. The shield member may be configured to cover a part of the frame such as the side surface or the entire frame as long as the shield member has an opening for projecting the buckle member in the forward inclined posture.

(3) In the present embodiment, an example in which the buckle member 10 is biased in the backward tilt direction (an example in which the buckle member is more reliably set in a desired posture) has been described. Unlike this, the buckle member 10 may be simply configured to be pivotally attached to the side surface of the frame without being biased in the backward tilt direction.
In the present embodiment, the spring member 18 (simple configuration) has been described as the biasing means for the buckle member 10, but other spring members such as spring-like spring members and rubber members (string-like) are biased. It may be used as a means.

(4) In this embodiment, the example in which the stopper member 30 (stopper portion 32) is made of a material having rubber elasticity (the most suitable material) has been described. Unlike this, the stopper piece 16 of the buckle member 10 may be made of a material having rubber elasticity, and the stopper member 30 may be made of a metal material. That is, if at least one of the stopper portion 32 and the stopper piece 16 is made of a material having rubber elasticity, even when the urging force of the buckle member 10 is relatively strong (about 100 kg), the rotation operation is sufficiently performed. Can be regulated.
When the urging force of the buckle member 10 is relatively weak, at least one of the stopper member 30 and the stopper piece 16 can be made of a flexible material (for example, a soft resin).

(5) In the present embodiment, the example in which the stopper member 30 and the stopper piece 16 are in surface contact with each other (an example in which the rearward tilting of the buckle member is more reliably regulated) has been described. Unlike this, undulations (unevenness) may be provided on the contact surface of the stopper member 30 or the contact surface of the stopper piece 16.
In the present embodiment, the example in which the stopper member 30 is inserted into the support member 50 has been described. However, the stopper member 30 may be attached by physical means such as bolting, or adhesive means such as adhesive or fusion. I can take it.

(A)-(c) is a perspective view of a vehicle seat. It is a partial longitudinal cross-sectional view of the back frame of a self-supporting posture. (A) is a see-through perspective view of the frame with the buckle member in a forward-facing posture, and (b) is a see-through perspective view of the frame with the buckle member in a forward-tilting posture. It is a partial longitudinal cross-sectional view of the back frame of the forward leaning posture. It is a partial longitudinal cross-sectional view of a typical back frame.

Explanation of symbols

2 Vehicle seat 6F Back frame 6aF Bracket 8 Rotating device 9 Flange portion 9b First fastening hole 9f Second fastening hole 10 Buckle member 16 Stopped piece 18 Spring member 20 Shield member 22 Opening portion 24 Opening opening portion 28 Bending portion 30 Stopper member 32 Stopper part 34 Connecting part 36 Locking part 50 Support member 52 Fixed piece part 54 Support piece part 56 Insertion groove 70 Car interior floor

Claims (2)

A frame fastening structure for a vehicle seat in which a buckle member for a seat belt is projected in a forward inclined posture from an opening formed in a shield member that covers the frame of a vehicle seat, and then the frame is fastened to one surface of a passenger compartment. In
The buckle member is attached to the frame so as to be rotatable in the front-rear direction of the seat, and an extension opening portion is formed in the opening to allow the buckle member to be displaced from a forward tilt posture to a rear tilt posture.
A configuration in which a stopper member that regulates the backward tilting of the buckle member is disposed on the frame after the frame is fastened at a fastening position below the buckle member in the forward tilted posture, with the buckle member being in a backward tilted posture. A frame fastening structure for a vehicle seat. The buckle member is then urged in a tilting direction and attached to the frame,
2. The vehicle seat according to claim 1, wherein a rearward tilt preventing surface provided on the buckle member is brought into contact with a rearward tilt preventing surface provided on the stopper member to restrict the rearward tilt of the buckle member. Frame fastening structure.

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