JP2008238931A - Seat belt buckle mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat belt buckle mounting structure which provides a reasonable constitution by reducing the number of components for attaching a buckle of a seat belt device to a seat cushion. <P>SOLUTION: A buckle 5 forming a receiving piece of a seat belt device is fitted in a seat cushion. In the seat cushion, a side part on the inner side with the buckle 5 being arranged thereon is supported by a vehicle body floor by a supporting frame 50 which is formed of a plate in a bent manner. The supporting frame 50 comprises: a right surface part 52 fixed to the seat cushion; a lower surface part 51 fixed to an upper rail 10 (a vehicle body floor) of a slide mechanism 4; and a left surface part 53 with the buckle 5 being fitted thereto. The lower surface part 51 is folded back horizontally from a first fold-back part 50A hanging from the right surface part 52. The left surface part 53 is folded back directly upward of a second fold-back part 50B extending from the lower surface part 51 to the inner side with the buckle 5 being arranged thereon. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a seat belt buckle mounting structure. More specifically, the present invention relates to a seat belt buckle mounting structure for mounting a buckle, which is a receiving bracket of a seat belt device provided in a vehicle seat, to a seat cushion.

Generally, a seat belt device is provided in a vehicle seat as a safety device for restraining a seated occupant's body to a seated body position. This seat belt device pulls out a belt-like seat belt disposed on the outer side of a vehicle seat, and receives a tongue plate inserted into the seat belt on the inner side. (Buckle) can be inserted and installed. As a result, the seat belt device can hold the occupant's body in a state of being restrained by the drawn-out seat belt.
Here, the following Patent Document 1 discloses a technique regarding a skeleton structure of a seat cushion. In this disclosure, the seat cushion is fixed to the vehicle body floor by a support frame (side frame) integrally assembled to the skeleton portion. In this disclosure, a sliding mechanism in the front-rear direction is disposed between the seat cushion and the vehicle body floor, and the seat cushion is integrally fixed to the upper frame by the support frame described above.
And the buckle which is a receiving metal fitting of the seatbelt apparatus mentioned above is attached to a support frame via a bracket. The bracket is formed to be bent in an L shape so as to extend from the mounting position with the support frame to the inner side of the vehicle seat. Thereby, the buckle attached to this bracket is arrange | positioned in the position which protruded to the side part by the side of the inner side of a vehicle seat.

JP 2004-122825 A

  However, in the prior art disclosed above, since a bracket for attaching the buckle to the support frame is required as a separate part, the number of parts increases.

  The present invention has been devised to solve the above-described problems, and the problem to be solved by the present invention is to reduce the number of parts for assembling a seat belt device buckle to a seat cushion. To streamline.

In order to solve the above problems, the seat belt buckle mounting structure of the present invention takes the following means.
First, a first invention is a seat belt buckle mounting structure for mounting a buckle, which is a receiving bracket of a seat belt device disposed on a vehicle seat, to a seat cushion. The buckle is disposed at one side position in the width direction of the seat cushion. The seat cushion has a configuration in which one side portion on which the buckle is disposed is supported on the vehicle body floor by a support frame formed by bending a plate material. The support frame has a configuration including a cushion fixing surface portion that is fixed to the seat cushion, a floor fixing surface portion that is fixed to the vehicle body floor, and an extension surface portion due to its bent shape. The floor fixing surface portion is formed by being folded back in the horizontal direction from a first folded portion that hangs down from the cushion fixing surface portion. The extended surface portion is folded back in a directly upward direction from a second folded portion extending from the floor fixing surface portion to one side in the width direction where the buckle is disposed. A flat mounting plate integrally disposed on the buckle is attached to the extended surface portion formed on the support frame in a state where the plate surfaces are overlapped.
According to the first aspect of the present invention, the buckle that is the receiving bracket of the seat belt device is attached to the extended surface portion that is formed on the support frame that is the support component of the seat cushion. The extending surface portion is formed at a position extending from the floor fixing surface portion to one side in the width direction where the buckle is disposed, and the attached buckle is disposed at one side position in the width direction of the seat cushion. can do.

Next, according to a second aspect, in the first aspect described above, a slide mechanism capable of sliding the vehicle seat relative to the vehicle body floor is disposed between the vehicle seat and the vehicle body floor. ing. The slide mechanism has a lower rail and an upper rail. The lower rail is formed in an elongated shape in the sliding movement direction, and is fixed to the vehicle body floor. The upper rail is fixed to a floor fixing surface portion formed on the support frame, and is slidably fitted into the lower rail.
According to the second aspect of the invention, the support frame is configured as a support component that supports the seat cushion in which the slide mechanism is disposed between the support frame and the vehicle body floor.

Next, according to a third aspect, in the first or second aspect described above, the floor fixing surface portion formed on the support frame is connected to the vehicle body floor by bolt fastening. And the 2nd folding | turning site | part which is a folding | turning site | part from the floor fixed surface part to the extension surface part is set in the position spaced apart to the one side of the width direction in which a buckle is arrange | positioned rather than the bolt fastening site | part of a floor fixed surface part. Yes.
According to the third aspect of the invention, the extended surface portion is formed by being folded back from the second folded portion that is spaced apart from the bolt fastening portion of the floor fixing surface portion in the width direction. Therefore, when a force is applied in the direction in which the buckle is pulled up by the tension applied to the seat belt when the seat belt is mounted, bending deformation occurs at the surface portion between the bolt fastening portion and the second folding portion of the support frame. Thereby, said tensile force is elastically received by the surface part between a bolt fastening site | part and a 2nd folding | turning site | part.

The present invention can obtain the following effects by taking the above-described means.
First, according to the first aspect of the invention, the buckle of the seat belt device can be attached to the support frame that is a support component of the seat cushion, thereby reducing the number of parts required for assembling the buckle and rationalizing the configuration. be able to. The support frame can be formed relatively easily by folding back the extended surface portion for attaching the buckle at a position spaced apart from the cushion fixing surface portion by a predetermined dimension in the width direction.
Furthermore, according to the second invention, the buckle can be attached to the seat cushion configured to be slidable by the slide mechanism without increasing the number of parts.
Further, according to the third invention, the force with which the buckle attached to the support frame is pulled up when the seat belt is attached is caused by bending deformation of the surface portion between the bolt fastening portion and the second folding portion of the floor fixing surface portion. By being elastically received, the load applied to the attachment portion between the buckle and the support frame can be reduced.

  Embodiments of the best mode for carrying out the present invention will be described below with reference to the drawings.

First, the configuration of the seat belt buckle mounting structure of the first embodiment will be described with reference to FIGS.
Here, in FIG. 1, a schematic configuration of the entire vehicle seat 1 is shown in a perspective view. The vehicle seat 1 is disposed as a driver seat, and includes a seat back 2 serving as a backrest portion and a seat cushion 3 serving as a seating portion. A buckle 5 serving as a receiving bracket for a seat belt device (not shown) is disposed at a side position on the inner side (right side in the drawing) of the seat cushion 3. Here, the seat belt device pulls out a belt-like seat belt disposed on the outer side (the left side in the figure) of the vehicle seat 1 and uses a bracket to receive the tongue plate inserted into the seat belt. It can be inserted and attached to a certain buckle 5. As a result, the occupant's body can be held in a restrained state by the pulled-out seat belt.

The vehicular seat 1 is configured such that the slide position in the front-rear direction with respect to the vehicle body floor F can be adjusted by a pair of left and right slide mechanisms 4, 4 provided between the seat cushion 3 and the vehicle body floor F. . These slide mechanisms 4 and 4 are normally held in a locked state in which sliding movement in the front-rear direction of the vehicle seat 1 is restricted. The slide mechanisms 4 and 4 are operated to release the above-mentioned locked state all at once by performing a pull-up operation of the operation lever L disposed at a lower position on the front side of the seat cushion 3. .
Accordingly, when the operation lever L is pulled up, the slide mechanisms 4 and 4 are unlocked, so that the vehicle seat 1 can be slid in the front-rear direction. Each of the slide mechanisms 4 and 4 is returned to the locked state in which the slide movement of the vehicle seat 1 can be restricted again by stopping the pulling operation of the operation lever L.
Hereinafter, the structure of each slide mechanism 4 and 4 and its assembly structure will be described in detail. The slide mechanisms 4 and 4 are formed in a symmetrical shape on the left and right, but have substantially the same configuration. Therefore, hereinafter, only the configuration of the slide mechanism 4 on one side shown on the right side in FIG. 1 will be described.

Here, in FIG. 2, components of the slide mechanism 4 are shown in an exploded perspective view. The slide mechanism 4 includes an upper rail 10 and a lower rail 20 that are formed in a long shape in the front-rear direction as slide parts, and a lock member 30 for locking the slide movement of these slide parts.
The upper rail 10 which is the former slide part is assembled to the seat cushion 3 by a support frame 50 shown on the upper side in the drawing. And the lower rail 20 is integrally assembled | attached to the vehicle body floor F by the support tools 40F and 40R before and behind shown in the figure lower side. The lower rail 20 is formed in a shape having a U-shaped cross section and enclosed on both sides. The upper rail 10 is inserted into the lower rail 20 in the longitudinal direction from the front or rear opening in the longitudinal direction into the U-shaped enclosure. Accordingly, the upper rail 10 is guided to slide in the front-rear direction by the U-shaped enclosure shape of the lower rail 20. The state where the upper rail 10 is assembled to the lower rail 20 is shown in FIG.

Then, returning to FIG. 2, the lock member 30 which is the latter sliding movement lock part is assembled to the upper rail 10. The lock member 30 can be inserted through four through-holes 12H and a through-hole 13H formed through a right side surface portion 12R and a right fin surface portion 13R of the upper rail 10 which will be described later. The engaging claws 32 are formed. The operation lever L described above with reference to FIG. 1 is coupled to the operation arm 31 formed to extend in the shape of the arm of the lock member 30. Accordingly, the lock member 30 is operated in such a manner that each engagement claw 32 is inserted into and removed from each through hole 12H,... And through hole 13H,. It has become.
Specifically, as shown in FIG. 5, the lock member 30 is pivotally supported on the upper rail 10 by a connecting shaft 30R. The lock member 30 is normally urged to rotate counterclockwise in the figure by the urging force of a spring member (not shown) hooked between the lock member 30 and the upper rail 10. Thereby, the lock member 30 is normally urged in the insertion direction which penetrates each engagement nail | claw 32 ... and the through-hole 12H ... and the through-hole 13H ....

Here, referring back to FIG. 2, the four through holes 12H and the through holes 13H formed in the upper rail 10 described above are arranged in the longitudinal direction of the right side surface portion 12R and the right fin surface portion 13R of the upper rail 10. Are arranged at equal intervals so as to face each other. The lower rail 20 also has a plurality of through holes 24H, which can face each other with the four through holes 12H,... And the through holes 13H,. Is formed.
These through holes 24H are arranged at equal intervals along the longitudinal direction on the right turn surface portion 24R of the lower rail 20 at the same arrangement interval as the four through holes 12H and the through holes 13H. Yes. Thus, by sliding the upper rail 10 in the front-rear direction, the four through holes 12H... And the through holes 13H. Alignment is made at regular intervals with respect to the hole shape of the holes 24H.

Therefore, as shown in FIG. 5, by sliding the upper rail 10, the above-described hole shapes between the upper rail 10 and the lower rail 20 are matched with each other in the front-rear direction, so that the lock member 30 is attached to the lock member 30. The engaging claws 32... Are inserted through the hole shapes by the force, and are held in the inserted state (shown by the solid line). As a result, the upper rail 10 is in a state where the engaging claws 32... Of the lock member 30 are engaged with the lower rail 20, and the sliding movement in the front-rear direction is restricted.
In other words, the upper rail 10 is always held before the operation lever L is pulled up, and is locked by the lock member 30 so that sliding movement in the front-rear direction is restricted. The upper rail 10 is switched to a state in which the upper rail 10 can slide and move in the front-rear direction because the lock state by the lock member 30 is released by performing an operation of pulling up the operation lever L.
As shown in FIG. 6, bearings K and K (ball bearings) are disposed on both outer sides of the right fin surface portion 13 </ b> R and the left fin surface portion 13 </ b> L of the upper rail 10. Thereby, the sliding movement of the upper rail 10 with respect to the lower rail 20 can be performed smoothly.

  Therefore, referring to FIG. 1, when the upper rail 10 is slid in the front-rear direction with the operation lever L pulled up, the slide position in the front-rear direction with respect to the vehicle body floor F of the vehicle seat 1 can be changed. If the lifting operation of the operation lever L is stopped after the slide position of the vehicle seat 1 is adjusted, the slide mechanisms 4 and 4 can be returned to the locked state and the vehicle seat 1 can be held at the adjusted slide position. it can.

Next, specific shapes of the upper rail 10 and the lower rail 20 will be described in detail.
First, the shape of the upper rail 10 will be described. As shown in FIG. 2, the upper rail 10 is formed in a cross-sectional shape that can be slidably fitted in the longitudinal direction with respect to the lower rail 20 having the U-shaped enclosure-shaped cross section described above. .
The upper rail 10 is formed in a certain cross-sectional shape as shown in the figure by bending a flat plate member made of steel material in some places. Specifically, the cross-sectional shape of the upper rail 10 is well shown in FIG. As shown in the figure, the upper rail 10 is flipped up outward from the flat plate-shaped upper surface portion 11, the flat plate-shaped right side surface portion 12 </ b> R and the left side surface portion 12 </ b> L that hang straight from both sides thereof. The right fin surface portion 13R and the left fin surface portion 13L are formed in a cross-sectional shape. Returning to FIG. 2, four through holes 12H,... And through holes 13H,... Penetrated in the plate thickness direction are formed on the surface portions of the right side surface portion 12R and right fin surface portion 13R near the center in the front-rear direction. They are arranged in the width direction at equal intervals along the longitudinal direction.
A receiving port 15 for assembling the lock member 30 described above is formed in the upper surface portion 11 and the right side surface portion 12R at the surface portion near the center of the upper rail 10 in the front-rear direction.
A cap C capable of closing the opening shape is attached to the opening portion on the rear side in the longitudinal direction of the upper rail 10.

Next, the shape of the lower rail 20 will be described. As shown in FIG. 2, the lower rail 20 is formed in a cross-sectional shape having a U-shaped surrounding shape that can guide the upper rail 10 slidably in the front-rear direction.
The lower rail 20 is formed in a certain cross-sectional shape as shown in the figure by bending a single flat plate member made of steel material in some places. Specifically, the cross-sectional shape of the lower rail 20 is well shown in FIG. As shown in the figure, the lower rail 20 has a flat plate-shaped lower surface portion 21, flat plate-shaped right side surface portions 22R and left side surface portions 22L rising from both sides thereof, and a flat plate shape that is folded horizontally inward from the upper ends thereof. It is formed in a cross-sectional shape including upper surface portions 23R, 23L and flat right-turn surface portions 24R and left-turn surface portions 24L that hang straight from these inner ends. Then, referring back to FIG. 2, a plurality of through holes 24H... And through holes 24H. Is formed. The through holes 24H are formed in the left turn surface portion 24L so that the lower rail 20 can be used as a rail component for the right side or a left side of the vehicle seat 1. is there.

Next, returning to FIG. 2, the configuration of the support frame 50 fixed to the upper surface portion 11 of the upper rail 10 will be described.
The support frame 50 is formed in a cross-sectional shape in which both sides rise as shown in the figure by bending a flat plate member made of a steel material in some places. The lower surface 51 of the support frame 50 is fastened to the upper surface 11 of the upper rail 10 by a plurality of bolts B1... And nuts N. Here, the lower surface portion 51 corresponds to the floor fixing surface portion of the present invention.
The right side surface portion 52 rising on the left side of the support frame 50 in the drawing has link connecting holes 52F and 52R for link connecting the lower ends of the elevating links 60F and 60R at two positions on the front and rear sides. It is formed to penetrate in the thickness direction. As shown in FIG. 4, the elevating links 60F and 60R have their upper ends linked to the skeleton frame of the seat cushion 3. The elevating links 60F and 60R move the vehicle seat 1 up and down along with its pivoting motion. The position can be adjusted. Here, the right side surface portion 52 corresponds to the cushion fixing surface portion of the present invention.
Returning to FIG. 2, a buckle connecting hole 53H for attaching the buckle 5 which is a receiving bracket of the seat belt device described above is formed on the left side surface portion 53 rising on the right side of the support frame 50 in the figure. Is formed through. Here, the buckle 5 is inserted into the buckle connecting hole 53 </ b> H in a state where the flat mounting plate 5 </ b> A disposed integrally therewith is in contact with the outer surface of the left side surface portion 53 of the support frame 50. It is attached to the support frame 50 by being fastened by a bolt B2 and a nut W. Thereby, as shown in FIG. 1, the buckle 5 is arranged at the side position on the inner side (right side in the drawing) of the seat cushion 3. Here, the left side surface portion 53 corresponds to the extending surface portion of the present invention.

Here, the cross-sectional shape of the support frame 50 described above is well shown in FIG. 6, which is a cross-sectional view taken along the line VI-VI in FIG. As shown in the figure, the lower surface portion 51 is folded back in the horizontal direction (width direction) from the first folded portion 50A hanging down from the right side surface portion 52, which is the cushion fixing surface portion, to the left side (inner side) in the drawing. Is formed. Then, the left side surface portion 53 is formed to be folded back in a directly upward direction from a second folded portion 50B extending from the lower surface portion 51 to the left side in the figure.
The second folded portion 50B is set at a position separated to the left side (inner side) in the drawing from the bolt fastening portion 50C of the plurality of bolts B1... Fastened along the longitudinal direction of the lower surface portion 51 described above. Yes. Therefore, when the buckle 5 is attached to the left side surface portion 53 that is folded back at this position, when the seat belt is attached, if a force is applied in a direction in which the buckle 5 is pulled up by the tension applied to the seat belt, the lower surface portion 51 is provided. Bending deformation occurs at the surface portion between the bolt fastening portion 50C and the second folded portion 50B. Thereby, said tension | pulling force is elastically received by the surface part between 50 C of bolt fastening site | parts, and the 2nd folding | turning site | part 50B.

  The configuration of the front and rear support members 40F and 40R assembled to the lower surface portion 21 of the lower rail 20 will be briefly described. The support devices 40F and 40R are respectively connected to the lower surface portion 21 of the lower rail 20 by pins PF. And are integrally fixed. The front support 40F is integrally fixed to the vehicle body floor F by pins PL. The rear support 40R is fixed integrally with the vehicle body floor F by being assembled to a projecting pin (not shown) provided integrally with the vehicle body floor F.

Then, the usage method of a present Example is demonstrated.
That is, as shown in FIG. 1, the vehicular seat 1 is provided with a buckle 5 that serves as a receiving bracket of the seat belt device at a side position on the inner side (right side in the drawing) of the seat cushion 3. . Accordingly, a belt-like seat belt (not shown) disposed on the outer side (left side in the drawing) of the vehicle seat 1 is pulled out, and the tongue plate inserted through the seat belt is inserted into the buckle 5. By installing the tongue plate, the tongue plate can be fixed to the buckle 5. As a result, the occupant's body is held in a restrained state by the pulled-out seat belt.

Thus, according to the seat belt buckle mounting structure of the present embodiment, the buckle 5 of the seat belt device can be attached to the support frame 50 that is the support component of the seat cushion 3, so that the buckle 5 can be assembled. The number of parts can be reduced and the configuration can be rationalized. The support frame 50 can be formed relatively easily by folding the left side surface portion 53 (extending surface portion) to which the buckle 5 is attached at a position spaced apart from the right side surface portion 52 (cushion fixing surface portion) by a predetermined dimension in the width direction. it can.
Further, the buckle 5 can be attached to the seat cushion 3 configured to be slidable by the slide mechanisms 4 and 4 without increasing the number of parts.
Furthermore, the bending deformation of the surface portion between the bolt fastening portion 50C and the second folding portion 50B of the lower surface portion 21 (floor fixing surface portion) is caused by pulling up the buckle 5 attached to the support frame 50 when the seat belt is attached. Therefore, the load applied to the attachment portion between the buckle 5 and the support frame 50 can be reduced.

Although the embodiment of the present invention has been described with respect to one example, the present invention can be implemented in various forms in addition to the above-described example.
For example, the support frame that supports the seat cushion is configured to support the seat cushion with respect to the upper rail of the slide mechanism. However, in the case where the slide mechanism is not provided, the seat cushion can be directly supported on the vehicle body floor by the support frame.
Further, the connection between the support frame and the floor side member (upper frame or vehicle body floor) can be performed by a method other than bolt fastening such as welding.
Further, the cushion fixing surface portion of the support frame is formed so that the plate surface faces the extension surface portion perpendicularly to the extension surface portion, for example, in accordance with the support state of the seat cushion, instead of facing the plate surface to the extension surface portion. It may be.

1 is a perspective view illustrating a schematic configuration of a vehicle seat according to Embodiment 1. FIG. It is a disassembled perspective view of the support component of a vehicle seat. It is an assembly drawing of the support component of a vehicle seat. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. It is the VV sectional view taken on the line of FIG. It is the VI-VI sectional view taken on the line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 3 Seat cushion 4 Slide mechanism 5 Buckle 5A Mounting plate 10 Upper rail 11 Upper surface part 12R Right side surface part 12L Left side surface part 12H Through hole 13R Right fin surface part 13L Left fin surface part 13H Through hole 15 Lower entrance 21 Lower rail 21 Lower surface Portion 22R right side surface portion 22L left side surface portion 23R, 23L upper surface portion 24R right return surface portion 24L left return surface portion 24H through hole 30 lock member 30R connecting shaft 31 operating arm 32 engagement claw 40F, 40R support 50 support frame 50A first folding portion 50B Second turn-up part 50C Bolt fastening part 51 Lower surface part (floor fixing surface part)
52 Right side (cushion fixing surface)
52F, 52R Link connection hole 53 Left side surface (extending surface)
53H Buckle connection hole 60F, 60R Lifting link B1, B2 Bolt N Nut W Nut PF, PR Pin PL Pin C Cap F Body floor L Operation lever K Bearing

Claims (3)

A seat belt buckle mounting structure for mounting a buckle, which is a receiving bracket of a seat belt device disposed on a vehicle seat, to a seat cushion,
The buckle is disposed at a side position on one side in the width direction of the seat cushion,
The seat cushion has a configuration in which a side portion on one side where the buckle is disposed is supported on a vehicle body floor by a support frame formed by bending a plate material,
The support frame is a floor fixed to the vehicle body floor formed by folding back in a horizontal direction from a cushion fixing surface portion fixed to the seat cushion, and a first folded portion hanging from the cushion fixing surface portion, according to a bent shape. It has a configuration including a fixed surface portion, and an extended surface portion that is folded back from a second folded portion that extends from the floor fixed surface portion to one side in the width direction where the buckle is disposed. ,
A seat belt buckle mounting structure, wherein a flat mounting plate integrally disposed on the buckle is attached to the extended surface portion in a state where the plate surfaces are superposed. The seat belt buckle mounting structure according to claim 1,
Between the vehicle seat and the vehicle body floor, a slide mechanism capable of sliding the vehicle seat relative to the vehicle body floor is disposed,
In the slide mechanism, a lower rail formed in a long shape in a slide movement direction is fixed to the vehicle body floor, and an upper rail that is slidably fitted to the lower rail is fixed to a floor fixing surface portion of the support frame. A seat belt buckle mounting structure characterized by the above. The seat belt buckle mounting structure according to claim 1 or 2,
The floor fixing surface portion formed on the support frame is connected to the vehicle body floor by bolt fastening,
The second folding portion, which is the folding portion from the floor fixing surface portion to the extending surface portion, is set at a position spaced apart from one side in the width direction in which the buckle is disposed than the bolt fastening portion of the floor fixing surface portion. The seat belt buckle mounting structure is characterized in that

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