JPH10236190A - Hinge structure of seatback for folding seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate installation, in a cabin, of a seatback which is installed inside an automobile, a ship, an airplane or the like, in the hinge structure of a seatback for folding seat. SOLUTION: A shaft extending in the cross direction of a vehicle is formed at the lower end of seatbacks 2, 4 for a folding seat, and lower hinge brackets 12, 14, 16 provided with recessed parts 12b, 14b, 17b, 18b fitted to the shaft and having openings in the upward direction of the vehicle are formed at the floor 1 of the vehicle. This structure is also formed out of upper hinge brackets 22, 24, 26 provided with recessed parts 22b, 24b, 27b, 28b which rotatably-clamp shafts 6a, 6b, 8a, 8b in cooperation with the recessed parts 12b, 14b, 17b, 18b of the lower hinge brackets 12, 14, 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge structure for a seat back of a retractable seat mounted on a vehicle such as an automobile, a ship, an airplane, or a vehicle.

[0002]

2. Description of the Related Art At present, the above-mentioned folding seats of vehicles and vehicles are widely used in the above-mentioned vehicles and the like. In particular, in the case of automobiles, the vehicle interior and the luggage compartment are designed to communicate with each other as necessary. A folding trunk through seat back with split left and right seats is often used. When the retractable seat is fitted, for example, a seat cushion and a seat back are set and carried into the vehicle interior by a robot, and then manually attached to the floor in the vehicle interior.

[0003] For example, FIG. 3 shows a retractable seat in which a seat back is divided in a vehicle width direction and can be individually tilted in the front-rear direction of the vehicle. In addition, the seat backs 02 and 04 divided into the left and right sides in the vehicle width direction are provided at lower portions of left and right side portions 02a, 02b, 04a and 04b via pivot shafts 06 so as to be rotatable in the front-rear direction of the vehicle. Upper hinge bracket 0 of pivoted left seat back 02
8a, 08b and upper hinge brackets 010a, 010b of the right seat back 04 are provided.

The upper hinge brackets 08a and 08b of the left seat back 02 are connected to the pivot shaft 0, respectively.
6. The upwardly directed vertical part 01 of the vehicle attached to 6
2a, 012b and horizontal portions 016a, 016b having bolt holes 014 bent from the vertical portions 012a, 012b in an L-shape to the right in the vehicle width direction and abutting and coupled to a lower hinge bracket described later. It is configured.

[0005] Each of the upper hinge brackets 010a and 010b of the right seat back 04 also has a vertical portion 01 similarly to the left upper hinge brackets 08a and 08b.
8a and 018b and horizontal portions 020a and 020b having stud bolt holes 014.
0a and 020b are both vertical portions 018 as shown in FIG.
a, 018b so as to bend so as to face each other.

On the other hand, two stud bolts 021 fitted into the bolt holes 014 of the respective upper hinge brackets 08a, 08b, 010a, 010b are provided so as to face upward in the vehicle. 022, 024, and 026 are provided on the floor 01 of the vehicle indicated by a two-dot chain line in FIG. 3, and the lower hinge bracket 022 is provided so as to correspond to the upper hinge bracket 08a of the left seat back 02. The lower hinge bracket 024 is provided so as to correspond to the upper hinge bracket 010b of the right seat back 04.

Further, the lower bracket 026 is a common bracket for both upper hinge brackets 08b and 010a on the center side of the vehicle of the divided left and right seatbacks 02 and 04, and both upper hinge brackets 08.
b, 010a are provided on the floor 01 on the center side of the vehicle so that they can be attached in an overlapping manner. When the seat backs 02 and 04 are mounted, the right side portion 02a of the seat back 02 and the left side portion 04a of the seat back 04 conveyed into the vehicle cabin are supported so as to contact each other, and the left side seat back 02 is mounted on the vehicle. And the upper hinge bracket 010a on the right side of the seat back 04 overlaps the four bolt holes 014 of the horizontal portions 016b and 020a, and the lower hinge bracket 026. The two stud bolts 021 are fitted together and fastened by nuts 030 and fixed.

At the same time as the above, two bolt holes 014 of the upper hinge bracket 08a on the left side of the seat back 02 are provided.
Are fitted to the two stud bolts 021 of the lower hinge bracket 022, and the two bolt holes 014 of the upper hinge bracket 010b on the right side of the seat back 04 are fitted with the two stud bolts 02 of the lower hinge bracket 024.
1 and are fastened and fixed by nuts 030, respectively.

As another hinge structure of the seat back of the conventional retractable seat, although not shown, there is, for example, Japanese Utility Model Laid-Open No. 5-44673.

[0010]

When attaching the conventional retractable seat back shown in FIG. 3, first, the upper hinge bracket 08 of the left seat back 02 is mounted.
a, 08b are fitted to stud bolts 021 of lower hinge brackets 022, 026, respectively.
Further, the bolt holes 014 of the upper hinge brackets 010a and 010b of the right seat back 04 are fitted into the stud bolts 21 of the lower hinge brackets 024 and 026.

At this time, the right side portion 02a of the left seat back 02 and the left side portion 04 of the right seat back 04 are provided.
a, the two upper hinge brackets 08b and 010a on the center side of the vehicle are overlapped, and the bolt holes 014 are aligned with each other, so that the lower hinge bracket 02
No. 6 must be fitted to the two stud bolts 021.

The two bolt holes 014 of the horizontal portion 016a of the upper hinge bracket 08a provided on the left side surface portion 02b of the left seat back 02 are fitted to the two stud bolts 021 of the lower bracket 022. With the horizontal portion 020b of the upper hinge bracket 010b
Two bolt holes 014 in the lower hinge bracket 024
Must be fitted to the two stud bolts 021.

After positioning the left seat back 02 and the right seat back 04, six stud bolts 021 are fitted into the respective bolt holes 014 and fastened by nuts 030, and the seat backs 02, 0
4 is fixed to the floor 01. Accordingly, the upper hinge brackets 08a, 08b, 010a, 010b pivotally supported by the respective seatbacks 02, 04 are rotatable about the pivot shaft 06, and thus freely swing in the vehicle longitudinal direction. In particular, the two upper hinge brackets 08b and 010a on the center side must be overlapped and matched, but it is also a manual operation in a narrow cabin, and both seat backs 02 and 04 are heavy objects. Therefore, the above-mentioned four upper hinge brackets 08a, 08
b, 010a, and 010b are suppressed. In particular, when the two upper hinge brackets 08b and 010a on the center side in the vehicle width direction are supported while securing an overlapping position between the upper hinge brackets 08b and 010a, the work is required. The work efficiency is poor because it is complicated and requires many man-hours.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a shaft provided at a lower end portion of a seat back and extending in a vehicle width direction. A lower hinge bracket having a concave portion that opens upward is provided on the floor of the vehicle, and an upper hinge bracket that holds and pivots the shaft in cooperation with the lower hinge bracket is provided, so that It is an object of the present invention to provide a hinge structure for a seat back of a retractable seat that allows easy installation of a seat back in a vehicle compartment.

[0015]

According to a first aspect of the present invention, there is provided a hinge structure for a seat back of a retractable seat according to the present invention, wherein the seat back capable of tilting in at least one of the front and rear directions of the vehicle is provided. In a hinge structure for a seat back of a retractable seat fixed to a floor of a vehicle, a concave portion provided on the floor corresponding to both left and right side surfaces or a lower surface portion of the seat back in the vehicle width direction and opening upward in the vehicle. A lower hinge bracket provided with a shaft, which is fitted to the concave portion extending in the vehicle width direction at a lower end portion of the seat back, and a shaft provided to protrude in a radial direction of the shaft. Stopper means for abutting against a peripheral portion to restrict the movement of the seat back in the vehicle width direction, and the shaft rotatably holding the shaft in cooperation with the lower hinge bracket. It is characterized by comprising an upper hinge bracket.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention.
It is a schematic explanatory view showing the case where the hinge structure of the seat back of the foldable seat of the present invention is applied to the foldable seat divided into right and left.

As shown in FIG. 1, each of the divided left and right seatbacks 2 and 4 can be independently tilted in at least one of the front and rear directions of the vehicle. Shafts 6a, 6b and 8a, 8b projecting in the vehicle width direction are provided at the lower end of each side surface.
Is provided. The shafts 6a, 6b and 8
On the floor 1 of the vehicle with respect to a and 8b, lower hinge brackets 12, 14, and 16 which are fixed by bolts and nuts, welding, and the like (not shown) are provided.

The lower hinge brackets 12, 14 on the outer sides of the seat backs 2, 4 in the vehicle width direction have openings in the upper direction of the vehicle, and are a part of a pivot portion to be fitted to the shafts 6a, 8b. And vertical portions 12a, 14a having concave portions 12b, 14b, each of which is bent toward the center in the vehicle width direction with respect to the vertical portions 12a, 14a, and is connected to the floor 1 by one stud bolt 20 each. Horizontal section 12 with
c and 14c.

The lower hinge bracket 16 fixed to the floor 1 corresponding to the shafts 6b, 8a on the center side in the vehicle width direction of the seat backs 2, 4 is common to the shafts 6b, 8a. The lower hinge bracket 16 has a U-shaped hinge bracket formed integrally therewith, and the lower hinge bracket 16 has a U-shaped opposed vertical portion 17 a, 18.
a is disposed so as to face upward of the vehicle and extend in the front-rear direction of the vehicle.
8a connecting the horizontal portions 16c.
Is provided with a stud bolt 20 as described above.

The vertical portions 17a and 18a have
Concave portions 17b and 18b which are open to the upper direction of the vehicle and are fitted to the shafts 6b and 8a are provided. Also, the concave portions 12b, 14 of the lower hinge brackets 12, 14, 16
shafts 6a, 6 fitted to b, 17b, 18b
b, 8a, 8b, the lower hinge bracket 12,
The recesses 22b, 24b, which open downward to the vehicle so as to be rotatably clamped in cooperation with 14, 16;
Upper hinge bracket 22 having 27b, 28b,
24 and 26 are provided.

The upper hinge brackets 22, 2
4 is a vertical part 1 of the lower hinge brackets 12, 14.
The vertical portions 22a, 24a having the concave portions 22b, 24b which cooperate with the concave portions 12b, 14b of the 2a, 14a to rotatably clamp the shafts 6a, 8b and open downward in the vehicle.
And horizontal portions 22c, 24 each having one bolt hole 23, which is bent in an L-shape from both vertical portions 22a, 24a toward the center side of the vehicle to fit the stud bolt 20 therein.
c.

The shafts 6b and 8a fitted into the concave portions 17b and 18b of the vertical portions 17a and 18a of the lower hinge bracket 16 provided at the center in the vehicle width direction are connected to the vertical portions 27a of the upper hinge bracket 26. , 28a cooperate with the concave portions 27b, 28b opening downward in the vehicle and the concave portions 17b, 18b so as to be rotatably clamped, and are pivotally supported so that one of the horizontal portions 16c of the lower hinge bracket 16 can be rotated. One bolt hole 23 of the upper hinge bracket 26 is fitted to the stud bolt 20, and finally the nuts 30a, 30b, 30c are fitted to the stud bolts 20 of the lower hinge brackets 12, 14, 16 as shown in FIG. It is screwed and fastened and fixed.

The shafts 6a, 6b are provided so as to project in the diametrical direction, and come into contact with the peripheral edges of the recesses 12b, 22b and 17a, 27b to restrict the movement of the seat back 2 in the vehicle width direction. Stoppers S1 and S2, which are formed to be larger than the diameters of the shafts 6a and 6b, and constitute the stopper means S. The stopper S1 is attached to the lower hinge bracket 1 at the time of assembly.
2 and vertical portions 12a, 22 of upper hinge bracket 22
a) to be in contact with the left side surface of the vehicle, and the stopper S2 to be in contact with the right side surfaces of the vertical portions 17a, 27a of the lower hinge bracket 16 and the upper hinge bracket 26. This restricts the movement in the vehicle width direction.

The shafts 8a, 8b of the seat back 4
The stoppers S3 and S4 are configured similarly to the stoppers S1 and S2, and restrict the movement in the vehicle width direction. Since the present embodiment is configured as described above, first, the lower hinge brackets 12, 14, 16 are attached to the floor 1 of the vehicle set according to specifications by bolts, welding, and the like (not shown).

The lower ends of the side surfaces 2a, 2b, 4a, 4b in the vehicle width direction of the left and right seat backs 2, 4 of the retractable seat carried into the vehicle interior of the vehicle. The shafts 6a, 6b and 8a, 8b provided so as to protrude in the vehicle width direction are simply moved downward from above the vehicle to the concave portions 12b, 17b, and 14b, 18b of the lower hinge brackets 12, 14, 16. What is necessary is just to mount so that it may fit.

Further, the recesses 22b, 24b, 27b, 2 of the respective upper hinge brackets 22, 24, 26 are described.
8b and the concave portion 1 of the lower hinge brackets 12, 14, 16
2b, 14b, 17b, 18b, the shafts 6a, 6b and 8a, 8b are pivotally supported so as to be clamped, and one bolt hole 23 of each of the upper hinge brackets 22, 24, 26 is inserted into the lower hinge bracket. 1
Each of the stud bolts 2, 14, 16 can be fitted to one of the stud bolts 20 and fastened by the nuts 30a to 30c. Therefore, the fastening and fixing can be performed extremely easily as compared with the conventional example. .

At this time, the shafts 6a, 6b and 8a, 8
b denotes side surfaces 2a, 2b at the lower ends of the seatbacks 2, 4.
4A and 4B, the positioning is easy at the time of mounting, and the heavy weight of the seat back 2, 4
But it can be mounted very easily. Next, an application example of the above embodiment will be described with reference to FIG.

In the above embodiment, the shafts 6a, 6b and 8a, 8b are connected to the side portions 2 at the lower ends of the seat backs 2, 4.
a, 2b, 4a, and 4b are provided so as to protrude. In the present application example, as shown in FIG. Since the hinge structures of the seat backs 2 and 4 are substantially the same, the seat back 2 and the shafts 6a and 6b shown in FIG. 1 described in the above embodiment will be described.

The lower hinge bracket 12,
14 and the upper hinge brackets 22 and 24 can be the same as those described in the above embodiment, and therefore detailed description is omitted, and different points from the above embodiment are denoted by the same reference numerals for substantially the same portions. explain. U-shaped notches 40, 50 that open downward in the vehicle are provided on the lower surface between the left and right side surfaces 2 a, 2 b in the vehicle width direction of the seat back 2. Shafts 9a and 9b having stoppers S5 and S6, which are stopper means S extending in the vehicle width direction, are separately provided in the shaft 50, respectively. As shown, both shafts 9a and 9b may be integrally formed shafts.

Since the above application example is configured as described above, the lower hinge bracket 1 is similar to the above embodiment.
2 and 14 are mounted on the floor 1, and the shafts 9a and 9b of the seat back 2 carried into the vehicle interior of the vehicle are simply fitted into the concave portions 12b and 14b of the lower hinge brackets 12 and 14 from above to below. Thereafter, the respective upper hinge brackets 22, 24 are disposed in the same manner as in the above embodiment, and the respective upper hinge brackets 22, 24 are provided.
Of each of the lower hinge bracket 1
2 and 14 are fitted to the stud bolts 20 and nuts 30
a and 30b for fastening and fixing.

Also in this application example, the shafts 9a and 9b
Is fixedly attached to the seat back 2 and has the stoppers S5 and S6, so that substantially the same operation and effect as in the above embodiment can be achieved. In this application example, when the seat back 2 is mounted, the shafts 9a and 9b and the lower hinge brackets 12 and 14 are exposed and located at a position that is easy to see from above the seat back 2, so that the stud bolts of the upper hinge brackets 22 and 24 are provided. 20 and the fastening by the nuts 30a and 30b become extremely easy.

In the above-mentioned application, the shafts 9a, 9b
Are notches 40, 5 provided on the lower surface of the seat back 2.
0, a U-shaped shaft extending from a lower end of the seat back 2, for example, from a frame (not shown) of the seat back 2 as shown by a two-dot chain line in FIG. 11a and 11b, and the shafts 11a and 11b are provided.
11b, the lower hinge brackets 12, 1 as described above.
4 and upper hinge brackets 22, 24, nut 30
According to a and 30b, substantially the same operation and effects as those of the above-mentioned application example can be obtained even when the above-mentioned application example is attached.

In addition, the stoppers S1 to S6, which are the stopper means S of the above-described embodiment and application examples, include shafts 6a, 6b,
The large-diameter portion formed integrally with the shaft has a diameter larger than the diameters of 8a, 8b, 9a, 9b, 11a, and 11b. However, the present invention is not limited to this. The movement of the seat back 2 in the vehicle width direction can be restricted by a nut that is screwed to each end of each shaft or a snap ring attached to a groove provided at the end of each shaft.

Further, even when the configuration of the application example is applied to the seat back 4 on the right side, the same operation and effect as the application example can be obtained. Further, a configuration in which the above-described embodiment shown in FIG. 1 and the application example shown in FIG. 2 are combined may be adopted.
That is, the lower hinge bracket 16, the upper hinge bracket 26, the shaft 6b, the lower hinge bracket 16 similar to the embodiment shown in FIG.
8a and nuts 30c, the side of each of the above-mentioned seat backs 2 and 4 of the vehicle is connected to the upper hinge brackets 22 and 24 and the lower hinge brackets 12 and 1 shown in FIG.
Even with the support structure composed of 4 or the like, the same operation and effect as those of the above-described embodiment and application examples can be obtained.

In the above-described embodiment, the folding seat divided in the vehicle width direction has been described. However, the present invention can be applied to a so-called bench seat in which left and right undivided seats are integrally formed. The same operation and effect as the embodiment can be obtained.

[0036]

As described above in detail, according to the hinge structure of the seat back of the retractable seat according to the first aspect of the present invention, the seat back can be tilted in at least one of the front and rear directions of the vehicle. In the hinge structure of the seat back of the retractable seat for fixing the seat back to the floor of the vehicle, the seat back being provided on the floor corresponding to the left and right side surfaces or the lower surface in the vehicle width direction of the seat back and opening upward in the vehicle. A lower hinge bracket provided with a concave portion to be provided, a shaft inserted into the concave portion extending in a vehicle width direction at a lower end portion of the seat back, and the concave portion provided so as to protrude in a radial direction of the shaft. Stopper means for abutting against the peripheral edge of the seat back to restrict the movement of the seat back in the vehicle width direction, and cooperating with the lower hinge bracket to rotatably clamp the shaft. Since the upper hinge bracket is provided, each of the non-swinging shafts provided at the lower end portion such as the side surface or the lower surface of the seat back of the retractable seat carried into the vehicle compartment of the vehicle is simply referred to as the above. It is only necessary to mount the lower hinge bracket from the upper part of the vehicle downward so as to fit into the respective concave parts of the lower hinge bracket.

Further, the shaft is pivotally supported so as to be rotatable by the recesses of the upper hinge brackets and the recesses of the lower hinge brackets, and one bolt hole of each of the upper hinge brackets is provided. Can be fitted to one stud bolt of each of the lower hinge brackets and fastened with nuts.
Fastening and fixing can be performed very easily as compared with the above-described conventional example.

At this time, since the shaft is provided at the lower end of each of the above-mentioned seat backs so as not to swing, even a heavy seat back can be arranged very easily.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is a schematic explanatory view showing a case where a hinge structure of a seat back of a folding seat according to the invention is applied to a folding seat divided into right and left.

FIG. 2 is an explanatory diagram showing an application example of the embodiment of the present invention in FIG. 1;

FIG. 3 is a schematic explanatory view showing a hinge structure of a seat back of a conventional retractable seat.

[Explanation of symbols]

 1 floor 2 left seat back 4 right seat back 6a, 6b shaft 8a, 8b shaft 9a, 9b shaft 11a, 11b shaft 12, 14, 16 lower hinge bracket 12b, 14b recess 14c16c horizontal part 17a, 18b vertical part 17b, 18b recess 20 stud bolt 22, 24, 26 upper hinge bracket 27a, 28a vertical portion 22b, 24b recess 22c, 26c horizontal portion 27b, 28b recess S stopper means S1-6 stopper

Claims (1)

[Claims] 1. A hinge structure for a seat back of a retractable seat for fixing a seat back which can be tilted in at least one of a front-rear direction of a vehicle to a floor of the vehicle, wherein the seat back in the vehicle width direction is provided. A lower hinge bracket provided on the floor corresponding to the left or right side surface portion or the lower surface portion and provided with a concave portion opening upward in the vehicle; and the concave portion extending in a vehicle width direction at a lower end portion of the seat back. A stopper which is provided so as to protrude in a radial direction of the shaft, and abuts against a peripheral portion of the concave portion to restrict the movement of the seat back in the vehicle width direction; and the lower hinge bracket. A hinge structure for a seat back of a retractable seat, comprising: an upper hinge bracket for rotatably holding the shaft in cooperation with the seat. .