JP6129717B2 - Mounting structure for vehicle seat back - Google Patents

Description

  The present invention relates to a seat back mounting structure for a vehicle seat mounted on a vehicle such as an automobile, an airplane, a ship, and a train.

  There is a vehicle seat having a structure in which a seat back is directly attached to a vehicle body side member such as a floor separately from a seat cushion. The seat back described in Patent Document 1 is configured by assembling an upper portion and a lower portion via a recliner, and a flange portion provided with a bolt fastening hole along the floor surface is provided in the lower portion. Yes. The flange portion is provided toward the outer side of the seat back with respect to the vertical wall portion of the lower portion main body to which the recliner is attached. However, in some cases, the flange portion must be provided in the inner direction of the seat back in relation to other adjacent seat backs.

JP 2002-209666 A

In the technique disclosed in Patent Document 1, when the seat back is bolted to the floor, the lower portion flange portion is provided on the outer side of the seat back, so that the bolt tightening tool is bolted from above. When trying to operate by hitting, the seat back does not get in the way and there is no problem in workability. However, when the flange portion is arranged toward the inner side of the seat back for the reason described above, there is a problem that if the tool for tightening the bolt is applied to the bolt from the top, it interferes with the seat back. Therefore, operate the recliner to a position where it does not interfere, change the relative angle of the lower part and the upper part so that the upper part does not interfere with the bolt tightening operation, the seat back seater side and the seater opposite side I had to work from two directions. In particular, when the recliner is an electric power recliner, there is a problem that the tilting operation takes time and the workability becomes very bad.
In view of such problems, an object of the present invention is to perform a bolt tightening operation from one side of the seat back without operating the recliner in a seat back having a structure in which the upper portion and the lower portion are attached via the recliner. An object of the present invention is to provide a vehicle seat back mounting structure with good characteristics.

According to a first aspect of the present invention, there is provided a vehicle seat back mounting structure in which an upper frame is tiltably mounted to a pair of lower frames via a recliner, and at least one of the lower frames includes a vehicle body. When a plurality of bolt fixing holes are provided in the side member, and the bolt is fastened to the vehicle body side member in the state where the upper frame is in the standard seating state of the seated person in any of the bolt fixing holes. The bolt fixing hole and the corresponding hole so that a line obtained by extending the axis of the bolt does not interfere with the components of the vehicle seat back and exists on either the seated person side or the opposite side of the seated person. A receiving surface for the vehicle body side member is provided.
According to the first aspect of the present invention, when the vehicle seat back is fixed to the floor side, the upper frame is placed in the standard seating state of the seated person in any bolt fixing hole provided in the lower frame with respect to the vehicle body side member. When the bolts are fastened, the bolt fixing holes and the corresponding bolt extension holes correspond to the extension of the axis of the bolts that are fastened so that they do not interfere with the seat back components and exist on either the seated person side or the opposite side of the seated person. Since the receiving surface of the vehicle body side member is provided, the tightening tool can be applied to all the bolts from either the seated person side of the vehicle seat back or the side opposite to the seated person. Therefore, bolts can be tightened from either the seated side of the vehicle seat back or the side opposite to the seated person without changing the angle of the upper frame with respect to the lower frame by operating the recliner. Is good.

According to a second aspect of the present invention, in the first aspect, the lower frame is a plate-shaped member having a main body portion that is L-shaped or inverted L-shaped in a side view, and the recliner is attached to an upper portion of the main body portion. A flange portion bent in a direction orthogonal to the main body portion is provided at a lower end portion of the main body portion, and the bolt fixing hole is provided in the flange portion.
According to the second invention, the main body is a plate-like member having an L-shape or an inverted L-shape in side view, the recliner is attached to the upper portion of the main body, and the lower end of the main body is bent in a direction perpendicular to the main body. The vehicle seat back is seated without changing the angle of the upper frame with respect to the lower frame by operating the recliner as in the first aspect of the invention. The bolt can be tightened from either the person side or the side opposite the seated person.

It is a perspective view of one embodiment of the present invention. It is a side view of the said embodiment.

  1-2 illustrate one embodiment of the present invention. This embodiment shows an example in which the present invention is applied to an automobile seat back (hereinafter referred to as “seat back”). In each figure, each direction of the vehicle when the seat back is attached to the floor is indicated by an arrow. In the following description, the description regarding the direction is made based on this direction.

The seat back 1 of the present embodiment includes a back frame 10 serving as a skeleton. As shown in FIG. 1, the back frame 10 includes a lower frame 20 and an upper frame 30. The lower frame 20 includes a pair of lower frames 21 and a pipe-like lower pipe 22 connecting them. The upper frame 30 corresponds to an “upper frame” recited in the claims.
The upper frame 30 includes a pair of side frames 31, an upper pipe frame 32, and a connecting pipe 33. The side frame 31 is a plate-like member arranged in the left and right vertical directions, and ribs (standing walls) directed inward of the back frame 10 are provided at front and rear ends. The upper pipe frame 32 is a member obtained by bending a pipe having a circular cross section into a substantially U-shape, and is disposed so as to connect the upper ends of the side frames 31. The connecting pipe 33 is a pipe-shaped member having a circular cross section and connects the vicinity of the intermediate portion of the side frame 31. The upper ends of the pair of lower frames 21 and the lower ends of the pair of side frames 31 are assembled via a recliner 40, and the relative angle of the upper frame 30 with respect to the lower frame 20 can be set by operating the recliner 40. It is adjustable. The back frame 10 constitutes the seat back 1 by covering the upper frame 30 with a seat cover material such as a fabric via a cushion material that shows its outer shape with a two-dot chain line, and combined with a seat cushion (not shown) Support the seated person.

  As shown in FIGS. 1 and 2, the lower frame 21 is a plate-like member having a main body portion 21 </ b> A that is L-shaped in a side view, and the inner side of the back frame 10 is disposed at the end portion excluding the front end portion and the upper end portion. There is a rib (standing wall) going to. The lower rib 21b is wider than the upper rib 21a and the rear rib 21c, and is a horizontal portion 21b1 that is substantially horizontal from the front end, and a front step-like slope that slopes downward stepwise toward the rear. The portion 21b2 has a rear inclined portion 21b3 that is inclined upward toward the rear. The horizontal portion 21b1 has a front bolt hole 21d as a hole for fastening the bolt to the floor 50, and the rear inclined portion 21b3 has a rear bolt hole 21e as a hole for fastening the bolt to the floor 50. ing. The front bolt hole 21d and the rear bolt hole 21e are arranged on a line substantially along the front-rear direction with a line connecting the centers thereof. The front bolt hole 21d and the rear bolt hole 21e correspond to the “bolt fixing hole” recited in the claims. Furthermore, an extending portion 21f is provided at the front end portion of the lower rib 21b, and a locate pin 60 is attached thereto. The extending portion 21f is a surface that is lifted upward via the slope portion 21h from the surface where the front bolt hole 21d of the lower rib 21b is opened. The lower rib 21b corresponds to a “flange” described in the claims.

  When the lower frame 21 is attached to the floor 50, a substantially horizontal floor horizontal portion 50a is provided at a position corresponding to the horizontal portion 21b1 of the lower frame 21. There are a locate pin insertion hole 51 at a position corresponding to the locate pin 60 and a front nut hole 52 at a position corresponding to the front bolt hole 21d. A stud nut 54 is attached to the lower surface of the floor 50 of the front nut hole 52 coaxially with the front nut hole 52. At a position corresponding to the front step-like inclined portion 21b2 of the lower frame 21, a floor front inclined portion 50b is provided downward from the rear end of the floor horizontal portion 50a toward the rear. A floor rear inclined portion 50c is provided at a position corresponding to the rear inclined portion 21b3 of the lower frame 21. There, a rear nut hole 53 is opened at a position corresponding to the rear bolt hole 21e. A stud nut 54 is attached to the lower surface of the floor 50 of the rear nut hole 53 coaxially with the rear nut hole 53. The floor horizontal portion 50a and the floor rear inclined portion 50c correspond to the “receiving surface of the vehicle body side member” recited in the claims.

  A line L1 obtained by extending the axis of the bolt 70 tightened with the stud nut 54 on the lower surface of the front bolt hole 21d and the front nut hole 52 is substantially the same as the horizontal portion 21b1 of the lower frame 21 and the floor horizontal portion 50a. It rises vertically and does not interfere with the components of the seat back 1. Further, a line L2 obtained by extending the axis of the bolt 70 that tightens the stud nut 54 on the lower surface of the rear bolt hole 21e and the rear nut hole 53 is formed with respect to the rear inclined portion 21b3 and the floor rear inclined portion 50c of the lower frame 21. Thus, it rises almost vertically and does not interfere with the components of the seat back 1. At this time, the rear inclined portion 21b3 of the lower frame 21 and the floor rear inclined portion 50c are arranged so that the vertical lines drawn at the center axis positions of the rear bolt hole 21e and the rear nut hole 53 on the upper surface of the floor rear inclined portion 50c It is only necessary to determine the inclination angle so that it does not interfere with the other components, that is, within the range from L3 to L4. However, there is a possibility that some angle range adjustment may be made depending on the form of the tool for tightening the bolt 70.

  A method for attaching the seat back 1 to the floor 50 will be described. In order to attach the lower frame 21 to the floor 50, first, the locate pin 60 of the lower frame 21 is inserted into the locate pin insertion hole 51 of the floor 50. As a result, the lower frame 21 is positioned with respect to the floor 50. Next, the front bolt hole 21 d and the rear bolt hole 21 e of the lower frame 21 are respectively tightened with the bolts 70 in accordance with the front nut hole 52 and the rear nut hole 53 of the floor 50.

The present embodiment configured as described above has the following operational effects.
When attaching the seat back 1 to the floor 50, when the front bolt hole 21 d of the lower frame 21 and the front nut hole 52 of the floor 50 are bolted, the extension line L 1 of the axis of the bolt 70 after tightening is Since the horizontal portion 21b1 and the floor horizontal portion 50a of the lower frame 21 are set so as not to interfere with the components, the seat can be used without changing the angle with respect to the lower frame 20 in the state where the upper frame 30 is in the standard sitting state of the seated person. Bolts can be tightened from the seating surface side of the back 1. Further, when bolting the rear bolt hole 21e of the lower frame 21 and the rear nut hole 53 of the floor 50, the lower frame 21 is arranged so that the extension line L2 of the axial line of the bolt 70 after tightening does not interfere with the components of the seat back 1. Since the rear inclined portion 21b3 and the floor rear inclined portion 50c are set, the bolt from the seating surface side of the seat back 1 without changing the angle with respect to the lower frame 20 in a state where the upper frame 30 is in the standard sitting state of the seated person. Tightening work is possible. That is, in any bolt tightening portion, the bolt back can be tightened from one side of the seat back 1 without operating the recliner 40 and changing the angle of the upper frame 30 with respect to the lower frame 20. The workability of attaching to the floor 50 is good.
Further, the front bolt hole 21d and the rear bolt hole 21e of the lower frame 21 are seat backs 1 that are perpendicular to the main body 21A at the lower end of the main body 21A, which is a plate-like member having a reverse L-shape when viewed from the side. Since it is provided on the lower rib 21b bent in the inner direction, the structure is simple without requiring another member such as a bracket. With such a simple structure, the bolt tightening operation can be performed from one side on the seat back side of the seat back 1 without operating the recliner 40 and changing the angle of the upper frame 30 with respect to the lower frame 20. There is an effect that the mounting workability is good.

As mentioned above, although specific embodiment was described, this invention is not limited to those external appearances and structures, A various change, addition, and deletion are possible in the range which does not change the summary of this invention. For example,
1. In the said embodiment, although applied to the type which attaches the seat back 1 to the floor 50 from a seated person side, you may apply not only this but the type which attaches the seat back 1 from a seated person's other side. In this case, the lower frame 21 and the floor 50 are arranged so that the extension lines of the bolt shafts at the bolt fastening portions of the lower frame 21 and the floor 50 do not interfere with the components of the seat back 1 on the side opposite to the seat back 1 seat. The surface structure of the bolt fastening part will be made.
2. In the above embodiment, the present invention is applied to the case where the lower frame 21 is directly attached to the floor 50. However, the present invention is not limited to this, and the present invention can also be applied to the case where the lower frame 21 is attached to a bracket or a leg fixed on the floor 50.
3. In the above embodiment, the front bolt hole 21d and the rear bolt hole 21e of the lower frame 21 are arranged on a line substantially along the front-rear direction. However, the present invention is not limited thereto, and the front bolt hole 21d and the rear bolt hole 21e are not limited thereto. The line connecting the centers of the two may intersect at a predetermined angle with respect to the front-rear direction. Further, the flange portion provided with the front bolt hole 21d and the flange portion provided with the rear bolt hole 21e may be different, and the direction in which the flange portion is provided is also the main body portion 21A of the lower frame 21. May be in different directions. That is, the flange portion provided with the front bolt hole 21d is provided toward the outside of the back frame 10 with respect to the main body portion 21A, and the flange portion provided with the rear bolt hole 21e is provided with respect to the main body portion 21A. It may be provided inward. Moreover, the reverse may be sufficient.
4). In the above embodiment, the present invention is applied to an automobile seat, but may be applied to a seat mounted on an airplane, a ship, a train, or the like.

DESCRIPTION OF SYMBOLS 1 Seat back 10 Back frame 20 Lower frame 21 Lower frame 21A Main part 21b Lower rib (flange part)
21b1 Horizontal portion 21b3 Rear inclined portion 21d Front bolt hole (Bolt fixing hole)
21e Rear bolt hole (Bolt fixing hole)
30 Upper frame (upper frame)
40 Recliner 50 Floor 50a Floor horizontal part (receiving surface of body side member)
50c Floor rear inclined part (receiving surface of the vehicle body side member)
52 Front nut hole 53 Rear nut hole 70 Bolt L1 Line extending the bolt axis L2 Line extending the bolt axis

Claims (3)

A vehicle seat back mounting structure in which an upper frame is attached to a pair of lower frames via a recliner so as to be tiltable. At least one of the lower frames has a hole for fixing a bolt to a vehicle body side member. When the bolt is fastened to the vehicle body side member with the upper frame in the standard seating state of the seated person in any of the bolt fixing holes, the axis of the bolt is extended. The bolt fixing hole and the corresponding receiving surface of the vehicle body side member are provided so that the wire does not interfere with the components of the vehicle seat back and exists on either the seated side or the side opposite to the seated person. Has been
At least one of the bolt fixing holes has a line extending the axis of the bolt directly below the upper frame in a state where the upper frame is in a standard seated state of the seated person. A vehicle seat back mounting structure, wherein the vehicle seat back is inclined to the opposite side of the vehicle. 2. The line extending from the bolt axis of the bolt fixing hole provided immediately below the upper frame in a state where the upper frame is in a standard seating state for the seated person is a seater side of the upper frame. A vehicle seat back mounting structure characterized in that the vehicle seat is inclined. 3. The lower frame according to claim 1, wherein the lower frame is a plate-like member having a main body portion having an L shape or an inverted L shape in a side view, and the recliner is attached to an upper portion of the main body portion. A vehicle seat back comprising: a flange portion bent at an inner side of the vehicle seat back perpendicular to the main body portion, and the bolt fixing hole provided in the flange portion. Mounting structure.

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