JPH0342818Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a vehicle seat installed in an automobile or the like.

[Prior Art] Vehicle seats with backrests include fixed types in which the backrests are fixed to the seat, and foldable types in which the backrests can be tilted forward.
A foldable seat is, for example, a front seat for a two-door type automobile, in which the backrest is folded forward when a passenger in the rear seat gets in or out of the vehicle.

In order to manufacture the above two types of sheets using a common frame, a frame structure as illustrated in FIG. 6 can be considered.

First, this prior art will be explained. In FIG. 6, the seat frame 1 includes a pair of left and right side frames 2,
It has 3. At the rear portions of these side frame portions 2 and 3, upwardly convex support portions 5 and 6 are provided.
Further, nut portions 7 and 8 are provided on the mutually opposing surfaces of the side frame portions 2 and 3.
will be provided.

The backrest frame 10 also has a pair of left and right side frame parts 1.
1 and 12, and through holes 14 and 15 are formed at the lower end of each side frame portion 11 and 12. Furthermore, a pair of left and right support brackets 16 and 17 are welded above the through holes 14 and 15.

In order to manufacture, for example, a seat with a fixed backrest using the above-mentioned frame, support brackets 16 and 17 are attached to the support base part 5, as shown in FIG.
6 and weld them together, and weld the lower ends of the side frame parts 11 and 12 to the side frame parts 2 and 3 so that the through holes 14 and 15 are located at the positions of the nut parts 7 and 8. do. 18 and 19 indicate welded parts.

After the backrest frame 10 and the seat frame 1 are integrated by the above-described welding, a spring structure, pads, etc. (not shown) are attached, and the outside thereof is wrapped with a skin such as cloth or leather to perform so-called covering.

On the other hand, when manufacturing a seat with a foldable backrest, instead of welding, the hinge bolts are inserted into the through holes 14 and 15 and screwed into the nut parts 7 and 8, so that the hinge bolts can be inserted into the center. The backrest frame 10 is made rotatable. A locking mechanism is added to hold the backrest frame 10 in a predetermined upright position, and when the lock is released, the backrest frame 10 becomes free and falls forward.

In the case of this foldable seat, both frames 1,
Since the parts 10 are assembled to each other by hinge bolts without welding, it is possible to individually cover the seat frame 1 and the backrest frame 10 before performing this assembly work.

[Problem that the invention attempts to solve]

However, when manufacturing a seat with a fixed backrest, both frames 1 and 10 are welded together before covering, so a large and heavy integrated frame must be handled when covering. . As a result, more people are required for the work, and work efficiency is also poor.

[Means for solving problems]

The present invention is applied to a vehicle seat that includes a seat frame having a pair of left and right side frame portions, and a backrest frame disposed at the rear of the seat frame and having a pair of left and right side frame portions.

In the present invention, support portions are formed on each side frame portion of the seat frame, and a first support bracket is fixed to one of the support portions. Also,
A second support bracket in contact with the other support base is fixed to the side frame of the backrest frame. Furthermore, a first
A second transparent hole is formed in each of the side frames of the seat frame, and a shaft member such as a hinge bolt is passed through each of these holes to fix the shaft member to the side frame of the seat frame. The seat frame and the backrest frame are fixed to each other by opening a hole and passing a connecting member such as a bolt through the second through hole and fixing the connecting member to the first support bracket.

[Effect]

In the seat with the above configuration, the rearward load applied to the backrest frame (hereinafter referred to as rearward load)
is supported by the support base portion of the seat frame via a pair of left and right support brackets. Further, a forward load (hereinafter referred to as a front load) applied to the backrest frame is supported via a connecting member fixed to the first support bracket.

According to the above configuration, the backrest frame and the seat frame are connected by the pair of shaft members and the connecting member on one side, and both frames can be assembled without welding. The seat portion and the backrest can be covered separately, and then the seat portion and the backrest can be assembled. Therefore, the frame used during covering can be small and light, reducing the burden on workers and improving work efficiency.

In addition, when making a foldable seat, the first support bracket is not welded to the support base but is attached to the side frame of the backrest. Further, the lower part of the backrest frame is pivotally connected to the seat frame using a shaft member as in the case of a fixed type. In this way, the backrest frame becomes rotatable about the shaft member relative to the seat frame, and a foldable seat can also be obtained by using the same frame as the fixed type.

〔Example〕

In one embodiment shown in FIGS. 1 to 3, a metal seat frame 30 has a pair of left and right side frames 31 and 32, and these side frames 31 and 32 are connected to a front frame 33. It is connected to the rear frame portion 34. Further, upwardly convex support base portions 35 and 36 are integrally formed at the rear portions of the side frame portions 31 and 32, respectively. Further, nut portions 37 and 38 are provided on the inner surfaces of the side frame portions 31 and 32 that face each other.

At the rear of the seat frame 30, a backrest frame 4 is formed using, for example, metal pipe material.
0 is assigned. This backrest frame 40 has a pair of left and right side frame parts 41 and 42. The side frame parts 41 and 42 are connected by an upper frame part 43 and a lower frame part 44. The lower portions of the side frame portions 41 and 42 are flattened in the left-right direction. and side frame part 4
1 and 42, respectively, a first through hole 50,
51 is formed. Further, a second through hole 53 is formed in one side frame portion 42 and located above the first through hole 51 .

A first support bracket 55 is welded on one of the support bases 36 in advance. The support bracket 55 is, for example, press-molded from a sheet metal, and has a hole 56 formed in a part thereof, and a nut member 57 (see FIG. 2) is fixed to the back side of the hole 56.

Further, the second support bracket 60 that comes into contact with the other support base part 35 is press-formed in the same shape as the first support bracket 55, and is welded in advance to the other side frame part 41 of the backrest frame. has been done. The second support bracket 60 is positioned at the same height as the first support bracket 55, that is, at the second through hole 5.
It is welded to a height corresponding to 3.

The above seat frame 30 and backrest frame 4
0, before assembling these, pads, spring structures, etc. are attached separately in advance, and the outer skin such as cloth or leather is covered. Therefore, the frame that is handled during the covering work is not so large and its weight is such that it can be handled by one worker.

After the covering is completed, a hinge bolt 62, which is an example of a shaft member, is inserted into the first through hole 50, 51, respectively.
63 and screwed into the nut parts 37 and 38, the backrest frame 40 is connected to the seat frame 30. Further, a fixing bolt 65 as an example of a connecting member is inserted into the second through hole 53, and this bolt 65 is screwed into the nut member 57 of the first support bracket 55. Therefore, the seat frame 30 and the backrest frame 40 are integrated by the hinge bolts 62, 63 and the fixing bolt 65. A fixed seat is thus obtained.

In the fixed seat configured as described above, the rear load applied to the backrest is supported by the support base portions 35 and 36 via the support brackets 55 and 60 at two locations. Further, the front load is supported by the support base portion 36 via the fixing bolt 65 and the support bracket 55.

On the other hand, when manufacturing foldable seats, the fourth
As shown in the figure, the first support bracket 55 is fixed to the side frame portion 42 of the backrest frame by welding or the like. Stepped hinge bolts 62 and 63 are passed through the first through holes 50 and 51 as in the case of the fixed type, and the nut portions 3 of the seat frame are inserted.
7 and 38. In this state, the backrest frame 40 is rotatable in the front-rear direction of the seat around the hinge bolts 62 and 63.

A locking mechanism 7 for fixing the backrest frame 40 in a predetermined upright position (the state shown in FIG. 5)
0 is set. That is, a horizontally projecting hinge shaft 71 is attached to the outer surface of the support base part 36,
A lock lever 72 is rotatably attached to this hinge shaft 71. One end side of this lock lever 72 is
This is an operating section 74 for rotation operation by hand. The other end of the lock lever 72 is attached to the backrest frame 40.
It is a hook-shaped engaging portion 76 that can be engaged with and detached from a lock pin 75 that is provided protrudingly. The lock lever 72 is then moved to the engaging portion 76 by the torsion spring 78.
is biased in the direction of engagement with the lock pin 75.
Spring washer 80 and nut 81 are lock lever 7
It acts as a stopper for 2.

In the foldable seat having the above structure, the backrest frame 40 is held in the upright position by the lock lever 72 engaging with the lock pin 75, as shown in FIG. The rear load applied to the backrest frame 40 is transferred to the support brackets 55 and 6.
It is supported by support base parts 35 and 36 via 0. This point is the same as the fixed type. The front load is supported by the support base portion 36 via the lock pin 75 and the lock lever 72.

In the case of this foldable seat as well, the seat and backrest are individually covered in a process before the seat and backrest are assembled, as in the case of a fixed type.

[Effect of idea]

According to the invention, a common frame can be used for fixed and foldable seats. In addition, since the seat and backrest can be covered individually, there is no need to handle a heavy and large frame compared to conventional fixed seats that have to be covered while the seat and backrest are integrated. This makes covering work easier and improves work efficiency.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention, with Figure 1 being an exploded perspective view of the seat, Figure 2 being a perspective view of the support bracket seen from the back, and Figure 3 showing the assembled seat. FIG. Figures 4 and 5 are exploded perspective views and assembled perspective views of a folding seat using the frame shown in Figure 1, respectively, and Figures 6 and 7 are fixed seats according to the prior art, respectively. FIG. 2 is an exploded perspective view and a perspective view after assembly. 30...Seat frame, 31, 32...Side frame part, 35, 36...Support part, 37, 38...Nut part, 40...Backrest frame, 41, 42
...Side frame portion, 50, 51...First through hole, 53...
...Second through hole, 55...First support bracket, 57...Nut member, 60...Second support bracket, 62, 63...Hinge bolt (shaft member), 65...Fixing bolt (connection Element).

Claims (1)

[Scope of Claim for Utility Model Registration] A vehicle seat comprising a seat frame having a pair of left and right side frame portions, and a backrest frame disposed at the rear of the seat frame and having a pair of left and right side frame portions, A support base is provided on each side frame of the seat frame, a first support bracket is fixed to one of the support bases, and a second support bracket in contact with the other support base is attached to the backrest frame. Further, a first through hole is formed in each side frame of the back frame, and a shaft member is passed through each of these through holes and this shaft member is fixed to the side frame of the seat frame. , and a second through hole is formed in one side frame portion of the backrest frame, and a connecting member is passed through the second through hole and the connecting member is fixed to the first support bracket, thereby attaching the seat frame to the seat frame. A vehicle seat characterized in that a backrest frame and a backrest frame are fixed to each other.