JPH11105587A - Automobile seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate an assembling operation on a width directional frame of an intermediate frame. SOLUTION: A bottom frame 21 is made up of installing a pair of side frames 23, a pair of pipe frames 24 and 25 and intermediate frames 31 and 32, and the intermediate frame 3 is provided with a circular groove to be externally fitted in the rear pipe frame 25 at the rear side of a rear end underside part and a pair of insertional holes 35 installed toward the cross direction in front and in the rear in holding this circular groove between, and in a state that this groove is externally fitted in the rear pipe frame 25, a reinforced bracket covering an underside of the rear pipe frame 25 is installed there, and this reinforced bracket is provided with each pair of engaged projection pieces installed with engaged holes corresponding to the paired insertional holes 35 in front and in the rear end. In a state that the reinforced bracket covers the underside of the rear pipe frame 25 at the rear side, a locking pin 310 and an locking boss are inserted into each locking hole and the insertional hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat formed by connecting a seat back frame to a seat bottom frame, and more particularly, to a vehicle seat in which an assembling structure of the seat bottom frame is devised. It is about.

[0002]

2. Description of the Related Art Conventionally, there is known an automobile seat formed by attaching a seat back frame as a backrest to a rear end of a seat bottom frame as a seat. Each frame is fitted with a cushioning material, which makes the seat comfortable.

[0003] When the seat is a bench type seat for two or three people, the seat bottom frame comprises a pair of long frames in the vehicle width direction using a pipe material or an angle material, and the like. A pair of vehicle length direction frames bridged between the directional frames and an intermediate frame bridged between the center portions of the vehicle width direction frames are formed in a rectangular shape in plan view.

For the intermediate frame, a C-shaped angle member having a C-shaped cross section obtained by pressing a flat plate is usually employed. Notches are provided at both ends of the C-shaped angle material by cutting out a pair of widthwise side walls,
The notch portion is externally fitted to the front and rear vehicle width direction frames from above, so that the intermediate frame is fixed to the pair of front and rear vehicle width direction frames. Due to the presence of such an intermediate frame, the central portion of the long width direction frame is prevented from being bent, and the seat bottom frame is structurally strong.

[0005]

In the above-described conventional seat bottom frame, the cut-out portion of the intermediate frame is attached to the vehicle width direction frame by being fitted to the vehicle width direction frame. Therefore, it has a problem that it is easily detached and cannot play a role of reinforcement.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide an automobile seat capable of firmly connecting an intermediate frame and a vehicle width direction frame. I have.

[0007]

According to a first aspect of the present invention, there is provided an automobile seat having a seatback frame attached to a rear end of a seatbottom frame. A pair of vehicle width direction frames extending in the vehicle length direction, a pair of vehicle length direction frames extending in the vehicle width direction extending between front and rear ends of the pair of vehicle length direction frames, An intermediate frame bridged between intermediate positions of the pair of vehicle width direction frames, and the intermediate frame is
The rear end lower surface has an outer fitting groove externally fitted to the rear vehicle width direction frame, and a pair of insertion holes drilled in the width direction before and after the outer fitting groove, A bracket that covers a lower surface portion of the rear vehicle width direction frame in a state where the outer fitting groove is externally fitted to the rear vehicle width direction frame;
The bracket has a pair of locking projections formed with locking holes corresponding to the pair of insertion holes at front and rear ends, and the bracket covers a lower surface portion of the vehicle width direction frame on the rear side. In this state, a shaft is inserted through each of the locking holes and the insertion holes.

According to this vehicle seat, the lower portion of the vehicle width direction frame is covered with the bracket in a state where the outer fitting groove of the intermediate frame is fitted into the rear vehicle width direction frame, and a pair of engaging members in the front-rear direction are provided. The locking hole of the stop piece and the pair of insertion holes in the front-rear direction of the intermediate frame are opposed to each other, and the shaft is inserted into these holes, and the inserted state of the shaft is locked by a predetermined locking means, so that the vehicle width is reduced. The directional frame is fastened and clamped by the intermediate frame and the bracket, so that the intermediate frame is securely coupled to the vehicle width direction frame.

Then, by using the bracket,
Compared with the conventional connection structure in which the notch is simply fitted into the vehicle width direction frame, the connection state between the intermediate frame and the vehicle width direction frame is strengthened, and the seat bottom frame is structurally strong.

According to a second aspect of the present invention, there is provided an automobile seat according to the first aspect, wherein the frame of the seat back is connected to the frame of the seat bottom via the shaft. It is a feature.

According to this automobile seat, by using the shaft for connecting the seat back frame,
It is not necessary to use a separate coupling means for coupling the seat back, which contributes to a reduction in the number of parts.

[0012]

FIG. 1 is an exploded perspective view showing an embodiment of an automobile seat according to the present invention, and FIG. 2 is an assembled perspective view thereof. 1 and 2, the XX direction is referred to as a vehicle width direction, and the YY direction is referred to as a front-rear direction.
In particular, the -X direction is referred to as left, the + X direction as right, the -Y direction as front, and the + Y direction as rear. As shown in these figures,
The seat 1 includes a seat bottom 2 as a seat to be fixed to a floor F in a vehicle compartment, a seat belt support structure 4 attached to the seat bottom 2, and a back standing at a rear end of the seat bottom 2. It has a basic configuration including a seat back 5 as a backrest.

The seat bottom 2 is formed by supporting a bottom cushion 26 made of a cushion material on a bottom frame 21 as a framework. The bottom frame 21 includes a pair of sliders 22 mounted on the floor F in the passenger compartment, a pair of side frames 23 supported by the pair of sliders 22,
It comprises a front pipe frame 24 and a rear pipe frame 25 made of a pipe material bridged between the side frames 23, and an intermediate frame 3 bridged between the pipe frames 24,25.

The slider 22 comprises a pair of lower rails 22a fixed to the floor F with bolts in the vehicle width direction,
A pair of upper rails 22b, which are connected to the lower rails 22a so as to be able to move back and forth, and whose movement is normally restricted by a lock mechanism (not shown), is provided at the lower front part of the bottom frame 21. Rod 22c
By the predetermined operation, the restriction on the forward and backward movement of the upper rail 22b is released.

The side frame 23 is formed of a plate-like body whose edge is reinforced by being bent over substantially the entire circumference. Such a side frame 2
Numerals 3 are fixed in pairs on the pair of upper rails 22b in the vehicle width direction, and the front-rear position is adjusted by the front-rear movement of the upper rail 22b.

The front pipe frame 24 is bridged between the front positions of the pair of side frames 23, and the rear pipe frame 25 is bridged between the rear positions. It is formed in a rectangular shape when viewed. The intermediate frame 26
Is bridged between the front pipe frame 24 and the rear pipe frame 25 at the center in the vehicle width direction, thereby improving the rigid strength of the bottom frame 21.

The seat bottom 2 is formed by mounting the bottom cushion 26 on the bottom frame 21 configured as described above.

In the present embodiment, the seat back 5 includes a left seat back mounted on the left side of the intermediate frame 3 of the seat bottom 2 and a right seat back mounted on the same right side. Although arranged side by side with the bottom 2, FIG. 1 shows only the left seat back 5. Hereinafter, the seat back 5 will be described with the left side as a representative.

As shown in FIG. 1, the seat back 5 includes a back frame 51 having a predetermined shape, and a back cushion 55 supported by the back frame 51 and made of a cushion material. The back frame 51 has a pair of hinges 52 (a left hinge 52a and a right hinge 52b) projecting forward at the front lower end thereof. These hinges 52 include
At the lower edge, the rear pipe frame 25 of the seat bottom 2
An arc groove 53 having a radius of curvature equal to the diameter of the circular groove 53 is recessed, and a pair of mounting holes 54 are formed at front and rear positions across the arc groove 53.

At the upper edge of the right hinge 52b, there is provided a locking projection 55 projecting rightward. A mounting hole 54 is also formed in the locking projection 55. ing. Then, in a state where the left and right circular grooves 53 are fitted to the rear pipe frame 25, the left hinge 5 is utilized by using the respective circular grooves 53.
2a is fixed to the left side frame 23 and the right hinge 52b is fixed to the intermediate frame 3, so that the seat back 5 is attached to the seat bottom 2 as shown in FIG. I have.

FIG. 3 is a perspective view showing an embodiment of a fastening structure between the intermediate frame 3 and the rear pipe frame 25. FIG.
(B) shows a state in which the intermediate frame 3 is mounted on the rear pipe frame 25, respectively. In FIG. 3, the XX direction is the vehicle width direction,
The YY direction is referred to as the front-rear direction, and the −X direction is particularly leftward, +
The X direction is rightward, the -Y direction is forward, and the + Y direction is rearward.

As shown in FIG. 3, the intermediate frame 3 is formed by pressing a long metal flat plate. The intermediate frame 3 includes a flat plate portion 31 extending in the front-rear direction, and a pair of width direction side plate portions 32 formed by bending both side portions of the flat plate portion 31 in the width direction downward.
It consists of At the rear end of each side plate portion 32, an arc groove 33 having a radius of curvature equal to the diameter of the rear pipe frame 25 is recessed. Frame 3
Are connected to the rear pipe frame 25. On the rear end side of the side plate portion 32 of the intermediate frame 3, a front insertion hole 34 and a rear insertion hole 35 are formed before and after the rear pipe frame 25, respectively. Rear insertion hole 35
Has a diameter dimension slightly larger than that of the front insertion hole 34.

On the other hand, a reinforcing bracket 36 is provided for strengthening the coupling force of the intermediate frame 3 to the rear pipe frame 25. This reinforcement bracket 3
Reference numeral 6 denotes a reinforcing plate 37 whose width dimension is slightly smaller than that of the flat plate portion 31 of the intermediate frame 3, and a pair of engaging members each extending in the same direction from the front end and the rear end of the reinforcing plate 37. A stop projection 38 is provided, and a front engagement hole 38 a corresponding to the front insertion hole 34 of the intermediate frame 3 is formed in the front engagement projection 38, and a rear engagement projection 38 is formed in the rear engagement projection 38. A rear locking hole 38b corresponding to the rear insertion hole 35 of the intermediate frame 3 is formed.

The front locking hole 38a is inserted into the front insertion hole 3
4 and a pair of side plate portions 3 so that the rear locking holes 38 b face the rear insertion holes 35.
2, the front locking hole 38a and the front insertion hole 3
By inserting the locking pins 310 and the locking bosses 320 respectively into the intermediate frame 3 with the reinforcing bracket 36 sandwiching the rear pipe frame 25 under the tension of the reinforcing plate 37 as shown in FIG. Is to be fixed.

The locking pin 310 is connected to the front insertion hole 3.
Pin body 3 having a diameter slightly smaller than the diameter of 4
11, a flange 312 formed at the left end of the pin body 311, a left pin shaft 313 projecting concentrically with the pin body 311 toward the left from the flange 312, and concentric with the right end of the pin body 311. And a right pin shaft 314 projecting rightward. And the pin body 3
11 is inserted through the front insertion hole 34 and the front locking hole 38a, and the flange 312 is brought into contact with the side plate portion 32.
As shown in FIG. 3B, the length of the pin body 311 is set so that only the right pin shaft 314 protrudes rightward from the right side plate portion 32.

The locking boss 320 includes a boss body 321 having a diameter slightly smaller than the diameter of the rear insertion hole 35, and a flange 322 formed at the left end of the boss body 321. I have. Such a locking boss 3
A screw hole 323 concentric with the boss body 321 is threaded through the flange 20 from the flange 322 toward the boss body 321.

The locking pin 310 and the locking boss 3
20 is mounted on the intermediate frame 3, and the mounting pin 54 in the front of the right hinge 52 b of the seat back 5 is
The bolt B (FIG. 1) is screwed into the screw hole 323 with the mounting hole 54 on the rear side facing the screw hole 323 of the locking boss 320 while being externally fitted to the left pin shaft 313 of FIG. Thereby, the seat back 5 is mounted on the seat bottom 2.

At the rear end of each side frame 23, a mounting hole 23a corresponding to a pair of mounting holes 54 in the front-rear direction of each hinge 52 is formed, and the flat plate portion 31 of the intermediate frame 3 is formed. The right hinge 52
mounting hole 31 corresponding to the mounting hole 54 of the locking projection 55 of FIG.
a is screwed, and the bolt B is inserted through the mounting holes 23a, 31a and the mounting hole 54 in a state where the mounting hole 54 in front of the right hinge 52b is externally fitted to the left pin shaft 313 of the locking pin 310. The seat back 5 is screwed and fastened.
Are fixed to the seat bottom 2 via left and right hinges 52.

As shown in FIG. 1, the seat belt support structure 4 includes a pair of widthwise auxiliary frames 4 bridged between a front pipe frame 24 and a rear pipe frame 25.
1, a pair of widthwise anchor bars 42 disposed on the floor F so as to extend in the front-rear direction in the vicinity of the auxiliary frames 41, and interposed between the anchor bars 42 and the auxiliary frames 41. It has a basic configuration including a base plate 43 provided.

FIGS. 4A and 4B are views showing details of one embodiment of such a seat belt support structure 4, wherein FIG. 4A is an exploded perspective view, and FIG. FIG. 4 shows the seat belt support structure 4 on the right side of the XX coordinate reference. As shown in FIG. 4, a bracket 41 a is attached to the center of the auxiliary frame 41 on the side surface facing the anchor bar 42. The bracket 41a has a U-shape in a plan view, and both ends of the bracket 41a are welded to the auxiliary frame 41.

At the center upper edge of the bracket 41a, a pair of locking claws 41b (a large locking claw 410 on the rear side) projecting toward the anchor bar 42 are provided.
b and a small locking claw 411b) on the front side, and a nut 41c is welded to the upper portion between the locking claws 41b with the screw holes extending in the vehicle width direction.

The anchor bar 42 has a pair of flat portions 42a in the front-rear direction formed flat at both ends thereof, and a through hole 42b is formed in each flat portion 42a. A rear curved portion 42c curved downward is formed at a rear portion of the anchor bar 42, and the flat portion 42 on the rear side further rearward of the rear curved portion 42c.
a is provided. The front end of the anchor bar 42 is fixed to the floor F by screwing the bolt B to the floor F through the through hole 42b of the front flat part 42a. On the other hand, the flat portion 42 on the rear end side
a, the bolt B is connected to the floor F via the box-shaped bracket 44;
Is fixed to the floor F by being screwed to the floor F.

The box-shaped bracket 44 is formed in a box shape having an open upper surface and a rear surface, and a bottom plate 44a.
, A pair of side plates 44b in the width direction, and a front plate 44c. And the through hole 4 at the rear end of the anchor bar 42
The rear portion of the anchor bar 42 is fixed to the floor F by screwing the bolt B inserted through the bottom plate 44 a of the box-shaped bracket 44 to the floor F through the bottom plate 44 a. Further, the front plate 44c is set to have a height dimension that abuts on the rear curved portion 42c of the anchor bar 42, whereby the downward deformation of the rear curved portion 42c is effectively prevented.

Then, on the upper surface of the anchor bar 42,
A plurality of locking projections 42d are projected at a predetermined pitch, and a locking recess 42 is provided between adjacent locking projections 42d.
e is formed. The pitch dimension of the locking recess 42e is set in accordance with the pitch of the lock position of the upper rail 22b.

The base plate 43 is basically formed by pressing a metal flat plate into a U-shape. The base plate 43 has a U-shaped main body 43a and a left upper edge protruding leftward from the U-shaped main body 43a. Reinforced wing 43b provided
And are provided. The wing 43b is provided with a notch groove 43b 'for passing the seat belt 6 described later.

The U-shaped main body 43a is provided with a circular hole 43c penetrating the left and right side walls at the front part thereof, and a pair of square holes (stops) at the front and rear portions of the right circular hole 43c. A hole 43d is formed. The circular holes 43c are provided corresponding to the nuts 41c of the brackets 41a of the auxiliary frame 41, and the square holes 43d are formed by the respective locking claws 41b of the bracket 41a.
Is provided in correspondence with.

A spline shaft (locking shaft) 7 is inserted into the circular hole 43c and screwed to a nut 41c of the auxiliary frame 41, and a locking claw 41b is inserted into each square hole 43d. Then, the base plate 43 is moved, as shown in FIG.
It is configured to be fixed to the auxiliary frame 41.

The U-shaped body 43 of the base plate 43
A bush (belt fixing means) 45 in which a screw hole 45a is threaded at the axial center portion is inserted between the rear upper side walls of the base plate 4 so as to penetrate each side wall.
3 ensures that the anchor bar 42 is held securely, and the bush 45 supports the seat belt 6.

The seat belt 6 is fixed to the base plate 43 via a connection plate 61 having a connection hole 62. Specifically, the bolt B inserted into the connection hole 62
Is screwed into the screw hole 45 a of the bush 45 and fastened, whereby the seat belt 6 is connected to the base plate 43.

The spline shaft 7 includes a spline shaft main body 71 having a spline formed on the outer peripheral surface thereof, and a hexagonal head 72 formed at one end of the spline shaft main body 71.
And a threaded portion 73 having an external thread on the outer peripheral surface formed at the other end. By screwing the threaded portion 73 to the nut 41c of the auxiliary frame 41 in a state where the spline shaft main body 71 is inserted into the circular hole 43c,
The main body 43a is pressed and held between the head 72 and the nut 41c, and the base plate 43 is fixed to the auxiliary frame 41 via the bracket 41a.

When the spline shaft 7 is mounted on the base plate 43, the spline shaft main body 71 has a small gap between its lower end and the top of the locking projection 42d of the anchor bar 42. Thus, even if the base plate 43 moves back and forth by the back and forth movement of the bottom frame 21, the spline shaft body 7
1 and the locking projection 42d do not interfere with each other.

When a large tension is applied to the seat belt 6 due to an automobile collision or the like, the tension is transmitted to the base plate 43 via the connection plate 61 and the bush 45 in the state shown in FIG. This causes the base plate 43 to rotate clockwise around the spline shaft 7 while twisting and plastically deforming the pair of locking claws 41 b, so that the front end side of the base plate 43 contacts the lower surface of the anchor bar 42. Since the anchor bar 42 comes into contact with and lifts the anchor bar 42 upward, the anchor bar 42 uses the fastening portion of the rear flat portion 42a with the bolt B as a fulcrum and swells the front flat portion 42a upward via the bolt B. Rotate clockwise,
As a result, the locking recess 42e of the anchor bar 42 is fitted into the spline shaft main body 71, and the movement of the base plate 43 is prevented.

The U-shaped body 43 of the base plate 43
In the front end edge of “a”, a portion surrounding the anchor bar 42 is formed with a flapper edge 43f whose edges are sequentially expanded in a trumpet shape toward the distal end side. As a result, when the upward force is applied to the base plate 43, the curved surface of the flapper edge 43f comes into contact with the bottom surface of the anchor bar 42 and makes a surface contact. Thus, damage to the base plate 43 is effectively prevented.

The floor F is made of a steel plate having a very small thickness (for example, a thickness of 2 mm), so that when the distal end side of the anchor bar 42 rises, it is easy to bulge upward. I have.

The present invention relates to a sheet 1 as described above.
, A reinforcing bracket 36 is used for connecting the intermediate frame 3 and the rear pipe frame 25. Hereinafter, the operation of the reinforcing bracket 36 will be described with reference to FIG. 5A and 5B are explanatory views in a side view showing a coupling structure between the intermediate frame 3 and the rear pipe frame 25. FIG. 5A shows a state immediately before the reinforcing bracket 36 is mounted on the intermediate frame 3, and FIG. (C) shows a state in which the bracket 36 is mounted on the intermediate frame 3, and (C) shows a state in which the right hinge 52 b is mounted on the intermediate frame 3.

First, in the state shown in FIG.
The arc groove 33 of the intermediate frame 3 is formed in the rear pipe frame 25.
So that the intermediate frame 3 is connected to the rear pipe frame 25. However, in this state, the rear pipe frame 25 and the intermediate frame 3 are not integrally joined and may be temporarily fixed by spot welding or the like, but whether or not to perform the temporary fixing is optional.

Next, the reinforcing plate 37 of the reinforcing bracket 36
Is pressed against the lower surface of the rear pipe frame 25, the rear (left side in FIG. 5) locking projection 38 is fitted between the side plate portions 32 of the intermediate frame 3, and the front locking projection 38 is attached. Similarly, the rear locking hole 38b is fitted between the side plate portions 32 so that the rear locking hole 38b is inserted into the rear insertion hole 35 of the intermediate frame 3 and the front locking hole 38a.
Correspond to the front insertion hole 34.

Thereafter, the boss body 321 of the locking boss 320 is inserted into the rear insertion hole 35 and the rear locking hole 38b, and the pin main body 311 of the locking pin 310 is inserted into the front insertion hole 34 and the front locking hole 38a. By,
As shown in (b) of FIG. 5, the rear pipe frame 25 is clamped and fastened by the arc groove 33 of the intermediate frame 3 and the reinforcing bracket 36.

As described above, in the present invention, the intermediate frame 3 is connected to the rear pipe frame 25 through the arc groove 33.
In a state joined to the rear pipe frame 25, it is further connected to the rear pipe frame 25 by a reinforcing bracket 36 covering a lower portion of the rear pipe frame 25.
Compared to the case where the reinforcing bracket 36 is not used as in the conventional case, the connection state between the intermediate frame 3 and the rear pipe frame 25 is more secure, and even if a large force in the front-rear direction is applied to the intermediate frame 3, Separation of the frame 3 from the rear pipe frame 25 can be effectively prevented.

In this embodiment, the locking pins 310 and the locking bosses 320 mounted on the intermediate frame 3 are used for attaching the back frame 51 to the bottom frame 21. Hereinafter, attachment of the back frame 51 to the bottom frame 21 will be described.

The back frame 51 is connected to the bottom frame 21
First, as shown in FIG. 5B, the arc groove 53 of the hinge 52 is made to face the rear pipe frame 25 of the bottom frame 21, and then the back frame 51 is lowered to The groove 53 is put on the rear pipe frame 25. By doing so, the hinge 52 is supported by the rear pipe frame 25 so as to be rotatable around the axis, and the subsequent assembling work is facilitated. Next, the side plate 3 of the intermediate frame 3
By fitting the mounting hole 54 in front of the right hinge 52b (to the right in FIG. 5) to the left pin shaft 313 of the locking pin 310 projecting outward from FIG. Thus, the right hinge 52b is mounted on the intermediate frame 3. In the present embodiment, the front mounting hole 5
4 is fitted to the left pin shaft 313, and the locking projection 55
The bolt B is inserted into each of the mounting hole 54 and the rear mounting hole 54, and is screwed into the mounting hole 31a of the intermediate frame 3 and the screw hole 323 of the locking boss 320 to be fastened. The state of attachment to the frame 3 is assured.

Next, the mounting holes 54 of the left hinge 52a (FIG. 1) and the mounting holes 23 of the left side frame 23 will be described.
By inserting the bolt B through a and fastening with a nut, as shown in FIG. 2, the working seat back 5 is attached to the seat bottom 2. Similarly, the right seat back is attached to the seat bottom 2.

The right hinge 52b is connected to the intermediate frame 3
In this state, the edge of the mounting hole 54 of the right hinge 52b abuts against the locking boss 320 and the flanges 322 and 312 of the locking pin 310.
And the locking pin 310 is in a state where it is prevented from coming off.

[0054]

According to the vehicle seat of the first aspect of the present invention, the intermediate frame is provided with a pair of insertion holes drilled in the width direction before and after the outer fitting groove. A bracket is provided to cover the lower surface of the rear vehicle width direction frame in a state where the outer fitting groove is externally fitted to the rear vehicle width direction frame, and the bracket has a front and rear end corresponding to a pair of insertion holes. A pair of locking projections with perforations are provided, and the brackets are inserted into the respective locking holes and insertion holes with the brackets covering the lower surface of the vehicle width direction frame on the rear side, and the bracket is interposed. Since it is fixed to the frame, the vehicle width direction frame is fastened and clamped by the intermediate frame and the bracket by locking the inserted state of the shaft by predetermined locking means, and the intermediate frame is securely connected to the vehicle width direction frame. Condition Can.

By using such a bracket, the connection state between the intermediate frame and the vehicle width direction frame is stronger than in the conventional connection structure in which the notch is merely fitted into the vehicle width direction frame. Thus, the seat bottom frame can be made structurally strong.

According to the vehicle seat according to the second aspect of the present invention, since each shaft is used for coupling the frame of the seat back to the frame of the seat bottom, coupling means for coupling the seat back is separately used. This eliminates the necessity, and the number of parts can be reduced accordingly.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of an automobile seat according to the present invention.

FIG. 2 is an assembled perspective view of the vehicle seat shown in FIG.

FIG. 3 is a perspective view showing an embodiment of a fastening structure between an intermediate frame and a rear pipe frame, wherein (a) shows a state immediately before the intermediate frame is mounted on the rear pipe frame;
(B) shows a state in which the intermediate frame is mounted on the rear pipe frame, respectively.

FIGS. 4A and 4B are views showing details of an embodiment of a seat belt support structure, wherein FIG. 4A is an exploded perspective view, and FIG.

5A and 5B are explanatory views in a side view showing a coupling structure between the intermediate frame and the rear pipe frame, wherein FIG. 5A shows a state immediately before the reinforcing bracket is mounted on the intermediate frame, and FIG. (C)
Indicates a state where the right hinge is attached to the intermediate frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat 2 Seat bottom 21 Bottom frame 22 Slider 22a Lower rail 22b Upper rail 22c Operation stick 23 Side frame 23a Mounting hole 24 Front pipe frame 25 Rear pipe frame 26 Bottom cushion 3 Intermediate frame 31 Flat plate 31a Mounting hole 310 Locking pin 311 Pin body 312 Flange 313 Left pin shaft 314 Right pin shaft 32 Side plate 320 Locking boss 321 Boss body 322 Flange 323 Screw hole 33 Arc groove 34 Front insertion hole 35 Rear insertion hole 36 Reinforcement bracket 37 Reinforcement plate 38 Locking protrusion 38a front locking hole 38b rear locking hole 4 seat belt support structure 41 auxiliary frame 41a bracket 41b locking claw 410b large locking claw 411b small locking claw 41c nut 42 anchor bar 42a Flat portion 42b Through hole 42c Rear curved portion 42c Rear curved portion 42d Locking convex piece 42e Locking concave portion 43 Base plate 43a U-shaped body 43b Wing 43b 'Notch groove 43c Round hole 43d Large square hole 43e Small square hole 44 Box bracket 44a Bottom plate 44b Side plate 44c Front plate 5 Seat back 51 Back frame 52 Hinge 52a Left bracket 52b Right bracket 53 Arc groove 54 Mounting hole 55 Back cushion 6 Seat belt 61 Connection plate 62 Connection hole 7 Spline shaft 71 Spline shaft main body 72 Head 73 Screwing Part B Bolt

Claims (2)

[Claims] 1. An automobile seat having a seatback frame attached to a rear end portion of a seatbottom frame, wherein the seatbottom frame includes a pair of vehicle width direction frames extending in a vehicle length direction; A pair of vehicle width direction frames extending in the vehicle width direction extending between the front and rear ends of the pair of vehicle length direction frames, and an intermediate frame bridged between intermediate positions of the pair of vehicle length direction frames. The intermediate frame is formed with an outer fitting groove externally fitted to the rear side vehicle width direction frame on the lower surface of the rear end, and is formed in the width direction before and after the outer fitting groove. And a bracket for covering a lower surface portion of the rear vehicle width direction frame in a state where the outer fitting groove is externally fitted to the rear vehicle width direction frame. Is before and after Each end has a pair of locking projections formed with a pair of locking holes corresponding to the pair of insertion holes, and the bracket covers the lower surface of the rear-side vehicle width direction frame. An automobile seat characterized in that a shaft is inserted through a stop hole and an insertion hole. 2. The vehicle seat according to claim 1, wherein the frame of the seat back is coupled to the frame of the seat bottom via the shaft.