JP7376826B2 - vehicle seat - Google Patents

Description

Regarding vehicle seats.

Conventionally, in vehicle seats consisting of a seat cushion and a seat back, a technology has been developed that uses a closed-section structural material that can secure the necessary strength as a frame for the side frame of the seat back frame that constitutes the frame of the seat back. There is.
Patent Document 1 discloses a technique in which a reinforcing member also having a closed cross-section structure is inserted inside a closed-section structural member, and frame members having a closed cross-section structure are overlapped with each other.
Moreover, such technology can also be applied to the side frames of the seat cushion frame that constitutes the skeleton of the seat cushion.

JP2016-215986A

Incidentally, vehicle seats are often manufactured from metal in order to ensure the necessary strength, but metal is difficult to process, so conventional closed-section structural members and reinforcing members are made of metal. That was difficult. Furthermore, since forming a single side frame by overlapping members having a closed cross-section structure increases the weight, a reduction in weight has also been desired.
Further, a seat belt anchor point may be provided on a side frame of the seat cushion frame. Therefore, the side frame is required to have sufficient rigidity to provide the anchor point.

The present invention has been made in view of the above circumstances, and employs a closed cross-section structural material for the side frame of the seat cushion frame, thereby ensuring the rigidity necessary for providing the anchor point of the seat belt, and making it easy to manufacture. It is an object of the present invention to provide a vehicle seat that can be made lighter and lighter.

In order to solve the above problems, the invention according to claim 1 includes a cushion frame that supports a seat back frame serving as a backrest and forms a skeleton of a seat cushion that supports a person's thighs and buttocks. A vehicle seat,
The cushion frame has left and right cushion side frames spaced apart from each other,
At least one of the left and right cushion side frames has a hollow closed cross-sectional structure with an open rear end side,
A plate-shaped bracket that protrudes from the seat back frame side and is fixed to the cushion side frame that has the closed cross-section structure is inserted into the opening of the cushion side frame that has the closed cross-section structure,
The cushion side frame having a closed cross-section structure and the plate-shaped bracket are connected to each other at at least two fixed points in front and rear of the position where the cushion side frame and the plate-shaped bracket overlap. .

The invention according to claim 2 is the vehicle seat according to claim 1 , wherein the cushion frame has a back pipe frame that connects rear end portions of the left and right cushion side frames,
At least the end portion of the back pipe frame on the side of the cushion side frame having the closed cross-section structure among both longitudinal ends thereof passes through the cushion side frame having the closed cross-section structure from side to side. do.

The invention according to claim 3 is the vehicle seat according to claim 2 , in which the cushion side frame having the closed cross-section structure and the plate-shaped bracket are connected to the fixing point in front of the back pipe frame. , the back pipe frame is connected at the fixed location rearward of the back pipe frame .

The invention according to claim 4 is the vehicle seat according to any one of claims 1 to 3, in which a side surface of the cushion side frame having the closed cross-section structure is recessed inward. A feature is that a recess is formed.

The invention according to claim 5 provides the vehicle seat according to claim 4, wherein front and rear lateral slide rails are fixed to each of the front side and the rear side of the cushion frame and slide the cushion frame in the left and right direction. We are equipped with
The recess is provided at a position rearward of a location where the front side slide rail is fixed to the cushion frame .

The invention according to claim 6 is the vehicle seat according to any one of claims 1 to 5, wherein the two front and rear fixing locations are locations fixed with bolts,
The bolt is characterized in that the bolt passes through the cushion side frame having a closed cross-section structure from side to side, and fixes the cushion side frame to the plate-shaped bracket.

The invention according to claim 7 is the vehicle seat according to any one of claims 1 to 6 , wherein the cushion frame includes a back pipe frame that connects the rear end portions of the left and right cushion side frames. has,
Of both lengthwise ends of the back pipe frame, at least the end on the side of the cushion side frame having the closed cross-section structure is closer to the point where the cushion side frame having the closed cross-section structure is fixed to the plate-shaped bracket. is also provided at the bottom .

The invention according to claim 8 provides the vehicle seat according to any one of claims 1 to 7 , comprising: a reclining mechanism for tilting the seat back frame with respect to the cushion frame; and a reclining mechanism for tilting the seat back frame relative to the cushion frame. A seat support part supported on the floor;
The seat back frame has left and right back side frames spaced apart from each other,
The reclining mechanism rotatably connects the plate-shaped bracket fixed to the cushion side frame having a closed cross-section structure and the back side frame,
The fixing location between the cushion side frame having the closed cross-section structure and the plate-shaped bracket is provided at a position that overlaps the reclining mechanism in the vertical direction.

The invention according to claim 9 is the vehicle seat according to claim 8 , wherein the cushion frame has a back pipe frame that connects rear end portions of the left and right cushion side frames,
The back pipe frame is fixed to the cushion side frame having a closed cross-section structure at a position vertically overlapping the reclining mechanism.

The invention according to claim 10 is the vehicle seat according to any one of claims 1 to 9 , wherein the seat frame including the cushion frame and the seat back frame is provided with a cushion pad. and is covered by the epidermis,
The seat frame is installed on the floor of the vehicle body via a pair of left and right front and rear slide rails for sliding movement in the front and rear direction of the vehicle body.

According to the invention described in claim 1 , the plate -shaped bracket is inserted and fixed through the opening of the cushion side frame having a closed cross-section structure, so that, for example, members having a closed cross-section structure can be inserted into each other. It is easier to manufacture and the weight can be reduced compared to the case where they are stacked one on top of the other.

According to the invention as set forth in claim 2, at least the end portion of the back pipe frame on the side of the cushion side frame having a closed cross-section structure out of both ends in the length direction is arranged so that the cushion side frame having a closed cross-section structure is horizontally connected to the cushion side frame having a closed cross-section structure. Since it penetrates, it is possible to improve the attachment strength of the back pipe frame to at least the cushion side frame having a closed cross-section structure, and it is also possible to improve the rigidity of the cushion frame itself.

According to the invention set forth in claim 3, the same effects as the invention set forth in claim 1 can be obtained.

According to the invention set forth in claim 4, the side surface of the cushion side frame having a closed cross-section structure is formed with a concave portion recessed toward the inside, so that the cushion side frame having a closed cross-section structure The cross section can be increased, and the rigidity can be improved.

According to the invention set forth in claim 5, the same effects as the invention set forth in claim 1 can be obtained.

According to the invention set forth in claim 6, the same effects as those of the invention set forth in claim 1 can be obtained.

According to the invention set forth in claim 7, the same effects as the invention set forth in claim 1 can be obtained.

According to the invention set forth in claim 8, the same effects as those of the invention set forth in claim 1 can be obtained.

According to the invention set forth in claim 9, the same effects as the invention set forth in claim 1 can be obtained.

According to the invention set forth in claim 10, the same effects as the invention set forth in claim 1 can be obtained.

FIG. 2 is a front perspective view showing a seat frame that constitutes a vehicle seat. FIG. 2 is a rear perspective view showing a seat frame that constitutes a vehicle seat. FIG. 3 is a perspective view showing the vicinity of the reclining mechanism. FIG. 3 is a perspective view showing the vicinity of the front end of the cushion frame. FIG. 3 is a left side view showing the vicinity of the reclining mechanism. FIG. 3 is a cross-sectional view of the cushion side frame having a closed cross-sectional structure, showing the vicinity of the anchor point when viewed from the front side. FIG. 3 is a perspective view showing the vicinity of the reclining mechanism in the left cushion side frame. It is a perspective view showing an example when left and right cushion side frames are made into a closed section structure. FIG. 3 is a perspective view showing the lower end of the left backside frame and the vicinity of the reclining mechanism. FIG. 3 is a cross-sectional view of the lower end of the left back side frame when viewed from the front side. FIG. 3 is a cross-sectional view of the lower end of the left back side frame when viewed from above. (a) is a front view showing the lower end of the left backside frame and the vicinity of the reclining mechanism, and (b) is a rear view. It is a perspective view showing a second bracket. (a) is a front view showing the second bracket, (b) is a rear view, and (c) is a plan view. FIG. 3 is a rear view showing the vicinity of the peeling prevention structure. FIG. 3 is a left side view showing the vicinity of the peeling prevention structure. FIG. 3 is a rear perspective view showing the vicinity of the peeling prevention structure. FIG. 7 is a rear view showing an example in which the front and rear foot brackets are connected by a plurality of connecting members. FIG. 3 is a right side view showing a seat frame provided with an armrest. FIG. 3 is a right side view showing the seat frame provided with an armrest in a state where the seat back frame is reclined. FIG. 3 is a right side view showing the seat frame with the armrest in a retracted state. It is a perspective view when an armrest provided on the right side is viewed from the left side. FIG. 3 is an exploded perspective view of the armrest. FIG. 7 is a perspective view showing a modification of the seat back frame in which left and right back side frames have a closed cross-sectional structure. It is a perspective view which shows the modification of the seat back frame in which the reinforcement frame was provided. It is a perspective view which shows the modification of the seat back frame in which the plate-shaped back frame and the connection frame were provided. FIG. 7 is a perspective view showing a modification of the cushion frame near the front end.

Embodiments of the present invention will be described below with reference to the drawings. However, although the embodiments described below have various limitations that are technically preferable for implementing the present invention, the technical scope of the present invention is not limited to the embodiments and illustrated examples below. do not have.
In addition, below, the location joined by welding will be explained as a welded part W. In each drawing, the symbol W is attached and explained.

<First embodiment>
In FIGS. 1 and 2, reference numeral 1 indicates a seat frame of a vehicle seat on which a person sits. This seat frame 1 includes a cushion frame 2 that forms the skeleton of a seat cushion that supports the thighs and buttocks of a person, and a seat that forms the skeleton of a seat back whose lower end is supported by the seat cushion and serves as a backrest. A back frame 3, a reclining mechanism 4 for tilting the seat back frame 3 with respect to the cushion frame 2, a seat support section 5 that supports a vehicle seat on the floor, and separation of the cushion frame 2 from the seat support section 5. and a peeling prevention structure 6 that prevents peeling.
Note that the vehicle seat in this embodiment is a seat for a passenger car. However, the seat is not limited to this, and may be a seat in another vehicle such as a bus or a truck, or a seat in a vehicle other than a vehicle such as a train, a ship, or an airplane.

Although not shown, the seat frame 1 is provided with a cushion pad on a cushion frame 2 and a seat back frame 3, and the cushion pad is covered with an outer skin to constitute a vehicle seat.
Further, although not shown, the seat frame 1 is installed on the floor of the vehicle body via a pair of left and right front and rear slide rails for slidingly moving (positioning) the seat frame 1 in the front and rear directions of the vehicle body.

[About the cushion frame]
As shown in FIGS. 1 to 7, the cushion frame 2 connects the left and right cushion side frames 20 and 21 that are spaced apart from each other and the rear end portions of the left and right cushion side frames 20 and 21. It has a back pipe frame 22 and a front pipe frame 23 that connects the front end portions of the left and right cushion side frames 20 and 21.

As shown in FIGS. 5 and 6, one (left side in this embodiment) of the left and right cushion side frames 20, 21 has a closed cross section that combines a left side divided body 20a and a right side divided body 20b. It is integrally formed as a hollow body with a structure (also called monaka structure).

The left divided body 20a is formed to have a U-shaped cross section that is open toward the inside (right side). That is, it consists of a web 200 and flanges 201 and 202 integrally formed on the top and bottom of the web 200.
The tip of the upper flange 201 is bent downward to form a bent portion 201a.
A reinforcing recess 200a is formed in the central portion of the web 200 in the longitudinal direction, which bulges inward and is recessed when viewed from the outer surface (left side). As shown in FIG. 5, this reinforcing recess 200a is arranged near an anchor point 24 (described later) of a seatbelt (not shown).

The right divided body 20b is formed to have a U-shaped cross section that is open toward the outside (left side). That is, it consists of a web 203 and flanges 204 and 205 integrally formed on the top and bottom of the web 203.

The web 200 in the left side divided body 20a and the web 203 in the right side divided body 20b are in a state where they face each other and are separated from each other.
The upper flange 201 of the left side divided body 20a and the upper flange 204 of the right side divided body 20b overlap so that the upper flange 204 of the right side divided body 20b is on the upper side. Since the bent portion 201a is bent downward as described above, it is spaced apart from the upper flange 204 of the right divided body 20b.
The lower flange 202 of the left side divided body 20a and the lower flange 205 of the right side divided body 20b overlap so that the lower flange 205 of the right side divided body 20b is on the upper side.

The upper and lower flanges 201 and 202 of the left-hand divided body 20a and the upper and lower flanges 204 and 205 of the right-hand divided body 20b, which overlap with each other, are joined by welding at a plurality of points (namely, welded portions W).
Note that when joining the upper flange 201 of the left-hand divided body 20a and the upper flange 204 of the right-hand divided body 20b by welding, welding material (base metal) may flow into the gap between the overlapping flanges 201 and 204. This may occur. In such a case, the welding material that has flowed in can be received in the gap between the flange 204 and the bent portion 201a that are spaced apart from each other.

The front end of the left cushion side frame 20 is open toward the front so that a left end 23a of a front pipe frame 23, which will be described later, can be inserted therein.
Further, the rear end portion of the left cushion side frame 20 is opened upward so that a lower portion of a first bracket 41, which will be described later, can be inserted therein.

As shown in FIG. 5, an anchor point 24 (fixing point) for a seatbelt (not shown) is provided at a position near the rear of the center portion of the left cushion side frame 20 in the longitudinal direction. Note that the seat belt is a so-called three-point seat belt, and the anchor point 24 is a location to which the lower end of the seat belt is fixed.
More specifically, the anchor point 24 is a location for fastening a holder (not shown) that holds the lower end of the seat belt. The holder is adapted to be fastened to the anchor point 24 with fasteners such as bolts. Therefore, the anchor point 24 is a through hole that passes through the left cushion side frame 20 in the left-right direction, as shown in FIG. That is, the anchor point 24, which is a through hole, is formed to pass through the left side divided body 20a, the right side divided body 20b, and a first bracket 41, which will be described later. The bolt that fastens the holder is passed through an anchor point 24 that is a through hole, and a nut (not shown) is provided at the tip. This nut may be provided inside the cushion side frame 20 at a location corresponding to the anchor point 24.

The other (right side in this embodiment) of the left and right cushion side frames 20, 21 is formed to have a U-shaped cross section that is open toward the inside (left side). That is, it consists of a web 210 and flanges 211 and 212 integrally formed on the top and bottom of the web 210. In the present embodiment, the right side cushion side frame 21 has a U-shaped cross-sectional structure, but as shown in FIG. , 21A in FIG.
Attach. ). By making the left and right cushion side frames 20, 21A have a closed cross-section structure, the rigidity of the cushion frame 2 can be made higher than when only one side has a closed cross-section structure.
A reinforcing plate 21a having a U-shaped cross section is integrally attached to the rear side of the other cushion side frame 21 by welding or the like along the inner surface of the U-shaped cross section. This makes it possible to ensure a sufficient plate thickness at the rear of the cushion side frame 21, thereby improving the rigidity at the rear of the cushion side frame 21, where a load is easily applied.
Although not shown, the right side cushion side frame 21 is provided with a buckle to which a tongue of a three-point seat belt is attached. As shown in FIG. 3, a nut 25 into which a fixing bolt is screwed is provided at the fixing position of the buckle.

As shown in FIGS. 1 to 3, the back pipe frame 22 connects the rear end portions of the left and right cushion side frames 20, 21.
Both ends of the back pipe frame 22 are provided so as to pass through the left and right cushion side frames 20 and 21, respectively, and are joined by welding (welded portion W).

As shown in FIGS. 1 to 3 and 7, the back pipe frame 22 has left and right sides to which an ISOFIX type child seat (not shown) is attached, which is compatible with ISOFIX, which is an international standard for attaching child seats. Mounted parts (also referred to as lower anchorages) 22a and 22b are provided.

The mounted portion 22a located on the left side is generally formed into a substantially U-shape or a substantially tortoise-shell bracket shape, and its rear surface is curved along the outer peripheral surface of the back pipe frame 22, and its bottom portion is curved. , is fixed by bolts 510 to a movable rail 50b of a horizontal slide rail 50, which will be described later. Further, a substantially U-shaped wire 220 is provided on the upper surface portion located above the back pipe frame 22 so as to protrude toward the front. Additionally, flanges are formed on the bottom and top surfaces to improve rigidity.
As shown in FIGS. 7, 15, etc., the right end and the left and right ends of the upper end of the rear surface of the mounted part 22a are joined to the back pipe frame 22 by welding, and the left end of the rear surface is joined to the back pipe frame 22 by welding. It is joined by welding to the right side surface of the left side cushion side frame 20 (that is, the right side divided body 20b) (welded portion W). In other words, the attached portion 22a connects the left cushion side frame 20, the back pipe frame 22, and the movable rail 50b of the horizontal slide rail 50.
As shown in FIGS. 1 to 3, the mounted portion 22b located on the right side is formed as a bracket consisting of an upper surface portion and left and right flange portions, and a wire 221 is integrally provided to the upper surface portion. ing. This wire 221 is bent into a substantially U-shape and protrudes toward the front. The protruding direction and protruding length thereof are set to be equal to those of the wire 220 in the attached portion 22a located on the left side.
The left and right connectors provided at the rear of the child seat are hooked onto the wires 220, 221 in the left and right attachment parts 22a, 22b.

As shown in FIGS. 1 and 4, the front pipe frame 23 is bent into a substantially U-shape, and its left end 23a is joined to the front end of the left cushion side frame 20. Further, the right end portion 23b is joined to the front end portion of the right side cushion side frame 21.
More specifically, the left end 23a of the front pipe frame 23 is welded to the web 200 of the left divided body 20a of the left cushion side frame 20 and to the upper and lower flanges 201 and 202, respectively. Further, the right end portion 23b of the front pipe frame 23 is welded to the web 210 and the upper and lower flanges 211 and 212 of the right side cushion side frame 21, respectively.
Further, the front pipe frame 23 is bent so as to be inclined upward from the left and right ends 23a, 23b toward the front.

[About the seat back frame]
Next, as shown in FIGS. 1, 9 to 14, etc., the seat back frame 3 includes left and right backside frames 30, 31 which are spaced apart from each other, and the right and left backside frames 30, 31. It has an upper pipe frame 32 (U-shaped back frame) that connects the upper ends, and a lower pipe frame 33 (back frame) that connects the lower ends of the left and right back side frames 30, 31. .

As shown in FIGS. 9 to 11, one of the left and right back side frames 30, 31 (the left side in this embodiment) has a closed cross section that combines a left side divided body 30a and a right side divided body 30b. It is integrally formed as a hollow body with a structure (also called monaka structure).

The left side divided body 30a is formed to have a U-shaped cross section that is open toward the inside (right side). That is, it consists of a web 300 and flanges 301 and 302 integrally formed at the front and rear of the web 300.
The tip of the front flange 301 is a bent portion 301a bent toward the rear.

The web 300 has a recess 300a and bulges 300b and 300c, as shown in FIGS. 1, 9, and 11.
The recessed portion 300a is formed to bulge inward from the lower end of the web 300 to near the upper end, and to be recessed when viewed from the outer side (left side).
As the recess 300a is formed, bulges 300b and 300c are formed on the front and rear edges of the web 300, bulging outward (to the left) with respect to the recess 300a. ing.
Note that the front bulge 300b is integrally formed with the front flange 301, and the rear bulge 300c is integrally formed with the rear flange 302.

The right side divided body 30b is formed to have a U-shaped cross section that is open toward the outside (left side). That is, it consists of a web 303 and flanges 304 and 305 integrally formed at the front and rear of the web 303.
The web 303 has a recess 303a and bulges 303b and 303c, as shown in FIGS. 1, 9, and 11.
The recessed portion 303a is formed to bulge inward from near the lower end of the web 303 to near the upper end, and to be recessed when viewed from the outer side (right side).
As the recess 303a is formed, bulges 303b and 303c are formed on the front and rear edges of the web 303, which bulge outward (to the right) with respect to the recess 303a. has been done.
Note that the front bulge 303b is integrally formed with the front flange 304, and the rear bulge 303c is integrally formed with the rear flange 305.

The web 300 in the left side divided body 30a and the web 303 in the right side divided body 30b are in a state where they face each other and are separated from each other.
The front flange 301 of the left side divided body 30a and the front flange 304 of the right side divided body 30b overlap so that the front flange 304 of the right side divided body 30b is on the front side. Since the bent portion 301a is bent toward the rear as described above, it is spaced apart from the front flange 304 of the right divided body 30b. The bent portion 301a is bent along the surface of a front flange 42a of a second bracket 42, which will be described later (see FIG. 11).
The rear flange 302 of the left divided body 30a and the rear flange 305 of the right divided body 30b overlap so that the rear flange 305 of the right divided body 30b is on the rear side.

The front and rear flanges 301 and 302 of the left side divided body 30a and the front and rear flanges 304 and 305 of the right side divided body 30b, which overlap with each other, are joined by welding at a plurality of points (welded portion W).
In addition, when joining the front flange 301 of the left side divided body 30a and the front side flange 304 of the right side divided body 30b by welding, welding material (base metal) may flow into the gap between the overlapping flanges 301, 304. This may occur. In such a case, the welding material that has flowed in can be received in the gap between the flange 304 and the bent portion 301a that are spaced apart from each other.

The lower end of the left back side frame 30 opens downward so that the upper part of a second bracket 42, which will be described later, can be inserted therein.
Note that the left backside frame 30 is formed so as to gradually become thicker toward the bottom when viewed from the side. Therefore, the above-mentioned opening at the lower end is formed wider than the internal hollow part, so that the upper part of the second bracket 42 can be easily inserted.

The other (in this embodiment, the right side) backside frame 31 of the left and right backside frames 30, 31 is formed to have a U-shaped cross section that is open toward the inside (left side). That is, it consists of a web 310 and flanges 311 and 312 integrally formed at the front and rear of the web 310.
Further, the backside frame 31 on the right side is formed shorter than the backside frame 30 on the left side. Furthermore, the lower end of the right backside frame 31 and the lower end of the left backside frame 30 are arranged at the same height position. That is, the upper end of the backside frame 30 on the left side protrudes higher than the upper end of the backside frame 31 on the right side. Note that a guide bracket 34 used for guiding a seat belt (not shown) is provided at the upper end of the left back side frame 30. That is, the guide bracket 34 is located on the upper end side of the three-point seat belt.
The upper end of the right backside frame 31 is narrower than the center and lower ends, so that an intermediate pipe 32b of an upper pipe frame 32, which will be described later, can be inserted therein.
Note that the guide bracket 34 is used as a set with a front side portion 34a that covers the front surface of the upper end of the left back side frame 30.

As shown in FIGS. 1 and 2, the upper pipe frame 32 connects the upper ends of the left and right backside frames 30 and 31.
The upper pipe frame 32 is bent into a substantially U-shape and includes an upper pipe 32a extending in the left-right direction, an intermediate pipe 32b extending in the up-down direction, and a lower pipe 32c extending in the left-right direction. Note that there are bent portions between the upper pipe 32a and the intermediate pipe 32b, and between the intermediate pipe 32b and the lower pipe 32c.
Although not shown, square pipes 32d, 32d to which pillar holding parts for holding pillars of the headrest are attached are joined to the upper pipe 32a.
The left end portions of the upper pipe 32a and the lower pipe 32c are joined to the left backside frame 30 by welding (welded portion W). Further, the left end portions of the upper pipe 32a and the lower pipe 32c are provided so as to pass through the web 300 of the left divided body 30a that constitutes the left backside frame 31. The left end portion of the upper pipe 32a passing through the web 300 is covered by one piece of the guide bracket 34. Further, the left end portion of the lower pipe 32c that penetrates the web 300 does not protrude outward (to the left) beyond the bulges 300b and 300c formed at the front and rear of the web 300.
The intermediate pipe 32b is provided inside the web 310 and the front and rear flanges 311, 312 at the upper end of the right back side frame 31, and is sandwiched between the web 310 and the front and rear flanges. 311 and 312 by welding (welded part W).

The lower pipe frame 33 is a single pipe frame extending laterally, and connects the lower end portions (slightly above the lower end portions) of the left and right back side frames 30, 31. Both longitudinal ends of this lower pipe frame 33 are provided so as to pass through the left and right back side frames 30 and 31, respectively, and are joined by welding (welded portion W).
The left end of the lower pipe frame 33 passes through the web 300 of the left divided body 30a that constitutes the left backside frame 30, but is located outside of the bulges 300b and 300c formed at the front and rear of the web 300. It is in a state where it does not protrude to the left side. That is, the left end of the lower pipe frame 33 passes through the recess 300a in the web 300 of the left divided body 30a.

[About the reclining mechanism]
Next, as shown in FIGS. 1 to 14, the reclining mechanism 4 includes a substantially disc-shaped round recliner 40 with a rotation stopper function, and a first recliner for the left side of the seat connected via the round recliner 40. It has a bracket 41, a second bracket 42, and a third bracket 43 for the right side of the seat.

The round recliner 40 is provided on both left and right sides of the seat frame 1, and on the left side of the seat, the round recliner 40 rotatably connects a second bracket 42 to a first bracket 41. On the right side of the seat, the backside frame 31 on the right side is rotatably connected to the third bracket 43.
The reclining mechanism 4 is provided with a rotation shaft 4a that passes through the center of the round recliner 40 and serves as the rotation center of the seat back frame 3. Further, the rotating shaft 4a is provided so as to pass through the first bracket 41 and the second bracket 42.

The first bracket 41 is formed into a plate shape with a main body plate, and as shown in FIGS. 3 and 5, the round recliner 40 is provided on the upper part, and the lower part is attached to the left side cushion side frame 20. It is in a fixed state. The round recliner 40 is welded to the inner surface (right side) of the upper portion of the first bracket 41 (welded portion W).
Flanges 41a and 41b are integrally formed on the front edge and the rear edge of the first bracket 41, respectively, in order to improve the rigidity of the first bracket 41.
Further, the vertically intermediate portion 41c of the main body plate portion of the first bracket 41 is formed in a step shape such that the upper portion of the first bracket 41 is located outside with respect to the lower portion.

The lower part of the first bracket 41 is provided so as to be inserted into the cushion side frame 20 having a closed cross-sectional structure from a position opened upward on the rear end side. The lower part of the first bracket 41 is fixed from the outer surface of the cushion side frame 20 by bolts 410 and 411 at two locations, front and rear.
The bolts 410 and 411 pass through the cushion side frame 20 from side to side, and nuts 412 and 413 are tightened on the inner surface of the cushion side frame 20, as shown in FIG.
Note that the bolts 410 and 411 are located at one location in front of the back pipe frame 22 and one location behind the back pipe frame 22.

As shown in FIG. 5, a protruding piece 41d protruding obliquely forward and downward is integrally formed in the lower part of the first bracket 41 further below the fixing locations by the bolts 410, 411. The protruding piece 41d is where the anchor point 24, which is the above-mentioned through hole, is formed. In other words, a through hole that becomes the anchor point 24 is formed in the protruding piece 41d.

The second bracket 42 is formed into a plate shape with a main body plate part, and as shown in FIGS. It is in a fixed state. Note that the round recliner 40 is joined to the lower outer surface (left side surface) of the second bracket 42 by welding.
Flanges 42a and 42b are integrally formed on the front edge and the rear edge of the second bracket 42, respectively, in order to improve the rigidity of the second bracket 42.
Furthermore, a bent plate portion 42c bent into a crank shape is integrally formed at the upper end of the main body plate portion of the second bracket 42.
The bent plate part 42c includes a first piece 420 that is integrally formed on the upper edge of the main body plate and projects upward, and a direction away from the main body plate from the upper end of the first piece 420 (in the present embodiment, on the left side). The third piece 422 is provided with a second piece 421 that projects upward, and a third piece 422 that projects upward from the tip of the second piece 421 in the projecting direction.

The upper part of the second bracket 42 including the bent plate part 42c is inserted into the lower end of the backside frame 30 having a closed cross-section structure from a downwardly opened part.
The main body plate portion of the second bracket 42 is in contact with the web 303 of the right side divided body 30b of the back side frame 30, and is joined by welding. Further, the third piece 422 of the bending plate portion 42c is in contact with the web 300 of the left side divided body 30a of the backside frame 30, and is joined by welding (welded portion W).
Welding holes 300d and 303d passing through the webs 300 and 303 are formed at the locations where the second bracket 42 comes into contact with the web 300 of the left-hand side divided body 30a and the web 303 of the right-side divided body 30b. The main body plate portion of the second bracket 42 and the third piece 422 are welded and fixed using the holes 300d and 303d. In other words, the edges of the holes 300d and 303d, the main body plate of the second bracket 42, and the third piece 422 are welded together. Thereby, the main body plate portion of the second bracket 42 and the third piece 422 can be welded from the outer side of the backside frame 30, which has a closed cross-section structure.
In addition, in this embodiment, the third piece 422 is in contact with the web 300 of the left side divided body 30a and is joined by welding, but it may be in a state where it is only in contact without being joined. .
Further, the main body plate portion of the second bracket 42 is welded to the right-side divided body 30b not only at the position of the hole 303d but also at a plurality of positions below the hole 303d.

To explain in more detail, the second bracket 42 has a main body plate portion fixed in contact with the web 303 of the right side divided body 30b, and a third piece 422 of the bent plate portion 42c above the main body plate portion is fixed to the left side divided body 30a. is fixed in contact with the web 300 of. In other words, the second bracket 42 is fixed to the backside frame 30 at two diagonally spaced locations inside the left backside frame 30 into which it is inserted. More specifically, one fixed location (the location where the third piece 422 is fixed in the bending plate portion 42c: the position of the hole 300d) is located above and on the outside, and the other fixed location (The location where the main body plate portion is fixed: the position of the hole 303d and other welded locations) is located below and inside.
Since the second bracket 42 is fixed inside the backside frame 30 at two locations diagonally spaced apart in the upper and lower directions, it has a reinforcing effect against the load applied to the three-point seat belt that is hung on the sash. demonstrate.

The third bracket 43 is formed into a plate shape with a main body plate portion, and as shown in FIGS. 1 and 3, the round recliner 40 is provided at the upper part, and the lower part is connected to the cushion side frame 21 on the right side. It is fixed to the outside surface. Note that the round recliner 40 is joined to the inner surface (left side) of the upper part of the third bracket 43 by welding. Further, the round recliner 40 is joined to the outer surface (right side) at the lower end of the right backside frame 31 by welding.
Flanges 43a and 43b are integrally formed on the front edge, lower edge, and rear edge of the third bracket 43 to improve the rigidity of the third bracket 43. (See Figure 19, etc.).
Further, the lower end portion of the third bracket 43 is fixed to the right side cushion side frame 21 by bolts 430 and 431 at two locations, front and rear.
The bolts 430, 431 pass through the third bracket 43 and the cushion side frame 21 from side to side, and nuts 432, 433 are tightened on the inner surface of the cushion side frame 21, as shown in FIG.
Note that the bolts 430 and 431 are located at one location in front of the back pipe frame 22 and one location behind the back pipe frame 22. That is, the positional relationship is exactly opposite to that of the above-mentioned bolts 410 and 411 provided on the left side.

[About the seat support section]
Next, as shown in FIGS. 1 to 4, FIG. 7, FIG. 15, and FIG. foot brackets 52 and 53 provided at the left and right ends of the horizontal slide rail 50, foot brackets 54 and 55 provided at the left and right ends of the rear horizontal slide rail 51, and front and rear foot brackets provided on the left side. and a connecting member 56 that connects the foot brackets 52 and 54 of the foot brackets 52 and 54 together.
Note that the lower ends of each of the foot brackets 52 to 55 are attached to the movable rails of the pair of left and right front and rear slide rails described above. That is, the seat support portion 5 in this embodiment is capable of supporting a vehicle seat on the floor via the front and rear slide rails.

The lateral slide rails 50 and 51 are for sliding the seat frame 1 in the left-right direction, and are elongated in the left-right direction.
As shown in FIGS. 4 and 16, the horizontal slide rails 50 and 51 include fixed rails 50a and 51a, and movable rails 50b and 51b that are slidably provided in the length direction with respect to the fixed rails 50a and 51a. This makes it possible to adjust the position of the seat frame 1 in the left-right direction.

The fixed rail 50a of the horizontal slide rail 50 provided on the front side is provided to span between the upper end portions of the foot brackets 52 and 53 located on the front side.
The movable rail 50b of the horizontal slide rail 50 provided on the front side is provided in the vicinity of the left and right side ends 23a, 23b of the front pipe frame 23 of the cushion frame 2, spanning the lower surfaces of the left and right cushion side frames 20, 21. It is being
More specifically, as shown in FIG. 4, the inner surface of the front end of the left side cushion side frame 20 (i.e., the right side divided body 20b) has a groove that protrudes inwardly along the extending direction of the horizontal slide rail 50. A connecting member 206 is integrally provided by welding or the like, and the movable rail 50b is fixed to this connecting member 206. That is, the left end portion of the movable rail 50b is provided on the lower surface of the left cushion side frame 20 via the connecting member 206.
Further, the right end of the movable rail 50b is fixed to a lower flange 212 at the front end of the right cushion side frame 21.
Note that the movable rail 50b is fixed to the horizontal slide rail 50 using bolts 500, 501 and nuts 502, 503.

Although not shown, the bolt 500 connecting the movable rail 50b and the connecting member 206 is located forward of the end of the left end 23a of the front pipe frame 23 in the cushion frame 2.
Further, as shown in FIG. 4, the bolt 501 connecting the movable rail 50b and the lower flange 212 at the front end of the right cushion side frame 21 is connected to the end of the right end 23b of the front pipe frame 23 in the cushion frame 2. It is located in front of the front part.
In other words, the left and right ends 23a and 23b of the front pipe frame 23 extend rearward from the point where the movable rail 50b is fixed to the cushion side frames 20 and 21.

A fixed rail 51a of the horizontal slide rail 51 provided on the rear side is provided to span between the upper end portions of the foot brackets 54 and 55 located on the rear side.
The movable rail 51b of the horizontal slide rail 51 provided on the rear side is provided in the vicinity of the left and right end portions of the back pipe frame 22 of the cushion frame 2, spanning the lower surfaces of the left and right cushion side frames 20, 21. ing.
More specifically, the above-mentioned mounted portion 22a is integrally provided on the inner surface of the rear end portion of the left side cushion side frame 20 (that is, the right side divided body 20b), and the movable rail 51b It is fixed to the bottom of the mounted portion 22a with bolts 510 and nuts 512. That is, since the mounted portion 22a is welded to the left cushion side frame 20 and the back pipe frame 22 as described above, the left end of the movable rail 51b is also welded to the left side via the mounted portion 22a. The cushion side frame 20 and the back pipe frame 22 are connected to each other.
Further, the right end portion of the movable rail 51b is fixed to a lower flange 212 at the rear end portion of the right cushion side frame 21. The right end of the movable rail 51b is fixed by bolts 511 and nuts 513.

Each of the foot brackets 52 to 55 is formed into a substantially box shape with plate portions facing each other in the front and rear, plate portions facing left and right, and a plate portion forming the upper surface. Each plate part is joined by welding. The shape of each of the foot brackets 52 to 55 may be changed as appropriate depending on the front and rear slide rails (not shown) and the floor of the vehicle body.
The fixed rails 50a, 51a of the lateral slide rails 50, 51 are bolted or welded to the plate portions forming the upper surface of each of the foot brackets 52-55.

The connecting member 56 is a pipe frame that connects the front and rear foot brackets 52 and 54 provided on the left side. The connecting member 56 is provided so as to pass through the front and rear plate portions of the foot bracket 52 located on the front side and the front and rear plate portions of the foot bracket 54 located on the rear side. That is, the front end of the connecting member 56 protrudes forward from the front plate of the foot bracket 52 located on the front side, and the rear end protrudes rearward from the rear plate of the foot bracket 54 located on the rear side. ing. The connecting member 56 is welded to each plate portion of the front and rear foot brackets 52 and 54 (welded portion W).
This not only increases the integrity of the left side portion of the seat support portion 5, but also enhances the reinforcing effect over a wide range of the cushion frame 2 fixed to the seat support portion 5, including the left side portion.

[About anti-peeling structure]
Next, the peeling prevention structure 6 prevents the cushion frame 2 from peeling off from the seat support part 5, and is provided on the rear left side of the seat frame 1, as shown in FIGS. 2 and 15 to 17. There is.
Such peeling prevention structure 6 includes the back pipe frame 22 in the cushion frame 2, the left front foot bracket 52 and the left rear foot bracket 54 in the seat support part 5, and the foot brackets 52 arranged front and rear on the left side of the seat. , 54, an upper peel prevention part 60 fixed to the rear surface of the back pipe frame 22, and a lower peel prevention part 60 fixed to the rear surface of the foot bracket 54 and engaged with the upper peel prevention part 60. 61. In this embodiment, there is only one connecting member 56 that connects the front foot bracket 52 and the rear foot bracket 54, but as shown in FIG. 18, a plurality of connecting members 56 connect the front and rear foot brackets. The brackets 52 and 54 may be connected. Thereby, the fixed state of the lower peeling prevention part 61 becomes stronger, and the effect of preventing peeling of the lateral slide rails 50 and 51 by the peeling prevention structure 6 can be enhanced. When a plurality of connecting members 56 are provided, the sizes of the front and rear foot brackets 52 and 54 shall be appropriately changed to a size sufficient to attach the plurality of connecting members 56 (for convenience of explanation, the size is not shown in FIG. 18). The wide rear foot bracket 54A is designated by the reference numeral 54A, and the front foot bracket 52, which is not shown in FIG. 18, is set to have approximately the same size as the rear foot bracket 54A. ).
Note that the back pipe frame 22, foot bracket 52, foot bracket 54, and connecting member 56 are configured as described above.

As shown in FIGS. 15 and 17, the upper peeling prevention part 60 is arranged behind the left-hand mounted part 22a to which a child seat (not shown) is mounted. In addition, not only the upper peel prevention part 60 but also the peel prevention structure 6 itself is arranged behind the left side attached part 22a, and when the peel prevention structure 6 is viewed straight from behind, the peel prevention structure 6 and the left side mounted portion 22a are arranged at approximately the same position in the left-right direction of the seat frame 1.
The upper peeling prevention part 60 has a fixing part 600 that is located at the upper end of the upper peeling prevention part 60 and is fixed to the rear surface of the back pipe frame 22, and a main body that is integrally provided below the fixing part 600. portion 601, and an upper engaging portion 602 integrally provided at the lower end portion of the main body portion 601.

The fixing part 600 includes a central recess 600a formed so that the center part in the left and right direction is recessed toward the back pipe frame 22 side, and left and right flanges formed at the left and right side edges so as to protrude toward the back pipe frame 22 side. 600b and 600c.
The fixing portion 600 is welded to the back pipe frame 22 at the position where the central recess 600a is formed and the left and right flanges 600b, 600c (welded portion W). The welding positions of the left and right flanges 600b and 600c with respect to the back pipe frame 22 are approximately the same position in the left-right direction of the seat frame 1 as the welding positions of the left and right ends at the rear upper end of the attached portion 22a with respect to the back pipe frame 22. It is a relationship.

The main body portion 601 is formed wider than the fixed portion 600 in the left and right directions. Furthermore, a plurality of beads 601a are formed in line on the rear surface of the main body 601 to improve the rigidity of the main body 601. These plural beads 601a are formed longer in the vertical direction than in the horizontal direction.
Left and right flanges (flange shapes) 601b and 601c are formed on the left and right side edges of the main body part 601 on the fixed part 600 side so as to protrude toward the back pipe frame 22 side. It is installed in one piece. The left and right flanges 601b and 601c of the main body portion 601 and the left and right flanges 600b and 600c of the fixing portion 600 are integrally formed.

As shown in FIGS. 16 and 17, the upper engaging portion 602 is curved from the lower end of the main body portion 601 toward the rear horizontal slide rail 51 so as to have a hook-shaped cross section. In other words, the upper engaging portion 602 is formed into a substantially J-shape when viewed in cross section.

As shown in FIGS. 15 to 17, the lower peeling prevention part 61 includes a fixing part 610 fixed to the rear surface of the foot bracket 54 with a bolt 611, and a lower engagement part integrally provided at the upper end of the fixing part 610. A joining part 612 is provided.

The fixing part 610 is fixed by bolts 611 to the rear plate part (described above) that constitutes the foot bracket 54 arranged on the rear left side of the seat. Note that the lower edge of the fixing portion 610 is curved to avoid the connecting member 56 protruding rearward, and the bolts 611 are fixed at both left and right sides of the connecting member 56.

As shown in FIG. 16, the lower engaging portion 612 is curved from the upper end of the fixing portion 610 toward the upper engaging portion 602 of the upper peel prevention portion 60 so as to have a hook-shaped cross section. In other words, the lower engaging portion 612 is formed into a substantially inverted J shape when viewed in cross section.

As shown in FIG. 16, the upper engaging part 602 in the upper peel preventing part 60 and the lower engaging part 612 in the lower peel preventing part 61 are in a positional relationship such that they engage with each other. The foot bracket 54 provided with the lower peeling prevention part 61 is connected to the front foot bracket 52 by a connecting member 56. Therefore, for example, when the vehicle collides with something and a large load is applied, the cushion frame 2 is effectively prevented from being separated from the seat support portion 5.

In addition, since the upper engaging portion 602 and the lower engaging portion 612 have no flanges or walls at their left and right ends, the upper engaging portion 602 and the lower engaging portion 612 do not engage with each other. Even in the state where they are in contact with each other, the sliding movement of the seat frame 1 by the lateral slide rails 50, 51 is not hindered.
Furthermore, the length in the left-right direction where the upper engaging portion 602 and the lower engaging portion 612 engage with each other is set to be wider than the length of sliding movement by the horizontal slide rails 50 and 51.

[Effects of this embodiment]
According to the present embodiment as described above, the plate-shaped first bracket 41 is inserted into the opening of the cushion side frame 20 which has a closed cross-section structure, and the cushion side frame 20 which has a closed cross-section structure is connected to the plate-shaped first bracket 41. Since the anchor point 24 of the seat belt is arranged at a position where it overlaps with the first bracket 41, the anchor point 24 of the seat belt can be attached to both the cushion side frame 20, which has a closed cross-section structure, and the first bracket 41. The rigidity required for providing the anchor point 24 of the seat belt can be secured.
Further, since the plate-shaped first bracket 41 is inserted and fixed through the opening of the cushion side frame 20 having a closed cross-section structure, for example, when members having a closed cross-section structure are inserted and overlapped, It is easier to manufacture and can be lighter than the previous model.

In addition, the cushion side frame 20 and the first bracket 41, which have a closed cross-section structure, are connected by bolts 410 and 411 at two locations before and after the position where the cushion side frame 20 and the first bracket 41 overlap. The connection strength between the cushion side frame 20 and the first bracket 41, which have a closed cross-section structure, can be improved, and the rigidity of the cushion frame 2 itself can also be improved.

In addition, the front and rear flanges 41a and 41b of the first bracket 41 are in contact with the front and rear inner surfaces of the cushion side frame 20, which has a closed cross-section structure. The load applied to the cushion frame 2 can be distributed between 41a, 41b and the front and rear inner surfaces.

Further, since the side surface of the cushion side frame 20 having a closed cross-section structure is formed with a concave portion 200a that is recessed toward the inside, it is possible to increase the cross section of the cushion side frame 20 having a closed cross-section structure. can be used to improve rigidity.

Furthermore, since the recess 200a is formed near the anchor point 24, the rigidity of the cushion side frame 20 near the anchor point 24 can be improved.

Furthermore, among both lengthwise ends of the back pipe frame 22, at least the end on the side of the cushion side frame 20 having a closed cross-section structure passes through the cushion side frame 20 having a closed cross-section structure from side to side. At least the attachment strength of the back pipe frame 22 to the cushion side frame 20 having a closed cross-section structure can be improved, and the rigidity of the cushion frame 2 itself can also be improved.

Furthermore, since the mounted portion 22a to which the child seat is attached is welded to both the back pipe frame 22 and the cushion side frame 20 having a closed cross-section structure, the attachment strength of the mounted portion 22a to the back pipe frame 22 is reduced. In addition, the rigidity of the portion where the back pipe frame 22 and the cushion side frame 20 having a closed cross-section structure are connected can be improved.

Further, the left and right side ends 23a and 23b of the front pipe frame 23 are welded to the webs 200 and 210 of the front ends of the left and right cushion side frames 20 and 21 and the upper and lower flanges 201, 211, 202 and 212, respectively. Therefore, the left and right side ends 23a and 23b of the front pipe frame 23 can be held in a sandwiched manner.

In addition, the left and right side ends 23a and 23b of the front pipe frame 23 extend rearward from the fixing points (bolts 500 and 501) on the front side slide rail 50 relative to the cushion frame 2, so that the left and right side ends 23a and 23b are The fixed points on the front side slide rail 50 are places with increased rigidity, and the left and right side ends 23a, 23b of the front pipe frame 23 appear to be inserted deeper than the places with increased rigidity. It becomes a state. This makes it easier to disperse the load applied to the front pipe frame 23, making it easier for the front pipe frame 23 to support the load.

In addition, the portions where the left and right side ends 23a, 23b of the front pipe frame 23 overlap with the front ends of the left and right cushion side frames 20, 21 are fixed points on the front side slide rail 50 (points of bolts 500, 501). ), the left and right side ends 23a and 23b of the front pipe frame 23 can be held over a wide range by the front ends of the left and right cushion side frames 20 and 21.

Moreover, since at least one of the left and right backside frames 30, 31 has a closed cross-sectional structure, necessary rigidity can be ensured in at least one of the left and right backside frames 30, 31.
Further, a plate-shaped second bracket 42 having a main body plate portion and a bent plate portion 42c bent in a direction away from the main body plate portion and protruding upward from the cushion frame 2 side has a closed cross-section structure. Since it is inserted through the opening of the backside frame 30 and joined to the backside frame 30, it is easier to manufacture than when, for example, members having a closed cross-section structure are inserted and overlapped. Weight reduction can be achieved.
Furthermore, since the bent plate portion 42c is in contact with the inner surface of the back side frame 30 having a closed cross-section structure, the load applied to the seat back frame 3 can be dispersed at the position where the bent plate portion 42c is in contact. .

Further, the main body plate portion of the second bracket 42 is in contact with the inner surface of the backside frame 30 having a closed cross-section structure, and the bent plate portion 42c, which is bent in a direction away from the main body plate portion, is Since the second bracket 42 is integrally formed at the upper end of the backside frame 30, which has a closed cross-section structure, the second bracket 42 is attached to each of the inner surface located inside the seat and the inner surface located outside the seat. However, the contact point is offset in the vertical direction. As a result, the load on the seat back frame 3 is lower than when the seat back frame 3 is in contact with only one of the inner surfaces of the back side frame 30 having a closed cross-section structure, the inner surface located inside the seat and the inner surface located outside the seat. Load can be effectively distributed.
Furthermore, for example, when the guide bracket 34 used for guiding the seat belt is attached to the upper end of the back side frame 30 having a closed cross-section structure, it is assumed that a load will be applied in an oblique direction when the seat belt is used. However, the load applied in such a diagonal direction is also easily dispersed.

In addition, holes 300d and 303d are formed in the backside frame 30 having a closed cross-section structure at locations where the second bracket 42 contacts, and the backside frame 30 having a closed cross-section structure is formed using the holes 300d and 303d. Since the and second bracket 42 are welded together, it is easy to weld the second bracket 42 from the outer surface of the backside frame 30, which has a closed cross-section structure.

Further, the second bracket 42 has flanges 42a and 42b integrally formed on the front edge and rear edge of the main body plate, respectively, and the front and rear flanges 42a and 42b have a closed cross-section structure. The seat back frame 3 is in contact with the front and rear inner surfaces of the back side frame 30, so that the seat back frame 3 It is possible to distribute the load applied to the

Further, since the front and rear flanges 42a, 42b and the backside frame 30 having a closed cross-section structure are welded, the attachment state of the backside frame 30 to the second bracket 42 can be strengthened, and the backside frame 30 can be firmly attached to the second bracket 42. It becomes easier to support the frame 30.

Furthermore, since a recess 300a recessed toward the inner side of the seat is formed at least on the outer surface of the backside frame 30 having a closed cross-section structure, the backside frame 30 has a closed cross-section structure. The cross section of 30 can be increased, and the rigidity can be improved.

In addition, since both longitudinal ends of the lower pipe frame 33 that spans between the left and right back side frames 30 and 31 pass through each of the left and right back side frames 30 and 31 in the left and right directions, the left and right back side The attachment strength of the lower pipe frame 33 to the frames 30, 31 can be improved, and the rigidity of the seatback frame 3 itself can also be improved.

Furthermore, at least the end portion of the lower pipe frame 33 on the side of the backside frame 30 which has a closed cross-section structure in the longitudinal direction passes through the recess 300a and does not protrude outward beyond the recess 300a. Therefore, when a cushion pad is provided on the seat back frame 3 and the backside frame 30 having a closed cross-section structure is covered with the cushion pad, the cushion pad and the end of the lower pipe frame 33 are less likely to interfere.

Further, the seat back frame 3 has an upper pipe frame 32 which is bridged between the left and right back side frames 30 and 31 and is formed in a U-shape with both ends extending laterally. If three frames are used, boundaries (cuts: edges) will occur between the frames, but if the U-shaped upper pipe frame 32 is used, such boundaries can be eliminated. Thereby, for example, when an object collides with the seat back, it is possible to prevent the object from hitting the boundary between the frames, thereby improving safety. Further, the U-shaped upper pipe frame 32 can more easily disperse the load than, for example, using three straight frames.
Furthermore, the U-shaped upper pipe frame 32 can reduce the number of parts rather than using three straight frames.

In addition, both ends of the U-shaped upper pipe frame 32 pass through the backside frame 30, which has a closed cross-section structure, from side to side, so that the U-shaped upper pipe frame 32 has a closed cross-section structure. The strength of attachment to the backside frame 30 can be improved, and the rigidity of the seatback frame 3 itself can also be improved.

Further, since the foot bracket 54 to which the lower peeling prevention part 61 is fixed is connected to the foot bracket 52 on the front side thereof by the connecting member 56, for example, if the front and rear foot brackets 52 and 54 are not connected by the connecting member 56, Compared to this, the fixed state of the lower peel prevention part 61 becomes stronger. On top of that, an upper peel prevention part 60 fixed to the cushion frame 2 side and a lower peel prevention part 61 fixed to the rear foot bracket 54 of the front and rear foot brackets 52 and 54 connected by the connecting member 56. The fixed rails 50a, 51a and the movable rails 50b, 51b of the horizontal slide rails 50, 51 engage with each other in a state where the cushion frame 2 can be slid by the front and rear horizontal slide rails 50, 51. This makes it easier to prevent peeling.

Furthermore, since the lower peeling prevention part 61 is fixed at a position (the position of the bolt 611) where the connecting member 56 is sandwiched in the rear foot bracket 54, it is connected to the fixed location of the lower peeling prevention part 61. The member 56 can be brought closer to the member 56, and the fixed state of the lower peel prevention part 61 can be easily made strong.

Further, since the upper peeling prevention part 60 is fixed to the back pipe frame 22 provided at the rear end of the cushion frame 2, the upper peeling prevention part 60 is fixed to the back pipe frame 22 provided at the rear end of the cushion frame 2. , it is easy to strengthen the fixing strength of the upper peel prevention part 60.

Further, the fixing part 600 in the upper peeling prevention part 60 has a central recess 600a recessed toward the back pipe frame 22 at the center in the left-right direction of the fixing part 600. The cross section can be increased, and the rigidity can be improved.

In addition, the upper peel prevention part 60 is welded to the back pipe frame 22 at the center recess 600a of the fixing part 600 and at both left and right ends (flanges 600b, 600c) of the fixing part 600, so that it can be welded to the back pipe frame 22 at multiple positions. This means that the fixing strength to the back pipe frame 22 can be improved.

Moreover, since the upper peeling prevention part 60 is provided with flange shapes 601b and 601c below the positions of both left and right ends of the fixing part 600 welded to the back pipe frame 22, the rigidity of the part below the fixing part 600 is increased. can be improved. This makes it difficult for the upper peel prevention part 60 to deform, so that the engagement between the upper peel prevention part 60 and the lower peel prevention part 61 becomes difficult to disengage.
Further, for example, when the seat belt is pulled and the upper peel prevention part 60 tries to deform diagonally forward, the flange shapes 601b and 601c are brought into contact with the lower peel prevention part 61 and its surroundings, causing the displacement. The amount can be controlled.

Further, the upper peeling preventing portion 60 is disposed at the rear of the attached portion 22a to which the child seat is attached and at approximately the same position in the left and right direction, so the upper peeling preventing portion 60 and the upper peeling preventing portion 60 are disposed on the back pipe frame 22. The rigidity of the vicinity where the mounting portion 22a is provided can be improved. Thereby, the attachment state of the child seat attached to the attached portion 22a can be improved.

Further, the welding location of the attached part 22a to the back pipe frame 22 and the welding location at the positions of both left and right ends (flanges 600b, 600c) of the fixing part 600 of the upper peel prevention part 60 are approximately equal in the left and right direction. Since it is arranged in the position, it is possible to improve the rigidity of the vicinity where the upper peel prevention part 60 and the attached part 22a are welded in the back pipe frame 22, and the fixing strength of the upper peel prevention part 60 can be improved.

Further, the portion of the upper peel prevention portion 60 that engages with the lower peel prevention portion 61 is formed longer and wider in the left-right direction than the fixed portion 600, so that the cushion frame 2 is Even when the upper peeling prevention part 60 and the lower peeling prevention part 61 are slid from side to side, the engagement between the upper peeling prevention part 60 and the lower peeling prevention part 61 becomes difficult to disengage.

Moreover, since the upper peel prevention part 60 includes a bead 601a formed on the surface of the upper peel prevention part 60 so as to extend in the vertical direction, the rigidity of the upper peel prevention part 60 can be improved. This makes it difficult for the upper peel prevention part 60 to deform, so that the engagement between the upper peel prevention part 60 and the lower peel prevention part 61 becomes difficult to disengage.

<Second embodiment>
Next, a second embodiment of the present invention will be described with reference to the drawings. Note that for convenience of explanation, only the constituent parts that are different from the first embodiment described above will be explained.

The seat frame 1 shown in FIGS. 19 to 21 is provided with an armrest 7 that supports the arms of a person seated on a vehicle seat.
The armrest 7 is rotatably attached to the side surface of the seat frame 1 in the front-rear direction, and is provided with a cushion pad and covered with a skin, although not shown.
The armrest 7 in this embodiment is in a horizontal state (approximately horizontal state) even when the seat back frame 3 is reclined in a state of use in which it supports a person's arm as shown in FIGS. 19 and 20. (including a near-horizontal state) can be maintained without any change in angle. On the other hand, in a stowed state in which a person's arm is not supported, as shown in FIG. 21, the structure is such that the stowed state can be maintained.
In addition, although the armrest 7 in this embodiment shall be provided on both the right and left sides of a vehicle seat, below, the case where it is provided on the right side of a vehicle seat will be described. Further, in this embodiment, the armrests 7 are provided on both the left and right sides of the vehicle seat, but they may be provided only on either the left or the right.

As shown in FIGS. 22 and 23, this armrest 7 includes a mounting bracket 70, a main frame 71, a link mechanism 72, a biasing member 73, and an angle regulating means 74. 72 includes the reclining mechanism 4 described above.
Note that the biasing member 73 in this embodiment is a tension spring, and is configured so that a biasing force acts in a direction that draws together a portion where one end of the tension spring is hooked and a portion where the other end is hooked. has been done.

The mounting bracket 70 is attached to the outer surface (right side) of the right back side frame 31 of the seat back frame 3. A main frame 71 is attached to the mounting bracket 70 via a link mechanism 72, a biasing member 73, and an angle regulating means 74.
The mounting bracket 70 is formed into a hollow box shape, including a box portion 70a that is attached to the back side frame 31 and a lid portion 70b that closes the opening of the box portion 70a. It is being A through hole 700 passing through the outer surface of the mounting bracket 70 from side to side is formed in the center of the lid portion 70b, into which a tip of a pivot pin 727 (described later) is inserted and fixed.

The main frame 71 includes a main body plate 710 vertically arranged to face the backside frame 31, a flange 711 integrally formed continuously on the peripheral edge of the main frame 710, and a rear end of the main frame 71. A first hook part 712 integrally formed with the flange 711 is provided near the top of the part.

The main body plate portion 710 is formed so that the vertical dimension gradually becomes shorter from the base end portion attached to the mounting bracket 70 toward the distal end portion.
In addition, a through hole 710a that constitutes the rotation center (joint C) of the armrest 7 is formed in the center of the base end, and a stopper pin (described later) is provided above the through hole 710a at the base end. The slot hole 710b into which the slot 741 is inserted is curved into a semicircular shape.
The flange 711 is formed to protrude outward from the peripheral edge of the main body plate portion 710 (to the right in this embodiment).
The first hook portion 712 is a portion on which one end of the tension spring serving as the biasing member 73 is hooked, and is formed to protrude further outward from the tip of the flange 711 . Note that this first hook portion 712 may be formed with a hole through which one end of a tension spring serving as the biasing member 73 is passed.

As shown in FIGS. 19 and 20, the link mechanism 72 is a parallel link mechanism in which the components of the link mechanism 72 maintain a parallel positional relationship when the seat back frame 3 is reclined. .
As shown in FIGS. 18 to 23, such a link mechanism 72 includes a first link 720, a second link 721, a fixed bracket 722, a bearing member 723, a first rotating shaft member 724, and a second link 720. The rotating shaft member 725, the washer member 726, the pivot pin 727, the rotating shaft 4a in the reclining mechanism 4 (referred to as joint D), and the third bracket 43 in the reclining mechanism 4 (second bracket 42 in the case of the left side) It is composed of and.

The first link 720 is a plate-shaped link that constitutes the upper link in the link mechanism 72, and is elongated in the front-rear direction.
The first link 720 also has a first through hole 720a that forms the center of rotation (joint C) of the armrest 7 at its front end, and a second through hole 720b into which a stopper pin 741 is inserted at the center. , and a third through hole 720c that becomes a connection part (referred to as joint A) with the second link 721.

The second link 721 is a plate-shaped link that constitutes a rear link in the link mechanism 72, and is formed to be elongated in the vertical direction.
The second link 721 also has a first through hole 721a at its upper end that serves as a connection to the first link 721, and a connection to the fixed bracket 722 (referred to as joint B) at its lower end. A second through hole 721b is formed.

The fixed bracket 722 is fixed to the flange 43b at the rear edge of the upper end of the third bracket 43. The fixing bracket 722 is formed with a through hole (not shown) that serves as a connection part (joint B) with the second link 721.
Note that in this embodiment, the fixed bracket 722 is fixed to the third bracket 43 and is in an integral state, but the fixed bracket 722 and the third bracket 43 are not limited to this. may be formed. By integrally forming the fixed bracket 722 and the third bracket 43, the link mechanism 72 can be configured without increasing the number of parts. In addition, when fixing the separate fixing bracket 722 and the third bracket 43 in an integral state as in this embodiment, the fixing position of the fixing bracket 722 can be adjusted as appropriate, and the fixing position of the fixing bracket 722 including the link mechanism 72 Armrest 7 is easy to design.

The bearing member 723 (also referred to as a bush) is formed in a cylindrical shape with a cylindrical hole 723a, and a pivot pin 727 is inserted through the cylindrical hole 723a.
The outer contour of the cylindrical wall portion 723b constituting the cylindrical hole portion 723a is formed to have three different diameters, and the portion with the longest diameter is fixed to the mounting bracket 70. The part with the shortest diameter is a part that passes through each through hole in the main frame 71, the first link 720, a washer member 726 (described later), and a pivot bracket 740 (described later).

The first rotating shaft member 724 is passed through the third through hole 720c in the first link 720 and the first through hole 721a in the second link 721, and rotatably connects the first link 720 and the second link 721. It is something to do.
In this embodiment, a rivet is used as the first rotating shaft member 724, and after passing through the third through hole 720c in the first link 720 and the first through hole 721a in the second link 721, As shown in FIG. 2, the tip is crushed so that the first link 720 and the second link 721 can be connected.

The second rotating shaft member 725 is passed through the second through hole 721b in the second link 721 and the through hole in the fixed bracket 722, and rotatably connects the second link 721 and the fixed bracket 722.
In this embodiment, a rivet is used like the first rotating shaft member 724, and as shown in FIG. 22, the tip is crushed so that the second link 721 and the fixed bracket 722 can be connected. It has become.

The washer member 726 is an annular plate-shaped member with a through hole in the center, and is provided to be sandwiched between a pivot pin 727 and a pivot bracket 740, which will be described later.

Pivot pin 727 is a shaft member that is passed toward through hole 700 in mounting bracket 70 .
The pivot pin 727 has a first shaft portion 727a formed at the tip with a short diameter, a second shaft portion 727b with a longer diameter than the first shaft portion 727a, and an inner diameter of the through hole of the washer member 726. The flange portion 727c has a longer outer diameter than the flange portion 727c.
The first shaft portion 727a and the second shaft portion 727b are passed through the cylindrical hole portion 723a of the bearing member 723, and the first shaft portion 727a is passed through the through hole 700 of the mounting bracket 70. The first shaft portion 727a is fixed on the inner surface of the lid portion 70b of the mounting bracket 70.
The flange portion 727c is in contact with the outer surface of the washer member 726.

The angle regulating means 74 is a means for keeping the main frame 71 at a constant angle by being used together with the link mechanism 72 and the biasing member 73, and in use, it keeps the main frame 71 in a horizontal state. In the stored state, the storage state is maintained.
Such angle regulating means 74 includes a pivot bracket 740 and a stopper pin 741.

The pivot bracket 740 is a plate-shaped body formed in a substantially oval shape, and a second hook portion 740a on which the other end of the tension spring serving as the biasing member 73 is hooked is integrally formed at the front end portion. The second hook portion 740a protrudes in the same direction (outside) as the first hook portion 712, and the position of the tip of the second hook portion 740a in the protrusion direction is set approximately equal to the position of the tip of the first hook portion 712 in the protrusion direction. .
Further, a first through hole 740b through which the cylindrical wall portion 723b of the bearing member 723 passes is formed in the center of the pivot bracket 740, and a second through hole 740b through which the stopper pin 741 passes through the rear end of the pivot bracket 740. A through hole 740c is formed.

The stopper pin 741 functions to maintain the horizontal state of the main frame 71, and is passed through the second through hole 740c in the pivot bracket 740 and the slot hole 710b in the main frame 71.
In this embodiment, a rivet is used as the stopper pin 741, and after passing through the second through hole 740c in the pivot bracket 740 and the slot hole 710b in the main frame 71, the tip is crushed. The frame 71 and the pivot bracket 740 can be connected.

As shown in FIGS. 19 and 20, the link mechanism 72 includes a joint A, a joint B, a joint C based on the rotation center of the armrest 7, and a joint D based on the rotation axis 4a, which is the rotation center of the seatback frame 3. The seat back frame 3, the first link 720, and the second link 721 are configured to be able to rotate about the axis.
When the seat back frame 3 is reclined and the link mechanism 72 operates, the positions of the joint B and the joint D do not change because they each include the reclining mechanism 4. On the other hand, since the position of the joint A and the position of the joint C vary depending on the position of the seat back frame 3, the first link 720 and the second link 721 rotate.
The tension spring serving as the biasing member 73 biases the first hook portion 712 of the main frame 71 and the second hook portion 740a of the pivot bracket 740 in a direction above the pivot pin 727. There is. At this time, a biasing force acts on the main frame 71 to rotate in the direction of the arrow Y1, but since the stopper pin 741 is in contact with the rear end of the slot hole 710b, the main frame 71 (i.e., the armrest 7) The horizontal state can be maintained. Moreover, the horizontal state of the main frame 71 can be maintained even if the reclining angle of the seat back frame 3 is changed.

The stored state of the armrest 7 refers to a state in which the armrest 7 is rotated so that the longitudinal direction of the armrest 7 and the longitudinal direction of the seat back frame 3 are aligned, as shown in FIG.
To place the armrest 7 in the stored state, the main frame 71 is rotated so as to be lifted upward. At this time, the stopper pin 741 is separated from the rear end of the slot hole 710b, and the biasing member 73 is displaced from the state above the pivot pin 727 to the state below. Since this biasing member 73 tries to pull the first hook portion 712 and the second hook portion 740a together, a bias force acts on the main frame 71 to rotate it in the direction of the arrow Y2. Then, the reduction of the biasing force by the biasing member 73 (the tension spring that is the biasing member 73 is fully compressed) is aligned with the position where the length direction of the armrest 7 and the length direction of the seat back frame 3 are aligned. By placing the main frame 71 (armrest 7) in a stored state, the main frame 71 (armrest 7) can be kept in a stored state.

When moving the main frame 71 from the stored state to the horizontal state, initially the biasing force of the biasing member 73 acts in the direction of arrow Y2, but the main frame 71 is rotated downward against this biasing force. When the stopper pin 741 and the rear end of the slot hole 710b are moved gradually, the position of the biasing member 73 is also gradually displaced upward.
When the position of the biasing member 73 is displaced above the pivot pin 727 and the stopper pin 741 and the rear end of the slot hole 710b are brought closer together, a biasing force is applied to the main frame 71 in the direction of the arrow Y1. works.
When the stopper pin 741 comes into contact with the rear end of the slot hole 710b, the main frame 71 becomes horizontal, and can be maintained in the horizontal state by the urging force of the urging member 73.

In the illustrated example, the main frame 71 is open toward the outside (right side in this embodiment), but the main frame 71 has a cover frame (not shown) that covers the open part. shall be established. On top of that, a cushion pad is provided around the main frame 71 and the cover frame, and a skin is further covered.

According to this embodiment, when the seat back frame 3 is tilted relative to the cushion frame 2 by the reclining mechanism 4 and the link mechanism 72 is displaced, the main frame 71 is maintained in a horizontal state by the angle regulating means 74, Since the main frame 71 is urged forward in the rotational direction by the biasing member 73, no matter what angle the seat back frame 3 is tilted relative to the cushion frame 2 by the reclining mechanism 4, the link mechanism 72 will not be displaced. The horizontal state of the main frame 71 can be maintained to the extent possible. This makes it possible to maintain the armrest 7 in a horizontal state with a simpler structure than in the past.

The biasing member 73 is a tension spring whose one end is hooked on the first hook 712 of the main frame 71 and the other end is hooked on the second hook 740a of the angle regulating means 74. The first hook portion 712 of the frame 71 can be drawn to the second hook portion 740a of the angle regulating means 74, and the main frame 71 can be easily biased.

In addition, in the stored state in which the main frame 71 is rotated rearward so that the length direction of the main frame 71 and the length direction of the side surface of the seat back frame 3 are aligned, the biasing member 73 rotates the main frame 71 in the rotational direction. Since the bias is applied to the rear side, no matter what angle the seat back frame 3 is tilted with respect to the cushion frame 2 by the reclining mechanism 4, the main frame 71 cannot be retracted within the range where the link mechanism 72 can be displaced. state can be maintained.

[Modified example]
Note that the embodiments to which the present invention is applicable are not limited to the embodiments described above, and can be modified as appropriate without departing from the spirit of the present invention. Modifications will be described below. The following modifications may be combined as much as possible.
Furthermore, in each of the following modifications, elements common to the above embodiments are given the same reference numerals, and the description thereof will be omitted or simplified.

[Modification 1]
In the seat frame 1 in this modification, as shown in FIG. 24, the left and right back side frames 30 and 31A forming the seat back frame 3 both have a closed cross-sectional structure.
That is, in this modification, unlike the above-described embodiment, the right backside frame 31A is integrally formed as a hollow body with a closed cross-section structure that combines the right side divided body 31a and the left side divided body 31b. There is.

The right side divided body 31a is formed symmetrically with the left side divided body 30a in the above embodiment, and the left side divided body 31b is formed symmetrically with the right side divided body 30b in the above embodiment.

In addition, since the right back side frame 31A has a closed cross-section structure, instead of the U-shaped upper pipe frame 32 in the above embodiment, a single upper pipe frame 32A extending in the horizontal direction and a single upper pipe frame 32A extending in the horizontal direction are used. A single middle pipe frame 32B extending from the middle pipe frame 32B is used.
Furthermore, in the reclining mechanism 4 as well, a second bracket 42 configured symmetrically to the second bracket 42 may be used instead of the third bracket 43 in the above embodiment. In this case, the right cushion side frame 21 of the cushion frame 2 may also have a closed cross-sectional structure like the left cushion side frame 20.

According to this modification, the left and right back side frames 30, 31A constituting the seat back frame 3 have a closed cross-section structure, so the seat back frame 3 The rigidity of the material can be improved.
Further, the guide bracket 34 for the seat belt can be attached not only to one backside frame 30 but also to both backside frames 30 and 31A. For example, the guide bracket 34 may not be able to be provided on a narrow seat among rear seats in which three seats are arranged side by side in a row. In such a case, the left and right backside frames 30, 31A of one seat adjacent to the narrow seat have a closed cross-section structure, and a guide bracket 34 for the narrow seat is provided at the upper end thereof. The guide brackets 34 for the adjacent sheets are respectively attached. This makes it possible to cope with the case where the guide bracket 34 cannot be provided on a narrow seat.

[Modification 2]
As shown in FIG. 24, the upper pipe frame 32 of the seat back frame 3 in this modification is provided with a reinforcing frame 35.
The reinforcing frame 35 is a diagonal frame that is diagonally bridged and fixed between the lower pipe 32c in the upper pipe frame 32, the intermediate pipes 32b on the left and right sides of the lower pipe 32c, and the back side frame 30 on the left side. It is a material.
That is, one reinforcing frame 35 is provided diagonally so as to straddle the bend between the lower pipe 32c and the intermediate pipe 32b, and the other reinforcing frame 35 is provided between the lower pipe 32c and the left back side frame. It is provided diagonally so as to straddle the part where it touches 30.

According to this modification, a truss structure constituted by the left backside frame 30, the upper pipe frame 32, and the reinforcing frame 35 can be formed at the position where the upper pipe frame 32 is provided. The rigidity of the seat back frame 3 can be improved.

[Modification 3]
The seat back frame 3 in this modification includes an upper pipe frame 32C consisting of an upper pipe 32a and an intermediate pipe 32b, as shown in FIG. 26, instead of the U-shaped upper pipe frame 32 in the above embodiment. A plate-shaped middle frame 32D is used.

The middle frame 32D is formed into a plate shape and is provided to span between the left and right back side frames 30 and 31. In this embodiment, the middle frame 32D is spanned between the rear surfaces of the left and right back side frames 30, 31, but is not limited to this, and is spanned between the front surfaces of the left and right back side frames 30, 31. Alternatively, it may be bridged between intermediate portions in the front-rear direction.

Further, left and right connecting frames 36 are installed to span between the middle frame 32D and the lower pipe frame 33.
The connecting frame 36 has a web and left and right flanges, and is provided not only to connect the middle frame 32D and the lower pipe frame 33, but also to improve the rigidity of the entire seatback frame 3. There is.

According to this modification, since the middle frame 32D is formed into a plate shape, it is easy to attach other components to the middle frame 32D, such as a dynamic damper for damping vibrations and a cover for covering the seat back frame. Become.
Further, since the middle frame 32D and the lower pipe frame 33 can be connected by the connecting frame 36, this connecting frame 36 can also be used to attach other members like the middle frame 32D. Furthermore, by connecting the middle frame 32D and the lower pipe frame 33, the rigidity of the seat back frame 3 can be improved.

[Modification 4]
In the cushion frame 2 in this modification, instead of the front pipe frame 23 in the above embodiment, as shown in FIG. , and a front pipe frame 23A that is bent upward is used.

To explain in more detail, the front pipe frame 23A includes left and right side ends 231, 232 held by the left and right cushion side frames 20, 21, and a central part 230 provided between these left and right side ends 231, 232. , is provided.
While the left and right end portions 231 and 232 extend forward, the center portion 230 is bent rearward and upward.
Bent parts 230a and 230b are formed between the central part 230 and the left and right end parts 231 and 232, and the direction in which the central part 230 is bent is determined at the bent parts 230a and 230b.

Furthermore, pressure receiving members 26a and 26b are provided to bridge between the center portion 230 of the front pipe frame 23A and the back pipe frame 22, and to receive the load of a person sitting on the vehicle seat.
The pressure receiving members 26a and 26b are wires, and the front portion of the seat is bent upward corresponding to the center portion 230 of the front pipe frame 23A. Further, one of the pressure receiving members 26a has a front end portion bent in a U-shape and protrudes forward from the center portion 230. The other pressure-receiving member 26b has its front end hooked to the center portion 230.

It is assumed that the seat rear side portions of the pressure receiving members 26a and 26b are hooked to the back pipe frame 22.
The intermediate portions of the pressure receiving members 26a, 26b are set at approximately the same height as the left and right end portions 231, 232 of the front pipe frame 23A.
Furthermore, the cushion frame can be shaped by these pressure receiving members 26a and 26b.

Such a cushion frame 2 is provided with a cushion pad (not shown) and covered with an outer skin. The cushion pad is formed so that the center of the front end portion thereof swells in accordance with the protruding state of the central portion 230 of the front pipe frame 23A.

According to this modification, the center of the front end of the cushion frame 2 can be formed to bulge upward, making it difficult for a person sitting on the vehicle seat to move forward of the seat. This can prevent the body from sinking, for example, in the event of a vehicle collision.

1 Seat frame 2 Cushion frame 20 Cushion side frame 20a Left side divided body 20b Right side divided body 21 Cushion side frame 22 Back pipe frame 22a Mounted part 23 Front pipe frame 24 Anchor point 3 Seat back frame 30 Back side frame 30a Left side divided body 30b Right side Divided body 31 Back side frame 32 Upper pipe frame 33 Lower pipe frame 34 Guide bracket 4 Reclining mechanism 4a Rotating shaft 40 Round recliner 41 First bracket 42 Second bracket 42a Flange 42b Flange 42c Bend plate part 43 Third bracket 5 Seat support part 50 Horizontal slide rail 50a Fixed rail 50b Movable rail 51 Horizontal slide rail 51a Fixed rail 51b Movable rail 52 Foot bracket 53 Foot bracket 54 Foot bracket 55 Foot bracket 56 Connection member 6 Peeling prevention structure 60 Upper peeling prevention part 602 Upper engaging part 61 Lower peeling prevention part 612 Lower engaging part 7 Armrest 70 Mounting bracket 71 Main frame 710b Slot hole 712 First hook part 72 Link mechanism 720 First link 721 Second link 722 Fixed bracket 723 Bearing member 724 First rotating shaft member 725 Second rotating shaft member 726 Washer member 727 Pivot pin 73 Biasing member 74 Angle regulating means 740 Pivot bracket 740a Second hook part 741 Stopper pin A Joint B Joint C Joint D Joint W Welding part

Claims (10)

A vehicle seat comprising a cushion frame that supports a seat back frame serving as a backrest and forms a skeleton of a seat cushion that supports a person's thighs and buttocks,
The cushion frame has left and right cushion side frames spaced apart from each other,
At least one of the left and right cushion side frames has a hollow closed cross-sectional structure with an open rear end side,
A plate-shaped bracket that protrudes from the seat back frame side and is fixed to the cushion side frame that has the closed cross-section structure is inserted into the opening of the cushion side frame that has the closed cross-section structure,
The cushion side frame having a closed cross-section structure and the plate-shaped bracket are connected to each other at at least two fixed points in front and rear of the position where the cushion side frame and the plate-shaped bracket overlap. Vehicle seat. The cushion frame has a back pipe frame that connects rear end portions of the left and right cushion side frames,
At least the end portion of the back pipe frame on the side of the cushion side frame having the closed cross-section structure among both longitudinal ends thereof passes through the cushion side frame having the closed cross-section structure from side to side. The vehicle seat according to claim 1. The cushion side frame having a closed cross-section structure and the plate-shaped bracket are connected at the fixed point in front of the back pipe frame and at the fixed point behind the back pipe frame. The vehicle seat according to claim 2. The vehicle seat according to any one of claims 1 to 3, wherein a side surface of the cushion side frame having a closed cross-section structure is formed with a recess that is recessed toward the inside. . comprising front and rear lateral slide rails that are fixed to the front and rear sides of the cushion frame and slide the cushion frame in the left-right direction;
5. The vehicle seat according to claim 4, wherein the recessed portion is provided rearward from a location where the front side slide rail is fixed to the cushion frame. The two front and rear fixed points are fixed with bolts,
Any one of claims 1 to 5, wherein the bolt passes through the cushion side frame having a closed cross-section structure from side to side, and fixes the cushion side frame to the plate-shaped bracket. Vehicle seats as described in Section. The cushion frame has a back pipe frame that connects rear end portions of the left and right cushion side frames,
Of both lengthwise ends of the back pipe frame, at least the end on the side of the cushion side frame having the closed cross-section structure is closer to the point where the cushion side frame having the closed cross-section structure is fixed to the plate-shaped bracket. The vehicle seat according to any one of claims 1 to 6, wherein the vehicle seat is also provided below. comprising a reclining mechanism for tilting the seat back frame with respect to the cushion frame, and a seat support section for supporting the vehicle seat on the floor,
The seat back frame has left and right back side frames spaced apart from each other,
The reclining mechanism rotatably connects the plate-shaped bracket fixed to the cushion side frame having a closed cross-section structure and the back side frame,
Any one of claims 1 to 7, wherein the fixing location of the cushion side frame having a closed cross-section structure and the plate-shaped bracket is provided at a position that overlaps the reclining mechanism in the vertical direction. The vehicle seat described in paragraph 1. The cushion frame has a back pipe frame that connects rear end portions of the left and right cushion side frames,
9. The vehicle seat according to claim 8, wherein the back pipe frame is fixed to the cushion side frame having the closed cross-section structure at a position overlapping the reclining mechanism in the vertical direction. The seat frame configured to include the cushion frame and the seat back frame is provided with a cushion pad and covered with an outer skin,
The seat frame is installed on the floor of the vehicle body via a pair of left and right front and rear slide rails for sliding the seat frame in the front and back direction of the vehicle body. vehicle seat.

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