JP7372214B2 - seat support device - Google Patents

Description

The present invention relates to a seat support device in which a bracket is welded to a plate.

Patent Document 1 describes a seat support device in which a bracket is welded to an upper rail.
As shown in FIG. 11, after the bracket 63 is placed on the upper rail 62, the two are connected by laser welding. The bracket 63 has a flat plate part 64 extending parallel to the top wall of the upper rail 62 and a vertical wall part 65 extending upward from the end of the flat plate part 64 in the width direction. Weld beads 66 as welded parts welded to the upper rail 62 are formed at two locations on the bracket 63. The weld bead 66 extends forward from the rear end in the front-rear direction at an angle so as to be away from the vertical wall 65, and then bends toward the vertical wall 65 and further approaches the vertical wall 65. It is slanted and extends in a dogleg shape.

JP2009-202814A

As shown in FIG. 11, in the seat support device 60 of Patent Document 1, when a belt anchor (not shown) for fixing the seat belt is attached to the vertical wall portion 65 of the bracket 63, the upper rail is attached to the belt anchor. When a load is applied in a direction away from 62, stress is applied to flat plate portion 64 from the rear to the front by the belt anchor. Specifically, stress is applied in an upward direction (on the near side with respect to the plane of FIG. 11) while moving away from the vertical wall portion 65 side in the width direction. Since this stress is concentrated at the rear end 66a of the welded portion, there is a problem in that the welded portion is likely to peel off from the rear end 66a. The present invention has been made in view of these circumstances, and an object of the present invention is to provide a seat support device that can suppress peeling of a welded portion in a bracket.

A seat support device for solving the above problem includes a plate and a pair of brackets that are attached to the plate in a welded state and support the seat, and each of the pair of brackets is welded to the plate. A flat plate portion having a welded portion is provided, and at least one of the pair of flat plate portions is provided with a mounting portion for attaching a belt anchor for fixing a seat belt, and the opposite directions of the pair of flat plate portions are provided. The welded portion of the flat plate portion provided with the attachment portion is defined as the inside, the direction opposite to the direction facing each other is the outside, the front side of the sheet is the front, and the rear side of the sheet is the rear. The gist is that the welding part has an inclined part extending forward while being inclined outward from the rear end part of the welded part.

According to this configuration, since the welding part has an inclined part that extends forward while being inclined outward from the rear end part, the belt anchor moves the mounting part away from the plate (in the forward direction). When a load is applied in a direction that is inclined both upwardly and inwardly, the stress applied to the welded part can be dispersed by the inclined part. Since the durability of the weld can be improved compared to a mode in which stress is concentrated at one point in the weld, peeling of the weld can be suppressed.

Regarding the seat support device, it is preferable that at least a portion of the inclined portion be located further back of the flat plate portion than the attachment portion. When a load is applied to the attachment part by the belt anchor in the direction away from the plate (in a direction tilted both upward and inward relative to the front), stress is applied from the outer side of the rear end of the flat plate part. Likely to happen. By locating at least a portion of the inclined portion at the rear of the flat plate portion than the attachment portion, the inclined portion can be provided at a position closer to the location where stress is generated. Therefore, it is possible to respond more quickly to stress generation and suppress peeling of the welded portion.

In the seat support device, it is preferable that the welded portion having the sloped portion is continuous with the sloped portion and has a front folded portion that is folded back from the rear end of the welded portion to the front of the flat plate portion. . According to this configuration, by having the front folded portion in addition to the inclined portion, it is possible to improve the bonding force of the welded portion.

In the seat support device described above, it is preferable that the welded portion having the sloped portion has an extension portion that extends forward continuously from the sloped portion in front of the sloped portion. According to this configuration, by having the extending portion in addition to the inclined portion, it is possible to improve the bonding force of the welded portion.

In the seat support device, the welded portion having the sloped portion is continuous from the sloped portion in front of the sloped portion, and has a rear folded portion that bends inward of the flat plate portion and folds back. It is preferable that According to this configuration, by having the rear folded portion in addition to the inclined portion, it is possible to improve the bonding force of the welded portion.

According to the seat support device of the present invention, peeling of the welded portion in the bracket can be suppressed.

FIG. 3 is a perspective view of the seat support device with the seat attached. FIG. 3 is a perspective view of the seat support device. FIG. 3 is a side view of the seat support device. A cross-sectional view taken along line 4-4 in FIG. 3. FIG. 3 is a plan view of the seat support device. A plan view of the bracket. FIG. 3 is a perspective view of the rear side of the seat support device. FIG. 7 is a plan view of a modified example bracket. The top view of the bracket of another modification. The top view of the bracket of yet another example of a change. FIG. 1 is a perspective view of a prior art seat support device.

An embodiment in which the seat support device is implemented as a seat slide device 10 will be described with reference to FIGS. 1 to 7.
The seat slide device 10 slidably supports a seat 12 of a vehicle. The seat 12 includes a seat cushion 12a and a seat back 12b rotatably attached to the seat cushion 12a.

As shown in FIGS. 1 and 2, the seat slide device 10 includes a pair of lower rails 21, a pair of upper rails 22 as plates movably attached to the pair of lower rails 21, and a pair of upper rails 22 welded to the pair of upper rails 22. The seat 12 is provided with a bracket that is attached to the seat 12 and supports the seat 12.

The brackets include a pair of first brackets 30 that support the front side of the seat 12 and a pair of second brackets 40 that support the rear side of the seat 12. A link 14 is attached to the first bracket 30 and the second bracket 40. A cushion frame 13 is attached to each link 14, and this cushion frame 13 holds a seat cushion 12a. Since the link 14 is configured to be height adjustable, the height of the seat 12 can be adjusted.

As shown in FIG. 3, a belt anchor 15 for fixing a seat belt (not shown) is attached to the right second bracket 40a of the pair of second brackets 40 when facing the front of the vehicle. A buckle 16 is connected to the belt anchor 15, and the seat belt is fixed to this buckle 16.

Here, when the seat slide device 10 is installed on the vehicle floor, the direction along the front-rear direction of the vehicle is referred to as the "front-rear direction DY", and the direction along the width direction of the vehicle is referred to as the "width direction DX". The direction along the vertical direction is referred to as the "vertical direction DZ." In the longitudinal direction DY, the front side of the seat 12 is the front side, and the rear side of the seat 12 is the rear side. The left side toward the front of the vehicle is defined as the left side in the width direction DX, and the right side is defined as the right side in the width direction DX.

In the width direction DX, the direction in which the pair of brackets face each other is defined as inward, and the direction opposite to the direction in which they face each other is defined as outward.
In this embodiment, a seat slide device 10 that supports a left seat 12 in a vehicle in which two seats 12 are arranged side by side in the width direction DX will be described.

The lower rail 21, upper rail 22, first bracket 30a, and second bracket 40a on the right side in the width direction DX in the seat slide device 10 will be described below. The lower rail 21, upper rail 22, first bracket 30b, and second bracket 40b on the left side in the width direction DX are as described below, except for the presence or absence of a mounting portion 47 for attaching a belt anchor 15, which will be described later, and the shape of the welded portion. It has a shape that is symmetrical in the left-right direction.

As shown in FIG. 2, in the following description, the left side in the width direction DX can be rephrased as inward. Similarly, the right side in the width direction DX can be rephrased as the outer side.
The lower rail 21 will be explained.

As shown in FIG. 4, the lower rail 21 includes a plate-shaped bottom wall 21a fixed to the vehicle floor. A pair of side walls 21b extending upward along the vertical direction DZ are provided at both ends of the bottom wall 21a in the width direction DX. A pair of horizontal walls 21c that extend inward of the bottom wall 21a in the width direction DX are provided at ends of the pair of side walls 21b on the side opposite to the bottom wall 21a. A pair of vertical walls 21d extending downward along the vertical direction DZ are provided at the ends of the pair of horizontal walls 21c opposite to the side wall 21b. A pair of vertical walls 21d are provided at intervals, and a gap is formed between the vertical walls 21d. The lower rail 21 has an internal space S1 surrounded by a bottom wall 21a, a pair of side walls 21b, a pair of horizontal walls 21c, and a pair of vertical walls 21d. This internal space S1 communicates with the external space via a gap between the vertical walls 21d in the vertical direction DZ.

The upper rail 22 will be explained.
As shown in FIG. 4, the upper rail 22 includes a plate-shaped top wall 22a extending parallel to the vehicle floor. A pair of side walls 22b extending downward along the vertical direction DZ are provided at both ends of the top wall 22a in the width direction DX. A pair of horizontal walls 22c are provided at ends of the pair of side walls 22b on the side opposite to the top wall 22a, each extending outside the top wall 22a in the width direction DX. A pair of vertical walls 22d that extend upward along the vertical direction DZ are provided at ends of the pair of horizontal walls 22c on the opposite side to the side wall 22b. The upper rail 22 has an internal space S2 surrounded by a ceiling wall 22a and a pair of side walls 22b.

The upper rail 22 is slidably attached to the lower rail 21 with the pair of horizontal walls 22c inserted into the internal space S1 of the lower rail 21 through a gap formed between the pair of vertical walls 21d of the lower rail 21. That is, the upper rail 22 is attached to the lower rail 21 so as to be movable in the longitudinal direction DY relative to the lower rail 21. With the upper rail 22 attached to the lower rail 21, the horizontal wall 22c of the upper rail 22 and the horizontal wall 21c of the lower rail 21 overlap in the vertical direction DZ, so that the upper rail 22 is attached to the lower rail 21 in the vertical direction DZ. is inhibited from leaving.

The first bracket 30a will be explained.
As shown in FIGS. 3 and 5, the first bracket 30a that supports the front side of the seat includes a flat plate part 31 extending parallel to the top wall 22a of the upper rail 22, and a flat plate part 31 extending upward and downward from the inner end of the flat plate part 31. It has a vertical wall portion 32 extending upward in the direction DZ. The vertical wall portion 32 is provided with a through hole 32a for attaching the link 14.

The flat plate portion 31 is configured to have an elongated shape along the front-rear direction DY. The flat plate portion 31 is provided with two welded portions 33 and 34 welded to the top wall 22a of the upper rail 22. Each welding part 33, 34 is arranged in parallel in the front-rear direction DY.

As shown in FIG. 5, the welded portions 33 and 34 are linear.
The welded part (hereinafter also referred to as "first welded part") 33 located at the front is configured in a V-shape with a convex front side. Specifically, the first welded part 33 has two straight parts 33a and 33b, and a connecting part 33c that connects the straight parts 33a and 33b. The straight portions 33a located on the outside extend along the front-rear direction DY, and the straight portions 33b located on the inside extend inwardly toward the rear.

The welding part (hereinafter also referred to as "second welding part") 34 located at the rear is configured in a U-shape with a convex rear side. Specifically, the second welding part 34 has two parallel straight parts 34a and 34b, and a curved connecting part 34c that connects the straight parts 34a and 34b. Each straight portion 34a, 34b extends along the front-rear direction DY.

Here, linear means an elongated shape like a line. Specifically, linear means an elongated shape in which the dimension in the length direction is five times or more the dimension in the width direction.

Further, the welded portion refers to a location where the flat plate portion 31 and the top wall 22a of the upper rail 22 are welded. The welded portion has a shape that swells in the thickness direction of the flat plate portion 31 as a weld bead.

The method for forming the welded portions 33 and 34 is not particularly limited, and any known welding method may be employed. Examples of known welding methods include laser welding, arc welding, and electron beam welding. Among these, laser welding is preferred because it is easy to weld relatively narrow areas.

The second bracket 40 will be explained.
As shown in FIGS. 4 and 6, the second bracket 40 that supports the rear side of the seat includes a flat plate part 41 extending parallel to the top wall 22a of the upper rail 22, and a flat plate part 41 extending from the outer end of the flat plate part 41. It has an outer vertical wall portion 42a extending upward in the vertical direction DZ, and an inner vertical wall portion 42b extending upward in the vertical direction DZ from the inner end of the flat plate portion 41. A through hole 48 (see FIG. 2) for attaching the link 14 is provided in the inner vertical wall portion 42b.

The rear end portion of the flat plate portion 41 is located rearward of the center portion of the upper rail 22 in the front-rear direction DY.
The outer vertical wall portion 42a is provided with a through hole (hereinafter also referred to as "attachment section") 47 for attaching a belt anchor 15 for fixing a seat belt. In addition, in FIG. 6, only the screw member which comprises the belt anchor 15 is shown for convenience. Since the attachment portion 47 is provided on the outer vertical wall portion 42a, the attachment portion 47 is provided on the outer side of the flat plate portion 41.

Here, the outer side of the flat plate part 41 means the outer side with respect to the central part of the flat plate part 41 in the width direction DX.
As shown in FIG. 6, the flat plate portion 41 is configured to have an elongated shape along the front-rear direction DY. The flat plate portion 41 is provided with two welded portions 43 and 44 welded to the top wall 22a of the upper rail 22. Each welding part 43, 44 is arranged in parallel in the front-rear direction DY.

As shown in FIG. 6, the welded portions 43 and 44 are linear.
The welded part (hereinafter also referred to as "first welded part") 43 located at the front is configured in a C-shape with an open inner side. Specifically, the first welded portion 43 includes a linear extension portion (hereinafter also referred to as an “outward extension portion”) 43a extending in the front-rear direction DY and an inner side from both ends of the outer extension portion 43a. It has a folded portion that is bent back in the front-rear direction DY after being bent. The folded portion that is folded back is referred to as a “rear folded portion 43b”. The folded portion that is folded back forward is referred to as a “front folded portion 43c”. The rear folded portion 43b and the front folded portion 43c have a semicircular curved shape. At the ends of the rear folded portion 43b and the front folded portion 43c on the side opposite to the outer extension portion 43a, there are linear extension portions (hereinafter referred to as “inner extension portions”) extending along the front-rear direction DY. ) 43d. The inner extending portions 43d are provided in a state where they are not connected to each other.

As shown in FIG. 6, the first welded portion 43 is line-symmetrical about the imaginary line L extending in the width direction DX at the center of the first welded portion 43 in the front-rear direction DY. It is configured so that

As shown in FIG. 6, the welded part (hereinafter also referred to as "second welded part") 44 located at the rear is configured in a C-shape with an open inner side. Specifically, the second welded portion 44 includes a linear extension portion (hereinafter also referred to as an “outward extension portion”) 44a extending in the front-rear direction DY, and a linear extension portion 44a extending inward from the front end of the outer extension portion 44a. It has a folded part (hereinafter also referred to as "rear folded part") 44b that is folded back after being bent. The rear folded portion 44b has a semicircular curved shape. At the end of the rear folded portion 44b on the side opposite to the outer extension portion 44a side, there is a linear extension portion (hereinafter also referred to as “first inner extension portion”) extending rearward along the front-rear direction DY. It has 44d.

The second welded portion 44 has an inclined portion 44f that extends linearly toward the front while being inclined outward from the rear end portion 44e of the second welded portion 44. A front end portion of the inclined portion 44f is connected to a rear end portion of the outwardly extending portion 44a. In other words, the outwardly extending portion 44a extends forward continuously from the inclined portion 44f. Further, the rear folded portion 44b is provided continuously from the inclined portion 44f in front of the inclined portion 44f.

The rear end portion 44e of the second welded portion 44 has a folded portion (hereinafter also referred to as a “front folded portion”) 44c that is folded forward continuously from the inclined portion 44f.
The front folded portion 44c is curved and has a smaller radius of curvature than the rear folded portion 44b. A linear extension part (hereinafter also referred to as "second inner extension part") 44g that extends forward along the front-rear direction DY is provided at the end of the front folded part 44c on the opposite side to the inclined part 44f. have. The first inner extending portion 44d and the second inner extending portion 44g are provided in a state where they are not connected.

The shape of the second welded portion 44 in front of the center in the front-back direction DY is the same as the shape of the first welded portion 43 in front of the center in the front-back direction DY.
Note that in the second bracket 40b on the left side in the width direction DX of the seat slide device 10, the second welded portion 44 does not have an inclined portion and has the same shape as the first welded portion 43.

As shown in FIG. 6, the slope angle α of the slope portion 44f with respect to the front-rear direction DY is the slope angle α of the slope portion 44f with respect to the direction of stress applied to the second weld portion 44 from the outer side of the rear end portion of the flat plate portion 41. It is preferable that the extending directions are set to be orthogonal.

The rear end portion 44e of the second welded portion 44 is located rearward of the attachment portion 47, which is a through hole to which the belt anchor 15 is attached. A portion of the inclined portion 44f is configured to be located further rear than the mounting portion 47.

The operation of this embodiment will be explained.
As shown in FIG. 7, when a load is applied to the belt anchor 15 in the direction away from the upper rail 22 (indicated by arrow A, a direction inclined both upward and inward with respect to the front), the second Stress is applied to the flat plate portion 41 of the bracket 40 from the rear toward the front, as shown by arrow B, both upwardly and inwardly. This stress acts to peel off the flat plate portion 41 from the outer side of the rear end portion of the flat plate portion 41. Since the inclined portion 44f of the second welded portion 44 extends in a direction that intersects the direction in which this stress is applied, stress can be prevented from concentrating on one point of the second welded portion 44. In other words, the stress applied to the second welded portion 44 can be dispersed in the inclined portion 44f.

The effects of this embodiment will be explained.
(1) The mounting portion 47 of the outer vertical wall portion 42a of the second bracket 40 is provided on the outer side of the flat plate portion 41, and the second welded portion 44 is connected from the rear end portion 44e of the second welded portion 44. It has an inclined portion 44f that extends forward while being inclined outward.

Since the second welded part 44 has an inclined part 44f that extends forward while being inclined outward from the rear end part 44e, the direction in which the second welded part 44 is separated from the upper rail 22 with respect to the mounting part 47 by the belt anchor 15 ( When a load is applied in a direction that is inclined both upwardly and inwardly with respect to the front, the stress applied to the second welded portion 44 can be dispersed by the inclined portion 44f. Since the durability of the second weld 44 can be improved compared to a mode in which stress is concentrated at one point of the second weld 44, peeling of the second weld 44 can be suppressed.

(2) A portion of the inclined portion 44f is located further back of the flat plate portion 41 than the attachment portion 47. When a load is applied to the mounting portion 47 in a direction away from the upper rail 22 (direction inclined both upward and inward with respect to the front), stress is applied from the outer side of the rear end of the flat plate portion 41. Likely to happen. By locating at least a portion of the inclined portion 44f behind the flat plate portion 41 than the attachment portion 47, the inclined portion 44f can be provided at a position closer to the location where stress is generated. Therefore, it is possible to more quickly respond to stress generation and suppress peeling of the second welded portion 44.

(3) The second welded portion 44 is formed in a linear shape. Therefore, the inclined portion 44f can be easily formed. Furthermore, the area of the second welded portion 44 can be made relatively small. If the area of the second welded portion 44 is relatively large, the second bracket 40 and the upper rail 22 will be easily deformed by the heat of welding. Since the area of the second welded portion 44 is relatively small, the above deformation can be suppressed.

(4) The second welded portion 44 having the sloped portion 44f has a rear folded portion 44b and a front folded portion 44c continuous from the sloped portion 44f. Therefore, by having the rear folded part 44b and the front folded part 44c in addition to the inclined part 44f, the joining force of the second welded part 44 can be improved.

(5) By having the front folded portion 44c continuous with the inclined portion 44f, the inclined portion 44f can be stably formed. That is, in general, it is difficult to keep the welding state constant at the welding start point and the welding end point with respect to other intermediate points. When the second welding part 44 does not have the front folded part 44c, the rear end part 44e of the inclined part 44f becomes the welding start point or the welding end point. Therefore, it is difficult to maintain a constant welding condition between the rear end portion 44e of the inclined portion 44f and the intermediate point, and variations in the welding condition tend to occur. On the other hand, since the second welding part 44 has the front folded part 44c continuous with the inclined part 44f, it is possible to provide a welding start point or a welding end point on the front folded part 44c side. This makes it easier to keep the welding state of the inclined portion 44f constant. By keeping the welded state of the inclined portion 44f constant, the durability of the second welded portion 44 can be improved, so that peeling of the second welded portion 44 can be suitably suppressed.

(6) The inclined portion 44f is connected to the outer extending portion 44a and is also connected to the second inner extending portion 44g via the front folded portion 44c. In other words, both ends of the inclined portion 44f are connected to two extending portions extending forward. Since the second welded portion 44 can be efficiently formed on the elongated flat plate portion 41 having a relatively small dimension in the width direction DX, the bonding force of the second welded portion 44 can be suitably improved. can.

(7) The first welded portion 43 and the second welded portion 44 of the second bracket 40 are configured in a C-shape with an open inner side. Since the inside and outside of the C-shape are in communication, when stress is applied to the mounting portion 47 in the direction of detachment from the upper rail 22 (direction inclined both upward and inward with respect to the front), It is possible to prevent the entire outer portion of the flat plate portion 41 from peeling off except for the C-shaped inner portion. That is, the tensile strength of the part where the inside and outside of the C-shape are connected is higher than the tensile strength between the outside and the inside that straddles the second welding part 44, so the entire outside part of the C-shape peels off. This can be suppressed.

<Other embodiments>
This embodiment can be modified and implemented as follows. This embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

- The shapes of the welded portions 33, 34, 43, and 44 are not limited to linear shapes. That is, the welded portions 33, 34, 43, and 44 may have a shape in which the dimension in the length direction is less than 5 times the dimension in the width direction, and may be configured in a polygonal shape such as a rectangular shape. Good too. The shape may be a circular shape or an oval shape in which an inclined portion is partially provided.

As shown in FIG. 10, for example, the second welded portion 44 may be configured in a triangular shape, and one side of the triangular shape may constitute the inclined portion 44f. When forming the second welded portion 44 into a triangular shape, for example, by irradiating a laser so that the outline is triangular and by irradiating the inside of the outline with the laser, the whole can be made into a triangular shape.

- The sloped portion 44f of the second welded portion 44 is not limited to a linear shape. The inclined portion 44f extends forward from the rear end 44e of the second welded portion 44 while being inclined outward, and the inclined portion 44f has a curved line within a range where the stress applied to the second welded portion 44 can be suitably dispersed. may have.

As shown in FIG. 8, for example, the inclined portion 44f may have a wavy line shape, or may have a shape in which a plurality of straight lines are combined, for example, a jagged shape. A combination of curved lines and straight lines may be used.

- The second welding part 44 may be comprised only of the inclined part 44f.
As shown in FIG. 9, the second welded portion 44 has, for example, an outwardly extending portion 44a, a first inwardly extending portion 44d, a second inwardly extending portion 44g, a rear folded portion 44b, and a front folded portion 44c. It may be configured without any. Further, the second welded portion 44 may be configured without having either the rear folded portion 44b or the front folded portion 44c.

- The inclined part 44f of the second welded part 44 may be formed so that a plurality of dotted welded parts are arranged in parallel and have a linear appearance as a whole.
- In this embodiment, the outer extending portions 44a, 43a, the inner extending portion 43d, the first inner extending portion 44d, and the second inner extending portion 44g are configured linearly, but at least a portion thereof may be configured to extend in a curved manner.

- In this embodiment, the outwardly extending portion 44a was provided between the inclined portion 44f and the rear folded portion 44b, but the outwardly extending portion 44a may be omitted. That is, the rear folded portion 44b may be provided directly following the inclined portion 44f.

- In the present embodiment, a part of the inclined portion 44f in the second welded portion 44 is configured to be located rearward than the attachment portion 47, but the present invention is not limited to this aspect. The entire sloped portion 44f may be configured to be located at the rear of the attachment portion 47, or the entire sloped portion 44f may be configured to be located at the front of the attachment portion 47.

- In the present embodiment, the welded portion has a shape that swells in the thickness direction of the flat plate portion as a weld bead, but it is not limited to this aspect. The welded portion includes, for example, a shape recessed in the thickness direction of the flat plate portion due to welding, and a portion whose color is different from the portion other than the welded portion.

- In this embodiment, a total of four brackets, a pair of first brackets 30 and a pair of second brackets 40, are provided, but the number of brackets is not limited to four. For example, only one pair of brackets (two in total) may be provided, or three or more pairs (six in total) may be provided.

- In this embodiment, the second bracket 40 had two welds, the first weld 43 and the second weld 44, but the number of welds is not limited to two. The welded portion may be formed at only one location, or may be formed at three or more locations.

- In this embodiment, the first welded part 33 and the second welded part 34 of the first bracket 30 may be omitted. For example, the first bracket 30 can be attached to the upper rail 22 by providing screw holes in the flat plate part 31 of the first bracket 30 and the top wall 22a of the upper rail 22, and screwing nuts into screws inserted through these screw holes. Good too.

- In the present embodiment, the outer vertical wall portion 42a of the second bracket 40 is provided with a through hole, which is a mounting portion 47 for attaching the belt anchor 15 for fixing the seat belt, but the outer vertical wall portion 42a is May be omitted. For example, the flat plate portion 41 of the second bracket 40 protrudes outward from the top wall 22a of the upper rail 22, and a through hole is provided at this protruding portion to attach a belt anchor 15 for fixing a seat belt. You can leave it there. Also in this embodiment, the attachment portion 47 is provided on the outer side of the flat plate portion 41.

- The inner vertical wall portion 42b of the second bracket 40 may be provided with a through hole which is an attachment portion 47 for attaching the belt anchor 15 for fixing the seat belt. That is, the attachment portion 47 may be provided on the inner side of the flat plate portion 41. Even if the attachment part 47 is provided on the inner side of the flat plate part 41, the direction in which the attachment part 47 is separated from the upper rail 22 with respect to the belt anchor 15 (the direction inclined both upward and inward with respect to the front) When a load is applied to the flat plate portion 41 of the second bracket 40, stress is applied to the flat plate portion 41 of the second bracket 40, which is inclined both upward and inward from the rear toward the front, as shown by the arrow B in FIG. Since the inclined portion 44f of the second welded portion 44 extends in a direction that intersects the direction in which this stress is applied, stress can be prevented from concentrating on one point of the second welded portion 44.

- In this embodiment, a mounting portion 47 for attaching the belt anchor 15 for fixing the seat belt to the flat plate portion 41 of the second bracket 40a attached to the upper rail 22 on the right side in the width direction DX of the pair of upper rails 22. was provided, but it is not limited to this aspect. An attachment portion 47 for attaching the belt anchor 15 may be provided on the flat plate portion 41 of the second bracket 40b attached to the upper rail 22 on the left side in the width direction DX of the pair of upper rails 22. In both of the pair of upper rails 22, the attachment portions 47 may be provided on the flat plate portions 41 of the second brackets 40a, 40b. That is, it may be configured such that the belt anchors 15 can be attached to both sides of the seat slide device 10.

- The seat slide device 10 of this embodiment is a seat slide device 10 that supports the left seat 12 in a vehicle in which two seats 12 are arranged side by side in the width direction DX, but the seat slide device 10 that supports the right seat 12 It may also be a slide device 10. The seat slide device 10 that supports the right seat 12 has a configuration in which the left and right sides of the seat slide device 10 of this embodiment are reversed.

- Although the seat slide device 10 of this embodiment is used in a vehicle in which two seats 12 are arranged side by side in the width direction DX, it is not limited to this aspect. The present invention may be used in a vehicle in which three or more seats 12 are arranged in parallel in the width direction DX, or in a vehicle in which only one seat 12 is provided.

- In this embodiment, an aspect in which the seat support device is the seat slide device 10 has been described, but the present invention is not limited to this aspect. The seat support device may be configured to support the seat without sliding it. That is, the seat support device may be configured without the upper rail 22 and the lower rail 21. For example, instead of the upper rail 22 as a plate, the vehicle floor or a plate fixed to the vehicle floor may be used as the plate, and a pair of brackets supporting the seat may be attached to this plate in a welded state. good.

DX...Width direction, DY...Anteroposterior direction, DZ...Anteroposterior direction, S1...Internal space, S2...Internal space, 10...Seat slide device, 12...Seat, 12a...Seat cushion, 12b...Seat back, 13...Cushion frame, 14...Link, 15...Belt anchor, 16...Buckle, 21...Lower rail, 21a...Bottom wall, 21b...Side wall, 21c...Horizontal wall, 21d...Vertical wall, 22...Upper rail, 22a...Top wall, 22b...Side wall, 22c... Horizontal wall, 22d... Vertical wall, 30... First bracket, 30a... First bracket on the right side in the width direction DX, 31... Flat plate part, 32... Vertical wall part, 32a... Through hole, 33... First welded part, 33a... straight part, 33b... straight part, 33c... connecting part, 34... second welding part, 34a... straight part, 34b... straight part, 34c... connecting part, 40... second bracket, 40a... right in width direction DX 40b...Second bracket on the left side in the width direction DX, 41...Flat plate part, 42a...Right vertical wall part, 42b...Left vertical wall part, 43...First welded part, 43a...Outer extension Extrusion part, 43b...rear folding part, 43c...front folding part, 43d...inward extending part, 44...second welding part, 44a...outward extending part, 44b...backward folding part, 44c...front folding part, 44d...first 1 inner extension part, 44e... rear end part, 44f... inclined part, 44g... second inner extension part, 60... slide rail, 62... upper rail, 63... bracket, 64... flat plate part, 65... vertical wall part, 66...Welded part, 66a... Rear end part.

Claims (5)

plate and
a pair of brackets that are attached to the plate in a welded state and support the seat,
The pair of brackets each include a flat plate portion having a welded portion welded to the plate,
At least one of the pair of flat plate parts is provided with a mounting part for attaching a belt anchor for fixing the seat belt,
The direction in which the pair of flat plate parts face each other is defined as inward, the direction opposite to the direction in which they face each other is defined as outward, the front side of the sheet is defined as the front, and the rear side of the sheet is defined as the rear;
A seat support device characterized in that the welded portion of the flat plate portion provided with the attachment portion has an inclined portion extending forward while being inclined outward from the rear end of the welded portion. The seat support device according to claim 1, wherein at least a portion of the inclined portion is located further rearward of the flat plate portion than the mounting portion. The sheet according to claim 1 or 2, wherein the welded portion having the sloped portion is continuous with the sloped portion and has a front folded portion that is folded back from the rear end of the welded portion to the front of the flat plate portion. Support device. The seat support according to any one of claims 1 to 3, wherein the welded portion having the sloped portion has an extension portion that extends forward continuously from the sloped portion in front of the sloped portion. Device. The welded portion having the sloped portion is continuous from the sloped portion in front of the sloped portion, and has a rear folded portion that bends inward of the flat plate portion and folds back. 4. The seat support device according to any one of 4.