JP6240752B2 - Vehicle seat slide device - Google Patents

Description

  The present invention relates to a vehicle seat slide device.

  Patent document 1 discloses a vehicle seat slide device to which the present invention relates. The related vehicle seat slide device includes a lower rail, an upper rail, a main roller, a sub roller, and a coil spring. The lower rail is formed in an inverted U-shaped cross section having a bottom wall and a top wall parallel to the bottom wall, and left and right opening edges are bent inward in the opposing direction. The upper rail is provided with main rollers that roll on the bottom wall at both ends in the longitudinal direction, and slidably engages the lower rail and slides along the lower rail. The sub roller is provided in the vicinity of the main roller. The coil spring urges the sub roller upward to contact the top wall, and at this time, the main roller contacts the bottom wall by the reaction force received by the sub roller. The lower rail is supported by the vehicle body. The upper rail supports the seat.

JP-A-8-127270

  Since the lower rail supported by the vehicle body is not limited to the lower side, it is hereinafter referred to as a fixed rail. Moreover, since the upper rail is not limited to the upper side, it is hereinafter referred to as a movable rail. In the related vehicle seat slide device, even if the movable rail is pulled upward due to the primary collision load and the secondary collision load applied to the seat added by the collision of the automobile, the movable rail is removed from the fixed rail. If various locking means are provided between the movable rail and the fixed rail so as not to come off, the cost increases.

  The present invention provides a vehicle seat slide device that enables inexpensively a means for preventing a movable rail from being detached from a fixed rail even when the movable rail is pulled upward by a primary collision load and a secondary collision load on a seat. The purpose is to provide.

A vehicle seat slide device according to an embodiment of the present invention includes a bottom wall, a top wall having an opening and parallel to the bottom wall, a U-shaped fixed rail, and a fixed rail in the fixed rail. A part of the rail is disposed, and the movable rail is slidable in the front-rear direction along the fixed rail. The movable rail includes an upper support portion capable of fixing a seat, a lower flange portion disposed in the fixed rail, and a T-shaped portion having a reverse T-shaped cross section, and the T-shaped portion. A block-shaped main body connected to and formed on the lower side of the T-shaped portion , a first shaft that is pivotally supported by a pin of the main body, contacts the bottom wall, and rolls the bottom wall by the movement of the movable rail. A roller, and a second roller that is pivotally supported by a bracket supported by the main body and presses the top wall so as to allow rolling . The main body is formed integrally with a pillar portion formed in an extension portion below the support portion.

A vehicle seat slide device according to an embodiment of the present invention includes a bottom wall, a top wall having an opening and parallel to the bottom wall, a U-shaped fixed rail, and a fixed rail in the fixed rail. A part of the rail is disposed, and the movable rail is slidable in the front-rear direction along the fixed rail. The movable rail includes an upper support portion capable of fixing a seat, a lower flange portion disposed in the fixed rail, a T-shaped portion having a reverse T-shaped cross section, and the T-shaped portion. And a block-shaped main body formed on the lower side of the T-shaped portion, and a first shaft that is pivotally supported by a pin of the main body, contacts the bottom wall, and rolls the bottom wall by the movement of the movable rail. A roller, a second roller that is pivotally supported by a bracket supported by the main body, and press-contacts the top wall so as to be able to roll, and is provided at an upper end portion of the support portion. And an attachment portion formed with a female screw capable of fastening the seat.

  The vehicle seat slide device may further include a built-up portion formed on the lower side of the main body and raised upward.

  The left and right side portions of the main body may have a flat portion parallel to the inner surface of the fixed rail.

  The left and right side portions may have protrusions that protrude downward from the build-up portion.

  According to the said structure, a movable rail is provided with the T-shaped part and the main body, and the main body is integrally formed with the pillar part formed in the extension part of the lower side of a support part. Thereby, even if a primary collision load and a secondary collision load are applied to the seat and the movable rail having a support portion to which the seat is fixed is pulled upward, the movable rail can be prevented from being detached from the fixed rail. Therefore, a means for preventing the movable rail from being detached from the fixed rail can be provided at low cost.

FIG. 1 is a perspective view of a vehicle seat according to an embodiment of the present invention. FIG. 2 is a perspective view of the vehicle seat of FIG. 1 as viewed from an obliquely rear side. FIG. 3 is an enlarged cross-sectional view of a movable rail constituting the vehicle seat slide device of FIGS. 1 and 2 and a fixed rail incorporating the movable rail. FIG. 4 is a perspective view showing only the movable rail of FIGS. 1 to 3.

  Provided is a vehicle seat slide device that enables inexpensively a means for preventing a movable rail from being detached from a fixed rail even when the movable rail is pulled upward due to a primary collision load and a secondary collision load on the seat. The purpose was achieved by the following configuration. That is, a vehicle seat slide device includes a fixed rail having a bottom wall and an opening and a top wall parallel to the bottom wall and having a U-shaped section, and a part of the fixed rail is disposed in the fixed rail. A movable rail slidable in the front-rear direction along the fixed rail. The movable rail has an upper support portion capable of fixing a seat and a lower flange portion disposed in the fixed rail, and has a T-shaped portion having an inverted T-shaped cross section, and the T-shaped portion. And a block-shaped main body formed under the T-shaped portion. The main body is formed integrally with a pillar portion formed in an extension portion below the support portion. Alternatively, the movable rail includes an attachment portion provided at an upper end portion of the support portion and formed with a female screw capable of fastening the seat from the front-rear direction of the support portion.

  Hereinafter, a vehicle seat slide apparatus 1 according to an embodiment of the present invention will be described in detail with reference to FIGS. The vehicle seat slide device 1 according to the present embodiment will be described as being mounted on an automobile, but is not limited to this, and may be mounted on an airplane, a ship, a railway vehicle, or the like. The vehicle seat slide device 1 includes a fixed rail 2, a movable rail 3, main rollers 5 and 5, and a sub roller 8.

  The fixed rail 2 is formed in a substantially U-shaped cross section, and is bent inward from the bottom walls 6 and 6, the side walls 2 c and 2 c erected upward from the bottom walls 6 and 6, and the tops of the side walls 2 c and 2 c. The bottom walls 6 and 6 have top walls 4 and 4 extending substantially parallel to each other and facing each other. At the free ends of the top walls 4, 4, opening edges 2 a, 2 a are formed that define a gap (opening) through which a support part 3 d described later of the movable rail 3 can pass.

  The movable rail 3 is partially disposed in the fixed rail 2 and is movable (slidable) along the fixed rail 2 in the front-rear FR / RR direction (the longitudinal direction of the fixed rail 2 and the movable rail 3). The movable rail 3 has a T-shaped portion 3a having a T-shaped cross section with the lower flange portion 3c positioned in the fixed rail 2, and a block-shaped main body formed below the T-shaped portion 3a. 3b. The T-shaped portion 3a and the main body 3b are integrally formed by extrusion. The fixed portion 16a of the seat portion 16 of the seat 15 is coupled and supported by a flat plate-like support portion 3d that extends upward at the left and right center of the flange portion 3c of the T-shaped portion 3a.

  The main rail 3b, the flange 3c, and the lower LWR portion of the movable rail 3 are disposed in the fixed rail 2. The lower LWR portion of the support portion 3d is slidable along the fixed rail 2 in the opening edges 2a and 2a of the fixed rail 2 to the front side FR and the rear side RR. The main body 3b is formed integrally with a pillar portion 3e formed at an extension position (extension portion) of the lower LWR of the support portion 3d. On the left and right (short side direction of the movable rail 3) side surfaces of the column portion 3e, the lightening portions 3k and 3k for weight reduction are formed.

  The upper end of the support portion 3d of the movable rail 3 is fastened in the front-rear direction, that is, from the front FR and the rear RR to the front bracket 16b and the rear bracket 16c of the fixing portion 16a of the seat portion 16 of the seat 15. The attachment part 3h in which the internal thread 3i that can be fastened by 16d was formed was formed. A backrest 17 is provided on the rear side RR of the seat 16.

  On the lower LWR of the column portion 3e of the movable rail 3, a built-up portion 3f that rises toward the lower LWR is formed. Planar portions 3j and 3j formed in parallel with the inner surface 2b of the fixed rail 2 are formed on the left and right side portions of the column portion 3e. On the lower LWR of the flat portions 3j and 3j, projections 3n and 3n are formed that protrude from the build-up portion 3f to the lower LWR.

  The main rollers 5 and 5 are rotatably supported at both ends in the longitudinal direction of the movable rail 3, that is, at the front FR and rear RR ends of the movable rail 3. More specifically, the main rollers 5 and 5 are incorporated into the end portions of the front side FR and the rear side RR of the movable rail 3 from both the left and right sides, and through through holes (not shown) formed in the main body 3 b of the movable rail 3. It is rotatably supported with respect to the movable rail 3 via a press-fitted pin (not shown). As shown in FIG. 3, the main rollers 5 and 5 are in contact with the bottom walls 6 and 6 formed on the fixed rail 2, and roll on the bottom walls 6 and 6 by the movement of the movable rail 3.

  The brackets 7 and 7 are formed in a U-shaped cross section with the opening facing the upper side UP. As shown in FIG. 3, the brackets 7 and 7 are independent on the left and right (short direction of the movable rail 3). Further, one of the brackets 7 and 7 is formed so that the vertical dimension is larger than the other (not shown). As shown in FIG. 3, one 7a, 7a is arrange | positioned at the edge part side of a left-right cross section, and the other (illustration omitted) is arrange | positioned at the center side of the left-right cross section. A pin (not shown) is press-fitted into a through hole (not shown) formed in the main body 3b of the movable rail 3 and a through hole (not shown) formed in one 7a and the other (not shown) of the bracket 7. Brackets 7 are supported on the main body 3 b of the movable rail 3. With such a configuration, both brackets 7 and 7 are pivotally supported with respect to the movable rail 3 so as to be rotatable up and down.

  One end (not shown) of the brackets 7 and 7 is provided with a lever (not shown) extending upward (bowed in the lower LWR) (not shown). This lever (not shown) is always pressed against the lower LWR by a damper (not shown) attached to the main body 3b of the movable rail 3. That is, the damper (not shown) always gives the brackets 7 and 7 a rotational urging force centered on the pin (not shown).

  The auxiliary roller 8 is pivotally supported by the brackets 7 and 7 so as to be vertically rotatable via a shaft portion 8a that is pivotally supported by a through hole (not shown) formed in the other end portion (not shown) of the brackets 7 and 7. , And can roll on the top walls 4 and 4 of the fixed rail 2. The sub-roller 8 is always in pressure contact with the top wall 4 by constantly urging one end (not shown) of the brackets 7 and 7 by a damper (not shown). Escape portions 3g and 3g are formed in the main body 3b of the movable rail 3 so as to escape the sub-roller 8.

  The slide lock device 12 is engaged with and disengaged from a lock hole (not shown) of the fixed rail 2 by a shaft 12e pivotally supported by the movable rail 3, an operation lever 12a supported horizontally by the shaft 12e, and the operation lever 12a. A lock portion 12c that is moved and a coil spring 12b that is engaged and supported by the support portion 3d so as to urge the lock portion 12c in the engagement direction.

  Due to sudden braking applied to the automobile, a primary collision load and / or a secondary collision load is applied to the seat 15, and the movable rail 3 having the support portion 3d to which the seat 15 is fixed may be pulled upward. . Even in such a case, the movable rail 3 includes the T-shaped portion 3a and the main body 3b, and the main body 3b is integrally formed with the column portion 3e formed at the extended position of the lower LWR of the support portion 3d. Therefore, the movable rail 3 can be prevented from being detached from the fixed rail 2. Therefore, according to this embodiment, a means for preventing the movable rail 3 from being detached from the fixed rail 2 can be provided at low cost.

  According to the present embodiment, the brackets 7 and 7 are further provided with levers (not shown) provided at both ends of the movable rail 3 in the left and right sides independently of each other in the longitudinal direction. The brackets 7 and 7 are independent on the left and right. For this reason, by being able to follow the deformation and displacement of the fixed rail 2 and the movable rail 3, the movable rail 3 engaged with the fixed rail 2 can slide smoothly.

  According to the present embodiment, the damper (not shown) presses the lever (not shown), respectively, so that one end (not shown) of the brackets 7 and 7 is always urged to rotate. Therefore, the auxiliary rollers 8 and 8 pivotally supported by the brackets 7 and 7 are always in pressure contact with the top wall 4 of the fixed rail 2. At the same time, the main rollers 5 and 5 attached to the movable rail 3 are in contact with the bottom wall 6 of the fixed rail 2. For this reason, there is no gap between the auxiliary rollers 8 and 8 and the top wall 4 of the fixed rail 2, and noise is hardly generated. Therefore, the vehicle seat slide device 1 does not generate or hardly generates noise even when it receives vibration generated as the vehicle travels.

  Since the auxiliary roller 8 is pre-assembled to the bracket 7, the number of assembly steps in the assembly line such as the fixed rail 2 can be reduced. For this reason, the assembly work process of various members is simplified.

  Although the embodiments have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made.

Claims (6)

A fixed wall having a bottom wall, a top wall having an opening and parallel to the bottom wall, and having a U-shaped cross section;
A movable rail that is partially disposed in the fixed rail and is slidable in the front-rear direction along the fixed rail;
With
The movable rail is
An upper support portion capable of fixing the seat, and a lower flange portion disposed in the fixed rail, and a T-shaped portion having a reverse T-shaped cross section;
A block-shaped main body connected to the T-shaped portion and formed below the T-shaped portion;
A first roller that is pivotally supported by the pin of the main body and that is in contact with the bottom wall and rolls on the bottom wall by movement of the movable rail;
A second roller that is pivotally supported by a bracket supported by the main body and presses the top wall so that it can roll;
Have
The vehicle seat slide device, wherein the main body is integrally formed with a pillar portion formed in an extension portion below the support portion. A fixed wall having a bottom wall, a top wall having an opening and parallel to the bottom wall, and having a U-shaped cross section;
A movable rail that is partially disposed in the fixed rail and is slidable in the front-rear direction along the fixed rail;
With
The movable rail is
An upper support portion capable of fixing the seat, and a lower flange portion disposed in the fixed rail, and a T-shaped portion having a reverse T-shaped cross section;
A block-shaped main body connected to the T-shaped portion and formed below the T-shaped portion;
A first roller that is pivotally supported by the pin of the main body and that is in contact with the bottom wall and rolls on the bottom wall by movement of the movable rail;
A second roller that is pivotally supported by a bracket supported by the main body and presses the top wall so that it can roll;
An attachment portion provided at an upper end portion of the support portion and formed with a female screw capable of fastening the seat from the front-rear direction of the support portion;
A vehicle seat slide device. 3. The vehicle seat slide device according to claim 1, wherein an escape portion is formed in the main body so as to escape the second roller. The vehicle seat slide device according to any one of claims 1 to 3, further comprising a built-up portion formed on the lower side of the main body and raised toward the lower side. The vehicle seat slide device according to any one of claims 1 to 4 , wherein left and right side portions of the main body have flat portions parallel to an inner surface of the fixed rail. Further comprising a built-up portion formed on the lower side of the main body and raised toward the lower side;
The left and right side portions of the main body have a flat portion parallel to the inner surface of the fixed rail,
The vehicle seat slide device according to any one of claims 1 to 3, wherein the left and right side portions have protrusions that protrude downward from the build-up portion.

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