JPH10203211A - Slide rail device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the increase of a cost through reduction of size in the direction of the width of a vehicle and suppression of the number of parts. SOLUTION: A slide rail device 1 comprises a slide rail part 40; a lock mechanism 41; a walk-in mechanism 42; and a slide regulation mechanism 43. The slide rail part 40 comprises a lower rail member 2; and an upper rail member 3 on the seat cushion side. The walk-in mechanism 42 comprises a cover member 64 arranged along the longitudinal direction of the lower rail member 2; and a tension spring 65. An opening part formed along the longitudinal direction thereof is formed in the cover member 64. The slide regulation mechanism 43 comprises a bracket member 72; and a tension spring 73. The tip part 81 of the bracket member 72 is retractably loosely inserted in an opening part, and when the seat is slid to a given position in front, the set is brought into contact with the opening end part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide rail device used for a seat movable in the front-rear direction such as a rear seat of a vehicle.

[0002]

2. Description of the Related Art The second row of vehicles such as one-box cars,
The seats used for the rear seats in the rows and the like are used for various purposes such as leisure and luggage transportation.
It is desired to be able to move in the front-rear direction of the vehicle b like a rear seat a illustrated in FIG.

[0003] In addition, in the case of transporting luggage, in order to load more luggage, the cushion c is rotated forward with one end as a fulcrum as shown by a two-dot chain line in the figure. There is known an apparatus that expands a luggage compartment d by sliding the seat b fully forward as well as folding it.

A seat provided in a passenger compartment having a rear seat such as a second and third row, such as a one-box car, has a large amount of sliding in the front-rear direction, thereby facilitating the operation of moving the seat in the front-rear direction. Therefore, it is desired to use a walk-in mechanism conventionally used for a passenger car or the like.

[0005] This walk-in mechanism is described in
As shown in Japanese Patent No. 9733, when an occupant or the like operates a reclining device and tilts a seat back portion forward, a lock of a slide rail device is released and a vehicle seat is automatically moved forward or backward. It is a mechanism.

[0006] In addition, since the passenger compartment of a one-box car or the like is generally larger than the passenger compartment of a passenger car, the distance in which the rear seats in the second and third rows slide tends to be longer. For this reason, the seat belt device used for the seats in the second and third rows is required to properly restrain the occupant seated in the seat when the seat is fully moved to the front or the rear of the passenger compartment. Special consideration is needed.

That is, a slide rail device mounted on a vehicle having an extremely large amount of sliding in the front-rear direction is provided only in a range in which the seat belt device can appropriately restrain the occupant when the occupant is seated. It must be movable. Also, in order to enlarge the luggage compartment and load more luggage, if the seat belt device moves to the extent that the occupant cannot be restrained properly by moving the seat all the way forward or backward, the occupant will be seated on the seat. It must be changed to a state that cannot be performed.

[0008] Therefore, there is known a slide rail device 101 as shown in FIG. 7, for example, which regulates the slide of a sheet. This slide rail device 1
01 restricts the sliding movement of the seat only within a range where the seat belt device can appropriately restrain the occupant in a state where the occupant can sit on the seat. The seat has a function of releasing the regulation of the slide movement only when the front end side is rotated upward with the rear end side of the cushion portion as a fulcrum so that the seat cannot be seated by the occupant.

A conventional slide rail device 101 exemplified in FIG. 7 is provided on the lower surface side of a seat cushion portion in a pair on the left and right sides, and includes a slide rail portion 102, a lock mechanism (not shown), a walk-in mechanism 103, respectively. A slide regulating mechanism 104 and the like are provided.

The slide rail portion 102 includes a lower rail member 105 fixed to the vehicle body, an upper rail member 106 and a roller member 107 fixed to the lower surface of the seat cushion.

The lower rail member 105 has a flat bottom 108 attached to the floor of a vehicle body and a pair of bottoms 108 formed by being raised from both left and right sides of the bottom 108 and bent inwardly into a hook shape. Inward edge 109, 1
09.

The upper rail member 106 is composed of two metal plates 112 and 113 in which vertical portions 110 and 111 extending along the vehicle vertical direction are fixed to each other. The metal plates 112 and 113 include the vertical portions 110 and 111, flat portions 114 and 115 bent outward from lower ends of the vertical portions 110 and 111, and flat portions 114 and 115.
Edges 116 and 117 bent upward from the upper part are integrally provided.

The upper rail member 106 integrally has a spring hook 118 for locking a tension spring 121 of the walk-in mechanism 103 which will be described later. The roller member 107 is rotatably supported from left and right by plate members 119 and 120. The plate member 11
9, 120, the roller member 107 is attached to the inward edge portion 10;
9 and 109, and is fixed to the upper rail member 106 by bolts or the like.

The lock mechanism includes the lower rail member 1.
05 and the upper rail member 106 are kept in a locked state fixed to each other, and also has a function of releasing the lock between the lower rail member 105 and the upper rail member 106 by operating the operation lever of the reclining device.

The walk-in mechanism 103 is provided on the left side of the slide rail 102 in the illustrated example, and includes a tension spring 121 and a cover member 122. One end of the tension spring 121 is locked to the spring hook 118 of the upper rail member 106 and the other end is locked to the tip of the cover member 122, etc., so as to constantly urge the upper rail member 106 forward. I have.

The cover member 122 has a U-shaped cross section, and has one end fixed to the lower rail member 105 so as to surround the tension spring 121, and is provided along the longitudinal direction of the lower rail member 105. ing.

The walk-in mechanism 103 is configured such that when the seat back portion is pivoted forward about the lower end,
It has a function of shifting the lock mechanism to an unlocked state. Therefore, when the lock mechanism is in the unlocked state, the walk-in mechanism 103 automatically moves the seat together with the upper rail member 106 forward by the elastic restoring force of the tension spring 121.

The slide regulating mechanism 104 is provided on the right side of the slide rail portion 102 in the illustrated example, and includes a bracket member 123 rotatably connected to the upper rail member 106, and a slide regulating cover member 124.
And

The slide regulating cover member 124 is fixed to the bottom surface 108 of the lower rail member 105 and extends in the vehicle width direction of the vehicle.
And a vertical portion 126 bent upward from the end of the cover member 124 and an edge portion 127 bent inside the cover member 124 from the vertical portion 126.

The bracket member 123 is always downwardly moved by a biasing means (not shown) in a state where the tip 128 located at the lower end is loosely inserted between the lower rail member 105 and the edge 127 of the slide regulating cover member 124. Has been energized. The upper portion of the bracket member 123 has a concave portion or the like that engages with a convex portion or the like provided on the member on the seat cushion side.

The slide regulating cover member 124 has a bent portion 129 which contacts the leading end portion 128 in order to regulate the slide of the sheet at a desired position. The bent portion 129 is provided at the front end of the stroke in a range where the seat belt device can appropriately restrain the occupant in the sliding area of the seat of the slide regulating cover member 124.

By configuring the slide restricting mechanism 104 in this manner, when the occupant can sit on the seat, the convex portion provided on the seat cushion side engages with the concave portion of the bracket member 124 so that the bracket member 124 is engaged. 123 is fixed and the bracket member 12
The front end 128 of the third member comes into contact with the bent portion 129 or the like, so that the amount of sliding of the seat in the front-rear direction is restricted to a range where the seat belt device can appropriately restrain the occupant.

When the convex portion of the cushion portion is removed from the concave portion of the bracket member 123 by rotating the seat cushion portion upward, the bracket member 123 becomes rotatable. Bending part 1
When abutting against the bent portion 29, the bracket member 123 can rotate in a direction in which the distal end portion 128 runs over the bent portion 129. As a result, the sliding of the seat in the front-rear direction is not restricted, and the seat can be slid in the front-rear direction.

[0024]

In the above-described conventional slide rail device 101, the walk-in mechanism 103 and the slide regulating mechanism 104 are provided on both left and right sides of the slide rail portion 102 along the longitudinal direction. It tends to be wider in the direction.

For this reason, the slits and the like of the carpet to be stuck on the floor of the cabin become wide, and the aesthetic appearance is impaired such that the slide rail device 101 is exposed from the gap. In addition, since the walk-in mechanism 103 and the slide regulating mechanism 104 are provided on both left and right sides of the slide rail section 102, the number of parts increases, which causes an increase in cost and an increase in weight.

Accordingly, an object of the present invention is to provide a slide rail device which suppresses the width in the vehicle width direction of the entire device including a walk-in mechanism and the like, and also suppresses a rise in cost by suppressing the number of parts. .

[0027]

In order to solve the above-mentioned problems and to achieve the object, a slide rail device according to the present invention is characterized in that a seat cushion is rotatable around one end and the other end upward. And a pair of a vehicle seat having a lower rail member fixed to the vehicle body and supporting the upper rail member slidably in the front-rear direction of the vehicle and an upper rail member attached to a lower portion of the seat cushion portion. A slide rail portion, a lock mechanism provided on at least one slide rail portion of the pair of slide rail portions and capable of fixing the upper rail member to a desired position in the front-rear direction with respect to the lower rail member, and locking the lock mechanism. The vehicle seat is switchable between an unlocked state and an unlocked state, and in the unlocked state. A slide rail device having a walk-in mechanism having a spring biasing forward of the vehicle, wherein an opening formed along a front-rear direction of the vehicle in a cover member of the walk-in mechanism attached to the slide rail portion. And a bracket member provided on the member on the seat cushion side so as to be freely inserted into and removed from the opening portion, and the seat cushion portion is turned upward from a first state in which a tip portion of the bracket member is loosely inserted into the opening portion. A slide regulating mechanism that shifts to a second state in which the distal end of the bracket member is pulled out of the opening in the moved state,
In the first state, the front end of the bracket member is in contact with the opening end of the opening located in the front-rear direction of the vehicle to regulate the sliding movement of the vehicle seat.

According to a second aspect of the present invention, in the slide rail device according to the first aspect, the slide regulating mechanism biases the bracket member from the second state to the first state. It is characterized by having an urging means which performs the operation.

According to a third aspect of the present invention, in the slide rail device according to the first aspect, the slide restricting mechanism includes a state in which the seat cushion portion is not rotated upward, that is, an occupant is disengaged. In the seatable state, the bracket member is kept in the first state to restrict the sliding movement of the vehicle seat, and the seat cushion portion is rotated upward about one end, that is, the occupant cannot sit. Only in the state, the bracket member can be switched from the first state to the second state to allow the vehicle seat to slide.

As a result of taking the above-described measures, the following operation occurs. The slide rail device according to claim 1,
An opening through which the tip end of the bracket member that regulates the sliding movement of the vehicle seat is inserted and withdrawn is provided in the cover member of the walk-in mechanism, so that a dedicated member that regulates the sliding is provided along the longitudinal direction to the side such as the lower rail member. There is no need to provide them.

In the slide rail device according to the second aspect, since the slide regulating mechanism has the urging means for constantly urging the bracket member from the second state to the first state, the vehicle seat is mounted on the bracket member. When the front end of the bracket member moves from the state where it is pulled out of the opening to the range where the slide is restricted, the state automatically shifts to the first state where the front end of the bracket member is loosely inserted into the opening.

In the slide rail device according to the third aspect, the slide regulating mechanism keeps the bracket member in the first state only when the occupant can sit on the vehicle seat, and when the occupant cannot sit on the vehicle seat. Since the bracket member can be freely shifted to the second state, the slide amount is restricted by the stroke in which the seat belt effectively functions.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. Similar to the conventional example (shown in FIGS. 7 and 8), the slide rail device 1 restricts the sliding movement of the seat only within a range where the seat belt device can appropriately restrain the occupant when the occupant can sit on the seat. I do. Then, when the seat cushion cannot be seated by the occupant by rotating the other end of the seat upward with the cushion portion c of the seat as a fulcrum, the slide movement restriction is released.

The slide rail device 1 is a reclining device r for reclining the seat back portion e.
And a seat cushion portion c having a rear end side (one end) as a fulcrum and a front end side (other end) rotatable upward.

As shown in FIGS. 1 and 2, the slide rail device 1 is provided in a pair on the left and right sides on the lower surface side of the seat cushion portion, and respectively has a slide rail portion 40, a lock mechanism 41, a walk-in mechanism 42, and a slide restriction. Mechanism 4
3 and so on.

The slide rail section 40 includes a lower rail member 2, an upper rail member 3, a roller member 4, and the like. As shown in FIGS. 3 and 4, the lower rail member 2 is obtained by, for example, bending a single thick metal plate or the like. A pair of inward edges 6, 7 formed by being bent in a hook shape with both ends rising from the left and right sides and the upper end facing inward.
And are integrally provided. The inward edges 6 and 7 are formed along the longitudinal direction of the lower rail member 2.

As shown in FIG. 2, a pair of left and right locks penetrating the lower rail member 2 in the vertical direction so that a fitting portion 58 of a lock member 49 of the lock mechanism 41 described later is fitted into the bottom portion 5. A plurality of windows 44 are formed in the longitudinal direction.

As shown in FIGS. 3 and 4, one inward edge portion 6 integrally includes a pair of vertical walls 8, 9 and an upper surface portion 12 provided between the vertical walls 8, 9. I have. The other inward edge portion 7 also integrally includes a pair of vertical walls 10 and 11 and an upper surface portion 13 provided between the vertical walls 10 and 11.

The lower rail member 2 of the inward edge portions 6, 7
A slit portion 14 is formed between the vertical walls 9 and 11 located inside the upper portion of the lower rail member 2 and opens in the longitudinal direction (front-rear direction) above the vehicle body.

The vertical wall 10 is provided with a slit (not shown) for loosely inserting a spring hook 46, which will be described later, provided integrally with the upper rail member 3 into the walk-in mechanism 42.
In the longitudinal direction.

The upper rail member 3 is shown in FIGS.
As shown in FIG. 1, the two thick metal plates 15, 16 and the like are obtained by bending or the like, and are formed by fixing vertical portions 17, 18 described later in parallel with each other. The lower surface side of the seat cushion portion is fixed above the vertical portions 17 and 18.

As shown in FIG. 3, each of the metal plates 15 and 16 constituting the upper rail member 3 is located at the center in the width direction of the upper rail member 3 and provided at a vertical portion 17 provided along the vertical direction of the vehicle. , 18 and this vertical part 17, 1
8, a flat portion 19 bent from the lower end of the member 3 to the outside of the member 3,
20 are integrally provided with edges 21 and 22 bent upward from the ends of the flat portions 19 and 20.

Further, the upper rail member 3 integrally has a spring hook 46 extending to a walk-in mechanism 42 described later at a part of the distal end side. As shown in FIG. 3, the lower rail member 2 and the upper rail member 3 are arranged such that the flat portions 19 and 20 of the upper rail member 3 are passed between the bottom surface portion 5 and the upper surface portions 12 and 13 of the lower rail member 2. The member 3 can move in the longitudinal direction of the lower rail member 2.

That is, plate members 25 and 26 to be described later
The width S of the slit portion 14 of the lower rail member 2 is formed slightly larger than the width P in the left-right direction of the lower rail member 2 and the upper rail member is larger than the inner surface width R between the vertical walls 8 and 10 located outside the lower rail member 2. The interval U between the edge portions 21 and 22 of the third 3 is formed slightly smaller. The above plate member 2
5 and 26 are fixed to the upper rail member 3 with the roller member 4 sandwiched from the left and right.

In order to smooth the movement between the lower rail member 2 and the upper rail member 3 and to suppress the play between the lower rail member 2 and the upper rail member 3, FIG.
As shown in FIG. 4, a low friction member 23 made of fluororesin or the like having a small friction coefficient is provided between the inside of the inward edges 6 and 7 of the lower rail member 2 and the edges 21 and 22 of the upper rail member 3. Is desirable.

Edges 21 and 22 of upper rail member 3
Are formed so that the ends of the low friction member 2 are in contact with the upper surface portions 12 and 13 of the lower rail member 2, respectively.
3 may not be provided.

[0047] The upper rail member 3 is shown in Figs.
As shown in FIG. 3 and the like, a plurality of first notches 24 cut out in a substantially rectangular shape when viewed from the side are provided to enable the roller member 4 to be attached. The upper rail member 3 has a second notch cut out in a substantially rectangular shape along the substantially lock member 49 when viewed from the side so that the lock member 49 of the lock mechanism 41 can be slid vertically in the drawing. It has a part 45.

As shown in FIGS. 1 and 3, the upper rail member 3 is located above the first notch 24 from both the left and right sides.
The pair of plate members 2 sandwich the vertical portions 17 and 18 of
5 and 26 are attached by bolts 27 and nuts 28 or rivets. In the illustrated example,
The plate members 25 and 26 located at the center in the longitudinal direction of the upper rail member 3 are provided with a bolt 27 and a nut 2 so as to also serve as a drive shaft of a connecting member 48 of the lock mechanism 41 which will be described later.
8 or rivets.

As shown in FIG. 4, one (left) plate member 25 integrally includes a shaft portion 29 extending toward the other plate member 26, and the other plate member 26 corresponds to the shaft portion 29. Hole 3 into which the shaft part 29 fits
It has 0. Note that the shaft portion 29 may be a separate component from the plate members 25 and 26 for manufacturing reasons and the like.

The roller member 4 is provided between the plate members 25 and 26. The roller member 4 is supported by the shaft portion 29 and has a slit portion 1 such that a lower portion of a peripheral surface 4 a thereof abuts against a bottom portion 5 of the lower rail member 2.
4 is loosely inserted. The upper part of the roller member 4 protrudes to the height of the slit part 14.

In some cases, the upper part of the roller member 4 can be provided so as to protrude to a position higher than the lower rail member 2. Therefore, the height of the lower rail member 2 does not depend on the outer diameter of the roller member 4, and the height of the lower rail member 2, that is, the height of the vertical walls 8 and 9 can be reduced.

As shown in FIG. 1, the roller member 4 includes an inner race 31, an outer race 32, and a plurality of balls (not shown) made of metal or the like housed between the inner race 31 and the outer race 32.
And a hole 34 with which the shaft portion 29 can be engaged when viewed from the side. The inner ring 31 and the outer ring 32 are provided on a concentric circle centered on the hole 34 as viewed from the side.

As described above, the lower portion of the peripheral surface 4a of the roller member 4 is in contact with the bottom surface 5 of the lower rail member 2, and the roller member 4 is loosely inserted into the slit portion 14.
Since the roller member 4 is fixed to the upper rail member 3 via the plate members 25 and 26, when the upper rail member 3 is moved in the longitudinal direction of the lower rail member 2, the outer ring 32 of the roller member 4 moves in the longitudinal direction of the lower rail member 2. It will roll along. Therefore, the lower rail member 2 and the upper rail member 3 are mutually connected to the lower rail member 2.
Is movable in the longitudinal direction.

At this time, since the spring hook portion 46 provided integrally with the upper rail member 3 is loosely inserted inside the cover member 64 of the walk-in mechanism 42 to be described later through the slit of the lower rail member 3, The sliding between the member 3 and the lower rail member 2 is not hindered.

The lock mechanism 41 is provided with an arrow A shown in FIG.
When viewed from the direction, the rotating member 47, the connecting member 48, and the locking member 4 are provided on the left side of the upper rail member 3.
9.

The rotating member 47 is made of a thick metal plate or the like as shown in FIGS. 1 and 5, and is formed in an L-shape when viewed from the side. One end 47a of the rotating member 47 is rotatably connected to the upper rail member 3 by a bolt 50 and a nut 51. Further, a circular hole 52 is formed in the center of the rotating member 47.

The other end side 47b of the rotating member 47 comes into contact with an operation lever or the like of a reclining mechanism (not shown). When the reclining device is operated in the unlocking direction, as shown in FIG. 5B, the other end 47b is pushed down, and the rotating member 47 is moved along the arrow K direction around the bolt 50 or the like on the one end 47a. It is designed to rotate.

A long hole 53 whose major axis extends substantially in the longitudinal direction of the connecting member 48 is formed at one end 48a of the connecting member 48. A bolt 54 is inserted into the elongated hole 53 and the hole 52 of the rotating member 47, and the nut 55
And the connecting member 48 are rotatably connected to each other.

The connecting member 48 has a circular hole 56 formed substantially at the center thereof. The upper rail member 3 is formed by the bolts 27 and the nuts 28 together with the plate members 25 and 26 located at the longitudinal center of the upper rail member 3.
It is connected to the.

Although the plate members 25 and 26 are fixed to the upper rail member 3, the connecting members 48
Are supported rotatably in the vertical direction. Therefore, the bolt 54 and the like also serve as a drive shaft of the connecting member 48.

As shown in FIG. 1 and the like, the connecting member 48 has a hole 57 formed on the other end 48 b, and is connected to the lock member 49 by a bolt 79. The lock member 49 has a pair of fitting portions 58 that fit into the lock window 44 at the bottom and a hole 62 at the top, and a pair of lock members 49 are provided on the left and right sides of the upper rail member 3.
As shown in FIG. 5, the lock member 49 of the upper rail member 3
A vertically long hole 59 is formed in the mounting portion.

With the pair of lock members 49, 49, the bolt 60 passing through the hole 57 of the connecting member 48 and the elongated hole 59 of the upper rail member 3 is passed through the hole 62 in a state where the upper rail member 3 is sandwiched from right and left. Nut 61 in state
Are fixed to each other. These lock members 4
9 and 49 are integrally slidable up and down along the elongated hole 59 with respect to the upper rail member 3.

The lock member 49 is always urged downward by a leaf spring or the like (not shown), that is, in the direction in which the fitting portion 58 fits into the lock window 44. As shown in FIG. 1, a wire 63, a rod, and the like, which constitute the walk-in mechanism 42, are connected to the upper end of the lock member 49 and the like. Further, the wire 63 also has a function of pulling the lock member 49 upward when the seat cushion portion rotates upward.

The wire 6 of the walk-in mechanism 42
The wire 3 and the wire interlocking with the rotation of the seat cushion portion may be separate parts for the sake of manufacturing or the like.
As described above, by configuring the lock mechanism 41, when the reclining device performs the reclining operation,
Since the operation lever or the like of the reclining device pushes down the other end side 47b of the rotating member 47, an arrow K shown in FIG.
The rotation member 47 is rotated along. In this case, the one end 48a of the connecting member 48 is pushed down, and the connecting member 48 is rotated around the hole 56 in the direction of the arrow L, so that the other end 48b is raised. Will be lifted up along with.

When the operating force of the operating lever of the reclining device is released, the lock member 49 returns to the position shown in FIG.
8 fits into the lock window 44.

The walk-in mechanism 42 includes a cover member 64, a tension spring 65, the wire 63, and the like, as shown in FIGS.
Reference numeral 4 is provided along the longitudinal direction on the right side of the lower rail member 2 when viewed from the direction of arrow A shown in FIG. As shown in FIGS. 3 and 4, the cover member 64 is fixed to the bottom portion 5 of the lower rail member 2 and extends in the vehicle width direction of the vehicle, and is bent upward from an end of the horizontal portion 66. And a cover member 64 from the end of the vertical portion 67.
And an edge 68 bent inward.

An opening 69 is formed between the end 68 a of the edge 68 and the lower rail member 2. As shown in FIG. 2, the opening 69 is provided with a first opening 7 into which a bracket member 72 of the slide regulating mechanism 43 described later can be loosely inserted.
0 and a step 71 (opening end) formed by narrowing the opening width (the distance between the end 68a of the edge 68 and the lower rail member 2) at the front end of the first opening 70. It has integrally.

The open end 71 is connected to the upper rail member 3.
The seat belt device is located at a position where it can come into contact with a later-described distal end portion 81 of the bracket member 72 when the seat belt device is slid forward, and an occupant sitting on the seat by bringing the bracket member 72 into contact with the opening end portion 71. It is provided on the cover member 67 so that it can be appropriately restrained.

The tension spring 65 is used for the upper rail member 3.
The upper rail member 3 is always urged forward by locking one end to a spring hook 46 provided integrally with the upper rail member 3 by locking the other end to the tip of the cover member 64 or the like.

The cover member 64 of the tension spring 65
The position of the upper rail member is determined by the amount of sliding required for the slide rail device 1, the spring constant, the length of the spring when no stress is applied, and the like. It is desirable that the front side 3 can secure the urging force forward even when it is located at the forefront.

One end of the wire 63 is connected to an upper end of a lock member 49 of the lock mechanism 41. The wire 63 is, like a conventionally known walk-in mechanism,
When the seat back portion of the vehicle seat is tilted forward, it has a function of pulling the lock member 49 upward.

When the lock between the lower rail member 2 and the upper rail member 3 is released, the forward sliding of the upper rail member 3 is assisted by the elastic force restoring force of the tension spring 65. Can be easily moved.

When the seat back portion is returned to the rear so that the seat can be seated, the lock member 49 is moved downward by the elastic restoring force of a spring or the like, and the fitting portion 58 is fitted into the lock window 44.

As shown in FIG. 1 and the like, the slide restricting mechanism 43 includes a bracket member 72, a tension spring 73 as an example of an urging means, and a convex portion provided on the lower surface side of the cushion portion and convex downward. 74 and the like. The bracket member 72 is made of a thick sheet metal member or the like. As shown in FIGS. 3 and 4, a pair of parallel portions 75 and 76 formed substantially parallel to each other and flat when viewed from the front, and the parallel portion 7
5 and 76 and a horizontal portion 77 provided between them.

As shown in FIG.
Has an engaging portion 78 formed in the horizontal portion 77 so as to be concave on the vehicle lower side and formed in the vehicle width direction. As shown in FIGS. 1, 3 and 4, etc., one parallel portion 75 of the bracket member 72 is provided.
Is rotatably supported in the front-rear direction by bolts 79 and nuts 80.

The distal end portion 81 located below the bracket member 72 is in a state in which the convex portion 74 is engaged with the engaging portion 78 as shown in FIGS.
1 is formed so as to be loosely inserted into the opening 69 of the cover member 64 of the walk-in mechanism 42 in the upright state.

As shown in FIG. 1, one end 73a of the tension spring 73 is engaged with a part of the bracket member 72, and the other end 73b is engaged with a spring hook 82 formed integrally with the upper rail member 3. By being stopped, the bracket member 72 is always urged in a direction in which the distal end portion 81 stands up (a direction in which the distal end portion 81 is loosely inserted into the opening 69).

In the state where the occupant can sit on the seat cushion, that is, when the seat back is erected at a predetermined position, the projection 74 engages with the engaging part 78 and the front end part 81 has the opening 69. Has a function of keeping the bracket member 72 in the first state in which the bracket member 72 is loosely inserted. When the seat cushion portion is rotated upward, the convex portion 74 can be removed from the engaging portion 78 and the bracket member 72 can be shifted to the second state in which the distal end portion 81 is removed from the opening 69. Has a function that can be.

Next, the operation of the slide rail device 1 having the above configuration will be described with reference to FIG. 1 and FIGS. First, in a state where the seat back portion is raised so that an occupant can sit on the seat cushion portion, as shown in FIG. 1, the convex portion 74 provided on the lower surface of the seat cushion portion is engaged with the engaging portion of the bracket member 72. 78 is engaged.

At this time, as shown in FIG. 5 (A), the fitting portion 58 of the lock member 49 fits into the lock window 44 of the lower rail member 2 to slide the upper rail member 3 and the lower rail member 2 together. Is kept in a locked state.

When the seat back portion is tilted forward when an occupant gets on or off, the wire 63 or the like connected to the seat back portion pulls the lock member 49 upward. As shown in FIG. 5B, the lock member 49 is
The fitting portion 58 is removed from the lock window 44 by moving in the direction of arrow J along 9.

Then, the lock between the lower rail member 2 and the upper rail member 3 is released, and the upper rail member 3 is slid forward by the elastic force restoring force of the tension spring 65 of the walk-in mechanism 42. As a result, the vehicle seat can be easily moved.

When the operator moves the vehicle seat to a desired position and then returns the seat back portion to a state where the seat back portion can be seated by returning the seat back portion to the rear, the lock member 49 is moved to the position shown in FIG. Returning to the position shown in FIG.
Will fit into the lock window 44.

During these operations, the convex portion 74 provided on the seat cushion portion engages with the engaging portion 78 of the bracket member 72.
Is kept in a state of being engaged with the. Therefore, even if the upper rail member 3 is slid forward by the tension spring 65, the bracket member 72 is held in the first state in which the front end portion 81 contacts the opening end 71 of the opening 69. Therefore, the sliding of the vehicle seat is restricted within a range in which the seat belt device can appropriately restrain the occupant.

Next, when the seat cushion portion is rotated upward to widen the luggage compartment, the projection 74 on the seat cushion side is engaged with the engagement portion 78 as shown in FIG. As shown in FIG. 6B, the convex portion 74 on the seat cushion side comes out of the engaging portion 78.

At the same time, the wire 63 connected to the seat cushion portion pulls the lock member 49 upward, and as shown in FIG. The fitting portion 58 is pulled out of the lock window 44 in the direction.

Then, the lock between the lower rail member 2 and the upper rail member 3 is released, and the upper rail member 3 can slide forward. When the vehicle seat is moved forward by the elastic restoring force of the tension spring 65 of the walk-in mechanism 42, FIG.
As shown in (B), the distal end portion 81 of the bracket member 72
Abuts on the open end 71 of the cover member 64.

At this time, when the operator applies a force to the vehicle seat that exceeds the elastic restoring force of the tension spring 73 of the slide restricting mechanism 43 in the forward direction (in the direction of arrow C in the drawing), FIG.
As shown in (C), the bracket member 72 rotates in the direction of arrow B about the bolt 79, the tip portion 81 comes off the opening 69, and the bracket member 72 is shifted to the second state. Therefore, the upper rail member 3 can be moved further forward than the opening end 71, and the vehicle seat can be further moved forward.

When the vehicle seat is moved rearward from the second state shown in FIG.
Of the bracket member 7 by the elastic restoring force of the tension spring 73 when the front end 81 of the
2 rotates in the direction of arrow D shown in FIG. For this reason, when the seat is returned to the rear, as shown in FIG. 6B, the front end portion 81 of the bracket member 72 smoothly transitions to the first state in which it is loosely inserted into the opening 69.

[0090]

According to the first aspect of the present invention, the opening through which the bracket member for regulating the sliding amount of the vehicle seat is inserted and the opening end as the stopper for stopping the bracket member at a desired position are walked. Since it is provided on the cover member of the in-mechanism, it is not necessary to provide a dedicated member for restricting the sliding of the seat along the longitudinal direction on the side such as the lower rail member.

Therefore, the width of the slide rail device in the vehicle width direction can be small, and the number of parts can be suppressed, so that the cost can be prevented from rising, and the weight can be reduced. According to the second aspect of the present invention, in addition to the effect of the first aspect, the slide regulating mechanism has the urging means for constantly urging the bracket member from the second state to the first state. When the sheet is returned from the state in which the front end of the bracket member is pulled out of the opening to the range that regulates the sliding amount, the first end of the bracket member is loosely inserted into the opening.
It will transition to the state smoothly. Therefore, the state in which the sliding amount of the vehicle seat is regulated and the state in which the sliding amount is not regulated can be reliably switched.

According to the third aspect of the present invention, in addition to the effect of the first aspect of the present invention, the slide restricting mechanism keeps the bracket member in the first state when the occupant can sit on the seat,
The bracket member can be shifted to the second state only when the occupant cannot sit down. Therefore, when the occupant can sit on the seat, the seat can be slid only within a range where the seat belt device can appropriately restrain the occupant.

[Brief description of the drawings]

FIG. 1 is a side view of a slide rail device according to an embodiment of the present invention.

FIG. 2 is a plan view of the slide rail device shown in FIG.

FIG. 3 is a sectional view taken along the line iii-iii shown in FIG. 1;

FIG. 4 is a sectional view taken along the line iv-iv shown in FIG. 1;

FIG. 5 is a sectional view showing an operation state of the lock mechanism along a line vv shown in FIG. 2;

FIG. 6 is a diagram showing an operation state of a slide regulating mechanism of the slide rail device shown in FIG. 1;

FIG. 7 is a sectional view showing a conventional slide rail device.

FIG. 8 is a schematic view showing a rear seat of a conventional one-box car.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Slide rail apparatus 2 ... Lower rail member 3 ... Upper rail member 40 ... Slide rail part 41 ... Lock mechanism 42 ... Walk-in mechanism 43 ... Slide regulation mechanism 47 ... Rotating member 48 ... Connecting member 49 ... Lock member 64 ... Cover member 65 ... Tension spring 69 ... Opening 71 ... Open end 72 ... Bracket member 73 ... Tension spring (biasing means) 74 ... Protrusion 81 ... Tip

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akio Shimizu 4-2-1-1, Shimomaruko, Ota-ku, Tokyo Inside Mitsubishi Automotive Engineering Co., Ltd. (72) Inventor Yoshinobu Taki 4-2-1-1, Shimomaruko, Ota-ku, Tokyo Mitsubishi Inside Automotive Engineering Co., Ltd. (72) Inventor Shingo Mazume 4-2-1-1, Shimomaruko, Ota-ku, Tokyo Mitsubishi Automotive Engineering Co., Ltd.

Claims (3)

[Claims] 1. A vehicle seat having a seat cushion portion rotatable about one end thereof and the other end thereof upward, an upper rail member attached to a lower portion of the seat cushion portion, and the upper rail member in a longitudinal direction of the vehicle. A pair of slide rail portions that are slidably supported and have a lower rail member fixed to the vehicle body; and the lower rail member is provided on at least one of the pair of slide rail portions and the upper rail member. A lock mechanism that can be fixed to a desired position in the front-rear direction, and a spring that can switch the lock mechanism between a locked state and an unlocked state and urges the vehicle seat forward of the vehicle in the unlocked state. A slide rail device having a walk-in mechanism having An opening formed along the front-rear direction of the vehicle in a cover member of the walk-in mechanism provided along with a rail portion; a bracket member provided on the member on the seat cushion side so as to be able to be inserted into and removed from the opening portion; From the first state in which the distal end of the bracket member is loosely inserted into the opening, a transition is made to a second state in which the distal end of the bracket member is pulled out of the opening when the seat cushion is rotated upward. A slide restricting mechanism, wherein in the first state, the front end of the bracket member contacts an opening end of the opening located in the vehicle front-rear direction to restrict the sliding movement of the vehicle seat. And slide rail device. 2. The slide rail device according to claim 1, wherein said slide regulating mechanism has an urging means for urging said bracket member from said second state to said first state. 3. The slide regulating mechanism maintains the bracket member in the first state when the seat cushion is not rotated upward, and causes the seat cushion to move upward about one end. 2. The bracket member can be switched from the first state to the second state only in a rotated state.
The slide rail device as described.