JP3385144B2 - Jumping seat lock device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device for a van, a second seat and a third seat to be mounted on an automobile called a one-box car, and more specifically, an elongated lower rail extending in the front-rear direction and a lower rail for the lower rail. A seat cushion is attached to a slide rail for adjusting the front-rear position of the seat, which is composed of an upper rail that is slidably fitted, and a seat back is tiltably attached by a reclining device. Regarding the device.

[0002]

2. Description of the Related Art In a conventional second seat, for example, a long lower rail (long lower rail) is fixedly installed on the vehicle floor between the vicinity of the front end of the front seat and the vicinity of the front end of the third seat. After moving to the vicinity of the front seat and the third seat, the seat cushion is jumped up in the upright seatback direction to widen the front-rear space between the second seat and the front seat, or between the second seat and the third seat. , There is one that allows the space to be effectively used as a loading platform.

By the way, the jumping of the seat cushion in the second seat is restricted so that it can be performed only when the seat cushion moves forward or backward beyond a predetermined position on the long lower rail. The restricting means has a structure in which another sub-rail is provided along the long lower rail, the sub-rail, an upper rail corresponding to the sub-rail, and a device for restricting the jumping up on the seat cushion side.

[0004]

Therefore, in the conventional product, the seat cushion is prevented from jumping up to the sub-rail different from the long lower rail provided along the long lower rail, the upper rail and the seat cushion corresponding to the sub-rail. Since the lock device is provided, there is a problem that the structure is complicated, the slide rail itself is large, and the weight is increased.

Therefore, it is an object of the present invention to make a locking device compact in which the seat cushion can be kept in the raised state and the seat back can be prevented from being tilted backward when the raised seat is in the raised state.

[0006]

In order to achieve the above object, the lock device for a flip-up seat according to the present invention is configured so that an upper rail is slidably fitted in a long lower rail on a vehicle floor side in a longitudinal direction. A side bracket is integrally fastened to the rail, a seat cushion is pivotally mounted between the left and right side brackets by a rotating shaft so as to be able to jump up in the seatback direction, and a seatback is movably attached to the side bracket by a reclining device. In the jump-up seat, a stopper pin is provided on the seat cushion at a position close to the rotation shaft, and one end of a cable is connected to an operation lever of a reclining device provided on the seat back side and a seat back side is provided. A rotation restricting plate that rotates back and forth together with the seat back is fixedly attached to the side bracket. The Tsu bets, the stopper pin and arcuate long hole for sliding the pin by vertically slidably and pivotally connected to the side brackets on the rear by the elastic force of the spring
The tip-up lever that is biased in one direction and the tip-up lever that is attached to the rear of the tip-up lever so that it can swing vertically
A link with a stopper having a stopper on its side joined to the rotation restricting plate, and a link plate provided between the rotation shaft and the stopper pin and connecting the other end of the cable, The rail is provided with a latch having an engaging recessed portion which is rotatably pivoted in the vertical direction toward the bottom surface of the lower rail and is urged downward by a spring to engage with the stopper pin, and a convex portion against which the stopper pin abuts. The bottom of the latch has a restriction hole at a predetermined position in the front-rear direction so that the lower end of the latch projects downward.

When the seat is moved forward or backward to reach a predetermined position on the long lower rail, the latch provided on the upper rail falls into a restriction hole provided on the bottom surface of the long lower rail and stops. Then, when the tip-up lever is pulled downward against the elasticity of the spring, the stopper pin comes out of the engaging notch of the tip-up lever, so that the seat cushion can be jumped up in the seat back direction.

When the seat cushion jumps up, the stopper pin engages with the engaging recess of the latch, so that the latch pivots upward and the engaging pin engages with the engaging notch of the tip-up lever. Therefore, the regulation lever rotates upwards against the elasticity of the spring and comes out of the regulation hole upwards, and when the tip-up lever returns, the tip of the tip-up lever engages with the stopper pin and the seat cushion jumps up. Lock to state. Therefore, by moving the seat further forward or backward, the latch moves inside the long lower rail, and the latch cannot rotate because it abuts the bottom surface of the long lower rail.
The stopper pin engaged with the engaging recess of the latch does not come out of the regulating lever. Therefore, the operation of falling the seat cushion (SC) by operating the tip-up lever becomes impossible.

Further, since the cable is tensioned by the jump of the seat cushion (SC) and the operation lever (103) of the reclining device (R) is locked, the seat back (SB) is lifted when the seat cushion (SC) is jumped up. It will not be possible to operate the device backward.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. The one shown in the figure shows a second seat locking device arranged between the front seat and the third seat. FIG. 1 is an exploded view of a lock device according to the present invention,
In the figure, (1) is a side on which the seat cushion (SC) is arranged on both the left and right sides, the seat cushion (SC) is pivotally mounted by the rotating shaft (3) and the seat back (SB) is tiltably mounted. In the bracket, the left and right side brackets (1) are provided with an insertion hole (10) for inserting the rotation shaft (3) of the seat cushion (SC) and a lower rear portion with respect to the rotation shaft (3) of the seat cushion (SC). A circular arc-shaped long hole (11) through which the stopper pin (9) protruding to the inside slides is formed, and a pin (12) is projected behind the long hole (11).

Therefore, the seat cushion (SC) is jumped up in the seat back direction about the rotation axis (3), and the stopper pin (9) is located at the uppermost position of the elongated hole (11). Is in a use state and is in a jumping state at the lowermost position. Therefore, by jumping up and moving the seat cushion (SC) forward, the width of the seat in the front-rear direction is narrowed and the space behind the seat is expanded.

As shown in the figure, one of the side brackets (1) described above has a flip-up lock device for holding the seat cushion (SC) in a lifted state, and a seat back tilting backward in the seat cushion raised state. A seat back locking device is installed to prevent the seat back from falling over. As shown in FIG. 7, the above-described flip-up locking device lifts the seat in an upright position when the seat is moved to the jumping region (A) that is in front of the predetermined position (N) as shown by an arrow. The cushion (SC) is locked so that it does not fall down and become in use. The rear fall prevention lock device for the seat back (SB) is provided with a seat back (S
Even if the lock release operation lever of the reclining device in B) is operated, the seat back (SB) does not tilt backward, and the seat cushion (SC) jumps up with the seat back (SB) tilted backward. It locks so that it cannot be done. That is, the seat cushion (S
The shape of the seat back (SB) is kept constant.

Then, in the seating area (B) behind the predetermined position (N), the seat cushion (SC) can be flipped up as shown in FIG. 2, and the seat back (SB) can recline. It is configured so that it can be freely tilted by the device.

The predetermined position (N) mentioned above means the frontmost position of the seat where a seated person can normally sit with a certain space between the front seat and the front seat. And
A position behind this predetermined position (N) is a seating area (A) in which a seated person can normally sit on the seat and adjust the front-back position of the seat, and from the predetermined position (N) to the long lower rail (9). The jumping area (A) extends to the front end, and this jumping area (A) is a position where the seat cushion (SC) can be jumped up and the space behind it can be expanded. ) Is a position in the front-back direction where there is no normal seating space.

The flip-up locking device is fixed to the tip-up lever (2) attached to the side bracket (1), the latch (4) attached to the upper rail (6), and the bottom of the long lower rail (7). Restriction hole (5)
Etc.

The tip-up lever (2) is pivotally mounted on the pin (12) of the side bracket (1) so that the front part and the rear part can swing vertically with the pin (12) as the center, and the operation knob (on the rear side). 24) has engaging notches (21) (22) for locking the stopper pin (9) on the front side, and is attached so as to urge the rear side upward by the elasticity of the spring (23). There is.

Further, the engagement notch (21) with which the stopper pin (6) engages is formed at the lower end edge side, and the engagement notch (22) is formed at the tip end edge, respectively. Two
1) is used for locking the seat cushion (SC) in the seated state, and the front engagement notch (22) is used for locking the seat cushion (SC) in the jumped-up state.

At the rear end of the tip-up lever (2), there is connected a link (84) with a stopper (83) which constitutes a backward tilt preventing lock device for the seat back (SB).

The latch (4) has a locking pin (42) integrally fixed to the lower end thereof, an abutment portion (45) with which the stopper pin (9) abuts, and an engaging recess () with which the stopper pin (9) engages. 41) and a rotation restricting stopper portion (33), which is attached to the upper rail (6).
In the figure, (43) indicates a through hole for inserting the pin (62).

The latch (4) is interposed between a vertical portion (60B) of the upper rail (6) and a support plate (61) welded to the vertical portion (60B), and is vertically pinned by a pin (62). It is rotatably attached to the shaft and is urged downward by the elastic force of the spring (40). In the figure (62A) is a pin (6
2) Shows an insertion hole. The engaging recess (41) of the latch (4) is provided when the locking pin (42) moves downward.
It is configured so that the stopper pin (9) is inserted therein.

The locking pin (42) provided at the lower end of the latch (4) is joined to the bottom of the long lower rail (7) by the elasticity of the spring (40) to lock the long lower rail (7). It is formed long in the left-right direction so as not to fall into the holes (71). The abutment portion (45) and the engagement recess (41) of the latch (4) are notched (1) in the side bracket (1) from the lower rail (7).
It is arranged so as to project upward from 3). In the figure, (13A) shows a restricting portion that restricts the rotation of the latch (4).

A spring (40) consisting of a coil spring is mounted in the latch (4), and one end of this spring (40) is hooked on the upper rail (8). It is always urged downward by the elasticity of the spring (40).

The upper rail (6) is integrally fastened to the side bracket (1) and is fitted in the long lower rail (7) fixed to the vehicle floor so as to be slidable in the longitudinal direction. In the figure, (60A) shows the mounting portion of the upper rail (6), and (60B) shows the vertical portion where the lower portion fits inside the long lower rail (7). The latch (4) is mounted between a vertical portion (80B) of the side bracket (1), which is notched in the upper portion below the elongated hole (11), and the support plate (61). In the figure (61A) is a latch (4)
The notch into which the locking pin (42) enters when the is rotated upward, and (63) indicate the roller.

The long lower rail (7) is a long rail buried in the vehicle floor between the front seat and the third seat, and has a large number of lock holes (71) for locking a large number of upper rails (8) at its bottom portion. Are provided at regular intervals,
A synthetic resin cover (72) is integrally fixed to the upper surface exposed to the outside. In the figure, (70) shows the bottom surface of the long lower rail (7).

A large diameter with respect to the lock hole (71) is provided at a predetermined position (N) between the jumping area (A) and the seating area (B) which is the front bottom surface of the long lower rail (7). The restriction hole (5) into which the locking pin (42) falls is opened.

The backward locking lock device for the seat back (SB) includes a link plate (80) provided between the rotary shaft (3) of the side bracket (1) and the stopper pin (9), and the stopper (83). ) Link (84)
And a cable (82) that connects the operation lever (103) of the reclining device (R) provided on the seat back (SB) side and the link plate (80), and rotates together with the rear side of the seat back (SB). Rotation restriction plate (8
1) and.

The link plate (80) is provided with a connecting pin (80C) projecting substantially in the middle of its length, and the connecting pin (80C) is connected to the connecting plate (82A) provided at the end of the cable (82). It is inserted in the long hole. In the figure (80
A) shows a through hole for inserting the rotary shaft in the link plate (80), and (80B) shows the same stopper pin inserting hole.

The link (84) with the stopper (83) is
It is bent in a substantially V shape and is swingably supported by a pivot pin (85) protruding from the lower bracket (101) of the reclining device, and its tip is pin (84B) to the tip-up lever (2). And a stopper (83) is connected to the other end by a pin. In the figure, (84A) shows an insertion hole for the pivot pin (85).

The stopper (83) is a lower bracket (10
It is penetrated by the guide pieces (86) (86) provided in 1), and is configured to advance and retreat toward the rotation regulating plate (81) through the guide pieces (86) (86).

That is, when the rear portion of the tip-up lever (2) is urged upward by the elastic force of the spring (23), the link (84) swings vertically about the pivot pin (85). Link (84) because it is movably attached
The stopper (83) connected to the rear side is retracted away from the rotation restricting plate (81).

Then, the operation knob (24) provided at the rear portion of the tip-up lever (2) against the elasticity of the spring (23).
When is pressed downward, the rear portion of the link (84) is rotated upward, the stopper pin (83) is advanced in the direction of the rotation restricting plate (81), and the tip is joined to the edge of the rotation restricting plate (81). .

In the illustrated reclining device (R), an operating lever (103) for unlocking is provided on the upper bracket (102) on the seat back side, and the lower bracket (101) is integrated with the rear portion of the side bracket (1). The lower bracket (101) is fastened and the sector gear (100) is provided on the lower bracket (101), and the lock arm (104) meshing with the sector gear (100) is attached to the upper bracket (1).
02), the lock arm (104) is engaged with and disengaged from the sector gear (100) by operating the operation lever (103).

The lower bracket (101) is connected to the upper bracket (102) by the rotating shaft (105), and the upper bracket (102) is rotated in the front-rear direction about the rotating shaft (105) as a center of rotation for seat back. (S
Tilt B). In the figure (100A) is a sector ga (1
00) gear, (100B) a through hole of the rotating shaft (105), (103A) a pivot pin of the operating lever (103),
(104A) shows the gears of the lock arm (104), respectively.

By rotating the operation lever (103) in the direction of the arrow, the lock arm (104) is disengaged from the sector gear (100) and the seat back (S) is released.
The lock state of B) to the side bracket (1) is released, and one end (82B) of the cable (82) is attached to the protrusion (103B) provided on the rear side of the operation lever (103).
Are connected.

The rotation restricting plate (81) is formed in a disc shape, is integrally fastened to the upper bracket (102), rotates about the rotation shaft (105), and has a convex portion (81A) and a concave portion (rim) on the periphery. 81C) is formed. The convex portion (81A) is formed in such a size that the tip end of the stopper (83) is joined or comes close to the stopper (83) when the stopper (83) is retracted. The recess (81C) is the stopper (83).
The front end of the stopper (83) is formed so as to be joined or brought close to it when advancing. In the figure, (81B) shows a rotary shaft insertion hole.

FIG. 2 shows a locked state of the seat back (SB) and the seat cushion (SC) in the seating area (B). The seat back (SB) is locked to the side bracket (1) by the reclining device (R), When the operating lever (103) is pulled in the direction of the arrow against the elastic force of the spring (107), the lock is released and a predetermined tilting angle can be obtained. In the figure, (106) indicates a return spring.

When the seat back (SB) is tilted backward, the rotation regulating plate (81) also rotates at the same time, but the rotation regulating plate (81) hits the stopper (83) on the side bracket (1) side. The seat back (SB) can be tilted back freely because there is no Further, since the cable (82) connecting one end to the operation lever (103) is connected to the link plate (80) through the connection plate (82A) having the long hole, the operation lever is connected by the cable (82). The rotation operation of (103) is not restricted.

On the other hand, the seat cushion (SC) is locked by the stopper pin (9) engaging with the engaging cutout portion (21) of the tip-up lever (2), and this engagement state (locked state) is The tip up lever (2) is held by the elastic force of a spring (23) that urges the rear portion of the lever upward. Further, since the front side of the link (84) is biased upward by the elastic force of the spring (23), the stopper (83) provided on the rear side of the link (84) is retracted, and As described above, the rotation of the rotation regulating plate (81) is not regulated.

The side bracket (1) integral with the upper rail (6) is a latch (4) provided on the upper rail (6) and is pushed downward by the elasticity of the spring (62). The locking pin (42) of (4) is joined to the bottom surface of the lower rail (7).

Therefore, the upper rail (6) can be slid back and forth within the seating area (B) within the long lower rail (7) to adjust its longitudinal position, but when it is slid forward, the latch (4) ) Locking pin (42) falls into the restriction hole (5) of the long lower rail (7) and stops. This position is the predetermined position (N).

The upper rail (6) is locked to the long lower rail (7) by a slide rail locking device (not shown), and the lock teeth provided on the upper rail (6) have locking holes (71) shown in FIG. ), It is locked in a predetermined front and rear position.

FIG. 3 shows a case where the seat back (SB) is tilted backward in the seating area (B).
The rotation restricting plate (81) rotates with the rearward tilting of B), and the convex portion (81A) of the rotation restricting plate (81) is positioned at the tip of the stopper (83). Therefore, even if the seat cushion (SC) is jumped up to move the seat to the jumping up area (A) in this state, the stopper (83) is in contact with the convex portion (81A) of the rotation restricting plate (81). , The tip-up lever (2) cannot be operated.

Therefore, as shown in FIG. 2, the seat back (SB) must be returned to the upright state so that the concave portion (81C) of the rotation restricting plate (81) is positioned in the front end direction of the stopper (83). I have to. That is, the seat cushion (SC) cannot be jumped up with the seat back (SB) tilted backward, and the seat back (SB) must be moved to the jumping up area (A) with the tilted back. I am trying not to.

FIG. 4 shows a state in which the seat cushion (SC) is jumped up by operating the tip-up lever (2). When the seat cushion (SC) is jumped up, the seat is advanced and moved at a predetermined position (N). You can do it when you do. That is, when the seat is located at the predetermined position (N), the locking pin (42) of the latch (4) falls into the restriction hole (5) of the long lower rail (7), and the engaging recess (41) becomes the stopper pin (9). Rotate in the direction. The spring (2
When the operation knob (24) of the tip-up lever (2) is pushed downward against the elasticity of 3), the tip-up lever (2) rotates about the pin (12) and the front side moves upward. In order to move, the engaging portion notch (21) of the tip-up lever (2) that locks the stopper pin (9),
The stopper pin (9) is detached and the stopper (8
3) advances in the direction of the arrow to join the recess (81C) of the rotation restricting plate (81). Therefore, even when the seat cushion (SC) is released from the locked state with respect to the side bracket (1) and the seat back (SB) is tilted backward by the reclining device (R), the convex portion (81A) of the rotation regulating plate (81). Since the stopper (83) hits against, the rearward tilt angle of the seat back (SB) is also regulated within a certain range.

After that, when the front side of the seat cushion (SC) is lifted upward, the seat cushion (SC) rotates about the rotation axis (3) as the center of rotation and jumps upright as shown in FIG. Can be raised.

By the jumping up of the seat cushion (SC), the stopper pin (9) rotates to enter the engaging concave portion (41) of the latch (4), and the latch (4) receives the elastic force of the spring (40). Rotate upwards against. Along with this, the locking pin (42) of the latch (4) moves upward and escapes from the restriction hole (5), so that the seat can be moved to the jump area (A).

Further, the link plate (80) is simultaneously rotated by the rotation of the stopper pin (9), and the connecting pin (80C) of the link plate (80) is moved forward. Therefore, the cable (82) is in a tensioned state, and the operating lever (103) of the reclining device (R) is operated in the arrow direction to release the locked state of the seat back (SB) and tilt the seat back (SB) backward. Even if you try,
03) is pulled by the cable (82), the operation lever (103) cannot be operated, and the seat back (S
B) cannot be unlocked and pushed backward.

Then, when the tip-up lever (2) is returned to its original state by the elasticity of the spring (23), the stopper pin (9) is engaged with the engaging notch (2) of the tip-up lever (2).
Seat cushion (SC) in a jumping state with 2) engaged
Lock.

Therefore, in the state shown in FIG. 5, the upper rail (6) is unlocked from the long lower rail (7) by the slide rail locking device, and the seat is moved from the predetermined position (N) to the jumping area (A). To do. By this movement, as shown by the chain line in FIG. 7, the seat cushion (SC)
Is lifted up, and the front-back width of the seat is narrowed, so that the space behind the seat is expanded and can be effectively used as a luggage carrier or the like. After moving to the jumping up area (A), the upper rail (6) is locked to the long lower rail (7) by the lock device of the slide rail.

As shown in FIG. 6, the seat cushion (SC) is not lifted up and falls back to the seated state in the jumping up area (A), and the seat back (S) is not returned.
B) is also configured so that it cannot be pushed back.

That is, the latching pin (42) of the latch (4) is joined to the bottom surface (70) of the long lower rail (7) and cannot rotate. Therefore, even if the tip-up lever (2) is operated, the latch (4) does not rotate and the stopper pin (9) does not come out of the engaging recess (41) of the latch (4). It becomes impossible to tilt the cushion (SC) forward so that it can be seated.

In the seat back (SB), since the cable (82) connected to the operation lever (103) of the reclining device (R) is in a tensioned state, the operation lever (10) is
Since 3) cannot be unlocked by operating the reclining device (R) in the direction of the arrow, the seat back (SB) in the upright position cannot be tilted backward and the seat back (SB) cannot be seated rearward. Like

[0053]

According to the present invention, the flip-up seat integral with the upper rail slidably fitted to the long lower rail is locked in an upright position because the reclining operation of the seat back is impossible when the seat cushion is in the flip-up state. At the same time, the operation of changing the seat cushion in the jumped-up state to the used state is impossible and locked. Therefore, the seat is reliably locked when not in use, and it is difficult to sit as a seat when the seat cushion is in the raised state, and there is no possibility of accidentally seating the seat in an unstable manner. In addition, the structure is simple, and the entire locking device is compact and lightweight.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of the present invention.

FIG. 2 is a partially cutaway side view of a seated state.

FIG. 3 is a partially cutaway side view of the seat back with the seat back tilted backward.

FIG. 4 is a partially cutaway side view of a state where a tip-up lever is operated.

FIG. 5 is a partially cutaway side view when the seat cushion is raised.

FIG. 6 is a partially cutaway side view of the seat cushion in a flipped-up state.

FIG. 7 is an explanatory diagram showing an operating state of a flip-up seat.

[Explanation of symbols]

SC seat cushion SB seat back R reclining device 1 side bracket 2 Tip-up lever 3 Seat cushion rotation axis 4 latch 5 restriction holes 6 Upper rail 7 Long lower rail 9 Stopper pin 80 link plate 81 Rotation restriction plate 82 cable 83 stopper 84 links 103 Operation lever of reclining device

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B60N 2/00-2/72 A47C 7/56

Claims (4)

(57) [Claims] 1. A long lower rail on a vehicle floor side is slidably fitted with an upper rail, a side bracket is integrally fastened to the upper rail, and a seat cushion is seated between the left and right side brackets by a rotary shaft. In a flip-up seat that is pivotally attached so that it can be flipped up in a direction, and a seat back is movably attached to the side bracket by a reclining device, a stopper pin is projected on the seat cushion at a position close to the rotation shaft. Installed, the one end of the cable is connected to the operation lever of the reclining device provided on the seat back side, and the rotation restricting plate that rotates forward and backward together with the seat back is fixedly installed on the seat back side. The stopper pin slides in an arc-shaped long hole and the pin slides vertically. It is pivotally attached to the side bracket and the rear part is upward due to the elasticity of the spring.
Attached to the tip-up lever that is urged, and swingably in the vertical direction on the rear of this tip-up lever, on the rear side.
A stopper- equipped link for joining a stopper to the rotation regulating plate and a link plate provided between the rotation shaft and the stopper pin and connecting the other end of the cable are provided, and the upper is provided. The rail is provided with a latch having an engaging recessed portion that is rotatably pivoted in the vertical direction in the bottom surface direction of the lower rail and is urged downward by a spring to engage with the stopper pin and a convex portion against which the stopper pin abuts. A lock device for a flip-up seat, characterized in that a restriction hole is formed at a predetermined position on the bottom surface in the front-rear direction so that the lower end of the latch projects downward. 2. The rocking-up seat locking device according to claim 1, wherein the tip-up lever is provided with an engaging notch portion with which a stopper pin is engaged in a seat cushion seated state and a seated-up state. 3. The jumping seat locking device according to claim 1, wherein the restriction hole has a larger diameter than a lock hole for locking the upper rail to the lower rail. 4. The lock-up device for a flip-up seat according to claim 1, wherein a protrusion for restricting a rearward inclination of the seat back is provided at an edge of the rotation restricting plate against which the stopper abuts.