JPH0639234B2 - Folding seat safety device for vehicle - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foldable seat for a vehicle, and more particularly to a foldable seat safety device for a vehicle, such as a van-type vehicle, for both passenger loading and luggage loading.

[Prior Art] Conventionally, in the case of a rear seat in a van-type vehicle, for example, a so-called one-box car, when passengers are prioritized, the seats are moved rearward so that the seat cushion can be seated, and when luggage is prioritized Proposes a folding seat in which the seat cushion is folded and moved forward to increase the loading capacity.

This one is equipped with a seat lock mechanism that locks in each state and a seat lock release operation mechanism that unlocks them, and the upper rail to which the folding seat is fixed can slide on the lower rail fixed to the floor surface. Thus, the slide lock mechanism for preventing the movement of the upper rail at a predetermined position of the lower rail and the slide lock release operation mechanism for releasing the slide lock mechanism are provided.

[Problems to be Solved by the Invention] However, in such a rear seat that can be moved and folded, if the slide lock release operation is performed at the same time during the seat lock release operation to change the state of the seat cushion. , There is a risk that the rear seat may unexpectedly move and lead to an unexpected accident.

SUMMARY OF THE INVENTION An object of the present invention is to provide a safety device for a folding seat for a vehicle, which solves the above-mentioned conventional problems and restrains the movement of the seat at the time of a seat lock releasing operation and can reliably prevent a danger.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a seat lock mechanism that locks a seat cushion in a seatable state and a folded state, respectively, and unlocks the seat lock mechanism. A foldable seat having a seat lock release operation mechanism, an upper rail member movably engaged with a lower rail fixedly mounted on the vehicle floor, and the foldable seat being fixedly installed, and the seat lock release operation mechanism. A restraint mechanism that restrains relative movement of the upper rail member and the lower rail in conjunction with a lock release operation is provided, and the restraint mechanism is held so as to be capable of reciprocating relative to the upper rail member in a direction opposite to the lower rail. And is pressed to the lower rail side in response to the lock release operation of the seat lock release operation mechanism. It is characterized in that it has a moving rod and a locking portion formed on the lower rail and capable of engaging with a tip end portion of the operating rod in accordance with a lock release operation of the seat lock release operation mechanism.

[Operation] According to the present invention, the seat cushion is locked by the seat lock mechanism in the seatable state and the folded state. Thus, for example, when the seat lock release operation mechanism is operated to release the seat lock, the relative movement between the upper rail member and the lower rail is restricted by the restriction mechanism that operates in conjunction with the lock release operation. That is,
As the seat lock mechanism is unlocked, the operating rod is pushed toward the lower rail, and the tip of this operating rod engages with the locking portion formed on the lower rail, resulting in relative movement between the upper rail member and the lower rail. Be detained.

Therefore, even if the slide lock release operation is performed due to the passenger's erroneous operation during the seat lock release operation, the seat does not move and the unexpected danger can be reliably prevented.

Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings.

A vehicle seat to which the present invention is applied in FIGS. 1 and 2.
An example of 10 is shown.

The seat 10 includes a pair of left and right upper rail members 14 that move along a pair of left and right lower rails 12 that are fixedly installed on the vehicle floor, and a pair of left and right legs that serve as bases that are fixedly installed on the upper rail members 14. 16 and a seat cushion 20 rotatably supported on the leg 16 by a pivot pin 18 between a seatable state shown in FIG. 1 and a folded state shown in FIG. And a seat back 22 supported so that the inclination angle can be adjusted via the reclining mechanism. Then, the seat 10 is moved forward with the seat cushion 20 being folded, and a luggage loading space is secured behind it. Also seat cushion
A first striker 24 is provided at the center of the lower surface of the seat 20, and a second striker 26 is provided at the rear end of the lower surface of the seat cushion.
It is fixed to 20 strength members.

The leg portion 16 is fixed to the upper surface of the upper rail member 14 as shown in FIG. That is, as shown in FIG. 4, the upper rail member 14 includes an upper rail main body 14A having a substantially L-shaped cross section having a vertical portion 14A ₁ and a horizontal portion 14A ₂ , and a vertical portion 14A.
₁ is a substantially U-shaped inner reinforcing member 14B having an opening at the top, which is fixed by welding while being engaged with the protrusion 14A ₃ provided on the lower edge of the vertical protrusion 14A ₃ and the inside of the protrusion 14A ₃ of the vertical portion 14A _1. The reinforcing member 14B and a substantially U-shaped outer reinforcing member 14C fixed by welding are provided. Then, the leg portion 16 is fixedly mounted via front and rear mounting brackets 14D and 14E fixedly mounted on the horizontal portion 14A ₂ of the upper rail main body 14A.

The lower rail 12 has a substantially V-shaped cross section, has an opening 12A in the longitudinal direction at the center upper portion thereof, and is entirely fixed in a groove formed on the vehicle floor. In this embodiment, two lock holes 12B are formed side by side in the longitudinal direction at predetermined positions on both upper surfaces of the lower rail 12.

Further, rollers 14F and 14G are rotatably pivoted at the front end and the rear end of the vertical portion 14A ₁ of the upper rail member 14, respectively, and roll along the lower surface of the lower rail 12,
The vertical portion 14A ₁ of the upper rail member 14 described above is provided with the opening 12A.
It is arranged to move inside.

Reference numeral 30 denotes a latch member that constitutes a part of a slide lock mechanism that locks the upper rail member 14 to the lower rail 12, and in this embodiment, the horizontal portion 30A, the vertical portion 30B, and the hook portion 30.
It is composed of two plates with C and 30C, and the hook 30
C, latch tooth 30C ₁ that engages from below upwards into the lock hole 12B to the distal end of the 30C described above are formed, respectively. Horizontal part 30A of the latch member 30 and the upper rail member 1
A compression spring 32 is contracted between the horizontal portion 14A _{2 of} 4 and the latch member 30 upward, that is, the latch tooth 30C ₁ is locked in the lock hole 12B.
Is urged in the direction to engage with. Then, the latch member 30
The vertical portion 30B is the vertical portion 14A of the upper rail member 14 ₁
The formed notch 14A _4, the hook portion 30C inner reinforcing member 1
It is housed in a notch 14B ₁ formed in 4B, and is further arranged to penetrate a notch 34A formed in a substrate 34 fixed to the horizontal portion 14A ₂ of the upper rail member 14. A lid member 36 having an opening window 36A formed on the upper surface of the substrate 34 is fixed by screws 38 (see FIG. 3).

Further, the mounting bracket 14D at the front end portion of the upper rail member 14 is provided with a restraint mechanism 40 that restrains relative movement between the upper rail member 14 and the lower rail 12 in conjunction with a lock release operation of a seat lock mechanism described later. . That is, 42 is an operating rod having a bent portion 42A formed in the upper portion and a guide pin 42B planted in the middle abdominal portion, and the mounting rod 14D and the horizontal portion 14A ₂ of the upper rail member 14 are respectively formed with holes. It penetrates through the hole shown and is inserted into the opening 12A of the lower rail 12. Further, the mounting bracket 14D has a through hole 44A through which the operating rod 42 is inserted in the upper wall and a guide pin 4 in the opposite wall.
A substantially U-shaped guide frame 44 formed with a guide elongated hole 44B for guiding 2B is fixed by welding, and a compression spring 46 for urging the guide pin 42B and the operating rod 42 upward is provided therein.
Has been reduced.

The lower end of the operating rod 42 is capable of entering a locking hole 12C formed at a predetermined position on the lower surface of the lower rail 12, and this locking hole 12C corresponds to the locking portion of the present invention.

Next, the seat lock mechanism 100, the lock release operation mechanism thereof, and the lock release operation mechanism of the slide lock mechanism described above will be described.

The seat lock mechanism 100 is shown in FIGS. 3 and 5 to 9.
As shown in the drawing, a first base plate 102 having a substantially U shape in a plan view, and a second base plate 10 fixed to the first base plate 102 to form an intermediate wall 104A.
4 and both are fixed to the front end wall of the leg portion 16. 106 is a weld nut for this fixing.

Reference numeral 108 denotes a first rotation shaft rotatably supported by the first and second base plates 102 and 104, and an operation lever 110 for unlocking the seat lock is fixed to be relatively non-rotatable. A locking plate 112 for locking a first latch member, which constitutes a part of a seat lock mechanism in a seatable state described later, and a lock detection, which constitutes a part of an unlock operation prohibiting mechanism, on the first rotating shaft 108. The levers 114 are rotatably pivotally attached, respectively, and the cam plate 116 that comes into contact with the bent portion 42A of the actuating rod 42 and the lock claw member 118 that forms a part of the unlock operation prohibiting mechanism relatively rotate. It is permanently fixed.

Reference numeral 120 denotes the above-mentioned first latch member, which is a clockwise direction in FIG. 7 with a winding spring 124 wound around a bearing shaft 122 fixed to the intermediate wall 104A of the first base plate 102 and the second base plate 104. Being energized. Thus, the first base plate 102 and the second base plate 1
On the upper side of the intermediate wall 104A of 04, guide notches 102A and 104B for receiving the above-mentioned first striker 24 are formed, respectively, and the first latch member 120 has an abutting portion where the first striker 24 abuts. First striker connected to 120A
A locking notch 120B for locking 24 is formed. Further, the first latch member 120 has a locking step 120C capable of locking the edge of the locking plate 112 described above.

The locking plate 112 described above is shown in FIGS.
As is apparent from the drawing, the side view has a substantially L-shape, and the end edge of one leg portion 112A can be engaged with the engagement step portion 120C of the above-mentioned first latch member, and the other leg portion. A bent portion 112C is formed at the tip of 112B. The locking plate 112 is wound by the winding spring 126 wound around the first rotating shaft 108.
Therefore, the bent portion 112C is biased in the counterclockwise direction in FIG. 10 so as to engage with the above-mentioned operation lever 110 and cooperate therewith.

The operation lever 110 is locked with the above-mentioned second striker 26,
It also serves as a second latch member forming a part of the seat lock mechanism in the folded state, and the whole is hook-shaped, and the base end is fixed to the first rotating shaft 108 as described above. Therefore, a locking notch 110B for locking the second striker 26 is formed at the outer edge portion so as to be continuous with the contact portion 110A with which the second striker 26 contacts. Further, the inner edge portion is provided with a bent portion 110C, and the other end of the tension spring 128 whose one end is locked to the first base plate 102 is locked to this bent portion 110C, whereby the counterclockwise direction is shown in FIG. It is held in contact with the first base plate 102 while being biased in the circumferential direction.

The lower side wall and the rear wall of the first base plate 102 have guide cutouts 10 for receiving the above-described second striker.
2B is formed.

Further, a stopper 102C is formed on the first base plate 102 by being cut and raised, and an inner edge portion of the operation lever 110 is brought into contact with the stopper 102C to regulate the rotation amount to a predetermined amount.

Next, the lock detection lever 114 is formed in a J shape, and its end portion is located in the guide notch 102B described above, and the second striker
An engagement notch 114A that engages with 26 is formed. further,
A first bent portion 114B and a second bent portion 114C are formed at the head end portion, and one end of the first bent portion 114B is anchored to a second rotary shaft 130, which will be described later. The other end of is locked (5th
7), the lock detection lever 114 is biased counterclockwise in FIG.

The second rotation shaft 130 is rotatably supported by the first and second base plates in parallel with the first rotation shaft 108, and the stopper member 134 and the arm member 136 forming a part of the lock release operation prohibiting mechanism are provided. It is fixed so that it cannot rotate relative to it.

The stopper member 134 is, as shown in FIG.
The first and second stopper portions 134A and 134B are provided symmetrically about the axis of the rotary shaft 130 as shown in FIG.
4A is on the second bent portion 114C of the lock detection lever 114,
The second stopper portions 134B can be locked to the locking pieces 102D formed by cutting and raising the first base plate 102, respectively.

The tip of the arm member 136 is connected to the connecting link 138 for operating the slide lock mechanism described above, and the claw 118A of the lock claw member 118 described above prevents rotation of the arm member 136 in the middle abdomen thereof. Engagement notches 136A are formed to engage with each other. Further, the arm member 136 is formed with an arcuate portion 136B capable of contacting the claw 118A (see FIG. 9).

A winding spring 140 is wound around the second rotating shaft 130, and the arm member 136 and thus the second rotating shaft 130 are biased counterclockwise in FIG. 7 and clockwise in FIG. Is brought into contact with the stopper piece 102E formed by cutting and raising the first base plate 102 (see FIG. 8).

Further, 142 is a shock absorber installed in the guide notch 102B of the first base plate 102, and includes an elastic body 142A and a second striker.
It has a case member 142B fixed to the second base plate 102 to be held while surrounding the elastic body 142A except for the contact portion with 26.

Further, as shown in FIGS. 1 and 2, first and second operation handles 144 and 146 made of resin are fixed to the tip end of the operation lever 110 and the shaft end of the second rotary shaft 130, respectively.

Further, a cam plate 201 rotatably supported by a support shaft 202 supported by the leg portion 16 is connected to the rear end of the connection link 138. The cam surface of the cam plate 201 is the lid member 3 described above.
It faces the opening window 36A of 6 and is in contact with the horizontal portion 30A of the latch member 30. The cam surface of the cam plate 116 fixed to the first rotating shaft 108 is the operating rod 42 as described above.
Is in contact with the bent portion 42A.

The operation of this embodiment having the above configuration will be described below.

When the seat cushion 20 is in the seatable state shown in FIG. 1, the first striker 24, as shown in FIG.
Guide notch in first and second base plates 102 and 104
It is received in 102A and 104B and is locked in the locking notch 120B of the first latch member 120. The first latch member 120 is rotated against the urging force of the coil spring 124 as described above, but its locking step 120C is locked by the end edge of the leg 112A of the locking plate 112. The movement is blocked and the locked state is maintained.

In this seatable state, the lock detection lever 114
Is rotated counterclockwise in FIG. 10 by the urging force of the tension spring 132 as described above, and the second bent portion 11
4C is engaged with the first stopper member 134A of the stopper member 134. Therefore, the rotation of the second rotary shaft 130 by the second operation handle 146 and the rotation of the arm member 136 are prevented, and the latch member 30 is pushed down via the connecting link 138, that is, the slide lock mechanism is released. It is considered impossible to operate.

In the consuming slide locked state, engages latch teeth 30C ₁ of the latch member 30 with the urging force of the compression spring 32 into the lock hole 12B of the lower rail 12 as shown in Figure 4.

Further, when the seat 10 is unlocked in the seatable state, the first operating handle 144 is pulled upward in FIG. 10, that is, the operating lever 110 is moved to the stopper 1 described above.
The first rotating shaft 108 is rotated clockwise until it abuts the 02C. Then, the locking plate 112 in which the bent portion 112C is engaged with the operation lever 110 by being biased in the counterclockwise direction by the above-mentioned winding spring 126 also rotates with the operation lever 110 constantly, and its leg portion 112A. Edge and first latch member 120
The engagement with the engagement step 120C is released. As a result, the first
The latch member 120 is returned to its original position by the biasing force of the above-mentioned winding spring 124.

Therefore, in this state, the seat cushion 20 can freely rotate.

By the way, with the rotation of the first rotary shaft 108 by the above-mentioned operation lever 110, the cam plate 116 fixed to this also rotates. Then, the cam surface of the cam plate 116 has the restraint mechanism 4
The lower end of the operating rod 42 is in contact with the bent portion 42A of the operating rod 42 of 0, and the lower end of the operating rod 42 is associated with the rotation of the cam plate 116.
Will enter the locking hole 12C. In this way, the lower end of the operating rod 42 guided by the guide frame 44 fixed to the upper rail member 14 enters the locking hole 12C of the lower rail 12 so that the relative movement between the upper rail member 14 and the lower rail 12 is performed. The seat 10 is restrained, and thus the movement of the seat 10 is restrained.

Further, during the above-described rotation operation of the operation lever 110, the lock claw member 118 fixed to the first rotation shaft 108 also rotates at the same time, and the claw portion 118A of the lock claw member 118 is engaged with the engagement notch 136 of the arm member 136.
Arm member 136 engaged with A and operated by the second operation handle 146
Therefore, the unlocking operation of the slide lock mechanism is prohibited.

On the other hand, in order to move the seat cushion 20 from the freely rotating state to the folding position and lock it,
It suffices to simply rotate the 20 around the pivot pin 18, and in this way, the second striker 26 first moves the abutting portion 110A and the abutting portion 110A of the operating lever 110 located in the guide cut 102B of the first base plate 102. The operating lever 110 and the lock detecting lever 114 are rotated by abutting against the lock detecting lever 114, and are locked by the locking notch 110B and the engaging notch 114A. At this time, the impact of the second striker 26 is absorbed by the above-described shock absorber 142 provided in the inner portion of the guide cutout 102B.

This fold lock state is shown in FIG. In this state, the lock detection lever 114 is rotated clockwise by the second striker 26 against the urging force of the tension spring 132, so that the second bent portion 114C and the stopper are stopped. The engagement of the member 134 with the first stopper portion 134A is released, and the slide lock mechanism can be released.

That is, when releasing the slide lock mechanism, the second lock
When the operation handle 146 is pulled up and the second rotation shaft 130 is rotated, the arm member 136 is also rotated, and the cam plate 201 is rotated around the support shaft 202 via the connection link 138. Then, the latch member 30 is pushed down against the urging force of the compression spring 32, and the lock hole 12B of the lower rail 12 of the latch tooth portion 30C ₁ is pressed.
Is disengaged. Therefore, the upper rail member 14
As a result, the seat 10 can be freely moved along the lower rail 12.

By the way, when the arm member 136 is being rotated by the above-described operation handle 146, the claw portion of the lock claw member 118 is formed.
Since 118A contacts the arcuate portion 136B of the arm member 136, the rotation of the first rotation shaft 108 is blocked, and the unlocking operation of the seat lock mechanism is prohibited.

When the seat 10 is unlocked in the folding lock state, the first operation handle 144 described above is pulled upward and the operation lever 110 is contacted with the stopper 102C until the seat 102 is brought into contact with the stopper 102C. 1. Rotate clockwise with the rotary shaft 108. Then, the restraint of the second striker 26 locked in the locking notch 110B is released,
The seat cushion 20 is in a state where it can freely rotate.

During the turning operation of the operation lever 110, as described above, the claw portion 118
A engages with the engagement notch 136A of the arm member 136, and the unlocking operation of the slide lock mechanism is prohibited.

[Effects of the Invention] As is clear from the above description, according to the present invention, the restraint mechanism that restrains the relative movement of the upper rail member and the lower rail in association with the lock release operation of the seat lock release operation mechanism is provided. Therefore, it is possible to surely prevent a risk that the seat unexpectedly moves during the seat lock releasing operation.

[Brief description of drawings]

1 and 2 are side views showing an example of a vehicle seat to which the present invention is applied, showing a seatable state and a folded state, respectively. 3 is a perspective view showing an embodiment of the present invention, FIG. 4 is a sectional view showing a slide lock mechanism portion of an embodiment of the present invention, and FIG. 5 is a seat lock mechanism portion of an embodiment of the present invention. FIG. 6 is a plan view of the same, FIG. 6 is a rear view of the same, FIG. 7 is a left side view of the same without the locking plate for easy understanding, and FIG. 8 is a right side view of the same. FIG. 9 is a sectional view taken along the line BB of FIG. 5, and FIGS. 10 and 11 are transparent views taken along the line CC of FIG. 5 for explaining the operation of the embodiment of the present invention. 10 ... Seat, 12 ... Lower rail, 12A ... Opening part, 12B ... Lock hole, 12C ... Locking hole, 14 ... Upper rail member, 16 ... Leg part, 18 ... Pivot pin, 20 ... Seat cushion, 22 ... Seat back , 24 ... First striker, 26 ... Second striker, 30 ... Latch member, 40 ... Restraint mechanism, 42 ... Actuating rod, 100 ... Seat lock mechanism, 102 ... First base plate, 104 ... Second base plate, 108 ... First Rotation shaft, 110 ... Operating lever, 112 ... Locking plate, 114 ... Lock detection lever, 116 ... Cam plate, 118 ... Lock claw member, 120 ... First latch member, 130 ... Second rotation shaft, 134 ... Stopper member, 136 … Grounding member, 138… Connection link, 144… First operating handle, 146… Second operating handle, 201… Cam plate.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hidemasa Hirakui 1-14-7 Maruyama, Isogo-ku, Yokohama, Kanagawa Oi Manufacturing Co., Ltd. (72) Hideki Irie 771, Koen, Ayase, Kanagawa Ikeda Bussan In-company (72) Inventor Mikio Fujiwara 771 Kozono, Ayase-shi, Kanagawa Ikeda Bussan Co., Ltd. In-company (56) References Mitsuhei Taira 1-114330 (JP, U)

Claims (1)

[Claims] 1. A foldable seat having a seat lock mechanism for locking a seat cushion in its seatable state and a foldable state respectively, and a seat lock release operation mechanism for unlocking the lock by said seat lock mechanism, and a vehicle floor. An upper rail member movably engaged with a lower rail fixedly mounted on the foldable seat, and an upper rail member interlocking with a lock release operation of the seat lock release operation mechanism, and a relative position between the upper rail member and the lower rail. A restraint mechanism for restraining movement, and the restraint mechanism is held reciprocally with respect to the upper rail member in a direction opposite to the lower rail, and is accompanied by a lock release operation of the seat lock release operation mechanism. An operating rod whose one end side is pressed to the lower rail side; and an operating rod formed on the lower rail, A foldable seat safety device for a vehicle, comprising: a locking portion with which the other end of the actuating rod can be engaged with the unlocking operation of the seat lock releasing operation mechanism.