JPH09109746A - Seat device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide comfortable seating in a relax attitude forwardly extending a leg in a seat in a turn position facing inside a cabin, by providing a parallel link turnably supporting a frame on a base, and setting the instantaneous center of turning to a seat rearward by this parallel link. SOLUTION: A turn mechanism for a driver seat 4 has a frame loading the seat 4, a base fixed to a cab floor and two links 8a, 8b supporting the frame onto the base. The links 8a, 8b are turnably engaged with the frame and the base respectively through a pin, and a parallel link turning the frame on the base is formed. By adjusting arrangement and length of the links 8a, 8b, an instantaneous center (p) of the parallel link is set to a rearward of the seat 4 on its center line (m). Accordingly, the driver seat 4, without interfering with a side surface of a cabin, internal accessory part 3 behind the seat, or the like can turn the seat front inside the cabin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of a seat device used in a vehicle.

[0002]

2. Description of the Related Art As a conventional seat device, conventionally, a comfortable sitting posture can be taken according to the physique and taste of an occupant.
There is known one that adjusts the front-rear position of the seat, the inclination angle of the seat back, and the like and that has an adjuster mechanism (Japanese Utility Model Laid-Open No. 5-56574, etc.). In addition, in order to improve the entry / exitability of the vehicle, some seats can be turned to the door side.

[0003]

By the way, a bed is provided at the rear of the cab in a heavy-duty truck for the purpose of resting passengers, but in the case of a medium-duty truck or a light-duty truck, there is no bed space, and a seat is often used for resting. To be done. In that case, there is not enough space in front of the seat, and even if the seat back is tilted backwards to take a rest, there is a problem that the relaxed posture in which the legs are extended forward cannot be obtained.

The present invention aims to solve such problems.

[0005]

According to the first aspect of the invention, a frame on which a seat is placed, a fixed base on the floor side, and a parallel link for pivotably supporting the frame on the base are provided. The center of turning is set to the rear of the seat.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided lock means for fixing the frame on the base to a normal position along the front-rear direction of the vehicle and a turning position at a predetermined angle so that the front of the seat faces the inside of the vehicle compartment. Set up.

According to a third aspect of the present invention, in the first aspect, means for supporting the seat on the frame so as to be movable in the front-rear direction of the vehicle is provided.

In a fourth aspect based on the first aspect, operating means for rotating the frame on the base is provided.

In a fifth aspect based on the first aspect, an actuator for turning the frame on the base is provided.

[0010]

According to the first aspect of the invention, since the instant center of turning is located behind the seat, even in a seat such as a driver seat arranged on a side portion of the passenger compartment, the side surface of the passenger compartment, interior parts behind the seat, etc. It is possible to turn the front of the seat toward the inside of the vehicle compartment using the adjacent small space without interference. Therefore, it is possible to sit comfortably in a relaxed posture with the legs extended forward on the seat in the turning position toward the inside of the vehicle.

According to the second invention, it is possible to properly prevent the seat from freely turning.

According to the third aspect of the invention, when the seat is moved rearward on the frame at the turning position toward the vehicle interior side, a wider space in front of the seat can be secured.

According to the fourth invention, it is possible to manually turn the seat while seated on the seat.

According to the fifth invention, the seat can be moved via the actuator by a simple switch operation.

[0015]

1 is a plan view showing the interior of a truck cab 1, in which an interior component 3 extending from both sides of an assist seat 2 in a rearward direction is provided. The interior component 3 is extended to the driver seat 4 side and is formed so as to surround the rear of the seat in a curved manner. The assist seat 2 is fixed to the cab floor, and the driver seat 4 is arranged on the cab floor via a turning mechanism described later. Reference numeral 5 denotes an instrument that extends in the vehicle width direction at the front part of the room.

As shown in FIG. 2, the swivel mechanism of the driver seat 4 includes a frame 6 on which the seat 4 is placed, a base 7 fixed to the cab floor, and two links 8a for supporting the frame 6 on the base 7. 8b. The links 8a and 8b are rotatably engaged with the frame 6 and the base 7 via pins 9a and 9b, respectively, and form parallel links that rotate the frame 6 on the base 7. And the links 8a, 8
By adjusting the arrangement and the length of b, the instantaneous center p of the parallel link is set behind the seat 4 on the center line m of the seat 4 as shown in FIG.

In order to movably support the seat 4 on the frame 6 in the front-rear direction, rails 10 are attached to both sides of the frame 6, and a slider (not shown) that slides on the rail 10 and its movement at an arbitrary position. A locking mechanism for restricting is provided on the leg portion of the seat 4. Frame 6 on base 7
Stoppers 11a and 11b for restricting the turning of the
A locking metal fitting 12 is attached to the frame 6 so that the seat 4 abuts on the stoppers 11a and 11b at a normal position along the front-rear direction of the vehicle and a turning position at a predetermined angle with the front of the seat facing the inside of the vehicle.

A lock lever 13 is provided on the frame 6 as a locking means for fixing the seat 4 to the normal position and the turning position. The lock lever 13 is formed in a dogleg shape having one end as a grip portion and the hook 13a at the other end.
The 3a side is projected downward from the guide hole 14 and is attached so as to be freely rotatable in the vertical direction with the lever intermediate portion as a fulcrum. When the lock lever 13 is rotated within the range of the guide hole 14, lock holes 15a and 15b that can be engaged with the hook 13a are formed in the base 7 at the normal position and the turning position of the seat 4.

With such a structure, when the occupant is resting, the hook 13a of the lock lever 13 is removed from the lock hole 15a at the normal position, and the frame 6 on the base 7 is moved to the inside of the vehicle. Since the center p is located on the rear side of the seat, the driver seat 4 can swivel the front side of the seat toward the inside of the vehicle compartment without interfering with the side surface of the passenger compartment or the interior component 3 behind the seat. When the hook 13a of the lock lever 13 is engaged with the lock hole 15b at the turning position where the locking metal fitting 12 abuts on the stopper 11b, the driver seat 4 is fixed at the turning position with its front side facing the vehicle interior side.

Therefore, the occupant can sit comfortably on the seat 4 in the turning position in a relaxed posture with the legs extended forward. Seat 4 is rail 1 on frame 6
Since it is movable in the front-rear direction via 0, when the front of the seat is moved rearward at the turning position toward the vehicle interior side, the space in front of the seat is further expanded. That is, frame 6
By adjusting the front-back position of the seat 4 above, the space in front of the seat required for rest can be increased or decreased according to the physique of the occupant.

When returning the driver seat 4 to the normal position, the hook 13a of the lock lever 13 is removed from the lock hole 15b at the turning position and the seat 4 is turned to the opposite side. Then, at the normal position where the locking metal fitting 12 hits the stopper 11a, the hook 13a of the lock lever 13 is
Is engaged with the lock hole 15a, the driver seat 4 is fixed at a normal position along the front-rear direction of the vehicle.

FIG. 3 illustrates another embodiment, in which the arm 17 is fixed to the frame 6 at the base end side thereof. The front end of the link 8b is rotatably coupled to the tip of the arm 17 by a pin 9a, and the rear end of the link 8b is similarly coupled to the base 7 by a pin 9b. The link 8a is rotatably connected to the frame 6 at the front end and to the base 7 at the rear end via pins 9a and 9b, respectively. Then, the instantaneous center (p in FIG. 1) of the parallel link formed by these links 8a and 8b is set to the rear of the driver seat 4 as described above.

The base 7 is provided with a lever 18 for turning operation for pressing the base end of the arm 17. The lever 18 has a grip portion at one end and a push portion 18 with the arm 17 at the other end.
It is formed in a dogleg shape having a and is supported rotatably in the horizontal direction with a pin 19 protruding from the upper surface of the base 7 as a fulcrum.
Then, when the lever 18 is rotated to the side of the frame 6, the arm 17 is pushed by the push portion 18a of the lever 18, and while rotating the parallel link, the frame 6 integrally rotates with the arm 17 toward the vehicle interior. It is designed to move to a position.

A spring 20 for assembling the frame 6 to the normal position is assembled. As shown in FIG. 4, the spring 20 is interposed by winding an intermediate portion around the pin 9a at the front end portion of the link 8a and locking both ends thereof to the frame 6 and the link 8a. Locking means (not shown) is provided to fix the seat 4 in the normal position and the turning position.

According to this, the lever 18 is attached to the spring 2
When the driver seat 4 is rotated against 0, the driver seat 4 moves to the turning position on the inside of the vehicle compartment, and when the lever 18 is released, the spring 1 is released.
It is returned to the normal position by the biasing force of 8. Further, the driver seat 4 can be fixed at the turning position and the normal position by using the locking means. Also in this case, since the instantaneous center p of the parallel link formed by the two links 8a and 8b is located on the rear side of the seat, the front side of the seat is not interfered with without interfering with the side surface of the passenger compartment or interior parts behind the seat. It can be turned to the indoor side.

FIG. 5 shows an embodiment provided with an actuator for automatically rotating the frame 6 on which the driver seat 4 is placed on the base 7. A motor 21 as an actuator is attached to the frame 6 via a bracket 22. . The rear end of the link 8b is a pin 9b on the base 7.
It is rotatably supported by the rotary shaft 21a of the motor 21 and is connected to the front end thereof. Although not shown, a gear is coupled to the rotary shaft 21a of the motor 21, and a tooth surface meshing with the gear is formed in the engaging hole 23 of the link 8b.

When the motor 21 is driven, its rotating shaft 21
The link 8b is rotated around a. Since the rear end of the link 8b is supported on the base 7 by the pin 9b, the motor 21
The pin 6b at the rear end of the frame 6
Rotate so as to turn. Although the link forming a parallel link with the link 8b is not shown, the front end portion is the frame 6
In addition, the rear end portion is rotatably coupled to the base 7 via pins.

In this case, the motor 2 is switched by switching the switch.
When the driver 1 is controlled to rotate forward and backward by a predetermined angle, the driver seat 4 can be moved between the normal position and the turning position by one switch operation. Further, the stopper means for restricting the normal position and the turning position of the frame 6 can be omitted.

[0029]

According to the first aspect of the present invention, the frame on which the seat is placed, the fixed base on the floor side, and the parallel link for pivotably supporting the frame on the base are provided. Since the momentary center is set to the rear of the seat, even for seats placed on the side of the passenger compartment such as the driver seat, a small space adjacent to the front of the seat can be created without interfering with the side surface of the passenger compartment or interior parts behind the seat. Since the vehicle can be turned to the inside of the passenger compartment by using the seat, the seat can be seated at the turning position in a relaxed posture with the legs extended forward, so that the seat can be comfortably seated.

According to a second aspect of the present invention, in the first aspect of the present invention, a lock for fixing the frame on the base to a normal position along the front-rear direction of the vehicle and a turning position at a predetermined angle with the front of the seat facing the inside of the vehicle compartment. Since the means is provided, it is possible to properly prevent the seat from freely turning.

According to the third invention, in the first invention, the means for supporting the seat on the frame so as to be movable in the front-rear direction of the vehicle is provided, so that the seat is framed at the turning position toward the inside of the vehicle. If you move the top backward, you can secure a wider space in front of the seat.

According to the fourth invention, in the first invention, since the operating means for turning the frame on the base is provided, it is possible to manually turn the frame while seated on the seat.

According to the fifth invention, in the first invention, since the actuator for turning the frame on the base is provided, the seat can be moved to the normal position and the turning position by a simple switch operation. .

[Brief description of the drawings]

FIG. 1 is a plan view of the inside of a cab representing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the seat turning mechanism.

FIG. 3 is an exploded perspective view of a seat turning mechanism representing another embodiment.

FIG. 4 is a partially exploded perspective view of the same.

FIG. 5 is an exploded perspective view of a main part of another embodiment.

[Explanation of symbols]

 4 Driver seat 6 Frame 7 Base 8a, 8b Link 9a, 9b Pin 10 Rail 11a, 11b Stopper 12 Locking metal fitting 13 Lock lever 15a, 15b Lock hole 17 Arm 18 Swiveling lever 20 Spring 21 Motor

Claims (5)

[Claims] 1. A frame on which a seat is placed, a base fixed on the floor side, and a parallel link for supporting the frame so that the frame can be swung on the base are provided, and the instantaneous center of turning is set to the rear of the seat by this parallel link. A vehicle seat device characterized by the above. 2. A lock means for fixing the frame on the base to a normal position along the front-rear direction of the vehicle and a turning position at a predetermined angle so that the front of the seat faces the inside of the vehicle compartment. The seat device according to 1. 3. The seat device according to claim 1, further comprising means for supporting the seat on the frame so as to be movable in the front-rear direction of the vehicle. 4. The seat device according to claim 1, further comprising operating means for rotating the frame on the base. 5. The seat device according to claim 1, further comprising an actuator for rotating a frame on the base.