JPH0625156Y2 - Seat tilt-up mechanism - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention interlocks with the reclining operation of the seat back of various seats of an aircraft, a ship, a railway vehicle, etc. (hereinafter referred to as "vehicle etc."). The present invention relates to a seat tilt-up mechanism that slightly tilts and raises the front.

[Prior Art] Conventionally, there is one in which an inclination angle of a seat bottom that constitutes a seat of an aircraft or a vehicle varies. This type of device generally has a structure in which a seat bottom frame on which a seat bottom is placed is connected and driven with a seat back frame that constitutes a seat back that changes a reclining tilt angle. It was provided with a so-called seat tilt-up mechanism in which the seat bottom is raised to a preferable height in conjunction with the frame.

As such a seat tilt-up mechanism, for example, as shown in FIG. 7, appropriate positions on both left and right sides of a seat back frame 51 for mounting a seat back of a seat are rocked on a seat base frame (not shown). A lower end portion 5 of the seat back frame 51 is attached to an arm 53 projecting at a rear end portion of a seat bottom frame 52 that is movably attached and that moves back and forth in an interlocking manner with the seat back.
An inclined slide member 55 having an inclined slide surface with respect to the upper surface of the front beam 54 is fixedly provided on the lower surface of the seat bottom frame 52 for connecting the seats 1a, and when the seat back is inclined, the inclined slide member 55 is interlocked with the seat bottom. A structure is proposed in which the inclined sliding member 55 slides on the front beam 54 at the same time that the frame 52 advances forward (direction A), and the front end portion of the seat bottom frame 52 can be raised (direction B). Has been done.

[Problems to be solved by the device]

However, in the above-described conventional seat tilt-up mechanism, the seat bottom frame 52 can be raised, but the reclining tilt of the seat back, that is, the tilt direction (C direction) of the seat back frame 51 and the seat bottom, that is, the seat bottom frame. Since 52 moves forward (direction A), there is a problem that the maximum distance (A + C) is displaced, and the back of the occupant's back jacket or shirt is pulled backwards, making it uncomfortable to sit on. It was

The present invention was created in view of the above problems, and facilitates the lifting operation of the seat bottom frame with a simple structure.
It is an object of the present invention to provide a seat tilt-up mechanism that can be smoothly performed and that does not cause a positional deviation between a rear end portion of a seat bottom and a lower end portion of a seat back.

In order to achieve the above object, a tilt-up mechanism for a seat according to the present invention comprises a bracket erected on a rear portion of a base frame of a seat so that each rear end portion of the seat bottom frame can swing up and down on the front side of the seat bottom frame. The support rod is rotatably horizontally installed between the front portions of the base frames, and the upper arm that tilts up the seat bottom frame is located on one side of the outer periphery of the support rod toward the front of the seat. An actuator that is tilted upright and has a lower arm tilted upright toward the rear of the seat on the other side is pivotally attached to the base frame in a rotatable manner, and a roller configured at the tip of the upper arm of the actuator is installed. The plate-shaped bearing attached to the front part of the lower surface of the seat bottom frame is abutted, and the lower arm tip part of the actuator is formed in the lower part of the seat back frame. And the other end of the pressing rod pivotally attached to the lower end of the breakover arm, and a tension member is interposed between the rear end of the pressing rod and the base frame to interlock with the tilting motion of the seat back. The gist is that the seat bottom frame can be raised by rotating the actuator.

Further, the pressing rod can be driven by the rotation of the gear of a driving machine provided in the lower portion of the seat bottom.

[Action]

Thus, according to the above configuration, when the seat back, that is, the seat back frame is reclining and inclined backward,
A pressure rod that moves forward in conjunction with this rotates the actuator upward, and a roller provided in this actuator abuts the lower surface of the seat bottom frame, and tilts this seat bottom frame upward (tilt up). be able to.

Especially, since the fulcrum of the seat back that tilts reclining and the fulcrum of the seat bottom that tilts up are very close,
It is possible to tilt and raise the seat bottom frame without moving it forward.

〔Example〕

An embodiment of a seat tilt-up mechanism according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a seat that constitutes a tilt-up mechanism for a seat according to the present invention, where 1 is a seat back of the seat and 2 is a seat back.
Is a seat back frame for mounting and fixing the seat back 1, each lower end portion of which is pivotally attached to an appropriate position of the base frame 3 of the seat, and pivots rearwardly at the lower end portion, and if desired, the upper portion It is configured so that the side can be tilted in the front-rear direction.

2 and 3 show a seat tilt-up mechanism according to the present invention, and 4 is a seat bottom frame bent in a U shape, which is a base frame 3 of the seat.
The rear ends of both of which are mounted on the brackets 5 and 5 which are erected on the inner side of the rear beam that constitutes the base frame 3 so that the front side can be swung up and down. It was installed like this. A seat bottom 6 is mounted on the upper part of the seat bottom frame 4. Also,
The seat back frame 2 is connected to a breakover arm 7 mounted coaxially with the lower end shaft support portion thereof, so that the impact applied to the rear of the seat back frame 2 can be absorbed by the frictional forces of the sliding surfaces of the two. Has become.

Reference numeral 8 denotes an actuator that is pivotally attached to the base frame 3 in a front portion of the lower surface of the seat bottom frame 4. In the present embodiment, as shown in FIG. 3, 2 is provided upright from the inside of the front beam 9 that constitutes the base frame 3.
A support rod 11 is rotatably installed horizontally between the brackets 10, 10, and rollers 13 and 13 are attached to the support rod 11 to push up the seat bottom frame 4 from the lower surface and tilt up. The upper arms 12 and 12 provided are erected so as to be inclined upwards, one lower arm 14 is hung on the outer periphery of the support rod 11, and a pressing rod 15 is connected to the lower end of the lower arm 14. Also breakover arm 7
The tip of the pressure rod 15 is pivotally connected to the lower end portion 7a of the. When the seat back 1 is tilted, the actuator 8
A pressing rod 15 that moves forward in conjunction with this causes the actuator 8 to pivot upward about its pivotal portion 8a, and the roller 13 provided at the tips of the upper arms 12, 12 is attached to the lower surface of the seat bottom frame 4. The seat bottom frame 4 is brought into contact with the front portion and pushed up from the lower surface to raise the front end portion. In this embodiment, plate-shaped bearings 16 and 16 are attached to the front surface of the lower surface of the seat bottom frame 4 to form upper actuators 12 and 1 that constitute the actuator 8.
2 Smoothly contact the rollers 13, 13 provided at the tip,
The tilt-up operation is performed smoothly. Also,
A vertical arm 12, which is vertically erected on the outer circumference of a support rod 11 which is pivotally mounted between the brackets 5 and 5.
14, the seat bottom frame 4 is tilted up. However, the shape of the actuator is not particularly limited as long as the seat bottom frame 4 tilts up to perform a lever action, and the actuator has a substantially triangular shape or other shapes. Of course, can be used.

Further, the pivot position 8a of the actuator 8 can be changed in design except for the front side of the lower surface of the seat bottom frame 4. For example, if the actuator 8 is arranged near the rear portion of the seat bottom frame 4, the seat bottom frame 4 can be raised higher even if the turning distance of the actuator 8 is reduced. On the contrary, if the actuator 8 is arranged near the front part of the seat bottom frame 4, the rising intervals of the seat bottom frame 8 can be made in small increments.

4 and 5 show a pressure rod and a drive unit. The pressure rod 15 is a speed reducer of a drive unit 18 such as a motor attached to a support member 17 vertically installed at an appropriate position of the base frame 3. The gear 19 is moved back and forth through the rotation of the gear 19. The drive unit 18 is driven by remotely operating an operation unit such as a switch arranged on a side surface of an armrest or the like. The drive unit 18 is not limited to a motor, and needless to say, may be a hydraulic cylinder or the like as long as the drive unit 18 can be operated to move forward and backward by a remote operation and have the same effect as described above. Reference numerals 20 and 20 denote elastic members such as springs that are laid between the rear end of the pressure rod 15 and the support member 17.
The elastic members 20 and 20 can easily tilt up the seat bottom 6 by the pulling force when the tilting up is manually switched. Also, 21 is
It is a sensor unit that senses the position of the pressing rod 15.

Next, a method for using the seat tilt-up mechanism according to the present invention will be described with reference to FIGS. 6 (a) and 6 (b).

When the seat bottom 6 is lifted, the operating portion configured as an armrest or the like is manually operated and the push rod 15 is moved forward, so that it extends from the lower end of the breakover arm 7 configured at the lower end of the seatback frame 2. Lower end part 7
The seat back 1 is tilted rearward by pulling a toward the front. On the other hand, the pressure rod 15 that moves forward in conjunction with this rotates the actuator 8 upward, and the roller 13 provided at the tip of the upper arm 12 constituting the actuator 8 contacts the bearing 16 on the lower surface of the seat bottom frame 4. The seat bottom frame 4, which is in contact with the seat bottom frame 4 and is pivotally attached at the rear end thereof, can be tilted upwardly without moving forward.

A seat lock can be interposed between the lower end portion 7a of the breakover arm 7 and the bracket 5 standing upright from the base frame 3 side. This seat lock (not shown) can be freely expanded and contracted by appropriately operating a reclining button (not shown) to prevent the breakover arm 7 from rotating for a predetermined length. 1 can be tilted backward at a desired angle and the tilted position can be fixed.

Further, a leg rest (not shown) or a foot rest can be attached to the lower front portion of the seat bottom 6.

[Effect of device]

Since the seat tilt-up mechanism according to the present invention is configured as described above, when the seat back is reclining and tilted backward, the pressing rod that moves forward in conjunction with this tilts the actuator upward, Since the roller provided at the tip of the upper arm that constitutes the actuator contacts the bearing on the lower surface of the seat bottom frame, the seat bottom frame pivotally attached at the rear end can be tilted upward without moving forward, It has excellent practical effects after the implementation of the present invention, such as improving the habitability when using the seat.

[Brief description of drawings]

FIG. 1 is a side view showing a seat constituting a seat tilt-up mechanism according to the present invention, FIG. 2 is a side view showing a part of the seat tilt-up mechanism, which is partially cut away, and FIG. Fig. 4 is a side view showing the pressure rod and the driving machine, Fig. 5 is a front view showing the same, Fig. 6 is an explanatory view showing the operating state of the seat bottom frame, and (a) is a state before rising. FIG. 7 (b) is an explanatory view showing a state after ascending, and FIG. 7 is a side view showing a conventional seat tilt-up mechanism. 1 …… Seat back 2 …… Seat back frame 3 …… Base frame 4 …… Seat bottom frame 5 …… Bracket 8 …… Actuator, 11 …… Supporting rod 12 …… Upper arm, 13 …… Roller 14 …… Lower arm, 15 …… Pressing rod 18 …… Drive unit, 19 …… Gear

Claims (2)

[Scope of utility model registration request] 1. A rear end portion of a seat bottom frame is pivotally attached to a bracket erected on a rear portion of a base frame of a seat so that a front side of the seat bottom frame can swing up and down, and between the front portions of the base frames. The support rod is rotatably installed horizontally, and an upper arm for tilting up the seat bottom frame is tilted upright toward the front of the seat on one side of the outer circumference of the support rod, and a lower arm is provided on the other side of the lower rear of the seat. A plate-shaped bearing in which an actuator formed by erected vertically toward the base frame is rotatably attached to a base frame, and a roller formed at the tip of the upper arm of the actuator is attached to the lower front part of the seat bottom frame. The lower end of the lower arm of the actuator and the lower end of the lower arm of the actuator is pivotally attached to the lower end of the breakover arm. A tension member is connected between the rear end of the pressure rod and the base frame so that the actuator can be rotated in conjunction with the tilting movement of the seat back to raise the seat bottom frame. Tilt-up mechanism for seats, which is characterized. 2. The tilt-up mechanism for a seat according to claim 1, wherein the pressing rod is driven by rotation of a gear of a driving device provided at a lower portion of the seat bottom.