JPH0577538B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rotating body seat that can face a rear seat by rotating the seat.

(Prior Art) The popularity of cars has been remarkable in recent years, and as a result, cars are required not only to be used for simply transporting people and goods, but also to have a structure that allows people to enjoy conversations inside the car. The rotating seat meets this demand. By the way, conventional rotating seats mainly have the second-row rear seat facing the third-row rear seat of a one-box car, and there is no structure around it to prevent rotation, so in such cases It is relatively easy to design a rotating seat in a car, and cars using this are actually produced.

In addition, as shown in FIG. 4, the conventional rotary seating seat has a seat back d tiltably attached to a cushion frame b of a seat cushion a via a reclining device c, etc. ) A turn block f is rotatably arranged with respect to a support block e fixed to the cushion frame b, and the cushion frame b is fixed to the turn block f. It was a structure that was added to frame b.

(Problem to be Solved by the Invention) By the way, in a normal passenger car (sedan car), as shown in Fig. 5, there is a console box h and a shift lever i between the front seat driver's seat DR and passenger seat PA. , a parking brake lever j, a seatbelt mounting bracket (not shown), and other structures are protruded, and the seat cushion interferes with these when attempting to rotate the seat. Therefore, in order to convert the front seats of normal passenger cars into rotating seats, it is considered essential to lower the surrounding structures or move them to other positions at the expense of maneuverability. In passenger cars, the front seats were not designed to rotate.

Further, in the case of the conventional rotating seat, the load applied to the cushion frame is large, so the cushion frame requires considerable strength, resulting in the problem that the cushion frame is large and heavy.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to enable a rotating seat that can be used as a front seat of a normal passenger car without making design changes that sacrifice the operability of surrounding structures. The goal is to realize the seat.

Still another object of the present invention is to realize a rotating seat with a simple structure in which the cushion frame can be made small and lightweight.

(Means for Solving the Problems) The present invention, which solves the above problems, includes a support block attached to the floor, a front frame portion bent in an arc shape so as to project forward;
The annular frame includes a side frame portion having one end fixed to the end of the front frame portion and having an inwardly projecting portion, and a rear frame portion fixed between the other ends of the side frame portion. A turn block rotatably provided with respect to the support block, a seat back tiltably attached to the rear of the turn block via a reclining device and a hinge member, and a frame line only for shape retention. It consists of a cushion frame, at least the side and front peripheral edges are placed on the upper surface of the annular frame of the turn block, and the front part, which is the part that interferes with surrounding structures, moves to an upper non-interference position. and a seat cushion attached to the turn block so as to be tiltable up to .

(Function) In the rotating seat of the present invention, since the portion of the seat cushion that interferes with the surrounding structures can be lifted to a non-interfering position, the seat can be rotated without interfering with the surrounding structures during rotation. Furthermore, since the seat bag is attached to the turn block, the load applied to the seat bag is not applied to the cushion frame, and since the seat cushion is supported at least on the side and front peripheral edges by the annular frame of the turn block, the seat cushion is No large bending stress is applied to the sion frame. Therefore, the strength of the cushion frame can be significantly reduced, and the cushion frame only needs a frame to maintain its shape, making it possible to make the cushion frame smaller and lighter.

(Example) Hereinafter, an example of the present invention will be described in detail using the drawings.

Figures 1 to 3 are explanatory diagrams showing one embodiment (driver's seat) of the present invention, and in these figures, 1 is a support attached to the floor of the vehicle body (not shown) via a seat track 2. A rail portion 3 is provided in the center of the support block 1 in an annular shape. Reference numeral 4 denotes a turn block rotatable with respect to the support block 1, which has a pipe (front frame part) 5 bent into an arc shape so as to project forward, and an inward projecting part, and has an end of the pipe 5. side plates (side frame portions) 6 and 7 having one end fixed to the portion;
It consists of a rear plate (rear frame portion) 8 fixed between the other ends of the side plates 6 and 7. Reference numerals 9 and 10 denote front support hooks, and the support hooks 9 and 10 are fixed to the pipe 5. Reference numeral 11 denotes a rear support hook, which is molded integrally with the rear plate 8. The lower end portions of the support hooks 9 to 11 are located on substantially the same circumference concentrically with the rail portion 3 and engage with the upper surface of the rail portion 3 via a slider (not shown). is rotatably supported by the support block 1 as described above. The center of rotation of the turn block 4 and the center of the arc of the pipe 5 coincide with the center of the rail portion 3 in this embodiment. Further, the radius of the arc of the pipe 5 is selected to a size that does not interfere with surrounding structures during rotation. Reference numerals 12 to 15 denote guides having a rectangular cross section with slits, which are fixed at 90° intervals on the support block 1 at positions concentric with the rail section 3 so that the direction of the slits coincides with the tangential direction of the concentric circle. has been done. Also, 16,1
7 is a stepped pin that fits into the guides 12 and 13 when the turn block 4 is in the non-rotating position;
Reference numerals 8 and 19 indicate stepped pins that fit into the guides 14 and 15. The pins 16 and 17 are fixed to the lower surface of the side plate 6 of the turn block 4, and the pins 18 and 19 are fixed to the lower surface of the side plate 7. Therefore, when turn block 4 is rotated 180°,
pin 16 and guide 15, pin 17 and guide 14,
Pin 18 and guide 13, pin 19 and guide 12
However, they will mesh with each other. This pin 16
19 and the guides 12 to 15 are provided because the support hooks 9 to 11 alone may be difficult to withstand the load applied to the seat. This is to aim for.

20 is a seat cushion on which a passenger is seated, 21
is a substantially rectangular cushion frame supporting the seat cushion 20;
1 is attached to the turn block 4 so as to be able to lift the front portion 20a of the seat cushion 20. Specifically, the two concave molded portions 21a and 21b at the rear of the cushion frame 21 are supported by retaining plates 23 and 24 bent into a substantially U-shape.
It is attached to the side plates 6, 7 so as to be slidable and rotatable in the front and rear directions. Reference numeral 25 denotes a ring pivotally supported between the side plate 6 and the auxiliary metal fittings 26 and 27 fixed to the cushion frame 21. The link 25 is used as a crank, and the concave forming portions 21a and 2
1b forms a slider crank mechanism with a slider, and 28 is a cushion frame 21.
A fitting member with a substantially C-shaped cross section fixed to the front part of the
When the seat cushion 20 is in a flat state, it fits into the pipe 5. With the above configuration, at least the lateral and front peripheral edges of the seat cushion 20 are supported by the annular frame of the turn block 4. When an upward force is applied to the front portion 20a of the seat cushion 20, the link 25 rotates counterclockwise and rises as shown in FIG. 21b is guided by the holding plates 23 and 24 and moves forward, and the cushion frame 21
The front portion of the seat cushion 20 moves upward, and the front portion 20a of the seat cushion 20 also moves upward, as shown in FIG. 2B. Seat cushion 2 in flat state
When rotating 0 by 180° (in the direction of the arrow in Figure 2 A), the part that interferes with surrounding structures is the center of rotation (axis).
The length of the link 25 is set so that the front corner 20b, which is the farthest from the front corner 20b, can be moved upward to a non-interfering position when the front part 20a is lifted.

30 is a seat bag tiltably attached to the turn block 4. That is, seat bag 3
One lower corner of the reclining device 31
The other lower corner is tilted to the side plate 7 by inserting the protruding pin 32 of the bracket 36 fixed to the side plate 7 into the through hole of the plate 37. It is pivoted freely. Here, the reclining device 31 includes an upper arm 33 fixed to the seat back 30 (seat back frame), a lower arm 34 fixed to the side plate 6, and an operating lever 35 for adjusting the inclination angle of the upper arm 33 with respect to the lower arm 34. Consists of etc.

Although not shown, a lock mechanism for locking the rotation of the turn block 4 is provided between the turn block 4 and the support block 1. This locking mechanism can be applied, for example, to support block 1.
Lock holes (normal position lock hole and opposite seat position lock hole) are drilled with an interval of 180° (the center is the rotation center O), and a turn is made to selectively fit the hook plate into the lock hole. It is composed of an operating handle provided on the block 4.

Next, the operation of the rotating seat having the above configuration will be explained.

When this seat is in a normal state, that is, facing forward, the seat cushion 5 is connected to the turn block 4.
It is in the position shown in Figure 2A, placed flat on top. Therefore, by sitting on the seat in this state, driving etc. can be performed. On the other hand, in order to move from this state to a state facing the rear seat, as shown in FIG. After removing it, release the rotation lock of the turn block 4 using the operating handle, rotate the turn block 4 180° in the direction of the arrow in Fig. 2A, lock the rotation of the turn block 4 at that position, and remove the seat cushion. 20 can be placed flat on the turn block 4 again. As a result, the seat back 30 naturally moves forward, so that the front seat faces the rear seat. Therefore, by sitting on the seat in this state, the user can talk face-to-face with the occupant in the rear seat. After this, in order to drive the car, it is necessary to turn the seat forward again, but in that case, the operation can be performed in the opposite manner to the above. That is, the front part 20a of the seat cushion 20 is lifted again,
Unlock the rotation of the turn block 4 using the operating handle, rotate the turn block 4 180 degrees in the direction opposite to the direction of the arrow in Fig. 2A, lock the rotation of the turn block 4 at that position, and remove the seat cushion. 20 may be placed flat on the turn block 4.

In the case of the above rotating seat, the seat back is 30
Since the load applied to the seat cushion 20 is not applied to the cushion frame 21, and the annular frame of the turn block 4 supports at least the lateral and front peripheral edges of the seat cushion 20, the strength of the cushion frame 21 can be greatly increased. As shown in FIG. That is, the cushion frame can be made smaller and lighter, the structure of the seat itself can be simplified, and the force required to rotate the seat can be reduced.

Note that the present invention is not limited to the above embodiments, and various modifications are possible. For example, the present invention can be applied not only to the front seat but also to the rear seat, and the movement of the seat cushion 20 may be a parallel movement instead of a tilting movement.

(Effects of the Invention) As explained above, in the present invention, since the part of the seat cushion that interferes with the surrounding structures can be lifted to a non-interfering position, the seat can be rotated without interfering with the surrounding structures during rotation. can. Also, since I attached the seat bag to the turn block,
The load applied to the seat bag is not applied to the cushion frame, and since the seat cushion is supported at least at its lateral and front peripheral edges by the annular frame of the turn block, no large bending stress is applied to the cushion frame. Therefore, the strength of the cushion frame can be significantly reduced.
The cushion frame only needs a frame to maintain its shape, and the cushion frame can be made small and lightweight.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing the main parts of an embodiment of the present invention, FIG. 2 is an explanatory diagram of the operation of the seat during rotation according to the present invention, and FIG. 3 is a diagram of the seat in the embodiment of FIG. 1. FIG. 4 is an explanatory diagram of the operation during lifting, FIG. 4 is an explanatory diagram of a conventional rotating seat, and FIG. 5 is an explanatory diagram of the front seat of a passenger car and its surrounding structures. 1... Support block, 2... Seat track, 3... Rail section, 4... Turn block, 5
...Pipe, 6,7...Side plate, 8...
Rear plate, 9-11...Support hook, 1
2-15...Guide, 16-19...Stepped pin,
20... Seat cushion, 21... Cushion frame, 23, 24... Presser plate, 25... Link, 30... Seat back, 31... Reclining device.

Claims (1)

[Claims] 1. A support block attached to the floor;
A front frame portion bent into an arc shape so as to protrude forward, a side frame portion having one end fixed to the end of the front frame portion and having an inwardly projecting portion, and the other side frame portions. It has an annular frame consisting of a rear frame portion fixed between ends, a turn block rotatably provided with respect to the support block, and tiltable to the rear of the turn block via a reclining device and a hinge member. It consists of a seat bag attached to the turn block, and a cushion frame with only a frame line to maintain its shape, and at least the side and front peripheral edges are placed on the upper surface of the annular frame of the turn block, and it is in contact with surrounding structures. a seat cushion attached to the turn block so that the front part, which is an interference part of the seat cushion, can be tilted until it moves to an upper non-interference position.