JPH0260533B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rotating 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. The rotating seat has a turn block equipped with a seat cushion and a seat back.
It is rotatably supported by a support block attached to the floor side, but in the case of conventional rotating seats, the rotating shaft is fixed in the center of the turn block, and the rotating shaft is rotatably supported by the support block. I was taking it.

(Problems to be Solved by the Invention) By the way, the load applied from the occupant to the seat cushion or seat back is not applied only to the center of the turn block. For this reason, in the conventional structure where the turn block is supported at one point by the rotating shaft,
The turn block would bend when seated, and in the worst case, it could break, so it was necessary to make the wall thicker. Similarly, the rotating shaft and the central portion of the support block require considerable strength, so the outer diameter and wall thickness are increased. Therefore, there are problems in that the sheet itself becomes heavy and expensive. Further, in the case of this conventional structure, there was a problem in that the turn block had a large backlash in the vertical direction unless the machining accuracy was considerably improved.

The present invention has been made in view of the above-mentioned problems, and its object is to provide a lightweight and low-cost rotating seat that does not require much strength of the turn block, the support block, and the support member equivalent to the rotating shaft. The aim is to achieve something with less directional play.

(Means for Solving the Problems) The present invention, which solves the above-mentioned problems, includes a support block that is attached to the floor side and has an annular rail part inside a central step molded part, and A turn block rotatably supported by a rail part, a rotation locking means for locking the turn block in the normal seat position and a rear facing position, a seat cushion and a seat bag disposed on the turn block; , a holder disposed near the outer edge of the support block; a fitting member disposed on the turn block that engages directly or indirectly with the holder at the normal position and rear facing position of the seat; an elastic body located above the fitting member and fitted into the holder together with the fitting member, and when the fitting member and the holder are not fitted, the lower surface of the fitting member is aligned with the bottom surface of the holder. In addition, at least one of the lower surface of the fitting member and the bottom surface of the holder is provided with an inclined surface in the fitting direction, so that when the fitting member and the holder are fitted, the elastic body It is characterized in that it is compressively deformed.

(Function) According to the rotating facing seat of the present invention, since the turn block is also supported by the fitting member and the holder in the normal position and the rotating facing position of the seat, it is not necessary to increase the plate thickness of the turn block. It is possible to obtain strong strength. Furthermore, since the load supported by the rail portion is small, the plate thickness and outer diameter of the support block and the support member can also be reduced. or,
During the rotation of the seat, the only load is the weight of the seat itself, so the holder has the minimum necessary length. Therefore, the weight of the holder and the fitting member itself is small. Furthermore, when the fitting member and the holder are fitted, the bottom surface of the fitting member always comes into contact with the bottom surface of the holder, and the elastic body on the upper side of the fitting member is compressed and deformed, so that the vertical play of the sliding member is prevented. Therefore, there is no play in the vertical direction of the sheet.

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

1 to 8 are explanatory diagrams showing one embodiment (driver's seat) of the present invention. 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 an annular shape inside the stepped molded portion at the center of the support block 1. Reference numeral 4 denotes a turn block rotatable with respect to the support block 1, which includes a pipe 5 bent into an arc shape so as to project forward, and a side plate 6 having one end fixed to the end of the pipe 5. 7, and a rear plate 8 fixed between the other ends of the side plates 6 and 7. 9 and 10 are front support hooks, and the support hooks 9 and 10 are connected to the pipe 5.
is fixed to. 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 have flat portions that are parallel to the rail portion 3 and located concentrically on substantially the same circumference, and a slider 50 made of synthetic resin is mounted here.
The upper surface of the slider 50 is brought into contact with the upper surface of the rail section 3, and the lower surface of the slider 50 is brought into sliding contact with the upper surface of the rail section 3 (see FIGS. 5 to 7). In addition, the side plate portions 9a in FIGS. 5 to 7,
10a and 53a are parts that hold the slider 50 to prevent it from wobbling in the horizontal direction; 9b and 10b;
and 53b are portions that prevent the turn bracket 4 from coming off upward from the rail portion 3. An auxiliary plate 53 is provided for the support hook 11, but this is for convenience in the assembly procedure, and is because the auxiliary plate 53 is attached to the support hook 11 after the support hooks 9 and 10 are inserted into the rail portion 3. With the above structure, turn block 4
is rotatably supported by the support block 1 as described above. The center of rotation of this turn block 4 and the center of the circular arc of the pipe 5 are:
In the case of this embodiment, it coincides with the center of the rail portion 3. Further, the radius of the arc of the pipe 5 is selected to a size that does not interfere with surrounding structures during rotation. 12 to 15 are holders of the same shape, and as shown in Fig. 8, there is a flange (vertical rising part) on the top surface.
A square cylindrical guide 51 having a slit 51c extending along its entire length in the longitudinal direction, and a synthetic resin piece 52 attached to the upper surface of the lower wall of the guide 51 to form the bottom surface of the holders 12 to 15. It is configured. In the case of this embodiment, as shown in FIG. 8C, both the guide 51 and the piece 52 are arranged so that the width in the height direction becomes narrow at the middle part in the longitudinal direction.
Slanted surfaces 51a and 52 are provided on the lower surface of the upper wall of the guide 51 and the upper surface of the piece 52 (bottom surface of the holders 12 to 15).
a are formed respectively. Further, as shown in FIG. 8A, the width of the slit 51c is set to a minimum value E at the intermediate portion in the longitudinal direction. These holders 12 to 15 are provided with slits 5 at positions concentric with the rail portion 3 on the support block 1.
They are fixed at intervals of 90° so that the direction of 1c coincides with the tangential direction of the concentric circles. Also, 16,1
Reference numeral 7 designates a fitting member consisting of a stepped pin that fits into the holders 12 and 13 when the turn block 4 is in the non-rotating position, and numerals 18 and 19 indicate fitting members consisting of stepped pins that fit into the holders 14 and 15. , fitting member 1
6 and 17 are side plates 6 of turn block 4
The fitting members 18 and 19 are fixed to the lower surface of the side plate 7. Therefore, when the turn block 4 is rotated 180 degrees, the fitting member 1
6 is attached to the holder 15, and the fitting member 17 is attached to the holder 14.
, the fitting member 18 is attached to the holder 13, and the fitting member 19 is attached to the holder 13.
are respectively fitted into the holder 12.

Here, the details of the fitting members 16 to 19 and their peripheral structures will be explained using the fitting member 16 as an example and the case where it fits into the holder 12 with reference to FIG. 1. An elastic body 55 such as rubber or a disc spring is inserted into the upper side of the fitting member 16, and a stepped cylindrical bush 56 made of synthetic resin is inserted above the elastic body 55 so as to be slidable in the vertical direction. The height of the lower surface of the sliding member 16 in the state shown in FIG.
In the present invention, the lower surface of the sliding member 16 is always set to be lower than the bottom surface of the holder 12, although this may vary depending on the shape and the like. That is, it is set so that a>O. However, it is preferable that this a is smaller than the width of the inclined surface 52a of the piece 52 in the height direction. Further, the sum L of the thickness of the large diameter portion of the fitting member 16, the thickness of the elastic body 55 in its natural state, and the slope of the flange (large diameter portion) of the bush 56 is determined in the height direction of the entrance portion of the holder 12. It is set smaller than the width H of the middle part and larger than the width h of the middle part. That is, when mated, L
The elastic body 55 is set to contract by −h to generate an elastic repulsion force. On the other hand, the outer diameter of the small diameter portion of the bush 56 (the portion that directly fits into the holders 12 to 15) is selected to be smaller than the width E of the intermediate portion of the slit 51c. In addition, the lower surface of the rail part 3 and the retaining parts 9b, 10b, 5 of the support hooks 9 to 11
The distance b (see FIG. 5) from the upper surface of 3b is selected to be slightly larger than a.

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 presser 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 link pivotally supported between the side plate 6 and auxiliary metal fittings 26 and 27 fixed to the cushion frame 21. The link 25 is used as a crank, and the concave molded parts 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
The seat cushion 20 is fitted onto the pipe 5 when it is in a flat state. With the above configuration, 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. 21a, 21b
is guided by the holding plates 23 and 24 and moves forward,
The front portion of the cushion frame 21 moves upward, and the front portion 20a of the seat cushion 20 also moves upward, as shown in FIG. 2B. When the seat cushion 20 in a flat state is rotated by 180 degrees (in the direction of the arrow in FIG. 2A), the part that interferes with surrounding structures is the front corner 20b that is farthest from the center of rotation (axis). The length of the link 25 is set so that when the front portion 20a is lifted, the front corner portion 20b can be moved to an upper non-interference position.

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 portion is attached to the protruding fitting member 32 on the bracket 36 fixed to the side plate 7 through the plate 37.
It is pivotally attached to the side plate 7 so as to be freely tiltable by passing through the through hole. Here, the reclining device 31 includes an upper arm 3 fixed to a seat back 30 (seat back frame).
3. Lower arm 3 fixed to side plate 6
4. Consists of an operating lever 35 and the like for adjusting the angle of inclination of the upper arm 33 with respect to the lower arm 34.

Reference numeral 40 denotes an operating handle for unlocking the rotation of the turn block 4, and is rotatably disposed on the side plate 7 on the back side of the seat cushion 20 with a hinge plate 41. A hook plate 42 is fixed to the middle part of the non-operating part of the operating handle 40, and a torsion spring 43 is attached to the distal end of the operating handle 40 for biasing the operating handle 40 to rotate in the locking direction (clockwise in FIG. 4). is inserted. Numerals 44 and 45 are lock holes drilled at 180° intervals on the vertical surface of the stepped molded part of the support block 1. The lock hole 45 engages with the hook plate 42 when the turn block 4 is in the rotating position (position facing the rear of the seat).

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 attached to the turn block 3.
It is in the position shown in Figure 2A, placed flat on top. Then, predetermined fitting members 16 to 19 are fitted into the holders 12 to 15, and the elastic body 55 is vertically L.
-h is compressed. Moreover, the fitting member 1
The lower surfaces of the holders 6 to 19 are pushed up by an amount a from the non-fitting position and are in a state in which they reliably abut against the bottom surfaces of the holders 12 to 15. Therefore, the sheet in this state has sufficient strength and there is no vertical play, so
By sitting down, you can drive safely. On the other hand, in order to move from this state to a state facing the rear seat, as shown in FIG. After removal, the rotation lock of the turn block 4 is released by rotating the operating handle 40 in the counterclockwise direction in FIG. 4, and the turn block 4 is rotated 180 degrees in the direction of the arrow in FIG. The rotation of the turn block 4 may be locked at that position, and the seat cushion 20 may 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. Also, in this position, predetermined fitting members 16 to 19 fit into the holders 12 to 15. Therefore, by sitting on the seat in this state, the user can comfortably 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,
Operate the rotation lock of turn block 4. Handle 4
0, turn the turn block 4 180 degrees in the opposite direction to the arrow direction in Fig. 2A, lock the rotation of the turn block 4 at that position, and place the seat cushion 20 flat on the turn block 4. Just place it.

Note that the present invention is not limited to the above embodiments, and various modifications are possible. For example, the present invention is applicable not only to front seats but also to rear seats. Also, the bush 56 is omitted and the fitting member 1
The outer diameter of the part that directly fits with the slits 51c of 6 to 19 is the width of the slit 51c (longitudinal middle part) E.
It may be selected to be slightly smaller. Further, although the bottom surfaces of the holders 12 to 15 are provided with sloped surfaces, the bottom surfaces of the fitting members 16 to 19 may be provided with sloped surfaces in the sliding direction.

(Effects of the Invention) As explained above, in the present invention, the turn block is also supported by the fitting member and the holder in the normal position of the seat and the rotating facing position, so there is no need to increase the plate thickness of the turn block. can also provide sufficient strength. Furthermore, since the load supported by the rail portion is small, the plate thickness and outer diameter of the support block and the support member can also be reduced. or,
During the rotation of the seat, the only load is the weight of the seat itself, so the holder has the minimum necessary length. Therefore, the weight of the holder and the fitting member itself is small. Furthermore, when the fitting member and the holder are fitted, the bottom surface of the fitting member always comes into contact with the bottom surface of the holder, and the elastic body on the upper side of the fitting member is compressed and deformed, so that the vertical play of the sliding member is prevented. Therefore, there is no play in the vertical direction of the sheet.

[Brief explanation of the drawing]

1 is an explanatory diagram of the holder and fitting member in the embodiment of FIG. 4, FIG. 2 is an explanatory diagram of the operation during rotation of the seat in the embodiment of FIG. 4, and FIG. FIG. 4 is an exploded perspective view showing essential parts of an embodiment of the present invention; FIGS. 5 to 7 are explanatory diagrams of the support hook and slider; FIG. The figure is a detailed explanatory diagram of the holder. 1...Support block, 2...Seat track,
3...Rail part, 4...Turn block, 5...Pipe, 6, 7...Side plate, 8...Rear plate, 9-11...Support hook, 12-15...Holder, 16-19...Fitting member, 20...Seat Cushion, 21... Cushion frame, 23, 24
...Press plate, 25...Link, 30...Seat back,
31... Reclining device, 40... Operation handle, 41... Hinge plate, 42... Hook plate, 44, 45... Lock hole, 50... Slider, 5
1... Guide, 52... Piece, 55... Elastic body, 56
...butsuyuu.

Claims (1)

[Claims] 1. A support block that is attached to the floor side and has an annular rail section inside a central stepped molded section, a turn block that is rotatably supported by the rail section of the support block, and a turn block that is rotatably supported by the rail section of the support block. a rotation locking means for locking the seat in the normal position and the rear facing position; a seat cushion and a seat back disposed on the turn block; a holder disposed near the outer edge of the support block; a fitting member disposed on the seat and directly or indirectly fitting with the holder at the normal position and rear facing position of the seat; and a fitting member located above the fitting member and fitting into the holder together with the fitting member. an elastic body, and when the fitting member and the holder are not fitted, the bottom surface of the fitting member is set to be lower than the bottom surface of the holder, and the bottom surface of the fitting member and the holder are set to be lower than the bottom surface of the holder. 1. A rotating seating seat, characterized in that at least one bottom surface of the rotating seat is provided with an inclined surface in a fitting direction, so that the elastic body is compressively deformed when the fitting member and the holder are fitted.