JPH0537Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a rotatable seat for use in vehicles, etc., which can change direction.

[Conventional technology]

Conventionally, this type of rotating seat has a rotating disk fixed to the underside of the seat cushion, and a circumferential guide rail with a U-shaped cross section attached to the floor of the vehicle body or a seat adjuster fixed to the floor. The seat cushion is rotatably supported on the floor by engaging and sliding the periphery of the rotating disk on the seat cushion side, and by a locking member interposed between the rotating disk and the circumferential guide rail. It is configured so that it can be locked at a predetermined rotational position and seated in a normal state at a direction change position.

[Problem that the invention attempts to solve]

The rotating seat constructed in this way is designed to be fixed to the floor without wobbling in the normal sitting state, by connecting the peripheral surface of the rotating disk on the seat cushion side and the circumferential guide rail on the floor side. It is necessary to maintain the inner surface in close contact with the inner surface, and as a result, there is a large frictional resistance when the rotary disk rotates with respect to the circumferential guide rail, causing problems such as lack of smoothness in the rotation of the seat, and the guide rail is completely closed. Since it is provided around the circumference, it is heavy and puts a burden on the vehicle body.

In view of the above, the present invention provides a rotating seat for a vehicle, etc., which does not wobble in the normal seating state, can rotate smoothly when changing direction, and can reduce weight.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention is such that a movable frame fixed to the bottom side of the seat has a circular guide hole penetrating approximately in the center, and the movable frame is fixed to the floor side corresponding to the movable frame. A plurality of rollers with upper and lower flanges provided on the base plate are inscribed in the circular guide hole of the movable frame, and are supported rotatably in the same direction as the movable frame so that the upper and lower flanges sandwich the periphery of the circular guide hole. The movable frame is rotated with respect to the base plate via rollers to change the direction of the sheet in any direction.

[Action]

With this configuration, when the movable frame is rotated relative to the base plate to change the direction of the sheet, the rollers themselves are also rotated in the same direction as the rotation direction of the movable frame, thereby preventing the movable frame from rotating. It is done smoothly.

Furthermore, the upper and lower flanges of the rollers supported by the base plate sandwich the peripheral edge of the circular guide hole of the movable frame, thereby preventing the movable frame from detaching from the base plate and preventing rattling.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 indicates a seat consisting of a seat cushion 1c and a seat back 1b, and 2 indicates a seat adjuster consisting of left and right rail members 2a, 2b and a lock member 2c fixed to the floor surface F of the vehicle body.
This seat 1, that is, the lower surface side of the seat cushion 1c, the seat adjuster 2, that is, the rail member 2a,
A seat rotation device 3 is interposed between upper rails 2a ₁ and 2b ₁ of 2b.

This seat rotation device 3 rotates the seat cushion 1.
A movable frame 4 fixed to the lower side of c, a base frame 5 fixed between both upper rails 2a ₁ and 2b ₁ of the seat adjuster 2, and a roller 6 disposed on the base frame 5 and rolled in contact with the movable frame 4. The movable frame 4 has a circular guide hole 4a punched out in the center, and both sides are bent into steps, and side end surfaces 4b, 4 are bent downward at both ends.
c is formed. And this movable frame 4
A collar 7 is penetrated and fixed to approximately the center of one side end surface 4b, and a locking pin 8 with a knob is slidably inserted thereinto, and a pin 9 is attached to the inner end of the locking pin 8.
A compression coil spring 1 is inserted between the washer 10 and the inner end flange 7a of the collar 7.
1 is interposed to constantly slide and bias the locking pin 8 inward.

The base plate 5 is a side end surface 4 of the movable frame 4.
It has a drawn circular shape with a diameter smaller than the distance between b and 4c, and its outer periphery is bent into a groove shape to form a rising flange 5a on the outer edge. Front and rear parts 3
Lock holes 5b, 5b ₁ , 5b ₂ , 5b ₃ into which the tips of the locking pins 8 described above are inserted and engaged are bored in the parts, and a plurality of lock holes are formed on the upper surface of the base plate 5.
For example, three rollers 6, 6 ₁ , 6 ₂ , 6 ₃ are pivotally supported.

This roller 6 is attached to the above-mentioned movable frame 4 above and below.
Flanges 6a and 6b are provided at intervals slightly wider than the peripheral wall thickness of the circular guide hole 4a, and a large number of balls 12 are provided on the inner surface of the lower flange 6b over the entire circumference.
is buried so that it can roll freely with a part thereof exposed, and a shaft hole 6c is provided through the shaft core of the roller 6. The roller 6 is inserted between the upper and lower flanges 6a, 6b around the circumference of the circular guide hole 4a of the movable frame 4, and in this state, the shaft insertion holes 5c, 5c are bored at predetermined positions on the upper surface of the base plate 5, that is, in the upper surface. ₁ , 5c ₂ , 5c ₃ ,
Nuts 13, 13 ₁ , 13 ₂ , 1 are provided on the upper surface side of the roller 6 in correspondence with the shaft insertion hole 5c of the base plate 5.
Place the presser plate 14 to which 3 ₃ is fixed, and insert the bolts 15, 15 ₁ ,
15 ₂ , 15 ₃ are inserted into the shaft hole 6 c of the roller 6 through the shaft insertion hole 5 c and the nut 13 of the presser plate 14 is inserted.
Screw and tighten.

In this way, the movable frame 4, the base plate 5, and the roller 6 are combined to form the rotating device 3. The movable frame 4 and the base plate 5 are rotatable with respect to each other, and the locking pin 8 on the movable frame 4 side is locked to the base plate 5. Both are integrated by insertion and engagement into the hole 5b.

In this rotating device 3, a movable frame 4 is fixed to the lower surface of the seat cushion 1c with bolts 16, and a base plate 5 is fixed to both upper rails 2a ₁ and 2b ₁ of the seat adjuster 2 with bolts 17.

In the normal seating position of the seat 1 with the rotation device 3 interposed between it and the seat adjuster 2, the tip of the locking pin 8 on the movable frame 4 side is located in one of the lock holes 5b of the base plate 5, as described above. For example, the locking pin ₈ is inserted into and engaged with the base plate 5b1 of the movable frame 4, and in this state, the locking pin 8 is slid inward by the elastic force of the compression coil spring 11, and the base plate 5 of the movable frame 4 is
The seat adjuster 2 is integrated with the seat adjuster 2 and fixed to the floor F side of the vehicle body.

In this state, hold the locking pin 8 by its knob and pull it against the elastic force of the compression coil spring 11.
By removing the tip from the lock hole _5b1 of the base plate 5, the lock of the movable frame 4 to the base plate 5 is released, and the seat 1 becomes rotatable. When the tip of the locking pin 8 is fitted into the other locking hole _5b2 of the base plate 5, the locking pin 8 is slid by the elastic force of the compression coil spring 11, and its tip is inserted and engaged with the locking hole _5b2 , and the movable frame is closed. 4 is locked to the base plate 5 again, and the seat 1 is fixed to the floor F side of the vehicle body in a horizontal state.

In this way, the seat 1 can change direction with respect to the vehicle floor.

In the above direction changing operation of the sheet 1, the rotation of the movable frame 4 with respect to the base plate 5 is caused by the peripheral edge of the circular guide hole 4a slidingly contacting the roller 6 which is pivotally supported on the base plate 5 side.
The motion is rotated on its own axis, and the ball 12 is rolled, so that the motion is extremely smooth, and can be carried out even while seated on the seat 1 with almost no resistance.

In the above configuration, the roller 6 is pivotally attached to the lower surface of the movable frame 4 fixed to the lower surface of the seat cushion 1c, and the circular guide is slidably engaged with the roller 6 on the base plate 5 fixed to the seat adjuster 2. Even if a hole is formed, the operation is the same as described above.
In this case, the ball 12 is embedded in the inner surface of the upper flange 6a of the roller 6 so as to be freely rollable.

Note that the base plate 5 may be directly fixed to the floor surface F, and the structure and shape of other members are not limited to those shown in the drawings, and may be modified as appropriate without departing from the gist of the present invention. be.

[Effect of idea]

As described above, according to the present invention, a circular guide hole is formed in the movable frame fixed to the bottom side of the seat, and a plurality of rollers each having upper and lower flanges are attached to the base plate fixed to the floor side. The movable frame is configured to be inscribed in the circular guide hole and rotatably supported in the same direction as the movable frame by inserting the peripheral edge of the circular guide hole between the upper and lower flanges, so that the movable frame can be rotated with respect to the base plate. During this rotation of the movable frame, the rollers are also rotated in the same direction as the movable frame, and the sliding resistance between the movable frame and the base plate is extremely small. The seat is inserted between the upper and lower flanges to prevent it from separating from the base plate, and also prevents rattling, allowing the seat to rotate smoothly relative to the floor, making it easy to change direction in the desired direction. Since a guide rail that slides over the entire circumference is not used, the structure is simplified, the weight can be reduced, and it is also advantageous in terms of cost.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of an example of a rotary seat according to the present invention, FIG. 2 is an enlarged sectional view of a main part of the rotary seat, and FIG. 3 is a plan view of the rotary seat in a state where the direction is changed. In the figure, 1 is the seat, 1c is the seat cushion, and 2
is a seat adjuster, 4 is a movable frame, 4a is a guide hole, 5 is a base plate, 6, 6 ₁ , 6 ₂ ,
₆₃ is a roller, 6a and 6b are flanges, and F is a floor surface.

Claims (1)

[Claims for Utility Model Registration] A movable frame fixed to the lower side of the seat has a circular guide hole formed approximately in the center thereof, and a base plate fixed to the floor side corresponding to the movable frame has upper and lower flanges. A plurality of rollers provided with the movable frame are inscribed in the circular guide hole of the movable frame, and are rotatably supported in the same direction as the movable frame by sandwiching the peripheral edge of the circular guide hole between the upper and lower flanges. A rotating seat for a vehicle, etc., characterized in that the movable frame is rotated with respect to the base plate via the roller to change the direction of the seat.