JP2588538Y2 - Rotating seat for vehicles - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating seat for a vehicle.

[0002]

2. Description of the Related Art As one type of vehicle seat, as shown in FIGS. 3 and 4, a base plate 10 fixed to a vehicle body floor, a ring-shaped lower rail 11 fixed to the base plate 10, and rotatable along the vehicle body floor. A ring-shaped upper rail 12 attached to the lower rail 11.
A rotating seat having a seat body mounted on the upper rail 12 is practically used.

In such a rotary seat, a plurality of lock plates 13 are fixed to a base plate 10, and a lock lever 14 is attached to an upper surface of an upper rail 12 by hinge pins 15.
The lock pin 16 provided at the inner end of the lock lever 14 is removably engaged with the engagement concave portion of the lock plate 13 by the rotation operation of the lock lever 14 to rotate the upper rail 12. It is configured to lock.

[0004]

In the above-described conventional rotary seat for a vehicle, the lock plate 13 and the lock pin 16 are provided.
, The rotation of the seat body must be rotated each time the seat body is rotated, and the locking position of the seat body is Since it is determined by the installation position, it cannot be locked at an arbitrary position.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a vehicular rotary seat that can rotate a seat body by a simple operation and can lock the rotation of the seat body at an arbitrary position.

[0006]

According to the present invention, a ring-shaped upper rail on which a seat body is installed is fixed to a vehicle body floor.
A revolving seat for a vehicle that is rotatably mounted along the floor on a ring-shaped lower rail, with a screw shaft that is rotatably mounted on a bracket that is arranged along the vehicle body floor and fixed to the floor, and reciprocates on a screw shaft A nut bracket that can be screwed together, a guide plate that has a long hole and is integrally connected to the nut bracket, and the inner end is fixed to the center of rotation of the rail so that it rotates integrally with the upper rail, and is attached to the outer end. It is characterized by comprising a link bracket in which the provided fitting protrusion is fitted in the elongated hole so as to be slidable in the longitudinal direction, and a motor for driving the screw shaft.

[0007]

According to this structure, when the motor is driven to rotate the screw shaft, the nut bracket is screwed along the screw shaft, and the guide plate is formed integrally with the nut bracket along the vehicle body floor. Retreat. Accordingly, the fitting projection provided at the outer end of the link bracket slides along the elongated hole of the guide plate, and the link bracket rotates around the inner end as a fulcrum. Since the inner end is fixed to the rotation center of the upper rail, the rotation of the link bracket causes the upper rail and the seat body installed on the rail to rotate along the lower rail.

When the motor is stopped, the rotation of the upper rail stops, the seat body stops at an arbitrary rotation position, and the rotation is locked by frictional resistance inside the speed reduction mechanism and frictional resistance between the screw shaft and the nut bracket.

Thus, according to the present invention, the seat body can be rotated or locked at an arbitrary rotational position only by controlling the energization of the motor by operating the switch, so that the operability is greatly improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a vehicular rotating seat according to an embodiment of the present invention. The rotating seat includes a seat leg 20 fixed to the vehicle body floor F and a seat leg 2.
A base plate 22 fixed to the bracket 21 welded to 0 with bolts and nuts, a ring-shaped upper rail 23 attached to the base plate 22, and a drive unit 40 fixed to the vehicle body floor, and the seat body S is installed on the upper rail 23. Is fixed.

As shown in detail in FIG. 2, the base plate 22 is installed substantially parallel to the vehicle body floor F by a seat leg 20, and a ring-shaped lower rail 24 having a U-shaped cross section is fixed to the upper surface thereof by rivets. ing. The lower rail 24 is provided with the shaft 2 at regular intervals along the circumferential direction.
6 is attached. This shaft 26 is a lower rail 2
Rollers 27 and 28 are attached to both end portions and an intermediate portion, respectively. The upper rail 23 is attached to the lower rail 24 such that the inner surface thereof is in sliding contact with the rollers 27 and 28, and can be rotated along the lower rail 24.

Four brackets 29 and one frame 30 are welded to the upper surface of the upper rail 23, and the seat body S is fixed to the bracket 29 by bolts and nuts (not shown). The frame 30 is provided along the diameter direction of the upper rail 23, and has a through hole 30a at a position corresponding to the center of rotation of the upper rail 23. This through hole 3
A bolt 32 welded and fixed to the inner end of the link bracket 31 is inserted through 0 a, and is integrally fastened to the frame 30 with a double nut 33.

The drive unit 40 includes two base frames 41 fixed to the vehicle body floor F, and a screw shaft 4 provided along the vehicle body floor inside each base frame 41.
A guide plate 43 supported by two or two screw shafts 42 and a motor 44 are provided. The screw shaft 42 is rotatably mounted on the frame 41 by a bracket 45 and a gear box 46 welded to the base frame 41, and is drivingly connected to a motor 44 via a transmission shaft 47 and a gear box 46. A plurality of gears constituting a reduction mechanism are built in the gear box 46. At both ends of the guide plate 43, nut brackets 48 screwed to the screw shaft 42 so as to be able to advance and retreat are integrally fixed. On the other hand, a stopper ring 49 for limiting a moving range of the nut bracket 48 is fixed to the screw shaft 42. The guide plate 43 has a long hole 43a formed therein.
A roller 50 having a flange is fitted slidably in the longitudinal direction. This roller 50 is used for the link bracket 31.
Is rotatably mounted to the outer end of the first member by a bolt 51, a bush 52 and a nut 53.

In this embodiment, when a switch (not shown) is operated to energize the motor 44, the screw shaft 42 is rotated, and the nut bracket 48 is screwed along the shaft 42, and is integrated therewith. The guide plate 43 advances and retreats along the vehicle body floor F. Accordingly, the roller 50 provided at the outer end of the link bracket 31
Slides along the long hole 43a of the guide plate 43, so that the link bracket 31 is fixed to the inner end of the bolt 3
It turns around 2 as a fulcrum. Since the inner end is fixed to the center of rotation of the upper rail 23 with a bolt 32 and a double nut 33, the rotation of the link bracket 31 causes the upper rail 23 to rotate along the lower rail 24, and the seat body S to also rotate.

When the motor 44 is stopped, the upper rail 2
3, the rotation of the seat body S is stopped at an arbitrary rotation position, and the rotation is locked by the frictional resistance between the gear trains in the gear box 46 and the frictional resistance between the screw shaft 42 and the nut bracket 48.

According to the present embodiment, the seat body S can be rotated or rotated at any rotational position only by controlling the energization of the motor 44 by a simple and easy switch operation .
Tsu can click, operability is greatly improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a vehicle rotating seat according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a plan view showing a rotating mechanism of a conventional rotating seat for a vehicle.

FIG. 4 is a sectional view taken along line 4-4 in FIG. 3;

[Explanation of symbols]

Reference numeral 20: seat leg, 21: bracket, 22: base plate, 23: upper rail, 24: lower rail, 2
5 rivets, 26 shafts, 27, 28 rollers,
29 bracket, 30 frame, 31 link bracket, 32 bolt, 33 double nut, 40 drive unit, 41 base frame, 42 screw shaft, 43 guide plate, 44 motor, 45
... Bracket, 46 ... Gear box, 47 ... Transmission shaft, 48 ... Nut bracket, 49 ... Stopper ring,
50 ... roller, 51 ... bolt, 52 ... washer, 53 ...
Nut, F: body floor, S: seat body.

Claims (1)

(57) [Scope of request for utility model registration] 1. A swivel seat for rotatably assembled vehicle along a seat body and installed a ring-shaped Appare <br/> Lumpur the same floor in a ring-shaped lower rail fixed to the vehicle floor, the vehicle floor A screw shaft that is rotatably assembled to a bracket that is arranged along the floor and fixed to the floor, a nut bracket that is screwed to the screw shaft so that it can advance and retreat, and a guide plate that has a long hole and is integrally connected to the nut bracket A link bracket having an inner end fixed to the rotation center of the rail so as to rotate integrally with the upper rail, and a fitting protrusion provided at the outer end fitted to the elongated hole so as to be slidable in the longitudinal direction. And a motor for driving the screw shaft.