JPS6231311Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotating seat used in buses, trains, wagon-type passenger cars, etc.

A rotating seat installed in a vehicle such as a vehicle may come into contact with a wall B etc. when rotating the seat A if the center of rotation a is fixed as shown in Figure 1. It is necessary to provide a sufficient gap between the vehicle and the vehicle, but in this case there is a problem that the effective use of the space inside the vehicle is impaired.

Therefore, as shown by the imaginary line in Figure 1, some seat A is moved horizontally to move the center of rotation to point a' when rotating the seat. As shown in Figure 2, when the left and right seats face each other, the aisle width l becomes narrower, or when seat A faces window C, as shown in Figure 3, leg space cannot be secured. There was a problem.

The present invention was developed based on the above-mentioned circumstances, and its purpose is to provide a rotating seat that can prevent the vehicle from coming into contact with the walls, etc. inside the car when rotating, and that can ensure sufficient aisle width and leg space. It's about doing.

In other words, the present invention consists of a base fixed to the vehicle body, a sliding frame provided on the upper side of the base and supported so as to be slidable in the horizontal direction with respect to the base, and a sliding frame provided on the upper surface of the sliding frame. a rotating frame provided on the side and rotating in a horizontal plane; a rotating plate located between the base and the sliding frame and fixed to the rotating frame via a rotating base; It includes a cam member having two types of cam surfaces having different heights and lengths, and first and second cam followers provided on the lower surface side of the rotary plate. The first cam follower moves along the above-mentioned one cam surface when the rotating frame rotates forward, thereby rotating the rotating frame so that the seat on the rotating frame does not come into contact with the wall inside the car. It brings the seats together. The second cam follower moves the seat on the rotating frame away from the wall by moving along the other cam surface when the rotating frame is reversed.

An embodiment of the present invention will be described below with reference to FIGS. 4 to 8. In Figure 4, 1
1 is a substantially box-shaped base, and this base 1 is fixed to the vehicle body side. Further, guide rails 2, 2 are attached to both sides of the upper surface of the base 1 in parallel to each other, and these guide rails 2, 2
Slide members 3, 3 are slidably held on the respective sides.

A sliding frame 4 is attached to these sliding members 3, 3.
is fixed. A through hole 5 is formed approximately in the center of the sliding frame 4, and a plurality of lock holes 6 are provided around the same circumference around the through hole 5.
is formed. In addition, the sliding frame 4 and the base 1
A tension spring 7 is tensioned between the two and always biases the sliding frame 4 in the direction of arrow F. moreover,
A friction lock mechanism 10 is provided between a bracket 8 provided on the sliding frame 4 and a bracket 9 provided on the base 1. This friction lock mechanism 10 accommodates a torsion coil spring (not shown) inside the outer periphery 11, for example, and twists the torsion coil spring in the winding and loosening direction using an operating cable 12, thereby connecting the torsion coil spring and the rod. The frictional engagement with the rod 13 is released so that the rod 13 can freely expand and contract. The operating cable 12 is connected to a plate 30 of an operating lever 27, which will be described later.

A rotating frame 15 is rotatably supported by the sliding frame 4. This rotating frame 15 is constructed as follows. That is, 16 is a rotating frame main body formed in a substantially rectangular shape, and this rotating frame main body 16
The seat is fixed to the top side of the seat. An annular rotating base 17 is fixed to the lower surface of the rotating frame main body 16 by screws 18. This rotating base 17 is connected to the sliding frame 4.
It is rotatable relative to the support part 4a, and has a lock pin insertion hole 19 in a part thereof.

Further, a rotary plate 20 is provided below the support portion 4a. This rotary plate 20 is fixed to the rotary base 17 and the rotary frame body 16 with screws 21 . Therefore, the rotary plate 20, the rotary base 17, and the rotary frame body 16 can rotate integrally with each other. A locking mechanism 25 is provided for fixing at any rotational position. This lock mechanism 25 has a lock pin 26 that selectively fits into any one of the lock holes 6.
The lock pin 26 is pivotally connected to an operating lever 27. This operating lever 27 is pivotally attached to a bracket 28 and can swing vertically about a pivot 29. The lock pin 26 is normally urged downward by the elastic force of springs 32, 32 stretched between the plate 30 and the bracket 31.

A pair of cam followers 35 and 36, that is, a driven joint of the cam, is attached to the lower surface of the rotating plate 20. These cam followers 35, 36 are
As an example, a rotatable roller is used.

And on the base 1, the cam follower 35, 36 is installed.
A cam member 37 is provided, with which the cam member 37 makes rolling contact. This cam member 37 has two types of cam surfaces 38 and 39 having different heights. That is, the upper cam surface 38 has a substantially V-shaped slope portion 38a that is greatly hollowed out in the center thereof, and has locking recesses 38b, 38b at both ends of the slope portion 38a. . Then, on this cam surface 38, a first
The cam follower 35 is arranged to make contact with each other.

Further, the lower cam surface 39 has a substantially arc-shaped and slightly hollowed shape. A second cam follower 36 is in rolling contact with this cam surface 39. The cam followers 35 and 36 have a height difference from each other, and are configured so that they can each make rolling contact with only one cam surface, as described above.

When the rotary seat configured as described above is mounted on a bus, train, etc., the cam member 3
The base 1 is attached to the floor so that the base 7 is located on the wall side of the vehicle body.

Then, when the operating lever 27 of the locking mechanism 25 is pushed down against the repulsive force of the springs 32, 32, the friction locking mechanism 10 is operated to the unlocked state via the cable 12, so that the sliding frame 4 is moved against the guide rail. 2, 2, and the lock pins 26 are removed from the lock holes 6, so that the rotating frame 15 can freely rotate.

In this state, when the seat is rotated in the direction of arrow _f1 shown in FIG. 5, one cam follower 35 becomes a fulcrum and the other cam follower 36 moves away from the cam surface 39 as shown in FIG. , the center of rotation a moves to point a'. That is, the seat moves in the direction of arrow _f2 and rotates about a' as the center of rotation. Then, when the position of the cam follower 35 moves to the slope part 38a, the seat moves toward the wall B side under the elastic force of the tension spring 7, and the cam follower 35 moves to the most central part of the cam surface as shown in FIG. Located in a recessed area.

Therefore, since the backrest portion of the seat is close to the wall B, a sufficient space on the aisle side can be secured.

On the other hand, if you rotate the seat in the opposite direction to the above,
This time, the other cam follower 36 is connected to the other cam surface 3.
9 and one cam follower 35.
makes a movement away from the cam surface 38. Therefore, when the seat faces the wall B as shown in FIG. 8, the center of rotation moves from a to a'.
Therefore, sufficient leg space can be secured for the seat.

As described above, according to the above embodiment, two types of movement can be obtained depending on the direction of rotation of the seat, allowing a variety of uses, and even a narrow space inside the car can be used effectively.

If the operating force on the operating lever 27 is released when the seat is oriented in a desired direction, the operating lever 27 is returned to its original locked position by the springs 32, 32. Therefore, the lock pin 26 is inserted into the lock hole 6.
. . ., it becomes unrotatable and the friction lock mechanism 10 is also locked via the operating cable 12, so the sliding frame 4 also becomes immovable and the seat is fixed.

Of course, when implementing the present invention, the specific aspects such as the shape and structure of the base, sliding frame, rotating frame, cam member, cam follower, etc. can be modified in various ways.

Since the present invention is configured as described above, when the seat is turned toward the aisle, the first cam follower follows along one cam surface and the rotating frame moves in the direction of widening the aisle width. This allows the seats to move back, allowing for sufficient aisle width. Furthermore, when the seat is rotated in the opposite direction to face a window, etc., the second cam follower follows along the other cam surface and the rotating frame moves in a direction to increase the legroom, causing the seat to move backwards. Enough leg space can be secured. In this way, the seat can be moved to different positions depending on the direction of rotation, which not only prevents the seat from coming into contact with walls or windows at the same time as the rotation, but also greatly improves aisle width and legroom. It is valid. Moreover, since all of the above movements can be performed in one motion at the same time as the rotation, the seated person does not have to separately perform the rotation and lateral movement of the seat, making it easy to operate, which has great practical effects. .

[Brief explanation of the drawing]

1 to 3 are plan views showing conventional rotating seats, FIGS. 4 to 8 show an embodiment of the present invention, FIG. 4 is an exploded perspective view of the rotational movement mechanism, and FIG. 8 are plan views showing the action of the cam at different rotational positions. 1... Base, 4... Sliding frame, 15... Rotating frame,
35, 36...Cam follower, 37...Cam member, 38, 39...Cam surface.

Claims (1)

[Scope of utility model registration request] A base 1 fixed to the vehicle body side, a sliding frame 4 provided on the upper side of the base 1 and supported so as to be slidable in the horizontal direction with respect to the base 1, and the upper surface of the sliding frame 4. Rotating frame 1 provided on the side and rotating in a horizontal plane
5, a rotary plate 20 located between the base 1 and the sliding frame 4 and fixed to the rotary frame 15 via the rotary base 17; A cam member 37 having two types of cam surfaces 38 and 39 with different cam surfaces 38 and 39 is provided on the lower surface side of the rotary plate 20 and moves along one of the cam surfaces 38 when the rotary frame 15 rotates normally. A first cam follower 35 moves the seat toward the wall inside the car while rotating the rotating frame 15 so that the seat does not come into contact with the wall inside the car, and a first cam follower 35 that moves along the other cam surface 39 when the rotating frame 15 is reversed. A rotary seat characterized by comprising a second cam follower 36 that moves the seat on the rotary frame 15 in a direction away from the wall.