JPH0139232Y2 - - Google Patents

Description

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

[Conventional technology]

BACKGROUND ART If the center of rotation of a rotating seat mounted on a vehicle such as a vehicle is fixed, the seat may come into contact with a wall or the like when the seat is rotated. For this reason, it is necessary to ensure a sufficient gap between the seat and the wall, but in this case, the effective use of the space inside the vehicle is impaired.

Therefore, some conventional rotating seats are designed so that when the seat is rotated, the seat is moved to the aisle side while rotating. However, in this case, the first
The aisle width l becomes narrower when the left and right seats A face each other, as shown in Figure 0, or there is sufficient leg space when seat A faces toward the window B, as shown in Figure 11. There were problems such as not being able to secure it.

In order to solve the above-mentioned drawbacks, the present applicant has developed a rotating seat device as disclosed in Utility Model Application No. 57-24541 (Utility Model Application No. 58-126533). This prior art includes a base, a sliding frame supported slidably in the horizontal direction with respect to the base, a rotating frame attached to the sliding frame and rotating in a horizontal plane, and the base or a cam member provided on either one of the rotating frames and having two types of cam surfaces having different heights;
A pair of cam followers are provided on the other side and are in contact with each of the cam surfaces, respectively, and move along different cam surfaces when the rotating frame rotates in the forward direction and in the reverse direction.

According to this rotating seat device, by appropriately setting the shapes of the two cam surfaces, it is possible to prevent the seat from coming into contact with a wall or the like during rotation, and two types of lateral movement can be achieved depending on the direction of rotation. This allows for wider aisles and wider foot space.

[Problem that the invention attempts to solve]

However, in the above-mentioned prior art, since a stepless locking device is used to lock the lateral movement of the seat, when the seat is moved to the aisle side after the rotational movement is completed, the seat is seated at a position closer to the aisle side. This means that you can lock the In other words, the seats are fixed in a state where the aisle width is narrower than necessary, and a problem remains in securing the aisle width.

[Means for solving problems]

The rotating seat device of the present invention includes a base, a sliding frame supported to be slidable in the horizontal direction with respect to the base,
A rotating frame attached to the sliding frame and rotating in a horizontal plane, a cam member provided on either the base or the rotating frame and having two types of cam surfaces with different heights, and a cam member provided on the other side. a cam follower that is in contact with each of the cam surfaces and moves along different cam surfaces when the rotating frame rotates forwardly and in reverse; a return spring that biases the sliding frame toward the window; and a return spring that biases the sliding frame toward the window. The present invention is characterized by comprising a stepped lateral movement locking mechanism capable of locking the lateral position of the sliding frame relative to the base only when the rotational movement of the seat is completed.

[Effect]

In the rotating seat device having the above configuration, by appropriately setting the shape of the cam surface, the cam follower moves along one cam surface when the seat is turned toward the aisle.
The rotating frame can be moved in the direction of widening the passage width. When the seat is rotated in the opposite direction to face the window, the cam follower moves along the other cam surface, and the rotating frame moves away from the window, allowing the seat to be moved toward the aisle.

According to the above configuration, even if an attempt is made to consciously move the seat laterally (toward the aisle) after the rotational movement is complete, the seat will not be fixed in the aisle position, and the repulsive force of the return spring will eventually result. It returns to the rotational movement completion position and is locked.

〔Example〕

The base 1 shown in FIG. 1 has a substantially box shape, and is fixed to the floor of the vehicle body. Also, base 1
A pair of guide rails 2 are attached in parallel to each other on both sides of the upper surface, and a slide member 3 is slidably fitted to each guide rail 2, respectively.

The slide member 3 is fixed to the lower surface side of the slide frame 4. A through hole 5 is formed approximately in the center of the sliding frame 4, and a plurality of lock holes 6 are formed on the same circumference around the through hole 5. In addition, a return spring 7 is stretched between the sliding frame 4 and the base 1, so that the sliding frame 4 is always facing the window (arrow F
direction).

Further, in order to prevent the sliding frame 4 from moving in the lateral direction, a stepped lateral movement locking mechanism 8 is provided. This lock mechanism 8 will be explained below.

A lock plate 9 is fixed to each of the guide rails 2. This lock plate 9
Lock holes 10a and 10b are formed at two locations spaced apart from each other in the length direction. On the other hand, a pair of engaging elements 11 are rotatably attached to the lower surface side of the sliding frame 4. Each engager 11 has a lock hole 10
It has a claw part 12 that selectively fits into the parts a and 10b. Each of the engaging elements 11 is connected to each other by an interlocking member 13 so as to rotate together, and one of the engaging elements 11 can be rotationally driven by an operating cable 14. Operation cable 1
The other end 14a of 4 is connected to a plate 30 of an operating lever 27, which will be described later.

The positional relationship of each lock hole 10a, 10b is as follows. That is, one lock hole 10
A is provided at a position where it engages with the claw portion 12 when the seat faces the front (or rear) of the vehicle and approaches the window as shown in FIG. The other lock hole 10b
is provided at a position where it engages with the claw portion 12 when the seat faces the aisle and approaches the window, as shown in FIG.

The lateral movement lock mechanism 8 having the above configuration has an engaging element 11.
By fitting into either one of the lock holes 10a, 10b, the sliding frame 4 can be prevented from moving laterally. Further, if the operating cable 14 is pulled to disengage the engaging member 11 from the lock hole 10a or 10b, the sliding frame 4 becomes movable in the lateral direction.

A rotating frame 15 is rotatably supported by the sliding frame 4. This rotating frame 15 is constructed as follows. That is, the rotating frame main body 16 is formed in a rectangular shape, and a cushion pad is provided on the upper surface side of the rotating frame main body 16. An annular rotating base 17 is fixed to the lower surface of the rotating frame body 16 with screws 18 . The rotating base 17 is rotatable relative to the support portion 4a of the sliding frame 4, and has a lock pin insertion hole 19 in a portion 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 rotate integrally with each other. And a lock mechanism 2 for fixing it in any rotational position.
5 is provided. This locking mechanism 25 has a locking pin 26 that selectively fits into any one of the plurality of locking holes 6, and this locking pin 26 is pivotally connected to an operating lever 27. This operating lever 27 is pivotally attached to a bracket 28 and has a pivot portion 29.
It is possible to swing vertically around the center. The lock pin 26 is normally urged downward by the resilient force of a spring 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. The cam followers 35 and 36 employ rotatable rollers, for example.

The base 1 is provided with a cam member 37 with which the cam followers 35 and 36 are in rolling contact. Cam member 3
7 is two types of cam surfaces 38 having different heights,
It has 39. That is, the upper cam surface 38
has a sloped surface 38a whose central portion is largely hollowed out in a substantially V-shape, and a pair of locking recesses 38b at both ends of the sloped surface 38a. One cam follower 35 is in rolling contact with this cam surface 38.

Further, the lower cam surface 39 is approximately arc-shaped and has a slightly hollowed shape. The other cam follower 36 is in rolling contact with this cam surface 39. Note that both cam followers 35 and 36 have a height difference from each other, and are in rolling contact with only one cam surface.

The rotating seat device configured as above is used as a bus,
When mounting a train or the like, the base 1 is attached to the floor in such a direction that the cam member 37 is located on the window side of the vehicle body.

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

As shown in FIG. 3, when the seat A faces toward the front (or rear) of the vehicle, the cam followers 35 and 36 are depressed into the locking recesses 38b, and the seat is fully moved toward the window. In this state, as shown in FIG.
is fitted into one of the lock holes 10a, and the sliding frame 4 becomes unable to move laterally. In other words, the seat is locked.
In this state, even if you operate the operating lever 27 to disengage the engaging element 11 from the lock hole 10a and move the seat to the aisle side, the engaging element 11 will not move as shown by the imaginary line in FIG. It simply slides on the surface of the lock plate 9, and is eventually returned to the position where it fits into the lock hole 10a by the return force of the return spring 7. Therefore, narrowing of the passage width can be prevented.

Then, when the operating lever 27 is pushed down, the lateral movement locking mechanism 8 is operated to the unlocked state via the operating cable 14, so that the sliding frame 4 is moved toward the guide rail 2.
It becomes possible to slide on the top and the lock pin 2
6 separates from the lock hole 6, the rotating frame 15 is in a state where it can freely rotate.

In this state, seat A in the direction of arrow _f1 shown in Figure 3.
When rotated, one cam follower 35 serves as a fulcrum and the other cam follower 36 moves away from the cam surface 39 as shown in FIG. 4, and the center of rotation a moves to a'. That is, the seat rotates about a' while moving in the direction of arrow _f2 . The cam follower 35 has a slope portion 38a.
5, the seat A moves toward the window B under the elastic force of the return spring 7, and the cam follower 35 is located at the most retracted position in the center of the cam surface, as shown in FIG.

Therefore, since the backrest of the seat is close to the window B, a sufficient space on the aisle side can be secured. Further, in this state, as shown in FIG. 8, the engaging element 11 fits into the lock hole 10b, thereby preventing lateral movement and fixing the seat. In this state, even if the operating lever 27 is operated to disengage the engager 11 from the lock hole 10b and move the seat to the aisle side,
As shown in phantom lines in FIG. 8, the engaging member 11 merely slides on the surface of the lock plate 9, and is eventually returned to its original position by the repulsive force of the return spring 7.

On the other hand, if the seat A is rotated in the opposite direction to that described above, the other cam follower 36 will now roll into contact with the other cam surface 39, and one cam follower 35 will move away from the cam surface 38. Therefore, as shown in FIG. 6, the seat A faces the window B and the center of rotation moves from a to a'. Therefore, sufficient leg space can be secured for the seat. In this state, the slide member 3 reaches its full stroke toward the aisle as shown in FIG. 9, so the seat cannot be pulled out any further toward the aisle.

As described above, according to this embodiment, a plurality of types of movement modes can be obtained depending on the direction of rotation of the seat, and the narrow interior space of the vehicle can be used effectively.

Further, if the operating force on the operating lever 27 is released when the seat faces in a desired direction, the operating lever 27 is returned to its original locked position by the spring 32. As a result, the lock pin 26 fits into the lock hole 6, making it impossible to rotate, and the lateral movement lock mechanism 8 also becomes locked, so that the sliding frame 4
will be unable to move and the seat will be fixed.

In the above embodiment, the cam member is provided on the base side,
Although the cam follower is provided on the rotating frame side, it is also possible to provide the cam follower on the base side and the cam member on the rotating frame side.

[Effect of idea]

According to the present invention, it is possible to prevent the seat from coming into contact with walls, windows, etc. when the seat is rotated, and it is also possible to ensure sufficient aisle width and leg space depending on the direction of rotation. Furthermore, even if the seat is intentionally moved laterally (toward the aisle) after the rotation is complete, the seat will not be fixed in the aisle position, and the rotation will eventually be completed by the restoring force of the return spring. It will return to the time position and be locked. Therefore, it is possible to prevent the seats from being fixed in a state where the aisle width is too narrow, which is effective in securing the aisle width.

[Brief explanation of the drawing]

1 to 9 show one embodiment of the present invention, in which FIG. 1 is an exploded perspective view of the rotating seat device, FIG. 2 is a perspective view of the sliding frame, and FIGS. 3 to 6 are mutual FIGS. 7 to 9 are plan views showing the action of the cam at different rotational positions, and FIGS. 7 to 9 are plan views showing the lateral movement lock mechanism in different operating states. FIGS. 10 and 11 are plan views showing conventional rotating seats, respectively. 1... Base, 4... Sliding frame, 7... Return spring, 8... Lateral movement lock mechanism, 15... Rotating frame,
35, 36...Cam follower, 37...Cam member, 38, 39...Cam surface.

Claims (1)

[Scope of utility model registration request] a base; a sliding frame supported slidably in the horizontal direction relative to the base; a rotating frame attached to the sliding frame and rotating in a horizontal plane; and either the base or the rotating frame. A cam member provided on one side and having two types of cam surfaces having different heights, and a cam member provided on the other side and having different cam surfaces in contact with each of the cam surfaces respectively when the rotating frame rotates forward and reversely. A cam follower that moves along the seat, a return spring that biases the sliding frame toward the window, and a stepped type that can lock the lateral position of the sliding frame with respect to the base only when the rotation of the seat is completed. A rotating seat device characterized by comprising a lateral movement lock mechanism.