JPH0230357Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotating chair for two or three people in a vehicle, particularly a railway passenger car.

This type of rotary chair has a seat cushion frame 2 for multiple people attached to the upper surface of a leg base 1 so that the center part thereof can be horizontally rotated about a shaft 3. The shaft 3 is formed into a disk shape for stability. That is, as shown in FIG. 2, a fixed disk 8 is arranged at the center of the upper surface of the leg base 1, and on top of the fixed disk 8, a disk 10 is attached to the bottom surface of the center of the cushion frame 2 with bolts 9. A presser ring 11, which is overlapped on the circumference of the disc 10, is fixed together with a fixed disc 8 through a spacer 12 to the leg stand 1 by bolts 17.

Then, the flanged shaft member 13 fitted from below into the hole 18 at the center of the fixed disk 8 is fixed to the center of the seat cushion frame side disk 10 with a bolt 14, and serves as a center guide for the upper and lower disks 8, 10. There is.

Further, on the same circumference near the outer periphery between the upper and lower discs 8 and 10, a large number of anti-friction balls 16 are interposed with a distance between them by races 15.

However, when the width of a chair that seats three people becomes longer, the left and right overhangs of the seat cushion frame 2 become larger, and even the disc axis becomes unstable. It may be possible to increase the diameter of the disk shaft 3 in order to stabilize it, but
Since the dimensions of the seat cushion frame 2 in the front-rear direction are fixed, it is impossible to increase the diameter of the disk shaft 3.

Therefore, as shown in the figure, seats 4, 4 are provided projecting from both left and right ends of the upper surface of the leg base 1, and the seats 4, 4 support the left and right sides of the seat cushion frame 2.

However, in order to change the direction of the chair, the seat frame 2
When the seat cushion frame 2 is rotated, the seat cushion is unsupported by the seats 4, 4 due to manufacturing errors or wear of the sliding surface of the disc shaft 3, in addition to the large left and right overhang of the seat cushion frame 2. Frame 2 may tilt slightly, and as you turn it, the seat cushion frame 2
The side surface 5A of the seat 5 on the bottom surface may come into contact with the seat 4 of the leg base 1, and rotation may be prevented.

In order to eliminate the above-mentioned trouble, conventionally, a gap is provided in advance between the catch seat 4 and the seat 5 on the seat cushion frame side so that the seat cushion frame 2 does not hit the catch seat 4 even if it is slightly tilted when changing direction. The right and left sides of the seat cushion frame 2 are brought into contact with and supported by the seats 4, 4 by deflection due to the load when sitting. However, there is a problem in that the seat cushion frame 2 rattles due to the vibrations of the vehicle when the passenger is not seated.

The purpose of the present invention is to solve the above-mentioned problems in the conventional rotating chair for vehicles. Compression spring members 6, 6 are arranged, and the elasticity of the spring members 6 is used to support the seat cushion frame 2 in contact with the seat 4 of the footrest 1 when seated, and to push the seat cushion frame 2 when not seated. The gist is that the relationship is set to support an upward trend.

Although there are no limitations on the structure and attachment means of the compression spring member 6, in the illustrated example, a largely curved band-shaped leaf spring is arranged in an arch shape between the front and rear upper frames 1A, 1B of the leg base 1, and the front and rear ends thereof are 6A, 6B upper frame 1
It is attached to the upper surface of each of A and 1B with a holding plate 7. There is a slight gap between the holding plate 7 and the end of the leaf spring 6, so that the end of the leaf spring 6 can slide on the upper frames 1A, 1B. The height of the leaf spring 6 in the free state is set so as to slightly overlap the bottom surface of the seat 5 of the seat cushion frame 2, as shown in FIGS. 2 and 3.

Instead of the above-mentioned leaf spring, the compression spring member 6 can also be attached by arranging a plurality of coil springs in front and behind each other and passing a common sliding plate across the end faces of these springs. Bend the sliding plate so that it becomes lower towards both the front and rear ends. In the embodiment, the compression spring member 6 is provided on the footrest 1, but it may also be provided on the lower surface of the seat cushion frame 2. A positioning stopper and a locking mechanism are provided between the leg base 1 and the seat cushion frame 2, but they are omitted from the figure.

Since the vehicle rotary chair of the present invention has the above-mentioned configuration, when a passenger is not seated, the seat cushion frame 2
As shown in Fig. 4, it is supported in an upward direction by the tension of the pair of left and right compression spring members 6, and is slightly lifted from the receiving angle 4, so that the seat frame 2 does not wobble even when subjected to vehicle vibrations. do not have.

When a passenger takes a seat, the seat cushion frame 2 is slightly bent by the load, and the bottom surface of the seat 5 is supported by the seat 4 of the footrest 1 as shown in FIG. 5, making it stable.

When the seat cushion frame 2 is turned to change the direction of the chair, the seat cushion frame 2 is floating from the seat 4 of the leg base 1, and the compression spring member 6 is compressed by being pressed by the seat cushion frame 2, so that the seat cushion frame 2 The rotating chair rotates without hitting the seat 4 of the leg base 1, and has the effect of eliminating the problems in the conventional vehicle rotating chair.

[Brief explanation of the drawing]

Figure 1 is a front view of the rotating chair for vehicles of the present invention, Figure 2
The figure is a partially enlarged vertical front view of the main part, Figure 3 is a vertical side view taken along the line of Figure 2, Figure 4 is when the seat is not seated, and Figure 5 is the relationship between the seat cushion frame and the footrest when seated. FIG. 1 is a footrest, 2 is a seat cushion frame, 3 is a shaft, 4 is a catch seat, 5 is a seat, 6 is a compression spring member, 7 is a presser plate, 8
1 is a fixed disk, 10 is a disk integrated with the seat cushion frame, 1
1 is a presser ring, 12 is a spacer, and 16 is a ball for reducing friction.

Claims (1)

[Scope of utility model registration request] Place the center part of the seat cushion frame for multiple people on the top of the leg base, overlap the disc attached to the bottom of the center of the seat frame on the fixed disc on the top of the leg base, and secure the periphery of the disc with a press ring. In a vehicle chair that is attached with a disc shaft formed by a presser and whose seat cushion frame can be rotated horizontally, a pair of compression spring members on the left and right sides of the seat cushion frame are arranged between the opposing surfaces of the footrest and the seat cushion frame, with the disc shaft in the middle. ,
This rotary chair for a vehicle is set such that the elasticity of the spring member is such that the seat cushion frame is supported in contact with the seat of the leg base by the load when the user is seated, and supports the seat cushion frame in a tendency to push up when the user is not seated.