JPH0535861Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a rotating seat that can be rotated forward or backward, among vehicle seats installed in a train vehicle or the like.

(Prior Art) The main components of this type of rotating seat for a vehicle include a fixed leg base 1 that is fixedly attached to the floor surface inside the vehicle, and a seat frame 2 that is rotatably attached to the fixed leg base 1. However, in this prior art, thrust balls (steel balls) are inserted at appropriate intervals in the center between the fixed leg base 1 and the seat frame 2, and the seat frame 2 is rotated. I tried to support him freely.

(Problem to be solved by the invention) In order to interpose the thrust ball in the central part of the pedestal and the underframe as described above, the structure of the pedestal side receiving plate and the underframe side rotary disk must be changed as described above. The thrust ball (steel ball) must be formed so that it rolls smoothly and does not rattle, which requires a large number of processing steps and parts, and also has the disadvantage of being heavier. Since the thrust ball is simply interposed directly between the two plates, uneven load due to point contact during use, slight distortion due to vibration, impact, etc. are generated, resulting in an increase in rotational resistance. Furthermore, since the thrust ball is disposed at the center of the leg base and the underframe, the stability of the seat underframe is somewhat poor.

The purpose of the present invention is to solve the problems inherent in the above-mentioned conventional technology, and to propose a rotating seat for vehicles that has a simple structure, can reduce rotational resistance and weight, and has good stability. do.

(Means for Solving the Problems) In order to solve the above problems, the present invention, as indicated by the reference numerals in the attached drawings, includes a seat frame 2 rotatably attached to a fixed leg base 1. In the rotary seat for a vehicle, a tetrafluoride resin or the like is placed near the outer periphery of either one of the rotary disk 4 fixed to the seat frame 2 or the top plate 6 fixed to the fixed leg base 1 facing the rotary disk 4. A sliding plate 7 having a small coefficient of friction is fixed in an annular shape, and the rotary plate 4 is slidably abutted on the upper surface of the fixed leg base 1 via the sliding plate 7, while the center of the upper plate 6 of the fixed leg base 1 A circular hole 13 is provided in the top plate 6.
The circular hole 1 is formed in the central part of the rotary disk 4 facing the
A fitting annular projection 12 is provided along the inner peripheral edge of the upper surface plate 6, and a lifting prevention plate 15 having a diameter larger than that of the circular hole 13 is attached to the annular projection 12 so as to face the back side of the upper surface plate 6. The following configuration is adopted.

(Function) The sliding plate 7 fixed to the seat frame side rotary plate 4 makes surface contact with the top surface of the fixed leg base 1, and the contact area is increased compared to the conventional thrust ball system, and the load is uniformly applied to the top surface of the fixed leg base. Because it is subjected to a lot of stress, there is no distortion caused by local loads, and it can be used stably for a long period of time.

Since the sliding plate 7 is made of a material with a small coefficient of friction such as 400% resin, rotational resistance is naturally reduced, and the fixed leg base 1 that supports the sliding plate 7 is simply formed on a flat surface. good.

Since the sliding plate 7 is annularly arranged near the periphery of the rotary plate 4, the load applied to the seat frame 2 is received by the wide annular surface of the upper surface of the fixed leg base 1 via the rotating plate 4 and the sliding plate 7. There is no rattling or deformation due to vibration or impact, and the product is more stable.

(Embodiment) Fig. 1 shows the appearance of an embodiment of the present invention, in which a fixed leg base 1 formed in a cylindrical shape has leg base mounting arms 1a, 1a protruding radially. arm 1
The fixed leg base 1 is fixed at a desired position by being bolted to the vehicle interior floor or the like. A seat frame 2 rotatably attached to the top surface of the fixed leg base 1
A frame is formed by welding, riveting, etc. the horizontal beams 2a and vertical beams 2b using aggregate, and a pair of channel-shaped support beams 3, 3 are also formed as a framework in the central part.

Referring also to FIGS. 2 and 3, a disc-shaped rotary disk 4 is fixed to the lower surface of the pair of support bars 3, 3 with bolts and nuts 5, and the upper surface plate 6 of the fixed leg base 1
It overlaps concentrically with the annular flange portion 6a.

In particular, near the periphery of the lower surface of the rotating disk 4,
As shown in the figure, Si Ninghua resin (trade name Teflon),
A sliding plate 7 having a small coefficient of friction, such as nylon, is fixed in an annular shape by screws 8. Corresponding to the sliding plate 7, an annular receiving plate made of a stainless steel plate or the like with a smooth finish is provided on the upper flange portion 6a of the fixed leg base 1. 9 is similarly fixed by a screw 10, and thereby the sliding plate 7
is in contact with the receiving plate 9. As shown in FIG. 2, the sliding plate 7 is a fan-shaped sliding plate member 7a mainly for material reduction.
are arranged annularly at appropriate intervals, but they may also be arranged in a so-called annular sliding plate that is continuous in an annular shape.

Further, although the sliding plate 7 is fixed to the rotary plate 4, it may also be fixed to the upper surface side of the fixed leg stand 1 facing the rotary plate 4. In this case, the annular receiving plate 9 can be rotated. It will be fixed to board 4.

Further, the pair of support bars 3, 3 are preferably fixed as close to the outer periphery of the rotary disk 4 as possible, as shown in FIGS. The seat weight that is applied to the disc 4 is uniformly received over the entire area of the sliding plate 7 provided near the outer peripheral edge of the rotary disc 4, so that the seat weight does not reach the center.

Furthermore, as shown in FIG. 3, a downward annular projection 12 is provided at the center of the rotating disk 4, and the annular projection 12 is provided on the top plate 6 of the fixed leg base 1.
A circular hole 13 is formed therethrough, and a floating prevention plate having a diameter larger than that of the circular hole 13 is provided on the lower surface side of the top plate 6 at the tip mounting seat 14 of the annular projection 12 passing through the circular hole 13. 15 is fixed with bolts 16, thereby preventing the rotary disk 4 from lifting off from the fixed base 1 and from shifting in the radial direction. In FIG. 1, the chain line 18 indicates a part of the seat contour, and 19 is a hole for reducing the weight of the fixed leg base 1.

The user's load is applied mainly to the vicinity of the outer periphery of the rotary disk 4 via a pair of support bars 3, 3 that are integrated with the seat frame 2, and this load is transferred to a sliding plate provided in an annular shape near the periphery of the rotary disk 4. By being supported by the receiving plate 9 of the fixed leg base 1 through the support plate 7, it is possible to stably maintain a stationary position, and when changing the direction of the seat forward or backward, the above-mentioned with a small coefficient of friction The sliding plate 7 slides on the receiving plate 9 to smoothly rotate the seat through 180°.

(Effects) According to the present invention, the following unique effects are exhibited compared to the conventional technology.

Since the seat frame on the fixed leg base is rotated through a slide plate with a small coefficient of friction such as a slip plate made of 4-hex resin, rotational resistance can be significantly reduced compared to the conventional thrust ball system, and it can be used as a slide plate. Experiments have shown that when using a SiNen resin material, the rotational resistance is 60% lower than that of the conventional thrust ball system.

The above-mentioned sliding plate is in surface contact with the top surface of the fixed leg base or the bottom surface of the rotary plate of the seat frame, and the seat frame is supported by the large diameter annular surface. There is no deformation such as rattling or distortion in the rotating parts, so it can be used stably for a long period of time.

Since it is only necessary to insert the above-mentioned sliding plate between the rotary disk of the seat frame and the top surface of the fixed leg base, there is no need for a complicated cross-sectional structure and a large number of attachment parts to load the thrust ball as in the past. However, it is easier to manufacture and the weight of the rotating part structure can be reduced, and as a result of experiments, we were able to achieve a weight reduction of 55% compared to the conventional model.

The sliding plate described above, which reduces rotational resistance of the seat frame, is provided near the outer periphery of either the rotating plate of the seat frame or the top plate of the fixed leg base, but prevents the seat frame from lifting up from the fixed leg base. An annular protrusion or the like is provided at the center of each of the rotary plate and the top plate to prevent the board and seat frame from moving laterally, so when the seat frame tries to lift off from the fixed leg base or moves laterally. The unbalanced load caused by this is received by the central portions of the rotating plate and the upper plate, and the unbalanced load is hardly applied to the sliding plate near the outer periphery. This prevents the sliding plate from becoming distorted or uneven even if the seat frame is lifted from the fixed leg base due to vibrations or shocks when the vehicle is running, or is forced to move laterally, ensuring smooth rotation of the seat frame over a long period of time. can be guaranteed.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is an exploded perspective view, Figure 3 is a partially sectional front view of the same,
FIG. 4 is an enlarged sectional front view of the same main part. 1... Fixed leg base, 3... Seat frame, 4... Turning plate, 7... Sliding plate, 9... Receiving plate.

Claims (1)

[Scope of utility model registration request] In a rotary vehicle seat in which a seat frame is rotatably attached to a fixed leg base, either one side of the rotary plate fixed to the seat frame or the top plate fixed to the fixed leg frame facing the rotary plate. A sliding plate with a small friction coefficient, such as tetrafluorocarbon resin, is fixed in an annular shape near the outer periphery, and the rotary plate is slidably brought into contact with the upper surface of the fixed pedestal via the sliding plate, while the upper surface plate of the fixed pedestal A circular hole is provided in the central portion of the rotary disk, and an annular projection that fits along the inner peripheral edge of the circular hole is provided in the central portion of the rotary disk facing the top plate, and the annular projection is provided with a diameter larger than the circular hole. A rotating seat for a vehicle comprising a large anti-lifting plate attached to face the back side of the above-mentioned top plate.