JPH10230763A - Rotating device for seat for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely position a seat in place with no rattling caused in rotation even if there are manufacturing errors in component parts, and concurrently provide sufficient strength for its device. SOLUTION: This device is provided with a ring shaped upper plate 2 to be fixed to the seat side member of a vehicle, a ring shaped lower plate 1 to be fixed to the floor side member of the vehicle, and with a set plate 3 to hold the upper plate 2 together with the lower plate 1. Balls 61 are interposed between the upper plate 2 and the lower plate 1, and balls 61 are also interposed between the upper plate 2 and the set plate 3. The balls 62 are brought into contact with both the side surfaces of guiding grooves 51 and 53 in a V shape in cross section each, which are formed in the surfaces faced to each other of the upper plate 2 and the set plate 3, and the upper plate 2 is positioned in place with no rattling caused in both horizontal and vertical directions even if there exist manufacturing errors in the respective plates 1, 2 and 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating device for a vehicle seat, and more particularly, to a rotating device for reliably positioning an upper plate while preventing the occurrence of rotational play due to a manufacturing error or the like.

[0002]

2. Description of the Related Art In a one-box car or the like, a rotating sheet is often used in which a sheet is rotated from front to back so as to be able to face a sheet disposed behind. An example of such a rotating device for a vehicle seat is disclosed in Japanese Patent Application Laid-Open No. H08-11600, which will be described with reference to FIG. In the figure, a lower plate 1A fixed to a floor-side member such as a seat truck is shown.
Is a ring body having an L-shaped cross section, and a sliding portion 11A having an inverted U-shaped cross section is formed at the top of the outer peripheral vertical wall. on the other hand,
An upper plate 2A fixed to a seat-side member such as a seat cushion frame is a ring body having a U-shaped cross section that opens downward, and an inner peripheral edge thereof is bent downward to form a corner portion 21A.
It has become. A ball 3A is provided between the corner portion 21A and the inclined surface of the sliding portion 11A, and an upper plate 2A is provided.
Are rotatably supported on the lower plate 1A. A bracket 4A having a sliding portion 41A having a U-shaped cross section is fixed to the upper plate 2A, and the sliding portion 41A of the bracket 4A can slide on the sliding portion 11A of the lower plate 1A via the resin member 5A. (The above is the first)
Conventional example).

[0003] Also, Japanese Patent Application Laid-Open No. 6-87364 discloses that
FIG. 22 shows a vehicle seat rotating device as shown in FIG. In FIG. 22, an inner peripheral portion 11B of a ring-shaped lower plate 1B fixed to a floor-side member is bent upward, and a first corner portion 13B is formed on the inner peripheral portion 11B. On the other hand, the upper plate 2B fixed to the sheet-side member has an inner peripheral portion 21B bent upward, and a second surface facing the first corner portion 13B inside and outside the inner peripheral portion 21B. Corner portion 23B and a third corner portion 24B.
Are formed. A ball 3B is provided between the first corner portion 13B and the second corner portion 23B, and the upper plate 2B is rotatably supported on the lower plate 1B by the ball 3B. I have. A ring-shaped set plate 4B is fixed on the inner peripheral portion 11B of the lower plate 1B. The outer peripheral edge of the set plate 4B is bent downward, and a fourth corner portion 44B facing the third corner portion 24B is formed on the outer peripheral edge. A ball is provided between the third corner portion 24B and the fourth corner portion 44B.
5B is provided (the above is the second conventional example).

[0004]

In the first prior art, the ball 3A is interposed between the inclined surface of the sliding portion 11A and the corner portion 21A to thereby form the upper plate 2.
A is positioned and play is prevented. However, since the seat load is applied to the ball 3A via the upper plate 2A, the inclined surface is likely to be worn with the use of the seat. When the inclined surface is worn, the position of the upper plate 2A is lowered as a whole, and the resin member 5A is separated from the inner peripheral surface of the sliding portion 11A, thereby causing vertical play.

On the other hand, in the second conventional example, the ball 3B provided inside the rotating device receives a seat load input via the upper plate 2B, and the ball 3B, the corner portions 13B and 23B, and the ball 5B And the corner portions 24B and 44B position the upper plate 2B and prevent backlash. However, the corners 13B, 23
The vertical walls of B, 24B, and 44B tend to cause panel forming errors and the like, and there is a problem that a gap is formed between the vertical walls and the balls 3B and 5B, thereby causing play. Further, since the seat load is received by the ball 3B located far from the load input side, the upper plate 2B is easily deformed, which is disadvantageous in terms of device strength, and the upper plate 2B is supported by the ball 3B by the seat load. Is deformed on the load input side, and a gap is formed in the vertical direction between the ball 5B and the corner portions 24B and 44B, which causes play.

SUMMARY OF THE INVENTION The present invention has been made in order to solve such problems, and provides a rotating device for a vehicle seat that can reliably position a seat without generating a rotational backlash and has sufficient device strength. The purpose is to do.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, a vehicle seat rotating apparatus according to the present invention is provided.
Ring-shaped upper plate fixed to the side member (2)
A ring-shaped lower plate (1) fixed to a floor member of the vehicle, a set plate (3) for holding the upper plate (2) together with the lower plate (1), an upper plate (2) and the lower A first resistance reducing member (6) interposed between the first plate and the plate (1) to reduce frictional resistance between the first and second plates.
1), upper plate (2) and set plate (3)
And a second resistance reducing member (62) interposed between the first resistance reducing member (62) and the second resistance reducing member (63) for rotating the first resistance reducing member (61) and the second resistance reducing member (63). The first resistance reducing member (61) positioned on the side where the sheet load is input receives the sheet load input from the upper plate (2) and the second resistance reducing member (61) positioned on the side where the sheet load is input.
The upper plate (2) is positioned without rattling by the resistance reducing member (62).

[0008] The rotating device of the present invention has a function of receiving the sheet load and a function of positioning at different portions in the device, respectively. There is no risk that the constituent members will be worn and play will occur. In addition, since the first resistance reducing member for receiving the sheet load is located on the side where the sheet load is input, deformation of the upper plate can be prevented, and the strength of the device is improved. Further, when the load input side of the upper plate is lowered with the first resistance reducing member as a fulcrum due to the deformation of the upper plate due to the seat load, the second plate on the opposite side is lowered.
In the part where the resistance reducing member is located, the upper plate rises upward so that the gap with the set plate becomes narrower,
As a result, generation of a gap in the vertical direction and play due to the gap are prevented.

The same operation as described above can be obtained by fixing the second resistance reducing member (65) to the upper plate (2) or the set plate (3). The present invention is also applicable to a rotating device having a structure in which the lower plate (1) is held by the upper plate (2) and the set plate (3).

When the lower plate (1) and the set plate (3) hold the upper plate (2), or when the upper plate (2) and the set plate (3) hold the lower plate (1). , The first and second resistance reducing members (61, 62) are connected to the upper plate (2) at a predetermined pressure.
Alternatively, the lower plate (1) may be configured to be in contact with the lower plate (1). According to such a configuration, vertical play during rotation of the upper plate is more effectively prevented.

For positioning by the second resistance reducing member, for example, the second resistance reducing member (62) is formed on at least one of the opposing surfaces of the upper plate (2) and the set plate (3). 2) and by bringing the set plate (3) into contact with a radially inclined surface of the set plate (3). According to this, even if a manufacturing error occurs during plate molding, not only the vertical play during the rotation of the upper plate but also the horizontal play is effectively suppressed,
The sheet is reliably positioned. Here, the inclined surface does not need to be a flat surface as a whole, and can be said to be an inclined surface even if it has a partial recess or a curved surface as long as it is entirely inclined.

The inclined surface can be constituted by both side surfaces (511, 512, 521, 522) of the V-shaped grooves (51, 52). According to such a configuration, in addition to the above-described operation, when the balls (61, 62) are used as the resistance reducing member, the positioning of the balls at the time of assembling the device can be reliably performed. As the resistance reducing member, a resin ring (63, 64, 65) or the like can be used in addition to the ball, and the ball can be made of resin other than metal. When a resin ring or a ball made of resin is used, they come into contact with the upper plate by their own resilience, thereby effectively preventing vertical and horizontal play during rotation of the upper plate.

The reference numerals in parentheses indicate the correspondence with specific means described in the embodiments described later.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) An example of a vehicle seat rotating device according to the present invention will be described with reference to FIGS. 1 is an overall perspective view of the rotating device, FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, and FIG. 2 is a cross-sectional view taken along the line III-III of FIG.
As shown in FIG. 1, the rotating device includes a ring-shaped lower plate 1 having a substantially square outer shape fixed on a floor-side member such as a seat truck, and a seat cushion concentrically disposed above the lower plate. A ring-shaped upper plate 2 having a substantially square outer shape is fixed to a seat-side member such as a frame. As shown in FIG. 2, the lower plate 1 is gradually raised from the outer peripheral portion 13 fixed to the floor-side member toward the intermediate portion 11 and the inner peripheral portion 12 in the radial direction. A guide groove 41 is formed by curving a concave groove having an arc-shaped cross section that opens upward along the entire surface.

The upper plate 2 is lowered stepwise from the outer peripheral portion 22 fixed to the seat-side member to the inner peripheral portion 21.
The inner peripheral part 21 is located above the intermediate part 11 of the lower plate 1, and a concave groove having an arc-shaped cross-section that opens downward is formed on the plate surface over the entire circumference at a position directly above the guide groove 41. The guide groove 42 is formed. A metal ball 61 held by a holder (not shown) is located in a ring-shaped space formed by the guide grooves 41 and 42. The curvature of the guide grooves 41 and 42 is
1 is smaller than the curvature. The inner peripheral portion 31 of the set plate 3 is connected to the inner peripheral portion 12 of the lower plate 1 by caulking pins 71, and the plate surface of the set plate 3 extends above the inner peripheral portion 21 of the upper plate 2.

Guide grooves 51 and 52, each having a V-shaped cross section, extend in the opening direction from the entire periphery of the plate surface of the outer peripheral portion 32 of the set plate 3 and the entire periphery of the plate surface of the inner peripheral portion 21 immediately below the set plate 3. A metal ball 62 held by a holder (not shown) is located in a ring-shaped space formed by the guide grooves 51 and 52 so as to be opposed to each other. Thus, the upper plate 2 has its inner peripheral portion 2
1 is held by the set plate 3 and the lower plate 1 from above and below via the balls 61 and 62, and is smoothly rotated with small frictional resistance. In addition, hook-shaped regulating members 14 and 23 are provided on the outer peripheral portions 13 and 22 of the lower plate 1 and the upper plate 2 at a plurality of positions on the opposing surfaces, and the two plates 1 and 2 are pulled by a pulling load input from a seat belt or the like. Are not separated too much.

As shown in FIG. 3, through holes 221 and 321 are formed in the upright walls of the outer peripheral portions 22 and 32 of the upper plate 2 and the set plate 3 when the sheet is seated backward or forward. Are formed. On the other hand, on the upper surface of the outer peripheral portion 22 of the upper plate 2, an operation shaft 27 is horizontally supported by a bracket 26 and is rotatable. The operation shaft 27 is provided with a hook 241. When the seat is in a rearward or forward facing sitting state, the rotation of the sheet is locked by the hook 241 passing through both the through holes 221 and 321. Is done.
When the operation shaft 27 is rotated, the hook 241 comes out of both the through holes 221 and 321 and the sheet can be rotated.
The operation shaft 27 is provided with a hook 241 and both through holes 221 and 221.
A coil spring 242 (FIG. 1) that urges the coil spring 321 to enter the inside is provided.

The assembling of the sheet rotating device having the above structure is performed as follows. First, the lower plate 1 is set on a jig. Next, a plurality of balls 61 held at equal intervals by a retainer are placed in the guide grooves 41 of the lower plate, and then the upper plate 2 is placed on the lower plate so that the guide grooves 42 coincide with the balls 61. Place on top of 1. At this time, the regulating member 14 of the lower plate 1 and the regulating member 23 of the upper plate 2
Is performed with the upper plate 2 slightly rotated so as not to interfere. Next, in the guide groove 51 of the upper plate 2,
A plurality of balls 62 held at equal intervals by a holder are placed, and the set plate 3 is placed on the upper plate 2 so that the guide grooves 52 coincide with the balls 62. Then, the set plate 3 is fixed to the inner peripheral portion 12 of the lower plate 1 with rivets 71.

FIG. 4 is a sectional view of the rotating device immediately before fixing the set plate 3 to the lower plate 1. As is clear from the drawing, when the set plate 3 is merely placed on the upper plate 2, the top of the ball 62 is located above the final set position, and the set plate 3 is separated from the upper plate 2 by the dimension H upward. ing. Therefore, when fixing the set plate 3 with the rivets 71, the inner peripheral portion 31 of the set plate 3 is connected to the inner peripheral portion 1 of the upper plate 2.
Press down until it comes into contact with No. 2 (two-dot chain line in FIG. 4). As a result, the inclined side surfaces of the guide groove 52 come into contact with the outer peripheral surface of the ball 62 and push it downward, whereby the inner peripheral portion 21 of the upper plate 2 moves downward as indicated by the two-dot chain line in the drawing. To bend. Thus, as shown in FIG.
1 and both side surfaces 52 of the guide groove 52
1 and 522 abut on the outer peripheral surface of the ball 62 at points 621 to 624 without any gap. As a result, the upper plate 2 is positioned without play in the vertical direction, and also plays back in the horizontal direction. Position without causing Since the guide groove 52 has a V-shaped cross section that opens downward, when the set plate 3 is placed on the upper plate 2 via the ball 62, the caulking hole 3 is formed.
11 (FIG. 4) is positioned so as to substantially coincide with the swaging hole 121 of the lower plate 1.

By the way, when the set plate 3 is fixed to the upper plate 2, the two guide grooves 51,
The relative position of 52 may be shifted in the horizontal direction. Here, in this embodiment, since the cross-sectional shape of the guide groove 51 is V-shaped, as shown by the broken line in FIG.
Is relatively shifted rightward, the inclined surface 511 of the guide groove 51 does not contact the outer peripheral surface of the ball 62, and the inclined surface 512
Only the point 621 contacts the outer peripheral surface of the ball 62 at the point 621 and receives a load between the point 622 and the point 622 which contacts the inclined surface 521 of the guide groove 52. On the other hand, as shown by the two-dot chain line in FIG. 5, when the guide groove 51 is relatively shifted to the left, the inclined surface 512 of the guide groove 51 does not contact the outer peripheral surface of the ball 62, and 5
Only 11 comes into contact with the outer peripheral surface of the ball 62 at the point 623,
A load is applied between the guide groove 52 and a point 624 which comes into contact with the inclined surface 522. As described above, in any case, since the ball 62 abuts on the inclined surfaces 511, 522 or 512, 521 opposed in the horizontal direction (ie, the radial direction of the rotating device) without any gap, the upper plate 2 is Positioning is performed without play in both the vertical and horizontal directions. In the above description, the upper plate 2 is deformed with respect to the set plate 3, but which is deformed depends on the rigidity of each of the plates 2 and 3. Therefore, the set plate 3 may be deformed, or both plates 2 and 3 may be deformed.

The seat load input via the upper plate 2 when the rotating device is used is received by the ball 61 located on the outer peripheral side of the device, which is the side to which the load is input, so that the distance from the load application point to the ball 61 is reduced. Shorter,
The deformation of the upper plate 2 is prevented. At this time, since no seat load is applied to the ball 62, the guide grooves 51, 5
Wear of No. 2 is also kept small, and a reliable positioning action is exhibited. Further, when the load input side of the upper plate 2 is lowered with the ball 61 as a fulcrum due to the deformation of the upper plate 2 due to the seat load, the space between the upper plate 2 and the set plate 3 becomes narrower in a portion where the ball 62 on the opposite side is located. As a result, generation of a gap in the vertical direction and play due to the gap are prevented.

(Second Embodiment) FIG. 6 corresponds to FIG. 4 in the first embodiment. In the guide groove 51 of the upper plate 2 and the guide groove 52 of the set plate 3, the metal in the first embodiment is provided. A resin ring 63 having a circular cross section is provided in place of the ball 62. FIG. 7A shows the overall shape of the resin ring 63. Such a resin ring 63 can be elastically deformed. When the set plate 3 is fixed to the inner peripheral portion 12 of the lower plate by caulking as shown by a two-dot chain line, the difference in the dimension H is also caused by the deformation of the resin ring 63. Absorbed. At this time, since the resin ring 63 abuts on both side surfaces of the V-shaped cross-section guide grooves 51 and 52 without generating a gap at four places on the outer peripheral surface due to its own elastic force, the upper plate 2 is horizontally and vertically. Positioning is performed without any backlash in any direction.

In place of the resin ring 63, FIG.
As shown in (B), if a resin ring 64 having a large diameter spherical portion 641 only at a plurality of locations in the circumferential direction is used, in addition to the above-described effects, the frictional resistance during rotation of the upper plate 2 can be sufficiently increased. Can be smaller. Further, a resin ball may be used instead of the resin ring. In the present embodiment, it is preferable to provide a metal ball 61 as shown in FIG. 7 in the guide grooves 41 and 42 in order to support the seat load.
The above-mentioned resin ring or the like can be used instead of 1.

(Third Embodiment) In the rotating device shown in FIG. 8, a flange 25 which is bent upward is formed all around the inner peripheral end of the upper plate 2, and a resin ring 65 is fitted into the flange 25. The upper half of the resin ring 65 has a semicircular cross section, and is located in the guide groove 52 having a V-shaped cross section of the set plate 3. Such a resin ring 6
5 is elastically deformable to some extent. When the set plate 3 is fixed to the inner peripheral portion 12 of the lower plate by caulking as indicated by a two-dot chain line, the deformation of the resin ring 65 and the outer peripheral portion 32 of the set plate or the inner portion of the upper plate 12 The difference in the dimension H is absorbed by the deformation of the peripheral portion 21. As a result, the upper plate 2 is positioned without rattling in the vertical direction. At this time, the resin ring 65
Since the location abuts on both side surfaces of the guide groove 52 without any gap, the upper plate 2 is positioned without play in the horizontal direction.

(Fourth Embodiment) As shown in FIG. 9, the flange 3 bent downward around the entire outer peripheral end of the set plate 3.
In the third embodiment, the resin ring 65 is fitted into the resin plate 3 and the lower half of the semicircular cross section is positioned in the V-shaped guide groove 51 of the upper plate 2. Has the same effect as.

(Fifth Embodiment) In the rotating device shown in FIG. 10, the set plate 3 is formed as an inclined surface 53 having a constant angle in which a boundary region between the inner peripheral portion 31 and the outer peripheral portion 32 rises toward the outer peripheral portion 32. I have. The metal ball 62 located in the guide groove 51 of the upper plate 2 is
3 is in contact. Other structures are the same as those of the first embodiment already described.

According to such a structure, as shown in FIG. 11, both side surfaces 511 and 512 of the guide groove 51 do not have any gap, and the outer circumferential surface of the ball 62 and the points 625 and 62
6 and the inclined surface 53 contacts the outer peripheral surface of the ball 62 at a point 627. As a result, the upper plate 2
Are positioned without rattling in the vertical direction, and are also positioned in the horizontal direction without rattling.

When the set plate 3 is fixed to the upper plate 2, the relative position between the inclined surface 53 and the guide groove 51 may be shifted in the horizontal direction due to a manufacturing error. Here, as shown by a broken line in FIG. 11, for example, even if the inclined surface 53 is relatively displaced to the left, the set plate 3 is pressed downward by its own elastic force. At the point 627, and the point 627
62 which abuts against both side surfaces 511 and 512 of the guide groove 51
The load is received between three points of 5,626. On the other hand, FIG.
As shown by the two-dot chain line 1, even if the inclined surface 53 is relatively shifted to the right, the set plate 3 is pushed up and the inclined surface 53 keeps contacting the outer peripheral surface of the ball 62 at the point 627. Point 627 and both side surfaces 511 and 512 of the guide groove 52
The load is received between three points, that is, points 625 and 626 that come into contact with. Thus, in each case, the ball 62
Since the inclined surfaces 53 and 511 opposed to each other in the horizontal direction (that is, the radial direction of the rotating device) abut without gaps, the upper plate 2 is positioned without any play in both the vertical and horizontal directions. In this embodiment, if the inclination angle of the inclined surface 53 is reduced within a range that does not impair the positioning action, the load is reduced to the inclined surfaces 511 and 51.
2 is effective in preventing abrasion and the like.

In the above description, the upper plate 2
Although the set plate 3 is deformed, which one is deformed depends on the rigidity of each of the plates 2 and 3. Therefore, when the upper plate 2 is deformed,
Both plates 2 and 3 may be deformed together. Further, instead of the metal balls 61 and 62, the resin ring 63 and the like described in the second embodiment can be used.

(Sixth Embodiment) Instead of the guide groove 51 of the inner peripheral portion 21 of the upper plate in the fifth embodiment, FIG.
2, the ball 62 is sandwiched between the inclined surface 54 and the inclined surface 53 of the set plate 3 in the same manner as in the fifth embodiment. Is obtained.

(Seventh Embodiment) In the rotating device shown in FIG. 13, an inclined surface 55 is formed on the inner peripheral portion 21 of the upper plate 2 so as to be inclined downward toward the inside of the device. A vertical surface 56 is formed at the boundary of the outer peripheral portion 32. Then, the outer periphery of the ball 62 is brought into contact with the inclined surface 55, the vertical surface 56 and the horizontal plate surface of the set plate outer peripheral portion 32. With such a structure, the same operation and effect as in the fifth embodiment can be obtained.

(Eighth Embodiment) In the rotating device shown in FIG. 14, a vertical surface 57 is formed on the inner peripheral portion 21 of the upper plate 2, and the inclined surface is inclined at the boundary between the inner peripheral portion 31 and the outer peripheral portion 32 of the set plate 3. A surface 58 is formed. And the slope 5
The outer periphery of the ball 62 is brought into contact with the vertical surface 57 and the horizontal plate surface of the upper plate inner peripheral portion 21. With such a structure, the same operation and effect as in the fifth embodiment can be obtained.

(Ninth Embodiment) First Embodiment and Second Embodiment
The present invention described in the embodiment can also be applied to a rotating device having a structure as shown in FIG. In the drawing, the lower plate 1 is gradually raised from an outer peripheral portion 13 fixed to a floor-side member toward an inner peripheral portion 12 in a radial direction, and is opened upward over the entire surface of the inner peripheral portion 12. A concave groove having an arc-shaped cross section is curved to form a guide groove 81.

The upper plate 2 is stepped down from the outer peripheral portion 22 fixed to the seat side member to the intermediate portion 24 and continues to the inner peripheral portion 21. The intermediate portion 24 corresponds to the guide groove 81. A concave groove having an arcuate cross section that opens downward is curved and formed as a guide groove 82 over the entire circumference at the position directly above. A metal ball 62 held by a holder (not shown) is located in a ring-shaped space formed by the guide grooves 81 and 82. In addition, the guide grooves 81 and 82
Is smaller than the curvature of the ball 61. The inner peripheral portion 31 of the set plate 3 is connected to the inner peripheral portion 21 of the upper plate 2 by caulking pins 71, and the plate surface of the set plate 3 extends below the inner peripheral portion 12 of the lower plate 1.

V-shaped guide grooves 91 and 92 are respectively opposed in the opening direction to the entire periphery of the plate surface of the outer peripheral portion 32 of the set plate 3 and the entire periphery of the plate surface of the lower plate inner peripheral portion 12 immediately above the set plate 3. The guide grooves 91,
The metal ball 61 held by a holder (not shown) is located in the ring-shaped space formed by 92. In this manner, the upper plate 2 and the set plate 3 are connected to the inner peripheral portion 1 of the lower plate 1 via the balls 61 and 62.
2 is held from above and below, and can be smoothly rotated with small frictional resistance.

In such a rotating device, the inclined side surfaces of the guide groove 91 and the inclined side surfaces 521, 5 of the guide groove 92 are provided.
22 are in contact with the outer peripheral surface of the ball 61 without any gap. As a result, the upper plate 2 is positioned without play in the vertical direction, and is also positioned without play in the horizontal direction. . Even when the relative positions of the guide grooves 91 and 92 are shifted in the horizontal direction due to a manufacturing error, as described in the first embodiment, the ball 6
1 abuts on the inclined surfaces facing each other in the horizontal direction without gaps, whereby the upper plate 2 is positioned without play in both the vertical and horizontal directions.

(Tenth Embodiment) The present invention described in the third embodiment and the fourth embodiment can be applied to the rotating device having the structure described in the ninth embodiment, an example of which is shown in FIG. . In the figure, a flange 15 bent downward is formed around the entire inner peripheral end of the lower plate 1, and a resin ring 65 is fitted into the flange 15. The lower half of the resin ring 65 has a semicircular cross section and is located in the guide groove 91 having a V-shaped cross section of the set plate 3. Since the resin ring 65 abuts on both side surfaces of the guide groove 91 without any gap at the outer periphery of the lower half portion, the upper plate 2
Is positioned without play in the vertical and horizontal directions.

(Eleventh Embodiment) Fifth Embodiment to Eighth Embodiment
The present invention described in the embodiment can be applied to the rotating device having the structure described in the ninth embodiment.
Shown in In the figure, an inclined surface 94 that inclines inward in the apparatus is formed on the inner peripheral portion 12 of the lower plate 1,
The outer peripheral portion 32 of the set plate 3 is formed with an inclined surface 93 inclined downward to the outside of the apparatus. Then, the outer periphery of the ball 61 abuts on these inclined surfaces 93 and 94 without generating a gap, and the upper plate 2 is positioned without any play in both the vertical and horizontal directions.

(Twelfth Embodiment) Both side surfaces of the V-shaped guide grooves 51 and 52 described in the first embodiment are respectively
As shown in FIG. 18, when the ball 62 is slightly curved along the outer periphery, the familiarity between each side surface and the outer peripheral surface of the ball 62 is improved.

(Thirteenth Embodiment) As shown in FIG. 19, the inclined surfaces 53 and 54 described in the sixth embodiment
When slightly curved along the outer circumference of the
Of the ball 62 and the outer peripheral surface of the ball 62 are improved.

(Fourteenth Embodiment) Of the guide grooves 41 and 42 having the arc-shaped cross section in the first embodiment, for example, the guide groove 4
2 may not be formed, and may be a flat plate surface of the upper plate 2 as shown in FIG.

[0042]

As described above, according to the vehicular seat rotating apparatus of the present invention, the seat can be reliably positioned without any rotational play even if there is a manufacturing error in the device parts, and the strength of the device is improved. It is advantageous.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a rotating device according to a first embodiment of the present invention.

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

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a sectional view at the time of assembly.

FIG. 5 is an enlarged sectional view of a ball holding portion.

FIG. 6 is a sectional view of a rotating device according to a second embodiment of the present invention.

FIG. 7 is an overall perspective view of a resin ring.

FIG. 8 is a sectional view of a rotating device according to a third embodiment of the present invention.

FIG. 9 is a sectional view of a rotating device according to a fourth embodiment of the present invention.

FIG. 10 is a sectional view of a rotating device according to a fifth embodiment of the present invention.

FIG. 11 is an enlarged sectional view of a ball holding portion.

FIG. 12 is a sectional view of a rotating device according to a sixth embodiment of the present invention.

FIG. 13 is a sectional view of a rotating device according to a seventh embodiment of the present invention.

FIG. 14 is a sectional view of a rotating device according to an eighth embodiment of the present invention.

FIG. 15 is a sectional view of a rotating device according to a ninth embodiment of the present invention.

FIG. 16 is a sectional view of a rotating device according to a tenth embodiment of the present invention.

FIG. 17 is a sectional view of a rotating device according to an eleventh embodiment of the present invention.

FIG. 18 is a sectional view of a main part of a rotating device according to a twelfth embodiment of the present invention.

FIG. 19 is a sectional view of a principal part of a rotating device according to a thirteenth embodiment of the present invention.

FIG. 20 is a sectional view of a main part of a rotating device according to a fourteenth embodiment of the present invention.

FIG. 21 is a sectional view of a main part of a conventional rotating device.

FIG. 22 is a partial sectional side view of a conventional rotating device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Lower plate, 2 ... Upper plate, 3 ... Set plate, 51, 52 ... Guide groove (V-shaped groove), 53, 54
... Slope surface, 61,62 ... Ball (resistance reducing member), 6
3, 64, 65: resin ring (resistance reducing member).

Continuation of front page (72) Inventor Koji Inoue 1-1-1, Nittacho, Takahama-shi, Aichi Prefecture Inside Toyota Auto Body Seiko Co., Ltd.

Claims (9)

[Claims] 1. A ring-shaped upper plate fixed to a seat-side member of a vehicle, a ring-shaped lower plate fixed to a floor-side member of a vehicle, and holding the upper plate together with the lower plate. A set plate, a first resistance reducing member interposed between the upper plate and the lower plate to reduce frictional resistance between the two, and a first resistance reducing member interposed between the upper plate and the set plate. A second resistance reducing member for reducing frictional resistance of the vehicle, wherein the first resistance reducing member and the second resistance reducing member are separated from each other in and out of the rotating device. The first resistance reducing member positioned on the side where the seat load is input receives the sheet load input from the upper plate, and the second resistance reducing member receives the sheet load input from the upper plate. Vehicle sheet is characterized in that no rate to position without producing backlash - bets rotary device. 2. A ring-shaped upper plate fixed to a seat-side member of a vehicle, a ring-shaped lower plate fixed to a floor-side member of a vehicle, and holding the upper plate together with the lower plate. A set plate, a first resistance reducing member interposed between the upper plate and the lower plate to reduce frictional resistance between the two, and a first resistance reducing member fixed to one of the upper plate and the set plate, A second resistance reducing member for reducing frictional resistance of the vehicle, wherein the first resistance reducing member and the second resistance reducing member are separated from each other in and out of the rotating device. The first resistance reducing member positioned on the side where the seat load is input receives the sheet load input from the upper plate, and the second resistance reduction member receives the sheet load input from the upper plate. Vehicle is characterized in that no such position without producing looseness of the upper plate in wood sheet - DOO rotary device. 3. The first resistance reducing member and the second resistance reducing member.
When the lower plate and the set plate hold the upper plate via the resistance reducing member, the first resistance reducing member and the second resistance reducing member contact the upper plate at a predetermined pressure. 3. The rotating device for a vehicle sheet according to claim 1, wherein the rotating device is in contact with the vehicle. 4. The second resistance reducing member is in contact with an inclined surface formed on at least one of the opposing surfaces of the upper plate and the set plate and inclined in a radial direction of the upper plate and the set plate. Claim 1
4. The vehicle seat rotating apparatus according to any one of claims 3 to 3. 5. A ring-shaped lower plate fixed to a floor member of a vehicle, a ring-shaped upper plate fixed to a sheet-side member of a vehicle, and holding the lower plate together with the upper plate. A set plate; a first resistance reducing member interposed between the upper plate and the lower plate to reduce frictional resistance between the two; and a first resistance reducing member interposed between the lower plate and the set plate. A second resistance reducing member for reducing frictional resistance of the vehicle, wherein the first resistance reducing member and the second resistance reducing member are separated from each other in and out of the rotating device. The first resistance reduction member positioned on the side where the sheet load is input receives the sheet load input from the upper plate, and the second resistance reduction member controls the upper resistance by the second resistance reduction member. Vehicle sheet, characterized in that none of over preparative to position without producing backlash - bets rotary device. 6. A ring-shaped lower plate fixed to a vehicle floor-side member, a ring-shaped upper plate fixed to a vehicle seat-side member, and holding the lower plate together with the upper plate. A set plate; a first resistance reducing member interposed between the upper plate and the lower plate to reduce frictional resistance between the two; and a first resistance reducing member fixed to one of the lower plate and the set plate. A second resistance reducing member for reducing frictional resistance of the vehicle, wherein the first resistance reducing member and the second resistance reducing member are separated from each other in and out of the rotating device. The first resistance reducing member positioned on the side where the sheet load is input receives the sheet load input from the upper plate, and the second resistance reducing section In a vehicle sheet, characterized in that no such position without the upper plate resulting backlash - bets rotary device. 7. The first resistance reducing member and the second resistance reducing member.
When the lower plate is held between the upper plate and the set plate via the resistance reducing member, the first resistance reducing member and the second resistance reducing member contact the lower plate at a predetermined pressure. Claim 5 which is in contact with
Or a rotating device for a vehicle seat according to item 6. 8. The second resistance reducing member is in contact with an inclined surface formed on at least one of the opposing surfaces of the lower plate and the set plate and inclined in a radial direction of the lower plate and the set plate. A vehicle seat according to any one of claims 5 to 7, characterized in that:
Rotating device. 9. The vehicle seat rotating apparatus according to claim 4, wherein said inclined surface is formed by both side surfaces of a V-shaped groove.