JP2014024407A - Seat rotating mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to make a physical size of a rotating mechanism small and to facilitate smoothly rotating a seat main body.SOLUTION: A screw hole 30a centering around an axis C is formed in a slide table 30, and a through hole 40a centering around the axis C and larger in diameter than the screw hole 30a is formed in a rotary table 40. A sleeve 50 having an outer peripheral surface on which a screw 51a inserted into the through hole 40a and screwed with the screw hole 30a is formed, and covering an upper surface of the rotary table 40 is provided. Roller bearings 70 and 80 are provided among the rotary table 40, the slide table 30, and the sleeve 50. Inclined portions 42, 33, and 53 inclined with respect to the axis C and parallel to one another are formed on the rotary table 40, the slide table 30, and the sleeve 50, respectively. The roller bearings 70 and 80 are provided among these inclined portions 42, 33, and 53.

Description

  The present invention relates to a seat rotation mechanism that is applied to a vehicle seat device and that rotates a seat body about an axis extending in the up-down direction.

  Conventionally, for example, there is a sheet rotation mechanism described in Patent Document 1. The seat rotation mechanism described in Patent Document 1 includes a support member (slide member) provided in the vehicle main body, and a rotation provided above the support member and rotatably supported about the rotation axis by the support member. A member (rotary table) is provided, and the seat main body is rotated with respect to the vehicle main body together with the rotary member (rotary table).

  Specifically, the inner ring is fixed on the upper surface of the support member, the outer ring is fixed on the lower surface of the rotating member, and the receiving groove formed on the outer peripheral surface of these inner rings and the inner peripheral surface of the outer ring are formed. A plurality of balls are provided so as to roll between the receiving grooves.

  According to such a seat rotation mechanism, the play of the rotating member can be reduced by appropriately setting the position of the ball by the receiving groove of the inner ring and the receiving groove of the outer ring.

Japanese Patent Laid-Open No. 2003-80981

  By the way, in the seat rotation mechanism described in Patent Document 1, when a dimensional error occurs between the groove of the inner ring and the groove of the outer ring, the rotation between the inner ring and the outer ring and the ball, that is, the support member and the rotation. A rattle occurs between the members. Therefore, high precision is required for processing the receiving groove of the inner ring and the receiving groove of the outer ring, and the processing is time-consuming.

  Further, since an inner ring and an outer ring thicker than the diameter of the ball are interposed between the upper surface of the support member and the lower surface of the rotating member, it is difficult to reduce the size of the rotating mechanism in the vertical direction.

  An object of the present invention is to provide a sheet rotation mechanism that can reduce the size of the rotation mechanism and can easily rotate the sheet body smoothly.

  In order to achieve the above object, a seat rotation mechanism according to the present invention is supported by a support member mounted on a vehicle main body and a support member that is fixed to the lower surface of the seat main body and rotatable about an axis extending in the vertical direction. And the sheet body is rotated about the axis. In the rotation mechanism of the sheet, the support member is formed with a screw hole centered on the axis, and the rotation member is formed with a hole centered on the axis and having a larger diameter than the screw hole. A sleeve that is inserted into the through-hole and has a screw that is screwed into the screw hole is formed on the outer peripheral surface and covers a top surface of the rotating member, and is provided between the rotating member, the support member, and the sleeve. A rolling bearing is provided, and at least one of the rotating member, the support member, and the sleeve is inclined with respect to the axis and is formed in parallel with each other, and the rolling bearing is provided between these inclined portions. .

  According to this aspect, the support member and the sleeve are screwed together, and the rolling bearing is provided between the inclined portion formed on at least one of the support member and the sleeve and the inclined portion of the rotating member. For this reason, the rolling bearing provided between these inclined portions can be accurately received while suitably dispersing the load acting in the vertical direction and the horizontal direction. In addition, since only the rolling elements constituting the rolling bearing are interposed between the upper surface of the support member and the lower surface of the rotating member, the physique of the rotating mechanism becomes small. Moreover, the force with which each rolling element is pressed by the rotating member, the supporting member, and the sleeve can be adjusted by adjusting the tightening amount of the screw of the sleeve. For this reason, even if there is variation in dimensional accuracy among the component parts, the sliding resistance of each rolling element can be set appropriately.

Therefore, according to the present invention, the size of the rotation mechanism can be reduced, and the seat body can be easily rotated smoothly.
In this case, it is preferable that the inclined portion is formed on both the support member and the sleeve, and the rolling bearing is provided between the inclined portions.

  According to this aspect, even when the variation in the dimensional accuracy of each inclined portion in the rotating member, the support member, and the sleeve is large to some extent, the variation is suitably absorbed by appropriately elastically deforming each inclined portion. The Therefore, the rotating member is rotated more smoothly, and the seat body can be rotated more smoothly.

  In addition, it is possible to adopt a mode in which the rolling bearing is provided between flat portions perpendicular to the direction in which the axis extends in at least one of the rotating member, the support member, and the sleeve.

  In these cases, the rolling bearing is provided between both the inclined portion of the rotating member and at least one inclined portion of the support member and the sleeve, and between the flat portion extending from these inclined portions and orthogonal to the direction in which the axis extends. An aspect such as being provided is preferable.

  According to this aspect, for example, between the rotating member and the support member, the rolling elements constituting the rolling bearing are provided between these inclined portions as well as between these inclined portions. For this reason, shakiness of the rotating member with respect to the support member can be accurately suppressed. Therefore, the seat body can be stably supported.

  In order to achieve the above object, the seat rotation mechanism according to the present invention can be rotated by a support member mounted on the vehicle main body, and an axis fixed to the lower surface of the seat main body and extending vertically. And a seat body is rotated about the axis. The rotating member is formed with a screw hole centered on the axis, and the support member is formed with a hole centered on the axis and having a diameter larger than the screw hole, and is inserted into the through hole. And a sleeve formed on the outer peripheral surface of a screw screwed into the screw hole and covering the lower surface of the support member, and a rolling bearing is provided between the support member, the rotating member, and the sleeve, At least one of the support member, the rotating member, and the sleeve is inclined with respect to the axis and parallel to each other, and the rolling bearing is provided between the inclined portions.

  According to this configuration, the rotating member and the sleeve are screwed together, and the rolling bearing is provided between the inclined portion formed on at least one of the rotating member and the sleeve and the inclined portion of the support member. For this reason, the rolling bearing provided between these inclined portions can be accurately received while suitably dispersing the load acting in the vertical direction and the horizontal direction. In addition, since only the rolling elements constituting the rolling bearing are interposed between the upper surface of the support member and the lower surface of the rotating member, the physique of the rotating mechanism becomes small. Moreover, the force with which each rolling element is pressed by the supporting member, the rotating member, and the sleeve can be adjusted by adjusting the tightening amount of the sleeve. For this reason, even if there is variation in dimensional accuracy among the component parts, the sliding resistance of each rolling element can be set appropriately.

Therefore, according to the present invention, the size of the rotation mechanism can be reduced, and the seat body can be easily rotated smoothly.
In this case, it is preferable that the inclined portion is formed on both the rotating member and the sleeve, and the rolling bearing is provided between the inclined portions.

  According to this aspect, even when the variation in dimensional accuracy of each inclined portion in the support member, the rotating member, and the sleeve is large to some extent, the variation is suitably absorbed by the elastic deformation of each inclined portion as appropriate. The Therefore, the rotating member is rotated more smoothly, and the seat body can be rotated more smoothly.

  In addition, it is possible to adopt a mode in which the rolling bearing is provided between flat portions orthogonal to the extending direction of the axis in at least one of the support member, the rotating member, and the sleeve.

  In these cases, the rolling bearing is provided between the inclined portion of the support member and at least one inclined portion of the rotating member and the sleeve, and between the flat portion extending from the inclined portion and orthogonal to the extending direction of the axis. An aspect such as being provided is preferable.

  According to this aspect, for example, between the support member and the rotating member, the rolling elements constituting the rolling bearing are provided between these inclined portions as well as between these inclined portions. For this reason, shakiness of the rotating member with respect to the support member can be accurately suppressed. Therefore, the seat body can be stably supported.

  In order to achieve the above object, the seat rotation mechanism according to the present invention can be rotated by a support member mounted on the vehicle main body, and an axis fixed to the lower surface of the seat main body and extending vertically. And a seat body is rotated about the axis. The support member is formed with a through hole centered on the axis, the rotating member is formed with a sleeve portion inserted through the through hole, and a screw centered on the axis is formed on the outer peripheral surface of the sleeve portion. A cover member formed to cover the lower surface of the support member and formed with a screw hole to be screwed into the screw; a rolling bearing is provided between the support member, the rotating member, and the cover member; At least one of the rotating member and the covering member is inclined with respect to the axis and parallel to each other, and the rolling bearing is provided between the inclined portions.

  According to this aspect, the sleeve portion of the rotating member and the covering member are screwed together, and the rolling bearing is provided between the inclined portion formed on at least one of the rotating member and the covering member and the inclined portion of the support member. It is done. For this reason, the rolling bearing provided between these inclined portions can be accurately received while suitably dispersing the load acting in the vertical direction and the horizontal direction. In addition, since only the rolling elements constituting the rolling bearing are interposed between the upper surface of the support member and the lower surface of the rotating member, the physique of the rotating mechanism becomes small. Moreover, the force by which each rolling element is pressed by the support member, the rotating member, and the covering member can be adjusted by adjusting the tightening amount of the covering member. For this reason, even if there is variation in dimensional accuracy among the component parts, the sliding resistance of each rolling element can be set appropriately.

Therefore, according to the present invention, the size of the rotation mechanism can be reduced, and the seat body can be easily rotated smoothly.
In order to achieve the above object, the seat rotation mechanism according to the present invention can be rotated by a support member mounted on the vehicle main body, and an axis fixed to the lower surface of the seat main body and extending vertically. And a seat body is rotated about the axis. The rotating member is formed with a through hole centered on the axis, the support member is formed with a sleeve portion inserted through the through hole, and a screw centered on the axis is formed on the outer peripheral surface of the sleeve portion. A covering member formed to cover the upper surface of the rotating member and formed with a screw hole to be screwed into the screw; a rolling bearing is provided between the rotating member, the support member, and the covering member; At least one of the support member and the covering member is inclined with respect to the axis and parallel to each other, and the rolling bearing is provided between the inclined portions.

  According to this aspect, the sleeve portion of the support member and the covering member are screwed together, and the rolling bearing is provided between the inclined portion formed on at least one of the supporting member and the covering member and the inclined portion of the rotating member. It is done. For this reason, the rolling bearing provided between these inclined portions can be accurately received while suitably dispersing the load acting in the vertical direction and the horizontal direction. In addition, since only the rolling elements constituting the rolling bearing are interposed between the upper surface of the support member and the lower surface of the rotating member, the physique of the rotating mechanism becomes small. Moreover, the force with which each rolling element is pressed by the rotating member, the supporting member, and the covering member can be adjusted by adjusting the tightening amount of the covering member. For this reason, even if there is variation in dimensional accuracy among the component parts, the sliding resistance of each rolling element can be set appropriately.

Therefore, according to the present invention, the size of the rotation mechanism can be reduced, and the seat body can be easily rotated smoothly.
Further, it is preferable that the rolling bearing is constituted by a roller bearing. In this case, even if the variation in the dimensional accuracy of each inclined portion in the support member, the rotating member, and the sleeve is large to some extent, if the rolling bearing is a roller bearing, each inclined portion is elastically deformed appropriately with the roller interposed therebetween. By doing so, the variation is suitably absorbed. Therefore, the rotating member is rotated more smoothly, and the seat body can be rotated more smoothly.

The schematic diagram which shows the arrangement | positioning aspect of the vehicle seat containing the front passenger seat to which the rotation mechanism of the seat of 1st Embodiment was applied. FIG. 4 is a side view of the seat device in a state where the passenger seat is lowered outside the vehicle according to the embodiment. The longitudinal cross-sectional view which shows the longitudinal cross-section of the sheet | seat apparatus centering on the rotation mechanism of the sheet | seat of the embodiment. FIG. 4 is an enlarged view showing a portion A of FIG. 3, and is an enlarged cross-sectional view showing an enlarged vertical cross-sectional structure of one end in the width direction of the slide mechanism of the embodiment. FIG. 4 is an enlarged view showing a B portion of FIG. 3, and an enlarged cross-sectional view showing an enlarged longitudinal cross-sectional structure of one end in the width direction of the sheet rotation mechanism of the same embodiment; (A) is a perspective view which shows the perspective structure of the holder | retainer in the embodiment, (b) is a fragmentary sectional view which shows the partial cross-section of the roller unit in the embodiment. The expanded sectional view which expands and shows the longitudinal cross-section of the end in the width direction of the rotation mechanism of the sheet | seat of 2nd Embodiment. The expanded sectional view which expands and shows the longitudinal cross-section of the end in the width direction of the rotation mechanism of the rotation mechanism of the sheet | seat of a modification. The expanded sectional view which expands and shows the longitudinal cross-section structure of the end in the width direction of the rotation mechanism of the sheet | seat rotation mechanism of another modification. The expanded sectional view which expands and shows the longitudinal cross-section structure of the end in the width direction of the rotation mechanism of the sheet | seat rotation mechanism of another modification. The expanded sectional view which expands and shows the longitudinal cross-section structure of the end in the width direction of the rotation mechanism of the sheet | seat rotation mechanism of another modification. The expanded sectional view which expands and shows the longitudinal cross-section structure of the end in the width direction of the rotation mechanism of the sheet | seat rotation mechanism of another modification. The expanded sectional view which expands and shows the longitudinal cross-section structure of the end in the width direction of the rotation mechanism of the sheet | seat rotation mechanism of another modification. The expanded sectional view which expands and shows the longitudinal cross-section structure of the end in the width direction of the rotation mechanism of the sheet | seat rotation mechanism of another modification.

<First Embodiment>
A first embodiment of the present invention will be described below with reference to FIGS.
As shown in FIGS. 1 and 2, the passenger seat of the vehicle has a slide mechanism 4 that slides the seat body 3 along a substantially horizontal direction, and an axis that extends along the substantially vertical direction with respect to the vehicle body 1. A sheet device 2 including a rotation mechanism 5 that rotates the sheet main body 3 and an elevating mechanism 6 that raises and lowers the sheet main body 3 is provided.

  As shown in FIG. 2, an inner rail 20 is fixed to the vehicle body 1, and a slide table 30 is supported on the inner rail 20 so as to be slidable along the substantially horizontal direction with respect to the vehicle body 1. Yes. The inner rail 20 and the slide table 30 constitute the slide mechanism 4.

  A rotating table 40 is supported on the slide table 30 so as to be rotatable about the axis with respect to the vehicle body 1. The slide table 30 and the rotary table 40 constitute the rotation mechanism 5.

  An elevating mechanism 6 for elevating and lowering the sheet main body 3 is provided on the rotary table 40, and the elevating mechanism 6 raises and lowers the sheet main body 3 between a state indicated by a solid line and a state indicated by a one-dot chain line in the drawing. Is done.

Next, the structure of the slide mechanism 4 will be described in detail with reference to FIGS. 3 and 4.
As shown in FIG. 3, the inner rail 20 is bent from both ends of the flat rail body 21 and the width direction of the rail body 21 (the left-right direction in FIGS. 3 and 4), extends upward, and further bends. And an extended portion 23 extending outward in the width direction, and a bent portion 22 that is bent from an end portion of the extended portion 23 and extends obliquely downward and has a V-shaped cross section.

  As shown in FIG. 4, the bent portion 22 is composed of a pair of inclined portions (a lower inclined portion 22a and an upper inclined portion 22b) arranged in parallel along the vertical direction, and these inclined portions 22a and 22b are in the width direction. It inclines so that it may mutually adjoin to the up-down direction toward the outer side.

  As shown in FIG. 3, the slide table 30 includes a flat table main body 31 and a bent portion 32 which is bent from both ends in the width direction of the table main body 31 and extends obliquely downward and has a transverse V-shaped cross section. Have.

  As shown in FIG. 4, the bent portion 32 is constituted by a pair of inclined portions (a lower inclined portion 32a and an upper inclined portion 32b) arranged in parallel along the vertical direction, and these inclined portions 32a and 32b are in the width direction. It inclines so that it may mutually adjoin to a perpendicular direction toward the outer side.

  The inner rail 20 and the slide table 30 have a pair of inclined portions 22a, 22b, 32a, and 32b facing each other. That is, the pair of inclined portions 22 a and 22 b of the inner rail 20 are covered from the outside in the width direction by the pair of inclined portions 32 a and 32 b of the slide table 30. Both the end portion of the inner rail 20 and the end portion of the slide table 30 are positioned between the rail main body 21 of the inner rail 20 and the table main body 31 of the slide table 30 in the vertical direction.

Incidentally, both the inner rail 20 and the slide table 30 are formed by bending a plate material made of a metal material (for example, iron-based material).
As shown in FIG. 4, a roller unit 60 is provided between the pair of inclined portions 22 a and 22 b of the inner rail 20 and the pair of inclined portions 32 a and 32 b of the slide table 30.

Here, the configuration of the roller unit 60 will be described.
Between the lower inclined portion 22a of the inner rail 20 and the lower inclined portion 32a of the slide table 30, a plurality of rollers 61a extend along the slide direction of the slide table 30 (direction orthogonal to the paper surface of FIG. 4). A roller group 61 is provided.

  A roller group 61 including a plurality of rollers 61 a is provided between the upper inclined portion 22 b of the inner rail 20 and the upper inclined portion 32 b of the slide table 30 along the slide direction of the slide table 30.

  The roller group 61 is held by a common holder 63. The cage 63 extends along the sliding direction and has a horizontal V-shaped cross section. The retainer 63 is formed with a plurality of receiving holes (not shown) along the sliding direction.

  The inner rail 20 and the slide table 30 are provided with a hook 90 on one end side in the width direction. The hook 90 includes a bent portion 91 that covers the bent portion 32 of the slide table 30 from the outside in the width direction, and an extending portion 92 that is bent from the upper end of the bent portion 91 and extends inward in the width direction. The inner surface of the bent portion 91 is in contact with the outer surface of the bent portion 32 of the slide table 30. The lower surface of the extending portion 92 is in contact with the upper surface of the end portion in the width direction of the table main body 31.

  A folded portion 93 is bent from the lower end of the bent portion 91 and extends inward in the width direction. The folded portion 93 causes the end portion of the bent portion 22 of the inner rail 20 and the end portion of the bent portion 32 of the slide table 30 to be connected. Both sides are covered. Further, the folded portion 93 is folded inside the bent portion 22 of the inner rail 20. Here, a gap is formed between the folded portion 93 and the bent portion 22 of the inner rail 20, and the hook 90 and the inner rail 20 are not in contact with each other.

The length of the hook 90 in the sliding direction is shorter than that of the slide table 30.
Incidentally, the hook 90 is formed by bending a plate material made of a metal material (for example, iron-based material).

  The hook 90 is externally fitted from one end side in the sliding direction of the assembly in which the inner rail 20 and the slide table 30 are assembled, and is fixed to the slide table 30 by spot welding.

Next, the structure of the rotation mechanism 5 will be described in detail with reference to FIGS. 3 and 5.
As shown in FIG. 3, the table body 31 of the slide table 30 is formed with a screw hole 30a centering on an axis C extending in the vertical direction. In addition, the table body 31 is formed with an inclined portion 33 that extends downwardly as it approaches the screw hole 30a, and is bent from the inner peripheral side end portion of the inclined portion 33 so as to be on the inner peripheral side. An extending portion 34 extending in the direction is formed. The threaded hole 30a is formed in the extended portion 34.

  The rotary table 40 has a flat table main body 41, and the table main body 41 is formed with a through hole 40 a centering on the axis C. The diameter of the through hole 40 a is larger than the screw hole 30 a of the slide table 30. In addition, the table body 41 is formed with an inclined portion 42 that extends downward and inclines toward the perimeter of its own through hole 40a. The inclined portion 42 and the inclined portion 33 of the slide table 30 are provided in parallel to each other.

  A screw 51 a of a base end portion 51 of a sleeve 50 having a substantially annular shape is screwed into the screw hole 30 a of the slide table 30. The base end portion 51 is inserted into the through hole 40 a, and an inclined portion 53 that is bent from the upper end portion thereof and extends in parallel with the inclined portion 42 of the rotary table 40 is formed, and is bent from the upper end portion of the inclined portion 53. An extending portion 54 extending outward in the width direction is formed. The inclined portion 53 and the extending portion 54 function as a covering portion 52 that covers the upper surface of the rotary table 40.

As shown in FIG. 5, a roller bearing 70 is provided between the rotary table 40 and the slide table 30.
Here, the configuration of the roller bearing 70 will be described.

  In a facing space between the inclined portion 42 of the rotary table 40 and the inclined portion 33 of the slide table 30, a roller group 71 including a plurality of rollers 71 a positioned along the circumferential direction of the screw hole 30 a is provided. A roller group 71 is configured by a plurality of rollers 71 a positioned along the circumferential direction of the screw hole 30 a in the space between the table main body 41 of the rotary table 40 and the table main body 31 of the slide table 30. Further, a holder 73 that holds the roller group 71 is provided in the facing space.

  A roller bearing 80 is provided in the space between the rotary table 40 and the sleeve 50. Specifically, in a facing space between the inclined portion 42 of the rotary table 40 and the inclined portion 53 of the sleeve 50, a roller group 81 is configured by a plurality of rollers 81a positioned along the circumferential direction of the through hole 40a. . Further, a holder 83 that holds the roller group 81 is provided in the facing space.

Here, the structure of the roller bearing 70 will be described with reference to FIG.
As shown in FIG. 6A, the retainer 73 has a substantially annular shape, and the diameter of the retainer 73 decreases toward the lower side. The upper end of the inclined portion 74 is bent and extends in the horizontal direction, and includes a table main body 41 of the rotary table 40 and a flat portion 75 parallel to the table main body 31 of the slide table 30. A plurality of receiving holes 76 are formed in the inclined portion 74 and the flat portion 75 at equal angular intervals along the circumferential direction.

  As shown in FIG. 6B, the inner side surface 76a of the accommodation hole 76 has a circular arc shape along the outer peripheral surface of the roller 71a. The cage 73 is formed of a hard synthetic resin having excellent wear resistance, and the roller 71a can be inserted into the accommodation hole 76 by elastically deforming the edge of the accommodation hole 76. The edge of 76 prevents the roller 71a from coming out of the accommodation hole 76.

  The cage 83 basically has the same shape as the inclined portion 74 of the cage 73, and a plurality of accommodation holes are arranged at equal angular intervals along the circumferential direction in the same manner as the accommodation holes 76. Is formed.

The sectional structure of the accommodation holes of the cages 63 and 83 is the same as the sectional structure of the cage 73 shown in FIG.
When assembling the rotating mechanism 5, the roller bearing 70 is placed on the upper surface of the slide table 30, the rotating table 40 is placed on the upper surface of the roller bearing 70, and the roller bearing 80 is placed on the upper surface of the rotating table 40. Put. Then, the base end portion 51 of the sleeve 50 is inserted from above the roller bearing 80, and the screw 51 a is screwed into the screw hole 30 a of the slide table 30. At this time, the tightening amount of the screw 51a of the sleeve 50 is appropriately set so that the sliding resistance of the rollers 71a and 81a has an appropriate magnitude.

Next, the operation of the rotation mechanism 5 of this embodiment will be described.
Roller bearings 70 and 80 are provided in opposing spaces between the inclined portions 33 and 53 formed on both the slide table 30 and the covering portion 52 of the sleeve 50 and the inclined portion 42 of the rotary table 40. For this reason, the roller bearings 70 and 80 can accurately receive the load acting in the vertical direction and the horizontal direction while suitably dispersing them.

  Since only the roller group 71 constituting the roller bearing 70 is interposed between the upper surface of the slide table 30 and the lower surface of the rotary table 40, a rolling element such as a roller is provided between the slide table and the rotary table. Compared with a configuration in which an inner ring and an outer ring thicker than the diameter are interposed, the physique in the vertical direction of the rotating mechanism 5 can be reduced.

  Further, by adjusting the tightening amount of the screw 51a of the sleeve 50, the force with which the roller groups 71 and 81 are pressed by the rotary table 40, the slide table 30, and the sleeve 50 can be adjusted. For this reason, even when there are variations in dimensional accuracy among the components such as the slide table 30, the rotary table 40, and the sleeve 50, the sliding resistance of the rollers 71a and 81a can be set appropriately. The sleeve 50 and the rotary table 40 are fixed to each other by welding or the like after the tightening amount of the screw 51a of the sleeve 50 is adjusted.

  Further, even if the variation in dimensional accuracy of each inclined portion 33, 42, 53 is large to some extent, the variation is suitably absorbed by the elastic deformation of each inclined portion 33, 42, 53 as appropriate. The rotary table 40 is smoothly rotated.

According to the sheet rotation mechanism according to the present embodiment described above, the following effects can be obtained.
(1) The slide table 30 is formed with a screw hole 30a centered on the axis C, and the rotary table 40 is formed with a hole centered on the axis C and having a larger diameter than the screw hole 30a. ing. A sleeve 50 that is inserted into the through hole 40 a and has a screw 51 a that is screwed into the screw hole 30 a is formed on the outer peripheral surface and covers the upper surface of the rotary table 40. Roller bearings 70 and 80 are provided between the rotary table 40 and the slide table 30 and the sleeve 50. Both the rotary table 40, the slide table 30 and the sleeve 50 are formed with inclined portions 42, 33 and 53 which are inclined with respect to the axis C and parallel to each other. In addition, roller bearings 70 and 80 are provided between the inclined portions 42, 33 and 53. According to such a configuration, the size of the rotating mechanism 5 in the vertical direction can be reduced, and the seat body 3 can be easily rotated smoothly.

  (2) Even if the variation in dimensional accuracy of the inclined portions 42, 33, 53 (particularly the variation in the circumferential direction of the screw holes 30a, 40a) is large to some extent, the inclined portions 42, 33, 53 are appropriately elastic. Since the variation is suitably absorbed by the deformation, the rotary table 40 is smoothly rotated, and the sheet main body 3 can be smoothly rotated.

  (3) Table main bodies 41 and 31 (planar portions) between the inclined portion 42 of the rotary table 40 and the inclined portion 33 of the slide table 30 and extending from the inclined portions 42 and 33 and orthogonal to the direction in which the axis C extends. Roller bearings 70 are provided on both sides. According to such a configuration, for example, between the rotating member and the support member, the roller 71a constituting the roller bearing 70 is provided between these inclined portions as well as between these inclined portions. For this reason, rattling of the rotary table 40 with respect to the slide table 30 can be accurately suppressed. Therefore, the sheet body 3 can be stably supported.

Second Embodiment
Next, the structure of the rotation mechanism 105 according to the second embodiment of the present invention will be described with reference to FIG.

Hereinafter, the difference from the first embodiment will be mainly described.
As shown in FIG. 7, in the rotation mechanism 105 of the present embodiment, the slide table 130 is formed with a through hole 130a, and the rotation table 140 is formed with a screw hole 140a, which is largely different from the first embodiment. It is different.

In other words, the table main body 131 of the slide table 130 is formed with an inclined portion 133 that extends and inclines upward as it comes closer to the through hole 130a.
The table main body 141 of the rotary table 140 is formed with an inclined portion 142 that extends upwardly as it approaches the screw hole 140a, and is bent from the inner peripheral side end of the inclined portion 142. An extending portion 143 extending to the inner peripheral side is formed. The threaded hole 140a is formed in the extended portion 143.

  A spiral screw 151 a is formed on the outer peripheral surface of the distal end portion 151 of the sleeve 150, and this screw 151 a is screwed into the screw hole 140 a of the rotary table 140. The sleeve 150 is formed with an inclined portion 153 that is bent from the lower end portion of the distal end portion 151 and extends in parallel with the inclined portion 133 of the slide table 130, and is extended from the lower end portion of the inclined portion 153 to extend outward in the width direction. A portion 154 is formed. The inclined portion 153 and the extending portion 154 function as a covering portion 152 that covers the lower surface of the slide table 130.

A roller bearing 170 is provided in the space between the rotary table 140 and the slide table 130.
The roller bearing 170 includes a roller group 171 configured by a plurality of rollers 171 a positioned along the circumferential direction of the through hole 130 a in a space between the inclined portion 142 of the rotary table 140 and the inclined portion 133 of the slide table 130. Is provided. Further, a roller group 171 configured by a plurality of rollers 171a positioned along the circumferential direction of the through hole 130a is provided in the space between the table bodies 131 and 141 of the tables 130 and 140. Further, a holder 173 for holding the roller group 171 is provided.

  A roller bearing 180 is provided in the space between the slide table 130 and the sleeve 150. The roller bearing 180 includes a roller group 181 configured by a plurality of rollers 181a positioned along the circumferential direction of the screw hole 30a in a space between the inclined portion 133 of the slide table 130 and the inclined portion 153 of the sleeve 150. A holder 183 that holds the roller group 181 is provided. The cage 173 has a shape according to the shape of the cage 73 of the first embodiment. The cage 183 has a shape that is similar to the shape of the cage 83 of the first embodiment.

Next, the operation of the rotation mechanism 105 of this embodiment will be described.
Roller bearings 170 and 180 are provided in spaces facing the inclined portions 142 and 153 formed on both the rotary table 140 and the covering portion 152 of the sleeve 150 and the inclined portion 133 of the slide table 130. For this reason, the roller bearings 170 and 180 can accurately receive the load acting in the vertical direction and the horizontal direction while suitably dispersing.

  Since only the roller group 181 constituting the roller bearing 180 is interposed between the upper surface of the slide table 130 and the lower surface of the rotary table 140, a rolling element such as a roller is provided between the slide table and the rotary table. Compared with a configuration in which an inner ring and an outer ring thicker than the diameter are interposed, the physique in the vertical direction of the rotation mechanism 105 can be reduced.

  Further, by adjusting the tightening amount of the screw 151a of the sleeve 150, the force with which the roller groups 171 and 181 are pressed by the rotary table 140, the slide table 130, and the sleeve 150 can be adjusted. For this reason, even when there are variations in dimensional accuracy among the components such as the slide table 130, the rotary table 140, and the sleeve 150, the sliding resistance of the rollers 171a and 181a can be set appropriately.

  Further, even if the variation in dimensional accuracy of the inclined portions 133, 142, and 153 is large to some extent, the unevenness is suitably absorbed by appropriately elastically deforming the inclined portions 133, 142, and 153. The rotary table 140 is smoothly rotated.

According to the sheet rotation mechanism according to the present embodiment described above, the effects according to the effects (1) and (2) of the first embodiment can be obtained.
<Modification>
The sheet rotation mechanism according to the present invention is not limited to the configuration exemplified in the above embodiment, and may be implemented as, for example, the following forms appropriately modified.

  In place of the rotation mechanism 5 illustrated in the first embodiment (see FIG. 5), in the roller group 71 constituting the roller bearing 70, between the table main body 41 of the rotary table 40 and the table main body 31 of the slide table 30. A configuration may be adopted in which the roller group 71 provided in is omitted.

  -Moreover, the rotation mechanism 205 provided with the roller bearings 270 and 280 as shown in FIG. 8 is also employable. That is, in the same manner as in the above modification, a roller group 271 is provided between the inclined portion 42 of the rotary table 40 and the inclined portion 33 of the slide table 30, and the table main body 41 of the rotary table 40 and the table main body of the slide table 30. No roller group is provided between 31 and 31. Further, unlike the above modification, a roller group 281 is provided between the table body 41 of the rotary table 40 and the extended portion 54 of the sleeve 50, and the inclined portion 42 of the rotary table 40 and the inclined portion 53 of the sleeve 50 are provided. There is no roller group in between. Here, the table main body 41 of the rotary table 40 functions as a planar portion according to the present invention.

  -It can replace with the rotation mechanism 5 illustrated in the said 1st Embodiment, and can also employ | adopt the rotation mechanism 305 provided with the roller bearings 370 and 80 as shown in FIG. That is, a roller group 371 is provided between the table main body 41 of the rotary table 40 and the table main body 31 of the slide table 30, and a roller is provided between the inclined portion 42 of the rotary table 40 and the inclined portion 33 of the slide table 30. There are no groups. Here, the table main body 41 of the rotary table 40 functions as a planar portion according to the present invention.

  A roller group provided between the table body 141 of the rotary table 140 and the table body 131 of the slide table 130 in the roller group 171 constituting the roller bearing 170 instead of the rotation mechanism 105 exemplified in the second embodiment. 171 may be omitted.

  -Moreover, the rotation mechanism 405 provided with the roller bearings 470 and 480 as shown in FIG. 10 is also employable. That is, in the same manner as in the above modification, a roller group 471 is provided between the inclined portion 142 of the rotary table 140 and the inclined portion 133 of the slide table 130, and the table main body 141 of the rotary table 140 and the table main body of the slide table 130 are provided. No roller group is provided between 131 and 131. Further, a roller group 481 is provided between the table main body 141 of the rotary table 140 and the extending portion 154 of the sleeve 150, and the roller group is provided between the inclined portion 142 of the rotary table 140 and the inclined portion 153 of the sleeve 150. Not provided. Here, the table main body 131 of the slide table 130 functions as a flat portion according to the present invention.

  -It can replace with the rotation mechanism 105 illustrated in the said 2nd Embodiment, and can also employ | adopt the rotation mechanism 505 provided with the roller bearings 570 and 180 as shown in FIG. That is, a roller group 571 is provided between the table main body 141 of the rotary table 140 and the table main body 131 of the slide table 130, and a roller is provided between the inclined portion 142 of the rotary table 140 and the inclined portion 133 of the slide table 130. There are no groups. Here, the table main body 131 of the slide table 130 functions as a flat portion according to the present invention.

  In each of the above-described embodiments and the modifications thereof, the rotation mechanism is exemplified for the slide table, the rotation table, and the sleeve each including the inclined portions that are parallel to each other, but the present invention is not limited to this. For example, as shown in FIG. 12, the sleeve 650 may be a rotating mechanism 605 that does not have an inclined portion.

Hereinafter, the difference from the second embodiment will be mainly described.
That is, as shown in FIG. 12, the table main body 631 of the slide table 630 is formed with an inclined portion 633 that extends and inclines downward as it comes closer to the through hole 630a.

  The table main body 641 of the rotary table 640 is formed with an inclined portion 642 that extends downwardly as it approaches the screw hole 640a, and is bent from the inner peripheral side end of the inclined portion 642. An extending portion 643 extending to the inner peripheral side is formed. The screw hole 640a is formed in the extended portion 643.

The sleeve 650 is formed with a covering portion 652 that extends outward in the width direction and covers the lower surface of the slide table 630.
A roller bearing 670 is provided in a space between the inclined portion 642 of the rotary table 640 and the inclined portion 633 of the slide table 630. A roller bearing 680 is provided in a space between the extended portion 634 of the slide table 630 and the covering portion 652 of the sleeve 650.

Here, the table main body 631 of the slide table 630 functions as a planar portion according to the present invention.
In the second embodiment and the modification thereof, the distal end portion 151 of the sleeve 150 is inserted into the through hole 130a of the slide table 130, and the screw 151a formed on the distal end portion 151 is the screw hole of the rotary table 140. The rotation mechanism 105 screwed to 140a has been illustrated. Instead, as shown in FIG. 13, the sleeve portion 745 of the rotary table 740 is inserted into the through hole 730 a of the slide table 730, and the screw 746 formed on the outer peripheral surface of the distal end portion of the sleeve portion 745. The rotation mechanism 705 may be screwed into the screw hole 751a of the covering member 750.

Hereinafter, the difference from the second embodiment will be mainly described.
That is, as shown in FIG. 13, the table main body 731 of the slide table 730 is formed with an inclined portion 733 that extends and inclines downward as it comes closer to the through hole 730 a.

  The table main body 741 of the rotary table 740 is formed with an inclined portion 742 extending inclined downward toward the inner peripheral side. Further, a sleeve portion 745 that is bent from the inner peripheral side end portion of the inclined portion 742 and extends downward is formed. A screw 746 is formed on the outer peripheral surface of the sleeve portion 745.

  The covering member 750 has an inclined portion 753 extending along the inclined portion 733 of the slide table 730 and an extending portion 751 extending from the inner peripheral side end of the inclined portion 753 toward the inner peripheral side. The lower surface of the slide table 730 is covered. Further, a screw hole 751 a that is screwed into the screw 746 is formed in the extended portion 751.

  Here, a roller bearing 770 is provided between the upper surface of the table main body 731 of the slide table 730 and the lower surface of the table main body 741 of the rotary table 740. A roller bearing 780 is provided between the inclined portion 733 of the slide table 730 and the inclined portion 753 of the covering member 750.

  The arrangement of the roller bearings is not limited to this. For example, instead of or in addition to the upper surface of the table main body 731 of the slide table 730 and the lower surface of the table main body 741 of the rotary table 740, a slide slide A roller bearing may be provided between the inclined portion 733 of the table 730 and the inclined portion 742 of the rotary table 740.

  In the first embodiment and the modification thereof, the base end portion 51 of the sleeve 50 is inserted into the through hole 40 a of the rotary table 40, and the screw 51 a formed on the base end portion 51 is connected to the slide table 30. The rotation mechanism 5 screwed into the screw hole 30a is illustrated. Instead, as shown in FIG. 14, the sleeve portion 835 of the slide table 830 is inserted into the through hole 840 a of the rotary table 840, and a screw 836 formed on the outer peripheral surface of the distal end portion of the sleeve portion 835. The rotation mechanism 805 may be screwed into the screw hole 851a of the covering member 850.

Hereinafter, the difference from the first embodiment will be mainly described.
That is, as shown in FIG. 14, the table main body 841 of the rotary table 840 is formed with an inclined portion 842 that extends and inclines upward as it comes closer to the through hole 840a.

  The table main body 831 of the slide table 830 is formed with an inclined portion 833 that extends and inclines upward as it approaches the axis C. In addition, a sleeve portion 835 that is bent from the inner peripheral side end portion of the inclined portion 833 and extends upward is formed. A screw 836 is formed on the outer peripheral surface of the sleeve portion 835.

  The covering member 850 includes an inclined portion 853 extending along the inclined portion 842 of the rotary table 840 and an extending portion 851 extending from the inner peripheral side end of the inclined portion 853 toward the inner peripheral side. The upper surface of the turntable 840 is covered. The extension portion 851 is formed with a screw hole 851a that is screwed into the screw 836.

  Here, a roller bearing 870 is provided between the upper surface of the table main body 831 of the slide table 830 and the lower surface of the table main body 841 of the rotary table 840. Further, a roller bearing 880 is provided between the inclined portion 842 of the rotary table 840 and the inclined portion 853 of the covering member 850.

  The arrangement of the roller unit is not limited to this. For example, instead of or in addition to the upper surface of the table main body 831 of the slide table 830 and the lower surface of the table main body 841 of the rotary table 840, A roller unit may be provided between the inclined portion 833 of the slide table 830 and the inclined portion 842 of the rotary table 840.

  In order to increase the durability of the rotating mechanism 5, it is desirable to employ a roller bearing as the rolling bearing as in the above embodiment. However, the present invention is not limited to this, and a ball bearing can be adopted instead of the roller bearing.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle main body, 2 ... Seat apparatus, 3 ... Seat main body, 4 ... Slide mechanism, 5,105 ... Rotation mechanism, 6 ... Elevating mechanism, 20 ... Inner rail, 30 ... Slide table (support member), 30a ... Screw hole , 31 ... Table body, 32 ... Bent part, 33 ... Inclined part, 34 ... Extension part, 40 ... Rotary table (rotating member), 40a ... Through hole, 41 ... Table body, 42 ... Inclined part, 50 ... Sleeve, 51 ... Base end portion, 51a ... Screw, 52 ... Covering portion, 53 ... Inclined portion, 54 ... Extension portion, 60 ... Roller unit, 61 ... Roller group, 61a ... Roller, 63 ... Cage, 70, 170 ... Roller Bearings 71, 171 ... Roller group, 71a, 171a ... Rollers, 73, 173 ... Retainer, 74 ... Inclined part, 75 ... Flat part, 76 ... Receiving hole, 76a ... Inner side, 80, 180 ... Roller bearing, 81 181 ... La group, 81a, 181a ... roller, 83, 183 ... retainer, 90 ... hook, 91 ... bent portion, 92 ... extended portion, 93 ... folded portion, 130 ... slide table (support member), 130a ... through hole, 131: Table main body, 133: Inclined portion, 140: Rotary table (rotating member), 140a: Screw hole, 141: Table main body, 142: Inclined portion, 143: Extension portion, 150 ... Sleeve, 151: Tip portion, 151a ... Screws, 152 ... Covering parts, 153 ... Inclined parts, 154 ... Extension parts.

Claims (11)

A support member mounted on the vehicle main body, and a rotation member fixed to the lower surface of the seat main body and rotatably supported by the support member about an axis extending in the vertical direction. The seat main body is centered on the axis. In the rotation mechanism of the sheet that is rotated,
The support member is formed with a screw hole centered on the axis,
The rotation member has a hole centered on the axis and has a larger diameter than the screw hole.
A sleeve that is inserted into the through hole and screwed into the screw hole is formed on the outer peripheral surface, and a sleeve that covers the upper surface of the rotating member is provided,
A rolling bearing is provided between the rotating member and the support member and the sleeve,
At least one of the rotating member, the support member, and the sleeve is formed with inclined portions that are inclined with respect to the axis and parallel to each other,
The rolling bearing is provided between these inclined parts,
A sheet rotation mechanism characterized by the above. The inclined portion is formed on both the support member and the sleeve,
The rolling bearing is provided between each inclined portion,
The sheet rotation mechanism according to claim 1. The rolling bearing is provided between flat portions perpendicular to the direction in which the axis extends in at least one of the rotating member, the support member, and the sleeve,
The sheet rotation mechanism according to claim 1. The rolling bearing is provided between both the inclined portion of the rotating member and the inclined portion of at least one of the support member and the sleeve, and between the flat portion extending from these inclined portions and orthogonal to the extending direction of the axis. ,
The sheet rotation mechanism according to claim 2 or 3. A support member mounted on the vehicle main body, and a rotation member fixed to the lower surface of the seat main body and rotatably supported by the support member about an axis extending in the vertical direction. The seat main body is centered on the axis. In the rotating mechanism that is rotated,
A screw hole centered on the axis is formed in the rotating member,
The support member is a hole centered on the axis, and a through hole having a diameter larger than that of the screw hole is formed.
A sleeve that is inserted into the through hole and screwed into the screw hole is formed on the outer peripheral surface, and includes a sleeve that covers the lower surface of the support member;
A rolling bearing is provided between the support member, the rotating member, and the sleeve,
At least one of the support member, the rotation member, and the sleeve is formed with inclined portions that are inclined with respect to the axis and parallel to each other,
The rolling bearing is provided between these inclined parts,
A sheet rotation mechanism characterized by the above. The inclined portion is formed on both the rotating member and the sleeve,
The rolling bearing is provided between each inclined portion,
The sheet rotation mechanism according to claim 5. The rolling bearing is provided between flat portions orthogonal to the direction in which the axis extends in at least one of the support member, the rotating member, and the sleeve.
The sheet rotation mechanism according to claim 5. The rolling bearing is provided between the inclined portion of the support member and at least one inclined portion of the rotating member and the sleeve and between the flat portion extending from the inclined portion and orthogonal to the extending direction of the axis. ,
The sheet rotating mechanism according to claim 6 or 7. A support member mounted on the vehicle main body, and a rotation member fixed to the lower surface of the seat main body and rotatably supported by the support member about an axis extending in the vertical direction. The seat main body is centered on the axis. In the rotating mechanism that is rotated,
The support member is formed with a through hole centered on the axis,
The rotating member is formed with a sleeve portion that is inserted through the through hole, and an outer peripheral surface of the sleeve portion is formed with a screw centered on the axis.
A covering member that covers a lower surface of the support member and has a screw hole that is screwed into the screw;
A rolling bearing is provided between the support member, the rotating member, and the covering member,
The support member and at least one of the rotating member and the covering member are formed with inclined portions that are inclined with respect to the axis and parallel to each other,
The rolling bearing is provided between these inclined parts,
A sheet rotation mechanism characterized by the above. A support member mounted on the vehicle main body, and a rotation member fixed to the lower surface of the seat main body and rotatably supported by the support member about an axis extending in the vertical direction. The seat main body is centered on the axis. In the rotating mechanism that is rotated,
A through-hole centering on the axis is formed in the rotating member,
A sleeve portion inserted into the through hole is formed in the support member, and a screw centered on the axis is formed on the outer peripheral surface of the sleeve portion,
A covering member that covers the upper surface of the rotating member and has a screw hole that is screwed into the screw;
A rolling bearing is provided between the rotating member and the supporting member and the covering member,
The rotating member and at least one of the supporting member and the covering member are formed with inclined portions that are inclined with respect to the axis and parallel to each other,
The rolling bearing is provided between these inclined parts,
A sheet rotation mechanism characterized by the above. The rolling bearing is constituted by a roller bearing,
The sheet rotation mechanism according to any one of claims 1 to 10.