WO2018043344A1

WO2018043344A1 - Vehicle seat adjustment device

Info

Publication number: WO2018043344A1
Application number: PCT/JP2017/030571
Authority: WO
Inventors: 雅史星野; 佐藤　勝; 岳大西; 鈴木　一平; 晃弘宮地; 將義野元
Original assignee: 株式会社小松製作所
Priority date: 2016-08-30
Filing date: 2017-08-25
Publication date: 2018-03-08
Also published as: JP2018034583A

Abstract

Provided is a vehicle seat adjustment device that can suppress seat rattling. A shaft (130) is fixed to an upper rail (30) and extends in a direction in which the upper rail (30) moves relative to a lower rail (40). A sliding member (140) is retained by the lower rail (40). A groove that extends in the direction in which the upper rail (30) moves relative to the lower rail (40) is formed in the sliding member (140). The sliding member (140) receives the shaft (130) within the groove and supports the shaft (130). A bolt (151) and a nut (154) apply pressure to the sliding member (140) in a direction that intersects the direction in which the upper rail (30) moves relative to the lower rail (40).

Description

Vehicle seat adjustment device

The present invention relates to a vehicle seat adjustment device.

2. Description of the Related Art Conventionally, there has been proposed a seat slide device in which an upper rail equipped with a seat seat is slidably attached to a fixed lower rail (see, for example, Japanese Patent Laid-Open No. 2006-315596 (Patent Document 1)). . A roller that is slidably supported between the lower rail and the upper rail and supports the upper rail in a slidable manner winds a cylindrical leaf spring around the outer periphery of the core bar so that the upper rail can be contracted. The rattling of the upper rail is eliminated through the arrangement of a plurality of balls that slide and guide.

JP 2006-315596 A

In the above-described seat slide device, a roller is disposed at the center of the rail in the short direction, and ball bearings are disposed at one end and the other end of the rail in the short direction. Ball bearings are lubricated with oil. When foreign matters such as dust are mixed in the oil, the movement of the upper rail with respect to the lower rail may be deteriorated, or the seat may be rattled.

An object of the present invention is to provide a vehicle seat adjustment device that can suppress rattling of a seat.

A vehicle seat adjustment device according to the present invention is disposed above a vehicle floor, and includes a seat on which an occupant is seated, a first rail fixed to one of the vehicle floor and the seat, the vehicle floor and the seat. A second rail fixed to one of the two and slidable relative to the first rail, and a direction fixed relative to the first rail and the first rail moving relative to the second rail. And a sliding member, and a pressing portion. The sliding member is held by the second rail. The sliding member is formed with a groove extending in the direction in which the first rail moves relative to the second rail. The sliding member receives the shaft in the groove and supports the shaft. The pressing portion presses the sliding member in a direction that intersects the direction in which the first rail moves relative to the second rail.

According to the vehicle seat adjustment device of the present invention, it is possible to suppress the rattling of the seat.

It is a front view showing a schematic structure of a vehicular seat adjustment device based on a first embodiment. FIG. 2 is a partially enlarged front view of the vehicle seat adjustment device shown in FIG. 1. It is a disassembled perspective view of the vehicle seat adjustment apparatus. It is the disassembled perspective view seen from the different angle of the vehicle seat adjusting device. It is a front view which shows schematic structure of the vehicle seat adjustment apparatus based on 2nd embodiment. It is a front view which shows schematic structure of the vehicle seat adjustment apparatus based on 3rd embodiment. It is a front view which shows schematic structure of the vehicle seat adjustment apparatus based on 4th embodiment.

Embodiments according to the present invention will be described below with reference to the drawings. In the embodiments described below, when referring to the number, amount, and the like, the scope of the present invention is not necessarily limited to the number, amount, and the like unless otherwise specified. The same parts and corresponding parts are denoted by the same reference numerals, and redundant description may not be repeated.

In the present embodiment, the positional relationship of each part will be described with reference to an occupant seated on a vehicle seat 3. The front-rear direction refers to the front-rear direction of the occupant seated on the seat 3. The left-right direction refers to the left-right direction of the occupant seated on the seat 3. The vertical direction refers to the vertical direction of an occupant seated on the seat 3. The direction facing the occupant seated on the seat 3 is the front direction, and the direction facing the front direction is the rear direction. When the occupant seated on the seat 3 faces the front, the right side and the left side are the right direction and the left direction, respectively. The foot side of the occupant seated on the seat 3 is downward, and the upper side of the head is upward.

(First embodiment)
FIG. 1 is a front view showing a schematic configuration of a vehicle seat adjustment device 20 based on the embodiment. The direction perpendicular to the paper surface in FIG. 1 is the above-described front-rear direction. The left-right direction in FIG. 1 is the above-described left-right direction. The left side in FIG. 1 is the right direction described above, and the right side in FIG. 1 is the left direction described above. The vertical direction in FIG. 1 is the vertical direction described above.

As shown in FIG. 1, a lower frame 11 is fixed to the upper surface of the vehicle floor 1 using a plurality of bolts 12. The lower frame 11 is fixed to the vehicle floor 1 at both right and left ends. A central portion in the left-right direction of the lower frame 11 protrudes upward and is separated from the vehicle floor 1. A hollow space is formed between the central portion of the lower frame 11 in the left-right direction and the vehicle floor 1.

The upper frame 16 is disposed above the lower frame 11. The vehicle seat adjusting device 20 according to the present embodiment is disposed between the lower frame 11 and the upper frame 16. A suspension device 8 is mounted on the upper frame 16. The suspension device 8 is mounted with a seat 3 on which a vehicle occupant is seated. The seat 3 is mounted on the upper frame 16 via the suspension device 8. The seat 3 is disposed above the vehicle floor 1. The vehicle seat adjustment device 20 is interposed between the vehicle floor 1 and the seat 3.

The seat 3 has a seating portion 4 and a back surface portion 5. A vehicle occupant sits on the seat 4 of the seat 3. A back surface portion 5 is provided so that an occupant seated on the seat portion 4 can lean back. A headrest (not shown) that protects the occupant's head is attached to the upper end of the back surface portion 5.

The vehicle seat adjustment device 20 includes an upper rail 30 and a lower rail 40. The lower rail 40 is fixed to the lower frame 11 using a plurality of bolts 13. The lower rail 40 is fixed to the vehicle floor 1 via the lower frame 11. The upper rail 30 is fixed to the upper frame 16 using a plurality of bolts 17. The upper rail 30 is fixed to the seat 3 via the upper frame 16 and the suspension device 8.

The upper rail 30 and the lower rail 40 extend in the front-rear direction. The upper rail 30 is provided so as to be slidable in the front-rear direction with respect to the lower rail 40. A shaft 130 extending in the front-rear direction is fixed to the upper rail 30. The shaft 130 is provided integrally with the upper rail 30 so as to be movable relative to the lower rail 40. The shaft 130 is fixed to the upper rail 30 by welding, for example.

The vehicle seat adjustment device 20 includes a first plate 50, a second plate 60, a third plate 70, and a fourth plate 80. The first plate 50, the second plate 60, the third plate 70, and the fourth plate 80 are arranged in order from the upper side to the lower side in the vertical direction. The first plate 50, the second plate 60, the third plate 70, and the fourth plate 80 overlap each other in this order.

FIG. 2 is a partially enlarged front view of the vehicle seat adjustment device 20 shown in FIG. FIG. 3 is an exploded perspective view of the vehicle seat adjustment device 20. FIG. 4 is an exploded perspective view of the vehicle seat adjustment device 20 as seen from different angles.

As shown in FIGS. 3 and 4, the upper rail 30 is formed with a plurality of through

holes

33, 33 penetrating the upper rail 30 in the thickness direction. The bolts 17 shown in FIGS. 1 and 2 are inserted through the through holes 33 to fix the upper frame 16 and the upper rail 30. The upper rail 30 has an upper surface 31 and a lower surface 32. The upper surface 31 is in contact with the upper frame 16. The lower surface 32 faces the lower rail 40. As shown in FIG. 2, a gap is formed between the lower surface 32 and the lower rail 40.

The second plate 60 is attached to the upper rail 30 via the connecting portion 61. The second plate 60 may be formed integrally with the upper rail 30. As shown in FIG. 3, the second plate 60 has

notches

62 and 63 in which a part of the edge is notched. The second plate 60 is formed with through

holes

64 and 65 penetrating the second plate 60 in the thickness direction. The first plate 50 and the second plate 60 are fixed to each other by tightening the bolts through the through

holes

64 and 65 and the through holes formed in the first plate.

The third plate 70 is disposed between the lower rail 40 and the lower frame 11. The third plate 70 has an interposition part 71 interposed between the lower rail 40 and the lower frame 11. As shown in FIG. 1, the bolt 13 is disposed through the third plate 70, and integrally fixes the lower frame 11, the lower rail 40, and the interposition part 71 of the third plate 70.

The third plate 70 is formed with a plurality of notches 72 in which a part of the edge is notched. Each of the plurality of notches 72 is formed in the same shape. The third plate 70 is formed with through

holes

74 and 75 penetrating the third plate 70 in the thickness direction.

As shown in FIG. 2, a fixing nut portion 87 is attached to the lower surface of the fourth plate 80. The bolt 175 passes through the through

holes

74 and 75 and the through hole formed in the fourth plate 80 and is fastened to the fixing nut portion 87, thereby fixing the third plate 70 and the fourth plate 80 to each other. Has been. A washer 177 is disposed between the head of the bolt 175 and the upper surface of the third plate 70.

The lower rail 40 has an upper surface portion 41, a lower surface portion 42, a right side surface portion 43, and a left side surface portion 44. A hollow space 45 is formed inside the frame in which the upper surface portion 41, the lower surface portion 42, the right side surface portion 43, and the left side surface portion 44 are assembled. The lower rail 40 has a hollow container. The sliding member 140 is accommodated in the hollow space 45 in the container. The sliding member 140 is held by the lower rail 40.

The sliding member 140 accommodated in the container is integrally formed. The sliding member 140 is formed by a single member without being divided into two or more members inside the container.

A groove 142 extending in the front-rear direction is formed in the sliding member 140. The groove 142 penetrates the sliding member 140 in the front-rear direction. The shaft 130 fixed to the lower surface 32 of the upper rail 30 is accommodated in the groove 142. The sliding member 140 receives the shaft 130 in the groove 142 and supports the shaft 130. When the upper rail 30 moves relative to the lower rail 40, the shaft 130 slides while contacting the sliding member 140.

The opening 46 is formed in the container of the lower rail 40, and the shaft 130 is disposed in the container through the opening 46. The opening 46 opens upward. The lower rail 40 is formed with an opening 46 facing the upper rail 30. The uppermost portion of the shaft 130 protrudes upward from the opening 46.

The sliding member 140 is made of a self-lubricating resin material. The sliding member 140 is made of, for example, polyamide. The entire sliding member 140 may be formed of polyamide, or at least a portion of the sliding member 140 where the groove 142 is formed may be formed of polyamide.

The slit 141 is formed in the sliding member 140. The slit 141 extends in the vertical direction. The slit 141 communicates with the groove 142. A through hole 147 is formed in the sliding member 140. The through-hole 147 penetrates the sliding member 140 in the left-right direction.

The sliding member 140 has a step portion 143 protruding upward. A pair of step portions 143 is formed across the groove 142 in the left-right direction. As shown in FIG. 2, the stepped portion 143 is exposed upward from the opening 46 and faces the lower surface 32 of the upper rail 30. One and the other of the pair of stepped portions 143 are in contact with one and the other of the edges of the lower rail 40 that form the opening 46, respectively.

A fixing nut 153 is attached to the left side surface portion 44 of the lower rail 40. In the right side surface 43 of the lower rail 40, two through holes 47 that penetrate the right side surface 43 in the thickness direction are formed. Two through holes 48 that penetrate the left side surface 44 in the thickness direction are formed in the left side surface 44 of the lower rail 40. Bolts 151 are arranged through the through

holes

47 and 48 and further through the fixing nut 153. A nut 154 is attached to the threaded portion of the bolt 151. A head fixing plate 152 that determines the position of the head of the bolt 151 is provided on the right side surface portion 43. The bolt 151 is fixed to the lower rail 40 by tightening the nut 154.

The bolt 151 fixed to the lower rail 40 extends in the left-right direction orthogonal to the front-rear direction. The bolt 151 passes through the right side surface portion 43 and the left side surface portion 44 of the lower rail 40 and passes through the inside of the container of the lower rail 40. The bolt 151 penetrates the sliding member 140 accommodated in the container. The bolt 151 passes through a through hole 147 formed in the sliding member 140. The slit 141 extends orthogonal to the left-right direction, which is the direction in which the bolt 151 extends. The bolt 151 is disposed through the slit 141 formed in the sliding member 140.

By tightening the nut 154 to the threaded portion of the bolt 151, a leftward stress acts on the right side surface portion 43 of the lower rail 40 from the head of the bolt 151. By tightening the nut 154 to the threaded portion of the bolt 151, a rightward stress acts on the left side surface portion 44 of the lower rail 40 from the nut 154. The sliding member 140 accommodated between the right side surface portion 43 and the left side surface portion 44 of the lower rail 40 is pressed by the right side surface portion 43 and the left side surface portion 44 from both sides in the left-right direction. The bolt 151 and the nut 154 press the sliding member 140 in the left-right direction intersecting the front-rear direction. The bolt 151 and the nut 154 constitute a pressing part.

The cross-sectional shape orthogonal to the front-rear direction of the shaft 130 shown in FIGS. The shaft 130 has an upper surface 131 that faces upward and contacts the sliding member 140, and a lower surface 132 that faces downward and contacts the sliding member 140. The tangent plane of the upper surface 131 of the shaft 130 having a circular cross section extends obliquely with respect to the left-right direction and the up-down direction. A tangential plane of the lower surface 132 of the shaft 130 having a circular cross section extends obliquely with respect to the left-right direction and the up-down direction.

The sliding member 140 has an upper portion 144 disposed above the shaft 130 and a lower portion 145 disposed below the shaft 130. The upper portion 144 is in contact with the upper surface 131 of the shaft 130. Lower portion 145 contacts lower surface 132 of shaft 130.

The vehicle seat adjustment device 20 further includes a key part. As shown in FIG. 2, the key portion includes a flat upper key plate 91 and a flat lower key plate 92. The upper key plate 91 and the lower key plate 92 are arranged in parallel with an interval in the vertical direction. The upper key plate 91 and the lower key plate 92 are connected by pins 94. The pin 94 has a round bar shape.

As shown in FIG. 1, a pair of the upper rail 30, the lower rail 40, and the first to fourth plates are provided in the left-right direction. A pair of mechanisms each including the upper rail 30, the lower rail 40, and the first to fourth plates are connected by a link device 110.

The link device 110 includes a handle 111 and a link plate 112. The handle 111 has a round bar shape and has a distal end and a proximal end. The tip of the handle 111 protrudes forward with respect to the lower frame 11 and the upper frame 16. The distal end of the handle 111 protrudes forward with respect to the seating portion 4 of the seat 3. The proximal end of the handle 111 is fixed to the link plate 112. The link plate 112 has a flat plate shape.

A fixing nut portion 113 is attached to the upper surface of the link plate 112. The fixing nut portion 113 has a female screw shape. A bolt 114 is fastened to the female thread shape of the fixing nut portion 113. The bolt 114 passes through the upper frame 16. The link plate 112 is provided so as to be rotatable relative to the upper frame 16 around the bolt 114.

A rotation stopper 118 is fixed to the lower surface of the upper frame 16. The rotation stopper 118 defines a rotatable range of the link plate 112. The handle 111 shown in FIG. 1 is arranged on the leftmost side in the movable range of the handle 111. The handle 111 can be operated in the right direction (left direction in the figure) from the arrangement shown in FIG.

The link plate 112 is engaged with one end 125 of the link member 121. The other end of the link member 121 is engaged with the upper key plate 91. One end portion 126 of the link member 122 is engaged with the link plate 112. The other end of the link member 122 is engaged with the upper key plate 91.

The occupant seated on the seat 3 grips the handle 111 protruding forward from the lower side of the seat 3 and operates the handle 111 to the left and right, whereby the link plate 112 rotates around the bolt 114. When the handle 111 is operated in the right direction (left direction in FIG. 1), the upper key plate 91 connected to the link plate 112 via the link member 122 receives a force via the link member 122 and moves to the right. Move in the direction (left direction in FIG. 1).

The pin 94 connected to the upper key plate 91 is disengaged from the

notches

63 and 72 from the engaging position where the pin 94 is engaged with the notch 63 of the second plate 60 and the notch 72 of the third plate 70. Move to the disengaged position. When the pin 94 is disengaged from the

notches

63 and 72, the upper rail 30 is slidable in the front-rear direction with respect to the lower rail 40. As the upper rail 30 moves, the seat 3 moves in the front-rear direction.

When the movement of the seat 3 is completed, the passenger operates the handle 111 to the left to return the handle 111 to the arrangement shown in FIG. At this time, the pin 94 moves from a non-engagement position where the pin 94 is disengaged from the

notches

63 and 72 to an engagement position where the pin 94 is inserted into the

notches

63 and 72. Thereby, the seat 3 is positioned with respect to the vehicle floor 1 at a position selected by the occupant in the front-rear direction. In this way, the position of the seat 3 with respect to the vehicle floor 1 can be adjusted.

Next, the effect of this embodiment is demonstrated.
As shown in FIG. 2, the vehicle seat adjustment device 20 of the present embodiment includes a shaft 130, a sliding member 140, bolts 151, and nuts 154. The shaft 130 is fixed to the upper rail 30. The shaft 130 extends in the front-rear direction, which is the direction in which the upper rail 30 moves relative to the lower rail 40. The sliding member 140 is held by the lower rail 40. A groove 142 is formed in the sliding member 140 as shown in FIGS. The groove 142 extends in the front-rear direction. The sliding member 140 receives the shaft 130 in the groove 142 and supports the shaft 130. The bolt 151 and the nut 154 press the sliding member 140 in the left-right direction orthogonal to the front-rear direction.

By tightening the bolt 151 and the nut 154, a force in a direction in which the right side surface portion 43 and the left side surface portion 44 approach each other acts on the right side surface portion 43 and the left side surface portion 44 of the lower rail 40. The sliding member 140 held by the lower rail 40 receives this force and is pressed in the left-right direction. Thereby, the sliding member 140 and the shaft 130 slidingly moved in the front-rear direction with respect to the sliding member 140 can be brought into close contact with each other without a gap. The shaft 130 and the sliding member 140 are interposed between the vehicle floor 1 and the seat 3, and a gap is not formed between the shaft 130 and the sliding member 140. Suppression can be suppressed.

If a gap is formed between the shaft 130 and the sliding member 140 after a lapse of time, the sheet 3 may be rattled. In this case, by tightening the bolt 151 and the nut 154, the shaft 130 is brought into close contact with the sliding member 140 without any gap, and no gap is formed between the shaft 130 and the sliding member 140. Can get again. Therefore, rattling of the sheet 3 can be suppressed both in the initial stage and after the lapse of time.

Further, as shown in FIG. 2, the lower rail 40 has a container that can accommodate the sliding member 140 therein. By accommodating the sliding member 140 inside the container, the sliding member 140 can be reliably held by the lower rail 40.

As shown in FIG. 2, an opening 46 is formed in the lower rail 40, and the shaft 130 is accommodated in the container through the opening 46. By making the cross-sectional shape of the lower rail 40 perpendicular to the front-rear direction into a frame shape with an opening at the top, a force for reducing the opening 46 acts on the lower rail 40 when the bolt 151 and the nut 154 are tightened. Thereby, a downward force acts on the upper end portion of the sliding member 140 accommodated in the lower rail 40. Due to the action of this force, both the left-right direction and the up-down direction force are applied from the sliding member 140 to the shaft 130 accommodated in the groove 142 of the sliding member 140. Therefore, the sliding member 140 and the shaft 130 can be brought into close contact with each other in the vertical direction in addition to the horizontal direction, and the rattling of the sheet 3 can be more reliably suppressed.

As shown in FIG. 2, the sliding member 140 has a stepped portion 143 protruding upward. The step portion 143 is in contact with the edge of the opening 46. A force for reducing the opening 46 acting on the lower rail 40 when the bolt 151 and the nut 154 are tightened is directly transmitted to the step portion 143. A downward force acts on the shaft 130 from the stepped portion 143. Thereby, the sliding member 140 and the shaft 130 can be reliably adhered in both the left-right direction and the up-down direction.

As shown in FIG. 2, the sliding member 140 accommodated in the container of the lower rail 40 is integrally formed.

The sliding member 140 is made of a material having a low friction coefficient so that the shaft 130 can be easily slid in the front-rear direction. When the sliding member 140 is separated into a plurality of members, the coefficient of friction is low, so that slippage occurs on the surfaces where the adjacent members are in contact with each other, and transmission of force between the adjacent members is hindered. As a result, compared with the integrally formed sliding member 140, the strength of the sliding member 140 is reduced. In this case, it is necessary to increase the rigidity of the lower rail 40 in order to supplement the strength of the sliding member 140.

On the other hand, by integrally forming the sliding member 140, the strength of the sliding member 140 can be secured, and the rigidity of the lower rail 40 can be lowered. Therefore, the vehicle seat adjustment device 20 having a light weight and low cost structure can be realized.

Further, as shown in FIG. 2, the sliding member 140 has a lower portion 145 disposed below the shaft 130 and an upper portion 144 disposed above the shaft 130. Accordingly, an upward force can be applied to the shaft 130 from the lower portion 145 and a downward force can be applied to the shaft 130 from the upper portion 144, so that the sliding member 140 and the shaft 130 can be reliably connected in the vertical direction. Can be adhered to. By surrounding the shaft 130 with the upper portion 144 and the lower portion 145, it is possible to prevent foreign matter from entering between the sliding member 140 and the shaft 130.

Further, as shown in FIG. 2, the shaft 130 has an upper surface 131 and a lower surface 132. The upper surface 131 and the lower surface 132 extend obliquely with respect to the left-right direction. The sliding member 140 is in contact with the upper surface 131 and the lower surface 132. A part of the contact surface between the shaft 130 and the sliding member 140 is configured as a surface extending obliquely with respect to the left-right direction in which the bolt 151 and the nut 154 press the sliding member 140, thereby Direction and vertical force are applied. Thereby, the sliding member 140 and the shaft 130 can be reliably adhered in both the left-right direction and the up-down direction.

Moreover, as shown in FIG. 2, the cross-sectional shape of the shaft 130 orthogonal to the front-rear direction is circular. The circular shaft 130 can receive the force evenly. Since the circular shaft 130 surely has a surface extending obliquely with respect to the left-right direction, the sliding member 140 and the shaft 130 can be reliably adhered in both the left-right direction and the up-down direction. .

Further, as shown in FIG. 2, a slit 141 is formed in the sliding member 140. Even if a gap is formed between the shaft 130 and the sliding member 140 after the passage of time, the bolts 151 and the nuts 154 are tightened and the slit 141 is crushed so that the shaft 130 is not spaced from the sliding member 140. It can be adhered. Therefore, the play of the sheet 3 can be suppressed.

Further, as shown in FIG. 2, the slit 141 extends perpendicular to the left-right direction. By applying a force to the sliding member 140 so as to crush the slit 141, the shaft 130 can be securely adhered to the sliding member 140 without a gap in the left-right direction.

Further, as shown in FIG. 2, the bolt 151 is disposed through the slit 141. In this way, by tightening the bolt 151 and the nut 154, a force that directly crushes the slit 141 can be applied to the sliding member 140, so that the shaft 130 is applied to the sliding member 140. Can be reliably adhered without gaps.

Further, at least a portion of the sliding member 140 where the groove 142 is formed is made of polyamide. By forming the groove 142 that slides with respect to the shaft 130 out of the sliding member 140 from polyamide having a low friction coefficient, the shaft 130 can be smoothly slid relative to the sliding member 140. Since the outer peripheral surface of the shaft 130 is wiped off by the sliding member 140, foreign matter such as dust can be prevented from adhering to the outer peripheral surface of the shaft 130. By forming the sliding member 140 from a self-lubricating material, it is not necessary to supply lubricating oil, and the frequency of maintenance of the vehicle seat adjustment device 20 can be reduced.

The entire sliding member 140 may be made of polyamide. Further, the sliding member 140 may be formed of another self-lubricating material such as a fluororesin.

(Second embodiment)
FIG. 5 is a front view showing a schematic configuration of the vehicle seat adjusting apparatus 20 according to the second embodiment. As shown in FIG. 5, in the vehicle seat adjustment device 20 according to the second embodiment, the slit 141 formed in the sliding member 140 extends in the left-right direction. The slit 141 extends in parallel to the direction in which the bolt 151 and the nut 154 press the sliding member 140. The slit 141 communicates with a groove 142 that accommodates the shaft 130.

By applying a force to the sliding member 140 so that the slit 141 extending in the left-right direction is crushed, the shaft 130 can be securely adhered to the sliding member 140 without a gap in the vertical direction.

(Third embodiment)
FIG. 6 is a front view showing a schematic configuration of the vehicle seat adjusting apparatus 20 according to the third embodiment. The cross-sectional shape of the shaft 130 orthogonal to the front-rear direction is not limited to a circle. As shown in FIG. 6, the cross-sectional shape of the shaft 130 orthogonal to the front-rear direction may be a triangle.

In this case, the hypotenuse of the triangle constitutes the upper surface 131 of the shaft 130. The upper surface 131 constituted by the oblique sides of the triangle extends obliquely with respect to the left-right direction and the up-down direction. The sliding member 140 has an upper portion 144 that is disposed above the shaft 130 and a lower portion 145 that is disposed below the shaft 130. The upper portion 144 is in contact with the upper surface 131 of the shaft 130.

A force from the sliding member 140 to the shaft 130 acts through the upper surface 131 constituted by the oblique sides of the triangle. Thereby, the sliding member 140 and the shaft 130 can be reliably adhered in both the left-right direction and the up-down direction.

The cross-sectional shape of the shaft 130 orthogonal to the front-rear direction may be another polygonal shape such as a rhombus.

(Fourth embodiment)
FIG. 7 is a front view showing a schematic configuration of the vehicle seat adjusting apparatus 20 according to the fourth embodiment. In the fourth embodiment, the shaft 130 is fixed to the third plate 70. The lower rail 40 is fixed to the upper rail 30 by turning upside down with respect to the arrangement shown in FIG. The shaft 130 is fixed to the vehicle floor 1 via the third plate 70 and the lower frame 11. The lower rail 40 is fixed to the seat 3 via the upper rail 30 and the upper frame 16. In the fourth embodiment, the third plate 70 corresponds to a first rail to which the shaft 130 is fixed, and the upper rail 30 and the lower rail 40 correspond to a second rail that is slidable relative to the first rail. .

Also in the vehicle seat adjustment device 20 configured in this way, as in the first embodiment, the gap is not formed between the shaft 130 and the sliding member 140, so that the seat 3 is not rattled. Can be suppressed.

In the embodiments described so far, the configuration in which the shaft 130 is brought into close contact with the sliding member 140 without gaps by tightening the nut 154 to the bolt 151 extending in the left-right direction has been described. Instead of this configuration, the shaft 130 may be in close contact with the sliding member 140 without a gap by tightening a nut to a bolt extending in the vertical direction.

The groove 142 formed in the sliding member 140 penetrates the sliding member 140 in the front-rear direction, but the groove 142 does not necessarily have to penetrate the sliding member 140. The sliding member 140 may have a portion that closes both ends of the groove 142 that extends in the front-rear direction, and the groove 142 may not be formed at both ends of the sliding member 140 in the front-rear direction.

As described above, the embodiments of the present invention have been described. However, the configurations of the embodiments may be appropriately combined. In addition, it should be considered that the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 vehicle floor, 3 seats, 11 lower frame, 12, 13, 17, 114, 151, 175 bolt, 16 upper frame, 20 vehicle seat adjustment device, 30 upper rail, 31 upper surface, 32 lower surface, 33, 47, 48, 64, 65, 74, 75, 147 through-hole, 40 lower rail, 41 upper surface, 42 lower surface, 43 right side, 44 left side, 45 hollow space, 46 opening, 50 first plate, 60 second plate, 62, 63, 72 Notch, 70 Third plate, 80 Fourth plate, 91 Upper key plate, 92 Lower key plate, 94 Pin, 110 Link device, 111 Handle, 112 Link plate, 118 Anti-rotation part, 121, 122 link member, 130 shaft, 1 1 upper surface 132 bottom surface, 140 sliding member, 141 slit, 142 groove, 143 stepped portion, 144 upper portion, 145 lower portion, 152 head fixing plate, 153 fixed nut 154 nut.

Claims

A seat disposed above the vehicle floor and seated by an occupant;
A first rail fixed to one of the vehicle floor and the seat;
A second rail fixed to one of the vehicle floor and the seat and slidable relative to the first rail;
A shaft fixed to the first rail and extending in a direction in which the first rail moves relative to the second rail;
A groove that is held by the second rail and extends in a direction in which the first rail moves relative to the second rail is formed, and a slide that receives the shaft and supports the shaft in the groove. A moving member;
A vehicle seat adjustment device comprising: a pressing portion that presses the sliding member in a direction intersecting with a direction in which the first rail moves relative to the second rail.
2. The vehicle seat adjustment device according to claim 1, wherein the second rail includes a container capable of accommodating the sliding member therein.
The vehicle seat adjustment device according to claim 2, wherein an opening is formed in the second rail, and the shaft is disposed in the container through the opening.
The vehicle seat adjustment device according to claim 2 or 3, wherein the sliding member accommodated in the container is integrally formed.
The vehicle seat adjustment device according to any one of claims 1 to 3, wherein the sliding member has a portion disposed below the shaft and a portion disposed above the shaft. .
4. The shaft according to claim 1, wherein the shaft has a partial surface extending obliquely with respect to a direction in which the pressing portion presses the sliding member, and the sliding member contacts the partial surface. The vehicle seat adjustment device according to claim 1.
The vehicle seat adjustment device according to claim 5, wherein a cross-sectional shape of the shaft perpendicular to a direction in which the first rail moves relative to the second rail is circular.
4. The vehicle seat adjustment device according to claim 1, wherein a slit is formed in the sliding member.
The vehicle seat adjustment device according to claim 8, wherein the slit extends orthogonally to a direction in which the pressing portion presses the sliding member.
The vehicle seat adjustment device according to claim 8, wherein the pressing portion is disposed through the slit.
The vehicle seat adjustment device according to claim 8, wherein the slit extends in parallel with a direction in which the pressing portion presses the sliding member.
The vehicle seat adjustment device according to any one of claims 1 to 3, wherein at least a portion of the sliding member that forms the groove is made of polyamide.