JPH078633B2 - Rotating seat for vehicle - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vehicle rotary seat in which a seating portion is rotatably attached to a vehicle frame.

[Prior Art] In recent years, there are some wagon vehicles and the like, for example, in which a passenger seat is rotatably provided so that the passenger seat can face rearward while the vehicle is stopped.

A vehicle rotary seat used for such a wagon vehicle or the like includes a seat portion and a backrest portion, and the seat portion is rotatably provided on a vehicle frame via a rotation base. Then, by rotating the seating portion with respect to the rotation base, the entire seat is directed forward or backward.

By the way, if an attempt is made to install such a rotating seat on a vehicle having a narrow vehicle width, there may occur a problem that the front end of the seat interferes with the inside of the vehicle body when the seat is rotated.

Japanese Patent Laid-Open No. 63-
The one described in Japanese Patent No. 242746 has been proposed. As shown in FIG. 6, the rotary seat disclosed in this publication has a seat A.
Is composed of a main body portion C on the rear side (backrest portion B side) and a movable portion D on the front side, and the movable portion D is rotatably provided on the main body portion C via a support shaft E. Center of rotation O
In the case of rotating around the center, the movable portion D is rotated as shown by an imaginary line, and the distance from the rotation center O to the front end of the sheet is shortened. As a result, the front end of the seat is prevented from interfering with the side portion of the vehicle body.

[Problems to be Solved by the Invention] However, the conventional rotary sheet has problems in terms of manufacturing and life.

That is, the main body portion C and the movable portion D are composed of the frame portion c ₁ ,
It is composed of d ₁ and cushions c ₂ and d ₂ placed on them. When connecting the main body part C and the movable part D, connect the frames c ₁ , d ₁ to each other. become.
Therefore, the support shaft E connecting the two is located below the main body C. Therefore, as shown in FIG phantom seat A front side and rear side of the cushion d ₂ of the cushion c ₂
When formed to the upper surface of the orthogonal, when rotating the movable unit D, a front side upper portion of the cushion c _2, cushion d ₂
This interferes with the lower portion of the rear side surface, making it impossible to rotate the movable portion D.

Therefore, in the above-described rotary seat, the front side surface of the cushion c ₂ and the rear side surface of the cushion d ₂ are each formed by an arcuate surface centered on the support shaft E, thereby avoiding interference between the two.

However, it is very difficult to manufacture not only the side surfaces of the cushions c ₂ and d ₂ to be arcuate surfaces but also to have the same radius of curvature of both, which causes a problem that the manufacturing cost rises. .

Further, if the side surfaces of the cushions c ₂ and d ₂ are arcuate surfaces, the lower front end of the cushion c ₁ and the upper rear end of the cushion d ₂ are acutely angled, and the strength of those parts is reduced. In particular, the rear end upper portion of the cushion d _2, since the occupant load is applied directly, there is a problem that early reaching life.

The present invention has been made to solve the above problems, and of course, the seat can be rotated without the front end of the seating portion interfering with the inner portion of the vehicle body, and the manufacturing cost can be reduced. It is an object of the present invention to provide a vehicle rotary seat that is capable of achieving a long life.

[Means for Solving the Problems] In order to achieve the above object, the present invention has a seating portion and a backrest portion, and the seating portion is rotatable around a rotation axis line in which the seat portion faces the up-down direction. In the vehicle rotary seat provided in, the seating portion is composed of a rear main body portion rotatably provided in the vehicle frame and a front movable portion, and one end portion of a link is rotated to a lower portion of the main body portion. The link is movably provided, and the movable part is rotatably provided at the other end of the link.

In this case, it is desirable to provide a locking mechanism between the main body section and the movable section to prevent the movable section from rotating.

[Operation] When the seat is rotated, first, the movable portion of the seating portion is rotated with respect to the link so that the rear end portion is displaced upward. Next, in that state, the link is rotated so that the movable portion is displaced upward. Then, the entire sheet is rotated.

When the rotation of the movable portion is blocked by the locking mechanism, the link and the movable portion are fixed to the main body portion.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying FIGS. 1 to 5.

1 and 2 show a schematic structure of a rotary seat according to the present invention. FIG. 1 is a side view thereof, and FIG. 2 is a plan view thereof. The vehicle rotary seat 1 shown in these figures includes a seat 2 and a backrest 3.
The seating portion 2 is rotatably supported by a rotation base (not shown) provided on the vehicle frame about a rotation axis O that faces in the vertical direction. On the other hand, the back part 3
Is rotatably connected to the rear end of the seat 1 in the directions of arrows C ₁ and C ₂ .

The seating portion 2 is composed of a rear side (backrest 3 side) main body portion 4 rotatably supported by a rotation base, and a front movable portion 5, and the movable portion 5 is linked to the main body portion 4. It is rotatably connected via 70. Ie link 70
Indicates that one end of the shaft 45a is centered around the shaft portion 45a and the arrow B
_It is rotatably connected in the ₁ and B ₂ directions, and the movable portion 5 is attached to the other end through a support shaft 73 and a bracket 74.
It is rotatably connected in the A ₁ and A ₂ directions.

It should be noted that when the movable portion 5 is in the state shown by the solid line in FIG. 1, that is, the movable portion 5 is located on the front side extension of the main body portion 4, and the seating portion 2 is in a normal state in which it can be seated. In some cases, the movable part 5 is fixed in the illustrated state by a locking mechanism described later.

In the rotating seat 1 having the above-described structure, in order to change the direction from the front to the rear, for example, when rotating about the rotation axis O, the locking mechanism is first released. Next, the movable part 5 is rotated about the support shaft 73 with respect to the link 70 in the direction of arrow A ₁ by about 90 °. After that, the movable portion 5 and the link 70 are rotated about 90 ° about the shaft portion 45a while maintaining their relative positional relationship.

When the movable part 5 is rotated as described above, the distance from the front end edge of the movable part 5 to the rotation axis O after the rotation becomes L ₂ . This distance L ₂ is smaller than the distance L ₁ from the front edge of the movable portion 5 to the rotation axis O before the rotation. In other words, after rotating the movable part 5 as described above,
The distance from the rotation axis O to the front edge of the movable part 5 is (L ₁
It can be shortened by -L ₂ ). Therefore, if the seating portion 1 is rotated without rotating the movable portion 5, the front end portion of the seating portion 2 (movable portion 5) is located on the vehicle body (not shown).
(L ₁ −L ₂ ) even if it interferes with the inner part of
Is set to be larger than the interference amount, the seating portion 2 can be rotated without interfering with the inner portion of the vehicle body.

Further, as is apparent from the above-described rotation procedure, in rotating the rotating sheet 1, it suffices to rotationally displace the movable part 5 without rotating the rotating sheet 1 together with the rotating base. . Therefore, the rotating operation of the rotating sheet 1 can be performed extremely easily and easily.

Further, when the movable portion 5 is rotated about the shaft portion 45a in the state shown by the solid line, that is, when the movable portion 5 is rotated in the same manner as the conventional one described above, the rear end portion of the movable portion 5, In particular, the a circle part interferes with the b circle part of the main body part 4 and cannot rotate. In this respect, in the rotating sheet, the movable part 5
Is rotatably connected to the link 70, so that the movable portion 5 interferes with the main body portion 4 by rotating the movable portion 5 in the direction of arrow A ₁ before rotating the link 70. Can be prevented. Moreover, since the center of rotation (support shaft 73) between the movable portion 5 and the link 70 is located below the movable portion 5, the movable portion 5 is rotated when the movable portion 5 is rotated in the arrow A ₁ direction.
There is no interference with the main body 4. Therefore, the front end side surface of the main body portion 4 and the rear end side surface of the movable portion 5 can be flat surfaces orthogonal to the upper surface of the seating portion 2 without being arcuate surfaces. Therefore, the main body portion 4 and the movable portion 5 can be manufactured at low cost, and thus the manufacturing cost of the entire seat 1 can be reduced. Moreover, since a sharp angle portion is not formed on the rear end side of the movable portion 5, the strength thereof can be increased and thus the life can be improved.

Next, a specific structure of the rotating seat 1, particularly a specific structure of the seat 2 will be described with reference to FIGS. 3 to 5.

In FIG. 3, reference numeral 40 is a cushion frame of the main body 4. The cushion frame 40 has a substantially rectangular frame shape, and a cushion pad is provided on the upper surface of the cushion frame 40.
41 is placed and fixed. Of course, the cushion pad 41 is covered with a skin (not shown). Note that reference numeral 42
Is a support spring that elastically supports the cushion pad 41.

Also, on the inner surface of the cushion frame 40, the rotation axis O
Three brackets 43a, 43b, 43c protruding toward are fixed. The cushion frame 40 is rotatably supported by a rotation base (not shown) via the brackets 43a, 43b, 43c. The support structure for the rotation base and the cushion frame 40 is the same as a well-known support structure, and therefore its description is omitted.

Reference numeral 44 is a lock lever. Lock lever 44
Has its inner tip portion engaged with a lock hole formed in the rotation base by a spring (not shown), which prevents the rotation of the rotary seat 1 and the front end of the lock lever 44. When the portion is pushed down in the direction of arrow D, the engagement with the lock hole is released, and the seat 1 is allowed to rotate. Of course, the lock holes are formed on the front side and the rear side with the rotation axis O interposed therebetween so that the rotary seat 1 can be positionally fixed forward and backward.

Further, a pair of locking fittings 45, 45 and a pair of brackets 46, 46 are fixed to the outer surface on the front side of the cushion frame 40, respectively. A cushioning member 47 made of rubber or the like is attached to each locking fitting 45, and a similar cushioning member is attached to each bracket 46.
48 is installed.

A support mechanism 7 that rotatably supports the movable portion 5 is provided at the front end of the cushion frame 40.
The support mechanism 7 is configured as follows.

That is, each of the locking fittings 45 is provided with a shaft portion 45a protruding in the left-right direction of the seat 1. Each shaft 45a has
Rear ends of the links 70, 70 are rotatably supported. Cylindrical members 71, 71 are fixed to the front end portions of the side surfaces of the links 70, 70 facing each other, with their axes aligned. One end portion and the other end portion of a horizontally arranged engaging plate 72 are fixed to each tubular member 71. When the lower surface of the engagement plate 72 abuts on the cushioning member 48, 48, more link 70 is not obtained and rotated in the arrow B ₂ direction.

A support shaft 73 is inserted through the cylindrical members 71, 71 so as to rotatably pass through them and also rotatably penetrate the links 70, 70. The lower ends of the brackets 74, 74 are fixed to the one end and the other end of the support shaft 73 protruding from the links 70, 70, respectively. On the upper end of each bracket 74, one end and the other end of a support plate 75 having an L-shaped cross section are placed, and a pan 76 is placed on the support plate 75. These support plates 75 and 76 penetrate the bracket 74, the support plate 75, and the pan 76, and are nuts fixed to the pan 76.
Bracket 74 with bolts (not shown) that thread into 77
It is fixed to. A cushion pad 78 is placed and fixed on the pan 76. The cushion pad 78 is covered with an epidermis (not shown).

As is clear from the above description, the movable portion 5 is constituted by the support plate 75, the pan 76, the cushion pad 78 and the skin thereof.

Further, the support plate 75 is designed to be prevented from rotating in the following manner.

That is, in the state shown by the solid line in FIG. 1, that is, in the state shown in FIG. 5, the support plate 75 has its upper and lower surfaces abutted against the cushioning member 47 attached to the locking fitting 45, When it hits the cushioning member 47, the support plate
75 can no longer rotate in the direction of arrow A ₂ .

Brackets 79 and 79 are fixed to the lower surface of the support plate 75 near the locking fittings 45 and 45, respectively. An engaging piece 80 is rotatably provided on each bracket 79 via a shaft 81. At the lower end of the engaging piece 80, the locking claw 80a
The engaging claw 80a is engaged with the lower end of the engaging metal fitting 45 to prevent the support plate 75 from rotating about the support shaft 73 in the direction of the arrow A ₁ and eventually move. Part 5
The rotation of the link 70 in the direction of the arrow A ₁ is blocked. As a result, rotation of the link 70 around the shaft portion 45a in the arrow B ₁ direction is also prevented.

The engagement piece 80 is biased in the direction of arrow E ₁ by a spring (not shown) so that the engagement between the engagement claw 80a and the engagement fitting 45 does not come off unintentionally. On the other hand, the engaging piece
In order to release the engagement between the 80 and the locking fitting 45, one ends of the links 82, 82 are fixed to both ends of the support shaft 73, respectively. One end of the wire 83 is connected to the other end of the link 82, and the other end of the wire 83 is connected to the engaging piece 80. Then, when the link 82 is rotated in the arrow A ₁ direction, the engagement piece 80 is rotated in the arrow E ₂ direction against the biasing force of the spring, whereby the engagement piece 80 and the locking metal fitting 45 are connected. Is disengaged. As a result, the support plate 75 becomes rotatable in the arrow A ₁ direction.

A lever 84 is fixed to a portion of the support shaft 73 located between the two tubular members 71, 71 in order to rotate the link 82 in the direction of arrow A ₁ . Then, when one end of the lever 84 covered with the covering member 85 is pushed in the direction of arrow G, the link 82 is rotated in the direction of arrow A ₁ via the support shaft 73, and the engaging claw 80 then extends in the direction of arrow E _2. It is turned in the direction. As a result, the engagement between the engagement piece 80 and the locking fitting 45 is released.

On the other hand, when engaging the engagement piece 80 and the locking fitting 45, the support plate 75 is rotated in the direction of arrow A ₂ . Then, the inclined surface 80b formed at the lower end of the engagement piece 80 abuts on the locking fitting 45. When the support plate 75 is further rotated in the same direction in this state, the engaging piece 80 is rotated in the arrow E ₂ direction by the action of the inclined surface 80b. After that, when the support plate 75 is further rotated in the same direction, the engaging claw 80a rides over the locking metal fitting 45 and comes into contact with the lower end surface of the engaging metal fitting 45, so that the engaging claw 80a engages with the locking metal fitting 45. . At this time, the engaging claw 80a is locked by the locking metal fitting 4
Immediately before getting over 5, the support plate 75 hits the cushioning member 47. Therefore, after the support plate 75 hits the cushioning member 47, the support plate 75 is rotated while elastically deforming the cushioning member 47. As is clear from this content, when the engagement piece 80 is engaged with the locking fitting 45, the support plate 75
As a result, the movable portion 5 is fixed to the elastic force of the buffer member 47.
Therefore, the movable portion 5 does not rotate excessively.

1 and 3, reference numeral 86 indicates the movable part 5.
Is a spring for holding the seat in either a seatable state or a rotationally displaced state.

When rotating the rotating seat 1 having the above-described structure, first, the lever 84 is pushed in the direction of the arrow G to disengage the engagement piece 80 from the engagement fitting 45. Next, as described above, the movable part 5 is rotated by approximately 90 ° in the arrow A ₁ direction, and then the movable part 5 and the link 70 are rotated by approximately 90 ° in the arrow B ₁ direction. Next, the lever 44 is pushed down in the direction of arrow D, and the engagement between the lever 44 and the rotation base is released. Then, the rotating sheet 1 is rotated.

Further, after the rotation seat 1 is rotated, in order to bring the seating portion 2 into a normal state in which the seating portion 2 can be seated, the movable portion 5 is rotated together with the link 70 in the arrow B ₂ direction until the engaging plate 72 abuts on the buffer member 48. Next, the movable part 5 is rotated in the direction of the arrow A ₂ to move the support plate.
75 is abutted on the cushioning member 47, and the engagement piece 80 is engaged with the locking fitting 45. As a result, the seating portion 2 returns to a seatable state.

[Effects of the Invention] As described above, according to the vehicle rotary seat of the present invention, the seating portion includes the main body portion and the movable portion, and the movable portion is rotatably provided to the main body portion via the link. In addition, since the movable part is rotatably provided with respect to the link, the seat can be rotated without the front end of the seating part interfering with the inner part of the vehicle body, and the manufacturing cost can be reduced. It is possible to obtain the effect that the life can be improved and the like.

Further, it is not necessary to block the rotation of the link and the movable portion, and the link and the movable portion can be fixed to the main body portion only by blocking the rotation of the movable portion by the locking mechanism. That is, the link and the movable part can be fixed by one locking mechanism, and the manufacturing cost can be reduced.

[Brief description of drawings]

FIGS. 1 to 5 attached herewith show an embodiment of the present invention. FIG. 1 is a side view showing a schematic structure thereof, FIG. 2 is a plan view thereof, and FIG. 3 is an exploded perspective view of a seat portion. FIG. 4 is an exploded perspective view showing a support mechanism, FIG. 5 is a sectional view showing a locking mechanism of a movable part, and FIG. 6 is a side view showing an example of a conventional vehicle rotary seat. O ... Rotation axis, 1 ... Rotating seat, 2 ... Seat, 3
…… Backrest part, 4 …… Main body part, 5 …… Movable part, 70 ……
Link.

Claims (2)

[Claims] 1. A vehicle rotary seat, comprising a seat portion and a backrest portion, wherein the seat portion is rotatably provided on a frame of a vehicle about an axis of rotation which is oriented in the up-down direction. It is composed of a rear main body and a front movable part that are rotatably mounted on the main body.One end of the link is rotatably provided at the lower part of the main body, and the movable part is rotated to the other end of the link. A rotating seat for a vehicle, which is movably provided. 2. The vehicle according to claim 1, further comprising a locking mechanism provided between the main body portion and the movable portion to prevent the movable portion from rotating. Rotating sheet.