JPH0655572B2 - Rotating mechanism of rotating seat - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rotating mechanism in a rotating seat provided in a vehicle such as a bus.

(Prior art and its problems) Conventionally, in a rotating mechanism in this type of seat, a slide frame is supported on a vehicle floor side lower frame slidably in a lateral direction by a slide rail, and a turntable is rotatably supported on the slide frame. The upper frame integrated with the seat is connected to the upper part of the rotary disk, and a kicker including a roll is provided on the lower part of the rotary disk, and the kicker is a guide including a cam and a roller provided on the lower frame side. By moving along the member, the seat portion is slid laterally to change the direction (for example, Japanese Patent Publication No. 61-20).
451 and JP-A-56-131433).

The conventional rotation mechanism has a problem that the initial rotation operation force is large and it is difficult to change the direction in the state where the direction of the seat is changed from the stationary fixed position. That is, for example, the one disclosed in Japanese Examined Patent Publication No. 61-20451 discloses a kicker consisting of rolling cams each having a head of π shape and arranged at equal intervals of 90 degrees, and two kickers arranged opposite to a lower frame. And a guide member composed of a roller. Therefore, in order to increase the lateral movement amount of the seat portion when the seat portion is rotated, the guide member consisting of the roller is fitted into the head of the rolling cam that constitutes the kicker, and the rolling cam must pass over the roller. Since it must be done, the initial rotational operation force is large.

Further, in the one disclosed in Japanese Patent Laid-Open No. 56-131433, a roller is used as the kicker and a cam is used as a guide member with which the roller rolls. This cam is formed in a mountain shape, and there is a problem that the seat portion cannot rotate unless an initial rotational operation force is applied to the seat portion such that the roller rides over the mountain shaped surface.

(Purpose) Therefore, an object of the present invention is to provide a rotating mechanism of a rotating seat that can rotate a seat portion at a steady fixed position with a small external force.

(Structure) The gist of the present invention for achieving the above object is that the kicker is composed of four rollers arranged at equal intervals of 90 degrees in the same plane, while the guide member is The slide frame is urged in the passage direction by being disposed between a slide frame and the lower frame, which is provided on one side wall of the lower frame on the passage side and has a top portion projecting toward the window side and having a substantially isosceles triangular shape. One of the rollers, which is constituted by a spring and constitutes the kicker, is a rotating mechanism of a rotary seat in which the seat portion is in rolling contact with the top portion of the cam at a steady fixed position.

Therefore, one of the rollers is rollingly contacted with the top of the cam having a substantially isosceles triangular shape when the seat portion is in the stationary fixed position. Therefore, after unlocking the lock, a slight rotational external force is applied to the seat portion.
The roller is slid down from the top of the cam by the urging force of the spring, and the sliding down of the roller causes the seat to move in the direction of the passage and rotate.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the rollers (10) (11) (12) which are the gist of the present invention.
FIG. 3 shows the relationship between the kicker composed of (13) and the cam (20) as a guide member, that is, when the seat (a) is facing forward, that is, in the steady fixed position, in such a case, the roller (10 ) Is rolling on the top (21) of the cam (20). In this state, the seat portion (a) is fixed to the lower frame (1) on the vehicle floor side by the lock mechanism. Further, in this state, the movable rails (5a) of the slide rails (5), (5) interposed between the slide frame (2) and the lower frame (1).
Is arranged in a state of being maximally extended or contracted with respect to the fixed rail (5b), and the top (21) of the cam (20) of the roller (10) is
Holds the state of being transferred to.

Figure 2 shows the roller (10) when the seat (a) is rotated 45 degrees.
(13) ... and the relationship between the cam (20). The roller (10) is one side from the top (21) of the cam (20)
The other roller (13) slides along (22) and the cam (20)
The other side (22 ') is in contact with the other side. Therefore, (1
0) (13) moves to the passage (c) side with respect to the top (21) of the cam (20), the seat (a) moves to the passage (d) side from the state shown in FIG. Rotate.

The cam (20) on which one or two rollers (10), (11), (12) and (13) are in rolling contact may be formed in an isosceles triangle, but as shown in the figure, the cam (20) is formed on the top (21). On the other hand, if the two sides (22) and (22 ') on the left and right sides are formed in a curve with a steep slope on the top (21) side and a gentle slope on the base side,
(21) The initial movement amount of the roller (10) in the rolling contact state (steady fixed position (forward or backward) of the seat (a) (cam of the roller (10)).
(Amount of movement of (20) toward the base portion) can be made large, so that when the seat portion (a) is rotated from the steady fixed position, for example, in the direction of 45 degrees, when the seat portion (a) is rotated, the seat portion (a) is rotated. During the initial rotation of (a), the amount of movement of the seat portion (a) in the direction of the passage (b) side (lateral direction) becomes large, and the seat portion (a) or its armrest moves toward the window (d) side during the rotation. There is no contact.

In addition, by making the top portion (21) of the cam (20) sharp and making the outer diameters of the rollers (10) ...
Since the lateral movement amount of the seat portion (a) is large with respect to the rotation angle of (a), the gap between the seat portion (a) and the window (d) side can be reduced.

Also, since the base sides of the two sides (22) and (22 ') of the cam (20) are formed to have a gentle inclination, the seat (a) can be changed from the state shown in FIG.
To restore the original state, or 45 degree seat (a)
When rotating, the initial rotation can be performed by applying a slight external force.

4 and 5 show the roller (10) ..., the cam (20).
2 is a view showing a rotating device for a rotating seat equipped with.

The rollers (10), (11), (12) and (13) are annular rotating plates (1
4) Protrusions protruding outward from the outer periphery at equal intervals of 90 degrees
(14a) (14a) ... Mounted on the same plane at the tip,
The rotating plate (14) is fixed to the lower surface of the rotating plate (3) by connectors (31) (31) ....

The turntable (3) is integrally connected to the upper frame (4) integral with the seat (a), and is rotatably supported with respect to the slide frame (2). That is, the turntable (3) is rotatably supported by the lower ring (6) fixed to the slide frame (2), and the lower ring (6) is connected to the upper frame (4) through the upper ring (61). ) Is rotatably abutted.

The slide frame (2) and the lower frame (1) fixed to the vehicle floor are connected by slide rails (5) and (5), and the slide frame (2) is mounted slidably in the passage (c) direction. The slide frame (2) is a spring (not shown) stretched between the slide frame (1) and the lower frame (1).
Is urged in the direction of the passage.

The above-described sliding structure of the slide frame (2) and the lock mechanism for stopping the rotation of the rotary disk (3) are interconnected with each other, and the description thereof is omitted. In addition, in the figure (71)
Reference numerals (72), (73), (74), (75), (76), and (77) denote parts and structures that constitute the lock mechanism.

Thus, when the seat (a) is in the steady fixed position, this seat
Upper frame (4) bracket (77) integral with (a)
When the lever (71) provided on the is operated, the locked state is released. That is, the stopper pin (72) is the upper frame.
The seat (a) is rotatable and escapes from the through hole (4), the through hole (74) of the lower ring (6), and the locking hole (75) of the turntable (3), and the lever (71). Cable connected to (7
Lock pin (7) provided on the lower frame (1) through (6)
3) is disengaged so that the slide frame (2), that is, the seat portion (a) can slide laterally with respect to the lower frame (1). Therefore, when a slight external force is applied to the seat portion (a) or the backrest portion (b) that is integral with the seat portion (a), the spring causes the slide frame (2) to be urged in the passage direction. By the elasticity of the rollers (10), (11), (12) and (13), the rollers (10), (11), (12) and (13) roll from the state of FIG. 1 to the state of FIG. Rotate once. That is, the roller (10) rollingly contacting the top of the cam (20) rolls in the direction in which an external force is applied and moves along one side (22) of the cam (20), and the roller (13) is moved by the cam. (20) Abut on the base side of the other side.

From the top (21) of the cam (20) of the roller (10) to the base
By moving in the (22) direction, the seat portion (a) moves laterally as described above, and the seat portion (a) rotates without contacting the window (d). In this state, the stopper pin (72) of the lock mechanism that restricts the rotation and lateral movement of the seat portion (a),
The lock pin 73 is actuated by the elasticity of a spring (not shown) to be locked.

Further, when the seat portion (a) is rotated, the above operation can be repeated.

(Effect) According to the present invention, when the seat portion of the rotary seat is in the steady fixed position, one of the four rollers constituting the kicker is
It is in a state of rolling contact with the top of the cam having a substantially isosceles triangular shape on the lower frame side.Since the slide frame is biased by the elastic force of the spring in the passage direction, a slight rotational operation force is applied to the seat portion. Simply add it and the seat will automatically move to the aisle and rotate. That is, since the initial rotational operation force can be reduced as compared with the conventional product, the rotational operation of the seat becomes easy. Further, since the lower frame may be provided with a cam having a substantially isosceles triangular shape, the structure is simple and the weight can be reduced as compared with the conventional product using the cam. In addition, by forming the top part of the two sides of the cam in a steep slope and forming the base part in a gentle slope, the lateral displacement of the seat can be reduced when rotating from the stationary position. If the seat is large, the seat or armrest does not come into contact with the window side during the initial rotation of the seat, and if the cam rotates on the two sides after rotating a fixed angle (for example, 45 degrees) from the steady fixed position, the cam is loose on two sides. Since it is rollingly contacted with the inclined portion, the seat portion rotates with a slight rotational operation force.

[Brief description of drawings]

The drawings show an embodiment of the present invention, FIG. 1 is a plan view showing the relationship between the kicker and the guide member when the seat portion is in a stationary fixed state, and FIG. 2 is a state in which the seat portion is rotated 45 degrees. 3 is a plan view showing the positional relationship of the guide members, and FIG.
FIG. 5 is an exploded perspective view of a rotating device for a rotary seat equipped with a kicker and a guide member according to the present invention, and FIG. 5 is a sectional view of the same. In the figure, (10), (11), (12) and (13) are rollers that are kickers, (20) is a cam that is a guide member, (1) is a lower frame, (2) is a slide frame, and (3) is a rotation. Boards (4) show upper frames, respectively.

Claims (1)

[Claims] 1. A lower frame supports a slide frame slidably in a lateral direction, a rotary plate is rotatably attached to the slide frame, an upper frame integrated with a seat portion is connected, and a lower part of the rotary plate is attached. In a rotary seat in which a kicker is provided, and the kicker is moved along a guide member provided on the lower frame side to change the direction of the seat portion, the kickers are arranged in the same plane at equal intervals of 90 degrees. The guide member is composed of four rollers, and the guide member is provided on one side wall of the passage of the lower frame, the cam having a substantially isosceles triangular shape having a top portion projecting toward the window side, and between the slide frame and the lower frame. And a spring for urging the slide frame in the passage direction, and one of the rollers forming the kicker is the cam when the seat portion is in a steady fixed position. Rotation mechanism of the rotation seat formed by rolling contact with the top.