JPS6056647B2 - swivel seat - Google Patents

Description

[Detailed description of the invention] FIELD OF THE INVENTION The present invention relates to swivel seats for vehicles.

Examples of conventional rotary seats are shown in FIGS. 1 to 3.

To explain based on the figure, 1 is a cylindrical seat support fixed to the floor F, 2 is an inner cylinder that is fitted into the seat support layer and can be moved up and down, and 3 is the bottom 2 of the inner cylinder 2. 4 is a key groove formed vertically on the outer surface of the inner cylinder 2; 5 is a key groove formed vertically in the inner cylinder 2 so as to communicate the annular groove 3 with the outer surface; Locking holes drilled at appropriate intervals; 6 is a rod supported by bearings 12, 12' provided at the upper and lower parts of the inner cylinder 2, and is horizontally rotatable; 7 is a rod 7 at the upper end of the rod 6; A fixed seat base plate 8 includes a locking tool 17 and a head 2 of the inner cylinder 2, which are horizontally rotatably attached to the seat base plate 7.
0, a rotation locking device consisting of a meshing part 18 of a locking tool 17 provided at 0; 9, a longitudinal rail attached to the upper part of the seat base plate 7; 10, a seat fixed to the longitudinal rail 9; 13 is a compression spring that is inserted into the annular groove 3 of the inner cylinder 2 from the bottom 1' of the support base 1 and constantly presses the inner cylinder 2 in the upward direction; 14 is a key for the inner cylinder 2 that is inserted from the outside of the support base 1; Groove 4
The inner cylinder guide protrusion 15 is inserted into the locking hole 5 of the inner cylinder 2 from the outside of the support base 1, and is pressed in the direction of the locking hole 5 by the force of the spring S. It has a structure in which it can be released from the locking hole 5 by operation. S' is a spring that pulls the locking tool 17 toward the engaging portion 18.
In such a rotary seat, the seat portion 10 can be adjusted in the vertical and longitudinal positions and in rotation.

That is, in order to adjust the high bottom of the seat part 10, first release the stopper 15 inserted into the locking hole 5 of the inner cylinder 2 to enable vertical movement of the inner cylinder 2. is pushed up in the upward direction by the compression spring 13. The seat portion 10 may be made higher by the force exerted by the compression spring 13, or
Or conversely, push it down to lower it, and when it reaches the appropriate position, return the released stopper 15 and insert the stopper 15 into the locking hole 5 of the inner cylinder 2. is fixed to the support stand 1. At this time, stopper 15
The inner cylinder 2, which can now move up and down by releasing the
Guide protrusion 1 inserted into key groove 4 of inner cylinder 2 from outside
4 makes it unrotatable, but it can move up and down within the range of the keyway 4. Further, the back and forth sliding adjustment of the seat portion 10 is performed by adjusting the rail 9 attached to the seat base plate 7 and the seat portion 1 fitted into the rail 9, in the same way as adjustment in conventional chairs.
0, and a front-rear spacing adjuster (not shown) that locks the seat portion 10 at an appropriate position on the rail 9. When rotating the seat portion 10, first, the locking tool 17 of the rotation locking device 8 is rotated.
is released by horizontally rotating it from the engaging part 18 in the direction of the arrow in FIG. When the locking tool 17 is engaged with the meshing part 1' at that position, the rotation of the seat part 10 is stopped.

However, in such a rotary seat, rotation of the seat portion 10 is prevented only by the tensile force of the spring S'', so when used in a vehicle such as an automobile, if an unexpected and severe inertial force occurs, the spring S'' There is a risk that the locking tool 17 will come off the engaging portion 18 against the force of ``, and the seat portion 10 will rotate.

In view of the prior art, the present invention provides a rotary seat that does not rotate unexpectedly even when a severe load is applied.

The configuration of the first embodiment of the present invention will be explained using FIGS. 4 to 8.

In the figure, reference numeral 20 denotes a rotary seat according to the first embodiment of the present invention, which includes a seat support base 22 fixed to the floor F, and a rotation support shaft rotatably supported in the center of the seat support base 22 in a horizontal plane. 24, a seat 26 fixed to the rotation support shaft 24, and an attachment mechanism 28 that can fix, hold, and release the seat 26 to the seat support base 22;
It consists of a rotation control mechanism 30 that controls the rotation and locking of the seat portion 26 within the horizontal plane.

32 is a stopper that hangs down from the lower surface of the seat portion 26 and is resiliently supported by the upper surface 22a of the seat support base 22.

The rotation control mechanism 30 includes a cylindrical cam 34 hanging from the lower surface of the seat 26 and a pin 3 attached to the support base 22.
A lift-up lever 40 is rotatably supported at 6 and is formed to be able to lift up the lifting surface 38 of the cylindrical cam 34; a support roller 48 that is pivotally supported by the cylindrical cam 34, rotates so as to be slidable on the cam surface 44 of the cylindrical cam 34, and can be freely fitted into and removed from the notches 46 and 47 of the cylindrical cam 34;
The lift-up lever 40 is rotatably supported on the support base 22 by a pin 50 in a vertical plane, and is connected to the lift-up lever 40 via a rod 52 that is supported rotatably on one end 40a of the lift-up lever 40.
It consists of a lift operation lever 54 that applies rotational force to.

A lever 56 is fixed to the pin 50 and rotated together with the pin 50 by a lift operation lever 54. A lever 58 is hooked at one end to the lift-up lever 40 and at the other end to the support base 22, and is used for lifting up. A spring 60 biases the lever 40 counterclockwise, and 60 is the lift-up lever 4.
This is a lift-up roller that is pivotally supported by the other end 40b of the lift-up roller and is brought into contact with or close to the lifting surface 38. To explain in more detail, the rotation support shaft 24 has a cylindrical bearing 64 fixedly installed in a through hole 62 provided at the center of the support base 22, and bushes 66, 64 are arranged at the upper and lower ends of the bearing 64. The support base 22 is pivotally supported so as to be vertically slidable between the upper and lower notches 68 and 70.

The mounting mechanism 28 includes first and second hooks 72 and 74 hanging from the seat 26 and a pin 7 pivotally supported on the support base 22.
first and second latches 80 and 82 rotatably supported at 6 and 78 and engaged with the first and second hooks 72 and 74;
and a mountain latch 8 that connects the first and second latches 80 and 82.
4, a release lever 86 that is fixedly attached to the pin 76 and is biased in a direction in which the first latch 80 is detached from the first hook 72 when rotated in the direction B; 22, and the second latch 8 is always attached to the second latch 8.
2 is made up of a spring 88 biased in the direction of engagement with the second hook 74.

The cylindrical cam 34 has a lifting surface 3 as shown in FIG.
Reference numeral 8 denotes a vertical plane of the rotation support shaft 24, which is configured to have a length with a small co-angle of 0 on both sides of the circumference from the point of contact with the lift-up roller 60.

Here, the angle θ is determined from the relationship between the support roller 48 and the cam surface 44 of the cylindrical cam 34. That is, the cam surface 44 has notches 46 and 47 provided at 180 constant intervals on the circumference, and the support roller 48 is accommodated in both the notches 46 and 47 in a normal state. Between the notches 46 and 47 is a slope 90,
91, and the slopes 90, 91 are formed such that their intersection 92 is midway between the notches 46, 47 (that is, at a position 900 from the center of the notches 46, 47). Also, the center point X in FIG. 18 indicates the center position of the roller 48 during normal times,
Point Y indicates the center position when the seat 20 is lifted up and the roller 48 is lowered relative to the cylindrical cam 34. The starting points 94 and 96 of the slopes 90 and 91 are the rollers 4
8 is at the Y point, slightly δ from the upper end of the roller 48.
position so that it is at the top. When the sheet 20 is rotated from this state, the roller 48 moves horizontally relative to the cylindrical cam 34 and eventually comes into contact with the slope 90. If the center of the roller 48 at this time is Z, then point Y
The amount of movement from to point Z corresponds to the rotation angle of the sheet 20,
The length of the lifting surface 38 is determined by setting this angle to θ. Additionally, the rollers 48 and 60 are connected to the lifting surface 38.
and the cam surface 44, respectively, are arranged so as to have a slight gap Δ in the normal state.

Since the present invention has such a configuration, its operation will be explained next.

In the normal state, the seat 20 has a support base 22 and a stopper 32.
The lever supports the weight of the seat 20 and the weight of the occupant, and securely locks the seat 20 to the support base 22 by the first and second latches 80 and 82 and the first and second hooks 72 and 74. Next, when rotating the seat 20, first,
The release lever 86 is operated in the direction of arrow B to release the first and second latches 80 and 82.

Next, when the lift operation lever 54 is operated in the direction of arrow C, the lift-up lever 40 rotates via the lever 56 and the rod 52, and the roller 60 at the tip pushes up the lifting surface 38 of the cylindrical cam 34 and the sheet 20 be lifted up. In this state, the support roller 48 comes off the notches 46, 47 of the cylindrical cam 34 and is located at point Y in FIG. 8, and the sheet 20 becomes horizontally rotatable. Next, when the release lever 86 is released and the sheet is rotated by input, the lifting surface 38 rolls on the roller 60 at the initial stage of rotation, but the support roller 48 reaches the Z point and comes into contact with the slope 90 of the cylindrical cam 34. Since the sheet 20 is supported by the support rollers 48 at this point, the sheet 20 will not fall down even if the lift operating lever 54 is released. Proceed to rotate further and support roller 4
When the 8 force roller 48 crosses the intersection 92 of the surface 44, rotational force is generated by the weight of the sheet 20 and the other slope 91, the sheet 20 self-turns, and when the support roller 48 reaches the notch 47, the roller 48 turns into the notch. 47, the sheet 20 falls under its own weight, and the latches 80, 82 and the hooks 72, 74 engage to complete rotation. In this state, the seat 20 rotates 1800 times from the initial state, and as shown in FIG. 4, the seat 20 is reliably latched to the support base 22 by the latches 80 and 82 with its direction changed.

9 to 12 show a second embodiment of the present invention.

In this embodiment, the latch release operation of the rotation control mechanism 30 of the first embodiment is linked with the lift-up operation, and further includes a holding mechanism that maintains the lifted-up state of the seat, and an automatic mechanism that releases the holding mechanism during rotation of the seat. A release device has been added to improve operability. This will be explained below based on the figures.

In the figure, 100 is an operating mechanism section, and the operating mechanism section 100 includes:
The shaft 76 of the latch 80 is connected to the shaft 1 of the operating lever 102 at the tip.
A lever 112 to which a pin 110 that is in contact with the side 108 of the fan-shaped cam 106 fixed to the lever 110 is fixed is rotatably provided.

In addition, the lever 114 fixed to the shaft 104, which is connected to the lift-up lever 40 via the rod 52, has its installation direction relative to the line 116 connecting the center 40a of the connection point between the rod 52 and lever 40 and the center of the shaft 104. Then, set the angle α so that it is at most 15 above the medium range. Furthermore, a cam lever 124 is rotatably supported by a shaft 118 on the support base 22 on the side of the connection point center 40a of the lift-up lever 40, and has an arcuate surface centered on the pin 36 of the lever 40 and a tip notch 138. Pin 12 in contact with cam surface 120
Fix 6. A seat 20 is attached to the other end of the cam lever 124.
A convex piece 132 fixed to the lower surface of the holder and having slopes 128 and 130 in the circumferential direction on an appropriate radius around the rotational support shaft 24.
and supports a rotatable roller 134 disposed at a position where it comes into contact when the sheet 20 rotates by θ degrees or more. Moreover, this roller 134
The position of the roller 134 and the slopes 128, 130 of the convex piece 132 are such that the rotational force of the seat 20 generates a rotational force in the direction of arrow F in FIG.
Determine the contact angle with Reference numeral 136 denotes a spring that applies rotational force in a direction to press the cam lever 124 against the pin 126.

Next, the effect will be explained.

First, when the operating lever 102 is operated in the direction of the arrow E, the fan-shaped cam 106 connected by the shaft 104 rotates in the direction of the arrow E, and its side 108 touches the pin 110 of the latch lever 112.
Press to rotate the latch lever 112 clockwise.

The rotation center shaft 76 of the latch lever 112 and the fan-shaped cam 10
The rotation center axis 104 of No. 6 is L in the front and back as shown in FIG.
Since the dimensions are different, as the rotation of the fan-shaped cam 106 progresses, the pin 110 rotates the lever 112 while sliding on the side 108, and reaches the position shown by the solid line in FIG. 11. When the lever 112 is rotated to this state, the lever 112
A first latch 80 and a second latch 82 that move on a rod 84 and the first and second hooks 7 are integrated with each other via a shaft 76.
2, 74 is released. Therefore, as explained above, the lever 114 fixed to the shaft 104 is installed in a direction that is at most 151 degrees with respect to the line 116 connecting the center 40a of the connection point with the rod 52 of the lift-up lever 40 to the center of the shaft 104. Since the rotation angle of the shaft 104 is small, that is, until the latch lever 112 is rotated by the fan-shaped cam 106 to release the latches 80 and 82, the rod 52 is The displacement in the tensile direction that occurs is very small, and the lift-up lever 40 is rotated almost completely. It doesn't move. When the operation lever 102 further rotates, the lift-up lever 40 rotates via the rod 52 due to the rotation of the lever 114, and the roller 60 moves the lifting surface 38 of the cylindrical cam 34 as in the first embodiment. Push up to lift up the seat 20.

At this time, the pin 110 of the latch lever 112 is connected to the fan-shaped cam 10.
Since the pin 110 is in contact with the circumferential surface of the pin 110, even if the fan-shaped cam 106 rotates, the position of the pin 110 remains unchanged and does not rotate. That is, the configuration of the fan-shaped cam 106 and the rod 52 provides a time difference between the latch release operation and the lift-up operation, so that the seat 20 can be lifted up with one operation.

Next, the action of the cam lever 124 will be explained. When the lift-up lever 40 is rotated via the shaft 10 male lever 114 rod 52 due to the operation of the operating lever 102,
At the same time as the seat 20 is lifted up, the pin 126 on the lever -40 slides on the arcuate surface 120 of the cam lever 124. When the pin 126 reaches the tip notch 138,
The spring 136 rotates the cam lever 124,
The state shown by the solid line in FIG. 12 is reached, and the pin 126 is locked in the notch 138 of the cam lever 124. Therefore, even if the operating lever 102 is released in this state, the lifted-up seat 20 is supported by the cam lever 124 via the lever 40 and will not come down. Next, as in the first embodiment, when the sheet 20 is rotated, the rotational force of the sheet 20 causes the convex piece 132 fixed to the lower surface of the sheet 20 to move the roller 134 at the other end of the lever 124 in the direction of arrow F. Press down. For this reason, the cam lever 124 is
6, and the lift-up lever 40 is unlocked as shown by the two-dot chain line in FIG. Therefore, the lift-up lever 40 is returned to its initial state by the return spring 58. At the same time, the fan-shaped cam 106 returns to its original position.
The latch lever 112 is also returned to its original position by the latch return spring 88. Therefore, the cam lever 124 is released from the convex piece 132 when the seat 20 rotates by θ0 or more.
As described in the first embodiment, the seat 20 is supported by the cam surface 44 of the cylindrical cam 34 and the support roller 48, and will not fall down. As described above, in this embodiment, the latch release and seat lift-up are performed successively using one operating lever.

The seat holding mechanism is automatically activated when the lift-up is completed, and the holding mechanism is automatically released when the seat is rotated. Next, a third embodiment of the present invention will be described using FIGS. 13 and 14.

In this embodiment, an interlock device is provided in the second embodiment to prevent the user from sitting in a state where the seat locking device does not work during the rotation of the seat, thereby creating a danger in the event of a collision.
It is designed so that it cannot be seated during rotation. That is, the seat back 21a is rotatably supported by a hinge 140 with respect to the seat cushion 21b, and a lever 144 is fixed to the hinge 140 on the side of the seat back 21a.
At the end of the lever 144, there is a cable 1 that supports one end 148a of the outer case 146 on the seat cushion 21b.
48 inner cables 150 are connected. cable 1
The other end 148b of 48 is connected to one end 156 of an interlock lever 154 rotatably supported by a pin 152 on the lower surface of the seat cushion 21b. The other end 158 of the interlock lever 154 is arranged so as to be in contact with the tip end 80a of the first latch 80, and a rotation fulcrum 160 of the interlock lever 154 is provided on the extension of the latch 80 in the operating direction. Further, the hinge 140 rotatably supports a lock lever 164 by a pin 162, and a notch 168 is provided in a part of the seat back side arm 166 of the hinge 140. The lock lever 164 has a claw 164a in contact with the arm 166 at one end, and the other end 170 is configured to contact the upper surface of the support base 22, and is biased with a rotational force in the direction of arrow P by a spring 172.

With the above configuration, the operation is performed as follows. When an attempt is made to rotate the operating lever 102 in the E direction, the tip 80a of the first latch 80 collides with the other end of the interlock lever 154, and at this time, the center of rotation of the lever 154 is aligned with the extension of the first latch 80 in the operating direction. Because it's above
No rotational force is applied to the lever 154 and the first latch 80 is locked.

Therefore, in this state, the seat 20 cannot be unlocked from the base 22. To unlock the seat 20, first fold the seat back 21a forward, pull the inner cable 150 of the cable 148 using the lever 144, rotate the interlock lever 154 in the G direction, and then This is possible by unlocking the latch 80.

Next, when the operating lever 102 is operated, the first latch 80 is unlocked and the seat 20 is lifted up.

At this time, the seat back 21a falls forward and the arm 1
The notch 168 of 66 is the claw 164a of the lock lever 164.
The forward inclination angle β of the seat back 21a is set so as to match the angle β of the seat back 21a. Therefore, at the same time as the seat is lifted up, the lock lever 164 is rotated by the spring 172 and the pawl 164a engages with the notch 168, so that the seat back 21a is held forward and cannot be raised. Rotate the sheet 20, and when the rotation is finished, the sheet 2
When 0 goes down, the claw 1 of the lever 164 is pressed on the support stand 22.
64a is pushed in the reverse P direction, the engagement between lever 164a and arm 168 is released, and seat back 21a can be raised to its original state. When the seat back 21a is raised to its original position, the interlock lever 15 is activated by the cable 148.
4 returns to the original state and locks the first latch 80 again. As described above, in this embodiment, the seat cannot be rotated unless the seat back is tilted forward, and the seat back cannot be raised while the seat is rotating, thereby preventing the user from sitting in the seat while the seat is rotating. It is possible to
In the description, the lock lever 164 is provided on the hinge 140, but the function is the same even if it is provided on the opposite hinge 142.

Further, in the case of a reclining seatback, a lock lever 164 may be incorporated into the reclining device. As explained above, according to the present invention, the structure is such that the seat is lifted up by a cylindrical cam fixed to the lower surface of the seat, a lift-up lever and a support roller attached to a support base, and then rotated. However, since the load when the seat is in use is received by the seat itself, the support base, and the locking device, excessive load is not applied to the rotating device, and its components have the strength to support only the seat's own weight. It is possible to provide a rotatable seat that is convenient, lightweight, and inexpensive5, and can also be easily applied to large seats such as those for two or three passengers, further increasing the effectiveness of the seat and the enjoyment of driving. In addition, since the seat locking device is configured to operate automatically when the seat is lowered at the end of rotation, extremely high safety can be achieved.
In addition to the above-mentioned common effects, each embodiment has the following effects.

In the second embodiment, the seat latch is released in conjunction with the lift-up operation, the cam lever is used to maintain the lift-up state, and the cam lever is automatically released while the seat is rotating. This has the advantage of being extremely easy to operate.

Furthermore, the third embodiment is configured so that the seat cannot be seated while the seat is rotating, so it is possible to prevent the seat from being seated in a state where the seat locking device is not working and excessive load on the rotating device, resulting in high safety. This effect can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional explanatory view of a rotary seat of the conventional example, Fig. 2 is an explanatory view of the operation of Fig. 1, Fig. 3 is an explanatory plan view of the operation of Fig. An explanatory diagram of the operation of the seat of the embodiment, Fig. 5 is an explanatory diagram of the rotation mechanism of Fig. 4, and Fig. 6 is an explanatory diagram of the rotation mechanism of Fig. 5.
■ Line cross-sectional explanatory diagram, FIG. 7 is a perspective explanatory diagram of the cylindrical cam 34 in FIG. 5, and FIG. 8 is a diagram showing the cylindrical cam 34 and roller 48 in FIG. 5.
FIG. 9 is a perspective view of the seat according to the second embodiment of the present invention, FIG. 10 is an explanatory diagram of the mechanism according to the second embodiment of the present invention, and FIG. 11 is the main part of FIG. 10. Operation diagram, 12th
The figure is an explanatory diagram of the correlation operation between the lift-up lever 40 and the cam lever 124, FIG. 13 is a side explanatory diagram of the seat according to the third embodiment of the present invention, and FIG. 14 is an explanatory diagram of the arrow X in FIG. 13. . 20...Seat, 22...Support stand, 22
a...Top surface of support base, 24...Rotation shaft, 34...Cylindrical force, 38...Lifting surface, 40...・・Lift up lever, 44
...Cam surface, 46, 47... Notch, 48
... Support roller, 54, 86 ... Operation lever, 72, 74 ... Hook, 80, 82.
...Latch, 126...Pin, 154.
...Interlock lever, 164...Mourning lever, 164a...Claw, 168...
・Notch.

Claims (1)

[Claims] 1. In a rotary seat in which a seat is installed on a seat support base via a rotating support shaft so as to be able to rotate and slide vertically in a horizontal plane,
A cylindrical cam hanging down from the lower surface of the seat, a lift-up lever rotatably supported on the seat support within a sharp surface and capable of lifting a lifting surface of the cylindrical cam; a support roller rotatably supported within a plane, slidable on the cam surface of the cylindrical cam, and removably fitted into the notch of the cylindrical cam; and a support roller rotatably supported on the seat support base; A rotary seat characterized by comprising an operation lever that urges a lift-up lever to come into pressure contact with a lifting surface and releases a latch that can be freely engaged with a hook hanging from a seat.