JPS6018585B2 - Safety swivel seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A conventional rotation-converting wide-reclining seat has a seat that can be widened, has a backrest that can be reclined by a free lock, and can change direction by rotating a rotary part. There have been disadvantages in that it rotates while widened, causing problems, or reclines during rotation, causing inconvenience.

The present invention was created in order to eliminate the drawbacks of such a follower, and includes a rotation prevention device that prevents the rotation of the rotating part when the width is widened, and also includes a rotation prevention device that prevents rotation of the rotating part in the widened state. A reclining prevention device is provided to prevent the free lock from shifting from its minimum reclined position.

The configuration of the present invention will be explained below with reference to rigid surfaces of embodiments of the present invention. First, the main correspondence between the symbols on the screen and the names of the parts will be explained. 1 is the rotating part, 2 and 3 are the rotation prevention discs, and 4 is the reclining prevention device.

A front guide groove 6 is provided in the left-right direction in the front part of the rotating part 1 rotatably provided on the fixed base 5, and a rear guide groove 7 is provided in the left-right direction in the rear part. The left and right sides shall be determined from the seater's perspective. The left seat frame 8 and the right seat frame 9 have a front guide groove 6 and a rear guide groove 7, respectively.
It is supported so that it can move from side to side. A left pin 10 is slidably supported by the rotating part 1 and whose tip is passed through an appropriate number of adjustment holes 36 bored in the left seat frame 8.

A right pin 11 is provided which is slidably supported by the rotating part 1 and whose tip is passed through an appropriate number of adjustment holes 37 bored in the right seat frame 9.

In the normal state where the left pin 10 is passed through the adjustment hole 36, the left seat frame 8 cannot be slid, and the left seat support 12 fixed thereon cannot be widened or contracted. Can not.

In the normal state where the right pin 11 is passed through the adjustment hole 37, the right seat frame 9 cannot be moved, and the right seat rest 13 fixed thereon can be widened or shortened. I can't.

Operate the operating body 44 provided at the front of the spreader part 1, pull out the left pin 10 and right pin 11 from the adjustment holes through the element against the bias of the spring, and then pull out the left pin 10 and the right pin 11 from the adjustment holes. to be able to work freely,
The width of the left seat rest 12 and the right seat rest 13 can be increased or reduced, respectively.

Rigidity indicates a reduced width state in which the distance between the left seat rest 12 and the right seat rest 13 is minimized.

A reclining prevention cam 14 and a rotation prevention cam 15 are fixed to the fixed base 5 at the upper part of the rotation part 1 along the center of the rotation scales of the rotating part 1.

Reclining prevention recesses 16 and 17 are formed on the periphery of the reclining prevention cam 14 at positions symmetrical to each other with respect to the center of rotation.

The reclining preventing piece 18 is engaged with the reclining preventing recess 16 by the biasing force of the spring 19, and since the reclining preventing piece 18 is provided on the rotating sardine part 1, in this engaged state, the rotating part 1 is movement is being prevented.

The reclining preventing piece 18 is connected to the reclining preventing device 4 through a movement preventing element 201, and the reclining preventing device 4 prevents the free lock 21 from changing from its minimum reclining position. However, when the spreader part 1 begins to rotate and the reclining prevention piece 18 comes off the reclining prevention recess 16 and rides on the periphery of the reclining prevention cam 14, the movement prevention element 20 loosens and the reclining prevention device 4 is activated by the bias of the spring 22. It goes around the pin 23 and enters in front of the front green of the cylinder 24 at the rear of the free lock 21 to prevent the free lock 21 from moving from its reclined maximum position. The free lock 21 and the reclining structure thereof can be a known structure.

A rotation prevention recess 2 is bored in the circumferential edge of the rotation prevention cam 15. A rotation prevention piece 3 is provided on the rotation part 1, which is not always engaged with the rotation prevention recess 2 due to the bias of a spring 25, but is engaged when pulled by a rotation prevention element 26 or 27. There is. The rotation blocking element 26 is connected to the left seat frame 8, and in the rest state, the width is shortened so that it is not pulled, but the left seat rest 12 is widened to the left and pulls the rotation blocking element 26. The rotation blocking piece 3 engages with the rotation blocking recess 2. Rotation prevention cam 15
Another rotation-preventing recess 2 is bored at a position symmetrical to this one rotation-preventing recess 32 with respect to the center of the rotation.
The rotation prevention cable 27 is connected to the right seat frame 9, and is contracted and not tensioned in the circle state, but when the right seat rest 13 is widened to the right and the rotation prevention element 27 is pulled. Rotation blocking piece 3
is engaged in the rotation 4 blocking recess 2 on the other hand. That is, even if either the left seat rest 12 or the right seat rest 13 is widened, the rotation prevention piece 3 engages with the rotation prevention recess 2 on the other hand.

A direction fixing piece 28 is provided on the covering part 1 and is engaged with the other rotation preventing recess 2 by the bias of a spring 29.

A piston rod 30' that is inserted into the cylinder 24 from its front edge and forms the front part of the free lock is fixed to the left seat frame 8 or the right seat frame 9 by a front pivot point 31.

The backrest 32 is supported by a back frame 34 which is pivotally connected to the left seat frame 8 or the right seat frame 9 by a back pivot point 33, and the rear end of the cylinder 24 is connected to the lower end of the back frame 34 by a rear pivot point 35. It is pivoted.

The rotation prevention element 26 is connected to the left seat frame 8 with a spring 38 interposed therebetween.
7 is connected to the right seat frame 9 with a spring 39 interposed therebetween.

The rotation blocking piece 3, the reclining blocking piece 18, and the direction fixing piece 28 are pivotally attached to the rotating portion 1 by pins 40, 41, and 42, respectively.

Since the present invention has such a configuration, its functions and effects are as follows.

In the rigid case, the seats 12 and 13 are fixed in the forward direction by the direction fixing piece 28 engaging with the other rotation preventing recess 2.

In this state, the rotation prevention device consisting of the rotation prevention recess 2 and the rotation prevention piece 3 is not engaged and is in the released state, so the direction fixing piece 28 is operated by operating the operation body 44. The engagement with the other rotation preventing recess 2 is released by pulling the direction element 43, the rotating sardine part 1 is rotated 180 degrees, and the abutments 12, 1 are
3 can be turned in the opposite direction.

During the change from the normal direction to the reverse direction, the reclining prevention piece 18 rides on the periphery of the reclining prevention cam 14, and the free lock 21 is prevented from changing from its reclining minimum position. Even if the reclining operation button 45 or the operating body 44 is operated, the reclining position cannot be changed from its minimum posture.

Therefore, there is no need to recline too much during a direction change, thereby eliminating the drawbacks of the prior art. In the opposite posture, the reclining prevention piece 18 is depressed into the reclining prevention recess 17,
The reclining prevention device 4 does not prevent reclining. Therefore, it is possible to freely recline in the forward or reverse direction.

When the seats 12 and 13 are both in the reduced width state as in the garden, the rotation prevention devices 2 and 3 are solved, so the rotation part 1
is free to rotate, but the rotation of the spreading part 1 is prevented because either or both of the seats 12 and 13 are engaged with the spreading prevention devices 2 and 3 that widen the width. In other words, there is no problem caused by rotation in the widened state. Therefore, the conventional drawbacks can be eliminated. Even in the case of the opposite direction, since the spreading prevention piece 3 is engaged with the other rotation prevention recess 2 in the widened state, it will not be rotated as it is.

In this way, according to the invention, the drawbacks of the subordinate are eliminated,
It is possible to obtain a rotation/width reclining seat that does not rotate while widened, causing problems, or recline during rotation, which does not cause any inconvenience, and is of great industrial value. . spring 38,
39 acts as a cushion, and does not cause strain on the operation of the sardine inhibitors 26 and 27.

[Brief explanation of the drawing]

0 Fig. 1 is a top view with the seat removed, Fig. 2 is a cutaway front view, Fig. 3 is a cutout side view, and Fig. 4 is a cutout rear view of the vicinity of the adjustment hole. In the figure, 1 is a rotating part, 2 and 3 are rotation prevention devices, 4 is a reclining prevention device, and 21 is a free lock. Figure 1 Figure 4 Figure 2 Figure 3

Claims (1)

[Claims] 1. A backrest is provided on a seat frame which is rotatably supported on a fixed base and is supported to be widenable relative to a rotating part that can change direction. The configured rotation conversion widening reclining seat is equipped with a rotation prevention device that is provided on the rotation part and starts engaging with the fixed base in conjunction with the start of widening of the seat frame, and A safety rotation conversion device comprising a reclining prevention device that starts moving to a position that prevents the start of reclining by interlocking with a fixed base.