JPS633310Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a seat rotation device, and in particular includes a fixed support mounted on the floor of a vehicle, and a rotation support rotatably supported on the support and on which the seat is placed. and a locking device for locking relative rotation between the fixed support and the rotary support.

In recent years, wagon-type vehicles 1 as shown in FIG. The seat 3 is rotatably supported forward and backward by a seat rotation device R.
Some seat belts are equipped with a stopper mechanism that stops the rotation of the seat at a predetermined position, and a lock device that locks the rotation of the seat at this stop position. Such a seat rotation device R generally includes a fixed support fixed and fixed on the vehicle body floor 5, and a rotating device rotatably mounted on the fixed support while fixedly supporting the seat 3 and rotating together with the seat 3. It consists of a support body. Further, the above-mentioned stopper mechanism consists of an abutment member attached to the rotating support side and a stopper member attached to the fixed support side. Conventionally, the abutment member and the stopper member are a relatively rigid single component or a small number of components. consisting of a rotational support and rigidly attached to the rotational support, respectively.
On the other hand, the locking device is also similar to the stopper mechanism.
It consists of an engagement piece attached to one of the rotating support and the fixed support, and an engagement hole provided in the other, and when the rotation support is stopped by the operation of the stopper mechanism, the engagement piece and the engagement hole are connected. are aligned and the lock is activated.

When manufacturing such a seat rotation device, some installation error may occur between the stopper mechanism and the lock device provided between the fixed support and the rotation support. However, as mentioned above, the components of the stopper mechanism and locking device are separated and fixedly attached to the rotating support body and the fixed support body, so if variations occur due to installation errors, the stopper mechanism or locking device There was a problem in that the work of removing the parts and adjusting the accuracy was complicated and took a long time to manufacture. Furthermore, since the abutting member and the stopper member have rigidity, there is also a problem that impact noise may be generated as the stopper mechanism operates. Furthermore, between the stopper mechanism and the locking device, the locking device is configured to lock when the rotary seat stopped by the stopper mechanism is rotated with a constant torque against the acting force of the stopper mechanism. By positioning the seat 3 at the same position, it is possible to eliminate the impact when the lock is activated and improve the usability, and when the lock device is released, the seat 3 rotates slightly even if the operator does not rotate the seat 3. It is desirable to start and increase the reliability of the rotating seat.

The present invention was made in order to solve the above-mentioned problems, and its purpose is to use an elastic body in the collision part of the stopper mechanism, to make the stopper mechanism compatible, and to make the stopper mechanism and lock device compatible. The objective is to ensure consistency between the two and improve the operability of the seat rotation device.

The gist of the present invention is a fixed support mounted on the floor of a vehicle, a rotating support rotatably supported on the support and on which a seat is placed;
In the seat rotating device comprising a locking device for locking the relative rotation of the fixed support and the rotating support, the fixed support is provided with a stopper member, and the rotating support is provided with a stopper member in contact with the stopper member. A bracket having two abutment members for stopping rotation mounted at a predetermined angular interval, and a pair of storage portions in which the stopper members are opened in opposite directions relative to the rotational direction of a rotating support; and an elastic member that is easily attached to and detached from the abutting member, and the locking device is positioned so that the elastic member is pressed by the abutment member and is elastically displaced by a predetermined amount before being activated. be. Since the stop position of the seat rotation device is made adjustable in this way, even if the precision of the parts of the seat rotation device is low to some extent, consistency can be maintained between the operation of the stopper mechanism and the operation of the lock device. . Further, since the locking device operates after the elastic member is displaced, it is possible to enhance the feeling of use during locking operation, and to ensure lock-off due to the elastic force. Furthermore, by bringing the elastic member into contact with two abutting members installed at a predetermined angular interval, the rotation of the sheet can be stopped at two predetermined locations without generating impact noise. .

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 to 4 are diagrams showing an embodiment of the present invention. Of these, Fig. 2 is a plan view of a seat rotating device equipped with a stopper mechanism according to an embodiment of the present invention, Fig. 3 is a partially cutaway side view of this seat rotating device, and Fig. 4 is a plan view of the seat rotating device. It is a component of the stopper mechanism that can be attached and detached from the stopper mechanism. In this embodiment, the seat rotation device R is a vehicle body floor 5.
It consists of a fixed support constituted by a base 6 fixed above and a pedestal 7 fixed to the base 6, and a rotating support 8 rotatably supported by the pedestal 7. The base 6 is made of a metal plate formed into a substantially tray shape, and when it is turned upside down, the floor 5
is placed on top. Furthermore, beads 9 and 10 for reinforcing the plate are integrally molded on the flat surface of the base 6. Like the base 6, the pedestal 7 is formed by molding a metal plate into a tray or dish shape, and has a circular opening 11 in the center of the bottom plate 13, and a flange extending substantially horizontally on the outer periphery. 12, and an inclined portion 14 that gradually widens from the bottom plate 13 to the flange portion 12 is formed. The pedestal 7 is fixed to the base 6 at the bottom plate 13 by means such as rivets or welding, thereby forming a fixed support.

The rotary support body 8 is composed of an upper plate 15 having an opening 17 in the center and bent downward around the opening, and a lower plate 16 joined to the lower surface of the upper plate 15. The upper plate 15 usually has a rectangular or circular planar shape as shown in FIG. 2, depending on the shape of the sheet 3 placed on the upper surface. On the other hand, the lower plate 16 consists of a ring-shaped body formed in an inverted hat-like stepped shape from the outer circumference to the inner circumference, and is joined to the lower surface of the upper plate 15 and between the upper plate 15 and the lower part of the lower plate step. A gap is formed between the two. Within this gap,
Shoes 18 and 19 are fixed to the upper plate 15 and the lower plate 16 in pairs in the vertical direction, respectively, at predetermined intervals in the circumferential direction. Then, the rotation support body 8 inserts the flange portion 12 of the pedestal 7 into the gap between the upper plate 15 and the lower plate 16, and the shoe 18,
19, and can be rotated by relative sliding motion between the shoes 18, 19 and the flange portion 12.

The rotation support 8 also has an operating lever 2 at one end.
1 and rotatably attached to the rotation support 8 via a bearing 22;
An engagement piece 23 fixed at 0 is provided, while
A pair of engagement holes 24 and 25 are formed in the pedestal 7 to receive and hold the tip of the engagement piece 23, thereby forming a locking device. The shaft 20 is loaded with a spring 26, which has one end engaged with the rotating support 8 and the other end engaged with the shaft to constantly bias the shaft 20 in the locking direction. ing. On the other hand, the engagement holes 24 and 25 are formed in the inclined part 14 of the pedestal 7, and when the rotation support 8 is rotated by a predetermined angle (for example, 180 degrees), the engagement holes 24 and 25 are formed in the engagement piece 23.
match and lock the locking piece 23,
They are arranged at a predetermined angular interval with respect to the center of the pedestal 7. As shown in FIGS. 2 and 3, between the base 6 and the rotating support 8, two pins 30 and 3 are provided as abutting members on one side.
1 is attached, and a stopper member 3 is attached to the other side.
2 is attached, and both members form a stopper mechanism. The pins 30 and 31 are attached to the back side of the rotary support 8 at a predetermined angular interval. On the other hand, the stopper member 32 has two storage sections 36 and 3 that are opened in opposite directions in the rotational direction of the rotary support 8.
7, and this bracket 3
Cushion members 34 and 35 made of an elastic material such as rubber are fitted and supported in each of the storage portions 36 and 37 of No. 3.
It is attached and fixed at one place on the base 6. The bracket 33 is made up of two metal fittings formed into a substantially U-shaped cross section and joined back to back to each other, and notch holes 39 and 40 are formed from the outward facing side wall of the seat rotation device R to the partition wall portion 38. . On the other hand, the cushion members 34 and 35 are made of a block body that is molded to fit into the housing portions 36 and 37 of the bracket 33, and have ribs 41 and 42 on the outer surface thereof that fit into the notch holes 39 and 40.
is integrally molded. In this embodiment, the pins 30 and 31 of the stopper mechanism and the stopper member 32 are arranged so that when the seat 3 is rotated approximately 180 degrees from the forward facing state to the rearward facing state or vice versa,
The pin 30 or 31 is set to abut against a stopper member 32 to stop the rotation of the seat 3 and the rotating support 8. On the other hand, regarding the locking device, when the rotating support 8 is stopped by the stopper mechanism as described above and a certain amount of elastic energy is accumulated in the cushion member, the engaging piece 23 is aligned with the engaging hole 24 or 25. The lock is set to operate. Furthermore, the rotation angle stroke of the seat 3 does not have to be set to 180 degrees as described above, but may be set to, for example, 90 degrees or any other angle.

With such a configuration, when the rotating support 8 is rotated in the clockwise direction indicated by the arrow S in FIG. 2, the engagement piece 23 moves in the direction shown in FIG. It slides in contact with the inclined portion 14 of the pedestal 7 as shown by the dashed line. And engagement piece 2
3 comes slightly in front of the position where the pin 30 matches the engagement hole 24, the pin 30 comes into contact with the cushion member 34. When the rotary support 8 is still rotated in the direction of the arrow S from this contact state, the cushion member 34 is pressed by the pin 30 and is elastically displaced, allowing the rotary support 8 to rotate by a minute angle. do. Then, when the rotary support body 8 rotates by the above-mentioned minute angle, the engagement piece 23 of the locking device matches the engagement hole 24, and the engagement piece 23 snaps under the action of the spring 26, as shown in FIG. It fits into the engagement hole 24 as shown by the solid line. The rotary support 8 is thus locked, fixing the seat 3 in the forward (or rearward) position.
During this operation, if the pin 30 comes into contact with the cushion member 34 due to variations in the positional relationship between the pin 30 and the stopper member 32, and the locking device is activated before a certain amount of elastic deformation occurs. , the rib 41 of the cushion member 34 and the cutout hole 3 of the bracket 33 using a screwdriver or other tool.
9, the cushion member 34 is removed from the bracket 33, and replaced with another cushion member having a larger length dimension. Conversely, if the pin 30 hits the cushion member 34 and the locking device does not operate even if the cushion member 34 is further elastically deformed to a certain extent or more and the rotary support 8 is rotated, the locking device will not operate as described above. The cushion member 34 is then removed from the bracket 33 and replaced with another cushion member having a smaller length dimension. In this way, the alignment between the stopper mechanism and the locking device can be accurately adjusted, and the amount of elastic displacement of the cushion member 34 when the locking device is operated can be adjusted as appropriate. It will lock when pressed with a certain force. On the other hand, when the locking device is released from this locked state, the engagement piece 23 is disengaged from the engagement hole 24 and at the same time the pressing force that was elastically displacing the cushion member 34 is released, so that the pin 30 is The elastic repulsive force of the member 34 pushes it back in the direction opposite to the direction of rotation during the lock operation. As a result, sheet 3 is slightly
The passenger can sense the release of the locking device. Therefore, even if the operating lever 21 is released at this point, the locking device will not be locked, and the seat 3 can be rotated smoothly.

Next, in order to rotate the seat 3 in the opposite direction, when the operating lever 21 is rotated in the direction of arrow P in FIG. 3, the shaft 20 rotates and the engagement piece 23 is released from the engagement hole 24. In this state, when the seat 3 and the rotating support 8 are rotated in the counterclockwise direction indicated by the arrow T in FIG. Move toward the destination. When the engagement piece 23 comes to a position where it almost matches the engagement hole 25, the pin 31 is inserted into the cushion member 3.
5 and stops the rotation of the rotating support 8.
Thereafter, when the rotating support 8 is further rotated in the direction of the arrow T, the cushion member 35 is pressed by the pin 31 and is elastically displaced, and when this amount of displacement reaches a predetermined value, the locking device is activated. sheet 3
Fix it in the opposite direction from the top. During this operation, if a similar situation occurs between the pin 31 and the stopper member 32 due to variations in the arrangement, etc., as when the rotating support 8 is operated in the direction of the arrow S, the cushion member 35 Bracket 33
Simply remove it from the cushion and replace it with another cushion member. This improves the consistency between the stopper mechanism and the lock device, and allows the amount of elastic displacement of the cushion member 35 to be adjusted as appropriate. and,
At the same time as the locking device is released, the seat 3 begins to rotate in the opposite direction, ensuring that the lock is released. Further, the stopper member 32 is provided with cushion members 34 and 35 made of an elastic material, and these are designed to receive the pins 30 and 31. Even in such a case, the rotation of the rotary support 8 can be gently stopped, and the bounce and impact noise generated when the rotation of the seat 3 is stopped can be greatly reduced. can get. Further, since the rotation support body 8 is always biased in a fixed direction by the cushion member 35, rattling noise is less likely to occur during running.

It should be noted that, instead of molding the cushion members 34 and 35 from an elastic material such as rubber, there is no problem in constructing them from an elastic mechanism such as a replaceable spring.

As described above, according to the seat rotation device of the present invention, a stopper mechanism having an elastic structure is disposed between the fixed support and the rotating support, and the elastic member of this stopper mechanism can be easily attached and detached from the bracket. Therefore, even if the component precision of the seat rotation device is relatively low, it can be easily corrected by replacing the elastic member, and the consistency of the positional relationship between the stopper mechanism and the lock device can be improved.

In addition, the lock device is positioned so that it operates after the elastic member is pressed by the abutment member and is elastically displaced by a predetermined amount, which increases the feeling of use during lock operation. When released, the seat can be rotated slightly by the elastic force of the elastic member, so that the seat rotating device can be reliably locked off.

Furthermore, according to the present invention, two abutting members are attached at a predetermined angular interval, and the elastic members are fitted into a pair of storage portions that are opened in directions opposite to each other with respect to the rotational direction of the rotating support. It is possible to stop the rotation of the seat at two positions, the normal lock position (forward position) and the rotation lock position (rearward position) of the seat, without generating an impact sound.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the interior of a vehicle equipped with a seat rotation device to which the present invention is applied, FIG. 2 is a plan view of the seat rotation device according to the present invention, and FIG. 3 is a seat rotation device according to the present invention. A- in Figure 2 shows the structure of
Side view partially cut along line A and line B-B, No. 4
The figure is a perspective view showing a state in which the elastic member in the stopper mechanism of the seat rotating device according to the present invention is replaced. 1...Vehicle, 2...Driver's seat, 3...Second seat, 4...Third seat, 5...Floor, 6...
...base, 7...cradle, 8...rotation support, 20
... Shaft, 21 ... Operation lever, 23 ... Engagement piece, 24, 25 ... Engagement hole, 26 ... Spring, 3
0, 31... Pin (matching member), 32... Stopper member, 33... Bracket, 34, 35... Cushion member, 39, 40... Notch hole, 41, 4
2...Rib.

Claims (1)

[Scope of claim for utility model registration] A fixed support mounted on the floor of a vehicle,
A sheet rotation device comprising a rotation support rotatably supported on the fixed support and on which a sheet is placed, and a locking device for locking relative rotation between the fixed support and the rotation support, the fixed support comprising: A stopper member is provided on the rotary support body, and two abutting members are attached to the rotary support body at a predetermined angular interval to stop the rotation of the rotary support body by contacting the stopper member, and the stopper member is attached to the rotary support body. The locking device includes a bracket having a pair of storage portions that are opened in directions opposite to each other with respect to the rotational direction of the lock device, and an elastic member that is easily attached to and detached from the storage portion of the bracket. A seat rotating device characterized in that it is positioned so that it operates after being pressed by a mating member and elastically displaced by a predetermined amount.