JPS6030209B2 - seat structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat structure that can be used as a seat or a bed depending on the user's preference.

For example, it is desirable to have a seat for an attending nurse in a hospital that can be used as a regular seat during the day and as a cot at night, and that can also be used as a cot during treatments such as dialysis. is desired.

Furthermore, it can also be used as a seat for large vehicles for long-distance driving.
There is a demand for something that can be used as a seat or a bed depending on the user's preference.

The object of the present invention is to meet such demands, and to be able to be used as a seat, a bed for treatment or rest, depending on the user's preference and purpose, and which allows even adults to stretch out their bodies and fully stretch their legs when used as a bed. This provides a seat structure with a sense of stability on which one can stretch out and rest one's feet for treatment or rest, and this will become clear from the detailed description below with reference to the drawings. 1 to 4 show an embodiment of the present invention, in which the front and rear legs 1
, 2, and a reclining seat back 5 having a substantially 〈-shaped arm 7;
Headrest 6 and seat back 5 attached to this
gas spring 9, which is a locking mechanism, a seat cushion 29, and a footrest 34 arranged on the front end side of the
, a moving operation means for moving the footrest 34 from a position where it supports the seat cushion 29 to a forward position, and an armrest 43.

As shown in Fig. 1, the front legs 1 that make up the legs of the seat are formed in an R-shape when viewed from the side, and the rear legs 2 are formed in an H-shape when viewed from the same side. leg 1,
2 are combined to form a set of legs, which are installed on both sides of the seat.

A side cover 3 is attached to the leg, and channel-shaped guide rails 4 are attached to both sides of the leg near the front half.

As shown in FIG. 1, the seat back 5 rotates rearwardly around a pin 8 provided near the lower end of the arm 7 from the upright state of use as a seat shown in FIG. The seat back 5 is configured so that it can be rotated and set in an almost horizontal state, which is the usage mode as a bed. As shown in FIG. 3, the gas spring 9, which is the locking mechanism for the seat back 5, includes a cylinder 10, a free piston 11 inserted with iron inside the cylinder 10, and a piston 12 separately inserted into the cylinder 10. , a piston rod 13, a valve built into the piston 12, and a push rod 2 for opening the valve.
3.

The inside of the cylinder 0 is divided by a free piston 11 into a gas chamber 14 and an oil chamber, and the oil chamber is divided by a piston 12 into first and second oil chambers 15 and 16. The valve includes a valve chamber 17 formed inside the piston 12, a ball 19, a compression spring 20 that presses it toward the valve seat 18, an oil passage 21 connecting the first oil chamber 15 and the valve chamber 17, and a valve. It is composed of an orifice 22 that connects the chamber 17 and the second oil chamber 16. The cylinder 1 of the gas spring 9 is connected to the end of the front leg 1 via a pin 24 to a clevis type, and the piston rod 13 is connected to a bracket 25 formed at the end of the arm 7 of the seat back 5.
The push rod 23 is hingedly connected by a bracket 26 attached to the end of the piston rod 13 and a pin 27, and the push rod 23 is connected to a lever 28 that swings about its lower end as a fulcrum. And this gas spring 9 and the lever 2
Operate 8 and F. - Pushing the bushing rod 23 toward the inside of the cylinder 10 opens the valve and releases the locking action. After releasing the locking action, adjust the seatback 5 to the desired angle and release the lever 28 to release the compression spring. 2
0, the valve closes and the seat back 5 can be locked at any adjusted angle. As shown in FIG. 1, the seat cushion 29 is attached to a rear end side of the seat cushion 29 and a bracket 30 attached above the pin 8, which is the center of rotation of the arm 7 of the seat back 5. The seat cushion 29 is hinged to the arm 7 via a bracket 31 and a pin 32, and is supported by the guide rail 4 via a guide roller 33 provided at the front end of the seat cushion 29.

When the seat back 5 is rotated rearward, the seat cushion 29 is pulled by the arm 7 of the seat back 5, follows the seat back 5, and can move rearward along the guide rail 4. It looks like this. As shown in FIG. 1, the footrest 34 has a guide roller 33 on the rear end side, is supported by the guide rail 4 via the guide roller 33, and extends in parallel along the guide rail 4. It is designed to be movable.

The means for moving the footrest 34 includes a connecting rod 36 and an actuating link 38, as shown in FIGS. 1 and 2.

One end of the connecting rod 36 is connected to the lower end of the arm 7 of the seat back 5 by a pin 37, and the other end is connected to approximately the middle of the operating link 38 via a pin 39.
One end of the operating link 3-8 is pivotally supported by a pin 40' at approximately the middle of the front part of the front leg 1, and the other end is supported by a bracket 41 attached to the footrest 34 and the pin 4.
2 to the footrest 34. The footrest 34 moving operation means moves the footrest 34 forward from the position where it supports the front end of the seat cushion 29 through the arm 7, the connecting rod 36, and the operating link 38 when the seatback 5 is tilted rearward. It is configured to be easy to use. The armrest 43 is
As shown in FIG. 1, the front end is supported by a link 44, and the rear end is supported by the seat back 5 via a pin 47.

The lower end of the link 44 is pivotally supported on the side of the seat cushion 29 by a pin 45, and the upper end is connected to the armrest 43 via a pin 46. Therefore, the armrest 43 is connected to the seat back 5 and the seat cushion 29.
It is linked so that it can follow the movement of. The seat structure of the above embodiment is operated and used as follows.

When used as a seat, as shown in Figure 1,
The seat back 5 is maintained in an upright state, a footrest 34 is in contact with the front end of the seat cushion 29 and forms part of the seat cushion, and an armrest 42 is maintained in a substantially horizontal state.

When used as a seat, the lever 28 connected to the push rod 23 of the gas spring 9 is swung clockwise in FIG. paul 19
is pressed, the valve is opened, and the locking action of the gas spring 9 is released.

When the locking action of the gas spring 9 is released and the seat back 5 is rotated rearward, that is, tilted in the direction of arrow a in FIG. 1, the seat back 5 rotates about the pin 8 through the arm 7. The seat back 5 and the headrest 6 move rearward together, and as a result, the seat cushion 29, which is connected to the seat back 5 at the pin 32, connects with the guide rail 4 and the guide roller 33 and moves backward as shown in FIG. It moves backward in parallel as shown by arrow b.

At the same time, the footrest 34 is connected to the arm 7 and the connecting rod 3.
6. Through the movement of the operating IJ link 38, arrow c in FIG.
As shown in the figure, the guide rail 4 and the guide roller 35 move in parallel to the front via the iron joint. Further, the armrest 43 moves following the movement of the seat back 5 and the seat cushion 29. Next, when the seat back 5 is rotated to a nearly horizontal state, which is the state in which it is used as a bed, the seat back 5, headrest 6, and seat cushion 29 move a certain distance backward, and the footrest 34 moves forward. Move a certain distance m.

In this state, when the lever 28 for operating the gas spring 9 is released, the valve of the gas spring 9 is closed by the compression spring 201, and the piston 12 is fixed in the cylinder 10, and the piston rod 13 connected to the piston 12 and this As described above, the seat back 5 is locked at an angle adjusted to a substantially horizontal state through the arm 7 connected to the arm 7, whereby the various movable members are fixed in the usage configuration as a bed shown in FIG. 28 is returned to its original position. In this type of use as a bed, the seat back 5, headrest 6, and seat cushion 29 move a certain distance rearward and are set almost on the same plane, and the footrest 34 moves forward a certain distance m in parallel. Even adults can stretch out their bodies, stretch their legs and place their feet on the footrest 34 to receive treatment, or it can be used as a simple bed where they can take a rest.

In addition, in this usage form as a bed, armrest 4
3 functions as a guard. When returning from the aforementioned usage mode as a bed to the usage mode as a seat, the lever 28 for operating the gas spring 9 is swung clockwise in FIG. 4 to release the locking action of the gas spring 9. Then, when the seat back 5 is raised, the seat back 5 rotates around the pin 8 and moves forward, the seat cushion 29 is pushed forward by the seat back 5 and moves forward, and the footrest 34 is moved forward by the arm 7. ,
The armrest 43 moves rearward while being towed by the connecting rod 36 and the operating link 38, and the armrest 43 moves following the seat back 5 and seat cushion 29, and each moving member returns to its usage as a seat as shown in FIG. do.

In this state, when the lever 28 for operating the gas spring 9 is released, the seat back 5 is locked by the locking action of the gas spring 9, and as a result, each movable member is also fixed in position.

Note that the seat back 5 can also be used while being fixed at an arbitrary angle between the angles shown in FIGS. 1 and 4 by the locking action of the gas spring 9.

Further, the present invention can be applied to a vehicle without a headrest or armrest, and the means for locking the seat back 5 is not limited to the illustrated gas spring 9, and the seat back 5 can be fixed at any adjusted angle. The means for moving and operating the footrest 34 is not limited to the arm 7, connecting rod 36, and operating link 38 of the seat back 5 shown in the drawings, but the point is that the seat back 5 can be used not only as a seat but also as a bed. Any mechanism may be used as long as it can move the footrest 34 a certain distance forward from the position where it contacts the front end of the seat cushion 29 when the footrest 34 is tilted to the usage mode.

The above is an embodiment of the seat structure according to the present invention. According to this structure, when the seat back is rotated from the usage mode as a seat to the almost horizontal state where it is used as a bed, the seat back The seat cushion moves backwards and the footrest moves forward, making it possible to create a long bed, so even adults can stretch their bodies and
It has the effect of allowing you to fully stretch your legs and place your feet on the footrest to receive treatment with a sense of stability, or to take a rest.
Furthermore, it can be used as a seat and bed for long-distance vehicles.
It has excellent efficacy.

It should be noted that the above description merely shows embodiments of the present invention, and it is obvious that various modifications and changes may be made without departing from the spirit of the present invention.

[Brief explanation of drawings]

Figures 1 to 4 show an embodiment of the present invention, in which Figure 1 is a longitudinal side view of how it is used as a seat, Figure 2 is a gas spring that is a locking mechanism for the seat back, A plan view showing the mounting position of the footrest moving operation means with the connecting rod, FIG. 3 is a diagram explaining the principle of the gas spring,
FIG. 4 is a longitudinal sectional side view of the usage form as a bed. In the figure, 1, 2...front and rear leg parts, 5...seat back, 6...headrest, 7...arm, 8...pin that is the center of rotation of the seat back, 9...gas spring that is the locking structure of the seat back , 29... seat cushion, 34...
Footrest, 36... Connecting rod constituting movement operation means for the footrest, 38... Same operation link, 43... Armrest. Figure 1 Figure 2 Figure 3 Figure Dimensions

Claims (1)

[Claims] 1. In a seat equipped with a seat cushion and a reclining type seat back, a footrest, which constitutes a part of the seat cushion together with the seat cushion when used as a normal seat, is disposed on the front end side of the seat cushion. One end of a connecting rod is hinged to a position below the center of rotation of an arm extending below the seat back, the other end of the connecting rod is connected to an intermediate position of an operating link, and one end of the operating link is The other end of the front leg is pivotally connected to the footrest, and when the seatback is rotated rearward about the center of rotation of the arm in a substantially horizontal state, the seat cushion and the seatback are connected in series. The seat structure is characterized in that as the footrest moves rearward, the connecting rod is pushed forward, the operating link rotates around the pivot of the front leg, and the footrest moves forward.