JP2002154359A - Retractable seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a retractable seat not to extensively increase weight of the seat and to satisfy a static strength matter of ISOFIX. SOLUTION: A long link 450 one end part of which is mounted on the side of a seat back 300 free to rotate and the other end side of which is mounted on an intermediate part of a front link 430 is provided, the long link 450 and the front link 430 are set in shapes where a slot 453 and a pin 433 fit in each other and a pin 455 makes constantly contact with an end part of the slot 453 in a state free to be seated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a seat cushion and a seat back provided at the rear of the seat cushion. A child seat conforming to ISOFIX can be mounted on the seat back. The present invention relates to a storage seat in which the seat cushion also sinks in a forward and downward direction, and the seat back is superimposed on the seat cushion and is in a storage state.

[0002]

2. Description of the Related Art FIG. 5 shows an example of a conventional storage sheet. In the figure, a front bracket 1 and a rear bracket 3 are fixed on a floor F.

On the other hand, a seat back 7 of the seat 5 is provided to be tiltable via a hinge pin 9 provided on the rear bracket 3. At the front of the seat cushion 11,
The upper end side of an inverted "U" -shaped front link 13 whose lower end is rotatably mounted on the front bracket 1 is rotatably mounted.

The other end of a substantially “L” -shaped stay 15 having one end fixed to the seat cushion 11 is rotatably attached to the seat back 7. Therefore, floor F, front bracket 1, rear bracket 3, front link 13, seat cushion 11, stay 15
And the seat back 7 form a four-bar rotation mechanism.

In the use state shown in FIG. 5, the operation of the four-bar rotating mechanism is prohibited by a reclining mechanism (not shown) for preventing the seat back 7 from tilting. Next, the operation will be described with reference to FIG. 6 showing the stored state of the sheet shown in FIG.

When the reclining lock mechanism is unlocked and the seat back 7 is tilted forward from the state shown in FIG. 5, ie, a seatable state (hereinafter referred to as a use state), the seat back 7 is interlocked with the forward tilt. As a result, the seat cushion 11 sinks forward and downward, and the state shown in FIG.

[0007]

A method of fixing a child seat (ISOFIX) of ISO (International Organization for Standardization) standards for the purpose of preventing erroneous use of a child seat, improving vehicle compatibility, and internationally unifying the mounting method was adopted in 1999. 1
The month was decided.

The greatest feature of this standard is a secure and easy fixing mechanism to the vehicle. As shown in FIG. 7, an anchor 31 is provided between the seat back 7 and the seat cushion 11, and the child seat 33 side is provided. Is provided with a lock mechanism 35 which can be disengaged from the anchor 31.

[0009] When a child seat corresponding to ISOFIX is mounted, static strength requirements are also defined in ISOFIX. That is, a static load device (Staticforce app) defined by ISOFIX
When the application device (S-FAD) is engaged with the anchor of the seat, and a static load in the forward direction is applied to the load point of the static load device, the displacement at the load point A is defined. ing.

However, when the anchor is provided on the storage sheet 5 having the structure as shown in FIG. 5, the static load applying device 37 is set, and the front load 13 is applied to the load applying point A, the front link 13 Generates a bending moment M.

In this case, when the front link 13 buckles or the front link 13 rotates with the lower part as a fulcrum, the seat cushion moves, and the displacement target at the load point A specified in IOSFIX cannot be achieved. There is.

In the structure shown in FIG. 5, it is necessary to increase the rigidity of the frame of the front link 13 and the seat cushion 11 in order to achieve the above-mentioned displacement target, and the weight of the seat increases significantly. is there.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object the problem that the weight of the sheet does not increase significantly,
An object of the present invention is to provide a storage sheet that can satisfy the static strength requirements of SOFIX.

[0014]

According to a first aspect of the present invention, there is provided a seat cushion comprising a seat cushion and a seat back provided at a rear portion of the seat cushion.
In a storage seat in which a child seat corresponding to OFIX can be mounted, the seat cushion sinks forward and downward in conjunction with the forward tilt of the seat back, and the seat back is superimposed on the seat cushion to be stored. A reclining mechanism that allows the seat back to tilt, a front link whose lower end is rotatably attached to the floor, and a front end that is rotatably mounted to the upper end of the front link, and when the seat back tilts, A cushion frame whose rear end side is rotatably attached to the seat back so that the front link also tilts in the same direction, and stopper means for prohibiting movement of the front link in the forward falling direction in a seatable state. It is a storage sheet provided with.

By providing stopper means for prohibiting the front link from moving in the forward falling direction in a state where the seat can be seated, the front link can be mounted even when a child seat compliant with ISOFIX is mounted and a forward load is applied. Buckles hardly, and rotation around the lower fulcrum of the front link is also prohibited. This satisfies the static strength requirements of ISOFIX and eliminates the need to increase the rigidity of the front link and the frame of the seat cushion. Also, the weight of the seat does not increase significantly.

According to a second aspect of the present invention, there is provided a seat cushion and a seat back provided at a rear portion of the seat cushion. A child seat conforming to ISOFIX can be mounted on the seat back. A reclining mechanism that allows the seat back to be tilted, and a lower end portion that is rotatable toward the floor side, in a storage seat where the seat cushion also sinks in a forward and downward direction and the seat back is superimposed on the seat cushion and is in a stored state. The attached front link, the front end side is rotatably attached to the upper end side of the front link, and when the seat back tilts, the rear end side is rotatable with the seat back so that the front link also tilts in the same direction. With the cushion frame attached and one end part facing the seat back A long link rotatably mounted, the other end of which is rotatably mounted at an intermediate portion of the front link, wherein the long link and the front link are one of the long link and the front link. The long link is set to a shape such that the pin is always in contact with one end of the long hole when the long link can be seated. It is a storage sheet characterized by being performed.

With the provision of the long link, the long link and the front link are further provided with a pin in one of the long link and the front link, and a long hole in which the pin is fitted in the other. In the state where the long link can be seated, the pin is set in such a shape that the pin is always in contact with one end of the long hole. Even when a load is applied, the front link is less likely to buckle, and rotation about the lower fulcrum of the front link is also prohibited.
It satisfies the static strength requirements of SOFIX, does not require any increase in the rigidity of the front link and the frame of the seat cushion, and does not significantly increase the weight of the seat.

According to a third aspect of the present invention, there is provided a seat cushion and a seat back provided at a rear portion of the seat cushion. A child seat corresponding to ISOFIX can be mounted on the seat back. A reclining mechanism that allows the seat back to be tilted, and a lower end portion that is rotatable toward the floor side, in a storage seat where the seat cushion also sinks in a forward and downward direction and the seat back is superimposed on the seat cushion and is in a stored state. The attached front link, the front end is rotatably attached to the upper end side of the front link, and when the seat back tilts, the rear end is rotatable with the seat back so that the front link also tilts in the same direction. With the cushion frame attached and one end part facing the seat back A long link rotatably mounted, the other end of which is rotatably mounted at an intermediate portion of the front link, wherein the long link and the seat back side are either the long link or the seat back side. One of them is provided with a pin, and the other is provided with a long hole into which the pin fits, and the long link has a shape such that the pin is always in contact with one end of the long hole when seated. This is a storage sheet characterized by being set to.

Since the long link is provided, the long link and the seat back side have a length in which a pin is provided on one of the long link and the seat back side and the other is fitted with the pin. With a hole provided, the long link is in a seatable state,
Since the pin is set in such a shape that it always comes into contact with one end of the long hole, the front link is less likely to buckle even when a child seat compliant with ISOFIX is mounted and a forward load is applied. In addition, since rotation around the lower fulcrum of the front link is also prohibited, the static strength requirements of ISOFIX are satisfied, and it is not necessary to increase the rigidity of the front link and the frame of the seat cushion, and the weight of the seat is reduced. It does not increase significantly.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of the storage sheet according to the embodiment, and FIG.

As shown in these figures, a seat truck 100 is disposed on a floor. The seat track 100 includes a lower rail 12 fixedly mounted on a floor using a front bracket 110 and a rear bracket 111.
0 and an upper rail 130 movably engaged with the lower rail 120.

On the upper rail 130, first and second brackets 133 and 135 are provided. The seat back, that is, the seat back 300 is provided on the second bracket 135 via the reclining mechanism 200, and the seat back 300 can be tilted by operating the reclining mechanism 200.

The reclining mechanism 200 of this embodiment includes two arms rotatably provided with respect to the hinge pin 210, that is, an upper arm 220 attached to the seat back 300 and a second bracket 135. It has a lower arm (not shown) attached to the side and prohibits / permits the relative movement between the upper arm 220 and the lower arm by a lock mechanism (not shown), thereby prohibiting / permitting the tilting of the seat back 300.

The state shown in FIG. 1 shows a state where the seat back 300 is tilted forward in a state where the seat back can be seated, and the state shown in FIG. Seat back 300
A bar 411 having a rear end side of a cushion frame 410, which is a main frame of the seat cushion 400, which is a seat surface of the seat, bridged to both sides of the seat back 300.
It is rotatably mounted on.

An anchor 413 for attaching a child seat compatible with ISOFIX is fixed to the bar 411. A bracket 420 is provided on the front end side of the cushion frame 410, and the upper end side of the front link 430 is rotatably attached to the bracket 420 by using a pin 431.

The lower end of the front link 430 is rotatably attached to the front end of the first bracket 133 by using a pin 433. Therefore, the first bracket 1
33, the second bracket 135, and the front link 430
, Cushion frame 410, seat back 300
Thus, a four-bar rotation mechanism is formed.

Further, one end is on the seat back side, and in this embodiment, a long link 450 is attached to the upper arm 220 of the reclining mechanism 200 by using a pin 451.
Is rotatably mounted.

A long hole 453 is formed at the other end of the long link 450, and a pin 455 provided on the front link 430 is fitted into the long hole 453. The shape of the long link 450 is set such that the pin 455 of the front link 430 is always in contact with one end of the long hole 453 when the storage sheet is used, as shown in FIGS. , Functions as stopper means for preventing the front link 430 from falling forward.

Next, the operation of the above configuration will be described. When the seat back 300 is tilted forward by operating the reclining mechanism 200 from a seatable state as shown in FIGS. 1 and 3, the cushion frame 410 moves forward and downward in conjunction with the forward tilt of the seat back 300. 4 and the seat back 300 is superimposed on the seat cushion 400 as shown in FIG.

According to the above configuration, the long link 450 is provided, and the shape of the long link 450 is such that the pin 455 of the front link 430 is elongated when the storage sheet is in use, as shown in FIGS. By being set to a shape that always contacts one end of the 453,
Even if a child seat compatible with ISOFIX is mounted and a forward load is applied, the front link 43
0 is less likely to buckle, and rotation about the pin 433, which is the lower fulcrum of the front link 430, is also prohibited. Therefore, the static strength requirement of ISOFIX is satisfied, and the rigidity of the front link 430 and the cushion frame 410 is reduced. It is not necessary to raise the seat, and the weight of the seat does not increase significantly.

The present invention is not limited to the above embodiment. In the above-described embodiment, the front link 430 and the long link 450 are attached by providing a pin 455 on the front link 430.
A long hole 453 is provided on the 0 side.
An elongated hole may be provided in 30, and a pin that fits into the elongated hole may be provided in long link 450.

Further, in the above configuration, the elongated hole and the pin are provided on the front link 430 side.
It may be provided on the side. That is, in the configuration of FIG. 1, an elongated hole in which the pin 451 is fitted is provided on the upper arm 220 side of the reclining mechanism 200 provided on the seatback 300 side, and this pin is inserted into the elongated hole when the storage seat is used. The shape is such that it always contacts one end.

Further, the slot and the pin are inserted into the seat back 300.
When provided on the side, the pin may be provided on the upper arm of the reclining mechanism 200 and the elongated hole may be provided on the end side of the long link 450 on the seat back side.

Further, in the above-described embodiment, the description has been given of the configuration of the elongated hole and the pin. However, a hook may be used instead of the elongated hole, and a protruding portion or a member formed by cutting and raising a member may be used instead of the pin. It may be a processed dowel.

[0035]

As described above, according to the first aspect of the present invention, the provision of the stopper means for prohibiting the front link from moving forward in the seat-removable state enables the child seat for ISOFIX. Even if a front load is applied, the front link is unlikely to buckle, and rotation around the lower fulcrum of the front link is prohibited, so that the static strength requirements of ISOFIX are satisfied. Therefore, it is not necessary to increase the rigidity of the front link and the frame of the seat cushion, and the weight of the seat does not increase significantly.

According to the second aspect of the present invention, since the long link is provided, the long link and the front link are further provided with a pin on one of the long link and the front link and on the other. The fixing device is provided with a long hole in which the pin is fitted, and the long link is set in such a shape that the pin is always in contact with one end of the long hole when the seat can be seated. The front link is less likely to buckle and the rotation around the lower fulcrum of the front link is prohibited even when a corresponding child seat is attached and a load in the forward direction is applied, so the static strength requirements of ISOFIX are satisfied. Also, it is not necessary to increase the rigidity of the front link and the frame of the seat cushion, which significantly increases the weight of the seat. Also no longer be pressurized.

According to the third aspect of the present invention, since the long link is provided, the long link and the seat back side are further provided with a pin on one of the long link and the seat back side. The other end is provided with an elongated hole into which the pin is fitted, and the long link is set to a shape such that the pin is always in contact with one end of the elongated hole when seated. Accordingly, even when a child seat conforming to ISOFIX is mounted and a forward load is applied, the front link is less likely to buckle, and rotation about the lower fulcrum of the front link is also prohibited, so the static strength of ISOFIX It satisfies the requirements, and it is not necessary to increase the rigidity of the front link and the frame of the seat cushion. Increase also eliminated that.

[Brief description of the drawings]

FIG. 1 is a side view of a storage sheet according to an embodiment.

FIG. 2 is a sectional view taken along a section line AA in FIG. 1;

FIG. 3 is a diagram showing a rearwardly inclined state of the seat back in a use state in the storage seat of FIG.

FIG. 4 is a diagram showing a storage state of the storage sheet of FIG. 1;

FIG. 5 is a diagram showing an example of a conventional storage sheet.

FIG. 6 is a diagram showing a storage state of the storage sheet of FIG. 5;

FIG. 7 is a diagram illustrating attachment of an ISOFIX compliant child seat to the seat.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 seat track 200 reclining mechanism 300 seat back 410 cushion frame 430 front link 450 long link 453 long hole 455 pin

Claims (3)

[Claims] An ISOF comprising a seat cushion and a seat back provided at a rear portion of the seat cushion.
The child seat corresponding to the IX can be mounted, and in conjunction with the forward tilt of the seat back, the seat cushion sinks forward and downward, and the seat back is superimposed on the seat cushion to be in a stored state. A reclining mechanism capable of tilting the seat back; a front link having a lower end rotatably mounted on the floor side; a front end rotatably mounted on the upper end of the front link; and when the seat back tilts, A cushion frame having a rear end rotatably attached to the seat back such that the front link also tilts in the same direction; and stopper means for prohibiting movement of the front link in a forward falling direction in a seated state; A storage sheet comprising: 2. An ISOF comprising a seat cushion and a seat back provided at a rear portion of the seat cushion.
The child seat corresponding to the IX can be mounted, and in conjunction with the forward tilt of the seat back, the seat cushion sinks forward and downward, and the seat back is superimposed on the seat cushion to be in a stored state. A reclining mechanism capable of tilting the seat back; a front link having a lower end rotatably mounted on the floor side; a front end rotatably mounted on the upper end of the front link; and when the seat back tilts, A cushion frame having a rear end rotatably attached to the seat back so that the front link also tilts in the same direction; one end rotatably attached to the seat back side; A long link rotatably attached to an intermediate portion; The glink and the front link are provided with a pin provided on one of the long link and the front link, and a long hole provided with the pin on the other, and the long link is in a seatable state. The storage sheet is characterized in that the shape is such that the pin always contacts one end of the slot. 3. An ISOF comprising a seat cushion and a seat back provided at a rear portion of the seat cushion.
The child seat corresponding to the IX can be mounted, and in conjunction with the forward tilt of the seat back, the seat cushion sinks forward and downward, and the seat back is superimposed on the seat cushion to be in a stored state. A reclining mechanism capable of tilting the seat back; a front link having a lower end rotatably mounted on the floor side; a front end rotatably mounted on the upper end of the front link; and when the seat back tilts, A cushion frame having a rear end rotatably attached to the seat back so that the front link also tilts in the same direction; one end rotatably attached to the seat back side; A long link rotatably attached to an intermediate portion; The grink and the seat back side are provided with a pin provided on one of the long link and the seat back side, and a long hole for fitting the pin on the other, and the long link can be seated. In a state, the pin is set in such a shape that the pin always contacts one end of the slot.