JPH0546976Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a forward-folding seat provided in an automobile or the like.

[Conventional technology]

For seats installed in small trucks or van-type automobiles, etc., the seat bag is folded forward so as to overlap the upper surface of the seat cushion, and the back of the seat bag in this reclined state is used as a storage space for luggage. Various so-called forward-folding seats have been proposed.

The structure of this conventional forward-folding seat will be explained with reference to FIG. 5. 1 is a seat cushion fixed to the floor surface F of the vehicle body, 2 is a seat back, and this seat back 2 has a hinge projecting from its lower end. It is connected to the side rear end of the seat cushion 1 via an arm 3 so as to be foldable forward.

Reference numeral 4 denotes a locking member provided at the upper end of the back surface of the seat bag 2. By engaging the locking member 4 with an engaging portion 5 provided on the vehicle body wall surface W, the seat bag 2 is held in an upright state. It is done as it is done.

By disengaging the locking member 4 from the engaging portion 5 and pressing the seat bag 2 forward, the seat bag 2 falls forward so as to overlap the upper surface of the seat cushion 1, thereby causing the back surface of the seat bag 2 to is designated as the luggage storage section A.

[The problem that the idea attempts to solve]

However, this conventional forward-folding seat has the following problems in its forward-folding operation.
That is, since the seat cushion 1 is normally formed in such a shape that its side portions bulge out, the interference between the side portions of the seat cushion 1 and the hinge arm 3 causes the seat back 2 to become as shown in FIG. 5B. Even if the seat cushion 1 is tilted forward by only a small angle, and the bulges on both sides of the seat cushion 1 are retracted to form parallel parts to eliminate interference with the hinge arm 3, the seat cushion 1 will not tilt forward at the top surface. The front end of the seat cushion 1 has a shape that is highly inclined toward the front, and there is a large difference between the height of the front end of the seat cushion 1 and the height of the center of rotation of the seat back 2, that is, the height of the hinge. As such, the seat bag 2 does not completely overlap the seat cushion 1 and is inclined, making it difficult to effectively utilize the back surface of the seat bag 2 as a storage space for luggage.

The present invention was devised in view of this point, and has a simple structure that allows the seat bag to fall forward so that its back surface is approximately horizontal with respect to the seat cushion.
The purpose is to provide a forward-folding seat that can secure a good luggage storage space.

[Means to solve the problem]

That is, the forward-folding seat of the present invention includes a base plate fixed to the seat cushion, a rotating plate fixed to the seat back, a connecting member rotatably hinged to the base plate and the rotating plate, and the base plate. cam means provided in the rotating plate, an engaging recess provided in the rotating plate, and an engaging pin that engages with the engaging recess to fix the rotating plate and the connecting member in an unrotatable state; An operating member that moves so that an engagement pin is removed from an engagement recess by a cam means when the member rotates forward about a hinge portion on the base plate side, thereby enabling the seat back to completely fall forward. It consists of the following.

[Effect]

By providing the hinges of the connecting member at two points, one on the seat cushion side and the other on the seat back side, when the seat back is folded forward, the hinges are located above the top surface of the seat cushion, and the seat back is tilted high toward the front end. By reducing the difference between the front end of the seat cushion and the seat cushion, the back section is stacked on top of the seat cushion in a nearly horizontal state, making it possible to effectively utilize the back section of the seat back as a storage space for luggage. .

When the seat bag is folded forward, the connecting member first rotates forward about the hinge portion on the seat cushion side, and then the seat bag is moved forward with respect to the connecting member. Moreover, in this operation, the engagement pin is disengaged from the engagement recess by the cam means that causes the seatback to be folded forward, and the fixed state of the seatback to the connecting member is automatically released, so that the seatback can be folded forward smoothly. It is done continuously.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 4.

In FIG. 1, reference numeral 11 denotes a seat cushion whose upper surface is highly inclined toward the front end, and is fixed to the floor surface F of the vehicle body. 12 is a seat bag, and this seat bag 12 is connected to the seat cushion 1 by a connecting member 13.
1 so as to be able to fall forward so as to overlap the upper surface thereof.

This connecting member 13 has an upper and lower two-point hinge, that is, a first hinge a on the seat cushion 11 side,
A second hinge b is provided on the seat back 12 side, and the height _h1 of the upper second hinge b is set to be approximately the same as the height _h2 of the front end of the seat cushion 11. ing.

The forward tilting motion of the seat bag 12 relative to the seat cushion 11 is performed by rotation of the connecting member 13 about the upper and lower two-point hinges a and b, respectively. That is, the seat bag 12 is first
As shown in FIG. 2, the connecting member 13 rotates integrally with the connecting member 13 forward at a required angle (an angle slightly tilted forward from a substantially vertical position) about the first hinge a of the connecting member 13, and becomes in a primary forward tilting state. Then the second hinge b
It becomes a secondary forward tilting state in which it rotates with respect to the connecting member 13 around , and is largely tilted forward. This secondary forward tilting rotation is performed around the second hinge b located above the upper surface of the seat cushion 11, so that the upper surface of the seat cushion 11 is rotated as shown in FIG. 1C. The front parts are tilted forward so that they overlap over the entire surface, and the second hinge b, which is the center of rotation in this state, is approximately the same height as the front end of the seat cushion 11, so the back part is in a substantially horizontal state. The baggage rest area A is formed.

As described above, in this example, the forward-folding movement of the seat back 12 includes a primary forward-folding rotation in which the seat bag 12 is slightly rotated forward about the first hinge a, and a forward-folding rotation that is slightly rotated forward about the first hinge a, and
It is performed by two movements: a full forward rotation around , and a secondary forward rotation, and in this movement,
The connecting member 13 for providing a structure in which the primary forward tilting rotation is always performed as a pre-stage operation will be described with reference to FIGS. 2 to 4.

A base plate 14 is fixed to the rear end of the side portion of the seat cushion 11 with bolts 14a.
On the other hand, a rotating plate 15 is fixed to the lower end of the side of the seat bag 12 by bolts 15a. A shaft 16 is fixed approximately at the center of the base plate 14 by penetrating both its inner and outer surfaces.
The connecting link 17 is located inside the base plate 14 and has a shaft hole 17a bored at its lower end.
It is pivotably mounted to be rotatable in the front-rear direction.
Further, a shaft 18 is provided on the upper end of the connecting link 17 to project outward, and a rotation plate 15 is attached to the shaft 18, and a shaft hole 1 is bored in the lower part of the shaft 18.
5a, the seat cushion 11 and the seat back 12 are connected to each other by a connecting link 17.
7 to the seat cushion 11, that is, the shaft 16 between the base plate 14 and the connecting link 17.
The pivot point is the first hinge a, the seat back 1
2, that is, the pivot point between the rotating plate 15 and the connecting link 17 by the shaft 18 is the second hinge b.

In this example, as described above, the height position h ₁ of the second hinge b is equal to the height h ₂ of the front end of the seat cushion 11.
The length of the connecting link 17 is set to be approximately equal to .

An operating link 19 is disposed on the outside of the base plate 14 and the rotating plate 15 in correspondence with the connecting link 17. This working link 1
9 has elongated holes 20a and 20b that are long in the longitudinal direction at both ends, and these elongated holes 20a and 20b are engaged with the shaft 16 of the base plate 14 and the shaft 18 of the connecting link 17, respectively. Therefore, the operating link 19 is supported by the connecting link 17 so as to be movable along its longitudinal direction.

Further, an actuating pin 21 is fixed approximately at the center of the actuating link 19 so as to pass through both the inner and outer surfaces of the actuating link 19, and the inwardly protruding portion of the actuating pin 21 is bored into the base plate 14 via a roller 21a. It is engaged with the cam hole 22. This cam hole 22
has an upper edge extending from the rear end toward the front end with respect to the arc C centered on the first hinge a.
The roller 21a of the actuating pin 21 is in rolling contact with the upper edge of the cam hole 22.

Further, the actuation link 19 is provided with an engagement pin 23 located above the actuation pin 20 and protruding inward, and correspondingly, the lower edge of the rotation plate 15 is provided with an engagement pin 23 as will be described later. An engagement recess 24 with which the engagement pin 23 is engaged when the seat bag 12 is in the upright position, and a stopper piece 25 that abuts the engagement pin 23 when the seat bag 12 is fully tilted forward are formed.

Further, on the outside of the operating link 19, a tension coil spring 26 is stretched between the operating pin 20 and the shaft 18, and the biasing force of the tension coil spring 26 causes the operating link 19 to always move upward and upward. That is, the engagement pin 23 is biased in the direction in which it is engaged with the engagement recess 24 of the rotating plate 15.

Note that the connecting members 13 configured as described above are provided symmetrically on both sides of the seat,
If there are restrictions on weight, space, etc., the connecting member 13 having the above-described configuration may be arranged only on one side, and the base plate 14 and rotating plate 15 may be connected only by a connecting link 17 on the other side. Good too.

Further, 27 is a lock member provided at the upper end of the back surface of the seat bag 12, and this lock member 27
consists of a hook-like member that rotates in the vertical direction.On the other hand, an engaging part 28 is provided on the vehicle body wall surface W side corresponding to this locking member 27, and the locking member 27 is engaged with this engaging part 28. By being fitted together, the seat bag 12 is fixedly held in an upright position.

Next, the operation of the forward-folding seat of this example including the connecting member 13 configured as described above will be described.

In a normal state, the seat back 12 is held upright against the vehicle body wall W by the locking member 27, so that the seat bag 12 can be sat on as a normal seat. In this state, the operating pin 21 of the operating link 19 corresponds to the rearmost end of the cam hole 22 of the base plate 14, and the engaging pin 23 corresponds to the rearmost end of the cam hole 22 of the base plate 14.
As a result, the rotating plate 15, that is, the seat back 12 and the connecting link 17 are fixed in a non-rotatable state (see FIG. 2A).

In this state, when the lock member 27 is removed from the engaging portion 28 and the seat bag 12 is pressed forward, that is, in the inverted direction, the connecting link 17 is integrally connected to the seat bag 12, and the operation that is engaged and supported by the connecting link 17 is activated. The link 19 is rotated forward about the axis 16 of the base plate 14, which is the first hinge a, and the seat back 12 is thereby tilted forward to a predetermined angle (primary forward tilt state, see FIG. 2B). .

In this primary forward tilting motion, the operating link 19
The actuating pin 21 is moved from the rear end of the cam hole 22 to the front end as the cam hole 22 rotates.
The actuating link 19 is thus moved downwardly against the biasing force of the tension coil spring 26. As a result, the engaging pin 23 is disengaged from the engaging recess 24 of the rotating plate 15, so that the rotating plate 15, ie, the seat back 12, becomes rotatable relative to the connecting link 17.

In this state, by further pressing the seat back 12 in the inverted direction, the rotating plate 15
is largely rotated forward with respect to the connecting link 17 around the axis 18 of the connecting link 17, which is the second hinge b, and as a result, the seat back 12 is fully rotated on its upper surface with respect to the seat cushion 11 as described above. The seat bag 12 is folded forward so as to be overlapped, and the back side of the seat bag 12 forms the luggage storage area A (secondary forward folding state where the seat bag 12 is fully folded forward).
(See Figure C).

In this fully forward tilted state, the second hinge b is located above the upper surface of the seat back 12, and in particular, in this example, the height _h1 of the second hinge b and the height of the front end of the seat cushion 11 are h ₂ , the seat bag 12 is stacked on the seat cushion 11 so that its back surface is approximately horizontal, and in this fully tilted forward state, the stopper piece 25 of the rotating plate 15 is The seat back 12 is held in contact with the engagement pin 23, and the seat back 12 is securely held in that position, so even if a heavy load is placed on the load resting section A, the seat back 12 will not tilt. Therefore, the cargo storage section A is always held in a horizontal state.

As described above, in the forward-folding seat of this example, when the seat bag 12 is in the forward-folding state, its back surface, that is, the cargo placement area A, is in a substantially horizontal state, so that cargo can be placed on this cargo placement area A without any hindrance. can be stably loaded, and can be used as cargo space better than conventional seats that fold forward.

Further, in this example, when the seat bag 12 is folded forward, the connecting member 13 first rotates forward about the first hinge a, integrally with the seat bag 12, and then the seat bag 1 is rotated forward with respect to the connecting member 13.
2 is operated so as to be inverted about the second hinge b, so that the seat bag 12 can be folded forward smoothly. In other words, the seat bag 12 is folded forward in the opposite manner, that is, the seat bag 12 is first folded down with respect to the connecting member 13 around the second hinge b, and then the connecting member 13 is rotated forward around the first hinge a. In the case where the seat bag 12 is overlapped with the seat cushion 11, the seat bag 1 is
However, in this example, there is no such problem, and the seat bag 12 and seat cushion can be moved by simply pressing the seat bag 12 forward. Since the sections 11 are stacked in substantially accurate vertical correspondence, it is possible to advance the loading with good operability.

[Effect of idea]

As described above, in the forward-folding seat of the present invention, the connecting member that connects the seat cushion and the seat bag has hinges on the seat cushion side and the seat bag side, respectively, so that when the seat bag is in the forward-folding state, the hinges are fixed to the seat cushion. Since the seat bag is located above the top surface of the seat cushion, the back surface of the seat bag can be stacked on top of the seat cushion so that its back surface is approximately horizontal, allowing the back surface of the seat back to be effectively used as a storage space for luggage. It is.

When the seat bag is folded forward, the connecting member first rotates forward around the hinge portion on the seat cushion side together with the seat bag, and then the seat bag is moved forward with respect to the connecting member. In this operation, the engagement pin is disengaged from the engagement recess by the cam means that causes the seat back to move forward, and the fixed state of the seat back to the connecting member is automatically released, so that the seat back is moved forward. Operations can be performed smoothly and continuously.

[Brief explanation of the drawing]

FIGS. 1A to 1C are side views schematically showing the forward-folding seat of the present invention, FIGS. 2A to C are side views of an example of a connecting member applied to the forward-folding seat of the present invention, and FIG. 4 is an exploded perspective view of the connecting member, and FIGS. 5A to 5C are explanatory views of a conventional forward-folding seat. In the figure, 11 is a seat cushion, 12 is a seat bag, 13 is a connecting member, 17 is a connecting link, 1
9 is an operating link, a is a first hinge, and b is a second hinge.

Claims (1)

[Claims for Utility Model Registration] A base plate fixed to the seat cushion, a rotating plate fixed to the seat back, a connecting member rotatably hinged to the base plate and the rotating plate, and the base plate cam means provided in the rotating plate; an engaging recess provided in the rotating plate; and an engaging pin that engages with the engaging recess and fixes the rotating plate and the connecting member in an unrotatable state; When the connecting member rotates forward about the hinge portion on the base plate side, the engaging pin is moved by the cam means to be removed from the engaging recess, and the seat back is completely closed. A forward-folding seat comprising: an actuating member capable of folding forward;