JPH0332451Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a flip-up seat used as an assistant seat in automobiles, etc., and is particularly designed to have increased strength against loads applied by seat belts.

BACKGROUND TECHNOLOGY AND PROBLEMS Conventionally, there have been various so-called flip-up seats, such as assistant seats in trucks, etc., in which the rear part of the seat cushion can be flipped up and the entire seat can be folded forward and stored when not needed. It has been implemented.

Figures 1 to 3 show an example of this flip-up seat with a frame structure. In the figures, 1 indicates the seat as a whole, and this seat 1 has a back frame 3 at the rear end of a cushion frame 2. The cushion frame 2 is supported on the floor surface 6 by leg frames 4 and 5, which are integrally connected and extend downward in pairs from the front and rear sides of both sides of the cushion frame 2.

The lower end of the front leg frame 4 is on the floor 6.
The seat 1 is pivoted by a shaft pin 8 to a bracket 7 fixed to the side, so that the seat 1 is made such that the rear part of the cushion frame 2 jumps up and tilts forward about the shaft pin 8. There is. A support pipe 9 is fixed horizontally between the rear ends of both sides of the cushion frame 2, that is, between the connecting portion of the cushion frame 2 and the back frame 3, and is fixed to a substantially central portion of the support pipe 9 as will be described later. A locking device is installed. Further, a back frame pipe 10 for pad receiving and trim is horizontally fixed between both sides of the back frame 3. Reference numeral 13 denotes an operating rod, which is attached to the support frame 2 attached to the support pipe 9.
It is rotatably attached to 0.

Reference numeral 11 denotes a locking device, which consists of a bracket 12 (see FIG. 4) fixed to the support pipe 9 and a locking piece 14, with a part of the locking piece 14 being inserted into the bracket 12 through its through hole 12a. When inserted,
It is fixed to an operating rod 13 which is rotatably passed through the bracket 12. 12b is a through hole for the operating rod 13.

A spring 21 is wound around the operating rod 13 within the bracket 12, thereby constantly biasing the locking piece 14 counterclockwise in FIG. Therefore, one end 12c of the through hole 12a forms a rotation stopper for the locking piece 14.

Further, a striker 15 is fixed to the floor surface 6 in correspondence with this locking device 11, and the engaging portion 14 of the locking piece 14 of the locking device 11 of this striker 15
By engaging a, the seat 1 is locked and fixed so that it cannot be flipped up. When lifting up the seat 1 from this state, the locking piece 14 and the striker 15 are rotated by rotating the operating levers 13a attached to both ends of the operating rod 13.
It is only necessary to release the engagement (as shown by the dotted line in FIG. 3).
In this state, the locking piece 14 is attached to one end 12c of the through hole 12a.
The rotation is stopped when it collides with the

And the flip-up seat 1 configured in this way
A seat belt 16 is attached to the seat belt 16. That is, one end of the seat belt 16 is attached to the bolt 1 to the bracket 12 of the locking device 11 via the attachment piece 17.
The seat belt 16 is fixed to the seat belt 16, and the other end thereof is fixed to the vehicle body wall (not shown).

However, in the seat 1 having such a configuration, when the seat belt 16 is fastened, the seat belt 1
6, when a large load F is applied to the front, this load F
As a result, the bracket 12 to which one end of the seat belt 16 is fixed is twisted and rotated together with the support pipe 9 to which it is fixed, in the tension direction of the seat belt 16, as shown by the two-dot chain line in FIG. Along with this, the locking piece 14 is also pushed by the one end 12c of the through hole 12a and rotates together with the bracket 12, so that the engagement between the locking piece 14 and the striker 15 is released, and the cushion frame 2 is unexpectedly disengaged. There was a risk that the rear end would jump up.

Purpose of the invention The present invention has been developed in view of the above, and has improved the conventional bracket so that even when a large load is applied to the seatbelt, the cushion frame is unlatched from the floor side, and the cushion frame can be unlatched unexpectedly. This provides a seat that does not jump up.

Summary of the invention The present invention has a support pipe installed horizontally at the rear of a cushion frame which is pivotally connected to the floor so as to be tiltable forward, and a striker provided on the floor is removably engaged with the support pipe. In a flip-up seat equipped with a locking device for attaching one end of a seat belt, the locking device includes a bracket fixed to a support pipe, an operating rod rotatably penetrated through the bracket, and a locking device attached to the bracket. It has a locking piece that is fixed to the operating rod in a state where a portion thereof is inserted and is engaged with the striker, and the locking piece is rotated integrally with the operating rod in the direction of engagement with the striker by a biasing member. The bracket has an open groove continuous to the insertion portion of the locking piece in the rotational biasing direction of the locking piece, and the operating rod is locked between the support frame that supports the operating rod. By providing a stopper that prevents the piece from rotating more than a predetermined amount in the direction of rotational deflection, the locking piece can be pushed by the bracket even when a large load F is applied to the seat belt and the bracket is twisted and rotated. The engagement state with the striker is maintained without any movement, and the locking piece maintains an engagement state with the striker without being unnecessarily biased even when it is separated from the striker when the cushion frame is flipped up. It was designed so that it would be maintained.

Embodiment An example of a flip-up seat according to the present invention will be described with reference to FIG. 5 and subsequent figures. Parts corresponding to those in FIGS. 1 to 4 are designated by the same reference numerals, and the explanation thereof will be omitted.

That is, the bracket 12 in the present invention is the fifth bracket.
As is clear from the drawings and FIG. 6, an open groove 22 is formed in the bracket 12 in the direction of rotation and displacement of the locking piece 14. In the illustrated example, through hole 1
This is a case where a groove communicating with 2a is formed.

Furthermore, the lower side of the support frame 20 is extended and bent (see FIGS. 7 and 8), and a plate 24 is fixed to the operating rod 13 by welding or the like in correspondence with this bent portion 23. , the locking piece 14 shown in FIG.
When the plate 24 is engaged with the striker 15, the plate 24 faces the tip of the bent portion 23 with a slight distance therebetween.

According to such a configuration, when the operating rod 13 is rotated clockwise in FIG. 5, the engagement of the locking piece 14 with the striker 15 is released;
The seat 1 can be tilted forward. At this time, if you release your hand from the operating rod 13, the operating rod 13 will rotate counterclockwise due to the elasticity of the spring 21.
5, the operating rod 13, in other words, the locking piece 14 does not rotate counterclockwise more than in the state shown in FIG. 5. Therefore, the bent portion 23 serves as a stopper, similar to the one end 12c of the through hole 12a described in FIG. 3.

Further, when the seat 1 is returned to the normal use state from the forward tilted state described above, the locking piece 14 is automatically engaged with the striker 15 to fix the seat 1.

In this fixed state, the seat belt 16 is attached to the seat belt 16 in this fixed state.
6, a large load is applied in the direction shown in Fig. 5F,
Bracket 1 as shown by the dashed line in Fig. 3
Even if 2 is twisted, this bracket 1
2 is formed with an opening groove 22, that is, an escape groove as shown in FIG. 6, so that when the above-mentioned twist occurs as explained in FIG. do not have. That is, it is possible to avoid the possibility of separating the locking piece 14 from the striker 15,
The seat 1 can always be held in its fixed state.

FIG. 9 shows another embodiment of the bracket 12, in which the upper half of the bracket 12 is moved almost in the direction of the load in order to reduce the torsional torque acting on the support pipe 9 when a large load from the seat belt 16 is applied. This is a case where the vertical distance from the center of the support pipe 9 to the load line f is shortened by bending.

Effects of the invention According to the invention explained above, the seat belt 1
Even if a large load is applied to 6, the locking piece 1
4 is never separated from the striker 15, the seat belt 1 can be used in a stable state at all times.

[Brief explanation of the drawing]

Fig. 1 is a side view of a conventional flip-up seat with some parts omitted, Fig. 2 is a perspective view thereof, Fig. 3 is a vertical sectional view of the main parts, Fig. 4 is a perspective view of its bracket, and Fig. 4 is a perspective view of the same. Fig. 5 is a vertical sectional view similar to Fig. 3 showing an example of the flip-up seat according to the present invention, Fig. 6 is a perspective view of its bracket, Fig. 7 is a partial perspective view, and Fig. 8 is its sectional view. , FIG. 9 is a partial sectional view showing another embodiment. 1 is a seat, 9 is a support pipe, 11 is a locking device, 12 is a bracket, 13 is an operating rod, 14
1 is a locking piece, 15 is a striker, 20 is a support frame, 2
2 is an open groove.

Claims (1)

[Claims for Utility Model Registration] A support pipe suspended horizontally at the rear of a cushion frame which is pivotally connected to the floor so that it can tilt forward,
In the flip-up seat, which is detachably engaged with the striker provided on the floor surface and is attached with a locking device for attaching one end of the seat belt, the locking device being a bracket fixed to the support pipe. an operating rod that is rotatably penetrated through the bracket; and a locking piece that is fixed to the operating rod with a portion inserted into the bracket and engaged with the striker; The locking piece is rotationally biased integrally with the operating rod in the direction of engagement with the striker by a biasing member, and the bracket has a rotationally biased portion connected to the insertion portion of the locking piece. an open groove is formed in the direction, and the operating rod is provided with a stopper for preventing the locking piece from rotating more than a predetermined amount in the rotation bias direction between the operating rod and a support frame that supports the operating rod. A flip-up seat with a unique feature.