JPH0532348Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Effects of the Invention) (Industrial Field of Application) The present invention relates to a folding seat for a vehicle that is mainly installed and used as a third seat in the interior of a wagon type vehicle, van type vehicle, or the like.

(Prior art) Conventionally, this type of folding seat for vehicles was developed in Japanese Unexamined Patent Application Publication No. 61
As shown in Publication No. 81829, it is installed and used as a third seat further behind the second seat behind the driver's seat (front seat) in the interior of a wagon or van type vehicle.

This folding seat has separate left and right seats, each with a seat back attached to the top of the seat cushion so that it can be folded forward, and one side of the back of the seat cushion that supports the seat cushion so that it can stand up, fall over, and slide forward and backward. A first leg body is provided on the other side of the back surface of the seat cushion, and a second leg body is provided on the other side of the back surface of the seat cushion to support the seat cushion in an overturned state in which the seat cushion can be seated. A locking means is provided to restrict forward and backward sliding in the case of a falling state.

Here, the first leg body that supports the seat cushion so that it can stand up, fall over, and slide back and forth includes a lower rail that is long in the front and back direction fixed to the vehicle body side, and an upper rail that is slidably fitted into the lower rail so as to be movable back and forth. and a leg pipe which is mounted and fixed on the upper rail and pivotally supports the seat cushion so that it can be raised and fallen. As a locking means for regulating the back and forth sliding, a locking hole is formed in the lower rail, and an L-shaped locking lever is rotatably pivoted to the upper rail.
A locking spring that always rotates and biases the locking lever in the direction of fitting the locking lever into the locking hole, and a locking spring that moves together with the seat cushion when the seat cushion rotates from a fallen state to an upright state, and turns the locking lever into a locking spring. The lock release pin is provided with a lock release pin that is pressed and rotated in a direction to separate from the lock hole.

(Problem to be Solved by the Invention) By the way, in the folding vehicle seat configured as described above, the locking means that restricts the front and rear sliding of the seat cushion automatically locks in conjunction with the upright and overturning operations of the seat cushion. However, the locking lever of the locking means is only energized by the lock spring and inserted into the lock hole of the lower rail only when the seat cushion is in the upright position, and the seat cushion is in the upright position. This causes the lock lever to be pushed by the lock release pin and disengage from the lock hole, leaving the lock lever unlocked. For this reason, although there may be no problem when the seat cushion is tipped over and the passenger is seated, when the seat cushion is folded forward and the seat cushion is erected to accommodate a large amount of luggage, it is difficult to prevent the seat cushion from sliding back and forth. First, the folded seat cushion and seat back, along with the upper rail, move back and forth as the vehicle travels, producing abnormal noises such as clunking impact noises, causing extreme discomfort and anxiety to the driver, etc. There are problems such as the risk of damage due to collision with luggage.

Therefore, in order to suppress back and forth movement of the seat cushion in the folded and upright state, a fixing band must be provided, or the lock bar of the locking means must be unlocked using a manual lever, which makes the operation cumbersome. I had a problem that turned out to be.

The present invention was developed in view of the above circumstances, and by improving the legs that support one side of the back surface of the seat cushion so that it can stand up and fall down as well as slide back and forth, the present invention has a very simple structure, but it also allows the seat cushion to stand up and fall down easily. In conjunction with the operation, it automatically becomes unlocked during the process, and automatically becomes locked both when the seat cushion is inverted and when the seat cushion is upright.
To provide a highly practical folding seat for a vehicle, which can be positioned by regulating front and rear sliding, and eliminates concerns about front and rear movement, generation of abnormal noise, and damage caused by collision with luggage as the vehicle runs.

(Structure of the invention) (Means for solving the problem) In order to achieve the above-mentioned object, the vehicle seat of the invention has a seat cushion on one side of the back surface of the seat cushion that can stand up, fall over, and slide back and forth. The supporting legs are connected to a fixed lower rail that is long in the front and back and has a plurality of places spaced apart in the front-rear direction on one side and recessed steps for slide locks on the other side, and an upper rail that is slidably fitted into the upper rail; a rotating shaft that is rotatably attached to the upper rail via a bracket along the front-rear direction and supports the seat cushion so as to be able to stand up and fall; and claw portions at both ends. It is attached perpendicularly to the rotating shaft and rotates back and forth with the shaft when the seat cushion is raised or turned over, and when the seat cushion is turned over, the claw at the one end engages one side of the lower rail. When the seat cushion is engaged with one of the plurality of recessed steps and the seat cushion is in the upright state, the claw at the other end engages with the recessed step on the other side of the lower rail, and the seat cushion is moved forward and backward. The seat cushion is configured to be provided with locking claws that perform positioning locking and release the lock by releasing the claws at both ends from the recessed steps on both sides of the lower rail when the seat cushion is in the vicinity of the neutral position during the upright and fall operation. It is characterized by

(Function) With the above configuration, when the seat cushion is overturned, the lock pawl rotates in one direction together with the rotating shaft that rotates integrally with the seat cushion, and the pawl at one end of the lock pawl rotates in the recess on one side of the lower rail. When the seat cushion is automatically engaged with the step and becomes locked to restrict forward and backward sliding, and when the seat cushion is raised from this state,
The lock pawl rotates in the opposite direction to that described above together with the rotating shaft that rotates integrally with this, and the pawl portion at the one end is separated from the concave stepped portion on one side of the lower rail.
The claw portion at the other end automatically engages with the recessed step portion at the other end of the lower rail, resulting in a locked state that restricts forward and backward sliding. When the seat cushion is in the process of standing up or falling over, the lock pawl rotates to near the neutral position together with the rotating shaft that rotates integrally with the seat cushion, so that the pawls at both ends engage the recessed steps on both sides of the lower rail. Both of them are released from the lock and automatically become unlocked, allowing the seat cushion to slide back and forth.

(Embodiment) One embodiment of the present invention will now be described with reference to Figs.

First, Figures 2, 3, and 4 show the luggage room at the rear of a wagon or van type vehicle.
1 is a perspective view of a state in which a folding vehicle seat 1 of the present invention is installed as a third seat in a vehicle. Although only one side is shown here, they are actually arranged symmetrically on both the left and right sides. In the figure, 2 indicates a seat cushion, and 3 indicates a seat bag. Fig. 2 shows a seating state in which the seat cushion 2 is turned down approximately horizontally so that the occupant can sit, and the seat back 3 is tilted backwards. Cushion 2
Fig. 4 shows the folded and standing state in which the seat bag is folded forward onto the upper surface and then raised so as to flip outward (toward the window). Fig. 4 shows the seat bag 3 which is horizontally folded forward onto the top surface of the overturned seat cushion 2, and is placed on a cargo platform, table, etc. It shows that it can be used as. Note that FIG. 5 is a vertical cross-sectional view of FIG. 2, and FIG.
The figure shows a longitudinal sectional view of FIG.

To explain in detail the structure of the foldable/expandable seat 1, the seat cushion 2, as shown in FIG. Become. Hinge receivers 2c are erected on the left and right sides of the rear end of the cushion frame 2a, and the lower part of the frame (not shown) of the seat bag 3 is pivotally attached to the hinge receivers 2c via a reclining device or the like, so that the seat bag 3 is placed on the seat cushion 2. They are installed so that they can be tilted forward from a moderately rearwardly inclined upright position as shown in FIG. 2 to a horizontally stacked position as shown in FIG. The seat back 3 has a back length longer than the front and back width of the seat cushion 2, and a thick pad 3a is attached only to the upper part.
As shown in Figures 2 and 4, when the seat cushion 2 is folded forward, the pad 3a is placed in front of it, and the thickness of the entire seat when folded is made as thin as possible to ensure a large cargo space. be. Further, on the back of the seat bag 3, a resin tray 4 is provided with edges 4a on three sides to prevent cargo from sliding off so that it can be used as a cargo platform.

Here, a leg body (hereinafter referred to as a first leg body) 5 is provided on one side of the back surface (vehicle window side) of the seat cushion 2 and supports the seat cushion 2 so that it can stand up, fall over, and slide back and forth. ing. The first leg body 5 has a lower part fixed to a wheel house 6 on the vehicle body side, and as shown in FIGS. an upper rail 8 that is slidably fitted so as to be movable back and forth; a rotating shaft 9 that is rotatably attached to the center of the upper surface of the upper rail 8 along the longitudinal direction and supports the seat cushion 2 so as to be able to stand up and fall; It has a simple structure, consisting of a lock pawl 10 which has pawls 10a and 10b at both ends and is attached perpendicularly to the rotating shaft 9 and rotates together with the shaft 9.

The lower rail 7 has a substantially hat-shaped cross section, and mounting brackets 7a are fixed to the front and rear ends of the lower surface by rivets 7b, respectively, and these front and rear mounting brackets 7a are fixed to the wheel house 6 by bolts or the like. Further, this lower rail 7 has recessed step portions 7c and 7d for slide locks formed by cutouts on both side edges of the upper opening. The recessed steps 7c formed at three locations spaced apart in the front-rear direction on the inside are for positioning the seat back and forth when the seat is seated, and the recessed step 7d formed at one location near the rear on the outside is for folding the seat. It is used for front-back positioning when standing up.

On the other hand, the upper rail 8 is the lower rail 7.
The slide limiter 8a has a roughly lip groove-shaped cross section that slides into the slider so that it can be moved back and forth without play, and a portion of the top plate near the front and rear ends is cut down and abuts against the rivet 7b at the front and rear ends of the lower rail 7.
Further, locking holes 8c and 8d are formed on both sides near the middle of the top plate.

Shaft mounting brackets 11 and 12 are attached to the front and rear portions of the top surface of the upper rail 8 by screws, etc., and are rotatably held by the front and rear brackets 11 and 12, so that the rotating shaft 9 is attached to the upper rail 8. It is attached along the longitudinal direction at the center of the top surface of the top plate. The rotating shaft 9 is shaped like a round bar, and its front and rear ends are each bent into a substantially Z-shape, and the tips of each of the front and rear bent portions are flattened. The flat front and rear ends are the cushion frame 2 of the seat cushion 2.
They are each connected by bolts 13 to brackets 2d with nuts welded and fixed to the front and rear portions of the outer pipe of a, and the rotation shaft 9 rotates together with the seat cushion 2 to support the cushion 2 so that it can stand up and fall down. I'm starting to do that.

The lock pawl 10 is mounted on the intermediate portion of the rotating shaft 9. This lock pawl 10 is made by bending a single strip-shaped steel plate into a mountain shape from the middle, and further bending both ends downward to form pawl portions 10a and 1.
0b, and is welded and fixed so as to protrude in a double-leg shape on both sides in a state perpendicular to the rotating shaft 9, so that it rotates integrally with the rotating shaft 9.

On the other hand, on the other side (the center side of the vehicle body) of the back surface of the seat cushion 2, there is a second leg 14 that horizontally supports the seat cushion 2 together with the first leg 5 in an overturned state where it can be seated. It is provided. As shown in FIG. 7, this second leg body 14 mainly includes a leg bracket 15 having a substantially inverted triangular shape, and the front and rear upper ends of this leg bracket 15 are connected to the inner pipe of the cushion frame 2a of the seat cushion 2. Mounting bracket 2e welded to the bottom
is rotatably connected to via a hinge pin 16. Note that the hinge pin 16 is prevented from coming off by a clip 17. Further, a rod receiver 15a is formed near the upper end of this leg bracket 15, and one end of a tie rod 18 is inserted into this and connected. The other end of this tie rod 18 is attached to the shaft mounting bracket 1 of the first leg 5.
Rod receiver 11 that extends integrally from 1 and curls
a and are connected together to form a substantially parallelogram link together with the cushion frame 2a.

Further, the lower end of the leg bracket 15 of the second leg body 14 is formed in a bifurcated shape so as to straddle a lock bar 19 provided on the vehicle floor, and a hook-shaped hook is provided on the back side of the leg bracket 15 as shown in FIG. Floor lock piece 20 is attached to pin 21 and retaining ring 22
It is rotatably mounted. It should be noted that the floor lock piece 20 is always rotationally biased in the direction of closing by a torsion spring (not shown), and
It is designed so that it can be pulled up with a finger or the like in the direction of opening (unlocking direction) against the spring. Further, three lock bars 19 on the vehicle body floor are arranged in the front-rear direction, as shown in FIGS. 2 to 4, corresponding to the positioning recesses 7c of the first legs 5. The right half of each of the three lock bars 19 is used to lock the floor of the right folding seat (not shown).

Furthermore, the leg bracket 1 of the second leg 14
As shown in FIG. 7, a belt anchor hole 15b to which a nut 23 is welded is formed on the back surface of the belt anchor hole 15b at approximately the middle of the seat belt 5, and an inner belt 24 of the seat belt is connected to this hole by an anchor bolt 25. Note that 26 is a cover. In addition, the inner belt 24 is attached to the tongue plate 27 of the outer belt 27 which is lowered from the cant rail portion of the vehicle when the entire seat 1 is folded and upright (flipped up) as shown in FIG.
a to prevent the seat 1 from falling over.

To describe the function of the above-mentioned folding vehicle seat 1, first, from the folded and upright state shown in FIG.
Inner belt 24 against outer belt 27
Remove seat cushion 2 from seat back 3.
and push it down toward the center of the vehicle. With this, the seat cushion 2 falls down as shown in FIG. 4 via the rotating shaft 9 of the first leg 5, and if the seat back 3 is raised rearward from that state, it will unfold as shown in FIG. 2. As a result, the occupant A can sit in the seat as shown in FIG. 9.

When the seat cushion 2 is overturned, the locking pawl 10 rotates in one direction together with the rotating shaft 9 that rotates integrally with the seat cushion 2 as shown in FIG. The lock hole 8c on one side automatically engages with the recessed step 7c on one side of the lower rail 7. This restricts the front and rear sliding of the upper rail 8 of the first leg 5 with respect to the lower rail 7, so that the entire seat 1 together with the rotary shaft 9 can be held in position without moving back and forth.

Further, as the seat cushion 2 is overturned, the leg bracket 15 of the second leg 14 rotates about the pin 16 via the tie rod 18 and is deployed perpendicularly to the back surface of the seat cushion 2.
With this, the two lower end prongs of the leg bracket 15 correspond to the concave stepped portion 7c of the three lock bars 19 on the vehicle floor where the lock pawl 10 engages.
At the same time, the floor lock piece 20 automatically engages with the lock bar 19 in a hook-like manner. As a result, the second leg 14 stands fixedly on the vehicle floor, and together with the first leg 5 supports the seat cushion 2 in a horizontal state.

In addition, during the overturning operation of the seat cushion 2, the lock pawl 1 is rotated together with the rotation shaft 9.
0 will rotate near the neutral position as shown in FIG. automatically becomes unlocked. In this state, seat cushion 2
By sliding the seat back and forth, the claw 10a at one end of the locking claw 10 can be selectively engaged with one of the three recessed steps 7c in the front, back and middle when the seat is completely tipped over. The position of the shaft 2 in the front and back direction can be adjusted. For example, the 9th
If the vehicle is set to the most advanced position as shown in the figure, it is possible to seat the passenger A and store a considerable amount of luggage B behind him. Further, since the seat belt can be worn while the passenger is in the seated state, it is safe even if the occupant A is a child or the like.

Next, if the seat back 3 is folded forward so as to overlap the upper surface of the seat cushion 2 as shown in FIG. Since it is held horizontally,
As shown in FIG. 10, it is possible to place a large amount of baggage B on top of this, and conveniently store baggage C such as dirty tools and tire chains underneath.

In addition, when the floor lock piece 20 is operated to release the lock in the state shown in FIG. The lock pawl 10 rotates together with the shaft 9 in the opposite direction. In the middle of this process, as shown in FIG. 1b, the locking claws 10a and 10b at both ends of the locking claw 10 become in an unlocked state in which they do not engage with either of the recessed steps 7c and 7d on both sides of the lower rail 7, and the seat is now in the unlocked state. If you slide the cushion 2 backwards and flip it up and rotate it,
As shown in FIG. 1c, the claw portion 1 at the other end of the locking claw 10
0b automatically engages with the recessed step 7d on the other side of the lower rail 7 from the lock hole 8 at the other end of the upper rail 8, and this restricts the front and back sliding of the upper rail 8 with respect to the lower rail 7, and the rotating shaft 9 At the same time, the entire seat 1 in the folded and upright state can be positioned and held without any free movement in the front-rear direction.

In addition, during this folding and standing operation, as shown in FIG. 3, the leg bracket 15 of the second leg 14 is automatically rotated so as to be folded about the pin 16 as a fulcrum via the tie rod 18. It is joined parallel to the back surface of the seat cushion 2 so as not to get in the way.

In addition, when the seat 1 is in the folded and upright state, the inner belt 24 of the seat belt is engaged with the tongue plate 27a of the outer belt 27 lowered from the cant rail part of the vehicle as shown in FIG. It is now possible to prevent

In this state, the entire seat 1 can be stored very compactly on the window side of the vehicle body, and a large amount of luggage can be loaded by making full use of the luggage compartment of the vehicle body.

11 to 13 show another embodiment of the present invention, in which the lock pawl 1 of the first leg 5 is
This is to prevent breakage that would occur if the claw portions 10a, 10b at both ends of the lower rail 7 are forcibly pushed down at positions that do not correspond to the recessed step portions 7c, 7d of the lower rail 7. For convenience of explanation, the same reference numerals will be used for components corresponding to those in the embodiment described above. Here, the rotating shaft 9 is provided with a U-shaped bracket 11 at the center of the upper surface of the top plate of the upper rail 8 so as to be able to rotate integrally with the seat cushion 2 in the longitudinal direction. The lock claw 10 is not directly welded to the rotating shaft 9, but is welded to a cylindrical rotating sleeve 30 that is rotatably fitted onto the rotating shaft 9.
That is, the lock claw 10 is rotatably provided on the rotating shaft 9 via the rotating sleeve 30. The locking pawl 10 has a protruding piece 10c on the upper surface, and an elastic member 31, which is a torsion spring, is provided with a U-shaped folded portion at one end engaged with the protruding piece 10c, and the other end of the elastic member 31 is L-shaped. A bent portion passes through the rotating shaft 9 in a state that is perpendicular to the middle of the rotating shaft 9. The lock pawl 10 now follows the rotation of the rotation shaft 9 via the elastic member 31.

In addition, numeral 33 in FIG. 11 is a spring for automatically flipping up the seat cushion, which is provided at the front and rear portions of the rotary shaft 9.

In the case of this other embodiment, as shown in FIG.
As shown in the figure, when the seat cushion 2 is overturned, the lock pawl 10 is attached to the rotary sleeve 3 via an elastic member 31 on the rotary shaft 9 that rotates together with the seat cushion 2.
0, and the claw portion 10a at one end of the lock claw 10 fits into the lock hole 8c of the upper rail 8 from the recessed step 7c of the lower rail 7, as shown by the solid line, and is automatically locked. This restricts the front and rear sliding of the upper rail 8 with respect to the lower rail 7, and enables the front and back positioning of the seat cushion 2 in an overturned state.

By the way, when the seat cushion 2 is tipped over, the lock hole 8c of the upper rail 8 is locked against any of the three recessed steps 7c of the lower rail 7.
If they do not match and are shifted back and forth, the claw portion 10a of the lock claw 10 will not smoothly enter the recessed step 7c of the lower rail 8, but will hit the upper surface of the lower rail 7 as shown in the imaginary line. Become. In this state, if the seat cushion 2 is further rotated in the direction of overturning and a load is applied, in the previous embodiment, the lock pawl 10 was subject to the load and could break. Regardless of the rotation of the rotation shaft 9, the lock pawl 10 is completely prevented from escaping and breaking due to the elastic deformation of the elastic member 31. Then, if the seat cushion 2 is slid back and forth as it is, the claw portion 10a at one end of the locking claw 10 will fit into the recessed step 7c of the lower rail 7 with which it first met, as shown by the solid line, and the same locking state as described above will be obtained. become. Incidentally, when the seat cushion 2 is operated to stand up as shown in FIG. 13, the same effects as described above can be obtained.

(Effects of the invention) Since the invention has been made as described above, by improving the legs that support one side of the back surface of the seat cushion so that it can stand up and fall as well as slide back and forth, it has a very simple structure, but the seat cushion The locking pawl automatically becomes unlocked during the rising and falling operation, and the locking pawl automatically releases the locking pawl when the seat cushion is turned over and when the seat cushion is raised up. is in a locked state, positioning can be performed by regulating front and rear sliding, and there is no need to worry about back and forth movement, generation of abnormal noise, or damage due to collision with luggage during vehicle travel, and is highly practical.

[Brief explanation of drawings]

Figures 1 to 10 show one embodiment of the present invention, and Figures 1a to 1c show the first locking claw-equipped seat cushion in each state when the seat cushion is rotated from an inverted state to an upright state. A cross-sectional view of the leg body, Fig. 2 is a perspective view showing the fallen and unfolded state in which the occupant can be seated, Fig. 3 is a perspective view of the folded and upright state, and Fig. 4 is a state where the seat bag is folded forward onto the top surface of the seat cushion. Fig. 5 is a longitudinal sectional view in the state shown in Fig. 2;
Fig. 6 is a longitudinal sectional view in the state shown in Fig. 3, Fig. 7 is an exploded perspective view of the seat cushion frame and the first and second legs, and Fig. 8 is an exploded perspective view of the first leg. ,
Fig. 9 is a side view showing the seated use state, Fig. 10 is a side view showing the use state as a loading platform, Fig. 11 is a perspective view of main parts showing another embodiment of the present invention, and Fig. 12 is the same main part. A cross-sectional view of the seat cushion in an overturned state,
FIG. 13 is a sectional view of the main part of the seat cushion in an upright state. 1... Folding seat, 2... Seat cushion, 3... Seat back, 5... Leg body (first leg body), 7... Lower rail, 7c, 7d... Concave stepped portion,
8...Upper rail, 8c, 8d...Lock hole, 9...Rotating shaft, 10...Lock claw, 1
0a, 10b...claw portion, 30...rotating sleeve,
31...Elastic member.

Claims (1)

[Claims for Utility Model Registration] (1) A folding vehicle seat in which a leg body is provided on one side of the back surface of the seat cushion to support the seat cushion so that the seat cushion can stand up, fall over, and slide back and forth, A fixed lower rail that is elongated in the front and back and has recessed steps for slide locks at multiple locations spaced apart in the front and back directions on the side and on the other side, and a lower rail that is slidably fitted in the front and back direction on the lower rail. an upper rail, a rotating shaft that is rotatably attached to the upper rail via a bracket along the front-rear direction and supports the seat cushion so as to be able to stand up and fall; and a rotating shaft that has claws at both ends and is perpendicular to the rotating shaft. When the seat cushion is raised or turned over, it rotates back and forth with the shaft, and when the seat cushion is turned over, the claw portion at the one end engages the recessed step portions at a plurality of locations on one side of the lower rail. and when the seat cushion is in the upright state, the claw portion at the other end engages with the recessed step portion on the other side of the lower rail to respectively position and lock the seat cushion in the longitudinal direction, A vehicle for use in a vehicle, characterized in that the claws at both ends of the seat cushion are provided with locking claws that release the lock by separating from the recessed steps on both sides of the lower rail when the seat cushion is in the vicinity of a neutral position during a standing and falling operation. Folding seat. (2) The folding seat for a vehicle according to claim 1, wherein the lock pawl is configured to follow the rotation of the rotation shaft via an elastic member.