JP3334838B2 - Car seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a seat back for supporting a back of a seated person and a seat cushion for supporting a hip, and the seat cushion is detachably supported on a floor panel of a vehicle body. The present invention relates to an automobile seat having a cushion frame.

[0002]

2. Description of the Related Art When a floor panel surface is to be used as a load-carrying surface, a seat cushion of the above-mentioned type used as a supplement in a vehicle cabin is detached from the floor panel. When the seat cushion is to be used, the seat cushion can be fixed to the floor panel.

In this type of seat, the seat cushion is attached to and detached from the floor panel. When the seat cushion is attached to the floor panel, the seat cushion frame is attached to the floor panel. It must be firmly fixed. For this reason, conventionally,
As disclosed in Japanese Utility Model Laid-Open No. 4-84031,
At the front and rear of the seat cushion frame, a pair of locking devices arranged in the width direction of the seat are arranged,
Each of them was engaged with a striker fixed to the floor panel of the vehicle body, thereby fixing the seat cushion to the floor panel.

Each lock device can be released from each striker only by performing an unlocking operation, and such a lock device has a complicated structure and is expensive. Therefore, if a total of four locking devices are provided on the seat cushion frame as in the conventional case, not only does the cost of the entire seat increase, but also when the seat cushion is removed from the floor panel, locking is performed on a plurality of locking devices. Since the release operation has to be performed, the operation takes a great deal of trouble, and the disadvantage that the operability is deteriorated is unavoidable.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned conventional disadvantages and to reliably prevent the seat cushion from rattling against the floor panel surface when the seat cushion is mounted on the floor panel. It is an object of the present invention to provide a sheet of the type described at the beginning.

[0006]

According to the present invention, in order to achieve the above object, in a vehicle seat of the type described at the outset, a striker fixed to a floor panel is provided at a front portion of a seat cushion frame. A pair of hooks engaged in a detachable state are fixedly arranged at intervals in the width direction of the seat, and a striker fixed to the floor panel is provided at a central portion in the seat width direction at the rear of the seat cushion frame, and an unlocking operation is performed. A lock device that is engaged only in a state where the frame can be disengaged is attached, and on each side of the seat cushion frame in the seat width direction, the frame is attached to the floor panel, and the frame is attached to the floor panel. Positioning portion that engages with an engaging portion provided on the floor panel to prevent rattling in the front-rear direction and the width direction. There is proposed a structure which are respectively fixed.

At this time, the striker engaged with the hook projects upward through a slit formed in the carpet laid on the floor panel and extending in the width direction of the seat, and a lower portion of each hook engaged with the striker is provided. A protrusion projecting toward the rear of the seat so that a hook surface facing the upper surface of the carpet extends substantially parallel to the upper surface of the carpet and further to the rear side of the seat than the slit. Is advantageously formed.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows an example of a seat arranged at the rear of the passenger compartment of an automobile. The seat 1 includes a seat back 2 for supporting the back of a seated occupant (not shown) and a seat cushion 3 for supporting the buttocks. And The seat back 2 is connected to the seat cushion 3 via the seat recliner 4.
The seat 1 is pivotally supported to be tiltable in the front-rear direction X of the seat 1.

The seat cushion 3 has a seat cushion main body 5 shown by a chain line in FIG. 2 and a seat cushion frame 6 for supporting the main body 5, and the seat cushion main body 5 has a cushion material and a skin covering the cushion material. Have been
A seated person places the buttocks on the upper surface. The seat cushion body 5 is integrally attached to the seat cushion frame 6. The seat cushion frame 6 is made of a metal pipe integrally formed in a substantially rectangular shape, and has a front portion 7 extending in the width direction W of the seat 1, a rear portion 8 extending in parallel with the front portion, a front portion 7 and a rear portion. 8 has a pair of side parts 9 and 9 integrally connected to each end in the longitudinal direction.

An automobile seat 1 constructed as described above.
Is detachably supported on a floor panel 11 of the vehicle body, and by detaching the seat 1 from the floor panel 11, the upper surface of the floor panel 11 can be used as a luggage mounting surface or the like. In addition, by setting the seat 1 on the floor panel 11 as shown in FIG. 1, the seat 1 can be used as a seat which is its original purpose. As described above, the seat 1 is detachable from the floor panel 11, and the seat cushion frame 6 is detachably supported on the floor panel 11 of the vehicle body.

At this time, when the seat cushion frame 6 is mounted on the floor panel 11 as shown in FIG. 2, the seat 1 is positioned so that the seat cushion frame 6 is correctly positioned and fixed to the floor panel 11. It is configured as follows.

As shown in FIG. 2, a pair of hooks 12 are fixedly arranged at a distance from each other in the width direction W of the seat 1 in a pipe portion forming the front portion 7 of the seat cushion frame 6. These hooks 12 are made of a plate-like rigid body, for example, a metal plate, and the upper ends thereof are fixed to the seat cushion frame 6. As clearly shown in FIG. 3, a notch 13 is formed at a lower portion of each hook 12 and opens toward the front of the seat 1.

When the seat 1 is mounted on the floor panel 11, the notches 13 of the hooks 12 engage with the strikers 14 fixed to the floor panel 11, respectively.
Each striker 14 is made of a rigid body such as a metal rod extending in the width direction W of the sheet 1, and each end of the striker 14 in the longitudinal direction is a bolt 15.
Or, it is fixed to the floor panel 11 by other fixing means. The middle part of the striker 14 is separated above the upper surface of the floor panel 11, and the hook 12 is fitted to the middle part from the rear side of the seat 1. Therefore, when each hook 12 is pulled in the rear side of the seat 1, that is, in the direction shown by the arrow B in FIG.
Comes off the striker 14 as it is. In this way, each hook 12 can be detached freely from each striker 14.
Is engaged.

On the other hand, as shown in FIG. 2, one lock device 16 is attached to the pipe portion forming the rear portion 8 of the seat cushion frame 6 at the center in the seat width direction. Seat 1 is floor panel 1
When it is attached to the floor panel 1, it engages with a striker 17 fixed to the floor panel 11 as shown in FIG. The striker 17 is also made of a rigid body such as a metal rod extending in the width direction W of the sheet 1 similarly to the above-described striker 14, and each longitudinal end is fixed to the floor panel 11 by bolts or other fixing means. The intermediate portion is spaced above the upper surface of the floor panel, and the engaging member 18 of the lock device 16 is engaged with the intermediate portion as described below.

FIG. 5 is an enlarged view of the lock device 16 as viewed from the rear side of the seat 1, that is, in the direction of arrow V in FIG. 2, and FIG. 6 is a view of the lock device 16 as viewed from the left in FIG. . As can be seen from these figures, a base end of a bracket 19 is fixed to a pipe portion forming a rear portion 8 of the seat cushion frame 6, and a free end thereof is provided with a pair of base plates 20 and 21 of a lock device 16. Base 20a,
21a is fixed by bolts 22, 23 and a nut, respectively. Each base plate 20, 21 has flange portions 20b, 21b rising from the base portions 20a, 21a toward the rear side of the seat 1, and these flange portions 20b, 21b are opposed to each other, and their upper portions are mutually opposed. They are in contact, but are separated from each other below.

The flange portions 20 thus separated from each other
b, 21b, between the pole 26 and the engaging member 18 described above.
The pawl 26 and the engaging member 18 are connected to the flange portions 20b, 21b of the base plates 20, 21, respectively.
The shafts 24 and 25 are rotatably supported on the shaft 1, respectively, and these shafts 24 and 25 extend in the width direction W of the sheet 1. As described above, the pawl 26 and the engaging member 18 are supported by the flange portions 20b and 21b via the shafts 24 and 25 so as to be swingable. In FIG. 6, a part of the flange portion 20b of one base plate 20 is cut away to clearly show the engagement member 18 and the pawl 26.

As shown in FIG. 6, a lock groove 27 is formed in the engagement member 18, and when the seat 1 is mounted on the floor panel 11 as described above, the lock groove 27 Engages in the middle part in the direction. At this time, the pawl 2 is inserted into the locking groove 28 formed in the engaging member 18.
6 are engaged with each other, and the engaging groove 28 and the engaging claw 29 are pressed against each other by the pulling action of the tension spring 30 whose respective ends are engaged with the engaging member 18 and the pawl 26. And its detachment is prevented.

On the shaft 24 to which the pole 26 is fixed,
The base end of the handle 31 is fixed, and the handle 31 extends from the base end to the rear side of the seat 1.

When detaching the seat 1 from the floor panel 11, first, the tip of the handle 31 shown in FIG.
Is rotated upward as shown by arrow A in FIG. This allows
The pawl 26 integrally connected to the handle 31 via the shaft 24 rotates counterclockwise in FIG. 6, and the locking claw 29 is disengaged from the locking groove 28 of the engaging member 18. Accordingly, the engaging member 18 is pulled by the tension spring 30 and its shaft 2
5 rotates counterclockwise in FIG.
At this time, as shown in FIG. 7, the engaging member 18 comes into contact with a tongue-like stopper 32 protruding from the flange portion 21b and stops. When the operator releases the handle 31, the pole 2
6 rotates back to its original position, stops as it contacts the engaging member 18 as shown in FIG. In this manner, both the pawl 26 and the engaging member 18 are held at the positions shown in FIG.
The lock groove 27 of 8 is disengaged from the striker 17 and the locked state of the lock device 16 is released.

Next, while lifting the rear portion of the seat cushion 3 upward and pulling it toward the rear side of the seat 1 (in the direction of arrow B in FIG. 3), both hooks 12 shown in FIGS.
Comes off the striker 14. In this state, if the seat 1 is lifted as it is, the seat 1 can be detached from the floor panel 11.

When the seat 1 is mounted on the floor panel 11, the hook 12 and the striker 14 are first opposed to each other, and the seat 1 is moved from the rear to the front (the direction opposite to the arrow B direction in FIG. 3).
When pressed toward, each hook 12 engages with the striker 14 as shown in FIG. Next, when the rear portion of the seat cushion 3 is lowered, as can be seen from FIG.
The engaging member 18 hits the striker 17, and the reaction force causes the engaging member 18 to rotate clockwise in FIG. 7, thereby causing the striker 17 to lock the lock groove 2 of the engaging member 18.
7 is engaged as shown in FIG. During this operation, the pole 2
6 is once rotated counterclockwise by being pressed by the engagement member 18, is again pulled by the spring 30 and rotates clockwise, and its locking claw 29 is locked by the locking groove 28 of the engagement member 18. And the two members are integrally connected.

In this state, even if the rear portion of the seat cushion 3 is lifted up without operating the handle 31, the engagement between the engaging member 18 and the striker 17 is not released, and the seat 1 is And keep it fixed. As described above, the lock device 16 is engaged with the striker 17 fixed to the floor panel 11 in a state where the lock device 16 is detached only by the unlocking operation. Only when the handle 31 is turned, the lock of the lock device 16 is released, and the lock device 16 can be released from the striker 17.

According to the structure of the seat 1 described above, one lock device 16 is provided which can be released from the striker 17 only by an unlocking operation, and the hook 12 which is engaged with the striker 14 so as to be freely released is provided. Therefore, when the seat 1 is removed from the floor panel 11, only one lock device 16 needs to be operated, and the operation can be performed very easily. In addition, the number of expensive lock devices 16 is one, and the other two hooks 12 are low-cost members, so that the overall cost can be effectively reduced. In this way, the disadvantages of this type of conventional sheet can be reliably eliminated.

As shown in FIG. 5 and FIG.
Anchor plates 34, 34 around which the seat belts 33, 33 for the occupant are engaged are rotatably attached to both flange portions 20b, 21b of the base plates 20, 21 via bolts 35. As the seat belt 33
When the anchor plate 34 is attached to the originally strong base plates 20 and 21, it is not necessary to reinforce the rear portion of the seat cushion frame 6, and the cost can be reduced.

When a pair of locking devices spaced apart from each other are provided at the rear portion of the seat cushion frame as in the conventional seat described above, it is necessary to attach an anchor plate for a seat belt to a frame intermediate portion therebetween. In this case, when a large external force is applied to the seat cushion frame via the anchor plate, the frame needs to be reinforced with a strength member so that the frame is not deformed. For this reason, the disadvantage that the cost rises is unavoidable.

On the other hand, in the seat 1 of this embodiment, as described above, since the anchor plate 34 is connected to the base plates 20 and 21 having high strength and the seat cushion frame 6 via the bracket 19, Even if a special reinforcing member is not provided on the frame 6, when a large external force acts on the frame 6 via the anchor plate 34,
There is no possibility that the seat cushion frame 6 will be deformed.
Since the reinforcing member can be omitted in this manner, the cost of the sheet 1 can be effectively reduced.

According to the sheet 1 of this embodiment, the various advantages described above can be obtained. However, the front part 7 of the seat cushion frame 6 is connected to the floor panel 11 via the two hooks 12 and the striker 14, and the rear part 8 is connected to the floor panel 11 by one.
When the frame 6 is connected to the floor panel 11 via three locking devices 16 and the striker 17 to support the frame 6 at only three points, the front hook 12
4 and the lock device 16 is movably engaged with the striker 17 in the width direction W of the seat 1. 1 may rattle in the width direction W during use.

Therefore, in the seat 1 of this embodiment, as shown in FIGS. 2 and 8, the seat cushion frame 6 is mounted on each side 9 in the seat width direction, with the frame 6 attached to the floor panel 11. Positioning members 37 respectively engaged with engaging portions 36 provided on the floor panel 11
Are fixed respectively.

That is, an upper end of a metal bracket 38 extending downward is fixed to a pipe portion forming each side portion 9 of the seat cushion frame 6, and a positioning member 37 made of hard rubber is fixed to the lower end. . In this example, the base end of the bolt 39 is embedded and fixed in each of the positioning members 37, and its screw portion is screwed to a nut 40 fixed to the bracket 38 by welding. It is fixed to.

On the other hand, a receiving member 41 formed of a metal plate is bolted to the floor panel 11, and an engaging portion 36 formed of a concave groove is formed at the center of the receiving member 41. With the seat 1 attached to the floor panel 11, the above-mentioned positioning members 37 are engaged with the respective engaging portions 36 provided on the floor panel 11 without rattling.
This prevents the seat cushion frame 6 from rattling with respect to the floor panel 11 in the front-rear direction X and the width direction W of the seat 1.

As described above, according to the sheet of the present embodiment, the drawbacks of the conventional sheet can be reliably removed, and the sheet 1 can be prevented from rattling during use.

By the way, as shown in FIGS. 9 and 10,
When the mat 42 and the carpet 43 are laid on the upper surface of the floor panel 11 on which the seat 1 is attached, the striker 14 with which the hooks 12 are engaged
Slits 44 formed in a carpet 43 laid in
Project upward through The slit 44 extends in the width direction W of the sheet 1 in accordance with the direction in which the striker 14 extends.

When the seat 1 is detached from the floor panel 11, the hooks 12 are connected to the seat 1 as described above.
10, that is, in the direction of arrow B in FIG. 10. At this time, assuming that the lower portion of each hook 12 is formed as shown in FIG. Caught on slit 44,
This may damage the carpet 43.

Therefore, in the examples shown in FIGS. 9 and 10,
At the lower part of each hook 12 engaged with the striker 14, a projection 45 projecting rearward of the seat 1 is formed. Therefore, when each hook 12 is engaged with the striker 14, the hook surface 46 facing the upper surface of the carpet 43 is substantially parallel to the upper surface of the carpet 43 and on the rear side of the sheet 1 with respect to the slit 44. It will extend to. For this reason, when each hook 12 is pulled in the rear side of the seat 1, that is, in the direction of arrow B in order to detach the seat 1 from the floor panel 11, the hook 12 has its hook surface 46 on the upper surface of the carpet 43. Is disengaged from the striker 14 while sliding smoothly. Therefore, a problem that the hook 12 is caught in the slit 44 does not occur, and the carpet 43 can be prevented from being deteriorated early.

The other configurations of the embodiment shown in FIGS. 9 and 10 are the same as those of the embodiment described above.

The present invention can be widely applied not only to passenger cars and trucks but also to special automobiles such as buses. Further, various types of locking devices other than the locking device described above can be employed, and the same applies to hooks and strikers.

[0038]

According to the first aspect of the present invention, the seat cushion can be attached to and detached from the floor panel by a simple operation, and the cost of the seat can be reduced. In addition, the seat can be prevented from rattling during use, and there is no possibility that the seated person will feel uncomfortable.

According to the vehicle seat of the second aspect, even when a carpet is laid on the floor panel surface, the carpet can be prevented from being damaged early by the hook.

[Brief description of the drawings]

FIG. 1 is a perspective view of a seat.

FIG. 2 is a view showing a seat cushion of the seat shown in FIG. 1, and a main body thereof is schematically indicated by a chain line.

FIG. 3 is a perspective view showing a hook and a striker with which the hook is engaged.

FIG. 4 is a perspective view showing a lock device and a striker with which the lock device is engaged.

FIG. 5 is an enlarged view as viewed from the direction of arrow V in FIG. 2;

FIG. 6 is a view seen from the left side of FIG. 5, showing a part of a flange portion cut away.

FIG. 7 is a view similar to FIG. 6, showing a state when the engaging member is disengaged from the striker.

FIG. 8 is an enlarged sectional view taken along line VIII-VIII of FIG. 2;

FIG. 9 is a perspective view showing a carpet laid on a floor panel and a seat having another form of hook.

FIG. 10 is a cross-sectional view showing a state where hooks of the sheet shown in FIG. 9 are engaged with a striker.

[Explanation of symbols]

 Reference Signs List 1 seat 2 seat back 3 seat cushion 6 seat cushion frame 7 front portion 8 rear portion 9 side portion 11 floor panel 12 hook 14 striker 16 lock device 17 striker 36 engaging portion 37 positioning member 43 carpet 44 slit 45 protruding portion 46 hook surface X Front-back direction W Width direction

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B60N 2/00

Claims (2)

(57) [Claims] 1. A seat back for supporting a back of a seated person;
A seat cushion for supporting the buttocks, wherein the seat cushion has a seat cushion frame detachably supported on a floor panel of a vehicle body; A pair of hooks that are engaged with the striker fixed to the floor panel so as to be freely detachable are fixedly arranged at an interval in the width direction of the seat, and a floor is provided at the center of the rear portion of the seat cushion frame in the seat width direction. A lock device that is engaged with the striker fixed to the panel so that the striker can be disengaged only by the unlocking operation is attached, and on each side of the seat cushion frame in the seat width direction, the frame is attached to the floor panel. That the frame rattles against the floor panel in the front-rear direction and width direction of the seat. A vehicle seat, wherein positioning members for engaging with engagement portions provided on a floor panel are fixed to prevent the vehicle. 2. A striker with which the hook is engaged projects upward through a slit formed in a carpet laid on a floor panel and extending in a width direction of a sheet, and is provided at a lower portion of each hook engaged with the striker. The protrusion projecting toward the rear of the seat is such that a hook surface facing the upper surface of the carpet extends substantially parallel to the upper surface of the carpet and extends to the rear side of the seat beyond the slit. An automotive seat according to claim 1 formed.