JPH0730421Y2 - Front seat for vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a seat installed in a vehicle such as an automobile, and more particularly to a front seat for a vehicle capable of sliding and reclining in the front-rear direction. Is.

(Prior Art) Generally, a sliding reclining seat is used for a front seat of an automobile in order to ensure a seating posture that suits an occupant's taste. Such a seat includes a seat cushion slidably supported in the front-rear direction by a slide rail and a seat back tiltable with respect to the seat cushion. The slide rail includes a lower rail fixed to the vehicle body and an upper rail slidable with respect to the lower rail, and the upper rail can be locked to the lower rail at an arbitrary position by a slide adjuster. A seat cushion is attached to each upper rail of the pair of left and right slide rails. Further, a seat back is attached to the upper rail so as to be rotatable in the front-rear direction via a reclining adjuster.

By the way, large forces in various directions act on the seat of such an automobile due to vehicle body vibration during traveling of the automobile and inertial force during turning or acceleration / deceleration. Therefore, in particular, the seat cushion must be securely fixed to the upper rail of the slide rail so as not to be displaced or come off by such a force.

Therefore, conventionally, as disclosed in Japanese Utility Model Laid-Open No. 60-113232, the frame of the seat cushion is fixed to the upper rail with bolts or the like.

(Problems to be solved by the invention) However, in the case where the seat cushion frame is fixed to the slide rail as described above, if the assembly is attempted in the vehicle body assembly line, then the cushion pad and the skin are further attached to the frame. Work to attach and is required. Since the work of attaching such pads and skins is extremely time-consuming, the work will affect other steps of the vehicle body assembly line.

Therefore, it is necessary to carry the entire seat into the vehicle body assembly line in a state where it is assembled to the slide rail in advance and fix the lower rail of the slide rail to the vehicle body. In that case, since the seat cushion is located above the lower rail, the fixing operation cannot be performed from above. Therefore, it is necessary to attach brackets protruding from the front and rear ends of the lower rail to the front and rear, respectively, and bolt the front and rear of the seat. Moreover, since the lower rail is short, it is necessary to slide the seat rearward, bolt the front bracket, and then slide the seat forward and bolt the rear bracket. Further, it is necessary to cover the rear bracket with a foot cover so that the bolt does not damage the appearance.

For this reason, it has been impossible for the conventional front seats to be automatically assembled to the vehicle body.

The present invention has been made in view of such a problem, and an object thereof is to easily assemble a seat cushion to a slide rail even in a vehicle body assembly line, and the seat cushion can be attached to the slide rail. To obtain a vehicle front seat that is securely fixed.

(Means for Solving the Problem) In order to achieve this object, in the present invention, the seat back is arranged such that its lower end is almost in contact with the upper surface of the rear end portion of the seat cushion in the standing state, and
A seat bracket rising from the upper rail is provided on each upper rail of the pair of left and right slide rails, and rod-shaped first and second support portions extending between the seat brackets are provided at front and rear portions of the seat bracket. I have to. The seat cushion has a lower surface on which a groove portion that engages with the left and right seat brackets and restricts the movement of the seat cushion in the left-right direction, and first and second engaging members that engage with the first and second support portions, respectively. A joint is provided. The first engagement portion engages with the first support portion when the seat cushion is moved in either the front-rear direction, and regulates the vertical movement of the front portion of the seat cushion. The second engagement portion engages with the second support portion when the rear portion of the seat cushion is moved downward, and independently or in cooperation with the engagement between the first engagement portion and the first support portion. It is supposed to act to regulate the movement of the seat cushion in the front-rear direction and regulate the downward movement of the rear portion of the seat cushion.

(Operation) The front seat thus configured is assembled to the vehicle body as follows. First, with the seat cushion not attached, assemble the slide rail to the vehicle body and tilt the seat back backward until it is almost horizontal.
Then, the seat cushion is moved in the front-rear direction at a position where the first engaging portion of the seat cushion faces the first supporting portion of the upper rail, and the first engaging portion and the first supporting portion are engaged with each other. Next, the seat cushion is rotated downward about the first support portion to engage the second engagement portion with the second support portion. Then, the seat back is raised.

When the seat is assembled in this manner, movement of the seat cushion in the left-right direction is restricted by the seat bracket, and movement of the seat cushion in the front-rear direction is at least the first engagement portion and the first engagement portion.
It is regulated by the engagement with the support portion and the engagement between the second engagement portion and the second support portion. Further, the vertical movement of the seat cushion is restricted by the engagement of the first engaging portion and the first supporting portion in the front portion, and the seat back and the second supporting portion are located above and below the rear portion in the rear portion. Regulated by Therefore, the seat cushion is securely fixed to the slide rail.

Since the slide rail is assembled to the vehicle body without the seat cushion, the slide rail can be bolted from above, and the automatic assembly can be performed.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of a vehicle front seat according to the present invention. FIG. 1 is a cutaway perspective view showing the entire structure of the vehicle front seat, and FIG. 2 is a cross-sectional front view of an essential part thereof. Also,
FIG. 3 is an explanatory view showing the assembling procedure.

As is apparent from FIG. 1, the front seat 1 of the automobile
Includes a seat cushion 2 on which an occupant sits and a seat back 3 which supports the back of the seated occupant. A headrest 4 is provided above the seat back 3.
The seat cushion 2 and the seat back 3 are a pair of left and right slide rails 5, which are installed in the vehicle body in the front-rear direction.
It is supposed to be supported by 5.

The seat cushion 2 includes a pan-shaped seat cushion frame 6 that supports a load, a cushion pad 7 attached to the frame 6, and a skin 8 that covers the surface of the cushion pad 7. These are assembled in advance, and the seat cushion 2 as a whole is made into one unit.

On the other hand, the seat back 3 is composed of a seat back frame 9 in which a back board 9b is attached to a pipe frame 9a, and a back pad 11 in which a skin 10 is covered in advance. A vertical groove 12 is formed on the back side of the upper portion of the back pad 11, and the back pad 11 is attached to the frame 9 by inserting it into the seat back frame 9 through the groove 12 and fixing it by an appropriate means. .

A headrest frame 13 is fixed to the center of the upper end of the seatback frame 9. And that frame 13
The headrest 4 is formed by inserting the headrest pad 15 covering the outer skin 14 into the.

As shown in FIG. 2, the slide rail 5 is composed of a lower rail 16 and an upper rail 17. The lower rail 16 is provided with mounting brackets 18 projecting laterally at both front and rear ends thereof, and by fastening the mounting bracket 18 to the vehicle body floor 20 with bolts 19, the lower rail 16 is fixed to the vehicle body. ing. The upper rail 17 is slidably supported by the lower rail 16. Then, the upper rail 17 is locked to the lower rail 16 at an arbitrary slide position by a slide adjuster (not shown).

A seat bracket 21 is fixed to the upper surface of the upper rail 17 so as to rise from the upper surface and extend in the front-rear direction. The seat bracket 21 is adapted to be fitted into groove portions 22 provided on both left and right sides of the seat cushion frame 6 which forms the lower surface of the seat cushion 2. At that time, the side surface of the groove 22 and the seat bracket 21 are engaged with each other.

Left and right seat brackets, as shown in Figure 1.
A pair of front and rear support rods 23 and 24 extending over the spaces 21 and 21 are attached. These support rods 2
3,24 are pipe-shaped with a circular cross section. A pair of left and right hooks 25, 25 that engage with the first support rod 23 on the front side are attached to the lower surface of the front portion of the seat cushion frame 6. This hook 25 has an open front end,
The distance between the upper and lower arms is substantially equal to the outer diameter of the first support rod 23. Therefore, when the seat cushion 2 is moved forward, its hook 25 engages with the first support rod 23, the load from the seat cushion 2 is transmitted to the first support rod 23, and the seat cushion 2
The vertical movement of the front part of the is controlled by the support rod 23. That is, in this embodiment, the support rod 23 and the hook 25 are the first support portion and the first engagement portion in the present invention.

On the other hand, the lower surface of the rear portion of the seat cushion frame 6 is provided with an engagement groove 26 that engages with the second support rod 24 on the rear side. The engagement groove 26 is opened at the lower end side, and its width is made substantially equal to the outer diameter of the second support rod 24. Therefore, when the rear portion of the seat cushion 2 is moved downward, the second support rod 24 fits in the engagement groove 26,
The load from the seat cushion 2 is transmitted to the second support rod 24 in contact with the upper bottom surface of the seat 26, and the movement of the seat cushion 2 in the front-rear direction is restricted by the support rod 24. That is, in this embodiment, the support rod 24 and the engagement groove 26 are the second support portion and the second engagement portion in the present invention.

The lower ends of the seat back frames 9 are rotatably connected to the rear ends of the seat brackets 21, 21. And
A reclining adjuster (not shown) locks the frame 9 at an arbitrary rotating position. In this way, the seat back 3 becomes the slide rail 5
Is rotatably supported by the upper rail 17 and its inclination is adjusted. The lower end of the seat back 3 is in contact with the upper surface of the rear end portion of the seat truncation 2 assembled to the slide rail 5 when the seat back 3 is in an upright state, that is, unless the seat back 3 is tilted down to be substantially horizontal. Has been

When the front seat 1 configured as described above is assembled to the vehicle body, the back pad 1 that covers the preformed seat cushion 2 and the skin 10 of the seat back 3 is formed.
1, the pad 15 of the headrest 4, and the slide rail 5 to which the seat back frame 9 is assembled are carried into the vehicle body assembly line. Then, first, the slide rail 5 is fixed to the vehicle body floor 20 with bolts 19.

At this time, since there is no obstruction above the slide rail 5, the bolt 19 can be tightened from above. Therefore, the four bolts 19 are simultaneously tightened by the automatic assembling device, and the left and right slide rails 5,
5 can be assembled at the same time.

After the slide rails 5, 5 are assembled to the vehicle body in this way, the seat back frame 9 is erected, and the back pad 11 is inserted into and fixed to the frame 9. In addition, the headrest frame 13 also has a headrest pad 15
Plug in. In this way, the seat back 3 and the headrest 4 are formed.

Then, the seat back 3 is tilted backward until it becomes horizontal as shown by the solid line in FIG. Then, the seat cushion 2 is set so that the groove portions 22 on both sides face the seat bracket 21 and the hooks 25 on the lower surface of the front face the first support rod 23 in a state where the rear end side is lifted and inclined. . Further, in this state, the seat cushion 2 is pressed forward. Then, the hook 25 engages with the first support rod 23.

Therefore, the rear end portion of the seat cushion 2 is pressed downward to rotate the seat cushion 2 downward about the first support rod 23. As a result, the second support rod 24 is fitted into the engagement groove 26 on the lower surface of the rear portion of the seat cushion 2 as shown by the phantom line in FIG. At this time,
Seat brackets 21 are fitted in the groove portions 22 on both sides of the seat cushion 2.

In this way, the assembly of the seat cushion 2 is completed.
Therefore, the seat back 3 is erected as shown by an imaginary line in FIG. Then, the lower end of the seat back 3 comes into contact with the upper surface of the rear end portion of the seat cushion 2, and the seat cushion 3 is pressed by the seat back 3.

Front seat 1 assembled to the vehicle body in this way
In, the movement of the seat cushion 2 in the left-right direction is
The side surfaces of the groove portions 22 provided on both the left and right sides of the seat cushion 2 are regulated by engaging with the seat brackets 21 fixed to the upper rails 17 of the left and right slide rails 5. Further, the movement of the seat cushion 2 in the front-rear direction is restricted by the engagement groove 26 provided in the seat cushion 2 and the second support rod 24 attached to the upper rail 17 engaging with each other. Since the hook 25 provided at the front portion of the seat cushion 2 is engaged with the first support rod 23 attached to the upper rail 17, the vertical movement of the front portion of the seat cushion 2 is restricted. . On the other hand, since the rear portion of the seat cushion 2 is sandwiched between the lower end of the seat back 3 and the second support rod 24 from above and below, the vertical movement of the rear portion of the seat cushion 2 is also restricted.

In this way, the seat cushion 2 is securely held in a state of being fixed to the upper rail 17 of the slide rail 5. After the front seat 1 is assembled, the rear seat is also assembled to the vehicle body, and the rear seat prevents the rearward rotation of the seat back 3 of the front seat 1 to the horizontal state. Therefore, the seat back 3 is tilted rearward to the maximum extent. The seat cushion 2 does not come off even when the seat cushion 2 is pushed.

Thus, the front seat 1 is assembled to the vehicle body with the seat cushion 2 removed, so that the work of fixing the slide rail 5 can be bolted from above. Therefore, the fixing work becomes easy, and the automatic assembling becomes possible. Further, when the seat cushion 2 is assembled, the mounting bracket 18 of the slide rail 5 is covered with the seat cushion 2 at the upper side.
The 19 does not impair the appearance. Therefore, the conventional foot cover becomes unnecessary.

Then, in the seat cushion 2, the hook 25 is engaged with the first support rod 23, the second support rod 24 is fitted in the engagement groove 26, and the seat back 3 is raised up at the end. Securely fixed to. Therefore, it is not necessary to tighten bolts to fix it,
The work of assembling the seat cushion 2 is remarkably simplified, and can be easily performed on the vehicle body assembly line.

In the above embodiment, the movement of the seat cushion 2 in the front-rear direction is restricted by the fitting of the second support rod 24 and the engagement groove 26, but the forward movement of the seat cushion 2 is prevented. First support rod 23 and hook 25
The rearward movement of the seat cushion 2 may be regulated by the rear surface of the seat cushion 2 contacting the second support rod 24.

Further, the hook 25 engages with the first support rod 23 by moving the seat cushion 2 forward, but by opening the hook 25 rearward, the seat cushion 2 moves backward. The hook 25 and the first support rod 23 can be moved so as to be engaged with each other.

Further, in the above embodiment, the back pad 11 of the seat back 3 and the pad 15 of the headrest 4 are also assembled in the vehicle body assembly line, but they may be assembled in advance as in the conventional one.

(Effect of the Invention) As is apparent from the above description, according to the present invention, the seat cushion can be attached to the slide rail after the slide rail is assembled to the vehicle body. Can be assembled without the seat cushion, and the assembly work can be easily automated. Further, since the mounting bracket of the slide rail can be located directly below the seat cushion, the appearance of the rear end portion of the slide rail can be improved and the foot cover and the like can be eliminated.

Then, by moving the seat cushion in the front-rear direction, the first engaging portion at the front portion of the seat cushion is engaged with the first supporting portion at the front portion of the slide rail, and the seat cushion of the seat cushion is engaged in the engaged state. By moving the rear part downward, the second engaging part of the rear part and the second supporting part of the rear part of the slide rail are engaged,
The vertical movement of the front portion of the seat cushion may be restricted by the first support portion, and the front-back movement of the seat cushion may be restricted by at least the first and second support portions. Further, the vertical movement of the rear portion of the seat cushion is restricted by the seat back and the second support portion. Therefore, the seat cushion can be reliably fixed to the slide rail by a simple work, and the work can be performed on the vehicle body assembly line.

In this way, it is possible to obtain the vehicle front seat that can be easily assembled to the vehicle body.

[Brief description of drawings]

FIG. 1 is a cutaway perspective view showing an embodiment of a vehicle front seat according to the present invention, and FIG. 2 is a transverse front view of a side portion of a seat cushion taken along the line II-II in FIG. FIG. 3 is an explanatory view showing a state when the seat cushion of the front seat is assembled. 1 …… Front seat 2 …… Seat cushion 3 …… Seat back 5 …… Slide rail 16 …… Lower rail, 17 …… Upper rail 18 …… Mounting bracket, 19 …… Bolt 21 …… Seat bracket, 22 …… Groove 23 ... First support rod (first support portion) 24 ... Second support rod (second support portion) 25 ... Hook (first engagement portion) 26 ... Engagement groove (second engagement portion)

Claims (1)

[Scope of utility model registration request] 1. A lower rail installed in a vehicle body in a front-rear direction,
And a pair of left and right slide rails composed of upper rails slidably supported by the lower rails in the front-rear direction, a seat cushion supported by the upper rails of the pair of left and right slide rails, and attached to the upper rails so as to be rotatable in the front-rear direction. A front seat for a vehicle, comprising: a seat back that is provided with; a lower end of the seat back that is substantially in contact with an upper surface of a rear end portion of the seat cushion when the seat back is erected; Seat brackets that stand up from the seat bracket are respectively provided, and rod-shaped first and second support parts that extend between the left and right seat brackets are provided at the front and rear parts of the seat bracket, respectively, and the lower surface of the seat cushion. In front A groove portion that engages with the seat bracket and restricts the lateral movement of the seat cushion, and a groove portion that moves the seat cushion in one of the front-rear direction to engage with the first support portion and thereby the seat cushion A first engagement portion that regulates the vertical movement of the front portion, and by rotating the rear portion of the seat cushion downward with the first engagement portion engaged with the first support portion, A second engagement portion that engages with the second support portion and restricts the movement of the seat cushion in the front-rear direction and the movement of the seat cushion rear portion downward. Front seats.