JPH0320194Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a rear seat of an automobile, and particularly to a rear seat having a structure in which a seat back can be slid up and down.

(Prior art) Conventionally, as a rear seat for automobiles, guide rails attached to the vehicle body panel (vehicle side)
There is a known device in which a slider attached to the back of the seat bag is engaged and the seat bag is slid up and down in conjunction with the front and back slide of the seat cushion (for example, Utility Model No. 59-88331). Publication No.).

When assembling this type of rear seat, when engaging the slider of the seat back with the guide rail, the space between the vehicle body panel and the seat back is narrow, making assembly work difficult. If a clearance is provided for the slider to engage with the guide rail for ease of engagement, there is a problem in that the slider rattles and generates running vibration noise.

In order to solve this problem, it has been proposed that the seat back be self-locking to the vehicle body to improve assembly ease (1986-
No. 98972). In other words, a shaft with a roller (slider) supported at one end is provided on a bracket attached to the upper part of the back of the seat bag so as to be able to protrude and retract freely in the width direction of the vehicle body, while a guide rail attached to the vehicle body side is provided with a shaft that supports a roller (slider) at one end. Grooves with side openings are formed so that the rollers can engage when the shaft protrudes, and when the shaft is biased in the protruding direction, the rollers are engaged with the grooves of the guide rail without rattling. It has become self-locking.

By the way, in the event of a car collision, a force is applied to the upper end of the rear seat due to inertia that tends to move it forward of the car. This force is concentrated at the engagement portion between the roller and the groove of the guide rail, particularly at the end portion of the groove of the guide rail on the seat back side. However, as described above, one side of the guide rail is opened so that the roller can move in and out due to the self-locking mechanism, so the rigidity of the end of the guide rail on the seat back side cannot withstand the above-mentioned inertial force. There is a risk that the rollers and the guide rails will disengage, and in that case, the rear seat will tilt forward.

(Purpose of the invention) This invention was made in view of the above problems.
A rear seat for an automobile that improves the ease of assembling the seat back to the guide rail, prevents the slider from coming off the guide rail even if inertia is applied to the seat back during a collision, and prevents the seat back from inadvertently tilting forward. It provides:

(Structure of the invention) The present invention is an automobile rear seat in which a slider attached to the seatback is engaged with a guide rail attached to the vehicle body side to move the seatback up and down. The guide rail is provided with a rail groove that is open on the side so that the slider can be engaged with the slider when the slider is projected, and the end of the guide rail on the seat back side is extended, A concave portion curved toward the front of the vehicle body is formed in this extended portion.

This mechanism allows the seat back slider to easily engage the guide rail.
Moreover, even if the seat bag attempts to tilt forward due to inertia during a collision, the slider fits into the recess and the seat bag is prevented from tilting.

(Example) As shown in Fig. 3, an automobile rear seat 1
The seat cushion 1a and the seat back 1b are connected via a bracket 3, and the seat cushion 1a is supported by a seat slider (not shown) on the vehicle floor so that it can freely slide forward and backward, and the seat back 1b can be slid up and down. freely supported.

A guide rail 5 is attached to the left and right (vehicle width direction) positions of the vehicle body panel 4 arranged at the upper rear of the seat bag 1b, and a guide rail 5 is attached to the rear surface of the seat bag 1b opposite to the guide rail 5. A slide mechanism 7 having a first roller (slider) 6 is provided.

As shown in FIGS. 1 and 2, the guide rail 5 has base portions 5a and 5a' fixed to the vehicle body panel 4 with bolts and nuts, and a flat portion 5b which a second roller 8 (described later) comes into contact with and receives a load. And this flat part 5
A rising portion 5c rises from the outer end of the seat bag 1b toward the seat bag 1b, a slope portion 5d bends diagonally inward from the rising portion 5c, and a slope portion 5d continuously extends further inward from the end of the slope portion 5d. A recess 5f curved toward the seat back 1b, that is, toward the front of the vehicle body, is formed in the extended portion 5e, and is set to a predetermined rail length. Further, the guide rail 5 is configured such that when the first roller 6 protrudes from the side in the width direction of the vehicle body, the guide rail 5 can engage with the rail groove 5g formed by the rising portion 5c and the slope portion 5d. The side facing the first roller 6 is opened 5h.

On the other hand, as shown on the right side in FIGS. 1 and 2, the slide mechanism 7 includes a guy member 7a attached to the back of the seat bag 1b via a bracket (not shown), and the guide member 7a. a rod 7b guided by and supported so as to be freely protrusive and retractable in the vehicle width direction; the first roller 6 pivotally supported on the outer end of the rod 7b; and the second roller 8 pivotally supported on the guide member 7a. , a spring 7c that biases the rod 7b in the protruding direction, and a lock release lever 10 that is rotatably supported on the seat back 1b side and biased to rotate in one direction by a spring 9.

Then, the rod 7b is inserted through the window 10a of the lock release lever 10, and the rod 7b is inserted into the window 10a of the lock release lever 10.
In the retracted state, the lock release lever 10 is engaged with the lock groove 7d formed in the rod 7b, thereby locking the protrusion of the rod 7b. On the other hand, when the lock release lever 10 is rotated and disengaged, the lock is released and the rod 7b projects due to the biasing force of the spring 7c, and in this projecting state, the inner edge of the window 10a of the lock release lever 10 is It comes into contact with the outer peripheral surface of the rod 7b.
In this protruding state, the first roller 6 passes through the opening 5h of the guide rail 5, engages with the rail groove 5g, and comes into contact with the slope portion 5d.

In FIGS. 1 and 2, reference numeral 11 indicates a reinforcing bead formed on the outside of the slope portion 5d and the extension portion 5e of the guide rail 5.

In the above configuration, the guide rail 5 is attached in advance to a predetermined position on the vehicle body panel 4. On the other hand, the slide mechanism 7 is attached to a predetermined position on the back of the seat bag 1b, and with the seat bag 1b tilted forward, the rod 7b of the slide mechanism 7 is locked in the retracted position, that is, the lock release lever 10
is engaged with the lock groove 7d as shown by the imaginary lines in FIGS. 1 and 2.

Next, when the seat back 1b is raised to the upright position, the tip of the lock release lever 10 comes into contact with the flat surface 5b of the guide rail 5, rotates clockwise in FIG. 2, and the lock is released.
The spring 7c causes the rod 7b to protrude outward in the width direction of the vehicle body (to the right in FIG. 1), and the first roller 6 passes through the opening 5h and engages with the rail groove 5g, thereby causing the seat back 1b to self-lock to the vehicle body panel 4. will be done. This first roller 6 comes into contact with the sloped part 5d, and the other second roller 8 contacts the flat part 5d.
b, so there is no rattling between the seat back 1b and the guide rail 5, that is, the vehicle body panel 4. Note that the second roller 8 has a role of supporting the load from the seat bag 1b. Furthermore, when the self-lock is released in order to remove the seat bag 1b, a suitable tool or the like may be inserted through the gap to move the rod 7b into the retracted state.

With this structure, when the seat back 1b tries to tilt forward due to inertia force in the event of a car collision, the first roller 6 comes off the rail groove 5g and tries to move toward the seat back 1b, that is, toward the front of the vehicle body. . At this time, in the present invention, since the extension part 5e is provided continuously to the slope part 5d forming the rail groove 5g, and the recess part 5f curved in the front direction of the vehicle body is formed here, the recess part 5f has a second part. 1 roller 6
The first roller 6 and the guide rail 5 are prevented from disengaging from each other. Therefore,
The seat back 1b is prevented from inadvertently tilting in the event of a collision or the like. Moreover, as mentioned above, the recess 5
By forming f, the rigidity of the guide rail 5 is improved, so the above effect becomes reliable.
In particular, in order to provide a self-locking mechanism, in a structure having an opening 5h so that the first roller 6 can enter into the side of the rail groove 5g of the guide rail 5, the slope portion 5d of the guide rail 5 is simply extended. However, forming the concave portion 5f in the extending portion 5e as described above does not sufficiently increase the rigidity.
This can greatly contribute to improving rigidity.

(Effects of the invention) As described above, according to the invention, in a rear seat in which the slider attached to the seatback is engaged with a guide rail attached to the vehicle body side to move the seatback up and down, the slider is attached to the vehicle body. The guide rail is movable in the width direction, and a rail groove with side openings is formed in the guide rail so that the slider can be engaged when the slider is projected, and
By extending the end of the guide rail on the seat back side to form a recess that curves toward the front of the vehicle body, even if the seat back tries to tilt forward due to inertia during a collision, the slider will fit into the recess. That tilting can be prevented. Furthermore, by forming the recessed portion, the rigidity of the guide rail is improved, and the effect of preventing the seat bag from tipping can be further enhanced.

[Brief explanation of drawings]

FIG. 1 shows the main parts of an automobile rear seat according to an embodiment of the present invention, and is a partially sectional plan view corresponding to arrow A in FIG. 2. FIG. FIG. 3 is a side view showing the overall configuration of the same rear seat. 1...Rear seat, 1b...Seat back, 4
...Vehicle body panel, 5...Guide rail, 5e...
Extension part, 5f...Recessed part, 5g...Rail groove, 5h
...Opening, 6...First roller (slider), 7
...Slide mechanism.

Claims (1)

[Scope of utility model registration request] In an automobile rear seat in which a slider attached to the seat back is engaged with a guide rail attached to the vehicle body side to move the seat back up and down, the slider is provided so as to be freely retractable in the width direction of the vehicle body. A rail groove with side openings is formed so that the slider can be engaged when the slider protrudes, and
A rear seat for an automobile, characterized in that the end portion of the guide rail on the seat back side is extended, and a recessed portion curved toward the front of the vehicle body is formed in the extended portion.