JP2551956Y2 - Seat belt sliding anchor structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates mainly to a sliding anchoring structure for a safety seatbelt in a rear seat, a front seat or the like which is installed in a vehicle body such as an automobile so as to be able to slide forward and backward.

[0002]

2. Description of the Related Art In general, a front seat (for a driver or an auxiliary seat) and a rear seat are installed in a cabin of an automobile body. In recent years, most of these seats are mounted on the upper part of the floor of the vehicle body via a seat slide device, and are so-called slide seats in which the position of a seat cushion can be adjusted in the front-rear direction according to the physique and preference of a seated person.

[0003] The seat slide device for the slide seat is provided as a seat adjuster for mounting the seat on the floor of the vehicle body, and a pair of right and left is arranged below the seat cushion, and each is fixed to the floor surface (floor) of the vehicle body. For example, the main body is a long lower rail having a lip groove shape and a long upper rail having, for example, a hat-shaped cross section, which is slidably fitted back and forth with a plurality of rollers interposed between the lower rails. The cushion frame is fixed and supported, and the upper rail lock mechanism is provided.By operating the release lever of this lock mechanism, the upper rail is moved back and forth with respect to the lower rail, and the seat cushion is slid back and forth to a desired position. Positioning can be adjusted.

[0004] On the other hand, it is obligatory for the above-mentioned seat to be equipped with a seatbelt for protecting the safety of the occupant. Since an excessive tensile force is applied to the seat belt anchor obliquely upward and forward in the event of a collision or the like, the anchor is directly fixed to the floor, which is a strength member of the vehicle body, so as to withstand this force. Is common. However, in the above-mentioned slide seat that can be adjusted to slide back and forth, if the seat belt anchor is fixed directly to the floor of the vehicle body, if the seat is adjusted to slide back and forth halfway,
In addition, the seat belt does not follow, and the seat belt is excessively tightened or largely loosened, causing various inconveniences such as giving a seated person a sense of incongruity or anxiety.

[0005] To this end, a belt-in type slide seat in which an anchor of a seat belt is fixed to a seat cushion frame has been considered. An excessive tensile force input from the seat cushion frame is applied to the seat slide device from the seat cushion frame, and the upper rail may be detached from the lower rail, so that safety cannot be ensured.

[0006] In recent years, a slide seat has a slide type anchoring structure for a seat belt. An adjuster rail that is long in the front-rear direction and has a plurality of locking teeth on the lower side is connected to and fixed to the floor at the front and rear ends of the adjuster rail, on the lower body floor of the lower side of the slide seat. A slider (anchor ledge) which is loosely fitted so as to be able to move back and forth is attached to the lower portion of the seat cushion, and an anchor of the seat belt is connected and fixed to the slider.

With such a seat belt sliding anchoring structure, the slider to which the anchor of the seat belt is fixed can move back and forth with respect to the adjuster rail together with the seat cushion in normal times. In addition, the slider and the seatbelt follow and move back and forth, thereby preventing problems such as excessive tightening and loosening of the seatbelt.
If a strong upward pulling force acts on the slider from the seat belt via the anchor in the event of a collision, etc., the lower part of the slider will be engaged with the lower part of the adjuster rail in the process of lifting the slider. Engagement with the pawls is reliably received by the adjuster rails, ensuring safety.

[0008]

By the way, in recent automobiles, in order to make the interior space of the vehicle as large as possible to improve the occupant's livability, the height of the seat cushion of the slide seat can be increased. In order to keep the height as low as possible, many devices have been devised to reduce the vertical height of various devices and structures on the lower side in millimeter units. From this perspective,
Also in the above-mentioned seat belt slide type anchoring structure, it is required that the gap between the adjuster rail and the slider that is loosely fitted to the front and rear can be designed as small as possible to reduce the vertical height dimension. Have been.

However, the adjuster rail and the slider which is loosely fitted to the adjuster rail so as to be able to move back and forth are designed and manufactured so that the gap between them is very small, and when the slide seat is assembled to the vehicle body, the adjuster rail is required. When the slider is attached to the lower part of the seat cushion and assembled with the slider at the front and rear ends on the vehicle body floor, the adjuster rail has a fixed structure that supports both front and rear ends on the floor and has no play. Due to accuracy errors, the slider must move back and forth with the adjustment of the seat cushion, but the lower part of the slider is caught by the lower locking teeth of the adjuster rail. The front and rear of the seat cushion cannot be adjusted. Or gone, or adjuster rail and the slider there is a problem or to generate a noise and rub against each other. Also, Japanese Utility Model Laid-Open No. 1-107659,
See, for example, Japanese Unexamined Utility Model Publication No. 2-83151.
Equivalent to an adjuster rail, such as a Toberto device
Only the rear end of the member in the front-rear direction is
There is also a proposal to wear it and make the front end side free,
These are in one direction (around the axis of the bolt)
Only adjuster rail can be installed
Insufficient ability to absorb errors and vehicle body accuracy errors
Depending on the size of the error,
Ride adjustment becomes impossible or abnormal noise occurs when sliding
Sometimes.

[0010] The present invention has been made in view of the above circumstances,
The purpose of this is to design and manufacture the adjuster rail and the slider that is loosely fitted to it so that it can move back and forth so that the gap between them is very small. An object of the present invention is to provide a seat belt slidable anchoring structure which can be smoothly moved back and forth without being caught on an adjuster rail, and which does not cause any inconvenience in adjusting a seat cushion in a forward and backward slide.

A second object is to provide, in addition to the first object, a slide belt anchoring structure for a seat belt which does not generate abnormal noise even when the adjuster rail rubs against the slider. To provide.

[0012]

SUMMARY OF THE INVENTION In order to achieve the first object, the present invention provides a vehicle in which a seat is installed so that the seat can be slidably adjusted in the front-rear direction. While installing the adjuster rail with locking teeth,
The anchor of the seat belt provided on the seat is connected and can slide back and forth with the seat on the adjuster rail in a normal state, and the adjuster rail is locked when a strong pulling force acts obliquely forward and upward from the seat belt in a collision accident or the like. the sliding type anchoring structure of the seat belt provided with a slider which moves in engagement with the teeth is prevented, said adjuster rail, and the front free and and the front side lateral direction of the vehicle body and the vehicle body on
The rear end can be swung so that it can be displaced downward.
It is characterized in that it is attached to the surface .

According to the present invention, in order to achieve the second object, in the seat belt slidable anchoring structure having the above-mentioned structure, the adjuster rail is at least low in the longitudinal direction at least over the range of forward and backward movement of the slider. It is characterized by being covered with a synthetic resin coating having a low friction coefficient.

[0014]

According to the seat belt slidable anchoring structure of the present invention having the above-described structure, the gap between the adjuster rail and the slider that can move back and forth with respect to the adjuster rail is reduced in order to reduce the vertical height. very be fabricated designed to decrease state, when they are assembled with sliding seat on a vehicle body floor upper, said adjuster - or rail without fixing the front and rear ends as in the prior art, the free front end
The front end side is displaced in the vehicle body left and right direction and the vehicle body up and down direction
The rear end is mounted on the vehicle body floor so that the rear end can be swung so that the adjuster rail can move freely around the rear end , even if there is an error in the assembly accuracy of the entire slide seat. As a result, there is no problem such as the slider getting caught on the lower locking tooth of the adjuster rail, and the slider can smoothly move back and forth with the front and rear slide adjustment of the seat cushion with respect to the adjuster rail. become. Also, if a strong tensile force obliquely upward and forward from the seat belt acts on the slider in the event of a collision or the like, the lower portion of the slider engages with the lower locking teeth of the adjuster rail. At this time, the front end of the adjuster rail is free and the rear end of the adjuster rail is connected to the vehicle body floor, so that it reliably receives a strong forward diagonal upward pulling force input from the seat belt to the slider so as to prevent the movement of the slider. Become.

Further, if the adjuster rail is covered with a thin synthetic resin coating having a low friction coefficient over at least the longitudinal movement range of the slider, the adjuster rail at the lower side of the adjuster rail may be provided. The seat cushion can be moved back and forth with the sliding adjustment of the seat cushion even more smoothly without catching the slider against the locking teeth, and no unpleasant noise is generated even if the adjuster rail and the slider rub against each other. . If a strong pulling force is applied to the slider obliquely upward and forward from the seat belt in the event of a collision, etc., the lower side of the slider pushes away the thin synthetic resin coating of the adjuster rail and the lower locking teeth Engagement prevents movement.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. Here, an example in which the seat belt sliding anchoring structure of the present invention is applied to a bench type rear seat 1 for two or three people as shown in FIG. 7 will be described. It goes without saying that the present invention can be similarly applied to a single type front seat.

The bench-type rear seat 1 shown in FIG. 7 includes a horizontally long sofa-shaped seat cushion 2,
A pair of left and right seat backs 3 of a separate type, which are set up slightly rearward at the rear of the upper surface. The seat back 3 can be adjusted to rotate forward and backward with respect to the seat cushion 2 by the reclining device 4, and can select a desired rising angle of the seated occupant, or can lean forward or backward to a full flat state.

As shown in FIGS. 1 and 7, the rear seat 1 is a so-called slide seat mounted on the vehicle body floor portion 5 via a seat slide device 6 so as to be able to slide forward and backward. The seat slide device 6 has a pair of right and left sides arranged below the lower frame 2a of the seat cushion 2 and has a lip groove shape in which front and rear end portions are fixed on the vehicle body floor surface portion 5 via brackets 7 respectively. A long lower rail 8 and a plurality of rollers 9 (see FIG. 1)
And a long upper rail 10 having a hat-shaped cross-section, which is slidably fitted back and forth with the interposition of the lower frame 2a of the seat cushion 2 fixedly supported on the upper rail 10. With a configuration provided with a lock mechanism (not shown) of the upper rail 10, the upper rail 10 is moved back and forth with respect to the lower rail 8 by operating a release lever of the lock mechanism, and the seat cushion 2 is slid and positioned at a desired position in the front and rear directions. It can be adjusted.

On the seat cushion 2 of the rear seat 1 that can be slid forward and backward, three pairs of buckle-equipped seat belts 1 that can be disengaged and operated to protect the occupant's safety.
1 is provided. The outermost left and right outer seat belts 11 are directly fixed by bolts at the lower end (not shown) to the floor, which is a strength member of the vehicle body. It is electrically connected to the lower side of the back surface through a gap between the seat cushion 2 and the seat back 3 and is connected to the sliding anchoring structure of the seat belt of the present invention.

Here, the sliding type anchoring structure of the seat belt is provided on the vehicle body floor 5 below the seat cushion 2 in a pair of right and left sides. Each is mainly composed of an adjuster rail 20 and a slider 30 that is loosely fitted to the adjuster rail 20 so as to be able to move back and forth.

More specifically, referring to FIGS. 1 to 5, the adjuster rail 20 is made of a steel plate having an elongated L-shaped cross section which is long in the front-rear direction, and an upper horizontal plate portion 20a having an inverted L-shaped cross section is provided at the rear. The rear-end mounting flange portion 20b extends in a gentle Z shape. Also, the adjuster rail 20 is a hanging plate portion 20c having an inverted L-shaped cross section.
A plurality of locking teeth 20d are formed at the same pitch on the lower side of the rear half of the. Moreover, the adjuster rail 20 is covered with a synthetic resin covering 21 over substantially the entire length of the inverted L-shaped cross section (including the portion where the locking teeth 20d are present). The coating 21 is a thin, hollow cylinder-shaped, low-friction coefficient integrally formed of a synthetic resin such as vinyl chloride, such as a sword sheath, and is inserted into the adjuster rail 20 from the front end side so as to cover the adjuster rail 20 in a substantially adhered state. It is fastened by a rivet 22 so as not to come off at the front end portion.

With such an adjuster rail 20, the front end side is free, and only the horizontal rear end mounting flange portion 20b is mounted on the floor 5 of the vehicle body with the mounting bolts interposed between the washer 23, the collar 24 and the spring seat 25. 26 are connected by tightening in the vertical axis. This allows the adjuster rail 20 to elastically deform the rear end mounting flange portion 20b itself and the spring seat 25 against horizontal external force.
The mounting bolt 26 can be swung up and down in the vertical direction depending on the degree of tightening of the mounting bolt 26 via the mounting bolt 26 on the vertical axis, and can also be swung out in the left and right direction via the collar 24 around the mounting bolt 26 on the vertical axis. Has become. That is, Aja
The front end side of the star rail 20 is in the left-right direction of the vehicle and on the vehicle
The rear end can be swung so that it can be displaced downward.
It is attached to the surface.

A pair of right and left rising plate portions 20e are formed on the rear end mounting flange portion 20b of the adjuster rail 20 so as to sandwich the mounting bolt 26. Moreover, the rear end mounting flange portion 20 of the adjuster rail 20
As shown in FIGS. 5 (a), 5 (b) and 5 (c), b is covered and covered by a cover 27 made of a synthetic resin molded product, and its design is maintained. The cover 27 has rib-shaped projections 27a, 27b, 27c, 27d, 27e integrally formed on the inner surface thereof.
By contacting each part of the rear end mounting flange portion 20b, these are kept loose without loosely moving or coming off, and, conversely, the lowering of the adjuster rail 20 due to its own weight. It is designed to moderate unnecessary swing in the left and right directions.

On the other hand, as shown in FIGS. 1 to 3, the slider 30 has a box-shaped anchor ledge 31 made of sheet metal and an approximately inverted hat shape which is connected and fixed to the lower surface by a plurality of caulking pins and rivets 32. And the U-shaped member 33. The anchor ledge 31 has a pair of right and left welding nuts 31b for connecting the seat belt anchor to the rear end rising plate 31a. The U-shaped member 33 has a tongue piece 33b at the front end of the lower bottom plate portion 33a, which is raised in a substantially Z shape and extends forward, and has a bottom plate portion 33a.
At the rear end of the upper surface, there is provided a locking pin 33c extending horizontally to the left and right.

The slider 30 is disposed so that the U-shaped member 33 below the anchorage 31 is loosely fitted to the adjuster rail 20 such that the U-shaped member 33 can move back and forth with a small gap in both the upper, lower, left and right directions. In this state, the front end portion of the upper anchor ledge 31 is rotatably attached to and supported by the lower end of a support arm 34 protruding from the seat cushion 2 via a pivot pin 35, and the front and rear slide adjustment of the seat cushion 2 is performed. It is possible to follow the direction. Upper anchorage 31 of this slider 30
The lower end anchor 11a of the seat belt 11 is connected and fixed by fastening connection bolts 35 to a pair of left and right welding nuts 31b of the rear end rising plate 31a.
Note that the support arm 34 is made of a wide sheet metal that has an upper end fitted to the rear end side of the inner frame (pipe frame) 2b of the seat cushion 2 and protrudes obliquely downward and forward.

The operation of the seat belt slidable anchoring structure according to the present invention having the above-described structure will be described. In order to reduce the vertical height, the adjuster rail 20 and the slider which can move back and forth with respect thereto are described. 30 is designed and manufactured in a state in which the gap between them is very small, and when they are assembled together with the seat 1 on the vehicle body floor 5, the adjuster rail 20 is not fixed at both front and rear ends, and the front end is free. Since only the horizontal rear end mounting flange portion 20b is connected and mounted to the vehicle body floor surface portion 5 with the mounting bolt 26, even if there is an error in the assembly accuracy of the entire seat 1,
The adjuster rail 20 escapes so as to move around the rear end side as a fulcrum, and absorbs the error.
There is no such a problem that the locking pin 33c and the tongue piece 33b of the character member 33 are hooked on the locking teeth 20d on the lower side of the adjuster rail 20, and the slider 30 can be adjusted with respect to the adjuster rail 20 by sliding the seat cushion 2 back and forth. You can move back and forth smoothly. In addition, at this time, the adjuster rail 20 is covered with a thin synthetic resin coating 21 such as vinyl chloride having a low friction coefficient over at least the longitudinal movement range of the slider. 20 lower locking teeth 2
0d, the slider 30 is no longer hooked, and the slider 30 can be more smoothly moved back and forth together with the forward and backward slide adjustment of the seat cushion 2, and the adjuster rail 20 and the slider 30
Even if they rub against each other, unpleasant noise is not generated.

If a strong pulling force is applied to the slider 30 obliquely upward and forward from the seat belt 11 in the event of a collision or the like, the pivot pin 35 first moves from the state shown in FIG.
The anchor ledge 31 of the slider 30 pivots obliquely forward and upward together with the seat cushion 2 around the center of the slider 30, whereby the lower U-shaped member 33 of the slider 30 moves obliquely forward and upward in FIG.
As shown in FIG.
Pushes back the clothing 21 and engages it with the nearby engagement teeth 20d below the adjuster rail 20. At this time, the U-shaped member 33
The lower tongue piece 33b abuts on the lower side of the adjuster rail 20 and functions as a guide for inserting the locking pin 33c into the locking tooth 20d.

When the locking pin 33c is engaged with the locking tooth 20d below the adjuster rail 20, the adjuster rail 20 is pulled obliquely upward and forward by the strong pulling force, and is bent in a substantially Z shape. The rear end mounting flange portion 20b that has been extended as shown in FIG.
Anything beyond that is supported by the mounting bolts 26 to reliably receive the strong tensile force input from the seat belt 11 to the slider 30. Thus, the safety of the occupant wearing the seat belt 11 can be maintained.

Next, another embodiment of the seat belt sliding anchoring structure of the present invention will be described with reference to FIGS. 8 and 9. FIG. Here, only the configuration corresponding to FIGS. 2 and 6 of the above embodiment is shown, and the other portions are substantially the same as those of the above embodiment, and are not shown. First, in the figure, reference numeral 40 denotes an adjuster rail which is attached to the vehicle body floor 5 by connecting only the rear end thereof, and the slider 30 is loosely fitted to the front and rear so as to be able to move back and forth. Since the slider 30 is the same as that of the above-described embodiment, the same reference numerals are used to simplify the description. Here, the adjuster rail 40 is made of a steel plate having an inverted L-shaped cross section that is long in the front-rear direction. The hanging plate portion 40a having the inverted L-shaped cross section extends rearward to form a vertical rear end mounting flange portion 40b. A plurality of locking teeth 40d are formed at a constant pitch below the rear half of the hanging plate portion 40a of the adjuster rail 40, and the locking teeth 40d extend over substantially the entire length of the inverted L-shaped cross section. (Including a portion to be covered.) The cover 41 is made of a thin synthetic resin coating 41 having a low friction coefficient such as vinyl chloride.

The front end of the adjuster rail 40 remains free, and the vertical rear end mounting flange 40
b is a U-shaped bracket 42 fixed on the floor 5 of the vehicle body, and a pair of left and right collars
4 and a wave washer 45.
Thus, the adjuster rail 40 has a rear end mounting flange portion 40b with respect to an external force in the vertical direction, and the mounting pin 43 having a horizontal axis.
In addition to being able to swing in the vertical direction with the center as the center, it is also possible to swing in the left and right direction by the right and left wave washers 45 to escape. That is,
The front end side of the just rail 40 is in the left-right direction of the vehicle and the vehicle
The rear end can be swung so that it can be displaced in the vertical direction of the body
It is attached to the body floor. As a result, the same functions and effects as in the above embodiment can be obtained.

[0031]

[Effects of the Invention] The seat belt slidable anchoring structure of the present invention is constructed as described above, so that the gap between the adjuster rail and the slider which can be freely moved back and forth in the adjuster rail is extremely small. Even if the product is designed and manufactured, the slider can be moved back and forth smoothly without being caught on the adjuster rail or generating abnormal noise while the seat cushion is being adjusted back and forth while the seat is being assembled. Does not occur.

[Brief description of the drawings]

FIG. 1 is a partially sectional side view showing an embodiment of a seat belt sliding anchoring structure according to the present invention;

FIGS. 2A and 2B are a plan view and a side view showing an adjuster rail and a slider having a seat belt slidable anchoring structure of the embodiment.

FIG. 3 is a rear end view seen from line AA of FIG. 2;

FIG. 4 is a sectional view taken along the line BB of FIG. 2;

5A is a plan view showing a cover of a rear end connecting portion of the adjuster rail, FIG. 5B is a side view of the same, and FIG. 5C is a cross-sectional view taken along line DD of FIG.

FIG. 6 is a side view showing the operation of the adjuster rail and the slider of the embodiment at the time of a vehicle collision accident.

FIG. 7 is a perspective view of the entire seat of the embodiment.

8 (a) and (b) are a plan view and a side view of an adjuster rail and a slider showing another embodiment of the seat belt slidable anchoring structure of the present invention.

FIG. 9 is a side view showing the operation of the adjuster rail and the slider of the embodiment at the time of a vehicle collision accident.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Seat, 2 ... Seat cushion, 6 ... Seat slide device, 6 ... Car body floor part, 11 ... Seat belt, 11a
… Anchor, 20, 40… adjuster rail, 20d,
40d: locking teeth, 30: slider, 33c: lower part (locking pin).

Claims (1)

(57) [Scope of request for utility model registration] An adjuster rail, which is long in the front-rear direction and has locking teeth on the lower side, is attached to an upper part of a floor surface of a vehicle body on which a seat is installed so as to be slidable in the front-rear direction. The belt anchor is connected and can slide back and forth with the seat with respect to the adjuster rail in normal times, and engages with the locking teeth of the adjuster rail when a strong forward diagonal upward pulling force acts from the seat belt in a collision accident or the like. In the seat belt sliding anchoring structure provided with a slider for preventing movement, the adjuster rail may be configured such that its front end is free, and the front end side is in the left-right direction of the vehicle body and on the vehicle body.
The rear end can be swung so that it can be displaced downward.
A seat belt slide-type anchoring structure, which is attached to the surface .