JPS6116151A - Seat belt anchor device - Google Patents

Abstract

PURPOSE:To prevent a seat from being separated from a floor surface due to a large load exerted to a seat belt, and to enhance the reliablity of the seat belt, by allowing the seat belt to be locked in two stages respectively upon light and heavy load operations. CONSTITUTION:An outer bracket 11 as a first locking member is pivotally attached to the rear section of a seat cushion 2 by means of a screw pin 12. An inner bracket 15 as a second locking member is arranged inside of the outer bracket 11 by means of a shaft pin 16 which is rotatably inserted in a shaft hole 14 in the outer bracket 11. A buckle 19 of a seat belt is pivotally attached to the front end part of the inner bracket 15 by means of a screw pin 20. A rod-like member 21 is pivotally attached to a reinforced part 3a, and is made pierce successively through through-holes 13a, 13b in the outer bracket 11 and through- holes 17a, 17b in the inner bracket 15.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a seat belt anchor device disposed on a vehicle seat.

BACKGROUND TECHNOLOGY AND PROBLEMS Conventionally, seats for vehicles such as automobiles are designed to restrain and hold the occupant in the seat to prevent the occupant from being thrown forward and sustaining injury to the body, especially the head, in the event of a collision. Seat belts are installed.

Conventionally, with this type of seatbelt, both ends of the seatbelt are fixed to the vehicle body, so it is not possible to adjust the seat by sliding it forward or backward while the seatbelt is attached. It is inconvenient to readjust the length of the seat belt each time, and in order to solve this problem, for example,
A seat belt device as disclosed in "Publication No. 1" has been proposed.

That is, this seatbelt device is a seat that can be adjusted in the longitudinal direction by a slide rail, and a seatbelt support member is rotatably attached to the seat, and is formed by penetrating the lower part of the support member in the longitudinal direction. An elongated member, one end of which is fixed to the vehicle body, is inserted through the inserted insertion portion, so that under normal conditions, the support member slides relative to the elongated member as the seat is adjusted to move back and forth. When a diagonally forward load is applied to the seatbelt due to a collision, etc., the support member is rotated in the direction of this load, and frictional resistance is generated between the opening edge of the insertion portion of the support member and the elongated member. The seat belt is configured to lock the seat belt and transfer the load to the elongated member.

However, according to this seat belt device, when a light load is applied, the rotation angle of the support member is small, so the frictional resistance against the elongated member is low, and the locking reaction is delayed. Since this is carried out at only two locations on the edge of the opening, when a heavy load is applied, the support member will unexpectedly move in the direction of the load relative to the elongated member, and as a result, the load will not be transmitted to the elongated member but directly from the support member. This has disadvantages in that it is unreliable, such as the possibility that the seat will be attached to the seat and the seat may separate from the vehicle body.

Purpose of the Invention The present invention has been made in view of the above-mentioned problems, and the locking operation of the seat belt is carried out in two stages, one under light load and one under heavy load, thereby improving responsiveness and reliability during emergency locking. The present invention aims to provide a seat belt anchor device that is designed to improve the safety of the vehicle.

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a first seat cushion having a longitudinal insertion hole on the side of a seat cushion of a seat arranged so as to be movable and adjustable in the longitudinal direction with respect to the floor side of the vehicle body. The locking member is pivotally mounted to be rotatable in the front-rear direction, and a second locking member located inside the first locking member and having an insertion hole in the front-rear direction is pivotally supported. The support member of the seat belt is connected to the locking member of the first locking member, and a rod-shaped member whose one end is supported on the vehicle body side and whose other end is extended in the movement adjustment direction of the seat is connected to the insertion hole of the first locking member and the first locking member. K is inserted continuously into the insertion hole of the second locking member, and locks the rod-shaped member in two stages by the first and second locking members.
By doing this, emergency locking can be performed quickly and reliably when a load is applied to the seatbelt, and most of the load is transmitted to the floor side via the rod-shaped member.

Example Embodiments of the apparatus of the present invention will be described below with reference to the drawings.

1 to 3 show a first embodiment of the present invention, and (1) in the figure shows a seat for a vehicle, and the seat cushion (2) of this seat (1) has a floor surface (3) on its lower surface side. ) side via a slide rail (4), and the seat (1) can be moved and adjusted in the front and rear directions by this slide rail (4).

A seat belt anchor device (101) according to the present invention is disposed on the negative side of the seat cushion (2) of the seat (1).

This seat belt anchor device (101) will be described in detail below.

At the rear of the negative side of the seat cushion (2), there is a T-shaped outer platen (fill) serving as a first locking member, which is rotated in the front-rear direction by a threaded pin (12) at the bottom of its vertical portion (lla). Both ends of the horizontal part (llb) of the outer racket αB are bent inward at right angles to form a bent part, and a rod-like member described later is inserted into this bent part. Holes (13a) and (13b) are bored facing each other, and a shaft hole α4 is bored in the center of this horizontal portion (llb).

Also, located inside this outer platen ill, an inverted T
The inner bracket (I5J) as the 20th locking member formed in a letter shape inserts the shaft pin (161) bored in the center of its horizontal part (15a) into the shaft hole α4 of the outer platen l [11] and supports the shaft. This inner platen (151 is also an outer platen) (Similar to the lit, both ends of the horizontal part (15a) are bent inward to form a bent part. Insert holes (17a) (17b) in the bent part
) are bored facing each other.

A buckle αB, to which one end of the seatbelt αe is connected, is pivotally attached to the tip of the vertical portion (15b) of the inner bracket α9 so as to be rotatable in the front-rear direction by a screw pin ■.

In addition, the reinforcement point (3a) Ic located behind the seat (1) on the floor surface (3) is a long plate-shaped rod-shaped member Qυ, which is pivoted at one end (21a) so as to be freely rotatable in the vertical direction. This rod-shaped member is made of a material that can be plastically deformed, and its cross-sectional diameter is the insertion hole (13a) (13b) and (17a) (1
7b), or has a slightly smaller diameter. The other end (21b) side of this rod-shaped member Q1 is continuously inserted through the insertion holes (13a) (13b) of the outer platen (till) and the insertion holes (17a) (17b) of the inner platen 1451. . .

The seat belt anchor device of this example configured as described above has both brackets (
11) and a9 insertion holes (13a) (13b) and (
17a) (17b) is opposed along the longitudinal direction of the rod-shaped member (21+), and in this state, the seat (1) is adjusted by moving in the front and back direction with respect to the floor (3) side using the slide rail (4). And, along with this, the outer bracket αB
The seat (1) can be moved to a desired position without any hindrance (see the two-dot chain line in Figure 1).

Due to sudden stops, minor collisions, etc., occupants may
1) When tilted forward with respect to K, a light load is applied to the seat belt (18) diagonally forward (in the direction of arrow a in Fig. 3), and therefore the seat belt αa is connected via the buckle α9. The inner platen (15) rotates in the load direction, thereby opening the insertion hole (17a) (17
The lower edge of the insertion hole (17a) on the front side of Is is in such a state that the edge of b) abuts against the rod-shaped member and tightens it, that is, the inner platen with respect to the rod-shaped member Cυ. The upper edge of the rear insertion hole (17b) is in a crimped state, and due to this frictional resistance, the inner bracket (151) and the rod-shaped member (2υ
A light lock will be established between the
reference).

Furthermore, due to severe collisions, etc., the seat belt α
When a strong load is suddenly applied in the direction of arrow a, the inner bracket (151) is further rotated in the load direction from the above-mentioned locked state, and the rod-shaped member Qυ is bent by the rotational force of this inner bracket (151). As a result, the outer platen (Ill) also rotates in the direction of the load, and the edges of the insertion holes (13a) (13b) abut against the rod-shaped member and tighten it, that is, in this case, the third As shown in Fig.
It is necessary to tighten between the front insertion holes (13a) and (17a) and between the rear insertion holes (13b) and (17b) of 09, so the frictional resistance is extremely large. A very strong lock state will be set.

In this way, the seat belt anchor device of this example operates in the first initial lock state (Fig. 3B) in which it operates upon sensing a light load.
and a second lock state (third lock state) that is activated when a heavy load is applied.
Since the seatbelt (Figure C) is configured with a two-stage locking structure that is set in stages, it responds quickly when a load is applied to the seatbelt (C1), and when a heavy load is applied. Since the strong locking is performed, the seat belt a is securely locked to the rod-shaped member Qυ, and therefore the load on the seat (1) is transmitted from the rod-shaped member Qυ to the floor surface (3) side with almost no application. Therefore, the slide rail (41
The seat (1) will not be separated from the floor (3) due to the Vc peeling load, and the occupant will be safely restrained and held in the seat (1), ensuring reliability in the event of an emergency lock. is significantly improved.

4 to 5 show a second embodiment of the present invention, and the same members as in the first embodiment described above are denoted by the same reference numerals. A6 serves as a 20th locking member, and inserts a lock pin O2 having an insertion hole 011 in the front-rear direction between the shaft hole a of the outer bracket α6 and the shaft hole drilled in the side of the cushion frame (2). Support the arm member (2) integrally with this lock pin O3.
is fixed by welding or the like at one end thereof, and the buckle α9 is connected to the other end of this arm member (to) by means of a screw pin ■, and the insertion hole (13a) of the outer bracket a6 is
13tr) and the insertion hole r3]) for the lock pin O3, and a rod-shaped member (26) having a circular cross section is inserted therethrough.

The seat belt anchor device (16) of this example configured as described above locks integrally with the arm member (goods) when a light load is applied diagonally forward (in the direction of arrow 8 in Fig. 5) to the seat belt (18). The pin 07J is rotated and the opening edges at both ends of the insertion hole C311 are tightened against the rod-shaped member, thereby setting the initial lock state (see Fig. 5A), and further tightening the seatbelt. ) When a strong load is applied to Q8, the tensile force causes the end of the lock pin 0 to break, and as a result, the outer bracket (16) rotates in the direction of the load, and its insertion hole (13a) ( The rod-shaped member (2
6 tightening is performed (see FIG. 5B). In this case, since the lock pins G are broken, the outer bracket α6 is significantly rotated in the direction of the load, so the frictional resistance due to tightening against the bar member 06 further increases, and the locking is performed more reliably. This is K.

In this way, in this example as well, the rod-shaped member (2) is locked in two stages, so the response when a load is applied to the seatbelt QFj is quick, and the locking is ensured when a heavy load is applied. seat bell) (
The load applied by 18 is reliably transmitted to the floor side via the rod-shaped member.

Incidentally, in each of the above embodiments, a bar member formed into a long plate with a rectangular cross section or a columnar member with a circular cross section is used as the rod member. As shown in the figure, a toothed rod-shaped member c! Hair may also be used. In this case, when a load is applied to the seat belt (18) and the outer bracket αB or inner platen (151, etc.) is rotated, the edge of its insertion hole will engage with the uneven part. This ensures a more reliable lock.

Furthermore, the rod-shaped member may be made of a flexible material such as a hard wire.

Effects of the Invention As described above, according to the seat belt anchor device of the present invention, the locking operation of the seat belt is performed in two stages: when a light load is applied and when a heavy load is applied. When a heavy load is applied, the seatbelt responds quickly and locks strongly when a heavy load is applied, so the seatbelt is securely locked to the rod-shaped member, and the load is transferred from the rod-shaped member to the floor side, and the seat belt is securely locked against the rod-shaped member. Since almost no load is applied to the seat, the seat will not separate from the floor due to the load, the occupant will be safely restrained in the seat, and reliability in the event of an emergency lock will be greatly improved. It has the effect of

[Brief explanation of drawings]

Fig. 1 is a side view of a vehicle seat equipped with the device of the present invention;
The figures are an exploded perspective view showing the first embodiment of the device of the present invention;
4 is an exploded perspective view showing the second embodiment of the device of the present invention, FIGS. 5A and B are illustrative diagrams of the operation, and FIG. 6 is a rod-shaped It is a perspective view of the other side of a member. In the diagram, (1) is the seat, (2) is the seat cushion, (3)
is the floor surface -11α11a6 is the outer bracket as the 10th locking member, (13a) (13b) and (13a)
(13b') is an insertion hole, (151 and 02 are an inner bracket and lock pin as a second locking member, (17a)
) (17b) and C311 are insertion holes, αQ is a seat belt, a! J is a buckle as a support member, Fig. 2, Fig. 4, Fig. 6, Fig. 5.

Claims (1)

[Claims] A first locking member having a longitudinal insertion hole is rotatably pivoted in the longitudinal direction on the side of a seat cushion of a seat arranged so as to be movable and adjustable in the longitudinal direction with respect to the floor side of the vehicle body. ,
A second locking member located inside the first locking member and having a longitudinal insertion hole is pivotally supported, and a seat belt support member is connected to the second locking member, and A rod-shaped member having one end supported by the vehicle body and the other end extending in the movement adjustment direction of the seat is connected to the insertion hole of the first locking member and the insertion hole of the second locking member. A seat belt anchor device that is inserted through the seat belt.