JPS59134031A - Seat adjuster for belt fitting - Google Patents

Abstract

PURPOSE:To prevent a seat adjuster for belt fitting from being locally deformed, by installing an auxiliary device which stops the rotation between an upper frame and a belt anchor bracket. CONSTITUTION:When receiving strong force in F direction, a belt anchor bracket 7 receives reaction force in R direction in consequence. This reaction force R acts on a nut member 10 as turning moment in a clockwise direction, causing the bracket 7 to free its rotation, making it separate from a binding part by means of a small projection 7a and an openwork hole 6a. The bracket 7 being set free of rotation turns round till its turning moment produced by contact force with a lower frame 9 comes into a state of being balanced and then supports the tension of a seat belt. Therefore, a U-shaped opposite part between the bracket 7 and the lower frame 9 is uniformly made contact extending over the full length so that seat belt tension is dispersedly supported, thus no concentrated load is imposed on A part.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat adjuster configured to attach a seat belt.

FIG. 1 is a plan view of a conventional seat adjuster for incorporating a seat belt, FIG. 2 is a side view of the same, and FIG. 3 is an end view of the same.

1 is a lower rail fixed to the floor of a single room.

Reference numeral 2 denotes an upper rail, which is slidably guided by the lower rail 1 via rollers 3 and pawls 4. A sheet (not shown) is supported by the upper rail 2, and a means 5 for locking the sliding thereof is provided.
C) It is designed to be able to move freely in the front and rear directions and to be fixed at any position.

An upper frame 6 is fixed to the upper rail 2, and a belt anchor bracket 7 is welded to the upper frame 6. A belt anchor (both not shown) attached to one end of the seat belt is pivoted to a mounting portion 7c of the belt anchor bracket 7.

When four automobiles undergo rapid deceleration, such as when they collide with an obstacle, an impact load is applied to the seat belts. Figure 4 is a schematic diagram showing the outline of the belt anchor test.
The inertial loads P, , P, exert tension on the belt anchor bracket 7 via the belt anchor 8. The above tension is applied in the direction of arrow F in Fig. 2 and in the direction of arrow F' in Fig. 3.
acts in the direction of P3 is the inertia load of the seat pack,
This is a smaller value than the above P, , P2.

In order to prevent the upper rail 2 from being torn off from the lower rail 1 due to the above-mentioned shocking tension, the lower end of the belt anchor bracket 7 is folded back into a t-U shape and fixed to the vehicle body as shown in Fig. 3. The upper end of the lower frame 9 is folded back in a U-shape, and both folded parts are spaced apart from each other.

When a strong impact load that causes the upper frame 6 to bend is applied to the seat belt, the above U-shaped folded portion comes into contact and supports the tension, but if the tension is extremely large, the solid line in Fig. 5 The U-shaped folded portion is deformed as shown in . If we look at these deformations in Figure 2, we can see that the tension arrow F
Deformation occurs concentrated in the vicinity A near the line of action. As shown, belt anchor bracket 7 and lower frame 9
Although the length of the part facing the A part is L, the load is not distributed over this whole area and is concentrated only in the A part, so that only the A part is deformed.

If the deformation occurs concentrated in the A section as shown in FIG. 5, the sliding movement of the upper rail 2 will be obstructed, resulting in a problem that the passenger in the rear seat will not be able to escape.

The present invention has been made in view of the above-mentioned circumstances, and when the belt anchor is subjected to strong tension, the U-shaped retaining portion between the belt anchor bracket and the lower frame abuts uniformly over the entire length, distributing the load. An object of the present invention is to provide a seat adjuster for incorporating a belt that can prevent local hairdos.

In order to achieve the above object, the seat adjuster of the present invention is configured such that a belt anchor bracket is attached to the upper frame fixed to the upper rail, and the seat belt is assembled via the belt anchor, and In the seat adjuster, the lower end part is completely folded upward, and the upper end part of the lower 7 frame fixed to the lower rail is folded back downward, and the folded parts of both of the above members are made to face each other to constitute a detachment prevention means. The belt anchor bracket and the belt anchor are rotatably attached to each other, and an auxiliary means for locking the rotation of the upper frame and the belt anchor bracket is provided, and a large impact load is applied to the seat belt VC. The invention is characterized in that when the rotation locking auxiliary means is disengaged, the belt anchor flaket can be rotated relative to the upper frame.

Next, one embodiment of the present invention will be described with reference to FIGS. 6 to 88. FIG. 6 is a plan view of the belt-integrated seat adjuster of the present invention, which corresponds to FIG. 1 of the conventional device;
Fig. 7 is a side view corresponding to Fig. 2, and Fig. 8 is a side view corresponding to Fig. 7.
FIG. 3 is a sectional view taken along B-C-D-B in the figure and corresponds to FIG. 3 of the conventional device.

In this embodiment, a flanged bush-like nut member lO
On the other hand, the belt anchor bracket 7 and the upper frame 6 are provided with holes for fitting the nut member 10, respectively, and the nut member 10 is inserted thereinto, and the flange portion of the nut member IO is welded to the upper frame 6. to prevent rotation. Further, a mounting hole 8a is formed in the belt anchor 8 attached to one end of the seat belt 11, the nut member 10 is fitted onto the belt anchor 8, and the belt anchor 8 is pressed down with a mounting pin 12.

In this embodiment, the belt anchor 8, the belt anchor bracket 7, and the upper frame 6 are rotatably attached to each other by pressure as described above, and furthermore, the rotation of the belt anchor bracket 7 and the upper frame 6 is prevented. As an auxiliary means for locking, a small protrusion 7a' is formed on the belt anchor bracket 7 by punching it out with a press, and a through hole 6a is drilled in the upper frame 6 to correspond to this, and the small protrusion 7a is formed through the hole. It is a shallow fit to 6a.

When carrying out the present invention, the auxiliary means for locking the rotation is not limited to the small protrusions and through holes as in this example, but includes, for example, relatively small diameter rivets, bolt nets made of relatively soft material, etc. A member that is easily sheared may also be used. Mourning is
It may be constructed so that it performs a rotation locking action under normal usage conditions, and detaches or breaks when receiving an abnormal impact force to permit rotation.

When the seat adjuster configured as described above is subjected to a strong force in the direction of arrow F shown in FIG. Area A close to is in strong contact. Since the lower frame 9 is attached to the vehicle body side and strongly supported, the belt anchor bracket 7 receives a reaction force in the direction of arrow R.

This reaction force arrow R acts as a clockwise rotation moment on the nut member 10, disengaging the locking portion formed by the small protrusion 7a and the through hole 6a, and allowing the belt anchor bracket 7 to rotate freely. The freely rotatable anchor bracket 7 rotates in a state 1 in which the rotation moment generated by the contact force with the lower frame 9 is balanced, and fully supports the tension of the seat belt. Therefore, the U-shaped facing portions of the belt anchor bracket 7 and the lower frame 9 abut uniformly over their entire length, and the tension of the seat belt is supported in a dispersed manner, so that no concentrated load is generated on the A portion.

Therefore, there is no risk of local deformation occurring in the A section.

FIG. 9 is an exploded perspective view of an embodiment different from the above. In this example, a flange 1J10a, a prismatic surface 10b, and a cylindrical surface 10c are concentrically connected to the nut member 10, and a square hole 6b is bored in the upper frame 6, and a round hole 7b is bored in the belt anchor bracket 7. When constructed in this way and assembled by fitting the square columnar surface 10b into the square hole 6b, the nut member 10fc can be attached without welding to the upper frame 6. There is no risk that 10 will rotate together.

As detailed above, according to the present invention, when a strong tension is applied to the belt anchor bracket, the U-shaped retaining portion, which is a means to prevent the belt anchor bracket from separating from the lower frame, abuts uniformly over the entire length. Distributes the load and eliminates the risk of local deformation.

[Brief explanation of the drawing]

1 to 3 show a conventional seat adjuster for assembling a belt, in which FIG. 1 is a plan view, FIG. 2 is a side view, and FIG. 3 is an end view. FIG. 4 is a layer for explaining the inertial force applied to the seat belt, and FIG. 5 is an explanatory diagram of a deformed state of a conventional seat adjuster for incorporating the belt. FIG. 6 to FIG. 8 show an embodiment of the seat adjuster for flattening of the present invention,
FIG. 6 is a plan view, FIG. 7 is a side view, and FIG. 8 is an end view partially exploded and partially shown as a cross section. Figure '#J9 is a partially exploded perspective view of an embodiment different from the above. 1 Lower rail, 2 Upper rail, 6 Upper frame, 6a, through hole, 6b square hole, 7 Belt anchor bracket, 7a small protrusion, 7b round hole, 8 Belt anchor, 8 a installation ratio, 9 Lower 7L/-m, 10 Nut member, 10a flange part, 10b prismatic surface, 10c
Cylindrical surface, 11 seat belt, 12 command] Pol
to . Patent applicant Ichikoh Industries Co., Ltd. Agent Patent attorney Tomomi Akimoto Figure 3 Figure 4

Claims (1)

[Claims] The upper frame second anchor bracket fixed to the upper rail was attached, and the seat belt was attached via the belt anchor, and the lower end of the upper frame was folded upward and fixed to the lower rail. In a notebook Asia star in which the upper end of the lower frame is folded downward and the folded parts of both of the above members face each other to constitute a detachment prevention means, the upper frame of the upper frame, the belt anchor bracket, and the belt anchor are mutually rotated. An auxiliary means for freely pivoting and locking rotation between the upper frame and the belt anchor bracket is provided, and the auxiliary means for locking the rotation is released when a large impact load is applied to the seat belt. A seat adjuster for incorporating a belt, characterized in that the belt anoka bracket can be rotated with respect to the upper frame.