JPH0528762U - Anchor plate for seat belt - Google Patents

Abstract

(57) [Abstract] [Purpose] When the shape and structure of the webbing insertion hole of the anchor plate for seat belts are connected by inserting the webbing, both the webbing and the anchor plate easily break even if an excessive load is applied. Try not to. [Structure] An arc-shaped tongue portion 7 whose width gradually increases from both ends to a central portion is bent and formed on an inner peripheral edge 4 of a long hole 2 through which the webbing 11 is inserted, on the side where the webbing 11 is pulled, and the tongue portion 7 is formed. The webbing 11 was in sliding contact to distribute the load.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an anchor plate for a seat belt in a safety belt device for a vehicle such as an automobile.

[0002]

[Prior Art]

 Generally, in a safety belt device, a retractor fixed to the vehicle body rotatably supports a take-up shaft and a take-up reel, and an inner end portion of a webbing is connected to the take-up shaft to take-up / draw on a take-up reel. The webbing is wound as much as possible, and the outer end of the webbing is fixed to the vehicle body with a seat belt anchor. An anchor for a seat belt is composed of an anchor plate and an anchor bolt for tightening and fixing the anchor plate to a vehicle body, and the anchor plate is usually a substantially triangular metal plate having a substantially triangular plate with an anchor bolt insertion hole. It is a press-molded product having a long hole through which a webbing is inserted (see, for example, Japanese Utility Model Laid-Open No. 56-98253).

However, an anchor plate formed by punching out a metal plate is connected by inserting a webbing into the long hole, and if an excessive load is applied, it may cause punching burr on the inner peripheral edge of the long hole. The webbing may be worn and cut. In order to solve this, the corner of the inner peripheral edge of the long hole is rounded, or the inner peripheral edge is raised to form a rounded corner (see Japanese Utility Model Laid-Open No. 59-77409), or A protector is formed on the inner peripheral edge of the hole (see Japanese Utility Model Laid-Open No. 56-26158).

[0004]

[Problems to be solved by the device]

 However, according to the above-mentioned conventional example, when an excessive load is applied to the webbing, the webbing is made of a soft material, so that the tensile load is concentrated in the center of the long hole on the side where the webbing is pulled and the center of the long hole is concentrated. The part is deformed. As a result, a strong tensile load is applied to the webbing at both ends of the slot, and the webbing is broken beyond the limit of elongation, and in some cases, the inner peripheral edge of the slot is broken.

In view of this, the present invention focuses on the long hole through which the webbing is inserted and devises its shape and structure for the purpose of eliminating the above-mentioned drawbacks.

[0006]

[Means for Solving the Problems]

 The seatbelt anchor plate according to the present invention is formed by bending an arc-shaped tongue portion whose width gradually increases from both ends to the central portion at the inner peripheral edge of the long hole through which the webbing is inserted on the side where the webbing is pulled. The feature is that the webbing is in sliding contact with the part.

[0007]

[Action]

 According to this invention, when an excessive load is applied to the webbing, the shape of the tongue prevents deformation of the long hole, and the deformation of the long hole prevents a concentrated load from being applied to both ends of the long hole. In addition to improving the strength of the anchor plate.

[0008]

【Example】

 An embodiment of this invention will be described below. FIG. 1 is a rear view and FIG. 2 is a vertical side view. This is a modification of an elliptical hole having an inner peripheral edge 4 parallel to the bottom portion 3 of the flange portion 8 which is bent and formed on the peripheral edge, and an arcuate inner peripheral edge 5 facing the inner peripheral edge 4, and the inner peripheral edges 4, 5 are The flange portion 6 is formed by continuously bending up, and in particular, the flange portion 6 of the inner peripheral edge 4 is formed as a tongue portion 7 that extends in an arc shape parallel to the main body 1a toward the bottom portion 3 side.

The shape of the tongue 7 is such that the length of the tongue 7 becomes longer in proportion to the stress distribution applied to the webbing 11 toward the center of the webbing receiving width. Therefore, the width W of the central portion of the tongue portion 7 is wide enough to reach the bottom portion 3, is converged by both sleeve portions, and continues to the flange portion 6 of the inner peripheral edge 5. Therefore, when the webbing 11 is inserted into the long hole 2 and connected, the tongue portion 7 is brought into sliding contact with the webbing 11. In addition, the inner peripheral edge of the bolt insertion hole 9 is also formed in the flange portion 10 which is bent and formed.

Therefore, when the outer end portion of the webbing 11 is inserted into the elongated hole 2 and connected, and when an excessive load is applied to the webbing 11, stress concentration occurs in the substantially central portion of the inner peripheral edge 4, as shown in FIG. As shown in FIG. 1, the main body 1a and the tongue portion 7 are integrated in a double structure on the inner peripheral edge 4 side, and the tongue portion 7 has a predetermined width W, so that it can withstand an excessive load. Since the deformation is prevented and the force is distributed to the converged sleeves, the elongated hole 2 is held without being deformed.

[0011]

[Effect of the device]

 According to the present invention described above, when an excessive load is applied to the webbing, stress concentration at the easily deformable portion of the anchor plate is avoided and the stress is distributed to both sleeves of the anchor plate. The distribution of the load received is widened, and the long holes are not deformed, so that the webbing and the long holes can be prevented from breaking. Further, since the tongue portion is bent and formed on the inner peripheral edge of the long hole to reinforce, the anchor plate can be formed with a relatively thin plate, and the weight can be reduced.

[Brief description of drawings]

FIG. 1 is a rear view of an anchor plate according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

1 ... Anchor plate, 2 ... Long hole, 3 ... Bottom part, 4, 5
... Inner peripheral edge, 6, 8, 10 ... Flange portion, 7 ... Tongue portion, 9 ...
Bolt insertion hole, 11 ... Webbing

Claims (1)

[Scope of utility model registration request] 1. An arc-shaped tongue portion having a width gradually increasing from both ends to a central portion is bent and formed on an inner peripheral edge of a long hole through which the webbing is inserted, on the side where the webbing is pulled, and the webbing is slidably contacted with the tongue portion. An anchor plate for seat belts characterized by the above.