JPH0341961Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is an improvement of an anchor device equipped with an annular through-ring member that slidably inserts and turns a seatbelt installed in an automobile, etc. The present invention relates to the anchor device that prevents the so-called jamming phenomenon, which is a phenomenon in which the seatbelt insertion portion deflects and converges within the through ring member when the maximum load is applied, and thereby avoids unexpected situations such as seatbelt breakage. .

In general, a conventional seat belt device connects a through ring member 1 to an anchor bolt 2, as shown in FIG.
The through ring member 1 is rotatably attached to a fixed strength member 3 such as a center pillar of a vehicle body using a
A seat belt 6 pulled upward from a retractor 5 is slidably inserted into the annular portion 4 of the seat belt 4, and is turned diagonally forward and downward to lead to the occupant restraint position.

However, in the anchor device having such a conventional structure, when a vehicle crashes, an impact load is applied to the seat belt 6 as shown in FIG.
When this occurs, the through ring member 1, which was tilted in the angle θ/2 direction when the belt is normally worn, changes in the tension direction of the seat belt 6 due to the movement of the occupant's shoulder, or slightly stretches the seat belt 6. As a result, the seat belt 6 rotates in the direction of the arrow X or Y, and the seat belt 6 causes sideways slip within the annular portion 4 and becomes biased and focused, causing a so-called jamming phenomenon, where stress is concentrated locally, and there is a risk of breakage at that part. It had (See Figure 2) In order to overcome the problem of cutting the seat belt webbing due to the jamming phenomenon, the hole shape of the annular portion 4 of the through ring member 1 is made into an arc shape centered on the anchor bolt 2. (See Japanese Utility Model Publication No. 53-20730 or Japanese Utility Model Application Publication No. 53-84829), and one in which the rotation angle of the through ring member 1 is limited to a predetermined range (see Japanese Utility Model Publication No. 56-2996) has been proposed. However, in the former case, since the seatbelt contact surface of the through ring member 1 has an arc shape, the tension applied to the seatbelt 6 is uneven in the width direction, and tensile stress is generated particularly at both side edges. On the other hand, in the latter case, since the rotation range of the through ring member 1 is predefined, the jamming phenomenon occurs only when this matches the load direction at the time of a collision. However, the belt load direction at the time of a collision generally differs depending on the sitting height, physique, weight, etc. of the occupant, and if the load direction and the stopping angle of the through ring member 1 do not match, There was a concern that the through ring member 1 would cause a jamming phenomenon within its rotation range.

The present invention focuses on the problem of seatbelt webbing being cut due to the occurrence of the jamming phenomenon that conventional anchor devices had.When the maximum load is applied to the seatbelt due to a vehicle collision, etc., the present invention has been developed to The purpose is to prevent the jamming phenomenon by fixing the through ring member at the current angle so that the force in the along direction is minimized and preventing free rotation of the through ring member.

That is, the present invention includes a through-ring member that includes an annular portion through which a seat belt is slidably inserted and a plate portion that holds the annular portion, and a plate portion of the through-ring member that is rotatable to a fixed strength member of a vehicle body. a mounting member fixedly connected to the plate portion; the mounting member includes a shaft having one end fixed to the plate portion; a plate-shaped stay provided with a through hole through which the shaft is rotatably and slidably inserted; a first blocking member fixed to the other end of the shaft and having a chrysanthemum seat surface on a surface facing the stay; and a chrysanthemum seat fixed to the stay and detachable from the chrysanthemum seat surface of the first blocking member. A second blocking member having a seat surface, and a spring that is compressed between the stay and the first blocking member and biases the first blocking member in a direction to move the first blocking member away from the second blocking member. and the stay, the first
The blocking member, the spring, and the second blocking member are assembled by passing through the shaft in that order, and the stay has bolt holes on both sides thereof for bolting to a fixed strength member of the vehicle body. It is characterized by:

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

FIG. 3 is an exploded perspective view of the anchor device according to the present invention, and FIG. 4 is a plan view showing how the anchor device is attached.

In each of these figures, 10 is a fixed strength member such as a center pillar of an automobile, and 12 is bolt holes 11 and 1 drilled on both sides of the fixed strength member 10.
1 is a stay with a cross-section shaped like a square, which is fixed by inserting bolts 13, 13 into the stay 12; 14 is a shaft which is rotatably and slidably inserted into a through hole 15 bored in the central plate portion 12a of the stay 12; 16 is seat belt 17
The through ring member 16 is composed of an annular portion 18 that is inserted through the annular portion 18 and a plate portion 19 that suspends the annular portion 18. Fits into a prismatic portion 14a formed at the end on the indoor side,
A male threaded portion 1 is formed continuously on the prismatic portion 14a.
It is fixed to the shaft 14 by screwing a seat nut 21 onto the shaft 14.

On the other hand, 22 is a plate-shaped second blocking member attached to the back surface of the stay 12 and fixed at the four corners with a plurality of screws 23.
has a shaft insertion hole 24 having the same diameter as the through hole 15 of the stay 12 in the center thereof, and a large number of shaft insertion holes 24 extending in the radial direction on the circumferential surface of the shaft insertion hole 24 on the side opposite to the side attached to the stay 12. It has a chrysanthemum seat surface 25 constituted by uneven stripes.

Further, 26 is the chrysanthemum seat surface 2 of the second blocking member 22.
5, the first blocking member 26 is provided with a chrysanthemum seat surface 27 having a shape capable of fitting with the chrysanthemum seat surface 25 on the surface facing the stay 12, and the first blocking member 26 A prismatic portion 4c formed on the other end side of the shaft 14 inserted into the shaft insertion hole 24 of the member 22
At the same time, the nut 2 is fitted into the male threaded portion 14d of the shaft 14.
It is fixed to the shaft 14 by screwing 9.

Furthermore, between the first blocking member 26 and the second blocking member 22, 30 includes a chrysanthemum seat surface 25 of both members,
The compression spring 30 is a compression spring provided on the outer periphery of the shaft 14 so as not to interfere with the first blocking member 27, and the compression spring 30 biases the first blocking member 26 away from the second blocking member 22, that is, in the direction of arrow U The spring constant prevents the first blocking member 26 and the second blocking member 22 from fitting while a normal belt load is applied to the through ring member 16, and prevents the through ring member from fitting. When the maximum load for restraining the occupant is applied to 16, the shaft 14 and the first blocking member 26 are compressed by the horizontal component force and are allowed to move in the direction of arrow v, and the first blocking member 26 The chrysanthemum seat surface 27 of the member 26 is set to fit with the chrysanthemum seat surface 25 of the second blocking member 22.

The stay 12 has legs 12b, 12b so that when the maximum load for restraining the occupant is applied to the through ring member 16, a component of the load acts largely along the axial direction of the shaft 14. One side is short and the other is long, so that the side surface of the central portion 12a is inclined obliquely forward by an angle α.

The anchor device of the present invention has the above-mentioned configuration, and its operation will be explained next. First, when the seat belt is not worn and when the belt is normally worn, a large load is applied to the through ring member 16. While the force in the axial direction (direction v) acting on the shaft 14 is smaller than the biasing force of the compression spring, the shaft 14 and the first blocking member 26 are displaced in the direction of the arrow u by the spring 30, and the first Since the chrysanthemum seat surface 27 of the blocking member 26 is separated from the chrysanthemum seat surface 25 of the second blocking member 22, the through ring 16 freely rotates around the shaft 14 and follows the direction in which the seat belt 17 extends. do.

Next, when the seat belt is worn, when the maximum load is applied to the through ring member 16 due to a vehicle collision, etc., the spring 30 is applied to the through ring member 16 by the horizontal component force f of the maximum load along the axis of the shaft 14. compressed, the first blocking member 26
moves in the direction of arrow v and engages with the second blocking member 22, thereby preventing rotation of the shaft 14 and the through ring member 16 relative to the stay 12, and fixing them at the inclination angle at that point.

At this time, the seat belt 17 comes into contact with the annular portion 18 of the through-ring member 16 due to the forward movement and slight extension of the occupant's shoulder and attempts to cause a side-slip within the annular portion 18; The member 16 stops at the position receiving the maximum load,
Since the rotation is prevented, the occurrence of jamming phenomenon between the two is suppressed, and the seat belt 17 is prevented from rotating.
The load is distributed over the entire width of the contact area between the annular portion 18 and the seat belt 17, thereby preventing the seat belt 17 from being cut due to stress concentration.

In addition, in the above embodiment, the stay 12 and the second blocking member 22 are constructed separately, and both are connected with the screw 2.
3, the second blocking member 22
The manner of attachment is not particularly limited to this, and for example, it may be integrated with the stay 12 by means such as welding, or it may be attached directly to the back surface of the stay 12.
It is also possible to form a chrysanthemum seat surface similar to the chrysanthemum seat surface 25 of the blocking member 22.

As described above, the anchor device of the present invention stops the through-anchor member for inserting and turning the seat belt at the angle of inclination at the time when the maximum load is applied due to a collision, etc., thereby preventing the seat belt from rotating. When the seat belt is not worn and when the seat belt is normally worn, the through ring member is allowed to rotate freely and can follow the direction in which the seat belt extends. The seat belt is tilted at an angle that suits the body physique to smoothly guide the seat belt, maintaining the occupant's restraint in a good condition, and once the maximum load is applied to the through ring member due to a vehicle collision, etc., the maximum load is applied to the through ring member. When activated, the jamming phenomenon is prevented, the load is distributed over the entire width of the seatbelt, and the seatbelt is prevented from breaking due to stress concentration, which is an excellent effect. Moreover, since the first and second blocking members of the device of the present invention are chrysanthemum bearing surfaces with a large number of triangular teeth that fit into and out of each other, they can be engaged reliably at any rotational position, and the chrysanthemum seat has a large number of teeth, and by engaging with this large number of teeth, a fine pitch can be obtained, there is no influence from the posture of the bolt head, and the triangular teeth prevent the bolt from running over or jumping over. This greatly contributes to improving the safety of seat belt devices.

[Brief explanation of drawings]

Fig. 1 is a front view showing a seatbelt supported state by a conventional anchor device, Fig. 2 is a front view showing a state when a jamming phenomenon occurs in the conventional anchor device, and Fig. 3 is an implementation of the anchor device of the present invention. FIG. 4 is an exploded perspective view showing an example, and FIG. 4 is a plan view showing the installed state of the device. 10... Fixed strength member, 11... Bolt hole, 1
2... Stay, 14... Shaft, 15... Through hole, 16... Thru ring member, 17... Seat belt, 22... Second blocking member, 25... Chrysanthemum seat surface, 26... First blocking Member, 27... Chrysanthemum seat surface, 3
0...Spring.

Claims (1)

[Claims for Utility Model Registration] 1. A through-ring member having an annular portion through which a seat belt is slidably inserted and a plate portion for holding the annular portion, and a strength member for fixing the plate portion of the through-ring member to a vehicle body. a mounting member rotatably fixedly connected to the plate portion, the mounting member having one end fixed to the plate portion;
a plate-shaped stay with a through hole that is rotatably and slidably inserted through the shaft; and a chrysanthemum seat surface that is fixed to the other end of the shaft and has a large number of triangular teeth on the surface facing the stay. a first blocking member, which is fixed to the stay, has a large number of triangular teeth corresponding to the chrysanthemum seating surface of the first blocking member, and has a chrysanthemum seating surface that can be fitted into and removed from the first blocking member; a spring that is compressed between the stay and the first blocking member and biases the first blocking member away from the second blocking member; , the spring and the second blocking member are assembled by being inserted into the shaft in that order, and the stay has bolt holes on both sides thereof for bolting to a fixed strength member of the vehicle body. Seat belt anchor device. 2. The seat belt anchor device according to claim 1, wherein the seat surface of the second blocking member is integrally formed with the stay. 3. The seat belt anchor device according to claim 1, wherein the shaft is supported in an inclined state with its axis facing obliquely forward on the seat belt extension side.