JPH021424Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a door hinge for an automobile equipped with a passive belt device that automatically sets a safety belt when the door is opened or closed.

[Conventional technology]

Conventional automobile door hinges use a check cam to stop the door in three stages: closed, half-open, and fully open.
Publication No. 17858).

[The problem that the idea aims to solve]

However, when the above-mentioned conventional hinge device is applied to the door of an automobile equipped with the above-mentioned passive belt device, the belt load (pulling load from the retractor) during the door opening operation is added to the hinge load, so the door permissible load limit (ergonomics This causes a peak phenomenon that exceeds the allowable load limit for marketability (above), which poses a problem in terms of marketability. The present invention aims to solve this problem.

The spring means for offsetting the effect of the belt load on the door load described above was developed in U.S. Pat. No. 51-85918.
Although this is disclosed in the above publication, the structure is complicated and there are problems in relation to check cams for stopping each stage.

[Means and actions to solve the problem]

The present invention reduces the hinge load by improving the check cam that opens and closes the door in a moderate manner, and the door load, which is the sum of the belt load, is always set within the allowable load limit range.

〔Example〕

First, a conventional door hinge will be explained with reference to FIG. 1 is a hinge body on the vehicle body side, 2 is a door side hinge body, 3 is a hinge shaft, 4 is a check cam attached to the vehicle body side hinge body 1 with a shaft pin 5, and 6 is a spring between the vehicle body side hinge body 1 and the check cam 4. Uke 6 ₁ ,
6 is a cam spring provided through ₂ , and 7 is a check roller attached to the door side hinge body 2.

4a, 4b, and 4c indicate concave cams (cams concave in an arc shape, the same applies hereinafter) formed on the check cam 4 facing the check roller 7, and 4a indicates the door closed position 0°;
4b is formed approximately at the half-open position of the door at approximately 32 degrees, and 4c is formed approximately at the position approximately centered at the fully open position of the door at approximately 65 degrees, with cam ridges 4d at approximately 16 degrees and cam ridges 4e at approximately 45 degrees as the boundaries. Ru.

The hinge load curve H of the above-mentioned hinge with check cam is expressed as shown in FIG. The horizontal axis is the door opening angle, the vertical axis is the load, and L is the allowable load limit line L mentioned above.
shows.

When the door is opened, the movable hinge 2, which is in the closed position shown by the solid line in FIG.
, the check crawler 7 rotates the check cam 4 counterclockwise around the shaft pin 5 while compressing the spring 6, passes over the cam crest 4d, enters the next concave cam 4b, and moderately moves the check cam 4 to the half-open position. Stop at. When the door is further opened, the check roller 7 moves over the next cam ridge 4e to the fully open concave cam 4c position, and the spring 6 causes the concave cam 4c to press the roller 7 as shown by the chain line 4c' and return to the fully open position. keep.

For the above action, the first half of the cam surface (the fifth
The cam ridges 4d and 4a) act in a direction that promotes the opening action. The latter half of the cam surface (between 4e and 4e in FIG. 5) from the concave cam 4b until the check roller 7 crosses the cam ridge 4e acts in a direction that resists the opening action. Between the points A and B above (approximately 24° and 37° in the figure), the check crawler 7 is stopped only by the action.
At that time, the force compressed by the spring 6 is h4
It is expressed as

Also, while the check crawler 7 crosses the cam ridge 4e and reaches the point C with an opening angle of about 58 degrees, the fully open concave cam 4c
The area between the surfaces 4e and 4 promotes the opening action. The circle centered on the hinge axis 3 in FIG. 5, which connects these points A, B, and C, is the line of the door load O.

The hinge load curve H has large load peaks h1, h2, h at approximately 16° and 45° positions of the cam ridges 4d and 4e and at the fully open stop position of 65°, as shown by the dashed line in Fig. 6.
3. The above peak load h1,
h2 and h3 are designed to be within the allowable load limit L. Note that the load at the time of the door closing operation becomes a substantially opposite curve as shown by arrow a returning to FIG.

Next, an example of the above-mentioned passive belt device will be explained with reference to FIG.

Waist belt B with one end hung next to a chair inside the car
1. A retractor T for winding up the shoulder belt B2, holding members K and K1 for vertically guiding the belt, and holding member guide tracks R and R1 are provided on the inner surface of the door D.

Waist belt B is removed from retractor T by opening the door.
1. Pull back the shoulder belt B2, pull up the waist belt B1 using the holding member K and the track R, and remove the shoulder belt B2.
is also pulled up by the holding member K1 and the track R1 to form a space for getting in and out above the seat. When the door is closed, both belts are reeled back into the retractor T and fitted onto the occupant.

The load curve B of this type of passive belt is the 6th
It is represented as a dotted line curve in the figure. That is, the load reaches a peak value b1 near the door opening angle of about 25 degrees, and thereafter the load decreases with a gentle slope.

Therefore, when the above hinge device is applied to a door equipped with a passive belt device, the door load, which is the sum of the hinge load H and the belt load B, is represented by a solid curve D. That is, peaks such as d1, d2, and d3 occur at each position of the cam ridges 4d and 4e and the fully open concave cam 4c, and the allowable load limit L is greatly exceeded, causing a commercial problem.

Therefore, in the present invention, the check cam 4 is devised to reduce the hinge load H near the angular position where the peak of the door load D occurs, and the door load is always maintained within the allowable load limit L. It is.

The embodiment will be explained with reference to FIGS. 1 to 3. Note that the same parts as in the conventional example shown in FIGS. 5 and 6 are indicated by the same reference numerals.

When the passive belt built into the door is driven to form a passenger space by the door opening operation, the door opening angle position P (generally about 25 degrees) where the belt load B is maximum b1 as described above is abbreviated. The first half-open concave cam 4b1 centered on the closed position concave cam 4a
and are formed adjacent to each other on the check cam 4. In this case, the cam ridge 4f at the boundary between the double-concave cams 4a and 4b1 will be closer to the concave cam 4a by about 5 degrees than the cam ridge 4d of the conventional example shown in FIG. The intermediate angular position Q (approximately 45 degrees) between the concave cam 4b1 and the concave cam 4c at the door fully open position of 65 degrees
A second half-open concave cam 4b2 approximately centered at the check cam 4 is formed on the check cam 4.

With the above configuration, the hinge load H is
The door load, which is the sum of the belt load and the door load, is represented by curve D and is always kept within the allowable load limit L. Further, since the heights of the cam ridges 4f, 4g, and 4h are lower than those of the conventional example shown in FIG. 5, the hinge load H and the door load D are reduced in each part. 2 by the first and second concave cams 4b1 and 4b2.
Intermediate open positions can be obtained in a moderate manner.

In addition, in FIG. 1, the first half-open concave cam 4b1
The opening promoting surface 4f for the check roller 7
D. Surface H~4g that resists the opening action, Facilitating surface 4g~ of the second half-opening concave cam 4b2, F, Surface T~ that resists the opening action.
4h, the same promoting surfaces 4h to 1 of the fully open concave cam 4c,
The line of the door load O is a circle centered on the axis 3, which connects the points D, E, E, G, and J.

[Effect of idea]

As mentioned above, the door load of a door equipped with a passive belt device can always be set within the allowable load limit without using a spring for offsetting the belt load, etc., by using a simple configuration by modifying the conventional hinge check cam. This has the effect of making door operation easier. It is also convenient to have the door partially open at two positions, approximately 25° and 45°.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the door hinge of the present invention, Fig. 2 is a front view thereof, Fig. 3 is a diagram of the door load curve, Fig. 4 is a perspective view of a passive belt device to which the present invention is applied, and Fig. 5 is a conventional Top view of the door hinge, No. 6
The figure shows the door load curve. 1 and 2 are hinge bodies, 3 is a shaft, 4 is a check cam, 6 is a cam spring, 7 is a check crawler,
B1 and B2 are safety belts, 4a, 4b1, 4b
2 and 4c are concave cams, and 4f, 4g, and 4h are cam ridges.

Claims (1)

[Scope of Claim for Utility Model Registration] A swinging check cam provided on the hinge body on the vehicle body side and a check roller provided on the hinge body on the door side are installed opposite each other, and a cam spring is provided between the check cam and the hinge body on the vehicle body side. In this door hinge, the check cam includes a concave cam that holds the door in the closed position and a concave cam that holds the door in the fully open position.A passive belt built into the door forms a passenger space when the door is opened. When the belt is driven as shown in FIG. A door hinge for an automobile equipped with a passive belt device, characterized in that a half-open concave cam is formed as a check cam.