JPS5913146Y2 - Automotive door opening/closing device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an automobile door opening/closing device.

Conventionally, commonly used automobile doors have a vertical hinge near the front edge, and are most often opened and closed by rotating on this hinge. A type of sliding door is also used in which a slide rail is provided on the door and a roller attached to the tip of an arm pivotally connected to the door or its extension is guided by the slide rail and slides.

The former has a simple structure, is robust, and tends to be inexpensive, but on the other hand,
In order to obtain a sufficient degree of opening, a large space is required on the side, and in places where the side space of the car is narrow or in parking lots, the door cannot be opened sufficiently, and if you try to open it forcefully, the door may hit an obstacle. There were drawbacks such as the risk of scratches.

Although the latter requires almost no side space to open and does not have the disadvantages of the former, for example, when a passenger car uses a door with a thick structure, such a sliding door type It was difficult to do so.

The present invention was made in order to eliminate the drawbacks of the above-mentioned conventional technology, and it can be fully opened without requiring a large space on the side.
Moreover, it is an object of the present invention to provide an automobile r-ar opening/closing device that can be easily applied to all kinds of automobiles including passenger cars.

In order to achieve this objective, the automobile door opening/closing device of the present invention includes a first arm having one end pivotally connected to the vehicle body, and the other end of the first arm being pivotally connected to the one end and the other end of the first arm being pivotally connected to the vehicle body. a second arm which is pivotally connected to the door; a third arm which is substantially along the first arm and whose one end is pivotally connected to the second arm;
a fourth arm pivotally connected to the other end of the arm and the first arm; a roller provided at a pivot point between the fourth arm and the third arm; and a connection of the second arm to the door. The roller is provided with a guide cam groove that guides the roller so that the point moves outward from the vehicle body in a generally arcuate trajectory and then traces a trajectory substantially along the side surface of the vehicle body.

The present invention will be described below with reference to embodiments shown in the accompanying drawings.

1, 2, and 6 show a first embodiment of the present invention. In this embodiment, the movement of the connection point between the four-bar link consisting of the first to fourth arms and the automobile door is shown. The trajectory,
This is achieved by a guide cam groove that has a similar shape.

In this embodiment, a hinge portion 2 is provided on the body side near the front edge of the opening of a door 1 of an automobile, and a first arm 5 of a two-stage arm 4 is pivotally supported at a pivot point 3.

The second arm 7 of the two-stage arm 4 is connected at one end to the first arm 5 by an intermediate shaft 6, and at the other end is connected to the inside of the door 1 substantially at the center by a shaft 8.

Therefore, one end of the two-stage arm 4 is pivotally connected to the body side of the sentry vehicle through the pivot point 3, and the other end is pivotally connected to the door 1 through the shaft 8.

The first arm 5 has an extension 5a extending beyond the pivot point 3 as a part thereof, and the second arm 7 also has an extension 7a extending beyond the connection point 6 with the first arm 5.

When the length of the first arm 5 is a, the length of the second arm is b, the length of the extension part 5a is C1, the length of the extension part 7a is d,
The configuration is such that Cl3 and d/b have the same value.

A fourth arm 11 is pivotally attached to the end of the extension 5a of the first arm 5 by a shaft 9, and a third arm 12, which is longer than the fourth arm 11, is attached to the end of the extension 7a of the second arm 7. is axis 10
It is pivoted on.

Further, the ends of the fourth arm 11 and the third arm 12 are pivotally connected to each other by a shaft 13.

In that case, the length of the fourth arm 11 is d, and the length of the third arm 12 is a+c.

Therefore, the four axes 6. 9. The first connecting 13°10
Arm 5 and extension portion 5a, fourth arm 11. The third arm 12 and the extension 7a of the second arm 7 always form a parallelogram.

A cam roller 14 is pivotally attached to the upper or lower extension of the shaft 13 that connects the fourth arm 11 and the third arm 12, and this cam roller 14 is fitted into a guide portion of a guide cam groove 15 provided as an extension from the body of the automobile. Fitted and guided.

In that case, the four axes 6. 9.13.10 always forms a parallelogram as described above, and is located at the position of the axis 13 on the opposite side of the axis 8 with the pivot point 3 as the center, and the distance from the pivot point 3 is c as described above. The ratio is the same as /a=d/b.

Therefore, the movement trajectory of the guide roller 14 and the movement trajectory of the shaft 8 (indicated by a dashed line in FIG. 2) are similar.

In this embodiment, as the shaft 8 moves along the movement trajectory shown in FIG. After that, the door 1 moves forward and backward along a near-straight motion trajectory, and the amount of lateral movement of the door 1 is kept to the minimum necessary.

Further, as shown in FIG. 1, a portion near the rear end of the lower edge of the door 1 is connected to one end of an arm 17 by a pin 16, and a roller 18 is connected to the arm 17 and the other end.

Further, an arm portion 1 extending perpendicularly to the arm 17 is provided.
A roller 20 is attached to the end of the roller 9, and both rollers 18
and 20 are fitted into guide grooves 21 formed on the side edges of the body floor or under the floor, and can move along the guide grooves 21.

This guide groove 21 regulates and restrains the movement locus of the rear portion of the door 1, similarly to the cam guide groove 15 for restraining the two-stage arm 4.

FIG. 3 shows the embodiment of the present invention shown in FIG. 2, in which the shape of the cam guide groove 15 for restraining the two-stage arm 4 is changed to the shape of the shaft 8 for connecting the two-stage arm 4 and the door. This is an example of a case where the motion trajectory is not similar.

In the case of this example, Cl3 is used as a substitute for d/b instead of c/a=d/b as in the examples shown in FIGS. They are substantially the same.

4 and 5 respectively show further embodiments of the invention, in which shafts 10 and 6, shafts 3 and 9, arms 12 and 5, shafts 13 and 9 are The cam guide groove 15 and the shaft fulcrum 3 are also arranged at different positions from those of the above embodiments.

That is, in these embodiments, the axes 9 and 10 are located in the middle of the arms 5 and 7, respectively, and the extensions 5a and 7a form part of the arms 5 and 7 from the middle to the ends.

Figure 4 shows the movement trajectory of the cam roller 14 and the movement trajectory of the shaft 8 (
(indicated by a dashed-dotted line) shows a case in which they are similar, and FIG. 5 shows a case in which they are dissimilar.

As explained above, according to the present invention, the automobile door initially moves slightly outward in an arc from the fully closed position, and then moves forward and backward in a near-straight trajectory to fully open. This has the advantage that the amount of lateral movement when opening and closing the door can be kept to a minimum and the door can be fully opened in a small lateral space, which is extremely useful especially when applied to passenger cars.

Further, since the two-stage arm is used as one of the door trajectory restraining means, only one special door trajectory restraining means is required, and the degree of freedom in the overall configuration and its design is increased.

In addition, smooth curves can be freely adopted as the movement trajectory of the automobile door, and problems such as sudden changes in the door movement direction during movement will not occur, and the shape of the guide cam groove that determines the door movement trajectory does not necessarily have to be similar to the door movement trajectory, and various different curves can be selected for the same door movement trajectory, providing a large degree of freedom in design.

Furthermore, the automobile door opening/closing device of the present invention can be installed on the indoor side of the body, and the various mechanisms will not be subject to wear due to harmful environments such as rain, water, mud, etc.

[Brief explanation of the drawing]

FIG. 1 is a top view showing a partial cross-section of the essential parts of an embodiment of an automobile door opening/closing device according to the present invention, FIG. 2 is an explanatory view showing details of its structure and operation, FIGS. Figure, 5th
The figures are explanatory views showing other embodiments of the present invention, and FIG. 6 is a perspective view showing the first embodiment. DESCRIPTION OF SYMBOLS 1... Automobile door, 3... Axis fulcrum, 4... Two-stage arm, 5... First arm, 5a... Extension part, 7...
...Second arm, 7a...Extension part, 11...Fourth arm, 12...Third arm, 13...Connection shaft,
14...Cam roller, 15...Guide cam groove.

Claims (1)

[Scope of utility model registration request] a first arm having one end pivotally attached to the vehicle body; a second arm having the other end pivotally attached to the one end and the other end pivoting to the door; and a second arm substantially along the first arm. and a third arm whose one end is pivotally connected to the second arm, a fourth arm whose other end is pivotally connected to the third arm and the first arm, and a connection between the fourth arm and the third arm. The roller provided at the pivot point and the connecting portion of the second arm to the door move outward from the vehicle body in a substantially arc-shaped trajectory, and then trace a trajectory substantially along the side surface of the vehicle body. and a guide cam groove for guiding the roller.