JPH0422733B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a sealing device for sealing the closed state of a door for opening and closing an entrance/exit of a vehicle.

(Prior Art) Conventionally, as shown in FIG. 5, the wrap distance of the seal member s with respect to the sealed surface h of the entrance/exit, that is, the cross-sectional dimension b of the seal member s, and the installation dimension a of the door have been calculated. The compression deformation amount c corresponding to the difference was set to a constant value that can absorb the variations in a and b and ensure sealing performance and easy operation performance when closing the door.

(Problem to be Solved by the Invention) In the case of the above sealing means, when the door is sucked out by a distance d to the outside of the vehicle due to wind pressure when the vehicle is running at high speed, the compression deformation amount of the sealing member s becomes (c-d). As a result, the sealing performance during high-speed driving deteriorates significantly and the sound insulation effect decreases.Also, if the compression deformation allowance is set to increase, the sealing performance during high-speed driving improves, but the door closes. There was a problem in that it was not possible to satisfy both contradictory required characteristics at the same time because the operating performance deteriorated.

An object of the present invention is to provide a door sealing device for a vehicle that solves the above problems and achieves both performances.

(Means for Solving the Problems) The present invention provides an inner and outer part that extends vertically in parallel to the base of a sealing member that is interposed between a vehicle entrance and the periphery of a door that opens and closes this entrance and exit. In order to reduce the pressure in one of the hollow parts of the pair in response to the opening/closing operation of the door, the negative pressure pipe is connected to one of the hollow parts. The base part has a lip part extending toward the sealed surface side for elastic contact with the sealed surface of the entrance/exit, and one of the hollow parts is depressurized. The gist of the present invention is to provide a sealing device in which the lip portion is connected in such a manner that the lip portion is tilted toward the inside of the vehicle or the outside of the vehicle, thereby increasing or decreasing the amount of compressive deformation of the lip portion with respect to the sealed surface.

(Function) The device of the present invention reduces the pressure in one of the pair of inner and outer hollow portions extending vertically in parallel with the base of the seal member in synchronization with the opening/closing operation of the door, and depressurizes one of the hollow portions of the pair of inner and outer hollow portions extending vertically in parallel to the base of the seal member, and The lip part, which is extended to come into elastic contact with the surface to be sealed, is tilted toward the outside of the vehicle when the door is open to reduce the amount of compressive deformation of the lip portion against the surface to be sealed, and tilted toward the outside of the vehicle when the door is closed. This increases the compressive deformation margin of the lip portion to improve the operability of closing the door and to prevent the door from being sucked out during high-speed driving.

(Example) Next, an example of the present invention will be described with reference to the drawings.

A strip-shaped sealing member 1 attached to the periphery of the door D that opens and closes the entrance/exit of the vehicle in order to seal the closed state of the door D is formed of an elastic material such as rubber so that it can be elastically deformed in the cross-sectional direction. A mounting portion 2 fitted into the mounting frame D1 of the door D, a base portion 3 connected to the mounting portion 2, and a lip formed to make elastic contact with the sealed surface H of the entrance/exit when the door D is closed. The portion 4 is continuous in the cross-sectional direction.

In the base 3, a pair of inner and outer hollow parts 5 and 6, which are connected to a negative pressure pipe 19 of a pressure reducing circuit G to be described later so as to be able to be opened unilaterally, are vertically penetrated in parallel across a partition wall 7, and the inner hollow part When the inside of the outer hollow part 6 is depressurized, the first flexible wall 8 formed on the outer wall of the inner hollow part 5 and the inner end of the base 3 is elastically deformed into a concave shape. A second flexible wall 9, which is connected to the first flexible wall 8 in an approximately orthogonal manner on the outer wall of the hollow portion 6, is elastically deformed into a concave shape.

The lip portion 4 extending toward the tip of the base portion 3 so as to be able to make elastic contact with the surface to be sealed H is formed in a hollow shape with an outer wall 10 bent in a folded shape, and the root portion 10a of the outer wall 10 on the inside of the vehicle is connected to the above-mentioned portion. The root portion 10b of the outer wall 10 on the outside of the vehicle is connected to the first flexible wall 8, and the root portion 10b of the outer wall 10 is connected to the second flexible wall 9, so that when the pressure inside the inner hollow portion 5 is unilaterally reduced, the first flexible wall 8 The bending deformation causes the lip portion 4 to tilt toward the inside of the vehicle, while the outer hollow portion 6
When the pressure inside the vehicle is unilaterally reduced, the lip portion 4 can be tilted toward the outside of the vehicle by bending and deforming the second flexible wall 9.

Next, the pressure reducing circuit G connected to both the hollow parts 5 and 6 to reduce the pressure in one of the hollow parts 5 and 6 will be explained.

A four-port switching valve 11, 11 provided to switch the internal flow path in synchronization with the opening/closing operation of the door D is connected to the switching valve 11 and the battery.
The operation is controlled by door lamp switches 12, 12 whose contacts are opened and closed by the opening and closing operations of Second supply/discharge pipes 14, 14 are connected to each other. Further, the switching valve 11 is connected to an engine intake manifold 21 or a negative pressure line 19 connected to the vacuum pump 16 via a check valve 17 and a tank 18 for storing negative pressure air, and a normal pressure line 19 connected to the air cleaner 21. Pressure pipe lines 20 are connected to each other. When the closed door D is opened and the contact of the door lamp switch 12 is opened, the switching valve 11 connects the first supply and discharge pipe 13 to the normal pressure pipe 20 and the second supply and discharge pipe 14 to the negative pressure pipe. The inner hollow part 5 is held in a state where it is communicated with the passage 19.
The inside is at normal pressure and the inside of the outside hollow part 6 is unilaterally reduced in pressure,
The lip portion 4 is tilted toward the outside of the vehicle, and the compressive deformation amount of the lip portion 4 with respect to the sealed surface H is reduced from L0 to L1 (see Fig. 2B), while the door D is in an open state.
When the contact point of the door lamp switch 12 is closed, the internal flow path of the switching valve 11 is switched so that the first supply/discharge pipe 13 communicates with the negative pressure pipe 19 and the second supply/discharge pipe 14 communicates with the normal pressure pipe. connected to Road 20,
The outer hollow part 6 is at normal pressure, and the inner hollow part 5 is unilaterally depressurized, causing the lip part 4 to tilt toward the inside of the vehicle, and the sealed surface H
The compression deformation amount of the lip portion 4 is from L0 to L1.
Even if the door D is sucked out to the outside of the vehicle by wind pressure when the vehicle is running at high speed, the displacement E of the door D can be absorbed to ensure sealing performance.

Note that when the negative pressure in the tank 18 becomes lower than the set pressure, the vacuum relief valve 22 closes the air filter 2.
1, the outside air flows into the tank 18, and the tank 18
The negative pressure inside is adjusted.

Next, the operation and effects of the embodiment having the above configuration will be explained.

Now, in this example, door D opens and closes the entrance/exit of the vehicle.
A pair of inner and outer hollow portions 5 and 6 are arranged vertically in parallel to the base 3 of the seal member 1 attached to the peripheral edge of the seal member 1.
In order to depressurize one of the hollow portions 5 and 6 in response to the opening/closing operation of the door D to bend and deform one of the first and second flexible walls 8 and 9 formed in the base portion 3. The negative pressure pipes 19 are connected to the negative pressure pipes 19 of the pressure reducing circuit G in such a manner that the negative pressure pipes 19 are selectively communicated with one of the two hollow parts 5 and 6, and are in elastic contact with the sealed surface H of the entrance/exit. When the inside of the outer hollow part 6 is unilaterally depressurized, the inner and outer root parts 10a and 10b of the outer wall of the lip part 4, which is formed in a hollow shape and extended beyond the base part 3, are Due to the bending deformation of the flexible wall 9, the lip portion 4 is tilted toward the outside of the vehicle, and the compressive deformation amount of the lip portion 4 against the sealed surface H is reduced, and the inner hollow portion 5 is
The first flexible walls 8 and the second The flexible walls 9 are connected to each other.

Therefore, while the door D is open, the lip portion 4 is tilted toward the outside of the vehicle, and the compression deformation length L1 of the lip portion 4 when closing the opened door D is compared with the compression deformation amount L1 of the lip portion 4 when the door D is not tilted. It can be changed to the difference (L0-F1) between the amount L0 and the tilting amount F1 of the lip portion 4 to the outside of the vehicle, and this compression deformation amount L1=L0-F1
The variation in the installation dimensions of door D and the seal member 1
The compression deformation amount L is set from the variation in the dimensions of
0 and the displacement allowance E when the door D is sucked out during high-speed driving, that is, the compression deformation allowance (L0 + E) set to ensure sealing performance during high-speed driving. This reduces the repulsive force when the seal member 1 for closing the door D is pressed against the sealed surface H, smoothes the closing operation of the door D, and ensures easy operation performance when closing the door. It has a soothing effect.

In addition, when the door D is closed and the vehicle is running, the lip portion 4 is tilted toward the inside of the vehicle, and the compression deformation amount L2 of the lip portion 4 is changed to the compression deformation amount L0 of the lip portion 4 when the door is not tilted. The effective compressive deformation amount of the lip portion 4, which is reduced when the door D is sucked out during high-speed driving, can be changed from (L0-E) to (L0+F2).
2) The displacement E of the door D, which is increased to -E and sucked out, is absorbed by the inward tilting amount F2 of the lip part 4, and the sealing performance while the door D is closed is constantly improved to ensure sealing during high-speed driving. This has the effect of avoiding problems that degrade performance.

Therefore, the lip portion 4 against the surface H to be sealed
It is possible to accurately increase or decrease the compression deformation amount in synchronization with the opening/closing operation of the door, and to simultaneously satisfy the conflicting requirements of easy operation performance and sealing performance when closing the door. .

Figure 6 shows the compressive load K (g/100
mm) and the compressive deformation margin L (mm) of the sealing member 1, and a characteristic curve A2 when the pressure inside the outer hollow part 6 is reduced while the door D is open. Figure 7 shows the load on the seal member 1 of this example.
This is a comparison between the deformation curve A and the load-deformation curve B of the conventional seal member, and shows the fluctuation of the seal member 1 of this example within the range of fluctuation of the compression deformation length L when the door is sucked out at high speed. The variation range n of the sealing member 1 of this example within the variation range of the compression deformation margin L, which is a composite of the variation in the installation of the door and the variation in the cross-sectional dimensions of the sealing member, is the area m when the door is sucked out. Variation range of conventional seal members
When compared with m' and the variation range n' of a conventional sealing member, which combines variations in door installation and variations in cross-sectional dimensions of the sealing member, m>
Fig. 6 shows that the sealing performance of the sealing member of this example when the vehicle is running and the performance of closing the door are improved compared to the conventional sealing member, since m' and n<n'. Figure 7 clearly shows this.

Note that the sealing member has a cross-sectional shape shown in FIGS. 4A to 4D instead of the cross-sectional shape of the above embodiment, and has lip portions 4A, 4B, 4C, 4D and hollow portions 5A, 6A, 5B, 6B, 5C. ,6C,5D,6
Each sealing member 1A, 1B, which formed D,
1C and 1D can be applied.

Furthermore, in the above embodiment, the sealing device applied to the sealing member attached to the door side was illustrated, but
The sealing device of this embodiment can also be applied to the sealing member attached to the body side by inverting the sealing member 180 degrees in the cross-sectional direction and attaching it to the body side.

(Effects of the Invention) That is, the present invention provides a pair of inner and outer hollows extending parallel to the base of a sealing member interposed between a vehicle entrance and the periphery of a door that opens and closes the entrance. The negative pressure pipe is selectively communicated with one of the hollow parts to reduce the pressure in one of the hollow parts in response to the opening/closing operation of the door. The base part has a lip part extending toward the sealed surface side in order to come into elastic contact with the sealed surface of the entrance/exit. The effective sealing distance of the sealing member corresponds to the opening/closing operation of the door by connecting the lip portion such that the lip portion is tilted toward the inside or outside of the vehicle to increase or decrease the compressive deformation amount of the lip portion with respect to the sealed surface. It has the effect of controlling the increase/decrease accurately and improving the ease of operation when opening and closing the door and the sealing performance when the door is closed, especially when driving at high speeds.

[Brief explanation of drawings]

1 to 4 show embodiments of the present invention, in which FIG. 1 is an enlarged sectional view of the main part, FIGS. 4 is a cross-sectional view showing other examples of the seal member, FIG. 5 is a cross-sectional view showing a conventional seal member, and FIGS. 6 and 7 are a diagram of the seal member. It is a characteristic curve diagram showing the relationship between compressive load/compressive deformation margin. 1... Seal member, 3... Base, 4... Lip part,
5, 6...Hollow part, D...Door, H...Sealed surface.

Claims (1)

[Claims] 1. A pair of inner and outer hollow portions that run parallel to the base of the seal member interposed between the vehicle entrance and the periphery of the door that opens and closes the entrance and exit door, and are connected to respective negative pressure pipes in order to reduce the pressure in response to the opening/closing operation of the door, so that this negative pressure pipe is selectively communicated with one of the two hollow parts, and is connected to the base part. The lip portion extends toward the sealed surface side in order to come into elastic contact with the sealed surface of the entrance/exit. 1. A door sealing device for a vehicle, characterized in that the lip portion is connected so as to increase or decrease the amount of compressive deformation of the lip portion relative to the surface to be sealed by being tilted.