JPH0431848Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention improves the seal structure of an automobile door using a weather strip, and more specifically, improves the mounting position and cross-sectional shape of the weather strip.
This invention relates to a sealing structure for an automobile door using a weather strip that can exhibit sealing performance even with current variations in installation.

(Prior art) A weather strip having a flexible hollow part is mounted on the body side or door side of an automobile, and when the door is closed, the hollow part is depressurized and comes into contact with the sealed surface on the door side or body side. Various automobile door sealing structures have been proposed that use a weather strip that pressurizes the hollow portion to bring it into close contact with the surface to be sealed after the door is closed.

Japanese Patent Publication No. 46-28847 ``Locking and Sealing Device'' discloses a structure as schematically illustrated in FIGS. 8 and 9. In addition, FIG. 8 shows a cross section of the upper part of the door.
FIG. 9 shows the lower section of the door.

In FIGS. 8 and 9, 21 is a weather strip, 22 is a body side frame, 24 is a door side frame, 24a is a recessed groove, 26 is a hollow part of the weather strip 21, and 27 is a bent part.

In this structure, the weather strip 21 is attached to the inside of the body side frame 22, and the top part 26 of the hollow part 26 formed in the weather strip 21 is attached to the inside of the body side frame 22.
6a also protrudes inward. Also, the door side frame 24 is the sealed surface of the weather strip 21.
is configured to enter inside the body side frame 22 and fit into the recessed groove 24a of the door side frame 24. In other words, this structure is designed to seal inside the body side frame 22 and at the thick part of the door side frame 24, so when the door is in a predetermined position around the entire circumference, the top 26a and This structure allows the recessed grooves 24a to fit together and exhibit sealing performance.

(Problem to be solved by the invention) In the above-mentioned structure, in order to exhibit sealing performance, the weather strip 21 and the body side frame 2 must be
2. The individual dimensional errors of the door side frame 24 must be within the permissible range, and the relative dimensional errors when assembling the door frames 24 must also be within the permissible range.

Now, as shown in FIG. 8, the description will be made assuming that the vertical direction is the H direction, the horizontal direction is the W direction, and the direction perpendicular to the plane of the paper is the Y direction. Since the structure is such that the door side frame 24 is inserted inside the body side frame 22, when the door side frame 24 is assembled into the body side frame 22, if the dimensional accuracy in the H direction and Y direction is not good,
The door frame 24 itself cannot be inserted, and furthermore,
It is difficult to insert the weather strip 21 between them. This tolerance is ±1 in the H direction.
mm, the Y direction must be within ±1 mm. On the other hand, the top 2 of the hollow part 26 of the weather strip 21
6a and the recessed groove 24a of the door side frame 24 are perpendicular to each other, so unless the dimensional accuracy in the W direction is improved, the top 26a and the recessed groove 24a will not be able to fit together, and the sealing function will not be achieved. I can't. This tolerance in the W direction must be within ±0.5mm.

Therefore, in reality, it is not possible to position the top 21a of the weather strip 21 and the recessed groove 22a in a position where they fit together accurately over the entire circumference of the door, resulting in problems such as the door not closing or water leaking. Ta.

Furthermore, with the cross-sectional shape of the weather strip 21 as described above, the volume occupied by the hollow portion 26 when the pressure is reduced is large, which causes the door to become difficult to close. Furthermore, the hollow portion 26 did not have sufficient elasticity when pressurized, causing water leakage.

The purpose of this invention is to provide an automobile door seal structure using a weather strip that can demonstrate sealing performance even with the current installation variation of ±2 mm by improving the mounting position and cross-sectional shape of the weather strip. .

(Means for Solving the Problems) In order to achieve the above object, an automobile door seal structure using a weather strip according to the present invention is as follows:
A weather strip having a flexible hollow part is installed on the body side or the door side of the automobile, and when the door is closed, the hollow part is depressurized so as not to come into contact with the sealed surface on the door side or the body side. In a sealing structure for an automobile door using a weather strip that pressurizes the hollow portion after the door is closed to bring it into close contact with the sealed surface, the sealed surface is aligned with a reference plane on the body side or the door side. The hollow portion of the weather strip is formed with a substantially V-shaped constriction having a center line substantially parallel to the surface to be pressed, and the hollow portion is formed at the center of the V-shape. The area divided by the line is formed such that the area closer to the surface to be sealed is larger than the area on the other side, and the area inside the hollow part closer to the surface to be sealed is A groove is formed to specify the bending position.

(Example) The present invention will be described in detail below with reference to the drawings and the like.

Fig. 1 is a diagram showing a first embodiment of a seal structure for an automobile door using a weather strip according to the present invention, and Figs. 2 to 5 are diagrams for explaining the operation of the structure of the embodiment. be.

In FIG. 1, 1 is a weather strip, 2 is a body, and 4 is a door.

A sealed surface 3 of a body 2, which is an object to be sealed by the weather strip 1, is mounted substantially parallel to a cross-sectional centerline 5 of a glass 4a forming a reference surface of the door 4. In this way, connect body 2 to door 4.
If the structure is such that it covers the weather strip 1, the body 2, and the door 4, the dimensional accuracy of the weather strip 1, the body 2, and the door 4 will not be a big problem, and the sealing performance can be achieved.

The weather strip 1 is attached to the door 4 side at its base, and a hollow portion 6 is integrally formed in this base. An outer wall 13 serving as a sealing surface is formed around the outer periphery of the hollow portion 6.

A constricted portion 7 having a substantially V-shaped cross section is formed on the base side of the hollow portion 6 . The constricted portion 7 is provided to bend and reduce the occupied cross-sectional area when the hollow portion 6 is depressurized. If a center line 10 that is the average of a substantially V-shaped inner circumferential line 8 of the constricted portion 7 and an outer circumferential line 9 corresponding to this inner circumferential line 8 is imagined on FIG. 1, the center line 10 of the constricted portion 7 is It is attached so that it is parallel (0°) or intersects within 30° with the cross-sectional center line 5 of the door glass 4a, which serves as the reference plane of the door 4. This is because the weather strip 1 can be made smaller in the direction of movement of the door 4.

The hollow interior region A in which the hollow portion 6 is divided into two by the center line 10 of the constricted portion 7 is shaped so that the region A on the side of the sealing surface 6a is equal to or larger than the other region B. This is because the weather strip 1 exhibits sufficient elasticity against the force received by the weather strip 1, that is, the force in the direction indicated by the arrow in FIG. 1, and can exhibit better sealing performance.

In region A of the hollow portion 6, grooves 11 and 11a are formed in the longitudinal direction of the weather strip 1 at substantially opposing positions. This is to make it easier to bend by identifying the position of the unevenness during pressurization and depressurization for opening and closing the door.

Next, the operation of the weather strip used in the present invention will be explained with reference to FIGS. 2 to 5.

2 and 3 are cross-sectional views showing a state in which the pressure in the hollow part 6 is reduced, respectively. FIG. 2 shows the upper part of the door, and FIG. 3 shows the hinge part of the door. It is a diagram.

When decompressed air is supplied to the hollow part 6 of the weather strip 1 from an air supply port (not shown), the approximately V-shaped constriction part 7 and the groove 1 inside the hollow part 6
1 and 11a are deformed into predetermined concave shapes.

2 and 3 show the door 4 in an open state. The door 4 is closed along the trajectory of the arrow 12, and the body 2 is closed until the closing operation of the door 4 is completed.
Do not come into contact with. For this reason, with conventional weather strips, repulsive force acts when closing the door 4, making it difficult to close the door 4, but with the weather strip 1 used in the present invention, the repulsive force does not act, so the door 4 closes. It became easier to close.

4 and 5 are cross-sectional views showing the hollow portion 6 in a pressurized state, respectively. FIG. 4 shows the upper part of the door, and FIG. 5 shows the hinge part of the door. This is a diagram.

4 and 5 show the door 4 in a closed state. In this state, when pressurized air is supplied to the hollow part 6 of the weather strip 1, the weather strip 1 is deformed into a concave shape (see Figs. 2 and 3).
1), the outer wall 13 of the hollow portion 6 comes into contact with the sealing surface 3 of the body 2, and the weather strip 1 becomes in a state in which it performs normal sealing performance.

Further, when pressurized air is supplied to the hollow portion 6, the approximately V-shaped constriction portion 7 is deformed to open. Therefore, the range in which the outer wall 13 of the hollow portion 6 contacts the sealed surface 3 of the body 2 is expanded toward the outdoors. If more pressurized air is supplied, the V of the constriction 7
By changing the shape from a flat shape to an inverted V shape,
This increases the contact range of the seal portion.

At the top of the door (Figures 2 and 4), body 2
The door 4 moves horizontally at an angle of 20 to 40 degrees with respect to the surface 3 to be sealed, but the door hinge (third
In Figure 5), it moves in an arc, so
The surface 3a to be sealed with the hollow portion 6 of the door weather strip 1 changes to the upper side. The sealing performance of each part is maintained even under such door opening/closing trajectories.

FIG. 6 is a diagram showing a second embodiment of an automobile door seal structure using a weather strip according to the present invention.

In the second embodiment and the third embodiment described later, the same reference numerals are given to parts that perform the same functions as those in the first embodiment described above.

The second embodiment shows an example in which the weather strip 1 is attached to the body 2 side, and the sealed surface 3 is located on the door 4 side.

FIG. 7 is a diagram showing a third embodiment of an automobile door seal structure using a weather strip according to the present invention.

In the third embodiment as well, the weather strip 1 is connected to the body 2.
Although it is attached to the side, the surface to be sealed 3 is the door 4.
An example is shown on the door glass 4a.

(Effects of the invention) As explained in detail above, according to the invention,
There are various effects as follows.

Since the surface to be sealed is located approximately parallel to the glass centerline, which is the center plane of the door, the door will not close even if the weather strip, door, or body, and their relative dimensional accuracy are somewhat poor. Problems such as water leakage have disappeared.

A roughly V-shaped constriction is formed at the base of the hollow part so that it bends in the direction in which pressure is applied, so when the pressure is reduced, the constriction folds up and does not come into contact with the surface to be sealed, making it easier to close the door. . Further, a pair of grooves facing each other is provided in the hollow portion, and a curved portion that is deformed concavely due to the effect of the constriction portion when the pressure is reduced can be identified, so that non-contact with the surface to be sealed can be ensured.

Since the area on the sealing surface side of the hollow part is set large, elasticity when pressurized is improved, and sealing performance is improved. Further, when pressurized, the constriction changes from an open angle to a flat and inverted V-shape to increase the sealing area and improve sealing performance.

In addition, even in the unlikely event that the air supply source malfunctions,
Because of the constricted part, the door can be easily bent during closing, and the door will not be difficult to close.
Furthermore, the sealing effect can be maintained even after the door is closed.

[Brief explanation of drawings]

Fig. 1 is a diagram showing a first embodiment of a seal structure for an automobile door using a weather strip according to the present invention, and Figs. 2 to 5 are diagrams for explaining the operation of the structure of the embodiment. be. FIG. 6 is a diagram showing a second embodiment of an automobile door seal structure using a weather strip according to the present invention. FIG. 7 is a diagram showing a third embodiment of an automobile door seal structure using a weather strip according to the present invention. FIGS. 8 and 9 are diagrams showing conventional examples of a seal structure for an automobile door using a weather strip. 1...Weather strip, 2...Body, 3...
...Sealed surface, 4...Door, 6...Hollow part, 7...
...constriction, 11, 11a...concave groove.

Claims (1)

[Scope of utility model registration request] A weather strip having a flexible hollow part is installed on the body side or the door side of the automobile, and when the door is closed, the hollow part is depressurized so as not to come into contact with the sealed surface on the door side or the body side. In a sealing structure for an automobile door using a weather strip that pressurizes the hollow portion after the door is closed to bring it into close contact with the sealed surface, the sealed surface is aligned with a reference plane on the body side or the door side. is formed approximately parallel to the
A substantially V-shaped constriction part whose center line is substantially parallel to the surface to be pressed is formed in the hollow part of the weather strip, and a region of the hollow part divided by the center line of the V-shape is defined by the constriction part of the weather strip. It is formed so that the area on the side closer to the surface to be sealed is larger than the area on the other side,
A sealing structure for an automobile door using a weather strip, characterized in that a concave groove is formed in a region near the sealed surface inside the hollow part to specify a position where the weather strip bends when pressure is applied or depressurized.