JPH09300963A - Weather strip - Google Patents

Abstract

(57) [PROBLEMS] To provide a weather strip capable of smoothly opening and closing a door and reducing costs. A weather strip 1 of the present invention is a door 1.
A protruding portion 9 is provided along the longitudinal direction of the lip portion near the top of the lip portion 8 that comes into contact with the outer edge 21a of the door opening portion 21 when 1 is closed. This protrusion 9 is the lip 8
By contacting the outer edge 21a of the door opening 21 in response to the bending deformation of the door, the contact resistance between the lip portion 8 and the door opening 21 can be reduced without impairing the sealing property, and the silicone coating amount Regardless, the door 11 can be opened smoothly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weatherstrip used for dustproofing and waterproofing, and more particularly to a structure of a weatherstrip suitable for an opening / closing portion between a body and a door of an automobile.

[0002]

2. Description of the Related Art The outer peripheral portion of a door such as an automobile which can be opened and closed is provided in Japanese Utility Model Publication No. 61-15624 and Japanese Utility Model Publication No. 3-912.
A weather strip is provided for preventing rainwater from entering and soundproofing as disclosed in Japanese Patent No. Hereinafter, an example of a conventional weather strip will be described with reference to FIGS. As shown in FIG. 7, a door opening 61 is provided on the side surface of the sedan type automobile 31, and a hinged door 51 is provided so as to be openable and closable. The structure of the weather strip 41 provided on the outer peripheral edge of the frame of the door 51 will be described with reference to FIG. 8 which is a cross-sectional view of the rear pillar portion 32 in FIG.

The weather strip 41 is made of an elastic material such as a polyolefin sponge rubber typified by an ethylene / propylene copolymer (hereinafter referred to as EPDM) in a longitudinal shape. A base portion 43 having a hollow portion 42, and fixing portions 44a, 44 formed below the base portion 43 so as to project to the left and right.
b, a fitting concave portion 45 formed on the right side of the base portion 43, a main seal portion 47 on the left side of the base portion 43 that is formed into a bag shape by a hollow portion 46, and from a substantially central portion of the base portion 43. And a lip portion 48 formed in an arc shape toward the upper side.

Next, the structure of the main part of the door 51 will be described. A fitting portion 52 and a fitting protrusion 53 are provided on the outer peripheral portion of the door 51.
Are formed. The fitting portion 52 is the fixing portion 44.
a and 44b are elastically fitted, and the bottom surface of the base portion 43 is fixed.
It is adapted to engage inside. The fitting portion 52 is
The recess formed on the lower side of the fitting projection 53 and the fixing portion 44a
And a locking projection 52a formed so as to hold down.

On the other hand, the peripheral edge of the door opening 61 is shown in FIG.
As shown in the left side of the inside, it is formed in a stepped shape, and when the door 51 is closed, it is fitted into the door opening 61 from the direction of arrow B. The shape of the lip portion 48 is a shape inclined toward the upper right in FIG. 8, and the height to the top is higher than the outer edge 61a of the door opening 61, but is shown in FIG. By closing the door 51 like
The top of 8 contacts the outer edge 61a and then slides along the outer edge 61a. Therefore, as shown in FIG. 10, the top portion of the lip portion 48 comes into surface contact with the outer edge 61a.

Further, as shown in FIG. 8, the main seal portion 4
7 is formed so as to be sandwiched between the door 51 and the side surface of the door opening 61, and is crushed and pressed against the side surface 61b of the door opening 61 as shown in FIG.
As a result, rainwater and the like are doubly blocked by the lip portion 48 and the main seal portion 47, so that rainwater is prevented from entering the vehicle and has a soundproofing function at the same time.

[0007]

However, the conventional weather strip 41 has the following problems. That is, the entire lip portion 48 is flexible, and when the door 51 is closed, the entire top portion is in surface contact with the outer edge 61a of the door opening portion 61, so that the contact resistance is high. Therefore, when the door 51 is opened, the top portion of the lip portion 48 is less likely to slip, and the entire lip portion 48 tends to incline in the opposite direction, that is, to be inverted. In such a reversal phenomenon, the lip 48 deforms upright and then tilts in the opposite direction, and this movement causes a resistance when the door 51 is opened, and a smooth opening operation of the door is hindered. It will be. Therefore, as a reversal prevention measure, a paint such as silicone is applied to the entire top of the lip portion 48 to reduce the frictional resistance, but the film thickness of the silicone must be a certain thickness or more, resulting in a high cost. There is.

An object of the present invention is to provide a weatherstrip capable of smoothly opening and closing a door and reducing costs.

[0009]

Means for Solving the Problems The above problem is a weather strip fixed to an outer peripheral portion of a door which is openable and closable, and is pressed against the peripheral edge of an opening when the door is closed. A lip is formed that elastically bends and deforms by contacting the periphery of the opening when the door is closed, and a protrusion is formed at a position apart from the contact position of the tip of the lip that has been flexibly deformed with the opening. Is provided
This can be solved by a weather strip characterized in that the lip portion and the opening portion are in contact with each other at a plurality of points. Further, the above-mentioned problem can be solved by the weather strip, wherein the projection is provided at least on the lip portion of the outer peripheral portion on the door side corresponding to the rear pillar portion.

According to the weather strip having the above-mentioned structure, when the door is closed, the apex, which is the tip of the lip portion, contacts the peripheral edge of the opening portion, and the protruding portion and the peripheral edge of the opening portion also correspond to the bending deformation of the lip portion. To contact. Further, since the protrusion is formed at a position apart from the top of the lip, the lip and the opening come into contact with each other at a plurality of points, which is a contact resistance as compared with a surface contact such as a conventional weather strip. Is reduced. As a result, although the lip portion is coated with silicone, it is not necessary to strictly control the silicone coating thickness to a certain thickness or more, and the manufacturing cost can be reduced.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a weather strip to which the present invention is applied will be described below with reference to FIGS. FIG. 1 is a sectional view of a main part showing a structure of a weather strip of the present invention, FIG. 2 is an enlarged sectional view showing a main part of a lip portion in FIG. 1, and FIG. 3 shows a deformed state of the weather strip when a door is closed. FIG. 4 is a cross-sectional view showing the main part of the lip portion in FIG. 3, FIG. 5 is a cross-sectional view of the main part showing the change in the form of the weather strip corresponding to the change in the shape of the door opening, and FIG. FIG. 6 is a cross-sectional view of a main part showing a shape change of the weather strip corresponding to another shape change of the door opening. In the description of the embodiment of the present invention,
The drawings referred to in the description of the conventional example are appropriately incorporated.

The weather strip 1 of this embodiment is
This is applied to the rear door 11 of the sedan type automobile shown in FIG. 7, and the relationship with the outer edge of the rear pillar 32 that forms a part of the door opening 21 will be described based on the XX sectional view. This weather strip 1 is a rear pillar 3
It seals between the rear door 11 and the rear door 11, and is formed by forming an elastic material such as polyolefin sponge rubber typified by EPDM in a longitudinal shape. The sectional structure will be described below with reference to FIGS. 1 and 2.
A base portion 3 having a hollow portion 2 formed therein, and fixing portions 4a, 4b formed so as to project to the left and right below the base portion 3.
And a fitting recess 5 formed on the outside of the base 3 (on the right in the figure)
It has. In addition, a main seal portion 7 formed inside the base portion 3 (on the left side in the drawing) and protruding in a bag shape by the hollow portion 6.
And a lip portion 8 formed in an arc shape from the substantially central portion of the base portion 3 toward the opening edge side (upper side in the drawing), and a protrusion portion 9 formed along the longitudinal direction near the top of the lip portion 8. Is equipped with.

The weather strip 1 is used by being fixed to the outer peripheral portion of the door 11, and a fitting portion 12 and a fitting protrusion 13 are formed on the outer periphery of the door frame on the door 11 side. . The fitting portion 12 elastically fits the fixing portions 4a and 4b and fixes the bottom surface of the base portion 3, and the fitting projection portion 13 is adapted to engage with the fitting concave portion 5. . The fitting portion 12 is composed of a concave portion formed below the fitting projection portion 13 and a locking projection 12a formed so as to hold down the fixing portion 4a.

On the other hand, the periphery of the door opening 21 side of the automobile is formed in a step shape, and the weather strip 1 is
When 1 is closed, it is fitted into the door opening 21 from the direction of arrow A. Further, the original shape of the lip portion 8 is a shape inclined toward the top, and the top is the opening 2 for the door.
It is formed longer than the outer edge 21a. Therefore, when the door 11 is closed, the top of the lip portion 8 comes into contact with the outer edge 21a and then slides along the outer edge 21a, so that the lip 8 is elastically deformed to incline further outward.

The lip portion 8 which contacts the outer edge 21a
As shown in the enlarged view of FIG.
Are formed along the longitudinal direction of the lip portion 8. The height of the apex tp of the protrusion 9 with respect to the apex Tp of the lip 8 is set low before the door 11 is closed. That is, when the apex Tp of the lip portion 8 and the apex tp of the protrusion 9 are connected, the imaginary tangent line L is left downward in the drawing.

Next, the operation of the weather strip 1 when the door 11 is closed will be described. The door 11 as shown in FIG.
Is closed in the direction of arrow A, the entire door 11 is fitted into the door opening 21, and the main seal portion 7 is pressed against the side surface 21b of the door opening 21 to be deformed. The base 6 is pushed outward while the portion 6 is crushed. What is important in this state is that the lip portion 8 comes into contact with the outer edge 21a as shown in FIG. 4 so that the lip portion 8 bends to fall outward (to the right in the figure). 21a is pressed. Therefore, when the door 11 is closed, the top Tp of the lip 8 is
And the top tp of the protrusion 9 are pressed against the outer edge 21a.

Moreover, since the projection 9 is an arcuate projection, a valley is formed between the top tp of the projection 9 and the top Tp of the lip 8. Therefore, when the door 11 is closed, both tops Tp and tp are in pressure contact with the outer edge 21a, but a non-contact section La is formed between them and the lip portion 8 is formed.
Line contact with the outer edge 21a occurs at two points in the vicinity of the apex, and the contact resistance with the outer edge 21a decreases.

Therefore, since the contact resistance can be reduced while surely preventing the deterioration of the sealing property which causes the generation of abnormal noise due to the wind pressure, the action of reversing the lip portion described in the conventional example can be achieved. It can be surely prevented.
As a result, even if the coating thickness of the silicone applied to the lip portion 8 is less than a certain thickness, the slip of the lip portion 8 is not deteriorated and the lip portion 8 is not inverted, so that the door 11 can be opened. There is less resistance and a smooth opening operation can be performed. Further, it is not necessary to strictly control the silicone coating thickness to a certain thickness or more, and it is possible to avoid coating an excessive thickness of a certain thickness or more, so that cost reduction and work efficiency can be improved.

Next, the operation when the configuration of the outer edge of the door opening 21 with which the lip portion 8 abuts is different from the above-described configuration will be described. As shown in FIG. 5, the outer edge 2 of the door opening 21
There is a shape in which the outer edge 21c is inclined toward the door 11 side by an angle θ ₁ because the outer edge 21c is formed so as to gradually project from the inner side to the outer side of the outer edge 21c. However, since the lip portion 8 is deformed along the outer edge 21c, the top portion of the lip portion 8 and the protrusion 9 contact the outer edge 21c in the same manner as described above, and the frictional resistance is reduced as described above. Therefore, although the force for reversing the lip portion 8 is greater than that in the case of FIGS. 3 and 4, due to the approach angle when the door 11 is opened with respect to the outer edge 21c, the lip portion 8 has a larger force. Inversion is unlikely to occur, and it is not necessary to strictly control the silicone coating thickness above a certain thickness.

Next, the operation will be described when the configuration of the outer edge of the door opening portion 21 with which the lip portion 8 abuts is further different from the above-described configuration. As shown in FIG. 6, the outer edge 21d of the door opening 21 is not uniform in shape and is formed so as to gradually expand from the inner side to the outer side of the outer edge 21d, so that the outer edge 21d has an angle of θ ₂ minutes. However, there is one that is inclined to the side opposite to the door 11 side. Therefore, the lip portion 8 is deformed along the outer edge 21d, the top portion of the lip portion 8 and the protrusion 9 contact the outer edge 21d in the same manner as described above, and the friction resistance is reduced as described above. Further, because of the angle of approach to the outer edge 21d of the door 11 at the time of opening, the force for reversing the lip portion 8 is smaller than in the case of FIGS. Inversion of the portion 8 is even less likely to occur, and silicone coating can be omitted.

[0021]

As described above, in the weather strip according to the present invention, one end of the weather strip is formed with a lip portion that elastically bends and deforms by contacting the peripheral edge of the opening when the door is closed. Providing a protrusion at a position away from the contact position with the opening of the tip of the flexed and deformed lip,
The lip and the opening are in contact with each other at a plurality of points.
Therefore, the lip portion comes into line contact with the outer edge of the opening at two points, and the contact resistance is reduced as compared with the surface contact as in the conventional example. Therefore, although the lip portion is coated with silicone, it is not necessary to strictly control the film thickness, and the cost can be reduced. In addition, it is possible to secure the sealing property without generating abnormal noise and the like, and it is possible to smoothly perform the opening operation of the door.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a weather strip of the present invention.

FIG. 2 is an enlarged cross-sectional view showing a configuration of a lip portion in FIG.

FIG. 3 is a cross-sectional view showing the form of a weather strip when the door in FIG. 1 is closed.

FIG. 4 is an enlarged cross-sectional view showing a contact state of a lip portion in FIG.

FIG. 5 is a cross-sectional view showing a change in form of a lip portion corresponding to another configuration of the door opening.

FIG. 6 is a cross-sectional view showing a form change of a lip portion corresponding to still another configuration of the door opening.

FIG. 7 is a perspective view of an automobile to which a weather strip is applied.

FIG. 8 is a cross-sectional view showing a structure of a conventional weather strip.

9 is a sectional view showing the form of a weather strip when the door in FIG. 8 is closed.

10 is an enlarged cross-sectional view of a main part showing a contact state of a lip portion in FIG.

[Explanation of symbols]

1 Weatherstrip 2, 6 Hollow part 3 Base parts 4a, 4b Fixed part 5 Fitting concave part 7 Main seal part 8 Lip part 9 Projection part 11 Door 21 Door opening 21a Outer edge 21b Side surface 32 Rear pillar part Tp Lip top part tp projection Angles of the outer edges of the tops θ ₁ and θ ₂

Claims (2)

[Claims] 1. A weather strip fixed to an outer peripheral portion of a door (11) side which can be opened and closed, and in pressure contact with a peripheral edge of an opening portion (21) when the door is closed. When the (11) is closed, a lip part (8) is formed that comes into contact with the peripheral edge of the opening part (21) and elastically bends and deforms, and the opening part at the tip of the flexibly deformed lip part (8) ( 21) A weather strip characterized in that a protrusion (9) is provided at a position apart from a contact position with the contact part (21), and the lip part (8) and the opening part (21) are in contact with each other at a plurality of points. 2. In the weather strip, the protrusions (9) are provided on at least the lip portion (8) of the outer peripheral portion on the door (11) side corresponding to at least the rear pillar portion (32). The weather strip according to claim 1, which is characterized in that.