CN112172486A

CN112172486A - Door seal for vehicle

Info

Publication number: CN112172486A
Application number: CN202010633461.8A
Authority: CN
Inventors: 朝仓真人; 水谷弘次; 高桥诚
Original assignee: Honda Motor Co Ltd; Tokai Kogyo Co Ltd
Current assignee: Honda Motor Co Ltd; Tokai Kogyo Co Ltd
Priority date: 2019-07-04
Filing date: 2020-07-02
Publication date: 2021-01-05
Also published as: JP2021011144A; JP6982029B2

Abstract

The invention provides a sealing member capable of maintaining and exhibiting high sealing performance even when subjected to high-pressure water. A vehicle door seal (1) that seals between a door (D) and a vehicle body (B) is provided with: a seal base (3) which is mounted in contact with a part of the door (D); a sealing portion (4) of a hollow structure, which is integrally formed with the seal base (3) and has an abutting portion (7) that abuts against the vehicle body (B) when the door (D) is closed, and a part of the sealing portion (4) is crushed and deformed between the door and the vehicle body; a tongue-shaped first lip (5) that is formed integrally with the seal portion and protrudes in a predetermined direction from an outer surface (4a) of the seal portion; and a tongue-shaped second lip (6) that is formed integrally with the seal portion and protrudes in a direction that is different from the protruding direction of the first lip and that is orthogonal to the direction (WF) in which water that has reached from the gap between the door and the vehicle body enters.

Description

Door seal for vehicle

Technical Field

The present invention relates to a door seal for a vehicle. More specifically, the present invention relates to a door seal for a vehicle, which is attached along a peripheral edge of a vehicle opening or the like that opens into a door or a vehicle body of the vehicle, and which is elastically deformed when the door is closed to prevent entry of rainwater or the like into the vehicle.

Background

Conventionally, a vehicle door seal (also referred to as a "weather strip for a vehicle") is attached along a peripheral edge of a vehicle opening portion of a vehicle body as a door serving as a movable member and/or a fixed member (for example, see patent document 1). In this vehicle door seal (hereinafter, simply referred to as "seal"), the seal attached between the door and the vehicle body is elastically deformed and is in a sandwiched state by an operation of closing the door while approaching the vehicle opening.

Accordingly, the seal is strongly pressed against the door or the vehicle body by the elastic restoring force (or elastic reaction force) of the seal, and the gap between the door and the vehicle body is closed, thereby blocking the entry path of rainwater or the like. As a result, it is possible to prevent water, small foreign substances such as dust and dirt other than water, small insects such as ants, and the like from entering the vehicle interior, and noise, wind, and the like from entering the vehicle exterior. This makes it possible to maintain a comfortable vehicle interior space without causing discomfort to the driver and passengers during driving.

The basic structure of the seal is, for example, such as shown in fig. 4. That is, the seal 100 mainly includes: a seal base 101 fixed to a door, a vehicle body, or the like (not shown) by a known fixing means (for example, a clip or the like); a hollow seal portion 102 formed integrally with the seal base 101, a part of which is crushed and deformed when the door is closed; and a plate-like or tongue-like lip portion 103 formed integrally with the seal portion 102 and protruding outward from the outer surface 102a of the seal portion 102.

The seal 100 is formed using an elastically deformable rubber material as a main material, and the main material having a melt property after being heated to a predetermined temperature and adjusted in viscosity can be molded into a desired shape by using a known resin molding technique such as an extrusion molding technique or a die molding technique (injection molding technique). Here, the seal is attached along the peripheral edge of the door or the like, and therefore is generally long. Therefore, the extrusion molding technique is mainly used for the formation. Fig. 4 schematically shows a cross-sectional shape of the seal 100 obtained by extrusion molding. As a resin material such as an elastically deformable rubber material used as a main material, for example, ethylene-propylene-diene rubber (EPDM), another thermoplastic elastomer, or the like is mainly used.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2016-78720

Disclosure of Invention

Technical problem to be solved by the invention

As described above, the seal formed of EPDM or the like can elastically deform between the door and the vehicle body and block the path of water or the like, and therefore, intrusion from the outside of the vehicle into the vehicle interior can be almost reliably prevented. Namely, high sealing performance is provided. However, in particular, in recent years, problems may occur in a special situation as proposed below.

For example, in the case of washing an automobile, conventionally, water is scattered from above the automobile to wash away soil, dirt, and the like attached to the surface of the automobile body. In this case, the water pressure at the time of washing the car is not so strong.

However, in recent years, high-pressure cleaning machines capable of spraying high-pressure water have been widely used in various households. Therefore, the high-pressure washer may be used to wash an automobile. In an automatic car washer installed at a gas station or the like, high-pressure water is sometimes sprayed to a vehicle body to clean dirt such as mud.

In this case, water may be strongly sprayed on the surface of the vehicle body as compared with conventional normal car washing. Further, some of the jetted water may directly enter through a gap between the door and the vehicle body, and may directly contact the seal in a collapsed state. In this case, the high-pressure water jet may further change the deformation state of the seal.

Thus, although the conventional sealing member can maintain high sealing performance, the sealing member may be deformed by the injection of high-pressure water, and a sufficient water stopping effect may not be exhibited. It is known that water infiltration particularly easily occurs in the rear portion of the door located on the rear seat side of the automobile.

In view of the above circumstances, an object of the present invention is to provide a seal that can maintain and exhibit high sealing performance (water stopping performance) even when subjected to high-pressure water ejected from a high-pressure washer or the like, and that is particularly attached along the peripheral edge of a door on the rear seat side of an automobile.

Means for solving the problems

According to the present invention, a door seal (vehicle door seal) that solves the above-described problems is provided.

[1] A door seal for a vehicle that seals between a door and a vehicle body, the door seal for a vehicle comprising: a seal base mounted in abutment with a portion of the door; a seal portion of a hollow structure, formed integrally with the seal base portion, and having an abutment portion that abuts against the vehicle body when the door is closed, a portion of the seal portion being crushed and deformed between the door and the vehicle body; a tongue-shaped first lip portion formed integrally with the seal portion and protruding in a predetermined direction from an outer surface of the seal portion; and a tongue-shaped second lip portion that is formed integrally with the seal portion and protrudes in a direction that is different from a protruding direction of the first lip portion and is orthogonal to an immersion direction of water that reaches from a gap between the door and the vehicle body.

[2] The vehicle door seal according to the above [1], wherein the seal base is attached along a peripheral edge of a door rear portion of a door on a rear seat side of a passenger vehicle.

[3] The door seal for a vehicle as recited in the item [1] or [2], wherein a distal end of the second lip portion is curved toward the direction of entry of the water, and the second lip portion is curved in a concave shape as a whole.

[4] The vehicle door seal according to any one of [1] to [2], wherein at least a portion of the seal portion is in contact with the second lip portion, and the seal portion is formed to be thicker in a portion located directly opposite to the water entry direction than in other portions.

[5] The door seal for a vehicle according to any one of [1] to [4], wherein the seal portion is formed such that the abutment portion is thinner than other portions.

Effects of the invention

According to the seal of the present invention, the plurality of lips including the first lip and the second lip can alleviate the impact of the injected water by the second lip even when the high-pressure washer or the like injects high-pressure water, and can further convert the impact pressure received by the second lip to the non-hydraulic pressure, thereby maintaining high sealing performance.

In particular, by mounting the seal member of the present invention on the rear door of the rear seat side door, the seal member is selectively arranged particularly at a portion where water is likely to enter, and thus, the entry of water or the like into the vehicle interior can be effectively suppressed.

Drawings

Fig. 1 is a schematic explanatory view showing a mounting position of a seal according to the present embodiment.

Fig. 2 is a sectional view showing a schematic structure of the seal.

Fig. 3 is an explanatory view schematically showing an example of water stopping of the sealing member.

Fig. 4 is a sectional view showing a schematic structure of a conventional seal.

Description of the symbols

1. 100, and (2) a step of: sealing member (vehicle door sealing member)

2: peripheral edge

3. 101: sealing base

3 a: bottom part

3b, 3 c: foot part

3 d: hollow part

4. 102: sealing part

4a, 102 a: outer surface

5: first lip part

5 a: first lip tip

6: second lip

6 a: water-bearing part

6 b: second lip tip

7: abutting part

8: raised part

103: lip part

B: vehicle body

C: passenger car

D: door with a door panel

F1, F2: force of

H: extent of shadow

R: bow shape

RD: rear part of door

RP: rear pillar

S: pressure of water stop

W: water (W)

W1, W2: water diversion flow

WF: direction of immersion

X: direction of protrusion

Y: direction of protrusion

Detailed Description

Hereinafter, embodiments of a seal (vehicle door seal) according to the present invention will be described with reference to the drawings. The seal member of the present invention is not limited to the following embodiments, and various design changes, modifications, improvements, and the like may be applied without departing from the scope of the present invention.

As shown in fig. 1 to 3, a seal 1 according to an embodiment of the present invention is attached along a peripheral edge 2 of a door D of a passenger car C to prevent water or the like from entering the vehicle interior. In particular, the seal 1 of the present embodiment is mounted along the peripheral edge 2 of the door rear portion RD of the rear seat side door D of the passenger vehicle C. Here, as shown in fig. 1, the door rear portion RD of the door D corresponds to a portion that abuts against the rear pillar RP of the passenger car C and the vehicle body B on the rear side, which is provided in connection with the rear pillar RP.

To explain a specific structure of the seal 1 of the present embodiment, the seal 1 mainly includes: a sealing base 3 installed along the periphery 2 of the door rear portion RD, a sealing portion 4 having a hollow structure, a tongue-shaped first lip 5, and a second lip 6 having a different protruding direction from the first lip 5.

The seal 1 of the present embodiment is configured such that: the above-described structures are integrally formed by extrusion molding of a resin material that is elastically deformable under stress, and the entire structure is long. Fig. 2 shows a cross-sectional shape of the seal 1 cut along a plane perpendicular to the longitudinal direction thereof. The resin material constituting the seal material 1 is not particularly limited, and for example, a resin material mainly composed of ethylene-propylene-diene rubber (hereinafter referred to as "EPDM") can be suitably used.

Next, describing each structure of the seal member 1 in further detail, the seal base 3 is formed to have: a flat plate-shaped bottom portion 3a attached along the peripheral edge 2 of the door D; and a pair of

legs

3b and 3c standing from the bottom portion 3a, and the seal base portion 3 includes a hollow portion 3d having a substantially rectangular shape surrounded by the bottom portion 3a, the pair of

legs

3b and 3c, and a bottom surface of the seal portion 4 described later.

Further, a raised portion 8 raised outward is formed at each of the connecting portions between the bottom portion 3a and the

leg portions

3b and 3 c. When the seal 1 is mounted by being placed on the peripheral edge 2 of the door D, a gap is formed between the door D and the bottom portion 3a of the seal base 3 by the raised portion 8. The peripheral edge 2 of the door D and the seal base 3 can be fixed to the bottom portion 3a via a known fixing means (not shown) such as a clip. The structure of the seal base portion 3 is not particularly limited to the structure having one hollow portion 3D as described above, and may be any structure that can be brought into contact with the door D when the seal 1 is attached to the door D.

On the other hand, a part of the seal portion 4 is joined to the upper ends of the pair of leg portions 3B and 3c of the seal base portion 3, and has a hollow tubular structure formed by combining a plurality of curved lines and straight lines, and a contact portion 7 that comes into contact with a part of the vehicle body B when the door D is closed is provided at a position (left side of the paper surface in fig. 2) apart from the seal base portion 3, and the part of the vehicle body B faces the door D.

Here, the contact portion 7 has a structure in which: in a state where no force is applied to the seal portion 4, in other words, in a state where the door D is opened, both sides constituting the contact portion 7 are bent at one point. When the door D is closed from this state, the abutting portion 7 of the seal portion 4 comes into contact with the vehicle body B, and is further pressed toward the door D by the vehicle body B, whereby the seal portion 4 is pressed flat and elastically deformed.

That is, the overall shape of the seal portion 4 changes. At this time, as shown in fig. 3, for example, the bent contact portion 7 has a slightly enlarged bending angle compared to the original shape (see fig. 2), and the shape of the seal portion 4 slightly changes in the longitudinal direction. Fig. 3 is a cross-sectional view showing a state in which the door D is closed and the seal portion 4 (seal 1) is deformed.

Since the seal 1 of the present embodiment is made of an elastically deformable resin material as described above, the elastically deformed seal portion 4 generates an elastic reaction force to return to its original shape. Therefore, the contact portion 7 of the seal portion 4 and the vicinity thereof generate a force F1 (see fig. 3) in a direction of pushing back the vehicle body B. As a result, the contact portion 7 between the vehicle body B and the seal portion 4 is further firmly adhered. This restricts the flow of water W between the vehicle body B and the seal portion 4 (contact portion 7). That is, the sealing property of the water W on the vehicle body B side is exhibited.

As shown in fig. 2, the first lip 5 of the seal 1 of the present embodiment is formed to protrude in an oblique direction from the outer surface 4a of the seal portion 4 in the vicinity of the connection portion between the one leg portion 3c of the seal base portion 3 and the seal portion 4. Here, when the seal 1 is attached to the door D, the first lip 5 is held in a state in which the first lip tip 5a is pressed by a part of the door D and bent toward the seal portion 4 side. At this time, an elastic reaction force to restore the original shape is generated in the first lip 5. Therefore, a force F2 (refer to fig. 3) is generated in the first lip tip 5a of the first lip 5 in a direction away from the seal portion 4 and to press the door D. As a result, the door D and the first lip 5 are further firmly adhered to each other. Thereby, the water W is restricted from flowing between the door D and the first lip 5. That is, the sealing property of the water W on the door D side is exhibited. Further, the structure of the first lip 5, its operation effect, and the like are known.

As shown in fig. 2 and 3, the seal 1 of the present embodiment is further provided with a tongue-shaped second lip portion 6, and the second lip portion 6 is formed integrally with the seal portion 4 and protrudes in a predetermined direction from the outer surface 4a of the seal portion 4. That is, the seal 1 of the present embodiment is characterized by having two lips (the first lip 5 and the second lip 6) whose protruding directions are different from each other in the seal portion 4. As shown in fig. 2, the second lip 6 is different from the first lip 5 in the projecting direction X (see fig. 2), and projects in a direction (projecting direction Y (see fig. 2)) substantially orthogonal to the immersion direction WF (see fig. 3) of the water W that has entered the gap between the door D and the vehicle body B and reached the seal 1.

With the second lip 6 having this configuration, the water W entering through the gap between the door D and the vehicle body B reaches a part of the second lip 6 (water receiving portion 6a) disposed to face the entering direction WF of the water W. This allows the second lip 6 to receive the pressure of the high-pressure jet water W. Here, in the case of the conventional seal 100 (see fig. 4), since the second lip 6 is not present, a part of the seal portion 102 directly receives the pressure of the water W.

This allows the pressure of the water W to be relaxed by the second lip 6, and therefore the pressure of the water W is not directly transmitted to the seal portion 4. Further, since the second lip portion 6 is provided along the direction orthogonal to the immersion direction WF of the water W, the water W reaching the second lip portion 6 dispersedly flows in multiple directions at the reaching position of the water W. That is, the water W colliding with the second lip 6 flows dispersedly toward the vehicle body B and the door D, for example (see the diversion water W1, W2 in fig. 3). The direction of the dispersed flow is not limited to fig. 3, and the dispersed flow may be distributed in all directions from the arrival position of the water W such as the depth direction of the paper surface and the near-front direction of the paper surface in fig. 3.

This can reduce the pressure (impulse) of the water W. As a result, even if the high-pressure water W injected from the high-pressure washer or the like reaches the seal 1, the seal portion 4 is not deformed, and the close contact state between the vehicle body B and the contact portion 7 of the seal portion 4 and the close contact state between the door D and the first lip 5 are not changed. Therefore, the sealability of the water W is maintained. In addition, since the water W that reaches the second lip 6 flows dispersedly in multiple directions, the amount of water W that is going to flow at a time between the vehicle body B and the abutting portion 7 (or the door D and the first lip 5) decreases. Therefore, the sealing property of the water W is further maintained.

Further, the second lip 6 receives the pressure of the water W, and generates a force that presses the contact portion 7 of the seal portion 4 against the vehicle body B by the impact thereof. That is, the impact pressure of the water W received by the second lip 6 is converted into the water stop pressure S of the sealing portion 4 (see fig. 3). As a result, the sealing performance of the seal 1 is higher.

As described above, even when the water W of the high-pressure washer or the like is sprayed, the seal 1 of the present embodiment can have high sealing performance similar to or higher than that of the conventional art. In particular, in terms of vehicle structure, the seal 1 of the present embodiment is used along the peripheral edge 2 of the door rear portion RD of the rear seat side door D into which the water W sprayed at high pressure is likely to infiltrate, thereby enabling a high effect to be achieved.

As shown in fig. 2 and the like, in the seal 1 of the present embodiment, the second lip distal end 6b is slightly curved in the water W entering direction WF, and the second lip 6 is entirely curved in a concave shape. That is, the water receiving portion 6a of the second lip 6 is formed of a curved surface. Thus, as shown in fig. 2, the second lip 6 has an arcuate shape R as a whole in the sectional shape. By providing the second lip 6 having the arcuate shape R with respect to the immersion direction WF of the water W, the force against the pressure of the water W becomes further high. As a result, even when the seal 1 directly receives the high-pressure water W injected from the high-pressure washer, the seal portion 4 is not deformed, and a stronger water stop pressure S is generated, so that high sealing performance can be maintained. This can prevent water W from entering the vehicle interior, and can ensure comfort in the vehicle interior.

The seal portion 4 of the seal 1 of the present embodiment is formed such that at least a part thereof is in contact with the second lip 6 and a portion (see a hatched area H in fig. 2) located directly opposite to the water W immersion direction WF is thicker than other portions. As described above, the portion located in the shaded area H is in contact with the water receiving portion 6a of the second lip 6, which receives the impact of the high-pressure water W, and is located at a position where the water receiving portion 6a is supported from the rear (corresponding to the opposite side of the outer surface of the water receiving portion 6 a).

Therefore, by forming this portion thicker than other portions, even when the second lip 6 (water receiving portion 6a) receives high-pressure water W, the second lip 6 can be supported by this portion and can resist the high-pressure water W. That is, the deformation of the seal portion 4 can be prevented. This can maintain high sealing performance.

The seal portion 4 of the seal 1 of the present embodiment may be formed so that the contact portion 7 is thinner than other portions. With this configuration, the contact portion 7 between the vehicle body B and the seal portion 4 can be in contact with each other without a gap. Here, if the thickness of the contact portion 7 and its vicinity is made thick, the adhesion between the vehicle body B and the contact portion 7 is reduced. In particular, there is a possibility that a gap formed at an acute angle is generated between the vehicle body B and the abutting portion 7. When such a gap having an acute angle is formed, water W is likely to enter the gap, and the water W is likely to pass between the vehicle body B and the contact portion 7 and leak into the vehicle interior. In order to solve this problem, in the present embodiment, the thickness of the contact portion 7 is made slightly smaller than that of other portions, so that the gap forming the acute angle can be avoided.

As described above, the seal 1 of the present embodiment further includes the second lip portion 6 which protrudes in the direction orthogonal to the immersion direction WF of the water W, unlike the protruding direction of the first lip portion 5 which is provided, and thereby can effectively suppress the water W from being immersed into the vehicle interior due to the injection of the high-pressure water W. In particular, in terms of the vehicle structure, the seal 1 of the present embodiment is applied to the door rear portion RD of the rear seat side door D where water W is likely to enter between the vehicle body B and the door D, and thereby higher sealing performance can be exhibited.

The seal of the present invention is not limited to the structure mounted on the door rear portion RD as described above, and can be suitably applied to various places such as the front seat side as needed. Further, the relative angle between the projecting direction Y of the second lip 6 and the projecting direction X of the first lip 5 can be arbitrarily set. The arcuate shape R (curvature) of the second lip portion 6 can be set arbitrarily according to the type of resin material used for the seal, the elastic reaction force, the size of the seal, and the like.

Industrial applicability

The seal (vehicle door seal) of the present invention can be attached to doors, body openings, and the like of various vehicles such as passenger cars, industrial vehicles, agricultural vehicles, and the like, and is expected to have a possibility of being used in other various industrial technical fields.

Claims

1. A door seal for a vehicle that seals between a door and a vehicle body, the door seal for a vehicle comprising:

a seal base mounted in abutment with a portion of the door;

a seal portion of a hollow structure, formed integrally with the seal base portion, and having an abutment portion that abuts against the vehicle body when the door is closed, a portion of the seal portion being crushed and deformed between the door and the vehicle body;

a tongue-shaped first lip portion formed integrally with the seal portion and protruding in a predetermined direction from an outer surface of the seal portion; and

a tongue-shaped second lip portion that is formed integrally with the seal portion and protrudes in a direction that is different from a protruding direction of the first lip portion and that is orthogonal to an immersion direction of water that reaches from a gap between the door and the vehicle body.

2. The vehicle door seal according to claim 1, wherein,

the sealing base is mounted along the periphery of the door rear portion of the door on the rear seat side of the passenger vehicle.

3. The door seal for a vehicle according to claim 1 or 2, wherein,

a second lip tip of the second lip portion is bent toward an immersion direction of the water,

the second lip portion is curved concavely as a whole.

4. The door seal for a vehicle according to claim 1 or 2, wherein,

at least a part of the seal portion is in contact with the second lip portion, and the seal portion is formed to be thicker at a portion located directly opposite to the water immersion direction than at other portions.

5. The door seal for a vehicle according to claim 1 or 2, wherein,

the sealing portion is formed such that the abutting portion is thinner than the other portions.