JP2001277957A - Trim and seal part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trim and a seal part capable of being manufactured at a low cost, and suppressing an increase in an insertion load and a reduction in a falling-out load at a lip having small projecting length. SOLUTION: In an opening trim weather strip 11, head portions 19a to 19c are bulged out toward an inner portion 17 side at a tip end of holding lips 18a to 18c in a trim main body 12. The length of the holding lips 18a to 18c projecting from an inside surface 16 of a vehicular interior side wall part 15 is inversely proportional to the length and thickness of head portions projecting from an end surface of a tip end portion 18d of the holding lips 18a to 18c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trim used for a sealing part such as a weather strip of a vehicle, a decorative part, a covering part of a flange of a vehicle body panel and the like, and a sealing part having the trim.

[0002]

2. Description of the Related Art As this kind of trim, for example, as shown in FIG. 9, there is known a trim in which a trim main body 101 is formed of a polymer material such as rubber or resin and has a substantially U-shaped and long cross section. ing. A metal insert member 102 is embedded in the trim main body 101. The trim main body 101 extends on one inner side surface 103 in the longitudinal direction of the trim main body 101 and has
A holding lip 105 extending toward the inner side 104 is protruded. Inner surface 1 facing this inner surface 103
A plurality of holding ridges 107 extending in the longitudinal direction of the trim main body 101 are provided on the 06 (first conventional configuration).

When the trim main body 101 is mounted on a flange 108 of a vehicle body panel such as an opening of a vehicle, the flange 108 is inserted between the holding lip 105 and the holding ridge 107. Thereby, the holding lip 1
05 is elastically deformed, and the flange 108 is held between the holding lip 105 and the holding ridge 107.

[0004] As a sealing component having the trim main body 101, for example, an opening trim weather strip (hereinafter simply referred to as "weather strip") 110 as shown in Fig. 9 is also known. That is, it has a trim part 111 composed of the trim body 101 of the first conventional configuration, and a hollow seal part 113 made of, for example, sponge rubber is formed on one outer surface 112 of the trim part 111. ing.

The weather strip 110 is mounted on a flange 108 such as an opening of a vehicle at a trim portion 111 thereof. A door 114 for opening and closing the opening is provided.
By pressing the seal portion 113 so as to be elastically deformable, the inside and outside of the vehicle compartment are sealed with the door 114 closed.

[0006]

However, the number of the steel plates to be superimposed on the flange 108 of the opening differs depending on the location, and the thickness may vary greatly depending on the location. For this reason, in the portion where the thickness of the flange 108 is large, the amount of wrap between the flange 108 and the holding lip 105 becomes excessive. And the weather strip 110
In some cases, the insertion load of the trim portion 111 into the flange 108 greatly increases, and mounting of the weather strip 110 may become difficult.

In order to deal with such a problem, the first
In the conventional weather strip 110, as shown by a two-dot chain line in FIG. 10, the holding lip 105 corresponding to the thick flange 108 is cut small according to the thickness of the flange 108 to reduce the insertion load. I have to. However, the conventional weather strip 110
Then, a step of cutting the holding lip 105 is necessary,
In addition, there is a problem in that the user has to search for a cut portion and mount the device while positioning the device.

On the other hand, for example, British Patent GB
No. 2,133,823 discloses a weather strip 11.
A configuration is disclosed in which the length of protrusion of the holding lip 105 from the inner side surface 103 (hereinafter, referred to as “lip protrusion length”) is changed in the extension direction of the weather strip 110 at the time of extrusion molding of No. 0 (second). Conventional configuration).

However, in this second conventional configuration,
In the shortest and shortest holding lip 105a, an increase in rigidity at the base end 115 is unavoidable due to the relationship between the lip protrusion length and the thickness. For this reason, the flange 1
08 when the shortest holding lip 105a is inserted.
Is elastically deformed exclusively at the tip end portion 116. Thereby, in the shortest holding lip 105a, the degree of freedom in setting the insertion load and the removal load with respect to the flange 108 is reduced. Therefore, the second conventional configuration has a problem that the product yield is reduced and the manufacturing cost is increased.

[0010] Also, JP-A-10-6379 discloses that
When the weather strip 110 is extruded, the holding lip 1
A configuration is disclosed in which the lip projection length or thickness of the entire 05 is changed in the extending direction of the weather strip 110 (third conventional configuration). In this third conventional configuration,
The portion corresponding to the flange 108 having a larger thickness has a smaller lip projection length of the entire holding lip 105a. Further, the thickness of the entire holding lip 105a is made smaller at a portion corresponding to the flange 108 having a larger thickness. For this reason, in a portion corresponding to the flange 108 having the large thickness, the insertion load on the flange 108 can be reduced.

However, in particular, the holding lip 105a
When the overall thickness is reduced, the holding lip 10
The rigidity of the whole 5a may be significantly reduced. If the rigidity of the entire holding lip 105a is significantly reduced, the load on the flange 108 is also reduced, and the weather strip 110 is easily detached from the flange 108.

The present invention has been made by paying attention to such problems existing in the prior art. An object of the present invention is to provide a trim and a seal component which can be manufactured at low cost and can suppress an increase in insertion load and a decrease in pull-out load in a lip having a small protrusion length.

[0013]

In order to achieve the above object, the invention according to claim 1 of the present application is directed to a trim main body made of a polymer material bent in a substantially U-shaped cross section, and the trim main body. A lip protruding from the inner surface of the trim body and having a protruding length varying from the inner surface in the longitudinal direction of the trim body. The ridge is formed so that the cross-sectional area of the ridge changes in accordance with the projection length of the lip.

With this configuration, when the trim main body is mounted on the adherend, the ridge elastically deforms along with the lip along the adherend. Therefore, when the trim main body and the adherend are to be separated from each other, it is necessary to reverse the ridge, and it is possible to increase a detachment load required for separating the ridge. Here, since the ridge bulges toward the depth side of the trim main body, the insertion load when the trim main body is mounted on the adherend hardly increases. That is, it is possible to suppress a decrease in the detachment load without increasing the insertion load at the time of mounting.

In particular, as the lip protrusion length of the lip becomes smaller, the rigidity of the base end portion of the lip increases, so that the effect of the ridge becomes remarkable. Then, it is not necessary to form the lip of the shortest portion having the smallest lip protrusion length with high precision, and the manufacturing cost is reduced.

According to a second aspect of the present invention, in the first aspect of the present invention, the ridge is formed such that the cross-sectional area of the ridge increases as the projection length of the lip decreases. It is characterized by having been formed.

Here, the rigidity of the base end portion of the lip increases as the lip projection length becomes smaller. However, the configuration according to the second aspect of the present invention increases the insertion load at the time of mounting. In addition, the drop of the detachment load is more effectively suppressed.

According to a third aspect of the present invention, in the second aspect of the present invention, as the length of the ridge from the inner surface of the lip becomes smaller, the length of the ridge becomes smaller. And at least one of the thicknesses on the inner surface side is formed to be large.

With this configuration, the operation of the invention described in claim 2 can be realized with a simple configuration.
The invention described in claim 4 of the present application is the invention according to any one of claims 1 to 3, wherein the lip is provided with a trim main body at a shortest portion where the protruding length is the smallest. The length Li on the back side and the length Lo on the opening side of the trim main body are formed so as to satisfy the following relationship. 0 ≦ Lo ≦ Li / 2 With such a configuration, in the shortest portion lip, the depth Lo on the opening side can be set small while securing a predetermined length Li on the deep side. Accordingly, even at the base end of the shortest lip, a flexible portion having a substantially triangular cross section that can be elastically deformed along the adherend when the trim body is attached to the adherend is provided on the distal end side. Can be. Thereby, the rigidity at the base end of the shortest lip can be appropriately reduced. When the trim body is mounted on the adherend, the increase in the insertion load is effectively suppressed, and a predetermined amount of wrap between the lip and the ridge and the adherend is secured, and the reduction in the detachment load is effectively reduced. Is suppressed.

According to a fifth aspect of the present invention, a trim is provided at an edge of an opening of a vehicle body corresponding to an opening / closing body of a vehicle, and a trim portion sandwiching the edge is pressed against the opening / closing body. A seal part comprising: a seal part capable of being elastically deformed by the trim part, wherein the trim part is made of the trim according to any one of claims 1 to 4.

According to the fifth aspect of the present invention, in a sealing part which is mounted on a vehicle and seals the inside and outside of the vehicle interior, a decrease in a detachment load is suppressed without increasing an insertion load when the trim portion is mounted. The claim 1, such as being able to
According to the fourth aspect of the present invention, the effects of the invention can be realized.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a weather strip (opening trim weather strip) mounted on the periphery of a side door opening in a vehicle will be described below with reference to FIGS. explain.

As shown in FIGS. 1-3, 5 and 6,
The weather strip 11 as a sealing component is, for example, E
PDM (Ethylene / propylene / diene terpolymer)
It has a trim main body 12 as a trim part made of solid rubber and having a substantially U-shaped cross section, and a hollow seal part 13 made of EPDM sponge rubber, and is formed in a long shape.

A metal insert member 14 for reinforcing the trim main body 12 is embedded in the trim main body 12. The insert member 14 is embedded with a plurality of bone pieces or a plurality of bone pieces connected to each other via a thin bridge portion so that the trim main body 12 can be bent two-dimensionally or three-dimensionally. , And can be bent.

On the inner side surface 16 of the vehicle interior side wall portion 15 of the trim main body 12, a holding lip as a lip extending in the longitudinal direction of the trim main body 12 and extending toward the inner side 17 of the trim main body 12 is provided. 18 are protruded. At the tip of the holding lip 18, a head 19 is provided as a ridge extending in the longitudinal direction of the trim main body 12 and extending toward the deep portion 17 of the trim main body 12.

On the other hand, a plurality of holding projections 22 extending in the longitudinal direction of the trim main body 12 are provided on the inner side surface 21 of the vehicle outer side wall portion 20. The seal portion 13 is integrally formed on the outer surface 23 of the vehicle outer side wall portion 20. Here, when the trim main body 12 is mounted on a flange 28 of a vehicle body panel 27 which forms an edge of a side door opening 26 as an opening of the vehicle body of the vehicle, and the side door 29 as an opening / closing body is closed, this seal is formed. The portion 13 elastically contacts the outer peripheral portion of the door frame 30. Thus, the interior and exterior of the vehicle are sealed with the side door 29 closed.

In this embodiment, the weather strip 11 is provided with the holding lip 18 in its longitudinal direction.
Are divided into three parts by the length of the lip protruding from the inner side surface 16 of the vehicle inner side wall portion 15. That is, the longest portion 32 where the lip projection length of the holding lip 18 is the longest (see the holding lip 18a shown by a broken line in FIG. 3 and FIG. 5) is formed so that the lip projection length is approximately at the middle. The intermediate portion 33 (see the holding lip 18b shown by a solid line in FIG. 3) and the shortest portion 34 having the smallest lip protrusion length (see the holding lip 18c shown by a dashed line in FIG. 3 and FIG. 6). Is divided into And each part 32-34 is formed continuously via the gradually changing area 35. In the gradually changing section 35, the holding lip 18a
Reference numeral 18c denotes each of the portions 32 to 3 whose lip protrusion lengths are adjacent.
It is formed so as to change gradually between the four.

The lip projection lengths of the holding lips 18a to 18c in the respective parts 32 to 34 are shown in FIGS.
As shown in FIG. 6, the weather strip 11 is set according to the thickness of the entire flange 28 facing the holding lips 18a to 18c in a state where the weather strip 11 is mounted on the flange 28 of the vehicle body panel 27. Here, this flange 28
Depending on the location, the number of superposed steel plates constituting the vehicle body panel 27 is different, and the thickness is also different. In each of the holding lips 18a to 18c, the distal end 18d has the same substantially triangular shape, and the length of the proximal end 18e is different. In the holding lip 18c of the shortest portion 34, the distal end portion 18d and the proximal end portion 18e are in a state of being aligned.

The weather strip 1 of this embodiment
In 1, the holding lip 18c at the shortest part 34 is
The length Li on the back portion 17 side is formed in a range of 1 to 8 mm, preferably 2 to 6 mm, and more preferably 2 to 4 mm. On the other hand, the length Lo of the holding lip 18c on the opening 31 side is 0 to Li /
2 (mm), preferably 0 to Li / 3 (mm), more preferably 0 to Li / 4 (mm). Thus, when the weather strip 11 is mounted on the flange 28 of the vehicle body panel 27, a flexible portion that can be elastically deformed along the flange 28 with the insertion of the flange 28 is secured.

In particular, the opening 3 in the holding lip 18c
When the length Lo on one side is set to be substantially 0, the cross-sectional shape of the holding lip 18c becomes substantially triangular. In this case, as shown by a two-dot chain line in FIG. 6, the entire holding lip 18c becomes a flexible portion.

Next, the shapes of the heads 19a to 19c of the holding lips 18a to 18c will be described in more detail. As shown in FIG.
Heads 19a-19 formed on tip 18d of 18c
c has a cross-sectional area that is changed according to the length of each of the holding lips 18a to 18c from the inner side surface 16 of the inner side wall portion 15 in the holding lips 18a to 18c. Here, as for the head portion 19a of the holding lip 18a of the longest portion 32, the protruding length from the end surface of the tip portion 18d of the holding lip 18a (hereinafter, referred to as "the length").
"Head protruding length". ) Is L1 and its head 19
The thickness of a is T1. Similarly, with respect to the head 19b of the holding lip 18b of the intermediate portion 33 and the head 19c of the holding lip 18c of the shortest portion 34, the head protruding length and the wall thickness are defined as L2 and T2, L3 and T3, respectively. . Each of these heads 19a to 19c has the following (1)
It is formed so as to satisfy the expression and the expression (2). L1 <L2 <L3 (1) T1 <T2 <T3 (2) That is, as the lip projection length of each holding lip 18a to 18c decreases, the head projection length of each head 19a to 19c. On the contrary, L1 to L3 and thicknesses T1 to T3 are large. Thereby, as the lip projection length of each of the holding lips 18a to 18c becomes smaller, each of the heads 19a to 19c becomes smaller.
19c is formed such that its cross-sectional area is sequentially enlarged. In FIG. 4, the enlarged amount of the cross-sectional area of each of the heads 19 a to 19 c is greatly exaggerated for easy understanding.

Here, considering the head 19a of the holding lip 18a of the longest part 32 as a reference, the intermediate part 33 and the shortest part 3
In the heads 19b, 19c of the holding lips 18b, 18c of No. 4, the cross-sectional area is enlarged by the hatched portions in FIG. In FIG. 4, the enlarged portions of the cross-sectional areas of the heads 19 b and 19 c are exaggerated for easy understanding. Also, each holding lip 18b,
In 18c, not only the heads 19b and 19c but also the outer peripheral surface is formed so as to bulge outward as a whole.

Next, a method of manufacturing the weather strip 11 will be briefly described focusing on a method of manufacturing the periphery of the holding lip 18. In addition, since the base other than the holding lip 18 uses a conventionally widely used base,
The description is omitted.

Opening for forming the trim main body 12 and the seal portion 1
(3) A die having an opening for molding is attached to the extruder. An unvulcanized EPDM is formed in the opening for molding the trim body 12 together with the elongated insert member 14.
Supply solid rubber. Further, EDPM sponge rubber in an unvulcanized state is supplied to the opening for molding the seal portion 13. Then, the EPDM solid rubber and the EDPM sponge rubber discharged from the die and shaped into a predetermined cross-sectional shape are vulcanized under a predetermined temperature condition, and the weather strip 11 is continuously formed. By cutting the continuously formed weather strip 11 to a predetermined length, one weather strip 11 is formed.

Here, the weather strip 1 of the present embodiment
In 1, the lip projection length of the holding lip 18 is variously changed in the longitudinal direction of the weather strip 11. A base 38 for changing the lip projection length of the holding lip 18
As shown in FIGS. 7 and 9, the first plate 40, the second plate 41, and the cover plate 42 are sequentially superimposed from the extruder 39 side. The first plate 40 has a side wall opening 43 for forming the side walls 15 and 20 of the trim body 12 and a base end 18e corresponding to the holding lip 18a of the longest portion 32. Opening 44 for the base end and the tip 18 including its head 19
A leading end opening 40a for forming d is formed.

On the other hand, in the second plate 41, a slide core 45 that slides along the extension direction of the holding lip 18 (the direction of the double arrow in FIG. 7) is provided. The slide core 45 has a tip opening 46 for forming a tip 18 d of the holding lip 18 and a head 1.
A head forming block 47 for molding 9 is provided.

As shown in FIGS. 7 to 9, the whole head forming block 47 has a substantially rectangular parallelepiped shape, and a groove 49 for allowing the flow of unvulcanized rubber 48 is formed in one end surface thereof. Have been. The upstream side of the groove 49 (the first plate 4
The (0 side) end is a head opening 50 that is opened in a U-shaped cross section. The head forming block 47 closes a part of the front end opening 40 a of the first plate 40, and the head opening 50 is connected to the front end opening 46 of the second plate 41. Are located.

A first relief slope 51 is formed on a side surface 49a of the groove portion 49 on the inner side surface 18f side of the holding lip 18. A second relief slope 52 is formed on the bottom surface 49b of the groove 49. On the other hand, on the side surface 49c of the groove 49 on the outer surface 18g side of the holding lip 18,
A regulating plane 53 is formed continuously with the end face of the opening 40a for the front end of the first plate 40. This outer surface 1
Downstream side of 8g side surface 49c (cover plate 42 side)
Is formed with a stepped portion 54. The presence of the first and second relief slopes 51 and 52 and the step 54 increases the downstream opening area of the groove 49 as compared with the upstream opening area (the opening area of the head opening 50). Have been.

In order to change the lip projection length of the holding lip 18, the slide core 45 is slid in the direction of the double arrow in FIG. 7 to change the opening area of the base end opening 44. That is, when forming the holding lip 18a of the longest portion 32, the slide core 45 is arranged at the position Pf farthest from the side wall opening 43. As a result, the head 19a is extended with respect to the long base 18e.
The holding lip 18a to which the tip portion 18d including the above is joined is formed.

On the other hand, when forming the holding lip 18c of the shortest portion 34, the slide core 45 is arranged at the position Pc closest to the side wall opening 43. This allows
The holding lip 18c joined to the inner side wall portion 15 is formed with the distal end portion 18d and the base end portion 18e substantially aligned.

When the holding lip 18b of the intermediate portion 33 is formed, the slide core 45 is moved to the two positions Pf,
It is arranged at a position Pm in the middle of Pc. This allows the distal end 18d to include the head 19b on the intermediate length base end 18e.
Is formed into the holding lip 18b.

The extruder 39 is provided with a mechanism such as an accumulator for reducing the fluctuation of the extrusion pressure. Therefore, when the weather strip 11 is manufactured, when the slide core 45 is at the position Pc closest to the side wall opening 43 (the position where the holding lip 18c of the shortest portion 34 is formed), the rough pressure fluctuation is reduced. However, the pressure of the unvulcanized rubber 48 in the base end opening 44, the front end opening 46, and the head opening 50 slightly increases.

In this state, the unvulcanized rubber 48 extruded from the base 38 passes along the first and second relief slopes 51 and 52 when passing through the edge portion 55 on the inner side surface 19 d side of the head 19. The shape is formed in a slightly expanded state so as to alleviate the delicate pressure rise. On the other hand, on the outer surface 19e side of the head 19, as described above, the first
The swelling is regulated by the regulating plane 53 which is continuous with the end face of the opening 40a for the distal end of the plate 40. Thereby, the holding lip 18c of the shortest portion 34
In this case, the head 19 expands from the tip to the inner side surface 19d, and the protruding length L3 and the thickness T3 of the head 19 increase. In FIG. 9, for easy understanding, variations in the thicknesses T1 to T3 of the head portion 19 are greatly exaggerated.

On the other hand, when the slide core 45 moves away from the side wall opening 43, the unvulcanized rubber in the base end opening 44, the front end opening 46, and the head opening 50 is reduced. The pressure at 48 drops. For this reason, when the slide core 45 is at the position Pf farthest from the side wall opening 43 (the position where the holding lip 18a of the longest portion 32 is formed), the unvulcanized rubber 48 pushed out from the base 38 is moved to the head 19. The inner side surface 19d is also shaped such that the shape is regulated by the edge portion 55 when passing through the edge portion 55. Thereby, the longest part 32
In the holding lip 18a, the protruding length L1 and the thickness T1 of the head 19 are reduced without the head 19 expanding from the tip to the inner side surface 19d. In this way,
The lip projection length of the holding lip 18 is changed, and the cross-sectional area of the head 19 is fixed in a state changed according to the lip projection length.

Next, the mounting operation of the weather strip 11 configured as described above to the flange 28 of the vehicle body panel 27 will be described. As shown in FIGS. 1 and 3,
The weather strip 11 is fitted in order from a predetermined reference position so that the trim body 12 covers the flange 28. By this fitting operation, the flange 28 is held by the holding lip 1
The holding lip 18 is elastically deformed together with the head 19 along the flange 28 thereof. Then, due to the elastic deformation of the holding lip 18 and the head 19, the flange 28 is held between the holding lip 18 and the holding ridge 22.

Therefore, according to the present embodiment, the following effects can be obtained. (A) In this weather strip 11, the holding lip 1
A head 19 swelling toward the back 17 of the trim main body 12 is provided on the tip 18 d of the head 8. The head 19 is formed such that the cross-sectional area of the head 19 changes according to the lip projection length of the holding lip 18.

Therefore, when the trim main body 12 is mounted on the flange 28, the head 19 is elastically deformed along the flange 28 together with the holding lip 18. In order to separate the trim main body 12 and the flange 28 from this state, the head 19 needs to be turned over. And
Due to the reversal of the head 19, a resistance against a force for separating the head 19 is generated, and a detachment load can be increased.

Here, since the head 19 is bulged toward the deep portion 17 side of the trim main body 12, the trim main body 12
When mounting on the flange 28, the insertion load hardly increases. Therefore, by adjusting the cross-sectional area of the head 19 in accordance with the rigidity of the holding lip 18 itself that varies with the lip projection length, it is possible to reduce the removal load without increasing the insertion load when the trim main body 12 is mounted. Can be suppressed.

(B) By the way, as the lip projection length of the holding lip 18 decreases, the rigidity of the holding lip 18 increases due to the ratio of the lip projection length of the base end portion 18e to the wall thickness. For this reason, when the flange 28 is inserted into the trim main body 12, there is a possibility that the elastically deformed part of the tip portion 18d of the holding lip 18 may be formed. On the other hand, in the weather strip 11, the head 19 is bulged above the tip 18d of the holding lip 18. Moreover, the cross-sectional area of the head 19 is formed so as to increase as the lip protrusion length of the holding lip 18 decreases, by changing the protrusion length and thickness of the head.

As described above, the shorter the lip projection length of the holding lip 18 is, the longer the head projection length of the head 19 is. The amount of wrap between the shaft and the flange 28 is increased. When the trim main body 12 and the flange 28 are to be separated from each other, the amount of reversal of the head 19 is increased, so that a drop in the detachment load can be suppressed.

By increasing the thickness of the head 19 as the lip projection length of the holding lip 18 decreases,
The rigidity of the head 19 is increased. And when it is going to separate the trim main body 12 and the flange 28,
It is difficult for the head 19 to be turned over, and it is possible to suppress a decrease in the load to be removed.

As described above, as the lip projection length of the holding lip 18 becomes smaller, the tip portion 18d of the holding lip 18 becomes smaller.
The effect of the head 19 provided above becomes significant. The adjustment of the insertion load and the removal load at the holding lip 18c in the shortest portion 34 can also be performed on the head 19c. Therefore, it is not necessary to form the holding lip 18c at the shortest portion 34 with such high precision.
1 can reduce the manufacturing cost.

(C) In this weather strip 11,
The holding lip 18c of the shortest part 34 in the trim body 12 is
The length Lo of the opening 31 side is equal to the length L of the back portion 17 side.
It is formed to be less than half of i.

For this reason, the holding lip 18c of the shortest part 34
In this case, the length Lo on the opening 31 side can be set small while securing a predetermined length Li on the back portion 17 side. Thereby, even in the holding lip 18c of the shortest portion 34, the trim main body 12
A flexible portion having a triangular cross section which can be elastically deformed along the flange 28 when the is mounted on the flange 28 of the vehicle body panel 27 can be provided.

When the trim body 12 is mounted on the flange 28, a predetermined lap amount is secured between the holding lip 18c and the flange 28, and the rigidity of the holding lip 18c is ensured by the presence of the flexible portion. Is moderately reduced. This suppresses an increase in the insertion load and a decrease in the removal load. Therefore, regardless of the thickness of the flange 28, the weather strip 11 is
Can be held more reliably.

(D) In the weather strip 11,
The holding lip 18c at the shortest portion 34 is formed to have a substantially triangular cross section. That is, in the holding lip 18c of the shortest portion 34, the length Lo on the side of the opening 31 is set to be substantially zero.

For this reason, the holding lip 18c of the shortest part 34
Then, the whole becomes a flexible portion having good flexibility.
Thus, when the trim main body 12 is mounted on the flange 28, an increase in the insertion load of the trim main body 12 can be suppressed more effectively. Therefore, the trim body 12
Can be further improved on the flange 28.

(Modification) The above embodiment may be modified as follows. In the above embodiment, the weather strip 11 is
The head forming block 47 may be formed by sliding diagonally downward and to the left in FIG. In this case, the head projection length of the head 19 of the holding lip 18 can be changed more accurately.

In the above embodiment, the holding lip 18c at the shortest portion 34 may be formed such that the length Li on the back portion 17 side and the length Lo on the opening portion 31 satisfy the following relationship. Li / 2 ≦ Lo ≦ Li (3) In this case, the rigidity of the base end portion 18e of the holding lip 18c at the shortest portion 34 is slightly increased. However, by setting the lip projection length of the holding lip 18c to be slightly smaller, the insertion load and the removal load of the holding lip 18c with respect to the flange 28 can be set so as to avoid the effect of the increase in rigidity at the base end 18e. In addition, the adjustment can be easily performed by adjusting the sectional area of the head 19c on the tip 18d. Thereby, the degree of freedom of design is increased, and the manufacturing cost of the weather strip 11 can be reduced.

In the above embodiment, each holding lip 18
In the heads 19a to 19b a to 18c, the head protrusion lengths L1 to L3 and the wall thicknesses T1 to T3 are simultaneously changed. On the other hand, the head protrusion lengths L1 to L
3 or only the thicknesses T1 to T3 may be changed.

In the above-described embodiment, the present invention is embodied in the weather strip 11 in which the holding lip 18 is provided only on the inner surface 16 of the inner side wall portion 15. On the other hand, according to the present invention, the weather strip 11 in which the holding lip 18 protrudes from the inner surface 21 of the vehicle outer side wall portion 20 or the holding lip 18 is formed in the inner side surface 16 of the both side wall portions 15 and 20.
Weather strip 11 protruding so as to face 21
May be embodied. Also, one side wall portion 15,
20 may be embodied in a weatherstrip 11 having a plurality of holding lips 18 protruding therefrom.

In the above embodiment, the holding ridge 22
May be omitted. In the above embodiment, the trim main body 12 may be made of a soft resin such as a thermoplastic elastomer or polyvinyl chloride. Further, the insert member 14 in the trim main body 12 may be omitted.

In the above-described embodiment, the present invention is embodied in the weather strip 11 mounted on the flange 28 of the side door opening 26 of the vehicle. However, for example, the opening of the vehicle such as a back door, a trunk, a sunroof, a hood, etc. May be embodied as a weatherstrip mounted on a flange on the periphery of the rim. Further, the present invention may be embodied as a trim for covering a flange of a vehicle body or the like, for example, for improving decorativeness.

In this case, substantially the same effects as in the above embodiment can be obtained.

[0065]

As described above in detail, according to the first and second aspects of the present invention, the lip having a small protrusion length can be used to reduce the removal load without increasing the insertion load at the time of mounting. The decrease can be significantly suppressed.
In addition, it is not necessary to form the lip at the shortest portion with high precision, and it is possible to reduce the manufacturing cost.

According to the third aspect of the present invention, the effect of the second aspect can be realized with a simple configuration. According to the invention described in claim 4 of the present application, in addition to the effects of the inventions described in claims 1 to 3, the rigidity at the base end portion of the shortest lip can be appropriately reduced. . Therefore, when attaching the trim main body to the adherend, it is possible to effectively suppress an increase in the insertion load and a decrease in the detachment load.

According to the invention as set forth in claim 5 of the present application, in a sealing part which is mounted on a vehicle and seals the inside and outside of the vehicle, the insertion load at the time of mounting the trim portion can be increased without increasing the insertion load. The effects of the first to fourth aspects, such as suppression of the decrease, can be realized.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a weather strip according to an embodiment of the present invention is mounted on a vehicle.

FIG. 2 is a front view showing the weather strip of FIG. 1;

FIG. 3 is a sectional view taken along line 3-3 of FIG. 2;

FIG. 4 is an explanatory diagram relating to the shape of each holding lip in FIG. 3;

FIG. 5 is a sectional view taken along line 5-5 of FIG. 2;

FIG. 6 is a sectional view taken along line 6-6 of FIG. 2;

FIG. 7 is an enlarged partial front view showing a main part of a base for forming the holding lip of FIGS. 3 to 6;

FIG. 8 is an enlarged perspective view showing the head forming block of FIG. 7;

FIG. 9 is a sectional view taken along line 9-9 of FIG. 7;

FIG. 10 is a sectional view showing a conventional weatherstrip.

[Explanation of symbols]

Reference numeral 11 denotes a weather strip as a sealing part, 12 denotes a trim main body as a trim part, 13 ... a seal part, 16 ... an inner surface, 17 ... a back part, 18, 18a to 18c ... a holding lip as a lip, 19, 19a to 19c. ... Head as a ridge, 26 ... Side door opening as a vehicle body opening, 28 ... Flange forming an edge, 29 ... Side door as an opening and closing body, 31 ... Trim body opening, 34 ... Shortest Department.

Continued on the front page (72) Inventor Keizo Hayashi 1 Nagahata, Ochiai, Kasuga-cho, Nishi-Kasugai-gun, Aichi F-term (reference) 3D024 AA08 AB24

Claims (5)

[Claims] 1. A trim body made of a polymer material bent to have a substantially U-shaped cross section, and a projecting length protruding from an inner surface of the trim body and projecting from the inner surface in the longitudinal direction of the trim body. In the trim having a lip that changes, a ridge that bulges toward the back side of the trim body is provided at the tip of the lip, and the cross-sectional area of the ridge is determined according to the protrusion length of the lip. A trim characterized by being formed to change. 2. The trim according to claim 1, wherein the ridge is formed such that the smaller the length of the protrusion from the inner surface of the lip, the larger the cross-sectional area of the ridge. 3. The ridge is formed such that at least one of the length of the ridge and the thickness of the inner surface increases as the length of the lip from the inner surface decreases. The trim according to claim 2, wherein 4. The lip is formed such that the length Li on the back side of the trim main body and the length Lo on the opening side of the trim main body at the shortest part where the protruding length becomes the minimum satisfies the following relationship. 4. The method according to claim 1, wherein
The trim according to any one of the above. 0 ≦ Lo ≦ Li / 2 5. A vehicle according to claim 1, further comprising: a trim portion disposed at an edge of an opening of the vehicle body corresponding to the opening / closing body of the vehicle, sandwiching the edge, and a seal portion elastically deformable by being pressed against the opening / closing body. A seal component, wherein the trim portion is made of the trim according to any one of claims 1 to 4.