JP2770558B2 - Seal member having surface layer and method for forming the surface layer - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a seal member having a surface layer formed on a surface and a method of forming the surface layer, and more specifically, an improved method of attaching a masking material. It is.

<Prior Art> A seal member is used at a joining portion of members for dust protection and waterproofing, and a representative example is a weather strip attached to a vehicle body. The seal member has various shapes depending on the portion to be attached, and a part of the seal member is exposed to the outside. Therefore, recently, a portion (exposed portion) exposed to the outside in order to harmonize colors with surrounding members. Form a colored layer (surface layer).

As a conventional method for forming a colored layer of a sealing member, the surroundings of the colored layer forming area are covered with a masking material such as tape, paper, board, cloth or the like, and the colored layer forming material is sprayed into the colored layer forming area or brushed. To form a colored layer, and then immersed therein to form a colored layer, and after the colored layer forming material has dried, the masking material has been removed (Japanese Utility Model Application Laid-open No. 59-104852).
Reference).

However, in this method, a masking material that can be stuck on the surface of the sealing member must be prepared in advance, and a large number of man-hours are required for setting and removing the masking material. Was. Further, when the shape of the colored layer forming range in the seal member is complicated, or when the shape of the seal member is complicated, it is difficult to set a masking material, or if the masking material is not properly attached, In order to solve this problem, the present applicant has made a proposal as shown in FIG. 6 in order to solve the problem (for example, see Japanese Patent Application No. Hei. 117654). That is, a groove 3 is formed on the surface of a sealing member 1 formed of an elastic material along a section of a colored layer forming area 2. As a method of forming the colored layer 6 on the sealing member 1, the groove 3
The masking material 4 is removed by inserting a masking material 4 into the colored layer forming area 2 and applying a colored layer forming material 5 different from the sealing member 1 to the colored layer forming area 2 to form a colored layer 6. is there.

According to this proposal, the setting and removal of the masking material 4 are easily performed, and the colored layer forming range 2 is clearly defined, so that the colored layer forming material 5 does not spread outside the colored layer forming range. .

<Problems to be Solved by the Invention> However, also in the above proposal, the masking material 4 is separately prepared, and the masking material 4 is inserted into the groove 3 to stand up. 4
Therefore, the present invention further improves the above-mentioned proposal, and proposes a sealing member having a surface layer capable of further saving labor and a method for forming the surface layer. is there.

<Means for Solving the Problems> According to a seal member having a surface layer according to the present invention, in order to achieve the above object, a surface layer of a material different from the seal member is formed on a surface of a seal member formed of an elastic material. And a groove formed along a partition corresponding to an end of the surface layer, and a thin-walled base end capable of being torn off in a state in which an upper portion is protruded outside the groove in a deep portion of the groove. A pair of small lips were formed integrally with each other at the upper end of the groove to support a middle part of the partition and prevent the partition from falling down.

Further, the method for forming the surface layer of the sealing member is as follows. First, a groove is formed on the surface of the sealing member along the division of the surface layer forming area, and a tear is formed in a state in which an upper part is protruded outside the groove at the inner part of the groove. A partition having a removable thin base end is integrally formed, and a pair of small lips are formed at the upper end of the groove to support a middle part of the partition and prevent the partition from falling down, in a facing state. Then, using the partition portion as a masking material, a surface layer forming material different from the seal member is applied to the surface layer forming region to form a surface layer, and then the partition portion is torn off from the deep portion of the groove. The method is adopted.

<Operation> According to the seal member having the surface layer and the method of forming the surface layer according to the present invention, a groove is provided in a portion that divides the surface layer formation range, and a partition that can be used as a masking material is provided in a deep portion of the groove. Since it is integrally formed, it is not necessary to separately prepare a masking material as in the related art. Further, since the partition portion is formed integrally with the seal member, it does not drop off during the formation of the surface layer at all. further,
Since the upper portion of the partition portion protrudes out of the groove, the upper portion can be easily torn off from the thin base end portion by grasping the upper portion. In addition, since the base end of the partition portion is of such a thin-walled shape, but the middle portion thereof is supported by the pair of small lips, the partition portion is prevented from falling down.
The trace of the partition part being torn off from the groove is hidden by the small lip inside the groove, so that the appearance is not impaired.

<Embodiment> A preferred embodiment of the present invention will be described below with reference to FIGS. Here, the same reference numerals are given to portions common to the conventional example, and duplicate description will be omitted.

In the figure, reference numeral 20 denotes a weather strip as a “seal member”. A groove 22 is provided in a portion that divides a coating range (surface layer forming range) 21 of the weather strip 20. The groove portion 22 has small lips 23 facing each other on the surface portion of the weather strip 20, and the back portion 24 is wide.
A partition part 25 is provided at an inner part 24 of the groove part 22 at an upper part 25 thereof.
A is integrally formed with A protruding out of the groove 22. That is, when the weather strip 20 is extruded, the partition 25 is extruded simultaneously with the groove 22. The partition portion 25 has a base end portion 25B which is thinnest as compared with other portions. It should be noted that since the base end portion 25B of the partition portion 25 is of such a thin shape, the middle portion thereof is supported by the pair of small lips 23, so that the partition portion 25 is prevented from falling down.

Next, the procedure of coating (forming a surface layer) will be described. A coloring material (surface layer forming member) 26 is applied to the coating range (surface layer forming range) 21 using the partition 25 provided in advance as a masking material. At this time, since the upper portion 25A of the partition 25 is sufficiently protruded out of the groove 22, the coloring material 26 is not applied to other portions beyond the partition 25. Then, when the color material 26 is dried after being applied, the upper part 25A is grasped by hand, and the partition part 25 is torn off from its base end part 25B. This completes the painting.

As described above, since the partitioning portion 25 as the masking material 4 is integrally formed in advance, there is no work of attaching the masking material 4, and the number of steps can be reduced. Further, since the partition 25 is fixed to the deep portion 24 of the groove 22 and its base end 25B is formed to be the thinnest, after the partition 25 is torn off from the vicinity of the base end 25B, Since the cut portion is hidden in the groove 22 by the small lips 23 facing each other,
Does not impair the appearance.

FIG. 3 shows the weather strip 20 shown in FIG.
Is attached to the door opening 28 (solid line in the figure). When the door 27 is closed in this state (direction A in the figure), the weather strip 20 is pushed by the door 27 and deformed.
Since it is easy to deform at 22 as an inflection point, unreasonable deformation does not occur in the painted part, so that the painted part is not damaged (the state shown by the two-dot chain line in the figure).

FIGS. 4 and 5 show another embodiment of the present invention, in which the weather strip 29 is coated with two partitions 30 (see FIG. 4). . In this embodiment, only the "small lip" is illustrated, and the description using the reference numerals is omitted as in the previous embodiment.

The weather strip 29 is used for a door glass part of a four-door hard top, and is attached to a rear door glass 31 in a state shown by a two-dot chain line in FIG. The weather strip 29 has two grooves 33 which define a coating range (surface layer forming range) 32 on the surface.
33, and partition portions 30, 30 are integrally formed with each other.
Therefore, when the front door is closed (in the direction of arrow B in FIG. 5), the front door glass 34
29 (left half in FIG. 5) is pressed and deformed as shown by the two-dot chain line in the figure. That is, since the groove 33 on the surface of the weather strip 29 assists the deformation, the groove 33 is greatly deformed at the boundary of the groove 33, so that the followability to the glass 31, 34 is improved, and the sealing property is improved. And since the groove 33 becomes an inflection point, the surface layer
The surface layer 35 is not damaged without unreasonable deformation of the surface layer 35.

The coloring process for the weather strip 29 in this example includes:
Except that the coating area 32 is partitioned by the two partitioning sections 30, it is exactly the same as in the above-described example.

Although the weather strips 20 and 29 are used as the sealing members in the above-described embodiment, the present invention is not limited to this.

<Effect of the Invention> The sealing member having a surface layer and the method of forming the surface layer according to the present invention have the contents as described above, and a groove is provided in a region that defines a surface layer formation range. Since the partitioning portion as a masking material is integrally formed in the back portion, there is no need to separately prepare a masking material as in the related art. Further, since the partition portion is formed integrally with the seal member, it does not drop off during the formation of the surface layer at all. Further, since the upper portion of the partition portion projects outside the groove portion, the upper portion can be easily torn off by grasping the upper portion. In addition, since the base end of the partition portion is of such a thin-walled shape, but the middle portion thereof is supported by the pair of small lips, the partition portion is prevented from falling down. The trace of the partition part being torn off from the groove is hidden by the small lip inside the groove, so that the appearance is not impaired.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a sealing member having a surface layer according to an embodiment of the present invention and a state in which the surface layer is formed, and FIG. 2 (A) is an enlarged sectional view of a portion II in FIG. 2 (B) is an enlarged cross-sectional view showing a trace where the partition portion has been removed, FIG. 3 is a cross-sectional view showing a use state of the weather strip shown in FIG. 1, and FIG. 4 is another weather strip. FIG. 5 is an explanatory view showing a use state of the weather strip shown in FIG. 4, and FIG. 6 is a seal having the previously proposed surface layer. It is sectional drawing which shows the state of coloring by a member and its surface layer forming method. 20, 29: Seal member 21, 32: Painted area (surface layer forming area) 22, 33: Groove 23: Small lip 24: Back 25, 30 ... Partition 26: Color material (surface) Layer forming material) 35 Surface layer

Claims (2)

(57) [Claims] 1. A sealing member formed of an elastic material,
Forming a surface layer of a material different from that of the seal member, forming a groove along a partition corresponding to an end of the surface layer, and pulling the upper part of the groove in a state in which an upper part protrudes out of the groove. A partition portion having a thin-walled base end portion that can be torn off is integrally formed, and a pair of small lips that oppose an intermediate portion of the partition portion at the upper end of the groove to prevent the partition portion from falling are formed in opposition. A seal member characterized by the above-mentioned. 2. A method for forming a surface layer of a seal member, wherein a surface layer forming area on the surface of the seal member is partitioned by a masking material, and a material different from the seal member is applied to the surface layer forming area to form a surface layer. A groove is formed on the surface of the seal member along the section of the surface layer forming area, and a deep-walled base end portion that can be torn off in a state in which an upper portion protrudes out of the groove is provided at a depth of the groove. A partition is integrally formed, and a pair of small lips are formed at the upper end of the groove to support a middle part of the partition to prevent the partition from falling down, and a pair of small lips are formed in opposition to each other, and the partition is used as a masking material. Forming a surface layer by applying a surface layer forming material different from the seal member to the surface layer forming area, and thereafter tearing off the partition portion from a deep portion of the groove to form a surface layer of the seal member. Method.