JP4688775B2 - Sealing material sticking structure - Google Patents

Description

  The present invention relates to a sticking structure for a seal member which is formed into a closed annular seal member by bending a string-like seal material inward at a plurality of bent portions, and is attached to a flat seal mounting surface.

  FIG. 7 shows a general seal structure when fitting the male connector 130 and the female connector 140 with the vehicle body panel P interposed therebetween. In this seal structure, an annular seal member 110 is attached to the front surface of the flange portion 120 of the male connector 130 and the male connector 130 is attached to the vehicle body panel P, whereby the seal member 110 is attached to the opening Pa of the vehicle body panel P. The opening Pa is sealed by pressing against the surrounding wall surface, thereby ensuring waterproofness and soundproofing between the engine room E and the vehicle compartment R.

  As shown in FIG. 8, the seal member 110 used in such a seal structure is configured as a rectangular annular body made of a material such as sponge or rubber, and the type thereof is a continuous annular body from the beginning. When a sheet punched out from a sheet is affixed to the flange part 120, and as shown in FIG. 9, it is initially provided as a string-like seal material 110M, and at the stage of affixing to the flange part 120, a string-like seal is provided. The material 110M may be bent inward at the bent portion 110c to form the annular seal member 110 and be attached to the flange portion 120.

  When using the former seal member punched from a sheet as a continuous annular body from the beginning, there is no need for trouble at the assembly stage, but a large mold facility for punching is necessary in the manufacturing process. In addition, there is a problem that the cost of parts increases because there are many material losses.

  On the other hand, the latter material supply stage is string-like, and when it is bent into an annular seal member 110, a string-like seal material 110M is prepared simply by cutting the material sheet to a desired width. Therefore, there is an advantage that a large-sized die equipment for punching is not necessary and material loss is eliminated.

  However, when the seal member 110 is actually attached to the flange portion 120 in the assembly process, the seal member 110 previously attached to the bottom surface of the seal member main body 111 such as sponge or rubber at the stage of the string-like seal material 110M. Since the elastic double-sided adhesive tape 112 is often attached to the flange portion 120, as shown in FIG. 10, the bottom surface on the inner peripheral side is caused by the difference in peripheral length between the inner peripheral side and the outer peripheral side of the bent portion 110c. Due to this, the adhesive quality by the double-sided adhesive tape 112 is deteriorated due to the wrinkles, and the waterproofness and soundproofing properties are sometimes lowered.

  As a method for solving this problem, in general, when bending a non-stretchable string-like body, by providing a notch on the inner peripheral side of the bent portion, the difference in the peripheral length between the inner peripheral side and the outer peripheral side of the bent portion is absorbed. The structure which performs is known (for example, refer patent document 1), and it can be utilized for a sealing member.

FIG. 11 shows an example. For example, as shown to (a), the V-shaped notch 115 is put in the inner peripheral side of the bending plan part 110cy at the stage of the string-like sealing material 110M. Then, when it is bent at the bent portion 110c, the notch absorbs the difference in the peripheral length between the inner peripheral side and the outer peripheral side, so that generation of wrinkles can be prevented.
JP 2004-6126 A

  However, in order to provide the above-mentioned notch 115, although it is still small, since it is necessary to punch with a press die, there exists a problem that extra cost starts.

  In consideration of the above circumstances, the present invention can prevent the generation of wrinkles in the bent portion at low cost without making a notch in the planned bent portion, thereby improving the waterproofness and soundproofing. An object is to provide a sticking structure of a seal member that can be achieved.

  According to the first aspect of the present invention, a string-shaped elastic seal material having a flat bottom surface is bent inward at a plurality of bent portions to form a closed annular seal member, and a flat seal mounting surface is obtained. In the affixing structure of the affixed seal member, a curved surface that absorbs the circumferential length difference between the inner circumference and the outer circumference of the bent part of the seal member is formed at a place where the bent part of the seal member is affixed on the seal mounting surface It is characterized by that.

  Invention of Claim 2 is a sticking structure of the sealing member of Claim 1, Comprising: Gradually curvature toward the outer peripheral side from the inner peripheral side of the location which pastes the bending part of the said sealing member as said curved surface. A convex curved surface or a concave curved surface having a shape obtained by cutting off a part of a conical surface, in which the radius is reduced and the circumferential length is gradually reduced, is formed.

  Invention of Claim 3 is the sticking structure of the sealing member of Claim 1 or 2, Comprising: The non-stretchable double-sided adhesive tape is affixed on the bottom face of the said sealing material, By the double-sided adhesive tape, The seal member is affixed to the seal mounting surface.

  Invention of Claim 4 is the sticking structure of the seal member of any one of Claims 1-3, Comprising: The said seal attachment surface is formed in the front surface of the flange part of a connector, The said seal attachment When the connector is attached to the panel, the seal member attached to a surface is pressed against the wall surface of the periphery of the opening formed in the panel to seal the opening. To do.

  According to the first aspect of the present invention, the curved surface that absorbs the circumferential difference between the inner circumference and the outer circumference of the bent portion of the seal member is formed at the location where the bent portion of the seal member is pasted on the seal mounting surface. Further, it is possible to prevent wrinkles from occurring on the inner peripheral side bottom surface of the bent portion of the seal member. Therefore, it is possible to perform good pasting without a gap, and it is possible to prevent deterioration of waterproof performance and soundproof performance (sound vibration performance).

  Moreover, since the sealing material before pasting should just be prepared as a simple string-like body, a sealing material can be prepared by the simple process of carrying out the straight cut of the material sheet by the predetermined width. Therefore, unnecessary punching such as providing a notch is not required at all, and material loss is eliminated, so that the part cost can be reduced.

  According to the invention of claim 2, as the curved surface, a conical surface in which the radius of curvature gradually decreases and the peripheral length gradually decreases from the inner peripheral side to the outer peripheral side of the portion where the bent portion of the seal member is applied. Since a convex curved surface or a concave curved surface is formed by cutting out a part of the surface, it is possible to perform a smooth pasting without difficulty.

  According to the invention of claim 3, since the non-stretchable double-sided adhesive tape is attached to the bottom surface of the sealing material, and the sealing member is attached to the seal mounting surface by the double-sided adhesive tape, the non-stretchable double-sided adhesive tape However, the bottom surface of the seal member can be uniformly attached to the seal mounting surface while preventing the generation of wrinkles.

  According to the fourth aspect of the present invention, the opening of the panel can be reliably sealed by the sealing member that hardly generates wrinkles. Therefore, when applied as a connector seal for male-female fitting across the vehicle panel that partitions the engine room and the vehicle compartment, it is possible to improve waterproofness and soundproofing between the engine room and the vehicle compartment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 is an exploded perspective view of a panel seal unit mounted on the front portion of the male connector, FIG. 2A is an enlarged view of a main part configuration of the main body of the panel seal unit, and FIG. 2B is FIG. 3) is an enlarged perspective view of the main part of the seal member and the seal mounting surface in the unit.

  As shown in FIG. 1, the panel seal unit 25 is obtained by attaching the seal member 10 to a seal mounting surface 21 provided on the front surface of the flange portion 20 </ b> A of the panel seal unit main body 20 made of a hard resin molded body. . The seal member 10 is configured as a quadrangular annular body having four bent portions (corner portions) 10c, and the seal mounting surface 21 to be mounted is also configured as a square annular flat surface corresponding thereto.

  In this case, the seal member 10 is formed into a closed annular body by bending a string-shaped elastic seal material 10M having a flat bottom surface inward with four bent portions 10c, and a flat seal mounting surface. 21 is attached.

  Here, as shown in FIG. 2 and FIG. 3, the bent portion of the seal member 10 is provided at a position where the bent portion 10 c of the seal member 10 on the seal mounting surface 21 is pasted (in the corner portion of the square seal mounting surface 21). A convex curved surface 22 is formed to absorb the difference in circumference between the inner circumference and the outer circumference in 10c. This convex curved surface 22 is a part of a conical surface where the radius of curvature gradually decreases and the peripheral length gradually decreases from the inner peripheral side to the outer peripheral side of the portion where the bent portion 10c of the seal member 10 is attached. It is formed as a convex curved surface with a shape cut off.

  In addition, as shown in FIG. 3, the seal member 10 can be attached with a non-stretchable double-sided adhesive tape 12 on the bottom surface of the seal body 11 having a rectangular cross section such as sponge or rubber at the stage of the string-like seal material 10M. The double-sided adhesive tape 12 is attached to the seal mounting surface 21.

  When the seal member 10 is affixed in such a configuration, the difference between the circumferential lengths of the inner periphery and the outer periphery of the bent portion 10c of the seal member 10 is applied to the location where the bent portion 10c of the seal member 10 on the seal mounting surface 21 is applied. Since the convex curved surface 22 to be absorbed (curved surface obtained by cutting out a part of the conical surface) is formed, smooth non-stretch double-sided adhesive tape 12 can be applied without difficulty. It is possible to prevent wrinkles from forming on the inner peripheral bottom surface of the bent portion 10c of the seal member 10. Therefore, it is possible to attach a good seal member 10 without a gap, and it is possible to prevent a decrease in waterproof performance and soundproof performance (sound vibration performance).

  Further, since the sealing material 10M before the pasting may be prepared as a simple string-like body, the sealing material 10M can be prepared by a simple process of cutting a material sheet linearly with a predetermined width. Therefore, an extra punching process such as providing a notch as in the prior art is unnecessary and there is no material loss, so that the part cost can be reduced.

  The panel seal unit 25 configured as described above is used by being attached to the front portion of the male connector 30 as shown in FIG. Then, as shown in FIG. 5, by attaching the male connector 30 to the vehicle body panel P that partitions the engine room E and the vehicle compartment R, the seal member 10 is pressed and brought into contact with the peripheral wall surface of the opening Pa of the vehicle body panel P. , Thereby sealing the opening Pa.

  Therefore, as shown in FIG. 6, when the male connector 30 and the female connector 40 are fitted, the waterproof property and the soundproof property between the engine room E and the vehicle compartment R can be improved.

  In addition, although the case where the convex curved surface 22 was provided as a curved surface was shown in the said embodiment, the concave curved surface of the same shape can also be formed.

It is a disassembled perspective view of the panel seal unit to which the seal structure of the embodiment of the present invention is applied. (A) is an enlarged view of the principal part structure of the main body of the panel seal unit, (b) is an enlarged view of arrow A in (a). It is an expansion perspective view of the principal part of the sealing member and seal | sticker attachment surface in the panel seal unit. It is a perspective view which shows the state before mounting | wearing with the same panel seal unit to a male connector. It is a sectional side view which shows the state which attached the male connector which mounted | wore the panel seal unit to the front part to the vehicle body panel. It is side sectional drawing which shows the state which fitted the male connector and the female connector on that. It is sectional drawing which shows the general seal structure in the case of fitting a male connector and a female connector on both sides of a vehicle body panel. It is a perspective view which shows the relationship between the conventional seal member and a seal attachment surface. It is a perspective view which shows a mode that the conventional string-like sealing material is bent inside, and a sealing member is made. It is explanatory drawing of the conventional problem. It is a figure which shows the example of a countermeasure of the conventional problem.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Seal member 10M Seal material 10c Bending part 12 Double-sided adhesive tape 20A Flange part 21 Seal mounting surface 22 Convex curved surface 30 Male connector P Panel Pa Opening

Claims (4)

The elastic seal material in the shape of a rectangular cross section having a flat bottom surface is bent inward at a plurality of bent portions to form a closed annular seal member, and the seal member applied to the flat seal mounting surface is applied. In structure
Affixing a seal member, wherein a curved surface that absorbs a difference in circumferential length between an inner periphery and an outer periphery of the bent part of the seal member is formed at a place where the bent part of the seal member is pasted on the seal mounting surface. Construction. The sticking structure of the seal member according to claim 1,
A shape in which a part of a conical surface is cut off as the curved surface gradually decreases in radius of curvature from the inner peripheral side to the outer peripheral side of the portion where the bent portion of the seal member is pasted. A sticking structure of a seal member, wherein a convex curved surface or a concave curved surface is formed. The sticking structure of the seal member according to claim 1 or 2,
A non-stretchable double-sided adhesive tape is attached to the bottom surface of the sealing material, and the sealing member is attached to the seal mounting surface by the double-sided adhesive tape. . It is the pasting structure of the sealing member according to any one of claims 1 to 3,
The seal mounting surface is formed on the front surface of the flange portion of the connector, and the seal member attached to the seal mounting surface has an opening formed in the panel when the connector is mounted on the panel. A pasting structure of a sealing member, wherein the opening is sealed by being pressed against a peripheral wall surface.

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