Door weather strip

Abstract

To provide a door weather strip in which proper amount of adhesive agent can be supplied to a proper position of a core punched slit.SOLUTION: A door weather strip comprises: a fitting base part 11 which is attached to a peripheral edge part of a vehicle door 2; a hollow seal part 12 which seals the inside and outside of a cabin; and a core punched slit 15 which is arranged at the fitting base part 11 of an injection molding part 10 where a first opposing face 15l and a second opposing face 15r are bonded at a part of the slit 15. The first opposing face 15l is a protrusion shape and the second opposing face 15r is a recessed shape which can receive the protrusion shape. After making the first opposing face 15l contact with the second opposing face 15r to form an adhesive supply passage w inside thereof, proper amount of adhesive agent G is supplied from an adhesive supply hole 16 communicated thereto to the adhesive supply passage.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a door weatherstrip comprising an extrusion molded portion and an injection molded portion connected together, a mounting base portion to be attached to the peripheral portion of a vehicle door, and a hollow seal portion that is pressed against the vehicle body when the vehicle door is closed to seal the interior and exterior of the vehicle, the mounting base portion of the injection molded portion having a slit for removing a core used to mold the hollow seal portion during injection molding, and a first opposing surface and a second opposing surface opposing each other across the slit are joined by adhesive along at least a portion of the longitudinal direction of the slit. [Background technology]

[0002] An example of this type of door weatherstrip is the door weatherstrip described in Patent Document 1 below. In Patent Document 1, a slit (core removal slit 27) having a detour section 28 that detours around clip insertion hole 21 is formed in the mounting base (base section 16) of the injection molded section (mold molded section 14). The opening width of detour section 28 and the opening width of narrow section 32 of straight section 29 are equal, and detour section 28 is bonded in its entirety. The opposing surfaces sandwiching detour section 28 are vertical walls, and when bonding, for example, an adhesive is applied to the opposing surfaces, and the two opposing surfaces are butted against each other. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2001-114036 A Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, since the adhesive is applied along the opposing surfaces, it is difficult to supply the adhesive to the adhesive supply area without misalignment. In other words, there is a risk that the adhesive will overflow to peripheral areas outside the opposing surfaces, resulting in a poor appearance, or that the adhesive will not be supplied sufficiently to the opposing surfaces, resulting in partial adhesion failure.

[0005] Therefore, the present invention solves the above problem and aims to provide a door weather strip that can supply an appropriate amount of adhesive to an appropriate position relative to the slit for removing the core, and a method for manufacturing the same. [Means for solving the problem]

[0006] To achieve this, the present invention employs the following means. (1) A door weather strip comprising an extrusion molded portion and an injection molded portion connected together, an attachment base portion attached to the peripheral portion of a vehicle door, and a hollow seal portion pressed against the vehicle body when the vehicle door is closed to seal the interior and exterior of the vehicle, the attachment base portion of the injection molded portion having a slit for removing a core for molding the hollow seal portion during injection molding, and a first opposing surface and a second opposing surface opposed to each other across the slit are joined by adhesive at least a portion of the longitudinal direction of the slit, A door weather strip, wherein an adhesive supply hole is formed in a mounting base of the injection molded portion, the adhesive supply hole communicating with an adhesive supply area between the first opposing surface and the second opposing surface. (2) A door weather strip as described in (1), wherein the adhesive supply hole is formed by recessing a portion of either or both of the first opposing surface and the second opposing surface in the direction opposite to the slit. (3) In at least the adhesive supply area, one of the first opposing surface and the second opposing surface has a convex stripe shape, and the other is formed into a concave stripe shape capable of receiving the convex stripe shape of the other surface, The door weather strip according to (1) or (2), wherein, when joined with an adhesive, the mounting surface side edge and the sealing portion side edge of the first opposing surface and the second opposing surface abut, and an adhesive flow path in which the first opposing surface and the second opposing surface are separated from each other is formed along the slit in the middle portion. (4) The door weather strip according to (3), wherein the adhesive supply hole is formed from the mounting surface side edge portion to the adhesive flow path, but does not reach the sealing portion side edge portion. (5) The door weather strip according to (1) or (2), wherein the slit has a non-linear portion. (6) A method for manufacturing a door weatherstrip, comprising: an attachment base formed by connecting an extrusion molding portion and an injection molding portion; and a hollow seal portion which is pressed against a vehicle body when the vehicle door is closed to seal the interior and exterior of the vehicle. The attachment base of the injection molding portion has a slit for removing a core for molding the hollow seal portion during injection molding. A first opposing surface and a second opposing surface which face each other across the slit are joined by adhesion at least in a part of the longitudinal direction of the slit, a hole forming step of forming an adhesive supply hole in a mounting base of the injection molding part, the adhesive supply hole communicating with an adhesive supply area between the first opposing surface and the second opposing surface; and a supplying step of supplying adhesive to the adhesive supply area through the adhesive supply hole. (7) In at least the adhesive supply area, one of the first opposing surface and the second opposing surface has a convex stripe shape, and the other is formed into a concave stripe shape capable of receiving the convex stripe shape of the other surface, The manufacturing method of a door weatherstrip described in (6), wherein when the first opposing surface and the second opposing surface are butted against each other, the mounting surface side edge portion and the sealing portion side edge portion abut, and the middle portion is separated to form an adhesive flow path along the slit. (8) The method for manufacturing a door weather strip according to (7), further comprising a contacting step of butting the first opposing surface against the second opposing surface between the hole forming step and the supplying step. Effect of the Invention

[0007] According to the measures (1) to (6), an adhesive injection hole that communicates with the adhesive injection space is formed, and adhesive can be supplied to the appropriate position by simply supplying an appropriate amount of adhesive from the adhesive injection hole, thereby making it possible to avoid accidentally supplying adhesive to peripheral areas outside the slit or poor adhesion due to insufficient adhesive.

[0008] According to the measure (2), the opening width of a part of the slit is enlarged to form an adhesive injection port adjacent to the slit, so that the adhesive can be efficiently introduced into the adhesive injection space.

[0009] According to the means (3) to (7), the attachment surface side edge and the seal portion side edge of the first opposing surface and the second opposing surface abut against each other, and an adhesive flow path is formed in the middle portion. That is, a substantially sealed fine flow path is formed in the adhesive injection space. As a result, the adhesive injected from the adhesive injection port flows into the adhesive flow path mainly by capillary action, so that the adhesive can be efficiently distributed throughout the entire bonding area without requiring a large injection pressure. On the other hand, since the capillary action does not occur in the area where the adhesive flow path is not formed by the uneven stripes, it is possible to prevent the adhesive from accidentally flowing outside the bonding area without the need to take the trouble of forming a blocking wall or the like. Furthermore, since the attachment surface side edge and the seal portion side edge of the first opposing surface and the second opposing surface abut against each other, it is also possible to prevent the adhesive from leaking out of the adhesive flow path from the attachment surface side or the seal portion side to the outside.

[0010] According to the measure (4), since the adhesive injection hole does not reach the side edge of the seal portion, it is possible to prevent the adhesive injected from the adhesive injection hole from leaking out toward the seal portion.

[0011] According to the measure (5), the first opposing surface and the second opposing surface can be easily positioned at the non-linear portion of the slit, so that the joining can be performed without misalignment around the slit.

[0012] According to the measure (8), the adhesive can be supplied to the adhesive supply area while the first opposing surface and the second opposing surface are positioned. [Brief description of the drawings]

[0013] [Figure 1] FIG. [Diagram 2] FIG. 4 is an enlarged perspective view of a main portion of the door weather strip before joining. [Diagram 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Diagram 5] FIG. 4 is an enlarged perspective view of a main portion of the door weather strip in a joined state. [Figure 6] 6 is a cross-sectional view taken along line VI-VI in FIG. 5. [Figure 7] 7 is a cross-sectional view taken along line VII-VII in FIG. 5. [Figure 8] FIG. 4 is an enlarged perspective view of the vicinity of a second opposing surface of the adhesive supply area. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The present invention will be described in detail below by taking a representative embodiment as an example. As shown in FIG. 1, a door weather strip (hereinafter simply referred to as a weather strip) 1 of this embodiment is a long member arranged on the peripheral portion of a vehicle door 2 (hereinafter simply referred to as a door) of an automobile or the like, and is formed into a ring shape as a whole by connecting a plurality of injection molded portions 10 and extrusion molded portions 20. The injection molded portion 10 is an injection molded product and is arranged on the peripheral corner portion of the door 2. The extrusion molded portion 20 is an extrusion molded product and is basically arranged on the linear portion of the peripheral portion of the door 2. However, in this embodiment, one extrusion molded portion 20 is arranged from the lower half of the door 2 to the entire vertical edge portion on the rear side of the vehicle. Reference numeral 3 denotes a door panel, and reference numeral 4 denotes a side window. cormorant It is.

[0015] 1 shows the right front door as seen from inside the vehicle (phantom lines), but the weather strip 1 can also be arranged on the left front door, the left and right rear doors, the back door, etc. Also, the lower corner of the door 2 can be the injection molded part 10, and the part of the injection molded part 10 shown in FIG. 1 can be the extrusion molded part 20 if it is a part with a relatively large curvature.

[0016] The material for molding the weatherstrip 1 can be an injection- or extrusion-moldable material, specifically, a thermoplastic elastomer, soft synthetic resin such as polyvinyl chloride, elastic material made of rubber such as EPDM, or a foam of these materials. The injection-molded portion 10 and the extrusion-molded portion 20 are preferably made of the same material (for example, both EPDM), but may be made of different materials.

[0017] When manufacturing the weatherstrip 1, the end of the extrusion molded portion 20, which has been molded in advance, is set in the cavity of an injection mold so that it faces the cavity, and molten material is injected into the cavity to injection mold the injection molded portion 10, while joining and connecting the end of the injection molded portion 10 to the end of the extrusion molded portion 20. At this time, a core for forming the hollow seal portion 12 of the injection molded portion 10 is disposed in the cavity of the injection mold.

[0018] The weatherstrip 1 has a substantially uniform shape over its entire length, and integrally includes a mounting base and a hollow seal portion. That is, as shown in FIG. 2, the injection molded portion 10 integrally includes a mounting base 11 and a hollow seal portion 12, and the extrusion molded portion 20 also integrally includes a mounting base 21 and a hollow seal portion 22. As shown in FIGS. 3 to 6, the mounting bases 11 and 21 are flat plates, and are portions that are attached and fixed to the door panel 3 of the door 2. Therefore, protruding legs 13 and 23 that come into contact with the door panel 3 are formed over the entire length on the outer and inner edges of the mounting surface sides of the mounting bases 11 and 21. The hollow seal portions 12 and 22 are pressed against the vehicle body 5 when the door 2 is closed, and seal the inside and outside of the vehicle. Lip portions 14 and 24 are integrally formed on the outer sides of the hollow seal portions 12 and 22. When the door 2 is closed, the tips of the lips 14 and 24 also come into elastic contact with the vehicle body 5.

[0019] In addition, as a difference in shape between the injection molded part 10 and the extrusion molded part 20, a slit 15 for removing the core is formed in the mounting base 11 of the injection molded part 10. The slit 15 has a longitudinal dimension that allows the core to be removed after injection molding, and after the core is removed, a first opposing surface 15l and a second opposing surface 15r that face each other across the slit 15 are joined by adhesion in at least a portion of the longitudinal direction. Meanwhile, a plurality of through holes are provided in the mounting base 21 of the extrusion molded part 20 at a position outside the figure, and the weather strip 1 is fixed to the door panel 3 by inserting clips (not shown) into the through holes.

[0020] 2, the slit 15 is formed linearly in the widthwise center of the mounting base 11, but has a non-linear portion in the longitudinal center. In this embodiment, the non-linear portion is bent in the widthwise direction (inside / outside direction of the vehicle) to form a dogleg shape. In this embodiment, the bent portion is used as the joining region, i.e., the adhesive supply region S.

[0021] As shown in FIG. 3, in the adhesive supply area S, the first opposing surface 15l has a convex shape, and the second opposing surface 15r has a concave shape capable of receiving the convex shape of the first opposing surface 15l. Note that "convex" or "concave" means that the convex or concave shape is continuously formed in the longitudinal direction (along the slit 15). The protrusion amount of the first opposing surface 15l is smaller than the recession amount of the second opposing surface 15r. In contrast, in areas other than the adhesive supply area S, both the first opposing surface 15l and the second opposing surface 15r are flat, as shown in FIG. 4. The opening width t1 of the slit 15 in the adhesive supply area S is smaller than the opening width t2 of the slit 15 in areas other than the adhesive supply area S (t1 <t2)

[0022] When bonding with adhesive, the first opposing surface 15l and the second opposing surface 15r are butted against each other in the adhesive supply area S, as shown in Fig. 5. Then, as shown in Fig. 6, the first opposing surface 15l of the convex strip fits into the second opposing surface 15r of the concave strip, and the first opposing surface 15l and the second opposing surface 15r are positioned in the vertical direction, and the mounting surface side edges 15ld and 15rd and the seal portion side edges 15lu and 15ru come into contact with each other. Meanwhile, in the vertical middle part of the mounting base 11, the first opposing surface 15l and the second opposing surface 15r are spaced apart. This space is formed along the slit 15 as the adhesive flow path w.

[0023] 2 and 5, an adhesive supply hole 16 that communicates with the adhesive flow path w of the adhesive supply area S is formed in the mounting base 11 of the injection molded part 10. In this embodiment, as shown in Figs. 7 and 8, the adhesive supply hole 16 is formed by recessing a part of the second opposing surface 15r in the width direction in the opposite direction to the slit 15 (toward the vehicle interior). Also, as shown in Fig. 7, the adhesive supply hole 16 is formed from the mounting surface side edge 15rd to the adhesive flow path w, but does not reach the seal portion side edge 15ru.

[0024] Next, the procedure (manufacturing method) from the manufacture of the weather strip 1 to the joining of the slit 15 will be described. First, as described above, the extrusion molded portion 20 is molded in advance, and the end of the extrusion molded portion 20 is set so as to face the cavity of the injection mold for molding the injection molded portion 10, and a core for forming the hollow seal portion 12 is placed in the cavity. In this state, by injecting molten material into the cavity, the injection molded portion 10 including the hollow seal portion 12 is injection molded as shown in FIG. 2, and the end of the injection molded portion 10 and the end of the extrusion molded portion 20 are joined and connected. In addition, the core is provided with a forming surface for forming the slit 15 and the adhesive supply hole 16, and the slit 15 and the adhesive supply hole 16 are also formed at the same time as the injection molding (hole forming process). Then, when the injection molded portion 10 is sufficiently hardened, the core is pulled out from the slit 15 formed in the mounting base 11.

[0025] Next, as shown in FIGS. 5 and 6, in the adhesive supply area S for joining the slit 15, the first opposing surface 15l and the second opposing surface 15r are abutted against each other to form an adhesive flow path w (abutting step). The abutment of the first opposing surface 15l and the second opposing surface 15r may be performed by the operator's hand or by using a clamping jig or the like. At this time, since the opening width t1 of the slit 15 in the adhesive supply area S is smaller than the opening width t2 of the slit 15 in the area other than the adhesive supply area S (t1 < t2), the abutting operation can be performed more easily than in other areas. Further, in the adhesive supply area S, the slit 15 is formed in a non-linear U-shape, the first opposing surface 15l is formed in a convex strip shape, and the second opposing surface 15r is formed in a concave strip shape. By fitting these concavities and convexities, the first opposing surface 15l and the second opposing surface 15r can be easily positioned in the longitudinal direction and the vertical direction.

[0026] Note that in the present invention, a part of the slit 15 is made non-linear not for forming the clip insertion hole, but solely for enabling the positioning and abutment of the first opposing surface 15l and the second opposing surface 15r.

[0027] Next, an adhesive is supplied from the adhesive supply hole 16 (supply step). The supply of the adhesive may be performed using a dispenser or the like, or manually. At this time, as shown in FIG. 7, since the adhesive supply hole 16 does not reach the side edge 15ru of the seal portion among the abutting portions of the first opposing surface 15l and the second opposing surface 15r, the adhesive supplied from the adhesive supply hole 16 does not leak to the seal portion side. Then, as shown in FIG. 8, the adhesive G mainly penetrates along the adhesive flow path w in the back and longitudinal directions by capillary action. In the area other than the adhesive supply area S, as shown in FIG. 4, the first opposing surface 15l and the second opposing surface 15r are not abutted, and since the opening width t2 of the slit 15 is large and capillary action does not occur, the adhesive G hardly flows out to the area other than the adhesive supply area S even without particularly providing a weir wall or the like. Further, the adhesive G spreads into the flow path w also by gravity, the crimping between the first opposing surface 15l and the second opposing surface 15r, etc. However, if the amount of the adhesive G is appropriate, it is difficult for the adhesive G to flow out to the area other than the adhesive supply area S.

[0028] The actual bonding range by the adhesive G may be the entire adhesive supply area S or a part of the adhesive supply area S. The bonding range by the adhesive G depends on the amount of adhesive G supplied. That is, a sufficient amount of adhesive G may be supplied to spread the adhesive G over the entire adhesive supply area S, or a relatively small amount may be supplied to spread the adhesive G to the vicinity of the adhesive supply hole 16, which is the range where bonding is required at a minimum. The adhesive is preferably one with a relatively low kinetic viscosity so that it can penetrate deep into the area by capillary action. An instant adhesive is also preferable, but other adhesives may be used.

[0029] Although the representative embodiment of the present invention has been described above, it is not limited thereto, and various modifications are possible within the scope of the present invention. For example, the adhesive supply hole 16 may be formed by recessing a part of the first opposing surface 15l, or by recessing a part of both the first opposing surface 15l and the second opposing surface 15r. Alternatively, the adhesive supply hole 16 may be provided not only adjacent to the slit 15 by recessing a part of the first opposing surface 15l or the second opposing surface 15r, but also at a position slightly away from the slit 15. In this case, a communication passage that communicates the adhesive supply hole 16 with the adhesive flow path w is provided inside the mounting base 11.

[0030] Basically, the adhesive supply hole 16 needs to be provided in one place, but it may be provided in multiple places. Also, the adhesive supply hole 16 may be provided at an end of the adhesive supply area S in the longitudinal direction, or may be provided in the center.

[0031] Conversely to the above embodiment, the first opposing surface 15l may be a concave stripe, and the second opposing surface 15r may be a convex stripe. The first opposing surface 15l and the second opposing surface 15r may also be a convex and concave stripe shape in areas other than the adhesive supply area S. The shapes of the first opposing surface 15l and the second opposing surface 15r are not particularly limited as long as one of them is a concave stripe that can receive the other's convex stripe. For example, in addition to a semicircle as in the above embodiment, they may also be triangular or rectangular. Also, the first opposing surface 15l and the second opposing surface 15r do not necessarily have to be similar in shape. For example, the first opposing surface 15l may be a triangular convex stripe, and the second opposing surface 15r may be a rectangular concave stripe, and various patterns of shape combinations may be adopted.

[0032] The non-linear portion of the slit 15 that serves as the adhesive supply area S may be bent not only in a dogleg shape but also in various other patterns such as a semicircular, triangular, rectangular, stepped, etc. Also, it is not essential to provide the non-linear portion.

[0033] In the hole forming step, it is preferable to form the adhesive supply holes 16 simultaneously with the injection molding, but they may be drilled after the injection molding. [Explanation of symbols]

[0034] 1 Door Weather Strip 2 Car Door 3 Door Panel 4 Side Windows 10 Injection molding section 11·21 Mounting base 12·22 Hollow seal part 13·23 Legs 14·24 Lip 15 Slit 15l 1st opposing surface 15r Second opposing surface 16 Adhesive supply hole G. Adhesive S Adhesive Supply Area w Adhesive channel

Claims

1. A door weather strip comprising an extrusion molding portion and an injection molding portion connected together, a mounting base portion attached to a peripheral portion of a vehicle door, and a hollow seal portion pressed against a vehicle body when the vehicle door is closed to seal the interior and exterior of the vehicle, the mounting base portion of the injection molding portion having a slit for removing a core for molding the hollow seal portion during injection molding, and a first opposing surface and a second opposing surface opposed to each other across the slit are joined by adhesion at least in a portion of the longitudinal direction of the slit, A door weather strip, wherein an adhesive supply hole is formed in a mounting base of the injection molding portion, the adhesive supply hole communicating with an adhesive supply area between the first opposing surface and the second opposing surface.

2. 2. The door weather strip according to claim 1, wherein the adhesive supply hole is formed by recessing a part of one or both of the first opposing surface and the second opposing surface in a direction opposite to the slit.

3. At least in the adhesive supply area, one of the first opposing surface and the second opposing surface has a convex stripe shape, and the other is formed into a concave stripe shape capable of receiving the convex stripe shape of the other surface, 3. The door weather strip according to claim 1, wherein when the first opposing surface and the second opposing surface are joined with each other by an adhesive, the mounting surface side edge and the sealing portion side edge of the first opposing surface and the second opposing surface abut against each other, and an adhesive flow path is formed along the slit in the middle portion, separating the first opposing surface and the second opposing surface.

4. 4. The door weather strip according to claim 3, wherein the adhesive supply hole is formed from the mounting surface side edge portion to the adhesive flow path, but does not reach the seal portion side edge portion.

5. The door weather strip according to claim 1 or 2, wherein the slit has a non-linear portion.

6. A method for manufacturing a door weatherstrip, comprising: an attachment base portion formed by connecting an extrusion molding portion and an injection molding portion, the attachment base portion being attached to a peripheral portion of a vehicle door; and a hollow seal portion being pressed against a vehicle body when the vehicle door is closed to seal the interior and exterior of the vehicle, the attachment base portion of the injection molding portion having a slit for removing a core for molding the hollow seal portion during injection molding, and a first opposing surface and a second opposing surface opposed to each other across the slit being joined by adhesion at least in a portion of the longitudinal direction of the slit, a hole forming step of forming an adhesive supply hole in a mounting base of the injection molding part, the adhesive supply hole communicating with an adhesive supply area between the first opposing surface and the second opposing surface; and a supplying step of supplying adhesive to the adhesive supply area through the adhesive supply hole.

7. At least in the adhesive supply area, one of the first opposing surface and the second opposing surface has a convex stripe shape, and the other is formed into a concave stripe shape capable of receiving the convex stripe shape of the one of the first opposing surface and the second opposing surface, 7. The method for manufacturing a door weatherstrip according to claim 6, wherein when the first opposing surface and the second opposing surface are butted together, the mounting surface side edge portion and the sealing portion side edge portion abut, and the middle portion is separated to form an adhesive flow path along the slit.

8. The method for manufacturing a door weather strip according to claim 7, further comprising a contacting step of butting the first opposed surface against the second opposed surface between the hole forming step and the supplying step.

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