JPH03277513A - Structure of clip mounting hole of weather strip - Google Patents

Abstract

PURPOSE:To prevent the generation of rust on the end surface of an opening part by setting a core material within upper and lower molds and allowing molten rubber to flow in the molds to fill the clearance demarcated between the clip mounting hole opened to the core material and the projections of the molds with rubber. CONSTITUTION:A core material 13 is arranged between an upper mold 21 and a lower mold 23 to confront the projection 21a of the upper mold 21 with the projection 23a of the lower mold 23 and the projections 21b, 21b of the upper mold 21 are fitted in the recessed parts 13b, 13b of the core material 13 and the peripheral part of a clip mounting hole 13a is supported by the support pins 23b, 23b of the lower mold 23. A clearance alpha2 is filled with the rubber flowing in from a gate from a space part alpha1 and, in a weather strip 1, the surface and rear of the core material 13 are coated with rubber layers 25 and the thin rubber layer 25a integrated with the rubber layers 25 is also bonded and formed to the end surface of the opening part of the clip mounting hole 13a. No thin rubber layer is bonded to the recessed parts 13b, 13b but, since rusting preventing treatment is applied to the surface of the core material 13, there is no problem.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a clip mounting hole structure for a weather strip that is mounted around the door of an automobile.

2. Description of the Related Art Generally, a weather strip made of rubber material is attached to the edge of the vehicle body opening where the vehicle door is attached to prevent wind, rain, dust, etc. from entering from outside the vehicle. An example of the terminal molded portion of the weather strip 1 is shown. In the figure, 3 is a base part fitted to a glue retainer (not shown), 5 is a hollow ring lip, and the base part 3 is
A wide mounting base 7 is provided at the end portion along the extension line of the hollow seal lip 5 for fixing one end of the weatherstrip I to a vehicle body side member (not shown).

This mounting base 7 has a plurality of mounting holes 9.9 and 9.
... are opened, and similar mounting holes are also opened on the side of the vehicle body side member (not shown), and the mounting holes 9, 9 ... are opened.
- The weather strip 1 is attached to the vehicle body side member by inserting the mounting clip 11 inside.

Usually, a core material 13 made of metal or the like is buried in the mounting base 7 to maintain rigidity during installation, and the mounting holes 9, 9, . . . are opened through this core material 13. There is. Generally, the core material 13 is plated to prevent rust, but when forming the mounting holes 9, 9, etc. by punching or other means, the opening end surface of the core material 13 is exposed. As a result, the end face of the opening becomes accustomed to rusting during long-term use.

In order to deal with the above problem, Japanese Patent Application Laid-open No. 149114/1983 discloses a positioning pusher made of rubber or synthetic resin, 15, on the end face of the opening of the core material 13, as shown in FIGS. 10 to 12. , 15 or the bushing 17 in which the clip insertion hole 17a is formed in advance is fitted and fixed, and then the core material 13 is set in upper and lower molds (not shown) and molded, thereby forming the opening end surface of the core material 13. A structure is disclosed that prevents rust from forming.

Problems to be Solved by the Invention However, in the clip mounting hole structure of such a conventional weatherstrip, especially the structure described in Japanese Patent Application Laid-Open No. 63-1/19114, the bushing 15.
In addition to having to prepare 17 as a separate component,
When molding the weather strip 1, these punches 15.
17 must be fitted and fixed to the end surface of the opening of the clip attachment hole formed in the core material 13, which poses the problem of requiring extra man-hours before molding and incurring costs such as parts costs. Ta.

Therefore, the present invention solves the problems of the conventional clip mounting hole structure of weather strips, prevents rust on the end face of the opening with a simple structure, and saves unnecessary parts and man-hours. It is an object of the present invention to provide a clip mounting hole structure that is unnecessary and can reduce costs.

Means for Solving the Problems In order to achieve the above object, the present invention provides a clip mounting hole structure opened at appropriate positions of a weather strip whose front and back surfaces of a core material are covered with a rubber layer. Four parts are formed on the core material located near the hole to correspond to the positioning protrusions protruding from either the upper mold or the lower mold for weatherstrip molding, as well as four parts corresponding to the above-mentioned clip mounting holes. By protruding a protrusion that forms a predetermined clearance between the upper mold or the lower mold and the end surface of the opening of the clip mounting hole, the end surface of the opening of the clip mounting hole is integrated with the rubber layer. A thin layer of molded rubber is attached to the weatherstrip's clip mounting hole structure.

According to this structure, when the core material is set inside the upper mold and the lower mold and molten rubber flows into the space formed around the core material, the inflowed rubber opens in the core material. Since the space between the clip mounting hole and the protrusion on the upper or lower mold is filled,
In the obtained weatherstrip, the front and back sides of the core material are covered with a rubber layer, and a thin layer of rubber integral with the rubber layer is also adhered to the opening end of the clip attachment hole of the weatherstrip. be done.

Therefore, in the obtained weatherstrip, the processed surface when the core material is subjected to a punching process such as pressing is not exposed to the outside air, so that rusting phenomenon caused by such exposure can be prevented.

EXAMPLES Below, various embodiments of the weatherstrip clip attachment hole structure according to the present invention will be described in detail, with the same reference numerals attached to the same components as in the conventional structure.

1 to 3 show a first embodiment of the present invention.
Reference numeral 3 denotes a core material made of metal or the like, and the surface of this core material 13 has been subjected to rust prevention treatment such as plating in advance, and clip attachment holes 13a are formed at appropriate positions by punching processing means such as a press. is opened. Furthermore, this clip mounting hole 13
Positioning recesses 13b, 13b are formed in the vicinity of point a in the left and right direction in the drawing. This core material 1
3 is for maintaining the rigidity of the rubber layers located on the front and back sides, as will be described later, and is embedded in the rubber layer constituting the weather strip.

The above-mentioned recesses 13b, ], 3b are not limited to the two locations shown in the figure, but may be provided at three locations in the vicinity of the mounting hole +38 as shown in FIG.
As shown in the figure, it may be formed as a concentric groove 13C centered around the attachment hole 13a.

Reference numeral 21 denotes an upper mold, and a projection 21a that can be inserted into the mounting hole 13a is provided in the center of the upper mold 21 to protrude downward. Positioning protrusions 21b, 21b are provided to protrude in the left-right direction. That is, these protrusions 21b, 21b are connected to the core material 1.
It is set to be located at a position corresponding to the positioning recesses 13b, 13b formed in 3.

23 is a lower mold, and a projection 23a that can be inserted into the mounting hole 13a of the core material 13 is provided in the center of the lower mold 23 to protrude upward. Furthermore, in the vicinity of the protrusion 23a, support bins 23b, 23b for supporting the periphery of the grip attachment hole 13a of the core member 3 from below are provided to protrude upward.

FIG. 2 shows that during molding of the weather strip, the core material 13 is placed between the upper mold 21 and the lower mold 23, and the protrusion 21a of the upper mold 21 and the protrusion 23a of the lower mold 23 are butted together. A positioning protrusion 21b protruding from the upper mold 21 within the positioning recesses 13b formed in the core material 13.

21b is fitted, and the clip attachment hole 13 of the core material 13
Support bins 23b, 2 whose peripheral parts a protrude from the lower die 23
3b.

In the state shown in FIG. 2, a sealed space α1 of a predetermined shape is formed around the core material 13, and
The clip attachment hole 13a opened in the core material 13 and the protrusion 2
There is also a predetermined clearance α between 1a and the protrusion 23a,
are separated.

From this state, when molten rubber is flowed into the space α1 from a gate (not shown) and molded, the comb that has flowed into the space α1 is
1 to clearance α. Therefore, as shown in FIG. 3, the weatherstrip thus obtained has the front and back sides of the core material 13 covered with a rubber layer 25, and the end surface of the opening of the weatherstrip 1 glue 1 rusob attachment hole f3a. A thin layer 25a of rubber integral with the rubber layer 25 is also adhered and formed. Note that the positioning recesses 13b and Iab formed in the core material 13 are
Since it corresponds to the protrusions 21b and 21b, a thin layer of rubber is not adhered to the inside of the recesses 1.3b and 13b after molding, but the surface of the core material 13 has been coated with plating etc. to prevent rust. Since the treatment has been applied, there is no problem even if the recesses 13b, 13b are exposed.

Therefore, since the thin rubber layer 25a is adhered to the entire opening end face of the mounting hole 13a in the weather strip knob l glue 1 knob mounting hole +38 obtained, the core material 13
A major feature is that the machined surface is not exposed to the outside air when the mounting hole 13a is opened by punching, such as pressing. Therefore, it is possible to prevent rusting caused by the core material 13 being exposed to the outside air at the end face of the opening.

In the above embodiment, the upper die 21 is provided with a positioning protrusion 21.
Although the protrusions 21a and 21b are provided protrudingly, such protrusions 21a,
21b may be provided on the lower die 23 side. In that case, it is necessary to form four parts on the core material 13 corresponding to the protrusions provided on the lower die 23.

If necessary, the core +41 located near the clip mounting hole 13a
3, a recess may be formed to correspond to a positioning protrusion formed on either the upper mold 21 or the lower mold 23 for weatherstrip molding.

FIG. 6 shows a second embodiment of the present invention, in which the core material 13 is press-molded to form a substantially conical cylindrical portion 13e having a tapered surface 13d, and A protrusion 21e that can be fitted into the cylindrical portion 13e is provided on the upper mold 21 and protrudes downward, and a protrusion that has a tapered surface 23d that comes into contact with the tapered surface 13d of the core material 13 is provided on the lower mold 23. 23e
It is installed so that it protrudes upward. Therefore, the cylindrical portion +38 of the core material 13 is the positioning recess 13 in the first embodiment.
It corresponds to b. Moreover, the protrusion 21e of the upper mold 21 and the core material 1
Similar to the above example, a clearance α is formed between the opening end face of No. 3 and the opening end face of No. 3.

According to the second embodiment, the core material 13 of the weather strip is formed based on the effect of the clearance α.
Since the end face of the opening is covered with the thin rubber layer 25a, the effect that the end face of the opening is not exposed can be obtained.

FIG. 7 shows a third embodiment of the present invention. In this embodiment, the core material 13 is press-molded to form a stepped portion 13f2 and a stepped portion 13g. A protrusion 21e that can be fitted inside is provided to protrude downward, and a protrusion 23f having a shape that can be fitted to the step 13f of the core material 13 is provided on the lower mold 23 to protrude upward. It is. Therefore, the step portions 13f and 13g of the core material 13 correspond to the positioning recess 13b in the first embodiment. Further, a clearance α is formed between the protrusion 21e of the upper die 21 and the opening end face of the core material 13, as in the previous example.

According to the third embodiment, the core material 13 of the weather strip is also formed based on the effect of the clearance α.
Since the end face of the opening is covered with the thin rubber layer 25a, the effect that the end face of the opening is not exposed can be obtained.

FIG. 8 shows a fourth embodiment of the present invention, in which a folded piece 13h is formed by bending the opening end face of the core material 13 by approximately 180° by press molding.
In addition, a positioning recess 13b is formed in the core material 13 as in the first embodiment.

A positioning protrusion 21 protruding from the upper mold 21 in the inside 13b
b, 21b are fitted, and the protrusion 21 protrudes from the upper die 21.
e is butted against a protrusion 23a protruding from the lower die 23 near the folded piece 13h. Furthermore, the core material 13 is supported by support pins 23b, 23b protruding from the lower die 23.

Also, there is a clearance α between the folded portion of the core material 13 and the protrusion 21e of the upper mold 21, as in the above example.

is formed.

According to the fourth embodiment, based on the effect of the clearance α, the folded portion of the core material 13 forms the thin rubber layer 25a.
Since the tip of the folded piece 13h is located within the rubber layer 25, the opening end surface of the core material 13 is not exposed to the outside air.

Effects of the Invention As explained in detail above, according to the clip mounting hole structure of the weatherstrip according to the present invention, either the upper mold or the lower mold for molding the weatherstrip is attached to the core material located near the clip mounting hole. A recess corresponding to the positioning protrusion protruding from one side is formed, and a predetermined clearance is provided between the upper mold or the lower mold corresponding to the clip mounting hole and the opening end surface of the mounting hole. By providing the spaced protrusions in a protruding manner, a weather strip clip mounting hole structure is created in which a thin layer of rubber integrally molded with the rubber layer is adhered to the opening end surface of the clip mounting hole. The effects described below are brought about.

That is, when the core material is set inside the upper mold and the lower mold, and the molten rubber flows into the space formed around the core material,
The rubber that has flowed in is filled into the clearance formed between the clip attachment hole opened in the core material and the protrusion provided on the upper mold or the lower mold, so that the resulting weather
In the strip, the front and back sides of the core material are covered with a rubber layer, and a thin layer of rubber integral with the rubber layer can also be adhered to the end face of the opening of the clip attachment hole of the weatherstrip. Therefore, the processed surface of the core material of the obtained weatherstrip is not exposed to the outside air when it is subjected to punching processing such as pressing, so even during long-term use, there is no risk of damage caused by such exposure. Rust phenomenon can be prevented.

Therefore, according to the present invention, it is possible to prevent rusting on the end face of the opening with a simple configuration, and there is no need to prepare a bushing or the like as a separate member in the conventional example.
This has the effect of reducing costs by eliminating the need for extra parts and man-hours.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is an exploded cross-sectional view of a main part showing an example of manufacturing the clip mounting hole structure of a weather strip according to the present invention, Fig. 2 is a cross-sectional view showing the assembled state, and Fig. 3 is a cross-sectional view showing the assembled state. 4 and 5 are partial plan views of the core material 13, and FIG. 6 is a sectional view of the main part showing a second embodiment of the invention. 7 is a sectional view of a main part showing a third embodiment of the present invention, FIG. 8 is a sectional view of a main part showing a fourth embodiment of the invention, and FIG. 9 is a terminal part of a normal weather strip. FIG. 10 is a partial perspective view showing the shape of the weather strip, FIG.
FIG. 12 is a sectional view showing an example of the shape of a conventionally used bushing. 1... Weather strip, 13... Core material, 13a
...Clip mounting hole, 13b...recess, 13d...
Teba, +38...cylindrical part, 13f, 13g...
Step hole, 13h...folding piece, 21-upper mold, 21a,
21b, 21e--protrusion, 23--lower mold, 23a,
23e, 23f--Protrusion, 2'3 b...Support pin, 23d...Taber, 25...Rubber Ji, 25
a... Thin layer (of rubber), Fig. 1 Fig. 2 Fig. 5 Fig. 3a Fig. 6 Fig. 7 Fig. 8 Fig. 3a

Claims (1)

[Claims] (1) In a clip mounting hole structure in which the front and back surfaces of the core material are covered with a rubber layer and are opened at appropriate positions in the weatherstrip, the upper mold for forming the weatherstrip or A recess corresponding to a positioning protrusion protruding from one of the lower molds is formed, and a recess is formed in the upper mold or the lower mold corresponding to the clip mounting hole between the opening end surface of the mounting hole. A weather strip characterized in that a thin layer of rubber molded integrally with the rubber layer is adhered to the end surface of the opening of the clip attachment hole by providing a protrusion that separates a predetermined clearance. Clip mounting hole structure.