JPH0677933B2 - Weather strip clip mounting hole structure - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clip mounting hole structure for a weather strip mounted around a door of an automobile.

2. Description of the Related Art Generally, a weather strip made of a rubber material is attached to an opening edge of a vehicle body to which an automobile door is attached so as to prevent wind, rain and dust from entering from the outside of the vehicle. An example of the terminal molding portion of the weather strip 1 is shown. Reference numeral 3 in the drawing denotes a base portion which is fitted to a retainer (not shown), and 5 denotes a hollow seal lip. A wide mounting base 7 for fixing one end of the weather strip 1 is provided.

A plurality of mounting holes 9, 9 ... Are opened at predetermined positions of the mounting base 7, and similar mounting holes are also formed on the vehicle body side member side (not shown). The weather strip 1 is attached to the vehicle body side member by inserting the mounting clip 11 into the interior of the member.

Usually, a core material 13 made of metal or the like is embedded in the mounting base 7 in order to maintain rigidity during mounting, and the mounting holes 9, 9 ... Are opened through the core material 13. Generally core material 13
Has been plated to prevent rusting, but when the mounting holes 9, 9 ... Are opened by punching or other means, the opening end surface of the core material 13 is exposed and The end face of the opening may be rusted during use.

In order to deal with the above, Japanese Patent Laid-Open No. 63-149114 discloses that
As shown in FIGS. 0 to 12, after the positioning bushes 15, 15 made of rubber or synthetic resin or the bushing 17 with the clip insertion hole 17a formed in advance on the end surface of the opening of the core material 13 is fitted and fixed. There is disclosed a configuration in which the core material 13 is set in upper and lower molds (not shown) and subjected to molding to prevent rusting of the end surface of the opening of the core material 13.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in such a conventional clip mounting hole structure for a weather strip, particularly the structure disclosed in Japanese Patent Laid-Open No. 63-149114, bushes 15 and 17 are prepared as separate members in advance. Besides, the bushes 15 and 17 must be fitted and fixed to the end face of the opening of the clip mounting hole formed in the core 13 when the weather strip 1 is molded. However, there is a problem that the cost such as the parts cost is required in addition to the above.

Therefore, the present invention solves the problem of the conventional clip mounting hole structure of the weather strip, prevents rusting of the end face of the opening with a simple structure, and does not require extra parts and man-hours. It is an object of the present invention to provide a clip mounting hole structure that can reduce the cost.

Means for Solving the Problems In order to achieve the above object, the present invention provides a clip mounting hole structure in which a weather strip in which a front surface and a back surface of a core material are covered with a rubber layer is opened at an appropriate position. An upper mold corresponding to the above clip mounting hole is formed in a core member located in the vicinity thereof with a concave portion corresponding to a positioning protrusion protruding from either the upper mold or the lower mold for weather strip molding. Alternatively, the lower mold is formed with a protrusion that forms a predetermined clearance between the opening of the mounting hole and the end surface of the mounting hole, so that the end of the opening of the clip mounting hole is integrally formed with the rubber layer. It has a clip mounting hole structure for a weather strip with a thin rubber layer attached.

With such a configuration, 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 inflow rubber is opened in the core material. Since it is filled up to the inside of the clearance that is separated between the clip mounting hole and the projection that is provided on the upper mold or the lower mold,
In the obtained weather strip, the front surface and the back surface side of the core material are covered with a rubber layer, and a thin rubber layer integral with the above rubber layer is adhered to the end surface of the opening of the clip mounting hole of the weather strip. .

Therefore, since the processed surface of the obtained weather strip when the core material is punched by a press or the like is not exposed to the outside air, it is possible to prevent the rust phenomenon caused by such exposure.

Examples Hereinafter, various examples of the clip mounting hole structure of the weather strip according to the present invention will be described in detail by assigning the same reference numerals to the same components as those of the conventional configuration.

1 to 3 show the first embodiment of the present invention, in which 13
Is a core material made of metal or the like, and the surface of the core material 13 has been subjected to rust prevention treatment such as plating in advance, and clip mounting holes 13a are formed at appropriate positions by punching processing means such as a press.
Is opened. Further, a positioning recess is provided in the vicinity of the clip mounting hole 13a in the left-right direction in the drawing.
13b and 13b are formed. The core material 13 is for retaining the rigidity of the rubber layers located on the front surface and the back surface side as described later, and is embedded in the rubber layers forming the weather strip.

The recesses 13b, 13b are not limited to the two positions shown in the figure, but may be set at three positions in the vicinity of the mounting hole 13a as shown in FIG. 4, and as shown in FIG. As shown, it may be formed as a concentric groove 13c centered on the mounting hole 13a.

Reference numeral 21 denotes an upper die, and a protrusion 21a that can be inserted into the mounting hole 13a is provided so as to protrude downward at the center of the upper die 21, and the protrusion 21a is centered in the drawing. Positioning projections 21b, 21b are provided in the left-right direction of the. That is, the protrusions 21b, 21b are set so as to be positioned corresponding to the positioning recesses 13b, 13b formed in the core material 13.

23 is a lower mold, and the core material is provided at the center of the lower mold 23.
A projecting portion 23a that can be inserted into the mounting hole 13a of 13 is provided so as to project upward. Further, support pins 23b, 23b for supporting the peripheral portion of the clip mounting hole 13a of the core 3 from the lower side are provided in the vicinity of the projecting portion 23a so as to project upward.

Fig. 2 shows the upper part of the core 13 when forming the weather strip.
It is arranged between the lower mold 23 and the lower mold 23, and shows a state in which the protrusion 21a of the upper mold 21 and the protrusion 23a of the lower mold 23 are butted.
The upper mold 2 is placed in the positioning recesses 13b, 13b formed in the core material 13.
Positioning projections 21b, 21b projecting from 1 are fitted, and the peripheral portion of the clip mounting hole 13a of the core material 13 is supported by support pins 23b, 23b projecting on the lower mold 23. .

In the state shown in FIG. 2, a sealed space α ₁ having a predetermined shape is formed around the core material 13, and the clip mounting hole 13a opened in the core material 13 and the protrusion 21a are formed. A predetermined clearance α ₂ is also formed between this and the protrusion 23a.

From this state, when molten rubber is injected into the space α ₁ from a gate (not shown) and molded, the inflowed rubber is
_{From 1} to clearance α ₂ . Therefore, as shown in FIG. 3, the weather strip 1 thus obtained has the core material 13 whose front and back surfaces are covered with the rubber layer 25 and has the clip mounting holes 13 of the weather strip 1.
Also on the end face of the opening of a, a thin rubber layer 25a integrated with the above rubber layer 25a
Have been adhered and formed. Since the positioning recesses 13b, 13b formed in the core material 13 correspond to the protrusions 21b, 21b of the upper mold 21, a thin rubber layer is attached to the recesses 13b, 13b after molding. However, since the surface of the core material 13 is previously subjected to rust prevention treatment such as plating, there is no problem even if the recesses 13b and 13b are exposed.

Therefore, the clip mounting hole of the obtained weather strip 1
13a has a thin rubber layer on the entire end face of the opening of the mounting hole 13a.
Since 25a is adhered and formed, the major feature is that the processed surface is not exposed to the outside air when the core material 13 is subjected to punching processing such as pressing to open the mounting hole 13a. Therefore, it is possible to prevent the rusting phenomenon due to the core material 13 being exposed to the outside air at the end surface of the opening.

In the above embodiment, the upper mold 21 is provided with positioning projections 21a, 21
Although b is provided so as to project, such protrusions 21a and 21b may be provided on the lower mold 23 side. In that case, it is necessary to form a recess in the core material 13 corresponding to the projection provided on the lower mold 23.

If necessary, for the core material 13 located near the clip mounting hole 13a,
It is sufficient to form a recess corresponding to the positioning projection formed on either the upper mold 21 or the lower mold 23 for weather strip molding.

FIG. 6 shows a second embodiment of the present invention. In the case of this embodiment, the core material 13 is press-molded to form a substantially conical cylindrical portion 13e having a tapered surface 13d, and The upper mold 21 is provided with a protrusion 21e that can be fitted into the cylindrical portion 13e so as to protrude downward, and the lower mold 23 has a tapered surface 23d that abuts the tapered surface 13d of the core member 13. 23e is projected upward. Therefore, the cylindrical portion 13e of the core material 13 corresponds to the positioning recess 13b in the first embodiment. Further, a clearance α ₂ similar to the above example is formed between the protrusion 21e of the upper die 21 and the end surface of the opening of the core material 13.

According to the second embodiment, since the end surface of the opening of the core material 13 of the weather strip formed by the action of the clearance α ₂ is covered with the thin rubber layer 25a, the end surface of the opening is exposed. There is no effect.

FIG. 7 shows a third embodiment of the present invention. In the case of this embodiment, the core material 13 is press-molded to form the step portions 13f and 13g, and the upper die 21 is provided with the above step portions. A protrusion 21e that can be fitted in 13g is provided to protrude downward, and a protrusion 23f having a shape that can be fitted to the stepped portion 13f of the core 13 is provided to the lower mold 23 so as to be upwardly projected. I am doing it. Therefore, the step portions 13f and 13g of the core material 13 are
This corresponds to the positioning recess 13b in the embodiment.
Further, a clearance α ₂ similar to the above example is formed between the protrusion 21e of the upper die 21 and the end surface of the opening of the core material 13.

Also in the third embodiment, since the opening end surface of the core material 13 of the weather strip formed on the basis of the action of the clearance α ₂ is covered with the thin rubber layer 25a, the opening end surface may be exposed. The effect is obtained.

FIG. 8 shows a fourth embodiment of the present invention. In the case of the present embodiment, the end face of the opening of the core material 13 is formed by press molding so as to be approximately 18
A folding piece 13h bent by 0 ° is formed, and positioning projections provided on the upper die 21 are provided in positioning recesses 13b, 13b formed in the core 13 as in the first embodiment. Part 21
The protrusions 21e protruding from the upper mold 21 are fitted to the protrusions 23a protruding from the lower mold 23 in the vicinity of the folding piece 13h. Further, the core material 13 is supported by the support pins 23b, 23b protruding from the lower mold 23. Further, a clearance α ₂ similar to the above example is formed between the folded-back portion of the core material 13 and the protrusion 21e of the upper die 21.

According to the fourth embodiment, based on the action of the clearance α ₂ , the folded portion of the core material 13 is covered with the thin rubber layer 25a, and the tip of the folded piece 13h is located in the rubber layer 25. Therefore, at least the end surface of the opening of the core material 13 is not exposed to the outside air.

Effects of the Invention As described in detail above, according to the clip mounting hole structure of the weather strip according to the present invention, one of the upper die and the lower die for weather strip molding is provided on the core material located in the vicinity of the clip mounting hole. A concave portion corresponding to the positioning projection formed on the upper side of the mounting hole is formed, and a predetermined clearance is formed between the upper mold or the lower mold corresponding to the clip mounting hole and the end face of the opening of the mounting hole. By providing a protruding portion, a weather strip clip mounting hole structure in which a thin rubber layer integrally formed with the rubber layer is attached and formed on the end surface of the opening portion of the clip mounting hole is described below. The effect is 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,
Since the inflowing rubber is filled up to the clearance separated between the clip mounting hole opened in the core material and the protrusion protruding from the upper mold or the lower mold, the obtained weather strip is The front and back sides of the core material are covered with a rubber layer, and a thin rubber layer integral with the rubber layer can be attached and formed on the end surface of the opening of the clip mounting hole of the weather strip. Therefore, in the obtained core material of the weather strip, since the processed surface when punching by a press or the like is not exposed to the outside air, even if it is used for a long period of time, the generation due to such exposure is caused. The rust phenomenon can be prevented.

Therefore, according to the present invention, it is possible to prevent rusting of the end face of the opening with a simple configuration, and there is no need to prepare a bush or the like in the conventional example as a separate member,
The effect is that cost can be reduced by eliminating unnecessary parts and man-hours.

[Brief description of drawings]

FIG. 1 is an exploded sectional view of an essential part showing a production example of a clip mounting hole structure of a weather strip according to the present invention, FIG. 2 is a sectional view showing a state at the time of assembly, and FIG. 3 is obtained by the present invention. 4 and 5 are partial plan views of the core material 13, FIG. 6 is a sectional view of a main part of the second embodiment of the present invention, and FIG. 7 is a view of the present invention. FIG. 8 is a partial sectional view showing a third embodiment, FIG. 8 is a sectional view showing a fourth embodiment of the present invention, and FIG. 9 is a partial perspective view showing a shape of an end portion of a normal weather strip. FIG. 10 is a cross-sectional view of a main part showing an example of a conventional weather strip with a core material, and FIGS. 11 and 12 are cross-sectional views showing an example of the shape of a bush conventionally used. 1 ... Weather strip, 13 ... Core material, 13a ... Clip mounting hole, 13b ... Recessed portion, 13d ... Tapered surface, 13e ... Cylindrical portion, 13f, 13g ... Step hole, 13h. , 21 …… upper mold, 21a, 21b, 21e …… projection, 23 …… lower mold, 23a, 23e, 23f …… projection, 23b …… supporting pin, 23d …… tapered surface, 25 …… rubber layer , 25a ... (rubber) thin layer,

Claims (1)

[Claims] 1. A clip mounting hole structure in which a front surface and a back surface of a core material are covered with a rubber layer and which is opened at an appropriate position in a weather strip. A concave portion corresponding to a positioning projection provided on either one of the mold or the lower mold is formed, and an upper end or a lower mold corresponding to the clip mounting hole is provided with an end surface of an opening of the mounting hole. A thin layer of rubber integrally formed with the rubber layer is adhered and formed on the end surface of the opening of the clip mounting hole by projecting a protrusion that defines a predetermined clearance therebetween. Strip clip mounting hole structure.