JP2001301040A - Structure of corner part of window molding and method for molding the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure of the corner part of a window molding capable of being applied to window glass of which the corner part is bent three- dimensionally, with good appearance and good mounting properties, and a method for molding the same. SOLUTION: In the corner of the window molding mounted on the window glass of which the corner is bent three-dimensionally, the cut end surfaces 11b, 21b of bonding scheduled ends 11a, 21a of two molding members 11, 21 are inclined toward the inside of the molding members from the design surface sides of the molding members to the rear sides thereof, and mutually bonded under pressure to bond two molding members.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a corner portion of a wind molding and a method of forming the same, and more particularly, to a structure of a corner portion of a wind molding which is mounted on a three-dimensionally bent window glass. It relates to a molding method.

[0002]

2. Description of the Related Art As shown in FIG. 12, a window molding 70 is mounted around a front window glass W, a rear window glass and the like of an automobile M in order to seal a gap between a vehicle body panel P and the window glass W. ing. This molding 70, as shown in FIG.
A plurality of substantially linear molding members 7 extruded from a synthetic resin material such as polyvinyl chloride (PVC) into a predetermined sectional shape.
1 and 81 are joined. The molding member 7
The legs 1 and 81 are provided with legs 73 and 83 on the back side of the decorative portions 72 and 82 on the design side, and further formed with ridges 74 and 84 on the side surfaces of the legs 73 and 83. 74,84
Glass fitting grooves 75, 8 between the
5 are formed. Reference numerals 76 and 86 are metal cores embedded in the legs 73 and 83 to increase the rigidity of the legs 73 and 83, and reference numeral 77 is a protrusion 74 of the legs 73 and 83. Is a sealing lip formed on the opposite side. The side surface of the leg 73 between the sealing lip 77 and the decorative portion 72 is a concave groove for a rain gutter. In the illustrated example, the molding members 71, 81
Has an irregular cross-sectional shape, and the molding member 81 on the right side of the figure does not have a sealing lip and a groove for a rain gutter.

Since such a molding 70 is mounted around a window glass W having a corner portion Wc in series, at least two or more molding members 71, 81 having a substantially straight shape are cut at a predetermined length and a predetermined angle. Then, the corner portions 70C are formed by joining the end portions together, thereby forming a series.

Conventionally, the joining of the molding members 71 and 81 is generally performed by a heat welding method. In this joining method, first, two synthetic resin molding members 7 are used.
The joining end portions 71a and 81a of the molding members 1 and 81 are cut obliquely to the longitudinal direction of the molding member, and then, as shown in FIG.
1 and 81 are respectively held by a pair of metal holding dies 91 and 95 facing each other,
By bringing this closer to the heater H, the ends to be joined 71a and 81a are heated and melted.

[0005] The holding dies 91 and 95 are used as inner dies 92 for holding inner halves on the inner peripheral side (the side abutting on the periphery of the window glass) when moldings having corners are formed by joining molding members. , 96 and outer dies 93, 97 for holding the outer peripheral side (the side in contact with the periphery of the window frame). The molding members 71, 81 are located between the inner dies 92, 96 and the outer dies 93, 97. Holding holes 94 and 98 are formed. The holding holes 94, 98 are formed at a predetermined angle with respect to the opposing surfaces 91a, 95a of the holding dies 91, 95, and the ends of the molding members 71, 81 to be joined to the ends 71a, 81a are slightly formed. The holding dies 91 and 95 can be held in a protruding state.

The molding member 7 is heated by the heating.
When the joining ends 71a and 81a of the molding members 71 and 81 are softened and melted, the pair of holding dies 91 and 95 facing each other are brought close to each other and the joining ends of the molding members 71 and 81 as shown in FIG. Cut surfaces (end surfaces) 71b of the portions 71a, 81a,
The corners 70C of the molding 70 shown in FIG.

The window glass W on which the molding 70 is mounted has a three-dimensionally bent portion near the corner Wc as shown in FIG. In the thickness direction (X), a bent one is often used.

[0008] However, the above molding 70
As shown in FIG. 16 showing a state in which the corner portion 70C is viewed from the glass fitting groove side (wind glass side) at the corner portion (joining portion) 70C, the two molding members 71 and 81 The welding angles of the ends to be joined 71a and 81a, that is, angles γ1 and γ2 of the cut surfaces 71b and 81b of the ends to be joined 71a and 81b with respect to the glass fitting grooves 75 and 85 are substantially right angles. Therefore, at the corner 70C of the molding 70, as shown in FIG. 17, the glass surface Wa and the decorative portions 72, 82 of the molding members 71, 81 are not parallel to each other. Glass fitting groove 7 of 71, 81
However, there is a problem that the fitting property between the molding glass 70 and the window glass W is poor. Further, when the corner 70C of the molding 70 is forcibly mounted on the corner Wc of the window glass W, the so-called opening phenomenon in which the opening sides of the glass fitting grooves 75 and 85 are expanded in the corner 70 of the molding 70. May occur, which is not preferable in appearance.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has been developed in consideration of the above-mentioned problem. The present invention provides a structure and a method for forming the same.

[0010]

According to a first aspect of the present invention, there is provided a projection wherein a leg is provided on the back side of the decorative portion, and a glass fitting groove is formed on a side surface of the leg with the back surface of the decorative portion. A wind molding configured by joining scheduled end portions of two synthetic resin molding members having protruded strips obliquely with respect to a longitudinal direction of the molding member, and joining the cut surfaces together. In the corner portion, each of the cut surfaces of the respective joining scheduled ends is inclined inward from the design surface side of the molding member toward the back side of each molding member, so that the cut surfaces thereof are pressed together. The present invention relates to a structure of a corner portion of a window molding, wherein two molding members are joined.

The invention of claim 2 is characterized in that, in claim 1, the design surface at the joining position of the two molding members is shaped into a smooth curved surface.

Further, according to the invention of claim 3, a leg is projected from the back side of the decorative portion, and a ridge is formed on a side surface of the leg to form a glass fitting groove between the decorative portion and the back surface. A cutting step of cutting the joining end portions of the two molded members made of synthetic resin obliquely to the longitudinal direction of the molding member, and holding the joining end portions of the two molding members in a pair of holding dies, respectively. And melting the joining ends of the two molding members, and then bringing the pair of holding dies closer to each other and crimping the cut surfaces of the joining ends to join together. In the method of forming a corner portion, in the cutting step, each of the joining schedules is set such that a cut surface of each of the joining scheduled ends inclines inward from the design surface side of the molding member toward the back side of the molding member. Cut the end and melt When merging process, the cutting face each other according to the molding method of the corner portion of the window molding, characterized in that joining by crimping predetermined joining ends of the two molding member to surface contact.

Still further, the invention according to claim 4 is the invention according to claim 3.
In, a pair of holding dies, a cavity mold in which a mold surface corresponding to the decorative part side shape of the joining scheduled end of the molding member is formed, and a pressing mold for pushing the ridge side of the joining scheduled end of the molding member The parting portions of the mold surfaces of the pair of cavity molds are formed so as to form a smooth curved surface shape when the cavity molds are closed. In a state where the surface of the decorative part at the end to be joined of each molding member is made to follow the curved surface part of the parting part of the mold surface, the molding member is melted and joined, and the design surface at the joining position of the molding member is smoothed. It is characterized by forming into a curved shape.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing the vicinity of a corner of a wind molding according to one embodiment of the present invention,
FIG. 2 is a view of the vicinity of the corner of the wind molding viewed from the glass fitting groove side, FIG. 3 is a plan view showing a use state of the wind molding, and FIG. 4 is cut along the line bb in FIG. FIG. 5 is a cross-sectional view, FIG. 5 is a view showing a forming apparatus used in an example of a method of forming a corner portion of the wind molding, and FIG. 6 is a cross-sectional view showing a state where ends of two molding members are cut off in the same forming method. 7 is a cross-sectional view showing a state where the ends of the two molding members are held by a molding device and heated, FIG. 8 is a cross-sectional view taken along the line ee in FIG. 7, and FIG. FIG. 10 is a cross-sectional view showing a state where the ends of the members are joined, FIG. 10 is a cross-sectional view taken along the line ff of FIG. 9, and FIG. It is the figure seen from the groove side

A wind molding 10 according to an embodiment of the present invention shown in FIGS. 1 to 3 has a corner portion Wc which has been described with reference to FIGS.
Are mounted around the three-dimensionally bent window glass W. This wind molding 10
The joining scheduled end portions 11a and 21a of the two synthetic resin molding members 11 and 21 extruded into a predetermined cross-sectional shape are connected to each other.
It has a corner portion 10C formed by joining at a predetermined corner angle φ (see FIG. 3). Note that FIG.
FIG. 2 is a view of the vicinity of a corner 10C of the molding 10 as viewed from the glass fitting groove side, that is, a view as viewed from the direction of arrow a in FIG.

The synthetic resin molding members 11 and 21 are:
Made of synthetic resin material such as polyvinyl chloride (PVC),
It has decorative portions 12 and 22 constituting a design surface, and legs 13 and 23 projecting from the back side. Metal legs 14 and 24 for increasing the rigidity of the legs 13 and 23 are embedded in the legs 13 and 23, and ridges 15 and 25 are provided on the side surface of the window glass. Glass fitting grooves 16 and 26 for fitting into the window glass W are formed between the front surfaces of the projections 15 and 25 and the back surfaces of the decorative portions 12 and 22. The glass fitting groove 16,
The width of 26 is determined in consideration of the thickness of the window glass W.

In the illustrated example, two molding members 1
Reference numerals 1 and 21 each have an irregular cross-sectional shape. A lip 17 is formed on the side of the molding member 11 on the left side of the drawing opposite to the ridge 15 of the leg 13, and the molding member 21 on the right side is Such a lip is not formed. The lip 17
When the molding member 11 is mounted around the window glass W, the tip of the lip 17 is pressed against the rising surface Pa of the vehicle body panel P as shown in FIG.
Bend to the side and seal between the standing surface Pa and the leg 13,
A groove for rain gutter is formed on the side surface of the leg portion 13 between the lip 17 and the decorative portion 12. Also, in the illustrated example,
The ridge 25 of the right molding member 21 is longer than the ridge 15 of the left molding member 11. Of course, the present invention can be applied not only to the case where the two molding members 11 and 21 have the irregular cross-sectional shapes as described above, but also to the case where both molding members have the same cross-sectional shape. Symbol G in FIG.
Is the molding member 11, the window glass W and the body panel P
And an adhesive for bonding.

The two molding members 11, 21
Are joined obliquely to the longitudinal direction of the molding member, and the cut surfaces 11b, 21b
The corners 1 of the molding 10 having the corner angle φ are joined and welded together.
0C is configured.

At the corner 10C of the molding 10 according to the present invention, as can be understood from FIG. 2, the cut surfaces 11b, 21b of the respective ends 11a, 21a to be joined are designed surfaces (decorative surface 12s). , 22s)
From the side to the back side (projection back side 15s, 25s side), it inclines inward (direction of arrow Y1, Y2 in the figure) of each molding member 11, 21 so that their cut surfaces 11b, 21b are crimped together. And the two molding members 11 and 21 are joined. Therefore, the angles (welding angles) α1, α2 of the welding surfaces of the molding members 11, 21 with respect to the glass fitting grooves 16, 26 of the cut surfaces 11b, 21b are both greater than 90 °. The angles α1 and α2 are determined so as to be the same as the backward bending angles θ1 and θ2 at the corner Wc of the window glass W (see FIG. 16). With this configuration, the molding 1
0 at the corner portion (joining portion) 10C, that is, at the joining position Z of the two molding members 11 and 21, and the peripheral edge thereof, the decorative portions 12, 22 and the glass fitting grooves 16, 26 are formed at the corner portion Wc of the window glass W. Since it is substantially parallel to the glass surface Wa, the appearance is improved, and the corner portion 10C of the molding 10 can smoothly and reliably follow the corner portion Wc of the window glass W. ) Is dramatically improved as compared with the related art. In addition, window glass W of molding 10
At the time of mounting, the so-called opening phenomenon that the opening side of the glass fitting groove 85 is expanded without applying extra stress to the molding members 11 and 21 as in the related art can be prevented.

Here, like the corner portion 50C of the molding 50 shown in FIG. 11 as another embodiment of the present invention, the end portions 11 to be joined of the two molding members 11 and 21 will be described.
In the case where the cut surfaces 11b and 21b of the first and second molding members 11 and 21 are inclined and the two molding members 11 and 21 are joined without any treatment, the projecting portion is formed on the design surface at the joint position of the two molding members 11 and 21. (Sharp part) T cannot be avoided. Therefore, in the embodiment shown in FIGS. 1 to 3, as in the invention defined in claim 2, the design surface (the surface 12 s, 22 s of the decorative portions 12, 22) at the joining position of the two molding members 11, 21. Are formed into a smooth curved surface shape (R shape) R. In this way, the protrusion of the design surface at the joining position can be eliminated, and the appearance can be further improved.

FIG. 1 shows an example of a method of forming a corner portion of a wind molding disclosed herein.
Or the corner 1 of the molding 10 shown in FIG.
A detailed description will be given of an example in which 0C is molded using the molding apparatus 30 shown in each drawing of FIG. The molding device 30 will be described. The molding device 30 includes a pair of holding dies 31 and 41 that can be divided and combined. In FIG. 5, (A) is a perspective view showing the molding device 30 in an open state,
(B) is a diagram of the molding device 30 in the closed state as viewed from the direction of arrow c in (A), and (C) is a diagram of the molding device 30 in the closed state.
It is sectional drawing cut | disconnected along the -d line. The holding mold 31 on the right side of the figure holds the molding member 11 having the lip 17, while the holding mold 4 on the left side of the figure
1 is for holding the molding member 21 without the lip.

The holding dies 31, 41 are cavity dies 32, 42 in which mold surfaces 33, 43 corresponding to the shape of the end portions 11a, 21a of the molding members 11, 21 corresponding to the decorative portion side are formed in a groove shape. And pressing dies 35 and 45 for pressing the protruding ridge sides of the joining end portions 11a and 21a, respectively. Here, the mold surfaces 33,
43 is formed at predetermined processing angles ω1 and ω2 with respect to the opposing surfaces 34 and 44 of the cavity molds 32 and 42. The angles ω1 and ω2 are determined in consideration of the corner angle φ of the corner 10C of the molding 10 so that the relationship of ω1 + ω2 = φ holds. The mold surfaces 33, 43 of the cavity molds 32, 42 are, as understood from FIG.
The part is inclined so as to become deeper as it approaches the parting parts 33p and 43p in which the vicinity of the joining position of the both molding members is accommodated. The angles β1 and β2 of the inclination are the bending angles θ of the corner portions Wc of the window glass W in the back direction.
1, θ2 (see FIG. 16). Thus, the mold surfaces 33, 4 of the cavity molds 32, 42
3, the molding members 1 are formed on the mold surfaces 33 and 43.
When the end portions 11a and 21a to be joined are placed on the cut surfaces 11b and 2 of the end portions 11a and 21a to be joined.
1b are parallel to each other, and at the time of a fusion bonding process described below,
The cut surfaces 11b and 21b come into surface contact easily. Also, the mold surface 3 of the cavity molds 32 and 42
As can be understood from FIG. 5C, when the space between the cavity molds 32 and 42 is closed, the mold surfaces 33 and 43
The 43 parting portions 33p, 43p and the peripheral portion thereof are formed so as to form a smooth curved surface shape Q.

The molding method of the corner portion of the molding includes a cutting step and a fusion bonding step. First,
In the cutting step, as shown in FIG. 6, at least two synthetic resin molding members 11, 21 extruded to a predetermined length.
Are cut obliquely with respect to the longitudinal direction of the molding member by using an appropriate cutting jig such as a cutter. At this time, as shown in the figure, the cut surfaces 11b and 21b of the respective scheduled joining end portions 11a and 21a are shifted from the design surface (decoration portion surfaces 12s and 22s) side to the back surface (the ridge back surface 15).
(s, 25s) so as to be inclined inward of the molding members 11 and 21 toward the side.

In the next fusion joining step, first, as shown in FIGS. 7 and 8, the mold surfaces 3 of the cavity molds 32 and 42 of the pair of holding molds 31 and 41 which are opposed to each other and abut against each other.
After placing the joining end portions 11a and 21a of the two molding members 11 and 21 on the molding dies 3 and 43, respectively, the cavity dies 32 and 42 and the pressing dies 3 of the holding dies 31 and 41 are placed.
5 and 45, and the end portions 11a and 21a of the molding members 11 and 21 to be joined are held between the corresponding cavity dies 32 and 42 and the pressing dies 35 and 45, respectively. . At this time, the end portions 11a, 2
The cut surfaces 11b and 21b of 1a are separated and parallel to each other, and the respective ends 11a and 21a to be joined are slightly projected from the facing surfaces 34 and 44 of the cavity molds 32 and 42.

Next, the joining end portions 11a, 21a of the molding members 11, 21 are connected to the pair of holding dies 31, 4, respectively.
In the state of being held at 1, the heater is heated and softened by being brought close to the heater H to be melted. In addition, this heating temperature is the molding member 1
It is appropriately determined in consideration of the materials 1 and 21 and the like.

The molding member 1 is heated by the heating.
When the end portions 11a and 21a to be joined are softened and melted, the holding dies 31 and 41 facing each other are brought close to each other as shown in FIGS.
The two cut members 11 and 21 are joined and integrated by press-fitting the cut surfaces 11b and 21b of FIG. Here, this joining (welding) is performed such that the cut surfaces 11b and 21b of the respective end portions 11a and 21a to be joined come into surface contact with each other. In addition, the joining is performed by forming the molding members 11,
21 and the peripheral surface of the decorative portion 12s, 22
s, and thereby the decorative part surface 1
2s and 22s (design surface) are formed into a smooth curved surface shape R at the joining position.

Thereafter, the molding device 30 which has been closed is opened to release the product, and the molding member 1 is removed during the above-mentioned fusion bonding step.
By cutting off excess resin (burrs) generated around the joining positions of Nos. 1 and 21, the corner portion 10C of the molding 10 shown in FIG. 1 is obtained. The holding dies 31, 41 facing each other
Blade portions (not shown) are protruded along the peripheral edges of the mold surfaces (openings) 33, 43 of the opposing surfaces 34, 44 of the (cavity molds 32, 42), and the blade portions are used to simultaneously join the above-described molding members. The surplus resin may be cut and removed.

[0028]

As shown and described above, according to the structure of the corner portion of the wind molding according to the first aspect of the present invention, the cut surface of the end to be joined of the two opposing molding members is from the design surface side to the back surface. Inwardly, each molding member is inclined inward, and the cut surfaces thereof are press-bonded to each other to join the two molding members. Therefore, after the molding is mounted on the window glass, the corners of the molding are removed. The decorative portion and the glass fitting groove are almost parallel to the glass surface of the three-dimensionally bent corner portion of the window glass, and the appearance is extremely good. Further, the corner portion of the wind molding can smoothly and reliably follow the corner portion of the window glass, so that the mountability of both can be dramatically improved as compared with the related art. In addition, if the design surface at the joining position of the molding member is shaped into a smooth curved surface as in the invention of claim 2, it is possible to avoid the appearance of the projection on the design surface at the joining position of the molding member. And the appearance is further improved.

Further, according to the invention of the molding method described in claims 3 and 4, the corner of the wind molding which can be mounted on the window glass whose corner portion is three-dimensionally bent as described above with good appearance and good mounting properties. The part can be formed very easily. Moreover, the structure of the apparatus used for the molding method is simple and economical. In particular, according to the invention of claim 4, the corner portion of the wind molding in which the design surface at the joining position of the molding member defined in claim 2 has a smooth curved surface can be easily formed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the vicinity of a corner of a wind molding according to one embodiment of the present invention.

FIG. 2 is a view of the vicinity of a corner portion of the wind molding viewed from a glass fitting groove side.

FIG. 3 is a plan view showing a use state of the wind molding.

FIG. 4 is a sectional view taken along the line bb of FIG. 3;

FIG. 5 is a view showing a molding apparatus used in an example of a method of molding a corner portion of the wind molding.

FIG. 6 is a cross-sectional view showing a state where ends of two molding members are cut in the molding method.

FIG. 7 is a cross-sectional view showing a state where the ends of the two molding members are held by a molding device and heated.

FIG. 8 is a sectional view taken along line ee of FIG. 7;

FIG. 9 is a cross-sectional view showing a state where ends of two molding members are joined together.

FIG. 10 is a sectional view taken along line ff of FIG. 9;

FIG. 11 is a view of the vicinity of a corner portion of a window molding according to another embodiment, as viewed from the glass fitting groove side.

FIG. 12 is a perspective view showing a front window of a general automobile.

FIG. 13 is a perspective view showing the vicinity of a corner portion of a conventional wind molding.

FIG. 14 is a cross-sectional view illustrating an example of a conventional method of forming a wind molding.

FIG. 15 is a partial perspective view showing a window glass whose corner is bent three-dimensionally.

FIG. 16 is a view of the vicinity of a corner of a conventional wind molding viewed from a glass fitting groove side.

FIG. 17 is a sectional view showing a use state of the wind molding.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Wind molding 10C Corner part of wind molding 11 and 21 Mold member 11a, 21a Planned joining end 11b, 21b Cut surface of planned joint end 12, 22 Decoration part of molding member 12s, 22s Decoration part surface of molding member (design) Surface) 13,23 Leg portion of molding member 15,25 Projecting ridge of molding member 16,26 Glass fitting groove of molding member 30 Molding device 31,41 Holding die 32,42 Cavity die 33,43 Cavity die surface 33p , 43p Parting part of cavity mold surface 35, 45 Smooth curved surface shape of design surface at joint position of press-type R molding member W Wind glass Wc Corner of wind glass

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Koji Oya 8-1, Tocho, Fujii-cho, Anjo-shi, Aichi F-term (reference) 4F211 AD24 AH23 TA01 TC08 TD07 TJ01 TN07

Claims (4)

[Claims] 1. A two-piece synthetic resin made by projecting a leg on the back side of a decorative part and projecting a ridge for forming a glass fitting groove between the side of the leg and the back of the decorative part. In the corner portion of the window molding, the joining scheduled end of the molding member is cut obliquely with respect to the longitudinal direction of the molding member, and the cut surfaces are joined together and joined, That each of the cut surfaces of the molding members is inclined inward from the design surface side of the molding member toward the back side of each molding member, and that the two molding members are joined so that their cut surfaces are pressed together. Characteristic wind molding corner structure. 2. The structure of a corner portion of a wind molding according to claim 1, wherein a design surface at a joining position of the two molding members is formed into a smooth curved surface shape. 3. A two-piece synthetic resin having a leg portion projecting from the back side of the decorative portion and projecting from the side surface of the leg portion to form a glass fitting groove between the leg portion and the back surface of the decorative portion. A cutting step of cutting the joining end of the molding member obliquely with respect to the longitudinal direction of the molding member, and holding the joining end of the two molding members in a pair of holding dies, respectively, And fusing the ends to be joined together, and then joining the cut surfaces of the respective ends to be joined by pressing the pair of holding dies close to each other. In the cutting step, cut each end to be joined, so that the cut surface of each end to be joined is inclined inward of the molding member from the design surface side of the molding member toward the back side, During the fusion joining process, the cutting Forming method of the corner portion of the window molding, characterized in that joining by crimping predetermined joining ends of the two molding member as each other in surface contact. 4. A pair of holding dies press a cavity mold having a mold surface corresponding to a shape of a decorative portion side of an end of the molding member to be joined, and a ridge side of the joining end of the molding member. And a pressing mold, respectively, wherein the parting portions of the mold surfaces of the pair of cavity molds are formed so as to form a smooth curved surface shape when the space between the cavity molds is closed. The molding member is melted and joined in a state where the surface of the decorative portion at the end to be joined of each molding member follows the curved surface portion of the parting portion of the mold surface of the cavity mold, and the design of the joining position of the molding member The method according to claim 3, wherein the surface is shaped into a smooth curved surface.