JP3015025B1 - Inserts and trims for trim - Google Patents

Abstract

An object of the present invention is to provide a trim insert and a trim that can be easily formed and have high strength. SOLUTION: A plurality of bone pieces 21 of an insert 15 are connected to a first connecting portion 23 at one longitudinal end of the bone pieces 21.
As a result, the second connecting portion 25 and the temporary fixing portion 24 having the separation hole 26 at the other end are connected to each other. The temporary fixing portions 24 and the second connecting portions 25 are alternately arranged via the bone pieces 21. In the separation step after the extrusion, the temporary fixing portion 24
By weakening and separating the portion corresponding to the separation hole 26, the other end side of each bone fragment 21 in the insert 15 is separated into two bone fragments in rubber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trim used as a sealing material or a decorative material for an automobile or the like, and an insert embedded in a polymer material such as rubber or resin for maintaining the shape of the trim. is there.

[0002]

2. Description of the Related Art As this kind of trim, there is known a trim in which a metal plate insert for retaining the shape of the trim body is embedded in a trim body made of a polymer material such as rubber or resin. I have. The trim main body is bent in a substantially U-shaped cross section, and a lip is provided on an inner surface of the trim main body for holding a flange portion or the like in an opening of an automobile.

As shown in FIG. 6, as an insert 51 buried in this trim, for example, a plurality of bone fragments 52 are used.
A ladder-like structure is known in which a connecting portion 53 and a temporary fixing portion 54 forming a row of bonding portions are mutually connected at a predetermined interval. The insert 51 is formed by punching a sheet metal to simultaneously form the bone pieces 52, the slits 55 between the bone pieces, the connecting portions 53 that interconnect the bone pieces 52, and the temporary fixing portions 54. It has become something.
A groove 56 is formed by, for example, notching the temporary fixing portion 54 serving as a bond portion in one row.

When the trim is manufactured, the insert 51 is used as a core material and supplied to an extruder for the polymer material to extrude the trim body. Next, the trim main body is repeatedly bent, and the
After the groove 56 is cut off, the trim main body is bent into a substantially U-shaped cross section.

[0005] As described above, the insert 51 is supplied to the extruder in a state where the bone pieces 52 thereof are connected to each other by the temporary fixing portions 54 and the connecting portions 53, so that the insert 51 is inadvertently deformed during extrusion molding. Is suppressed. Further, in the product trim, since the bone pieces 52 are interconnected by the connecting portion 53, the trim is not inadvertently stretched when assembling the trim to a flange portion of an automobile or the like. Assemblability is ensured. Further, the temporary fixing portion 54 is repeatedly bent so that the groove portion 5 is formed.
By being separated at 6, the trim can be easily curved in a lateral direction or the like by following the flange portion of the trim.

[0006]

However, in the above-mentioned conventional structure, the insert 51 must be formed by stamping a sheet metal into a ladder shape, and then separately forming a groove 56 by notch processing in the temporary fixing portion 54. There was a problem that the processing was troublesome.

Further, in the above-mentioned conventional structure, since the groove portion 56 is formed in all of the temporary fixing portions 54 in one row,
By repeating bending to separate the groove 56,
The trim body is easily bent for each bone fragment 52. For this reason, there has been a problem that metal fatigue is originally generated in the connecting portion 53 for connecting the bone pieces 52 to each other, and the strength of the trim main body in the product trim may be insufficient. As a result, there is a possibility that good assemblability in the product trim may be reduced.

The present invention has been made by paying attention to such problems existing in the prior art. It is an object of the present invention to provide a trim insert and a trim that can be easily formed and ensure high strength.

[0009]

In order to achieve the above object, the invention according to claim 1 of the present application is embeded in a polymer material of a trim, and a plurality of bone fragments and the bone fragments are formed into a predetermined shape. In a sheet metal insert having two rows of bond parts interconnected at an interval, holes are formed in every other bond part in one of the bond parts. is there.

According to a second aspect of the present invention, there is provided a trim including a trim main body made of a polymer material and having an insert embedded therein and bent to have a substantially U-shaped cross section. And two rows of bonding parts interconnecting the bone fragments at predetermined intervals, and an insert having a hole formed in every other bonding part in one of the bonding parts is embedded therein. At the same time, the bond portion in one of the two rows of bond portions respectively arranged on the side wall portion of the trim main body is cut off at a position corresponding to a hole formed on the bond portion, whereby 1
It is characterized in that every other is separated.

According to the first and second aspects of the present invention, the repeated bending in the state where the insert is buried causes the one row of the bond portions to correspond to the holes formed on the bond portions. Locations are selectively disconnected. Since this hole is formed in every other bond portion, the trim body is not repeatedly bent for each bone fragment by the repetition of the bending, and a decrease in the strength of the insert and the trim body is suppressed.

In addition, the holes can be provided at the same time when the insert is formed by punching, so that the number of steps in manufacturing the insert can be reduced.
Further, by changing the diameter of the hole forming pin in the punching die, the strength of the portion corresponding to the hole of the bond portion can be easily adjusted.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a weather strip having a trim mounted on a flange of an opening of an automobile or the like; FIG.

As shown in FIGS. 1 and 2, the weather strip 11 is made of, for example, EPDM (ethylene-propylene-propylene).
A dimple (triene copolymer) is provided with a trim body 12 made of solid rubber and having a substantially U-shaped cross section, and a trim 14 composed of a flange holding lip 13 protruding inside the main body. The flange holding lip 13 sandwiches a flange portion (not shown) of an opening of a vehicle body panel or the like, and
On the vehicle body panel. Inside the trim body 12, an insert 15 made of sheet metal is embedded. A hollow seal portion 17 elastically abutting against an outer peripheral portion of a door panel (not shown) and sealing between the door panel and the vehicle body panel is formed of EPDM sponge rubber on the outer side of the outer side wall 16a of the trim body 12. The projection is formed.

When assembling the weather strip 11 to the vehicle body,
For example, it is necessary to curve the trim 14 at the corner of the door opening edge along the curvature of the corner. Therefore, the insert 15 is required to have a function of bending three-dimensionally in the longitudinal direction in a bent shape having a substantially U-shaped cross section.

The insert 15 has a thickness of about 0.5 m, for example.
m, a plurality of bone pieces 21 and slits 22 alternately arranged in the longitudinal direction thereof, a first connection part 23 forming a number of bond parts connecting the bone pieces 21 in two rows, and a temporary fixing part. 24 and a second connecting portion 25. The dimensions of the bone fragments 21 and the slits 22 are both, for example, [0.5 to 4.0.
0 mm] × [20 to 40 mm].
The width dimensions of the temporary fixing portion 25 and the temporary fixing portion 24 are, for example, 1.0 to 4.0.
0 mm. Here, in the bent form of the weather strip 11, the first connecting portion 23 is disposed on the inner side wall 16b of the trim main body 12, and the temporary fixing portion 24 and the second connecting portion 2 are provided.
5 is arranged on the outer side wall 16a of the trim main body 12.

The row of the temporary fixing portion 24 and the second connecting portion 25 corresponding to the hollow seal portion 17 is provided with a separating hole 2 as a hole.
The temporary fixing portions 24 in which the holes 6 are formed and the second connecting portions 25 in which the separation holes 26 are not formed are alternately provided via the bone pieces 21. That is, the temporary fixing portion 24 and the second connecting portion 25 constitute a bond portion in one row.
Each separation hole 26 is formed substantially at the center of the temporary fixing portion 24 so as to occupy about 40 to 70% of the area of the temporary fixing portion 24.

Next, an apparatus for manufacturing the insert 15 will be described. FIG. 3 shows the insert 1
5 is a schematic view showing a punching device for manufacturing No. 5; FIG.
In the drawing, the insertion roller 31 and the press 32 are sequentially arranged from the left side.
And a take-off roller 33 are arranged. On the lower surface of the press 32, the insert 15
A punching die 35 for punching and forming the bone fragment 21, the slit 22, the connecting portions 23 and 25, the temporary fixing portion 24, and the separation hole 26 is mounted. As shown in FIG. 4, the punch 35 has a slit 22 of the insert 15.
A plurality of blade portions 36 are formed so as to correspond to the shape of. A pin 38 for forming the separation hole 26 protrudes inside the corresponding portion 37 of the blade portion 36 corresponding to the temporary fixing portion 24 of the insert 15.

Each time the press 32 punches out the sheet metal 34, the insertion roller 31 and the take-up roller 33
Are intermittently rotated, and the sheet metal 34 is moved step by step by a predetermined amount, so that the elongated insert 15 is formed. The insert 15 thus formed
Is once wound on a reel and supplied to the next extrusion molding step.

Next, the insert 1 thus formed is
5, manufacturing steps after extrusion molding for manufacturing the weather strip 11 will be described. As shown in FIG. 5, the insert 15 supplied from the reel is supplied to an extruder 41 for extruding the trim 14 and the hollow seal portion 17. In this extruder 41, the trim main body 12 and the flange holding lip 13 are extruded with EPDM solid rubber using the insert 15 as a core material, and the hollow seal portion 17 is extruded with EPDM sponge rubber at the same time. At this time, the trim 14 is wrapped around the flat-shaped insert 15 as shown by a two-dot chain line in FIG.
It is extruded in a substantially flat shape by coating with PDM rubber. Extruded weather strip 1
1 is passed through a vulcanizing tank 42 to vulcanize the EPDM rubber, and is then taken up by a take-up machine 43.

The vulcanized weatherstrip 11 is repeatedly bent in the longitudinal direction by a plurality of rollers 45 by a separator 44 while applying tension thereto, and the vulcanized weatherstrip 11 corresponds to the separation hole 26 of each temporary fixing portion 24 having the weakest strength. Vulnerable in position and cut off. Thereby, each bone fragment 21 of the insert 15
While the mutual connection by the first connecting portion 23 is maintained,
The two connecting pieces 25 are connected by two bone pieces at a time.

Finally, the weather strip 11 is guided to a bending machine 46, in which the trim 14 is plastically deformed into a substantially U-shaped cross section by a plurality of rollers 47 having a concave surface and a convex surface. As a result, the weather strip 11 having the sectional shape shown in FIG. 2 is completed.

Therefore, according to the present embodiment, the following effects can be obtained. (A) In the weather strip 11 of the present embodiment, the bone pieces 21 of the insert 15 are connected to each other by the first connection part 23 at one end side of the bone piece 21 in the longitudinal direction. Further, each bone fragment 21 has a temporary fixing portion 24 having a separation hole 26 on the other end side in the longitudinal direction of the bone fragment 21.
And a second connecting portion 25 having no separating hole 26, and are alternately connected.

For this reason, in the weather strip 11, each bone fragment 21 is connected to the first connecting portion 23 by repeating bending while the insert 15 is embedded in the trim 14.
While maintaining the mutual connection by the second connection part 25 and the connection by every two bone fragments by the second connection part 25, the bond part in one row is
4 are selectively separated at positions corresponding to the separation holes 26. As described above, the insert 11 is not repeatedly bent for each bone piece 21 by repeating the bending.

Accordingly, the bone pieces 21 of the insert 11 are not separated from each other, and a decrease in strength of the insert 11 and the trim main body 12 can be suppressed.
Good assemblability in the weather strip 11 can be ensured.

(B) Weather strip 1 of the present embodiment
In the first insert 15, a separation hole 26 is formed in the temporary fixing portion 24 in order to separate each bone fragment 21 into two bone fragments after vulcanizing the EPDM rubber of the trim 14.

The separation holes 26 can be provided simultaneously when the insert 15 is formed into a predetermined shape by punching. For this reason, it is not necessary to perform notch processing in order to form the groove 56 after performing punching processing as in the conventional configuration. Therefore, the number of steps in manufacturing the insert 15 can be reduced, and the manufacture of the insert 15 is facilitated.

The separation hole 2 in the punching die 35
By changing the diameter of the pin 38 for forming 6, the strength of the temporary fixing portion 24 can be easily adjusted. (C) In the insert 15 of the weather strip 11 of the present embodiment, the bone pieces 21 are extruded in a state of being connected to each other in a ladder shape by the first connecting portion 23, the temporary fixing portion 24, and the second connecting portion 25. Machine 41.

For this reason, at the time of the extrusion molding, it is possible to suppress the occurrence of troubles such as the careless inclination of the moving direction of the insert 15 to hinder the molding.

(Modification) The embodiment of the present invention may be modified as follows. -In the said embodiment, the trim 14 and the hollow seal part 1
7 was composed of EPDM, but rubber other than EPDM,
It may be made of a soft resin material such as polyvinyl chloride.

In the above embodiment, the present invention is embodied in the weather strip 11 having the hollow seal portion 17 on the vehicle outer side wall 16 a of the trim 14, but the present invention is embodied in a trim not having the hollow seal portion 17. You may.

In the above-described embodiment, the bond portion to be separated, that is, the temporary fixing portion 24 is arranged on the outer side wall 16a. However, this may be arranged on the inner side wall 16b. .

With these arrangements, substantially the same effects as those of the above embodiment can be obtained. In addition, in the said embodiment, although the insert 15 was comprised from the metal plate 34, as the metal plate 34 here, for example, an iron plate, an aluminum plate,
Various alloy plates, such as a copper plate and stainless steel, are mentioned.

[0034]

As described in detail above, according to the first and second aspects of the present invention, molding is easy, high strength can be secured, and good assemblability in a product trim can be achieved. Can be secured.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view and a plan view showing an embodiment of a trim insert according to the present invention and a form at the time of extruding a weather strip in which the trim insert is embedded.

FIG. 2 is a sectional view showing a bent form of the weather strip of FIG. 1;

FIG. 3 is a schematic view showing an insert manufacturing apparatus.

FIG. 4 is a partial bottom view showing a part of the punching die of FIG. 3;

FIG. 5 is a schematic view showing an extruding step and subsequent steps of a weather strip manufacturing step.

FIG. 6 is a perspective view showing a conventional trim insert.

[Explanation of symbols]

12 ... trim body, 14 ... trim, 15 ... insert,
Reference numeral 16a: an outer side wall as a side wall portion; 16b, an inner side wall as a side wall portion; 21, a bone fragment; 23, a first connection portion forming a bond portion; 24, a part of a bond portion in one row; A temporary connecting portion, 25 ... a second connecting portion constituting a part of the bond portion in one row, 26 ... a separating hole as a hole, 34 ... a sheet metal.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-11-48304 (JP, A) JP-A-61-177946 (JP, U) JP-B 3-76256 (JP, B2) JP-B Showa 31- 10432 (JP, B1) US Pat. No. 3,256,577 (US, A) US Pat. No. 3,165,793 (US, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60R 13/06 B60J 10/08 B60J 5/00 501

Claims (2)

(57) [Claims] 1. A sheet metal insert embedded in a polymer material of a trim and having a plurality of bone fragments and two rows of bonding parts interconnecting the bone fragments at a predetermined interval. A trim insert characterized in that holes are formed in every other bond portion in one row of the bond portions. 2. A trim having a trim body made of a polymer material having an insert embedded therein and bent to have a substantially U-shaped cross section, wherein a plurality of bone fragments and the bone fragments are separated by a predetermined distance. And two rows of bond portions interconnected with each other, wherein inserts each having a hole formed in every other bond portion in one of the bond portions are buried, and each of the insert portions is formed in a side wall portion of the trim main body. The bonding portion in one of the two rows of bonding portions arranged is separated at every other position by being separated at a position corresponding to a hole formed on the bonding portion. trim.