JPH04349024A - Weather strip - Google Patents

Abstract

PURPOSE:To improve appearance and prevent rusting on a weather strip such as door glass run, etc., for a car by certainly preventing exposure of the cut end of an insert; enhance the appearance of the part around a form connect ion part by lessening it; and reduce tone slide resistance of a door glass by elongating the guide part. CONSTITUTION:A weather strip is provided with a form connection part 3 formed at the end of an extruded piece 1 equipped with a trim part 6 having approx. U-profile where an insert 8 is embedded. The end of extruded part 1 has a cut surface of a cutting part 4 which is cut in steps while one side wall of the trim part 6 is left. The form connection part 3 is consolidatedly fitted with a covering 9 enclosing the cut surface.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to weather strips for automobile door glass runs, etc., and more particularly to the structure of an extruded body-shaped connection part having a trim part in which an insert is embedded.

0002

[Prior Art] Door glass runs installed near the door belt line of automobiles usually have two upper and lower sides with different cross-sectional shapes.
It is constructed by connecting the extruded bodies of books at a mold connection part formed by molding. The extruded body above the door belt line is provided with a trim part with a substantially U-shaped cross section that is attached to the flange part of the door sash, and a guide part that slides and guides the window glass.The trim part is equipped with a reinforcing sheet metal. A manufactured insert is buried. On the other hand, the extruded body below the door belt line does not have a trim part and is provided with only a guide part fitted into a retainer. After each extruded body is cut to a required length, each extruded body is set in a mold with its ends facing each other at a predetermined interval, and the mold connection part is molded between the ends and integrated. connected to.

FIG. 6 is a front view showing a conventional door glass run near the door belt line. In the same figure, 21 is an extruded body installed above the door belt line,
Both the trim portion 26 and the guide portion 27 are cut horizontally in a straight line at the ends thereof. Further, one side wall of the trim portion 26 also serves as one side wall of the guide portion 27, and a sheet metal insert 28 is embedded within the trim portion 26. Note that the insert 28 may be exposed at the above-mentioned cut surface due to the rubber being stretched due to the cutting process. 2
Reference numeral 2 denotes an extruded body mounted below the door belt line, and is formed only of a guide portion 30 without an insert. Then, these extruded bodies 21 and 22 are
Their ends are set in a mold (not shown) with their ends facing each other at a predetermined interval, and a molding material is injected between the ends to form a mold connection part 23, and both extruded bodies 21 and 22 are integrated. is connected to. During this molding, a part of the molding material is also filled in the cut surface of the trim part 26 to form a covering part 29, and the exposed end of the insert 28 is buried in the covering part 29 to improve the appearance. At the same time, they were designed to prevent rust.

0004

[Problems to be Solved by the Invention] However, in the conventional door glass run, the trim portion 26 cannot be formed long due to the installation on the door, and the mold connecting portion 23 becomes large accordingly, resulting in an unsightly appearance. The problem was that it got worse. Additionally, each guide portion 27 is generally provided in the mold connecting portion 23.
, 30, the sliding resistance of the door glass increases as the size of the connecting portion 23 increases.

[0005] Therefore, an object of the present invention is to reliably prevent the cut end of the insert from being exposed, thereby improving the appearance and preventing rust, and further reducing the size of the mold connection to improve the appearance of the vicinity of the connection. In addition, it is an object of the present invention to provide a weather strip that can reduce the sliding resistance of a door glass by increasing the length of the guide portion.

[0006]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the weather strip of the present invention includes a mold connection part at the end of an extruded body having a trim part having a substantially U-shaped cross section in which an insert is embedded. The end of the extruded body has a cut surface cut into a step shape leaving one side wall of the trim part, and the mold connection part has a cut surface that covers the cut surface. It is characterized in that the covering part is provided integrally.

[0007] Here, the shape of the weather strip is not particularly limited as long as it is an extruded body having a trim portion, but in the case of an automobile door glass run, two weather strips are arranged above and below the door belt line. To form-bond the book extrusion, the end of the upper extrusion with the trim section is cut in steps, leaving one side wall of it at the trim section. Then, at the same time as the mold connection part is molded, a covering part covering the cut surface of the extruded body is molded along the cut line. Also, in this case,
If a protrusion is provided on the mold and the remaining side wall of the trim part of the extruded body is held in a position away from the bottom of the mold cavity during molding, the end of the insert will be reliably placed inside the sheathing part. It will be buried in

[0008]

According to the weather strip of the present invention, the cut end portion of the insert embedded in the trim portion can be reliably prevented from being exposed by the covering portion, thereby improving the appearance and preventing rust. Furthermore, since the extruded body is cut into steps leaving one side wall of the trim part, the mold connection part can be made smaller to improve the appearance of the area around the connection part, and the guide part, which has been treated with a lubricant treatment, can be cut into steps. The sliding resistance of the door glass can be lowered by making it longer.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples embodying the present invention will be described below with reference to the drawings. 1 to 5 show an example in which the present invention is embodied in a door glass run for an automobile, and FIG. 1 is a sectional view showing a mold structure for molding the mold connection part of the door glass run;
FIG. 2 is a front view showing the door glass run near the door belt line, and FIG. 3 is a cross-sectional view of the first extrusion body taken along line A-A in FIG.
4 is a cross-sectional view taken along line B-B in FIG. 2 showing the cross-sectional shape of the first extruded body at the stepped cut portion, and FIG. 5 is a cross-sectional view taken along line C in FIG. 2 showing the cross-sectional shape of the second extruded body. - It is a sectional view along line C.

The automobile door glass run of this embodiment is as follows:
As shown in FIG. 2, the trim portion 6 is located above the door belt line, has an insert 8 embedded therein, and has a substantially U-shaped cross section.
A first extruded body 1 equipped with a door belt line and a second extruded body 2 which is disposed below the door belt line and consists only of a guide part 10 without an insert are connected by a mold connecting part 3. The first extruded body 1 and the second extruded body 2 are each made of EPDM.
It is formed by cutting an extruded product made of a solid rubber material such as (ethylene-propylene-diene copolymer) into the required length, and is connected to the mold connection part 3 which is the end of the first extruded body 1. At the end, a stepped cut part 4 is provided which is cut into a crank shape, leaving one side wall of the trim part 6 having an insert 8.

That is, as shown in FIG. 3, the first extruded body 1 includes a trim portion 6 that is inserted and attached to a flange portion (not shown) of a door sash, and a guide that slides and guides a door glass (not shown). A reinforcing sheet metal insert 8 is embedded in the trim portion 6. As shown in FIG. 4, in the stepped cut portion 4 of the first extruded body 1,
The trim part 6 is cut away leaving one side wall, and a covering part 9 covering the insert 8 is molded simultaneously and integrally with the mold connecting part 3 on the cut surface. On the other hand, as shown in FIG. 5, the second extruded body 2 is provided with only a guide portion 10 having the same cross-sectional shape as the guide portion 7 of the first extruded body 1 without an insert.

As shown in FIG. 1, the mold 12 for molding the mold connecting portion 3 is composed of an upper mold 13, a lower mold 14, a middle plate 15, and a middle mold 16. The lower mold 14 is the covering part 9
cavity 17 for molding, and this cavity 1
The cut surface of the one side wall of the trim part 6 is held at a position separated from the bottom surface of the cavity 17 by the projection 18 which abuts on the outside of one side wall of the trim part 6 left in the vicinity of the trim part 7. It is configured to

[0013] Using the mold 12 configured as described above, the mold connecting portion 3 is
When molding, first, the first and second extruded bodies 1 and 2
is cut to the required length, and the first extruded body 1 has a stepped cut portion 4.
is formed. Next, the cut ends of each of the extruded bodies 1 and 2 are set in the mold 12, and in that state, it is filled with molten rubber material. This creates a space between the ends of each extruded body 1 and 2 as shown in FIG.
The mold connection part 3 having the shape shown in is molded, and
A covering portion 9 is formed in the stepped cut portion 4 of the first extruded body 1 along the cut line using the cavity 17 of the lower die 14 . During molding of the covering part 9, one side wall of the trim part 6 is held in a normal position by the protrusion 18 of the lower die 14, so that the cut end of the insert 8 is inserted into the cavity 1.
The cut end is held at a position spaced apart from the bottom surface of the cover 9, and the cut end is completely buried within the cover 9. Therefore, insert 8
It is possible to reliably prevent exposure of the cut end of the material, improving the appearance and preventing rust. Furthermore, since the first extruded body 1 is cut into steps leaving one side wall of the trim part 6, the mold connection part 3 is made smaller to improve the appearance of the vicinity of the connection part, and a lubricating treatment is applied. Guide part 7
By increasing the length, the sliding resistance of the door glass can be lowered.

[0014] In the above embodiments, the present invention is embodied in a door glass run, but the present invention may also be applied and embodied in a weather strip attached to various parts of an automobile. The present invention can be suitably applied to various types of weather strips in which a mold connection part is formed in a stepped cut part. Further, it is also possible to arbitrarily change the shape and structure of each part without departing from the spirit of the present invention, such as by appropriately changing the position of the protrusion of the mold.

[0015]

[Effects of the Invention] As detailed above, according to the present invention, the cut end of the insert is reliably prevented from being exposed, the appearance is improved and rust is prevented, and the mold connection part is made smaller and the connection is made easier. This has the excellent effect of improving the appearance of the area around the guide part and reducing the sliding resistance of the door glass by lengthening the guide part.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a mold structure for molding a mold connection part of a door glass run for an automobile according to a first embodiment of the present invention.

FIG. 2 is a front view showing a door glass run near the door belt line.

FIG. 3 is a sectional view taken along line AA in FIG. 2;

FIG. 4 is a sectional view taken along line BB in FIG. 2;

FIG. 5 is a sectional view taken along line CC in FIG. 2;

FIG. 6 is a front view showing a conventional door glass run near the door belt line.

[Explanation of symbols]

1 First extruded body
2 Second extruded body 3 Mold connection part
4 Step cut section 6 Trim section
8 Insert 9 Covering section

Claims (1)

[Claims] 1. A weatherstrip in which a mold connection part is formed at the end of an extruded body having a trim part having a substantially U-shaped cross section in which an insert is embedded, the end of the extruded body having a trim part having a substantially U-shaped cross section. What is claimed is: 1. A weather strip having a cut surface cut into a step shape leaving one side wall of the part, and wherein the mold connection part is integrally provided with a covering part that covers the cut surface.