JPS6234846Y2 - - Google Patents

Description

[Detailed description of the invention] The core material for sealing materials of this invention relates to improvement of the core material for weather strips, trims of automobile doors, engine bonnets, etc., and other sealing materials. In each row between opposing grooves in the lateral direction of the groove, two or more short-spaced parts that are easily cut and one wide-spaced part are set to have high flexibility and stable appropriate tensile resistance. The aim is to create a core material that is easy to cut.

This core material is usually a thin strip-shaped flat plate of metal about 0.5 mm in diameter, with two or more grooves and two or more longitudinal holes perforated in each row in the horizontal direction, and is made of an elastic polymeric material such as rubber or plastic. After covering and embedding a rubber-like substance using an extruder and hardening and molding, the short distance part is cut in the breaking process, and it is curved in a direction perpendicular to the longitudinal direction so as to fit into the mounting part of the sealing member. This constitutes the sealing material.

The basic structure of a conventional elongated belt-shaped core body made of a thin plate is shown in FIGS. 1 and 2.

That is, the core body 1 in FIG. 1 has longitudinal holes 2 arranged in parallel with their ends aligned in a direction perpendicular to the longitudinal direction, leaving side widths SW of the same length in the longitudinal direction on both sides. A notch 4 is formed on the side edge at a relative position of the two, and an engraved part 3 is formed between the notch 4 and the elongated hole 2 so as not to penetrate to the back surface.

In this case, in the braking process,
The strips 5 between each other are separated into pieces in the covering rubber. The seal member is curved in a direction perpendicular to the longitudinal direction so that it can be fitted into the attachment portion of the seal member.

In Fig. 2, the longitudinal holes 2 are provided in a zigzag shape, and wide portions 6 and gap portions 7 are alternately formed between the notch 4 of the side edge 8 and the longitudinal holes 2, and the gaps are formed in the braking process. This is for cutting the section 7.

In this case, the cuts are formed alternately, so
The strip portions 5 do not fall apart and are continuous in a zigzag pattern within the covering rubber.

The former case shown in FIG. 1 has the following drawbacks.

B. During the manufacturing of the seal member, a considerable tensile force is applied to the core, which may cause it to break and come apart during the extrusion process or vulcanization process.

○B Even if the core body does not fall apart, it will fall apart by cutting the core embedded in the rubber to a certain length and then subjecting it to the braking process.
Items that are longer than a certain length and are dimensionally unstable are considered.

○C If a tensile force is applied to the sealing member while the core body is in pieces and the sealing member is cut to a certain required length, the resulting shrinkage will result in a dimensionally unstable product.

○D When the completed seal member is installed in a predetermined location, the tensile force in the length direction will be uneven, resulting in uneven sealing effect of the sealing part, and if the installation location has a large curvature, the sealing part will be uneven. falls down.

○E This center body forms a through-embossed part and a non-through-embossed part, and is stretched both vertically and horizontally by pressing and stretching, and the through-embossed part is opened to form a longitudinal hole 2, and the side width is Since the SW portion is formed to have a particularly thin thickness, cutting defects at the stamped portion often occur during this pressing and stretching process.

In consideration of the above-mentioned drawbacks, it is necessary to eliminate the non-penetrating embossed portion in order to prevent it from falling apart, and the structure thereof is shown in an example in FIG.

The exemplary core shown in FIG. 2 has wide portions 6 and narrow portions 7 alternately formed between the side edge portion 8 and the longitudinal hole 2;
It has a structure in which the cut portion is obtained by forming the gap 7 near the side edge 8, and stress concentration is not obtained in the cut portion during the braking process, so the cut portion is not easily cut and requires a considerable number of braking cycles. Moreover, the number of times of cutting is also variable and varies widely, and there is a drawback that the adhesion between the covering rubber and the core body is reduced by the time it is completely cut, and the rubber is seriously damaged. It also has the disadvantage that it does not provide good performance.

Therefore, in order to make it easier to cut during the braking process, the inventors reduced the cross-sectional area of the short-distance parts, provided two or more short-distance parts between the horizontal grooves, and dispersed them. We devised a core material structure that provides flexibility and appropriate tensile resistance.

This core material for sealing material has grooves having curved tips of the same height in the lateral direction arranged in parallel at equal intervals in the longitudinal direction on both sides of a thin metal band-shaped plate. In each row between the grooves, two or more longitudinal holes are bored, a short interval is provided between the longitudinal holes and between the longitudinal hole and one groove, and a wide interval is provided between the other groove and the longitudinal hole. It is configured as follows. By dividing the longitudinal hole into two or more holes in this way, it is possible to obtain more appropriate resistance and elasticity in the longitudinal direction than in the case of one continuous hole.

In addition, in order to be easily cut during the braking process, the short-distance portion is formed by forming the cross-sectional area as small as possible between the groove, the longitudinal hole, and the curved tips of the longitudinal holes, and The area near the upper and lower covering rubber-like substances is formed in a connected state to strongly sandwich and hold it elastically, and the bending stress that is repeated during the braking process is concentrated locally between the curved tip parts. In addition, by dispersing the small cross-sectional areas and short intervals, which are local areas of concentration, into multiple locations in the horizontal direction, the vertical and horizontal directions of the core material relative to the rubber-like material are It is formed to provide high flexibility while increasing the supporting force, and a wide spaced part is formed between the mutually curved tip parts of the groove part and the elongated hole on the other side, and a short spaced part and a wide spaced part are formed. Each row is alternately arranged in opposite directions to provide a stable and appropriate tensile resistance. Note that the shapes of the curved tip portions of the groove portion and the elongated hole are not limited to those shown in the drawings of the embodiment, and various colored deformation curves may be considered as necessary.

Aspects of the invention will now be described in more detail with reference to exemplary drawings showing embodiments.

Figure 3 shows an example in which two elongated holes of different lengths are provided in the same row in the lateral direction, and the curved tips of the same height in the lateral direction are provided on both sides of the sealing material core material CS of this invention. A large longitudinal hole 10 with a relatively long diameter and a small longitudinal hole 11 with a relatively short length are formed between the groove portion 9 having a relatively long diameter.
between the groove 9 and the small longitudinal hole 11 and the large longitudinal hole 10.
and the small elongated hole 11, there is a short spaced part SI with a small cross-sectional area.
There is an arrangement in which a total of two locations are provided, and one wide spaced portion WS is provided between the large longitudinal hole 10 and the groove portion 9 at the other end, and the arrangement is alternately set in opposite directions in the longitudinal direction.

Figure 4 shows an example in which three longitudinal holes of two different lengths are provided in the same horizontal row between the opposing grooves 9 on both sides, with 121 medium longitudinal holes of medium length and Two small longitudinal holes 11 are provided, and one is provided between the medium longitudinal hole 12 and the small longitudinal hole 11, and between the small longitudinal hole 11 and the small longitudinal hole 1.
A total of three short spaced parts SI with a small cross-sectional area are provided between the slot 1 and the groove part 9, and one wide spaced part WS is provided between the long hole 12 at the other end and the groove part 9.The arrangement is alternately reversed in the longitudinal direction. It is set in the direction.

FIG. 5 shows an example in which two medium-longitudinal holes 12 of the same length are provided in the same row in the horizontal direction between opposing grooves 9 on both sides, and between the medium-longitudinal holes 12 and between the medium-longitudinal holes 12. A total of two short spaced parts are provided between the groove parts 9, and one wide spaced part WS is provided between the medium longitudinal hole 12 at the other end and the groove part 9.
The arrangement provided at locations is alternately set in opposite directions in the longitudinal direction.

FIG. 6 shows an example in which three small elongated holes 11 of the same length are provided in the same row in the lateral direction.

That is, as illustrated in FIGS. 3 to 6, it is constructed by freely combining longitudinal holes of various lengths, and in short, two or more longitudinal holes are provided in each row in the horizontal direction. The basic configuration is to provide a total of two or more short-spaced sections by drilling, and one wide-spaced section between the other groove and the longitudinal hole. Note that the short-spaced portion and the wide-spaced portion are indicated by dotted lines on the drawings.

As described above, because of the above structure, the core material for the sealing material of this invention is easily and intensively cut in the braking process with a small number of braking cycles. Therefore, a suitable durable sealing material can be obtained with less damage to the covering rubber-like substance and less deterioration in clamping adhesive properties. In addition, two or more short-spaced parts and one wide-spaced part are arranged alternately in opposite directions, so it has high flexibility, stable and appropriate tensile resistance, and eliminates the risk of deformation and distortion. It has characteristics that are not found in other countries.

The core material for the sealing material of this invention is coated with a rubber-like substance, molded and cured, as shown in the perspective view of FIG. 7, which shows an example of the sealing material, and then subjected to a braking process. As shown in the figure, the sealing material is formed by bending.

In the figure, CS is a core material for the sealing material, 13 is a rubber-like substance, 14 and 15 are protruding parts, 16 is a sealing part, 9 is a groove, 10 is a large longitudinal hole, and 11 is a small longitudinal hole.

[Brief explanation of the drawing]

Figures 1 and 2 are partial plan views of conventional core material;
3 to 6 are partially enlarged plan views of the core material for sealing material of this invention, FIG. 7 is a partially enlarged perspective view of the sealing material during molding, and FIG. 8 is a partially enlarged perspective view of the core material for the sealing material of this invention. FIG. 2 is a partially cutaway partial perspective view of a U-shaped core-containing sealing material. US...Heart material for sealing material, SI...Short interval part, WS
...Wide interval part, 10...Large longitudinal hole, 11...Small longitudinal hole, 12...Medium longitudinal hole.

Claims (1)

[Scope of utility model registration request] In the core material embedded in a rubber-like substance, grooves having curved tips of the same height in the lateral direction are provided in parallel at equal intervals in the longitudinal direction on both sides of a thin metal strip plate, and grooves are arranged in parallel at equal intervals in the longitudinal direction. In each row between opposing grooves of A total of two or more short spaced parts are provided between the mutually curved tip parts of the other groove part and the longitudinal hole, and one wide spaced part is set between the mutually curved tip parts of the other groove part and the longitudinal hole, alternating in the longitudinal direction. A core material for sealing material, which is characterized by being arranged at equal intervals in opposite directions.