JP4880507B2 - Trim insert - Google Patents

Description

  The present invention relates to a trim mounted on a door opening or the like of an automobile, and more particularly, to an improvement of a metal trim insert embedded as a core material thereof.

  The trim is used as a cushioning material, a decoration material, and a sealing material, for example, a so-called weather strip attached to a door opening of a vehicle body. In this type of trim, a sheet metal insert is often embedded in a long molded product of rubber or synthetic resin as a core material for shape retention.

  The sheet metal insert embedded in the trim includes, for example, bone pieces 111 and 111 arranged in parallel at a predetermined interval and a bond portion 112 that connects the bone pieces 111 in the longitudinal direction, as indicated by reference numeral 110 in FIG. Become. The trim insert 110 is stamped and formed into a flat plate shape. Usually, the trim insert 110 is supplied in a flat plate shape when the trim body is extruded and embedded by integral molding. For example, the trim 100 having a predetermined cross-sectional shape as shown in FIG. 8 is formed. In FIG. 8, reference numeral 101 denotes a molded product main body, 102 denotes a fitting portion attached to a flange formed at the door opening of an automobile, 103 and 104 denote lip portions thereof, and 105 denotes elastic contact with the door panel. It is a seal part which buffers and seals between a door panel and the opening part of a door.

  As described above, the trim insert is integrally formed and bent together with a long trim molded product. And in the installation location of a trim, the fitting force as a trim must be maintained. Therefore, it is natural that the trim insert has shape retention as the core material of the trimmed trim, but it must have sufficient rigidity to withstand the shear resistance of the extruded material when the trim molded product is extruded. I must.

  In general, the bone fragment 111 of this type of insert 110 has an elongated shape with a width of 2 to 3 mm and a length (size in the width direction as a whole of the insert) of 20 to 40 mm. In this case, a sheet metal having a thickness of 0.4 to 0.5 mm is used. However, like the trim insert 110 </ b> A shown in FIG. 9, the protrusion 115 is formed in the length direction on one surface side of the bone fragment 111. Thus, functions such as rigidity and strength of the bone fragment 111 can be improved to reduce the thickness of the sheet metal (see, for example, Patent Document 1).

However, it is desired to reduce the thickness of the sheet metal used for the insert in order to reduce the weight of the trim molded product, reduce the cost, and effectively use material resources. However, in the structure like the insert 110A, when the thickness of the sheet metal is further reduced, the trim molded product is reduced in weight and cost compared to the general insert 110 in which the protrusion 115 is not formed on the bone fragment 111. However, the rigidity and strength of the bone fragment portion 111 cannot be sufficiently ensured, and the bone fragment portion 111 is deformed by the resin pressure at the time of integral extrusion molding of the trim 100 so that the parallel state is obtained. There is a risk that the function as an insert may be impaired. Therefore, in recent years, a trim insert that can improve rigidity, strength, and the like than the insert 110A in which the protrusion 115 is formed on one surface side of the bone fragment 111 without increasing the thickness of the sheet metal of the insert is eagerly desired. Has been.
Japanese Patent Laid-Open No. 2003-200791

  The present invention has been made in view of the above points, and is a sheet metal trim insert that can improve functions such as rigidity and strength of a bone fragment portion without increasing the thickness of the insert as compared with the prior art. It is to provide.

  That is, the invention according to claim 1 is the sheet metal trim insert in which the flat bone pieces arranged in parallel with each other at a predetermined interval are connected via the bond portion, and the bone pieces are in the longitudinal direction on the upper surface side. The first bone piece portion having the upper ridge portion formed on the upper surface and the second bone piece portion having the lower ridge portion formed in the length direction on the lower surface side are alternately formed. Related to the trim insert.

  The invention according to claim 2 relates to the insert for trim according to claim 1, wherein a fracture bond portion that is fractured after molding is formed between the first bone piece portion and the second bone piece portion.

  The invention according to claim 3 relates to the insert for trim according to claim 2, wherein the fracture bond portion is formed in the vicinity of both end portions of the first bone piece portion and the second bone piece portion.

  The invention according to claim 4 is the trim according to claim 1, wherein an inclined bond portion is formed between the first bone piece portion and the second bone piece portion so as to be inclined with respect to the length direction. Related to the insert.

  According to a fifth aspect of the present invention, the inclined bond portions adjacent to each other through the first bone piece portion or the second bone piece portion are formed to be inclined in the opposite direction to the length direction. Related to the insert for trim.

  The trim insert according to the invention of claim 1 is a sheet metal trim insert in which flat bone pieces arranged in parallel at a predetermined interval are connected via a bond portion. The first bone piece portion having the upper ridge portion formed in the length direction and the second bone piece portion having the lower ridge portion formed in the length direction on the lower surface side are alternately formed. Therefore, the rigidity and strength of the bone fragment can be increased without increasing the plate thickness as compared with the conventional trim insert. Furthermore, the bending direction of the insert is not limited to one, and integral molding with the trim molded product can be easily performed.

  Since the fracture | rupture bond part fractured | ruptured after shaping | molding is formed between the said 1st bone piece part and the 2nd bone piece part in invention of Claim 2 in Claim 1, the branch flow which arises in the said insert is formed. In addition to being able to avoid this, deformation during integral molding with the trim main body can be prevented, and further, flexibility when the trim is attached to the vehicle is improved.

  The invention of claim 3 is the invention according to claim 2, wherein the fracture bond portion is formed in the vicinity of both end portions of the first bone piece portion and the second bone piece portion, so that the bone piece portion is integrally formed with the trim. Sometimes it becomes difficult to deform.

  According to a fourth aspect of the present invention, in the first aspect, an inclined bond portion that is inclinedly connected to the length direction is formed between the first bone piece portion and the second bone piece portion. It is possible to maintain the deformability and flexibility in the three-dimensional direction.

  According to a fifth aspect of the present invention, in the fourth aspect, the inclined bond portions adjacent to each other via the first bone fragment portion or the second bone fragment portion are formed so as to be inclined in opposite directions with respect to the length direction. Therefore, the deformability and the flexibility of the trim in the three-dimensional direction can be further improved.

The present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a plan view showing a part of a trim insert according to an embodiment of the present invention, FIG. 2 is a sectional view of an essential part of the trim insert of FIG. 1, and FIG. 3 is a diagram of a trim insert according to a second embodiment. FIG. 4 is a plan view showing a part of a trim insert according to the third embodiment, FIG. 5 is a plan view showing a part of the trim insert according to the fourth embodiment, and FIG. It is the schematic which shows the measuring method of the compressive strength of the insert for trims of FIG.

  The sheet metal trim insert 10 according to one embodiment of the present invention shown in FIG. 1 and FIG. 2 has a plate-shaped bone fragment portion 11 arranged in parallel at a predetermined interval by punching and connected via a bond portion 12. The bone fragment portion 11 is formed by alternately forming the first bone fragment portion 20 and the second bone fragment portion 30. In the trim insert 10, each bone piece portion 11 is formed by chamfering both end portions.

  In the embodiment, the length of the bone fragment portion 11 (the width of the trim insert 10) is 32.0 mm, the width is 2.0 mm, the thickness is 0.35 mm, and each bone fragment portion 11 (with the first bone fragment portion 20 and The distance between the second bone fragment portions 30) (the width of the bond portion 12) is 1.4 mm, the width of the end portion of the bone fragment portion 11 is 1.2 mm, and the length of the chamfered portion of the bone fragment portion 11 is 1.0 mm. Composed.

  As shown in FIGS. 1 and 2, the first bone fragment 20 has an upper ridge 25 formed in the length direction a on the upper surface 11 </ b> A side. The illustrated upper ridge portion 25 is formed so as to project linearly from the vicinity of one side end portion of the first bone piece portion 20 to the vicinity of the other side end portion and integrally with the lower surface 11B toward the upper surface 11A side. Moreover, in the upper side protrusion part 25 of an Example, the width | variety is 1.0 mm and the protrusion height b from 11 A of upper surfaces is 0.15 mm. Although not shown, the upper protrusion 25 may be formed up to both ends of the first bone fragment 20.

  As shown in FIGS. 1 and 2, the second bone fragment 30 has a lower protrusion 35 formed in the length direction a on the lower surface 11 </ b> B side. The illustrated lower ridge 35 is formed so as to protrude linearly from the vicinity of one side end of the second bone piece 30 to the vicinity of the other end and to the lower surface 11B integrally with the upper surface 11A. The length is the same as that of the upper ridge portion 25 of the first bone piece portion 20. Moreover, in the example lower side protrusion 35, the width is 1.0 mm, and the protruding height c from the lower surface 11B is 0.15 mm. Although not shown, the lower protrusion 35 may be formed up to both ends of the second bone fragment 30.

  A sheet metal constituting the trim insert 10 is made of various alloy plates such as an iron plate, an aluminum plate, a copper plate, and stainless steel, and the bone piece portion 11 and the bond portion 12 are formed by press-cutting the flat plate. Further, the upper and lower ridge portions 25 and 35 of the first and second bone fragment portions 20 and 30 are formed simultaneously or sequentially in the same press machine.

  The trim insert 10 </ b> A shown in FIG. 3 forms a fracture bond portion 13 that is fractured after molding between the first bone piece portion 20 and the second bone piece portion 30 as defined in the invention of claim 2. It is a thing. The fracture bond portion 13 is formed to be narrower than the bond portion 12, and is configured to be cut during bending after being integrally formed with the trim molded product. By forming the fracture bond portion 13, branch flow generated in the trim insert can be avoided, and the bone fragment portion 11 can withstand shear resistance of the extruded material and prevent deformation when integrally formed with the trim body. Furthermore, since it is broken when it is attached to the vehicle as a trim, the flexibility is improved.

  The trim insert 10B shown in FIG. 4 has the fracture bond portion 13 (13A, 13B) in the vicinity of both end portions of the first bone piece portion 20 and the second bone piece portion 30 as defined in the invention of claim 3. Formed. In this way, by forming the fracture bond portions 13A and 13B in the vicinity of both end portions of the first bone piece portion 20 and the second bone piece portion 30, the bone piece portion 11 is less likely to be deformed when integrally formed with the trim. .

  The trim insert 10 </ b> C illustrated in FIG. 5 is connected to the first bone piece portion 20 and the second bone piece portion 30 so as to be inclined with respect to the length direction a as defined in the invention of claim 4. An inclined bond portion 14 is formed. Since the inclined bond portion 14 is formed so as to be inclined with respect to the length direction a of the bone fragment portion 11 as shown in the drawing, the inclined bond portion 14 is inclined when the insert 10C is bent. Even in a state where the bone fragment portion 30 is connected, the three-dimensional deformability and flexibility in the trim can be maintained.

  Further, as shown in the figure and defined as the invention of claim 5, the inclined bond portion 14 includes the inclined bond portions 14 </ b> A and 14 </ b> B adjacent via the first bone piece portion 20 or the second bone piece portion 30. Each of them is preferably formed so as to be inclined in the opposite direction with respect to the length direction a. Thereby, it becomes possible to suppress inadvertent deformation at the time of integral molding with the trim main body, and the deformability in the three-dimensional direction of the trim in a state where the first bone piece portion 20 and the second bone piece portion 30 are connected. Flexibility can be further improved.

  Next, the compressive strength (rigidity) of the trim insert of the present invention will be described using the measuring method shown in FIG. In this measuring method, the trim insert 10 is bent in a direction perpendicular to the length direction a of the bone fragment portion 11 in the same manner as the shape when integrally molded and bent together with the trim molded product. It is transformed into a mold. Further, in the measuring apparatus 50 shown in FIG. 6, the pressing member 51 that pressurizes the insert 10 with a predetermined pressing force by the pressing surface 51 </ b> A inclined at a predetermined angle according to the bent shape of the insert 10, and the insert 10 are placed. A pedestal 52 to be fixed and a fixing member 53 for fixing the insert 10 to the pedestal 52.

  In the illustrated compressive strength measurement method, the bent trim insert 10 is placed on the pedestal portion 52 with the end of the bone fragment portion 11 facing upward, and the pressurizing member 51 is placed above the insert 10. The pressing surface 51 </ b> A is brought into contact with both end portions of the bone fragment portion 11 by being lowered, and the drag force when the both end portions of the bone fragment portion 11 are pressed outward is measured.

  The result of measuring the compressive strength of the trim insert 10 of the present invention was 11.24 (kgf). Further, as a first comparative example, the compressive strength of the insert in which each bone fragment portion was formed in a flat plate shape (no protrusions were formed) was 7.74 (kgf). Furthermore, as a second comparative example, the result of measuring the compressive strength of the insert having a protrusion formed on one side of each bone fragment was 9.66 (kgf). In the insert 10 and the inserts of the first and second comparative examples, the conditions such as the thickness of the sheet metal, the width of the bone fragment 11, and the interval between the bone fragments 11 were the same.

  From the above measurement results, in the trim insert 10 of the present invention, when the conditions such as the thickness of the sheet metal are the same, the compressive strength is 40% to that of the flat plate-like insert in which no protrusion is formed on the bone fragment. About 50%, it turned out that it is excellent about 10 to 20% from the insert in which the protrusion part was formed in the one surface side of the bone fragment part.

  As described above, in the trim insert 10 according to the present invention, the bone fragment portion 11 connected through the bond portion 12 includes the first bone fragment portion 20 having the upper protrusion portion 25 and the lower protrusion portion 35. By forming the second bone fragment portion 30 alternately, it is possible to use a conventional product such as an insert in which the bone fragment portion is formed in a flat plate shape or an insert in which a ridge portion is formed on one surface side of the bone fragment portion. In comparison, the rigidity and strength of the bone fragment 11 can be increased. In particular, in the trim insert of the embodiment, the thickness of the bone fragment 11 is set to 0.5 mm of the thickness of the sheet metal used in the conventional trim insert in which no protrusion is formed on the bone fragment. Even when 0.35 mm is reduced by 0.15 mm, rigidity and strength comparable to conventional products can be provided.

  Furthermore, in this insert 10, the upper ridge portion 25 formed on the upper surface 11 </ b> A side of the bone fragment portion 11 and the lower ridge portion 35 formed on the upper surface 11 </ b> B side of the bone fragment portion 11 are alternately connected. Therefore, the bending direction of the insert 10 is not limited to one, and integral molding with the trim molded product can be easily performed.

  It should be noted that the trim insert of the present invention is not limited to the above-described embodiment, and can be implemented by appropriately changing a part of the configuration without departing from the spirit of the invention. For example, in the embodiment, the shape of the upper and lower protrusions is a trapezoidal cross section, but is not limited to this shape, and may be an appropriate shape.

It is a top view which shows a part of insert for trims concerning one Example of this invention. It is principal part sectional drawing of the insert for trims of FIG. It is a top view which shows a part of insert for trims concerning 2nd Example. It is a top view which shows a part of insert for trims concerning 3rd Example. It is a top view which shows a part of insert for trims concerning 4th Example. It is the schematic which shows the measuring method of the compressive strength of the insert for trim. It is a top view which shows a part of conventional insert for trim. It is sectional drawing of the trim which embed | buried the conventional insert for trims integrally. It is principal part sectional drawing of the conventional insert for trims which formed the protrusion part in the one surface side of the bone piece part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Insert for trim 11 Bone piece part 12 Bond part 20 1st bone piece part 25 Upper rib part 30 Second bone fragment part 35 Lower rib part

Claims (5)

In the trim insert made of sheet metal in which the flat bone pieces arranged in parallel at a predetermined interval are connected via the bond portion,
The bone fragment portion has a first bone fragment portion having an upper ridge portion formed in the length direction on the upper surface side, and a second bone fragment having a lower ridge portion formed in the length direction on the lower surface side. The insert for trim characterized by being formed alternately with the part.   The insert for trim according to claim 1, wherein a fracture bond portion that is fractured after molding is formed between the first bone fragment portion and the second bone fragment portion.   The trim insert according to claim 2, wherein the fracture bond portion is formed in the vicinity of both end portions of the first bone piece portion and the second bone piece portion.   The insert for trim according to claim 1, wherein an inclined bond portion is formed between the first bone piece portion and the second bone piece portion so as to be inclined with respect to the length direction.   The trim insert according to claim 4, wherein each of the inclined bond portions adjacent to each other through the first bone piece portion or the second bone piece portion is formed to be inclined in a direction opposite to the length direction.

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