JP2009184212A - Support method of bead with filler and support stand - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance work efficiency by facilitating the takeout of a bead 19 with a filler from a support stand 11. <P>SOLUTION: Since a coarse surface region 27 comprising fine unevenness is formed on the upper surface 23 of the support stand 11 (placing part 13) at the region coming into contact with the inner end part in the radial direction of the filler 18, the inner end part in the radial direction of the filler 18 being in contact with the coarse surface region 27 becomes narrow in its contact area (sticking area) with respect to the upper surface 23 of the support stand 11 to become weak in its adhesion. As a result, if the filler 18 is constituted so as to be peeled from the inside in its radial direction, the bead 19 with the filler is easily peeled from the support stand 11 and work efficiency is enhanced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

    The present invention relates to a support method and a support base for supporting a bead with a filler from below.

As a conventional support for a bead with a filler, for example, the one described in Patent Document 1 below is known.
JP-A-6-182900

  This is a bead with a filler composed of a ring-shaped bead and a bowl-shaped filler made of unvulcanized rubber and having a radially inner end in close contact with the bead. When placed in a state, it supports the bead with filler from the lower side, and when it is made of a plastic such as ABS resin, it remains molded by, for example, an injection molding method or a casting molding method. In the case where it is made of a metal such as steel or aluminum, it is used, for example, as it is formed by press molding or after being subjected to normal mechanical finishing.

    However, since the conventional support base for the beads with filler is manufactured as described above, the upper surface thereof is smooth like a mirror surface, and the filler contacting the entire upper surface is as described above. Since it is composed of unvulcanized rubber having adhesive strength, the filler is strongly adhered to the support base by the adhesive strength, and as a result, when the bead with filler placed on the support base is taken out from the support base There was a problem that the work efficiency was reduced due to the time required for peeling.

  It is an object of the present invention to provide a method for supporting a bead with a filler and a support that can facilitate the removal of the bead with a filler from the support and can improve the work efficiency.

    The purpose of the first object is to provide a bead with a filler composed of a ring-shaped bead and a bowl-shaped filler made of unvulcanized rubber and having a radially inner end in close contact with the bead. By placing the bead with filler from the lower side by the support base on the support base in which the rough surface area is formed on the upper surface in the part in contact with the radial end of the filler while placing the entire lower surface of the filler in contact with each other. This can be achieved by a method for supporting a bead with filler that is supported.

  Second, a bead with a filler composed of a ring-shaped bead and a bowl-shaped filler made of unvulcanized rubber and having a radially inner end in close contact with the bead is in contact with the entire lower surface of the filler. When mounted in a state, it is a support base of a bead with filler that supports the bead with filler from the lower side, and forms a rough surface region on the upper surface of the support base at a portion in contact with the radial end of the filler This can be achieved by using a filler bead support.

  In the present invention, since the rough surface region is formed on the upper surface of the support base at the portion in contact with the radial end portion of the filler, the radial end portion of the filler in contact with the rough surface region is in contact with the upper surface of the support base. The contact area (adhesive area) between them becomes narrow, and the adhesive force becomes weak. As a result, if the filler is peeled off from the inside in the radial direction, the bead with filler can be easily peeled off from the support base, and the working efficiency can be improved easily and reliably.

  Here, the radially outer end portion of the filler usually tends to be peeled off and rounded off from the support base because a large circumferential tensile stress remains inside, and is configured as described in claim 3. If it does so, peeling from the support stand of a radial direction outer end part can be effectively suppressed by the adhesive force similar to the past. Moreover, if comprised as described in Claim 4, a filler can be peeled from a support stand easily enough. Furthermore, if comprised as described in Claim 5, a rough surface area | region can be formed easily and cheaply with respect to the existing support stand.

Embodiment 1 of the present invention will be described below with reference to the drawings.
In FIGS. 1, 2, and 3, reference numeral 11 denotes a substantially rectangular plate-like support base. The support base 11 is made of a plastic such as ABS resin or a metal such as steel or aluminum. When the support 11 is made of plastic, it is molded by, for example, an injection molding method or a cast molding method, and when it is made of metal, for example, by press molding. Molded.

  The support base 11 is integrally formed with at least one mounting portion 13 having a low height, here two spaced apart from each other, and these mounting portions 13 taper in a truncated cone toward the upper side. It has a shape. Reference numeral 17 denotes a ring-shaped bead configured by winding a bead wire of steel or the like a plurality of times. As the cross-sectional shape of the bead 17, round, rectangular, hexagonal and the like are known.

  Reference numeral 18 denotes a filler having a bowl-like shape whose inner end in the radial direction is in close contact with the outer surface in the radial direction of the bead 17, and the filler 18 gradually becomes thinner toward the outer side in the radial direction. The filler 18 is made of hard unvulcanized rubber having a JIS hardness of 50 to 95 degrees. As a result, the surface of the filler 18 has adhesiveness. Thus, the filler-attached bead 19 is configured by mounting the filler 18 on the bead 17.

  Then, after forming such a bead 19 with filler, once placed on the above-mentioned support base 11 in a state of lying down to the horizontal, that is, in a state where the central axis of the bead 17 extends in the vertical direction, While being supported by the support base 11 from below, the bead 17 is in contact with the upper end portion of the conical surface 22 which is the side surface of the mounting portion 13, while the filler 18 is in contact with the upper end portion of the conical surface 22. It contacts on the entire lower surface from the part to the lower end part.

  Here, since the support base 11 is used as it is formed by an injection molding method or the like as described above, or after being press-formed, or subjected to normal mechanical finishing, the conical surface 22 is used. The upper surface 23 including the surface is smooth like a mirror surface, and the filler 18 that is in contact with the entire upper surface 23 is made of unvulcanized rubber having adhesive force as described above. As a result, the filler-attached bead 19 placed on the support table 11 is taken out of the support table 11 with a large amount of adhesive force.

  For this reason, in this embodiment, on the upper end 23 (conical surface 22) of the support base 11 at the portion in contact with the radial end of the filler 18, here the radial inner end and the radial central portion of the filler 18. A rough surface area 27 composed of small irregularities was formed. As a result, the contact area (adhesive area) between the radially inner end and the radial center of the filler 18 in contact with the rough surface region 27 and the upper surface 23 of the support base 11 is reduced. The adhesion is weakened. As a result, if the filler 18 is peeled off from the inside in the radial direction, the bead 19 with filler can be easily peeled off from the support base 11, and the work efficiency can be improved easily and reliably. In this embodiment, the rough surface region 27 is also formed at the radially outer end portion of the top surface 26 of each mounting portion 13.

  Here, the radially outer end portion of the filler 18 usually has a large circumferential tensile stress left inside, and because it is thin, it tends to peel off from the support 11 and round. In the upper surface 23 (conical surface 22) of the support base 11 as shown above, a rough surface region 27 is formed over the entire circumference in a portion in contact with the radially inner end portion and the radial center portion of the filler 18, while the filler If the area in contact with the radially outer end of 18 does not do anything and remains as smooth as before, the radially outer end of the filler 18 peels off from the support 11 and curls with the same adhesive force as before. Is effectively suppressed.

  When the rough surface area 27 as described above is formed when the plastic support base 11 is manufactured, for example, a large number of concentric circles are provided at positions facing the rough surface area 27 on the inner surface of the mold of an injection molding machine or the like. By forming a ridge-shaped ridge, a spiral ridge wound many times, or by forming a large number of protrusions, these ridges, a large number of circumferential grooves in a complementary relationship with the protrusions, a spiral A rough surface region 27 including a groove and a recess is formed on the upper surface 23. Instead of the ridges and protrusions, concave grooves and recesses may be formed on the inner surface of the mold, and the rough surface region 27 including the ridges and protrusions may be formed on the upper surface 23.

  Further, when the rough surface region 27 is formed at the time of manufacturing the metal support 11 such as steel or aluminum, the upper surface 23 is formed by, for example, forming the same protrusions and protrusions as those described above on the die of the press molding machine. The rough surface region 27 composed of grooves and recesses is formed on the upper surface 23, or conversely, the rough surface region 27 composed of protrusions and protrusions is formed on the upper surface 23 by forming grooves and recesses on the mold. Further, when the support base 11 is subjected to a mechanical finishing process, a thin concentric or spiral groove is formed on the upper surface 23 by a cutting process, or a rough surface region 27 is ground by grinding using a coarse grinding wheel. May be formed.

  On the other hand, the rough surface region 27 as described above can be formed on the upper surface 23 after the support 11 is manufactured, for example, by blasting, knurling, or scratching with a wire brush. Here, blasting is a process of projecting steel grit, cut wire, alumina, glass beads, silica sand, etc. onto the product surface using compressed air or rotary blades to form minute irregularities on the product surface. . If such blasting is used, the rough surface region 27 can be easily and inexpensively formed on the existing support base 11.

  The surface roughness of the rough surface region 27 described above is preferably 1 μm or more. The reason is that if the surface roughness of the rough surface region 27 is 1 μm or more, the filler 18 can be peeled off from the upper surface 23 of the support 11 sufficiently easily. Here, the above-mentioned surface roughness is a centerline average roughness measured based on JIS B 0601. The upper limit of the surface roughness is not particularly limited, but is preferably suppressed to a level that does not affect the strength of the support base 11. In this embodiment, as shown in FIG. 4, a large number of circumferential grooves having a substantially V-shaped cross section are formed concentrically on the upper surface 23 of the support base 11, so that a large number of ridges having a radius of 1 mm are formed. A rough surface region 27 composed of a semicircular line is formed.

Next, the operation of the first embodiment will be described.
First, a filler-attached bead 19 is manufactured by attaching a filler 18 made of unvulcanized rubber around the bead 17 using a filler mounting device (not shown). Next, the bead 19 with filler thus manufactured is placed on the support base 11 in a lying state, and the bead 19 with filler 19 is stored while being supported from below by the support base 11. At this time, the filler 18 contacts the conical surface 22 over the entire lower surface.

  Next, after a predetermined number of the support bases 11 on which the beads 19 with fillers are placed are stacked on a storage cart (not shown), the support bases 11 are transported to a storage space and used for manufacturing pneumatic tires. Keep until. Next, when using the above-described bead 19 with a filler for manufacturing a pneumatic tire, after the storage cart is transported to the vicinity of a forming drum (not shown), the support base 11 and the bead 19 with a filler 19 from the upper stage side. Are sequentially taken out and the bead 19 with filler is supplied to the molding drum.

  At this time, as described above, the rough surface region 27 is formed on the upper surface 23 of the support base 11 at the portion in contact with the radial end portion of the filler 18, here the radial inner end portion and the radial central portion of the filler 18. Therefore, the contact area between the radially inner end portion and the radial center portion of the filler 18 in contact with the rough surface region 27 with the upper surface 23 is narrowed, and the adhesion force is weakened. As a result, if the operator grasps the bead 17 and peels off the filler 18 from the inside in the radial direction, the bead 19 with filler can be easily peeled off from the support base 11, and the work efficiency is improved easily and reliably. Can be made.

    In the above-described embodiment, the support base 11 on which the beads 19 with fillers are placed is stacked on the storage cart. In the present invention, one side end of the support base 11 that is separated in a number of vertical directions. When the bead 19 with filler is placed on the support base 11, the support base 11 is swung to a horizontal state and the bead 19 with filler is taken out, 11 may be swung upward (bounced up).

  Further, in the above-described embodiment, the rough surface region 27 is formed on the upper surface 23 of the support base 11 at the portion that contacts the radially inner end portion of the filler 18, but the portion that contacts the radially outer end portion of the filler 18 It may be formed on the upper surface 23 of the support base 11 in FIG. Furthermore, in the above-described embodiment, the rough surface region 27 is formed over the entire circumference of the conical surface 22, but in this invention, if the formation location of the rough surface region 27 is easily visible, the conical surface The rough surface area 27 may be formed in a part of the circumferential direction of 22, for example, about a half circumference.

  The present invention can be applied to the industrial field of a support base that supports a bead with a filler from below.

It is a partially broken top view which shows Embodiment 1 of this invention. It is a perspective view of a support stand. It is II sectional view taken on the line of FIG. It is an expanded sectional view near a rough surface area.

Explanation of symbols

11 ... Support 17 ... Bead
18… Filler 19… Bead with filler
23… Top 27… Rough surface area

Claims (5)

    A bead with a filler composed of a ring-shaped bead and a flange-shaped filler made of unvulcanized rubber and having a radially inner end in intimate contact with the bead, at a portion in contact with the radial end of the filler The bead with filler is supported from the lower side by the support table by placing the filler on the support table having a rough surface area formed on the upper surface while contacting the entire lower surface of the filler. Support method for beads with filler.     A bead with a filler composed of a ring-shaped bead and a flange-shaped filler made of unvulcanized rubber and having a radially inner end in close contact with the bead is placed with the entire lower surface of the filler in contact with the bead. A filler-supported bead support for supporting the bead with filler from the lower side, wherein a rough surface region is formed on the upper surface of the support in a portion in contact with the radial end of the filler. A support base for beads with filler.     The support base of the bead with a filler according to claim 2, wherein a rough surface region is formed on an upper surface of the support base at a portion contacting both the radially inner end portion and the radial center portion of the filler.     The support base for a bead with filler according to claim 2 or 3, wherein the surface roughness in the rough surface region is 1 µm or more.     The support base for a bead with a filler according to any one of claims 2 to 4, wherein the rough surface region is formed by blasting.

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