JP5356915B2 - Synthetic resin biaxial stretch blow molded bottle handle and synthetic resin biaxial stretch blow molded bottle provided with the handle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a handle excellent in durability which can surely prevent itself from coming off from a bottle, and a synthetic resin biaxially-oriented blow-molded bottle equipped with the handle. <P>SOLUTION: The handle 2 of the synthetic resin biaxially-oriented blow-molded bottle has a broad mating surface 2f<SB>1</SB>having a protrusion 2p<SB>1</SB>provided at the end, the handle is held on to a lateral face wall of a PET bottle 1 in such a manner as not to come off, while the mating surface 2f<SB>1</SB>is tapered off in shape with its width dimension gradually reducing toward the protrusion 2p<SB>1</SB>. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  TECHNICAL FIELD The present invention relates to a handle used as an insert when biaxial stretch blow molding of a synthetic resin bottle and a synthetic resin biaxial stretch blow molded bottle having the handle.

  A biaxially stretched blow-molded bottle made of a synthetic resin having a handle is provided with a wide mating surface on the handle used as an insert when biaxially stretched blow-molding a synthetic resin bottle, and a protrusion is formed at the tip of the mated surface. By providing, there exists what prevents dropping from a bottle (for example, refer patent document 1).

Japanese Patent No. 3340901

  However, when the bottle is shaped by performing biaxial stretch blow molding using the handle as an insert product, if the resin is poorly wrapped around the protrusion, the holding of the protrusion by the resin becomes worse. In this case, since the adhesion surface between the protrusion and the resin is reduced, the handle may be easily detached.

  In addition, even if the protrusion and the resin are in close contact with each other, if an impact is applied to the contact portion between the protrusion and the resin by dropping or the like, the portion that forms the corner portion of the close contact portion, particularly the close contact portion, related to the resin Stress concentrates on In this case, the occurrence of cracks based on the same site is also considered.

  An object of the present invention is to provide a handle having excellent durability that can surely prevent dropping from a bottle, and a biaxially stretched blow-molded bottle made of a synthetic resin including the handle.

The present invention is a handle of a synthetic resin biaxially stretched blow molded bottle that has a wide mating surface and is held on the side wall of the synthetic resin biaxially stretched blow molded bottle by a protrusion provided at its tip,
The mating surfaces, reduces thus the width dimension toward the projection, and is characterized in that it has a shape tapering the said protrusion and the width at the tip of該合allowed surface.

  According to the present invention, the mating surfaces can be provided at both ends of the grip portion. In this case, the grip is held and held at both ends of the grip portion. Further, according to the present invention, the mating surface can be provided at one end of the gripping portion, and in this case, the other end of the gripping portion is prevented from coming off by a fitting method different from the mating surface provided at one end. Can be held.

  In addition, when the mating surface according to the present invention is the upper end of the gripping portion, the projection of the mating surface preferably projects obliquely upward toward the bottle, and when the mating surface is the lower end of the gripping portion, the projection of the mating surface is It is preferable to project at least one of obliquely upward and downward toward the bottle. In other words, in the present invention, it is preferable that the protrusion on the mating surface protrudes obliquely upward and obliquely downward toward the bottle.

  Moreover, according to this invention, it can be set as the synthetic resin biaxial stretch blow molding bottle provided with the said handle by using the above-mentioned handle as an insert member.

  According to the present invention, it is easy to wrap around the resin forming the bottle in the region from the protrusion provided at the tip of the mating surface to the mating surface provided with the projection. Thereby, according to the handle according to the present invention, when used as an insert product in biaxial stretch blow molding, the degree of adhesion with the resin is improved, so that the handle can be reliably prevented from falling off and has excellent durability. Can be provided.

  In particular, if the protrusions on the mating surface protrude at least one of obliquely upward and obliquely downward toward the bottle, it is effective in preventing the dropout from the bottle.

  If the above-mentioned handle is used as an insert member and a synthetic resin bottle is integrally formed by biaxial stretch blow molding, a biaxial stretch blow molded bottle excellent in durability that does not drop off the handle can be provided.

(a), (b) is the top view and side view which respectively show the PET bottle provided with a handle which is one form of this invention. (a), (b) is the rear view which shows the same form, respectively, and the side view which shows the preform for blow-molding the PET bottle which concerns on the same form. (a)-(c) is the side view, back view, and front view which respectively show the handle based on the form. (a), (b) is the top view and bottom view which respectively show a handle based on the form. (a), (b) is the upper surface which shows the 2nd form and 3rd form of a handle which are this invention, respectively.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  In FIG. 1, reference numeral 1 is a PET bottle provided with a handle 2. The PET bottle 1 has a mouth part 1a, and a shoulder part 1b connected to the mouth part 1a and a part of the body part 1c are recessed toward the axis O, and the handle 2 is disposed in the recessed area D.

  The code | symbol P of FIG.2 (b) is the preform P which has the opening part 1a. The PET bottle 1 is biaxially stretch blow molded together with the handle 2 by using the preform P with the handle 2 as an insert.

  The handle 2 has an opening A, and a portion located outside the opening A forms the grip portion 2a, while a portion located inside meets the side surface of the body portion 1b of the PET bottle 1. The contact part 2b is formed. The grip portion 2a and the backing portion 2b are integrally connected by an upper end side bridging portion 2c that is a portion on the upper end side and a lower end side bridging portion 2d that is a portion on the lower end side.

In addition, the handle 2 has a wide mating surface 2f ₁ extending in the lateral direction at the upper end of the backing portion 2b, and a protrusion 2p ₁ is provided at the tip thereof. As shown in FIGS. 1 (a) and 4 (a), the mating surface 2f ₁ has a shape that tapers when its width dimension is linearly reduced toward the protrusion 2p ₁ . Further, the protrusion 2p ₁ protrudes obliquely upward toward the PET bottle 1 as shown in FIG.

According to such a configuration, when biaxial stretch blow molding is performed, the end face of the mating surface 2f ₁ is prevented from being stretched toward the protrusion 2p ₁ provided at the tip thereof with respect to the stretch direction of the preform that is radially stretched in the cross section. and thus the can be avoided, in the region of the projections 2p ₁ provided at the tip of the mating surface 2f ₁ up to the mating surface 2f ₁ provided with the projections 2p _1, is included around the resin forming the PET bottle 1 It becomes easy. If such a handle 2 is used as an insert for biaxial stretch blow molding, the degree of adhesion with the resin is improved, and therefore a handle with excellent durability that can reliably prevent the PET bottle 1 from falling off is provided. Can do.

In particular, as in the present embodiment, if the protrusion 2p ₁ is protruded obliquely upward toward the PET bottle 1, it is effective for preventing the drop from the PET bottle.

  Further, as in this embodiment, when the above-described handle 2 is used as an insert member and the PET bottle 1 is integrally blow-molded, a biaxially stretched blow-molded bottle excellent in durability that does not drop off the handle 2 can be provided.

Incidentally, the handle 2 of the present embodiment, the lower end of the backing portion 2b, has a wide mating surface 2f ₂ extending transversely, are two projections 2p _2, 2p ₃ is provided at its distal end. As shown in FIG. 1A and FIG. 4B, the mating surface 2f ₂ has a flat shape whose width dimension extends linearly in the lateral direction. Further, the protrusions 2p ₂ and 2p ₃ protrude obliquely upward and obliquely downward toward the PET bottle 1 as shown in FIG.

That is, the handle 2 of the present embodiment, although the mating surfaces 2f ₂ of the lower end side is similar to the conventional arrangement, it mating surface 2f ₂ of the lower side is similar to the conventional configuration, the mating surfaces of the upper side The above-described effects obtained by adopting the configuration according to the present invention in 2f ₁ are not denied. Therefore, according to the present invention, the upper mating surface 2f _1, the configuration according to the present invention employs the mating surface 2f ₂ of the lower, or the configuration according to the present invention only the mating surface 2f ₂ lower adoption It is also possible to do.

  Here, in Table 1 below, a PET bottle with a handle according to the above-described embodiment is used as an example, and a PET bottle with a handle that does not employ the configuration according to the present invention is used as a comparative example, and the PET bottle is fixed. When the tensile test with respect to the handle at is performed, the limit tensile force (N) until the handle falls off is measured by an autograph.

  As is clear from Table 1 above, in any of the three tests, the example exceeds the limit tensile force until the handle falls off compared to the comparative example. Accordingly, it is clear that the handle is less likely to drop off from the PET bottle 1 than in the comparative example.

5 (a) and 5 (b) show the second and third forms of the handle 2 according to the present invention from the upper end side. In the second embodiment shown in FIG. 5 (a), tapered by mating surfaces 2f ₁ of the handle 2, as shown in the figure, the width dimension is reduced while curved Therefore outwardly towards the projections 2p ₁ The shape to make. Further, in the third embodiment shown in FIG. 5B, the mating surface 2f ₁ of the handle 2 is reduced in its width dimension toward the projection 2p ₁ while being curved inward as shown in FIG. Make a tapering shape.

  The above description shows only one embodiment of the present invention, and various modifications can be made within the scope of the claims. For example, the handle 2 according to the present invention is not limited to the one having the opening A, and may be one in which the backing portion 2b is omitted, for example. Further, the upper end side bridging portion 2c may be omitted, or the lower end side bridging portion 2d may be omitted. In this case, the omitted side is assembled into a bottle neck portion or a trunk portion instead of the bridging portion. What formed the fitting part which sticks can be provided.

In addition, each configuration employed in the present embodiment may be a conventional configuration or a configuration according to the present invention, for example, a plurality of upper end side protrusions 2p ₁ similar to the lower end side protrusions 2p ₂ and 2p _3. Instead, they can be combined as appropriate.

  As this invention, it can employ | adopt as a high capacity | capacitance bottle which contains a drink, a seasoning, or a liquid detergent, a softening agent, a bleaching agent, etc., for example.

DESCRIPTION OF SYMBOLS 1 PET bottle 2 Handle 2a Gripping part 2b Backing part 2c Upper end side bridging part 2d Lower end side bridging part 2f ₁ Upper end side mating surface 2f ₂ Lower end side mating surface 2p ₁ Upper end side retaining projection 2p ₂ Lower end side retaining projection 2p ₃ Lower end retaining protrusion

Claims (5)

A handle of a synthetic resin biaxially stretched blow molded bottle that has a wide mating surface and is held on the side wall of the synthetic resin biaxially stretched blow molded bottle by a protrusion provided at its tip,
The mating surfaces, reduces thus the width dimension toward a projection,該合allowed surface tip at the synthetic resin biaxially stretch blow molded bottles, characterized in that it has a shape tapering the said protrusion and the width of handle.   2. A handle for a synthetic resin biaxially stretched blow-molded bottle according to claim 1, wherein mating surfaces are provided at both ends of the gripping portion.   2. The handle of a synthetic resin biaxially stretched blow-molded bottle according to claim 1, wherein a mating surface is provided at one end of the gripping portion.   The handle of the synthetic resin biaxially stretched blow-molded bottle according to any one of claims 1 to 3, wherein the projection of the mating surface is projected obliquely upward and / or obliquely downward toward the bottle.   A biaxially stretched blow-molded bottle made of synthetic resin, which is integrally biaxially stretched and blow-molded using the handle according to any one of claims 1 to 4 as an insert member.

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