JP2007039135A - Handle body and plastic bottle with handle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a handle body and a plastic bottle with a handle by which anxiety in bottle strength and mounting strength of the handle is eliminated, since the bottle wall of the lower side of a lower mounted arm is thin and it becomes easy to open a hole. <P>SOLUTION: The handle body equipped with a grip section and a mounted arm projecting in a lateral direction from both sides of the top and bottom of this grip section is the handle body which is characterized in that a flange is formed which projects continuously from the upper side of the end of the lower mounted arm to both sides and the lower side of the end of the lower mounted arm is made not to form a projecting section. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a plastic bottle with a handle in which a separate handle is attached to a bottle body.

  In recent years, plastic bottles with handles that have a separate handle attached to the bottle body made of plastic such as polyester resin represented by polyethylene terephthalate, which is lighter and more impact resistant than glass, have been put to practical use. A grip provided with a grip and a mounting arm projecting laterally from both upper and lower ends of the grip on the handle mounting recess formed on the side surface of the bottle body, and the tip of the mounting arm is a wall in the handle mounting recess A plastic bottle with a handle that is embedded and embedded in the market is distributed in the market.

  As shown in the front cross-sectional view of FIG. 6, this plastic bottle with a handle projects a separate handle 3 in advance into the blow molding die, and the tips of its attachment arms 32 and 33 project into the blow molding die. The bottle body 1 is blow-molded in the blow-molding mold, and at the same time, it is manufactured by a method in which the tip portions of the mounting arms 32 and 33 are wrapped by the bottle wall 20 and integrated. . Further, projecting pieces 321 and 330 are formed outwardly at the front portions of the mounting arms 32 and 33, and the projecting pieces 320 and 330 are also embedded in the bottle wall 20 so as to prevent detachment.

  However, in the above-described conventional plastic bottle with a handle, in particular, when a resin that is not slippery, such as the same material as the bottle body 1, is selected as the material of the handle 3, the lower bottle wall 201 of the lower attachment arm 33 is extremely low. There was a problem that the bottle strength and the attachment strength of the handle were uneasy, such as thinning and easy opening of holes.

  As a result of diligent studies to solve the above problems, the present inventors have determined that when the handle material is a resin that slides poorly with the bottle body, when the bottle body is blow-molded and simultaneously integrated with the handle, It has been found that the bottle wall tends to become thinner toward the outside due to friction with the lower protruding piece of the lower attachment arm tip of the handle, resulting in damage or overstretching, and the present invention has been achieved. The gist of the handle body includes a grip portion and an attachment arm that protrudes laterally from both the upper and lower sides of the grip portion. A grip body, and a grip mounting recess formed on the side surface of the bottle body, and a grip portion Lateral from both upper and lower ends of the grip In a plastic bottle with a handle, which is attached to a handle having a mounting arm projecting from the top of the lower mounting arm from the upper side of the lower mounting arm. It is a plastic bottle with a handle, characterized in that a flange that continuously protrudes from both sides is formed, and the lower side of the tip of the lower attachment arm is not formed with a protrusion.

  Since the handle body and the plastic bottle with the handle of the present invention have formed the flange portion that continuously protrudes from the upper side of the tip of the lower mounting arm to both sides, when the bottle body is blown and integrated with the handle at the same time Since the ridge that protrudes continuously is smooth, the bottle wall moves smoothly and wraps along the buttock, and the lower side of the tip of the lower attachment arm does not form a protrusion. There is an advantage that friction is relatively small with the lower surface of the lower attachment arm tip, and it is smoothly stretched, and that the bottle wall has a sufficient thickness even on the outer side.

  Since the grip body and the plastic bottle with the handle of the present invention are formed with a flange that continuously protrudes from the upper side of the lower mounting arm to both sides, when the bottle body is blow-molded and integrated with the handle at the same time In addition, since the ridge that protrudes continuously is smooth, the bottle wall moves smoothly along the buttock and wraps, and the lower side of the tip of the lower mounting arm does not form a protrusion, so the bottle wall and handle The lower surface of the lower attachment arm tip portion has a relatively small friction and is smoothly extended outward, and maintains a sufficient thickness even when the bottle wall is close to the outside.

  The bottle main body of the present invention uses a plastic, for example, a polyester resin typified by polyethylene terephthalate, to first form a tubular material (hereinafter referred to as a preform) which is an intermediate product by injection molding, and then the preform. In the case of polyethylene terephthalate, it is set in a blow mold while heated to 90 to 120 ° C., and high pressure air is blown into the preform to obtain biaxial stretch blow molding.

  In the present invention, a polyester resin represented by polyethylene terephthalate, polypropylene, polyethylene or the like can be used for the handle.

  In particular, when the same polyester resin as the bottle body is used as the handle body, it can be treated together with the body when recovered and recycled, and recycled resin can be used as the handle body. Therefore, it is preferable.

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

  1 is a front view and a side view showing an example of the handle body of the present invention, FIG. 2 is an enlarged front view of the vicinity of the lower attachment arm of FIG. 1, FIG. 3 is a cross-sectional view taken along the line AA in FIG. FIG. 5 is a partially cutaway side view showing an example of a plastic bottle with a handle according to the present invention, and FIG. 6 is a conventional plastic with a handle. It is a partially cutaway side view showing an example of a bottle.

  As shown in FIGS. 1 to 4, the handle body of the present invention is a handle body provided with a grip portion 31 and mounting arms 32 and 33 projecting laterally from both upper and lower sides of the grip portion 31. A handle body characterized in that a flange portion 4 that continuously protrudes from the upper side of the tip portion of the arm 33 to both side portions is formed, and the lower side of the tip portion of the lower attachment arm 33 is not formed with a protrusion portion. 3.

1 to 4, the handle body of the present invention forms the flange portion 4 that continuously protrudes from the upper side of the front portion of the lower attachment arm 33 to both side portions, and the front portion of the lower attachment arm 33. The lower side may be a basic shape that does not form a protruding portion, but the height h ₄₀ of the upper side 40 of the flange portion 4 is 2 to 5 mm, and the protruding width Ws ₄₁ of both side protruding portions 41 of the flange portion 4 is 0.5. to 3 mm, overall width W ₄ of the flange 4 is dependent on the size of the bottle preferably in the range of 20 to 30 mm.

  As the shape of the collar portion 4 in the handle body of the present invention, as shown in a front view in FIG. 2, a large chamfered portion 42 is formed on both sides on the upper side, the central portion of the upper side 40 is high, and both side protruding portions A trapezoidal shape with a corner that gradually decreases toward 41, or a chamfered portion 42 that is further enlarged into a triangular rice ball shape as shown in the front view of FIG. 4, or not shown. A rectangular shape with a rounded corner can be used, but the bottle wall moves more smoothly along the large chamfered portion 42 of the buttock and wraps, so the trapezoidal shape of the corner shown in FIG. 2 or the whole of FIG. A shape having a chamfered portion 42 having a triangular rice ball shape is preferable.

If the height h _{40 of the} upper side is less than 2 mm, or the protruding width Ws ₄₁ on both sides is less than 0.5 mm, the amount of engagement with the bottle wall 20 is too small, and the retaining effect may be insufficient. Yes, if the height h _{40 of the} upper side exceeds 5 mm, or the protruding width Ws ₄₁ on both sides exceeds 3 mm, the bottle wall cannot sufficiently get over the collar 4, and the upper surface and both sides of the lower mounting arm 33 The above range is preferable because a large gap may be formed between the surface and the bottle wall 20 to deteriorate the appearance.

  In the grip body of the present invention, the inner plate 51 and the outer plate 52 are placed in the center as shown in FIG. 3 between the grip portion 31 and the mounting arms 32 and 33 protruding laterally from the upper and lower sides of the grip portion 31. By adopting a cross-sectional H-shaped structure connected by the vertical ribs 53, sufficient strength can be obtained while being lightweight.

In the handle of the present invention, the lower mounting arm 33, as shown in FIG. 3, when the advance wider than the tip width Ws ₃₃ of the width W ₃₃ of the grip-side grip portion side, shown in Figure 5, the grip The vertical stress applied from the portion 31 is preferable because it is distributed over a wide surface on the lower bottle wall of the lower attachment arm 33 and is less likely to buckle.

  In the handle body of the present invention, as shown in FIGS. 1 to 4, the tip portion of the lower attachment arm 33, the inner plate 51 and the outer plate 52 are close to the tip surface (position of 3 mm or less from the tip surface). A transverse cross section (cross section perpendicular to the length direction) connected by the central vertical rib 53 is preferably an H-shaped structure. This is because if it is intended to obtain sufficient strength without taking the H-shaped structure, it is necessary to increase the thickness accordingly, and if the thickness is increased, due to shrinkage in the cooling process when the handle body is injection-molded, This is because, in particular, a dent (also referred to as a sink) is likely to occur on the front end surface, and a high-strength H-shaped structure can reduce the thickness.

  In order to manufacture the handle body 3, it is usual to use an injection mold (not shown) which is composed of a movable mold and a fixed mold, and both molds can be divided from a portion corresponding to the center of the handle body 3. However, when the grip portion 31 and the lower attachment arm 33 have an H-shaped cross section (cross section perpendicular to the length direction) in which the inner plate 51 and the outer plate 52 are connected by the central vertical rib 53, the injection is performed. Since there is no undercut portion that forms a resistance against the other dividing directions and the direction of removing the product handle 3, there is an advantage that the process of dividing both molds and taking out the product handle 3 becomes easy.

  As shown in FIGS. 2 and 5, the plastic bottle with a handle of the present invention has a grip portion 31 and a mounting arm that protrudes laterally from the upper and lower ends of the grip portion on a handle mounting recess 2 formed on the side surface of the bottle body 1. In the plastic bottle with a handle formed by attaching the grip provided with 32, 33 so that the tip of the mounting arm 33 is embedded in the wall 20 in the grip mounting recess, the grip is attached to the tip of the lower mounting arm 33. The handle-equipped plastic bottle is characterized in that the flange portion 4 continuously protruding from the upper side to both sides is formed, and the lower side of the tip portion of the lower mounting arm 33 is not formed with the protruding portion.

  In the plastic bottle with a handle of the present invention, when the bottle body is blow-molded and integrated with the handle body 3 at the same time, the continuously projecting ridge portion 4 is smooth, so the bottle wall 20 is on both sides from the upper side 40 of the ridge portion 4. The bottle wall 20 wraps around to the back side of the protruding portions 41 on both sides of the collar 4 to form a covering margin, and is integrated with the covering margin of the upper side 40. Thus, the covering margin is formed over the entire periphery of the collar portion 4, and the attachment strength becomes extremely large, which is preferable.

  At this time, if the front shape of the collar portion 4 is a trapezoidal shape with a rounded corner in FIG. 2 or a triangular rice ball shape as a whole in FIG. 4, the bottle wall 20 wraps around to the back side of the protruding portions 41 on both sides. A covering allowance is formed, which is integrated with the covering allowance of the upper side 40 and is easy to form the covering allowance over the entire periphery of the collar portion 4.

  In general, the covering margin of the upper side 40 is easy to form and the covering margin of the both side protruding portions 41 tends to be difficult to form, but the large chamfered portion 42 formed on both sides of the upper side reduces the resistance. This is considered to be because it is easy to go around to the back side of both sides 41.

  In addition, if the attachment intensity | strength of the handle main body by the measuring method mentioned later is 25 kgf or more, it can be used practically.

As shown in FIGS. 1 and 2, a 1.8 liter bottle blow molding die is provided with a grip portion 31 and mounting arms 32 and 33 projecting laterally from both upper and lower ends of the grip portion 31, 4 of the upper side 40 the height h ₄₀ is 3.5 mm, protrusion width Ws ₄₁ on both sides protruding portions 41 is 2 mm, made of polypropylene handle body formed a chamfered portion 42 of the curvature radius of 10 mm 3 (example 1) and A polyethylene terephthalate handle 3 (Example 2) was set, and a polyethylene terephthalate prioform weighing 62 g was heated to 107 ° C. and blow-molded. Both a polypropylene handle and a polyethylene terephthalate handle The thinnest part of the bottle wall 21 on the lower side of the lower attachment arm 33 maintains a thickness of 0.25 mm, and no holes are formed at all. Kkubotoru was obtained.

As a result of measuring the mounting strength of the obtained plastic bottle with a handle by the following method,
The attachment strength of the handle of the plastic bottle with a handle using the handle of the present invention is 50 kgf in Example 1 and 50 kgf in Example 2, both of which are practically usable compared to 25 kgf, It was extremely large and excellent.

[Mounting strength]
Using the tensile tester, the bottle body 1 of FIG. 5 was fixed sideways, the center height portion of the grip portion 31 of the handle body 3 was gripped, the tensile strength was measured vertically, and the maximum value was taken as the attachment strength.

(Comparative example)
Blow molding was carried out under the same conditions as in the embodiment except that the handle 3 having a protruding piece 330 formed outward (downward) was used at the tip of the conventional mounting arms 32 and 33 shown in FIG. In the case of the handle 3 made of Comparative Example 1 (Comparative Example 1), no hole was formed in the lower bottle wall 21 of the lower attachment arm 33, but the thinnest part had a thickness of 0.15 mm and was made of polyethylene terephthalate. In the case of the handle body (Comparative Example 2), a hole was formed in the lower bottle wall 21 of the lower attachment arm 33.

  As a result of measuring the mounting strength of the obtained plastic bottle with a handle in the same manner as in Example, Comparative Example 1 was practical with 40 kgf, but Comparative Example 2 had a hole. Not measured.

Fig.1 (a) is a front view which shows an example of the handle body of this invention, FIG.1 (b) is a side view of Fig.1 (a). FIG. 1A is an enlarged front view of the vicinity of the lower attachment arm. It is AA sectional drawing of FIG. It is an enlarged front view of the lower side attachment arm vicinity which shows the other example of the handle body of this invention. It is a partially cutaway side view showing an example of the plastic bottle with a handle of the present invention. It is a partially cutaway side view showing an example of a conventional plastic bottle with a handle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bottle main body 2 Handle attachment recessed part 3 Handle body 4 Gill part 20 Bottle wall 31 Grip part 32 Upper attachment arm 33 Lower attachment arm 40 Upper side 41 Both-side protrusion part 42 Chamfer part 51 Inner board 52 Outer board 53 Center vertical rib

Claims (2)

  In the handle body provided with the grip portion and the mounting arm protruding laterally from both the upper and lower sides of the grip portion, a hook portion that continuously protrudes from the upper side of the tip portion of the lower mounting arm to both side portions is formed. A handle body characterized in that a protrusion is not formed on the lower side of the tip of the lower mounting arm.   A grip provided with a grip and a mounting arm projecting laterally from both upper and lower ends of the grip on the handle mounting recess formed on the side surface of the bottle body, and the tip of the mounting arm is a wall in the handle mounting recess In the plastic bottle with a handle that is embedded so as to be embedded in, a hook portion that continuously protrudes from the upper side of the lower mounting arm to both side portions is formed, and the lower side of the tip portion of the lower mounting arm has a protruding portion. A plastic bottle with a handle, characterized in that it is not formed.

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