JP2001114286A - Plastic bottle having handle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the adhesive strength of a bottle body to a handle in a plastic bottle having the handle in which a handle body is fitted to a side surface of the plastic bottle. SOLUTION: A H-section structure with a level difference comprising upper and lower side plate parts 17 and 18 different in length in the short side and a connection part 19 to connect the upper and lower side plate parts to each other is provided on an upper fitting arm part 12 of the handle body 3, and when the bottle body 2 is blow-molded, the H-shaped section structure with a level difference is surrounded by a wall portion of the bottle body 2, and the adhesive strength of the handle body 3 is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic bottle with a handle having a handle attached to the side of a plastic bottle.

[0002]

2. Description of the Related Art In a plastic bottle of this kind, a handle portion is formed separately from the bottle body, and this is attached to the bottle body by physical fixing means or chemical fixing means. It is common to configure.

[0003] For example, as shown in FIG.
The handle body 50 having the protrusions 2 and 53 is formed by injection molding or the like, and a blow molding mold 70 for a bottle body having a concave portion 71 on the side surface is prepared. And
The grip body 50 is set in the concave portion 71 of the mold 70, and after closing the mold, a pressurized fluid is blown into the heated preform 72 to blow-mold the bottle body 60. A manufacturing method has been adopted in which the attachment arms 52 and 53 of the handle body 50 are wrapped around the meat portion and engaged and integrated.

[0004] When the bottle body 60 and the handle body 50 are engaged and integrated by insert molding as described above, unless the contrivance for enhancing the fastening strength is taken, the handle capacity is increased when the bottle is transported in combination with an increase in the internal capacity. 50 may come off. Therefore, for example, in Japanese Patent Application Laid-Open No. 9-39972, a projection 54 slightly extending in the bottle circumferential direction is formed near the distal end of the upper mounting arm 52 as shown in FIG. The projection 54 is wrapped around the bottle wall at the back of the bottle to increase the engagement strength between the bottle body 60 and the handle 50.

[0005] It is an object of the present invention to increase the engagement strength between a bottle main body and a handle by a structure and a manufacturing method that have not been disclosed hitherto.

[0006]

[Means for Solving the Problems] To solve such problems,
The present invention provides a handle body having a handle mounting recess formed in a side surface of a plastic bottle main body, and having in this recess a grip portion and a mounting arm portion extending from the top and bottom of the grip portion to the rear surface direction. In a plastic bottle with a handle attached such that the tip of the portion is wrapped around the wall at the back of the recess, at least one of the mounting arms is connected to upper and lower side plate portions having different short widths and a connecting portion for connecting them. Is formed, and the structure is configured to be wrapped in the meat portion of the bottle body.

[0007] The plastic bottle with a handle having the above structure is
The handle having the above configuration is set in the molding die of the bottle main body, and the structural portion consisting of the tip of the upper and lower mounting arms and the upper and lower side plate portions and the connecting portion of at least one of the mounting arms is placed in the molding die. After the mold is closed, blow molding is performed to form the bottle body, and at the same time, the part of the mounting arm projecting into the molding die is wrapped by the meat part of the bottle body. it can.

When the plastic bottle with a handle is formed in this manner, the handle body can be vertically moved in the left-right direction as compared with the conventional engagement structure in which only the distal end of the mounting arm is wrapped and engaged. In addition, it is difficult for the handle body to come off from the bottle body, and the handle body can be prevented from rattling.

In the plastic bottle with a handle of the present invention, at least one of the mounting arms is formed of a structure including upper and lower side plates having different short widths and a connecting portion for connecting them. The short width indicates the width in the direction intersecting with the extending direction (longitudinal direction) of the mounting arm, and since the upper and lower plates have different short widths, the short width of either the upper plate or the lower plate. Is also intended to be longer.

[0010]

Next, a preferred embodiment of the present invention will be described with reference to the drawings.

A plastic bottle 1 with a handle according to the present embodiment.
Is composed of a bottle body 2 and a handle 3 as shown in FIG.

The bottle main body 2 is formed by blow molding, and a recess 4 for attaching a handle for mounting the handle 3 is formed on the upper side surface thereof. Handle engaging portions 5 and 6 are formed.

The handle 3 is formed separately from the bottle main body 2 by injection molding. As shown in FIG. 2, the handle 3 is slightly above the upper end of the grip 11 in the horizontal direction on the back side. The mounting arm 12 is extended and formed, while the grip 1
1 is bent in the horizontal direction on the back side to extend and form the lower mounting arm 13, and the inner plate 14 and the outer plate 15 extend from the grip 11 to the upper and lower mounting arms 12, 13. Are connected to each other by a central rib 16 to form a stepped H section structure.

More specifically, as shown in FIGS. 2 and 3, the upper mounting arm 12 of the handle body 3 has a grip extending portion 11a extending from a base end, that is, a grip portion 11 to at least a protruding middle portion thereof. (Upper mounting arm 1 of grip 11
The upper rib 17 connected to the inner plate 14a forming the back surface of the upper part 2) and the lower plate 18 connected to the inner plate 14b forming the abdomen of the handle 3 are connected to the central rib 1.
6 and a connecting portion 19 continuous with the upper plate portion 17.
Is formed longer than the short width of the lower plate portion 18 to form an H-section structure with a step, and further, the upper surface portion 1 of the upper plate portion 17 is formed.
7a, a projecting portion 20 extending upward in the direction intersecting the arm projecting direction is provided at the tip end thereof, and grooves 21, 21 extending from both left and right sides toward the center portion in the projecting direction middle portion.
Is engraved.

As shown in FIG. 2, the lower mounting arm 13 includes an upper plate 22 connected to the inner plate 14b and a lower plate 23 connected to the outer plate 15. The upper plate portion 22 has an H-shaped cross section formed by a continuous connecting portion 24, and a protrusion 2 extending at a tip end thereof in a direction intersecting the arm projecting direction.
5 protrudes upward.

As shown in FIGS. 1 and 4, the handle-equipped plastic bottle 1 made of the above-described members has upper and lower mounting arms 12, 13 on the outer side of the concave portion 4 of the bottle main body 2, and the handle-engaged portions 5, 6. And the handle body 3 is attached and fixed. That is, in the handle engaged portion 5, the inner plate portion 14 a of the grip portion 11 and the upper plate portion 17 of the upper mounting arm portion 12 are separated from the inner plate portion 14 a of the grip portion 11 by the meat portion 31 which forms the upper surface portion of the concave portion 4 and the upper wall portion on the back side. Of the upper mounting arm 12 including the protruding portion 20 while covering the front end of the upper surface 17a of the upper surface 17a in a tight contact state, and wrapping the stepped H-section structure portion of the upper arm mounting 12 of the arm and holding the upper plate portion 17 therebetween. And then they are fixed. In the handle engaged portion 6, the lower end of the lower mounting arm 13 including the projection 25 is formed by the lower portion of the concave portion 4 and the wall portion 33 forming the wall of the H-section structure portion with the lower step on the rear side. The part is covered and wrapped in close contact, and is fixedly secured.

Next, a method of manufacturing the plastic bottle with handle 1 will be described.

As shown in FIG. 5, the mold 40 used in the present manufacturing method includes a body mold 40a which is divided into right and left, a bottom mold 40b which can be pulled out upward, and a neck forming mold (not shown). In the mold closed state, a mold inner surface shape corresponding to the shape of the bottle body 2 is formed.

As shown in FIG. 6A, a recess 41 for attaching a handle is formed in the side surface of the body mold 40a. The upper surface of the concave portion 41 is compared with the conventional concave portion 71a shown in FIG. 6B so that the tip of the upper mounting arm portion 12 and the stepped H-section structure portion are exposed in the mold when performing this. The portion is formed so as to extend along the lower surface (the upper surface in the figure) of the upper mounting arm 12.

When manufacturing the plastic bottle 1 with a handle, the handle 3 previously formed by injection molding is set on the mold surface of the concave portion 41 of the mold 40, and the upper mounting arm 12
, The top, side and side portions are projected into the mold to be exposed.

After that, the mold is closed, the heated preform is inserted into the mold, and this is stretched in the longitudinal direction by a stretching rod, and high-pressure air (blow air) is blown into the preform. The stretched resin is in close contact with the mold surface of the mold 40 to blow-mold the bottle body 2 and, at the same time, in close contact with the surface of the handle body 3 protruding into the mold as described above, so as to extend upward from the inner plate portion 14a of the grip portion 11. Upper surface 1 of upper plate 17 of mounting arm 12
7a, covering the front end of the upper mounting arm portion 12 including the projection 20 by covering the front end portion, and also enclosing the stepped H-section structure portion and holding the upper plate portion 17 therebetween. At the same time, the centrifugal resin is applied to the lower mounting arm 13 including the projection 25.
And the bottle body 2 and the handle body 3 are engaged and integrated.

Thereafter, the blow air is exhausted from the mold 40, and then cooled by injecting a cooling medium. Then, when the mold is opened, the plastic bottle with handle 1 in which the handle body 3 is engaged and integrated with the bottle body 2 can be obtained.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of an example of a plastic bottle with a handle according to one embodiment of the present invention.

FIG. 2 is a perspective view showing an example of a handle constituting the plastic bottle with a handle according to one embodiment of the present invention.

FIG. 3 is a sectional view of the handle of FIG. 2;

4 is a partial cross-sectional perspective view showing the structure of the upper mounting arm portion of the handle inside the plastic bottle with handle of FIG. 1;

FIG. 5 is a cross-sectional view showing a state in which a handle is set in a mold for forming a plastic bottle with a handle.

6 (A) is a longitudinal sectional view of the mold shown in FIG. 5, and FIG. 6 (B) is a longitudinal sectional view of a conventional mold.

FIG. 7 is a cross-sectional view showing a state in a mold at the time of blow molding for explaining a conventional method for manufacturing a plastic bottle with a handle.

FIG. 8 is a perspective view showing an example of a conventional handle for a plastic bottle with a handle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plastic bottle with a handle 2 Bottle main body 3 Handle body 4 Recess for holding a grip 11 Grip part 12 Upper mounting arm 13 Lower mounting arm 17 Upper plate 18 Lower plate 19 Connecting part 20 Projection part 21 Groove part 40 Mold 41 Recess

Claims (1)

[Claims] 1. A handle body having a grip mounting recess formed in a side surface of a plastic bottle main body, and a grip body having a grip portion and a mounting arm portion extending from the upper and lower sides of the grip portion to the rear surface direction. In a plastic bottle with a handle attached such that the tip of an arm is wrapped around a wall at the back of the concave portion, at least one of the attachment arms is connected to upper and lower side plates having different short widths. A plastic bottle with a handle, wherein the plastic bottle is formed with a structure comprising a portion, and the structure is wrapped around a meat portion of the bottle body.