JP3842496B2 - Plastic bottle with handle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plastic bottle with a handle in which a handle body is attached to a side surface of a plastic bottle.
[0002]
[Prior art and problems to be solved by the invention]
This type of plastic bottle is generally constructed by forming a handle portion separately from the bottle body and attaching it to the bottle body by physical fixing means or chemical fixing means.
[0003]
For example, as shown in FIG. 7, a grip body 50 is formed by injection molding or the like in advance by protruding mounting arm portions 52, 53 from the vicinity of both upper and lower end portions of the grip portion 51 in the back surface direction. A blow molding die 70 for a bottle body provided with a recess 71 is prepared. Then, the handle body 50 is set in the recess 71 of the mold 70, and after the mold is closed, a pressurized fluid is blown into the heated preform 72 and blow molded to form the bottle body 60. At the same time, the bottle body For example, a manufacturing method in which the attachment arm portions 52 and 53 of the handle 50 are wrapped and integrated with 60 meat portions has been adopted.
[0004]
By the way, when the bottle main body 60 and the handle body 50 are engaged and integrated by insert molding as described above, the handle body 50 is detached when the bottle is transported in combination with an increase in the internal capacity unless a device for increasing the engagement strength is used. There is a fear. Therefore, for example, in Japanese Patent Application Laid-Open No. 9-39972, as shown in FIG. 8, a protrusion 54 slightly extending in the circumferential direction of the bottle is formed in the vicinity of the front end portion of the upper mounting arm portion 52, and the concave portion 61 of the bottle body 60 is formed. The protrusion 54 is wrapped with a bottle wall at the back of the bottle to increase the fastening strength between the bottle body 60 and the handle body 50.
[0005]
An object of the present invention is to increase the fastening strength between a bottle body and a handle by a configuration and a manufacturing method that have not been disclosed in the past.
[0006]
[Means for Solving the Problems]
In order to solve this problem, the present invention provides a grip mounting recess (4) formed on the side surface of a plastic bottle body having an opening on the upper side, and an upper mounting extending from the upper and lower sides of the grip portion and the grip portion toward the back surface. A handle body (3) having an arm portion (12) and a lower attachment arm portion (13) is provided, and the tip portion of the upper attachment arm portion (12) and the lower attachment arm portion (13) is provided as the recess portion (4). In the plastic bottle with a handle attached so as to be wrapped by the wall of the lower part of the lower part, the lower attachment arm part (13) has a protrusion part (25) extending on the upper surface part in a direction intersecting with the protruding direction of the arm part And projecting the upper end of the lower mounting arm (13) including the protrusion (25) with the meat portion constituting the recess (4) of the bottle body,
The upper mounting arm portion (12) connects the upper plate portion (17) and the lower plate portion (18) with a connecting portion (19) extending in the protruding direction of the arm portion, and the short side of the upper plate portion (17). The width is made longer than the short width of the lower plate ( 18) and the stepped H cross-section is open at the tip , and the arm protrudes from the upper surface (17a) of the upper plate (17). Protrusions (20) extending in a direction intersecting the direction are projected upward , and two grooves (21) (21) extending from the left and right sides toward the center and not communicating with the center are provided. The upper surface portion (17a) of the upper plate portion (17) is covered with the meat portion constituting the concave portion (4) of the bottle body, and includes the protruding portion (20) and the groove portions (21) (21). Stepped H section structure that wraps the tip of the upper mounting arm (12) and opens the tip A plastic bottle with a handle is proposed, which has a structure in which the meat part is squeezed between the upper plate part (17) and the lower plate part (18) and is fixedly fastened.
[0007]
The plastic bottle with a handle having the above-described configuration is obtained by setting the handle body having the above-described configuration in a molding die of the bottle main body, and a top portion of the top and bottom mounting arm portion, a top and bottom side plate portion and a connecting portion of at least one mounting arm portion, The structure part consisting of is projected into the molding die, and after closing the mold, blow molding is performed to mold the bottle body, and at the same time, the part projecting into the molding die of the mounting arm part is the meat part of the bottle body It can be made to be wrapped.
[0008]
If a plastic bottle with a handle is formed in this way, the handle body can be used in both the vertical and horizontal directions as compared to the conventional engagement structure in which only the tip of the mounting arm is wrapped. It becomes difficult to come off from the main body, and it is possible to eliminate rattling of the handle body.
[0009]
In the plastic bottle with a handle of the present invention, at least one mounting arm portion is formed with a structure composed of upper and lower side plate portions having different short widths and a connecting portion for connecting them, and in this case, the short width and Indicates the width in the direction intersecting with the extending direction (longitudinal direction) of the mounting arm, and since the upper and lower side plate portions have different short widths, the short width of either the upper side plate portion or the lower side plate portion is longer. Including cases.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, preferred embodiments of the present invention will be described with reference to the drawings.
[0011]
As shown in FIG. 1, the plastic bottle 1 with a handle according to the present embodiment includes a bottle body 2 and a handle body 3.
[0012]
The bottle body 2 is formed by blow molding, and a handle mounting recess 4 for mounting the handle body 3 is formed on the upper side surface of the bottle body 2. Handle engaged portions 5 and 6 are formed.
[0013]
The handle body 3 is formed separately from the bottle main body 2 by injection molding, and as shown in FIG. 2, the upper mounting arm portion in the horizontal direction on the back side from the part slightly lowered from the upper end portion of the grip portion 11. 12 is extended and formed, while the lower end of the grip part 11 is bent in the horizontal direction on the back side so that the lower attachment arm part 13 is extended and formed, and from the grip part 11 to the upper and lower attachment arm parts 12 and 13. The inner plate portion 14 and the outer plate portion 15 are connected to each other by a central rib 16 to form a stepped H cross-sectional structure.
[0014]
More specifically, as shown in FIGS. 2 and 3, the upper mounting arm portion 12 of the handle body 3 extends from the proximal end portion, that is, the grip portion 11 to at least the projecting middle portion thereof, with the grip extension portion 11 a (grip portion). 11 on the upper side of the upper mounting arm portion 12) and the lower side plate portion 18 continued to the inner side plate portion 14b constituting the abdomen of the handle body 3. The central rib 16 is connected by a continuous connecting portion 19, and the short width of the upper plate portion 17 is longer than the short width of the lower plate portion 18 to form a stepped H cross-sectional structure, and the upper plate The upper surface portion 17a of the portion 17 is provided with a protruding portion 20 extending upward in the direction intersecting with the protruding direction of the arm portion at the tip portion, and extending from the left and right sides toward the central portion in the protruding direction intermediate portion. Grooves 21 and 21 are engraved.
[0015]
As shown in FIG. 2, the lower mounting arm portion 13 has an upper plate portion 22 that is continuous with the inner plate portion 14 b and a lower plate portion 23 that is continuous with the outer plate portion 15 that is continuous with the central rib 16. It is formed in a cross-sectional H-shaped structure that is connected by a connecting portion 24, and a protruding portion 25 that extends in a direction crossing the protruding direction of the arm portion is provided on the upper surface portion of the upper plate portion 22 so as to protrude upward. It is set up.
[0016]
As shown in FIGS. 1 and 4, the plastic bottle 1 with a handle made of the above members engages the upper and lower attachment arm portions 12 and 13 with the handle engaged portions 5 and 6 outside the concave portion 4 of the bottle body 2. The handle 3 is fixed and fixed. That is, in the handle engaged portion 5, the upper plate portion 17 of the upper mounting arm portion 12 extends from the inner plate portion 14 a of the grip portion 11 at the meat portion 31 constituting the upper surface portion of the concave portion 4 and the upper wall portion of the rear side. Covering the tip of the upper surface 17a of the upper surface 17a in a close contact state, the upper portion of the upper mounting arm portion 12 including the protruding portion 20 is wrapped, and the stepped H cross-sectional structure portion of the upper mounting portion 12 of the arm portion is wrapped so as to sandwich the upper plate portion 17 It is then fixed. Further, in the handle engaged portion 6, the lower end portion of the lower mounting arm portion 13 including the protruding portion 25 is a meat portion 33 that constitutes a lower surface portion of the concave portion 4 and a wall portion of the rear lower stepped H-section structure portion. The part is covered and wrapped in a close contact state and fixed.
[0017]
Next, the manufacturing method of the said plastic bottle 1 with a handle is demonstrated.
[0018]
As shown in FIG. 5, the mold 40 used in this manufacturing method is composed of a barrel mold 40a that is divided into left and right, a bottom mold 40b that can be pulled upward, and a neck forming mold that is not shown, and is in a closed state. The inner surface shape of the mold corresponding to the shape of the bottle body 2 is formed.
[0019]
As shown in FIG. 6A, a concave portion 41 for attaching the handle is dug in the side surface portion of the body mold 40a, and the dug 41a of the concave portion 41 is located on the upper side when the handle body 3 is attached. Compared with the conventional recess 71a of the recess 71 shown in FIG. 6B, the top surface of the recess 41 is on the upper side so that the tip of the mounting arm 12 and the stepped H-section structure portion are exposed in the mold. It is formed to the extent along the lower surface (upper surface in the figure) of the mounting arm portion 12.
[0020]
At the time of manufacturing the plastic bottle 1 with a handle, the handle body 3 previously formed by injection molding is set on the mold surface of the concave portion 41 of the mold 40, and the tip portion, the upper surface portion and the side surface portion of the upper mounting arm portion 12 are placed in the mold. To be exposed.
[0021]
Thereafter, the mold is closed, the heated preform is inserted into the mold, and this is stretched in the longitudinal direction with 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 and blow-molds the bottle body 2, and at the same time, is in close contact with the surface of the handle body 3 protruding into the mold as described above, and from the inner plate portion 14 a of the grip portion 11 to the upper side. Covering the tip of the upper surface 17a of the upper plate portion 17 of the mounting arm portion 12 and wrapping the tip portion of the upper mounting arm portion 12 including the protruding portion 20, the upper plate portion 17 is also wrapped by wrapping the stepped H cross-section structure portion. Hold it. At the same time, the centrifugal resin wraps around the tip of the lower mounting arm 13 including the protrusion 25, and the bottle body 2 and the handle body 3 are engaged and integrated.
[0022]
Thereafter, blow air is exhausted from the mold 40, and then a cooling medium is injected to cool. When the mold is opened, the plastic bottle 1 with a handle 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 side view of a partially cutaway sectional view of an example of a plastic bottle with a handle according to an embodiment of the present invention.
FIG. 2 is a perspective view showing an example of a handle constituting a plastic bottle with a handle according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view of the handle of FIG. 2;
4 is a partial cross-sectional perspective view showing the structure of the upper attachment arm portion of the handle inside the plastic bottle with the handle of FIG. 1. FIG.
FIG. 5 is a sectional view showing a state in which a handle is set in a mold for forming a plastic bottle with a handle.
6A is a longitudinal sectional view of the mold shown in FIG. 5, and FIG. 6B 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 in order to explain a conventional method for producing a plastic bottle with a handle.
FIG. 8 is a perspective view showing an example of a handle for a conventional plastic bottle with a handle.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Plastic bottle with a handle 2 Bottle body 3 Handle body 4 Handle attachment recess 11 Grip portion 12 Upper attachment arm portion 13 Lower attachment arm portion 17 Upper plate 18 Lower plate 19 Connection portion 20 Projection portion 21 Groove portion 40 Mold 41 Concavity

Claims (1)

A grip mounting recess (4) is formed on the side surface of the plastic bottle body having an opening on the upper side, and a gripping portion, an upper mounting arm portion (12) extending from the upper and lower sides of the gripping portion toward the back surface, and a lower mounting A grip body (3) having an arm portion (13) is wrapped around the front portion of the upper mounting arm portion (12) and the lower mounting arm portion (13) with the wall of the flange portion of the concave portion (4). In a plastic bottle with a handle that is
The lower mounting arm (13) has a protruding portion (25) extending in a direction intersecting the protruding direction of the arm on the upper surface of the lower mounting arm (13), and is a meat portion constituting the recess (4) of the bottle body. Enclose and fix the tip of the lower mounting arm (13) including the protrusion (25),
The upper mounting arm portion (12) connects the upper plate portion (17) and the lower plate portion (18) with a connecting portion (19) extending in the protruding direction of the arm portion, and the short side of the upper plate portion (17). The width is made longer than the short width of the lower plate ( 18) and the stepped H cross-section is open at the tip , and the arm protrudes from the upper surface (17a) of the upper plate (17). Protrusions (20) extending in a direction intersecting the direction are projected upward , and two grooves (21) (21) extending from the left and right sides toward the center and not communicating with the center are provided. The upper surface portion (17a) of the upper plate portion (17) is covered with the meat portion constituting the concave portion (4) of the bottle body, and includes the protruding portion (20) and the groove portions (21) (21). Stepped H section structure that wraps the tip of the upper mounting arm (12) and opens the tip A plastic bottle with a handle, characterized in that the meat part is squeezed between the upper plate part (17) and the lower plate part (18), and is fastened and fixed.

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