JPH06263150A - Plastic vessel with grip - Google Patents

Abstract

PURPOSE:To provide a plastic vessel with a girp, wherein a grip member is attached to a body of a vessel, while a sufficient wall thickness is provided at the corner of the body of large capacity having polygonal cross section, and to make it possible to insert a hand easily into the grip, while decrease in the volume of the body is minimized. CONSTITUTION:A grip member 14 having been molded is inserted into a blow cavity mold 16 and a preform is formed by blow molding in the mold 16 to form the member 14 integrally with a body 12 of a vessel. In this case, the body 12 has a polygonal cross section and a recessed section is formed over a region including a corner 26, and the grip member 14 includes a grip body 20 extending nearly parallelly with the axis of the body 12 and mounting legs extending from the longitudinally opposite ends of the body 20 to the center of the body 12 and having on the ends thereof engaging protrusions for engagement with the body 12, and the member 14 is disposed in the recessed section and the body 20 is disposed nearly on the extension lines of the corner 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic container with a handle, and more particularly, with a handle by insert blow molding in which the handle member is placed in advance and the container body is blow molded to integrate the handle member and the container body. Regarding plastic containers.

[0002]

2. Description of the Related Art Plastic containers, especially large bottles,
For example, when molding a bottle with a capacity of 2 liters or more,
It is known to mold a bottle with a handle from the viewpoint of improving its ease of holding.

Conventionally, as a bottle with a handle of this type, there is one shown in FIG.

FIG. 4 is a cross-sectional view of a handle mounting portion of a bottle with a handle, which is composed of a container body 100 having a circular cross section and a handle member 110.
10 is configured as a member independent of the container body 100. The handle member 110 has a pair of mounting leg portions 114 extending vertically from the both ends of the handle body 112 to the handle body 112, and an engaging protrusion not shown at the tip of the mounting leg portion 114. is doing.

Then, the handle member 110 is inserted into a blow cavity mold (not shown), and the container body 10 is inserted.
By blow molding 0 in the blow cavity mold, the wall portion of the container body 100 around the mounting leg portion 114 of the handle body 112 is expanded and expanded toward the mounting leg portion 114 side, and the mounting leg portion 114 is illustrated. It is adapted to be engaged with the engaging protrusion. In this case, the outer surface 116 of the handle body 112 is made to coincide with the outer surface 102 of the container body 100 to prevent the handle member 110 from traveling from the outer surface of the container body 100 and becoming an obstacle.

Further, in recent years, not only the bottle having a circular cross section as described above, but also a bottle having a rectangular cross section has come to be used. Even such a bottle having a rectangular cross section has a capacity of 2%. When the size is larger than liter, it is preferable to use a bottle with a handle like the above-mentioned bottle having a circular cross section.

[0007]

In the conventional bottle with a handle having a circular cross section, when the distance from the center of the container main body 100 to the wall surface of the container main body 100 is always constant, the container main body 100 Even if the handle member 110 is provided at any position in the circumferential direction of the wall surface, the attachment result is the same, but in the case of a bottle having a rectangular cross section, the distance from the center of the container body to the wall surface of the container body is not constant. Inconvenience may occur depending on the mounting position of the member.

For example, as shown in FIG. 5, in the case of a container body 120 having a rectangular cross section, from the center of the container body 120,
The distance to the center of the four sides of the wall is the shortest, and the distance to the corner is the longest. When the handle member 110 is attached to the center of one of the four sides of the wall surface,
The difference between the distance L1 from the center of the container body 120 to the tip of the mounting leg 114 of the handle member 110 and the distance L2 to the corner 122 adjacent to the mounting side of the handle member 110 is large, and the handle member 110 of the container body 120 is large. The thickness of the mounting portion becomes thicker, and the thickness of the corner portion 122 adjacent to the mounting portion becomes thinner, so that a sufficient thickness of the corner portion 122 cannot be ensured.
There was a problem that the strength of No. 2 was reduced.

This is based on the following causes. That is, in the portion where the blow cavity type grip member 110 is inserted, the cavity surface is in a state of protruding toward the center of the blow cavity type and is close to the preform inserted at the center position of the blow cavity type. After the start of blow molding, the preform first contacts the cavity surface of the insert portion of the handle member 110 and is cooled while being thick, and when the blow molding is further continued, the preform is expanded to the corner side of the blow cavity mold, In the corner portion adjacent to the grip member 110 attachment portion, the preform in the uncooled portion that is not in contact with the cavity surface is stretched and expanded in a thin state, and sufficient strength of the corner portion cannot be obtained.

Further, the handle member 1 is provided on one side of the container body 120.
When attaching the container 10, it is necessary to form a recess 122 for inserting a hand on the side of the container body 120 where the handle member 110 is attached. If this recess 124 is minimized as shown by the solid line in FIG. It was difficult to insert the hand. Therefore, as shown by the chain double-dashed line in FIG.
If a large value is taken, the volume of the container body 120 is reduced, and the capacity is greatly reduced. On the contrary,
It may be possible to secure the capacity by increasing the height of the container body 120, but if the height is increased to make the container larger, there is a problem that it is not preferable because the distribution cost increases accordingly.

Therefore, an object of the present invention is to attach a handle member to a container body having a large capacity and a rectangular cross section to ensure sufficient wall thickness at the corners, and to minimize the volume reduction. It is an object of the present invention to provide a plastic container with a handle that allows easy insertion of a hand.

[0012]

A plastic container with a handle according to the present invention is provided with a container body by inserting a preformed handle member into a blow cavity mold and blow molding a preform in the blow cavity mold. In a plastic container with a handle integrally formed with a handle member, the container body has a rectangular cross-sectional contour shape, and a recess is formed in a region including one corner over the attachment range of the handle member. The handle member includes a handle body extending in a direction substantially parallel to the longitudinal axis of the container body, a handle body extending from both longitudinal ends of the handle body toward the center of the container body, and the container body at the tip thereof. And a mounting leg portion having an engaging portion to be engaged, the handle member is disposed in the recess, and the handle body is on a substantially extended line of a corner portion of the container body. It is characterized in that disposed.

[0013]

In the present invention having the above-described structure, the handle member is formed in advance, and this handle member is placed in advance in the blow cavity mold. Then, the preform is inserted into the blow cavity mold, and the preform is blow-molded in the blow cavity mold to form a container body having a rectangular cross section, and the container body and the handle member are connected to the wall of the container body. By engaging the parts, they are engaged and integrated.

In this case, the handle member is inserted into a corner of the blow cavity mold. Therefore, the handle member
It is arranged at the position farthest from the preform inserted in the center of the blow cavity mold. as a result,
There is no great difference between the distance from the preform to the cavity surface of the handle member attachment portion and the distance to the center of the two sides adjacent thereto, and after the preform contacts the cavity surface of the handle member attachment portion, the adjacent It is not necessary to stretch the preform so much to the two sides, and it is possible to sufficiently secure the wall thickness of the corner portion of the container body at the contact portion between the adjacent two sides.

In addition, the mounting range of the handle member is 1
By forming a recess in a region that includes two corners, the cross-sectional area is minimized compared to the conventional case where a recess is formed on one side, and the volume is prevented from decreasing to ensure capacity. Is possible. Further, by forming the concave portions at the corners, it becomes possible to easily insert the hand when gripping the handle main body.

[0016]

Embodiments to which the present invention is applied will be described below in detail with reference to the drawings.

1 to 3 are views showing a plastic container with a handle according to an embodiment of the present invention.

As shown in FIG. 1, the plastic container 10 with a handle of this embodiment has a container body 12 and a handle member 14.
And a preformed handle member 14 is inserted into a blow cavity mold 16 (see FIG. 3), and a preform (not shown) is blow-molded in the blow cavity mold 16 to obtain a container body 12 And handle member 1
4 and 4 are engaged and integrated.

The container body 12 is formed by injection molding a synthetic resin such as polyethylene terephthalate (PET) to form a preform, and the preform is biaxially stretch blow molded to obtain a 2 liter as shown in FIG. It is formed into a bottle shape having the above capacity. Also,
As shown in FIG. 2, the container main body 12 is formed such that the contour shape of its cross section is quadrangular. Further, the container body 12 is formed with a recess 36 in a region including one corner over the attachment range of the handle member 14.

The handle member 14 is, for example, PET, PET
Of recycled material, polyethylene (PE) or polypropylene (PP), or recycled materials thereof, and as shown in FIG. 1, the handle body 20 extends in a direction substantially parallel to the longitudinal axis of the container body 12. And a pair of mounting leg portions 22 extending from both longitudinal ends of the handle body 20 toward the center of the container body 12, and engaging protrusions as engaging portions projecting outward from opposite ends of the mounting leg portions 22. Part 2
4 and the engaging protrusion 24 is attached to the container body 12
The wall portions of are engaged and integrated.

As shown in FIG. 2, the handle member 14 has a recess 36 formed at a corner portion 26 of the container body 12 having a quadrangular cross section, and a long axis of the handle body 20 is located in the container body 1.
It is designed to be attached so as to coincide with the vertical axis of 2.

Next, the manufacturing process of the plastic container 10 with a handle of this embodiment will be described.

First, the preform and the handle member 14 for forming the container body 12 are separately molded.

Next, as shown in FIG. 3, in the blow molding process, the handle member 14 is placed in the blow cavity mold 16.
Is placed in advance and the blow cavity mold 16 is clamped.
In this case, the handle member 14 is disposed in the handle member insert portion 30 formed at the corner portion 28 of the blow cavity mold 16. In the blow cavity mold 16, the parting surface 38 is formed on an extension line of a diagonal line of the container body 12.
The corner portion 26 into which the handle member 14 is inserted is arranged so as to face the parting surface 38. The handle member 14 is positioned in the blow mold by a positioning member provided on the handle body 20 and the blow cavity mold 16.

Next, a preform whose temperature is adjusted to a temperature suitable for blow molding is inserted into the center of the blow cavity mold 16 and a blow core mold (not shown) is clamped.

Then, in this state, for example, biaxial stretch blow molding is performed to mold the container body 12 having a rectangular cross section along the shape of the blow cavity mold 16, and at the same time, the mounting legs of the container body 12 and the handle member 14 are attached. 22 is engaged with the engaging projection 24 provided at the tip.

In this case, between the distance L3 from the center of the blow cavity mold 16 to the cavity surface 32 of the handle member insert portion 30 and the distance L4 to the cavity surface 34 at the two sides adjacent to the cavity surface 32. Even if the preform inserted into the central portion of the blow cavity mold 16 comes into contact with the cavity surface 32 of the handle member insert portion 30 first, there is no significant difference between Since the difference in the distance is small, it reaches the cavity surface 34 before being cooled so much,
The corner portion 36 between the grip member attachment portion and the two sides adjacent thereto does not become thin, and a sufficient thickness can be secured and strength can be maintained.

Further, by forming the concave portion 36 in the region including one corner portion 26 over the attachment range of the handle member 14, the reduction of the cross-sectional area is minimized as compared with the conventional case where the concave portion is formed on one side. Therefore, it is possible to prevent the volume from decreasing and ensure the capacity of the container body 12.

Further, by forming the concave portion 36 in the corner portion 26, it becomes possible to easily insert the hand when gripping the handle main body 20.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the gist of the present invention.

For example, in the above embodiment, the case where the handle member is attached to the container body having a quadrangular cross section has been described, but the present invention is not limited to this example, and the handle member is attached to the container body having a triangular cross section or a pentagon or more. It is also applicable in some cases.

Further, the pair of mounting legs 2 of the handle member 14
Although the engaging protrusions 24 as the engaging portions are formed on both of the two, the present invention is not limited to this example, the upper engaging portion is formed in a ring shape, and this ring-shaped engaging portion is formed. You may make it engage with the lower lip position of the container body.

[0033]

As described above, according to the present invention, since the handle member is attached by being inserted into the corner portion of the container body having a rectangular cross section by blow molding, the handle member can be attached to one side of the container body. In comparison, there is no significant difference between the distance from the preform inserted in the center of the blow cavity mold to the cavity surface of the handle member attachment part and the distance to the two sides adjacent to it, and the handle member attachment After the preform contacts the cavity surface of the part,
It is not necessary to extend the preform so much to the two adjacent sides, and there is an effect that the wall thickness of the corner portion of the container main body at the contact portion of the adjacent two sides can be sufficiently secured and the strength of the corner portion can be secured.

Further, it is 1 over the attachment range of the handle member.
By forming a recess in a region that includes two corners, the cross-sectional area is minimized compared to the conventional case where a recess is formed on one side, and the volume is prevented from decreasing to ensure capacity. There is an effect that can be.

Further, by forming recesses at the corners,
There is an effect that the hand can be easily inserted when gripping the handle body.

[Brief description of drawings]

FIG. 1 is a front view showing a plastic container with a handle according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a handle member mounting portion in the plastic container with a handle of FIG.

FIG. 3 is a cross-sectional view of the plastic container with a handle shown in FIG. 1 during blow molding.

FIG. 4 is a cross-sectional view of a conventional plastic container with a handle.

FIG. 5 is a horizontal cross-sectional view showing a state where a handle member is attached to one side of a container body having a rectangular cross-section.

[Explanation of symbols]

 10 Plastic Container with Handle 12 Container Body 14 Handle Member 16 Blow Cavity Type 20 Handle Body 26 Corner of Container Body 36 Recess

Claims (1)

[Claims] 1. A plastic container with a handle in which a preformed handle member is inserted into a blow cavity mold, and a preform is blow molded in the blow cavity mold to integrally form a container body and a handle member. The container body has a rectangular cross-sectional outline shape, and a recess is formed in a region including one corner over the attachment range of the handle member, and the handle member is substantially parallel to the vertical axis of the container body. A handle main body extending in the direction, and a mounting leg portion extending from both longitudinal ends of the handle main body toward the center of the container main body and having at its tip end an engaging portion that engages with the container main body. A plastic container with a handle, characterized in that the handle member is disposed in the recess and the handle body is disposed on a substantially extended line of a corner portion of the container body.