JPH06263149A - Plastic vessel with grip - Google Patents

Abstract

PURPOSE:To provide a plastic vessel with a grip, wherein a wall of a body of vessel surrounding an engaging protrusion provided at a mounting leg of a grip member is formed firmly to strengthen the engagement between the body of vessel and the grip member and further the grip member can be surely mounted to a position below a lip part. CONSTITUTION:A grip member 14 molded beforehand is inserted into a blow cavity mold 26 and a preform is formed by blow molding in the mold 26, whereby a plastic vessel with a grip, wherein the member 14 and a body 12 of the vessel are formed into a single body, is formed. In this case, the member 14 is formed from a main body 20 of grip, a pair of mounting legs 22 extending from the opposite ends of the body 20 toward the body 12, and an engaging protrusion 24 comprising an inside protrusion 34 and outside protrusion 32 extending to both sides of the body 12 in the longitudinal direction thereof from the end of each of the legs 22, and the protrusion 24 is formed so as to be inclined toward the interior of the body 12 as the distance from the base of the opposing protrusions 34 increases toward the end thereof.

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.

As this bottle with a handle, Japanese Patent Laid-Open No. 58-58
There is one as shown in Japanese Patent Publication No. 99350.

In this bottle with a handle, the handle member is constructed as a member which is separated and independent from the container body. The handle member has a pair of mounting leg portions extending from both ends of the handle body perpendicularly to the body, and has engaging projections at the tips of the mounting leg portions. By inserting this handle member into the blow cavity mold and blow molding the container body in the blow cavity mold, the wall portion of the container body around the mounting leg portion of the handle body is stretched and expanded toward the mounting leg side. , The engaging projections of the mounting legs are engaged.

[0005]

In the conventional bottle with a handle, the engaging projections formed on the two mounting legs are opposite to the mounting legs in the longitudinal direction of the container body. If it protrudes to the outside, it does not cause much problem, but if it protrudes to the inside that is opposite in the longitudinal direction of the container body, when the container body is blow-molded, the engagement of the opposing inside The wall portions of the container main body located between the protrusions are pulled to the center side between the engagement protrusions, and the engagement protrusions are less likely to wrap around the outside of the container main body. Therefore, there is a problem that the engagement state between the container body and the handle member is weakened, and the handle member is easily disengaged from the container body.

Particularly, in the case of a large-sized bottle of 2 liters or more, from the viewpoint of operability of holding the handle and pouring the content, near the center of gravity of the bottle filled with the content, that is, in the height direction of the container body. It is preferable to provide a handle near the substantially central position, but the wall of the container body during blow molding is
There is a problem in that the handle cannot be provided in the vicinity of the center of gravity of the container main body because the handle portion is less likely to go around the engaging projection portion as it goes downward from the lip portion.

Further, when the bottle becomes large, the weight of the bottle becomes considerable while being filled with the contents, and when the handle body attached to the bottle is grasped and lifted in this state, the center of the handle body bends outward, As a result, the tip side of the mounting leg becomes narrowed, and if the engagement between the wall of the container body and the engaging protrusion is insufficient as described above, the engaging protrusion will come off from the container body. There was a problem that it would end up.

Furthermore, if the engaging projections, particularly the engaging projections located inside the pair of mounting legs, are long and the outer surface corners are angular, the wall portion of the container body will be free. Although it is difficult to wrap around the inner engagement protrusion, there is a problem that it becomes more difficult for the wall to wrap around.

Therefore, an object of the present invention is to ensure that the wall portion of the container main body wraps around the engaging protrusion provided on the mounting leg portion of the handle member, and to firmly engage the container body and the handle member. (EN) Provided is a plastic container with a handle which can be securely attached to a position below the vicinity of the lip portion.

Another object of the present invention is to provide a plastic container with a handle having a sufficient mounting strength even for a large capacity container.

Another object of the present invention is to provide a plastic container with a handle that allows the wall portion of the container body to wrap around the engagement protrusion portion at an inner position where the wall portion does not easily wrap around.

[0012]

A plastic container with a handle according to a first aspect of the present invention is formed by inserting a preformed handle member into a blow cavity mold and blow molding a preform in the blow cavity mold. In the plastic container with a handle, the handle member includes a handle body, a pair of mounting legs extending from both ends of the handle body to the container body side, and a vertical direction of the container body from a tip position of each mounting leg portion. An engaging projection portion formed of an inner projection and an outer projection projecting to both sides in the axial direction, wherein the engaging projection portion is inclined toward the inside of the container main body at least as the inner projections facing each other face from the base end to the tip. It is characterized by being formed.

The plastic container with a handle according to the second aspect of the present invention is characterized in that the pair of mounting leg portions are formed in an inclined state in which they spread out toward the inside of the container body.

Further, in the plastic container with a handle according to the third aspect of the present invention, the inner protrusions of the engaging protrusions, which face each other, have a shorter protruding length than the outer protrusions, and the corners thereof are chamfered. It is characterized by having a cross section.

[0015]

In the first aspect of the present invention having the above-mentioned structure, the handle member is formed in advance, and the handle member is placed in advance in the blow cavity mold. Then, the preform is inserted into the blow cavity, and the preform is blow-molded in the blow cavity to mold the container body, and the container body and the handle member are engaged by the winding of the wall portion of the container body. Let them be integrated.

In this case, at least the opposing inner protrusions of the engaging protrusions formed at the tips of the pair of mounting legs of the handle member are inclined toward the inside of the container body from the base end toward the tip. Even if the wall of the container body is placed between the mounting legs that are pulled to the center side and are less likely to go around the outer surface of the engaging protrusion, the wall of the container body will contact the outer surface of the inner protrusion of the engaging protrusion. It is easy to wrap around, and a reliable engagement state can be obtained.

Further, since the wall portion of the container main body easily wraps around the outer surface of the inner protrusion of the engaging protrusion,
Even when the handle member is to be attached near the center of the body below the lip of the container body, it is possible to obtain a reliable engagement between the container body and the engaging protrusion.

In the second aspect of the invention, since the pair of mounting legs are in a state of expanding toward the inside of the container body, the container body having a large capacity is filled with contents. When the handle member is gripped and the container body is lifted, even if the center part of the handle body bends outward and the tip side of the mounting leg narrows, the inner protrusion of the engaging protrusion may face outward of the container body. Instead, the engagement state with the container body is reliably maintained.

According to the third aspect of the present invention, when the preform is inserted into the blow cavity mold in which the handle member is placed in advance and the blow molding is performed, the inner projections of the engaging projections opposed to each other are compared with the outer projections. Since the protrusion length is short and the corners are chamfered in cross section, the wall of the container body can wrap around the outer surface of the inner protrusion without receiving much resistance. As a result, a more reliable engagement state can be obtained.

[0020]

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

1 to 6 are views showing a plastic container with a handle according to an embodiment of the present invention.

As shown in FIG. 1, a 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 26 (see FIG. 5), and a preform (not shown) is blow-molded in the blow cavity mold 26. And handle member 1
4 and 4 are engaged and integrated.

The container body 12 is injection-molded with a synthetic resin such as polyethylene terephthalate (PET) to form a preform, and the preform is formed into a bottle shape shown in FIG. 1 by biaxial stretching blow molding or the like. It is supposed to be done. Also, the container body 12 is, for example, 5
It is formed as a large bottle with a capacity of liter,
In the case of such a large-capacity bottle, when the contents are filled, it becomes a considerable weight, and when the handle is at an upper position such as the vicinity of the lip portion 16, the center of gravity becomes lower and it is difficult to pour, Body 1 near the center of gravity of the contents-filled state
8 A handle is formed near the center position.

The handle member 14 is, for example, PET or PET.
As shown in FIG. 2, the handle main body 20, a pair of mounting leg portions 22, and an engaging projection portion 24 are formed. The material of the handle member 14 is not limited to the above example, and various synthetic resin materials such as polyethylene (PE) and polypropylene (PP) can be adopted.

The handle body 20 is a body portion 18 of the container body 12.
It is attached near the center along the longitudinal direction, and its outer surface is formed with a curvature along the surface shape near the center of the body portion 18.

The pair of mounting legs 22 extend from the vicinity of both ends of the handle body 20 toward the container body 12 side, and
0 and the container body 12 are connected. In addition, the pair of mounting leg portions 22 is formed in an inclined state in which the mounting leg portions 22 widen toward the inside of the container body 12. Specifically, the mounting leg portion 22 is in a state of being expanded at an inclination angle θ with respect to an axis X orthogonal to the vertical axis of the container body 12. The inclination angle θ is set such that, even when the central portion of the handle body 20 is bent outward due to the weight of the content when the container body 12 filled with the content is lifted by gripping the handle, the mounting leg portion 22 Is set to an angle that is orthogonal to the vertical axis of the container body 12.

The engaging projections 24 are composed of outer projections 32 and inner projections 34 projecting from the tip positions of the mounting legs 22 to both sides of the container body 12 in the longitudinal direction.

Further, in the engaging projection 24, the outer projection 32 and the inner projection 34 are arranged in a straight line, and as the inner projection 34 side goes from the base end to the tip, the container main body 12
Is formed so as to be inclined inward. Specifically, as shown in FIG. 2, the engaging protrusion 24 has an inner protrusion 34 with respect to an axis Y parallel to the vertical axis of the container body 12.
The side is inclined toward the inside of the container body 12 at an angle α.

Therefore, the angle of the inner protrusion 34 with respect to the container body 12 becomes small, and the preform during blow molding easily wraps around the outer surface 34a between the pair of inner protrusions 34, and as a result, the handle member 14 is held. It is possible to dispose it near the center of the body portion 18 apart from the lip portion 16, and it is also possible to sufficiently secure the attachment strength of the handle member 14.

Since the preform wraps around the outer projection 32 of the engaging projection 24 better than that of the inner projection 34, even when the handle member 14 is arranged near the center of the body 18, it wraps around sufficiently. It is possible to secure sufficient mounting strength.

Further, as shown in FIG. 2, the engaging projection portion 24 has a projecting length L set to be shorter than that of the outer projection 32 of the opposing inner projection 34, and at the same time, the container main body 1 thereof.
As shown in FIGS. 3 and 4, the corner portion 36 on the two center side is formed to have a curved chamfered cross section. In this way, by setting the protruding length L of the inner protrusion 34 to be short, the depth of the inner protrusion 34 becomes small, and therefore, the preform easily wraps around the outer surface 34a in the depth direction of the inner protrusion 34, Further, by forming the corner portion 36 of the inner protrusion 34 into a curved chamfered cross-sectional shape, when the inner protrusion 34 wraps around to the outer surface 34a side, the corner portion 36 does not become a wraparound resistance, and the wraparound portion It becomes possible to make it easy.

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.

Then, as shown in FIG. 5, in the blow molding process, the handle member 14 is placed in the blow cavity mold 26.
Is placed in advance, and the blow cavity mold 26 is clamped.
In this case, the insert positioning pin provided in the blow cavity mold 26 is inserted into the positioning hole formed in the handle body 20 to position the handle member 14 in the blow cavity mold 26.

Next, a preform adjusted to a temperature suitable for blow molding is inserted into the blow cavity mold 26, and a blow core mold (not shown) is clamped.

Then, in this state, for example, biaxial stretch blow molding is carried out to mold the container body 12 conforming to the shape of the blow cavity mold 26 and to engage the container body 12 and the handle member 14. In this case, the engaging protrusion 2 formed at the tip of the mounting leg 22 protruding from the handle body 14
4 is inclined toward the inside of the container body 12 at an angle α with respect to an axis Y parallel to the vertical axis of the container body 12, and the angle of the inner projection 34 with respect to the container body 12 is small. The handle member 1 in which the preform during blow molding easily wraps around on the outer side surface 34a between the pair of inner protrusions 34, and as a result, it is difficult for the preform to wrap around
Even in the vicinity of the center of the body portion 18 where 4 is away from the lip portion 16 of the container body 12, the attachment strength of the handle member 14 can be sufficiently ensured.

Further, since the protrusion length L of the inner protrusion 34 is set to be short and the depth of the inner protrusion 34 is made small, the preform can be easily wrapped around the outer surface 34a in the depth direction of the inner protrusion 34. Moreover, by forming the corner portion 36 of the inner protrusion 34 on the center side of the container body 12 into a chamfered cross-sectional shape, the outer surface 34a of the inner protrusion 34 is formed.
The corner portion 36 does not become a wraparound resistance at the time of wraparound to the side, and the wraparound is surely performed.

When the container body 12 is molded and the container body 12 and the handle member 14 are engaged with each other, the plastic container 10 with the handle is taken out to complete the manufacturing.

When the contents are filled in the plastic container 10 with a handle manufactured as described above, and the container body 12 is lifted by grasping the handle and pouring the contents, as shown in FIG. Since it is in the vicinity, the pouring operation can be performed easily.

Further, when the grip body 20 is gripped and lifted, even if the grip body 20 bends due to the weight of the contents and the tip end side of the mounting leg portion 22 narrows, the mounting leg portion 22.
Is in a state of being expanded at an inclination angle θ with respect to an axis X orthogonal to the vertical axis of the container body 12, and the mounting leg portion 22 is narrowed only to such an extent that it is orthogonal to the vertical axis of the container body 12. Therefore, the engagement state between the engagement protrusion 24 and the container body 12 does not become weak.

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

For example, the outer protrusion 32 and the inner protrusion 34 of the engaging protrusion 24 are arranged on a straight line, and the outer protrusion 32 and the inner protrusion 34 are inclined at an angle θ. However, the invention is not limited to this example, and the inner protrusion is not limited to this. It is also possible to tilt only one at an angle θ.

Further, the corner 36 of the inner projection 34 of the engaging projection 24 on the center side of the container body 12 is formed to have a chamfered cross-section, but if chamfered, a certain degree of wraparound of the preform is ensured. The chamfered shape is not limited to a curved surface, and may be a flat surface.

Further, the case where the corner portion 36 of the inner projection 34 of the engaging projection portion 24 is formed into a curved chamfered cross-sectional shape has been described. However, the corner portion of the outer projection is also chamfered into a curved cross section. By forming it into a shape, it is possible to ensure that the preform wraps around the outer protrusion.

Further, the inner protrusion 3 of the engaging protrusion 24 is
The corner portion 36 of No. 4 is formed into a curved chamfered cross-sectional shape so as to ensure the preform wraps around the outer side surface 34a. However, the present invention is not limited to this. Applying mold agent or gripping member 14
It is also possible to deal with it by mixing a release agent into the material.

[0046]

As described above, according to the first aspect of the invention, at least the inner protrusions of the engaging protrusions formed at the tips of the pair of mounting legs of the handle member are opposed to each other in the container main body from the base end toward the tip. The wall of the container body is engaged even between the mounting legs where the wall of the container body is pulled toward the center side and is unlikely to go around to the outer surface of the engaging protrusion because it is inclined toward There is an effect that it is easy to wrap around the inner surface of the projection and the outer surface of the projection, and a reliable engagement state can be obtained.

Further, since the wall portion of the container main body can easily go around along the outer side surface of the inner protrusion of the engaging protrusion, the handle member can be attached near the center of the body portion below the lip portion of the container main body. Even in such a case, there is an effect that a reliable engagement state between the container body and the engagement protrusion can be obtained.

In the second aspect of the invention, since the pair of mounting legs are in a state of expanding toward the inside of the container body,
When the handle member is gripped with the contents filled in a large-capacity container body and the container body is lifted, even if the central part of the handle body bends outward and the mounting leg tip side narrows, it engages There is an effect that the inner protrusion of the protrusion portion does not face to the outside of the container body, and the engaged state with the container body can be reliably maintained.

According to a third aspect of the invention, the inner protrusions of the engaging protrusions, which are opposed to each other, have a shorter protrusion length than the outer protrusions, and the corners have a chamfered cross section. There is an effect that it is possible to go around the outer surface of the inner protrusion without receiving much resistance to the wall portion, and to obtain a more reliable engagement state.

[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 front view showing the handle member of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a side view of the handle member of FIG. 2 seen from the side of the mounting leg.

FIG. 5 is a partially enlarged cross-sectional view showing a state of the container body during blow molding.

FIG. 6 is a partial enlarged cross-sectional view showing a state in which a handle is held and lifted in a state where the container body is filled with contents.

[Explanation of symbols]

 10 Plastic Container with Handle 12 Container Main Body 14 Handle Member 18 Body 20 Handle Main Body 22 Mounting Leg 24 Engagement Protrusion 26 Blow Cavity Mold 32 Outer Protrusion 34 Inner Protrusion 36 Corner

Claims (3)

[Claims] 1. A plastic container with a handle formed by inserting a preformed handle member into a blow cavity mold and blow molding a preform in the blow cavity mold, wherein the handle member comprises a handle body and a handle body. , A pair of mounting legs extending from both ends of the handle body toward the container body, and engagement protrusions composed of an inner protrusion and an outer protrusion projecting from the tip positions of the respective mounting legs to both sides in the longitudinal direction of the container body. The engaging projection is formed so that at least the inner projections facing each other are inclined toward the inside of the container main body from the base end toward the tip, and the plastic container with a handle is provided. 2. The plastic container with a handle according to claim 1, wherein the pair of mounting leg portions are formed in an inclined state in which the mounting leg portions are opened and expanded toward the inside of the container body. 3. The opposing inner protrusion of the engaging protrusion as set forth in claim 1 or 2, wherein the protrusion length is set shorter than that of the outer protrusion, and the corner has a chamfered cross section. A plastic container with a handle.