JPH02219747A - Plastic blow bottle with handle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a plastic blow bottle in which a handle separate from the bottle body is attached.

(Prior Art) Plastic blow bottles become inconvenient to handle as they become larger, so bottles with integrally molded handles are used for detergents and the like. However, for bottles made of polyester resin such as polyethylene terephthalate, it is difficult to integrally mold the handle with the bottle body.
As shown in the front view in the figure, a bottle has been proposed in which a handle attachment recess 2 is formed above the bottle body 1, and a separate handle 3 is attached to the recess 2 with its upper and lower ends fixed.

(Problems to be Solved by the Invention) However, in the above conventional bottle, the wall surface of the recess is recessed inward, resulting in an asymmetrical shape of the bottle as a whole, and the bottle is stretched eccentrically during blow molding. Part 21
The bottle is stretched greatly and its wall thickness becomes thinner, causing it to deform due to being unable to withstand the stress from the handle during use, and due to an imbalance in wall thickness with other parts, the entire bottle may become unstable due to heat, internal pressure, external force, etc. There is the problem that it is easily deformed, tilted or the concave part is distorted, creating a gap at the handle attachment part.

(Means for Solving the Problems) The present invention attempts to solve the above problems by forming a circumferential concave rib near the lower end of the concave part and devising the attachment part of the handle. The explanation will be based on.

Fig. 1 is a partially cutaway front view showing an example of a plastic blow bottle with a handle of the present invention, Fig. 2 is a perspective view showing an example of the handle, and Fig. 3 is a conventional plastic blow bottle with a handle. It is a front view showing an example.

The present invention provides a plastic blow bottle in which, as shown in FIGS. 1 and 2, a recess 2 for attaching a handle is formed in the upper side surface of a bottle body 1, and a handle 3 is attached in the recess. Continuously or directly below the recess 2, a circumferential recessed rib 4 is formed, and the protrusion 35 of the handle 3 is embedded at the same height as or above the recessed rib 4, and the protrusion 35 of the handle 3 is embedded under the handle 3. This is a plastic blow bottle with a handle, in which a jaw-like protrusion 36 extending downward from the outside is pressed against the outer surface of the body below the concave rib 4.

A recess 2 for attaching a handle is formed in the upper side surface of the bottle body 1. A circumferential concave rib 4 is formed continuously at the lower end of the concave portion 2 or directly below the concave portion. By forming the concave rib 4 in the circumferential direction, during blow molding,
It provides a well-balanced resistance effect below the handle attachment recess 2 and prevents the lower end of the recess from becoming thinner. That is, a circumferential protrusion corresponding to this concave rib 4 is formed on the blow molding mold, but the bottle being blow-molded comes into contact with this protrusion, and due to the resistance, it becomes more difficult than the concave rib 4. The lower part is stretched relatively uniformly despite the asymmetrical shape of the upper part of the bottle, and the lower part of the recess can be prevented from being excessively stretched. It is preferable that the concave rib 4 has a depth of 2 to 5 mm and a width of 3 to 15 mm, since the above effect is remarkable.

In the example shown in FIG. 1, the concave rib 4 is provided continuously at the lower end of the concave portion 2. This is particularly preferable in terms of strength, since it not only prevents the lower end of the recess 2 from becoming thinner, but also creates a balanced shape in which the recessed rib 4 continues from the lower end of the recess 2 and surrounds the bottle body 1.

Further, the concave rib 4 may be formed independently of the concave portion 2 and immediately below the concave portion 2 over the entire circumference.If the distance from the bottom end of the concave portion 2 to the top end of the concave rib 4 is close to 15 mm or less, the thinning described above may occur. It is preferable because of its great prevention effect.

Further, as shown in FIG. 2, the handle 3 is composed of a grip portion 31 and fitting portions 32 and 33 projecting laterally from both ends of the grip portion 31, and has an approximately U-shape as a whole. At the tips of the fitting parts 32 and 33, protrusions 34 and 35 rising upward and downward are provided. In this example, two protrusions on the left and right sides are provided so that they are easy to bite into when fitted into the recess 2 of the bottle.
It is also designed to prevent the handle from wobbling.

At this time, the protrusion 35 below the handle 3 is embedded at the same height as the concave rib 4 or slightly above it. Concave rib 4
The area below the rib 4 is uniformly stretched and thin, so it is not suitable for embedding the protrusion 35, but the concave rib 4 and above it are thick and can sufficiently fix the protrusion 35. . Furthermore, a jaw-like protrusion 3 extending downward outwardly under the handle 3
6 is formed, and since the inner surface of this jaw-like protrusion 36 is pressed against the thinnest part below the concave rib on the outer surface of the bottle, the area of the pressed part is widened and stress is dispersed.
The strong external force applied to the handle 3 is concentrated on the thin interior and does not cause damage.Although not shown, the width of the jaw-like protrusion 36 may be widened laterally.

When this handle 3 is attached to the bottle body, as shown in FIG.
In this case, the protrusions 34 and 35 of the handle 3 are embedded in the bottle wall.

The deepest part is thicker and easier to mold, so the protrusions can be reliably embedded. Although this buried portion becomes a resistance during blow molding and causes eccentricity, the adverse effect is small due to the effect of preventing thinning of the concave ribs.

In order to manufacture such a bottle, for example, the handle 3 is set in advance in a blow-molding mold for the bottle, and the bottle is blow-molded so that the locking part of the handle is wrapped around the bottle wall surface. good.

In a normal bottle, the depth of the recess 2 is preferably about 1/4 to 1/3 of the diameter of the upper part of the bottle body 1, and the handle 3 only needs to be separate from the bottle body. For example, injection molded plastics such as polyethylene and polypropylene are used.

It is best to make the outer surface of the handle 3 almost flush with the outer surface of the bottle body 1 so as not to take up space for storage and transportation.Therefore, when the handle 3 is attached, the recess 2 is formed so that the handle 3 and the recess 2 are flush with each other. It is preferable that the space formed between them be large enough to fit a finger.

(Effects of the Invention) As described above, the plastic blow bottle with handle of the present invention is a plastic blow bottle in which a recess 2 for attaching the handle is formed in the upper side of the bottle body 1, and a handle 3 is installed in the recess. , Since a circumferential concave rib 4 is formed continuously to the lower end of the concave part 2 or directly below the concave part 2, the degree of elongation, shape, etc. of the upper side surface caused by the concave part for attaching the handle to the bottle is reduced. The concave ribs in the circumferential direction prevent the bottle from becoming irregularly deformed due to heat, external force, internal pressure, etc.
It is possible to prevent a gap from forming between the handle attachment part and the bottle.

Furthermore, the protrusion 35 below the handle is embedded at the same height as or above the concave rib 4, and the brim-shaped protrusion 36 extending downward from the outside of the bottom of the handle is pressed against the outer surface of the body below the concave rib, so that it is fixed. This has the effect of making the process more reliable and preventing the pressure welding part from being damaged.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an example of a plastic blow bottle with a handle of the present invention, Fig. 2 is a perspective view showing an example of the handle, and Fig. 3 is a conventional plastic blow bottle with a handle. It is a front view showing an example. 1... Bottle body 2... Concavity 3...
... Handle 4 ... Concave rib 35 ... Protrusion 36 ... Flange-like protrusion amount 1 Figure

Claims (1)

[Claims] There is a recess (2) on the upper side of the bottle body (1) for attaching the handle.
In the plastic blow bottle, a handle (3) is attached in the recess, and a circumferential recessed rib (4) is provided continuously to the lower end of the recess (2) or directly below the recess (2). ), the protrusion (35) of the handle (3) is embedded at the same height as or above the concave rib (4), and the jaw-like protrusion extends downward from the lower outer side of the handle (3). A plastic blow bottle with a handle made by pressing (36) onto the outer surface of the body below the concave rib (4).