JP3096995B2 - Handle for bottle with handle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handle for a bottle with a handle made of synthetic resin.

[0002]

2. Description of the Related Art As a method for producing a bottle with a handle using a synthetic resin such as a polyethylene terephthalate resin, a method described in Japanese Patent Application Laid-Open No. 58-99350 has been proposed. According to this method, a handle portion is separately formed, and an engaging portion formed of a projection, a concave portion, or a hole is formed around a joint portion with the bottle main body. The handle is fixed to the bottle main body by engaging a part of the expanded main body wall portion with the engaging portion fixed to the bottle by utilizing the expansion deformation of the main body wall, that is, the extension deformation. How to

[0003]

However, in the above-mentioned prior art, when the engaging portion formed on the handle is a deep concave portion or the like, the main body which expands during blow molding and engages with the engaging portion. Since the moldability of a part of the wall is inferior, and it is easy for the engaging part of the handle and a part of the main body wall to not fit sufficiently, the strength of assembling the handle to the bottle main body is not sufficient. there were.

Accordingly, the present invention has been made to solve the above-mentioned problems in the prior art, and when a bottle body and a handle are engaged by blow molding, a body wall which engages with the engagement portion of the handle is provided. It is an object of the present invention to improve the moldability of a part and to improve the assembling strength of a handle to a bottle body.

[0005]

Means for solving the above-mentioned problems The present invention solves the above-mentioned technical problem by moving a handle toward a bottle body during blow molding of the bottle body, and inserting an engaging portion provided on the handle into a mold. The handle is used for a method of manufacturing a bottle with a handle to be attached to the bottle body by extruding and engaging the engaging portion of the handle with a part of the main body wall of the bottle body. In other words, a sharpened portion having a substantially triangular cross section is provided on the distal end surface of the integrally provided engaging portion.

In this handle, a plurality of sharpened portions are preferably formed at regular intervals in the longitudinal direction of the engaging portion.

[0007]

When the handle is moved toward the bottle body being blow-molded during the blow molding of the bottle body, and the engaging portion of the handle is pushed out into the mold for molding the bottle body, the engaging portion is opposed to the engaging portion of the handle. The outwardly directed force, which is the blow molding force, and the inwardly directed force from the engaging portion in a direction completely opposite to this, simultaneously act on the main body wall portion, so that the handle The main body wall portion facing the joint portion is locally subjected to a much stronger forming force than the other main body wall portions, and is formed into the final shape.

For this reason, the main body wall portion facing the engaging portion of the handle is molded with high moldability using the engaging portion protruding into the mold as a part of the molding die surface, and is firmly engaged with the engaging portion. The mating bulges are reliably formed.

[0009] Since a sharp portion is provided on the tip end surface of the engaging portion of the handle, when the engaging portion is pushed out into the mold, the engaging portion is formed on the main body wall only by the sharp portion. Contact with the engaging portion, thereby making it possible to reduce the size of the main body wall portion at which the stretching deformation stops due to contact with the engaging portion, thereby achieving the formation of the bulging portion without causing extreme local stretching. Can be.

When a plurality of sharpened portions of the handle are provided, a gap is formed between adjacent sharpened portions, and a part of the main body wall is depressed and meshed with the gap. In addition, the handle is more firmly attached to the bottle main body, and a good assembly without rattling of the handle to the bottle main body can be obtained.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. In the drawings, reference numeral 1 denotes a bottle body made of a thermoplastic synthetic resin, which is preferably made of a material suitable for biaxial stretch blow molding, such as polyethylene terephthalate resin.

Reference numeral 2 denotes a handle, and an engaging portion having a substantially "T" cross section is provided on the front surface of a flat plate-like portion of the gripping frame 2a, which has a substantially rectangular frame shape, on the assembly side with respect to the bottle body 1. A pair of left and right engaging recesses 4 are formed between the gripping frame 2a and the assembled flat plate portion, and a cross section is formed on the front surface of the engaging portion 3. A plurality of isosceles triangular sharp points 5 are protruded at regular intervals in the longitudinal direction. The pointed portion 5 is not divided into a plurality as shown in FIG. 4, but may be integrally formed in a long block shape.

Next, a method of manufacturing a bottle with a handle using the handle 2 will be described with reference to FIGS. The preform for molding the bottle body 1 previously molded by injection molding is heated to a predetermined temperature, and the mold 10 for bottle molding is heated.
Set to a predetermined position in On the other hand, the handle 2 is
Is set in the handle space 11 provided in the above. In this case, the handle 2 is assembled so as to be able to advance and retreat toward the inside of the mold 10 by an appropriate driving means, and the engaging portion 3 is pushed into the mold 10 when moving forward.

Therefore, as shown in FIG. 1, the preform is biaxially stretch blow-molded, and when the main body wall 1a approaches the mold surface of the mold 10, that is, immediately before the end of the blow molding, the handle 2 is moved. It is quickly pushed into the mold 10 from the handle space 11. By pushing the handle 2 into the mold 10, that is, by protruding the engaging portion 3 from the mold surface of the mold 10, the portion of the main body wall 1 a facing the engaging portion 3 is locally attached to the tip of the sharp portion 5. When they are in contact with each other, they are simultaneously subjected to an outward force and an inward force, and are stretched and deformed.

In this case, the main body wall 1a facing the engaging portion 3
The stretch deformation of the portion is such that the local portion in contact with the sharp portion 5 is pushed inward in a state where the inward retreat is prevented by the blow molding force, and the remaining portion is stretched and deformed by this push, and this handle is Since the pushing force by 2 is a mechanical force acting directly, stretching deformation of the remaining portion can be surely achieved.

Further, since only a part of the main body wall 1a facing the engaging portion 3 is brought into contact with the sharp portion 5, the area of the portion that can be extended and deformed can be made large. As a result, good formability can be maintained, so that the bulging portion 1b that has sufficiently penetrated into the engaging concave portion 4 can be formed as shown in FIG.

Further, since a gap is formed between the sharpened portions 5, a part of the main body wall 1a enters into this gap and meshes with each other. It is extremely strong without sticking.

[0018]

Since the present invention has the above-described structure, the following effects can be obtained. Since the portion of the main body wall of the bottle body that engages with the engaging portion of the handle is formed into the final shape by the combined force of the blow molding force and the pushing force of the handle, it must be formed with extremely good formability. Thus, the strength of assembling the handle to the bottle main body can be made extremely strong.

Since the sharpened portion is provided on the front surface of the engaging portion of the handle, the area of the main body wall facing the engaging portion can be extended and deformable, thereby generating a thin portion due to local excessive extension. Without this, good moldability can be obtained.

When the sharp part of the handle is divided into a plurality of parts,
Since a part of the main body wall penetrates between the divided sharpened portions, the force for regulating the position of the handle with respect to the bottle body is increased, and the assembling of the handle with respect to the bottle body is loose. Not good.

[Brief description of the drawings]

FIG. 1 is a plan cross-sectional view of a main part in a state at the time of molding using one embodiment of the present invention.

FIG. 2 is a plan cross-sectional view of a main part, showing a state at the time of completion of blow molding.

FIG. 3 is a semi-longitudinal side view showing the molded bottle.

FIG. 4 is an overall perspective view showing an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1; bottle main body 1a; main body wall 1b; bulging portion 2; handle 2a; gripping frame 3;

Claims (2)

(57) [Claims] When the bottle body (1) is blow-molded, the handle (2)
Is moved in the direction of the bottle body (1), and the engaging portion (3) provided on the handle (2) is pushed out into the mold (10), and the engaging portion is pushed out.
(3) By engaging a part of the body wall (1a) with a part of the main body wall (1a), the handle is used for a method of manufacturing a bottle with a handle to attach the handle (2) to the bottle body (1), and A handle for a bottle with a handle, wherein a sharpened portion (5) having a substantially triangular cross section is provided on the distal end surface of the engaging portion (3) provided integrally with the body (2a). 2. A handle for a bottle with a handle according to claim 1, wherein a plurality of sharp portions (5) are formed at regular intervals in the longitudinal direction of the engaging portion (3).