JPH06156502A - Plastic bottle with grip and molding thereof - Google Patents

Abstract

PURPOSE:To stabilize and strengthen attaching of a grip to a bottle body in order prevent the deforming and displacement of the attached part on the bottle body against the grip when loaded. CONSTITUTION:The attached part of a bottle body 1 is composed of fitting grooves and fitting holes 9. The attaching part of a grip 11 is constituted of Fitting beams 13 and fitting protrusions 15. The grip 11 is attached to the bottle body 1 by fitting of the fitting grooves to the fitting protrusions 15 and displacement of the attached part in the weakened direction due to the reflecting deformation between the attached spots of bottle body 1 and the grip 11 is prevented by fitting of the fitting protrusions to the fitting holes 9. A stable fitting of the bottle 1 to the grip 11 can be achieved and retained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biaxially stretch blow molded large synthetic resin bottle with a handle, particularly a synthetic resin with a handle in which a handle and a bottle body which are separately molded are firmly assembled. The present invention relates to a bottle manufacturing method and a molding method thereof.

[0002]

2. Description of the Related Art As a typical prior art of a large synthetic resin bottle body with a handle, which is constructed by assembling a bottle body and a handle, which are separately molded, is disclosed in Japanese Utility Model Laid-Open No. 63-147429. There is a bottle.

In this conventional bottle, a vertically arcuate recess is formed at the mouth of the body of the bottle body, and a fitting protrusion is vertically provided in the center of the recess. The left and right side surfaces of the part are closed at both ends and a long groove is vertically provided in an arc shape to form a frame body as a handle in which a handle is installed between the upper and lower ends of the arc-shaped front frame plate part, and the front of this frame body is formed. Engagement ridges are attached to both left and right sides of the frame plate, and the frame body is forcibly pressed from the rear of the recess to achieve forced overcoming of the engagement ridges on the long groove forming wall, and On the other hand, it is constructed by assembling a frame as a handle so that it cannot be removed.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
Although it is possible to achieve a strong attachment of the handle to the bottle body, a strong work force is required to attach the handle to the bottle body, so special equipment is required to attach the handle to the bottle body. There was a problem that the unit price would be high.

Since the bottle body is a biaxially stretch blow-molded product, its wall thickness is thin. Therefore, when a strong working force acts to attach the handle to the bottle body, this acting force causes the bottle body to move. There is a possibility that an improper deformation such as a buckling deformation may occur, and a defective product may be produced when the handle is attached.

Since the bottle body is a biaxially stretch blow-molded product, its wall thickness is thin, so that elastic bending deformation easily occurs due to the load at the engaging assembly portion with the handle. Due to the bending deformation, the force of engagement between the bottle body and the handle is weakened, and there is a problem that the handle is disassembled from the bottle body.

Further, the holding of the assembled state of the handle with respect to the bottle body is achieved only by fitting the engaging projection to the long groove, and the fitting of the engaging projection to the long groove is achieved by forming the engaging projection with the long groove. Since it is achieved by forcibly overcoming the wall, rattling is likely to occur in the attachment of the handle to the bottle body, which may make the handling of the bottle with the handle unstable. There was a problem.

Furthermore, the bottle main body and the handle are separately molded, and the bottle main body is a biaxially stretch blow molded product, whereas the handle is an injection molded product, and therefore the mutual relationship is maintained. Since there is a large difference in the molding dimensional accuracy of the mating part, it is difficult to make the engagement assembly between the bottle body and the handle free of rattling, and at the same time on the bottle body side which is a biaxially stretch blow molded product. Since the degree of protrusion of the mating portion cannot be made sharp, there is a problem that the engagement of the handle with the bottle body cannot be achieved stably and strongly.

Therefore, the present invention has been invented in order to solve the above-mentioned problems in the prior art, and the occurrence of bending deformation of the engaging assembly portion of the bottle body side with respect to the handle when a load is applied. It is a technical issue to eliminate it, and the purpose is to make the attachment of the handle to the bottle body stable and strong.

[0010]

Means for Solving the Problems The means of the present invention for solving the above technical problem is to provide a vertical protrusion on the bottom surface of a recess depressed in the rear portion of the body, and to arrange both sides of the vertical protrusion. A vertical strip-shaped bulging piece is provided on the surface to form an engaging groove between the bulging piece and the bottom surface of the recess, and a blind hole-shaped fitting hole portion is formed in the bottom surface of the recess near the vertical projection. Having a bottle body that is formed by biaxially stretch blow molding, and has a handle plate integrated between the upper and lower ends of a pair of assembled beam pieces that are arranged in parallel and have a tip end surface that abuts the bottom surface of the recess of the bottle body. And the engaging projections that engage with the engagement grooves of the bottle main body are provided on the opposing surfaces of the two assembled beam pieces, and the fitting projections that fit into the fitting holes of the bottle main body on the tip surface. It has a handle that projects.

It is desirable to provide a plurality of fitting holes in the bottle body and a plurality of fitting protrusions for the handle.

[0012] It is preferable to project a supporting protrusion on the bottom surface of the concave portion of the bottle main body, the supporting protrusion contacting the outer side surfaces of the beam pieces with both sets of the assembled handle. The protruding pieces may be arranged vertically with a space therebetween.

The means of the method of the present invention for solving the above technical problem is to provide a vertical protrusion on the bottom surface of a recess depressed in the rear portion of the body, and form a vertical strip on both sides of the vertical protrusion. A bottle main body in which a bulging piece is provided so that an engaging groove is formed between the bulging piece and the bottom surface of the recess, and a blind hole-shaped fitting hole is formed in the bottom surface of the recess near the vertical projection. A handle plate is integrally provided between the upper and lower ends of a pair of assembled beam pieces arranged in parallel with each other and having a tip end surface that abuts the bottom surface of the concave portion of the bottle body, and the bottle body is provided on the opposing surfaces of both assembled beam pieces. A handle with a handle that has an engaging protrusion that engages with the engaging groove and that has a protruding protrusion that fits in the engaging hole of the bottle It is a method of molding a body, a beam piece with a set of handles, a tip surface of the beam piece with the assembly, an engaging projection piece protruding from the beam piece with the assembly, and a projecting piece on the tip surface. The mating protrusion As asserted material, by biaxial stretch blow molding of the bottle body, molding the engaging groove and the fitting hole of the bottle body, in.

[0014]

[Function] When the handle is attached to the bottle body, the vertical projection provided on the bottom surface of the recess of the bottle body is used. It is achieved and maintained by engaging with the engaging groove in a state of being locked to the piece, holding the same from both sides, and fitting the fitting projecting piece of the handle to the fitting hole of the bottle body.

When the handle is attached to the bottle body, the attachment of the handle to the bottle body is such that the engaging protrusion of the handle engages with the engagement groove of the bottle body, that is, the expansion of the bottle body. The engagement of the engaging projection with the engaging groove is maintained by the engagement of the engaging projection of the handle with the engaging hole of the bottle body. The fitting between the piece and the fitting hole portion prevents the grip from being displaced with respect to the bottle body in a state where the engaging projection is engaged with the engaging groove.

That is, when the handle-side fitting protrusion is fitted into the bottle-body-side fitting hole, the bending deformation of the bottle body, which specifically weakens the engagement of the handle with the bottle body, Prevents the deformation of the bottom surface of the concave portion provided with the vertical protrusion in the direction of narrowing the horizontal width of the vertical protrusion, thereby stably maintaining the engagement between the engagement protrusion and the engagement groove. , Similarly, the bending deformation of the beam pieces with both sets of the handle that weakens the engagement assembly of the handle with the bottle body, specifically, the bending deformation of the beam pieces with both the sets in the direction of expanding the mutual interval occurs. The engagement between the engagement protrusion and the engagement groove is stably maintained by preventing the engagement.

Biaxially stretch-blow molding the bottle body by using the beam piece with both sets of the handle, the tip end surface of the beam piece with the assembly, the engaging projection piece, and the fitting projection piece as insert materials.
The bulging piece, the engaging groove, and the fitting hole, which are the part of the bottle body that engages with the handle, are the beam part with both sets of the handle, the tip surface,
The engaging protrusion and the fitting protrusion are assembled and molded with substantially no space.

Since the attachment of the engaging assembly portion of the bottle body to the handle is achieved by stretch molding of the engaging assembly portion of the bottle body, the portion of the bottle body is locally stretched and deformed. However, there is no rigid and unreasonable elastic deformation. Therefore, when the handle is attached to the bottle body, the bottle body, which is a biaxially stretch blow-molded product, is mechanically deformed such as buckling deformation. Does not occur.

Further, the engaging assembly portion of the bottle body is assembled to the handle by the molding accompanying the biaxial stretching blow molding of the bottle body, so that the assembly of the handle after the molding and the biaxial stretching. It is possible to set the degree of protrusion of the engaging portion to such an extent that a sufficiently strong engaging force can be exerted without considering the release from the blow molding die device.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. The bottle body 1 which is a large-sized (2.5 to 4.0 liters) biaxially stretch blow molded synthetic resin bottle body is
A concave portion 3 which is curved and depressed along the vertical direction is formed in the rear portion of the upper half portion of the body portion 2, and a concave bottom surface 4 of the concave portion 3 is formed.
In the center of the vertical direction, a vertical protrusion 5 having a relatively wide width along the up-down direction is formed so as to bulge over the entire height range of the recess 3 at a substantially constant height.

A vertical projecting strip-shaped bulging piece 6 is provided on both sides of the upper end of the vertical projecting portion 5 on the projecting end side. And a bottom surface 4 of the concave portion, an engaging groove 7 whose upper end is abutting end 8 is formed, and a plurality of (in the illustrated embodiment, in the illustrated embodiment, a plurality of (in the illustrated embodiment,
A total of 6 fitting holes 9 are formed on the left and right, and a pair of grips 11 are attached to the recess bottom surface 4 on the outer side of the fitting holes 9. A support protrusion 10 is provided so as to abut the outer side surface of the beam piece 13. The engagement groove 7 including the bulging piece 6, the fitting hole 9 and the support protrusion 10 engage the bottle body 1 with each other. It constitutes the assembly part.

The supporting projection 10 may be brought into contact with the outer side surfaces of the beam pieces 13 with both sets of the handle 11 assembled to the bottle body 1, and the structure thereof is simply continuous vertical projections. It may be a bulge-like protrusion (see FIG. 1) or a plurality of protrusions that are arranged vertically at intervals (see the left half of FIG. 2).

A handle 11 (see FIGS. 4, 5 and 6), which is an injection-molded product of a relatively hard synthetic resin, is curved along substantially the same curve as the bottom surface 4 of the recess and is arranged in parallel. Between the upper and lower ends of the assembled beam piece 13, a flat plate-like handle plate 12 is integrally installed in a erected manner via a connecting plate 17, and the handle plate 12 is provided.
A large number of recesses for lightening are formed in the.

The tip surface 14 of the assembled beam piece 13 has the same curved surface shape as the bottom surface 4 of the recess, and the fitting projection piece that fits tightly into the fitting hole portion 9 of the bottle body 1 is formed on the tip surface 14. 16 is provided in a projecting manner, and a projection-like engagement projecting piece 15 is provided in a projecting manner from the lower end on the tip side of the opposite side surfaces of the both-assembled beam pieces 13 to the vicinity of the upper end.
The pair of beam members 13 having the front end surface 14, the engaging protrusions 15, and the fitting protrusions 16 form an engaging member-attaching portion on the handle 11 side.

The handle 11 is assembled to the bottle body 1 by using the engaging assembly portion of the handle 11 as an insert material.
This is achieved by biaxially stretch blow molding the bottle body 1. By the biaxial stretch blow molding of the bottle body 1 using the engaging assembly portion of the handle 11 as an insert material, the engaging assembly portion of the bottle body 1 is attached to the engaging assembly of the handle 11 as shown in FIG. It is molded in such a way that it encloses the parts, and is in a state of being engaged with a large degree of engagement with substantially no gap.

As is apparent from FIG. 3, the supporting projection 10 of the bottle body 1 has the assembled beam piece 13 in which the engaging projection piece 15 is engaged with the engaging groove 7 between the vertical projection portion 5. Since it abuts on the outer side surface of the assembled beam piece 13 in a state of being held, deformation deformation displacement of both assembled beam pieces 13 to the outside is prevented, so that the fitting projection piece 16 is fitted into the fitting hole portion 9. The weakening prevention effect of the engagement assembly of the engagement assembly portion of the handle 11 with respect to the engagement assembly portion of the bottle body 1 is strongly reinforced.

Further, by providing the abutting end 8 in the engaging groove 7 of the bottle body 1, the upper end of the engaging projecting piece 15 of the handle 11 abuts against the abutting end 8 to attach the handle 11 to the bottle body 1. Of the engagement assembly of the handle 11 with respect to the engagement assembly portion of the bottle body 1 by fitting the fitting protrusion 16 into the fitting hole portion 9 is prevented. It will strongly reinforce the anti-weakening effect.

[0028]

Since the present invention has the above-mentioned structure, it has the following effects. By engaging the engaging projection of the handle with the engaging groove of the bottle body, the engagement of the handle with the bottle body is achieved, and the engaging projection of the handle is fitted into the fitting hole of the bottle body. Since the engagement between the engagement groove and the engagement projection is stably maintained, the attachment of the handle to the bottle body can be made stable, and the handling of the bottle body with the handle is extremely easy. Can be achieved safely.

By fitting the fitting protrusion of the handle to the fitting hole of the bottle body, the bending of the portion of the bottle body engaging with the engaging assembly with respect to the portion with the engaging assembly of the handle is weakened. Displacement due to deformation and displacement due to flexural deformation in the direction that weakens the engagement assembly of the beam pieces with both grips of the handle are strongly and reliably prevented, and a strong engagement assembly of the handle with the bottle body is provided. Is stably maintained, so that the strong engagement of the handle with the bottle body is firmly and reliably maintained over a long period of time.

Since the fitting projection of the handle has a structure in which the projection is simply provided on the tip end surface of the assembled beam piece, its structure is extremely simple and therefore easy to implement.

When the portion of the handle with which the engaging assembly is assembled is made of an insert material, the assembly of the handle with respect to the bottle body is achieved at the same time when the bottle body is biaxially stretch blow molded, so that the bottle body is a separate molded product. Since there is no possibility that rigid permanent deformation such as buckling deformation or improper deformation will occur at the engagement assembled part of the bottle body due to the engagement assembly of the handle and the handle, the handle is safe for the bottle body. Good engagement assembly can be achieved.

The biaxial stretch blow molding of the bottle main body as an insert for the handle can be carried out by slightly modifying the existing biaxial stretch blow molding apparatus for molding the bottle main body,
Therefore, it is possible to prevent a large increase in cost for implementation.

Since the engaging assembly portion of the bottle body is molded with the engaging assembly portion of the handle as a part of the molding die surface, the engaging assembly portion of the bottle body and the engaging assembly portion of the handle are Can be assembled with substantially no gap, and the engaging assembly portion of the bottle body can have a structure with a strong engaging force, thereby making the engaging assembly of the handle with the bottle body strong and stable. be able to.

[Brief description of drawings]

FIG. 1 is an overall side view of a bottle body according to an embodiment of the present invention, in which a handle is semi-longitudinally cut.

FIG. 2 is an overall rear view of the bottle body of the embodiment shown in FIG. 1 with the left half of the handle removed.

FIG. 3 is an enlarged plan sectional view taken along the line AA in FIG.

4 is an overall rear view of the handle of the embodiment shown in FIG.

5 is an overall side view of the handle shown in FIG.

6 is an overall vertical cross-sectional side view of the handle shown in FIG.

[Explanation of symbols]

 1; Bottle main body 2; Body part 3; Recessed part 4; Recessed part bottom face 5; Vertical protruding part 6; Bulging piece 7; Engagement groove 8; Abutting end 9; Fitting hole part 10; Supporting protruding part 11; Handle plate 13; Beam piece with assembly 14; Tip surface 15; Engagement projection piece 16; Fitting projection piece 17; Connection plate

Claims (6)

[Claims] 1. A vertical projection (5) is provided on a bottom surface (4) of a recess (3) recessed in a rear portion of a body (2), and the vertical projections (5) are longitudinally formed on both side surfaces of the vertical projection (5). A strip-shaped bulging piece (6) is provided so that the bulging piece (6)
An engaging groove (7) is formed between the recess and the bottom surface (4) of the recess, and a blind hole-shaped fitting hole (9) is formed in the recess bottom surface (4) near the vertical protrusion (5). The biaxially stretched blow-molded bottle body (1) and a pair of assembled beam pieces (13) arranged in parallel with each other having a tip end surface (14) contacting the bottom surface (4) of the recess. A handle plate (12) is integrally provided between the ends, and an engaging protrusion (15) that engages with the engaging groove (7) is provided on the facing surface of the paired beam pieces (13).
A fitting protrusion that fits in the fitting hole (9) on the tip surface (14).
A synthetic resin bottle body with a handle (11) having a protruding (16). 2. The synthetic resin bottle with a handle according to claim 1, wherein a plurality of fitting holes (9) and a plurality of fitting projections (16) are provided. 3. The support projection (10), which comes into contact with the outer side surface of the beam pieces (13) with both the assembling handles (11), provided on the bottom surface (4) of the recess so as to project. Bottle body made of synthetic resin with the described handle. 4. A support projection (10) having a vertical ridge shape.
Bottle body made of synthetic resin with handle described in. 5. The synthetic resin bottle bottle with a handle according to claim 3, wherein the supporting protrusion (10) is formed by vertically arranging a plurality of protrusions at intervals. 6. A vertical projection (5) is provided on the bottom surface (4) of the recess (3) recessed in the rear part of the body (2), and the vertical projections (5) are provided on both sides of the vertical projection (5). A strip-shaped bulging piece (6) is provided so that the bulging piece (6)
And an engaging groove (7) between the concave bottom surface (4) and a blind hole-shaped fitting hole (9) at the concave bottom surface (4) near the vertical protrusion (5). In the bottle body (1) where the
The handle plate (12) is integrally provided between the upper and lower ends of a pair of assembled beam pieces (13) having a tip surface (14) abutting against (4) and arranged in parallel, An engaging projection (15) that engages with the engaging groove (7) is provided on the opposite surface of (13), and the tip end surface (14) is fitted into the fitting hole (9). The handle (1
1) is a method of molding a bottle with a handle that is immovably assembled, wherein the assembled beam piece (13), the tip surface (14), the engaging projection piece (15), and the A synthetic resin bottle with a handle for forming the engaging groove (7) and the fitting hole (9) by biaxial stretch blow molding of the bottle body (1) using the fitting protrusion (16) as an insert material. Body shaping method.