JP3948658B2 - Synthetic resin housing with handle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, a handle made of synthetic resin with a handle, in particular, a handle made of polyethylene terephthalate resin (hereinafter referred to as PET) with a handle as an insert material is biaxially stretch blow-molded, so that the handle is firmly attached to the handle. The present invention relates to a synthetic resin casing with a large handle that is assembled and fixed.
[0002]
[Prior art]
A synthetic resin case with a handle, which is formed by biaxially stretch-blow-molding a PET case main body, using a handle that has been injection molded in a predetermined shape as an insert material, is known as a large case for convenient handling. However, in order to facilitate the handling of separation and collection at the time of disposal, it is desired that the handle is not made of polyethylene resin or polypropylene resin but is made of the same PET as the bag body.
[0003]
As a conventional technique that meets this demand, the technique disclosed in Japanese Patent Application Laid-Open No. 6-298253 is intended to crystallize the locking part corresponding to the part in contact with the handle main body to a crystallinity of 10% or more. By this, the handle is made of the same PET as the cocoon body, and the handle is made of the same PET as the cocoon body, preventing the rupture of the cocoon body during stretching deformation due to poor sliding between each other. Making it possible.
[0004]
[Problems to be solved by the invention]
However, the above-described prior art requires a dedicated operation for crystallization treatment (generally, thermal crystallization treatment) of the locking portion, which is a specific portion of the handle, and accordingly, a casing is formed. There was a problem that the labor required for the increase.
[0005]
In addition, since the thermal crystallization process for the handle locking portion described above requires accurate thermal control without adversely affecting the adjacent portions, in practice, a highly skilled technical skill is required. There was a problem that it could not be easily implemented.
[0006]
Therefore, the present invention was devised to solve the above-described problems in the prior art, and the technical problem is to reduce the poor sliding between the same PET bag body and the handle. It is an object of the present invention to obtain a PET biaxial stretch blow-molded housing in which a PET handle is firmly assembled and fixed as an insert material only by a normal biaxial stretch blow molding operation.
[0007]
[Means for Solving the Problems]
Among the present invention for solving the above technical problems, the means of the invention according to claim 1 is:
It is a synthetic resin casing with a handle, in which a handle, which is an injection-molded product made of PET, is used as an insert material, a biaxial stretch blow molding of the PET heel body, and the handle is assembled and fixed to the heel body.
A grip plate is integrally provided between the upper and lower ends of a pair of assembled beam pieces arranged in parallel in an upright position, and a fitting protrusion is provided on the front end surface of the assembled beam piece so that a pair is assembled. Engagement ridges are formed on the opposite surface of the beam piece by engraving a large number of fine lateral grooves on the front side, and the assembled beam piece, the fitting protrusion and the engagement protrusion are inserted into the insert portion. And
At the time of biaxial stretch blow molding of the heel body, fine irregularities were densely formed in advance on the surface of the insert part of the handle that contacts the heel body.
It is in.
[0008]
Since the heel body and the handle are both made of PET, the slippage becomes worse due to the affinity between them, and between the heel body being stretched and deformed, and the surface portion of the insert portion of the handle in contact with this, A large contact frictional resistance will be generated.
[0009]
However, since the fine irregularities are densely formed on the entire surface of the insert portion of the handle that contacts the heel body during the stretching deformation, the tip of each convex portion of the concavo-convex portion is caused by the heat of the heel body. Since it softens easily and the slipperiness of the surface of the insert portion improves, the increase in contact frictional resistance due to the affinity between the heel body and the insert insert surface portion is surely suppressed. Strongly achieved.
[0010]
Therefore, in a state where the occurrence of rupture of the heel body during stretching deformation is reliably prevented due to the contact frictional resistance between the heel body and the surface portion of the insert portion of the handle, the PET ridge using the PET handle as an insert material. Biaxial stretch blow molding of the main body is possible.
[0011]
Since the effect of reducing the contact frictional resistance between the main body during stretching deformation and the surface portion of the handle insert portion is exhibited based on the structure of the surface portion of the handle insert portion, the insert portion The handle that has been injection-molded with the structure of the surface part of the material can be used as it is as an insert material, and the bag body can be safely molded simply by molding the bag body using the usual biaxial stretch blow molding technique. At the same time, the handle can be firmly attached to the main body.
[0012]
The fitting projecting piece constituting the insert part is positioned in a piercing manner with respect to the heel body being stretched and deformed, and a large portion is formed between the part contacting the mating projecting piece of the heel body and the part being stretched and deformed. Although a pulling force acts, this pulling force acts substantially uniformly on the entire portion in contact with the fitting protrusion, without concentrating on the local area, due to the sliding action of fine irregularities on the surface of the fitting protrusion. Thus, the tensile force for stretching deformation is concentrated on the local part of the heel body and does not act as a breaking force, and the heel body is stretched more safely.
[0013]
In addition, the engaging ridge constituting the insert portion is located in a dam shape that obstructs the movement of the heel body portion extending and moving in the bulging direction, and hinders the extension movement of the heel body. However, since the fine projections and depressions are densely formed on the surface of the engaging ridge where the main body part in contact with the extending movement comes into contact, the above-described action improves the slidability of the surface of the engaging ridge. As a result, the contact frictional resistance between the engaging ridge and the eaves main body portion extending and moving is reduced, and the elongating and moving portion of the eaves body smoothly goes over the engaging ridge and wraps around.
[0014]
The front side of the engaging ridge, where the extension movement part of the heel body is strongly pressed, not only improves the slipperiness by fine irregularities, but also the contact between the locking ridge and the heel body by a number of fine lateral grooves. By reducing the area and reducing the contact frictional resistance between the two, it is possible to make the overturning operation more smoothly with respect to the engaging ridge of the extending movement portion of the heel body.
[0015]
The invention according to claim 2 is obtained by adding the fact that the surface of the fitting projecting piece is a smooth surface that is rounded off to the invention according to claim 1.
[0016]
In the invention according to claim 2, the concentration of the pulling force on the flange main body part in contact with the fitting protrusion and during the deformation is a smooth surface in which the surface of the fitting protrusion is rounded. Therefore, it will be further relaxed and this will ensure high safety.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
The housing according to the present invention includes a large body (1.0 liter or more) of a biaxially stretched blow molded product made of PET, and an upper half portion of the body 2 having a bottomed cylindrical shape. A handle 10 that is an injection-molded product made of PET, which is assembled and fixed by an insert molding means in a recess 3 formed in a recess at the rear part.
[0018]
The recess 3 of the heel body 1 has a ridge-shaped vertical protrusion 5 that is relatively wide along the vertical direction at the center of the bottom surface 4 of the recess that has an upright flat surface at the center excluding the upper and lower ends. A substantially constant height is formed so as to protrude in the form of a bulge over the entire height range of the recess 3.
[0019]
On the projecting end side of both side surfaces of the vertical protrusion 5, a vertical ridge-shaped bulging side part 6 is provided. An engaging groove 7 is formed between the bottom surface 4 and a concave hole bottom portion 4 near the central portion along the height direction of the bulging side portion 6 is formed with a fitting hole portion 8 having a shape like a hole. Further, the fitting edge portion 9 is formed in a step shape so as to face the engagement groove 7, and the engagement groove 7 including the bulging side portion 6, the fitting hole portion 8, and the fitting edge portion 9 The part with the assembly with respect to the handle 10 of the heel body 1 is constituted.
[0020]
The handle 10 is provided between a pair of upper and lower ends of a vertical plate-like handle plate 11 and a pair of assembled beam pieces 12 each having a straight bar shape with both upper and lower ends curved in parallel. An engaging protrusion 15 is provided in a straight line on the opposing surface, and a fitting protrusion 14 is provided in the center of the front end surface 13 of the assembled beam piece 12.
[0021]
The distal end surface 13 of the beam piece 12 with both sets contacting the central portion of the bottom surface 4 of the recess has a straight flat surface like the central portion of the bottom surface 4 of the concave portion. The assembled beam piece 12 having the mating ridge 15 constitutes an assembled part on the handle 10 side, and the fitting projecting piece 14 constituting the assembled part has a smooth surface whose corners are rounded. By doing so, the contact frictional resistance with the bag main body 1 is made small.
[0022]
On the front side of the engaging ridge 15 curved toward the protruding end, a large number of fine lateral narrow grooves 17 are provided, whereby the front side of the engaging ridge 15 contacts the extending and moving part of the rod main body 1. The area is reduced, and the contact frictional resistance between the flange main body 1 and the engaging protrusion 15 is reduced accordingly.
[0023]
At least pairs with part of the handle 10, i.e. on the surface of the insert portion, in advance, but fine irregularities 16 are densely formed, the unevenness 16, as shown in a reference photograph of FIG. 7, the depth Many fine unevenness | corrugations of about 5-20 micrometers are in the state located densely.
[0024]
Assembly of the handle 10 to the heel body 1 is achieved by biaxially stretch-blow-molding the heel body 1 using the assembled portion of the handle 10 as an insert material. By biaxial stretch blow molding of the heel body 1 using the assembly portion of the handle 10 as an insert material, the assembly portion of the heel body 1, that is, the bulging side portion 6, the engagement groove 7, the fitting hole portion 8, and the engagement The fitting edge portion 9 positioned in a state of facing the mating groove 7 is formed in a form that holds the assembled portion of the handle 10 with almost no gap.
[0025]
Since the biaxial stretch blow molding of the heel body 1 is performed at a molding temperature of 90 to 120 ° C., each convex portion of the fine irregularities 16 formed on the surface of the insert portion of the handle 10 by the heat of the heel body 1. Since the tip portion of the pad is easily softened, the slipperiness of the surface of the insert part is improved, and the increase in contact frictional resistance between the surface of the insert part and the paddle body 1 is suppressed. A safe biaxial stretch blow molding operation can be obtained.
[0026]
【The invention's effect】
Since the present invention has the above-described configuration, the following effects can be obtained.
In the first aspect of the invention, the structure is such that the contact friction with the heel body during stretching deformation is reduced by forming fine irregularities densely on the surface of the insert part of the handle. A PET handle can be used as an insert material for the bag body, which is a biaxially stretched blow molded product made of PET, by simply injection molding without any treatment. It is possible to prevent the occurrence of inconvenience that the molding operation of the casing becomes troublesome.
[0027]
In addition , even if the fitting protrusions constituting the insert portion are positioned in a piercing manner with respect to the eaves main body being stretched and deformed, due to the sliding action of fine irregularities on the surface of the fitting protrusions, The pulling force does not act locally on the stretch deformed portion of the heel body that is in contact with the heel body, thereby making it easier to stretch the heel body.
[0028]
In addition, since the fine protrusions and recesses are densely formed on the surface of the engaging ridge constituting the insert portion, the sliding property is good. You will get over and go around.
[0029]
In addition , the front side of the engaging ridge is not only improved in slipperiness due to fine irregularities, but also the contact area between the locking ridge and the heel body is reduced by a large number of fine lateral grooves, Since the contact frictional resistance is reduced, the operation of getting over the engaging protrusion of the extending movement part of the heel body becomes smoother, thereby forming the main part of the assembly part of the heel body with respect to the handle. It is satisfactorily achieved in a state where a strong assembly can be obtained.
[0030]
In the invention according to claim 2, the concentration of the pulling force on the flange main body part in contact with the fitting protrusion, which is being stretched and deformed, is a smooth surface in which the surface of the fitting protrusion is rounded. Further, since the fine irregularities are formed, it is further relaxed, thereby ensuring high safety of the biaxial stretch blow molding of the heel body.
[Brief description of the drawings]
FIG. 1 is an overall side view showing a first embodiment of the present invention.
FIG. 2 is a main part rear view of the embodiment shown in FIG. 1;
3 is a cross-sectional plan view of the main part of the embodiment shown in FIG.
FIG. 4 is a rear view of the handle used in the embodiment shown in FIG.
FIG. 5 is a front view of the handle used in the embodiment shown in FIG.
6 is a longitudinal side view of the handle used in the embodiment shown in FIG.
FIG. 7 is an enlarged reference photograph in which the insert surface of the handle according to the present invention is enlarged (1,000 times).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1; 壜 body 2; trunk | drum 3; recessed part 4; recessed part bottom face 5; vertical protrusion 6; bulging side part 7; engaging groove 8; engaging hole part 9; engaging edge part 10; 12; Assembly beam piece 13; Tip surface 14; Fitting protrusion 15; Engaging protrusion 16; Concavity and convexity 17;

Claims (2)

Using the handle (10), which is an injection-molded product made of polyethylene terephthalate resin, as an insert material, the cocoon body (1) made of polyethylene terephthalate resin is biaxially stretched and blow molded, and the handle (10) is made into the cocoon body (1). A synthetic resin housing with a handle to be assembled and fixed, wherein the handle (10) is placed between the upper and lower ends of a pair of assembled beam pieces (12) arranged in parallel in an upright position. A fitting protrusion (14) is protruded from the front end surface (13) of the assembled beam piece (12), and a large number of opposed beams of the pair of assembled beam pieces (12) are provided on the front side. An engaging ridge (15) in which a fine lateral narrow groove (17) is engraved is formed to project, and the assembled beam piece (12), the fitting protrusion (14), and the engaging ridge (15 ) and was the insert portion, when biaxial stretch blow molding of the bottle body (1), against the該壜body (1) Wherein the surface of the insert portion of the handle (10), previously, with handle synthetic resin bottle body densely form fine irregularities (16).   The synthetic resin casing with a handle according to claim 1, wherein the surface of the fitting protrusion (14) is rounded and smoothed.

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