WO2000015508A1

WO2000015508A1 - Synthetic resin vessel and manufacturing method thereof

Info

Publication number: WO2000015508A1
Application number: PCT/JP1999/004702
Authority: WO
Inventors: Kohei Satoh
Original assignee: Iris Ohyama, Inc.
Priority date: 1998-09-10
Filing date: 1999-08-31
Publication date: 2000-03-23

Abstract

A synthetic resin vessel comprising a vessel main body (3), an annular flange (5) formed around the peripheral edge of the upper end opening (3a) of the body (3) and a hollow (9e) formed inside the flange (5) for increasing the apparent thickness of the flange (5), wherein the flange (5) comprises an annular base (7) formed integrally with the body (3) and an annular upper end (9) fitted over the upper end of the annular base (7), with the hollow (9e) formed inside the upper end (9), whereby making it possible to mass-produce the vessel at low costs due to a divided and easy-to-form construction of the flange (5).

Description

Specified damage Synthetic resin container and manufacturing method

The present invention provides a flower container (flowerpot, vase, etc.) for mainly cultivating plants (flowers) for appreciation, a flowerpot cover, and a umbrella with a main purpose of improving the beauty of the flowerpot. Containers such as umbrella stands, buckets for drawing water, and pots and bottles for storing water, which are often manufactured originally by unglazing (hereinafter collectively referred to as "flower containers, etc.") More specifically, the present invention relates to a synthetic resin container having a solid feeling of unglazed style and a method for producing the same.

Background art

Originally, flower containers were originally unglazed containers or ceramics, but instead of such traditional materials, flower containers made of synthetic resin have been widely accepted in the market. Taking a flower container as an example, a flower container made of synthetic resin (hereinafter, a flower container made of synthetic resin is simply referred to as a “flower container”) is lighter in weight than a container made of the above-mentioned traditional materials, and can be dropped. It has the characteristics that it does not break easily, can be freely shaped and colored, and can be mass-produced. However, even a flower container with such characteristics is not without its defects. The drawback of the flower container is that it does not have the solid feeling (thickness) of unglazed flower pots and ceramic vases. Flower containers are the only force that helps flowers, and the decorative role of flower containers when decorating flowers cannot be ignored. It is no exaggeration to say that the goodness of a flower container directly affects the goodness of a flower. Recognizing that it is one of the factors that determine the quality of a flower container, the flower container Various attempts have been made to give a feeling.

First, a possible method is to increase the thickness of the flower container to create a dignified feeling similar to that of a traditional container. According to this method, a container having the same thickness as that of an unglazed flower pot or a ceramic vase can be manufactured. However, considering a case where a flower container with a large thickness is manufactured by, for example, injection molding, the molded product is deformed (thickened, etc.) only by the large thickness and cooled to the core of the molded product. It takes time. Deformation of the molded product produces defective products, and the slow cooling time degrades mass productivity. Either is not preferable because it increases the product cost.

Therefore, the method used was to configure the flower container into the shape shown in Fig. 12. That is, a flower container (hereinafter referred to as a “conventional flower container”) 100 is composed of a container body 501 and an annular jaw 5 formed on the periphery of the upper end opening 503 of the container body 501. And a hollow space 507 is formed inside the annular jaw 505. The hollow portion 507 has a function of giving a thickness to the annular jaw portion 505 to create a solid feeling. The conventional flower container 500 is generally manufactured not by injection molding but by rotational molding because the vicinity of the hollow portion 507 is undercut. Rotational molding, in which a powdered material sealed in a mold is heated and melted and a resin layer is formed on the inner surface of the mold by rotating the mold, can produce a molded article having a complicated appearance. There are advantages such as relatively inexpensive molds, etc. Force molding takes time and labor, and is not suitable for mass production in a short time. Without mass production, product costs increase. This is the first problem of the conventional flower container 500.

In addition, since the surface of unglazed flower containers is generally hand-processed, patterns carved on this surface can be distorted in shape that can only be made by hand, The roughness of the shaved surface, variations in dimensions, and ambiguity of angles, etc., also depend on the tastes of the viewer, but such hand-made feeling (hand-made feeling) also contributes to the solid feeling of the flower container. , I can say. Hand-processed patterns can of course be analyzed geometrically, but are very complicated due to their variability and ambiguity. For this reason, it is not impossible to design a complicated pattern with a feeling of handmade by using a computer etc., but it is not always easy considering the huge amount of data for specifying the shape. Absent. The inventors thought that the only way to give a flower container the feeling of handmade was to provide handmade patterns. By forming a handmade pattern on a flower container made of synthetic resin or the like, the solid feeling of the flower container or the like is brought out. This is the second problem to be solved by the present invention. Disclosure of the invention

In order to solve the first problem, the inventors focused on a method in which the annular jaw 505 of the conventional flower container 500 was divided so as to be easily formed, and both were fitted by a fitting structure. did. This method does not impair the solid feeling of the flower container and does not require the use of inefficient molding methods such as rotational molding. Furthermore, the inventor also considered that a solid feeling can be more effectively produced by making the joint of the annular jaw 505 completed by fitting as inconspicuous as possible.

Furthermore, the inventors who have repeatedly made prototypes in order to solve the second problem have adopted a method of machining a mold by electric discharge machining using graphite (graphite) or the like as an electrode, and manually work this graph item. In this manner, a flower container or the like, which is a molded product of the mold, has a handmade feeling. The details of the above means will be explained again in the section. In addition, the interpretation of the terms and the like described in various places in the section “Means for solving the problem” is acceptable due to its nature. The present invention is applied to any of the claims as far as possible.

A container made of a synthetic resin according to the first invention (hereinafter, referred to as a “first container”) includes: a container body; an annular jaw formed on a periphery of an upper end opening of the container body; In addition, it is basically the same as the conventional synthetic resin container described above in that it has a hollow portion formed to increase the external thickness of the annular jaw portion. The first container is characterized in that the annular jaw comprises: an annular base integrally formed with the container body; and an annular upper end fitted to an upper end of the annular base. The hollow portion is formed inside the annular upper end portion. In this specification, the term “annular” is not limited to a circular shape, but also includes a polygonal shape.

The effects of the first container are as follows. That is, the synthetic resin container having the annular jaw is completed by fitting the annular upper end to the upper end of the annular base integrally formed with the container body. Since the annular upper end has a hollow inside, the external thickness of the annular jaw increases. An increase in the external thickness of the annular jaw increases the solid feeling of the entire flower container. Since the annular upper end is formed separately from the annular base, the man-hour and time required for the molding can be reduced as compared with the rotational molding, so that mass productivity is improved.

In the synthetic resin container according to the second invention (hereinafter referred to as “second container”), the configuration of the second synthetic resin container is limited, and the annular bases each include a first annular protrusion projecting upward. And a second annular projection and a third annular projection, wherein the first annular projection shares an inner wall surface with the container body. That is, the inner wall surface of the first annular protrusion and the inner wall surface of the container main body are formed so as to be flush with each other, and the second annular protrusion is provided with a receiving groove at a predetermined interval on the outer side of the first annular protrusion. The third annular projection is formed outside the second annular projection at a predetermined interval, and the lower end of the annular upper end is sandwiched by the receiving groove (lower end Play between the part and the receiving groove An inner wall plate portion formed in a shape, an outer wall plate portion facing the inner wall plate portion with the hollow portion interposed therebetween, and an upper end connecting portion connecting the upper ends of the inner wall plate portion and the outer wall plate portion. When the lower end of the inner wall plate is inserted into the receiving groove, an annular concealing rib that contacts the upper end of the first annular protrusion is formed on the inner wall surface of the inner wall plate, A retaining structure is formed between an outer wall of the third annular projection and an inner wall of the outer wall plate portion.

The second container has the following effects in addition to the effects of the first container. First, since the first annular projection shares the inner wall surface of the container body, there is no joint between the two. On the other hand, the concealing rib formed on the inner wall surface of the inner wall plate portion comes into contact with the upper end of the first annular projection, thereby at least partially obscuring the upper end. This makes the seam between the hidden rib and the first annular projection less noticeable. The lower end of the inner wall plate is sandwiched by the receiving groove, and the two are fitted by the function of a fitting structure formed between the outer wall of the third annular projection and the inner wall of the outer wall plate. As described above, the annular upper end is fitted to the annular base, and the flower container is completed. The upper end connecting portion constituting the annular upper end portion has an apparent thickness in the annular jaw portion, thereby causing the synthetic resin container to have a profound feeling.

In the synthetic resin container according to the third invention (hereinafter, referred to as “third container”), the configuration of the second container is limited, and the inner wall plate portion is thinner than the outer wall plate portion. On the other hand, the outer wall plate is formed to be thicker than the inner wall plate.

Third container, in addition to the effects of the second container, i.e. _c resulting in following advantages, the wall thickness is different, a difference may appear in the cooling time. The cooling time is longer for thicker walls than for thinner ones. Also, the thicker the wall, the higher the shrinkage during cooling than the thinner. For this reason, cooling of the formed annular upper end is performed by the inner wall plate Done faster than the department. After the inner wall plate is cooled, the outer wall plate contracts and bends from the upper end connecting portion toward the inner wall plate side. Due to this bending, when the annular upper end portion is fitted to the annular base portion, the outer wall plate portion is pressed against the third annular projection, and as a result, the fitting structure between the two is firmly engaged. At the same time, the joint between the two is reduced.

In the synthetic resin container according to the fourth invention (hereinafter, referred to as “fourth container”), the configuration of the third container is limited, and the thickness of the lower end portion of the outer wall plate portion is formed to be tapered. Is a structural feature.

In the fourth container, in addition to the effects of the third container, the lower end of the outer wall plate is formed to have a tapered shape, so that the lower end of the outer wall plate and the annular base are naturally integrated with each other. This has the effect of making the joint between the two inconspicuous.

In the synthetic resin container according to the fifth invention (hereinafter, referred to as “fifth container”), the structure of any one of the first to fourth containers is limited, and the upper end of the annular base is moved to the upper end of the annular base. The fitting is performed before the annular upper end portion is cooled and hardened. The phrase "before cooling and hardening" means that the annular upper end removed from the mold is fitted without deformation to the already cooled and hardened container body, that is, the annular base, and before it is completely cooled and hardened. This is the purpose.

In the fifth container, in addition to the function and effect of any one of the first to fourth containers, cooling and hardening of the annular upper end portion are performed after fitting to the annular base portion. The effect that the gap between them is reduced and the joint becomes inconspicuous is produced.

A container made of a synthetic resin according to the sixth invention (hereinafter, referred to as a “sixth container”) includes: a container body; an annular jaw formed on the periphery of an upper end opening of the container body; In order to increase the apparent thickness of this annular jaw This is basically the same as the conventional synthetic resin container described above in that it has a hollow portion formed in the container. The first container is characterized in that the hollow portion extends from the upper end of the container main body and is formed by folding back to the outside of the upper end opening; It is formed by an annular fitting piece fitted through a fitting structure. The effects of the sixth container are as follows. That is, a hollow portion is formed by fitting the annular folded piece and the annular fitting piece. The engagement between the annular folded piece and the annular fitting piece is performed through a fitting structure, thereby preventing the annular folded piece from coming off. The hollow portion configured as described above gives the annular jaw an apparent thickness, thereby causing the synthetic resin container to exhibit a solid feeling. Increasing the appearance thickness of the annular jaw increases the solid feeling of the whole container. Since the container main body (annular folded piece) and the annular fitting piece are separately configured, the number of man-hours and time required for the molding can be reduced as compared with the rotational molding, so that mass productivity is improved.

A container made of a synthetic resin according to a seventh invention (hereinafter, referred to as a “seventh container”) includes: a container body; an annular jaw formed on a periphery of an upper end opening of the container body; In addition, it is basically the same as the conventional synthetic resin container described above in that it has a hollow portion formed to increase the external thickness of the annular jaw portion. A seventh feature of the container is that the annular jaw comprises: an annular base integrally formed with the container body; and an annular upper end fitted to an upper end of the annular base. Each of the first annular projections includes a first annular projection protruding upward, a second annular projection and a third annular projection, and the first annular projection is formed so as to share an inner wall surface with the container body, The second annular projection is formed outside the first annular projection via a receiving groove at a predetermined interval, and the third annular projection is outside the second annular projection at a predetermined interval. The annular upper end is formed in the receiving groove. An inner wall plate formed in such a shape that a lower end thereof is sandwiched by the inner wall plate, an outer wall plate facing the inner wall plate and the hollow portion, and an upper end of the inner wall plate and the upper end of the outer wall plate. And an annular concealing rib that contacts an upper end of the first annular projection when the lower end of the inner wall plate is inserted into the receiving groove. It is formed on a wall surface, and a fitting structure for retaining is formed between an inner wall of the third annular projection and an inner wall of the outer wall plate portion.

The effects of the seventh container are as follows. That is, since the first annular projection shares the inner wall surface of the container body, there is no joint between the two. On the other hand, the concealing rib formed on the inner wall surface of the inner wall plate portion comes into contact with the upper end of the first annular projection, thereby at least partially obscuring the upper end. This makes the seam between the concealed rib and the first annular projection less noticeable. The lower end of the inner wall plate portion is sandwiched by the receiving groove, and the two are fitted by the function of a fitting structure formed between the outer wall of the third annular projection and the inner wall of the outer wall plate portion. As described above, the annular upper end is fitted to the annular base, and the flower container having the annular jaw on the periphery of the upper end opening is completed. Here, the upper end connecting portion forming the annular upper end portion has an apparent thickness in the annular jaw portion, thereby giving the synthetic resin container a solid feeling. Since the annular upper end has a hollow inside, the external thickness of the annular jaw increases. An increase in the external thickness of the annular jaw increases the solid feeling of the entire flower container. Since the annular upper end is formed separately from the annular base, the man-hour and time required for the molding can be reduced as compared with the rotational molding, so that mass productivity is improved.

A synthetic resin container according to an eighth invention (hereinafter, referred to as an “eighth container J”) includes: a container body; an annular jaw formed on a periphery of an upper end opening of the container body; And a hollow portion formed to increase the external thickness of the annular jaw. It is basically the same as a fat container. The eighth container is characterized in that the hollow portion is formed by extending an upper end of the container main body to be folded back to the outside of the upper end opening, and a fitting for preventing the hollow folded portion from falling off from a region below the annular folded portion. An annular fitting piece fitted through a mating structure, wherein the annular fitting piece has a first annular projection and a second annular projection formed outside the first annular projection at a predetermined interval. Wherein the fitting structure comprises: between the outer wall of the container body and the inner wall of the first annular projection, and between the inner wall of the annular folded piece and the outer wall of the second annular projection. Each is formed.

The effects of the eighth container are as follows. That is, a hollow portion is formed by fitting the annular folded piece and the annular fitting piece. The engagement between the annular folded piece and the annular fitting piece is performed through a fitting structure, thereby preventing the annular folded piece from coming off. The hollow portion configured as described above gives the annular jaw an apparent thickness, thereby giving the synthetic resin container a solid feeling. Increasing the appearance thickness of the annular jaw increases the solid feeling of the whole container. Since the container main body (annular folded piece) and the annular fitting piece are separately configured, the number of man-hours and time required for molding can be reduced as compared with rotational molding, thereby increasing mass productivity.

A synthetic resin container according to a ninth invention (hereinafter, referred to as a “ninth container”) includes: a container main body; an annular jaw formed around an upper end opening of the container main body; In addition, it is basically the same as the conventional synthetic resin container described above in that it has a hollow portion formed to increase the external thickness of the annular jaw portion. The ninth container is characterized in that the hollow portion is formed by extending an upper end of the container main body to be folded back to the outside of the upper end opening, and a fitting for preventing the hollow folded portion from falling off from a region below the annular folded portion. An annular fitting piece fitted through a mating structure, The fitting piece includes: a first annular protrusion; and a second annular protrusion formed outside the first annular protrusion at a predetermined interval, and the fitting structure includes: a container main body outer wall. And the inner wall of the first annular projection and between the outer wall of the annular folded piece and the inner wall of the second annular projection.

The operation and effect of the ninth container produce the same operation and effect as the container of claim 8. That is, the hollow portion is formed by fitting the annular folded piece and the annular fitting piece. The engagement between the annular folded piece and the annular fitting piece is performed via the fitting structure, thereby preventing the annular folded piece from coming off. The hollow portion configured as described above gives the annular jaw an apparent thickness, thereby giving the synthetic resin container a solid feeling. Increasing the appearance thickness of the annular jaw increases the solid feeling of the entire container. Since the container main body (annular folded piece) and the annular fitting piece are separately configured, the number of man-hours and time required for molding can be reduced as compared with rotational molding, thereby increasing mass productivity.

The container made of a synthetic resin according to the tenth aspect of the present invention (hereinafter referred to as “the tenth container”) is limited to the configuration of the container according to any one of claims 1 to 9, and is used for forming the container body. Part or all of the mold is characterized by being processed by electric discharge machining using graphite (carbon, carbon, etc.), which has been partially or entirely processed by hand, as an electrode. The `` part or whole J '' of the mold means that the part related to manual processing is part or all of the entire processing process, and the part related to manual processing and the part related to machining are mixed. This also means that both the case of machining and the case of only the part related to hand processing are included. The term “hand-processing” means to process by hand, and use tools such as chisel or chisel. It is not the purpose of eliminating. The container It goes without saying that not only the main body but also the annular upper end is not prevented from being formed using the mold processed by the above method.

Effect of the container of the ^first 0 is added to the action effects of any container of claims 1 to 9, the container body by indirect mold element hand machining is applied through the graphite mold As a result, patterns engraved by hand on the graphite are reproduced (formed) on the surface of the container body. In other words, since the relationship between the positive pattern and the negative pattern is established between the pattern of the graphite and the pattern engraved on the mold, the positive pattern and the like are reproduced as they are on the surface of the container body molded by this mold. That is. By fitting the annular upper end to the container main body in which the pattern or the like by hand is reproduced (formed) in this way, a synthetic resin container having both a solid feeling and a handmade feeling is completed.

The synthetic resin container according to the eleventh invention (hereinafter, referred to as “the first container”) is a synthetic resin container molded by a mold, and a part or all of the mold is A part or the whole is processed by a discharge process using a hand-processed graphite as an electrode. “The shape and size of the synthetic resin container J are not limited as long as it is made of synthetic resin.

The first effect of the container is that the container body is molded by a mold to which the elements of hand processing are added indirectly via graphite, so that patterns etc. carved into the graphite by hand processing can be obtained. It is reproduced (formed) on the surface of the container body. That is, since the relationship between the positive pattern and the negative pattern is established between the pattern of the graphite and the pattern engraved on the mold, the positive pattern and the like are reproduced as they are on the surface of the container body formed by the mold.

The manufacturing direction of the synthetic resin container according to the twelfth invention (hereinafter referred to as “the twelfth manufacturing method”) is such that irregularities, that is, patterns, are partially or entirely formed by hand work (hand processing) on the graphite. A first step of forming, -12-a second step of transferring the irregularities to a mold by electric discharge machining using phyte as one electrode, and a third step of molding a synthetic resin material with the mold. I do.

As for the effects of the first and second containers, the irregularities formed in the graphite by hand are transferred to the mold by electric discharge machining, so that the pattern of the positive image etc. is reproduced as it is on the surface of the container body molded by this mold Is done.

The method for manufacturing a synthetic resin container according to the thirteenth invention (hereinafter, referred to as a “thirteenth manufacturing method”) includes a container main body, an annular jaw formed on a periphery of an upper end opening of the container main body, A hollow portion formed inside the annular jaw to increase the external thickness of the annular jaw; anda hollow base formed to increase the external thickness of the annular jaw. A first step of molding with a mold, a second step of molding an annular upper end fitted with the annular base having the hollow portion therein, and the annular upper end before the annular upper end cools and hardens. And a third step of fitting the part to the annular base.

According to the thirteenth manufacturing method, the following operation and effect are produced. First, the container body and the annular base are integrally formed, and the annular upper end before cooling and hardening is fitted to the annular base. Waiting for cooling and hardening of the annular upper end, the synthetic resin container is completed when the joint between the annular base and the annular upper end is reduced by the cooling and hardening. By such a process, the joint between the annular upper end portion and the annular base portion can be made inconspicuous, so that the sense of unity between the two can be increased and a solid feeling can be produced.

The method for manufacturing the synthetic resin container according to the fifteenth invention (hereinafter referred to as “fourteenth manufacturing method”) is limited to the thirteenth manufacturing method, and a part or all of the mold is A part or the whole is characterized by being processed by a discharge process using electrodes hand-processed as graphite. The fourteenth manufacturing method has the following functions and effects in addition to the functions and effects of the thirteenth manufacturing method. That is, since the container body is molded by a mold in which the elements of hand processing are added indirectly via graphite, the pattern etc. carved by hand on the graphite is reproduced on the surface of the container body ( It is formed. In other words, the relationship between the positive pattern and the negative pattern is established between the pattern of the graphite and the pattern engraved on the mold, so that the positive pattern and the like are reproduced as they are on the surface of the container body formed by this mold. It is. By fitting the annular upper end to the container body in which the pattern etc. is reproduced (formed) by hand processing in this way, a synthetic resin container having both a solid feeling and a handmade feeling is completed. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a flower container according to this embodiment, FIG. 2 is a partially cutaway view of the flower container of FIG. 1, and FIG. 3 is FIG. Fig. 4 is an exploded view of the flower container, and Fig. 4 is an enlarged sectional view of an annular jaw. FIG. 5 is a schematic configuration diagram of an electric discharge machine, and FIG. 6 is a partially enlarged view showing a first modification of the present embodiment. FIGS. 8 and 9 are partially enlarged views showing a second modified example of the present embodiment. FIGS. 9 and 10 are partially enlarged views showing a third modified example of the present embodiment. FIG. 9 is a partially enlarged view showing a fourth modification of the present embodiment. FIG. 12 is a perspective view showing a conventional synthetic resin container partially cut away. BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention (hereinafter, referred to as “ ] Is explained. Although the present embodiment shows a flower container, it goes without saying that the same configuration and manufacturing method as those of the present embodiment can be applied to all other synthetic resin containers.

As shown in FIG. 1, the flower container 1 is made of, for example, a thermoplastic synthetic resin such as polypropylene, and is formed around the container body 3 and the upper end opening 3a of the container body 3. As shown in FIG. 2, the annular jaw 5 is generally constituted by an annular jaw 5, and the annular jaw 5 is fitted to an annular base 7 integrally formed with the container body 3 and an upper portion 7a of the annular base 7. And an annular upper end 9.

As shown in FIG. 3, the container body 3 is integrally formed by injection molding together with an annular base 7 to be described later, and a lower end 7 b of the annular base 7 is arranged horizontally so that a hand can be hung when carrying the flower container 1. Projecting in the direction. The shape and size of the container body 3 are determined according to the type of flower to be planted, and an unglazed pattern is formed on the outer wall surface 3p of the container body 3 of the present embodiment. It is advisable to give the outer wall 3p a relief such as a flower pattern or a reference pattern or color it to give it a handmade feeling as desired. It is convenient to make a drain hole 3 h at the lower end of the container body 3. In addition, the thickness of the container body 3 is maintained such that it is not easily deformed by the weight of the flower when planted, and at the same time light does not pass when the empty container body 3 is held over the sun. Thickness. The passage of light is also affected by the color of the resin constituting the container body 3, but care should be taken since the passage of light impairs the solid feeling of the flower container 1.

The annular base 7 will be described with reference to FIGS. As described above, the annular base 7 is formed integrally with the container body 3 and forms the lower end of the annular jaw 5. The annular base 7 includes a first annular projection 71 projecting upward, a second annular projection 73 and a third annular projection 75, respectively. The second annular projection 73 is longer than the first annular projection 1, and the third annular projection 75 is longer than the second annular projection 73. The base 7 1 b of the first annular projection 7 1, the base 7 3 b of the second annular projection 73, and the base 75 b of the third annular projection 75 are the upper opening 3 a of the container body 3. They are connected by a bottom 3 e that extends diagonally upward from the periphery. The first annular protrusion 71 shares the inner wall surface with the container body 3, that is, the inner wall surface of the first annular protrusion 71 extends on the extension of the inner wall surface of the container body 3, and both are integrally formed. It is formed so that it becomes. The second annular projection 73 is formed on the outside of the first annular projection 71 via a receiving groove 7g (see FIG. 3) at a predetermined interval, and the third annular projection 75 is formed by the second annular projection 75. It is formed outside the annular projection 73 with a predetermined gap 7k therebetween. The gap 7 k also functions as a bending promoting space for elastically bending the third annular projection 5 toward the upper end opening 3 a when the annular upper end 9 is fitted to the annular base 7. If there is no effect on the bending of the third annular projection 75, it is not necessary to form the gap 7k.

A plurality of connecting ribs 7r, 7r ... connecting the first annular projection 71 and the second annular projection 73 are formed in the receiving groove 7g. A reinforcing relationship is established between the annular projection 71 and the second annular projection 73. Also, a plurality of connecting ribs 7 s, s... Connecting the second annular projection 3 and the third annular projection 75 are formed in the gap 7 k, thereby forming the second annular projection 7. A reinforcing relationship is established between the annular projection 73 and the third annular projection 75.

The third annular projection 75 will be described in detail with reference to FIG. The third annular projection 75 is composed of a projection lower end 75 d occupying almost the lower half and a projection upper end 75 u representing the remaining lower half, and the outer wall surface of the projection lower end is the bottom of the annular base 7. It is integrated with the outer wall of 3e. A step 81 is formed between the lower end 75 d of the protrusion and the upper end 75 u of the protrusion. A plurality of fitting projections 75 p, 75 p... Protruding in the radial direction are formed on the outer wall of the end 75 u at predetermined intervals. As shown in FIG. 4, the fitting convex portion 75p has a triangular longitudinal section. The fitting convex portion 75P constitutes a fitting structure 83 together with a fitting concave portion 95p described later. As shown in FIGS. 3 and 4, the annular upper end portion 9 has a cross-sectional shape in which the letter J of the alphabet is inverted, and an inner wall plate portion 91 constituting a long side portion thereof, An outer wall plate portion 9 3 which forms a short side portion and faces the inner wall plate portion 9 1, and a bent portion thereof, that is, an upper end which forms a portion connecting the upper ends of the inner wall plate portion 9 1 and the outer wall plate portion 9 3 A hollow portion 9 e is formed between the inner wall plate portion 9 1 and the outer wall plate portion 9 3. The outer wall plate portion 93 is formed thicker than the inner wall plate portion 91, and has a cross section similar to a half moon. The semi-lunar shape is used to make the outer wall plate 93 appear to be naturally integrated with the outer wall of the annular base 7 by tapering the outer wall plate 93 toward the lower end. . The lower end portion 9 1b of the inner wall plate portion 9 1 is sandwiched between the first annular projection 71 and the second annular projection 73 when inserted into the receiving groove 7 g formed between the two. It is formed in a shape. The clamping is performed by reducing the play between the receiving groove 7 g and the lower end portion 91 b as much as possible, and combining the annular upper end portion 9 and the annular shape with the function of the fitting structure 83 described later. This is for stabilizing the fitting with the base 7. The notches 91c, 91c ... shown in Fig. 3 are formed by connecting the connecting ribs 7r, 7r ... when the lower end 91b is inserted into the receiving groove 7g. This is so that each connecting rib 7 r does not interfere with the insertion.

The lower end portion 91b is further provided with an annular concealed rib 91r which comes into contact with the upper end portion 71u of the first annular projection 71 when it is inserted into the receiving groove g. Is formed on the inner wall surface. The hidden rib 9 1 r hides the end face of the upper end 7 1 u of the first annular projection 7 1 to make the joint between the two as prominent as possible. Formed so as not to be. For example, this hidden rib 91r is formed like a step formed in the container body 3 so that the joint with the first annular projection 71 is inconspicuous when viewed from the upper end opening 3a side. Then it is even better. As shown in FIG. 4, the mating projections 75 p, 75 p.. Correspondingly, fitting recesses 95 p, 95 p... Are formed. The fitting concave portion 95 p forms a fitting structure 83 together with the fitting convex portion 5 p, and the fitting convex portion 75 p is received to fit the annular upper end 9 to the fitting base 7. It plays a role of retaining when it is. As described above, in this embodiment, the fitting convex portion 75 p is provided on the upper end portion 75 u of the third annular projection 75, and the fitting concave portion 95 p is provided on the inner wall of the outer wall plate portion 93. However, the fitting recess may be formed in the former, and the fitting protrusion may be formed in the latter.

As shown in FIG. 3, a plurality of connecting ribs 9 r, 9 r... Are formed between the inner wall plate portion 91 and the outer wall plate portion 93, and each connecting rib 9 r has a cutout 9. c is formed. The notch 9 c prevents the projection upper end 75 u from shifting toward the upper end opening 3 a after the fitting structure 83 is fitted by sandwiching the projection upper end 75 u of the third annular projection 75. To help the function of the mating structure. If the annular upper end 9 is polygonal, it is completely cooled and hardened, for example, by changing the thickness of the corner portions and other portions in consideration of the shrinkage ratio due to cooling and hardening after molding. It is preferable that the shape of the annular upper end 9 is not distorted.

The manufacturing procedure of the flower container 1 will be described with reference to FIGS. First, the container body 3 is formed by a mold. The processing method of the mold for molding the container body 3 will be described in another section. Next, the annular upper end portion 9 is formed, and before it is completely cooled and hardened, it is fitted to the annular base 7 of the already cooled and hardened container body 3. The fitting of the annular upper end part 9 is not necessarily cooling hardening Although it is not necessary to do this before, if this is done, the gap between the annular upper end 9 and the annular base 7 is reduced by shrinkage due to cooling and hardening after fitting, and the seam between the two becomes inconspicuous Therefore, it is very preferable to bring out the solid feeling of the flower container 1. The extent to which the annular upper end portion 9 is cooled and hardened when it is fitted to the annular base portion 7 is, conversely, how high the temperature is to be kept is determined by the annular upper end portion 9 and the like. The adjustment should be made by comprehensively taking into account the properties of the synthetic resin material, the structure of the wall thickness, etc., and the ambient temperature when fitting.

When fitting the annular upper end 9 to the annular base 7, the lower end 91 of the inner wall plate 91 is firmly inserted into the receiving groove 7g, and the hidden rib 91r is attached to the tip of the first annular projection. So that it contacts the end face 7 1 u. At the same time, the notches 91c, 91c ... of the annular upper end 9 are received by the connecting ribs 7r, 7r ... in the receiving groove 7g to form the fitting structure 83. The fitting projection 75p is fitted to the fitting recess 95p and fitted. When fitting, check that the notch 9c of the connecting rib 9r holds the upper end 75u of the projection.

The method for processing the container body 3 will be described with reference to FIG. The processing of the container body mold 51 in the present embodiment is performed by causing an arc discharge between the graphite 53 as one electrode and the vessel body mold 51 as the other electrode, thereby forming a container body mold. It is performed by electric discharge, which performs machining while removing the surface of the mold 51 slightly. This is not to exclude machining other than electrical discharge machining, but it is one of the best methods to reproduce hand-made patterns on the surface of the molded container body 3 by hand-processing the graphite 53 This electric discharge machining is selected.

The electric discharge machining is performed by connecting a power source 55 with the processed graphite 53 and the container body mold 51 as electrodes, and supplying electricity in the machining fluid 57. As a result, hand-processed patterns, etc. are transferred to the container mold 51. Is done. When the transfer is completed, the mold processing is completed. The processing of Graphite 53 should be performed with the same sensation using the same tools as those used to attach patterns etc. to the unglazed container at that time. If done in this way, the feeling of handmade, for example, the roughness and ambiguity of the surface, etc. is faithfully expressed, and the highly handmade pattern etc. is reproduced on the surface of the container body 3. Highly hand-made patterns, etc., combined with the above-mentioned profound feeling, etc., realize a workmanship comparable to that of unglazed containers made of synthetic resin.

A modification of the annular upper end portion 109 of the present embodiment (hereinafter, referred to as a “first modification”) will be described with reference to FIG. The description of the first modified example will be made only for portions different from the annular upper end portion 9 of the present embodiment, and the description of the common portions will be omitted to avoid duplication. In addition, common parts will be described using the same member names as much as possible. Return to Fig. 6 and continue the explanation. The fitting upper end portion 109 in the first modified example has a cross-sectional shape similar to the fitting upper end portion 9 in which the letter "J" of the alphabet is inverted, and constitutes a long side portion thereof. The inner wall plate 191, the outer wall plate 1993 that forms the short side of the inner wall plate 191, and faces the inner wall plate 191, and the bent portion thereof, that is, the inner wall plate 191, and the outer wall plate And an upper end connecting portion 195 that forms a portion connecting the upper ends of 1993, and a hollow portion 109e is provided between the inner wall plate portion 91 and the outer wall plate portion 93. Is formed.

Reference numeral 175 denotes a third annular projection provided on an annular base 10 formed integrally with the upper end of the container body 103. The third annular projection 175 is constituted by a projection lower end 175d constituting the lower end thereof and a projection upper end 175u constituting the upper end thereof. The cross section of the projection upper end 1775u is formed in a shape similar to a half moon, and a fitting recess 1933f is formed in a thick portion thereof. On the other hand, a fitting convex portion 195 m is formed at the end of the outer wall plate portion of the fitting upper end portion 109, and the fitting convex portion 195m is fitted with the fitting concave portion 193f. Join It is formed as follows. The mating concave portion 193 f is formed with a mating convex portion 195 m together with a mating convex portion 195 m to receive the mating convex portion 195 m and mating with the annular upper end portion 109. It serves as a stopper when fitted to the base 107. The fitting with the container body 3 is preferably performed after the formation of the annular upper end portion 109 and before the cooling and hardening, similarly to the fitting in the present embodiment described above. This cooling and hardening makes the joint between the outer wall plate portion 1993 and the projection upper end portion 175u inconspicuous. It is even better if a pattern that makes this joint inconspicuous is placed around this joint.

A modified example (hereinafter, referred to as a “second modified example”) of the annular base of the present embodiment will be described with reference to FIGS. 7 and 8. The description of the second modified example and other modified examples to be described later will be made only for the annular base, and the description of the common parts will be omitted to avoid duplication. In addition, common parts will be described using the same member names as much as possible.

The annular base 207 of the second modified example will be described with reference to FIGS. 7 and 8. As in the present embodiment, the annular base portion 200 is formed integrally with the container body 203 to form a lower end portion of the annular jaw portion 205. The annular base portion 207 includes a first annular projection 271 projecting upward, a second annular projection 273 and a third annular projection 275, and the first annular projection 277 The second annular projections 273 are formed longer than the second annular projections 273, respectively, than the second annular projections 273. The base 27 1 b of the first annular projection 27 1 and the base 27 3 b of the second annular projection 27 3 and the base 27 7 b of the third annular projection 27 75 are the container body 20. 3 are connected from each other by a bottom portion 203 e that extends radially upward from the periphery of the opening portion 203 a. The first annular projection 27 1 is formed on the inner wall of the first annular projection 1 so as to share the inner wall surface with the container body 203, that is, on the extension of the inner wall surface of the container body 203. It is formed so that both are integrated. The second annular projection 2 7 3 The first annular projection 271 is formed through receiving grooves 200g (see FIG. 3) at predetermined intervals on the outside of the first annular projection 271, and the third annular projection 275 is formed of the second annular projection 273. It is formed on the outside with a predetermined gap 207k. The gap 207 k functions as a bending promoting space for elastically bending the third annular projection 275 toward the upper end opening 203 a side, but has an effect on the bending of the third annular projection 75. If not, the gap 207 k need not be formed.

The third annular projection 275 will be described in detail with reference to FIG. The third annular projection 275 is composed of a projection lower end 275 d that occupies almost the lower half thereof and a projection upper end 275 u representing the remaining upper half. The wall surface is connected to and integrated with the outer wall surface of the bottom portion 203 e. A step 281 is formed between the projection lower end 275 d and the projection upper end 275 u, and the inner wall of the projection upper 275 u has a plurality of projections projecting toward the center. .. Are formed at predetermined intervals in the circumferential direction. The fitting concave portion 275p forms a fitting structure 283 together with a fitting convex portion 295p described later.

As shown in FIG. 8, the annular upper end portion 209 has a cross-sectional shape as if the letter J of the alphabet was inverted, and an inner wall plate portion 291, which forms a long side portion thereof, An outer wall plate 2 93 which constitutes the short side thereof and faces the inner wall plate 291, and a bent portion thereof, that is, a portion connecting the upper ends of the inner wall plate 2 91 and the outer wall plate 2 93 And a hollow portion 209 e is formed between the inner wall plate portion 291 and the outer wall plate portion 293. The lower end portion 291 b of the inner wall plate portion 291 is inserted into the receiving groove 207 g formed between the first annular projection 271 and the second annular projection 273. It is formed in a shape sandwiched by both. The reason for this is that the play between the receiving groove 207 g and the lower end 291 b is made as small as possible, and the annular upper end 2 0 9 and annular base This is for stabilizing the fitting with 207.

As shown in FIG. 8, the outer wall plate portion 293 is fitted to the outside of the outer wall plate portion 293 in correspondence with the fitting concave portions 275 p, 275 p. Convex portions 295 p, 295 p... Are formed. The mating convex portion 2 95 p forms a mating structure 2 8 3 with the mating concave portion 2 75 p, and receives the mating concave portion 2 7 5 p to form the annular upper end 2 9 9 into the mating base 2 0. Plays the role of retaining when mated with 7. As described above, in the second modified example, the fitting concave portion 275 p is located at the projection upper end portion 275 u of the third annular projection 275, and the fitting convex portion 295 p is located at the outer wall plate portion 293. The outer wall is formed on the outer wall, however, the reverse is also possible, that is, the fitting projection may be formed on the former and the fitting recess may be formed on the latter.

A third modification will be described with reference to FIG. The third modified example is different from the second modified example in the method of forming the hollow portion. That is, the hollow portion 319 e in the third modified example is formed by extending the upper end 303 t of the container body 303 and wrapping it outside the upper end opening 303 a (to the right in FIG. 9). The formed annular folded piece 3 7 5 and the annular fitting piece 3 09 fitted through a fitting structure 3 85 5 for preventing the annular folded piece 3 f 5 from falling out of the lower region. It is formed. The upper end 303 t is formed integrally with the container body 303, and the thick end portion 375 a of the annular folded piece 375 is formed in a semilunar cross-sectional shape.

On the other hand, the annular fitting piece 309 includes a first annular projection 371, and a second annular projection 372 formed at a predetermined interval outside the first annular projection 371. It has a cross-sectional shape similar to that of Alphabet J, as shown in Fig. 9. The retaining fitting 3885 is formed by a fitting recess 395a provided on the outer wall of the container body 3 and a fitting projection 395s provided on the inner wall of the first annular projection 371. Intermediate and annular folded pieces 3 7 5 (3 7 5 a) Fitting recess 3 9 5 a provided on the inner wall and second annular projection 3 7 2 Fitting projection 3 9 provided on the outer wall Each is formed during 5 t. The fitting concave portion 395 a and the fitting convex portion 395 s can be omitted when the annular fitting piece 309 can be fixed to the container body 3 by an action such as friction. On the other hand, as shown in FIG. 10, the fitting structure 385 is fitted into the fitting recess 395c provided on the outer wall of the second annular projection 372, and the bent end of the annular folded piece 375 395 u may be configured to fit.

The hollow portion 4 19 e of Modification 4 shown in FIG. 11 includes an annular folded piece 4 7 5 formed by extending the upper end of the container body 4 3 and forming an outer opening 4 0 3 a to form an outer portion. A point formed by an annular fitting piece 409 fitted through a fitting structure 485 for retaining from the area below the folded piece 475, and an annular fitting piece 409. Is a third modified example including a first annular projection 471 and a second annular projection 472 formed outside the first annular projection 471 at a predetermined interval. Similar. The fitting structure 485 in the fourth modified example includes a fitting recess 495 a provided on the outer wall of the container main body 3 and a fitting projection 495 s provided on the inner wall of the first annular projection 471. And between the fitting projection 495 t provided on the outer wall of the annular folded piece 4 75 and the fitting recess 495 b provided on the inner wall of the second annular projection 4 75. The formed _c- engaging concave portion 495 a and the mating convex portion 495 s are the third if the annular fitting piece 409 can be fixed to the container body 403 by an action such as friction. It can be omitted as in the modification. Industrial applicability

As described above, the synthetic resin container and the method for producing the same according to the present invention can provide a synthetic resin container which has a solid feeling, is inexpensive, and can be mass-produced despite being a synthetic resin container.

Claims

The scope of the claims

1. The container body and

An annular jaw formed at the periphery of the upper end opening of the container body,

A hollow portion formed inside the annular jaw to increase the external thickness of the annular jaw;

The annular jaw comprises: an annular base integrally formed with the container body; and an annular upper end fitted to an upper end of the annular base.

The synthetic resin container characterized in that the hollow portion is formed inside the annular upper end portion.

2. The annular base includes a first annular protrusion, a second annular protrusion, and a third annular protrusion, each projecting upward,

The first annular projection is formed so as to share an inner wall surface with the container body,

The second annular protrusion is formed outside the first annular protrusion through a receiving groove at a predetermined interval,

The third annular protrusion is formed outside the second annular protrusion at a predetermined interval,

An inner wall plate formed in such a shape that a lower end thereof is sandwiched by the receiving groove; an outer wall plate facing the inner wall plate and the hollow portion; and an inner wall plate. An upper end connecting portion for connecting an upper end of the outer wall plate portion,

When the lower end of the inner wall plate is inserted into the receiving groove, an annular concealing rib that contacts the upper end of the first annular projection is formed on the inner wall surface of the inner wall plate.

A stopper for retaining between the outer wall of the third annular projection and the inner wall of the outer wall plate portion. The synthetic resin container according to claim 1, wherein a fitting structure is formed.

3. The synthetic resin container according to claim 2, wherein the inner wall plate portion is formed to be thinner than the outer wall plate portion.

4. The synthetic resin container according to claim 3, wherein a thickness of a lower end portion of the outer wall plate portion is formed to be tapered.

5. The synthetic resin container according to any one of claims 1 to 4, wherein the annular upper end is fitted to the annular base upper end before the annular upper end is cooled and hardened.

6. The container body and

The hollow portion is fitted with an annular folded piece formed by extending the upper end of the container main body and folding back to the outside of the upper end opening via a fitting structure for retaining the annular folded piece from a lower region of the annular folded piece. A synthetic resin container formed of an annular fitting piece.

7. The container body and

The annular jaw includes: an annular base integrally formed with the container body; and an annular upper end fitted to an upper end of the annular base.

The annular base includes a first annular protrusion, a second annular protrusion, and a third annular protrusion, each projecting upward,

The first annular projection is formed so as to share an inner wall surface with the container body. W face PC orchid 702

26

And

A synthetic resin container, wherein a fitting structure for retaining is formed between an inner wall of the third annular projection and an inner wall of the outer wall plate portion.

8. The container body,

The hollow portion is fitted with an annular folded piece formed by extending the upper end of the container main body and folding back to the outside of the upper end opening via a fitting structure for retaining the annular folded piece from a lower region of the annular folded piece. And an annular fitting piece,

The annular fitting piece includes: a first annular projection; and a second annular projection formed outside the first annular projection at a predetermined interval.

The fitting structure includes a portion between the outer wall of the container body and the inner wall of the first annular projection and a portion between the inner wall of the annular folded piece and the outer wall of the second annular projection. A synthetic resin container characterized by being formed.

9. The container body and

The fitting structure is formed between the outer wall of the container main body and the inner wall of the first annular protrusion and between the outer wall of the annular folded piece and the inner wall of the second annular protrusion, respectively. Synthetic resin container.

10. A part or all of a mold for molding the container body is processed by electric discharge machining using a partially or entirely hand-processed graphite as an electrode. Item 10. The synthetic resin container according to any one of Items 1 to 9.

11. A container made of a synthetic resin molded by a mold, wherein a part or all of the mold is processed by electric discharge machining using, as an electrode, a part or whole of a hand-machined graphite. A container made of synthetic resin.

1 2. A first step of manually forming irregularities on part or all of the graphite;

A second step of transferring the pattern to a mold by electric discharge machining using the hand-processed graphite as one electrode, A third step of forming a synthetic resin material using the mold; and a method for producing a synthetic resin container.

1 3. Tani ^ if body and

A hollow portion formed inside the annular jaw to increase the external thickness of the annular jaw; and

A first step of molding an annular base integrally with the container body by a mold, and a second step of molding an annular upper end fitted with the annular base having the hollow portion therein.

A third step of fitting the annular upper end portion to the annular base portion before the annular upper end portion is cooled and hardened, a method for producing a synthetic resin container.

14. The synthesis according to claim 13, wherein a part or all of the mold is processed by electric discharge machining using a partially or entirely hand-processed graphite as an electrode. A method for manufacturing a resin container.