JPH086732Y2 - Food container - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a bottom plate formed by a mold and a peripheral plate standing upright on the periphery of the bottom plate, such as a forming barrel containing food such as umeboshi and Kinzanji miso. The present invention relates to a food container provided with a synthetic resin food container having a portion and a decorative ring inserted into the outer peripheral surface of the peripheral plate portion, and particularly, with a simple configuration, the decorative ring is used as a food product. The present invention relates to a food container that can be reliably locked to the outer peripheral surface of a peripheral plate portion of a storage portion.

[0002]

2. Description of the Related Art In recent years, the use of wood, which is said to lead to deforestation, tends to be restricted. Therefore, instead of a food container such as a barrel using a natural product such as wood or bamboo, a molded product having a shape imitating these is used instead. Conventionally, as a substitute as described above, for example, a food container in which a peripheral plate part and a bottom plate part, which are respectively replaced by a wooden peripheral plate and a bottom plate, are integrally molded, and the food container are separately formed by a thin bamboo knitting. A molding barrel having a decorative ring formed by imitating the pattern and color of the above. In the molding barrel, the top opening is generally formed in a tapered shape wider than the bottom. As a material for such a molded product, a synthetic resin that is inexpensive and easy to mold is often used. In particular, polypropylene resin, which has excellent moldability and durability, is often used. Generally, mutually contacting articles made of polypropylene resin are slippery. Therefore, in such a food container, after the food is put in the container and the lid is closed, when the package is wrapped, the string is wound up and down in a vertical direction to bind and fix the lid, and the lid is fitted to the upper end portion of the peripheral plate portion. The decorative ring that had been used may shift downwards, making the product unattractive. Therefore, in some cases, a groove is formed on the outer peripheral surface of the peripheral plate portion along the circumferential direction, and the decorative wheel is locked in the groove. However, in the conventional molding barrel, in addition to the molding process of the primary processing,
A relatively complicated groove engraving process was required as the subsequent processing, which was unsuitable for mass production of the molding barrel, which requires continuous and quick production.

Therefore, as a means for solving the above problems, a synthetic resin molding barrel disclosed in Japanese Utility Model Publication No. 48-112771 is known. This molding barrel
The food storage part for storing food and a decorative ring having a bamboo-knit appearance are provided, and the decorative ring is fitted to the outer peripheral surface of the food storage part and locked by the outer peripheral projection of the food storage part. ing. In addition, in the molding barrel disclosed in Japanese Utility Model Laid-Open No. 50-9370, a plurality of leg projections are formed in the lower portion of the food container in addition to the outer peripheral projection that locks the decorative ring. A semi-circular recess formed between these leg projections is hooked with a packing string, for example.

[0004]

By the way, in the case of molding a molding barrel having an outer peripheral projection, a so-called "pulling die" in which a molded product is pulled out in the axial direction of the die, the molded product is extracted due to the presence of the outer peripheral projection. Is hindered. In addition, if the molded product has a complicated shape having leg projections and the like, there is a problem that the molded product is more difficult to pull out from the female mold.
Therefore, in such a case, a so-called "split mold" is generally used, which is divided into a plurality of pieces in the circumferential direction when a molded product is extracted. However, the split mold has the drawback that the shape of the split mold seam remains in the molded product and impairs the appearance, in particular, the split mold is divided into a plurality of split mold pieces, and a driving mechanism for driving each split mold piece is also used. It has a drawback that it is relatively expensive because of its complicated structure such as necessity. For the reasons as described above, the molding barrel provided with the outer peripheral projection for locking the decorative wheel has not been manufactured by the punching die conventionally.

Therefore, an object of the present invention is to provide a food container in which a food container having an outer peripheral projection for locking a decorative wheel can be easily manufactured at low cost and for mass production.

[0006]

In order to achieve the above object, a food container according to the present invention is molded in a molding space between a male mold and a female mold and stands on a bottom plate portion and a peripheral edge of the bottom plate portion. A food container having a peripheral plate portion provided, a decorative wheel inserted into the outer peripheral surface of the peripheral plate portion, and the decorative wheel formed on the outer peripheral surface of the peripheral plate portion to lock the decorative wheel. In a food container having an outer peripheral protrusion, an inner peripheral protrusion that locks the food container to the male mold is provided on the inner peripheral surface of the peripheral plate portion, and the inner peripheral protrusion corresponds to the female mold at the time of die cutting. The inner peripheral protrusion is configured to be engaged with the male mold more strongly than the engaging force of the outer peripheral protrusion.

Further, in the bottom plate portion of the above-mentioned structure of the food container, a plurality of downwardly extending leg projections are provided in the vicinity of the peripheral edge along the peripheral edge, and square groove-shaped recesses are formed between the leg projections. It will be done.

[0008]

In the food container according to the present invention, when the male mold is separated from the female mold when the molded food container is demolded, the inner force against the male mold is larger than the engaging force of the outer peripheral projection with respect to the female mold. Since the engagement force of the circumferential protrusion is stronger,
The food container is extracted from the female mold with its inner peripheral projection being locked to the male mold. That is, although the food container has the outer peripheral protrusions as described above, the presence of the inner peripheral protrusions allows the food container to be produced, for example, by a "cutting die" which has a simple structure and is inexpensive.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view of a food container used in a barrel according to an embodiment of the present invention.
[Fig. 3] is a sectional view of the food container taken along the line AA in Fig. 1, and Fig. 3 is a bottom view of the food container. In each of the above figures, 2 is a barrel 1 which is an example of a food container (see FIG. 4).
Is a food container (an example of a food container of the present invention) having an open top surface. In the food container 2, 3 is a bottom plate portion having a circular shape in plan view, 4 is a peripheral plate portion integrally provided on the peripheral edge of the bottom plate portion 3 along the circumferential direction, and 5 is a peripheral plate portion 4. An outer peripheral projection 6 is provided on the upper part of the outer peripheral surface so as to continuously project outward in the circumferential direction, and 6 is provided near the lower end of the outer peripheral surface of the peripheral plate portion 4 so as to continuously project outwardly in the circumferential direction. An outer peripheral projection, 7 is an inner peripheral projection that is provided in the vicinity of the bottom plate portion 3 and projects inwardly inward on the inner peripheral surface of the peripheral plate portion 4 continuously in the circumferential direction. For example, twelve leg projections are provided so as to project downward at predetermined intervals in the direction. That is, between the leg projections 10 and 10, the square groove-shaped concave portions C recessed upward are formed, respectively. still,
The outer peripheral surface of the peripheral plate portion 4 is formed in a tapered shape that widens upward.

FIG. 4 is a perspective view of the barrel 1. The barrel 1 is
As shown in the figure and FIG. 2, for example, a commercially available decorative wheel 8 and a decorative wheel 9 are attached to predetermined positions of the food container 2 configured as described above. First, the upper decorative wheel 8 is inserted from the lower end of the food container 2 and locked on the outer peripheral projection 5. Subsequently, the lower decorative wheel 9 is inserted and locked on the outer peripheral projection 6. Therefore, each of the food container 2, the decorative ring 8 and the decorative ring 9 is made of a material such as polypropylene resin which is slippery with respect to each other, and the peripheral plate portion 4 is tapered as described above. However, both the decorative ring 8 and the decorative ring 9 are securely locked to the outer peripheral surface of the peripheral plate portion 4 by the outer peripheral projection 5 and the outer peripheral projection 6. Since the leg protrusions 10 as described above are provided, the cord can be locked in the recess C between the leg protrusions 10. Therefore, when the string is wound in the vertical direction of the barrel 1 and tightly bound, the string is securely locked in the corners of the recess C, and is not dislocated from the recess C without being displaced in the circumferential direction. do not do.

On the other hand, since twelve recesses C between the leg projections 10 are provided at regular intervals in the circumferential direction, a so-called "string R ₃ " shown by a one-dot chain line as shown in FIG. "Three-sided barrel binding" or so-called "four-sided barrel binding" can be performed beautifully like the string R ₄ shown by the chain double-dashed line. Moreover, the binding shape of these strings R ₃ and R ₄ does not largely collapse. The number of leg projections 10 provided in the vicinity of the peripheral edge of the bottom plate portion 3 (the lower end portion of the peripheral plate portion 4 in this example) is not limited to twelve, and the binding direction of the string in the plan view is not limited. The number may be set to an appropriate number depending on the number.

The molding operation of the food container 2 will be described below with reference to FIGS. 5 and 2. In FIG. 5, 20 is a molding die used in an injection molding machine (not shown). In this molding die 20, a female die 2 integrally provided on a mounting plate 21 which is a fixed side of the injection molding machine.
3 and the female die 24, and the male die 25 and the male die 26 that are integrally provided in the movable portion 27 that is opened from the female die 24 in the direction of the arrow D when the molded product is taken out with the BB arrow plane as a boundary. A molding space 30 is formed therein.

A peripheral groove 35 for forming the outer peripheral projection 5 of the food container 2 and a peripheral groove 36 for forming the outer peripheral projection 6 are engraved on the inner peripheral surface of the female mold 24. ing. The groove width and depth of the circumferential groove 35 are set so that the outer peripheral projection 5 shown in FIG. 2 has a width W ₁ and an outward protruding length L ₁ . Further, the groove width and the depth of the peripheral groove 36 are also determined by the outer peripheral projections 6.
Is set to have a width W ₂ and an outward protruding length L ₂ . Further, a peripheral groove 37 for forming the inner peripheral protrusion 7 is formed on the outer peripheral surface of the male die 25. The groove width and depth of the circumferential groove 37 are set so that the inner circumferential projection 7 shown in FIG. 2 has a width W ₃ and an inward projection length L ₃ .

Therefore, in a state where the molding die 20 is assembled as shown in FIG. 5, a polypropylene resin in a molten state from the injection molding machine is injected from the injection port 33 and the communication space 3 is formed.
1 to fill the molding space 30. Molding space 30
The polypropylene resin therein solidifies by cooling the female mold 24 to form the food container 2. Reference numeral 11 denotes a protrusion left after the polypropylene resin solidified in the communication space 31 is cut. Next, the movable portion 27 is driven in the direction of arrow D and opened from the female mold 24 with the BB arrow plane as a boundary. In this case, since the engaging force of the inner peripheral projection 7 with respect to the male mold 25 is stronger than the engaging force of the outer peripheral projection 5 and the outer peripheral projection 6 with respect to the female mold 24, the inner peripheral projection 7 is formed with the male mold 25. The food container 2 is locked in the circumferential groove 37 of the
Is accompanied by the male die 25 and automatically extracted from the female die 23 and the female die 24.

At this time, the outer peripheral projection 5 and the outer peripheral projection 6 are pressed against the groove walls of the peripheral groove 35 and the peripheral groove 36, respectively, and elastically deformed inward in the axial direction of the food container 2, whereby the peripheral groove 35 is formed. And is removed from the circumferential groove 36. That is, the outer peripheral projection 5
The outward protrusion length L ₁ and the outward protrusion length L ₂ of the outer peripheral protrusion 6 were devised based on the results of many experiments conducted by the present inventor, and the inner peripheral protrusion for the male mold 25 was 7 in consideration of the relationship with the engaging force, and to prevent the outer peripheral projection 5 and the outer peripheral projection 6 from being damaged at the time of extraction from the female mold 24, the length is smaller than the maximum inward elastic deformation amount at that time. Each is set. Also, the leg protrusion 1
Despite having a plurality of 0s, the food container 2 can be smoothly extracted from the female molds 23 and 24 without being separated from the male mold 25 due to the presence of the inner peripheral projection 7.

Subsequently, the food container 2 taken out along with the movable part 27 is automatically taken out from the male mold 25 in the direction opposite to the arrow D by the relative displacement operation of the male mold 25 and the male mold 26. Be done. At this time, the inner peripheral projection 7 is pressed against the groove wall of the peripheral groove 37 and elastically deforms outward in the axial direction of the food container 2, and is thereby removed from the inner peripheral groove 37. That is,
The inward protruding length L ₃ of the inner peripheral projection 7 is devised based on the results of many experiments also conducted by the present inventor, and the inner peripheral projection 7 is extracted when the male die 25 is pulled out.
Is set to a length smaller than the maximum outward elastic deformation amount at that time so as not to be damaged.

As described above, according to the food container 2 of the barrel 1 of this embodiment, the outer peripheral projection 5 and the outer peripheral projection 6 are simply provided on the outer peripheral surface of the peripheral plate portion 4 by using the molding die 20. Needless to say, the decorative ring 8 and the decorative ring 9 can be reliably locked by, respectively, and in the present embodiment, the outer peripheral projection 5 as described above is used.
Despite being a food container 2 having a structure and a peripheral projection 6, the food container 2 can be easily manufactured by using a relatively simple and inexpensive "punch" type molding die 20. Therefore, it is suitable for mass production. Therefore, compared with the case of manufacturing using a "split mold" type molding die,
The food container 2 can be produced at low cost. In addition, since the seam marks as in the case of using the "split mold" do not appear on the surface, the food container 2 having a good appearance can be obtained.

In the above embodiment, the outer peripheral protrusion 5, the outer peripheral protrusion 6 and the inner peripheral protrusion 7 are formed continuously on the peripheral surface of the peripheral plate portion 4 in the circumferential direction along the peripheral direction. The present invention is not limited to the example, and may be, for example, a dot shape formed in plural at appropriate intervals along the circumferential direction.

[0019]

Since the present invention is constructed as described above, it is possible to produce a food container having an outer peripheral projection for locking a decorative wheel by using, for example, a relatively simple and inexpensive punching die. it can. That is, the food container can be easily extracted from the female mold in a state where the inner peripheral projection of the food container is locked to the male mold.

Further, since the cord wound around the food container is securely locked in the rectangular groove-shaped recess, it is possible to prevent the cord from being displaced in the circumferential direction and falling out. In addition, even when the concave portion having the function of preventing the positional displacement of the cord and the leg projection are provided, the food container can be smoothly pulled out from the female die of the punch by providing the inner circumferential projection.

[Brief description of drawings]

FIG. 1 is a perspective view of a food container used in a barrel according to an embodiment of the present invention.

FIG. 2 is a sectional view of the food container taken along the line AA in FIG.

FIG. 3 is a bottom view of the food container.

FIG. 4 is a perspective view of the barrel.

FIG. 5 is a cross-sectional view of a main part of a molding die used in an injection molding machine that molds the food container.

[Explanation of symbols]

 1 barrel 2 food container 3 bottom plate part 4 peripheral plate part 5 outer peripheral protrusion 6 outer peripheral protrusion 7 inner peripheral protrusion 8 decorative ring 9 decorative ring 10 leg protrusion 20 molding die 23 female mold 24 female mold 25 male mold 30 male mold 30 Molding space C Recess

Claims (2)

[Scope of utility model registration request] 1. A food storage part formed in a molding space between a male mold and a female mold and having a bottom plate part and a peripheral plate part standing upright on the periphery of the bottom plate part, and the peripheral plate part. In a food container comprising a decorative ring inserted into the outer peripheral surface of, and an outer peripheral protrusion formed on the outer peripheral surface of the peripheral plate portion to lock the decorative ring, the inner peripheral surface of the peripheral plate portion An inner peripheral protrusion for locking the food container to the male mold is provided, and the inner peripheral protrusion is stronger than the engaging force of the outer peripheral protrusion with respect to the female mold at the time of removing the mold. A food container formed so as to engage with each other. 2. The bottom plate portion is provided with a plurality of downwardly extending leg projections along the peripheral edge in the vicinity of the peripheral edge thereof, and angular groove-shaped recesses are formed between the leg projections. Food container.