JP2010241487A - Container for fermented soybean and manufacturing method of fermented soybean contained in container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a food container which is excellent in convenience since a lid can be separated from a container body easily at opening the lid and which has a high yield since a processed part for separation is not cut carelessly in a container manufacturing process. <P>SOLUTION: The food container 1 having the container body 2, the lid 3 and a hinge 6 is one piece formed product formed of a foamed resin. The container body 2 has a flange 7 at an opening 5. The lid 3 closes the opening 5. The hinge 6 connects the lid 3 to one side 8a of the flange 7. The processed part 11 for separation to separate the container body 2 and the lid 3 is formed at the hinge 6 or a position near the hinge in the food container 1. The processed part 11 for separation is composed of a groove 12 and a perforation 13. The groove 12 is formed continuously at the outer surface side S1 of the container. The perforation 13 is formed continuously at the inner surface side S2 of the container and composed of two or mores penetration holes 14 communicating with the groove 12 inside. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a food container having a container main body, a lid, and a hinge part, a method for manufacturing food in a container, and a food container manufacturing apparatus.

  Conventionally, paper food containers and foamed resin food containers have been known as containers for storing foods. Among them, foamed resin food containers are light, flexible in shape, and inexpensive. It is widely used because of its merit. Such a foamed resin food container includes, for example, a container body having a concave cross-sectional shape and having a flange portion at an opening, a lid for closing the opening of the container body, and the like. The lid body is connected to one side of the flange portion via a hinge portion. Then, for example, food such as natto is stored in the container body, and in this state, the lid body is rotated and superimposed on the container body, whereby the food container is closed and the lid body is welded to the flange portion. It is like that.

  By the way, when taking food such as natto from the food container at the time of eating, the welded part will be peeled off and the lid will be opened, but when the food is agitated if the lid remains left The lid may get in the way. In this state, when the food container is placed on the table, the container body tends to be inclined and unstable. Therefore, in order to easily separate the container main body and the lid at a predetermined location of the food container, it is conventionally performed to form a separation processing portion such as a perforation in advance (for example, Patent Document 1, 2). Such a perforation can be formed by, for example, cutting a food container using a rotary blade 101 having a plurality of teeth 102 whose tips are blades 103 (see FIG. 10).

JP-A-9-136353 Japanese Patent No. 3720165

  However, in the case of a food container made of foamed resin of the prior art, it is difficult to give an appropriate mechanical strength to the perforation that is a separation processing part, and for that purpose, setting of cutting conditions within a very narrow preferred range is required. Manufacturing was complicated. Accordingly, the mechanical strength of the perforation portion may become too weak, and in this case, the perforation is easily cut off easily during the container manufacturing process, and defective products are likely to be generated. There was a problem that yield was difficult to achieve. On the other hand, if the strength of the perforated portion becomes too strong, a large force is required to separate the lid from the container body, so that the lid is difficult to separate. Therefore, if you try to force separation, not only will the food container break up irregularly, it will not be possible to separate it cleanly, but there will also be problems such as food spilling from the container body and container debris getting on the food there were. In addition, when the container body and the lid are firmly fixed by ultrasonic welding, such a problem is expected to be particularly noticeable when the lid is opened. Development was desired.

  The present invention has been made in view of the above-mentioned problems, and the object thereof is excellent in convenience because the lid body can be separated from the container body relatively easily when the lid is opened, while the separation processing section is not used in the container manufacturing process. It is to provide a food container with a high yield because it is not ready. Another object of the present invention is to provide a method for producing a packaged food, which can efficiently produce a food while producing the above-mentioned food container excellent in convenience at a high yield. Still another object of the present invention is to provide a food container manufacturing apparatus suitable for manufacturing the above-described excellent food container.

  Then, when this inventor earnestly researched in order to solve the said subject, paying attention to the separation process part for isolate | separating a container main body and a cover body, the improvement was tried. And after trial and error, instead of forming a separation processing part consisting of mere perforations, we found out that good results can be obtained by forming a separation processing part composed of grooves and perforations, Furthermore, this knowledge has been developed and the following problem solving means [1] to [15] have been conceived. These are listed here.

  [1] From an integrally molded product made of a foamed resin having a container body having a flange portion in the opening, a lid for closing the opening, and a hinge portion for connecting the lid to one side of the flange portion And the food processing container in which a separation processing part for separating the container body and the lid is formed, the separation processing part is formed at the hinge part or a position near the hinge part, and the container outer surface side A food container comprising: a groove portion formed continuously at the inner surface; and a perforation formed by a plurality of through holes which are intermittently formed on the inner surface side of the container and communicate with the groove portion.

  [2] The food container according to means 1, wherein the depth of the groove is 0.1 mm or more, and the thickness of the portion left without forming the groove is 0.4 mm or more.

  [3] The food container according to means 1 or 2, wherein an interval between the plurality of through holes in the perforation is 1 mm or more and 10 mm or less.

  [4] The lid body has a rectangular shape in plan view having four sides, and at least a part of at least two sides of the lid body other than the side on the hinge part arrangement side is the flange portion of the container body. The food container according to any one of the means 1 to 3, wherein the food container is welded to the food container.

  [5] The food container according to any one of means 1 to 4, wherein the separation processing part is formed on a side of the lid on the hinge part arrangement side.

  [6] The food container according to any one of means 1 to 5, wherein the food container is a natto container.

  [7] From an integrally molded product made of foamed resin having a container body having a flange portion in the opening, a lid for closing the opening, and a hinge portion for connecting the lid to one side of the flange portion A storage step for storing food in a food container, a lid closing step for closing the lid and closing the opening of the container body after the storage step, and a container outer surface side after the lid closing step A separation processing portion constituted by a groove portion formed continuously at the inner surface of the container and a perforation formed intermittently on the inner surface side of the container and communicating with the groove portion inside, A method for producing a packaged food, comprising: a separation processing portion forming step formed in a position near the hinge portion.

  [8] In the separation processing portion forming step, the separation processing portion is formed so that a depth of the groove portion is 0.1 mm or more and a thickness of a portion left without forming the groove portion is 0.4 mm or more. The manufacturing method of the foodstuffs in a container of the means 7 characterized by the above-mentioned.

  [9] The means 7 or 8, wherein in the separation processing portion forming step, the separation processing portion is formed so that an interval between the plurality of through holes in the perforation is 1 mm or more and 10 mm or less. Of manufacturing food in containers.

  [10] The means 7 to 9 are characterized in that, in the separation processing portion forming step, the separation processing portion is formed by machining the foamed resin material, which is a material for forming the food container, without heat denaturation. The manufacturing method of the foodstuff in a container of any one of Claims 1.

  [11] In the separation processing portion forming step, cutting is performed using a rotary blade having a plurality of teeth continuously provided over the entire circumference of the outer peripheral portion and the entire edge portion of the teeth being a blade. The method for producing a food in a container according to means 10, wherein the groove and the perforation are formed simultaneously.

  [12] The lid body has a rectangular shape in plan view having four sides, and after the lid closing step and before the separation processing portion forming step, three sides other than the side on the hinge portion arrangement side in the lid body The manufacturing method of the foodstuffs in a container of any one of the means 7 thru | or 11 characterized by performing the welding process in which a part of at least 2 side is welded with respect to the said flange part of the said container main body.

  [13] The food container according to any one of means 7 to 12, wherein the separation processing part is formed on a side of the lid on the hinge part arrangement side.

  [14] The method for producing a food in a container according to any one of means 7 to 13, wherein the food container is a natto container, and the food is natto.

  [15] An apparatus for producing a food container according to any one of means 1 to 6, comprising a plurality of teeth arranged continuously over the entire circumference of the outer peripheral portion, and the entire edge portion of the tooth A food container manufacturing apparatus comprising a rotary blade having a blade.

  Therefore, according to the first to sixth aspects of the invention, the lid body can be separated from the container main body relatively easily when the lid is opened, so that the convenience of the process is excellent, while the separation processing portion is not carelessly cut during the container manufacturing process. Therefore, a food container having a high yield can be provided. According to invention of Claims 7-14, the manufacturing method of the foodstuff with a container which can manufacture food efficiently can be provided, manufacturing said food container excellent in convenience with high yield. . According to the invention of the fifteenth aspect, it is possible to provide a food container manufacturing apparatus suitable for manufacturing the excellent food container.

The front view which shows the food container of the state which closed the cover of this embodiment. The top view which shows the said food container of the state which closed the lid | cover. In the food container in the opened state, (a) is a diagram showing the outer side of the container, and (b) is a diagram showing the inner side of the container. The expanded sectional view in the AA line of the food container of FIG. (A) is sectional drawing in the BB line of FIG. 4, (b) is sectional drawing in the CC line of FIG. (A)-(e) is the schematic for demonstrating the manufacturing method of the foodstuffs in a container of this embodiment along a procedure. Schematic for demonstrating the food container manufacturing apparatus of this embodiment. The elements on larger scale which show the rotary blade with which the said apparatus is provided. The figure for demonstrating the test method of an Example. Schematic which shows the rotary blade used for the process of the food container of a prior art.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. In the present embodiment, the food container of the present invention is embodied in a natto container, and the method for producing the containerized food of the present invention is embodied in a method for producing a containered natto.

  First, the natto container 1 will be described. 1 and 2 show a natto container 1 in a state where a natto 2 which is food is stored and closed, and in this embodiment, this state is defined as containered natto (contained food). FIGS. 3A and 3B show the natto container 1 in the natto with the container expanded and the natto 2 omitted for convenience of explanation. In detail, Fig.3 (a) shows the container outer surface side S1 in the natto container 1 of a lid open state, and FIG.3 (b) shows the container inner surface side S2 in the natto container 1 of a lid open state.

  The natto container 1 of this embodiment is made of a foamed resin having a container main body 2, a lid 3 and a hinge portion 6, and is an integrally molded product manufactured using a mold. For example, foamed polystyrene or the like is selected as the foamed resin. The container body 2 of the present embodiment has a square shape in plan view having four sides, and has a square-shaped opening 5 at the top. The container body 2 has a concave cross-sectional shape as a whole, and the concave portion serves as a storage portion 4 for storing the natto 21. The opening 5 of the container body 2 is integrally formed with a flange portion 7 extending horizontally toward the outside. The lid body 3 of the present embodiment is a part for covering and closing the opening 5, has a square shape in plan view having four sides like the container body 2, and has substantially the same outer dimensions as the container body 2. . One side of the lid 3 (that is, the side 8a on the hinge portion arrangement side) is connected to one side of the flange portion 7 of the container body 3 via a hinge portion 6 for enabling the lid 3 to be opened and closed. Has been. The hinge portion 6 is formed so that the thickness of the material is thinner than that of the container body 2 and the lid body 3 so that the deformation is likely to occur. For example, in this embodiment, the thickness of the container body 2 and the lid 3 is set to 1.9 mm, and the thickness of the hinge 6 is set to about 0.7 mm to 1.3 mm.

  As shown in FIG. 2, the lid 3 includes three sides 8b, 8c, and 8d in addition to the side 8a on the hinge portion arrangement side. With reference to the side 8a on the hinge arrangement side, the side 8b located on the free end side (in other words, located on the opposite side) is in a positional relationship parallel to the side 8a, and the other two sides 8c and 8d are It is in a positional relationship orthogonal to.

  In the natto-containing container of the present embodiment, at least a part of at least two sides among the three sides 8b, 8c, 8d other than the side 8a on the hinge portion arrangement side of the lid 3 is welded to the flange portion 7 of the container body 2. Has been. More specifically, one side 8b in the lid body 3 is thermally welded to the flange portion 7 by two welding portions 16, and another two sides 8c and 8d in the lid body 3 are each provided in one location. The welded portion 16 is ultrasonically welded to the flange portion 7 (see FIG. 2). Therefore, in the natto-containing container of the present embodiment, the lid 3 is relatively firmly fixed to the container body 2.

  In the natto container 1 of the present embodiment, a separation processing portion 11 for separating the container main body 2 and the lid body 3 is formed on the side 8 a on the hinge portion arrangement side in the lid body 3. The separation portion 11 is linearly formed along the direction in which the hinge portion 6 extends at a position in the vicinity of the hinge portion in the lid body 3 (specifically, a location about 1 mm to 5 mm away from the hinge portion 6). (See FIGS. 2-5). The separation processing portion 11 includes a single groove portion 12 continuously formed on the container outer surface side S1, and a plurality of slit-shaped through holes intermittently formed on the container inner surface side S2 and communicating with the groove portion 12 inside. The perforation 13 is composed of a hole 14. That is, the separation processing unit 11 of the present embodiment is structurally different from the separation processing unit composed of only perforations.

  As shown in FIGS. 4 and 5, the depth D1 of the groove 12 and the thickness D2 of the portion 15 left without forming the groove 12 are not particularly limited, but to be strong, the depth D1 of the groove 12 is 0. It is preferable that the thickness D2 of the remaining portion 15 is 1 mm or more and 0.4 mm or more. When the depth D1 is less than 0.1 mm, the groove portion 12 becomes too shallow, and as a result, the performance is not different from that of a conventional natto container having only perforations. That is, the preferable range of processing conditions becomes very narrow, for example, the mechanical strength at the perforation is too strong, and in this case, a large force is required to separate the lid 3 from the container body 2. This is necessary, and the lid 3 is difficult to separate. When the thickness D2 is less than 0.4 mm, the area of the portion connecting the lid 3 and the hinge portion 6 is reduced, and the mechanical strength of the portion becomes too weak. There is a high possibility that it will break in stages. Therefore, in this case, it may be difficult to achieve a high yield.

  The interval L1 between the plurality of through holes 14 in the perforation 13 is not particularly limited, but it is preferably 1 mm or more and 10 mm or less. If the distance L1 is greater than 10 mm, the mechanical strength at the separation processing portion 11 becomes too strong, and a large force is required to separate the lid 3 from the container body 2, and the lid 3 is separated. It becomes difficult to do. If the distance L1 is less than 1 mm, the mechanical strength at the location of the separation processing portion 11 becomes too weak, and as a result, there is a high possibility that the separation processing portion 11 will be cut at the processing stage. Therefore, in this case, it may be difficult to achieve a high yield.

  Incidentally, the dimension in the longitudinal direction of the plurality of through holes 14 in the perforation 13 (that is, the dimension in the direction parallel to the groove 12) is not particularly limited, and is set to 1 mm or more and 20 mm or less, for example. The width (that is, the dimension in the short direction) of the plurality of through-holes 14 is not particularly limited and is arbitrary, but is set to, for example, 1 mm or less (preferably 0.1 mm to 0.8 mm). In this case, if the plurality of through-holes 14 are set to a size substantially equal to the width of the groove portion 12, for example, both can be processed and formed using a common tool, which is convenient in terms of the manufacturing process.

  Next, based on FIG. 6, the method of manufacturing the containered natto in this embodiment is demonstrated.

  In the manufacturing method of natto in a container, first, the natto container 1 before forming the separation processing part 11 is prepared (see FIG. 6A), and the lid 3 is opened and the whole is horizontal. The natto 21 is stored in the storage unit 4 at a predetermined position in the middle of the transfer (storage process: see FIG. 6B). At this stage, natto 21 has been planted with fungi but has not yet undergone fermentation.

  Next, the natto container 1 is closed by rotating the lid 3 of the natto container 1 that has undergone the storage process by about 180 degrees and moving the lid 3 to a position that covers the opening 5 of the container body 2 ( Lid closing step: see FIG. 6 (c)). At this stage, the natto container 1 has not been completely closed yet. Such a lid closing process is performed while the natto container 1 is being transported in the horizontal direction, in other words, continuously (for example, using a guide rail or the like) without stopping the natto container 1 being transported. Is preferable from the viewpoint of improving production efficiency.

  Next, welding is performed on the natto container 1 with the lid closed, and a part of the three sides 8b, 8c, 8d other than the side 8a on the lid portion 3 side of the lid 3 is respectively attached to the flange portion 7 of the container body 2. And fix (welding process: see FIG. 6 (d)). Specifically, first, one side 8b of the lid 3 is thermally welded to the flange portion 7 by two welding portions 16. Subsequently, the other two sides 8 c and 8 d in the lid 3 are ultrasonically welded to the flange portion 7 by one welding portion 16.

  Next, the separation processing unit forming process is performed using the following device 31 to form the separation processing unit 11 in the natto container 1 in the lid closed state (see FIG. 6E). FIG. 7 is a schematic view for explaining a natto container processing apparatus 31 (food container manufacturing apparatus) of the present embodiment, and FIG. 8 is a partially enlarged view showing a rotary blade 32 provided in the apparatus 31.

  The natto container processing apparatus 31 includes an apparatus main body 35, container transporting means, container upper pressing means, a motor (not shown) that drives these means in synchronization, and a transmission structure (not shown) that drives and connects these means and the motor. And a control device (not shown) for controlling the drive of the motor.

  The container transport means is for transporting the natto container 1 in a closed state in the horizontal direction, and is disposed on the apparatus main body 35. This container transport means is configured by, for example, winding an endless lower transport belt 36 between a pair of rolls so as to be able to go around. The bottom surface of the container body 2 of the natto container 1 in the closed state is placed on the upper surface of the lower transport belt 36. In FIG. 7, the horizontal arrows attached to the lower conveyance belt 36 mean the moving direction of the lower conveyance belt 36. Further, the lower conveyance belt 36 may be configured to contact the lower surface of the flange portion 7 instead of the bottom surface of the container body 2. In this case, the natto container 1 can be transported in a state where the flange portion 7 is sandwiched from above and below by the lower transport belt 36 and a pressing belt 37 which will be described later, and the processing section is stabilized.

  The container upper pressing means is disposed above the container conveying means. For example, an endless pressing belt 37 is wound around a pair of rolls so as to be able to turn. The lower surface of the pressing belt 37 is in contact with the lid 3 of the natto container 1 in the lid closed state. The pressing belt 37 conveys the natto container 1 in the horizontal direction in synchronization with the container conveying means while pressing the lid 3 from above. Therefore, since the natto container 1 is sandwiched between the lower conveyance belt 36 and the holding belt 37, the natto container 1 can be reliably conveyed at a relatively high speed while preventing the natto container 1 from being displaced. Can be done. In FIG. 7, a horizontal arrow attached to the pressing belt 37 means a moving direction of the pressing belt 37.

  The natto container processing apparatus 31 of the present embodiment further includes a cutting processing means having a rotary blade 32. The rotary blade 32 is attached to the support shaft 38 and is disposed in a state parallel to the conveyance direction at a position avoiding the pressing belt 37 above the lower conveyance belt 36. The support shaft 38 supports the rotary blade 32 in a rotatable manner, but is not connected to the driving means. Therefore, the rotary blade 32 rotates following the conveyance of the natto container 1. In addition, the lowermost part of the rotary blade 32 is set to a height position in contact with the container outer side surface S1 (that is, the upper surface of the lid 3) of the natto container 1 conveyed in the horizontal direction.

  As shown in FIGS. 7 and 8, the rotary blade 32 has a disk shape with a thickness of 1 mm, and a plurality (30 in the present embodiment) continuously arranged at an equal pitch over the entire circumference of the outer peripheral portion. It has teeth 33. The entire edge portion of each tooth 33 is a blade 34 (that is, an edge portion where the plate thickness is gradually reduced). That is, in the tooth 33 of the present embodiment having a substantially trapezoidal shape, not only the tip edge of the blade 34 but also both side edges are edge portions.

  And when the natto container 1 passes through the location with such a rotary blade 32, the rotary blade 32 contacts the hinge part vicinity position in the upper surface of the cover body 3 in that case, and the contacted part is cut linearly. The As a result, the groove part 12 and the perforation 13 which comprise the separation process part 11 are formed simultaneously. In the case of the rotary blade 32, a plurality of through holes 14 are formed by the tip edges of the teeth 33 that penetrate deeply into the lid 3 and penetrate the foamed resin material, and become the perforations 13 on the container inner surface side. On the other hand, in the portion having the V-shaped cut between the teeth 33, the tip edge of the tooth 33 does not penetrate the foamed resin material. 15). Moreover, since the whole edge part of the tooth | gear 33 which becomes the blade 34 acts about the shallow part in a foamed resin material, it will cut all over and the desired groove part 12 will continue in container outer surface side S1. And in a suitable shape. Thus, in the case of this embodiment which performs the cutting process by the rotary blade 32, the separation process part 11 can be formed, without carrying out the heat denaturation of the foamed resin material which is a forming material of the natto container 1.

  The natto in a container that has undergone the above-described separation processing part forming step becomes a final product through a predetermined storage period for proceeding fermentation, and is shipped. The container-containing natto produced in this way may be opened from the side 8b on the free end side as usual, but may be opened from the side 8a on the hinge portion arrangement side on the opposite side. That is, at least one of the sides 8c and 8d of the lid 3 is inserted with a fingertip at a position close to the side 8a on the hinge portion arrangement side, and an upward force is applied to peel off the side 8a on the hinge portion arrangement side. Thus, the separation processing portion 11 is broken, and the side 8a on the hinge portion arrangement side of the lid 3 is separated from the container body 2. Further, the welded part is peeled off to completely separate the lid 3 from the container body 2.

  In this case, if at least one of the sides 8c and 8d of the lid 3 is formed with a notch at a position close to the side 8a on the hinge portion arrangement side, the fingertip can be inserted into the notch. The operation of peeling off the side 8a on the part arrangement side can be easily performed. The shape of the notch is not particularly limited, and can be, for example, V-shaped, U-shaped, I-shaped, arc-shaped, or the like. In addition, the site | part which should start the peeling operation | work for lid opening can be clarified by forming a notch. Further, a mark indicating the lid open position may be formed on the upper surface of the lid 3.

  Examples of the present invention will be described below, but the present invention is not limited to these examples.

  In this embodiment, cutting is performed by changing the depth D1 of the groove 12, the thickness D2 of the portion 15 left without forming the groove 12, and the interval L1 of the through hole in the perforation 13, and the hinge in the lid 3 A plurality of types of sample products having the separation processing part 11 on the side 8a on the part arrangement side were actually produced. It should be noted that the thickness of the foamed resin material at the portion to be machined is 1.9 mm, the dimensions of the plurality of through holes 14 are all about 3 mm, the width of the plurality of through holes 14 and the width of the groove 12. Both were about 0.8 mm.

  Then, each sample product obtained was subjected to an evaluation test using a tensile strength measuring device 41 (manufactured by SHIMPO, “FGN-2 Digital Force Gauge”) as shown in FIG. 9.

First, a rectangular hole 42 was opened at a position eccentric from the center of the lid 3, and the hook portion 43 protruding from the tensile strength measuring instrument 41 was hooked into the hole 42. In this state, the container body 2 was pulled by hand in the left direction in FIG. 9, and the tensile strength measuring device 41 was pulled by hand in the right direction in FIG. Then, the peak value of the force required until the lid 3 was completely cut off and separated was measured, and this value was defined as “force required for separation of the lid 3”. In each test section, five sample products were prepared, and the average value of the measured peak values was used. Since the tensile strength measuring instrument 41 used here has a measurement limit of 2.0 kg, the one exceeding this measurement limit or the one that is clearly broken at another position without being cut off at the position of the separation processing portion 11 is used. , "Measurement impossible". The results are shown in Table 1 below. In the table, “◯” means that the sharpness is good, “Δ” means that it is difficult to cut, and “×” means that it cannot be cut.

  As is apparent from Table 1, in the test section having the perforation 13 but not having the groove portion 12, there is no portion where the evaluation becomes “◯”, and the interval L1 between the through holes 13 is 1 mm. The evaluation was only “△”, and the evaluation was “x” in other cases. In other words, in these test sections corresponding to the prior art, it is difficult to give an appropriate mechanical strength to the perforation 13 which is a separation processing portion. For this purpose, the cutting conditions are set within a very narrow preferable range. It was obvious that there was a drawback that the manufacturing was complicated.

  On the other hand, in the test section in which not only the perforation 13 but also the groove portion 12 was formed, generally favorable results were obtained as shown in Table 1. In particular, when the depth D1 of the groove 12 is 0.1 mm to 1.3 mm, the thickness D2 of the remaining portion 15 is 0.6 mm to 1.8 mm, and the distance L1 between the through holes 13 is 1 mm to 5 mm It was concluded that this range is a very suitable condition because it does not break at the processing stage and does not break when the lid is opened. The width of such a preferable range is considerably wider than that in the above-described test section in which the groove portion 12 is not provided although the perforation 13 is present. Incidentally, when the depth D1 of the groove 12 is set to 1.5 mm, the thickness D2 of the remaining portion 15 is set to 0.4 mm, and the value of the interval L1 between the through holes 13 is set to 1 mm or more, a problem occurs in a subsequent process. Although there was some risk, this was also suitable according to the above case. However, when the depth D1 of the groove 12 is 1.8 mm, the thickness D2 of the remaining portion 15 is 0.1 mm, or the interval L1 between the through holes 13 is 0.5 mm. Some of them are cut off at the processing stage of the separation processing section 11, and it is difficult to adopt as an actual product.

  Therefore, according to the present embodiment, the following effects can be obtained.

  (1) According to the present embodiment, the groove portion 12 is formed continuously on the container outer surface side S1, and the plurality of through holes 14 are formed intermittently on the container inner surface side S2 and communicate with the groove portion 12 inside. It has a separation processing section 11 constituted by perforations 13. Further, here, the separation processing portion 11 is formed in the vicinity of the hinge portion in the lid 3. For this reason, mechanical strength that is extremely suitable for the separation processing unit 11, that is, a machine that can relatively easily separate the lid 3 from the container body 2 when the lid is opened, but does not accidentally break during the container manufacturing process. It is possible to impart a desired strength. Therefore, it is possible to provide the natto container 1 which is excellent in convenience when the lid is opened and has a high yield.

  (2) In the present embodiment, the depth D1 of the groove 12, the thickness D2 of the remaining portion 15, and the value of the interval L1 between the through holes 13 are set within the above-described preferable ranges. It is possible to reliably impart a very suitable mechanical strength. Moreover, since such a suitable range is not so narrow as compared with the conventional example, such a suitable mechanical strength can be imparted relatively easily, and the manufacture of the natto container 1 becomes complicated. Absent.

  (3) In this embodiment, since a part of the other three sides 8b, 8c, 8d other than the side 8a on the hinge portion arrangement side in the lid 3 is welded to the flange portion 7, the lid 3 is It is firmly fixed to the container body 2 and has a structure in which the stored natto 2 is difficult to leak. On the other hand, since the fixing strength of the side 8b on the free end side is stronger than the side 8a on the hinge portion arrangement side, it is usually difficult to open the lid by peeling off the free end side. However, the lid can be easily opened by forming the separation processing portion 11 on the side 8a on the hinge portion arrangement side and peeling the separation processing portion 11 from the separation processing portion 11. Therefore, the convenience can be improved while ensuring the basic performance required for food containers to prevent leakage of stored items.

  (4) In the present embodiment, the separation processing portion 11 is formed by the separation processing portion forming step of performing the cutting using the rotary blade 32. However, according to this method, the foamed resin material is not thermally denatured. There are advantages. In addition, when a processing method involving thermal denaturation of the foamed resin material is employed, a heat tool, a temperature control means, a drive control means, and the like are required. Therefore, there is a possibility that not only the manufacturing equipment becomes large and the equipment cost increases, but also the maintenance of the heat tool or the like may become complicated, resulting in an increase in the cost of the product. On the other hand, if it is a natto container processing apparatus 31 like this embodiment, since it is only necessary to contact the rotary blade 32 that can follow and rotate, a relatively simple equipment configuration can be achieved. For this reason, it is possible to reduce the equipment cost, and it is not necessary to perform complicated maintenance, and as a result, the cost of the product can be easily reduced.

  (5) In this embodiment, since the separation processing part forming process using the natto container processing apparatus 31 is performed not after the lid closing process but after the lid closing process, the natto container 1 is closed. It is possible to perform a desired cutting process while continuously conveying at a relatively high speed. For this reason, the productivity of natto in a container can be improved reliably.

In addition, you may change embodiment of this invention as follows.
In the above embodiment, the present invention is embodied in the case where the container main body 2 has one storage portion. For example, the present invention is embodied in a configuration in which a partition portion is provided inside the container main body 2 to form a plurality of storage portions. May be. Specific examples thereof include, for example, providing two large and small storage units in the container body 2, storing natto in a large storage unit, and storing seasonings in a small storage unit.

  -In above-mentioned embodiment, although this invention was actualized as a manufacturing method of natto containing a container, it can also be actualized as a manufacturing method of what put foods other than natto into the container made from foamed resin.

  In the above embodiment, the separation processing portion 11 constituted by the groove portion 12 and the perforation 13 is formed at a position near the hinge portion in the lid 3, but for example, this is formed at a position near the hinge portion in the container body 2. Alternatively, it may be formed on the hinge portion 6 itself. Here, considering that the separation processing part forming step is performed in a state where food is stored, it is not preferable to incline or turn the food container upside down. The In the above-described method, when the lid 3 is formed near the hinge portion, the rotary blade 32 is vertically arranged above the food container and cutting is performed from above. Moreover, when forming in the hinge part vicinity position in the container main body 2, the rotary blade 32 is vertically arrange | positioned under the food container, and it cuts from the downward direction. Moreover, when forming in hinge part 6 itself, the rotary blade 32 is horizontally arrange | positioned by the side of a food container, and it cuts from a horizontal direction. Comparing these three processing modes, the method of forming the separation processing portion 11 at a position near the hinge portion in the lid 3 (that is, the method of the above embodiment) is advantageous. According to the method of the above embodiment, since the separation processing portion 11 formed by cutting is located on the upper surface of the food container 1, there is an advantage that the appearance inspection of the processed portion is easy to perform and the process management is easy. It is. In addition, it is not structurally difficult to install the rotary blade 32 at such a position. For example, a structure in which the flange portion 7 is sandwiched from above and below by the lower conveyance belt 36 and the pressing belt 37 is also possible. This is because it can be realized relatively easily. In addition, it is preferable because the adjustment work and the maintenance work of the apparatus can be performed relatively easily. Further, since the tilting operation and the reversing operation are not required, it is possible to avoid a decrease in productivity and an increase in equipment cost. In addition, if the lid 3 is thicker than the hinge portion 6, there is an advantage that the separation processing portion 11 constituted by the groove portion 12 and the perforation 13 can be formed with high accuracy.

  In the above embodiment, only one separation processing portion 11 is provided, but two or more may be provided.

  In the above embodiment, the container body 2 and the lid 3 are both square in plan view, but are not limited to this, for example, rectangular shape in plan view, triangular shape in plan view, hexagonal shape in plan view, and plan view You may make it circular shape etc.

  In the above embodiment, a part of the three sides 8b, 8c, 8d of the lid 3 is welded to the flange portion 7, but the present invention is not limited to this. For example, a part of two sides (8b and 8c, 8b and 8d, or 8c and 8d) in the lid 3 may be welded to the flange portion 7, and only one side (8b, Part of 8c or 8b) may be welded to the flange portion 7. In this case, any method of heat welding and ultrasonic welding may be used.

In the above embodiment, the cutting process for forming the separation processing unit 11 is performed using the rotary blade 32 provided with the teeth 33 having a substantially trapezoidal shape over the entire circumference of the outer peripheral part. As long as it is 34, it does not necessarily have a substantially trapezoidal shape. For example, a rotary blade provided with triangular teeth (so-called saw teeth) can be used. Moreover, it is not limited only to the cutting process by the rotary blade 32, For example, it is also possible to perform a cutting process using the metal mold | die which has a part corresponded to the some tooth | gear 34. FIG.
Next, the technical ideas grasped by the embodiment described above are listed below.

  (1) The food container according to any one of the means 1 to 6, wherein the separation processing part is for peeling off the side of the lid on the hinge part arrangement side to open the lid.

  (2) An apparatus for manufacturing the food container according to any one of means 1 to 6, wherein the container transporting means for transporting the food container in a state where the food is stored and the lid is closed in a horizontal direction. And a container upper holding means for holding the upper surface of the food container, and a plurality of teeth arranged continuously over the entire circumference of the outer peripheral portion, and the entire edge portion of the teeth is a blade. A rotary blade that is arranged so as to be in contact with the upper surface of the food container, and performs cutting by rotating following the conveyance of the food container. Manufacturing equipment.

DESCRIPTION OF SYMBOLS 1 ... Natto container as a food container 2 ... Container main body 3 ... Cover body 4 ... Storage part 5 ... Opening 6 ... Hinge part 7 ... Flange part 8a ... Side on the hinge part arrangement side 11 ... Separation processing part 12 ... Groove part 13 ... Sewing machine Eye 14 ... Through hole 31 ... Natto container processing device as food container manufacturing device 32 ... Rotary blade 33 ... Tooth 34 ... Blade S1 ... Outer side of container S2 ... Inner side of container D1 ... Depth depth D2 ... Thickness of remaining part L1: interval between through holes

The present invention natto container having a container body and a lid and a hinge portion, a method of manufacturing containers natto relates natto container manufacturing device.

The present invention has been made in view of the above-mentioned problems, and the object thereof is excellent in convenience because the lid body can be separated from the container body relatively easily when the lid is opened, while the separation processing section is not used in the container manufacturing process. It is to provide a natto container with a high yield because it is not ready. Another object of the present invention is to provide a method for producing natto containing containers, which can efficiently produce natto while producing the above-described natto containers excellent in convenience at a high yield. Still another object of the present invention is to provide a natto container manufacturing apparatus suitable for manufacturing the above-described excellent natto container.

Then, when this inventor earnestly researched in order to solve the said subject, paying attention to the separation process part for isolate | separating a container main body and a cover body, the improvement was tried. And after trial and error, instead of forming a separation processing part consisting of mere perforations, we found out that good results can be obtained by forming a separation processing part composed of grooves and perforations, Furthermore, this knowledge has been developed and the following problem solving means [1] to [ 13 ] have been conceived. These are listed here.

[1] and the container body having a concave cross-sectional profile of the accommodating portion for accommodating the Rutotomoni natto having a flange portion on the opening, a lid for closing said opening, wherein with respect to one side of the flange portion In the natto container, which is formed of an integrally molded product made of foamed resin having a hinge part for connecting the lid, and in which a separation part for separating the container body and the lid is formed, the separation part is A single groove is formed at the hinge portion or near the hinge portion, and a groove portion formed continuously on the outer surface side of the container, and a plurality of grooves formed intermittently on the inner surface side of the container and communicating with the groove portion inside. A natto container characterized by comprising perforations made of through holes.

[2] The natto container according to means 1, wherein the depth of the groove is 0.1 mm or more, and the thickness of the portion left without forming the groove is 0.4 mm or more.

[3] The natto container according to means 1 or 2, wherein an interval between the plurality of through holes in the perforation is 1 mm or more and 10 mm or less.

[4] The lid body has a rectangular shape in plan view having four sides, and at least a part of at least two sides of the lid body other than the side on the hinge part arrangement side is the flange portion of the container body. The natto container according to any one of means 1 to 3, wherein the container is welded to the natto container.

[5] The natto container according to any one of means 1 to 4, wherein the separation processing part is formed on a side of the lid on the hinge part arrangement side.

[6] and container body having a concave cross-sectional profile of the accommodating portion for accommodating the Rutotomoni natto having a flange portion on the opening, a lid for closing said opening, wherein with respect to one side of the flange portion A storage step of storing natto in a natto container made of an integrally molded product made of foamed resin having a hinge portion that connects the lid, and after the storage step, the lid is closed to close the opening of the container body A lid closing step, a groove portion continuously formed on the outer surface side of the container after the lid closing step, and a plurality of through holes intermittently formed on the inner surface side of the container and communicating with the groove portion inside the separation process unit constituted by a sewing machine eyes consisting of containers natto manufacturing method which comprises a separation process portion forming step of forming only one strip to the hinge or hinge portion vicinity.

[ 7 ] In the separation processing portion forming step, the separation processing portion is formed so that the depth of the groove portion is 0.1 mm or more and the thickness of the portion left without forming the groove portion is 0.4 mm or more. The method for producing natto in a container according to means 6 , characterized in that:

[ 8 ] The means 6 or 7 is characterized in that, in the separation processing portion forming step, the separation processing portion is formed so that an interval between the plurality of through holes in the perforation is 1 mm or more and 10 mm or less. Of manufacturing natto in a container.

[9] In the above separation process portion forming step, the means 6 to 8, characterized by forming the separation process unit of the foamed resin material is a material for forming the food container by machining without heat denatured A method for producing natto in a container according to any one of the above items.

[ 10 ] In the separation processing portion forming step, cutting is performed using a rotary blade having a plurality of teeth continuously provided over the entire circumference of the outer peripheral portion and having the entire edge portion of the teeth as a blade. The method for producing natto in a container according to means 9 , wherein the groove and the perforation are formed simultaneously.

[ 11 ] The lid body has a rectangular shape in plan view having four sides, and after the lid closing step and before the separation processing portion forming step, three sides other than the side on the hinge portion arrangement side in the lid body The method for producing natto in a container according to any one of means 6 to 10 , wherein a welding step is performed in which at least a part of two sides is welded to the flange portion of the container body.

[ 12 ] The natto container according to any one of means 6 to 11 , wherein the separation processing part is formed on a side of the lid on the hinge part arrangement side.

[ 13 ] An apparatus for producing a natto container as described in any one of means 1 to 5 , comprising a plurality of teeth arranged continuously over the entire circumference of the outer circumference and the entire edge of the teeth A natto container manufacturing apparatus comprising a rotary blade having a blade.

Therefore, according to the first to fifth aspects of the invention, the lid body can be relatively easily separated from the container body when the lid is opened, and thus the convenience is excellent, while the separation processing section is not carelessly cut during the container manufacturing process. Therefore, a natto container having a high yield can be provided. According to invention of Claims 6-12 , the manufacturing method of the natto containing a container which can manufacture natto efficiently while manufacturing said natto container excellent in convenience with a high yield can be provided. . According to the invention described in claim 13, it is possible to provide a suitable natto container manufacturing apparatus for manufacturing a superior natto container above.

The present invention, natto container having a container body and a lid and a hinge portion, in which relates to the production how the containers natto.

The present invention has been made in view of the above-mentioned problems, and the object thereof is excellent in convenience because the lid body can be separated from the container body relatively easily when the lid is opened, while the separation processing section is not used in the container manufacturing process. It is to provide a natto container with a high yield because it is not ready. Another object of the present invention is to provide a method for producing natto containing containers, which can efficiently produce natto while producing the above-described natto containers excellent in convenience at a high yield .

Then, when this inventor earnestly researched in order to solve the said subject, paying attention to the separation process part for isolate | separating a container main body and a cover body, the improvement was tried. And after trial and error, instead of forming a separation processing part consisting of mere perforations, we found out that good results can be obtained by forming a separation processing part composed of grooves and perforations, Furthermore this finding by developing it had come to conceive the following means for solving problems [1] to [8]. These are listed here.

[1] and the container body having a concave cross-sectional profile of the accommodating portion for accommodating the Rutotomoni natto having a flange portion on the opening, a lid for closing said opening, wherein with respect to one side of the flange portion In the natto container, which is formed of an integrally molded product made of foamed resin having a hinge part for connecting the lid, and in which a separation part for separating the container body and the lid is formed, the separation part is A single groove is formed at the hinge portion or near the hinge portion, and a groove portion formed continuously on the outer surface side of the container, and a plurality of grooves formed intermittently on the inner surface side of the container and communicating with the groove portion inside. A depth of the groove portion is 0.1 mm or more, a thickness of a portion left without forming the groove portion is 0.4 mm or more, and the perforation in the perforation The interval between the multiple through holes The hook portion of the tensile strength measuring instrument is hooked in a hole that is not smaller than 5 mm and not larger than 5 mm and is eccentric from the center of the lid, and in this state, the container body and the measuring instrument are pulled away from each other. , when measured the force required until the lid is separated cut away completely, natto containers average value of the measured peak values, wherein the this is less than 0.399kg least 0.10 kg.

[ 2 ] The lid has a rectangular shape in plan view having four sides, and at least a part of at least two of the three sides other than the side on the hinge portion arrangement side of the lid is the flange portion of the container body. The natto container according to the means 1 , which is welded to the natto container.

[ 3 ] The natto container according to means 1 or 2 , wherein the separation processing part is formed on a side of the lid on the hinge part arrangement side.

[4] the container body having a concave cross-sectional profile of the accommodating portion for accommodating the Rutotomoni natto having a flange portion on the opening, a lid for closing said opening, wherein with respect to one side of the flange portion A storage step of storing natto in a natto container made of an integrally molded product made of foamed resin having a hinge portion that connects the lid, and after the storage step, the lid is closed to close the opening of the container body A lid closing step, a groove portion continuously formed on the outer surface side of the container after the lid closing step, and a plurality of through holes intermittently formed on the inner surface side of the container and communicating with the groove portion inside A separation processing portion forming step in which only one strip is formed in the hinge portion or a position near the hinge portion. In the separation processing portion formation step, the depth of the groove portion is included. Becomes 0.1 mm or more, Forming the separation processed portion so that the thickness of the portion left without forming the portion is 0.4 mm or more, and the interval between the plurality of through holes in the perforation is 1 mm or more and 5 mm or less. Hook the hook part of the tensile strength measuring instrument in the hole opened at an eccentric position from the center of the body, and in this state, pull the container body and the measuring instrument away from each other, and the lid is completely cut off. when measuring the force required to separate Te method of containers natto average value of the measured peak value is characterized that you to be equal to or less than 0.399kg least 0.10 kg.

[5] In the above separation process portion forming step, as described in section 4, characterized in that to form the separation process unit of the foamed resin material is a material for forming the food container by machining without heat denatured Manufacturing method of natto in a container.

[ 6 ] In the separation processing portion forming step, cutting is performed using a rotary blade having a plurality of teeth continuously provided over the entire circumference of the outer peripheral portion and having the entire edge of the teeth as a blade. The method for producing natto in a container according to means 5 , wherein the groove and the perforation are formed simultaneously.

[ 7 ] The lid body has a rectangular shape in plan view having four sides, and after the lid closing step and before the separation processing portion forming step, three sides other than the side on the hinge portion arrangement side in the lid body The method for producing natto in a container according to any one of means 4 to 6 , wherein a welding step is performed in which at least a part of two sides is welded to the flange portion of the container body.

[ 8 ] The method for producing natto in a container according to any one of means 4 to 7 , wherein the separation processing part is formed on a side of the lid on the hinge part arrangement side.

Therefore, according to the invention described in claim 1 to 3, while the excellent convenience because it can relatively easily separated the lid from the container body when the lid opening, separation processing unit does not turn off inadvertently in the container manufacturing process Therefore, a natto container having a high yield can be provided. According to invention of Claims 4-8 , the manufacturing method of the natto containing a container which can manufacture natto efficiently can be provided, manufacturing said natto container excellent in convenience with a high yield. .

[1] and the container body having a concave cross-sectional profile of the accommodating portion for accommodating the Rutotomoni natto having a flange portion on the opening, a lid for closing said opening, wherein with respect to one side of the flange portion In the natto container, which is formed of an integrally molded product made of foamed resin having a hinge part for connecting the lid, and in which a separation part for separating the container body and the lid is formed, the separation part is A single groove is formed at the hinge portion or near the hinge portion, and a groove portion formed continuously on the outer surface side of the container, and a plurality of grooves formed intermittently on the inner surface side of the container and communicating with the groove portion inside. The depth of the groove is 0.1 mm or more and 1.5 mm or less, and the thickness of the portion left without forming the groove is 0.4 mm or more and 1.8 mm or less. And the perforation The interval between the plurality of through-holes is 1 mm or more and 5 mm or less, and a hook portion of a tensile strength measuring device is hooked in a hole opened at a position eccentric from the center of the lid, and in this state, the container body and the measurement When the force required until the lid is completely cut off and separated is measured by pulling the container away from each other, the average value of the measured peak values is 0.10 kg or more and 0.399 kg or less. A natto container characterized by

[4] the container body having a concave cross-sectional profile of the accommodating portion for accommodating the Rutotomoni natto having a flange portion on the opening, a lid for closing said opening, wherein with respect to one side of the flange portion A storage step of storing natto in a natto container made of an integrally molded product made of foamed resin having a hinge portion that connects the lid, and after the storage step, the lid is closed to close the opening of the container body A lid closing step, a groove portion continuously formed on the outer surface side of the container after the lid closing step, and a plurality of through holes intermittently formed on the inner surface side of the container and communicating with the groove portion inside the separation process unit constituted by a sewing machine eyes consisting of, viewed contains a separation process portion forming step of forming only one strip to the hinge or hinge portion vicinity, in the separation process portion forming step, the depth of the groove 0.1mm to 1.5mm The separation processed portion is formed so that the thickness of the portion left without forming the groove portion is 0.4 mm or more and 1.8 mm or less, and the interval between the plurality of through holes in the perforation is 1 mm or more and 5 mm or less. By forming, hook the hook portion of the tensile strength measuring instrument in the hole opened at a position eccentric from the center of the lid, and in this state, pull the container body and the measuring instrument away from each other, as measured the force required to separate the lid is cut away completely, containers the average value of the measured peak value is characterized that you to be equal to or less than 0.399kg least 0.10kg Natto manufacturing method.

Claims (15)

A container body having a flange portion in the opening, a lid for closing the opening, and a integrally formed product made of foamed resin having a hinge portion for connecting the lid to one side of the flange portion, In the food container in which a separation processing part for separating the container main body and the lid is formed,
The separation processing portion is formed at the hinge portion or a position near the hinge portion, and is continuously formed on the outer surface side of the container, and intermittently formed on the inner surface side of the container, and communicates with the groove portion inside. A food container comprising a perforation composed of a plurality of through holes.   The depth of the said groove part is 0.1 mm or more, and the thickness of the part left without forming the said groove part is 0.4 mm or more, The food container of Claim 1 characterized by the above-mentioned.   The food container according to claim 1 or 2, wherein an interval between the plurality of through holes in the perforation is 1 mm or more and 10 mm or less.   The lid body has a rectangular shape in plan view having four sides, and at least a part of at least two sides out of the three sides other than the side on the hinge portion arrangement side of the lid body is with respect to the flange portion of the container body. The food container according to any one of claims 1 to 3, wherein the food container is welded.   The food container according to any one of claims 1 to 4, wherein the separation processing part is formed on a side of the lid body on a hinge part arrangement side.   The food container according to any one of claims 1 to 5, wherein the food container is a natto container. A food container comprising an integrally molded product made of foamed resin having a container body having a flange portion in the opening, a lid for closing the opening, and a hinge portion for connecting the lid to one side of the flange portion A storage process for storing food in
After the storing step, a lid closing step for closing the lid and closing the opening of the container body;
After the lid closing step, the groove portion is formed continuously on the outer surface side of the container, and the perforation is formed intermittently on the inner surface side of the container and includes a plurality of through holes communicating with the groove portion inside. A separation processing part forming step of forming a separation processing part at a position near the hinge part or the hinge part.   In the separation processing portion forming step, the separation processing portion is formed so that a depth of the groove portion is 0.1 mm or more and a thickness of a portion left without forming the groove portion is 0.4 mm or more. The manufacturing method of the foodstuffs in a container of Claim 7.   The container according to claim 7 or 8, wherein, in the separation processing portion forming step, the separation processing portion is formed so that an interval between the plurality of through holes in the perforation is 1 mm or more and 10 mm or less. A method of manufacturing food containing food.   10. The separation processing portion forming step, wherein the separation processing portion is formed by machining a foamed resin material, which is a material for forming the food container, without heat denaturation. A method for producing a food in a container according to item 1.   In the separation processing portion forming step, the groove portion is cut by using a rotary blade having a plurality of teeth continuously provided over the entire circumference of the outer peripheral portion and having the entire edge portion of the teeth as a blade. And the perforation is formed at the same time. The lid has a rectangular shape in plan view having four sides,
After the lid closing step and before the separation processing portion forming step, at least two of the three sides other than the side on the hinge portion arrangement side of the lid body are in contact with the flange portion of the container body. The method for producing a packaged food according to any one of claims 7 to 11, wherein a welding step of welding is performed.   The method for producing a food product in a container according to any one of claims 7 to 12, wherein the separation processing part is formed on a side of the lid body on a hinge part arrangement side.   The method for producing food in a container according to any one of claims 7 to 13, wherein the food container is a natto container, and the food is natto.   It is an apparatus for manufacturing the food container of any one of Claim 1 thru | or 6, Comprising: It has a several tooth | gear connected continuously over the perimeter of an outer peripheral part, and the whole edge part of the said tooth | gear is a blade A food container manufacturing apparatus comprising a rotating blade.

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