JP2020175928A - Container for rice ball - Google Patents

Abstract

To provide a container for a rice ball in which one type of tray serves as a lid and a body so that the tray has a hinge shaft that bends appropriately under the weight of the rice ball.SOLUTION: A plurality of rice ball storage portions 22 are arranged on a frame 21 which is a flat surface. The container for rice balls has a tray 2 which is the resin integrally molding as a body and a lid, and has convex parts 23, 25 and concave parts 24,26 that are in a fitting relationship at a line symmetry sandwiching an intermediate line LML in a longitudinal direction of the frame 21. Of the frame parts sandwiched between the adjacent storage portions 22, a part of the frame parts arranged along a pair of line symmetries LSL sandwiching the intermediate line LML in a longitudinal direction of the frame 21 are formed on a recessed surface 213 for bending which is lowered from a flat surface 211. For the remaining part of the frame part, the flat surface 211 is left as it is, and the other frame part is formed on a reinforcing recessed surface 212 lowered from the flat surface 211.SELECTED DRAWING: Figure 1

Description

The present invention relates to a container for sushi balls that stores sushi balls for nigiri sushi and is used for transportation or storage.

The sushi ball container stores a large number of sushi balls for nigiri sushi and is transported from the factory to restaurants and supermarkets. The container for rice balls (tray for transporting rice lumps) disclosed in Patent Document 1 is composed of a resin main body (tray body) and a lid provided with a large number of storage portions (recesses) for storing rice balls (sushi lumps). (Patent Document 1, [Claim 1]). The container for rice balls disclosed in Patent Document 1 has to have a pair of a main body and a lid, which is inconvenient (Patent Document 1 [0006]). Therefore, a container for rice balls composed of one type of tray in which the main body and the lid are indistinguishable has been proposed (Patent Document 2).

The container for rice balls disclosed in Patent Document 2 has a structure in which one type of tray in which convex portions and concave portions having a close mating relationship are provided on a frame is used as a main body and a lid, and a pair of convex portions and concave portions are provided. It is provided at a line-symmetrical position across the longitudinal intermediate line or the lateral intermediate line of the frame (Patent Document 1, [Claim 2]). In the container for rice balls disclosed in Patent Document 2, one of the two trays can be used as the main body and the other can be turned upside down to be used as the lid, regardless of the main body and the lid. Therefore, one type of tray can be manufactured. This is sufficient, and manufacturing costs and management costs can be reduced (Patent Document 1, [0011]).

Registered Utility Model No. 3167901 JP-A-2017-145016

In the container for rice balls disclosed in Patent Document 2, in order to reduce the manufacturing cost, a tray is generally manufactured as a resin integrally molded product having elasticity. For this reason, the rice balls are stored in the storage portion of the tray that is the main body, and when the container for rice balls covered with the tray that is the lid is lifted, the weight of the rice balls causes the main body to be on the bottom side, for example, in the longitudinal direction of the frame. The lid bends following the main body as long as it bends convexly and the fitted state of the convex and concave parts is maintained. Specifically, the tray serving as the main body bends convexly toward the bottom surface, and the tray serving as the lid bends convexly toward the top surface side.

At this time, if the tray bends evenly over the longitudinal direction of the frame, the main body that receives the weight of the rice balls will inevitably bend more and the lid will come off from the main body. In this case, bending of the tray is suppressed by increasing the thickness of the tray, which is an integrally molded resin product, or by providing a recessed surface in a frame portion sandwiched between adjacent storage portions to increase the rigidity of the tray. However, increasing the thickness of the tray has a problem that the manufacturing cost of the tray increases. In addition, even if a recessed surface is provided in the frame portion sandwiched between adjacent storage portions, the difference in the degree of bending between the main body and the lid does not change, only the tray becomes difficult to bend as a whole, and the lid is still from the main body. There is a risk that it will come off.

Here, if the tray has a hinge shaft and the tray tries to bend due to the weight of the rice ball, the hinge shaft only bends, and the frame, which is the flat surface of the lid and the main body, is in close contact with the frame and the convex and concave parts are fitted. If the fit is maintained, the lid will not easily come off the body. The hinge shaft is configured such that a plurality of frame portions arranged in the longitudinal direction or the lateral direction of the frame are all flat surfaces. However, the hinge shafts with only flat surfaces lined up are unnecessarily easy to bend, making it difficult to stably store rice balls in the storage section. Therefore, in a container for rice balls in which one type of tray is a lid and a main body, a tray having a hinge shaft that bends appropriately under the weight of the rice balls was examined.

The one developed as a result of the examination is provided with a plurality of storage parts for rice balls arranged side by side on a frame that is a flat surface, and is convex at a line-symmetrical position sandwiching an intermediate line in the longitudinal direction or the lateral direction of the frame. In a container for rice balls whose main body and lid are trays of resin integrally molded products provided with portions and recesses, an intermediate line in the longitudinal direction or the lateral direction of the frame among the frame portions sandwiched between adjacent storage portions. Alternatively, a part of a plurality of frame portions arranged along a pair of axisymmetric lines sandwiching the intermediate line is formed on a concave surface for bending lowered from a flat surface, and the remaining portion of the frame portion remains a flat surface as it is. The other frame portion is a container for a rice ball, which is formed on a recessed surface for reinforcement lowered from a flat surface. The tray is a resin integrally molded product and has elasticity and flexibility.

The "convex portion and concave portion having a fitting relationship" is a portion having a transfer shape and having a convex portion fitting into the concave portion. There may be a gap between the fitted convex portion and the concave portion, but it is preferable that the surface of the convex portion and the surface of the concave portion come into contact with each other to generate frictional resistance and the fitting is not easily separated. When the surface of the convex portion and the surface of the concave portion come into contact with each other, the surface of the convex portion and the surface of the concave portion do not have to be the whole of the convex portion or the concave portion, respectively. You may just make contact. In addition, a plurality of convex portions and concave portions may be arranged in a plurality of combinations of only one type, or a plurality of combinations of a plurality of types may be arranged.

When a pair of convex portions and concave portions are provided "at a line symmetric position sandwiching an intermediate line in the longitudinal direction or the lateral direction of the frame", the convex portions are provided with the convex portions and the concave portions to be fitted as a set. The position and the position where the recess is provided are in a line-symmetrical positional relationship with the intermediate line in the longitudinal direction (bisector in the longitudinal direction) or the intermediate line in the lateral direction (bisector in the lateral direction) of the frame. It means that there is. Specifically, a configuration in which convex portions are arranged on one side and concave portions are arranged on the other side across an intermediate line in the longitudinal direction or the lateral direction of the frame, or the convex portions and the front side are arranged on the one side and the back side. An example is a configuration in which concave portions are arranged on the side, concave portions are arranged on the other side and the back side, and convex portions are arranged on the front side.

Of the frame portions sandwiched between adjacent storage portions, a part of a plurality of frame portions arranged along an intermediate line in the longitudinal direction or the lateral direction of the frame or a pair of axisymmetric lines sandwiching the intermediate line is bent. The concave surface and the flat surface are mixed and lined up. For example, if there are five storage compartments with an intermediate line in the lateral direction of the frame in between, and five frame portions are lined up along the intermediate line, two dented surfaces for bending are flat on the remaining three. A surface is formed. In this case, the arrangement may be such that the three inner flat surfaces are sandwiched between the bending concave surfaces at both ends, or the bending concave surfaces and the flat surfaces may be alternately arranged. The flat surface makes it easy to bend a plurality of frame portions arranged in the longitudinal direction or the lateral direction of the frame, and the reinforcing recessed surface increases the cross-sectional coefficient of the plurality of frame portions arranged in the longitudinal direction or the lateral direction of the frame and bends. Make it difficult.

Of the frame portions sandwiched between the adjacent storage portions, the other frame portions are formed on the reinforcing recessed surface lowered from the flat surface. The storage portion has a substantially rectangular shape in a plan view to match the rice balls. From now on, the "frame portion sandwiched between the adjacent storage portions" will be a frame on all four sides corresponding to the four sides of the storage portion, and reinforcing recessed surfaces will be formed on all four sides of the storage portion. As a result, the cross-sectional coefficient of the frame on the four sides of the storage portion is increased, and the rigidity is increased. As a result, the integrity of the tray is ensured in the range where the reinforcing recessed surface is provided, and the tray is less likely to bend in the range.

The frame portion in which the concave surface for bending and the flat surface are mixed and arranged is along an intermediate line in the longitudinal direction or the lateral direction of the frame or a pair of axisymmetric lines sandwiching the intermediate line, so that two trays are used. One is used as the main body, and the other is turned upside down to form a lid, which is in the same position even when stacked, and functions as a hinge shaft that is more easily bent than the range in which the reinforcing recessed surface is provided. As a result, for example, when a tray for a rice ball is configured with a tray having a hinge shaft extending in the lateral direction of the frame along the intermediate line in the longitudinal direction of the frame as a lid and a main body, half of the tray sandwiching the hinge shaft is formed. Rigidity is enhanced by each reinforcing concave surface, and while maintaining the contact surface, the lid and the main body are integrally folded in half with the frame part where the bending concave surface and the flat surface are mixed and lined up as the hinge axis. Can be done.

Preferably, the bending concave surface is formed in a side view arc shape, and the reinforcing concave surface is formed in a side view angle shape. The bending concave surface of the frame portion constituting the hinge shaft has a side view arc shape that changes continuously to allow appropriate elastic deformation. The "side view arc shape" may be a curved surface that changes continuously, and includes a regular arc having a constant radius, an elliptical arc having a changing radius, and an irregular curved surface. The reinforcing concave surface of the other portion of the frame portion has a side view angle shape with an angle to increase the cross-sectional coefficient and increase the rigidity. The "side view angle shape" may be a curved surface as long as it has corners, and may have one or more corners. Usually, the side view table shape is suitable in consideration of die cutting.

According to the present invention, in a container for a sushi ball, in which one of the two trays is turned upside down and stacked as a lid, when the main body tries to bend due to the weight of the sushi ball, a concave surface for bending is formed. The lid and the main body can be made difficult to separate by bending the frame portion in which the flat surfaces are mixed and lined up as a hinge shaft and keeping the lid and the main body in contact with each other within the range where the reinforcing recessed surface is provided. In addition, since the frame portion where the concave surface for bending and the flat surface, which are the hinge axes, are lined up in a mixed manner, excessive bending is suppressed, the main body is prevented from being excessively bent and the container for rice balls is prevented from falling. To. In this way, the container for rice balls to which the present invention is applied is less careful when carrying it in the hand, is easier to handle, and makes the transportation of rice balls more secure and convenient.

It is a perspective view which shows an example of the tray which comprises the container for rice sushi balls to which this invention is applied. It is a top view of the tray of this example. It is a front view of the tray of this example. FIG. 2 is a cross-sectional view taken along the line AA in FIG. FIG. 2 is a cross-sectional view taken along the line BB in FIG. FIG. 2 is a cross-sectional view taken along the line CC in FIG. FIG. 2 is a sectional view taken along line DD in FIG. FIG. 5 is a cross-sectional equivalent view taken along the line AA of a container for rice balls, which is configured by stacking a lid on a main body containing rice balls. It is a BB cross-sectional equivalent view of the container for rice sushi rice which is formed by stacking the lid body on the main body which stored the rice sushi ball. It is a CC cross-sectional equivalent view of the container for rice sushi rice which is formed by stacking the lid body on the main body which stored the rice sushi ball. It is a DD cross-sectional equivalent view of the container for rice sushi rice which is formed by stacking the lid body on the main body which stored the rice sushi ball. It is a BB cross-sectional equivalent view of the sushi rice container which lifted the left and right ends and bent the center of the left and right downwards. It is a CC cross-sectional equivalent view of the container for rice sushi rice that lifted the left and right ends and bent the center of the left and right downwards. It is a DD cross-sectional equivalent view of the container for rice sushi balls that lifted the left and right ends and bent the center of the left and right downwards.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In the present invention, for example, as seen in FIGS. 1 to 3, the frame 21 which is a flat surface 211 having a substantially rectangular shape in a plan view is in the lateral direction of the frame 21 (from the lower left to the upper right in FIG. 1, and in the vertical direction in FIG. 2). ) Are arranged in a row by arranging five substantially rectangular storage portions 22 in the lateral direction, and in the longitudinal direction of the frame 21 (from the upper left to the lower right in FIG. 1 and in the horizontal direction in FIG. 2). This is applied to the tray 2 of the resin integrally molded product provided with a total of 50 storage portions 22 by arranging 10 rows of the storage portions 22. This example describes the tray 2 as the main body. The sushi ball container 1 is configured by stacking a tray 3 (see FIG. 8 and subsequent drawings) having a tray 2 turned upside down to form a lid on the tray 2.

The tray 2 of this example is a flat surface 211 of a frame portion where four storage portions 22 are butted, and a spherical convex portion having a fitting relationship at a line symmetric position sandwiching an intermediate line LML in the longitudinal direction of the frame 21. 23 and a spherical recess 24 are provided. Specifically, six spherical convex portions 23 are on the back side on the left side in the longitudinal direction of the frame 21, six stadium recesses 24 are on the front side on the left side, and six are on the back side on the right side in the longitudinal direction of the frame 21. The spherical concave portion 24 of the above is arranged, and six stadium convex portions 23 are arranged on the front side on the right side of the same. The spherical convex portion 23 and the spherical concave portion 24 of this example are also line-symmetrical positions sandwiching the intermediate line SML in the lateral direction of the frame 21. Further, the left and right spherical convex portions 23 and the spherical concave portions 24 are located at point-symmetrical positions at the center of the frame 21 in a plan view.

In the tray 2 of this example, in addition to the spherical convex portion 23 and the spherical concave portion 24, the linear convex portion 25 and the linear concave portion 26 extending in the longitudinal direction of the frame 21 from the left and right ends in the longitudinal direction of the frame 21 are formed in the frame 21. It is provided at a line-symmetrical position across the intermediate line LML in the longitudinal direction. Specifically, the outer peripheral frame portion of the frame 21 corresponding to the frame portion sandwiched between the storage portions 22 arranged in the longitudinal direction of the frame 21, and the four linear convex portions 25 on the left side in the longitudinal direction of the frame 21 are the frame 21. Four linear recesses 26 are arranged on the right side in the longitudinal direction of the above. The tray 2 as the main body and the tray 3 as the lid are aligned by fitting the spherical convex portion 23 and the spherical concave portion 24, and the linear convex portion 25 and the linear concave portion 26 are fitted to fit the frame 21. The deviation in the lateral direction is suppressed.

Most of the frame portion sandwiched between the adjacent storage portions 22 is formed on the reinforcing recessed surface 212 that is lowered from the flat surface. Since the storage portion 22 is substantially rectangular in plan view, reinforcing recessed surfaces 212 are formed on all sides. What are the reinforcing recessed surface 212 formed in the longitudinal direction of the storage portion 22 (the lateral direction of the frame 21) and the reinforcing recessed surface 212 formed in the lateral direction of the storage portion 22 (the longitudinal direction of the frame 21)? As seen in FIGS. 4 to 7, the side view table shape has the same depth lowered from the flat surface 211, only the length of the frame portion is different. The reinforcing recessed surface 212 in the shape of a side view table communicates with the adjacent storage portions 22, and facilitates picking of the rice balls 4 (see FIGS. 8 and later) stored in the storage portions 22. The tray 2 is integrated within the range where the reinforcing recessed surface 212 is provided, and is less likely to bend in the range.

A feature of the present invention is that the tray 2 has a hinge shaft that bends appropriately. The hinge shaft of this example has a bending recessed surface 213 formed in a part of a plurality of frame portions arranged along a pair of line symmetric lines LSL sandwiching an intermediate line LML in the longitudinal direction next to each other, and the frame portion. It is composed of a combination with a flat surface 211 left as it is in the rest. The frame portions arranged along the line symmetry line LSL are divided into five sections, which is the same number as the storage portions 22 arranged in the lateral direction of the frame 21. It is up to you how to allocate the flat surface 211 and the bending concave surface 213 to the plurality of frame portions. In the tray 2 of this example, the flat surface 211 of three divisions and the concave surface 213 for bending of two divisions are alternately arranged in the frame portion arranged along the line symmetry line LSL.

Since the flat surface 211 of the three divisions is a sheet-like resin surface arranged on the same plane as the frame 21, the frame portion arranged along the line symmetry line LSL is easily bent. As seen in FIGS. 4 to 7, the dented surface 213 for bending in the second section has a circular arc shape in the side view downward from the flat surface 211, forms a continuous curved surface without corners, and forms a line symmetry line LSL. The cross-sectional coefficient of the frame parts lined up along the line is increased to make it difficult to bend, while allowing a certain amount of deformation. The arcuate bending surface 213 communicates with the adjacent storage portions 22 to facilitate picking the rice balls 4 (see FIGS. 8 and later) stored in the storage portions 22. The tray 2 of this example constitutes a hinge shaft that bends appropriately along a pair of axisymmetric lines LSL that sandwich an intermediate line LML in the longitudinal direction next to each other.

In the rice bowl container 1, one of two trays 2 and 3 of the same type is used as a main body and the other is used as a lid, and as shown in FIGS. 8 to 11, the rice balls are stored in the storage portion 22 of the tray 2 as the main body. In the state where 4 is stored, the tray 3 as a lid is turned upside down and stacked. The tray 2 as the main body and the tray 3 as the lid are fitted with the spherical convex portions 23,33 and the spherical concave portions 24,34, the linear convex portions 25,35 and the linear concave portions 26,36, and the frame 21 , 31 flat surfaces 211 and 311 are brought into contact with each other (for convenience of explanation, a gap is drawn in the drawing). The rice ball 4 is stored and held in a space formed by combining the storage portions 22 and 33 of the tray 2 and the tray 3.

Since the frame portion constituting the hinge axis is along a pair of axisymmetric line LSLs sandwiching the intermediate lines LML in the longitudinal direction of the frames 21 and 31 next to each other, the tray used as the lid with respect to the tray 2 used as the main body. Even if 3 is turned upside down and stacked, it is in the same position and functions as a hinge shaft of the tray ball container 1. As a result, for example, when the left and right ends of the sushi ball container 1 in which the sushi balls 4 are stored are lifted in the storage portions 22 and 33, only the frame portion constituting the hinge shaft is appropriately lifted as shown in FIGS. Bend.

The flat surfaces 211 and 311 of the frame portion constituting the hinge shaft can be bent while maintaining the contact surface state (see FIG. 12). On the other hand, since the opposing bending recessed surfaces 213,313 are curved surfaces having an arc shape in a side view, they do not bend like the flat surfaces 211,311 and close the wall surface (the bending recessed surface 313 of the tray 3 as a lid) or. Only the deformation that opens the wall surface (the concave surface 213 for bending of the tray 2 as the main body) occurs, and the deformation is suppressed as the deformation increases (see FIG. 13). The reinforcing recessed surfaces 212 and 312 of the other frame parts are hardly deformed.

In this way, the container 1 for sushi balls with the left and right ends lifted has only the frame portion constituting the hinge shaft bent, and the range from the left hinge shaft to the left end divided into three by the hinge shaft, the range sandwiched between the hinge shafts, In the range from the right hinge shaft to the right end, the frames 21 and 31 are kept in contact with each other in the range where the reinforcing recessed surfaces 212 and 312 are provided, and the trays 2 and 3 are not removed. As a result, the sushi ball container 1 containing the sushi balls 4 can be carried by lifting the left and right ends without worrying that the tray 2 as the main body will fall or the tray 3 as the lid will come off. It can be handled easily.

Although a plurality of frame portions constituting the hinge shaft may be provided, it is preferable that the number of divisions of the frame 21 divided via the hinge shaft is small. However, if the frame portions forming the hinge shaft are in a single row, the load is concentrated too much and the hinge shaft is easily bent, and the trays 2 and 3 may be removed. From now on, it is preferable that the frame portion forming the hinge shaft has two rows as in this example. The two rows of hinge shafts disperse the load and suppress excessive deformation, and the contact state of the frames 21 and 31 divided into three restrains the separation from each other, so that the contact state is stable. It has the advantage of being preserved.

Although not shown, the hinge shafts may be provided in a plurality of frame portions arranged along a pair of line symmetric lines sandwiching the intermediate line SML in the lateral direction of the frame 21 or the intermediate line SML. In this case, when the front and rear ends of the rice bowl container 1 containing the rice balls 4 are lifted, the hinge shaft is bent to prevent the trays 2 and 3 from being removed. Further, the hinge shaft may be provided perpendicular to each of the longitudinal direction and the lateral direction of the frame 21. In this case, even if the left and right ends or the front and rear ends of the rice ball container 1 containing the rice balls 4 are lifted, it is possible to prevent the trays 2 and 3 from being removed by bending the hinge shaft.

1 Container for rice balls 2 Tray (main body)
21 frames
211 Flat surface
212 Reinforcing recessed surface (side view table shape)
213 Recessed surface for bending (side view arc shape)
22 Storage
23 Spherical convex part
24 Spherical recess
25 Linear convex part
26 Linear recess 3 Tray (lid)
31 frames
311 Flat surface
312 Reinforcing recessed surface (side view table shape)
313 Recessed surface for bending (side view arc shape)
32 storage
33 Spherical convex part
34 Spherical recess
35 Linear convex part
36 Linear recess 4 Rice ball
Longitudinal midline of LML frame
Midline of the SML frame in the short direction
LSL line symmetric line

Claims (2)

A resin in which a plurality of storage portions for rice balls are arranged side by side on a frame having a flat surface, and convex portions and concave portions having a mating relationship are provided at line-symmetrical positions sandwiching an intermediate line in the longitudinal direction or the lateral direction of the frame. In a container for rice balls whose main body and lid are integrally molded trays,
Of the frame part sandwiched between adjacent storage parts,
A part of a plurality of frame portions arranged along an intermediate line in the longitudinal direction or the lateral direction of the frame or a pair of line symmetric lines sandwiching the intermediate line is formed in a concave surface for bending lowered from a flat surface.
The flat surface of the rest of the frame portion is left as it is.
The other frame part is a container for rice balls, which is characterized by being formed on a recessed surface for reinforcement that is lowered from a flat surface. The container for rice balls according to claim 1, wherein the bending concave surface is formed in a side view arc shape, and the reinforcing concave surface is formed in a side view angle shape.

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