JPH11321838A - Dispensing tray - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make connecting sections of a dispensing tray having separating lines hard toa be deformed, improve yield, productivity and working efficiency, reduce the cost, and facilitate the separation of storage sections. SOLUTION: A number of recessed and projected faces are formed in the longitudinal direction of connecting sections 3 connecting a plurality of trays 2, and connecting sections 7 of separating lines 6 are formed on either recessed faces 5A or projected faces 5B and sections (side faces 5C) connecting the recessed faces 5A with the projected faces 5B are formed in a manner of being cut in the constitution of a dispensing tray 1. The moment force in proportion to the height between the recessed face 5A and the projected face 5B to the force in the up and down direction applied to the connecting sections 3 is received as the tension on the connecting sections 7 and also received as the facial pressure on the separating lines to enhance the rigidity, and the separation of storage sections 2 can be carried out easily by breaking the connecting sections 7 by the arrangement.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subdivision tray in which a plurality of small trays (accommodating portions) are connected in a separable manner.
In particular, the present invention relates to a food subdivision tray in which a concavo-convex surface such as a rib is formed at a connection portion between the trays.

[0002]

2. Description of the Related Art From a food manufacturer's point of view, it is necessary to prevent damage to a product (food), and to subdivide the food from the viewpoints of weighing management, handling in an automatic packaging device, and ease of transport in a distribution process. It is desirable that the connecting portion between the trays is not easily deformed. On the other hand, from the viewpoint of consumers, ease of handling is particularly required for storage and disposal. That is, in order to be able to compactly store unused food that has not been consumed at one time, usually, a part of the empty subdivision tray is separated and the remaining part is preserved. However, since the smaller the volume, the easier it is to handle, it is desired that the subdivision tray be easy to separate. in this way,
The subdivision tray is required to have a function of making the connecting portion hard to be deformed and easy to separate.

A conventional general subdivision tray will be described with reference to FIG. In this subdivision tray 1, three trays 2 arranged in series are arranged in two rows, these are integrally connected by a flat connecting part 3, and a perforation 4 is inserted in the flat connecting part 3, and the tray 2 It can be easily separated from the perforations 4. Further, a flange portion 3 ′ is formed on the upper peripheral edge of the plurality of trays 2 integrally connected by the connecting portion 3 where the connecting portion 3 is not formed so as to be flush with the connecting portion 3. .

[0004] The subdivision tray in which the perforations 4 are provided in the connecting portion 3 as described above is also disclosed in Japanese Utility Model Laid-Open No. 63-128915 and Japanese Utility Model Laid-Open No. 2-102319. Japanese Patent Application Laid-Open No. 8-337248 discloses a structure in which the trays 2 are connected by short connecting portions so that the trays 2 can be easily separated, as a structure similar to the perforation 4. Japanese Patent Application Laid-Open No. 8-337248 discloses a configuration in which the thickness of the perforation 4 is reduced in place of the perforation 4 in FIG.

[0005] In the above-mentioned conventional example, the perforations 4 and those similar to the perforations 4 are provided along the center line of the flat connecting portion 3 in FIG.
There are the following problems. That is, there is no problem with respect to the consumer's request in that the tray 2 can be easily separated from the perforation 4, but the contents are put into the tray 2 of the subdivision tray 1 and the subdivision tray 1 is lifted. At this time, the perforation 4 or a portion similar thereto becomes weak locally against bending force, the perforation 4 is bent, and sometimes the perforation 4 is broken.

When the perforations 4 are bent or broken, a problem arises for the producer. That is, if the perforation is bent or broken, the original shape of the subdivision tray 1 is damaged, and the contents stored in the tray 2 are damaged, and some of the products need to be discarded as commodities. Is reduced. On the other hand, when foods are stored in the subdivision trays 1 by the automatic filling machine, a large number of empty subdivision trays 1, which are not yet filled with food on the belt conveyor, are arranged in a state where they can contact the adjacent subdivision trays 1. Is done.
At this time, since the subdivision trays 1 come into contact with each other and the subdivision tray 1 located at the rear pushes the subdivision tray 1 located at the front, if the connecting portion 3 is easily deformed,
Subdivision tray 1 is bent from perforation 4. For this reason, there is a problem that the flow of work is obstructed and the productivity is reduced. In addition, there is a problem that in transporting in a distribution process, careful handling is required and the work efficiency is reduced. Furthermore, there is a problem that strict packing is required and the cost is increased.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to make the connecting portion of the subdivision tray difficult to deform and to make the separation of the tray easy, thereby improving the yield, which is a problem on the producer side, and improving the productivity. An object of the present invention is to provide a subdivided tray in which the tray is separated easily, which is a problem on the consumer side, and the handling thereof is satisfied.

[0008]

As a result of intensive studies, the above problem has been solved by forming an uneven surface to form a reinforcing rib in the connecting portion of the subdivision tray and limiting the position of the connecting portion of the separation line. It has been found that the present invention can be solved, and the present invention has been completed. That is, a plurality of trays for accommodating the contents are connected via a connecting portion, and in a subdivided tray formed by forming an intermittent separation line for separating each tray along the connecting portion, the connecting portion has a longitudinal section. Forming a large number of uneven surfaces in the direction, the intermittent separation line is formed in a straight line passing through the portion where the uneven surface is formed, and the uncut connection portion of the separation line is 2. The subdivision tray according to claim 1, wherein the separation line is provided on the concave surface and / or the convex surface, and the part connecting the concave surface to the convex surface is formed so as to be cut. 3.

Next, the invention of claim 2 is characterized in that the separation line is formed so as to be orthogonal to the side surface forming the concave surface or the convex surface in plan view.

Next, a third aspect of the present invention is characterized in that the connecting portions are provided alternately at appropriate positions on the concave and convex surfaces of the uneven surface.

The invention according to claim 4 is characterized in that the connecting portion is formed linearly, and the concavo-convex surface formed thereon has an upright surface formed on each adjacent side surface.

According to a fifth aspect of the present invention, the uneven surface is formed such that the sum of the lengths of the steps from the concave surface to the convex surface is one fifth or more of the total length of the connecting portion forming the uneven surface. It is characterized by.

Next, how the problem is solved by the above means will be described. First, in claim 1, a large number of concavo-convex surfaces are continuously formed in a longitudinal direction of a connecting portion connecting each tray, and a connecting portion of a separation line is provided on a concave surface and / or a convex surface, and a portion connecting the concave surface to the convex surface is provided. Is formed so as to be cut, so that the vertical force acting on the connecting portion receives a moment force proportional to the height between the concave surface and the convex surface as a tensile force at the connecting portion, and the separating line In this case, since it can be received as a surface pressure, the connecting portion is hardly deformed, and the connecting portion is provided on the concave surface and the convex surface, so that the tray is separated by breaking the connecting portion.

Next, in the second aspect, the separation line is formed so as to be orthogonal to the side surface forming the concave surface or the convex surface in a plan view, so that a vertical force acting on the continuous portion can be reduced. When the moment force is received as the surface pressure, the cut portion of the separation line can be reliably engaged.

In the third aspect, the connecting portions are alternately provided at appropriate positions on the concave surface and the convex surface of the uneven surface, so that the vertical force acting on the connecting portion can be dispersed in a well-balanced manner.

In the present invention, the connecting portion is formed linearly, and the uneven surface formed on the connecting portion has an upright surface formed on each adjacent side surface. In contrast, when the moment force is received as the surface pressure, the cut portion of the separation line can be reliably engaged.

According to a fourth aspect of the present invention, the total of the lengths of the steps from the concave surface to the convex surface is at least one-fifth of the total length of the connecting portion forming the uneven surface. By doing so, it is possible to ensure that the uneven surface has rigidity.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 4, a subdivision tray 1 according to the present invention has a plurality of trays 2 for storing contents connected by a connecting portion 3, and a flange portion 3 is provided on an outer periphery of the integrated tray 2 for further improvement in handling. 'Has been formed. In FIG. 4, since the upper peripheral shape of the tray 2 is quadrangular, the connecting portion 3 extends between the trays 2 and extends linearly in the left-right direction. And, in this connecting part 3, FIG.
As shown in FIG.
A concavo-convex surface formed by A, a concave surface 5B, and a side surface 5C connecting the two is provided continuously along the connecting portion 3. Also,
An intermittent separation line 6 is provided along the connecting portion 3 so that each tray 2 can be separated, that is, so as to traverse a row of the convex surface 5A to the concave surface 5B, and an uncut portion of the separation line 6 Are provided on the convex surface 5A and the concave surface 5B. The separation line 6 and the connection portion 7
It is formed by cutting the connecting portion 3 with a cutting blade so as to press the connecting portion 3 while leaving the connecting portion 7 at a predetermined length L3. The uneven surface referred to here includes one having a convex portion formed on a plane, one having a concave portion formed on a flat surface, and one having a concave portion formed simultaneously.

Next, an example in which the embodiment is further described in detail. FIGS. 2 and 3 are enlarged views of the convex surface 5A and the concave surface 5B in FIG. When the contents are put into the tray 2 of the subdivision tray 1 and one end of the subdivision tray 1 is lifted (supported at one end), as shown in FIG.
Occurs. Since there is a step H2 between the convex surface 5A and the concave surface 5B, and the side surface 5C is orthogonal to the plane passing through the separation line 6, the cut surfaces formed by the separation line 6 are opposed to each other, and the concave surface 5B A compressive force of F1.times.H2 = F2 acts on the separation line 6, and the connecting portion 7 is not cut by the tensile force F1, and
As long as the concave surface 5B and the side surface 5C do not buckle or deform,
The compressive force F2 is held by the concave surface 5B and the side surface 5C, and the concave surface 5B and the side surface 5C have a combined force necessary to hold the compressive force F2.

Next, the contents are put into the tray 2 of the subdivision tray 1 and, as shown in FIG.
When B and B are supported (both ends are supported), as shown in FIG. 3, a tensile force F1 is generated at the connecting portion 7 provided on the concave surface 5B. A step H2 is formed between the convex surface 5A and the concave surface 5B.
Therefore, the separation line 6 of the convex surface 5A has F1 × H2 = F2
Is applied, the connecting portion 7 is not cut by the tensile force F1, and the convex surface 5A is not buckled or deformed.
A holds this compressive force, and the convex surface 5
A has a rigidity necessary to hold the compressive force F2.

Strictly speaking, the compressive force F2 is equal to the step height H.
The separation line 6 from the separation line 6 'to the connection portion 7 in FIG.
Is actually dispersed as the surface pressure at
Compression force less than 2. In addition, the above equation F1 × H2
= F2 As is clear from the above, if the step H2 is increased, the uneven surface can have a large rigidity. However, if the compression force F2 is too large, the convex surface 5A and the concave surface 5B buckle or deform. Therefore, there is a limit in increasing the step H2.

As shown in FIG. 6, when a plurality of convex surfaces 5A and concave surfaces 5B formed along the connecting portion 3 are continuously provided, the above-mentioned compressive force F2 is reduced by the convex surface 5A and the concave surface 5B. Since the number of components is dispersed, the step H2 can be reduced. As a result of various changes in the size of the stepped portion H2, the sum of the sizes of the stepped portion H2 between the convex portion 5 and the concave portion 5 'constituting the rib is determined by the total length of the connecting portion 3 having the uneven surface. It is desirable to form the stepped portion H2 so as to be at least one-fifth of that described above.
It is preferably at least one-half. And it turned out that the limit should just be 2/3 or less.

On the other hand, the steps H2, the width W1 of the convex surface 5A, and the width W2 of the concave surface 5B shown in FIGS. 2 and 3 are limited from the surface of the processing for forming the separation line 6 and the connecting portion 7 on the uneven surface. . That is, when the separation line 6 is formed by the cutting blade after forming the uneven surface by press working, if the step H2 is too large, the step H2 may be deformed, and the width W1 of the convex 5A and Width W2 of concave surface 5B
Is too narrow, the convex surface 5A and the concave surface 5B may be deformed.

As described above, the rigidity with respect to the tensile force F1 is sufficient for determining the stepped portion H2, the convex surface 5A and the concave surface 5B are not buckled or deformed, and the separation line 6 can be machined. Must. Further, the number N of the convex surfaces 5A and the concave surfaces 5B must be determined so that the width W1 of the convex surface 5A and the width W2 of the concave surface 5B do not deform when the separation line 6 is formed. As an example that satisfies such a condition, H2 =
1.5t to 5t, and W1> 2.5H2 and W2
> 2.5H2 is desirable. Also, the connection part 7
The length L3 (see FIG. 1) may be a minimum length that does not break with respect to the tensile force F1. And the convex surface 5A and the concave surface 5B
In the case where a plurality of are provided continuously as shown in FIG. 6, the tensile force F1 acting on one connecting portion 7 is reduced because the tensile force F1 is also dispersed in that number. Accordingly, the length L3 of the connecting portion 7 can be reduced to facilitate separation of the tray 2. Specifically, the material thickness t is 1 to 2
In the case of mm, it is desirable that the length L3 of the connecting portion 7 is substantially equal to the material thickness.

In FIGS. 2 and 3, by providing the connecting portion 7 on the convex surface 5A and the concave surface 5B, the displacement of the abutting surface at the separation line 6 is eliminated, and the stepped portion H2 is formed.
Is provided, the convex surface 5A and the concave surface 5B are rigid, so that there is no displacement of the butting surface at the separation line 6. Therefore, the compressive force F2 can be reliably received as the surface pressure at the separation line 6, and the rigidity of the connecting portion 3 can be increased by the surface pressure of the separation line 6. Further, by providing the connecting portions 7 alternately on the convex surface 5A and the concave surface 5B, the connecting portion 3 when both ends A and B of the subdivision tray 1 are supported at both ends as shown in FIGS.
And the upward force acting on the connecting portion 3 when one side of the sub-distribution tray 1 is supported by hand, substantially the same rigidity can be maintained. At this time, as shown in FIG. 1, the connection portions 7 may be formed on all the uneven surfaces, or the connection portions 7 may be formed at appropriate intervals in consideration of the thickness and the material of the sheet material. Good. In the embodiment shown in FIG. 1, the partition wall 8 is not formed with an uneven surface as a reinforcing rib, but the partition wall 8 may be formed with an uneven surface in the same manner.

Next, the operation of the above embodiment will be described based on experiments. First, as an experimental example 1, an experiment on the rigidity of the subdivision tray 1 was performed. The specifications of the experiment are as follows. As shown in FIG. 4, the length L1 = 180 mm,
A polypropylene subdivision tray 1 having a width L2 = 125 mm, a depth H1 = 23 mm, and a subdivision tray thickness t = 0.5 mm was used. Then, small pieces each having a bite of cutlet of 30 grams are put into each tray 2 to support both sides A and B of the subdivision tray 1, forming a concavo-convex surface on the connecting portion 3 according to the present embodiment, and separating the longitudinal lines. 6 and a comparative example in which a flat connecting portion 3 was provided with perforations as in the prior art, the amount of deflection of the central portion C1 was measured.

As the uneven surface, the step H2 in FIG.
2 mm, W1 = 5 mm, W2 = 4 mm in FIG. 3, and P = 4.5 mm in FIG. 6, connecting portions 7 are provided on all the convex surfaces 5A and the concave surfaces 5B, respectively, and the length L3 = 0.
5 mm. As a comparative example, a subdivision tray having no uneven surface in the connecting portion 3 was used, and the connecting portion 3 was provided with perforations on a straight line as shown in FIG. This perforation was set to the same setting as in the present embodiment, with the length L3 of the connection portion being 0.5 mm and the length P of the cut portion being 4.5 mm. When the displacement .DELTA.H of the central portion C1 was measured, it was 13 mm when the connecting portion 3 was provided with an uneven surface, and was 25 mm when the connecting portion 3 was not provided with an uneven surface. Observation of the state of restoration of the subdivision tray 1 when a 30-gram piece of bitter cutlet was removed from the tray 2 revealed that the connection part 3 provided with an uneven surface was almost restored to its original state. On the other hand, in the case where the concavo-convex surface was not provided in the connecting portion 3, a clear broken line was formed along the perforation, and a bent shape was formed at two places.

As is evident from the results of the above experiment, there is a great difference in rigidity between the connecting portion 3 having the convex surface 5A and the concave surface 5B as the reinforcing rib and the one having no such uneven surface. It turns out that there is. The reason is that, as described with reference to FIG. 3, in the subdivision tray 1 in which the connecting portion 3 is provided with the convex surface 5A and the concave surface 5B as the reinforcing ribs, the weight of a bite cut 30g × 6 = 180g is added to the concave surface 5B. It is proved that the connection portion 7 provided receives the tensile force F1 and the surface pressure (compression force) F2 of the surface facing the separation line 6 formed on the convex surface 5A, and the flange portion 3 receives the rigidity force. It was revealed that they could be held.

Next, as an experimental example 2, a drop test of a frozen food was performed. The specifications of the subdivision tray 1 of the present example in which the concavo-convex surface was provided in the connecting portion 3 and the comparative example in which the unevenness surface was not provided were the same as those in the experimental example 1. And each tray 2
Each piece was cut into small pieces each having a bite of cutlet of 30 grams and frozen at minus 35 degrees Celsius, followed by vertical pillow packaging similar to that of a normal product, and sealed with 24 pieces of the tray 1 in a cardboard box for the product. After storing the two cardboard boxes at minus 20 degrees Celsius for 24 hours, 4
Nine drops were made from a height of 0 cm. The drop was made to fall from each of the three ridges of the cardboard box, and from six surfaces. After the drop test was completed, the package was unpacked and the subdivided tray was observed for damage.

As a result, in the present embodiment in which the uneven surface is provided on the flange surface 3, out of the 72 total separation lines 6 of the 24 subdivision trays 1, the connection portion 7 of one separation line 6 is used. Was confirmed to be partially broken. A close inspection of the unpacked items revealed no fragments of the subdivision tray from either of the two cardboard boxes. On the other hand, in the comparative example in which the concavo-convex surface is not provided in the connecting portion 3, out of the 72 perforations, 42 of the perforations have a broken portion of the connection portion, and 16 of the perforations have the connection portions. It was confirmed that all were broken. A close inspection of the unpacked items revealed seven pieces of the subdivision tray from the two cardboard boxes, and found seven breaks in the subdivision tray corresponding to the pieces.

As is clear from this frozen food drop experiment,
It can be seen that there is a clear difference in rigidity between the present example (FIG. 6) in which the connecting portion 3 is provided with the uneven surface and the comparative example (FIG. 9) in which the connecting surface 3 is not provided. The reason is that the impact force acting on the subdivision tray 1 when it falls down causes the tray 2 to swing up and down with the connecting portion 3 as a boundary, and the vertical force acts on the connecting portion 3 repeatedly. Such experimental results were obtained because the provision of the connecting portions 7 on the convex surface 5A and the concave surface 5B allows the subdivision tray 1 to have a rigid force against a downward force when both ends are supported, and the subdivision tray 1 to be cantilevered. This is because this experiment proved that the rigidity force against the upward force was almost the same.

Next, as an experimental example 3, an experiment was performed in which the connecting portion 7 was broken to separate the tray 2. The specifications of the subdivision tray 1 used in this example and the comparative example were the same as those of the experimental example 1. As an experiment method, a hand-shear test was conducted by 14 panels. Each panel was blindfolded, and the two types of subdivision trays were torn by hand along the separation line 7 or perforation, and those who felt easy to cut were selected. The order in which each panel tears the dispensing tray is 7
The person first towed the subdivision tray with the uneven surface (FIG. 6), and the other seven torn the reverse without the uneven surface (FIG. 9) first. As a result, those who chose to cut easily were the same number of sub-trays with uneven surfaces and those with no uneven surfaces.
People. The same result was obtained because the lengths of both the connecting portions were the same as 0.5 mm, and the connecting portions were provided on a straight line. It became clear that there was no relation to the uneven surface.

Next, as an experimental example 4, an experiment in which the arrangement of the connecting portions 7 was changed as shown in FIG. 7 was performed. As shown in FIG. 6, the purpose of this experiment is to compare the arrangement of the connecting portions 7 with those of Experimental Examples 1, 2, and 3 in which the connecting portions 7 were provided on all the convex surfaces 5A and the concave surfaces 5B. Is to make sure it affects you. Therefore, the specifications of the experiment are the same as those of the experimental example 1 except that the arrangement of the connection portions 7 is different. That is, as shown in FIG. 7, P1 at both ends of the connecting portion 3 was 4.5 mm, and P2 at the center was 9.5 mm. As a comparative example, FIG.
As shown in FIG. 7, the connecting portion 3 was provided with a convex surface 5A and a concave surface 5B, and the arrangement of the connecting portions 7 was adjusted to the arrangement of FIG. That is, P1 at both ends of the connecting portion 3 is 4.5 mm, and P2 at the center is 9.
The connecting portion 7 was formed at a position of 5 mm. Further, in the uneven surface shown in FIG. 10, the width W2 of the concave surface 5B = 3W1.
The connecting portion 7 at the center is provided on the concave surface 5B.

In this embodiment, when ΔH in FIG. 4 was measured, it was 14 mm.
The amount of deflection is increased by mm. The reason is that, as described with reference to FIG. 3, when the subdivision tray 1 is supported at both ends, a tensile force of F1 acts on the connecting portion 7.
This is because, when the connecting portion 7 is not provided in the first portion, the concave surface 5B opens at the part of the separation line 6. Observation of the state of restoration of the subdivision tray 1 at the time when a small piece of bite cutlet of 30 grams was removed from the tray 2 showed that it was almost restored to the original state. Therefore, it can be seen from the results of this experiment that the rigidity when the subdivision tray 1 is supported at both ends as shown in FIG. 4 greatly depends on the connecting portion 7 provided on the concave surface 5B.

In the comparative example, ΔH in FIG.
Was 22 mm when measured. This is shown in Experimental Example 1
Compared to the comparative example, the amount of bending is reduced by 3 mm, and the effect of the uneven surface is apparent in the comparison between FIG. 9 without the uneven surface and FIG. 10 with the uneven surface. Can be. In comparison with Experimental Example 1, when comprehensively determined, the width W1 of the convex surface 5A and the width W2 of the concave surface 5B are set to be substantially the same, and the convex surface 5A and the concave surface 5B
It can be seen that the higher the rigidity of, the smaller the amount of deflection ΔH. Further, in the comparative example, after the experiment was completed, the bite cut was removed from the tray 2 and the subdivision tray was observed. As a result, a clear broken line was formed along the separation line, and the connection portion was bent at two places. . Similarly, it can be seen that the resilience is better when the width W1 of the convex surface 5A and the width W2 of the concave surface 5B are substantially the same and the rigidity of the convex surface 5A and the concave surface 5B is increased.

Next, as an experimental example 5, a drop test of a frozen food was performed. The specifications of the subdivision tray used in this experiment are the same as those of the experimental example 4 in this example and the comparative example.
Then, put a small piece of 30g bite cutlet into the container,
After freezing at minus 35 degrees Celsius, vertical pillow packaging was performed in the same manner as a normal product, and 24 pieces of trays were arranged in a cardboard box for the product and sealed. And minus 2 degrees Celsius
After storing at 0 degrees for 24 hours, nine drops were made from a height of 40 cm. The drop was made to fall from each of the three ridges of the cardboard box, and from six surfaces. After the drop test was completed, the package was unpacked and the subdivided tray was observed for damage.

As a result, in the present embodiment (FIG. 7) in which the connecting portion 3 is provided with an uneven surface, out of the 72 total separating lines 6 of the 24 subdivided trays, the connection of two separating lines 6 is performed. It was confirmed that part of the portion 7 was broken. A close inspection of the unpacked items revealed no fragments from the subdivision tray.
On the other hand, in the comparative example (FIG. 10), out of the 72 separating lines, 37 connecting portions have broken portions, and 11 connecting lines have all broken portions. Was confirmed. A close inspection of the unpacked material revealed that four pieces of the subdivision tray were found, and four breakage points of the subdivision tray corresponding to the pieces were found.

As is clear from this frozen food drop experiment,
As shown in FIG. 7, the width W1 of the convex surface 5A and the width W of the concave surface 5B
It can be seen that there is a clear difference in rigidity between the case where the width W2 of the convex surface 5A is wider than the width W2 of the convex surface 5A, as shown in FIG. In FIG. 7, the connecting portions 7 provided at intervals of P2
Are alternately provided on the convex surface 5A and the concave surface 5B, respectively, whereas in FIG. 10, the connecting portion 7 'is provided only on the concave surface 5B. As described above, the difference in the experimental results between the present embodiment (FIG. 7) and the comparative example (FIG. 10) is that the impact force acting on the subdivision tray 1 when the tray falls and the tray 2 In the state where the vertical force is repeatedly applied to the connecting portion 3 by swinging up and down, as shown in FIG. 7, by providing the connecting portions 7 alternately on the convex surface 5A and the concave surface 5B, While the rigidity force with respect to the downward force when the subdivision tray 1 is supported at both ends and the upward force when the subdivision tray 1 is cantilevered can be substantially the same, in the case of FIG. Is considered to be due to the fact that a downward force (supported at both ends) can be received by the connecting portion 7 'but an upward force (supported at one end) cannot be received. Experiment 5 also proved that the provision of the connection portions 7 on the convex surface 5A and the concave surface 5B can provide a rigidity against the vertical force acting on the connecting portion 3.

Next, as an experimental example 6, an experiment was performed in which the connecting portion 7 was broken and the tray 2 was separated. The specifications of the subdivision tray 1 used in this example (FIG. 7) and the comparative example (FIG. 10) were the same as those of the experimental example 4. As a method of the experiment, a hand-shear test was conducted using 20 panels. Each panel was blindfolded and the two types of subdivision trays were torn by hand along the separation line 7 and the person who felt it was easy to cut was selected. The order in which each panel tears the dispensing tray is 1
0 persons tossed the subdivision tray of this example (FIG. 7) first, and the remaining 10 persons tore the opposite comparative example (FIG. 10) first. As a result, it was selected that the cut-out tray was easy to be cut, because the small-sized tray of the present example and the small-sized tray of the comparative example had the same number of 10 pieces.
People. The same result was obtained because the length L3 of the connection portion was the same as 0.5 mm in both cases and the connection portion 7 was provided on a straight line. In addition, it became clear that the ease of disconnection of the connection portion was not related to the uneven surface.

Next, as an experimental example 7, an experiment of rigidity was performed using the subdivision tray 1 shown in FIG. This subdivision tray 1 is obtained by connecting four trays 2 by a connecting portion 3, and its specifications are as follows. L1 = 170m
m, L2 = 135 mm, t = 0.5 mm, H1 = 30 m
m and the material is polypropylene. The connecting portion 3 has a convex surface 5A and a concave surface 5B shown in FIG. 8, and the central portion is provided with the connecting portion 7 only on the concave surface 5B (this embodiment). 11 (Comparative Example 1), and as shown in FIG. 11, the connecting portion 3 was provided at the same interval as that of the present embodiment without providing an uneven surface on the connecting portion 3 (Comparative Example 2). An experiment was conducted for each of the three types.

The arrangement of the connecting portion 7 is shown in FIGS.
1, the end P1 of the subdivision tray 1 = 4.4 mm,
P2 = 9.4 mm, length L3 of connection part 7 = 0.5 m
m. Then, 60 grams of macaroni gratin was placed in each of the four trays 2, supported by A and B as shown in FIG. 5, and the displacement .DELTA.H of the central portion C1 was measured. The results were as follows. First, in the subdivision tray 1 of this embodiment (FIG. 8), the displacement .DELTA.H of the central portion C1 is 17 m.
m, the displacement amount ΔH of the central portion C1 of the subdivision tray 1 (Comparative Example 1) in which nothing is provided in the connection portion 3, and the subdivision tray 1 in which the connection portions 7 are provided in the connection portion 3 in the arrangement shown in FIG.
In Comparative Example 2, the displacement amount ΔH of the central portion C1 was 28 mm. Also, when the state of restoration of the subdivision tray 1 when 60 grams of macaroni gratin was removed from the tray 2 was observed, the present embodiment and Comparative Example 1 were almost restored to the original state. In Example 2, a clear line was formed along the perforation, and the shape was bent at the center.

As is clear from the results of the above experiment, as shown in FIG. 8, an uneven surface is formed on the flange surface and the concave surface 5B is formed.
It can be seen that the one provided with the connecting portion 7 has higher rigidity than the comparative example 1 in which nothing is provided on the flange portion. The reason is that by providing an uneven surface on the connecting portion 3, the connecting portion 3
As described with reference to FIG. 3, a downward force when supporting both ends of the subdivision tray 1 is received as a tensile force at the connection portion 7 provided on the concave surface 5B, and the convex surface 5A receives the downward force. This is because the pressure is received as the surface pressure at the separation line 6. Further, the restoring force is the same in both the present embodiment and the comparative example 1 because both have a rigidity in the connecting portion 3 to the extent that no permanent distortion occurs. This is because the concentrated bending stress acts on the connecting portion 7 and the rigidity of the connecting portion 3 becomes low, and permanent deformation occurs in the connecting portion 7.

Next, as an experimental example 8, a drop test of a frozen food was conducted. The specifications of the subdivision tray 1 used in this example and the comparative example 2 were the same as those of the experimental example 7. In Experiment 8, the subdivision tray of Comparative Example 1 in Experiment 7 was not performed. Then, a small piece of macaroni gratin of 60 grams is put in the tray 2, frozen at minus 35 degrees Celsius, and then subjected to vertical pillow packaging similar to that of a normal product, and 20 pieces of the tray 1 are arranged in a cardboard box for the product and sealed. Did. Then, after storing for 24 hours at minus 20 degrees Celsius, nine drops were made from a height of 40 cm. The drop was made to fall from each of the three ridges of the cardboard box, and from six surfaces. After the drop test was completed, the package was unpacked and the subdivided tray was observed for damage.

As a result, in this embodiment (FIG. 8),
It was confirmed that, out of 40 total separation lines 6 of the 20 divided trays, a part of the connection portion 7 of the four separation lines 6 was broken. A close inspection of the unpacked items revealed no fragments from the subdivision tray. On the other hand, Comparative Example 2
In FIG. 11, it was confirmed that out of the forty separation lines, 20 of the separation lines had broken connection portions, and that the connection portions of nine of the separation lines were all broken. A close inspection of the unpacked material revealed that four pieces of the subdivision tray were found, and four breakage points of the subdivision tray corresponding to the pieces were found.

In this drop test of the frozen food, when compared with the test example 2, the breakage of the connecting portion 7 was caused by the test example 8.
It turns out that there is much more. The reason is that in the experimental example 2, the connecting portion 3 is provided with the connecting portion 7 on each of the convex surface 5A and the concave surface 5B of the uneven surface shown in FIG. On the other hand, the connecting portion 3 of the experimental example 8 has the concave surface 5 of the uneven surface shown in FIG.
B is provided with a connecting portion 7 only, and a rigid force with respect to a downward force is received as a tensile force of the connecting portion 7, but with respect to an upward force, the separation line 6 of the convex surface 5A is opened and the concave surface 5B is formed. This is because the provided connection portion 7 acts as concentrated bending stress.

In this experimental example 8, the rigidity of this example is higher than that of comparative example 2. The reason for this is explained in FIG. 3 in the present embodiment, and as is clear from comparison with Experimental Example 2 above, the rigidity is high for the downward force, whereas the connecting portion 3 is This is because the vertical force acting on the connecting portion 7 repeatedly acts as concentrated bending stress. Further, as shown in FIG.
An experiment was conducted on the case where the connecting portion 7 was provided, and the same result was obtained when the connecting portion 7 was provided on the convex surface 5A side.
It is clear for the above technical reasons.

Next, as an experimental example 9, an experiment was performed in which the connecting portion 7 was broken to separate the tray 2. Subdivision tray 1
In this example (FIG. 8) and the comparative example (FIG. 11), the same data as those in Experimental Example 7 were used. As a method of experiment, 16
An experiment of hand-shearing with a human panel was performed. Each panel was blindfolded, and the two types of subdivision trays were torn by hand along the separation line 6 by hand, and those who felt easy to cut were selected. The order in which each panel tears subdivision tray 1
Eight of them split the tray 1 of this example (FIG. 8) first, and the remaining eight split the tray of Comparative Example 2 (FIG. 11) first. As a result, the same number of persons who chose to cut easily were the same number of persons in the subdivision tray 1 of the present example and the subdivision tray 1 of Comparative Example 2. The same result was obtained because the lengths L3 of the connecting portions 7 were both equal to 0.5 mm and the connecting portions 7 were provided on a straight line. However, it became clear that the easiness of cutting of the connection portion 7 was not related to the uneven surface.

[0048]

As described in detail above, according to the first aspect of the present invention, the concavo-convex surface is formed on the connecting portion, and the connecting portion of the separation line is provided on one of the concave surface and the convex surface. Therefore, for the vertical force acting on the connecting part, a moment force proportional to the height between the concave surface and the convex surface is received as a tensile force at the connecting part and as a surface pressure at the separating line. Therefore, the connecting portion is less likely to be deformed.
Further, separation of the accommodating portion is easy because only the connection portion needs to be broken. Therefore, while improving yield, improving productivity, improving work efficiency and reducing costs, which are problems on the producer side, it is also easy to separate the accommodating portion, which is a problem on the consumer side, and simultaneously satisfy the handling. It can be made into divided trays.

In the second aspect, the separation line is formed so as to be orthogonal to the side surface forming the concave surface or the convex surface in a plan view, so that a vertical force acting on the connecting portion can be reduced. When receiving the moment force as the surface pressure, the cut portion of the separation line can be reliably engaged, so that the connecting portion is more difficult to deform. Other effects are the same as those of the first aspect.

According to the third aspect of the present invention, the connecting portions are alternately provided at appropriate positions on the concave and convex surfaces of the uneven surface, so that the vertical force acting on the connecting portion can be dispersed in a well-balanced manner. Therefore, the connecting portion is less likely to be deformed. Other effects are the same as those of the first aspect.

According to the fourth aspect, the connecting portion is formed linearly, and the uneven surface formed on the connecting portion is formed with an upright surface on each adjacent side surface. On the other hand, when the moment force is received as the surface pressure, the cut portion of the separation line can be reliably engaged, so that the deformation of the connecting portion can be more effectively prevented. Other effects are the same as those of the first aspect.

According to a fifth aspect of the present invention, the sum of the lengths of the steps from the concave surface to the convex surface is limited to one fifth or more of the total length of the connecting portion forming the concave and convex surface. The effect of dispersing the moment force provided by the connecting part of the wire break is ensured, and the connecting part is hardly deformed. Other effects are the same as those of the first aspect.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of an embodiment of the present invention.

FIG. 2 is a perspective view showing a main part of FIG.

FIG. 3 is a perspective view showing a main part of FIG. 1;

FIG. 4 is a perspective view of a subdivision tray used in an experiment.

FIG. 5 is a perspective view of a subdivision tray used in an experiment.

FIG. 6 is a schematic view illustrating an example of a concave-convex surface according to the present invention.

FIG. 7 is a schematic view showing an example of a concave-convex surface according to the present invention.

FIG. 8 is a schematic view showing an example of the uneven surface according to the present invention.

FIG. 9 is a schematic view showing a separation line of an experimental comparative example.

FIG. 10 is a schematic view showing a separation line of an experimental comparative example.

FIG. 11 is a schematic view showing a separation line of an experimental comparative example.

FIG. 12 is a perspective view of a conventional subdivision tray.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Subdivision tray 2 Tray 3 Flange part 4 Perforation 5A Convex surface 5B Concave surface 5C Side surface 6 Separation line 7 Connection part 8 Partition wall

Claims (5)

[Claims] 1. A subdivision tray in which a plurality of trays for storing contents are connected via a connecting portion and an intermittent separation line for separating the trays is formed along the connecting portion. A large number of uneven surfaces in the longitudinal direction thereof, the intermittent separating line is formed in a straight line passing through the portion where the uneven surface is formed, and the uncut connection portion of the separating line is A subdivision tray provided on a concave surface and / or a convex surface of the concave and convex surface, and wherein the separation line is formed such that a portion connecting the concave surface to the convex surface is cut. 2. The subdivision tray according to claim 1, wherein the separation line is formed so as to be orthogonal to a side surface forming the concave surface or the convex surface in a plan view. 3. The subdivision tray according to claim 1, wherein the connecting portions are alternately provided at appropriate positions on the concave surface and the convex surface of the uneven surface. 4. The connecting portion according to claim 1, wherein the connecting portion is formed linearly, and the uneven surface formed on the connecting portion has an upright surface formed on each adjacent side surface. Subdivision tray. 5. The uneven surface is such that the sum of the lengths of the steps from the concave surface to the convex surface is 1/5 of the total length of the connecting portion forming the uneven surface.
2. The method as set forth in claim 1, wherein:
5. The subdivision tray according to any one of items 1 to 4.