JP4718794B2 - Wireless cardboard cases - Google Patents

Description

The present invention relates to a wireless corrugated cardboard case that is folded from a single corrugated cardboard into a substantially rectangular parallelepiped shape. Specifically, the lid part is easy to close, and once the object is put in, the lid does not come off easily, and it can be filled in one box according to the degree of growth of fruits and vegetables. The lid has been devised so that it can be expanded outwards, while the bottom is wireless so that you can reliably eliminate problems such as loss of shape due to loss of shape or the weight of the objects inside. Related to cardboard cases.

When folding the corrugated cardboard, the wire of the fastener is often used to maintain the post-packing posture. On the other hand, there are the following examples of cardboard cases that maintain the packaging posture without using wires.

The present applicant has previously proposed an invention for a wireless cardboard case (Patent Document 1).

Japanese Patent Application No. 2002-345439

The above-mentioned Patent Document 1 makes a proposal as described below. That is, the wireless corrugated cardboard case is folded from a single corrugated cardboard into a box shape, and includes a lid portion and a bottom portion in which a plurality of pieces are bent, and a peripheral wall integrally connected thereto. The lid part is integrally connected to the lid surface pieces to form a lid part. Then, the fitting piece is fitted into the fitting notch, and the lid is closed by pushing up the fitting piece with the tongue piece. On the other hand, bottom pieces are integrally connected to the bottom and locked together to form the bottom. And it is comprised so that a fitting piece may be latched by the latching hole and a bottom part may be closed.

However, the above-mentioned proposal of Patent Document 1 has the following problems.

That is, the first problem is that the locking strength between the mating pieces at the bottom is not sufficient, so when heavy fruits and vegetables are put, the locking part may come off and the bottom may come off. Further, depending on the weight of the inside, the cardboard case may be twisted and deformed, and eventually the box collapses.

Secondly, when multiple fruits and vegetables with different growth degrees and different sizes are put in a cardboard case, the lid pieces may not be sufficiently locked or cannot be locked. The capacity of the cardboard case could be changed accordingly.

Therefore, in view of the above circumstances, the present invention has been devised to improve the locking strength of the bottom part and to spread the lid part outwardly even if a plurality of fruit and vegetables having different sizes depending on the degree of growth. An object of the present invention is to provide a corrugated cardboard case in which the lid can be locked in multiple stages according to the size of the cardboard.

In order to achieve the above object, according to the first aspect of the present invention, the lid portion 10 is continuously provided with the lid surface pieces 11, 12, 13 and 14, and the peripheral wall portion 30 is provided with the peripheral wall surfaces 31, 32, 33 and 34. The bottom 40 has a substantially rectangular parallelepiped shape from one cardboard 100 in which bottom pieces 41, 42, 43 and 44 are continuously provided, and the lid 10, the peripheral wall 30 and the bottom 40 are vertically provided. The bottom piece 42 is provided with a fitting concave portion 46 and the bottom piece 44 is provided with a fitting convex portion 47 so that the bottom piece 42 is locked to the bottom piece 44, and then the bottom piece In the corrugated cardboard case in which the pieces 41 and 43 are locked to the bottom pieces 42 and 44, the bottom pieces 42 and 44 are provided with a right-angled triangular tongue piece 45, and the bottom pieces 41 and 43 have a fold line H, respectively. Through the bottom And the bottom piece 41a and the bottom piece are formed in a trace formed by bending the tongue piece 45 from the position of the crease K to the inside of the cardboard case 200. While folding 43a from the position of the fold line H into a mountain shape, it is fitted along the curved line cut Y, the bottom piece 41a and 43a are engaged with the engagement hole 49, and the cover piece 13 Is provided with a cover surface piece 13b through a fold line L, and an engagement piece 20 is provided continuously through an end of the cover surface piece 13b through a crease M, and the engagement piece 20 is provided with an engagement groove 21; The peripheral wall surface 32 is provided with a cover 37 through a crease N, and is provided with a corner portion 38 at an upper portion thereof, so that the locking piece 20 is fitted inward of the cardboard case 200, and the locking groove 21 is formed. Corrugated cardboard locked to the corner 38 The tongue piece 45 is provided with the fold line K on the line of the cut line Z, and the tongue piece 45 is configured to be folded inward of the cardboard case 200 from the position of the fold line K. K is a cardboard case characterized in that it is half the combined length of the cut line Z and the fold line K or an appropriate length. The invention of claim 2 is a corrugated cardboard case, in addition to the above feature of the invention of claim 1, wherein the locking piece 20 is provided with one or a plurality of the locking grooves 21.

Here, the “wireless corrugated cardboard case” referred to in the present specification refers to a substantially rectangular corrugated cardboard 100 having a lid portion, a peripheral wall portion, and a bottom portion that are continuously provided via a fold, and is folded along the crease, A cardboard case having a substantially rectangular parallelepiped shape that locks the portion, the peripheral wall portion, and the bottom portion, and does not use the wire of the stopper metal to maintain the posture when the cardboard is folded up.

According to the wireless corrugated cardboard case according to the present invention, the lid portion is easy to close, and once the object is put in, the lid does not easily come off. Can be packed in a box. On the other hand, since the contrast strength of the bottom portion has been increased by 20% or more, it is possible to surely eliminate problems such as loss of shape and removal of the bottom due to weight when the object is put inside.

Embodiments of the present invention will be specifically described below based on the embodiments of the present invention illustrated in the accompanying drawings.

First, Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 is a development view of a corrugated cardboard case 200 of the present embodiment, which is a corrugated cardboard 100. FIG. 2 is a perspective view showing a state in which two bottom pieces are locked while the bottom is closed. FIG. 3 is a perspective view showing a state in which three bottom pieces are locked while the bottom is being closed. FIG. 4 is a perspective view of the same as above, with the bottom closed. FIG. 5 is a perspective view showing a state in the middle of closing the lid part.

Since the cardboard 100 having a substantially rectangular shape is provided with a plurality of folds at predetermined locations, how to provide them will be described below. As shown in FIG. 1, the corrugated cardboard 100 is divided into a lid part 10, a peripheral wall part 30, and a bottom part 40 in the vertical direction along a crease in the horizontal direction. The vertical and horizontal directions of the cardboard 100 are as described above, and the same applies to other examples. The dotted line in the figure indicates the crease, and the same applies to the other embodiments. A crease A is provided in the left-right direction from the top so that it is divided into a cover part, a peripheral wall part, and a bottom part in the vertical direction, a crease B parallel to this, and two creases G in the lid part 10 in parallel to these. And the bottom 40 is provided with two folds H. The second peripheral wall 30 is provided with folds C, folds D, folds E, and folds F in parallel from the left in the direction perpendicular to the folds. The first-stage lid portion 10 is divided into left and right lid surface pieces 11, 12, 13 and 14 through a cut line, and the lid surface piece 12 is divided into upper and lower lid surface pieces 12a and 12b through a fold line G. The cover surface piece 14 is divided into cover surface pieces 14a and 14b up and down via the crease G. The lid surface pieces 11 and 13 are provided with tongue pieces 15 on the left and right sides, and the tongue pieces 15 bend inward from the position of the fold line J along the continuous cut lines S, T, U and V. Here, the cut line U has an arc shape, and the contour of the tongue piece 15 has a substantially right triangle shape as shown in the figure. This right triangle is composed of two straight sides sandwiching a right angle and a hypotenuse of a concave curve, and a crease J is provided on one side sandwiching the right angle. A locking hole 16 is formed at the tip of the trace where the tongue piece 15 is bent inward along the cut line. Further, the upper end portions of the lid surface pieces 12 and 14 are respectively provided with two left and right engaging holes 17. The second-stage peripheral wall portion 30 is divided into peripheral wall surfaces 31, 32, 33, and 34 on the left and right sides through folds. The right end is a paste margin piece 35. The peripheral wall surfaces 31 and 33 are provided with finger holes 36. The bottom 40 of the third stage is divided into bottom pieces 41, 42, 43 and 44 on the left and right through the cut line, and the bottom piece 41 is divided into bottom pieces 41a and 41b on the top and bottom through the fold line H. 43 is divided into bottom pieces 43a and 43b vertically through a fold line H. The bottom pieces 42 and 44 are provided with tongue pieces 45 on the left and right sides, and the tongue pieces 45 are bent from the position of the fold K to the inside of the case along the continuous cuts W, X, Y and Z. Here, the cut line Z constituting the tongue piece 45 is parallel to the crease B on the bottom sides of the peripheral wall surfaces 32 and 34. However, the tongue piece 45 is pushed inward of the case by the bottom piece 41a and 41b with the crease K as a fulcrum. It is only necessary to have a function of swinging up and down. Therefore, the cut Z is not necessarily parallel, and may be inclined about 30 degrees with respect to the crease B. The crease K is provided on the line of the cut line Z, and the length of the fold line K can be half of the total length of the cut line Z and the fold line K or about an appropriate 80%. The same applies to the other embodiments. Further, the curve cut Y shows an arc shape, and the outline of the tongue piece 45 follows a substantially right triangle as shown in the figure. This right triangle is composed of two straight sides sandwiching a right angle and a hypotenuse of a concave curve, and has a crease K on one side sandwiching the right angle. A locking hole 49 is formed at the tip of the trace where the tongue 45 is bent inward along the cut line. Further, the bottom piece 42 is provided with a fitting concave portion 46, and the bottom piece 44 is provided with a fitting convex portion 47. The bottom end pieces 41 and 43 are respectively provided with two left and right engaging holes 48 at the upper ends thereof. About the bottom part 40, it is the same structure also about another Example.

The configuration in which the lid surface pieces 11 and 13 of the upper part 10 are provided with tongue portions 15 having a substantially right triangle shape, the cut U is formed in an arc shape, and the lid surface pieces are fitted and locked along the cuts is implemented. This is an example feature. Similarly, the bottom surface pieces 42 and 44 of the bottom portion 40 are provided with tongue portions 45 having a substantially right triangle shape, a curved cut Y is formed in an arc shape, and the bottom piece is fitted and locked along the cut. With respect to the bottom, it is a feature for all embodiments of the present invention.

The corrugated cardboard 100 has the above configuration, and the procedure for folding it will be described below.

First, it is folded up from the peripheral wall part 30. From the position of the creases C to F, the peripheral wall surfaces 31 to 34 are bent so as to surround the square, and finally the glue margin piece 35 is glued to the inner front end portion of the peripheral wall surface 31 to complete the folding of the peripheral wall portion 30.

Next, the bottom 40 is folded up. The bottom piece 44 is bent 90 degrees or more inward from the position of the crease B, and then the fitting recess 46 is fitted from the top while the bottom piece 42 is bent 90 degrees or more inward from the position of the crease B. Lock to the portion 47. As shown in FIG. 2, the center portion of the bottom portion 40 is inclined and recessed. Next, while the bottom piece 41 is folded in a mountain shape from the position of the crease H, both ends of the front bottom piece 41a are fitted into the inside of the case along curved cut lines Y on both sides. At this time, the bottom piece 41a is fitted on the tongue piece 45 while sliding inward of the case, and finally the locking hole 48 collides with the locking hole 49 and locks. FIG. 3 shows a state in which the bottom piece 41 is closed in this way. Similarly, FIG. 4 shows a state in which the bottom 40 on the opposite side is locked and the bottom 40 is closed. The central portion of the bottom portion 40 is in a state of being inclined and recessed. When the bottom piece 42 and 44 direction of the cardboard case 200 is the front-rear direction and the bottom piece 41 and 43 is the left-right direction, the bottom piece 42 is locked to 44 in the front-rear direction of the bottom 40 and further from the top to the bottom in the left-right direction. The piece 41 is locked to the bottom pieces 42 and 44, and the bottom piece 43 is locked to the bottom pieces 42 and 44.

Finally, the lid 10 is folded up. First, the lid surface piece 13 is bent 90 degrees or more inward from the position of the fold A, and then the bottom piece 11 is bent 90 degrees or more inward from the position of the fold A from the opposite side. Next, while the lid surface piece 14 is folded in a mountain shape from the position of the crease G, both ends of the front lid surface piece 14a are fitted into the inside of the case along curved cut lines U on both sides. At this time, the lid surface piece 14 a is fitted on the tongue piece 15 while sliding inward of the case, and finally the locking hole 17 collides with the locking hole 16 and locks. FIG. 5 shows a state in which the lid surface piece 14 is closed in this manner. Similarly, the cover surface piece 12 on the opposite side is locked. When the cover surface pieces 12 and 14 of the cardboard case 200 are the front and rear directions and the bottom surface pieces 11 and 13 are the left and right directions, the cover surface pieces 12 and 14 are locked to the cover surface pieces 11 and 13 in the front and rear direction of the cover portion 10. To do. As for the direction of the cardboard case 200, the direction of the lid 10 and the bottom 40 is the vertical direction, and the same applies to the other embodiments.

As described above, the cardboard 100 is folded up to the cardboard case 200, and the operation will be described with reference to FIGS.

The bottom piece 42 is locked to 44 in the front-rear direction of the bottom 40 of the cardboard case 200, and the bottom pieces 41 and 43 are locked from above. In the process of locking the bottom pieces 41 and 43, the operation of the tongue piece 45 will be described. The tongue piece 45 having a substantially right triangle shown in FIG. 3 is pushed and bent by the bottom face pieces 41 and 43 inward from the left and right. At this time, the tongue piece 45 bends inward from the position of the crease K, and a curved cut Y is formed in the bottom piece 42 and 44 at this trace. The curved cut Y is formed in an arc shape, while the tongue piece 45 is pushed and bent from the position of the fold K to the inside of the case, so that a gap is formed between the curved cut Y and the tongue piece 45. For this reason, the bottom piece 41 and 43 are easily fitted along the gap between the curved cut Y and the tongue piece 45, and are fitted and locked while sliding inward from the case while being folded into a mountain shape from the position of the fold line H. After the bottom piece 41 is locked, it is pressed from the inside of the case by the tongue piece 45, so that it is difficult to come off once locked. The same applies to the engagement of the bottom piece 43 on the opposite side. On the other hand, both end portions 41c and 41d (shown in FIGS. 2 and 3) of the bottom piece 41 are fitted from the peripheral wall pieces 32 and 34 while being biased toward the inside of the case. After the bottom is closed, both ends 41c and 41d of the bottom piece 41 are in a state of being biased from the peripheral wall surface, so that the cardboard case 200 is prevented from being twisted against the load from the side. There is. The same applies to the opposed bottom piece 43. When the cardboard case to be actually used is turned upside down, the bottom piece 42 and the bottom piece 44 in the front-rear direction of the cardboard case are engaged from the inside by the weight of the fruits and vegetables put in the cardboard case. Finally, the corners 46a and 46b (shown in FIG. 1) on both sides of the fitting recess 46 are engaged with the corners 47a and 47b (shown in FIG. 1) of the fitting projection 47. The heavier the fruits and vegetables put in, the stronger the degree of locking of the four bottom pieces, and the locking strength of 20% or more compared with the conventional one can be obtained. As described above, the locking action of the bottom piece is the same for the other embodiments.

Next, the locking of the lid surface piece will be described. FIG. 5 shows a state where the lid surface piece 14 is locked. Since the curved cut line U is formed in the arc shape in the lid surface pieces 11 and 13, the lid surface piece 14 is folded into a mountain shape from the position of the fold line G, and the gap formed by the curved cut line U and the tongue piece 15. Then, the locking hole 17 is locked to the locking hole 16 when it is fitted while sliding. The same applies to the locking of the other lid surface piece 12. In this case, even if fruits and vegetables having different sizes such as radishes are placed, the front and back cover pieces can be expanded while sliding up and down, so that the lid can be locked according to the size of the fruits and vegetables.

Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a development view of the cardboard case 200 of the present embodiment, which is a cardboard 100. FIG. 7 is a perspective view showing a state in the middle of closing the lid portion. FIG. 8 is a perspective view of the state before the locking piece is locked. FIG. 9 is an enlarged perspective view in the middle of locking the locking piece. FIG. 10 is a perspective view of the state after the locking piece is locked, as in the above.

The main difference between the present embodiment and the first embodiment is that the lid surface piece folding method and the lid surface piece locking means are different.

As shown in FIG. 6, the substantially rectangular corrugated cardboard 100 is divided into the lid part 10, the peripheral wall part 30, and the bottom part 40 in the vertical direction through a plurality of folds in the horizontal direction. It is the same. The crease A is provided in the left-right direction from the top so that the lid part, the peripheral wall part and the bottom part are divided into three in the vertical direction, the crease B is parallel to the crease A, and the two creases H are parallel to these at the bottom 40. Prepare. The second peripheral wall 30 is provided with folds C, folds D, folds E, and folds F in parallel from the left in the direction perpendicular to the folds. The first-stage lid portion 10 is divided into lid surface pieces 11, 12, 13, and 14 on the left and right sides through the cuts. The lid surface piece 13 is divided into lid surface pieces 13a and 13b through oblique creases L. Then, a locking piece 20 is connected to the left end portion of the lid surface piece 13b via a crease M, and the locking piece 20 includes locking pieces 20a and 20b. The lid surface pieces 11, 12, and 14 have a shape in which one or both corners are dropped so that they can be easily folded when the lid portion is closed. The second-stage peripheral wall portion 30 is divided into peripheral wall surfaces 31, 32, 33, and 34 on the left and right sides through folds. The right end is a paste margin piece 35. The peripheral wall surfaces 31 and 33 are provided with finger holes 36. The peripheral wall surface 32 is provided with a cover 37 via a crease N on the upper right. In addition, a corner portion 38 is provided in the vicinity of the crease A above the cover 37. The corner portion 38 is located on the upper side of the cut hole of the trace of the cover 37 being bent. The bottom 40 of the third stage is exactly the same as that of the first embodiment such as the fold line H and the tongue piece 45.

A feature of the present embodiment is that the lid surface piece is angled to facilitate folding of the lid surface piece of the lid portion 10 and the lid surface piece is locked in two stages.

The corrugated cardboard 100 has the above-described configuration, and a procedure for folding and closing the lid surface portion 10 different from the first embodiment will be described below.

As in the first embodiment, the lid surface portion 10 is folded after being folded from the peripheral wall portion 30 and then the bottom portion 40 is folded. First, the lid surface piece 13 is bent 90 degrees inward from the position of the crease A. Next, the lid surface piece 14, the lid surface piece 11, and the lid surface piece 12 are sequentially bent clockwise so that the corners of the lid surface piece are covered with the corners of the lid surface piece that is folded immediately before. Here, the lid surface piece can be easily folded by the corner drop applied to the cover surface piece. Finally, when the lid surface piece 12 is folded, as shown in FIG. 7, the lid surface piece 12b is folded outward from the position of the crease L (shown in FIG. 6) of the lid surface piece 13 to thereby close the lid surface piece 12. Makes it easier to bend inward. Then, as shown in FIG. 8, the lid surface piece 13 b is folded back from the position of the fold line L so as to cover the corners of the lid surface piece 12. Next, the lid surface piece is locked to the peripheral wall. That is, as shown in FIG. 9, the locking piece 20 is bent from the position of the crease M toward the peripheral wall surface, and further bent inward from the cut hole in the upper portion of the cover 37 provided on the peripheral wall surface 32. Next, the cover 37 is placed so as to cover the locking piece 20 from the outside. This state is shown in FIG.

The cardboard 100 is folded up to the cardboard case 200 as described above, and the operation will be described next.

The locking of the lid surface piece will be described. FIG. 10 shows a state in which the lid surface piece is closed and the lid surface piece is locked to the peripheral wall surface. As shown in FIGS. 8 and 9 in the previous stage, the side end portion of the locking piece 20 is provided with locking grooves 21a and 21b from the outside, so that two-stage locking is possible. In the present embodiment, it has been described that the two locking grooves 21 are provided. However, it may be provided at one place, or a plurality of locking grooves may be provided as necessary to constitute a multistage locking means. is there. On the other hand, a corner portion 38 is provided in the vicinity of the crease A above the cover 37 provided in the lid surface piece 32. The corner portion 38 is provided on the upper side of the cutout hole when the cover 37 is bent (shown in FIGS. 6 and 8). 8 and 9, the first locking groove 21a is fitted to the corner portion 38 to lock the lid surface piece 13b and the peripheral wall surface 32. In this case, the lid surface piece 13 is outside the case. Close and swell up. When the second locking groove 21b is fitted to the corner portion 38, the lid surface piece 13 is closed small. In this way, by using properly the first and second locking grooves, even if you put multiple fruits and vegetables with different growth sizes such as radishes, the lid can be expanded and locked out of the case The lid can be locked in two stages according to the size of the fruits and vegetables.

Next, a third embodiment of the present invention will be described with reference to FIGS. FIG. 11 is a development view of the cardboard case 200 of the present embodiment, which is a cardboard 100. FIG. 12 is a perspective view showing a state in the middle of closing the lid part. FIG. 13 is an enlarged perspective view in the middle of closing the lid part.

The main difference between the present embodiment and the first embodiment is that the lid surface piece folding method and the lid surface piece locking means are different.

As shown in FIG. 11, the substantially rectangular corrugated cardboard 100 is divided into the lid portion 10, the peripheral wall portion 30, and the bottom portion 40 in the vertical direction along the plurality of left and right folds. It is the same. The crease A is provided in the left-right direction from the top so that the lid part, the peripheral wall part and the bottom part are divided into three in the vertical direction, the crease B is parallel to the crease A, and the two creases H are parallel to these at the bottom 40. Prepare. The second peripheral wall 30 is provided with folds C, folds D, folds E, and folds F in parallel from the left in the direction perpendicular to the folds. The first-stage lid portion 10 is divided into lid surface pieces 11, 12, 13, and 14 on the left and right sides through the cuts. The lid surface pieces 11 and 13 are respectively provided with a lid piece 23 and a tongue piece 24 on the left and right as a set. The lid piece 23 has a crease R, and the tongue piece 24 has a crease Q. In addition, the upper and lower upper ends of the lid surface pieces 12 and 14 are each provided with a locking piece 18. The locking piece 18 has a crease P. The second-stage peripheral wall portion 30 and the third-stage bottom portion 40 are the same as those in the first embodiment.

The structure which latches the cover surface piece of the upper part 10 is the characteristic of a present Example.

The corrugated cardboard 100 has the above-described configuration, and a procedure for folding and locking the lid surface portion different from that in the first embodiment will be described below.

As in the first embodiment, the lid surface portion 10 is folded after being folded from the peripheral wall portion 30 and then the bottom portion 40 is folded. First, the left and right lid surface pieces 11 and the opposed lid surface piece 13 are bent 90 degrees inward from the position of the crease A. Next, the cover surface piece 12 is bent so as to cover these cover surface pieces. Next, as shown in FIG. 12, the lid surface piece 12 is locked to the lid surface piece 11 and the lid surface piece 13. Similarly, the lid surface piece 14 is locked to the lid surface piece 11 and the lid surface piece 13 to close the lid surface.

The cardboard 100 is folded up to the cardboard case 200 as described above, and the operation will be described next.

The locking of the lid surface piece will be described. FIG. 13 shows an enlarged view of the locking portion. First, the tongue piece 24 provided on the cover surface piece 11 is bent from the position of the fold line Q, and the cover piece 23 is bent from the position of the fold line R to the inside of the case. Then, the locking piece 18 provided on the lid surface piece 12 is fitted onto the tongue piece 24 by bending from the position of the fold line P, and then the lid piece 23 is put on the locking piece 18. That is, the lid piece 23, the locking piece 18, and the tongue piece 24 overlap from the outside to the inside of the case. At this time, the corner 25 (shown in FIG. 12) of the locking piece 18 is locked to the corner 26 (shown in FIG. 12) formed in the trace of the lid piece 23 being bent. Thus, since the locking piece 18 is sandwiched from above and below by the lid piece 23 and the tongue piece 24, it is difficult for the locking piece 18 to come off due to the restoring force caused by the bending of the lid piece 23 and the tongue piece 24. When the portion 25 is locked to the corner portion 26, the locking piece 18 is reliably stopped on the lid surface piece 11. The same applies to the lid surface piece 13. Further, the lid piece 23 acts to block these locking holes, and therefore has an effect of preventing dust from entering the case.

Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 14 is a development view of the cardboard case 200 of the present embodiment, which is a cardboard 100.

The main difference between the present embodiment and the first embodiment is that the bottom locking means is different.

As shown in FIG. 14, the substantially rectangular corrugated cardboard 100 is substantially divided into a lid portion 10, a peripheral wall portion 30, and a bottom portion 40 in the vertical direction along the left-right fold, which is substantially the same as in the first embodiment. It is. However, since the locking means of the bottom 40 is different, this will be described. A fitting convex portion 47 is provided on the left end of the bottom piece 42 and a fitting concave portion 46 is provided on the right. The same applies to the bottom piece 44. Further, corner portions 50 are provided at the corners of the boundary between the fitting convex portion 47 and the fitting concave portion 46, respectively.

Thus, the structure which latches the bottom part 40 is the characteristic of a present Example.

The corrugated cardboard 100 has the above-described configuration. Hereinafter, a folding procedure and operation of a portion different from the first embodiment will be described.

The bottom piece 44 is bent 90 degrees or more inward from the position of the fold B, and then the bottom piece 42 is bent 90 degrees or more inward from the position of the fold B from the opposite side. Next, the fitting concave portion 46 of the bottom piece 42 is locked to the fitting convex portion 47 of the bottom piece 44. This is different from the first embodiment. Next, the bottom pieces 41 and 43 are fitted from the position of the crease H to the inside of the case along the curved cut line Y from above the tongue pieces 45 at both ends of the bottom piece 41a. In this way, the bottom is locked and closed.

A recess is formed by mutual engagement of the bottom 40 with the four bottom pieces. The weight of the fruits and vegetables in the cardboard case deepens the engagement between the bottom piece 42 and the bottom piece 44 in the front-rear direction of the cardboard case from the inside, and finally the corner portions 50 of the fitting concave portion 46 and the fitting convex portion 47 are connected to each other. Are locked together. The heavier the fruits and vegetables, the stronger the locking of the four bottom pieces, and a locking strength of more than 20% compared to the conventional one can be obtained.

The use of the present invention is suitable for relatively heavy fruits and vegetables such as radish and Chinese cabbage.

In a development view of the cardboard case 200 of the first embodiment, it is a cardboard 100. It is a perspective view of the state which latched two bottom piece in the middle of closing a bottom part same as the above. It is a perspective view of the state which locked three bottom piece in the middle of closing a bottom part same as the above. It is a perspective view of the state which closed the bottom part same as the above. It is a perspective view of the state in the middle of closing a cover part same as the above. In a development view of the cardboard case 200 of the second embodiment, the cardboard 100 is shown. It is a perspective view of the state in the middle of closing a cover part same as the above. It is a perspective view of the state in the middle of closing a cover part same as the above. It is an expansion perspective view in the middle of closing a cover part same as the above. It is a perspective view of the state which closed the cover part same as the above. In a development view of the cardboard case 200 of the third embodiment, it is a cardboard 100. FIG. It is a perspective view of the state in the middle of closing a cover part same as the above. It is an expansion perspective view in the middle of closing a cover part same as the above. In a development view of the cardboard case 200 of the fourth embodiment, it is a cardboard 100.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Corrugated cardboard 200 Corrugated cardboard case 10 Cover part 11, 12, 13, 14 Cover surface piece 12a, 12b Cover surface piece 14a, 14b Cover surface piece 15 Tongue piece 16 Locking hole 17 Locking hole 18 Locking piece 19 Finger hole 20 Engagement Stopping piece 20a, 20b Locking piece 21 Locking groove 21a Locking groove 21b Locking groove 23 Lid piece 24 Tongue piece 25 Corner part 26 Corner part 30 Peripheral wall part 31, 32, 33, 34 Peripheral wall part 35 Paste piece 36 Finger Hole 37 Cover 38 Corner 40 Bottom 41, 42, 43, 44 Bottom piece 41a, 41b Bottom piece 41c, 41d End 43a, 43b Bottom piece 43c, 43d End 45 Tongue piece 46 Recess 46a, 46b Corner 47 Mating convex part 47a, 47b Corner part 48 Locking hole 49 Locking hole 50 Corner part A-R Crease L Diagonal crease S, T, V, W, X, Z Cut U Curve cut Y Curve cut

Claims (2)

The lid portion 10 has lid surface pieces 11, 12, 13 and 14 provided continuously,
The peripheral wall portion 30 is continuously provided with peripheral wall surfaces 31, 32, 33 and 34,
The bottom 40 has bottom pieces 41, 42, 43 and 44 connected to each other,
And the lid part 10, the peripheral wall part 30 and the bottom part 40 are folded up in a substantially rectangular parallelepiped shape from one corrugated cardboard 100 which is continuously provided in the vertical direction ,
By providing the bottom surface piece 42 with a fitting recess 46 and providing the bottom surface piece 44 with a fitting projection 47,
The bottom piece 42 is locked to the bottom piece 44,
Next, in the corrugated cardboard case in which the bottom piece 41 and 43 are locked to the bottom piece 42 and 44,
The bottom piece 42 and 44 includes a right-angled triangular tongue piece 45,
The bottom pieces 41 and 43 include bottom pieces 41a and 43a through fold lines H, respectively.
A locking hole 49 and an arc-shaped cut Y are formed in the trace of the tongue 45 being bent from the position of the fold K to the inside of the cardboard case 200,
While folding the bottom piece 41a and the bottom piece 43a from the position of the fold line H into a mountain shape, the bottom piece 41a and the bottom piece 43a are fitted along the curved cut line Y,
And the bottom piece 41a and 43a is locked to the locking hole 49,
And the said cover surface piece 13 is provided with the cover surface piece 13b through the crease L,
A locking piece 20 is connected to the end of the lid surface piece 13b via a crease M,
The locking piece 20 has a locking groove 21,
The peripheral wall surface 32 is provided with a cover 37 through a fold line N, and
The upper part has a corner 38,
The locking piece 20 is inserted into the inside of the cardboard case 200,
A corrugated cardboard case in which the locking groove 21 is locked to the corner portion 38 ;
The tongue piece 45 includes the fold K on the line of the cut Z,
The tongue piece 45 is configured to be bent from the position of the fold K to the inside of the corrugated cardboard case 200, and the fold K is a half of the combined length of the cut Z and the fold K or an appropriate length. Corrugated cardboard case. The cardboard case according to claim 1, wherein the locking piece includes one or a plurality of the locking grooves.

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