JPH1111507A - Plastic sheet container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plastic sheet container wherein the container can be kept in a state that a lid is closed with strength necessary for transportation, also it can be opened with slight force, and contents may not scatter at the time of opening. SOLUTION: The plastic sheet container comprising a body 1 and a lid 2 each including outer peripheral flaps 3, 4 is equipped with undercut-like fitting parts 5A, 5B, 6A, 6B at respective base ends of the outer peripheral flap of the body 1 or the lid 2, while the fitting parts 5A, 5E, 6A, 6B are placed so that they fit to each other. Protrusions 11, 12 are provided on the respective outer peripheral flaps 3, 4 at positions where they do not overlap when the body 1 and the lid 2 are closed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic sheet container comprising a body and a lid each having an outer peripheral flap.

[0002]

2. Description of the Related Art A plastic sheet container has, for example, a concave portion formed by deformation of a sheet and a flat flap portion outside the concave portion on each of opposing surfaces of a two-fold or two-fold plastic sheet. When the flap portions are overlapped, the recess forms a container shape, and one of the containers is a body and the other is a lid. In such a conventional plastic sheet container, the outer contours of the overlapped flap portions are the same, and there are the following structures for closing the lid.

In the first prior art, as shown in FIG.
The plastic sheet container comprises a body 101 and a lid 102, and a flat outer peripheral flap 1 is provided on the outer edge of each concave portion.
03 and 104 are provided. Outer peripheral flap 103, 1
04 are connected to each other by a hinge 110,
1 and the lid 102 are bent by a hinge 110 and can be opened and closed. Outer circumference flap 103 of body 101
, A plurality of cylindrical convex hooks 105 are protruded, and a concave hook 106 is concavely formed on the outer peripheral flap 104 of the lid 102 at a position facing the convex hook 105. The concave hooks 106 are firmly pushed into the convex hooks 105 to fit each other, and the lid 102 is closed. At the time of opening, put the fingertips of both hands between the outer peripheral flaps 103 and 104, grasp each of them, open up and down, and release the hooks from each other.

In the second prior art, as shown in FIG.
As in the first prior art, the plastic sheet container is
It comprises a body 201 and a lid 202, and flat outer peripheral flaps 203 and 204 are provided around the outer edge of each concave portion. One ends of the outer circumferential flaps 203 and 204 are connected to each other by a hinge 210, and the body 201 and the lid 202 are bent by the hinge 210 and can be opened and closed. Outer peripheral flap 20 on the side of body 201 facing hinge 210
A convex fitting portion 205 having a convex shape is formed at both corners of a base end portion (referred to as a root portion) of the third fitting portion 20.
5 is provided with a convex undercut 207 on the outer surface thereof. In addition, at both corners of the base end of the outer peripheral flap 204 on the side facing the hinge 210 of the lid 202, a concave concave fitting portion 2 is provided.
06 is formed, and a concave undercut 208 is formed on the inner surface of the concave fitting portion 206. By pushing the concave fitting part 206 into the convex fitting part 205, the convex undercut 207 and the concave undercut 208 are engaged, and the lid 202 is kept closed. At the time of opening, put the fingertips of both hands between the outer peripheral flaps 203 and 204, grasp each of them, open up and down, and disengage the undercuts from each other.

In the third prior art, as shown in FIG.
As in the first prior art, the plastic sheet container is
It comprises a body 301 and a lid 302, and flat outer peripheral flaps 303 and 304 are provided around the outer edge of each recess. One ends of the outer peripheral flaps 303 and 304 are connected to each other by a hinge 310, and the body 301 and the lid 302 are bent by the hinge 310 and can be opened and closed. The body 301 and the lid 302
In a state where 3, 304 are put together, the stapling is stopped at an arbitrary position by a staple 311 and the lid 302 is closed. At the time of opening, the stapler needle 311 is removed with a nail, or the fingertips of both hands are inserted between the outer peripheral flaps 303 and 304, and the stapler is opened up and down to remove the stapler needle 311.

In the fourth prior art, as shown in FIG.
As in the first prior art, the plastic sheet container is
It consists of a body 401 and a lid 402, and flat outer peripheral flaps 403 and 404 are provided around the outer edge of each recess. One ends of the outer peripheral flaps 403 and 404 are connected to each other by a hinge 410, and the body 401 and the lid 402 are bent by the hinge 410 and can be opened and closed. The body 401 and the lid 402 are respectively
With the three and 404 together, the three sides other than the hinge 410 are stopped by high-frequency welding 411, and the lid 402 is closed. At the time of opening, the container is opened by cutting the lid 402 using a cutter knife or scissors.

In the fifth prior art, as shown in FIG.
As in the first prior art, the plastic sheet container is
It consists of a body 501 and a lid 502, and flat outer peripheral flaps 503 and 504 are provided around the outer edge of each concave portion. One ends of the outer peripheral flaps 503 and 504 are connected to each other by a hinge 510, and the body 501 and the lid 502 are bent by the hinge 510 and can be opened and closed. A perforation 511 is formed in the hinge 510 along the hinge direction. The body 501 and the lid 502 are stopped at an arbitrary position by a staple needle 512 with the outer peripheral flaps 503 and 504 aligned, or the lid 502 is closed by high frequency welding or the like.
At the time of opening, the body 501 and the lid 502 can be separated by breaking the perforation 511 along the hinge direction, and the lid 502 is opened.

[0008]

The plastic sheet container must be firmly attached to the body and lid in order to eliminate the problem that the lid is opened by a slight vibration, shock, or pressure during transportation and the stored items are ejected. Must be fitted or joined. On the other hand, if the body and the lid are firmly fitted or joined, it becomes difficult to open the package. Particularly, in the case of a plastic sheet container, the stored items may be scattered too much when the package is opened. Also in the first to fifth prior arts described above, in common, a large force is required when opening the lid, and the container itself is greatly swung at the moment of opening, and the lid is opened vigorously. The small and light storage items may scatter outside.

Further, the third to fifth prior arts have the following problems. (1) In the third conventional technique, a tool called a stapler is required when closing the lid, which increases the cost. When opening,
A tool for removing the staple is required, and its use is cumbersome. In practice, there are often no tools to remove the staples, so remove the staples with your nails or grasp the outer flap between your body and the lid and apply force up and down to remove the staples. Become. For this reason, there is a drawback that the stapled needle is difficult to remove, and in some cases, the stored articles are scattered to the outside at the moment the needle is removed. (2) In the fourth prior art, the lid can be closed most strongly in the prior art, but it requires an expensive machine such as a high-frequency welding device, which increases the cost. Also, opening by hand is impossible, you need to use cutter knives and scissors,
There was the disadvantage of using nerves when opening. (3) In the fifth prior art, if the plastic sheet is thin, it can be broken along the perforations of the hinge. However, if the plastic sheet is thick, it is not easily cut even if the plastic sheet is perforated. Limited to plastic sheet containers. Further, in the case of a flexible and stretchable plastic sheet, there is a drawback such that it is impossible to break perforations by hand.

[0010] The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention according to claims 1, 2 or 3 is that the lid can be maintained in a closed state with strength required for transportation, An object of the present invention is to provide a plastic sheet container that can be opened with a small force and does not scatter stored items at the moment of opening.

[0011]

In order to solve the above problems, the invention according to claim 1, 2 or 3 is a plastic sheet container comprising a body and a lid each having an outer peripheral flap. An undercut-shaped fitting portion is provided at each of the base ends of the outer peripheral flaps of the lid, and the fitting portions are arranged so as to be fitted to each other,
On each of the outer peripheral flaps, a projection is provided at a position where they do not overlap each other when the body and the lid are closed.

According to the operation of the first, second or third aspect of the present invention, an undercut-shaped fitting portion is provided at each of the base ends of the outer peripheral flaps of the body or the lid, and the fitting portions are fitted with each other. On each of the outer flaps, by providing projections at positions that do not overlap each other when the body and the lid are closed, so that the fitting portions provided on both the body and the lid make it stronger. Maintain the closed state, at the time of opening,
Hang your forefinger and thumb on the protrusion provided on the outer flap,
Each is simultaneously pushed up and down to remove the undercut fitting part with a small force. In the operation of the invention according to claim 2 or 3, in addition to the above operation, the body and the lid are provided with hinges at ends facing the fitting portions on the outer peripheral flaps of each other, and are connected so as to be bent. Thereby, the body and the lid can be set, and the undercut-shaped fitting portion is provided only on the side of the outer peripheral flap facing the hinge to close or open the body and the lid. In the operation of the invention according to claim 3, in addition to the above operation, the projection is provided with a rib to reinforce the strength of the projection.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] FIGS. 1 and 2 show a first embodiment of the present invention. FIG. 1 is a perspective view of a plastic sheet container, and FIG. 2 is an enlarged view of a state where fitting portions of a body and a lid are fitted to each other. It is sectional drawing.

In FIG. 1, the plastic sheet container comprises a body 1 and a lid 2, and has flat outer peripheral flaps 3 and 4 provided around the outer edges of the respective concave portions. One ends of the outer peripheral flaps 3 and 4 are connected to each other by a hinge 10 and
The lid 2 is bent by a hinge 10 and can be opened and closed. Convex convex fitting portions 5A and 5B are formed at both corners of the base end portion (base portion) of the outer peripheral flap 3 on the side facing the hinge 10 of the body 1, and furthermore, the convex fitting portions 5A are formed. 5B, a convex undercut 7 bulges and protrudes into a deeper shape than the convex undercut 207 in the second conventional technique (see FIG. 2). Also,
At both corners of the base end portion (base portion) of the outer peripheral flap 4 on the side facing the hinge 10 of the lid 2, a concave concave fitting portion 6A is provided.
6B are formed, and a concave undercut 8 is formed on the inner surface of each of the concave fitting portions 6A and 6B so as to match the bulging amount of the convex undercut 7 (see FIG. 2). As shown in FIG. 2, the concave fitting portions 6A,
By pushing in 6B, the convex undercut 7 and the concave undercut 8 are engaged with each other, the engagement strength is higher than in the second conventional technique, and the lid 2 is kept closed.

As shown in FIG. 1, a lower projection 1 is provided substantially at the center of the outer peripheral flap 3 on the side facing the hinge 10 of the body 1.
1 is protruded. An upper protrusion 12 is provided on the outer peripheral flap 4 on the side of the lid 2 facing the hinge 10 and at a position close to the concave fitting portion 6A. As shown in the partially enlarged view A of FIG. 1, the relative positions of the lower protrusion 11 and the upper protrusion 12 are adjacent to each other at a distance without overlapping each other when the body 1 and the lid 2 are closed. When the plastic sheet container is opened, the lower protrusion 11 and the upper protrusion 12
At the same time, the engagement between the convex undercut 7 and the concave undercut 8 is released by hanging the thumb and the index finger in the directions of the up and down arrows.

Next, the operation of the plastic sheet container having the above configuration will be described. When closing the plastic sheet container, the body 1 and the lid 2 are combined, and the steps 6Aa, 6Ba of the concave fitting portions 6A, 6B of the lid 2 and the steps 6Aa, 6Ba,
By pressing the outer peripheral flap 3 of the body 1 facing 6Ba, the convex fitting portions 5A and 5B and the concave fitting portions 6A and 6B are firmly fitted. In this case, the tips of the convex undercuts 7 of the convex fitting portions 5A, 5B are initially connected to the concave fitting portions 6A, 6B.
Abuts on the upper projection 12 and the lower surface of the outer peripheral flap 4 which are close to the outer peripheral flap 4. The steps 6Aa, 6Ba of the concave fitting portions 6A, 6B and the outer peripheral flap 3 of the body 1 opposed to the steps 6Aa, 6Ba.
Is pressed by the elastic deformation, the body 1 is contracted by the elastic deformation, and the lid 2 is extended, so that the body 1 gets over the inner walls 6Ab, 6Bb (not shown) of the concave fitting portions 6A, 6B and engages with the concave undercut 8. (See FIG. 2).

When opening the plastic sheet container,
The body 1 is grasped and fixed with the left hand, and the thumb and the index finger of the right hand cross each other.
The abdomen of the thumb is applied to the upper surface of the upper part of the upper part, and as shown by the arrow in the partially enlarged view A of FIG. By this operation, the convex fitting portion 5A and the concave fitting portion 6A are engaged by the convex undercut 7 and the concave undercut 8, but the body 1 contracts due to elastic deformation, and the lid 2 extends. Therefore, the tip of the convex undercut 7 gets over the inner wall 6Ab of the concave fitting portion 6A, the engagement is released, and the convex fitting portion 5A and the concave fitting portion 6A are opened. The convex fitting portion 5B and the concave fitting portion 6B are engaged with each other by the convex undercut 7 and the concave undercut 8, but the convex fitting portion 5A and the concave fitting portion 6A are opened. The plastic sheet container is easily opened. Therefore, the plastic sheet container can be easily opened with one hand.

According to the first embodiment of the present invention, since the plastic sheet container is strongly fitted in the undercut fitting portion, the lid can be maintained in a closed state with the strength necessary for transportation. In addition, when opening, it can be opened with a small force possible with one hand, and the stored items are not scattered at the moment of opening.

In the first embodiment of the present invention, the upper projection 12 is provided on the side of the concave fitting portion 6A, but may be provided on the side of the concave fitting portion 6B. Further, the lower protrusion 11 is connected to the convex fitting portion 5A or 5B.
, And the upper protrusion 12 may be provided in the middle of the concave fitting portions 6A and 6B. Furthermore, the body 1 and the lid 2
The body 1 and the lid 2 are separated from each other. Instead, the body 1 is provided with a cylindrical projection, and the lid 2 is provided with a cylindrical projection of the body 1. A fitting cylindrical hook may be provided so as to be detachable and rotatable. Furthermore, in the first embodiment of the present invention, the plastic sheet container in which the body and the concave portion of the lid are formed in a rectangular shape is described, but the shape of the concave portion is a polygon such as a hexagon or an ellipse. Also, the first embodiment of the present invention can be applied as long as the hinge and the fitting portion are provided to face each other.

Second Embodiment FIG. 3 shows a second embodiment of the present invention, and is a partially enlarged view of a fitting portion and a projection of a plastic sheet container. Since the second embodiment of the present invention has ribs provided on the upper and lower protrusions of the first embodiment of the present invention, only this portion is shown, and other portions are the same as those of the first embodiment of the present invention. , The same members are denoted by the same reference numerals, and the drawings and description are omitted.

In FIG. 3, a rib 13 is provided at the center of the lower projection 11A of the body 1 near the side wall of the body 1 so as to protrude downward. In the center of the upper projection 12A of the lid 2,
A rib 14 is provided near the concave fitting portion 6A. The ribs 13 and the ribs 14 can be formed at the same time when the plastic sheet container is manufactured, if the shape of the mold is such that the ribs can be formed when the plastic sheet container is formed.

Next, the operation of the second embodiment of the present invention will be described. By providing the ribs 13 and 14 so as to protrude upward, the lower protrusion 11A and the upper protrusion 12A are formed.
When the body 1 and the lid 2 are opened, the projection does not bend when the body 1 and the lid 2 are opened, so that the force in the direction of removing the fitting portion can be effectively transmitted. Other operations are the same as those of the first embodiment.

According to the second embodiment of the present invention, in addition to the effect of the first embodiment of the present invention, the strength of the projection is increased, so that the force for disengaging the fitting portion is transmitted effectively, and the plastic force is reduced with a smaller force. The sheet container can be opened. Further, since the projection does not bend, the container can be opened even with a thin plastic sheet or a plastic sheet container made of a material having low strength.

Also in the second embodiment of the present invention, the modification shown in the first embodiment of the present invention can be applied as it is.

Third Embodiment FIG. 4 shows a third embodiment of the present invention and is a perspective view of a plastic sheet container. In the third embodiment of the present invention, the positions of the fitting portion and the projection in the first embodiment of the invention are changed, and the fitting portion and the projection are provided at one center on the opening side opposite to the hinge. It is.

In FIG. 4, the plastic sheet container comprises a body 21 and a lid 22, and flat outer peripheral flaps 23 and 24 are provided around the outer edge of each recess. One ends of the outer peripheral flaps 23 and 24 are connected to each other by a hinge 30, and the body 21 and the lid 22 are bent by the hinge 30 and can be opened and closed. At the center of the base end of the outer peripheral flap 23 on the side facing the hinge 30 of the body 1, a convex convex fitting portion 25 is formed.
A convex undercut (not shown) similar to the convex undercut 7 according to the first embodiment of the present invention is provided on the outer surface of the convex surface 5 so as to protrude to a shape deeper than the convex undercut 207 according to the second conventional technique. ing. A concave concave fitting portion 26 is formed at the center of the outer peripheral flap 24 on the side of the lid 22 that faces the hinge 30.
The concave undercut 8 according to the first embodiment of the present invention
A concave undercut (not shown) similar to the above is recessed so as to match the bulging amount of the convex undercut. By pushing the concave fitting portion 26 into the convex fitting portion 25, the convex undercut and the concave undercut are engaged with each other, the engagement strength is higher than in the second conventional technique, and the lid 22 is kept closed. I do.

As shown in FIG. 4, a lower projection 27 is provided at a position slightly leftward toward the convex fitting portion 25 on the outer peripheral flap 23 on the side facing the hinge 30 of the body 21. I have. An upper projection 28 is provided on the outer peripheral flap 24 on the side of the lid 22 facing the hinge 30 and at a position slightly closer to the right toward the concave fitting portion 26. As shown in a partially enlarged view B of FIG. 4, the relative positions of the lower protrusion 27 and the upper protrusion 28 are adjacent to each other at a position separated from each other without overlapping when the body 21 and the lid 22 are closed. When opening the plastic sheet container, the lower projection 27
The engagement between the convex undercut and the concave undercut is released by placing a thumb and a forefinger on the upper projection 28 and pressing the same in the directions of the up and down arrows.

As in the first embodiment of the present invention, when closing the plastic sheet container, the body 221 and the lid 22 are combined, and the step 26a of the concave fitting portion 26 of the lid 22 faces the step 26a. The outer peripheral flap 23 of the body 21 is pressed against the convex fitting portion 25 and the concave fitting portion 26 to be firmly fitted. In this case, the tip of the convex undercut (not shown) of the convex fitting portion 25 initially contacts the upper protrusion 28 and the lower surface of the outer peripheral flap 24 which are close to the concave fitting portion 26, but the step of the concave fitting portion 26 When the lower projection 26a and the portion of the lower projection 27 and the outer peripheral flap 23 of the body 21 facing the step 26a are pressed together, the body 21 contracts due to elastic deformation and the lid 22 extends, so that the inner wall of the concave fitting portion 26 is extended. 26b
(Not shown) and engages with a concave undercut (not shown).

When opening the plastic sheet container,
The body 21 is grasped and fixed with the left hand, and the thumb of the right hand and the index finger are parallel to each other. The upper part of the thumb is put on the upper side of the thumb, and the upper projection 28 is pushed upward and the lower projection 27 is pushed simultaneously downward as shown by the arrow in the partially enlarged view B of FIG. By this operation, the convex fitting portion 25 and the concave fitting portion 26 are engaged by the convex undercut and the concave undercut, but the body 21 contracts due to the elastic deformation and the lid 22 extends, so that The tip of the convex undercut passes over the inner wall 26b (not shown) of the concave fitting portion 26, the engagement is released, and the convex fitting portion 25 and the concave fitting portion 26 are opened. Thereby, the plastic sheet container is easily opened. Therefore, the plastic sheet container can be easily opened with one hand.

According to the third embodiment of the present invention, in addition to the effect of the first embodiment of the present invention, since the number of fitting portions is small, when closing the body and the lid, the third embodiment is different from the first embodiment of the present invention. Can also be closed more quickly. Also, since the number of undercuts is small, when manufacturing plastic sheet containers,
Release from the mold becomes easy.

In the third embodiment of the present invention,
The lid 22 and the lid 22 are connected so as to be bent by a hinge 30. Instead, the body 21 and the lid 22 are separated from each other, and the body 21 is provided with a columnar projection. A cylindrical hook that fits into the cylindrical projection 21 may be provided so as to be detachable and rotatable. Further, in the third embodiment of the present invention, a plastic sheet container in which the concave portions of the body and the lid are formed in a square shape is described, but the shape of the concave portion may be a polygon such as a hexagon or an ellipse. Embodiment 3 of the present invention can be applied as long as the hinge and the fitting portion are provided to face each other. Further, similarly to Embodiment 2 of the invention, the lower protrusion 27 and the upper protrusion 28
The ribs can be attached to the to increase the strength.

[0032]

According to the first, second or third aspect of the present invention, the closed state is firmly maintained by the fitting portions provided on both the body and the lid, and the projection provided on the outer peripheral flap at the time of opening. With the forefinger and thumb, and simultaneously press up and down simultaneously to remove the undercut fitting part with a small force. Thus, it is possible to avoid a situation in which the stored items are scattered at the moment of opening.
According to the invention according to claim 2 or 3, in addition to the above effects, the body and the lid can be set, and an undercut-shaped fitting portion is provided only on the side of the outer peripheral flap facing the hinge, so that the body and the lid are provided. Since the lid is closed or opened, the reproducibility by molding is high and the quality by mass production can be kept constant. According to the third aspect of the invention, in addition to the above effects, the projections are provided with ribs to reinforce the strength of the projections, so that the projections can be opened with a smaller force. Further, the plastic sheet container can be formed from a thin sheet or a material having low strength.

[Brief description of the drawings]

FIG. 1 is a perspective view of a plastic sheet container according to Embodiment 1 of the present invention.

FIG. 2 is an enlarged cross-sectional view of the first embodiment of the invention in a state where fitting portions of a body and a lid are fitted to each other.

FIG. 3 is a partially enlarged view of a fitting portion and a protrusion of a plastic sheet container according to a second embodiment of the present invention.

FIG. 4 is a perspective view of a plastic sheet container according to Embodiment 3 of the present invention.

FIG. 5 is a perspective view of a first prior art plastic sheet container.

FIG. 6 is a perspective view of a second prior art plastic sheet container.

FIG. 7 is a perspective view of a third prior art plastic sheet container.

FIG. 8 is a perspective view of a fourth prior art plastic sheet container.

FIG. 9 is a perspective view of a fifth prior art plastic sheet container.

[Explanation of symbols]

 Reference Signs List 1 body 2 lid 3 outer peripheral flap 4 outer peripheral flap 5A convex fitting portion 5B convex fitting portion 6A concave fitting portion 6B concave fitting portion 11 lower protrusion 12 upper protrusion 13 rib 14 rib

Claims (3)

[Claims] 1. A plastic sheet container comprising a body and a lid each having an outer peripheral flap, wherein an undercut fitting portion is provided at each base end of the outer peripheral flap of the body or the lid. A plastic sheet container wherein fitting portions are arranged so as to be fitted to each other, and projections are provided on respective outer peripheral flaps at positions where they do not overlap each other when the body and the lid are closed. 2. The plastic according to claim 1, wherein the body and the lid are provided with hinges at ends of the outer peripheral flaps facing the fitting portion, and are connected to bend. Sheet container. 3. The plastic sheet container according to claim 1, wherein the projection is provided with a rib.