JPH11139420A - Synthetic resin sheet container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a synthetic resin sheet container which can be automatically and stably moved while securing an enough gap for practical purpose between containers in a piled up condition. SOLUTION: As to this synthetic resin sheet container formed by swelling a synthetic resin sheet material, a part of, or the whole periphery of the boundary between the side wall 3 and the bottom part 4 of a product storing recess 2 whose top end edge part is encircled with a flange part 1 is formed with a slanted face 5. And at a plurality of places on the side wall 3 or on the bottom part 4, a stage part 6 which guides the flange part 1 to be piled on the top of another flange with a predetermined interval when a plurality of the synthetic resin sheet containers are poled up are provided not protruding the outermost face of the side wall 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container for receiving, for example, natto and side dishes, which has a recess for accommodating a product, and which is separately molded or integrally molded to cover the container body. The present invention relates to a container formed by bulging a synthetic resin sheet material having a structure as described above.

[0002]

2. Description of the Related Art As an example of a conventional container formed by bulging such a synthetic resin sheet material, the structure of a container shown in FIG. 11 will be briefly described. The product accommodating recess 12 is formed. A lid fitting recess 15 into which the lid is fitted is formed between the flange portion 11 and the product accommodating recess 12. The product accommodating recess 12 includes a side wall 13 and a bottom portion 14. . Usually, a corrugate 16 for reinforcement is formed on a flat portion such as the flange portion 11 and the side wall 13.

[0003] The outline of the conventional packaging operation of goods in a molded container using this kind of synthetic resin sheet material is as follows. In the packaging process, a large number of containers are supplied to a conveyor in a stacked state, and the flange of the uppermost container is provided. Next, a carrier of an automatic machine is inserted into the gap between the part 11 and the flange part 11 of the next layer container and lifted one by one from the container of the uppermost layer. Was moved to a predetermined position on the conveyor.

[0004]

In the above-described packaging process using a conventional packaging container, the gap between the flange portion 11 of the uppermost layer container and the flange portion 11 of the next layer container becomes irregular, There is a drawback that it is difficult to lift and supply one by one from the uppermost container by the above-mentioned carrier. For the purpose of solving such a drawback, a container is formed in which a step portion 17 serving as a spacer for securing a gap with the flange portion 11 is formed on the outer surface of the container. Since it protrudes outward beyond the outer side surface, the side surface 13 cannot function as a guide surface, and there is a problem to be solved that the movement by the automatic machine is unstable.

Accordingly, the present invention has been devised to solve the problems of the above-described conventional example by modifying the shape of the containers, and moving the containers by an automatic machine while sufficiently securing the gap between the containers in a stacked state. An object of the present invention is to provide a container made of a synthetic resin sheet that can be stabilized.

[0006]

The construction of the container made of a synthetic resin sheet of the present invention, taken as a means for achieving the object, will be described by using the names and symbols of the respective parts of the embodiments. A container made of a synthetic resin sheet formed by bulging and forming a part or the entire circumference of a boundary portion between a side wall 3 and a bottom portion 4 of a product accommodating concave portion 2 whose upper edge portion is surrounded by a flange portion 1. An inclined surface 5 is formed, and a step serving as a stacking guide for separating the flange portion 1 at a predetermined interval when a large number of the synthetic resin sheet containers are stacked at a plurality of locations on the side wall 3 or the bottom portion 4. The portion 6 has a structure formed toward the inside of the outermost surface of the side wall 3.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In carrying out the present invention,
The synthetic resin sheet material 8 is shaped by blow molding.
By forming the blow mold in a shape corresponding to the structure of the above-described embodiment, it is possible to mold the container exactly in the same manner as a conventional container. As the synthetic resin sheet material 8, polyethylene terephthalate (commonly called polyester, or PET or
), And a sheet of polycarbonate, polystyrene, or the like.

The steps 6 formed at a plurality of positions on the side wall of the container made of a synthetic resin sheet (hereinafter simply referred to as a container) of the present invention are such that the flange portion 1 has a predetermined shape when a large number of containers are stacked. Since the purpose is to be stacked at an interval, for example, in the case of forming at four places, as much as possible over the entire periphery, such as at the upper right end of each side of each of the four side walls 3 or at the center, It is desirable to be evenly distributed.

When the container is used in a packaging process for commodities, the outermost surface of the side wall 3 is used as a guide surface for moving the container. The side wall 3 is formed toward the inner surface so as not to protrude outside the outermost surface. In the present embodiment, the upper end of the rib 7 formed on the side wall 3 for the purpose of reinforcement is partially deformed by vertically lowering the outermost surface of the side wall 3, and then the predetermined mutual displacement of the flange portion 1 when stacked is performed. The stepped portion 6 is formed by bending inward in the horizontal direction at a depth corresponding to the interval. Since such step portions 6 are provided on the four side wall surfaces, the maximum width formed by the two opposing step portions 6 is equal to the maximum width between the two facing side walls, and projects outward from the side wall surface. Therefore, when the container moves with the side wall surface as the guide surface, the step 6 does not become an obstacle for stable movement.

Further, when a plurality of containers having the same shape are stacked, the step 6 of the upper container enters the step 6 of the lower container and is overlapped by a slight pressure, and the flanges 1 of both containers are overlapped.
Can not maintain a predetermined mutual interval required in the packaging process, it is desirable that there are at least two or more types of containers in which the positions where the step portions 6 are formed are individually different,
As a means for manufacturing such a container, at least two blow molds are taken (actually, one is used to improve productivity).
The shape of the part corresponding to the step 6 of each molding surface of each of the plurality of molding dies is set to be different from each other, and the outer shape of the semi-finished container which is a series after molding is set. In the finishing step of punching, it is possible to extremely efficiently manufacture by successively stacking each time the outer shape punching is performed, and it is possible to provide the stacked state to the customer as a container.

When the containers having the steps 6 having the above-described shapes are stacked, the horizontal portion of the step 6 of the upper container comes into contact with the boundary portion between the flange portion 1 and the side wall 3 of the lower container. A gap corresponding to the depth of the step 6 of the container is formed therebetween. The shape and the location of the step 6 having such a function are not limited to the examples described above, and a protrusion may be provided in the middle of the rib 7 formed on the side wall 3 toward the inside of the container. Alternatively, the protrusions or recesses may be formed in the vicinity of the inclined surface 5 or at a plurality of locations on the bottom 4 of the container other than the side wall 3 so as to keep the distance between the stacked containers. Such a step 6 does not protrude outward from the side wall surface of the container, and keeps the distance between the stacked containers at a predetermined size. Therefore, the step 17 of the conventional example
Since there is no factor that alienates the guide function on the side of the container when supplying the container to the conveyor as shown in Fig. 7, the movement of the container in the packaging process is stable.

When the container is deep, generally, it is not easy to completely remove the contents such as foods remaining in the sharp corners at the bottom. Such a problem can be solved by forming an inclined surface over a part or the entire circumference of the boundary between the side wall 3 and the bottom 4, which has the effect of increasing the value added to the container as a product. Have.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below based on various embodiments shown in the drawings. FIG. 1 is a perspective view of a first embodiment of a container made of a synthetic resin sheet of the present invention, and FIGS. 2, 3 and 4 show a first embodiment shown in FIG.
FIG. 5 is a plan view, front view, right side view of the embodiment, FIG. 5 is a plan view of a modification of the first embodiment, FIG. 6 is a schematic perspective view for illustrating a manufacturing process of the first embodiment, FIG. 8 is a perspective view and a front view of a second embodiment, FIG. 8 is a third embodiment, and FIGS. 9 and 10 are a perspective view and a front view of a fourth embodiment.

FIGS. 1 to 4 show the outer shape, and FIG. 5 shows the outer shape of a modified example. As described above, the synthetic resin sheet material is bulged and formed into a basic shape as described above. A part of the boundary between the side wall 3 and the bottom part 4 of the product accommodating concave part 2 whose part is surrounded by the flange part 1 or an inclined surface 5 over the entire circumference.
And a step 6 serving as a guide so that when a large number of the synthetic resin sheet containers are stacked at a plurality of locations on the side wall 3 or the bottom 4, the flange portions 1 are stacked at a predetermined interval. Are formed so as not to protrude from the outer side surface of the side wall 3. The synthetic resin sheet material used in this embodiment is polyethylene terephthalate (commonly abbreviated as polyester or PET), but is not limited thereto, and a sheet of polycarbonate, polystyrene, or the like may be used.

The step 6 is formed at the upper single edge of the side wall 3 from the outer surface of the side wall 3 toward the inside. In this case, when the containers are stacked, the position of the step portion 6 is shifted in order to prevent the containers from closely contacting and stacking. However, there are several types of modified examples depending on the position of the upper single edge portion of the side wall 3. Adopted, Figure 1
Describes three types of modified examples as a container Pa, a container Pb, and a container Pc. Of course, it goes without saying that there may be more types. Hereinafter, the container P is shown in FIGS.
FIG. 5A illustrates a container Pc.

In the first embodiment, as shown, an inclined surface 5 is formed over the entire periphery of the boundary between the side wall 3 and the bottom 4 of the product accommodating recess 2. This inclined surface 5 has a reinforcing effect,
In addition to preventing deformation such as dents when a shocking external force acts on the corner near the bottom of the container, these contents remain in every corner when taking out the contents of packaged food etc. It has the feature that it can be used without waste and without waste.

FIG. 6 schematically shows one step during the manufacture of the first embodiment. The synthetic resin sheet material 8 is bulged by a molding die (not shown) having a plurality of molds to manufacture a continuous body of the semi-finished product Pp. In this continuum, the containers Pa, Pb, Pc,... Of the above-described modification are evenly mixed, one modification is surrounded by a modification of another shape, and adjacent semi-finished products of containers Pp are all of different shapes. This is a modified example. The container semi-finished product Pp of the continuous body is punched out (the punching die is not shown), and is stacked sequentially from the punched-out ones to form a stacked body P of containers. At this time, since the upper and lower sides of a certain container in the loading body P are all sandwiched by the modified containers having different shapes of the positions of the step portions 6, the flange portions 1 of the plurality of containers correspond to the height of the step portion 6. Will be maintained. In FIGS. 1 and 6, there are three types of modified examples. However, in order to implement the arrangement of the above-described modified examples, it is possible to provide at least two types of modified examples.

FIG. 7 is a perspective view showing a second embodiment. The step portion 6 of the second embodiment has a horizontal surface portion projecting toward the inside of the container at a position lower than the upper end edge of the side wall 3 by a predetermined dimension at the boundary of the reinforcing rib 7 of the side wall 3. It is formed as a projection.

FIG. 8 is a perspective view showing a third embodiment. The steps 6 of the third embodiment are formed as projections having predetermined heights at four locations on the bottom 4. In order for the stacked containers to be parallel to each other, it is desirable that the steps 6 of this type be distributed over as wide a range of the bottom 4 as possible.

FIGS. 8 and 9 are a perspective view and a front view, respectively, showing a fourth embodiment. In the fourth embodiment, the side wall 3 and the slope 5
Is in a straight line, and therefore, at the lower end of the rib 7, a horizontal plane having the same shape as the horizontal cross section exists at the boundary. The step portion 6 of the fourth embodiment is formed as a projection having a predetermined height in the horizontal plane.

In the above-described second to fourth embodiments, similarly to the first embodiment, a plurality of steps 6 are formed at different positions so that the containers do not come into close contact with each other when they are stacked. It goes without saying that there are various types of modifications. Further, in each of the above embodiments including the first embodiment, the inner peripheral edge of the flange portion 1 is a lid fitting recess for fitting the lid, but is not limited to this shape. For example, the present invention can also be applied to a container having a shape in which a flat flange portion is directly connected to the upper edge portion of the product storage recess, such as a tofu packaging container (both are not shown).

The embodiments which are considered to be representative of the present invention have been described above. However, the present invention is not necessarily limited to only the structures of the embodiments, but includes the structural requirements according to the present invention and refers to the present invention. The present invention can be implemented by appropriately modifying it within the range of achieving the object and having the following effects.

[0023]

As is apparent from the above description, the container made of the synthetic resin sheet of the present invention has a structure designed mainly for wrapping the packaged goods by an automatic machine, and has a structure designed so that the side of the container or A step portion serving as a spacer is formed on the bottom surface so as not to protrude outside the side surface of the container.
Therefore, since the stacked containers are held at a predetermined interval, the conveyance tool of the automatic machine is inserted into the gap between the flange portion of the uppermost layer container and the flange portion of the next layer container, and the uppermost layer is inserted. When lifting one by one from the container, the operation of the carrier is not hindered.

Further, since the step is formed so as not to protrude outward from the side wall surface of the container, the side surface of the container or the like is moved to a predetermined position on the conveyor in the next step such as filling the product by using the side surface of the container as a guide surface. In some cases, factors that hinder the movement of the container have been eliminated. Therefore, the supply and movement of the container by the automatic machine can be performed extremely stably, which has a remarkable effect of improving the work efficiency.

Further, the effect of the inclined surface also formed at the boundary between the side surface and the bottom portion of the container improves the strength of the container and has the effect that the packaged food and the like can be used without waste. It also has.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention.

FIG. 2 is a plan view of the first embodiment.

FIG. 3 is a front view of the first embodiment.

FIG. 4 is a right side view of the first embodiment.

FIG. 5 is a plan view of a modification of the first embodiment.

FIG. 6 is a schematic perspective view for explaining one manufacturing process of the first embodiment.

FIG. 7 is a perspective view of a second embodiment.

FIG. 8 is a perspective view of a third embodiment.

FIG. 9 is a perspective view of a fourth embodiment.

FIG. 10 is a front view of a fourth embodiment.

FIG. 11 is a perspective view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flange part 2 Commodity accommodating recess 3 Side wall 4 Bottom part 5 Inclined surface 6 Step part 7 Rib 8 Synthetic resin sheet material

Claims (1)

[Claims] 1. A container made of a synthetic resin sheet formed by bulging a synthetic resin sheet material, wherein a side wall (3) of a product accommodating recess (2) whose upper edge is surrounded by a flange (1). And bottom
An inclined surface (5) is formed over a part or the entire circumference of the boundary with (4), and a large number of containers made of the synthetic resin sheet are provided at a plurality of locations on the side wall (3) or the bottom (4). A synthetic resin sheet having a stepped portion (6) serving as a stacking guide for separating the flange portion (1) at a predetermined interval when stacked is formed toward the inside of the outermost surface of the side wall (3). Container.