JP3277363B2 - Container made of synthetic resin sheet - Google Patents

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, which is adopted as a means for achieving the object, will be described with reference to the names and reference numerals of the respective parts of the embodiment. 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. with inclined surfaces 5 are formed, the
Reinforcing formed on the side wall 3 so as to protrude toward the inner side
Is provided at the upper end of a part of the rib 7.
Part of the outermost surface of the side wall 3 is vertically deformed downward.
A step portion 6 is formed on a part of the ribs, and the flange portion 1 is separated at a predetermined interval when a large number of the synthetic resin sheet containers are stacked.
It is a container made of a fat sheet .

[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 intervals, for example, in the case of forming at four places, it is possible to cover the entire periphery, such as the upper right end of each side of each of the four side walls 3 or the center, as much as possible. 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 this embodiment, the side wall is used.
3. Reinforcing ribs protruding toward the inner surface
7, and the outermost surface of the side wall 3 is partially vertically deformed downward at the upper end of a part of the lip of the rib 7 .
Steps 6 are formed on some of the ribs and the synthetic resin sheet is formed.
When a large number of containers made of
Are separated by a predetermined distance.
It is a container made of metal. Since such step portions 6 are provided on the four side wall surfaces, the maximum width formed by two opposing step portions 6 is equal to the maximum width between the two facing side walls, and protrudes outward from the side wall surface. Therefore, when the container moves with the side wall surface as a 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 molds is set to be different from each other, and the outer shape of the semi-finished container which is a single unit 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. May be formed at a plurality of locations on the surface of the side wall 3 as projections or recesses having dimensions to keep the stacked containers mutually spaced. 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, there is no factor that alienates the guide function on the side surface of the container when supplying the container to the conveyor as seen in the step 17 of the conventional example, so that 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.
FIG. 5 is a plan view, a front view, and a right side view of the embodiment, FIG. 5 is a plan view of a modification of the first embodiment, and FIG. 6 is a schematic perspective view for illustrating a manufacturing process of the first embodiment.

[0014] The contour in FIGS. 1 to 4, also the first embodiment showing the outline of the modified example in FIG. 5, a synthetic resin sheet material and is bulged shaped as a basic shape as described above, the upper edge 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.
Are formed at a plurality of locations on the side wall 3 and the stepped portion 6 serving as a guide is provided so that the flange portion 1 is stacked at a predetermined interval when a large number of the synthetic resin sheet containers are stacked. 3 is formed so as not to protrude from the outer surface. 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 positions of the step portions 6 are 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.

In the above-described second embodiment, as in the first embodiment, a plurality of types of deformations in which the positions of the steps 6 are different from each other are performed so that the containers do not adhere to each other when they are stacked. It goes without saying that there are examples. 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).

Although the embodiments which are considered to be representative of the present invention have been described above, the present invention is not necessarily limited to the structures of these embodiments, but includes the structural requirements of the present invention and is referred to as 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.

[0021]

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 packing the packaged goods by an automatic machine, and has a structure on the side of the container. The step portion serving as a spacer is formed so as not to protrude outside the side surface of the container. Therefore, since the stacked containers are held at a predetermined interval,
When the carrier of the automatic machine is inserted into the gap between the flange of the uppermost container and the flange of the next container and lifted one by one from the container of the uppermost layer, the operation of the carrier is disturbed. There is no.

Further , since the step is formed on the side surface of the container so as not to protrude outward from the side wall surface of the container,
When the container is moved to a predetermined position on the conveyor in the next process such as filling a product using the side surface of the container as a guide surface, factors that hinder the movement of the container are removed. Therefore, the supply and movement of containers by the automatic machine can be performed very stably,
It has a remarkable effect of improving work efficiency.

Furthermore, by the action of the inclined surface is formed at the boundary between the side surface and the bottom of the container, the strength of the container is increased, also the effect that can be efficiently used to foods that were packaged He had it.

[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 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

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65D 1/26 Z B65D 21/02 302

Claims (1)

(57) [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
(4) and with the inclined surface part or over the entire circumference of the boundary portion (5) is formed of, suited to the inner surface side to the side wall (3)
And a reinforcing rib (7) projecting from
Outermost surface of the side wall (3) at the upper end of some ribs of the
By partially deforming vertically in the vertical direction,
A container made of a synthetic resin sheet , wherein a step (6) is formed on a rib, and the flange portion (1) is separated at a predetermined interval when a large number of containers made of the synthetic resin sheet are stacked.