JP5365924B2 - Synthetic resin cup-shaped container - Google Patents

Description

  The present invention relates to a container for filling and storing semi-solid contents such as pudding, konnyaku, and agar. More specifically, an air hole for taking out the contents stored and stored in the bottom part of the container can be opened. It relates to the constructed container.

  2. Description of the Related Art Conventionally, as a container for filling and storing semi-solid contents such as pudding, konjac, and agar, a container configured to open an air hole for taking out the contents stored and stored in the bottom surface of the container is known.

  A typical configuration of this type of container is one in which a protrusion is integrally formed on the bottom plate of the container, and when taking out the contents, the protrusion is forcibly pushed down with the container turned upside down. An air hole is formed in the bottom plate to prevent a vacuum from being generated between the container and the contents so that the falling out of the container by the weight of the contents can be smoothly achieved.

  However, in the above-described prior art, pushing down of the protrusion is not necessarily achieved constantly, and a large force is required to push down the protrusion, and thus an unpleasant irritation occurs on the fingertip that pushes down the protrusion. There was a problem.

  In addition, there is a problem that the contents are damaged when the protrusion is pushed down while being depressed in the container.

JP 2006-248574 A

  Therefore, the present invention was devised to solve the above-described problems in the prior art, and it is a technical problem to enable the protrusions to be pushed down in a fixed form accompanying bending deformation. It is an object of the present invention to enable a comfortable and stable push-down of a projection by a preset operation force.

The main configuration of the present invention for solving the above technical problem is:
Forming an opening function part in a part of the lower surface of the bottom plate with the leg pieces suspended;
The opening function part is constituted by a protrusion that breaks and opens the air hole by pushing down, and an annular thin part that is formed on the bottom plate portion around the protrusion and is broken by pushing down the protrusion,
Setting the thickness of the annular thin portion of the opening function portion to a value that is easier to break than the bottom plate, and setting the width of the annular thin portion to a value that allows a slight deformation,
An annular thick part with an increased thickness of the bottom plate part is formed on the bottom plate part around the annular thin part, and the thickness of the annular thick part is 2 to 10 times the thickness of the annular thin part. about,
It is in.

  Since the opening function part composed of the protrusion and the annular thin part is formed on a part of the lower surface of the bottom plate with the leg pieces hanging down, the container in the upright posture state of the container at the time of display or storage Thus, it is less likely to be tampered with by being caught by other articles.

  In the opening function portion, the annular thin portion positioned around the protrusion has a thickness that is smaller than the surrounding bottom plate portion and easily breakable, and has a width that allows a slight deformation. When the protrusion is pushed down in a predetermined direction, it is slightly bent and deformed, and then is broken to form an air hole.

  That is, when the protrusion is pushed down, the annular thin wall portion on the collapsed side is bent and deformed in a deformed shape, whereas the annular thin wall portion on the collapsed side is bent and deformed in a compressive deformation shape. The stress easily acts as a breaking force at the annular thin portion on the collapse side, whereby the annular thin portion on the collapse side is broken to open an air hole. At this time, the annular thin portion on the tilted side provides a fulcrum portion of the projection that is inclined and displaced, that is, a hinge function portion.

  When the air hole is opened, the deformation of the annular thin portion exhibits a cushioning action against the breaking operation of the annular thin portion, so that the opening of the air hole is achieved with a small impact.

In addition, since the annular thick part is formed around the annular thin part, it exhibits a stable support function for the annular thin part where the annular thick part bends and deforms, and has a high resource saving effect of the molded resin material. Therefore, a high resource-saving effect of the molded resin material can be maintained without increasing the thickness of the bottom plate that is molded with the wall thickness minimized. Furthermore, since the thickness of the annular thick part is 2 to 10 times the thickness of the annular thin part, the thickness of the annular thin part is at least 0.1 mm in terms of formability and management. Since the thickness of the annular thick part that can stably support the deformation of the annular thin part is about 0.4 to 1.0 mm, the thickness of the annular thin part is appropriate. An appropriate breaking operation can be obtained stably.

  In addition to the main configuration described above, another configuration of the present invention is such that the upper surface portion of the bottom plate located on the opposite side of the lower surface portion where the opening function portion is formed has a flat surface shape.

  In the case where the upper surface portion of the bottom plate located on the opposite side of the lower surface portion where the opening function portion is formed has a flat surface shape, the internal stress generated when the annular thin portion is deformed is easily concentrated. The part is formed only on the lower surface side of the bottom plate, so that the breakage for opening the air holes always occurs on the lower surface side of the bottom plate, and thus the protrusion is displaced in the direction of lifting from the lower surface of the bottom plate. Open the hole to break.

  In addition to the main configuration described above, another configuration of the present invention is such that the value of the width of the annular thin portion is set larger than the value of the thickness of the annular thin portion.

  In the case where the value of the width of the annular thin portion is set larger than the value of the thickness of the annular thin portion, the opening of the air hole is reliably obtained by pushing down the protrusion.

  That is, by setting the value of the width of the annular thin portion larger than the value of the thickness, it is possible to prevent the occurrence of poor opening of the air holes due to the protrusions contacting the annular thick portion.

  Further, in addition to the main configuration described above, another configuration of the present invention is configured such that the width of the annular thin portion on the side where the force for tilting the projection acts is the width of the annular thin portion on the side where the projection is collapsed. On the other hand, it is set to an equal or smaller value.

  In the case where the width of the annular thin portion on the collapsed side is set to be equal to or smaller than the width of the annular thin portion on the collapsed side, the collapsed side thin portion is Accordingly, the fulcrum is deformed and deformed in an appropriate manner to provide a stable fulcrum portion with respect to the protrusions that are inclined and displaced.

  In addition to the main configuration described above, another configuration of the present invention is the same as the thickness of the annular thin portion on the side where the force for tilting the projection acts, and the thickness of the annular thin portion on the side where the projection is collapsed. It is set to a value equal to or smaller than the thickness.

  If the wall thickness of the annular thin wall portion on the collapsed side is set to a value equal to or smaller than the wall thickness of the annular thin wall portion on the collapsed side, the annular thin wall on the collapsed side with respect to the annular thin wall portion on the collapsed side The breakage of the part can be reliably obtained at an early stage.

Since the present invention has the above-described configuration, the following effects can be obtained.
In the main configuration of the present invention, the opening function part is hidden in the main body part of the container, so that it is not erroneously operated due to parallax and high safety can be obtained accordingly.

  In addition, the bending deformation of the annular thin portion at the opening of the air hole breakage exhibits a cushioning action against the breaking operation of the annular thin wall portion, so that the break opening of the air hole does not cause an unpleasant resistance, It can be obtained reliably and consistently.

Since the formation of the annular thick portion around the thin annular portion, it is possible to obtain a stable breaking operation of the thin annular portion, it is possible to maintain a high molding a resin material resource saving effect, the container It can be provided at a lower cost. Furthermore, since the thickness of the annular thick part is 2 to 10 times the thickness of the annular thin part, the annular thin part can be stably and properly broken, and the air hole is reliably opened. be able to.

  In the case where the upper surface portion of the bottom plate located on the opposite side of the lower surface portion where the opening function portion is formed is a flat surface shape, the protrusion opens the air hole while being displaced in the direction of lifting from the lower surface of the bottom plate. The portion broken for opening the air hole is not displaced in a recessed manner in the container, whereby the content is not damaged at all, and a preferable content removal process can be obtained.

  When the value of the width of the annular thin portion is set larger than the value of the thickness of the annular thin portion, a reliable and stable opening of the air hole can be obtained.

  In the case where the width of the annular thin portion on the collapsed side is set to be equal to or smaller than the width of the annular thin portion on the collapsed side, the annular thin portion on the collapsed side is greatly stretched and deformed flexibly. Thus, a stable opening of the air hole can be obtained.

  If the wall thickness of the annular thin wall portion on the collapsed side is set to a value equal to or smaller than the wall thickness of the annular thin wall portion on the collapsed side, the annular thin wall on the collapsed side with respect to the annular thin wall portion on the collapsed side Since the breakage of the part surely occurs at an early stage, a constant opening operation of the air hole can be obtained.

It is a whole longitudinal cross-sectional view which shows one embodiment of this invention. FIG. 2 is a bottom view of the example embodiment of FIG. 1. In FIG. 1, it is an enlarged view of an opening functional part. It is an expanded sectional view of the opening functional part in the example of embodiment of FIG. It is the expanded sectional view which looked at the opening functional part of FIG. 4 from the right angle direction. FIG. 5 is an enlarged cross-sectional view showing a protrusion inclination displacement operation of the opening function part of FIG. It is an expanded sectional view which shows the air hole establishment state of the opening functional part of FIG.

Embodiments of the present invention will be described below with reference to the drawings.
The cup-shaped container made of synthetic resin according to the present invention (see FIG. 1) is a thin injection molded product made of polypropylene resin, and has a cylindrical barrel 1 whose diameter is expanded upward, and the barrel 1 is closed at its lower end and gated at the center. A cup-shaped main body portion composed of a bottom plate 3 on which a mark is located, and an outer casing-shaped flange piece 2 that tightly welds a sealing sheet lid to the upper end opening edge of the barrel 1 A leg piece 9 in the form of a short cylinder is suspended from the peripheral end portion of the lower surface 3 b of the bottom plate 3.

  At a portion that is biased toward the peripheral edge of the lower surface 3b of the bottom plate 3 (this portion is the inside of the leg piece 9) (see FIGS. 1 and 2), a part of the bottom plate 3 is broken and air holes 6 are formed. An opening function part 4 (see FIGS. 3 and 4) for opening is formed, and this opening function part 4 is formed so as to surround the protrusion 5 and a protrusion 5 that is erected in a hanging shape. The annular thin portion 7 and the annular thick portion 8 formed so as to surround the annular thin portion 7 are constituted.

  The protrusion 5 of the opening function part 4 is erected at a height lower than the leg piece 9 (see FIG. 1), and its flat cross-sectional shape is an oval shape (see FIG. 3) that is flat in the pushing-down direction. Therefore, it has a shape that makes it easy to apply a pushing force with a fingertip. Further, the base end portion of the protrusion 5 has a circular shape with a diameter increased along the pushing-down direction.

  Further, the annular thin portion 7 is formed in a circular shape surrounding the base end of the projection 5, and the thickness thereof is set to a value that is thinner than the thickness of the bottom plate 3 and is easily broken, and the width thereof is The value is set such that the required bending deformation can be obtained with certainty.

  Further, the annular thick portion 8 is formed in a circular shape with the bottom plate 3 portion surrounding the annular thin portion 7, and the thickness thereof can stably support the annular thin portion 7 that is bent and deformed. The thickness of the bottom plate 3 is locally increased while maintaining the overall thickness of the bottom plate 3 where the thickness is kept to a minimum to save resources.

  Thus, the lower surface 3b portion of the bottom plate 3 in which the opening function portion 4 is formed has a surface structure with severe irregularities due to the opening function portion 4, and in particular, a corner portion is present at the boundary between the protrusion 5 and the annular thin portion 7. In contrast, the upper surface 3a portion of the bottom plate 3 located on the opposite side of the opening function portion 4 has a flat surface structure (see FIG. 4) having no unevenness.

  Next, an example of the dimensional relationship of each part in the opening function part 4 will be described with reference to FIG. The opening function portion 4 is roughly divided into a tilted side and a tilted side with reference to the direction in which the pushing force P acts according to its operating characteristics, so that the annular thin portion 7 is tilted with the tilted thin portion 7a. The side thin part 7b and the annular thick part 8 are roughly divided into a fall side thick part 8a and a fall side thick part 8b.

  The fall-side thin portion 7a has a fall side thin-wall portion thickness t1, and its width is a fall-side thin portion width s1, and the fall-side thin portion 7b has its wall thickness fallen and has a side thin-wall portion thickness. t2, its width is collapsed to the side thin part width s2, and the collapsed side thick part 8a is collapsed to the side thick part thickness t3, and its width is collapsed to the side thick part width s3. The side thick part 8b has a thickness of the side thick part t4 and a side thick part width s4. Note that the thickness of the bottom plate 3 is defined as a bottom plate thickness t5.

  The value of the collapse side thin portion width s1 is larger than the value of the collapse side thin portion thickness t1, and is set to, for example, twice or more. Similarly, the value of the collapsed side thin portion width s2 is also collapsed. Although it is larger than the value of the part thickness t2, for example, it is set to 2 times or more, the size is desirably 8 times or less.

  This depends on the value of the collapsed side thick part thickness t4 and the value of the collapsed side thin part thickness t1, but the value of the collapsed side thin part width s2 is collapsed and is twice the thin side wall thickness t2. By doing so, the protrusion 5 is prevented from striking against the annular thick part 8 before the fall side thin part 7a breaks, and the value of the fall side thin part width s1 is similarly set to the fall side thin part thickness. By setting it to twice or more the value of t1, it is easy to apply internal stress to the fall side thin portion 7a, thereby making it easier to open the air hole 6.

  In addition, by setting the value of the collapse side thin portion width s1 to be equal to or less than eight times the value of the collapse side thin portion thickness t1, it is possible to reliably generate the necessary internal stress, so that the collapse side thin portion 7a It is prevented from becoming too easy to bend and deform, and similarly, the value of the side thin portion width s2 is lowered and the side thin portion thickness t2 is set to be eight times or less, so that necessary internal stress is reliably generated. In this way, when the protrusion 5 is pushed down, the side thin portion 7b is surely functioned as a fulcrum so that a stable opening of the air hole 6 is obtained.

  The fall side thin part width s1 is set to a value equal to or smaller than the fall side thin part width s2. Thereby, the tilted fulcrum of the protrusion 5, that is, the tilted-side thin portion 7 b that functions as a hinge tends to bend and deform appropriately, and does not rigidly support the protrusion 5 that is inclined and is flexible. On the other hand, the tilted thin-walled portion 7a is not stretched and deformed, but breaks after being properly stretched and deformed.

  For this reason, the breaking of the annular thin portion 7, that is, the opening of the air hole 6 is not achieved at a stroke in an impact, but the progress speed of the inclined displacement of the protrusion 5 during the flexible bending deformation of the annular thin portion 7. Therefore, the opening operation of the air hole 6 having a good touch can be obtained.

  The annular thick portion 8 is formed to have a larger thickness than the annular thin portion 7 so that the annular thin portion 7 which is deformed and deformed can be stably supported. Is at least 0.1 mm in terms of formability and management, and is actually set to a value of around 0.15 mm. On the other hand, the thickness of the annular thick portion 8 is 0.4 mm to 1 mm. Since it is formed to a thickness of 0.0 mm, the ratio of the thickness of the annular thick portion 8 and the thickness of the annular thin portion 7 is set within a range of 2-10.

  In particular, since the fall side thick part 8a needs to stably support the fall side thin part 7a that bends and deforms, the fall side thick part thickness t3 is sufficiently larger than the fall side thin part thickness t1. It is desirable to increase the magnification, and if necessary, the magnification is close to 10 times so that a stable supporting action can be exhibited with respect to the collapsed thin portion thickness t1.

  The collapsed-side thin part thickness t2 is set to a value equal to or greater than the collapsed-side thin part thickness t1. For this reason, the tilted-side thin portion 7b has higher rigidity than the tilted-side thin portion 7a, and functions as a hinge by providing a stable fulcrum portion for the tilted and displaced projection 5 and thereby the projection 5 Will be stably tilted and displaced.

  The thickness of the annular thick portion 8 is set to a large value with respect to the bottom plate thickness t5. The bottom plate thickness t5 can provide a high resource saving effect in a state where the thickness of the annular thick portion 8 is set to such an extent that the function as a support portion for the annular thin portion 7 can be stably exhibited. The range is kept to a minimum, thereby maintaining the resource saving effect of the molding material.

Next, the opening operation of the air holes 6 in the opening function unit 4 will be described in order.
The container filled and stored with the contents is placed upside down on the receiver with the sealing sheet of the opening peeled off, and the center of the bottom plate 3 is placed on the projection 5 of the opening function part 4 in this state. A pushing force P toward the part is applied (see FIG. 6).

  By the action of the pushing force P, the protrusion 5 inclines the posture while bending and deforming the annular thin portion 7, but the inclination displacement of the projection 5 is performed with the side thin portion 7b as a fulcrum. The part 7 is deformed by bending the collapsed thin-walled part 7a into a deformed deformed state and the deformed side thin-walled part 7b in a compressed deformed form (see FIG. 6).

  At this time, the internal stress generated by the bending deformation is concentrated on the connection corner of the protrusion 5 and the annular thin portion 7, but the internal stress acting on the tilted side corner m (see FIG. 6) is the stretching direction. Therefore, the internal stress acting on the side corner n (see FIG. 6), which is tilted oppositely, acts in the crushing direction, and thus does not act strongly as the breaking force.

  For this reason, when the inclination displacement of the protrusion 5 is pushed forward, the fracture of the annular thin portion 7 starts from the side corner portion m, and this fracture is tilted and proceeds toward the side thin portion 7b, thereby opening the air hole 6 ( As shown in FIG. 7, the content is taken out by dropping under its own weight.

  In the embodiment shown in FIG. 7, the protrusion 5 formed by breaking the air hole 6 is connected to the annular thin portion 7, but this is tilted and the side thin portion 7 b is inclined and displaced as a fulcrum portion, that is, a hinge. Since the projection 5 is supported, this reliably prevents the occurrence of inconvenience that the projection 5 is depressed and displaced to damage the contents when the air hole 6 is opened.

  In addition, as described above, it has been described that, when the protrusion 5 is pushed down, the tilted side thin portion 7b is bent and deformed in a compressive deformation state, but precisely, the top side of the tilted side thin portion 7b is slight. Elongates and becomes deformed. However, the upper surface side of the opening function portion 4 is formed by the upper surface 3a of the bottom plate 3, and since the whole is a flat surface, the corner portion where the generated internal stress tends to concentrate is not formed. Therefore, the breakage that opens the air hole 6 always occurs from the vicinity of the inclined side corner portion m.

  As described above, the cup-like container according to the present invention has a structure in which the annular thin portion that is opened by breaking the air hole by the protrusion has a width that can be bent and deformed, thereby allowing air to escape from the strong resistance due to the bending deformation. It is possible to break and open holes, and it can be expected to be used widely as a technology for taking out semi-solid contents that are tightly packed and stored.

1; barrel 2; flange 3; bottom plate 3a; upper surface 3b; lower surface 4; opening function part 5; projection 6; air hole 7; annular thin part 7a; Annular thick part 8a; fall side thick part 8b; fall side thick part 9; leg piece t1; fall side thin part thickness s1; fall side thin part width t2; fall side thin part thickness s2; Depressed side thick part width s3; Defeated side thick part width t4; Defeated side thick part thickness s4; Defeated side thick part width t5; Bottom plate thickness m; Part n: Defeated side corner P: Pushing force

Claims (5)

An opening function part is formed on a part of the lower surface of the bottom plate with the leg pieces suspended, and the opening function part is formed on a protrusion that opens and breaks the air hole by pushing down, and on the bottom plate part around the protrusion. The annular thin portion that is broken by pushing down the protrusion, and setting the thickness of the annular thin portion to a value that is easier to break than the bottom plate, and the width of the annular thin portion is slightly An annular thick portion is formed on the bottom plate portion around the annular thin portion, the thickness of the bottom plate portion being increased, and the thickness of the annular thick portion is set to a value that allows bending deformation. Synthetic resin cup-shaped container having a thickness of 2 to 10 times the wall thickness . The synthetic resin cup-shaped container according to claim 1, wherein the upper surface portion of the bottom plate located on the opposite side of the lower surface portion on which the opening function portion is formed is formed into a flat surface shape. The synthetic resin cup-shaped container according to claim 1 or 2 , wherein the value of the width of the annular thin portion is set larger than the value of the thickness of the annular thin portion. Either defeated side forces beat projections is the side which acts the width of the annular thin portion, the width of the thin annular portion of the side where the protrusions are brought down, equal to or smaller claims set to a value from 1 to 3 A synthetic resin cup-shaped container according to claim 1. The thickness of the thin annular portion of the tilted side forces beat projections is the side which acts, claim 1-4, wherein the projection is set to equal to or smaller and the thickness of the thin annular portion of the side to be brought down 2. A synthetic resin cup-shaped container according to item 1.

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