JP6211894B2 - Plastic container - Google Patents

Description

  The present invention relates to a synthetic resin container that contains viscous semi-solid contents such as pudding, jelly, water sheep lees, agar, etc., and is particularly suitable for freely forming an air hole for taking out semi-solid contents. The present invention relates to a synthetic resin container.

  Viscous semi-solid foods such as pudding, jelly, water sheep cake, and agar have been popular for many years as desserts. In particular, when these semi-solid foods are provided at restaurants, there are many cases in which frustoconical puddings, jellies, etc. are placed on a plate, and the image has already been established among consumers. For this reason, there is a need for semi-solid food that is housed in a synthetic resin container and sold in a retail store in the same manner on a plate.

  From such a background, a synthetic resin container capable of easily dropping a semi-solid food onto a dish has been proposed. These synthetic resin containers are usually configured in a state in which a semi-solid food can be accommodated in a main body portion formed of a cylindrical side wall and a bottom plate, and a protrusion protrudes downward from the bottom plate. When actually dropping the semi-solid food from the synthetic resin container onto the plate, the semi-solid food is placed on the plate so as to be inverted after removing the upper lid. And an air hole is formed in the bottom plate of a container by pushing down this protrusion. As a result, air comes into the container from the air hole. When air flows between the bottom plate and the semi-solid food that are in close contact with each other and in a vacuum state, the vacuum state is eliminated, and the semi-solid food falls from the container by its own weight. Thereby, a semi-solid food will be suitably arranged on a plate.

  Particularly in recent years, intensive studies have been conducted on how to comfortably push down the protrusion protruding downward on the bottom plate of the synthetic resin container with a light force, and the synthetic resin container described below has been proposed. .

  Patent Document 1 proposes a food container in which a main body portion formed of a cylindrical side wall and a bottom plate, a pin protruding from the bottom plate, and a concave wall surface capable of inverting the bottom plate are formed. According to the technology disclosed in Patent Document 1, an annular notch groove is engraved on the top surface of the bottom plate along the periphery of the base portion of the pin, so that it can be pushed down with a light force. The high content can be separated from the side wall.

  In the disclosed technique of Patent Document 2, as shown in FIG. 15, a projection 86 and a thin-walled region 88 and an arm portion 89 thicker than the region 88 are formed on a main body bottom surface portion 87 connected to the base of the projection 86. It is. When the projection 86 is actually pushed down, the arm portion 89 is pressed as a fulcrum, so that a crack can be introduced from the thin region 88 and cut to form an air hole. The pushed projection 86 is connected through a thick arm 89 serving as a fulcrum.

  In the technology disclosed in Patent Document 3, a thin region is provided between the base of the protrusion and the bottom surface of the main body. Incidentally, this thin region is formed by providing a notch groove from the upper surface side of the bottom plate. In addition to this, in the disclosed technique of Patent Document 3, the planar shape of the protrusion is optimized so that the protrusion can be pushed down with a lighter force.

  As shown in FIG. 16, the disclosed technique of Patent Document 4 includes a projection 95, an annular thin portion 97 formed around the projection 95, and an annular thick portion 98 formed on the outer periphery of the annular thin portion 97. have. The annular thin portion 97 is configured to be thinner than the proximal end portion of the protrusion 95 and the annular thick portion 98. When a pushing force is applied to the projection 95, one annular thin portion 97 is crushed as a fulcrum, the other annular thin portion 97 is broken, and an air hole is formed in the bottom surface of the main body. .

JP 2000-41608 A JP 2007-269358 A JP 2008-168946 A JP 2011-51598 A

  However, according to the disclosed technique described in Patent Document 1 described above, it is necessary to separately provide a reversible concave wall surface in addition to the pins, and there is a problem that the manufacturing process increases accordingly.

  Further, according to the technology disclosed in Patent Document 2, when the protrusion 86 is pushed down, the thin region 88 is broken, but in addition to this, the thin region 88a formed between the two arm portions 89 serving as fulcrums. May break as well. In such a case, the region 88a protrudes inside the main body bottom surface portion 87 when pushed down. As a result, the region 88a protruding to the inside of the container may come into contact with the semisolid food contained in the container.

  Further, according to the technique disclosed in Patent Document 3, the thin region is formed by providing a notch groove from the upper surface side of the bottom plate. For this reason, as for the semi-solid food accommodated in a container, the unevenness | corrugation according to the form of this notch groove may be formed in the surface.

  Furthermore, according to the technique disclosed in Patent Document 4, since the annular thin portion 97 serving as a fulcrum is configured with a thin wall as described above, there is a possibility that the fulcrum may be broken when a pushing force is applied. . As a result, the broken fulcrum portion protrudes to the inside of the container and may come in contact with the semi-solid food contained in the container.

  That is, in proposing a synthetic resin container capable of dropping semi-solid food onto a plate, it is necessary to first prevent contact with the semi-solid food contained in the container when the protrusion is pushed down. There is. In addition to this, in the semi-solid food housed in the container, it is necessary to prevent the unevenness corresponding to the shape of the notch groove from being formed on the surface. In particular, when the semi-solid food is pudding, it is the black caramel sauce that contacts the bottom plate of the container. If attached, it will be very noticeable when placed on a plate.

  Further, in proposing a synthetic resin container capable of dropping semi-solid food onto a dish, it is necessary to further improve the ease of pushing down the protrusion. In particular, in recent years, there has been a demand for using cheaper polypropylene as a material for the synthetic resin constituting the container. However, polypropylene has a higher material viscosity than polystyrene. For this reason, when using polypropylene as the synthetic resin material constituting the container, it is difficult to form air holes in the bottom plate unless the ease of pushing down the protrusions is further improved as compared with the case of using polystyrene. .

  By the way, in the prior art, when the projection is pushed down, it is easy to push down the projection even when polypropylene is used as the synthetic resin material constituting the container while preventing contact with the semi-solid food contained in the container. No real synthetic resin container has been proposed yet.

  Therefore, the present invention has been devised in view of the above-mentioned problems, and the object of the present invention is a synthetic resin that contains viscous semi-solid contents such as pudding, jelly, chicken pox, and agar. To provide a synthetic resin container capable of further improving the push-down property of the protrusion while preventing the contact with the semi-solid food contained in the container, particularly when the protrusion is pushed down. is there.

  In order to solve the above-mentioned problems, the present inventor has a protrusion protruding outward from the bottom plate in the main body, and a thin groove and a thick groove are provided on both sides via the protrusion, and the thick groove is a thin groove. The present invention invented a synthetic resin container that is made thicker than that, and has a groove bottom that is flat and at least a side of the flat that is close to the protrusion is straight.

  The container made of synthetic resin according to claim 1 is provided on both sides of the main body having a cylindrical side wall and a bottom plate, a protrusion protruding outward from the bottom plate in the main body, and the protrusion through the protrusion. A thin groove and a thick groove respectively cut out from the outer surface side of the bottom plate, the thick groove being thicker than the thin groove, the bottom of the groove being a flat surface, and at least the protrusions on the flat surface A side that is close to is characterized by a straight line.

  The synthetic resin container according to claim 2 is the invention according to claim 1, wherein the thick groove is formed with a first taper in a direction away from the protrusion from the groove bottom, and the thin groove Is characterized in that a second taper that is steeper than the first taper is formed in a direction away from the protrusion.

  The synthetic resin container according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the plane of the groove bottom is substantially parallel to the surface of the bottom plate.

The synthetic resin container according to claim 4 is the invention according to any one of claims 1 to 3, wherein the flat surface of the groove bottom of the thick groove is a pressing direction of the protrusion toward the thick groove. is a rectangular shape substantially parallel direction to the short side with respect to the length of the short side in the plane of the groove bottom, characterized in that it is a 0.1 to 2.0 mm.

The synthetic resin container according to claim 5 is the invention according to any one of claims 1 to 4 , wherein the bottom plate is provided with a gate position in the vicinity of the thick groove rather than the thin groove. It is characterized by that.

A synthetic resin container according to a sixth aspect is the invention according to any one of the first to fifth aspects, wherein when the projection is pressed toward the thick groove side, the entire flat surface of the groove bottom portion is provided. Is bent in the pressing direction as a fulcrum.

  According to the present invention having the above-described configuration, a thin groove and a thick groove are provided on both sides via the protrusion, and a pressing force is applied to the protrusion by making the thick groove thicker than the thin groove. In some cases, the so-called lever principle can effectively apply a tensile stress to the thin groove, and even when a compressive stress is applied to the thick groove, it can be bent without breaking. Become.

  In addition, by making the groove bottom of the thick groove flat, even when a compressive stress is applied to the thick groove, the entire flat surface can act as a fulcrum, improving the ease of pushing down the protrusion. It is also possible to bear the swelling of the meat accompanying the compressive stress on the plane side, the swelling of the meat to the back side with respect to the plane can be suppressed, and the semi-solid contents contained in the container are wrinkled. It can prevent adhesion. In addition, by making at least the side of the plane close to the protrusion straight, it can function as a starting point of a bending moment, and the ease of pushing down the protrusion can be improved.

It is a perspective view of a synthetic resin container to which the present invention is applied. It is a sectional side view of the synthetic resin container to which the present invention is applied. It is a bottom view of the synthetic resin container to which the present invention is applied. It is an expansion perspective view of the protrusion provided in the synthetic resin container to which the present invention is applied. It is a top view of the protrusion provided in the synthetic resin container to which the present invention is applied. It is AA 'sectional drawing of FIG. It is BB 'sectional drawing of FIG. It is a figure which shows the other structural example of the thin groove | channel provided in the synthetic resin containers to which this invention is applied. It is a figure for demonstrating the method to shape | mold the synthetic resin container to which this invention is applied. It is a figure for demonstrating the flow of the synthetic resin in the process of shape | molding the synthetic resin containers to which this invention is applied. (A) is a perspective view at the time of pressing a protrusion from the fingertip toward the pressing direction C, and (b) is a side sectional view thereof. (A) is a perspective view in the case where the protrusion is further pressed from the fingertip in the pressing direction C, and (b) is a side sectional view thereof. It is a figure for demonstrating the aspect which a thin groove | channel fractures | ruptures. It is a figure shown about the case where a protrusion is pushed down toward the press direction C. FIG. It is a figure for demonstrating the indication technique of patent document 2. FIG. FIG. 10 is a diagram for explaining a technique disclosed in Patent Document 4.

  Hereinafter, embodiments of a synthetic resin container to which the present invention is applied will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view of a synthetic resin container 1 to which the present invention is applied, FIG. 2 is a side sectional view thereof, and FIG. 3 is a bottom view thereof.

  The synthetic resin container 1 is a bottomed cylindrical container, and is a container for containing viscous semi-solid contents such as pudding, jelly, water sheep lees, and agar. The synthetic resin container 1 is configured such that a semi-solid content can be accommodated in a main body 10 having a cylindrical side wall 11 and a bottom plate 16, and the main body 10 is further connected to the upper end of the side wall. It has a flange 15 and a foot 12 protruding outward from the bottom plate 16. The synthetic resin container 1 further includes a protrusion 2 protruding outward from the bottom plate 16, and a gate position 18 is provided at the approximate center of the bottom plate 16.

  The material constituting the synthetic resin container 1 is made of synthetic resin such as polystyrene, polypropylene, polycarbonate, polyethylene, polyethylene terephthalate, and acrylic (PMMA). The synthetic resin container 1 is manufactured by injection molding which will be described later, and the shape described below is integrally formed.

  The synthetic resin container 1 is erected via the foot 12 so that the flange 15 is at the upper end during distribution and sales. On the other hand, when the semi-solid contents are to be placed on a plate, the semi-solid contents are placed with the bottom plate 16 facing directly upward and the flange 15 at the lower end. In the following FIGS. 1-3, it demonstrates taking the form in the latter case as an example.

  Since the side wall 11 has a shape that is reduced in diameter as it approaches the bottom plate 16, the shape of the semi-solid content can be finished in a substantially truncated cone shape. The shape of the side wall 11 may be arbitrarily provided with irregularities, curved surfaces, steps, etc. in order to visually enhance the characteristic shape when the semi-solid content is placed on a plate.

  The flange 15 has a surface substantially parallel to the bottom plate 16 so that the container can be sealed when the semi-solid content is accommodated. Usually, the flange 15 is distributed and sold with a seal (not shown) attached thereto. And the sticker which is not shown in figure stuck on this flange 15 will be peeled off at the time of the eating and drinking by a consumer.

  The bottom plate 16 has protrusions 2 and feet 12 formed on the outer surface of the container, while the inner side of the container is a smooth surface. By configuring the inner surface of the bottom plate 16 to be smooth, it is possible to prevent the unevenness corresponding to the form of the bottom plate 16 from being formed on the semi-solid contents that are in close contact with the bottom plate 16. be able to. The outline of the bottom plate 16 in a bottom view may reflect a geometric pattern as shown in the bottom view of FIG. 3 or may have a normal shape such as a circle or a rectangle. .

  The foot portion 12 is provided to support the main body portion 10 that is placed through the bottom end of the foot portion 12 and accommodates the semi-solid content when displayed at the storefront. The foot portion 12 is provided around the protrusion 2, and has a role of protecting the protrusion 2 by configuring the height higher than that of the protrusion 2. As shown in FIG. 3, the foot 12 is formed to be annular when viewed from the bottom, but is not limited to this, and is embodied as a set of protruding pieces separated into a plurality of pieces. It may be. Further, the foot portion 12 can stably support the main body portion 10 by projecting in the vicinity of the peripheral end portion of the bottom plate 16, but is not limited to this, and any outer surface of the bottom plate 16 may be used. It may be provided at any location.

  Next, the structure of the protrusion 2 protruding outward from the bottom plate 16 will be described. The protrusion 2 is pushed down by the consumer when the semi-solid content accommodated in the main body portion 10 is easily dropped on the dish. FIG. 4 is a perspective view of the protrusion 2, and FIG. FIG. 6 is a plan view of the protrusion 2, FIG. 6 is a sectional view taken along the line AA ′, and FIG. 7 is a sectional view taken along the line BB ′.

  The protrusion 2 is formed in a shape in which the diameter is increased from the tip 2a to the root portion 2c. Since the tip 2a of the protrusion 2 lacks safety when sharpened, it is formed of a flat surface or a curved surface. The protrusion 2 shown in FIG. 4 is configured to have a truncated pyramid shape, but is not limited thereto. As shown in FIG. 6, the middle abdominal part 2b of the protrusion 2 is formed in a straight line shape so that the pressing force when a finger is put on the protrusion is more easily applied. The root portion 2c of the protrusion 2 is configured so that the diameter is further increased rapidly, and the cross-sectional shape is formed to be nearly circular.

  Incidentally, in the present embodiment, it is assumed that the pressing direction of the protrusion 2 is the direction C in the figure. The cross-sectional shape of the protrusion 2 and its tip 2a is also configured such that the major axis direction is perpendicular to the direction C as shown in FIG. It becomes possible to make it act.

  A thin groove 22 and a thick groove 21 are provided around the root portion 2 c of the protrusion 2. The thin groove 22 and the thick groove 21 are cut out from the outer surface side of the bottom plate 16. The thick groove 21 is formed with a first taper 23 in a direction C which is a direction away from the protrusion from the groove bottom. Further, the thin groove 22 is formed with a second taper 24 in a direction D away from the protrusion 2. Incidentally, the direction C is different from the direction D by 180 °.

  The groove bottom of the thick groove 21 is constituted by a flat surface 21 a that is substantially parallel to the inner surface or the outer surface of the bottom plate 16. The flat surface 21a at the bottom of the thick groove 21 is rectangular in plan view as shown in FIG. The short side of the rectangular flat surface 21a constituting the groove bottom of the thick groove 21 is parallel to the direction C, and the long side is extended in the direction orthogonal to the direction C. Of the long sides of the rectangle constituting the plane 21a, when the side closer to the protrusion 2 is the long side 21b and the piece on the side away from the protrusion 2 is the long side 21c, the long side 21b is viewed in plan view. It is indispensable to have a straight line. On the other hand, the long side 21c is preferably linear in a plan view, but is not limited to this, and may be another curved shape. Further, the flat surface 21a is not limited to the case where the flat surface 21a is substantially parallel to the inner surface or the outer surface of the bottom plate 16, but is inclined with respect to the inner surface or the outer surface of the bottom plate 16 as long as it is flat. Also good.

  Further, since the long side 21b is linear in plan view, the groove side surface 31 formed from the thick groove 21 to the protrusion 2 is configured to be substantially perpendicular to the flat surface 21a. Also good.

  Note that the length of the long sides 21b and 21c of the flat surface 21a in the thick groove 21 is 30 to 180 °, preferably 75 to 105 °, more preferably 85 to 95 from the center P of the protrusion 2 shown in FIG. The angle is in the range of °, more preferably 90 °. Further, the thickness of the thick groove 21 is 0.2 to 2.0 mm. The thickness of the thick groove 21 is 0.3 to 0.00 mm, for example, when the thickness of the bottom plate 16 is about 0.7 mm. It is 5 mm, more preferably 0.4 mm. The length of the short side of the flat surface 21a in the thick groove 21 is 0.1 to 2.0 mm. Desirably, when the plate thickness of the thick groove 21 is 0.3 to 0.5 mm, the length of the short side of the flat surface 21a in the thick groove 21 is 0.3 to 0.5 mm. Yes.

  The thin groove 22 is thinner than the thick groove 21. Since both the thick groove 21 and the thin groove 22 are cut from the bottom surface of the bottom plate 16, the difference in thickness means the thickness from the bottom of the groove to the inner surface of the bottom plate 16. The groove bottom portion of the thin-walled groove 22 may be configured by a plane that is substantially parallel to the inner surface or the outer surface of the bottom plate 16, but is not limited thereto, and may not be a plane. . As shown in FIG. 5, the thin groove 22 has an arc shape with the center P of the protrusion 2 as a base point in plan view. Then, both ends of the arc-shaped thin groove are connected to the thick groove 21 described above. However. The thin groove 22 is not limited to such a circular arc shape, and may be configured in any other shape. The thickness of the thin groove 22 is 0.05 to 0.2, preferably 0.08 to 0.12 mm, and more preferably about 0.1 mm. mm. The groove side surface 31 formed from the thin groove 22 to the protrusion 2 may be configured to be substantially perpendicular to the bottom surface of the thin groove 22.

  Incidentally, the positional relationship between the thick groove 21 and the thin groove 22 is specified via the protrusion 2. In other words, the thick groove 21 and the thin groove 22 are provided on both sides (direction C side and direction D side) via the protrusion 2. The direction in which the pressing force is applied to the protrusion 2 is specified as one direction (direction C), and the thick groove 21 is provided on the direction C side. And the thin groove | channel 22 is provided in the direction D side 180 degrees different from the direction C. As shown in FIG. As described above, the thick groove 21 and the thin groove 22 may be configured in any positional relationship as long as they are provided on both sides via at least the protrusion 2. As long as such a positional relationship is satisfied, for example, the thin groove 22 is not limited to the case where one groove is continuous, and a plurality of grooves are intermittently formed as shown in FIG. It is also possible to provide the same effect as that of one groove. Further, even if the end of the thin groove 22 is not connected to the thick groove 21, substantially the same effect can be exhibited.

  The first taper 23 is gently inclined upward in the direction C from the long side 21 c of the thick groove 21. The first taper 23 continues to the bottom surface of the bottom plate 16.

  The second taper 24 is inclined outward from the outer periphery of the thin groove 22 toward the bottom surface of the bottom plate 16. Since the thin groove 22 is configured to have an arc shape in plan view, the second taper 24 is similarly formed in an arc shape in plan view on the outer periphery of the thin groove 22. The second taper 24 is steeper than the first taper 23.

  Next, the manufacturing method of the synthetic resin container 1 having the above-described configuration will be described. When molding the synthetic resin container 1, a pair of molds constituted by a movable mold 71 and a fixed mold 72 is used as shown in FIG. 9. The movable mold 71 has a resin melting part 33 for melting the synthetic resin at a high temperature and an injection part 34 for injecting the synthetic resin melted in the resin melting part 33 to the outside. An outer surface mold 35 is formed in advance on the movable mold 71. The outer surface mold 35 is preliminarily formed with a mold corresponding to the appearance of the side wall 11 and the bottom plate 16 and the shape of the protrusion 2 and the foot 12. Further, an inner surface mold 36 corresponding to the inner surface shape of the side wall 11, the bottom plate 16 and the like is formed in the fixed mold 72 in advance.

  When injection molding is actually performed using such a movable mold 71 and a fixed mold 72, these are brought into contact with each other, and the molten resin is injected from the injection section 34 at a high pressure. As a result, the molten resin flows into the gap between the outer surface mold 35 and the inner surface mold 36. After the molten resin is cured, the movable mold 71 is separated from the fixed mold 72, and the molded synthetic resin container 1 is taken out. The resultant synthetic resin container 1 is formed into a shape corresponding to the outer surface mold 35 and the inner surface mold 36.

  In the molding process, the gate position 18 at the substantially center of the bottom plate 16 in the synthetic resin container 1 is a location corresponding to the injection portion 34. The synthetic resin flowing in from the gate position 18 flows from the gate position 18 at the center toward the foot 12 at the peripheral end. As shown in FIG. 10, the flow of the synthetic resin around the protrusion 2 in the process is as shown by the arrow L, and the flow of the synthetic resin around the protrusion 2 and the thick groove 21 and the thin groove 22 As shown, the projections 2, the thick grooves 21, and the thin grooves 22 are propagated to flow. Among these, the synthetic resin flowing through the arrow M flows while sequentially filling the thick groove 21, the protrusion 2, and the thin groove 22, but the synthetic resin first reaches the thick groove 21. It is. The thick groove 21 has a large thickness, and the length of the long sides 21b and 21c is set within a range of 30 to 180 ° from the center P of the protrusion 2, and the volume is securely secured. It has become. For this reason, the synthetic resin flowing in the arrow M does not clog the resin in the thick groove 21 and the filling progresses smoothly and fills the protrusion 2 and the thin groove 22 as they are, and a portion N slightly away from the thin groove 22. , The synthetic resin from the direction of the arrow L that has just detoured will join. As a result, the confluence of the weld lines is formed at the location N, and the formation of the confluence at the protrusion 2 and the thin groove 22 can be prevented. That is, it is possible to prevent a difference between the flow velocity of the synthetic resin flowing through the arrow M and the flow velocity of the synthetic resin flowing through the arrow L, and the weld line confluence is formed in the protrusion 2 or the thin groove 22. It is possible to prevent a defect source from being introduced into these.

  Next, the pushing-down operation of the protrusion 2 in the synthetic resin container 1 to which the present invention is applied will be described.

  When the protrusion 2 is pushed down, the top cover attached to the flange 15 is removed, and then placed on a dish (not shown) with the bottom plate 16 facing up and the flange 15 facing down. To do. In this state, the protrusion 2 is pressed from the fingertip 5 in the pressing direction C as shown in FIG. In such a case, the fingertip 5 is hooked on the middle abdomen 2b of the protrusion 2 and pressed toward the C direction. Incidentally, the position of the protrusion 2 where the fingertip 5 is hooked and in which direction the fingertip 5 is pressed may be described with reference to the bottom plate 16 or the like, for example.

  When a pressing force in the C direction is applied to the protrusion 2, the region P including the thick groove 21 is subjected to compressive stress, and the region Q including the thin groove 22 is subjected to tensile stress. The groove side surface 31 close to the thin groove 22 is configured to be substantially perpendicular to the bottom surface of the thin groove 22, and the second taper 24 is configured to be steeper than the first taper 23. For this reason, the thin groove 22 is configured to have an acute angle between the groove side surface 31 and the second taper 24. When a tensile stress is applied to the thin groove 22 having such an acute angle, the stress is concentrated at the bottom 46 of the thin groove 22.

  Further, when a pressing force in the C direction is applied to the protrusion 2, as shown in FIG. 11B, the long side 21b in the plane 21a is linear in a plan view. Since the pressing direction C is substantially perpendicular to the long side 21b, when the pressing force is applied to the protrusion 2 in the direction C and, as a result, a compressive stress is applied, the long side 21b is just the starting point. Thus, a bending moment is applied. At this time, since the groove side surface 31 is formed so as to be substantially perpendicular or steep to the flat surface 21a, the long side 21b is more likely to act as a starting point of the bending moment when compressive stress is applied.

  In this state, when the pressing force in the C direction from the fingertip 5 to the projection 2 is further increased, the thin groove 22 is configured to be thinner than the thick groove 21 as described above. For this reason, as shown in FIG. 12A, the bottom 46 of the thin groove 22 cannot withstand this tensile stress, resulting in breakage. The thin groove 22 is subjected to the largest tensile stress in the region Q perpendicular to the C direction in the plan view shown in FIG. Then, the breakage proceeds from the region Q as the starting point along the thin groove 22 in the direction of the arrow in the figure. Since the thin groove 22 is configured to have an arc shape in a plan view, when the pressing force in the C direction is applied to the protrusion 2, the break along the thin groove 22 proceeds more smoothly. Is possible. The fracture along the thin groove 22 progresses toward the thick groove 21 as shown in FIG. Since the thick groove 21 is thicker than the thin groove 22, the break along the thin groove 22 stops when it reaches the thick groove 21. As a result, the protrusion 2 is supported so as to continue to the bottom plate 16 only through the thick groove 21. Further, the air holes 6 are newly formed in the bottom plate 16 by pushing down the protrusions 2 while breaking the thin-walled grooves 22.

  Further, the thick groove 21 is bent in the pressing direction C as shown in FIG. 12 when the long side 21b acts as a bending start point. Since the flat surface 21a of the thick groove 21 is thinner than the bottom plate 16, the entire flat surface 21a is bent. As a result, the entire flat surface 21a of the thick groove 21 to be bent acts as a fulcrum. As shown in FIG. 5, the flat surface 21 a extends from the center P of the protrusion 2 to 30 to 180 °. As a result, the pressing force toward the direction C can be dispersed on the flat surface 21a, and the entire flat surface 21a can bear a compressive force relatively evenly. In addition to this, the entire flat surface 21a acts as a fulcrum, so that a tensile stress can be effectively applied to the thin groove 22 by the so-called lever principle. For this reason, when pushing down the protrusion 2 in the C direction, the pressing effect can be further enhanced. Therefore, according to the present invention, the ease of pushing down the protrusion 2 can be further improved as compared with the prior art. Even if the material constituting the synthetic resin container 1 is a highly viscous material such as polystyrene, according to the present invention having the above-described configuration, the protrusion 2 can be easily pushed down. Incidentally, the flat surface 21a is in the range of 75 ° to 105 °, more preferably 85 to 95 ° from the center P of the protrusion 2, so that the above-described effects are more preferably exhibited.

  If the flat surface 21a is less than 30 ° from the center P of the protrusion 2, the length of the long sides 21b and 21c of the flat surface 21a is too short with the protrusion 2, and the pressing force from the protrusion 2 is good. It cannot be dispersed and carried by the flat surface 21a, and as a result, the entire flat surface 21a cannot be used stably as a fulcrum. On the other hand, when the plane 21a exceeds 180 ° from the center P of the projection 2, the length of the long sides 21b and 21c of the plane 21a is too long relative to the projection 2, and the circle Since the ratio occupied by the arc-shaped thin groove 22 is reduced, the area of the air hole 6 formed by pushing down the protrusion 2 is reduced. For this reason, it is desirable that the lengths of the long sides 21b and 21c of the plane 21a are in the above-described range. At this time, by further setting the length of the short side of the plane 21a to 0.1 to 2.0 mm, and more preferably 0.3 to 0.5 mm, the desired level in the plane 21a described above can be obtained. The effect can be exhibited more suitably.

  When a pressing force is further applied to the protrusion 2 in the C direction, the protrusion 2 is completely pushed down on the bottom plate 16 as shown in FIG. Since the thick groove 21 can bear the pressing force of the protrusion 2 in the C direction relatively uniformly on the entire plane 21a based on the above-described mechanism, the plane 21a is generally directed toward the C direction. Will be bent inward. Further, since the groove bottom of the thick groove 21 is constituted by the flat surface 21a, the swelling of the meat accompanying the compressive stress can be performed on the flat surface 21a side, and the swelling of the meat toward the back surface 21d side with respect to the flat surface 21a is possible. Can be prevented from coming out.

  In addition, the thick groove 21 is thicker than the thinner groove 22, and the first taper 23 continuous from the thick groove 21 is configured more gently than the second taper. For this reason, even when the thick groove 21 is bent and deformed when a compressive stress is applied, the thick groove 21 hardly breaks.

  That is, in the process of bending deformation, the thick groove 21 can suppress the bulging of the meat toward the inner surface 21d side and can prevent breakage, so that a part of the protrusion 2 comes into contact with or enters into the container. Can be prevented. As a result, it is possible to prevent a part of the protrusions 2 from coming into contact with the semi-solid content stored in the container and to prevent the soot from adhering, and the impurities are not attached to the semi-solid content. In terms of surface performance.

  That is, the thick groove 21 has a groove bottom formed by a flat surface 21a and a long side 21b close to the protrusion 2 formed by a straight line, thereby creating a bending deformation starting point and functioning as a fulcrum for the entire flat surface 21a. By making it, it is set as the structure which can prevent that this fractures | ruptures, ensuring the bendability.

  Even in the state where the protrusion 2 is pushed down, the first taper 23 is gently configured, and the rising angle of the root portion 2c of the protrusion 2 is configured to be steeper so that they collide with each other and interfere with each other. It can be prevented that it becomes an obstacle at the time of pushing down.

  Further, as the projection 2 is pushed down, the air hole 6 is opened in the bottom plate 16. Air flows into the container from the air hole 6. When the air flows between the bottom plate 16 and the semi-solid content that are in close contact with each other and the semi-solid content, the vacuum state is eliminated, and the semi-solid content falls from the synthetic resin container 1 by its own weight. . As a result, the semi-solid content can be suitably placed on the dish.

DESCRIPTION OF SYMBOLS 1 Synthetic resin container 2 Protrusion 5 Finger tip 6 Air hole 10 Main body part 11 Side wall 12 Foot 15 Flange 16 Bottom plate 18 Gate position 21 Thick groove 22 Thin wall 23 First taper 24 Second taper 31 Groove side surface 33 Resin melting part 34 Injection portion 35 Outer surface die 36 Inner surface die 46 Bottom portion 71 Movable die 72 Fixed die 86 Protrusion 87 Main body bottom surface portion 88 Region 89 Arm portion 95 Protrusion 97 Annular thin portion 98 Annular thick portion

Claims (6)

A main body having a cylindrical side wall and a bottom plate;
A protrusion protruding outward from the bottom plate in the main body,
A thin groove and a thick groove, which are provided on both sides via the protrusions and cut out from the outer surface side of the bottom plate,
The thick-walled groove is made thicker than the thin-walled groove, the groove bottom is flat, and at least the side of the flat surface that is close to the protrusion is straight. . The thick groove has a first taper formed in a direction away from the protrusion from the groove bottom,
The synthetic resin container according to claim 1, wherein the thin groove is formed with a second taper that is steeper than the first taper in a direction away from the protrusion. The synthetic resin container according to claim 1 or 2, wherein a plane of the groove bottom is substantially parallel to the surface of the bottom plate. The flat surface of the bottom of the thick groove has a rectangular shape with a short side substantially parallel to the pressing direction of the protrusion toward the thick groove, and the length of the short side of the flat surface of the groove The synthetic resin container according to any one of claims 1 to 3 , wherein is 0.1 to 2.0 mm. The synthetic resin container according to any one of claims 1 to 4 , wherein the bottom plate is provided with a gate position in the vicinity of the thick groove rather than the thin groove. When the above projections are pressed toward the thick groove side, of any one of claims 1-5 in which the entire plane of the groove bottom, characterized in that it is bent in the pressing direction as a fulcrum Synthetic resin container.

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