JP5462004B2 - Volumetric resin molding - Google Patents

Description

  The present invention relates to a resin molded product molded into a box shape or a bowl shape, and more particularly to a resin molded product that can maintain the state when its volume is reduced and does not return to its original state. .

  In recent years, resin-molded products such as lunch boxes, cup containers, and various trays have come in handy as so-called “disposable” packaging containers because they can be provided at low cost, and various proposals that can be used for various applications. Has been.

  Such a resin molded product is devised to increase rigidity with a small amount of material (for example, to make a rib or to have a complicated shape) It enables storage and transportation at low cost.

  Since such a resin molded product is used to store articles, a predetermined volume is required when used, but it is preferable to reduce the volume as much as possible when discarding from the viewpoint of “reduction of dust”. . In order to reduce the volume in such a predetermined case, it is referred to as “volume reduction” below. However, as such volume reduction, for example, “container with variable internal volume” in Patent Document 1 And "Folding structure of folding container" of Patent Document 2 has already been proposed.

Japanese Utility Model Publication No. 61-91513 Japanese Examined Patent Publication No. 4-76870

  The “container with variable internal volume” disclosed in Patent Document 1 “can change the internal volume from a small volume state to a large volume state very easily and can maintain the once changed volume state, It was made for the purpose of “providing a container that can be crushed again into a small volume after use”. As shown in FIGS. 10 (a) and 10 (b), And a plurality of convex or concave embosses are formed on the outer periphery of the curved wall portion, whereby the curved wall portion is From the state where the large-diameter cylindrical portion is folded into the radial cylindrical portion and at least partially surrounds the small-diameter cylindrical portion, the small-diameter cylindrical portion is pulled out from the large-diameter cylindrical portion and the small-diameter is interposed through the curved wall portion. The cylindrical portion and the large-diameter cylindrical portion are continuous in the vertical direction and are deformable. And it has a configuration that the variable and the container "the product.

  However, in the “container having a variable internal volume” disclosed in Patent Document 1, if the volume is reduced from the state shown in FIG. 10A to the state shown in FIG. If this embossed portion is thin, it is considered that it is difficult to ensure rigidity in the use state shown in FIG. Of course, in the “container” of Patent Document 1, when the volume is to be reduced from the state shown in FIG. 10A to the state shown in FIG. Of course, since it is necessary to fold the curved wall portion into a very narrow space between the small diameter cylindrical portion and the large diameter cylindrical portion, it is considered that a very large force is required.

  On the other hand, as shown in FIGS. 11A and 11B, the “folding structure of the folding container” of Patent Document 2 is “bending the lower edge of the upper side surface portion 5 and the upper edge of the slope portion 4 upward. If the lower part of the slope part 4 and the upper edge of the lower side part 6 are connected by the lower bent part 8, the upper bent part 7 and the lower bent part 8 elastically expand and contract when folded. In order to absorb the deformation of the portion 5 and the lower side surface portion 6, the inversion angle θ and the length l can be increased, and as a result, the maximum folding height side wall portion 13 can be increased to increase the bulk change. It can be done.

  In the container of Patent Document 2, it is no longer necessary to “fold into the narrow gap”, which was necessary in the container of Patent Document 1, but the deformation at the “slope portion 4” is likely to occur. For example, when another container is “stacked” on the container of the cited document 2, there is a possibility that the container may be deformed, which may be inconvenient to use.

  In addition, when this type of container is molded with a synthetic resin sheet, the rigidity during use can be sufficiently secured by the aforementioned “ribs” and “complex shape”, but it is crushed for “volume reduction”. Even if it performs, it will almost return to the original state with the elastic force which synthetic resin sheet itself has. In other words, since a molded product of synthetic resin cannot be folded or crushed like “paper”, after use, it must be thrown away with almost no “volume reduction”. There is a problem of becoming full.

  Therefore, the present inventors have sufficient rigidity in the “use state” of the box-shaped or bowl-shaped resin molded product of this type when the article is stored or covered, or stacked, etc. As a result of various studies on how to make it possible to maintain the reduced volume state, the present invention has been completed.

  That is, the object of the present invention is to secure the necessary rigidity when storing / covering articles or stacking, etc., and to reduce volume by a simple operation. In addition, an object of the present invention is to provide a resin molded product that can maintain the state after volume reduction and can achieve “reduction of dust”.

In order to solve the above problems, first, the means taken by the invention according to claim 1 will be described with reference numerals used in the description of the best mode described below.
“A resin molded product 10 formed in a box shape or a bowl shape,
The resin molded product 10 is connected to an inner flat surface 11 serving as a central bottom surface or a central top plate, an outer flat surface 12 that is continuous with the inner flat surface 11 through an inner wall 12a and surrounds the outer surface of the inner flat surface 11, and the outer flat surface. A side wall 13 formed outside the flat surface 12 and a flange 14 formed at the opening end of the side wall 13 are provided.
A push-up column 15 whose tip is directed to the inner plane 11 is formed on the side wall 13, a second rib 17 is formed on the outer plane 12, and the tip 16 a is directed to the side wall 13 on the rising inner wall 12 a, Resin molded product 10 characterized in that first rib 16 positioned on the same straight line as two ribs 17 in plan view is formed.
It is.

  That is, as shown in FIGS. 1 and 2, the resin molded product 10 according to claim 1 is connected from the center of each figure via an inner plane 11 and a rising inner wall 12 a located on the outer periphery of the inner plane 11. An outer plane 12, a side wall 13 connected to the outside of the outer plane 12, and a flange 14 connected to the outer end edge of the side wall 13 are provided. When viewed in cross section, for example, as shown in FIG. As a whole, it is “box-shaped” or “pork-shaped”.

  Moreover, when this resin molded product 10 considers the packaging container which consists of a box-shaped or bowl-shaped container main body, and the cover body fitted to this container main body, these container main bodies or a lid body are also used. Can also be. That is, as shown in FIG. 2B or FIG. 6, the resin molded product 10 is a so-called “container” for storing articles when the outer flat surface 12 is a “bottom surface”. When the outer plane 12 is a “top plate”, it is a “lid” for a container that stores articles. In other words, the resin molded product 10 can be a packaging body, a container body, a lid, or both.

  Furthermore, in this resin molded product 10, when it is assumed that the outer flat surface 12 is a bottom surface as shown in FIG. The raised inner wall 12a is raised, and the inner flat surface 11 is slightly lifted by the raised inner wall 12a. Of course, when the said resin molded product 10 is assumed as a "lid", it cannot be overemphasized that the inner side plane 11 will be in the state dented a little.

  In the resin molded product 10 of the embodiment described later, a rising inner wall 11a that is inclined opposite to the rising inner wall 12a is formed further inside the rising inner wall 12a. The inner plane 11 is continuous. Accordingly, assuming that the resin molded product 10 is a “container main body”, the inner flat surface 11 is slightly lifted from the outer flat surface 12 by the rising inner wall 11a. Needless to say, it can be omitted.

  And this resin molded product 10 forms the some raising pillar 15 in the side wall part 13, as shown in FIG.1 and FIG.2. Each push-up column 15 swells inside the side wall portion 13 and has a shape like a “rib”, and as a result, plays a role of increasing the rigidity of the side wall portion 13. Of course, the flange portion 14 connected to the outer periphery of the side wall portion 13 naturally secures the rigidity of the side wall portion 13 and is also a “fitting portion” to another resin molded product 10. It is what.

  Further, as shown in FIGS. 1 and 2, the resin molded product 10 has the first rib 16 on the rising inner wall 12 a and the second rib 17 on the outer plane 12 positioned on the same straight line in plan view. A plurality of pairs of the first rib 16 and the second rib 17 are formed (in the embodiment described later, a total of 6 pairs). As shown in FIG. The resin molded product 10 is arranged radially from the center. As shown in FIG. 2, the first rib 16 and the second rib 17 are recessed or swollen with respect to the surface formed by the rising inner wall 12a and the outer flat surface 12, and are themselves standing. The function of increasing the rigidity of the surface formed by the raised inner wall 12a and the outer flat surface 12 is exhibited.

  The resin molded product 10 configured as described above has rigidity as described above by the respective portions of the rising inner wall 12a, the flange portion 14, the pushing column 15, the first rib 16, and the second rib 17. Therefore, even if the resin molded product 10 is a container, the contents can be securely stored. Of course, even if the resin molded product 10 is used as a lid for covering the inside of the container (whether the resin molded product 10 is used or another is used), the resin molded product 10 has a rigidity capable of firmly covering the contents. Therefore, even if another container is stacked on the resin molded product 10 as the lid, the resin molded product 10 is not crushed.

  Now, when it is going to throw away using the said resin molded product 10, you have to reduce volume, but the operation puts a hand on the flange part 14, for example, applies force (crushes), Or it can carry out easily by putting a hand on the outer side plane 12 of the resin molded product 10 which made the flange part 14 contact | abut on the desk surface, and applying force. In the following description, the case where a force is applied by placing a hand on the flange portion 14 will be mainly described. However, the hand is placed on the outer flat surface 12 of the resin molded product 10 in which the flange portion 14 is brought into contact with the desk surface. When applying force, it is basically the same effect.

  That is, when putting a hand on the flange portion 14 and applying a force so as to crush the entire resin molded product 10, the force from the flange portion 14 is, for example, as shown on the left side of the arrow in FIG. The side wall 13 is added to the push-up column 15 via the side wall 13. At this time, since the side wall 13 has a shape narrowed toward the outer plane 12, the lower part of the push-up column 15 on the side wall 13 is particularly narrow. I will try. If it does so, the outer side plane 12 itself connected to the lower end of the side wall part 13 will also be shrunk in the circumferential direction, and the second rib 17 on the outer side plane 12 will also be shrunk.

  As described above, the push-up pillars 15 on the side wall 13 and the second ribs 17 on the outer plane 12 try to shrink, so that the outer plane 12 also tends to shrink in the circumferential direction. The lower end (when the resin molded product 10 is used as a container) of the rising inner wall 12a connected to the outer periphery of the rising inner wall 12a also tries to shrink. As a result, the lower end of each push-up column 15 tries to push the entire rising inner wall 12a down to the lower side of the inner plane 11, and the second ribs 17 are folded along with this to increase the rigidity, and the tip 17a is increased. Since the first rib 16 on the rising inner wall 12a is to be folded, the rising inner wall 12a and the entire inner flat surface 11 connected thereto are lifted.

  When further force is applied, each push-up column 15 (also referred to as the side wall portion 13) and the second rib 17 contract the outer plane 12 as shown on the right side of the arrow in FIG. Work to move to the center. Each of the first ribs 16 is contracted in a direction orthogonal to the length direction thereof together with the respective second ribs 17 that are opposed to the first ribs 16 (becomes a state of being folded). The inner wall 12a is shrunk, and with the shrunk second rib 17, as shown on the right side of the arrow in FIG. The rising inner wall 12a is pushed toward the lower side.

  Thereafter, when the flange portion 14 is further pushed, the tip of each push-up column 15 enters below the rising inner wall 12a, and each second rib 17 is folded together with the first rib 16 formed on the rising inner wall 12a ( It will be crushed, and the "inversion prevention support | pillar" which prevents the outer side plane 12 and the starting inner wall 12a from returning to the original state will be formed.

  When the state shown on the right side of the arrow in FIG. 9A is reached, the ends of the push-up columns 15 and the second ribs 17 or the first ribs 16 are reversed after being extended to the maximum, and the outer plane 12 is completely Since each of the push-up pillars 15, the first ribs 16, and the second ribs 17 does not return to the original state or position again. That is, when the resin molded product 10 is crushed into a state as shown in FIG. 7B, the outer flat surface 12, the push-up column 15, and the rising inner wall 12a are deformed beyond the elastic deformation range. Therefore, the outer flat surface 12, the push-up column 15, and the rising inner wall 12 a do not return to the original state.

  If the lid is fitted to the flange portion 14 of the resin molded product 10 after the volume of the resin molded product 10 that is the container body is reduced, the resin molded product 10 is maintained in an airtight state. Even if the resin molded product 10 returns to its original state, the resin molded product 10 is not easily returned by holding the airtight state by the lid. In other words, if the lid is fitted to the reduced volume resin molded product 10, even if an impact or vibration is applied to the reduced volume resin molded product 10, the resin molded product 10 returns to its original state. There is almost nothing.

  Further, in the resin molded product 10, when the first rib 16 and the second rib 17 are concave or convex when viewed in a section along the longitudinal direction, as described above. When the volume is reduced, it is folded to assist the contraction of the outer flat surface 12 and the rising inner wall 12a, and when it is folded, it itself forms an “inversion prevention column”. When viewed in a cross section along the longitudinal direction, it is easy to be folded if it is concave or convex.

  Of course, when the first rib 16 and the second rib 17 are concave or convex as in the resin molded product 10 according to an example described later, the concave / convex direction is, for example, as shown in FIG. As shown in b), they may be the same, or they may be reversed as shown in FIG. 2C, for example, the first rib 16 and the second rib 17 Can be easily folded, and the volume reduction operation can be performed more reliably.

  Therefore, the resin molded product 10 according to claim 1 has the necessary rigidity at the time of use such as storage / covering of articles or stacking, and can be “volume reduction” by a simple operation. Moreover, after the volume has been reduced, this state can be maintained, and “trash reduction” can be achieved.

Moreover, in order to solve the said subject, the means which the invention which concerns on Claim 2 took about the resin molded product 10 of the said Claim 1,
“The first rib 16 and the second rib 17 have their tips 16a and 17a separated from each other.”
It is.

  In the resin molded product 10 according to this second aspect, the first rib 16 and the second rib 17 are formed such that the front ends 16a and 17a facing each other are separated from each other, for example, as shown in FIG. However, as a result, the contraction of the outer flat surface 12 on which the second rib 17 is formed and the contraction of the rising inner wall 12a on which the first rib 16 is formed are performed separately. It is compensated that the contraction of the outer flat surfaces 12 and the rising inner wall 12a described in the operation of the resin molded product 10 according to the above is surely performed through stages. The outer flat surface 12 between the first rib 16 and the second rib 17 rises in the same direction as the concave and convex direction of the first rib 16 when the volume of the resin molded product 10 is reduced. And the second rib 17 form an “inversion prevention column”.

  Accordingly, the resin molded product 10 according to the second aspect of the present invention exhibits the same function as that of the first or second aspect of the present invention, and is surely subjected to individual contraction of each outer plane 12 and the rising inner wall 12a through a stage. The volume reduction operation can be performed more reliably.

And in order to solve the said subject, the means which the invention which concerns on Claim 3 took is,
“A resin molded product 10 formed in a box shape or a bowl shape,
The resin molded product 10 includes an inner flat surface 11 serving as a central bottom surface or a central top plate, an outer flat surface 12 that rises on the inner flat surface 11 via an inner wall 12a and surrounds the outer surface of the inner flat surface 11, and A side wall 13 formed outside the flat surface 12 and a flange 14 formed at the opening end of the side wall 13 are provided.
A resin-molded article 10 characterized in that a push-up column 15 whose tip is directed toward the inner flat surface 11 is formed on the side wall 13, and a flange portion 19 having a bent portion 19a is formed on the outer flat surface 12.
It is.

  The resin molded product 10 according to claim 3 is basically the same as that of claim 1 except that the flange portion 19 having the bent portion 19 a is formed on the outer plane 12. This is different from that of item 1. Therefore, the same points as the resin molded product 10 of claim 1 of the resin molded product 10 according to claim 3 are claimed in FIGS. 3 and 4 showing the resin molded product 10 according to claim 3. The same code | symbol as each structural member demonstrated with the resin molded product 10 which concerns on claim | item 1 is attached | subjected, and the description is abbreviate | omitted.

  Now, in the resin molded product 10 shown in FIG. 3, the outer plane 12 does not have the second rib 17, but has a flange 19. Moreover, each collar part 19 is formed in the outer side plane 12 which opposes the lower end of each pushing-up pillar 15 mentioned above, for example, as shown in FIG.8 (b), it has the bending part 19a in the center. Therefore, as a result, as shown in FIGS. 4A to 4C, the push-up column 15 formed on the side wall portion 13 and the flange portion 19 with the bent portion 19 a facing the lower end of the push-up column 15 are provided. , It is located on a single straight line in plan view.

  The resin molded product 10 according to claim 3 configured as described above has rigidity as described above by the respective portions of the rising inner wall 12a, the flange portion 14, the push-up column 15, and the flange portion 19. Therefore, even if the resin molded product 10 is a container, the contents can be securely stored. Of course, even if the resin molded product 10 is used as a lid for covering the inside of the container (whether the resin molded product 10 is used or another is used), the resin molded product 10 has a rigidity capable of firmly covering the contents. Therefore, even if another container is stacked on the resin molded product 10 as the lid, the resin molded product 10 is not crushed. The above is the same as that described in the resin molded product 10 according to claim 1.

  Now, when the resin molded product 10 is to be discarded, the volume must be reduced. However, the operation will be described focusing on the case where a force is placed on the flange portion 14 to apply a force. The operation opposite to this, that is, when a force is applied by placing a hand on the outer flat surface 12 of the resin molded product 10 with the flange portion 14 in contact with the desk surface, basically has the same effect.

  When a force is put on the flange portion 14 and a force is applied so as to crush the entire resin molded product 10, the force from the flange portion 14 is applied to the push-up column 15 via the side wall portion 13. Since the portion 13 has a shape narrowed toward the outer flat surface 12, the lower portion of the push-up column 15 on the side wall portion 13 tends to be narrowed. If it does so, the outer side plane 12 itself connected to the lower end of the side wall part 13 will also try to shrink in the circumferential direction.

  In this way, the flanges 19 formed on the outer flat surface 12 by the pressing pillars 15 and the outer flat surfaces 12 on the side wall portions 13 being contracted are also shown on the left side of the arrow in FIG. 9B, for example. Like, try to shrink. In this case, since each collar part 19 is in a position close to the push-up column 15, the collar part 19 is smoothly contracted.

  When the flange portion 19 shrinks, the lower end of the rising inner wall 12a connected to the inner periphery of the outer flat surface 12 (when the resin molded product 10 is used as a container) also tries to shrink, and as a result, each pushing column 15 The lower end of the sword tries to push the entire rising inner wall 12a into the lower side of the inner flat surface 11, but the ribs 19 are folded and the rigidity is increased accordingly. The entire inner plane 11 is lifted.

  When further force is applied, each push-up column 15 (also referred to as the side wall portion 13) is moved so as to contract the outer plane 12 as shown on the right side of the arrow in FIG. Thus, the inner wall 12a is pushed up toward the lower side of the inner plane 11 while contracting and deforming the side wall portion 13 and lifting the inner plane 11.

  Thereafter, when the flange portion 14 is further pushed, the tip of each push-up column 15 sinks to the lower side of the rising inner wall 12a, and each flange portion 19 is folded (collapsed) together with the rising inner wall 12a. The “inversion prevention column” that prevents the rising inner wall 12a from returning to the original state is formed.

  When the state shown on the right side of the arrow in FIG. 9B is reached, the ends of the push-up pillars 15 and the flanges 19 are reversed after being extended to the maximum, and the outer plane 12 is completely deformed while being deformed. Since it is indented in the outer side plane 12, each pushing pillar 15 and the collar part 19 do not return to an original state or position again. That is, when the resin molded product 10 is crushed into a state as shown in FIG. 7B, the outer flat surface 12, the push-up column 15, and the rising inner wall 12a are deformed beyond the elastic deformation range. Therefore, the outer flat surface 12, the push-up column 15, and the rising inner wall 12 a do not return to the original state.

  Therefore, the resin molded product 10 according to claim 3 has the necessary rigidity at the time of use such as storage / covering of articles or stacking, and can be `` reduced '' by a simple operation, Moreover, after the volume has been reduced, this state can be maintained, and “trash reduction” can be achieved.

In order to solve the above-mentioned problem, the means taken by the invention according to claim 4 is the same as that of claim 3 above.
"The second rib 17 is formed on the outer plane 12"
It is.

  As shown in FIGS. 1 and 2, the resin molded product 10 according to claim 4 is formed by forming the second rib 17 on the outer plane 12, and the second rib 17 includes a plurality of (in an embodiment described later). 6) in total, and as shown in FIG. 1, the resin molded product 10 is arranged radially from the center. As shown in FIG. 2, the second rib 17 is recessed or bulged with respect to the surface formed by the rising inner wall 12 a and the outer flat surface 12. The function which raises the rigidity of the surface which 12 forms is exhibited.

  Since the resin molded product 10 configured as described above has rigidity as described above by the respective portions of the rising inner wall 12a, the flange portion 14, the push-up column 15, and the second rib 17, Even if the resin molded product 10 is a container, the contents can be securely stored. Of course, even if the resin molded product 10 is used as a lid for covering the inside of the container (whether the resin molded product 10 is used or another is used), the resin molded product 10 has a rigidity capable of firmly covering the contents. Therefore, even if another container is stacked on the resin molded product 10 as the lid, the resin molded product 10 is not crushed.

  Now, when it is going to throw away using the said resin molded product 10, you have to reduce volume, but the operation puts a hand on the flange part 14, for example, applies force (crushes), Or it can carry out easily by putting a hand on the outer side plane 12 of the resin molded product 10 which made the flange part 14 contact | abut on the desk surface, and applying force. That is, when putting a hand on the flange portion 14 and applying a force so as to crush the entire resin molded product 10, the force from the flange portion 14 is, for example, as shown on the left side of the arrow in FIG. The side wall 13 is added to the push-up column 15 via the side wall 13. At this time, since the side wall 13 has a shape narrowed toward the outer plane 12, the lower part of the push-up column 15 on the side wall 13 is particularly narrow. I will try. If it does so, the outer side plane 12 itself connected to the lower end of the side wall part 13 will also be shrunk in the circumferential direction, and the second rib 17 on the outer side plane 12 will also be shrunk.

As described above, the push-up pillars 15 on the side wall 13 and the second ribs 17 on the outer plane 12 try to shrink, so that the outer plane 12 also tends to shrink in the circumferential direction. The lower end (when the resin molded product 10 is used as a container) of the rising inner wall 12a connected to the outer periphery of the rising inner wall 12a also tries to shrink. As a result, the lower end of each push-up column 15 tries to push the entire rising inner wall 12a into the lower side of the inner plane 11, and accordingly the second ribs 17 are folded to increase the rigidity. Therefore, the raised inner wall 12a of the outer plane 12 and the entire inner plane 11 connected thereto are lifted.

  Thereafter, when the flange portion 14 is further pushed, the tip of each push-up column 15 enters under the rising inner wall 12a, and each second rib 17 is folded (collapsed) so that the outer flat surface 12 and the rising inner wall 12a are original. This will form “an anti-reversal post” that prevents it from returning to the state. That is, when the resin molded product 10 is crushed into a state as shown in FIG. 7B, the outer flat surface 12, the push-up column 15, and further the second rib 17 and the flange portion 19 are in the range of elastic deformation. Therefore, the outer flat surface 12, the push-up column 15, and the rising inner wall 12 a do not return to the original state.

  Therefore, the resin molded product 10 according to the fourth aspect exhibits the same function as that according to the third aspect, and further has a function of returning after volume reduction.

Further, in order to solve the above-mentioned problem, the means taken by the invention according to claim 5 is that of claim 3 or 4 above.
“The third rib 18 is formed on the rising inner wall 12a, the tip of which is directed to the side wall portion 13 and located on the same straight line as the bent portion 19a of the flange portion 19”.
It is.

  As described in the resin molded product 10 of the third aspect, the flange portion 19 and the third rib 18 are folded when the volume is reduced to help the outer plane 12 and the rising inner wall 12a contract. And when it is folded, it itself forms a “inversion prevention column”, so when viewed in a section along its longitudinal direction, it is folded when it is concave or convex It will be easy. At this time, since the collar portion 19 sandwiches the third rib 18, the third rib 18 is prevented from returning to the state before volume reduction.

  Of course, when the flange 19 and the third rib 18 are formed in a concave or convex state as in the resin molded product 10 of claim 5, the concave / convex direction is, for example, as shown in FIG. As shown in FIG. 4, they may be the same, or they may be reversed as shown in FIG.

  Therefore, the resin molded product 10 according to claim 5 can perform functions similar to those of claim 3 or 4, and can easily fold the flange portion 19 and the third rib 18. The volume reduction operation can be performed more reliably.

Furthermore, the means taken by the invention according to claim 6 is the resin molded product 10 according to any one of claims 3 to 5,
“Arrangement of the collar portion 19 toward the tip of the push-up column 15”
It is.

  When the volume of the resin molded product 10 is reduced, as described above, a hand is placed on the flange portion 14 and a force is applied so as to crush the entire resin molded product 10. Is applied to the push-up pillar 15 through the side wall 13. At this time, since the side wall portion 13 has a shape narrowed toward the outer flat surface 12, the lower portion of the push-up column 15 on the side wall portion 13 tends to be narrowed. If it does so, the outer side plane 12 itself connected to the lower end of the side wall part 13 will also try to shrink in the circumferential direction.

  In this case, if the flange portion 19 is arranged so as to face the tip of the push-up column 15, the bent portion 19 a of each flange portion 19 is in a direction coinciding with the center of the push-up column 15. The force when each push-up column 15 or the outer flat surface 12 is to be contracted is directly applied to the collar part 19, so that the collar part 19 itself is effectively contracted.

  Therefore, the resin molded product 10 according to claim 6 exhibits the same function as that according to any one of claims 3 to 5 described above, and the collar portion 19 itself is effectively contracted to reduce the volume. It is easier to do.

And in order to solve the said subject, the means which the invention which concerns on Claim 7 took is about the resin molded product 10 in any one of the said Claims 1-6,
“Resin molded product 10 is a sheet molded synthetic resin sheet”
It is.

  The resin molded product 10 according to the present invention may be an injection molded product or a blow molded product, but the resin molded product 10 according to claim 7 is a sheet molded product. In the resin molded product 10 according to the present invention, the side wall portion 13 is configured by the inclined surface portion 13a and the concave wall portion 13b, or the push column 15, the first rib 16, the second rib 17, the third rib 18, and the flange portion 19 are formed. Since it is made uneven, it has the most suitable shape for sheet molding, and even for molded products using thin synthetic resin sheets, the necessary rigidity can be secured during use, and volume reduction operation is also possible It will be easy to do.

  Therefore, the resin molded product 10 according to claim 7 can exhibit the same functions as the resin molded product 10 according to any one of claims 1 to 6, and can sufficiently exhibit the merit of sheet molding, and can be used. The rigidity at the time is sufficient, and the volume reduction operation is easier.

  In addition, the resin molded product 10 according to the present invention can implement the entire outer shape and the inner plane 11 not only in a circular shape but also in a polygonal shape, and each push-up column at the apex of such a polygonal inner plane 11. The inner end of 15 may be directed. “Polygonal shape” includes not only “regular polygons” such as “regular pentagons”, “squares”, “regular triangles”, but also simple “polygons”. In this case, the inner ends of the push-up columns 15 may be directed to all “vertices”, or the inner ends of the push-up columns 15 may be directed to a part of the “vertices”. Is also good.

  By making the inner end of each push-up column 15 face the “vertex” of the inner plane 11, the operation for “volume reduction” after use is more reliably performed. This is because the force from each push-up column 15 is easily concentrated on each “vertex” of the polygonal inner plane 11, and the force concentrated on each vertex is in the “side” direction forming the vertex. Since it is dispersed, the inner plane 11 itself is not deformed. Rather, the force from the push-up pillar 15 that has been directed toward each of the vertices pushes up the inner wall 12a that is located in the vicinity of the apex while deforming it, and efficiently lifts the corresponding apex portion of the inner plane 11. Because it becomes.

As described above, in the present invention,
“A resin molded product 10 formed in a box shape or a bowl shape,
The resin molded product 10 is connected to an inner flat surface 11 serving as a central bottom surface or a central top plate, an outer flat surface 12 that is continuous with the inner flat surface 11 through an inner wall 12a and surrounds the outer surface of the inner flat surface 11, and the outer flat surface. A side wall 13 formed outside the flat surface 12 and a flange 14 formed at the opening end of the side wall 13 are provided.
A push-up column 15 whose tip is directed to the inner plane 11 is formed on the side wall 13, a second rib 17 is formed on the outer plane 12, and the tip 16 a is directed to the side wall 13 on the rising inner wall 12 a, Forming the first rib 16 located on the same straight line as the two ribs 17 in plan view "
Or
“A resin molded product 10 formed in a box shape or a bowl shape,
The resin molded product 10 includes an inner flat surface 11 serving as a central bottom surface or a central top plate, an outer flat surface 12 that rises on the inner flat surface 11 via an inner wall 12a and surrounds the outer surface of the inner flat surface 11, and A side wall 13 formed outside the flat surface 12 and a flange 14 formed at the opening end of the side wall 13 are provided.
The side wall 13 is formed with a push-up column 15 whose tip is directed toward the inner plane 11, and the outer plane 12 is formed with a flange 19 having a bent portion 19a. "
The main feature of the structure is that it can secure the necessary rigidity when storing / covering articles, stacking, etc., and "reducing volume" with a simple operation. In addition, after the volume is reduced, the state can be maintained, and the resin molded product 10 capable of achieving “dust reduction” can be provided.

It is a claim corresponding drawing of Claim 1, and is a top view of the resin molded product 10 which made the inner side plane 11 circular. The principal part of the resin molded product 10 which concerns on Claim 1 is shown, (a) is the elements on larger scale which expand and show the 1st rib 16 and the 2nd rib 17, (b) is 1-1 of (a). The partial longitudinal cross-sectional view which looked at the line part, (c) is a partial longitudinal cross-sectional view which shows the modification of (b). It is a claim corresponding view of Claim 3, and is a top view of the resin molded product 10 which made the inner side plane 11 circular. The principal part of the resin molded product 10 which concerns on Claim 3 is shown, (a) is the elements on larger scale which expand and show the 3rd rib 18 and the collar part 19, (b) is 2-2 line of (a). (C) is the partial longitudinal cross-sectional view which shows the modification of (b). It is a top view of the resin molded product 10 which concerns on Example 1 of this invention. It is the longitudinal cross-sectional view of the resin molded product 10 seen along the 3-3 line in FIG. The resin molded product 10 is shown, (a) is a perspective view of the resin molded product 10 shown in FIG. 5, and (b) is a perspective view when the volume of the resin molded product 10 is reduced. It is. The other part of the resin molded product 10 is shown. (A) is a partial longitudinal sectional view when two resin molded products 10 are stacked, and (b) is taken along line 4-4 in FIG. (C) is a partially enlarged sectional view taken along line 5-5 in FIG. It is a fragmentary sectional view which shows the outline of the change of each part at the time of reducing the volume of the resin molded product 10 on the right and left of the arrow, and (a) is a sectional view at a portion where the first rib 16 and the second rib 17 are present. (B) is sectional drawing in the part in which the 3rd rib 18 and the collar part 19 exist. It is a perspective view which shows the mode of the container shown by patent document 1 before (a) volume reduction and after (b) volume reduction. It is a longitudinal cross-sectional view which shows the mode of the container shown by patent document 2 before (a) volume reduction and (b) after volume reduction.

  Next, the invention according to each claim configured as described above will be described for the resin molded product 10 according to the embodiment shown in FIGS.

  The resin molded article 10 according to this embodiment employs a sheet of Amorphis polyethylene terephthalate, polypropylene filler, polystyrene, polylactic acid, or polypropylene having a thickness of 0.2 mm to 0.8 mm, preferably 0.35 mm to 0.4 mm. And is formed into a sheet, and is a bowl-shaped packaging container having a maximum diameter of 50 mm to 300 mm, optimally circular in plan view of 120 mm to 150 mm, and a cross section as shown in FIG. . The container height of the resin molded product 10 was 10 mm to 90 mm, optimally 35 mm to 45 mm, and the width of the outer flat surface 12 was 2 mm to 15 mm, optimally 5 mm to 6 mm.

  The specific material, specific size, and specific sheet thickness of the above synthetic resin sheet are as follows: rising inner wall 12a, side wall portion 13 (particularly concave wall portion 13b), push-up column 15, first rib 16, second The rib 17, the third rib 18, and the flange portion 19 are optimal for being folded like an accordion during volume reduction. By adopting the synthetic resin sheet of such a material, it exerts the function of surely helping the tip of each push-up column 15 and the rising inner wall 12a connected to the bottom of the inner flat surface 11 to sink under the volume during volume reduction. It will be.

  Then, as shown in FIG. 5, the resin molded product 10 is formed from the center of the figure on the inner flat surface 11 having a circular shape in plan view, the rising inner wall 11a outside the inner flat surface 11, and the outer periphery of the rising inner wall 11a. It is provided with an outer flat surface 12 connected through a raised inner wall 12a, a side wall portion 13 connected through the outer flat surface 12, and a flange portion 14 connected to the outer edge of the side wall portion 13, as viewed in cross section. As shown in FIG. 6, the whole is bowl-shaped. In addition, this resin molded product 10 may be implemented so as to have a box shape as a whole.

  The inner flat surface 11 of the resin molded product 10 is located at the center so that it is slightly lifted from the outer flat surface 12 by the rising inner wall 12a and the rising inner wall 11a as shown in FIG. It is supported. The rising inner wall 11a employed in the embodiment is not necessarily required, and the inner flat surface 11 is formed directly on the upper end of the rising inner wall 12a, or the rising inner wall 11a is made larger than that shown in FIG. However, when the resin molded product 10 is employed as a “container”, it is preferable to employ the rising inner wall 11a in order to secure an internal volume. On the other hand, as shown in FIG. 5, the inner plane 11 has a substantially circular shape. Therefore, the outer plane 12 that continues around the inner plane 11 via the rising inner wall 11a and the rising inner wall 12a is shown in FIG. As shown in FIG. 5, a substantially circular frame is formed.

  As shown in FIG. 5, the outer plane 12 is located around the inner plane 11 via a rising inner wall 12 a, and the outer plane 12 includes a push-up column 15, a second rib 17, and A flange 19 is formed, or a first rib 16 to be described later is formed on the rising inner wall 12a. Further, when the resin molded product 10 is a “container”, the outer flat surface 12 of the concave wall portion 13b forms a bottom surface that directly contacts a desk or the like as shown in FIG. It will fall under “Itoshiri”. Therefore, the inner plane 11 becomes a “raised bottom”.

  Moreover, in the resin molded product 10 of this embodiment, as shown in FIG. 5, the side wall portion 13 described above is connected to the inclined surface portion 13a connected to the inner edge of the flange portion 14 and the above-described 12b from the inner end edge of the inclined surface portion 13a. It is comprised by the concave wall part 13b which continues to. In particular, in the resin molded product 10 of the present embodiment, the concave wall portion 13b constituting the side wall portion 13 is a curved surface that curves to the outside of the resin molded product 10 and is reduced in volume from the flange portion 14. When receiving the pressing force, the concave wall portion 13b can be easily “squeezed”. In addition, about this concave wall part 13b, you may carry out what was given the "roundness" as shown in FIG.

  In the resin molded product 10 of the present embodiment, the inclined surface portion 13a constituting the side wall portion 13 and continuing to the inner edge of the flange portion 14 withstands the force received from the flange portion 14, and pushes up this force. 15 and the first rib 16 are transmitted directly. Further, the boundary between the inclined surface portion 13a and the flange portion 14 becomes a “node” at the time of “inversion” described above.

  And this inclined surface part 13a is not limited to the shape as shown in figure, For example, it may consist only of the upper end of the push-up pillar 15. FIG. The shape of the inclined surface portion 13a is not limited to the illustrated one, but if the inclined surface portion 13a is a triangle, the lower end of the push-up column 15 can be easily folded when the resin molded product 10 is crushed. It becomes easy to deform.

  On the other hand, in the resin molded product 10 of the present embodiment, the shape of the concave wall portion 13b constituting the side wall portion 13 is not limited to that of the embodiment as long as the push-up pillar 15 can be formed, and is any shape. It may be a rectangular parallelepiped, a hemispherical shape, or a diamond shape. When the concave wall portion 13b is a curved surface that curves outward, each concave wall portion 13b is easily squeezed by the force when the flange portion 14 is pressed, and the push-up pillar 15 or the first rib 16 described later is It will be easily compressed from both sides. In particular, when each of the concave wall portions 13b has a plurality like petals, when the resin molded product 10 is crushed, the lower end of each lifting column 15 can be easily folded and the volume of the resin molded product 10 can be further reduced. It becomes easy.

  The resin molded product 10 of the present embodiment is a so-called “packaging container”, “container main body”, or “tray” for storing articles, but if the outer flat surface 12 is a “top plate”. It becomes a “lid” for the “packaging container” or the “container main body” containing the articles. In other words, the resin molded product 10 of the present embodiment can be used as a container body, a lid body, or both, and a tray constituting a packaging container.

  And in the resin molded product 10 of this embodiment, as shown in FIG.5 and FIG.6, the raising pillar 15 was formed between each concave wall part 13b which comprises the side wall part 13. As shown in FIG. As a result, each push-up column 15 swells in the opposite direction to the concave direction of each concave wall portion 13b and has a shape like a “rib”, and increases the rigidity between the concave wall portions 13b. To fulfill.

  Of course, a flange 14 connected to the upper end of the side wall 13 is formed on the outer periphery of the side wall 13, that is, the upper end opening edge. This flange 14 ensures the rigidity of the side wall 13. As a matter of course, it is also a “fitting part” to another resin molded product 10. In addition, the height position of the flange part 14 in this embodiment is 5 mm-81 mm from the outer side plane 12, and optimally is 26 mm-36 mm.

  As shown in FIG. 6 and FIG. 8A, the flange portion 14 formed at the upper end opening edge of the resin molded product 10 of the present embodiment has a general “U” shape in the longitudinal section. However, the vertical cross-sectional shape may be a “snow dharma” shape, that is, it may have a constricted portion having a narrower width than the top of the head at the center. It is possible to prevent the flange portions 14 and other portions from being blocked (being fitted with each other and difficult to remove).

  Note that a knob may be formed on a part of the flange portion 14 of the resin molded product 10. These knobs are each held by fingers when the lid fitted to the flange portion 14 is removed from the resin molded product 10 so that the resin molded product 10 and the lid can be easily unfitted. It is.

  As described above, as shown in FIG. 5, the rising inner wall 12 a that floats the inner plane 11 from the outer plane 12 includes the first rib 16 that faces the center of each concave wall portion 13 b, and A third rib 18 is formed toward the tip (lower end) of each push-up column 15. Further, on the outer flat surface 12 located between each first rib 16 and the central portion of the concave wall portion 13b, a second rib 17 is formed with the tip 17a directed to the tip 16a of the first rib 16. On the outer flat surface 12 positioned between the third rib 18 and the push-up pillar 15, a flange portion 19 having a wider push-up pillar 15 side is formed.

  The first rib 16, the second rib 17, the third rib 18, and the flange portion 19 are formed by denting the resin sheet constituting the resin molded product 10 inside the resin molded product 10 or by resin. It is formed by inflating to the outside of the molded article 10, and it is appropriately selected whether to indent or inflate. For example, when viewing the first rib 16, as shown in FIG. 2 (b), it may be inflated outside the resin molded product 10, or as shown in FIG. 2 (c), the resin molded product. 10 may be recessed inside. Similarly, when viewed from the flange portion 19, as shown in FIG. 4C, it may be inflated to the outside of the resin molded product 10, or as shown in FIG. 4B, the resin molded product. 10 may be recessed inside.

  In particular, when the bent portion 19a is formed so as to protrude toward the inside of the molded product 10 from the outer flat surface 12, the outer flat surface 12 contacts the upper surface of a desk or the like, so that the molded product 10 can be placed stably. In addition, when the volume is reduced, the entire outer flat surface 12 receives a force from a desk or the like, so that a stable volume reduction operation can be performed.

  The first rib 16, the second rib 17, the third rib 18, and the flange portion 19 are a “pair” of the first rib 16 and the second rib 17, and the third rib 18 and the flange portion 19. Is used as a “pair” with the push-up pillar 15, and in each “pair”, the center of each part is formed on the same straight line in plan view. The reason is that, when the volume of the resin molded product 10 is reduced, each part must be contracted. Therefore, the contraction of each part when the volume of the resin molded product 10 is reduced is the first rib 16, the second rib 17, This is because the contraction of each “pair” constituted by the third rib 18, the flange portion 19, and the push-up column 15 starts as “an opportunity”.

  Further, the first rib 16, the second rib 17, the third rib 18, and the flange portion 19 are arranged so as to be aligned on the radiation from the center of the resin molded product 10, as shown in FIG. And the angles of these radiations are set to be substantially the same. The reason is that when reducing the volume of the resin molded product 10, as described above, a force is applied to the entire flange portion 14, and the force is applied to each of the first rib 16 and the second rib 17. This is because the third rib 18 and the flange portion 19 are equally affected.

  In the “pair” of the first rib 16 and the second rib 17, as shown in FIG. 2A, the tip 16 a and the tip 17 a face each other and are slightly separated from each other. is there. This is because the first rib 16 independently assists the contraction of the rising inner wall 12a, and the second rib 17 independently assists the contraction of the outer flat surface 12. The first rib 16 and the second rib 17 are located on the same straight line in plan view. This is because the first rib 16 and the second rib 17 and the start-up in which they are formed. This is because the inner wall 12a and the outer plane 12 can be simultaneously contracted at very close positions.

  When the first rib 16 and the second rib 17 that are also concave portions or bulges are contracted, both side portions thereof are combined with each other to form one small column, and these columns are formed by the side wall portion 13. By pushing each other, the pushing of the outer plane 12 to the lower side of the inner plane 11 is made effective. In particular, when the concave and convex directions of the first rib 16 and the second rib 17 are the same, the “inversion prevention support column” formed by the first rib 16 and the second rib 17 has higher strength. The shape after the resin molded product 10 is reduced is firmly maintained.

  On the other hand, as shown in FIG. 4A, the pair of the push-up pillar 15, the third rib 18, and the flange part 19 also has the third rib 18 and the flange part 19, and the flange part 19 and the push-up pillar 15. Are arranged on the same straight line in plan view. In particular, as shown in FIG. 8 (b), the flange portion 19 has a symmetrical shape with the bent portion 19a positioned on the straight line as a symmetric line, and the outer sides positioned on the left and right sides thereof. The contraction of the flat surface 12 can be effectively performed, and the lower end of the push-up column 15 is positioned on the extension of the bent portion 19a, so that the volume reduction operation of the resin molded product 10 can be stably performed. It can be done.

  When the third ribs 18 and the fan-shaped flanges 19 that are also recesses or bulges are contracted, both side portions are combined with each other to form one small column. By being pushed together by 15, the outer plane 12 is effectively pushed downward into the inner plane 11.

  Moreover, since the resin molded product 10 of this embodiment comprised each part as mentioned above, it has the rigidity which can accommodate the contents firmly, and this resin molded product 10 Even if the lid is fitted and another resin molded product 10 is stacked thereon, the resin molded product 10 is not crushed.

DESCRIPTION OF SYMBOLS 10 Resin molded product 10a Center bottom face or center top plate 11 Inner plane 11a Rising inner wall 12 Outer plane 12a Rising inner wall 13 Side wall part 13a Inclined surface part 13b Concave wall part 14 Flange part 15 Push-up pillar 16 First rib 16a Tip 17 Second Rib 17a tip 18 third rib 19 collar 19a bent part

Claims (7)

A resin molded product formed in a box shape or a bowl shape,
The resin molded product was formed on the inner flat surface serving as the central bottom surface or the central top plate, the outer flat surface extending through the inner flat surface surrounding the inner flat surface, and the outer flat surface surrounding the outer flat surface. With a side wall and a flange formed at the opening end of the side wall,
A push-up column whose tip is directed to the inner plane is formed on the side wall portion, a second rib is formed on the outer plane, and the tip is directed to the side wall portion on the rising inner wall and is identical to the second rib in plan view. A resin molded product in which a first rib located on a line is formed.   The resin molded product according to claim 1, wherein the first rib and the second rib are separated from each other at opposite ends. A resin molded product formed in a box shape or a bowl shape,
The resin molded product was formed on the inner flat surface serving as the central bottom surface or the central top plate, the outer flat surface continuously rising through the inner flat surface through the inner wall, and outside the outer flat surface. With a side wall and a flange formed at the opening end of the side wall,
A resin molded product, wherein a push-up column whose tip is directed toward the inner plane is formed on the side wall, and a collar portion having a bent portion is formed on the outer plane.   The resin molded product according to claim 3, wherein a second rib is formed on the outer plane.   5. The third rib according to claim 3, wherein a third rib is formed on the rising inner wall, the tip of which is directed to the side wall portion and positioned on the same straight line as the plane of bending of the flange portion. Resin molded products.   The resin molded product according to any one of claims 3 to 5, wherein the flange portion is disposed so as to face a tip of the push-up column.   The resin molded product according to any one of claims 1 to 6, wherein the resin molded product is a sheet formed from a synthetic resin sheet.

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