JP2011219108A - Wall structure of carrying container, method of manufacturing carrying apparatus, and mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the wall structure of a carrying container capable of increasing support strength of a hole blocking member than the conventional one, a mold capable of increasing the degree of freedom of shapes of the support wall supporting the hole blocking member than the conventional one, and a method of manufacturing carrying apparatus using the mold.SOLUTION: A first cavity 38 for molding a lid frame wall 13 including the support wall 20 is formed in the mold 30 before a second cavity 39 for molding the hole blocking member 25 is formed in the mold 30, thereby eliminating the restriction such that the front surface and the rear surface of an opening edge of the lid frame wall 13 is inevitably formed into the same form like the conventional mold, resulting in the increase of the degree of freedom of shapes of the support wall 20.

Description

  The present invention relates to a transport container in which a container constituting wall on the side surface, lower surface or upper surface of a transport container and a hole closing member which closes a wall through hole of the container constituting wall are molded in two colors with different resins. The present invention relates to a wall structure, a molding die for performing such two-color molding, and a method for manufacturing a transport device for manufacturing such a transport container or a cover for the transport container.

  Conventionally, as shown in FIG. 14A as an example of this type of molding die, the cavity 4 formed between the first and second molding dies 1 and 2 is mainly formed by the cylindrical core 3. The cavity 4A and the subcavity 4B are partitioned, and the hole closing member 8 is formed in the subcavity 4B, and then the cylindrical core 3 is core-backed (see FIG. 14B). It was the structure which molds. Thereby, the lid body of the transport container having a wall structure in which the side surface of the hole closing member 8 is fixed to the inner surface 7A of the wall through-hole 7 provided in the container constituting wall 6 is formed (for example, see Patent Document 1). ).

Japanese Patent No. 4203684 (paragraphs [0042] to [0044], FIGS. 1 and 2)

  However, in the above-described conventional wall structure of the lid of the transport container, the side surface of the hole closing member 8 is fixed to the hole inner side surface 7A of the wall through-hole 7, and the container constituting wall 6 is within the thickness range of the hole closing member 8. Supports the hole closing member 8, but depending on the thickness, material, etc. of the hole closing member 8, there may occur a situation where the support strength is insufficient. On the other hand, even if the above-described conventional molding die is used, a support wall that is fixed to one of the inner and outer surfaces (one surface in the thickness direction) of the hole closing member 8 is integrally formed with the container constituting wall 6. The problem is that it is difficult to increase the strength of the support wall and the degree of freedom of the shape of the support wall is low.

  Specifically, as shown in FIG. 15B, for example, in order to make a structure in which the support wall 5 integrally formed on the container constituting wall 6 projects from the inner surface 7A of the hole to the inside of the wall through hole 7, In this molding die, as shown in FIG. 15A, the stepped depression 3A may be provided in the cylindrical core 3. However, in the above-described conventional molding die, when the stepped shape is formed in the fixing portion of the container constituent wall 6 with the hole closing member 8 by the cylindrical core 3 before the core back, on the back side of the fixing portion. The step shape is always formed by the cylindrical core 3 after the core back. For this reason, the corners of the stepped shape of the front and back are abutted on the container constituting wall 6 to generate a thin wall portion 6N, resulting in insufficient strength, or the support wall 5 is thickened to eliminate this, Problems such as interference with other luggage could occur.

  Moreover, in the conventional molding die, since the front and back of the opening edge part of the wall through-hole 7 in the container constituting wall 6 are both molded by the tip end surface of the same cylindrical core 3, the shape of the front and back must be the same. Due to the restrictions, it was impossible to mold a support wall (for example, reference numeral 20 in FIG. 4B) that makes the front and back shapes different. In addition, since the support wall 5 is formed in the retreat space after the core back of the cylindrical core 3 (see reference numeral 4C in FIG. 15B), for example, a rib-shaped support wall that is wider than the hole closing member 8 side. As shown in FIG. 7 (see reference numeral 22 in FIG. 7), it was not possible to form a support wall having a cross-sectional area that decreases as the distance from the hole closing member increases. Further, the support wall (see reference numeral 22 in FIG. 7) that extends the hole closing member so as to cross the inner surface or the outer surface and supports the hole closing member is also the cylindrical core 3 and the core in the conventional molding die described above. The shape of the first mold 1 that supports the bag so as to be backable is too complicated, and it is difficult to mold such a support wall.

  The present invention has been made in view of the above circumstances, and has a wall structure of a transport container capable of making the support strength of the hole closing member higher than before and a degree of freedom of the shape of the support wall supporting the hole closing member. It is an object of the present invention to provide a molding die that can be made higher than before and a method for manufacturing a transport device using the molding die.

  In order to achieve the above object, the wall structure of the transport container according to the invention of claim 1 is such that the inner wall surface of the wall through-hole of the container constituting wall on either the side surface, the lower surface or the upper surface of the transport container is closed. In the wall structure of the transport container in which the container constituting wall and the hole closing member are formed in two colors in a state where the member is fixed and the wall through hole is closed, the container forming wall is formed as a part of the container constituting wall, It has a feature in that it has a support wall that extends from the inner surface of the hole along the inner or outer surface to the inside of the wall through hole or extends across the wall through hole and is fixed to the hole closing member.

  The invention according to claim 2 is the wall structure of the transport container according to claim 1, in which the opening edge protrusion protrudes from the opening edge of the wall through hole on either the inner or outer surface of the container constituting wall. The end of the support wall is formed integrally with the opening edge protrusion, and the hole closing member is formed with a retaining protrusion that bites into the end on the support wall side of the inner surface of the hole. It has the characteristics.

  According to a third aspect of the present invention, there is provided a molding die comprising: a container constituent wall and a hole closing member in a state in which a wall through-hole included in any one of the side, lower and upper surfaces of the transport container is closed by a hole closing member. A mold for two-color molding, the first mold having a first molding surface for molding one side of the container constituting wall and the inside and outside of the hole closing member, and the other inside and outside of the container constituting wall It has a second molding surface for molding the surface, and is arranged at a mold closing position where it is linearly moved relative to the first molding die and joined to the first molding die, and at a mold opening position apart from the first molding die. And a second molding die having a core receiving hole opened in the second molding surface and a third molding surface for molding the inner and outer surfaces of the hole closing member at the tip. Between the initial position where the third molding surface is joined to the first molding surface and the core back position separated from the first molding surface. A slide core that moves linearly, and when the second mold is moved from the mold opening position to the mold closing position, the slide core is disposed at the initial position, and the first cavity is formed by a mold to mold the container constituent wall. A second cavity for forming the hole closing member is formed in the mold after the slide core is moved to the core back position after the container constituting wall is formed by the first cavity. The first cavity is formed in a state of communicating between the first molding surface and the second molding surface and between the first molding surface and the third molding surface, and the first molding surface of the first cavities. The support wall of the container forming wall formed by the support wall forming portion disposed between the first forming surface and the third forming surface is fixed to the hole closing member formed by the second cavity.

  According to a fourth aspect of the present invention, in the molding die according to the third aspect, the side surface of the tip of the slide core disposed at the initial position is a part of the inner surface of the first cavity, and the inner side surface of the wall through hole is formed. It is characterized by being configured to be molded.

  According to a fifth aspect of the present invention, in the molding die according to the fourth aspect, between the first molding surface and the second molding surface of the first cavity, the container constituting wall protrudes from the opening edge of the wall through hole. An opening edge protrusion molding portion for forming an opening edge protrusion integrated with the end portion of the support wall is provided, and the hole is formed by the pressure of the resin for forming the hole closing member injected into the second cavity. It is characterized in that a retaining projection that bites into an end portion of the inner wall on the support wall side can be integrally formed with the hole closing member.

  According to a sixth aspect of the present invention, there is provided the molding die according to any one of the third to fifth aspects, wherein the support wall molding groove formed on the first molding surface and extending across the core receiving hole is the third. It is characterized in that the support wall molding portion is configured by closing the molding surface.

  According to a seventh aspect of the present invention, in the molding die according to the sixth aspect, in the support wall molding groove, the opening end on the third molding surface side is wider than the back part away from the third molding surface. However, it has characteristics.

  The manufacturing method of the transport device according to the invention of claim 8 is characterized in that the transport container or the lid for the transport container is manufactured using the molding die according to any one of claims 3 to 7. Have

[Invention of Claim 1]
According to the wall structure of the transport container of claim 1, the hole blocking member is fixed to the inner surface of the hole of the wall through hole in the container constituent wall, and the support wall formed as a part of the container constituent wall is the hole. Since the hole closing member is supported by adhering to either the inner or outer surface of the closing member, the support strength of the hole closing member is higher than that of the conventional one.

[Invention of claim 2]
In the wall structure of the transport container according to claim 2, since the end portion of the support wall is integrally provided on the opening edge protrusion protruding from the opening edge of the wall through hole in the container constituting wall, The end of the wall side is located in the middle of the opening edge of the wall through-hole in the thickness direction. In the process of molding the container constituent wall from the molten resin, the end of the inner surface of the hole opposite to the support wall. The end of the support wall is solidified later than the end. As a result, when two-color molding is performed in the order of the container constituent wall and the hole closing member, the retaining protrusion that bites into the end on the support wall side on the inner surface of the hole is perforated by the pressure of the molten resin for forming the hole closing member. It can be formed into a closing member. And the coupling | bonding force of a container structural wall and a hole obstruction | occlusion member can be heightened by this retaining protrusion.

[Invention of claim 3]
The molding die according to claim 3 is configured such that when the second molding die is relatively moved from the mold opening position to the mold closing position with respect to the first molding die, the slide core is disposed at the initial position, and the first cavity is formed in the molding die. Is formed. At this time, the first cavity is not only between the first molding surface of the first molding die and the second molding surface of the second molding die, but also the first molding surface of the first molding die and the third molding of the slide core. The support wall is formed integrally with the container constituting wall at the support wall molding portion between the first molding surface and the third molding surface of the first cavity. And after shape | molding a container structure wall in a 1st cavity, a slide core moves to a core back position. Thus, the second cavity for forming the hole closing member is formed as a withdrawal space after the core back of the slide core, and the support wall formed by the support wall forming portion is exposed in the second cavity. It is fixed to a hole closing member formed by two cavities. Thus, in the present invention, before the second cavity for molding the hole closing member is formed in the molding die, the first cavity for molding the container constituting wall including the support wall is the molding die. Since it is formed inside, there is no restriction that the front and back of the opening edge portion of the wall through-hole in the container constituting wall always have the same shape as in the conventional molding die, and the degree of freedom of the shape of the support wall is increased. . Therefore, according to the molding die of the present invention, the shape of the support wall having a shape that cannot be molded by the conventional molding die, that is, the shape of the opening edge of the wall through hole in the container constituting wall is made different between the front and the back. It is also possible to form a support wall having such a shape, or a support wall having such a shape that the cross-sectional area decreases as the distance from the hole closing member increases.

[Invention of claim 4]
According to the molding die of the fourth aspect, the side surface of the distal end portion of the slide core arranged at the initial position becomes a part of the inner surface of the first cavity, and the inner side surface of the wall through hole is molded. When the slide core moves to the core back position and the second cavity is formed, the inner surface of the hole of the wall through hole is exposed in the second cavity, and the hole closing member formed in the second cavity is the wall. It adheres to the inner surface of the through hole. As a result, the support wall of the container constituent wall is fixed to either the inner or outer surface of the hole closing member, and the hole closing member is also fixed to the inner surface of the wall through-hole of the container constituent wall. Thus, the support strength of the hole closing member can be made higher than before.

[Invention of claim 5]
In the container constituting wall formed by the molding die according to the fifth aspect, the end portion of the support wall is integrally provided on the opening edge protrusion protruding from the opening edge of the wall through hole. As a result, the end on the support wall side of the inner surface of the hole is positioned in the middle in the thickness direction of the opening edge of the wall through hole. In the process of forming the container constituent wall from the molten resin, The end of the support wall is solidified later than the end of the side opposite to the support wall. Thus, after the container constituting wall is molded, the retaining projection that bites into the end portion on the support wall side on the inner surface of the hole is molded into the hole closing member by the pressure of the resin for molding the hole closing member injected into the second cavity. be able to. And the coupling | bonding force of a container structural wall and a hole obstruction | occlusion member can be heightened by this retaining protrusion.

[Invention of claim 6]
In the molding die according to claim 6, the support wall molding portion is formed by closing the support wall molding groove formed on the first molding surface and extending across the core receiving hole with the third molding surface. A support wall extending across the hole closing member in the mold structure can be formed.

[Invention of Claim 7]
In the molding die according to claim 7, the support wall molding groove has a wider opening end on the side closed by the third molding surface than the back part away from the third molding surface. It is possible to mold a rib-shaped support wall whose width is narrower on the side farther from the side closer to the hole closing member that could not be molded with the molding die.

[Invention of Claim 8]
The manufacturing method for a transport device according to claim 8 manufactures a transport device (a transport container or a cover body for a transport container) having a wall structure that is difficult or impossible to mold when a conventional molding die is used. It becomes possible to do.

(A) The perspective view of the outer surface side of the cover which concerns on 1st Embodiment of this invention, (B) The perspective view of the inner surface side Sectional drawing of the cover body in the AA cut surface of FIG. 1 (A) Cross section of mold (A) Cross section before core back of molding die, (B) Cross section after core back Partially enlarged cross-sectional view after core back of molding die, (A) The perspective view of the outer surface side of the cover which concerns on 2nd Embodiment of this invention, (B) The perspective view of the inner surface side Sectional drawing of the cover body in the BB cut surface of FIG. 6 (A) (A) Cross section before core back of molding die, (B) Cross section after core back (A) Sectional view before core back of molding die according to third embodiment of the present invention, (B) Sectional view after core back (A) Sectional view before core back of molding die according to fourth embodiment of the present invention, (B) Sectional view after core back Cross-sectional view of a molding die and a lid showing a modification of the retaining projection Sectional view of a molding die and a lid showing a retaining protrusion not belonging to the present invention Sectional view of a molding die and a lid showing a retaining protrusion not belonging to the present invention (A) Sectional view before core back of conventional molding die, (B) Sectional view after core back (A) Cross-sectional view before core back of molding die for explaining conventional problems, (B) Cross-sectional view after core back

[First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The upper surface of the transport container 10 shown in FIG. 1A is a lid 11, and the lid 11 includes a rectangular lid frame wall 13 and a frame hole 14 of the lid frame wall 13 (“ It is a two-color molded product with a hole closing member 25 that closes a wall through hole ”. In the present embodiment, the lid frame wall 13 corresponds to the “container wall on the upper surface of the transport container” according to the present invention. Then, the “wall structure of the transport container” according to the present invention is applied to the lid body 11, and the “method for manufacturing a transport device” according to the present invention is used for manufacturing the lid body 11.

  The hole closing member 25 described above has a substantially rectangular flat plate shape made of a transparent resin (for example, random PP). On the other hand, the lid frame wall 13 is made of, for example, an opaque resin (for example, a block PP), has a rectangular shape as a whole, and has a rectangular frame hole 14 similar to the overall outer edge shape. An outer edge reinforcing portion 15 is formed on the entire outer edge portion of the lid frame wall 13. The outer edge reinforcing portion 15 bulges to the upper surface side as shown in FIG. 1 (A), while the lower surface side is recessed in a groove shape as shown in FIG. 1 (B), and there are plural longitudinal positions in the groove. An in-groove reinforcing wall 15A is formed that communicates between the groove inner surfaces in the groove width direction.

  As shown in FIG. 2, the ceiling plate portion 16 provided on the inner side of the outer edge reinforcing portion 15 in the lid frame wall 13 has an annular inclined portion 16 </ b> A at a portion away from the outer edge reinforcing portion 15, and the annular inclination thereof. Both the inner portion and the outer portion from the portion 16A are in the form of a horizontal plate. And the above-mentioned frame hole 14 is penetratingly formed in the center flat plate part 16B inside 16 A of cyclic | annular inclination parts among the ceiling board parts 16. As shown in FIG.

  As shown in FIG. 1B, an annular rib 17 (corresponding to the “opening edge protrusion” of the present invention) protrudes downward from the opening edge of the frame hole 14 in the lower surface of the ceiling plate portion 16. The frame hole 14 is enclosed. Moreover, the outer edge annular rib 18 protrudes downward from the edge of the lower surface of the ceiling plate part 16 on the outer edge reinforcing part 15 side. The outer edge annular rib 18 surrounds the annular rib 17 and projects downward from the annular rib 17. As shown in FIG. 1B, two reinforcing ribs 19 are provided for each side of the frame hole 14 between the outer edge annular rib 18 and the annular rib 17 in the lower surface of the ceiling plate portion 16. It protrudes and is interposed between the outer edge annular rib 18 and the annular rib 17.

  As shown in FIG. 2, the support wall 20 according to the present invention projects horizontally from the inner surface 17 </ b> A of the annular rib 17. The support wall 20 is disposed at the upper end portion of the inner surface 17A of the annular rib 17 and is fixed to the outer edge portion of the lower surface of the hole closing member 25 in the frame hole 14. The side surface of the hole closing member 25 is fixed to the hole inner side surface 14 </ b> A of the frame hole 14. Furthermore, the upper surface of the hole closing member 25 and the upper surface of the central flat plate portion 16B are flush with each other. Further, as shown in an enlarged view in FIG. 5, a retaining protrusion 90 integrally formed with the hole closing member 25 bites into an end of the hole inner side surface 14 </ b> A on the support wall 20 side. The retaining protrusion 90 is substantially flush with the lower surface of the hole closing member 25, and an inclined surface inclined obliquely downward from an intermediate position in the thickness direction of the hole closing member 25 on the side surface of the hole closing member 25. The cross section has a substantially triangular shape.

  FIG. 3 shows an enlarged part of the molding die 30 according to the present invention. The lid 11 is molded in two colors by the molding die 30. In the figure, reference numeral 31 is a fixed mold corresponding to the “first mold” of the present invention, and reference numeral 32 is a movable mold corresponding to the “second mold” of the present invention.

  A surface of the fixed mold 31 facing the movable mold 32 is a first molding surface 31A according to the present invention, and the inner surface (lower surface) of the lid frame wall 13 and the hole closing member 25 is formed by the first molding surface 31A. Molded. In addition, the surface of the movable mold 32 that faces the fixed mold 31 is a second molding surface 32A according to the present invention, and the outer surface (upper surface) of the lid frame wall 13 is molded by the second molding surface 32A. . Further, the movable mold 32 is formed with a core receiving hole 32B having a rectangular cross section corresponding to the frame hole 14 in the lid 11, and the slide core 33 according to the present invention is received in the core receiving hole 32B. The surface of the slide core 33 facing the fixed mold 31 is a third molding surface 33A according to the present invention, and the outer surface (upper surface) of the hole closing member 25 is molded by the third molding surface 33A.

  The movable mold 32 moves linearly between a mold closing position joined to the fixed mold 31 and a mold opening position separated from the fixed mold 31. When the movable mold 32 is disposed at the mold closing position, the outer edge flat portions 31D and 32D provided on the outer edges of the first molding surface 31A and the second molding surface 32A come into contact with each other, and the first molding surface 31A and A first cavity 38 for molding the lid frame wall 13 is formed between the second molding surface 32A. Further, when the movable mold 32 moves from the mold opening position to the mold closing position, the slide core 33 is disposed at the initial position of the movable mold 32 and joined to the fixed mold 31, and the movable mold 32 is maintained at the mold closing position. In this state, the movable mold 32 moves to the core back position in the movable mold 32 (that is, cores back), and moves away from the fixed mold 31.

  Hereinafter, required portions in the first to third molding surfaces 31A, 32A, and 33A will be described in detail. On the first molding surface 31A, an annular groove 40 is recessed and formed along the outer edge portion of the portion facing the third molding surface 33A. The annular groove 40 has a width straddling the portion facing the third molding surface 33A and the portion facing the movable mold 32 of the first molding surface 31A. Specifically, as shown in FIGS. 4A and 5, the annular groove 40 is bisected in the width direction by an annular imaginary line L <b> 1 that extends the outer surface of the slide core 33 and intersects on the first molding surface 31 </ b> A. The portion of the annular groove 40 that is located on the inner side of the annular imaginary line L1, that is, the portion of the annular groove 40 that is disposed in the region facing the third molding surface 33A of the first molding surface 31A is This is a support wall molding portion 41 for molding 20.

  On the other hand, a portion outside the annular imaginary line L1 in the annular groove 40, that is, a portion of the annular groove 40 that is disposed in a region facing the second molding surface 32 </ b> A in the first molding surface 31 </ b> A is It is an annular rib forming portion 42 (corresponding to the “opening edge protrusion forming portion” of the present invention) for forming the rib 17, and is deeper in a stepped form than the support wall forming portion 41.

  As shown in FIG. 3, a resin injection hole 35 is opened in the center of the inner portion of the first molding surface 31 </ b> A from the annular groove 40. Further, the entire portion of the first molding surface 31A facing the third molding surface 33A is substantially flat except for the resin injection hole 35 and the support wall molding portion 41. Further, the entire third molding surface 33A is also a substantially flat surface.

  As shown in FIG. 4 (A), the outer portion of the first molding surface 31A from the annular groove 40 is a flat inner surface molding portion 43 that is flush with the inner portion of the annular groove 40. A reinforcing rib forming groove 45K for forming the reinforcing rib 19 (see FIG. 1B) of the lid frame wall 13 is formed, and a jet port of the resin injection hole 34 is opened. On the other hand, the outer portion of the core receiving hole 32B in the second molding surface 32A is a flat outer surface that is opposed to the flat inner surface molding portion 43 by the thickness of the lid frame wall 13 at the mold closing position of the movable mold 32. A molding portion 44 is provided. Then, as shown in FIG. 4A, in the state where the slide core 33 is disposed at the initial position, the slide core 33 protrudes from the flat outer surface molding portion 44 toward the fixed mold 31 and becomes the third molding surface. In the state where 33A is joined to the first molding surface 31A and the slide core 33 is disposed at the core back position as shown in FIG. 4B, the tip surface (third molding surface 33A) of the slide core 33 is flat. The outer surface molding portion 44 is flush with each other, and the second cavity 39 is formed between the third molding surface 33A and the first molding surface 31A.

  This completes the description of the configuration of the present embodiment. Next, a method for manufacturing the lid 11 using the molding die 30 will be described. In the molding die 30 of this embodiment, the slide core 33 is disposed at the initial position when the movable die 32 moves relative to the stationary die 31 from the die opening position to the die closing position, as shown in FIG. In addition, the first cavity 38 is formed in the molding die 30. At this time, the first cavity 38 is not only between the first molding surface 31A of the stationary mold 31 and the second molding surface 32A of the movable mold 32, but also the first molding surface 31A of the stationary mold 31 and the first of the slide core 33. The support wall 20 is also integrally formed with the lid frame wall 13 at the support wall molding portion 41 between the first molding surface 31A and the third molding surface 33A of the first cavity 38. Is done. Further, the side surface 33S of the distal end portion of the slide core 33 becomes a part of the inner surface of the first cavity 38 and forms the hole inner side surface 14A (see FIG. 2) of the frame hole 14.

  Then, after the lid frame wall 13 is formed in the first cavity 38, the slide core 33 moves to the core back position (that is, the core backs). Thereby, the second cavity 39 for molding the hole closing member 25 is formed as a withdrawal space after the core back of the slide core 33, and the support wall 20 molded by the support wall molding portion 41 is formed in the second cavity 39. The inner surface 14 </ b> A of the frame hole 14 in the lid frame wall 13 is also exposed in the second cavity 39. In this state, molten resin for forming the hole closing member 25 is injected into the second cavity 39 to form the hole closing member 25, and is fixed to the inner side surface 14 </ b> A of the frame hole 14 and the support wall 20. At this time, due to the resin pressure in the second cavity 39, the retaining protrusion 90 that bites into the end of the inner surface 14A on the side of the support wall 20 is integrally formed with the hole closing member 25 (see FIG. 5). Specifically, in the lid body 11 of the present embodiment, the end portion of the support wall 20 is integrated with the annular rib 17 protruding from the opening edge of the frame hole 14, so the support wall 20 side of the hole inner side surface 14 </ b> A. Is positioned in the middle of the opening edge of the frame hole 14 in the thickness direction. Thereby, in the process in which the lid frame wall 13 is molded from the molten resin, the solidification of the end portion on the support wall 20 side is slower than the end portion on the opposite side of the support wall 20 in the hole inner side surface 14A. Thereby, after the lid frame wall 13 is molded, when the molten resin is injected into the second cavity 39 before the hole inner side surface 14A is completely solidified, the resin pressure causes the inner wall surface 14A of the hole inner side surface 14A on the support wall 20 side. A retaining protrusion 90 that bites into the end is integrally formed with the hole closing member 25. When the hole closing member 25 is molded and solidified as described above, the movable mold 32 is moved to the mold opening position together with the slide core 33, the lid body 11 is taken out from the molding die 30, and the lid body 11 is molded. Complete.

  Thus, in the molding die 30 of this embodiment, the lid frame wall 13 including the support wall 20 is formed before the second cavity 39 for molding the hole closing member 25 is formed in the molding die 30. Since the first cavity 38 for molding is formed in the molding die 30, there is no restriction that the front and back of the opening edge portion of the lid frame wall 13 always have the same shape as in the conventional molding die, The degree of freedom of the shape of the support wall 20 is increased. Therefore, according to the molding die 30 of the present embodiment, the conventional molding is performed such that the annular rib 17 is provided at the opening edge of the lid frame wall 13 for reinforcement, and the support wall 20 is provided on the annular rib 17. The support wall 20 that cannot be molded with the mold can be provided on the lid 11. Further, in the lid body 11 formed in this way, the side surface of the hole closing member 25 is fixed to the inner side surface 14A of the lid frame wall 13, and the outer edge of the lower surface of the hole closing member 25 is the lid frame wall 13. Therefore, the support strength of the hole closing member 25 can be made higher than before. Further, since the retaining protrusion 90 (see FIG. 5) that bites into the end portion on the support wall 20 side of the hole inner side surface 14A is integrally formed with the hole closing member 25, the lid frame wall 13 and the hole closing member 25 are coupled to each other. You can increase your power.

[Second Embodiment]
The lid 11 of the present embodiment is shown in FIGS. 6 to 8, and in addition to the support wall 20 described in the first embodiment, a rib-shaped support wall extending across the lower portion of the hole closing member 25. 22 (hereinafter referred to as “rib-shaped support wall 22”) is significantly different from the lid 11 of the first embodiment. Specifically, the rib-like support wall 22 is formed by extending the reinforcing rib 19 described in the first embodiment, and intersects in a lattice shape below the hole closing member 25. Further, as shown in FIG. 7, each rib-like support wall 22 has a rib flange 22F projecting to both sides from the upper end, and the upper end of the rib-like support wall 22 including the rib flange 22F is a hole closing member. It is fixed to the lower surface of 25. Further, the lower surface of the rib-like support wall 22 and the lower surface of the reinforcing rib 19 are flush with each other (see FIG. 7).

  As shown in FIG. 7, the inner surface 17A of the annular rib 17V is different from the first embodiment in that the inner surface 17A is positioned closer to the inside of the frame hole 14 than the inner surface 14A of the frame hole 14.

  8A and 8B show a molding die 30V for molding the lid 11V described above. In the molding die 30V, a plurality of support wall molding grooves 45 corresponding to the rib-like support walls 22 are formed in a portion of the first molding surface 31A facing the third molding surface 33A, and the reinforcing rib 19 is molded. It communicates with the reinforcing rib forming groove 45K. Further, in order to provide the rib flange 22F on the rib-shaped support wall 22, the support wall forming groove 45 is wider at the opening end on the third forming surface 33A side than the back part away from the third forming surface 33A.

  According to the molding die 30V of the present embodiment, the “support wall molding for molding the rib-like support wall 22 by closing the support wall molding groove 45 formed on the first molding surface 31A with the third molding surface 33A. The rib-like support wall 22 extending across the frame hole 14 can be formed with a simple mold structure, and the hole closing member 25 that cannot be formed with a conventional mold. A wide rib-like support wall 22 can be formed.

[Third Embodiment]
This embodiment is shown in FIG. 9 and is different from the second embodiment in that the hole closing member 25 is received in the frame hole 14 so as to be separated from the inner surface 14A of the hole. That is, in the lid body 11W of the present embodiment, as shown in FIG. 9B, the hole closing member 25 is in a state where a gap is formed between the frame hole 14 of the lid frame wall 13W and the hole inner side surface 14A. And are fixed to the support wall 20 and the rib-like support wall 22W. In addition, the rib-like support wall 22 of the present embodiment has a cross-sectional shape in which the fixing width with respect to the hole closing member 25 is larger than the protruding amount from the hole closing member 25, for example.

  In the molding die 30W for molding the lid 11W, as shown in FIG. 9A, the second molding surface 32A is provided with an annular projection 32T protruding from the opening edge of the core receiving hole 32B. Yes. And the hole inner side surface 14A of the frame hole 14 is shape | molded by the outer surface of the cyclic | annular protrusion 32T. In addition, in a state where the slide core 33 is disposed at the initial position, the third molding surface 33A and the tip surface of the annular protrusion 32T are flush with each other, the slide core 33 cores back, and the second cavity 39 is molded. Then, the outer surface of the hole closing member 25 is formed on the inner surface of the core receiving hole 32B. For parts other than those described above, the same components as those in the first to third embodiments are denoted by the same reference numerals in FIG.

[Fourth Embodiment]
As shown in FIG. 10 (B), the lid body 11X of the present embodiment has a rib-like shape in that the lower surface outer edge portion of the hole closing member 25X is fixed to the upper surface opening edge of the frame hole 14 in the lid frame wall 13X. The point from which the support wall 22W is arrange | positioned in the frame hole 14 differs from 3rd Embodiment. In the molding die 30X for molding the lid 11X, as shown in FIG. 10A, the third molding surface 33A and the second molding surface 32A are in a state where the slide core 33 is disposed at the initial position. The flat outer surface molding portion 44 is flush with the surface. Regarding parts other than those described above, the same components as those in the first to third embodiments are denoted by the same reference numerals in FIG.

[Other Embodiments]
The present embodiment is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present embodiment, and further, within the scope not departing from the gist other than the following. Various modifications can be made.

  (1) In the first embodiment, the example in which the “wall structure of the transport container” of the present invention is applied to the lid 11 as the upper surface wall of the transport container 10 is shown. A hole is formed and the wall through hole is closed with a resin hole closing member different from the bottom wall, or a wall through hole is formed in a side wall that can be attached to and detached from the bottom wall. The present invention may be applied to a case in which is closed with a resin hole closing member different from the side wall.

  (2) In the lid body 11 of the first embodiment, the hole closing member 25 is made of a transparent resin, while the lid frame wall 13 as a “container constituting wall” is made of an opaque resin. However, the difference between the two types of resins to be subjected to two-color molding is not limited to the difference between transparent and opaque. Specifically, the material characteristics such as elasticity, hardness, specific gravity and the like are different, and both the “hole closing member” and the “container constituting wall” according to the present invention may be made of a transparent (or both opaque) resin. Further, the “hole closing member” and the “container constituting wall” according to the present invention may be made of resins having the same chemical composition but different in color (including transparent or opaque).

  (3) In the first embodiment, the example in which the support wall 20 that supports the hole closing member 25 is arranged on the inner surface of the lid body 11 is shown. However, the “support wall” according to the present invention is provided on the outer surface of the lid body. May be arranged.

  (4) In the first embodiment, the frame hole 14 corresponding to the “wall through hole” according to the present invention is a quadrangle, but the “wall through hole” is not limited to a quadrangle, but is a circle or a quadrangle. Other polygons may be used.

  (5) The hole closing member 25 of the first embodiment is a flat plate shape, but is not limited thereto, and may be a plate shape that is partially bent or uneven. The whole may be curved in a dome shape.

  (5) In the first embodiment, the “first mold” according to the present invention is a fixed mold that is fixed to the ground, and the “second mold” according to the present invention is movable with respect to the ground. Although it was a mold, the opposite may be possible.

  (6) The retaining protrusion 90 of the first embodiment protrudes from the hole closing member 25 toward the hole inner surface 14A and engages with the lid frame wall 13 only in the axial direction of the frame hole 14. As shown in FIG. 4, the retaining protrusion 90A protrudes not only from the hole inner surface 14A side but also to the support wall 20 side from the hole closing member 25, and the lid frame wall 13 in both the axial direction and the axis orthogonal direction of the frame hole 14. The thickness and height of the annular rib 17 and the resin pressure of the injection molding may be set so that the retaining protrusion 90A that engages with the resin is molded. Thereby, the engagement between the hole closing member 25 and the lid frame wall 13 becomes stronger.

[Appendix]
Although not belonging to the scope of claims of the present invention, using the technology of the present invention, the following configuration is used to improve the coupling strength between the hole closing member and the container constituent wall (lid frame wall 13). You may strengthen it. Specifically, for example, as shown in FIG. 12, the thickness of the lid frame wall 13 is made by projecting the opening edge protrusion 91 from the opening edge of the frame hole 14 in the lid frame wall 13 without providing a support wall. One end in the thickness direction of the hole closing member 25 is disposed in the middle portion in the vertical direction, and the hole blocking member includes a retaining protrusion 92 that protrudes from one end in the thickness direction of the hole closing member 25 and bites into the lid frame wall 13. 25 may be integrally formed. Further, as shown in FIG. 13, the opening edge of the frame hole 14 in the lid frame wall 13 is made thicker than the other part of the lid frame wall 13 by the opening edge projection 93, and the intermediate portion in the thickness direction thereof. An intermediate portion in the thickness direction of the hole closing member 25 is disposed in the hole closing member 25, and a retaining projection 94 that protrudes from the intermediate portion in the thickness direction of the hole closing member 25 and bites into the lid frame wall 13 is integrated with the hole closing member 25. You may shape | mold. Further, although not shown, the lid frame wall may have a uniform thickness, and a part of the hole closing member may be bitten into the lid frame wall at an intermediate portion in the thickness direction of the lid frame wall. The hole closing member may be formed first from the frame wall, and a part of the hole closing member may be bitten into the lid frame wall side. That is, “the container constituent wall is in a state where a hole closing member is fixed to the inner side surface of the wall through hole of the container constituent wall of any one of the side surface, the lower surface or the upper surface of the transport container and the wall through hole is closed. In the wall structure of the transport container in which the hole closing member is molded in two colors, the retaining protrusion that bites into the inner surface of the hole at the intermediate portion in the thickness direction of the container constituting wall at the opening edge of the wall through-hole A transport container that is integrally formed with the hole closing member, or a retaining projection that bites into the side surface of the hole closing member at the intermediate portion in the thickness direction at the outer edge of the hole closing member. By using the “wall structure”, the bonding strength between the hole closing member and the container constituting wall may be enhanced.

10 Transport container 11, 11V, 11W, 11X Lid 13, 13W, 13X Lid frame wall 14 Frame hole (wall through hole)
14A Hole inner surface 20 Support wall 22, 22W Rib-shaped support wall 22F Rib flange 25 Hole closing member 30, 30V, 30W, 30X Molding die 31 Fixed die (first molding die)
31A First molding surface 31A, 32A, 33A Molding surface 31D, 32D Flat outer edge portion 32 Movable die (second molding die)
32A Second molding surface 32B Core receiving hole 33 Slide core 33A Third molding surface 33S End side surface 38 First cavity 39 Second cavity 41 Support wall molding portion 42 Annular rib molding portion 45 Support wall molding groove (opening edge projection molding) Part)
90,90A Retaining protrusion

Claims (8)

The container constituent wall and the hole are closed in a state where a hole closing member is fixed to the inner surface of the hole of the wall through hole of the container constituent wall on the side surface, the lower surface or the upper surface of the transport container and the wall through hole is closed. In the wall structure of the transport container in which the member is molded in two colors,
It is molded as a part of the container constituting wall and protrudes from the inner surface of the hole along the inner or outer surface of the hole closing member to the inside of the wall through hole or across the wall through hole. A wall structure of a transport container, comprising a support wall extending and fixed to the hole closing member. Either one of the inner and outer surfaces of the container constituting wall is formed so that an opening edge protrusion protrudes from the opening edge of the wall through hole, and the end of the support wall is integrated with the opening edge protrusion. Provided in
2. The wall structure of a transport container according to claim 1, wherein the hole closing member is formed with a retaining protrusion that bites into an end portion on the support wall side of the inner surface of the hole. A molding die that performs two-color molding of the container constituent wall and the hole closing member in a state in which the wall through-holes of the container constituent walls on the side surface, lower surface, or upper surface of the transport container are closed by the hole closing member. ,
A first molding die having a first molding surface for molding one of the inner and outer surfaces of the container constituting wall and the hole closing member;
A mold closing position that has a second molding surface for molding the other inner and outer surfaces of the container constituting wall, and is linearly moved relative to the first molding die and joined to the first molding die; A second mold having a core receiving hole that can be disposed at a mold opening position spaced apart from the one mold, and has an opening in the second molding surface;
An initial position at which the third molding surface for molding the other surface inside and outside of the hole closing member is received at the tip, and the third molding surface is joined to the first molding surface by being received in the core receiving hole; A slide core that linearly moves between the core back position spaced apart from the first molding surface,
When the second mold is moved from the mold open position to the mold close position, the slide core is disposed at the initial position, and a first cavity is formed in the mold to mold the container constituting wall. And forming a second cavity in the molding die for molding the hole closing member by moving the slide core to the core back position after molding the container constituting wall by the first cavity. And
The first cavity is formed in a state communicating between the first molding surface and the second molding surface and between the first molding surface and the third molding surface, A support wall of the container constituting wall formed by a support wall forming portion disposed between the first forming surface and the third forming surface of the cavity is used as the hole closing member formed by the second cavity. A molding die characterized by being configured to be fixed.   The tip side surface of the slide core disposed at the initial position is formed as a part of the inner surface of the first cavity so as to form the inner surface of the wall through hole. The molding die described in 1. Between the first molding surface and the second molding surface in the first cavity, the container constituting wall protrudes from the opening edge of the wall through hole and is integrated with the end portion of the support wall. An opening edge protrusion forming part for forming the opening edge protrusion is provided,
A retaining protrusion that bites into an end of the inner surface of the hole on the side of the support wall can be integrally formed with the hole closing member by the pressure of the resin for molding the hole closing member injected into the second cavity. The molding die according to claim 4, wherein   6. The support wall molding portion is formed by closing a support wall molding groove formed on the first molding surface and extending across the core receiving hole with the third molding surface. The molding die according to claim 1.   The molding die according to claim 6, wherein the support wall molding groove has an opening end on the third molding surface side that is wider than a back part away from the third molding surface.   A method for manufacturing a transfer device, wherein the transfer container or the cover for the transfer container is manufactured using the molding die according to any one of claims 3 to 7.

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