JP5413975B2 - Wall structure of transfer container - Google Patents

Description

The present invention provides a transfer container in which a container constituting wall on either the side surface, the lower surface or the upper surface of a carrying container and a hole closing member which closes a wall through hole penetrating the container constituting wall are molded in two colors with different resins. about the Kabe構elephant container.

Conventionally, those shown in FIG. 10 (A) as an example of a molding die for molding the conveying container of this type, first and second cavity 4 formed between the molding die 1 and 2, cylinder the mold core 3 is divided into a main cavity 4A and sub-cavity 4B, and a cylindrical core 3 by molding the pore blocking member 8 in the sub-cavity 4B and core back (see FIG. 10 (B)), the main cavity 4A Thus, the container constituting wall 6 was formed. 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. 11B , 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 the molding die, a stepped recess portion 3A may be provided on the cylindrical core 3 as shown in Figure 11 (a). 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. Further, 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. 11B) , 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 an object thereof is to provide a Kabe構forming a transport container which can be higher than conventional strength of supporting hole closing member.

In order to achieve the above object, the wall structure of the transport container according to the invention of claim 1 has a hole on the inner side surface of the wall through-hole penetrating the container constituting wall on either the side surface, the lower surface or the upper surface of the transport container. 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 closing member is fixed and the wall through hole is closed, the wall penetration on either the inner or outer surface of the container constituting wall An opening edge protrusion that protrudes from the opening edge of the hole and has an inner wall through hole, and a support wall that protrudes from the opening edge protrusion to the inside of the wall through hole and has an inner wall through hole are provided and supported. The wall is fixed to one of the inner and outer surfaces of the hole closing member, and the hole closing member has a feature in that a retaining protrusion is provided at a position closer to the support wall on the inner surface of the hole .

According to the wall structure of the transport container of the present invention , the hole closing member is fixed to the inner surface of the wall through hole in the container constituting wall, and further inside the opening edge protrusion protruding from the opening edge of the wall through hole. Since the support wall is overhanging and the support wall is fixed to either the inside or the outside of the hole closing member, the support strength of the hole closing member is higher than the conventional one. Here, the position closer to the support wall 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, and in the process of forming the container constituent wall from the molten resin, Of these, the end of the support wall is solidified later than the end of the support wall opposite. 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 has bitten into the position near the support wall on the inner surface of the hole due to the pressure of the molten resin for forming the hole closing member is provided. Can be molded. And the coupling | bonding force of a container structural wall and a hole obstruction | occlusion member can be heightened by this retaining protrusion.

(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 Cross-sectional view of a molding die and a lid showing a modification of the retaining projection (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. And the “wall structure of the transport container” according to the present invention is applied to 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.

3, a portion of the formed metal mold 30 is shown enlarged. The lid 11 is molded in two colors by the molding die 30 .

A surface of the fixed mold 31 facing the movable mold 32 is a first molding surface 31A, and the inner surface (lower surface) of the lid frame wall 13 and the hole closing member 25 is molded by the first molding surface 31A. In addition, the surface of the movable mold 32 that faces the fixed mold 31 is a second molding surface 32A, and the outer surface (upper surface) of the lid frame wall 13 is molded by the second molding surface 32A. Further, the movable die 32, the core receiving bore 32B of square section corresponding to Wakuana 14 in lid 11 is formed, on its core receiving bore 32B, the scan Raidokoa 33 is received. A surface of the slide core 33 facing the fixed mold 31 is a third molding surface 33A, 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 the support wall of the lid frame wall 13. This is a support wall molding portion 41 for molding 20.

On the other hand, a portion outside the annular imaginary line L1 of the annular groove 40, that is, a portion of the annular groove 40 that is disposed in a region facing the second molding surface 32A of the first molding surface 31A is an annular shape in the lid frame wall 13. they become annular rib forming portion 4 2 for molding the ribs 17, it is deeper in the stepped shape 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 that the end surface of the hole inner surface 14 </ b> A is closer to the support wall 20. The position is located 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. As a result, when the molten resin is injected into the second cavity 39 after the lid frame wall 13 is molded and before the hole inner side surface 14A is completely solidified, the resin pressure causes the position closer to the support wall 20 on the hole inner side surface 14A. A retaining projection 90 that bites into the hole closing member 25 is integrally formed. 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 hole inner side surface 14A near the support wall 20 is integrally formed with the hole closing member 25, the coupling force between the lid frame wall 13 and the hole closing member 25 is increased. Can be increased.

[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.

[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.

(6) the retaining projection 90 of the first embodiment has been engaged with the lid frame wall 13 only in the axial direction of the Wakuana 14 protrudes from the hole closing member 25 into the hole inner surface 14A side, FIG. 9 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.

10 Transport container 11, 11 V lid 1 3 Cover 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 90, 90A Retaining protrusion

Claims (1)

The container constituting wall and the hole in a state where a hole closing member is fixed to the inner side surface of the wall through hole penetrating the container constituting wall on 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 closing member is molded in two colors,
An opening edge protrusion that protrudes from the opening edge of the wall through-hole on one of the inner and outer surfaces of the container-constituting wall, and the inner side is the wall through-hole, and an inner side of the wall through-hole from the opening edge protrusion And a support wall extending inside and forming the wall through-hole, and the support wall is fixed to either the inner or outer surface of the hole closing member, and the hole closing member includes the hole A wall structure of a transport container, characterized in that a retaining protrusion that bites into a position near the support wall on an inner surface is provided .

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