JP5138566B2 - Box container - Google Patents

Description

  The present invention relates to a box-type container used for transportation of articles.

In general, a box-shaped container used for conveying articles and the like includes a substantially rectangular bottom wall portion and side wall portions extending upward from four side portions of the bottom wall portion, and an upper opening. It is the structure which takes in / out goods from a part. In addition, a discharge opening is formed on the side wall, a door member that can open and close the discharge opening is provided, and the discharge opening is opened, so that articles stored inside the box-shaped container can be There are some which are configured to be able to be discharged (see, for example, Patent Documents 1 and 2). By adopting this configuration, it is possible to improve the discharge efficiency of the articles accommodated in the box-type container.
JP 2006-123932 A JP 2007-276870 A

  The box-type container of Patent Document 1 is provided with a latch mechanism capable of opening the door member in stages while the door member is rotatably provided to the main body via a hinge part. However, in the configuration in which the hinge portion and the latch mechanism are provided in this way, the structure becomes complicated, which causes an increase in cost and an increase in the number of man-hours required for manufacturing, and there is a concern that the device may easily break down. On the other hand, since the box-shaped container of Patent Document 2 is configured to open and close the discharge opening by sliding the door member up and down, it can be said that there is not much risk of cost increase or failure.

  By the way, regarding the box-shaped container of Patent Document 2, guide grooves for guiding both side portions of the door member when opening and closing the discharge opening are formed so as to dent the inner side surface of the side wall portion outward. However, when such a guide groove is formed by a movable mold that can move up and down (for example, a movable mold for forming the inner surface of the main body), the taper that widens the guide groove upward for convenience of die cutting. It must be configured in a shape. For this reason, the groove width differs between the lower end portion and the upper end portion of the guide groove, and a relatively large gap may be formed between the upper end portion of the guide groove and the door member. Then, due to the gap, there is a concern that the door member may vibrate (rattle) during transportation or the like, and in some cases, the door member may be lifted. In particular, when the box-shaped container is large and the guide groove is formed long in the vertical direction, such a problem becomes even more remarkable.

  The present invention has been made in order to solve the above-described problems, and its object is to provide a structure having an opening for discharging articles on a side wall and a door member for opening and closing the opening. An object of the present invention is to provide a box-type container that can suppress complications and can prevent rattling of a door member.

  In the following, each means suitable for solving the above-mentioned purpose will be described in terms of items. In addition, the effect etc. peculiar to a corresponding means are added as needed.

Means 1. A substantially rectangular bottom wall portion, a pair of first side wall portions extending upward from opposite side portions of the bottom wall portion, and one side portion of the pair of first side wall portions are connected to each other. 2 side walls, and a third side wall for connecting the other side of the pair of first side walls, and each wall is integrally formed by molding to form a box shape that opens upward. A body portion having a discharge opening formed at the lower portion of the second side wall portion and capable of discharging an article housed inside from the side to the outside;
In a box-shaped container comprising a door member capable of opening and closing the discharge opening,
A pair of first groove portions that project from the pair of first side wall portions to the inside of the main body portion and extend in the vertical direction, and that form guide grooves that can be inserted through the side portions of the door member between the second side wall portions. With guide ribs,
Each guide rib is opposed to the inner side surface of the second side wall portion above the discharge opening, and forms a guide groove having a substantially U-shaped cross section with the inner side surface of the second side wall portion; An opening facing surface connected to the lower side of the groove forming surface and facing the discharge opening;
The groove forming surface is formed by a first movable mold movable along the opening direction of the main body portion surrounded by the first, second, and third side wall portions,
A box shape characterized in that the opening facing surface is movable along the thickness direction of the second side wall and is formed by a second movable mold for forming the discharge opening. container.

  According to the means 1, the door member is slid up and down along the guide groove formed between the guide rib extending in the up and down direction and the second side wall portion, thereby discharging for discharge formed in the second side wall portion. The opening is opened and closed. Accordingly, the structure can be simplified as compared with a configuration in which the door member is provided so as to be rotatable with respect to the main body portion and a latch mechanism or the like for regulating the operation of the door member is provided. As a result, costs can be reduced and man-hours required for manufacturing can be reduced, and failures due to complicated structures are unlikely to occur.

  Further, according to this means 1, the groove forming surface of the guide rib is formed in the opening direction of the main body part surrounded by the first, second and third side wall parts (the main body part is positioned so that the bottom wall part is located on the lower side). In the case of molding, the first movable mold is movable along the vertical direction). Therefore, the groove forming surface is configured as an inclined surface that is inclined upward toward the third side wall portion in order to release the first movable mold.

  On the other hand, the opening facing surface of the guide rib is formed by a second movable mold that is movable along the thickness direction of the second side wall (the opening direction of the discharge opening). Therefore, with respect to the opening facing surface, the inclination can be freely configured, such as inclining upward toward the second side wall or extending perpendicularly to the upper surface of the bottom wall. it can.

  In this way, by forming the opening facing surface by the second movable mold, the length in the vertical direction of the groove forming surface that has to be formed by inclining upward toward the third side wall portion side is shortened. It is possible to reduce the difference between the width of the guide groove at the upper edge portion of the groove forming surface and the width of the guide groove at the lower edge portion of the groove forming surface. For this reason, the clearance gap formed between the door member and the guide rib (guide groove) in which both sides are inserted into the guide groove and the discharge opening is closed can be minimized. As a result, rattling of the door member can be suppressed, and consequently problems such as lifting of the door member due to the shakiness can be suppressed.

Mean 2. A regulating means for regulating upward displacement of the door member in a state in which the discharge opening is closed;
The regulating means is
When forming the main body, an engagement hole formed in the second side wall above the discharge opening;
The box-shaped container according to claim 1, further comprising an engagement protrusion that is integrally formed with the door member and engages with the engagement hole in a closed state of the discharge opening by the door member. .

  According to the means 2, the upward displacement of the door member in the state where the discharge opening is closed can be restricted by the restricting means. For this reason, it is possible to prevent a situation in which the door member is displaced upward against the intention and the discharge opening is opened. In addition, since the engagement protrusion and the engagement hole are brought into the engagement state, the effect of suppressing the rattling of the door member is more reliably achieved. Furthermore, the engagement hole is formed in the second side wall portion when the main body portion is formed, and the engagement protrusion is formed integrally with the door member. For this reason, it is not necessary to attach a regulating means prepared separately or to form an engagement hole by a separate process, and it is possible to improve manufacturing efficiency.

Means 3. The lower surface of the door member is provided with a locking projection that projects downward,
The means 1 or 2 characterized by the above-mentioned. WHEREIN: The to-be-latched part by which the said latching convex part is latched is provided in the closed state of the said opening part for discharge by the said door member. Box container.

  According to the means 3, the shifting movement of the lower end portion of the door member in the state where the discharge opening is closed can be restricted by the locking projection being locked to the locked portion. Therefore, rattling of the door member can be prevented more reliably. Further, under the configuration of the means 2, since the shift movement of the lower end portion of the door member is restricted, the situation where the engagement state between the engagement protrusion and the engagement hole is released is further increased. It becomes easy to deter.

  Means 4. The box-shaped container according to any one of means 1 to 3, wherein a handle is provided on an upper portion of the third side wall portion facing the second side wall portion.

  According to the means 4, the main body can be inclined relatively easily toward the second side wall by lifting the handle. Further, in the case of tilting the box container by lifting the bottom wall portion, the tilted box container is easily supported by the handle. Therefore, it is possible to improve the workability when discharging the articles stored in the box-shaped container from the discharge opening, and it is possible to stably support the tilted box-shaped container. When the container is tilted, it is possible to prevent a situation in which the box-shaped container is displaced and moved.

  Hereinafter, an embodiment will be described with reference to the drawings. As shown in FIG. 1, FIG. 2, etc., the box-type container 1 is configured in a box shape opened upward, and a discharge opening 3 for discharging articles accommodated on the inside from the side to the outside. And a door member 4 configured to be detachable from the main body 2 and capable of opening and closing the discharge opening 3. In the present embodiment, both the main body 2 and the door member 4 are made of polypropylene.

  The main body 2 includes a substantially rectangular bottom wall portion 11, a pair of first side wall portions 12 extending upward from opposing long side portions of the bottom wall portion 11, and a pair of first side wall portions 12. It has the 2nd side wall part 13 which connects side parts, and the 3rd side wall part 14 which connects the other side parts of a pair of 1st side wall part 12. In the present embodiment, these wall portions 11, 12, 13, 14 are integrally formed by molding, and the discharge opening 3 is formed below the second side wall portion 13 during the molding. Yes. Furthermore, the inner side surfaces of the side wall portions 12, 13, 14 are slightly inclined (for example, about 2 degrees) toward the upper side and the outside of the main body portion 2. Further, reinforcing ribs 16 extending in a lattice shape are formed on the outer side surfaces of the side wall portions 12, 13, and 14 and the lower surface of the bottom wall portion 11. In addition, a drainage slit 17 is formed in a portion of the first and third side wall portions 12 and 14 that is located below the upper edge portion of the discharge opening 3 and the bottom wall portion 11. Yes.

  Legs 18 that support the main body 2 are provided on the bottom surface of the bottom wall 11. The leg portions 18 are provided in the vicinity of the four corners of the bottom wall portion 11, at substantially the middle position of each side portion, and at the central portion of the bottom wall portion 11 (total of nine locations). A fork insertion portion 19 into which the fork can be inserted is formed. Moreover, the leg part 18 is provided inside the peripheral part of the bottom wall part 11, and when a plurality of box-shaped containers 1 are stacked, the side walls 12, 13, and 14 of the lower box-shaped container 1 are stacked. The leg portion 18 of the upper box-shaped container 1 is fitted and positioned on the inner surface. Thereby, the box-type container 1 can be stacked stably.

  Further, the second side wall portion 13 of the present embodiment is configured in a gate shape, and the discharge opening 3 is formed between the second side wall portion 13 and the bottom wall portion 11. For this reason, the lower edge portion of the discharge opening 3 is flush with the bottom surface of the main body 2 (the top surface of the bottom wall portion 11). In addition, the second side wall 13 is formed with engagement holes 21 penetrating in the thickness direction of the second side wall 13 at two positions on the left and right sides in the vicinity of the upper side (see FIG. 2 and the like). As shown in FIG. 2, FIG. 4, and the like, a rib 22 is formed on the outer surface of the second side wall portion 13 so as to surround the engagement hole 21.

  The third side wall portion 14 extends upward from the short side portion of the bottom wall portion 11 on the side opposite to the second side wall portion 13 to form a substantially plate shape, and both ends thereof are a pair of first side wall portions. 12 is connected to the entire area in the vertical direction. Further, on the upper side portion of the third side wall portion 14, a discharge metal fitting 23 is provided that serves as a handle when the main body portion 2 is tilted to discharge an article stored in the box-shaped container 1 from the discharge opening portion 3. Yes. More specifically, the discharge metal fitting 23 is penetrated by a metal fitting body 24 formed by bending a single metal plate into a U-shape and fixing holes 25 formed on both side walls of the metal fitting body 24. A substantially cylindrical insertion pin 26 is provided. The insertion pin 26 has a head (not shown) at one end and a screwed portion (not shown) in which a male screw is formed on the other end.

  Furthermore, a fitting recess 28 into which the metal fitting body 24 is fitted is formed on the upper side portion of the third side wall portion 14. In addition, attachment holes (not shown) are formed in the reinforcing ribs 16 constituting the side surfaces of the fitting recesses 28 corresponding to the fixing holes 25 of the metal fitting body 24. Then, the outer surface of the metal fitting body 24 is brought into contact with the inner surface of the fitting recess 28 to align the fixing hole 25 and the mounting hole, and the insertion pin 26 penetrates the pair of fixing holes 25 and the mounting hole. After that, the metal fitting for discharge 23 is attached to the main body 2 by screwing a nut into the screwed portion of the insertion pin 26. In the present embodiment, the discharge metal fittings 23 are provided at two places on the left and right sides with a predetermined distance therebetween. In addition, the metal fitting 23 for discharge | emission is comprised by the fitting recessed part 28, and becomes a structure which does not protrude from the 3rd side wall part 14 and the main-body part 2 inside. For this reason, the stacking of the box-shaped containers 1 can be realized as described above without being obstructed by the discharge fitting 23.

  In the present embodiment, for example, a forklift 91 as shown in FIG. 6 is used when discharging the articles stored in the box-type container 1. The forklift 91 includes a mast 93 provided so as to be tiltable with respect to the forklift main body 92 and a backrest 94 provided so as to be movable up and down with respect to the mast 93. The backrest 94 includes a pair of left and right forks 95 at the lower part and a wire attaching part 96 to which a wire 97 (hook 98 provided at the end of the wire 97) can be attached at the upper part. When discharging the articles stored in the box-type container 1, the fork 95 of the forklift 91 is inserted into the fork insertion part 19, and one hook 98 of the wire 97 provided with hooks 98 at both ends is attached. While attaching to the wire attaching part 96 of the backrest 94, the other hook 98 is attached to the insertion pin 26 of the metal fitting 23 for discharge | emission. In the state where the box-shaped container 1 is supported by the forklift 91 as described above, the backrest 94 is raised and the mast 93 is tilted forward, whereby the box-shaped container 1 (the main body portion 2) from which the door member 4 is removed. ) Can be inclined toward the second side wall portion 13 to discharge all the articles in the box-type container 1 from the discharge opening 3.

  Now, as shown in FIG. 3, FIG. 5, etc., the first and second side wall portions 12 are filled in the boundary portion between each first side wall portion 12 and the second side wall portion 13 so as to fill the corner portion inner region. The base part 31 extended from the upper edge part vicinity of 13 to the upper surface (bottom surface of the main-body part 2) of the bottom wall part 11 is provided. In addition, a guide rib 32 that protrudes from each base portion 31 toward the center in the width direction of the discharge opening 3 and forms a guide groove 33 that can be inserted into the side portion of the door member 4 between the second side wall portion 13 is provided. It has been. The guide rib 32 extends from the upper edge portion to the lower edge portion of the base portion 31. In the present embodiment, the discharge opening 3 is closed by inserting both side portions of the door member 4 into the guide grooves 33 and sliding the door member 4 downward until they contact the bottom wall portion 11. It becomes.

  The base portion 31 extends from the inner side surface of the second side wall portion 13 to the root portion of the guide rib 32, the door facing surface 35 facing the side surface of the door member 4 in the closed state of the discharge opening 3, and the first side wall portion 12. A guide surface 36 is provided which extends from the inner side surface to the root portion of the guide rib 32 and guides the article toward the discharge opening 3 when the article contained in the box-shaped container 1 is discharged. In the present embodiment, there is no step at the boundary between the side edge of the discharge opening 3 and the door facing surface 35, and both are flush with each other.

  The guide rib 32 is opposed to the inner side surface of the second side wall portion 13 and constitutes the guide groove 33 having a substantially U-shaped cross section together with the inner side surface of the second side wall portion 13 and the door corresponding surface 35 of the base portion 31. A forming surface 32 a and an opening facing surface 32 b that is connected to the lower side of the groove forming surface 32 a and faces the discharge opening 3 are provided.

  As will be described in detail later, the groove forming surface 32a is formed by a first movable mold 53 (see FIG. 7 and the like) that is movable in the vertical direction for forming the inner surface of the main body 2. It is slightly inclined (for example, about 2 degrees) toward the third side wall 14 side. The opening facing surface 32b is formed by a second movable mold 54 that is movable in the thickness direction of the second side wall 13 for forming the discharge opening 3, and is below and on the third side wall 14 side. Slightly inclined. In particular, in the present embodiment, the inclination of the opening facing surface 32b when the inner side surface of the first side wall portion 12 is viewed in front, the inclination of the surface on the third side wall portion 14 side of the guide rib 32, and the second side wall portion. The inclination of the inner surface of 13 is equal.

  Further, as shown in FIG. 3, a portion formed between the guide rib 32 (groove forming surface 32 a) and the second side wall portion 13 in the door facing surface 35 of the base portion 31, that is, the bottom surface of the guide groove 33. A portion for forming the groove (hereinafter referred to as “groove corresponding portion 35 a”) is formed by the first movable mold 53. Further, a portion of the door facing surface 35 formed between the guide rib 32 (opening facing surface 32b) and the discharge opening 3 (hereinafter referred to as “opening corresponding portion 35b”) is the second movable. Molded by the mold 54. In the present embodiment, the groove corresponding portion 35 a extends in parallel with the corresponding inner side surface of the first side wall portion 12, and the opening corresponding portion 35 b extends in parallel with the side edge portion of the discharge opening 3. Yes.

  In addition, the surface of the guide rib 32 on the third side wall portion 14 side is the second side wall portion 13 side (discharge opening portion 3 side) and the width of the discharge opening portion 3 in the same manner as the guide surface 36 of the base portion 31. Inclined toward the center of the direction. Therefore, when the article accommodated in the box-type container 1 is inclined from the discharge opening 3 by tilting the main body 2, the article is guided by the guide surface 36 of the base 31 and the third side wall of the guide rib 32. It will be guided to the 14th surface. For this reason, it is possible to prevent a situation where the article is caught on the guide rib 32 or the base portion 31 when the article is discharged and the article remains inside the box-type container 1. Since the surface of the guide rib 32 on the third side wall portion 14 side and the guide surface 36 of the base portion 31 are formed by the first movable mold 53, the guide rib 32 is inclined upward and outward of the main body 2 in the vertical direction. doing.

  Further, in the bottom wall portion 11, a portion constituting the lower surface of the space in which the door member 4 is accommodated in the closed state of the discharge opening 3 (portion located between the discharge opening 3 and the guide rib 32). Are formed with a locking recess 39 as a locked portion at three positions with a predetermined distance from each other. In addition, although mentioned later in detail, the latching recessed part 39 is shape | molded by the 1st movable mold 53 which shape | molds the inner surface etc. of the main-body part 2. FIG.

  As shown in FIG. 2 and the like, the door member 4 includes reinforcing ribs 41 extending in a lattice shape on one surface. In this embodiment, when closing the discharge opening 3 by the door member 4, the door member 4 is attached to the main body 2 so that the surface on which the reinforcing rib 41 is formed faces the outside of the box-type container 1. It is done. In addition, a draining slit 42 is formed in a portion of the door member 4 that closes the discharge opening 3 when attached to the main body 2.

  As shown in FIGS. 2 and 4, the door member 4 protrudes larger than the reinforcing rib 41, and the main body 2 is attached to the main body 2 (the discharge opening 3 is closed). The second side wall 13 is provided with an engagement protrusion 43 having a rectangular tube shape that engages with the engagement hole 21. Furthermore, the door member 4 includes a locking projection 44 that protrudes downward from the lower surface and is locked to a locking recess 39 formed in the bottom wall portion 11 of the main body 2 when attached to the main body 2. ing. The engaging protrusion 43 and the locking projection 44 are integrally formed with the door member 4 when the door member 4 is formed. Further, the upper end portion of the door member 4 in the attached state to the main body portion 2 is located slightly below the upper edge portions of the base portion 31 and the guide rib 32.

  Further, as shown in FIG. 3 and the like, a handle hole 46 penetrating in the thickness direction of the door member 4 is formed in the upper part of the door member 4, and a hand is inserted into the handle hole 46 so that the door member 4 can be removed from the main body 2 or the door member 4 can be carried. In addition, as shown in FIG. 2, the reinforcing rib 41 a constituting the upper edge portion of the handle hole 46 has a protruding length smaller than the other reinforcing ribs 41. For this reason, when the hand is inserted into the handle hole 46 in order to remove the door member 4 attached to the main body 2, the upper edge of the handle hole 46 can be easily grasped. Further, a rib 47 is provided between the reinforcing rib 41a and the reinforcing rib 41 (in this example, a portion forming the outer peripheral surface of the door member 4) facing the upper surface of the reinforcing rib 41a. Thus, the rigidity of the portion gripped by the operator when the door member 4 is carried is increased.

  Next, the mold apparatus 51 which shape | molds the main-body part 2 is demonstrated, referring FIGS. 7-11. For convenience, the front side when the discharge opening 3 is viewed from the front will be described as the front, and the back side will be described as the rear.

  As shown in FIG. 7 and the like, the mold apparatus 51 includes a first movable mold 53 that molds the inner surface of the main body 2 and a second movable mold 54 that molds the discharge opening 3. . Although not shown, the mold apparatus 51 includes a fixed mold that molds the lower surface of the bottom wall portion 11 and a movable mold that molds the outer surfaces of the side wall portions 12, 13, and 14. In the present embodiment, the inner surface of the discharge opening 3, the opening corresponding portion 35 b of the base portion 31, and the opening facing surface 32 b of the guide rib 32 are formed by the second movable die 54. Further, the first movable mold 53 allows the second movable mold 54 of the inner surfaces of the first, second, and third side wall portions 12, 13, 14, the upper surface of the bottom wall portion 11, the base portion 31, and the guide rib 32 to be used. The part excluding the part formed by the above and the locking recess 39 are formed.

  As shown in FIGS. 8 and 9, the first movable mold 53 includes a first molding surface 71 that molds the inner surface of the first side wall portion 12 and a second molding surface that molds the inner surface of the second side wall portion 13. A molding surface 72, a third molding surface (not shown) for molding the inner surface of the third side wall portion 14, and a fourth molding surface 74 for molding the upper surface of the bottom wall portion 11 are provided. Molding surfaces 71 and 72 that mold the inner surfaces of the side wall portions 12, 13, and 14 are slightly inclined upward and outward of the first movable mold 53. Further, a corner portion forming portion 77 for forming the base portion 31 and the guide rib 32 is formed at the boundary portion between the first forming surface 71 and the second forming surface 72. The details of the corner forming portion 77 will be described later.

  The second movable die 54 includes a substantially rectangular parallelepiped base 61 for forming the discharge opening 3 and a substantially rectangular parallelepiped guide forming portion 62 that protrudes rearward from the left and right side portions of the base 61. The plane is substantially U-shaped. In addition, the upper surface, the lower surface, and both side surfaces of the second movable mold 54 are slightly inclined toward the front and the outside of the second movable mold 54. Further, the rear surface of the second movable mold 54 is slightly inclined upward and forward in accordance with the inclination of the second molding surface 72 of the first movable mold 53.

  Now, as shown in FIG. 8, the corner portion molding portion 77 extends from the front edge portion of each first molding surface 71 toward the front and inclines toward the center portion in the left-right direction of the first movable die 53, A guide surface molding portion 81 that molds the guide surface 36 of the base portion 31, and slightly forward while curving from the front end edge (front edge) of the guide portion molding portion 81 toward the left and right central portion of the first movable mold 53. The rib rear surface molding portion 82 for molding the surface of the guide rib 32 on the third side wall portion 14 side, the front end edge of the rib rear surface molding portion 82, and extending forward, and the guide rib 32 being discharged. And a rib inner surface molding portion 83 for molding the surface of the opening 3 in the width direction center portion side.

  Further, in front of the upper portion of the rib inner surface molding portion 83, it projects laterally from the rib inner surface molding portion 83 in the left-right direction, and corresponds to the groove among the groove forming surface 32 a of the guide rib 32 and the door facing surface 35 of the base portion 31. Of the inner surface of the part 35a and the second side wall part 13, there is provided a groove forming piece 84 for forming a part facing the guide rib 32 (groove forming surface 32a). The groove forming piece 84 is configured in a tapered shape that becomes wider upward.

  Further, below the groove molding piece 84, the second movable mold is immersed in the left and right central portion of the first movable mold 53 with respect to the rib inner surface molded section 83 and the mold device 51 is assembled. A notch portion 85 is provided in contact with the inner side surface and the rear surface of the 54 guide forming portions 62. The front-rear width of the notch 85 is the same as the protruding length of the guide molding portion 62, and the distance between the pair of notches 85 formed on both sides of the first movable mold 53 is the pair of guides. This is the same as the distance between the molding parts 62. For this reason, as shown in FIG. 11, the rear surface of the base 61 of the second movable mold 54 and the second molding surface 72 of the first movable mold 53 are brought into contact with each other in the assembled state of the mold apparatus 51 ( And the notch 85 can be brought into contact with the inner and rear surfaces of the guide forming portion 62.

  Further, in the assembled state of the mold apparatus 51, the side surface of the second movable mold 54 is flush with the side surface of the groove forming piece 84 of the first movable mold 53. That is, the guide molding part 62 of the second movable die 54 protrudes laterally from the rib inner surface molding part 83 in the left-right direction. Accordingly, the opening facing surface 32b of the guide rib 32 is formed by the rear surface of the portion of the guide forming portion 62 disposed below the groove forming piece 84 and projecting laterally from the rib inner surface forming portion 83. (See FIGS. 9 and 10). In addition, the opening-corresponding portion 35 b of the door facing surface 35 of the base portion 31 is formed by the side surface of the guide forming portion 62 disposed below the groove forming piece 84. Accordingly, as shown in FIG. 9, by assembling the mold device 51, the guide rib is formed by the rib rear surface molding portion 82, the rib inner surface molding portion 83, the rear surface of the groove molding piece 84 and the rear surface of the guide molding portion 62. A cavity for molding 32 is formed.

  Further, the rear surface of the groove forming piece 84 and the front surface of the cutout portion 85 (surface facing the front) are located on the same surface. Therefore, as shown in FIG. 10, in the assembled state of the mold apparatus 51, the rear surface of the groove molding piece 84 and the rear surface of the guide molding portion 62 can be extended substantially continuously. For this reason, the situation where a big level | step difference will be made in the boundary part of the groove | channel formation surface 32a of the guide rib 32 and the opening part opposing surface 32b can be avoided. In addition, the vertical width of the guide molding portion 62 of the second movable mold 54 is the same as the vertical length of the notch portion 85. Therefore, the lower surface of the second movable die 54 and the fourth molding surface 74 of the first movable die 53 are brought into contact with each other by bringing the lower surface of the groove molding piece 84 and the upper surface of the guide molding portion 62 into contact with each other. (See FIG. 9).

  A flange 87 is formed at the upper portion of the corner forming portion 77 so that the upper edge portion of the base portion 31 and the guide rib 32 is formed one step lower than the upper side portion of the main body portion 2. Similarly to the molding surfaces 71 and 72 for molding the inner surfaces of the side wall portions 12, 13, and 14, each part of the corner portion molding portion 77 is slightly inclined toward the upper side and the outside of the first movable mold 53. ing.

  Further, as shown in FIGS. 7, 8, etc., a pair of guide molding portions of the second movable mold 54 in the assembled state of the mold device 51 in the fourth molding surface 74 of the first movable mold 53. A portion sandwiched by 62 is provided with a recessed portion forming portion 89 that protrudes downward and forms the locking recessed portion 39.

  The engagement hole 21 is formed by a movable mold that forms the outer surface of the second side wall portion 13. The fitting recess 28 for installing the discharge fitting 23 is formed by a movable mold for forming the outer surface of the third side wall portion 14.

  The mold apparatus 51 configured as described above is assembled, and the mold apparatus 51 is filled with polypropylene in a plasticized state. After solidification is completed, the mold is opened, and the molded main body 2 is molded. Remove from mold device 51. Then, the above-described main body 2 is manufactured by attaching the discharge fitting 23.

  As described above in detail, according to the present embodiment, the door member 4 is slid up and down along the guide groove 33 formed between the guide rib 32 extending in the vertical direction and the second side wall portion 13. Thus, the discharge opening 3 formed in the second side wall 13 is opened and closed. Accordingly, the structure can be simplified as compared with a configuration in which the door member 4 is provided so as to be rotatable with respect to the main body 2 and a latch mechanism or the like for restricting the operation of the door member 4 is provided. As a result, costs can be reduced and man-hours required for manufacturing can be reduced, and failures due to complicated structures are unlikely to occur.

  Further, according to the present embodiment, the groove forming surface 32 a of the guide rib 32 moves along the up-down direction that is the opening direction of the main body 2 surrounded by the first, second, and third side wall parts 12, 13, 14. The first movable mold 53 that can be formed is used. Accordingly, the groove forming surface 32a is configured as an inclined surface that is inclined upward and toward the third side wall portion 14 in order to release the first movable die 53.

  On the other hand, the opening facing surface 32b of the guide rib 32 is formed by the second movable mold 54 that can move along the thickness direction of the second side wall portion 13 (the opening direction of the discharge opening 3). Accordingly, the opening facing surface 32b can be inclined upward and toward the second side wall 13 as described above.

  Thus, by forming the opening facing surface 32b with the second movable mold 54, the length in the vertical direction of the groove forming surface 32a that must be formed by inclining upward and toward the third side wall 14 side. Thus, the difference between the width of the guide groove 33 at the upper edge of the groove forming surface 32a and the width of the guide groove 33 at the lower edge of the groove forming surface 32a can be reduced. For this reason, the clearance gap formed between the door member 4 and the guide rib 32 (guide groove 33) in the state which the both sides were inserted in the guide groove 33 and closed the discharge opening part 3 can be made as small as possible. . As a result, rattling of the door member 4 can be suppressed, and consequently problems such as lifting of the door member 4 due to the rattling can be suppressed.

  In the present embodiment, the engagement hole 21 is provided in the second side wall portion 13, and the engagement protrusion 43 that engages with the engagement hole 21 when the discharge opening 3 is closed with respect to the door member 4. Is provided. For this reason, the upward displacement of the door member 4 in the state where the discharge opening 3 is closed can be restricted. Therefore, it is possible to prevent a situation in which the door member 4 is displaced upward and the discharge opening 3 is opened unintentionally. In addition, since the engagement protrusion 43 and the engagement hole 21 are in the engaged state, the effect of suppressing the rattling of the door member 4 is more reliably achieved. Further, the engaging hole 21 is formed in the second side wall portion 13 when the main body portion 2 is formed, and the engaging protrusion 43 is integrally formed with the door member 4. For this reason, it is not necessary to attach a separately prepared member to the main body 2 or the like to prevent the door member 4 from being displaced upward, or to form the engaging hole 21 in a separate process, thereby improving the manufacturing efficiency. Can be achieved.

  Further, a locking projection 44 protruding downward is provided on the lower surface of the door member 4, and the locking projection 44 is engaged with the bottom wall portion 11 when the discharge opening 3 is closed by the door member 4. A locking recess 39 to be stopped is provided. For this reason, the shift | offset | difference movement of the lower end part of the door member 4 in the state which closed the discharge opening part 3 can be controlled. Therefore, rattling of the door member 4 can be prevented more reliably. Moreover, the situation in which the engagement state between the engagement protrusion 43 and the engagement hole 21 is released by restricting the shift movement of the lower end portion of the door member 4 can be further suppressed.

  A discharge fitting 23 as a handle is provided on the upper side portion of the third side wall portion 14 facing the second side wall portion 13. Then, the discharge metal fitting 23 and the backrest 94 of the forklift 91 are connected via a wire 97, whereby the box-shaped container 1 is tilted by the forklift 91 and the articles stored in the box-shaped container 1 are discharged. At this time, the box-type container 1 can be stably supported. Therefore, it is possible to prevent a situation in which the box-shaped container 1 is displaced when the box-shaped container 1 is tilted, and as a result, it is possible to improve workability when discharging the article. .

  In addition, in the present embodiment, the opening corresponding portion 35b extending below the guide groove 33 (groove corresponding portion 35a) in the door facing surface 35 of the base portion 31 is also formed by the second movable die 54. The opening corresponding portion 35b and the side edge of the discharge opening 3 are flush with each other. For this reason, compared with the case where there is a step between the opening corresponding portion 35b and the side edge of the discharge opening 3 (when the guide groove 33 is formed), the door in the width direction of the discharge opening 3 Shaking of the member 4 can be suppressed.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

  (A) In the above embodiment, the second side wall portion 13 is formed in a gate shape. However, for example, the second side wall portion 13 is provided only between the upper portions of the pair of first side wall portions 12, and the discharge opening portion is provided. The three side edge portions (vertical edge portions) may be configured by the first side wall portion 12. In this case, the base portion 31 may be omitted, and the guide rib 32 may be directly extended from the first side wall portion 12. However, from the viewpoint of ensuring the strength of the main body 2 (periphery of the discharge opening 3), the second side wall 13 extends to both side edges of the discharge opening 3, or the first side wall It is desirable that the side portion on the side of the discharge opening 3 of 12 is configured to be thick.

  (B) In the above embodiment, the box-shaped container 1 is made of polypropylene, but may be made of other resin materials such as polyethylene, PET, and polyamide.

  (C) Although not specifically mentioned in the above embodiment, the size of the box-shaped container 1 is not particularly limited. In the above embodiment, since the opening facing surface 32b of the guide rib 32 is formed by the second movable mold 54, for example, even in the case of the large box-shaped container 1 having a height of 300 mm or more, the guide groove The situation where the clearance gap formed between 33 and the door member 4 will become large can be avoided, and the shakiness of the door member 4 can be prevented reliably.

  (D) In the above embodiment, the handle for discharging the article from the discharge opening 3 is constituted by the discharge fitting 23, but when the main body 2 is molded, a hole is formed in the second side wall 13. It is good also as forming a handle by forming. However, in order to increase the rigidity of the handle and to configure the portion of the handle that comes into sliding contact with the upper surface of the fork when the main body 2 is tilted by a forklift or the like, the handle may be constituted by the discharge fitting 23. desirable.

  Further, the number of handles (discharge metal fittings 23) is not particularly limited. For example, the discharge metal fittings 23 may be provided only in one place. It should be noted that the discharge fitting 23 can be omitted.

  (E) In the above embodiment, the locked portion that locks the locking convex portion 44 is configured by the locking concave portion 39, but a locking hole that penetrates in the thickness direction of the bottom wall portion 11 is provided, It is good also as a structure which locks the latching convex part 44 to a latching hole. Further, when the locked portion is configured by a locking hole, the locking hole may be formed by the first movable mold 53 or by a fixed mold that molds the lower surface of the bottom wall portion 11. Also good. However, when the locked portion is configured by a locking hole, the article may be easily caught on the locked portion or may fall from the locking hole when the article is discharged. The locked portion is preferably constituted by a locking recess 39. The locking recess 39 and the locking projection 44 can be omitted. Further, the engagement hole 21 and the engagement protrusion 43 can be omitted.

  (F) In the above embodiment, a caster may be provided on the lower surface of the bottom wall portion 11. Moreover, you may abbreviate | omit the slits 17 and 42 for drainage formed in the bottom wall part 11, the side wall parts 12 and 14, and the door member 4. FIG. Furthermore, in the said embodiment, although the door member 4 is comprised so that attachment or detachment is possible with respect to the main-body part 2, you may comprise so that it cannot remove.

  (G) In the above embodiment, the main body 2 is molded so that the bottom wall 11 of the main body 2 is positioned on the lower side. However, the present invention is not particularly limited to such a configuration. The main body 2 may be formed such that the first side wall 12 is positioned on the lower side.

It is a perspective view of a box-type container. It is a perspective view of a box-type container. It is a model perspective view which shows the structure inside a box-shaped container. It is a fragmentary sectional view which shows the box-shaped container in which the discharge opening part is in a closed state. It is a fragmentary sectional view which shows the box-shaped container in which the discharge opening part is in a closed state. It is a schematic side view which shows a box-shaped container etc. at the time of article discharge. It is a fragmentary perspective view which shows a metal mold | die apparatus and a main-body part. It is a perspective view which shows a 1st movable mold | type and a 2nd movable mold | type. It is a perspective view which shows a 1st movable mold | type and a 2nd movable mold | type. It is sectional drawing which shows a metal mold apparatus and a main-body part. It is sectional drawing which shows a metal mold apparatus and a main-body part.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Box-shaped container, 2 ... Main-body part, 3 ... Discharge opening part, 4 ... Door member, 11 ... Bottom wall part, 12 ... 1st side wall part, 13 ... 2nd side wall part, 14 ... 3rd side wall part, DESCRIPTION OF SYMBOLS 21 ... Engagement hole, 23 ... Ejection metal fitting, 28 ... Fitting recessed part, 31 ... Base part, 32 ... Guide rib, 32a ... Groove formation surface, 32b ... Opening opposing surface, 33 ... Guide groove, 39 ... Locking recessed part , 43 ... engaging protrusion, 44 ... locking projection, 51 ... mold device, 53 ... first movable mold, 54 ... second movable mold.

Claims (4)

A substantially rectangular bottom wall portion, a pair of first side wall portions extending upward from opposite side portions of the bottom wall portion, and one side portion of the pair of first side wall portions are connected to each other. 2 side walls, and a third side wall for connecting the other side of the pair of first side walls, and each wall is integrally formed by molding to form a box shape that opens upward. A body portion having a discharge opening formed at the lower portion of the second side wall portion and capable of discharging an article housed inside from the side to the outside;
In a box-shaped container comprising a door member capable of opening and closing the discharge opening,
A pair of first groove portions that project from the pair of first side wall portions to the inside of the main body portion and extend in the vertical direction, and that form guide grooves that can be inserted through the side portions of the door member between the second side wall portions. With guide ribs,
Each guide rib is opposed to the inner side surface of the second side wall portion above the discharge opening, and forms a guide groove having a substantially U-shaped cross section with the inner side surface of the second side wall portion; An opening facing surface connected to the lower side of the groove forming surface and facing the discharge opening;
The groove forming surface is formed by a first movable mold movable along the opening direction of the main body portion surrounded by the first, second, and third side wall portions,
A box shape characterized in that the opening facing surface is movable along the thickness direction of the second side wall and is formed by a second movable mold for forming the discharge opening. container. A regulating means for regulating upward displacement of the door member in a state in which the discharge opening is closed;
The regulating means is
When forming the main body, an engagement hole formed in the second side wall above the discharge opening;
2. The box shape according to claim 1, further comprising an engagement protrusion that is integrally formed with the door member and engages with the engagement hole in a closed state of the discharge opening by the door member. container. The lower surface of the door member is provided with a locking projection that projects downward,
The locked portion to which the locking projection is locked in the closed state of the discharge opening by the door member is provided on the bottom wall portion. The box-shaped container as described.   The box-shaped container according to any one of claims 1 to 3, wherein a handle is provided on an upper portion of the third side wall portion facing the second side wall portion.

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