JP2007118991A - Container and manufacturing method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container capable of easily improving productivity with a simple constitution. <P>SOLUTION: The container 2 is equipped with a container body 5 wherein an upper part opening of a cylindrical body part 7 is closed by a top plate 6 partially having openings 11, 12, an upper lid 10 having opening/closing pieces 23, 24 opening/closing the openings 11, 12 of the top plate 6, and a bottom lid 15 closing the lower part opening of the container body 5. The cylindrical body part 7 and the top plate 6 are integrally formed by injection molding. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present application relates to a synthetic resin container or the like in which an upper lid is assembled to an upper end opening of a cylindrical main body and a lower end opening of the main body is closed with a bottom lid.

  This type of container is applied, for example, as a shakeout container for granular materials such as powdered cheese. As this type of container, for example, a cylindrical container body having openings at both ends, an opening at the top, and an open / close lid for opening and closing the opening are integrally formed via a hinge, and the top of the container body There is known a container configured to include an upper lid that is detachably attached to a bottom lid and a bottom lid that closes a lower opening of the container body (see Patent Document 1).

  Such a container can be filled with powdered cheese and other powdered products at the bottom, and the assembly of the bottom cover to the main body can be achieved by plugging to improve the filling work efficiency and the assembly work efficiency. It is common. Further, by filling the powdery material by the bottom filling method in this manner, it is possible to provide a peelable inner seal in consideration of virginity and moisture resistance at the upper end opening of the container body.

Japanese Patent No. 3303231

  The conventional container described above is formed by injection molding. In particular, when the container body 50 is formed, it has a shape having openings at both ends. In addition, it is necessary to provide gates 51 for injecting resin on the left and right sides of the portion of the container body 50 that will be the body portion 50a.

  Therefore, when the container body 50 is formed by injection molding, as shown in FIG. 5, after the injection molding, the molded product is taken out with the gate 51 remaining inside the container body 50, and thereafter, one point in the figure. As indicated by the chain line, it was necessary to cut the gate 51 (unnecessary portion).

  Needless to say, in order to improve productivity, it is necessary to reduce the manufacturing cost and simplify the manufacturing process when manufacturing the container.

  Therefore, an object of the present application is to provide a container or the like that has a simple configuration and can easily improve productivity.

  In order to solve the above-mentioned problem, a container (2) according to claim 1 is a container formed by closing an upper opening of a cylindrical body (7) with a top plate (6) having openings (11, 12) in part. A main body (5), an upper lid (10) having opening and closing pieces (23, 24) for opening and closing the opening of the top plate, and a bottom lid (15) for closing the lower opening of the container body, The cylindrical body and the top plate are integrally formed by injection molding.

  The container according to claim 2 is the container according to claim 1, characterized in that the top plate is formed to be recessed in a substantially dome shape inside the container main body.

  Further, the container according to claim 3 is the container according to claim 2, wherein a peelable impermeable seal (50) considering virginity and moisture resistance is attached to the upper peripheral edge of the top plate. It is characterized by being.

  A container according to claim 4 is the container according to any one of claims 1 to 3, wherein the opening has openings (11, 12) having different opening diameters in front and rear of the top plate. It is characterized by.

  The container according to claim 5 is the container according to any one of claims 1 to 4, wherein the injection molding is performed by in-mold molding, and a label (34) is integrally formed on the cylindrical body. It is characterized by being.

  A container manufacturing method according to claim 6 includes a container body forming step of integrally forming a container body formed by closing one end of a cylindrical body portion with a top plate having an opening by injection molding, and the top plate A seal sticking step for sticking an impermeable seal, a content filling step for filling the contents from the other end of the container body, and a bottom lid attaching step for attaching a bottom lid to the other end of the container body; And an upper lid attaching step of attaching an upper lid to one end of the container body.

  According to the inventions according to claims 1 and 6, the cylindrical body 7 and the top plate 10 forming the container body 5 are integrally formed by injection molding, so that the gate when the container body is injection molded As long as there is only one on the upper end surface on the cavity side, there is no need to branch the gate to the left and right of the body part of the container body as in the prior art, and it is necessary to cut the remaining gate after injection molding Therefore, the manufacturing process can be reduced, and the productivity can be improved and the manufacturing cost can be reduced. Further, according to the invention according to claim 1, when the container body is formed by injection molding, an opening for swinging out the contents together with the top plate is formed. Since there is no need to provide an opening to adjust the amount of content flow out, the top lid can also be easily manufactured, reducing the number of manufacturing steps compared to conventional methods, improving productivity, and reducing manufacturing costs. Can be planned.

  Moreover, according to the invention which concerns on Claim 2, the intensity | strength of a container main body can be raised simply and easily.

  Further, according to the invention of claim 3, since the top plate is integrally formed on the upper portion of the cylindrical body portion, compared with the conventional case, there are more portions to which the impermeable seal is attached, It is easy to stick a permeable seal and the assemblability can be improved.

  Furthermore, according to the invention which concerns on Claim 4, the user can select and use either among the opening parts from which an opening diameter differs according to the amount of protrusion.

  Furthermore, according to the invention which concerns on Claim 5, when forming a container main body, a label can also be integrally formed in the surrounding surface of the cylindrical trunk | drum of a container main body simultaneously.

  The best mode for carrying out the invention will be described below with reference to the drawings. In the following description, the upper and lower sides of the container in FIG. 1 will be described as the vertical direction of the container, and the left and right sides of the container in FIG. 2 will be described as the front and rear direction of the container.

  This application is applied to the container 2 which accommodates granular materials, such as baked cheese. The container 2 is used by tilting the container body 5 and swinging out the granular material from the upper opening. As shown in FIG. 1, the container 2 includes a cylindrical container body 5, an upper lid 10 attached to the upper end portion thereof, and a bottom lid 15 attached to the lower end portion thereof.

  The container main body 5 includes a top plate 6 that is recessed in a substantially dome shape into the container at an upper portion thereof, and a cylindrical body 7 that extends downward from the periphery of the top plate 6. The top plate 6 and the body 7 are integrally formed by injection molding. In addition, since an advertising label 34 on which the name, components, and the like are written is attached to the outer peripheral surface of the container body 5, injection molding is performed by in-mold molding. In addition, the trunk | drum 7 of this embodiment functions as a cylindrical trunk | drum of this application.

  Moreover, in order that the trunk | drum 7 may achieve the sticking of the label 34 with respect to the outer peripheral surface of the said trunk | drum 7 smoothly, it is the taper surface 7a diameter-reduced upwards, The difference in the outer diameter with the part is as small as about 1 mm, and the external appearance is almost the same.

  As shown to Fig.2 (a), it has the 1st and 2nd opening parts 11 and 12 with which the opening diameters which connect the inside and the exterior of the container main body 5 differ in the front and back of the top plate 10. As shown in FIG. . The first opening 11 has three substantially triangular openings 11 a formed in parallel along the periphery of the top plate 10 in front of the top plate 10, and the second opening 12 is the rear center of the top plate 10. A substantially circular opening 12a is formed in the part.

  As shown in FIG. 3, an injection molding die 30 for forming the container body 5 is divided into a core 31 side and a cavity 32 side, and a molding resin that becomes the container body 5 in a space 33 therebetween. Is press-fitted from the gate 35. Further, a label 34 provided on the outer periphery of the barrel 7 of the container body 5 is sucked into the space 33 by being brought into contact with the inner surface of the cavity 32 as indicated by an arrow in the drawing, and a molding resin (synthetic resin) is injected. Formed by. A gate 35 for injection and injection is provided on the cavity 32 side, and the container body 5 is formed by injecting molding resin from the gate 35. Further, a convex portion 32a is provided at a predetermined position on the cavity 32 side, and the first and second openings 11 and 12 provided in the top plate 6 are formed by the convex portion 32a. .

  If it does in this way, the container main body 5 which block | closes the upper part opening of the trunk | drum 7 with the top plate 6 which has the opening parts 11 and 12 in part by injection molding can be manufactured easily. According to this embodiment, it is not necessary to cut the gate after molding the container body 5 as in the prior art, and an opening for controlling the outflow amount of the granular material accommodated in the container body 5 in the upper lid 10 or the like. Since the manufacturing process can be reduced when manufacturing the container 2, such as the necessity of providing the container 2 can be reduced, the manufacturing time can be shortened and the burden on the operator can be reduced, thereby improving productivity and reducing manufacturing costs. It becomes possible to plan.

  In addition, the base portion on the cavity 32 side of the convex portion 32a in the mold 30 is preferably formed to be curved as shown in FIG. In this way, the cuts of the openings 11 and 12 formed on the upper end surface of the top plate 10 have a curved shape, and the danger that the user accidentally cuts the finger can be prevented.

  Further, tapered surfaces are formed on both sides so that the diameter on the core 31 side is larger than the cavity 32 side. This taper is negligible and is almost indistinguishable. If it does in this way, when removing a molded article after injection molding, it becomes possible to take out a molded article easily from a metallic mold.

  Further, as shown in FIG. 2B, the upper end portion of the body portion 7 has a mouth tube portion 8 to which the upper lid 10 is attached, and a first screw thread is formed on the outer peripheral surface of the mouth tube portion 8. 8a is formed. As shown in FIG. 4, an annular recess 9 for fitting with the bottom lid 15 is formed on the lower inner peripheral surface of the body portion 7.

  Next, as shown in FIG. 2B, the upper lid 10 includes a circular upper end body 21 and a cylindrical side wall 22 that extends downward from the periphery of the upper end body 21. The upper end body 21 and the side wall 22 are integrally formed by injection molding or the like. On the inner peripheral surface of the side wall 22, a second screw 22a that is screwed into the first screw 8a is formed.

  In addition, as shown in FIG. 2, on the front side and the rear side of the upper end body 21, a substantially semicircular shape that opens and closes the first and second openings 11 and 12 provided in the top plate 6 of the container body 5. The first and second opening / closing pieces 23 and 24 are integrally formed with the upper end portion 21 as a part of the upper end portion 21 via hinges 25 and 26. The open / close pieces 23, 24 are formed by bending the outer peripheral end so as to cover a part of the upper portion of the side wall 22, and have a protruding piece 27 with a part of the end protruding in the front-rear direction. is doing. An annular engagement piece 28 is formed on the inner peripheral surfaces of the opening pieces 23, 24, and the engagement piece 28 engages with a protruding member 29 provided on a part of the outer peripheral surface of the side wall 22. It is like that. When the granular body accommodated in the container body 5 is tilted to the outside, the protruding piece 27 is lifted upward to engage the engaging piece 28 with the protruding member 29. , The opening pieces 23 and 24 are lifted upward via the hinges 25 and 26 and the opening pieces 23 and 24 are raised to open the openings 11 and 12 to the outside. On the other hand, by lowering the projecting piece 27 downward, engaging the engagement piece 28 of the opening pieces 23, 24 with the projecting member 29, and closing the openings 11, 12 by the opening pieces 23, 24, It is possible to hold the state where the openings 11 and 12 are closed.

  Next, as shown in FIG. 4, the bottom cover 15 includes a circular bottom body 41, a cylindrical inner cylinder 42 erected on the periphery of the bottom body 41, and a lower end portion of the inner cylinder 42. A cylindrical outer cylinder 43 that is inverted outward from the peripheral edge of the lower end of the trunk portion 7 and rises upward. The bottom body 41, the inner cylinder body 42, and the outer cylinder body 43. Are integrally formed by injection molding or the like.

  Further, the outer peripheral surface of the inner cylindrical body 42 is formed with an annular convex portion 42a projecting in the outer peripheral direction, and when the convex portion 42a is attached to the lower end portion of the container body 5, It engages with a groove 9 formed in the body portion 7 of the container body 5. In addition, the lower end portion of the body portion 7 of the container body 5 is sandwiched between the inner cylinder body 42 and the outer cylinder body 43 and is attached by caulking to join the container body 5 and the bottom lid 15 together.

  Moreover, as shown in FIG.2 (b), the impervious seal | sticker 50 is attached to the upper end part of the top plate 6 over the outer periphery. The seal 50 is made of a peelable material considering virginity and moisture resistance. Thereby, inflow of the air before a use start can be interrupted | blocked, unauthorized opening can be prevented, and also moisture resistance can be considered.

  Next, the manufacturing method of the container of this embodiment is demonstrated.

  In the container 2 of the present embodiment, first, a container body 5 is integrally formed by closing the upper portion of the cylindrical body 7 with the top plate 10 having the first and second openings 11 and 12 by injection molding. Next, an impervious seal 50 is attached to the peripheral edge of the top plate 10 so as to close the first and second openings 11 and 12, and then a granular material or the like accommodated inside the container body 5. The contents are manufactured by filling the contents from the lower end opening of the container body 5, attaching the bottom lid 15 to the lower end portion of the container body 5, and finally attaching the upper lid 10 to the upper end portion of the container body 5. Further, the injection molding is manufactured by in-mold molding in which the label 34 is integrally formed on the peripheral surface of the cylindrical body portion 7.

  In the container 2 manufactured in this way, the cylindrical body 7 and the top plate 10 that form the container body 5 are integrally formed by injection molding, so the gate when the container body 5 is injection molded is Since there is only one on the upper end surface on the cavity side, there is no need to branch the gate to the left and right of the body portion of the container body as in the prior art, and it is also necessary to cut the remaining gate after injection molding Therefore, manufacturing steps can be reduced, and productivity can be improved and manufacturing costs can be reduced. In addition, since the container body 5 has an opening, it is not necessary to provide an opening or the like for controlling the outflow amount of the granular material accommodated in the container body 5 in the upper lid 10. Since the number of steps can be reduced, the manufacturing time can be shortened and the burden on the operator can be reduced, so that it is possible to improve productivity and reduce manufacturing costs.

  In addition, this application is not limited to the said embodiment, It can implement with a various form. For example, you may make it provide the opening part for swinging out the content formed in the top plate 6 only in either one of the front-back direction. Moreover, the top lid 10 and the bottom lid 15 do not necessarily need to be made of a synthetic resin, but are preferably made of an impermeable material.

It is the whole structure figure showing the partial standing section structure of the container of this application. The structure of the container upper part of this application is shown, Fig.2 (a) is a top view of an upper cover, FIG.2 (b) is a cross-sectional enlarged view of the container upper part of FIG. It is a figure explaining the example of injection molding of the container of this application. FIG. 2 is an enlarged view of part A of FIG. 1. It is a figure explaining the injection molding example of the conventional container, Fig.5 (a) is a figure which shows the injection molding example, FIG.5 (b) is a figure which shows the shape | molded container.

Explanation of symbols

2 Container 5 Container body 6 Top plate 7 Body 10 Upper lid 11, 12 Opening portion 15 Bottom lid 23, 24 Opening / closing piece 34 Label 50 Impervious seal

Claims (6)

A container body formed by closing the upper opening of the cylindrical body with a top plate having an opening in part;
An upper lid having an opening and closing piece for opening and closing the opening of the top plate;
A bottom lid for closing the lower opening of the container body;
Comprising
The said cylindrical trunk | drum and a top plate are integrally formed by injection molding, The container characterized by the above-mentioned.   The container according to claim 1, wherein the top plate is formed to be recessed in a substantially dome shape inside the container body.   The container according to claim 2, wherein a peelable and impermeable seal in consideration of virginity and moisture resistance is attached to an upper peripheral edge of the top plate.   The container according to any one of claims 1 to 3, wherein the opening has openings having different opening diameters in front and rear of the top plate.   The container according to any one of claims 1 to 4, wherein a label is integrally formed on the cylindrical body portion by in-mold molding in the injection molding. A container body forming step of integrally forming a container body formed by closing one end of a cylindrical body portion by injection molding with a top plate having an opening;
A sticking step for sticking an impermeable seal to the top plate;
A content filling step of filling the contents from the other end of the container body;
A bottom lid attaching step of attaching a bottom lid to the other end of the container body;
An upper lid attaching step of attaching an upper lid to one end of the container body;
The manufacturing method of the container characterized by comprising.

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