JP4791256B2 - Double container - Google Patents

Description

The present invention relates to a double container .

As a double container of this type, for example, as shown in Patent Document 1 below, a ring portion protrudes from the outer peripheral surface of the extraction cylindrical portion. A container with a pouring cylinder in which the inner peripheral surface of the upper end opening of the container is joined to the outer peripheral surface of the welded portion located below the center axis direction of the pouring cylindrical portion, and the container with the pouring cylinder are housed inside A configuration is known that includes an outer container and a pump that is provided at an upper end opening of the extraction cylindrical portion and that extracts the contents of the container. And when a consumer uses up the content, it replaces | exchanges for the container with a new extraction cylinder with which the content was filled, and an exterior container and a pump are reused.
The container with the pouring cylinder configured as described above has, for example, an upper end opening having an inner peripheral surface shape along the outer peripheral surface of the welded portion, by rounding the cut film, joining the side end portions thereof, and the like. After forming the container, a welding portion is inserted into the upper end opening of the container, and then a pair of pressing members having an inner peripheral surface along the outer peripheral surface of the welding portion and divided into two equal parts in the circumferential direction are provided. It is formed by pressing toward the outer peripheral surface of the welded portion, and joining the upper end opening of the container and the outer peripheral surface of the welded portion.
Japanese Patent Laid-Open No. 2004-3007048

  However, in the conventional container with a pouring cylinder, at the time of joining, the upper end opening of the container is directed toward the outer peripheral surface of the welded portion with sufficient force at each peripheral end portion of the inner peripheral surface of the pair of pressing members. It could not be pressed, and the upper end opening of the container and the outer peripheral surface of the welded part could not be joined with sufficient strength over the entire circumference in a single joining step. Therefore, after the first joining, by changing the circumferential position of the upper end opening of the container and the extraction cylindrical part with respect to the pressing member, the circumference of the pressing member at the first joining in the upper end opening of the container is changed. It is necessary to press and join the portion pressed at the end portion again at the portion of the inner peripheral surface of the pressing member excluding the peripheral end portion, and it is difficult to reduce the cost because the manufacturing time becomes long. There was a problem.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a double container that can reduce the manufacturing cost.

In order to solve the above problems and achieve such an object, the double container of the present invention has a ring portion projecting from the outer peripheral surface of the extraction cylindrical portion, and among the extraction cylindrical portion, A container with a dispensing cylinder in which the inner circumferential surface of the upper end opening of the container is joined to the outer circumferential surface of the welded portion located below the ring portion in the central axis direction of the dispensing cylindrical portion, and the dispensing cylinder A double container provided with an outer container in which the attached container is internally provided and a pump for pouring out the contents of the container provided at an upper end opening of the extraction cylindrical part, on the outer peripheral surface of the welding part Are formed with welding projections that protrude smaller in the radial direction than the ring portion at positions facing each other across the central axis in the radial direction. The apex is located in a triangular shape at the outer end in the direction, and the apex and the The rising surface connecting the outer peripheral surface of the attaching portion is a flat surface or a convex curved surface, and the inner peripheral surface of the upper end opening of the container is joined to the welding convex portion and the welding portion over the entire circumference. .
In this invention, since the welding convex part is formed in the welding part, after inserting the welding part into the upper end opening of the container, it has an inner peripheral surface along the outer peripheral surface of the welding part, and in the circumferential direction. When the pair of pressing members divided into two equal parts are pressed toward the outer peripheral surface of the welded portion, and the upper end opening of the container and the outer peripheral surface of the welded portion are joined, Both peripheral ends can be pressed against the rising surface of the welding convex portion through the container, and the container can be pressed with sufficient force toward the rising surface by these peripheral ends. . Therefore, it is possible to join the inner peripheral surface of the upper end opening of the container to the outer peripheral surface of the welded portion and the welded convex portion with sufficient strength only through a single joining step. The manufacturing cost can be reduced by shortening the manufacturing time of the container. Thereby, while the inner peripheral surface of the upper-end opening part of a container is joined to a welding part and a welding convex part over a perimeter with sufficient intensity | strength, the double container with reduced manufacturing cost is obtained.
Furthermore, since the welding convex portion is smaller than the ring portion and protrudes radially outward, the outer circumferential surface of the upper end opening of the container in the container with the pouring cylinder is the outer circumference of the welding portion by forming this welding convex portion. It is possible to prevent the appearance of the container from deteriorating due to the fact that the height protruding from the surface is large, and further, the height protrudes outward from the ring portion.

Here, each welding convex part may be symmetrical with respect to the central axis.
In this case, the positioning for determining the circumferential position of the extraction cylindrical portion with respect to the pair of pressing members before joining is facilitated, and the manufacturing time of the container with the extraction cylinder can be further shortened.

In addition, the tops of the two welding projections are respectively arranged at positions facing each other across the central axis in the radial direction, and these welding projections are virtual straight lines that connect the tops to each other in the radial direction of the welding portion. It may be symmetrical with respect to.
In this case, it becomes possible to simplify the shape of the extraction cylindrical part, and to reduce the manufacturing cost of the container with the extraction cylinder.

According to the double container according to the present invention, the manufacturing cost can be reduced.

  Embodiments of the present invention will be described below with reference to the drawings. In the double container 10 according to this embodiment, a ring portion 22 protrudes from the outer peripheral surface of the extraction cylindrical portion 21, and the extraction cylindrical portion 21 of the extraction cylindrical portion 21 is more than the ring portion 22. A container 20 with a pouring cylinder in which the inner peripheral surface of the upper end opening of the container 24 is welded or bonded to the outer peripheral surface of the welding part 23 located below the central axis O, and the container with the pouring cylinder The exterior container 11 in which 20 is housed, and the pump 12 that is provided in the upper end opening 21 a of the extraction cylindrical portion 21 and that extracts the contents of the container 24 are provided.

  Note that the top opening of the pouring cylindrical portion 21 and the container 24 has a ring shape in cross section and is arranged coaxially. The top opening of the pouring cylindrical portion 21 and the container 24 The central axis O is positioned at each radial center. In addition, a male screw portion 26 to which the pump 12 is screwed is formed in an upper end opening portion 21 a located above the ring portion 22 in the central axis O direction on the outer peripheral surface of the extraction cylindrical portion 21. Furthermore, in this embodiment, the container 24 is formed by cutting a single-layer film made of an aluminum film, a synthetic resin film, or a laminated film having at least one of these films, and a welding portion 23. It is formed by rounding so as to have an upper end opening having an inner peripheral surface shape along the outer peripheral surface, and joining the side end portions and the bottom portion forming portions respectively.

  As described above, the content in the container 24 is poured out from the nozzle 12b of the pump 12 by pressing the head portion 12a of the pump 12 downward in the direction of the central axis O. Further, when the contents of the container 24 are used up by the consumer, the outer container 11 and the pump 12 are reused by exchanging with a new container 20 with a dispensing cylinder filled with the contents. In addition, the contents in the container 24 of the container 20 with the extraction cylinder are filled with the ring portion 22 being held.

  And in this embodiment, the welding convex part 25 which protruded radially outward smaller than the ring part 22 in the position which mutually opposes the said center axis line O in the radial direction on the outer peripheral surface of the welding part 23, respectively. The welding projection 25 has a triangular shape in which a top portion (hereinafter referred to as a “projection top”) 25a is located at the radially outer end, and the projection top 25a and the weld portion. A rising surface 25b that connects the outer peripheral surface of 23 is a flat surface or a convex curved surface. In the illustrated example, the welding convex portion 25 has substantially the same cross-sectional view shape over the entire length of the welding portion 23 in the central axis O direction. Moreover, in the cross sectional view of the welding convex part 25, the shape from the protrusion top part 25a to the outer peripheral surface of the welding part 23 through one rising surface 25b is the shape of each inner peripheral surface of a pair of pressing members described later. In a cross-sectional view, the shape is in line with the shape of the peripheral end.

  Further, each of the pair of both welding convex portions 25 is symmetric with respect to the central axis O. Further, the protruding top portions 25a of the two welding convex portions 25 are respectively arranged at positions facing each other with the central axis O sandwiched in the radial direction, and these welding convex portions 25 are connected to the protruding top portions 25a of the welding portion 23. It is symmetrical with respect to an imaginary straight line L1 connected in the radial direction.

  For example, the outer diameter of the welded portion 23 is about 18.8 mm, and when the rising surface 25b is the convex curved surface, the radius of curvature is about 20 mm, and the radius of curvature of the protruding top portion 25a is about 0.5 mm. The In addition, the two welding projections 25 are each formed within an angle range of 45 ° around the central axis O on the outer peripheral surface of the welding part 23. Furthermore, the outer diameter of the upper end opening 21 a of the dispensing cylindrical portion 21, that is, the valley diameter of the male screw portion 26 is made smaller than the outer diameter of the protruding top portion 25 a of the welding convex portion 25.

Next, the manufacturing method of the container 20 with a pouring cylinder is demonstrated.
First, the cut film is rounded so as to have an upper end opening having an inner peripheral surface shape along the outer peripheral surface of the welded portion 23, and the side end portions are bonded to each other, and then the bottom forming portion is bonded to the container. 24 is formed. Next, the welding portion 23 is inserted into the upper end opening of the container 24, and then a pair of pressing members having an inner peripheral surface along the outer peripheral surface of the welding portion 23 and divided into two equal parts in the circumferential direction are provided. When the upper end opening of the container 24 and the outer peripheral surface of the welded portion 23 are joined to each other by pressing toward the outer peripheral surface of the welded portion 23, both peripheral end portions of the inner peripheral surfaces of the pair of pressing members are The container 20 with the pouring cylinder in which the inner peripheral surface of the upper end opening of the container 24 is joined to the welded portion 23 and the welded convex portion 25 over the entire circumference by pressing against the rising surface 25b of the welded convex portion 25 through 24. Form.

As described above, according to the container 20 with the extraction cylinder according to the present embodiment, since the welding convex portion 25 is formed in the welding portion 23, the welding portion 23 is inserted into the upper end opening of the container 24, When joining the upper end opening of the container 24 and the welded portion 23, the both peripheral end portions of the inner peripheral surfaces of the pair of pressing members are pushed onto the rising surface 25 b of the welded convex portion 25 via the container 24. The container 24 can be pressed with a sufficient force toward the rising surface 25b by these peripheral end portions. Therefore, it is possible to join the inner peripheral surface of the upper end opening of the container 24 to the outer peripheral surface of the welded portion 23 and the welded convex portion 25 with sufficient strength only through a single joining step. The manufacturing time of the container 20 with a protruding cylinder can be shortened and the cost can be reduced.
Furthermore, since the welding convex portion 25 is smaller than the ring portion 22 and protrudes radially outward, the outer peripheral surface of the upper end opening of the container 24 in the container 20 with the pouring cylinder is formed by forming the welding convex portion 25. It is possible to suppress the height at which the protrusion protrudes from the outer peripheral surface of the welded portion 23 and the appearance of the container 24 from being deteriorated.

Moreover, in this embodiment, since both the welding convex parts 25 are respectively symmetrical with respect to the said center axis line O, the circumferential direction position of the extraction cylindrical part 21 with respect to a pair of press member is determined before joining. Positioning becomes easy and the manufacturing time of the container 20 with the extraction cylinder can be further shortened.
Furthermore, in this embodiment, since each welding convex part 25 is made into the symmetrical shape with respect to the said virtual straight line L1, it becomes possible to simplify the shape of the extraction cylindrical part 21, and to pour out. The manufacturing cost of the cylindrical container 20 can be reduced.
And in the double container 10 which has the container 20 with the above extraction cylinders, the inner peripheral surface of the upper end opening part of the container 24 is joined to the welding part 23 and the welding convex part 25 with sufficient intensity | strength over the perimeter. At the same time, the cost can be reduced.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
In the embodiment, the male screw portion 26 is formed on the outer peripheral surface of the extraction cylindrical portion 21, but the male screw portion 26 may not be formed.
Moreover, in the said embodiment, although the outer diameter of the upper end opening part 21a of the extraction cylindrical part 21, ie, the valley diameter of the external thread part 26, was made smaller than the outer diameter of the protrusion top part 25a of the welding convex part 25, it replaces with this. For example, these outer diameters may be made equal.
Further, in the above-described embodiment, the projecting top portions 25a of the two welding convex portions 25 are disposed at positions facing each other with the central axis O sandwiched in the radial direction. However, the both projecting top portions 25a do not have to face each other. Good.

  Moreover, in the said embodiment, although each welding convex part 25 was made into the shape symmetrical with respect to the said virtual straight line L1, it may replace with this and may become an asymmetrical shape, In this case, these welding convex parts 25 is preferably symmetric with respect to the central axis O. That is, for example, in the right welding convex portion 25 shown in FIG. 3, the upper rising surface 25b is a flat surface and the lower rising surface 25b is a convex curved surface, while the left welding convex portion 25 has an upper rising surface. 25b can be a convex curved surface, and the lower rising surface 25b can be a flat surface. In this case, as in the above-described embodiment, alignment for determining the circumferential position of the extraction cylindrical portion 21 with respect to the pair of pressing members before joining is facilitated.

Furthermore, in the said embodiment, what cut | disconnected the said film as the container 24 is rolled so that it may have the upper end opening part of the internal peripheral surface shape along the outer peripheral surface of the welding part 23, and the side edge parts are joined. However, instead of this, for example, a container having an upper end opening having an inner peripheral surface shape along the outer peripheral surface of the welded portion 23 may be formed by extrusion molding or the like.
Moreover, in the container 24, the structure of the part located in the center axis line O direction rather than the said upper end opening part joined to the welding part 23 may be changed suitably instead of what is shown by FIG. Further, the upper end opening of the container 24 and the welded portion 23 of the dispensing cylindrical portion 21 may be welded or fused to each of these portions by applying heat, ultrasonic waves, or the like, or Instead of this, an adhesive may be interposed between these parts to bond them.

The manufacturing cost of the double container can be reduced.

It is the perspective view which decomposed | disassembled the double container shown as one Embodiment which concerns on this invention. It is a longitudinal cross-sectional view of the extraction cylindrical part shown in FIG. It is a bottom view of the extraction cylindrical part shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Double container 11 Exterior container 12 Pump 20 Container with pouring cylinder 21 Pouring cylinder part 22 Ring part 23 Welding part 24 Container 25 Welding convex part 25a Projection top part (top part)
25b Rising surface L1 Virtual straight line O Center axis

Claims (3)

A ring portion projects from the outer peripheral surface of the extraction cylindrical portion, and of the extraction cylindrical portion, the outer peripheral surface of the welding portion is located below the ring portion in the central axis direction of the extraction cylindrical portion. A container with a pouring cylinder to which the inner peripheral surface of the upper end opening of the container is joined, an exterior container in which the container with the pouring cylinder is installed, and an upper end opening of the pouring cylinder. A double container comprising a pump for dispensing the contents of
On the outer peripheral surface of the welded portion, weld convex portions that are smaller than the ring portion and project outward in the radial direction are formed at positions facing each other across the central axis in the radial direction. The cross-sectional view has a triangular shape with the apex located at the radially outer end thereof, and the rising surface connecting the apex and the outer peripheral surface of the welded portion is a flat or convex curved surface, and the upper end of the container The double container, wherein an inner peripheral surface of the opening is joined to the welding convex portion and the welding portion over the entire circumference. The double container according to claim 1,
Each double weld protrusion, the double container, characterized in that it is symmetrical with respect to the central axis. The double container according to claim 1 or 2,
The tops of both welding projections are arranged at positions facing each other across the central axis in the radial direction, and these welding projections are relative to a virtual straight line connecting the tops to each other in the radial direction of the welding portion. Double container characterized by being symmetrical.

Images