JPS6160439A - Vessel and manufacture thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Field of Industrial Application) The great invention relates to a container and a method for manufacturing the same, and more specifically, the invention relates to a container made of metal and a plastic container having a threaded portion formed on the outer periphery of the mouth and neck of the container body. The present invention relates to a container in which a cylindrical body is unrotatably inserted, and a method for manufacturing the same.

(Prior Art) A container is known in which a plastic cylindrical body having a threaded portion on the outer periphery for screwing a cap is inserted into a relatively narrow mouth and neck portion of a container body made of gold FA.

When inserting such a plastic cylindrical body, it is difficult to form a thread with high precision in the mouth and neck if the thread is formed directly on the mouth and neck, or the mouth and neck are relatively thin. In this case, the rigidity is insufficient, and when engaging the roll-on cap, it is not possible to fully form a satisfactory thread on the cap, resulting in a poor seal. This is because there is a risk that this may occur.

A problem with containers having such a cylindrical body inserted outside the container is that when the cap is removed, the cylindrical body rotates with the cap, making removal difficult. Furthermore, since the cylindrical body is made of plastic, its upper end surface is easily damaged during handling prior to pinning, and the sealing performance is therefore likely to be impaired.

As a countermeasure for this, Japanese Utility Model Publication No. 57-34114 discloses that a large number of thin vertical protrusions are formed on the circumferential end surface from the upper end to the upper end of the outer circumferential surface of the cylindrical body, and in order to hold the circumferential end surface at full force by 7 meters,
A container is disclosed in which a large number of vertical wrinkles that occur in a caulked part formed by curving the upper end of the mouth and neck outward are engaged with a vertical protrusion to prevent rotation of the cylindrical body. .

(Problems to be Solved by the Invention) In the case of the above-mentioned conventional container, since the position where the vertical wrinkles occur is unspecified, the attachment with the vertical protrusions is unstable and the attachment is not sufficiently performed. In that case, it is easy to rotate. In addition, in an attempt to improve the effect of preventing rotation, if the height of the vertical ridges or vertical wrinkles is made high, the sealing performance is likely to be impaired, whereas if the above-mentioned height is lowered in an attempt to prevent the deterioration of the sealability, the problem is that it is easy to rotate. will occur.

Furthermore, if the shoulder and body wall of the container are relatively thin,
There is a problem in that the shoulder portion and/or the body wall portion are susceptible to buckling due to the axial load applied during plugging.

(Object of the Invention) The present invention provides a container in which a cylindrical body made of plastic with a threaded portion formed on the outer periphery is inserted into the mouth and neck of a metal container body, and the sealing performance is improved. The object of the present invention is to provide a container in which a cylindrical body cannot rotate.

The present invention is a gelastec in which a threaded portion is formed on the outer periphery of the mouth and neck of the metal container body! Even if the container has a cylindrical body inserted into it, the sealing performance has been improved, the cylindrical body cannot rotate, and the shoulder and body wall are relatively thin. Another object of the present invention is to provide a container that does not produce buckling noise due to axial load.

The present invention is based on a glass container in which a threaded portion is formed on the outer periphery of the mouth and neck of the metal container body! The cylindrical body ll is extrapolated,
Another object of the present invention is to provide a method for manufacturing a container in which the sealing performance is improved and the joints are immovable.

(Structure of the Invention) The present invention provides a structure in which a cylindrical body made of plastic with no threaded portion formed on the outer periphery is tightly inserted into the outer surface of the mouth and neck of a metal container body, and the cylindrical body The present invention provides a container characterized in that the end face is cleaned by a curled part extending from the upper end of the mouth and neck part.

Furthermore, the present invention provides that a cylindrical body made of plastic and having a threaded portion formed on the outer periphery is tightly inserted into the outer surface of the mouth and neck of the metal container body in a non-rotatable manner; The end face is a curled part extending from the upper end of the mouth and neck. The entire container is characterized in that an annular protrusion is provided on the τ side of R to support the axial load during capping.

The present invention also provides a method for forming a cylindrical portion by punching out the top of the cup-shaped portion of a metal container body upper body blank in which the cup-shaped portion to become the mouth and neck portion is fully formed. A cylindrical body made of plastic with an inner diameter that is slightly smaller than the outer diameter of the part, and a threaded part formed on the outer periphery. , is tightly inserted into the outer surface of the cylindrical part, and the entire portion of the cylindrical part extending upward from the cylindrical body is curled outwardly, so that the upper end surface of the cylindrical part is curved outwardly. The present invention provides a method for manufacturing a container, characterized in that a container body upper body formed entirely of a covering curl portion is joined to a container body lower body.

(Example of Container) The container of the invention will be described below with reference to all the drawings which are examples.

(Structure) In FIGS. 1, 2, and 3, a container 1 includes a container main body 2 and a plastic 1.
It consists of a cylindrical body 4 made of

The container body 2 is formed by forming an open end 5a of an upper body 5, which is formed by press forming a metal plate such as an aluminum alloy plate or a tin-plated steel plate, and by forming the inner side of the upper body 5 into a long metal plate or by ironing the metal plate. The open end 6a'iz of the formed lower body 6 is joined via an adhesive layer (not shown).

The lower end of the cylindrical neck portion 3 of the upper body 5 is connected to an outwardly extending step portion 7 on which the cylindrical body 4 is seated.

Also, after extending radially outward from the upper end of the mouth and neck part 3, a fourth
A curled part 9 formed by a hanging part 9ai shown by the solid line in the figure and hanging down is connected to the upper end = 10 of the cylindrical body 4 which is flat in the circumferential direction and has no longitudinal ridges, etc., and the upper outer circumferential surface of the small diameter. It is closely related to 11.

The curled portion 9 is flat in the circumferential direction.

(Functions and Effects of the Curled Portion) As described above, the upper end of the cylindrical body 4 is flat in the circumferential direction, similar to the upper end surface of a normal plastic container, and therefore the curled portion 9 on the upper end surface ti It is also formed flat in the circumferential direction. That is, as shown in FIG. 4, the curled portion 9 of the cap 12 that engages with the gasket 17 is made of metal that has high specific axial rigidity, is hard to be damaged, and is flat in the circumferential direction. It is possible to ensure complete sealing.

(Continuation of the structure) The cylindrical body 4 is made of plastic, for example, polyolefin such as polyethylene, or polyethylene terephthalate, etc., and the cap 12 (see Fig. 4), in this case a pilfer-proof cap, is screwed on by roll-on. A threaded portion 13 for attaching, a circumferential protrusion 14° provided below for engagement with a Bilfer Bluff band (not shown), and a shaft for a stopper provided further below. On a support (not shown) to support the load,
It is provided with a radially outwardly projecting annular retaining ring 15 which can be retained in place. Note that the outer diameter of the hanging portion 9a of the curled portion 9 surrounding the upper outer circumferential surface 11 is as follows.

In order to make it possible to remove the cap 12, the outer diameter of the upper outer circumferential surface 11 is determined to be smaller than the outer diameter of the trough of the threaded portion 13.

(Functions and Effects of Retaining Ring) The retaining ring 15 can serve to support the axial load by engaging a support (not shown) with the bottom surface of the stopper. Therefore, the container 1 has the advantage that there is no need to consider the axial load during capping when setting the thickness of the metal forming the container, and the thickness can be made relatively thin. have

For example, the container body 2 is made of aluminum alloy! 1, the thickness of the shoulder portion 5b of the upper body 5 is 0.23 rran, and the thickness of the trunk wall portion 6b of the lower body 6 is 0.144 rran, then when an axial load of 110 ky is applied to the mouth and neck portion 3. The shoulder portion 5b buckles first. However, Pirfapurufukya.

Capping vfK by roll-on method of 12, mouth and neck 3
The near-fire axial load applied to the engine is typically 200 k,%.

Therefore, if the retaining ring 15 is not provided, the wall thickness of the shoulder portion 5b and the lower body 6 must be made much larger than the above values, but in the case of the container 1, the retaining ring 15 absorbs the axial load. Support the part below the shoulder 5b (to ensure that the axial load does not change).

Therefore, even if the shoulder portion 5b and body wall portion 6b are relatively thin as described above, buckling does not occur during capping.

If there is no risk of buckling due to the axial load applied to the retaining ring 1, e.g.
There is no necessity to provide 5.

(Continuation of configuration) The inner diameter (diameter) of the cylindrical body 4 before extrapolation is the same as the outer diameter (diameter) of the neck part 3 so that the cylindrical body 4 can be inserted into the outer surface of the neck part 3 without rotation. ), for example, O'# to oJ-. The difference between the outer diameter and the inner diameter is determined as appropriate depending on the material, outer diameter, wall thickness, etc. of the mouth and neck portion 3 and the material, outer diameter, shape, wall thickness, etc. of the cylindrical body 4.

(Functions and effects of 7 insertions) As described above, since the cylindrical body 4 is tightly inserted into the outer surface of the mouth and neck part 3 in a non-rotatable manner, the cylindrical body 4 is tightly inserted into the outer surface of the mouth and neck part 3. The shaped body 4 does not rotate, so plugging and opening can be performed smoothly. Further, since the immobility is not achieved by engaging recesses and protrusions such as wrinkles, the structure of the cylindrical body 4 and the neck and neck portion 3 is simple.

(Other embodiments of the container) The shape of the curled portion 9 is such that the lower portion (corresponding to the hanging portion 9a) along the upper outer circumferential surface 11 is 9 as shown by the dotted line in FIG.
It may be bent downward on the inner side and bit into the upper outer circumferential surface 11 of the cylindrical body 4, as shown in FIG. In this case, there is no risk of the liquid content entering between the curled portion 9 and the cylindrical body 40 during the filling and sealing process, and there is an advantage that the generation of mold due to the liquid that has entered is prevented.

FIG. 5 shows a curled portion 19 according to another embodiment of the present invention, and the curled portion 19 extends from the upper end of the mouth and neck portion 3' and has a flat circular cross-section in the circumferential direction. , a rigid core material 20 such as a steel wire or a hard synthetic resin wire is closely inserted into the inside thereof, and is reinforced by the core material 20.

The upper end surface 10' of the cylindrical body 4' has a shape substantially corresponding to the lower surface of the curling part 9. In this case as well, since the curled portion 19 has high rigidity, sealing performance can be ensured.

FIG. 6 further shows a curled portion 21 according to another embodiment of the present invention, in which the curled portion 21 extends from the upper end of the spout neck portion 3// and regenerates approximately once into a circular cross-sectional shape that is flat in the circumferential direction. After being wound, the end portion 21m extends linearly in the input direction, which is approximately the load direction during capping, and the end surface 21a+ is connected to the wound portion 2.
It is formed so as to protrude from the inner surface of 1b. In this case as well, since the curled portion 21 is reinforced by the end portion 21a against the load during capping, sealing performance can be ensured.

(Example of container manufacturing method) Next, an example of the method for manufacturing a container of the present invention will be described.

FIG. 7 shows the mouth and neck part 3 formed by press-forming a metal blank.
A blank 24 of a container body upper body is shown, with a cup-shaped portion 25 to be formed by stretch molding. The height of the cup-shaped portion 25 from the upper surface of the stepped portion 7 to the upper surface of the top portion 26 is set to be slightly higher than the height of the cylindrical body 4 to be extrapolated. Next, using this force, the top part 26 of the hollow part 25 is punched out, leaving part or all of the curved part 29,
A cylindrical portion 30 is formed (FIG. 8).

A tool 34 is prepared that includes a cylindrical portion 31 having an outer diameter substantially equal to the inner diameter of the cylindrical portion 30, and a presser 33 having a hollow short cylindrical protrusion 32 that can be engaged with the inner surface of the stepped portion 7. Then, as shown in FIG. 9, the cylindrical portion 31 is
Insert the protrusion 32 into the inner surface of the stepped portion 7.

A cylindrical body 4 made of plastic having a threaded portion 13 formed on the outer periphery and an inner diameter slightly smaller than the outer diameter of the cylindrical portion 30 is prepared, and the retaining ring 15 side of this cylindrical body 4t faces the cylindrical portion 30. In this way, it is fitted into the hole 36 of the holder 35 coaxially with the cylindrical part 30. The inner diameter of the inner circumferential surface 36b of the hole 36 above the cylindrical body 4 is set to be substantially equal to the outer diameter of the cylindrical portion 30.

Next, with the holder 35 fixed, the cylindrical portion 30 is press-fitted into the cylindrical body 4 while the tool 34i is raised together with the blank 24 into the rising chamber. After the lower surface of the cylindrical body 4 comes into contact with the stepped portion 7 and the rise of the pick cylindrical portion 30 is stopped, if the cylindrical portion 31 continues to rise, as shown in FIG. 29
is corrected to extend in the axial direction between the cylindrical portion 31 and the upper inner circumferential surface 36b of the hole 36, and becomes a protruding portion 37.

Next, as shown in FIG. 11, the cross section of the portion corresponding to the upper end surface 10 of the cylindrical body 4 is pre-curled by pressing the protruding portion 37 with a pre-curling tool 39 containing an arcuate hole 38. A pre-curl portion 40 is formed. Then the first
As shown in FIG. 2, a curling tool 42 having a hole 41 with a cross-sectional shape corresponding to the vicinity of the upper end surface 10 is used to press the pre-curl portion 40 so that it comes into close contact with the vicinity of the upper end surface 10, and the hanging portion 9a' By going through the pre-curling process, the curled part 9 can be firmly and reliably fitted to the upper end surface 10, and the cylindrical part 300 can be buckled and curled when the curled part is formed. The upper body 5t having the mouth portion 3 formed as described above is prepared by a known method, for example, JP-A-58-17303.
A container is manufactured by joining the lower body 6 to the lower body 6 by the method disclosed in Japanese Patent No. 4.

A container fitted with a cylindrical body without a retaining ring 15 may also be used.
It is manufactured in the same manner as above.

(Effects) The manufacturing method of the present invention is a plastic container in which a threaded portion is formed on the outer periphery of the outer surface of the mouth and neck of a metal container body.

It is said that it is possible to relatively easily and reliably manufacture a container in which a cylindrical body with a vertical V is inserted in a non-rotatable manner, and the upper end surface of the cylindrical body is covered with a curled part extending from the upper end of the mouth part. be effective.

[Brief explanation of drawings]

Fig. 1 is a Seiran diagram of a container that is an embodiment of the present invention, Fig. 2 is a vertical sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a longitudinal sectional view taken along the line ■-■ in Fig. 1. 4 is a longitudinal cross-sectional view of essential parts showing a sealed state of the container having the curled portion of the first embodiment of the present invention and the container having the curled portion of the second embodiment of the present invention; FIG.
FIGS. 5 and 6 are longitudinal cross-sectional views of main parts showing sealed states of containers having curled portions according to the third and fourth aspects of the present invention, respectively, and FIG. 7 is a manufactured container of the present invention. FIG. 8 is a vertical cross-sectional view of the main part of the blank for the upper body of the container used for the purpose of the present invention, and shows the state after the top part is punched out from the cup-shaped part of the blank in FIG. 7 to form a cylindrical part. 9 is a vertical sectional view of the entire cylindrical body shown in FIG. 8 immediately before extrapolation, and FIG. 10 is a longitudinal sectional view showing the main part of the cylindrical part shown in FIG. The longitudinal cross-sectional views, FIGS. 11 and 12, are
A pre-curl portion and a curl in the cylindrical portion in Fig. 10? FIG. 3 is a vertical cross-sectional view of a main part showing a formed state. l...container, 2...container body, 3, 3', 3
〃... Mouth and neck, 4.4'... Cylindrical body, 5... Container main body upper body, 6... Container, main body lower body, 8... Convex part, 9, 19.21. ... Curled part, 10,1σ... Upper end surface, 13... Threaded part, 15... Retaining ring, 16
... Concavity, 24 ... Blank of upper body of container body, 2
5...Cup-shaped part, 26...Top part, 30...Cylindrical part. Figure 1 Figure 3 Figure 4] 2 Figure 6 Figure 8 Figure 1o Figure 12 Figure 11

Claims (3)

[Claims] (1) A cylindrical body made of plastic with a threaded portion formed on the outer periphery is tightly inserted into the outer surface of the mouth and neck of a metal container body, and the upper end surface of the cylindrical body is attached to the outside of the mouth and neck. A container characterized by being covered by a curled portion extending from the upper end. (2) A cylindrical body made of plastic with a threaded portion formed on the outer periphery is tightly inserted into the outer surface of the mouth and neck of the metal container body, and the upper end surface of the cylindrical body is attached to the outside of the mouth and neck. A container characterized by being covered by a curled portion extending from the upper end, and further comprising a retaining ring provided below the threaded portion of the cylindrical body for supporting an axial load during capping. (3) Form a cylindrical part by punching out the top of the cup-shaped part of the metal container body upper body blank in which the cup-shaped part to become the mouth and neck part is formed, and form the outer part of the cylindrical part. A cylindrical body made of plastic with an inner diameter slightly smaller than the diameter and a threaded portion formed on the outer periphery is tightly inserted into the outer surface of the cylindrical body, and the portion of the cylindrical body extending upward from the cylindrical body is inserted outward. A method for manufacturing a container, comprising joining a container body upper body formed by curling to form a curled portion covering an upper end surface of the cylindrical body to a container body lower body.