JP3041612U - Liquid container - Google Patents

Abstract

(57) Abstract: [PROBLEMS] To provide a liquid container formed of a paper material which can maintain its liquid tightness even if it contains a water-soluble liquid and is easy to incinerate. SOLUTION: A tubular body 10 made of a paper material, a bottom lid 20 made of a metal material and fixed to a lower portion of the body 10, and an annular base fixed to an upper portion of the body 10. 30 and an opening lid 40 formed so as to be freely inserted into and removed from the mouthpiece 30, the mouthpiece 30 and the bottom lid 20.
Is an annular inscribed wall 33 that is in pressure contact with the inner periphery of the end of the body portion 10,
23 and the inner connecting walls 33, 23 integrally provided with annular connecting portions 32, 22 straddling the end face of the body portion 10 and annular outer contact walls 31, 21 press-contacting the outer circumference of the body portion 10 end portion. The circumscribing walls 31 and 21 are first wall portions 31a and 21a whose open ends are folded back inward in the radial direction to form double walls, and second wall portions 31b and 21b which are single walls. And the second wall portions 31b and 21b have a height of 2/5 to 3/5 of the height of the circumscribing walls 31 and 21.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a container for containing a water-soluble liquid, for example, a liquid container for containing household water-based paint.

[0002]

[Prior art]

 In the past, household paints have generally been used in which a metal can holds an oil paint containing a drying oil as a main component of the coating film. However, when the oil-based paint is discarded after use, it is possible that the oil-based paint remaining in the can may contaminate the surrounding environment, and it is easy for the user to handle. The paint is now dominated. However, when a water-soluble liquid such as a water-based paint is stored in a metal can, there is a problem that the metal can easily rusts because the content contains a lot of water, and the metal can is incinerated after use. There was a problem that it was difficult to dispose of and difficult to dispose of.

[0003]

[Problems to be solved by the device]

 Therefore, instead of a metal can, which is difficult to incinerate, as a container that holds a water-soluble liquid such as a water-based paint, it is possible to use a paper container mainly made of paper material such as cardboard or synthetic paper that is easily incinerated. Conceivable.

Conventionally, such a paper container has been used for accommodating contents such as coffee grounds or granular soup, but this paper container has a higher external capacity than liquid. It is used as a container for storing contents that are difficult to leak into, and its structure is, for example, a cylindrical body made of paper material and fixed to the bottom lid fixed to the lower part of the body and the upper part of the body. A ring-shaped base and a circular opening cover that can be opened and closed are formed of a metal material, and the body and the bottom cover, and the body and the base are sealed by a winding structure. .

Since the body is made of paper, the winding structure employs a double winding structure in which the base F and the body G are double-wound like a metal can shown in FIG. It is difficult to do so, and a single winding structure as shown in FIG. 6 is adopted.

The winding structure shown in FIG. 6 has an inscribed wall C that is pressed against the inner circumference of the upper part of the body, a connecting part B that continues to the inscribed wall C and straddles the upper end surface of the body, and the upper part of the body. It is formed so as to sandwich the upper part of the body with a die having an outer wall A that is pressed against the outer periphery, and the outer wall A is a double wall formed by bending the open end of the outer wall inward in the radial direction. It has a first wall portion A1 and a second wall portion A2 made of a single wall. Further, in the winding tightened state, the first wall portion A1 projects from the second wall portion A2 to the contact surface side with the outer circumference of the body portion, and the entire outer contact wall A is tightened in the body portion. As a result, the protrusion extends into the outer periphery of the upper part of the body.

However, since the paper container is manufactured by diverting parts such as a base used in a conventional metal can, for example, a base F of a metal can shown in FIG. When diverted to, the height of the second wall portion A2 of the circumscribing wall A can be only a small height, as shown in FIG. Therefore, in the wound state, the height of the sandwiched portion D sandwiched between the second wall portion A2 and the inscribed wall C in the body portion is also small, and the sandwiched portion D causes the height of the sandwiched portion D to be small. Since the biting portion of the first wall portion A1 is locked, the following problems occur.

That is, for example, when the water-based paint in the container is affected by the outside air temperature and the container internal pressure Ip rises above the outside air pressure, the forces P1 and P2 applied to the wound portion cause the force in the clamped portion D to increase. There is a possibility that the hooking portion with the first wall portion A1 may be rolled up or may be torn off, the first wall portion A1 may be removed upward, and the base may come off from the body portion.

As described above, from the viewpoint of facilitating disposal, a storage container using a paper material that is easily incinerated is desired, but conventional paper containers contain a water-soluble liquid such as an aqueous paint. It was difficult to maintain liquid tightness in the case of.

The present invention has been made in view of the above problems, in which the body, which occupies most of the container, is formed of paper material, and the body and the base and the body and the bottom cover are wound. It is an object of the present invention to provide a liquid container that can be easily incinerated and that is capable of maintaining liquid tightness even if it contains a water-soluble liquid by designing a closing structure.

[0011]

[Means for Solving the Problems]

 In order to achieve the above object, the liquid container according to claim 1 has a tubular body, a bottom lid fixed to the lower part of the body by a winding structure, and a winding structure on the upper part of the body. A ring-shaped base fixed by means of an opening lid and an opening lid formed so as to be freely fitted into and removed from the mouthpiece, the body is made of paper material, and the bottom lid, the base and the opening lid are made of metal material. The cap and the bottom lid are formed, and an annular inscribed wall is in pressure contact with the inner periphery of the body end, an annular connecting portion that straddles the body end surface continuously to the inscribed wall, and the body In a liquid container integrally provided with an annular circumscribing wall that comes into pressure contact with the outer circumference of an end portion, the circumscribing wall is a first wall portion in which an open end is folded back radially inward to form a double wall. And a second wall portion composed of a single wall, and the second wall portion has a height of 2/5 to 3/5 of the height of the circumscribed wall. And the.

According to the liquid container of the first aspect, in a state in which the mouthpiece is wound around the upper end of the body portion, it is sandwiched between the second wall portion and the inscribed wall at an upper portion of the body portion. The first wall portion is hooked to the held portion to be held, and the second wall portion has a height of 2/5 to 3/5 of the height of the circumscribing wall. The part will also have a sufficient height. Therefore, even if the internal pressure of the container rises and a vertical force acts on the winding-fastened portion, the portion of the clamped portion D with which the first wall portion A1 is hooked up or tears up. Therefore, the first wall portion A1 can be securely hooked, and thus the base can be securely wound around the body portion. When the height of the second wall portion is 2/5 or less of the circumscribed wall, it is impossible to effectively prevent the upper end of the body portion from rolling up or tearing due to the increase in the internal pressure of the container as described above. At a height of / 5 or more, the circumscribing wall itself becomes high, and it becomes impossible to apply a sufficient winding force depending on the existing winding machine. Further, since the winding structure of the bottom lid is similar to that of the cap, even when the bottom lid is wound around the lower end of the body portion, the bottom lid can be securely attached to the body portion as described above. You can tighten it. Therefore, it is easy to incinerate the body, which occupies most of the container, and the strength of the body-to-base winding part and the body-to-bottom part is increased, so that the water-soluble liquid inside the container Liquid tightness can be maintained even if the body is housed.

A liquid container according to a second aspect is the liquid container according to the first aspect, wherein a synthetic resin film having a thickness of 15 μm or more is provided on at least respective fitting surfaces of the mouthpiece and the opening lid. Is formed.

Therefore, according to the above-mentioned liquid container, the degree of airtightness is enhanced in the fitted state of the mouthpiece and the opening lid, and the liquid tightness is excellent, and further the protection of the contents and the fitting strength are achieved. It will be excellent.

A liquid container according to a third aspect is the liquid container according to the first or second aspect, in which an elastic filler layer is provided between the connecting portion and the body end surface facing each other. It is characterized by Therefore, it is possible to enhance the degree of tightness between the connecting portion of the base and the bottom lid and the end face of the body portion, and to improve the liquid tightness when the water-soluble liquid is contained in the container.

[0016]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partial cross-sectional side view of a liquid container according to the present invention, FIG. 2 is a cross-sectional view of an essential part showing a winding structure of a container upper part and a fitting structure of a cap and an opening lid, and FIG. FIG. 3 is a cross-sectional view of a main portion showing a lower winding structure.

In FIGS. 1 to 3, reference numeral 10 denotes a body of the container, which is formed in a substantially cylindrical shape. An annular base 30 that holds a disc-shaped opening lid 40 in a detachable manner is wound around and fixed to the upper portion of the body portion 10, and a bottom lid 20 is wound around and fixed to the lower portion. It is fixed. The internal volume is in the range of several hundreds of milliliters to several liters, for example, about 700 milliliters, and a water-soluble liquid such as household water-based paint is contained and sealed inside.

As shown in an exaggerated manner in FIGS. 2 and 3, the body portion 10 is formed of a laminated structure composed mainly of incinerable paper materials 11 such as thick paper and synthetic paper. A reinforcing film layer 12 made of a resin film layer made of an olefin resin film such as polyethylene or polyethylene terephthalate and an aluminum foil layer 13 are laminated on the inner surface side of the sheet material, and a paper label or the like is formed on the surface side of the paper material 11. The surface layer 14 to be formed is laminated and has a thickness of about 1 to 3 mm.

The base 30 is made of a metal material such as a high-strength steel plate, and as shown in FIG. 2, an annular circumscribing wall 31 that is in pressure contact with the outer periphery of the upper portion of the body 10, and the body 10 in succession thereto. Connection part 32 in contact with the upper end of the body 10, an annular inscribed wall 33 in pressure contact with the inner periphery of the upper part of the body 10, an annular inclined wall 34 inclined upward from the lower end of the inscribed wall 33, and the annular inclination An annular fitting wall 35 that hangs downward from the top of the wall 34 is integrally provided. The circumscribing wall 31 includes a first wall portion 31a in which an open end of the circumscribing wall 31, that is, a lower end is folded back inward in a radial direction to form a double wall, and a second wall portion in which the circumscribing wall 31 is a single wall. 31b, and the first wall portion 31a and the second wall portion 31b are formed at substantially the same height. A curl portion 36 is formed by curling the end portion of the annular fitting wall 35 inward of the container.

The opening lid 40 is made of a metal material such as a high-strength steel plate like the base 30, and has a circular top surface 41 and an outer peripheral portion of the top surface 41 continuously extending in the fitting direction. It is provided with a fitting protrusion 42 that protrudes, and an annular flange 43 that is the same surface as the top surface 41 that is continuous with the fitting protrusion 42, and the outer peripheral wall surface 42 a of the fitting protrusion 42 is the annular shape of the base 30. The contents are sealed by closely fitting with the fitting wall 35. A curled portion 43a is formed by curling the open end of the annular collar portion 43 toward the inside of the container.

At least the mating surfaces of the mouthpiece 30 and the opening lid 40 have a synthetic resin film with a thickness of 15 μm or more, which is larger than the normal baking coating film of about 10 μm. Since C is formed by a coating means such as a flow coat, the liquid-tightness of the water-soluble liquid can be maintained, and the contents and the fitting strength when fitted can be excellent.

The bottom lid 20 is made of a metal material such as a high-tensile steel plate like the base 30 and the opening lid 40, and as shown in FIG. 3, has a circular shape having a diameter substantially the same as the inner diameter of the body 10. Of the bottom surface 24, an annular inner wall 23 that hangs downward from the peripheral edge of the bottom surface portion 24 and presses against the inner periphery of the lower portion of the body portion 10, and continuously to the lower end of the body portion 10. It integrally includes a connecting portion 22 that contacts and a circumscribing wall 21 that is pressed against the outer periphery of the lower portion of the body portion 10. The circumscribing wall 21 folds the open end of the circumscribing wall 21, that is, the upper end inward in the radial direction. On the contrary, the first wall part 21a having a double wall and the circumscribing wall 21 has a single second wall part 21b, and the first wall part 21a and the second wall part 21b. And are formed at approximately the same height.

Further, between the connecting portion 32 of the base 30 and the upper end of the body portion 10 and between the connecting portion 22 of the bottom lid 20 and the lower end of the body portion 10 shown in FIG. As shown in b, a filler layer 60 made of a butyl rubber type rubber compound is provided. Specifically, the upper end and the lower end of the body portion 10 are formed in a plane shape that is substantially orthogonal to the inner peripheral surface of the body portion, and the connecting portions 32 and 22 are curved so as to bulge outward so that the curved inner surface of the connecting portion 32 and the body portion 10 are curved. When the space defined between the outer wall and the upper end of the body is filled with the filler and the outer wall 31 and the inner wall 33 are pressed against the peripheral surface of the body 10, the outer wall 31 and the outer wall 31 are separated from the outer wall. The filler layer 60 having elasticity is provided between the inner periphery of the upper portion of the body 10 and between the inscribed wall 33 and the inner periphery of the upper portion of the body 10 so as to concentrate in the space as much as possible. The filler is filled in the space defined between the curved inner surface of the portion 22 and the lower end of the body 10, and the inner wall 23 and the outer wall 21 are pressed against the peripheral surface of the body 10. In this case, the space between the inner wall 23 and the lower inner periphery of the body portion 10 and the outer wall 21 and the body portion 10 are separated from each other. Between the lower outer periphery, it is a filler layer 60 having elasticity of providing as much as possible concentrated in the space.

The outer periphery of the upper end of the body 10 configured as described above is engaged with the end of the circumscribing wall 31 of the base 30 as shown in FIG. 1 to prevent upward movement. A handle 71 is attached through an annular attachment ring 70 that is formed.

When the base 30 having the above-described structure is wound around the upper end of the body portion 10, it is held between the second wall portion 31 b and the inscribed wall 33 in the upper portion of the body portion 10. Since the first wall portion 31b is hooked on the sandwiching portion 10a, and the second wall portion 31b has a height h2 that is approximately ½ of the height h1 of the circumscribing wall 31, the above-mentioned cover The sandwiching portion 10a also has a sufficient height, so that even if the container internal pressure rises and a vertical force is exerted on the winding tightening portion, the sandwiching portion 10a does not contact the first wall portion 31a. The first wall portion 31a can be securely hooked without the hooking portion being turned up or broken, and the base 30 can be securely wound around the body portion 10. Further, since the winding structure of the bottom lid 20 is similar to that of the mouthpiece 30, when the bottom lid is wound around the lower end of the body portion 10, the bottom lid 20 is attached to the body portion in the same manner as described above. It can be securely tightened to 10.

If the second wall portions 31b and 21b have a height of 2/5 to 3/5 of the total height of the circumscribing walls 31 and 21, the above-mentioned effect is obtained.

In the liquid container having the above-described configuration, it is easy to incinerate the body portion 10 that occupies most of the container, and even when the water-soluble liquid is stored inside the container, The strength of the portion wound with the mouthpiece 30 and the portion wound with the body portion 10 and the bottom lid 20 is increased, so that the liquid tightness can be maintained even if the water-soluble liquid is contained in the container. Further, since the synthetic resin film 50 having a thickness of 15 μm or more is formed on at least the respective fitting surfaces of the base 30 and the opening lid 40, the fitting of the base 30 and the opening lid 40 is performed. The tightness of the state is improved, the liquid tightness is excellent, and the protection of the contents and the fitting strength are also excellent.

[0028]

[Effect of the invention]

 As described above, according to the liquid container of claim 1, it is easy to incinerate the body portion that occupies most of the container, and the body portion and the base are fastened together and the body portion and the bottom lid. The strength of the portion to be wound with is increased, and the liquid tightness can be maintained even if the water-soluble liquid is stored inside the container.

According to the liquid container of the second aspect, the degree of sealing of the fitting state of the mouthpiece and the opening lid is improved, the liquid tightness is excellent, and the protection of the contents and the fitting strength are achieved. It will be excellent.

According to the liquid container of the third aspect, it is possible to enhance the degree of sealing between the connecting portion of the base and the end face of the body and the end face of the body portion, and it is possible to store the water-soluble liquid inside the container. Liquid tightness can be improved.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view of a liquid container according to the present invention.

FIG. 2 is a cross-sectional view of relevant parts showing a winding structure of an upper part of the container and a fitting structure of a mouthpiece and an upper lid.

FIG. 3 is a cross-sectional view of an essential part showing a winding structure of a container lower part of the same container.

FIG. 4 is a cross-sectional view showing another winding structure of the same container, (a) showing a winding structure of a base portion and (b) showing a winding structure of a bottom lid portion.

FIG. 5 is a cross-sectional view of essential parts showing a conventional metal can winding structure.

FIG. 6 is a cross-sectional view of a main part for explaining a conventional winding structure for a paper can.

[Explanation of symbols]

 10 Body 11 Paper Material 20 Bottom Lid 30 Base 21, 31 Outer Wall 21a, 31a First Wall 21b 31b Second Wall 22, 32 Connection 23, 33 Inner Wall 40 Opening Lid 50 Synthetic Resin Film 60 Filler layer

Claims (3)

[Utility model registration claims] 1. A tubular body, a bottom lid fixed to the lower part of the body by a winding structure, an annular base fixed to the upper part of the body by a winding structure, and the base. An opening lid formed so as to be freely fitted and removed, the body portion is formed of a paper material, the bottom lid, the base and the opening lid are formed of a metal material, and the base and the bottom lid are formed of a body portion. An annular inscribed wall that press-contacts the inner circumference of the end, an annular connecting portion that straddles the body end face continuously to the inscribed wall, and an annular outer-contact wall that press-contacts the outer circumference of the body end. In the liquid container, the circumscribed wall has a first wall portion in which an open end is folded back inward in the radial direction to form a double wall, and a second wall portion formed of a single wall. The second container has a height of 2/5 to 3/5 of the height of the circumscribing wall. 2. The liquid container according to claim 1, wherein a synthetic resin film having a thickness of 15 μm or more is formed on at least respective fitting surfaces of the base and the opening lid. 3. The liquid container according to claim 1, wherein an elastic filler layer is provided between the connecting portion and the body end surface facing each other.