JPH0457751A - Tube-like container - Google Patents

Abstract

PURPOSE:To obtain a tube whose inner wall easily rotates reversely when its contents are filled therein and which is large in volume, easy to squeeze out and retainable in shape by a method wherein the tube is formed into a concave configuration in its empty condition and either of upper or lower boundary between the inner end outer walls of a hollow-out part is made to lie in almost the same plane as a boundary between both sides of the tube. CONSTITUTION:A tube-like container is formed into a concave configuration shaped, for example, like trough or boat, when its contents are not filled therein and a boundary line (joint line) 3 between the outer wall 1 and inner wall 2 of a hollow-out part at both sides 7 of the container lies in the same plane as a boundary 3' of the upper part 5 of the container and a boundary 3'' of the bottom part 6 thereof. As a result, the inner well 2 of the hollow-out part is reversely rotated about the, plane in which lies the boundary (joint line) as a symmetrical plane to become swollen or depressed nearly symmetrically. In this way the reverse rotation of the inner wall 2 of the hollow-out part becomes easy and the volume of the container becomes large to permit the contents to be squeezed out easily with the fingers.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a tube-shaped container for containing cream-like, pasty-like, etc. substances.

``Conventional technology'' Substances such as cosmetic creams, toothpaste, medicines, adhesives, paints, detergents, seasonings, and foods are placed in tube-shaped containers, and when used, they are squeezed out by squeezing the tube. Served. In this case, in addition to the inherent disadvantage as a container that the tube is easily soaked because it does not have rigidity,
It has been pointed out that while it is fine while there is a lot of content in the tube, it becomes difficult to squeeze out the contents when the content decreases, and the appearance also spoils the aesthetic appearance of containers for cosmetics, etc. It was a problem.

``Problems to be Solved by the Invention j In view of the above-mentioned drawbacks, the present inventor has devised a method which is formed in a concave state when the contents are empty, and when the contents are filled, the inside of the concave becomes flexible. He proposed a tube-shaped container in which the wall inverts and swells into a convex shape, and when the contents are squeezed out, the inner wall inverts again and returns to the concave state along the outer wall.
-84).

The present invention is a container that is formed in a concave shape when not filled with the contents as described above, and when the contents are filled, the inner wall is easy to turn over, the capacity is large, and the container can be squeezed out with fingers. The purpose is to provide a squeezing container suitable for

"Means for Solving the Problems" Hereinafter, the present invention will be described in detail using several embodiments with reference to the drawings, but the present invention is not limited to the embodiments.

The tubular container of the present invention is formed into a concave shape, for example, like a gutter or a boat, when it is not filled with contents. That is, as shown in FIG. 2a, which is a plan view of an example of the tubular container of the present invention, the cross section taken along the line X-X in FIG. The arc of the tube wall 2 inside the recess is formed larger than the arc of the tube wall 2 inside the recess.As can be easily seen in Figure 0, there is a gap between the tube wall 1 outside the recess and the tube wall 2 inside the recess. If the two are formed so that they are in close contact with each other, it is easy to squeeze out the contents completely, and when the contents are filled, the groove-shaped recess becomes a tube wall inside the recess, as shown in Figure 2. The curvature of 2 is reversed, and the outer wall 1 and the inner wall 2 of the recess
When the filled container is pressed with a finger or a presser member and the contents are squeezed out, it will dent again as shown in Figure 2 a. Return to normal state. FIG. 3 is a vertical sectional view taken along line Y-Y in FIG. 1, which is a plan view of one example of the tubular container of the present invention, and shows a state in which the inner wall 2 of the recess is filled with contents and swollen. It is indicated by the dotted line 2'.

Figure 4a is a left side view (view from the squeezing opening) of the tubular container of the example in Figure 1, and Figure 4a is a right side view (
(view from the bottom).

In this example, the spout 4 is provided in the outer wall 1 of the recess in the upper part 5 of the container, and for the sake of appearance the spout 4 is bent so that it appears to be at the position of the boundary 3; In addition, a modification portion 8 is provided to hide the bend. Providing the squeezing opening on the outer wall of the recess allows the inner wall to be inverted and brought into close contact with the outer wall, making it easier to squeeze out the contents to the end. However, the squeezing opening may be provided at the boundary 3.

Then, the boundary 3 (junction line) between the outer wall 1 and the inner wall 2 of the recess at both sides 7 of the container is the same as the boundary 3' of the top 5 part and the boundary 3'' of the bottom 6 part of the container. As a result, the inner wall 2 of the recess expands or recesses in a substantially symmetrical shape by inverting the surface with the boundary line (joint line) as the plane of symmetry.

Having the borders of both sides and the top and bottom on the same plane facilitates the inversion of the inner wall of the recess and increases the capacity of the container, making it easier to squeeze out with fingers.

FIG. 3C is a bottom partial view of a longitudinal section of a variation of an embodiment of the invention, FIG. 4C is a right side view (view from the bottom) thereof, and FIG. Examples of FIG. 3C1 FIG. 4C, which are bottom partial views in longitudinal section of other variations of embodiments of the invention, FIG. 4d being a right side view (view from the bottom); is an example in which the depth of the recess is near the bottom of the container and becomes shallower toward the bottom, as shown in Figure 3d.
The example shown in FIG. 4d is an example in which the depth of the recess becomes shallower toward the bottom, and further reaches zero depth at the bottom end. These are easy to operate and squeeze out sequentially from the bottom to the top.

The tube-shaped container of the present invention can easily bring the outer tube wall 1 and the inner tube wall 2 of the recess into close contact with each other, making it easy to squeeze out the contents without leaving any contents behind. Since the arch has a trough-like shape that is double formed by an outer wall and an inner wall, the shape of the portion from which the contents are squeezed out has good flexibility. This overcomes the disadvantages peculiar to tubes, such as the fact that conventional ordinary tube-shaped containers have extremely poor shape retention when the contents become low, and conversely, are too strong in restoring their swollen shape.

Note that the tubular containers of the present invention also include containers in which either the top or bottom boundary is on substantially the same plane as the boundaries on both sides. It is on almost the same plane as the boundary of the
The remaining bottom or top portion may be arc-shaped as in Japanese Patent Application No. 1984-1984, or may have an umbrella-shaped shoulder portion at the top.

FIG. 2C shows an example in which the outer wall 1 of the recess is made of a rigid material. For connection with the flexible inner wall, a lamination of a rigid material with a layer suitable for adhesion may be used; FIG. This is an example of it stretching and acting as a protector. If these outer walls are made of a rigid material, a removable protective cover in the form of a gutter or plate of a corresponding shape may be provided on the upper and lower walls of a similarly rigid material. Providing the above-mentioned squeeze opening on the outside wall, where only the bottom part may have an extended arc or a ring, is easy in manufacturing when the outside wall of the recess is made of a rigid material. The functionality is also good.

In the tubular container of the present invention, there is no or little change in the width of the tube between when the contents are filled and when the tube is squeezed out, and also when the contents are filled, the width of the tube changes throughout the container. The width is straight and constant all the way to the bottom.

In conventional tubes, when the contents are squeezed out and compressed, the width of the tube increases. Furthermore, when the container is full, the bottom is wide and extends beyond the width of the container, causing problems in appearance and requiring extra space during storage and display.

In manufacturing the tubular container of the present invention, for example, the material for the outer wall of the boat-shaped recess and the material for the inner wall of the boat-shaped recess, which is smaller by the thickness of a similar material, do not face each other. It can be formed by stacking them in the same direction and joining them by heat-sealing the edges. At this time, the inner end of the tube of the elongated joint 9 formed by overlapping edges becomes the aforementioned boundary line 3゜3', 3''. Note that at least the material of the inner wall of the recess is flexible. 0Synthetic resin sheets, films, laminates, metals, etc. used in tubular containers can be used.0Composite materials of synthetic resin sheets, films and cloth, nets, fibers, etc., e.g. It is also possible to use laminated materials, resin-coated materials, impregnated materials, etc. By modifying the flow of fibers in the inner wall material or by embossing the sheet in a linear manner, for example, it is possible to By creating a curved flow in a chevron shape in the direction of the outlet, when the bottom is gradually pressed to squeeze out the contents, the swollen part containing the contents and the squeezed out concave. 6. Synthetic resin tubes tend to overcome distortions at the boundaries of the exposed parts.6 When the strength is increased, synthetic resin tubes lose flexibility or have unnecessary resilience, but composite materials like the ones above lose flexibility. Strength can be increased without

Further, it is also possible to stack two planar or preformed sheets, heat-press them, and heat-seal the edges and the squeeze opening. Alternatively, a squeezing opening may be attached in advance to the sheet that becomes the outer wall.

When molding from a cylindrical material, the sides are already connected, so you can leave them as they are, or you can fold them into a gutter shape and heat-bond the edges, as shown in the example in Figure 2 a. Squeezing is easier if a suitable joint is formed.

The edges of the material on the outside wall of the recess and the edges of the material on the inside wall are joined with their cross sections oriented in the same direction and overlapped, and vice versa. When the inner wall is filled with contents and swells, it is easier to squeeze out the contents and then turn over again and return to the original shape of the recess, making it easier for the contents to be squeezed out.

In the tubular container of the present invention, the shape of the recess in the cross section when the container is not filled with contents may be appropriately selected depending on the purpose, use, etc., such as a circular arc shape, an elliptical arc shape, or a linear concave shape.

When the outer wall of the recess is rigid, it overcomes the weakness that is the weak point of squeeze containers, and the effect of maintaining the shape even when the contents are reduced is better.

1.---Outside wall of the recess 2....Inner wall of the recess 3...Boundary between the outside wall and the inside wall of the side of the container 3' -Outside of the top of the container Boundary between wall and inner wall 3
″... Boundary between the outer wall and the inner wall of the bottom of the container 4...
... Squeeze opening 5 ... Top of the container 6 ... Bottom of the container 7 ... Side part 8 ... Modification part 9 ... Joint part "Effects of the Invention" As is clear from the above, the tubular container of the present invention has
When filled with contents, the inner wall easily turns over, has a large capacity, is easy to squeeze out, and has excellent shape retention and appearance.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a cross-sectional view thereof, FIG. 3 is a vertical cross-sectional view, and FIG. 4 is a side view.

Claims (5)

[Claims] (1) It is formed in a concave shape like a gutter when the contents are not filled, and at least one of the upper part and the bottom part of the container at the boundary between the outer wall and the inner wall of the recess is , a tubular container characterized in that it lies approximately in the same plane as the boundary in the side portions of the container. (2) The tubular container according to claim 1, wherein the outer wall of the recess is rigid. (3) The tubular container according to claim 1 or 2, wherein the outer wall of the recess extends outside the boundary with the inner wall. (4) The tubular container according to any one of claims 1, 2, and 3, wherein the squeeze opening is provided on the outer wall of the recess. (5) A condition in which the recess is shaped like a gutter when it is not filled with contents, and the edge of the material on the outer wall of the recess and the edge of the material on the inner wall overlap in the same direction. A tubular container characterized by being joined with.