JP2003034321A - Synthetic resin vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crushable synthetic resin vessel which is used for packing a chemical liquid, a disinfectant, liquid soap, a liquid food, or the like, and can be crused more readily and improved in a volume reduction rate. SOLUTION: The crushable synthetic resin vessel is composed of a high- density polyethylene with a density of 0.945-0.968 and is provided with a longer body portion (1) with a horizontal cross section of substantially square or rectangular shape, a mouth portion (3) provided on the upper end side of the body portion (1) through a shoulder portion (2), and seven kinds of ribs i.e., longitudinal ribs (71) on the body portion (1), upper slant ribs (72), upper horizontal ribs (73), lower slant ribs (74), lower horizontal ribs (75), second upper horizontal ribs (76), and second lower horizontal ribs (77).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin container, and more particularly to a synthetic resin container that can be crushed to reduce its volume when it is discarded.

[0002]

2. Description of the Related Art In packaging liquid medicines, disinfectants, liquid soaps, liquid foods, etc.
Many synthetic resin containers that can be crushed to reduce their volume are used. Crushable containers are usually provided with bending ribs on the body so that they can be easily crushed.
For example, when pressed from the front and the back of the body, both sides are deformed so as to be buried inward from the rib as a starting point. Most of such containers are made of polyethylene that can be disposed of, but in order to distinguish a deformable part and a non-deformable part, in some cases, two materials having different hardness are selectively used (special features). Kaihei 10-3
16140).

[0003]

By the way, in the crushable container as described above, the side surface of the body portion is bent inward, so that the surface area is apparently small, but the side surface is inward, so that the body portion is bent. I can not crush the part enough,
Actually, there is a problem that the volume reduction rate is low because a large amount of space remains inside the body. Further, when materials having different hardnesses are used, the manufacturing apparatus becomes complicated, and the rigidity around the hard portion is high, so that it is also difficult to increase the volume reduction rate.

In the crushable synthetic resin container as described above, the present invention reduces the volume by using a specific material to make the wall thickness as thin as possible and improving the rib structure of the body. The purpose of the present invention is to provide a synthetic resin container which can be crushed more easily and which can further increase the volume reduction rate.

[0005]

In order to solve the above problems, the synthetic resin container of the present invention has a density of 0.945 to
A container made of crushable synthetic resin made of 0.968 high-density polyethylene, which has a vertically long body section having a substantially square or rectangular horizontal cross section, and an upper end of the body section via a shoulder section. It has a mouth provided on the side and seven kinds of ribs provided on the body, and the seven kinds of ribs have a length corresponding to 50 to 70% of the height of the body at each center of the two side surfaces. Vertical ribs that are arranged in a vertical direction, a pair of upper diagonal ribs extending from the vicinity of the upper end of each vertical rib toward the upper and lower corners of the front and back surfaces, side surfaces, and shoulders, and a pair of upper diagonal ribs. Upper horizontal ribs arranged at the upper ends of the respective side surfaces extending near the upper ends of the row ribs, and each extending from the vicinity of the lower ends of the respective vertical ribs toward the lower projected corners of the front and back surfaces, the side surfaces, and the bottom portion. A pair of lower diagonal ribs and a pair of lower diagonal ribs are arranged at the lower end of each side surface near the lower ends of the ribs. Lower horizontal ribs, a second upper horizontal rib arranged at a height corresponding to the upper end position of the vertical rib on each ridgeline portion on the front and back sides, and each side surface, and a lower end position of the vertical rib on each ridgeline portion. And a second lower horizontal rib arranged at a corresponding height.

That is, in the above-mentioned synthetic resin container, when the front and back are pressed to crush the body, the container is bent along the vertical ribs, the upper oblique ribs and the lower oblique ribs into mountain folds, and the upper horizontal ribs and By bending in a valley along the lower horizontal ribs, each side surface of the body portion protrudes outward, and by bending in a valley along the second upper horizontal ribs and the second lower horizontal ribs, shoulders and bottoms are formed. Projects relatively to the body and collapses into a state where the front and back contacts.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a synthetic resin container according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the appearance of a synthetic resin container according to the present invention. 2 and 3 are a top view (division view (a)), a front view (division view (b)) and a side view showing the appearance of the synthetic resin container according to the present invention, respectively. FIG. 4 is a diagram showing a crushed state of the synthetic resin container according to the present invention from the front side (division diagram (a)) and a side view (division diagram (b)). Hereinafter, in the description of the embodiments, a synthetic resin container is abbreviated as “container”.

The container of the present invention is a container made of a synthetic resin which is mainly used for containing a liquid substance and can be crushed when it is discarded, and is made of a high density polyethylene having a density of 0.945 to 0.968. Composed. By using high-density polyethylene having the above-mentioned density, the wall thickness can be reduced and the shape can be sufficiently retained during use, as will be described later. The container of the present invention can be manufactured by various blow molding methods.

As shown in FIGS. 1 and 2 (a), the container of the present invention has a vertically long body portion (1) having a substantially square or rectangular horizontal cross section and a shoulder portion (2). Body (1)
It is mainly composed of a mouth portion (3) provided on the upper end side of the. The illustrated container is a container in which the horizontal cross section of the body portion (1) is formed into a substantially square shape. As shown in FIGS. 1 to 3, the body portion (1) includes a front surface (11) and a rear surface (not shown). And the surface areas of the two side surfaces (12) are designed to be substantially equal. Although not shown, in the container in which the horizontal cross section of the body portion (1) is formed into a substantially rectangular shape, the surface corresponding to the short side in the horizontal cross section is the side surface.

The mouth portion (3) is provided with a screw portion (31) to which a lid (not shown) having a screw structure can be attached, for example. Further, since the separation type lid (virgin cap) that is opened by tearing off the lower end is attached, the screw part (3
A thick portion (32) is provided below 1) and a protrusion (32p) as a stopper is provided above the thick portion (32).
Are provided in plural. That is, when the lid of the separation type is swung to open, the lower ring portion is caught by the protrusion (32p) and remains on the outer periphery of the thick portion (32), and only the upper lid body is separated. I have it.

The base portion of the mouth portion (3) is provided with an annular reinforcing portion (33) which enhances the strength of the base portion and functions as a stop when the lid is mounted in the filling device. Although not shown, such a reinforcing portion (33) has a planar shape in order to securely hold the container side by the chuck of the device when the lid of the screw structure including the above-mentioned separation type lid is mounted in the filling device. It may be formed in a polygon such as a hexagon or an octagon.

The shoulder portion (2) is a portion extending from the upper end side of the body portion (1) to the base portion of the mouth portion (3), and the inclination angle of the shoulder portion (2) is preferably 10 to 40 °. The reason why the inclination angle of the shoulder portion (2) is set to the above angle is as follows. That is, when crushed, the internal space of the portion corresponding to the shoulder portion (2) remains, but when the inclination angle exceeds 40 °, the remaining internal space becomes large and the volume reduction rate becomes low. On the other hand, when the inclination angle is less than 10 °, the shoulder portion (2) with respect to the front surface (11), the back surface and the side surface (12) of the body portion (1).
Since the forming surface of the is close to an acute angle, the moldability is deteriorated, and moreover, in the upper projected corner portion (5) of the body portion (1) and the shoulder portion (2), the upper oblique rib (72) and the upper portion described later are formed. Horizontal rib (7
The virtual intersection of 3) is warped, and pinholes are likely to occur.

The inner volume of the container can be appropriately designed depending on the application, but is usually about 0.2 to 5 liters. Further, the wall thickness of the container (average wall thickness in the flat portion of the body portion (1)) is 0 in the case of the above internal volume in consideration of the required rigidity during use and the ease of deformation when crushed. 3-
It is set to 1.5 mm.

As shown in FIG. 1, the container of the present invention defines the shape when crushed and prevents the restoration after crushing, so that the vertical ribs (71), the upper oblique ribs (72), and the upper portion. The seven ribs of the horizontal rib (73), the lower oblique rib (74), the lower horizontal rib (75), the second upper horizontal rib (76), and the second lower horizontal rib (77) are attached to the body (1). ) Is prepared.

The vertical ribs (71) are ribs for bending the side surface (12) in a direction of protruding outward when the body portion (1) is crushed, and as shown in FIGS. 1 and 3, 50-70% of the height of the trunk (1) at the center of each of the two sides (12)
It is arranged with a length corresponding to. The length of the vertical ribs (71) is essentially the same as the upper oblique ribs (72) and the lower oblique ribs (7).
Although it is defined in relation to the inclination angle of 4), it can be set in the above range in a simple manner.

The reason for setting the length of the vertical rib (71) within the above range is as follows. Ie vertical ribs (71)
Is less than 50% of the height of the body (1), when the body (1) is crushed, below the shoulder (2) and the bottom (4).
A space is generated above the area and the volume cannot be reduced sufficiently. On the other hand, when the length of the vertical ribs (71) exceeds 70% of the height of the body (1), when the body (1) is crushed, the shoulder (2) and the bottom (4) are connected. The amount of overhang on the substantially horizontal surface is small, and the repulsive force is large, making it difficult to crush.

The upper oblique ribs (72) are vertical ribs (71).
Ribs for bending the side surface (12) in cooperation with the side surface (12), and a pair of ribs is provided on each side surface (12). The front surface (11), the back surface, the side surface (12), and the shoulder portion (2).
And extending from the vicinity of the upper end of each vertical rib (71) toward each upper projected corner (5). The upper oblique ribs (72) extend from the upper projecting corners (5) so that the upper portions of the side faces (12) protrude substantially horizontally from the shoulders (2) when the body (1) is crushed. Body (1) from the horizontal toward the center of (12)
Is extended at an angle of 30-45 ° to the lower part of In addition, in order to prevent pinholes during manufacturing, each upper diagonal rib (7
2) is provided in a state of being slightly separated from the upper ends of the vertical ribs (71).

The upper horizontal ribs (73) are vertical ribs (71) and upper oblique ribs (7) when the body (1) is crushed.
2) Ribs for cooperating with 2) to project the side surface (12) to the outside. As shown in FIGS. 1 and 3, each rib extends over the vicinity of the upper end of the pair of upper oblique ribs (72). Side (1
It is arranged at the upper end of 2).

The lower oblique ribs (74) are ribs having the same function as the upper oblique ribs (72), and a pair of ribs are provided on each side surface (12) and a front surface (11).
And extending from the vicinity of the lower ends of the vertical ribs (71) toward the lower corners (6) of the back surface, the side surface (12) and the bottom portion (4). The lower oblique ribs (74) extend from the lower corners (6) to the side surfaces (so that the lower portions of the side surfaces (12) protrude substantially horizontally from the bottom portions (4) when the body portion (1) is crushed. 12) toward the center of 12) from the horizontal direction to the upper part of the body (1) 30 to 45 °
Is stretched at an angle of. In addition, the upper skew rib (7
Similar to 2), in order to prevent pinholes during manufacturing, each lower oblique rib (74) is provided in a state slightly separated from the lower end of the vertical rib (71).

The lower horizontal ribs (75) have the same function as the upper horizontal ribs (73) described above, and as shown in FIGS. 1 and 3, the lower ends of the pair of lower oblique ribs (74). It is arranged at the lower end of each side surface (12) over the vicinity.

The second upper horizontal rib (76) has front (11) and side ((11)) sides of the body (1) so that the shoulder (2) relatively projects when the body (1) is crushed. It is a rib for bending the upper part of 12), and is a rib for preventing the flattened ridge line portion (8) from being restored after the body portion (1) is crushed. Such second upper horizontal ribs (76)
As shown in FIGS. 2 and 3, a vertical rib (71) is provided on each of the ridges (8) on the front surface (11) and the back surface and each side surface (12).
Is arranged at a height corresponding to the upper end position of the.

The second lower horizontal rib (77) has a function similar to that of the second upper horizontal rib (76). That is, the second lower horizontal ribs (77) are such that when the body (1) is crushed, the bottom (4) of the body (1) is relatively projected so that the front (11) and side (12) of the body (1). Is a rib for bending the lower part of the rib and a rib for preventing the flattened ridge line portion (8) from being restored after the body portion (1) is crushed. The second lower horizontal rib (77) is
It is arranged at a height corresponding to the lower end position of the vertical rib (71) with respect to each ridge (8).

The above-mentioned second upper horizontal rib (76) and second lower horizontal rib (77) are arranged so as to straddle the front (11) and side (12) of the body (1), respectively. Will be
The horizontal overhang length of the front face (11) and the side face (12) is about 1 of the width of the front face (11) and the side face (12).
The length is equivalent to / 4.

In a preferred embodiment of the present invention,
The vertical ribs (71), the upper oblique ribs (72), and the lower oblique ribs (74) have their cross-sections that are orthogonal to the longitudinal direction thereof protrude outward in order to ensure that the respective functions of the above-described seven kinds of ribs are exhibited. The upper horizontal rib (73) and the lower horizontal rib (75) are formed as protruding ribs having a shape, and are formed as grooved ribs having a shape in which a cross section orthogonal to the longitudinal direction thereof is recessed inward. Further, each of the second upper horizontal ribs (76) and the second lower horizontal ribs (77) is formed as a groove-shaped rib whose cross section orthogonal to the longitudinal direction is recessed inward.

As described above, the container of the present invention is made of high-density polyethylene having a specific density, and is provided with seven kinds of ribs each having a unique function. It can be crushed to. That is, in the container of the present invention, when the front surface (11) and the back surface are pressed to crush the body portion (1), each side surface (12) of the body portion (1) is
Bends along the vertical ribs (71), the upper diagonal ribs (72) and the lower diagonal ribs (74) into mountain folds, and along the upper horizontal ribs (73) and lower horizontal ribs (75) into valley folds. And the front (11), back and each side (12) of the body (1) along the second upper horizontal rib (76) and the second lower horizontal rib (77). It is designed to bend in a valley.

In other words, as shown in FIG. 4, in the container of the present invention, when the body portion (1) is crushed, the body portion (1) is bent along the seven kinds of ribs as described above, so that the body portion (1) is bent. Each side surface (12) of the part (1) projects outward, and the shoulder part (2) and the bottom part (4) project relatively to the body part (1) so that the front surface (11) and the back surface contact each other. Collapsed into a state. Therefore, the internal volume can be further reduced, and the volume reduction rate can be further increased.

In the crushed state, the second upper horizontal ribs (76) and the second lower horizontal ribs (77) are linearly extended, so that the flattened ridge portions (8) are formed. Can be surely prevented from being restored. Therefore, the container of the present invention can hold the crushed state after being crushed once, and it is not necessary to seal the mouth portion (3) with the lid. In addition, in the container of the present invention, it is also possible to apply an in-mold label in which a label inserted in a blow molding die is attached at the time of blow molding.

[0028]

As described above, according to the synthetic resin container of the present invention, the container is made of high-density polyethylene having a specific density and has seven specific ribs. Since it is crushed into a state of contacting, it is possible to further reduce the internal volume and further increase the volume reduction rate. Moreover, in the crushed state, the functions of the second upper horizontal ribs and the second lower horizontal ribs can reliably prevent the ridges of the flattened body from being restored.

[Brief description of drawings]

FIG. 1 is a perspective view showing the appearance of a synthetic resin container according to the present invention.

FIG. 2 is a top view and a front view showing the appearance of a synthetic resin container according to the present invention.

FIG. 3 is a side view showing the appearance of a synthetic resin container according to the present invention.

FIG. 4 is a view showing a crushed state of a synthetic resin container according to the present invention.

[Explanation of symbols]

1: Body 11: front 12: Side 2: Shoulder 3: Mouth 4: bottom 5: Upper protruding corner 6: Lower protruding corner 71: Vertical rib 72: Upper oblique rib 73: Upper horizontal rib 74: Lower oblique rib 75: Lower horizontal rib 76: Second upper horizontal rib 77: Second lower horizontal rib 8: Ridge

Claims (3)

[Claims] 1. A crushable synthetic resin container made of high-density polyethylene having a density of 0.945 to 0.968, and having a vertically long body section having a horizontal cross section of a substantially square shape or a substantially rectangular shape. (1), a mouth portion (3) provided on the upper end side of the body portion (1) via the shoulder portion (2), and seven kinds of ribs provided on the body portion (1), The seed ribs are longitudinal ribs (7) arranged at the center of each of the two side faces (12) with a length corresponding to 50 to 70% of the height of the body (1).
1) and the vertical ribs (7) toward the upper projected corners (5) of the front face (11) and the back face, the side faces (12) and the shoulders (2).
1) A pair of upper oblique ribs (72) extended from the vicinity of the upper end of the pair of upper horizontal horizontal ribs arranged on the upper ends of the side surfaces (12) near the upper ends of the pair of upper oblique ribs (72). A pair of ribs (73) extending from the vicinity of the lower end of each vertical rib (71) toward the lower corners (6) of the front face (11), the back face, the side face (12), and the bottom portion (4). Lower oblique ribs (74), lower horizontal ribs (75) arranged at the lower ends of the side surfaces (12) over the lower ends of the pair of lower oblique ribs (74), the front surface (11) and Back and sides (1
Second upper horizontal rib (76) arranged at a height corresponding to the upper end position of the vertical rib (71) on each ridge (8) with
And a second lower horizontal rib (77) arranged at each ridge (8) at a height corresponding to the lower end position of the vertical rib (71), a synthetic resin container. 2. The synthetic resin container according to claim 1, wherein the inclination angle of the shoulder portion (2) extending from the upper end side of the body portion (1) to the base portion of the mouth portion (3) is 10 to 40 °. 3. Vertical ribs (71), upper oblique ribs (72)
The lower oblique ribs (74) are projecting ribs whose cross-sections orthogonal to the longitudinal direction of the lower horizontal ribs (74) project outward, and include upper horizontal ribs (73), lower horizontal ribs (75), and second upper horizontal ribs (75). The rib (76) and the second lower horizontal rib (77) are
The synthetic resin container according to claim 1 or 2, which is a groove-shaped rib having a shape in which a cross section orthogonal to the longitudinal direction is recessed inward.