JP5286769B2 - Water purifier - Google Patents

Description

The present invention relates to a water purifier using a plastic container.

In recent years, plastic containers have been widely used as containers for containing beverages and solids. A plastic container has many advantages such as light weight and excellent moldability as compared with other glass containers and metal containers, but conventionally, a thin-walled container has a problem of poor mechanical strength. In particular, when the contents are stored in a plastic container, the weight of the container increases. Therefore, if the container falls while the contents are stored, the container may be damaged. For such a problem, Patent Document 1 discloses a technique for adjusting the radius of curvature of the container inner lower corner as shown in FIG. 4A to increase the strength. Patent Document 2 discloses a technique for increasing the drop strength by adjusting the cross-sectional shape of the container bottom 41 as shown in FIG. 4B.
JP-A-10-264922 JP 2006-315726 A

  However, according to the knowledge of the present inventors, by changing the thickness and shape of the container inner lower corner to improve the impact resistance of the corner portion, or by adjusting the cross-sectional shape of the container bottom portion, the bottom surface portion and the side surface The technology such as improving the strength of the rib-like convex portion provided downward toward the outside of the bottom surface portion of the container at the lower corner formed by the portion, when a crack occurs in the lower part of the container including the rib-like convex portion, There was a case where the housing part such as the bottom part or the side part of the container was cracked.

  According to the knowledge of the present inventors, this is due to the fact that when the container is dropped, the load applied to the tip of the rib-like convex portion that is first grounded is directly transmitted to the bottom surface portion and the side surface portion of the container. In other words, if the container bottom and side parts have the same strength as the rib-like convex part or less strength than the rib-like convex part, the load due to impact reaches the container bottom part and side part via the plastic part. At least one of the bottom surface portion and the side surface portion is very easily broken. In particular, stress tends to be concentrated at the inner lower corner of the container, and is greatly affected by a load caused by a drop transmitted from the tip of the rib-shaped convex portion, and is easily cracked. For example, FIG. 5A shows an example of the propagation direction of the load due to the impact at the time of dropping in the case of the container lower part shape described in Patent Document 1 shown in FIG. 4A. The load caused by the impact transmitted from the lower outer tip of the convex portion is also transmitted to the lower inner corner of the container as indicated by the arrow in the figure. FIG. 5B shows an example of the propagation direction of a load due to an impact at the time of dropping in the case of the container lower part shape described in Patent Document 2 shown in FIG. 4B. The load due to the impact transmitted from the lower outer tip of the convex portion is also transmitted to the lower inner corner portion of the container as indicated by the arrow in the figure.

  The objective of this invention is providing the container shape which solves the said problem.

In order to achieve the above object, the water purifier of the present invention has the following configuration.

According to the onset bright, and side portions, and a bottom portion that is joined to the said side surface portion to form a container lower corners, arranged downward in the vessel outside of at least a portion of the lower of the container lower corner rib In the longitudinal section of the plastic container, a line segment connecting the end point outside the lower end of the rib-like convex part and the container lower corner is a lower outline of the bottom part and the rib-like shape. It includes at least one installation auxiliary convex portion that is configured to intersect with the inner side surface outline of the convex portion and extends downward from the bottom surface portion on the inner side in the horizontal direction than the rib-shaped convex portion. A water purifier using a plastic container in which the thickness d1 and the thickness d5 of the installation auxiliary convex portion satisfy d5> d1 is provided.
Moreover, according to the preferable form of this invention, the said bottom face part is a polygon, The water purifier by which the said rib-shaped convex part is provided in at least one part of the corner | angular part of the said polygon is provided.
Moreover, according to the preferable form of this invention, the water purifier by which the said rib-shaped convex part is provided over the perimeter of the said bottom face part is provided.

"Rib-like protrusions" in the present invention include, for example, may be shaped as shown in FIG. 3 A. Figure 3 A is shows a longitudinal sectional view of the lower plastic containers, the convex portion to the shape of the rib downwardly in the container bottom portion outside the container lower corner formed by the bottom and side portions Is provided.

  In the present invention, “the thickness of the rib-like convex portion” refers to the thickness of the rib-like convex portion in the horizontal direction in the longitudinal section of the container.

  In the present invention, the “thickness of the side surface portion” refers to the horizontal thickness of the side surface portion of the container in the longitudinal section of the container. When the thickness of the rib-shaped convex portion varies depending on the rib-shaped convex portion, it means the thickness of the rib-shaped convex portion having the smallest thickness.

  In the present invention, the “thickness of the bottom surface portion” refers to the thickness in the vertical direction of the bottom surface portion in the longitudinal section of the container.

"Container lower corner which is formed by joining the side surface portion and a bottom portion" in the present invention include, for example, in the shape as shown in Figure 3 A, a place indicated by the corners X.

  ADVANTAGE OF THE INVENTION According to this invention, the plastic container which is excellent in impact resistance with respect to impacts, such as a fall, and can prevent a container part failure | damage can be obtained.

Hereinafter, the example of the best embodiment of the present invention will be described with reference to the drawings, taking as an example the case of applying to a plastic container in a water purifier. Drawings showing examples of embodiments of the present invention are FIGS. 1, 3A, 3B, 3C, 6, 7, 7, 8A, 8C, and 9, and other drawings are embodiments of the present invention. It does not indicate a form.

  Note that the present invention is not limited to the embodiments described below, and may be anything that can achieve the object of the present invention.

FIG. 1 shows a schematic view of the water purifier of the present embodiment. As shown in FIG. 1, the water purifier of the present embodiment includes a lid 1, a water receiver 2, a cartridge 3, and a container 4. The cartridge 3 can be easily attached to and detached from the water receiving portion 2 and is used in a state of being inserted into the water receiving portion 2. Moreover, the water receiving part 2 is fitted to the container 4 at the upper part, and the lower part of the container 4 is in a state in which the accommodating part 5 in which liquid or the like is accommodated is maintained as a space. The lid 1 is located above the water receiver 2 and the container 4. The cartridge 3 contains a filter medium such as activated carbon.

  In the state of FIG. 1, when tap water is put into the water receiving portion 2, the tap water passes through the cartridge 3 with its own weight, and at that time, free residual chlorine and the like are removed, and the accommodating portion 5 located below the container 4 as purified water. Accumulate.

  The container 4 is a container having a rib-like convex portion, and is preferably a resin molded product such as polypropylene, acrylonitrile styrene, polystyrene, polycarbonate, acrylic, polyethylene, acrylonitrile butadiene styrene, or high impact polystyrene. In particular, acrylonitrile styrene and high impact polystyrene are preferable as plastic containers for water purifiers because of their excellent impact resistance, transparency, and heat resistance.

  Next, the best form of the container lower shape will be described.

FIG. 2A is a cross-sectional view in a vertical cross section below a plastic container showing an embodiment of the prior art . FIG. 2B is a bottom view of the plastic container showing an embodiment of the prior art . FIG. 2C is a bottom view of a plastic container showing another embodiment of the prior art . FIG. 3A is a cross-sectional view in a longitudinal section below a plastic container showing an embodiment of the present invention. FIG. 3B is a bottom view of a plastic container showing an embodiment of the present invention. FIG. 3C is a bottom view of a plastic container showing another embodiment of the present invention.

In the shape of the present embodiment, as shown in FIG. 6 (for the sake of explanation, the installation auxiliary convex portion is omitted and not shown) , the end point Y on the lower outer side of the rib-shaped convex portion and the lower inner corner X of the plastic container are The connecting line segment XY intersects the lower outline α of the bottom surface portion and the outline β of the inner surface of the rib-like convex portion. The load applied to the end Y on the lower outer side of the rib-like convex portion is transmitted through the plastic portion when dropped, but in this shape, the line segment XY does not pass only inside the plastic. That is, the load applied to the end Y on the lower outer side of the rib-like convex portion when dropped is not directly transmitted to the accommodating portion corner, that is, the lower inner corner X of the container, and the container can be prevented from being damaged.

d3> d1 + d2
Further, in FIG. 7 (for the sake of explanation, the installation auxiliary convex portion is omitted and not shown) , the impact load dropped from the end point Y on the lower outer side of the rib-shaped convex portion is not directly applied to the lower inner corner X of the container. Is an angle θ formed by a line segment X-Z connecting the intersection Z between the rib-shaped convex portion inner side and the bottom surface portion outer side and the lower inner corner X of the container, with reference to a line γ downward in the vertical direction from the lower inner corner X of the container. Is preferably larger than the angle θ ′ formed by the reference line γ and the line segment XY. That is, a shape satisfying the following formula is good.

tan θ> tan θ '

Also, if the chamfering or corner radius processed into Li Bed convex portion is subjected to a thickness of the lower end of the rib-like protrusions and the thickness of the rib-like protrusions. When the thickness of the rib-like convex portion varies depending on the rib, it is preferable to consider the thickness of the thinnest rib-like convex portion.

If there is a rounded or chamfered shape on the side surface outside the lower end, it is preferable to consider the upper end of the side surface rounded or chamfered shape with the side portion outer bottom.

Also, it is to consider a point of intersection of the line segment and Earl connecting the center point O and the rib-shaped convex portion below the outer end Y of the radius and the container inner corner X if there is a rounded inside corner. When the inner corner has a chamfered shape, the intersection of the inner side surface of the container and the chamfer should be considered as the container inner corner.

  In the present invention, the “installation auxiliary convex portion” may have a shape as shown in FIG. 3A, for example. FIG. 3A shows a vertical cross-sectional view below the plastic container, wherein at least one installation auxiliary convex portion extending downward from the bottom surface portion is provided on the inner side in the horizontal direction than the rib-shaped convex portion. The purpose is to form the ground contact surface when the is placed.

Explaining a difference in fracture mechanism with reference to FIG. 8 B showing the FIG. 8 A and the conventional embodiment showing an embodiment of the present invention.

Figure 8 A and Figure 8 B is the thickness a1 of the thickness d3 and the bottom portion of the container side portion is the same, the presence or absence of shape and the rib-like protrusions inner rib of the rib-like protrusions and differences. The landing situation where Figure 8 A and Figure 8 B has fallen inclined shown in FIG. 8 C and Figure 8 D. The load due to the impact of the drop is transmitted to the plastic container vertically upward from the grounding point of the rib-like convex portion, that is, the end Y on the lower side of the rib-like convex portion as indicated by an arrow at the moment of dropping. Since the load transmitted through the plastic container, as shown in FIG. 8 D, the point X is easily susceptible state becomes the container lower corner X Introduction vessel side portion and the container side portion is cracked the influence of load due to the impact of the fall. On the other hand, FIG. 8 C illustrates an embodiment of the present invention, since the falling ground point Y and the inner corner X is not connected directly with plastic, the load due to the impact of the drop will not directly affect the internal corners X of the container .

  Next, how the rib-like convex part is configured in the bottom part will be described.

Figure 3 B is a bottom view of the plastic container showing an embodiment of the present invention. The container bottom view of FIG. 3 B rib-like protrusions are in the corners of the polygon. In the case where the container bottom is a polygon, if the container is dropped, there is a high possibility of grounding from the corner of the polygon. Therefore, when the rib-like convex portions are at the corners of the polygon, it is possible to obtain an effect of preventing the container from being damaged by the higher rib-like convex portions. This rib-shaped convex part does not need to exist in all the corner | angular parts, and should just exist in at least one part of corner | angular part. The same applies to other embodiments.

Figure 3 C is a bottom view of the plastic container showing another embodiment of the present invention. As shown in FIG. 3 C, the rib-like projections when present all around the bottom portion, the container is a container breakage by rib-like protrusions may have a ground from the side rather than the corners of the polygonal bottom section A prevention effect can be obtained, which is preferable.

  FIG. 3A is a cross-sectional view in a longitudinal section below a plastic container showing an embodiment of the present invention. As shown in FIG.3A, when there is an installation auxiliary convex portion extending downward from the bottom surface portion of the container on the inner side in the horizontal direction from the rib-shaped convex portion, when the container is dropped and cracking or chipping of the rib-shaped convex portion occurs, In the shape of FIG. 2A, when the container is placed, the container is inclined and unstable. However, if there is an installation auxiliary convex part in addition to the rib-shaped convex part, the container drops even when the rib-shaped convex part is broken and shortened. The previous stable state can be maintained. In addition, when the installation auxiliary convex part is inside the rib-shaped convex part as shown in FIG. 3A, the possibility that the installation auxiliary convex part is cracked and shortened becomes very low, and the container is stable even if the container is dropped repeatedly. You can continue to put in the state. Since the installation auxiliary convex part prevents the inclination of the container when the container is installed before and after breakage of the rib-shaped convex part, it is preferably the same length as the rib-shaped convex part. It is desirable that both the convex portion and the installation auxiliary convex portion are grounded.

Also, when installing the auxiliary protrusions on the inside of the rib-shaped convex portion is as shown in FIG. 3B, FIG. 3C, containers can be continued stably put in a state state longer, can be obtained a longer effect of the ribs It becomes.

In FIG. 9, the thickness d1 of the rib-like convex portion and the thickness d5 of the installation auxiliary convex portion inside the rib-like convex portion have the following relationship.

d5> d1
If comprised as mentioned above, the intensity | strength of an installation auxiliary | assistant convex part will become higher than the intensity | strength of a rib-shaped convex part. Therefore, the effect of preventing the container damage due to the drop load due to the damage of the rib-shaped convex part and the effect of placing the container in a stable state even after the rib-shaped convex part is damaged by the installation auxiliary convex part inside the rib-shaped convex part are more reliable. Can be obtained simultaneously.

  FIG. 1 uses a plastic container to which this embodiment is applied as a water purifier. The water purifier has a large number of parts and is more expensive than a plastic container intended only to contain liquid, so it is desirable that it can be used for a long time. It is preferable to use a plastic container to which the embodiment is applied.

Hereinafter, the present embodiment will be described in more detail by way of examples, but the scope of the present invention is not limited by these examples.
[Example 1]
As a resin constituting the plastic container, acrylonitrile styrene (AS) resin (manufactured by Asahi Kasei Chemicals) was used. A plastic container having a shape to which this embodiment shown in FIG. 9 was applied was produced by injection molding of this resin. The dimensions of the obtained container are shown in Table 1.

Using the characteristics of plastic containers that are easily damaged in low temperature environments obtained by injection molding, leave the resulting container in an ambient temperature of -10 ° C or lower for 5 hours or more in an empty state, leaving only the container empty. The strength of the plastic was evaluated by a forced test that immediately dropped onto the concrete from a height of 1 m. After dropping, the container returned to room temperature, and then water was poured into the container, and it was confirmed whether water had leaked from the side or bottom of the housing. Such an operation was repeated up to 20 times, and it was confirmed how many times the water leak occurred. Note that the initial posture of the container when dropped was the position where the bottom surface of the container was horizontal to the concrete surface. The results are shown in Table 2. Even if the number of samples (hereinafter referred to as N) was three and all dropped 20 times of the maximum number of drops, no water leakage occurred.
[Comparative Example 1]
A conventional plastic container shown in FIG. 10 was produced in the same manner as in Example 1 except for the thickness and length of the rib-shaped convex portion. In other words, there is a high possibility that the drop load applied to re blanking convex portion is applied directly to the bottom part. The dimensions of the obtained container are shown in Table 1.

The same test as in Example 1 was performed using the obtained container. The results are shown in Table 2. At N = 3, water leakage was confirmed by a total of 10 or fewer drops.
[Comparative Example 2]
Has a rib-shaped convex portion and the rib, the line segments X-Y passes through only plastic part, was evaluated in the same manner as in Example 1 for plastic containers of the prior shape shown in FIG. 11. The same AS resin as in Example 1 was used as the resin. The dimensions are shown in Table 1. The results are shown in Table 2. At N = 3, one was estimated to be the effect of the rib-shaped convex portion and the number of drops was 20 times or more, but two were confirmed to have water leakage after 10 times or less as in Comparative Example 1.
[Comparative Example 3]
Using the same resin as in Example 1, the containers without the rib-shaped convex portion shown in FIG. 12 were evaluated in the same manner as in Example 1. The same AS resin as in Example 1 was used as the resin. The dimensions are shown in Table 1. The results are shown in Table 2. At N = 3, water leakage was confirmed after a total of 5 or fewer drops.

  The present invention can be applied not only to water purifiers, but also to pots for tea and water, sealed containers for foods, and small items, but the application range is not limited to these.

The schematic of the plastic container of this embodiment is shown. It is a schematic sectional drawing in the plastic container longitudinal cross-section which shows one Embodiment of a prior art . It is a bottom view of the plastic container which shows one Embodiment of a prior art . It is a bottom view of the plastic container which shows one Embodiment of a prior art . It is a schematic sectional drawing in the longitudinal section below the plastic container which shows one Embodiment of this invention. It is a bottom view of the plastic container which shows one Embodiment of this invention. It is a bottom view of the plastic container which shows one Embodiment of this invention. It is a schematic sectional drawing in the longitudinal section below the plastic container which shows one Embodiment of a prior art. It is a schematic sectional drawing in the longitudinal section below the plastic container which shows one Embodiment of a prior art. It is a schematic sectional drawing in the longitudinal cross-section below the plastic container which shows the form of the destruction mode in FIG. 4A. It is a schematic sectional drawing in the longitudinal section below a plastic container which shows the form of the destruction mode in Drawing 4B. You have not shown an installation aid protrusions of the plastic container lower illustrating one embodiment of the present invention is an explanatory schematic cross-sectional view in longitudinal section. You have not shown an installation aid protrusions of the plastic container lower illustrating one embodiment of the present invention is an explanatory schematic cross-sectional view in longitudinal section. It is a schematic sectional drawing in the longitudinal section below the plastic container which shows one Embodiment of this invention. It is a schematic sectional drawing in the longitudinal section below the plastic container which shows one Embodiment of a prior art. It is a schematic cross-sectional view in longitudinal section of the plastic container downward showing the form of a failure mode in FIG 8 A. It is a schematic sectional drawing in the longitudinal section below a plastic container which shows the form of the destruction mode in Drawing 8B . It is a schematic sectional drawing in the longitudinal section below the plastic container which shows one Embodiment of this invention. It is a schematic sectional drawing in the longitudinal section below the plastic container which shows one Embodiment of a prior art. It is a schematic sectional drawing in the longitudinal section below the plastic container which shows one Embodiment of a prior art. It is a schematic sectional drawing in the longitudinal section below the plastic container which shows one Embodiment of a prior art.

Explanation of symbols

1: Lid 2: Water receiving part 3: Cartridge 4: Container 5: Storage part 41: Container bottom part 42 of conventional technology product: Container side surface part 43 of conventional technology product: Rib-shaped convex part 51 of conventional technology product: Conventional technology Container bottom part 52 of product: Side wall part 53 of conventional product: Rib-shaped convex part d1 of conventional product: Thickness of rib-shaped convex part d2: Distance between side surface and rib side surface d3: Thickness of side part
d4: horizontal length from the inner side lower end of the side surface part to the container inner lower corner
d5: Thickness L1 of the auxiliary installation convex portion L1: Length from the ground contact surface to the lower end of the side surface portion L2: Length from the ground contact surface to the outside of the bottom surface portion a1: Thickness of the bottom surface portion X: Lower corner Y inside the container: Rib shape End Z below the convex outer side: Crossing point O between the rib-shaped convex inner side and the bottom side outer side O: Center point α of the lower corner radius inside the container β: Line β indicating the outer side of the bottom part in the container lower sectional view: Container lower sectional view A line γ indicating the inner side surface of the rib-like convex portion in FIG. 6: A line θ vertically dropped from the point X in the container lower cross-sectional view θ: an acute angle formed by the line γ and the line segment XZ θ ′: a line γ and the line segment X− The acute angle formed by Y

Claims (3)

A plastic having a side surface, a bottom surface joined to the side surface to form a container lower corner, and a rib-like convex portion provided downward toward the outside of the container below at least a part of the container lower corner. In the longitudinal section of the plastic container, a line segment connecting an end point outside the lower end of the rib-like convex portion and a container lower corner is a lower outline of the bottom portion and an inner side outline of the rib-like convex portion And at least one installation auxiliary convex portion extending downward from the bottom surface portion on the inner side in the horizontal direction than the rib-shaped convex portion, and further , the thickness d1 of the rib-shaped convex portion and the installation auxiliary convex portion water purification unit characterized in that the thickness of the part d5 is a plastic container which satisfies the d5> d1. The water purifier according to claim 1, wherein the bottom surface portion is a polygon, and the rib-shaped convex portion is provided on at least a part of a corner portion of the polygon. The water purifier according to claim 1, wherein the rib-shaped convex portion is provided over the entire circumference of the bottom surface portion.

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