JP2599474Y2 - Synthetic resin container - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a synthetic resin container and can be used as a waste container for collecting and storing waste such as waste oil, waste acid, or medical waste.

[0002]

2. Description of the Related Art Conventionally, in order to collect and store waste such as waste oil, waste acid, and medical waste, a container having a main body and a lid has been manufactured using a synthetic resin such as polyethylene or polypropylene. Such waste containers are:
Since storage and transportation are often performed in a state where a plurality of containers are stacked, the containers are required to have strength capable of coping with long-term storage and stability during stacking.

[0003] That is, the waste container may be stored in a state where the contents are stored for a long period of time, such as one month, and in this case, the lid may buckle or crack. For this reason, in order to prevent the buckling or cracking of the lid, a method of increasing the thickness of the lid or increasing the rigidity of the material of the lid has been adopted.

[0004] Further, when carrying the containers in a stacked state, the containers may be displaced due to the vibration of the transporting vehicle and fall over, or even during storage due to the inclination of the storage place or an earthquake. A similar problem may occur. For this reason, the applicant of the present application has already filed
No. 56 has devised a container that takes into account the stability during stacking. The container described in Japanese Utility Model Application No. 4-015256 has a convex portion at the center on the front side of the lid and a concave portion at the center of the bottom surface of the main body. Then, the convex portion on the front side of the lid and the convex portion on the bottom surface of the main body of another synthetic resin container stacked on the upper side of the lid are fitted to each other to secure the stability at the time of stacking the containers.

[0005]

[Problems to be solved by the present invention] However, regarding the problem of securing the stacking strength, as described above, when a method such as increasing the thickness of the lid or increasing the rigidity of the material of the lid is adopted, Although the required strength can be obtained, there is a problem that the lid is difficult to close, the material cost is increased and the production cost of the container is increased, or the handling is not easy due to an increase in the container weight.

Further, with respect to the stability at the time of stacking, a certain degree of stability can be ensured by using the container described in the aforementioned Japanese Patent Application No. 4-015256. However, there still remains a possibility that the container may be displaced and fall over, and more reliable stability has been required.

An object of the present invention is to provide a synthetic resin container which is excellent in stacking strength and stability during stacking and can easily open and close a lid.

[0008]

According to the present invention, a reinforcing rib is provided on the back side of the peripheral portion of the lid to secure the stacking strength, and the inner convex portion and the outer portion sandwiching the peripheral convex portion on the bottom surface of the main body on the front side of the lid.
The object is to achieve the above object by forming a convex portion to secure stability during stacking. Specifically, the present invention is a substantially polygonal column-shaped synthetic resin container including a main body having an opening and a lid covering the opening, wherein the lid is substantially parallel to an opening surface of the opening. A top surface of a substantially polygonal shape, and a side surface connected to the periphery of the top surface and intersecting with the top surface. Reinforcing ribs are provided, and these reinforcing ribs radiate substantially around the center of the lid.
While being disposed Jo, is connected so as to intersect the upper surface portion and the side portion, and is the thickness of less than the thickness of the upper surface portion, the front side of the lid, the upper side of the lid
Around the bottom surface of the main body of another synthetic resin container
Inside the unit that sandwiches the peripheral protrusion provided in the part
Side protrusions and outer protrusions are formed, and the outer protrusions are
It is characterized by being arranged so as to intersect several strong ribs . Further, the synthetic resin container of the present invention is characterized in that each of the reinforcing ribs has a substantially triangular shape with one side thereof connected to the upper surface and the other side connected to the side surface. I do.

In the synthetic resin container according to the present invention, the inner convex portion disposed on the front side of the lid is fitted with the concave portion on the bottom surface of the main body of another synthetic resin container stacked on the lid.
It is characterized by being formed in a possible shape . Furthermore, the synthetic resin container of the present invention is provided on the outside of the side surface of the lid.
Is formed with a curved portion that fits with the periphery of the opening of the main body,
It is characterized in that a packing is accommodated in the curved portion .

[0010]

In the present invention, when the containers are stacked and stored for a long period of time with the contents stored in the containers,
Since a plurality of reinforcing ribs are provided on the back side of the periphery of the lid of the container, the lid does not buckle or crack, and the stacking strength of the container is ensured. Further, since the stacking strength of the container is ensured by the reinforcing ribs, opening and closing of the lid becomes easier compared to the conventional case where the thickness of the lid and the rigidity of the material of the lid are increased to ensure the stacking strength. In particular, the container of the present invention
Is formed in a substantially polygonal column shape, and the lid is
Shape and appropriate only for each corner of the lid
With a sufficient number of reinforcing ribs, less material
A large reinforcing effect can be obtained, and the stacking strength of the lid
Can secure enough and reduce manufacturing cost
it can. In addition, the thickness of the reinforcing rib is the thickness of the top part of the lid.
Since it is as follows, the reinforcing ribs of the upper surface
Sinking can be prevented from occurring at the connected portion.

[0011] Since these reinforcing ribs are arranged substantially radially around the vicinity of the center of the lid, the flow of the resin supplied from one point gate at the time of molding of the container is improved. Also, on the front side of the lid, stacked on top of this lid
Provided on the periphery of the bottom of the main body of another synthetic resin container
Inner convex part and outer part arranged so as to sandwich the peripheral convex part
Side projections are formed, and the outer projections are several reinforcement ribs.
Are arranged so as to intersect with
Stacking strength of containers with reinforcing ribs while ensuring qualitative
Can be increased. That is, formed on the front side of the lid
The outer ridge is another synthetic tree stacked on top of this lid
In addition to the function of positioning the main body of the fat container, reinforcement
It is complemented by being arranged to cross several ribs.
Since the rigidity of the strong ribs can be increased,
Stacking of containers with reinforcing ribs while ensuring stability at the time
The spring strength can be further increased. Furthermore, in general, if the depth (height) of the rib is too large, it is difficult to release the mold from the mold after molding. However, if each of these reinforcing ribs has a substantially triangular shape, the required strength of the lid is secured. In addition, the depth of the rib can be reduced, and the mold can be easily released from the mold.

[0012] Further, the inner convex portion arranged on the front side of the lid is
By forming a recess shape to be fitted to the bottom panel of another synthetic resin container to be stacked on the upper side of the lid, or landscape
Hard to shift against these forces, and more stable when stacked
Can be improved. Also, on the outside of the side of the lid
A curved portion that fits with the periphery of the opening of the
If packing is stored in the container, the airtightness of the container can be improved.
Especially in waste oils and acids, or medical
It is suitable as a container for industrial waste.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the entire configuration of the container 10 according to the present embodiment with the lid 30 opened. Also, FIG.
3 is a partial plan view of the lid 30 viewed from the back side, and FIG. 4 is a view showing the bottom surface of the main body 20. 1 and 2, a container 10 made of synthetic resin is used.
Is a substantially rectangular parallelepiped body 20 having an opening 21 on the upper surface,
A cover 30 for closing the opening 21 of the main body 20 is provided.

The main body 20 has a substantially rectangular bottom portion 22 and a side plate portion 23 rising upward from the periphery of the bottom portion 22. The lid 30 has a substantially rectangular upper surface portion 31 arranged in parallel with the opening surface of the opening portion 21 (the upper surface of the main body 20), and a side surface portion 32 connected to the periphery of the upper surface portion 31 and intersecting with the upper surface portion 31. And a curved portion 33 having a substantially inverted U-shaped cross section provided outside the side surface portion 32.

The upper edge of the side plate 23 of the main body 20, ie, the opening
A hook-like portion 24 protruding outward (left side in FIG. 2) is provided on the periphery of 21, while an edge of the curved portion 33 of the lid 30 is directed inward (right side in FIG. 2). Projecting locking step 34
Is provided. Then, as shown in FIG. 2, the locking step 34 is hooked on the hook
It is designed to be fixedly locked to 20. In addition, bending section 33
Inside, a packing 35 is provided, and when the lid 30 is closed, the hook-shaped portion 24 of the main body 20 is pressed against the packing 35, so that when the lid 30 is closed. Of the container 10 is secured.

A flange 25 projecting outward is provided over the entire periphery of the side plate 23 on the upper side of the side plate 23 of the main body 20. The user can carry the container 10 by hand on the flange 25. I can do it. Further, as shown in FIG. 1, the flange 25 is provided with a hole 26 into which a locking portion 36 provided outside the curved portion 33 of the lid 30 can be inserted. By inserting the locking portion 36 in the direction of the arrow P, the main body 20 can be held in a state where the lid 30 is kept open.

In FIGS. 2 and 3, each of the four corners (near a rectangular corner) 37 of the lid 30 is provided with five reinforcing ribs 40 on the back side. This reinforcing rib 40
It has a substantially triangular shape, one side of which is connected to the upper surface 31 and the other side of which is connected to the side surface 32. The five reinforcing ribs 40 are arranged substantially radially around the center of the lid 30. The thickness of each reinforcing rib 40 is equal to or less than the thickness of the upper surface portion 31 of the lid 30.

At the center of the upper surface portion 31 of the lid 30, an inner protruding portion 50 protruding to the outside of the container 10 is provided. Each of the four corner portions 37 of the lid 30 is provided with a substantially L-shaped outer convex portion 51 protruding to the outside of the container 10, that is,
Outer convex so as to cross several ribs (three in the figure)
The portions 51 are arranged in an L-shape, and these outer convex portions 51
Has a semi-cylindrical cross section. On the other hand, as shown in FIG. 2 and FIG.
A concave portion 52 is provided on the inner side of the container 10. Lid 30
The inner convex portion 50 provided on the main body 20 is provided with a concave portion 52 provided on the main body 20.
The inner convex portion 50 and the concave portion 52 are fitted to each other when the containers 10 are stacked up and down. Further, since the concave portion 52 is provided at the center of the bottom portion 22 of the main body 20, a peripheral convex portion 53 projecting to the outside of the container is formed around the concave portion 52. When the containers 10 are stacked up and down, the peripheral convex portion 53 of the main body 20 has an inner convex portion 50 and an outer convex portion 51 provided on the lid 30.
And it is to be sandwiched between.

According to this embodiment, the following effects can be obtained. That is, since the reinforcing ribs 40 are provided on the back side of the periphery of the lid 30 of the container 10, buckling and cracking of the lid 30 that occurs when the containers 10 are stacked for a long period of time can be prevented. Further, since the stacking strength of the container 10 is ensured by the reinforcing ribs 40, the opening and closing of the cover 30 is easily performed as compared with the conventional case where the stacking strength is secured by increasing the thickness of the cover and the rigidity of the material of the cover. be able to.

Furthermore, since the reinforcing ribs 40 are arranged substantially radially around the center of the lid 30, the flow of the resin supplied from the one-point gate during the molding of the container 10 can be improved. Generally, if the depth (height) of the rib is too large, it is difficult to release the rib from the mold after molding. However, each of these reinforcing ribs 40 has a substantially triangular shape,
Since the maximum depth is kept within the height of the side surface portion 32 of the lid 30, the required strength of the lid 30 can be ensured and the rib depth can be kept small, so that the rib 30 can be separated from the mold after molding. Molding can be done easily.

Further, since the reinforcing ribs 40 have a substantially triangular shape, when the lids 30 are stacked as shown in FIG. 5, the reinforcing ribs 40 provided on the upper lid 30 and the lower lids 30 provided on the lower lid 30 are stacked. Interference can be prevented. Furthermore, since the thickness of the reinforcing ribs 40 is equal to or less than the thickness of the upper surface portion 31 of the lid 30, a sink mark phenomenon in which the surface side of the upper surface portion 31 of the lid 30 where the reinforcing ribs 40 are connected is depressed appears. Never.

Since the container 10 of this embodiment has a substantially rectangular parallelepiped shape, it is only necessary to provide an appropriate number (here, five) of reinforcing ribs 40 at each of the four corner portions 37 of the lid 30. Therefore, since the stacking strength of the lid 30 can be sufficiently ensured, a large reinforcing effect can be obtained with a small amount of material, and the manufacturing cost can be reduced.

When the containers 10 are stacked up and down,
In addition to the fitting of the concave portion 52 of the main body 20 and the inner convex portion 50 of the lid 30, the peripheral convex portion 53 of the main body 20 is sandwiched between the inner convex portion 50 and the outer convex portion 51 provided on the lid 30. Because it has become
The stability at the time of stacking the containers 10 can be further improved, and inconvenience such as overturning due to a load shift of the containers 10 during transportation or the like can be prevented. Further, since the outer convex portion 51 provided on the lid 30 has a substantially L shape,
The corners of the peripheral projections 53 provided on the front side can be securely locked on two surfaces, and the function of preventing a load shift can be obtained more reliably. Further, since the cross-sectional shape of the outer convex portion 51 is a semi-cylindrical shape, the containers 10 can be easily stacked and detached by hand.

Further, since the packing 35 is provided inside the curved portion 33, the container 10 can be securely sealed when the lid 30 is closed, and the contents can be leaked even when the container 10 falls down. Can be prevented. Further, by inserting the locking portion 36 of the lid 30 into the hole 26 of the main body 20, the lid 30 can be held by the main body 20 in a state where the lid 30 is opened. 30 can be prevented from being lost.

In order to confirm the effect of the present invention, the following comparative experiment was conducted. Using a substantially rectangular parallelepiped container as in the above embodiment, the maximum stress applied to the lid when the containers are stacked in three stages under various conditions with the number of reinforcing ribs and the thickness of the lid changed by the finite element method. I asked. The total load when stacking three is 50 kgf. Experimental examples 1 to 3 in which reinforcing ribs were provided on the back side of the lid were prepared as experimental examples of the examples, while Comparative Examples 1 to 3 without reinforcing ribs were prepared as comparative examples. In Experimental Example 1, five (20 in total) reinforcing ribs were provided at each of the four corners of the rectangular lid, and the thickness of the lid was 2.0 mm, which is the basic thickness. In Experimental Example 2, four (for a total of 16) reinforcing ribs were provided at each of the four corners of the rectangular lid, and the lid had a basic thickness of 2.0 mm. In Experimental Example 3, three (12 in total) reinforcing ribs were provided at each of the four corners of the rectangular lid, and the lid had a basic thickness of 2.0 mm. In Comparative Example 1, no reinforcing rib was provided at each corner, and the thickness of the lid was set to the basic thickness of 2.0 mm. In Comparative Example 2, no reinforcing rib was provided at each corner, and the thickness of the lid was 0.5 mm thicker than the basic thickness of 2.0 mm. In Comparative Example 3, no reinforcing rib was provided at each corner, and the thickness of the lid was 1.0 mm thicker than the basic thickness of 2.0 mm. In addition, the thickness of the reinforcing ribs in Experimental Examples 1 to 3 was all the same,
The lid had a basic thickness of 2.0 mm or less.

[0026]

[Table 1]

Table 1 shows the results of the stress analysis by the finite element method described above. According to this result, the values of the maximum stress are smaller in Experimental Examples 1 to 3 in which the reinforcing ribs are provided at the corners than in Comparative Examples 1 to 3 without the reinforcing ribs. In particular, in Experimental Examples 1 and 2 in which the number of reinforcing ribs at each corner is four or more, the value of the maximum stress is considerably small. In the case of such a substantially rectangular parallelepiped container, each corner has It can be seen that it is more preferable to provide four or more reinforcing ribs. In Comparative Examples 2 and 3 in which the thickness of the lid was increased, the value of the maximum stress was slightly smaller than in Comparative Example 1 in which the basic thickness was increased. However, four or more reinforcing ribs were provided at each corner. It can be seen that the effect is not so much improved as compared with the experimental examples 1 and 2 provided.

With respect to the containers of Experimental Example 1 and Comparative Example 1 described above, an easy lid closing test, a lid buckling test, a high-temperature stacking test, a load shift test, and an overturning test were performed. evaluated. In the test for confirming easy lid closing, compression was performed at a speed of 10 mm / min using a compression tester, and the load when the lid was closed was measured. The temperature condition is 23 ° C. In the lid buckling test, containers with the lid closed were stacked in two stages, compressed at a speed of 10 mm / min by a compression tester, and the load when the lid buckled was measured. The temperature condition is 23 ° C. The high-temperature stacking test is
Stack containers containing 15 kg of water (water) in three tiers,
The sample was stored in a constant temperature bath at a temperature of ℃, and the time required for the lid to crack was measured. In the load shift test, a container containing 10 kg of water (water) is placed on a fixed lid (only the lid and no body), and in this state the container is pulled in the horizontal direction to determine the force that causes load shift. It was measured. In the overturning test, containers containing 15 liters of water were stacked in three stages and overturned.

[0029]

[Table 2]

Table 2 shows the results of each test.
According to this result, it is understood that Experimental Example 1 has the same easy lid closing property as Comparative Example 1, and strength can be secured without lowering the easy lid closing property by the reinforcing rib.
Moreover, in the lid buckling test, the high-temperature stacking test, and the load shift test, Experimental Example 1 has better results than Comparative Example 1. Further, in the fall test, Experimental Example 1 was compared with Comparative Example 1
The results are as good as. From these experimental results, it can be seen that the effect of the present invention is remarkably exhibited.

It should be noted that the present invention is not limited to the above-described embodiment, but includes other configurations that can achieve the object of the present invention. For example, the following modifications are included in the present invention. That is, in the above-described embodiment, five reinforcing ribs 40 are provided at each of the four corner portions 37 of the lid 30, but the number of reinforcing ribs provided is arbitrary. However, when it is provided at the corner 37 of the substantially rectangular lid 30 as in the above embodiment, it is preferable to provide four or more . The five reinforcing ribs 40 of each corner 37 do not need to have the same thickness, and may have different thicknesses.

Further, the shape of the reinforcing rib 40 has a substantially triangular shape, but is not limited to this shape, and may be, for example, a rectangle, a sector, or the like. But,
It is preferable to have a substantially triangular shape, so that mold release after molding can be easily performed.

Further, although the container 10 of the embodiment has been a substantially rectangular parallelepiped shape may be other shapes, for example, it may be an polygonal shape such as hexagonal prism, short Hoboo
Any configuration may be used as long as it has a prismatic shape and is divided into a lid and a main body.
Then , an appropriate number of reinforcing ribs may be provided at each corner of the polygonal lid .

[0034]

Further, the outer convex portion 51 provided on the lid 30
Although a substantially L-shape, the shape is not limited, not good if short shape capable of sandwiching the peripheral protrusion 53 of the body 20 between the inner convex portion 50. The material of the container 10 is arbitrary, such as polyethylene or polypropylene, as long as it is a synthetic resin.

[0036]

[Effects of the Invention] As described above, according to the present invention, since a plurality of reinforcing ribs are provided on the back side of the periphery of the lid, the stacking strength of the synthetic resin container is improved while ensuring easy lid closing. after which it is possible to improve, circumference of the bottom panel on the front side of the lid
By forming the inner convex portion and the outer convex portion sandwiching the side convex portion, there is an effect that the stability at the time of stacking can be improved.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing a main part of the embodiment.

FIG. 3 is a plan view showing a main part of the embodiment.

FIG. 4 is a perspective view showing the bottom surface of the main body of the container of the embodiment.

FIG. 5 is a sectional view showing a state in which lids of the containers of the embodiment are stacked.

[Explanation of symbols]

 10 Container 20 Main unit 22 Bottom part 21 Opening part 30 Lid 31 Top part 32 Side part 40 Reinforcement rib 50 Inner convex part 51 Outer convex part 52 Depression 53 Peripheral convex part

Claims (4)

(57) [Scope of request for utility model registration] 1. A substantially polygonal column-shaped synthetic resin container provided with a main body having an opening and a lid covering the opening, wherein the lid is arranged substantially parallel to an opening surface of the opening. It has a substantially polygonal upper surface portion and a side surface portion connected to a peripheral portion of the upper surface portion and intersecting the upper surface portion. On the back side of the lid, a plurality of reinforcing ribs are provided only at corner portions. Provided, and these reinforcing ribs are provided inside the lid.
While being arranged substantially radially around the center and connected so as to intersect the upper surface portion and the side surface portion,
And the thickness thereof is less than the thickness of the upper surface portion, the front side of the lid, another to be stacked on the upper side of the lid
Peripheral protrusion provided on the periphery of the bottom of the main body of the synthetic resin container
Inner convex part and outer convex part arranged so as to sandwich the part
Are formed, and the outer convex portion intersects with some of the reinforcing ribs.
A container made of a synthetic resin, wherein the container is arranged so as to be in such a manner as to be arranged as follows . 2. The synthetic resin container according to claim 1, wherein each of the reinforcing ribs has a substantially triangular shape having one side connected to the upper surface and the other side connected to a side surface. A container made of synthetic resin. 3. The synthetic resin container according to claim 1, wherein the inner convex portion is disposed on a front side of the lid.
Parts are synthetic resin container, characterized in that it is formed in a recess shape to be fitted to the bottom panel of another synthetic resin container to be stacked on the upper side of the lid. 4. The synthetic resin container according to claim 1, wherein a side portion of the lid is outside the lid.
Has a curved portion that fits with the periphery of the opening of the main body.
A synthetic resin container characterized in that a packing is accommodated in the curved portion .