JP2010228800A - Resin container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin container which is placed on a floor, a pallet or the like with the bottom part of a container body being brought into contact with the ground, hardly toppled, and capable of stably stacking various kinds of articles on the resin container filled with the liquid of high vapor pressure. <P>SOLUTION: In a resin container 100, a drum-shaped container body 1 including a cylindrical barrel part 10, a bottom part 20, and a top part 30, and having an external size having a diameter of about 600 mm and a height of about 900 mm, is integrally formed from a resin. The resin container includes: a lower ring part 40 which is integrally formed with the container body 1, arranged around the bottom part 20, and projects from the lower corner part of the container body 1 so that the lower end is located higher than the lowest surface of the bottom part 20; and an upper ring part 50 which is integrally formed with the container body 1, arranged around the top part 30, and projects from the upper corner part of the container body 1 so that the upper end is located to be higher than a highest surface of the top part 30 by at least 10 mm. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a resin container. Specifically, the present invention relates to a resin container in which a drum-shaped container body having an outer dimension of approximately 600 mm in diameter and approximately 900 mm in height is integrally formed of resin.

  As a container of about 200 liters formed in a drum shape having an outer dimension of about 600 mm in diameter and about 900 mm in height, it has a cylindrical body, a base plate that closes the lower end of the body, and a top plate that closes the upper end of the body. Steel containers, so-called “drum cans” are well known, but in recent years, various types of resin containers integrally molded with resin have been developed. Here, in such a resin container, a drum-shaped container body having a cylindrical body portion, a bottom portion closing the lower end of the body portion, and a top portion closing the upper end of the body portion is integrally formed by blow molding. Is.

  By the way, in the drum can, in order to integrate the fuselage and the main plate, and in order to integrate the fuselage and the top plate, it is formed by overlapping and bending the lower end portion of the fuselage and the outer peripheral edge portion of the main plate. Ring-shaped ring portions and ring-shaped ring portions formed by overlapping and bending the upper end portion of the fuselage and the outer peripheral edge portion of the top plate are provided, and upper and lower ring portions, so-called “chimes” are provided. Is essential. On the other hand, in the resin container in which the container main body is integrally molded, the trunk portion and the bottom portion, as well as the trunk portion and the top portion, respectively, are integrally molded from the first, so the ring portion is not essential, In a resin container having no ring part, the upper and lower corners of the container body have an R shape without a clear boundary between the trunk part, the bottom part, and the top part.

  In a resin container without a ring portion, when a liquid having a high vapor pressure is filled, the bottom portion swells outward due to internal pressure and deforms into a curved shape. Therefore, even when such a resin container is placed on a flat surface such as a floor or a pallet, if it is filled with a liquid having a high vapor pressure, the stability is deteriorated and the resin container may fall over.

  Here, there is provided a resin container in which a ring-shaped projecting portion projecting downward is provided on the outer peripheral edge of the bottom portion, and the bottom surface of the projecting portion is grounded to a floor, a pallet, etc. It has been devised.

  However, in such a resin container, the weight of the entire resin container filled with the liquid must be supported by the protrusions at the periphery of the bottom, and the strength as the protrusions must be sufficiently ensured. And if it is going to ensure the intensity | strength of a protrusion part enough, a protrusion part must be formed thickly, and the weight increase of resin container itself will be caused. Moreover, it is difficult to form a ring-shaped thick protrusion by blow molding, which leads to an increase in size and complexity of the mold.

  Furthermore, the height of the protruding portion must be made sufficiently high so that the bottom does not come into contact with the floor, pallet, or the like. Therefore, also from this point, the weight of the resin container itself is increased, and it is difficult to form a high protrusion by blow molding, which leads to an increase in size and complexity of the mold.

  Thus, it is not preferable to provide a ring-shaped protrusion on the outer peripheral edge of the bottom and ground the protrusion on the floor or pallet to support the entire resin container, and there is a demand for grounding the bottom of the container body. It was.

  By the way, in a resin container, when a liquid with a high vapor pressure is filled, the top part is greatly deformed so as to swell outward. Therefore, various resin containers such as stacking other resin containers on a resin container filled with a liquid with high vapor pressure via a pallet or the like, or stacking the upper resin containers directly on the lower resin container, etc. Even when trying to stack the articles, the stability of the stacked articles was poor. Moreover, in the case of the resin container in which the plug port for mounting the plug is projected on the top, there is a possibility that the plug port may be damaged due to the contact of the article by stacking various articles thereon.

  Here, a resin container has been devised in which a ring-shaped protruding portion protruding upward is provided on the outer peripheral edge of the top portion, and various articles can be stacked on the upper surface of the protruding portion. However, in a conventional resin container having a ring-shaped protruding portion that protrudes from the top, the height of the ring-shaped protruding portion is not sufficient, and when the top is greatly deformed, the top surface and the plug port of the top protrude. It jumped out of the club.

  The present invention has been made in view of the above circumstances, and even a resin container placed on a floor, a pallet, etc. with the bottom of the container body grounded is not easily toppled, and a resin filled with a liquid with high vapor pressure It is an object to make it possible to stably stack various articles on a container.

The main means taken by the present invention to solve the above problems are as follows:
“A cylindrical body, a bottom that closes the bottom of the body, and a top that closes the top of the body, a drum-shaped container body having a diameter of about 600 mm and a height of about 900 mm, is integrated with resin. A molded resin container,
A lower ring portion integrally formed with the container body, disposed around the bottom portion, and projecting from a lower corner portion of the container body so that a lower end is positioned higher than a lowermost surface of the bottom portion;
An upper ring that is integrally formed with the container body, is disposed around the top, and protrudes from the upper corner of the container body so that the upper end is at least 10 mm higher than the uppermost surface of the top. And a resin container comprising a portion "
It is.

  Here, in the resin container having the above configuration, “substantially” is used as the outer dimension of the container body, but the present invention is intended for a resin container of about 200 liters. There is no limit. Therefore, “substantially” may be regarded as ± 10% as a general common sense approximate value.

  In addition, the lower and upper corners of the container main body provided with the lower ring part and the upper ring part indicate the boundary part between the trunk part and the bottom part and the boundary part between the trunk part and the top part, In the container main body in which the body part, the bottom part, and the top part are integrally formed of resin, the boundary between the body part and the bottom part and the boundary between the body part and the top part are not necessarily clear. Therefore, the lower corner portion of the container body may be regarded as the boundary between the trunk portion and the bottom portion and the vicinity thereof, and the upper corner portion of the container body is defined as the boundary between the trunk portion and the top portion and the vicinity thereof. What is necessary is just to regard it as a neighborhood. And in the said structure, a lower ring may be provided in the trunk | drum side in the boundary part of a trunk | drum and a bottom part, and may be provided in the bottom part side. Moreover, in the said structure, an upper ring may be provided in the trunk | drum side in the boundary part of a trunk | drum and a top part, and may be provided in the top | upper part side.

  In the resin container having the above configuration, the lower ring portion protruding from the lower corner portion of the container body is provided, and the lower end of the lower ring portion is positioned higher than the lowermost surface (the lowest level surface) of the bottom portion. It is the bottom surface of this bottom that is grounded to the floor or pallet. Even if the bottom surface of the bottom part is deformed by filling with a liquid having a high vapor pressure and the resin container becomes unstable, the resin container is inclined because the lower ring part is disposed around the bottom part. And the lower ring part abuts against a floor, a pallet, etc., and suppresses further inclination of the resin container. That is, the lower ring portion functions as a fall prevention for the resin container.

  Therefore, the resin container having the above-described configuration is a resin container that is placed on the floor, pallet, or the like with the bottom of the container body grounded, but even if filled with a liquid having a high vapor pressure, the resin container does not easily fall over.

  In addition, since the lower ring does not support the weight of the resin container itself placed on the floor or pallet, it is sufficient if the resin container abuts against the floor or pallet when the resin container is tilted and suppresses further inclination. It is not necessary to form it so thick, and it is not necessary to make it protrude greatly at the lower corner of the container body. Therefore, compared with a resin container without a lower ring portion, there is no significant increase in weight, and there is no significant increase in size and complexity of the mold.

  By the way, in the resin container of the said structure, the upper ring part which protrudes from the upper corner | angular part of a container main body is provided, and the upper end of this upper ring part is higher than the uppermost surface (highest level surface) of a top part. At least 10 mm (in other words, 10 mm or more) higher. That is, in the resin container having the above configuration, even when the top part is deformed by filling with a liquid having a high vapor pressure, a sufficient height of the upper ring part is secured so that the top part does not protrude from the upper end of the upper ring part. ing.

  Therefore, in the resin container having the above structure, even when a liquid with a high vapor pressure is filled, the uppermost surface as the resin container is unchanged at the upper end surface of the upper ring portion, and the upper end surface of the unchanged upper ring portion is the same. Various articles can be stacked stably.

  In addition, the upper limit of the height of the upper ring part is not significant as a limit value, and may be set as appropriate as long as there is no hindrance in use and stable mass production is possible at a low cost. Specifically, the amount of protrusion from the container main body is 70 mm or less, preferably 60 mm or less, and approximately 50 mm. In consideration of convenience of use and mass productivity, the height of the upper ring portion is sufficient. Since it can ensure, it is suitable.

In the means described above,
“The amount of protrusion of the lower ring portion from the container body is smaller than the amount of protrusion of the upper ring portion from the container body”
Is preferable.

  The upper ring portion needs to be at least 10 mm higher than the top surface of the top portion, and the amount of protrusion from the corner portion of the resin container must be set sufficiently large. What is necessary is just to be able to prevent a fall, and it is not necessary to make it protrude largely from the corner | angular part of a container main body. Therefore, as described above, by setting the amount of protrusion of the lower ring portion from the container main body to be smaller than the amount of protrusion of the upper ring portion from the container main body, an unnecessary weight increase of the entire resin container is not caused. The resin container according to the present invention can be satisfactorily realized without causing unnecessary enlargement and complication of the mold used when the resin container is blow-molded. Note that, from the viewpoint of reducing the material for forming the lower ring portion and simplifying the mold, it is desirable that the protrusion amount of the lower ring portion be ½ or less of the protrusion amount of the upper ring portion.

In the means described above,
“The top portion includes a protruding plug port to which a plug is mounted, and the uppermost surface is constituted by the upper end surface of the plug port”.
Is preferable.

  In the resin container having the above-described configuration, the top surface of the top is formed by the upper end surface of the plug port, and the height of the upper end of the upper ring unit is at least 10 mm higher than the upper end surface of the plug port. is there. Therefore, even if the top portion is deformed by filling the resin container with a liquid having a high vapor pressure and the height of the upper end surface of the plug port is increased, the upper end surface of the plug port does not protrude from the upper end of the upper ring portion. The upper ring is sufficiently high. As a result, even if various articles are stacked on a resin container filled with a liquid having a high vapor pressure, the stopper is protected by the upper ring portion higher than the stopper, and is stacked on the resin container. This makes it difficult for the article to contact the stopper.

In the means described above,
“The lower ring part is formed in a skirt shape at the bottom of the trunk part so as to form a groove between the bottom part and the bottom part,
The upper ring portion has a resin container characterized in that the upper end is formed in a size and shape that can be inserted into the groove.
Is preferable.

  In conventional containers such as drums and resin containers, when storing and transporting many containers, it is not assumed that other containers are stacked directly above the lower container. Other containers are stacked on the other container via a pallet, or other containers are stacked in a staggered pattern directly on a plurality of containers.

  On the other hand, in the resin container having the above-described configuration, the upper ring portion is formed in a dimensional shape that can be inserted into the groove formed between the lower ring portion and the bottom portion. If the same type of resin container is stacked so that the upper ring portion of the lower resin container is inserted into the groove of the upper resin container, two resin containers of the same type can be stacked stably. .

  It should be noted that each of the upper ring part and the groove formed between the lower ring part and the bottom part may be made strong enough to withstand even when the resin containers filled with liquid are stacked. Then, the upper ring portion and the lower ring portion must be formed with a sufficient thickness, which may cause unnecessary weight increase. Therefore, each of the upper ring part and the groove formed between the lower ring part and the bottom part cannot withstand stacking of resin containers filled with liquid, but when empty resin containers are stacked, The strength can be withstood. In this way, the same type of resin container can be stacked directly on top of one resin container, and when storing or transporting a large number of empty resin containers, The freedom of the way increases.

  As described above, according to the present invention, even a resin container placed on a floor, a pallet or the like with the bottom of the container body grounded can be prevented from overturning, and a resin container filled with a liquid having a high vapor pressure. It is possible to stably stack other resin containers on the top.

It is a partial section front view showing an example of the resin container concerning the present invention. It is a top view of the resin container shown in FIG. It is a bottom view of the resin container shown in FIG. It is the A section enlarged view in FIG. It is the B section enlarged view in FIG.

  An example as an embodiment of the resin container according to the present invention will be described in detail below with reference to the drawings.

  1-3, an example of the resin container 100 is shown. In the resin container 100, a container body 1 having a cylindrical body portion 10, a bottom portion 20 that closes the lower end of the body portion 10, and a top portion 30 that closes the upper end of the body portion 10 is integrally formed by resin blow molding. It is molded. The container body 1 is formed in a drum shape having an outer dimension of approximately 600 mm in diameter and approximately 900 mm in height, and can contain 200 liters of liquid. As specific dimensions, the maximum outer diameter of the container body 1 is 576 mm in diameter, the height of the container body 1 is 893 mm, and the thickness of the container body 1 is approximately 5 mm.

  Moreover, as shown in FIG. 4, the upper ring part 50 is protrudingly provided in the upper corner | angular part of the container main body 1, and as shown in FIG. A lower ring portion 40 is projected. Here, the upper ring portion 50 and the lower ring portion 40 are formed integrally with the container body 1 when the container body 1 is blow-molded. The details of the upper ring portion 50 and the lower ring portion 40 will be described later.

  A plurality of fine ridges 11 are juxtaposed on the upper portion and the lower portion of the trunk portion 10, and the rope is difficult to slip when the rope is hung on the resin container 100.

  The top portion 30 is provided with two plug ports 31 to which plugs are respectively attached, and the upper end surfaces of these plug ports 31 are the uppermost surface (the highest level surface) of the top portion 30. . Further, the top surface of the top portion 30 excluding the plug port 31 is constituted by a first top surface 33 and a second top surface 32 that are sequentially lower than the upper end surface of the plug port 31. Here, each of the first top surface 33 and the second top surface 32 is a flat surface that does not bend, and even if the resin container 100 is filled with a liquid having a high vapor pressure, the first top surface 33 and the second top surface 32 are not greatly bent outward. It is difficult to do.

  In addition, the two plug ports 31 are provided so as to protrude from the second top surface 32, respectively, but on the second top surface 32, ribs 34 project between the two plug ports 31. The top 30 has a structure that is difficult to be deformed by the ribs 34. The upper end surface of the rib 34 is at the same level as the first top surface 33, and various articles can be stably placed on the first top surface 33 and the rib 34.

  The bottom 20 has a bottom surface whose first bottom surface 21 has the highest level, a second bottom surface 22 with the lowest level, and a third bottom surface 23 that is at an intermediate level between the first bottom surface 21 and the second bottom surface 22. It is constituted by.

  The first bottom surface 21 is a surface of the central portion of the bottom portion 20, and is a surface that gently curves inward. The first bottom surface 21 is a surface that is not grounded when the resin container 100 is placed on a floor or a pallet.

  The second bottom surface 22 and the third bottom surface 23 are annular surfaces surrounding the first bottom surface 21 and are flat surfaces, respectively. The third bottom surface 23 is a surface that is not grounded when the resin container 100 is placed on a floor, a pallet, or the like, but the second bottom surface 22 is a surface that forms the lowermost surface (the lowest level surface) in the bottom portion 20. It is a surface that is grounded when the resin container 100 is placed on a floor, a pallet, or the like.

  In the present example, the third bottom surface 23 is provided in a portion corresponding to a position directly below the plug port 31 of the top 30. The second bottom surface 22 is a pair of opposing semicircular arc surfaces separated by the third bottom surface 23 as shown by a lattice pattern in FIG. Therefore, in the resin container 100 of the present example, even if the bottom portion 20 is deformed by filling with a liquid having a high vapor pressure, the second bottom surface 22 that is a ground contact surface is unlikely to be spherical and has a stable structure.

  The upper ring portion 50 is provided around the top portion 30 and protrudes from the upper corner portion of the container body 1 as shown in FIG. Here, the tip portion of the upper ring portion 50 is formed in a substantially L shape, and sufficient strength of the tip portion of the upper ring portion 50 is ensured. A plurality of fine ridges 51 are provided on the surface of the tip portion of the upper ring portion 50 formed in a substantially L shape, and the resin container 100 is conveyed by grasping the upper ring portion 50 by hand. In some cases, the hand is difficult to slip.

  In this resin container 100, the upper end surface of the upper ring portion 50 is the uppermost surface in the entire resin container 100, but the upper end surface of the upper ring portion 50 is the plug port 31 projecting from the top portion 30. It is 10 mm or more higher than the upper end surface. More specifically, the upper end surface of the upper ring portion 50 is 18 mm higher than the upper end surface of the plug port 31 (see H1 in FIG. 4). Therefore, even if the top portion 30 is greatly deformed by filling the resin container 100 with a liquid having a high vapor pressure, the upper end surface of the plug port 31 does not protrude from the upper end surface of the upper ring portion 50, so When the various articles are stacked on each other, the upper article does not become unstable. In addition, the plug port 31 protrudes from the top portion 30 and is protected by the upper ring portion 50. Therefore, various articles such as pallets are stacked on the upper ring portion 50 of the resin container 100. Even if this is the case, the article will not contact the plug port 31 and damage the plug port 31.

  Further, the first top surface 33 and the second top surface 32 are at a position lower than the stopper 31, and the upper end surface of the upper ring portion 50 is naturally higher than the first top surface 33 and the second top surface 32. Although it is located, specifically, it is 35 mm higher than the first top surface 33 (see H2 in FIG. 4) and 45 mm higher than the second top surface 32 (see H3 in FIG. 4).

  Further, the upper ring portion 50 is provided around the top portion 30, but the container body 1 so that a groove (hereinafter referred to as “upper ring groove 52”) is formed between the top ring portion 50 and the top portion 30. It is formed in the corner part. The upper ring portion 50 has a height of 50 mm from the bottom of the upper ring groove 52 (see H4 in FIG. 4), and the protruding amount of the upper ring portion 50 from the corner portion of the container body 1 is 50 mm. ing. The upper ring groove 52 has a depth of 5 mm with respect to the second top surface 32 and constitutes the lowermost portion in the region surrounded by the upper ring portion 50. Therefore, rainwater, spilled liquid or the like accumulates in the upper ring groove 52, but the upper ring groove 52 communicates with the outer surface of the outer ring part 50 in the lower part of the upper ring part 50 at a portion facing the plug port 31. A drain hole (not shown) is formed, and rainwater, liquid, etc. accumulated in the upper ring groove 52 are well discharged to the outer surface side of the upper ring portion 50 through the drain hole.

  The lower ring portion 40 is provided around the bottom portion 20 and protrudes from the lower corner portion of the container body 1 as shown in FIG. Here, the tip portion of the lower ring portion 40 is formed in an approximately L shape, and sufficient strength of the tip portion of the lower ring portion 40 is ensured. In addition, a plurality of fine ridges 41 are provided on the surface of the base end portion of the lower ring portion 40. When the lower ring portion 40 is gripped by hand when the resin container 100 is turned over, It is difficult to slip.

  In the resin container 100, the lowermost surface of the bottom portion 20 (specifically, the second bottom surface 22 in this example) is the lowest surface of the entire resin container 100, but the lower end surface of the lower ring portion 40 is the bottom portion 20. It is higher than the bottom surface. More specifically, the lower end surface of the lower ring portion 40 is 6 mm higher than the lowermost surface of the bottom portion 20 (see H5 in FIG. 5). Therefore, even if the bottom 20 is deformed by filling the resin container 100 with a liquid having a high vapor pressure and the resin container 100 becomes unstable and tilts, the lower end of the lower ring portion 40 is grounded with a slight tilt, Further inclination of the container 100 is suppressed. This prevents the resin container 100 from overturning.

  In addition, when each of the resin container A having the lower ring part 40 and the resin container B from which the lower ring part 40 is removed is filled with water, a pressure of 150 kPa is applied and left on a flat floor surface, The applicant has obtained a verification result that the resin container B has fallen after the lapse of 30 days, whereas the resin container A has not fallen, and the fall prevention effect by the lower ring portion 40 is sufficiently exerted. Has been proven.

  Incidentally, the lower ring portion 40 is disposed around the bottom portion 20, but the corner of the container body 1 is formed so that a groove (hereinafter referred to as “lower ring groove 42”) is formed between the lower ring portion 40 and the bottom portion 20. It is formed in the part. The lower ring portion 40 has a height of 20 mm from the bottom of the lower ring groove 42 (see H6 in FIG. 5), and the protruding amount of the lower ring portion 40 from the corner portion of the container body is 20 mm. . Here, the protrusion amount of the lower ring portion 40 is smaller than the protrusion amount (50 mm) of the upper ring portion 50 described above, and is ½ or less of the protrusion amount of the upper ring portion 50. Thus, in the resin container 100 of the present example, the lower ring portion 40 that does not protrude unnecessarily greatly is configured so as not to cause an unnecessary increase in the weight of the entire resin container 100.

  Further, the lower ring portion 40 is formed in a skirt shape at the lower portion of the body portion 20 so that the lower ring groove 42 is formed, and the dimensional shape of the lower ring groove 42 and the upper ring portion 50 is the upper ring, respectively. The upper end of the portion 50 is set to a size and shape that can be inserted into the lower ring groove 42. Therefore, when another resin container 100 of the same type is stacked directly on the resin container 100, the lower ring groove 42 of the upper resin container 100 is fitted into the upper ring portion 50 of the lower resin container 100, The two resin containers 100 can be stably stacked.

  As described above, the third bottom surface 23 of the bottom portion 20 of the resin container 100 is recessed and located at a high position with respect to the lowest second bottom surface 22, so that the upper stage is directly above the lower resin container 100. When the resin containers 100 are stacked, the upper resin is placed in the stopper 31 of the lower resin container 100 by positioning the third bottom surface 23 of the upper resin container 100 above the stopper 31 of the lower resin container 100. It becomes difficult for the bottom part 20 of the container 100 to contact. Further, in the resin container 100 of the present example, by stacking in this way, the bottom 31 of the upper resin container 100 does not come into contact with the plug opening 31 of the lower resin container 100. Dimension shape is set.

  Although an example of the resin container according to the present invention has been described above, the resin container according to the present invention is not limited to the above-described example, and can be appropriately changed without departing from the gist of the present invention.

  For example, the various dimensions in the resin container of the above-described example are merely examples, and can be set as appropriate without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Container main body 10 trunk | drum 11 ridge 20 bottom part 21 1st bottom face 22 2nd bottom face 23 3rd bottom face 30 top part 31 plug port 32 2nd top face 33 1st top face 34 rib 40 lower ring part 41 ridge 42 lower Ring groove 50 Upper ring part 51 Projection 52 Upper ring groove 100 Resin container

Claims (4)

A drum-shaped container body having an outer dimension of approximately 600 mm in diameter and approximately 900 mm in height is integrally formed of resin with a cylindrical body, a bottom for closing the lower end of the body, and a top for closing the upper end of the body. A resin container,
A lower ring portion integrally formed with the container body, disposed around the bottom portion, and projecting from a lower corner portion of the container body so that a lower end is positioned higher than a lowermost surface of the bottom portion;
An upper ring that is integrally formed with the container body, is disposed around the top, and protrudes from the upper corner of the container body so that the upper end is at least 10 mm higher than the uppermost surface of the top. And a resin container.   2. The resin container according to claim 1, wherein an amount of protrusion of the lower ring portion from the container body is smaller than an amount of protrusion of the upper ring portion from the container body.   3. The top part according to claim 1 or 2, wherein the top part includes a protruding plug port to which a plug is mounted, and the uppermost surface is constituted by an upper end surface of the plug port. Resin container. The lower ring part is formed in a skirt shape at the lower part of the body part so as to form a groove between the bottom part and the bottom part,
4. The resin container according to claim 1, wherein an upper end of the upper ring portion is formed in a size and shape that can be inserted into the groove.

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