JP7025848B2 - Square can - Google Patents

Description

In the present invention, the lids are joined to the open ends of the body, which is a substantially square cylinder, and the outer method of the joint between the lid and the body is the lid and the other. It relates to a square can formed smaller than the inner method of the joint with the body.

For storage of square cans such as itto cans (18L cans) used as containers for detergents, seasonings, cooking oil, chemicals, etc., the square cans are closely attached in the front-back and left-right directions in order to improve the efficiency of storage space. It is arranged in a flat manner and is stacked up and down in several stages. When stacking the top and bottom, the winding portion around the bottom lid of the square can, which is the upper stage, is placed on the winding portion around the canopy of the square can located at the lower stage. Since the winding parts of these peripheral edges have a thin shape protruding from the peripheral edges of the canopy and bottom lid, it is difficult to stack square cans vertically, especially when stacking three or more stages. , There is a risk that the load of the square can will collapse due to contact during work or shaking due to an earthquake.

In order to prevent the load from collapsing due to the stacking of such square cans, they are engaged with the winding portion of the canopy peripheral edge of the square can located at the lower stage and the winding portion of the bottom lid peripheral edge of the square can located above it. A holder for preventing load collapse, in which a groove portion is formed, is disclosed (see Patent Document 1). Further, by making the entire body of the square can into a so-called tapered shape and reducing the peripheral diameter of either the canopy or the bottom lid, the winding portion of the other peripheral edge is formed inside the winding portion of one peripheral edge. A square can that is positioned so as to prevent the load from collapsing is disclosed (see Patent Document 2).

Japanese Unexamined Patent Publication No. 2004-315060 Japanese Patent Application Laid-Open No. 2003-72756

According to the load collapse prevention holder disclosed in Patent Document 1, since the groove portion is engaged with the winding portion of the peripheral edge of the square cans stacked vertically, the load collapse can be effectively prevented. , It is necessary to install at each of the four corners of the square can, which increases the cost of preparing the holder and requires mounting and removal, which makes the work more complicated than before. Further, according to the square can described in Patent Document 2, it is not necessary to prepare accessories such as a holder, and it is possible to prevent the load from collapsing due to stacking up and down, but the peripheral diameter of either the canopy or the bottom lid. Since the size is reduced and the entire body is tapered, the volume is reduced, and it may be difficult to secure an appropriate capacity. It may be possible to limit the taper shape to the end of the body of the square can and to keep the amount of change in volume within the standard, but there is no room in the allowable range of the standard dimensions of the square can, and the square can. Manufacture of cans becomes difficult.

An object of the present invention is to provide a square can that is easy to manufacture while securing a predetermined volume in the can and that suppresses load collapse due to stacking up and down.

In order to solve the above problems, in the container according to the present invention, lids are joined to both ends of the body which is a substantially square cylinder, and one of the lids , the bottom lid and the body, The outer method of the joint portion is a square can formed to be smaller than the inner method of the joint portion between the canopy which is the other lid portion and the body portion, and the body portion is the body portion on the bottom lid side. A reduced diameter portion is formed in which the diameter is reduced starting from a predetermined point on the end side of the portion and ending at a predetermined point close to the protruding portion formed by bending at the end portion of the bottom lid. The area of the extension line, the protruding portion of the bottom lid, and the reduced diameter portion is surrounded by the extension line of the bottom lid, the extension line of the body portion, and the reduced diameter portion. The reduced diameter portion is formed so as to be larger than the area .

According to such a configuration, the outer method of the joint portion of the bottom lid , which is one lid portion, is formed smaller than the inner method of the joint portion of the canopy and the trunk portion, which is the other lid portion. Therefore, a plurality of square cans can be easily stacked, and it is possible to prevent the load from collapsing even when shaking such as an earthquake occurs. Then, a predetermined point where the end point of the reduced diameter of the reduced diameter portion formed on the body portion, which is reduced in diameter starting from the end portion side of the body portion, is close to the protruding portion formed by bending at the end portion of the bottom lid . Therefore, it is possible to suppress the decrease in capacity due to diameter reduction to a low level. Even if the body portion is provided with a reduced diameter in order to facilitate and stabilize the stacking of the square cans, the portion surrounded by the extension line of the bottom lid, the protruding portion of the bottom lid, and the reduced diameter portion. The reduced diameter portion is formed so that the area (increased portion) of is larger than the area (decreased portion) surrounded by the extension line of the bottom lid, the extension line of the body portion, and the reduced diameter portion. Therefore, when one of the lids is the bottom lid of the square can, it is possible to prevent a decrease in the capacity of the square can.

In the square can according to the present invention, the axial length of the body portion between the end point and the tip end of the protrusion is 40% or more of the axial length of the start point and the tip end of the protrusion. The reduced diameter portion may be formed so as to be smaller than the axial length of the protruding portion.

According to such a configuration, a reduced diameter portion is formed in the body portion in order to easily and stably stack the square cans, but the body portion between the end point of the reduced diameter of the reduced diameter portion and the tip of the protruding portion. The axial length of the protrusion is 40% or more of the axial length between the starting point and the tip of the protrusion, and is smaller than the axial length of the protrusion to prevent interference with the joint. It is possible to avoid it and form a reduced diameter portion, and it is possible to suppress a decrease in the capacity of the square can to a low level.

In the square can according to the present invention, the body portion is further formed by bending at a predetermined point on the end portion side of the body portion on the other lid portion side and at the end portion of the other lid portion. It is possible to form an additional diameter-reduced portion having a diameter reduction amount different from that of the diameter-reduced portion, which is reduced in diameter with a predetermined point close to and opposed to the protruding portion as an end point.

According to such a configuration, when the outer method of the joint portion between the lid portion and the body portion is formed smaller than the inner method of the joint portion between the lid portion and the body portion of the other. Not only the reduced diameter portion on one lid side, but also the other lid portion side of the end portion of the body portion can be provided with an additional reduced diameter portion having a reduced diameter amount different from that of the reduced diameter portion.

In the square can according to the present invention, the body portion is further formed by bending at a predetermined point on the end portion side of the body portion on the other lid portion side and at the end portion of the other lid portion. It is possible to form a configuration in which a diameter-expanded portion is formed in which the diameter is expanded with a predetermined point in front of the protrusion as the end point.

According to such a configuration, when the outer method of the joint portion between the lid portion and the body portion is formed smaller than the inner method of the joint portion between the lid portion and the body portion of the other. An enlarged portion having a diameter larger than that of the body portion can be provided on the other lid side of the end portion of the body portion. By providing a reduced diameter portion on one side and an enlarged diameter portion on the other side, stacking is easy and load collapse due to stacking can be suppressed.

In the square can according to the present invention, the lids are joined to the open ends of the body, which is a substantially square cylinder, and the inner method of the joint between the lid and the body is the other. It is a square can formed larger than the outer method of the joint between the lid and the body, and the body starts from a predetermined point on the end side of the body on one side of the lid. The structure is such that an enlarged portion having an enlarged diameter is formed with a predetermined point in front of the protruding portion formed from the bent portion of the one lid portion as an end point.

According to such a configuration, the inner method of the joint portion between the one lid portion and the body portion is formed larger than the outer method of the joint portion between the other lid portion and the body portion, and the body portion is formed. , An enlarged portion is formed whose starting point is a predetermined point on the end side of the body portion on one lid side and the end point is a predetermined point in front of the protruding portion formed from the bent portion of one lid portion. Therefore, the stacking of the square cans becomes easy and stable, and the enlarged diameter portion is formed so that the capacity does not decrease. By providing such an enlarged diameter portion, a predetermined gap is formed between adjacent square cans, so that, for example, precooling and preheating by an air conditioner or the like can be effectively performed during storage.

In the square can according to the present invention, the body portion is further formed by bending at a predetermined point on the end portion side of the body portion on the other lid portion side and at the end portion of the other lid portion. It is possible to form an additional diameter-expanded portion having a diameter-expanded portion different from that of the diameter-expanded portion that expands the diameter with a predetermined point close to and opposed to the protruding portion as an end point.

According to such a configuration, when the inner method of the joint portion between the lid portion and the body portion is formed larger than the outer method of the joint portion between the lid portion and the body portion of the other. An additional diameter-expanded portion can be formed on the end side of the other lid portion, which makes it easy and stable to stack square cans and secures a predetermined gap between adjacent square cans, for example. Precooling, preheating, etc. can be effectively performed by an air conditioner or the like during storage.

In the square can according to the present invention, the joint portion is a winding portion formed by winding the end portion of the body portion and the end portion of the lid portion, and the outer method of the joint portion is opposed to the winding portion. With respect to the outer dimension between the portions, the inner method of the joint portion may be configured to be the inner dimension between the facing winding portions.

According to such a configuration, when the joint portion is a winding portion between the body portion and the lid portion, the joint portion has a predetermined length depending on the thickness of each plate due to the winding portion, so that the outer method of the joint portion is opposed to winding. The outer dimension between the tightening portions, the inner method of the joint is the inner dimension between the opposing winding portions.

According to the square can according to the present invention, in order to prevent the load from collapsing due to stacking during storage, the outer method of the joint portion of one lid portion with the body portion is inside the joint portion of the other lid portion and the body portion. In a square can formed smaller than the method, the reduction of the predetermined capacity in the can can be suppressed to a low level.

FIG. 1 is a front view of a square can according to the first embodiment of the present invention. FIG. 2A is a plan view of the square can shown in FIG. FIG. 2B is a bottom view of the square can shown in FIG. FIG. 3 is an end view of X1-X1 in FIG. 2A. FIG. 4 is a front view in which two square cans shown in FIG. 1 are stacked one above the other. FIG. 5 is a partially enlarged end view of P1 shown in FIG. FIG. 6 is an explanatory diagram showing the manufacturing procedure (a), (b), (c), (d), (e), and (f) of the body of the square can shown in FIG. FIG. 7 is a front view of a square can according to the second embodiment of the present invention. FIG. 8A is a front view (partially omitted) in which two square cans shown in FIG. 7 are stacked one above the other. FIG. 8B is a partially enlarged end view of P2 shown in FIG. 8A. FIG. 9 is a front view of a square can according to a third embodiment of the present invention. FIG. 10A is a front view (partially omitted) in which two square cans shown in FIG. 9 are stacked one above the other. FIG. 10B is a partially enlarged end view of the P3 shown in FIG. 10A. FIG. 11 is a front view of a square can according to a fourth embodiment of the present invention. FIG. 12A is a front view (partially omitted) in which two square cans shown in FIG. 11 are stacked one above the other. 12B is a partially enlarged end view of the P4 shown in FIG. 12A. FIG. 13 is a front view of a square can according to a fifth embodiment of the present invention. FIG. 14A is a front view (partially omitted) in which two square cans shown in FIG. 13 are stacked one above the other. 14B is a partially enlarged end view of P5 shown in FIG. 14A.

Embodiments of the present invention will be described with reference to the drawings.

(First Embodiment)
In FIGS. 1, 2A and 2B, the square can 11 (so-called 18-liter can or itto-kan) according to the first embodiment of the present invention is formed of a steel plate having a predetermined thickness (for example, 0.32 mm). A canopy 13 which is a lid (end plate) is joined to the upper end which is one end of both ends of the body 12 which is a substantially square pillar-shaped cylinder by winding, and the lower end which is the other end is a lid. The bottom lid 15 which is a portion (end plate) is joined by winding, and both ends are sealed. Reinforcing beads 16a, reinforcing beads 16b and reinforcing beads 16c are formed on each side surface of the body portion 12 by press working.

The canopy 13 is surrounded by a protrusion 17 (protruding outward in the axial direction of the body 12) formed by bending when the canopy 13 is joined to the end of the body 12 (diameter reduced portion 14) by winding. It has been. At the tip of the protruding portion 17, a winding portion 18 which is a joint portion between the canopy 13 and the reduced diameter portion 14 (see FIG. 3), which is a reduced diameter portion of the body portion 12, is formed. The bending is at an angle close to a right angle. At the substantially central portion of the canopy 13, a hand ring 21 for gripping the square can 11 is attached to a washer 22 welded to the canopy 13 so as to be rotatable between an upright state (when gripping) and an overturned state. It is installed. Further, one of the four corners of the canopy 13 is provided with a filling port 20 for filling and taking out the contents into the square can 11. Further, similarly to the body portion 12, a reinforcing bead 23 is formed on the canopy 13 by press working.

The bottom lid 15 is surrounded by a protrusion 28 (projecting outward in the axial direction of the body 12) formed by bending when the bottom lid 15 is joined to the end of the body 12 by winding. A winding portion 26, which is a joint portion between the bottom lid 15 and the tip portion of the body portion 12, is formed at the tip of the protruding portion 28. The bending is at an angle close to a right angle. Further, like the body portion 12 and the canopy 13, a reinforcing bead 31 is formed on the bottom lid 15 by press working.

As shown in FIG. 3, which is an end view of X1-X1 of FIG. 2A, the outer method of the winding portion 18 of the canopy 13 of the square can 11 described above (outer dimension L1 between the opposing winding portions 18) is a square can. Since it is formed to have a size smaller (for example, about 1.0 mm or more smaller) than the inner method of the winding portion 26 of the bottom lid 15 of 11 (the inner dimension L2 between the facing winding portions 26) (for example, L2). -L1 ≧ 1.0), when another square can 11 is stacked on the canopy 13 of the square can 11, the canopy of the square can 11 is inside the winding portion 28 of the bottom lid 15 of the other square can 11. The winding tightening portion 18 of the 13 is located, so that the stacking can be easily performed and the load collapse can be suppressed. In particular, if the outer method (L1) of the winding portion 18 of the canopy 13 of the square can 11 is slightly smaller than the inner method (L2) of the winding portion 26 of the bottom lid 15 of the square can 11, the winding can be tightened. The portions 18 and 26 are engaged with each other, and it is possible to further suppress the load collapse. The height of the protruding portion 17 of the canopy 13 (the length in the same direction as the axial direction of the body portion 12) H1 (for example, about 6.0 mm to 8.0 mm) is the height of the protruding portion 28 of the bottom lid 15. (Length in the same direction as the axial direction of the body portion 12) It is formed larger than H2 (for example, about 3.0 mm to 3.5 mm). By setting the height H1 and the height H2 within the above length range, contact between the filling port 20, the hand ring 21, the washer 22, etc. provided on the canopy 13 and the bottom lid 15 can be avoided, and the filling port by stacking can be avoided. 20. It is possible to prevent the occurrence of deformation of the hand ring 21, the washer 22, and the like.

As shown in FIG. 4, which is a front view in which two identical square cans 11 (reference numerals 11a and 11b) according to the present embodiment are stacked one above the other, the square cans 11b are placed on the canopy 13a of the square cans 11a. The bottom lid 15b of the above is placed. At this time, as described with reference to FIG. 3, the outer length L1 of the winding portion 18a of the canopy 13a of the square can 11a located at the lower stage is the bottom lid 15b of the square can 11b located at the upper stage. Since the length of the inner method of the winding portion 26b is smaller than L2, the winding portion 18a of the canopy 13a of the square can 11a is fitted inside the winding portion 26b of the square can 11b. It is in a state where the load is less likely to collapse than the conventional square can in which the bottom lid is brought into contact with the wound portion. Therefore, when stacking the square cans 11a and 11b according to the present embodiment, it is possible to eliminate the need for using an instrument such as a load collapse holder.

As shown in FIG. 5, which is an enlarged end view of the P1 portion of FIG. 4 (contact portion between the canopy 13a and the bottom lid 15b), at the joint portion between the canopy 13a of the square can 11a and the end portion of the reduced diameter portion 14a. A certain winding portion 18a has a predetermined gap L3 (for example, about 0.5 mm or more) inside the winding portion 26b which is a joint portion between the bottom lid 15b of the square can 11b and the end portion of the body portion 12b. At the position, it is in contact with the bottom lid 15b. The gap L3 between the winding portion 18a and the winding portion 26b described above is generated by the reduced diameter portion 14a formed on the canopy 13a side of the body portion 12a of the square can 11a.

As shown in FIG. 5, the reduced diameter portion 14a, which is the end portion of the body portion 12a on the canopy 13a side, has the canopy 13a with the predetermined point T1 of the end portion of the body portion 12a on the canopy 13a side as the starting point for starting the diameter reduction. A predetermined point T2 that is close to the protruding portion 17a is set as the end point of the end of diameter reduction. The distance between the starting point T1 and the ending point T2 is such that the axial length of the square can 11a (the vertical length between the canopy 13 and the bottom lid 15) H4 is, for example, about 5.0 to 5.5 mm, and the square can 11a. The length L4 in the direction orthogonal to the axial direction of is, for example, about 1.5 mm or more. Further, the length H3 between the end point T2 at the end of the diameter reduction of the diameter reduction portion 14a and the tip of the winding portion 18a (the axial length of the square can 11a) is, for example, about 4.0 mm to 4.5 mm. A winding portion 18a is formed in H3. Regarding the reduced diameter portion 14a described above, the length H3 is, for example, 40% or more of the length (H3 + H4) in order to suppress the influence of the decrease in the volume of the square can 11a due to the reduced diameter of the body portion 12a. It is formed so as to be smaller than H1. The winding portion 26b protrudes outward from the lateral outer method L5 of the body portion 12a (12b). Since the reduced diameter portion 14a formed as described above is located on the outer side of the reduced diameter portion 71 (the portion shown by the middle chain line in FIG. 5) of the conventional square can having a tapered portion on the body portion, the reduced diameter portion 14a is located. The reduction in the capacity of the square can due to the reduced diameter can be suppressed to a low level.

In FIG. 5, the intersection of the axial extension line m1 of the square can 11a from the starting point T1 at the start of diameter reduction in the body portion 12a and the extension line m2 in the direction orthogonal to the axial direction of the square can 11a of the canopy 13a is defined as T3. Then, the area S1 of the portion surrounded by the extension line m1, the extension line m2, and the reduced diameter portion 14a is the area portion reduced by the reduced diameter of the body portion 12a. Further, the area S2 of the portion surrounded by the extension line m1, the extension line m2 and the reduced diameter portion 71 (the portion shown by the middle chain line in FIG. 5) is reduced in diameter as a tapered portion on the body portion, and the diameter of the conventional square can is reduced. The area is reduced by the diameter. The volumes V1 and V2 formed by rotating the areas S1 and S2 once with the central axis of the square can 11a as the axis of rotation are reduced by the reduced volume portion 14a and the tapered portion of the square can 11a according to the present embodiment, respectively. A reduced volume portion of a conventional square can that has been diametered. Since V1 <V2 is clearly seen from S1 <S2 in FIG. 5, according to the square can 11a according to the present embodiment, the end point T2 at the end of diameter reduction is close to the protrusion 17a side of the canopy 13a, that is, the protrusion 17a. By providing the can at the position where the can is provided, it is possible to suppress a decrease in volume as compared with a conventional square can having a tapered portion on the body portion.

As described above, according to the square can 11 according to the present embodiment, the outer method of the joint portion (winding portion 18) between the canopy 13 which is one lid portion and the body portion 12 (diameter reduced portion 14) is the other. Since it is formed smaller than the inner method of the joint portion (winding portion 26) between the bottom lid 15 and the body portion 12, which is the lid portion of the above, a plurality of square cans 11 can be easily stacked, and an earthquake or the like can occur. It is possible to prevent the load from collapsing even when shaking occurs. Then, since the end point of the reduced diameter of the reduced diameter portion 14 formed on the body portion 12 is a predetermined point T2 closely opposed to the protruding portion 17 formed by bending at the end portion of the lid portion, the body portion is tapered. It is possible to suppress a decrease in volume due to diameter reduction as compared with a conventional square can provided with a portion.

The outline of the manufacturing method of the body portion 12 of the square can 11 will be described with reference to FIG. The rectangular metal plate material (steel plate) 100 shown in FIG. 6 (a) is formed into a cylindrical shape as shown in FIG. 6 (b), and both end portions thereof are overlapped and joined by welding. , A cylindrical cylinder (cylindrical body) 101 is formed. Then, the cylindrical body 101 is formed into a substantially quadrangular tubular body 102 as shown in FIG. 6 (c) by press working with a die. Immediately after molding the tubular body shown in FIG. 6 (c) (or between the steps of FIGS. 6 (e) and 6 (f) described later), the reinforcing beads 16a, 16b, 16c (see FIG. 1). ) Etc., a predetermined shape formed on the body portion 12 is press-molded (not shown). Then, as shown in FIG. 6D, the diameter-reduced portion 14 is formed by press working with the inner mold 105a and the outer mold 105b so that the circumference of one tip of the tubular body 102 is reduced inward. .. After that, as shown in FIG. 6 (e), the inner mold 105a and the outer mold 105b are removed, and the body portion 12 (with the reduced diameter portion 14) of the square can 11 (see FIG. 1) according to the present embodiment is removed. It is formed. After that, as shown in FIG. 6 (f), flange portions 24a and 24b are formed at both ends of the body portion 12 by press working with a die (not shown) (flange portion forming step). Then, the end plates (not shown) to be the lids of the canopy 13 and the bottom lid 15 (see FIG. 1) are joined to both ends of the body portion 12 by winding with the flange portions 24a and 24b, and the square can 11 is formed. Molded (not shown).

(Second Embodiment)
Next, the square can according to the second embodiment of the present invention will be described with reference to FIGS. 7, 8A and 8B. Note that FIG. 8B is an enlarged end view of the P2 portion of FIG. 8A (contact portion between the canopy 13d and the bottom lid 15c). In the explanation of the present embodiment, the differences from the first embodiment will be mainly described, and the common points will be omitted as appropriate. Further, the components common to the first embodiment will be described using the same name, the same code, and the like.

As shown in FIG. 7, the square can 11c according to the present embodiment is formed of a steel plate having a predetermined thickness (for example, 0.32 mm) as in the first embodiment, and has a cylinder having a substantially square pillar shape. The canopy 13c is joined to one end of the portion 12c by winding, and the bottom lid 15c is joined to the other end by winding to form a structure in which both ends are sealed. Reinforcing beads are formed on each side surface of the body portion 12c by press working (the canopy 13c and the bottom lid 15c are also formed by pressing the reinforcing beads as in the first embodiment).

The canopy 13c is surrounded by a protrusion 17c formed by bending when the canopy 13c is joined to the end of the body portion 12c by winding. A winding portion 18c, which is a joint portion between the canopy 13c and the tip portion of the body portion 12c, is formed at the tip of the protruding portion 17c. The bending is at an angle close to a right angle.

The bottom lid 15c is surrounded by a protruding portion 28c formed by bending when the bottom lid 15c is joined to the end portion (diameter reduced portion 14c) of the body portion 12 by winding. A winding portion 26c, which is a joint portion between the bottom lid 15c and the reduced diameter portion 14c, which is a reduced diameter portion of the body portion 12c, is formed at the tip of the protruding portion 28c. The bending is at an angle close to a right angle. As shown in FIGS. 8A and 8B, the feature of the square can 11c according to the present embodiment is that the body portion 12c (12d) of the square can is provided in order to prevent the load collapse of the square cans 11c and 11d stacked vertically. External method (opposing) of the winding portion 26c (26d) which is a joint portion between the reduced diameter portion 14c (14d) formed by the reduced diameter of the lower end portion on the bottom lid 15c (15d) side and the bottom lid 15c (15d). The outer dimension between the winding portions 26c) is the inner method of the winding portion 18d (18c), which is the joint between the end of the body portion 12d (12c) on the canopy 13d (13c) side and the canopy 13d (13c). It is formed so as to be smaller than (inner dimensions between the facing winding portions 18d (18c)). Therefore, when the square can 11c is stacked on the canopy 13d of the square can 11d, the winding portion 26c of the bottom lid 15c of the square can 11c is located inside the winding portion 18d of the canopy 13d of the square can 11d. Therefore, it is easy to stack and it is possible to prevent the load from collapsing. In particular, if the outer method of the winding portion 26c of the bottom lid 15c of the square can 11c is slightly smaller than the inner method of the winding portion 18d of the canopy 13d of the square can 11d, the winding portions 18d and 26c are connected to each other. It will be engaged, and it will be possible to further suppress the collapse of the load. The height of the protruding portion 28c of the bottom lid 15c (length in the same direction as the axial direction of the body portion 12c) H2 (for example, about 6 to 8 mm) is the height of the protruding portion 17d of the canopy 13d (body portion 12d). (Length in the same direction as the axial direction of) H1 (for example, about 3.0 mm to 3.5 mm) is formed larger than H1. Therefore, when the square cans 11c and 11d are stacked, deformation due to contact between the bottom lid 15c and the hand ring (not shown) and the filling port (not shown) provided on the canopy 13d can be avoided.

As shown in FIG. 8B, the reduced diameter portion 14c has a predetermined point T1 at a predetermined point T1 at the end of the body portion 12c on the bottom lid 15c side as a starting point for starting the diameter reduction, and the predetermined point T2 is close to the protruding portion 28c of the bottom lid 15c. Is the end point of the end of diameter reduction. Between the start point T1 and the end point T2, the length H4 (the length in the axial direction of the body portion 12c) and the length L4 (the length in the direction orthogonal to the axial direction of the body portion 12c) are the same as in the first embodiment. It is the length of. In the square can 11c (11d) according to the present embodiment, the reduced diameter portion 14c is provided on the bottom lid 15c side of the body portion 12c, and the outer method of the winding portion 26c of the bottom lid 15c is the winding of the canopy 13d. It is different from the first embodiment in that it is smaller than the inner method of the tightening portion 18d and that the length H2 of the protrusion 28c of the bottom lid 15c is larger than the length H1 of the protrusion 17d of the canopy 13d, and the other parts are common. ..

In FIG. 8B, the axial length (vertical length between the canopy 13 and the bottom lid 15) H4 of the square can 11c of the reduced diameter portion 14c is in the range of, for example, about 5.0 to 5.5 mm. The length L4 in the direction orthogonal to the axial direction of the square can 11c of the reduced diameter portion 14c is formed in a range of, for example, about 1.5 mm or more, and the end point T2 and the winding portion at the end of the reduced diameter of the reduced diameter portion 14c are formed. The winding portion 26c is formed within the range of the length (the axial length of the square can 11c) H3 (for example, about 4.0 mm to 4.5 mm) with the tip of the 26c. Regarding the above-mentioned reduced diameter portion 14c, in order to suppress the influence of the decrease in volume due to the reduced diameter, the length H3 is, for example, 40% or more of the length (H3 + H4), and the length H2 (the protruding portion of the bottom lid 15c). It is formed so as to be smaller than the height of 28c).

In FIG. 8B, as in the first embodiment, the area S1 of the portion surrounded by the extension line m1, the extension line m2, and the reduced diameter portion 14c is the area portion reduced by the reduced diameter. Further, the area S3 of the portion surrounded by the extension line m2, the reduced diameter portion 14c and the protruding portion 28c of the bottom lid 15c is increased by setting the end point T2 at the end of the reduced diameter at a position adjacent to the protruding portion 28c. It is a part. The volumes V1 and V3 formed by rotating the areas S1 and S3 with the central axis of the square can 11c as the axis of rotation have a volume portion reduced by the diameter reduction and a position where the end point T2 at the end of the diameter reduction is close to the protrusion 28c. It is an increased volume part. This is because, unlike the first embodiment, in the present embodiment, the reduced diameter portion 14 is provided on the bottom lid 15 side of the body portion 12, so that the contents can be accommodated up to the V3 (S3) portion. Therefore, by providing the end point T2 at the end of the diameter reduction on the protrusion 28c side of the bottom lid 15c, that is, at a position close to the protrusion 28c, the volume can be reduced by providing the diameter reduction portion 14c on the body portion 12c. It can be suppressed, and particularly when the area S3 is larger than the area S1, the volume reduction due to the reduced diameter portion 14a does not occur.

As described above, according to the square can 11c (11d) according to the present embodiment, the outer method of the winding portion 26c, which is the joint portion between the bottom lid 15c and the reduced diameter portion 14c, is the joining between the canopy 13d and the body portion 12d. Since it is formed smaller than the inner method of the winding tightening portion 18d, which is a portion, a plurality of square cans 11c and 11d can be easily stacked, and the load is less likely to collapse even when shaking such as an earthquake occurs. be able to. Then, since the end point of the reduced diameter portion 14c formed on the body portion 12c becomes a predetermined point T2 closely opposed to the protruding portion 28c formed by bending at the end portion of the bottom lid 15c, an increased capacity portion is formed. It is possible to compensate for the reduced capacity due to the reduced diameter.

(Third Embodiment)
Next, the square can according to the third embodiment of the present invention will be described with reference to FIGS. 9, 10A and 10B. Note that FIG. 10B is an enlarged end view of the P3 portion of FIG. 10A (contact portion between the canopy 13f and the bottom lid 15g). In the explanation of the present embodiment, the differences from the first embodiment will be mainly described, and the common points will be omitted as appropriate. Further, the components common to the first embodiment will be described using the same name, the same code, and the like.

As shown in FIG. 9, the square can 11f according to the present embodiment is formed of a steel plate having a predetermined thickness (for example, 0.32 mm) as in the first embodiment, and has a cylinder having a substantially square pillar shape. The canopy 13f is joined to one end of the portion 12f by winding, and the bottom lid 15f is joined to the other end by winding to form a structure in which both ends are sealed. Reinforcing beads are formed on each side surface of the body portion 12f by press working (the canopy 13f and the bottom lid 15f are also formed by pressing the reinforcing beads as in the first embodiment).

In the square can 11f according to the present embodiment, both ends of the body portion 12f, that is, the reduced diameter portion 14f1 is formed on the canopy 13f side and the additional reduced diameter portion 14f2 is formed on the bottom lid 15f side, and the reduced diameter portion 14f1 is formed. Is larger than the reduced diameter of the additional reduced diameter portion 14f2, and the outer method of the winding portion 18f which is the joint portion between the reduced diameter portion 14f1 and the canopy 13f (the outer dimension between the facing winding portions 18f) is added. It is characterized in that it is formed so as to be smaller than the inner method of the winding portion 26f which is the joint portion between the reduced diameter portion 14f2 and the bottom lid 15f (internal dimension between the facing winding portions 26f).

The canopy 13f is surrounded by a protruding portion 17f formed by bending when the canopy 13f is joined to the end portion (diameter reduced portion 14f1) of the body portion 12f by winding. A winding portion 18f, which is a joint portion between the canopy 13f and the reduced diameter portion 14f1, is formed at the tip of the protruding portion 17f. The bottom lid 15f is surrounded by a protruding portion 28f formed by bending when the bottom lid 15f is joined to the end portion (additional diameter reduced portion 14f2) of the body portion 12f by winding. A winding portion 26f, which is a joint portion between the bottom lid 15f and the additional diameter reduction portion 14f2, is formed at the tip of the protruding portion 28f.

In the square can 11f according to the present embodiment described above, the outer method of the winding portions 18f (outer dimensions between the opposing winding portions 18f) is the inner method of the winding portions 26f (between the opposing winding portions 26f). It is formed so as to be smaller than the internal dimension). Therefore, as shown in FIGS. 10A and 10B, when the square cans 11f and 11g according to the present embodiment are stacked vertically, the canopy of the square can 11f is inside the winding portion 26g of the bottom lid 15g of the square can 11g. Since the winding tightening portion 18f of 13f is located, stacking is easy and it is possible to suppress load collapse. In particular, if the outer method of the winding portion 18f of the canopy 13f of the square can 11f is slightly smaller than the inner method of the winding portion 26g of the bottom lid 15g of the square can 11g, the winding portions 18f and 26g are used. It will be engaged, and it will be possible to further suppress the collapse of the load.

As shown in FIG. 10B, the reduced diameter portion (LL4) of the reduced diameter portion 14f1 (starting point LT1, ending point LT2) which is the end portion of the body portion 12f on the canopy 13f side is the end portion of the body portion 12g on the bottom lid 15g side. The additional diameter-reduced portion 14g2 (start point ST1, end point ST2) is larger than the diameter reduction amount (SL4), and the outer method of the winding portion 18f is smaller than the inner method of the winding portion 26g. As described above, it is easy to stack and it is possible to prevent the load from collapsing. Further, the end points of the reduced diameters of the reduced diameter portion 14f1 (14g1) and the additional reduced diameter portion 14g2 (14f2) are close to the protruding portions 17f (17g) and 28g (28f) formed by bending at the end portions of the lid portion and the bottom portion. Since the predetermined points LT2 and ST2 face each other, it is possible to suppress a decrease in volume due to diameter reduction as compared with a conventional square can having a tapered portion on the body portion. In addition, instead of the additional diameter reduction portion 14g2, a diameter expansion portion (not shown) may be provided in which the end side of the body portion is expanded in diameter. The volume can be increased by providing the enlarged diameter portion, and the volume decrease due to the reduced diameter can be compensated by the enlarged diameter.

(Fourth Embodiment)
Next, the square can according to the fourth embodiment of the present invention will be described with reference to FIGS. 11, 12A and 12B. Note that FIG. 12B is an enlarged end view of the P4 portion of FIG. 12A. In the explanation of the present embodiment, the differences from the first embodiment will be mainly described, and the common points will be omitted as appropriate. Further, the components common to the first embodiment will be described using the same name, the same code, and the like.

As shown in FIG. 11, the square can 11h according to the present embodiment is formed of a steel plate having a predetermined thickness (for example, 0.32 mm) as in the first embodiment, and has a cylinder having a substantially square pillar shape. One end of the portion 12h is joined by the canopy 13h by winding, and the other end is joined by the bottom lid 15h by winding, and both ends are sealed. Reinforcing beads are formed on each side surface of the body portion 12h by press working as in the first embodiment (the canopy 13h and the bottom lid 15h are also formed by pressing the reinforcing beads as in the first embodiment. There.).

In the square can 11h according to the present embodiment, a diameter-expanding portion 19h that expands in diameter toward the tip side is formed at the end of the body portion 12h on the canopy 13h side, and the diameter-expanding portion 19h and the canopy 13h are joined. The inner method of the winding portion 18h, which is a portion (inner dimension between the facing winding portions 18h), is the outer method of the winding portion 26h, which is the joint portion between the end portion of the body portion 12h and the bottom lid 15h. The feature is that it is formed so as to be larger than the outer dimension between the winding tightening portions 26h).

As shown in FIGS. 12A and 12B, when two square cans 11h and 11k having the same shape and the same size according to the present embodiment are stacked one above the other, they are predetermined inside the winding portion 18h of the canopy 13h of the square can 11h. Since the winding portion 26k located on the outer periphery of the bottom lid 15k of the square can 11k is provided with a gap between the two, the load collapse can be suppressed without using a load collapse prevention holder or the like. By providing the enlarged diameter portion 19h (19k) on the canopy 13h (13k) side of the body portion 12h (12k), the capacity of the square can 11h (11k) is reduced as compared with the case where the reduced diameter portion is provided. Never. Further, when a predetermined gap is formed by the enlarged diameter portion 19h (19k) between the square cans arranged adjacent to each other in the horizontal direction, and it is necessary to keep the contents in the square cans 11h (11k) warm or cold by, for example, air conditioning. In addition, since a predetermined amount of air flow is secured, it is effective for storage in such a case. The diameter-expanded portion 19h is expanded with a predetermined point on the canopy 13h side end of the body portion 12h as a starting point and a predetermined point in front of the protruding portion 17h as an end point. The expanded diameter width Kf can be set from the aspects of manufacturing, standards, and the like. The height of the protruding portion 28k of the bottom lid 15k (the length in the same direction as the axial direction of the body portion 12k) H2 (for example, about 6.0 mm to 8.0 mm) is the height of the protruding portion 17h of the canopy 13h. (Length in the same direction as the axial direction of the body portion 12) It is formed larger than H1 (for example, about 3.0 mm to 3.5 mm). By setting the height H2 and the height H1 within the above length range, contact between the filling port, the hand ring, the washer, etc. (not shown) provided on the canopy 13h and the bottom lid 15k can be avoided, and these deformations can be made. Etc. can be prevented.

(Fifth Embodiment)
Next, the square can according to the fifth embodiment of the present invention will be described with reference to FIGS. 13, 14A and 14B. 14B is a partially enlarged end view of P5 of FIG. 14A. In the explanation of the present embodiment, the differences from the fourth embodiment will be mainly described, and the common points will be omitted as appropriate. Further, the components common to the fourth embodiment will be described using the same name, the same code, and the like.

As shown in FIG. 13, the square can 11 m according to the present embodiment is formed of a steel plate having a predetermined thickness (for example, 0.32 mm) as in the fourth embodiment, and has a cylinder having a substantially square pillar shape. One end of the portion 12m is joined by a canopy 13m by winding, and the other end is joined by a bottom lid 15m by winding, and both ends are sealed. Reinforcing beads are formed on each side surface of the body portion 12m by press working as in the fourth embodiment (the canopy 13m and the bottom lid 15m are also formed by pressing the reinforcing beads as in the fourth embodiment. There.).

Contrary to the fourth embodiment, the square can 11m according to the present embodiment has a diameter-expanded portion 19m formed at the end of the body portion 12m on the bottom lid 15m side, and has a diameter-expanding portion 19m and a bottom lid 15m. The inner method of the winding part 26m which is the joint part (inner dimension between the opposing winding parts 26m) is the outer method of the winding part 18m which is the joint part between the end part of the body part 12m and the canopy 13m. The feature is that it is formed so as to be larger than the outer dimension between the facing winding portions 18 m.

As shown in FIGS. 14A and 14B, when two square cans 11n and 11m having the same shape and the same dimensions according to the present embodiment are stacked one above the other, the winding portion of the bottom lid 15m of the square can 11m is stacked as described above. Since a predetermined gap is provided inside the 26 m and the winding portion 18n located on the outer periphery of the canopy 13n of the square can 11n enters, it is possible to prevent the load from collapsing without using a load collapse prevention holder or the like. .. By providing the enlarged diameter portion 19m (19n) on the bottom lid 15m (15n) side of the body portion 12m (12n), the capacity of the square can 11m (11n) is not reduced. Further, when a predetermined gap is formed by the enlarged diameter portion 19m (19n) between the square cans arranged adjacent to each other in the horizontal direction, and it is necessary to keep the contents in the square cans 11m (11n) warm or cold by, for example, air conditioning. In addition, since a predetermined amount of air flow is secured, it is effective for storage in such a case. The expanded diameter width Kf can be set from the aspects of manufacturing, standards, and the like.

As described above, in each embodiment of the present invention, the reduced diameter portion 14 or the enlarged diameter portion 19 is provided at the end of the body portion 12, and either the winding portion of the canopy 13 or the winding portion of the bottom lid 15 is provided. Since the outer method of is smaller than the inner method of the other, it is possible to stack in a state where the load does not easily collapse up and down. If the outer method of either the winding portion of the canopy 13 or the winding portion of the bottom lid 15 has a smaller size than the inner method of the other, a reduced diameter portion is provided on one of both ends of the body portion 12, and the other. In addition, a diameter-expanding portion may be provided at both ends of the body portion 12, and a diameter-expanding portion having a different diameter-expanding amount and an additional diameter-expanding portion may be provided at both ends of the body portion 12. Further, the square can is not limited to an 18 liter can, but may be a 9 liter square can or a square can of other sizes.

As described above, in the square can according to the present invention, in order to prevent the load from collapsing due to stacking during storage, the outer method of the joint with the body of one lid is different from that of the other lid and body. Since it is formed smaller than the inner method of the joint portion of the above, it has the effect of suppressing a decrease in the capacity inside the can, and is useful as a so-called square can such as an 18-liter can or a 9-liter can.

11 square cans (11a, 11b, 11c, 11d, 11f, 11g, 11h, 11k, 11m, 11n)
12 Body (12a, 12b, 12c, 12d, 12f, 12g, 12h, 12k, 12m, 12n)
13 Canopy (13a, 13c, 13d, 13f, 13h, 13k, 13m, 13n)
14 Reduced diameter part (14a, 14c, 14d, 14f1, 14g1)
14f2, 14g2 Additional diameter reduction part 15 Bottom lid (15b, 15c, 15d, 15f, 15g, 15h, 15k, 15m, 15n)
17 Protruding parts (17a, 17c, 17d, 17f, 17g, 17h)
18 winding part (18a, 18c, 18d, 18f, 18h, 18m, 18n)
19 Enlarged diameter part (19h, 19k, 19m, 19n)
26 winding part (26b, 26c, 26d, 26f, 26g, 26h, 26k, 26m)
28 protrusions (28c, 28f, 28g, 28k)
100 Metal plate material (steel plate)
101 Cylindrical body 102 Square cylindrical body 105a Inner mold 105b Outer mold

Claims (5)

The lids are joined to the open ends of the body, which is a substantially square cylinder, and the outer method of the joint between the bottom lid , which is one of the lids, and the body is the other lid . It is a square can formed smaller than the inner method of the joint between the canopy and the body.
The body portion is reduced in diameter starting from a predetermined point on the end side of the body portion on the bottom lid side and ending point at a predetermined point closely opposed to a protrusion formed by bending at the end portion of the bottom lid . A reduced diameter part is formed ,
The area of the portion surrounded by the extension line of the bottom lid, the protruding portion of the bottom lid, and the reduced diameter portion is the extension line of the bottom lid, the extension line of the body portion, and the reduced diameter portion. A square can in which the reduced diameter portion is formed so as to be larger than the area surrounded by . The axial length of the body portion between the end point and the tip of the protrusion is 40% or more of the axial length of the starting point and the tip of the protrusion, and the axial length of the protrusion. The square can according to claim 1, wherein the reduced diameter portion is formed so as to be smaller than the length of the above. Further, the body portion is reduced in diameter starting from a predetermined point on the end side of the body portion on the canopy side and ending point at a predetermined point close to the protrusion formed by bending at the end portion of the canopy . The square can according to claim 1 or 2 , wherein an additional reduced diameter portion having a reduced diameter portion different from that of the reduced diameter portion is formed. Further, the diameter of the body portion is expanded by starting from a predetermined point on the end side of the body portion on the canopy side and ending at a predetermined point in front of the protrusion formed by bending at the end portion of the canopy . The square can according to claim 1 or 2 , wherein the portions are formed. The joint portion is a winding portion formed by winding the end portion of the body portion and the end portion of the lid portion, and the outer method of the joint portion is the outer dimension between the facing winding portions. The square can according to any one of claims 1 to 4 , wherein the inner method of the joint portion is the inner dimension between the facing winding portions.

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