JPH11278489A - Container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize the amount of space when containers are conveyed or disposed of by a method wherein the amount of contraction in the center axis direction of the container is increased during a contraction operation, while the bulge of the container in the diametrical direction thereof is suppressed as much as possible. SOLUTION: An expandable, bellows-shaped peripheral wall B comprising a plurality of peripheral wall parts B1, B2 which can expand separately is formed on the body A of a container. The maximum outer diameter of the wall part B1 when it is contracted is made smaller than the minimum inner diameter of the wall pant B2 when it is contracted. And when the adjoining wall parts B1, B2 are contracted, at least a part of the wall part B1 is allowed to get into the wall part B2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container for storing liquids such as juice, beer, paints, medical liquids, and powders and powders such as coffee and powdered milk. A container having an elastic bellows-shaped peripheral wall formed on the body of the container body so that the bulk of the container in a state where the container is not contained can be reduced as much as possible to save space during transportation and disposal. About.

[0002]

2. Description of the Related Art Conventionally, as a bellows-shaped container of this kind,
(A) The maximum outer diameter of the plurality of chevron-shaped annular wall portions forming the bellows-shaped peripheral wall of the container body is set to the same diameter, and a pair is formed in the expansion and contraction direction of each of the chevron-shaped annular wall portions (container central axis direction). Each of the annular inclined wall walls is formed to bulge outward in an arc shape, and further, of the two annular inclined wall walls of each of the angled annular wall portions, one of the annular inclined wall walls located on the same side in the expansion and contraction direction is contracted. (For example, see Japanese Patent Application Laid-Open No. 8-72844), and (b) a plurality of bellows-like peripheral walls of the container body. The maximum outer diameter of the angled annular wall portion is configured to be larger as it is located at one end side in the direction of expansion and contraction, and the two annular sloped walls forming a pair in the direction of expansion and contraction of each of the angled annular wall portions (in the direction of the container center axis). Each bulges outwardly in an arc, and Of the two annular inclined wall walls of each angled annular wall portion, one annular inclined wall located on the same side in the expansion and contraction direction enters the inner peripheral surface side of the other annular inclined wall in an inverted state with the contraction operation. A configuration (for example, see Japanese Patent Application Laid-Open No. 7-5667) has been proposed.

[0003]

In both of the conventional containers, all the angled annular wall portions constituting the bellows-shaped peripheral wall of the container body or the angled annular portion of the portion to be compressed of the container body are required. On the other hand, when a compression operation force in the contraction direction is applied, one of the annular inclined wall portions located at the portion to which the compression operation force is applied enters the inner peripheral surface side of the other annular inclined wall wall in an inverted state. Therefore, the volume of the container body can be reduced by the amount of the entry. However, in the former conventional container (a), since the maximum outer diameter of the plurality of chevron-shaped annular walls constituting the bellows-shaped peripheral wall is configured to be the same diameter, the diameter direction of the container main body (perpendicular to the expansion and contraction direction). Direction), but even if the container body is contracted, one of the annular inclined wall portions constituting each angled annular wall portion is inverted and the inner peripheral surface side of the other annular inclined surface wall is formed. The bulk of the container main body could not be made lower than it could enter. Further, in the latter conventional container (b), the maximum outer diameter of the plurality of chevron-shaped annular walls constituting the bellows-shaped peripheral wall of the container main body is configured to be larger as it is located closer to one end in the expansion and contraction direction. For,
With the contraction operation, the small-diameter angled annular wall portion enters into the large-diameter angled annular wall portion, and one annular inclined surface wall constituting each angled annular wall portion is inverted and the other annular inclined surface wall becomes Since it enters the inner peripheral surface side, it can be configured to be less bulky than the former container, but there is a problem that the container main body is bulky in the diametric direction because one end side of the container main body protrudes outward in the diametrical direction. Was.

[0004] The present invention has been made in view of the above-mentioned circumstances, and its main problem is to minimize the bulging of the container in the diametric direction at the time of the shrinking operation while keeping the container in the central axis direction of the container. Is to increase the amount of shrinkage, thereby further promoting space saving during transportation and disposal.

[0005]

The container according to claim 1 of the present invention is characterized in that, in the aforesaid embodiment, the bellows-like peripheral wall is constituted by a plurality of bellows-like peripheral walls which can be individually extended and contracted. Among the two bellows-shaped peripheral wall portions adjacent in the expansion / contraction direction, the maximum outer diameter of one of the bellows-shaped peripheral wall portions when contracted is smaller than the minimum inner diameter of the other bellow-shaped peripheral wall portion when contracted, and the adjacent bellows-shaped peripheral wall portions are adjacent to each other. When both bellows-shaped peripheral wall portions are contracted, at least a part of one small-diameter side bellows-shaped peripheral wall portion is configured to enter the other large-diameter side bellows-shaped peripheral wall portion. According to the above characteristic configuration, the bellows-like peripheral wall of the container body is
Since it is composed of a plurality of bellows-like peripheral walls that can be individually expanded and contracted, only the bellows-like peripheral wall of the part of the container body that is desired to shrink can be freely contracted according to the state of reduction of the contents. However, when the bellows-shaped peripheral wall portion is contracted, at least a part of the adjacent one of the small-diameter side bellows-shaped peripheral wall portions enters the other large-diameter side bellows-shaped peripheral wall portion. Due to the synergistic action caused by contraction at the bellows-like peripheral wall, for example, the maximum outer diameter of the plurality of chevron-shaped annular walls constituting the bellows-like peripheral wall of the container main body is configured to be larger at one end in the expansion and contraction direction. Compared with the conventional container described above, it is possible to increase the amount of contraction in the central axis direction of the container body while reducing the amount of protrusion outward in the diameter direction. Therefore, while minimizing the bulk in the diameter direction of the container during the shrinking operation, the amount of shrinkage in the central axis direction of the container is increased, and the space saving during transportation or disposal is further promoted. it can.

The container according to the second aspect of the present invention is characterized in that the bellows-shaped peripheral wall portion is composed of a plurality of chevron-shaped annular wall portions that are continuous in the expansion / contraction direction, and that the bellows-shaped peripheral wall portion extends in the expansion / contraction direction of each chevron-shaped annular wall portion. One of the pair of annular inclined walls is
The point is that it is configured to enter into the inner peripheral surface side of the other annular inclined surface wall while reversing as the contracting operation. According to the above-mentioned characteristic configuration, when the plurality of bellows-like peripheral walls constituting the bellows-like peripheral wall of the container main body are contracted, each of the plurality of chevron-shaped annular wall parts constituting each bellows-like peripheral wall is formed on both sides thereof. Since one side of the annular inclined wall is folded into a contracted position in which one of the walls is inverted into the other inner peripheral surface and the contracted position is maintained, a special band such as a band for holding the container body in the contracted state is maintained. There is no need to prepare a separate holding member,
It is possible to simplify the structure of the container body and simplify the contraction operation.

A feature of the container according to the third aspect of the present invention is that the container inverts into the large-diameter bellows-like peripheral wall between the adjacent bellows-like peripheral walls as the two bellows-like peripheral walls contract. The point is that an inverted peripheral wall portion is formed. According to the above-described characteristic configuration, when a compressive operation force in the contraction direction is applied to the container body, the inverted peripheral wall formed between the adjacent two bellows-shaped peripheral walls enters the large-diameter side bellows-shaped peripheral wall while being inverted. The adjacent small-diameter side bellows-shaped peripheral wall and the large diameter side bellows-shaped peripheral wall can smoothly enter each other and be guided. Therefore, for example, the contraction operation of each bellows-shaped peripheral wall portion of the container body is performed in comparison with the case where the peripheral wall portion located between the adjacent both bellows-shaped peripheral wall portions is configured to be a flexible thin film or a film-like shape. It can be performed reliably and easily.

According to a fourth aspect of the present invention, there is provided a container according to a fourth aspect of the present invention, wherein all of the shrink-operated bellows-shaped peripheral wall portions of the container body are engaged and held in a compressed state as compared with the contraction operation. Is provided. According to the above-mentioned characteristic configuration, all of the bellows-shaped peripheral wall portions can be engaged and held in a compressed state as compared with the contraction operation by the engagement holding means provided on the container main body. In this case, the amount of shrinkage can be increased, and space saving during transportation and disposal can be further promoted. Moreover,
Even if external force is applied to the container, it is easy to prevent the container that has been contracted from being inadvertently released from contraction, and to use the limited container storage space reliably and effectively when transporting or disposing of the container. Can be.

The container according to claim 5 of the present invention is characterized in that a maximum outer diameter of a plurality of chevron-shaped annular wall portions constituting at least one of the bellows-like peripheral wall portions is as follows.
The point is that one end side in the expansion and contraction direction has a larger diameter.
According to the above-mentioned characteristic configuration, when the container body is contracted, as much as the small-diameter angled annular wall portion enters the large-diameter angled annular wall portion along with the contraction operation, the container central axis direction is reduced. Can be further increased, and space saving during transportation and disposal can be further promoted.

The container according to claim 6 of the present invention is characterized in that the engaging means is formed in an engaging portion and an engaged portion which are formed at portions of the container body opposite to each other in the direction of expansion and contraction of the mouth and the bottom. In that it is composed of According to the above-mentioned characteristic configuration, when the container main body is compressed along the expansion / contraction direction, each of the plurality of bellows-like peripheral wall portions constituting the bellows-like peripheral wall of the container main body is contracted, and further, compared to the contracted operation state. When compressed, the engaging portion and the engaged portion provided at opposing portions on the mouth side and the bottom side in the container body engage. Therefore,
With a series of contraction operations on the container body, the engagement portion and the engaged portion constituting the engagement means can be engaged with each other, so that a special operation for the engagement means is unnecessary, and With the provision of the engagement means, the contraction operation of the bellows-like peripheral wall of the container and the engagement operation in the maximum contraction state can be performed quickly and easily.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] FIGS.
As an example of the container of the present invention, a plastic bottle for soft drink molded mainly with polyethylene dephthalate (PET) is shown. A bellows-shaped peripheral wall B that can be extended and contracted along the direction of the central axis X is formed, and a cap 4 is detachably screwed to the mouth 3 of the container body A.

The bellows-like peripheral wall B is composed of two bellows-like peripheral walls B1 and B2 which can be individually extended and retracted in a plurality of stages in the direction of the central axis X (extending and contracting direction).
The maximum outer diameter D1 at the time of contraction of one of the bellows-shaped peripheral wall portions B1 of the two bellows-shaped peripheral wall portions B1 and B2 adjacent in the direction,
The minimum inner diameter D2 when the other bellows-shaped peripheral wall portion B2 contracts
And both adjacent bellows-shaped peripheral wall portions B
When both B1 and B2 are contracted, at least a portion of one of the small-diameter bellows-shaped peripheral wall portions B1, preferably all or almost all of the small-diameter-side bellows-shaped peripheral wall portion B1, becomes the other large-diameter-side bellows-shaped peripheral wall portion. It is configured to enter the part B2.

Each of the bellows-shaped peripheral wall portions B1 and B2 has a plurality of chevron-shaped annular wall portions 1A continuous in a waveform in the direction of the central axis X.
And a central axis X of each angled annular wall portion 1A.
Each of the two annular inclined surface walls 1a and 1b forming a pair in the direction is formed so as to bulge outward in an arc shape, and the center of the two annular inclined surface walls 1a and 1b of each angled annular wall portion 1A. An annular inclined wall 1a located on one side in the axis X direction
Is slightly smaller than the diametrical width of the annular inclined wall 1b located on the other side of the central axis X direction, and the one annular inclined wall 1
a is configured to enter the inner peripheral surface side of the other annular inclined surface wall 1b in an immersed state while being elastically inverted. The one annular inclined wall 1a which has entered the inner peripheral surface side of the other annular inclined wall 1b in a state of being immersed is maintained in the entering posture unless an external force in the pulling direction enough to reverse the annular inclined wall 1a acts. You. The annular connecting wall 1c connecting the two annular inclined surfaces 1a and 1b of each of the angled annular wall portions 1A is formed in a semi-cylindrical shape, and a compressive operation force in the central axis X direction is applied to the container body A. At this time, one annular inclined surface wall 1a of the angled annular wall portion 1A is inverted by elastic deformation with the annular connecting wall 1c substantially as a fulcrum, while elastically deforming the annular connecting wall 1c slightly to the diameter increasing side. It is configured.

The peripheral wall portion 2 located between the adjacent bellows-like peripheral wall portions B1 and B2 bulges outward in an arc shape like the both annular inclined surface walls 1a and 1b of the chevron annular wall portion 1A. When the operation force in the direction of the central axis X is applied to the container body A, the container body A is configured to be capable of reversing by elastic deformation of the container body A. It is constituted by a reversing peripheral wall portion which inverts and enters the large diameter side bellows-like peripheral wall portion 1B with the contraction operation of B1 and B2. The reversing peripheral wall portion 2 that has entered the large-diameter-side bellows-shaped peripheral wall portion 1B while being reversed is maintained in the entering posture unless an external force in the pulling direction enough to reverse the reversing peripheral wall portion 2 acts. The amount of displacement in the direction of the central axis X due to the reversal of the reversal peripheral wall 2 is at least the bellows-like peripheral wall B
The minimum unit contraction amount at 1 and B2, in other words, is larger than the displacement amount in the central axis X direction due to the reversal of one annular inclined wall 1a in the angled annular wall portion 1A. Preferably, as in the first embodiment, the displacement amount in the central axis X direction due to the reversal of the reversal peripheral wall portion 2 is reduced by the contraction operation of all or almost all of the one small-diameter side bellows-shaped peripheral wall portion B1. The displacement amount is configured to enter into the operated large-diameter-side bellows-shaped peripheral wall portion B2.

When a compressive force is applied to the used container body A in the direction of the central axis X, the bellows-shaped peripheral wall portion B is applied.
1 and B2, each of the annular inclined wall portions 1A and 1b of each angled annular wall portion 1A, which is located on one side in the central axis X direction, is the other in the central axis X direction. And enters the inner peripheral surface side of the annular inclined surface wall 1b which is located on the inner side in an immersed state while being elastically inverted, and the inverted peripheral wall portion 2 located between the two bellows-shaped peripheral wall portions B1 and B2 has a large diameter side. All or almost all of the one small-diameter side bellows-shaped peripheral wall portion B1 that has entered the bellows-shaped peripheral wall portion 1B while being elastically inverted and contracted is inside the other large-diameter side bellows-shaped peripheral wall portion B2 that has been contracted. Will get into it. Therefore, the synergistic effect of the contraction effect by the reversal of each annular inclined surface wall 1a at the both bellows-shaped peripheral wall portions B1 and B2 and the contraction effect by the contraction operation of the two bellows-shaped peripheral wall portions B1 and B2 enter each other, Since the entire container main body A can be compactly compressed, it is possible to improve the storage efficiency of the container in a limited space, and at the same time, it is possible to transport a large amount of containers at a time, thereby improving the transportation efficiency. Can be planned. In the first embodiment, only one of the bellows-shaped peripheral wall portions B1 and B2 can be contracted, and only a part of each of the bellows-shaped peripheral wall portions B1 and B2 can be selectively contracted. Can also be operated.

[Second Embodiment] In the above-described first embodiment, the bellows-shaped peripheral wall B of the container body A is individually formed on the center axis X.
Bellows-like peripheral wall portions B that can be expanded and contracted in multiple stages in different directions
1 and B2, as shown in FIGS. 3 and 4, the bellows-shaped peripheral wall B1 of the container body A can be individually expanded and contracted in a plurality of stages in the direction of the central axis X. , B
2, B3. That is, in the container of the second embodiment, of the two bellows-shaped peripheral wall portions B1, B2, and B3 adjacent in the central axis X direction (expansion and contraction direction), the first bellows-shaped peripheral wall located at one end side in the central axis X direction is used. The maximum outer diameter D1 at the time of contraction of the portion B1 is configured to be smaller than the minimum inner diameter D2 at the time of contraction of the second bellows-shaped peripheral wall portion B2 located at the center in the central axis X direction, and the second bellows-like shape is formed. Surrounding wall B2
Is smaller than the minimum inner diameter D4 of the third bellows-shaped peripheral wall portion B3 located on the other end side in the direction of the central axis X when contracted. Then, when the three adjacent bellows-shaped peripheral wall portions B1, B2, and B3 are contracted, at least a part of the first bellows-shaped peripheral wall portion B1 on the minimum diameter side, preferably, the entirety of the first bellows-shaped peripheral wall portion B1 is provided. Alternatively, substantially all of the second bellows-shaped peripheral wall portion B2 on the middle diameter side is configured to enter into the second bellows-shaped peripheral wall portion B2, and at least a part of the second bellows-shaped peripheral wall portion B2 on the middle diameter side, preferably, the second bellows-shaped peripheral wall portion B2 is formed. All or almost all of the peripheral wall portion B2 is configured to enter the third bellows-shaped peripheral wall portion B3 on the maximum diameter side. Since the other configuration is the same as the configuration described in the first embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

[Third Embodiment] In the first embodiment described above, the bellows-shaped peripheral wall B of the container body A is individually formed on the center axis X.
Two bellows-like peripheral walls B that can be freely expanded and contracted in multiple stages in different directions
1 and B2, but as shown in FIGS. 5 and 6, the bellows-shaped peripheral wall B1 of the container body A can be individually expanded and contracted in a plurality of stages in the central axis X direction by four bellows-shaped peripheral wall portions B1. , B
2, B3, and B4. That is, in the container of the third embodiment, of the two bellows-shaped peripheral wall portions B1, B2, B3, and B4 adjacent in the central axis X direction (extending and contracting direction), the first bellows located on one end side in the central axis X direction. The maximum outer diameter D1 at the time of contraction of the first peripheral wall portion B1 is equal to the first bellows-like peripheral wall portion B1.
The second inner bellows-shaped peripheral wall portion B2 is formed smaller than the minimum inner diameter D2 when the second bellows-shaped peripheral wall portion B2 is contracted, and is formed continuously on the second bellows-shaped peripheral wall portion B2. Maximum outer diameter D3 at the time of contraction of the bellows-like peripheral wall portion B3
However, it is configured to be smaller than the minimum inner diameter D2 when the second bellows-shaped peripheral wall portion B2 contracts. Further, the maximum outer diameter D4 when the fourth bellows-shaped peripheral wall B4 at the other end continuously formed on the third bellows-shaped peripheral wall B3 is contracted is the minimum inner diameter when the third bellows-shaped peripheral wall B3 is contracted. It is configured smaller than D5. That is, the maximum outer diameter D1 when the first bellows-shaped peripheral wall B1 contracts, the minimum inner diameter D2 when the second bellows-shaped peripheral wall B2 contracts, and the maximum outer diameter D3 when the third bellows-shaped peripheral wall B3 contracts. And the minimum inner diameter D5 and the maximum outer diameter D4 when the fourth bellows-shaped peripheral wall portion B4 contracts.
The relationship D2>D3>D1>D5> D4 is established.
Then, four adjacent bellows-like peripheral wall portions B1, B2, B
3 and B4 are contracted, the first bellows-shaped peripheral wall portion B1
At least a portion, preferably the first bellows-shaped peripheral wall portion B1
Of the second bellows-shaped peripheral wall portion B2 having the largest diameter
And at least a part of the third bellows-like peripheral wall B3, preferably all or almost all of the third bellows-like peripheral wall B3, has a maximum diameter of the second bellows-like peripheral wall B2. So that at least a part of the fourth bellows-like peripheral wall portion 4, preferably all or almost all of the fourth bellows-like peripheral wall portion B4 enters the third bellows-like peripheral wall portion B3. Is configured. Since the other configuration is the same as the configuration described in the first embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

[Fourth Embodiment] In the first embodiment described above, the bellows-shaped peripheral wall B of the container body A is individually formed on the central axis X.
Bellows-like peripheral wall portions B that can be expanded and contracted in multiple stages in different directions
1 and B2, as shown in FIGS. 7 and 8, the bellows-shaped peripheral wall B of the container body A can be individually extended and retracted in a plurality of stages in the direction of the central axis X by four bellows-shaped peripheral wall portions B1. , B
2, B3, and B4. That is, in the container according to the fourth embodiment, of the bellows-shaped peripheral wall portions B1, B2, B3, and B4 that are continuous in the central axis X direction, the first bellows-shaped peripheral wall portion B1 located at one end side in the central axis X direction is formed. The minimum inner diameter D1 at the time of contraction is configured to be larger than the maximum outer diameter D2 at the time of contraction of the second bellows-like peripheral wall B2 on the central side formed continuously with the first bellows-like peripheral wall B1. The minimum inner diameter D3 at the time of contraction of the third bellows-like peripheral wall portion B3 on the center side continuously formed on the second bellows-like peripheral wall portion B2 is the maximum outer diameter D2 at the time of contraction of the second bellows-like peripheral wall portion B2, and
The outer diameter D4 is larger than the maximum outer diameter D4 when the fourth bellows-shaped peripheral wall B4 at the other end formed continuously with the third bellows-shaped peripheral wall B3 is contracted. That is, the minimum inner diameter D1 when the first bellows-shaped peripheral wall B1 is contracted, the maximum outer diameter D2 when the second bellows-shaped peripheral wall B2 is contracted, and the minimum inner diameter D3 when the third bellows-shaped peripheral wall B3 is contracted. And the maximum outer diameter D4 at the time of contraction of the fourth bellows-shaped peripheral wall portion B4, D1 =
It is configured so that D3> D2 = D4. Then, when the four adjacent bellows-shaped peripheral wall portions B1, B2, B3, and B4 are contracted, at least a portion of the second bellows-shaped peripheral wall portion B2, preferably, all or substantially all of the second bellows-shaped peripheral wall portion B2 is formed. The whole is configured to enter the first bellows-shaped peripheral wall portion B1, and at least a part of the fourth bellows-shaped peripheral wall portion B4, preferably, all or almost all of the fourth bellows-shaped peripheral wall portion B4 is It is configured to enter the third bellows-shaped peripheral wall portion B3. The second bellows-shaped peripheral wall portion B2 is
It is possible to enter the inside of the first bellows-shaped peripheral wall portion B1 and the inside of the third bellows-shaped peripheral wall portion B3. Since the other configuration is the same as the configuration described in the first embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

[Fifth Embodiment] In the first embodiment described above, the bellows-shaped peripheral wall B of the container body A is individually attached to the central axis X.
Bellows-like peripheral wall portions B that can be expanded and contracted in multiple stages in different directions
1 and B2, as shown in FIGS. 9 and 10,
Four bellows-like peripheral wall portions B1, B capable of individually expanding and contracting the bellows-like peripheral wall B of the container body A in a plurality of stages in the central axis X direction.
2, B3, and B4. That is, in the container of the fifth embodiment, of the bellows-shaped peripheral wall portions B1, B2, B3, and B4 that are continuous in the central axis X direction, the first bellows-shaped peripheral wall portion B1 located at one end side in the central axis X direction is formed. The maximum outer diameter D1 at the time of contraction is configured to be smaller than the minimum inner diameter D2 at the time of contraction of the second bellows-like peripheral wall B2 on the center side continuously formed with the first bellows-like peripheral wall B1. The maximum outer diameter D3 at the time of contraction of the third bellows-like peripheral wall B3 on the center side continuously formed with the second bellows-like peripheral wall B2 is the minimum inside diameter D2 at the time of the contraction of the second bellows-like peripheral wall B2, and
The other end side of the fourth bellows-shaped peripheral wall portion B3 formed continuously with the third bellows-shaped peripheral wall portion B3 is configured to be smaller than the minimum inner diameter D4 when contracted. That is, the maximum outer diameter D1 when the first bellows-shaped peripheral wall portion B1 is contracted, the minimum inner diameter D2 when the second bellows-shaped peripheral wall portion B2 is contracted, and the maximum outer diameter when the third bellows-shaped peripheral wall portion B3 is contracted. D3 and the minimum inner diameter D4 at the time of contraction of the fourth bellows-shaped peripheral wall portion B4 are represented by D1 =
It is configured such that D3 <D2 = D4. Then, when the four adjacent bellows-shaped peripheral wall portions B1, B2, B3, and B4 are contracted, at least a part of the first bellows-shaped peripheral wall portion B1, preferably, all or substantially all of the first bellows-shaped peripheral wall portion B1 is formed. The whole is configured to enter into the second bellows-shaped peripheral wall portion B2, and at least a part of the third bellows-shaped peripheral wall portion B3, preferably, all or almost all of the third bellows-shaped peripheral wall portion B3, It is configured to enter the fourth bellows-shaped peripheral wall portion B4. The third bellows-shaped peripheral wall portion B3 is
It is possible to enter the inside of the second bellows-shaped peripheral wall portion B2 and the inside of the fourth bellows-shaped peripheral wall portion B4. Since the other configuration is the same as the configuration described in the first embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

Sixth Embodiment As shown in FIGS. 11 and 12, in the telescopic container described in the first embodiment, the container body A is provided with a bellows-shaped peripheral wall B1, which has been contracted. It is also possible to provide an engaging and holding means C for engaging and holding all of B2 in a compressed state as compared with the contraction operation. This engagement holding means C is provided with an engagement portion 6 formed at a portion of the container main body A which opposes the opening 3 and the bottom 5 in the direction of expansion and contraction.
And the engaged portion 7. The engaged portion 7
Is formed of an annular fitting groove formed on the inner peripheral surface of the mouth portion 3 of the container body A, and the engaging portion 6 is elastically fitted in the fitting groove 7 in the expansion and contraction direction. In combination, from the bottom portion 5 of the container body A, all the bellows-shaped peripheral wall portions B1 and B2 subjected to the contraction operation are engaged and held against the elastic restoring force in a state of being compressed from the time of the contraction operation. It is composed of a fitting projection that is bulged out. That is, FIG.
As shown in FIG. 5, when the bellows-shaped peripheral wall portions B1 and B2 are only contracted, the fitting projection 6 formed on the bottom portion 5 of the container body A and the inner peripheral surface of the mouth portion 3 of the container body A are formed. The distance from the fitted groove 7 in the contraction direction in the contraction direction is a further contraction operation amount of the bellows-shaped peripheral wall portions B1, B2 contracted. Since the other configuration is the same as the configuration described in the first embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

Seventh Embodiment In the first embodiment described above, the maximum outer diameter of the plurality of chevron-shaped annular wall portions 1A constituting the bellows-shaped peripheral wall portions B1 and B2 of the container body A is set to the same diameter. However, as shown in FIGS. 13 and 14, a plurality of chevron-shaped annular wall portions 1 constituting the bellows-shaped peripheral wall portions B1 and B2 are provided.
The maximum outer diameter of A may be configured to be larger toward one end in the expansion and contraction direction. When the container body A is contracted, the small-diameter angled annular wall portion 1A enters the large-diameter angled annular wall portion 1A with the contraction operation at each of the bellows-shaped peripheral wall portions B1 and B2. In addition, the amount of shrinkage of the container body A in the direction of the central axis X can be further increased, and the space saving during transportation and disposal can be further promoted. The maximum outer diameter of the plurality of chevron-shaped annular wall portions 1A constituting at least one of the bellows-shaped peripheral wall portions B1 and B2 is made larger at one end side in the expansion and contraction direction. Is also good. In addition, since the other configuration is the same as the configuration described in the first embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

Other Embodiments (1) As the engagement holding means C, all the bellows-shaped peripheral wall portions B1 and B2 that have been contracted are engaged and held in a state where they are compressed more than at the time of the contraction operation. If you can
Any structure may be employed. (2) When the engagement holding means C is not formed on the container, the bellows-shaped peripheral wall portions B1 and B2 which have been contracted.
It is advisable to use a tightening tool such as a string or a band that tightens all of them in a state of being compressed more than the contraction operation. (3) In each of the above-described embodiments, the inverted peripheral wall portion 2 is formed between the adjacent bellows-shaped peripheral wall portions so that the inverted peripheral wall portion 2 enters the large-diameter side bellows-shaped peripheral wall portion while being inverted as the both bellow-shaped peripheral wall portions are contracted. However, the present invention is not limited to this configuration. For example,
When the peripheral wall portion located between the adjacent bellows-shaped peripheral wall portions is formed into a flexible thin wall or a film shape, and the adjacent both bellows-shaped peripheral wall portions are contracted by folding or folding the flexible peripheral wall portion, At least a part of one small-diameter bellows-shaped peripheral wall portion may be configured to enter the other large-diameter side bellows-shaped peripheral wall portion. (4) In each of the above-described embodiments, each of the plurality of chevron-shaped annular wall portions constituting each of the bellows-shaped peripheral wall portions is caused to enter one of the annular inclined surface walls thereof into the other inner peripheral surface side in an inverted state. Although the container main body A is configured to be folded to the contracted posture and to maintain the contracted posture, the present invention is not limited to the container main body A having such a form. Each of the plurality of chevron annular wall portions constituting the portion is individually expandable and contractible in a plurality of stages in the central axis X direction, and the elasticity of each chevron annular wall portion when the operating force in the compression direction is released. The container body may be configured to return to its original shape by a restoring force. In this case, it is preferable to use a tightening tool such as a string or a band for holding the container body in a contracted state.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a container according to a first embodiment of the present invention when the container is extended.

FIG. 2 is a longitudinal sectional view when the container is contracted.

FIG. 3 is a partially cutaway front view of a container according to a second embodiment of the present invention when the container is extended.

FIG. 4 is a longitudinal sectional view when the container is contracted.

FIG. 5 is a partially cutaway front view showing a third embodiment of the present invention when the container is extended.

FIG. 6 is a longitudinal sectional view when the container is contracted.

FIG. 7 is a partially cutaway front view of a container according to a fourth embodiment of the present invention when the container is extended.

FIG. 8 is a longitudinal sectional view when the container is contracted.

FIG. 9 is a partially cutaway front view of a container according to a fifth embodiment of the present invention when the container is extended.

FIG. 10 is a longitudinal sectional view when the container is contracted.

FIG. 11 is a longitudinal sectional view of a container according to a sixth embodiment of the present invention at the time of contraction engagement.

FIG. 12 is a longitudinal sectional view when the container is contracted.

FIG. 13 is a partially cutaway front view of a container according to a seventh embodiment of the present invention when the container is extended.

FIG. 14 is a longitudinal sectional view when the container is contracted.

[Explanation of symbols]

 A Container body B Bellows-like peripheral wall B1 Bellows-like peripheral wall B2 Bellows-like peripheral wall B3 Bellows-like peripheral wall B4 Bellows-like peripheral wall C Engaging part 7 Engaged part

Claims (6)

[Claims] 1. A container having a bellows-shaped peripheral wall which can be extended and contracted on a body portion of a container body, wherein the bellows-shaped peripheral wall is constituted by a plurality of bellows-shaped peripheral walls which can be individually extended and contracted. Of the two adjacent bellows-like peripheral walls in the direction, the maximum outer diameter of one of the bellows-like peripheral walls at the time of contraction is made smaller than the minimum inner diameter of the other bellows-like peripheral wall at the time of contraction. A container configured such that when the bellows-shaped peripheral wall portion is contracted, at least a part of one of the small diameter side bellows-shaped peripheral wall portions enters the other large diameter side bellows-shaped peripheral wall portion. 2. The bellows-shaped peripheral wall portion is composed of a plurality of chevron annular wall portions that are continuous in the direction of expansion and contraction.
2. The structure according to claim 1, wherein one of the pair of annular sloped walls forming a pair in the direction of expansion and contraction of each angled annular wall portion enters the inner peripheral surface side of the other annular sloped wall while reversing with the contraction operation. Container. 3. An inverting peripheral wall portion is formed between the adjacent bellows-shaped peripheral wall portions so as to be inverted and enter the large-diameter side bellows-shaped peripheral wall portion as the two bellows-shaped peripheral wall portions are contracted. 3. The container according to 1 or 2. 4. The container main body is provided with engagement holding means for engaging and holding all of the bellows-shaped peripheral wall portions that have been contracted and operated in a compressed state as compared with the time of the contraction operation.
4. The container according to 2 or 3. 5. A maximum outer diameter of a plurality of chevron annular wall portions constituting at least one of the bellows-shaped peripheral wall portions is configured to be larger at one end side in the expansion and contraction direction. 3. The container according to 2. 6. The container according to claim 4, wherein the engaging means comprises an engaging portion and an engaged portion formed at portions of the container body opposite to each other in the direction of expansion and contraction of the mouth and the bottom. container.