Abstract:
A bottle-shaped resin container with a bottle body and a cap, the container being configured to determine whether the seal has been broken by: the container having a long, tall cylindrical section between a neck ring and a flange that connects the neck ring and the flange; and when the cap body is rotated in the unscrewing direction, bridges being broken and the cap ring separating from the cap body and falling by its own weight so that the lower surface thereof contacts the flange and remains above the flange, exposing the side surface of the long, tall cylindrical-section between the upper surface of the cap ring and the lower surface of the neck ring. As the side surface of the long, tall cylindrical section is a straight line when viewed from the front, it is possible to determine the taper angle definitively and the taper angle is 60-80 degrees.

Description:
TECHNICAL FIELD 
       [0001]    The present invention relates to a bottle-shaped resin container typified by a PET bottle. 
       BACKGROUND ART 
       [0002]    A container mentioned in Patent Literature 1 is a representative example of a conventional bottle-shaped resin container. 
         [0003]    The bottle-shaped resin container mentioned in Patent Literature 1 will be described with reference to  FIGS. 24 and 25 . 
         [0004]    A bottle-shaped resin container  100  shown in  FIG. 24  has a plastic bottle main body  102  and a plastic cap  104 . 
         [0005]    The bottle main body  102  includes a neck portion  106  and a body portion  108 , which are integrally formed. The neck portion  106  has, on its outer periphery, a male threaded portion  110  as well as an annular jaw portion  112  and an annular flange portion  114  each forming a horizontally projecting portion, the male threaded portion, the jaw portion and the flange portion being formed downward from above in this order. The body portion  108  is a container portion which is filled with content such as drinking water. 
         [0006]    The cap  104  includes a cap main body  116 , a cap ring  118 , and bridges  120  connecting the cap main body  116  and the cap ring  118  to each other. 
         [0007]    The cap main body  116  has a female threaded portion  122  formed on its inner periphery, the female threaded portion  122  being screwed onto the male threaded portion  110 . Screwing of the female threaded portion  122  onto the male threaded portion  110  allows the neck portion  106  to be closed by the cap  104 . 
         [0008]    The cap ring  118  is in a ring shape and its upper end is connected to the lower end of the cap main body  116  via the bridges  120  which are large in number. The cap ring  118  is formed so as to have a slightly larger internal diameter than the external diameter of the jaw portion  112  so that the cap ring  118  is fitted onto the jaw portion with a slight gap formed outside the jaw portion  112 . Inside the cap ring  118 , a plurality of stoppers  124  which are capable of engagement with the lower end of the jaw portion  112  from below are formed in a circumferential direction at a predetermined pitch so as to project in a direction toward the axis. 
         [0009]    When the cap  104  is screwed onto the neck portion  106  of the bottle main body  102  after the bottle main body  102  is filled with content such as drinking water, the stoppers  124  are configured so that their upper ends are engaged with the lower surface of the jaw portion  112  after the stoppers  124  pass around the jaw portion  112 . Then, in discharging the content from the bottle main body  102 , the cap main body  116  is rotated in a direction in which the female threaded portion  122  is unscrewed from the male threaded portion  110 , whereby the bridges  120  are broken by shear force. Thereafter, further rotation of the cap main body  116  in the same direction causes the cap  104  to be separated from the neck portion  106  and the state is as shown in  FIG. 25 . In such a state, the lower surface of the cap ring  118  approaches the upper surface of the flange portion  114  and the cap ring  118  is sandwiched between the jaw portion  112  and the flange portion  114  in a vertically immovable state. 
       CITATION LIST 
     Patent Literature 
       [0010]    Patent Literature 1: JP 2002-370760 A 
       SUMMARY OF INVENTION 
     Technical Problems 
       [0011]    Since a conventional bottle-shaped resin container as described in Patent Literature 1 has the above-described configuration, it has been difficult to determine whether the cap is not opened yet or is closed after it is once opened and the container is filled with content again. Further, it is necessary to remove the cap ring  118  for sorting at the time of disposal of the bottle-shaped resin container but it has been difficult to remove the cap ring  118  because the cap ring  118  is sandwiched between the jaw portion  112  and the flange portion  114  and cannot be vertically moved as described above. 
         [0012]    The present invention aims at solving the foregoing problems. 
         [0013]    More specifically, an object of the present invention is to provide a bottle-shaped resin container capable of easily determining whether the container is not opened, and moreover having a cap ring which can be easily removed. 
       Solution to Problems 
       [0014]    The inventor of the present invention has made an intensive study to solve the foregoing problems and completed the present invention. 
         [0015]    The present invention provides the following (1) to (6). 
         [0000]    (1) A bottle-shaped resin container comprising: 
         [0016]    a bottle main body; and a cap, 
         [0017]    wherein the bottle main body comprises a neck portion and a body portion which are integrally formed, 
         [0018]    wherein the neck portion has, on its outer periphery, a male threaded portion as well as an annular jaw portion and an annular flange portion each forming a horizontally projecting portion, the male treaded portion, the jaw portion and the flange portion being formed downward from above in this order, 
         [0019]    wherein the cap comprises a cap main body, a cap ring, and at least one bridge connecting the cap main body and the cap ring to each other, 
         [0020]    wherein the cap main body is configured to include a female threaded portion formed on an inner periphery of the cap main body to be screwed onto the male threaded portion such that the female threaded portion is screwed onto the male threaded portion to allow the cap to close the neck portion, 
         [0021]    wherein the cap ring is in a ring shape, an upper end of the cap ring is connected to a lower end of the cap main body via the at least one bridge, the cap ring is formed to have a larger internal diameter than an external diameter of the jaw portion so that the cap ring is fitted on the jaw portion with a gap formed outside the jaw portion, and at least one stopper capable of engagement with a lower end of the jaw portion from below is formed inside the cap ring so as to project in a direction toward an axis such that when the cap is screwed onto the neck portion after filling the bottle main body with content, an upper end of the at least one stopper is engaged with a lower surface of the jaw portion after the at least one stopper passes around the jaw portion, 
         [0022]    wherein a high-height cylindrical portion connecting the jaw portion and the flange portion to each other is provided between the jaw portion and the flange portion, 
         [0023]    wherein the high-height cylindrical portion has a height (H) of 10 to 20 mm, 
         [0024]    wherein the high-height cylindrical portion has a lateral surface of a linear profile when seen from a front, which allows a taper angle to be determined unambiguously, the taper angle ranging from 60° to 80°, 
         [0025]    wherein the at least one bridge is formed on an outer peripheral side of the cap ring, and 
         [0026]    wherein when the cap main body is rotated in a direction in which the female threaded portion is unscrewed from the male threaded portion, thus discharging the content from the bottle main body, the at least one bridge is broken by shear force to separate the cap ring from the cap main body, and as a result the cap ring drops down due to its own weight in a state in which the axis extends in a vertical direction so that its lower surface comes into contact with the flange portion, the cap ring remains on the flange portion and the lateral surface of the high-height cylindrical portion is exposed between an upper surface of the cap ring and the lower surface of the jaw portion, which makes it possible to determine that the cap is already opened. 
         [0000]    (2) The bottle-shaped resin container according to (1), wherein a difference (H−h) between the height (H) of the high-height cylindrical portion and a height (h) of the cap ring is at least 3 mm.
 
(3) The bottle-shaped resin container according to (1) or (2), wherein the height (H) of the high-height cylindrical portion and a height (h) of the cap ring satisfy a relation of H≧1.5×h.
 
(4) The bottle-shaped resin container according to any one of (1) to (3), wherein the bottle-shaped resin container
 
         [0027]    has a marking which is formed on surfaces of the cap main body and the cap ring so as to lie on both the cap main body and the cap ring in a state in which the cap is not opened, and the cap main body and the cap ring are connected to each other via the at least one bridge, and 
         [0028]    is configured such that the at least one bridge is broken by cap opening to cause the cap ring to be separated from the cap main body and drop down to come into contact with the flange portion, which makes it possible to determine that the cap is already opened because in a case where the cap is closed again, the marking is not restored to a same state as before the cap opening. 
         [0000]    (4) A bottle-shaped resin container comprising: 
         [0029]    a bottle main body; and a cap, 
         [0030]    wherein the bottle main body comprises a neck portion and a body portion which are integrally formed, 
         [0031]    wherein the neck portion has, on its outer periphery, a male threaded portion as well as an annular jaw portion and an annular flange portion each forming a horizontally projecting portion, the male treaded portion, the jaw portion and the flange portion being formed downward from above in this order, 
         [0032]    wherein the cap comprises a cap main body, a cap ring, and at least one bridge connecting the cap main body and the cap ring to each other, 
         [0033]    wherein the cap main body is configured to include a female threaded portion formed on an inner periphery of the cap main body to be screwed onto the male threaded portion such that the female threaded portion is screwed onto the male threaded portion to allow the cap to close the neck portion, 
         [0034]    wherein the cap ring is in a ring shape, an upper end of the cap ring is connected to a lower end of the cap main body via the at least one bridge, the cap ring is formed to have a larger internal diameter than an external diameter of the jaw portion so that the cap ring is fitted on the jaw portion with a gap formed outside the jaw portion, and at least one stopper capable of engagement with a lower end of the jaw portion from below is formed inside the cap ring so as to project in a direction toward an axis such that when the cap is screwed onto the neck portion after filling the bottle main body with content, an upper end of the at least one stopper is engaged with a lower surface of the jaw portion after the at least one stopper passes around the jaw portion, 
         [0035]    wherein a high-height cylindrical portion connecting the jaw portion and the flange portion to each other is provided between the jaw portion and the flange portion, 
         [0036]    wherein the high-height cylindrical portion has a height (H) of at least 8 mm, 
         [0037]    wherein the high-height cylindrical portion has a taper angle of up to 90°, and 
         [0038]    wherein when the cap main body is rotated in a direction in which the female threaded portion is unscrewed from the male threaded portion, thus discharging the content from the bottle main body, the at least one bridge is broken by shear force to separate the cap ring from the cap main body, and as a result the cap ring drops down due to its own weight in a state in which the axis extends in a vertical direction so that its lower surface comes into contact with the flange portion, the cap ring remains on the flange portion and a lateral surface of the high-height cylindrical portion is exposed between an upper surface of the cap ring and the lower surface of the jaw portion, which makes it possible to determine that the cap is already opened. 
         [0000]    (5) The bottle-shaped resin container according to (4), wherein the bottle-shaped resin container 
         [0039]    has a marking which is formed on surfaces of the cap main body and the cap ring so as to lie on both the cap main body and the cap ring in a state in which the cap is not opened, and the cap main body and the cap ring are connected to each other via the at least one bridge, and 
         [0040]    is configured such that the at least one bridge is broken by cap opening to cause the cap ring to be separated from the cap main body and drop down to come into contact with the flange portion, which makes it possible to determine that the cap is already opened because in a case where the cap is closed again, the marking is not restored to a same state as before the cap opening. 
       Advantageous Effects of Invention 
       [0041]    The present invention can provide a bottle-shaped resin container capable of easily determining whether the container is not opened, and moreover having a cap ring which can be easily removed. 
         [0042]    Since it is easy to determine that the bottle-shaped resin container of the invention as described above is not opened, quality can be easily retained in stores and other places, and for example, poisoning cases can be prevented from occurring. Restaurants which provide products, for example, can make an appeal in that the provided products are new, thus increasing users&#39; confidence, and users can consume new products safely. Furthermore, efforts made by manufactures toward safety are appreciated and provision of used products or products in refilled containers in restaurants and stores are suppressed, which will lead to an increase in sales volume of products. 
         [0043]    Furthermore, since the cap ring of the bottle-shaped resin container according to the invention has a wide range of movement, the cap ring is easily cut out using a tool such as a nipper at the time of sorting. This holds promise for promoting recycling activities. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0044]      FIG. 1  is a schematic front view (partial cross-sectional view) showing a part of a preferred embodiment of a bottle-shaped resin container according to the invention. 
           [0045]      FIG. 2  are schematic front views (partial cross-sectional views) for illustrating screwing of a cap onto a bottle main body. 
           [0046]      FIG. 3  is a schematic front view (partial cross-sectional view) for illustrating movement of a cap ring. 
           [0047]      FIG. 4  is a schematic front view for illustrating cutting of the cap ring with a nipper. 
           [0048]      FIG. 5  is a schematic view only showing a jaw portion, a high-height cylindrical portion and a flange portion in the bottle-shaped resin container of the invention shown in  FIG. 1 . 
           [0049]      FIG. 6  is a schematic enlarged view (cross-sectional view) for illustrating an embodiment of a lateral surface of the high-height cylindrical portion. 
           [0050]      FIG. 7  is a schematic enlarged view (cross-sectional view) for illustrating another embodiment of the lateral surface of the high-height cylindrical portion. 
           [0051]      FIG. 8  is a schematic enlarged view (cross-sectional view) for illustrating still another embodiment of the lateral surface of the high-height cylindrical portion. 
           [0052]      FIG. 9  is a schematic enlarged view (cross-sectional view) for illustrating yet another embodiment of the lateral surface of the high-height cylindrical portion. 
           [0053]      FIG. 10  is a schematic enlarged view (cross-sectional view) for illustrating still yet another embodiment of the lateral surface of the high-height cylindrical portion. 
           [0054]      FIG. 11  is a schematic enlarged view (cross-sectional view) for illustrating yet still another embodiment of the lateral surface of the high-height cylindrical portion. 
           [0055]      FIG. 12  are schematic views showing the top surface and the cross-sectional surface of a cap ring having a typical shape. 
           [0056]      FIG. 13  are schematic views showing the top surface and the cross-sectional surface of another cap ring having a typical shape. 
           [0057]      FIG. 14  are schematic views showing the top surface and the cross-sectional surface of still another cap ring having a typical shape. 
           [0058]      FIG. 15  are schematic views showing the top surface and the cross-sectional surface of yet another cap ring having a typical shape. 
           [0059]      FIG. 16  is a schematic enlarged view (cross-sectional view) of the periphery of a cap ring and a stopper. 
           [0060]      FIG. 17  is a schematic enlarged view (cross-sectional view) of the periphery of another cap ring and another stopper. 
           [0061]      FIG. 18  is a schematic enlarged view (cross-sectional view) of the periphery of still another cap ring and still another stopper. 
           [0062]      FIG. 19  is a schematic enlarged view (cross-sectional view) of the periphery of yet another cap ring and yet another stopper. 
           [0063]      FIG. 20  are schematic views for illustrating the positional relation between a cap ring and bridges. 
           [0064]      FIG. 21  are schematic front views for illustrating marking. 
           [0065]      FIG. 22  are schematic front views for illustrating another marking. 
           [0066]      FIG. 23  are schematic front views for illustrating still another marking. 
           [0067]      FIG. 24  is a schematic partial front view (partial cross-sectional view) for illustrating a conventional bottle-shaped resin container. 
           [0068]      FIG. 25  is another schematic partial front view for illustrating the conventional bottle-shaped resin container. 
       
    
    
     DESCRIPTION OF EMBODIMENTS 
       [0069]    The present invention will be described with reference to  FIGS. 1 to 23 . 
         [0070]      FIG. 1  is a schematic front view (partial cross-sectional view) showing a part of a preferred embodiment of a bottle-shaped resin container according to the invention. The lower part of the bottle-shaped resin container of the invention is not shown in  FIG. 1 . 
         [0071]    In  FIG. 1 , the bottle-shaped resin container  1  has a bottle main body  3  and a cap  5 . 
         [0072]    The bottle main body  3  will be described. 
         [0073]    The bottle main body  3  includes a neck portion  30  and a body portion  40 , which are integrally formed. 
         [0074]    The neck portion  30  has on its outer periphery a male threaded portion  32 , an annular jaw portion  34  forming a horizontally projecting portion and an annular flange portion  36  also forming a horizontally projecting portion. The male threaded portion  32 , the jaw portion  34  and the flange portion  36  are disposed downward from above in this order. 
         [0075]    The body portion  40  of this embodiment is similar to that in a conventionally known container holding content such as drinking water filled thereinto. 
         [0076]    The shapes and the materials of the neck portion  30  and the body portion  40  which constitute the bottle main body  3  are not particularly limited and may be the same as those in, for example, conventionally known containers. 
         [0077]    The cap  5  will be described. 
         [0078]    The cap  5  includes a cap main body  52 , a cap ring  54 , and bridges  56  connecting the cap main body  52  and the cap ring  54  to each other. 
         [0079]    The cap main body  52  has a female threaded portion  58  formed on its inner periphery, the female threaded portion  58  screwed onto the male threaded portion  32 . Screwing of the female threaded portion  58  onto the male threaded portion  32  allows the neck portion  30  to be closed by the cap  5 . 
         [0080]    The cap ring  54  is in a ring shape and its upper end is connected to the lower end of the cap main body  52  via the bridges  56  which are large in number. The cap ring  54  is formed so as to have a slightly larger internal diameter than the external diameter of the jaw portion  34  so that the cap ring  54  is fitted on the outside of the jaw portion  34  with a slight gap formed outside the jaw portion  34 . Inside the cap ring  54 , at least one stopper  60  which is capable of engagement with the lower end of the jaw portion  34  from below is formed so as to project in a direction toward the axis. When the cap  5  is screwed onto the neck portion  30  of the bottle main body  3  after the bottle main body  3  is filled with content  62  such as drinking water as shown in  FIG. 2( a ) , the stopper  60  is configured so that its upper end is engaged with a lower surface of the jaw portion  34  as shown in  FIG. 2( b )  after the stopper  60  passes around the jaw portion  34 . 
         [0081]    The bottle-shaped resin container of the invention has the above-described configuration and further has a high-height cylindrical portion  70  formed between the jaw portion  34  and the flange portion  36  to connect the jaw portion  34  and the flange portion  36  to each other unlike conventional bottle-shaped resin containers. 
         [0082]    When the cap main body  52  is rotated, as shown in  FIG. 3 , in a direction in which the female threaded portion  58  is unscrewed from the male threaded portion  32 , thus discharging content  62  such as drinking water from the bottle main body  3  in the bottle-shaped resin container of the invention as described above, the bridges  56  are broken by shear force to separate the cap ring  54  from the cap main body  52 . As a result, by putting the bottle-shaped resin container of the invention on a desk or other places so that the axis extends in an approximately vertical direction, the cap ring  54  drops down due to its own weight and its lower surface comes into contact with the flange portion  36  and remains on the flange portion  36 . In this state, the lateral surface of the high-height cylindrical portion  70  is exposed between an upper surface of the cap ring  54  and the lower surface of the jaw portion  34  as shown in  FIG. 3 , which makes it possible to easily determine that the container is already opened. 
         [0083]    Furthermore, since the cap ring  54  of the bottle-shaped resin container of the invention has a wide range of movement as shown in  FIG. 4 , the cap ring  54  is easily cut out using a tool such as a nipper at the time of sorting. This holds promise for promoting recycling activities. 
         [0084]    The high-height cylindrical portion  70  will be described in detail. 
         [0085]    As shown in  FIG. 1 , the high-height cylindrical portion  70  exists between the jaw portion  34  and the flange portion  36  to connect the jaw portion  34  and the flange portion  36  to each other. 
         [0086]    The high-height cylindrical portion  70  as described above preferably has a height (H) of at least 8 mm and more preferably at least 10 mm. The height (H) is also preferably up to 20 mm and more preferably up to 15 mm. 
         [0087]    It is preferable for the height (H) of the high-height cylindrical portion  70  to fall within the above-defined range because it is possible to determine more easily that the container is already opened and in addition the cap ring  54  is cut out more easily using a tool such as a nipper at the time of sorting. 
         [0088]    As shown in  FIGS. 1 and 5 , the height (H) of the high-height cylindrical portion  70  refers to a length from the lower surface of the jaw portion  34  to an upper surface  37  of the flange portion  36  in the bottle-shaped resin container of the invention disposed so that its axis extends in a vertical direction.  FIG. 5  is a schematic view only showing the jaw portion  34 , the high-height cylindrical portion  70  and the flange portion  36  in the bottle-shaped resin container of the invention shown in  FIG. 1 . 
         [0089]    The difference (H−h) between the height (H) of the high-height cylindrical portion  70  and the height (h) of the cap ring  54  is preferably at least 3 mm. H−h is preferably at least 4 mm and preferably at least 5 mm. H−h is preferably up to 20 mm, more preferably up to 15 mm, even more preferably up to 10 mm, yet even more preferably up to 8 mm, and still even more preferably up to 6 mm. H−h is preferably from 5 to 6 mm. 
         [0090]    It is preferable for the difference (H−h) between the height (H) of the high-height cylindrical portion  70  and the height (h) of the cap ring  54  to fall within the above-defined range because it is possible to determine more easily that the container is already opened and in addition the cap ring  54  is cut out more easily using a tool such as a nipper at the time of sorting. 
         [0091]    The height (h) of the cap ring  54  and the height (H) of the high-height cylindrical portion  70  preferably satisfy the relation of H≧1.5×h and more preferably H≧1.8×h. The height (h) of the cap ring  54  and the height (H) of the high-height cylindrical portion  70  also preferably satisfy the relation of H≦4.0×h, more preferably H≦3.0×h, even more preferably H≦2.5×h, and still even more preferably H≦2.2×h. The height of the high-height cylindrical portion is preferably about twice the height of the cap ring as expressed by H=2×h. 
         [0092]    It is preferable for the height (h) of the cap ring  54  and the height (H) of the high-height cylindrical portion  70  to satisfy the foregoing relations because it is possible to determine more easily that the container is already opened and in addition the cap ring  54  is cut out more easily using a tool such as a nipper at the time of sorting. 
         [0093]    The height (h) of the cap ring  54  refers to a vertical length from the upper surface to the lower surface of the cap ring  54  in the bottle-shaped resin container of the invention disposed so that its axis extends in the vertical direction, as shown in  FIG. 1 . 
         [0094]    The high-height cylindrical portion  70  has a taper angle of up to 90° and preferably a taper angle of 30° or more but less than 90°. 
         [0095]    The taper angle is more preferably at least 45°, even more preferably at least 60°, yet even more preferably at least 65°, and still even more preferably at least 81°. The taper angle is also more preferably up to 85°, even more preferably up to 80°, and yet even more preferably up to 75°. The taper angle is preferably about 70°. 
         [0096]    It is preferable for the high-height cylindrical portion  70  to have a taper angle within the above-defined range because when the cap main body  52  is rotated in a direction in which the female threaded portion  58  is unscrewed from the male threaded portion  32 , thus breaking the bridges  56  to separate the cap ring  54  from the cap main body  52 , the cap ring  54  moves smoothly onto the flange portion  36  due to its own weight so that its lower surface comes into contact with the flange portion  36 , and hence it is possible to determine more easily that the container is already opened and in addition the cap ring  54  is cut out more easily using a tool such as a nipper at the time of sorting. 
         [0097]    The taper angle of the high-height cylindrical portion  70  will be described with reference to  FIG. 5 . 
         [0098]    As described above,  FIG. 5  is a schematic view only showing the jaw portion  34 , the high-height cylindrical portion  70  and the flange portion  36  in the bottle-shaped resin container of the invention shown in  FIG. 1 . 
         [0099]    The taper angle of the high-height cylindrical portion  70  means an angle indicated by θ in  FIG. 5 . More specifically, the taper angle means an angle formed between a lateral surface  72  of the high-height cylindrical portion  70  and the upper surface  37  of the flange portion  36  when seen from the front of the bottle-shaped resin container of the invention disposed so that its axis extends in the vertical direction. 
         [0100]    If the taper angle cannot be determined unambiguously as in a case where the high-height cylindrical portion  70  has more than one lateral surface  72  or in a case where the lateral surface  72  is a curved surface, the taper angle means a maximum value of the angle formed between the lateral surface  72  of the high-height cylindrical portion  70  and the upper surface  37  of the flange portion  36 . 
         [0101]    The shape of the lateral surface  72  of the high-height cylindrical portion  70  will be described with reference to  FIGS. 6 to 11 .  FIGS. 6 to 11  are each a partially enlarged schematic view (cross-sectional view) of the cap ring  54 , the stopper  60 , the jaw portion  34 , the high-height cylindrical portion  70  and the flange portion  36 . The cap ring  54  usually has burrs  76  formed on its upper side. 
         [0102]    The embodiment shown in  FIG. 6  is the same as the embodiment shown in  FIGS. 1 and 5  in that the lateral surface of the high-height cylindrical portion  70  has a linear profile when seen from the front but the taper angle (i.e., the angle (θ) formed between the lateral surface and the upper surface  37  of the flange portion  36 ) is different. To be more specific, the taper angle in the embodiment shown in  FIGS. 1 and 5  is less than 90° but the taper angle in the embodiment shown in  FIG. 6  is 90°. 
         [0103]    The high-height cylindrical portion in the bottle-shaped resin container according to the invention is preferably of the embodiment shown in  FIG. 6  because it is easy to manufacture the cylindrical portion owing to its simple shape. The stopper  60  is preferably located at a position where the stopper  60  does not easily come into contact with the lateral surface  72  of the high-height cylindrical portion  70  because the cap ring  54  drops down easily due to its own weight. 
         [0104]    The embodiments shown in  FIGS. 7 and 8  are embodiments in each of which the lateral surface  72  of the high-height cylindrical portion  70  has a profile of straight lines (two straight lines in the embodiment shown in  FIG. 7  and three straight lines in the embodiment shown in  FIG. 8 ) when seen from the front and the central portion in its height direction is inwardly concave. 
         [0105]    The high-height cylindrical portion in the bottle-shaped resin container according to the invention is preferably of the embodiment shown in  FIG. 7  or  FIG. 8  because the high-height cylindrical portion has a higher strength. 
         [0106]    In this case, the taper angle means angles indicated by θ in  FIGS. 7 and 8 . 
         [0107]    The embodiment shown in  FIG. 9  is an embodiment in which the lateral surface  72  of the high-height cylindrical portion  70  has a curved profile when seen from the front. 
         [0108]    The high-height cylindrical portion in the bottle-shaped resin container according to the invention is preferably of the embodiment shown in  FIG. 9  because the high-height cylindrical portion has a higher strength. 
         [0109]    In this case, the taper angle means an angle indicated by θ in  FIG. 9 . 
         [0110]    The embodiment shown in  FIG. 10  is an embodiment in which the lateral surface  72  of the high-height cylindrical portion  70  has a profile composed of a combination of a curved portion and a linear portion when seen from the front. 
         [0111]    The high-height cylindrical portion in the bottle-shaped resin container according to the invention is preferably of the embodiment shown in  FIG. 10  because the high-height cylindrical portion has a higher strength. 
         [0112]    In this case, the taper angle means an angle indicated by θ in  FIG. 10 . 
         [0113]    The embodiment shown in  FIG. 11  is an embodiment in which the lateral surface  72  of the high-height cylindrical portion  70  has a profile of curved lines (two curved lines in  FIG. 11 ) when seen from the front and the central portion in its height direction is inwardly concave. 
         [0114]    In a case where the high-height cylindrical portion in the bottle-shaped resin container of the invention is of the embodiment shown in  FIG. 11 , the stopper  60  is preferably located at a position where the stopper  60  does not easily come into contact with the lateral surface  72  of the high-height cylindrical portion  70  because the cap ring  54  drops down easily due to its own weight. 
         [0115]    In this case, the taper angle means an angle indicated by θ in  FIG. 11 . 
         [0116]    The internal diameter (r) formed by the stopper  60  in the cap ring  54  and the maximum value (R max ) of the external diameter (R) of the high-height cylindrical portion  70  preferably satisfy the relation of 0.8×r≧R max , more preferably 0.9×r≧R max , even more preferably 0.95×r≧R max , and still even more preferably 0.98×r≧R max . The internal diameter (r) formed by the stopper  60  in the cap ring  54  and the maximum value (R max ) of the external diameter (R) of the high-height cylindrical portion  70  also preferably satisfy the relation of 0.995×r≦R max , and more preferably 0.99×r≦R max . 
         [0117]    The internal diameter (r) formed by the stopper  60  in the cap ring  54  and the maximum value (R max ) of the external diameter (R) of the high-height cylindrical portion  70  preferably satisfy the relation of 0.8×r≦R max , more preferably 0.9×r≦R max , even more preferably 0.95×r≦R max , and still even more preferably 0.98×r≦R max . The internal diameter (r) formed by the stopper  60  in the cap ring  54  and the maximum value (R max ) of the external diameter (R) of the high-height cylindrical portion  70  also preferably satisfy the relation of 0.995×r≧R max , and more preferably 0.99×r≧R max . 
         [0118]    It is preferable for the internal diameter (r) formed by the stopper  60  in the cap ring  54  and the maximum value (R max ) of the external diameter (R) of the high-height cylindrical portion  70  to satisfy such relations because when the cap main body  52  is rotated in a direction in which the female threaded portion  58  is unscrewed from the male threaded portion  32 , thus breaking the bridges  56  to separate the cap ring  54  from the cap main body  52 , the cap ring  54  moves smoothly onto the flange portion  36  due to its own weight so that its lower surface comes into contact with the flange portion  36 , and hence it is possible to determine more easily that the container is already opened and in addition the cap ring  54  is cut out more easily using a tool such as a nipper at the time of sorting. 
         [0119]    The maximum value (R max ) of the external diameter (R) of the high-height cylindrical portion  70  will be described with reference to  FIG. 5 . 
         [0120]    As shown in  FIG. 5 , the external diameter (R) of the high-height cylindrical portion  70  refers to a horizontal length of the high-height cylindrical portion  70  when seen from the front of the bottle-shaped resin container of the invention disposed so that its axis extends in the vertical direction and its maximum value is denoted by R max . 
         [0121]    The internal diameter (r) formed by the stopper  60  in the cap ring  54  will be described with reference to  FIGS. 12 to 15 .  FIGS. 12 to 15  are schematic views each showing the top surface or the cross-sectional surface of a cap ring having a typical shape. In each of these drawings, (a) is a top view and (b) is a cross-sectional view taken along line A-A in (a). 
         [0122]      FIG. 12  show an embodiment in which one stopper  60  which is capable of engagement with the lower end of the jaw portion  34  from below is formed inside the ring-shaped cap ring  54  along the inner periphery of the cap ring  54 . The stopper  60  is formed to project in a direction toward the axis. 
         [0123]    In such an embodiment, the internal diameter (r) formed by the stopper  60  in the cap ring  54  means a length shown in  FIG. 12( a ) . 
         [0124]      FIG. 13  show an embodiment in which a plurality of stoppers  60  which are capable of engagement with the lower end of the jaw portion  34  from below are formed inside the ring-shaped cap ring  54  in a circumferential direction at a predetermined pitch so as to project in a direction toward the axis. 
         [0125]    In such an embodiment, the internal diameter (r) formed by the stoppers  60  in the cap ring  54  means a diameter of an inscribed circle  74  (circle indicated by a dotted line in  FIG. 13( a ) ) drawn so as to contact all the stoppers  60  in  FIG. 13( a ) . 
         [0126]    The embodiments shown in  FIGS. 14 and 15  are different from the embodiments shown in  FIGS. 12 and 13  but as in the embodiment shown in  FIG. 13 , the internal diameter (r) formed by stoppers  60  in the cap ring  54  means a diameter of an inscribed circle  74  drawn so as to contact all the stoppers  60  in each of  FIGS. 14( a ) and 15( a ) . 
         [0127]    Next, the positional relation between the cap ring  54  and the jaw portion  54  and the positional relation between the stopper  60  and the high-height cylindrical portion  70  will be described with reference to  FIGS. 16 to 19 . 
         [0128]      FIG. 16  is an enlarged schematic view (cross-sectional view) showing the vicinity of the cap ring  54  and the stopper  60  in  FIG. 1 . 
         [0129]    As described above, the cap ring  54  is formed so as to have a slightly larger internal diameter than the external diameter of the jaw portion  34  so that the cap ring  54  is fitted on the outside of the jaw portion  34  with a slight gap formed outside the jaw portion  34 . 
         [0130]    To be more specific, the horizontal distance (X) between the inner end of the cap ring  54  (end closest to the axis) and the outer end of the jaw portion  34  (end farthest from the axis) as shown in  FIG. 16  is preferably at least 0.2 mm and more preferably at least 0.25 mm. The distance (X) is also preferably up to 3 mm, more preferably up to 1 mm, and even more preferably up to 0.5 mm. 
         [0131]    When the cap main body  52  is rotated in a direction in which the female threaded portion  58  is unscrewed from the male threaded portion  32 , thereby breaking the bridges  56  to discharge content  62  such as drinking water from the bottle main body  3 , burrs  76  usually remain at the upper end portion of the cap ring  54  as shown in  FIG. 16 . The distance (X) is preferably within the above-defined range because when the cap ring  54  separated from the cap main body  52  moves onto the flange portion  36  due to its own weight, the burrs  76  are not easily caught on the jaw portion  34  and hence the cap ring  54  moves smoothly. 
         [0132]    The horizontal distance (Y) between the inner end of the stopper  60  (end closest to the axis) and the outer end of the high-height cylindrical portion  70  (end farthest from the axis) as shown in  FIG. 16  is preferably at least 0.2 mm and more preferably at least 0.25 mm. The distance (Y) is also preferably up to 3 mm, more preferably up to 1 mm, and even more preferably up to 0.5 mm. 
         [0133]    The distance (Y) is preferably within the above-defined range because when the cap ring  54  separated from the cap main body  52  moves onto the flange portion  36  due to its own weight, the stopper  60  is not easily caught on the lateral surface of the high-height cylindrical portion  70  and hence the cap ring  54  moves smoothly. 
         [0134]    The embodiment shown in  FIG. 17  is different from the embodiment shown in  FIG. 16  in that the high-height cylindrical portion  70  has a taper angle of 30° or more but less than 90°. 
         [0135]    Such a case is preferable because even if the distance (Y) shown in  FIG. 16  is substantially zero as shown in  FIG. 17 , when the cap ring  54  separated from the cap main body  52  moves onto the flange portion  36  due to its own weight, the stopper  60  is not easily caught on the lateral surface of the high-height cylindrical portion  70  and hence the cap ring  54  moves smoothly. 
         [0136]    The embodiment shown in  FIG. 18  is different from the embodiment shown in  FIG. 17  in the shape of the stopper  60 . 
         [0137]    Even such a case is preferable as long as the high-height cylindrical portion  70  has a taper angle of 30° or more but less than 90° as in the embodiment shown in  FIG. 17  because even if the distance (Y) shown in  FIG. 16  is substantially zero as shown in  FIG. 18 , when the cap ring  54  separated from the cap main body  52  moves onto the flange portion  36  due to its own weight, the stopper  60  is not easily caught on the lateral surface of the high-height cylindrical portion  70  and hence the cap ring  54  moves smoothly. 
         [0138]    The embodiment shown in  FIG. 19  is different from the embodiment shown in  FIG. 16  in the shape of the lower surface of the jaw portion  34 . Such a shape is preferable because even if the high-height cylindrical portion  70  has no taper angle (the taper angle is 90°) and the distance (Y) shown in  FIG. 16  is substantially zero as shown in  FIG. 19 , when the cap ring  54  separated from the cap main body  52  moves onto the flange portion  36  due to its own weight, the stopper  60  is not easily caught on the lateral surface of the high-height cylindrical portion  70  and hence the cap ring  54  moves smoothly. 
         [0139]    Next, the positions of the bridges in the cap ring will be described with reference to  FIG. 20 . 
         [0140]      FIG. 20( a )  is a schematic front view of the cap  5  including the cap main body  52 , the cap ring  54  and the bridges  56  connecting the cap main body  52  and the cap ring  54  to each other.  FIGS. 20( b ) and 20( c )  are views (schematic views) of the cap ring  54  when seen from above.  FIG. 20( b )  is different from  FIG. 20( c )  in the positions of the bridges  56 . The bridges  56  in  FIG. 20( b )  are formed on the inner peripheral side in the thickness direction of the cap ring  54 , whereas the bridges  56  in  FIG. 20( c )  are formed on the outer peripheral side in the thickness direction of the cap ring  54 . 
         [0141]    In the bottle-shaped resin container of the invention, the bridges  56  are preferably formed on the outer peripheral side in the thickness direction of the cap ring  54  as shown in  FIG. 20( c ) . The bridges  56  are preferably located at positions where burrs and the like are not easily caught on the lateral surface of the high-height cylindrical portion  70  when the cap ring  54  moves onto the flange portion  36  and are therefore preferably not located on the inner peripheral side in the thickness direction of the cap ring  54 . However, the bridges  56  may be located on the inner peripheral side if burrs and the like are not easily caught on the lateral surface of the high-height cylindrical portion  70  even in the presence of the bridges  56  on the inner peripheral side in the thickness direction of the cap ring  54  when the cap ring  54  moves onto the flange portion  36 , as in a case where the bridges  56  are small in size. 
         [0142]    As described above, when the cap main body is rotated in a direction in which the female threaded portion is unscrewed from the male threaded portion, thereby breaking the bridges to discharge content such as drinking water from the bottle main body, burrs usually remain at the upper end portion of the cap ring  54 . The bridges  56  are preferably formed on the outer peripheral side in the thickness direction of the cap ring  54  as shown in  FIG. 20( c )  because when the cap ring  54  separated from the cap main body moves onto the flange portion due to its own weight, the burrs are not easily caught on the jaw portion and hence the cap ring  54  moves smoothly. 
         [0143]    The bottle-shaped resin container  1  of the invention is preferably configured such that a marking  80  is formed on the surfaces of the cap main body  52  and the cap ring  54  so as to lie on both the cap main body  52  and the cap ring  54  in a state in which the cap  5  is not opened, and the cap main body  52  and the cap ring  54  are connected to each other via the bridges  56  as shown in  FIG. 21( a )  and the bridges  56  are broken by cap opening to cause the cap ring  54  separated from the cap main body  52  to move onto the flange portion  36  due to its own weight as shown in  FIG. 21( b ) , which makes it possible to determine that the cap is already opened because in a case where the cap  5  is closed again, the marking  80  is not restored to the same state as before the cap opening, as shown in  FIG. 21( c ) . 
         [0144]    The marking  80  may be composed of letters such as “QUALITY” as shown in  FIG. 21 , FIG. ( 80 ′) as shown in  FIG. 22 , or a combination of figures and letters ( 80 ″) as shown in  FIG. 23 . 
         [0145]    The markings ( 80 ,  80 ′,  80 ″) may be formed by any of marking methods including printing, coloring and embossing to make a relief. 
       DESCRIPTION OF SYMBOLS 
       [0000]    
       
         
           
               1  bottle-shaped resin container 
               3  bottle main body 
               5  cap 
               30  neck portion 
               32  male threaded portion 
               34  jaw portion 
               36  flange portion 
               37  upper surface of the flange portion 
               40  body portion 
               52  cap main body 
               54  cap ring 
               56  bridge 
               58  female threaded portion 
               60  stopper 
               62  content 
               70  high-height cylindrical portion 
               72  lateral surface of the high-height cylindrical portion 
               74  circle inscribed in stoppers 
               76  burr 
               80 ,  80 ′,  80 ″ markings 
               100  bottle-shaped resin container 
               102  bottle main body 
               104  cap 
               106  neck portion 
               108  body portion 
               110  male threaded portion 
               112  jaw portion 
               114  flange portion 
               116  cap main body 
               118  cap ring 
               120  bridge 
               122  female threaded portion 
               124  stopper