Patent Publication Number: US-9427761-B2

Title: Nozzle cap-equipped discharge container

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     This application is a 371 of PCT/JP2013/083622, filed on Dec. 16, 2013, and claims priority to the following Japanese Patent applications: 2012-275934, filed on Dec. 18, 2012; 2012-275933, filed on Dec. 18, 2012; and 2012-280885, filed on Dec. 25, 2012. 
     TECHNICAL FIELD 
     The present invention relates to a nozzle cap-equipped discharge container, and particularly, to a nozzle cap-equipped discharge container including a container body, that is to contain content liquid, and a nozzle cap that is mounted on a mouth neck section of the container body and includes a discharge nozzle portion. 
     BACKGROUND ART 
     As a nozzle cap-equipped discharge container including a container body, that is to contain content liquid, and a nozzle cap that includes a discharge nozzle portion, for example, a squeeze foamer container or a squeeze-type double release container is adapted to send content liquid to a discharge nozzle portion and to discharge the content liquid from a discharge opening, which is formed at the tip of the discharge nozzle, in the form of foam or spray by the pressurization of the inside of a container body when a user grasps and presses the container body. 
     In the nozzle cap-equipped discharge container that sends content liquid to the discharge nozzle portion and discharges the content liquid by the pressurization of the inside of the container body, for example, a valve mechanism, which opens and closes an outside air intake port through which the outside air is taken into the container body due to negative pressure generated in the container body when the pressing of the container body is released, and a porous member, which foams content liquid while mixing the content liquid with air, need to be mounted outside or inside a longitudinal direction flow passage that is disposed inside the mouth neck section of the container body. For this reason, the structure of a nozzle cap and a step of assembling the nozzle cap become complicated and the height of the nozzle cap protruding from the mouth neck section of the container body is increased (for example, see Patent Literatures 1 and 2). 
     Further, in the nozzle cap-equipped discharge container that sends content liquid to the discharge nozzle portion and discharges the content liquid by the pressurization of the inside of the container body, for example, the outside air is taken into the container body through the outside air intake port due to negative pressure generated in the container body when the pressing of the container body is released. Accordingly, the container body, which has been deformed and reduced in volume, can return to an original shape. Furthermore, the outside air intake port through which the outside air is taken into the container body is adapted to be opened and closed by a valve mechanism to prevent the air, which is present in the container body, from flowing out of the container body through the outside air intake port, for example, when the container body is pressed (for example, see Patent Literatures 1 and 2). 
     For example, a squeeze foamer container is known as a foam discharge container that foams content liquid while mixing the content liquid with air and discharges the content liquid from a discharge nozzle portion in the form of foam (for example, see Patent Literatures 1 and 2). A container body of the squeeze foamer container is deformed and reduced in volume by an operation for grasping and squeezing (an operation for pressing) a bottle-shaped container body having flexibility. In this case, the squeeze foamer container sends air and the content liquid, which are contained in the container body, to a longitudinal discharge flow passage of a nozzle cap including a discharge nozzle portion, foams the air and the content liquid by making the air and the content liquid pass through a porous member that uses mesh or the like and is mounted in the longitudinal discharge flow passage, and discharges the air and the content liquid from the discharge nozzle portion in the form of foam. 
     Further, in the squeeze foamer container, a gas-liquid mixing chamber, which mixes the content liquid with air, is provided below a portion of the longitudinal discharge flow passage on which the porous member is mounted; the content liquid, which is fed from the container body through a liquid flow passage, is mixed with air, which is fed from the container body through an air flow passage, in the gas-liquid mixing chamber; and the mixture of the content liquid and the air is foamed by passing through the porous member. 
     CITATION LIST 
     Patent Literature 
     [Patent Literature 1] JP 2934145 B1 
     [Patent Literature 2] JP 2004-531430 W 
     [Patent Literature 3] JP 2012-1242 A 
     SUMMARY OF INVENTION 
     The invention provides a nozzle cap-equipped discharge container including: a container body that is to contain content liquid; and a nozzle cap that is mounted on a mouth neck section of the container body and includes a discharge section discharging the content liquid fed by the pressurization of the inside of the container body. The nozzle cap includes a longitudinal discharge flow passage that sends upward the content liquid fed from the container body, and a tip-side discharge flow passage that allows the longitudinal discharge flow passage and the discharge section to communicate with each other. The nozzle cap includes a body part and a lid part, and the body part includes the longitudinal discharge flow passage therein. The lid part forms the upper part of a region including a portion directly above the longitudinal discharge flow passage, and the tip-side discharge flow passage includes a flow passage that is formed by the body part and the lid part. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a perspective view of a nozzle cap-equipped discharge container according to a preferred embodiment of the invention. 
         FIG. 2  is a perspective view of a nozzle cap, illustrating a state that a lid part and a body part are opened. 
         FIG. 3  is a cross-sectional view of main parts of the nozzle cap-equipped discharge container according to the preferred embodiment of the invention. 
         FIG. 4  is an enlarged cross-sectional view of a portion A of  FIG. 3 , illustrating the structure of an intake valve mechanism. 
         FIG. 5  is an enlarged cross-sectional view illustrating a situation in which content liquid is foamed while being mixed with air by porous members mounted in a longitudinal discharge flow passage. 
         FIG. 6  is a cross-sectional view of main parts of a nozzle cap-equipped discharge container according to another embodiment. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     A container in which a valve mechanism for opening and closing an outside air intake port through which the outside air is taken into a container body is provided in the rear of a discharge nozzle portion of a nozzle cap within the range of the height of the discharge nozzle portion to simplify the structure of the nozzle cap and a step of assembling the nozzle cap and to reduce the height of the nozzle cap protruding from a mouth neck section of a container body has been developed (for example, see Patent Literature 3). However, there is a desire for the development of a new nozzle cap-equipped discharge container in which the structure of a nozzle cap and a step of assembling the nozzle cap can be further simplified and the height of the nozzle cap protruding from a mouth neck section of a container body can be reduced. 
     Further, since the valve mechanism for opening and closing the outside air intake port in the related art uses, for example, a valve member that is separately formed as a separate part made of a material different from a resin material of a main component of the nozzle cap, a structure and an assembling step for providing the valve mechanism in the nozzle cap are complicated. 
     Meanwhile, for example, a valve mechanism, which is provided with an outside air intake port and a thin plate-like valve portion, is considered as a valve mechanism having a simple structure that opens and closes the outside air intake port. The outside air intake port is formed so as to be opened at an outer peripheral surface of a nozzle cap. The thin plate-like valve portion is rotatably provided, and comes into close contact with an inner surface of an outer peripheral portion of the outside air intake port, which serves as a valve seat portion, so as to cover the formed outside air intake port from the inside of the nozzle cap. 
     However, in the valve mechanism having the simple structure in which the rotatable thin plate-like valve portion comes into close contact with the inner surface of the outer peripheral portion of the outside air intake port, the valve portion is disposed inside an inner hollow portion of the nozzle cap having a considerable area. Accordingly, since the change of pressure in the container body is not instantly transmitted to the valve portion well, there is a concern that the responsiveness of the valve mechanism may deteriorate. For this reason, it is desired that usability can be improved by allowing the change of pressure in the container body to be instantly transmitted to the valve portion to further improve the responsiveness of the valve mechanism. 
     Moreover, since the length of the longitudinal discharge flow passage needs to be increased by the length of the gas-liquid mixing chamber when the gas-liquid mixing chamber is provided below a portion of the longitudinal discharge flow passage on which the porous member is mounted, it is difficult to reduce the height of the nozzle cap and to form a compact nozzle cap. For this reason, there is a desire for the development of a new technology that can foam content liquid while mixing the content liquid with air without the deterioration of the quality of foam even when the gas-liquid mixing chamber is not particularly formed or the gas-liquid mixing chamber is formed so as to have a small height. 
     The invention relates to a nozzle cap-equipped discharge container of which the structure of a nozzle cap and a step of assembling the nozzle cap can be further simplified and which can be formed to be compact through the further reduction of the height of the nozzle cap protruding from a mouth neck section of a container body. 
     Further, the invention relates to a nozzle cap-equipped discharge container of which a valve mechanism for opening and closing an outside air intake port can be easily formed by a simple structure and a simple assembling step. 
     Furthermore, the invention relates to a nozzle cap-equipped discharge container in which the change of pressure in a container body is allowed to be instantly transmitted to a valve portion to further improve the responsiveness of the valve mechanism including the valve portion so that usability can be improved. 
     Moreover, the invention relates to a nozzle cap-equipped discharge container that can foam content liquid while mixing the content liquid with air without the deterioration of the quality of foam even though a gas-liquid mixing chamber is not particularly formed on the longitudinal discharge flow passage or a gas-liquid mixing chamber is formed so as to have a small height. 
     The invention provides a nozzle cap-equipped discharge container including: a container body that is to contain content liquid; and a nozzle cap that is mounted on a mouth neck section of the container body and includes a discharge section discharging the content liquid fed by the pressurization of the inside of the container body. The nozzle cap includes a longitudinal discharge flow passage that sends upward the content liquid fed from the container body, and a tip-side discharge flow passage that allows the longitudinal discharge flow passage and the discharge section to communicate with each other. The nozzle cap includes a body part and a lid part, and the body part includes the longitudinal discharge flow passage therein. The lid part forms the upper part of a region including a portion directly above the longitudinal discharge flow passage, and the tip-side discharge flow passage includes a flow passage that is formed by the body part and the lid part. 
     A nozzle cap-equipped discharge container  10  according to a preferred embodiment of the invention illustrated in  FIG. 1  is preferably a squeeze foamer container that discharges content liquid from a discharge nozzle portion  13 , which is a discharge section, in the form of foam when a user grasps and presses a container body  11  with hands. A nozzle cap  12 , which is mounted on a mouth neck section  11   a  (see  FIG. 3 ) of the container body  11 , has a function as a squeeze foamer that, with an operation for pressing the container body  11 , foams the content liquid while mixing the content liquid with air and discharges the content liquid from the discharge nozzle portion  13  in the form of foam. In the nozzle cap-equipped discharge container  10  of this embodiment, porous members  22 , which are to foam the content liquid while mixing the content liquid with air, can be mounted in a longitudinal discharge flow passage  16  from above the discharge nozzle portion  13  that is the discharge section. Accordingly, the structure of the nozzle cap  12  and a step of assembling the nozzle cap  12  are simplified, and the container  10  can be formed to be compact. 
     Further, the nozzle cap-equipped discharge container  10  of this embodiment is adapted so that an outside air intake port  14  through which the outside air is taken into the container body  11  when the pressing of the container body  11  is released can be opened and closed by an intake valve mechanism  15  having a simple structure and easily assembled. 
     Furthermore, in the nozzle cap-equipped discharge container  10  of this embodiment, the intake valve mechanism  15  (see  FIG. 3 ), which opens and closes the outside air intake port  14  through which the outside air is taken into the container body due to negative pressure generated in the container body  11  when the pressing of the container body  11  is released, has a simple structure including a cylindrical valve seat portion  15   a  and a valve portion  15   b , and the change of pressure in the container body  11  is instantly transmitted to the valve portion  15   b . Accordingly, the responsiveness of the intake valve mechanism  15  is improved. 
     Moreover, in the nozzle cap-equipped discharge container  10  of this embodiment, a gas-liquid mixing chamber does not need to be provided on the longitudinal discharge flow passage  16  (see  FIG. 3 ) of the nozzle cap  12 . Accordingly, the nozzle cap  12  can be formed to be compact and is adapted to be capable of mixing the content liquid with air and foaming the content liquid without the deterioration of the quality of foam. 
     Further, the nozzle cap-equipped discharge container  10  of this embodiment is a squeeze foamer container  10  including: a container body  11  that is to contain content liquid; and a nozzle cap  12  that is mounted on the mouth neck section  11   a  of the container body  11  and includes a discharge nozzle portion  13  discharging the content liquid fed by the pressurization of the inside of the container body  11 . As illustrated in  FIGS. 2 and 3 , the nozzle cap  12  includes a longitudinal discharge flow passage  16  that sends upward the content liquid fed from the container body  11 , and a tip-side discharge flow passage  17  that includes a tip discharge port  13   a  that allows the longitudinal discharge flow passage  16  and the discharge nozzle portion  13  to communicate with each other. The nozzle cap  12  includes a body part  12   a  and a lid part  12   b , and the body part  12   a  includes the longitudinal discharge flow passage  16  therein. The lid part  12   b  forms an upper part  20   a  of a region including a portion directly above the longitudinal discharge flow passage  16 , and the tip-side discharge flow passage  17  includes a flow passage that is formed by the body part  12   a  and the lid part  12   b.    
     In this embodiment, the discharge nozzle portion  13  is formed of a discharge nozzle portion that includes a lateral discharge flow passage as the tip-side discharge flow passage  17  and extends in a lateral direction. 
     In the nozzle cap-equipped discharge container (squeeze foamer container)  10  of this embodiment, the lid part  12   b  forms the upper part  20   a  of a portion including a whole of the discharge nozzle portion  13  that is the discharge section. 
     In the nozzle cap-equipped discharge container (squeeze foamer container)  10  of this embodiment, the lid part  12   b  is connected to the body part  12   a  by a hinge joint  12   c . After the lid part  12   b  is molded integrally with the body part  12   a  while being opened (see  FIG. 2 ), the lid part  12   b  is rotated about the hinge joint  12   c . As a result, the lid part  12   b  is integrally joined to the body part  12   a  (see  FIG. 1 ) in such a manner that the lid part closes an upper portion of a portion including a whole of the discharge nozzle portion  13 . 
     Meanwhile, in this specification, the integral joining is not specified in terms of a joining method and also includes, for example, integration using fitting between the body part and the lid part in addition to various joining methods such as heat sealing. Further, the integral joining also includes integration in which the body part and the lid part integrated with each other can be separated from each other again. 
     In the nozzle cap-equipped discharge container (squeeze foamer container)  10  of this embodiment, the porous members  22 , which are to foam the content liquid, are mounted inside the longitudinal discharge flow passage  16 , and the porous members  22  are mounted from above the longitudinal discharge flow passage  16  in a state that the lid part  12   b  and the body part  12   a  are not integrally joined to each other and the lid part  12   b  is opened (see  FIG. 2 ). 
     In the nozzle cap-equipped discharge container (squeeze foamer container)  10  of this embodiment, an upper end portion of the longitudinal discharge flow passage  16  is formed flush with a top surface plate  18   a  of a cap body portion  18  formed by the body part  12   a.    
     In the nozzle cap-equipped discharge container (squeeze foamer container)  10  of this embodiment, the lid part  12   b  is integrally provided with a pressing wall  32   b  that is disposed in an upper end opening of the longitudinal discharge flow passage  16  of the body part  12   a  and that is positioned directly above the outer peripheral edge portion of the porous member  22  mounted inside the longitudinal discharge flow passage  16 . In this embodiment, the pressing wall  32   b  serves as a butting wall (upper butting wall)  32   b  to be described below. 
     In the nozzle cap-equipped discharge container (squeeze foamer container)  10  of this embodiment, the discharge nozzle portion  13  is formed of a discharge nozzle portion that includes a lateral discharge flow passage as the tip-side discharge flow passage  17  as described above and the lid part  12   b  is integrally provided with a butting wall  32   b , which is disposed at an end portion located opposite to the tip discharge port  13   a  of the lateral discharge flow passage  17 , as an upper butting wall at a corner where the lateral discharge flow passage  17  and the longitudinal discharge flow passage  16  communicate with each other. In this embodiment, the butting wall  32   b  serves as the pressing wall  32   b  as described above. 
     In the nozzle cap-equipped discharge container  10  of this embodiment, the lower surface of the porous member  22  is disposed adjacent to a tip supply port  26   a  of a liquid flow passage  24   a  and tip supply ports  26   b  of air flow passages  24   b.    
     In the nozzle cap-equipped discharge container  10  of this embodiment, the plurality of porous members  22  are stacked and mounted inside the longitudinal discharge flow passage  16 , and, when seen in the lateral direction, a tip portion of the liquid flow passage  24   a  and a tip portion of the air flow passages  24   b  are formed so as to have a positional relationship where an extension line X from the tip supply port  26   a  in a content liquid supply direction and extension lines Y from the tip supply ports  26   b  in an air supply direction reach the lower surface of the lowermost porous member  22  before crossing each other. 
     Further, in this specification, a longitudinal direction means an up-and-down direction (corresponding to an up-and-down direction in  FIG. 1 ) when the nozzle cap-equipped discharge container  10  is erected as illustrated in  FIG. 1 . Furthermore, in this specification, an upper side means a side or a position that is higher than a reference position in the longitudinal direction. 
     Moreover, in this specification, the lateral direction, in which a positional relationship between the extension line X from the tip supply port  26   a  in the content liquid supply direction and the extension lines Y from the tip supply ports  26   b  in the air supply direction is seen, is a direction where a portion of the longitudinal discharge flow passage  16  in which the porous members  22  are mounted is seen perpendicular to the direction of the central axis of the longitudinal discharge flow passage  16  as illustrated in  FIG. 5 . 
     Further, the nozzle cap-equipped discharge container  10  of this embodiment is adapted so that the outside air intake port  14  can be opened and closed by the intake valve mechanism  15 . As illustrated in  FIGS. 2 and 3 , the outside air intake port  14  is opened at an outer peripheral surface of an outer region of the nozzle cap  12  around the longitudinal discharge flow passage  16  and the outside air is taken into the container body  11  through the outside air intake port  14  when negative pressure is generated in the container body  11 . The lid part  12   b  forms the upper part  20   a  of a portion including the region at which the outside air intake port  14  is opened. The intake valve mechanism  15  includes the cylindrical valve seat portion  15   a  that protrudes from an inner surface of the lid part  12   b  so as to surround the outside air intake port  14 , and the valve portion  15   b  that is preferably connected to the body part  12   a  in the form of a cantilever so as to be rotatable at a position corresponding to the cylindrical valve seat portion  15   a  and can come into close contact with the lower end face of the cylindrical valve seat portion  15   a.    
     In the nozzle cap-equipped discharge container (squeeze foamer container)  10  of this embodiment, the lid part  12   b  forms the upper part  20   a  of a portion that includes the discharge nozzle portion  13  and a region at which the outside air intake port  14  is opened. 
     In the nozzle cap-equipped discharge container (squeeze foamer container)  10  of this embodiment, the lid part  12   b  is connected to the body part  12   a  by the hinge joint  12   c . After the lid part  12   b  is molded integrally with the body part  12   a  while being opened (see  FIG. 2 ), the lid part  12   b  is rotated about the hinge joint  12   c . As a result, the lid part  12   b  is integrally joined to the body part  12   a  (see  FIG. 1 ) in such a manner that the lid part closes an upper portion of a portion including the discharge nozzle portion  13  and the region at which the outside air intake port  14  is opened. 
     In addition, in the nozzle cap-equipped discharge container  10  of this embodiment, as illustrated in  FIGS. 2 and 3 , an outside air intake chamber  19  is disposed above the top surface plate  18   a  of the cap body portion  18  of the nozzle cap  12 , and the outside air intake port  14 , which is opened at an upper surface portion of the outside air intake chamber  19  and through which the outside air is taken into the container body  11  when negative pressure is generated in the container body  11 , is provided so as to openable by the intake valve mechanism  15  provided inside the outside air intake chamber  19 . The intake valve mechanism  15  includes the valve seat portion (cylindrical valve seat portion)  15   a  that is provided on the inner surface of the outside air intake chamber  19  so as to surround the outside air intake port  14 , and the valve portion  15   b  that is preferably supported by a valve support portion (valve support piece)  28  so as to be rotatably provided at a position corresponding to the valve seat portion  15   a  and can come into close contact with the valve seat portion  15   a . The outside air intake chamber  19  includes an annular partition  34  that partitions a periphery of the intake valve mechanism  15 . An upper end portion of the annular partition  34  is joined to the upper surface portion of the outside air intake chamber  19  and a lower end portion of the annular partition  34  is joined to the top surface plate  18   a  of the cap body portion  18 . Accordingly, the annular partition  34  is provided so as to airtightly partition an outside air-intake flow passage which extends from the outside air intake port  14  to a top plate-outside air intake port  27 , which is opened at the top surface plate  18   a.    
     In this embodiment, the nozzle cap  12  has a two-part structure that includes the body part  12   a  and the lid part  12   b . The lid part  12   b  forms the upper part  20   a  of a portion that includes the outside air intake chamber  19 . The annular partition  34  includes a lid-side annular partition (a cylindrical wall portion of an upper intake chamber part)  30   e  that protrudes from an inner surface of the lid part  12   b  so as to surround the valve seat portion (cylindrical valve seat portion)  15   a , and a body-side annular partition (lower intake chamber part)  29   b  that is formed on the body part  12   a  so as to surround the top plate-outside air intake port  27  and be erected from the top surface plate  18   a . When the body part  12   a  and the lid part  12   b  are integrally joined to each other, the lower end portion of the lid-side annular partition (the cylindrical wall portion of the upper intake chamber part)  30   e  and the upper end portion of the body-side annular partition (lower intake chamber part)  29   b  come into close contact with each other. Accordingly, the annular partition  34  is provided so as to airtightly partition the outside air-intake flow passage. 
     In this embodiment, the lid part  12   b  forms the upper part  20   a  of a portion that includes the discharge nozzle portion  13  and the outside air intake chamber  19 . The lid part  12   b  is connected to the body part  12   a  by the hinge joint  12   c . After the lid part  12   b  is molded integrally with the body part  12   a  while being opened, the lid part  12  is rotated about the hinge joint  12   c . As a result, the lid part  12   b  is integrally joined to the body part  12   a  in such a manner that the lid part closes an upper portion of a portion including the discharge nozzle portion  13  and the outside air intake chamber  19 . Accordingly, the lateral discharge flow passage  17 , which is the tip-side discharge flow passage, is formed so as to communicate with the longitudinal discharge flow passage  16  through the lid part  12   b.    
     In this embodiment, the valve seat portion  15   a  of the intake valve mechanism  15  is formed of the cylindrical valve seat portion  15   a  that protrudes from the inner surface of the lid part  12   b  so as to surround the outside air intake port  14 . The valve portion  15   b  of the intake valve mechanism  15  is connected to the valve support portion (valve support piece)  28 , which is erected from the top surface plate  18   a  of the cap body portion  18 , in the form of a cantilever so as to be rotatable at a position corresponding to the valve seat portion (cylindrical valve seat portion)  15   a.    
     Moreover, in the nozzle cap-equipped discharge container  10  of this embodiment, as illustrated in  FIGS. 2 and 3 , the porous members  22 , which are to foam content liquid, are mounted inside the longitudinal discharge flow passage  16  that is provided in the nozzle cap  12  and sends the content liquid mixed with air to the discharge nozzle portion  13 . As also illustrated in  FIG. 5 , the tip supply port  26   a  of the liquid flow passage  24   a  to which the content liquid is pumped and supplied from the container body  11  and the tip supply ports  26   b  of the air flow passages  24   b  to which air is pumped and supplied from the container body  11  are opened at the inner surface of a portion of the longitudinal discharge flow passage  16  that is positioned below the porous members  22 . When seen in the lateral direction (a direction in which the porous members are seen laterally), the tip portion of the liquid flow passage  24   a  and the tip portion of the air flow passages  24   b  are formed so as to have a positional relationship where the extension line X from the tip supply port  26   a  of the liquid flow passage  24   a  in the content liquid supply direction and the extension lines Y from the tip supply ports  26   b  of the air flow passages  24   b  in the air supply direction do not extend parallel to each other and reach the lower surface of the porous member  22  before crossing each other. 
     In the nozzle cap-equipped discharge container  10  of this embodiment, the lower surface of the porous member  22  is disposed adjacent to the tip supply port  26   a  of the liquid flow passage  24   a  and the tip supply ports  26   b  of the air flow passages  24   b.    
     In the nozzle cap-equipped discharge container  10  of this embodiment, the plurality of porous members  22  are stacked and mounted inside the longitudinal discharge flow passage  16 , and, when seen in the lateral direction, the tip portion of the liquid flow passage  24   a  and the tip portion of the air flow passages  24   b  are formed so as to have a positional relationship where the extension line X from the tip supply port  26   a  in the content liquid supply direction and the extension lines Y from the tip supply ports  26   b  in the air supply direction reach the lower surface of the lowermost porous member  22  before crossing each other. 
     In this embodiment, the container body  11  of the squeeze foamer container  10  is a bottle-shaped blow molding that has flexibility and is made of plastic as illustrated in  FIG. 1 . The container body  11  includes a bottomed cylindrical body section  11   b  that has, for example, a substantially oval cross-sectional shape, a shoulder section  11   c  that is formed in the shape of a curved surface so that the diameter of the shoulder section  11   c  is reduced toward the upper side from an upper end portion of the body section  11   b , and the mouth neck section  11   a  (see  FIG. 3 ) that is formed in a cylindrical shape so as to protrude upward from an upper end portion of the shoulder section  11   c . The body section  11   b  has an outer diameter in the range of, for example, about 40 to 80 mm as an outer diameter to be easy to grasp with hands. The mouth neck section  11   a  has an outer diameter in the range of, for example, about 25 to 65 mm which is smaller than the outer diameter of the body section  11   b . Male threads with which the nozzle cap  12  is to be threadedly engaged are formed on the outer peripheral surface of the mouth neck section  11   a . For example, one of polyolefin-based resins, such as polypropylene (PP), high-density polyethylene (HDPE), medium-density polyethylene (MDPE), and low-density polyethylene (LDPE), and a polyester-based resin such as polyethylene terephthalate (PET) or a mixture of plural materials appropriately selected from them is used as the plastic material of the container body  11  so that squeeze deformation (press deformation) easily occurs. 
     In this embodiment, the nozzle cap  12  is an injection molding made of, for example, plastic, and the body part  12   a  and the lid part  12   b  are formed integrally with each other while being opened as illustrated in  FIG. 2 . For example, polypropylene (PP) can be used as a plastic material that is used to form the nozzle cap  12 . 
     As illustrated in  FIGS. 2 and 3 , the body part  12   a  of the nozzle cap  12  includes: the cap body portion  18 ; and a lower part  20   b  of a portion that includes the discharge nozzle portion  13  and the outside air intake chamber  19  and that is formed integrally with the top surface plate  18   a  so as to protrude upward from the top surface plate  18   a  of the cap body portion  18 . The outside air intake chamber  19  is formed in a region, which is present on one side of the longitudinal discharge flow passage  16  opposite to the lateral discharge flow passage  17 , of the nozzle cap  12  as an outer region that is present around the longitudinal discharge flow passage  16 . The outside air intake port  14  is opened at the outer peripheral surface of the upper intake chamber part  30   b  of the upper part  20   a  that forms the upper surface portion of the outside air intake chamber  19 . The lower part  20   b  of a portion, which includes the discharge nozzle portion  13  and the outside air intake chamber  19 , forms the discharge nozzle portion  13  and the outside air intake chamber  19  by being integrally joined to the upper part  20   a , which is formed by the lid part  12   b , of a portion that includes the discharge nozzle portion  13  and the outside air intake chamber  19 . Accordingly, the upper part  20   a , which is formed by the lid part  12   b , includes a region of the discharge nozzle portion  13  that includes a portion directly above the longitudinal discharge flow passage  16 . The discharge nozzle portion  13 , which is the discharge section, protrudes upward from the top surface plate  18   a  of the body part  12   a  and is formed integrally with the top surface plate  18   a.    
     The cap body portion  18  includes: the disc-shaped top plate portion  18   a ; and a mounting skirt portion  18   b  that extends downward from the peripheral edge portion of the top plate portion  18   a  and that is formed in a cylindrical shape. Female threads, which are to be engaged with the male threads formed on the outer peripheral surface of the mouth neck section  11   a  of the container body  11 , are formed on the inner peripheral surface of the mounting skirt portion  18   b . An inner ring  18   c  is provided inside the mounting skirt portion  18   b  so as to be disposed concentrically with the mounting skirt portion  18   b  with an interval therebetween and protrude from the lower surface of the top plate portion  18   a  in an annular shape (see  FIG. 3 ). When the nozzle cap  12  is mounted on the mouth neck section  11   a  of the container body  11 , the inner ring  18   c  is disposed so as to come into close contact with the inner peripheral surface of a tip opening of the mouth neck section  11   a . Accordingly, the inner ring  18   c  improves sealing performance at the rim of the tip opening. 
     In this embodiment, an upper end opening surface is formed at the top plate portion  18   a  of the cap body portion  18  so that a two-stage cylindrical portion  21  is formed integrally with the top plate portion  18   a  at an eccentric position that is closer to the tip discharge port  13   a  of the discharge nozzle portion  13  than the central portion of the top plate portion  18   a  (see  FIG. 3 ). The two-stage cylindrical portion  21  has a two-stage structure that includes a large-diameter cylinder section  21   a  located on an upper side and a small-diameter cylinder section  21   b  located on a lower side. The large-diameter cylinder section  21   a  located on an upper side forms the longitudinal discharge flow passage  16  for content liquid that sends upward the content liquid fed from the container body  11 . That is, in the nozzle cap-equipped discharge container  10  of this embodiment, the upper end portion of the longitudinal discharge flow passage  16  and the top surface plate  18   a  of the cap body portion  18 , which is formed by the body part  12   a , are formed flush with each other and connected to each other. In this embodiment, the plurality of (three in this embodiment) porous members  22  made of, for example, a mesh-like material are stacked and mounted inside the longitudinal discharge flow passage  16  that is formed by the large-diameter cylinder section  21   a . It is possible to discharge content liquid from the tip discharge port  13   a  of the discharge nozzle portion  13  in the form of foam by making the content liquid pass through the porous members  22  while mixing the content liquid with air. Further, since the upper end portion of the longitudinal discharge flow passage  16  and the top surface plate  18   a  of the cap body portion  18  are connected to each other and are flush with each other, the height of the container can be reduced. Accordingly, the container can be formed to be compact. Furthermore, since the porous members  22  can be inserted into the large-diameter cylinder section  21   a  of the two-stage cylindrical portion  21  so as to be along with the top surface plate  18   a , workability during assembly can be improved. 
     An upper end portion of a dip tube  23 , which extends to the bottom part of the container body  11 , is mounted on the small-diameter cylinder section  21   b  located on a lower side of the two-stage cylindrical portion  21 . Accordingly, the small-diameter cylinder section  21   b  forms the liquid flow passage  24   a  together with the upper end portion of the dip tube  23 . The liquid flow passage  24   a  feeds content liquid to the longitudinal discharge flow passage  16 , which is formed by the large-diameter cylinder section  21   a , by an operation for pressing the container body  11 . 
     Further, in this embodiment, an annular flange  21   c  is formed at a stepped portion between the large-diameter cylinder section  21   a  and the small-diameter cylinder section  21   b , and a plurality of air holes  25  are formed in the annular flange  21   c  at intervals in a circumferential direction so as to pass through the annular flange  21   c  in the longitudinal direction. The air holes  25  form the air flow passages  24   b . By an operation for pressing the container body  11 , the air flow passages  24   b  feed air, which is present in the container body  11 , to the longitudinal discharge flow passage  16 , at the same time of feeding content liquid to the longitudinal discharge flow passage  16  through the liquid flow passage  24   a , which is formed by the dip tube  23  and the small-diameter cylinder section  21   b.    
     The content liquid and air fed to the longitudinal discharge flow passage  16 , which is formed by the large-diameter cylinder section  21   a , through the liquid flow passage  24   a  and the air flow passages  24   b  by an operation for pressing the container body  11  pass through the porous members  22  mounted in the longitudinal discharge flow passage  16  while being mixed with each other in the longitudinal discharge flow passage  16 , and, the content liquid is easily foamed and becomes fine. The content liquid, which becomes fine foam by being foamed, is sent to the lateral discharge flow passage  17  formed by the discharge nozzle portion  13 , and is discharged from the tip discharge port  13   a  in the form of foam. 
     Here, in this embodiment, as illustrated in  FIG. 5 , the lower surface of the porous member  22  is disposed adjacent to the tip supply port  26   a  of the liquid flow passage  24   a , which is formed by the dip tube  23  and the small-diameter cylinder section  21   b , and the tip supply ports  26   b  of the air flow passages  24   b  that are formed by the air holes  25 . Further, when seen in the lateral direction, the tip portion of the liquid flow passage  24   a  and the tip portion of the air flow passages  24   b  are formed so as to have a positional relationship where the extension line X from the tip supply port  26   a  of the liquid flow passage  24   a  in the content liquid supply direction and the extension lines Y from the tip supply ports  26   b  of the air flow passages  24   b  in the air supply direction reach the lower surface of the porous member  22  before crossing each other. 
     Accordingly, when air passes through each porous member  22 , turbulence such as eddies is generated due to the collision between the air and each porous member  22  and the air and content liquid are mixed with each other while causing turbulence. Accordingly, high-quality foam can be generated. 
     Further, in this embodiment, the porous members  22  mounted in the longitudinal discharge flow passage  16 , which is formed by the large-diameter cylinder section  21   a , are porous members  22  made of, for example, a mesh-like material. Preferably, a molded mesh can be used as the porous member. Since it is possible to manufacture the molded mesh by using a molding machine in such a manner that an outer peripheral frame portion  22   a  and a mesh plate portion  22   b  to be described below are integrated, the molded mesh is inexpensive and a plurality of porous members  22  can be easily stacked and mounted inside the longitudinal discharge flow passage  16 . Furthermore, it is preferable that the plurality of molded meshes  22  are stacked and mounted inside the longitudinal discharge flow passage  16 , and it is preferable that the plurality of molded meshes  22  are stacked, disposed, and mounted in such a manner that the positions of mesh holes deviate from one another when seen from above. It is possible to form foam, which is finer and has higher quality, by these porous members. Meanwhile, a method of mounting the molded meshes  22  in such a manner that the molded meshes  22  adjacent to each other in the longitudinal direction are rotated relative to each other in the circumferential direction by a predetermined rotation angle, a method of changing the positions or the number of the mesh holes of the molded mesh  22  adjacent to each other in the longitudinal direction, or the like can be employed as a method of stacking and disposing the molded meshes  22  in such a manner that the positions of mesh holes deviate from one another. 
     As illustrated in  FIGS. 2 and 5 , the molded mesh  22  has a two-stage structure that includes the thick annular outer peripheral frame portion  22   a  and the mesh plate portion  22   b . The outer peripheral edge portion of the mesh plate portion  22   b  is joined to the outer peripheral frame portion  22   a , so that the mesh plate portion  22   b  covers the inner opening of the outer peripheral frame portion  22   a  and is provided in the form of a membranella at the middle portion of the outer peripheral frame portion  22   a  in a thickness direction. The mesh plate portion  22   b  is provided in the form of a membranella at the middle portion of the outer peripheral frame portion  22   a  in a thickness direction, and is provided with a plurality of mesh holes. Accordingly, since the plurality of molded meshes  22 , which are mounted in the longitudinal discharge flow passage  16 , are stacked in such a manner that the outer peripheral frame portions  22   a  come into contact with each other as support legs, a space can be ensured between the mesh plate portions  22   b  of the molded meshes  22  adjacent to each other in the longitudinal direction. Further, content liquid and air, which are pumped from the tip supply port  26   a  of the liquid flow passage  24   a  and the tip supply ports  26   b  of the air flow passages  24   b  and pass through the mesh plate portion  22   b  through the plurality of mesh holes and infiltrate into the back side of the mesh plate portion  22   b  after reaching the mesh plate portion  22   b  forming the lower surface of the lowermost molded mesh  22  before being mixed with each other as described below, pass through the upper mesh plate portion  22   b  while being effectively mixed with each other in the space, which is ensured between the mesh plate portions  22   b  adjacent to each other in the longitudinal direction, as a mixing space. Therefore, it is possible to form foam, which is finer and has higher quality, by these porous members. It is also possible to form foam, which is finer and has higher quality, by napping the molded meshes. 
     Meanwhile, in the invention, well-known various foam fining members, which are formed of sponge, sintered metal, or the like other than a mesh-like material, such as the molded mesh  22 , and fine foam formed of a mixture of content liquid and air, can be used as the porous member  22  that is mounted in the longitudinal discharge flow passage  16 . Further, the plurality of porous members  22  does not necessarily need to be stacked and mounted inside the longitudinal discharge flow passage  16 , and one or a plurality of porous members  22  can be mounted and used in the longitudinal discharge flow passage  16  according to the size, the shape, or the like of the porous member  22 . 
     Furthermore, in this embodiment, as illustrated in  FIG. 5 , the lower surface of the porous member  22 , which is formed by the mesh plate portion  22   b  of the lowermost molded mesh  22 , is disposed adjacent to the tip supply port  26   a  of the liquid flow passage  24   a , which is formed by the dip tube  23  and the small-diameter cylinder section  21   b , and the tip supply ports  26   b  of the air flow passages  24   b  that are formed by the air holes  25 . Moreover, when seen in the lateral direction, the tip portion of the liquid flow passage  24   a  and the tip portion of the air flow passages  24   b  are formed so as to have a positional relationship where the extension line X from the tip supply port  26   a  in the content liquid supply direction and the extension lines Y from the tip supply ports  26   b  in the air supply direction do not extend parallel to each other and reach the lower surface of the lowermost porous member  22  before crossing each other. That is, the respective portions are designed and disposed in such a manner that the extension line X in the content liquid supply direction and the extension lines Y in the air supply direction do not extend parallel to each other, and do not cross each other on at least the lower surface of the lowermost porous member  22  (the lower surface formed by the mesh plate portion  22   b  of the lowermost molded mesh  22 ). For example, the tip supply ports  26   b  of the air flow passages  24   b  may be disposed not to be perpendicular to the mesh plate portion  22   b  of the molded mesh  22 . Meanwhile, in terms of the formation of foam, which is finer and has higher quality, it is preferable that the respective portions are designed and disposed so that the extension line X in the content liquid supply direction and the extension lines Y in the air supply direction do not cross each other even on the lower surface of the uppermost porous member  22  (the lower surface formed by the mesh plate portion  22   b  of the uppermost molded mesh  22 ). 
     In addition, in this embodiment, as illustrated in  FIG. 3 , the top plate portion-outside air intake port  27  is formed in a region, which is present on one side of the longitudinal discharge flow passage  16  opposite to the tip discharge port  13   a  of the discharge nozzle portion  13 , of the top plate portion  18   a  of the cap body portion  18  so as to be disposed directly below the outside air intake chamber  19 . The top plate portion-outside air intake port  27  allows the outside air intake chamber  19 , which is formed so as to be disposed above the top surface plate  18   a , to communicate with the container body  11 . Accordingly, since the pressure of an inner space of the outside air intake chamber  19  in which the intake valve mechanism  15  is provided is the same as the pressure of an inner space of the container body  11 , the outside air intake port  14  can be smoothly opened and closed by the intake valve mechanism  15  with an operation for pressing the container body  11  or releasing the pressing of the container body. 
     Moreover, in this embodiment, the valve support piece  28  is provided as a valve support portion so as to be integrally erected upward from the top surface plate  18   a  at the rim of the opening of the top plate portion-outside air intake port  27 . The thin plate-like valve portion  15   b  of the intake valve mechanism  15 , which is connected to the tip portion of the valve support piece  28  in the form of a cantilever, is provided so as to be rotated by an elastic force thereof. 
     Here, a method of connecting the valve portion  15   b  to the tip portion of the valve support piece  28  is not particularly limited. The valve portion  15   b  and the valve support piece  28  may be integrally molded so as to be connected to each other, or a valve portion  15   b  and a valve support piece  28 , which are manufactured as separate parts, may be connected to each other by heat sealing or the like. 
     As illustrated in  FIG. 2 , the lower part  20   b , which forms the body part  12   a  of the nozzle cap  12  together with the cap body portion  18 , is a substantially lower half part of a portion including the discharge nozzle portion  13  and the outside air intake chamber  19 , and includes a lower nozzle part  29   a , a lower intake chamber part (body-side annular partition)  29   b , lower connecting parts  29   c , and lower hinge parts  29   d  in this embodiment. 
     Preferably, the lower nozzle part  29   a  is formed in a shape including the top plate portion  18   a  of the cap body portion  18  as a bottom surface and includes side walls erected from the top plate portion  18   a , and has a substantially U shaped cross-sectional shape in which an open side is disposed at an upper portion (a cross-sectional shape having three sides in which one side of a tetragon is removed to form an open side, or the shape of a rain gutter or a channel steel of which the upper side is opened). The lower nozzle part  29   a  is formed so as to extend in the lateral direction along the top plate portion  18   a  from a portion of the top plate portion  18   a  of the cap body portion  18  where the longitudinal discharge flow passage  16  is opened. A base end portion, which is located closer to the longitudinal discharge flow passage  16 , of the lower nozzle part  29   a  is closed by a lower butting wall  32   a  that is curved in a substantially semicircular shape. A tip portion of the lower nozzle part  29   a  present on one side of a portion, at which the longitudinal discharge flow passage  16  is opened, opposite to the lower butting wall  32   a  protrudes outward from the peripheral edge portion of the top plate portion  18   a , and extends so as to be slightly bent downward. 
     The lower intake chamber part  29   b  is a portion that forms the body-side annular partition, and is a cylindrical portion that is disposed on one side of the substantially semicircular lower butting wall  32   a  of the lower nozzle part  29   a  opposite to the longitudinal discharge flow passage  16  and that is erected from the top surface plate  18   a  of the cap body portion  18 . The lower intake chamber part  29   b  protrudes upward from the top surface plate  18   a  so as to have a height equal to the height of the lower nozzle part  29   a , and is formed so as to have an outer diameter equal to the outer width of the lower nozzle part  29   a . The valve portion  15   b  is provided inside the lower intake chamber part  29   b  so as to be rotatably supported by the valve support piece  28  erected from the top surface plate  18   a  as described above. 
     The lower connecting parts  29   c  are portions that smoothly connect the outer peripheral surface of the lower nozzle part  29   a  to the outer peripheral surface of the lower intake chamber part  29   b . A pair of lower connecting parts  29   c  is disposed so as to have an outer width equal to the outer width of the lower nozzle part  29   a . The lower connecting parts  29   c  are provided at both side portions of the lower part  20   b  so as to partition a portion between the lower nozzle part  29   a  and the lower intake chamber part  29   b . Compartments  29   e , which are surrounded by the lower nozzle part  29   a , the lower intake chamber part  29   b , and the lower connecting parts  29   c  and have a substantially triangular hollow cross-sectional shape, are formed inside the lower connecting parts  29   c.    
     The lower hinge parts  29   d  are a pair of longitudinal rib-shaped portions protruding outward from the outer peripheral surface of the lower intake chamber part  29   b  that is present on one side of the lower connecting parts  29   c  opposite to the lower nozzle part  29   a . Tip edge portions of upper end faces of the lower hinge parts  29   d  are joined to tip edge portions of lower end faces of upper hinge parts  30   d  so as to be bendable relative to the tip edge portions of the lower end faces of the upper hinge parts  30   d , and form the hinge joint  12   c.    
     The upper part  20   a , which forms the lid part  12   b , is a substantially upper half part of the portion including the discharge nozzle portion  13  and the outside air intake chamber  19 , and includes an upper nozzle part  30   a , an upper intake chamber part  30   b , upper connecting parts  30   c , and upper hinge parts  30   d  in this embodiment. 
     Since the upper nozzle part  30   a  is formed so as to includes a region directly above the longitudinal discharge flow passage  16 , and has a substantially U shaped cross-sectional shape in which an open side is disposed at a lower portion (a cross-sectional shape having three sides in which one side of a tetragon is removed to form an open side, or the shape of a rain gutter or a channel steel of which the lower side is opened). The upper nozzle part  30   a  has a two-stage structure in which each of both side wall portions  31  of the upper nozzle part  30   a  includes an outer side wall portion  31   a  and an inner side wall portion  31   b . The outer side wall portions  31   a  are formed so as to have an outer width equal to the outer width of the lower nozzle part  29   a , and are formed so as to have a height and a length equal to the height and the length of the lower nozzle part  29   a . When the lid part  12   b  is closed, the lower end faces of the outer side wall portions  31   a  come into close contact with upper end faces of both side wall portions of the lower nozzle part  29   a , respectively. 
     The inner side wall portions  31   b  are formed so as to have an outer width equal to the inner width of the lower nozzle part  29   a , and are formed so as to be higher than the outer side wall portions  31   a  over the entire length of the outer side wall portions  31   a . End portions, which are located close to the upper intake chamber part  30   b , of both the inner side wall portions  31   b  are connected to each other by an upper butting wall  32   b  that is formed so as to be higher than the inner side wall portion  31   b  and is curved in a substantially semicircular shape. Accordingly, a base end portion, which is located close to the upper intake chamber part  30   b , of the upper nozzle part  30   a  is closed by the substantially semicircular upper butting wall  32   b . The radius of curvature of the outer peripheral surface of the substantially semicircular upper butting wall  32   b  is substantially equal to the radius of curvature of the inner peripheral surface of the substantially semicircular lower butting wall  32   a.    
     When the lid part  12   b  is closed, the lower end faces of the outer side wall portions  31   a  come into close contact with the upper end faces of both the side wall portions of the lower nozzle part  29   a , and the inner side wall portions  31   b  are mounted so as to be fitted into the inside of the side wall portions of the lower nozzle part  29   a  in a state that the outer surface of the inner side wall portions  31   b  come into close contact with the inner surfaces of both the side wall portions of the lower nozzle part  29   a . Further, when the lid part  12   b  is closed, the upper butting wall  32   b  is mounted so as to be fitted into the inside of the lower butting wall  32   a  in a state that the outer peripheral surface of the upper butting wall  32   b  comes into close contact with the inner peripheral surface of the lower butting wall  32   a  of the lower nozzle part  29   a , so that the discharge nozzle portion  13  in which the lower nozzle part  29   a  and the upper nozzle part  30   a  are integrated with each other is formed by these walls and portions. 
     Furthermore, in this embodiment, when the lid part  12   b  is closed, the tip of the upper butting wall  32   b  is disposed inside the upper end opening of the longitudinal discharge flow passage  16  formed by the large-diameter cylinder section  21   a  of the two-stage cylindrical portion  21  and is positioned directly above the outer peripheral frame portion  22   a  forming the outer peripheral edge portion of the porous member  22 . Accordingly, the upper butting wall  32   b  functions as a pressing wall and can stably fix the porous members  22  that are mounted in the large-diameter cylinder section  21   a.    
     In addition, the upper butting wall  32   b  is disposed at the end portion located opposite to the tip discharge port  13   a  of the lateral discharge flow passage  17 , at the corner where the lateral discharge flow passage  17  and the longitudinal discharge flow passage  16  communicate with each other, and functions as the butting wall that closes the end portion located opposite to the tip discharge port  13   a  of the lateral discharge flow passage. In this embodiment, the inner surface of the butting wall formed of the upper butting wall  32   b  has a curved shape, and preferably has a substantially semicircular cross-sectional shape that is curved in an arc shape. The butting wall is not limited to a wall having this shape, and may be a wall having, for example, a U shaped cross-sectional shape in which an open side is disposed to face the tip discharge port  13   a  (a cross-sectional shape having three sides in which one side of a tetragon is removed to form an open side) or a C-shaped cross-sectional shape in which an open side is disposed to face the tip discharge port  13   a . Further, the butting wall formed of the upper butting wall  32   b  may have a shape in which a notch or a slit is formed at a part (a portion close to the tip discharge port  13   a ) of a side surface of a pipe (of which the cross-sectional shape may be a circular shape, a quadrangular shape, or other shapes). 
     When the upper butting wall  32   b  is formed in the above-mentioned shape, the discharge direction of the content liquid, which is contained in the container body  11 , can be easily changed to the side of the tip discharge port  13   a  of the lateral discharge flow passage  17  while the porous members  22  can be stably fixed. Accordingly, the discharge container  10  can be formed to be compact. 
     The upper intake chamber part  30   b  is a portion that is disposed on one side of the substantially semicircular upper butting wall  32   b  of the upper nozzle part  30   a  opposite to the upper nozzle part  30   a . The upper intake chamber part  30   b  includes a top surface portion of the lid part  12   b  as an upper surface portion of the outside air intake chamber  19 , and includes a cylindrical wall portion  30   e  that protrudes downward from the inner surface of the top surface portion of the lid part  12   b  in a cylindrical shape. The cylindrical wall portion  30   e  is a portion of a lid-side annular partition that forms the annular partition  34  together with the lower intake chamber part  29   b . The cylindrical wall portion (lid-side annular partition)  30   e  of the upper intake chamber part  30   b  protrudes so as to have a height higher than the height of the outer side wall portion  31   a  of the upper nozzle part  30   a , and has an outer diameter equal to the inner diameter of the lower intake chamber part  29   b  of the lower part  20   b . The cylindrical valve seat portion  15   a , which is disposed concentrically with the cylindrical wall portion  30   e  and protrudes from the inner surface of the lid part  12   b  in a cylindrical shape so as to surround the outside air intake port  14  formed at the upper surface portion of the outside air intake chamber  19 , is provided inside the cylindrical wall portion  30   e . The cylindrical valve seat portion  15   a  is formed so as to have a height equal to the height of the outer side wall portion  31   a  of the upper nozzle part  30   a . Further, an outer peripheral contact wall  33  is formed outside a region of a substantially semicircular portion, which is located closer to the hinge joint  12   c , of the cylindrical wall portion  30   e  of the upper intake chamber part  30   b . The outer peripheral contact wall  33  is continued to both the outer side wall portions  31   a  of the upper nozzle part  30   a  through both the upper connecting parts  30   c  so as to have a height equal to the height of the outer side wall portion  31   a , and is integrally formed along the outer peripheral surface of the cylindrical wall portion  30   e.    
     When the lid part  12   b  is closed, the lower end face of the outer peripheral contact wall  33  formed outside the cylindrical wall portion  30   e  comes into contact with the upper end face of a region of the substantially semicircular portion, which is located closer to the hinge joint  12   c , of the lower intake chamber part  29   b  as illustrated in  FIGS. 3 and 4 . Furthermore, the lower end portion, which protrudes downward from the outer peripheral contact wall  33 , of the cylindrical wall portion  30   e  of the upper intake chamber part  30   b  is mounted so as to be fitted into the inside of the lower intake chamber part  29   b  in a state that the outer peripheral surface of the lower end portion, which protrudes downward from the outer peripheral contact wall  33 , of the cylindrical wall portion  30   e  of the upper intake chamber part  30   b  comes into close contact with the inner surface of the upper end portion of the lower intake chamber part  29   b . Accordingly, the lower end portion of the lid-side annular partition, which is formed of the cylindrical wall portion  30   e , and the upper end portion of the body-side annular partition  29   b  come into close contact with each other and are firmly joined to each other, so that the annular partition  34  in which the cylindrical wall portion  30   e  and the body-side annular partition  29   b  are integrated with each other is formed. The annular partition  34  is provided so as to airtightly partition the outside air-intake flow passage, which extends from the outside air intake port  14  to the top plate portion-outside air intake port  27 , together with the upper surface portion of the outside air intake chamber  19  and the top plate portion  18   a  of the cap body portion  18 . Accordingly, the outside air intake chamber  19 , which is disposed above the top surface plate  18   a  of the cap body portion  18  of the nozzle cap  12  and includes the annular partition  34  partitioning a periphery of the intake valve mechanism  15 , is formed. 
     Further, since the tip portion of the cylindrical wall portion  30   e  of the upper intake chamber part  30   b  is mounted so as to be fitted into the inside of the lower intake chamber part  29   b  in a state that the outer peripheral surface of the tip portion of the cylindrical wall portion  30   e  comes into close contact with the inner surface of the lower intake chamber part  29   b , the annular partition  34  is formed outside the intake valve mechanism  15 . The annular partition  34  includes the cylindrical wall portion  30   e  of the upper intake chamber part  30   b  and the lower intake chamber part  29   b  that partition a periphery of the intake valve mechanism  15 . The upper end portion of the annular partition  34  is joined to the inner surface of the outside air intake chamber  19  so as to surround the outside air intake port  14 , and the lower end portion of the annular partition  34  is joined to the top plate portion  18   a  of the cap body portion  18  so as to surround the top plate portion-outside air intake port  27 . Accordingly, the annular partition  34  is provided so as to airtightly partition the outside air-intake flow passage which extends from the outside air intake port  14  to the top plate portion-outside air intake port  27 . 
     Since the annular partition  34 , which includes the cylindrical wall portion  30   e  of the upper intake chamber part  30   b  and the lower intake chamber part  29   b , is provided so as to airtightly partition the outside air-intake flow passage which extends from the outside air intake port  14  to the top plate portion-outside air intake port  27 , it is possible to avoid the leakage of air, which passes through the outside air-intake flow passage (which extends from the outside air intake port  14  to the top plate portion-outside air intake port  27  and in which the intake valve mechanism  15  is disposed), to the outside of the annular partition  34  which is caused by an operation for grasping and pressing the container body  11  with hands or releasing the pressing of the container body. Accordingly, it is possible to improve the responsiveness of the intake valve mechanism  15  and to improve the ease of use of the nozzle cap-equipped discharge container  10 . 
     Further, in this embodiment, when the lid part  12   b  is closed, the lower end face of the cylindrical valve seat portion  15   a , which protrudes downward from the inner surface of the lid part  12   b  so as to surround the outside air intake port  14 , comes into close contact with the upper end face  28   a , to which the valve portion  15   b  is connected in the form of a cantilever, of the valve support piece  28 , which is erected upward from the top plate portion  18   a  of the cap body portion  18 , inside the outside air intake chamber  19  as illustrated in  FIG. 4 . Accordingly, since the valve portion  15   b  is rotatable about a portion thereof connected to the valve support piece  28  and can come into close contact with the lower end face of the cylindrical valve seat portion  15   a , the intake valve mechanism  15  capable of opening and closing the outside air intake port  14  can be easily formed inside the outside air intake chamber  19 . 
     Meanwhile, when the container body  11  is not pressed in this embodiment, the valve portion  15   b  is connected to the valve support piece  28  in the form of a cantilever in such a manner that a predetermined gap is formed between the lower end face of the cylindrical valve seat portion  15   a  and the valve portion  15   b  ( FIG. 4 ). Further, when the container body  11  is pressed, the valve portion  15   b  is elastically deformed about the portion thereof connected to the valve support piece  28  due to an increase in the internal pressure of the container body, and, thereby, the valve portion  15   b  comes into close contact with the lower end face of the cylindrical valve seat portion  15   a.    
     In this embodiment, it is preferable that the valve portion  15   b , which moves according to the change in pressure, is provided so as to directly face the top plate portion-outside air intake port  27 , and it is more preferable that an object hindering the flow of air is not provided between the valve portion  15   b  and the top plate portion-outside air intake port  27 . 
     In the nozzle cap-equipped discharge container  10  of this embodiment having the above-mentioned structure, the body part  12   a  and the lid part  12   b  of the nozzle cap  12  are integrally molded while being opened as described above. While the body part  12   a  and the lid part  12   b  are opened, from the above, for example, three porous members  22  are stacked and mounted inside the longitudinal discharge flow passage  16  formed by the large-diameter cylinder section  21   a  of the two-stage cylindrical portion  21 . After that, the lid part  12   b  is rotated about the hinge joint  12   c  so that the body part  12   a  and the lid part  12   b  are integrally joined to each other. Accordingly, an upper portion of the lower part  20   b  of a portion, which includes the discharge nozzle portion  13  and the outside air intake chamber  19 , is closed by the upper part  20   a , so that the discharge nozzle portion  13  and the outside air intake chamber  19  are formed, and the nozzle cap  12  in which the intake valve mechanism  15  including the cylindrical valve seat portion  15   a  and the valve portion  15   b  is provided inside the outside air intake chamber  19  is easily formed. 
     When the cap body portion  18  is mounted on the mouth neck section  11   a  in a state that the upper end portion of the dip tube  23  is mounted in the small-diameter cylinder section  21   b  of the two-stage cylindrical portion  21  provided in the cap body portion  18  of the nozzle cap  12 , the formed nozzle cap  12  is mounted integrally with the container body  11 . Accordingly, the nozzle cap-equipped discharge container  10  of this embodiment is formed. 
     Further, according to the nozzle cap-equipped discharge container  10  of this embodiment having the above-mentioned structure, the structure of the nozzle cap and a step of assembling the nozzle cap can be further simplified, and the container  10  can be formed to be more compact through the further reduction of the height of the nozzle cap protruding from the mouth neck section of the container body. 
     That is, according to this embodiment, the nozzle cap  12  has a two-part structure that includes the body part  12   a  and the lid part  12   b . Accordingly, in a state that the lid part  12   b  is opened relative to the body part  12   a , the porous members  22 , which are to foam, for example, content liquid by work or an operation performed from above the longitudinal discharge flow passage  16 , can be easily and smoothly mounted on the longitudinal discharge flow passage  16 . Accordingly, unlike in the nozzle cap-equipped discharge container in the related art, the longitudinal discharge flow passage, which includes the porous members, the valve mechanism, and the like, does not need to be formed of a member separate from the nozzle cap and does not need to be assembled with the nozzle cap later, or the porous member, the valve mechanism, or the like does not need to be mounted on the longitudinal discharge flow passage by work or an operation performed from below the nozzle cap. For this reason, the longitudinal discharge flow passage can be easily formed integrally with the nozzle cap  12 . Accordingly, the structure of the nozzle cap and a step of assembling the nozzle cap can be further simplified. Therefore, since the nozzle cap  12  can be formed in such a manner that the height of the nozzle cap  12  is further reduced, it is possible to easily make the container compact and to form the container at a lower cost by effectively reducing the number of parts to be used or the amount of a resin to be used. 
     In addition, when content liquid contained in the container body  11  is likely to be solidified by coming into contact with, for example, air, it is possible to easily remove solidified content liquid by cleaning the flow passage or the like for the content liquid in a state that the lid part  12   b  is opened relative to the body part  12   a.    
     Moreover, in the case that the discharge section is the discharge nozzle portion  13  including the lateral discharge flow passage  17  as the tip-side discharge flow passage, the discharge nozzle portion  13  can be formed in such a manner that the tip discharge port  13   a  of the discharge nozzle portion  13  faces downward as illustrated in  FIGS. 1 and 2 . In the case that tip discharge port  13   a  is formed so as to face downward, content liquid can be discharged to the palm of the hand even though the container body  11  is pressed (squeezed) while being erected without being tilted. In the case that the nozzle cap does not have a two-part structure including the body part and the lid part, that is, when the nozzle cap is integrally molded, a hollow pipe provided with a downward tip discharge port is separately prepared and the hollow pipe needs to be inserted into a lateral discharge flow passage that is laterally oriented as in a container disclosed in, for example, WO2011/075640 due to limitations on the structure of a mold that is used to mold the nozzle cap. 
     In addition, according to the nozzle cap-equipped discharge container  10  of this embodiment, it is possible to easily form the intake valve mechanism  15 , which opens and closes the outside air intake port  14 , without using a valve member, which is separately formed as a separate part made of a material different from the resin material of the nozzle cap  12 , by a simple structure and a simple assembling step in which the lid part  12   b  is integrally joined to the body part while being rotated and closed after the nozzle cap  12  is integrally molded in a state that the body part  12   a  and the lid part  12   b  are opened. 
     Further, according to the nozzle cap-equipped discharge container  10  of this embodiment having the above-mentioned structure, since the change of pressure in the container body  11  is instantly transmitted to the valve portion  15   b , the responsiveness of the simple intake valve mechanism  15  including the valve portion  15   b  is further improved. As a result, it is possible to improve usability. 
     That is, according to the nozzle cap-equipped discharge container  10  of this embodiment, the valve mechanism  15 , which opens and closes the outside air intake port  14 , has a simple structure that includes the valve seat portion  15   a  provided on the inner surface of the outside air intake chamber  19  and the valve portion  15   b  capable of coming into close contact with the valve seat portion  15   a ; the outside air intake chamber  19  includes the annular partition  34  that partitions a periphery of the intake valve mechanism  15 ; and the annular partition  34  is provided so as to airtightly partition the outside air-intake flow passage, which extends from the outside air intake port  14  to the top plate portion-outside air intake port  27 . Accordingly, it is possible to reliably avoid the leakage of air that is caused by an operation for grasping and pressing the container body  11  or releasing the pressing of the container body when air passes through the outside air-intake flow passage in which the intake valve mechanism  15  is disposed, to the outside of the annular partition  34 . Therefore, since the change of pressure in the container body  11  is instantly transmitted to the valve portion  15   b , the responsiveness of the valve mechanism can be effectively improved. As a result, it is possible to improve the ease of use of the nozzle cap-equipped discharge container  10 . 
     Further, according to the nozzle cap-equipped discharge container  10  of this embodiment, the porous members  22  are mounted inside the longitudinal discharge flow passage  16  from above in a state that the body part  12   a  and the lid part  12   b  are opened; and the body part  12   a  and the lid part  12   b , which are opened, are closed and integrally joined to each other, so that the intake valve mechanism  15  for opening and closing the outside air intake port  14  is formed. Accordingly, since the nozzle cap  12 , which has a function as a squeeze foamer for foaming the content liquid and discharging the content liquid in the form of foam, can be formed so that the height of the nozzle cap  12  is further reduced, it is possible to easily make the container compact and to form the container at a lower cost by effectively reducing the number of parts to be used or the amount of a resin to be used. 
     Furthermore, according to the nozzle cap-equipped discharge container  10  of this embodiment having the above-mentioned structure, it is possible to make the nozzle cap  12  compact by reducing the height of the nozzle cap  12  and to foam content liquid while mixing the content liquid with air without the deterioration of the quality of foam. 
     That is, in this embodiment, the porous members  22  are stacked and mounted inside the longitudinal discharge flow passage  16  that is opened at the top plate portion  18   a  of the cap body portion  18  and is formed by the large-diameter cylinder section  21   a  of the two-stage cylindrical portion  21 , and a gas-liquid mixing chamber is not formed below the porous members  22  of the longitudinal discharge flow passage  16 . Accordingly, it is possible to make the nozzle cap  12  compact by reducing the height of the nozzle cap  12  through the reduction of the length of the longitudinal discharge flow passage  16 . 
     Further, in this embodiment, when seen in the lateral direction, the tip portion of the liquid flow passage  24   a  and the tip portion of the air flow passages  24   b  are formed so as to have a positional relationship where the extension line X from the tip supply port  26   a  of the liquid flow passage  24   a  in the content liquid supply direction and the extension lines Y from the tip supply ports  26   b  of the air flow passages  24   b  in the air supply direction reach the lower surface of the porous member  22  before crossing each other. Accordingly, since the content liquid pumped from the tip supply port  26   a  of the liquid flow passage  24   a  and the air pumped from the tip supply ports  26   b  of the air flow passages  24   b  reach the lower surface of the lowermost molded mesh  22  before being mixed with each other, it is possible to form foam, which is fine and has high quality, by an effect in which turbulence such as eddies is generated due to the collision between each molded mesh and the air and the content liquid and the air and the content liquid are mixed with each other while causing turbulence when the air and the content liquid pass through each molded mesh  22  (each porous member  22 ). 
     Therefore, according to the nozzle cap-equipped discharge container  10  of this embodiment, even though a gas-liquid mixing chamber is not particularly formed or a gas-liquid mixing chamber is formed so as to have a small height, it is possible to foam the content liquid as fine foam while mixing the content liquid with air without the deterioration of the quality of foam. 
     The invention is not limited to the above-mentioned embodiment and may have various modifications. For example, the nozzle cap-equipped discharge container of the invention does not necessarily need to be a squeeze foamer container, and may be other squeeze containers such as squeeze-type double release containers, which discharge content liquid from a discharge nozzle portion when a container body is pressed (squeezed). Further, the nozzle cap-equipped discharge container of the invention does not necessarily need to be a squeeze container that discharges content liquid when a container body is pressed, and may be various other discharge containers such as pump containers having a function to discharge content liquid, which is fed when the inside of a container body is pressurized, from a discharge nozzle portion. In containers other than these squeeze foamer containers, other necessary components or members other than porous members are mounted in a longitudinal discharge flow passage from above the longitudinal discharge flow passage in a state that a body part and a lid part are opened. Accordingly, the same functions and effects as the squeeze foamer container are obtained. 
     Furthermore, the lid part does not necessarily need to form the upper part of a portion that includes a whole of the discharge nozzle portion, and may form the upper part of only a region, which includes a portion directly above the longitudinal discharge flow passage, of the discharge nozzle portion. The lid part does not necessarily need to be connected to the body part by the hinge joint, and may be molded as a part separate from the body part. Moreover, the outside air intake chamber may not be provided in the nozzle cap. 
     Further, the valve portion does not necessarily need to be connected to the body part in the form of a cantilever. For example, the valve portion may be a valve portion in which a plurality of through slits are formed radially from the center of a rubber plate to form a plurality of valve pieces. In this case, it is preferable that the valve portion is mounted in such a manner that the center of the rubber plate (an origin of the radial through slits) corresponds to the axial center of the cylindrical valve seat portion. Examples of a mounting method include a method of fixing the valve portion by pinching the valve portion between the body part and the lid part. Furthermore, a ball valve, which uses a spherical body made of a resin or the like, may also be used. In the ball valve, for example, a cylindrical body having an inner diameter larger than the outer diameter of the spherical body is provided instead of the valve support piece on the body part so as to be concentric with the outside air intake port, and inner diameters of portions near upper and lower openings of the cylindrical body are set to gradually become smaller than the outer diameter of the spherical body so that the spherical body is not separated from the cylindrical body to the outside. The spherical body is generally disposed at a lower portion of the cylindrical body due to gravity. However, the spherical body is moved in the longitudinal direction with an operation for pressing the container body or releasing the pressing of the container body, so that the outside air intake port is smoothly opened and closed. Meanwhile, it is preferable that dimensions of each of the spherical body or the cylindrical body are set in such a manner that the outside air is isolated from the inside of the container body when the spherical body comes into contact with the upper opening in the cylindrical body due to internal pressure through the pressing of the container body. On the other hand, it is preferable that dimensions of each of the spherical body or the cylindrical body are set in such a manner that the outside air is not isolated from the inside of the container body when the spherical body comes into contact with the lower opening in the cylindrical body through the release of the pressing of the container body. 
     In the nozzle cap-equipped discharge container of the invention, the lower surface of the porous member does not necessarily need to be disposed adjacent to the tip supply port of the liquid flow passage and the tip supply ports of the air flow passages, and a gap may be formed between the lower surface of the porous member and the tip supply port of the liquid flow passage and the tip supply port of the air flow passage. If the tip portion of the liquid flow passage and the tip portion of the air flow passages are formed so as to have a positional relationship where the extension line from the tip supply port of the liquid flow passage in the content liquid supply direction and the extension lines from the tip supply ports of the air flow passages in the air supply direction reach the lower surface of the porous member before crossing each other when seen in the lateral direction even when a gas-liquid mixing chamber is interposed between the lower surface of the porous member and the tip supply port of the liquid flow passage and the tip supply port of the air flow passage, this structure is included in the invention. 
     The discharge section, which communicates with the longitudinal discharge flow passage and is provided with the tip-side discharge flow passage including the tip discharge port, does not necessarily need to be the discharge nozzle portion that includes the lateral discharge flow passage as the tip-side discharge flow passage. For example, as illustrated in  FIG. 6 , a discharge section  13 ′ may include a longitudinal flow passage, which is formed so as to communicate with a longitudinal discharge flow passage  16 ′ by using a lid part  12   b ′ and is continued to an upper portion of the longitudinal discharge flow passage  16 ′, as a tip-side discharge flow passage  17 ′ that includes a tip discharge port  13   a ′. That is, the discharge nozzle portion may be formed of the tip-side discharge flow passage  17 ′. Further, a hollow pipe (not illustrated) may be inserted into the tip-side discharge flow passage  17 ′, and the discharge nozzle portion may be formed of the tip-side discharge flow passage  17 ′ and the hollow pipe. It is preferable that the outer diameter of the hollow pipe is substantially equal to the inner diameter of the tip-side discharge flow passage  17 ′. Furthermore, the inner diameter of the hollow pipe may be reduced toward a discharge tip portion, and a whole of the hollow pipe may be formed in an L shape (an elbow shape). 
     Moreover, a whole of the tip-side discharge flow passage does not need to have a two-part structure that includes a body part and a lid part. For example, a part of the tip-side discharge flow passage may be formed of only a lid part, and the tip-side discharge flow passage may be formed of three or more parts through the addition of a separate member. 
     In regards to the respective embodiments having been described above, the invention further discloses the following nozzle cap-equipped discharge container.
     &lt;1&gt; A nozzle cap-equipped discharge container including:   

     a container body that is to contain content liquid; and 
     a nozzle cap that is mounted on a mouth neck section of the container body and includes a discharge section discharging the content liquid fed by the pressurization of the inside of the container body, 
     wherein the nozzle cap includes a longitudinal discharge flow passage that sends upward the content liquid fed from the container body, and a tip-side discharge flow passage that allows the longitudinal discharge flow passage and the discharge section to communicate with each other, and 
     the nozzle cap includes a body part and a lid part, 
     the body part includes the longitudinal discharge flow passage therein, 
     the lid part forms the upper part of a region including a portion directly above the longitudinal discharge flow passage, and 
     the tip-side discharge flow passage includes a flow passage that is formed by the body part and the lid part.
     &lt;2&gt; The nozzle cap-equipped discharge container as set forth in clause &lt;1&gt;,   

     wherein preferably, the discharge section is a discharge nozzle portion that includes a lateral discharge flow passage as the tip-side discharge flow passage.
     &lt;3&gt; The nozzle cap-equipped discharge container as set forth in clause &lt;2&gt;,   

     wherein preferably, the lid part forms the upper part of a portion including a whole of the discharge nozzle portion.
     &lt;4&gt; The nozzle cap-equipped discharge container as set forth in clause &lt;3&gt;,   

     wherein preferably, the lid part is connected to the body part by a hinge joint, and 
     the lid part is rotated about the hinge joint after the lid part is molded integrally with the body part while being opened, so that the lid part is integrally joined to the body part in such a manner that the lid part closes an upper portion of a portion including a whole of the discharge nozzle portion.
     &lt;5&gt; The nozzle cap-equipped discharge container as set forth in any one of clauses &lt;1&gt; to &lt;4&gt;,   

     wherein preferably, the nozzle cap has a function as a squeeze foamer that, with pressing the container body, foams the content liquid while mixing the content liquid with air and discharges the content liquid from the discharge section in the form of foam.
     &lt;6&gt; The nozzle cap-equipped discharge container as set forth in clause &lt;5&gt;,   

     wherein preferably, a porous member for foaming the content liquid is mounted in the longitudinal discharge flow passage, and 
     the porous member is mounted from above the longitudinal discharge flow passage in a state that the lid part and the body part are not integrally joined to each other and the lid part is opened.
     &lt;7&gt; The nozzle cap-equipped discharge container as set forth in any one of clauses &lt;1&gt; to &lt;6&gt;,   

     wherein preferably, an upper end portion of the longitudinal discharge flow passage and a top surface plate of the body part are formed flush with each other.
     &lt;8&gt; The nozzle cap-equipped discharge container as set forth in clause &lt;7&gt;,   

     wherein preferably, the discharge section is formed integrally with the top surface plate so as to protrude from the top surface plate of the body part.
     &lt;9&gt; The nozzle cap-equipped discharge container as set forth in clause &lt;7&gt;,   

     wherein preferably, the discharge section is a discharge nozzle portion that includes a lateral discharge flow passage as the tip-side discharge flow passage.
     &lt;10&gt; The nozzle cap-equipped discharge container as set forth in any one of clauses &lt;6&gt; to &lt;9&gt;,   

     wherein preferably, the lid part is integrally provided with a pressing wall that is disposed in an upper end opening of the longitudinal discharge flow passage of the body part and that is positioned directly above an outer peripheral edge portion of the porous member mounted inside the longitudinal discharge flow passage.
     &lt;11&gt; The nozzle cap-equipped discharge container as set forth in any one of clauses &lt;1&gt; to &lt;10&gt;,   

     wherein preferably, the discharge section is formed of the discharge nozzle portion that includes a lateral discharge flow passage as the tip-side discharge flow passage, and 
     the lid part is integrally provided with a butting wall, which is disposed at an end portion located opposite to a tip discharge port of the lateral discharge flow passage, at a corner where the lateral discharge flow passage and the longitudinal discharge flow passage communicate with each other.
     &lt;12&gt; The nozzle cap-equipped discharge container as set forth in clause &lt;11&gt;,   

     wherein preferably, an inner surface of the butting wall has a curved shape.
     &lt;13&gt; The nozzle cap-equipped discharge container as set forth in clause &lt;11&gt;,   

     wherein preferably, the butting wall has a shape in which a notch or a slit is formed at a part of a side surface of a pipe.
     &lt;14&gt; The nozzle cap-equipped discharge container as set forth in any one of clauses &lt;1&gt; to &lt;13&gt;,   

     wherein preferably, the longitudinal discharge flow passage includes a two-stage cylindrical portion.
     &lt;15&gt; The nozzle cap-equipped discharge container as set forth in clause &lt;14&gt;,   

     wherein preferably, the two-stage cylindrical portion includes a large-diameter cylinder section located on an upper side and a small-diameter cylinder section located on a lower side.
     &lt;16&gt; The nozzle cap-equipped discharge container as set forth in clause &lt;15&gt;,   

     wherein preferably, an upper end portion of a dip tube, which extends to a bottom part of the container body, is mounted on the small-diameter cylinder section of the two-stage cylindrical portion.
     &lt;17&gt; The nozzle cap-equipped discharge container as set forth in clause &lt;15&gt;,   

     wherein preferably, an annular flange is formed at a stepped portion between the large-diameter cylinder section and the small-diameter cylinder section, and 
     a plurality of air holes are formed in the annular flange at intervals in a circumferential direction so as to pass through the annular flange in a longitudinal direction.
     &lt;18&gt; The nozzle cap-equipped discharge container as set forth in any one of clauses &lt;7&gt; to &lt;9&gt;,   

     wherein preferably, the discharge section includes a lower nozzle part that includes the top surface plate of the body part as a bottom surface and includes side walls erected from the top surface plate.
     &lt;19&gt; The nozzle cap-equipped discharge container as set forth in any one of clauses &lt;7&gt; to &lt;9&gt;,   

     wherein preferably, the discharge section includes a lower nozzle part having a shape of which an upper side is opened.
     &lt;20&gt; The nozzle cap-equipped discharge container as set forth in clause &lt;2&gt;,   

     wherein preferably, the discharge nozzle portion including the lateral discharge flow passage is formed in such a manner that a tip discharge port thereof faces downward.
     &lt;21&gt; The nozzle cap-equipped discharge container as set forth in any one of clauses &lt;1&gt; to &lt;20&gt;,   

     wherein preferably, the nozzle cap includes an outside air intake port which is openable by an intake valve mechanism and through which outside air is taken into the container body when negative pressure is generated in the container body, the outside air intake port being opened at an outer peripheral surface of the nozzle cap at a region which is located outside the longitudinal discharge flow passage, 
     the lid part forms the upper part of a portion including the region at which the outside air intake port is opened, and 
     the intake valve mechanism includes a cylindrical valve seat portion that protrudes from an inner surface of the lid part so as to surround the outside air intake port, and a valve portion that is provided on the body part and that may come into close contact with a lower end face of the cylindrical valve seat portion.
     &lt;22&gt; The nozzle cap-equipped discharge container as set forth in clause &lt;21&gt;,   

     wherein preferably, the lid part forms the upper part of a portion that includes the discharge section and the region at which the outside air intake port is opened.
     &lt;23&gt; The nozzle cap-equipped discharge container as set forth in clause &lt;22&gt;,   

     wherein preferably, the lid part is connected to the body part by a hinge joint, and 
     the lid part is rotated about the hinge joint after the lid part is molded integrally with the body part while being opened, so that the lid part is integrally joined to the body part in such a manner that the lid part closes an upper portion of a portion including the discharge section and the region at which the outside air intake port is opened.
     &lt;24&gt; The nozzle cap-equipped discharge container as set forth in any one of clauses &lt;1&gt; to &lt;20&gt;,   

     wherein preferably, an outside air intake chamber is disposed above the top surface plate of the cap body portion of the nozzle cap, 
     the nozzle cap includes the outside air intake port which is openable by an intake valve mechanism provided in the outside air intake chamber and through which outside air is taken into the container body when negative pressure is generated in the container body, the outside air intake port being opened at an upper surface portion of the outside air intake chamber, 
     the intake valve mechanism includes a valve seat portion that is provided on an inner surface of the outside air intake chamber so as to surround the outside air intake port, and a valve portion that may come into close contact with the valve seat portion, 
     the outside air intake chamber includes an annular partition that partitions a periphery of the intake valve mechanism, and 
     an upper end portion of the annular partition is joined to the upper surface portion of the outside air intake chamber and a lower end portion of the annular partition is joined to the top surface plate of the cap body portion, so that the annular partition is provided so as to airtightly partition an outside air-intake flow passage which extends from the outside air intake port to a top plate-outside air intake port, which is opened at the top surface plate.
     &lt;25&gt; The nozzle cap-equipped discharge container as set forth in clause &lt;24&gt;,   

     wherein preferably, the lid part forms the upper part of a portion that includes the outside air intake chamber, 
     the annular partition includes a lid-side annular partition that protrudes from an inner surface of the lid part so as to surround the valve seat portion, and a body-side annular partition that is provided on the body part so as to surround the top plate-outside air intake port and be erected from the top surface plate of the cap body portion, and 
     when the body part and the lid part are integrally joined to each other, a lower end portion of the lid-side annular partition and an upper end portion of the body-side annular partition come into close contact with each other, so that the annular partition is provided so as to airtightly partition the outside air-intake flow passage.
     &lt;26&gt; The nozzle cap-equipped discharge container as set forth in clause &lt;25&gt;,   

     wherein preferably, the lid part forms the upper part of a portion that includes the discharge section and the outside air intake chamber.
     &lt;27&gt; The nozzle cap-equipped discharge container as set forth in clause &lt;26&gt;,   

     wherein preferably, the lid part is connected to the body part by a hinge joint, and 
     the lid part is rotated about the hinge joint after the lid part is molded integrally with the body part while being opened, so that the lid part is integrally joined to the body part in such a manner that the lid part closes an upper portion of a portion including the discharge section and the outside air intake chamber.
     &lt;28&gt; The nozzle cap-equipped discharge container as set forth in any one of clauses &lt;24&gt; to &lt;27&gt;,   

     wherein preferably, the valve seat portion of the intake valve mechanism is the cylindrical valve seat portion that protrudes from an inner surface of the lid part so as to surround the outside air intake port.
     &lt;29&gt; The nozzle cap-equipped discharge container as set forth in any one of clauses &lt;24&gt; to &lt;28&gt;,   

     wherein preferably, the valve portion of the intake valve mechanism is connected to a valve support portion, which is erected from the top surface plate of the cap body portion, in the form of a cantilever so as to be rotatable at a position corresponding to the valve seat portion.
     &lt;30&gt; The nozzle cap-equipped discharge container as set forth in any one of clauses &lt;5&gt; to &lt;29&gt;,   

     wherein preferably, the porous member, which is to foam the content liquid, is mounted inside the longitudinal discharge flow passage that is provided in the nozzle cap and sends the content liquid mixed with air to the discharge section, 
     a tip supply port of a liquid flow passage, to which the content liquid is pumped and supplied from the container body, and a tip supply port of an air flow passage, to which air is pumped and supplied from the container body, are opened at an inner surface of a portion of the longitudinal discharge flow passage that is positioned below the porous member, and 
     when seen in a lateral direction, a tip portion of the liquid flow passage and a tip portion of the air flow passage are formed so as to have a positional relationship where an extension line from the tip supply port of the liquid flow passage in a content liquid supply direction and an extension line from the tip supply port of the air flow passage in an air supply direction reach a lower surface of the porous member before crossing each other.
     &lt;31&gt; The nozzle cap-equipped discharge container as set forth in clause &lt;30&gt;,   

     wherein preferably, the lower surface of the porous member is disposed adjacent to the tip supply port of the liquid flow passage and the tip supply port of the air flow passage.
     &lt;32&gt; The nozzle cap-equipped discharge container as set forth in clause &lt;30&gt; or &lt;31&gt;,   

     wherein preferably, a plurality of the porous members are stacked and mounted inside the longitudinal discharge flow passage, and 
     when seen in the lateral direction, the tip portion of the liquid flow passage and the tip portion of the air flow passage are formed so as to have a positional relationship where the extension line from the tip supply port in the content liquid supply direction and the extension line from the tip supply port in the air supply direction reach a lower surface of the lowermost porous member before crossing each other. 
     Industrial Applicability 
     According to the nozzle cap-equipped discharge container of the invention, the structure of the nozzle cap and a step of assembling the nozzle cap can be further simplified and the container can be formed to be compact through the further reduction of the height of the nozzle cap protruding from the mouth neck section of the container body. 
     According to the nozzle cap-equipped discharge container of the invention, the valve mechanism for opening and closing the outside air intake port can be easily formed by a simple structure and a simple assembling step. 
     According to the nozzle cap-equipped discharge container of the invention, the change of pressure in the container body is allowed to be instantly transmitted to the valve portion to further improve the responsiveness of the valve mechanism including the valve portion so that usability can be improved. 
     According to the nozzle cap-equipped discharge container of the invention, even though a gas-liquid mixing chamber is not particularly formed or a gas-liquid mixing chamber is formed so as to have a small height, it is possible to foam content liquid while mixing the content liquid with air without the deterioration of the quality of foam.