JP7453031B2 - composite lid - Google Patents

Description

The present invention relates to a composite lid for a laminated container, comprising an inner layer for containing the contents and an outer layer surrounding the inner layer.

BACKGROUND OF THE INVENTION In recent years, laminated containers having an inner layer for accommodating contents and an outer layer surrounding the inner layer have been widely used as containers for seasonings, particularly soy sauce. The container lid for such a container includes a lid body including a circular closing wall and a cylindrical mounting wall that hangs down from the outer periphery of the closing wall, and a lid body that is attached to the lower surface of the closing wall of the lid body. A composite lid including an inner plug member and a check valve member combined with the inner plug member has been put into practical use. A discharge opening is formed in the closing wall of the lid body. The lid body is also formed with a suction channel that communicates with the interlayer space between the inner and outer layers of the container. The inner plug member has a communication opening, and the check valve member normally closes the communication opening, but opens the communication opening when the internal pressure of the container increases.

To drain the contents of the container by attaching the composite lid as described above to the mouth and neck of the container, the container is squeezed. When the container is squeezed, the interlayer space between the inner and outer layers of the container is pressurized, the suction path is closed, the internal pressure of the container increases, and the check valve member opens the communication opening. When the communication opening is opened, the contents sequentially pass through the communication opening and the discharge opening and are discharged to the outside. When the compression of the container is released, the container is elastically restored and the interlayer space becomes a negative pressure, and outside air passes through the suction path and is taken into the interlayer space. When sufficient outside air is taken into the interlayer space and the internal pressure of the container returns to atmospheric pressure, the communication opening is closed by the check valve member and the discharge of the contents is stopped.

Patent Document 1 listed below includes a composite lid in which a suction path is defined by a communicating tube extending downward from the lower surface of a blocking wall of a lid main body, and a spherical valve body capable of closing the communicating tube is inserted into the communicating tube. Disclosed. The valve body closes the suction path only when the container is squeezed to pressurize the interlayer space, and does not close the suction path at other times. In the composite lid disclosed in Patent Document 2 below, the inner peripheral surface of the lower end of the mounting wall of the lid body faces the outer peripheral surface of the mouth and neck of the container, and the inner peripheral surface of the mounting wall and the mouth and neck are opposite to each other. A suction path is defined in the annular gap between the outer circumferential surface of the An annular flexible seal piece extending radially inward is formed on the inner peripheral surface of the mounting wall, and the lower surface of this seal piece is the upper surface of the annular protrusion formed on the outer peripheral surface of the mouth and neck of the container. is elastically close to. The seal piece separates from the upper surface of the annular projection formed in the mouth and neck area to open the suction path only when the interlayer space of the container is depressurized, and otherwise closes the suction path. .

Patent No. 5620143 JP 2018-2198 Publication

Therefore, in the composite lid disclosed in Patent Document 1, since the valve body is formed separately from the composite lid, the number of parts increases, and the valve body and the lid body must be individually assembled. Since the process is complicated, a large amount of manufacturing cost is required. In addition, in the composite lid disclosed in Patent Document 2, the sealing piece elastically comes into close contact with the upper surface of the annular projection formed in the mouth and neck except when the interlayer space of the container is depressurized. Since the suction path is closed, for example, when the environmental temperature rises suddenly, such as when a container containing internal medicines is removed from the refrigerator, the inner layer expands and pressurizes the interlayer space of the container. When attempting to discharge the contents, there is a risk that the contents may unexpectedly blow out from the discharge opening.

The present invention has been made in view of the above-mentioned facts, and its main technical problem is to maintain the capacity of the container without increasing the number of parts even when the inner layer of the container expands due to a sudden increase in environmental temperature. It is an object of the present invention to provide a new and improved composite lid in which pressurization of the interlayer space defined between the inner layer and the outer layer is avoided.

As a result of intensive studies, the inventors of the present invention formed a suction hole in the closing wall of the lid body, and formed a suction hole in the inner plug member, which is normally located opposite the suction hole and close to the lower surface of the closing wall. The suction hole is communicated with the interlayer space between the inner layer and the outer layer of the container, and when the interlayer space is pressurized, the suction hole is closed by coming into close contact with the blocking wall, and when the interlayer space is depressurized, the suction hole is communicated with the interlayer space between the inner layer and the outer layer of the container. It has been found that the above main technical problem can be achieved by integrally forming valve pieces that bend in the direction of separation.

That is, according to the present invention, as a composite lid that solves the above-mentioned main technical problem, there is provided a composite lid for a laminated structure container comprising an inner layer for accommodating contents and an outer layer surrounding the inner layer. hand,
a lid body including a circular closing wall and a cylindrical mounting wall hanging from the outer peripheral edge of the closing wall, the closing wall having a discharge opening formed therein;
an inner plug member attached to the lower surface of the closure wall of the lid body and having a communication opening;
a check valve member that is combined with the inner plug member and closes the communication opening under normal conditions but opens the communication opening when the internal pressure of the container increases;
In a composite lid comprising:
A suction hole is formed in the outer peripheral edge of the closing wall of the lid body,
The inner plug member has a flange extending radially outward, and the flange is formed with a communication hole located opposite to the suction hole, and further includes:
The inner plug member is normally located opposite to the suction hole and close to the lower surface of the closing wall to communicate the suction hole with the interlayer space between the inner layer and the outer layer of the container; A valve piece is integrally formed that closes the suction hole by coming into close contact with the closing wall when the interlayer space is pressurized, and bends in a direction away from the closing wall when the interlayer space is depressurized, The valve piece is located within the communication hole, and a part of the outer peripheral edge is locally connected to a part of the inner peripheral edge of the communication hole .
A composite lid is provided.

Preferably , the flange of the inner plug member has an annular shape and is formed with at least one notch, and a protrusion corresponding to the notch is formed on the lower surface of the closing wall, and the protrusion It is preferable that the relative angular position of the inner plug member with respect to the closing wall be regulated by being located within the notch.

In the composite lid of the present invention, the valve piece is normally located opposite the suction hole and close to the lower surface of the closing wall, and communicates the suction hole with the interlayer space between the inner layer and the outer layer of the container. Therefore, even if the internal layer expands due to a sudden increase in the environmental temperature, the air in the interlayer space can be released to the outside through the suction hole, thereby avoiding pressurization of the interlayer space. be done. Furthermore, since the valve piece is integrally formed with the inner plug member, there is no increase in the number of parts.

FIG. 2 is a cross-sectional view of the preferred embodiment of the composite lid constructed according to the present invention when the outer lid is in the closed position. FIG. 2 is a cross-sectional view of the preferred embodiment of the composite lid constructed according to the present invention when the outer lid is in the open position. The bottom view of the lid main body in the composite lid shown in FIG. 1-1. 1-1 is a sectional view taken along line AA of the lid main body in the composite lid shown in FIG. 1-1. FIG. 2 is a plan view of a lid main body in the composite lid shown in FIG. 1-1. FIG. 2 is a bottom view of the inner plug member in the composite lid shown in FIG. 1-1. FIG. 2 is a plan view of the check valve member in the composite lid shown in FIG. 1-1. FIG. 2 is a front view of the check valve member in the composite lid shown in FIG. 1-1. FIG. 2 is a bottom view of the check valve member in the composite lid shown in FIG. 1-1. 1-1 is an enlarged cross-sectional view showing a portion where a valve piece is formed in the composite lid shown in FIG. 1-1. FIG.

Hereinafter, preferred embodiments of the composite lid constructed according to the present invention will be described in further detail with reference to the accompanying drawings. Unless otherwise specified, the terms "upper" and "lower" as used in this specification and claims refer to the state shown in FIG. state) means above and below.

Referring to FIG. 1-1, the composite lid, generally designated by the number 2, includes a lid main body 4, an inner plug member 6, and a check valve member 8. The lid body 4 is formed by injection molding from a suitable synthetic resin such as polyethylene or polypropylene, and includes a circular closing wall 10 and a cylindrical mounting wall 12 depending from the outer peripheral edge of the closing wall 10. A circular discharge opening 13 is formed in the center of the closing wall 10, and a discharge tube 14 is formed on the upper surface of the closing wall 10 so as to surround the outer periphery of the discharge opening 13 and extend upward. The main part of the ejection tube 14 has a substantially cylindrical shape, and the length of the ejection tube 14 extending from the base end is longer than the side on which a hinge portion (to be described later) is formed (in other words, in FIG. 1-1). The right side of the figure is lower than the left side. A lip having a substantially semicircular vertical cross section is provided at the upper end of the discharge tube 14 on the side where the hinge portion described above is not formed. An annular protrusion 16 that protrudes radially inward is formed on the inner peripheral surface of the vertically intermediate portion of the discharge tube 14 . The upper surface of the protrusion 16 has an inverted truncated conical shape that slopes downward toward the inside in the radial direction, the inner peripheral surface has a cylindrical shape that is substantially vertical in the vertical direction, and the lower surface has a substantially horizontal annular shape. . A substantially cylindrical locking wall 18 is formed at the outer peripheral edge of the upper surface of the closing wall 10 . An annular locking protrusion 20 is formed at the upper end of the outer peripheral surface of the locking wall 18 and projects radially outward. A suction hole 22 is formed in the outer peripheral edge of the closing wall 10 and penetrates in the vertical direction. In the illustrated embodiment, the suction hole 22 has a circular cross section (see also FIGS. 2 and 4) , and is formed at a position between the discharge opening 13 and a hinge portion described below in plan view. . A cylindrical suction cylinder wall 24 that surrounds the outer peripheral edge of the suction hole 22 and extends upward is formed on the upper surface of the closing wall 10 . A cylindrical engagement wall 26 extending downward is formed at a radially intermediate portion of the lower surface of the closure wall 10 . An annular engagement protrusion 28 is formed at the lower end of the engagement wall 26 and projects radially inward. Referring to FIGS. 2 and 3 together with FIG. 1-1, a rectangular parallelepiped-shaped protrusion 30 that protrudes downward is provided on the lower surface of the closing wall 10 on the radially outer side of the engagement wall 26. Two are formed facing each other. The protrusion 30 corresponds to a notch formed in the inner plug member 6, which will be described later. An annular shoulder 32 that projects downward is also formed at the outer peripheral edge of the lower surface of the closing wall 10 . The outer peripheral surface of the shoulder portion 32 is also connected to the inner peripheral surface of the mounting wall 12. The lower surface of shoulder 32 abuts the upper surface of the outer layer of the container, which will be described below.

Referring to FIGS. 2 to 4 together with FIG. 1-1, at the lower end of the inner circumferential surface of the mounting wall 12, there is a fitted protrusion 34 that protrudes radially inward and extends in an arc shape in the circumferential direction. There are two formed at intervals in the circumferential direction. A cylindrical separation groove 36 whose upper end is open is formed in the mounting wall 12 . Due to the presence of the separation groove 36 and the like, the composite lid 2 can be removed from the mouth and neck of the container, which will be described later, after the contents have been discharged, and the container and the composite lid 2 can be disposed of separately. Can be done. For details of the separation mechanism of the mounting wall 12 including such a separation groove 36, please refer to Japanese Patent Application Laid-Open No. 2007-22567, which was filed and published prior to the present application by the applicant of the present application.

An outer lid 40 is connected to the upper end of the mounting wall 12 of the lid body 4 via a hinge means 38. The outer lid 40 is formed integrally with the lid main body 4 (therefore, the outer lid 40 is also made of synthetic resin), and has two positions: the closed position of the lid main body 4 covering the closing wall 10 (the state shown in FIG. It can be freely rotated between the open position (the state shown in Figures 1-2) and the exposed position. The outer lid 40 has a top wall 42 and a skirt wall 44 that hangs down from the outer peripheral edge of the top wall 42. At the center of the lower surface of the top wall 42, a solid rod-shaped plug 46 is formed that extends downward. The cross section of the occluding plug 46 is circular, and the proximal end 46a of the occluding plug 46 has a larger outer diameter than the distal end 46b, and there is an inverted conical section between the proximal end 46a and the distal end 46b. A trapezoidal intermediate portion 46c is formed. When the outer cover 40 is in the closed position, the closure plug 46 is inserted into the inside of the discharge tube 14 formed in the closure wall 10, and the proximal end side 46a of the closure plug 46 is inserted, as shown in FIG. 1-1. The outer circumferential surface is in close contact with the inner circumferential surface of the protrusion 16 of the discharge tube 14. A substantially cylindrical hanging wall 48 that hangs downward from the lower surface of the top wall 42 is formed on the outer periphery of the proximal end of the plug 46 . When the outer lid 40 is in the closed position, the hanging wall 48 surrounds the outer peripheral edge of the upper end of the discharge tube 14 and is located somewhat outside of this. A double annular groove 50 is also formed on the inner peripheral edge of the hanging wall 48 to prevent the content liquid adhering to the lower surface of the top wall 42 from scattering when the outer lid 40 is turned from the closed position to the open position. ing. A support wall 52 that hangs downward is formed at a radially intermediate portion of the lower surface of the top wall 42 . Referring to FIG. 4 in conjunction with FIG. 1-1, the support wall 52 has an overall cylindrical shape, but has two diametrically opposed cutouts 54a and 54b formed at its lower end. The notch 54a is relatively large in both the circumferential direction and the vertical direction, and prevents the support wall 52 from interfering with the suction cylinder wall 24 formed on the closing wall 10 when the outer lid 40 is in the closed position. On the other hand, the notch 54b is relatively small in both the circumferential direction and the vertical direction. When the outer cover 40 is in the closed position, the support wall 52 comes into contact with the upper surface of the closing wall 10 except for the portion where the cutouts 54a and 54b are formed, and is moved by an external force applied to the upper surface of the top wall 42. This prevents the top wall 42 from deforming downward. An annular locking protrusion 56 is formed at the lower end of the inner peripheral surface of the skirt wall 44 . A flange 58 is formed at the lower end of the outer peripheral surface of the skirt wall 44 on the diametrically opposite side of the hinge means 38, on which a finger can be placed when the outer lid 40 is pivoted.

Next, the inner plug member 6 will be explained with reference to FIG. 5 together with FIG. 1-1. The inner plug member 6 is attached to the lower surface of the closing wall 10 of the lid body 4, and is formed by injection molding from a suitable synthetic resin such as polyethylene or polypropylene. The inner plug member 6 includes a communication wall 60 that is circular in bottom view (and plan view), and a cylindrical seal wall 62 that extends upward from the outer peripheral edge of the communication wall 60. A cylindrical engaged wall 64 extending upward is formed at the radially intermediate portion of the communication wall 60, and an annular engaged protrusion 66 that protrudes outward is formed on the outer peripheral surface of the upper end of the engaged wall 64. It is formed. The inner plug member 6 is attached to the lower surface of the closing wall 10 of the lid main body 4 by the engaged projection 66 engaging with the engaging projection 28 formed on the lower surface of the closing wall 10 of the lid main body 4. Ru. The inner circumferential surface of the engaged wall 64 at approximately the midpoint in the vertical direction is provided with an annular center that is gently inclined downward toward the inside in the radial direction, then sharply bent downward, and then extends substantially horizontally. A wall portion 68 is formed, and a circular communication opening 70 is formed inside the central wall portion 68.

An annular flange 72 extending radially outward is formed at the upper end of the sealing wall 62, and at least one notch 74 is formed in the flange 72. In the illustrated embodiment, three notches 74 are formed at angular intervals of 90 degrees in the circumferential direction, and are open radially outward and in the vertical direction. When assembling the inner plug member 6 and the lid main body 4, by positioning the protrusion 30 formed on the lower surface of the closing wall 10 of the lid main body 4 in the notch 74, the relative position of the inner plug member 6 with respect to the closing wall 10 is adjusted. The target angle position is regulated. A communication hole 76 is formed in the flange 72 so as to face the suction hole 22 formed in the closing wall 10 of the lid main body 4 . In the illustrated embodiment, the communication hole 76 is located diametrically opposite to the notches 74 other than the two notches 74 that are diametrically opposed to each other in FIG. 5 . The communication hole 76 is circular in bottom view (plan view) and penetrates in the vertical direction. Here, in the composite lid of the present invention, the inner plug member 6 is normally located opposite to the suction hole 22 and close to the lower surface of the closing wall 10, so that the suction hole 22 is located inside the container 100. The suction hole 22 is communicated with the interlayer space 106 between the layer 102 and the outer layer 104, and when the interlayer space 106 is pressurized, the suction hole 22 is closed in close contact with the closing wall 10, and when the interlayer space 106 is depressurized, the closing wall 10 is closed. It is important that the valve piece 78 that bends in the direction away from the valve piece 78 is integrally formed . In the illustrated embodiment, the valve piece 78 has a substantially disk shape , is located within the communication hole 76, and has a portion of its outer periphery locally connected to a portion of its inner periphery within the communication hole 76. There is. Therefore, since the valve piece 78 is located inside the flange 72, it is avoided that an unexpected external force is applied to the valve piece 78 when, for example, the inner plug member 6 is transported alone. Damage or separation from the inner peripheral edge of the communication hole 76 is prevented. Here, as can be clearly understood by referring to FIG. 9(a) together with FIGS. 1-1 and 5, the valve piece 78 is provided at a position slightly below the upper end of the communication hole 76. The operation of the valve piece 78 will be further discussed later. A protrusion 80 that protrudes downward is formed continuously in the circumferential direction on the inner peripheral edge of the lower surface of the flange 72 . The lower surface of the protrusion 80 abuts the upper surface of an upper flange formed on the inner layer of the container, as described below.

Next, the check valve member 8 will be explained with reference to FIGS. 6 to 8 together with FIG. 1-1. The check valve member 8 is combined with the inner stopper member 6 and arranged on the lower surface of the closing wall 10 of the lid body 4. The check valve member 8 is formed by injection molding of relatively soft synthetic resin such as polyethylene, rubber, elastomer, silicone, etc., and includes a support ring 82. The support ring 82 has three arc-shaped hanging pieces 84 that hang downward and are spaced at equal angular intervals in the circumferential direction. A band-shaped connecting piece 86 is formed at the lower end of the inner circumferential surface of each hanging piece 84 and extends downwardly in a clockwise direction in FIG. 8 (in a counterclockwise direction in FIG. 6). There is. Further, a valve body 88 is provided inside the support ring 82 in plan view and bottom view and at a position below this when viewed in the vertical direction. The tip of the connecting piece 86 is connected to the outer peripheral surface of the valve body 88, and the valve body 88 is supported by the connecting piece 86 in a vertically movable state. The valve body 88 is circular in plan view and bottom view, and a seal portion 90 in the shape of an inverted truncated cone is provided at the lower end. The upper surface of the valve body 88 is substantially horizontal, but a dome-shaped cavity 92 is formed in the lower surface.

As shown in FIG. 1-1, the check valve member 8 is assembled with the lid body 4 together with the inner plug member 6 while being placed on the upper surface of the center wall portion 68 of the inner plug member 6. When the inner plug member 6 and the check valve member 8 are assembled with the lid body 4, the seal portion 90 of the valve body 88 of the check valve member 8 is in contact with the center wall portion 68 of the inner plug member 6. The upper surface of the support ring 82 comes into contact with the lower surface of the closing wall 10 while making contact with the upper surface of the inner peripheral edge. At this time, the valve body 88 rises somewhat relative to the support ring 82 from the state shown in FIG. (The upper surface of the support ring 82 and the lower surface of the closing wall 10 also come into close contact with each other). Thereby, the check valve member 8 closes the communication opening 70 of the inner plug member 6. Further, when the outer lid 40 is in the closed position, the tip of the blocking plug 46 comes into contact with the upper surface of the valve body 88 and presses it downward, as shown in FIG. 1-1.

In FIG. 1-1, the mouth and neck portion of the container 100 to which the composite lid 2 is attached is also shown with a chain double-dashed line. The container 100 is a laminated structure container including an inner layer 102 for containing contents and an outer layer 104 surrounding the inner layer 102, and an interlayer space 106 is defined between the inner layer 102 and the outer layer 104. The container 100 is constructed by inserting and holding a base material (inner preform) for forming the inner layer 102 inside the base material (outer preform) for forming the outer layer 104, and then inserting and holding the base material (inner preform) for forming the inner layer 102 inside the outer preform. It is formed by stretching and blowing the inner preform at the same time. The method of forming such a container 100 is well known, and for details, please refer to, for example, Japanese Patent Application Publication No. 2018-62146. The material for the inner layer 102 and the outer layer 104 is preferably a thermoplastic resin that can be blow molded, such as polyester such as polyethylene terephthalate, or polyolefin such as polyethylene or polypropylene.

The mouth and neck of the container 100 has a cylindrical shape. In other words, the upper ends of the inner layer 102 and the outer layer 104 have a cylindrical shape. An annular fitting protrusion 108 is formed on the outer circumferential surface of the upper end of the outer layer 104 and protrudes outward in the radial direction. The composite lid 2 is attached to the mouth and neck of the container 100 by fitting with the fitted protrusion 34. A well-known support ring 110 is also formed below the fitting protrusion 108, which is used when transporting the container. An annular shoulder surface 112 facing upward is formed on the inner circumferential surface of the upper end of the outer layer 104 . At the upper end of the inner layer 102, an upper flange 114 and a lower flange 116, both of which have an annular shape, are formed at intervals in the vertical direction. The outer peripheral edge of the lower surface of the lower flange 116 contacts the shoulder surface 112 formed on the inner peripheral surface of the outer layer 104, so that the outer layer 104 is supported in the vertical direction by the inner layer 102. Further, the outer peripheral surfaces of the upper flange 114 and the lower flange 116 both face the inner peripheral surface of the outer layer 104, thereby preventing the inner layer 102 from tilting relative to the outer layer 104. A plurality of notches 118 are formed in the upper flange 114 and the lower flange 116 at intervals in the circumferential direction, and the interlayer space 106 communicates with the outside of the container 100 via the notches 118.

When attaching the composite lid 2 to a container 100 whose inner layer 6 is filled with a liquid content such as soy sauce, the mounting wall 12 of the composite lid 2 is fitted onto the mouth and neck of the container 100, and the composite lid 2 is is forced downward relative to the container 100. In the composite lid 2, the mating protrusion 34 formed on the inner circumferential surface of the mounting wall 12 elastically rides over the mating protrusion 108 formed on the outer circumferential surface of the mouth and neck of the container 100. By being fitted, the container 100 is attached to the mouth and neck. When the composite lid 2 is attached to the mouth and neck of the container 100, the sealing wall 62 of the inner plug member 6 enters the inside of the inner layer 102 of the container 100, more specifically, the inside of the inner layer 102, and radially closes the inside of the inner layer 102. elastically outwardly (in other words, the sealing wall 62 is pressed inside the inner layer 102). As a result, the outer peripheral surface of the seal wall 62 comes into close contact with the upper end of the inner peripheral surface of the inner layer 102, and the contents pass through the outside of the seal wall 62 and flow out of the inner layer 102 (i.e., the container 100). is prevented. Furthermore, the lower surface of the shoulder 32 formed on the lower surface of the closing wall 10 of the lid body 4 comes into contact with the upper surface of the outer layer 104, and the lower surface of the protrusion 80 formed on the lower surface of the flange 72 of the inner plug member 6 comes into contact with the upper surface of the outer layer 104. The lower end of the communication hole 76 that contacts the upper surface of the upper flange 114 of the inner layer 102 and is formed in the flange 72 of the inner plug member 6 is prevented from being blocked by the upper surface of the upper flange 114 of the inner layer 102.

Here, in the composite lid 2 of the present invention, the valve piece 78 is normally located opposite the suction hole 22 and close to the lower surface of the closing wall 10, so that the suction hole 22 is connected to the inner layer 102 and the outer layer of the container 100. 104, so if the environmental temperature suddenly increases and the inner layer 102 expands, for example when the container 100 with the composite lid 2 attached is taken out of the refrigerator, As shown by the arrow in FIG. 9(a), the air in the interlayer space 106 can be discharged to the outside through the suction hole 22, thereby preventing the interlayer space 106 from being pressurized. Further, since the valve piece 78 is integrally formed with the inner plug member 6, there is no increase in the number of parts. This prevents the contents from unexpectedly blowing out from the discharge opening 13 when the outer lid 40 is pivoted to the open position as described later.

When consuming the contents of the container, first put your finger on the flange 58 of the outer lid 40 to force the outer lid 40 upward, and then move the locking protrusion 56 of the outer lid 40 onto the lid body 4. It is elastically disengaged from the locking protrusion 20 and the outer cover 40 is pivoted toward the open position shown in FIGS. 1-2. The closing wall 10 is thus exposed. Thereafter, the container 100 is squeezed by gripping the side surface of the container 100 and tilting it appropriately. When the container 100 is squeezed, the interlayer space 106 is pressurized, and as shown in FIG. 9(b), the valve piece 78 formed on the inner plug member 6 is moved counterclockwise around the base end in the figure. It rotates and bends to close the suction hole 22 in close contact with the closing wall 10 of the lid body 4. This restricts the air in the interlayer space 106 from passing through the suction hole 22 and flowing out to the outside, and by further squeezing the container 100, the inner layer 102 is pressurized. When the pressure inside the inner layer 102 becomes greater than the pressure outside the container 100 by a predetermined value or more, the valve body 88 of the check valve member 8 is moved upward against the elastic force of the connection piece 86, The seal portion 90 of the valve body 88 is separated from the upper surface of the inner peripheral edge of the central wall portion 68 of the communication wall 60 in the inner plug member 6, and the communication opening 70 of the inner plug member 6 is opened. At this time, due to the cavity 92 being formed on the lower surface of the valve body 88, the force that tends to move the valve body 88 upward due to the pressure within the inner layer 102 is applied to the lower surface of the valve body 88. The valve body 88 is moved upwards smoothly. When the communication opening 70 is opened, the contents filled in the inner layer 102 are discharged from the discharge tube 14 after passing through the communication opening 70 and the discharge opening 13 in sequence.

When stopping the discharge of the contents, the squeeze on the side of the container 100 is released. As the compression of the side surface of the container 100 is released, the increase in the internal pressure of the container is released, and the valve element 88 of the check valve member 8 is thereby moved downward by the above-mentioned restoring force of the connecting piece 86, and the sealing portion 90 comes into close contact with the upper surface or inner peripheral surface of the inner peripheral edge of the central wall portion 68 of the communication wall 60, and the communication opening 70 is closed. Therefore, the evacuation of the contents is stopped and the inner layer 102 is sealed. When the side surface of the container 100 is unsqueezed, the outer layer 104 restores itself due to its own elastic force, that is, expands from the squeezed state to the state before being squeezed, and as a result, the outer layer 104 and the inner layer 102 The interlayer space 106 between the two becomes negative pressure (the interlayer space 106 is depressurized). Then, as shown in FIG. 9(c), the valve piece 78 formed on the inner plug member 6 moves in the direction away from the closing wall 10 of the lid body 4, that is, in the same figure, the valve piece 78 moves clockwise around its base end. The interlayer space 106 takes in outside air from the suction hole 22 as shown by the arrow in the figure. When sufficient outside air is taken into the interlayer space 106 and the negative pressure state of the interlayer space 106 is released, that is, when the interlayer space 106 becomes equal to atmospheric pressure, the valve piece 78 changes from the state shown in FIG. 9(c) to the state shown in FIG. The state returns to the state shown in (a). At this time, sufficient outside air is taken into the interlayer space 106, so that the inner layer 102 is maintained in a state where the sides of the container 100 are compressed. In the illustrated embodiment, a suction cylinder wall 24 that surrounds the outer periphery of the suction hole 22 and extends upward is formed on the upper surface of the closing wall 10, so that the inside discharged from the discharge cylinder 14 is Even if a part of the object remains on the upper surface of the closing wall 10, the remaining contents are prevented from entering the suction hole 22.

2: Composite lid 4: Lid body 6: Inner plug member 8: Check valve member 10: Closure wall 12: Mounting wall 13: Discharge opening 22: Suction hole 70: Communication opening 78: Valve piece 100: Container 102: Inner layer 104: Outer layer 106: Interlayer space

Claims (2)

A composite lid for a laminated container comprising an inner layer for containing contents and an outer layer surrounding the inner layer, the lid comprising:
a lid body including a circular closing wall and a cylindrical mounting wall hanging from the outer peripheral edge of the closing wall, the closing wall having a discharge opening formed therein;
an inner plug member attached to the lower surface of the closure wall of the lid body and having a communication opening;
a check valve member that is combined with the inner plug member and closes the communication opening under normal conditions but opens the communication opening when the internal pressure of the container increases;
In a composite lid comprising:
A suction hole is formed in the outer peripheral edge of the closing wall of the lid body,
The inner plug member has a flange extending radially outward, and the flange is formed with a communication hole located opposite to the suction hole, and further includes:
The inner plug member is normally located opposite to the suction hole and close to the lower surface of the closing wall to communicate the suction hole with the interlayer space between the inner layer and the outer layer of the container; A valve piece is integrally formed that closes the suction hole by coming into close contact with the closing wall when the interlayer space is pressurized, and bends in a direction away from the closing wall when the interlayer space is depressurized, The valve piece is located within the communication hole, and a part of the outer peripheral edge is locally connected to a part of the inner peripheral edge of the communication hole .
A composite lid characterized by: The flange of the inner plug member has an annular shape and is formed with at least one notch, and a protrusion corresponding to the notch is formed on the lower surface of the closing wall, and the protrusion is inserted into the notch. 2. The composite lid according to claim 1 , wherein the relative angular position of the inner plug member with respect to the closure wall is regulated by being positioned at .