JP7508043B2 - valve - Google Patents

Description

The present invention relates to a valve that opens and closes in response to pressure applied from the container body side.

One example of a conventional valve is one that has a resin valve body with a polygonal outer periphery that can be opened and closed in response to pressure applied from the container body, and a flange that extends from the entire outer periphery of the valve body (Patent Document 1). This valve can be formed by injection molding so that it is in the open state.

The valve body also includes a group of elastically deformable valve pieces that extend from each side of a polygonal shape. All of the valve pieces have a valve body that tapers from each side toward the tip, and the tip side of the valve piece has a triangular shape when viewed from the opposite side to the container body.

JP 2018-127234 A

In the above-mentioned valve, when closed, the tips of all the valve pieces are gathered at one point, as shown by the dashed line in Fig. 13, and the center is completely sealed. When gathered at one point like this, the tips of the valve pieces are formed into an acute-angled triangle, and although it is possible to form them by injection molding, it is hard to say that this is practical from the standpoint of durability and mold cost. In practice, the best that can be done is to make the tip of the valve piece 31 into an arc shape, as shown by the solid line in Fig. 13.
More specifically, it is as follows. If the recess in the mold is formed with an end mill, a cutting tool, the diameter of the end mill determines the shape of the recess, so the recess corresponding to the tip of the valve piece will have an arc shape corresponding to the diameter of the end mill, and it is impossible to form it into an acute triangle. Even with electric discharge machining, it is similarly impossible because the machining accuracy determines the shape of the recess.
On the other hand, if it is acceptable to use more parts than when making a mold by cutting or electric discharge machining, it is possible to combine those parts and form a recess in the mold to make the tip of the valve piece into an acute triangle as mentioned above. However, an increase in the number of parts leads to a decrease in the durability of the mold and an increase in the cost of the mold.
Therefore, when a valve is produced using a practical injection molding die, even if the tips of all the valve pieces 31 are brought together when the valve is closed, an unsealed area is formed in the center.

The present invention was created in consideration of the above circumstances, and its purpose is to provide a valve that is suitable for production in an injection molding die and that has as small an unsealed area as possible when in the closed state.

The valve of the present invention comprises a resin valve body having a polygonal outer periphery that can be opened and closed in response to pressure applied from the container body, and a flange that extends from the outer periphery of the valve body. The valve body comprises a group of elastically deformable valve pieces that are a collection of valve pieces extending from each side of the polygonal shape. The above is the premise of the present invention.
In addition, when viewed from the opposite side to the container body, all of the valve pieces have a valve piece main body portion that tapers from each side portion toward the tip, and a smaller number of the valve pieces have, in addition to the valve piece main body portion, a bulge portion that bulges outward relative to at least one of two extension lines extending from the two tapered side edges of the valve piece main body portion toward the intersection point.
When viewed from the opposite side to the container body, when the valve body is closed, the tips of all the valve piece body parts come together to form a notional unsealed area surrounded by all the gathered valve piece body parts, and an actual unsealed area is formed by placing an enlarged portion in the notional unsealed area.

The larger the tip of the valve piece body is, the easier it is to produce an injection molding die, and it is desirable to do so as follows.
That is, when viewed from the opposite side to the container body, the bulging portion bulges outward relative to the two extension lines of the valve piece body portion.

When viewed from the opposite side to the container body, the valve piece main body has a shape that tapers from each side toward the tip, and the two side edges may be straight or curved, but it is preferable that they be as follows.
That is, when viewed from the opposite side to the container body, the shape of the tip of the valve piece main body is a shape having two side edges that extend just before reaching the apex of the three sides forming a triangle.

As long as the outer periphery of the valve body is polygonal, the number of corners does not matter, but it is preferable that the valve body has the following:
In other words, the outer periphery of the valve body is a polygonal shape with an even number of sides greater than or equal to a square, and valve pieces whose tip portions are formed by enlarged portions and valve pieces whose tip portions are formed by valve piece main body portions are arranged alternately in the circumferential direction.

Furthermore, the conceptual unsealed area does not matter what relationship the boundary between the valve piece main body portion of the valve piece including the bulge portion and the bulge portion should have to the polygonal shape of the outer periphery of the valve body, but it is preferable that it be as follows.
That is, the conceptual unsealed region has one side of a polygonal shape similar in shape to the outer periphery of the valve body as the boundary line between the valve piece main body portion of the valve piece including the swollen portion and the swollen portion.

As a specific configuration of the valve piece, the following example is preferable.
That is, the valve piece is provided with a first plate, a first hinge, a second plate, and a second hinge in the order from the tip to the side. The first and second hinges serve as fulcrums for displacing the tip side of each of them more than themselves. When the second plate group, which is a collection of all the second plate parts, is pressed from the side opposite the container body, the valve body is in a closed state, and the first plate parts of the first plate group, which is a collection of all the first plate parts, are adjacent in the circumferential direction, so that when pressure is applied from the container body side to the valve body in the closed state, the first plate part can be displaced to the side opposite the container body with the first hinge part as a fulcrum.

The valve of the present invention has an expanded portion disposed in the conceptual unsealed area, so that the actual unsealed area is narrower than the conceptual unsealed area, and since there is an expanded portion at the tip of the valve piece, the tip of the valve piece is more suitable for production using an injection molding die than, for example, when the tip of the valve piece is triangular.

FIG. 2 is a plan view showing a closed state of the valve of the first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line II-II of FIG. 13(a) and 13(b) are explanatory diagrams for understanding the shape of the valve. FIG. 2 is a plan view showing the valve of the first embodiment of the present invention immediately after molding. FIG. 5 is a front view of the valve shown in FIG. FIG. 5 is a bottom view of the valve shown in FIG. FIG. 5 is a side view of the valve shown in FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 4. IX-IX line cross-sectional view of FIG. 4. FIG. 5 is a perspective view of the valve shown in FIG. FIG. 2 is a cross-sectional view showing the container in a closed state. FIG. 13 is an explanatory diagram showing the state in which the contents are being removed from the container. FIG. 1 is an explanatory diagram showing a closed state of a valve formed according to a conventional concept.

As shown in Figure 11, the valve 1 of the first embodiment of the present invention constitutes a part of a container. The container comprises a container body B, a sealant S that seals the mouth B2 of the container body B, a cap 5 that is attached to the container body B and can be opened and closed, and a valve 1 that is attached inside the cap 5 on the opposite side of the sealant S from the container body B.

11 and 12, the container body B has a hollow body B1 and a tubular mouth B2 protruding from a part of the body B1. In this embodiment, the outer circumferential surface of the mouth B2 is a cylindrical surface, and a male screw B3 for attaching the cap 5 is formed on the body B1 side. It is desirable that the container body B be filled with a viscous material as the content. One example of the viscous material is mayonnaise.
In this embodiment, the container body B includes an outer bag B5 having a restorable elasticity, and an inner bag B6 including an oxygen barrier layer having a better oxygen barrier performance (less permeable to oxygen) than the outer bag B5. An introduction hole B7 for introducing air between the outer bag B5 and the inner bag B6 is formed in the thickness direction of the outer bag B5. When the contents are filled, the outer bag B5 and the inner bag B6 overlap, and when the outer bag B5 is restored due to its elasticity after the contents are discharged, the inner bag B6 contracts at the body B1 while maintaining a state in which the outer bag B5 and the inner bag B6 are partially in close contact with each other, resulting in a state in which air is trapped between the inner bag B6 and the outer bag B5.

In the following, the center of the mouth B2 when viewed from the opposite side to the container body B, and the straight line extending in the direction in which the contents pass through this center, is referred to as the axis L. In this embodiment, the directions in which the contents pass through the mouth B2, the valve 1, and the cap 5 are the same. The mouth diameter direction refers to the extension direction of a straight line passing through the center on a plane perpendicular to the axis L, with the intersection with the axis L as the center. Incidentally, in this embodiment, the mouth B2 has cylindrical inner and outer circumferential surfaces, so the mouth diameter direction coincides with the radial direction.
In the case of an annular object centered on the axis L, the side closer to the axis L in the diameter direction may be called the inside or inner circumferential side, and the side farther from the axis L may be called the outside or outer circumferential side.

In this embodiment, the sealing material S comprises a passage seal S1 that is adhered to the end surface of the mouth B2 of the container body B and allows the contents to pass through, and a sealing seal S2 that is peelably adhered to the surface of the passage seal S1 and seals the mouth B2 of the container body B.

The passage seal S1 is annular, and its annular outer periphery is adhered to the end face of the mouth B2 of the container body B. The annular inner periphery of the passage seal S1 forms the passage opening S4. The passage opening S4 is closed when the sealing seal S2 is adhered to the passage seal S1 as shown in FIG. 11, and allows the contents to pass when the sealing seal S2 is peeled off as shown in FIG. 12.

The valve 1 and cap 5 are made of resin, more specifically, hard resin such as polypropylene or polyethylene. Hard resin excludes soft resins such as elastomers and silicone. It is desirable for the valve 1 to be made of hard resin in order to allow elastic deformation in which a specific part acts as a fulcrum and displaces other parts.

In the following description, the state of the valve 1 will be described as follows.
The state in which the valve 1 is closed is called the closed state, and the state in which the valve 1 is open is called the open state. The state in which no pressure is applied to the valve 1 from the outside is called the normal state.

As shown in FIG. 10, the valve 1 comprises an annular flange 2 and a valve body 3 that is joined to the inner circumference of the flange 2 and can open and close its inside relative to the flange 2.

As shown in Figures 2 and 8, the flange 2 is flat and annular, and includes a flange body 21 that covers the tip surface of the mouth B2 of the container body B, and a flange insertion part 22 that protrudes from the outer periphery of the flange body 21 toward the opposite side to the container body B and is inserted into the cap 5 for attachment.

The flange insertion portion 22 is tubular, more specifically cylindrical, and is centered on the axis L. The outer peripheral surface of the flange insertion portion 22 is tapered such that the outer diameter decreases toward the side opposite the container body B.

The flange body portion 21 protrudes in a flange-like shape from the entire outer periphery of the valve body 3 toward the outside in the diameter direction, and as shown in Figures 1 and 4, when viewed from the opposite side to the container body B, its outer periphery is circular and its inner periphery is polygonal.

A polygonal shape is one that has a polygon as its basic shape. However, a polygonal shape does not only mean a pure polygonal shape, but also includes cases where the sides of the polygon are non-linear, for example, wavy, or the corners of the polygon are rounded off, so-called chamfered, as in the illustrated example, and it is sufficient if it is recognized as a polygon in appearance. A polygon is a polygon in which all interior angles are less than 180 degrees, a so-called convex polygon, and preferably a polygon in which all interior angles are greater than a right angle and less than 180 degrees. Incidentally, when a polygonal shape has corners chamfered, the angles of the interior angles of the polygon are determined assuming a polygon with unchamfered corners. The polygon is preferably a regular polygon. In this embodiment, the inner circumference of the flange body 21 is an even-numbered regular polygon, more specifically, a regular hexagon, and has six sides 21a. Incidentally, the thickness of the inner circumference of the flange body 21 gradually decreases toward the inside in the diameter direction.

The valve body 3 is joined to the inner circumference of the flange 2, so that its outer circumference has the same polygonal shape as the inner circumference of the flange 2. The valve body 3 also has the same number of valve pieces 31 as the number of sides of the polygonal shape of the flange 2. The valve body 3 is composed of a group of valve pieces 31, 31, ... which is a collection of valve pieces 31, and in the closed state, it has a convex shape that bulges out toward the opposite side to the container body B, more specifically, it is hollow and semispherical, and the bottom side of the hemisphere opens toward the container body B.

The valve piece 31 is elastically deformable and extends from each side 21a of the polygonal shape that is the inner circumference of the flange 2. In addition, in the closed state, the valve piece 31 protrudes from each side 21a toward the hemispherical top while bending three-dimensionally. More specifically, the valve piece 31 protrudes in an arc shape from each side 21a of the regular polygonal shape toward the axis L while bulging toward the opposite side of the container body B. In addition, when the valve piece 31 is stretched out straight, it is approximately triangular when viewed from the opposite side of the container body B, and more specifically, it is shaped by joining a rectangle having each side 21a as one side and an approximately triangle having the side of the rectangle opposite each side 21a as the other side.
All of the valve pieces 31 constituting the valve piece group 31, 31, ... are evenly arranged in the circumferential direction about the axis L, and have the same outer shape except for their tips (the ends on the axis L side). Therefore, the relationship between adjacent valve pieces 31 is such that when one valve piece 31 is rotated in the circumferential direction about the axis L by a predetermined angle, the rotated valve piece 31 is arranged in a position that coincides with the other valve piece 31 in the portions other than their tips.

The valve piece 31 and the valve body 3 can also be explained as follows.
In the closed state, the valve piece 31 protrudes from each side of the polygon toward a first point on a virtual line that is perpendicular to a virtual plane of the polygon that closes the inner circumference of the flange 2 and extends in the opposite direction to the container body B. In this embodiment, the orthogonal point where the virtual plane and the virtual line intersect is located on the center side of the regular polygon, more specifically, the center of the regular polygon. Therefore, the virtual line coincides with the axis L. In addition, the first point on the virtual line may include the orthogonal point as long as it is on the virtual line, but in this embodiment, it is a point away from the orthogonal point on the opposite side to the container body B.

The valve pieces 31 have a tip on the axis L side. When viewed from the opposite side to the container body B, all of the valve pieces 31 have a valve piece main body 31a that tapers from each side 21a toward the tip. When viewed from the opposite side to the container body B, a smaller number of the valve pieces 31, more specifically half of the valve pieces 31, have a valve piece main body 31a and a bulge 31b that protrudes from the tip of the valve piece main body 31a in addition to the valve piece main body 31a. Meanwhile, the remaining half of the valve pieces 31 only have the valve piece main body 31a. All of the valve pieces 31 are positioned such that the valve pieces 31 whose tip is formed by the bulge 31b and the valve pieces 31 whose tip is formed by the valve piece main body 31a are alternately arranged in the circumferential direction.

The valve piece 31 has a first plate portion 32, a first hinge portion 33, a second plate portion 34, and a second hinge portion 35, arranged in that order from its tip toward each side portion 21a of the polygonal shape. The valve pieces 31 have a common configuration, except for the presence or absence of a bulge portion 31b relative to the first plate portion 32.

The first hinge group 33, 33, ... which is a set of the first hinge portions 33, and the second hinge group 35, 35, ... which is a set of the second hinge portions 35, are polygonal when viewed from the opposite side to the container body B. More specifically, in the closed state, the polygonal shape of the first hinge group 33, 33, ... is a polygonal shape in which adjacent first hinge portions 33 are circumferentially spaced apart, and the polygonal shape of the second hinge group 35, 35, ... is also a polygonal shape in which adjacent second hinge portions 35 are circumferentially spaced apart.

As shown in Figures 2 and 8, the first hinge portion 33 is thinner than the first plate portion 32 and the second plate portion 34, and serves as a fulcrum for displacing the tip side (first plate portion 32) rather than the first hinge portion itself.

As shown in Figures 2 and 8, the second hinge portion 35 is thinner than the flange body portion 21 and the second plate portion 34, and serves as a fulcrum for displacing the tip side (first plate portion 32, first hinge portion 33, and second plate portion 34) more than itself. Also, as shown in Figure 1, the second hinge portion 35 is rectangular when viewed from the opposite side to the container body B. As described above, the inner circumference of the flange 2 is polygonal with chamfered corners, and the second hinge portion 35 protrudes inward in the diameter direction from the parts other than the corners.

As shown in FIG. 1, in the closed state of the second plate group 34, 34, ... which is a set of second plate portions 34, a triangular gap 34c that tapers toward the circumferentially adjacent first hinge portion 33 is formed between the circumferentially adjacent second plate portions 34, 34. One apex of the gap 34c is located between the circumferentially adjacent first hinge portions 33. The gap 34c also extends between the circumferentially adjacent second hinge portions 35, 35 in a manner that flares out toward the end.

When pressure is applied from the container body B, the second plate portion 34 is pressed from the direction opposite to the pressure application direction, thereby displacing the first plate portion 32 about the first hinge portion 33. The second plate portion 34 includes an inner piece portion 34a on the inner periphery side and an outer piece portion 34b on the outer periphery side.
1, when viewed from the opposite side to the container body B, the inner piece 34a has an inner periphery formed in a straight line representing one side of a regular polygon, and an outer periphery formed in an arc shape concentric with the inner periphery. In the closed state, the outer periphery and inner periphery of the inner piece group 34a, 34a, ... which is a collection of all the inner pieces 34a, are cylindrical with the axis L as the center (more specifically, tapered with a radius increasing toward the container body B).
The outer piece 34b is a plate extending from the outer circumferential surface of the inner piece 34a in the radial direction outward, with the inner circumference being arcuate and the outer circumference being linear and parallel to the inner circumference of the inner piece 34a. In the closed state, the outer piece group 34b, 34b, ... which is a collection of all the outer pieces 34b, extends radially outward in the radial direction from the inner piece group 34a, 34a, ... as the center.

The first plate group 32, 32, ..., which is a collection of first plate portions 32, constitutes the portion of the valve body 3 (valve piece group 31, 31, ...) opposite the container body B. Similarly to the valve body 3, the first plate group 32, 32, ... is hollow hemispherical in the closed state, as shown in Figure 2. The outer periphery of the hemisphere is polygonal, and the container body B side, which corresponds to the bottom side of the hemisphere, is open. In the closed state, the first plate portions 32 of the first plate group 32, 32, ... are adjacent in the circumferential direction when viewed from the opposite side to the container body B, as shown in Figure 1. When viewed from the opposite side to the container body B, the valve body 3 in the closed state has the tips of all the valve piece main body parts 31a (first plate portion group 32, 32, ...) gathered in the center of the valve piece groups 31, 31, ... forming a conceptual unsealed area 3a surrounded by all the gathered valve piece main body parts 31a (first plate portion group 32, 32, ...), and an actual unsealed area 3b is formed by placing an enlarged portion 31b in the conceptual unsealed area 3a.

The first plate portion 32 opens and closes with the first hinge portion 33 as a fulcrum in response to pressure applied from the container body B side in the closed state. In other words, when pressure is applied from the container body B side to the valve body 3 in the closed state to discharge the contents, the first plate portion 32 displaces toward the opposite side of the container body B with the first hinge portion 33 as a fulcrum, and when pressure from the container body B side decreases to end the discharge of the contents to the valve body 3 in the open state, the first plate portion 32 displaces toward the container body B with the first hinge portion 33 as a fulcrum. In addition, the first plate portion 32 has a shape (almost triangular) that protrudes toward the opposite side of the container body B as it moves toward the axis L from the outside in the diameter direction, and tapers toward the axis L when viewed from the opposite side of the container body B.

When viewed from the opposite side to the container body B, the details of the shape of the first plate portion 32 are as follows. All of the first plate portions 32 have a first plate portion main body 32a that tapers from the first hinge portion 33. Half of the first plate portions 32 have, in addition to the first plate portion main body 32a, a bulge portion 31b that protrudes from the tip of the first plate portion main body 32a.

As shown in Figures 1 and 3, the first plate body 32a is a portion surrounded by the first hinge portion 33, which is one side of a triangle and serves as one side of a polygonal shape, two side edges 32d, 32d that extend from both ends of the first hinge portion 33 (one side) (the two vertices of the triangle) to just short of the remaining vertex of the triangle (the center of the polygonal shape, the intersection point P where the two sides intersect), and a connecting line that connects the end points of the two side edges 32d, 32d on the intersection point P side.

In this embodiment, the connecting wire is disposed on the intersection P side of a straight line directly connecting end points of the two side edges 32d, 32d on the intersection P side in all first plate body 32a, and is a line connecting end points of the two side edges 32d, 32d on the intersection P side on the first hinge portion 33 side (each side portion 21a side) of the intersection P. The dimension of this directly connecting straight line is, for example, 0.6 to 2.0 mm, preferably 0.6 to 1.0 mm, and more preferably 0.6 to 0.8 mm.
Moreover, the wiring differs depending on whether or not the expanded portion 31b is present.
In the first plate body 32a without the bulging portion 31b, the connection is a curve 32e that bulges in an arc shape toward the intersection point P (the center of the polygonal shape) in this embodiment. The radius of the arc is, for example, 0.3 to 1.0 mm, preferably 0.3 to 0.5 mm, and more preferably 0.3 to 0.4 mm.
On the other hand, in the first plate body 32a with the bulging portion 31b, since there is no boundary between the first plate body 32a and the bulging portion 31b in reality in this embodiment, the connection is defined as follows. The connection is a straight conceptual line 32f connecting the end points of the intersection point P side of the two side edges 32d, 32d. When adjacent connections in the circumferential direction are connected, a conceptual unsealed area 3a is formed. In this embodiment, the conceptual unsealed area 3a is formed by joining three curved lines 32e as connections and three conceptual lines 32f as adjacent connections. The conceptual unsealed area 3a has a shape in which three of the six sides of a hexagon, which is a regular polygon with the same number as the number of first plate parts 32, are curved lines 32e that are concave in an arc shape toward the center on every other side in the circumferential direction, and the remaining three sides are conceptual lines 32e that extend in a straight line like a regular polygon on every other side in the circumferential direction. Therefore, the conceptual line 32e serves as the boundary line between the first plate portion main body 32a (valve piece main body portion 31a) of the valve piece 3 including the swollen portion 31b and the swollen portion 31b, and forms one side of a polygonal shape similar to the outer periphery of the valve body 31.

The swelling portion 31b swells outward on both sides with respect to the extension lines 32L, 32L of the two sides 32d, 32d of the first plate portion main body 32a to which it is joined, and swells from the first plate portion main body 32a (valve piece main body 31a) toward the intersection P (swells toward the intersection P from the curve 32e as the connection line of the first plate portion main body 32a without the swelling portion 31b). More specifically, the swelling portion 31b includes a pair of first arcs 31d, 31d that respectively follow the arc-shaped connection line (curve 32e) of the first plate portions 32 located on both sides, and a second arc 31e that is tangent to the swelling portions 31b of the remaining two first plate portions 32 with the swelling portions 31b.
The valve body 3 has first plate portions 32 (valve pieces 31) whose tip portions are formed by first plate portion main bodies 32a and first plate portions 32 (valve pieces 31) whose tip portions are formed by bulging portions 31b arranged alternately in the circumferential direction. Hereinafter, when distinguishing between the presence and absence of bulging portions 31b, the first plate portion 32 having the bulging portion 31b will be referred to as the first plate portion 32 with the bulging portion 31b, and the first plate portion 32 without the bulging portion 31b will be referred to as the basic first plate portion 32.

In this embodiment, the bulging portions 31b of the three first plate portions 32 are arranged in the conceptual unsealed area 3a to form the actual unsealed area 3b. The actual unsealed area 3b is composed of a central unsealed area 3c surrounded by the three bulging portions 31b, and a peripheral unsealed area 3d surrounded by the tip of the basic first plate portion 32 sandwiched between two adjacent bulging portions 31b and the two adjacent bulging portions 31b. The central unsealed area 3c and the peripheral unsealed area 3d are shaped like a triangle with each side recessed in an arc.

When viewed from the side opposite the container body B, the valve piece main body 31a has a shape that tapers from each side 21a toward the tip. More specifically, the first plate 32, which is the tip of the valve piece main body 31a, is a portion surrounded by two side edges 32d, 32d that narrow in space from both ends of the first hinge portion 33 located on each side 21a toward the tip and extend to just before the intersection point P, and a connecting line (curve 32e, conceptual line 32f) that connects the tips of the two side edges 32d on the side 21a side of the intersection point P.

The valve piece group 31, 31, ... opens and closes in response to pressure from the container body B side, and in the closed state, separates the opposite side of the container body B from the container body B side, and in the open state, allows the opposite side of the container body B to communicate with the container body B side. In the open state, as shown in Fig. 12, the tips of all the valve pieces 31 of the valve piece group 31, 31, ... are separated in the diameter direction from the axis L, forming an outlet 36. As shown in Fig. 4, the outlet 36 includes a central outlet 36a surrounded by the tips of all the first plate portions 32, and an outer peripheral outlet 36b formed between the first plate portions 32, 42 adjacent in the circumferential direction.
The outer peripheral outlet 36b extends from the periphery of the central outlet 36a toward between the adjacent second plate portions 34, 44.

As shown in FIG. 2, the valve 1 is also provided with recesses 37 in which the second hinge groups 35, 35, . . . are recessed toward the container body B side with respect to both the second plate groups 34, 34, .
The recess 37 is annular, with the inner side surface in the diameter direction of the recess 37 being formed by the outer peripheral surface of the second plate group 34, 34, ..., and the outer side surface in the diameter direction of the recess 37 being formed by the inner peripheral surface of the flange 2. The outer peripheral surfaces of the inner piece group 34a, 34a, ..., which form most of the outer peripheral surface of the second plate group 34, 34, ..., are inclined surfaces that narrow the diameter toward the opposite side to the container body B, and the inner peripheral surface of the flange 2 is inclined surfaces that widen the diameter toward the opposite side to the container body B, so that the width (dimension in the diameter direction) of the recess 37 increases toward the opposite side to the container body B.

The valve 1 is molded by an injection molding die. The valve 1 is molded in a slightly open state as shown in Figs. 4 to 10. Then, the valve 1 is taken out of the die in an open state immediately after molding. Therefore, if a certain amount of time passes without processing the valve 1, the valve 1 will normally harden in the open state. In this case, as shown in the figure, the valve body 3 is in an open state in a normal state, and the first plate portion 32, the first hinge portion 33, and the second plate portion 34 can be displaced toward the container body B side with the second hinge portion 35 as a fulcrum. Therefore, by pressing the second plate portion 34 from the side opposite to the container body B, the first plate portion 32, the first hinge portion 33, and the second plate portion 34 are displaced toward the container body B side with the second hinge portion 35 as a fulcrum, and the closed state of the valve body 3 is maintained when no pressure is applied from the container body B side. This displacement also generates a restoring force in the valve body 3 in the closed state.
However, if the valve 1 is oriented such that the hemispherical bottom surface of the valve body 3 faces downwards when it is removed from the mold, the valve pieces 31, 31, ... will be displaced in the closing direction by the weight of the valve pieces 31, and depending on the degree of displacement, they may harden in the closed state. If it hardens in the closed state, the valve body 3 will be in the closed state under normal conditions, which is different from the example shown in the figure.

In Figures 11 and 12, the cap 5 is a so-called hinge cap. The cap 5 is provided with an inner lid 6 that is attached to the mouth B2 of the container body B and that holds down all of the second plate portions 34 from the side opposite the container body B while ensuring free displacement of all of the first plate portions 32, and an outer lid 7 that can be opened and closed relative to the inner lid 6. The cap 5 also has a connecting portion 5a that connects the inner lid 6 and the outer lid 7 to each other at their outer peripheries so that they can be opened and closed.

The inner lid 6 includes an attachment part 61 that is removably attached to the outer peripheral surface of the mouth part B2 of the container body B, and a partition part 62 that separates the inside (container body B side) of the container body B from the outside (opposite side of the container body B) on the inner peripheral side of the attachment part 61 opposite the container body B, and to which the valve 1 is attached.

The mounting portion 61 has a cylindrical mounting wall 61a and a female thread 61b formed on the inner peripheral surface of the mounting wall 61a. The female thread 61b screws into the male thread B3 of the opening B2 of the container body B.

The partition 62 comprises an annular partition body 63 that protrudes inward in the diameter direction from the entire circumference of the mounting wall 61a at the end opposite the container body B, a cylindrical nozzle portion 64 that protrudes from the inner circumference of the partition body 63 on the side opposite the container body B, and an attachment portion 65 formed on the inner surface side of the partition 62 (the surface facing the container body B) and for attaching the valve 1.

The partition body 63 is an annular plate with a through hole 63a in the center when viewed from the opposite side to the container body B. The partition body 63 has a tapered shape that extends from the outside to the inside in the diameter direction to the opposite side to the container body B. The partition body 63 also separates the inside and outside of the container body B between the through hole 63a and the attachment portion 61. The through hole 63a of the partition body 63 is in communication with the internal space of the nozzle portion 64, and in this embodiment forms an outlet 5h through which the contents pass.

As shown in FIG. 2, the mounting portion 65 includes a receiving groove 65a that receives the flange insertion portion 22 and opens toward the container body B, and a stopper portion 65b that protrudes in the width direction of the receiving groove 65a and supports the flange 2 from the sealing material S side (the side opposite the container body B).

The accommodation groove 65a is a portion that surrounds the cylindrical space from the inside and outside in the diameter direction and from the side opposite the container body B, and is formed by an outer guide portion 66 and an inner guide portion 67 that are arranged at a distance from each other on the outside and inside in the diameter direction of the partition body 63, and a portion that is part of the partition body 63 and joins the outer guide portion 66 and the inner guide portion 67 in the diameter direction from the side opposite the container body B.

The outer guide portion 66 comprises a cylindrical outer wall 66a and a stopper portion 65b that protrudes inward in the diameter direction from the end of the inner circumferential surface of the outer wall 66a on the container body B side.

The inner guide portion 67 has a cylindrical inner wall 67a and guide pieces 67b that protrude from the outer circumferential surface of the inner wall 67a toward the outside in the bore direction and are spaced apart in the circumferential direction.

The inner wall 67a has a recess 67d at the corner between the tip surface on the container body B side and the inner circumferential surface, which presses the second plate portion 34 of the valve body 3 to keep the valve body 3 in a closed state when the valve 1 is attached.
The recess 67d is formed around the entire inner circumference of the inner wall 67a and has an annular shape (annular shape). When the closed state of the valve body 3 is viewed from the opposite side to the container body B, the outer peripheral surface of the second plate group 34, 34, ... is circular as shown in FIG. 1, and the recess 67d presses the corner between the outer peripheral surface of the second plate group 34, 34, ... and the surface opposite to the container body B. When the recess 67d presses the second plate group 34, the first plate 32 comes into contact in the circumferential direction and is in a closed state. In addition, the first plate 32 is displaced to the opposite side to the container body B with the first hinge portion 33 as a fulcrum in response to pressure from the container body B side, and when the pressure from the container body B side is removed, the first plate 32 returns to the closed state.

The outer lid 7 will be described in a closed state. The outer lid 7 comprises a decorative plate 71 that covers the inner lid 6 from the side opposite the container body B, a cylindrical decorative wall 72 that extends circumferentially from the outer periphery of the decorative plate 71 and protrudes toward the container body B, and an outer plug 73 that protrudes from the center of the decorative plate 71 toward the container body B and fits into the nozzle portion 64. The outer plug 73 is cylindrical and fits into the nozzle portion 64 while covering its outer periphery.

The valve 1 of the above-described first embodiment has the following effects when a container is used.
In the valve body 3, the valve piece 31 can be displaced forward from the second hinge part 35 with the second hinge part 35 as a fulcrum, and can also be displaced forward from the first hinge part 33 (first plate part 32) with the first hinge part 33 as a fulcrum. When the valve body 3 is in a closed state, the first plate parts 32 of the first plate part group 32, 32, ... are adjacent to each other in the circumferential direction. Since the bulging part 31b is arranged in the conceptual unsealed area 3a, the actual unsealed area 3b is narrower than the conceptual unsealed area 3a, and the actual unsealed area 3b is narrower than, for example, a case in which all six valve pieces 31 are formed of valve piece main body parts 31a with curves 32e as arc-shaped connections. Moreover, since the bulging part 31b is present at the tip of the valve piece 31, the tip of the valve piece 31 is more suitable for production by an injection molding die than, for example, a case in which the tip of the valve piece 31 is triangular. Also, the valve 1 can be molded so as to be in an open state.

The present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the spirit and scope of the present invention.
For example, in the above embodiment, the valve body 3 has three valve pieces 31 each having an enlarged portion 31b, but the present invention is not limited to this and may be configured so long as a smaller number of valve pieces 31 each having an enlarged portion 31b, for example, a single valve piece 31 each having an enlarged portion 31b.
Furthermore, the connection of the basic first plate portion 32 that does not have the bulge portion 31b is a curve that bulges out like an arc in this embodiment, but this is not limited to this in the present invention, and it may be a line that connects the end points of the two side edges 32d, 32d of the first plate portion 32 on the side of the intersection point P, and may be, for example, a straight line.
In addition, in the first embodiment, the valve body 3 in the closed state is hemispherical with a polygonal outer periphery, and in the second embodiment, it is flat with a polygonal outer periphery, but the present invention is not limited to this and may be, for example, cone-shaped.
In the first embodiment, the valve body 3 is hemispherical, and the valve piece 31 protrudes in an arc shape from each side 21 a of the regular polygon toward the axis L. However, the present invention is not limited to this, and the valve piece 31 may protrude in a spiral shape from each side 21 a of the regular polygon toward the axis L.

B Container body B1 Body B2 Mouth B3 Male thread B5 Outer bag B6 Inner bag B7 Introduction hole L Axis 1 Valve 2 Flange 21 Flange body 21a Edge 22 Flange insertion section 3 Valve body 3a Conceptual unsealed area 3b Actual unsealed area 3c Central unsealed area 3d Peripheral unsealed area 31 Valve piece (valve piece group)
31a Valve piece main body portion 31b Enlarged portion 31d First circular arc 31e Second circular arc 32 First plate portion (first plate portion group)
32a: First plate body; 32d: Side; 32e: Curve; 32f: Conceptual line; 32L: Extension line; 33: First hinge portion (first hinge portion group);
34 Second plate portion (second plate portion group)
34a Inner piece (inner piece group)
34b Outer piece (outer piece group)
34c: gap 35: second hinge portion (second hinge portion group)
36 Outlet 36a Central outlet 36b Outer periphery outlet 37 Recess 5 Cap 5a Connecting portion 5h Outlet 6 Inner lid 61 Mounting portion 61a Mounting wall 61b Female screw 62 Partition portion 63 Partition portion main body 63a Through hole 64 Nozzle portion 65 Mounting portion 65a Storage groove 65b Stopper portion 66 Outer guide portion 66a Outer wall 67 Inner guide portion 67a Inner wall 67b Guide piece 67d Recess 7 Outer lid 71 Decorative plate 72 Decorative wall 73 Outer plug S Sealing material S1 Passing seal S2 Sealing seal S4 Passing port P Intersection

Claims (6)

The valve includes a resin valve body having a polygonal outer periphery and capable of opening and closing in response to pressure applied from the container body side, and a flange extending from the outer periphery of the valve body in a flange-like shape.
The valve body includes a valve piece group that is a collection of elastically deformable valve pieces extending from each side of a polygonal shape,
When viewed from the opposite side to the container body, all of the valve pieces have a valve piece main body portion tapered from each side portion toward a tip, and a smaller number of the valve pieces have, in addition to the valve piece main body portion, a bulge portion that bulges outward with respect to at least one of two extension lines extending from the two tapered side edges of the valve piece main body portion toward the intersection point,
When viewed from the opposite side to the container body, in the closed state of the valve body, the tips of all the valve piece body parts are gathered together and a conceptual unsealed area is formed which is surrounded by all the gathered valve piece body parts;
A valve characterized in that an actual unsealed area is formed by disposing an ampulla in a notional unsealed area. The valve according to claim 1, characterized in that, when viewed from the opposite side to the container body, the bulging portion bulges outward relative to the two extension lines of the valve piece body portion. The valve according to claim 1 or 2, characterized in that, when viewed from the opposite side to the container body, the shape of the tip of the valve piece body has two sides that extend just short of the apex of the three sides that form a triangle. The valve according to claim 1, 2, or 3, characterized in that the outer periphery of the valve body is a polygonal shape with an even number of sides greater than or equal to four, and valve pieces whose tips are formed by swollen parts and valve pieces whose tips are formed by valve piece main body parts are arranged alternately in the circumferential direction. A valve according to any one of claims 1 to 4, characterized in that the conceptually unsealed region has one side of a polygonal shape similar to the outer periphery of the valve body as a boundary line between the valve piece main body portion of the valve piece including the bulge portion and the bulge portion. The valve piece includes a first plate portion, a first hinge portion, a second plate portion, and a second hinge portion in that order from the tip portion to the side portion,
The first and second hinge parts each serve as a fulcrum for displacing the tip side of the hinge part relative to itself,
When the second plate group, which is a set of all the second plate portions, is pressed from the opposite side to the container body, the valve body is in a closed state and the first plate portions of the first plate group, which is a set of all the first plate portions, are adjacent to each other in the circumferential direction,
A valve as described in any one of claims 1 to 5, characterized in that when pressure is applied to the valve body from the container body side in a closed state, the first plate portion is capable of being displaced to the opposite side to the container body, with the first hinge portion as a fulcrum.

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