JP7123501B2 - discharge container - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge container comprising a double structure container body having an outer layer body and an inner layer body, and a discharge cap attached to the mouth of the container body.

Conventionally, as a container for containing liquids such as food seasonings such as soy sauce, cosmetics such as lotion, shampoos, rinses, liquid soaps, and medicines, a double structure container having an outer layer body and an inner layer body has been used. BACKGROUND ART Discharge containers are known which include a main body and a discharge cap attached to a mouth portion of the container body, and in which contents are discharged from a discharge port provided in the discharge cap.

The container body of such a discharge container is provided with an outside air inlet for introducing outside air between the outer layer body and the inner layer body. A check valve is provided for opening and closing the flow path of the contents so as to allow the contents to flow out and prevent the contents and the outside air from flowing into the inner layer body from the discharge port. When the contents are discharged from the outer layer body, the check valve prevents the inflow of outside air from the discharge port into the inner layer body, and introduces outside air between the outer layer body and the inner layer body through the outside air introduction port. Only the inner layer body can be reduced and deformed while maintaining its shape. As a result, the content contained in the inner layer body is discharged without being replaced with the outside air, thereby making it difficult for the content remaining inside the inner layer body to come into contact with the air, thereby suppressing deterioration and deterioration thereof. can be done.

In addition, as the above-described discharge container, an unsealable cap is used for the purpose of obtaining a higher tamper-proof effect than a screw-type discharge cap provided with a female screw portion that engages with a male screw portion provided on the outer peripheral surface of the mouth. There is known a device that employs a plugging type discharge cap that is difficult to reattach later (see, for example, Patent Document 1).

JP 2016-69039 A

For discharge containers in which the container body and the discharge cap are made of different materials, such as a low-density polyethylene container body with a polypropylene discharge cap attached to the mouth, the container body should be recycled (reused). ), it is required to remove the discharge cap from the container body and separate the containers.

However, the stopper type discharge cap is fixed to the mouth by undercutting the projection provided on the outer circumference of the mouth with the projection provided on the inner circumference of the discharge cap. There is a problem that it is difficult to remove the discharge cap from the container body, and when the container body is recycled, the work of sorting the discharge cap from the container body becomes complicated.

SUMMARY OF THE INVENTION An object of the present invention is to solve such problems, and an object thereof is to provide a discharge container in which a discharge cap can be easily removed from the mouth.

A discharge container according to the present invention includes an outer layer body and a volume-reducing and deformable inner layer body housed inside the outer layer body, and an outside air inlet communicating between the outer layer body and the inner layer body. A discharge device comprising a double-structured container body, a top wall portion provided with a discharge port for contents, and a cylindrical side wall portion connected to the top wall portion, and attached to the cylindrical mouth portion of the container body. A discharge container having a cap and a check valve provided inside the discharge cap for opening and closing a flow path of contents toward the discharge port, wherein the external thread is provided on the outer peripheral surface of the mouth. a plurality of vertical ribs provided on the outer peripheral surface of the mouth portion and extending vertically below the male thread portion; and a plurality of vertical ribs provided on the inner peripheral surface of the side wall portion. and a female threaded portion that cuts into and transfers threads to the plurality of vertical ribs, and the female threaded portion can be screwed to the male threaded portion.

In the discharge container of the present invention having the above configuration, it is preferable that the discharge cap is made of a synthetic resin material harder than the container body.

In the discharge container of the present invention, in the configuration described above, the container body is preferably a low-density polyethylene blow-molded article formed by extrusion blow-molding a parison having a laminated structure.

In the discharge container of the present invention having the above structure, it is preferable that the discharge cap is made of polypropylene.

In the discharge container of the present invention having the above configuration, it is preferable that the outside air introduction port is provided at the bottom portion of the container body.

In the discharge container of the present invention having the above configuration, it is preferable that the outside air introduction port is provided in the mouth portion.

ADVANTAGE OF THE INVENTION According to this invention, the discharge container which can remove a discharge cap easily from a mouth part can be provided.

It is a partially notched front view of the discharge container which is one embodiment of this invention. 2 is an enlarged cross-sectional view showing an enlarged main part of the discharge container shown in FIG. 1; FIG. 3 is a cross-sectional view of the discharge cap shown in FIG. 2; FIG. 3 is a cross-sectional view of the mouth portion of the container body shown in FIG. 2; FIG. FIG. 4 is a cross-sectional view of the discharge cap rotated relative to the mouth; 1. It is a partially notched front view of the modification of the discharge container shown in FIG.

Hereinafter, the present invention will be described more specifically by way of example with reference to the drawings.

As shown in FIG. 1, a discharge container 1 according to one embodiment of the present invention is a squeeze type container used for containing a food seasoning such as soy sauce as a content (content liquid). It has a main body 2 and a discharge cap 3 .

In the present specification and claims, the vertical direction means the vertical direction when the discharge container 1 is in an upright position with the discharge cap 3 positioned above the container body 2, as shown in FIG. The radial direction shall mean the direction along a straight line passing through the axis O of the discharge container 1 and perpendicular to the axis O.

The container body 2 has a double structure including an outer layer body 10 and an inner layer body 20 housed inside the outer layer body 10 . In this embodiment, the outer layer body 10 and the inner layer body 20 are made of low density polyethylene resin (LDPE).

The container body 2 is a blow-molded product formed by extrusion blow molding (EBM) of a parison having a laminated structure having a layer corresponding to the outer layer body 10 and a layer corresponding to the inner layer body 20. . The container body 2, which is such a blow-molded product, is a delaminated container in which the inner layer 20 is detachably laminated on the inner surface of the outer layer 10. As shown in FIG.

The outer layer body 10 is a portion that constitutes the outer shell of the container body 2 and has a bottle shape including a mouth portion 11 and a body portion 12 that is integrally connected to the lower end of the mouth portion 11 .

The mouth portion 11 is formed in a cylindrical shape, and a neck ring 13 is integrally provided at the lower end thereof. The neck ring 13 extends in an annular shape over the entire circumference of the mouth portion 11 and protrudes radially outward from the outer peripheral surface of the mouth portion 11 .

The body portion 12 is integrally connected to the lower end of the mouth portion 11 and has a shoulder portion 12a that protrudes radially outward with respect to the mouth portion 11 by gradually expanding its diameter downward. It has a cylindrical barrel body portion 12b integrally connected to the lower end and a bottom portion 12c closing the lower end of the barrel body portion 12b.

The trunk body portion 12b is flexible, and when squeezed (pressed), it can be elastically deformed and dented inward in the radial direction, and the dented state can be restored to its original shape by itself. can do.

The bottom portion 12c is provided with a pinch-off portion 12d by cutting out the laminated parison with a mold during extrusion blow molding. A slit-shaped outside air introduction port 14 is provided in the bottom portion 12c by splitting a portion of the pinch-off portion 12d. The outside air introduction port 14 communicates between the outer layer body 10 and the inner layer body 20 , and can introduce outside air between the outer layer body 10 and the inner layer body 20 .

The inner layer body 20 is formed in the shape of a flexible bag, and is detachably laminated on the entire inner surface of the outer layer body 10 . The interior of the inner layer body 20 serves as a space for containing contents, and the mouth portion of the inner layer body 20 is open at the mouth portion 11 of the outer layer body 10 . The inner layer body 20 can be peeled off from the inner surface of the outer layer body 10 as the contents are poured out through the mouth portion 11 and deformed to reduce the inner volume. When the inner layer body 20 is reduced in volume and deformed, outside air is introduced between the outer layer body 10 and the inner layer body 20 from the outside air introduction port 14 . As a result, the container body 2 can discharge the contents by reducing and deforming only the inner layer 20 while maintaining the original shape of the body 12 .

As shown in FIG. 2, the discharge cap 3 includes a cap body 30 and a lid 40. As shown in FIG.

The cap main body 30 is formed in a substantially topped cylindrical shape having a top wall portion 31 and a cylindrical side wall portion 32 integrally connected to the outer peripheral edge of the top wall portion 31. The side wall portion 32 serves as a mouth portion. 11, and the top wall portion 31 is attached to the mouth portion 11 so as to cover the opening end of the mouth portion 11 from above.

The upper surface of the top wall portion 31 is integrally provided with a discharge port 33 for the contents. The discharge port 33 penetrates the top wall portion 31, and the contents contained in the inner layer body 20 can be discharged from the discharge port 33 to the outside. In the present embodiment, the discharge port 33 is formed in a tubular shape whose diameter gradually expands upward from the top wall portion 31 , but the shape and size of the discharge port 33 may be accommodated in the inner layer body 20 . Various changes are possible according to the type of the object.

The lid body 40 is formed in a truncated cylindrical shape having substantially the same diameter as the cap body 30 , and is connected to the cap body 30 via a hinge 41 at a part of the outer peripheral surface so as to be openable and closable. The lid 40 is integrally provided with a cylindrical plug member 43 on the inner surface of the top wall 42 thereof. , so that the discharge port 33 is closed. A rod-shaped projection 44 extending downward along the axis of the plug member 43 is integrally formed on the inner surface of the top wall 42 .

The lid 40 is closed by covering the top wall 31 of the cap body 30 by engaging the locking groove 45 provided on the inner periphery of the opening edge with the outer periphery of the top wall 31 in an undercut manner. state. On the other hand, when the cover 40 is at the open position indicated by the two-dot chain line in FIG. 1, the plug member 43 is separated from the discharge port 33, and the discharge port 33 is opened to discharge the contents.

The discharge cap 3 is preferably made of a synthetic resin material that is harder than the container body 2 . In this embodiment, the discharge cap 3 is made of polypropylene, which is a synthetic resin material harder than low-density polyethylene.

Inside the discharge cap 3 , a check valve 50 is provided for opening and closing the flow path of the contents from the accommodation space inside the inner layer body 20 toward the discharge port 33 . In this embodiment, the check valve 50 has a cylindrical wall 51 integrally connected to the lower side of the discharge port 33 and a valve body 52 disposed inside the cylindrical wall 51. It is configured as a ball valve type. The cylindrical wall 51 has a diameter that gradually narrows from the top to the bottom, and has a plurality of ribs 53 that hold the valve element 52 on the inner peripheral surface thereof. The valve body 52 is made of steel, resin, or the like and formed into a spherical shape (ball), and is vertically movable inside the cylindrical wall 51 .

When the container body 2 is in an upright posture with the discharge port 33 facing upward, the valve body 52 of the check valve 50 abuts against the diameter-reduced portion of the cylindrical wall 51 over the entire circumference, thereby opening the discharge port 33 . is blocked. On the other hand, when the container body 2 is tilted with the discharge port 33 facing downward, the valve body 52 directs the inside of the cylindrical wall 51 toward the discharge port 33 as indicated by the two-dot chain line in FIG. The check valve 50 is opened by moving with the As a result, the discharge port 33 is opened so as to communicate with the storage space inside the inner layer body 20, and the content stored inside the inner layer body 20 is discharged outside through the discharge port 33 by its own weight. At this time, by squeezing the trunk body portion 12b, the momentum or amount of the contents ejected from the ejection port 33 can be adjusted.

After the contents have been poured out, when the container main body 2 is returned to the upright position with the discharge port 33 directed upward, the valve body 52 moves downward inside the cylindrical wall 51 to form a diameter-reduced portion. , and the discharge port 33 is closed. At this time, the content remaining inside the discharge port 33 can be sucked toward the inside of the cylindrical wall 51 by the movement of the valve body 52 . As a result, it is possible to reduce the amount of content remaining inside the ejection port 33 and prevent the liquid from dripping from the ejection port 33 .

Next, a configuration for fixing and holding the discharge cap 3 to the mouth portion 11 of the container body 2 will be described.

As shown in FIG. 3, a female screw portion 60 is integrally formed on the inner peripheral surface of the side wall portion 32 of the discharge cap 3 . The female screw portion 60 protrudes radially inward from the inner peripheral surface of the side wall portion 32 and extends spirally.

On the other hand, as shown in FIG. 4 , a male threaded portion 61 is integrally provided on the outer peripheral surface of the mouth portion 11 . The male threaded portion 61 protrudes radially outward from the outer peripheral surface of the mouth portion 11 and extends spirally. The diameter and pitch of the male threaded portion 61 are the same as those of the female threaded portion 60, so that the male threaded portion 61 can be screwed to the female threaded portion 60. As shown in FIG.

In the present embodiment, the female threaded portion 60 and the male threaded portion 61 are configured as two-start threads, but may be single-start threads or three or more threads.

A plurality of vertical ribs 62 extending in the vertical direction are integrally provided on the outer peripheral surface of the mouth portion 11 below the male screw portion 61 . The plurality of vertical ribs 62 are arranged at regular intervals in the circumferential direction and protrude radially outward from the outer peripheral surface of the mouth portion 11 . Further, the lower ends of the plurality of vertical ribs 62 are connected to the upper surface of the neck ring 13 respectively. Furthermore, the diameter of the virtual circle passing through the radially outer tip portions of the plurality of vertical ribs 62 passes through the radially inner tip portion of the internal thread portion 60 provided on the inner peripheral surface of the side wall portion 32 of the cap body 30. It is larger than the diameter of the virtual circle and smaller than the diameter of the inner peripheral surface of the side wall portion 32 .

The male threaded portion 61 and the vertical ribs 62 are provided at least in a range facing the female threaded portion 60 when the discharge cap 3 is attached to the mouth portion 11 .

The discharge cap 3 having the above structure can be attached to the mouth portion 11 by pressing the discharge cap 3 into the mouth portion 11 along the axis O with a predetermined load.

When the discharge cap 3 is plugged onto the mouth portion 11 , the female thread portion 60 provided on the inner peripheral surface of the side wall portion 32 of the cap body 30 elastically engages the male thread portion 61 provided on the outer peripheral surface of the mouth portion 11 . It overcomes while deforming and moves to a predetermined position while elastically deforming the plurality of vertical ribs 62 . Then, as shown in FIG. 2, when the discharge cap 3 is pushed into the mouth portion 11 to a predetermined position, the female threaded portion 60 bites into the plurality of vertical ribs 62, and the female threaded portions are engaged with the plurality of vertical ribs 62. As shown in FIG. A screw 63 is transferred by 60 .

By transferring the screws 63 to the plurality of vertical ribs 62 , the female threaded portion 60 is locked to the vertical ribs 62 . As a result, the ejection cap 3 is attached to the mouth portion 11 in a state in which it is held against the mouth portion 11 so as not to come off in the vertical direction. In the state in which the discharge cap 3 is held by the mouth portion 11 to prevent it from slipping off, the female thread portion 60 may or may not be threadedly coupled to the male thread portion 61 of the mouth portion 11 . When the female threaded portion 60 is threadedly coupled to the male threaded portion 61 of the mouth portion 11 , the discharge cap 3 can be more firmly held against the mouth portion 11 without coming off.

On the other hand, although the discharge container 1 is configured such that the discharge cap 3 is attached to the mouth portion 11 of the container body 2 by plugging, the discharge cap 3 can be operated simply by rotating the discharge cap 3 relative to the mouth portion 11 . , the discharge cap 3 can be easily removed from the mouth portion 11 of the container body 2 .

As shown in FIG. 2, when the discharge cap 3 is attached to the mouth portion 11 of the container body 2, the threads 63 are transferred to the plurality of vertical ribs 62 by biting the female thread portions 60. As shown in FIG. Therefore, when the discharge cap 3 is rotated about the axis O relative to the mouth portion 11 from this state, as shown in FIG. A force is applied to the discharge cap 3 to push it upward. That is, the female screw portion 60 bites into the plurality of vertical ribs 62 and the screws 63 are transferred, so that the ejection cap 3 is simply screwed to the mouth portion 11, so that the ejection cap 3 can be attached to the mouth portion. By rotating the discharge cap 3 relative to 11 in a direction to loosen the screw connection, the discharge cap 3 can be pushed upward with respect to the mouth portion 11 .

At this time, since the male threaded portion 61 provided on the outer peripheral surface of the mouth portion 11 can be screwed to the female threaded portion 60, the relative rotation of the discharge cap 3 with respect to the mouth portion 11 is not hindered. . In particular, when the female threaded portion 60 is threadedly coupled to the male threaded portion 61 of the mouth portion 11 while the ejection cap 3 is retained on the mouth portion 11, the ejection cap 3 is rotated relative to the mouth portion 11. 2, the discharge cap 3 is pushed upward with respect to the mouth portion 11 also at the screw connection portion between the male thread portion 61 and the female thread portion 60, so that the discharge cap 3 can be more easily removed from the mouth portion 11. be able to.

As described above, according to the discharge container 1 of the present embodiment, the plurality of vertical ribs 62 are provided on the outer peripheral surface of the mouth portion 11 and the plurality of vertical ribs 62 are provided on the inner peripheral surface of the side wall portion 32 of the discharge cap 3 . Since the female screw portion 60 is provided for biting into and transferring the screw 63, a simple operation of rotating the discharge cap 3 fixed to the mouth portion 11 by plugging relative to the mouth portion 11 can be performed. It can be easily removed from the mouth portion 11 . Therefore, the discharge cap 3 can be easily removed from the mouth portion 11 of the container body 2 while the discharge cap 3 is attached to the mouth portion 11 of the container body 2 by plugging and has a high tamper-proof effect. As a result, the work of separating the discharge cap 3 from the container body 2 when recycling the container body 2 can be facilitated.

In this embodiment, the outer layer 10 of the container body 2 provided with the vertical ribs 62 is made of low-density polyethylene, and the discharge cap 3 is made of polypropylene, which is harder than the container body 2. The screws 63 can be reliably transferred to the plurality of vertical ribs 62 by the female threaded portion 60 . As a result, even in the discharge container 1 in which the discharge cap 3 made of polypropylene is attached to the mouth portion 11 of the container body 2 whose outer layer body 10 is made of low-density polyethylene, the above effect can be reliably obtained.

In particular, in the present embodiment, the female threaded portion 60 is formed in a triangular shape with an acute angled tip. It is possible to reliably obtain the effect that the discharge cap 3 can be easily removed from the mouth portion 11 of the container body 2 .

The shape, material, etc. of the female threaded portion 60, the male threaded portion 61, and the plurality of vertical ribs 62 are set so that the pressing force when plugging the discharge cap 3 onto the mouth portion 11 of the container body 2 is 150 to 250N. preferably As a result, the discharge cap 3 is securely held by the container body 2 to the extent that the discharge cap 3 does not easily come off from the mouth portion 11 of the container body 2 during normal use, such as when the contents are to be discharged. The female threaded portion 60 can be bitten into the plurality of vertical ribs 62 with such a strength that it can be easily removed from the mouth portion 11 of the main body 2 .

When the discharge cap 3 made of polypropylene is put on the mouth portion 11 of the container body 2 made of high-density polyethylene, the pressing force for the plugging is 300 to 400 N, and the pressure of the mouth portion of the container body 2 made of polyethylene terephthalate is 11 is preferably set to 200 to 300N when the discharge cap 3 made of polypropylene is plugged. As a result, when the discharge cap 3 made of polypropylene is capped to the mouth portion 11 of the container body 2 made of high-density polyethylene, and the discharge cap 3 made of polypropylene is capped to the mouth portion 11 of the container body 2 made of polyethylene terephthalate. Even in this case, the discharge cap 3 is securely held by the container body 2 to the extent that the discharge cap 3 is not easily separated from the mouth portion 11 of the container body 2 during normal use such as discharging the contents. The female threaded portion 60 can be bitten into the plurality of vertical ribs 62 with such a strength that it can be easily removed from the mouth portion 11 of the container body 2 .

The discharge container 1 is preferably configured so that the rotational torque required to remove the discharge cap 3 from the container body 2 is in the range of 100 to 200 N cm, and the rotational torque is preferably 150 N cm. more preferred. With such a configuration, the discharge cap 3 is not easily removed from the container main body 2 during distribution of the discharge container 1, and the discharge cap 3 can be easily removed from the container main body 2 during the sorting operation after use after discharging the contents. can be configured.

As described above, in the discharge container 1 of the present embodiment, the male threaded portion 61 provided on the outer peripheral surface of the mouth portion 11 can be screwed into the female threaded portion 60 provided on the inner peripheral surface of the side wall portion 32 of the discharge cap 3. With this configuration, not only can the discharge cap 3 be attached to the mouth portion 11 by capping using a capping device, but also the capper for attaching the screw-type discharge cap to the mouth portion of the container body. The discharge cap 3 can also be attached to the mouth portion 11 of the container body 2 by screw tightening using .

In a configuration in which the male threaded portion 61 is not provided on the outer peripheral surface of the mouth portion 11 , when the discharge cap 3 is attached to the mouth portion 11 by screwing using a capper, the discharge cap 3 may be displaced from the axial center O of the mouth portion 11 . In this case, the internal thread portion 60 may not be able to transfer the thread 63 having an appropriate shape to the longitudinal rib 62 . In this case, the ejection cap 3 may be fixed and held on the mouth portion 11 while being inclined with respect to the axis O, and the product may become defective.

In contrast, in the discharge container 1 of the present embodiment, the outer peripheral surface of the mouth portion 11 is provided with the male threaded portion 61 that can be screwed into the female threaded portion 60. Therefore, the discharge cap 3 is screwed using a capper. When attached to the mouth portion 11 , the female threaded portion 60 is threadedly coupled to the male threaded portion 61 and guided by the male threaded portion 61 . As a result, the screw 63 can be accurately transferred to the vertical rib 62 by the female screw portion 60 so that the discharge cap 3 is pushed into the mouth portion 11 without being inclined with respect to the axis O. As shown in FIG. Therefore, the ejection cap 3 is not fixed and held on the mouth portion 11 while being inclined with respect to the axis O. As shown in FIG.

In addition, by screwing the female threaded portion 60 to the male threaded portion 61 , the female threaded portion 60 bites into the vertical rib 62 and the female threaded portion 60 is screwed to the male threaded portion 61 . 11, the discharge cap 3 can be fixed and held to the mouth portion 11 more firmly.

As described above, according to the discharge container 1 of the present embodiment, the female threaded portion 60 provided on the inner peripheral surface of the side wall portion 32 of the ejection cap 3 can be screwed to the male threaded portion 61 provided on the outer peripheral surface of the mouth portion 11 . Therefore, the discharge cap 3 can be attached to the mouth portion 11 by both plugging and screwing with a capper. Therefore, the process of attaching the discharge cap 3 to the mouth portion 11 can be performed by either a capping device or a capper, so that the manufacturing efficiency of the discharge container 1 can be improved.

6 is a partially cutaway front view of a modification of the discharge container shown in FIG. 1. FIG. In FIG. 6, members corresponding to the members described above are denoted by the same reference numerals.

The container body 2 of the discharge container 1 shown in FIG. 1 has a structure in which a slit-shaped outside air introduction port 14 is provided in the bottom portion 12c of the body portion 12. However, as shown in FIG. As 2, it is also possible to use a configuration in which the opening 11 is provided with an outside air introduction port 14 . The outside air introduction port 14 is configured as a through hole radially penetrating the mouth portion 11 , and communicates between the outer layer body 10 and the inner layer body 20 at one end side thereof.

In the illustrated case, a pair of outside air introduction ports 14 facing each other about the axis O are provided in the mouth portion 11, but the number of the outside air introduction ports 14 provided in the mouth portion 11 can be variously changed.

In this modified example, an annular closing projection 15 is integrally provided on the outer peripheral surface of the mouth portion 11 and is located below the outside air introduction port 14 and extends along the entire circumference of the mouth portion 11 . The inner peripheral surface on the lower end side of the side wall portion 32 is in airtight contact with the closing projection 15 . As a result, a closed space is formed between the discharge cap 3 and the mouth portion 11, and the outside air introduction port 14 opens into the closed space. On the other hand, the top wall portion 31 of the cap body 30 is provided with a vent hole 34 that opens to the outside, and the sealed space is a gap between an inner plug 70 provided inside the cap body 30 and the side wall portion 32. It communicates with the vent 34 via the . In this manner, the outside air introduction port 14 is configured to introduce outside air between the outer layer body 10 and the inner layer body 20 via the sealed space and the vent 34 . A check valve for introducing the outside air may be provided between the outside air introduction port 14 and the ventilation port 34 .

6, the check valve 50 includes a cylindrical portion 71 held between the top wall portion 31 of the cap body 30 and the inner plug 70, and three elastically deformable legs. It is configured as a three-point valve including a disk-shaped valve body 73 held in the tubular portion 71 by a portion 72 . The valve body 73 is arranged on the upper surface of the inner plug 70 and closes a content communication hole 74 provided in the inner plug 70 . When the body portion 12b is squeezed to discharge the contents, the pressure inside the inner layer body 20 is increased to elastically deform the leg portion 72 so that the valve body 73 separates from the upper surface of the inner plug 70. It moves and the flow hole 74 is opened. As a result, the contents contained in the inner layer body 20 are discharged to the outside through the communication holes 74 and the discharge port 33 . On the other hand, when the barrel body portion 12b is released from the squeeze, the internal pressure of the inner layer body 20 is reduced, and the elastic force of the leg portion 72 causes the valve body 73 to return to the position in contact with the upper surface of the inner plug 70. is occluded.

As shown in the figure, the inner plug 70 may be provided with a ball valve 80 for sucking back the contents remaining in the discharge port 33 when the squeeze of the body portion 12b is released.

In the modified discharge container 1 having the above configuration, a plurality of vertical ribs 62 are provided on the outer peripheral surface of the mouth portion 11, and the plurality of vertical ribs 62 bite into the inner peripheral surface of the side wall portion 32 of the discharge cap. By providing the female screw portion 60 for transferring the screw 63, the ejection cap 3 can be attached to the mouth portion 11 by a simple operation of rotating the ejection cap 3 relative to the mouth portion 11, similar to the one shown in FIG. It is possible to obtain the effect that it can be easily removed from. A male threaded portion 61 that can be screwed to a female threaded portion 60 is provided on the outer peripheral surface of the mouth portion 11, so that the discharge cap 3 can be screwed by either plugging or capping, as in the case shown in FIG. It is also possible to obtain the effect that it can be attached to the mouth portion 11 by

It goes without saying that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

For example, in the above-described embodiment, the container body 2 is a delamination container, but this is not restrictive. A heavy container can also be used.

In the above-described embodiment, the container body 2 is made of low-density polyethylene and the discharge cap 3 is made of polypropylene. , these materials can be changed in various ways.

Furthermore, in the above-described embodiment, the container body 2 is a polypropylene blow-molded product formed by extrusion blow-molding a parison having a laminated structure. The material and manufacturing method can be changed in various ways, for example, a blow-molded article made of polyethylene terephthalate formed by blow-molding a preform assembly incorporating a preform.

Furthermore, in the above-described embodiment, the plurality of vertical ribs 62 are shaped so as to extend straight in the vertical direction (longitudinal direction) parallel to the axis O. It is good also as a shape which extends in the up-and-down direction. Further, the vertical rib 62 may be configured to have intermittent portions dividing the vertical rib 62 in the vertical direction.

Furthermore, in the above-described embodiment, the lengths of the plurality of longitudinal ribs 62 are all the same length, but this is not restrictive. A structure in which longitudinal ribs 62 having different lengths are mixed, such as having a length longer than that of the other longitudinal ribs 62, is also possible.

Furthermore, the container main body 2 is not limited to one formed by the above manufacturing method, and one manufactured by various methods can also be employed.

1 discharge container 2 container body 3 discharge cap 10 outer layer body 11 mouth portion 12 body portion 12a shoulder portion 12b body body portion 12c bottom portion 12d pinch-off portion 13 neck ring 14 outside air inlet 15 closing projection 20 inner layer body 30 cap body 31 Top wall 32 Side wall 33 Discharge port 34 Vent 40 Lid 41 Hinge 42 Top wall 43 Plug member 44 Rod-shaped projection 45 Locking groove 50 Check valve 51 Cylindrical wall 52 Valve body 53 Rib 60 Female screw 61 Male screw 62 Vertical rib 63 Screw 70 Inner plug 71 Cylindrical part 72 Leg part 73 Valve element 74 Through hole 80 Ball valve for suckback O axis

Claims (6)

a double-structured container body comprising an outer layer body and a volume-reducing and deformable inner layer body housed inside the outer layer body, and having an outside air inlet communicating between the outer layer body and the inner layer body; ,
a discharge cap having a top wall portion provided with a discharge port for contents and a cylindrical side wall portion connected to the top wall portion, the discharge cap being attached to the cylindrical mouth portion of the container body;
a check valve that is provided inside the discharge cap and that opens and closes a flow path of the contents toward the discharge port, the discharge container comprising:
a male thread provided on the outer peripheral surface of the mouth;
a plurality of vertical ribs provided on the outer peripheral surface of the mouth portion and extending vertically below the male thread portion;
a female thread portion provided on the inner peripheral surface of the side wall portion and biting into the plurality of vertical ribs to transfer threads to the plurality of vertical ribs;
A discharge container, wherein the female threaded portion can be screwed to the male threaded portion. 2. The discharge container according to claim 1, wherein said discharge cap is made of a synthetic resin material harder than said container body. 3. The discharge container according to claim 1 or 2, wherein the container body is a low-density polyethylene blow-molded article formed by extrusion blow-molding a laminated parison. The dispensing container according to any one of claims 1 to 3, wherein the dispensing cap is made of polypropylene. The discharge container according to any one of claims 1 to 4, wherein the outside air inlet is provided at the bottom portion of the container body. The discharge container according to any one of Claims 1 to 4, wherein the outside air introduction port is provided in the mouth portion.

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