JP7195624B2 - Spout tool - Google Patents

Description

TECHNICAL FIELD The present invention relates to a spout fitting attached to an opening of a container containing fluid therein.

2. Description of the Related Art Conventionally, among pouring spouts attached to openings of containers such as packaging bags, spouts are known that are configured to suppress the inflow of outside air (oxygen) into the container through a channel formed inside. It is

For example, Patent Document 1 discloses a spout having a cylindrical inner cylindrical main body and a container joining cylinder integrally connected to the lower part thereof, and forming a fluid flow path inside, and an inner cylindrical main body of the spout. A spout is disclosed that includes a cap that is detachably attached by threaded engagement with the portion. The container-joining tube includes a tubular base integrally connected to the inner tubular main body, and projecting pieces projecting radially outward from the outer surface of the tubular base. The interior of the shaped base constitutes a fluid flow path. Also, the cap has a bottomed cylindrical plug that is inserted into the inner cylindrical main body and cylindrical base of the spout to block the flow path inside the spout.

In the spout having such a structure, oxygen permeating through the outer surface of the inner tubular main body flows axially through the inner tubular main body into the container. In the spout tool described in Patent Document 1, in order to suppress the inflow of such oxygen, the outer surface of the stopper of the cap is formed with a portion that comes into close contact with the inner surface of the cylindrical base of the spout. It is said that this makes it possible to prevent oxygen flowing axially inside the inner cylindrical main body portion from flowing inside the cylindrical base portion and flowing into the container.

JP 2018-90271 A

However, since permeation of oxygen through the inner cylindrical body cannot be blocked, even if the amount of oxygen flowing inside the cylindrical base can be limited, it is impossible to block oxygen from flowing into the container. It is difficult. From the viewpoint of oxygen barrier properties, there is still room for improvement.

The present invention has been made in view of such conventional circumstances, and an object thereof is to provide a spout tool having excellent oxygen barrier properties.

In order to solve the above-mentioned problems, the present invention provides a pouring outlet tool attached to an opening of a container containing a fluid therein, comprising: a cylindrical pouring part forming a flow path for the fluid; a lid portion detachably attached to the spouting portion by screwing with the spouting portion, the lid portion having a bottomed cylindrical lid body portion inserted inside the spouting portion; A gas barrier sheet is attached from the lower surface of the spout portion to the bottom surface of the lid main body, and the gas barrier sheet is subjected to half-cut processing or poroso processing.

According to the above configuration, the flow of oxygen is suppressed by the gas barrier sheet attached from the bottom surface of the spout portion to the bottom surface of the lid body portion. Therefore, even if the oxygen that permeates the outer surface of the spouting portion flows axially through the inside of the spouting portion and reaches the lower end thereof, the oxygen is prevented from flowing into the container. A spout tool having excellent oxygen barrier properties can be obtained.

In addition, since the gas barrier sheet is subjected to half-cut processing or poroso processing, it can be easily torn. Note that half-cut processing is processing for forming fine holes or cuts halfway through the gas barrier sheet in the thickness direction, and poroso processing is processing for penetrating and forming fine holes in the thickness direction of the gas barrier sheet. The micropores formed by poroso processing have a diameter of about 10 μm and are excellent in oxygen barrier properties.

The fluid contained in the container is not limited to liquids and viscous substances, and includes solids (solids, granules, powders, etc.).
In the above configuration, the pouring portion includes a cylindrical main body portion and a mounting portion integrally connected to a lower portion of the main body portion and protruding radially from the main body portion. It is preferable that the gas barrier sheet is attached from the lower surface of the attachment portion to the bottom surface of the lid body portion.

According to the above configuration, the bonding area of the gas barrier sheet is increased, and the bonding strength is increased. Moreover, when the spout tool is attached to the opening of the container, the joint area between the container and the spout tool increases, and the strength of the joint between the spout tool and the container increases.

Said structure WHEREIN: It is preferable that the bottom surface of the said cover main-body part protrudes below from the lower surface of the said attachment part.
According to the above configuration, since the bottom surface of the lid main body protrudes downward, the gas barrier sheet is firmly bonded to the bottom surface of the lid main body when the gas barrier sheet is bonded by crimping. The bonding strength of the gas barrier sheet increases.

In the above configuration, the bottom surface of the lid main body is formed with an annular ridge protruding downward at a position near the outer periphery thereof, and the bottom surface of the ridge is formed flat. is preferred.

According to the above configuration, a higher sealing pressure can be applied when the gas barrier sheet is joined by crimping. As a result, the gas barrier sheet is firmly bonded to the protrusions of the lid main body, and the bonding strength of the gas barrier sheet is increased.

In the above configuration, it is preferable that a gap is formed between the inner peripheral surface of the pouring portion and the outer peripheral surface of the lid main body at the lower surface of the pouring portion and the bottom surface of the lid main body.
When the container is unsealed, the cover attached to the spout is rotated to remove the cover from the spout. At this time, the gas barrier sheet affixed from the lower surface of the spout portion to the bottom surface of the lid main body is such that the portion affixed to the bottom surface of the lid main body portion is attached to the lower surface of the spout portion. pulled upwards. As a result, the gas barrier sheet is torn between the bottom surface of the spout portion and the bottom surface of the lid body.

According to the above configuration, when the portion of the gas barrier sheet attached to the lid body is pulled upward, the gas barrier sheet is formed between the inner peripheral surface of the spout portion and the outer peripheral surface of the lid body. It is stretched in the narrow gap and easily hits the corner of the lower surface of the spout portion on the side of the lid main body portion. Therefore, the gas barrier sheet is easily torn. In addition, the generation of torn pieces generated by being torn is suppressed.

According to the present invention, a spout tool having excellent oxygen barrier properties can be obtained.

The perspective view of the spout tool of this embodiment. FIG. 4 is a vertical cross-sectional view of the spout tool; The longitudinal cross-sectional view of the spout tool of the example of a change. The longitudinal cross-sectional view of the spout tool of the example of a change. It is the perspective view which looked at the spout tool from the lower surface, (a) is the spout tool of this embodiment, (b), (c) is the spout tool of a modification.

Hereinafter, a spout tool embodying the present invention will be described.
The spout 1 of the present embodiment is attached to the opening of a bag-like container made of synthetic resin to form a channel for pouring out the fluid contained inside the bag-like container. The spout 1 is adhesively fixed to the opening of the bag-like container by heat sealing. The bag-like container of this embodiment is formed of a multi-layer structure sheet in which an aluminum foil layer is laminated between a plurality of thin polyethylene sheets. In the following description, up and down and left and right shown in FIG.

As shown in FIGS. 1 and 2, the pouring spout 1 is detachably attached to the pouring part 2 by screwing the pouring part 2, which forms a fluid flow path C therein, with the pouring part 2. and a sheet body 5 as a gas barrier sheet.

As shown in FIG. 2, the pouring part 2 has a flow path C formed therein, a cylindrical main body part 20 formed over the entire length of the pouring part 2, and a lower part of the main body part 20. A mounting portion 30 formed integrally with the cylinder main body portion 20 is provided.

The inner peripheral surface of the cylinder body portion 20 is formed in a straight shape whose diameter does not change in the vertical direction, and is formed as a flat surface without unevenness. As a result, when the fluid is poured out from the inside of the bag-like container, the fluid is prevented from adhering or remaining on the inner peripheral surface of the cylinder main body 20 forming the flow path C. As shown in FIG.

A male screw 21 is formed on the outer peripheral surface of the upper portion of the cylinder body portion 20 so as to extend in the circumferential direction. An annular protrusion 22 that protrudes in the radial direction is formed along the entire circumference of the outer peripheral surface of the vertical intermediate portion of the cylinder main body 20 . Furthermore, a plurality of ratchets 23 are formed on the upper portion of the annular protrusion 22 .

As shown in FIGS. 1 and 2 , the attachment portion 30 is formed in a lower portion of the cylinder main body portion 20 so as to protrude radially outward from the outer peripheral surface of the cylinder main body portion 20 . The mounting portion 30 is formed of a plurality of ribs elongated in the left-right direction when viewed from above. The plurality of ribs are composed of an upper wall 31 provided on the upper side, a lower wall 32 provided on the lower side, and a plurality of intermediate walls 33 provided between the upper wall 31 and the lower wall 32 . The upper wall 31, the lower wall 32, and the intermediate wall 33 have the same shape and size, extend parallel to each other, and have their side surfaces flush with each other in the vertical direction. Each side surface of the upper wall 31, the lower wall 32, and the intermediate wall 33 is a portion to which the opening of the bag-like container is adhered and fixed by heat sealing, and is formed as a flat surface without unevenness. The bottom surface 32a of the bottom wall 32 is a surface to which the sheet body 5 is attached together with the bottom surface 45a of the lid main body portion 41 of the lid portion 4, which will be described later. The upper wall 31 , the lower wall 32 and the intermediate wall 33 are integrally connected by a connecting wall 34 extending in the horizontal direction between the upper wall 31 , the lower wall 32 and the intermediate wall 33 .

As shown in FIG. 2, on the inner peripheral side lower surface of the cylinder main body portion 20, a ridge portion 24 formed by notching the lower surface of the cylinder main body portion 20 from below is formed on the inner peripheral surface of the cylinder main body portion 20. It is formed in a shape that conforms to The ridge portion 24 is formed in an annular shape having the same center as the cylinder main body portion 20, and is formed in a sharp-pointed triangular shape in a side view that tapers downward. In other words, as shown in the enlarged view of FIG. 2, the ridge portion 24 is a side surface extending downward from the upper surface of a stepped portion 24b that is recessed upward on the inner peripheral side lower surface of the cylinder main body portion 20 and has a rectangular shape in a side view. It is formed integrally with the cylinder main body portion 20 as a portion having a triangular shape and a pointed shape. A tip edge 24 a of the ridge portion 24 is positioned slightly above the lower surface 32 a of the lower wall 32 of the mounting portion 30 .

As shown in FIGS. 1 and 2, the lid portion 4 includes a bottomed cylindrical lid main body portion 41 inserted inside the pouring portion 2 and extending radially outward from the upper end portion of the lid main body portion 41. It has a flange portion 42 and an outer cylindrical portion 43 extending downward from the outer end of the flange portion 42 .

As shown in FIG. 2 , the lid main body 41 is formed as a hollow body having a cylindrical peripheral wall 44 and a bottom wall 45 provided at the lower edge of the peripheral wall 44 . The upper surface of the lid body portion 41 is open. Since the lid main body 41 is inserted inside the tube main body 20 of the pouring part 2 , the bottom wall 45 of the lid main body 41 blocks the channel C of the tube main body 20 .

The inner peripheral surface of the peripheral wall 44 of the lid main body 41 is formed in a straight shape whose diameter does not change in the vertical direction. A projection 46 projecting in the radial direction is formed on the upper portion of the outer peripheral surface of the peripheral wall 44 over the entire circumference, and the lower end of the projection 46 is formed as a tapered surface 46a whose diameter decreases toward the bottom. ing. The outer peripheral surface of the peripheral wall 44 is formed in a straight shape in which the diameter does not change in the vertical direction at the portion where the protrusion 46 is not formed, and the inner peripheral surface is formed as a flat surface without unevenness. A bottom surface 45a of the bottom wall 45 is formed as a flat surface that is horizontal in the horizontal direction and has no unevenness.

The outer diameter of the peripheral wall 44 of the lid main body 41 is slightly smaller than the inner diameter of the tube main body 20 of the pouring part 2 . As a result, when the lid portion 4 is attached to the pouring portion 2 , a width L1 gap is formed. The width L1 is approximately 0.3 to 0.5 mm. Also, the projection length of the protrusion 46 formed on the upper portion of the peripheral wall 44 is equal to the width L1. Note that the size of the width L1 can be changed as appropriate. The size of the width L1 can be set in consideration of how easily the sheet body 5 is torn by the protrusions 24 . Also, the projection length of the protrusion 46 may be different from the width L1, and can be changed as appropriate. For example, it may be smaller than the width L1.

The vertical length of the lid main body portion 41 is set to match the vertical length of the cylinder main body portion 20 of the pouring portion 2 . Specifically, in the lid body portion 41, the length from the lower surface of the flange portion 42 to the bottom surface 45a of the bottom wall 45 is the length from the upper end surface of the cylinder body portion 20 to the lower surface 32a of the lower wall 32 of the mounting portion 30. is equal to As a result, when the lid portion 4 is attached to the pouring portion 2 , the upper end surface of the cylinder main body portion 20 of the pouring portion 2 contacts the lower surface of the flange portion 42 of the lid portion 4 , and the lid main body portion 41 The bottom surface 45a of the bottom wall 45 is flush with the bottom surface 32a of the mounting portion 30 of the pouring portion 2 .

The outer cylindrical portion 43 is formed in a shape that surrounds the lid body portion 41 while forming a predetermined gap from the outer peripheral surface of the lid body portion 41 . The outer cylindrical portion 43 has a cylindrical shape concentrically with the lid body portion 41 . A female screw 47 to be screwed with the male screw 21 of the tube main body portion 20 of the pouring portion 2 is provided on the inner peripheral surface of the outer tube portion 43 so as to extend in the circumferential direction.

As shown in FIGS. 1 and 2 , a cap ring 48 is connected to the lower end of the outer cylindrical portion 43 and constitutes a known tamper evidence function for certifying the opening/closing history of the lid portion 4 . The cap ring 48 is positioned between the lower end edge of the outer cylinder part 43 and the annular protrusion 22 of the cylinder body part 20 so as to correspond to the position of the ratchet 23 provided on the cylinder body part 20 of the pouring part 2 . and is broken when the lid portion 4 is rotated in the opening direction to open the lid. This indicates that the bag-like container is in an unsealed state.

The pouring part 2 and the lid part 4 are molded from a conventionally known synthetic resin material. Examples of known synthetic resin materials include low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear low-density polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, and ethylene-acrylic acid. Examples thereof include thermoplastic resins such as copolymers, ethylene-methyl acrylate copolymers, and ethylene-propylene copolymers.

As shown in FIG. 2 , the sheet body 5 as a gas barrier sheet is attached from the lower surface 32 a of the lower wall 32 of the mounting portion 30 to the bottom surface 45 a of the bottom wall 45 of the lid body portion 41 . The shape and size of the sheet body 5 are the same as the shape and size of the lower wall 32 of the mounting portion 30, and are attached so as to cover the entire lower surface of the spout 1. As shown in FIG.

The sheet body 5 is composed of a multi-layer structure sheet composed of a plurality of thin-layered sheets. The sheet body 5 includes a base material layer, a gas barrier layer laminated on the lower surface side of the base material layer, and a thermal adhesive layer laminated on the upper surface side of the base material layer. Although the material of the sheet body 5 is not particularly limited, for example, a thermoplastic resin layer such as a polyethylene layer, a polypropylene layer, a polyethylene terephthalate layer, an ethylene vinyl-alcohol copolymer layer, an acrylic layer, an aluminum foil layer, and a ceramic deposited film layer. etc. can be used. 2 to 4, the thickness of the sheet body 5 is exaggerated.

The sheet body 5 is subjected to half-cut processing or poroso processing. The half-cut processing is a processing for forming fine holes, cuts, etc. halfway in the thickness direction of the sheet body 5 . Half-cut processing is processing for forming a large number of fine holes, cuts, or the like in a part of a plurality of layers, for example, a base layer sheet. The poroso process is a process of penetrating and forming a large number of fine holes in the thickness direction of the sheet body 5 . Since the micropores formed by poroso processing have extremely small pore diameters, they can effectively block the permeation of oxygen. By applying half-cut processing or Poloso processing to the sheet body 5, it is possible to realize the ease of tearing when opening the bag-like container while ensuring the oxygen barrier property. The half-cut processing or Poloso processing is applied over the entire surface of the sheet body 5 .

An example of the method of attaching the sheet 5 to the lower surface of the spout 1 will be described below.
The multilayer structure sheet forming the sheet body 5 has a long shape and is arranged in a rolled state. The multi-layered sheet unwound from the roll is bonded to the bottom surface 45a of the lid main body 41 and the bottom surface 32a of the mounting portion 30 through the bonding process and the cutting process.

In the bonding step, first, the multilayer structure sheet is supplied to the production line with the heat-sealable layer facing downward. A plurality of pouring spouts 1 to which the sheet body 5 is not joined are held below the multilayer structure sheet in an upside-down state, that is, in a state in which the lower surface 32a and the bottom surface 45a of the pouring spouts 1 face upward. A receiving jig capable of holding a plurality of spouts 1 is arranged on the receiving jig. Moreover, a thermal welding means having a crimping jig is arranged above the multilayer structure sheet. Then, the crimping jig is lowered to apply pressure to the multilayer structure sheet against the lower surface 32a and the bottom surface 45a of the spout tool 1, thereby joining the multilayer structure sheet to the lower surface 32a and the bottom surface 45a of the spout tool 1. do. The crimping by the crimping jig is preferably performed a plurality of times, for example, twice. By doing so, a high sealing pressure can be applied, and the bonding strength of the multilayer structure sheet can be improved.

In the cutting step, the multi-layered sheet heat-sealed to the lower surface 32a and the bottom surface 45a of the spout 1 is irradiated with a laser along the periphery of the mounting portion 30 of each spout 1 to cut the outer peripheral portion. to cut. After the cutting step, the multi-layer structure sheet is wound up, so that the spout 1 with the sheet body 5 attached remains in the receiving jig. As a result, the pouring spout 1 having the sheet body 5 joined to the lower surface 32a and the bottom surface 45a is obtained.

Next, the operation of the spout tool 1 of this embodiment will be described.
The pouring spout 1 of this embodiment is used by attaching it to the opening of a bag-like container made of synthetic resin by heat sealing.

The pouring spout 1 includes a pouring part 2, a lid part 4, and a sheet body 5. The lid main body part 41 of the lid part 4 is inserted into the cylinder main body part 20 of the pouring part 2 and assembled. there is The lid main body portion 41 is formed in a bottomed cylindrical shape having a bottom wall 45 , and the bottom wall 45 blocks the flow path C in the pipe main body portion 20 of the pouring portion 2 .

Before opening, the lid portion 4 is assembled to the pouring portion 2, and the male thread 21 of the cylinder body portion 20 of the pouring portion 2 and the female thread 47 of the outer cylinder portion 43 of the lid portion 4 are engaged. ing. At this time, the upper end surface of the cylinder main body 20 contacts the lower surface of the flange portion 42 of the lid 4, and the inner peripheral surface of the cylinder main body 20 contacts the outer peripheral surface of the lid main body 41 at the upper part of the cylinder main body 20. It is in contact with the outer peripheral surface of the formed protrusion 46 . As a result, the assembly state of the pouring part 2 and the lid part 4 is stabilized, and the inflow of oxygen through the space between the pouring part 2 and the lid part 4 is suppressed.

On the other hand, in the pouring spout 1, it is conceivable that oxygen permeates from the outer peripheral surface of the cylinder main body 20 and flows into the cylinder main body 20 and the mounting portion 30 in the vertical axis direction. Also, it is conceivable that outside air exists inside the lid main body 41 and tries to flow in through the bottom wall 45 . Furthermore, it is conceivable that oxygen permeates from the outer peripheral surface of the attachment portion 30 and flows into the cylinder main body portion 20 and the attachment portion 30 in the horizontal axis direction.

On the other hand, since the sheet member 5 as a gas barrier sheet is joined from the lower surface 32a of the mounting portion 30 of the pouring portion 2 to the bottom surface 45a of the lid body portion 41, the sheet member 5 blocks the flow of oxygen. be done. In other words, oxygen flowing in the cylinder main body 20 and the mounting portion 30 in the vertical direction and oxygen trying to flow in from the bottom wall 45 are blocked by the sheet body 5 and prevented from flowing into the bag-shaped container. be. Further, since the bag-like container is heat-sealed to the mounting portion 30, the bag-like container blocks the flow of oxygen. That is, the oxygen flowing in the mounting portion 30 in the horizontal direction is blocked by the aluminum foil layer forming the bag-like container, and is prevented from flowing into the bag-like container. Good oxygen barrier property before opening.

The bag-like container is opened as follows. First, the lid portion 4 is rotated to release the engagement between the male screw 21 of the cylinder main body portion 20 and the female screw 47 of the outer cylinder portion 43 . The lid portion 4 moves upward with respect to the pouring portion 2 , and the sheet body 5 joined from the bottom surface 32 a of the mounting portion 30 to the bottom surface 45 a of the lid body portion 41 is pulled upward together with the lid portion 4 .

The sheet body 5 is torn in the shape of the bottom surface 45 a of the lid main body 41 and divided into a portion on the bottom wall 45 side of the lid main body 41 and a portion on the lower wall 32 side of the mounting portion 30 . Since the sheet body 5 is subjected to half-cut processing or poroso processing, it can be torn and divided with a little force. In addition, since a sharp-pointed protrusion 24 having a triangular shape in a side view is formed on the inner peripheral side lower surface of the cylinder main body 20 of the pouring part 2, the sheet body 5 pulled upward is formed with a protrusion 24. The leading edge 24a of the portion 24 is torn. Since the tip edge 24a of the protrusion 24 has a sharp shape that tapers downward, the sheet body 5 can be easily torn with a small amount of force, and the generation of torn pieces is also suppressed.

Further, a gap having a width L1 is formed between the inner peripheral surface of the cylinder body portion 20 and the outer peripheral surface of the lid body portion 41 at the lower surface 32a of the mounting portion 30 and the bottom surface 45a of the lid body portion 41 . The width L1 of the gap is as narrow as about 0.3 to 0.5 mm. Therefore, the presence of the gap makes it easier for the sheet body 5 to be pulled upward, and the tip edge 24 a of the ridge portion 24 is likely to hit the sheet body 5 . Further, since the width L1 of the gap is narrow, the sheet body 5 is prevented from being excessively stretched in the gap, and when it hits the leading end edge 24a of the protrusion 24, it is sharply torn.

As the lid portion 4 rotates, the cap ring 48 that constitutes the tamper-evident function is separated. When the engagement between the male screw 21 and the female screw 47 is completely released, the lid main body 41 is pulled out from the cylinder main body 20 of the pouring part 2, and the lid 4 is removed from the pouring part 2, the pouring spout tool is removed. 1 is opened, and the fluid in the bag-like container can be poured out from the flow channel C of the cylinder main body 20 .

After extracting the fluid from the bag-like container, when closing the cap, the lid body 41 of the lid 4 is inserted into the cylinder body 20 of the dispensing part 2 and the lid 4 is rotated. , the male screw 21 and the female screw 47 are engaged with each other. At this time, since a tapered surface 46a whose diameter decreases toward the bottom is formed at the lower end of the projection 46 formed on the outer peripheral surface of the lid main body 41, the upper end of the cylinder main body 20 is the tapered surface 46a. While being guided by , it smoothly advances through the gap between the outer peripheral surface of the lid body portion 41 and the inner peripheral surface of the outer cylindrical portion 43 .

Next, the effect of the spout tool 1 of this embodiment will be described below.
(1) In the pouring spout tool 1 before opening, the sheet body 5 is attached from the bottom surface of the pouring part 2 to the bottom surface 45a of the lid main body part 41 of the lid part 4 . Therefore, the oxygen that has flowed in from the outer peripheral surface of the cylinder body 20 of the pouring part 2 and the oxygen that has flowed in from the bottom wall 45 of the lid body 41 is suppressed from flowing into the bag-like container. It is possible to obtain a pouring spout 1 having excellent oxygen barrier properties, and to keep the contents in the bag-like container in a good state of preservation before opening.

(2) The sheet body 5 is subjected to half-cut processing or poroso processing. Therefore, not only is it excellent in oxygen barrier properties, but it can also be easily cut. The lid portion 4 can be easily separated only by the force of pulling upward.

(3) A mounting portion 30 protruding in the radial direction is provided at the lower portion of the tube main body portion 20 of the pouring portion 2, and the sheet body 5 extends from the lower surface 32a of the mounting portion 30 to the lid main body portion 41. It is attached over the bottom surface 45a. Therefore, the bonding area of the sheet body 5 is increased, and the bonding strength can be improved.

(4) The mounting portion 30 is composed of a plurality of ribs having a shape protruding radially outward from the outer peripheral surface of the cylinder main body portion 20. 33 have the same shape and size, and their side surfaces are flush with each other in the vertical direction. Further, each side surface is formed as a flat surface without unevenness. Therefore, the bonding strength by heat sealing with the bag-like container is increased, and the opening of the bag-like container can be firmly sealed.

(5) At the positions of the lower surface 32a of the mounting portion 30 and the bottom surface 45a of the lid body portion 41, a gap having a width L1 is formed between the inner peripheral surface of the cylinder body portion 20 and the outer peripheral surface of the lid body portion 41. . Therefore, when the portion of the sheet body 5 attached to the bottom surface 45a of the lid main body 41 is pulled upward, the sheet body 5 is stretched in this gap and hits the ridges 24 of the lower surface 32a of the mounting section 30. easy. The sheet body 5 can be easily torn.

(6) A sharp-pointed ridge portion 24 is formed on the bottom surface of the cylinder main body 20 on the inner peripheral side thereof, and tapers toward the bottom. Therefore, the sheet body 5 hits the leading end edge 24a of the ridge portion 24 and is easily torn. In addition, since the tip edge 24a is sharp and sharp, it is possible to suppress the generation of tear pieces.

(7) The tip edge 24a of the ridge portion 24 is positioned slightly above the bottom surface 32a of the bottom wall 32 of the mounting portion 30 . Therefore, the protrusion 24 is prevented from coming into contact with the sheet body 5 before the cap is opened, and the sheet body 5 is prevented from being torn unintentionally.

(8) The sheet body 5 is adhered to the bottom surface 32 a of the mounting portion 30 and the bottom surface 45 a of the lid body portion 41 . Therefore, when the sheet body 5 is torn at the time of opening, the torn pieces of the sheet body 5 do not remain in the bag-shaped container and are unlikely to become foreign matter.

Note that the above embodiment can be modified as follows. It should be noted that the above embodiment and the following modified examples can be applied in combination with each other within a technically consistent range.
・In the pouring spout 1 of the above embodiment, the length of the lid main body 41 in the vertical direction is the state where the upper end surface of the cylinder main body 20 of the pouring part 2 is in contact with the lower surface of the flange 42 of the lid 4. The bottom surface 45a of the lid main body 41 is set so as to be flush with the lower surface 32a of the mounting portion 30 of the pouring portion 2. As shown in FIG. The length from the bottom surface of the flange portion 42 of the lid body portion 41 to the bottom surface 45a of the bottom wall 45 is not limited to this, as shown in FIG. You may make it slightly longer than the length to. In this way, when the lid portion 4 is attached to the pouring portion 2, the upper end surface of the cylinder main body portion 20 contacts the lower surface of the flange portion 42 of the lid portion 4, and the bottom wall 45 of the lid main body portion 41 pours out. It protrudes downward from the lower surface 32a of the mounting portion 30 of the protruding portion 2 . This projection length L2 is about 0.1 to 0.5 mm.

In this way, if the bottom wall 45 of the lid main body 41 protrudes slightly downward from the lower surface 32a of the mounting portion 30, when the multi-layer structure sheet is crimped and joined, the bottom wall 45a of the lid main body 41 may All sealing pressures can be increased. As a result, the multilayer structure sheet is firmly joined, and the joining strength of the sheet body 5 can be improved.

- As shown in FIG. 4, the bottom surface 45a of the lid main body 41 may be formed with a protrusion 45b projecting downward. The ridge portion 45b is formed in an annular shape concentrically with the lid main body portion 41, and it is preferable that the lower surface thereof is formed in a flat shape. A protrusion length L3 from the bottom surface 45a of the lid main body 41 is about 0.1 to 0.5 mm. When such a protrusion 45b is formed, it is possible to increase the sealing pressure when the multi-layer structure sheet is crimped and joined. As a result, the multilayer structure sheet is firmly joined to the protrusions 45b, and the joining strength of the sheet body 5 can be improved.

- As shown in FIG. 4, the protrusion 45b may be formed so that its outer surface is flush with the outer peripheral surface of the peripheral wall 44 of the lid main body 41, and the inner side of the outer peripheral surface of the peripheral wall 44. It may be formed at any position.

・In the spout 1 of the above embodiment, the inner peripheral surface of the cylinder main body 20 is formed in a straight shape whose diameter does not change in the vertical direction. Although a gap of width L1 is formed, it is not limited to this. The inner diameter of the cylinder body portion 20 may vary in the vertical direction. For example, as shown in the enlarged view of FIG. 4, a protruding portion 25 protruding radially inward may be formed on the inner peripheral surface of the lower end portion of the cylinder body portion 20 to narrow the gap of width L1. . The projecting portion 25 is formed in an annular shape concentrically with the cylinder main body portion 20 and has a square shape when viewed from the side. The inner peripheral surface 25a extends parallel to the outer peripheral surface of the peripheral wall 44 of the lid main body 41. As shown in FIG. As a result, on the lower surface of the pouring spout 1, a gap having a width L4 is formed between the outer peripheral surface of the lid main body 41 and the inner peripheral surface of the cylinder main body 20, which is narrower than the portion where the projecting portion 25 is not formed. be. By forming the projecting portion 25 in this way, the width L4 of the gap may be narrowed. When the width L4 of the gap is narrow, the sheet body 5 can be torn with less force when unsealing. In addition, the generation of torn pieces can be suppressed. In addition, the shape of the projecting portion 25 is not limited to a rectangular shape when viewed from the side, and may be appropriately changed to a triangular shape when viewed from the side, a trapezoidal shape when viewed from the side, or the like.

- The entire lower surface of the pouring portion 2 may be flat without forming the ridge portion 24 on the lower surface of the tube main body portion 20 of the pouring portion 2 .
- As shown in FIG. 5(a), the ridge portion 24 is formed in an annular shape concentrically with the tubular main body portion 20, but it is not necessarily formed in an annular shape. For example, as shown in FIG. 5(b), the protrusion 24 may be formed in a part of the annularly formed stepped portion 24b. That is, it may be formed as a part of an annular arc having the same center as that of the tube body portion 20 . Also, one or more short arcuate protrusions 24 may be formed. Furthermore, as shown in FIG. 5(c), one or more thin rod-shaped sharp-pointed projecting portions 24c may be formed on the stepped portion 24b.

- The pouring part 2 does not have to have the mounting part 30 . In this case, the pouring part 2 is formed of a cylindrical main body part 20 , and the opening of the bag-like container is heat-sealed to the lower part of the main body part 20 . Further, the sheet body 5 is attached from the lower surface of the cylinder main body portion 20 of the pouring portion 2 to the bottom surface 45 a of the lid main body portion 41 .

- The shape of the mounting portion 30 is not limited to that of the above embodiment. Although the shape elongated in the left-right direction increases the adhesive strength by heat sealing, the shape is not necessarily elongated and may be circular in plan view.

- The attachment part 30 is not limited to what is formed of a plurality of ribs. For example, it may be formed as one surface having a larger diameter than the outer diameter of the cylinder body portion 20 .
- The upper wall 31, the lower wall 32, and the intermediate wall 33 of the mounting portion 30 do not have to have the same shape and size. For example, top wall 31 may be the largest and intermediate wall 33 may be the largest. Also, the number of intermediate walls 33 is not particularly limited.

- The side surfaces of the upper wall 31, the lower wall 32, and the intermediate wall 33 of the mounting portion 30 are not limited to flat surfaces. It may be a surface having unevenness.
- The shape of the annular protrusion 22 formed on the outer peripheral surface of the vertically intermediate portion of the tube body portion 20 of the pouring portion 2 is not particularly limited. For example, it may be circular or hexagonal. Also, the annular protrusion 22 may not be formed.

- The ratchet 23 may not be formed on the cylinder main body 20 . Also, the tamper evidence function as in the above embodiment may not be provided.
- The lid body portion 41 of the lid portion 4 may be solid. Further, the upper end portion of the hollow lid body portion 41 may be closed.

- The inner peripheral surface of the peripheral wall 44 of the lid main body 41 is formed in a straight shape whose diameter does not change in the vertical direction, but is not limited to this. The inner diameter may be changed by, for example, forming a tapered surface on the inner peripheral surface of the peripheral wall 44 .

- The outer peripheral surface of the peripheral wall 44 of the lid main body 41 is formed in a straight shape in which the diameter does not change in the vertical direction except for the protrusion 46, but it is not limited to this. The outer diameter may be changed by, for example, forming a tapered surface on the outer peripheral surface of the peripheral wall 44 .

- As shown in the enlarged view of FIG. A plurality of protrusions 49 may be formed along the outer peripheral surface of the peripheral wall 44, or may be formed as ridges extending along the outer peripheral surface. Moreover, it may be formed at a plurality of locations in the vertical direction of the peripheral wall 44 . The protruding length of the projection 49 is smaller than the width L1 between the outer peripheral surface of the peripheral wall 44 and the inner peripheral surface of the cylinder body portion 20 . The formation of the projection 49 prevents the lid 4 from being distorted and inserted into the spout 2 . In addition, the outer peripheral surface of the lid body portion 41 and the inner peripheral surface of the cylinder body portion 20 are less likely to come into contact with each other, thereby suppressing difficulty in opening the lid portion 4 due to frictional resistance.

- The protrusion 46 formed on the outer peripheral surface of the peripheral wall 44 of the lid main body 41 has a tapered surface 46a formed at the lower end thereof, but the shape thereof is not limited to this. For example, the upper end portion may be formed with a tapered surface whose diameter decreases upward.

The bottom surface 45a of the bottom wall 45 of the lid main body 41 is formed as a flat surface that is horizontal in the left-right direction and has no irregularities, but is not limited to this. For example, a gate may be provided on the bottom surface 45a to form irregularities.

- The outer cylindrical portion 43 of the lid body portion 41 does not have to be cylindrical. For example, the outer peripheral surface may be elliptical in top view, hexagonal in top view, or the like.
- The shape and size of the sheet body 5 need not be the same as the shape and size of the lower wall 32 of the mounting portion 30, and can be changed as appropriate.

- The method of attaching the sheet body 5 does not have to be based on the adhesion process as in the above embodiment. For example, the multilayer structure sheet may be adhered from below with the lower surface 32a and the bottom surface 45a of the spout 1 facing downward. Alternatively, a multi-layer structure sheet in a sheet state may be adhered to each of the spout tools 1 .

- In the above-described embodiment, in the cutting step, the multilayer structure sheet is irradiated with a laser along the peripheral edge of the mounting portion 30 of each spout 1, but the present invention is not limited to this. For example, it may be cut with a knife.

The bag-shaped container of the above embodiment is formed of a multilayer structure sheet in which an aluminum foil layer is laminated between multiple layers of thin polyethylene sheets, but the configuration and material are not limited to this.

- The pouring spout 1 does not have to be adhesively fixed to the opening of the bag-like container by heat sealing. The method of fixing the spout 1 can be appropriately changed to a method other than heat sealing.
- The spout tool 1 can be applied not only to a bag-like container made of synthetic resin but also to various containers. In this case, the mounting portion 30 can be appropriately modified in accordance with the shape of the container, for example, to have a simple flange shape.

Next, technical ideas that can be grasped from the above embodiment and modifications will be described below.
(a) A pouring spout that is attached to an opening of a container that contains a fluid therein, wherein a cylindrical spout that forms a flow path for the fluid and a spout that is screwed together with the spout. a lid portion detachably attached to the outlet portion, the lid portion having a bottomed cylindrical lid body portion to be inserted into the pouring portion; A gas barrier sheet is attached to the bottom surface of the lid main body, and a projecting portion as a cutting portion sharpened downward is provided on the lower surface of the inner peripheral side of the pouring portion. According to this configuration, the gas barrier sheet is easily torn by contact with the leading edge of the protrusion. In addition, since the tip edge is sharp and sharp, it is possible to suppress the generation of tear pieces.

C... Flow path 1... Spout tool 2... Spout part 4... Lid part 5... Sheet body (gas barrier sheet)
20... Cylinder main body 30... Mounting part 32a... Bottom surface 41... Lid main body part 45... Bottom wall 45a... Bottom surface 45b... Ridge part

Claims (5)

A spout attached to an opening of a container containing a fluid therein,
a cylindrical pouring portion forming the flow path of the fluid; and a lid portion detachably attached to the pouring portion by screwing the pouring portion,
The lid portion has a bottomed cylindrical lid body portion inserted inside the pouring portion,
A gas barrier sheet is attached from the lower surface of the spout portion to the bottom surface of the lid main body,
The gas barrier sheet is half-cut or poloso-processed ,
An annular stepped portion recessed upward is formed on the lower surface of the inner peripheral side of the pouring portion,
A pouring spout , wherein the stepped portion is formed with a sharp-pointed projected ridge that is triangular in cross section and tapers downward from the upper surface of the stepped portion . The pouring portion includes a cylindrical main body portion and a mounting portion integrally connected to a lower portion of the main body portion and projecting radially from the main body portion,
2. The spout according to claim 1, wherein the gas barrier sheet is attached from the lower surface of the attachment portion to the bottom surface of the lid body. 3. The pouring spout according to claim 2, wherein the bottom surface of the lid main body protrudes downward from the bottom surface of the mounting portion. A ring-shaped ridge protruding downward is formed on the bottom surface of the lid main body at a position near the outer periphery thereof, and the lower surface of the ridge is formed flat. Item 2. The spout tool according to item 2. A gap is formed between the inner peripheral surface of the pouring portion and the outer peripheral surface of the lid main body at the lower surface of the pouring portion and the bottom surface of the lid main body. 5. The spout tool according to any one of 4.

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