JP2023147310A - Spout for carton - Google Patents

Abstract

To provide the spout for a carton having an overrun-proof upper lid and improved in sealability and opening/closing operability.SOLUTION: The spout for a carton has bridge breaking means between an inner plug stem 5 and a TE band 29, and an overrun preventive structure between the inner plug stem 5 and an upper lid 3. The overrun preventive structure is formed of a first upper lid hooking part 3c provided on an opening edge end face of the upper lid 3 and a TE band falling preventive part 8. When the upper lid plug is closed, the first upper lid hooking part 3c abuts on an end face 8a around an inner plug axial center of the TE band falling preventive part 8 around an upper lid axial center, and the TE band falling preventive part 8 receives the upper lid at a part around the upper lid axial center.SELECTED DRAWING: Figure 1

Description

The present invention relates to a carton spout provided in a carton made of a material such as paper.

Conventionally, there is a carton spout described in Patent Document 1, for example. This is a plug made of plastic resin that is attached to a liquid paper container and consists of a spout and a cap. The resin constituting the spout has polyethylene resin as its main component, and contains 5% by weight or more of biomass polyethylene resin.

The spout is provided with an external thread on its outer surface, and is provided with a sealing plate for sealing the opening and a first engaging portion connected to the sealing plate on its inner surface. The sealing plate is connected to the inner surface of the spout via the circumferential thin wall portion. The cap is provided with an internal thread that engages with the external thread of the spout, and a second engagement part that engages with the first engagement part, so that when the external thread and the internal thread are unscrewed, , the first engaging part and the second engaging part are engaged, the sealing plate is rotated together with the cap, and the circumferential thin part is broken.

Moreover, what is described in Patent Document 2 is a spout plug including a spout body and a cap. The inner ring of the cap has a first region having a first outer diameter and a second region having a second outer diameter on its outer peripheral surface. The side wall of the spout body has a first region having a first inner diameter and a second region having a second inner diameter on the inner circumferential surface. When the cap is screwed onto the spout body, the first region of the inner ring and the first region of the side wall of the spout body are in close contact with each other over the entire circumference, and the second region of the inner ring and the spout body are in close contact with each other over the entire circumference. and the second region of the side wall are in close contact with each other over the entire circumference. A region where the first region of the inner ring and the first region of the side wall of the spout body are in close contact with each other, and a region where the second region of the inner ring and the second region of the side wall of the spout body are in close contact with each other. There is a space in between.

JP2020-189641 JP2019-34790

A carton spout generally has a structure in which an inner stopper having an opening for dispensing is attached to the carton, and a top cover that closes the opening of the inner stopper is screwed to the inner stopper. In this structure, if the top lid is tightened too much and overruns, there will be a problem in the fitting of the screws of the top lid and the inner stopper, making it impossible to ensure sealing performance, resulting in a problem that the sealing performance will be impaired.

The present invention solves the above problems, and aims to provide a carton spout that prevents overrun of the top lid, improves sealing performance, and improves operability when opening and closing. shall be.

In order to achieve the above object, the carton spout according to the present invention includes an inner stopper attached to the carton, a top cover attached to the inner stopper, and a TE band forming an annular shape around the axis of the top cover, and the inner stopper includes: It has a threaded cylinder on one side in the direction of the inner stopper axis, an inner stopper base on the other side, and an inner stopper opening that penetrates in the inner stopper axis direction. The TE band drop-off prevention part is provided intermittently along the TE band, the TE band drop-off prevention part faces the inner peripheral surface of the band in the band radial direction, the threaded tube has a male threaded part on the outer peripheral surface, and the upper lid , having a female threaded part on the inner circumferential surface, the female threaded part being threadedly connected to the male threaded part of the threaded cylinder, having a knurling on the outer circumferential surface, and having a sealing means between the inner plug opening and the upper cover, The TE band is connected via a bridge to the opening edge end surfaces of the upper lid that face each other in the axial direction of the upper lid, has a bridge breaking means between the inner plug base and the TE band, and has an overrun between the inner plug base and the upper lid. The overrun prevention structure consists of a top lid catch part and a TE band drop-off prevention part provided on the end surface of the opening edge of the top lid. It is characterized in that the TE band fall-off prevention part contacts the end face around the axis of the inner plug and receives the top lid around the axis of the top lid.

In the carton pouring spout according to the present invention, the TE band fall-off prevention part rises in the axial direction of the inner plug from the outer surface of the inner plug base, and the tip protrudes outward in the radial direction of the inner plug, so that the TE band falls off after the bridge is broken. It is characterized by having a shape that interlocks with the .

The carton spout according to the present invention has a stopper structure between the top lid and the TE band, and the stopper structure is an abutment stop provided on the top surface of the TE band that faces the opening edge end surface of the top lid in the axial direction of the top lid. and a second top lid catch part provided on the opening edge end surface of the top lid, and when the top lid and TE band are attached to the inner stopper during the manufacturing process, the second top lid catch part engages with the stopper part around the top lid axis. This feature prevents the bridge from breaking.

In the carton spout according to the present invention, the knurling is composed of a plurality of plate-like protrusions arranged radially around the upper lid axis, and the plate-like protrusions are spaced apart from each other around the upper lid axis to form a finger grip. , each plate-like protrusion extends radially outward of the upper lid to form the outermost diameter of the upper lid.

In the carton spout according to the present invention, the bridge breaking means has a ratchet structure, and the ratchet structure consists of a plurality of ratchet claws provided on the outside of the inner plug base and a plurality of ratchet teeth provided on the inner peripheral surface of the band of the TE band. It is characterized by becoming.

In the carton pouring spout according to the present invention, the TE band is characterized in that it has a temporary carton holding portion on the outer peripheral surface of the band that is radially outward from the outermost diameter of the top lid.

In the carton pouring spout according to the present invention, the sealing means between the inner plug opening and the upper lid is formed at the nozzle opening forming the inner plug opening in the nozzle tube formed inside the screw cylinder and on the inner top surface of the upper lid. and is characterized by comprising an inner ring inserted into the nozzle opening.

With the above configuration, when the top lid is closed, the top lid hook comes into contact with the end face of the TE band drop-off prevention part and receives the top lid around the top lid axis, thereby preventing overrun of the screw connection between the top lid and the inner stopper. This prevents the upper lid from being over-tightened, and also reduces the user's effort by notifying the user that the optimum tightening position has been reached. As a result, there is no possibility that the sealing performance will be impaired due to defects in the screw connection.

Furthermore, the overrun prevention structure can be realized with a simple structure by using the TE band drop-off prevention part, which is intended to prevent the TE band from falling off after the bridge is broken, as a component of the overrun prevention structure.

Moreover, the stopper structure can reduce the burden on the bridge when attaching the top cover to the inner stopper in the manufacturing process, and it is possible to attach the top cover to the inner stopper without breaking the bridge.

The radial plate-like protrusions of the knurling form the outermost diameter of the top lid and form a fingerhold, increasing the torque applied to the top lid around the axis, allowing the top lid to be attached and removed when opening and closing after opening. Easy to operate.

By making the bridge breaking means have a ratchet structure, it is possible to reduce the burden on the bridge when attaching the top lid to the inner stopper, and to easily break the bridge when opening the cap.

By forming the temporary holding portion on the outer peripheral surface of the TE band, the diameter of the TE band can be increased, and the visibility of the TE band can be improved.

The sealing means consists of a nozzle opening of the nozzle tube formed inside the threaded tube and an inner ring inserted into the nozzle opening, so even if the screw tube is deformed during opening and closing operations, the deformation of the screw tube will not affect the nozzle tube. Therefore, sealing can be achieved more reliably without affecting sealing.

A sectional view showing a carton spout according to an embodiment of the present invention A front view showing the top cover of the carton spout according to the embodiment A lower perspective view showing the top lid after opening the carton spout of the top lid according to the same embodiment. A top view showing the top cover of the carton spout according to the embodiment An upper perspective view showing the top cover of the carton spout according to the embodiment A lower perspective view showing the top cover of the carton spout according to the embodiment A sectional view showing the inner stopper of the carton spout according to the embodiment An upper perspective view showing the inner stopper of the carton spout according to the embodiment A front view showing the inner stopper of the carton spout according to the embodiment A top view showing the inner stopper of the carton spout according to the embodiment An upper perspective view showing an upper cover of a carton spout according to another embodiment of the present invention A lower perspective view showing the top cover of the carton spout according to the embodiment An upper perspective view showing a top cover of a carton spout according to still another embodiment of the present invention A lower perspective view showing the top cover of the carton spout according to the embodiment

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a carton spout according to the present invention will be described with reference to FIGS. 1 to 10.
(Example 1)
1 to 10, the carton spout according to the present invention has a scoreless cap and includes an inner stopper 2 that is attached to a carton 1 made of paper or the like, and an upper lid 3 that is attached to the inner stopper 2. In the unopened state shown in FIGS. 1 to 10, the upper lid 3 integrally holds a TE band 29, which will be described later, via a bridge 30.

The inner plug 2 has a threaded tube 4 on one side in the axial direction of the inner plug, and an inner plug base 5 on the other side, has a nozzle tube 6 inside the screw tube 4, and penetrates in the axial direction of the inner plug, It has an inner plug opening 7 that communicates the inside of the carton 1 with the outside.

The inner stopper base 5 has an annular base part 5a on one side following the threaded cylinder 4, and a flange part 5b on the other side that engages the carton 1, and has a plurality of ratchet pawls, four in this case, on the outer peripheral surface of the base part 5a. It has 5c. The plurality of ratchet pawls 5c are provided at equal intervals around the axis of the inner plug.

Moreover, the inner plug base 5 has TE band fall-off prevention parts 8 provided intermittently along the inner plug axis on the outer surface of the base part 5a. Here, a pair of TE band drop-off prevention parts 8 are provided at symmetrical positions with respect to the center plug axis, and each TE band drop-off prevention part 8 is provided within a range of 90 degrees around the center plug axis. The missing part between the TE band drop-off prevention parts 8 forms a drainage channel for water entering from the outside.

Further, the TE band drop-off prevention part 8 rises from the outer surface of the base part 5a in the axial direction of the inner plug, faces the band inner circumferential surface 29a in the band radial direction, and has a tip 8b protruding outward in the inner plug radial direction. , forms an undercut shape that engages the TE band 29 after the bridge is broken. Further, the end surface 8a of the TE band fall-off prevention part 8 around the center axis of the inner plug comes into contact with a first upper lid catch part 3c, which will be described later, when the upper lid is closed after the bridge is broken.

The threaded cylinder 4 has a male threaded part 9 on the outer peripheral surface, the nozzle cylinder 6 has a nozzle opening 10 forming an inner plug opening 7, and the inner periphery of the threaded cylinder 4 on the outer periphery of the inner plug base side. It has a connecting portion 11 that continues to the surface.

The upper lid 3 has a large knurling 50 on its outer peripheral surface. The knurling 50 consists of a plurality of plate-like protrusions 51, here 12, arranged radially around the upper lid axis, and the plate-like protrusions 51 are spaced apart from each other around the upper lid axis to form a fingerhold, Each of the plate-like protrusions 51 extends radially outward of the upper lid 3 to the outer peripheral edge of the collar portion 3a, forming the outermost diameter of the upper lid, and forming an input portion 52 for increasing the torque applied to the upper lid 3 around the axis.

Further, the flange 3a of the upper lid 3 has an annular shape around the axial center of the upper lid along the opening edge, and the opening edge end surface 3b of the flange 3a faces the band upper surface 29b of the TE band 29 in the axial direction of the upper lid. . The opening edge end face 3b is provided with a plurality of first upper lid hooking parts 3c, here a pair of first upper lid hooking parts 3c at symmetrical positions with respect to the upper lid axis, and further with second upper lid hanging parts 3d at symmetrical positions with respect to the upper lid axis. The first upper lid hooking portion 3c and the second upper lid hooking portion 3d are separated from each other by 90 degrees around the upper lid axis.

The first upper lid hooking part 3c has a shape that extends inward in the upper lid radial direction and can come into contact with the end surface 8a of the TE band drop-off prevention part 8, and the second upper lid hooking part 3d is a stopper for the TE band 29, which will be described later. It has a shape that can be brought into contact with 29d.

Furthermore, the upper lid 3 has a female threaded part 12 on its inner peripheral surface that is screwed to the male threaded part 9 of the threaded cylinder 4, and a first inner ring 13 to be inserted into the nozzle opening 10 and a threaded cylinder on its inner top surface. It has a second inner ring 14 that is inserted inside the inner ring 4. The female threaded portion 12 of the top lid 3 has threads 15 intermittently formed around the three axes of the top lid, and the missing portions of the threads 15 form a drainage path 16 for external water intrusion.

The second inner ring 14 has an end surface 17 at one end in contact with the connecting portion 11 of the nozzle tube 6 in the axial direction of the upper lid, and an outer circumferential surface 19 at one end in contact with the inner circumferential surface 20 of the threaded tube 4. The deformation suppressing portion 21 is formed by the deformation suppressing portion 21 .

The first inner ring 13 contacts the inner peripheral surface 22 of the nozzle opening 10 to form an innermost seal portion 23 . The second inner ring 14 has an end surface 17 at one end in contact with the connecting portion 11 of the nozzle tube 6 to form an intermediate seal portion 24, and an outer circumferential surface 19 at one end in contact with the inner surface of the threaded tube 4. An outermost seal portion 25 is formed. Therefore, between the outside of the top lid 3 and the inside of the inner stopper 2, a sealing structure consisting of multiple seal parts exists.

In addition, since the sealing means consists of the nozzle port 10 of the nozzle tube 6 formed inside the threaded tube 4 and the first inner ring 13 inserted into the nozzle port 10, the screw tube 4 can be deformed during opening and closing operations. Since the deformation of the threaded tube 4 does not affect the nozzle tube 6, sealing is not affected, and sealing can be achieved more reliably.

Further, the nozzle tube 6 has a pointed shape and has a straight tube portion 26 that forms the nozzle opening 10 and a conical skirt portion 27 that continues from the connecting portion 11 to the straight tube 26. It has a thin easily deformable portion 28 that can be easily deformed inward in the radial direction. Further, the upper lid 3 holds, via a bridge 30, an annular TE band 29 that fits around the outer periphery of the inner plug base 5 on the opening side.

The TE band 29 has a plurality of temporary holding parts 32 that protrude outward in the band radial direction and engage with the surface side of the carton 1 on the band outer circumferential surface 29c located radially outward from the outermost diameter of the top lid. The temporary holding parts 32 are provided at appropriate intervals on the band outer peripheral surface 29c. Further, a plurality of abutting portions 29d, in this case a pair, are provided on the band upper surface 29b to protrude in the direction of the upper lid axis, and the abutting portions 29d are provided at symmetrical positions with respect to the band axis. Further, a plurality of ratchet teeth 29e are provided on the inner peripheral surface 29a of the band at appropriate intervals in the circumferential direction, and the ratchet teeth 29e engage with the ratchet pawl 5c of the inner cap base 5 in the opening direction around the axis of the upper lid 3. Configure the ratchet structure.

The operation of the above configuration will be explained. According to the carton pouring spout according to the present invention, the ratchet structure in which the ratchet teeth 29e and the ratchet pawls 5c engage constitutes a bridge breaking means, so that the bridge 30 can be easily broken when the carton is opened.

Further, an overrun prevention structure is provided between the inner plug base 5 and the upper lid 3, which is composed of a first upper lid hooking part 3c provided on the opening edge end surface 3b of the upper lid 3 and a TE band drop-off prevention part 8. That is, when the top lid is closed, the first top lid hanging part 3c comes into contact with the end surface 8a of the TE band drop-off prevention part 8 around the top lid axis, and the TE band drop-off prevention part 8 receives the top lid 3 around the top lid axis, so that the top lid is closed. 3 and the inner stopper 2 from overrunning, it prevents the upper lid 3 from being over-tightened, and also reduces the user's effort by notifying the user that the optimum tightening position has been reached. can. As a result, there is no possibility that the sealing performance will be impaired due to defects in the screw connection.

Furthermore, by using the TE band drop-off prevention section 8, which is intended to prevent the TE band 29 from falling off after the bridge is broken, as a component of the overrun prevention structure, the overrun prevention structure can be realized with a simple structure.

Furthermore, a stopper structure is provided between the upper lid 3 and the TE band 29, which is composed of an abutting portion 29d of the TE band 29 and a second upper lid catch portion 3d of the upper lid 3. That is, when the top lid 3 is attached to the inner stopper in the manufacturing process, the second top lid catch portion 3d engages with the stopper portion 29d around the top lid axis, thereby preventing the bridge 30 from breaking.

In addition, the radial plate-like protrusion 51 of the knurling 50 forms the outermost diameter of the upper lid 3 and forms a finger grip, which increases the torque applied to the upper lid 3 around the axis, and increases the torque applied to the upper lid 3 during and after opening. The top cover can be easily attached and detached when opening and closing.

Furthermore, since the outer circumferential surface 19 at the tip of one side of the second inner ring 14 comes into contact with the inner circumferential surface 20 of the threaded tube 6, the force acting on the threaded tube 4 inward in the radial direction when tightening the upper cover 3 is suppressed. The second inner ring 14 acts as a backup and prevents the threaded cylinder 6 from deforming.

As a result, the sealing performance is not impaired due to a problem in the screw connection between the female threaded portion 12 of the top lid 3 and the male threaded portion 9 of the inner plug base 3.

Since the nozzle tube 6 has the thin easily deformable portion 28, the male screw portion 9 that becomes an undercut during molding can be easily released from the mold. That is, by deforming the nozzle tube 6 at the thin-walled easily deformable portion 28, the threaded tube 4 is allowed to deform inward in the radial direction, and damage to the male screw 9 during mold release can be prevented.

By providing a sealing structure consisting of multiple seal parts between the outside of the top lid 3 and the inside of the inner stopper 2, sealing performance is improved.
(Example 2)
In the second embodiment, as shown in FIGS. 11 and 12, the radius of the flange 3a of the upper lid 3 is made smaller than the outermost diameter of the knurling 50, so that the band of the TE band 29 is formed between the plate-like protrusions 51. The visibility of the TE band 29 is improved by exposing the upper surface 29b. Other effects are the same as those of the first embodiment, and their explanation will be omitted.
(Example 3)
In the third embodiment, as shown in FIGS. 13 and 14, the knurling 50 formed on the upper lid 3 includes eight plate-shaped protrusions 51. Similarly to the second embodiment, by making the radius of the flange 3a of the upper lid 3 smaller than the outermost diameter of the knurling 50, the band upper surface 29b of the TE band 29 is exposed between the plate-like protrusions 51, and the TE band 29 visibility is improved. Other effects are the same as those of the first embodiment, and their explanation will be omitted.

1 Carton 2 Inner plug 3 Upper lid 3a Flange 3b Opening edge end surface 3c First upper lid hooking portion 3d Second upper lid hooking portion 4 Threaded cylinder 5 Inner plug base 5a Base portion 5b Flange portion 5c Ratchet pawl 6 Nozzle cylinder 7 Inner plug opening hole 8 TE band drop-off prevention part 8a End face 8b Tip part 9 Male thread part 10 Nozzle port 11 Connection part 12 Female thread part 13 First inner ring 14 Second inner ring 15 Thread 16 Drain channel 17 End face 19 Outer peripheral surface 20 Inner peripheral surface 21 Deformation suppressing part 22 Inner peripheral surface 23 Innermost seal part 24 Intermediate seal part 25 Outermost seal part 26 Straight cylinder part 27 Hem part 28 Easily deformable part 29 TE band 29a Band inner peripheral surface 29b Band upper surface 29c Band outer peripheral surface 29d Stopper Part 29e Ratchet tooth 30 Bridge 32 Temporary holding part 50 Knurling 51 Plate-shaped projection 52 Input part

Claims (7)

Equipped with an inner stopper that is attached to the carton, a top cover that is attached to the inner stopper, and a TE band that forms a ring around the axis of the top cover,
The inner plug has a threaded cylinder on one side in the axial direction of the inner plug, an inner plug base on the other side, and an inner plug opening that penetrates in the inner plug axial direction,
The inner plug base has a TE band drop-off prevention part provided intermittently along the inner plug axis on the outside, and the TE band drop-off prevention part faces the inner peripheral surface of the band in the band radial direction. , has a male thread on the outer circumferential surface,
The upper cover has a female threaded part on the inner peripheral surface, the female threaded part is threadedly connected to the male threaded part of the threaded cylinder, and has a knurling on the outer peripheral surface,
It has a sealing means between the inner plug opening and the upper lid,
The TE band is connected via a bridge to the end surfaces of the opening edges of the upper lid facing each other in the axial direction of the upper lid,
It has a bridge breaking means between the inner stopper base and the TE band,
There is an overrun prevention structure between the inner stopper base and the top lid, and the overrun prevention structure consists of a top lid catch part and a TE band fall prevention part provided on the end surface of the opening edge of the top lid, and when the top lid is closed, the top lid catch part is A spout for a carton, characterized in that the TE band fall-off prevention part abuts an end face around the center plug axis around the axis, and the TE band fall-off prevention part receives the top lid around the top lid axis. The TE band fall-off prevention part is characterized by having a shape that rises from the outer surface of the inner plug base in the inner plug axial direction, a tip portion protrudes outward in the inner plug radial direction, and engages with the TE band after the bridge is broken. The carton spout according to claim 1. A stopper structure is provided between the top cover and the TE band, and the stopper structure includes an abutting part provided on the top surface of the TE band that faces the end surface of the opening edge of the top cover in the axial direction of the top cover, and a stopper structure provided on the end surface of the opening edge of the top cover. It consists of a second upper lid hook,
Claim 1 or 2, characterized in that when the upper lid and the TE band are attached to the inner stopper in the manufacturing process, the second upper lid hook part engages with the stopper part around the upper lid axis to prevent the bridge from breaking. Pour spout for the carton shown. The knurling consists of a plurality of plate-like protrusions arranged radially around the axis of the upper lid, and the plate-like protrusions are spaced apart from each other around the axis of the upper lid to form a fingerhold, and each plate-like protrusion extends in the radial direction of the upper lid. The spout for a carton according to any one of claims 1 to 3, wherein the spout extends outward to form the outermost diameter of the top lid. From claim 1, wherein the bridge breaking means has a ratchet structure, and the ratchet structure includes a plurality of ratchet pawls provided on the outside of the inner plug base and a plurality of ratchet teeth provided on the inner peripheral surface of the band of the TE band. 4. The carton pouring spout according to any one of 4. The carton spout according to any one of claims 1 to 5, wherein the TE band has a temporary carton holding part on the outer peripheral surface of the band that is radially outer than the outermost diameter of the upper lid. . The sealing means between the inner plug opening and the upper lid includes a nozzle opening forming the inner plug opening in a nozzle tube formed inside the threaded cylinder, and an inner ring formed on the inner top surface of the upper lid and inserted into the nozzle opening. The carton pouring spout according to any one of claims 1 to 6, characterized in that the spout comprises:

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