JP6217224B2 - Seal member and filling device - Google Patents

Description

  The present invention relates to a filling device and a sealing member for a filling port of the filling device, and more particularly, to a sealing member for sealing a foaming solution filling device and a container, and a filling device including the sealing member.

  A rotary filling device is used as a device for filling a container with a carbon dioxide-containing beverage. The container is filled with a carbonated beverage as a filling liquid through a filling valve provided in the rotary filling device. Prior to the filling of the carbonated beverage into the container held in the rotary filling device, the air in the container is replaced with carbon dioxide.

  Since carbon dioxide gas needs to be blown into the container at a pressure higher than atmospheric pressure, the opening (opening) of the container needs to be sealed (sealed) so that the inside of the container and the outside air are blocked. . For this reason, for example, as described in Patent Document 1, usually, a rubber bottle packing as a sealing member is provided at the lower portion of the filling valve, and this is in contact with the mouth of the container. The container is sealed with a force capable of withstanding the pressure of carbon dioxide gas. And after the inside of a container is filled with carbon dioxide, the carbonated beverage which is the contents is filled. Even at this time, the sealing is continued because of the pressure of carbon dioxide gas. And after completion | finish of filling of carbonated drink, the valve | bulb with which a filling valve is equipped opens, the carbon dioxide gas in the head space of a container is open | released, and the inside of a container is made into atmospheric pressure. At this point, the seal is released.

  On the other hand, as a filling device for beverages such as carbonated beverages, a rotary type is common. The filling valve of the rotary filling device is provided on the outer peripheral portion of the rotating disk, and the carbonated beverage is filled into the container from the filling valve while the disk rotates almost once. The liquid carbonated beverage filled into the container that rotates together with the filling valve is shaken outwardly in the radial direction of the disk under the influence of centrifugal force. For this reason, the liquid does not fall to the center of the container, but falls by swinging outward in the radial direction of the disk.

  The container used for filling the carbonated beverage is provided with irregularities around the bottom so that the bottom does not deform due to the pressure of carbon dioxide gas. When the carbonated beverage falls on the uneven portion, the liquid rises and entrains air, resulting in large foaming. When a predetermined amount of carbonated beverage is filled in a state where large foaming has occurred, bubbles are blown out from the container, leading to insufficient filling. In order to suppress the occurrence of foaming, it is necessary to reduce the filling flow rate of the carbonated beverage or reduce the rotation speed of the filling device, resulting in a reduction in production capacity.

  Various filling devices that prevent the carbonated beverage filled in the container from directly striking the uneven portions around the bottom of the container to generate foam have been proposed (Patent Documents 2 to 4).

  In the rotary filling device of Patent Literature 2, the carbonated beverage discharged from the nozzle is balanced with the centrifugal force of the disc by inclining the filling valve or the nozzle at the lower end of the filling valve toward the rotation center side of the disc. It is controlled to fall to the center of the container. Further, in the third embodiment of Patent Literature 2, the rotary filling device of Patent Literature 3, and the rotary filling device of Patent Literature 4, the container is inclined with respect to the filling valve extending in the vertical direction. In any of these apparatuses, the mouth portion of the container is in contact with a bottle mouth packing provided at the lower portion of the filling valve.

  Repeated contact of the mouth of the container with the bottle mouth packing causes a load on the bottle mouth packing and shortens the service life of the bottle mouth packing. For this reason, the countermeasure which makes it unnecessary to touch the opening part of a container with the bottle mouth packing is also considered. Patent Document 5 proposes a method in which a seal packing of a filling valve is brought into contact with a neck ring portion of a container and carbon dioxide gas is blown and contents are filled while sealing. However, in this method, the seal is not perfect, gas outflow may occur and the filling may be hindered, and it is hardly adopted.

JP 2006-160340 A JP 2006-248547 A JP 2008-265851 A JP 2012-071857 A JP 2010-042832 A

  In order to reliably fill the container with the foamable solution, it is necessary to hold a sealing member made of, for example, rubber against the bottle mouth of the container and hold the container with a force that does not allow gas to leak from the contacting portion.

  However, for example, when a container made of polyethylene terephthalate is used, the bottle opening of the container formed by injection molding is relatively hard, and the rubber of the sealing member that comes into contact tends to wear as the filling frequency increases. In addition, the amount of polyethylene terephthalate resin used is decreasing, which reduces the area of the top surface of the bottle mouth and increases the amount of wear as the force of the seal member against the rubber becomes relatively strong.

  Furthermore, in the case of a foamable solution, due to the structure of the bottom of the container, the container and the filling valve are tilted so that the foamable solution falls to the center part, so that the seal member and the bottle opening are in parallel. The contact of the seal member may be promoted without contact.

These increase the frequency of replacement of the seal member, and reduce the production efficiency. Therefore, when filling the foamable solution into a container made of polyethylene terephthalate or the like, it is necessary to suppress the wear of the seal member in contact with the bottle opening and to extend the replacement time of the seal member.
Then, the objective of this invention is providing the filling apparatus provided with the sealing member excellent in durability, and the sealing member excellent in durability.

In order to solve the above problems, the sealing member of the present invention is a sealing member that abuts against the opening end of the container and seals the container when the container is filled with the foamable solution.
The sealing member may have a recess of annular shape corresponding to the open end, the width of the recess is 1.2 to 5.0 times the width of the thickness of the open end, the depth of the recess It is characterized der Rukoto than 2.0mm or less 30 [mu] m.

  Furthermore, the effervescent solution is a beverage containing carbon dioxide gas.

  Further, the width of the recess is 1.2 to 5.0 times the width of the thickness of the opening end.

  Furthermore, the depth of the recess is 30 μm or more and 2.0 mm or less.

  Further, the seal member is characterized by being made of any one of a rubber made of an ethylene-propylene copolymer, an acrylonitrile copolymer rubber, a silicon rubber, a fluorine rubber, or a combination thereof.

  Furthermore, the container is made of polyethylene terephthalate.

  The filling device of the present invention includes the above-described sealing member, and fills the container with the foamable solution.

According to the sealing member of the present invention, when the foamable solution is filled in the container, the sealing member that abuts the opening end of the container and seals the container, the sealing member has an annular shape corresponding to the opening end. have a recess, the width of the recess is 1.2 to 5.0 times the width of the thickness of the open end, the depth of the concave portion, Ru der least 2.0mm or less 30 [mu] m.

  For this reason, since the sliding at the time of contact | abutting with the sealing member of an opening edge part is suppressed, it can reduce that the sealing member which an opening edge part contact | abuts wears, and the replacement time of a sealing member is extended. can do.

  Furthermore, according to the sealing member of the present invention, the effervescent solution is a beverage containing carbon dioxide gas.

  For this reason, since the slip at the time of contact | abutting with the sealing member of an opening end part is suppressed in the case of filling the drink containing a carbon dioxide gas to a container, the sealing member which an opening end part contacts is worn out. This can be reduced, and the replacement time of the seal member can be extended. Therefore, the productivity of the carbon dioxide-containing beverage can be improved.

  Furthermore, according to the sealing member of the present invention, the width of the recess is 1.2 to 5.0 times the width of the thickness of the opening end.

  For this reason, the accuracy of the position where the opening end is in contact with the seal member is improved, and slippage at the time of contact with the sealing member at the opening end is further suppressed. This can be further reduced, and the replacement time of the seal member can be further extended.

  Furthermore, according to the sealing member of the present invention, the depth of the recess is 30 μm or more and 2.0 mm or less.

  For this reason, since the sliding at the time of contact | abutting with the sealing member of an opening edge part is suppressed more, it can reduce that the sealing member which an opening edge part contact | abuts wears more, and the replacement | exchange time of a sealing member Can be extended more.

  Furthermore, according to the sealing member of the present invention, the sealing member is made of any one of a rubber made of an ethylene-propylene copolymer, an acrylonitrile copolymer rubber, a silicon rubber, a fluorine rubber, or a combination thereof.

  For this reason, while being able to implement | achieve high sealing performance, it can reduce more that the rubber | gum of the part which the opening edge part contact | abuts is worn out, and the replacement | exchange time of a sealing member can be extended more.

  Furthermore, according to the sealing member of the present invention, the container is made of polyethylene terephthalate.

  For this reason, it is possible to further reduce the wear of the rubber in contact with the open end of the container made of polyethylene terephthalate, which is widely used, and to extend the replacement time of the seal member.

  According to the filling apparatus of the present invention, the above-described sealing member is provided, and the container is filled with the foamable solution.

  For this reason, it is possible to provide a filling device that can reduce the wear of the sealing member with which the opening end abuts, and can extend the replacement time of the sealing member.

It is principal part sectional drawing by which an example of the filling valve in the filling apparatus of the foamable solution to which the bottle opening packing as a sealing member which concerns on this embodiment is applied was shown. It is a perspective view of the bin mouth packing which concerns on this embodiment. It is a top view of the bin mouth packing which concerns on this embodiment. It is sectional drawing of the bin opening packing which concerns on this embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of a main part illustrating an example of a filling valve 1 in a foaming solution filling apparatus to which a bottle opening packing 20 as a sealing member according to the present embodiment is applied. The filling valve 1 shown in FIG. 1 is provided, for example, in a filling device for a beverage containing a rotating carbon dioxide gas. The filling device includes a filling valve 1, a container holding mechanism 2, a tank (not shown) that stores a beverage containing carbon dioxide gas as a foaming solution that is a filling liquid, a rotating body (not shown), and the like. A plurality of filling valves 1 are provided at a predetermined interval in the circumferential direction on the outer peripheral portion of the rotating body. Corresponding to the filling valve 1, the container holding mechanisms 2 are respectively arranged below the respective valves. In FIG. 1, the filling state to the container 100 is shown. First, the configuration of the filling valve 1 will be described.

  The filling valve 1 is formed with a through hole 10 penetrating in the vertical direction of the filling valve 1. The upper end side of the through hole 10 is connected to a tank, and the carbon dioxide-containing beverage supplied from the tank flows into the through hole 10. In the through hole 10, as in the case of the through hole 10, a columnar injection valve 11 extending in the vertical direction is provided. The upper end of the injection valve 11 is connected to a device that moves the injection valve 11 in the vertical direction, for example, an air cylinder. In the through-hole 10, an annular carbon dioxide-containing beverage liquid passage 12 is formed on the outer periphery of the injection valve 11.

  The through-hole 10 is formed with a funnel portion 13 whose cross section is gradually reduced downward. On the other hand, at the lower end of the injection valve 11, a convex conical surface-like sealing surface 14 whose cross section is gradually reduced is formed downward. The funnel portion 13 and the seal surface 14 constitute a liquid valve 15. When the air cylinder lifts the injection valve 11, the liquid valve 15 is opened, and when the injection valve 11 is lowered, the funnel portion 13 and the seal surface 14 are brought into close contact with each other to close the liquid valve 15.

  A nozzle 16 communicating with the funnel portion 13 and opening at the lower end of the filling valve 1 is formed below the funnel portion 13.

  In addition to the through hole 10, a carbon dioxide gas passage 17 that opens at the lower end of the filling valve 1 is formed in the filling valve 1, adjacent to the nozzle 16. The nozzle 16 and the carbon dioxide gas passage 17 constitute a filling port of the filling device. The carbon dioxide gas passage 17 communicates with either the head space of the tank or the atmosphere, and the communication destination is switched by a switching valve (not shown).

  A bin opening packing 20 as a seal member is attached to the filling valve 1 by a packing holder 18 at a position surrounding the nozzle 16 opening at the lower end of the filling valve 1 and the carbon dioxide gas passage 17. The bin opening packing 20 can be rotated in the circumferential direction. The attached bottle opening packing 20 exposes a contact portion 21 with the opening end 102 of the bottle opening 101 of the container 100 on the lower end side of the filling valve 1. When the container 100 is filled with a beverage containing carbon dioxide gas, the bottle opening packing 20 is in contact with the opening end 102 of the bottle opening 101 of the container 100 so that the inside of the container 100 and the outside air are shut off. .

  Therefore, the bottle opening packing 20 is required to have a sealing property. That is, a material that has airtightness that prevents fluid (liquid and gas) from passing through and excellent in adhesiveness with a member in contact with the bottle opening packing 20 is preferably used. Further, the material of the bottle opening packing 20 needs to be strong enough not to be deformed by the pressure of the fluid to be sealed. The bin opening packing 20 preferably has flexibility and elasticity. For example, synthetic rubber or the like is used for the bin opening packing 20 as a material having a large elastic limit. Furthermore, a foam such as a rubber sponge having both elasticity and viscosity may be used for the bin packing 20 as long as airtightness is ensured.

  The types of rubber used in the bottle packing 20 include rubber made of an ethylene-propylene copolymer, rubber made of an acrylonitrile-butadiene copolymer, hydrogenated acrylonitrile-butadiene copolymer, silicon rubber, fluorine rubber, and the like. preferable. Further, a combination of the rubbers described above may be used for the bin opening packing 20. Note that the material of the main body of the bin opening packing 20 and the contact portion 21 may be different. For example, the bottle opening packing 20 is a mold after an appropriate amount of a vulcanizing agent such as sulfur or peroxide, a filler such as carbon or zinc oxide, and an additive such as an antioxidant are added to the above-described rubber. It is molded by being filled in and heated and pressurized. In addition, the bottle opening packing 20 of this embodiment does not ask | require a compounding agent and the conditions of vulcanization | cure.

  Here, silicon rubber and fluorine-based rubber are excellent in wear resistance. On the other hand, silicon rubber and fluorine-based rubber are slippery, and it is very difficult to bring the container 100 into contact with the bottle opening packing 20 by applying a force capable of withstanding the carbon dioxide pressure filled in the container 100. However, as in the present embodiment, the recess 24 described later is formed in the portion of the bin opening packing 20 with which the bin opening 101 abuts, so that the sliding of silicon rubber or fluorine rubber is suppressed. Therefore, in this embodiment, the carbon dioxide-containing beverage can be satisfactorily filled even in the bottle mouth packing 20 using silicon rubber or fluorine rubber. Thus, the present embodiment can provide the bottle opening packing 20 that is more excellent in wear resistance by being applied to silicon rubber or fluorine rubber.

  Next, the details of the bin opening packing 20 according to the present embodiment will be described. FIG. 2 is a perspective view, FIG. 3 is a plan view, and FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3. In addition, these figures are shown in a state where the surface facing downward in FIG. 1 faces the top surface.

  The bin opening packing 20 is formed in an annular shape, and a columnar hole 22 is formed in the innermost circumference in the axial direction. When the container 100 is filled with a carbon dioxide-containing beverage, it passes through the hole 22 in the axial direction. And in the radial direction outer side of the hole 22, the bin opening packing 20 has a two-stage structure in which the axial thickness is different between the inner peripheral side and the outer peripheral side. On the outer peripheral side of the bin opening packing 20, a flange portion 23 having a smaller thickness than the inner peripheral side is formed. When the bin opening packing 20 is attached to the filling valve 1, the collar portion 23 is fixed by the packing holder 18.

  And the bin opening packing 20 which concerns on this embodiment has the cyclic | annular recessed part 24 corresponding to the opening edge part 102 of the container 100 to contact | abut. That is, a concentric concave portion 24 is formed at a portion where the opening end portion 102 abuts against the abutting portion 21 on the inner peripheral side of the bin opening packing 20. Here, the ring shape is not limited to a perfect circle as long as it corresponds to the shape of the opening end portion 102, and may be a polygon such as an ellipse, a rectangle, or a pentagon. The cross-sectional shape of the recess 24 is, for example, a square shape as shown in FIG. However, the cross-sectional shape of the recess 24 may be, for example, an arc shape or a curved shape. Furthermore, the corner (edge) between the side surface of the recess 24 and the surface of the contact portion 21 may be chamfered.

  The concave portion 24 can be formed at the stage of molding the bin mouth packing 20 by providing a convex portion on a mold for vulcanizing and molding the bin mouth packing 20. According to this manufacturing method, high processing accuracy can be easily realized, and a recess having a predetermined cross-sectional shape, size, and surface roughness can be easily formed. Furthermore, since the recessed part 24 can be easily formed in a smooth surface, wear of the bin opening packing 20 can be further suppressed. And wear-damaged packing strips are less likely to occur. The formation of the recess 24 by this manufacturing method can be confirmed, for example, by measuring the surface properties with a laser microscope, an optical microscope or the like.

  In addition, as for the surface roughness of the recessed part 24, it is preferable that the arithmetic mean height Sa value of the three-dimensional surface property parameter based on international organization ISO (International Organization for Standardization) 25178 is 0.30 micrometer or less. Furthermore, as for the surface roughness of the recessed part 24, it is more preferable that Sa value is 0.20 micrometer or less.

  On the other hand, the recess 24 can also be formed by cutting the flat contact portion 21 of the molded product of the bin opening packing 20. Examples of the cutting method include laser processing and cutting with a metal blade. According to this method, the recess 24 according to the present embodiment can be applied to any ready-made product.

  FIG. 4 shows the dimensions of the recess 24 and the bottle opening 101. If the width W of the concave portion 24 is less than 1.2 times the width t of the thickness of the bottle opening 101 (opening end portion 102) to be abutted, the wear during repeated use is conversely increased. Therefore, the width W of the recess 24 is preferably 1.2 times or more the width t of the thickness of the bin port 101. On the other hand, when the width W of the concave portion 24 is larger than 5.0 times the width t of the thickness of the bin port 101, the effect of suppressing wear during repeated use is small. Accordingly, the width W of the concave portion 24 is more preferably 1.2 to 5.0 times the width t of the thickness of the bottle opening 101 because the wear suppression effect during repeated use is high.

  If the depth d of the recess 24 is less than 30 μm, the effect of suppressing wear during repeated use is low, which is not preferable. Therefore, the depth d of the recess 24 is preferably 30 μm or more. On the other hand, even if the depth d of the recess 24 is deeper than 2.0 mm, there is no great difference in the effect of suppressing wear during repeated use. Therefore, the depth d of the recess 24 is more preferably 30 μm or more and 2.0 mm or less because the effect of suppressing wear during repeated use is high. By setting the depth d of the recess 24 within this range, it is possible to sufficiently cope with variations in shape due to individual differences of the opening end portion 102, and an effect of suppressing wear is exhibited.

  The bin opening packing 20 according to the present embodiment does not select a container to be filled. The bottle opening packing 20 according to the present embodiment is particularly suitable for the container 100 made of polyethylene terephthalate (PET), which is widely used. This is because the bin opening packing 20 according to the present embodiment has a high wear suppression effect during repeated use with respect to the relatively hard bottle opening 101 formed by injection molding. In addition, the bottle opening packing 20 which concerns on this embodiment is not limited to the PET bottle mentioned above, For example, it is suitable also with respect to the container 100 which consists of metal bottle cans or a glass bottle.

  Furthermore, the bin opening packing 20 according to the present embodiment can be formed corresponding to the size and shape of the bin opening 101. Therefore, the bin opening packing 20 according to the present embodiment does not select the capacity of the container 100, the size of the bin opening 101, and the width of the bottle opening 101 to be contacted. Further, the bottle opening packing 20 according to the present embodiment is also excellent in suppressing wear when the container 100 is formed with a small area on the top surface of the bottle opening 101 from the viewpoint of low environmental load and raw material cost reduction. Play. Furthermore, the bin opening packing 20 according to the present embodiment has an effect of absorbing individual differences between containers.

  Next, the filling method of the foamable solution from the filling valve 1 to the container 100, for example, a carbon dioxide-containing beverage, and the operation of the bottle opening packing 20 according to the present embodiment will be described.

  The carbon dioxide-containing beverage filled in the container 100 is pressurized and stored by a carbon dioxide gas in a tank (not shown). A beverage containing carbon dioxide gas is introduced from this tank into the liquid passage 12.

  The container holding mechanism 2 raises the container 100 so that the opening end portion 102 of the bin port 101 of the container 100 is brought into contact with the bin port packing 20 below the filling valve 1. The communication destination of the carbon dioxide gas passage 17 is switched from the atmosphere to the head space (upper space) of the tank by switching the valve. Carbon dioxide is introduced from the tank through the carbon dioxide passage 17 into the container. At this time, it is necessary to press the opening end 102 against the bottle opening packing 20 with a force equal to or higher than the pressure of carbon dioxide gas.

  When the container 100 is filled with carbon dioxide, the air cylinder raises the injection valve 11 at the lower part of the liquid passage 12. When the injection valve 11 is raised, the sealing surface 14 of the injection valve 11 and the funnel portion 13 of the through hole 10 are separated from each other, and the liquid valve 15 is opened. The carbon dioxide-containing beverage naturally falls from the nozzle 16 and is filled in the container 100.

  When the beverage containing carbon dioxide has reached a predetermined filling amount, the air cylinder lowers the injection valve 11. When the injection valve 11 is lowered, the sealing surface 14 of the injection valve 11 and the funnel portion 13 of the through hole 10 are brought into close contact with each other, and the liquid valve 15 is closed.

  Next, the communication destination of the carbon dioxide gas passage 17 is switched from the tank head space to the atmosphere by switching the valve. When the carbon dioxide gas passage 17 is connected to the atmosphere, the head space of the container 100 becomes atmospheric pressure, and the filling of the beverage containing carbon dioxide gas is completed.

  Thus, the bottle opening packing 20 and the opening end 102 of the bottle opening 101 are in contact with each other with a force capable of withstanding the pressure of the carbon dioxide gas in the process of filling the container 100 with the drink containing carbon dioxide. The rubber in the portion where the opening end 102 of the bottle opening 101 hits wears as the number of fillings increases. And the packing is replaced | exchanged by the predetermined frequency | count of filling. Furthermore, when the concave portion 24 is not provided, the position where the opening end portion 102 abuts is likely to vary, so that random irregularities are easily formed on the surface of the abutting portion 21. Since the random unevenness becomes a gas escape route, it is necessary to bring the container 100 into contact with the bottle opening packing 20 with a stronger pressure, and wear is more likely to proceed.

  However, since the bin opening packing 20 according to the present embodiment has the concave portion 24 in the abutting portion 21, the sliding at the time of abutting with the abutting portion 21 (the concave portion 24) of the opening end portion 102 is suppressed. It is comprised so that abrasion of the contact part 21 (recessed part 24) may be reduced. Therefore, in the bin opening packing 20 according to the present embodiment, the wear is suppressed even if the number of times of filling is repeated. And the frequency | count of filling until the bin opening packing 20 is replaced | exchanged can be increased. Furthermore, in the bin opening packing 20 according to the present embodiment, since the recess 24 is provided, the accuracy (reproducibility) of the position where the opening end 102 abuts is increased, so that the surface of the abutting portion 21 has random irregularities. Not formed. Therefore, it is possible to reliably seal the inside of the container 100 and the outside air so that the wear can be further suppressed.

  By the way, for example, in the case of a rotary filling device for carbon dioxide-containing beverages, the beverage containing carbon dioxide gas into the container 100 through the filling valve 1 provided on the outer peripheral portion of the rotating body while the rotating body rotates approximately once. Is filled. For this reason, the carbon dioxide-containing beverage that falls into the container 100 is shaken outward by the centrifugal force and does not fall into the center of the bottom of the container 100.

  On the other hand, the container 100 for filling with a carbonated gas beverage is provided with irregularities on the peripheral edge of the bottom so that the bottom does not deform due to gas pressure. When the beverage containing carbon dioxide falls to the peripheral portion, the beverage containing carbon dioxide that collides with the uneven portion rises and entrains air, and the filling speed may decrease as large foaming occurs.

  Therefore, various measures are taken for the filling valve 1 and the posture of the container 100 at the time of filling so that the beverage containing carbon dioxide gas falls to the center of the bottom of the container 100. For example, the filling valve 1 is arranged such that the bottle port 101 of the container 100 is inclined toward the rotation center side of the rotating body or the discharge port (lower end) of the nozzle 16 faces the rotation center side as shown in FIG. The filling valve 1 and the container 100 are tilted so that the bottom of the container 100 faces outward in rotation.

  When both the filling valve 1 and the container 100 are inclined, the contact state between the packing and the open end 102 of the bottle port 101 is not much different from the normal case. On the other hand, when either the filling valve 1 or the container 100 is tilted, the contact between the packing and the opening end 102 of the bottle port 101 is not uniform, and the pressure tends to become one pressure. It becomes easy to do. Furthermore, when the contact between the packing and the opening end 102 of the bottle mouth 101 is not uniform, the opening end 102 is likely to slip during contact or pressurization, and the opening end 102 is displaced. The frequency of contact increases.

  However, the bin opening packing 20 according to the present embodiment is configured such that the contact position of the bin opening packing 20 is uniquely determined by having the recess 24 in the contact portion 21. Therefore, in the bin opening packing 20 according to this embodiment, even when the packing and the opening end portion 102 of the bin opening 101 are not uniform, the opening end portion 102 slips during contact or pressurization. It is difficult to contact the open end 102 without shifting. And in the bin opening packing 20 which concerns on this embodiment, since it becomes difficult to produce the abrasion by deviation | shift, the wear of packing is suppressed. Further, the bin opening packing 20 according to the present embodiment is configured so that the position of contact is uniquely determined. There is also an effect that the shift is corrected so as to touch.

  As described above, according to the bin opening packing 20 according to this embodiment in which the portion with which the bin opening 101 (opening end portion 102) of the bin opening packing 20 is concave is worn in advance, the wear during repeated use is reduced. It is suppressed. Therefore, according to this embodiment, the bin opening packing 20 excellent in durability can be provided. And according to this embodiment, the exchange time of the bin opening packing 20 can be extended. Therefore, the production efficiency of the container-containing beverage can be increased by reducing the replacement frequency of the bottle mouth packing 20. Furthermore, according to this embodiment, it can suppress that the material (rubber) of packing which carried out wear damage mixes in a carbonated drink, and can improve the safety | security of a containered drink.

  Hereinafter, the present invention will be described in more detail and specifically with reference to Examples and Comparative Examples. However, the present invention is not limited to the following examples.

[Example 1]
(material)
As a filling container, a polyethylene terephthalate bottle having a weight of 23 g and a capacity of 500 ml was used.
For the bottle packing, a rubber in which an organic peroxide, carbon black, and necessary additives were blended with an acrylonitrile-butadiene copolymer was used.
On the surface of the rubber bottle packing that comes into contact with the bottle opening, a concave portion having a square cross section is provided so that the inner diameter is 20.0 mm, the outer diameter is 26.4 mm, the depth is 1.0 mm. It was. The concave portion was formed simultaneously with the molding of the bin mouth packing by providing a convex portion in a mold for heating and pressure molding the bin mouth packing. This width is equivalent to 2.0 times the width of the top of the bin mouth.
(Method)
Filling with the bottle mouth packing in contact with the bottle mouth was performed 50,000 times, and the degree of wear was verified by observing the surface shape of the bottle mouth packing. The degree of wear was evaluated by the amount of change in the depth direction before and after filling the surface of the rubber bottle mouth packing in contact with the bottle mouth. A white interferometer was used for depth measurement. The white interferometer can measure the height with submicron accuracy.
(result)
The wear of the bottle opening packing in Example 1 in which the concave portion was provided on the surface of the rubber bottle opening packing of the acrylonitrile-butadiene copolymer was only 10 μm.

[Comparative Example 1]
(material)
Example 1 was the same as Example 1 except that no recess was provided on the surface of the rubber bottle opening packing.
(Method)
Similar to Example 1.
(result)
In Comparative Example 1 in which there was no recess on the surface of the rubber bottle packing of the acrylonitrile-butadiene copolymer, circular wear having a depth of 40 μm was observed at the portion where the top surface of the bottle opening contacted.

[Example 2]
(material)
The bottle opening packing was the same as in Example 1 except that a rubber in which an organic peroxide and a necessary additive were blended with a fluorine-based rubber was used.
(Method)
Similar to Example 1.
(result)
The wear of the bottle mouth packing in Example 2 in which the concave portion was provided on the surface of the fluorine rubber rubber bottle mouth packing was only 5 μm.

[Comparative Example 2]
(material)
Example 2 was the same as Example 2 except that no recess was provided on the surface of the rubber bottle opening packing.
(Method)
Similar to Example 1.
(result)
In Comparative Example 2 where the surface of the fluorine-based rubber bottle opening packing had no recess, circular wear having a depth of 20 μm was observed at the portion where the top face of the bottle opening contacted.

[Example 3]
(material)
Example 2 was the same as Example 1 except that a recess having a square cross-sectional shape was provided so that the depth was 100 μm.
(Method)
Similar to Example 1.
(result)
The wear of the bottle opening packing in Example 3 in which the recess having a depth of 100 μm was provided was only 12 μm.

[Example 4]
(material)
Except that the inner diameter is 18.0 mm, the outer diameter is 27.6 mm wide (this corresponds to 3.0 times the width of the top of the bottle mouth), and a recess with a depth of 2.0 mm is provided. Similar to Example 1.
(Method)
Similar to Example 1.
(result)
The wear of the bin opening packing in Example 4 in which the inner diameter was 18.0 mm, the outer diameter was 27.6 mm, and the recess having a depth of 2.0 mm was provided was only 11 μm.

[Comparative Example 3]
(material)
The same as Example 1 except that a recess having a depth of 20 μm was provided.
(Method)
Similar to Example 1.
(result)
In Comparative Example 3 in which a recess having a depth of 20 μm was provided, wear having a depth of 38 μm was observed.

[Comparative Example 4]
(material)
Implemented except that the inner diameter is 21.0 mm, the outer diameter is 24.0 mm wide (this is equivalent to 1.0 times the width of the top of the bottle mouth) and the depth is 2.0 mm. Same as Example 1.
(Method)
Similar to Example 1.
(result)
In Comparative Example 4 where the inner diameter is 21.0 mm, the outer diameter is 24.0 mm wide (this corresponds to 1.0 times the width of the top of the bottle mouth), and the depth is 2.0 mm. Wear with a depth of 36 μm was observed.

The following points were derived from the examples described above.
From the results of Example 1 and Comparative Example 1, the depth of wear was suppressed from 40 μm to 10 μm by providing a recess on the surface of the rubber bottle opening packing.
From the results of Example 2 and Comparative Example 2, the depth of wear was suppressed from 20 μm to 5 μm by providing a concave portion on the surface of the rubber bottle opening packing even in the fluorine-based rubber.
By providing the concave portion on the surface of the rubber bottle opening packing of the acrylonitrile-butadiene copolymer, a remarkable effect of suppressing wear appeared. On the other hand, the effect of suppressing wear appeared by providing a recess also on the surface of the rubber bottle opening packing of the fluorine-based rubber that is slippery. Therefore, regardless of the type of rubber, wear was suppressed by providing a recess on the surface of the bin opening packing.

From the results of Example 1 and Example 2, the wear was suppressed by providing a recess having a width 2.0 times the top of the bottle mouth. Furthermore, from the results of Example 4 and Comparative Example 4, the depth of wear is suppressed from 36 μm to 11 μm by changing the width of the recess from 1.0 times to 3.0 times the top surface of the bin mouth. It was done.
Therefore, the width of the concave portion is preferably larger than 1.0 times the width of the top of the bin mouth, and more preferably 2.0 times to 3.0 times.

From the results of Example 2, the wear was suppressed by providing a recess having a depth of 1.0 mm. Further, from the results of Example 4, wear was suppressed by providing a recess having a depth of 2.0 mm. Further, from the results of Example 1, Example 3, and Comparative Example 3, the depth of wear was changed from 20 μm to 100 μm, or 1.0 mm, so that the wear depth was 38 μm to 12 μm, or 10 μm. Was suppressed.
Therefore, the depth of the recess is preferably greater than 20 μm, and more preferably 100 μm to 2.0 mm.

  From the above-described examples, it was shown that the seal member according to the present embodiment has excellent durability by suppressing the wear caused by the repeatedly-abutted bottle opening.

  The present disclosure can be suitably used for a sterile PET bottle filling system. However, the present disclosure is not limited to the above-described embodiments and examples, and can be applied to any filling device including, for example, a metal bottle can and a filling device for glass bottles. Further, the present disclosure is not limited to a beverage containing carbon dioxide gas as a filling liquid to be filled. For example, the filling liquid can be filled with any effervescent solution including solutions other than beverages such as carbon dioxide-containing lotion. Can be applied.

DESCRIPTION OF SYMBOLS 1 Filling valve 20 Bin opening packing 21 Contact part 24 Recessed part 100 Container 101 Bin opening 102 Opening end part d Depth of recessed part t Width of thickness of bottle opening W Width of recessed part

Claims (5)

In the sealing member that seals the container in contact with the opening end of the container when filling the foamable solution into the container,
The sealing member may have a recess of annular shape corresponding to the open end, the width of the recess is 1.2 to 5.0 times the width of the thickness of the open end, the depth of the recess It is characterized der Rukoto than 2.0mm or less 30 [mu] m, the sealing member. The sealing member according to claim 1, wherein the effervescent solution is a beverage containing carbon dioxide gas . The seal member according to any one of claims 1 to 2 , wherein the seal member is made of any one of a rubber made of an ethylene-propylene copolymer, an acrylonitrile-based copolymer rubber, a silicon rubber, a fluorine-based rubber, or a combination thereof. The seal member according to any one of claims. The seal member according to any one of claims 1 to 3 , wherein the container is made of polyethylene terephthalate. A filling device comprising the sealing member according to any one of claims 1 to 4 , wherein the container is filled with the foamable solution.

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