JPH04132094U - Air replacement device in container headspace - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent a drop in replacement rate when inert gas is blown into a container to fill the lower lumen of the plunger body. [Structure] A main nozzle hole 18 for blowing an inert gas into the container head space 7a immediately before the seal or sealing body 8 is supplied is installed in the lower part of the sealing plunger 2 of the container sealing device which has a container head space. It was installed to be inclined toward the space, and an auxiliary nozzle hole 20 was installed for blowing inert gas into the lower space of the plunger to increase the concentration of inert gas inside the space.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a device for replacing air in a container head space in a sealing machine. Ru.

0002

[Conventional technology]

Figures 1 and 2 show a conventional sealing machine disclosed in Japanese Patent Application Laid-open No. 57-125119. A is a sealing machine rotating body driven and rotated by a drive device (not shown); Container b filled with liquid by a filling machine is supplied onto the body via a transfer star wheel. It looks like this.

0003 c is a cam with a cam groove d fixed to the rotating shaft of the rotating body, and the cam groove d is sealed. The plunger e is engaged and moves up and down as the rotating body a rotates. . The plunger body f has a soot g for squeezing the sealing body, a sealing head h, and a function for pressing down the enclosed sealing head. A bomb i, a magnet j for adsorbing the encapsulant, and a cam follower k that engages with the cam groove d. A sealing body supply port l is mounted and arranged at the bottom of the plunger body by a known mechanism. The sealing body m supplied from the container b and held by the magnet j is sealed at the mouth of the container b. It's starting to stagnate.

[0004] An inert gas injection nozzle hole n is provided in the lower part of the plunger body f, and an inert gas supply pipe q is connected to the nozzle hole n. When the container b filled with the liquid is now supplied onto the rotating body a, the sealing plunger e is lowered by the cam follower k that engages with the cam groove d of the cam c. As the plunger e descends, the lower part f' of the plunger body f comes into contact with the mouth of the container b, resulting in the state shown in FIG. 2. In this state, inert gas such as CO ₂ is blown out from the nozzle hole n, The remaining air in head space b' is replaced with inert gas.

[0005] In this way, the plunger e is further lowered while blowing inert gas. Then, the sealing body m eventually fits into the mouth of the container b, and then the enclosed sealing body m fits into the throat g. It is squeezed and the seal is completed.

[0006]

[Problem that the idea aims to solve]

In the conventional device, an inert gas is blown into the container and the plunger body is When filling the inner cavity of the lower part f′ of f, the flow of inert gas also causes the surrounding gas to become entrained. Air from outside the machine should also flow in through the sealant supply port m, as this will cause an entrained flow. Therefore, the inert gas concentration in the lower lumen of the plunger body f decreases, and The inert gas in container b was replaced, resulting in a decrease in the replacement rate.

[0007]

[Means to solve the problem]

The present invention was proposed in order to eliminate such drawbacks, and it A sealing device is installed at the bottom of the sealing plunger of a container sealing device that has a space surrounding the container space. A main nozzle that blows inert gas into the container headspace immediately before the sealant is supplied. The container is installed at an angle toward the container head space, and the plunger is installed at an angle toward the container head space. Blows inert gas into the space below the tank to help increase the concentration of inert gas inside the space. A device for displacing air in a container head space, characterized by installing a nozzle. This is related.

[0008]

[Effect]

In the present invention, as mentioned above, the seal or the container immediately before the seal is supplied. The main nozzle for blowing inert gas into the head space is tilted toward said head space. In addition to installing it diagonally, a supplementary nozzle is installed inside the lower space of the sealing plunger separately from the main nozzle. Install an auxiliary nozzle to increase the inert gas atmosphere and prevent air from entering the plunger. This improves the efficiency of replacing air in the head space of the container. This is intended to improve the level of performance.

[0009]

【Example】

The present invention will be described below with reference to the embodiment shown in FIG. 1 is a rotating body that is rotatably held on a fixed shaft (not shown), and is arranged at equal intervals in the circumferential direction. The sealing plunger 2 is slidably held throughout. 3 is a container stand rotatably held on the fixed shaft; 4 is the upper part of the plunger 2; A roller constituting a cam follower provided in the stopper, which is integral with the fixed shaft. The plunger engages with a cam groove 6 provided in the cam 5 and rotates as the rotating body 1 rotates. 2 can be moved up and down.

0010 At the bottom of the plunger 2 is a seal such as a crown that is placed on the container 7 during the capping process. A throat 9 is provided which has a crown constriction that constricts the folds of the body 8. Also plastic A stopper head 11 holding a magnet 10 is slidably attached to the lower end of the locking gear 2. There is a centering part 12 at the bottom of the plunger 2, and a centering part 12 at the center of the plunger body. To restrict the lowering of the spring seat 14 which is slidably held via the spring 13. A shoulder 15 is provided for holding the seat. In addition, the same cap head 11 is attached to the upper part of the cap head 11. A spring 16 that is biased to rise is disposed, and a stopper head 1 is provided on the rotating body 1. A stopper 17 for stopping the rise of 1 is fixed. In addition, 11a in the figure is a stopper. This is the stepped portion of the head 11.

[0011] In addition, the lower part of the plunger body is oriented toward the head space 7a of the container 7 and is inert. A main nozzle hole 18 for blowing gas is provided, and an inert gas supply pipe 19 is connected thereto. Further, an inert gas is blown into the plunger body at the lower part of the main nozzle hole 18. An auxiliary nozzle hole 20 for injection is provided, and an inert gas supply pipe 21 is connected to this. It is.

0012 Since the illustrated device is constructed as described above, the container 7 filled with liquid is The sealing body 8 is supplied onto the container stand 3 directly below the sealing jar 2, and the sealing body 8 is supplied by a supply means (not shown). is supplied to the lower end of the stopper head 11 as shown in FIG. Ru. When the rotating body 1 is driven to rotate in this state, due to the engagement between the roller 4 and the cam groove 6, Plunger 2 descends. However, due to the force of the spring 16, the cap head 11 is Hold the raised position and do not descend. Therefore, the sealing body 10 is located at the center of the plunger body. centering section 12. (See Figure 4) In this state, inert gas is blown out from the main nozzle hole 18 and the auxiliary nozzle hole 20. At the same time, the remaining air in the head space 7a of the container 7 is replaced with inert gas. , the inner cavity of the lower part of the plunger body is made to have an inert gas atmosphere. In this case, container 7 Inert gas is blown out immediately after the lower part of the plunger body is fitted to the mouth of the plunger. You may.

[0013] As shown in FIG. The gas expels the air in the container head space 7a and and create an inert gas atmosphere inside the lower part of the plunger body. Therefore, the main nozzle hole 18 In this method, inert gas is blown directly into the container head space 7a, and when it has a displacement effect, In both cases, the mixed flow with the air flowing back from the container 7 fills the lower lumen of the plunger.

[0014] The auxiliary nozzle hole 20 blows inert gas into the lower part of the plunger, and controls the atmosphere. Increase inert gas concentration. This allows the surrounding air to be entrained by the jet from the main nozzle hole 18. This increases the concentration of inert gas in the body and prevents air from entering the aircraft. If the plunger body further descends while blowing inert gas in this way, the impact will occur. The stepped portion 11a of the stopper head 11 has a stronger spring force than the spring 16. At this point, the spring seat 14 that is energized by the set spring 13 is in contact with the spring seat 14. As a result, the cap head 11 descends together with the plunger body.

[0015] Then, the sealing body 8 is placed on the container mouth of the container 7 which has been centered by the centering part 12. When the capping head 11 makes contact, it stops descending, and the plunger 2 then descends to seal the cap. The folds of the body 8 are squeezed into the mouth of the container by the constriction part of the throat 9. At this point, the capping head 11 is The spring seat 14 is moved against the biasing force of the spring 13 by the pressure contact force with the container 7. Pushing up, the result is a position above the throat 9. (See Figure 5) Also, at the mouth of the container. The folds of the capped seal 8 are squeezed by the throat 9 to fit the shape of the container mouth. and the capping is completed.

[0016] Note that the injection of inert gas should be stopped when the plunger body descends again. You may do so. Note that when the plunger body is lowered again, inert gas is blown from the main nozzle hole 18. The injection may be stopped and only the injection from the auxiliary nozzle hole 20 may be continued. Also, when injecting inert gas, first start from the main nozzle hole 18, then the auxiliary nozzle. Alternatively, the air may be blown into the hole 20.

[0017] At this time, when the plunger body is lowered again, from the main nozzle hole 18 and the auxiliary nozzle hole 20. The blowing may be continued or the blowing may be stopped. Furthermore, each of the nozzle holes 18 and 20 may be provided in plural numbers.

[0018]

[Effect of the idea]

As mentioned above, the present invention is a container seal having a space surrounding the head space of the container. At the bottom of the sealing plunger of the device, there is a container head just before the seal or sealant is fed. Aim the main nozzle for blowing inert gas into the space toward the head space of the container. The plunger is installed at an angle, and is installed in the lower space of the plunger separately from the main nozzle. An auxiliary nozzle is installed to blow inert gas and increase the concentration of inert gas inside the space. Gas replacement is performed within the sealing plunger through the main nozzle and the auxiliary nozzle. This structure prevents inert gas from escaping, improving gas replacement efficiency. It has good performance and consumes less gas.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view schematically showing a conventional sealing machine.

FIG. 2 is an enlarged longitudinal sectional view taken along the arrow in FIG. 1;

FIG. 3 is a longitudinal cross-sectional view showing the operating state of an embodiment of the apparatus for displacing air in the container head space according to the present invention.

FIG. 4 is a longitudinal sectional view showing the operating state of the embodiment.

FIG. 5 is a longitudinal sectional view showing the operating state of the embodiment.

FIG. 6 is a partially enlarged detailed view of FIG. 4;

[Explanation of symbols]

2 Sealing plunger 8 Sealed body 18 Main nozzle hole for inert gas injection 20 Auxiliary nozzle hole for inert gas injection

──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Seitoshi Suzuki 1 Takamichi, Iwatsuka-cho, Nakamura-ku, Nagoya, Aichi Prefecture Mitsubishi Heavy Industries, Ltd. Nagoya Equipment Works (72) Creator Isao Uno 1 Takamichi, Iwatsuka-cho, Nakamura-ku, Nagoya, Aichi Prefecture Mitsubishi Heavy Industries, Ltd. Nagoya Research Center (72) Creator Masaru Nishimura 1 Takamichi, Iwatsuka-cho, Nakamura-ku, Nagoya, Aichi Prefecture Mitsubishi Heavy Industries, Ltd. Nagoya Research Center (72) Creator Sadahiro Abe 1 Takamichi, Iwatsuka-cho, Nakamura-ku, Nagoya, Aichi Prefecture Mitsubishi Heavy Industries, Ltd. Nagoya Research Center (72) Creator Shinichi Sasaki 60 Kutansho, Iwatsuka-cho, Nakamura-ku, Nagoya-shi, Aichi Prefecture Ground 1 Inside Churyo Engineering Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A main nozzle for blowing an inert gas into the container head space immediately before the seal or sealing body is supplied is installed at the bottom of the sealing plunger of a container sealing device having a space surrounding the container head space. of the air in the head space of the container, characterized in that the plunger is installed at an angle toward the bottom of the plunger, and an auxiliary nozzle is installed to blow inert gas into the lower space of the plunger to increase the concentration of inert gas inside the space. Replacement device.