JPH0579568B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to aseptic filling packaging in which a supplied container is sterilized, the container is filled with contents in an aseptic atmosphere, and the container is sealed with a sterilized lid. It relates to container sterilization technology in technology, and more specifically, a container that is supported in a suspended manner between a pair of rails, and sterilizes and dries the container by intermittently transferring the container a fixed distance at a time along the rails. The present invention relates to a container sterilizer that allows a sterilization atmosphere to be divided into different atmospheres.

[Conventional technology]

In contrast to sterilized packaging, which processes food contents as sterilely as possible to keep them fresh for as long as possible, containers are sterilized by sterilizing the contents before filling. In addition, aseptic packaging, which is filled and sealed in an aseptic atmosphere without secondary sterilization, is recognized to be superior in the following respects.

Since the contents are sterilized by short-time high-temperature treatment, there is little heat history, and therefore the original quality of the food, such as flavor, color, and nutritional value, which the contents originally have, can be maintained well.

The stored contents are sterile and can be stored at room temperature.

Since refrigeration is not required for storage and distribution, the huge amount of energy required for low-temperature distribution can be reduced.

The ability to package large containers, which is not possible with canning processing.

Since the shelf life is long, planned production can be carried out.

Since the container, which is a packaging material, is sterilized before packaging, it does not require the heat resistance required for canned goods and retorts.

As described above, aseptic filling and packaging technology has many excellent advantages and has come to be used for filling and packaging many foods. After transporting the container directly into a sterile atmosphere and filling it with the contents,
It is sealed with a sterilized lid.

The processing steps in this aseptic filling and packaging technology include sterilizing the supplied container, filling the sterilized container with contents in an aseptic atmosphere, supplying the sterilized lid, and The process can be broadly divided into the process of sealing the container with the supplied lid.

In the container sterilization process, sterilization of the supplied container is accomplished by passing a sterilizing agent atmosphere through the container, and in the filling and sealing process, the container is removed from the filling position to the lid body in a sterile atmosphere. The container is sequentially moved to the supply position and then to the sealing position to fill the contents, supply the lid, and seal the container.In the container sterilization section, the sterilizer is prevented from remaining in the container, and the sterilizer is In order to prevent deterioration of food products and corrosion of equipment, it is absolutely necessary to prevent the sterilizing agent atmosphere from entering the sterile atmosphere in which the filling and sealing process is performed.

Japanese Patent Application Laid-Open No. 115220/1989 is a prior art technique that satisfies the above-mentioned requirements in this container sterilization technology.

The technique disclosed in JP-A-59-115220 has a configuration in which a chamber for achieving container sterilization is separated from a chamber for filling and sealing, and only sterilized containers are fed into the filling and sealing chamber through a communication port. At the same time, by setting the container sterilization chamber to a lower pressure than the filling and sealing chamber, the sterilizing agent atmosphere in the container sterilization chamber is prevented from entering the filling and sealing chamber.

[Problem to be solved by the invention]

In the above-mentioned conventional technology, the container sterilization chamber and the filling and sealing chamber, which are in communication only through the communication port for passing the containers, are set at a negative pressure in the container sterilization chamber than in the filling and sealing chamber. Although the sterile atmosphere in the room may enter the container sterilization chamber, it is possible to prevent the sterilizer atmosphere in the container sterilization chamber from entering the filling and sealing chamber. However, there is a problem in that there is concern about sending a completely sterilized container to a filling and sealing process in a completely dry state without any sterilizing agent attached to the container.

In other words, a liquid sterilizer is atomized and sprayed onto the container to achieve complete sterilization of the container, and then hot air is blown onto the container to evaporate the sterilizer adhering to the surface of the container, thereby achieving removal of the sterilizer. However, since the sterilizer sprayed into the container sterilization chamber is suspended and spread throughout the container sterilization chamber, even if the sterilizer is removed from the container surface by the action of hot air, This is because it is conceivable that the sterilizing agent floating as atomization in the container sterilization chamber may newly adhere to the surface of the container after the sterilizing agent removal process using hot air has been completed.

In addition, the sterilizer is atomized and sprayed onto the container, causing the sterilizer to adhere to the surface of the container to achieve sterilization of the entire surface of the container. It is difficult to spray the atomized sterilizer uniformly, and this causes a problem in that some parts of the container surface are insufficiently sterilized.

The present invention was devised to solve the above-mentioned problems in the conventional technology, and by regulating the flow distribution of the atmosphere in the container sterilization chamber to a certain shape, the unrestricted diffusion of the sterilizing agent in the container sterilization chamber is prevented. The objective is to prevent this and to ensure that the entire surface of the container is sterilized using a sterilizing agent.

[Means to solve the problem]

The means of the present invention for achieving the above object is to create a sterile atmosphere inside, arrange a container supply body, a container sterilization means, and a hot air supply duct in order in the upper part along the transport direction of containers, and further suck the internal atmosphere. an airtight frame body provided with a suction duct; at least a pair of rails arranged horizontally in parallel within the airtight frame body; an endless chain disposed directly below the transfer path formed by the rails and driven intermittently; The transfer device has a transfer device configured by assembling flat push plates at regular intervals in an upright position to cross the transfer path, and the push plates of the transfer device and the container are arranged surrounding the container passage, and are arranged in an airtight frame. Sealing bodies for restricting the flow of air along the passage direction are arranged respectively on the upstream and downstream sides of the sterilization means and on the downstream side of the hot air supply duct, and the container is placed at the downstream end of the transfer path formed by the transfer device. The airflow control device is provided with a partition seal that opens only the passage port of the airtight frame and partitions the internal space of the airtight frame in the transfer direction.

The transfer device for the above means includes a large number of push plates each having legs extending rearward on both sides of the lower end of a flat plate body, and a pair of endless push plates that are stretched in parallel below the rail and are driven to run intermittently. a chain; a connecting rod for assembling the push plate between both endless chains in an upright position crossing the transfer path formed by the rail by connecting the legs of the push plate to the endless chain at at least two places; It is preferable that the endless chain section running along the chain guide is configured to lightly sandwich the endless chain section from above and below to prevent it from wobbling.

In addition, as a seal for the airflow control device, the outer surface is brought into close contact with the airtight frame body, and the inner surface is placed on both sides of the passage between the pusher plate and the container, with a narrow gap facing the end of the pusher plate that runs intermittently. A pair of shield blocks are placed directly under the endless chain section running in the transfer direction, and both ends are brought into close contact with the airtight frame, with the center of the upper surface facing the lower end of the push plate with an extremely narrow gap, and both ends of the upper surface are shielded. A flat shield plate closely attached to the block,
It is preferable that the seal bar is constructed by arranging a large number of shield bars in a staggered manner with narrow gaps between them, and a shield bar block is disposed in an erected manner between a pair of shield blocks. It is effective to set the length along the line to a value larger than the distance between each push plate in the transfer device.

The shield bar blocks in this seal body are spaced apart on both sides of the main block piece located directly above the transfer path and spanning the entire width of the transfer path.
A fixed block is provided with an auxiliary block piece whose outer end surface is in close contact with the airtight frame body and whose lower surface is in close contact with the shield block, and a fixed block is immovably attached to the rail facing the gap between the main block piece and the auxiliary block piece of this fixed block. It is preferable that a moving block consisting of a pair of assembled block pieces be arranged in series along the transfer path alternately with a slight gap between them.

It is preferable that the shield plates of the first and second seal bodies disposed before and after the sterilizing agent inlet are integrally continuous. Furthermore, it is advantageous to attach an auxiliary shield plate, which is a shield plate, to the transfer path between the ultraviolet irradiation body and the hot air supply duct after sterilization using a disinfectant.

It is advantageous for the suction duct provided in the airtight frame to be provided on the end wall of the airtight frame on the upstream side in the container transport direction in terms of forming an air flow within the container sterilization zone formed by the container sterilizer.

[Effect]

The container is housed in an airtight frame that creates a sterile atmosphere.
The airtight frame is introduced from one end thereof, and is intermittently transferred while being suspended by at least one pair of rails at its mouth flange, subjected to sterilization and drying processing, and then transferred to the filling and sealing processing side.

Intermittent transfer of containers by the transfer device is achieved by pushing one container with one pushing plate, so the combination of the container and pushing plate during container sterilization is a constant movement that isolates the containers. The spatial form will be maintained. In this way, when each pushing plate, which is always in a constant mutual attitude with the container being transferred by pressure, faces the sealing body arranged surrounding the container passing passage of the airflow control device, this sealing body surrounds it. Since the push plate substantially closes the container passage, the flow of the internal atmosphere in the airtight frame body provided with the seal body is regulated by the seal body. In other words, if the length of the seal body along the transfer path is set to a value greater than the interval between the push plates of the transfer device, the push plates will always be located opposite the seal body.
As a result, the atmosphere always flows in a constant manner in the interior of the airtight frame provided with this sealing body. More specifically, the flow in the transfer direction along the transfer path is regulated.

The seal body regulates the degree of passage of the atmosphere by combining with the push plate, but some of the atmosphere that passes through the seal body passes through the small gap between the seal body and the push plate. However, most of the passing atmosphere will pass through the shield bar block. That is, most of the atmosphere passing through the seal 24 passes through the gap between the fixed block and the movable block arranged in a staggered manner in the shield bar block. Therefore, by changing and setting the gap between the fixed block and the moving block of the shield bar block, the degree of passage of the atmosphere through the seal body can be changed and set.

Since seal bodies are arranged on the upstream and downstream sides of the sterilizing agent inlet, the sterilizing agent that is atomized and ejected between the two seal bodies is regulated by both the seal bodies and the push plate. After staying in the space between both seal bodies without diffusing into the airtight frame, the air flows through the air passage regulated by the seal body and the push plate, or together with the push plate that moves intermittently. It moves from the space between the seal bodies in the transport direction and flows out from the end of the shield plate toward the suction duct.

At this time, most of the sterilizing agent sprayed from above into the sterilizing space formed between both seal bodies descends toward the shield plate that forms the bottom of the sterilizing space, and then passes through the shield bar block that is the easiest to pass through. is inverted above where it is placed, and the shield bar block sequentially flows out from the sterilization space while its passing flow rate is regulated. In this way, the sterilizing agent sprayed into the sterilizing space is reversed within the sterilizing space, so it efficiently contacts the entire surface of the container located within the sterilizing space, and its outflow is regulated to ensure sterilization. Since it flows out after staying in the space for a certain period of time, it has ample opportunity to come into contact with the surface of the container, and as a result, the container can be sterilized with the disinfectant very efficiently and reliably.

In addition, the seal body installed on the downstream side of the hot air supply duct, which is the end of the transfer path by the transfer device, is combined with the compartment seal installed at the end of the same transfer path to form a container decontamination device. The internal atmosphere is regulated between a container sterilization zone in the airtight frame and a filling and sealing zone formed in the same airtight frame and receiving sterilized containers from the container sterilization zone.

In contrast to the filling and sealing zone, which is constantly supplied with a sterile atmosphere, the container sterilization zone, where the internal atmosphere is constantly sucked in by a suction duct, has a negative internal pressure compared to the charging and sealing zone, so it is a compartment. Although the sterile atmosphere of the fill-seal zone may pass through the seal and seal body combination into the container sterilization zone, the sterile atmosphere of the container sterilization zone does not enter the fill-seal zone.

In addition, the sterilizing agent sprayed into the sterilizing space formed between the two seal bodies directly below the sterilizing agent inlet,
After the container stays in this sterilization space and sterilizes the container, it passes through the sealing body and flows out from the sterilization space. Riding the flow toward the suction duct, it is quickly sucked into the suction duct and exhausted without diffusing into the airtight frame.

Similarly, hot air blown out from a hot air supply duct,
The sterilizer evaporated from the surface of the container by this hot air quickly flows toward the suction duct together with the exhaust flow in the container sterilization zone. At this time, if an auxiliary shield plate is placed in the transfer path between the container sterilization means and the hot air supply duct, a part of the hot air from the hot air supply duct will be diverted to the container sterilization means side by this auxiliary shield plate. The container can be pre-dried by this divided hot air, thereby achieving complete drying of the container, that is, more complete and reliable removal of the disinfectant from the surface of the container. Further, the exhaust flow from the container sterilization zone flows more reliably toward the suction duct due to the flow of hot air divided by the auxiliary shield plate.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 8 shows an example of the overall configuration of an aseptic filling and packaging device 5 which is constructed by integrally combining the container sterilization device 1 and the filling and sealing device 6 according to the present invention. An airtight frame 8 as a chamber is mounted on the support frame 7, which is the base of the entire device and serves as a storage area for the driving function part of the device, and the airtight frame 8 is arranged horizontally in parallel over the entire length within this airtight frame 8. A pair of rails R are disposed, a container sterilizer 1 is provided in the first half of the airtight frame 8 to form a container sterilization zone M, and a filling and sealing device 6 is provided in the second half to form a filling and sealing zone N. There is.

One end wall of the airtight frame 8 (left end wall in Fig. 8)
A suction duct 80 is provided to exhaust the atmosphere inside the container sterilization zone M to a processing chamber (not shown), and the other end wall (the right end wall in FIG. 8) of the airtight frame 8 is provided with a suction duct 80 for filling and sealing the contents. A discharge port 81 through which the completed container A is carried out from inside the airtight frame 8 while being placed on the rail R.
is formed with an opening.

The filling and sealing device 6 includes a sterile air supply port 60, a filling machine 61, a lid sterilization supply body 62, and a press seal body 6 from the upstream side in the transfer direction on the top plate of the airtight frame body 8.
4 in order, and a positioning body is attached to the airtight frame 8 to accurately position the container A at the filling position, the lid supply position, and the sealing position of the transfer path and to support it in a stable posture, and then the lid It is configured by providing a temporary seal body 63 directly above the rail R at the supply position,
The sterile air supply port 60 always fills the airtight zone N.
The inside of this filling and sealing zone N is filled with the outside of the airtight frame 8 and the sterilization zone M by the sterile air sent into the inside.
The pressure is maintained at a more positive pressure than that of the filling machine, which prevents outside air containing germs from entering the filling and sealing zone N, and also prevents the sterilizing agent atmosphere from entering from the sterilization zone M. 61 pours and fills the desired contents from above into the container A that is stopped at the filling position immediately below, and the lid sterilization supply body 62 is the opening of the container A that is stopped at the lid supply position directly below;
That is, a sterilized sheet-like lid body is supplied on the mouth flange part A2, and the press seal body 64 is applied to the mouth flange part A2.
The lid mounted above is tightly heat-welded to this mouth flange A2 to achieve sealing of the container A with the lid, and the temporary sealing body 63 is positioned extremely high from the lid sterilization supply body 62. In order to accurately prevent the lid body that has been supplied and loaded onto the container A from shifting, the lid body that has just been loaded and supplied is heat-welded to the mouth flange A2 at multiple locations, and each positioning body is moved intermittently. The container A that has been placed is accurately positioned at a filling position, a lid supplying position, or a sealing position, and is supported in a stable posture from below.

Intermittent transfer of container A in this filling and sealing device 6 requires the provision of an auxiliary functional device such as a positioning body directly below the transfer path formed by the rail R, and the possibility that the filling and sealing zone N will be affected by the contents scattered during injection and filling. In order to prevent contamination, it is effective to use a rod that reciprocates along the rail R and enters and exits from the sides of the transfer path formed by the rail R.

As shown in FIGS. 1 and 2, the container sterilizer 1 includes a container feeder 10, a disinfectant inlet 11, and an ultraviolet irradiator 12 on the top plate of an airtight frame 8 from the upstream side in the transfer direction. and the hot air supply duct 13 are installed in this order, and the transfer device 2 is placed directly under the rail R.
Furthermore, an airflow control device 3 is installed to regulate the flow of atmosphere in the container sterilization zone M in a fixed form. Container A is dropped and supplied onto rail R in accordance with the timing, and sterilizer inlet 11 injects liquid sterilizer such as hydrogen peroxide solution into container A located directly below in dew form. The ultraviolet irradiator 12 irradiates the container A with ultraviolet light that has a sterilizing effect, and the hot air supply duct 13 dries the sterilizer adhering to the container A by blowing dry hot air onto the container A from above. scatter.

As shown in FIGS. 1 to 4, the transfer device 2 is connected between a pair of parallel endless chains 23 stretched between the front and rear sprockets 24, 24, from the lower ends of both sides of the flat body to the rear. By connecting the push plate 20 with the leg pieces 21 extended to the two connecting rods 22 which are formed by extending the pins of the endless chain 23, the push plate 20 is moved across the transfer path. The part of the endless chain 23 to which the pushing plate 20 is assembled in an upright position, that is, the part running in the transport direction, that is, the upper endless chain 2
A chain guide 25 in the form of a straight rod is provided to lightly sandwich the three sections from above and below to prevent the endless chain 23 section from wobbling.

This transfer device 2 moves the push plate 20 intermittently by a fixed distance by driving the sprocket 24 on the downstream side in the transfer direction (on the right side in FIG. 2) intermittently by a drive source (not shown). A push plate 20 presses the main body part A1 of the container A, which is supported in a hanging manner between a pair of rails R by its mouth flange part A2, and the container A is intermittently transferred along the rails R by a fixed distance.

The airflow control device 3 includes a first seal body 30a arranged between the container supply body 10 and the sterilizer inlet 11, and a first seal body 30a arranged between the sterilizer inlet 11 and the ultraviolet irradiator 12 along the transfer path. Second seal body 30 arranged
b, a third seal body 30c disposed downstream of the hot air supply duct 13, and a container sterilization zone M disposed at the end of the transfer path formed by the transfer device 2.
and a compartment seal 43 that divides the filling and sealing zone N.
and an auxiliary shield plate 33 disposed directly below the transfer path between the ultraviolet irradiator 12 and the hot air supply duct 13.
and an end seal 44 disposed at the starting end of the transfer path on the upstream side of the container supply body 10.

As shown in FIG. 4, each seal body 30 includes a pair of shield blocks 31 and one shield plate 3.
As shown in FIGS. 5 to 7, the shield bar block 34 is arranged to cross directly above the transfer path for the container A formed by the rail R. A plurality of fixing blocks 35 and driving blocks 39 are arranged in series at alternate intervals along the transfer direction. The fixed block 35 is
The distance between the flat mounting plate 36, the main block piece 37 attached to the center of the lower surface of the mounting plate 36, and the main block piece 37 at the lower surface side end of the mounting plate 36 is determined by the distance at which the rail R is located. The movable block 39 consists of a pair of blocks having a width sufficiently larger than the gap width formed between the main block piece 37 and the auxiliary block piece 38 in the fixed block 35. Each block body is attached by forming two block pieces 41 on the lower surface of the back plate 40, and forming a fitting groove 42 between these two block pieces 41 into which the rib plate R2 of the rail R is tightly fitted. It is composed of

In this way, the shield barb block 34
Since the fixed blocks 35 and the moving blocks 39 are arranged in a staggered manner along the transfer path, the gas passage formed has multiple bends, and this bent passage form facilitates the passage of gas. Fixed block 35
Since the fixed block 35 and the moving block 39 are arranged with an interval between them, by changing the interval between the fixed block 35 and the moving block 39, the degree of restriction on gas passage can be arbitrarily changed and set.

Further, a space is provided between the main block 37 and the auxiliary block 38 of the fixed block 35 to allow the width of the rail R to be changed in accordance with changes in the shape or dimensions of the container A to be transferred.
Since the pair of moving blocks 39 are fixed to the rail R, they are displaced together with the rail R in the width direction of the transfer path. Even if the width of the rail R is reduced from the container A transfer state to the small diameter container A transfer state on the left side of the figure, each moving block 39 maintains a constant gap between it and the adjacent fixed block 35. However, since it moves together with the rail R, even if the width of the rail R is changed, the degree of gas passage restriction of the shield bar block 34 can be maintained at the set value.

Furthermore, since the fixed block 35 and the movable block 39 are arranged with a certain gap, the first seal body 30a and the second seal body 30
The shield bar block 34 in b can minimize the condensation of the atomized sterilizer passing through the shield bar block 34, thereby ensuring that the droplet sterilizer adheres to the surface of the container A. can be prevented.

Since the partition seal 43 has a tunnel shape through which the push plate 20 passes inverted, the combination with this push plate 20 regulates the passage of gas, and for this purpose, the container sterilization zone M is filled and sealed zone N. The inflow amount of the sterile atmosphere flowing from the compartment seal 43 and the third seal body 30c is regulated by the container sterilization zone M due to unlimited inflow.
without disturbing the constant flow pattern of the gas formed within. Similarly, the end seal 44
A push plate 20 with a tunnel shape through which 0 passes inverted.
In addition to regulating the passage of gas in combination with
Since the upper end and both ends of the end seal 44 are brought into close contact with the inner surface of the airtight frame 8, the passage of gas through the end seal 44 is greatly restricted. Even if the inside of the sterilization zone M is under negative pressure, the intrusion of outside air from the container supply ports opened in the airtight frame body 8 corresponding to the container supply pairs 10 is greatly restricted, and the first seal body 30
Since the sterilizing agent atmosphere that has passed through a is quickly sucked and exhausted through the flow path shown by the broken line in FIG. 1, the inside of the container sterilization zone M is not contaminated by outside air.

〔Effect of the invention〕

Since the present invention has the above-described configuration, it can exhibit the following effects.

The combination of the push plate of the transfer device and the airflow control device creates an exposed sterilizing agent atmosphere in the container sterilization zone, which is the internal space, a sterilizing agent atmosphere evaporated from the container surface by hot air, and sterilization from the adjacent filling and sealing zone. Since both the atmosphere and the outside air entering through the container supply port can be evacuated with almost constant flow, unnecessary diffusion of the sterilizing agent atmosphere can be prevented, thereby ensuring that the container is completely and completely removed. In addition, it is possible to prevent the sterilizing agent atmosphere from entering the filling and sealing zone, and it is possible to reliably prevent the occurrence of contamination by outside air.

Since seal bodies are placed on the upstream and downstream sides of the sterilizer inlet, a sterilization space where the sterilizer can stay is formed in the container passageway directly below the sterilizer inlet. Sterilization of the container surface can be achieved more completely and reliably.

The seal body maximizes the amount of gas passing through its shield bar block, so the sterilizing agent sprayed from above into the sterilizing space reverses upward from the bottom of the sterilizing space and then flows out through the shield bar block. Therefore, the entire surface of the container located in this sterilization space is contacted, thereby achieving more efficient sterilization of the container by the sterilizing agent.

Since the inflow of gas from the outside into the container sterilization zone is regulated, the gas flow within the container sterilization zone can be maintained in a constant form, thereby achieving stable container sterilization and drying processing. can do.

The auxiliary seal plate guides a portion of the hot air supplied from the hot air supply duct toward the ultraviolet irradiator, so it is possible to pre-dry containers that have been sterilized with a disinfectant. will be achieved more reliably.

[Brief explanation of drawings]

FIG. 1 is a front view of an embodiment of the container sterilizer according to the present invention, with the front wall of the airtight frame removed. 2 is a plan view showing the arrangement of the portion below the rail of the embodiment shown in FIG. 1. FIG. FIG. 3 is an enlarged perspective view of the main parts of the transfer device combined with the rail. FIG. 4 is a partial longitudinal cross-sectional view showing a combination of the transfer device and the airflow control device in the container passageway portion. FIG. 5 is a partial perspective view of the shield bar block assembled with the rail, viewed diagonally from below. FIG. 6 is a plan view showing changes in the shield bar block corresponding to changes in rail spacing. FIG. 7 is a side view showing changes in the shield bar block corresponding to changes in the rail spacing, with FIG. 7a showing the fixed block and FIG. 7b showing the moving block. FIG. 8 is an overall front view showing an example of an aseptic filling and packaging apparatus constructed by assembling the apparatus of the present invention shown in FIG. 1. Explanation of symbols, 1; Container sterilizer, 10; Container supply body, 11; Disinfectant inlet, 12; Ultraviolet irradiator, 13; Hot air supply duct, 2; Transfer device, 2
0; Push plate, 21; Leg piece, 22; Connection rod, 2
3; Endless chain, 24; Sprocket, 25;
Chain guide, 3; Air flow control device, 30; Seal body, 31; Shield block, 32; Shield plate, 33; Auxiliary shield plate, 34; Shield bar block, 35; Fixed block, 37; Main block piece, 38; Auxiliary Block piece, 39; Moving block, 41; Block piece, 43; Compartment seal, 5;
Aseptic filling and packaging device, 6; Filling and sealing device, 60; Sterile air supply port, 61; Filling machine, 62; Lid body sterilization supply body, 64; Press sealing body, 7; Support frame body, 8;
Airtight frame, 80; Suction duct, A; Container, R; Rail, M; Container sterilization zone, N; Filling and sealing zone.

Claims (1)

[Claims] 1. A sterile atmosphere is provided inside, and a container supply body, a container sterilization means, and a hot air supply duct are arranged in the upper part in order along the direction of transport of containers, and a suction duct is further provided to suck the internal atmosphere. an airtight frame; at least a pair of rails arranged horizontally in parallel within the airtight frame; and an endless chain disposed directly below a transfer path formed by the rails and driven intermittently, in an upright position to cross the transfer path. a transfer device configured by assembling flat push plates at regular intervals; and a transfer device that is arranged to surround the push plates of the transfer device and a passage through which the container passes, and is arranged to surround the push plates of the transfer device and the passage through which the container passes, and to direct the airflow along the passage direction in the airtight frame. A seal body that restricts the flow,
Disposed on the upstream and downstream sides of the sterilization means and downstream of the hot air supply duct, only the passage port of the container is opened at the downstream end of the transfer path formed by the transfer device, and the internal space of the airtight frame is opened. A container sterilizer comprising: an airflow control device configured with a partition seal that partitions the container in the transfer direction; 2. A large number of push plates provided with leg pieces extending rearward on both sides of the lower end of the flat plate body, a pair of endless chains stretched in parallel below the rails and driven to run intermittently, and the endless chains A connecting rod that connects the leg pieces at at least two places to assemble the pushing plate between both endless chains in an upright position crossing the transfer path formed by the rail; 2. The container sterilizer according to claim 1, wherein the transfer device includes a chain guide that lightly clamps the endless chain portion from above and below to prevent it from rattling. 3. A pair of shield blocks disposed on both sides of the passage between the push plate and the container, with their outer surfaces brought into close contact with the airtight frame and their inner surfaces opposed to the end of the pushing plate that runs intermittently with an extremely narrow gap; It is arranged directly under the endless chain portion running in the transfer direction, and has both ends in close contact with the airtight frame, the center of the upper surface faces the lower end of the push plate with an extremely narrow gap, and both ends of the upper surface are in close contact with the shield block. The seal of the airflow control device is made of a flat shield plate and a shield bar block, which is constructed by arranging a large number of shield bars in a staggered manner with narrow gaps between them, and is arranged in an erected manner between the pair of shield blocks. 2. The container sterilizer according to claim 1, wherein the container sterilizer comprises a body. 4. The container sterilizer according to claim 3, wherein the flow rate of the seal body along the transfer path is set to a value greater than the distance between each push plate in the transfer device. 5. A shield bar block is placed on both sides of the main block piece located directly above the transfer path over the entire width of the transfer path, with an interval between the main block pieces, the outer end surface is brought into close contact with the airtight frame body, and the lower surface is brought into close contact with the shield block. A fixed block having auxiliary block pieces arranged thereon, and a moving block consisting of a pair of block pieces immovably assembled to a rail facing the gap between the main block piece and the auxiliary block piece of the fixed block are connected to a transfer path. 4. The container sterilizer according to claim 3, wherein the container sterilizer is arranged in series with slight gaps alternately provided along the line. 6. The container sterilizer according to claim 1, wherein the shield plates of the first and second seal bodies disposed before and after the sterilizing agent inlet are integrally connected. 2. The container sterilizer according to claim 1, wherein the container sterilization means comprises a sterilizing agent spraying section and an ultraviolet irradiation section, and an auxiliary shield plate is attached to a transfer path between the ultraviolet irradiation body and the hot air supply duct. 8. The container sterilizer according to claim 1, wherein the suction duct is provided on the upstream end wall in the container transfer direction.