JPH0928772A - Rotary pressure-heating sterilization tray for filled flexible pouch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To houes a filled flexible pouch by forming the housing part of the filled flexible pouch between the lower surface of the bottom plate of an upper tray and the upper surface of the bottom plate of a lower tray and to stably house the pouch and contents without high pressure to the filled flexible pouch and without applying impairing them. SOLUTION: A tray 206 is formed with a plate in which plural circular holes are provided on an aluminum plate in a rectangular parallelopiped. The tray is formed in axial symmetry setting a length direction center line S as a symmetry axis, and right and left side plates 232, 234, front and real side plates 236, 238 and a pair of upper and lower bottom plates 240, 242 are provided. Moreover, plural partition plates 252, 254 intersecting orthogonally to the center line S are provided so as to form a block chamber 250 to house the filled flexible pouch one by one. Such tray 206 is piled up, and the filled flexible pouch is housed in the block chamber 250 by matching the isosceles triangle of the pouch with that of block chamber 250, then, heat treatment is applied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soft packaging bag such as a pouch which is filled with a filling and sealed to form a filled soft packaging bag, which is heated in a tank under pressure heat sterilization treatment while being rotated. The present invention relates to a rotary pressure heat sterilization tray for a filled soft packaging bag to be pressure heat sterilized.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 5-227920 discloses a soft packaging bag having a vertical cross section of an isosceles triangle filled with a filling material and hermetically sealed to form a filled soft packaging bag. Regarding a rotary pressure heat sterilization tray of a filled soft packaging bag that is subjected to pressure heating and sterilization treatment while rotating the filled soft packaging bag in a tank, a filled soft packaging bag accommodating region is formed in a rectangular parallelepiped, and the length of the filled soft packaging bag is long. The direction is formed by directing the rotation radial direction of the tray. The one disclosed in Japanese Unexamined Patent Publication No. 6-237744 is filled with a filling material in a soft packaging bag and sealed to form a filled soft packaging bag, which is heated while rotating the filled soft packaging bag in a pressure heat sterilization treatment tank. Concerning the rotary pressure heat sterilization tray of the filled soft packaging bag to be subjected to pressure heat sterilization treatment, a concave holding plate having a curved surface of substantially the same curvature is opposed to the upper and lower trays stacked in layers, respectively on the outer circumference of the filled soft packaging bag. It is provided in the position,
The space formed by the holding plate when these trays are stacked is a storage portion of the filled soft packaging bag, and the tray is held by the curved surface of the filled soft packaging bag stored in the storage portion.

[0003]

[Patent Document 1] Japanese Patent Laid-Open No. 22792/1993
Since the tray disclosed in Japanese Patent Publication No. 0 has a filled soft packaging bag accommodating portion having the same thickness in the rotation radial direction, the rotation of the tray causes the filled soft packaging bag to move inside the accommodating portion. Due to this movement, the surface of the filled soft packaging bag is rubbed and damaged by the wall portion of the housing portion, and in some cases, the bag may be broken. If the volume of the containing portion is reduced and the filling soft packaging bag is pressed against the containing portion in order to prevent movement of the filling soft packaging bag, the solid matter in the filling material of the packaging bag is destroyed, The filled soft packaging bag may expand and deform due to heat sterilization, or the bag may break. Further, in the rotary pressure heat sterilization, by providing a head space in the filling soft packaging bag, the gas in the head space moves in the filling soft packaging bag during the rotary sterilization, and the sterilizing effect of the filling is obtained. Can be improved. However, there is a problem that the sterilization efficiency of the filling is lowered because the filled soft packaging bag is pressed against the storage portion as described above.

These problems are particularly remarkable in a filled soft packaging bag, that is, a standing pouch by filling and sealing a filling in a soft packaging bag whose vertical cross section is substantially an isosceles triangle.

The tray disclosed in Japanese Unexamined Patent Publication No. 6-237744 has a lot of wasted space between stacked trays, and the number of filling soft packaging bags that can be sterilized in one sterilization step is small, and the sterilization efficiency is small. However, from another perspective, there is a problem that a very bulky pressure heat sterilization treatment tank is required. Further, the tray disclosed in Japanese Patent Laid-Open No. 6-237744 also has a filling soft packaging bag accommodating portion having the same thickness, so that in the case of the above-mentioned standing pouch having a non-uniform thickness, the filling soft packaging bag is There is a problem that the container is not stable and easily moves in the housing portion. Therefore, this movement may cause the surface of the filled soft packaging bag to be rubbed and damaged by the wall portion of the housing portion, possibly breaking the bag. -22
There is the same problem as disclosed in Japanese Patent Publication No. 7920. Further, in the conventional tray in which the packaging bag may be broken or damaged, it has been proposed to lay a silicone rubber sheet on the tray to accommodate the packaging bag. Although this method can prevent breakage / damage, it has a problem that the heat sterilization efficiency is extremely low.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional rotary pressurizing heat sterilization tray for a filling and packaging bag, and is a soft packaging bag having a vertical cross section of an isosceles triangle. Stable storage of filled soft packaging bags without applying a large pressure by filling and sealing, and there is no risk of damage to the filled soft packaging bags or destruction of the filling even when the tray rotates, and high heat sterilization efficiency An object is to provide a pressure heat sterilization tray for a filled soft packaging bag.

[0007]

According to the present invention, a soft packaging bag having a vertical cross section of an isosceles triangle is filled with a filling material and sealed to form a filling soft packaging bag. In a rotary pressure heat sterilization tray of a filled soft packaging bag that is subjected to heat sterilization treatment while rotating the packaging bag, the tray is a left and right side plate in a plane parallel to the center line and a plane orthogonal to the center line. The tray has an outer shape of a rectangular parallelepiped consisting of the front and rear side plates, and the tray further has a depth in the vicinity of the left and right side plates that is equal to half the width of the bottom of the filling soft packaging bag, A rotary pressure heat sterilization tray having a bottom plate forming a filled soft packaging bag accommodating portion having a depth of 0 near a position separated by the height of the filled soft packaging bag.

An embodiment of the present invention is as follows.
The front and rear side plates of the tray have a plurality of fluid passage holes. The left and right side plates of the tray have a plurality of fluid passage holes. The front and rear side plates of the tray have semicircular fluid passage holes at the upper and lower edge portions of the front and rear side plates. The left and right side plates of the tray have semicircular fluid passage holes at the upper and lower edge portions of the left and right side plates. The height of the front and rear side plates and the left and right side plates of the tray is 1 / the width of the bottom of the filled flexible packaging bag.
It is larger than 2 and has a double bottom plate. The length of the front and rear side plates of the tray is not less than twice the height of the filling soft packaging bag, and the filling soft packaging bag accommodating portions are formed in pairs.

[0009]

The trays of the present invention are used for stacking, and when they are stacked, a filling soft packaging bag accommodating portion is formed between the lower surface of the bottom plate of the upper tray and the upper surface of the bottom plate of the lower tray. A filled flexible packaging bag having a substantially isosceles triangle in vertical cross section can be accommodated by matching the lower surface and the upper surface of the bottom plate. Therefore, according to the present invention, the filled soft wrapping bag can be stably held in the tray without being subjected to local or excessive pressure during the sterilization treatment by heating under pressure.

[0010]

According to the present invention, a soft packaging bag whose vertical cross section is substantially an isosceles triangle is filled with a filling material and hermetically sealed so that the filled soft packaging bag can be stably accommodated without applying a large pressure, and the tray There is no risk of damage to the filled soft packaging bag or destruction of the filling even by rotation, and there is an effect that the heat sterilization efficiency can be kept high. According to the embodiment of claim 2, by providing a plurality of fluid passage holes on the front and rear side surfaces of the tray, hot water can be efficiently exchanged between the inside and outside of the tray, and the sterilization effect of the filling is improved. To do. Claim 3
According to the described embodiment, by providing a plurality of fluid passage holes on the left and right side surfaces of the tray, the hot water in the tray is moved in accordance with the flow of hot water in the rotational radial direction generated in the rotary sterilization treatment tank during rotary sterilization. The hot water is sent to the outside and the hot water inside and outside the tray is efficiently exchanged, and the sterilization efficiency of the filling is improved.

According to the fourth aspect of the present invention, when the semicircular fluid passage holes are provided at the upper and lower edges of the left and right side plates of the tray, the semicircular fluid passage holes are circular when the trays are stacked. To form a fluid passage hole. As a result, a larger amount of hot water near the top or the center of the bottom of the filled flexible packaging bag is sent out of the tray through the circular fluid passage hole, and the exchange of hot water inside and outside the tray is efficiently performed to sterilize the filling. Efficiency is improved. According to the fifth aspect of the present invention, the hot water path inside the tray can be secured by doubling the bottom plate, and the sterilization efficiency of the filling material is improved. According to the embodiment of claim 6, a larger number of filled soft packaging bags can be accommodated in the tray, and a large number of filled soft packaging bags can be sterilized at one time. At the time of sterilization, the upper corners of the filled soft packaging bag sandwiched between the upper and lower trays are in a tight state due to the expansion of the filling material. According to the embodiment of the present invention, the filled soft packaging bag is brought into contact with the tray. It is possible to prevent damage to the upper corners. According to the embodiment of claim 8, the filled soft packaging bag can be efficiently sterilized by directly contacting the filled soft packaging bag with hot water.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[First embodiment] Rotary retort sterilizer As shown in FIG. 4, a sealed soft packaging bag filled with contents, that is, a so-called rotary retort sterilizer 1 that sterilizes while rotating the filled soft packaging bag is pressurized and heated. Control of a horizontal cylindrical pressure heat sterilization treatment tank 2 for performing sterilization treatment, a hot water tank 3 provided above the pressure heat sterilization treatment tank 2 for temporarily storing hot water, and a rotary retort sterilizer 1. A storage unit 4 for storing information, and a control unit 5 for controlling the operation and the like of the pressure heat sterilization treatment tank 2 based on the storage information of the storage unit 4 are connected by a communication pipe or a connecting line. As shown in FIGS. 3 and 4, the pressurized heat sterilization treatment tank 2 is supported by a horizontally-oriented cylindrical sterilization treatment drum 201 and a plurality of bearings 202, and rotates about the axis of the sterilization treatment drum 201. The frame 203 is included. Rotating frame 203
Two rails 204 are arranged near the bottom of the rail. On the rail 204, a trolley 208 for mounting a plurality of trays 206 containing filled soft packaging bags is provided with a rotary frame 203.
It is provided so as to be slidable parallel to the axis of the.

The sterilization drum 201 has an upper supply / drain port 210 and a supply / exhaust port 211 on the upper surface, and a lower supply / drain port 212 on the lower surface. Sterilization drum 20
1 is provided with a holding mechanism 214 for fixing the trays 206 to the sterilization processing drum 201 so that the accommodated tray 206 does not come off the carriage 208 and the carriage 208 does not come off the rail 204. ing.

As shown in FIG. 4, the sterilization drum 201 is provided with an opening / closing door 224 for taking in and out the tray 206 and the carriage 208 on one side, and the other side is closed. The above-mentioned closed side of the sterilization processing drum 201 has a rotary drive shaft 2 penetrating therethrough.
26 are provided. The rotary drive shaft 226 is for transmitting a driving force from a rotary power source (not shown) arranged outside the sterilizing drum 201 to the rotary frame 203. As shown in FIG. 3, the hot water tank 3 is provided with an intake / exhaust port 250 on the upper surface, a first water supply / drain port 252 and a second water supply / drain port 254 on the lower surface, and further, a steam supply pipe 256 is provided in the lower part of the hot water tank 3. It is arranged. In the control system of the hot water tank 3, as shown in FIG. 4, the control unit 5 controls the output signal of the storage unit 4, the pressure sensor (not shown) and the temperature sensor (not shown) provided in the pressure heat sterilization treatment tank 2. The opening / closing of the valves 326 and 330 is controlled based on the output of (not shown).

As shown in FIG. 4, the pressure heating and sterilization treatment tank 2 and the hot water tank 3 are connected to each other by connecting the hot water sterilization treatment tank 2 and the hot water sterilization treatment tank 2 to a valve 30.
2. Circulation pump 304, steam mixing unit 306, valve 30
8 is connected to the second water supply / drain port 254. The hot water in the pressurized heat sterilization tank 2 can be returned to the hot water tank 3 by this connection path.

The lower water supply / drain port 212 also has a valve 30.
2. Water supply source 3 via valve 310 and water supply pump 312
13. The cooling water can be supplied to the pressurized and heated sterilization tank 2 through this connection path. The lower water supply / drain port 212 is further connected to the outside via a valve 314. The hot water and the cooling water in the pressurized heat sterilization tank 2 can be discharged to the outside by this connection path. The upper water supply / drainage port 210 is connected to the lower water supply / drainage port 2 via the valve 316, the steam mixing unit 306, the circulation pump 304, and the valve 302.
12. The steam mixing unit 306 includes a valve 3
It is arranged in the steam supply source 320 via 18. With these connecting paths, hot water in the pressurized heat sterilization tank 2 can be taken out, reheated by mixing steam in the steam mixing section 306, and returned to the pressurized heat sterilization tank 2 again. The air supply / exhaust port 311 of the pressurized heat sterilization treatment tank 2 is connected to an air vent port 328 via a valve 326, and is also connected to a pressurized air source 332 via a valve 330.

The first water supply / drain port 52 of the hot water tank 3 has a valve 3
34, the valve 310, and the water supply pump 312, and is connected to the water supply source 313. The hot water tank 3 can be supplied with water through this connection path. The first water supply / drainage port 52 is also communicated with the outside via a valve 336. The steam supply pipe 56 of the hot water tank 3 is connected to the steam supply source 320 via a valve 340. With this connection path, the hot water in the hot water tank 3 can be heated by mixing steam. The intake / exhaust port 50 of the hot water tank 3 is connected to the air vent port 352 via the valve 350, and is also connected to the pressurized air source 356 via the valve 354.

Tray As shown in FIGS. 1 and 2, the tray 206 has a rectangular parallelepiped outer shape formed by a plate material in which a plurality of circular holes are provided in an aluminum plate. The tray 206 has a line-symmetrical shape with the center line S in the longitudinal direction of the rectangular parallelepiped as the axis of symmetry, and the left and right side plates 232 and 234 that are in a plane parallel to the center line S.
And front and rear side surfaces 236, 238 orthogonal to the center line S,
It has a pair of bottom plates 240, 242 and a plurality of partition plates 252, 254 extending orthogonally to the center line S to form a compartment 250 for accommodating the filled soft packaging bags one by one. As a result, a number of trays can be stacked so that the compartments face each other, and a large number of filled soft packaging bags can be heat-treated at one time. Further, on one side of the tray 206, that is, on the upper surface, when the trays 206 are stacked, a slip stopper 25 for preventing upper and lower sides from sliding sideways with each other.
7 are provided at the four corners.

The bottom plates 240 and 242 have bottom plate inclined portions 270.
And a bottom plate horizontal portion 272 continuous with the bottom plate inclined portion 270. In the bottom plate inclined portion 270, the maximum depth of the compartment 250 is ½ of the width of the bottom of the filling soft packaging bag, and the width of the compartment in the direction orthogonal to the center line S is 5 times the height of the filling soft packaging bag.
It is formed to form a compartment 250 of dimensions plus cm. Left and right side plates 232, 234, front and rear side parts 236, 2
The height of 38 is one half of the width of the bottom of the filled soft packaging bag plus, for example, 2 cm, and therefore the height of the bottom plates 240, 242.
The vertical distance between the two is about 2 cm. Front and rear side portions 236,
238 has a bag shape and communicates with a space formed between the bottom plates 240 and 242.

The sterilization cycle storage unit 4 is pressure / temperature control information for performing sterilization while keeping the air content of the filled soft packaging bag carried into the pressure heat sterilization treatment tank 2 in excess of 2%. I remember.
As shown in FIG. 5, the pressure / temperature control information becomes a temperature graph A and a pressure region graph B when time is plotted on the horizontal axis and pressure and temperature are plotted on the vertical axis. In order to perform the pressure / temperature control shown in FIG. 5, the pressure heat sterilization treatment tank 2 is operated as follows. That is, during the period from the start of sterilization L to M, hot water is heated to a predetermined temperature to perform pressurized heat sterilization. In the period MN, the pressure in the pressurized heat sterilization tank 2 is set to a high pressure, the hot water in the pressurized heat sterilization tank 2 is returned to the hot water tank 3, and then the cooling water is supplied to the pressurized heat sterilization tank 2. . The period NO is immediately after the pressure in the pressure heat sterilization treatment tank 2 rises by a predetermined value, and the cooling water is caused to flow in the pressure heat sterilization treatment tank 2 to perform the primary cooling of the filled soft packaging bag. Period OP is a preparatory period for cooling to a lower temperature, and in order to replace the cooling water with a low temperature, the high temperature cooling water in the pressure heat sterilization treatment tank 2 is discharged and a new low temperature is used. Supply cooling water. In the period PQ, secondary cooling is performed by circulating cooling water. In the period QR, the cooling water is discharged, and one cycle of pressurized heat sterilization and cooling ends.

Filled Soft Packaging Bag The filled soft packaging bag to be sterilized by the rotary retort sterilizer 1 is, for example, a standing pouch having an isosceles triangular vertical cross section, and its capacity is 1 kg or more as specific gravity 1.
It is preferably 2.5 kg to 5 kg. The material of the soft packaging bag is, for example, a laminate of first layer (outer layer) polyethylene terephthalate / second layer nylon / third layer aluminum / fourth layer unstretched polypropylene. Those that are sterilized are soups, stews,
It is a liquid such as curry. The filling is performed so that the volume ratio of the head space (space) to the total volume of the soft packaging bag after sealing, that is, the air content is 2 to 20%.
Headspace is generally air, but nitrogen gas,
It may be argon gas. More specifically, the air content is, for example, 3 to 20%, and preferably 3 to 10%.

When the air content is 2% or less, the ratio of the head space to the volume of the filling is small, and the entire filling is not sufficiently stirred during sterilization. On the other hand, if the air content is 2
In the case of 0% or more, the stirring efficiency of the filling at the time of sterilization does not increase in proportion to the rise of the air content, and the filling soft packaging bag becomes bulky with respect to the filling, and the transport and storage of the filling soft packaging bag are performed. Disadvantageous. Furthermore, if the headspace is filled with air, the possibility of the filler oxidizing during disinfection and discoloring or deteriorating the quality is increased, and if the headspace is filled with an inert gas, It is uneconomical. In order to uniformly and simultaneously heat and sterilize a plurality of filled soft packaging bags by a single pressure heating and sterilization treatment, the variation of the air content in the plurality of filled soft packaging bags is set to the set air content. On the other hand, it is set within -3 to + 50%, preferably within -3 to + 10%.

Sterilizing Operation The sterilizing operation of the rotary retort sterilizer 1 having the above-described structure will be described with reference to FIG. [Hot water preparation step] The valve 310 and the valve 334 are opened, the water supply pump 312 is operated, and the water supply source 313 is opened.
Supplies a predetermined amount of water to the hot water tank 3. After the water supply is completed, the valves 310 and 334 are closed and the valve 340 is opened to inject steam from the steam supply source 320 into the water in the hot water tank 3 through the steam supply pipe 56. Adjust the opening and closing of the valves 350 and 354, and
Is set to be 5 to 10 ° C. higher than the scheduled sterilization temperature. In this case, it is desirable to prevent the bumping in the hot water tank 3 by adjusting the pressure in the hot water tank 3 by adjusting the opening and closing of the valves 350 and 354.

[Step of Loading Filled Soft Packaging Bag into Pressurized Heat Sterilization Treatment Tank] The filled soft packaging bag is accommodated in the compartment 250 formed in the tray 206 in a lying state. Subsequently, the tray 206 is stacked on the carriage 208 in a predetermined level. As a result, the filled soft packaging bag accommodated in the compartment 250 of the tray 206 is pressed by the bottom plate 242 of the tray 206 above it. Next, the door 224 of the sterilization processing drum 201 is opened, and the plurality of carts 208 prepared are sequentially carried into the sterilization processing drum 201. After that, the trays 206 and the carts 208 that have been stacked are fixed to the rotating frame 203 by the pressing mechanism 214, and the opening / closing door 224 is closed.

[Pressurizing Heat Sterilization Step] Valve 33
4. The valve 316 is opened, and the circulation pump 304 is operated to supply the hot water in the hot water tank 3 from the upper water supply / drain port 210 to the sterilization drum 201. The amount of hot water to supply is
It is determined that the rotated tray 206 is always in hot water. As a result, the temperature of the pressurized heat sterilization tank 2 is gradually increased to reach the sterilization set temperature. The rotary frame 203 starts rotating when the supply of hot water to the hot water tank 3 is completed. The rotation speed of the rotary frame 203 varies depending on the type of the filling material, the filling amount, the viscosity, the air content of the filling soft packaging bag, and the like, but is 10 to 50 rp.
m, preferably 15 to 30 rpm. Next, after closing the valve 334 and the valve 308 and opening the valve 302, the circulation pump 304 is operated to flow hot water from the upper part to the lower part in the sterilization treatment drum 201. At the same time, the opening / closing of the valve 318 is controlled, and the sterilization drum 20 is controlled.
The steam is mixed from the steam supply source 320 into the hot water discharged from No. 1. In this way, the temperature inside the sterilization processing drum 201 is controlled so as to be a time-temperature curve A shown in FIG.
As a method of controlling the temperature in the pressurized heat sterilization tank 2, for example, there is PID control or the like.

Until the time when the cooling process is almost completed after the hot water is introduced into the pressure heat sterilization treatment tank 2 (time P in FIG. 4), the pressure heat sterilization process is performed by the pressure sensor (not shown). The pressure in the tank 2 is detected. When the temperature in the pressure heat sterilization treatment tank 2 is sterilized at 100 ° C. or higher, the pressure is set so that the air content of the filled soft packaging bag exceeds 2%. The opening and closing of the valves 326 and 330 are controlled so that the pressure is within the pressure range B. As a result, a sufficient head space is secured in the filled soft packaging bag until the pressurized heat sterilization treatment is completed, and the filled soft packaging bag is rotated by rotating the filled flexible packaging bag. Is sufficiently stirred, sterilization can be performed with high heat efficiency in a short time, and generation of heat sterilization unevenness can be effectively prevented.

[Cooling Step] The rotation of the sterilization drum 201 is stopped at the time when the pressure heat sterilization is almost completed (time M in FIG. 5). Thereafter, the pressure in the pressurized heat sterilization tank 2 is increased by 0.1 to 0.8 k from the pressure in the pressurized heat sterilization processing.
g / square cm, preferably 0.2-0.4 kg / square c
The pressure is raised so as to be higher by m (time pressure region C in FIG. 5). Next, the valve 310 is closed, and the valve 308 is closed.
Is opened, the hot water in the pressurized heat sterilization tank 2 is returned to the hot water tank 3 via the lower water supply / drainage port 212, the valve 302, the circulation pump 304, and the valve 308. Then, the valve 308 is closed, the valve 310 is opened, the water supply pump 312 is subsequently operated, and a predetermined amount of cooling water is pressurized and sterilized from the lower water supply / drain port 212 through the valve 310 and the valve 302. Water is supplied into the tank 2. After that, the valve 310 is closed and the valve 31 is closed.
After 6 is opened, the circulation pump 304 is operated.
Thus, the cooling water is caused to flow in the sterilization processing drum 201 to start the cooling processing. Thereafter, if desired, as shown in FIG. 4, cooling may be performed again with fresh low-temperature cooling water.

By cooling these, the pressure in the pressure heat sterilization treatment tank 2 is rapidly reduced. The reason is that the gas in the pressurized heat sterilization tank 2 is rapidly cooled by the circulation of the cooling water supplied to the pressurized heat sterilization tank 2 to reduce its volume, and in addition to the pump of the circulation pump 310 It is presumed to be due to the negative pressure generated by the action. This sudden decrease in pressure in the pressurized heat sterilization tank 2 is detected by the pressure sensor (not shown). If such a sudden pressure drop occurs, the filled flexible packaging bag should break. However, in the rotary retort sterilizer 1, as described above, before the cooling water is supplied,
Since the pressure in the pressure heat sterilization treatment tank 2 is increased to be 0.1 to 0.8 kg / square cm higher than the pressure during the pressure heat sterilization treatment, the pressure in the heat sterilization treatment tank 2 is rapidly increased. Even if the decrease occurs, the pressure in the pressure heat sterilization treatment tank 2
It is possible to maintain the height at which the filled soft packaging bag does not expand and break.

Further, the above cooling start (starting circulation of cooling water)
At the same time, the rotating frame 203 is rotated again. The number of rotations in this case is 10 to 50 rpm, preferably 1 as described above.
It is preferably 5 to 30 rpm. From the start of the cooling, that is, the circulation of the cooling water, to the time when the temperature of the filling material in the filling flexible packaging bag falls to the temperature at the time of filling, the pressure of the pressurized heat sterilization tank 2 is changed to the time pressure shown in FIG. Control is performed so that the air content of the filled flexible packaging bag exceeds 2% while being within the region D. As a result, the filled flexible packaging bag can secure a sufficient head space therein, and the filling material is sufficiently stirred in the filled flexible packaging bag with the rotation of the rotating frame 203. Cooling is efficient and uniform.

[0030]

[Second Mode] The tray 1206 of the second embodiment of the present invention is
As shown in FIG. 6, it is the same as the above-mentioned embodiment that it is a rectangular parallelepiped formed by a plate material in which a plurality of circular holes are provided in an aluminum plate. The tray 1206 has a line-symmetrical shape with the center line S in the longitudinal direction of the rectangular parallelepiped as the central axis S, and each of the bottom plates 1230 of the double-bottom deformable structure has a horizontal portion 1232 in the central portion and inclined portions 1234 on both sides. And a heating fluid bottom channel 1236 is formed between the bottom plates 1230 having a double bottom structure. The side surface of the tray 1206 orthogonal to the central axis S also has a double structure, and a heating fluid side flow path (not shown) is formed therein. In the tray of the second embodiment of the present invention, it is not necessary to pay attention to the orientation of the upper and lower trays, that is, the inclination direction of the bottom plate when stacking, and the filled soft packaging bag accommodating portion whose vertical cross section is an isosceles triangle is always formed. it can. Further, the tray of the second embodiment of the present invention has an effect that a larger number of filled soft packaging bags can be heat-treated as compared with the tray of the first embodiment.

[0031]

[Brief description of drawings]

FIG. 1 is a perspective view of a rotary pressure heat sterilization tray according to a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of the stacked rotary pressure heat sterilization trays of the first aspect of the present invention.

FIG. 3 is an explanatory view of a rotary retort sterilizer using the rotary pressure heat sterilization tray of the present invention.

FIG. 4 is a cross-sectional view of the rotary retort sterilizer.

FIG. 5 is a graph showing a method of controlling the pressure and temperature in the pressure heat sterilization treatment tank of the above embodiment.

FIG. 6 is a vertical cross-sectional view of the rotary pressurized heat sterilization tray according to the second embodiment of the present invention.

[Explanation of symbols]

 S Center line 1 Rotary retort sterilizer 2 Pressurized heat sterilization treatment tank 3 Hot water tank 4 Storage unit 5 Control unit 201 Sterilization treatment drum 202 Bearing 203 Rotating frame 204 Rail 206 Tray 208 Cart 224 Opening doors 232, 234 Left and right side plates 236 238 front and rear side parts 240, 242 bottom plate 250 compartment 252, 254 partition plate 257 non-slip 270 bottom plate inclined part 272 bottom plate horizontal part 313 water supply source 320 steam supply source

Claims (8)

[Claims] 1. A soft packaging bag whose vertical cross section is an isosceles triangle is filled with a filling material and hermetically sealed to form a filled soft packaging bag, and the soft packaging bag is pressurized while being rotated in a pressure heat sterilization treatment tank. In a rotary pressure heat sterilization tray of a filled soft packaging bag to be heat sterilized, the tray is composed of right and left side plates in a plane parallel to the center line and front and rear side plates in a plane orthogonal to the center line. Having a rectangular parallelepiped outer shape, the tray further has a depth equal to half the width of the bottom of the filling soft packaging bag near the left and right side plates, and the height of the filling soft packaging bag from the left and right side plates. A rotary pressurizing heat sterilization tray having a bottom plate forming a filled soft packaging bag accommodating portion having a depth of 0 near a position separated by. 2. The rotary pressurized heat sterilization tray according to claim 1, wherein the front and rear side plates of the tray have a plurality of fluid passage holes. 3. The rotary pressure heat sterilization tray according to claim 1, wherein the left and right side plates of the tray have a plurality of fluid passage holes. 4. The rotary pressurization heat sterilization tray according to claim 1, wherein the left and right side plates of the tray have semicircular fluid passage holes at the upper and lower edge portions of the left and right side plates. 5. The height of the front and rear side plates and the left and right side plates of the tray is larger than 1/2 of the width of the bottom of the filling soft packaging bag, and the bottom plates are doubled. Item 1. A rotary pressure heat sterilization tray according to Item 1. 6. The length of the front and rear side plates of the tray is not less than twice the height of the filling soft packaging bag, and the filling soft packaging bag accommodating portions are formed in pairs. The rotary pressure heat sterilization tray according to claim 1. 7. The rotary pressurization heat sterilization tray according to claim 1, wherein the filled soft packaging bag accommodating portion of the tray has a depth of 0 at a position apart from the height of the filled soft packaging bag. . 8. The filling soft packaging bag accommodating portion of the tray has a plurality of fluid passage holes.
The rotary pressure heat sterilization tray described.