JP3241990U - Fungus bed cultivation bag - Google Patents

Abstract

[Problem] To eliminate the pressure difference between the inside and outside of a bag during heat sterilization without inserting another member, and to satisfactorily prevent hardening of the fungus bed inside the bag due to contraction of the bag due to the pressure difference. To provide a fungus bed cultivation bag capable of reducing the labor and shortening the time required for inoculating a seed fungus, and enabling the fungus bed cultivation at a low cost. A bag for fungal bed cultivation made of a plastic film, comprising a bag body 2 with an open upper end and a closed lower end, a vent hole 3 formed in the upper part of the bag body 2, and the vent hole. a filter 4 that is welded to the bag body 2 while covering the bag 3; It is preferable to have a second filter 6 welded to the bag body 2 while covering the cut 5 . [Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to a fungus bed cultivation bag used for artificial cultivation of mushrooms such as shiitake mushrooms and maitake mushrooms, and a method for manufacturing the fungus bed cultivation bag.

In recent years, when mushrooms are artificially cultivated, bags for mushroom bed cultivation made of plastic film have been widely used.

When artificially cultivating mushrooms using this type of fungus bed cultivation bag, first, an artificial medium (fungus bed) prepared by mixing a woody base material such as sawdust with a nutrient source such as rice bran to adjust the moisture content is prepared. It is filled in a fungus bed cultivation bag, sterilized by high-pressure steam or the like, and then mushroom spawn is inoculated into the fungus bed and cultured (cultivation step).

In the culturing step, mushroom hyphae grow on the fungal bed and form a coating on the fungal bed surface to prepare for the emergence of mushrooms.

Since the fungus bed cultivation bag is disposable, it is necessary to be inexpensive, and it is desirable that the bag be manufactured with as simple a structure as possible.

Moreover, when cultivating the mushroom spawn using the fungus bed cultivation bag, it is necessary to supply the air necessary for the growth of the fungus to prevent the intrusion of various germs.

Furthermore, in the artificial cultivation of mushrooms using a fungus bed cultivation bag, after the culturing step, the fungus bed is taken out from the fungus bed cultivation bag before the mushrooms are generated, and the mushrooms are grown (mushroom (fruiting body) generation step) is required.

Conventionally, as a fungal bed cultivation bag that satisfies the above requirements, the following configuration has been proposed. (See Patent Document 1, for example).

As shown in FIG. 8, the fungal bed cultivation bag disclosed in Patent Document 1 is made of a plastic that has an open upper end and is molecularly oriented such that the tensile strength in the vertical direction is greater than the tensile strength in the horizontal direction. A bag body 101 made of a film, a vent hole 104 formed in the upper part of the bag body 101, a filter 105 welded to the bag body while covering the vent hole, and allowing air to pass through and preventing germs from entering, It has

The bag body 2 is formed by gusset-folding both sides of a thin tube formed by inflation processing to form gusset portions 102 on both sides, and sealing (103) the lower end portion by welding to form a bag shape. Although not shown in FIG. 8, a breaking knob for breaking and tearing the bag body 2 was also provided.

JP 2015-8690 A

In the process of heating and sterilizing the fungus bed with high-pressure steam, the fungus bed is filled in the fungus bed cultivation bag, the upper end of the bag is closed, and a large number of fungus bed cultivation bags are placed on a trolley or the like at the same time and placed in the high pressure sterilization pot. It is carried in and sterilized by heating with high-pressure steam at a temperature of about 120° C. in the pot.

In the configuration of a conventional fungus bed cultivation bag such as that disclosed in Patent Document 1, when heat sterilization is performed in a high pressure sterilization pot, the pressure outside the fungus bed cultivation bag in the inner space of the pot is reduced by high pressure steam, A difference is generated between the air pressure inside the bag for fungal bed cultivation. Due to the difference in air pressure between the inside and outside of the bag for fungal bed cultivation, the bag for fungal bed cultivation shrinks and the fungal bed in the bag becomes hard, hindering the generation and growth of mushroom hyphae in subsequent steps. There was a risk that the mushrooms could not be cultivated well due to the

In order to eliminate the compression and hardening of the fungus bed due to the shrinkage of the fungus bed cultivation bag due to the pressure difference during heat sterilization, conventionally, after filling the fungus bed inside the fungus bed cultivation bag, a straw or string is used. , a member for preventing bag shrinkage such as urethane is separately inserted into the fungal bed cultivation bag and the bag is folded.

However, in the conventional method of inserting a member such as urethane to prevent shrinkage of the fungus bed cultivation bag, (1) in the step of filling the fungus bed culture bag with the fungus bed, a large number of fungus bed cultivation bags are filled with urethane. (2) After heat sterilization, it is necessary to remove the member such as urethane before inoculating the mushroom spawn into the fungus bed, and (3) a separate The number of members to be inserted to prevent shrinkage is the same as that of the bags for fungal bed cultivation, and the management is complicated.

The present invention was made in order to solve the above problems, and it is possible to eliminate the pressure difference between the inside and outside of the bag during heat sterilization without inserting another member, and the pressure difference causes the bag to shrink. To provide a fungus bed cultivation bag capable of satisfactorily preventing the hardening of the bed, reducing the labor and shortening the time required for a heat sterilization process and a mushroom spawn inoculation process, and enabling the fungus bed cultivation at a low cost. for the purpose.

In order to solve the above problems, the bag for fungal bed cultivation 1 according to the present invention is a bag for fungal bed cultivation formed from a plastic film, and includes a bag body 2 having an open top end and a closed bottom end, and the bag body. 2, a filter 4 welded to the bag body 2 while covering the ventilation hole 3, and a filter 4 in the upper part of the bag body 2 near the ventilation hole 3 and a pressure difference elimination means 8 provided.

Moreover, the pressure difference elimination means 8 may include a cut 5 formed in the upper portion of the bag body 2 .

The cut 5 may consist of a single linear cut.

Moreover, the cut 5 may be composed of a plurality of linear cuts that intersect with each other.

Further, the pressure difference elimination means 8 may have a second filter 6 welded to the bag body 2 while covering the cut 5 .

According to the present invention, there is provided a fungal bed cultivation bag formed from a plastic film, comprising a bag body having an open top end and a closed bottom end, a vent hole formed at the top of the bag body, and the vent hole. A filter that is welded to the bag body in a covered state and prevents the invasion of germs while allowing air to pass; When a pressure difference occurs between the inside and outside of the bag during heat sterilization, the pressure difference elimination means is provided so that the inside and outside of the bag body can be ventilated so as to eliminate the pressure difference. Also, during heat sterilization, the pressure difference between the inside and the outside of the bag body is less likely to occur, and it is possible to satisfactorily prevent the bacteria bed from hardening due to contraction of the bag. As a result, the heat sterilization step and the mushroom spawn inoculation step can be performed with reduced labor and shortened time, and at the same time, fungal bed cultivation can be performed at low cost.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows the structure of the bag for mushroom bed cultivation in one embodiment of this invention. FIG. 2 is a front view of the fungus bed cultivation bag of FIG. 1 with the filter removed. 1. It is a perspective view which shows the state which is culture|cultivating the mushroom spawn using the bag for mushroom bed cultivation of FIG. FIG. 3 is a front view showing another example of cuts in the fungus bed cultivation bag of FIG. 1 ; FIG. 3 is a front view showing another example of cuts in the fungus bed cultivation bag of FIG. 1 ; FIG. 3 is a front view showing another example of cuts in the fungus bed cultivation bag of FIG. 1 ; FIG. 3 is a front view showing another example of cuts in the fungus bed cultivation bag of FIG. 1 ; It is explanatory drawing of the conventional fungal bed cultivation bag.

The present invention will be described in more detail below using preferred embodiments. However, the following embodiments are merely examples embodying the present invention, and the present invention is not limited thereto.

[Structure of Bag for Fungal Bed Cultivation]
First, the configuration of a fungal bed cultivation bag according to an embodiment of the present invention will be described with reference to FIGS. 1 to 7. FIG.

As shown in FIG. 1, a fungal bed cultivation bag 1 of the present embodiment includes, for example, a bag body 2 made of a plastic film having an open upper end and a closed lower end, and a passage formed in the upper part of the bag body 2. It has air holes 3 and a filter 4 which is welded to the bag body 2 while covering the air holes 3 and allows air to pass therethrough and prevents germs from entering. Further, in this embodiment, a cut 5 provided in the upper portion of the bag body 2 and a second filter 6 that is welded to the bag body 2 while covering the cut 5 are provided.

The fungus bed cultivation bag 1 may be provided with a rupturing knob for breaking and tearing the bag body 2 to take out the fungus bed from the bag body, perforations, or the like.

The bag main body 2 is made into a bag shape by, for example, folding both sides of a thin tube formed by inflation processing into gussets and sealing the lower end by heat welding.

That is, the bag body 2 includes body surface portions 20 and 21 facing each other in the front and back, V-shaped folded gusset portions 22 connected to both sides of the body surface portions 20 and 21, front and rear body surface portions 20 and 21, and both sides of the body surface portions 20 and 21. A bottom seal portion 23 is formed by heat-sealing the lower ends of the folded gusset portions 22 on one side, and the bag-like body is closed at the lower end by the upper end opening. In addition, in the drawing, the seal portion is indicated by a thick line for explanation.

The body surfaces 20 and 21 are formed in, for example, a vertically long rectangular shape. When the bag main body 2 is unfolded, the lower end portions of the body surfaces 20 and 21 are bent to form a square bottom gusset. Folded gusset portions 22 are formed integrally on the left and right side sides of the body surface portions 20 and 21, which are overlapped in the front-rear direction.

Therefore, the folded gusset portion 22 is composed of a first gusset piece 25 connected to both sides of one (front) body surface portion 20 and the other (rear) body surface portion. and a second gusset piece 26 connected to both sides of 21 .

The bottom seal portion 23 is formed in a state in which the lower end sides of the front and rear body surfaces 20 and 21 and the first and second gusset pieces 25 and 26 of the folded gusset portion 22 are overlapped, and the bottom seal portion 23 is linearly formed along the lower sides of the body surfaces 20 and 21 . It is formed by heat welding in a shape.

An inclined seal portion may be formed on the lower side of the bag main body 2 and is heat-welded to the bottom seal portion 23 in an inverted V shape in an inclined direction. In the case of a configuration in which an inclined seal portion is provided, when the inside is filled with a fungal bed such as sawdust, the fungal bed is reliably prevented from entering the triangular overlapped portion, and the mycelia are prevented from entering the excess portion. It is possible to satisfactorily prevent the film formed on the surface of the fungus bed from being damaged when the fungus bed is taken out from the bag body without stretching.

As the material for the bag body 2, polyolefin materials such as polypropylene and high-density polyethylene, which are inexpensive and can withstand sterilization by high-pressure steam or the like, or polyester materials are preferable.

In addition, the bag body 2 is preferably transparent or translucent so that the state of culture of the mushroom spawn can be observed.

As also shown in FIG. 2 , the ventilation hole 3 is formed in a circular shape on the upper side of one of the trunk portions 20 . The ventilation hole is provided at a position above the filling height when the bag body 2 is filled with the fungus bed. The shape of the vent hole 3 is not limited to a circle, and may be any shape such as a polygon such as a pentagon, an ellipse, or the like.

In this embodiment, the filter 4 is formed in a rectangular shape. However, the shape of the filter is not limited to a rectangular shape, and may be any shape such as a polygon such as a pentagon, a circle, or an ellipse.

It should be noted that the filter 4 does not have to completely prevent the intrusion of various germs, as long as it can prevent the growth of the hyphae of the mushroom spawn. The filter 4 can withstand sterilization by high-pressure steam or the like and can be hermetically welded to the material of the bag body 2. For example, commercially available porous plastic filters, non-woven fabric filters, etc. can be used. can.

As shown in FIG. 1, the filter 4 is welded to the bag main body 2 after it is placed in a state of covering the vent hole 3 . In FIG. 1, reference numeral 7 indicates a welded portion. The position where the filter 4 is arranged is set at the upper part of the bag body 2, preferably at a position where it is not folded when the upper end opening of the bag body 2 is folded in order to avoid contamination of germs.

As shown in FIG. 1, the filter 4 is welded to the bag main body 2 after it is placed in a state of covering the vent hole 3 . In FIG. 1, reference numeral 5 indicates a welded portion. The position where the filter 4 is arranged is the upper part of the bag body 2, preferably a position where it is not folded when the upper end opening of the bag body 2 is folded in order to avoid contamination of germs.

The notch 5 is provided in the upper part of the bag body 2 and in the vicinity of the vent hole 3 . The cut 5 is formed, for example, by cutting the plastic film bag body 2 with a cutter or the like.

The notch 5 is normally in a substantially closed state, and when a pressure difference occurs between the inside and outside of the bag body 2 during heat sterilization, it ventilates the inside and outside of the bag body 2 so as to eliminate the pressure difference. It is pressure difference elimination means 8 .

The pressure difference elimination means 8 is a ventilation means different from the ventilation hole 3, and functions like a ventilation valve for ventilation only during the heat sterilization process of the fungus bed, for example.

In this embodiment, unlike the vent hole 3 which is always open, the pressure difference elimination means 8 is composed of the cut 5, so that the pressure difference between the inside and outside of the bag body is generated by high-pressure steam during autoclave sterilization. It is designed to allow air to flow in and out.

The incision 5 is, for example, a single linear incision with a length of about 1 to 30 mm. The formation position of the cut 5 is provided at a position about 3 cm from the lower end of the vent hole 3 .

The position of the notch 5 is not limited to the position below the ventilation hole, and may be formed in any position such as a lateral direction, an upward position, or an oblique position. As shown in FIG. 3, the notch 5 is preferably formed at a position above the upper end of the bag body 2 filled with the fungus bed.

In addition, as shown in FIGS. 4, 5, 6 and 7, the incisions 5 are, for example, cross-shaped incisions (see FIG. 4), x-shaped incisions (see FIG. 5), or V-shaped incisions. It may be formed by a cut (see FIG. 6) or a curve such as an arc (see FIG. 7). In addition, a U-shaped cut, three or more crossed cuts, or any other shape may be used.

Also, the number of cuts 5 is not limited to one, and a plurality of cuts may be formed. For example, it may be formed on both the front and back trunk surfaces 20 and 21 of the bag body 2 .

The second filter 6 is formed in a rectangular shape large enough to cover the cut 5 . Like the filter 4, the second filter can prevent invasion of germs while allowing air to pass through. The second filter 6 can withstand sterilization by high-pressure steam or the like and can be hermetically welded to the material of the bag body 2. For example, commercially available porous plastic filters, non-woven fabric filters, etc. can be used. can do.

Even if the second filter 6 does not completely prevent the intrusion of various germs, it is sufficient that it can prevent the growth of the hyphae of the mushroom spawn. Moreover, the shape of the second filter 6 is not limited to a rectangular shape, and may be any shape such as a polygon such as a pentagon, a circle, or an ellipse.

It should be noted that the pressure difference elimination means 8 is not limited to the structure in which the bag body is directly cut as described above. For example, an opening of a certain size may be provided in the upper portion of the bag body, and a plastic film sheet with cuts formed thereon may be welded and fixed so as to cover the opening. At this time, a joint sheet is formed by previously welding the plastic film sheet having the cut and the second filter, and the joint sheet is welded to the bag body to fix the cut and the second filter at the same time. may be

[How to use the fungus bed cultivation bag]
Next, a method of using the fungal bed cultivation bag 1 in one embodiment of the present invention will be described.

In the artificial cultivation of mushrooms, as shown in FIG. 3, an artificial medium (fungus bed 9) prepared by mixing a nutrient source such as rice bran with a wood base material such as sawdust to adjust the water content (fungal bed 9) is first prepared for fungal bed cultivation. The bag main body 2 of the bag 1 is filled and sterilized by heating with high pressure steam at about 120° C. for about 2 hours.

During this heat sterilization, if a pressure difference occurs between the outside pressure of the bag body 2 and the inside pressure of the bag body 2 due to the high-pressure steam, the notch 5 as the pressure difference elimination means 8 opens and the air can enter and exit. As a result, since the pressure difference between the inside and outside of the bag body 2 is eliminated, the contraction of the fungus bed cultivation bag 1 can be prevented, and the hardening of the fungus bed 9 inside the bag can be prevented satisfactorily.

Next, the sterilized mushroom bed 9 is inoculated with the mushroom spawn, and the upper end opening of the bag body 2 is heat-sealed and closed. Then, the mushroom bed 6 inoculated with the mushroom spawn is stored in a culture room at a temperature of about 24° C. and a humidity of about 60% for 30 to 90 days while being filled in the bag body 2 of the bag for mushroom bed cultivation 1 (cultivation process ).

When the mycelium has almost spread over the mycelium bed 9 (when the culture process is completed), the mycelium bed 9 is taken out from the bag body 2 of the bag for fungus bed cultivation 1, and mushrooms (children) are grown in an environment with a temperature of about 18° C. and a humidity of about 90%. (Mushroom (fruiting body) development process).

When the mushrooms generated from the fungal bed grow to some extent, they are harvested as appropriate.

REFERENCE SIGNS LIST 1 bag for fungal bed cultivation 2 bag body 3 body surface 4 filter 5 notch 6 second filter 8 pressure difference elimination means

Claims (6)

A fungus bed cultivation bag formed from a plastic film,
a bag body having an open upper end and a closed lower end;
a ventilation hole formed in the upper part of the bag body;
a filter welded to the bag body while covering the air vent;
a pressure difference elimination means provided in the upper part of the bag body and in the vicinity of the air hole. 2. The bag for mushroom bed cultivation according to claim 1, wherein the pressure difference elimination means includes a notch formed in the bag body. 3. The fungus bed cultivation bag according to claim 2, wherein the pressure difference elimination means has a second filter that is welded to the bag body while covering the notch. 2. The bag for fungal bed cultivation according to claim 1, wherein the bag body has a breaking tab and perforations for taking out the fungal bed from the bag body. 2. The bag for fungal bed cultivation according to claim 1, wherein an inclined seal portion is formed in the lower part of the bag body in an inverted V shape and is heat-sealed in an inclined direction. 2. The bag for mushroom bed cultivation according to claim 1, wherein the bag body is transparent or translucent.

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