JP7448905B2 - Method for producing buckwheat husks subjected to heat insecticidal and egg killing - Google Patents

Description

Article 30, Paragraph 2 of the Patent Act applies Publication date: January 15, 2020 Publication: Chubu Keizai Shimbun Morning edition, January 15, 2020, page 3

The present invention mainly relates to a method for producing buckwheat hulls which are insecticidal and egg-killed by heat and filled into bags such as pillows and cushions.

BACKGROUND ART Buckwheat hulls, which have excellent moisture absorption and desorption properties, have been known to be filled into bags such as pillows and cushions (Patent Document 1).

The method for manufacturing buckwheat husks described in Patent Document 1 involves steaming the buckwheat hulls in a pressure cooker at a temperature of 100° C. or higher, and then drying the buckwheat hulls. This made it possible to kill insects and eggs laid by insects that were attached to the buckwheat husks.

Patent No. 3022366

However, in the manufacturing method described in Patent Document 1, the manufacturing cost increases due to the cost of fuel for the step of steaming in a pressure cooker. Furthermore, since a drying process is required since water vapor is used, drying in the sun is dependent on the weather. Furthermore, drying using a heater further increases manufacturing costs. In addition, when a large amount of buckwheat husks are put into a pressure cooker at once, the temperature tends to be uneven because the way the heat is transmitted differs depending on the location of the buckwheat husks. It is necessary to set it high, which has the problem of increasing manufacturing costs.

The present invention solves the above-mentioned conventional problems, and can shorten the manufacturing time and reliably kill insects and eggs laid by insects attached to buckwheat husks without increasing manufacturing costs. An object of the present invention is to provide a method for producing buckwheat husks that are subjected to insecticidal and ovicidal heat treatment.

In order to solve the above-mentioned conventional problems, the invention of claim 1, which is a method for producing buckwheat hulls subjected to heat insecticidal and egg killing, comprises a hopper for temporarily storing buckwheat hulls, a belt conveyor, and microwave irradiation. In the method for producing buckwheat husks that have been subjected to heat insecticidal and egg killing using a microwave irradiation machine equipped with a chamber, the buckwheat husks obtained by threshing buckwheat husks are passed through a sieve sorter to remove residual buckwheat and ova. A first step of separating garbage such as dust from buckwheat husks, a second step of supplying the sorted buckwheat husks to a belt conveyor in a stacked state with a constant thickness of 30 mm or more and 50 mm or less, and a belt conveyor. A third step of transporting the buckwheat husks supplied in In the fourth step of irradiating and heating , hot air of 80° C. or higher is supplied to the microwave irradiation chamber, and a buckwheat husk discharge port is provided at the bottom of the hopper used in the second step. The buckwheat husks temporarily stored in the buckwheat husks drop onto the surface of the belt conveyor from the buckwheat husk discharge port by gravity, and the buckwheat husks are placed in the vicinity of the buckwheat husk discharge port onto the belt conveyor. An adjustable thickness adjusting plate is fixed to the conveyor to feed the buckwheat husks at a constant thickness of 30 mm or more and 50 mm or less, and the hopper has a sensor attached at a predetermined position inside the hopper, and the buckwheat hulls. and a discharge port closing device for closing the discharge port, and when the sensor detects that the amount of buckwheat husks in the hopper has become less than a predetermined amount, the discharge port closing device is activated to close the discharge port. The feature is that the buckwheat husk discharge port is closed .

In the invention of claim 1, since the buckwheat husks are conveyed to the microwave irradiation chamber by a belt conveyor, the buckwheat husks can be continuously conveyed to the microwave irradiation chamber, and there is no need to stop the apparatus. , it is possible to produce buckwheat husks that have been subjected to heat-induced insecticide and egg killing in a short time, and it is possible to reduce production costs. Furthermore, since the buckwheat husks are heated by microwave irradiation, manufacturing costs can be reduced compared to heating using a conventional pressure cooker. In addition, by supplying hot air of 80°C or higher to the microwave irradiation chamber, it is possible to prevent the water vapor generated from buckwheat husks from condensing on the walls of the microwave irradiation chamber, and to kill insects and eggs using heat in a short period of time. It can be applied to buckwheat husks. Furthermore, it is possible to prevent temperature unevenness due to the position of the stacked buckwheat husks, and to heat the buckwheat husks to a required temperature.

The invention according to claim 2 is the method for producing buckwheat hulls subjected to heat insecticidal and ova killing according to claim 1, wherein guide plates are installed near both ends of the belt conveyor in the width direction, and the guide plate It is characterized by the fact that the soba husks are layered to a certain thickness to prevent them from collapsing .

The invention of the method for producing buckwheat husks subjected to insecticidal and ova killing by heat according to claim 1 or 2 is such that the buckwheat husks can be continuously transported to the microwave irradiation chamber, and the insecticidal and ova killing by heat can be carried out in a short time. It is possible to produce buckwheat husks that have been subjected to egg killing, and it is possible to reduce production costs. Further, it is possible to prevent the water vapor generated from the buckwheat husks from condensing on the wall surface of the microwave irradiation chamber, and the buckwheat husks can be subjected to heat-based insecticide and egg killing in a short time.

FIG. 2 is an explanatory diagram illustrating an overview of a method for producing buckwheat hulls subjected to heat insecticidal and ova killing according to the present invention. FIG. 1 is a front view schematically showing a microwave irradiation device used in the present invention. FIG. 1 is a plan view showing an outline of a microwave irradiation device used in the present invention. FIG. 2 is a partially enlarged perspective view showing details of the microwave irradiation device used in the present invention.

Embodiments of the present invention will be described below with reference to the drawings. Note that the present invention is not limited to this embodiment. FIG. 1 is an explanatory diagram showing an overview of the method for producing buckwheat hulls subjected to heat insecticidal and ovicidal according to the present invention. The method for producing buckwheat husks subjected to heat insecticidal and ova killing according to the present invention will be explained below using FIG. 1.

The method for producing buckwheat husks subjected to heat insecticidal and egg killing according to the present invention uses buckwheat husks that have been threshed from buckwheat berries in advance. In the first step, the sieve sorting machine 1 is used to separate the remaining buckwheat berries and dirt such as dust from the buckwheat husks.

The buckwheat hulls sorted in the first step are transported to the second step using a transport means such as an elevator (not shown). In the second step, the belt conveyor 2a of the microwave irradiation machine 2 is used to transport the buckwheat husks to the microwave irradiation chamber 2b. Therefore, the buckwheat husks can be continuously conveyed to the microwave irradiation chamber 2b, and there is no need to stop the microwave irradiation machine 2, so that buckwheat husks that have been subjected to heat-induced insecticide and egg killing can be produced in a short time. It is possible to reduce manufacturing costs.

In the third step, the buckwheat husks transported to the microwave irradiation chamber 2b in the second step are irradiated with microwaves to heat the buckwheat husks to 80° C. or higher. Moreover, in the third step, hot air of 80° C. or higher is supplied to the microwave irradiation chamber 2b. In the present invention, since the buckwheat husks are heated by microwave irradiation, manufacturing costs can be reduced compared to heating using a conventional pressure cooker. In addition, by supplying hot air of 80°C or higher to the microwave irradiation chamber 2b, it is possible to prevent the water vapor generated from buckwheat husks from condensing on the wall surface of the microwave irradiation chamber 2b, thereby killing and killing insects by heat in a short time. Eggs can be applied to buckwheat husks.

In the fourth step, the buckwheat husks heated in the third step by irradiating microwaves are cooled down, and then transferred to the buckwheat husk filling machine 3 using a transfer means such as an elevator (not shown). Buckwheat husks are filled into bags such as bags and cushions. Note that the fourth step is not an essential step in the method for producing buckwheat husks subjected to heat insecticidal and ova killing according to the present invention, and the buckwheat husks subjected to heat insecticidal and ova killing may be used for other purposes. The present invention also includes cases where

FIG. 2 is a front view showing an overall outline of the microwave irradiation device used in the present invention, and FIG. 3 is a plan view thereof. Moreover, FIG. 4 is a partially enlarged perspective view showing details of the microwave irradiation device. The microwave irradiation machine used in the method for producing buckwheat hulls subjected to heat insecticidal and ovicidal according to the present invention will be explained using these figures.

The microwave irradiation machine 2 includes a hopper 2c in addition to the aforementioned belt conveyor 2a and microwave irradiation chamber 2b. This hopper 2c has the function of temporarily storing the buckwheat husks sorted in the first step, and continuously supplies the buckwheat husks to the belt conveyor 2a in a stacked state with a constant thickness of 30 mm or more and 50 mm or less. It has the function of

Specifically, a buckwheat husk outlet 4 is provided at the bottom of the hopper 2c, and the buckwheat husks temporarily stored in the hopper 2c fall from the buckwheat husk outlet 4 to the surface of the belt conveyor 2a by gravity. do. A thickness adjustment plate 5 (see FIG. 4) is installed near the buckwheat hull discharge port 4, and a plurality of elongated holes 5a, 5a are formed in the vertical direction in the thickness adjustment plate 5. A plurality of bolts 5b, 5b fixed to the hopper 2c side are inserted into the elongated holes 5a, 5a, and the thickness adjusting plate 5 is attached to the hopper 2c by nuts 5c, 5c at predetermined positions of the elongated holes 5a, 5a. Fixed. This thickness adjusting plate 5 adjusts the thickness X of the fallen and stacked buckwheat husks from the surface of the belt conveyor 2a to a constant thickness of 30 mm or more and 50 mm or less. Therefore, temperature unevenness due to the position of the stacked buckwheat husks can be prevented, and the buckwheat husks can be heated to the required temperature.

Furthermore, a sensor is installed at a predetermined position inside the hopper 2c, and when the amount of buckwheat husks in the hopper 2c becomes less than a predetermined amount, the discharge port closing device 9 is activated to open the buckwheat hus discharge port. 4 will be closed. When it is detected by a plurality of sensors installed at predetermined locations of the microwave irradiation machine 2 that no buckwheat husks are placed on the belt conveyor 2a, the microwave is not irradiated in the microwave irradiation chamber 2b. It is structured as follows.

Further, guide plates 6, 6 are installed near both ends of the belt conveyor 2a in the width direction. The guide plates 6, 6 are installed to prevent the buckwheat husks stacked to a certain thickness from collapsing.

The microwave irradiation chamber 2b is equipped with a stirring blade 7 at the top. This stirring blade 7 is connected to a rotary motor 7b via a rotating shaft 7a, and in the process of irradiating microwaves, the stirring blade 7 is rotated, and this rotation reflects and disperses the microwave. Therefore, since the buckwheat husks can be heated by microwave irradiation for a short period of time, it is possible to reduce manufacturing costs and prevent temperature unevenness from occurring in the buckwheat husks.

The microwave irradiation chamber 2b is equipped with an exhaust hole 8. The exhaust hole 8 exhausts water vapor generated from the heated buckwheat hulls to the outside of the microwave irradiation chamber 2b during the microwave irradiation process. Therefore, buckwheat husks irradiated with microwaves can be dried in a short time. Note that a configuration may also be adopted in which a blower is installed in the exhaust hole 8 to forcibly exhaust water vapor.

In addition, in the step of irradiating microwaves, the output of the microwave in the microwave irradiation chamber 2b is preferably 2 kW or more and 8 kW or less, and the microwave irradiation time in the microwave irradiation chamber 2b is 1 minute or more and 5 minutes or more. It is preferable that it is below. This is a value obtained through experiments, and by setting the minimum microwave output required for insecticidal and ovicidal, it is possible to further reduce manufacturing costs. By setting the required minimum microwave irradiation time, it is possible to further reduce manufacturing costs.

Table 1 shows the experimental results when the width of the belt conveyor 2a was 500 mm, the thickness of the stacked buckwheat hulls from the surface of the belt conveyor 2a was 40 mm, and the stacked buckwheat hulls were continuously introduced into the microwave irradiation chamber 2b. As shown in Experiment 1 in Table 1, when the microwave output was 3 kW, the temperature of the buckwheat husks immediately after heating was 83°C. Furthermore, as shown in Experiment 2, when the microwave output was 6 kW, the temperature of the buckwheat husks immediately after heating was 101°C. In addition, as shown in Experiment 3, when the belt speed of the belt conveyor 2a was doubled compared to Experiment 2 and the passage time through the microwave irradiation chamber 2b was halved, the buckwheat husks immediately after heating The temperature was 86°C. When the buckwheat husks, which had a temperature of 80°C or higher immediately after heating, were sent to an inspection agency for analysis, the results showed that no animal foreign substances were detected.

According to the present invention, the method for producing buckwheat husks subjected to insecticidal and egg killing using heat is mainly used as a method for producing buckwheat husks to be filled into bags such as pillows and cushions.

1 Sieve sorter 2 Microwave irradiation machine 2a Belt conveyor 2b Microwave irradiation chamber 2c hopper 3 Buckwheat husk filling machine 4 Buckwheat husk discharge port 5 Thickness adjustment plate 5a Elongated hole 5b Bolt 5c Nut 6 Guide plate 7 Stirring blade 7a Rotating shaft 7b Rotating motor 8 Exhaust hole 9 Discharge port closing device X Thickness from belt conveyor surface

Claims (2)

In a method for producing buckwheat hulls subjected to heat insecticidal and egg killing using a microwave irradiation machine equipped with a hopper for temporarily storing buckwheat hulls, a belt conveyor, and a microwave irradiation chamber,
A first step of separating the buckwheat husks obtained by threshing the buckwheat husks from the remaining buckwheat husks and garbage such as dust using a sieve sorter;
a second step of supplying the sorted buckwheat husks to a belt conveyor in a stacked state with a constant thickness of 30 mm or more and 50 mm or less;
a third step of conveying the buckwheat husks supplied by a belt conveyor to a microwave irradiation chamber;
a fourth step of heating buckwheat husks by irradiating them with microwaves in a microwave irradiation chamber;
In the fourth step of heating by irradiating the microwave, hot air of 80° C. or higher is supplied to the microwave irradiation chamber,
A buckwheat husk outlet is provided at the bottom of the hopper used in the second step, and the temporarily stored buckwheat husks fall from the buckwheat husk outlet to the surface of the belt conveyor by gravity. In addition, an adjustable thickness adjusting plate is fixed near the buckwheat husk discharge port for supplying buckwheat husks to the belt conveyor at a constant thickness of 30 mm or more and 50 mm or less. ,
The hopper includes a sensor attached to a predetermined position inside the hopper, and a discharge port closing device that closes the buckwheat husk discharge port,
When the sensor detects that the amount of buckwheat husks in the hopper is less than a predetermined amount, the outlet closing device operates to close the buckwheat husk outlet. A method for producing buckwheat hulls subjected to insecticidal and ovicidal treatment. Claim 1 characterized in that guide plates are installed near both ends of the belt conveyor in the width direction, and the guide plates prevent the buckwheat husks stacked to a certain thickness from collapsing. A method for producing buckwheat husks subjected to heat insecticidal and egg killing as described in .

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