JPH10304838A - Washing of machine for producing food - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perfectly wash a stain adhered to a site stained with protein films in a machine for producing a food. SOLUTION: This method for washing a machine for producing a food comprises washing a stained site with a detergent for washing protein films and again washing the pre-washed site with the aqueous solution of one or more kinds of compounds selected from thiosulfate salts (e.g. sodium thiosulfate), bisulfite salts (e.g. sodium bisulfite) and sulfite salts (e.g. sodium bisulfite).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a part contaminated by a protein film in a food manufacturing machine, for example, a piping pipe or a heat exchanger of a milk sterilization line (UHT), a soymilk storage tank of a tofu manufacturing machine, and a tofu. The present invention relates to a method for cleaning a mold box for dehydration molding.

[0002]

2. Description of the Related Art As a method of this type, when a mold box of a tofu manufacturing machine is washed, a detergent for cleaning a protein film is attached to the surface of the mold box, and industrial water or tap water is sprayed on the detergent. Are known.

[0003]

According to the above method, the protein film adhering to the mold box can be removed. However, in addition to the protein film, the mold box is translucent (milky white).
Stain such as stains adhered and could not be removed with detergent. Although the nature of the stain is unclear, the tofu adheres to the stain, and when the tofu is removed from the mold box, a portion of the attached tofu is peeled off and remains in the mold box. It became a defective product lacking a part, lost its commercial value, and could not be shipped.

[0004] It is an object of the present invention to provide a method of cleaning a food manufacturing machine, which can clean all dirt attached to a portion of the food manufacturing machine that is contaminated by the proteinaceous film.

[0005]

A method for cleaning a food manufacturing machine according to the present invention is a method for cleaning a portion of a food manufacturing machine that is contaminated with a proteinaceous film. And then using one or more aqueous solutions of thiosulfate, bisulfite and sulfite.

[0006] The thiosulfate, bisulfite and sulfite may be used separately or in combination.

In the method for cleaning a food production machine according to the present invention, one or more aqueous solutions of thiosulfate, bisulfite and sulfite are used for the detergent for cleaning a proteinaceous film. All dirt adhering to the portion contaminated by the proteinaceous film can be removed.

Preferably, the thiosulfate is sodium thiosulfate, the bisulfite is sodium bisulfite, and the sulfite is anhydrous sodium sulfite.

[0009] The use of sodium thiosulfate has the most remarkable effect in removing dirt, and the use of sodium bisulfite or sodium sulfite having the same properties as above can provide the effect of removing dirt.

An example of a food production machine is a tofu production machine.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the embodiment of the present invention is applied to a mold box of a tofu manufacturing machine will be described with reference to the drawings.

Referring to FIG. 1, a mold box 11 includes a vertically elongated rectangular parallelepiped mold box main body 12 and a holding lid 13 which is vertically movably fitted therein. Box body 12 and presser lid 13
Are made of a stainless steel plate having a thickness of 0.6 mm.
The stainless steel plate may be coated with Teflon or coated with nylon or silicone resin.

The box body 12 is composed of a body wall 21 and a bottom wall 22 and the volume of one tofu to be molded is 400 cc.
It has a capacity to accommodate 750 cc of coagulated soymilk.
An upward tapered portion 23 is provided at the upper edge of the opening of the body wall 21. A large number of dehydration holes 24 are formed at a predetermined pitch in a lower portion of the body wall 21. The pitch of the dewatering holes 24 is 4 mm, and the diameter is 0.8 mm. The level of the top dewatering hole 24 is
It matches the top level of tofu after dehydration molding. A dewatering hole 25 is formed in the bottom wall 22 in the same manner. The pitch of the bottom wall dewatering holes 25 is 2.5 mm, and the diameter is 0.8 mm. The presser lid 13 is a rectangular flat plate having an outer periphery which is deflected by the inner surface of the body wall 21 of the mold box main body. . A large number of dehydration holes 33 are formed almost all over the holding lid. This dehydration hole
The pitch of 33 is 1.2 mm and its diameter is 0.8 mm. A saddle-shaped holder 34 rising from the four corners is fixed to the upper surface of the holding lid 13. A vertical bar-shaped shank 35 is fixed to the center of the top surface of the holder 34.

FIGS. 2 and 3 show a tofu making machine using the above mold box.

The tofu making machine includes a mold box conveyor 42 and a presser lid conveyor 43 arranged in a chamber 41 in parallel.

The mold box conveyor 42 includes a right drive sprocket 51
And left driven sprocket 52 and these sprockets 5
There is provided an endless chain 53 which is wound around 1, 52 and has a large number of mold box bodies 12 attached thereto at predetermined intervals.

The presser cover conveyor 43 includes a large-diameter drive sprocket 61 and small-diameter driven sprockets 62 arranged at appropriate positions on the left side thereof, an endless chain 63 wound around these sprockets 61, 62, and a chain.
A large number of holders 64 are attached to the main body 63 at predetermined intervals and hold the presser lid 13 in a detachable manner.

At the beginning of the upper moving path of the mold box main body 12, a coagulated soybean milk supply chute 71 is arranged. A presser cover supply device 72 is arranged from the middle of the upper movement path to near the start of the upper movement path of the holder 13. The tofu extracting device 73 is arranged from the middle of the lower movement path of the mold box main body 12 to the middle of the upper movement path of the holder 13. A movable detergent nozzle 74 is arranged on the lower movement path of the mold box main body 12 downstream of the tofu extracting device 73, and a movable washing water nozzle 75 is arranged on the downstream side of one station. The detergent nozzle 74 and the washing water nozzle 75 are both movable up and down so as to be able to move in and out of the mold box body 12.

A container supply device 81 is arranged near the end of the upper moving path of the holder 13. A tofu discharge chute 82 is arranged in the middle of the reversing path from the end of the upper moving path of the holder 13 to the end of the lower moving path. Below the tofu discharge chute 82, a discharge conveyor 83 is arranged.
A fixed detergent nozzle 84 is arranged downstream of the tofu extracting device 73 on the lower moving path of the holder 13 and a fixed washing water nozzle 85 is arranged downstream of the station 13 with one station.

From the coagulated soy milk supply chute 71 to the mold box conveyor
The coagulated soybean milk M is put into the twelve mold box bodies. When the mold box main body 12 containing the coagulated soy milk M is transported to the press cover supply device 72, the press cover 13 is applied to the same box main body 12 by the press cover supply device 72. Thereafter, a pressing force is applied to the holding lid 13 by an elastic means (not shown), and the tofu extracting device 73 is provided.
The coagulated soybean milk M is dehydrated into tofu B while being transported to the position. The tofu extracting device 73 is provided with the tofu B in the mold box body 12.
Is taken out while being placed on the presser lid 13, transferred from the mold box conveyor 42 to the presser lid conveyor 43, and held by the holder 64. The container C is put on the tofu B placed on the holding lid 13 held by the holder 64 by the container supply device. The tofu B covered with the container C is turned up and down while moving along the reversing path from the upper side to the lower side of the holder 64, falls down on the holding lid 13, and is moved to a predetermined place by the chute 82 and the conveyor 83. Conveyed.

A detergent is sprayed from a nozzle 74 to the mold box main body 12 from which the holding lid 13 has been removed together with the tofu B by the tofu extracting device 73, and then washing water is sprayed from a nozzle 75. The detergent is a weakly alkaline agent containing caustic soda as a main component, and is, for example, Ecrine 47 or Ecline 110F (trade name, manufactured by Riko Kogyo Co., Ltd.). Instead of caustic soda, sodium carbonate may be used. This detergent is used as a 0.2% aqueous solution, which is heated to 80 ° C. for use. The degree of detergent spraying is 2 to 1 mold box body.
It is 10 to 15 ml per 4 seconds, and the entire surface of the mold box body 12 may be lightly wetted. The washing water is prepared by diluting a 10% aqueous solution of sodium thiosulfate, which is a thiosulfate, to a concentration of 0.3 to 5 ppm and heating to 50 to 80 ° C. For each mold box main body, spray the detergent vigorously with 3 to 5 liters of the washing liquid for 10 to 15 seconds.

Examples of the thiosulfate include sodium thiosulfate, potassium thiosulfate, magnesium thiosulfate, and calcium thiosulfate. Further, bisulfite or sulfite may be used instead of thiosulfate. Examples of bisulfites include sodium bisulfite, potassium bisulfite, magnesium bisulfite, and calcium bisulfite. Examples of the sulfite include sodium sulfite, potassium sulfite, magnesium sulfite, and calcium sulfite.

The presser lid 13 that has passed through the reversing path and turned upside down becomes the upright position again by rotating the holder 64 by 180 degrees by means not shown. Thereafter, the presser lid 13 is sprayed with a detergent from the nozzle 84, and then the nozzle 85 is sprayed with cleaning water. The detergent and cleaning water are the same as those used for cleaning the mold box main body 12. Detergent spraying is 5 to 10 ml per 2 to 4 seconds, and washing water is sprayed to 1 to 2 liters per 1 to 2 seconds per presser lid.
Of degree.

After spraying the washing water, tap water or factory water may be sprayed to wash out the washing water.

FIG. 4 shows a system for sending washing water to the washing water nozzles 75 and 85. The cleaning water tank 91 is connected to a liquid supply pipe 93 extending from a chemical solution tank 92 and a water supply pipe 94 extending from a water source such as tap water or factory water. The liquid supply pipe 93 is provided with a metering pump 95. An on-off valve 96 is provided at an outlet end of the water supply pipe 94. The on-off valve 96 is provided with a float 97. The cleaning water tank 91 and the nozzles 75 and 85 are connected by a cleaning liquid pipe 98. The washing liquid pipe 98 is provided with a metering pump 101 and a heat exchanger 102.

The chemical solution tank 92 stores a 10% concentration chemical such as sodium thiosulfate. The chemical liquid is sent to the washing water tank 91 by a constant amount by the pump 95. On the other hand, when the valve 96 is opened and closed by the float 97, the liquid level in the cleaning liquid tank 91 is controlled to be constant. The washing water sent from the washing liquid tank 91 by the pump 101 is heated by the heat exchanger 102 and then sent to the nozzles 75 and 85.

The proteinaceous film formed on the surfaces of the mold box body 12 and the cover 13 is completely removed by the detergent and the washing water. If industrial water or tap water not containing sodium thiosulfate or the like is used as the washing water, dirt cannot be removed. Dirt, mold box body 12
This tends to occur in the portion where the presser lid 13 slides (the portion indicated by hatching D in FIG. 1), and tofu tends to adhere to this portion. If the presser lid 13 is removed from the mold box main body 12 with the tofu attached to the dirt, a part of the removed tofu will be missing,
If a mixture of water and sodium thiosulfate is used as washing water, dirt is completely removed.

[0028]

According to the present invention, it is possible to clean all dirt adhering to a portion contaminated by a proteinaceous film in a food manufacturing machine.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a mold box used for carrying out the present invention.

FIG. 2 is a vertical vertical sectional view of the periphery of a mold box conveyor of a tofu making machine using the same mold box.

FIG. 3 is a vertical vertical cross-sectional view of the periphery of a presser lid conveyor of the tofu manufacturing machine.

FIG. 4 is an explanatory diagram of a system for sending washing water to the tofu manufacturing machine.

[Explanation of symbols]

 11 type box 12 type box body 13 presser lid

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takahiro Miyawaki, No. 10 Taro, Yasu, Taro, Kitajima-cho, Itano-gun, Tokushima Prefecture Inside Shikoku Kakoki Co., Ltd. (72) Inventor: Michio Ueda, No. 10 Taro Yasu, Nishi-no-kawa, Tenno-gun, Itano-gun, Tokushima Pref.

Claims (3)

[Claims] Claims: 1. A method for cleaning a portion contaminated by a proteinaceous film in a food production machine, comprising the steps of:
A method for cleaning a mold box for dehydration and dehydration of a tofu, comprising using a detergent for cleaning a proteinaceous film, and then using one or more aqueous solutions of thiosulfate, bisulfite and sulfite. 2. The method according to claim 1, wherein the thiosulfate is sodium thiosulfate, the bisulfite is sodium bisulfite, and the sulfite is anhydrous sodium sulfite. 3. The method for cleaning a food production machine according to claim 1, wherein the food production machine is a tofu production machine.