JPH0259712B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a continuous production apparatus for bean curd, and more particularly to a continuous production apparatus capable of improving the quality of tofu.

[Prior art] Yuba, which is obtained by heating soy milk and collecting the coagulated thin film that forms on the liquid surface, is widely known as a traditional food in Japan. It is also attracting attention as a health food rich in vegetable fats.

Conventionally, to produce yuba, soybeans are soaked in water, then ground and filtered to obtain soymilk, which is then poured into a heating tank and heated at a temperature of about 90°C for 10 to 15 minutes. Then, the solidified thin film formed on the liquid surface was scooped up one by one with a stick and dried.

However, in this classical method for producing Yuba, the work is complicated, and furthermore, it is time-consuming because the Yuba is scooped out one by one after a thin film has solidified on the surface of the liquid, and it is difficult to make it continuous.

Therefore, in the past, various improvements have been made to the yuba manufacturing equipment (Japanese Patent Application Laid-Open No. 1973-
22844, JP 54-80448, JP 55-50872).

For example, Japanese Patent Laid-Open No. 51-22844 discloses the following apparatus for producing yuba.

That is, as shown in FIG. 9, soy milk 12 is poured into the soy milk tank 10, and a heating device 14 is installed at the bottom of the soy milk tank 10.

Then, the liquid level 1 of the soymilk 12 in the soymilk tank 10 is
2a is coated with a film 16 that is permeable to water vapor.

In this state, when the soybean milk 12 in the soybean milk tank 10 is heat-treated by the heating device 14, a coagulated thin film 18 is formed on the liquid surface 12a of the soybean milk 12.

The coagulated thin film 18 is adhered to the film 16 with a suitable adhesive force, and when the film 16 is pulled up, the coagulated thin film 18 is also pulled up together with the coagulated thin film 18, and after the film 16 is pulled up, the coagulated thin film 18 is easily peeled off naturally. Then, it is subjected to a subsequent drying process.

Therefore, according to this device, it becomes easy to pull up the solidified thin film, and it is also possible to achieve continuous production.

[Problems to be Solved by the Invention] Problems of the Prior Art However, in this method of producing bean curd skin, there is a problem that it takes a long time to form a coagulated thin film on the surface of the soybean milk liquid. It was hot.

That is, the formation of a coagulated thin film on the surface of the soybean milk liquid is thought to be due to the evaporation of water at the liquid surface, which increases the protein concentration at the liquid surface and causes mutual reactions. However, if the surface of the soymilk liquid is coated with a film, even if the film has excellent water vapor permeability, the evaporation of water from the liquid surface will be significantly delayed, and if the soymilk concentration is constant, a thin film will coagulate. It takes several times as much time to form.

In addition, with the conventional method of retaining soymilk in a soybean milk tank and heating the soymilk, as the number of coagulated thin films increases, the composition of the residual liquid changes, making it impossible to maintain a constant quality. There were also some problems.

In other words, soy milk contains a mixture of components that coagulate easily and components that tend to remain soluble in the residual liquid, and as the coagulated thin film is removed, the concentration of non-coagulable components in the residual soy milk increases. It is.

Furthermore, the long-term heating causes changes in the composition of the soymilk itself, making it impossible to continuously collect high-quality coagulated thin films.

As a result, the quality of the dried bean paste obtained by collecting and drying the coagulated thin film is not stable, resulting in low product value.

OBJECTS OF THE INVENTION The present invention has been made in view of the problems of the prior art described above, and its purpose is to provide an apparatus for efficiently and continuously producing bean curds of stable quality.

[Means for Solving the Problems] In order to achieve the above object, the continuous production device for yuba according to the present invention is arranged in a line along a long film, and injects soybean milk in a thin layer onto the film, The film is characterized by comprising a plurality of solidified thin film forming sections that perform a subsequent heat treatment to form a solidified thin film, and a film moving section that moves the long film in steps after the solidified thin film is formed on the film. do.

[Function] Since the continuous production device for bean curd skin according to the present invention has the above-described means, soymilk is injected in a thin layer onto the long film at each coagulated thin film forming section arranged in alignment along the long film. . Then, the soymilk becomes a coagulated thin film by heat treatment.

Next, the long film is moved stepwise in its longitudinal direction by the film moving section, each solidified thin film forming section faces a new film section, and the above-described operation is repeated.

As a result, coagulated thin films of soybean milk are formed on the long film at predetermined intervals, and further, by drying the coagulated thin films, it becomes possible to continuously produce bean curd.

At this time, unlike conventional production equipment, the soymilk is poured onto a film, so the film does not hinder the evaporation of water from the soymilk, and a thin solidified film is formed in an extremely short time.

In addition, the amount of soymilk that forms one sheet of bean curd is injected onto the film in a thin layer, which is different from the conventional method of heating a large amount of soymilk and collecting a solidified thin film from the liquid surface. In contrast, the concentration of non-coagulated components in the residual liquid does not increase, or the soymilk itself does not deteriorate due to long-term heating.

Furthermore, the solidified thin film formed on the film is easy to handle, and the conventional process of lifting it from a soybean milk vat is not required, making it easy to manufacture.

As explained above, according to the present invention, it is possible to continuously form solidified thin films one by one on a long film, so it is possible to continuously produce bean curds of consistently stable quality in a short period of time.

[Examples] Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

FIG. 1 shows an apparatus for continuously producing yuba according to an embodiment of the present invention, and FIG. 1A is a top view thereof;
Figure B is a side sectional view thereof.

The apparatus according to this embodiment has three coagulated thin film forming parts 32a, 32b, 3 arranged in a row in a heating tank 30.
2c, a film roller 34, and a take-up roller 36 as a film moving section.

A long film 38 is fed out from the film roller 34, and the other end of the long film 38 is locked to a take-up roller 36.

Hot water 40 is retained in the heating tank 30, and the hot water 40 is heated by a steam heating pipe 42 and is always set at 80 to 90°C.

Note that the long film 38 is attached to the guide roller 4.
4a, 44b, and 44c to a predetermined position, and a tension roller 46 applies a predetermined tension.

Further, the apparatus according to the present embodiment has a cloth roller 48 and is configured such that a cloth 49 sent out from the cloth roller 48 is coated on the surface of the film 38 and is wound around the take-up roller 36.

The apparatus according to this embodiment is roughly constructed as described above, and its operation will be explained next.

A solidified thin film 18 is formed on the long film 38 fed out from the film roller 34 by solidified thin film forming sections 32a, 32b, and 32c as described later.
is formed.

Once the solidified thin film 18 is formed, the take-up roller 36
is rotationally driven by a drive motor (not shown), and winds up the film 38.

At this time, the amount of film winding per time is
The corresponding area lengths are 2b and 32c.

Here, the coagulated thin film 18 on the long film is covered with a cloth 49 sent out from a cloth roller 48 when being wound up by the take-up roller 36 .

This cloth 49 adjusts the moisture content of the coagulated thin film 18 on the film wound around the take-up roller 36.

Therefore, the cloth 49 is preferably made of cotton or the like, which has excellent moisture absorption.

The solidified thin film 18 collected as described above is
A predetermined aging is performed while the film 38 and the cloth 49 are wound up on the take-up roller 36,
After this aging, it is peeled off from the film and becomes Yuba.

Here, the continuous production device for yuba according to the present invention includes:
It is characterized by injecting a thin layer of soy milk onto the film and then heating it to form yuba.
As the film, a polyvinylidene chloride resin coating is suitable.

In addition, the thin layer thickness of soy milk needs to be set appropriately depending on the soy milk concentration and the required Yuba thickness.
It is usually about several mm to several cm.

The heat treatment is preferably maintained at a temperature of about 80 to 90°C for 10 to 15 minutes.

Furthermore, by forming a coagulated thin film on a highly heat-shrinkable film and lowering the tension of the film before the thin film hardens, wrinkles can be formed in the coagulated thin film and an appearance similar to that of classic yuba can be obtained. It is possible.

Furthermore, the present inventors have discovered that after a solidified thin film is formed on a film, by spraying water vapor or fine water droplets onto the solidified thin film, the solidified thin film can be peeled off from the film extremely easily.

At this time, the solidified thin film itself does not liquefy due to moisture absorption.

Next, the solidified thin film forming section 32 of the apparatus according to this embodiment will be explained in detail based on FIG.

In the figure, a concave portion 50 is formed on the upper surface of the lower mold 50.
A is provided. The lower part of the lower mold 50 is immersed in hot water 40 maintained at 80 to 90°C,
An air supply pipe 54 for delivering clean air for film separation and an exhaust pipe 56 for discharging air from the recess 50a are provided at the bottom of the recess 50a.

An upper mold 60 is fitted into the concave portion 50a of the lower mold 50 via a film 38 made of polyvinylidene chloride, and a cutter 62 is disposed in a sealed manner on the inner wall 60a of the upper mold 60.

Inside the frame 64 formed by the inner wall 60a of the upper mold and the film 38 disposed on the concave portion 50a of the lower mold, there is a soy milk feed pipe 66 for feeding soy milk to the frame 64, and a steam pipe for spouting steam. A pipe 68 is arranged.

The solidified thin film forming section 32 according to the illustrated example is constructed as described above, and its operation will be explained next with reference to FIGS. 2 to 6.

First, as shown in FIG. 2, the upper mold 60 is fitted into the concave portion 50a of the lower mold 50 with the film 38 interposed therebetween. Here, the film 38 and the concave portion 50
The air present between the film 38 and the film 38 is exhausted through the exhaust pipe 56, and the film 38 can be brought into close contact with the concave portion 50a.

Furthermore, since polyvinylidene chloride is used as the film 38, the film 38 is brought into close contact with the concave portion 50a due to the heat shrinkability of the film.

Then, soy milk is fed into the frame 64 from the soy milk feed pipe 66.
The soymilk 12 is heated through the lower mold 50 with hot water 40.

When this state is maintained for about 15 minutes, the soymilk 12 coagulates and forms a coagulated thin film 18.

Here, since the soymilk 12 is in contact with air, it is extremely easy to form a coagulated thin film.

However, the solidified thin film 18 is in close contact with the inner wall 60a of the upper mold 60.

After the solidified thin film is formed, steam is jetted from the steam pipe 68 to the position where the upper die inner wall 60a and the solidified thin film 18 are in close contact with each other, as shown in FIG.

As a result, the adhesive force between the solidified thin film 18 and the upper die inner wall 60a is significantly reduced.

Next, as shown in FIG. 4, the cutter 62 is lowered to separate the solidified thin film 18 from the inner wall 60a of the upper mold.

Note that care must be taken here so that the cutter 62 does not cut the film 38 when the cutter 62 descends.

Next, as shown in FIG. 5, the upper mold 60 rises and separates from the lower mold 50.

At this time, the cutter 62 is maintained in the lowered state, and even if the adhesive portion between the solidified thin film 18 and the upper mold inner wall 60a remains in the state shown in FIG. 4, it will not be cut by the cutter 62. becomes.

Next, the cutter 62 also rises, but at this stage there is a possibility that the film 38 is in close contact with the lower die concave portion 50a. Therefore, as shown in FIG. 6, clean air is supplied from the air supply pipe 54 provided in the lower mold recess 50a, and the film 38 and the recess 50a are
Separation takes place.

As a result, the solidified thin film 18 is obtained while being placed on the film 38, and is further subjected to drying and the like to become bean curd skin.

In addition, in the above process, by relaxing the film 38 before the solidified thin film 18 is completely hardened, it is possible to form a product with wrinkles similar to the classic Yuba.

As explained above, according to the solidified thin film forming section of this embodiment, it is possible to produce homogeneous bean curd skin in a short time with a simple operation.

FIG. 7 shows a solidified thin film forming section according to another embodiment of the present invention, and portions corresponding to those in FIG. 2 are designated by the reference numeral 100 and will not be described further.

The characteristic feature of this embodiment is that the upper mold 160
The inner wall and the upper surface of the lower mold 150 are coated with a fluororesin, and the resin coating 170 coated on the upper mold 160 prevents the solidified thin film 18 from adhering to the inner wall of the upper mold, and prevents the upper surface of the lower mold from adhering. The resin coating 172 formed on the lower mold concave portion 150a and the film 138
Prevent close contact with.

Therefore, as shown in FIG. 8, if the upper mold 160 is raised after the soymilk 12 becomes a coagulated thin film 18, the coagulated thin film 18, the upper mold 160 and the film 1
38 and the lower mold concave portion 150b can be easily separated, making it unnecessary to use a cutter, a steam pipe, an air supply pipe, etc. as in the apparatus shown in FIG.

Here, as the resin for forming the resin coatings 170 and 172, in addition to the above-mentioned fluorine-based resin, carbon-based resin and the like are suitable.

According to the present invention, soy milk is supplied in a thin layer on the film and heated to form a solidified thin film one by one, so other auxiliary materials such as sesame or nori may be added, special seasonings, etc. is possible.

Furthermore, the shape of the inner wall of the upper mold makes it possible to produce yuba in various shapes, thereby making it possible to further expand the use of yuba.

That is, in recent years, yuba has been expected to be used not only as an additive for boiled foods as in the past, but also as various food processing materials or edible coatings.
For this reason, there is a wide demand for accurate and uniform shape forming, and the present invention appropriately meets this demand.

[Effects of the Invention] As explained above, according to the present invention, a plurality of elongated coagulated thin film forming portions are formed in which soybean milk is injected into a thin layer onto a film and then heat-treated to form a coagulated thin film one by one. Since they are aligned on a film and the long film is moved in steps, homogeneous bean curd skin can be easily and continuously produced in a short period of time.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a continuous production apparatus for yuba according to an embodiment of the present invention, FIGS. 2 to 6 are explanatory diagrams of a solidified thin film forming part used in the production apparatus according to FIG. 1,
7 and 8 are explanatory views of a solidified thin film forming section used in an apparatus for producing bean curd according to another embodiment of the present invention, and FIG. 9 is an explanatory view of a conventional apparatus for producing bean curd. 12... Soy milk, 18... Solidified thin film, 32, 13
2... Solidified thin film forming section, 36... Winding roller (film moving section), 38, 138... Long film.

Claims (1)

[Scope of Claims] 1. A plurality of coagulated thin film forming units arranged along a long film, injecting soybean milk in a thin layer onto the film, and then heat-treating the film to form a coagulated thin film; and on the film. 1. A continuous production device for bean curd, characterized by comprising: a film moving section that moves the long film stepwise in the longitudinal direction after a solidified thin film is formed on the film. 2. In the apparatus according to claim 1, the thin film forming section includes: a lower mold having a concave portion of a predetermined shape on its upper surface; a cylindrical upper mold that fits into the concave portion with a film interposed therebetween; A cutter that is in close contact with the inner wall of the upper mold and is movable up and down, and is characterized by being formed so that soy milk is injected in a thin layer into the frame formed by the inner wall of the upper mold and the film and then heated. Continuous production equipment for yuba. 3. An apparatus for continuously producing bean curd skin according to claim 2, characterized in that a soybean milk feeding pipe and a steam pipe are provided on the frame. 4. An apparatus for continuously producing bean curd skin according to claim 2 or 3, characterized in that the concave portion of the lower mold is provided with an air supply pipe and an exhaust pipe. 5. In the device according to claims 2 to 4,
A yuba production device characterized in that the film is formed from polyvinylidene chloride. 6. In the apparatus according to claim 1, the solidified thin film forming section includes: a lower mold having a concave portion of a predetermined shape on its upper surface; and a lower die that is fitted into the concave portion via a film, and a resin coating is formed on the inner wall. 1. A continuous production apparatus for bean curd, characterized by comprising: a cylindrical upper mold, and a thin layer of soybean milk is injected into a frame formed by the inner wall of the upper mold and a film, and heat-treated. 7. The continuous production device for bean curd skin according to claim 6, characterized in that a soybean milk feeding pipe is provided on the frame. 8. An apparatus for continuously producing bean curd skin according to claim 6 or 7, characterized in that a resin coating is also formed on the concave portion of the lower mold. 9. The device according to claims 6 to 8,
This is a continuous production device for bean curd skin, characterized by the resin coating being made of fluorine-based resin. 10. An apparatus for continuously producing bean curd skin according to claims 6 to 8, wherein the resin coating is made of carbon-based resin.