JPH0259713B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an apparatus for continuously producing bean curd, particularly to an improvement in a soybean milk coagulation thin film drying mechanism.

[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. 10, 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 an appropriate adhesion 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.

Also, for example, JP-A-54-80448 or JP-A-Sho.
No. 55-50872 discloses an apparatus for drying the coagulated thin film collected as described above.

These drying devices all dry a coagulated thin film pulled up by hot air.

[Problems to be Solved by the Invention] Problems of the Prior Art However, in this method of producing yuba, there was a problem in that the coagulation thin film drying section became large.

That is, when the coagulated thin film of soymilk is heated and dried at high temperatures, there is a risk that the quality of the coagulated thin film may deteriorate.

Therefore, it is necessary to gradually dry the coagulated thin film over a long period of time.
50872, a method was adopted in which a cover was provided over a long-distance belt conveyor and hot air was sent into the cover.

However, the long distance belt conveyor and cover increase the size of the coagulation thin film drying section.

Of course, as shown in JP-A-54-80448,
Although it is possible to provide a heating dryer only on a small portion of the conveyor, in this case, the drying conditions become extreme and the quality of the produced bean curds deteriorates.

Furthermore, when one side of the coagulated thin film is attached to the film, as in the yuba production apparatus shown in FIG. However, on the other hand, moisture evaporation does not occur from the surface to which the film is attached. For this reason, drying with hot air as described above causes significant moisture unevenness on the front and back sides of the coagulated thin film, increasing the possibility of deterioration of the quality of the bean curd, such as cracking.

OBJECT OF THE INVENTION The present invention was made in view of the problems of the prior art, and its purpose is to provide a miniaturized yuba production device that can easily collect a coagulated thin film and also dry efficiently. Our goal is to provide the following.

[Means for Solving the Problems] In order to achieve the above object, the yuba manufacturing apparatus according to the present invention includes a coagulated thin film forming section that forms a coagulated thin film of soybean milk on one side of a film, and a coagulated thin film of the film. The method is characterized by comprising a coagulating thin film drying section in which a moisture absorbing material is placed on the forming surface.

[Function] Since the apparatus for producing yuba according to the present invention has the above-described means, a thin coagulated film of soybean milk is adhered and formed on one surface of the film by the coagulated thin film forming section, making it extremely easy to collect the yuba.

Then, in the solidified thin film drying section, a moisture absorbing material is placed on the surface of the film on which the solidified thin film is formed, and aging is performed for a predetermined period of time.

Therefore, the solidified thin film is dried under extremely mild conditions, and no deterioration in quality occurs.

Moreover, the coagulated thin film drying section does not require a long-distance belt conveyor or the like as in conventional equipment, and the film can be aged by winding it up on rollers or stacking it, for example, with the moisture absorbing material placed on the coagulated thin film forming surface of the film. If possible, it becomes possible to downsize the device.

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

Outline of Yuba Production Apparatus FIG. 1 shows a continuous Yuba production apparatus according to an embodiment of the present invention, and FIG. 1A is a top view thereof, and FIG. 1B is a side sectional view thereof.

The apparatus according to this embodiment has three solidified thin film forming parts 52a, 52b, 52 arranged in a row in a heating tank 50.
c, and a long film 56 fed out from the film roller 54.

Hot water 58 is retained in the heating tank 50, and the hot water 58 is heated by a steam heating pipe 60 and is always set at 80 to 90°C.

Further, the long film 56 is attached to the guide roller 6
2a, 62b, and 62c to a predetermined position, and a tension roller 64 applies a predetermined tension.

A characteristic feature of the present invention is that a coagulating thin film drying section 66 is provided for disposing a moisture absorbing material on the coagulating thin film forming surface of the film. In this embodiment, the coagulating thin film drying section 66 It consists of a take-up roller 68 that takes up the cloth and a cloth roller 72 that sends out the cloth 70.

The other end of the long film 56 is locked to a take-up roller 68, and the cloth roller 7
The cloth 70 fed out from the film 56 is coated on the surface of the film 56 and taken up by a take-up roller 68.

Here, the cloth 70 wound and held around the cloth roller 72 is made of cotton, has been sterilized and dried, and has a temperature adjusted to 30 to 50°C.

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 56 fed out from the film roller 54 by solidified thin film forming sections 52a, 52b, and 52c as described later.
is formed.

Once the solidified thin film 18 is formed, the take-up roller 68
is rotationally driven by a drive motor (not shown) and winds up the film 56.

At this time, the amount of film to be wound per time is
The area length corresponds to that of b and 52c.

Then, the solidified thin film 18 on the long film 56
is covered with the cloth 70 sent out from the cloth roller 72 when being wound up on the take-up roller 68 .

The coagulated thin film 18 collected in the above manner, together with the film 56 and the cloth 70, is collected by the winding roller 68.
A predetermined aging process is performed while the film is wound up.

During this aging, the moisture in the coagulated thin film 18 is absorbed by the cloth 70, and after the aging is completed, the moisture in the solidified thin film 18 is absorbed by the cloth 70.
A long film 56 and cloth 70 as shown in the figure.
peeled off from.

That is, the long film 56 and the cloth 70 wound up by the take-up roller 68 are taken up by the film collection roller 74 and the cloth collection roller 76, respectively.

Here, the film collection roller 74 is provided with a torque tender and a drive motor (not shown), and the cloth collection roller 76 is also provided with a drive motor.

Moisture adjustment is performed during aging, and the solidified thin film 1
The yuba 78 is peeled off from the film 56 and cloth 70 by drying and can be easily collected.

As explained above, according to the apparatus for producing yuba according to this embodiment, the yuba is dried under mild conditions, so its quality is improved, and the apparatus itself does not require a long-distance belt conveyor. Therefore, miniaturization can be achieved.

Structure of the solidified thin film forming section By the way, according to the yuba manufacturing apparatus as shown in the above-mentioned Japanese Patent Application Laid-Open No. 51-22844,
Compared to 80448 or JP-A-55-50872, it has the advantage that the coagulated thin film can be pulled up easily and the tofu skin does not tear. However, on the other hand, the time required for the coagulated thin film to form on the soy milk liquid surface There was a problem with it being too long.

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 solidified film will be formed. It will take several times more time to do so.

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 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.

Therefore, the present inventors used a mechanism in which soy milk is injected in a thin layer onto a film and then heat-treated to form bean curd skin as the solidified thin film forming section of the yuba manufacturing apparatus according to the present embodiment. .

Here, a vinylidene chloride resin coating is suitable as the film.

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 will not change again due to moisture absorption.

Next, the solidified thin film forming section 52 of the apparatus according to this embodiment will be explained in detail based on FIG.

In the figure, a concave portion 1 is provided on the upper surface of the lower mold 100.
00a is provided. The lower mold 100 is 80-90
The lower part thereof is immersed in hot water 58 maintained at a temperature of 0.degree. is provided.

The upper mold 1 is inserted into the concave portion 100a of the lower mold 100 through a film 56 made of polyvinylidene chloride.
06 is fitted, and the cutter 108 is disposed in close contact with the inner wall 106a of the upper die 106.

A frame 1 formed from the inner wall 106a of the upper mold and a film 56 disposed on the concave portion 100a of the lower mold.
10 includes a soy milk feed pipe 112 for feeding soy milk to the frame 110 and a steam pipe 1 for injecting steam.
14 are arranged.

The solidified thin film forming section 52 according to the illustrated example is constructed as described above, and its operation will be explained next with reference to FIGS. 3 to 7.

First, as shown in FIG.
are fitted and arranged. Here, the air interposed between the film 56 and the concave portion 100a is removed from the exhaust pipe 1.
04, and the film 56 is evacuated through the concave portion 1.
It can be closely attached to 00a.

Furthermore, since polyvinylidene chloride is used as the film 56, the film 56 comes into close contact with the concave portion 100a due to the heat shrinkability of the film.

Then, the soymilk is delivered to the frame 1 from the soymilk feed pipe 112.
The soybean milk 12 is poured into the mold 10 and heated with hot water 58 through the lower mold 100.

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 106a of the upper mold 106.

Then, after the solidified thin film is formed, as shown in FIG.
Steam is ejected to the position where the solidified thin film 18 and the solidified thin film 18 are in close contact with each other.

As a result, the adhesive force between the solidified thin film 18 and the upper die inner wall 106a is significantly reduced.

Next, as shown in FIG. 5, the cutter 108 is lowered to separate the solidified thin film 18 from the inner wall 106a.

Note that care must be taken here so that the cutter 108 does not cut the film 56 when the cutter 108 descends.

Next, as shown in FIG. 6, the upper mold 106 rises and separates from the lower mold 100.

At this time, the cutter 108 is maintained in the lowered state, and even if the adhesive portion between the solidified thin film 18 and the upper die inner wall 106a remains in the state shown in FIG. 5, it will not be cut by the cutter 108. becomes.

Next, the cutter 108 also rises, but at this stage there is a possibility that the film 56 is in close contact with the lower die concave portion 100a. For this reason, as shown in FIG.
Clean air is supplied from 2, and the film 56 and the recessed portion 100a are separated.

As a result, the solidified thin film 18 is obtained while being placed on the film 56, and is further subjected to drying and the like to become bean curd skin.

In addition, in the above process, by relaxing the film 56 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. 8 shows a solidified thin film forming section according to another embodiment of the present invention, and portions corresponding to those in FIG. 3 are designated by the reference numeral 100 and will not be described.

The characteristic feature of this embodiment is that the upper die 206
The inner wall and the upper surface of the lower mold 200 are coated with a fluororesin, and the resin coating 220 coated on the upper mold 206 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 222 formed on the lower mold concave portion 200a and the film 256
Prevent close contact with.

Therefore, as shown in FIG. 9, if the upper mold 206 is raised after the soymilk 12 has become a coagulated thin film 18, the coagulated thin film 18, the upper mold 206, and the film 2
56 and the lower mold concave portion 200a 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 220 and 222, 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 the form of a thin film onto the film and is heated to form a solidified thin film one by one. Therefore, it is not necessary to add other auxiliary materials such as sesame or seaweed, 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 coagulated thin film of soybean milk is formed on a film and a moisture absorbing material is placed on the coagulated thin film, so that the quality of bean curd is improved and production is improved. It is also possible to downsize the device.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a continuous production device for yuba according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of a yuba collecting device, and FIGS. 3 to 7 are diagrams used in the production device according to FIG. FIGS. 8 and 9 are explanatory diagrams of a coagulated thin film forming section used in a yuba manufacturing apparatus according to another embodiment of the present invention, and FIG. 10 is an explanatory diagram of a conventional yuba manufacturing apparatus. It is an explanatory diagram. 12... Soy milk, 18... Coagulated thin film, 52, 15
2... Solidified thin film forming section, 56... Long film,
66...Coagulation thin film drying section, 70... Cloth (hygroscopic material).

Claims (1)

[Scope of Claims] 1. A coagulated thin film forming section that forms a coagulated thin film of soymilk on one surface of the film, and a coagulated thin film drying section that arranges a moisture absorbent material on the coagulated thin film forming surface of the film. Yuba production equipment. 2. The apparatus for producing bean curd skin according to claim 1, wherein the moisture absorbing material is made of cloth. 3. The apparatus for producing bean curd skin according to claim 2, wherein the moisture absorbing material is made of cotton. 4. In the device according to claims 1 to 3,
The solidified thin film forming section includes a lower mold having a recessed part of a predetermined shape on the upper surface, a cylindrical upper mold that fits into the recessed part via a film, and a cylindrical upper mold that is in close contact with the inner wall of the cylindrical upper mold and moves vertically. What is claimed is: 1. An apparatus for producing bean curd, characterized in that it is formed to inject soy milk in a thin layer into a frame formed by an inner wall of an upper mold and a film, and heat-process the same. 5. The apparatus for producing bean curd skin according to claim 4, characterized in that a soybean milk feeding pipe and a steam pipe are provided on the frame. 6. The apparatus for producing bean curd skin according to claim 4 or 5, characterized in that the concave portion of the lower mold is provided with an air supply pipe and an exhaust pipe. 7. In the device according to claims 4 to 6,
A yuba production device characterized in that the film is formed from polyvinylidene chloride. 8. In the device according to claims 1 to 3,
The solidified thin film forming section includes: a lower mold having a concave portion having a predetermined shape on its upper surface; and a cylindrical upper mold that fits into the concave portion via a film and has a resin coating formed on its inner wall; A yuba production device characterized by injecting soy milk in a thin layer into a frame formed by an inner wall of an upper mold and a film, and heat-treating the same. 9. The yuba manufacturing apparatus according to claim 8, characterized in that a soybean milk feeding pipe is provided on the frame. 10. The apparatus for producing bean curd skin according to claim 8 or 9, characterized in that a resin coating is also formed on the concave portion of the lower mold. 11. The apparatus for producing bean curd skin according to claims 8 to 10, wherein the resin coating is made of a fluorine-based resin. 12. The apparatus for producing bean curd skin according to claims 8 to 10, wherein the resin coating is made of carbon-based resin. 13 In the apparatus according to claims 1 to 12, a plurality of coagulated thin film forming units are arranged in alignment along the long film, and after the coagulated thin film is formed on the film, the long film is stepped in the longitudinal direction of the long film. A tofu manufacturing device characterized by moving to.