JPH10234327A - Expressing machine for tofu production, go liquid expressing device and method for separating soybean milk in tofu production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an expressing machine for tofu production, 'go' (mashed soybeans including water) liquid expressing device and method for separating soybean milk in tofu production with which a state inside the jacket of expressing device can be easily watched so as to facilitate monitoring and timing for cleaning can be easily caught. SOLUTION: This 'go' liquid expressing device is provided with a 'go' liquid supplying device, expressing machine 3 and solid/liquid separator. The upper part of liquid storage jacket on the expressing machine 3 is opened. Am expressing screen 36 is provided inside the liquid storage jacket 33, and a screw 37 is arranged inside the expressing screen 36. A derivation pipe 336 is provided on the bottom of liquid storage jacket 33. A liquid feeding pipe connected to the derivation pipe 33 is provided with a check valve for keeping the level of soy-milk in the liquid storage jacket 33 almost constant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press for producing tofu, a press for squeezing liquid, and a method for separating soymilk in tofu production. More specifically, in a screw press type pressing machine for obtaining soy milk and okara by pressing boiled gou liquor, in a gou liquor pressing device, a pressing machine capable of easily performing maintenance and inspection for maintaining the pressing performance of the device, The present invention relates to a liquid pressing device and a method for separating soy milk in tofu production.

[0002]

2. Description of the Related Art In the production of tofu, there is a step of compressing boiled gou liquor to separate it into soymilk and soybean meal (okara). In this step, mechanization is progressing, and there is a screw press type pressing device as a typical device. A general example of the squeezing device is known from Japanese Patent Application Laid-Open No. 8-275749, and FIG. 9 shows the structure of a main part thereof. The squeezing device described in the above publication has a cylindrical squeezing screen 91 formed of a perforated plate and having a slightly tapered tip inside a cylindrical jacket 90, and a screw 92 inside the squeezing device.
Is provided to pass through. An outlet 93 is provided at an upper portion of the jacket 90, and a lower side of the jacket 90 is closed.

[0003]

By the way, in a general screw press type squeezing device, it is necessary to clean the squeezed screen and the screw inside the jacket in order to prevent a decrease in squeezing performance. However, the soybean debris and the midine clogged in the pressing screen inside the jacket cannot be easily removed because they are pressed into the mesh under high pressure, and are difficult to wash. For this reason, there is a problem that washing is not sufficiently performed, and chronic compression performance is likely to be reduced. In addition, high precision is required for clearance adjustment when assembling the screw and the pressing screen,
When a worker who does not have sufficient skills performs disassembly and adjustment, there is a problem that the performance is significantly reduced.

[0004] In view of the above, it is desirable that the pressing device be cleaned before the clogging progresses so much.
In order to determine the timing of the cleaning, it is necessary to visually monitor the clogging of the pressing screen inside the jacket. However, the conventional pressing device described in the above publication,
Since the outlet pipe is provided at the top of the jacket, the jacket cannot be opened, and it is difficult to monitor the state of the inside of the jacket.

[0005] Further, since the operation of cleaning the inside of the jacket has a large risk as described above, it is desirable to maintain the squeezing performance for as long as possible and reduce the number of times of cleaning.
However, in the conventional squeezing device described in the above publication, since the piping of the outlet is provided at the top of the jacket, the midine contained in the soymilk tends to collect at the bottom of the jacket. For this reason, clogging is likely to be promoted by the midin returning to the inside of the squeeze screen, and frequent cleaning has to be performed.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and provides a press machine for tofu production which makes it easy to monitor the condition of the inside of a jacket of a press device and facilitates the timing of washing. It is an object of the present invention to provide a kure squeezing apparatus and a method for separating soy milk in tofu production.
In addition, in order to prevent the accumulation of midines at the bottom of the jacket, the clogging of the pressing screen is reduced, and the number of times of washing can be reduced. An object of the present invention is to provide a method for separating soymilk.

[0007]

Means of the present invention taken to achieve the above object are as follows. According to the first invention, there is provided a pressing machine for producing tofu, wherein a liquid storage tank body having an open upper portion, a pressing cylinder disposed inside the liquid storage tank body, and the pressing cylinder Inside the body, a screw disposed so that the rotation trajectory of the outer edge of the spiral blade is substantially along the inner surface of the compression cylinder, and the bottom of the liquid storage tank body or A press for producing tofu, characterized in that a lead-out part for drawing out soy milk is provided near the bottom.

According to a second aspect of the present invention, there is provided a tofu production method according to the first aspect, further comprising a liquid level maintaining means for maintaining a state in which the compressed cylinder is immersed in soy milk. It is a pressing machine.

According to a third aspect of the present invention, there is provided a squeezing liquid pressing device, comprising the pressing machine according to the first or second invention, and a squeezing liquid feeding means for supplying the squeezing liquid to the pressing machine. And a solid-liquid separation unit for performing solid-liquid separation of soymilk containing midine derived from the pressing machine.

According to a fourth aspect of the present invention, there is provided a method for separating soy milk in the production of tofu, wherein a screw press type press equipped with a liquid storage tank is used, and the bottom of the liquid storage tank or the vicinity of the bottom is used. Deriving soymilk containing a midine from, characterized in that to obtain soymilk by solid-liquid separation of the soymilk containing the midine,
This is a method for separating soy milk in tofu production.

(Operation) The gou juice is supplied to the inside of the pressing machine by the gou juice feeding means. The kure liquid is sent to the constricted tip side of the compression cylinder by the rotation of the screw and is compressed. Kure juice is divided into soy milk and soybean meal by pressing.
The soy milk is blown out through the squeezed cylinder, and is temporarily stored. The soybean meal remaining inside the squeezed cylinder is discharged sequentially from the tip.

[0012] The soymilk stored in the liquid storage tank includes a soybean meal called so-called midine. The midin gradually accumulates at the bottom of the liquid storage tank body and is drawn out to the outside as the soymilk is drawn out from the drawing-out part. The soymilk containing the derived mididine is subjected to solid-liquid separation by solid-liquid separation means,
A soymilk containing no midines is obtained. It should be noted that, by being extracted from the inside of the storage tank body together with the soymilk, the amount of the midine contained in the soymilk stored in the storage tank body is reduced, and the midine returns to the inside of the compressed cylinder to promote clogging. Can be reduced.

Further, since the upper portion of the liquid storage tank body is open, the lid is opened when necessary, for example, so that the state inside the liquid storage tank body can be improved.
In particular, the degree of clogging of the compression cylinder can be monitored. Therefore, cleaning can be performed at a timing at which clogging does not proceed excessively, and chronic clogging can be prevented.

In the case where the pressing machine is provided with a liquid level maintaining means for maintaining a state where the pressing cylinder is immersed in the soymilk, the portion pressed by the pressing cylinder and the screw is always immersed in the soymilk. It will be in the state that was done. Therefore, when squeezed, soy milk that is blown out through the squeezed cylinder body is blown out into the soy milk liquid, and bubbles are generated unlike the case where the soy milk is blown out and scattered toward the wall surface in the space. Can be prevented. Thereby, soy milk containing little air bubbles is obtained, and the quality of products such as tofu is improved.

[0015]

Embodiments of the present invention will be described in more detail with reference to the drawings. FIG. 1 is a front view showing an embodiment of a kure squeezing device according to the present invention, FIG. 2 is a side view of the kure squeezing device shown in FIG. 1, and FIG. 4 is a sectional view showing the structure of the press, FIG. 5 is a plan view of the press, and FIG. 6 is a sectional view showing the structure of the check valve.

Reference numeral A denotes a kure squeezing device, and a frame 1 and
It comprises a kure liquor feeding device 2 provided on the lower side of the frame 1, a pressing machine 3 provided on the upper side of the frame 1, and a solid-liquid separator 4 provided side by side with the pressing machine 3. At the lower four corners of the frame 1 formed of an angle material, height-adjustable leg members 10 are provided.

The kure liquid supply device 2 has a tank 20. One end of a liquid sending pipe 21 is connected to the bottom of the tank 20, and the other end is connected to the suction side of the pump P1. One end of a liquid feed pipe 22 is connected to the discharge side of the pump P1, and the other end is introduced into a sub-tank 23 described later. A lid 24 is placed on the upper opening of the tank 20. An opening 240 (shown in FIG. 2) is provided in a part of the lid 24 so as to correspond to a chute 44b of the solid-liquid separator 4 described later.

On the upper side of the tank 20, there are provided two introduction pipes 25 for introducing the soybean soup. One of the introduction pipes 25 has a liquid supply pipe 29 for supplying the boiled gou liquor.
(Shown in FIG. 7 described later). One end of a liquid feed pipe 28 is connected to the other inlet pipe 25. The other end of the liquid feed pipe 28 is connected to an overflow discharge pipe 230 provided on the upper part of the sub tank 23.
The tank 20 is provided with a liquid level sensor 26 (shown in FIG. 7) for detecting the full tank level and the empty tank level of the soybean soup.

The structure of the pressing machine 3 will be described with reference to FIGS. The squeezing machine 3 is disposed on the upper front side of the frame 1. The pressing machine 3 is fixed to the frame 1,
The bearing jacket 30 has a horizontal axial direction. A bearing 31 is detachably and watertightly attached to an outer end of the bearing jacket 30. On the upper part of the bearing jacket 30, there is provided a soybean liquid introducing pipe 32 penetrating the side wall part. The sub-tank 23 is attached to the kure liquid introducing pipe 32. A circular mounting flange 300 is provided at the inner end of the bearing jacket 30.

Mounting flange 300 of bearing jacket 30
Is connected to a liquid storage jacket 33 which is a liquid storage tank body by attaching one mounting flange 330. The liquid storage jacket 33 has a semicircular cross section on the lower side, a rectangular opening 331 on the upper side, and openings 332 and 333 at the center on both lower ends. The structure has attachment flanges 330 and 334. A removable lid 335 covers the opening 331 at the upper part of the liquid storage jacket 33. In addition, at the bottom of the liquid storage jacket 33 on the side of a discharge unit 34 described later, a lead-out pipe 336 that leads out soymilk containing a mididine is provided. Outlet pipe 33
6, one end of a liquid sending pipe 337 is connected, and the other end is introduced into a separation drum 42 of a solid-liquid separator 4 described later.

A check valve 39 serving as a liquid level maintaining means is provided at an intermediate portion of the liquid sending pipe 337. Check valve 39 has a valve jacket 390. A valve port 390a is provided inside the valve jacket 390. Connecting portions 391 and 392 are provided on both sides in the lateral direction of the valve jacket 390. Connecting parts 391, 39
A liquid feed pipe 337 is connected to 2. A drain screw 390b is screwed to the bottom of the valve jacket 390.

At the upper part of the valve jacket 390, an attachment port 393 is provided. The guide tube 39 is provided at the attachment port 393.
4 is attached watertight. At the top of the guide tube 394,
A cap 395 having an insertion hole 396 at the center is screwed. In the guide tube 394, a lifting rod 397 is provided.
Is slidably fitted. A plug 398 is attached to the lower end of the lifting rod 397. In addition, a knob rod 399 that is inserted into the insertion hole 396 is provided above the lifting rod 397.

In the normal state, the lifting rod 397 is lowered by its own weight, and the plug 398 closes the valve port 390a. In FIG. 6, when a liquid pressure of soymilk having a predetermined strength is applied from the direction of arrow a, the stopper 398 and the lifting rod 397 are raised, the valve port 390a is opened, and the soymilk flows in the direction of arrow b. In addition,
Elevating rod 397 including knob rod 399 and plug 3
The weight of 98 is set such that the valve port 390a is opened when a required amount of soymilk (the amount by which the whole of the pressing screen 36 described later is dipped) accumulates in the liquid storage jacket 33.

A discharge device 34 for forming a discharge portion of soybean meal is attached to the attachment flange 334 by attaching the attachment flange 340 thereto. At the center of the mounting flange 340,
A bearing 35 is mounted. The bearing 35 is provided with a discharge port 350 provided on the outer peripheral side so that soybean meal can be discharged.

The ejector 34 has a base 341 having a U-shape in plan view. The operating rod 342 is attached to the base 341 so that the operating rod 342 can advance and retreat by turning the handle 343. At the inner tip of the operating rod 342,
A plug 344 that can close or open the outlet 350 is attached. The plug 344 is connected to the spring 34.
5 is pressed against the discharge port 350.

The opening 332 of the liquid storage jacket 33,
Between 333, a pressing screen 36, which is a pressing cylinder, is attached. The pressing screen 36 is a stainless steel plate having a large number of very small holes formed over almost the entire surface, and is formed in a cylindrical shape gradually narrowing toward the opening 333 side. The diameter of the hole can be set as appropriate. A bearing 31 on the bearing jacket 30 side and a bearing 35 on the ejector 34 side
A screw 37 is rotatably and water-tightly accommodated in the press screen 36 between them. The screw 37 has a spiral blade 371 attached to the rod 370.
, And the rotation trajectory of the outer edge of the spiral blade 371 is disposed so as to substantially contact the inner surface of the pressing screen 36.

A sprocket 372 is attached to the outer end of the rod 370 of the screw 37. The sprocket 372 has a motor M housed in the casing 38.
A chain 373 (illustrated in FIG. 7) driven by the motor 2 is wound.

The solid-liquid separator 4 separates solid and liquid soymilk containing mididine, which is supplied from the pressing machine 3, to obtain soymilk containing no mididine. The solid-liquid separator 4 is accommodated and arranged inside a casing 40 having a lid 41 that can be opened and closed. Here, FIG. 7 described later is referred to.
The solid-liquid separator 4 includes a separation drum 42 driven by a motor M1. The separation drum 42 is provided with a fine mesh (e.g.,
(It is a mesh, but not limited to it.) The wire mesh is formed in a substantially cylindrical shape. An inner spiral blade 43 is attached to the inner peripheral surface of the separation drum 42 over substantially the entire length.

At the end of the separation drum 42 on the soymilk introduction side (the left side in FIG. 7), the end of the liquid feed pipe 337 is arranged as described above. Further, a receiver 44 is provided below the separation drum 42. In the receiver 44, a portion corresponding to the outer peripheral surface of the separation drum 42 is a soymilk receiving portion 44a, and a portion corresponding to an end on the side of discharging the midine (right side in FIG. 7) is a chute 44b. In addition, the bottom of the soymilk receiving part 44a is connected to a liquid feed pipe 45 for feeding soymilk containing no midine to the next step.

(Operation) FIG. 7 is a block diagram of the kure squeezing device, and FIG. 8 is a flowchart of the automatic operation of the kure squeezing device. With reference to FIGS. 1 to 8, the operation of the kure squeezing device according to the present invention will be described. When the boiled soybean juice is fed from the liquid sending pipe 29 to the tank 20 and the liquid level sensor 26 detects the full tank level, the pump P1 operates to send the soybean soup to the sub tank 23.
When the go soup enters the inside of the bearing jacket 30 from the sub-tank 23, the motor M2 operates slightly after the operation of the pump P1, and the screw 37 starts rotating. The overflow of the sub tank 23 is returned to the tank 20.

The kure liquid is sent to the constricted front side of the pressing screen 36 by the rotation of the screw 37 and pressed. As a result, the kure juice is divided into soymilk containing soybeans and soybean meal. The soymilk is blown out through the pressing screen 36 and stored in the liquid storage jacket 33. Midine contained in the stored soymilk gradually accumulates at the inner bottom of the liquid storage jacket 33. On the other hand, the soybean meal remaining inside the squeezing screen 36 pushes the plug 344 open by the pressure of the squeezing, and is sequentially discharged from the discharge port 350 at the tip end.

When the soymilk has collected to a predetermined liquid level at which the whole of the pressing screen 36 is immersed, the check valve 39 is opened by the liquid pressure, and the soymilk is fed to the solid-liquid separator 4. The check valve 39 repeats the operation of opening when the soymilk accumulates up to the predetermined liquid level and closing when the soymilk is supplied and the liquid level drops, so that the liquid level of the soymilk is kept substantially constant. In addition,
The soy milk blown out through the pressing screen 36 is blown out into the soy milk liquid, and unlike the case where the soy milk is blown out and scattered toward the wall surface in the space, the generation of bubbles can be prevented. Thereby, soy milk containing little air bubbles is obtained, and the quality of products such as tofu is improved.

[0033] The mididine that accumulates at the inner bottom of the liquid storage jacket 33 is discharged to the outside as the soymilk is discharged from the discharge pipe 336 by the liquid level control as described above. The soymilk containing the derived mididine is fed to the solid-liquid separator 4. The separation drum 42 of the solid-liquid separator 4 is driven and rotated by a motor M1. Midin is filtered by the separation drum 42,
Midine (slightly mixed with soy milk) is sent to the discharge side by the inner spiral blade 43 and returned to the tank 20 from the chute 44b of the receiver 44. In addition, the soymilk that does not contain a midine that passes through the separation drum 42 is sent from the soymilk receiving unit 44a to the next process.

When the liquid in the tank 20 is reduced and the liquid level sensor 26 detects the empty can level, the pump P1 is slightly delayed.
Stops operating, and the motor M2 stops operating a little later, and the screw 37 stops. When suspending the operation of the kure squeezing device A, the knob rod 399 of the check valve 39 is picked up, the check valve 39 is opened, and the soymilk stored in the liquid storage jacket 33 is fed to the solid-liquid separator 4. I do. The soymilk remaining inside the valve jacket 390 is removed by removing the drain screw 390b.

According to the kure liquid squeezing device A, since the mididine is extracted from the inside of the liquid storage jacket 33 together with the soy milk, the amount of the midine contained in the soy milk stored in the liquid storage jacket 33 is reduced. And promoting clogging can be reduced. Further, since the upper portion of the liquid storage jacket 33 is opened, the lid 335 can be opened when necessary to monitor the state inside the liquid storage jacket 33, particularly the degree of clogging of the pressing screen 36. Therefore, cleaning can be performed at a timing at which clogging does not proceed excessively, and chronic clogging can be prevented.

The terms and expressions used in the present specification are for explanation only, are not restrictive, and do not exclude the terms and expressions equivalent to the above-mentioned terms and expressions. In addition, the present invention is not limited to the illustrated embodiment. For example, a plurality of presses 3 may be arranged in parallel.
Various modifications are possible within the scope of the technical idea.

[0037]

The present invention has the above configuration and has the following effects. (A) The soymilk stored in the liquid storage tank body contains a small soybean meal, mididine, which gradually accumulates at the bottom of the liquid storage chamber, and is used to draw out the soymilk from the outlet. It is led out. The derived soybean milk containing the mididine is subjected to solid-liquid separation by the solid-liquid separation means, so that soymilk containing no midin can be obtained. In addition, since the midine is led out of the storage tank body together with the soymilk, the amount of the midine contained in the soymilk stored in the storage tank body is reduced, and the midine returns to the inside of the compressed cylinder to promote clogging. Can be reduced.
Therefore, the number of times of cleaning the inside of the liquid storage tank body having a large risk can be reduced as compared with the conventional one.

(B) Since the upper portion of the liquid storage tank body is open, the state of the liquid storage tank body by opening the lid when necessary,
In particular, the degree of clogging of the compression cylinder can be monitored. Therefore, cleaning can be performed at a timing at which clogging does not proceed excessively, and chronic clogging can be prevented.

(C) When the pressing machine is provided with a liquid level maintaining means for maintaining a state where the pressing cylinder is immersed in the soy milk, the portion pressed by the pressing cylinder and the screw is always soy milk. It will be immersed in. Therefore, the soymilk that is blown out through the squeezing cylinder is blown out into the soymilk liquid, and unlike the case where the soymilk is blown out and scattered toward the wall surface in the space, the generation of bubbles can be prevented. . As a result, soy milk containing little air bubbles is obtained,
The quality of products such as tofu also improves.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a kure squeezing device according to the present invention.

FIG. 2 is a side view of the kure squeezing device shown in FIG.

FIG. 3 is a plan view of the kure squeezing device shown in FIG.

FIG. 4 is a sectional view showing the structure of the pressing machine.

FIG. 5 is a plan view of the pressing machine.

FIG. 6 is a sectional view showing the structure of a check valve.

FIG. 7 is a block diagram of a kure squeezing device.

FIG. 8 is a flowchart of the automatic operation of the kure squeezing device.

FIG. 9 is a cross-sectional view showing a structure of a main part of a conventional pressing device.

[Explanation of symbols]

 Reference Signs List A Kure squeezing device 1 Frame 10 Leg member 2 Kure liquor supply device 20 Tank 21 Liquid supply pipe P1 Pump 22 Liquid supply pipe 23 Subtank 230 Discharge pipe 24 Cover 240 Opening 25 Inlet pipe 29 Liquid supply pipe 28 Liquid supply pipe 26 Liquid Position sensor 3 Compressor 30 Bearing jacket 300 Mounting flange 31 Bearing 32 Kure liquid introducing pipe 33 Liquid storage jacket 330, 334 Mounting flange 331 Opening 332, 333 Opening 335 Cover 336 Outgoing pipe 337 Liquid sending pipe 34 Discharger 340 Attachment flange 341 Base 342 Operation rod 343 Handle 344 Plug body 345 Spring 35 Bearing 350 Discharge port 36 Compressed screen 37 Screw 370 Rod 371 Spiral blade 372 Sprocket 373 Chain 38 Casing M2 Motor 39 Check valve 390 Valve Jacket 390a Valve port 390b Drain screw 391, 392 Connecting portion 393 Attachment port 394 Guide tube 395 Cap 396 Insertion hole 397 Elevating rod 398 Plug body 399 Knob rod 4 Solid-liquid separator 40 Casing 41 Cover 42 Separating drum 43 Inner spiral blade Container 44a Soybean milk receiving part 44b Chute 45 Liquid feeding tube M1 Motor

Claims (4)

[Claims] 1. A pressing machine for producing tofu, comprising: a storage tank body having an open upper part; a compression cylinder body disposed inside the storage tank body; A screw that is arranged so that the rotation trajectory of the outer edge of the spiral blade essentially follows the inner surface of the squeezing cylinder, at the bottom or near the bottom of the liquid storage tank, A squeezing machine for producing tofu, characterized in that it has an outlet for extracting soy milk. 2. The pressing machine for producing tofu according to claim 1, further comprising a liquid level maintaining means for maintaining a state in which the compressed cylinder is immersed in soy milk. 3. A squeezing liquid squeezing device, comprising: the squeezing machine according to claim 1 or 2; squeezing liquid feeding means for supplying the squeezing liquid to the squeezing machine; And a solid-liquid separation unit for performing solid-liquid separation of soy milk containing the soy milk. 4. A method for separating soy milk in tofu production, comprising using a screw press-type pressing machine equipped with a liquid storage tank to derive soy milk containing mididine from or near the bottom of the liquid storage tank. A method for separating soymilk in the production of tofu, comprising obtaining soymilk by solid-liquid separation of the soymilk containing the midine.