JP4172396B2 - Rice milling facility - Google Patents

Description

  The present invention relates to a rice milling apparatus for whitening brown rice and rice bran brought in by a user.

A conventional money-feeding type rice mill is configured such that brown rice and rice bran fed into the raw material supply hopper are collected into a white rice tank by white rice that has been milled through a stone remover, a rice mill, etc. A configuration is generally provided in which one facility is provided for each facility, and a stone removal process by a stone removal machine and a rice polishing process by a rice milling machine are sequentially performed and taken out into a white rice tank (Patent Document 1).
JP 2003-93901 A

The raw material supply hopper is provided with a lower limit sensor so that the presence or absence of grains in the hopper can be confirmed. If the lower limit sensor is not reached, each part of the apparatus is controlled to stop after a predetermined time.
However, some users may bring an end amount less than the lower limit sensor. Since the lower limit sensor at the time of charging is turned off, the output of each part of the apparatus cannot be output and the rice milling process cannot be performed.

  An object of the present invention is to be able to polish rice with a small amount of brown rice.

The invention described in claim 1 includes a raw material charging hopper (45) for charging brown rice, a stone punching machine (52) for removing stone from the brown rice charged in the raw material charging hopper (45), and stone removal by a stone cutting machine (52). In a rice milling facility provided with a rice milling machine (60) for processing the polished brown rice and a white rice tank (62) for discharging the polished white rice, a small amount of brown rice is separated from the raw material input hopper (45). A raw material charging port (46) to be charged, an openable / closable hopper (49) provided in the raw material charging port (46), and a confirmation sensor (50) for confirming opening / closing of the hopper (49) are provided, and the confirmation sensor When (50) detects the open state of the hopper (49), it is switched to the small-scale rice milling mode .

Furthermore, in the invention described in claim 2 , the raw material charging port (46) is provided at a position higher than the raw material charging hopper (45), and the raw material charging port (46) and the stone remover (52) communicate with each other. A rice milling facility according to claim 1, wherein:

The invention of claim 1 can polish rice even with a small amount of brown rice.
Further, it is possible to check the open state of the hopper (49) and perform the small-scale rice milling mode.
Moreover, the invention of claim 2 can supply brown rice directly to the stone remover (52) from the raw material inlet (46).

  The building is divided into a machine room and an operation room, and a plurality of raw material supply units are formed on the operation room side to shorten the waiting time for rice milling.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view of a building, which is divided into a machine room 1 and an operation room 2 by a partition wall 3, and among these, in the machine room 1, at a position close to the partition wall 3, a white rice tank is at the center. 4 and raw material supply hoppers 5a and 5b are arranged on the left and right sides. These white rice tanks 4 are provided with a shutter on the lower side, and the dropped white rice is configured to be collected in a bag or the like on the operation chamber 2 side. The raw material supply hoppers 5a and 5b communicate with the operation chamber 2 side so that the white rice can be taken out or supplied from the operation chamber 2 side.

  The raw material supply hoppers 5a and 5b are connected to stone lifting elevators 6a and 6b, respectively, so that unpolished rice as a raw material should be supplied to the stone lifting elevators 6a and 6b by rotation of an unillustrated feed valve. The elevators 6a and 6b are configured to be supplied to stone removers 7a and 7b disposed below the elevators 6a and 6b, respectively.

  The stone removers 7a and 7b have a publicly known configuration, and are formed by swinging a vent hole on an inclined board surface, receiving a sorting wind blown from below, rocking stone debris to the upper part of the inclination, and being discharged from the lower side of the inclination. It is configured to separate from brown rice.

Rice mill elevators 8a and 8b are erected in a symmetrical position near the stone removers 7a and 7b.
The raw material charging hoppers 5a and 5b and the stone removers 7a and 7b are arranged at symmetrical positions. Therefore, a space is formed between the white rice tank 4 and the rice mill elevators 8a and 8b at the central position in the machine room 1. In this position, a rice milling machine 9 is provided. The number of the rice milling machine 9 is one, and the configuration thereof is a known configuration including a brown rice hopper 10 at the top, a milling chamber equipped with a milling roll inside, and a pressing plate at the exit of the milling chamber.

The brown rice hopper 10 is configured to receive the brown rice supplied from the rice lifting machines 8a and 8b.
11a and 11b are operation panels provided in the same form (FIG. 2), and each includes a coin insertion slot 12, a mochi selection switch 13, and whiteness selection switches 14 to 16 (in the example shown, 8 minutes, standard and upper white are selected. And a brown rice loading ready lamp 17 for designating whether or not brown rice needs to be loaded. By inserting coins from the coin insertion slot 12, a built-in coin mech is linked and a predetermined operation time is selected with a predetermined amount. In addition, it is set as the structure by which the elastic force which repels the compression board of the rice milling machine 9 is set based on the selection setting of a whiteness selection switch, and a rice milling operation is performed by predetermined milling pressure. The symbol a relates to the operation panel 11a, and the symbol b similarly relates to the operation panel 11b.

  Next, linkage control between the operation panel 11a and the operation panel 11b will be described. The control unit 11c is common to the operation panels 11a and 11b, and the feeding valve motors 19a and 19b, the stone removing machine motors 20a and 20b, the rice milling machine motor 21, the stone removing machine motors 22a and 22b, the rice milling machine motors 23a, 23b is configured to be turned on and off at a predetermined timing by a detection signal from a sensor disposed on each part side, a timer signal, and the coin number detection signal.

  The control unit 11c determines the priority order by setting the work processing order of the operation panel 11a or the operation panel 11b as follows. That is, the raw material supply hoppers 5a and 5b are provided with lower limit sensors 25a and 25b, respectively. When raw brown rice is supplied to any of the hoppers 5a and 5b, it is configured to preferentially process the one in which the lower limit sensor is turned on first (under brown rice presence detection state) under the coin insertion condition. As a configuration for preferentially processing the set one (for example, the side of the symbol a), the work order is determined in advance.

  An example of lighting or extinguishing of the brown rice charging lamps 17a and 17b is as follows. When brown rice is supplied to either one of the raw material supply hoppers 5a or 5b (in this example, 5a) from the state where both brown rice can be put in (both are lit), the brown rice is not supplied to the corresponding hopper 5a. The throwable lamp 17a is turned off, and the brown rice throwable lamp 17b on the hopper b side is also turned off. This is because the lower limit sensors 25a and 25b are turned on when the brown rice is turned on, so that the starting conditions are set, and other people start unexpectedly, and the rice of different users is mixed into the rice mill 9 is prevented.

  The action by the user A and the user B in the rice milling facility configured as described above will be described. User A inserts a predetermined coin and supplies brown rice to the raw material supply hopper 5a. Next, any whiteness selection switch is selected and turned on. As a result, the feed valve motor 19a, the stone punching elevator motor 20a, the stone punching motor 21a, the rice milling motor 22a, and the rice milling motor 23a are driven and output, and the transporting parts and equipment start operation, and the input brown rice is subjected to the rice polishing process. , Discharged into the white rice tank 4.

  User B can put brown rice into the raw material supply hopper 5b when the brown rice charging ready lamp 17b is in a lit state even while the brown rice brought into User A is being polished. Even if the coin insertion and whiteness selection switch is operated at this time, the operation is prohibited, and the brown rice processing carried by the user B is carried out from the raw material supply hopper 5b until the stone removal elevator is completed until the processing of the brown rice brought by the user A is completed. Unable to move brown rice toward 6b. That is, the rice mill 9 constitutes a means for recognizing that the raw brown rice from the raw material supply hopper 5a is being processed, and when it is recognized that the raw rice in the raw material supply hopper 5b is rotating the feed valve. It is prohibited and brown rice cannot be supplied to the stone lifter 6b.

  When the rice milling process proceeds, the lower limit sensor 24a of the raw material supply hopper 5a is turned off, and the driving load of the milling roll of the rice milling machine 9 reaches a certain level or less, the control unit has finished processing the raw brown rice of the raw material supply hopper 5a. While the operation of the rice milling machine 9 is continued, the presence or absence of raw material brown rice is confirmed by the output of the lower limit sensor 24b in the raw material supply hopper 5b. 7b and the rice milling machine 9 that is continuously driven via the rice milling elevator 8b.

During this time, user A collects all the polished rice remaining from the white rice tank.
As described above, the user B can wait while supplying the raw material to the raw material supply tank 5b separately provided in the middle of processing the raw brown rice brought in by the user A, and injecting the set fee in advance. Thus, the user A can automatically continue the rice milling continuously. Therefore, in contrast to the conventional technology in which user B cannot supply brown rice until the previous user A finishes the white rice collection process, it can be done without being restricted by the preparation time for user B to introduce brown rice, etc. Thus, the recovery operation from the white rice tank of the user A is performed during the rice milling process of the brown rice brought in by the user B, and the waiting time of the subsequent user can be shortened.

FIG. 4 shows a different example.
Raw material supply hoppers 26a and 26b are disposed on the left and right of the stone lifter 25, and the supply port portions 27a and 27b are provided with opening and closing shutters 28a and 28b. The stone punching machine 29, the rice milling machine 30, the rice milling machine 31, and the white rice tank 32 below the stone lifting machine 25 have a single specification.

  The operation panel 33 has whiteness selection switches 35 to 37 and a glutinous button 38 in common, and the coin insertion slots 34a and 34b are separate. The brown rice charging ready lamps 39a and 39b are also provided respectively, and are arranged so as to correspond to the supply hoppers 26a and 26b, so that the lower limit sensor 40a of the raw material supply hopper on which brown rice is previously charged, for example, the hopper 26a is operated. When this is done, the processing of the raw material supply hopper 26a is preferentially performed, and the opening / closing shutter 28a is opened to perform the stone removal and rice milling processing.

  After the opening / closing shutter 28a is opened, raw brown rice can be supplied to the raw material supply hopper 26b. That is, while the open / close shutter 28b is closed and the open / close shutter 28a of the raw material supply hopper 26a is opened and the rice milling process is completed, the brown rice input ready lamp 39b is in a lighting state, that is, a state in which brown rice input is permitted. Yes.

  Accordingly, when it is determined that the process is terminated when the load current of the rice mill 31 decreases, the open / close shutter 28a closes, while the open / close shutter 28b opens the shutter on condition that the rice milling conditions are satisfied (for example, the insertion of money). be able to.

  In the operation panel shown in FIG. 2 and FIG. 5, the work procedure number and the operation content are written together. However, if the number portion is illuminated by energization, each processing content of a plurality of users is obvious. It is convenient.

By opening the opening / closing shutter 28b, the stone removing machine 29 and the rice milling machine 31 in continuous operation can perform the stone removing process and the rice polishing process, respectively.
When configured as shown in the figure, when user A and user B intend to use the same time zone, both raw material charging hoppers 26a and 26b are empty, and brown rice charging ready lamps 39a and 39b are both lit. The priority order is selected so that the processing from the user A side hopper 26a is prioritized by the user A putting it into the raw material charging hopper 26a.

  FIG. 6 will be described. The same reference numerals are used for members common to those in FIG. Charge tanks 40a and 40b are respectively arranged at the subsequent stage of the stone removers 7a and 7b, and the rice is lifted from the charge tanks 40a and 40b by the rice mill elevators 8a and 8b.

  With this configuration, the brown rice supplied to the raw material supply hopper 5b by the user B while the brown rice is put into the raw material supply hopper 5a and processed by the user B is not put on standby in the hopper 5b. The process goes up to the stone removal process and waits in the charge tank 40b. In this case, when the brown rice polished by the user A is finished, the brown rice that has been stone extracted by the user B is continuously polished. It can be processed. Therefore, the stone removal process can be performed during the last user's rice milling operation more than in the case of FIG.

  FIG. 7 is a time chart and shows a comparison with the processing steps in the case where a conventional rice milling facility having one rice mill is equipped with a single raw material supply hopper. For example, the symbol Ts in FIG. 7 indicates the time until the user enters the operation room and starts the operation of each part, and corresponds to, for example, the time when the brown rice is thrown in, the money is thrown in, or the instruction is read (for example, about 1 minute). Further, the symbol Te is the time from when each part stops operating until it leaves the operation room, and corresponds to the time for discharging from the white rice tank, closing the bag, carrying out, etc. (for example, about 1 minute). Rice milling time Tm is about 7-8 minutes at 30 kg.

  In the conventional configuration, while the full time of time Ts + Tm + Te is consumed for each user, the next user has to wait for this time (user B in time chart (1)). However, when configured as shown in FIG. 1 or FIG. 4, brown rice can be supplied to another raw material supply tank while the previous user is performing the rice polishing process, and the loss corresponding to the time Ts is eliminated. Yes (time chart (2)).

  Similarly, with the configuration shown in FIG. 6, the previous user can perform operations and operations related to the time Te during the next rice milling operation of the next user, and the loss corresponding to this time Te can be eliminated ( Time chart (3)).

  The rice milling facility equipped with the above-described raw material supply hopper and charge tank can be applied to a large-scale retail store to be used by shoppers, or to an outdoor drive-through rice milling facility. In such a form, waiting time is spent on shopping time by adding a configuration in which processed rice that has been milled and discharged into a white rice tank is automatically packed with a separately installed bagging machine and temporarily stocked. It can be useful.

  FIG. 8 shows a rice milling facility provided with a small amount of raw material input port 46 in addition to a normal raw material supply hopper 45. The raw material input port 46 is configured at a low position so as to be connected to the lower receiving port 47a of the stone lifting elevator 47. It is configured to communicate. For example, it is provided below the operation part of the operation panel 48. A hopper 49 is configured to be openable and closable at the raw material charging port 46, and can be thrown forward by a handle so as to be able to be charged, and is closed and switched to a storage posture that is flush with the operation panel surface. The hopper 49 is provided with an open / close confirmation sensor 50 so that it can be detected whether or not it is in the storage position.

  A two-way switching valve 51 is arranged at the upper outlet of the stone lifter 47 so that the raw brown rice is normally supplied to the stone lifter 52. Discharge ports 53x and 53y are provided on the upper inclined side of the sorting board surface 52a of the stone remover 52. The discharge port 53 has a foreign matter discharge chute 55 that leads to a foreign matter collection box 54 and a residual rice discharge chute 56 that leads to a rice mill lift described later. I'm peeping. A shutter member 57 that rotates around a rotation shaft 57 a provided at the boundary between the discharge chutes 55 and 56 is provided. The brown rice separated and discharged from the inclined lower discharge portion 58 of the sorting machine of the stone remover 52 is supplied to the brown rice tank 61 of the rice mill 60 via the rice mill lift 59. The white rice processed by the rice mill 60 is discharged out of the machine by the white rice tank 62.

  For example, 1 kg of raw brown rice is introduced into the small amount of raw material inlet 46. The introduced brown rice reaches the stone punching machine 52 via the stone lifting elevator 47, where the brown rice flows out below the slope of the sorting board and is separated from heavy debris and the like transferred to the upper slope. The stone chips accumulate on the upper surface of the shutter member 57 (FIG. 11 (A)). When the shutter member 57 is rotated at a time when the surface of the sorting board becomes small (after a predetermined time from the start of operation) (FIG. 11 (b)), the debris on the surface of the shutter member 57 is collected by the foreign material collecting chute 55 and collected. Collected in box 54. Further, the remaining rice remaining on the surface of the sorting board as the shutter member 57 is rotated moves to an upper tilted position, is collected from the remaining rice discharge chute 56, reaches the rice mill elevator 59, is stored in the brown rice tank 61, and is subjected to post-milling. . The raw material supply hopper 45 is provided with a lower limit sensor 45a so that the presence / absence of the inside of the hopper can be confirmed. When the lower limit sensor 45a is fallen, each part after a lapse of a predetermined time is controlled to stop. However, some users may bring in an end amount less than the lower limit sensor 45a. Since the lower limit sensor 45a at the time of switching is switched from on to off, the output of starting each part is not output and the rice milling process cannot be performed. Is switched from on to off and switched to the small-scale rice milling mode, and priority processing can be performed regardless of the detection result of the lower limit sensor 45a of the raw material supply hopper 45, so that no waste occurs.

  In the above embodiment, a small amount of raw material inlet 46 is charged so that it can be joined to the main path via the stone lifter 47, but the hopper 63 is placed at a high position so that it can be directly input to the stone puncher 52. It may be configured.

  In addition, a single shutter member 57 is provided at the upper outlets 53x and 53y of the sorting board of the stone remover 52, and stone dust particles are accumulated on the upper surface of the shutter member 57. Can be separated and collected into the remaining rice discharge chute 56 by blocking the remaining rice that is shaken up by the foreign matter discharge chute 55 by the shutter member 57. Conventionally, a flow path switching valve is required in addition to the discharge port shutter (see Japanese Patent Application Laid-Open No. Hei 8-192060, FIG. 9). However, if configured as described above, a single shutter member reduces the cost.

  The two-way switching valve 51 is configured on the way from the stone lifter 47 to the stone puncher 52, and FIG. 12 shows the details thereof. A tank portion 64 is formed in communication with the discharge port of the elevator 47, and a two-way switching valve 51 in the form of a rotary valve that is connected downward by forward / reverse rotation is provided in the lower part of the tank, and two discharge ports are connected to the lower part. is doing. In this way, when the two-way switching valve 51 is a forward / reverse rotary valve and the tank portion 64 is formed thereon, it is not necessary to provide a supply means such as a feeding valve in the hopper portion below the elevator 47, and the tank portion 64 drifts. Therefore, the configuration can be simplified.

  Next, the structure for preventing the sticking of rice mills will be described. The milling chamber viewed below the white rice tank 62 is provided with a hollow rotary shaft 65 formed with a threshing spiral portion 65 a and a milling roll portion 65 b on the front end side, and the surrounding portion is surrounded by a wire mesh member 63. Among these, the coil 66 is provided in the circumference | surroundings part of the grain sending spiral part 65a. An alternating current is passed through the coil 66, and the strength of the current can be changed and set. The rotary shaft 65 is configured to rotate in conjunction with a rice mill drive motor on an end pulley 67. Reference numeral 68 denotes a compression plate configured on the white rice discharge side, and is configured such that the compression pressure of the compression plate 68, that is, the whitening pressure, can be changed by a control mechanism having an internal spring. Joule heat is generated by energization of the coil 66 and rotation of the rotary shaft 65, and this heat has an effect of heating the cerealing spiral portion 65a and peeling off the attached wrinkles. The peeling effect can be changed and controlled by changing the energization amount to the coil 66 (FIGS. 13 and 14).

  FIG. 15 is configured to prevent wrinkle adhesion at the white rice outlet 70 of the rice mill. That is, a switching plate 73 is provided in the guide discharge unit 71 to the white rice tank so that the rotation position can be fixed around the horizontal axis 72, and when the milling starts, the switching plate 73 is allowed to flow down the milled rice in a steep inclination posture. Then, wrinkles are removed from the surface of the switching plate 73 while preventing sticking (FIG. 15 (a)), and then the posture is changed from a gentle inclination to a substantially horizontal posture. The white rice from the rice mill is gradually deposited with an angle of repose on the upper surface during the transition from the gentle inclination to the horizontal posture, and the subsequent white rice is discharged while sliding on the upper layer of the accumulated white rice.

As described above, when the rice bran adheres to the surface layer like brown rice or white rice, such as at the exit of a rice mill, the chaff adheres to the chute while it is being guided to discharge, and the adhering soot accumulates and requires cleaning. .
However, if a reservoir of white rice or brown rice is provided with the angle of repose of the discharge chute, the upper portion of the brown rice or white rice in the pooled state is discharged and does not come into direct contact with the guide chute. There is an effect that does not promote.

  In addition, it is set as the structure which inclines the switching board 73 which is a part of structure of the discharge chute as mentioned above, and switches to a horizontal attitude | position as mentioned above, and in the form which guides the following white rice and brown rice as mentioned above, the amount of stored grains is set. It can be adjusted, and the accumulated grains can be finally discharged by the inclination of the switching plate.

  FIG. 16 shows an example of print output in a rice milling facility as in the above example. In an unmanned rice milling facility, the user brings raw brown rice and starts the rice milling machine, etc. for a predetermined time by inputting coins, and performs the predetermined rice milling. In general, money is collected, and operation data is output to a printer at that time. In this output content, the usage time and the input money are written in time series, and in addition, the abnormality information from the abnormality detecting means arranged in each part is printed by, for example, a code number. In addition, maintenance information is added at the time of printing the abnormality information. At this time, conventionally, it is troublesome to prepare a separate manual for the handling method at the time of abnormality and to extract the corresponding part. Therefore, the corresponding page of the manual is to be described at the time of the print output. In the printing example of FIG. 16, after (1) power on, (2) power on time display, user A's (3) rice milling start time and end time, (4) rice milling required time and amount displayed ... Is done. Furthermore, the apparatus is configured to print the stop condition of the apparatus and the failure condition when a failure occurs. Explaining according to the display example, in item (5), the stop state of the apparatus is printed with a code together with the number of unit prices used. The number “3” in item (5) indicates the number of unit prices used, and the symbol “G1” indicates “normal termination of brown rice use”. The code indicating the end of the apparatus is set in advance as shown in FIG. 17, and “G2” is set to “End of use of brown rice”.

  Items (6) and after relate to the following user B. Item (8) indicates the unit price usage frequency “2”, “G2” stop, that is, “brown rice usage out of money”. Immediately thereafter, the operation is continued in item (9), and it is estimated that the same user B is in operation. From the result that “G2” ends in item (11) and an error (failure) is displayed in item (13), it is estimated that some failure has occurred in the apparatus.

  When an error (failure) is displayed in item (12), characters are displayed in item (13) in the next column, the time of occurrence is displayed in item (14), and the detailed content is displayed in code in item (15). The contents are displayed. FIG. 18 shows an example of error (failure) display contents. The determination of these errors (failures) is based on the detection results of the abnormality detection means disposed at each site in the apparatus. For example, a thermal trip by a load detection device of a power source, a whitening degree detection means, and the like. In addition, the code | symbol display of the item (15) of an example of a figure is "E0", and it determines with a thermal trip according to FIG. In this way, the data printer is configured to print out the operation stop conditions as shown in items (5) and (11) when printing this data in addition to the operation time and usage fee. It is possible to determine whether or not it has stopped due to a failure.

  In case of a failure stop, the contents are displayed as shown in items (13) to (15), so the facility manager can easily determine the usage status and the cause of the failure, and can quickly determine the cause of the failure. There are effects such as preventing troubles with users. In addition, various sensors are arranged to determine the abnormality of each part, but even if there is a sensor abnormality, it is possible to operate by operating the facility and when it is necessary to stop the operation of the facility It is possible to categorize the failure and repair the failure part while continuing the business.

  In particular, in the items (16) to (18), when an abnormality occurs, the corresponding page of the manual relating to the abnormality is described in the print output. In the example of the drawing, the title of the manual, the code number, and the corresponding page are shown in this order. At least the manual and the corresponding page can be marked as abnormal, so the inspector will respond to the trouble according to this notation, but even those who are unfamiliar with the manual can easily find the relevant part and quickly Can be dealt with.

It is a top view of a building. It is an operation panel front view. It is a control block diagram. It is a building top view which shows another example. It is the operation panel front view. Furthermore, it is another building top view. It is a time chart figure. It is a flowchart provided with a small amount insertion opening. It is operation | movement explanatory drawing of a small amount insertion port. It is the side view which carried out the partial cross section of the stone extraction machine. (A) (B) It is operation | movement explanatory drawing of a stone punching machine discharge part. It is sectional drawing which shows an example of an elevator exit part structure. It is sectional drawing of a rice polishing machine provided with the wrinkle adhesion prevention structure. It is the one part enlarged exploded view. It is a sectional side view provided with the wrinkle adhesion prevention structure of a white rice discharge part. It is an example of print output. It is an example of a driving | running completion state display. It is an abnormal code content and explanatory relationship comparison table.

Explanation of symbols

1 Machine room 2 Operation room 4 White rice tank 5a, 5b Raw material supply hopper (raw material supply part)
6a, 6b Stone extraction elevators 7a, 7b Stone extraction machines 9 Rice milling machines 11a, 11b Operation panel 11c Control units 40a, 40b Charge tank

Claims (2)

Raw material input hopper (45) for introducing brown rice, stone removing machine (52) for removing stone from the unpolished rice input to the raw material input hopper (45), and a rice milling machine for polishing rice that has been extracted with the stone removing machine (52) (60) and a rice milling facility provided with a white rice tank (62) from which polished rice is discharged, a raw material charging port (46) for charging a small amount of brown rice separately from the raw material charging hopper (45); An openable / closable hopper (49) provided at the raw material charging port (46) and a confirmation sensor (50) for confirming the opening and closing of the hopper (49). The confirmation sensor (50) is provided for the hopper (49). A rice milling facility characterized by switching to a small rice milling mode when an open state is detected .   The milled rice according to claim 1, wherein the raw material charging port (46) is provided at a position higher than the raw material charging hopper (45), and the raw material charging port (46) communicates with the stone remover (52). Facilities.

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