JP2012165707A - Crude tea producing machine, method for producing crude tea, crude tea, and method for reducing microorganism in crude tea - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crude tea producing machine which reduces microorganisms in crude tea by a kneading/twisting means and a conveying means without a heating means for heating tea leaves; a method for producing crude tea; the crude tea; and a method for reducing microorganisms in the crude tea.SOLUTION: In the first embodiment, the crude tea producing machine at least includes: a steam-heating means; a rough kneading means; the kneading/twisting means, an intermediate kneading means, and the conveying means. The kneading/twisting means includes a kneading board, a kneading mortar which turns on the kneading board and which has a sweeping brush supported to the hem, and a cone-shaped pressure-kneading board disposed within the kneading mortar for pressing the tea leaves on the kneading board. The kneading board has a low-adherent surface member in a prescribed range close to the outer circumference.

Description

  The present invention relates to a crude tea production machine for reducing the number of microorganisms in crude tea, a method for producing crude tea, and a method for reducing the number of microorganisms in crude tea and crude tea.

  In recent years, tea has been used for unprecedented food applications such as plastic bottle drinks, sweets, and bread. When tea is used as a raw material for plastic bottle beverages or as a food material, it is treated as a food raw material, and it is necessary to comply with microbial standards established by the host company. Because it may cause troubles such as rusting, rough tea with a large number of bacteria is avoided from the traders. Therefore, it is desired to reduce the number of microorganisms such as general viable bacteria and coliform bacteria in the crude tea used as a raw material for foods and beverages, preferably to make it negative. Efforts are being made to reduce the number of microorganisms in crude tea in a crude tea production machine equipped with steaming means, rough kneading means, twisting means, medium pouring means, refinement means, drying means, etc. Method for increasing the steaming time of tea leaves in Non-Patent Document 1, Non-Patent Document 2 and a method for increasing the integrated temperature (temperature × time) of tea leaves processed in the dryer of the drying means (Patent Document 1) It has been known. Patent Document 2 discloses that the number of coliforms is reduced by performing sterilization on a cooler, a leaf cutter, and a coarse koji before tea making.

JP 2001-128618 A JP 2009-278946 A

Seimura Sawamura, Ichiro Kato, Takahiro Ohya, Eri Ito (Nakano) Eri (2003): Microbial environment of Sencha 2-Reduction of the number of microbial teas-, Tea Research Reports, 96, 57-62 Seimura Sawamura, Ichiro Kato, Takahiro Ohya, Eri Ito (Nakano) Eri (2002): Microbial management of green tea as a beverage ingredient, Japanese Soft Drinks Study Group “12th Conference” Lecture, 19-24

  Patent Document 1, Non-Patent Document 1, and Non-Patent Document 2 disclose a reduction in the number of viable bacteria in crude tea by directly heat-treating tea leaves. However, the heat treatment of tea leaves affects the tea quality such as light blue color, aroma, and taste, and therefore has a drawback that it cannot be sufficiently heat-treated depending on the crude tea produced. Non-patent document 2 suggests secondary contamination of tea leaves in the tea making process by microorganisms remaining in the tea making machine during the rough tea manufacturing process. It is difficult to deal with. If the tea machine is thoroughly cleaned, secondary contamination from the tea machine can be reduced. However, in a large tea factory where a large number of tea machines are located, all the machines should be cleaned only by workers every day. This is hard work and is very difficult in practice.

  Patent Document 2 discloses that the number of coliforms is reduced by heat-treating a cooler, a leaf cutter, and a coarse koji before tea making. By performing simple cleaning and heat treatment, the labor of the worker is reduced, but not a few microorganisms remain even after these treatments, and further reduction of the number of microorganisms has been desired.

  An object of the present invention is to provide a crude tea production machine, a crude tea production method, and a method for producing crude tea and crude tea that reduce the number of microorganisms of crude tea in a twisting means and a conveying means that do not include means for heat-treating tea leaves. It is to provide a method for reducing the number of microorganisms.

  In order to solve the above-mentioned problems, the present invention provides the first means, wherein the twisting means is a rough tea making machine comprising at least steaming means, rough kneading means, twisting means, intermediate punching means, and conveying means. , A board, a rice bowl that swivels on the board and sweeps into the bottom and supports the brush, and a substantially conical board that is disposed in the board and presses the tea leaves on the board. The grid is a rough tea making machine in which a predetermined range near the outer periphery is a low adhesion surface member.

  In the second means, in the rough tea making machine provided with at least steaming means, rough kneading means, twisting means, intermediate punch means, and conveying means, both sides of the conveying surface of the conveying means are corners of 10 mm or more. A rough tea making machine having at least one trough-type vibratory conveyor having R and treated with a fluororesin on a part or all of the surface of the conveying surface at least after the steaming means and before the intermediate means.

  In the third means, in the rough tea making machine provided with at least steaming means, rough kneading means, twisting means, intermediate punching means, and conveying means, the twisting means includes a grilling board and on the grilling board. And a swivel bowl that swivels and supports a brush at the skirt, and a substantially conical crusher that is disposed in the claw bowl and presses the tea leaves on the board, and the board is closer to the outer periphery. A trough type in which a predetermined range is a low adhesion surface member, both side portions of the conveying surface of the conveying means have corners R of 10 mm or more, and a part or all of the surface of the conveying surface is treated with fluororesin This is a crude tea making machine provided with at least one vibrating conveyor at least after steaming means and before the middle bowl means.

  The fourth means is the rough tea making machine of the first means or the third means in which the outer peripheral side is a surface member having a low adhesion property than the movable region of the central axis of the substantially conical scooping platen.

  The fifth means is the rough tea manufacturing machine of the first means, the third means or the fourth means in which the low adhesion surface member is made of fluororesin.

  The sixth means is the rough tea making machine of the first means, the third means, the fourth means, or the fifth means, wherein the wire diameter of the brush material of the sweeping brush is less than 0.6 mm.

  The seventh means is crude tea produced by using the crude tea making machine of any one of the first to sixth means.

  The eighth means is a method for producing crude tea using the crude tea production machine according to any one of the first to sixth means.

  The ninth means is a method for reducing the number of microorganisms of crude tea using the crude tea production machine of any one of the first to sixth means.

  The tenth means is a rough tea making machine according to any one of the first to sixth means provided with the steamed leaf processing means, and at least the steamed leaf processing means and the rough koji means are each sterilized before the production. It is a manufacturing method.

  The eleventh means is crude tea produced by using the production method of the tenth means.

  The twelfth means is a method for reducing the number of microorganisms of crude tea using the production method of the tenth means.

  By using the rough tea manufacturing machine, the rough tea manufacturing method, and the method for reducing the number of microorganisms in rough tea according to the present invention, it is possible to reduce the labor of workers and provide high-quality rough tea with a reduced number of microorganisms. It becomes possible.

Illustration of an example of crude tea making machine Front view of twister of rough tea making machine of the present invention Side view of twister of rough tea making machine of the present invention Drawing of the board of the twister of the rough tea making machine of the present invention Figure of sweeping brush of twister of rough tea making machine of the present invention Side view of trough-type vibratory conveyor The figure of an example of the shape of the trough of the trough type vibration conveyor of the present invention Figure of layout of rough tea making machine of the embodiment of the present invention A graph of the water activity graph of tea leaves after each of the fresh leaves, steaming means, steamed leaf processing means, rough koji means, twisting means, middle koji means, and koji means in the crude tea making machine

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. The crude tea making machine is the first machine that processes fresh leaves picked from the tea plantation, and mainly inactivates the oxidase contained in the fresh leaves and the water contained in the tea leaves inactivated oxidase. It consists of a step of removing it stepwise and processing it while drying. As an embodiment of the crude tea making machine, as shown in FIG. 1, steaming means 2, steamed leaf processing means 3, rough kneading means 4, twisting means 5, intermediate punching means 6, refined kneading means 7, drying It comprises means 8 and conveying means 1 for connecting the respective means, and crude tea is produced from fresh leaves. In the production of the crude tea of the steamed ball green tea, the brewing means 7 may be omitted, and the crude tea production machine differs depending on the intended crude tea. In this invention, it is set as the rough tea manufacturing machine provided with the at least steaming means 2, the rough koji means 4, the twisting means 5, the middle potting means 6, and the conveyance means 1.

  The steaming means 2 includes a steamer in which steam is applied to the fresh leaves for an appropriate time (for example, 90 seconds), and the oxidase contained in the fresh leaves is inactivated by the heat of the steam. The steamer has a zoning type and a rotary stirring type, but is not limited to these. Steaming heat has a great impact on the color and quality of green tea.

  The rough culling means 4 includes a step of uniformly drying tea leaves while feeding hot air, and includes a rough culm 41 and a leaf cutter 42 similar in structure to the rough culm 41. For example, you may connect the machine of the some roughing means 4 like the leaf punching machine 42 and the rough roughing machine 41, or the leaf punching machine 42, the first roughing roughing machine, and the second roughing roughing machine. In the fixed drum of the roughing machine 41 to which the hot air from the furnace is blown, the tea leaves are scooped up by the wiper, and after being dropped on the bottom of the bowl, the grinders pressurize. It is preferable that the roughing means 4 is provided with a cleaning processing means, and the cleaning processing means is preferably a high-pressure cleaning device. Furthermore, it is preferable that the rough slag means 4 is provided with a sterilization process means, and the furnace of the rough slag means 4 can be used as a sterilization process means.

  The twisting means 5 as the core means of the present invention will be described. The twisting means 5 squeezes out the water in the tea leaves and makes the water in the tea leaves uniform, and there is a twisting machine 51. The twisting machine 51 includes a checkerboard 53 provided in the form of a base plate on a substantially upper surface of an appropriate frame 52, a checkered bowl 54 that moves while circularly turning on the checkerboard 53, and being supported by the twister bowl 54. A crushing platen device 55 that crushes the tea leaves supplied on the crib 53 is configured as a main member. The pestle mortar 54 has a cylindrical shape and is supported by three crank-type arms 56 around the periphery thereof. The rotator mortar 54 rotates eccentrically on the basin 53 as the arm 56 rotates. Since the arm 56 is dangerous due to rotation, an arm cover 57 is provided, and a sweeping brush 72 is provided around the skirt of the mortar and screw bowl 54 so as to surround the arm 56.

  The crushed platen device 55 is arranged so as to cross the upper side of the pestle bowl 54 while supporting the crushed platen 58 in a suspended state mainly with a substantially conical crushed platen 58 that exerts a crushed pressure action on the tea leaves on the platen 53. Further, the weight rail 59 and the weight 60 having the function of adjusting the pressure state while sliding on the weight rail 59 are configured. The weight rail 59 rises vertically from one of the arms 56 and is swingably disposed with respect to the rail support plate 61 that is also in contact with the side surface of the mortar bowl 54. The bottom surface of the scooping platen 58 is centered on the bottom surface of the scooping platen on the central axis 63 that extends in the vertical direction of the support 62 between the scooping platen 58 and the weight rail 59 so that the tea leaves are dispersed in the crucible 54. 64 has a shape protruding downward. The weight 60 arranged on the weight rail 59 can be moved to an appropriate position on the weight rail 59 manually or by the power of the weight motor 65. As the weight 60 goes to the free end of the weight rail 59, the pressure action of the pressure board 58 increases.

  The metal (stainless steel, etc.) or wooden board 53 includes a take-out board 66 that opens downward and a fixed board 68 that contacts the outer periphery 67 in order to take out tea leaves when the twisting process is completed. A plurality of convex twisting hills 69 are arranged on the arc 53 from the center on the arc. In the present invention, a fluororesin steel plate 70 (for example, thickness 0.45 mm) coated with fluororesin is affixed in an annular shape near the outer periphery of the fixed grid 68. The attachment range is arbitrary near the outer periphery of the fixed platen 68, but the center axis of the pressure platen 58 is designed to effectively squeeze out the moisture in the tea leaves and prevent the tea leaves that have been squeezed from remaining near the outer periphery of the platen 53. It is preferable to be outside the hatched portion of FIG. Further, the low adhesion surface member to be attached near the outer periphery of the fixed board 68 is made of fluororesin in this embodiment, but it is compared with a metal (such as stainless steel) or wood used in the board 53. Any material that has a low coefficient of friction and does not easily adhere to tea leaves may be used. In addition to attaching the fluororesin steel plate 70, attaching fluororesin to the surface of the grid 53, spraying fluororesin paint onto the surface of the grid 53, coating fluororesin treatment such as coating, or pasting polyethylene resin Etc.

  As shown in FIG. 5, the sweeping brush 72 is formed by folding a plurality of brush members 73 in half, sandwiching the core wire 74 between the two folded portions 73a, and forming a portion of the brush member 73 sandwiching the core wire 74 in a channel having a U-shaped cross section. 75 sandwiches and forms a brush body 76. The brush body 76 is fixed with screws 79 so as to be sandwiched between the mounting ring 77 and the mounting bracket 78. The mounting ring 77 is supported by the hem of the mortar and screw bowl 54 so that the end 73 b of the brush material 73 is substantially in contact with the grid 53. Further, although the left and right lengths of the folded brush material 73 of the brush body 76 of FIG. 5 are equal, brush bodies 76 having different left and right lengths may be used. The wire diameter of the brush material 73 is preferably less than 0.6 mm, and particularly preferably 0.2 to 0.4 mm, which has an appropriate strength for sweeping into the movable region 71 on the grid 53.

  Conveying means 1 performs the process of conveying tea leaves to the next means after finishing the process in each means in the crude tea making machine, and includes trough-type vibrating conveyor 11, bucket conveyor 12, belt conveyor 13 and the like. . In the trough type vibration conveyor 11, the trough 14 is supported by the gantry 16 via the leaf spring 15, and the trough 14 vibrates in the horizontal direction by the crank 18 of the vibration driving unit 17. As shown in FIG. 7, the transport surface 19 that transports the tea leaves of the trough 14 rises from the side portions 20 a and 20 b of the transport surface bottom surface 20 to form a curved transport surface side surface 21 so as to have a curved surface in an arc shape. The corner R22 serving as the radius of the arc is 10 mm or more. The radius of the arc is preferably 20 mm or more, and more preferably 50 mm or more. Further, the entire trough 14 or at least all or a part of the conveying surface 19 may be subjected to fluororesin processing such as sticking of a fluororesin tape, sticking of a fluororesin steel plate, spraying of a fluoropaint, and clothing processing. preferable.

  The middle punch means 6 is mainly provided after the twisting means 5, and a step of drying uniformly is performed while loosening the lump of tea leaves. The intermediate machine includes a fixed cylinder type intermediate machine having a structure substantially the same as that of a rotary cylinder type intermediate machine and a rough type machine, and the intermediate means 6 may be formed by combining the fixed cylinder type intermediate machine and the rotary cylinder type intermediate machine.

  The rough tea making machine of the present invention is a rough tea making machine provided with at least steaming means 2, rough kneading means 4, twisting means 5, middle roasting means 6, and conveying means 1. In order to produce high-quality crude tea, other means such as steamed leaf processing means 3, sperm kneading means 7, and drying means 8 may be added. The order of means is not limited. For example, the steaming processing means 3 performs a process of processing the tea leaves after the steaming means 2 before the rough kneading means 4, and applies a pressure by rotating the cooler for cooling the tea leaves or the tea leaves in the round cylinder. And softening machines. The cooler removes moisture adhering to the tea leaves by passing the tea leaves after the steaming means 2 through a machine in which wind such as warm air or cold air flows, and cools the tea leaves that have become hot (for example, cools to room temperature) ), And by drastically lowering the product temperature, the color of the tea leaves can be improved and high quality tea leaves can be obtained. Moreover, it is preferable that the steamed leaf processing means 3 includes a sterilization processing means.

  The sterilization treatment means means a reduction or negativeization treatment of the number of microorganisms, and includes, for example, sterilization treatment by heating (for example, hot air) and sterilization treatment means by chemicals. The sterilization treatment means may be carried out before the tea leaves are put into each means.

  The sterilization processing means of the steamed leaf processing means 3 by heating may be heated to such an extent that the number of microorganisms present in the steamed leaf processing means 3 (for example, a hot air cooling device) is reduced or negated, for example, 2700 ° C./min or more. , Preferably 3000 to 6000 ° C./minute, more preferably 4500 to 6000 ° C./minute, and the hot air is at least 80 ° C., preferably 100 to 120 ° C. The treatment time is 30 minutes or more, preferably 45 to 90 minutes, more preferably about 60 to 90 minutes. Moreover, it is preferable to wash before sterilizing. The cleaning process is to wash the steamed leaf processing means 3, but the cleaning time and the cleaning method are not limited. Reduction of the number of microorganisms is promoted or made negative by the washing treatment and sterilization treatment of the steamed leaf treatment means 3.

  The heat sterilization treatment of the coarse koji means 4 is particularly preferably a hot air treatment, and the hot air is 80 to 120 ° C., preferably 90 to 120 ° C., more preferably 100 to 120 ° C., and the treatment time is 10 minutes or more. , Preferably 30 to 90 minutes, more preferably 45 to 90 minutes, and the treatment time after the temperature in the fixing cylinder of the rough culling means 4 and the rough culling machine 41 exceeds 60 ° C. is 30 minutes. As mentioned above, Preferably it is 45 to 90 minutes, More preferably, it is 60 to 90 minutes. Microorganisms contained in tea leaves in front of the twisting means 5 by performing the heat sterilization treatment at an accumulated temperature of at least 1000 ° C. · min., Preferably 2000 to 6000 ° C. · min, more preferably 3000 to 6000 ° C. · min. It is possible to achieve a reduction by suppressing the growth of

  The method for reducing the number of microorganisms of crude tea according to the present invention is a crude tea production machine comprising at least steaming means 2, rough kneading means 4, twisting means 5, middle straw means 6, and conveying means 1. This is a method for reducing the number of microorganisms in crude tea, which comprises both the twisting means 5 of the present invention and the conveying means 1 of the present invention, or any means, to produce crude tea. Furthermore, in addition to providing the twisting means 5 and the conveying means 1 of the present invention, it is a method for reducing the number of microorganisms of crude tea by sterilizing the steamed leaf processing means 3 and the coarse straw means 4 before producing crude tea.

  The rough tea and the rough tea production method of the present invention include at least a steaming means 2, a rough koji means 4, a koji twisting means 5, a middle koji means 6 and a conveying means 1, and the kneading means of the present invention. 5 and crude tea and a method for producing crude tea, which are produced using a crude tea production machine provided with both or any one of the conveying means 1 of the present invention. Furthermore, in addition to providing both or any one of the twisting means 5 of the present invention and the conveying means 1 of the present invention, the crude tea production in which the steamed leaf treatment means 3 and the coarse koji means 4 are sterilized before the crude tea production. It is the manufacturing method of rough tea and rough tea manufactured using a machine.

Next, examples will be described. In the layout shown in FIG. The crude tea is produced by the crude tea production machines 100, 150, 200, 250, 300, 350, and 400 that have performed the processing shown in Table 1. The tea leaves plucked in the tea plantation stored in the fresh leaf container 81 are put into the steaming means 2, and the steamed leaf processing means 3, the rough kneading means 4, the twisting means 5, the middle punching means 6, the koji means 7, the drying means 8, The tea is sequentially transported to the assembling means 9 through the transporting means 111, 112, 113, 114, 115, 116, 117, 118, and rough tea is produced.

  In the crude tea manufacturing machine 200, the water activity of fresh leaves and tea leaves after completion of each means of steaming means 2, steamed leaf processing means 3, coarse koji means 4, twisting means 5, middle koji means 6 and refined koji means 7 is measured. It was measured.

  As shown in FIG. 9, from raw leaves (water activity 0.99) to steaming means 2 (water activity 0.99), steamed leaf treatment means 3 (water activity 0.99), and rough straw means 4 (water activity 0.98). ), While the water activity up to the twisting means 5 (water activity 0.98) is 0.98 or more, the meandering means 6 (water activity 0.91) and the vagina means 7 (water activity 0.68) As a result, the result decreased significantly. In general, when the water activity is 0.91 or less, it is said that the growth of many microorganisms serving as food hygiene indicators is suppressed. In the crude tea production machine, there is a high possibility that microorganisms will grow in the means (steamed leaf processing means 3, rough koji means 4, twisting means 5, etc.) prior to the medium rice cake means 6, and the secondary contamination of the microorganisms in the rough tea is prevented. In order to protect, it was shown that it is preferable to protect before the middle rod means 6 before the middle rod means 6, particularly after the steamed leaf treatment means 3 where the raw leaves are heated with steam.

  Crude tea was produced by the rough tea making machine 300 of the present invention, in which the twisting means 5 was a twisting machine 51 in which a fluororesin steel plate 70 was attached to the outer periphery of a wooden board 53. Moreover, the fluororesin steel plate 70 near the outer periphery of the grid 53 is provided with an unattached twisting machine 51, and the rough tea manufacturing machine 200 that is substantially the same as that of the present invention is used as a control.

  The tea leaves that have finished the process of the roughing machine 41 of the roughing means 4 are transferred to the twisting machine 51 of the twisting means 5 through the conveying means 1 such as the trough-type vibrating conveyor 115a and the bucket conveyor 115b, and the twisting means 5 from the chute 80. Is put into the mortar and mortar 54 of the mortar 51. The mortar and screw bowl 54 in which the tea leaves are introduced moves on the grid 53 while turning by the horizontal movement of the crank-type arm 56. At the same time as the tea leaves in the pestle mortar 54 move on the basin 53 while being sandwiched between the cradle 58 and the basin 53 supported by the weight rail 59 arranged so as to cross the upper part of the mortar 54, The twisting is performed by the weight of the twisting plate 58 rotating in the twisting bowl 54. During the process of the twisting means 5, the weight 60 is controlled by moving the weight 60 manually or electrically while watching the state of the tea leaf so that the moisture inside the tea leaf oozes out to the surface and the moisture of the whole tea leaf becomes uniform. . When the moisture of the tea leaves becomes uniform and the twisting by the twisting machine 51 is completed, the weight 60 is moved so that no pressure is applied to the tea leaves, the take-out board 66 is opened downward, and the tea leaves are placed on the trough vibration conveyor 115a. It is dropped and transported to the next intermediate means 6 via the bucket conveyor 115b and the like.

  The tea leaves in the twister bowl 54 are twisted so as to be dispersed without being clumped, and some of the tea leaves are discharged toward the outer periphery of the holder 53 through the gap between the anchorboard 53 and the twister bowl 54. The discharged tea leaves are returned to the central part of the grid 53 composed of the take-out board 66 and the fixed board 68 on which the fluororesin steel plate 70 is not pasted by the sweeping brush 72 attached to the skirt of the swirling bowl screw bowl 54. .

The number of microorganisms (general viable count) on the grid 53 after about 6 hours or more from the end of tea making was confirmed by wiping inspection of general viable bacteria (Table 2). The general viable count is the number of microorganisms obtained by culturing in standard agar at 30 to 37 ° C. for 48 hours in an aerobic environment (aerobic). The confirmation was done for Ichibancha and Nibancha.

  As shown in Table 2, the general viable cell count is reduced by the rough tea making machine 300 of the present invention, and the effect of reducing the bacteria by attaching the fluororesin steel plate 70 near the outer periphery of the grid 53 is confirmed. It was. The tea leaves discharged on the fluororesin steel plate 70 near the outer periphery of the ladle 53 of the twisting machine 51 of the present invention do not remain on the fluororesin steel plate 70 and the sweep brush 72 rotates smoothly so that the ladle 53 While being swept into the central part, the metal or wooden cradle 53 is subjected to sufficient squeezing in the central part of the metal or wooden cradle 53 to which a desired squeezing pressure is applied, and moisture remaining in the stem or tea leaves is squeezed out. Further, in the present invention, the tea leaves near the outer periphery of the grid 53 are efficiently swept into the central side of the grid 53 composed of the take-out board 66 and the fixed grid 68, so that the deformation of the brush is suppressed, and therefore the sweep is performed. The effect of suppressing the decrease in the embedding function was confirmed. In addition, the number of general viable bacteria produced in the crude tea with the crude tea production machine 300 was smaller than that in the crude tea production machine 200 (Table 5).

Crude tea was produced with the rough tea making machine 250 of the present invention equipped with the twisting machine 51 that swept the twisting means 5 and made the wire diameter of the brush material 73 of the brush 72 0.3 mm. Table 3 shows the results of the general viable count test of the brush material 73 that has passed 6 hours or more after the production of crude tea. A rough tea making machine 200 provided with a twisting machine 51 in which the wire diameter of the brush material 73 was 0.6 mm was used as a control.

  As shown in Table 3, the number of viable bacteria was reduced at the wire diameter (0.3 mm) of the brush material 73 of the twisting machine 51 of the rough tea manufacturing machine 250 of the present invention. In addition, the number of general viable bacteria in the crude tea was less when the crude tea was produced with the crude tea production machine 250 than with the crude tea production machine 200 (Table 5).

A fluororesin tape is attached to the entire conveying surface 19 of the trough-type vibrating conveyor 114a provided at the lower part of the roughing machine 41 of the roughing means 4 and the trough-type vibrating conveyor 115a provided at the lower part of the twisting machine 51. The crude tea was produced with the crude tea production machine 350 provided with the conveying means 114, 115 in which the corner R22 of the trough 14 was 10 mm. When the processes of the roughing machine 41 and the twisting machine 51 are finished, the tea leaves are discharged onto the conveying surface 19 of the trough-type vibrating conveyors 114a and 115a, and transferred to the bucket conveyors 114b and 115b by the vibration of the trough 14, It is conveyed to the twisting means 5 and the intermediate punching means 6 in the process. Table 4 shows the number of general viable bacteria in the wiping inspection of the conveying surface 19 after about 12 hours have passed since the tea making. It was confirmed at the first tea time and second tea time. As a control, a trough-type vibrating conveyor made of stainless steel trough (fluorine resin tape not attached) having a substantially right angle on the side of the conveying surface is arranged on the conveying means 1 for transferring tea leaves of the roughing machine 41 and the twisting machine 51. A crude tea making machine 200 provided at the bottom was used.

  As shown in Table 4, the number of general viable bacteria was reduced for both the trough-type vibrating conveyors 114a and 115a of the rough tea making machine 350 of the present invention compared to the control. In addition, the transport surface 19 can be easily cleaned. In addition, the number of general viable bacteria produced in the crude tea was lower in the crude tea production machine 350 than in the crude tea production machine 200 (Table 5).

Crude tea was produced using the rough tea production machines 100, 150, 200, 250, 300, 350, and 400 having the layout shown in FIG. Based on the food hygiene inspection guidelines, the number of viable bacteria in the produced crude tea was confirmed. The results are shown in Table 5.

  As shown in Table 5, the crude tea produced by the crude tea making machines 250, 300, 350 of the present invention is more commonly used than the control crude tea making machine 200, which is a conventional crude tea making machine. Viable count was reduced. Further, a fluororesin steel plate 70 is affixed near the outer periphery of the wooden grid 53, a twisting machine 51 having a wire diameter (0.3 mm) of the brush material 73 is disposed, and a lower part of the roughing machine 41 of the roughing means 4. The trough-type vibrating conveyor 114a provided and the trough-type vibrating conveyor 115a provided at the lower part of the twisting machine 51 are all attached to the conveying surface 19 with a fluororesin tape, and the trough 14 has a conveying means 114 having a corner R22 of 10 mm. , 115, the number of general viable bacteria was reduced compared to the crude tea production machines 200, 250, 300, and 350.

  Compared to the conventional crude tea manufacturing machine 200, the number of general viable bacteria was reduced in the crude tea manufacturing machine 150 in which the steamed leaf processing means 3 and the crude koji means 4 were washed and sterilized. Furthermore, in the crude tea production machine 100 in which the steamed leaf processing means 3 and the coarse koji means 4 of the crude tea production machine 400 were washed and sterilized, a significant reduction in the number of general viable bacteria was confirmed compared to any other.

DESCRIPTION OF SYMBOLS 1 Conveyance means 2 Steaming means 3 Steamed leaf processing means 4 Coarse dripping means 5 Twist means 6 Middle anchor means 7 Precision means 8 Drying means 9 Combined means 11 Trough type vibration conveyor 12 Bucket conveyor 13 Belt conveyor 14 Trough 15 Leaf spring 16 Pedestal 17 Vibration drive unit 18 Crank 19 Conveying surface 20 Conveying surface bottom surface 20a Side portion 20b Side portion 21 Conveying surface side surface 22 Corner R
41 Crusher 42 Leaf Cutter 51 Folding Machine 52 Frame 53 Scissor 54 Spiral Bowl 55 Crushing Plate Device 56 Arm 57 Arm Cover 58 Crushing Plate 59 Weight Rail 60 Weight 61 Rail Support Plate 62 Supporting Unit 63 Center Axis 64 Centering Pressure Bottom Center Part 65 Weight motor 66 Unloading board 67 Peripheral part 68 Fixed board 69 Spiral hill 70 Fluororesin steel plate 71 Movable region 72 Sweep brush 73 Brush material 73a (Brush material) Folded part 73b (Brush material) End 74 Core wire 75 Channel 76 Brush body 77 Mounting wheel 78 Mounting bracket 79 Screw 80 Chute 81 Fresh leaf container 111 (Transfer from raw leaf container to twisting means) Conveying means 112 (From steamed leaf processing means to rough culling means) Conveying means 113 (Leaf punching machine) 114) (from roughing machine to roughing machine) 114a trough-type vibratory conveyor 114b bucket conveyor 115 (conveyor from twisting means to middle anchor means) 115a trough-type vibratory conveyor 115b bucket conveyor 116 (from middle anchor means to precision means) Means 117 Conveying means (from scouring means to drying means) 118 Conveying means (from drying means to assembly means)

Claims (12)

  In a rough tea making machine provided with at least steaming means, rough crumpling means, twisting means, intermediate punching means, and conveying means, the twisting means swivels on the board and swivels to the skirt. A bowl having a sweeping brush, and a bowl having a substantially conical shape arranged in the bowl to press the tea leaves on the board, and the board has a low adhesion in a predetermined range near the outer periphery. A rough tea making machine characterized by the fact that it is made of a surface material.   In the rough tea making machine provided with at least steaming means, rough kneading means, twisting means, intermediate punch means, and conveying means, both sides of the conveying surface of the conveying means have corners R of 10 mm or more, Furthermore, one or more trough-type vibratory conveyors in which a part or all of the conveying surface is treated with a fluororesin are provided after the steaming means and before the middle bowl means.   In a rough tea making machine provided with at least steaming means, rough crumpling means, twisting means, intermediate punching means, and conveying means, the twisting means swivels on the board and swivels to the skirt. A bowl having a sweeping brush and a bowl having a substantially conical shape arranged in the bowl to press the tea leaves on the board, and the board has a low adhesion to a predetermined range near the outer periphery. A trough-type vibratory conveyor, which is made of a conductive surface member and has corners R of 10 mm or more on both sides of the conveying surface of the conveying means, and further, a part or all of the conveying surface is treated with fluororesin In addition, a crude tea making machine characterized in that one or more of them are provided in front of the middle bowl means.   The rough tea making machine according to claim 1 or 3, wherein a surface member having a low adhesion is formed near the outer periphery of the movable area of the central axis of the rolling platen on the rolling plate.   The rough tea making machine according to claim 1, wherein the low adhesion surface member is a fluororesin.   The rough tea making machine according to claim 1, 3, 4, or 5, wherein a wire diameter of the brush material of the sweeping brush is less than 0.6 mm.   A crude tea produced by using the crude tea production machine according to any one of claims 1 to 6.   A method for producing crude tea, comprising producing crude tea using the crude tea production machine according to any one of claims 1 to 6.   A method for reducing the number of microorganisms of crude tea, comprising producing crude tea using the crude tea production machine according to claim 1.   The crude tea making machine according to any one of claims 1 to 6, further comprising a steamed leaf processing means, wherein at least the steamed leaf processing means and the crude koji means are sterilized before producing crude tea. A method for producing crude tea.   A crude tea produced by using the method for producing crude tea according to claim 10.   A method for reducing the number of microorganisms in crude tea, characterized in that the method for producing crude tea according to claim 10 is used.

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