JPS62146558A - Apparatus for controlling constant rate feeding of raw tea leaf - Google Patents

Abstract

PURPOSE:To keep the weight of tea leaves in a steaming apparatus at a con stant level and to enable stable steaming of tea leaves without fail, by measur ing the period necessary to discharge a prescribed weight of tea leaves from a steaming apparatus and controlling the amount of tea leaves supplied to the steaming apparatus according to the length of the period. CONSTITUTION:A conveyor 1 for feeding tea leaves to a steaming apparatus has controllable speed and a conveyor 6 for receiving tea leaves discharged from a steaming apparatus 2 and transferring the leaves to a cooling apparatus 7 is provided with a metering means 5 and a timer 8 to measure the period necessary to accumulate a prescribed weight of tea leaves discharged from the steaming apparatus 2. The measured period is compared with preset period by an arithematic circuit 10 and the speed of the conveyor 1 is controlled based on the result.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field) The present invention relates to a device for controlling green tea leaves fed into a steamer.

(Prior art) Tea leaves picked in tea gardens can be from tea to tea, irrespective of the size of the leaves, young leaves, old leaves, weight, etc.
Uniform steaming cannot be expected unless a fixed amount of picked tea leaves are continuously fed to the steamer.

For this reason, regarding the device for feeding a fixed amount of green tea leaves to a steamer, Japanese Patent Laid-Open No. 59-166037,
Japanese Unexamined Patent Publication No. 59-227242, Torakai 59-175
Various proposals have been made in Publication No. 134, etc., but all of these devices target tea leaves before being put into the steamer.
The weight of the green tea leaves fed into the steamer is controlled by measuring the weight, so the weight of the tea leaves inside the steamer is not constant due to differences in the size and quality of the tea leaves, resulting in The problem of uneven steaming still remains.

(Purpose) The present invention was made in view of these problems, and its purpose is to improve the accuracy of steaming tea leaves, regardless of the size or quality of the tea leaves input into the steamer. The purpose of the present invention is to provide a new quantitative feeding device for fresh tea leaves.

(Means for Achieving the Object) That is, the present invention is characterized by a controllable tea leaf supply means disposed on the supply side of the steamer, and a metering means disposed on the discharge side of the steamer. The tea leaf conveying means provided, a timing means for measuring the required discharge time until the tea leaves discharged from the steamer reach a set weight, and the required discharge hanging time measured by the timing means, are compared with the set time, and the ratio is calculated. and a control means for controlling the supply amount of the tea leaf supply means.

(Example) The details of the present invention will be described below based on illustrated examples.

FIG. 1 shows an embodiment of the present invention, and reference numeral 1 in the figure indicates a conveyor for conveying green tea leaves fed into a hopper 1a from a vertical conveyor or the like (not shown) toward a steamer 2.
The drive motor 3 is configured such that its rotational speed is controlled by a signal from a meter 5, which will be described later, via a motor speed control circuit 4.

On the other hand, the reference numeral 6 in the figure is a conveyor that receives the tea leaves discharged from the steamer 2 and sends them to the next cooler 7, and this conveyor 6 is supported on a measuring device 5 consisting of a load cell or the like.
It is controlled so that when it receives a preset weight of tea leaves, for example 1 to 9 tea leaves, from the steamer 2, it rotates rapidly and performs a batch conveying operation in which the tea leaves are sent to the cooler 7.

Reference numeral 8 denotes a timing circuit that starts a timing operation in response to a conveyance operation end signal of the conveyor 6, and ends the timing operation when the weight of the tea leaves discharged onto the conveyor 6 reaches a preset weight, for example, IK9. It is configured to measure the required ejection time until the amount ejected from the apparatus 2 reaches a preset weight, and to sequentially input the time signal to the next averaging circuit 9.

The averaging circuit 9 is a circuit that calculates the average required discharge time when the amount of discharge from the steamer 2 is stable. For example, if the reference time is set to 15 seconds in a steamer with a steaming time of 90 seconds, The processing operation is set in advance to cancel the first three times when the amount of discharge from steamer 2 is unstable and to average the smaller three times, and each time the average time is calculated, this value is used in the next calculation. Output to circuit 10.

The calculation circuit 10 calculates the ratio between the average required discharge time input here and the set reference time input from the setting circuit 11, and outputs an output signal proportional to the ratio to the motor speed control circuit 4 to control the conveyor. Controls motor 3.

In the above embodiment, when the steamed tea leaves are discharged from the steamer 2 onto the container 6 and the discharge amount reaches a preset weight, for example 1 to 9, the scale 5 controls the output signal. The condenser is operated at high speed to send the discharged tea leaves to the next cooler 7, and at the same time, a signal that reaches 1 to 9 is output to the reset terminal of the timer circuit 8 to count the time from the beginning of discharge. The operation of the timing circuit 8 which has already started is stopped, and a signal corresponding to the required discharge time until the discharge weight of tea leaves reaches 1 to 9 is inputted to the next averaging circuit 9.

Among the input signals from the clock circuit 8, the averaging circuit 9 cancels the signals input at the initial unstable period based on a preset program, and then calculates the required discharge time several times after stabilizing. is averaged, and outputs the average @ to the next arithmetic circuit 10, where it is compared with a reference time preset by the setting circuit 1. If the average value is smaller than the set value, the steamer 2 Since the amount of tea leaves discharged from the chaff is large, the rotation speed of the motor 2 of the container 1 is controlled via the motor speed control circuit 4 by an amount corresponding to the ratio, and conversely, if the speed is greater than the average value or set value, the speed of the steamer is controlled. In order to increase the amount of tea leaves discharged, the rotation rate i of the motor 3 is increased to increase the amount of tea leaves supplied into the steamer 2.

For example, in a steamer with a steaming time of 90 seconds, if the weight of tea leaves discharged is set to 1 to 9 and the standard time of tea leaf discharge is set to 15 seconds, the averaging circuit 9 is set to the timing circuit 8 as shown in Table 1. A signal corresponding to the required discharge time for 6 times is input, and the tea leaf discharge weight is changed to 1 to 9 in the steamer with a steaming time of 180 seconds.
When the standard time for discharging tea leaves is set to 15 seconds, a signal corresponding to the required discharging time for 12 times as shown in Table 2 is input to the averaging circuit 9; The first 3 or 9 times where the emission amount is not stable are canceled, the latter 3 times are averaged, and the average time is 13.6 seconds or 14.16 seconds.I output it to the next calculation circuit 10,
Compared to the standard time of 15 seconds set there, the ratio is 90.
．． The amount of tea leaves fed into the steamer 2 is reduced by suppressing the rotation speed of the motor 3 by an amount corresponding to 67% or 94.4%.

Table 2 (-1 Beyanguru-' Figure 2 shows the measuring device) 5 and the cooling device 1
7, and FIG.
The present invention can be applied to two steam machines, ie, the rotary shell steam machine 22b and the rotary shell steam machine 22b, and the present invention can also be applied to such machines.

(9 forces) As described above, according to the present invention, the required discharge time is measured until a preset weight of tea leaves or steamer is discharged,
Since the amount of green tea leaves fed to the steamer is controlled according to the rate of delay or advance of this time, the weight of tea leaves in the steamer is always kept constant, allowing the steamer to perform uniform steaming operations. Not only is it possible to do this, but the conveyor with a measuring device installed on the discharge side of the steamer always supplies a constant amount of steamed tea leaves to the coarse rolling machine and leaf crusher that follow.
It is possible to significantly improve the quality of tea while appropriately controlling a series of tea manufacturing processes.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an apparatus showing one embodiment of the present invention, and FIG.
The figure is a block diagram of an apparatus showing another embodiment of the present invention, and FIG. 3 is a side view showing a state in which the conveyor is applied to two steam machines. 1... Conhair 2... Steam machine 3... Motor 4... Motor speed control circuit 5... Measuring device 6... Conveyor 8... Timing circuit 1
0...Arithmetic circuit 11...Setting circuit Applicant: Toyo Denso Kogyo Co., Ltd. Patent attorney Keiji Nishikawa Figure 1 Figure 2 Senshu Neho Seisho (self-proposal) January 1988 24th Japan Patent Office Commissioner Michibu Uga1, Indication of the case, 1985 Patent Application No. 2871402, Name of the invention, Constant supply control device for green tea leaves3, Person making the amendment Relationship with the case Patent applicant Shizuoka Prefecture 325 Shimoe-cho, Hamamatsu-shi Toyodenso Kogyo Co., Ltd. Representative Mikio Fujii 4, Agent Address: 112 Den03 (
815) 6100 2-1-2 Koishikawa, Bunkyo-ku, Tokyo, Detailed description of the invention and drawing 6, content of amendments (1) "Previously" on page 2, line 13 of the specification was changed to "still". ” he corrected. (2) "Cooler 7" on page 4, line 2 and page 5, line 12 of the same book is corrected to "net type cooler 7." (3) In the same M, page 4, line 20 to page 5, line 1, change ``to average...'' to ``to average or end twice.'' The processing operation has been set in advance to average the three measurements from the beginning of the next measurement cycle to the beginning of the next measurement cycle.'' (4) Amend Figures 1 and 2 of the drawings as shown in the attached sheet.

Claims (1)

[Claims] A controllable tea leaf supply means disposed on the supply side of the steamer, a tea leaf conveying means disposed on the discharge side of the steamer and equipped with a weighing means, and a tea leaf conveying means disposed on the discharge side of the steamer until the tea leaves discharged from the steamer reach a set weight. Quantitative supply of fresh tea leaves, comprising: a timer for measuring the required discharge time; and a control means for comparing the required discharge time measured by the timer with a set time and controlling the supply amount of the tea leaf supply means based on the ratio. Control device.