JP2754048B2 - Article supply device in combination scale - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an article supply apparatus for appropriately supplying articles to a plurality of weighing tanks provided in a combination scale.

[Conventional technology]

62-36097
The one described in Japanese Patent Application Laid-Open Publication No. H10-260, 1993 is known. This is achieved by arranging one dispersion table having a conical top surface in the center, and
Driven by two electromagnetic vibrators, the articles supplied from above at the center of the table are dispersed toward the periphery, and a plurality of supply troughs are radially arranged following the periphery of the table, and each supply trough is Supplies the goods. Each of the supply troughs uses a vibrating linear feeder and operates for a certain period of time to send out a substantially fixed amount of articles. In the combination scale, a supply tank is provided following each of the supply troughs, and a weighing tank is provided following each of the supply tubs, and a collecting part for collecting articles discharged from the weighing tank is provided. In some cases, the supply tank may be omitted.

In combination balances, some of the total weighing tanks containing the articles are emptied by discharging the articles for each single metering, and the articles are emptied from the supply tank or the supply trough to the empty weighing tanks. It is being supplied. The amount of articles put into the measuring tank is regulated by the set time during which the supply trough operates. For this reason, it is necessary that the articles are supplied to the supply trough without interruption, and for this purpose, conventionally, the layer thickness of the articles on the dispersing table is detected and the amount of the articles supplied to the table is controlled. That is being done.

[Problems to be solved by the invention]

In the conventional combination scale, when the articles to be weighed are bulky and large, for example, even if a constant vibration signal is given to each supply trough and the apparatus is operated for a fixed time, the supply amount at each time greatly fluctuates. The ratio between the maximum and the minimum may be as much as five times. In addition, there may be a bias between a large supply amount and a small supply amount for each supply trough. In such a case, the combination weighing accuracy decreases. The reason why the supply amount from the supply trough varies or deviates is that the distribution table arranged at the center may not perform the function of uniformly distributing and supplying articles to the supply trough. For this reason, the accumulation amount of articles at the base of the supply trough differs for each supply trough, and a difference occurs in the supply amount of each supply trough.

To ensure that the distribution table performs the function of evenly supplying articles to each supply trough, the center of the flow of articles supplied to the distribution table should be precisely aligned with the center of the distribution table. Good. However, this is actually difficult, and even if dispersed supply can be performed successfully under certain operating conditions, changing the operating conditions such as the amount of supply at one time and the number of times of supply per minute changes the supply state to each supply trough. However, there is a problem that the distribution is not uniform and causes a bias.

An object of the present invention is to supply articles to the supply trough of the article supply device in a combination scale evenly. Further, in combination scales, it may be desirable to have the desired layer thickness of the articles on the first supply trough individually or in groups. The second object of the present invention is to make it possible to cope with the case where the layer thickness is made uniform as described above.

[Means for solving the problem]

According to a first aspect of the present invention, a first supply trough configured to receive an article at a base end and deliver the article from a distal end, a supply tank provided to receive supply of the article from the first supply trough, and A plurality of sets each including a measuring tank provided to receive supply or a set including the first supply trough and a measuring tank provided to receive supply of articles from the first supply trough; In a combination scale in which the base ends of one supply trough are located close to each other on one circumference and the front end is located outside the circumference, the article receiving part is located at the center of the circumference. A dispersing chute, which is located above the dispensing portion and which is arranged so as to rotate around a vertical axis passing through the center of the circumference, wherein the article delivery portion has reached the circumferential position; Provided in each first supply trough A sensor for detecting a stagnant state, a second supply trough provided with a drive unit for controlling the drive unit to increase or decrease the supply amount of the articles and to supply the articles to the dispersion chute; Based on a comparison between the result of the detection and the set value of the control unit, the amount of the articles to be supplied to the corresponding first supply trough is increased or decreased so that the layer thickness of the articles in each first supply trough is kept constant. And a controller for controlling the driving unit of the trough.

According to a third aspect of the present invention, a value corresponding to the layer thickness of the article in the first supply trough is individually or grouped in groups, in addition to the configuration of the other parts except the control unit of the means of the first aspect. A signal generator that can be set arbitrarily and generates a plurality of setting signals according to the set values; a circuit switcher that switches the setting signal according to the rotation angle of the dispersion chute; And a control unit that controls the driving unit of the second supply trough so that the layer thickness of the articles in the first supply trough for each individual or group is made closer to the set value by comparing the detection signal from the sensor and the detection signal from the sensor. It is characterized by having.

A second invention is characterized in that the control section of the means of the first invention has a delay output generation circuit for the control signal.

[Action]

According to a first aspect of the present invention, the dispersion chute is swirled so that
Since the configuration is such that the articles are sequentially supplied to the supply trough, each of the first supply troughs is in a state where the articles are sequentially supplied from the dispersion chute. That is, the article delivery sections of the dispersion chute pass one after another at positions corresponding to the base end of each first supply trough. Thus, even if the center of the conventional distribution table and the center of the flow of the supply material do not coincide with each other,
The opportunity to supply the articles to each first supply trough becomes equal.

Then, since the state in which the articles are accumulated in each of the first supply troughs is detected and the amount of the articles supplied to the corresponding first supply trough via the dispersion chute is regulated by the supply amount of the second supply trough, An appropriate amount of articles is supplied for each first supply trough according to the remaining article quantity of each first supply trough,
Control is performed so that the layer thickness of the articles in the supply trough is constant.

According to a third aspect of the invention, the layer thickness of the articles in the first supply trough is set as a desired value in the signal generator in advance individually or in each group.
The layer thickness of the articles in the supply trough is controlled individually or in groups to approach the desired value.

According to a second aspect of the present invention, the timing at which a control signal for controlling the amount of articles supplied from the second supply trough is output is changed. This is because when the rotation speed of the dispersion chute is changed, if only the rotation speed is changed,
The timing at which the controlled amount of articles is supplied from the dispersion chute to the corresponding first supply trough based on the detection of the accumulation state of the articles in the supply trough does not match. This is made possible by changing the timing.

〔Example〕

The first embodiment will be described with reference to FIG. 1 and FIG. In the figure, 1 is a first supply trough, 2 is a supply tank, 3 is a measuring tank, 4 is a collecting chute, these are the same as those in the conventional combination scale, and are dispersion chute 5 instead of the conventional dispersion table. Is significantly different from the conventional one.

In this embodiment, ten first supply troughs 1 are provided, each of which has a vibrator 9, and the articles supplied to the base end are sent out from the distal end by the operation of the vibrator 9. The first supply trough 1 is provided such that the base ends are located close to each other at a constant pitch along one circumference, and the front ends extend radially outward from the circumference. I have. The adjacent base ends are provided so as to overlap with a gap therebetween, and do not interfere with each other.

The supply tanks 2 are respectively provided below the distal ends of the first supply troughs 1, each having a gate at the bottom, and opening the gate to lower the articles supplied from the first supply trough 1. Can be discharged to

The measuring tanks 3 are respectively provided below the respective supply tanks 2, each of them has a gate at the bottom and is supported via a weighing unit 3 a, and is opened from the supply tank 2 by opening the gate. The supplied articles can be discharged downward. The weighing unit 3a can detect the weight of the article in the measuring tank 3.

The collecting chute 4 is provided so that the articles discharged from the ten measuring tanks 3 according to the combination are put together.

The dispersing chute 5 moves along the article receiving portion 5a provided with the funnel 10 that is opened so as to expand upward, the sliding surface 5b that is inclined downward to one side following the receiving portion 5a, and the sliding surface 5b. The receiving portion 5a is formed with a flange-like edge 11 that expands outward, and the vertical axis 12 coincides with the vertical axis passing through the center of the receiving portion 5a.
The vertical shaft 12 is connected to a motor 13 with a speed reducer and is supported on a box-shaped base 14. By the rotation of the motor 13, the dispersion chute 5 rotates at a constant speed about the vertical axis 12 in the direction indicated by the arrow 5d in FIG. The dispersion chute 5 is provided in a positional relationship where the vertical axis line coincident with the vertical axis 12 and the center of the circumference where the base end of the first supply trough 1 is located. The feed portion 5c of the dispersion chute 5 has reached the base end of the first supply trough 1 and is sequentially moved on the base end of each first supply trough 1 by the turning. In the figure, reference numeral 15 denotes an annular metal fitting which is provided so as to concentrically surround the outside of the turning range of the dispersion chute 5 at intervals, and has a base end portion of each of the first supply troughs 1 annularly below the inside thereof. Are located adjacent to each other,
It has an annular pool section 16. The annular metal fitting 15 is provided so as to be surely supplied to the inside of the pool section 16 so that articles delivered from the delivery section 5c of the dispersion chute 5 do not jump out of the machine, and is fixed to the machine frame body. ing.

A second supply trough 18 is provided to supply articles 17 to be measured to the dispersion chute 5. Second supply trough 18
Has a vibrator 19, and its tip reaches the receiving portion 5a of the dispersion chute 5. The second supply trough 18 is a vibrator 19
, The supply amount of articles can be increased or decreased. This control is performed by the control unit 21. The control unit 21 receives a signal from the sensor 22 for detecting the state of accumulation of articles at the base end of each first supply trough 1 and a signal from the level setting unit 23. Given. One sensor 22 is provided at the edge 11 of the dispersion chute 5, and sequentially detects the accumulation state of articles at the base end of each first supply trough 1, that is, the accumulation level, as the dispersion chute 5 turns. It is going to go. As the sensor 22, for example, a commercially available ultrasonic reflection type or infrared reflection type sensor is used. Sensor
The signal from 22 is transmitted to the control unit 21 via a conducting wire 24, a rotary connection 25 composed of a ring and a brush, and a conducting wire 26. After the sensor 22 detects the accumulation state of the articles at the base end of one of the first supply troughs 1, an amount of articles corresponding to the state is sent out from the second supply trough 18 and passes through the dispersion chute 5 to the first supply trough 5. Since it takes a certain period of time to reach the base end of the supply trough 1, the rotation position of the delivery unit 5 c of the dispersion chute 5 is shifted by an angle θ in the rotation direction of the dispersion chute 5 so as to be detected earlier by the fixed time. The sensor 22 is positioned and fixed at the displaced position. An arc-shaped long hole 27 for attaching a sensor is provided along the edge 11 so that the angle θ can be adjusted, and the position of the sensor 22 is moved along the long hole 27 according to a change in the turning speed of the dispersion chute 5. Change and adjust.

In the article supply device of the combination scale configured as described above, the articles 17 supplied to the second supply trough 18 are supplied to the dispersion chute 5 and are dispersed and supplied from the dispersion chute 5 to the first supply troughs 1. 1 From the supply trough 1, it is supplied to the corresponding supply tank 2 and then to the measuring tank 3. The articles supplied to the respective weighing tanks 3 are weighed, and when a combination value matching a desired weight value is obtained by a combination of the respective weighing values, the weighing tank 3 containing the articles included in the combination values is measured. Each discharges an article to the collecting chute 4. The articles put together by the collecting chute 4 are quantitatively weighed.

Articles are supplied from the corresponding supply tanks 2 to the respective measuring tanks 3 emptied by the discharge, and the first corresponding tanks are emptied by the supply.
Articles are supplied from the supply trough 1. The first supply trough 1 performs an independent supply operation by operating each of the vibrators 9 for a certain period of time.
Since the whole articles on the supply trough are transported to the distal end side and those that fall off the distal end fall and enter the corresponding supply tank 2, the first supply trough 1 that has been supplied operates, the articles are supplied from the base. Decreasing. When the articles are supplied to the empty measuring tank 3, combination weighing is performed, and this is repeated.

The supply of articles to the first supply trough 1 is performed as follows. Assuming that the articles are uniformly supplied to each of the first supply troughs 1 at the stage where the articles are supplied to each of the weighing vessels 3 after the operation is started, some of the weighing vessels 3 are discharged at the next step. It operates and becomes empty, and the supply operation is performed subsequently, and this operation is repeated to reduce the number of articles at the base of the first supply trough 1, and this decreasing state is different for each first supply trough 1. . The dispersion chute 5 is always rotating at a constant speed, and the sensor 22 is also rotating so that the first supply trough 1 is rotated.
Of the article at that position is detected. Now, if the n-th (1n) of the ten first supply troughs 1 is detected, the signal is sent to the control unit 21 and the standard layer thickness of the article set in the setting unit 23 is determined. As a result, a drive signal corresponding to the degree of reduction of the articles is given to the vibrator 19 of the second supply trough 18, whereby the second supply trough 18 supplies the articles to the dispersion chute 5, and the articles slide. From the delivery section 5c through the surface 5b, it reaches the base end of the first supply trough 1n. After the detection by the sensor 22, the article is transferred from the second supply trough 18 to the first
Since the time difference until reaching the supply trough 1 is adjusted by the changeable angle θ between the direction of the delivery portion 5c of the dispersion chute 5 and the mounting position of the sensor 22 with respect to the center of the turn, the sensor 22 detects Articles sent from the second supply trough 18 are supplied to the base of the first supply trough 1n in accordance with the degree of decrease in the number of articles in the n-th first supply trough 1n. Therefore,
The sensor 22 sequentially detects the depletion state of the articles in all the first supply troughs 1 and the articles are sequentially sent out from the second supply trough 18 based on this detection, so that each first supply trough 1 has decreased. An amount substantially corresponding to the article is appropriately replenished and supplied. This allows each first supply trough 1
The articles are always present in a uniform state in a portion on the distal end side from the base of the first supply trough 1 and the supply hopper 2
The supply amount of the articles supplied each time is highly uniform. The turning speed of the dispersing chute 5 was not described, but the dispensing chute 5 was rotated once for one or two combined weighing operations. Pool part 16
In this case, the articles may be accumulated in the first supply trough 1 in a uniform manner as much as possible.

A second embodiment will be described with reference to FIG. This embodiment is different from the first embodiment only in the configuration of the control unit. The control unit 21a is shown in FIG. 3, and the other parts are shown in FIGS.
Refer to the figure.

The control unit 21a includes a level sensor 22 as shown in FIG.
From the second supply trough 18 as an input signal.
A drive signal is output to the vibrator 19 of. The signal from the level sensor 22 enters the low-pass filter 30. The low-pass filter 30 is connected to a comparison circuit 31 to which an external level setting device 23 is connected, and the deviation signal enters a first sample-and-hold circuit 32, and further enters an gain coefficient unit 34 via an A / D converter 33. .
The gain coefficient unit 34 can set its gain by a gain coefficient setting unit 35. The output of the gain coefficient unit 34 enters the delay unit 36. The delay device 36 is composed of n cascade-connected delay elements 36 ₁ , 36 ₂ ,..., 36 _n , for example, shift registers, and has an input terminal of the delay device 36, a mutual connection point of each delay element, have a total of n + 1 output lines of the output end of the delay element 36 _n, each of the input terminals 37 ₀ from the 0th output line delayed input switcher 37 to the n-th, 37 _1, ... 37
_n are sequentially connected. The output of the switch 37 is connected to a second sample and hold circuit 38, and is further output through a D / A converter 39 and an output amplifier 40.

The control unit 21a configured as described above includes a level sensor 22
The signal proportional to the layer thickness of the article from the low-pass filter 30
Filter unnecessary high-frequency components and compare the layer thickness signal with the comparison circuit
Enter 31. The signal is compared with a signal of the level setter 23 which is appropriately determined and set as a layer thickness in advance, and a deviation signal thereof is inputted to the first sample and hold circuit 32. Now, when the signal of the layer thickness detected by the level sensor 22 is small, since the signal of the setting device 23 is larger, the deviation signal of the comparison circuit 31 is positive, and the first sample hold circuit 32 outputs a positive analog signal. Input and temporarily stored. The stored signal is converted to an A / D converter 3
3 is a digital value. First sample and hold circuit 32
In synchronization with the A / D converter 33, the analog deviation signal is sampled every 0.05 seconds to obtain a discrete time series signal. The discrete time-sequenced deviation signal is input to an n-stage delay element, and the delay element is sequentially fed from the left to the right in the figure every 0.05 seconds. If the delay input switch 37 is previously switched to the k-th position, 0.05 × k
After a lapse of time, the output is input to the second sample and hold circuit 38, and this digital value is converted into an analog signal by the D / A converter 39 and output from the output amplifier 40. This output is provided to the shaker 19 of the second supply trough 18 to operate the shaker 19.

In response to the increase or decrease command from the control unit 21a,
The second supply trough 18 is configured such that the amplitude of the vibration of the second supply trough 18 increases and the supply amount increases, or the amplitude decreases and the supply amount decreases. During use, during the time L from when the article is delivered from the second supply trough 18 to reach the pool section 16 via the dispersion chute 5, the rotation angle θ of the dispersion chute 5 at the maximum number of rotations is determined. Level sensor beforehand so that it becomes equal to the angle θ
The mounting phase angle θ of 22 is adjusted. Thus, when using the rotation speed of the dispersion chute 5 as the maximum rotation speed,
Used as the switching position for connecting the delayed input switching unit 37 to the input terminal 37 _0. In this case, the signal does not pass through the delay element. Thereafter, when the dispersion chute 5 is used with a reduced rotation speed, the time T required to rotate by the angle θ at the rotation speed is calculated, and (TL) /0.05 is calculated to be close to this value. The delay input switch 37 is switched to a switching position connected to the switching terminal of the number (o to n). As a result, the time difference caused by the decrease in the number of rotations of the dispersion chute 15, that is, the time difference corresponding to the earlier supply of articles to the corresponding first trough 1 can be corrected, and the first supply trough detected by the sensor 22 can be corrected. The articles delivered from the second supply trough 18 can be reliably supplied under control based on the detection signal.

The feature of the second embodiment is that when it is necessary to change the rotation speed of the dispersion chute 5, the dispersion chute 5 is not stopped to change the mounting position (angle θ) of the sensor 22. Also, by operating the delay input device 37 of the control unit 21a, the supply time of the article corresponding to the rotation speed of the dispersion chute 5, that is, the first supply trough 1 detected by the sensor 22 is controlled based on the detection. Quantity of goods in the second supply trough
The point is that the supply time for accurate supply without delay from 18 can be set.

A third embodiment will be described with reference to FIGS. This embodiment differs from the first embodiment in that a first supply trough 41 is provided.
Are spiraled, not radially, with respect to the vertical line O, which is the center of rotation of the dispersion chute 5, and the side wall 42 of the first supply trough 41 has the center r of the corresponding supply tank 2 and the vertical line Both the point provided at an angle α with respect to the straight line rO connecting O and the direction of the side wall 42 forming the angle α at a position where the respective vibrators 43 of the first supply trough 41 are biased. Different angles β
It is the point that is installed in. The other points are the same as those of the first embodiment, and the same parts are denoted by the same reference numerals and the description thereof will be omitted.

In the article supply device of the third embodiment, when an article is supplied to the supply tank 2 by the first supply trough 41, the vibrator 43
Since the direction of article transfer due to the vibration direction is the direction of arrow 44 shown in FIG. 5, after reaching the side wall 42 of the first supply trough 41, the article is transferred along the side wall 42, so that the article is rod-shaped or In the case of a rectangular shape, they are aligned in the direction along the side wall. Obtaining this aligned state is excellent in that the articles on each first supply trough 41 tend to be even. In addition, since the first supply trough 41 is formed in a spiral shape, the pool 16a of articles can be widened without increasing the outer diameter of the entire combination scale as compared with the first embodiment, and the accumulation amount of articles can be increased. It also has the advantage that it can be done.

The fourth embodiment will be described with reference to FIGS. 7 to 9. This embodiment has the same configuration as that of the first embodiment except for the portion relating to the dispersion chute 5 shown in FIG.

The purpose of this embodiment is to enable a combination scale with a large number of measuring tanks 3, supply tanks 2, first supply troughs 1 in the combination scale to supply a small or a large amount of a specific measuring tank. That is. For example, when the combination target weight value of the former is small and the combination target weight value of the latter is large in a case where one combination weighing is performed by half of all the weighing tanks and another combination weighing is performed by the other half. Is to be able to use it.

Hereinafter, portions different from the first embodiment will be described. Seventh
As shown in the figure, a circuit switch 23b is provided on the vertical axis 12 of the dispersion chute 5 in addition to the one shown in FIG.
The circuit switch 23b is configured to switch a plurality of circuits according to the rotation angle of the dispersion chute 5. As shown in FIG. 8, a slip ring 231 is provided on the shaft 12, and the slip ring 231 is always in contact with the slip ring 231. A brush 232 is provided so as to be connected to the drawing circuit b. Further, a switching contact c is attached to the shaft 12, and the switching contact c is connected to the slip ring 231. M segments S ₁ , S ₂ ,... On a circle drawn by the switching contact c by the rotation of the shaft 12.
... S _m are arranged fixedly to the annular, distal end segments S ₁ of the switching contact piece c, S _2, and is configured to contact one of ...... S _m.

Although not shown in FIG. 7, a separate signal generator 23a is provided as shown in the circuit diagram of FIG. The signal generator 23a can be arbitrarily set in correspondence with the m first supply troughs, and can generate _m setting signals er ₁ , er ₂ ,. Are connected to the m segments S ₁ , S ₂ ,..., S _m of the circuit switch 23b. The signal generator 23a and the circuit switch 23b are associated with the sensor 22 as follows. That is, when the sensor 22 is at the angle for detecting the base of the first supply trough 1, the switching contact c is set to the position to close the circuit of the _first segment S ₁ , and the dispersion chute 5 rotates to detect the sensor. The circuit of the _second segment S2 is similarly adjusted so that the circuit of the _second segment S2 is closed when the position 22 rotates to the position corresponding to the base of the second first supply trough 1. This setting signal _{er 1, er 2, ...... er} m
Serve as layer thickness setting signals for each of the first supply troughs. That is, the signal from the signal extraction terminal b is used in place of the signal of the level setting unit 23 in FIG.

Only er ₁ to Er ₅ for the layer thickness of the first feed trough 1 When constituted in this way for example 1-5 No. increase relative to the first feed trough 1 1-5 No. is set to a large value second The control for increasing the supply amount of the supply trough 18 works to increase the layer thickness for the first to first supply troughs 1 to 5. That is, it is possible to control the layer thickness of each first supply trough 1 in advance to a desired layer thickness.

In the fourth embodiment, each first supply trough 1 is divided into groups, and the signal generator 23a generates individual setting signals for each group. The number of segments of the circuit switch 23b is also reduced to the number of groups. If the setting signal is switched in accordance with the distribution angle for each group, the number of signal terminals of the signal generator 23a and the number of switching circuits of the circuit switch 23b can be reduced.

〔The invention's effect〕

According to the first aspect of the present invention, by providing the swirling distributed supply chute, the chances of supplying articles to each first supply trough are equalized, and the state of accumulation of articles in each first supply trough is reduced. Since the amount of articles detected and supplied to the corresponding first supply trough via the dispersing chute can be regulated by the supply amount of the second supply trough, it is appropriate according to the remaining article quantity of each first supply trough. An appropriate amount of articles can be supplied for each first supply trough, and the quantity of articles on each first supply trough can be equalized. Since there is a method in which a single sensor performs sweep detection for all the first supply troughs, there is an advantage that a large amount of information can be obtained with a small number of sensors, and since the sensor is rotated together with the dispersion chute, another rotating unit is used. Therefore, the sensor and its supporting structure are very simple and cost-effective.

According to the third aspect, the layer thickness of the articles in each first supply trough is set to be closer to a desired value for each first supply trough or for each first supply trough by grouping the first supply trough. In the case where two or more kinds of quantifications are performed in parallel using one combination scale, it is possible to appropriately cope with the supply of articles to each supply tank or each measurement tank.

According to the second invention, it is possible to match the inconsistency of the article supply timing to the first supply trough due to the change in the rotation speed of the dispersion chute by a simple operation of the control unit without adjusting the position of the sensor. Become.

Since the present invention enables control of the amount of articles on each first supply trough, the first
The amounts of articles supplied from the supply trough to the corresponding supply tanks or weighing tanks are respectively equalized, and the weighing accuracy of the combination scale can be improved.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional front view showing a schematic configuration of a first embodiment of the present invention, FIG. 2 is a partially omitted plan view corresponding to FIG. 1, and FIG. 3 is a second embodiment of the present invention. 2 supply troughs 18
FIG. 4 is a block diagram showing a configuration of a control unit 21a for controlling the vibrator 19, FIG. 4 is a partially longitudinal front view showing a schematic configuration of a third embodiment of the present invention, and FIG. 5 corresponds to FIG. FIG. 6 is a partial side view corresponding to FIG. 4, FIG. 7 is a schematic vertical sectional front view of a dispersion chute according to a fourth embodiment of the present invention, and FIG. 8 is a circuit of the same embodiment. FIG. 9 is a perspective view showing a schematic configuration of a switch, and FIG. 9 is a circuit diagram of a signal generator and a circuit switch of the embodiment. 1... First supply trough, 2... Supply tank, 3.
4 Collecting chute, 5 Dispersing chute, 12 Vertical shaft, 13 Motor with reduction gear, 16 Pool part, 17 Article, 18 Second supply trough, 19 Excitation Vessels, 21, 21a ...
... Control part, 22 ... Sensor, 23 ... Setting device, 23a ... Signal generator, 23b ... Circuit switcher, 41 ... First supply trough, 4
2 ... side wall, 43 ... shaker.

Claims (3)

(57) [Claims] 1. A first supply trough configured to receive an article at a base end and send it out from a distal end, a supply tank provided to receive supply of the article from the first supply trough, and supply of the article from the supply tank. And a plurality of sets each including a first supply trough and a measurement tank provided to receive the supply of articles from the first supply trough. In a combination scale in which the base ends of the supply trough are located close to each other on one circumference and the front end is located outside the circumference, the article receiving part is located at the center of the circumference. A dispersing chute, which is located above and is provided so as to pivot about a vertical axis passing through the center of the circumference, wherein the article delivery unit has reached the circumferential position, and Goods provided in each first supply trough A sensor for detecting a stacking state, a second supply trough provided with a driving unit, which is capable of increasing or decreasing the supply amount of articles by controlling the driving unit, and supplying the articles to the dispersion chute; Based on the comparison between the detection result and the set value of the control unit, the amount of the articles to be supplied to the corresponding first supply trough is increased or decreased so that the layer thickness of the articles in each first supply trough is made constant. And a control unit for controlling the driving unit. 2. The apparatus according to claim 1, wherein
An article supply device in a combination scale, wherein a control unit that controls a drive unit of the supply trough includes a delay output generation circuit for the control signal. 3. A first supply trough configured to receive an article at a base end and send it out from a distal end, a supply tank provided to receive supply of the article from the first supply trough, and supply of the article from the supply tank. And a plurality of sets each including a first supply trough and a measurement tank provided to receive the supply of articles from the first supply trough. In a combination scale in which the base ends of the supply trough are located close to each other on one circumference and the front end is located outside the circumference, the article receiving part is located at the center of the circumference. A dispersing chute, which is located above and is provided so as to pivot about a vertical axis passing through the center of the circumference, wherein the article delivery unit has reached the circumferential position, and Goods provided in each first supply trough A sensor for detecting a stacking state, a second supply trough provided to supply and supply the articles to the dispersing chute, which has a drive section and controls the drive section to increase or decrease the supply amount of the articles, and individually or A signal generator configured to arbitrarily set a value corresponding to the layer thickness of the articles in the first supply trough for each group, and to generate a plurality of setting signals in accordance with the set values; A circuit switch configured to switch the setting signal in accordance with the rotation angle of the first supply trough by comparing the setting signal from the circuit switch with the detection signal from the sensor. A control unit for controlling a driving unit of the second supply trough so that the layer thickness approaches the set value.