JPH0253336B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a continuous metering feeding device for feeding powdery material to, for example, a belt conveyor.

[Conventional technology and its problems]

FIG. 6 is a side view of a conventional batch-type quantitative feeding device, in which large hoppers 1 to 4 serving as supply sources store different materials (for example, beans, corn, barley, and rice). Below the discharge ports of these hoppers 1 to 4 is a vibration feeder 5 for cutting.
- 8 are arranged, and measuring hoppers 9 - 12 are arranged below these material discharge ends. The scale mechanism S is shown in a simplified manner, but the weighing hopper 9-1
2 and a vibration feeder 13 disposed at this discharge port.
~16 total weights are each weighed.

A first material is cut out from the first hopper 1 by a vibrating feeder 5 and supplied to a first weighing hopper 9. The weight of this material is measured by the weighing mechanism S, and when a predetermined amount has been supplied, the driving of the vibrating feeder 5 is stopped. Next, the lower vibrating feeder 13 is driven, and the material in the hopper 9 is discharged onto the belt conveyor 18.

Similarly, the second, third and fourth materials are transferred from the other hoppers 2 to 4 to the lower measuring hoppers 10 to 1.
2 in predetermined amounts and discharged onto the belt conveyor 18.

Each material is transferred from the belt conveyor 18 to the mixer 17
However, the mixer 17 is activated after all the materials have been supplied. The mixers 17 are the first to fourth mixers.
This driving force must be quite large since each batch of material is involved. After mixing for a predetermined period of time, the mixed materials are discharged from the mixer in batches.

FIG. 7 is a side view of a conventional continuous quantitative feeding device, and parts corresponding to those in FIG. 6 are given the same reference numerals.

In this conventional example, intermediate hoppers 21 to 24 are disposed below large hoppers 1 to 4;
From there, each material is constantly fed onto belt scales 29-32 by vibrating feeders 25-28. The belt scales 29 to 32 weigh the belt driven at a constant speed together with the material on it, and the outputs of the load cells 33 to 36 as weight detection means are sent to the controller 3.
The driving force of the vibrating feeders 25 to 28 is adjusted so as to be compared with the set value of 7 to 40 and always match the set value. Therefore, each predetermined weight/unit time of material is always supplied onto the belt conveyor 18 from the belt scales 29 to 32. The layer thickness of each material on the belt conveyor 18 is sufficiently smaller than that of the conventional example shown in FIG. 6, and is approximately proportional to each predetermined weight. Each material is continuously supplied to the mixer 41 at a rate of each predetermined weight/unit time. mixer 41
is continuously driven, and the mixed material is continuously discharged from its discharge port through a predetermined process.

In the case of this conventional example, each material is transferred on the belt conveyor 18 in a thin layer overlapping state and with a layer thickness of a predetermined weight/unit time ratio, so that when it is fed into the mixer 41, It is already mixed to a fairly uniform degree. Moreover, since the mixed material is continuously discharged from the mixer 41,
The driving force of the mixer 41 is much smaller than that of the conventional example shown in FIG. Further, the mixer 41 can be downsized.

However, the continuous metering device shown in FIG. 7 has the following drawbacks.

That is, from large hoppers 1 to 4 to intermediate hopper 21
For this purpose, for example, level detectors are provided in the intermediate hoppers 21 to 24, and when the material decreases to a first predetermined level, the materials are quickly fed to the vibrating feeders 5 to 8. Materials are cut out from hoppers 1 to 4. When the second predetermined level is reached, the vibrating feeders 5 to 8 are stopped. However, large hops 1-4
In general, materials tend to become clogged (bridging phenomenon),
The intermediate hoppers 21 to 24 may become empty at this time. In such a case, the driving force of all the belt scales 29 to 32 must be stopped, and the clogging must be cleared by, for example, driving vibrators provided in the large hoppers 1 to 4.

In addition, you may want to know the total discharge amount (i.e. processing amount) of each material from each large hopper 1 to 4.
In this case, it is estimated by multiplying the operating time by the predetermined weight/unit time specified in each of the controllers 37 to 40. However, the belt scale is 29-3
It suffices if the amount of material discharged from 2 (weight) is always constant, but generally it fluctuates greatly up and down. Therefore,
The values obtained by the above estimation are unreliable. In particular, the error becomes large when, for example, a clogging of material occurs in one of the large hoppers 1 to 4 during operation and all belt scales 29 to 32 are temporarily stopped.

Furthermore, the belt scales 29 to 32 have a complicated structure, making maintenance and inspection troublesome, leading to high costs.

[Problem that the invention seeks to solve]

The present invention has been made in view of the above-mentioned problems, and provides a continuous quantitative feeding device that can accurately know the total amount of material discharged or the amount of material to be processed from a large hopper as a material supply source, and can significantly reduce costs compared to conventional methods. The purpose is to provide.

[Means for solving problems]

According to the first aspect of the present invention, the above object is achieved by: a batch weighing hopper having a material discharge means; a first weighing means for weighing the total weight of the batch weighing hopper; a quantitative supply hopper equipped with an adjustable discharger, a second weighing means for weighing the total weight of the quantitative supply hopper, and configured to receive the output of the second weighing means and discharge the fixed quantity. and a control circuit for controlling the discharger, which supplies one batch of material from a material supply source to the batch weighing hopper, weighs the material with the first weighing means, and stores the result. Then, when the remaining amount of material in the quantitative supply hopper decreases and reaches a predetermined value, the material discharge means is driven to empty the material supplied to the batch metering hopper. When the remaining amount of the material in the metering hopper decreases and reaches the predetermined value again, the material for one batch is again supplied from the material supply source to the batch metering hopper. , the material is weighed by the first weighing means, and when the weighed value does not reach a predetermined weight of the material for one batch even after a predetermined time has elapsed, the material supply source is materially clogged. to judge that it has occurred,
This is achieved by a continuous quantitative feeding device characterized in that the discharger is always driven.

Further, according to the second aspect of the present invention, a plurality of batch weighing hoppers each having a material discharge means, a first weighing means for weighing the total weight of the plurality of batch weighing hoppers, A quantitative supply hopper, which is disposed corresponding to each of the plurality of batch weighing hoppers, and is equipped with a discharging machine capable of adjusting the discharge amount, and a quantitative supply hopper for weighing the total weight of each of these quantitative supply hoppers. It comprises a second weighing means, and a control circuit that receives the respective outputs of the second weighing means and controls the discharge machine so as to discharge each quantity of material, and the material is placed in one of the batch weighing hoppers. The material for one batch is supplied from the supply source in a predetermined order, the material is weighed by the first weighing means, and this result is stored, so that the remaining amount of material in the quantitative supply hopper is reduced. When a predetermined value is reached, the material discharging means is driven to discharge the material supplied to the corresponding batch metering hopper into the quantitative supply hopper to empty it. When the remaining amount of material decreases and before it reaches the predetermined value again, one batch of material is supplied from the material supply source to the batch weighing hopper, and this material is counted by the first weighing means. When the weight value does not reach the predetermined weight of the batch of material corresponding to the batch weighing hopper even after a predetermined time has elapsed, it is determined that a material blockage has occurred in the material supply source. This is achieved by a continuous quantitative feeding device characterized in that the discharger is always driven.

Further, according to the third aspect of the present invention, there is provided a large-capacity storage hopper for storing a material, a first cutting means for cutting out the material from the hopper, and a material cut out from the first cutting means. a small capacity batch hopper for receiving material, a second cutting means for cutting out the material from the batch hopper, a small capacity supply hopper for receiving the material cut from the second cutting means, and a fixed quantity of material from the supply hopper. It consists of a quantitative material discharge device for cutting out the batch hopper, a remaining material amount detection means for detecting the amount of material remaining in the supply hopper, and a weighing means for detecting the total weight of the batch hopper, and the remaining material amount detection means is When it is detected that the amount of material in the supply hopper is below a predetermined amount, the second cutting means is driven to remove all the material that has been previously supplied in the batch hopper in a predetermined batch amount into the supply hopper. After discharging, the driving of the second cutting means is stopped, and the first cutting means is driven to transfer the predetermined batch amount of material from the storage hopper to the batch hopper by the weight detection of the weighing means. At this time, if the predetermined batch amount is not reached even after a predetermined period of time has elapsed, it is determined that material blockage has occurred in the storage hopper, but the quantitative discharge device is always driven. This is achieved by a continuous quantitative feeding device featuring the following characteristics.

The batch weighing hopper is supplied with a batch of material from a storage hopper or material supply. This need not be an exact predetermined weight. On the other hand, the material is discharged from the quantitative supply hopper in a fixed amount by a discharger or a quantitative discharge device. When the remaining amount of material in this hopper reaches a predetermined value, all the material is quickly discharged from the upper batch weighing hopper. Note that during this filling, the amount discharged from the quantitative supply hopper may be kept constant.
For example, when a vibrating feeder is used as a discharger, the vibration width is controlled to be constant.

The batch metering hopper is again supplied with one batch of material. In the first and second inventions, this weighed value is added to the previous weighed value. When the remaining amount of material in the metering hopper decreases and reaches a predetermined value again, the weighed material is filled from the batch metering hopper.

In the first and second aspects of the invention, as described above, the input amount for each batch of the batch weighing hopper is sequentially added and stored, so that the net throughput can be known.

In addition, even if the large hopper serving as a supply source becomes clogged with material, the weighing means of the batch weighing hopper will detect this and take action before the quantitative supply hopper downstream from it becomes empty. Can be done. There is no need to stop material discharge from the quantitative supply hopper. Since not much time has passed since the batch measuring hopper and quantitative supply hopper were filled with material, there is almost no possibility that the material will become clogged. In particular, since the material is constantly discharged from the discharge port of the hopper for quantitative supply, clogging of the hopper for quantitative supply almost never occurs.

In addition, in the first and second inventions, quantitative discharge is performed by detecting the total weight of the quantitative supply hopper and controlling the discharge machine so that the rate of decrease is constant, so it is similar to the conventional belt scale. This simplifies the weighing mechanism and related configurations, and reduces costs.

〔Example〕

1 to 5 for each embodiment of the present invention.
This will be explained with reference to the figures. In addition, in each figure, the 6th
The same reference numerals are given to the parts corresponding to the figures and FIG. 7.

FIG. 1 shows a first embodiment of the present invention, in which batch weighing hoppers 51 to 54 are arranged below large hoppers 1 to 4 as supply sources, respectively. These hoppers 51-54 are equipped with dampers 51a-54a that can be opened and closed at their discharge ports.

The batch weighing hoppers 51 to 54 are all measured by one scale mechanism 55, and the output of a load cell 56 as a weight detection means is supplied to a computer 57. Although various known mechanisms can be applied to the scale mechanism 55, they are shown in a simplified manner to make the diagram easier to understand. The computer 57 contains various programs, an arithmetic circuit, a comparison circuit, a storage circuit, etc., and various predetermined values are set therein. The output terminals of the computer 57 are respectively large hoppers 1~
Drive unit 5 for vibration feeders 5 to 8 for cutting from 4
Connected to a to 8a. The above-mentioned program includes, for example, the driving order of the vibrating feeders 5 to 8, that is, the filling order of the batch weighing hoppers 51 to 54. In addition, various estimated values include each hopper 51~
54 includes the weight of one batch of each material to be added.

Hoppers 58 to 61 for quantitative supply are arranged below the hoppers 51 to 54 for batch weighing, respectively, and a vibrating feeder 74 for cutting is provided below these discharge ports.
~77 are provided. Although not shown, the vibration feeders 74 to 77 are suspended from the quantitative supply hoppers 58 to 61 by vibration isolation springs. Therefore, the total weight of each of the fixed quantity supply hoppers 58 to 61 including the vibrating feeders 74 to 77 is measured by the weighing mechanisms 62 to 6.
It is weighed by 5. The outputs of load cells 66 to 69 as weight detection means are controlled by control circuits 70 to 73.
The two output terminals of these circuits 70-73 are connected to the driving parts of the vibrating feeders 74-77 and the dampers 51a-54a of the upper batch weighing hoppers 51-54, respectively. Control circuit 70
-73, a predetermined material discharge rate (=predetermined weight/unit time) from each hopper 58-61 is set. That is, in this embodiment, the vibration feeders 74 to
77, load cells 66 to 69, control circuits 70, 7
For example, the first control circuit 70 has 100 kg/hour,
In the second control circuit 71, required filling hopper weights W70 to W73 are further set in the control circuits 70 to 73, such as 200 kg/hour. W70～
W73 is the weight when the material in the quantitative supply hoppers 58-61 is reduced to a certain level, and this detection signal causes the dampers 51a-51 of the upper hoppers 51-54 to be activated.
54a is configured to take an open position shown by a solid line.

When the total weight of each of the quantitative supply hoppers 58-61 reaches a predetermined value and the material no longer falls from the upper hoppers 51-54, the dampers 51a-54a assume the closed position again. In this embodiment, the vibrating feeders 74 to 76 are normally driven to cut out material from the hoppers 58 to 61 at respective predetermined material discharge speeds, but when the material is being filled from the upper hoppers 51 to 54 ( (albeit for a very short time),
It is assumed that control circuits 70 to 73 perform switching control to obtain a predetermined amplitude. In other words, it is assumed that the material is cut out in a predetermined capacity/unit time. Although not shown, amplitude detectors are provided in each of the vibrating feeders 74 to 77 for this purpose.

The first embodiment of the present invention is constructed as described above, and its operation will be explained next.

It is now assumed that each damper 51a-54a is closed and all batch weighing hoppers 51-54 are empty. From the lower quantitative supply hoppers 58 to 61, material is cut out to the belt conveyor 18 at a predetermined discharge speed by vibrating feeders 74 to 77, respectively. The materials are transferred in thin layers to the right and are already fairly uniformly mixed when they are discharged from the right end of the belt conveyor 18 into the mixer 41. Inside the mixer 41, the mixed material is continuously discharged after a process of a predetermined time.

First, the vibrating feeder 5 disposed below the first large hopper 1 is driven, and the first material is initially fed into the first batch weighing hopper 51. A common weighing mechanism 55 measures the increase in total weight and thus the filling amount of the first batch weighing hopper 51.

When one batch of the first material is reached, the driving of the vibrating feeder 5 is stopped. Note that one batch does not have to exactly match the predetermined value, and the actual measured amount is stored in the computer 57. The first batch weighing hopper 51 is filled with one batch of material and is on standby.

In the same way, the second, third, and fourth materials are sequentially fed from the second, third, and fourth large hoppers 2, 3, and 4 by the vibrating feeders 6, 7, and 8 into the batch weighing hoppers. 52, 53, and 54 are each filled with one batch of material. In any case, while one batch metering hopper 52, 53, 54 is being filled with material, other batch metering hoppers 52, 53, 54 are not filled. This makes it possible to weigh each batch using the common weighing mechanism 55. Furthermore, since the hoppers 51 to 54 do not need to be filled very frequently, there is no problem with weighing using the common weighing mechanism 55.

The vibration feeders 74 to 74 are arranged so that the total weight reduction rate of each of the quantitative supply hoppers 58 to 61 reaches a predetermined value.
The driving force of 77, that is, the amplitude is controlled by the control circuits 70 to 7.
3, it is now assumed that the material in the first quantitative supply hopper 58 has decreased to a predetermined level. In other words, it is assumed that it is close to the sky. This is detected by the scale mechanism 62 as the total weight reaching a predetermined value. As a result, the damper 51a of the batch weighing hopper 51, which is waiting to be filled with the material above, is opened. A first material is placed into the first quantitative feed hopper 58 . According to this embodiment, while the damper 51a is open, that is, while the material is being filled, the vibration feeder 74 is controlled to have a constant vibration width, and the material is cut onto the belt conveyor 18 at a predetermined volume/unit time.

One batch of material is put into the hopper 58,
When the upper batch weighing hopper 51 is emptied, the damper 51a is closed, and the vibration feeder 74 is again switched to discharge speed control of a predetermined weight/unit time.

As described above, one batch each of the second, third, and fourth materials are sequentially supplied to the quantitative supply hoppers 59, 60, and 61, which are approaching empty, and the upper hoppers 59, 60, and
It will be introduced from 61 onwards. During this feeding, each vibration feeder 75, 76, 77 is switched to constant vibration width control as described above. Of course, it is assumed that even if the control is switched to constant amplitude control, the material is supplied onto the belt conveyor 18 at a supply amount that is almost equal to the discharge speed per predetermined weight/unit time.

The actual filling weight of each batch in the batch weighing hoppers 51 to 54 is stored in the computer 57 and accumulated. That is, the total weight of the material supplied to the quantitative supply hoppers 58 to 61 and therefore to the belt conveyor 18 side is stored for each material.

As described above, each material is supplied to the mixer 41 in a continuous quantity, so it has the advantage of a continuous quantity method like the conventional example shown in FIG.
This embodiment also has the following effects.

That is, in the conventional example shown in FIG. 7, belt scales 29 to 32 having a complicated configuration are used, making maintenance and inspection troublesome, but in this embodiment, a normal scale mechanism can be used. Therefore, maintenance and inspection are easy and costs can be reduced.

Further, the conventional example shown in FIG. 7 is susceptible to clogging of the large hoppers 1 to 4 with materials. Generally large hottupa 1
4. Since a large amount of material is stored for a long time, it is easy to cause bridging, and in such a case, the material is not discharged or only a small amount is discharged. If the material in the lower hoppers 21-24 becomes empty at this time, the entire apparatus must be stopped.

On the other hand, in this embodiment, batch weighing hoppers 51 to
Even if the large hoppers 1 to 4 are clogged with material when the material should be filled into the large hoppers 58 to 54, the quantity supply hoppers 58 to 6
It does not affect the continuous quantitative supply of 1. Before any of these hoppers 58 to 61 become empty, the large hopper 1
It is only necessary to release the clogging phenomenon of the materials in ~4. In other words, large hoppers 1 to 4 and quantitative supply hoppers 58 to 6
Since there is a retention area for one batch of material between large hoppers 1 to 4, there is no need to immediately stop continuous quantitative feeding even if large hoppers 1 to 4 become clogged with material, and there is sufficient time to deal with the blockage. can give. As a means for notifying this, for example, a timer may be provided in the computer 57 to detect that one batch has not been dispensed even after a predetermined period of time has elapsed.

In addition, according to this embodiment, the computer 57 stores and adds up the actual weight of the material for each batch weighed by each batch weighing hopper 51 to 54. It is possible to accurately know the throughput of each material after the equipment is in operation.

On the other hand, in the conventional example shown in Figure 7, in order to know the processing amount, the set discharge speed (Kg/h) by the belt scale is used.
must be multiplied by the operating time. However, the actual discharge speed constantly fluctuates above and below the set discharge speed, and the above does not necessarily result in an accurate total throughput of each material. In particular, if the material becomes clogged in the large hopper during operation and becomes difficult to discharge, or if the material stops discharging, causing the entire belt scale to stop, even temporarily, check the accuracy of each material. It is not possible to know the total amount of processing.

However, according to this embodiment, the intermediate hopper 51
Since materials for each batch are waiting in the hoppers 51 to 54, and they are not waiting for a long time, these hoppers 51 to 54 are rarely clogged with materials, and the hoppers below are Hopper 58 for quantitative supply
~61 are continuously discharged in a fixed amount. If material clogging occurs in the large hoppers 1 to 4 as supply sources, this can be dealt with without stopping the quantitative discharge operation of the quantitative supply hoppers 58 to 61. Operational efficiency can be improved compared to conventional methods.

2 and 3 show a second embodiment of the invention. Corresponding parts in FIG. 1 are designated by the same reference numerals.

The difference between this embodiment and the first embodiment is that in this embodiment, the weighing mechanisms 62 to 65 for weighing the total weight of the four quantitative supply hoppers 58 to 61 are omitted;
By selectively measuring the total weight of any of the four quantitative supply hoppers 58 to 61 at any time using one scale mechanism that weighs the total weight of the four batch weighing hoppers 51 to 54. be.

The common scale mechanism in FIGS. 2 and 3 is indicated as a whole at 80 and consists primarily of a suspension frame 81 and four load cells 82, 82, 8.
It consists of 2.82. Load cell 82, 8
2, 82, 82 are arranged at each corner of the rectangle, and their upper end sides are connected to the horizontal parts 85, 8 of the fixed frame 82.
5, and the lower end side is a suspension frame 81.
is fixed.

Batch weighing hoppers 51 to 54 are fixed to the suspension frame 81 via connecting members 100 and 101, and each quantitative supply hopper 58 to 61 is attached horizontally to the lower side of the fixed frame 83 as shown in FIG. Both side wall portions are pivotally connected at pivot portions 92, 92 of rotating arms 93, 93 which are pivotally connected to fulcrum members 91, 91 provided on the portion 85. That is, each hopper 58~
61 is rotatable around fulcrum members 91, 91, and one end side of the rotating arms 93, 93 is in a non-weighing state by abutting against a stopper 95. The stopper 95 is fixed to the fixed frame 83. Furthermore, the fixed frame 83 is fixed to the ground.

A lower end portion of a switching arm 94 extending vertically is also pivotally attached to one end side of the rotating arms 93, 93, and the upper end portion of this switching arm 94 is fixed to the suspension switching devices 87-90. For example, a screw mechanism or an air cylinder is applied to the suspension switching devices 87 to 90, and when the total weight of any one of the quantitative supply hoppers 58 to 61 is selectively weighed by the common weighing mechanism 80, this hopper is used. Suspension switching devices 87 to 9 corresponding to
0 is driven and pulls the switching arm 94 upward. As a result, the corresponding hopper is pulled upward from the non-weighing position shown in FIG.

A balance weight 90 is fixed to the other end of the rotating arm 93, thereby reducing the driving force of the suspension switching devices 87-90. As shown in FIG. 3, the fixed frame 83 has hopper steady rest members 121 and 123 fixed to its lower side.
One end of the link 122 is pivotally connected to the member 123,
The other end is pivotally connected to hoppers 58-61. This prevents the hoppers 58 to 61 from swinging significantly around the pivot portion 92 of the rotating arm 93 when the hoppers 58 to 61 are pulled up and down.

The output of load cell 82 is supplied to computer 86, which detects the load being applied to scale mechanism 80 at that time. Each output terminal of the computer 86 is connected to the driving parts 5a to 8 of the vibrating feeders 5 to 8 for cutting out the large hoppers 1 to 4 as material supply sources, respectively.
8a, the dampers 51a to 54a of the batch weighing hoppers 51 to 54 are connected to the suspension switching devices 87 to 90 and the driving parts of the vibration feeders 74 to 77 for cutting out the quantitative feeding hoppers 58 to 61.

As in the first embodiment, various predetermined values are set in the computer 86, which includes a cumulative storage circuit for the actual measured weight values for each batch of each batch weighing hopper 51-54, and a cumulative storage circuit for each batch weighing hopper 51-54. In addition to the 54 filling order programs and various arithmetic circuits, the drive order program for the suspension switching devices 87 to 90 is also built in. Batch weighing hopper 5
When 1 to 54 are not filled, one of the suspension switching devices 87 to 90 is selectively driven according to this drive order program, and the corresponding fixed quantity supply hopper 58 is driven.
-61 is weighed, and the driving force of the vibrating feeders 74-77 for cutting out the hopper is adjusted so as to discharge the material at the set discharge speed. Further, when it is detected that the container is almost empty, the dampers 51a to 54a of the upper batch weighing hoppers 51 to 54, which have already been filled with one batch of material and are on standby, are opened.

The suspension switching devices 87 to 90 selectively load one of the total weights of the quantitative supply hoppers 58 to 61 onto the common weighing mechanism 80, but the operation is substantially the same as in the first embodiment, and the effect is achieved. However, this embodiment also provides the following effects.

That is, the weighing scale mechanisms 62 to 65 for each quantitative supply hopper 58 to 61 are omitted, and only the common scale mechanism 80 is used, so that costs can be further reduced. Note that the quantitative feeding performance of each quantitative feeding hopper 58 to 61 does not change significantly in a short period of time even if it is not detected continuously, and a sufficiently accurate mixing ratio of materials can be obtained by detecting it every predetermined time. be able to. Furthermore, when not weighing, the vibration feeders 74 to 77 may be subjected to constant vibration width control.

4 and 5 show a third embodiment of the present invention, and parts corresponding to those in the above embodiment are given the same reference numerals.

In other words, according to this embodiment, the total weight of the batch weighing hoppers 51 to 54 is stored in one scale mechanism 110.
(same as in the first embodiment), and the total weight of each of the quantitative supply hoppers 58 to 61 is weighed selectively by another weighing mechanism 112 by the suspension switching devices 87 to 90. . Therefore, although the number of weighing mechanisms is increased by one compared to the second embodiment, it can be significantly reduced compared to the first embodiment.

Suspension frame 113 in scale mechanism 112
can be compared to the suspension frame 81 of the second embodiment, but in this embodiment, the batch weighing hoppers 51 to 54 are not fixed to the suspension frame 81, and the load cell 114 has a suspension frame 113, The total weight of one of the metering hoppers 58-61 is loaded selectively by the suspension switching devices 87-90. The output of the load cell 114 is supplied to the control circuit 200, and this output terminal is connected to the dampers 51a to 54.
a. Suspension switching devices 87-90 and feeder 74-
77. Note that the control circuit 200 is the device 8
It is assumed that switching order programs 7 to 90 are built-in.

According to this embodiment, the upper batch weighing hopper 5
Regardless of whether 1 to 54 are filling material or not,
The total weight of any one of the quantitative supply hoppers 58 to 61 can be measured at any time. Therefore, the detection frequency for quantitative supply can be improved compared to the second embodiment. Other functions and effects are similar to those of the first embodiment or the second embodiment described above.

Although each embodiment of the present invention has been described above,
Of course, the present invention is not limited to these, and various modifications can be made based on the technical idea of the present invention.

For example, in the above embodiment, the supply source large hopper 1~
4 is four, and correspondingly there are hoppers 51 to 54 for batch weighing and hoppers 58 to 6 for fixed quantity supply.
1 is also set to four, but the number is not limited to this. Furthermore, in the above embodiment, each material is always discharged from all of the quantitative supply hoppers 58 to 61 to mix four types of materials, but some of these materials are not supplied for a predetermined period of time. You can program it like this.

Further, in the above embodiments, a vibration feeder was used as a means for cutting out material from the large hoppers 1 to 4 and a means for cutting out material from the quantitative supply hoppers 58 to 61, but other means, such as a rotary valve, may be used. It's okay.

In addition, in the above embodiment, the batch weighing hopper 51
Although a damper that can be simply opened and closed was used as a means for cutting out the material from 54, other means such as a rotary valve or a vibrating feeder may be used instead.

Further, according to the third aspect of the present invention, in the conventional apparatus shown in FIG.
4, batch weighing hoppers 51 to 54 and a scale mechanism 55 as shown in FIG. 1 may be provided to perform the above-described control.

〔Effect of the invention〕

As described above, according to the continuous quantitative feeding device of the present invention, since a retention area for one batch of material is provided between the large hopper and the quantitative feeding hopper, clogging of the material in the large hopper is avoided. However, there is no need to immediately stop continuous quantitative supply, and sufficient time can be given to deal with material clogging in the large hopper. Therefore, the operating rate of the device increases. Further, as an effect of the continuous type, the driving force of the downstream mixing mixer can be reduced, and the mixer as a whole can be downsized. Furthermore, since batch measurements of each material are carried out and stored cumulatively, the throughput can be known accurately, which is convenient for material management.

[Brief explanation of the drawing]

FIG. 1 is a front view of a continuous quantitative feeding device according to a first embodiment of the present invention, FIG. 2 is a front view of a continuous quantitative feeding device according to a second embodiment of the present invention, FIG. 3 is a side view of the same, and FIG. The figures are a front view of a continuous quantitative feeding device according to a third embodiment of the present invention, FIG. 5 is a side view of the same, FIG. 6 is a front view of a batch-type quantitative feeding device of a conventional example, and FIG. FIG. 3 is a front view of the continuous metering supply device. In the figure, 51 to 54...batch weighing hopper, 56, 82, 114...load cell, 5
8-61...Hopper for quantitative supply, 62-65, 8
0,110,112... Scale mechanism, 74-77
...Vibration feeder, 57,86...Computer, 70,200...Control circuit.

Claims (1)

[Claims] 1. A batch weighing hopper equipped with a material discharge means, a first weighing means for weighing the total weight of the batch weighing hopper, and a discharge machine capable of adjusting the discharge amount. a fixed quantity supply hopper, a second weighing means for weighing the total weight of the fixed quantity supply hopper, and control for controlling the discharge machine to receive the output of the second weighing means and discharge the fixed quantity. The circuit comprises a circuit for supplying one batch of material from a material supply source to the batch weighing hopper, weighing the material by the first weighing means, and storing the result; When the remaining amount of material in the hopper decreases and reaches a predetermined value, the material discharge means is driven to discharge the material supplied to the batch weighing hopper to the quantitative supply hopper to empty it. When the remaining amount of material in the quantitative supply hopper decreases and before it reaches the predetermined value again, one batch of material is supplied from the material supply source to the batch weighing hopper again, and the first weighing means Weighing this material, and when this weight value does not reach a predetermined weight of the material for one batch even after a predetermined time has elapsed, it is determined that a material blockage has occurred in the material supply source, 1. A continuous quantitative feeding device, characterized in that the discharger is always driven. 2. The sequence according to item 1 above, wherein when the weighed value reaches a predetermined weight of the material for one batch within the predetermined time, the weighing result at this time is added to the previous result. Quantitative feeding device. 3. The first weighing means and the second weighing means are common weighing means, and a load switching means is provided between the weighing means and the batch weighing hopper or the quantitative supply hopper. 3. The continuous quantitative feeding device according to item 1 or 2, wherein the total weight of the batch weighing hopper and the quantitative feeding hopper or the total weight of any of these hoppers is measured by switching. 4. The discharger is an electromagnetic vibration feeder, the second weighing means is a load cell, and the control circuit detects the material discharge speed based on the output of the load cell, and the material discharge speed is determined to be a predetermined material discharge rate. The continuous quantitative feeding device according to any one of the first, second and third terms, wherein the electromagnetic vibration feeder is controlled so as to maintain the same speed as the electromagnetic vibration feeder. 5 A plurality of batch weighing hoppers each having a material discharge means, a first weighing means for weighing the total weight of the plurality of batch weighing hoppers, and a plurality of batch weighing hoppers each corresponding to the plurality of batch weighing hoppers. fixed quantity supply hoppers each equipped with a discharging machine which is arranged in such a manner that the discharge amount can be adjusted, and a second weighing means for weighing the total weight of each of these fixed quantity supply hoppers;
and a control circuit for controlling the discharging machine so as to receive each output of the second weighing means and discharge the respective quantities, the material supply source being supplied to one of the batch weighing hoppers in a predetermined order. The material for one batch is fed, the material is weighed by the first weighing means, and the result is stored. When the remaining amount of material in the quantitative feeding hopper decreases and reaches a predetermined value, the material is weighed by the first weighing means. The material discharge means is driven to discharge the material supplied to the corresponding batch metering hopper into the fixed quantity supply hopper in order to empty it, and the remaining amount of material in the fixed quantity supply hopper is reduced. Then, before the predetermined value is reached again, one batch of material is supplied from the material supply source to the batch weighing hopper, and this material is weighed by the first weighing means, and this weighing is performed again. When the value does not reach a predetermined weight of the batch of material corresponding to the batch weighing hopper even after a predetermined time has elapsed, it is determined that a material blockage has occurred in the material supply source, and the discharging machine A continuous quantitative supply device characterized by being constantly driven. 6. When the weight value of any of the batch weighing hoppers reaches the predetermined weight of the material for one batch within the predetermined time, the weighing result at this time is added to the previous result. The continuous quantitative feeding device according to item 5 above. 7. The first weighing means and the second weighing means are common weighing means, and each load switching means is provided between the weighing means and the plurality of quantitative supply hoppers,
According to the item 5 or 6, the selective switching measures the total weight of the plurality of batch weighing hoppers or, in addition to these, the total weight of any one of the plurality of quantitative supply hoppers. Continuous quantitative feeding device. 8. The plurality of discharging machines are electromagnetic vibration feeders, and the second weighing means is a load cell, and each of the control circuits is controlled by the output corresponding to the quantitative supply hopper of each of the load cells. Item 5 above, wherein the material discharge speed is detected and the electromagnetic vibration feeder is controlled so that the material discharge speed becomes each predetermined material discharge speed;
The continuous quantitative feeding device according to any one of Items 6 and 7. 9. A large-capacity storage hopper for storing material, and a first cutting means for cutting out material from the hopper;
A small capacity batch measuring hopper for receiving the material cut out from the first cutting means, a second cutting means for cutting out the material from the batch measuring hopper, and the material cut out from the second cutting means. a small-capacity supply hopper, a fixed-quantity material discharge device for cutting out a fixed amount of material from the supply hopper, a remaining material amount detection means for detecting the remaining amount of material in the supply hopper, and the batch metering device. and a weighing means for detecting the total weight of the hopper, and when the remaining material amount detecting means detects that the material in the supply hopper has become less than a predetermined amount, it drives the second cutting means. , after discharging all of the material previously supplied in a predetermined batch amount into the batch weighing hopper into the supply hopper, stopping the driving of the second cutting means and driving the first cutting means; Then, the predetermined batch amount of material is cut out from the storage hopper to the batch weighing hopper by the weight detection of the weighing means, and when the predetermined batch amount is not reached even after a predetermined time has elapsed, 1. A continuous quantitative supply device, characterized in that the quantitative discharge device is always driven even when it is determined that a material blockage has occurred in a storage hopper.